release/src-rt-6.x.4708/linux/linux-2.6.36/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 /* base extent manipulation calls */
  22 #define BMAPI_READ      (1 << 0)        /* read extents */
  23 #define BMAPI_WRITE     (1 << 1)        /* create extents */
  24 #define BMAPI_ALLOCATE  (1 << 2)        /* delayed allocate to real extents */
  25
  26 /* modifiers */
  27 #define BMAPI_IGNSTATE  (1 << 4)        /* ignore unwritten state on read */
  28 #define BMAPI_DIRECT    (1 << 5)        /* direct instead of buffered write */
  29 #define BMAPI_MMA       (1 << 6)        /* allocate for mmap write */
  30 #define BMAPI_TRYLOCK   (1 << 7)        /* non-blocking request */
  31
  32 #define BMAPI_FLAGS \
  33         { BMAPI_READ,           "READ" }, \
  34         { BMAPI_WRITE,          "WRITE" }, \
  35         { BMAPI_ALLOCATE,       "ALLOCATE" }, \
  36         { BMAPI_IGNSTATE,       "IGNSTATE" }, \
  37         { BMAPI_DIRECT,         "DIRECT" }, \
  38         { BMAPI_TRYLOCK,        "TRYLOCK" }
  39
  40 struct xfs_inode;
  41 struct xfs_bmbt_irec;
  42
  43 extern int xfs_iomap(struct xfs_inode *, xfs_off_t, ssize_t, int,
  44                      struct xfs_bmbt_irec *, int *, int *);
  45 extern int xfs_iomap_write_unwritten(struct xfs_inode *, xfs_off_t, size_t);
  46
  47 #endif /* __XFS_IOMAP_H__*/