diff --git a/adb/Android.mk b/adb/Android.mk
index fab8c87..49e492c 100644
--- a/adb/Android.mk
+++ b/adb/Android.mk
@@ -336,7 +336,7 @@
     libfec_rs \
     libselinux \
     liblog \
-    libext4_utils_static \
+    libext4_utils \
     libsquashfs_utils \
     libcutils \
     libbase \
diff --git a/adf/libadfhwc/adfhwc.cpp b/adf/libadfhwc/adfhwc.cpp
index 7d5b555..a97862a 100644
--- a/adf/libadfhwc/adfhwc.cpp
+++ b/adf/libadfhwc/adfhwc.cpp
@@ -20,7 +20,7 @@
 #include <pthread.h>
 #include <sys/resource.h>
 
-#include <android/log.h>
+#include <log/log.h>
 #include <utils/Vector.h>
 
 #include <adf/adf.h>
diff --git a/debuggerd/arm/machine.cpp b/debuggerd/arm/machine.cpp
index 292edcb..78c2306 100644
--- a/debuggerd/arm/machine.cpp
+++ b/debuggerd/arm/machine.cpp
@@ -22,8 +22,8 @@
 #include <string.h>
 #include <sys/ptrace.h>
 
-#include <android/log.h>
 #include <backtrace/Backtrace.h>
+#include <log/log.h>
 
 #include "machine.h"
 #include "utility.h"
diff --git a/debuggerd/arm64/machine.cpp b/debuggerd/arm64/machine.cpp
index cd1bd52..e7bf79a 100644
--- a/debuggerd/arm64/machine.cpp
+++ b/debuggerd/arm64/machine.cpp
@@ -24,8 +24,8 @@
 #include <sys/ptrace.h>
 #include <sys/uio.h>
 
-#include <android/log.h>
 #include <backtrace/Backtrace.h>
+#include <log/log.h>
 
 #include "machine.h"
 #include "utility.h"
diff --git a/debuggerd/backtrace.cpp b/debuggerd/backtrace.cpp
index 06c1efe..0664442 100644
--- a/debuggerd/backtrace.cpp
+++ b/debuggerd/backtrace.cpp
@@ -31,8 +31,8 @@
 #include <memory>
 #include <string>
 
-#include <android/log.h>
 #include <backtrace/Backtrace.h>
+#include <log/log.h>
 
 #include "backtrace.h"
 
diff --git a/debuggerd/debuggerd.cpp b/debuggerd/debuggerd.cpp
index 9b82f64..893adc8 100644
--- a/debuggerd/debuggerd.cpp
+++ b/debuggerd/debuggerd.cpp
@@ -42,12 +42,12 @@
 
 #include <selinux/android.h>
 
-#include <android/log.h>
 #include <android-base/file.h>
 #include <android-base/unique_fd.h>
 #include <cutils/debugger.h>
 #include <cutils/properties.h>
 #include <cutils/sockets.h>
+#include <log/log.h>
 
 #include <private/android_filesystem_config.h>
 
diff --git a/debuggerd/elf_utils.cpp b/debuggerd/elf_utils.cpp
index d760a37..4e798e2 100644
--- a/debuggerd/elf_utils.cpp
+++ b/debuggerd/elf_utils.cpp
@@ -23,9 +23,9 @@
 
 #include <string>
 
-#include <android/log.h>
 #include <android-base/stringprintf.h>
 #include <backtrace/Backtrace.h>
+#include <log/log.h>
 
 #include "elf_utils.h"
 
diff --git a/debuggerd/mips/machine.cpp b/debuggerd/mips/machine.cpp
index 99a9d65..cbf272a 100644
--- a/debuggerd/mips/machine.cpp
+++ b/debuggerd/mips/machine.cpp
@@ -22,8 +22,8 @@
 #include <string.h>
 #include <sys/ptrace.h>
 
-#include <android/log.h>
 #include <backtrace/Backtrace.h>
+#include <log/log.h>
 
 #include "machine.h"
 #include "utility.h"
diff --git a/debuggerd/mips64/machine.cpp b/debuggerd/mips64/machine.cpp
index ecd1ca2..0a8d532 100644
--- a/debuggerd/mips64/machine.cpp
+++ b/debuggerd/mips64/machine.cpp
@@ -22,8 +22,8 @@
 #include <string.h>
 #include <sys/ptrace.h>
 
-#include <android/log.h>
 #include <backtrace/Backtrace.h>
+#include <log/log.h>
 
 #include "machine.h"
 #include "utility.h"
diff --git a/debuggerd/open_files_list.cpp b/debuggerd/open_files_list.cpp
index 5ef2abc..5c7ea70 100644
--- a/debuggerd/open_files_list.cpp
+++ b/debuggerd/open_files_list.cpp
@@ -29,7 +29,7 @@
 #include <vector>
 
 #include <android-base/file.h>
-#include <android/log.h>
+#include <log/log.h>
 
 #include "open_files_list.h"
 
diff --git a/debuggerd/signal_sender.cpp b/debuggerd/signal_sender.cpp
index 7fe4dee..42a8e77 100644
--- a/debuggerd/signal_sender.cpp
+++ b/debuggerd/signal_sender.cpp
@@ -27,7 +27,7 @@
 #include <sys/wait.h>
 #include <unistd.h>
 
-#include <android/log.h>
+#include <log/log.h>
 
 #include "signal_sender.h"
 
diff --git a/debuggerd/x86/machine.cpp b/debuggerd/x86/machine.cpp
index a6f21e1..af10817 100644
--- a/debuggerd/x86/machine.cpp
+++ b/debuggerd/x86/machine.cpp
@@ -21,8 +21,8 @@
 #include <string.h>
 #include <sys/ptrace.h>
 
-#include <android/log.h>
 #include <backtrace/Backtrace.h>
+#include <log/log.h>
 
 #include "machine.h"
 #include "utility.h"
diff --git a/debuggerd/x86_64/machine.cpp b/debuggerd/x86_64/machine.cpp
index 705e12d..bf2c2b4 100644
--- a/debuggerd/x86_64/machine.cpp
+++ b/debuggerd/x86_64/machine.cpp
@@ -18,12 +18,12 @@
 
 #include <errno.h>
 #include <stdint.h>
-#include <sys/ptrace.h>
 #include <string.h>
+#include <sys/ptrace.h>
 #include <sys/user.h>
 
-#include <android/log.h>
 #include <backtrace/Backtrace.h>
+#include <log/log.h>
 
 #include "machine.h"
 #include "utility.h"
diff --git a/fastboot/Android.mk b/fastboot/Android.mk
index 286de5b..5610cc0 100644
--- a/fastboot/Android.mk
+++ b/fastboot/Android.mk
@@ -57,8 +57,8 @@
 
 LOCAL_STATIC_LIBRARIES := \
     libziparchive \
-    libext4_utils_host \
-    libsparse_host \
+    libext4_utils \
+    libsparse \
     libutils \
     liblog \
     libz \
diff --git a/fingerprintd/fingerprintd.cpp b/fingerprintd/fingerprintd.cpp
index 05109b7..2fc2d0a 100644
--- a/fingerprintd/fingerprintd.cpp
+++ b/fingerprintd/fingerprintd.cpp
@@ -16,7 +16,6 @@
 
 #define LOG_TAG "fingerprintd"
 
-#include <android/log.h>
 #include <binder/IPCThreadState.h>
 #include <binder/IServiceManager.h>
 #include <binder/PermissionCache.h>
@@ -25,6 +24,7 @@
 #include <hardware/hw_auth_token.h>
 #include <keystore/IKeystoreService.h>
 #include <keystore/keystore.h> // for error codes
+#include <log/log.h>
 #include <utils/Log.h>
 #include <utils/String16.h>
 
diff --git a/fs_mgr/Android.mk b/fs_mgr/Android.mk
index 8997cab..9e06bc5 100644
--- a/fs_mgr/Android.mk
+++ b/fs_mgr/Android.mk
@@ -9,7 +9,7 @@
     libbase \
     libcrypto_utils \
     libcrypto \
-    libext4_utils_static \
+    libext4_utils \
     libsquashfs_utils \
     libselinux
 
