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 #include "xfs_bmap_btree.h"
  21 #include "xfs_inode.h"
  22
  23 int  fs_noerr(void) { return 0; }
  24 int  fs_nosys(void) { return ENOSYS; }
  25 void fs_noval(void) { return; }
  26
  27 void
  28 xfs_tosspages(
  29         xfs_inode_t     *ip,
  30         xfs_off_t       first,
  31         xfs_off_t       last,
  32         int             fiopt)
  33 {
  34         struct address_space *mapping = ip->i_vnode->i_mapping;
  35
  36         if (mapping->nrpages)
  37                 truncate_inode_pages(mapping, first);
  38 }
  39
  40 int
  41 xfs_flushinval_pages(
  42         xfs_inode_t     *ip,
  43         xfs_off_t       first,
  44         xfs_off_t       last,
  45         int             fiopt)
  46 {
  47         struct address_space *mapping = ip->i_vnode->i_mapping;
  48         int             ret = 0;
  49
  50         if (mapping->nrpages) {
  51                 xfs_iflags_clear(ip, XFS_ITRUNCATED);
  52                 ret = filemap_write_and_wait(mapping);
  53                 if (!ret)
  54                         truncate_inode_pages(mapping, first);
  55         }
  56         return ret;
  57 }
  58
  59 int
  60 xfs_flush_pages(
  61         xfs_inode_t     *ip,
  62         xfs_off_t       first,
  63         xfs_off_t       last,
  64         uint64_t        flags,
  65         int             fiopt)
  66 {
  67         struct address_space *mapping = ip->i_vnode->i_mapping;
  68         int             ret = 0;
  69         int             ret2;
  70
  71         if (mapping_tagged(mapping, PAGECACHE_TAG_DIRTY)) {
  72                 xfs_iflags_clear(ip, XFS_ITRUNCATED);
  73                 ret = filemap_fdatawrite(mapping);
  74                 if (flags & XFS_B_ASYNC)
  75                         return ret;
  76                 ret2 = filemap_fdatawait(mapping);
  77                 if (!ret)
  78                         ret = ret2;
  79         }
  80         return ret;
  81 }