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| author | Nikos Tsironis <ntsironis@arrikto.com> | 2021-01-22 18:25:53 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-03-04 13:38:45 +0300 |
| commit | ede89488369d72be17f1e6e166ff053cc5e978af (patch) | |
| tree | 317af3f6a838c3e3281a1adaba98a0057da6ddbd /drivers/md/dm-era-target.c | |
| parent | e6039db4f1f1832dcba96d9feefc1bf5933dc9df (diff) | |
| download | linux-ede89488369d72be17f1e6e166ff053cc5e978af.tar.xz | |
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>
Diffstat (limited to 'drivers/md/dm-era-target.c')
| -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 62f679faf9e7..b0c4c80c0ee3 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); |