dm thin: fix missing out-of-data-space to write mode transition if blocks are released

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Discard bios and thin device deletion have the potential to release data
blocks.  If the thin-pool is in out-of-data-space mode, and blocks were
released, transition the thin-pool back to full write mode.

The correct time to do this is just after the thin-pool metadata commit.
It cannot be done before the commit because the space maps will not
allow immediate reuse of the data blocks in case there's a rollback
following power failure.

Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Cc: stable@vger.kernel.org

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Joe Thornber 2014-12-11 11:12:19 +00:00 • committed by Mike Snitzer

parent 45ec9bd0fd

commit 2c43fd26e4

1 changed files with 20 additions and 2 deletions

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drivers/md/dm-thin.c

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