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 typedef enum {
  22         /* base extent manipulation calls */
  23         BMAPI_READ = (1 << 0),          /* read extents */
  24         BMAPI_WRITE = (1 << 1),         /* create extents */
  25         BMAPI_ALLOCATE = (1 << 2),      /* delayed allocate to real extents */
  26         /* modifiers */
  27         BMAPI_IGNSTATE = (1 << 4),      /* ignore unwritten state on read */
  28         BMAPI_DIRECT = (1 << 5),        /* direct instead of buffered write */
  29         BMAPI_MMAP = (1 << 6),          /* allocate for mmap write */
  30         BMAPI_TRYLOCK = (1 << 7),       /* non-blocking request */
  31 } bmapi_flags_t;
  32
  33 #define BMAPI_FLAGS \
  34         { BMAPI_READ,           "READ" }, \
  35         { BMAPI_WRITE,          "WRITE" }, \
  36         { BMAPI_ALLOCATE,       "ALLOCATE" }, \
  37         { BMAPI_IGNSTATE,       "IGNSTATE" }, \
  38         { BMAPI_DIRECT,         "DIRECT" }, \
  39         { BMAPI_MMAP,           "MMAP" }, \
  40         { BMAPI_TRYLOCK,        "TRYLOCK" }
  41
  42 struct xfs_inode;
  43 struct xfs_bmbt_irec;
  44
  45 extern int xfs_iomap(struct xfs_inode *, xfs_off_t, ssize_t, int,
  46                      struct xfs_bmbt_irec *, int *, int *);
  47 extern int xfs_iomap_write_unwritten(struct xfs_inode *, xfs_off_t, size_t);
  48
  49 #endif /* __XFS_IOMAP_H__*/