Zach Brown fbffad1d51 scoutfs: add initial lock write_version ...

We need a way to compare two items in different log btrees and learn
which is the most recent.  Each time we grant a new write lock we give
it a larger write version.  Items store the version of the lock they're
written under.  Readers can now easily see which item is newer.

This is a trivial initial implementation which is not consistent across
unmount or server failover.   We'll need to recover the greatest
write_version from locks during recovery and from log trees as the
server starts up.

Signed-off-by: Zach Brown <zab@versity.com>

2020-01-17 11:21:36 -08:00

kmod

scoutfs: add initial lock write_version

2020-01-17 11:21:36 -08:00

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