Merge changes Ieb75b1d1,Id1c83c8b,I8cb3de94

* changes:
  mkbootfs: Add support for a dev node list file
  mkbootfs: Add support for dev nodes
  mkbootfs: Use getopt_long
diff --git a/code_coverage/Android.bp b/code_coverage/Android.bp
index 2cb1617..d18e7a8 100644
--- a/code_coverage/Android.bp
+++ b/code_coverage/Android.bp
@@ -24,6 +24,14 @@
                 },
             },
         },
+        riscv64: {
+            src: "empty_policy/code_coverage.riscv64.policy",
+            product_variables: {
+                native_coverage: {
+                    src: "seccomp_policy/code_coverage.riscv64.policy",
+                },
+            },
+        },
         x86: {
             src: "empty_policy/code_coverage.x86.policy",
             product_variables: {
@@ -67,6 +75,10 @@
                 },
             },
         },
+        riscv64: {
+            // riscv64 doesn't have a secondary architecture.
+            enabled: false,
+        },
         x86: {
             src: "empty_policy/code_coverage.x86_64.policy",
             product_variables: {
diff --git a/code_coverage/empty_policy/code_coverage.riscv64.policy b/code_coverage/empty_policy/code_coverage.riscv64.policy
new file mode 100644
index 0000000..9456932
--- /dev/null
+++ b/code_coverage/empty_policy/code_coverage.riscv64.policy
@@ -0,0 +1,2 @@
+# empty unless code_coverage is enabled.
+# code_coverage.riscv64.policy
diff --git a/code_coverage/seccomp_policy/code_coverage.riscv64.policy b/code_coverage/seccomp_policy/code_coverage.riscv64.policy
new file mode 100644
index 0000000..fdb4d1e
--- /dev/null
+++ b/code_coverage/seccomp_policy/code_coverage.riscv64.policy
@@ -0,0 +1,15 @@
+close: 1
+fchmod: 1
+mkdirat: 1
+msync: 1
+munmap: 1
+openat: 1
+write: 1
+fcntl: 1
+fstat: 1
+ftruncate: 1
+geteuid: 1
+lseek: 1
+mmap: 1
+rt_sigreturn: 1
+prctl: 1
diff --git a/debuggerd/Android.bp b/debuggerd/Android.bp
index 1c89472..15b5813 100644
--- a/debuggerd/Android.bp
+++ b/debuggerd/Android.bp
@@ -426,8 +426,8 @@
     local_include_dirs: ["include"],
 }
 
-cc_binary {
-    name: "tombstoned",
+cc_defaults {
+    name: "tombstoned_defaults",
     srcs: [
         "util.cpp",
         "tombstoned/intercept_manager.cpp",
@@ -446,10 +446,20 @@
         "libevent",
         "liblog",
     ],
+}
 
+cc_binary {
+    name: "tombstoned",
+    defaults: ["tombstoned_defaults"],
     init_rc: ["tombstoned/tombstoned.rc"],
 }
 
+cc_binary {
+    name: "tombstoned.microdroid",
+    defaults: ["tombstoned_defaults"],
+    init_rc: ["tombstoned/tombstoned.microdroid.rc"],
+}
+
 prebuilt_etc {
     name: "crash_dump.policy",
     sub_dir: "seccomp_policy",
@@ -457,25 +467,36 @@
     arch: {
         arm: {
             src: "seccomp_policy/crash_dump.arm.policy",
+            required: [
+                "crash_dump.policy_other",
+            ],
         },
         arm64: {
             src: "seccomp_policy/crash_dump.arm64.policy",
+            required: [
+                "crash_dump.policy_other",
+            ],
+        },
+        riscv64: {
+            src: "seccomp_policy/crash_dump.riscv64.policy",
         },
         x86: {
             src: "seccomp_policy/crash_dump.x86.policy",
+            required: [
+                "crash_dump.policy_other",
+            ],
         },
         x86_64: {
             src: "seccomp_policy/crash_dump.x86_64.policy",
+            required: [
+                "crash_dump.policy_other",
+            ],
         },
     },
-    required: [
-        "crash_dump.policy_other",
-    ],
 }
 
 
-// NB -- this installs "the other" architecture. (puts 32 bit config in on 64 bit device)
-// or at least that is the intention so that we get both of them populated
+// This installs the "other" architecture (so 32-bit on 64-bit device).
 prebuilt_etc {
     name: "crash_dump.policy_other",
     sub_dir: "seccomp_policy",
diff --git a/debuggerd/crash_dump.cpp b/debuggerd/crash_dump.cpp
index e3ea455..2a769c7 100644
--- a/debuggerd/crash_dump.cpp
+++ b/debuggerd/crash_dump.cpp
@@ -23,7 +23,6 @@
 #include <sys/types.h>
 #include <sys/un.h>
 #include <sys/wait.h>
-#include <syscall.h>
 #include <unistd.h>
 
 #include <limits>
diff --git a/debuggerd/crasher/Android.bp b/debuggerd/crasher/Android.bp
index 799163e..fe1689c 100644
--- a/debuggerd/crasher/Android.bp
+++ b/debuggerd/crasher/Android.bp
@@ -15,18 +15,18 @@
         "-fstack-protector-all",
         "-Wno-date-time",
     ],
+    tidy: false,  // crasher.cpp tests many memory access errors
     srcs: ["crasher.cpp"],
     arch: {
         arm: {
             srcs: ["arm/crashglue.S"],
-
-            neon: {
-                asflags: ["-DHAS_VFP_D32"],
-            },
         },
         arm64: {
             srcs: ["arm64/crashglue.S"],
         },
+        riscv64: {
+            srcs: ["riscv64/crashglue.S"],
+        },
         x86: {
             srcs: ["x86/crashglue.S"],
         },
diff --git a/debuggerd/crasher/arm/crashglue.S b/debuggerd/crasher/arm/crashglue.S
index 4fbfd6e..8649056 100644
--- a/debuggerd/crasher/arm/crashglue.S
+++ b/debuggerd/crasher/arm/crashglue.S
@@ -32,7 +32,6 @@
 	fconstd   d13, #13
 	fconstd   d14, #14
 	fconstd   d15, #15
-#if defined(HAS_VFP_D32)
 	fconstd   d16, #16
 	fconstd   d17, #17
 	fconstd   d18, #18
@@ -49,7 +48,6 @@
 	fconstd   d29, #29
 	fconstd   d30, #30
 	fconstd   d31, #31
-#endif
 
 	mov lr, #0
 	ldr lr, [lr]
diff --git a/debuggerd/crasher/crasher.cpp b/debuggerd/crasher/crasher.cpp
index 55490b5..4eb7382 100644
--- a/debuggerd/crasher/crasher.cpp
+++ b/debuggerd/crasher/crasher.cpp
@@ -303,6 +303,8 @@
       __asm__ volatile(".word 0xe7f0def0\n");
 #elif defined(__i386__) || defined(__x86_64__)
       __asm__ volatile("ud2\n");
+#elif defined(__riscv)
+      __asm__ volatile("unimp\n");
 #else
 #error
 #endif
diff --git a/debuggerd/crasher/riscv64/crashglue.S b/debuggerd/crasher/riscv64/crashglue.S
new file mode 100644
index 0000000..47dd93b
--- /dev/null
+++ b/debuggerd/crasher/riscv64/crashglue.S
@@ -0,0 +1,45 @@
+
+	.globl crash1
+	.globl crashnostack
+
+crash1:
+	li	x0,0xdead0000+0
+	li	x1,0xdead0000+1
+	li	x2,0xdead0000+2
+	li	x3,0xdead0000+3
+	li	x4,0xdead0000+4
+	li	x5,0xdead0000+5
+	li	x6,0xdead0000+6
+	li	x7,0xdead0000+7
+	li	x8,0xdead0000+8
+	li	x9,0xdead0000+9
+	li	x10,0xdead0000+10
+	li	x11,0xdead0000+11
+	li	x12,0xdead0000+12
+	li	x13,0xdead0000+13
+	li	x14,0xdead0000+14
+	li	x15,0xdead0000+15
+	li	x16,0xdead0000+16
+	li	x17,0xdead0000+17
+	li	x18,0xdead0000+18
+	li	x19,0xdead0000+19
+	li	x20,0xdead0000+20
+	li	x21,0xdead0000+21
+	li	x22,0xdead0000+22
+	li	x23,0xdead0000+23
+	li	x24,0xdead0000+24
+	li	x25,0xdead0000+25
+	li	x26,0xdead0000+26
+	li	x27,0xdead0000+27
+	li	x28,0xdead0000+28
+	# don't trash the stack otherwise the signal handler won't run
+	#li	$29,0xdead0000+29
+	li	x30,0xdead0000+30
+	li	x31,0xdead0000+31
+
+	j .
+
+
+crashnostack:
+	li	sp, 0
+	j .
diff --git a/debuggerd/debuggerd_test.cpp b/debuggerd/debuggerd_test.cpp
index aca476f..9c1b136 100644
--- a/debuggerd/debuggerd_test.cpp
+++ b/debuggerd/debuggerd_test.cpp
@@ -406,10 +406,10 @@
       result, R"(signal 11 \(SIGSEGV\), code 1 \(SEGV_MAPERR\), fault addr 0x[01]00000000000dead)");
 }
 
-// Marked as weak to prevent the compiler from removing the malloc in the caller. In theory, the
-// compiler could still clobber the argument register before trapping, but that's unlikely.
-__attribute__((weak)) void CrasherTest::Trap(void* ptr ATTRIBUTE_UNUSED) {
-  __builtin_trap();
+void CrasherTest::Trap(void* ptr) {
+  void (*volatile f)(void*) = nullptr;
+  __asm__ __volatile__("" : : "r"(f) : "memory");
+  f(ptr);
 }
 
 TEST_F(CrasherTest, heap_addr_in_register) {
@@ -445,6 +445,8 @@
   ASSERT_MATCH(result, "memory near x0 \\(\\[anon:");
 #elif defined(__arm__)
   ASSERT_MATCH(result, "memory near r0 \\(\\[anon:");
+#elif defined(__riscv)
+  ASSERT_MATCH(result, "memory near a0 \\(\\[anon:");
 #elif defined(__x86_64__)
   ASSERT_MATCH(result, "memory near rdi \\(\\[anon:");
 #else
@@ -828,7 +830,7 @@
 
   StartIntercept(&output_fd);
   FinishCrasher();
-  AssertDeath(SIGTRAP);
+  AssertDeath(SIGSEGV);
   FinishIntercept(&intercept_result);
 
   ASSERT_EQ(1, intercept_result) << "tombstoned reported failure";
diff --git a/debuggerd/handler/debuggerd_handler.cpp b/debuggerd/handler/debuggerd_handler.cpp
index c64de0e..37dbe86 100644
--- a/debuggerd/handler/debuggerd_handler.cpp
+++ b/debuggerd/handler/debuggerd_handler.cpp
@@ -187,27 +187,29 @@
  * mutex is being held, so we don't want to use any libc functions that
  * could allocate memory or hold a lock.
  */
-static void log_signal_summary(const siginfo_t* info) {
+static void log_signal_summary(const siginfo_t* si) {
   char main_thread_name[MAX_TASK_NAME_LEN + 1];
   if (!get_main_thread_name(main_thread_name, sizeof(main_thread_name))) {
     strncpy(main_thread_name, "<unknown>", sizeof(main_thread_name));
   }
 
-  if (info->si_signo == BIONIC_SIGNAL_DEBUGGER) {
+  if (si->si_signo == BIONIC_SIGNAL_DEBUGGER) {
     async_safe_format_log(ANDROID_LOG_INFO, "libc", "Requested dump for pid %d (%s)", __getpid(),
                           main_thread_name);
     return;
   }
 
-  // Many signals don't have an address or sender.
-  char addr_desc[32] = "";  // ", fault addr 0x1234"
-  if (signal_has_si_addr(info)) {
-    async_safe_format_buffer(addr_desc, sizeof(addr_desc), ", fault addr %p", info->si_addr);
-  }
+  // Many signals don't have a sender or extra detail, but some do...
   pid_t self_pid = __getpid();
   char sender_desc[32] = {};  // " from pid 1234, uid 666"
-  if (signal_has_sender(info, self_pid)) {
-    get_signal_sender(sender_desc, sizeof(sender_desc), info);
+  if (signal_has_sender(si, self_pid)) {
+    get_signal_sender(sender_desc, sizeof(sender_desc), si);
+  }
+  char extra_desc[32] = {};  // ", fault addr 0x1234" or ", syscall 1234"
+  if (si->si_signo == SIGSYS && si->si_code == SYS_SECCOMP) {
+    async_safe_format_buffer(extra_desc, sizeof(extra_desc), ", syscall %d", si->si_syscall);
+  } else if (signal_has_si_addr(si)) {
+    async_safe_format_buffer(extra_desc, sizeof(extra_desc), ", fault addr %p", si->si_addr);
   }
 
   char thread_name[MAX_TASK_NAME_LEN + 1];  // one more for termination
@@ -221,8 +223,8 @@
 
   async_safe_format_log(ANDROID_LOG_FATAL, "libc",
                         "Fatal signal %d (%s), code %d (%s%s)%s in tid %d (%s), pid %d (%s)",
-                        info->si_signo, get_signame(info), info->si_code, get_sigcode(info),
-                        sender_desc, addr_desc, __gettid(), thread_name, self_pid, main_thread_name);
+                        si->si_signo, get_signame(si), si->si_code, get_sigcode(si), sender_desc,
+                        extra_desc, __gettid(), thread_name, self_pid, main_thread_name);
 }
 
 /*
@@ -371,12 +373,29 @@
       {.iov_base = thread_info->ucontext, .iov_len = sizeof(ucontext_t)},
   };
 
+  constexpr size_t kHeaderSize = sizeof(version) + sizeof(siginfo_t) + sizeof(ucontext_t);
+
   if (thread_info->process_info.fdsan_table) {
     // Dynamic executables always use version 4. There is no need to increment the version number if
     // the format changes, because the sender (linker) and receiver (crash_dump) are version locked.
     version = 4;
     expected = sizeof(CrashInfoHeader) + sizeof(CrashInfoDataDynamic);
 
+    static_assert(sizeof(CrashInfoHeader) + sizeof(CrashInfoDataDynamic) ==
+                      kHeaderSize + sizeof(thread_info->process_info),
+                  "Wire protocol structs do not match the data sent.");
+#define ASSERT_SAME_OFFSET(MEMBER1, MEMBER2) \
+    static_assert(sizeof(CrashInfoHeader) + offsetof(CrashInfoDataDynamic, MEMBER1) == \
+                      kHeaderSize + offsetof(debugger_process_info, MEMBER2), \
+                  "Wire protocol offset does not match data sent: " #MEMBER1);
+    ASSERT_SAME_OFFSET(fdsan_table_address, fdsan_table);
+    ASSERT_SAME_OFFSET(gwp_asan_state, gwp_asan_state);
+    ASSERT_SAME_OFFSET(gwp_asan_metadata, gwp_asan_metadata);
+    ASSERT_SAME_OFFSET(scudo_stack_depot, scudo_stack_depot);
+    ASSERT_SAME_OFFSET(scudo_region_info, scudo_region_info);
+    ASSERT_SAME_OFFSET(scudo_ring_buffer, scudo_ring_buffer);
+#undef ASSERT_SAME_OFFSET
+
     iovs[3] = {.iov_base = &thread_info->process_info,
                .iov_len = sizeof(thread_info->process_info)};
   } else {
@@ -384,6 +403,10 @@
     version = 1;
     expected = sizeof(CrashInfoHeader) + sizeof(CrashInfoDataStatic);
 
+    static_assert(
+        sizeof(CrashInfoHeader) + sizeof(CrashInfoDataStatic) == kHeaderSize + sizeof(uintptr_t),
+        "Wire protocol structs do not match the data sent.");
+
     iovs[3] = {.iov_base = &thread_info->process_info.abort_msg, .iov_len = sizeof(uintptr_t)};
   }
   errno = 0;
diff --git a/debuggerd/libdebuggerd/tombstone.cpp b/debuggerd/libdebuggerd/tombstone.cpp
index e5b4d74..375ed8a 100644
--- a/debuggerd/libdebuggerd/tombstone.cpp
+++ b/debuggerd/libdebuggerd/tombstone.cpp
@@ -77,9 +77,9 @@
     .registers = std::move(regs), .uid = uid, .tid = target_tid,
     .thread_name = std::move(thread_name), .pid = pid, .command_line = std::move(command_line),
     .selinux_label = std::move(selinux_label), .siginfo = siginfo,
-#if defined(__aarch64__)
     // Only supported on aarch64 for now.
-        .tagged_addr_ctrl = prctl(PR_GET_TAGGED_ADDR_CTRL, 0, 0, 0, 0),
+#if defined(__aarch64__)
+    .tagged_addr_ctrl = prctl(PR_GET_TAGGED_ADDR_CTRL, 0, 0, 0, 0),
     .pac_enabled_keys = prctl(PR_PAC_GET_ENABLED_KEYS, 0, 0, 0, 0),
 #endif
   };
@@ -88,7 +88,6 @@
         if (target_tid == tid) {
           return;
         }
-        async_safe_format_log(ANDROID_LOG_ERROR, LOG_TAG, "Adding thread %d", tid);
         threads[tid] = ThreadInfo{
             .uid = thread.uid,
             .tid = tid,
diff --git a/debuggerd/libdebuggerd/tombstone_proto.cpp b/debuggerd/libdebuggerd/tombstone_proto.cpp
index 159ebc8..9a565de 100644
--- a/debuggerd/libdebuggerd/tombstone_proto.cpp
+++ b/debuggerd/libdebuggerd/tombstone_proto.cpp
@@ -82,6 +82,8 @@
   return Architecture::X86;
 #elif defined(__x86_64__)
   return Architecture::X86_64;
+#elif defined(__riscv) && (__riscv_xlen == 64)
+  return Architecture::RISCV64;
 #else
 #error Unknown architecture!
 #endif
diff --git a/debuggerd/libdebuggerd/tombstone_proto_to_text.cpp b/debuggerd/libdebuggerd/tombstone_proto_to_text.cpp
index 0265641..28154a7 100644
--- a/debuggerd/libdebuggerd/tombstone_proto_to_text.cpp
+++ b/debuggerd/libdebuggerd/tombstone_proto_to_text.cpp
@@ -47,6 +47,8 @@
       return "arm";
     case Architecture::ARM64:
       return "arm64";
+    case Architecture::RISCV64:
+      return "riscv64";
     case Architecture::X86:
       return "x86";
     case Architecture::X86_64:
@@ -62,6 +64,8 @@
       return 4;
     case Architecture::ARM64:
       return 8;
+    case Architecture::RISCV64:
+      return 8;
     case Architecture::X86:
       return 4;
     case Architecture::X86_64:
@@ -119,6 +123,10 @@
       special_registers = {"ip", "lr", "sp", "pc", "pst"};
       break;
 
+    case Architecture::RISCV64:
+      special_registers = {"ra", "sp", "pc"};
+      break;
+
     case Architecture::X86:
       special_registers = {"ebp", "esp", "eip"};
       break;
diff --git a/debuggerd/proto/tombstone.proto b/debuggerd/proto/tombstone.proto
index f0d3d3f..49865a2 100644
--- a/debuggerd/proto/tombstone.proto
+++ b/debuggerd/proto/tombstone.proto
@@ -48,8 +48,9 @@
   ARM64 = 1;
   X86 = 2;
   X86_64 = 3;
+  RISCV64 = 4;
 
-  reserved 4 to 999;
+  reserved 5 to 999;
 }
 
 message Signal {
diff --git a/debuggerd/seccomp_policy/crash_dump.riscv64.policy b/debuggerd/seccomp_policy/crash_dump.riscv64.policy
new file mode 100644
index 0000000..21887ab
--- /dev/null
+++ b/debuggerd/seccomp_policy/crash_dump.riscv64.policy
@@ -0,0 +1,37 @@
+read: 1
+write: 1
+exit: 1
+rt_sigreturn: 1
+exit_group: 1
+clock_gettime: 1
+gettimeofday: 1
+futex: 1
+getrandom: 1
+getpid: 1
+gettid: 1
+ppoll: 1
+pipe2: 1
+openat: 1
+dup: 1
+close: 1
+lseek: 1
+getdents64: 1
+faccessat: 1
+recvmsg: 1
+recvfrom: 1
+process_vm_readv: 1
+tgkill: 1
+rt_sigprocmask: 1
+rt_sigaction: 1
+rt_tgsigqueueinfo: 1
+prctl: arg0 == PR_GET_NO_NEW_PRIVS || arg0 == 0x53564d41 || arg0 == PR_PAC_RESET_KEYS
+madvise: 1
+mprotect: arg2 in 0x1|0x2
+munmap: 1
+getuid: 1
+fstat: 1
+mmap: arg2 in 0x1|0x2
+geteuid: 1
+getgid: 1
+getegid: 1
+getgroups: 1
diff --git a/debuggerd/seccomp_policy/generate.sh b/debuggerd/seccomp_policy/generate.sh
index 8c58b05..c467d9e 100755
--- a/debuggerd/seccomp_policy/generate.sh
+++ b/debuggerd/seccomp_policy/generate.sh
@@ -6,5 +6,6 @@
 CPP='cpp -undef -E -P crash_dump.policy.def'
 $CPP -D__arm__ -o crash_dump.arm.policy
 $CPP -D__aarch64__ -D__LP64__ -o crash_dump.arm64.policy
+$CPP -D__riscv -D__LP64__ -o crash_dump.riscv64.policy
 $CPP -D__i386__ -o crash_dump.x86.policy
 $CPP -D__x86_64__ -D__LP64__ -o crash_dump.x86_64.policy
diff --git a/debuggerd/test_permissive_mte/Android.bp b/debuggerd/test_permissive_mte/Android.bp
index 1c09240..d3f7520 100644
--- a/debuggerd/test_permissive_mte/Android.bp
+++ b/debuggerd/test_permissive_mte/Android.bp
@@ -18,6 +18,7 @@
 
 cc_binary {
   name: "mte_crash",
+  tidy: false,
   srcs: ["mte_crash.cpp"],
   sanitize: {
     memtag_heap: true,
diff --git a/debuggerd/tombstoned/tombstoned.microdroid.rc b/debuggerd/tombstoned/tombstoned.microdroid.rc
new file mode 100644
index 0000000..7f5c542
--- /dev/null
+++ b/debuggerd/tombstoned/tombstoned.microdroid.rc
@@ -0,0 +1,7 @@
+service tombstoned /system/bin/tombstoned.microdroid
+    user tombstoned
+    group system
+
+    socket tombstoned_crash seqpacket 0666 system system
+    socket tombstoned_intercept seqpacket 0666 system system
+    socket tombstoned_java_trace seqpacket 0666 system system
diff --git a/fastboot/Android.bp b/fastboot/Android.bp
index eed49fa..765174b 100644
--- a/fastboot/Android.bp
+++ b/fastboot/Android.bp
@@ -168,6 +168,7 @@
         "android.hardware.boot-V1-ndk",
         "libboot_control_client",
         "android.hardware.fastboot@1.1",
+        "android.hardware.fastboot-V1-ndk",
         "android.hardware.health@2.0",
         "android.hardware.health-V1-ndk",
         "libasyncio",
@@ -192,6 +193,7 @@
         "libc++fs",
         "libhealthhalutils",
         "libhealthshim",
+        "libfastbootshim",
         "libsnapshot_cow",
         "liblz4",
         "libsnapshot_nobinder",
diff --git a/fastboot/constants.h b/fastboot/constants.h
index f6fc74e..ad169d1 100644
--- a/fastboot/constants.h
+++ b/fastboot/constants.h
@@ -64,6 +64,7 @@
 #define FB_VAR_SLOT_UNBOOTABLE "slot-unbootable"
 #define FB_VAR_IS_LOGICAL "is-logical"
 #define FB_VAR_IS_USERSPACE "is-userspace"
+#define FB_VAR_IS_FORCE_DEBUGGABLE "is-force-debuggable"
 #define FB_VAR_HW_REVISION "hw-revision"
 #define FB_VAR_VARIANT "variant"
 #define FB_VAR_OFF_MODE_CHARGE_STATE "off-mode-charge"
diff --git a/fastboot/device/commands.cpp b/fastboot/device/commands.cpp
index 3799d1f..e929f42 100644
--- a/fastboot/device/commands.cpp
+++ b/fastboot/device/commands.cpp
@@ -57,8 +57,6 @@
 using android::fs_mgr::MetadataBuilder;
 using android::hal::CommandResult;
 using ::android::hardware::hidl_string;
-using ::android::hardware::fastboot::V1_0::Result;
-using ::android::hardware::fastboot::V1_0::Status;
 using android::snapshot::SnapshotManager;
 using MergeStatus = android::hal::BootControlClient::MergeStatus;
 
@@ -133,6 +131,7 @@
         {FB_VAR_PARTITION_TYPE, {GetPartitionType, GetAllPartitionArgsWithSlot}},
         {FB_VAR_IS_LOGICAL, {GetPartitionIsLogical, GetAllPartitionArgsWithSlot}},
         {FB_VAR_IS_USERSPACE, {GetIsUserspace, nullptr}},
+        {FB_VAR_IS_FORCE_DEBUGGABLE, {GetIsForceDebuggable, nullptr}},
         {FB_VAR_OFF_MODE_CHARGE_STATE, {GetOffModeChargeState, nullptr}},
         {FB_VAR_BATTERY_VOLTAGE, {GetBatteryVoltage, nullptr}},
         {FB_VAR_BATTERY_SOC_OK, {GetBatterySoCOk, nullptr}},
@@ -203,20 +202,21 @@
         return false;
     }
 
-    Result ret;
-    auto ret_val = fastboot_hal->doOemSpecificErase([&](Result result) { ret = result; });
-    if (!ret_val.isOk()) {
-        return false;
-    }
-    if (ret.status == Status::NOT_SUPPORTED) {
-        return false;
-    } else if (ret.status != Status::SUCCESS) {
-        device->WriteStatus(FastbootResult::FAIL, ret.message);
-    } else {
+    auto status = fastboot_hal->doOemSpecificErase();
+    if (status.isOk()) {
         device->WriteStatus(FastbootResult::OKAY, "Erasing succeeded");
+        return true;
     }
-
-    return true;
+    switch (status.getExceptionCode()) {
+        case EX_UNSUPPORTED_OPERATION:
+            return false;
+        case EX_SERVICE_SPECIFIC:
+            device->WriteStatus(FastbootResult::FAIL, status.getDescription());
+            return false;
+        default:
+            LOG(ERROR) << "Erase operation failed" << status.getDescription();
+            return false;
+    }
 }
 
 bool EraseHandler(FastbootDevice* device, const std::vector<std::string>& args) {
@@ -266,18 +266,16 @@
     if (args[0] == "oem postwipedata userdata") {
         return device->WriteStatus(FastbootResult::FAIL, "Unable to do oem postwipedata userdata");
     }
-
-    Result ret;
-    auto ret_val = fastboot_hal->doOemCommand(args[0], [&](Result result) { ret = result; });
-    if (!ret_val.isOk()) {
-        return device->WriteStatus(FastbootResult::FAIL, "Unable to do OEM command");
-    }
-    if (ret.status != Status::SUCCESS) {
-        return device->WriteStatus(FastbootResult::FAIL, ret.message);
+    std::string message;
+    auto status = fastboot_hal->doOemCommand(args[0], &message);
+    if (!status.isOk()) {
+        LOG(ERROR) << "Unable to do OEM command " << args[0].c_str() << status.getDescription();
+        return device->WriteStatus(FastbootResult::FAIL,
+                                   "Unable to do OEM command " + status.getDescription());
     }
 
-    device->WriteInfo(ret.message);
-    return device->WriteStatus(FastbootResult::OKAY, ret.message);
+    device->WriteInfo(message);
+    return device->WriteStatus(FastbootResult::OKAY, message);
 }
 
 bool DownloadHandler(FastbootDevice* device, const std::vector<std::string>& args) {
diff --git a/fastboot/device/fastboot_device.cpp b/fastboot/device/fastboot_device.cpp
index 4932e5c..5afeb4f 100644
--- a/fastboot/device/fastboot_device.cpp
+++ b/fastboot/device/fastboot_device.cpp
@@ -25,6 +25,7 @@
 #include <android/binder_manager.h>
 #include <android/hardware/boot/1.0/IBootControl.h>
 #include <android/hardware/fastboot/1.1/IFastboot.h>
+#include <fastbootshim.h>
 #include <fs_mgr.h>
 #include <fs_mgr/roots.h>
 #include <health-shim/shim.h>
@@ -64,6 +65,27 @@
     return nullptr;
 }
 
+std::shared_ptr<aidl::android::hardware::fastboot::IFastboot> get_fastboot_service() {
+    using aidl::android::hardware::fastboot::IFastboot;
+    using HidlFastboot = android::hardware::fastboot::V1_1::IFastboot;
+    using aidl::android::hardware::fastboot::FastbootShim;
+    auto service_name = IFastboot::descriptor + "/default"s;
+    ndk::SpAIBinder binder(AServiceManager_getService(service_name.c_str()));
+    std::shared_ptr<IFastboot> fastboot = IFastboot::fromBinder(binder);
+    if (fastboot != nullptr) {
+        LOG(INFO) << "Using AIDL fastboot service";
+        return fastboot;
+    }
+    LOG(INFO) << "Unable to get AIDL fastboot service, trying HIDL...";
+    android::sp<HidlFastboot> hidl_fastboot = HidlFastboot::getService();
+    if (hidl_fastboot != nullptr) {
+        LOG(INFO) << "Found and now using fastboot HIDL implementation";
+        return ndk::SharedRefBase::make<FastbootShim>(hidl_fastboot);
+    }
+    LOG(WARNING) << "No fastboot implementation is found.";
+    return nullptr;
+}
+
 FastbootDevice::FastbootDevice()
     : kCommandMap({
               {FB_CMD_SET_ACTIVE, SetActiveHandler},
@@ -87,7 +109,7 @@
       }),
       boot_control_hal_(BootControlClient::WaitForService()),
       health_hal_(get_health_service()),
-      fastboot_hal_(IFastboot::getService()),
+      fastboot_hal_(get_fastboot_service()),
       active_slot_("") {
     if (android::base::GetProperty("fastbootd.protocol", "usb") == "tcp") {
         transport_ = std::make_unique<ClientTcpTransport>();
diff --git a/fastboot/device/fastboot_device.h b/fastboot/device/fastboot_device.h
index 9df8fa5..fcaf249 100644
--- a/fastboot/device/fastboot_device.h
+++ b/fastboot/device/fastboot_device.h
@@ -23,8 +23,8 @@
 #include <vector>
 
 #include <BootControlClient.h>
+#include <aidl/android/hardware/fastboot/IFastboot.h>
 #include <aidl/android/hardware/health/IHealth.h>
-#include <android/hardware/fastboot/1.1/IFastboot.h>
 
 #include "commands.h"
 #include "transport.h"
@@ -52,7 +52,7 @@
     Transport* get_transport() { return transport_.get(); }
     BootControlClient* boot_control_hal() const { return boot_control_hal_.get(); }
     BootControlClient* boot1_1() const;
-    android::sp<android::hardware::fastboot::V1_1::IFastboot> fastboot_hal() {
+    std::shared_ptr<aidl::android::hardware::fastboot::IFastboot> fastboot_hal() {
         return fastboot_hal_;
     }
     std::shared_ptr<aidl::android::hardware::health::IHealth> health_hal() { return health_hal_; }
@@ -65,7 +65,7 @@
     std::unique_ptr<Transport> transport_;
     std::unique_ptr<BootControlClient> boot_control_hal_;
     std::shared_ptr<aidl::android::hardware::health::IHealth> health_hal_;
-    android::sp<android::hardware::fastboot::V1_1::IFastboot> fastboot_hal_;
+    std::shared_ptr<aidl::android::hardware::fastboot::IFastboot> fastboot_hal_;
     std::vector<char> download_data_;
     std::string active_slot_;
 };
diff --git a/fastboot/device/variables.cpp b/fastboot/device/variables.cpp
index b6eb2cd..d2a7947 100644
--- a/fastboot/device/variables.cpp
+++ b/fastboot/device/variables.cpp
@@ -41,9 +41,7 @@
 #endif
 
 using MergeStatus = android::hal::BootControlClient::MergeStatus;
-using ::android::hardware::fastboot::V1_0::FileSystemType;
-using ::android::hardware::fastboot::V1_0::Result;
-using ::android::hardware::fastboot::V1_0::Status;
+using aidl::android::hardware::fastboot::FileSystemType;
 using namespace android::fs_mgr;
 using namespace std::string_literals;
 
@@ -104,17 +102,16 @@
         *message = "Fastboot HAL not found";
         return false;
     }
+    std::string device_variant = "";
+    auto status = fastboot_hal->getVariant(&device_variant);
 
-    Result ret;
-    auto ret_val = fastboot_hal->getVariant([&](std::string device_variant, Result result) {
-        *message = device_variant;
-        ret = result;
-    });
-    if (!ret_val.isOk() || ret.status != Status::SUCCESS) {
+    if (!status.isOk()) {
         *message = "Unable to get device variant";
+        LOG(ERROR) << message->c_str() << status.getDescription();
         return false;
     }
 
+    *message = device_variant;
     return true;
 }
 
@@ -147,17 +144,14 @@
         return false;
     }
 
-    Result ret;
-    auto ret_val = fastboot_hal->getBatteryVoltageFlashingThreshold(
-            [&](int32_t voltage_threshold, Result result) {
-                *message = battery_voltage >= voltage_threshold ? "yes" : "no";
-                ret = result;
-            });
-
-    if (!ret_val.isOk() || ret.status != Status::SUCCESS) {
+    auto voltage_threshold = 0;
+    auto status = fastboot_hal->getBatteryVoltageFlashingThreshold(&voltage_threshold);
+    if (!status.isOk()) {
         *message = "Unable to get battery voltage flashing threshold";
+        LOG(ERROR) << message->c_str() << status.getDescription();
         return false;
     }
+    *message = battery_voltage >= voltage_threshold ? "yes" : "no";
 
     return true;
 }
@@ -169,18 +163,14 @@
         *message = "Fastboot HAL not found";
         return false;
     }
-
-    Result ret;
-    auto ret_val =
-            fastboot_hal->getOffModeChargeState([&](bool off_mode_charging_state, Result result) {
-                *message = off_mode_charging_state ? "1" : "0";
-                ret = result;
-            });
-    if (!ret_val.isOk() || (ret.status != Status::SUCCESS)) {
+    bool off_mode_charging_state = false;
+    auto status = fastboot_hal->getOffModeChargeState(&off_mode_charging_state);
+    if (!status.isOk()) {
         *message = "Unable to get off mode charge state";
+        LOG(ERROR) << message->c_str() << status.getDescription();
         return false;
     }
-
+    *message = off_mode_charging_state ? "1" : "0";
     return true;
 }
 
@@ -337,14 +327,11 @@
     }
 
     FileSystemType type;
-    Result ret;
-    auto ret_val =
-            fastboot_hal->getPartitionType(args[0], [&](FileSystemType fs_type, Result result) {
-                type = fs_type;
-                ret = result;
-            });
-    if (!ret_val.isOk() || (ret.status != Status::SUCCESS)) {
+    auto status = fastboot_hal->getPartitionType(args[0], &type);
+
+    if (!status.isOk()) {
         *message = "Unable to retrieve partition type";
+        LOG(ERROR) << message->c_str() << status.getDescription();
     } else {
         switch (type) {
             case FileSystemType::RAW:
@@ -392,6 +379,12 @@
     return true;
 }
 
+bool GetIsForceDebuggable(FastbootDevice* /* device */, const std::vector<std::string>& /* args */,
+                          std::string* message) {
+    *message = android::base::GetBoolProperty("ro.force.debuggable", false) ? "yes" : "no";
+    return true;
+}
+
 std::vector<std::vector<std::string>> GetAllPartitionArgsWithSlot(FastbootDevice* device) {
     std::vector<std::vector<std::string>> args;
     auto partitions = ListPartitions(device);
diff --git a/fastboot/device/variables.h b/fastboot/device/variables.h
index aa4d9fc..3b2d484 100644
--- a/fastboot/device/variables.h
+++ b/fastboot/device/variables.h
@@ -54,6 +54,8 @@
                            std::string* message);
 bool GetIsUserspace(FastbootDevice* device, const std::vector<std::string>& args,
                     std::string* message);
+bool GetIsForceDebuggable(FastbootDevice* device, const std::vector<std::string>& args,
+                          std::string* message);
 bool GetHardwareRevision(FastbootDevice* device, const std::vector<std::string>& args,
                          std::string* message);
 bool GetVariant(FastbootDevice* device, const std::vector<std::string>& args, std::string* message);
diff --git a/fastboot/fastboot.cpp b/fastboot/fastboot.cpp
index 46190f2..f1b82e9 100644
--- a/fastboot/fastboot.cpp
+++ b/fastboot/fastboot.cpp
@@ -129,23 +129,23 @@
 };
 
 struct Image {
-    const char* nickname;
-    const char* img_name;
-    const char* sig_name;
-    const char* part_name;
+    std::string nickname;
+    std::string img_name;
+    std::string sig_name;
+    std::string part_name;
     bool optional_if_no_image;
     ImageType type;
-    bool IsSecondary() const { return nickname == nullptr; }
+    bool IsSecondary() const { return nickname.empty(); }
 };
 
-static Image images[] = {
+static std::vector<Image> images = {
         // clang-format off
     { "boot",     "boot.img",         "boot.sig",     "boot",     false, ImageType::BootCritical },
     { "init_boot",
                   "init_boot.img",    "init_boot.sig",
                                                       "init_boot",
                                                                   true,  ImageType::BootCritical },
-    { nullptr,    "boot_other.img",   "boot.sig",     "boot",     true,  ImageType::Normal },
+    { "",    "boot_other.img",   "boot.sig",     "boot",     true,  ImageType::Normal },
     { "cache",    "cache.img",        "cache.sig",    "cache",    true,  ImageType::Extra },
     { "dtbo",     "dtbo.img",         "dtbo.sig",     "dtbo",     true,  ImageType::BootCritical },
     { "dts",      "dt.img",           "dt.sig",       "dts",      true,  ImageType::BootCritical },
@@ -164,7 +164,7 @@
                   "system_ext.img",   "system_ext.sig",
                                                       "system_ext",
                                                                   true,  ImageType::Normal },
-    { nullptr,    "system_other.img", "system.sig",   "system",   true,  ImageType::Normal },
+    { "",    "system_other.img", "system.sig",   "system",   true,  ImageType::Normal },
     { "userdata", "userdata.img",     "userdata.sig", "userdata", true,  ImageType::Extra },
     { "vbmeta",   "vbmeta.img",       "vbmeta.sig",   "vbmeta",   true,  ImageType::BootCritical },
     { "vbmeta_system",
@@ -191,7 +191,7 @@
                                       "vendor_kernel_boot.sig",
                                                       "vendor_kernel_boot",
                                                                   true,  ImageType::BootCritical },
-    { nullptr,    "vendor_other.img", "vendor.sig",   "vendor",   true,  ImageType::Normal },
+    { "",    "vendor_other.img", "vendor.sig",   "vendor",   true,  ImageType::Normal },
         // clang-format on
 };
 
@@ -212,8 +212,8 @@
 }
 
 static std::string find_item(const std::string& item) {
-    for (size_t i = 0; i < arraysize(images); ++i) {
-        if (images[i].nickname && item == images[i].nickname) {
+    for (size_t i = 0; i < images.size(); ++i) {
+        if (!images[i].nickname.empty() && item == images[i].nickname) {
             return find_item_given_name(images[i].img_name);
         }
     }
@@ -274,7 +274,8 @@
     // require matching serial number or device path if requested
     // at the command line with the -s option.
     if (local_serial && (strcmp(local_serial, info->serial_number) != 0 &&
-                   strcmp(local_serial, info->device_path) != 0)) return -1;
+                         strcmp(local_serial, info->device_path) != 0))
+        return -1;
     return 0;
 }
 
@@ -532,15 +533,15 @@
     std::vector<char> dtb_data;
     if (!g_dtb_path.empty()) {
         if (g_boot_img_hdr.header_version != 2) {
-                    die("Argument dtb not supported for boot image header version %d\n",
-                        g_boot_img_hdr.header_version);
+            die("Argument dtb not supported for boot image header version %d\n",
+                g_boot_img_hdr.header_version);
         }
         if (!ReadFileToVector(g_dtb_path, &dtb_data)) {
             die("cannot load '%s': %s", g_dtb_path.c_str(), strerror(errno));
         }
     }
 
-    fprintf(stderr,"creating boot image...\n");
+    fprintf(stderr, "creating boot image...\n");
 
     std::vector<char> out;
     mkbootimg(kernel_data, ramdisk_data, second_stage_data, dtb_data, g_base_addr, g_boot_img_hdr,
@@ -562,15 +563,15 @@
     }
 
     if (zip_entry.uncompressed_length > std::numeric_limits<size_t>::max()) {
-      die("entry '%s' is too large: %" PRIu64, entry_name.c_str(), zip_entry.uncompressed_length);
+        die("entry '%s' is too large: %" PRIu64, entry_name.c_str(), zip_entry.uncompressed_length);
     }
     out->resize(zip_entry.uncompressed_length);
 
     fprintf(stderr, "extracting %s (%zu MB) to RAM...\n", entry_name.c_str(),
             out->size() / 1024 / 1024);
 
-    int error = ExtractToMemory(zip, &zip_entry, reinterpret_cast<uint8_t*>(out->data()),
-                                out->size());
+    int error =
+            ExtractToMemory(zip, &zip_entry, reinterpret_cast<uint8_t*>(out->data()), out->size());
     if (error != 0) die("failed to extract '%s': %s", entry_name.c_str(), ErrorCodeString(error));
 
     return true;
@@ -618,8 +619,8 @@
     std::string path_template(make_temporary_template());
     int fd = mkstemp(&path_template[0]);
     if (fd == -1) {
-        die("failed to create temporary file for %s with template %s: %s\n",
-            path_template.c_str(), what, strerror(errno));
+        die("failed to create temporary file for %s with template %s: %s\n", path_template.c_str(),
+            what, strerror(errno));
     }
     unlink(path_template.c_str());
     return fd;
@@ -673,16 +674,15 @@
     std::string var_value;
     if (fb->GetVar(var, &var_value) != fastboot::SUCCESS) {
         fprintf(stderr, "FAILED\n\n");
-        fprintf(stderr, "Could not getvar for '%s' (%s)\n\n", var.c_str(),
-                fb->Error().c_str());
+        fprintf(stderr, "Could not getvar for '%s' (%s)\n\n", var.c_str(), fb->Error().c_str());
         return false;
     }
 
     bool match = false;
     for (const auto& option : options) {
-        if (option == var_value || (option.back() == '*' &&
-                                    !var_value.compare(0, option.length() - 1, option, 0,
-                                                       option.length() - 1))) {
+        if (option == var_value ||
+            (option.back() == '*' &&
+             !var_value.compare(0, option.length() - 1, option, 0, option.length() - 1))) {
             match = true;
             break;
         }
@@ -757,8 +757,8 @@
         die("device doesn't have required partition %s!", partition_name.c_str());
     }
     bool known_partition = false;
-    for (size_t i = 0; i < arraysize(images); ++i) {
-        if (images[i].nickname && images[i].nickname == partition_name) {
+    for (size_t i = 0; i < images.size(); ++i) {
+        if (!images[i].nickname.empty() && images[i].nickname == partition_name) {
             images[i].optional_if_no_image = false;
             known_partition = true;
         }
@@ -796,9 +796,9 @@
             bool met = CheckRequirement(cur_product, name, product, invert, options);
             if (!met) {
                 if (!force_flash) {
-                  die("requirements not met!");
+                    die("requirements not met!");
                 } else {
-                  fprintf(stderr, "requirements not met! but proceeding due to --force\n");
+                    fprintf(stderr, "requirements not met! but proceeding due to --force\n");
                 }
             }
         }
@@ -822,7 +822,6 @@
     DisplayVarOrError("Baseband Version.....", "version-baseband");
     DisplayVarOrError("Serial Number........", "serialno");
     fprintf(stderr, "--------------------------------------------\n");
-
 }
 
 static struct sparse_file** load_sparse_files(int fd, int64_t max_size) {
@@ -830,13 +829,14 @@
     if (!s) die("cannot sparse read file");
 
     if (max_size <= 0 || max_size > std::numeric_limits<uint32_t>::max()) {
-      die("invalid max size %" PRId64, max_size);
+        die("invalid max size %" PRId64, max_size);
     }
 
     int files = sparse_file_resparse(s, max_size, nullptr, 0);
     if (files < 0) die("Failed to resparse");
 
-    sparse_file** out_s = reinterpret_cast<sparse_file**>(calloc(sizeof(struct sparse_file *), files + 1));
+    sparse_file** out_s =
+            reinterpret_cast<sparse_file**>(calloc(sizeof(struct sparse_file*), files + 1));
     if (!out_s) die("Failed to allocate sparse file array");
 
     files = sparse_file_resparse(s, max_size, out_s, files);
@@ -1078,8 +1078,7 @@
     lseek(buf->fd.get(), 0, SEEK_SET);
 }
 
-static void flash_buf(const std::string& partition, struct fastboot_buffer *buf)
-{
+static void flash_buf(const std::string& partition, struct fastboot_buffer* buf) {
     sparse_file** s;
 
     if (partition == "boot" || partition == "boot_a" || partition == "boot_b" ||
@@ -1097,7 +1096,7 @@
             rewrite_vbmeta_buffer(buf, false /* vbmeta_in_boot */);
         } else if (!has_vbmeta_partition() &&
                    (partition == "boot" || partition == "boot_a" || partition == "boot_b")) {
-            rewrite_vbmeta_buffer(buf, true /* vbmeta_in_boot */ );
+            rewrite_vbmeta_buffer(buf, true /* vbmeta_in_boot */);
         }
     }
 
@@ -1143,14 +1142,14 @@
 }
 
 static bool supports_AB() {
-  return get_slot_count() >= 2;
+    return get_slot_count() >= 2;
 }
 
 // Given a current slot, this returns what the 'other' slot is.
 static std::string get_other_slot(const std::string& current_slot, int count) {
     if (count == 0) return "";
 
-    char next = (current_slot[0] - 'a' + 1)%count + 'a';
+    char next = (current_slot[0] - 'a' + 1) % count + 'a';
     return std::string(1, next);
 }
 
@@ -1185,17 +1184,17 @@
     if (count == 0) die("Device does not support slots");
 
     if (slot == "other") {
-        std::string other = get_other_slot( count);
+        std::string other = get_other_slot(count);
         if (other == "") {
-           die("No known slots");
+            die("No known slots");
         }
         return other;
     }
 
-    if (slot.size() == 1 && (slot[0]-'a' >= 0 && slot[0]-'a' < count)) return slot;
+    if (slot.size() == 1 && (slot[0] - 'a' >= 0 && slot[0] - 'a' < count)) return slot;
 
     fprintf(stderr, "Slot %s does not exist. supported slots are:\n", slot.c_str());
-    for (int i=0; i<count; i++) {
+    for (int i = 0; i < count; i++) {
         fprintf(stderr, "%c\n", (char)(i + 'a'));
     }
 
@@ -1203,7 +1202,7 @@
 }
 
 static std::string verify_slot(const std::string& slot) {
-   return verify_slot(slot, true);
+    return verify_slot(slot, true);
 }
 
 static void do_for_partition(const std::string& part, const std::string& slot,
@@ -1243,7 +1242,8 @@
  * partition does not support slots.
  */
 static void do_for_partitions(const std::string& part, const std::string& slot,
-                              const std::function<void(const std::string&)>& func, bool force_slot) {
+                              const std::function<void(const std::string&)>& func,
+                              bool force_slot) {
     std::string has_slot;
     // |part| can be vendor_boot:default. Query has-slot on the first token only.
     auto part_tokens = android::base::Split(part, ":");
@@ -1254,7 +1254,7 @@
                 slot.c_str());
         }
         if (has_slot == "yes") {
-            for (int i=0; i < get_slot_count(); i++) {
+            for (int i = 0; i < get_slot_count(); i++) {
                 do_for_partition(part, std::string(1, (char)(i + 'a')), func, force_slot);
             }
         } else {
@@ -1403,7 +1403,7 @@
 
 class ImageSource {
   public:
-    virtual ~ImageSource() {};
+    virtual ~ImageSource(){};
     virtual bool ReadFile(const std::string& name, std::vector<char>* out) const = 0;
     virtual unique_fd OpenFile(const std::string& name) const = 0;
 };
@@ -1435,13 +1435,11 @@
 
 FlashAllTool::FlashAllTool(const ImageSource& source, const std::string& slot_override,
                            bool skip_secondary, bool wipe, bool force_flash)
-   : source_(source),
-     slot_override_(slot_override),
-     skip_secondary_(skip_secondary),
-     wipe_(wipe),
-     force_flash_(force_flash)
-{
-}
+    : source_(source),
+      slot_override_(slot_override),
+      skip_secondary_(skip_secondary),
+      wipe_(wipe),
+      force_flash_(force_flash) {}
 
 void FlashAllTool::Flash() {
     DumpInfo();
@@ -1508,7 +1506,7 @@
 }
 
 void FlashAllTool::CollectImages() {
-    for (size_t i = 0; i < arraysize(images); ++i) {
+    for (size_t i = 0; i < images.size(); ++i) {
         std::string slot = slot_override_;
         if (images[i].IsSecondary()) {
             if (skip_secondary_) {
@@ -1532,7 +1530,7 @@
             if (image->optional_if_no_image) {
                 continue;
             }
-            die("could not load '%s': %s", image->img_name, strerror(errno));
+            die("could not load '%s': %s", image->img_name.c_str(), strerror(errno));
         }
         FlashImage(*image, slot, &buf);
     }
@@ -1734,8 +1732,7 @@
             fprintf(stderr, "File system type %s not supported.\n", partition_type.c_str());
             return;
         }
-        die("Formatting is not supported for file system with type '%s'.",
-            partition_type.c_str());
+        die("Formatting is not supported for file system with type '%s'.", partition_type.c_str());
     }
 
     int64_t size;
@@ -1892,32 +1889,30 @@
     g_boot_img_hdr.page_size = 2048;
     g_boot_img_hdr.dtb_addr = 0x01100000;
 
-    const struct option longopts[] = {
-        {"base", required_argument, 0, 0},
-        {"cmdline", required_argument, 0, 0},
-        {"disable-verification", no_argument, 0, 0},
-        {"disable-verity", no_argument, 0, 0},
-        {"force", no_argument, 0, 0},
-        {"fs-options", required_argument, 0, 0},
-        {"header-version", required_argument, 0, 0},
-        {"help", no_argument, 0, 'h'},
-        {"kernel-offset", required_argument, 0, 0},
-        {"os-patch-level", required_argument, 0, 0},
-        {"os-version", required_argument, 0, 0},
-        {"page-size", required_argument, 0, 0},
-        {"ramdisk-offset", required_argument, 0, 0},
-        {"set-active", optional_argument, 0, 'a'},
-        {"skip-reboot", no_argument, 0, 0},
-        {"skip-secondary", no_argument, 0, 0},
-        {"slot", required_argument, 0, 0},
-        {"tags-offset", required_argument, 0, 0},
-        {"dtb", required_argument, 0, 0},
-        {"dtb-offset", required_argument, 0, 0},
-        {"unbuffered", no_argument, 0, 0},
-        {"verbose", no_argument, 0, 'v'},
-        {"version", no_argument, 0, 0},
-        {0, 0, 0, 0}
-    };
+    const struct option longopts[] = {{"base", required_argument, 0, 0},
+                                      {"cmdline", required_argument, 0, 0},
+                                      {"disable-verification", no_argument, 0, 0},
+                                      {"disable-verity", no_argument, 0, 0},
+                                      {"force", no_argument, 0, 0},
+                                      {"fs-options", required_argument, 0, 0},
+                                      {"header-version", required_argument, 0, 0},
+                                      {"help", no_argument, 0, 'h'},
+                                      {"kernel-offset", required_argument, 0, 0},
+                                      {"os-patch-level", required_argument, 0, 0},
+                                      {"os-version", required_argument, 0, 0},
+                                      {"page-size", required_argument, 0, 0},
+                                      {"ramdisk-offset", required_argument, 0, 0},
+                                      {"set-active", optional_argument, 0, 'a'},
+                                      {"skip-reboot", no_argument, 0, 0},
+                                      {"skip-secondary", no_argument, 0, 0},
+                                      {"slot", required_argument, 0, 0},
+                                      {"tags-offset", required_argument, 0, 0},
+                                      {"dtb", required_argument, 0, 0},
+                                      {"dtb-offset", required_argument, 0, 0},
+                                      {"unbuffered", no_argument, 0, 0},
+                                      {"verbose", no_argument, 0, 'v'},
+                                      {"version", no_argument, 0, 0},
+                                      {0, 0, 0, 0}};
 
     serial = getenv("ANDROID_SERIAL");
 
@@ -1966,7 +1961,8 @@
                 setvbuf(stdout, nullptr, _IONBF, 0);
                 setvbuf(stderr, nullptr, _IONBF, 0);
             } else if (name == "version") {
-                fprintf(stdout, "fastboot version %s-%s\n", PLATFORM_TOOLS_VERSION, android::build::GetBuildNumber().c_str());
+                fprintf(stdout, "fastboot version %s-%s\n", PLATFORM_TOOLS_VERSION,
+                        android::build::GetBuildNumber().c_str());
                 fprintf(stdout, "Installed as %s\n", android::base::GetExecutablePath().c_str());
                 return 0;
             } else {
@@ -2024,9 +2020,9 @@
         return 1;
     }
     fastboot::DriverCallbacks driver_callbacks = {
-        .prolog = Status,
-        .epilog = Epilog,
-        .info = InfoMessage,
+            .prolog = Status,
+            .epilog = Epilog,
+            .info = InfoMessage,
     };
     fastboot::FastBootDriver fastboot_driver(transport, driver_callbacks, false);
     fb = &fastboot_driver;
@@ -2063,7 +2059,8 @@
             std::string partition = next_arg(&args);
             auto erase = [&](const std::string& partition) {
                 std::string partition_type;
-                if (fb->GetVar("partition-type:" + partition, &partition_type) == fastboot::SUCCESS &&
+                if (fb->GetVar("partition-type:" + partition, &partition_type) ==
+                            fastboot::SUCCESS &&
                     fs_get_generator(partition_type) != nullptr) {
                     fprintf(stderr, "******** Did you mean to fastboot format this %s partition?\n",
                             partition_type.c_str());
@@ -2118,7 +2115,6 @@
                 } else {
                     syntax_error("unknown reboot target %s", what.c_str());
                 }
-
             }
             if (!args.empty()) syntax_error("junk after reboot command");
         } else if (command == FB_CMD_REBOOT_BOOTLOADER) {
@@ -2149,7 +2145,7 @@
             }
             if (fname.empty()) die("cannot determine image filename for '%s'", pname.c_str());
 
