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
fs_noerr(void)23 int fs_noerr(void) { return 0; }
fs_nosys(void)24 int fs_nosys(void) { return ENOSYS; }
fs_noval(void)25 void fs_noval(void) { return; }
26
27 /*
28 * note: all filemap functions return negative error codes. These
29 * need to be inverted before returning to the xfs core functions.
30 */
31 void
xfs_tosspages(xfs_inode_t * ip,xfs_off_t first,xfs_off_t last,int fiopt)32 xfs_tosspages(
33 xfs_inode_t *ip,
34 xfs_off_t first,
35 xfs_off_t last,
36 int fiopt)
37 {
38 struct address_space *mapping = VFS_I(ip)->i_mapping;
39
40 if (mapping->nrpages)
41 truncate_inode_pages(mapping, first);
42 }
43
44 int
xfs_flushinval_pages(xfs_inode_t * ip,xfs_off_t first,xfs_off_t last,int fiopt)45 xfs_flushinval_pages(
46 xfs_inode_t *ip,
47 xfs_off_t first,
48 xfs_off_t last,
49 int fiopt)
50 {
51 struct address_space *mapping = VFS_I(ip)->i_mapping;
52 int ret = 0;
53
54 if (mapping->nrpages) {
55 xfs_iflags_clear(ip, XFS_ITRUNCATED);
56 ret = filemap_write_and_wait(mapping);
57 if (!ret)
58 truncate_inode_pages(mapping, first);
59 }
60 return -ret;
61 }
62
63 int
xfs_flush_pages(xfs_inode_t * ip,xfs_off_t first,xfs_off_t last,uint64_t flags,int fiopt)64 xfs_flush_pages(
65 xfs_inode_t *ip,
66 xfs_off_t first,
67 xfs_off_t last,
68 uint64_t flags,
69 int fiopt)
70 {
71 struct address_space *mapping = VFS_I(ip)->i_mapping;
72 int ret = 0;
73 int ret2;
74
75 if (mapping_tagged(mapping, PAGECACHE_TAG_DIRTY)) {
76 xfs_iflags_clear(ip, XFS_ITRUNCATED);
77 ret = filemap_fdatawrite(mapping);
78 if (flags & XFS_B_ASYNC)
79 return -ret;
80 ret2 = filemap_fdatawait(mapping);
81 if (!ret)
82 ret = ret2;
83 }
84 return -ret;
85 }
86
87 int
xfs_wait_on_pages(xfs_inode_t * ip,xfs_off_t first,xfs_off_t last)88 xfs_wait_on_pages(
89 xfs_inode_t *ip,
90 xfs_off_t first,
91 xfs_off_t last)
92 {
93 struct address_space *mapping = VFS_I(ip)->i_mapping;
94
95 if (mapping_tagged(mapping, PAGECACHE_TAG_WRITEBACK))
96 return -filemap_fdatawait(mapping);
97 return 0;
98 }
99