fs/xfs/xfs_exchrange.h

   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
  20 struct 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
  37 long xfs_ioc_exchange_range(struct file *file,
  38                 struct xfs_exchange_range __user *argp);
  39 long xfs_ioc_start_commit(struct file *file,
  40                 struct xfs_commit_range __user *argp);
  41 long xfs_ioc_commit_range(struct file *file,
  42                 struct xfs_commit_range __user  *argp);
  43
  44 struct xfs_exchmaps_req;
  45
  46 void xfs_exchrange_ilock(struct xfs_trans *tp, struct xfs_inode *ip1,
  47                 struct xfs_inode *ip2);
  48 void xfs_exchrange_iunlock(struct xfs_inode *ip1, struct xfs_inode *ip2);
  49
  50 int xfs_exchrange_estimate(struct xfs_exchmaps_req *req);
  51
  52 #endif /* __XFS_EXCHRANGE_H__ */