-            auto flash = [&](const std::string &partition) {
+            auto flash = [&](const std::string& partition) {
                 if (should_flash_in_userspace(partition) && !is_userspace_fastboot() &&
                     !force_flash) {
                     die("The partition you are trying to flash is dynamic, and "
@@ -2178,7 +2174,8 @@
             do_for_partitions(partition, slot_override, flashraw, true);
         } else if (command == "flashall") {
             if (slot_override == "all") {
-                fprintf(stderr, "Warning: slot set to 'all'. Secondary slots will not be flashed.\n");
+                fprintf(stderr,
+                        "Warning: slot set to 'all'. Secondary slots will not be flashed.\n");
                 do_flashall(slot_override, true, wants_wipe, force_flash);
             } else {
                 do_flashall(slot_override, skip_secondary, wants_wipe, force_flash);
@@ -2187,7 +2184,8 @@
         } else if (command == "update") {
             bool slot_all = (slot_override == "all");
             if (slot_all) {
-                fprintf(stderr, "Warning: slot set to 'all'. Secondary slots will not be flashed.\n");
+                fprintf(stderr,
+                        "Warning: slot set to 'all'. Secondary slots will not be flashed.\n");
             }
             std::string filename = "update.zip";
             if (!args.empty()) {
@@ -2214,10 +2212,9 @@
         } else if (command == "flashing") {
             if (args.empty()) {
                 syntax_error("missing 'flashing' command");
-            } else if (args.size() == 1 && (args[0] == "unlock" || args[0] == "lock" ||
-                                            args[0] == "unlock_critical" ||
-                                            args[0] == "lock_critical" ||
-                                            args[0] == "get_unlock_ability")) {
+            } else if (args.size() == 1 &&
+                       (args[0] == "unlock" || args[0] == "lock" || args[0] == "unlock_critical" ||
+                        args[0] == "lock_critical" || args[0] == "get_unlock_ability")) {
                 do_oem_command("flashing", &args);
             } else {
                 syntax_error("unknown 'flashing' command %s", args[0].c_str());
@@ -2272,7 +2269,7 @@
         if (force_flash) {
             CancelSnapshotIfNeeded();
         }
-        std::vector<std::string> partitions = { "userdata", "cache", "metadata" };
+        std::vector<std::string> partitions = {"userdata", "cache", "metadata"};
         for (const auto& partition : partitions) {
             std::string partition_type;
             if (fb->GetVar("partition-type:" + partition, &partition_type) != fastboot::SUCCESS) {
@@ -2334,8 +2331,7 @@
     unsigned fsOptions = 0;
 
     std::vector<std::string> options = android::base::Split(arg, ",");
-    if (options.size() < 1)
-        syntax_error("bad options: %s", arg);
+    if (options.size() < 1) syntax_error("bad options: %s", arg);
 
     for (size_t i = 0; i < options.size(); ++i) {
         if (options[i] == "casefold")
diff --git a/fastboot/socket_test.cpp b/fastboot/socket_test.cpp
index 373abc3..74ff377 100644
--- a/fastboot/socket_test.cpp
+++ b/fastboot/socket_test.cpp
@@ -293,23 +293,23 @@
 }
 
 TEST(SocketMockTest, TestSendFailure) {
-    SocketMock* mock = new SocketMock;
+    std::unique_ptr<SocketMock> mock(new SocketMock);
 
     mock->ExpectSendFailure("foo");
-    EXPECT_FALSE(SendString(mock, "foo"));
+    EXPECT_FALSE(SendString(mock.get(), "foo"));
 
-    EXPECT_NONFATAL_FAILURE(SendString(mock, "foo"), "no message was expected");
+    EXPECT_NONFATAL_FAILURE(SendString(mock.get(), "foo"), "no message was expected");
 
     mock->ExpectSend("foo");
-    EXPECT_NONFATAL_FAILURE(SendString(mock, "bar"), "expected foo, but got bar");
-    EXPECT_TRUE(SendString(mock, "foo"));
+    EXPECT_NONFATAL_FAILURE(SendString(mock.get(), "bar"), "expected foo, but got bar");
+    EXPECT_TRUE(SendString(mock.get(), "foo"));
 
     mock->AddReceive("foo");
-    EXPECT_NONFATAL_FAILURE(SendString(mock, "foo"), "called out-of-order");
-    EXPECT_TRUE(ReceiveString(mock, "foo"));
+    EXPECT_NONFATAL_FAILURE(SendString(mock.get(), "foo"), "called out-of-order");
+    EXPECT_TRUE(ReceiveString(mock.get(), "foo"));
 
     mock->ExpectSend("foo");
-    EXPECT_NONFATAL_FAILURE(delete mock, "1 event(s) were not handled");
+    EXPECT_NONFATAL_FAILURE(mock.reset(), "1 event(s) were not handled");
 }
 
 TEST(SocketMockTest, TestReceiveSuccess) {
@@ -331,33 +331,33 @@
 }
 
 TEST(SocketMockTest, TestReceiveFailure) {
-    SocketMock* mock = new SocketMock;
+    std::unique_ptr<SocketMock> mock(new SocketMock);
 
     mock->AddReceiveFailure();
-    EXPECT_FALSE(ReceiveString(mock, "foo"));
+    EXPECT_FALSE(ReceiveString(mock.get(), "foo"));
     EXPECT_FALSE(mock->ReceiveTimedOut());
 
     mock->AddReceiveTimeout();
-    EXPECT_FALSE(ReceiveString(mock, "foo"));
+    EXPECT_FALSE(ReceiveString(mock.get(), "foo"));
     EXPECT_TRUE(mock->ReceiveTimedOut());
 
     mock->AddReceive("foo");
     mock->AddReceiveFailure();
-    EXPECT_FALSE(ReceiveString(mock, "foobar"));
+    EXPECT_FALSE(ReceiveString(mock.get(), "foobar"));
 
-    EXPECT_NONFATAL_FAILURE(ReceiveString(mock, "foo"), "no message was ready");
+    EXPECT_NONFATAL_FAILURE(ReceiveString(mock.get(), "foo"), "no message was ready");
 
     mock->ExpectSend("foo");
-    EXPECT_NONFATAL_FAILURE(ReceiveString(mock, "foo"), "called out-of-order");
-    EXPECT_TRUE(SendString(mock, "foo"));
+    EXPECT_NONFATAL_FAILURE(ReceiveString(mock.get(), "foo"), "called out-of-order");
+    EXPECT_TRUE(SendString(mock.get(), "foo"));
 
     char c;
     mock->AddReceive("foo");
     EXPECT_NONFATAL_FAILURE(mock->Receive(&c, 1, 0), "not enough bytes (1) for foo");
-    EXPECT_TRUE(ReceiveString(mock, "foo"));
+    EXPECT_TRUE(ReceiveString(mock.get(), "foo"));
 
     mock->AddReceive("foo");
-    EXPECT_NONFATAL_FAILURE(delete mock, "1 event(s) were not handled");
+    EXPECT_NONFATAL_FAILURE(mock.reset(), "1 event(s) were not handled");
 }
 
 TEST(SocketMockTest, TestAcceptSuccess) {
@@ -372,14 +372,14 @@
 }
 
 TEST(SocketMockTest, TestAcceptFailure) {
-    SocketMock* mock = new SocketMock;
+    std::unique_ptr<SocketMock> mock(new SocketMock);
 
     EXPECT_NONFATAL_FAILURE(mock->Accept(), "no socket was ready");
 
     mock->ExpectSend("foo");
     EXPECT_NONFATAL_FAILURE(mock->Accept(), "called out-of-order");
-    EXPECT_TRUE(SendString(mock, "foo"));
+    EXPECT_TRUE(SendString(mock.get(), "foo"));
 
     mock->AddAccept(nullptr);
-    EXPECT_NONFATAL_FAILURE(delete mock, "1 event(s) were not handled");
+    EXPECT_NONFATAL_FAILURE(mock.reset(), "1 event(s) were not handled");
 }
diff --git a/fs_mgr/Android.bp b/fs_mgr/Android.bp
index bebf19e..dd61272 100644
--- a/fs_mgr/Android.bp
+++ b/fs_mgr/Android.bp
@@ -251,41 +251,8 @@
     },
     symlinks: [
         "clean_scratch_files",
-    ],
-}
-
-cc_binary {
-    name: "set-verity-state",
-    srcs: ["set-verity-state.cpp"],
-    shared_libs: [
-        "libbase",
-        "libbinder",
-        "libcrypto",
-        "libcrypto_utils",
-        "libfs_mgr_binder",
-        "libutils",
-    ],
-    static_libs: [
-        "libavb_user",
-    ],
-    header_libs: [
-        "libcutils_headers",
-    ],
-
-    cflags: ["-Werror"],
-    cppflags: [
-        "-DALLOW_DISABLE_VERITY=0",
-    ],
-    product_variables: {
-        debuggable: {
-            cppflags: [
-                "-UALLOW_DISABLE_VERITY",
-                "-DALLOW_DISABLE_VERITY=1",
-            ],
-        },
-    },
-    symlinks: [
-        "enable-verity",
         "disable-verity",
+        "enable-verity",
+        "set-verity-state",
     ],
 }
diff --git a/fs_mgr/OWNERS b/fs_mgr/OWNERS
index 6f1059b..bd46489 100644
--- a/fs_mgr/OWNERS
+++ b/fs_mgr/OWNERS
@@ -1,4 +1,4 @@
-# Bug component: 30545
+# Bug component: 325626
 bowgotsai@google.com
 dvander@google.com
 elsk@google.com
diff --git a/fs_mgr/fs_mgr.cpp b/fs_mgr/fs_mgr.cpp
index 27137a2..1c1ab48 100644
--- a/fs_mgr/fs_mgr.cpp
+++ b/fs_mgr/fs_mgr.cpp
@@ -2191,36 +2191,22 @@
         std::vector<std::string> tokens = android::base::Split(target.data, " \t\r\n");
         if (tokens[0] != "0" && tokens[0] != "1") {
             LOG(WARNING) << "Unrecognized device mapper version in " << target.data;
-            return {};
         }
 
         // Hashtree algorithm & root digest are the 8th & 9th token in the output.
-        return HashtreeInfo{.algorithm = android::base::Trim(tokens[7]),
-                            .root_digest = android::base::Trim(tokens[8])};
+        return HashtreeInfo{
+                .algorithm = android::base::Trim(tokens[7]),
+                .root_digest = android::base::Trim(tokens[8]),
+                .check_at_most_once = target.data.find("check_at_most_once") != std::string::npos};
     }
 
     return {};
 }
 
 bool fs_mgr_verity_is_check_at_most_once(const android::fs_mgr::FstabEntry& entry) {
-    if (!entry.fs_mgr_flags.avb) {
-        return false;
-    }
-
-    DeviceMapper& dm = DeviceMapper::Instance();
-    std::string device = GetVerityDeviceName(entry);
-
-    std::vector<DeviceMapper::TargetInfo> table;
-    if (dm.GetState(device) == DmDeviceState::INVALID || !dm.GetTableInfo(device, &table)) {
-        return false;
-    }
-    for (const auto& target : table) {
-        if (strcmp(target.spec.target_type, "verity") == 0 &&
-            target.data.find("check_at_most_once") != std::string::npos) {
-            return true;
-        }
-    }
-    return false;
+    auto hashtree_info = fs_mgr_get_hashtree_info(entry);
+    if (!hashtree_info) return false;
+    return hashtree_info->check_at_most_once;
 }
 
 std::string fs_mgr_get_super_partition_name(int slot) {
diff --git a/fs_mgr/fs_mgr_fstab.cpp b/fs_mgr/fs_mgr_fstab.cpp
index 76ef9e4..36bd75d 100644
--- a/fs_mgr/fs_mgr_fstab.cpp
+++ b/fs_mgr/fs_mgr_fstab.cpp
@@ -488,13 +488,21 @@
     return boot_devices;
 }
 
-template <typename Pred>
-std::vector<FstabEntry*> GetEntriesByPred(Fstab* fstab, const Pred& pred) {
+// Helper class that maps Fstab* -> FstabEntry; const Fstab* -> const FstabEntry.
+template <typename FstabPtr>
+struct FstabPtrEntry {
+    using is_const_fstab = std::is_const<std::remove_pointer_t<FstabPtr>>;
+    using type = std::conditional_t<is_const_fstab::value, const FstabEntry, FstabEntry>;
+};
+
+template <typename FstabPtr, typename FstabPtrEntryType = typename FstabPtrEntry<FstabPtr>::type,
+          typename Pred>
+std::vector<FstabPtrEntryType*> GetEntriesByPred(FstabPtr fstab, const Pred& pred) {
     if (fstab == nullptr) {
         return {};
     }
-    std::vector<FstabEntry*> entries;
-    for (auto&& entry : *fstab) {
+    std::vector<FstabPtrEntryType*> entries;
+    for (FstabPtrEntryType& entry : *fstab) {
         if (pred(entry)) {
             entries.push_back(&entry);
         }
@@ -754,10 +762,11 @@
 }
 
 #ifdef NO_SKIP_MOUNT
-bool SkipMountingPartitions(Fstab*, bool) {
-    return true;
-}
+static constexpr bool kNoSkipMount = true;
 #else
+static constexpr bool kNoSkipMount = false;
+#endif
+
 // For GSI to skip mounting /product and /system_ext, until there are well-defined interfaces
 // between them and /system. Otherwise, the GSI flashed on /system might not be able to work with
 // device-specific /product and /system_ext. skip_mount.cfg belongs to system_ext partition because
@@ -765,17 +774,24 @@
 // /system/system_ext because GSI is a single system.img that includes the contents of system_ext
 // partition and product partition under /system/system_ext and /system/product, respectively.
 bool SkipMountingPartitions(Fstab* fstab, bool verbose) {
-    static constexpr char kSkipMountConfig[] = "/system/system_ext/etc/init/config/skip_mount.cfg";
-
-    std::string skip_config;
-    auto save_errno = errno;
-    if (!ReadFileToString(kSkipMountConfig, &skip_config)) {
-        errno = save_errno;  // missing file is expected
+    if (kNoSkipMount) {
         return true;
     }
 
+    static constexpr char kSkipMountConfig[] = "/system/system_ext/etc/init/config/skip_mount.cfg";
+
+    std::string skip_mount_config;
+    auto save_errno = errno;
+    if (!ReadFileToString(kSkipMountConfig, &skip_mount_config)) {
+        errno = save_errno;  // missing file is expected
+        return true;
+    }
+    return SkipMountWithConfig(skip_mount_config, fstab, verbose);
+}
+
+bool SkipMountWithConfig(const std::string& skip_mount_config, Fstab* fstab, bool verbose) {
     std::vector<std::string> skip_mount_patterns;
-    for (const auto& line : Split(skip_config, "\n")) {
+    for (const auto& line : Split(skip_mount_config, "\n")) {
         if (line.empty() || StartsWith(line, "#")) {
             continue;
         }
@@ -801,7 +817,6 @@
     fstab->erase(remove_from, fstab->end());
     return true;
 }
-#endif
 
 // Loads the fstab file and combines with fstab entries passed in from device tree.
 bool ReadDefaultFstab(Fstab* fstab) {
@@ -828,25 +843,27 @@
     return !fstab->empty();
 }
 
-FstabEntry* GetEntryForMountPoint(Fstab* fstab, const std::string& path) {
-    if (fstab == nullptr) {
-        return nullptr;
-    }
-
-    for (auto& entry : *fstab) {
-        if (entry.mount_point == path) {
-            return &entry;
-        }
-    }
-
-    return nullptr;
-}
-
 std::vector<FstabEntry*> GetEntriesForMountPoint(Fstab* fstab, const std::string& path) {
     return GetEntriesByPred(fstab,
                             [&path](const FstabEntry& entry) { return entry.mount_point == path; });
 }
 
+std::vector<const FstabEntry*> GetEntriesForMountPoint(const Fstab* fstab,
+                                                       const std::string& path) {
+    return GetEntriesByPred(fstab,
+                            [&path](const FstabEntry& entry) { return entry.mount_point == path; });
+}
+
+FstabEntry* GetEntryForMountPoint(Fstab* fstab, const std::string& path) {
+    std::vector<FstabEntry*> entries = GetEntriesForMountPoint(fstab, path);
+    return entries.empty() ? nullptr : entries.front();
+}
+
+const FstabEntry* GetEntryForMountPoint(const Fstab* fstab, const std::string& path) {
+    std::vector<const FstabEntry*> entries = GetEntriesForMountPoint(fstab, path);
+    return entries.empty() ? nullptr : entries.front();
+}
+
 std::set<std::string> GetBootDevices() {
     // First check bootconfig, then kernel commandline, then the device tree
     std::string dt_file_name = get_android_dt_dir() + "/boot_devices";
diff --git a/fs_mgr/fs_mgr_overlayfs.cpp b/fs_mgr/fs_mgr_overlayfs.cpp
index 6213aeb..6349c20 100644
--- a/fs_mgr/fs_mgr_overlayfs.cpp
+++ b/fs_mgr/fs_mgr_overlayfs.cpp
@@ -68,6 +68,9 @@
 
 namespace {
 
+constexpr char kDataScratchSizeMbProp[] = "fs_mgr.overlayfs.data_scratch_size_mb";
+constexpr char kPreferCacheBackingStorageProp[] = "fs_mgr.overlayfs.prefer_cache_backing_storage";
+
 bool fs_mgr_access(const std::string& path) {
     return access(path.c_str(), F_OK) == 0;
 }
@@ -99,6 +102,10 @@
 const auto kScratchMountPoint = "/mnt/scratch"s;
 const auto kCacheMountPoint = "/cache"s;
 
+bool IsABDevice() {
+    return !android::base::GetProperty("ro.boot.slot_suffix", "").empty();
+}
+
 std::vector<const std::string> OverlayMountPoints() {
     // Never fallback to legacy cache mount point if within a DSU system,
     // because running a DSU system implies the device supports dynamic
@@ -106,6 +113,14 @@
     if (fs_mgr_is_dsu_running()) {
         return {kScratchMountPoint};
     }
+
+    // For non-A/B devices prefer cache backing storage if
+    // kPreferCacheBackingStorageProp property set.
+    if (!IsABDevice() && android::base::GetBoolProperty(kPreferCacheBackingStorageProp, false) &&
+        android::base::GetIntProperty("ro.vendor.api_level", -1) < __ANDROID_API_T__) {
+        return {kCacheMountPoint, kScratchMountPoint};
+    }
+
     return {kScratchMountPoint, kCacheMountPoint};
 }
 
@@ -200,6 +215,24 @@
     return (info.feat_ro_compat & EXT4_FEATURE_RO_COMPAT_SHARED_BLOCKS) != 0;
 }
 
+#define F2FS_SUPER_OFFSET 1024
+#define F2FS_FEATURE_OFFSET 2180
+#define F2FS_FEATURE_RO 0x4000
+bool fs_mgr_is_read_only_f2fs(const std::string& dev) {
+    if (!fs_mgr_is_f2fs(dev)) return false;
+
+    android::base::unique_fd fd(open(dev.c_str(), O_RDONLY | O_CLOEXEC));
+    if (fd < 0) return false;
+
+    __le32 feat;
+    if ((TEMP_FAILURE_RETRY(lseek64(fd, F2FS_SUPER_OFFSET + F2FS_FEATURE_OFFSET, SEEK_SET)) < 0) ||
+        (TEMP_FAILURE_RETRY(read(fd, &feat, sizeof(feat))) < 0)) {
+        return false;
+    }
+
+    return (feat & cpu_to_le32(F2FS_FEATURE_RO)) != 0;
+}
+
 bool fs_mgr_overlayfs_enabled(FstabEntry* entry) {
     // readonly filesystem, can not be mount -o remount,rw
     // for squashfs, erofs or if free space is (near) zero making such a remount
@@ -214,6 +247,11 @@
         return true;
     }
 
+    // f2fs read-only mode doesn't support remount,rw
+    if (fs_mgr_is_read_only_f2fs(entry->blk_device)) {
+        return true;
+    }
+
     // check if ext4 de-dupe
     auto has_shared_blocks = fs_mgr_has_shared_blocks(entry->mount_point, entry->blk_device);
     if (!has_shared_blocks && (entry->mount_point == "/system")) {
@@ -293,8 +331,14 @@
     return major > 5 || (major == 5 && minor >= 15);
 }
 
+const std::string fs_mgr_mount_point(const std::string& mount_point) {
+    if ("/"s != mount_point) return mount_point;
+    return "/system";
+}
+
 // default options for mount_point, returns empty string for none available.
-std::string fs_mgr_get_overlayfs_options(const std::string& mount_point) {
+std::string fs_mgr_get_overlayfs_options(const FstabEntry& entry) {
+    const auto mount_point = fs_mgr_mount_point(entry.mount_point);
     auto candidate = fs_mgr_get_overlayfs_candidate(mount_point);
     if (candidate.empty()) return "";
     auto ret = kLowerdirOption + mount_point + "," + kUpperdirOption + candidate + kUpperName +
@@ -305,14 +349,14 @@
     if (KernelSupportsUserXattrs()) {
         ret += ",userxattr";
     }
+    for (const auto& flag : android::base::Split(entry.fs_options, ",")) {
+        if (android::base::StartsWith(flag, "context=")) {
+            ret += "," + flag;
+        }
+    }
     return ret;
 }
 
-const std::string fs_mgr_mount_point(const std::string& mount_point) {
-    if ("/"s != mount_point) return mount_point;
-    return "/system";
-}
-
 constexpr char kOverlayfsFileContext[] = "u:object_r:overlayfs_file:s0";
 
 class AutoSetFsCreateCon final {
@@ -437,6 +481,28 @@
     return true;
 }
 
+OverlayfsTeardownResult TeardownDataScratch(IImageManager* images,
+                                            const std::string& partition_name, bool was_mounted) {
+    if (!images) {
+        return OverlayfsTeardownResult::Error;
+    }
+    if (!images->DisableImage(partition_name)) {
+        return OverlayfsTeardownResult::Error;
+    }
+    if (was_mounted) {
+        // If overlayfs was mounted, don't bother trying to unmap since
+        // it'll fail and create error spam.
+        return OverlayfsTeardownResult::Busy;
+    }
+    if (!images->UnmapImageIfExists(partition_name)) {
+        return OverlayfsTeardownResult::Busy;
+    }
+    if (!images->DeleteBackingImage(partition_name)) {
+        return OverlayfsTeardownResult::Busy;
+    }
+    return OverlayfsTeardownResult::Ok;
+}
+
 OverlayfsTeardownResult fs_mgr_overlayfs_teardown_scratch(const std::string& overlay,
                                                           bool* change) {
     // umount and delete kScratchMountPoint storage if we have logical partitions
@@ -459,24 +525,9 @@
 
     auto images = IImageManager::Open("remount", 10s);
     if (images && images->BackingImageExists(partition_name)) {
-        if (!images->DisableImage(partition_name)) {
-            return OverlayfsTeardownResult::Error;
-        }
-        if (was_mounted) {
-            // If overlayfs was mounted, don't bother trying to unmap since
-            // it'll fail and create error spam.
-            return OverlayfsTeardownResult::Busy;
-        }
-        if (!images->UnmapImageIfExists(partition_name)) {
-            return OverlayfsTeardownResult::Busy;
-        }
-        if (!images->DeleteBackingImage(partition_name)) {
-            return OverlayfsTeardownResult::Busy;
-        }
-
         // No need to check super partition, if we knew we had a scratch device
         // in /data.
-        return OverlayfsTeardownResult::Ok;
+        return TeardownDataScratch(images.get(), partition_name, was_mounted);
     }
 
     auto slot_number = fs_mgr_overlayfs_slot_number();
@@ -664,8 +715,9 @@
     return info;
 }
 
-bool fs_mgr_overlayfs_mount(const std::string& mount_point) {
-    auto options = fs_mgr_get_overlayfs_options(mount_point);
+bool fs_mgr_overlayfs_mount(const FstabEntry& entry) {
+    const auto mount_point = fs_mgr_mount_point(entry.mount_point);
+    const auto options = fs_mgr_get_overlayfs_options(entry);
     if (options.empty()) return false;
 
     auto retval = true;
@@ -1061,7 +1113,10 @@
         return false;
     }
     if (!images->BackingImageExists(partition_name)) {
-        uint64_t size = GetIdealDataScratchSize();
+        auto size = android::base::GetUintProperty<uint64_t>(kDataScratchSizeMbProp, 0) * 1_MiB;
+        if (!size) {
+            size = GetIdealDataScratchSize();
+        }
         if (!size) {
             size = 2_GiB;
         }
@@ -1075,12 +1130,14 @@
     }
     if (!images->MapImageDevice(partition_name, 10s, scratch_device)) {
         LERROR << "could not map scratch image";
+        // If we cannot use this image, then remove it.
+        TeardownDataScratch(images.get(), partition_name, false /* was_mounted */);
         return false;
     }
     return true;
 }
 
-static bool CanUseSuperPartition(const Fstab& fstab, bool* is_virtual_ab) {
+static bool CanUseSuperPartition(const Fstab& fstab) {
     auto slot_number = fs_mgr_overlayfs_slot_number();
     auto super_device = fs_mgr_overlayfs_super_device(slot_number);
     if (!fs_mgr_rw_access(super_device) || !fs_mgr_overlayfs_has_logical(fstab)) {
@@ -1090,7 +1147,6 @@
     if (!metadata) {
         return false;
     }
-    *is_virtual_ab = !!(metadata->header.flags & LP_HEADER_FLAG_VIRTUAL_AB_DEVICE);
     return true;
 }
 
@@ -1103,12 +1159,16 @@
         return *partition_exists;
     }
 
-    bool is_virtual_ab = false;
-    if (CanUseSuperPartition(fstab, &is_virtual_ab)) {
-        bool can_use_data = false;
-        if (is_virtual_ab && FilesystemHasReliablePinning("/data", &can_use_data) && can_use_data) {
-            return CreateScratchOnData(scratch_device, partition_exists);
+    // Try ImageManager on /data first.
+    bool can_use_data = false;
+    if (FilesystemHasReliablePinning("/data", &can_use_data) && can_use_data) {
+        if (CreateScratchOnData(scratch_device, partition_exists)) {
+            return true;
         }
+        LOG(WARNING) << "Failed to allocate scratch on /data, fallback to use free space on super";
+    }
+    // If that fails, see if we can land on super.
+    if (CanUseSuperPartition(fstab)) {
         return CreateDynamicScratch(scratch_device, partition_exists);
     }
     return false;
@@ -1292,12 +1352,13 @@
             scratch_can_be_mounted = false;
             TryMountScratch();
         }
-        ret &= fs_mgr_overlayfs_mount(mount_point);
+        ret &= fs_mgr_overlayfs_mount(entry);
     }
     return ret;
 }
 
-bool fs_mgr_overlayfs_setup(const char* mount_point, bool* want_reboot, bool just_disabled_verity) {
+bool fs_mgr_overlayfs_setup(const Fstab& fstab, const char* mount_point, bool* want_reboot,
+                            bool just_disabled_verity) {
     if (!OverlayfsSetupAllowed(/*verbose=*/true)) {
         return false;
     }
@@ -1307,12 +1368,6 @@
         return false;
     }
 
-    Fstab fstab;
-    if (!ReadDefaultFstab(&fstab)) {
-        LOG(ERROR) << "Could not read fstab";
-        return false;
-    }
-
     auto candidates = fs_mgr_overlayfs_candidate_list(fstab);
     for (auto it = candidates.begin(); it != candidates.end();) {
         if (mount_point &&
diff --git a/fs_mgr/fs_mgr_priv_overlayfs.h b/fs_mgr/fs_mgr_priv_overlayfs.h
index 45b954d..2033701 100644
--- a/fs_mgr/fs_mgr_priv_overlayfs.h
+++ b/fs_mgr/fs_mgr_priv_overlayfs.h
@@ -29,8 +29,8 @@
 //
 // If |want_reboot| is non-null, and a reboot is needed to apply overlays, then
 // it will be true on return. The caller is responsible for initializing it.
-bool fs_mgr_overlayfs_setup(const char* mount_point = nullptr, bool* want_reboot = nullptr,
-                            bool just_disabled_verity = true);
+bool fs_mgr_overlayfs_setup(const android::fs_mgr::Fstab& fstab, const char* mount_point = nullptr,
+                            bool* want_reboot = nullptr, bool just_disabled_verity = true);
 
 enum class OverlayfsTeardownResult {
     Ok,
diff --git a/fs_mgr/fs_mgr_remount.cpp b/fs_mgr/fs_mgr_remount.cpp
index 2edaaad..5fddf86 100644
--- a/fs_mgr/fs_mgr_remount.cpp
+++ b/fs_mgr/fs_mgr_remount.cpp
@@ -22,6 +22,7 @@
 #include <sys/vfs.h>
 #include <unistd.h>
 
+#include <iostream>
 #include <string>
 #include <thread>
 #include <utility>
@@ -33,6 +34,7 @@
 #include <android-base/strings.h>
 #include <android/os/IVold.h>
 #include <binder/IServiceManager.h>
+#include <binder/ProcessState.h>
 #include <bootloader_message/bootloader_message.h>
 #include <cutils/android_reboot.h>
 #include <fs_mgr_overlayfs.h>
@@ -50,17 +52,34 @@
 namespace {
 
 void usage() {
-    LOG(INFO) << getprogname()
-              << " [-h] [-R] [-T fstab_file] [partition]...\n"
-                 "\t-h --help\tthis help\n"
-                 "\t-R --reboot\tdisable verity & reboot to facilitate remount\n"
-                 "\t-T --fstab\tcustom fstab file location\n"
-                 "\tpartition\tspecific partition(s) (empty does all)\n"
-                 "\n"
-                 "Remount specified partition(s) read-write, by name or mount point.\n"
-                 "-R notwithstanding, verity must be disabled on partition(s).\n"
-                 "-R within a DSU guest system reboots into the DSU instead of the host system,\n"
-                 "this command would enable DSU (one-shot) if not already enabled.";
+    const std::string progname = getprogname();
+    if (progname == "disable-verity" || progname == "enable-verity" ||
+        progname == "set-verity-state") {
+        std::cout << "Usage: disable-verity\n"
+                  << "       enable-verity\n"
+                  << "       set-verity-state [0|1]\n"
+                  << R"(
+Options:
+    -h --help       this help
+    -R --reboot     automatic reboot if needed for new settings to take effect
+    -v --verbose    be noisy)"
+                  << std::endl;
+    } else {
+        std::cout << "Usage: " << progname << " [-h] [-R] [-T fstab_file] [partition]...\n"
+                  << R"(
+Options:
+    -h --help       this help
+    -R --reboot     disable verity & reboot to facilitate remount
+    -v --verbose    be noisy
+    -T --fstab      custom fstab file location
+    partition       specific partition(s) (empty does all)
+
+Remount specified partition(s) read-write, by name or mount point.
+-R notwithstanding, verity must be disabled on partition(s).
+-R within a DSU guest system reboots into the DSU instead of the host system,
+this command would enable DSU (one-shot) if not already enabled.)"
+                  << std::endl;
+    }
 }
 
 const std::string system_mount_point(const android::fs_mgr::FstabEntry& entry) {
@@ -79,23 +98,32 @@
     return &(*it);
 }
 
-auto verbose = false;
+class MyLogger {
+  public:
+    explicit MyLogger(bool verbose) : verbose_(verbose) {}
 
-void MyLogger(android::base::LogId id, android::base::LogSeverity severity, const char* tag,
-              const char* file, unsigned int line, const char* message) {
-    if (verbose || severity == android::base::ERROR || message[0] != '[') {
-        fprintf(stderr, "%s\n", message);
+    void operator()(android::base::LogId id, android::base::LogSeverity severity, const char* tag,
+                    const char* file, unsigned int line, const char* message) {
+        // By default, print ERROR logs and logs of this program (does not start with '[')
+        // Print [libfs_mgr] INFO logs only if -v is given.
+        if (verbose_ || severity >= android::base::ERROR || message[0] != '[') {
+            fprintf(stderr, "%s\n", message);
+        }
+        logd_(id, severity, tag, file, line, message);
     }
-    static auto logd = android::base::LogdLogger();
-    logd(id, severity, tag, file, line, message);
-}
 
-[[noreturn]] void reboot() {
+  private:
+    android::base::LogdLogger logd_;
+    bool verbose_;
+};
+
+[[noreturn]] void reboot(const std::string& name) {
     LOG(INFO) << "Rebooting device for new settings to take effect";
     ::sync();
-    android::base::SetProperty(ANDROID_RB_PROPERTY, "reboot,remount");
+    android::base::SetProperty(ANDROID_RB_PROPERTY, "reboot," + name);
     ::sleep(60);
-    ::exit(0);  // SUCCESS
+    LOG(ERROR) << "Failed to reboot";
+    ::exit(1);
 }
 
 static android::sp<android::os::IVold> GetVold() {
@@ -111,21 +139,6 @@
     }
 }
 
-}  // namespace
-
-enum RemountStatus {
-    REMOUNT_SUCCESS = 0,
-    UNKNOWN_PARTITION = 5,
-    INVALID_PARTITION,
-    VERITY_PARTITION,
-    BAD_OVERLAY,
-    NO_MOUNTS,
-    REMOUNT_FAILED,
-    BINDER_ERROR,
-    CHECKPOINTING,
-    GSID_ERROR,
-};
-
 static bool ReadFstab(const char* fstab_file, android::fs_mgr::Fstab* fstab) {
     if (fstab_file) {
         return android::fs_mgr::ReadFstabFromFile(fstab_file, fstab);
@@ -146,10 +159,10 @@
     return true;
 }
 
-static RemountStatus VerifyCheckpointing() {
+bool VerifyCheckpointing() {
     if (!android::base::GetBoolProperty("ro.virtual_ab.enabled", false) &&
         !android::base::GetBoolProperty("ro.virtual_ab.retrofit", false)) {
-        return REMOUNT_SUCCESS;
+        return true;
     }
 
     // Virtual A/B devices can use /data as backing storage; make sure we're
@@ -158,13 +171,13 @@
     bool checkpointing = false;
     if (!vold->isCheckpointing(&checkpointing).isOk()) {
         LOG(ERROR) << "Could not determine checkpointing status.";
-        return BINDER_ERROR;
+        return false;
     }
     if (checkpointing) {
         LOG(ERROR) << "Cannot use remount when a checkpoint is in progress.";
-        return CHECKPOINTING;
+        return false;
     }
-    return REMOUNT_SUCCESS;
+    return true;
 }
 
 static bool IsRemountable(Fstab& candidates, const FstabEntry& entry) {
@@ -221,8 +234,7 @@
     return partitions;
 }
 
-static RemountStatus GetRemountList(const Fstab& fstab, const std::vector<std::string>& argv,
-                                    Fstab* partitions) {
+bool GetRemountList(const Fstab& fstab, const std::vector<std::string>& argv, Fstab* partitions) {
     auto candidates = fs_mgr_overlayfs_candidate_list(fstab);
 
     for (const auto& arg : argv) {
@@ -234,7 +246,7 @@
         auto it = FindPartition(fstab, partition);
         if (it == fstab.end()) {
             LOG(ERROR) << "Unknown partition " << arg;
-            return UNKNOWN_PARTITION;
+            return false;
         }
 
         const FstabEntry* entry = &*it;
@@ -249,7 +261,7 @@
         if (!fs_mgr_overlayfs_already_mounted(entry->mount_point) &&
             !IsRemountable(candidates, *entry)) {
             LOG(ERROR) << "Invalid partition " << arg;
-            return INVALID_PARTITION;
+            return false;
         }
         if (GetEntryForMountPoint(partitions, entry->mount_point) != nullptr) {
             continue;
@@ -257,7 +269,7 @@
         partitions->emplace_back(*entry);
     }
 
-    return REMOUNT_SUCCESS;
+    return true;
 }
 
 struct RemountCheckResult {
@@ -268,43 +280,18 @@
     bool remounted_anything = false;
 };
 
-static RemountStatus CheckVerity(const FstabEntry& entry, RemountCheckResult* result) {
-    if (!fs_mgr_is_verity_enabled(entry)) {
-        return REMOUNT_SUCCESS;
-    }
-
-    std::unique_ptr<AvbOps, decltype(&::avb_ops_user_free)> ops(avb_ops_user_new(),
-                                                                &::avb_ops_user_free);
-    if (!ops) {
-        return VERITY_PARTITION;
-    }
-    if (!avb_user_verity_set(ops.get(), fs_mgr_get_slot_suffix().c_str(), false)) {
-        return VERITY_PARTITION;
-    }
-    result->disabled_verity = true;
-    result->reboot_later = true;
-    return REMOUNT_SUCCESS;
-}
-
-static RemountStatus CheckVerityAndOverlayfs(Fstab* partitions, RemountCheckResult* result) {
-    RemountStatus status = REMOUNT_SUCCESS;
+bool CheckOverlayfs(Fstab* partitions, RemountCheckResult* result) {
+    bool ok = true;
     for (auto it = partitions->begin(); it != partitions->end();) {
         auto& entry = *it;
         const auto& mount_point = entry.mount_point;
 
-        if (auto rv = CheckVerity(entry, result); rv != REMOUNT_SUCCESS) {
-            LOG(ERROR) << "Skipping verified partition " << mount_point << " for remount";
-            status = rv;
-            it = partitions->erase(it);
-            continue;
-        }
-
         if (fs_mgr_wants_overlayfs(&entry)) {
             bool want_reboot = false;
             bool force = result->disabled_verity;
-            if (!fs_mgr_overlayfs_setup(mount_point.c_str(), &want_reboot, force)) {
+            if (!fs_mgr_overlayfs_setup(*partitions, mount_point.c_str(), &want_reboot, force)) {
                 LOG(ERROR) << "Overlayfs setup for " << mount_point << " failed, skipping";
-                status = BAD_OVERLAY;
+                ok = false;
                 it = partitions->erase(it);
                 continue;
             }
@@ -316,45 +303,48 @@
         }
         it++;
     }
-    return status;
+    return ok;
 }
 
-static RemountStatus EnableDsuIfNeeded() {
+bool EnableDsuIfNeeded() {
     auto gsid = android::gsi::GetGsiService();
     if (!gsid) {
-        return REMOUNT_SUCCESS;
+        return true;
     }
 
     auto dsu_running = false;
     if (auto status = gsid->isGsiRunning(&dsu_running); !status.isOk()) {
         LOG(ERROR) << "Failed to get DSU running state: " << status;
-        return BINDER_ERROR;
+        return false;
     }
     auto dsu_enabled = false;
     if (auto status = gsid->isGsiEnabled(&dsu_enabled); !status.isOk()) {
         LOG(ERROR) << "Failed to get DSU enabled state: " << status;
-        return BINDER_ERROR;
+        return false;
     }
     if (dsu_running && !dsu_enabled) {
         std::string dsu_slot;
         if (auto status = gsid->getActiveDsuSlot(&dsu_slot); !status.isOk()) {
             LOG(ERROR) << "Failed to get active DSU slot: " << status;
-            return BINDER_ERROR;
+            return false;
         }
         LOG(INFO) << "DSU is running but disabled, enable DSU so that we stay within the "
                      "DSU guest system after reboot";
         int error = 0;
-        if (auto status = gsid->enableGsi(/* oneShot = */ true, dsu_slot, &error);
-            !status.isOk() || error != android::gsi::IGsiService::INSTALL_OK) {
-            LOG(ERROR) << "Failed to enable DSU: " << status << ", error code: " << error;
-            return !status.isOk() ? BINDER_ERROR : GSID_ERROR;
+        if (auto status = gsid->enableGsi(/* oneShot = */ true, dsu_slot, &error); !status.isOk()) {
+            LOG(ERROR) << "Failed to enable DSU: " << status;
+            return false;
+        }
+        if (error != android::gsi::IGsiService::INSTALL_OK) {
+            LOG(ERROR) << "Failed to enable DSU, error code: " << error;
+            return false;
         }
         LOG(INFO) << "Successfully enabled DSU (one-shot mode)";
     }
-    return REMOUNT_SUCCESS;
+    return true;
 }
 
-static RemountStatus RemountPartition(Fstab& fstab, Fstab& mounts, FstabEntry& entry) {
+bool RemountPartition(Fstab& fstab, Fstab& mounts, FstabEntry& entry) {
     // unlock the r/o key for the mount point device
     if (entry.fs_mgr_flags.logical) {
         fs_mgr_update_logical_partition(&entry);
@@ -381,7 +371,7 @@
     }
     if (!found) {
         PLOG(INFO) << "skip unmounted partition dev:" << blk_device << " mnt:" << mount_point;
-        return REMOUNT_SUCCESS;
+        return true;
     }
     if (blk_device == "/dev/root") {
         auto from_fstab = GetEntryForMountPoint(&fstab, mount_point);
@@ -396,41 +386,133 @@
     }
 
     // Now remount!
-    if (::mount(blk_device.c_str(), mount_point.c_str(), entry.fs_type.c_str(), MS_REMOUNT,
-                nullptr) == 0) {
-        return REMOUNT_SUCCESS;
-    }
-    if ((errno == EINVAL) && (mount_point != entry.mount_point)) {
-        mount_point = entry.mount_point;
-        if (::mount(blk_device.c_str(), mount_point.c_str(), entry.fs_type.c_str(), MS_REMOUNT,
+    for (const auto& mnt_point : {mount_point, entry.mount_point}) {
+        if (::mount(blk_device.c_str(), mnt_point.c_str(), entry.fs_type.c_str(), MS_REMOUNT,
                     nullptr) == 0) {
-            return REMOUNT_SUCCESS;
+            LOG(INFO) << "Remounted " << mnt_point << " as RW";
+            return true;
+        }
+        if (errno != EINVAL || mount_point == entry.mount_point) {
+            break;
         }
     }
 
     PLOG(ERROR) << "failed to remount partition dev:" << blk_device << " mnt:" << mount_point;
-    return REMOUNT_FAILED;
+    return false;
 }
 
-static int do_remount(Fstab& fstab, const std::vector<std::string>& partition_args,
-                      RemountCheckResult* check_result) {
+struct SetVerityStateResult {
+    bool success = false;
+    bool want_reboot = false;
+};
+
+SetVerityStateResult SetVerityState(bool enable_verity) {
+    const auto ab_suffix = android::base::GetProperty("ro.boot.slot_suffix", "");
+    std::unique_ptr<AvbOps, decltype(&avb_ops_user_free)> ops(avb_ops_user_new(),
+                                                              &avb_ops_user_free);
+    if (!ops) {
+        LOG(ERROR) << "Error getting AVB ops";
+        return {};
+    }
+    if (!avb_user_verity_set(ops.get(), ab_suffix.c_str(), enable_verity)) {
+        LOG(ERROR) << "Error setting verity state";
+        return {};
+    }
+    bool verification_enabled = false;
+    if (!avb_user_verification_get(ops.get(), ab_suffix.c_str(), &verification_enabled)) {
+        LOG(ERROR) << "Error getting verification state";
+        return {};
+    }
+    if (!verification_enabled) {
+        LOG(WARNING) << "AVB verification is disabled, "
+                     << (enable_verity ? "enabling" : "disabling")
+                     << " verity state may have no effect";
+        return {.success = true, .want_reboot = false};
+    }
+    const auto verity_mode = android::base::GetProperty("ro.boot.veritymode", "");
+    const bool was_enabled = (verity_mode != "disabled");
+    if ((was_enabled && enable_verity) || (!was_enabled && !enable_verity)) {
+        LOG(INFO) << "Verity is already " << (enable_verity ? "enabled" : "disabled");
+        return {.success = true, .want_reboot = false};
+    }
+    LOG(INFO) << "Successfully " << (enable_verity ? "enabled" : "disabled") << " verity";
+    return {.success = true, .want_reboot = true};
+}
+
+bool SetupOrTeardownOverlayfs(bool enable) {
+    bool want_reboot = false;
+    if (enable) {
+        Fstab fstab;
+        if (!ReadDefaultFstab(&fstab)) {
+            LOG(ERROR) << "Could not read fstab.";
+            return want_reboot;
+        }
+        if (!fs_mgr_overlayfs_setup(fstab, nullptr, &want_reboot)) {
+            LOG(ERROR) << "Overlayfs setup failed.";
+            return want_reboot;
+        }
+        if (want_reboot) {
+            printf("enabling overlayfs\n");
+        }
+    } else {
+        auto rv = fs_mgr_overlayfs_teardown(nullptr, &want_reboot);
+        if (rv == OverlayfsTeardownResult::Error) {
+            LOG(ERROR) << "Overlayfs teardown failed.";
+            return want_reboot;
+        }
+        if (rv == OverlayfsTeardownResult::Busy) {
+            LOG(ERROR) << "Overlayfs is still active until reboot.";
+            return true;
+        }
+        if (want_reboot) {
+            printf("disabling overlayfs\n");
+        }
+    }
+    return want_reboot;
+}
+
+bool do_remount(Fstab& fstab, const std::vector<std::string>& partition_args,
+                RemountCheckResult* check_result) {
     Fstab partitions;
     if (partition_args.empty()) {
         partitions = GetAllRemountablePartitions(fstab);
     } else {
-        if (auto rv = GetRemountList(fstab, partition_args, &partitions); rv != REMOUNT_SUCCESS) {
-            return rv;
+        if (!GetRemountList(fstab, partition_args, &partitions)) {
+            return false;
         }
     }
 
-    // Check verity and optionally setup overlayfs backing.
-    auto retval = CheckVerityAndOverlayfs(&partitions, check_result);
+    // Disable verity.
+    auto verity_result = SetVerityState(false /* enable_verity */);
+
+    // Treat error as fatal and suggest reboot only if verity is enabled.
+    // TODO(b/260041315): We check the device mapper for any "<partition>-verity" device present
+    // instead of checking ro.boot.veritymode because emulator has incorrect property value.
+    bool must_disable_verity = false;
+    for (const auto& partition : partitions) {
+        if (fs_mgr_is_verity_enabled(partition)) {
+            must_disable_verity = true;
+            break;
+        }
+    }
+    if (must_disable_verity) {
+        if (!verity_result.success) {
+            return false;
+        }
+        if (verity_result.want_reboot) {
+            check_result->reboot_later = true;
+            check_result->disabled_verity = true;
+        }
+    }
+
+    // Optionally setup overlayfs backing.
+    bool ok = CheckOverlayfs(&partitions, check_result);
 
     if (partitions.empty() || check_result->disabled_verity) {
         if (partitions.empty()) {
             LOG(WARNING) << "No remountable partitions were found.";
         }
-        return retval;
+        return ok;
     }
 
     // Mount overlayfs.
@@ -443,51 +525,35 @@
     android::fs_mgr::Fstab mounts;
     if (!android::fs_mgr::ReadFstabFromFile("/proc/mounts", &mounts) || mounts.empty()) {
         PLOG(ERROR) << "Failed to read /proc/mounts";
-        return NO_MOUNTS;
+        return false;
     }
 
     // Remount selected partitions.
     for (auto& entry : partitions) {
-        if (auto rv = RemountPartition(fstab, mounts, entry); rv != REMOUNT_SUCCESS) {
-            retval = rv;
-        } else {
+        if (RemountPartition(fstab, mounts, entry)) {
             check_result->remounted_anything = true;
+        } else {
+            ok = false;
         }
     }
-    return retval;
+    return ok;
 }
 
+}  // namespace
+
 int main(int argc, char* argv[]) {
     // Do not use MyLogger() when running as clean_scratch_files, as stdout/stderr of daemon process
     // are discarded.
     if (argc > 0 && android::base::Basename(argv[0]) == "clean_scratch_files"s) {
         android::fs_mgr::CleanupOldScratchFiles();
-        return 0;
+        return EXIT_SUCCESS;
     }
 
-    android::base::InitLogging(argv, MyLogger);
-
-    // Make sure we are root.
-    if (::getuid() != 0) {
-        LOG(ERROR) << "Not running as root. Try \"adb root\" first.";
-        return 1;
-    }
-
-    // If somehow this executable is delivered on a "user" build, it can
-    // not function, so providing a clear message to the caller rather than
-    // letting if fall through and provide a lot of confusing failure messages.
-    if (!ALLOW_ADBD_DISABLE_VERITY || !android::base::GetBoolProperty("ro.debuggable", false)) {
-        LOG(ERROR) << "Device must be userdebug build";
-        return 1;
-    }
-
-    if (android::base::GetProperty("ro.boot.vbmeta.device_state", "") == "locked") {
-        LOG(ERROR) << "Device must be bootloader unlocked";
-        return 1;
-    }
+    android::base::InitLogging(argv, MyLogger(false /* verbose */));
 
     const char* fstab_file = nullptr;
-    auto auto_reboot = false;
+    bool auto_reboot = false;
+    bool verbose = false;
     std::vector<std::string> partition_args;
 
     struct option longopts[] = {
@@ -501,15 +567,15 @@
         switch (opt) {
             case 'h':
                 usage();
-                return 0;
+                return EXIT_SUCCESS;
             case 'R':
                 auto_reboot = true;
                 break;
             case 'T':
                 if (fstab_file) {
-                    LOG(ERROR) << "Cannot supply two fstabs: -T " << fstab_file << " -T" << optarg;
+                    LOG(ERROR) << "Cannot supply two fstabs: -T " << fstab_file << " -T " << optarg;
                     usage();
-                    return 1;
+                    return EXIT_FAILURE;
                 }
                 fstab_file = optarg;
                 break;
@@ -517,30 +583,92 @@
                 verbose = true;
                 break;
             default:
-                LOG(ERROR) << "Bad Argument -" << char(opt);
+                LOG(ERROR) << "Bad argument -" << char(opt);
                 usage();
-                return 1;
+                return EXIT_FAILURE;
         }
     }
 
-    for (; argc > optind; ++optind) {
-        partition_args.emplace_back(argv[optind]);
+    if (verbose) {
+        android::base::SetLogger(MyLogger(verbose));
+    }
+
+    bool remount = false;
+    bool enable_verity = false;
+    const std::string progname = getprogname();
+    if (progname == "enable-verity") {
+        enable_verity = true;
+    } else if (progname == "disable-verity") {
+        enable_verity = false;
+    } else if (progname == "set-verity-state") {
+        if (optind < argc && (argv[optind] == "1"s || argv[optind] == "0"s)) {
+            enable_verity = (argv[optind] == "1"s);
+        } else {
+            usage();
+            return EXIT_FAILURE;
+        }
+    } else {
+        remount = true;
+        for (; optind < argc; ++optind) {
+            partition_args.emplace_back(argv[optind]);
+        }
+    }
+
+    // Make sure we are root.
+    if (::getuid() != 0) {
+        LOG(ERROR) << "Not running as root. Try \"adb root\" first.";
+        return EXIT_FAILURE;
+    }
+
+    // If somehow this executable is delivered on a "user" build, it can
+    // not function, so providing a clear message to the caller rather than
+    // letting if fall through and provide a lot of confusing failure messages.
+    if (!ALLOW_ADBD_DISABLE_VERITY || !android::base::GetBoolProperty("ro.debuggable", false)) {
+        LOG(ERROR) << "Device must be userdebug build";
+        return EXIT_FAILURE;
+    }
+
+    if (android::base::GetProperty("ro.boot.verifiedbootstate", "") != "orange") {
+        LOG(ERROR) << "Device must be bootloader unlocked";
+        return EXIT_FAILURE;
+    }
+
+    // Start a threadpool to service waitForService() callbacks as
+    // fs_mgr_overlayfs_* might call waitForService() to get the image service.
+    android::ProcessState::self()->startThreadPool();
+
+    if (!remount) {
+        auto ret = SetVerityState(enable_verity);
+
+        // Disable any overlayfs unconditionally if we want verity enabled.
+        // Enable overlayfs only if verity is successfully disabled or is already disabled.
+        if (enable_verity || ret.success) {
+            ret.want_reboot |= SetupOrTeardownOverlayfs(!enable_verity);
+        }
+
+        if (ret.want_reboot) {
+            if (auto_reboot) {
+                reboot(progname);
+            }
+            std::cout << "Reboot the device for new settings to take effect" << std::endl;
+        }
+        return ret.success ? EXIT_SUCCESS : EXIT_FAILURE;
     }
 
     // Make sure checkpointing is disabled if necessary.
-    if (auto rv = VerifyCheckpointing(); rv != REMOUNT_SUCCESS) {
-        return rv;
+    if (!VerifyCheckpointing()) {
+        return EXIT_FAILURE;
     }
 
     // Read the selected fstab.
     Fstab fstab;
     if (!ReadFstab(fstab_file, &fstab) || fstab.empty()) {
         PLOG(ERROR) << "Failed to read fstab";
-        return 1;
+        return EXIT_FAILURE;
     }
 
     RemountCheckResult check_result;
-    int result = do_remount(fstab, partition_args, &check_result);
+    bool remount_success = do_remount(fstab, partition_args, &check_result);
 
     if (check_result.disabled_verity && check_result.setup_overlayfs) {
         LOG(INFO) << "Verity disabled; overlayfs enabled.";
@@ -549,27 +677,26 @@
     } else if (check_result.setup_overlayfs) {
         LOG(INFO) << "Overlayfs enabled.";
     }
-
+    if (remount_success && check_result.remounted_anything) {
+        LOG(INFO) << "Remount succeeded";
+    } else if (!remount_success) {
+        LOG(ERROR) << "Remount failed";
+    }
     if (check_result.reboot_later) {
         if (auto_reboot) {
             // If (1) remount requires a reboot to take effect, (2) system is currently
             // running a DSU guest and (3) DSU is disabled, then enable DSU so that the
             // next reboot would not take us back to the host system but stay within
             // the guest system.
-            if (auto rv = EnableDsuIfNeeded(); rv != REMOUNT_SUCCESS) {
+            if (!EnableDsuIfNeeded()) {
                 LOG(ERROR) << "Unable to automatically enable DSU";
-                return rv;
+                return EXIT_FAILURE;
             }
-            reboot();
+            reboot("remount");
         } else {
             LOG(INFO) << "Now reboot your device for settings to take effect";
         }
-        return REMOUNT_SUCCESS;
+        return EXIT_SUCCESS;
     }
-    if (result == REMOUNT_SUCCESS) {
-        printf("remount succeeded\n");
-    } else {
-        printf("remount failed\n");
-    }
-    return result;
+    return remount_success ? EXIT_SUCCESS : EXIT_FAILURE;
 }
diff --git a/fs_mgr/fuzz/fs_mgr_fstab_fuzzer.cpp b/fs_mgr/fuzz/fs_mgr_fstab_fuzzer.cpp
index 6a8a191..b5fdad4 100644
--- a/fs_mgr/fuzz/fs_mgr_fstab_fuzzer.cpp
+++ b/fs_mgr/fuzz/fs_mgr_fstab_fuzzer.cpp
@@ -14,13 +14,27 @@
 // limitations under the License.
 //
 
