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nfs: use btrfs ioctl defintions for clone 

The NFS CLONE_RANGE defintion was wrong and thus never worked.  Fix this
by simply using the btrfs ioctl defintion.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
This commit is contained in:
Christoph Hellwig 2015-11-13 09:38:48 +01:00 committed by Trond Myklebust
parent 21fad313d5
commit 0f42a6a9b8
2 changed files with 6 additions and 15 deletions
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10
fs/nfs/nfs4file.c
View File

@ -7,6 +7,7 @@
#include <linux/file.h>
#include <linux/falloc.h>
#include <linux/nfs_fs.h>
#include <uapi/linux/btrfs.h> /* BTRFS_IOC_CLONE/BTRFS_IOC_CLONE_RANGE */
#include "delegation.h"
#include "internal.h"
#include "iostat.h"
@ -300,12 +301,13 @@ out_drop_write:
static long nfs42_ioctl_clone_range(struct file *dst_file, void __user *argp)
{
struct nfs_ioctl_clone_range_args args;
struct btrfs_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);
return nfs42_ioctl_clone(dst_file, args.src_fd, args.src_offset,
args.dest_offset, args.src_length);
}
#else
static long nfs42_ioctl_clone(struct file *dst_file, unsigned long srcfd,
@ -325,9 +327,9 @@ long nfs4_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
void __user *argp = (void __user *)arg;
switch (cmd) {
case NFS_IOC_CLONE:
case BTRFS_IOC_CLONE:
return nfs42_ioctl_clone(file, arg, 0, 0, 0);
case NFS_IOC_CLONE_RANGE:
case BTRFS_IOC_CLONE_RANGE:
return nfs42_ioctl_clone_range(file, argp);
}

11
include/uapi/linux/nfs.h
View File

@ -33,17 +33,6 @@
#define NFS_PIPE_DIRNAME "nfs"
/* 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_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
* a superset of NFSv2 errors (with the exception of NFSERR_WFLUSH which