@@ -57,7 +57,7 @@
     libcutils \
     liblog \
     libc \
-    libsparse_static \
+    libsparse \
     libz \
     libselinux
 LOCAL_CXX_STL := libc++_static
diff --git a/fs_mgr/fs_mgr_verity.cpp b/fs_mgr/fs_mgr_verity.cpp
index 30c9731..d43c756 100644
--- a/fs_mgr/fs_mgr_verity.cpp
+++ b/fs_mgr/fs_mgr_verity.cpp
@@ -31,6 +31,7 @@
 
 #include <android-base/file.h>
 #include <android-base/strings.h>
+#include <android-base/unique_fd.h>
 #include <crypto_utils/android_pubkey.h>
 #include <cutils/properties.h>
 #include <logwrap/logwrap.h>
@@ -73,6 +74,8 @@
 #define VERITY_KMSG_RESTART "dm-verity device corrupted"
 #define VERITY_KMSG_BUFSIZE 1024
 
+#define READ_BUF_SIZE 4096
+
 #define __STRINGIFY(x) #x
 #define STRINGIFY(x) __STRINGIFY(x)
 
@@ -205,6 +208,16 @@
     return 0;
 }
 
+static int destroy_verity_device(struct dm_ioctl *io, char *name, int fd)
+{
+    verity_ioctl_init(io, name, 0);
+    if (ioctl(fd, DM_DEV_REMOVE, io)) {
+        ERROR("Error removing device mapping (%s)", strerror(errno));
+        return -1;
+    }
+    return 0;
+}
+
 static int get_verity_device_name(struct dm_ioctl *io, char *name, int fd, char **dev_name)
 {
     verity_ioctl_init(io, name, 0);
@@ -606,6 +619,30 @@
     return rc;
 }
 
+static int read_partition(const char *path, uint64_t size)
+{
+    char buf[READ_BUF_SIZE];
+    ssize_t size_read;
+    android::base::unique_fd fd(TEMP_FAILURE_RETRY(open(path, O_RDONLY | O_CLOEXEC)));
+
+    if (fd == -1) {
+        ERROR("Failed to open %s: %s\n", path, strerror(errno));
+        return -errno;
+    }
+
+    while (size) {
+        size_read = TEMP_FAILURE_RETRY(read(fd, buf, READ_BUF_SIZE));
+        if (size_read == -1) {
+            ERROR("Error in reading partition %s: %s\n", path,
+                  strerror(errno));
+            return -errno;
+        }
+        size -= size_read;
+    }
+
+    return 0;
+}
+
 static int compare_last_signature(struct fstab_rec *fstab, int *match)
 {
     char tag[METADATA_TAG_MAX_LENGTH + 1];
@@ -788,7 +825,7 @@
     char fstab_filename[PROPERTY_VALUE_MAX + sizeof(FSTAB_PREFIX)];
     const char *mount_point;
     char propbuf[PROPERTY_VALUE_MAX];
-    char *status;
+    const char *status;
     int fd = -1;
     int i;
     int mode;
@@ -838,9 +875,13 @@
         verity_ioctl_init(io, mount_point, 0);
 
         if (ioctl(fd, DM_TABLE_STATUS, io)) {
-            ERROR("Failed to query DM_TABLE_STATUS for %s (%s)\n", mount_point,
-                strerror(errno));
-            continue;
+            if (fstab->recs[i].fs_mgr_flags & MF_VERIFYATBOOT) {
+                status = "V";
+            } else {
+                ERROR("Failed to query DM_TABLE_STATUS for %s (%s)\n", mount_point,
+                      strerror(errno));
+                continue;
+            }
         }
 
         status = &buffer[io->data_start + sizeof(struct dm_target_spec)];
@@ -904,6 +945,7 @@
     alignas(dm_ioctl) char buffer[DM_BUF_SIZE];
     struct dm_ioctl *io = (struct dm_ioctl *) buffer;
     char *mount_point = basename(fstab->mount_point);
+    bool verified_at_boot = false;
 
     if (fec_open(&f, fstab->blk_device, O_RDONLY, FEC_VERITY_DISABLE,
             FEC_DEFAULT_ROOTS) < 0) {
@@ -1037,10 +1079,26 @@
     // mark the underlying block device as read-only
     fs_mgr_set_blk_ro(fstab->blk_device);
 
+    // Verify the entire partition in one go
+    // If there is an error, allow it to mount as a normal verity partition.
+    if (fstab->fs_mgr_flags & MF_VERIFYATBOOT) {
+        INFO("Verifying partition %s at boot\n", fstab->blk_device);
+        int err = read_partition(verity_blk_name, verity.data_size);
+        if (!err) {
+            INFO("Verified verity partition %s at boot\n", fstab->blk_device);
+            verified_at_boot = true;
+        }
+    }
+
     // assign the new verity block device as the block device
-    free(fstab->blk_device);
-    fstab->blk_device = verity_blk_name;
-    verity_blk_name = 0;
+    if (!verified_at_boot) {
+        free(fstab->blk_device);
+        fstab->blk_device = verity_blk_name;
+        verity_blk_name = 0;
+    } else if (destroy_verity_device(io, mount_point, fd) < 0) {
+        ERROR("Failed to remove verity device %s\n", mount_point);
+        goto out;
+    }
 
     // make sure we've set everything up properly
     if (verify_dev && test_access(fstab->blk_device) < 0) {
diff --git a/gatekeeperd/gatekeeperd.cpp b/gatekeeperd/gatekeeperd.cpp
index 4107f55..d4a92e5 100644
--- a/gatekeeperd/gatekeeperd.cpp
+++ b/gatekeeperd/gatekeeperd.cpp
@@ -24,7 +24,6 @@
 #include <stdint.h>
 #include <unistd.h>
 
-#include <android/log.h>
 #include <binder/IPCThreadState.h>
 #include <binder/IServiceManager.h>
 #include <binder/PermissionCache.h>
@@ -33,6 +32,7 @@
 #include <hardware/hw_auth_token.h>
 #include <keystore/IKeystoreService.h>
 #include <keystore/keystore.h> // For error code
+#include <log/log.h>
 #include <utils/Log.h>
 #include <utils/String16.h>
 
diff --git a/init/Android.mk b/init/Android.mk
index 111fe89..6615692 100644
--- a/init/Android.mk
+++ b/init/Android.mk
@@ -92,7 +92,7 @@
     libsquashfs_utils \
     liblogwrap \
     libcutils \
-    libext4_utils_static \
+    libext4_utils \
     libbase \
     libc \
     libselinux \
@@ -101,7 +101,7 @@
     libcrypto \
     libc++_static \
     libdl \
-    libsparse_static \
+    libsparse \
     libz \
     libprocessgroup \
     libnl \
diff --git a/libbacktrace/BacktraceLog.h b/libbacktrace/BacktraceLog.h
index 0a27982..5c39f1c 100644
--- a/libbacktrace/BacktraceLog.h
+++ b/libbacktrace/BacktraceLog.h
@@ -19,7 +19,7 @@
 
 #define LOG_TAG "libbacktrace"
 
-#include <android/log.h>
+#include <log/log.h>
 
 // Macro to log the function name along with the warning message.
 #define BACK_LOGW(format, ...) \
diff --git a/libbacktrace/BacktraceMap.cpp b/libbacktrace/BacktraceMap.cpp
index 4496375..0e31495 100644
--- a/libbacktrace/BacktraceMap.cpp
+++ b/libbacktrace/BacktraceMap.cpp
@@ -22,7 +22,8 @@
 #include <sys/types.h>
 #include <unistd.h>
 
-#include <android/log.h>
+#include <log/log.h>
+
 #include <backtrace/backtrace_constants.h>
 #include <backtrace/BacktraceMap.h>
 
diff --git a/libcutils/ashmem-dev.c b/libcutils/ashmem-dev.c
index db4ed11..92717c0 100644
--- a/libcutils/ashmem-dev.c
+++ b/libcutils/ashmem-dev.c
@@ -31,8 +31,8 @@
 #include <sys/types.h>
 #include <unistd.h>
 
