1/* SPDX-License-Identifier: GPL-2.0-or-later */
 2/*
 3 * Copyright (c) 2020-2024 Oracle.  All Rights Reserved.
 4 * Author: Darrick J. Wong <djwong@kernel.org>
 5 */
 6#ifndef __XFS_EXCHRANGE_H__
 7#define __XFS_EXCHRANGE_H__
 8
 9/* Update the mtime/cmtime of file1 and file2 */
10#define __XFS_EXCHANGE_RANGE_UPD_CMTIME1	(1ULL << 63)
11#define __XFS_EXCHANGE_RANGE_UPD_CMTIME2	(1ULL << 62)
12
13/* Freshness check required */
14#define __XFS_EXCHANGE_RANGE_CHECK_FRESH2	(1ULL << 61)
15
16#define XFS_EXCHANGE_RANGE_PRIV_FLAGS	(__XFS_EXCHANGE_RANGE_UPD_CMTIME1 | \
17					 __XFS_EXCHANGE_RANGE_UPD_CMTIME2 | \
18					 __XFS_EXCHANGE_RANGE_CHECK_FRESH2)
19
20struct xfs_exchrange {
21	struct file		*file1;
22	struct file		*file2;
23
24	loff_t			file1_offset;
25	loff_t			file2_offset;
26	u64			length;
27
28	u64			flags;	/* XFS_EXCHANGE_RANGE flags */
29
30	/* file2 metadata for freshness checks */
31	u64			file2_ino;
32	struct timespec64	file2_mtime;
33	struct timespec64	file2_ctime;
34	u32			file2_gen;
35};
36
37long xfs_ioc_exchange_range(struct file *file,
38		struct xfs_exchange_range __user *argp);
39long xfs_ioc_start_commit(struct file *file,
40		struct xfs_commit_range __user *argp);
41long xfs_ioc_commit_range(struct file *file,
42		struct xfs_commit_range __user	*argp);
43
44struct xfs_exchmaps_req;
45
46void xfs_exchrange_ilock(struct xfs_trans *tp, struct xfs_inode *ip1,
47		struct xfs_inode *ip2);
48void xfs_exchrange_iunlock(struct xfs_inode *ip1, struct xfs_inode *ip2);
49
50int xfs_exchrange_estimate(struct xfs_exchmaps_req *req);
51
52#endif /* __XFS_EXCHRANGE_H__ */