-#include <cstdio>
+#include <string>
+#include <vector>
 
 #include <fstab/fstab.h>
+#include <fuzzer/FuzzedDataProvider.h>
 
 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
-    std::string make_fstab_str(reinterpret_cast<const char*>(data), size);
+    FuzzedDataProvider fdp(data, size);
+
+    std::string make_fstab_str = fdp.ConsumeRandomLengthString();
+    std::string dsu_slot = fdp.ConsumeRandomLengthString(30);
+    std::vector<std::string> dsu_partitions = {
+            fdp.ConsumeRandomLengthString(30),
+            fdp.ConsumeRandomLengthString(30),
+    };
+    std::string skip_mount_config = fdp.ConsumeRemainingBytesAsString();
+
     android::fs_mgr::Fstab fstab;
     android::fs_mgr::ParseFstabFromString(make_fstab_str, /* proc_mounts = */ false, &fstab);
+    android::fs_mgr::TransformFstabForDsu(&fstab, dsu_slot, dsu_partitions);
+    android::fs_mgr::SkipMountWithConfig(skip_mount_config, &fstab, /* verbose = */ false);
+
     return 0;
 }
diff --git a/fs_mgr/include/fs_mgr.h b/fs_mgr/include/fs_mgr.h
index 29a5e60..43de6d8 100644
--- a/fs_mgr/include/fs_mgr.h
+++ b/fs_mgr/include/fs_mgr.h
@@ -71,6 +71,8 @@
     std::string algorithm;
     // The root digest of the merkle tree.
     std::string root_digest;
+    // If check_at_most_once is enabled.
+    bool check_at_most_once;
 };
 
 // fs_mgr_mount_all() updates fstab entries that reference device-mapper.
diff --git a/fs_mgr/include_fstab/fstab/fstab.h b/fs_mgr/include_fstab/fstab/fstab.h
index 689d18b..a914b53 100644
--- a/fs_mgr/include_fstab/fstab/fstab.h
+++ b/fs_mgr/include_fstab/fstab/fstab.h
@@ -97,16 +97,21 @@
 bool ParseFstabFromString(const std::string& fstab_str, bool proc_mounts, Fstab* fstab_out);
 // Exported for testability. Regular users should use ReadDefaultFstab().
 std::string GetFstabPath();
+// Exported for testability.
+bool SkipMountWithConfig(const std::string& skip_config, Fstab* fstab, bool verbose);
 
 bool ReadFstabFromFile(const std::string& path, Fstab* fstab);
 bool ReadFstabFromDt(Fstab* fstab, bool verbose = true);
 bool ReadDefaultFstab(Fstab* fstab);
 bool SkipMountingPartitions(Fstab* fstab, bool verbose = false);
 
-FstabEntry* GetEntryForMountPoint(Fstab* fstab, const std::string& path);
 // The Fstab can contain multiple entries for the same mount point with different configurations.
 std::vector<FstabEntry*> GetEntriesForMountPoint(Fstab* fstab, const std::string& path);
 
+// Like GetEntriesForMountPoint() but return only the first entry or nullptr if no entry is found.
+FstabEntry* GetEntryForMountPoint(Fstab* fstab, const std::string& path);
+const FstabEntry* GetEntryForMountPoint(const Fstab* fstab, const std::string& path);
+
 // This method builds DSU fstab entries and transfer the fstab.
 //
 // fstab points to the unmodified fstab.
diff --git a/fs_mgr/libdm/dm.cpp b/fs_mgr/libdm/dm.cpp
index 4034e30..deffae1 100644
--- a/fs_mgr/libdm/dm.cpp
+++ b/fs_mgr/libdm/dm.cpp
@@ -20,6 +20,7 @@
 #include <sys/ioctl.h>
 #include <sys/sysmacros.h>
 #include <sys/types.h>
+#include <sys/utsname.h>
 
 #include <chrono>
 #include <functional>
@@ -289,7 +290,7 @@
     return true;
 }
 
-bool DeviceMapper::LoadTableAndActivate(const std::string& name, const DmTable& table) {
+bool DeviceMapper::LoadTable(const std::string& name, const DmTable& table) {
     std::string ioctl_buffer(sizeof(struct dm_ioctl), 0);
     ioctl_buffer += table.Serialize();
 
@@ -305,9 +306,17 @@
         PLOG(ERROR) << "DM_TABLE_LOAD failed";
         return false;
     }
+    return true;
+}
 
-    InitIo(io, name);
-    if (ioctl(fd_, DM_DEV_SUSPEND, io)) {
+bool DeviceMapper::LoadTableAndActivate(const std::string& name, const DmTable& table) {
+    if (!LoadTable(name, table)) {
+        return false;
+    }
+
+    struct dm_ioctl io;
+    InitIo(&io, name);
+    if (ioctl(fd_, DM_DEV_SUSPEND, &io)) {
         PLOG(ERROR) << "DM_TABLE_SUSPEND resume failed";
         return false;
     }
@@ -703,5 +712,28 @@
     return dm_block_devices;
 }
 
+bool DeviceMapper::CreatePlaceholderDevice(const std::string& name) {
+    if (!CreateEmptyDevice(name)) {
+        return false;
+    }
+
+    struct utsname uts;
+    unsigned int major, minor;
+    if (uname(&uts) != 0 || sscanf(uts.release, "%u.%u", &major, &minor) != 2) {
+        LOG(ERROR) << "Could not parse the kernel version from uname";
+        return true;
+    }
+
+    // On Linux 5.15+, there is no uevent until DM_TABLE_LOAD.
+    if (major > 5 || (major == 5 && minor >= 15)) {
+        DmTable table;
+        table.Emplace<DmTargetError>(0, 1);
+        if (!LoadTable(name, table)) {
+            return false;
+        }
+    }
+    return true;
+}
+
 }  // namespace dm
 }  // namespace android
diff --git a/fs_mgr/libdm/dm_test.cpp b/fs_mgr/libdm/dm_test.cpp
index 541f254..4448d35 100644
--- a/fs_mgr/libdm/dm_test.cpp
+++ b/fs_mgr/libdm/dm_test.cpp
@@ -690,3 +690,23 @@
     // Empty device should be in suspended state.
     ASSERT_EQ(DmDeviceState::SUSPENDED, dm.GetState("empty-device"));
 }
+
+TEST(libdm, UeventAfterLoadTable) {
+    static const char* kDeviceName = "libmd-test-uevent-load-table";
+
+    DeviceMapper& dm = DeviceMapper::Instance();
+    ASSERT_TRUE(dm.CreateEmptyDevice(kDeviceName));
+
+    DmTable table;
+    table.Emplace<DmTargetError>(0, 1);
+    ASSERT_TRUE(dm.LoadTable(kDeviceName, table));
+
+    std::string ignore_path;
+    ASSERT_TRUE(dm.WaitForDevice(kDeviceName, 5s, &ignore_path));
+
+    auto info = dm.GetDetailedInfo(kDeviceName);
+    ASSERT_TRUE(info.has_value());
+    ASSERT_TRUE(info->IsSuspended());
+
+    ASSERT_TRUE(dm.DeleteDevice(kDeviceName));
+}
diff --git a/fs_mgr/libdm/include/libdm/dm.h b/fs_mgr/libdm/include/libdm/dm.h
index 1057d7f..dbef8f9 100644
--- a/fs_mgr/libdm/include/libdm/dm.h
+++ b/fs_mgr/libdm/include/libdm/dm.h
@@ -75,6 +75,7 @@
                               const std::chrono::milliseconds& timeout_ms) = 0;
     virtual DmDeviceState GetState(const std::string& name) const = 0;
     virtual bool LoadTableAndActivate(const std::string& name, const DmTable& table) = 0;
+    virtual bool LoadTable(const std::string& name, const DmTable& table) = 0;
     virtual bool GetTableInfo(const std::string& name, std::vector<TargetInfo>* table) = 0;
     virtual bool GetTableStatus(const std::string& name, std::vector<TargetInfo>* table) = 0;
     virtual bool GetDmDevicePathByName(const std::string& name, std::string* path) = 0;
@@ -116,7 +117,7 @@
         bool IsBufferFull() const { return flags_ & DM_BUFFER_FULL_FLAG; }
         bool IsInactiveTablePresent() const { return flags_ & DM_INACTIVE_PRESENT_FLAG; }
         bool IsReadOnly() const { return flags_ & DM_READONLY_FLAG; }
-        bool IsSuspended() const { return flags_ & DM_SUSPEND_FLAG; }
+        bool IsSuspended() const { return !IsActiveTablePresent() || (flags_ & DM_SUSPEND_FLAG); }
     };
 
     // Removes a device mapper device with the given name.
@@ -199,6 +200,12 @@
     // Returns 'true' on success, false otherwise.
     bool LoadTableAndActivate(const std::string& name, const DmTable& table) override;
 
+    // Same as LoadTableAndActivate, but there is no resume step. This puts the
+    // new table in the inactive slot.
+    //
+    // Returns 'true' on success, false otherwise.
+    bool LoadTable(const std::string& name, const DmTable& table) override;
+
     // Returns true if a list of available device mapper targets registered in the kernel was
     // successfully read and stored in 'targets'. Returns 'false' otherwise.
     bool GetAvailableTargets(std::vector<DmTargetTypeInfo>* targets);
@@ -285,6 +292,12 @@
     // Returns mapping <partition-name, /dev/block/dm-x>
     std::map<std::string, std::string> FindDmPartitions();
 
+    // Create a placeholder device. This is useful for ensuring that a uevent is in the pipeline,
+    // to reduce the amount of time a future WaitForDevice will block. On kernels < 5.15, this
+    // simply calls CreateEmptyDevice. On 5.15 and higher, it also loads (but does not activate)
+    // a placeholder table containing dm-error.
+    bool CreatePlaceholderDevice(const std::string& name);
+
   private:
     // Maximum possible device mapper targets registered in the kernel.
     // This is only used to read the list of targets from kernel so we allocate
diff --git a/fs_mgr/libdm/include/libdm/dm_table.h b/fs_mgr/libdm/include/libdm/dm_table.h
index ee66653..427f34d 100644
--- a/fs_mgr/libdm/include/libdm/dm_table.h
+++ b/fs_mgr/libdm/include/libdm/dm_table.h
@@ -31,6 +31,7 @@
 class DmTable {
   public:
     DmTable() : num_sectors_(0), readonly_(false) {}
+    DmTable(DmTable&& other) = default;
 
     // Adds a target to the device mapper table for a range specified in the target object.
     // The function will return 'true' if the target was successfully added and doesn't overlap with
@@ -70,6 +71,8 @@
     void set_readonly(bool readonly) { readonly_ = readonly; }
     bool readonly() const { return readonly_; }
 
+    DmTable& operator=(DmTable&& other) = default;
+
     ~DmTable() = default;
 
   private:
diff --git a/fs_mgr/libdm/include/libdm/dm_target.h b/fs_mgr/libdm/include/libdm/dm_target.h
index 9543058..09fe200 100644
--- a/fs_mgr/libdm/include/libdm/dm_target.h
+++ b/fs_mgr/libdm/include/libdm/dm_target.h
@@ -323,6 +323,14 @@
     std::string control_device_;
 };
 
+class DmTargetError final : public DmTarget {
+  public:
+    DmTargetError(uint64_t start, uint64_t length) : DmTarget(start, length) {}
+
+    std::string name() const override { return "error"; }
+    std::string GetParameterString() const override { return ""; }
+};
+
 }  // namespace dm
 }  // namespace android
 
diff --git a/fs_mgr/libsnapshot/Android.bp b/fs_mgr/libsnapshot/Android.bp
index d5e85e6..2165961 100644
--- a/fs_mgr/libsnapshot/Android.bp
+++ b/fs_mgr/libsnapshot/Android.bp
@@ -173,10 +173,11 @@
         "libsnapshot_cow_defaults",
     ],
     srcs: [
-        "cow_decompress.cpp",
-        "cow_reader.cpp",
-        "cow_writer.cpp",
-        "cow_format.cpp",
+        "libsnapshot_cow/cow_decompress.cpp",
+        "libsnapshot_cow/cow_reader.cpp",
+        "libsnapshot_cow/cow_writer.cpp",
+        "libsnapshot_cow/cow_format.cpp",
+        "libsnapshot_cow/cow_compress.cpp",
     ],
     host_supported: true,
     recovery_available: true,
@@ -260,6 +261,7 @@
     },
     auto_gen_config: true,
     require_root: true,
+    compile_multilib: "first",
 }
 
 cc_test {
@@ -323,6 +325,22 @@
         "libstatslog",
         "libutils",
     ],
+    header_libs: [
+        "libstorage_literals_headers",
+    ],
+    product_variables: {
+        debuggable: {
+            cppflags: [
+                "-DSNAPSHOTCTL_USERDEBUG_OR_ENG",
+            ],
+            shared_libs: [
+                "android.hardware.boot@1.0",
+                "android.hardware.boot@1.1",
+                "android.hardware.boot-V1-ndk",
+                "libboot_control_client",
+            ],
+        },
+    },
 }
 
 cc_test {
@@ -424,7 +442,7 @@
         "libsnapshot_cow_defaults",
     ],
     srcs: [
-        "cow_api_test.cpp",
+        "libsnapshot_cow/cow_api_test.cpp",
     ],
     cflags: [
         "-D_FILE_OFFSET_BITS=64",
@@ -546,7 +564,7 @@
     shared_libs: [
     ],
     srcs: [
-        "inspect_cow.cpp",
+        "libsnapshot_cow/inspect_cow.cpp",
     ],
 }
 
diff --git a/fs_mgr/libsnapshot/cow_writer.cpp b/fs_mgr/libsnapshot/cow_writer.cpp
deleted file mode 100644
index 7281fc2..0000000
--- a/fs_mgr/libsnapshot/cow_writer.cpp
+++ /dev/null
@@ -1,634 +0,0 @@
-//
-// Copyright (C) 2020 The Android Open Source Project
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-
-#include <sys/types.h>
-#include <unistd.h>
-
-#include <limits>
-#include <queue>
-
-#include <android-base/file.h>
-#include <android-base/logging.h>
-#include <android-base/unique_fd.h>
-#include <brotli/encode.h>
-#include <libsnapshot/cow_format.h>
-#include <libsnapshot/cow_reader.h>
-#include <libsnapshot/cow_writer.h>
-#include <lz4.h>
-#include <zlib.h>
-
-namespace android {
-namespace snapshot {
-
-static_assert(sizeof(off_t) == sizeof(uint64_t));
-
-using android::base::borrowed_fd;
-using android::base::unique_fd;
-
-bool ICowWriter::AddCopy(uint64_t new_block, uint64_t old_block) {
-    if (!ValidateNewBlock(new_block)) {
-        return false;
-    }
-    return EmitCopy(new_block, old_block);
-}
-
-bool ICowWriter::AddRawBlocks(uint64_t new_block_start, const void* data, size_t size) {
-    if (size % options_.block_size != 0) {
-        LOG(ERROR) << "AddRawBlocks: size " << size << " is not a multiple of "
-                   << options_.block_size;
-        return false;
-    }
-
-    uint64_t num_blocks = size / options_.block_size;
-    uint64_t last_block = new_block_start + num_blocks - 1;
-    if (!ValidateNewBlock(last_block)) {
-        return false;
-    }
-    return EmitRawBlocks(new_block_start, data, size);
-}
-
-bool ICowWriter::AddXorBlocks(uint32_t new_block_start, const void* data, size_t size,
-                              uint32_t old_block, uint16_t offset) {
-    if (size % options_.block_size != 0) {
-        LOG(ERROR) << "AddRawBlocks: size " << size << " is not a multiple of "
-                   << options_.block_size;
-        return false;
-    }
-
-    uint64_t num_blocks = size / options_.block_size;
-    uint64_t last_block = new_block_start + num_blocks - 1;
-    if (!ValidateNewBlock(last_block)) {
-        return false;
-    }
-    if (offset >= options_.block_size) {
-        LOG(ERROR) << "AddXorBlocks: offset " << offset << " is not less than "
-                   << options_.block_size;
-    }
-    return EmitXorBlocks(new_block_start, data, size, old_block, offset);
-}
-
-bool ICowWriter::AddZeroBlocks(uint64_t new_block_start, uint64_t num_blocks) {
-    uint64_t last_block = new_block_start + num_blocks - 1;
-    if (!ValidateNewBlock(last_block)) {
-        return false;
-    }
-    return EmitZeroBlocks(new_block_start, num_blocks);
-}
-
-bool ICowWriter::AddLabel(uint64_t label) {
-    return EmitLabel(label);
-}
-
-bool ICowWriter::AddSequenceData(size_t num_ops, const uint32_t* data) {
-    return EmitSequenceData(num_ops, data);
-}
-
-bool ICowWriter::ValidateNewBlock(uint64_t new_block) {
-    if (options_.max_blocks && new_block >= options_.max_blocks.value()) {
-        LOG(ERROR) << "New block " << new_block << " exceeds maximum block count "
-                   << options_.max_blocks.value();
-        return false;
-    }
-    return true;
-}
-
-CowWriter::CowWriter(const CowOptions& options) : ICowWriter(options), fd_(-1) {
-    SetupHeaders();
-}
-
-void CowWriter::SetupHeaders() {
-    header_ = {};
-    header_.magic = kCowMagicNumber;
-    header_.major_version = kCowVersionMajor;
-    header_.minor_version = kCowVersionMinor;
-    header_.header_size = sizeof(CowHeader);
-    header_.footer_size = sizeof(CowFooter);
-    header_.op_size = sizeof(CowOperation);
-    header_.block_size = options_.block_size;
-    header_.num_merge_ops = options_.num_merge_ops;
-    header_.cluster_ops = options_.cluster_ops;
-    header_.buffer_size = 0;
-    footer_ = {};
-    footer_.op.data_length = 64;
-    footer_.op.type = kCowFooterOp;
-}
-
-bool CowWriter::ParseOptions() {
-    if (options_.compression == "gz") {
-        compression_ = kCowCompressGz;
-    } else if (options_.compression == "brotli") {
-        compression_ = kCowCompressBrotli;
-    } else if (options_.compression == "lz4") {
-        compression_ = kCowCompressLz4;
-    } else if (options_.compression == "none") {
-        compression_ = kCowCompressNone;
-    } else if (!options_.compression.empty()) {
-        LOG(ERROR) << "unrecognized compression: " << options_.compression;
-        return false;
-    }
-    if (options_.cluster_ops == 1) {
-        LOG(ERROR) << "Clusters must contain at least two operations to function.";
-        return false;
-    }
-    return true;
-}
-
-bool CowWriter::SetFd(android::base::borrowed_fd fd) {
-    if (fd.get() < 0) {
-        owned_fd_.reset(open("/dev/null", O_RDWR | O_CLOEXEC));
-        if (owned_fd_ < 0) {
-            PLOG(ERROR) << "open /dev/null failed";
-            return false;
-        }
-        fd_ = owned_fd_;
-        is_dev_null_ = true;
-    } else {
-        fd_ = fd;
-
-        struct stat stat;
-        if (fstat(fd.get(), &stat) < 0) {
-            PLOG(ERROR) << "fstat failed";
-            return false;
-        }
-        is_block_device_ = S_ISBLK(stat.st_mode);
-    }
-    return true;
-}
-
-bool CowWriter::Initialize(unique_fd&& fd) {
-    owned_fd_ = std::move(fd);
-    return Initialize(borrowed_fd{owned_fd_});
-}
-
-bool CowWriter::Initialize(borrowed_fd fd) {
-    if (!SetFd(fd) || !ParseOptions()) {
-        return false;
-    }
-
-    return OpenForWrite();
-}
-
-bool CowWriter::InitializeAppend(android::base::unique_fd&& fd, uint64_t label) {
-    owned_fd_ = std::move(fd);
-    return InitializeAppend(android::base::borrowed_fd{owned_fd_}, label);
-}
-
-bool CowWriter::InitializeAppend(android::base::borrowed_fd fd, uint64_t label) {
-    if (!SetFd(fd) || !ParseOptions()) {
-        return false;
-    }
-
-    return OpenForAppend(label);
-}
-
-void CowWriter::InitPos() {
-    next_op_pos_ = sizeof(header_) + header_.buffer_size;
-    cluster_size_ = header_.cluster_ops * sizeof(CowOperation);
-    if (header_.cluster_ops) {
-        next_data_pos_ = next_op_pos_ + cluster_size_;
-    } else {
-        next_data_pos_ = next_op_pos_ + sizeof(CowOperation);
-    }
-    ops_.clear();
-    current_cluster_size_ = 0;
-    current_data_size_ = 0;
-}
-
-bool CowWriter::OpenForWrite() {
-    // This limitation is tied to the data field size in CowOperation.
-    if (header_.block_size > std::numeric_limits<uint16_t>::max()) {
-        LOG(ERROR) << "Block size is too large";
-        return false;
-    }
-
-    if (lseek(fd_.get(), 0, SEEK_SET) < 0) {
-        PLOG(ERROR) << "lseek failed";
-        return false;
-    }
-
-    if (options_.scratch_space) {
-        header_.buffer_size = BUFFER_REGION_DEFAULT_SIZE;
-    }
-
-    // Headers are not complete, but this ensures the file is at the right
-    // position.
-    if (!android::base::WriteFully(fd_, &header_, sizeof(header_))) {
-        PLOG(ERROR) << "write failed";
-        return false;
-    }
-
-    if (options_.scratch_space) {
-        // Initialize the scratch space
-        std::string data(header_.buffer_size, 0);
-        if (!android::base::WriteFully(fd_, data.data(), header_.buffer_size)) {
-            PLOG(ERROR) << "writing scratch space failed";
-            return false;
-        }
-    }
-
-    if (!Sync()) {
-        LOG(ERROR) << "Header sync failed";
-        return false;
-    }
-
-    if (lseek(fd_.get(), sizeof(header_) + header_.buffer_size, SEEK_SET) < 0) {
-        PLOG(ERROR) << "lseek failed";
-        return false;
-    }
-
-    InitPos();
-
-    return true;
-}
-
-bool CowWriter::OpenForAppend(uint64_t label) {
-    auto reader = std::make_unique<CowReader>();
-    std::queue<CowOperation> toAdd;
-
-    if (!reader->Parse(fd_, {label}) || !reader->GetHeader(&header_)) {
-        return false;
-    }
-
-    options_.block_size = header_.block_size;
-    options_.cluster_ops = header_.cluster_ops;
-
-    // Reset this, since we're going to reimport all operations.
-    footer_.op.num_ops = 0;
-    InitPos();
-
-    auto iter = reader->GetOpIter();
-
-    while (!iter->Done()) {
-        AddOperation(iter->Get());
-        iter->Next();
-    }
-
-    // Free reader so we own the descriptor position again.
-    reader = nullptr;
-
-    if (lseek(fd_.get(), next_op_pos_, SEEK_SET) < 0) {
-        PLOG(ERROR) << "lseek failed";
-        return false;
-    }
-    return EmitClusterIfNeeded();
-}
-
-bool CowWriter::EmitCopy(uint64_t new_block, uint64_t old_block) {
-    CHECK(!merge_in_progress_);
-    CowOperation op = {};
-    op.type = kCowCopyOp;
-    op.new_block = new_block;
-    op.source = old_block;
-    return WriteOperation(op);
-}
-
-bool CowWriter::EmitRawBlocks(uint64_t new_block_start, const void* data, size_t size) {
-    return EmitBlocks(new_block_start, data, size, 0, 0, kCowReplaceOp);
-}
-
-bool CowWriter::EmitXorBlocks(uint32_t new_block_start, const void* data, size_t size,
-                              uint32_t old_block, uint16_t offset) {
-    return EmitBlocks(new_block_start, data, size, old_block, offset, kCowXorOp);
-}
-
-bool CowWriter::EmitBlocks(uint64_t new_block_start, const void* data, size_t size,
-                           uint64_t old_block, uint16_t offset, uint8_t type) {
-    const uint8_t* iter = reinterpret_cast<const uint8_t*>(data);
-    CHECK(!merge_in_progress_);
-    for (size_t i = 0; i < size / header_.block_size; i++) {
-        CowOperation op = {};
-        op.new_block = new_block_start + i;
-        op.type = type;
-        if (type == kCowXorOp) {
-            op.source = (old_block + i) * header_.block_size + offset;
-        } else {
-            op.source = next_data_pos_;
-        }
-
-        if (compression_) {
-            auto data = Compress(iter, header_.block_size);
-            if (data.empty()) {
-                PLOG(ERROR) << "AddRawBlocks: compression failed";
-                return false;
-            }
-            if (data.size() > std::numeric_limits<uint16_t>::max()) {
-                LOG(ERROR) << "Compressed block is too large: " << data.size() << " bytes";
-                return false;
-            }
-            op.compression = compression_;
-            op.data_length = static_cast<uint16_t>(data.size());
-
-            if (!WriteOperation(op, data.data(), data.size())) {
-                PLOG(ERROR) << "AddRawBlocks: write failed";
-                return false;
-            }
-        } else {
-            op.data_length = static_cast<uint16_t>(header_.block_size);
-            if (!WriteOperation(op, iter, header_.block_size)) {
-                PLOG(ERROR) << "AddRawBlocks: write failed";
-                return false;
-            }
-        }
-
-        iter += header_.block_size;
-    }
-    return true;
-}
-
-bool CowWriter::EmitZeroBlocks(uint64_t new_block_start, uint64_t num_blocks) {
-    CHECK(!merge_in_progress_);
-    for (uint64_t i = 0; i < num_blocks; i++) {
-        CowOperation op = {};
-        op.type = kCowZeroOp;
-        op.new_block = new_block_start + i;
-        op.source = 0;
-        WriteOperation(op);
-    }
-    return true;
-}
-
-bool CowWriter::EmitLabel(uint64_t label) {
-    CHECK(!merge_in_progress_);
-    CowOperation op = {};
-    op.type = kCowLabelOp;
-    op.source = label;
-    return WriteOperation(op) && Sync();
-}
-
-bool CowWriter::EmitSequenceData(size_t num_ops, const uint32_t* data) {
-    CHECK(!merge_in_progress_);
-    size_t to_add = 0;
-    size_t max_ops = std::numeric_limits<uint16_t>::max() / sizeof(uint32_t);
-    while (num_ops > 0) {
-        CowOperation op = {};
-        op.type = kCowSequenceOp;
-        op.source = next_data_pos_;
-        to_add = std::min(num_ops, max_ops);
-        op.data_length = static_cast<uint16_t>(to_add * sizeof(uint32_t));
-        if (!WriteOperation(op, data, op.data_length)) {
-            PLOG(ERROR) << "AddSequenceData: write failed";
-            return false;
-        }
-        num_ops -= to_add;
-        data += to_add;
-    }
-    return true;
-}
-
-bool CowWriter::EmitCluster() {
-    CowOperation op = {};
-    op.type = kCowClusterOp;
-    // Next cluster starts after remainder of current cluster and the next data block.
-    op.source = current_data_size_ + cluster_size_ - current_cluster_size_ - sizeof(CowOperation);
-    return WriteOperation(op);
-}
-
-bool CowWriter::EmitClusterIfNeeded() {
-    // If there isn't room for another op and the cluster end op, end the current cluster
-    if (cluster_size_ && cluster_size_ < current_cluster_size_ + 2 * sizeof(CowOperation)) {
-        if (!EmitCluster()) return false;
-    }
-    return true;
-}
-
-std::basic_string<uint8_t> CowWriter::Compress(const void* data, size_t length) {
-    switch (compression_) {
-        case kCowCompressGz: {
-            const auto bound = compressBound(length);
-            std::basic_string<uint8_t> buffer(bound, '\0');
-
-            uLongf dest_len = bound;
-            auto rv = compress2(buffer.data(), &dest_len, reinterpret_cast<const Bytef*>(data),
-                                length, Z_BEST_COMPRESSION);
-            if (rv != Z_OK) {
-                LOG(ERROR) << "compress2 returned: " << rv;
-                return {};
-            }
-            buffer.resize(dest_len);
-            return buffer;
-        }
-        case kCowCompressBrotli: {
-            const auto bound = BrotliEncoderMaxCompressedSize(length);
-            if (!bound) {
-                LOG(ERROR) << "BrotliEncoderMaxCompressedSize returned 0";
-                return {};
-            }
-            std::basic_string<uint8_t> buffer(bound, '\0');
-
-            size_t encoded_size = bound;
-            auto rv = BrotliEncoderCompress(
-                    BROTLI_DEFAULT_QUALITY, BROTLI_DEFAULT_WINDOW, BROTLI_DEFAULT_MODE, length,
-                    reinterpret_cast<const uint8_t*>(data), &encoded_size, buffer.data());
-            if (!rv) {
-                LOG(ERROR) << "BrotliEncoderCompress failed";
-                return {};
-            }
-            buffer.resize(encoded_size);
-            return buffer;
-        }
-        case kCowCompressLz4: {
-            const auto bound = LZ4_compressBound(length);
-            if (!bound) {
-                LOG(ERROR) << "LZ4_compressBound returned 0";
-                return {};
-            }
-            std::basic_string<uint8_t> buffer(bound, '\0');
-
-            const auto compressed_size = LZ4_compress_default(
-                    static_cast<const char*>(data), reinterpret_cast<char*>(buffer.data()), length,
-                    buffer.size());
-            if (compressed_size <= 0) {
-                LOG(ERROR) << "LZ4_compress_default failed, input size: " << length
-                           << ", compression bound: " << bound << ", ret: " << compressed_size;
-                return {};
-            }
-            buffer.resize(compressed_size);
-            return buffer;
-        }
-        default:
-            LOG(ERROR) << "unhandled compression type: " << compression_;
-            break;
-    }
-    return {};
-}
-
-// TODO: Fix compilation issues when linking libcrypto library
-// when snapuserd is compiled as part of ramdisk.
-static void SHA256(const void*, size_t, uint8_t[]) {
-#if 0
-    SHA256_CTX c;
-    SHA256_Init(&c);
-    SHA256_Update(&c, data, length);
-    SHA256_Final(out, &c);
-#endif
-}
-
-bool CowWriter::Finalize() {
-    auto continue_cluster_size = current_cluster_size_;
-    auto continue_data_size = current_data_size_;
-    auto continue_data_pos = next_data_pos_;
-    auto continue_op_pos = next_op_pos_;
-    auto continue_size = ops_.size();
-    auto continue_num_ops = footer_.op.num_ops;
-    bool extra_cluster = false;
-
-    // Blank out extra ops, in case we're in append mode and dropped ops.
-    if (cluster_size_) {
-        auto unused_cluster_space = cluster_size_ - current_cluster_size_;
-        std::string clr;
-        clr.resize(unused_cluster_space, '\0');
-        if (lseek(fd_.get(), next_op_pos_, SEEK_SET) < 0) {
-            PLOG(ERROR) << "Failed to seek to footer position.";
-            return false;
-        }
-        if (!android::base::WriteFully(fd_, clr.data(), clr.size())) {
-            PLOG(ERROR) << "clearing unused cluster area failed";
-            return false;
-        }
-    }
-
-    // Footer should be at the end of a file, so if there is data after the current block, end it
-    // and start a new cluster.
-    if (cluster_size_ && current_data_size_ > 0) {
-        EmitCluster();
-        extra_cluster = true;
-    }
-
-    footer_.op.ops_size = ops_.size();
-    if (lseek(fd_.get(), next_op_pos_, SEEK_SET) < 0) {
-        PLOG(ERROR) << "Failed to seek to footer position.";
-        return false;
-    }
-    memset(&footer_.data.ops_checksum, 0, sizeof(uint8_t) * 32);
-    memset(&footer_.data.footer_checksum, 0, sizeof(uint8_t) * 32);
-
-    SHA256(ops_.data(), ops_.size(), footer_.data.ops_checksum);
-    SHA256(&footer_.op, sizeof(footer_.op), footer_.data.footer_checksum);
-    // Write out footer at end of file
-    if (!android::base::WriteFully(fd_, reinterpret_cast<const uint8_t*>(&footer_),
-                                   sizeof(footer_))) {
-        PLOG(ERROR) << "write footer failed";
-        return false;
-    }
-
-    // Remove excess data, if we're in append mode and threw away more data
-    // than we wrote before.
-    off_t offs = lseek(fd_.get(), 0, SEEK_CUR);
-    if (offs < 0) {
-        PLOG(ERROR) << "Failed to lseek to find current position";
-        return false;
-    }
-    if (!Truncate(offs)) {
-        return false;
-    }
-
-    // Reposition for additional Writing
-    if (extra_cluster) {
-        current_cluster_size_ = continue_cluster_size;
-        current_data_size_ = continue_data_size;
-        next_data_pos_ = continue_data_pos;
-        next_op_pos_ = continue_op_pos;
-        footer_.op.num_ops = continue_num_ops;
-        ops_.resize(continue_size);
-    }
-    return Sync();
-}
-
-uint64_t CowWriter::GetCowSize() {
-    if (current_data_size_ > 0) {
-        return next_data_pos_ + sizeof(footer_);
-    } else {
-        return next_op_pos_ + sizeof(footer_);
-    }
-}
-
-bool CowWriter::GetDataPos(uint64_t* pos) {
-    off_t offs = lseek(fd_.get(), 0, SEEK_CUR);
-    if (offs < 0) {
-        PLOG(ERROR) << "lseek failed";
-        return false;
-    }
-    *pos = offs;
-    return true;
-}
-
-bool CowWriter::WriteOperation(const CowOperation& op, const void* data, size_t size) {
-    if (lseek(fd_.get(), next_op_pos_, SEEK_SET) < 0) {
-        PLOG(ERROR) << "lseek failed for writing operation.";
-        return false;
-    }
-    if (!android::base::WriteFully(fd_, reinterpret_cast<const uint8_t*>(&op), sizeof(op))) {
-        return false;
-    }
-    if (data != nullptr && size > 0) {
-        if (!WriteRawData(data, size)) return false;
-    }
-    AddOperation(op);
-    return EmitClusterIfNeeded();
-}
-
-void CowWriter::AddOperation(const CowOperation& op) {
-    footer_.op.num_ops++;
-
-    if (op.type == kCowClusterOp) {
-        current_cluster_size_ = 0;
-        current_data_size_ = 0;
-    } else if (header_.cluster_ops) {
-        current_cluster_size_ += sizeof(op);
-        current_data_size_ += op.data_length;
-    }
-
-    next_data_pos_ += op.data_length + GetNextDataOffset(op, header_.cluster_ops);
-    next_op_pos_ += sizeof(CowOperation) + GetNextOpOffset(op, header_.cluster_ops);
-    ops_.insert(ops_.size(), reinterpret_cast<const uint8_t*>(&op), sizeof(op));
-}
-
-bool CowWriter::WriteRawData(const void* data, size_t size) {
-    if (lseek(fd_.get(), next_data_pos_, SEEK_SET) < 0) {
-        PLOG(ERROR) << "lseek failed for writing data.";
-        return false;
-    }
-
-    if (!android::base::WriteFully(fd_, data, size)) {
-        return false;
-    }
-    return true;
-}
-
-bool CowWriter::Sync() {
-    if (is_dev_null_) {
-        return true;
-    }
-    if (fsync(fd_.get()) < 0) {
-        PLOG(ERROR) << "fsync failed";
-        return false;
-    }
-    return true;
-}
-
-bool CowWriter::Truncate(off_t length) {
-    if (is_dev_null_ || is_block_device_) {
-        return true;
-    }
-    if (ftruncate(fd_.get(), length) < 0) {
-        PLOG(ERROR) << "Failed to truncate.";
-        return false;
-    }
-    return true;
-}
-
-}  // namespace snapshot
-}  // namespace android
diff --git a/fs_mgr/libsnapshot/include/libsnapshot/cow_writer.h b/fs_mgr/libsnapshot/include/libsnapshot/cow_writer.h
index e7a2f02..798bc73 100644
--- a/fs_mgr/libsnapshot/include/libsnapshot/cow_writer.h
+++ b/fs_mgr/libsnapshot/include/libsnapshot/cow_writer.h
@@ -16,9 +16,17 @@
 
 #include <stdint.h>
 
+#include <condition_variable>
+#include <cstdint>
+#include <future>
 #include <memory>
+#include <mutex>
 #include <optional>
+#include <queue>
 #include <string>
+#include <thread>
+#include <utility>
+#include <vector>
 
 #include <android-base/unique_fd.h>
 #include <libsnapshot/cow_format.h>
@@ -41,6 +49,12 @@
 
     // Preset the number of merged ops. Only useful for testing.
     uint64_t num_merge_ops = 0;
+
+    // Number of threads for compression
+    int num_compress_threads = 0;
+
+    // Batch write cluster ops
+    bool batch_write = false;
 };
 
 // Interface for writing to a snapuserd COW. All operations are ordered; merges
@@ -52,8 +66,9 @@
     virtual ~ICowWriter() {}
 
     // Encode an operation that copies the contents of |old_block| to the
-    // location of |new_block|.
-    bool AddCopy(uint64_t new_block, uint64_t old_block);
+    // location of |new_block|. 'num_blocks' is the number of contiguous
+    // COPY operations from |old_block| to |new_block|.
+    bool AddCopy(uint64_t new_block, uint64_t old_block, uint64_t num_blocks = 1);
 
     // Encode a sequence of raw blocks. |size| must be a multiple of the block size.
     bool AddRawBlocks(uint64_t new_block_start, const void* data, size_t size);
@@ -84,7 +99,7 @@
     const CowOptions& options() { return options_; }
 
   protected:
-    virtual bool EmitCopy(uint64_t new_block, uint64_t old_block) = 0;
+    virtual bool EmitCopy(uint64_t new_block, uint64_t old_block, uint64_t num_blocks = 1) = 0;
     virtual bool EmitRawBlocks(uint64_t new_block_start, const void* data, size_t size) = 0;
     virtual bool EmitXorBlocks(uint32_t new_block_start, const void* data, size_t size,
                                uint32_t old_block, uint16_t offset) = 0;
@@ -98,9 +113,40 @@
     CowOptions options_;
 };
 
+class CompressWorker {
+  public:
+    CompressWorker(CowCompressionAlgorithm compression, uint32_t block_size);
+    bool RunThread();
+    void EnqueueCompressBlocks(const void* buffer, size_t num_blocks);
+    bool GetCompressedBuffers(std::vector<std::basic_string<uint8_t>>* compressed_buf);
+    void Finalize();
+
+  private:
+    struct CompressWork {
+        const void* buffer;
+        size_t num_blocks;
+        bool compression_status = false;
+        std::vector<std::basic_string<uint8_t>> compressed_data;
+    };
+
+    CowCompressionAlgorithm compression_;
+    uint32_t block_size_;
+
+    std::queue<CompressWork> work_queue_;
+    std::queue<CompressWork> compressed_queue_;
+    std::mutex lock_;
+    std::condition_variable cv_;
+    bool stopped_ = false;
+
+    std::basic_string<uint8_t> Compress(const void* data, size_t length);
+    bool CompressBlocks(const void* buffer, size_t num_blocks,
+                        std::vector<std::basic_string<uint8_t>>* compressed_data);
+};
+
 class CowWriter : public ICowWriter {
   public:
     explicit CowWriter(const CowOptions& options);
+    ~CowWriter();
 
     // Set up the writer.
     // The file starts from the beginning.
@@ -122,7 +168,7 @@
     uint32_t GetCowVersion() { return header_.major_version; }
 
   protected:
-    virtual bool EmitCopy(uint64_t new_block, uint64_t old_block) override;
+    virtual bool EmitCopy(uint64_t new_block, uint64_t old_block, uint64_t num_blocks = 1) override;
     virtual bool EmitRawBlocks(uint64_t new_block_start, const void* data, size_t size) override;
     virtual bool EmitXorBlocks(uint32_t new_block_start, const void* data, size_t size,
                                uint32_t old_block, uint16_t offset) override;
@@ -136,6 +182,7 @@
     bool EmitBlocks(uint64_t new_block_start, const void* data, size_t size, uint64_t old_block,
                     uint16_t offset, uint8_t type);
     void SetupHeaders();
+    void SetupWriteOptions();
     bool ParseOptions();
     bool OpenForWrite();
     bool OpenForAppend(uint64_t label);
@@ -143,12 +190,16 @@
     bool WriteRawData(const void* data, size_t size);
     bool WriteOperation(const CowOperation& op, const void* data = nullptr, size_t size = 0);
     void AddOperation(const CowOperation& op);
-    std::basic_string<uint8_t> Compress(const void* data, size_t length);
     void InitPos();
+    void InitBatchWrites();
+    void InitWorkers();
+    bool FlushCluster();
 
+    bool CompressBlocks(size_t num_blocks, const void* data);
     bool SetFd(android::base::borrowed_fd fd);
     bool Sync();
     bool Truncate(off_t length);
+    bool EnsureSpaceAvailable(const uint64_t bytes_needed) const;
 
   private:
     android::base::unique_fd owned_fd_;
@@ -156,18 +207,33 @@
     CowHeader header_{};
     CowFooter footer_{};
     CowCompressionAlgorithm compression_ = kCowCompressNone;
+    uint64_t current_op_pos_ = 0;
     uint64_t next_op_pos_ = 0;
     uint64_t next_data_pos_ = 0;
+    uint64_t current_data_pos_ = 0;
+    ssize_t total_data_written_ = 0;
     uint32_t cluster_size_ = 0;
     uint32_t current_cluster_size_ = 0;
     uint64_t current_data_size_ = 0;
     bool is_dev_null_ = false;
     bool merge_in_progress_ = false;
     bool is_block_device_ = false;
+    uint64_t cow_image_size_ = INT64_MAX;
 
-    // :TODO: this is not efficient, but stringstream ubsan aborts because some
-    // bytes overflow a signed char.
-    std::basic_string<uint8_t> ops_;
+    int num_compress_threads_ = 1;
+    std::vector<std::unique_ptr<CompressWorker>> compress_threads_;
+    std::vector<std::future<bool>> threads_;
+    std::vector<std::basic_string<uint8_t>> compressed_buf_;
+    std::vector<std::basic_string<uint8_t>>::iterator buf_iter_;
+
+    std::vector<std::unique_ptr<CowOperation>> opbuffer_vec_;
+    std::vector<std::unique_ptr<uint8_t[]>> databuffer_vec_;
+    std::unique_ptr<struct iovec[]> cowop_vec_;
+    int op_vec_index_ = 0;
+
+    std::unique_ptr<struct iovec[]> data_vec_;
+    int data_vec_index_ = 0;
+    bool batch_write_ = false;
 };
 
 }  // namespace snapshot
diff --git a/fs_mgr/libsnapshot/include/libsnapshot/mock_snapshot_writer.h b/fs_mgr/libsnapshot/include/libsnapshot/mock_snapshot_writer.h
index b0be5a5..29828bc 100644
--- a/fs_mgr/libsnapshot/include/libsnapshot/mock_snapshot_writer.h
+++ b/fs_mgr/libsnapshot/include/libsnapshot/mock_snapshot_writer.h
@@ -34,7 +34,7 @@
     // Returns true if AddCopy() operations are supported.
     MOCK_METHOD(bool, SupportsCopyOperation, (), (const override));
 
-    MOCK_METHOD(bool, EmitCopy, (uint64_t, uint64_t), (override));
+    MOCK_METHOD(bool, EmitCopy, (uint64_t, uint64_t, uint64_t), (override));
     MOCK_METHOD(bool, EmitRawBlocks, (uint64_t, const void*, size_t), (override));
     MOCK_METHOD(bool, EmitXorBlocks, (uint32_t, const void*, size_t, uint32_t, uint16_t),
                 (override));
diff --git a/fs_mgr/libsnapshot/include/libsnapshot/snapshot_writer.h b/fs_mgr/libsnapshot/include/libsnapshot/snapshot_writer.h
index 545f117..0e3b1db 100644
--- a/fs_mgr/libsnapshot/include/libsnapshot/snapshot_writer.h
+++ b/fs_mgr/libsnapshot/include/libsnapshot/snapshot_writer.h
@@ -74,7 +74,7 @@
     bool VerifyMergeOps() const noexcept;
 
   protected:
-    bool EmitCopy(uint64_t new_block, uint64_t old_block) override;
+    bool EmitCopy(uint64_t new_block, uint64_t old_block, uint64_t num_blocks = 1) override;
     bool EmitRawBlocks(uint64_t new_block_start, const void* data, size_t size) override;
     bool EmitXorBlocks(uint32_t new_block_start, const void* data, size_t size, uint32_t old_block,
                        uint16_t offset) override;
@@ -113,7 +113,7 @@
     bool EmitZeroBlocks(uint64_t new_block_start, uint64_t num_blocks) override;
     bool EmitXorBlocks(uint32_t new_block_start, const void* data, size_t size, uint32_t old_block,
                        uint16_t offset) override;
-    bool EmitCopy(uint64_t new_block, uint64_t old_block) override;
+    bool EmitCopy(uint64_t new_block, uint64_t old_block, uint64_t num_blocks = 1) override;
     bool EmitLabel(uint64_t label) override;
     bool EmitSequenceData(size_t num_ops, const uint32_t* data) override;
 
diff --git a/fs_mgr/libsnapshot/include_test/libsnapshot/test_helpers.h b/fs_mgr/libsnapshot/include_test/libsnapshot/test_helpers.h
index f850b94..24c91a8 100644
--- a/fs_mgr/libsnapshot/include_test/libsnapshot/test_helpers.h
+++ b/fs_mgr/libsnapshot/include_test/libsnapshot/test_helpers.h
@@ -143,6 +143,9 @@
     virtual DmDeviceState GetState(const std::string& name) const override {
         return impl_.GetState(name);
     }
+    virtual bool LoadTable(const std::string& name, const DmTable& table) {
+        return impl_.LoadTable(name, table);
+    }
     virtual bool LoadTableAndActivate(const std::string& name, const DmTable& table) {
         return impl_.LoadTableAndActivate(name, table);
     }
diff --git a/fs_mgr/libsnapshot/cow_api_test.cpp b/fs_mgr/libsnapshot/libsnapshot_cow/cow_api_test.cpp
similarity index 86%
rename from fs_mgr/libsnapshot/cow_api_test.cpp
rename to fs_mgr/libsnapshot/libsnapshot_cow/cow_api_test.cpp
index ba4044f..862ce55 100644
--- a/fs_mgr/libsnapshot/cow_api_test.cpp
+++ b/fs_mgr/libsnapshot/libsnapshot_cow/cow_api_test.cpp
@@ -62,6 +62,48 @@
     std::string stream_;
 };
 
+TEST_F(CowTest, CopyContiguous) {
+    CowOptions options;
+    options.cluster_ops = 0;
+    CowWriter writer(options);
+
+    ASSERT_TRUE(writer.Initialize(cow_->fd));
+
+    ASSERT_TRUE(writer.AddCopy(10, 1000, 100));
+    ASSERT_TRUE(writer.Finalize());
+    ASSERT_EQ(lseek(cow_->fd, 0, SEEK_SET), 0);
+
+    CowReader reader;
+    CowHeader header;
+    CowFooter footer;
+    ASSERT_TRUE(reader.Parse(cow_->fd));
+    ASSERT_TRUE(reader.GetHeader(&header));
+    ASSERT_TRUE(reader.GetFooter(&footer));
+    ASSERT_EQ(header.magic, kCowMagicNumber);
+    ASSERT_EQ(header.major_version, kCowVersionMajor);
+    ASSERT_EQ(header.minor_version, kCowVersionMinor);
+    ASSERT_EQ(header.block_size, options.block_size);
+    ASSERT_EQ(footer.op.num_ops, 100);
+
+    auto iter = reader.GetOpIter();
+    ASSERT_NE(iter, nullptr);
+    ASSERT_FALSE(iter->Done());
+
+    size_t i = 0;
+    while (!iter->Done()) {
+        auto op = &iter->Get();
+        ASSERT_EQ(op->type, kCowCopyOp);
+        ASSERT_EQ(op->compression, kCowCompressNone);
+        ASSERT_EQ(op->data_length, 0);
+        ASSERT_EQ(op->new_block, 10 + i);
+        ASSERT_EQ(op->source, 1000 + i);
+        iter->Next();
+        i += 1;
+    }
+
+    ASSERT_EQ(i, 100);
+}
+
 TEST_F(CowTest, ReadWrite) {
     CowOptions options;
     options.cluster_ops = 0;
@@ -256,6 +298,150 @@
     ASSERT_TRUE(iter->Done());
 }
 
