linux.git/fs/btrfs/dev-replace.c, branch v3.10

Btrfs: don't allow device replace on RAID5/RAID6

2013-05-18T01:40:16+00:00

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

Btrfs: check the return value of btrfs_start_delalloc_inodes()

2013-02-20T14:37:21+00:00

We forget to check the return value of btrfs_start_delalloc_inodes(), fix it.

Signed-off-by: Miao Xie 
Signed-off-by: Josef Bacik

Btrfs: add new sources for device replace code

2012-12-12T22:15:41+00:00

This adds a new file to the sources together with the header file
and the changes to ioctl.h and ctree.h that are required by the
new C source file. Additionally, 4 new functions are added to
volume.c that deal with device creation and destruction.

Signed-off-by: Stefan Behrens 
Signed-off-by: Chris Mason