diff options
| author | Miao Xie <miaox@cn.fujitsu.com> | 2014-09-03 17:35:36 +0400 |
|---|---|---|
| committer | Chris Mason <clm@fb.com> | 2014-09-18 00:38:36 +0400 |
| commit | 43530c46cc55cf5a381e788276a93c83cbc95e46 (patch) | |
| tree | ecce232a9383ebf44df78e5e677a1861acd3a4fc /fs/btrfs/volumes.c | |
| parent | 5d778aaeb013bf819d00e33de7c673c04b5c4886 (diff) | |
| download | linux-43530c46cc55cf5a381e788276a93c83cbc95e46.tar.xz | |
Btrfs: fix unprotected device->bytes_used update
We should update device->bytes_used in the lock context of
chunk_mutex, or we would get wrong data.
Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Chris Mason <clm@fb.com>
Diffstat (limited to 'fs/btrfs/volumes.c')
| -rw-r--r-- | fs/btrfs/volumes.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index 1524b3f44036..45e0b5d0f6dd 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -4429,6 +4429,9 @@ static int __btrfs_alloc_chunk(struct btrfs_trans_handle *trans, if (ret) goto error_del_extent; + for (i = 0; i < map->num_stripes; i++) + map->stripes[i].dev->bytes_used += stripe_size; + free_extent_map(em); check_raid56_incompat_flag(extent_root->fs_info, type); @@ -4500,7 +4503,6 @@ int btrfs_finish_chunk_alloc(struct btrfs_trans_handle *trans, device = map->stripes[i].dev; dev_offset = map->stripes[i].physical; - device->bytes_used += stripe_size; ret = btrfs_update_device(trans, device); if (ret) goto out; |