release/src-rt-6.x.4708/linux/linux-2.6.36/fs/xfs/linux-2.6/xfs_vnode.h

   1 /*
   2  * Copyright (c) 2000-2005 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_VNODE_H__
  19 #define __XFS_VNODE_H__
  20
  21 #include "xfs_fs.h"
  22
  23 struct file;
  24 struct xfs_inode;
  25 struct xfs_iomap;
  26 struct attrlist_cursor_kern;
  27
  28 /*
  29  * Return values for xfs_inactive.  A return value of
  30  * VN_INACTIVE_NOCACHE implies that the file system behavior
  31  * has disassociated its state and bhv_desc_t from the vnode.
  32  */
  33 #define VN_INACTIVE_CACHE       0
  34 #define VN_INACTIVE_NOCACHE     1
  35
  36 /*
  37  * Flags for read/write calls - same values as IRIX
  38  */
  39 #define IO_ISDIRECT     0x00004         /* bypass page cache */
  40 #define IO_INVIS        0x00020         /* don't update inode timestamps */
  41
  42 #define XFS_IO_FLAGS \
  43         { IO_ISDIRECT,  "DIRECT" }, \
  44         { IO_INVIS,     "INVIS"}
  45
  46 /*
  47  * Flush/Invalidate options for vop_toss/flush/flushinval_pages.
  48  */
  49 #define FI_NONE                 0       /* none */
  50 #define FI_REMAPF               1       /* Do a remapf prior to the operation */
  51 #define FI_REMAPF_LOCKED        2       /* Do a remapf prior to the operation.
  52                                            Prevent VM access to the pages until
  53                                            the operation completes. */
  54
  55 /*
  56  * Some useful predicates.
  57  */
  58 #define VN_MAPPED(vp)   mapping_mapped(vp->i_mapping)
  59 #define VN_CACHED(vp)   (vp->i_mapping->nrpages)
  60 #define VN_DIRTY(vp)    mapping_tagged(vp->i_mapping, \
  61                                         PAGECACHE_TAG_DIRTY)
  62
  63
  64 #endif  /* __XFS_VNODE_H__ */