Merge changes from topic "snapuserd_ramdisk"
* changes:
Prefer generic ramdisk copy of snapuserd
Install snapuserd.ramdisk with a separate path
diff --git a/fs_mgr/libsnapshot/snapuserd/Android.bp b/fs_mgr/libsnapshot/snapuserd/Android.bp
index bc2bceb..fbc8c30 100644
--- a/fs_mgr/libsnapshot/snapuserd/Android.bp
+++ b/fs_mgr/libsnapshot/snapuserd/Android.bp
@@ -72,7 +72,7 @@
cflags: [
"-Wall",
- "-Werror"
+ "-Werror",
],
static_libs: [
@@ -89,14 +89,7 @@
"liburing",
],
include_dirs: ["bionic/libc/kernel"],
-}
-
-cc_binary {
- name: "snapuserd",
- defaults: ["snapuserd_defaults"],
- init_rc: [
- "snapuserd.rc",
- ],
+ system_shared_libs: [],
// snapuserd is started during early boot by first-stage init. At that
// point, /system is mounted using the "dm-user" device-mapper kernel
@@ -105,16 +98,40 @@
// faults for its code pages.
static_executable: true,
- system_shared_libs: [],
- ramdisk_available: true,
- vendor_ramdisk_available: true,
- recovery_available: true,
-
// Snapuserd segfaults with ThinLTO
// http://b/208565717
lto: {
never: true,
- }
+ },
+}
+
+cc_binary {
+ name: "snapuserd",
+ defaults: ["snapuserd_defaults"],
+ init_rc: [
+ "snapuserd.rc",
+ ],
+ ramdisk_available: false,
+ vendor_ramdisk_available: true,
+ recovery_available: true,
+}
+
+// This target will install to /system/bin/snapuserd_ramdisk
+// It will also create a symblink on /system/bin/snapuserd that point to
+// /system/bin/snapuserd_ramdisk .
+// This way, init can check if generic ramdisk copy exists.
+cc_binary {
+ name: "snapuserd_ramdisk",
+ defaults: ["snapuserd_defaults"],
+ init_rc: [
+ "snapuserd.rc",
+ ],
+ // This target is specifically for generic ramdisk, therefore we set
+ // vendor_ramdisk_available to false.
+ ramdisk_available: true,
+ vendor_ramdisk_available: false,
+ ramdisk: true,
+ symlinks: ["snapuserd"],
}
cc_test {
diff --git a/init/first_stage_init.cpp b/init/first_stage_init.cpp
index d050ed7..202a86a 100644
--- a/init/first_stage_init.cpp
+++ b/init/first_stage_init.cpp
@@ -119,19 +119,14 @@
// Move snapuserd before switching root, so that it is available at the same path
// after switching root.
void PrepareSwitchRoot() {
- constexpr const char* src = "/system/bin/snapuserd";
- constexpr const char* dst = "/first_stage_ramdisk/system/bin/snapuserd";
+ static constexpr const auto& snapuserd = "/system/bin/snapuserd";
+ static constexpr const auto& snapuserd_ramdisk = "/system/bin/snapuserd_ramdisk";
+ static constexpr const auto& dst = "/first_stage_ramdisk/system/bin/snapuserd";
if (access(dst, X_OK) == 0) {
LOG(INFO) << dst << " already exists and it can be executed";
return;
}
-
- if (access(src, F_OK) != 0) {
- PLOG(INFO) << "Not moving " << src << " because it cannot be accessed";
- return;
- }
-
auto dst_dir = android::base::Dirname(dst);
std::error_code ec;
if (access(dst_dir.c_str(), F_OK) != 0) {
@@ -139,7 +134,18 @@
LOG(FATAL) << "Cannot create " << dst_dir << ": " << ec.message();
}
}
- Copy(src, dst);
+
+ // prefer the generic ramdisk copy of snapuserd, because that's on system side of treble
+ // boundary, and therefore is more likely to be updated along with the Android platform.
+ // The vendor ramdisk copy might be under vendor freeze, or vendor might choose not to update
+ // it.
+ if (access(snapuserd_ramdisk, F_OK) == 0) {
+ LOG(INFO) << "Using generic ramdisk copy of snapuserd " << snapuserd_ramdisk;
+ Copy(snapuserd_ramdisk, dst);
+ } else if (access(snapuserd, F_OK) == 0) {
+ LOG(INFO) << "Using vendor ramdisk copy of snapuserd " << snapuserd;
+ Copy(snapuserd, dst);
+ }
}
} // namespace