Btrfs: Add basic lockfs calls

Signed-off-by: Chris Mason <chris.mason@oracle.com>

1 files changed, 13 insertions, 1 deletions

diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index b6982f0133cf..8b52c69fda2e 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -429,6 +429,17 @@ static struct file_system_type btrfs_fs_type = {
         .kill_sb        = kill_block_super,
         .fs_flags       = FS_REQUIRES_DEV,
 };
+static void btrfs_write_super_lockfs(struct super_block *sb)
+{
+        struct btrfs_root *root = btrfs_sb(sb);
+        btrfs_transaction_flush_work(root);
+}
+
+static void btrfs_unlockfs(struct super_block *sb)
+{
+        struct btrfs_root *root = btrfs_sb(sb);
+        btrfs_transaction_queue_work(root, HZ * 30);
+}
 
 static struct super_operations btrfs_super_ops = {
         .delete_inode   = btrfs_delete_inode,
@@ -442,8 +453,9 @@ static struct super_operations btrfs_super_ops = {
         .alloc_inode    = btrfs_alloc_inode,
         .destroy_inode  = btrfs_destroy_inode,
         .statfs         = btrfs_statfs,
+        .write_super_lockfs = btrfs_write_super_lockfs,
+        .unlockfs       = btrfs_unlockfs,
 };
-
 static int __init init_btrfs_fs(void)
 {
         int err;