fs/xfs/linux-2.6/xfs_fs_subr.c

   1 /*
   2  * Copyright (c) 2000-2002 Silicon Graphics, Inc.  All Rights Reserved.
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms of version 2 of the GNU General Public License as
   6  * published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it would be useful, but
   9  * WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  11  *
  12  * Further, this software is distributed without any warranty that it is
  13  * free of the rightful claim of any third person regarding infringement
  14  * or the like.  Any license provided herein, whether implied or
  15  * otherwise, applies only to this software file.  Patent licenses, if
  16  * any, provided herein do not apply to combinations of this program with
  17  * other software, or any other product whatsoever.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, write the Free Software Foundation, Inc., 59
  21  * Temple Place - Suite 330, Boston MA 02111-1307, USA.
  22  *
  23  * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
  24  * Mountain View, CA  94043, or:
  25  *
  26  * http://www.sgi.com
  27  *
  28  * For further information regarding this notice, see:
  29  *
  30  * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
  31  */
  32
  33 #include "xfs.h"
  34
  35 /*
  36  * Stub for no-op vnode operations that return error status.
  37  */
  38 int
  39 fs_noerr(void)
  40 {
  41         return 0;
  42 }
  43
  44 /*
  45  * Operation unsupported under this file system.
  46  */
  47 int
  48 fs_nosys(void)
  49 {
  50         return ENOSYS;
  51 }
  52
  53 /*
  54  * Stub for inactive, strategy, and read/write lock/unlock.  Does nothing.
  55  */
  56 /* ARGSUSED */
  57 void
  58 fs_noval(void)
  59 {
  60 }
  61
  62 /*
  63  * vnode pcache layer for vnode_tosspages.
  64  * 'last' parameter unused but left in for IRIX compatibility
  65  */
  66 void
  67 fs_tosspages(
  68         bhv_desc_t      *bdp,
  69         xfs_off_t       first,
  70         xfs_off_t       last,
  71         int             fiopt)
  72 {
  73         vnode_t         *vp = BHV_TO_VNODE(bdp);
  74         struct inode    *ip = LINVFS_GET_IP(vp);
  75
  76         if (VN_CACHED(vp))
  77                 truncate_inode_pages(ip->i_mapping, first);
  78 }
  79
  80
  81 /*
  82  * vnode pcache layer for vnode_flushinval_pages.
  83  * 'last' parameter unused but left in for IRIX compatibility
  84  */
  85 void
  86 fs_flushinval_pages(
  87         bhv_desc_t      *bdp,
  88         xfs_off_t       first,
  89         xfs_off_t       last,
  90         int             fiopt)
  91 {
  92         vnode_t         *vp = BHV_TO_VNODE(bdp);
  93         struct inode    *ip = LINVFS_GET_IP(vp);
  94
  95         if (VN_CACHED(vp)) {
  96                 filemap_fdatawrite(ip->i_mapping);
  97                 filemap_fdatawait(ip->i_mapping);
  98
  99                 truncate_inode_pages(ip->i_mapping, first);
 100         }
 101 }
 102
 103 /*
 104  * vnode pcache layer for vnode_flush_pages.
 105  * 'last' parameter unused but left in for IRIX compatibility
 106  */
 107 int
 108 fs_flush_pages(
 109         bhv_desc_t      *bdp,
 110         xfs_off_t       first,
 111         xfs_off_t       last,
 112         uint64_t        flags,
 113         int             fiopt)
 114 {
 115         vnode_t         *vp = BHV_TO_VNODE(bdp);
 116         struct inode    *ip = LINVFS_GET_IP(vp);
 117
 118         if (VN_CACHED(vp)) {
 119                 filemap_fdatawrite(ip->i_mapping);
 120                 if (flags & XFS_B_ASYNC)
 121                         return 0;
 122                 filemap_fdatawait(ip->i_mapping);
 123         }
 124
 125         return 0;
 126 }