[XFS] decontaminate vnode operations from behavior details
[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 #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 }