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| author | Jan Schmidt | 2013-05-06 21:14:17 +0200 |
|---|---|---|
| committer | Josef Bacik | 2013-06-14 17:29:22 +0200 |
| commit | 57254b6ebce4ceca02d9c8b615f6059c56c19238 (patch) | |
| tree | a90b04313e8671e6846d09c0c14c7b08e16d0e65 /fs/btrfs/qgroup.c | |
| parent | Btrfs: introduce qgroup_ulist to avoid frequently allocating/freeing ulist (diff) | |
| download | kernel-qcow2-linux-57254b6ebce4ceca02d9c8b615f6059c56c19238.tar.gz kernel-qcow2-linux-57254b6ebce4ceca02d9c8b615f6059c56c19238.tar.xz kernel-qcow2-linux-57254b6ebce4ceca02d9c8b615f6059c56c19238.zip | |
Btrfs: add ioctl to wait for qgroup rescan completion
btrfs_qgroup_wait_for_completion waits until the currently running qgroup
operation completes. It returns immediately when no rescan process is in
progress. This is useful to automate things around the rescan process (e.g.
testing).
Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Diffstat (limited to 'fs/btrfs/qgroup.c')
| -rw-r--r-- | fs/btrfs/qgroup.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/fs/btrfs/qgroup.c b/fs/btrfs/qgroup.c index 7f38cce2528d..d059d86c3131 100644 --- a/fs/btrfs/qgroup.c +++ b/fs/btrfs/qgroup.c @@ -2070,6 +2070,8 @@ out: } else { pr_err("btrfs: qgroup scan failed with %d\n", err); } + + complete_all(&fs_info->qgroup_rescan_completion); } static void @@ -2110,6 +2112,7 @@ btrfs_qgroup_rescan(struct btrfs_fs_info *fs_info) fs_info->qgroup_flags |= BTRFS_QGROUP_STATUS_FLAG_RESCAN; memset(&fs_info->qgroup_rescan_progress, 0, sizeof(fs_info->qgroup_rescan_progress)); + init_completion(&fs_info->qgroup_rescan_completion); /* clear all current qgroup tracking information */ for (n = rb_first(&fs_info->qgroup_tree); n; n = rb_next(n)) { @@ -2126,3 +2129,21 @@ btrfs_qgroup_rescan(struct btrfs_fs_info *fs_info) return 0; } + +int btrfs_qgroup_wait_for_completion(struct btrfs_fs_info *fs_info) +{ + 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; + spin_unlock(&fs_info->qgroup_lock); + mutex_unlock(&fs_info->qgroup_rescan_lock); + + if (running) + ret = wait_for_completion_interruptible( + &fs_info->qgroup_rescan_completion); + + return ret; +} |