-#include <android/log.h>
 #include <cutils/ashmem.h>
+#include <log/log.h>
 
 #define ASHMEM_DEVICE "/dev/ashmem"
 
diff --git a/libcutils/debugger.c b/libcutils/debugger.c
index c6bdd1a..32fac98 100644
--- a/libcutils/debugger.c
+++ b/libcutils/debugger.c
@@ -25,9 +25,9 @@
 #include <sys/types.h>
 #include <unistd.h>
 
-#include <android/log.h>
 #include <cutils/debugger.h>
 #include <cutils/sockets.h>
+#include <log/log.h>
 
 static int send_request(int sock_fd, void* msg_ptr, size_t msg_len) {
   int result = 0;
diff --git a/libcutils/dlmalloc_stubs.c b/libcutils/dlmalloc_stubs.c
index 6c07bed..2cff9dd 100644
--- a/libcutils/dlmalloc_stubs.c
+++ b/libcutils/dlmalloc_stubs.c
@@ -16,7 +16,7 @@
 
 #define LOG_TAG "dlmalloc-stubs"
 
-#include "android/log.h"
+#include "log/log.h"
 
 #define UNUSED __attribute__((__unused__))
 
diff --git a/libcutils/fs.c b/libcutils/fs.c
index c49233e..488fdfc 100644
--- a/libcutils/fs.c
+++ b/libcutils/fs.c
@@ -32,8 +32,8 @@
 #include <sys/types.h>
 #include <unistd.h>
 
-#include <android/log.h>
 #include <cutils/fs.h>
+#include <log/log.h>
 
 #define ALL_PERMS (S_ISUID | S_ISGID | S_ISVTX | S_IRWXU | S_IRWXG | S_IRWXO)
 #define BUF_SIZE 64
diff --git a/libcutils/fs_config.c b/libcutils/fs_config.c
index 6155d16..f43f1e6 100644
--- a/libcutils/fs_config.c
+++ b/libcutils/fs_config.c
@@ -33,7 +33,7 @@
 #include <sys/stat.h>
 #include <sys/types.h>
 
-#include <android/log.h>
+#include <log/log.h>
 #include <private/android_filesystem_config.h>
 #include <utils/Compat.h>
 
@@ -163,6 +163,10 @@
                                            CAP_MASK_LONG(CAP_NET_RAW),
                                               "system/bin/hw/android.hardware.wifi@1.0-service" },
 
+    /* Support Bluetooth legacy hal accessing /sys/class/rfkill */
+    { 00700, AID_BLUETOOTH, AID_BLUETOOTH, CAP_MASK_LONG(CAP_NET_ADMIN),
+                                              "system/bin/hw/android.hardware.bluetooth@1.0-service" },
+
     /* A non-privileged zygote that spawns isolated processes for web rendering. */
     { 0750,  AID_ROOT,      AID_ROOT,      CAP_MASK_LONG(CAP_SETUID) |
                                            CAP_MASK_LONG(CAP_SETGID) |
diff --git a/libcutils/properties.c b/libcutils/properties.c
index 740c7a9..bdbddd0 100644
--- a/libcutils/properties.c
+++ b/libcutils/properties.c
@@ -26,9 +26,9 @@
 #include <string.h>
 #include <unistd.h>
 
-#include <android/log.h>
 #include <cutils/properties.h>
 #include <cutils/sockets.h>
+#include <log/log.h>
 
 int8_t property_get_bool(const char *key, int8_t default_value) {
     if (!key) {
diff --git a/libcutils/qtaguid.c b/libcutils/qtaguid.c
index ae5a503..22b8325 100644
--- a/libcutils/qtaguid.c
+++ b/libcutils/qtaguid.c
@@ -26,7 +26,7 @@
 #include <string.h>
 #include <unistd.h>
 
-#include <android/log.h>
+#include <log/log.h>
 #include <cutils/qtaguid.h>
 
 static const char* CTRL_PROCPATH = "/proc/net/xt_qtaguid/ctrl";
diff --git a/libcutils/sockets_unix.cpp b/libcutils/sockets_unix.cpp
index 5a14a5c..e91f358 100644
--- a/libcutils/sockets_unix.cpp
+++ b/libcutils/sockets_unix.cpp
@@ -25,9 +25,9 @@
 #include <time.h>
 #include <unistd.h>
 
-#include <android/log.h>
 #include <cutils/android_get_control_file.h>
 #include <cutils/sockets.h>
+#include <log/log.h>
 
 #include "android_get_control_env.h"
 
diff --git a/libcutils/str_parms.c b/libcutils/str_parms.c
index 6bb7e58..8dafded 100644
--- a/libcutils/str_parms.c
+++ b/libcutils/str_parms.c
@@ -24,10 +24,10 @@
 #include <stdlib.h>
 #include <string.h>
 
-#include <android/log.h>
 #include <cutils/hashmap.h>
 #include <cutils/memory.h>
 #include <cutils/str_parms.h>
+#include <log/log.h>
 
 #define UNUSED __attribute__((unused))
 
diff --git a/libdiskconfig/config_mbr.c b/libdiskconfig/config_mbr.c
index 1d3cd20..ace9bbf 100644
--- a/libdiskconfig/config_mbr.c
+++ b/libdiskconfig/config_mbr.c
@@ -22,8 +22,8 @@
 #include <stdlib.h>
 #include <string.h>
 
-#include <android/log.h>
 #include <diskconfig/diskconfig.h>
+#include <log/log.h>
 
 /* start and len are in LBA units */
 static void
diff --git a/libdiskconfig/diskconfig.c b/libdiskconfig/diskconfig.c
index 2d59ad9..c7e1b43 100644
--- a/libdiskconfig/diskconfig.c
+++ b/libdiskconfig/diskconfig.c
@@ -28,8 +28,8 @@
 #include <sys/stat.h>
 #include <unistd.h>
 
-#include <android/log.h>
 #include <cutils/config_utils.h>
+#include <log/log.h>
 
 #include <diskconfig/diskconfig.h>
 
diff --git a/libdiskconfig/diskutils.c b/libdiskconfig/diskutils.c
index 3a27601..fe1b4c1 100644
--- a/libdiskconfig/diskutils.c
+++ b/libdiskconfig/diskutils.c
@@ -26,7 +26,7 @@
 #include <sys/stat.h>
 #include <unistd.h>
 
-#include <android/log.h>
+#include <log/log.h>
 
 #include <diskconfig/diskconfig.h>
 
diff --git a/libdiskconfig/dump_diskconfig.c b/libdiskconfig/dump_diskconfig.c
index c94e7f4..3c4f620 100644
--- a/libdiskconfig/dump_diskconfig.c
+++ b/libdiskconfig/dump_diskconfig.c
@@ -19,7 +19,7 @@
 
 #include <stdio.h>
 
-#include <android/log.h>
+#include <log/log.h>
 
 #include "diskconfig.h"
 
diff --git a/libdiskconfig/write_lst.c b/libdiskconfig/write_lst.c
index 21d4a31..c3d5c0a 100644
--- a/libdiskconfig/write_lst.c
+++ b/libdiskconfig/write_lst.c
@@ -23,8 +23,8 @@
 #include <sys/types.h>
 #include <unistd.h>
 
-#include <android/log.h>
 #include <diskconfig/diskconfig.h>
+#include <log/log.h>
 
 struct write_list *
 alloc_wl(uint32_t data_len)
diff --git a/libion/ion.c b/libion/ion.c
index a7b22b8..9aaa6f2 100644
--- a/libion/ion.c
+++ b/libion/ion.c
@@ -29,8 +29,8 @@
 #include <sys/types.h>
 #include <unistd.h>
 
-#include <android/log.h>
 #include <ion/ion.h>
+#include <log/log.h>
 
 int ion_open()
 {
diff --git a/libmemtrack/memtrack.c b/libmemtrack/memtrack.c
index 29cc92c..9ed9451 100644
--- a/libmemtrack/memtrack.c
+++ b/libmemtrack/memtrack.c
@@ -22,8 +22,8 @@
 #include <malloc.h>
 #include <string.h>
 