+class CompressionRWTest : public CowTest, public testing::WithParamInterface<const char*> {};
+
+TEST_P(CompressionRWTest, ThreadedBatchWrites) {
+    CowOptions options;
+    options.compression = GetParam();
+    options.num_compress_threads = 2;
+
+    CowWriter writer(options);
+
+    ASSERT_TRUE(writer.Initialize(cow_->fd));
+
+    std::string xor_data = "This is test data-1. Testing xor";
+    xor_data.resize(options.block_size, '\0');
+    ASSERT_TRUE(writer.AddXorBlocks(50, xor_data.data(), xor_data.size(), 24, 10));
+
+    std::string data = "This is test data-2. Testing replace ops";
+    data.resize(options.block_size * 2048, '\0');
+    ASSERT_TRUE(writer.AddRawBlocks(100, data.data(), data.size()));
+
+    std::string data2 = "This is test data-3. Testing replace ops";
+    data2.resize(options.block_size * 259, '\0');
+    ASSERT_TRUE(writer.AddRawBlocks(6000, data2.data(), data2.size()));
+
+    std::string data3 = "This is test data-4. Testing replace ops";
+    data3.resize(options.block_size, '\0');
+    ASSERT_TRUE(writer.AddRawBlocks(9000, data3.data(), data3.size()));
+
+    ASSERT_TRUE(writer.Finalize());
+
+    int expected_blocks = (1 + 2048 + 259 + 1);
+    ASSERT_EQ(lseek(cow_->fd, 0, SEEK_SET), 0);
+
+    CowReader reader;
+    ASSERT_TRUE(reader.Parse(cow_->fd));
+
+    auto iter = reader.GetOpIter();
+    ASSERT_NE(iter, nullptr);
+
+    int total_blocks = 0;
+    while (!iter->Done()) {
+        auto op = &iter->Get();
+
+        if (op->type == kCowXorOp) {
+            total_blocks += 1;
+            StringSink sink;
+            ASSERT_EQ(op->new_block, 50);
+            ASSERT_EQ(op->source, 98314);  // 4096 * 24 + 10
+            ASSERT_TRUE(reader.ReadData(*op, &sink));
+            ASSERT_EQ(sink.stream(), xor_data);
+        }
+
+        if (op->type == kCowReplaceOp) {
+            total_blocks += 1;
+            if (op->new_block == 100) {
+                StringSink sink;
+                ASSERT_TRUE(reader.ReadData(*op, &sink));
+                data.resize(options.block_size);
+                ASSERT_EQ(sink.stream(), data);
+            }
+            if (op->new_block == 6000) {
+                StringSink sink;
+                ASSERT_TRUE(reader.ReadData(*op, &sink));
+                data2.resize(options.block_size);
+                ASSERT_EQ(sink.stream(), data2);
+            }
+            if (op->new_block == 9000) {
+                StringSink sink;
+                ASSERT_TRUE(reader.ReadData(*op, &sink));
+                ASSERT_EQ(sink.stream(), data3);
+            }
+        }
+
+        iter->Next();
+    }
+
+    ASSERT_EQ(total_blocks, expected_blocks);
+}
+
+TEST_P(CompressionRWTest, NoBatchWrites) {
+    CowOptions options;
+    options.compression = GetParam();
+    options.num_compress_threads = 1;
+    options.cluster_ops = 0;
+
+    CowWriter writer(options);
+
+    ASSERT_TRUE(writer.Initialize(cow_->fd));
+
+    std::string data = "Testing replace ops without batch writes";
+    data.resize(options.block_size * 1024, '\0');
+    ASSERT_TRUE(writer.AddRawBlocks(50, data.data(), data.size()));
+
+    std::string data2 = "Testing odd blocks without batch writes";
+    data2.resize(options.block_size * 111, '\0');
+    ASSERT_TRUE(writer.AddRawBlocks(3000, data2.data(), data2.size()));
+
+    std::string data3 = "Testing single 4k block";
+    data3.resize(options.block_size, '\0');
+    ASSERT_TRUE(writer.AddRawBlocks(5000, data3.data(), data3.size()));
+
+    ASSERT_TRUE(writer.Finalize());
+
+    int expected_blocks = (1024 + 111 + 1);
+    ASSERT_EQ(lseek(cow_->fd, 0, SEEK_SET), 0);
+
+    CowReader reader;
+    ASSERT_TRUE(reader.Parse(cow_->fd));
+
+    auto iter = reader.GetOpIter();
+    ASSERT_NE(iter, nullptr);
+
+    int total_blocks = 0;
+    while (!iter->Done()) {
+        auto op = &iter->Get();
+
+        if (op->type == kCowReplaceOp) {
+            total_blocks += 1;
+            if (op->new_block == 50) {
+                StringSink sink;
+                ASSERT_TRUE(reader.ReadData(*op, &sink));
+                data.resize(options.block_size);
+                ASSERT_EQ(sink.stream(), data);
+            }
+            if (op->new_block == 3000) {
+                StringSink sink;
+                ASSERT_TRUE(reader.ReadData(*op, &sink));
+                data2.resize(options.block_size);
+                ASSERT_EQ(sink.stream(), data2);
+            }
+            if (op->new_block == 5000) {
+                StringSink sink;
+                ASSERT_TRUE(reader.ReadData(*op, &sink));
+                ASSERT_EQ(sink.stream(), data3);
+            }
+        }
+
+        iter->Next();
+    }
+
+    ASSERT_EQ(total_blocks, expected_blocks);
+}
+
+INSTANTIATE_TEST_SUITE_P(CowApi, CompressionRWTest, testing::Values("none", "gz", "brotli", "lz4"));
+
 TEST_F(CowTest, ClusterCompressGz) {
     CowOptions options;
     options.compression = "gz";
diff --git a/fs_mgr/libsnapshot/libsnapshot_cow/cow_compress.cpp b/fs_mgr/libsnapshot/libsnapshot_cow/cow_compress.cpp
new file mode 100644
index 0000000..4d9b748
--- /dev/null
+++ b/fs_mgr/libsnapshot/libsnapshot_cow/cow_compress.cpp
@@ -0,0 +1,218 @@
+//
+// Copyright (C) 2020 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+#include <sys/types.h>
+#include <unistd.h>
+
+#include <limits>
+#include <queue>
+
+#include <android-base/file.h>
+#include <android-base/logging.h>
+#include <android-base/unique_fd.h>
+#include <brotli/encode.h>
+#include <libsnapshot/cow_format.h>
+#include <libsnapshot/cow_reader.h>
+#include <libsnapshot/cow_writer.h>
+#include <lz4.h>
+#include <zlib.h>
+
+namespace android {
+namespace snapshot {
+
+std::basic_string<uint8_t> CompressWorker::Compress(const void* data, size_t length) {
+    switch (compression_) {
+        case kCowCompressGz: {
+            const auto bound = compressBound(length);
+            std::basic_string<uint8_t> buffer(bound, '\0');
+
+            uLongf dest_len = bound;
+            auto rv = compress2(buffer.data(), &dest_len, reinterpret_cast<const Bytef*>(data),
+                                length, Z_BEST_COMPRESSION);
+            if (rv != Z_OK) {
+                LOG(ERROR) << "compress2 returned: " << rv;
+                return {};
+            }
+            buffer.resize(dest_len);
+            return buffer;
+        }
+        case kCowCompressBrotli: {
+            const auto bound = BrotliEncoderMaxCompressedSize(length);
+            if (!bound) {
+                LOG(ERROR) << "BrotliEncoderMaxCompressedSize returned 0";
+                return {};
+            }
+            std::basic_string<uint8_t> buffer(bound, '\0');
+
+            size_t encoded_size = bound;
+            auto rv = BrotliEncoderCompress(
+                    BROTLI_DEFAULT_QUALITY, BROTLI_DEFAULT_WINDOW, BROTLI_DEFAULT_MODE, length,
+                    reinterpret_cast<const uint8_t*>(data), &encoded_size, buffer.data());
+            if (!rv) {
+                LOG(ERROR) << "BrotliEncoderCompress failed";
+                return {};
+            }
+            buffer.resize(encoded_size);
+            return buffer;
+        }
+        case kCowCompressLz4: {
+            const auto bound = LZ4_compressBound(length);
+            if (!bound) {
+                LOG(ERROR) << "LZ4_compressBound returned 0";
+                return {};
+            }
+            std::basic_string<uint8_t> buffer(bound, '\0');
+
+            const auto compressed_size = LZ4_compress_default(
+                    static_cast<const char*>(data), reinterpret_cast<char*>(buffer.data()), length,
+                    buffer.size());
+            if (compressed_size <= 0) {
+                LOG(ERROR) << "LZ4_compress_default failed, input size: " << length
+                           << ", compression bound: " << bound << ", ret: " << compressed_size;
+                return {};
+            }
+            // Don't run compression if the compressed output is larger
+            if (compressed_size >= length) {
+                buffer.resize(length);
+                memcpy(buffer.data(), data, length);
+            } else {
+                buffer.resize(compressed_size);
+            }
+            return buffer;
+        }
+        default:
+            LOG(ERROR) << "unhandled compression type: " << compression_;
+            break;
+    }
+    return {};
+}
+
+bool CompressWorker::CompressBlocks(const void* buffer, size_t num_blocks,
+                                    std::vector<std::basic_string<uint8_t>>* compressed_data) {
+    const uint8_t* iter = reinterpret_cast<const uint8_t*>(buffer);
+    while (num_blocks) {
+        auto data = Compress(iter, block_size_);
+        if (data.empty()) {
+            PLOG(ERROR) << "CompressBlocks: Compression failed";
+            return false;
+        }
+        if (data.size() > std::numeric_limits<uint16_t>::max()) {
+            LOG(ERROR) << "Compressed block is too large: " << data.size();
+            return false;
+        }
+
+        compressed_data->emplace_back(std::move(data));
+        num_blocks -= 1;
+        iter += block_size_;
+    }
+    return true;
+}
+
+bool CompressWorker::RunThread() {
+    while (true) {
+        // Wait for work
+        CompressWork blocks;
+        {
+            std::unique_lock<std::mutex> lock(lock_);
+            while (work_queue_.empty() && !stopped_) {
+                cv_.wait(lock);
+            }
+
+            if (stopped_) {
+                return true;
+            }
+
+            blocks = std::move(work_queue_.front());
+            work_queue_.pop();
+        }
+
+        // Compress blocks
+        bool ret = CompressBlocks(blocks.buffer, blocks.num_blocks, &blocks.compressed_data);
+        blocks.compression_status = ret;
+        {
+            std::lock_guard<std::mutex> lock(lock_);
+            compressed_queue_.push(std::move(blocks));
+        }
+
+        // Notify completion
+        cv_.notify_all();
+
+        if (!ret) {
+            LOG(ERROR) << "CompressBlocks failed";
+            return false;
+        }
+    }
+
+    return true;
+}
+
+void CompressWorker::EnqueueCompressBlocks(const void* buffer, size_t num_blocks) {
+    {
+        std::lock_guard<std::mutex> lock(lock_);
+
+        CompressWork blocks = {};
+        blocks.buffer = buffer;
+        blocks.num_blocks = num_blocks;
+        work_queue_.push(std::move(blocks));
+    }
+    cv_.notify_all();
+}
+
+bool CompressWorker::GetCompressedBuffers(std::vector<std::basic_string<uint8_t>>* compressed_buf) {
+    {
+        std::unique_lock<std::mutex> lock(lock_);
+        while (compressed_queue_.empty() && !stopped_) {
+            cv_.wait(lock);
+        }
+
+        if (stopped_) {
+            return true;
+        }
+    }
+
+    {
+        std::lock_guard<std::mutex> lock(lock_);
+        while (compressed_queue_.size() > 0) {
+            CompressWork blocks = std::move(compressed_queue_.front());
+            compressed_queue_.pop();
+
+            if (blocks.compression_status) {
+                compressed_buf->insert(compressed_buf->end(),
+                                       std::make_move_iterator(blocks.compressed_data.begin()),
+                                       std::make_move_iterator(blocks.compressed_data.end()));
+            } else {
+                LOG(ERROR) << "Block compression failed";
+                return false;
+            }
+        }
+    }
+
+    return true;
+}
+
+void CompressWorker::Finalize() {
+    {
+        std::unique_lock<std::mutex> lock(lock_);
+        stopped_ = true;
+    }
+    cv_.notify_all();
+}
+
+CompressWorker::CompressWorker(CowCompressionAlgorithm compression, uint32_t block_size)
+    : compression_(compression), block_size_(block_size) {}
+
+}  // namespace snapshot
+}  // namespace android
diff --git a/fs_mgr/libsnapshot/cow_decompress.cpp b/fs_mgr/libsnapshot/libsnapshot_cow/cow_decompress.cpp
similarity index 94%
rename from fs_mgr/libsnapshot/cow_decompress.cpp
rename to fs_mgr/libsnapshot/libsnapshot_cow/cow_decompress.cpp
index a4d2277..139a29f 100644
--- a/fs_mgr/libsnapshot/cow_decompress.cpp
+++ b/fs_mgr/libsnapshot/libsnapshot_cow/cow_decompress.cpp
@@ -273,6 +273,18 @@
                        << actual_buffer_size << " bytes";
             return false;
         }
+        // If input size is same as output size, then input is uncompressed.
+        if (stream_->Size() == output_size) {
+            size_t bytes_read = 0;
+            stream_->Read(output_buffer, output_size, &bytes_read);
+            if (bytes_read != output_size) {
+                LOG(ERROR) << "Failed to read all input at once. Expected: " << output_size
+                           << " actual: " << bytes_read;
+                return false;
+            }
+            sink_->ReturnData(output_buffer, output_size);
+            return true;
+        }
         std::string input_buffer;
         input_buffer.resize(stream_->Size());
         size_t bytes_read = 0;
diff --git a/fs_mgr/libsnapshot/cow_decompress.h b/fs_mgr/libsnapshot/libsnapshot_cow/cow_decompress.h
similarity index 100%
rename from fs_mgr/libsnapshot/cow_decompress.h
rename to fs_mgr/libsnapshot/libsnapshot_cow/cow_decompress.h
diff --git a/fs_mgr/libsnapshot/cow_format.cpp b/fs_mgr/libsnapshot/libsnapshot_cow/cow_format.cpp
similarity index 100%
rename from fs_mgr/libsnapshot/cow_format.cpp
rename to fs_mgr/libsnapshot/libsnapshot_cow/cow_format.cpp
diff --git a/fs_mgr/libsnapshot/cow_reader.cpp b/fs_mgr/libsnapshot/libsnapshot_cow/cow_reader.cpp
similarity index 100%
rename from fs_mgr/libsnapshot/cow_reader.cpp
rename to fs_mgr/libsnapshot/libsnapshot_cow/cow_reader.cpp
diff --git a/fs_mgr/libsnapshot/libsnapshot_cow/cow_writer.cpp b/fs_mgr/libsnapshot/libsnapshot_cow/cow_writer.cpp
new file mode 100644
index 0000000..2d5e4bc
--- /dev/null
+++ b/fs_mgr/libsnapshot/libsnapshot_cow/cow_writer.cpp
@@ -0,0 +1,835 @@
+//
+// Copyright (C) 2020 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+#include <sys/types.h>
+#include <sys/uio.h>
+#include <unistd.h>
+
+#include <limits>
+#include <queue>
+
+#include <android-base/file.h>
+#include <android-base/logging.h>
+#include <android-base/properties.h>
+#include <android-base/unique_fd.h>
+#include <brotli/encode.h>
+#include <libsnapshot/cow_format.h>
+#include <libsnapshot/cow_reader.h>
+#include <libsnapshot/cow_writer.h>
+#include <lz4.h>
+#include <zlib.h>
+
+#include <fcntl.h>
+#include <linux/fs.h>
+#include <sys/ioctl.h>
+#include <unistd.h>
+
+namespace android {
+namespace snapshot {
+
+namespace {
+std::string GetFdPath(int fd) {
+    const auto fd_path = "/proc/self/fd/" + std::to_string(fd);
+    std::string file_path(512, '\0');
+    const auto err = readlink(fd_path.c_str(), file_path.data(), file_path.size());
+    if (err <= 0) {
+        PLOG(ERROR) << "Failed to determine path for fd " << fd;
+        file_path.clear();
+    } else {
+        file_path.resize(err);
+    }
+    return file_path;
+}
+}  // namespace
+
+static_assert(sizeof(off_t) == sizeof(uint64_t));
+
+using android::base::borrowed_fd;
+using android::base::unique_fd;
+
+bool ICowWriter::AddCopy(uint64_t new_block, uint64_t old_block, uint64_t num_blocks) {
+    CHECK(num_blocks != 0);
+
+    for (size_t i = 0; i < num_blocks; i++) {
+        if (!ValidateNewBlock(new_block + i)) {
+            return false;
+        }
+    }
+
+    return EmitCopy(new_block, old_block, num_blocks);
+}
+
+bool ICowWriter::AddRawBlocks(uint64_t new_block_start, const void* data, size_t size) {
+    if (size % options_.block_size != 0) {
+        LOG(ERROR) << "AddRawBlocks: size " << size << " is not a multiple of "
+                   << options_.block_size;
+        return false;
+    }
+
+    uint64_t num_blocks = size / options_.block_size;
+    uint64_t last_block = new_block_start + num_blocks - 1;
+    if (!ValidateNewBlock(last_block)) {
+        return false;
+    }
+    return EmitRawBlocks(new_block_start, data, size);
+}
+
+bool ICowWriter::AddXorBlocks(uint32_t new_block_start, const void* data, size_t size,
+                              uint32_t old_block, uint16_t offset) {
+    if (size % options_.block_size != 0) {
+        LOG(ERROR) << "AddRawBlocks: size " << size << " is not a multiple of "
+                   << options_.block_size;
+        return false;
+    }
+
+    uint64_t num_blocks = size / options_.block_size;
+    uint64_t last_block = new_block_start + num_blocks - 1;
+    if (!ValidateNewBlock(last_block)) {
+        return false;
+    }
+    if (offset >= options_.block_size) {
+        LOG(ERROR) << "AddXorBlocks: offset " << offset << " is not less than "
+                   << options_.block_size;
+    }
+    return EmitXorBlocks(new_block_start, data, size, old_block, offset);
+}
+
+bool ICowWriter::AddZeroBlocks(uint64_t new_block_start, uint64_t num_blocks) {
+    uint64_t last_block = new_block_start + num_blocks - 1;
+    if (!ValidateNewBlock(last_block)) {
+        return false;
+    }
+    return EmitZeroBlocks(new_block_start, num_blocks);
+}
+
+bool ICowWriter::AddLabel(uint64_t label) {
+    return EmitLabel(label);
+}
+
+bool ICowWriter::AddSequenceData(size_t num_ops, const uint32_t* data) {
+    return EmitSequenceData(num_ops, data);
+}
+
+bool ICowWriter::ValidateNewBlock(uint64_t new_block) {
+    if (options_.max_blocks && new_block >= options_.max_blocks.value()) {
+        LOG(ERROR) << "New block " << new_block << " exceeds maximum block count "
+                   << options_.max_blocks.value();
+        return false;
+    }
+    return true;
+}
+
+CowWriter::CowWriter(const CowOptions& options) : ICowWriter(options), fd_(-1) {
+    SetupHeaders();
+    SetupWriteOptions();
+}
+
+CowWriter::~CowWriter() {
+    for (size_t i = 0; i < compress_threads_.size(); i++) {
+        CompressWorker* worker = compress_threads_[i].get();
+        if (worker) {
+            worker->Finalize();
+        }
+    }
+
+    bool ret = true;
+    for (auto& t : threads_) {
+        ret = t.get() && ret;
+    }
+
+    if (!ret) {
+        LOG(ERROR) << "Compression failed";
+    }
+    compress_threads_.clear();
+}
+
+void CowWriter::SetupWriteOptions() {
+    num_compress_threads_ = options_.num_compress_threads;
+
+    if (!num_compress_threads_) {
+        num_compress_threads_ = 1;
+        // We prefer not to have more than two threads as the overhead of additional
+        // threads is far greater than cutting down compression time.
+        if (header_.cluster_ops &&
+            android::base::GetBoolProperty("ro.virtual_ab.compression.threads", false)) {
+            num_compress_threads_ = 2;
+        }
+    }
+
+    if (header_.cluster_ops &&
+        (android::base::GetBoolProperty("ro.virtual_ab.batch_writes", false) ||
+         options_.batch_write)) {
+        batch_write_ = true;
+    }
+}
+
+void CowWriter::SetupHeaders() {
+    header_ = {};
+    header_.magic = kCowMagicNumber;
+    header_.major_version = kCowVersionMajor;
+    header_.minor_version = kCowVersionMinor;
+    header_.header_size = sizeof(CowHeader);
+    header_.footer_size = sizeof(CowFooter);
+    header_.op_size = sizeof(CowOperation);
+    header_.block_size = options_.block_size;
+    header_.num_merge_ops = options_.num_merge_ops;
+    header_.cluster_ops = options_.cluster_ops;
+    header_.buffer_size = 0;
+    footer_ = {};
+    footer_.op.data_length = 64;
+    footer_.op.type = kCowFooterOp;
+}
+
+bool CowWriter::ParseOptions() {
+    if (options_.compression == "gz") {
+        compression_ = kCowCompressGz;
+    } else if (options_.compression == "brotli") {
+        compression_ = kCowCompressBrotli;
+    } else if (options_.compression == "lz4") {
+        compression_ = kCowCompressLz4;
+    } else if (options_.compression == "none") {
+        compression_ = kCowCompressNone;
+    } else if (!options_.compression.empty()) {
+        LOG(ERROR) << "unrecognized compression: " << options_.compression;
+        return false;
+    }
+    if (options_.cluster_ops == 1) {
+        LOG(ERROR) << "Clusters must contain at least two operations to function.";
+        return false;
+    }
+    return true;
+}
+
+bool CowWriter::SetFd(android::base::borrowed_fd fd) {
+    if (fd.get() < 0) {
+        owned_fd_.reset(open("/dev/null", O_RDWR | O_CLOEXEC));
+        if (owned_fd_ < 0) {
+            PLOG(ERROR) << "open /dev/null failed";
+            return false;
+        }
+        fd_ = owned_fd_;
+        is_dev_null_ = true;
+    } else {
+        fd_ = fd;
+
+        struct stat stat {};
+        if (fstat(fd.get(), &stat) < 0) {
+            PLOG(ERROR) << "fstat failed";
+            return false;
+        }
+        const auto file_path = GetFdPath(fd.get());
+        is_block_device_ = S_ISBLK(stat.st_mode);
+        if (is_block_device_) {
+            uint64_t size_in_bytes = 0;
+            if (ioctl(fd.get(), BLKGETSIZE64, &size_in_bytes)) {
+                PLOG(ERROR) << "Failed to get total size for: " << fd.get();
+                return false;
+            }
+            cow_image_size_ = size_in_bytes;
+            LOG(INFO) << "COW image " << file_path << " has size " << size_in_bytes;
+        } else {
+            LOG(INFO) << "COW image " << file_path
+                      << " is not a block device, assuming unlimited space.";
+        }
+    }
+    return true;
+}
+
+void CowWriter::InitBatchWrites() {
+    if (batch_write_) {
+        cowop_vec_ = std::make_unique<struct iovec[]>(header_.cluster_ops);
+        data_vec_ = std::make_unique<struct iovec[]>(header_.cluster_ops);
+        struct iovec* cowop_ptr = cowop_vec_.get();
+        struct iovec* data_ptr = data_vec_.get();
+        for (size_t i = 0; i < header_.cluster_ops; i++) {
+            std::unique_ptr<CowOperation> op = std::make_unique<CowOperation>();
+            cowop_ptr[i].iov_base = op.get();
+            cowop_ptr[i].iov_len = sizeof(CowOperation);
+            opbuffer_vec_.push_back(std::move(op));
+
+            std::unique_ptr<uint8_t[]> buffer = std::make_unique<uint8_t[]>(header_.block_size * 2);
+            data_ptr[i].iov_base = buffer.get();
+            data_ptr[i].iov_len = header_.block_size * 2;
+            databuffer_vec_.push_back(std::move(buffer));
+        }
+
+        current_op_pos_ = next_op_pos_;
+        current_data_pos_ = next_data_pos_;
+    }
+
+    std::string batch_write = batch_write_ ? "enabled" : "disabled";
+    LOG(INFO) << "Batch writes: " << batch_write;
+}
+
+void CowWriter::InitWorkers() {
+    for (int i = 0; i < num_compress_threads_; i++) {
+        auto wt = std::make_unique<CompressWorker>(compression_, header_.block_size);
+        threads_.emplace_back(std::async(std::launch::async, &CompressWorker::RunThread, wt.get()));
+        compress_threads_.push_back(std::move(wt));
+    }
+
+    LOG(INFO) << num_compress_threads_ << " thread used for compression";
+}
+
+bool CowWriter::Initialize(unique_fd&& fd) {
+    owned_fd_ = std::move(fd);
+    return Initialize(borrowed_fd{owned_fd_});
+}
+
+bool CowWriter::Initialize(borrowed_fd fd) {
+    if (!SetFd(fd) || !ParseOptions()) {
+        return false;
+    }
+
+    bool ret = OpenForWrite();
+
+    if (ret) {
+        InitWorkers();
+    }
+
+    return ret;
+}
+
+bool CowWriter::InitializeAppend(android::base::unique_fd&& fd, uint64_t label) {
+    owned_fd_ = std::move(fd);
+    return InitializeAppend(android::base::borrowed_fd{owned_fd_}, label);
+}
+
+bool CowWriter::InitializeAppend(android::base::borrowed_fd fd, uint64_t label) {
+    if (!SetFd(fd) || !ParseOptions()) {
+        return false;
+    }
+
+    bool ret = OpenForAppend(label);
+
+    if (ret && !compress_threads_.size()) {
+        InitWorkers();
+    }
+
+    return ret;
+}
+
+void CowWriter::InitPos() {
+    next_op_pos_ = sizeof(header_) + header_.buffer_size;
+    cluster_size_ = header_.cluster_ops * sizeof(CowOperation);
+    if (header_.cluster_ops) {
+        next_data_pos_ = next_op_pos_ + cluster_size_;
+    } else {
+        next_data_pos_ = next_op_pos_ + sizeof(CowOperation);
+    }
+    current_cluster_size_ = 0;
+    current_data_size_ = 0;
+}
+
+bool CowWriter::OpenForWrite() {
+    // This limitation is tied to the data field size in CowOperation.
+    if (header_.block_size > std::numeric_limits<uint16_t>::max()) {
+        LOG(ERROR) << "Block size is too large";
+        return false;
+    }
+
+    if (lseek(fd_.get(), 0, SEEK_SET) < 0) {
+        PLOG(ERROR) << "lseek failed";
+        return false;
+    }
+
+    if (options_.scratch_space) {
+        header_.buffer_size = BUFFER_REGION_DEFAULT_SIZE;
+    }
+
+    // Headers are not complete, but this ensures the file is at the right
+    // position.
+    if (!android::base::WriteFully(fd_, &header_, sizeof(header_))) {
+        PLOG(ERROR) << "write failed";
+        return false;
+    }
+
+    if (options_.scratch_space) {
+        // Initialize the scratch space
+        std::string data(header_.buffer_size, 0);
+        if (!android::base::WriteFully(fd_, data.data(), header_.buffer_size)) {
+            PLOG(ERROR) << "writing scratch space failed";
+            return false;
+        }
+    }
+
+    if (!Sync()) {
+        LOG(ERROR) << "Header sync failed";
+        return false;
+    }
+
+    if (lseek(fd_.get(), sizeof(header_) + header_.buffer_size, SEEK_SET) < 0) {
+        PLOG(ERROR) << "lseek failed";
+        return false;
+    }
+
+    InitPos();
+    InitBatchWrites();
+
+    return true;
+}
+
+bool CowWriter::OpenForAppend(uint64_t label) {
+    auto reader = std::make_unique<CowReader>();
+    std::queue<CowOperation> toAdd;
+
+    if (!reader->Parse(fd_, {label}) || !reader->GetHeader(&header_)) {
+        return false;
+    }
+
+    options_.block_size = header_.block_size;
+    options_.cluster_ops = header_.cluster_ops;
+
+    // Reset this, since we're going to reimport all operations.
+    footer_.op.num_ops = 0;
+    InitPos();
+
+    auto iter = reader->GetOpIter();
+
+    while (!iter->Done()) {
+        AddOperation(iter->Get());
+        iter->Next();
+    }
+
+    // Free reader so we own the descriptor position again.
+    reader = nullptr;
+
+    if (lseek(fd_.get(), next_op_pos_, SEEK_SET) < 0) {
+        PLOG(ERROR) << "lseek failed";
+        return false;
+    }
+
+    InitBatchWrites();
+
+    return EmitClusterIfNeeded();
+}
+
+bool CowWriter::EmitCopy(uint64_t new_block, uint64_t old_block, uint64_t num_blocks) {
+    CHECK(!merge_in_progress_);
+
+    for (size_t i = 0; i < num_blocks; i++) {
+        CowOperation op = {};
+        op.type = kCowCopyOp;
+        op.new_block = new_block + i;
+        op.source = old_block + i;
+        if (!WriteOperation(op)) {
+            return false;
+        }
+    }
+
+    return true;
+}
+
+bool CowWriter::EmitRawBlocks(uint64_t new_block_start, const void* data, size_t size) {
+    return EmitBlocks(new_block_start, data, size, 0, 0, kCowReplaceOp);
+}
+
+bool CowWriter::EmitXorBlocks(uint32_t new_block_start, const void* data, size_t size,
+                              uint32_t old_block, uint16_t offset) {
+    return EmitBlocks(new_block_start, data, size, old_block, offset, kCowXorOp);
+}
+
+bool CowWriter::CompressBlocks(size_t num_blocks, const void* data) {
+    size_t num_threads = (num_blocks == 1) ? 1 : num_compress_threads_;
+    size_t num_blocks_per_thread = num_blocks / num_threads;
+    const uint8_t* iter = reinterpret_cast<const uint8_t*>(data);
+    compressed_buf_.clear();
+
+    // Submit the blocks per thread. The retrieval of
+    // compressed buffers has to be done in the same order.
+    // We should not poll for completed buffers in a different order as the
+    // buffers are tightly coupled with block ordering.
+    for (size_t i = 0; i < num_threads; i++) {
+        CompressWorker* worker = compress_threads_[i].get();
+        if (i == num_threads - 1) {
+            num_blocks_per_thread = num_blocks;
+        }
+        worker->EnqueueCompressBlocks(iter, num_blocks_per_thread);
+        iter += (num_blocks_per_thread * header_.block_size);
+        num_blocks -= num_blocks_per_thread;
+    }
+
+    for (size_t i = 0; i < num_threads; i++) {
+        CompressWorker* worker = compress_threads_[i].get();
+        if (!worker->GetCompressedBuffers(&compressed_buf_)) {
+            return false;
+        }
+    }
+
+    return true;
+}
+
+bool CowWriter::EmitBlocks(uint64_t new_block_start, const void* data, size_t size,
+                           uint64_t old_block, uint16_t offset, uint8_t type) {
+    CHECK(!merge_in_progress_);
+    const uint8_t* iter = reinterpret_cast<const uint8_t*>(data);
+
+    // Update engine can potentially send 100MB of blocks at a time. We
+    // don't want to process all those blocks in one shot as it can
+    // stress the memory. Hence, process the blocks in chunks.
+    //
+    // 1024 blocks is reasonable given we will end up using max
+    // memory of ~4MB.
+    const size_t kProcessingBlocks = 1024;
+    size_t num_blocks = (size / header_.block_size);
+    size_t i = 0;
+
+    while (num_blocks) {
+        size_t pending_blocks = (std::min(kProcessingBlocks, num_blocks));
+
+        if (compression_) {
+            if (!CompressBlocks(pending_blocks, iter)) {
+                return false;
+            }
+            buf_iter_ = compressed_buf_.begin();
+            CHECK(pending_blocks == compressed_buf_.size());
+            iter += (pending_blocks * header_.block_size);
+        }
+
+        num_blocks -= pending_blocks;
+
+        while (i < size / header_.block_size && pending_blocks) {
+            CowOperation op = {};
+            op.new_block = new_block_start + i;
+            op.type = type;
+            if (type == kCowXorOp) {
+                op.source = (old_block + i) * header_.block_size + offset;
+            } else {
+                op.source = next_data_pos_;
+            }
+
+            if (compression_) {
+                auto data = std::move(*buf_iter_);
+                op.compression = compression_;
+                op.data_length = static_cast<uint16_t>(data.size());
+
+                if (!WriteOperation(op, data.data(), data.size())) {
+                    PLOG(ERROR) << "AddRawBlocks: write failed";
+                    return false;
+                }
+                buf_iter_++;
+            } else {
+                op.data_length = static_cast<uint16_t>(header_.block_size);
+                if (!WriteOperation(op, iter, header_.block_size)) {
+                    PLOG(ERROR) << "AddRawBlocks: write failed";
+                    return false;
+                }
+                iter += header_.block_size;
+            }
+
+            i += 1;
+            pending_blocks -= 1;
+        }
+
+        CHECK(pending_blocks == 0);
+    }
+    return true;
+}
+
+bool CowWriter::EmitZeroBlocks(uint64_t new_block_start, uint64_t num_blocks) {
+    CHECK(!merge_in_progress_);
+    for (uint64_t i = 0; i < num_blocks; i++) {
+        CowOperation op = {};
+        op.type = kCowZeroOp;
+        op.new_block = new_block_start + i;
+        op.source = 0;
+        WriteOperation(op);
+    }
+    return true;
+}
+
+bool CowWriter::EmitLabel(uint64_t label) {
+    CHECK(!merge_in_progress_);
+    CowOperation op = {};
+    op.type = kCowLabelOp;
+    op.source = label;
+    return WriteOperation(op) && Sync();
+}
+
+bool CowWriter::EmitSequenceData(size_t num_ops, const uint32_t* data) {
+    CHECK(!merge_in_progress_);
+    size_t to_add = 0;
+    size_t max_ops = (header_.block_size * 2) / sizeof(uint32_t);
+    while (num_ops > 0) {
+        CowOperation op = {};
+        op.type = kCowSequenceOp;
+        op.source = next_data_pos_;
+        to_add = std::min(num_ops, max_ops);
+        op.data_length = static_cast<uint16_t>(to_add * sizeof(uint32_t));
+        if (!WriteOperation(op, data, op.data_length)) {
+            PLOG(ERROR) << "AddSequenceData: write failed";
+            return false;
+        }
+        num_ops -= to_add;
+        data += to_add;
+    }
+    return true;
+}
+
+bool CowWriter::EmitCluster() {
+    CowOperation op = {};
+    op.type = kCowClusterOp;
+    // Next cluster starts after remainder of current cluster and the next data block.
+    op.source = current_data_size_ + cluster_size_ - current_cluster_size_ - sizeof(CowOperation);
+    return WriteOperation(op);
+}
+
+bool CowWriter::EmitClusterIfNeeded() {
+    // If there isn't room for another op and the cluster end op, end the current cluster
+    if (cluster_size_ && cluster_size_ < current_cluster_size_ + 2 * sizeof(CowOperation)) {
+        if (!EmitCluster()) return false;
+    }
+    return true;
+}
+
+// TODO: Fix compilation issues when linking libcrypto library
+// when snapuserd is compiled as part of ramdisk.
+static void SHA256(const void*, size_t, uint8_t[]) {
+#if 0
+    SHA256_CTX c;
+    SHA256_Init(&c);
+    SHA256_Update(&c, data, length);
+    SHA256_Final(out, &c);
+#endif
+}
+
+bool CowWriter::Finalize() {
+    if (!FlushCluster()) {
+        LOG(ERROR) << "Finalize: FlushCluster() failed";
+        return false;
+    }
+
+    auto continue_cluster_size = current_cluster_size_;
+    auto continue_data_size = current_data_size_;
+    auto continue_data_pos = next_data_pos_;
+    auto continue_op_pos = next_op_pos_;
+    auto continue_num_ops = footer_.op.num_ops;
+    bool extra_cluster = false;
+
+    // Blank out extra ops, in case we're in append mode and dropped ops.
+    if (cluster_size_) {
+        auto unused_cluster_space = cluster_size_ - current_cluster_size_;
+        std::string clr;
+        clr.resize(unused_cluster_space, '\0');
+        if (lseek(fd_.get(), next_op_pos_, SEEK_SET) < 0) {
+            PLOG(ERROR) << "Failed to seek to footer position.";
+            return false;
+        }
+        if (!android::base::WriteFully(fd_, clr.data(), clr.size())) {
+            PLOG(ERROR) << "clearing unused cluster area failed";
+            return false;
+        }
+    }
+
+    // Footer should be at the end of a file, so if there is data after the current block, end it
+    // and start a new cluster.
+    if (cluster_size_ && current_data_size_ > 0) {
+        EmitCluster();
+        extra_cluster = true;
+    }
+
+    footer_.op.ops_size = footer_.op.num_ops * sizeof(CowOperation);
+    if (lseek(fd_.get(), next_op_pos_, SEEK_SET) < 0) {
+        PLOG(ERROR) << "Failed to seek to footer position.";
+        return false;
+    }
+    memset(&footer_.data.ops_checksum, 0, sizeof(uint8_t) * 32);
+    memset(&footer_.data.footer_checksum, 0, sizeof(uint8_t) * 32);
+
+    SHA256(&footer_.op, sizeof(footer_.op), footer_.data.footer_checksum);
+    // Write out footer at end of file
+    if (!android::base::WriteFully(fd_, reinterpret_cast<const uint8_t*>(&footer_),
+                                   sizeof(footer_))) {
+        PLOG(ERROR) << "write footer failed";
+        return false;
+    }
+
+    // Remove excess data, if we're in append mode and threw away more data
+    // than we wrote before.
+    off_t offs = lseek(fd_.get(), 0, SEEK_CUR);
+    if (offs < 0) {
+        PLOG(ERROR) << "Failed to lseek to find current position";
+        return false;
+    }
+    if (!Truncate(offs)) {
+        return false;
+    }
+
+    // Reposition for additional Writing
+    if (extra_cluster) {
+        current_cluster_size_ = continue_cluster_size;
+        current_data_size_ = continue_data_size;
+        next_data_pos_ = continue_data_pos;
+        next_op_pos_ = continue_op_pos;
+        footer_.op.num_ops = continue_num_ops;
+    }
+
+    FlushCluster();
+
+    return Sync();
+}
+
+uint64_t CowWriter::GetCowSize() {
+    if (current_data_size_ > 0) {
+        return next_data_pos_ + sizeof(footer_);
+    } else {
+        return next_op_pos_ + sizeof(footer_);
+    }
+}
+
+bool CowWriter::GetDataPos(uint64_t* pos) {
+    off_t offs = lseek(fd_.get(), 0, SEEK_CUR);
+    if (offs < 0) {
+        PLOG(ERROR) << "lseek failed";
+        return false;
+    }
+    *pos = offs;
+    return true;
+}
+
+bool CowWriter::EnsureSpaceAvailable(const uint64_t bytes_needed) const {
+    if (bytes_needed > cow_image_size_) {
+        LOG(ERROR) << "No space left on COW device. Required: " << bytes_needed
+                   << ", available: " << cow_image_size_;
+        errno = ENOSPC;
+        return false;
+    }
+    return true;
+}
+
+bool CowWriter::FlushCluster() {
+    ssize_t ret;
+
+    if (op_vec_index_) {
+        ret = pwritev(fd_.get(), cowop_vec_.get(), op_vec_index_, current_op_pos_);
+        if (ret != (op_vec_index_ * sizeof(CowOperation))) {
+            PLOG(ERROR) << "pwritev failed for CowOperation. Expected: "
+                        << (op_vec_index_ * sizeof(CowOperation));
+            return false;
+        }
+    }
+
+    if (data_vec_index_) {
+        ret = pwritev(fd_.get(), data_vec_.get(), data_vec_index_, current_data_pos_);
+        if (ret != total_data_written_) {
+            PLOG(ERROR) << "pwritev failed for data. Expected: " << total_data_written_;
+            return false;
+        }
+    }
+
+    total_data_written_ = 0;
+    op_vec_index_ = 0;
+    data_vec_index_ = 0;
+    current_op_pos_ = next_op_pos_;
+    current_data_pos_ = next_data_pos_;
+
+    return true;
+}
+
+bool CowWriter::WriteOperation(const CowOperation& op, const void* data, size_t size) {
+    if (!EnsureSpaceAvailable(next_op_pos_ + sizeof(op))) {
+        return false;
+    }
+    if (!EnsureSpaceAvailable(next_data_pos_ + size)) {
+        return false;
+    }
+
+    if (batch_write_) {
+        CowOperation* cow_op = reinterpret_cast<CowOperation*>(cowop_vec_[op_vec_index_].iov_base);
+        std::memcpy(cow_op, &op, sizeof(CowOperation));
+        op_vec_index_ += 1;
+
+        if (data != nullptr && size > 0) {
+            struct iovec* data_ptr = data_vec_.get();
+            std::memcpy(data_ptr[data_vec_index_].iov_base, data, size);
+            data_ptr[data_vec_index_].iov_len = size;
+            data_vec_index_ += 1;
+            total_data_written_ += size;
+        }
+    } else {
+        if (lseek(fd_.get(), next_op_pos_, SEEK_SET) < 0) {
+            PLOG(ERROR) << "lseek failed for writing operation.";
+            return false;
+        }
+        if (!android::base::WriteFully(fd_, reinterpret_cast<const uint8_t*>(&op), sizeof(op))) {
+            return false;
+        }
+        if (data != nullptr && size > 0) {
+            if (!WriteRawData(data, size)) return false;
+        }
+    }
+
+    AddOperation(op);
+
+    if (batch_write_) {
+        if (op_vec_index_ == header_.cluster_ops || data_vec_index_ == header_.cluster_ops ||
+            op.type == kCowLabelOp || op.type == kCowClusterOp) {
+            if (!FlushCluster()) {
+                LOG(ERROR) << "Failed to flush cluster data";
+                return false;
+            }
+        }
+    }
+
+    return EmitClusterIfNeeded();
+}
+
+void CowWriter::AddOperation(const CowOperation& op) {
+    footer_.op.num_ops++;
+
+    if (op.type == kCowClusterOp) {
+        current_cluster_size_ = 0;
+        current_data_size_ = 0;
+    } else if (header_.cluster_ops) {
+        current_cluster_size_ += sizeof(op);
+        current_data_size_ += op.data_length;
+    }
+
+    next_data_pos_ += op.data_length + GetNextDataOffset(op, header_.cluster_ops);
+    next_op_pos_ += sizeof(CowOperation) + GetNextOpOffset(op, header_.cluster_ops);
+}
+
+bool CowWriter::WriteRawData(const void* data, const size_t size) {
+    if (!android::base::WriteFullyAtOffset(fd_, data, size, next_data_pos_)) {
+        return false;
+    }
+    return true;
+}
+
+bool CowWriter::Sync() {
+    if (is_dev_null_) {
+        return true;
+    }
+    if (fsync(fd_.get()) < 0) {
+        PLOG(ERROR) << "fsync failed";
+        return false;
+    }
+    return true;
+}
+
+bool CowWriter::Truncate(off_t length) {
+    if (is_dev_null_ || is_block_device_) {
+        return true;
+    }
+    if (ftruncate(fd_.get(), length) < 0) {
+        PLOG(ERROR) << "Failed to truncate.";
+        return false;
+    }
+    return true;
+}
+
+}  // namespace snapshot
+}  // namespace android
diff --git a/fs_mgr/libsnapshot/inspect_cow.cpp b/fs_mgr/libsnapshot/libsnapshot_cow/inspect_cow.cpp
similarity index 100%
rename from fs_mgr/libsnapshot/inspect_cow.cpp
rename to fs_mgr/libsnapshot/libsnapshot_cow/inspect_cow.cpp
diff --git a/fs_mgr/libsnapshot/snapshot_writer.cpp b/fs_mgr/libsnapshot/snapshot_writer.cpp
index 48b7d80..82a7fd7 100644
--- a/fs_mgr/libsnapshot/snapshot_writer.cpp
+++ b/fs_mgr/libsnapshot/snapshot_writer.cpp
@@ -93,6 +93,9 @@
 
 std::unique_ptr<FileDescriptor> CompressedSnapshotWriter::OpenReader() {
     auto cow = OpenCowReader();
+    if (cow == nullptr) {
+        return nullptr;
+    }
 
     auto reader = std::make_unique<CompressedSnapshotReader>();
     if (!reader->SetCow(std::move(cow))) {
@@ -111,8 +114,9 @@
     return reader;
 }
 
-bool CompressedSnapshotWriter::EmitCopy(uint64_t new_block, uint64_t old_block) {
-    return cow_->AddCopy(new_block, old_block);
+bool CompressedSnapshotWriter::EmitCopy(uint64_t new_block, uint64_t old_block,
+                                        uint64_t num_blocks) {
+    return cow_->AddCopy(new_block, old_block, num_blocks);
 }
 
 bool CompressedSnapshotWriter::EmitRawBlocks(uint64_t new_block_start, const void* data,
@@ -191,19 +195,29 @@
     return true;
 }
 
-bool OnlineKernelSnapshotWriter::EmitCopy(uint64_t new_block, uint64_t old_block) {
+bool OnlineKernelSnapshotWriter::EmitCopy(uint64_t new_block, uint64_t old_block,
+                                          uint64_t num_blocks) {
     auto source_fd = GetSourceFd();
     if (source_fd < 0) {
         return false;
     }
 
-    std::string buffer(options_.block_size, 0);
-    uint64_t offset = old_block * options_.block_size;
-    if (!android::base::ReadFullyAtOffset(source_fd, buffer.data(), buffer.size(), offset)) {
-        PLOG(ERROR) << "EmitCopy read";
-        return false;
+    CHECK(num_blocks != 0);
+
+    for (size_t i = 0; i < num_blocks; i++) {
+        std::string buffer(options_.block_size, 0);
+        uint64_t offset = (old_block + i) * options_.block_size;
+        if (!android::base::ReadFullyAtOffset(source_fd, buffer.data(), buffer.size(), offset)) {
+            PLOG(ERROR) << "EmitCopy read";
+            return false;
+        }
+        if (!EmitRawBlocks(new_block + i, buffer.data(), buffer.size())) {
+            PLOG(ERROR) << "EmitRawBlocks failed";
+            return false;
+        }
     }
-    return EmitRawBlocks(new_block, buffer.data(), buffer.size());
+
+    return true;
 }
 
 bool OnlineKernelSnapshotWriter::EmitLabel(uint64_t) {
diff --git a/fs_mgr/libsnapshot/snapshotctl.cpp b/fs_mgr/libsnapshot/snapshotctl.cpp
index 67189d4..ad3f83c 100644
--- a/fs_mgr/libsnapshot/snapshotctl.cpp
+++ b/fs_mgr/libsnapshot/snapshotctl.cpp
@@ -25,9 +25,27 @@
 #include <android-base/logging.h>
 #include <android-base/unique_fd.h>
 
+#include <fs_mgr.h>
+#include <fs_mgr_dm_linear.h>
+#include <fstab/fstab.h>
+#include <liblp/builder.h>
+#include <libsnapshot/cow_format.h>
 #include <libsnapshot/snapshot.h>
+#include <storage_literals/storage_literals.h>
 
+#ifdef SNAPSHOTCTL_USERDEBUG_OR_ENG
+#include <BootControlClient.h>
+#endif
+
+using namespace std::chrono_literals;
 using namespace std::string_literals;
+using namespace android::storage_literals;
+using android::fs_mgr::CreateLogicalPartitionParams;
+using android::fs_mgr::FindPartition;
+using android::fs_mgr::GetPartitionSize;
+using android::fs_mgr::PartitionOpener;
+using android::fs_mgr::ReadMetadata;
+using android::fs_mgr::SlotNumberForSlotSuffix;
 
 int Usage() {
     std::cerr << "snapshotctl: Control snapshots.\n"
@@ -67,11 +85,136 @@
     return false;
 }
 
+#ifdef SNAPSHOTCTL_USERDEBUG_OR_ENG
+bool CreateTestUpdate(SnapshotManager* sm) {
+    chromeos_update_engine::DeltaArchiveManifest manifest;
+
+    // We only copy system, to simplify things.
+    manifest.set_partial_update(true);
+
+    auto dap = manifest.mutable_dynamic_partition_metadata();
+    dap->set_snapshot_enabled(true);
+    dap->set_vabc_enabled(true);
+    dap->set_vabc_compression_param("none");
+    dap->set_cow_version(kCowVersionMajor);
+
+    auto source_slot = fs_mgr_get_slot_suffix();
+    auto source_slot_number = SlotNumberForSlotSuffix(source_slot);
+    auto target_slot = fs_mgr_get_other_slot_suffix();
+    auto target_slot_number = SlotNumberForSlotSuffix(target_slot);
+    auto super_source = fs_mgr_get_super_partition_name(source_slot_number);
+
+    // Get current partition information.
+    PartitionOpener opener;
+    auto source_metadata = ReadMetadata(opener, super_source, source_slot_number);
+    if (!source_metadata) {
+        std::cerr << "Could not read source partition metadata.\n";
+        return false;
+    }
+
+    auto system_source_name = "system" + source_slot;
+    auto system_source = FindPartition(*source_metadata.get(), system_source_name);
+    if (!system_source) {
+        std::cerr << "Could not find system partition: " << system_source_name << ".\n";
+        return false;
+    }
+    auto system_source_size = GetPartitionSize(*source_metadata.get(), *system_source);
+
+    // Since we only add copy operations, 64MB should be enough.
+    auto system_update = manifest.mutable_partitions()->Add();
+    system_update->set_partition_name("system");
+    system_update->set_estimate_cow_size(64_MiB);
+    system_update->mutable_new_partition_info()->set_size(system_source_size);
+
+    if (!sm->CreateUpdateSnapshots(manifest)) {
+        std::cerr << "Could not create update snapshots.\n";
+        return false;
+    }
+
+    // Write the "new" system partition.
+    auto system_target_name = "system" + target_slot;
+    auto source_device = "/dev/block/mapper/" + system_source_name;
+    CreateLogicalPartitionParams clpp = {
+            .block_device = fs_mgr_get_super_partition_name(target_slot_number),
+            .metadata_slot = {target_slot_number},
+            .partition_name = system_target_name,
+            .partition_opener = &opener,
+            .timeout_ms = 10s,
+    };
+    auto writer = sm->OpenSnapshotWriter(clpp, {source_device});
+    if (!writer) {
+        std::cerr << "Could not open snapshot writer.\n";
+        return false;
+    }
+    if (!writer->Initialize()) {
+        std::cerr << "Could not initialize snapshot for writing.\n";
+        return false;
+    }
+
+    for (uint64_t block = 0; block < system_source_size / 4096; block++) {
+        if (!writer->AddCopy(block, block)) {
+            std::cerr << "Unable to add copy operation for block " << block << ".\n";
+            return false;
+        }
+    }
+    if (!writer->Finalize()) {
+        std::cerr << "Could not finalize COW for " << system_target_name << ".\n";
+        return false;
+    }
+    writer = nullptr;
+
+    // Finished writing this partition, unmap.
+    if (!sm->UnmapUpdateSnapshot(system_target_name)) {
+        std::cerr << "Could not unmap snapshot for " << system_target_name << ".\n";
+        return false;
+    }
+
+    // All snapshots have been written.
+    if (!sm->FinishedSnapshotWrites(false /* wipe */)) {
+        std::cerr << "Could not finalize snapshot writes.\n";
+        return false;
+    }
+
+    auto hal = hal::BootControlClient::WaitForService();
+    if (!hal) {
+        std::cerr << "Could not find IBootControl HAL.\n";
+        return false;
+    }
+    auto cr = hal->SetActiveBootSlot(target_slot_number);
+    if (!cr.IsOk()) {
+        std::cerr << "Could not set active boot slot: " << cr.errMsg;
+        return false;
+    }
+
+    std::cerr << "It is now safe to reboot your device. If using a physical device, make\n"
+              << "sure that all physical partitions are flashed to both A and B slots.\n";
+    return true;
+}
+
+bool TestOtaHandler(int /* argc */, char** /* argv */) {
+    auto sm = SnapshotManager::New();
+
+    if (!sm->BeginUpdate()) {
+        std::cerr << "Error starting update.\n";
+        return false;
+    }
+
+    if (!CreateTestUpdate(sm.get())) {
+        sm->CancelUpdate();
+        return false;
+    }
+    return true;
+}
+#endif
+
 static std::map<std::string, std::function<bool(int, char**)>> kCmdMap = {
         // clang-format off
         {"dump", DumpCmdHandler},
         {"merge", MergeCmdHandler},
         {"map", MapCmdHandler},
+#ifdef SNAPSHOTCTL_USERDEBUG_OR_ENG
+        {"test-blank-ota", TestOtaHandler},
+#endif
         {"unmap", UnmapCmdHandler},
         // clang-format on
 };
diff --git a/fs_mgr/libsnapshot/utility.cpp b/fs_mgr/libsnapshot/utility.cpp
index 0a1be0d..a98bf0e 100644
--- a/fs_mgr/libsnapshot/utility.cpp
+++ b/fs_mgr/libsnapshot/utility.cpp
@@ -17,6 +17,7 @@
 #include <errno.h>
 #include <time.h>
 
+#include <filesystem>
 #include <iomanip>
 #include <sstream>
 
@@ -152,20 +153,52 @@
     }
 }
 
-bool WriteStringToFileAtomic(const std::string& content, const std::string& path) {
-    std::string tmp_path = path + ".tmp";
-    if (!android::base::WriteStringToFile(content, tmp_path)) {
+bool FsyncDirectory(const char* dirname) {
+    android::base::unique_fd fd(TEMP_FAILURE_RETRY(open(dirname, O_RDONLY | O_CLOEXEC)));
+    if (fd == -1) {
+        PLOG(ERROR) << "Failed to open " << dirname;
         return false;
     }
+    if (fsync(fd) == -1) {
+        if (errno == EROFS || errno == EINVAL) {
+            PLOG(WARNING) << "Skip fsync " << dirname
+                          << " on a file system does not support synchronization";
+        } else {
+            PLOG(ERROR) << "Failed to fsync " << dirname;
+            return false;
+        }
+    }
+    return true;
+}
+
+bool WriteStringToFileAtomic(const std::string& content, const std::string& path) {
+    const std::string tmp_path = path + ".tmp";
+    {
+        const int flags = O_WRONLY | O_CREAT | O_TRUNC | O_CLOEXEC | O_BINARY;
+        android::base::unique_fd fd(TEMP_FAILURE_RETRY(open(tmp_path.c_str(), flags, 0666)));
+        if (fd == -1) {
+            PLOG(ERROR) << "Failed to open " << path;
+            return false;
+        }
+        if (!android::base::WriteStringToFd(content, fd)) {
+            PLOG(ERROR) << "Failed to write to fd " << fd;
+            return false;
+        }
+        // rename() without fsync() is not safe. Data could still be living on page cache. To ensure
+        // atomiticity, call fsync()
+        if (fsync(fd) != 0) {
+            PLOG(ERROR) << "Failed to fsync " << tmp_path;
+        }
+    }
     if (rename(tmp_path.c_str(), path.c_str()) == -1) {
         PLOG(ERROR) << "rename failed from " << tmp_path << " to " << path;
         return false;
     }
-    return true;
+    return FsyncDirectory(std::filesystem::path(path).parent_path().c_str());
 }
 
 std::ostream& operator<<(std::ostream& os, const Now&) {
-    struct tm now;
+    struct tm now {};
     time_t t = time(nullptr);
     localtime_r(&t, &now);
     return os << std::put_time(&now, "%Y%m%d-%H%M%S");
diff --git a/fs_mgr/libsnapshot/utility.h b/fs_mgr/libsnapshot/utility.h
index eff6f10..8c4c7c6 100644
--- a/fs_mgr/libsnapshot/utility.h
+++ b/fs_mgr/libsnapshot/utility.h
@@ -117,6 +117,7 @@
 // Note that rename() is an atomic operation. This function may not work properly if there
 // is an open fd to |path|, because that fd has an old view of the file.
 bool WriteStringToFileAtomic(const std::string& content, const std::string& path);
+bool FsyncDirectory(const char* dirname);
 
 // Writes current time to a given stream.
 struct Now {};
diff --git a/fs_mgr/set-verity-state.cpp b/fs_mgr/set-verity-state.cpp
deleted file mode 100644
index 84ee01f..0000000
--- a/fs_mgr/set-verity-state.cpp
+++ /dev/null
@@ -1,258 +0,0 @@
-/*
- * Copyright (C) 2019 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <getopt.h>
-#include <stdio.h>
-
-#include <android-base/file.h>
-#include <android-base/logging.h>
-#include <android-base/properties.h>
-#include <binder/ProcessState.h>
-#include <cutils/android_reboot.h>
-#include <fs_mgr_overlayfs.h>
-#include <libavb_user/libavb_user.h>
-
-#include "fs_mgr_priv_overlayfs.h"
-
-using namespace std::string_literals;
-
-namespace {
-
-void print_usage() {
-    printf("Usage:\n"
-           "\tdisable-verity\n"
-           "\tenable-verity\n"
-           "\tset-verity-state [0|1]\n"
-           "Options:\n"
-           "\t-h --help\tthis help\n"
-           "\t-R --reboot\tautomatic reboot if needed for new settings to take effect\n"
-           "\t-v --verbose\tbe noisy\n");
-}
-
-#ifdef ALLOW_DISABLE_VERITY
-const bool kAllowDisableVerity = true;
-#else
-const bool kAllowDisableVerity = false;
-#endif
-
-static bool SetupOrTeardownOverlayfs(bool enable) {
-    bool want_reboot = false;
-    if (enable) {
-        if (!fs_mgr_overlayfs_setup(nullptr, &want_reboot)) {
-            LOG(ERROR) << "Overlayfs setup failed.";
-            return want_reboot;
-        }
-        if (want_reboot) {
-            printf("enabling overlayfs\n");
-        }
-    } else {
-        auto rv = fs_mgr_overlayfs_teardown(nullptr, &want_reboot);
-        if (rv == OverlayfsTeardownResult::Error) {
-            LOG(ERROR) << "Overlayfs teardown failed.";
-            return want_reboot;
-        }
-        if (rv == OverlayfsTeardownResult::Busy) {
-            LOG(ERROR) << "Overlayfs is still active until reboot.";
-            return true;
-        }
-        if (want_reboot) {
-            printf("disabling overlayfs\n");
-        }
-    }
-    return want_reboot;
-}
-
-/* Helper function to get A/B suffix, if any. If the device isn't
- * using A/B the empty string is returned. Otherwise either "_a",
- * "_b", ... is returned.
- */
-std::string get_ab_suffix() {
-    return android::base::GetProperty("ro.boot.slot_suffix", "");
-}
-
-bool is_avb_device_locked() {
-    return android::base::GetProperty("ro.boot.vbmeta.device_state", "") == "locked";
-}
-
-bool is_debuggable() {
-    return android::base::GetBoolProperty("ro.debuggable", false);
-}
-
-bool is_using_avb() {
-    // Figure out if we're using VB1.0 or VB2.0 (aka AVB) - by
-    // contract, androidboot.vbmeta.digest is set by the bootloader
-    // when using AVB).
-    return !android::base::GetProperty("ro.boot.vbmeta.digest", "").empty();
-}
-
-[[noreturn]] void reboot(const std::string& name) {
-    LOG(INFO) << "Rebooting device for new settings to take effect";
-    ::sync();
-    android::base::SetProperty(ANDROID_RB_PROPERTY, "reboot," + name);
-    ::sleep(60);
-    LOG(ERROR) << "Failed to reboot";
-    ::exit(1);
-}
-
-struct SetVerityStateResult {
-    bool success = false;
-    bool want_reboot = false;
-};
-
-/* Use AVB to turn verity on/off */
-SetVerityStateResult SetVerityState(bool enable_verity) {
-    std::string ab_suffix = get_ab_suffix();
-    bool verity_enabled = false;
-
-    if (is_avb_device_locked()) {
-        LOG(ERROR) << "Device must be bootloader unlocked to change verity state";
-        return {};
-    }
-
-    std::unique_ptr<AvbOps, decltype(&avb_ops_user_free)> ops(avb_ops_user_new(),
-                                                              &avb_ops_user_free);
-    if (!ops) {
-        LOG(ERROR) << "Error getting AVB ops";
-        return {};
-    }
-
-    if (!avb_user_verity_get(ops.get(), ab_suffix.c_str(), &verity_enabled)) {
-        LOG(ERROR) << "Error getting verity state";
-        return {};
-    }
-
-    if ((verity_enabled && enable_verity) || (!verity_enabled && !enable_verity)) {
-        LOG(INFO) << "Verity is already " << (verity_enabled ? "enabled" : "disabled");
-        return {.success = true, .want_reboot = false};
-    }
-
-    if (!avb_user_verity_set(ops.get(), ab_suffix.c_str(), enable_verity)) {
-        LOG(ERROR) << "Error setting verity state";
-        return {};
-    }
-
-    LOG(INFO) << "Successfully " << (enable_verity ? "enabled" : "disabled") << " verity";
-    return {.success = true, .want_reboot = true};
-}
-
-class MyLogger {
-  public:
-    explicit MyLogger(bool verbose) : verbose_(verbose) {}
-
-    void operator()(android::base::LogId id, android::base::LogSeverity severity, const char* tag,
-                    const char* file, unsigned int line, const char* message) {
-        // Hide log starting with '[fs_mgr]' unless it's an error.
-        if (verbose_ || severity >= android::base::ERROR || message[0] != '[') {
-            fprintf(stderr, "%s\n", message);
-        }
-        logd_(id, severity, tag, file, line, message);
-    }
-
-  private:
-    android::base::LogdLogger logd_;
-    bool verbose_;
-};
-
-}  // namespace
-
-int main(int argc, char* argv[]) {
-    bool auto_reboot = false;
-    bool verbose = false;
-
-    struct option longopts[] = {
-            {"help", no_argument, nullptr, 'h'},
-            {"reboot", no_argument, nullptr, 'R'},
-            {"verbose", no_argument, nullptr, 'v'},
-            {0, 0, nullptr, 0},
-    };
-    for (int opt; (opt = ::getopt_long(argc, argv, "hRv", longopts, nullptr)) != -1;) {
-        switch (opt) {
-            case 'h':
-                print_usage();
-                return 0;
-            case 'R':
-                auto_reboot = true;
-                break;
-            case 'v':
-                verbose = true;
-                break;
-            default:
-                print_usage();
-                return 1;
-        }
-    }
-
-    android::base::InitLogging(argv, MyLogger(verbose));
-
-    bool enable_verity = false;
-    const std::string progname = getprogname();
-    if (progname == "enable-verity") {
-        enable_verity = true;
-    } else if (progname == "disable-verity") {
-        enable_verity = false;
-    } else if (optind < argc && (argv[optind] == "1"s || argv[optind] == "0"s)) {
-        // progname "set-verity-state"
-        enable_verity = (argv[optind] == "1"s);
-    } else {
-        print_usage();
-        return 1;
-    }
-
-    if (!kAllowDisableVerity || !is_debuggable()) {
-        errno = EPERM;
-        PLOG(ERROR) << "Cannot disable/enable verity on user build";
-        return 1;
-    }
-
-    if (getuid() != 0) {
-        errno = EACCES;
-        PLOG(ERROR) << "Must be running as root (adb root)";
-        return 1;
-    }
-
-    if (!is_using_avb()) {
-        LOG(ERROR) << "Expected AVB device, VB1.0 is no longer supported";
-        return 1;
-    }
-
-    int exit_code = 0;
-    bool want_reboot = false;
-
-    auto ret = SetVerityState(enable_verity);
-    if (ret.success) {
-        want_reboot |= ret.want_reboot;
-    } else {
-        exit_code = 1;
-    }
-
-    // Disable any overlayfs unconditionally if we want verity enabled.
-    // Enable overlayfs only if verity is successfully disabled or is already disabled.
-    if (enable_verity || ret.success) {
-        // Start a threadpool to service waitForService() callbacks as
-        // fs_mgr_overlayfs_* might call waitForService() to get the image service.
-        android::ProcessState::self()->startThreadPool();
-        want_reboot |= SetupOrTeardownOverlayfs(!enable_verity);
-    }
-
-    if (want_reboot) {
-        if (auto_reboot) {
-            reboot(progname);
-        }
-        printf("Reboot the device for new settings to take effect\n");
-    }
-
-    return exit_code;
-}
diff --git a/fs_mgr/tests/adb-remount-test.sh b/fs_mgr/tests/adb-remount-test.sh
index eba4f6e..c87e564 100755
--- a/fs_mgr/tests/adb-remount-test.sh
+++ b/fs_mgr/tests/adb-remount-test.sh
@@ -1422,9 +1422,12 @@
 LOG RUN "flash vendor, and confirm vendor override disappears"
 
 is_bootloader_fastboot=true
-# cuttlefish?
-[[ "$(get_property ro.product.device)" == vsoc* ]] &&
-  is_bootloader_fastboot=false
+# virtual device?
+case "$(get_property ro.product.vendor.device)" in
+  vsoc_* | emulator_* | emulator64_*)
+    is_bootloader_fastboot=false
+    ;;
+esac
 is_userspace_fastboot=false
 
 if ! ${is_bootloader_fastboot}; then
diff --git a/fs_mgr/tests/vts_fs_test.cpp b/fs_mgr/tests/vts_fs_test.cpp
index b8b34e2..bb2ceb9 100644
--- a/fs_mgr/tests/vts_fs_test.cpp
+++ b/fs_mgr/tests/vts_fs_test.cpp
@@ -66,6 +66,14 @@
 
     int vsr_level = GetVsrLevel();
 
