release/src-rt-6.x/linux/linux-2.6/fs/xfs/linux-2.6/xfs_fs_subr.c

   1 /*
   2  * Copyright (c) 2000-2002,2005-2006 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 #include "xfs.h"
  19
  20 int  fs_noerr(void) { return 0; }
  21 int  fs_nosys(void) { return ENOSYS; }
  22 void fs_noval(void) { return; }
  23
  24 void
  25 fs_tosspages(
  26         bhv_desc_t      *bdp,
  27         xfs_off_t       first,
  28         xfs_off_t       last,
  29         int             fiopt)
  30 {
  31         bhv_vnode_t     *vp = BHV_TO_VNODE(bdp);
  32         struct inode    *ip = vn_to_inode(vp);
  33
  34         if (VN_CACHED(vp))
  35                 truncate_inode_pages(ip->i_mapping, first);
  36 }
  37
  38 int
  39 fs_flushinval_pages(
  40         bhv_desc_t      *bdp,
  41         xfs_off_t       first,
  42         xfs_off_t       last,
  43         int             fiopt)
  44 {
  45         bhv_vnode_t     *vp = BHV_TO_VNODE(bdp);
  46         struct inode    *ip = vn_to_inode(vp);
  47         int             ret = 0;
  48
  49         if (VN_CACHED(vp)) {
  50                 if (VN_TRUNC(vp))
  51                         VUNTRUNCATE(vp);
  52                 ret = filemap_write_and_wait(ip->i_mapping);
  53                 if (!ret)
  54                         truncate_inode_pages(ip->i_mapping, first);
  55         }
  56         return ret;
  57 }
  58
  59 int
  60 fs_flush_pages(
  61         bhv_desc_t      *bdp,
  62         xfs_off_t       first,
  63         xfs_off_t       last,
  64         uint64_t        flags,
  65         int             fiopt)
  66 {
  67         bhv_vnode_t     *vp = BHV_TO_VNODE(bdp);
  68         struct inode    *ip = vn_to_inode(vp);
  69         int             ret = 0;
  70         int             ret2;
  71
  72         if (VN_DIRTY(vp)) {
  73                 if (VN_TRUNC(vp))
  74                         VUNTRUNCATE(vp);
  75                 ret = filemap_fdatawrite(ip->i_mapping);
  76                 if (flags & XFS_B_ASYNC)
  77                         return ret;
  78                 ret2 = filemap_fdatawait(ip->i_mapping);
  79                 if (!ret)
  80                         ret = ret2;
  81         }
  82         return ret;
  83 }