From 57254b6ebce4ceca02d9c8b615f6059c56c19238 Mon Sep 17 00:00:00 2001 From: Jan Schmidt Date: Mon, 6 May 2013 19:14:17 +0000 Subject: 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 Signed-off-by: Josef Bacik --- fs/btrfs/ioctl.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'fs/btrfs/ioctl.c') diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c index 0f81d67..1e0dda1 100644 --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -3937,6 +3937,16 @@ static long btrfs_ioctl_quota_rescan_status(struct file *file, void __user *arg) return ret; } +static long btrfs_ioctl_quota_rescan_wait(struct file *file, void __user *arg) +{ + struct btrfs_root *root = BTRFS_I(fdentry(file)->d_inode)->root; + + if (!capable(CAP_SYS_ADMIN)) + return -EPERM; + + return btrfs_qgroup_wait_for_completion(root->fs_info); +} + static long btrfs_ioctl_set_received_subvol(struct file *file, void __user *arg) { @@ -4179,6 +4189,8 @@ long btrfs_ioctl(struct file *file, unsigned int return btrfs_ioctl_quota_rescan(file, argp); case BTRFS_IOC_QUOTA_RESCAN_STATUS: return btrfs_ioctl_quota_rescan_status(file, argp); + case BTRFS_IOC_QUOTA_RESCAN_WAIT: + return btrfs_ioctl_quota_rescan_wait(file, argp); case BTRFS_IOC_DEV_REPLACE: return btrfs_ioctl_dev_replace(root, argp); case BTRFS_IOC_GET_FSLABEL: -- cgit v1.1