From 7708f029dca5f1b9e9d6ea01ab10cd83e4c74ff2 Mon Sep 17 00:00:00 2001 From: Wang Shilong Date: Sun, 7 Apr 2013 10:24:57 +0000 Subject: Btrfs: creating the subvolume qgroup automatically when enabling quota Creating the subvolume/snapshots(including root subvolume) qgroup auotomatically when enabling quota. Signed-off-by: Wang Shilong Reviewed-by: Miao Xie Signed-off-by: Josef Bacik --- fs/btrfs/ioctl.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'fs/btrfs/ioctl.c') diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c index 9c44d657b795..4fc9751d2e0c 100644 --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -3697,6 +3697,7 @@ static long btrfs_ioctl_quota_ctl(struct file *file, void __user *arg) goto drop_write; } + down_write(&root->fs_info->subvol_sem); if (sa->cmd != BTRFS_QUOTA_CTL_RESCAN) { trans = btrfs_start_transaction(root, 2); if (IS_ERR(trans)) { @@ -3730,6 +3731,7 @@ static long btrfs_ioctl_quota_ctl(struct file *file, void __user *arg) } out: kfree(sa); + up_write(&root->fs_info->subvol_sem); drop_write: mnt_drop_write_file(file); return ret; -- cgit v1.2.3