LXR linux/fs/xfs/xfs

   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
  11struct xfs_inode;
  12struct xfs_bmbt_irec;
  13
  14int xfs_iomap_write_direct(struct xfs_inode *ip, xfs_fileoff_t offset_fsb,
  15                xfs_fileoff_t count_fsb, struct xfs_bmbt_irec *imap);
  16int xfs_iomap_write_unwritten(struct xfs_inode *, xfs_off_t, xfs_off_t, bool);
  17xfs_fileoff_t xfs_iomap_eof_align_last_fsb(struct xfs_inode *ip,
  18                xfs_fileoff_t end_fsb);
  19
  20int xfs_bmbt_to_iomap(struct xfs_inode *, struct iomap *,
  21                struct xfs_bmbt_irec *, u16);
  22
  23static inline xfs_filblks_t
  24xfs_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
  43extern const struct iomap_ops xfs_buffered_write_iomap_ops;
  44extern const struct iomap_ops xfs_direct_write_iomap_ops;
  45extern const struct iomap_ops xfs_read_iomap_ops;
  46extern const struct iomap_ops xfs_seek_iomap_ops;
  47extern const struct iomap_ops xfs_xattr_iomap_ops;
  48
  49#endif /* __XFS_IOMAP_H__*/
  50