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_ISAIO        0x00001         /* don't wait for completion */
  40 #define IO_ISDIRECT     0x00004         /* bypass page cache */
  41 #define IO_INVIS        0x00020         /* don't update inode timestamps */
  42
  43 /*
  44  * Flags for xfs_inode_flush
  45  */
  46 #define FLUSH_SYNC              1       /* wait for flush to complete   */
  47
  48 /*
  49  * Flush/Invalidate options for vop_toss/flush/flushinval_pages.
  50  */
  51 #define FI_NONE                 0       /* none */
  52 #define FI_REMAPF               1       /* Do a remapf prior to the operation */
  53 #define FI_REMAPF_LOCKED        2       /* Do a remapf prior to the operation.
  54                                            Prevent VM access to the pages until
  55                                            the operation completes. */
  56
  57 /*
  58  * Dealing with bad inodes
  59  */
  60 static inline int VN_BAD(struct inode *vp)
  61 {
  62         return is_bad_inode(vp);
  63 }
  64
  65 /*
  66  * Extracting atime values in various formats
  67  */
  68 static inline void vn_atime_to_bstime(struct inode *vp, xfs_bstime_t *bs_atime)
  69 {
  70         bs_atime->tv_sec = vp->i_atime.tv_sec;
  71         bs_atime->tv_nsec = vp->i_atime.tv_nsec;
  72 }
  73
  74 static inline void vn_atime_to_timespec(struct inode *vp, struct timespec *ts)
  75 {
  76         *ts = vp->i_atime;
  77 }
  78
  79 static inline void vn_atime_to_time_t(struct inode *vp, time_t *tt)
  80 {
  81         *tt = vp->i_atime.tv_sec;
  82 }
  83
  84 /*
  85  * Some useful predicates.
  86  */
  87 #define VN_MAPPED(vp)   mapping_mapped(vp->i_mapping)
  88 #define VN_CACHED(vp)   (vp->i_mapping->nrpages)
  89 #define VN_DIRTY(vp)    mapping_tagged(vp->i_mapping, \
  90                                         PAGECACHE_TAG_DIRTY)
  91
  92
  93 #endif  /* __XFS_VNODE_H__ */