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btrfs: disallow unequal data/metadata blocksize for mixed block groups 

With support for bigger metadata blocks, we must avoid mounting a
filesystem with different block size for mixed block groups, this causes
corruption (found by xfstests/083).

Signed-off-by: David Sterba <dsterba@suse.cz>
This commit is contained in:
David Sterba 2012-02-17 12:26:09 +01:00 committed by Chris Mason
parent fcd1f065da
commit 65139ed992
1 changed files with 8 additions and 0 deletions
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8
fs/btrfs/disk-io.c
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@ -2302,6 +2302,14 @@ int open_ctree(struct super_block *sb,
goto fail_sb_buffer;
}
if ((features & BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS) &&
(leafsize != nodesize || sectorsize != nodesize)) {
printk(KERN_WARNING "btrfs: unequal leaf/node/sector sizes "
"are not allowed for mixed block groups on %s\n",
sb->s_id);
goto fail_sb_buffer;
}
mutex_lock(&fs_info->chunk_mutex);
ret = btrfs_read_sys_array(tree_root);
mutex_unlock(&fs_info->chunk_mutex);