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| author | Joe Thornber <ejt@redhat.com> | 2014-01-07 19:47:59 +0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-02-13 23:51:14 +0400 |
| commit | 11690e1491de3c35b09bff55336c14aacbdf1627 (patch) | |
| tree | 55d4879bb25d9455b1140b5c90d82caa3096e989 | |
| parent | 39bbeb69ace5742f3cbad2ae77c27bc2fa3c2c0f (diff) | |
| download | linux-11690e1491de3c35b09bff55336c14aacbdf1627.tar.xz | |
dm space map common: make sure new space is used during extend
commit 12c91a5c2d2a8e8cc40a9552313e1e7b0a2d9ee3 upstream.
When extending a low level space map we should update nr_blocks at
the start so the new space is used for the index entries.
Otherwise extend can fail, e.g.: sm_metadata_extend call sequence
that fails:
-> sm_ll_extend
-> dm_tm_new_block -> dm_sm_new_block -> sm_bootstrap_new_block
=> returns -ENOSPC because smm->begin == smm->ll.nr_blocks
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>
| -rw-r--r-- | drivers/md/persistent-data/dm-space-map-common.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/md/persistent-data/dm-space-map-common.c b/drivers/md/persistent-data/dm-space-map-common.c index ff3beed6ad2d..79c02d90ce39 100644 --- a/drivers/md/persistent-data/dm-space-map-common.c +++ b/drivers/md/persistent-data/dm-space-map-common.c @@ -244,6 +244,10 @@ int sm_ll_extend(struct ll_disk *ll, dm_block_t extra_blocks) return -EINVAL; } + /* + * We need to set this before the dm_tm_new_block() call below. + */ + ll->nr_blocks = nr_blocks; for (i = old_blocks; i < blocks; i++) { struct dm_block *b; struct disk_index_entry idx; @@ -251,6 +255,7 @@ int sm_ll_extend(struct ll_disk *ll, dm_block_t extra_blocks) r = dm_tm_new_block(ll->tm, &dm_sm_bitmap_validator, &b); if (r < 0) return r; + idx.blocknr = cpu_to_le64(dm_block_location(b)); r = dm_tm_unlock(ll->tm, b); @@ -265,7 +270,6 @@ int sm_ll_extend(struct ll_disk *ll, dm_block_t extra_blocks) return r; } - ll->nr_blocks = nr_blocks; return 0; } |