Check the data directory before mount tmpfs
As it's possible that dir is not created when mount tmpfs on external
private mount, add a busy waiting check in zygote to ensure data
directory is created before we do our work.
Bug:189406326
Change-Id: I5e5beca36383027580eeb9ead77f59ce4b3ee4e5
diff --git a/core/jni/com_android_internal_os_Zygote.cpp b/core/jni/com_android_internal_os_Zygote.cpp
index 1b3f78c..69c2c5b 100644
--- a/core/jni/com_android_internal_os_Zygote.cpp
+++ b/core/jni/com_android_internal_os_Zygote.cpp
@@ -201,6 +201,8 @@
*/
static constexpr int STORAGE_DIR_CHECK_TIMEOUT_US = 1000 * 1000 * 60 * 5;
+static void WaitUntilDirReady(const std::string& target, fail_fn_t fail_fn);
+
/**
* A helper class containing accounting information for USAPs.
*/
@@ -1248,7 +1250,11 @@
auto volPath = StringPrintf("%s/%s", externalPrivateMountPath, ent->d_name);
auto cePath = StringPrintf("%s/user", volPath.c_str());
auto dePath = StringPrintf("%s/user_de", volPath.c_str());
+ // Wait until dir user is created.
+ WaitUntilDirReady(cePath.c_str(), fail_fn);
MountAppDataTmpFs(cePath.c_str(), fail_fn);
+ // Wait until dir user_de is created.
+ WaitUntilDirReady(dePath.c_str(), fail_fn);
MountAppDataTmpFs(dePath.c_str(), fail_fn);
}
closedir(dir);