-#include <android/log.h>
 #include <hardware/memtrack.h>
+#include <log/log.h>
 
 #define ARRAY_SIZE(x) (sizeof(x)/sizeof((x)[0]))
 
diff --git a/libmemunreachable/log.h b/libmemunreachable/log.h
index dd146b6..cdfbfd9 100644
--- a/libmemunreachable/log.h
+++ b/libmemunreachable/log.h
@@ -19,6 +19,6 @@
 
 #define LOG_TAG "libmemunreachable"
 
-#include <android/log.h>
+#include <log/log.h>
 
 #endif // LIBMEMUNREACHABLE_LOG_H_
diff --git a/libnativebridge/native_bridge.cc b/libnativebridge/native_bridge.cc
index eafc53d..83f35b1 100644
--- a/libnativebridge/native_bridge.cc
+++ b/libnativebridge/native_bridge.cc
@@ -28,7 +28,7 @@
 
 #include <cstring>
 
-#include <android/log.h>
+#include <log/log.h>
 
 namespace android {
 
diff --git a/libnativeloader/native_loader.cpp b/libnativeloader/native_loader.cpp
index 15fe054..94c46fc 100644
--- a/libnativeloader/native_loader.cpp
+++ b/libnativeloader/native_loader.cpp
@@ -19,10 +19,10 @@
 
 #include <dlfcn.h>
 #ifdef __ANDROID__
-#include "dlext_namespaces.h"
 #define LOG_TAG "libnativeloader"
-#include "android/log.h"
+#include "dlext_namespaces.h"
 #include "cutils/properties.h"
+#include "log/log.h"
 #endif
 #include "nativebridge/native_bridge.h"
 
diff --git a/libnetutils/dhcpclient.c b/libnetutils/dhcpclient.c
index d17bdd3..11c116a 100644
--- a/libnetutils/dhcpclient.c
+++ b/libnetutils/dhcpclient.c
@@ -31,8 +31,8 @@
 #include <time.h>
 #include <unistd.h>
 
-#include <android/log.h>
 #include <cutils/properties.h>
+#include <log/log.h>
 
 #include <netutils/ifc.h>
 #include "dhcpmsg.h"
diff --git a/libnetutils/ifc_utils.c b/libnetutils/ifc_utils.c
index 275327a..a098d59 100644
--- a/libnetutils/ifc_utils.c
+++ b/libnetutils/ifc_utils.c
@@ -38,8 +38,8 @@
 
 #ifdef ANDROID
 #define LOG_TAG "NetUtils"
-#include <android/log.h>
 #include <cutils/properties.h>
+#include <log/log.h>
 #else
 #define ALOGD printf
 #define ALOGW printf
diff --git a/libnetutils/packet.c b/libnetutils/packet.c
index 56168e8..e53a4c8 100644
--- a/libnetutils/packet.c
+++ b/libnetutils/packet.c
@@ -28,7 +28,7 @@
 
 #ifdef ANDROID
 #define LOG_TAG "DHCP"
-#include <android/log.h>
+#include <log/log.h>
 #else
 #include <stdio.h>
 #define ALOGD printf
diff --git a/libpackagelistparser/packagelistparser.c b/libpackagelistparser/packagelistparser.c
index f74b8b4..3e1a3d1 100644
--- a/libpackagelistparser/packagelistparser.c
+++ b/libpackagelistparser/packagelistparser.c
@@ -27,7 +27,7 @@
 #include <string.h>
 #include <sys/limits.h>
 
-#include <android/log.h>
+#include <log/log.h>
 #include <packagelistparser/packagelistparser.h>
 
 #define CLOGE(fmt, ...) \
diff --git a/libpixelflinger/codeflinger/ARMAssembler.cpp b/libpixelflinger/codeflinger/ARMAssembler.cpp
index 36c1326..ac009a9 100644
--- a/libpixelflinger/codeflinger/ARMAssembler.cpp
+++ b/libpixelflinger/codeflinger/ARMAssembler.cpp
@@ -20,8 +20,8 @@
 #include <stdio.h>
 #include <stdlib.h>
 
-#include <android/log.h>
 #include <cutils/properties.h>
+#include <log/log.h>
 #include <private/pixelflinger/ggl_context.h>
 
 #include "ARMAssembler.h"
diff --git a/libpixelflinger/codeflinger/ARMAssemblerInterface.cpp b/libpixelflinger/codeflinger/ARMAssemblerInterface.cpp
index e212f1b..c96cf4b 100644
--- a/libpixelflinger/codeflinger/ARMAssemblerInterface.cpp
+++ b/libpixelflinger/codeflinger/ARMAssemblerInterface.cpp
@@ -21,7 +21,7 @@
 #include <stdlib.h>
 #include <sys/types.h>
 
-#include <android/log.h>
+#include <log/log.h>
 
 #include "ARMAssemblerInterface.h"
 
diff --git a/libpixelflinger/codeflinger/Arm64Assembler.cpp b/libpixelflinger/codeflinger/Arm64Assembler.cpp
index fb297ec..bff87bb 100644
--- a/libpixelflinger/codeflinger/Arm64Assembler.cpp
+++ b/libpixelflinger/codeflinger/Arm64Assembler.cpp
@@ -32,8 +32,8 @@
 #include <stdlib.h>
 #include <string.h>
 
-#include <android/log.h>
 #include <cutils/properties.h>
+#include <log/log.h>
 #include <private/pixelflinger/ggl_context.h>
 
 #include "codeflinger/Arm64Assembler.h"
diff --git a/libpixelflinger/codeflinger/CodeCache.cpp b/libpixelflinger/codeflinger/CodeCache.cpp
index 37bd074..8516640 100644
--- a/libpixelflinger/codeflinger/CodeCache.cpp
+++ b/libpixelflinger/codeflinger/CodeCache.cpp
@@ -23,8 +23,8 @@
 #include <sys/mman.h>
 #include <unistd.h>
 
-#include <android/log.h>
 #include <cutils/ashmem.h>
+#include <log/log.h>
 
 #include "CodeCache.h"
 
diff --git a/libpixelflinger/codeflinger/GGLAssembler.cpp b/libpixelflinger/codeflinger/GGLAssembler.cpp
index 0b9b5a4..91fbd53 100644
--- a/libpixelflinger/codeflinger/GGLAssembler.cpp
+++ b/libpixelflinger/codeflinger/GGLAssembler.cpp
@@ -23,7 +23,7 @@
 #include <stdlib.h>
 #include <sys/types.h>
 
-#include <android/log.h>
+#include <log/log.h>
 
 #include "GGLAssembler.h"
 
diff --git a/libpixelflinger/codeflinger/MIPS64Assembler.cpp b/libpixelflinger/codeflinger/MIPS64Assembler.cpp
index a7bbaf7..d5e4cea 100644
--- a/libpixelflinger/codeflinger/MIPS64Assembler.cpp
+++ b/libpixelflinger/codeflinger/MIPS64Assembler.cpp
@@ -30,8 +30,8 @@
 #include <stdio.h>
 #include <stdlib.h>
 
-#include <android/log.h>
 #include <cutils/properties.h>
+#include <log/log.h>
 #include <private/pixelflinger/ggl_context.h>
 
 #include "MIPS64Assembler.h"
diff --git a/libpixelflinger/codeflinger/MIPSAssembler.cpp b/libpixelflinger/codeflinger/MIPSAssembler.cpp
index 4cddcc8..865a568 100644
--- a/libpixelflinger/codeflinger/MIPSAssembler.cpp
+++ b/libpixelflinger/codeflinger/MIPSAssembler.cpp
@@ -47,14 +47,13 @@
 ** functions in ARMAssemblerInterface.cpp so they could be used as static initializers).
 */
 
-
 #define LOG_TAG "MIPSAssembler"
 
 #include <stdio.h>
 #include <stdlib.h>
 
-#include <android/log.h>
 #include <cutils/properties.h>
+#include <log/log.h>
 #include <private/pixelflinger/ggl_context.h>
 
 #include "CodeCache.h"
diff --git a/libpixelflinger/codeflinger/blending.cpp b/libpixelflinger/codeflinger/blending.cpp
index 092f140..a55dfe3 100644
--- a/libpixelflinger/codeflinger/blending.cpp
+++ b/libpixelflinger/codeflinger/blending.cpp
@@ -23,7 +23,7 @@
 #include <stdlib.h>
 #include <sys/types.h>
 
