btrfs: waiting on qgroup rescan should not always be interruptible

[cascardo/linux.git] / fs / btrfs / qgroup.c

diff --git a/fs/btrfs/qgroup.c b/fs/btrfs/qgroup.c
index 93ee1c1..13eb6a7 100644 (file)
--- a/fs/btrfs/qgroup.c
+++ b/fs/btrfs/qgroup.c
@@ -995,7 +995,7 @@ int btrfs_quota_disable(struct btrfs_trans_handle *trans,
                goto out;
        fs_info->quota_enabled = 0;
        fs_info->pending_quota_state = 0;
-       btrfs_qgroup_wait_for_completion(fs_info);
+       btrfs_qgroup_wait_for_completion(fs_info, false);
        spin_lock(&fs_info->qgroup_lock);
        quota_root = fs_info->quota_root;
        fs_info->quota_root = NULL;
@@ -2303,6 +2303,10 @@ static void btrfs_qgroup_rescan_worker(struct btrfs_work *work)
        int err = -ENOMEM;
        int ret = 0;
 
+       mutex_lock(&fs_info->qgroup_rescan_lock);
+       fs_info->qgroup_rescan_running = true;
+       mutex_unlock(&fs_info->qgroup_rescan_lock);
+
        path = btrfs_alloc_path();
        if (!path)
                goto out;
@@ -2369,6 +2373,9 @@ out:
        }
 
 done:
+       mutex_lock(&fs_info->qgroup_rescan_lock);
+       fs_info->qgroup_rescan_running = false;
+       mutex_unlock(&fs_info->qgroup_rescan_lock);
        complete_all(&fs_info->qgroup_rescan_completion);
 }
 
@@ -2487,20 +2494,26 @@ btrfs_qgroup_rescan(struct btrfs_fs_info *fs_info)
        return 0;
 }
 
-int btrfs_qgroup_wait_for_completion(struct btrfs_fs_info *fs_info)
+int btrfs_qgroup_wait_for_completion(struct btrfs_fs_info *fs_info,
+                                    bool interruptible)
 {
        int running;
        int ret = 0;
 
        mutex_lock(&fs_info->qgroup_rescan_lock);
        spin_lock(&fs_info->qgroup_lock);
-       running = fs_info->qgroup_flags & BTRFS_QGROUP_STATUS_FLAG_RESCAN;
+       running = fs_info->qgroup_rescan_running;
        spin_unlock(&fs_info->qgroup_lock);
        mutex_unlock(&fs_info->qgroup_rescan_lock);
 
-       if (running)
+       if (!running)
+               return 0;
+
+       if (interruptible)
                ret = wait_for_completion_interruptible(
                                        &fs_info->qgroup_rescan_completion);
+       else
+               wait_for_completion(&fs_info->qgroup_rescan_completion);
 
        return ret;
 }