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 #include "xfs_vnodeops.h"
  20
  21 /*
  22  * The following six includes are needed so that we can include
  23  * xfs_inode.h.  What a mess..
  24  */
  25 #include "xfs_bmap_btree.h"
  26 #include "xfs_inum.h"
  27 #include "xfs_dir2.h"
  28 #include "xfs_dir2_sf.h"
  29 #include "xfs_attr_sf.h"
  30 #include "xfs_dinode.h"
  31
  32 #include "xfs_inode.h"
  33
  34 int  fs_noerr(void) { return 0; }
  35 int  fs_nosys(void) { return ENOSYS; }
  36 void fs_noval(void) { return; }
  37
  38 void
  39 xfs_tosspages(
  40         xfs_inode_t     *ip,
  41         xfs_off_t       first,
  42         xfs_off_t       last,
  43         int             fiopt)
  44 {
  45         bhv_vnode_t     *vp = XFS_ITOV(ip);
  46         struct inode    *inode = vn_to_inode(vp);
  47
  48         if (VN_CACHED(vp))
  49                 truncate_inode_pages(inode->i_mapping, first);
  50 }
  51
  52 int
  53 xfs_flushinval_pages(
  54         xfs_inode_t     *ip,
  55         xfs_off_t       first,
  56         xfs_off_t       last,
  57         int             fiopt)
  58 {
  59         bhv_vnode_t     *vp = XFS_ITOV(ip);
  60         struct inode    *inode = vn_to_inode(vp);
  61         int             ret = 0;
  62
  63         if (VN_CACHED(vp)) {
  64                 if (VN_TRUNC(vp))
  65                         VUNTRUNCATE(vp);
  66                 ret = filemap_write_and_wait(inode->i_mapping);
  67                 if (!ret)
  68                         truncate_inode_pages(inode->i_mapping, first);
  69         }
  70         return ret;
  71 }
  72
  73 int
  74 xfs_flush_pages(
  75         xfs_inode_t     *ip,
  76         xfs_off_t       first,
  77         xfs_off_t       last,
  78         uint64_t        flags,
  79         int             fiopt)
  80 {
  81         bhv_vnode_t     *vp = XFS_ITOV(ip);
  82         struct inode    *inode = vn_to_inode(vp);
  83         int             ret = 0;
  84         int             ret2;
  85
  86         if (VN_DIRTY(vp)) {
  87                 if (VN_TRUNC(vp))
  88                         VUNTRUNCATE(vp);
  89                 ret = filemap_fdatawrite(inode->i_mapping);
  90                 if (flags & XFS_B_ASYNC)
  91                         return ret;
  92                 ret2 = filemap_fdatawait(inode->i_mapping);
  93                 if (!ret)
  94                         ret = ret2;
  95         }
  96         return ret;
  97 }