-#include <android/log.h>
+#include <log/log.h>
 
 #include "GGLAssembler.h"
 
diff --git a/libpixelflinger/codeflinger/load_store.cpp b/libpixelflinger/codeflinger/load_store.cpp
index b8a0e55..da21e1d 100644
--- a/libpixelflinger/codeflinger/load_store.cpp
+++ b/libpixelflinger/codeflinger/load_store.cpp
@@ -20,7 +20,7 @@
 #include <assert.h>
 #include <stdio.h>
 
-#include <android/log.h>
+#include <log/log.h>
 
 #include "GGLAssembler.h"
 
diff --git a/libpixelflinger/codeflinger/texturing.cpp b/libpixelflinger/codeflinger/texturing.cpp
index f4f4657..4c357af 100644
--- a/libpixelflinger/codeflinger/texturing.cpp
+++ b/libpixelflinger/codeflinger/texturing.cpp
@@ -23,7 +23,7 @@
 #include <stdlib.h>
 #include <sys/types.h>
 
-#include <android/log.h>
+#include <log/log.h>
 
 #include "GGLAssembler.h"
 
diff --git a/libpixelflinger/scanline.cpp b/libpixelflinger/scanline.cpp
index 1a2f6fb..c6cf5bf 100644
--- a/libpixelflinger/scanline.cpp
+++ b/libpixelflinger/scanline.cpp
@@ -22,8 +22,8 @@
 #include <stdlib.h>
 #include <string.h>
 
-#include <android/log.h>
 #include <cutils/memory.h>
+#include <log/log.h>
 
 #include "buffer.h"
 #include "scanline.h"
diff --git a/libpixelflinger/trap.cpp b/libpixelflinger/trap.cpp
index fa6338a..234bfdd 100644
--- a/libpixelflinger/trap.cpp
+++ b/libpixelflinger/trap.cpp
@@ -21,8 +21,8 @@
 #include <stdio.h>
 #include <stdlib.h>
 
-#include <android/log.h>
 #include <cutils/memory.h>
+#include <log/log.h>
 
 #include "trap.h"
 #include "picker.h"
diff --git a/libsparse/Android.bp b/libsparse/Android.bp
index 7a6ae8a..dd8b5fd 100644
--- a/libsparse/Android.bp
+++ b/libsparse/Android.bp
@@ -1,7 +1,9 @@
 // Copyright 2010 The Android Open Source Project
 
-cc_defaults {
-    name: "libsparse_defaults",
+cc_library {
+    name: "libsparse",
+    host_supported: true,
+    unique_host_soname: true,
     srcs: [
         "backed_block.c",
         "output_file.c",
@@ -13,32 +15,19 @@
     cflags: ["-Werror"],
     local_include_dirs: ["include"],
     export_include_dirs: ["include"],
-}
-
-cc_library_host_static {
-    name: "libsparse_host",
-    defaults: ["libsparse_defaults"],
-    static_libs: ["libz"],
     target: {
+        host: {
+            shared_libs: ["libz-host"],
+        },
+        android: {
+            shared_libs: ["libz"],
+        },
         windows: {
             enabled: true,
         },
     },
 }
 
-cc_library_shared {
-    name: "libsparse",
-    defaults: ["libsparse_defaults"],
-    shared_libs: ["libz"],
-}
-
-cc_library_static {
-    name: "libsparse_static",
-    host_supported: true,
-    defaults: ["libsparse_defaults"],
-    static_libs: ["libz"],
-}
-
 cc_binary {
     name: "simg2img",
     host_supported: true,
@@ -47,7 +36,7 @@
         "sparse_crc32.c",
     ],
     static_libs: [
-        "libsparse_static",
+        "libsparse",
         "libz",
     ],
 
@@ -59,7 +48,7 @@
     host_supported: true,
     srcs: ["img2simg.c"],
     static_libs: [
-        "libsparse_static",
+        "libsparse",
         "libz",
     ],
 
@@ -70,7 +59,7 @@
     name: "append2simg",
     srcs: ["append2simg.c"],
     static_libs: [
-        "libsparse_static",
+        "libsparse",
         "libz",
     ],
 
diff --git a/libsuspend/autosuspend.c b/libsuspend/autosuspend.c
index 64d1bfc..54730c2 100644
--- a/libsuspend/autosuspend.c
+++ b/libsuspend/autosuspend.c
@@ -18,7 +18,7 @@
 
 #include <stdbool.h>
 
-#include <android/log.h>
+#include <log/log.h>
 
 #include <suspend/autosuspend.h>
 
diff --git a/libsuspend/autosuspend_autosleep.c b/libsuspend/autosuspend_autosleep.c
index 97109ac..77d8db0 100644
--- a/libsuspend/autosuspend_autosleep.c
+++ b/libsuspend/autosuspend_autosleep.c
@@ -24,7 +24,7 @@
 #include <sys/types.h>
 #include <unistd.h>
 
-#include <android/log.h>
+#include <log/log.h>
 
 #include "autosuspend_ops.h"
 
diff --git a/libsuspend/autosuspend_earlysuspend.c b/libsuspend/autosuspend_earlysuspend.c
index 9519e51..809ee82 100644
--- a/libsuspend/autosuspend_earlysuspend.c
+++ b/libsuspend/autosuspend_earlysuspend.c
@@ -26,7 +26,7 @@
 #include <sys/types.h>
 #include <unistd.h>
 
-#include <android/log.h>
+#include <log/log.h>
 
 #include "autosuspend_ops.h"
 
diff --git a/libsuspend/autosuspend_wakeup_count.c b/libsuspend/autosuspend_wakeup_count.c
index 3457d5b..2da204a 100644
--- a/libsuspend/autosuspend_wakeup_count.c
+++ b/libsuspend/autosuspend_wakeup_count.c
@@ -29,7 +29,7 @@
 #include <sys/types.h>
 #include <unistd.h>
 
-#include <android/log.h>
+#include <log/log.h>
 
 #include "autosuspend_ops.h"
 
diff --git a/libutils/Looper.cpp b/libutils/Looper.cpp
index 26e27cf..77e69e4 100644
--- a/libutils/Looper.cpp
+++ b/libutils/Looper.cpp
@@ -21,7 +21,7 @@
 #include <sys/eventfd.h>
 #include <unistd.h>
 
-#include <android/log.h>
+#include <log/log.h>
 #include <utils/Looper.h>
 #include <utils/Timers.h>
 
diff --git a/libutils/SharedBuffer.cpp b/libutils/SharedBuffer.cpp
index 269326a..957aedb 100644
--- a/libutils/SharedBuffer.cpp
+++ b/libutils/SharedBuffer.cpp
@@ -19,7 +19,7 @@
 #include <stdlib.h>
 #include <string.h>
 
-#include <android/log.h>
+#include <log/log.h>
 
 #include "SharedBuffer.h"
 
diff --git a/libutils/Unicode.cpp b/libutils/Unicode.cpp
index c32f462..f1a41b9 100644
--- a/libutils/Unicode.cpp
+++ b/libutils/Unicode.cpp
@@ -19,7 +19,7 @@
 #include <limits.h>
 #include <stddef.h>
 
-#include <android/log.h>
+#include <log/log.h>
 #include <utils/Unicode.h>
 
 #if defined(_WIN32)
diff --git a/libutils/VectorImpl.cpp b/libutils/VectorImpl.cpp
index 893e4f2..f7ca8f4 100644
--- a/libutils/VectorImpl.cpp
+++ b/libutils/VectorImpl.cpp
@@ -20,7 +20,7 @@
 #include <stdlib.h>
 #include <string.h>
 
-#include <android/log.h>
+#include <log/log.h>
 #include <utils/Errors.h>
 #include <utils/VectorImpl.h>
 
diff --git a/libziparchive/zip_archive_stream_entry.cc b/libziparchive/zip_archive_stream_entry.cc
index 64b24c3..3f336a6 100644
--- a/libziparchive/zip_archive_stream_entry.cc
+++ b/libziparchive/zip_archive_stream_entry.cc
@@ -26,8 +26,9 @@
 #include <memory>
 #include <vector>
 
