Btrfs: allow running defrag in parallel to administrative tasks

Commit 5ac00add added a testnset mutex and code that disallows
running administrative tasks in parallel. It is prevented that
the device add/delete/balance/replace/resize operations are
started in parallel. By mistake, the defragmentation operation
was included in the check for mutually exclusiveness as well.
This is fixed with this commit.

Signed-off-by: Stefan Behrens <sbehrens@giantdisaster.de>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>

diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index 3fdfabcc1aaa7778cf178c0fed945a58059edb2b..898c5729e7e5300ba7c069ef175a21880a163347 100644 (file)
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -2245,13 +2245,6 @@ static int btrfs_ioctl_defrag(struct file *file, void __user *argp)
        if (ret)
                return ret;
 
-       if (atomic_xchg(&root->fs_info->mutually_exclusive_operation_running,
-                       1)) {
-               pr_info("btrfs: dev add/delete/balance/replace/resize operation in progress\n");
-               mnt_drop_write_file(file);
-               return -EINVAL;
-       }
-
        if (btrfs_root_readonly(root)) {
                ret = -EROFS;
                goto out;
@@ -2306,7 +2299,6 @@ static int btrfs_ioctl_defrag(struct file *file, void __user *argp)
                ret = -EINVAL;
        }
 out:
-       atomic_set(&root->fs_info->mutually_exclusive_operation_running, 0);
        mnt_drop_write_file(file);
        return ret;
 }