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Btrfs: fix unprotected device->bytes_used update

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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>
This commit is contained in:
Miao Xie 2014-09-03 21:35:36 +08:00 committed by Chris Mason
parent 5d778aaeb0
commit 43530c46cc
1 changed files with 3 additions and 1 deletions
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4
fs/btrfs/volumes.c
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@ -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;