Implement powerwash on Android.
Powerwash, the name for the equivalent of a factory reset or /data wipe,
can be triggered in Android by writing the desired command to the
recovery command file and rebooting into recovery.
This patch moves the powerwash scheduling/canceling logic to the
HardwareInterface and implements it on Android.
Bug: 28700985
TEST=Called update_engine_client passing POWERWASH=1, BCB is stored up
to offset 832.
Change-Id: If737fd4b9b3e2ed9bce709b3b59f22e9f0a3dc9a
diff --git a/hardware_chromeos.cc b/hardware_chromeos.cc
index 57583a1..9b3a05d 100644
--- a/hardware_chromeos.cc
+++ b/hardware_chromeos.cc
@@ -53,6 +53,14 @@
// a powerwash is performed.
const char kPowerwashCountMarker[] = "powerwash_count";
+// The name of the marker file used to trigger powerwash when post-install
+// completes successfully so that the device is powerwashed on next reboot.
+const char kPowerwashMarkerFile[] =
+ "/mnt/stateful_partition/factory_install_reset";
+
+// The contents of the powerwash marker file.
+const char kPowerwashCommand[] = "safe fast keepimg reason=update_engine\n";
+
// UpdateManager config path.
const char* kConfigFilePath = "/etc/update_manager.conf";
@@ -162,6 +170,32 @@
return powerwash_count;
}
+bool HardwareChromeOS::SchedulePowerwash() {
+ bool result = utils::WriteFile(
+ kPowerwashMarkerFile, kPowerwashCommand, strlen(kPowerwashCommand));
+ if (result) {
+ LOG(INFO) << "Created " << marker_file << " to powerwash on next reboot";
+ } else {
+ PLOG(ERROR) << "Error in creating powerwash marker file: " << marker_file;
+ }
+
+ return result;
+}
+
+bool HardwareChromeOS::CancelPowerwash() {
+ bool result = base::DeleteFile(base::FilePath(kPowerwashMarkerFile), false);
+
+ if (result) {
+ LOG(INFO) << "Successfully deleted the powerwash marker file : "
+ << marker_file;
+ } else {
+ PLOG(ERROR) << "Could not delete the powerwash marker file : "
+ << marker_file;
+ }
+
+ return result;
+}
+
bool HardwareChromeOS::GetNonVolatileDirectory(base::FilePath* path) const {
*path = base::FilePath(constants::kNonVolatileDirectory);
return true;