From: Mike Snitzer <snitzer@xxxxxxxxxx>
3.12-stable review patch. If anyone has any objections, please let me know.
===============
commit 1acacc0784aab45627b6009e0e9224886279ac0b upstream.
dm_pool_close_thin_device() must be called if dm_set_target_max_io_len()
fails in thin_ctr(). Otherwise __pool_destroy() will fail because the
pool will still have an open thin device:
device-mapper: thin metadata: attempt to close pmd when 1 device(s) are still open
device-mapper: thin: __pool_destroy: dm_pool_metadata_close() failed.
Also, must establish error code if failing thin_ctr() because the pool
is in fail_io mode.
Signed-off-by: Mike Snitzer <snitzer@xxxxxxxxxx>
Acked-by: Joe Thornber <ejt@xxxxxxxxxx>
Signed-off-by: Jiri Slaby <jslaby@xxxxxxx>
---
drivers/md/dm-thin.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/md/dm-thin.c b/drivers/md/dm-thin.c
index f406b0168962..e9587101b04f 100644
--- a/drivers/md/dm-thin.c
+++ b/drivers/md/dm-thin.c
@@ -2848,6 +2848,7 @@ static int thin_ctr(struct dm_target *ti, unsigned argc, char **argv)
if (get_pool_mode(tc->pool) == PM_FAIL) {
ti->error = "Couldn't open thin device, Pool is in fail mode";
+ r = -EINVAL;
goto bad_thin_open;
}
@@ -2859,7 +2860,7 @@ static int thin_ctr(struct dm_target *ti, unsigned argc, char **argv)
r = dm_set_target_max_io_len(ti, tc->pool->sectors_per_block);
if (r)
- goto bad_thin_open;
+ goto bad_target_max_io_len;
ti->num_flush_bios = 1;
ti->flush_supported = true;
@@ -2880,6 +2881,8 @@ static int thin_ctr(struct dm_target *ti, unsigned argc, char **argv)
return 0;
+bad_target_max_io_len:
+ dm_pool_close_thin_device(tc->td);
bad_thin_open:
__pool_dec(tc->pool);
bad_pool_lookup:
--
1.9.0
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