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| author | Goldwyn Rodrigues <rgoldwyn@suse.com> | 2015-08-19 07:35:54 +1000 |
|---|---|---|
| committer | Goldwyn Rodrigues <rgoldwyn@suse.com> | 2015-10-12 01:31:33 -0500 |
| commit | 3c462c880b52aae2cfbbb8db8b401eef118cc128 (patch) | |
| tree | 47df3599c19db234cccf92933ab396926ee4b49b /drivers/md/bitmap.c | |
| parent | 9ed38ff53090856769b99e9d2f19740fb11e6956 (diff) | |
| download | linux-3c462c880b52aae2cfbbb8db8b401eef118cc128.tar.gz | |
md: Increment version for clustered bitmaps
Add BITMAP_MAJOR_CLUSTERED as 5, in order to prevent older kernels to assemble a clustered device. In order to maximize compatibility, the major version is set to BITMAP_MAJOR_CLUSTERED *only* if the bitmap is clustered. Added MD_FEATURE_CLUSTERED in order to return error for older kernels which would assemble MD even if the bitmap is corrupted. Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com> Signed-off-by: NeilBrown <neilb@suse.com>
Diffstat (limited to 'drivers/md/bitmap.c')
| -rw-r--r-- | drivers/md/bitmap.c | 10 |
1 files changed, 4 insertions, 6 deletions
diff --git a/drivers/md/bitmap.c b/drivers/md/bitmap.c index 48b5890c28e3..e9d3ee703e6d 100644 --- a/drivers/md/bitmap.c +++ b/drivers/md/bitmap.c @@ -613,12 +613,10 @@ re_read: daemon_sleep = le32_to_cpu(sb->daemon_sleep) * HZ; write_behind = le32_to_cpu(sb->write_behind); sectors_reserved = le32_to_cpu(sb->sectors_reserved); - /* XXX: This is a hack to ensure that we don't use clustering - * in case: - * - dm-raid is in use and - * - the nodes written in bitmap_sb is erroneous. + /* Setup nodes/clustername only if bitmap version is + * cluster-compatible */ - if (!bitmap->mddev->sync_super) { + if (sb->version == cpu_to_le32(BITMAP_MAJOR_CLUSTERED)) { nodes = le32_to_cpu(sb->nodes); strlcpy(bitmap->mddev->bitmap_info.cluster_name, sb->cluster_name, 64); @@ -628,7 +626,7 @@ re_read: if (sb->magic != cpu_to_le32(BITMAP_MAGIC)) reason = "bad magic"; else if (le32_to_cpu(sb->version) < BITMAP_MAJOR_LO || - le32_to_cpu(sb->version) > BITMAP_MAJOR_HI) + le32_to_cpu(sb->version) > BITMAP_MAJOR_CLUSTERED) reason = "unrecognized superblock version"; else if (chunksize < 512) reason = "bitmap chunksize too small"; |