+    std::vector<std::string> must_be_f2fs;
+    if (vsr_level >= __ANDROID_API_T__) {
+        must_be_f2fs.emplace_back("/data");
+    }
+    if (vsr_level >= __ANDROID_API_U__) {
+        must_be_f2fs.emplace_back("/metadata");
+    }
+
     for (const auto& entry : fstab) {
         std::string parent_bdev = entry.blk_device;
         while (true) {
@@ -99,15 +107,15 @@
         }
 
         if (entry.flags & MS_RDONLY) {
-            std::vector<std::string> allowed = {"erofs", "ext4"};
-            if (vsr_level == __ANDROID_API_T__) {
-                allowed.emplace_back("f2fs");
-            }
+            std::vector<std::string> allowed = {"erofs", "ext4", "f2fs"};
 
             EXPECT_NE(std::find(allowed.begin(), allowed.end(), entry.fs_type), allowed.end())
                     << entry.mount_point;
         } else {
-            EXPECT_NE(entry.fs_type, "ext4") << entry.mount_point;
+            if (std::find(must_be_f2fs.begin(), must_be_f2fs.end(), entry.mount_point) !=
+                must_be_f2fs.end()) {
+                EXPECT_EQ(entry.fs_type, "f2fs") << entry.mount_point;
+            }
         }
     }
 }
diff --git a/fs_mgr/tools/dmctl.cpp b/fs_mgr/tools/dmctl.cpp
index 62ca162..10efd0c 100644
--- a/fs_mgr/tools/dmctl.cpp
+++ b/fs_mgr/tools/dmctl.cpp
@@ -33,6 +33,7 @@
 #include <ios>
 #include <iostream>
 #include <map>
+#include <optional>
 #include <sstream>
 #include <string>
 #include <vector>
@@ -183,6 +184,8 @@
             }
             std::string control_device = NextArg();
             return std::make_unique<DmTargetUser>(start_sector, num_sectors, control_device);
+        } else if (target_type == "error") {
+            return std::make_unique<DmTargetError>(start_sector, num_sectors);
         } else {
             std::cerr << "Unrecognized target type: " << target_type << std::endl;
             return nullptr;
@@ -206,16 +209,26 @@
     char** argv_;
 };
 
-static bool parse_table_args(DmTable* table, int argc, char** argv) {
+struct TableArgs {
+    DmTable table;
+    bool suspended = false;
+};
+
+static std::optional<TableArgs> parse_table_args(int argc, char** argv) {
+    TableArgs out;
+
     // Parse extended options first.
     int arg_index = 1;
     while (arg_index < argc && argv[arg_index][0] == '-') {
         if (strcmp(argv[arg_index], "-ro") == 0) {
-            table->set_readonly(true);
+            out.table.set_readonly(true);
+            arg_index++;
+        } else if (strcmp(argv[arg_index], "-suspended") == 0) {
+            out.suspended = true;
             arg_index++;
         } else {
             std::cerr << "Unrecognized option: " << argv[arg_index] << std::endl;
-            return -EINVAL;
+            return {};
         }
     }
 
@@ -223,37 +236,44 @@
     TargetParser parser(argc - arg_index, argv + arg_index);
     while (parser.More()) {
         std::unique_ptr<DmTarget> target = parser.Next();
-        if (!target || !table->AddTarget(std::move(target))) {
-            return -EINVAL;
+        if (!target || !out.table.AddTarget(std::move(target))) {
+            return {};
         }
     }
 
-    if (table->num_targets() == 0) {
+    if (out.table.num_targets() == 0) {
         std::cerr << "Must define at least one target." << std::endl;
-        return -EINVAL;
+        return {};
     }
-    return 0;
+    return {std::move(out)};
 }
 
 static int DmCreateCmdHandler(int argc, char** argv) {
     if (argc < 1) {
-        std::cerr << "Usage: dmctl create <dm-name> [-ro] <targets...>" << std::endl;
+        std::cerr << "Usage: dmctl create <dm-name> [--suspended] [-ro] <targets...>" << std::endl;
         return -EINVAL;
     }
     std::string name = argv[0];
 
-    DmTable table;
-    int ret = parse_table_args(&table, argc, argv);
-    if (ret) {
-        return ret;
+    auto table_args = parse_table_args(argc, argv);
+    if (!table_args) {
+        return -EINVAL;
     }
 
     std::string ignore_path;
     DeviceMapper& dm = DeviceMapper::Instance();
-    if (!dm.CreateDevice(name, table, &ignore_path, 5s)) {
+    if (!dm.CreateEmptyDevice(name)) {
         std::cerr << "Failed to create device-mapper device with name: " << name << std::endl;
         return -EIO;
     }
+    if (!dm.LoadTable(name, table_args->table)) {
+        std::cerr << "Failed to load table for dm device: " << name << std::endl;
+        return -EIO;
+    }
+    if (!table_args->suspended && !dm.ChangeState(name, DmDeviceState::ACTIVE)) {
+        std::cerr << "Failed to activate table for " << name << std::endl;
+        return -EIO;
+    }
     return 0;
 }
 
@@ -269,7 +289,6 @@
         std::cerr << "Failed to delete [" << name << "]" << std::endl;
         return -EIO;
     }
-
     return 0;
 }
 
@@ -280,17 +299,20 @@
     }
     std::string name = argv[0];
 
-    DmTable table;
-    int ret = parse_table_args(&table, argc, argv);
-    if (ret) {
-        return ret;
+    auto table_args = parse_table_args(argc, argv);
+    if (!table_args) {
+        return -EINVAL;
     }
 
     DeviceMapper& dm = DeviceMapper::Instance();
-    if (!dm.LoadTableAndActivate(name, table)) {
+    if (!dm.LoadTable(name, table_args->table)) {
         std::cerr << "Failed to replace device-mapper table to: " << name << std::endl;
         return -EIO;
     }
+    if (!table_args->suspended && !dm.ChangeState(name, DmDeviceState::ACTIVE)) {
+        std::cerr << "Failed to activate table for " << name << std::endl;
+        return -EIO;
+    }
     return 0;
 }
 
diff --git a/fs_mgr/tools/dmuserd.cpp b/fs_mgr/tools/dmuserd.cpp
index 6b68b28..da7156c 100644
--- a/fs_mgr/tools/dmuserd.cpp
+++ b/fs_mgr/tools/dmuserd.cpp
@@ -13,6 +13,7 @@
 #include <sys/prctl.h>
 #include <unistd.h>
 #include <iostream>
+#include <string>
 
 #define SECTOR_SIZE ((__u64)512)
 #define BUFFER_BYTES 4096
@@ -133,16 +134,16 @@
     return 0;
 }
 
-int simple_daemon(char* control_path, char* backing_path) {
-    int control_fd = open(control_path, O_RDWR);
+static int simple_daemon(const std::string& control_path, const std::string& backing_path) {
+    int control_fd = open(control_path.c_str(), O_RDWR);
     if (control_fd < 0) {
-        fprintf(stderr, "Unable to open control device %s\n", control_path);
+        fprintf(stderr, "Unable to open control device %s\n", control_path.c_str());
         return -1;
     }
 
-    int backing_fd = open(backing_path, O_RDWR);
+    int backing_fd = open(backing_path.c_str(), O_RDWR);
     if (backing_fd < 0) {
-        fprintf(stderr, "Unable to open backing device %s\n", backing_path);
+        fprintf(stderr, "Unable to open backing device %s\n", backing_path.c_str());
         return -1;
     }
 
@@ -286,8 +287,8 @@
 }
 
 int main(int argc, char* argv[]) {
-    char* control_path = NULL;
-    char* backing_path = NULL;
+    std::string control_path;
+    std::string backing_path;
     char* store;
     int c;
 
@@ -299,10 +300,10 @@
                 usage(basename(argv[0]));
                 exit(0);
             case 'c':
-                control_path = strdup(optarg);
+                control_path = optarg;
                 break;
             case 'b':
-                backing_path = strdup(optarg);
+                backing_path = optarg;
                 break;
             case 'v':
                 verbose = true;
diff --git a/init/Android.bp b/init/Android.bp
index f6f1e8c..c7e7de8 100644
--- a/init/Android.bp
+++ b/init/Android.bp
@@ -39,6 +39,7 @@
     "epoll.cpp",
     "import_parser.cpp",
     "interface_utils.cpp",
+    "interprocess_fifo.cpp",
     "keychords.cpp",
     "parser.cpp",
     "property_type.cpp",
@@ -108,21 +109,22 @@
         misc_undefined: ["signed-integer-overflow"],
     },
     cflags: [
-        "-DLOG_UEVENTS=0",
-        "-Wall",
-        "-Wextra",
-        "-Wno-unused-parameter",
-        "-Werror",
-        "-Wthread-safety",
         "-DALLOW_FIRST_STAGE_CONSOLE=0",
         "-DALLOW_LOCAL_PROP_OVERRIDE=0",
         "-DALLOW_PERMISSIVE_SELINUX=0",
-        "-DREBOOT_BOOTLOADER_ON_PANIC=0",
-        "-DWORLD_WRITABLE_KMSG=0",
+        "-DANDROID_BASE_UNIQUE_FD_DISABLE_IMPLICIT_CONVERSION",
         "-DDUMP_ON_UMOUNT_FAILURE=0",
-        "-DSHUTDOWN_ZERO_TIMEOUT=0",
         "-DINIT_FULL_SOURCES",
         "-DINSTALL_DEBUG_POLICY_TO_SYSTEM_EXT=0",
+        "-DLOG_UEVENTS=0",
+        "-DREBOOT_BOOTLOADER_ON_PANIC=0",
+        "-DSHUTDOWN_ZERO_TIMEOUT=0",
+        "-DWORLD_WRITABLE_KMSG=0",
+        "-Wall",
+        "-Werror",
+        "-Wextra",
+        "-Wno-unused-parameter",
+        "-Wthread-safety",
     ],
     product_variables: {
         debuggable: {
@@ -467,6 +469,7 @@
         "epoll_test.cpp",
         "firmware_handler_test.cpp",
         "init_test.cpp",
+        "interprocess_fifo_test.cpp",
         "keychords_test.cpp",
         "oneshot_on_test.cpp",
         "persistent_properties_test.cpp",
@@ -481,7 +484,10 @@
         "ueventd_test.cpp",
         "util_test.cpp",
     ],
-    static_libs: ["libinit"],
+    static_libs: [
+        "libgmock",
+        "libinit",
+    ],
 
     test_suites: [
         "cts",
diff --git a/init/README.md b/init/README.md
index 7b3d32a..957eb9e 100644
--- a/init/README.md
+++ b/init/README.md
@@ -162,6 +162,17 @@
     setprop e 1
     setprop f 2
 
+If the property `true` wasn't `true` when the `boot` was triggered, then the
+order of the commands executed will be:
+
+    setprop a 1
+    setprop b 2
+    setprop e 1
+    setprop f 2
+
+If the property `true` becomes `true` *AFTER* `boot` was triggered, nothing will
+be executed. The condition `boot && property:true=true` will be evaluated to
+false because the `boot` trigger is a past event.
 
 Services
 --------
@@ -184,8 +195,10 @@
   capability without the "CAP\_" prefix, like "NET\_ADMIN" or "SETPCAP". See
   http://man7.org/linux/man-pages/man7/capabilities.7.html for a list of Linux
   capabilities.
-  If no capabilities are provided, then all capabilities are removed from this service, even if it
-  runs as root.
+  If no capabilities are provided, then behaviour depends on the user the service runs under:
+    * if it's root, then the service will run with all the capabitilies (note: whether the
+        service can actually use them is controlled by selinux);
+    * otherwise all capabilities will be dropped.
 
 `class <name> [ <name>\* ]`
 > Specify class names for the service.  All services in a
@@ -368,8 +381,9 @@
   given console.
 
 `task_profiles <profile> [ <profile>\* ]`
-> Set task profiles for the process when it forks. This is designed to replace the use of
-  writepid option for moving a process into a cgroup.
+> Set task profiles. Before Android U, the profiles are applied to the main thread of the service.
+  For Android U and later, the profiles are applied to the entire service process. This is designed
+  to replace the use of writepid option for moving a process into a cgroup.
 
 `timeout_period <seconds>`
 > Provide a timeout after which point the service will be killed. The oneshot keyword is respected
@@ -398,7 +412,7 @@
   using this new mechanism, processes can use the user option to
   select their desired uid without ever running as root.
   As of Android O, processes can also request capabilities directly in their .rc
-  files. See the "capabilities" option below.
+  files. See the "capabilities" option above.
 
 `writepid <file> [ <file>\* ]`
 > Write the child's pid to the given files when it forks. Meant for
@@ -432,7 +446,9 @@
 
 For example:
 `on boot && property:a=b` defines an action that is only executed when
-the 'boot' event trigger happens and the property a equals b.
+the 'boot' event trigger happens and the property a equals b at the moment. This
+will NOT be executed when the property a transitions to value b after the `boot`
+event was triggered.
 
 `on property:a=b && property:c=d` defines an action that is executed
 at three times:
diff --git a/init/builtins.cpp b/init/builtins.cpp
index c8cb253..a89813e 100644
--- a/init/builtins.cpp
+++ b/init/builtins.cpp
@@ -331,13 +331,13 @@
     unique_fd s(TEMP_FAILURE_RETRY(socket(AF_INET, SOCK_DGRAM | SOCK_CLOEXEC, 0)));
     if (s < 0) return ErrnoError() << "opening socket failed";
 
-    if (ioctl(s, SIOCGIFFLAGS, &ifr) < 0) {
+    if (ioctl(s.get(), SIOCGIFFLAGS, &ifr) < 0) {
         return ErrnoError() << "ioctl(..., SIOCGIFFLAGS, ...) failed";
     }
 
     ifr.ifr_flags |= IFF_UP;
 
-    if (ioctl(s, SIOCSIFFLAGS, &ifr) < 0) {
+    if (ioctl(s.get(), SIOCSIFFLAGS, &ifr) < 0) {
         return ErrnoError() << "ioctl(..., SIOCSIFFLAGS, ...) failed";
     }
 
@@ -516,11 +516,11 @@
 
             loop_info info;
             /* if it is a blank loop device */
-            if (ioctl(loop, LOOP_GET_STATUS, &info) < 0 && errno == ENXIO) {
+            if (ioctl(loop.get(), LOOP_GET_STATUS, &info) < 0 && errno == ENXIO) {
                 /* if it becomes our loop device */
-                if (ioctl(loop, LOOP_SET_FD, fd.get()) >= 0) {
+                if (ioctl(loop.get(), LOOP_SET_FD, fd.get()) >= 0) {
                     if (mount(tmp.c_str(), target, system, flags, options) < 0) {
-                        ioctl(loop, LOOP_CLR_FD, 0);
+                        ioctl(loop.get(), LOOP_CLR_FD, 0);
                         return ErrnoError() << "mount() failed";
                     }
                     return {};
@@ -879,6 +879,8 @@
             SetProperty("partition." + partition + ".verified.hash_alg", hashtree_info->algorithm);
             SetProperty("partition." + partition + ".verified.root_digest",
                         hashtree_info->root_digest);
+            SetProperty("partition." + partition + ".verified.check_at_most_once",
+                        hashtree_info->check_at_most_once ? "1" : "0");
         }
     }
 
@@ -899,16 +901,16 @@
     if (fd == -1) {
         return ErrnoError() << "Error opening file";
     }
-    if (posix_fadvise(fd, 0, 0, POSIX_FADV_WILLNEED)) {
+    if (posix_fadvise(fd.get(), 0, 0, POSIX_FADV_WILLNEED)) {
         return ErrnoError() << "Error posix_fadvise file";
     }
-    if (readahead(fd, 0, std::numeric_limits<size_t>::max())) {
+    if (readahead(fd.get(), 0, std::numeric_limits<size_t>::max())) {
         return ErrnoError() << "Error readahead file";
     }
     if (fully) {
         char buf[BUFSIZ];
         ssize_t n;
-        while ((n = TEMP_FAILURE_RETRY(read(fd, &buf[0], sizeof(buf)))) > 0) {
+        while ((n = TEMP_FAILURE_RETRY(read(fd.get(), &buf[0], sizeof(buf)))) > 0) {
         }
         if (n != 0) {
             return ErrnoError() << "Error reading file";
diff --git a/init/devices.cpp b/init/devices.cpp
index 28406f6..8bc6e52 100644
--- a/init/devices.cpp
+++ b/init/devices.cpp
@@ -470,7 +470,11 @@
         MakeDevice(devpath, block, major, minor, links);
     }
 
-    // We don't have full device-mapper information until a change event is fired.
+    // Handle device-mapper nodes.
+    // On kernels <= 5.10, the "add" event is fired on DM_DEV_CREATE, but does not contain name
+    // information until DM_TABLE_LOAD - thus, we wait for a "change" event.
+    // On kernels >= 5.15, the "add" event is fired on DM_TABLE_LOAD, followed by a "change"
+    // event.
     if (action == "add" || (action == "change" && StartsWith(devpath, "/dev/block/dm-"))) {
         for (const auto& link : links) {
             if (!mkdir_recursive(Dirname(link), 0755)) {
diff --git a/init/epoll.cpp b/init/epoll.cpp
index 0580f86..cd73a0c 100644
--- a/init/epoll.cpp
+++ b/init/epoll.cpp
@@ -45,19 +45,19 @@
         return Error() << "Must specify events";
     }
 
-    Info info;
-    info.events = events;
-    info.handler = std::make_shared<decltype(handler)>(std::move(handler));
-    auto [it, inserted] = epoll_handlers_.emplace(fd, std::move(info));
+    auto [it, inserted] = epoll_handlers_.emplace(
+            fd, Info{
+                        .events = events,
+                        .handler = std::move(handler),
+                });
     if (!inserted) {
         return Error() << "Cannot specify two epoll handlers for a given FD";
     }
-    epoll_event ev;
-    ev.events = events;
-    // std::map's iterators do not get invalidated until erased, so we use the
-    // pointer to the std::function in the map directly for epoll_ctl.
-    ev.data.ptr = reinterpret_cast<void*>(&it->second);
-    if (epoll_ctl(epoll_fd_, EPOLL_CTL_ADD, fd, &ev) == -1) {
+    epoll_event ev = {
+            .events = events,
+            .data.fd = fd,
+    };
+    if (epoll_ctl(epoll_fd_.get(), EPOLL_CTL_ADD, fd, &ev) == -1) {
         Result<void> result = ErrnoError() << "epoll_ctl failed to add fd";
         epoll_handlers_.erase(fd);
         return result;
@@ -66,40 +66,54 @@
 }
 
 Result<void> Epoll::UnregisterHandler(int fd) {
-    if (epoll_ctl(epoll_fd_, EPOLL_CTL_DEL, fd, nullptr) == -1) {
+    if (epoll_ctl(epoll_fd_.get(), EPOLL_CTL_DEL, fd, nullptr) == -1) {
         return ErrnoError() << "epoll_ctl failed to remove fd";
     }
-    if (epoll_handlers_.erase(fd) != 1) {
+    auto it = epoll_handlers_.find(fd);
+    if (it == epoll_handlers_.end()) {
         return Error() << "Attempting to remove epoll handler for FD without an existing handler";
     }
+    to_remove_.insert(it->first);
     return {};
 }
 
-Result<std::vector<std::shared_ptr<Epoll::Handler>>> Epoll::Wait(
-        std::optional<std::chrono::milliseconds> timeout) {
+void Epoll::SetFirstCallback(std::function<void()> first_callback) {
+    first_callback_ = std::move(first_callback);
+}
+
+Result<int> Epoll::Wait(std::optional<std::chrono::milliseconds> timeout) {
     int timeout_ms = -1;
     if (timeout && timeout->count() < INT_MAX) {
         timeout_ms = timeout->count();
     }
     const auto max_events = epoll_handlers_.size();
     epoll_event ev[max_events];
-    auto num_events = TEMP_FAILURE_RETRY(epoll_wait(epoll_fd_, ev, max_events, timeout_ms));
+    auto num_events = TEMP_FAILURE_RETRY(epoll_wait(epoll_fd_.get(), ev, max_events, timeout_ms));
     if (num_events == -1) {
         return ErrnoError() << "epoll_wait failed";
     }
-    std::vector<std::shared_ptr<Handler>> pending_functions;
+    if (num_events > 0 && first_callback_) {
+        first_callback_();
+    }
     for (int i = 0; i < num_events; ++i) {
-        auto& info = *reinterpret_cast<Info*>(ev[i].data.ptr);
+        const auto it = epoll_handlers_.find(ev[i].data.fd);
+        if (it == epoll_handlers_.end()) {
+            continue;
+        }
+        const Info& info = it->second;
         if ((info.events & (EPOLLIN | EPOLLPRI)) == (EPOLLIN | EPOLLPRI) &&
             (ev[i].events & EPOLLIN) != ev[i].events) {
             // This handler wants to know about exception events, and just got one.
             // Log something informational.
             LOG(ERROR) << "Received unexpected epoll event set: " << ev[i].events;
         }
-        pending_functions.emplace_back(info.handler);
+        info.handler();
+        for (auto fd : to_remove_) {
+            epoll_handlers_.erase(fd);
+        }
+        to_remove_.clear();
     }
-
-    return pending_functions;
+    return num_events;
 }
 
 }  // namespace init
diff --git a/init/epoll.h b/init/epoll.h
index f58ae8d..1e71803 100644
--- a/init/epoll.h
+++ b/init/epoll.h
@@ -24,6 +24,7 @@
 #include <map>
 #include <memory>
 #include <optional>
+#include <unordered_set>
 #include <vector>
 
 #include <android-base/unique_fd.h>
@@ -42,17 +43,19 @@
     Result<void> Open();
     Result<void> RegisterHandler(int fd, Handler handler, uint32_t events = EPOLLIN);
     Result<void> UnregisterHandler(int fd);
-    Result<std::vector<std::shared_ptr<Handler>>> Wait(
-            std::optional<std::chrono::milliseconds> timeout);
+    void SetFirstCallback(std::function<void()> first_callback);
+    Result<int> Wait(std::optional<std::chrono::milliseconds> timeout);
 
   private:
     struct Info {
-        std::shared_ptr<Handler> handler;
+        Handler handler;
         uint32_t events;
     };
 
     android::base::unique_fd epoll_fd_;
     std::map<int, Info> epoll_handlers_;
+    std::function<void()> first_callback_;
+    std::unordered_set<int> to_remove_;
 };
 
 }  // namespace init
diff --git a/init/epoll_test.cpp b/init/epoll_test.cpp
index 9236cd5..7105a68 100644
--- a/init/epoll_test.cpp
+++ b/init/epoll_test.cpp
@@ -21,6 +21,7 @@
 #include <unordered_set>
 
 #include <android-base/file.h>
+#include <android-base/logging.h>
 #include <gtest/gtest.h>
 
 namespace android {
@@ -30,14 +31,10 @@
 
 class CatchDtor final {
   public:
-    CatchDtor() { sValidObjects.emplace(this); }
-    CatchDtor(const CatchDtor&) { sValidObjects.emplace(this); }
-    ~CatchDtor() {
-        auto iter = sValidObjects.find(this);
-        if (iter != sValidObjects.end()) {
-            sValidObjects.erase(iter);
-        }
-    }
+    CatchDtor() { CHECK(sValidObjects.emplace(this).second); }
+    CatchDtor(const CatchDtor&) { CHECK(sValidObjects.emplace(this).second); }
+    CatchDtor(const CatchDtor&&) { CHECK(sValidObjects.emplace(this).second); }
+    ~CatchDtor() { CHECK_EQ(sValidObjects.erase(this), size_t{1}); }
 };
 
 TEST(epoll, UnregisterHandler) {
@@ -48,11 +45,13 @@
     ASSERT_EQ(pipe(fds), 0);
 
     CatchDtor catch_dtor;
-    bool handler_invoked;
+    bool handler_invoked = false;
     auto handler = [&, catch_dtor]() -> void {
         auto result = epoll.UnregisterHandler(fds[0]);
         ASSERT_EQ(result.ok(), !handler_invoked);
         handler_invoked = true;
+        // The assert statement below verifies that the UnregisterHandler() call
+        // above did not destroy the current std::function<> instance.
         ASSERT_NE(sValidObjects.find((void*)&catch_dtor), sValidObjects.end());
     };
 
@@ -61,14 +60,9 @@
     uint8_t byte = 0xee;
     ASSERT_TRUE(android::base::WriteFully(fds[1], &byte, sizeof(byte)));
 
-    auto results = epoll.Wait({});
-    ASSERT_RESULT_OK(results);
-    ASSERT_EQ(results->size(), size_t(1));
-
-    for (const auto& function : *results) {
-        (*function)();
-        (*function)();
-    }
+    auto epoll_result = epoll.Wait({});
+    ASSERT_RESULT_OK(epoll_result);
+    ASSERT_EQ(*epoll_result, 1);
     ASSERT_TRUE(handler_invoked);
 }
 
diff --git a/init/firmware_handler.cpp b/init/firmware_handler.cpp
index 30e808d..b9fa58c 100644
--- a/init/firmware_handler.cpp
+++ b/init/firmware_handler.cpp
@@ -257,12 +257,12 @@
             return false;
         }
         struct stat sb;
-        if (fstat(fw_fd, &sb) == -1) {
+        if (fstat(fw_fd.get(), &sb) == -1) {
             attempted_paths_and_errors.emplace_back("firmware: attempted " + file +
                                                     ", fstat failed: " + strerror(errno));
             return false;
         }
-        LoadFirmware(firmware, root, fw_fd, sb.st_size, loading_fd, data_fd);
+        LoadFirmware(firmware, root, fw_fd.get(), sb.st_size, loading_fd.get(), data_fd.get());
         return true;
     };
 
@@ -287,7 +287,7 @@
     }
 
     // Write "-1" as our response to the kernel's firmware request, since we have nothing for it.
-    write(loading_fd, "-1", 2);
+    write(loading_fd.get(), "-1", 2);
 }
 
 bool FirmwareHandler::ForEachFirmwareDirectory(
diff --git a/init/host_init_stubs.h b/init/host_init_stubs.h
index 2a8bf6c..753ed6b 100644
--- a/init/host_init_stubs.h
+++ b/init/host_init_stubs.h
@@ -29,6 +29,9 @@
 #define __ANDROID_API_P__ 28
 #define __ANDROID_API_Q__ 29
 #define __ANDROID_API_R__ 30
+#define __ANDROID_API_S__ 31
+#define __ANDROID_API_T__ 33
+#define __ANDROID_API_U__ 34
 
 // sys/system_properties.h
 #define PROP_VALUE_MAX 92
diff --git a/init/init.cpp b/init/init.cpp
index ce668d7..4262191 100644
--- a/init/init.cpp
+++ b/init/init.cpp
@@ -513,7 +513,7 @@
 }
 
 static Result<void> DoLoadApex(const std::string& apex_name) {
-    if(auto result = ParseApexConfigs(apex_name); !result.ok()) {
+    if (auto result = ParseApexConfigs(apex_name); !result.ok()) {
         return result.error();
     }
 
@@ -662,6 +662,10 @@
 }
 
 static Result<void> SetupCgroupsAction(const BuiltinArguments&) {
+    if (!CgroupsAvailable()) {
+        LOG(INFO) << "Cgroups support in kernel is not enabled";
+        return {};
+    }
     // Have to create <CGROUPS_RC_DIR> using make_dir function
     // for appropriate sepolicy to be set for it
     make_dir(android::base::Dirname(CGROUPS_RC_PATH), 0711);
@@ -735,30 +739,13 @@
     HandlePowerctlMessage("shutdown,container");
 }
 
-static constexpr std::chrono::milliseconds kDiagnosticTimeout = 10s;
-
-static void HandleSignalFd(bool one_off) {
+static void HandleSignalFd() {
     signalfd_siginfo siginfo;
-    auto started = std::chrono::steady_clock::now();
-    do {
-        ssize_t bytes_read = TEMP_FAILURE_RETRY(read(signal_fd, &siginfo, sizeof(siginfo)));
-        if (bytes_read < 0 && errno == EAGAIN) {
-            auto now = std::chrono::steady_clock::now();
-            std::chrono::duration<double> waited = now - started;
-            if (waited >= kDiagnosticTimeout) {
-                LOG(ERROR) << "epoll() woke us up, but we waited with no SIGCHLD!";
-                started = now;
-            }
-
-            std::this_thread::sleep_for(100ms);
-            continue;
-        }
-        if (bytes_read != sizeof(siginfo)) {
-            PLOG(ERROR) << "Failed to read siginfo from signal_fd";
-            return;
-        }
-        break;
-    } while (!one_off);
+    ssize_t bytes_read = TEMP_FAILURE_RETRY(read(signal_fd, &siginfo, sizeof(siginfo)));
+    if (bytes_read != sizeof(siginfo)) {
+        PLOG(ERROR) << "Failed to read siginfo from signal_fd";
+        return;
+    }
 
     switch (siginfo.ssi_signo) {
         case SIGCHLD:
@@ -768,7 +755,7 @@
             HandleSigtermSignal(siginfo);
             break;
         default:
-            PLOG(ERROR) << "signal_fd: received unexpected signal " << siginfo.ssi_signo;
+            LOG(ERROR) << "signal_fd: received unexpected signal " << siginfo.ssi_signo;
             break;
     }
 }
@@ -813,14 +800,13 @@
         LOG(FATAL) << "Failed to register a fork handler: " << strerror(result);
     }
 
-    signal_fd = signalfd(-1, &mask, SFD_CLOEXEC | SFD_NONBLOCK);
+    signal_fd = signalfd(-1, &mask, SFD_CLOEXEC);
     if (signal_fd == -1) {
         PLOG(FATAL) << "failed to create signalfd";
     }
 
     constexpr int flags = EPOLLIN | EPOLLPRI;
-    auto handler = std::bind(HandleSignalFd, false);
-    if (auto result = epoll->RegisterHandler(signal_fd, handler, flags); !result.ok()) {
+    if (auto result = epoll->RegisterHandler(signal_fd, HandleSignalFd, flags); !result.ok()) {
         LOG(FATAL) << result.error();
     }
 }
@@ -949,32 +935,6 @@
     return {};
 }
 
-static void DumpPidFds(const std::string& prefix, pid_t pid) {
-    std::error_code ec;
-    std::string proc_dir = "/proc/" + std::to_string(pid) + "/fd";
-    for (const auto& entry : std::filesystem::directory_iterator(proc_dir)) {
-        std::string target;
-        if (android::base::Readlink(entry.path(), &target)) {
-            LOG(ERROR) << prefix << target;
-        } else {
-            LOG(ERROR) << prefix << entry.path();
-        }
-    }
-}
-
-static void DumpFile(const std::string& prefix, const std::string& file) {
-    std::ifstream fp(file);
-    if (!fp) {
-        LOG(ERROR) << "Could not open " << file;
-        return;
-    }
-
-    std::string line;
-    while (std::getline(fp, line)) {
-        LOG(ERROR) << prefix << line;
-    }
-}
-
 int SecondStageMain(int argc, char** argv) {
     if (REBOOT_BOOTLOADER_ON_PANIC) {
         InstallRebootSignalHandlers();
@@ -1061,6 +1021,11 @@
         PLOG(FATAL) << result.error();
     }
 
+    // We always reap children before responding to the other pending functions. This is to
+    // prevent a race where other daemons see that a service has exited and ask init to
+    // start it again via ctl.start before init has reaped it.
+    epoll.SetFirstCallback(ReapAnyOutstandingChildren);
+
     InstallSignalFdHandler(&epoll);
     InstallInitNotifier(&epoll);
     StartPropertyService(&property_fd);
@@ -1143,7 +1108,7 @@
     setpriority(PRIO_PROCESS, 0, 0);
     while (true) {
         // By default, sleep until something happens.
-        auto epoll_timeout = std::optional<std::chrono::milliseconds>{kDiagnosticTimeout};
+        std::optional<std::chrono::milliseconds> epoll_timeout;
 
         auto shutdown_command = shutdown_state.CheckShutdown();
         if (shutdown_command) {
@@ -1163,7 +1128,7 @@
             if (next_process_action_time) {
                 epoll_timeout = std::chrono::ceil<std::chrono::milliseconds>(
                         *next_process_action_time - boot_clock::now());
-                if (*epoll_timeout < 0ms) epoll_timeout = 0ms;
+                if (epoll_timeout < 0ms) epoll_timeout = 0ms;
             }
         }
 
@@ -1172,36 +1137,9 @@
             if (am.HasMoreCommands()) epoll_timeout = 0ms;
         }
 
-        auto pending_functions = epoll.Wait(epoll_timeout);
-        if (!pending_functions.ok()) {
-            LOG(ERROR) << pending_functions.error();
-        } else if (!pending_functions->empty()) {
-            // We always reap children before responding to the other pending functions. This is to
-            // prevent a race where other daemons see that a service has exited and ask init to
-            // start it again via ctl.start before init has reaped it.
-            ReapAnyOutstandingChildren();
-            for (const auto& function : *pending_functions) {
-                (*function)();
-            }
-        } else if (Service::is_exec_service_running()) {
-            static bool dumped_diagnostics = false;
-            std::chrono::duration<double> waited =
-                    std::chrono::steady_clock::now() - Service::exec_service_started();
-            if (waited >= kDiagnosticTimeout) {
-                LOG(ERROR) << "Exec service is hung? Waited " << waited.count()
-                           << " without SIGCHLD";
-                if (!dumped_diagnostics) {
-                    DumpPidFds("exec service opened: ", Service::exec_service_pid());
-
-                    std::string status_file =
-                            "/proc/" + std::to_string(Service::exec_service_pid()) + "/status";
-                    DumpFile("exec service: ", status_file);
-                    dumped_diagnostics = true;
-
-                    LOG(INFO) << "Attempting to handle any stuck SIGCHLDs...";
-                    HandleSignalFd(true);
-                }
-            }
+        auto epoll_result = epoll.Wait(epoll_timeout);
+        if (!epoll_result.ok()) {
+            LOG(ERROR) << epoll_result.error();
         }
         if (!IsShuttingDown()) {
             HandleControlMessages();
diff --git a/init/init_test.cpp b/init/init_test.cpp
index 5c1e9ef..18a08c7 100644
--- a/init/init_test.cpp
+++ b/init/init_test.cpp
@@ -193,6 +193,36 @@
     EXPECT_TRUE(service->is_override());
 }
 
+TEST(init, StartConsole) {
+    if (GetProperty("ro.build.type", "") == "user") {
+        GTEST_SKIP() << "Must run on userdebug/eng builds. b/262090304";
+        return;
+    }
+    std::string init_script = R"init(
+service console /system/bin/sh
+    class core
+    console null
+    disabled
+    user root
+    group root shell log readproc
+    seclabel u:r:shell:s0
+    setenv HOSTNAME console
+)init";
+
+    ActionManager action_manager;
+    ServiceList service_list;
+    TestInitText(init_script, BuiltinFunctionMap(), {}, &action_manager, &service_list);
+    ASSERT_EQ(std::distance(service_list.begin(), service_list.end()), 1);
+
+    auto service = service_list.begin()->get();
+    ASSERT_NE(service, nullptr);
+    ASSERT_RESULT_OK(service->Start());
+    const pid_t pid = service->pid();
+    ASSERT_GT(pid, 0);
+    EXPECT_NE(getsid(pid), 0);
+    service->Stop();
+}
+
 static std::string GetSecurityContext() {
     char* ctx;
     if (getcon(&ctx) == -1) {
diff --git a/init/interprocess_fifo.cpp b/init/interprocess_fifo.cpp
new file mode 100644
index 0000000..6e0d031
--- /dev/null
+++ b/init/interprocess_fifo.cpp
@@ -0,0 +1,96 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "interprocess_fifo.h"
+
+#include <android-base/logging.h>
+
+#include <unistd.h>
+
+using ::android::base::ErrnoError;
+using ::android::base::Error;
+using ::android::base::Result;
+
+namespace android {
+namespace init {
+
+InterprocessFifo::InterprocessFifo() noexcept : fds_({-1, -1}) {}
+
+InterprocessFifo::InterprocessFifo(InterprocessFifo&& orig) noexcept : fds_({-1, -1}) {
+    std::swap(fds_, orig.fds_);
+}
+
+InterprocessFifo::~InterprocessFifo() noexcept {
+    Close();
+}
+
+void InterprocessFifo::CloseFd(int& fd) noexcept {
+    if (fd >= 0) {
+        close(fd);
+        fd = -1;
+    }
+}
+
+void InterprocessFifo::CloseReadFd() noexcept {
+    CloseFd(fds_[0]);
+}
+
+void InterprocessFifo::CloseWriteFd() noexcept {
+    CloseFd(fds_[1]);
+}
+
+void InterprocessFifo::Close() noexcept {
+    CloseReadFd();
+    CloseWriteFd();
+}
+
+Result<void> InterprocessFifo::Initialize() noexcept {
+    if (fds_[0] >= 0) {
+        return Error() << "already initialized";
+    }
+    if (pipe(fds_.data()) < 0) {  // NOLINT(android-cloexec-pipe)
+        return ErrnoError() << "pipe()";
+    }
+    return {};
+}
+
+Result<uint8_t> InterprocessFifo::Read() noexcept {
+    uint8_t byte;
+    ssize_t count = read(fds_[0], &byte, 1);
+    if (count < 0) {
+        return ErrnoError() << "read()";
+    }
+    if (count == 0) {
+        return Error() << "read() EOF";
+    }
+    DCHECK_EQ(count, 1);
+    return byte;
+}
+
+Result<void> InterprocessFifo::Write(uint8_t byte) noexcept {
+    ssize_t written = write(fds_[1], &byte, 1);
+    if (written < 0) {
+        return ErrnoError() << "write()";
+    }
+    if (written == 0) {
+        return Error() << "write() EOF";
+    }
+    DCHECK_EQ(written, 1);
+    return {};
+}
+
+}  // namespace init
+}  // namespace android
diff --git a/init/interprocess_fifo.h b/init/interprocess_fifo.h
new file mode 100644
index 0000000..cdaac86
--- /dev/null
+++ b/init/interprocess_fifo.h
@@ -0,0 +1,52 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <array>
+
+#include <android-base/result.h>
+
+namespace android {
+namespace init {
+
+// A FIFO for inter-process communication that uses a Unix pipe internally.
+class InterprocessFifo {
+  public:
+    template <typename T>
+    using Result = ::android::base::Result<T>;
+
+    InterprocessFifo() noexcept;
+    InterprocessFifo(const InterprocessFifo& orig) noexcept = delete;
+    InterprocessFifo(InterprocessFifo&& orig) noexcept;
+    InterprocessFifo& operator=(const InterprocessFifo& orig) noexcept = delete;
+    InterprocessFifo& operator=(InterprocessFifo&& orig) noexcept = delete;
+    ~InterprocessFifo() noexcept;
+    void CloseReadFd() noexcept;
+    void CloseWriteFd() noexcept;
+    void Close() noexcept;
+    Result<void> Initialize() noexcept;
+    Result<void> Write(uint8_t byte) noexcept;
+    Result<uint8_t> Read() noexcept;
+
+  private:
+    static void CloseFd(int& fd) noexcept;
+
+    std::array<int, 2> fds_;
+};
+
+}  // namespace init
+}  // namespace android
diff --git a/init/interprocess_fifo_test.cpp b/init/interprocess_fifo_test.cpp
new file mode 100644
index 0000000..81cfbac
--- /dev/null
+++ b/init/interprocess_fifo_test.cpp
@@ -0,0 +1,53 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "interprocess_fifo.h"
+
+#include <android-base/result-gmock.h>
+#include <gtest/gtest.h>
+
+#define ASSERT_OK(e) ASSERT_THAT(e, Ok())
+#define ASSERT_NOT_OK(e) ASSERT_THAT(e, Not(Ok()))
+
+using ::android::base::Result;
+using ::android::base::testing::Ok;
+using ::testing::Not;
+
+namespace android {
+namespace init {
+
+TEST(FifoTest, WriteAndRead) {
+    InterprocessFifo fifo;
+    ASSERT_OK(fifo.Initialize());
+    ASSERT_OK(fifo.Write('a'));
+    ASSERT_OK(fifo.Write('b'));
+    Result<uint8_t> result = fifo.Read();
+    ASSERT_OK(result);
+    EXPECT_EQ(*result, 'a');
+    result = fifo.Read();
+    ASSERT_OK(result);
+    EXPECT_EQ(*result, 'b');
+    InterprocessFifo fifo2 = std::move(fifo);
+    ASSERT_NOT_OK(fifo.Write('c'));
+    ASSERT_NOT_OK(fifo.Read());
+    ASSERT_OK(fifo2.Write('d'));
+    result = fifo2.Read();
+    ASSERT_OK(result);
+    EXPECT_EQ(*result, 'd');
+}
+
+}  // namespace init
+}  // namespace android
diff --git a/init/keychords_test.cpp b/init/keychords_test.cpp
index 8a333a2..5789bf5 100644
--- a/init/keychords_test.cpp
+++ b/init/keychords_test.cpp
@@ -212,11 +212,8 @@
 }
 
 void TestFrame::RelaxForMs(std::chrono::milliseconds wait) {
-    auto pending_functions = epoll_.Wait(wait);
-    ASSERT_RESULT_OK(pending_functions);
-    for (const auto& function : *pending_functions) {
-        (*function)();
-    }
+    auto epoll_result = epoll_.Wait(wait);
+    ASSERT_RESULT_OK(epoll_result);
 }
 
 void TestFrame::SetChord(int key, bool value) {
diff --git a/init/persistent_properties.cpp b/init/persistent_properties.cpp
index d33a6b8..8db7267 100644
--- a/init/persistent_properties.cpp
+++ b/init/persistent_properties.cpp
@@ -77,7 +77,7 @@
         }
 
         struct stat sb;
-        if (fstat(fd, &sb) == -1) {
+        if (fstat(fd.get(), &sb) == -1) {
             PLOG(ERROR) << "fstat on property file \"" << entry->d_name << "\" failed";
             continue;
         }
@@ -198,7 +198,7 @@
     if (!WriteStringToFd(serialized_string, fd)) {
         return ErrnoError() << "Unable to write file contents";
     }
-    fsync(fd);
+    fsync(fd.get());
     fd.reset();
 
     if (rename(temp_filename.c_str(), persistent_property_filename.c_str())) {
@@ -216,7 +216,7 @@
     if (dir_fd < 0) {
         return ErrnoError() << "Unable to open persistent properties directory for fsync()";
     }
-    fsync(dir_fd);
+    fsync(dir_fd.get());
 
     return {};
 }
diff --git a/init/property_service.cpp b/init/property_service.cpp
index c2ba8d5..9df9828 100644
--- a/init/property_service.cpp
+++ b/init/property_service.cpp
@@ -300,13 +300,13 @@
         if (!socket_.ok()) {
             return true;
         }
-        int result = TEMP_FAILURE_RETRY(send(socket_, &value, sizeof(value), 0));
+        int result = TEMP_FAILURE_RETRY(send(socket_.get(), &value, sizeof(value), 0));
         return result == sizeof(value);
     }
 
     bool GetSourceContext(std::string* source_context) const {
         char* c_source_context = nullptr;
-        if (getpeercon(socket_, &c_source_context) != 0) {
+        if (getpeercon(socket_.get(), &c_source_context) != 0) {
             return false;
         }
         *source_context = c_source_context;
@@ -320,13 +320,13 @@
 
   private:
     bool PollIn(uint32_t* timeout_ms) {
-        struct pollfd ufds[1];
-        ufds[0].fd = socket_;
-        ufds[0].events = POLLIN;
-        ufds[0].revents = 0;
+        struct pollfd ufd = {
+                .fd = socket_.get(),
+                .events = POLLIN,
+        };
         while (*timeout_ms > 0) {
             auto start_time = std::chrono::steady_clock::now();
-            int nr = poll(ufds, 1, *timeout_ms);
+            int nr = poll(&ufd, 1, *timeout_ms);
             auto now = std::chrono::steady_clock::now();
             auto time_elapsed =
                 std::chrono::duration_cast<std::chrono::milliseconds>(now - start_time);
@@ -368,7 +368,7 @@
                 return false;
             }
 
-            int result = TEMP_FAILURE_RETRY(recv(socket_, data, bytes_left, MSG_DONTWAIT));
+            int result = TEMP_FAILURE_RETRY(recv(socket_.get(), data, bytes_left, MSG_DONTWAIT));
             if (result <= 0) {
                 PLOG(ERROR) << "sys_prop: recv error";
                 return false;
@@ -1381,13 +1381,9 @@
     }
 
     while (true) {
-        auto pending_functions = epoll.Wait(std::nullopt);
-        if (!pending_functions.ok()) {
-            LOG(ERROR) << pending_functions.error();
-        } else {
-            for (const auto& function : *pending_functions) {
-                (*function)();
-            }
+        auto epoll_result = epoll.Wait(std::nullopt);
+        if (!epoll_result.ok()) {
+            LOG(ERROR) << epoll_result.error();
         }
     }
 }
diff --git a/init/reboot.cpp b/init/reboot.cpp
index 4c27a56..a3fc534 100644
--- a/init/reboot.cpp
+++ b/init/reboot.cpp
@@ -567,6 +567,11 @@
 }
 
 static Result<void> UnmountAllApexes() {
+    // don't need to unmount because apexd doesn't use /data in Microdroid
+    if (IsMicrodroid()) {
+        return {};
+    }
+
     const char* args[] = {"/system/bin/apexd", "--unmount-all"};
     int status;
     if (logwrap_fork_execvp(arraysize(args), args, &status, false, LOG_KLOG, true, nullptr) != 0) {
@@ -762,7 +767,7 @@
     if (IsDataMounted("f2fs")) {
         uint32_t flag = F2FS_GOING_DOWN_FULLSYNC;
         unique_fd fd(TEMP_FAILURE_RETRY(open("/data", O_RDONLY)));
-        int ret = ioctl(fd, F2FS_IOC_SHUTDOWN, &flag);
+        int ret = ioctl(fd.get(), F2FS_IOC_SHUTDOWN, &flag);
         if (ret) {
             PLOG(ERROR) << "Shutdown /data: ";
         } else {
diff --git a/init/security.cpp b/init/security.cpp
index 0e9f6c2..6e616be 100644
--- a/init/security.cpp
+++ b/init/security.cpp
@@ -116,6 +116,13 @@
     if (SetMmapRndBitsMin(33, 24, false) && (!Has32BitAbi() || SetMmapRndBitsMin(16, 16, true))) {
         return {};
     }
+#elif defined(__riscv)
+    // TODO: sv48 and sv57 were both added to the kernel this year, so we
+    // probably just need some kernel fixes to enable higher ASLR randomization,
+    // but for now 24 is the maximum that the kernel supports.
+    if (SetMmapRndBitsMin(24, 18, false)) {
+        return {};
+    }
 #elif defined(__x86_64__)
     // x86_64 supports 28 - 32 rnd bits, but Android wants to ensure that the
     // theoretical maximum of 32 bits is always supported and used.
@@ -209,7 +216,7 @@
         return {};
     }
 
-    int ioctl_ret = ioctl(fd, PERF_EVENT_IOC_RESET);
+    int ioctl_ret = ioctl(fd.get(), PERF_EVENT_IOC_RESET);
     if (ioctl_ret != -1) {
         // Success implies that the kernel doesn't have the hooks.
         return {};
diff --git a/init/selinux.cpp b/init/selinux.cpp
index ab5b0a0..ea308aa 100644
--- a/init/selinux.cpp
+++ b/init/selinux.cpp
@@ -567,7 +567,7 @@
         return ErrnoError() << "Failed to open " << dstPath;
     }
 
-    ret = ExtractEntryToFile(archive, &entry, fd);
+    ret = ExtractEntryToFile(archive, &entry, fd.get());
     if (ret != 0) {
         return Error() << "Failed to extract entry \"" << fileName << "\" ("
                        << entry.uncompressed_length << " bytes) to \"" << dstPath
@@ -785,7 +785,7 @@
         return;
     }
 
-    TEMP_FAILURE_RETRY(send(fd, &request, sizeof(request), 0));
+    TEMP_FAILURE_RETRY(send(fd.get(), &request, sizeof(request), 0));
 }
 
 }  // namespace
diff --git a/init/service.cpp b/init/service.cpp
index a633048..b9b3309 100644
--- a/init/service.cpp
+++ b/init/service.cpp
@@ -16,6 +16,7 @@
 
 #include "service.h"
 
+#include <errno.h>
 #include <fcntl.h>
 #include <inttypes.h>
 #include <linux/securebits.h>
@@ -38,6 +39,7 @@
 
 #include <string>
 
+#include "interprocess_fifo.h"
 #include "lmkd_service.h"
 #include "service_list.h"
 #include "util.h"
@@ -134,8 +136,6 @@
 
 unsigned long Service::next_start_order_ = 1;
 bool Service::is_exec_service_running_ = false;
-pid_t Service::exec_service_pid_ = -1;
-std::chrono::time_point<std::chrono::steady_clock> Service::exec_service_started_;
 
 Service::Service(const std::string& name, Subcontext* subcontext_for_restart_commands,
                  const std::string& filename, const std::vector<std::string>& args)
@@ -225,7 +225,7 @@
     }
 }
 
-void Service::SetProcessAttributesAndCaps() {
+void Service::SetProcessAttributesAndCaps(InterprocessFifo setsid_finished) {
     // Keep capabilites on uid change.
     if (capabilities_ && proc_attr_.uid) {
         // If Android is running in a container, some securebits might already
@@ -240,7 +240,7 @@
         }
     }
 
-    if (auto result = SetProcessAttributes(proc_attr_); !result.ok()) {
+    if (auto result = SetProcessAttributes(proc_attr_, std::move(setsid_finished)); !result.ok()) {
         LOG(FATAL) << "cannot set attribute for " << name_ << ": " << result.error();
     }
 
@@ -290,7 +290,8 @@
     }
 
     if ((siginfo.si_code != CLD_EXITED || siginfo.si_status != 0) && on_failure_reboot_target_) {
-        LOG(ERROR) << "Service with 'reboot_on_failure' option failed, shutting down system.";
+        LOG(ERROR) << "Service " << name_
+                   << " has 'reboot_on_failure' option and failed, shutting down system.";
         trigger_shutdown(*on_failure_reboot_target_);
     }
 
@@ -431,8 +432,6 @@
 
     flags_ |= SVC_EXEC;
     is_exec_service_running_ = true;
-    exec_service_pid_ = pid_;
-    exec_service_started_ = std::chrono::steady_clock::now();
 
     LOG(INFO) << "SVC_EXEC service '" << name_ << "' pid " << pid_ << " (uid " << proc_attr_.uid
               << " gid " << proc_attr_.gid << "+" << proc_attr_.supp_gids.size() << " context "
@@ -442,14 +441,6 @@
     return {};
 }
 
-static void ClosePipe(const std::array<int, 2>* pipe) {
-    for (const auto fd : *pipe) {
-        if (fd >= 0) {
-            close(fd);
-        }
-    }
-}
-
 Result<void> Service::CheckConsole() {
     if (!(flags_ & SVC_CONSOLE)) {
         return {};
@@ -514,7 +505,7 @@
 
 // Enters namespaces, sets environment variables, writes PID files and runs the service executable.
 void Service::RunService(const std::vector<Descriptor>& descriptors,
-                         std::unique_ptr<std::array<int, 2>, decltype(&ClosePipe)> pipefd) {
+                         InterprocessFifo cgroups_activated, InterprocessFifo setsid_finished) {
     if (auto result = EnterNamespaces(namespaces_, name_, mount_namespace_); !result.ok()) {
         LOG(FATAL) << "Service '" << name_ << "' failed to set up namespaces: " << result.error();
     }
@@ -536,23 +527,33 @@
 
     // Wait until the cgroups have been created and until the cgroup controllers have been
     // activated.
-    char byte = 0;
-    if (read((*pipefd)[0], &byte, 1) < 0) {
-        PLOG(ERROR) << "failed to read from notification channel";
+    Result<uint8_t> byte = cgroups_activated.Read();
+    if (!byte.ok()) {
+        LOG(ERROR) << name_ << ": failed to read from notification channel: " << byte.error();
     }
-    pipefd.reset();
-    if (!byte) {
+    cgroups_activated.Close();
+    if (*byte != kCgroupsActivated) {
         LOG(FATAL) << "Service '" << name_  << "' failed to start due to a fatal error";
         _exit(EXIT_FAILURE);
     }
 