-#include <android/log.h>
 #include <android-base/file.h>
+#include <log/log.h>
+
 #include <ziparchive/zip_archive.h>
 #include <ziparchive/zip_archive_stream_entry.h>
 #include <zlib.h>
diff --git a/lmkd/lmkd.c b/lmkd/lmkd.c
index 49746b3..8a6168c 100644
--- a/lmkd/lmkd.c
+++ b/lmkd/lmkd.c
@@ -31,8 +31,8 @@
 #include <sys/types.h>
 #include <unistd.h>
 
-#include <android/log.h>
 #include <cutils/sockets.h>
+#include <log/log.h>
 #include <processgroup/processgroup.h>
 
 #ifndef __unused
diff --git a/logwrapper/logwrap.c b/logwrapper/logwrap.c
index 1bfecd6..3ad0983 100644
--- a/logwrapper/logwrap.c
+++ b/logwrapper/logwrap.c
@@ -28,8 +28,8 @@
 #include <sys/wait.h>
 #include <unistd.h>
 
-#include <android/log.h>
 #include <cutils/klog.h>
+#include <log/log.h>
 #include <logwrap/logwrap.h>
 #include <private/android_filesystem_config.h>
 
diff --git a/logwrapper/logwrapper.c b/logwrapper/logwrapper.c
index 28fe530..33454c6 100644
--- a/logwrapper/logwrapper.c
+++ b/logwrapper/logwrapper.c
@@ -20,8 +20,8 @@
 #include <sys/wait.h>
 #include <unistd.h>
 
-#include <android/log.h>
 #include <cutils/klog.h>
+#include <log/log.h>
 #include <logwrap/logwrap.h>
 
 void fatal(const char *msg) {
diff --git a/rootdir/init.rc b/rootdir/init.rc
index c0a0fce..791d67f 100644
--- a/rootdir/init.rc
+++ b/rootdir/init.rc
@@ -312,6 +312,7 @@
     # Make sure /sys/kernel/debug (if present) is labeled properly
     # Note that tracefs may be mounted under debug, so we need to cross filesystems
     restorecon --recursive --cross-filesystems /sys/kernel/debug
+    chmod 0755 /sys/kernel/debug/tracing
 
     # We chown/chmod /cache again so because mount is run as root + defaults
     chown system cache /cache
diff --git a/trusty/gatekeeper/trusty_gatekeeper.cpp b/trusty/gatekeeper/trusty_gatekeeper.cpp
index 7e55fb1..b3fbfa9 100644
--- a/trusty/gatekeeper/trusty_gatekeeper.cpp
+++ b/trusty/gatekeeper/trusty_gatekeeper.cpp
@@ -19,9 +19,10 @@
 #include <assert.h>
 #include <errno.h>
 #include <stdio.h>
+
 #include <type_traits>
 
-#include <android/log.h>
+#include <log/log.h>
 
 #include "trusty_gatekeeper.h"
 #include "trusty_gatekeeper_ipc.h"
diff --git a/trusty/gatekeeper/trusty_gatekeeper_ipc.c b/trusty/gatekeeper/trusty_gatekeeper_ipc.c
index 45e65a7..f67944b 100644
--- a/trusty/gatekeeper/trusty_gatekeeper_ipc.c
+++ b/trusty/gatekeeper/trusty_gatekeeper_ipc.c
@@ -22,7 +22,7 @@
 #include <string.h>
 #include <unistd.h>
 
-#include <android/log.h>
+#include <log/log.h>
 #include <trusty/tipc.h>
 
 #include "trusty_gatekeeper_ipc.h"
diff --git a/trusty/keymaster/trusty_keymaster_device.cpp b/trusty/keymaster/trusty_keymaster_device.cpp
index de5e463..1368f88 100644
--- a/trusty/keymaster/trusty_keymaster_device.cpp
+++ b/trusty/keymaster/trusty_keymaster_device.cpp
@@ -27,9 +27,9 @@
 
 #include <type_traits>
 
-#include <android/log.h>
 #include <hardware/keymaster0.h>
 #include <keymaster/authorization_set.h>
+#include <log/log.h>
 
 #include "trusty_keymaster_device.h"
 #include "trusty_keymaster_ipc.h"
diff --git a/trusty/keymaster/trusty_keymaster_ipc.c b/trusty/keymaster/trusty_keymaster_ipc.c
index 8755093..88546af 100644
--- a/trusty/keymaster/trusty_keymaster_ipc.c
+++ b/trusty/keymaster/trusty_keymaster_ipc.c
@@ -23,7 +23,7 @@
 #include <string.h>
 #include <unistd.h>
 
-#include <android/log.h>
+#include <log/log.h>
 #include <trusty/tipc.h>
 
 #include "trusty_keymaster_ipc.h"
diff --git a/trusty/libtrusty/trusty.c b/trusty/libtrusty/trusty.c
index 2398a53..a6238af 100644
--- a/trusty/libtrusty/trusty.c
+++ b/trusty/libtrusty/trusty.c
@@ -25,7 +25,7 @@
 #include <sys/ioctl.h>
 #include <unistd.h>
 
-#include <android/log.h>
+#include <log/log.h>
 
 #include "tipc_ioctl.h"
 
diff --git a/trusty/nvram/trusty_nvram_implementation.cpp b/trusty/nvram/trusty_nvram_implementation.cpp
index ddaf333..9215c85 100644
--- a/trusty/nvram/trusty_nvram_implementation.cpp
+++ b/trusty/nvram/trusty_nvram_implementation.cpp
@@ -22,8 +22,8 @@
 #include <string.h>
 #include <unistd.h>
 
-#include <android/log.h>
 #include <hardware/nvram.h>
+#include <log/log.h>
 #include <trusty/tipc.h>
 
 #include <nvram/messages/blob.h>
diff --git a/trusty/storage/lib/storage.c b/trusty/storage/lib/storage.c
index 3002c0b..915bc17 100644
--- a/trusty/storage/lib/storage.c
+++ b/trusty/storage/lib/storage.c
@@ -23,7 +23,7 @@
 #include <string.h>
 #include <sys/uio.h>
 
-#include <android/log.h>
+#include <log/log.h>
 #include <trusty/tipc.h>
 #include <trusty/lib/storage.h>
 
diff --git a/tzdatacheck/tzdatacheck.cpp b/tzdatacheck/tzdatacheck.cpp
index c1ab2ac..fb5c84b 100644
--- a/tzdatacheck/tzdatacheck.cpp
+++ b/tzdatacheck/tzdatacheck.cpp
@@ -14,6 +14,7 @@
  * limitations under the License.
  */
 
+#include <ctype.h>
 #include <errno.h>
 #include <ftw.h>
 #include <libgen.h>
@@ -29,47 +30,105 @@
 
 #include "android-base/logging.h"
 
+static const char* BUNDLE_VERSION_FILENAME = "/bundle_version";
+// bundle_version is an ASCII file consisting of 17 bytes in the form: AAA.BBB|CCCCC|DDD
+// AAA.BBB is the major/minor version of the bundle format (e.g. 001.001),
+// CCCCC is the rules version (e.g. 2016g)
+// DDD is the android revision for this rules version to allow for bundle corrections (e.g. 001)
+// We only need the first 13 to determine if it is suitable for the device.
+static const int BUNDLE_VERSION_LENGTH = 13;
+// The major version of the bundle format supported by this code as a null-terminated char[].
+static const char REQUIRED_BUNDLE_VERSION[] = "001";
+static const size_t REQUIRED_BUNDLE_VERSION_LEN = sizeof(REQUIRED_BUNDLE_VERSION) - 1; // exclude \0
+// The length of the IANA rules version bytes. e.g. 2016a
+static const size_t RULES_VERSION_LEN = 5;
+// Bundle version bytes are: AAA.BBB|CCCCC - the rules version is CCCCC
+static const size_t BUNDLE_VERSION_RULES_IDX = 8;
+
 static const char* TZDATA_FILENAME = "/tzdata";
 // tzdata file header (as much as we need for the version):
 // byte[11] tzdata_version  -- e.g. "tzdata2012f"
 static const int TZ_HEADER_LENGTH = 11;
+// The major version of the bundle format supported by this code as a null-terminated char[].
+static const char TZ_DATA_HEADER_PREFIX[] = "tzdata";
+static const size_t TZ_DATA_HEADER_PREFIX_LEN = sizeof(TZ_DATA_HEADER_PREFIX) - 1; // exclude \0
+
 
