fs/xfs/xfs_iomap.h

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright (c) 2003-2005 Silicon Graphics, Inc.
   4  * All Rights Reserved.
   5  */
   6 #ifndef __XFS_IOMAP_H__
   7 #define __XFS_IOMAP_H__
   8
   9 #include <linux/iomap.h>
  10
  11 struct xfs_inode;
  12 struct xfs_bmbt_irec;
  13
  14 int xfs_iomap_write_direct(struct xfs_inode *, xfs_off_t, size_t,
  15                         struct xfs_bmbt_irec *, int);
  16 int xfs_iomap_write_unwritten(struct xfs_inode *, xfs_off_t, xfs_off_t, bool);
  17
  18 int xfs_bmbt_to_iomap(struct xfs_inode *, struct iomap *,
  19                 struct xfs_bmbt_irec *, bool shared);
  20 xfs_extlen_t xfs_eof_alignment(struct xfs_inode *ip, xfs_extlen_t extsize);
  21
  22 static inline xfs_filblks_t
  23 xfs_aligned_fsb_count(
  24         xfs_fileoff_t           offset_fsb,
  25         xfs_filblks_t           count_fsb,
  26         xfs_extlen_t            extsz)
  27 {
  28         if (extsz) {
  29                 xfs_extlen_t    align;
  30
  31                 div_u64_rem(offset_fsb, extsz, &align);
  32                 if (align)
  33                         count_fsb += align;
  34                 div_u64_rem(count_fsb, extsz, &align);
  35                 if (align)
  36                         count_fsb += extsz - align;
  37         }
  38
  39         return count_fsb;
  40 }
  41
  42 extern const struct iomap_ops xfs_iomap_ops;
  43 extern const struct iomap_ops xfs_seek_iomap_ops;
  44 extern const struct iomap_ops xfs_xattr_iomap_ops;
  45
  46 #endif /* __XFS_IOMAP_H__*/