-    if (task_profiles_.size() > 0 && !SetTaskProfiles(getpid(), task_profiles_)) {
-        LOG(ERROR) << "failed to set task profiles";
+    if (task_profiles_.size() > 0) {
+        bool succeeded = SelinuxGetVendorAndroidVersion() < __ANDROID_API_U__
+                                 ?
+                                 // Compatibility mode: apply the task profiles to the current
+                                 // thread.
+                                 SetTaskProfiles(getpid(), task_profiles_)
+                                 :
+                                 // Apply the task profiles to the current process.
+                                 SetProcessProfiles(getuid(), getpid(), task_profiles_);
+        if (!succeeded) {
+            LOG(ERROR) << "failed to set task profiles";
+        }
     }
 
     // As requested, set our gid, supplemental gids, uid, context, and
     // priority. Aborts on failure.
-    SetProcessAttributesAndCaps();
+    SetProcessAttributesAndCaps(std::move(setsid_finished));
 
     if (!ExpandArgsAndExecv(args_, sigstop_)) {
         PLOG(ERROR) << "cannot execv('" << args_[0]
@@ -595,11 +596,14 @@
         return {};
     }
 
-    std::unique_ptr<std::array<int, 2>, decltype(&ClosePipe)> pipefd(new std::array<int, 2>{-1, -1},
-                                                                     ClosePipe);
-    if (pipe(pipefd->data()) < 0) {
-        return ErrnoError() << "pipe()";
-    }
+    // cgroups_activated is used for communication from the parent to the child
+    // while setsid_finished is used for communication from the child process to
+    // the parent process. These two communication channels are separate because
+    // combining these into a single communication channel would introduce a
+    // race between the Write() calls by the parent and by the child.
+    InterprocessFifo cgroups_activated, setsid_finished;
+    OR_RETURN(cgroups_activated.Initialize());
+    OR_RETURN(setsid_finished.Initialize());
 
     if (Result<void> result = CheckConsole(); !result.ok()) {
         return result;
@@ -657,8 +661,13 @@
 
     if (pid == 0) {
         umask(077);
-        RunService(descriptors, std::move(pipefd));
+        cgroups_activated.CloseWriteFd();
+        setsid_finished.CloseReadFd();
+        RunService(descriptors, std::move(cgroups_activated), std::move(setsid_finished));
         _exit(127);
+    } else {
+        cgroups_activated.CloseReadFd();
+        setsid_finished.CloseWriteFd();
     }
 
     if (pid < 0) {
@@ -682,34 +691,67 @@
     start_order_ = next_start_order_++;
     process_cgroup_empty_ = false;
 
-    bool use_memcg = swappiness_ != -1 || soft_limit_in_bytes_ != -1 || limit_in_bytes_ != -1 ||
-                      limit_percent_ != -1 || !limit_property_.empty();
-    errno = -createProcessGroup(proc_attr_.uid, pid_, use_memcg);
-    if (errno != 0) {
-        if (char byte = 0; write((*pipefd)[1], &byte, 1) < 0) {
-            return ErrnoError() << "sending notification failed";
+    if (CgroupsAvailable()) {
+        bool use_memcg = swappiness_ != -1 || soft_limit_in_bytes_ != -1 || limit_in_bytes_ != -1 ||
+                         limit_percent_ != -1 || !limit_property_.empty();
+        errno = -createProcessGroup(proc_attr_.uid, pid_, use_memcg);
+        if (errno != 0) {
+            Result<void> result = cgroups_activated.Write(kActivatingCgroupsFailed);
+            if (!result.ok()) {
+                return Error() << "Sending notification failed: " << result.error();
+            }
+            return Error() << "createProcessGroup(" << proc_attr_.uid << ", " << pid_ << ", "
+                           << use_memcg << ") failed for service '" << name_
+                           << "': " << strerror(errno);
         }
-        return Error() << "createProcessGroup(" << proc_attr_.uid << ", " << pid_
-                       << ") failed for service '" << name_ << "'";
-    }
 
-    // When the blkio controller is mounted in the v1 hierarchy, NormalIoPriority is
-    // the default (/dev/blkio). When the blkio controller is mounted in the v2 hierarchy, the
-    // NormalIoPriority profile has to be applied explicitly.
-    SetProcessProfiles(proc_attr_.uid, pid_, {"NormalIoPriority"});
+        // When the blkio controller is mounted in the v1 hierarchy, NormalIoPriority is
+        // the default (/dev/blkio). When the blkio controller is mounted in the v2 hierarchy, the
+        // NormalIoPriority profile has to be applied explicitly.
+        SetProcessProfiles(proc_attr_.uid, pid_, {"NormalIoPriority"});
 
-    if (use_memcg) {
-        ConfigureMemcg();
+        if (use_memcg) {
+            ConfigureMemcg();
+        }
     }
 
     if (oom_score_adjust_ != DEFAULT_OOM_SCORE_ADJUST) {
         LmkdRegister(name_, proc_attr_.uid, pid_, oom_score_adjust_);
     }
 
-    if (char byte = 1; write((*pipefd)[1], &byte, 1) < 0) {
-        return ErrnoError() << "sending notification failed";
+    if (Result<void> result = cgroups_activated.Write(kCgroupsActivated); !result.ok()) {
+        return Error() << "Sending cgroups activated notification failed: " << result.error();
     }
 
+    cgroups_activated.Close();
+
+    // Call setpgid() from the parent process to make sure that this call has
+    // finished before the parent process calls kill(-pgid, ...).
+    if (!RequiresConsole(proc_attr_)) {
+        if (setpgid(pid, pid) < 0) {
+            switch (errno) {
+                case EACCES:  // Child has already performed setpgid() followed by execve().
+                case ESRCH:   // Child process no longer exists.
+                    break;
+                default:
+                    PLOG(ERROR) << "setpgid() from parent failed";
+            }
+        }
+    } else {
+        // The Read() call below will return an error if the child is killed.
+        if (Result<uint8_t> result = setsid_finished.Read();
+            !result.ok() || *result != kSetSidFinished) {
+            if (!result.ok()) {
+                return Error() << "Waiting for setsid() failed: " << result.error();
+            } else {
+                return Error() << "Waiting for setsid() failed: " << static_cast<uint32_t>(*result)
+                               << " <> " << static_cast<uint32_t>(kSetSidFinished);
+            }
+        }
+    }
+
+    setsid_finished.Close();
+
     NotifyStateChange("running");
     reboot_on_failure.Disable();
     return {};
@@ -825,6 +867,8 @@
 
     if ((how != SVC_DISABLED) && (how != SVC_RESET) && (how != SVC_RESTART)) {
         // An illegal flag: default to SVC_DISABLED.
+        LOG(ERROR) << "service '" << name_ << "' requested unknown flag " << how
+                   << ", defaulting to disabling it.";
         how = SVC_DISABLED;
     }
 
diff --git a/init/service.h b/init/service.h
index ab19865..f9749d2 100644
--- a/init/service.h
+++ b/init/service.h
@@ -31,6 +31,7 @@
 
 #include "action.h"
 #include "capabilities.h"
+#include "interprocess_fifo.h"
 #include "keyword_map.h"
 #include "mount_namespace.h"
 #include "parser.h"
@@ -72,6 +73,8 @@
             const std::vector<gid_t>& supp_gids, int namespace_flags, const std::string& seclabel,
             Subcontext* subcontext_for_restart_commands, const std::string& filename,
             const std::vector<std::string>& args);
+    Service(const Service&) = delete;
+    void operator=(const Service&) = delete;
 
     static Result<std::unique_ptr<Service>> MakeTemporaryOneshotService(
             const std::vector<std::string>& args);
@@ -103,10 +106,6 @@
     size_t CheckAllCommands() const { return onrestart_.CheckAllCommands(); }
 
     static bool is_exec_service_running() { return is_exec_service_running_; }
-    static pid_t exec_service_pid() { return exec_service_pid_; }
-    static std::chrono::time_point<std::chrono::steady_clock> exec_service_started() {
-        return exec_service_started_;
-    }
 
     const std::string& name() const { return name_; }
     const std::set<std::string>& classnames() const { return classnames_; }
@@ -142,7 +141,7 @@
             flags_ &= ~SVC_ONESHOT;
         }
     }
-    Subcontext* subcontext() const { return subcontext_; }
+    const Subcontext* subcontext() const { return subcontext_; }
     const std::string& filename() const { return filename_; }
     void set_filename(const std::string& name) { filename_ = name; }
 
@@ -150,20 +149,17 @@
     void NotifyStateChange(const std::string& new_state) const;
     void StopOrReset(int how);
     void KillProcessGroup(int signal, bool report_oneshot = false);
-    void SetProcessAttributesAndCaps();
+    void SetProcessAttributesAndCaps(InterprocessFifo setsid_finished);
     void ResetFlagsForStart();
     Result<void> CheckConsole();
     void ConfigureMemcg();
-    void RunService(
-            const std::vector<Descriptor>& descriptors,
-            std::unique_ptr<std::array<int, 2>, void (*)(const std::array<int, 2>* pipe)> pipefd);
+    void RunService(const std::vector<Descriptor>& descriptors, InterprocessFifo cgroups_activated,
+                    InterprocessFifo setsid_finished);
     void SetMountNamespace();
     static unsigned long next_start_order_;
     static bool is_exec_service_running_;
-    static std::chrono::time_point<std::chrono::steady_clock> exec_service_started_;
-    static pid_t exec_service_pid_;
 
-    std::string name_;
+    const std::string name_;
     std::set<std::string> classnames_;
 
     unsigned flags_;
@@ -187,7 +183,7 @@
     // Environment variables that only get applied to the next run.
     std::vector<std::pair<std::string, std::string>> once_environment_vars_;
 
-    Subcontext* subcontext_;
+    const Subcontext* const subcontext_;
     Action onrestart_;  // Commands to execute on restart.
 
     std::vector<std::string> writepid_files_;
@@ -221,7 +217,7 @@
 
     bool updatable_ = false;
 
-    std::vector<std::string> args_;
+    const std::vector<std::string> args_;
 
     std::vector<std::function<void(const siginfo_t& siginfo)>> reap_callbacks_;
 
diff --git a/init/service_list.cpp b/init/service_list.cpp
index 3047821..937d82e 100644
--- a/init/service_list.cpp
+++ b/init/service_list.cpp
@@ -24,8 +24,8 @@
 ServiceList::ServiceList() {}
 
 ServiceList& ServiceList::GetInstance() {
-    static ServiceList instance;
-    return instance;
+    static ServiceList* instance = new ServiceList;
+    return *instance;
 }
 
 size_t ServiceList::CheckAllCommands() {
diff --git a/init/service_utils.cpp b/init/service_utils.cpp
index d19f5ee..7004d8d 100644
--- a/init/service_utils.cpp
+++ b/init/service_utils.cpp
@@ -52,7 +52,7 @@
     if (fd == -1) {
         return ErrnoError() << "Could not open namespace at " << path;
     }
-    if (setns(fd, nstype) == -1) {
+    if (setns(fd.get(), nstype) == -1) {
         return ErrnoError() << "Could not setns() namespace at " << path;
     }
     return {};
@@ -127,22 +127,22 @@
 
 void SetupStdio(bool stdio_to_kmsg) {
     auto fd = unique_fd{open("/dev/null", O_RDWR | O_CLOEXEC)};
-    dup2(fd, STDIN_FILENO);
+    dup2(fd.get(), STDIN_FILENO);
     if (stdio_to_kmsg) {
         fd.reset(open("/dev/kmsg_debug", O_WRONLY | O_CLOEXEC));
         if (fd == -1) fd.reset(open("/dev/null", O_WRONLY | O_CLOEXEC));
     }
-    dup2(fd, STDOUT_FILENO);
-    dup2(fd, STDERR_FILENO);
+    dup2(fd.get(), STDOUT_FILENO);
+    dup2(fd.get(), STDERR_FILENO);
 }
 
 void OpenConsole(const std::string& console) {
     auto fd = unique_fd{open(console.c_str(), O_RDWR | O_CLOEXEC)};
     if (fd == -1) fd.reset(open("/dev/null", O_RDWR | O_CLOEXEC));
-    ioctl(fd, TIOCSCTTY, 0);
-    dup2(fd, 0);
-    dup2(fd, 1);
-    dup2(fd, 2);
+    ioctl(fd.get(), TIOCSCTTY, 0);
+    dup2(fd.get(), 0);
+    dup2(fd.get(), 1);
+    dup2(fd.get(), 2);
 }
 
 }  // namespace
@@ -190,7 +190,7 @@
     }
 
     // Fixup as we set O_NONBLOCK for open, the intent for fd is to block reads.
-    fcntl(fd, F_SETFL, flags);
+    fcntl(fd.get(), F_SETFL, flags);
 
     return Descriptor(ANDROID_FILE_ENV_PREFIX + name, std::move(fd));
 }
@@ -232,7 +232,7 @@
     return {};
 }
 
-Result<void> SetProcessAttributes(const ProcessAttributes& attr) {
+Result<void> SetProcessAttributes(const ProcessAttributes& attr, InterprocessFifo setsid_finished) {
     if (attr.ioprio_class != IoSchedClass_NONE) {
         if (android_set_ioprio(getpid(), attr.ioprio_class, attr.ioprio_pri)) {
             PLOG(ERROR) << "failed to set pid " << getpid() << " ioprio=" << attr.ioprio_class
@@ -240,11 +240,17 @@
         }
     }
 
-    if (!attr.console.empty()) {
+    if (RequiresConsole(attr)) {
         setsid();
+        setsid_finished.Write(kSetSidFinished);
+        setsid_finished.Close();
         OpenConsole(attr.console);
     } else {
-        if (setpgid(0, getpid()) == -1) {
+        // Without PID namespaces, this call duplicates the setpgid() call from
+        // the parent process. With PID namespaces, this setpgid() call sets the
+        // process group ID for a child of the init process in the PID
+        // namespace.
+        if (setpgid(0, 0) == -1) {
             return ErrnoError() << "setpgid failed";
         }
         SetupStdio(attr.stdio_to_kmsg);
@@ -280,6 +286,15 @@
 }
 
 Result<void> WritePidToFiles(std::vector<std::string>* files) {
+    if (files->empty()) {
+        // No files to write pid to, exit early.
+        return {};
+    }
+
+    if (!CgroupsAvailable()) {
+        return Error() << "cgroups are not available";
+    }
+
     // See if there were "writepid" instructions to write to files under cpuset path.
     std::string cpuset_path;
     if (CgroupGetControllerPath("cpuset", &cpuset_path)) {
diff --git a/init/service_utils.h b/init/service_utils.h
index 65a2012..d4143aa 100644
--- a/init/service_utils.h
+++ b/init/service_utils.h
@@ -26,12 +26,20 @@
 #include <android-base/unique_fd.h>
 #include <cutils/iosched_policy.h>
 
+#include "interprocess_fifo.h"
 #include "mount_namespace.h"
 #include "result.h"
 
 namespace android {
 namespace init {
 
+// Constants used by Service::Start() for communication between parent and child.
+enum ServiceCode : uint8_t {
+    kActivatingCgroupsFailed,
+    kCgroupsActivated,
+    kSetSidFinished,
+};
+
 class Descriptor {
   public:
     Descriptor(const std::string& name, android::base::unique_fd fd)
@@ -89,7 +97,12 @@
     int priority;
     bool stdio_to_kmsg;
 };
-Result<void> SetProcessAttributes(const ProcessAttributes& attr);
+
+inline bool RequiresConsole(const ProcessAttributes& attr) {
+    return !attr.console.empty();
+}
+
+Result<void> SetProcessAttributes(const ProcessAttributes& attr, InterprocessFifo setsid_finished);
 
 Result<void> WritePidToFiles(std::vector<std::string>* files);
 
diff --git a/init/sigchld_handler.cpp b/init/sigchld_handler.cpp
index 6fc64df..f8c501f 100644
--- a/init/sigchld_handler.cpp
+++ b/init/sigchld_handler.cpp
@@ -24,6 +24,7 @@
 #include <unistd.h>
 
 #include <android-base/chrono_utils.h>
+#include <android-base/file.h>
 #include <android-base/logging.h>
 #include <android-base/scopeguard.h>
 #include <android-base/stringprintf.h>
@@ -36,6 +37,7 @@
 
 using android::base::boot_clock;
 using android::base::make_scope_guard;
+using android::base::ReadFileToString;
 using android::base::StringPrintf;
 using android::base::Timer;
 
@@ -51,8 +53,13 @@
         return 0;
     }
 
-    auto pid = siginfo.si_pid;
-    if (pid == 0) return 0;
+    const pid_t pid = siginfo.si_pid;
+    if (pid == 0) {
+        DCHECK_EQ(siginfo.si_signo, 0);
+        return 0;
+    }
+
+    DCHECK_EQ(siginfo.si_signo, SIGCHLD);
 
     // At this point we know we have a zombie pid, so we use this scopeguard to reap the pid
     // whenever the function returns from this point forward.
@@ -132,6 +139,11 @@
     }
     LOG(INFO) << "Waiting for " << pids.size() << " pids to be reaped took " << t << " with "
               << alive_pids.size() << " of them still running";
+    for (pid_t pid : pids) {
+        std::string status = "(no-such-pid)";
+        ReadFileToString(StringPrintf("/proc/%d/status", pid), &status);
+        LOG(INFO) << "Still running: " << pid << ' ' << status;
+    }
 }
 
 }  // namespace init
diff --git a/init/subcontext.cpp b/init/subcontext.cpp
index 961e006..6a095fb 100644
--- a/init/subcontext.cpp
+++ b/init/subcontext.cpp
@@ -207,7 +207,7 @@
 
         // We explicitly do not use O_CLOEXEC here, such that we can reference this FD by number
         // in the subcontext process after we exec.
-        int child_fd = dup(subcontext_socket);  // NOLINT(android-cloexec-dup)
+        int child_fd = dup(subcontext_socket.get());  // NOLINT(android-cloexec-dup)
         if (child_fd < 0) {
             PLOG(FATAL) << "Could not dup child_fd";
         }
@@ -268,12 +268,12 @@
 }
 
 Result<SubcontextReply> Subcontext::TransmitMessage(const SubcontextCommand& subcontext_command) {
-    if (auto result = SendMessage(socket_, subcontext_command); !result.ok()) {
+    if (auto result = SendMessage(socket_.get(), subcontext_command); !result.ok()) {
         Restart();
         return ErrnoError() << "Failed to send message to subcontext";
     }
 
-    auto subcontext_message = ReadMessage(socket_);
+    auto subcontext_message = ReadMessage(socket_.get());
     if (!subcontext_message.ok()) {
         Restart();
         return Error() << "Failed to receive result from subcontext: " << subcontext_message.error();
diff --git a/init/subcontext.h b/init/subcontext.h
index 8acc032..93ebace 100644
--- a/init/subcontext.h
+++ b/init/subcontext.h
@@ -36,8 +36,10 @@
 
 class Subcontext {
   public:
-    Subcontext(std::vector<std::string> path_prefixes, std::string context, bool host = false)
-        : path_prefixes_(std::move(path_prefixes)), context_(std::move(context)), pid_(0) {
+    Subcontext(std::vector<std::string> path_prefixes, std::string_view context, bool host = false)
+        : path_prefixes_(std::move(path_prefixes)),
+          context_(context.begin(), context.end()),
+          pid_(0) {
         if (!host) {
             Fork();
         }
diff --git a/init/test_upgrade_mte/mte_upgrade_test_helper.cpp b/init/test_upgrade_mte/mte_upgrade_test_helper.cpp
index 10af06b..3188337 100644
--- a/init/test_upgrade_mte/mte_upgrade_test_helper.cpp
+++ b/init/test_upgrade_mte/mte_upgrade_test_helper.cpp
@@ -22,6 +22,7 @@
 #include <sys/prctl.h>
 #include <time.h>
 #include <unistd.h>
+#include <memory>
 
 int MaybeDowngrade() {
     int res = prctl(PR_GET_TAGGED_ADDR_CTRL, 0, 0, 0, 0);
@@ -58,7 +59,7 @@
         // Disallow automatic upgrade from ASYNC mode.
         if (prctl(PR_SET_TAGGED_ADDR_CTRL, res & ~PR_MTE_TCF_SYNC, 0, 0, 0) == -1) abort();
     }
-    volatile char* f = (char*)malloc(1);
+    std::unique_ptr<volatile char[]> f(new char[1]);
     f[17] = 'x';
     char buf[1];
     read(1, buf, 1);
diff --git a/init/uevent_listener.cpp b/init/uevent_listener.cpp
index 7cd396a..5da6777 100644
--- a/init/uevent_listener.cpp
+++ b/init/uevent_listener.cpp
@@ -92,12 +92,12 @@
         LOG(FATAL) << "Could not open uevent socket";
     }
 
-    fcntl(device_fd_, F_SETFL, O_NONBLOCK);
+    fcntl(device_fd_.get(), F_SETFL, O_NONBLOCK);
 }
 
 ReadUeventResult UeventListener::ReadUevent(Uevent* uevent) const {
     char msg[UEVENT_MSG_LEN + 2];
-    int n = uevent_kernel_multicast_recv(device_fd_, msg, UEVENT_MSG_LEN);
+    int n = uevent_kernel_multicast_recv(device_fd_.get(), msg, UEVENT_MSG_LEN);
     if (n <= 0) {
         if (errno != EAGAIN && errno != EWOULDBLOCK) {
             PLOG(ERROR) << "Error reading from Uevent Fd";
@@ -184,9 +184,10 @@
                           const std::optional<std::chrono::milliseconds> relative_timeout) const {
     using namespace std::chrono;
 
-    pollfd ufd;
-    ufd.events = POLLIN;
-    ufd.fd = device_fd_;
+    pollfd ufd = {
+            .events = POLLIN,
+            .fd = device_fd_.get(),
+    };
 
     auto start_time = steady_clock::now();
 
diff --git a/init/util.cpp b/init/util.cpp
index 3d42855..bc8ea6e 100644
--- a/init/util.cpp
+++ b/init/util.cpp
@@ -120,12 +120,12 @@
 
     if (passcred) {
         int on = 1;
-        if (setsockopt(fd, SOL_SOCKET, SO_PASSCRED, &on, sizeof(on))) {
+        if (setsockopt(fd.get(), SOL_SOCKET, SO_PASSCRED, &on, sizeof(on))) {
             return ErrnoError() << "Failed to set SO_PASSCRED '" << name << "'";
         }
     }
 
-    int ret = bind(fd, (struct sockaddr *) &addr, sizeof (addr));
+    int ret = bind(fd.get(), (struct sockaddr*)&addr, sizeof(addr));
     int savederrno = errno;
 
     if (!secontext.empty()) {
@@ -145,7 +145,7 @@
     if (fchmodat(AT_FDCWD, addr.sun_path, perm, AT_SYMLINK_NOFOLLOW)) {
         return ErrnoError() << "Failed to fchmodat socket '" << addr.sun_path << "'";
     }
-    if (should_listen && listen(fd, /* use OS maximum */ 1 << 30)) {
+    if (should_listen && listen(fd.get(), /* use OS maximum */ 1 << 30)) {
         return ErrnoError() << "Failed to listen on socket '" << addr.sun_path << "'";
     }
 
@@ -168,7 +168,7 @@
     // For security reasons, disallow world-writable
     // or group-writable files.
     struct stat sb;
-    if (fstat(fd, &sb) == -1) {
+    if (fstat(fd.get(), &sb) == -1) {
         return ErrnoError() << "fstat failed()";
     }
     if ((sb.st_mode & (S_IWGRP | S_IWOTH)) != 0) {
diff --git a/janitors/OWNERS b/janitors/OWNERS
index e132f0b..d871201 100644
--- a/janitors/OWNERS
+++ b/janitors/OWNERS
@@ -1,6 +1,7 @@
 # OWNERS file for projects that don't really have owners so much as volunteer janitors.
 ccross@google.com
+cferris@google.com
 dwillemsen@google.com
 enh@google.com
 narayan@google.com
-sadafebrahimi@google.com
\ No newline at end of file
+sadafebrahimi@google.com
diff --git a/libcutils/Android.bp b/libcutils/Android.bp
index fde30ad..b135e57 100644
--- a/libcutils/Android.bp
+++ b/libcutils/Android.bp
@@ -193,6 +193,9 @@
             ],
         },
         android: {
+            sanitize: {
+                misc_undefined: ["integer"],
+            },
             static_libs: [
                 "libasync_safe",
             ],
@@ -209,32 +212,6 @@
             ],
         },
 
-        android_arm: {
-            sanitize: {
-                misc_undefined: ["integer"],
-            },
-        },
-        android_arm64: {
-            sanitize: {
-                misc_undefined: ["integer"],
-            },
-        },
-
-        android_x86: {
-            // TODO: This is to work around b/29412086.
-            // Remove once __mulodi4 is available and move the "sanitize" block
-            // to the android target.
-            sanitize: {
-                misc_undefined: [],
-            },
-        },
-
-        android_x86_64: {
-            sanitize: {
-                misc_undefined: ["integer"],
-            },
-        },
-
         // qtaguid.cpp loads libnetd_client.so with dlopen().  Since
         // the interface of libnetd_client.so may vary between AOSP
         // releases, exclude qtaguid.cpp from the VNDK-SP variant.
diff --git a/libcutils/ashmem_test.cpp b/libcutils/ashmem_test.cpp
index fb657f6..d158427 100644
--- a/libcutils/ashmem_test.cpp
+++ b/libcutils/ashmem_test.cpp
@@ -75,7 +75,7 @@
     unique_fd fd;
     ASSERT_NO_FATAL_FAILURE(TestCreateRegion(size, fd, PROT_READ | PROT_WRITE));
 
-    void *region1;
+    void* region1 = nullptr;
     ASSERT_NO_FATAL_FAILURE(TestMmap(fd, size, PROT_READ | PROT_WRITE, &region1));
 
     memcpy(region1, &data, size);
@@ -97,7 +97,7 @@
     unique_fd fd;
     ASSERT_NO_FATAL_FAILURE(TestCreateRegion(size, fd, PROT_READ | PROT_WRITE));
 
-    void *region1;
+    void* region1 = nullptr;
     ASSERT_NO_FATAL_FAILURE(TestMmap(fd, size, PROT_READ | PROT_WRITE, &region1));
 
     memcpy(region1, &data, size);
@@ -131,7 +131,7 @@
 
 TEST(AshmemTest, FileOperationsTest) {
     unique_fd fd;
-    void* region;
+    void* region = nullptr;
 
     // Allocate a 4-page buffer, but leave page-sized holes on either side
     constexpr size_t size = PAGE_SIZE * 4;
@@ -246,7 +246,7 @@
     unique_fd fd[nRegions];
     for (int i = 0; i < nRegions; i++) {
         ASSERT_NO_FATAL_FAILURE(TestCreateRegion(size, fd[i], PROT_READ | PROT_WRITE));
-        void *region;
+        void* region = nullptr;
         ASSERT_NO_FATAL_FAILURE(TestMmap(fd[i], size, PROT_READ | PROT_WRITE, &region));
         memcpy(region, &data, size);
         ASSERT_EQ(0, memcmp(region, &data, size));
diff --git a/libcutils/include/cutils/qtaguid.h b/libcutils/include/cutils/qtaguid.h
index a5ffb03..8902c2b 100644
--- a/libcutils/include/cutils/qtaguid.h
+++ b/libcutils/include/cutils/qtaguid.h
@@ -33,12 +33,6 @@
  */
 extern int qtaguid_untagSocket(int sockfd);
 
-/*
- * Enable/disable qtaguid functionnality at a lower level.
- * When pacified, the kernel will accept commands but do nothing.
- */
-extern int qtaguid_setPacifier(int on);
-
 #ifdef __cplusplus
 }
 #endif
diff --git a/libprocessgroup/OWNERS b/libprocessgroup/OWNERS
index 8ebb8cc..d5aa721 100644
--- a/libprocessgroup/OWNERS
+++ b/libprocessgroup/OWNERS
@@ -1,2 +1,4 @@
-ccross@google.com
+# Bug component: 1293033
 surenb@google.com
+tjmercier@google.com
+carlosgalo@google.com
diff --git a/libprocessgroup/include/processgroup/processgroup.h b/libprocessgroup/include/processgroup/processgroup.h
index 45a723f..9b2d775 100644
--- a/libprocessgroup/include/processgroup/processgroup.h
+++ b/libprocessgroup/include/processgroup/processgroup.h
@@ -28,6 +28,7 @@
 
 static constexpr const char* CGROUPV2_CONTROLLER_NAME = "cgroup2";
 
+bool CgroupsAvailable();
 bool CgroupGetControllerPath(const std::string& cgroup_name, std::string* path);
 bool CgroupGetControllerFromPath(const std::string& path, std::string* cgroup_name);
 bool CgroupGetAttributePath(const std::string& attr_name, std::string* path);
diff --git a/libprocessgroup/processgroup.cpp b/libprocessgroup/processgroup.cpp
index bdda102..1da69ba 100644
--- a/libprocessgroup/processgroup.cpp
+++ b/libprocessgroup/processgroup.cpp
@@ -55,6 +55,11 @@
 
 #define PROCESSGROUP_CGROUP_PROCS_FILE "/cgroup.procs"
 
+bool CgroupsAvailable() {
+    static bool cgroups_available = access("/proc/cgroups", F_OK) == 0;
+    return cgroups_available;
+}
+
 bool CgroupGetControllerPath(const std::string& cgroup_name, std::string* path) {
     auto controller = CgroupMap::GetInstance().FindController(cgroup_name);
 
@@ -362,59 +367,70 @@
 // Returns 0 if there are no processes in the process cgroup left to kill
 // Returns -1 on error
 static int DoKillProcessGroupOnce(const char* cgroup, uid_t uid, int initialPid, int signal) {
-    auto path = ConvertUidPidToPath(cgroup, uid, initialPid) + PROCESSGROUP_CGROUP_PROCS_FILE;
-    std::unique_ptr<FILE, decltype(&fclose)> fd(fopen(path.c_str(), "re"), fclose);
-    if (!fd) {
-        if (errno == ENOENT) {
-            // This happens when process is already dead
-            return 0;
-        }
-        PLOG(WARNING) << __func__ << " failed to open process cgroup uid " << uid << " pid "
-                      << initialPid;
-        return -1;
-    }
-
     // We separate all of the pids in the cgroup into those pids that are also the leaders of
     // process groups (stored in the pgids set) and those that are not (stored in the pids set).
     std::set<pid_t> pgids;
     pgids.emplace(initialPid);
     std::set<pid_t> pids;
 
-    pid_t pid;
+    std::unique_ptr<FILE, decltype(&fclose)> fd(nullptr, fclose);
+
+    if (CgroupsAvailable()) {
+        auto path = ConvertUidPidToPath(cgroup, uid, initialPid) + PROCESSGROUP_CGROUP_PROCS_FILE;
+        fd.reset(fopen(path.c_str(), "re"));
+        if (!fd) {
+            if (errno == ENOENT) {
+                // This happens when process is already dead
+                return 0;
+            }
+            PLOG(WARNING) << __func__ << " failed to open process cgroup uid " << uid << " pid "
+                          << initialPid;
+            return -1;
+        }
+        pid_t pid;
+        bool file_is_empty = true;
+        while (fscanf(fd.get(), "%d\n", &pid) == 1 && pid >= 0) {
+            file_is_empty = false;
+            if (pid == 0) {
+                // Should never happen...  but if it does, trying to kill this
+                // will boomerang right back and kill us!  Let's not let that happen.
+                LOG(WARNING)
+                        << "Yikes, we've been told to kill pid 0!  How about we don't do that?";
+                continue;
+            }
+            pid_t pgid = getpgid(pid);
+            if (pgid == -1) PLOG(ERROR) << "getpgid(" << pid << ") failed";
+            if (pgid == pid) {
+                pgids.emplace(pid);
+            } else {
+                pids.emplace(pid);
+            }
+        }
+        if (file_is_empty) {
+            // This happens when process is already dead
+            return 0;
+        }
+
+        // Erase all pids that will be killed when we kill the process groups.
+        for (auto it = pids.begin(); it != pids.end();) {
+            pid_t pgid = getpgid(*it);
+            if (pgids.count(pgid) == 1) {
+                it = pids.erase(it);
+            } else {
+                ++it;
+            }
+        }
+    }
+
     int processes = 0;
-    while (fscanf(fd.get(), "%d\n", &pid) == 1 && pid >= 0) {
-        processes++;
-        if (pid == 0) {
-            // Should never happen...  but if it does, trying to kill this
-            // will boomerang right back and kill us!  Let's not let that happen.
-            LOG(WARNING) << "Yikes, we've been told to kill pid 0!  How about we don't do that?";
-            continue;
-        }
-        pid_t pgid = getpgid(pid);
-        if (pgid == -1) PLOG(ERROR) << "getpgid(" << pid << ") failed";
-        if (pgid == pid) {
-            pgids.emplace(pid);
-        } else {
-            pids.emplace(pid);
-        }
-    }
-
-    // Erase all pids that will be killed when we kill the process groups.
-    for (auto it = pids.begin(); it != pids.end();) {
-        pid_t pgid = getpgid(*it);
-        if (pgids.count(pgid) == 1) {
-            it = pids.erase(it);
-        } else {
-            ++it;
-        }
-    }
-
     // Kill all process groups.
     for (const auto pgid : pgids) {
         LOG(VERBOSE) << "Killing process group " << -pgid << " in uid " << uid
                      << " as part of process cgroup " << initialPid;
 
-        if (kill(-pgid, signal) == -1 && errno != ESRCH) {
+        if (kill(-pgid, signal) == 0) {
+            processes++;
+        } else if (errno != ESRCH) {
             PLOG(WARNING) << "kill(" << -pgid << ", " << signal << ") failed";
         }
     }
@@ -424,18 +440,22 @@
         LOG(VERBOSE) << "Killing pid " << pid << " in uid " << uid << " as part of process cgroup "
                      << initialPid;
 
-        if (kill(pid, signal) == -1 && errno != ESRCH) {
+        if (kill(pid, signal) == 0) {
+            processes++;
+        } else if (errno != ESRCH) {
             PLOG(WARNING) << "kill(" << pid << ", " << signal << ") failed";
         }
     }
 
-    return feof(fd.get()) ? processes : -1;
+    return (!fd || feof(fd.get())) ? processes : -1;
 }
 
 static int KillProcessGroup(uid_t uid, int initialPid, int signal, int retries,
                             int* max_processes) {
     std::string hierarchy_root_path;
-    CgroupGetControllerPath(CGROUPV2_CONTROLLER_NAME, &hierarchy_root_path);
+    if (CgroupsAvailable()) {
+        CgroupGetControllerPath(CGROUPV2_CONTROLLER_NAME, &hierarchy_root_path);
+    }
     const char* cgroup = hierarchy_root_path.c_str();
 
     std::chrono::steady_clock::time_point start = std::chrono::steady_clock::now();
@@ -451,6 +471,11 @@
             *max_processes = processes;
         }
         LOG(VERBOSE) << "Killed " << processes << " processes for processgroup " << initialPid;
+        if (!CgroupsAvailable()) {
+            // makes no sense to retry, because there are no cgroup_procs file
+            processes = 0;  // no remaining processes
+            break;
+        }
         if (retry > 0) {
             std::this_thread::sleep_for(5ms);
             --retry;
@@ -480,6 +505,11 @@
                       << " in " << static_cast<int>(ms) << "ms";
         }
 
+        if (!CgroupsAvailable()) {
+            // nothing to do here, if cgroups isn't available
+            return 0;
+        }
+
         // 400 retries correspond to 2 secs max timeout
         int err = RemoveProcessGroup(cgroup, uid, initialPid, 400);
 
diff --git a/libprocessgroup/profiles/task_profiles.json b/libprocessgroup/profiles/task_profiles.json
index 15f95fc..e44d3bf 100644
--- a/libprocessgroup/profiles/task_profiles.json
+++ b/libprocessgroup/profiles/task_profiles.json
@@ -80,17 +80,20 @@
     {
       "Name": "BfqWeight",
       "Controller": "io",
-      "File": "io.bfq.weight"
+      "File": "blkio.bfq.weight",
+      "FileV2": "io.bfq.weight"
     },
     {
       "Name": "CfqGroupIdle",
       "Controller": "io",
-      "File": "io.group_idle"
+      "File": "blkio.group_idle",
+      "FileV2": "io.group_idle"
     },
     {
       "Name": "CfqWeight",
       "Controller": "io",
-      "File": "io.weight"
+      "File": "blkio.weight",
+      "FileV2": "io.weight"
     }
   ],
 
@@ -459,7 +462,7 @@
           {
             "Controller": "blkio",
             "Path": "background"
-	  }
+          }
         },
         {
           "Name": "SetAttribute",
@@ -499,7 +502,7 @@
           {
             "Controller": "blkio",
             "Path": ""
-	  }
+          }
         },
         {
           "Name": "SetAttribute",
@@ -539,7 +542,7 @@
           {
             "Controller": "blkio",
             "Path": ""
-	  }
+          }
         },
         {
           "Name": "SetAttribute",
@@ -579,7 +582,7 @@
           {
             "Controller": "blkio",
             "Path": ""
-	  }
+          }
         },
         {
           "Name": "SetAttribute",
@@ -806,6 +809,10 @@
       "Profiles": [ "Dex2oatPerformance", "LowIoPriority", "TimerSlackHigh" ]
     },
     {
+      "Name": "Dex2OatBackground",
+      "Profiles": [ "Dex2OatBootComplete" ]
+    },
+    {
       "Name": "OtaProfiles",
       "Profiles": [ "ServiceCapacityLow", "LowIoPriority", "HighEnergySaving" ]
     }
diff --git a/libprocessgroup/task_profiles.cpp b/libprocessgroup/task_profiles.cpp
index 744710f..35adf36 100644
--- a/libprocessgroup/task_profiles.cpp
+++ b/libprocessgroup/task_profiles.cpp
@@ -287,7 +287,7 @@
     if (cache_type == ResourceCacheType::RCT_TASK &&
         fd_[cache_type] == FdCacheHelper::FDS_APP_DEPENDENT) {
         // application-dependent path can't be used with tid
-        PLOG(ERROR) << "Application profile can't be applied to a thread";
+        LOG(ERROR) << Name() << ": application profile can't be applied to a thread";
         return ProfileAction::FAIL;
     }
 
@@ -304,7 +304,7 @@
     std::string procs_path = controller()->GetProcsFilePath(path_, uid, pid);
     unique_fd tmp_fd(TEMP_FAILURE_RETRY(open(procs_path.c_str(), O_WRONLY | O_CLOEXEC)));
     if (tmp_fd < 0) {
-        PLOG(WARNING) << "Failed to open " << procs_path;
+        PLOG(WARNING) << Name() << "::" << __func__ << ": failed to open " << procs_path;
         return false;
     }
     if (!AddTidToCgroup(pid, tmp_fd, controller()->name())) {
@@ -325,7 +325,7 @@
     std::string tasks_path = controller()->GetTasksFilePath(path_);
     unique_fd tmp_fd(TEMP_FAILURE_RETRY(open(tasks_path.c_str(), O_WRONLY | O_CLOEXEC)));
     if (tmp_fd < 0) {
-        PLOG(WARNING) << "Failed to open " << tasks_path;
+        PLOG(WARNING) << Name() << "::" << __func__ << ": failed to open " << tasks_path;
         return false;
     }
     if (!AddTidToCgroup(tid, tmp_fd, controller()->name())) {
@@ -394,7 +394,7 @@
     unique_fd tmp_fd(TEMP_FAILURE_RETRY(open(path.c_str(), O_WRONLY | O_CLOEXEC)));
 
     if (tmp_fd < 0) {
-        if (logfailures) PLOG(WARNING) << "Failed to open " << path;
+        if (logfailures) PLOG(WARNING) << Name() << "::" << __func__ << ": failed to open " << path;
         return false;
     }
 
@@ -431,7 +431,7 @@
     if (cache_type == ResourceCacheType::RCT_TASK &&
         fd_[cache_type] == FdCacheHelper::FDS_APP_DEPENDENT) {
         // application-dependent path can't be used with tid
-        PLOG(ERROR) << "Application profile can't be applied to a thread";
+        LOG(ERROR) << Name() << ": application profile can't be applied to a thread";
         return ProfileAction::FAIL;
     }
     return ProfileAction::UNUSED;
diff --git a/libsparse/append2simg.cpp b/libsparse/append2simg.cpp
index 99f4339..d3a43a8 100644
--- a/libsparse/append2simg.cpp
+++ b/libsparse/append2simg.cpp
@@ -64,60 +64,60 @@
     input_path = argv[2];
   } else {
     usage();
-    exit(-1);
+    exit(EXIT_FAILURE);
   }
 
   ret = asprintf(&tmp_path, "%s.append2simg", output_path);
   if (ret < 0) {
     fprintf(stderr, "Couldn't allocate filename\n");
-    exit(-1);
+    exit(EXIT_FAILURE);
   }
 
   output = open(output_path, O_RDWR | O_BINARY);
   if (output < 0) {
     fprintf(stderr, "Couldn't open output file (%s)\n", strerror(errno));
-    exit(-1);
+    exit(EXIT_FAILURE);
   }
 
   sparse_output = sparse_file_import_auto(output, false, true);
   if (!sparse_output) {
     fprintf(stderr, "Couldn't import output file\n");
-    exit(-1);
+    exit(EXIT_FAILURE);
   }
 
   input = open(input_path, O_RDONLY | O_BINARY);
   if (input < 0) {
     fprintf(stderr, "Couldn't open input file (%s)\n", strerror(errno));
-    exit(-1);
+    exit(EXIT_FAILURE);
   }
 
   input_len = lseek64(input, 0, SEEK_END);
   if (input_len < 0) {
     fprintf(stderr, "Couldn't get input file length (%s)\n", strerror(errno));
-    exit(-1);
+    exit(EXIT_FAILURE);
   } else if (input_len % sparse_output->block_size) {
     fprintf(stderr, "Input file is not a multiple of the output file's block size");
-    exit(-1);
+    exit(EXIT_FAILURE);
   }
   lseek64(input, 0, SEEK_SET);
 
   output_block = sparse_output->len / sparse_output->block_size;
   if (sparse_file_add_fd(sparse_output, input, 0, input_len, output_block) < 0) {
     fprintf(stderr, "Couldn't add input file\n");
-    exit(-1);
+    exit(EXIT_FAILURE);
   }
   sparse_output->len += input_len;
 
   tmp_fd = open(tmp_path, O_WRONLY | O_CREAT | O_BINARY, 0664);
   if (tmp_fd < 0) {
     fprintf(stderr, "Couldn't open temporary file (%s)\n", strerror(errno));
-    exit(-1);
+    exit(EXIT_FAILURE);
   }
 
   lseek64(output, 0, SEEK_SET);
   if (sparse_file_write(sparse_output, tmp_fd, false, true, false) < 0) {
     fprintf(stderr, "Failed to write sparse file\n");
-    exit(-1);
+    exit(EXIT_FAILURE);
   }
 
   sparse_file_destroy(sparse_output);
@@ -128,10 +128,10 @@
   ret = rename(tmp_path, output_path);
   if (ret < 0) {
     fprintf(stderr, "Failed to rename temporary file (%s)\n", strerror(errno));
-    exit(-1);
+    exit(EXIT_FAILURE);
   }
 
   free(tmp_path);
 
-  exit(0);
+  exit(EXIT_SUCCESS);
 }
diff --git a/libsparse/img2simg.cpp b/libsparse/img2simg.cpp
index 51580f7..c390506 100644
--- a/libsparse/img2simg.cpp
+++ b/libsparse/img2simg.cpp
@@ -61,14 +61,14 @@
         break;
       default:
         usage();
-        exit(-1);
+        exit(EXIT_FAILURE);
     }
   }
 
   extra = argc - optind;
   if (extra < 2 || extra > 3) {
     usage();
-    exit(-1);
+    exit(EXIT_FAILURE);
   }
 
   if (extra == 3) {
@@ -77,7 +77,7 @@
 
   if (block_size < 1024 || block_size % 4 != 0) {
     usage();
-    exit(-1);
+    exit(EXIT_FAILURE);
   }
 
   arg_in = argv[optind];
@@ -87,7 +87,7 @@
     in = open(arg_in, O_RDONLY | O_BINARY);
     if (in < 0) {
       fprintf(stderr, "Cannot open input file %s\n", arg_in);
-      exit(-1);
+      exit(EXIT_FAILURE);
     }
   }
 
@@ -98,7 +98,7 @@
     out = open(arg_out, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, 0664);
     if (out < 0) {
       fprintf(stderr, "Cannot open output file %s\n", arg_out);
-      exit(-1);
+      exit(EXIT_FAILURE);
     }
   }
 
@@ -108,24 +108,24 @@
   s = sparse_file_new(block_size, len);
   if (!s) {
     fprintf(stderr, "Failed to create sparse file\n");
-    exit(-1);
+    exit(EXIT_FAILURE);
   }
 
   sparse_file_verbose(s);
   ret = sparse_file_read(s, in, mode, false);
   if (ret) {
     fprintf(stderr, "Failed to read file\n");
-    exit(-1);
+    exit(EXIT_FAILURE);
   }
 
   ret = sparse_file_write(s, out, false, true, false);
   if (ret) {
     fprintf(stderr, "Failed to write sparse file\n");
-    exit(-1);
+    exit(EXIT_FAILURE);
   }
 
   close(in);
   close(out);
 
-  exit(0);
+  exit(EXIT_SUCCESS);
 }
diff --git a/libsparse/simg2img.cpp b/libsparse/simg2img.cpp
index 8ba5f69..2301a83 100644
--- a/libsparse/simg2img.cpp
+++ b/libsparse/simg2img.cpp
@@ -41,13 +41,13 @@
 
   if (argc < 3) {
     usage();
-    exit(-1);
+    exit(EXIT_FAILURE);
   }
 
   out = open(argv[argc - 1], O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, 0664);
   if (out < 0) {
     fprintf(stderr, "Cannot open output file %s\n", argv[argc - 1]);
-    exit(-1);
+    exit(EXIT_FAILURE);
   }
 
   for (i = 1; i < argc - 1; i++) {
@@ -57,14 +57,14 @@
       in = open(argv[i], O_RDONLY | O_BINARY);
       if (in < 0) {
         fprintf(stderr, "Cannot open input file %s\n", argv[i]);
-        exit(-1);
+        exit(EXIT_FAILURE);
       }
     }
 
     s = sparse_file_import(in, true, false);
     if (!s) {
       fprintf(stderr, "Failed to read sparse file\n");
-      exit(-1);
+      exit(EXIT_FAILURE);
     }
 
     if (lseek(out, 0, SEEK_SET) == -1) {
@@ -74,7 +74,7 @@
 
     if (sparse_file_write(s, out, false, false, false) < 0) {
       fprintf(stderr, "Cannot write output file\n");
-      exit(-1);
+      exit(EXIT_FAILURE);
     }
     sparse_file_destroy(s);
     close(in);
@@ -82,5 +82,5 @@
 
   close(out);
 
-  exit(0);
+  exit(EXIT_SUCCESS);
 }
diff --git a/libsparse/simg2simg.cpp b/libsparse/simg2simg.cpp
deleted file mode 100644
index a2c296e..0000000
--- a/libsparse/simg2simg.cpp
+++ /dev/null
@@ -1,111 +0,0 @@
-/*
- * Copyright (C) 2012 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#define _FILE_OFFSET_BITS 64
-#define _LARGEFILE64_SOURCE 1
-
-#include <fcntl.h>
-#include <stdbool.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <unistd.h>
-
-#include <sparse/sparse.h>
-
-#ifndef O_BINARY
-#define O_BINARY 0
-#endif
-
-void usage() {
-  fprintf(stderr, "Usage: simg2simg <sparse image file> <sparse_image_file> <max_size>\n");
-}
-
-int main(int argc, char* argv[]) {
-  int in;
-  int out;
-  int i;
-  int ret;
-  struct sparse_file* s;
-  int64_t max_size;
-  struct sparse_file** out_s;
-  int files;
-  char filename[4096];
-
-  if (argc != 4) {
-    usage();
-    exit(-1);
-  }
-
-  max_size = atoll(argv[3]);
-
-  in = open(argv[1], O_RDONLY | O_BINARY);
-  if (in < 0) {
-    fprintf(stderr, "Cannot open input file %s\n", argv[1]);
-    exit(-1);
-  }
-
-  s = sparse_file_import(in, true, false);
-  if (!s) {
-    fprintf(stderr, "Failed to import sparse file\n");
-    exit(-1);
-  }
-
-  files = sparse_file_resparse(s, max_size, nullptr, 0);
-  if (files < 0) {
-    fprintf(stderr, "Failed to resparse\n");
-    exit(-1);
-  }
-
-  out_s = calloc(sizeof(struct sparse_file*), files);
-  if (!out_s) {
-    fprintf(stderr, "Failed to allocate sparse file array\n");
-    exit(-1);
-  }
-
-  files = sparse_file_resparse(s, max_size, out_s, files);
-  if (files < 0) {
-    fprintf(stderr, "Failed to resparse\n");
-    exit(-1);
-  }
-
-  for (i = 0; i < files; i++) {
-    ret = snprintf(filename, sizeof(filename), "%s.%d", argv[2], i);
-    if (ret >= (int)sizeof(filename)) {
-      fprintf(stderr, "Filename too long\n");
-      exit(-1);
-    }
-
-    out = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, 0664);
-    if (out < 0) {
-      fprintf(stderr, "Cannot open output file %s\n", argv[2]);
-      exit(-1);
-    }
-
-    ret = sparse_file_write(out_s[i], out, false, true, false);
-    if (ret) {
-      fprintf(stderr, "Failed to write sparse file\n");
-      exit(-1);
-    }
-    close(out);
-  }
-
-  close(in);
-
-  exit(0);
-}
diff --git a/libsystem/include/system/graphics-base-v1.2.h b/libsystem/include/system/graphics-base-v1.2.h
index 2194f5e..624912c 100644
--- a/libsystem/include/system/graphics-base-v1.2.h
+++ b/libsystem/include/system/graphics-base-v1.2.h
@@ -14,13 +14,17 @@
 } android_hdr_v1_2_t;
 
 typedef enum {
-    HAL_DATASPACE_DISPLAY_BT2020 = 142999552 /* ((STANDARD_BT2020 | TRANSFER_SRGB) | RANGE_FULL) */,
+    HAL_DATASPACE_DISPLAY_BT2020 = 142999552 /* STANDARD_BT2020 | TRANSFER_SRGB | RANGE_FULL */,
     HAL_DATASPACE_DYNAMIC_DEPTH = 4098 /* 0x1002 */,
     HAL_DATASPACE_JPEG_APP_SEGMENTS = 4099 /* 0x1003 */,
     HAL_DATASPACE_HEIF = 4100 /* 0x1004 */,
 } android_dataspace_v1_2_t;
 
 typedef enum {
+    HAL_COLOR_MODE_DISPLAY_BT2020 = 13,
+} android_color_mode_v1_2_t;
+
+typedef enum {
     HAL_PIXEL_FORMAT_HSV_888 = 55 /* 0x37 */,
 } android_pixel_format_v1_2_t;
 
diff --git a/libutils/Android.bp b/libutils/Android.bp
index 26e1597..162f0f4 100644
--- a/libutils/Android.bp
+++ b/libutils/Android.bp
@@ -21,11 +21,13 @@
     vendor_ramdisk_available: true,
     host_supported: true,
     native_bridge_supported: true,
+    defaults: [
+        "apex-lowest-min-sdk-version",
+    ],
     apex_available: [
         "//apex_available:platform",
         "//apex_available:anyapex",
     ],
-    min_sdk_version: "apex_inherit",
 
     header_libs: [
         "libbase_headers",
@@ -124,7 +126,10 @@
 
 cc_defaults {
     name: "libutils_impl_defaults",
-    defaults: ["libutils_defaults"],
+    defaults: [
+        "libutils_defaults",
+        "apex-lowest-min-sdk-version",
+    ],
     native_bridge_supported: true,
 
     srcs: [
@@ -167,13 +172,8 @@
         "//apex_available:anyapex",
         "//apex_available:platform",
     ],
-    min_sdk_version: "apex_inherit",
 
     afdo: true,
-
-    header_abi_checker: {
-        diff_flags: ["-allow-adding-removing-weak-symbols"],
-    },
 }
 
 cc_library {
@@ -184,6 +184,12 @@
         enabled: true,
         support_system_process: true,
     },
+
+    header_abi_checker: {
+        // AFDO affects weak symbols.
+        diff_flags: ["-allow-adding-removing-weak-symbols"],
+        ref_dump_dirs: ["abi-dumps"],
+    },
 }
 
 cc_library {
diff --git a/libutils/String8.cpp b/libutils/String8.cpp
index 3690389..82f5cb6 100644
--- a/libutils/String8.cpp
+++ b/libutils/String8.cpp
@@ -25,6 +25,7 @@
 
 #include <ctype.h>
 
+#include <limits>
 #include <string>
 
 #include "SharedBuffer.h"
diff --git a/libutils/Unicode_test.cpp b/libutils/Unicode_test.cpp
index 8b994d9..7969525 100644
--- a/libutils/Unicode_test.cpp
+++ b/libutils/Unicode_test.cpp
@@ -35,86 +35,208 @@
     }
 
     char16_t const * const kSearchString = u"I am a leaf on the wind.";
+
+    constexpr static size_t BUFSIZE = 64;       // large enough for all tests
+
+    void TestUTF8toUTF16(std::initializer_list<uint8_t> input,
+                         std::initializer_list<char16_t> expect,
+                         const char* err_msg_length = "",
+                         ssize_t expected_length = 0) {
+        uint8_t empty_str[] = {};
+        char16_t output[BUFSIZE];
+
+        const size_t inlen = input.size(), outlen = expect.size();
+        ASSERT_LT(outlen, BUFSIZE);
+
+        const uint8_t *input_data = inlen ? std::data(input) : empty_str;
+        ssize_t measured = utf8_to_utf16_length(input_data, inlen);
+        EXPECT_EQ(expected_length ? : (ssize_t)outlen, measured) << err_msg_length;
+
+        utf8_to_utf16(input_data, inlen, output, outlen + 1);
+        for (size_t i = 0; i < outlen; i++) {
+            EXPECT_EQ(std::data(expect)[i], output[i]);
+        }
+        EXPECT_EQ(0, output[outlen]) << "should be null terminated";
+    }
+
+    void TestUTF16toUTF8(std::initializer_list<char16_t> input,
+                         std::initializer_list<char> expect,
+                         const char* err_msg_length = "",
+                         ssize_t expected_length = 0) {
+        char16_t empty_str[] = {};
+        char output[BUFSIZE];
+
+        const size_t inlen = input.size(), outlen = expect.size();
+        ASSERT_LT(outlen, BUFSIZE);
+
+        const char16_t *input_data = inlen ? std::data(input) : empty_str;
+        ssize_t measured = utf16_to_utf8_length(input_data, inlen);
+        EXPECT_EQ(expected_length ? : (ssize_t)outlen, measured) << err_msg_length;
+
+        utf16_to_utf8(input_data, inlen, output, outlen + 1);
+        for (size_t i = 0; i < outlen; i++) {
+            EXPECT_EQ(std::data(expect)[i], output[i]);
+        }
+        EXPECT_EQ(0, output[outlen]) << "should be null terminated";
+    }
 };
 
