fs/xfs/xfs_iomap.h

   1 /*
   2  * Copyright (c) 2003-2005 Silicon Graphics, Inc.
   3  * All Rights Reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it would be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write the Free Software Foundation,
  16  * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  17  */
  18 #ifndef __XFS_IOMAP_H__
  19 #define __XFS_IOMAP_H__
  20
  21 #include <linux/iomap.h>
  22
  23 struct xfs_inode;
  24 struct xfs_bmbt_irec;
  25
  26 int xfs_iomap_write_direct(struct xfs_inode *, xfs_off_t, size_t,
  27                         struct xfs_bmbt_irec *, int);
  28 int xfs_iomap_write_allocate(struct xfs_inode *, int, xfs_off_t,
  29                         struct xfs_bmbt_irec *);
  30 int xfs_iomap_write_unwritten(struct xfs_inode *, xfs_off_t, xfs_off_t);
  31
  32 void xfs_bmbt_to_iomap(struct xfs_inode *, struct iomap *,
  33                 struct xfs_bmbt_irec *);
  34 xfs_extlen_t xfs_eof_alignment(struct xfs_inode *ip, xfs_extlen_t extsize);
  35
  36 static inline xfs_filblks_t
  37 xfs_aligned_fsb_count(
  38         xfs_fileoff_t           offset_fsb,
  39         xfs_filblks_t           count_fsb,
  40         xfs_extlen_t            extsz)
  41 {
  42         if (extsz) {
  43                 xfs_extlen_t    align;
  44
  45                 align = do_mod(offset_fsb, extsz);
  46                 if (align)
  47                         count_fsb += align;
  48                 align = do_mod(count_fsb, extsz);
  49                 if (align)
  50                         count_fsb += extsz - align;
  51         }
  52
  53         return count_fsb;
  54 }
  55
  56 extern const struct iomap_ops xfs_iomap_ops;
  57 extern const struct iomap_ops xfs_xattr_iomap_ops;
  58
  59 #endif /* __XFS_IOMAP_H__*/