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 *ip, xfs_fileoff_t offset_fsb,
  15                 xfs_fileoff_t count_fsb, struct xfs_bmbt_irec *imap);
  16 int xfs_iomap_write_unwritten(struct xfs_inode *, xfs_off_t, xfs_off_t, bool);
  17 xfs_fileoff_t xfs_iomap_eof_align_last_fsb(struct xfs_inode *ip,
  18                 xfs_fileoff_t end_fsb);
  19
  20 int xfs_bmbt_to_iomap(struct xfs_inode *, struct iomap *,
  21                 struct xfs_bmbt_irec *, u16);
  22
  23 static inline xfs_filblks_t
  24 xfs_aligned_fsb_count(
  25         xfs_fileoff_t           offset_fsb,
  26         xfs_filblks_t           count_fsb,
  27         xfs_extlen_t            extsz)
  28 {
  29         if (extsz) {
  30                 xfs_extlen_t    align;
  31
  32                 div_u64_rem(offset_fsb, extsz, &align);
  33                 if (align)
  34                         count_fsb += align;
  35                 div_u64_rem(count_fsb, extsz, &align);
  36                 if (align)
  37                         count_fsb += extsz - align;
  38         }
  39
  40         return count_fsb;
  41 }
  42
  43 extern const struct iomap_ops xfs_buffered_write_iomap_ops;
  44 extern const struct iomap_ops xfs_direct_write_iomap_ops;
  45 extern const struct iomap_ops xfs_read_iomap_ops;
  46 extern const struct iomap_ops xfs_seek_iomap_ops;
  47 extern const struct iomap_ops xfs_xattr_iomap_ops;
  48
  49 #endif /* __XFS_IOMAP_H__*/