update_engine: Add support for enterprise rollback powerwash
- Adds the additional flag "rollback" to the powerwash file
- This flag allows additional data to be preserved over a powerwash
- Adds tests
BUG=chromium:881341
TEST=unittests
Change-Id: I4487f4de856ea8d2d0255e8de4cd1ba0762a8e53
Reviewed-on: https://chromium-review.googlesource.com/1412683
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Tested-by: Zentaro Kavanagh <zentaro@chromium.org>
Reviewed-by: Amin Hassani <ahassani@chromium.org>
Reviewed-by: Sen Jiang <senj@chromium.org>
diff --git a/hardware_chromeos.cc b/hardware_chromeos.cc
index c5933b5..8ef05b2 100644
--- a/hardware_chromeos.cc
+++ b/hardware_chromeos.cc
@@ -61,9 +61,13 @@
const char kPowerwashMarkerFile[] =
"/mnt/stateful_partition/factory_install_reset";
-// The contents of the powerwash marker file.
+// The contents of the powerwash marker file for the non-rollback case.
const char kPowerwashCommand[] = "safe fast keepimg reason=update_engine\n";
+// The contents of the powerwas marker file for the rollback case.
+const char kRollbackPowerwashCommand[] =
+ "safe fast keepimg rollback reason=update_engine\n";
+
// UpdateManager config path.
const char* kConfigFilePath = "/etc/update_manager.conf";
@@ -222,12 +226,15 @@
return powerwash_count;
}
-bool HardwareChromeOS::SchedulePowerwash() {
+bool HardwareChromeOS::SchedulePowerwash(bool is_rollback) {
+ const char* powerwash_command =
+ is_rollback ? kRollbackPowerwashCommand : kPowerwashCommand;
bool result = utils::WriteFile(
- kPowerwashMarkerFile, kPowerwashCommand, strlen(kPowerwashCommand));
+ kPowerwashMarkerFile, powerwash_command, strlen(powerwash_command));
if (result) {
LOG(INFO) << "Created " << kPowerwashMarkerFile
- << " to powerwash on next reboot";
+ << " to powerwash on next reboot (is_rollback=" << is_rollback
+ << ")";
} else {
PLOG(ERROR) << "Error in creating powerwash marker file: "
<< kPowerwashMarkerFile;