Return-Path: Received: from mail-pa0-f46.google.com ([209.85.220.46]:33551 "EHLO mail-pa0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751451AbbGMJHf (ORCPT ); Mon, 13 Jul 2015 05:07:35 -0400 Received: by padck2 with SMTP id ck2so39614322pad.0 for ; Mon, 13 Jul 2015 02:07:34 -0700 (PDT) From: Peng Tao To: linux-nfs@vger.kernel.org Cc: Trond Myklebust , Anna Schumaker , Peng Tao Subject: [PATCH v2 8/8] nfs42: add NFS_IOC_CLONE_RANGE ioctl Date: Mon, 13 Jul 2015 17:06:08 +0800 Message-Id: <1436778368-65447-9-git-send-email-tao.peng@primarydata.com> In-Reply-To: <1436778368-65447-1-git-send-email-tao.peng@primarydata.com> References: <1436778368-65447-1-git-send-email-tao.peng@primarydata.com> Sender: linux-nfs-owner@vger.kernel.org List-ID: It follows btrfs BTRFS_IOC_CLONE_RANGE lead on ioctl number and arguments. Signed-off-by: Peng Tao --- fs/nfs/nfs4file.c | 14 ++++++++++++++ include/uapi/linux/nfs.h | 9 ++++++++- 2 files changed, 22 insertions(+), 1 deletion(-) diff --git a/fs/nfs/nfs4file.c b/fs/nfs/nfs4file.c index e450a5f..f37b74c 100644 --- a/fs/nfs/nfs4file.c +++ b/fs/nfs/nfs4file.c @@ -262,14 +262,28 @@ out_drop_write: 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 } diff --git a/include/uapi/linux/nfs.h b/include/uapi/linux/nfs.h index d85748d..c6b86cc 100644 --- a/include/uapi/linux/nfs.h +++ b/include/uapi/linux/nfs.h @@ -33,7 +33,14 @@ /* NFS ioctls */ /* Let's follow btrfs lead on CLONE to avoid messing userspace */ -#define NFS_IOC_CLONE _IOW(0x94, 9, int) +#define NFS_IOC_CLONE _IOW(0x94, 9, int) +#define NFS_IOC_CLONE_RANGE _IOW(0x94, 13, int) + +struct nfs_ioctl_clone_range_args { + __s64 src_fd; + __u64 src_off, count; + __u64 dst_off; +}; /* * NFS stats. The good thing with these values is that NFSv3 errors are -- 1.8.3.1