commit ffbfdfb05d3ce4e9fe03aa103b63532870981771
author Marton Hunyady <hunyadym@chromium.org> Wed May 30 13:03:29 2018 +0200
committer chrome-bot <chrome-bot@chromium.org> Thu May 31 12:26:17 2018 -0700
tree 1b22f357c615eee2d7eea2055810d71ce1683dc9
parent a03026822db430d22d56982696deda1fd3168e6c

update_engine: Send UMA stats about kernel key versions

Adding the following UMA stats:
- UpdateEngine.KernelKey.MinVersion: Minimum kernel key version
  already set in the TPM.
- UpdateEngine.KernelKey.MaxRollforwardVersion: Maximum kernel key
  rollforward version set by update_engine.
- UpdateEngine.KernelKey.MaxRollforwardSetSuccess: Whether setting
  the maximum kernely key rollforward version succeeded.

Chromium CL of the new histograms: crrev.com/c/1078750

BUG=chromium:843622
TEST='cros_run_unit_tests --board=caroline --packages update_engine'

Change-Id: I14192b5ff9c07f8a003e0589450202f488cccc01
Reviewed-on: https://chromium-review.googlesource.com/1078968
Commit-Ready: Zentaro Kavanagh <zentaro@chromium.org>
Tested-by: Zentaro Kavanagh <zentaro@chromium.org>
Reviewed-by: Amin Hassani <ahassani@chromium.org>
Reviewed-by: Zentaro Kavanagh <zentaro@chromium.org>

metrics_reporter_interface.h

diff --git a/metrics_reporter_interface.h b/metrics_reporter_interface.h
index 8a7c864..85ffb85 100644
--- a/metrics_reporter_interface.h
+++ b/metrics_reporter_interface.h
@@ -214,6 +214,16 @@
   //
   // |kMetricAttemptInternalErrorCode|
   virtual void ReportInternalErrorCode(ErrorCode error_code) = 0;
+
+  // Helper function to report metrics related to the verified boot key
+  // versions:
+  //
+  //  |kMetricKernelMinVersion|
+  //  |kMetricKernelMaxRollforwardVersion|
+  //  |kMetricKernelMaxRollforwardSetSuccess|
+  virtual void ReportKeyVersionMetrics(int kernel_min_version,
+                                       int kernel_max_rollforward_version,
+                                       bool kernel_max_rollforward_success) = 0;
 };
 
 }  // namespace chromeos_update_engine