| From | Kamal Mostafa <> | Subject | [PATCH 3.8 038/166] dm thin: re-establish read-only state when switching to fail mode | Date | Wed, 15 Jan 2014 13:50:52 -0800 |
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3.8.13.16 -stable review patch. If anyone has any objections, please let me know.
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From: Joe Thornber <ejt@redhat.com>
commit 5383ef3a929a1366e2ced45cd6d74be7aa2a2281 upstream.
If the thin-pool transitioned to fail mode and the thin-pool's table were reloaded for some reason: the new table's default pool mode would be read-write, though it will transition to fail mode during resume.
When the pool mode transitions directly from PM_WRITE to PM_FAIL we need to re-establish the intermediate read-only state in both the metadata and persistent-data block manager (as is usually done with the normal pool mode transition sequence: PM_WRITE -> PM_READ_ONLY -> PM_FAIL).
Signed-off-by: Joe Thornber <ejt@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: Kamal Mostafa <kamal@canonical.com> --- drivers/md/dm-thin.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/drivers/md/dm-thin.c b/drivers/md/dm-thin.c index 7ac3dd4..bc7d4a3 100644 --- a/drivers/md/dm-thin.c +++ b/drivers/md/dm-thin.c @@ -1312,6 +1312,7 @@ static void set_pool_mode(struct pool *pool, enum pool_mode mode) switch (mode) { case PM_FAIL: DMERR("switching pool to failure mode"); + dm_pool_metadata_read_only(pool->pmd); pool->process_bio = process_bio_fail; pool->process_discard = process_bio_fail; pool->process_prepared_mapping = process_prepared_mapping_fail; -- 1.8.3.2
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