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libsnapshot: Propagate merge phase across merge failures.

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If a merge fails we write a new snapshot status indicating that the merge
failed. If this happens to occur during the second merge phase, we fail
to propagate the phase counter to the new status. This means the merge
is unlikely to make progress and succeed later.

Bug: 193549218
Test: manual test
Change-Id: I31fdae6bde48e3a71b6f3fcc663541257f7ebd8f
This commit is contained in:
David Anderson 2021-07-16 20:02:11 -07:00
parent 8b6dac42c9
commit c2bb3ee6d6
1 changed files with 1 additions and 0 deletions
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fs_mgr/libsnapshot/snapshot.cpp
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@ -2530,6 +2530,7 @@ bool SnapshotManager::WriteUpdateState(LockedFile* lock, UpdateState state,
SnapshotUpdateStatus old_status = ReadSnapshotUpdateStatus(lock);
status.set_compression_enabled(old_status.compression_enabled());
status.set_source_build_fingerprint(old_status.source_build_fingerprint());
status.set_merge_phase(old_status.merge_phase());
}
return WriteSnapshotUpdateStatus(lock, status);
}