 static void usage() {
     std::cerr << "Usage: tzdatacheck SYSTEM_TZ_DIR DATA_TZ_DIR\n"
             "\n"
-            "Compares the headers of two tzdata files. If the one in SYSTEM_TZ_DIR is the\n"
-            "same or a higher version than the one in DATA_TZ_DIR the DATA_TZ_DIR is renamed\n"
-            "and then deleted.\n";
+            "Checks whether any timezone update bundle in DATA_TZ_DIR is compatible with the\n"
+            "current Android release and better than or the same as base system timezone rules in\n"
+            "SYSTEM_TZ_DIR. If the timezone rules in SYSTEM_TZ_DIR are a higher version than the\n"
+            "one in DATA_TZ_DIR the DATA_TZ_DIR is renamed and then deleted.\n";
     exit(1);
 }
 
 /*
- * Opens a file and fills headerBytes with the first byteCount bytes from the file. It is a fatal
- * error if the file is too small or cannot be opened. If the file does not exist false is returned.
+ * Opens a file and fills buffer with the first byteCount bytes from the file.
+ * If the file does not exist or cannot be opened or is too short then false is returned.
  * If the bytes were read successfully then true is returned.
  */
-static bool readHeader(const std::string& tzDataFileName, char* headerBytes, size_t byteCount) {
-    FILE* tzDataFile = fopen(tzDataFileName.c_str(), "r");
-    if (tzDataFile == nullptr) {
-        if (errno == ENOENT) {
-            return false;
-        } else {
-            PLOG(FATAL) << "Error opening tzdata file " << tzDataFileName;
+static bool readBytes(const std::string& fileName, char* buffer, size_t byteCount) {
+    FILE* file = fopen(fileName.c_str(), "r");
+    if (file == nullptr) {
+        if (errno != ENOENT) {
+            PLOG(WARNING) << "Error opening file " << fileName;
         }
+        return false;
     }
-    size_t bytesRead = fread(headerBytes, 1, byteCount, tzDataFile);
+    size_t bytesRead = fread(buffer, 1, byteCount, file);
+    fclose(file);
     if (bytesRead != byteCount) {
-        LOG(FATAL) << tzDataFileName << " is too small. " << byteCount << " bytes required";
+        LOG(WARNING) << fileName << " is too small. " << byteCount << " bytes required";
+        return false;
     }
-    fclose(tzDataFile);
     return true;
 }
 
-/* Checks the contents of headerBytes. It is a fatal error if it not a tzdata header. */
-static void checkValidHeader(const std::string& fileName, char* headerBytes) {
+/*
+ * Checks the contents of headerBytes. Returns true if it is valid (starts with "tzdata"), false
+ * otherwise.
+ */
+static bool checkValidTzDataHeader(const std::string& fileName, const char* headerBytes) {
     if (strncmp("tzdata", headerBytes, 6) != 0) {
-        LOG(FATAL) << fileName << " does not start with the expected bytes (tzdata)";
+        LOG(WARNING) << fileName << " does not start with the expected bytes (tzdata)";
+        return false;
     }
+    return true;
+}
+
+static bool checkDigits(const char* buffer, const size_t count, size_t* i) {
+    for (size_t j = 0; j < count; j++) {
+      char toCheck = buffer[(*i)++];
+      if (!isdigit(toCheck)) {
+        return false;
+      }
+    }
+    return true;
+}
+
+static bool checkValidBundleVersion(const char* buffer) {
+    // See BUNDLE_VERSION_LENGTH comments above for a description of the format.
+    size_t i = 0;
+    if (!checkDigits(buffer, 3, &i)) {
+      return false;
+    }
+    if (buffer[i++] != '.') {
+      return false;
+    }
+    if (!checkDigits(buffer, 3, &i)) {
+      return false;
+    }
+    if (buffer[i++] != '|') {
+      return false;
+    }
+    if (!checkDigits(buffer, 4, &i)) {
+      return false;
+    }
+    // Ignore the last character. It is assumed to be a letter but we don't check because it's not
+    // obvious what would happen at 'z'.
+    return true;
 }
 
 /* Return the parent directory of dirName. */
@@ -103,9 +162,24 @@
     return 0;
 }
 
+enum PathStatus { ERR, NONE, IS_DIR, NOT_DIR };
+
+static PathStatus checkPath(const std::string& path) {
+    struct stat buf;
+    if (stat(path.c_str(), &buf) != 0) {
+        if (errno != ENOENT) {
+            PLOG(WARNING) << "Unable to stat " << path;
+            return ERR;
+        }
+        return NONE;
+    }
+    return S_ISDIR(buf.st_mode) ? IS_DIR : NOT_DIR;
+}
+
 /*
  * Deletes dirToDelete and returns true if it is successful in removing or moving the directory out
- * of the way. If dirToDelete does not exist this function does nothing and returns true.
+ * of the way. If dirToDelete does not exist this function does nothing and returns true. If
+ * dirToDelete is not a directory or cannot be accessed this method returns false.
  *
  * During deletion, this function first renames the directory to a temporary name. If the temporary
  * directory cannot be created, or the directory cannot be renamed, false is returned. After the
@@ -114,23 +188,18 @@
  */
 static bool deleteDir(const std::string& dirToDelete) {
     // Check whether the dir exists.
-    struct stat buf;
-    if (stat(dirToDelete.c_str(), &buf) == 0) {
-      if (!S_ISDIR(buf.st_mode)) {
-        LOG(WARNING) << dirToDelete << " is not a directory";
+    int pathStatus = checkPath(dirToDelete);
+    if (pathStatus == NONE) {
+        LOG(INFO) << "Path " << dirToDelete << " does not exist";
+        return true;
+    }
+    if (pathStatus != IS_DIR) {
+        LOG(WARNING) << "Path " << dirToDelete << " failed to stat() or is not a directory.";
         return false;
-      }
-    } else {
-      if (errno == ENOENT) {
-          PLOG(INFO) << "Directory does not exist: " << dirToDelete;
-          return true;
-      } else {
-          PLOG(WARNING) << "Unable to stat " << dirToDelete;
-          return false;
-      }
     }
 
     // First, rename dirToDelete.
+
     std::string tempDirNameTemplate = getParentDir(dirToDelete);
     tempDirNameTemplate += "/tempXXXXXX";
 
@@ -142,7 +211,7 @@
         return false;
     }
 
-    // Rename dirToDelete to tempDirName.
+    // Rename dirToDelete to tempDirName (replacing the empty tempDirName directory created above).
     int rc = rename(dirToDelete.c_str(), &tempDirName[0]);
     if (rc == -1) {
         PLOG(WARNING) << "Unable to rename directory from " << dirToDelete << " to "
@@ -151,6 +220,7 @@
     }
 
     // Recursively delete contents of tempDirName.
+
     rc = nftw(&tempDirName[0], deleteFn, 10 /* openFiles */,
             FTW_DEPTH | FTW_MOUNT | FTW_PHYS);
     if (rc == -1) {
@@ -160,9 +230,36 @@
 }
 
