From: Stefan Behrens Date: Tue, 7 May 2013 17:28:03 +0000 (+0000) Subject: Btrfs: don't allow device replace on RAID5/RAID6 X-Git-Tag: v3.10-rc2~7^2^2~17 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=49688107527a24b0ed3780576257a1225902180b;p=pandora-kernel.git Btrfs: don't allow device replace on RAID5/RAID6 This is not yet supported and causes crashes. One sad user reported that it destroyed his filesystem. One failure is in __btrfs_map_block+0xc1f calling kmalloc(0). 0x5f21f is in __btrfs_map_block (fs/btrfs/volumes.c:4923). 4918 num_stripes = map->num_stripes; 4919 max_errors = nr_parity_stripes(map); 4920 4921 raid_map = kmalloc(sizeof(u64) * num_stripes, 4922 GFP_NOFS); 4923 if (!raid_map) { 4924 ret = -ENOMEM; 4925 goto out; 4926 } 4927 There might be more issues. Until this is really tested, don't allow users to start the procedure on RAID5/RAID6 filesystems. Signed-off-by: Stefan Behrens Signed-off-by: Josef Bacik --- Reading git-diff-tree failed