[PATCH v2 0/8] nfs: minor cleanups and NFSv42 CLONE support

[Peng Tao <tao.peng@primarydata.com>]

Hi all,

The first two patches are minor cleanups. The rest 6 added NFSv42 CLONE support via
a new ioctl interface. There's a minor conflict between the cleanup and new functionality.
So I ended up sending them together.

Tested with following program as well as `cp --reflink=always`.

Cheers,
Tao

v1->v2 changelog:
1. change NFS_IOC_CLONE definition to match BTRFS_IOC_CLONE
2. add NFS_IOC_CLONE_RANGE that is same as BTRFS_IOC_RANGE

[lear@tests]$cat copy_reflink.c
#include <sys/ioctl.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>

void usage(const char *cmd)
{
	printf("%s: <src_file_name> <dst_file_name>\n", cmd);
}

int main(char argc, char** argv)
{
	int srcfd, dstfd;

	if (argc < 3) {
		usage(argv[0]);
		return -1;
	}

	srcfd = open(argv[1], O_RDONLY);
	if (srcfd < 0) {
		perror("open failed");
		return -1;
	}
	dstfd = open(argv[2], O_WRONLY|O_CREAT, 0644);
	if (dstfd < 0) {
		perror("open failed");
		return -1;
	}

#ifndef NFS_IOC_CLONE
#define NFS_IOC_CLONE _IOW(0x94, 9, int)
#endif
	if (ioctl(dstfd, NFS_IOC_CLONE, srcfd) < 0)
		perror("ioctl CLONE failed\n");

	close(srcfd);
	close(dstfd);
	return 0;
}


Peng Tao (8):
  nfs42: decode_layoutstats does not need res parameter
  nfs42: remove unused declaration
  nfs42: add CLONE xdr functions
  nfs42: add CLONE proc functions
  nfs42: add NFS_IOC_CLONE ioctl
  nfs: get clone_blksize when probing fsinfo
  nfs42: respect clone_blksize
  nfs42: add NFS_IOC_CLONE_RANGE ioctl

 fs/nfs/client.c           |   1 +
 fs/nfs/nfs42.h            |   3 +-
 fs/nfs/nfs42proc.c        |  71 ++++++++++++++++++++++++++
 fs/nfs/nfs42xdr.c         | 102 +++++++++++++++++++++++++++++++++++--
 fs/nfs/nfs4file.c         | 127 ++++++++++++++++++++++++++++++++++++++++++++++
 fs/nfs/nfs4proc.c         |   4 +-
 fs/nfs/nfs4xdr.c          |  26 ++++++++++
 include/linux/nfs4.h      |   3 ++
 include/linux/nfs_fs_sb.h |   2 +
 include/linux/nfs_xdr.h   |  20 ++++++++
 include/uapi/linux/nfs.h  |  11 ++++
 11 files changed, 363 insertions(+), 7 deletions(-)

-- 
1.8.3.1