Btrfs: introduce a mutex lock for btrfs quota operations

[cascardo/linux.git] / fs / btrfs / ctree.h

diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 075a8a0..1a85040 100644 (file)
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -1583,6 +1583,9 @@ struct btrfs_fs_info {
        struct rb_root qgroup_tree;
        spinlock_t qgroup_lock;
 
+       /* protect user change for quota operations */
+       struct mutex qgroup_ioctl_lock;
+
        /* list of dirty qgroups to be written at next commit */
        struct list_head dirty_qgroups;