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, unsigned int flags,
  16                 struct xfs_bmbt_irec *imap);
  17 int xfs_iomap_write_unwritten(struct xfs_inode *, xfs_off_t, xfs_off_t, bool);
  18 xfs_fileoff_t xfs_iomap_eof_align_last_fsb(struct xfs_inode *ip,
  19                 xfs_fileoff_t end_fsb);
  20
  21 int xfs_bmbt_to_iomap(struct xfs_inode *ip, struct iomap *iomap,
  22                 struct xfs_bmbt_irec *imap, unsigned int mapping_flags,
  23                 u16 iomap_flags);
  24
  25 int xfs_zero_range(struct xfs_inode *ip, loff_t pos, loff_t len,
  26                 bool *did_zero);
  27 int xfs_truncate_page(struct xfs_inode *ip, loff_t pos, bool *did_zero);
  28
  29 static inline xfs_filblks_t
  30 xfs_aligned_fsb_count(
  31         xfs_fileoff_t           offset_fsb,
  32         xfs_filblks_t           count_fsb,
  33         xfs_extlen_t            extsz)
  34 {
  35         if (extsz) {
  36                 xfs_extlen_t    align;
  37
  38                 div_u64_rem(offset_fsb, extsz, &align);
  39                 if (align)
  40                         count_fsb += align;
  41                 div_u64_rem(count_fsb, extsz, &align);
  42                 if (align)
  43                         count_fsb += extsz - align;
  44         }
  45
  46         return count_fsb;
  47 }
  48
  49 extern const struct iomap_ops xfs_buffered_write_iomap_ops;
  50 extern const struct iomap_ops xfs_direct_write_iomap_ops;
  51 extern const struct iomap_ops xfs_read_iomap_ops;
  52 extern const struct iomap_ops xfs_seek_iomap_ops;
  53 extern const struct iomap_ops xfs_xattr_iomap_ops;
  54
  55 #endif /* __XFS_IOMAP_H__*/