diff options
author | Nikos Tsironis <ntsironis@arrikto.com> | 2021-01-22 17:25:53 +0200 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-03-03 16:44:23 +0100 |
commit | 06a7ca6fa81b91d643c6bce345855e2061e5ecb6 (patch) | |
tree | 09cd463a5e6ff763aff1b910b91e02055a6ee299 | |
parent | de3de7196c5bff14e320953d1b50b7c39c8d5061 (diff) |
dm era: Verify the data block size hasn't changed
commit c8e846ff93d5eaa5384f6f325a1687ac5921aade upstream.
dm-era doesn't support changing the data block size of existing devices,
so check explicitly that the requested block size for a new target
matches the one stored in the metadata.
Fixes: eec40579d84873 ("dm: add era target")
Cc: stable@vger.kernel.org # v3.15+
Signed-off-by: Nikos Tsironis <ntsironis@arrikto.com>
Reviewed-by: Ming-Hung Tsai <mtsai@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r-- | drivers/md/dm-era-target.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/drivers/md/dm-era-target.c b/drivers/md/dm-era-target.c index 95ac9346540c..2d0e86f40b7e 100644 --- a/drivers/md/dm-era-target.c +++ b/drivers/md/dm-era-target.c @@ -564,6 +564,15 @@ static int open_metadata(struct era_metadata *md) } disk = dm_block_data(sblock); + + /* Verify the data block size hasn't changed */ + if (le32_to_cpu(disk->data_block_size) != md->block_size) { + DMERR("changing the data block size (from %u to %llu) is not supported", + le32_to_cpu(disk->data_block_size), md->block_size); + r = -EINVAL; + goto bad; + } + r = dm_tm_open_with_sm(md->bm, SUPERBLOCK_LOCATION, disk->metadata_space_map_root, sizeof(disk->metadata_space_map_root), @@ -575,7 +584,6 @@ static int open_metadata(struct era_metadata *md) setup_infos(md); - md->block_size = le32_to_cpu(disk->data_block_size); md->nr_blocks = le32_to_cpu(disk->nr_blocks); md->current_era = le32_to_cpu(disk->current_era); |