diff options
| author | Joe Thornber <ejt@redhat.com> | 2013-12-04 22:58:19 +0100 |
|---|---|---|
| committer | Mike Snitzer <snitzer@redhat.com> | 2013-12-10 22:35:13 +0100 |
| commit | 9b7aaa64f96f7ca280d75326fca42f42017b89ef (patch) | |
| tree | a0028aeb56bc229e9bc7b1dfcecbb3f03d213131 /drivers/md/dm-thin-metadata.c | |
| parent | dm thin: re-establish read-only state when switching to fail mode (diff) | |
| download | linux-9b7aaa64f96f7ca280d75326fca42f42017b89ef.tar.xz linux-9b7aaa64f96f7ca280d75326fca42f42017b89ef.zip | |
dm thin: allow pool in read-only mode to transition to read-write mode
A thin-pool may be in read-only mode because the pool's data or metadata
space was exhausted. To allow for recovery, by adding more space to the
pool, we must allow a pool to transition from PM_READ_ONLY to PM_WRITE
mode. Otherwise, running out of space will render the pool permanently
read-only.
Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Cc: stable@vger.kernel.org
Diffstat (limited to 'drivers/md/dm-thin-metadata.c')
| -rw-r--r-- | drivers/md/dm-thin-metadata.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/md/dm-thin-metadata.c b/drivers/md/dm-thin-metadata.c index 60bce435f4fa..8a30ad54bd46 100644 --- a/drivers/md/dm-thin-metadata.c +++ b/drivers/md/dm-thin-metadata.c @@ -1697,6 +1697,14 @@ void dm_pool_metadata_read_only(struct dm_pool_metadata *pmd) up_write(&pmd->root_lock); } +void dm_pool_metadata_read_write(struct dm_pool_metadata *pmd) +{ + down_write(&pmd->root_lock); + pmd->read_only = false; + dm_bm_set_read_write(pmd->bm); + up_write(&pmd->root_lock); +} + int dm_pool_register_metadata_threshold(struct dm_pool_metadata *pmd, dm_block_t threshold, dm_sm_threshold_fn fn, |