 /*
+ * Deletes the ConfigInstaller metadata directory.
+ * TODO(nfuller). http://b/31008728 Remove this when ConfigInstaller is no longer used.
+ */
+static void deleteConfigUpdaterMetadataDir(const char* dataZoneInfoDir) {
+    // Delete the update metadata
+    std::string dataUpdatesDirName(dataZoneInfoDir);
+    dataUpdatesDirName += "/updates";
+    LOG(INFO) << "Removing: " << dataUpdatesDirName;
+    bool deleted = deleteDir(dataUpdatesDirName);
+    if (!deleted) {
+        LOG(WARNING) << "Deletion of install metadata " << dataUpdatesDirName
+                << " was not successful";
+    }
+}
+
+/*
+ * Deletes the timezone update bundle directory.
+ */
+static void deleteUpdateBundleDir(std::string& bundleDirName) {
+    LOG(INFO) << "Removing: " << bundleDirName;
+    bool deleted = deleteDir(bundleDirName);
+    if (!deleted) {
+        LOG(WARNING) << "Deletion of bundle dir " << bundleDirName << " was not successful";
+    }
+}
+
+/*
  * After a platform update it is likely that timezone data found on the system partition will be
  * newer than the version found in the data partition. This tool detects this case and removes the
- * version in /data along with any update metadata.
+ * version in /data.
  *
  * Note: This code is related to code in com.android.server.updates.TzDataInstallReceiver. The
  * paths for the metadata and current timezone data must match.
@@ -175,62 +272,103 @@
 int main(int argc, char* argv[]) {
     if (argc != 3) {
         usage();
+        return 1;
     }
 
     const char* systemZoneInfoDir = argv[1];
     const char* dataZoneInfoDir = argv[2];
 
+    // Check the bundle directory exists. If it does not, exit quickly: nothing to do.
     std::string dataCurrentDirName(dataZoneInfoDir);
     dataCurrentDirName += "/current";
-    std::string dataTzDataFileName(dataCurrentDirName);
-    dataTzDataFileName += TZDATA_FILENAME;
-
-    std::vector<char> dataTzDataHeader;
-    dataTzDataHeader.reserve(TZ_HEADER_LENGTH);
-
-    bool dataFileExists = readHeader(dataTzDataFileName, dataTzDataHeader.data(), TZ_HEADER_LENGTH);
-    if (!dataFileExists) {
-        LOG(INFO) << "tzdata file " << dataTzDataFileName << " does not exist. No action required.";
+    int dataCurrentDirStatus = checkPath(dataCurrentDirName);
+    if (dataCurrentDirStatus == NONE) {
+        LOG(INFO) << "timezone bundle dir " << dataCurrentDirName
+                << " does not exist. No action required.";
         return 0;
     }
-    checkValidHeader(dataTzDataFileName, dataTzDataHeader.data());
+    // If the bundle directory path is not a directory or we can't stat() the path, exit with a
+    // warning: either there's a problem accessing storage or the world is not as it should be;
+    // nothing to do.
+    if (dataCurrentDirStatus != IS_DIR) {
+        LOG(WARNING) << "Current bundle dir " << dataCurrentDirName
+                << " could not be accessed or is not a directory. result=" << dataCurrentDirStatus;
+        return 2;
+    }
 
+    // Check the installed bundle version.
+    std::string bundleVersionFileName(dataCurrentDirName);
+    bundleVersionFileName += BUNDLE_VERSION_FILENAME;
+    std::vector<char> bundleVersion;
+    bundleVersion.reserve(BUNDLE_VERSION_LENGTH);
+    bool bundleVersionReadOk =
+            readBytes(bundleVersionFileName, bundleVersion.data(), BUNDLE_VERSION_LENGTH);
+    if (!bundleVersionReadOk) {
+        LOG(WARNING) << "bundle version file " << bundleVersionFileName
+                << " does not exist or is too short. Deleting bundle dir.";
+        // Implies the contents of the data partition is corrupt in some way. Try to clean up.
+        deleteConfigUpdaterMetadataDir(dataZoneInfoDir);
+        deleteUpdateBundleDir(dataCurrentDirName);
+        return 3;
+    }
+
+    if (!checkValidBundleVersion(bundleVersion.data())) {
+        LOG(WARNING) << "bundle version file " << bundleVersionFileName
+                << " is not valid. Deleting bundle dir.";
+        // Implies the contents of the data partition is corrupt in some way. Try to clean up.
+        deleteConfigUpdaterMetadataDir(dataZoneInfoDir);
+        deleteUpdateBundleDir(dataCurrentDirName);
+        return 4;
+    }
+
+    // Check the first 3 bytes of the bundleVersionHeader: these are the major version (e.g. 001).
+    // It must match exactly to be ok. The minor version is currently ignored.
+    if (strncmp(&bundleVersion[0], REQUIRED_BUNDLE_VERSION, REQUIRED_BUNDLE_VERSION_LEN) != 0) {
+        LOG(INFO) << "bundle version file " << bundleVersionFileName
+                << " is not the required version " << REQUIRED_BUNDLE_VERSION
+                << ". Deleting bundle dir.";
+        // This shouldn't happen with 001, but it in future, this will imply there has been an OTA
+        // and the installed bundle is not compatible with the new version of Android. Remove the
+        // installed bundle.
+        deleteConfigUpdaterMetadataDir(dataZoneInfoDir);
+        deleteUpdateBundleDir(dataCurrentDirName);
+        return 5;
+    }
+
+    // Read the system rules version out of the /system tzdata file.
     std::string systemTzDataFileName(systemZoneInfoDir);
     systemTzDataFileName += TZDATA_FILENAME;
     std::vector<char> systemTzDataHeader;
     systemTzDataHeader.reserve(TZ_HEADER_LENGTH);
     bool systemFileExists =
-            readHeader(systemTzDataFileName, systemTzDataHeader.data(), TZ_HEADER_LENGTH);
+            readBytes(systemTzDataFileName, systemTzDataHeader.data(), TZ_HEADER_LENGTH);
     if (!systemFileExists) {
-        LOG(FATAL) << systemTzDataFileName << " does not exist or could not be opened";
+        // Implies the contents of the system partition is corrupt in some way. Nothing we can do.
+        LOG(WARNING) << systemTzDataFileName << " does not exist or could not be opened";
+        return 6;
     }
-    checkValidHeader(systemTzDataFileName, systemTzDataHeader.data());
-
-    if (strncmp(&systemTzDataHeader[0], &dataTzDataHeader[0], TZ_HEADER_LENGTH) < 0) {
-        LOG(INFO) << "tzdata file " << dataTzDataFileName << " is the newer than "
-                << systemTzDataFileName << ". No action required.";
-    } else {
-        // We have detected the case this tool is intended to prevent. Go fix it.
-        LOG(INFO) << "tzdata file " << dataTzDataFileName << " is the same as or older than "
-                << systemTzDataFileName << "; fixing...";
-
-        // Delete the update metadata
-        std::string dataUpdatesDirName(dataZoneInfoDir);
-        dataUpdatesDirName += "/updates";
-        LOG(INFO) << "Removing: " << dataUpdatesDirName;
-        bool deleted = deleteDir(dataUpdatesDirName);
-        if (!deleted) {
-            LOG(WARNING) << "Deletion of install metadata " << dataUpdatesDirName
-                    << " was not successful";
-        }
-
-        // Delete the TZ data
-        LOG(INFO) << "Removing: " << dataCurrentDirName;
-        deleted = deleteDir(dataCurrentDirName);
-        if (!deleted) {
-            LOG(WARNING) << "Deletion of tzdata " << dataCurrentDirName << " was not successful";
-        }
+    if (!checkValidTzDataHeader(systemTzDataFileName, systemTzDataHeader.data())) {
+        // Implies the contents of the system partition is corrupt in some way. Nothing we can do.
+        LOG(WARNING) << systemTzDataFileName << " does not have a valid header.";
+        return 7;
     }
 
+    // Compare the bundle rules version against the system rules version.
+    if (strncmp(
+            &systemTzDataHeader[TZ_DATA_HEADER_PREFIX_LEN],
+            &bundleVersion[BUNDLE_VERSION_RULES_IDX],
+            RULES_VERSION_LEN) <= 0) {
+        LOG(INFO) << "Found an installed bundle but it is valid. No action taken.";
+        // Implies there is an installed update, but it is good.
+        return 0;
+    }
+
+    // Implies there has been an OTA and the system version of the timezone rules is now newer
+    // than the version installed in /data. Remove the installed bundle.
+    LOG(INFO) << "timezone bundle in " << dataCurrentDirName << " is older than data in "
+            << systemTzDataFileName << "; fixing...";
+
+    deleteConfigUpdaterMetadataDir(dataZoneInfoDir);
+    deleteUpdateBundleDir(dataCurrentDirName);
     return 0;
 }