update_engine: Add ping for DLCs in update_engine
Send ping to omaha with the metadata values 'active','date_last_active'
and 'date_last_rollcall'. Update engine resets the 'active' flag after
succesfully sending a ping to Omaha. The 'date_last_active' value is
sent and updated only when the DLC was active since the previous ping.
'date_last_rollcall' is sent on every ping.
BUG=chromium:912666
TEST=unittests
TEST=Test on DUT using Nebraska and forcing ping values by changing the
metadata files in /var/lib/dlc/dummy-dlc/.
Installed dlc using:dlcservice_util --dlc_ids="dummy-dlc" --install
Trigger the pings by calling: update_engine_client --check_for_update
Change-Id: I47eff8c7923f5b3a7e892c281933c9a12b619ee7
Reviewed-on: https://chromium-review.googlesource.com/c/aosp/platform/system/update_engine/+/2001095
Tested-by: Andrew Lassalle <andrewlassalle@chromium.org>
Commit-Queue: Andrew Lassalle <andrewlassalle@chromium.org>
Reviewed-by: Amin Hassani <ahassani@chromium.org>
diff --git a/common/constants.h b/common/constants.h
index 8685f7e..44b20b0 100644
--- a/common/constants.h
+++ b/common/constants.h
@@ -19,6 +19,10 @@
namespace chromeos_update_engine {
+// The root path of all DLC modules metadata.
+// Keep this in sync with the one in dlcservice.
+extern const char kDlcMetadataRootpath[];
+
// Directory for AU prefs that are preserved across powerwash.
extern const char kPowerwashSafePrefsSubDirectory[];
@@ -61,6 +65,9 @@
extern const char kPrefsP2PFirstAttemptTimestamp[];
extern const char kPrefsP2PNumAttempts[];
extern const char kPrefsPayloadAttemptNumber[];
+extern const char kPrefsPingActive[];
+extern const char kPrefsPingLastActive[];
+extern const char kPrefsPingLastRollcall[];
extern const char kPrefsPostInstallSucceeded[];
extern const char kPrefsPreviousVersion[];
extern const char kPrefsResumedUpdateFailures[];