nfs42: add NFS_IOC_CLONE_RANGE ioctl
It follows btrfs BTRFS_IOC_CLONE_RANGE lead on ioctl number and
arguments.
Signed-off-by: Peng Tao <tao.peng@primarydata.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
diff --git a/fs/nfs/nfs4file.c b/fs/nfs/nfs4file.c
index 4f463dd..4384a1d 100644
--- a/fs/nfs/nfs4file.c
+++ b/fs/nfs/nfs4file.c
@@ -288,14 +288,28 @@
mnt_drop_write_file(dst_file);
return ret;
}
+
+static long nfs42_ioctl_clone_range(struct file *dst_file, void __user *argp)
+{
+ struct nfs_ioctl_clone_range_args args;
+
+ if (copy_from_user(&args, argp, sizeof(args)))
+ return -EFAULT;
+
+ return nfs42_ioctl_clone(dst_file, args.src_fd, args.src_off, args.dst_off, args.count);
+}
#endif /* CONFIG_NFS_V4_2 */
long nfs4_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
+ void __user *argp = (void __user *)arg;
+
switch (cmd) {
#ifdef CONFIG_NFS_V4_2
case NFS_IOC_CLONE:
return nfs42_ioctl_clone(file, arg, 0, 0, 0);
+ case NFS_IOC_CLONE_RANGE:
+ return nfs42_ioctl_clone_range(file, argp);
#endif
}