 TEST_F(UnicodeTest, UTF8toUTF16ZeroLength) {
-    ssize_t measured;
-
-    const uint8_t str[] = { };
-
-    measured = utf8_to_utf16_length(str, 0);
-    EXPECT_EQ(0, measured)
-            << "Zero length input should return zero length output.";
+    TestUTF8toUTF16({}, {},
+        "Zero length input should return zero length output.");
 }
 
-TEST_F(UnicodeTest, UTF8toUTF16ASCIILength) {
-    ssize_t measured;
-
-    // U+0030 or ASCII '0'
-    const uint8_t str[] = { 0x30 };
-
-    measured = utf8_to_utf16_length(str, sizeof(str));
-    EXPECT_EQ(1, measured)
-            << "ASCII glyphs should have a length of 1 char16_t";
+TEST_F(UnicodeTest, UTF8toUTF16ASCII) {
+    TestUTF8toUTF16(
+        { 0x30 },               // U+0030 or ASCII '0'
+        { 0x0030 },
+        "ASCII codepoints should have a length of 1 char16_t");
 }
 
-TEST_F(UnicodeTest, UTF8toUTF16Plane1Length) {
-    ssize_t measured;
-
-    // U+2323 SMILE
-    const uint8_t str[] = { 0xE2, 0x8C, 0xA3 };
-
-    measured = utf8_to_utf16_length(str, sizeof(str));
-    EXPECT_EQ(1, measured)
-            << "Plane 1 glyphs should have a length of 1 char16_t";
+TEST_F(UnicodeTest, UTF8toUTF16Plane1) {
+    TestUTF8toUTF16(
+        { 0xE2, 0x8C, 0xA3 },   // U+2323 SMILE
+        { 0x2323 },
+        "Plane 1 codepoints should have a length of 1 char16_t");
 }
 
-TEST_F(UnicodeTest, UTF8toUTF16SurrogateLength) {
-    ssize_t measured;
-
-    // U+10000
-    const uint8_t str[] = { 0xF0, 0x90, 0x80, 0x80 };
-
-    measured = utf8_to_utf16_length(str, sizeof(str));
-    EXPECT_EQ(2, measured)
-            << "Surrogate pairs should have a length of 2 char16_t";
+TEST_F(UnicodeTest, UTF8toUTF16Surrogate) {
+    TestUTF8toUTF16(
+        { 0xF0, 0x90, 0x80, 0x80 },   // U+10000
+        { 0xD800, 0xDC00 },
+        "Surrogate pairs should have a length of 2 char16_t");
 }
 
 TEST_F(UnicodeTest, UTF8toUTF16TruncatedUTF8) {
-    ssize_t measured;
-
-    // Truncated U+2323 SMILE
-    // U+2323 SMILE
-    const uint8_t str[] = { 0xE2, 0x8C };
-
-    measured = utf8_to_utf16_length(str, sizeof(str));
-    EXPECT_EQ(-1, measured)
-            << "Truncated UTF-8 should return -1 to indicate invalid";
+    TestUTF8toUTF16(
+        { 0xE2, 0x8C },       // Truncated U+2323 SMILE
+        { },                  // Conversion should still work but produce nothing
+        "Truncated UTF-8 should return -1 to indicate invalid",
+        -1);
 }
 
 TEST_F(UnicodeTest, UTF8toUTF16Normal) {
-    const uint8_t str[] = {
-        0x30, // U+0030, 1 UTF-16 character
-        0xC4, 0x80, // U+0100, 1 UTF-16 character
-        0xE2, 0x8C, 0xA3, // U+2323, 1 UTF-16 character
+    TestUTF8toUTF16({
+        0x30,                   // U+0030, 1 UTF-16 character
+        0xC4, 0x80,             // U+0100, 1 UTF-16 character
+        0xE2, 0x8C, 0xA3,       // U+2323, 1 UTF-16 character
         0xF0, 0x90, 0x80, 0x80, // U+10000, 2 UTF-16 character
-    };
+    }, {
+        0x0030,
+        0x0100,
+        0x2323,
+        0xD800, 0xDC00
+    });
+}
 
-    char16_t output[1 + 1 + 1 + 2 + 1];  // Room for null
+TEST_F(UnicodeTest, UTF8toUTF16Invalid) {
+    // TODO: The current behavior of utf8_to_utf16 is to treat invalid
+    // leading byte (>= 0xf8) as a 4-byte UTF8 sequence, and to treat
+    // invalid trailing byte(s) (i.e. bytes not having MSB set) as if
+    // they are valid and do the normal conversion. However, a better
+    // handling would be to treat invalid sequences as errors, such
+    // cases need to be reported and invalid characters (e.g. U+FFFD)
+    // could be produced at the place of error.  Until a fix is ready
+    // and compatibility is not an issue, we will keep testing the
+    // current behavior
+    TestUTF8toUTF16({
+        0xf8,                   // invalid leading byte
+        0xc4, 0x00,             // U+0100 with invalid trailing byte
+        0xe2, 0x0c, 0xa3,       // U+2323 with invalid trailing bytes
+        0xf0, 0x10, 0x00, 0x00, // U+10000 with invalid trailing bytes
+    }, {
+        0x4022,                 // invalid leading byte (>=0xfc) is treated
+                                // as valid for 4-byte UTF8 sequence
+	0x000C,
+	0x00A3,                 // invalid leadnig byte (b'10xxxxxx) is
+                                // treated as valid single UTF-8 byte
+        0xD800,                 // invalid trailing bytes are treated
+        0xDC00,                 // as valid bytes and follow normal
+    });
+}
 
-    utf8_to_utf16(str, sizeof(str), output, sizeof(output) / sizeof(output[0]));
+TEST_F(UnicodeTest, UTF16toUTF8ZeroLength) {
+    // TODO: The current behavior of utf16_to_utf8_length() is that
+    // it returns -1 if the input is a zero length UTF16 string.
+    // This is inconsistent with utf8_to_utf16_length() where a zero
+    // length string returns 0.  However, to fix the current behavior,
+    // we could have compatibility issue.  Until then, we will keep
+    // testing the current behavior
+    TestUTF16toUTF8({}, {},
+        "Zero length UTF16 input should return length of -1.", -1);
+}
 
-    EXPECT_EQ(0x0030, output[0])
-            << "should be U+0030";
-    EXPECT_EQ(0x0100, output[1])
-            << "should be U+0100";
-    EXPECT_EQ(0x2323, output[2])
-            << "should be U+2323";
-    EXPECT_EQ(0xD800, output[3])
-            << "should be first half of surrogate U+10000";
-    EXPECT_EQ(0xDC00, output[4])
-            << "should be second half of surrogate U+10000";
-    EXPECT_EQ(0, output[5]) << "should be null terminated";
+TEST_F(UnicodeTest, UTF16toUTF8ASCII) {
+    TestUTF16toUTF8(
+        { 0x0030 },  // U+0030 or ASCII '0'
+        { '\x30' },
+        "ASCII codepoints in UTF16 should give a length of 1 in UTF8");
+}
+
+TEST_F(UnicodeTest, UTF16toUTF8Plane1) {
+    TestUTF16toUTF8(
+        { 0x2323 },  // U+2323 SMILE
+        { '\xE2', '\x8C', '\xA3' },
+        "Plane 1 codepoints should have a length of 3 char in UTF-8");
+}
+
+TEST_F(UnicodeTest, UTF16toUTF8Surrogate) {
+    TestUTF16toUTF8(
+        { 0xD800, 0xDC00 },  // U+10000
+        { '\xF0', '\x90', '\x80', '\x80' },
+        "Surrogate pairs should have a length of 4 chars");
+}
+
+TEST_F(UnicodeTest, UTF16toUTF8UnpairedSurrogate) {
+    TestUTF16toUTF8(
+        { 0xD800 },     // U+10000 with high surrogate pair only
+        { },            // Unpaired surrogate should be ignored
+        "A single unpaired high surrogate should have a length of 0 chars");
+
+    TestUTF16toUTF8(
+        { 0xDC00 },     // U+10000 with low surrogate pair only
+        { },            // Unpaired surrogate should be ignored
+        "A single unpaired low surrogate should have a length of 0 chars");
+
+    TestUTF16toUTF8(
+        // U+0030, U+0100, U+10000 with high surrogate pair only, U+2323
+        { 0x0030, 0x0100, 0xDC00, 0x2323 },
+        { '\x30', '\xC4', '\x80', '\xE2', '\x8C', '\xA3' },
+        "Unpaired high surrogate should be skipped in the middle");
+
+    TestUTF16toUTF8(
+        // U+0030, U+0100, U+10000 with high surrogate pair only, U+2323
+        { 0x0030, 0x0100, 0xDC00, 0x2323 },
+        { '\x30', '\xC4', '\x80', '\xE2', '\x8C', '\xA3' },
+        "Unpaired low surrogate should be skipped in the middle");
+}
+
+TEST_F(UnicodeTest, UTF16toUTF8CorrectInvalidSurrogate) {
+    // http://b/29250543
+    // d841d8 is an invalid start for a surrogate pair. Make sure this is handled by ignoring the
+    // first character in the pair and handling the rest correctly.
+    TestUTF16toUTF8(
+        { 0xD841, 0xD841, 0xDC41 },     // U+20441
+        { '\xF0', '\xA0', '\x91', '\x81' },
+        "Invalid start for a surrogate pair should be ignored");
+}
+
+TEST_F(UnicodeTest, UTF16toUTF8Normal) {
+    TestUTF16toUTF8({
+        0x0024, // U+0024 ($) --> 0x24,           1 UTF-8 byte
+        0x00A3, // U+00A3 (£) --> 0xC2 0xA3,      2 UTF-8 bytes
+        0x0939, // U+0939 (ह) --> 0xE0 0xA4 0xB9, 3 UTF-8 bytes
+        0x20AC, // U+20AC (€) --> 0xE2 0x82 0xAC, 3 UTF-8 bytes
+        0xD55C, // U+D55C (한)--> 0xED 0x95 0x9C, 3 UTF-8 bytes
+        0xD801, 0xDC37, // U+10437 (𐐷) --> 0xF0 0x90 0x90 0xB7, 4 UTF-8 bytes
+    }, {
+        '\x24',
+        '\xC2', '\xA3',
+        '\xE0', '\xA4', '\xB9',
+        '\xE2', '\x82', '\xAC',
+        '\xED', '\x95', '\x9C',
+        '\xF0', '\x90', '\x90', '\xB7',
+    });
 }
 
 TEST_F(UnicodeTest, strstr16EmptyTarget) {
diff --git a/libutils/abi-dumps/arm64/source-based/libutils.so.lsdump b/libutils/abi-dumps/arm64/source-based/libutils.so.lsdump
new file mode 100644
index 0000000..c89af9e
--- /dev/null
+++ b/libutils/abi-dumps/arm64/source-based/libutils.so.lsdump
@@ -0,0 +1,15553 @@
+{
+ "array_types" :
+ [
+  {
+   "alignment" : 4,
+   "linker_set_key" : "_ZTIA0_i",
+   "name" : "int[0]",
+   "referenced_type" : "_ZTIi",
+   "self_type" : "_ZTIA0_i",
+   "source_file" : "system/core/libcutils/include_outside_system/cutils/native_handle.h"
+  },
+  {
+   "alignment" : 2,
+   "linker_set_key" : "_ZTIA1_Ds",
+   "name" : "char16_t[1]",
+   "referenced_type" : "_ZTIDs",
+   "self_type" : "_ZTIA1_Ds",
+   "size" : 2,
+   "source_file" : "system/core/libutils/include/utils/String16.h"
+  },
+  {
+   "alignment" : 1,
+   "linker_set_key" : "_ZTIA20_c",
+   "name" : "char[20]",
+   "referenced_type" : "_ZTIc",
+   "self_type" : "_ZTIA20_c",
+   "size" : 20,
+   "source_file" : "system/core/libutils/include/utils/Printer.h"
+  },
+  {
+   "alignment" : 1,
+   "linker_set_key" : "_ZTIA5121_h",
+   "name" : "unsigned char[5121]",
+   "referenced_type" : "_ZTIh",
+   "self_type" : "_ZTIA5121_h",
+   "size" : 5121,
+   "source_file" : "system/logging/liblog/include_vndk/log/log_read.h"
+  },
+  {
+   "alignment" : 4,
+   "linker_set_key" : "_ZTIA8_j",
+   "name" : "unsigned int[8]",
+   "referenced_type" : "_ZTIj",
+   "self_type" : "_ZTIA8_j",
+   "size" : 32,
+   "source_file" : "system/core/libsystem/include/system/graphics.h"
+  },
+  {
+   "linker_set_key" : "_ZTIA_f",
+   "name" : "float[]",
+   "referenced_type" : "_ZTIf",
+   "self_type" : "_ZTIA_f",
+   "source_file" : "system/core/libsystem/include/system/graphics.h"
+  }
+ ],
+ "builtin_types" :
+ [
+  {
+   "alignment" : 4,
+   "is_integral" : true,
+   "is_unsigned" : true,
+   "linker_set_key" : "_ZTIDi",
+   "name" : "char32_t",
+   "referenced_type" : "_ZTIDi",
+   "self_type" : "_ZTIDi",
+   "size" : 4
+  },
+  {
+   "alignment" : 8,
+   "linker_set_key" : "_ZTIDn",
+   "name" : "std::nullptr_t",
+   "referenced_type" : "_ZTIDn",
+   "self_type" : "_ZTIDn",
+   "size" : 8
+  },
+  {
+   "alignment" : 2,
+   "is_integral" : true,
+   "is_unsigned" : true,
+   "linker_set_key" : "_ZTIDs",
+   "name" : "char16_t",
+   "referenced_type" : "_ZTIDs",
+   "self_type" : "_ZTIDs",
+   "size" : 2
+  },
+  {
+   "alignment" : 1,
+   "is_integral" : true,
+   "linker_set_key" : "_ZTIa",
+   "name" : "signed char",
+   "referenced_type" : "_ZTIa",
+   "self_type" : "_ZTIa",
+   "size" : 1
+  },
+  {
+   "alignment" : 1,
+   "is_integral" : true,
+   "is_unsigned" : true,
+   "linker_set_key" : "_ZTIb",
+   "name" : "bool",
+   "referenced_type" : "_ZTIb",
+   "self_type" : "_ZTIb",
+   "size" : 1
+  },
+  {
+   "alignment" : 1,
+   "is_integral" : true,
+   "is_unsigned" : true,
+   "linker_set_key" : "_ZTIc",
+   "name" : "char",
+   "referenced_type" : "_ZTIc",
+   "self_type" : "_ZTIc",
+   "size" : 1
+  },
+  {
+   "alignment" : 8,
+   "linker_set_key" : "_ZTId",
+   "name" : "double",
+   "referenced_type" : "_ZTId",
+   "self_type" : "_ZTId",
+   "size" : 8
+  },
+  {
+   "alignment" : 4,
+   "linker_set_key" : "_ZTIf",
+   "name" : "float",
+   "referenced_type" : "_ZTIf",
+   "self_type" : "_ZTIf",
+   "size" : 4
+  },
+  {
+   "alignment" : 1,
+   "is_integral" : true,
+   "is_unsigned" : true,
+   "linker_set_key" : "_ZTIh",
+   "name" : "unsigned char",
+   "referenced_type" : "_ZTIh",
+   "self_type" : "_ZTIh",
+   "size" : 1
+  },
+  {
+   "alignment" : 4,
+   "is_integral" : true,
+   "linker_set_key" : "_ZTIi",
+   "name" : "int",
+   "referenced_type" : "_ZTIi",
+   "self_type" : "_ZTIi",
+   "size" : 4
+  },
+  {
+   "alignment" : 4,
+   "is_integral" : true,
+   "is_unsigned" : true,
+   "linker_set_key" : "_ZTIj",
+   "name" : "unsigned int",
+   "referenced_type" : "_ZTIj",
+   "self_type" : "_ZTIj",
+   "size" : 4
+  },
+  {
+   "alignment" : 8,
+   "is_integral" : true,
+   "linker_set_key" : "_ZTIl",
+   "name" : "long",
+   "referenced_type" : "_ZTIl",
+   "self_type" : "_ZTIl",
+   "size" : 8
+  },
+  {
+   "alignment" : 8,
+   "is_integral" : true,
+   "is_unsigned" : true,
+   "linker_set_key" : "_ZTIm",
+   "name" : "unsigned long",
+   "referenced_type" : "_ZTIm",
+   "self_type" : "_ZTIm",
+   "size" : 8
+  },
+  {
+   "alignment" : 2,
+   "is_integral" : true,
+   "linker_set_key" : "_ZTIs",
+   "name" : "short",
+   "referenced_type" : "_ZTIs",
+   "self_type" : "_ZTIs",
+   "size" : 2
+  },
+  {
+   "alignment" : 2,
+   "is_integral" : true,
+   "is_unsigned" : true,
+   "linker_set_key" : "_ZTIt",
+   "name" : "unsigned short",
+   "referenced_type" : "_ZTIt",
+   "self_type" : "_ZTIt",
+   "size" : 2
+  },
+  {
+   "linker_set_key" : "_ZTIv",
+   "name" : "void",
+   "referenced_type" : "_ZTIv",
+   "self_type" : "_ZTIv"
+  },
+  {
+   "alignment" : 8,
+   "is_integral" : true,
+   "linker_set_key" : "_ZTIx",
+   "name" : "long long",
+   "referenced_type" : "_ZTIx",
+   "self_type" : "_ZTIx",
+   "size" : 8
+  },
+  {
+   "alignment" : 8,
+   "is_integral" : true,
+   "is_unsigned" : true,
+   "linker_set_key" : "_ZTIy",
+   "name" : "unsigned long long",
+   "referenced_type" : "_ZTIy",
+   "self_type" : "_ZTIy",
+   "size" : 8
+  }
+ ],
+ "elf_functions" :
+ [
+  {
+   "name" : "_Z24androidCreateThreadGetIDPFiPvES_PS_"
+  },
+  {
+   "name" : "_ZN7android10LogPrinter8printRawEPKc"
+  },
+  {
+   "name" : "_ZN7android10LogPrinter9printLineEPKc"
+  },
+  {
+   "name" : "_ZN7android10LogPrinterC1EPKc19android_LogPriorityS2_b"
+  },
+  {
+   "name" : "_ZN7android10LogPrinterC2EPKc19android_LogPriorityS2_b"
+  },
+  {
+   "name" : "_ZN7android10VectorImpl11appendArrayEPKvm"
+  },
+  {
+   "name" : "_ZN7android10VectorImpl11setCapacityEm"
+  },
+  {
+   "name" : "_ZN7android10VectorImpl12appendVectorERKS0_"
+  },
+  {
+   "name" : "_ZN7android10VectorImpl13editArrayImplEv"
+  },
+  {
+   "name" : "_ZN7android10VectorImpl13finish_vectorEv"
+  },
+  {
+   "name" : "_ZN7android10VectorImpl13insertArrayAtEPKvmm"
+  },
+  {
+   "name" : "_ZN7android10VectorImpl13removeItemsAtEmm"
+  },
+  {
+   "name" : "_ZN7android10VectorImpl14insertVectorAtERKS0_m"
+  },
+  {
+   "name" : "_ZN7android10VectorImpl15release_storageEv"
+  },
+  {
+   "name" : "_ZN7android10VectorImpl16editItemLocationEm"
+  },
+  {
+   "name" : "_ZN7android10VectorImpl3addEPKv"
+  },
+  {
+   "name" : "_ZN7android10VectorImpl3addEv"
+  },
+  {
+   "name" : "_ZN7android10VectorImpl3popEv"
+  },
+  {
+   "name" : "_ZN7android10VectorImpl4pushEPKv"
+  },
+  {
+   "name" : "_ZN7android10VectorImpl4pushEv"
+  },
+  {
+   "name" : "_ZN7android10VectorImpl4sortEPFiPKvS2_E"
+  },
+  {
+   "name" : "_ZN7android10VectorImpl4sortEPFiPKvS2_PvES3_"
+  },
+  {
+   "name" : "_ZN7android10VectorImpl5_growEmm"
+  },
+  {
+   "name" : "_ZN7android10VectorImpl5clearEv"
+  },
+  {
+   "name" : "_ZN7android10VectorImpl6resizeEm"
+  },
+  {
+   "name" : "_ZN7android10VectorImpl7_shrinkEmm"
+  },
+  {
+   "name" : "_ZN7android10VectorImpl8insertAtEPKvmm"
+  },
+  {
+   "name" : "_ZN7android10VectorImpl8insertAtEmm"
+  },
+  {
+   "name" : "_ZN7android10VectorImpl9replaceAtEPKvm"
+  },
+  {
+   "name" : "_ZN7android10VectorImpl9replaceAtEm"
+  },
+  {
+   "name" : "_ZN7android10VectorImplC2ERKS0_"
+  },
+  {
+   "name" : "_ZN7android10VectorImplC2Emj"
+  },
+  {
+   "name" : "_ZN7android10VectorImplD0Ev"
+  },
+  {
+   "name" : "_ZN7android10VectorImplD1Ev"
+  },
+  {
+   "name" : "_ZN7android10VectorImplD2Ev"
+  },
+  {
+   "name" : "_ZN7android10VectorImplaSERKS0_"
+  },
+  {
+   "name" : "_ZN7android11uptimeNanosEv"
+  },
+  {
+   "name" : "_ZN7android12NativeHandle6createEP13native_handleb"
+  },
+  {
+   "name" : "_ZN7android12NativeHandleC1EP13native_handleb"
+  },
+  {
+   "name" : "_ZN7android12NativeHandleC2EP13native_handleb"
+  },
+  {
+   "name" : "_ZN7android12NativeHandleD1Ev"
+  },
+  {
+   "name" : "_ZN7android12NativeHandleD2Ev"
+  },
+  {
+   "name" : "_ZN7android12SharedBuffer5allocEm"
+  },
+  {
+   "name" : "_ZN7android12SharedBuffer7deallocEPKS0_"
+  },
+  {
+   "name" : "_ZN7android12uptimeMillisEv"
+  },
+  {
+   "name" : "_ZN7android13PrefixPrinter9printLineEPKc"
+  },
+  {
+   "name" : "_ZN7android13PrefixPrinterC1ERNS_7PrinterEPKc"
+  },
+  {
+   "name" : "_ZN7android13PrefixPrinterC2ERNS_7PrinterEPKc"
+  },
+  {
+   "name" : "_ZN7android14LooperCallbackD0Ev"
+  },
+  {
+   "name" : "_ZN7android14LooperCallbackD1Ev"
+  },
+  {
+   "name" : "_ZN7android14LooperCallbackD2Ev"
+  },
+  {
+   "name" : "_ZN7android14MessageHandlerD0Ev"
+  },
+  {
+   "name" : "_ZN7android14MessageHandlerD1Ev"
+  },
+  {
+   "name" : "_ZN7android14MessageHandlerD2Ev"
+  },
+  {
+   "name" : "_ZN7android14String8Printer9printLineEPKc"
+  },
+  {
+   "name" : "_ZN7android14String8PrinterC1EPNS_7String8EPKc"
+  },
+  {
+   "name" : "_ZN7android14String8PrinterC2EPNS_7String8EPKc"
+  },
+  {
+   "name" : "_ZN7android14sp_report_raceEv"
+  },
+  {
+   "name" : "_ZN7android14statusToStringEi"
+  },
+  {
+   "name" : "_ZN7android15elapsedRealtimeEv"
+  },
+  {
+   "name" : "_ZN7android16SortedVectorImpl3addEPKv"
+  },
+  {
+   "name" : "_ZN7android16SortedVectorImpl5mergeERKNS_10VectorImplE"
+  },
+  {
+   "name" : "_ZN7android16SortedVectorImpl5mergeERKS0_"
+  },
+  {
+   "name" : "_ZN7android16SortedVectorImpl6removeEPKv"
+  },
+  {
+   "name" : "_ZN7android16SortedVectorImplC2ERKNS_10VectorImplE"
+  },
+  {
+   "name" : "_ZN7android16SortedVectorImplC2Emj"
+  },
+  {
+   "name" : "_ZN7android16SortedVectorImplD0Ev"
+  },
+  {
+   "name" : "_ZN7android16SortedVectorImplD1Ev"
+  },
+  {
+   "name" : "_ZN7android16SortedVectorImplD2Ev"
+  },
+  {
+   "name" : "_ZN7android16SortedVectorImplaSERKS0_"
+  },
+  {
+   "name" : "_ZN7android17JenkinsHashWhitenEj"
+  },
+  {
+   "name" : "_ZN7android18WeakMessageHandler13handleMessageERKNS_7MessageE"
+  },
+  {
+   "name" : "_ZN7android18WeakMessageHandlerC1ERKNS_2wpINS_14MessageHandlerEEE"
+  },
+  {
+   "name" : "_ZN7android18WeakMessageHandlerC2ERKNS_2wpINS_14MessageHandlerEEE"
+  },
+  {
+   "name" : "_ZN7android18WeakMessageHandlerD0Ev"
+  },
+  {
+   "name" : "_ZN7android18WeakMessageHandlerD1Ev"
+  },
+  {
+   "name" : "_ZN7android18WeakMessageHandlerD2Ev"
+  },
+  {
+   "name" : "_ZN7android19JenkinsHashMixBytesEjPKhm"
+  },
+  {
+   "name" : "_ZN7android19elapsedRealtimeNanoEv"
+  },
+  {
+   "name" : "_ZN7android20JenkinsHashMixShortsEjPKtm"
+  },
+  {
+   "name" : "_ZN7android20SimpleLooperCallback11handleEventEiiPv"
+  },
+  {
+   "name" : "_ZN7android20SimpleLooperCallbackC1EPFiiiPvE"
+  },
+  {
+   "name" : "_ZN7android20SimpleLooperCallbackC2EPFiiiPvE"
+  },
+  {
+   "name" : "_ZN7android20SimpleLooperCallbackD0Ev"
+  },
+  {
+   "name" : "_ZN7android20SimpleLooperCallbackD1Ev"
+  },
+  {
+   "name" : "_ZN7android20SimpleLooperCallbackD2Ev"
+  },
+  {
+   "name" : "_ZN7android21report_sysprop_changeEv"
+  },
+  {
+   "name" : "_ZN7android23sp_report_stack_pointerEv"
+  },
+  {
+   "name" : "_ZN7android27add_sysprop_change_callbackEPFvvEi"
+  },
+  {
+   "name" : "_ZN7android30get_report_sysprop_change_funcEv"
+  },
+  {
+   "name" : "_ZN7android47LightRefBase_reportIncStrongRequireStrongFailedEPKv"
+  },
+  {
+   "name" : "_ZN7android6Looper10initTLSKeyEv"
+  },
+  {
+   "name" : "_ZN7android6Looper11sendMessageERKNS_2spINS_14MessageHandlerEEERKNS_7MessageE"
+  },
+  {
+   "name" : "_ZN7android6Looper12getForThreadEv"
+  },
+  {
+   "name" : "_ZN7android6Looper12setForThreadERKNS_2spIS0_EE"
+  },
+  {
+   "name" : "_ZN7android6Looper14removeMessagesERKNS_2spINS_14MessageHandlerEEE"
+  },
+  {
+   "name" : "_ZN7android6Looper14removeMessagesERKNS_2spINS_14MessageHandlerEEEi"
+  },
+  {
+   "name" : "_ZN7android6Looper16threadDestructorEPv"
+  },
+  {
+   "name" : "_ZN7android6Looper17sendMessageAtTimeElRKNS_2spINS_14MessageHandlerEEERKNS_7MessageE"
+  },
+  {
+   "name" : "_ZN7android6Looper18rebuildEpollLockedEv"
+  },
+  {
+   "name" : "_ZN7android6Looper18sendMessageDelayedElRKNS_2spINS_14MessageHandlerEEERKNS_7MessageE"
+  },
+  {
+   "name" : "_ZN7android6Looper26removeSequenceNumberLockedEm"
+  },
+  {
+   "name" : "_ZN7android6Looper26scheduleEpollRebuildLockedEv"
+  },
+  {
+   "name" : "_ZN7android6Looper4wakeEv"
+  },
+  {
+   "name" : "_ZN7android6Looper5addFdEiiiPFiiiPvES1_"
+  },
+  {
+   "name" : "_ZN7android6Looper5addFdEiiiRKNS_2spINS_14LooperCallbackEEEPv"
+  },
+  {
+   "name" : "_ZN7android6Looper6awokenEv"
+  },
+  {
+   "name" : "_ZN7android6Looper7pollAllEiPiS1_PPv"
+  },
+  {
+   "name" : "_ZN7android6Looper7prepareEi"
+  },
+  {
+   "name" : "_ZN7android6Looper8pollOnceEiPiS1_PPv"
+  },
+  {
+   "name" : "_ZN7android6Looper8removeFdEi"
+  },
+  {
+   "name" : "_ZN7android6Looper9pollInnerEi"
+  },
+  {
+   "name" : "_ZN7android6LooperC1Eb"
+  },
+  {
+   "name" : "_ZN7android6LooperC2Eb"
+  },
+  {
+   "name" : "_ZN7android6LooperD0Ev"
+  },
+  {
+   "name" : "_ZN7android6LooperD1Ev"
+  },
+  {
+   "name" : "_ZN7android6LooperD2Ev"
+  },
+  {
+   "name" : "_ZN7android6Thread10readyToRunEv"
+  },
+  {
+   "name" : "_ZN7android6Thread11_threadLoopEPv"
+  },
+  {
+   "name" : "_ZN7android6Thread11requestExitEv"
+  },
+  {
+   "name" : "_ZN7android6Thread18requestExitAndWaitEv"
+  },
+  {
+   "name" : "_ZN7android6Thread3runEPKcim"
+  },
+  {
+   "name" : "_ZN7android6Thread4joinEv"
+  },
+  {
+   "name" : "_ZN7android6ThreadC2Eb"
+  },
+  {
+   "name" : "_ZN7android6ThreadD0Ev"
+  },
+  {
+   "name" : "_ZN7android6ThreadD1Ev"
+  },
+  {
+   "name" : "_ZN7android6ThreadD2Ev"
+  },
+  {
+   "name" : "_ZN7android7FileMap6adviseENS0_9MapAdviceE"
+  },
+  {
+   "name" : "_ZN7android7FileMap6createEPKcilmb"
+  },
+  {
+   "name" : "_ZN7android7FileMapC1EOS0_"
+  },
+  {
+   "name" : "_ZN7android7FileMapC1Ev"
+  },
+  {
+   "name" : "_ZN7android7FileMapC2EOS0_"
+  },
+  {
+   "name" : "_ZN7android7FileMapC2Ev"
+  },
+  {
+   "name" : "_ZN7android7FileMapD1Ev"
+  },
+  {
+   "name" : "_ZN7android7FileMapD2Ev"
+  },
+  {
+   "name" : "_ZN7android7FileMapaSEOS0_"
+  },
+  {
+   "name" : "_ZN7android7Printer15printFormatLineEPKcz"
+  },
+  {
+   "name" : "_ZN7android7PrinterC2Ev"
+  },
+  {
+   "name" : "_ZN7android7PrinterD0Ev"
+  },
+  {
+   "name" : "_ZN7android7PrinterD1Ev"
+  },
+  {
+   "name" : "_ZN7android7PrinterD2Ev"
+  },
+  {
+   "name" : "_ZN7android7RefBase10onFirstRefEv"
+  },
+  {
+   "name" : "_ZN7android7RefBase10renameRefsEmRKNS_16ReferenceRenamerE"
+  },
+  {
+   "name" : "_ZN7android7RefBase11renameRefIdEPNS0_12weakref_typeEPKvS4_"
+  },
+  {
+   "name" : "_ZN7android7RefBase11renameRefIdEPS0_PKvS3_"
+  },
+  {
+   "name" : "_ZN7android7RefBase12weakref_type14attemptIncWeakEPKv"
+  },
+  {
+   "name" : "_ZN7android7RefBase12weakref_type16attemptIncStrongEPKv"
+  },
+  {
+   "name" : "_ZN7android7RefBase12weakref_type18incWeakRequireWeakEPKv"
+  },
+  {
+   "name" : "_ZN7android7RefBase12weakref_type7decWeakEPKv"
+  },
+  {
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+     "referenced_type" : "_ZTIi"
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+   "source_file" : "system/core/libutils/include/utils/Timers.h"
+  },
+  {
+   "function_name" : "toMillisecondTimeoutDelay",
+   "linker_set_key" : "toMillisecondTimeoutDelay",
+   "parameters" :
+   [
+    {
+     "referenced_type" : "_ZTIl"
+    },
+    {
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+    }
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+   "return_type" : "_ZTIi",
+   "source_file" : "system/core/libutils/include/utils/Timers.h"
+  },
+  {
+   "function_name" : "utf16_to_utf8",
+   "linker_set_key" : "utf16_to_utf8",
+   "parameters" :
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+   "source_file" : "system/core/libutils/include/utils/Unicode.h"
+  },
+  {
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diff --git a/libutils/abi-dumps/arm_arm64/source-based/libutils.so.lsdump b/libutils/abi-dumps/arm_arm64/source-based/libutils.so.lsdump
new file mode 100644
index 0000000..f88da15
--- /dev/null
+++ b/libutils/abi-dumps/arm_arm64/source-based/libutils.so.lsdump
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+   "return_type" : "_ZTIx",
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+  },
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+     "access" : "private",
+     "field_name" : "mLength",
+     "field_offset" : 128,
+     "referenced_type" : "_ZTIj"
+    },
+    {
+     "access" : "private",
+     "field_name" : "mCurrent",
+     "field_offset" : 160,
+     "referenced_type" : "_ZTIPKc"
+    },
+    {
+     "access" : "private",
+     "field_name" : "mLineNumber",
+     "field_offset" : 192,
+     "referenced_type" : "_ZTIi"
+    }
+   ],
+   "linker_set_key" : "_ZTIN7android9TokenizerE",
+   "name" : "android::Tokenizer",
+   "record_kind" : "class",
+   "referenced_type" : "_ZTIN7android9TokenizerE",
+   "self_type" : "_ZTIN7android9TokenizerE",
+   "size" : 28,
+   "source_file" : "system/core/libutils/include/utils/Tokenizer.h"
+  },
+  {
+   "alignment" : 4,
+   "fields" :
+   [
+    {
+     "field_name" : "buf",
+     "referenced_type" : "_ZTIA5121_h"
+    },
+    {
+     "field_name" : "entry",
+     "referenced_type" : "_ZTI12logger_entry"
+    }
+   ],
+   "is_anonymous" : true,
+   "linker_set_key" : "_ZTIN7log_msgUt_E",
+   "name" : "log_msg::(anonymous)",
+   "record_kind" : "union",
+   "referenced_type" : "_ZTIN7log_msgUt_E",
+   "self_type" : "_ZTIN7log_msgUt_E",
+   "size" : 5124,
+   "source_file" : "system/logging/liblog/include_vndk/log/log_read.h"
+  }
+ ],
+ "rvalue_reference_types" :
+ [
+  {
+   "alignment" : 4,
+   "linker_set_key" : "_ZTION7android2spINS_12NativeHandleEEE",
+   "name" : "android::sp<android::NativeHandle> &&",
+   "referenced_type" : "_ZTIN7android2spINS_12NativeHandleEEE",
+   "self_type" : "_ZTION7android2spINS_12NativeHandleEEE",
+   "size" : 4,
+   "source_file" : "system/core/libutils/include/utils/StrongPointer.h"
+  },
+  {
+   "alignment" : 4,
+   "linker_set_key" : "_ZTION7android2spINS_14MessageHandlerEEE",
+   "name" : "android::sp<android::MessageHandler> &&",
+   "referenced_type" : "_ZTIN7android2spINS_14MessageHandlerEEE",
+   "self_type" : "_ZTION7android2spINS_14MessageHandlerEEE",
+   "size" : 4,
+   "source_file" : "system/core/libutils/include/utils/StrongPointer.h"
+  },
+  {
+   "alignment" : 4,
+   "linker_set_key" : "_ZTION7android2spINS_20SimpleLooperCallbackEEE",
+   "name" : "android::sp<android::SimpleLooperCallback> &&",
+   "referenced_type" : "_ZTIN7android2spINS_20SimpleLooperCallbackEEE",
+   "self_type" : "_ZTION7android2spINS_20SimpleLooperCallbackEEE",
+   "size" : 4,
+   "source_file" : "system/core/libutils/include/utils/StrongPointer.h"
+  },
+  {
+   "alignment" : 4,
+   "linker_set_key" : "_ZTION7android2spINS_6LooperEEE",
+   "name" : "android::sp<android::Looper> &&",
+   "referenced_type" : "_ZTIN7android2spINS_6LooperEEE",
+   "self_type" : "_ZTION7android2spINS_6LooperEEE",
+   "size" : 4,
+   "source_file" : "system/core/libutils/include/utils/StrongPointer.h"
+  },
+  {
+   "alignment" : 4,
+   "linker_set_key" : "_ZTION7android2spINS_6ThreadEEE",
+   "name" : "android::sp<android::Thread> &&",
+   "referenced_type" : "_ZTIN7android2spINS_6ThreadEEE",
+   "self_type" : "_ZTION7android2spINS_6ThreadEEE",
+   "size" : 4,
+   "source_file" : "system/core/libutils/include/utils/StrongPointer.h"
+  },
+  {
+   "alignment" : 4,
+   "linker_set_key" : "_ZTION7android4base14unique_fd_implINS0_13DefaultCloserEEE",
+   "name" : "android::base::unique_fd_impl<android::base::DefaultCloser> &&",
+   "referenced_type" : "_ZTIN7android4base14unique_fd_implINS0_13DefaultCloserEEE",
+   "self_type" : "_ZTION7android4base14unique_fd_implINS0_13DefaultCloserEEE",
+   "size" : 4,
+   "source_file" : "system/libbase/include/android-base/unique_fd.h"
+  },
+  {
+   "alignment" : 4,
+   "linker_set_key" : "_ZTION7android7FileMapE",
+   "name" : "android::FileMap &&",
+   "referenced_type" : "_ZTIN7android7FileMapE",
+   "self_type" : "_ZTION7android7FileMapE",
+   "size" : 4,
+   "source_file" : "system/core/libutils/include/utils/FileMap.h"
+  },
+  {
+   "alignment" : 4,
+   "linker_set_key" : "_ZTION7android8String16E",
+   "name" : "android::String16 &&",
+   "referenced_type" : "_ZTIN7android8String16E",
+   "self_type" : "_ZTION7android8String16E",
+   "size" : 4,
+   "source_file" : "system/core/libutils/include/utils/String16.h"
+  }
+ ]
+}
diff --git a/libutils/include/utils/RefBase.h b/libutils/include/utils/RefBase.h
index f3acd6f..5e3fa7d 100644
--- a/libutils/include/utils/RefBase.h
+++ b/libutils/include/utils/RefBase.h
@@ -210,6 +210,7 @@
 
 #include <atomic>
 #include <functional>
+#include <memory>
 #include <type_traits>  // for common_type.
 
 #include <stdint.h>
diff --git a/property_service/libpropertyinfoserializer/property_info_serializer_test.cpp b/property_service/libpropertyinfoserializer/property_info_serializer_test.cpp
index 77cbdd4..a484441 100644
--- a/property_service/libpropertyinfoserializer/property_info_serializer_test.cpp
+++ b/property_service/libpropertyinfoserializer/property_info_serializer_test.cpp
@@ -399,7 +399,6 @@
       {"dalvik.vm.lockprof.threshold", "u:object_r:dalvik_prop:s0"},
       {"dalvik.vm.stack-trace-file", "u:object_r:dalvik_prop:s0"},
       {"dalvik.vm.usejit", "u:object_r:dalvik_prop:s0"},
-      {"dalvik.vm.usejitprofiles", "u:object_r:dalvik_prop:s0"},
       {"debug.atrace.tags.enableflags", "u:object_r:debug_prop:s0"},
       {"debug.force_rtl", "u:object_r:debug_prop:s0"},
       {"dev.bootcomplete", "u:object_r:system_prop:s0"},
diff --git a/rootdir/etc/linker.config.json b/rootdir/etc/linker.config.json
index c88c7ff..47f77b1 100644
--- a/rootdir/etc/linker.config.json
+++ b/rootdir/etc/linker.config.json
@@ -22,8 +22,6 @@
     "libnetd_resolv.so",
     // netd
     "libnetd_updatable.so",
-    // nn
-    "libneuralnetworks.so",
     // statsd
     "libstatspull.so",
     "libstatssocket.so",
@@ -31,6 +29,9 @@
     "libadb_pairing_auth.so",
     "libadb_pairing_connection.so",
     "libadb_pairing_server.so"
+
+    // LLNDK libraries in APEXes will be added automatically from the build,
+    // using build variable LLNDK_MOVED_TO_APEX_LIBRARIES.
   ],
   "provideLibs": [
     "libaptX_encoder.so",
diff --git a/rootdir/init.rc b/rootdir/init.rc
index ec760d3..881564c 100644
--- a/rootdir/init.rc
+++ b/rootdir/init.rc
@@ -55,10 +55,11 @@
     # Read more in b/136247322
     write /sys/module/dm_verity/parameters/prefetch_cluster 0
 
-    # Generate ld.config.txt for early executed processes
-    exec -- /system/bin/bootstrap/linkerconfig --target /linkerconfig/bootstrap
+    # Generate empty ld.config.txt for early executed processes which rely on
+    # /system/lib libraries.
+    write /linkerconfig/bootstrap/ld.config.txt \#
+    write /linkerconfig/default/ld.config.txt \#
     chmod 644 /linkerconfig/bootstrap/ld.config.txt
-    copy /linkerconfig/bootstrap/ld.config.txt /linkerconfig/default/ld.config.txt
     chmod 644 /linkerconfig/default/ld.config.txt
 
     # Mount bootstrap linker configuration as current
@@ -489,18 +490,26 @@
 service boringssl_self_test32 /system/bin/boringssl_self_test32
     reboot_on_failure reboot,boringssl-self-check-failed
     stdio_to_kmsg
+    # Explicitly specify that boringssl_self_test32 doesn't require any capabilities
+    capabilities
 
 service boringssl_self_test64 /system/bin/boringssl_self_test64
     reboot_on_failure reboot,boringssl-self-check-failed
     stdio_to_kmsg
+    # Explicitly specify that boringssl_self_test64 doesn't require any capabilities
+    capabilities
 
 service boringssl_self_test_apex32 /apex/com.android.conscrypt/bin/boringssl_self_test32
     reboot_on_failure reboot,boringssl-self-check-failed
     stdio_to_kmsg
+    # Explicitly specify that boringssl_self_test_apex32 doesn't require any capabilities
+    capabilities
 
 service boringssl_self_test_apex64 /apex/com.android.conscrypt/bin/boringssl_self_test64
     reboot_on_failure reboot,boringssl-self-check-failed
     stdio_to_kmsg
+    # Explicitly specify that boringssl_self_test_apex64 doesn't require any capabilities
+    capabilities
 
 
 # Healthd can trigger a full boot from charger mode by signaling this
@@ -535,10 +544,6 @@
     # /data, which in turn can only be loaded when system properties are present.
     trigger post-fs-data
 
-    # APEXes are ready to use. apex-ready is a public trigger similar to apexd.status=ready which
-    # is a system-private property.
-    trigger apex-ready
-
     # Should be before netd, but after apex, properties and logging is available.
     trigger load_bpf_programs
 
@@ -842,7 +847,7 @@
     # Delete any stale files owned by the old virtualizationservice uid (b/230056726).
     chmod 0770 /data/misc/virtualizationservice
     exec - virtualizationservice system -- /bin/rm -rf /data/misc/virtualizationservice
-    mkdir /data/misc/virtualizationservice 0770 system system
+    mkdir /data/misc/virtualizationservice 0771 system system
 
     # /data/preloads uses encryption=None because it only contains preloaded
     # files that are public information, similar to the system image.
@@ -940,22 +945,29 @@
     restorecon /data/media
     exec - media_rw media_rw -- /system/bin/chattr +F /data/media
 
-    # A tmpfs directory, which will contain all apps CE DE data directory that
-    # bind mount from the original source.
+    # A tmpfs directory, which will contain all apps and sdk sandbox CE and DE
+    # data directory that bind mount from the original source.
     mount tmpfs tmpfs /data_mirror nodev noexec nosuid mode=0700,uid=0,gid=1000
     restorecon /data_mirror
     mkdir /data_mirror/data_ce 0700 root root
     mkdir /data_mirror/data_de 0700 root root
+    mkdir /data_mirror/misc_ce 0700 root root
+    mkdir /data_mirror/misc_de 0700 root root
 
     # Create CE and DE data directory for default volume
     mkdir /data_mirror/data_ce/null 0700 root root
     mkdir /data_mirror/data_de/null 0700 root root
+    mkdir /data_mirror/misc_ce/null 0700 root root
+    mkdir /data_mirror/misc_de/null 0700 root root
 
     # Bind mount CE and DE data directory to mirror's default volume directory.
-    # The 'slave' option (MS_SLAVE) is needed to cause the later bind mount of
-    # /data/data onto /data/user/0 to propagate to /data_mirror/data_ce/null/0.
-    mount none /data/user /data_mirror/data_ce/null bind rec slave
+    # Note that because the /data mount has the "shared" propagation type, the
+    # later bind mount of /data/data onto /data/user/0 will automatically
+    # propagate to /data_mirror/data_ce/null/0 as well.
+    mount none /data/user /data_mirror/data_ce/null bind rec
     mount none /data/user_de /data_mirror/data_de/null bind rec
+    mount none /data/misc_ce /data_mirror/misc_ce/null bind rec
+    mount none /data/misc_de /data_mirror/misc_de/null bind rec
 
     # Create mirror directory for jit profiles
     mkdir /data_mirror/cur_profiles 0700 root root
@@ -1037,6 +1049,9 @@
     # Enable FUSE by default
     setprop persist.sys.fuse true
 
+    # Update dm-verity state and set partition.*.verified properties.
+    verity_update_state
+
 # It is recommended to put unnecessary data/ initialization from post-fs-data
 # to start-zygote in device's init.rc to unblock zygote start.
 on zygote-start && property:ro.crypto.state=unencrypted
@@ -1108,6 +1123,7 @@
     # are not aware of using fsync()/sync() to prepare sudden power-cut.
     write /dev/sys/fs/by-name/userdata/cp_interval 200
     write /dev/sys/fs/by-name/userdata/gc_urgent_sleep_time 50
+    write /dev/sys/fs/by-name/userdata/iostat_period_ms 1000
     write /dev/sys/fs/by-name/userdata/iostat_enable 1
 
     # set readahead multiplier for POSIX_FADV_SEQUENTIAL files
@@ -1175,9 +1191,6 @@
     # Define default initial receive window size in segments.
     setprop net.tcp_def_init_rwnd 60
 
-    # Update dm-verity state and set partition.*.verified properties.
-    verity_update_state
-
     # Start standard binderized HAL daemons
     class_start hal
 
@@ -1222,7 +1235,7 @@
 # controlling access. On older kernels, the paranoid value is the only means of
 # controlling access. It is normally 3 (allow only root), but the shell user
 # can lower it to 1 (allowing thread-scoped pofiling) via security.perf_harden.
-on property:sys.init.perf_lsm_hooks=1
+on load_bpf_programs && property:sys.init.perf_lsm_hooks=1
     write /proc/sys/kernel/perf_event_paranoid -1
 on property:security.perf_harden=0 && property:sys.init.perf_lsm_hooks=""
     write /proc/sys/kernel/perf_event_paranoid 1
@@ -1314,7 +1327,6 @@
 on userspace-reboot-resume
   trigger userspace-reboot-fs-remount
   trigger post-fs-data
-  trigger apex-ready
   trigger zygote-start
   trigger early-boot
   trigger boot
diff --git a/rootdir/init.zygote32.rc b/rootdir/init.zygote32.rc
index 63b09c0..2f0ec8a 100644
--- a/rootdir/init.zygote32.rc
+++ b/rootdir/init.zygote32.rc
@@ -7,6 +7,9 @@
     socket usap_pool_primary stream 660 root system
     onrestart exec_background - system system -- /system/bin/vdc volume abort_fuse
     onrestart write /sys/power/state on
+    # NOTE: If the wakelock name here is changed, then also
+    # update it in SystemSuspend.cpp
+    onrestart write /sys/power/wake_lock zygote_kwl
     onrestart restart audioserver
     onrestart restart cameraserver
     onrestart restart media
diff --git a/rootdir/init.zygote64.rc b/rootdir/init.zygote64.rc
index b6ca5c0..74a64c8 100644
--- a/rootdir/init.zygote64.rc
+++ b/rootdir/init.zygote64.rc
@@ -7,6 +7,9 @@
     socket usap_pool_primary stream 660 root system
     onrestart exec_background - system system -- /system/bin/vdc volume abort_fuse
     onrestart write /sys/power/state on
+    # NOTE: If the wakelock name here is changed, then also
+    # update it in SystemSuspend.cpp
+    onrestart write /sys/power/wake_lock zygote_kwl
     onrestart restart audioserver
     onrestart restart cameraserver
     onrestart restart media
diff --git a/rootdir/ueventd.rc b/rootdir/ueventd.rc
index 4ec59af..0b7ffb8 100644
--- a/rootdir/ueventd.rc
+++ b/rootdir/ueventd.rc
@@ -69,8 +69,8 @@
 # CDMA radio interface MUX
 /dev/ppp                  0660   radio      vpn
 
-/dev/kvm                  0600   system     system
-/dev/vhost-vsock          0600   system	    system
+/dev/kvm                  0666   root       root
+/dev/vhost-vsock          0666   root       root
 
 # sysfs properties
 /sys/devices/platform/trusty.*      trusty_version        0440  root   log
diff --git a/trusty/confirmationui/Android.bp b/trusty/confirmationui/Android.bp
index 0922415..c5c5012 100644
--- a/trusty/confirmationui/Android.bp
+++ b/trusty/confirmationui/Android.bp
@@ -24,21 +24,23 @@
 }
 
 cc_binary {
-    name: "android.hardware.confirmationui@1.0-service.trusty",
+    name: "android.hardware.confirmationui-service.trusty",
     relative_install_path: "hw",
     vendor: true,
     shared_libs: [
-        "android.hardware.confirmationui@1.0",
+        "android.hardware.confirmationui-V1-ndk",
         "android.hardware.confirmationui.not-so-secure-input",
-        "android.hardware.confirmationui@1.0-lib.trusty",
+        "android.hardware.confirmationui-lib.trusty",
+        "libbinder_ndk",
+        "libteeui_hal_support",
         "libbase",
         "libhidlbase",
         "libutils",
     ],
 
-    init_rc: ["android.hardware.confirmationui@1.0-service.trusty.rc"],
+    init_rc: ["android.hardware.confirmationui-service.trusty.rc"],
 
-    vintf_fragments: ["android.hardware.confirmationui@1.0-service.trusty.xml"],
+    vintf_fragments: ["android.hardware.confirmationui-service.trusty.xml"],
 
     srcs: [
         "service.cpp",
@@ -51,18 +53,39 @@
     ],
 }
 
-cc_library {
-    name: "android.hardware.confirmationui@1.0-lib.trusty",
+cc_fuzz {
+    name: "android.hardware.confirmationui-service.trusty_fuzzer",
+    defaults: ["service_fuzzer_defaults"],
     vendor: true,
     shared_libs: [
-        "android.hardware.confirmationui@1.0",
-        "android.hardware.keymaster@4.0",
+        "android.hardware.confirmationui-V1-ndk",
+        "android.hardware.confirmationui.not-so-secure-input",
+        "android.hardware.confirmationui-lib.trusty",
+        "liblog",
+    ],
+    srcs: ["fuzzer.cpp"],
+    fuzz_config: {
+        cc: [
+            "nyamagoud@google.com",
+        ],
+    },
+}
+
+cc_library {
+    name: "android.hardware.confirmationui-lib.trusty",
+    defaults: [
+        "keymint_use_latest_hal_aidl_ndk_shared",
+    ],
+    vendor: true,
+    shared_libs: [
+        "android.hardware.confirmationui-V1-ndk",
         "libbase",
+        "libcutils",
         "libdmabufheap",
-        "libhidlbase",
         "libteeui_hal_support",
         "libtrusty",
         "libutils",
+        "libbinder_ndk",
     ],
 
     export_include_dirs: ["include"],
diff --git a/trusty/confirmationui/TrustyConfirmationUI.cpp b/trusty/confirmationui/TrustyConfirmationUI.cpp
index c6625e0..f01a4e1 100644
--- a/trusty/confirmationui/TrustyConfirmationUI.cpp
+++ b/trusty/confirmationui/TrustyConfirmationUI.cpp
@@ -18,8 +18,6 @@
 #include "TrustyConfirmationUI.h"
 
 #include <android-base/logging.h>
-#include <android/hardware/confirmationui/1.0/types.h>
-#include <android/hardware/keymaster/4.0/types.h>
 #include <fcntl.h>
 #include <linux/input.h>
 #include <poll.h>
@@ -42,12 +40,7 @@
 #include <tuple>
 #include <vector>
 
-namespace android {
-namespace hardware {
-namespace confirmationui {
-namespace V1_0 {
-namespace implementation {
-
+namespace aidl::android::hardware::confirmationui {
 using namespace secure_input;
 
 using ::android::trusty::confirmationui::TrustyAppError;
@@ -64,8 +57,6 @@
 
 using ::secure_input::createSecureInput;
 
-using ::android::hardware::keymaster::V4_0::HardwareAuthToken;
-
 using ::std::tie;
 
 using TeeuiRc = ::teeui::ResponseCode;
@@ -87,46 +78,47 @@
     void release() { f_ = {}; }
 };
 
