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Commit 65139ed9 authored by David Sterba's avatar David Sterba Committed by Chris Mason
Browse files

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: default avatarDavid Sterba <dsterba@suse.cz>
parent fcd1f065

fs/btrfs/disk-io.c

+8 −0
Original line number Diff line number Diff line
@@ -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);