[PATCH 0/3] xfs-4.19: fix bogus summary counters on mount

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Hi all,

This series enhances XFS' ability to detect and recover from obviously
incorrect summary counts.  Some of this is in response to recent bug
reports about xfs allowing mounts with obviously incorrect counts,
though the last two patches are intended to integrate with future online
fsck features.

The first patch detects obviously bad summary counters at mount time,
forces a recomputation of the counters after log recovery (if any)
completes, and fails the mount if the counts are still obviously bad.
The second and third patches deal with forcing a recalculation at the
next mount if the counts are found to be slightly incorrect, which is a
situation that will be detected by the fscounter online fsck in a
subsequent patch series.

This series sits on top of the cleanups I sent earlier today.

Comments and questions are, as always, welcome.

--D
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