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authorJoe Thornber <ejt@redhat.com>2014-01-07 15:49:02 +0000
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2014-02-13 13:48:01 -0800
commitf15396a3699d02f863e80623e0771d3f95f08974 (patch)
treedf9e51bbd0545a42ff1a46a61efcae757304fe35 /drivers
parent247373410ad9f7f4dfc6a7a9c0bb4bcd0af59491 (diff)
downloadlinaro-lsk-f15396a3699d02f863e80623e0771d3f95f08974.tar.gz
dm space map metadata: fix extending the space map
commit 7e664b3dec431eebf0c5df5ff704d6197634cf35 upstream. When extending a metadata space map we should do the first commit whilst still in bootstrap mode -- a mode where all blocks get allocated in the new area. That way the commit overhead is allocated from the newly added space. Otherwise we risk running out of space. With this fix, and the previous commit "dm space map common: make sure new space is used during extend", the following device mapper testsuite test passes: dmtest run --suite thin-provisioning -n /resize_metadata_no_io/ Signed-off-by: Joe Thornber <ejt@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/md/persistent-data/dm-space-map-metadata.c18
1 files changed, 13 insertions, 5 deletions
diff --git a/drivers/md/persistent-data/dm-space-map-metadata.c b/drivers/md/persistent-data/dm-space-map-metadata.c
index 58fc1eef749..f04d92f313c 100644
--- a/drivers/md/persistent-data/dm-space-map-metadata.c
+++ b/drivers/md/persistent-data/dm-space-map-metadata.c
@@ -608,20 +608,28 @@ static int sm_metadata_extend(struct dm_space_map *sm, dm_block_t extra_blocks)
* Flick into a mode where all blocks get allocated in the new area.
*/
smm->begin = old_len;
- memcpy(&smm->sm, &bootstrap_ops, sizeof(smm->sm));
+ memcpy(sm, &bootstrap_ops, sizeof(*sm));
/*
* Extend.
*/
r = sm_ll_extend(&smm->ll, extra_blocks);
+ if (r)
+ goto out;
+
+ for (i = old_len; !r && i < smm->begin; i++) {
+ r = sm_ll_inc(&smm->ll, i, &ev);
+ if (r)
+ goto out;
+ }
+ r = sm_metadata_commit(sm);
+
+out:
/*
* Switch back to normal behaviour.
*/
- memcpy(&smm->sm, &ops, sizeof(smm->sm));
- for (i = old_len; !r && i < smm->begin; i++)
- r = sm_ll_inc(&smm->ll, i, &ev);
-
+ memcpy(sm, &ops, sizeof(*sm));
return r;
}