-ResponseCode convertRc(TeeuiRc trc) {
+int convertRc(TeeuiRc trc) {
     static_assert(
-        uint32_t(TeeuiRc::OK) == uint32_t(ResponseCode::OK) &&
-            uint32_t(TeeuiRc::Canceled) == uint32_t(ResponseCode::Canceled) &&
-            uint32_t(TeeuiRc::Aborted) == uint32_t(ResponseCode::Aborted) &&
-            uint32_t(TeeuiRc::OperationPending) == uint32_t(ResponseCode::OperationPending) &&
-            uint32_t(TeeuiRc::Ignored) == uint32_t(ResponseCode::Ignored) &&
-            uint32_t(TeeuiRc::SystemError) == uint32_t(ResponseCode::SystemError) &&
-            uint32_t(TeeuiRc::Unimplemented) == uint32_t(ResponseCode::Unimplemented) &&
-            uint32_t(TeeuiRc::Unexpected) == uint32_t(ResponseCode::Unexpected) &&
-            uint32_t(TeeuiRc::UIError) == uint32_t(ResponseCode::UIError) &&
-            uint32_t(TeeuiRc::UIErrorMissingGlyph) == uint32_t(ResponseCode::UIErrorMissingGlyph) &&
+        uint32_t(TeeuiRc::OK) == uint32_t(IConfirmationUI::OK) &&
+            uint32_t(TeeuiRc::Canceled) == uint32_t(IConfirmationUI::CANCELED) &&
+            uint32_t(TeeuiRc::Aborted) == uint32_t(IConfirmationUI::ABORTED) &&
+            uint32_t(TeeuiRc::OperationPending) == uint32_t(IConfirmationUI::OPERATION_PENDING) &&
+            uint32_t(TeeuiRc::Ignored) == uint32_t(IConfirmationUI::IGNORED) &&
+            uint32_t(TeeuiRc::SystemError) == uint32_t(IConfirmationUI::SYSTEM_ERROR) &&
+            uint32_t(TeeuiRc::Unimplemented) == uint32_t(IConfirmationUI::UNIMPLEMENTED) &&
+            uint32_t(TeeuiRc::Unexpected) == uint32_t(IConfirmationUI::UNEXPECTED) &&
+            uint32_t(TeeuiRc::UIError) == uint32_t(IConfirmationUI::UI_ERROR) &&
+            uint32_t(TeeuiRc::UIErrorMissingGlyph) ==
+                uint32_t(IConfirmationUI::UI_ERROR_MISSING_GLYPH) &&
             uint32_t(TeeuiRc::UIErrorMessageTooLong) ==
-                uint32_t(ResponseCode::UIErrorMessageTooLong) &&
+                uint32_t(IConfirmationUI::UI_ERROR_MESSAGE_TOO_LONG) &&
             uint32_t(TeeuiRc::UIErrorMalformedUTF8Encoding) ==
-                uint32_t(ResponseCode::UIErrorMalformedUTF8Encoding),
+                uint32_t(IConfirmationUI::UI_ERROR_MALFORMED_UTF8ENCODING),
         "teeui::ResponseCode and "
         "::android::hardware::confirmationui::V1_0::Responsecude are out of "
         "sync");
-    return ResponseCode(trc);
+    return static_cast<int>(trc);
 }
 
 teeui::UIOption convertUIOption(UIOption uio) {
-    static_assert(uint32_t(UIOption::AccessibilityInverted) ==
+    static_assert(uint32_t(UIOption::ACCESSIBILITY_INVERTED) ==
                           uint32_t(teeui::UIOption::AccessibilityInverted) &&
-                      uint32_t(UIOption::AccessibilityMagnified) ==
+                      uint32_t(UIOption::ACCESSIBILITY_MAGNIFIED) ==
                           uint32_t(teeui::UIOption::AccessibilityMagnified),
                   "teeui::UIOPtion and ::android::hardware::confirmationui::V1_0::UIOption "
-                  "anre out of sync");
+                  "are out of sync");
     return teeui::UIOption(uio);
 }
 
-inline MsgString hidl2MsgString(const hidl_string& s) {
+inline MsgString stdString2MsgString(const string& s) {
     return {s.c_str(), s.c_str() + s.size()};
 }
-template <typename T> inline MsgVector<T> hidl2MsgVector(const hidl_vec<T>& v) {
+template <typename T> inline MsgVector<T> stdVector2MsgVector(const vector<T>& v) {
     return {v};
 }
 
-inline MsgVector<teeui::UIOption> hidl2MsgVector(const hidl_vec<UIOption>& v) {
+inline MsgVector<teeui::UIOption> stdVector2MsgVector(const vector<UIOption>& v) {
     MsgVector<teeui::UIOption> result(v.size());
     for (unsigned int i = 0; i < v.size(); ++i) {
         result[i] = convertUIOption(v[i]);
@@ -137,7 +129,7 @@
 }  // namespace
 
 TrustyConfirmationUI::TrustyConfirmationUI()
-    : listener_state_(ListenerState::None), prompt_result_(ResponseCode::Ignored) {}
+    : listener_state_(ListenerState::None), prompt_result_(IConfirmationUI::IGNORED) {}
 
 TrustyConfirmationUI::~TrustyConfirmationUI() {
     ListenerState state = listener_state_;
@@ -385,15 +377,16 @@
     //  ############################## Start 4th Phase - cleanup ##################################
 }
 
-// Methods from ::android::hardware::confirmationui::V1_0::IConfirmationUI
+// Methods from ::aidl::android::hardware::confirmationui::IConfirmationUI
 // follow.
-Return<ResponseCode> TrustyConfirmationUI::promptUserConfirmation(
-    const sp<IConfirmationResultCallback>& resultCB, const hidl_string& promptText,
-    const hidl_vec<uint8_t>& extraData, const hidl_string& locale,
-    const hidl_vec<UIOption>& uiOptions) {
+::ndk::ScopedAStatus TrustyConfirmationUI::promptUserConfirmation(
+    const shared_ptr<IConfirmationResultCallback>& resultCB, const vector<uint8_t>& promptTextBytes,
+    const vector<uint8_t>& extraData, const string& locale, const vector<UIOption>& uiOptions) {
     std::unique_lock<std::mutex> stateLock(listener_state_lock_, std::defer_lock);
+    string promptText(promptTextBytes.begin(), promptTextBytes.end());
     if (!stateLock.try_lock()) {
-        return ResponseCode::OperationPending;
+        return ndk::ScopedAStatus(
+            AStatus_fromServiceSpecificError(IConfirmationUI::OPERATION_PENDING));
     }
     switch (listener_state_) {
     case ListenerState::None:
@@ -401,23 +394,25 @@
     case ListenerState::Starting:
     case ListenerState::SetupDone:
     case ListenerState::Interactive:
-        return ResponseCode::OperationPending;
+        return ndk::ScopedAStatus(
+            AStatus_fromServiceSpecificError(IConfirmationUI::OPERATION_PENDING));
     case ListenerState::Terminating:
         callback_thread_.join();
         listener_state_ = ListenerState::None;
         break;
     default:
-        return ResponseCode::Unexpected;
+        return ndk::ScopedAStatus(AStatus_fromServiceSpecificError(IConfirmationUI::UNEXPECTED));
     }
 
     assert(listener_state_ == ListenerState::None);
 
     callback_thread_ = std::thread(
-        [this](sp<IConfirmationResultCallback> resultCB, hidl_string promptText,
-               hidl_vec<uint8_t> extraData, hidl_string locale, hidl_vec<UIOption> uiOptions) {
-            auto [trc, msg, token] =
-                promptUserConfirmation_(hidl2MsgString(promptText), hidl2MsgVector(extraData),
-                                        hidl2MsgString(locale), hidl2MsgVector(uiOptions));
+        [this](const shared_ptr<IConfirmationResultCallback>& resultCB, const string& promptText,
+               const vector<uint8_t>& extraData, const string& locale,
+               const vector<UIOption>& uiOptions) {
+            auto [trc, msg, token] = promptUserConfirmation_(
+                stdString2MsgString(promptText), stdVector2MsgVector(extraData),
+                stdString2MsgString(locale), stdVector2MsgVector(uiOptions));
             bool do_callback = (listener_state_ == ListenerState::Interactive ||
                                 listener_state_ == ListenerState::SetupDone) &&
                                resultCB;
@@ -426,7 +421,7 @@
             if (do_callback) {
                 auto error = resultCB->result(prompt_result_, msg, token);
                 if (!error.isOk()) {
-                    LOG(ERROR) << "Result callback failed " << error.description();
+                    LOG(ERROR) << "Result callback failed " << error.getDescription();
                 }
             } else {
                 listener_state_condv_.notify_all();
@@ -442,14 +437,14 @@
     if (listener_state_ == ListenerState::Terminating) {
         callback_thread_.join();
         listener_state_ = ListenerState::None;
-        return prompt_result_;
+        return ndk::ScopedAStatus(AStatus_fromServiceSpecificError(prompt_result_));
     }
-    return ResponseCode::OK;
+    return ndk::ScopedAStatus::ok();
 }
 
-Return<ResponseCode>
+::ndk::ScopedAStatus
 TrustyConfirmationUI::deliverSecureInputEvent(const HardwareAuthToken& secureInputToken) {
-    ResponseCode rc = ResponseCode::Ignored;
+    int rc = IConfirmationUI::IGNORED;
     {
         /*
          * deliverSecureInputEvent is only used by the VTS test to mock human input. A correct
@@ -467,13 +462,17 @@
         listener_state_condv_.wait(stateLock,
                                    [this] { return listener_state_ != ListenerState::SetupDone; });
 
-        if (listener_state_ != ListenerState::Interactive) return ResponseCode::Ignored;
+        if (listener_state_ != ListenerState::Interactive)
+            return ndk::ScopedAStatus(AStatus_fromServiceSpecificError(IConfirmationUI::IGNORED));
         auto sapp = app_.lock();
-        if (!sapp) return ResponseCode::Ignored;
+        if (!sapp)
+            return ndk::ScopedAStatus(AStatus_fromServiceSpecificError(IConfirmationUI::IGNORED));
         auto [error, response] =
             sapp->issueCmd<DeliverTestCommandMessage, DeliverTestCommandResponse>(
                 static_cast<teeui::TestModeCommands>(secureInputToken.challenge));
-        if (error != TrustyAppError::OK) return ResponseCode::SystemError;
+        if (error != TrustyAppError::OK)
+            return ndk::ScopedAStatus(
+                AStatus_fromServiceSpecificError(IConfirmationUI::SYSTEM_ERROR));
         auto& [trc] = response;
         if (trc != TeeuiRc::Ignored) secureInputDelivered_ = true;
         rc = convertRc(trc);
@@ -484,11 +483,14 @@
     // Canceled into OK. Canceled is only returned if the delivered event canceled
     // the operation, which means that the event was successfully delivered. Thus
     // we return OK.
-    if (rc == ResponseCode::Canceled) return ResponseCode::OK;
-    return rc;
+    if (rc == IConfirmationUI::CANCELED) return ndk::ScopedAStatus::ok();
+    if (rc != IConfirmationUI::OK) {
+        return ndk::ScopedAStatus(AStatus_fromServiceSpecificError(rc));
+    }
+    return ndk::ScopedAStatus::ok();
 }
 
-Return<void> TrustyConfirmationUI::abort() {
+::ndk::ScopedAStatus TrustyConfirmationUI::abort() {
     {
         std::unique_lock<std::mutex> stateLock(listener_state_lock_);
         if (listener_state_ == ListenerState::SetupDone ||
@@ -499,15 +501,11 @@
         }
     }
     listener_state_condv_.notify_all();
-    return Void();
+    return ndk::ScopedAStatus::ok();
 }
 
-android::sp<IConfirmationUI> createTrustyConfirmationUI() {
-    return new TrustyConfirmationUI();
+std::shared_ptr<IConfirmationUI> createTrustyConfirmationUI() {
+    return ndk::SharedRefBase::make<TrustyConfirmationUI>();
 }
 
-}  // namespace implementation
-}  // namespace V1_0
-}  // namespace confirmationui
-}  // namespace hardware
-}  // namespace android
+}  // namespace aidl::android::hardware::confirmationui
diff --git a/trusty/confirmationui/TrustyConfirmationUI.h b/trusty/confirmationui/TrustyConfirmationUI.h
index 0bd703c..6e85704 100644
--- a/trusty/confirmationui/TrustyConfirmationUI.h
+++ b/trusty/confirmationui/TrustyConfirmationUI.h
@@ -17,9 +17,11 @@
 #ifndef ANDROID_HARDWARE_CONFIRMATIONUI_V1_0_TRUSTY_CONFIRMATIONUI_H
 #define ANDROID_HARDWARE_CONFIRMATIONUI_V1_0_TRUSTY_CONFIRMATIONUI_H
 
-#include <android/hardware/confirmationui/1.0/IConfirmationUI.h>
-#include <android/hardware/keymaster/4.0/types.h>
-#include <hidl/Status.h>
+#include <aidl/android/hardware/confirmationui/BnConfirmationUI.h>
+#include <aidl/android/hardware/confirmationui/IConfirmationResultCallback.h>
+#include <aidl/android/hardware/confirmationui/UIOption.h>
+#include <aidl/android/hardware/security/keymint/HardwareAuthToken.h>
+#include <android/binder_manager.h>
 
 #include <atomic>
 #include <condition_variable>
@@ -30,35 +32,29 @@
 
 #include "TrustyApp.h"
 
-namespace android {
-namespace hardware {
-namespace confirmationui {
-namespace V1_0 {
-namespace implementation {
+namespace aidl::android::hardware::confirmationui {
 
-using ::android::sp;
-using ::android::hardware::hidl_array;
-using ::android::hardware::hidl_string;
-using ::android::hardware::hidl_vec;
-using ::android::hardware::Return;
-using ::android::hardware::Void;
+using std::shared_ptr;
+using std::string;
+using std::vector;
 
+using ::aidl::android::hardware::security::keymint::HardwareAuthToken;
 using ::android::trusty::confirmationui::TrustyApp;
 
-class TrustyConfirmationUI : public IConfirmationUI {
+class TrustyConfirmationUI : public BnConfirmationUI {
   public:
     TrustyConfirmationUI();
     virtual ~TrustyConfirmationUI();
-    // Methods from ::android::hardware::confirmationui::V1_0::IConfirmationUI
+    // Methods from ::aidl::android::hardware::confirmationui::IConfirmationUI
     // follow.
-    Return<ResponseCode> promptUserConfirmation(const sp<IConfirmationResultCallback>& resultCB,
-                                                const hidl_string& promptText,
-                                                const hidl_vec<uint8_t>& extraData,
-                                                const hidl_string& locale,
-                                                const hidl_vec<UIOption>& uiOptions) override;
-    Return<ResponseCode> deliverSecureInputEvent(
-        const ::android::hardware::keymaster::V4_0::HardwareAuthToken& secureInputToken) override;
-    Return<void> abort() override;
+    ::ndk::ScopedAStatus
+    promptUserConfirmation(const shared_ptr<IConfirmationResultCallback>& resultCB,
+                           const vector<uint8_t>& promptText, const vector<uint8_t>& extraData,
+                           const string& locale, const vector<UIOption>& uiOptions) override;
+    ::ndk::ScopedAStatus
+    deliverSecureInputEvent(const HardwareAuthToken& secureInputToken) override;
+
+    ::ndk::ScopedAStatus abort() override;
 
   private:
     std::weak_ptr<TrustyApp> app_;
@@ -85,7 +81,7 @@
     bool abort_called_;
     std::mutex listener_state_lock_;
     std::condition_variable listener_state_condv_;
-    ResponseCode prompt_result_;
+    int prompt_result_;
     bool secureInputDelivered_;
 
     std::tuple<teeui::ResponseCode, teeui::MsgVector<uint8_t>, teeui::MsgVector<uint8_t>>
@@ -95,10 +91,6 @@
                             const teeui::MsgVector<teeui::UIOption>& uiOptions);
 };
 
-}  // namespace implementation
-}  // namespace V1_0
-}  // namespace confirmationui
-}  // namespace hardware
-}  // namespace android
+}  // namespace aidl::android::hardware::confirmationui
 
 #endif  // ANDROID_HARDWARE_CONFIRMATIONUI_V1_0_TRUSTY_CONFIRMATIONUI_H
diff --git a/trusty/confirmationui/android.hardware.confirmationui-service.trusty.rc b/trusty/confirmationui/android.hardware.confirmationui-service.trusty.rc
new file mode 100644
index 0000000..b5c3159
--- /dev/null
+++ b/trusty/confirmationui/android.hardware.confirmationui-service.trusty.rc
@@ -0,0 +1,5 @@
+service vendor.confirmationui_default /vendor/bin/hw/android.hardware.confirmationui-service.trusty
+    interface aidl android.hardware.confirmationui.IConfirmationUI/default
+    class hal
+    user system
+    group drmrpc input system
diff --git a/trusty/confirmationui/android.hardware.confirmationui@1.0-service.trusty.xml b/trusty/confirmationui/android.hardware.confirmationui-service.trusty.xml
similarity index 71%
rename from trusty/confirmationui/android.hardware.confirmationui@1.0-service.trusty.xml
rename to trusty/confirmationui/android.hardware.confirmationui-service.trusty.xml
index 9008b87..afa2e8e 100644
--- a/trusty/confirmationui/android.hardware.confirmationui@1.0-service.trusty.xml
+++ b/trusty/confirmationui/android.hardware.confirmationui-service.trusty.xml
@@ -1,8 +1,7 @@
 <manifest version="1.0" type="device">
-    <hal format="hidl">
+    <hal format="aidl">
         <name>android.hardware.confirmationui</name>
-        <transport>hwbinder</transport>
-        <version>1.0</version>
+        <version>1</version>
         <interface>
         <name>IConfirmationUI</name>
             <instance>default</instance>
diff --git a/trusty/confirmationui/android.hardware.confirmationui@1.0-service.trusty.rc b/trusty/confirmationui/android.hardware.confirmationui@1.0-service.trusty.rc
deleted file mode 100644
index 3ba6fc0..0000000
--- a/trusty/confirmationui/android.hardware.confirmationui@1.0-service.trusty.rc
+++ /dev/null
@@ -1,4 +0,0 @@
-service confirmationui-1-0 /vendor/bin/hw/android.hardware.confirmationui@1.0-service.trusty
-    class hal
-    user system
-    group drmrpc input system
diff --git a/trusty/confirmationui/fuzzer.cpp b/trusty/confirmationui/fuzzer.cpp
new file mode 100644
index 0000000..4446b79
--- /dev/null
+++ b/trusty/confirmationui/fuzzer.cpp
@@ -0,0 +1,31 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#include <TrustyConfirmationuiHal.h>
+#include <android-base/logging.h>
+#include <fuzzbinder/libbinder_ndk_driver.h>
+#include <fuzzer/FuzzedDataProvider.h>
+
+using aidl::android::hardware::confirmationui::createTrustyConfirmationUI;
+using aidl::android::hardware::confirmationui::IConfirmationUI;
+using android::fuzzService;
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+    auto confirmationui = createTrustyConfirmationUI();
+
+    fuzzService(confirmationui->asBinder().get(), FuzzedDataProvider(data, size));
+
+    return 0;
+}
diff --git a/trusty/confirmationui/include/TrustyConfirmationuiHal.h b/trusty/confirmationui/include/TrustyConfirmationuiHal.h
index 2ab9389..8000ee2 100644
--- a/trusty/confirmationui/include/TrustyConfirmationuiHal.h
+++ b/trusty/confirmationui/include/TrustyConfirmationuiHal.h
@@ -16,18 +16,10 @@
 
 #pragma once
 
-#include <android/hardware/confirmationui/1.0/IConfirmationUI.h>
+#include <aidl/android/hardware/confirmationui/IConfirmationUI.h>
 
-namespace android {
-namespace hardware {
-namespace confirmationui {
-namespace V1_0 {
-namespace implementation {
+namespace aidl::android::hardware::confirmationui {
 
-android::sp<IConfirmationUI> createTrustyConfirmationUI();
+std::shared_ptr<IConfirmationUI> createTrustyConfirmationUI();
 
-}  // namespace implementation
-}  // namespace V1_0
-}  // namespace confirmationui
-}  // namespace hardware
-}  // namespace android
+}  // namespace aidl::android::hardware::confirmationui
diff --git a/trusty/confirmationui/service.cpp b/trusty/confirmationui/service.cpp
index dd7e84b..44fa3a6 100644
--- a/trusty/confirmationui/service.cpp
+++ b/trusty/confirmationui/service.cpp
@@ -15,21 +15,24 @@
  */
 
 #include <android-base/logging.h>
-#include <hidl/HidlTransportSupport.h>
+#include <android/binder_manager.h>
+#include <android/binder_process.h>
 
 #include <TrustyConfirmationuiHal.h>
 
-using android::sp;
-using android::hardware::confirmationui::V1_0::implementation::createTrustyConfirmationUI;
+using ::aidl::android::hardware::confirmationui::createTrustyConfirmationUI;
+using ::aidl::android::hardware::confirmationui::IConfirmationUI;
 
 int main() {
-    ::android::hardware::configureRpcThreadpool(1, true /*willJoinThreadpool*/);
-    auto service = createTrustyConfirmationUI();
-    auto status = service->registerAsService();
-    if (status != android::OK) {
-        LOG(FATAL) << "Could not register service for ConfirmationUI 1.0 (" << status << ")";
-        return -1;
-    }
-    ::android::hardware::joinRpcThreadpool();
-    return -1;
+    ABinderProcess_setThreadPoolMaxThreadCount(0);
+
+    auto confirmationui = createTrustyConfirmationUI();
+
+    const auto instance = std::string(IConfirmationUI::descriptor) + "/default";
+    binder_status_t status =
+        AServiceManager_addService(confirmationui->asBinder().get(), instance.c_str());
+    CHECK_EQ(status, STATUS_OK) << "Could not register " << instance;
+
+    ABinderProcess_joinThreadPool();
+    return EXIT_FAILURE;
 }
diff --git a/trusty/gatekeeper/TEST_MAPPING b/trusty/gatekeeper/TEST_MAPPING
new file mode 100644
index 0000000..da6c769
--- /dev/null
+++ b/trusty/gatekeeper/TEST_MAPPING
@@ -0,0 +1,7 @@
+{
+  "presubmit": [
+      {
+        "name": "VtsHalGatekeeperTargetTest"
+      }
+  ]
+}
diff --git a/trusty/keymaster/Android.bp b/trusty/keymaster/Android.bp
index adc9fdf..31f0a72 100644
--- a/trusty/keymaster/Android.bp
+++ b/trusty/keymaster/Android.bp
@@ -109,6 +109,7 @@
         "keymint_use_latest_hal_aidl_ndk_shared",
     ],
     shared_libs: [
+        "android.hardware.security.rkp-V3-ndk",
         "android.hardware.security.secureclock-V1-ndk",
         "android.hardware.security.sharedsecret-V1-ndk",
         "lib_android_keymaster_keymint_utils",
diff --git a/trusty/keymaster/TEST_MAPPING b/trusty/keymaster/TEST_MAPPING
new file mode 100644
index 0000000..ae48327
--- /dev/null
+++ b/trusty/keymaster/TEST_MAPPING
@@ -0,0 +1,13 @@
+{
+  "presubmit": [
+      {
+        "name": "RemoteProvisionerUnitTests"
+      },
+      {
+        "name": "VtsAidlKeyMintTargetTest"
+      },
+      {
+        "name": "VtsHalRemotelyProvisionedComponentTargetTest"
+      }
+  ]
+}
diff --git a/trusty/keymaster/TrustyKeymaster.cpp b/trusty/keymaster/TrustyKeymaster.cpp
index e77940a..ac98695 100644
--- a/trusty/keymaster/TrustyKeymaster.cpp
+++ b/trusty/keymaster/TrustyKeymaster.cpp
@@ -178,6 +178,11 @@
     ForwardCommand(KM_GENERATE_CSR, request, response);
 }
 
+void TrustyKeymaster::GenerateCsrV2(const GenerateCsrV2Request& request,
+                                    GenerateCsrV2Response* response) {
+    ForwardCommand(KM_GENERATE_CSR_V2, request, response);
+}
+
 void TrustyKeymaster::GetKeyCharacteristics(const GetKeyCharacteristicsRequest& request,
                                             GetKeyCharacteristicsResponse* response) {
     ForwardCommand(KM_GET_KEY_CHARACTERISTICS, request, response);
@@ -285,4 +290,10 @@
     return response;
 }
 
+GetHwInfoResponse TrustyKeymaster::GetHwInfo() {
+    GetHwInfoResponse response(message_version());
+    ForwardCommand(KM_GET_HW_INFO, GetHwInfoRequest(message_version()), &response);
+    return response;
+}
+
 }  // namespace keymaster
diff --git a/trusty/keymaster/include/trusty_keymaster/TrustyKeymaster.h b/trusty/keymaster/include/trusty_keymaster/TrustyKeymaster.h
index 9f4f39b..60d3f87 100644
--- a/trusty/keymaster/include/trusty_keymaster/TrustyKeymaster.h
+++ b/trusty/keymaster/include/trusty_keymaster/TrustyKeymaster.h
@@ -44,6 +44,7 @@
     void GenerateKey(const GenerateKeyRequest& request, GenerateKeyResponse* response);
     void GenerateRkpKey(const GenerateRkpKeyRequest& request, GenerateRkpKeyResponse* response);
     void GenerateCsr(const GenerateCsrRequest& request, GenerateCsrResponse* response);
+    void GenerateCsrV2(const GenerateCsrV2Request& request, GenerateCsrV2Response* response);
     void GetKeyCharacteristics(const GetKeyCharacteristicsRequest& request,
                                GetKeyCharacteristicsResponse* response);
     void ImportKey(const ImportKeyRequest& request, ImportKeyResponse* response);
@@ -67,6 +68,7 @@
     ConfigureVendorPatchlevelResponse ConfigureVendorPatchlevel(
             const ConfigureVendorPatchlevelRequest& request);
     GetRootOfTrustResponse GetRootOfTrust(const GetRootOfTrustRequest& request);
+    GetHwInfoResponse GetHwInfo();
 
     uint32_t message_version() const { return message_version_; }
 
diff --git a/trusty/keymaster/include/trusty_keymaster/TrustyRemotelyProvisionedComponentDevice.h b/trusty/keymaster/include/trusty_keymaster/TrustyRemotelyProvisionedComponentDevice.h
index d544b51..dbb7fff 100644
--- a/trusty/keymaster/include/trusty_keymaster/TrustyRemotelyProvisionedComponentDevice.h
+++ b/trusty/keymaster/include/trusty_keymaster/TrustyRemotelyProvisionedComponentDevice.h
@@ -46,6 +46,10 @@
                                              DeviceInfo* deviceInfo, ProtectedData* protectedData,
                                              std::vector<uint8_t>* keysToSignMac) override;
 
+    ScopedAStatus generateCertificateRequestV2(const std::vector<MacedPublicKey>& keysToSign,
+                                               const std::vector<uint8_t>& challenge,
+                                               std::vector<uint8_t>* csr) override;
+
   private:
     std::shared_ptr<::keymaster::TrustyKeymaster> impl_;
 };
diff --git a/trusty/keymaster/include/trusty_keymaster/ipc/keymaster_ipc.h b/trusty/keymaster/include/trusty_keymaster/ipc/keymaster_ipc.h
index bf0cb70..f767d40 100644
--- a/trusty/keymaster/include/trusty_keymaster/ipc/keymaster_ipc.h
+++ b/trusty/keymaster/include/trusty_keymaster/ipc/keymaster_ipc.h
@@ -60,6 +60,8 @@
     KM_GENERATE_CSR                 = (32 << KEYMASTER_REQ_SHIFT),
     KM_CONFIGURE_VENDOR_PATCHLEVEL  = (33 << KEYMASTER_REQ_SHIFT),
     KM_GET_ROOT_OF_TRUST            = (34 << KEYMASTER_REQ_SHIFT),
+    KM_GET_HW_INFO                  = (35 << KEYMASTER_REQ_SHIFT),
+    KM_GENERATE_CSR_V2              = (36 << KEYMASTER_REQ_SHIFT),
 
     // Bootloader/provisioning calls.
     KM_SET_BOOT_PARAMS = (0x1000 << KEYMASTER_REQ_SHIFT),
diff --git a/trusty/keymaster/keymint/TrustyKeyMintDevice.cpp b/trusty/keymaster/keymint/TrustyKeyMintDevice.cpp
index 7d58162..b696ff9 100644
--- a/trusty/keymaster/keymint/TrustyKeyMintDevice.cpp
+++ b/trusty/keymaster/keymint/TrustyKeyMintDevice.cpp
@@ -91,7 +91,7 @@
 }  // namespace
 
 ScopedAStatus TrustyKeyMintDevice::getHardwareInfo(KeyMintHardwareInfo* info) {
-    info->versionNumber = 2;
+    info->versionNumber = 3;
     info->securityLevel = kSecurityLevel;
     info->keyMintName = "TrustyKeyMintDevice";
     info->keyMintAuthorName = "Google";
diff --git a/trusty/keymaster/keymint/TrustyRemotelyProvisionedComponentDevice.cpp b/trusty/keymaster/keymint/TrustyRemotelyProvisionedComponentDevice.cpp
index 099f189..710be3e 100644
--- a/trusty/keymaster/keymint/TrustyRemotelyProvisionedComponentDevice.cpp
+++ b/trusty/keymaster/keymint/TrustyRemotelyProvisionedComponentDevice.cpp
@@ -28,9 +28,14 @@
 
 using keymaster::GenerateCsrRequest;
 using keymaster::GenerateCsrResponse;
+using keymaster::GenerateCsrV2Request;
+using keymaster::GenerateCsrV2Response;
 using keymaster::GenerateRkpKeyRequest;
 using keymaster::GenerateRkpKeyResponse;
+using keymaster::GetHwInfoRequest;
+using keymaster::GetHwInfoResponse;
 using keymaster::KeymasterBlob;
+using km_utils::kmError2ScopedAStatus;
 using ::std::string;
 using ::std::unique_ptr;
 using ::std::vector;
@@ -71,10 +76,16 @@
 }  // namespace
 
 ScopedAStatus TrustyRemotelyProvisionedComponentDevice::getHardwareInfo(RpcHardwareInfo* info) {
-    info->versionNumber = 2;
-    info->rpcAuthorName = "Google";
-    info->supportedEekCurve = RpcHardwareInfo::CURVE_25519;
-    info->uniqueId = "Trusty: My password is ******";
+    GetHwInfoResponse response = impl_->GetHwInfo();
+    if (response.error != KM_ERROR_OK) {
+        return Status(-static_cast<int32_t>(response.error), "Failed to get hardware info.");
+    }
+
+    info->versionNumber = response.version;
+    info->rpcAuthorName = std::move(response.rpcAuthorName);
+    info->supportedEekCurve = response.supportedEekCurve;
+    info->uniqueId = std::move(response.uniqueId);
+    info->supportedNumKeysInCsr = response.supportedNumKeysInCsr;
     return ScopedAStatus::ok();
 }
 
@@ -118,4 +129,25 @@
     return ScopedAStatus::ok();
 }
 
+ScopedAStatus TrustyRemotelyProvisionedComponentDevice::generateCertificateRequestV2(
+        const std::vector<MacedPublicKey>& keysToSign, const std::vector<uint8_t>& challenge,
+        std::vector<uint8_t>* csr) {
+    GenerateCsrV2Request request(impl_->message_version());
+    if (!request.InitKeysToSign(keysToSign.size())) {
+        return kmError2ScopedAStatus(static_cast<keymaster_error_t>(STATUS_FAILED));
+    }
+    for (size_t i = 0; i < keysToSign.size(); i++) {
+        request.SetKeyToSign(i, keysToSign[i].macedKey.data(), keysToSign[i].macedKey.size());
+    }
+    request.SetChallenge(challenge.data(), challenge.size());
+    GenerateCsrV2Response response(impl_->message_version());
+    impl_->GenerateCsrV2(request, &response);
+
+    if (response.error != KM_ERROR_OK) {
+        return Status(-static_cast<int32_t>(response.error), "Failure in CSR v2 generation.");
+    }
+    *csr = km_utils::kmBlob2vector(response.csr);
+    return ScopedAStatus::ok();
+}
+
 }  // namespace aidl::android::hardware::security::keymint::trusty
diff --git a/trusty/keymaster/keymint/android.hardware.security.keymint-service.trusty.xml b/trusty/keymaster/keymint/android.hardware.security.keymint-service.trusty.xml
index 0b995a2..3dc9c88 100644
--- a/trusty/keymaster/keymint/android.hardware.security.keymint-service.trusty.xml
+++ b/trusty/keymaster/keymint/android.hardware.security.keymint-service.trusty.xml
@@ -1,7 +1,7 @@
 <manifest version="1.0" type="device">
     <hal format="aidl">
         <name>android.hardware.security.keymint</name>
-        <version>2</version>
+        <version>3</version>
         <fqname>IKeyMintDevice/default</fqname>
     </hal>
     <hal format="aidl">
@@ -14,7 +14,7 @@
     </hal>
     <hal format="aidl">
         <name>android.hardware.security.keymint</name>
-        <version>2</version>
+        <version>3</version>
         <fqname>IRemotelyProvisionedComponent/default</fqname>
     </hal>
 </manifest>
diff --git a/trusty/keymaster/keymint/service.cpp b/trusty/keymaster/keymint/service.cpp
index 3447b27..14549d2 100644
--- a/trusty/keymaster/keymint/service.cpp
+++ b/trusty/keymaster/keymint/service.cpp
@@ -41,7 +41,7 @@
 
 int main() {
     auto trustyKeymaster = std::make_shared<keymaster::TrustyKeymaster>();
-    int err = trustyKeymaster->Initialize(keymaster::KmVersion::KEYMINT_2);
+    int err = trustyKeymaster->Initialize(keymaster::KmVersion::KEYMINT_3);
     if (err != 0) {
         LOG(FATAL) << "Could not initialize TrustyKeymaster for KeyMint (" << err << ")";
         return -1;
diff --git a/trusty/keymint/Android.bp b/trusty/keymint/Android.bp
new file mode 100644
index 0000000..c19ebbd
--- /dev/null
+++ b/trusty/keymint/Android.bp
@@ -0,0 +1,41 @@
+//
+// Copyright (C) 2022 The Android Open-Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package {
+    default_applicable_licenses: ["Android-Apache-2.0"],
+}
+
+rust_binary {
+    name: "android.hardware.security.keymint-service.rust.trusty",
+    relative_install_path: "hw",
+    vendor: true,
+    init_rc: ["android.hardware.security.keymint-service.rust.trusty.rc"],
+    vintf_fragments: ["android.hardware.security.keymint-service.rust.trusty.xml"],
+    srcs: [
+        "src/keymint_hal_main.rs"
+    ],
+    rustlibs: [
+        "libandroid_logger",
+        "libbinder_rs",
+        "libkmr_wire",
+        "libkmr_hal",
+        "libtrusty-rs",
+        "liblibc",
+        "liblog_rust",
+    ],
+    required: [
+        "android.hardware.hardware_keystore.xml",
+    ],
+}
diff --git a/trusty/keymint/android.hardware.hardware_keystore.rust.trusty-keymint.xml b/trusty/keymint/android.hardware.hardware_keystore.rust.trusty-keymint.xml
new file mode 100644
index 0000000..cd656b2
--- /dev/null
+++ b/trusty/keymint/android.hardware.hardware_keystore.rust.trusty-keymint.xml
@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright 2021 The Android Open Source Project
+
+    Licensed under the Apache License, Version 2.0 (the "License");
+    you may not use this file except in compliance with the License.
+    You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing, software
+    distributed under the License is distributed on an "AS IS" BASIS,
+    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+    See the License for the specific language governing permissions and
+    limitations under the License.
+-->
+<permissions>
+  <feature name="android.hardware.hardware_keystore" version="300" />
+</permissions>
diff --git a/trusty/keymint/android.hardware.security.keymint-service.rust.trusty.rc b/trusty/keymint/android.hardware.security.keymint-service.rust.trusty.rc
new file mode 100644
index 0000000..e3d94c6
--- /dev/null
+++ b/trusty/keymint/android.hardware.security.keymint-service.rust.trusty.rc
@@ -0,0 +1,7 @@
+service vendor.keymint.rust-trusty /vendor/bin/hw/android.hardware.security.keymint-service.rust.trusty
+    class early_hal
+    user nobody
+    group drmrpc
+    # The keymint service is not allowed to restart.
+    # If it crashes, a device restart is required.
+    oneshot
\ No newline at end of file
diff --git a/trusty/keymint/android.hardware.security.keymint-service.rust.trusty.xml b/trusty/keymint/android.hardware.security.keymint-service.rust.trusty.xml
new file mode 100644
index 0000000..3dc9c88
--- /dev/null
+++ b/trusty/keymint/android.hardware.security.keymint-service.rust.trusty.xml
@@ -0,0 +1,20 @@
+<manifest version="1.0" type="device">
+    <hal format="aidl">
+        <name>android.hardware.security.keymint</name>
+        <version>3</version>
+        <fqname>IKeyMintDevice/default</fqname>
+    </hal>
+    <hal format="aidl">
+        <name>android.hardware.security.secureclock</name>
+        <fqname>ISecureClock/default</fqname>
+    </hal>
+    <hal format="aidl">
+        <name>android.hardware.security.sharedsecret</name>
+        <fqname>ISharedSecret/default</fqname>
+    </hal>
+    <hal format="aidl">
+        <name>android.hardware.security.keymint</name>
+        <version>3</version>
+        <fqname>IRemotelyProvisionedComponent/default</fqname>
+    </hal>
+</manifest>
diff --git a/trusty/keymint/src/keymint_hal_main.rs b/trusty/keymint/src/keymint_hal_main.rs
new file mode 100644
index 0000000..cfa859f
--- /dev/null
+++ b/trusty/keymint/src/keymint_hal_main.rs
@@ -0,0 +1,164 @@
+//
+// Copyright (C) 2022 The Android Open-Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+//! This module implements the HAL service for Keymint (Rust) in Trusty.
+use kmr_hal::{
+    extract_rsp, keymint, rpc, secureclock, send_hal_info, sharedsecret, SerializedChannel,
+};
+use log::{error, info};
+use std::{
+    ffi::CString,
+    ops::DerefMut,
+    panic,
+    sync::{Arc, Mutex},
+};
+use trusty::DEFAULT_DEVICE;
+
+const TRUSTY_KEYMINT_RUST_SERVICE_NAME: &str = "com.android.trusty.keymint";
+
+static SERVICE_INSTANCE: &str = "default";
+
+static KM_SERVICE_NAME: &str = "android.hardware.security.keymint.IKeyMintDevice";
+static RPC_SERVICE_NAME: &str = "android.hardware.security.keymint.IRemotelyProvisionedComponent";
+static SECURE_CLOCK_SERVICE_NAME: &str = "android.hardware.security.secureclock.ISecureClock";
+static SHARED_SECRET_SERVICE_NAME: &str = "android.hardware.security.sharedsecret.ISharedSecret";
+
+/// Local error type for failures in the HAL service.
+#[derive(Debug, Clone)]
+struct HalServiceError(String);
+
+#[derive(Debug)]
+struct TipcChannel(trusty::TipcChannel);
+
+impl SerializedChannel for TipcChannel {
+    const MAX_SIZE: usize = 4000;
+    fn execute(&mut self, serialized_req: &[u8]) -> binder::Result<Vec<u8>> {
+        self.0.send(serialized_req).map_err(|e| {
+            binder::Status::new_exception(
+                binder::ExceptionCode::TRANSACTION_FAILED,
+                Some(
+                    &CString::new(format!(
+                        "Failed to send the request via tipc channel because of {:?}",
+                        e
+                    ))
+                    .unwrap(),
+                ),
+            )
+        })?;
+        let mut expect_more_msgs = true;
+        let mut full_rsp = Vec::new();
+        while expect_more_msgs {
+            let mut recv_buf = Vec::new();
+            self.0.recv(&mut recv_buf).map_err(|e| {
+                binder::Status::new_exception(
+                    binder::ExceptionCode::TRANSACTION_FAILED,
+                    Some(
+                        &CString::new(format!(
+                            "Failed to receive the response via tipc channel because of {:?}",
+                            e
+                        ))
+                        .unwrap(),
+                    ),
+                )
+            })?;
+            let current_rsp_content;
+            (expect_more_msgs, current_rsp_content) = extract_rsp(&recv_buf)?;
+            full_rsp.extend_from_slice(current_rsp_content);
+        }
+        Ok(full_rsp)
+    }
+}
+
+fn main() {
+    if let Err(e) = inner_main() {
+        panic!("HAL service failed: {:?}", e);
+    }
+}
+
+fn inner_main() -> Result<(), HalServiceError> {
+    // Initialize Android logging.
+    android_logger::init_once(
+        android_logger::Config::default()
+            .with_tag("keymint-hal-trusty")
+            .with_min_level(log::Level::Info)
+            .with_log_id(android_logger::LogId::System),
+    );
+    // Redirect panic messages to logcat.
+    panic::set_hook(Box::new(|panic_info| {
+        error!("{}", panic_info);
+    }));
+
+    info!("Trusty KM HAL service is starting.");
+
+    info!("Starting thread pool now.");
+    binder::ProcessState::start_thread_pool();
+
+    // Create connection to the TA
+    let connection = trusty::TipcChannel::connect(DEFAULT_DEVICE, TRUSTY_KEYMINT_RUST_SERVICE_NAME)
+        .map_err(|e| {
+            HalServiceError(format!("Failed to connect to Trusty Keymint TA because of {:?}.", e))
+        })?;
+    let tipc_channel = Arc::new(Mutex::new(TipcChannel(connection)));
+
+    // Register the Keymint service
+    let km_service = keymint::Device::new_as_binder(tipc_channel.clone());
+    let km_service_name = format!("{}/{}", KM_SERVICE_NAME, SERVICE_INSTANCE);
+    binder::add_service(&km_service_name, km_service.as_binder()).map_err(|e| {
+        HalServiceError(format!(
+            "Failed to register service {} because of {:?}.",
+            km_service_name, e
+        ))
+    })?;
+
+    // Register the Remotely Provisioned Component service
+    let rpc_service = rpc::Device::new_as_binder(tipc_channel.clone());
+    let rpc_service_name = format!("{}/{}", RPC_SERVICE_NAME, SERVICE_INSTANCE);
+    binder::add_service(&rpc_service_name, rpc_service.as_binder()).map_err(|e| {
+        HalServiceError(format!(
+            "Failed to register service {} because of {:?}.",
+            rpc_service_name, e
+        ))
+    })?;
+
+    // Register the Secure Clock service
+    let sclock_service = secureclock::Device::new_as_binder(tipc_channel.clone());
+    let sclock_service_name = format!("{}/{}", SECURE_CLOCK_SERVICE_NAME, SERVICE_INSTANCE);
+    binder::add_service(&sclock_service_name, sclock_service.as_binder()).map_err(|e| {
+        HalServiceError(format!(
+            "Failed to register service {} because of {:?}.",
+            sclock_service_name, e
+        ))
+    })?;
+
+    // Register the Shared Secret service
+    let ssecret_service = sharedsecret::Device::new_as_binder(tipc_channel.clone());
+    let ssecret_service_name = format!("{}/{}", SHARED_SECRET_SERVICE_NAME, SERVICE_INSTANCE);
+    binder::add_service(&ssecret_service_name, ssecret_service.as_binder()).map_err(|e| {
+        HalServiceError(format!(
+            "Failed to register service {} because of {:?}.",
+            ssecret_service_name, e
+        ))
+    })?;
+
+    // Send the HAL service information to the TA
+    send_hal_info(tipc_channel.lock().unwrap().deref_mut())
+        .map_err(|e| HalServiceError(format!("Failed to populate HAL info: {:?}", e)))?;
+
+    info!("Successfully registered KeyMint HAL services.");
+    info!("Joining thread pool now.");
+    binder::ProcessState::join_thread_pool();
+    info!("KeyMint HAL service is terminating."); // should not reach here
+    Ok(())
+}
diff --git a/trusty/storage/proxy/Android.bp b/trusty/storage/proxy/Android.bp
index 94f26d8..e952ee0 100644
--- a/trusty/storage/proxy/Android.bp
+++ b/trusty/storage/proxy/Android.bp
@@ -32,11 +32,11 @@
 
     shared_libs: [
         "libbase",
+        "libcutils",
         "liblog",
         "libhardware_legacy",
     ],
     header_libs: [
-        "libcutils_headers",
         "libgsi_headers",
     ],
 
diff --git a/trusty/storage/proxy/proxy.c b/trusty/storage/proxy/proxy.c
index b970406..4f77fa2 100644
--- a/trusty/storage/proxy/proxy.c
+++ b/trusty/storage/proxy/proxy.c
@@ -136,6 +136,10 @@
             rc = storage_file_set_size(msg, req, req_len);
             break;
 
+        case STORAGE_FILE_GET_MAX_SIZE:
+            rc = storage_file_get_max_size(msg, req, req_len);
+            break;
+
         case STORAGE_RPMB_SEND:
             rc = rpmb_send(msg, req, req_len);
             break;
diff --git a/trusty/storage/proxy/rpmb.c b/trusty/storage/proxy/rpmb.c
index f059935..b1b8232 100644
--- a/trusty/storage/proxy/rpmb.c
+++ b/trusty/storage/proxy/rpmb.c
@@ -322,9 +322,9 @@
 }
 
 static int send_mmc_rpmb_req(int mmc_fd, const struct storage_rpmb_send_req* req) {
-    struct {
+    union {
         struct mmc_ioc_multi_cmd multi;
-        struct mmc_ioc_cmd cmd_buf[3];
+        uint8_t raw[sizeof(struct mmc_ioc_multi_cmd) + sizeof(struct mmc_ioc_cmd) * 3];
     } mmc = {};
     struct mmc_ioc_cmd* cmd = mmc.multi.cmds;
     int rc;
diff --git a/trusty/storage/proxy/storage.c b/trusty/storage/proxy/storage.c
index c531cfd..a96ddcb 100644
--- a/trusty/storage/proxy/storage.c
+++ b/trusty/storage/proxy/storage.c
@@ -13,10 +13,12 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+#include <cutils/properties.h>
 #include <errno.h>
 #include <fcntl.h>
 #include <inttypes.h>
 #include <libgen.h>
+#include <linux/fs.h>
 #include <stdbool.h>
 #include <stdlib.h>
 #include <string.h>
@@ -35,6 +37,9 @@
 
 #define ALTERNATE_DATA_DIR "alternate/"
 
+/* Maximum file size for filesystem backed storage (i.e. not block dev backed storage) */
+#define MAX_FILE_SIZE (0x10000000000)
+
 enum sync_state {
     SS_UNUSED = -1,
     SS_CLEAN =  0,
@@ -43,6 +48,22 @@
 
 static const char *ssdir_name;
 
+/*
+ * Property set to 1 after we have opened a file under ssdir_name. The backing
+ * files for both TD and TDP are currently located under /data/vendor/ss and can
+ * only be opened once userdata is mounted. This storageproxyd service is
+ * restarted when userdata is available, which causes the Trusty storage service
+ * to reconnect and attempt to open the backing files for TD and TDP. Once we
+ * set this property, other users can expect that the Trusty storage service
+ * ports will be available (although they may block if still being initialized),
+ * and connections will not be reset after this point (assuming the
+ * storageproxyd service stays running).
+ */
+#define FS_READY_PROPERTY "ro.vendor.trusty.storage.fs_ready"
+
+/* has FS_READY_PROPERTY been set? */
+static bool fs_ready_initialized = false;
+
 static enum sync_state fs_state;
 static enum sync_state fd_state[FD_TBL_SIZE];
 
@@ -336,6 +357,16 @@
     ALOGV("%s: \"%s\": fd = %u: handle = %d\n",
           __func__, path, rc, resp.handle);
 
+    /* a backing file has been opened, notify any waiting init steps */
+    if (!fs_ready_initialized) {
+        rc = property_set(FS_READY_PROPERTY, "1");
+        if (rc == 0) {
+            fs_ready_initialized = true;
+        } else {
+            ALOGE("Could not set property %s, rc: %d\n", FS_READY_PROPERTY, rc);
+        }
+    }
+
     return ipc_respond(msg, &resp, sizeof(resp));
 
 err_response:
@@ -522,6 +553,45 @@
     return ipc_respond(msg, NULL, 0);
 }
 
+int storage_file_get_max_size(struct storage_msg* msg, const void* r, size_t req_len) {
+    const struct storage_file_get_max_size_req* req = r;
+    struct storage_file_get_max_size_resp resp = {0};
+    uint64_t max_size = 0;
+
+    if (req_len != sizeof(*req)) {
+        ALOGE("%s: invalid request length (%zd != %zd)\n", __func__, req_len, sizeof(*req));
+        msg->result = STORAGE_ERR_NOT_VALID;
+        goto err_response;
+    }
+
+    struct stat stat;
+    int fd = lookup_fd(req->handle, false);
+    int rc = fstat(fd, &stat);
+    if (rc < 0) {
+        ALOGE("%s: error stat'ing file (fd=%d): %s\n", __func__, fd, strerror(errno));
+        goto err_response;
+    }
+
+    if ((stat.st_mode & S_IFMT) == S_IFBLK) {
+        rc = ioctl(fd, BLKGETSIZE64, &max_size);
+        if (rc < 0) {
+            rc = errno;
+            ALOGE("%s: error calling ioctl on file (fd=%d): %s\n", __func__, fd, strerror(errno));
+            msg->result = translate_errno(rc);
+            goto err_response;
+        }
+    } else {
+        max_size = MAX_FILE_SIZE;
+    }
+
+    resp.max_size = max_size;
+    msg->result = STORAGE_NO_ERROR;
+    return ipc_respond(msg, &resp, sizeof(resp));
+
+err_response:
+    return ipc_respond(msg, NULL, 0);
+}
+
 int storage_init(const char *dirname)
 {
     /* If there is an active DSU image, use the alternate fs mode. */
diff --git a/trusty/storage/proxy/storage.h b/trusty/storage/proxy/storage.h
index 5a670d4..77bfa13 100644
--- a/trusty/storage/proxy/storage.h
+++ b/trusty/storage/proxy/storage.h
@@ -39,6 +39,8 @@
 int storage_file_set_size(struct storage_msg *msg,
                           const void *req, size_t req_len);
 
+int storage_file_get_max_size(struct storage_msg* msg, const void* req, size_t req_len);
+
 int storage_init(const char *dirname);
 
 int storage_sync_checkpoint(void);
diff --git a/trusty/test/binder/aidl/ByteEnum.aidl b/trusty/test/binder/aidl/com/android/trusty/binder/test/ByteEnum.aidl
similarity index 94%
rename from trusty/test/binder/aidl/ByteEnum.aidl
rename to trusty/test/binder/aidl/com/android/trusty/binder/test/ByteEnum.aidl
index d3a13ac..9c712c0 100644
--- a/trusty/test/binder/aidl/ByteEnum.aidl
+++ b/trusty/test/binder/aidl/com/android/trusty/binder/test/ByteEnum.aidl
@@ -14,6 +14,8 @@
  * limitations under the License.
  */
 
+package com.android.trusty.binder.test;
+
 /*
  * Hello, world!
  */
diff --git a/trusty/test/binder/aidl/ITestService.aidl b/trusty/test/binder/aidl/com/android/trusty/binder/test/ITestService.aidl
similarity index 93%
rename from trusty/test/binder/aidl/ITestService.aidl
rename to trusty/test/binder/aidl/com/android/trusty/binder/test/ITestService.aidl
index c6a99c8..cfbb246 100644
--- a/trusty/test/binder/aidl/ITestService.aidl
+++ b/trusty/test/binder/aidl/com/android/trusty/binder/test/ITestService.aidl
@@ -14,10 +14,11 @@
  * limitations under the License.
  */
 
+package com.android.trusty.binder.test;
 
-import ByteEnum;
-import IntEnum;
-import LongEnum;
+import com.android.trusty.binder.test.ByteEnum;
+import com.android.trusty.binder.test.IntEnum;
+import com.android.trusty.binder.test.LongEnum;
 
 interface ITestService {
     const @utf8InCpp String PORT = "com.android.trusty.binder.test.service";
diff --git a/trusty/test/binder/aidl/IntEnum.aidl b/trusty/test/binder/aidl/com/android/trusty/binder/test/IntEnum.aidl
similarity index 94%
rename from trusty/test/binder/aidl/IntEnum.aidl
rename to trusty/test/binder/aidl/com/android/trusty/binder/test/IntEnum.aidl
index 120e44f..4055b25 100644
--- a/trusty/test/binder/aidl/IntEnum.aidl
+++ b/trusty/test/binder/aidl/com/android/trusty/binder/test/IntEnum.aidl
@@ -14,6 +14,8 @@
  * limitations under the License.
  */
 
+package com.android.trusty.binder.test;
+
 @JavaDerive(toString=true)
 @Backing(type="int")
 enum IntEnum {
diff --git a/trusty/test/binder/aidl/LongEnum.aidl b/trusty/test/binder/aidl/com/android/trusty/binder/test/LongEnum.aidl
similarity index 94%
rename from trusty/test/binder/aidl/LongEnum.aidl
rename to trusty/test/binder/aidl/com/android/trusty/binder/test/LongEnum.aidl
index 0e9e933..20c64af 100644
--- a/trusty/test/binder/aidl/LongEnum.aidl
+++ b/trusty/test/binder/aidl/com/android/trusty/binder/test/LongEnum.aidl
@@ -14,6 +14,8 @@
  * limitations under the License.
  */
 
+package com.android.trusty.binder.test;
+
 @Backing(type="long")
 enum LongEnum {
     FOO = 100000000000,
diff --git a/trusty/test/binder/aidl/rules.mk b/trusty/test/binder/aidl/rules.mk
index 6154abb..546a370 100644
--- a/trusty/test/binder/aidl/rules.mk
+++ b/trusty/test/binder/aidl/rules.mk
@@ -17,10 +17,12 @@
 
 MODULE := $(LOCAL_DIR)
 
+MODULE_AIDL_PACKAGE := com/android/trusty/binder/test
+
 MODULE_AIDLS := \
-	$(LOCAL_DIR)/ByteEnum.aidl \
-	$(LOCAL_DIR)/IntEnum.aidl \
-	$(LOCAL_DIR)/ITestService.aidl \
-	$(LOCAL_DIR)/LongEnum.aidl \
+	$(LOCAL_DIR)/$(MODULE_AIDL_PACKAGE)/ByteEnum.aidl \
+	$(LOCAL_DIR)/$(MODULE_AIDL_PACKAGE)/IntEnum.aidl \
+	$(LOCAL_DIR)/$(MODULE_AIDL_PACKAGE)/ITestService.aidl \
+	$(LOCAL_DIR)/$(MODULE_AIDL_PACKAGE)/LongEnum.aidl \
 
 include make/aidl.mk
diff --git a/trusty/trusty-base.mk b/trusty/trusty-base.mk
index 0609709..7b4aa26 100644
--- a/trusty/trusty-base.mk
+++ b/trusty/trusty-base.mk
@@ -22,8 +22,21 @@
 # For gatekeeper, we include the generic -service and -impl to use legacy
 # HAL loading of gatekeeper.trusty.
 
+# Allow the KeyMint HAL service implementation to be selected at build time.  This needs to be
+# done in sync with the TA implementation included in Trusty.  Possible values are:
+#
+# - Rust implementation:   export TRUSTY_KEYMINT_IMPL=rust
+# - C++ implementation:    (any other value of TRUSTY_KEYMINT_IMPL)
+
+ifeq ($(TRUSTY_KEYMINT_IMPL),rust)
+    LOCAL_KEYMINT_PRODUCT_PACKAGE := android.hardware.security.keymint-service.rust.trusty
+else
+    # Default to the C++ implementation
+    LOCAL_KEYMINT_PRODUCT_PACKAGE := android.hardware.security.keymint-service.trusty
+endif
+
 PRODUCT_PACKAGES += \
-	android.hardware.security.keymint-service.trusty \
+	$(LOCAL_KEYMINT_PRODUCT_PACKAGE) \
 	android.hardware.gatekeeper@1.0-service.trusty \
 	trusty_apploader \
 	RemoteProvisioner