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| author |   Wang Shilong <wangsl.fnst@cn.fujitsu.com> | 2013-08-14 09:13:37 +0800 |
|---|---|---|
| committer |   Chris Mason <chris.mason@fusionio.com> | 2013-09-01 08:15:46 -0400 |
| commit | e685da14af6b31e4b336a110cb1bae1afc268be8 (patch) | |
| tree | e367ef4e9e61e5efcbb4a2f106144240bbd448ad /fs/btrfs/qgroup.c | |
| parent | Btrfs: fix oops when writing dirty qgroups to disk (diff) | |
| download | linux-dev-e685da14af6b31e4b336a110cb1bae1afc268be8.tar.xz linux-dev-e685da14af6b31e4b336a110cb1bae1afc268be8.zip | |
Btrfs: move btrfs_free_qgroup_config() out of spin_lock and fix comments
btrfs_free_qgroup_config() is not only called by open/close_ctree(),but
also btrfs_disable_quota().And for btrfs_disable_quota(),we have set
'quota_root' to be null before calling btrfs_free_qgroup_config(),so it
is safe to cleanup in-memory structures without lock held.
Signed-off-by: Wang Shilong <wangsl.fnst@cn.fujitsu.com>
Reviewed-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
Diffstat (limited to 'fs/btrfs/qgroup.c')
| -rw-r--r-- | fs/btrfs/qgroup.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/fs/btrfs/qgroup.c b/fs/btrfs/qgroup.c index 57b9805873f7..01eeffe9ae53 100644 --- a/fs/btrfs/qgroup.c +++ b/fs/btrfs/qgroup.c @@ -432,8 +432,10 @@ out: } /* - * This is only called from close_ctree() or open_ctree(), both in single- - * treaded paths. Clean up the in-memory structures. No locking needed. + * This is called from close_ctree() or open_ctree() or btrfs_quota_disable(), + * first two are in single-threaded paths.And for the third one, we have set + * quota_root to be null with qgroup_lock held before, so it is safe to clean + * up the in-memory structures without qgroup_lock held. */ void btrfs_free_qgroup_config(struct btrfs_fs_info *fs_info) { @@ -937,9 +939,10 @@ int btrfs_quota_disable(struct btrfs_trans_handle *trans, fs_info->pending_quota_state = 0; quota_root = fs_info->quota_root; fs_info->quota_root = NULL; - btrfs_free_qgroup_config(fs_info); spin_unlock(&fs_info->qgroup_lock); + btrfs_free_qgroup_config(fs_info); + if (!quota_root) { ret = -EINVAL; goto out; |