Btrfs: Add new ioctl to add devices
Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index ab707c0..1a74b50 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -3070,6 +3070,27 @@
return 0;
}
+long btrfs_ioctl_add_dev(struct btrfs_root *root, void __user *arg)
+{
+ struct btrfs_ioctl_vol_args *vol_args;
+ int ret;
+
+ vol_args = kmalloc(sizeof(*vol_args), GFP_NOFS);
+
+ if (!vol_args)
+ return -ENOMEM;
+
+ if (copy_from_user(vol_args, arg, sizeof(*vol_args))) {
+ ret = -EFAULT;
+ goto out;
+ }
+ ret = btrfs_init_new_device(root, vol_args->name);
+
+out:
+ kfree(vol_args);
+ return ret;
+}
+
long btrfs_ioctl(struct file *file, unsigned int
cmd, unsigned long arg)
{
@@ -3082,6 +3103,8 @@
return btrfs_ioctl_defrag(file);
case BTRFS_IOC_RESIZE:
return btrfs_ioctl_resize(root, (void __user *)arg);
+ case BTRFS_IOC_ADD_DEV:
+ return btrfs_ioctl_add_dev(root, (void __user *)arg);
}
return -ENOTTY;