tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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#include "xfs_trace.h"
23
24int fs_noerr(void) { return 0; }
25int fs_nosys(void) { return ENOSYS; }
26void fs_noval(void) { return; }
27
28/*
29 * note: all filemap functions return negative error codes. These
30 * need to be inverted before returning to the xfs core functions.
31 */
32void
33xfs_tosspages(
34 xfs_inode_t *ip,
35 xfs_off_t first,
36 xfs_off_t last,
37 int fiopt)
38{
39 struct address_space *mapping = VFS_I(ip)->i_mapping;
40
41 if (mapping->nrpages)
42 truncate_inode_pages(mapping, first);
43}
44
45int
46xfs_flushinval_pages(
47 xfs_inode_t *ip,
48 xfs_off_t first,
49 xfs_off_t last,
50 int fiopt)
51{
52 struct address_space *mapping = VFS_I(ip)->i_mapping;
53 int ret = 0;
54
55 trace_xfs_pagecache_inval(ip, first, last);
56
57 if (mapping->nrpages) {
58 xfs_iflags_clear(ip, XFS_ITRUNCATED);
59 ret = filemap_write_and_wait(mapping);
60 if (!ret)
61 truncate_inode_pages(mapping, first);
62 }
63 return -ret;
64}
65
66int
67xfs_flush_pages(
68 xfs_inode_t *ip,
69 xfs_off_t first,
70 xfs_off_t last,
71 uint64_t flags,
72 int fiopt)
73{
74 struct address_space *mapping = VFS_I(ip)->i_mapping;
75 int ret = 0;
76 int ret2;
77
78 if (mapping_tagged(mapping, PAGECACHE_TAG_DIRTY)) {
79 xfs_iflags_clear(ip, XFS_ITRUNCATED);
80 ret = -filemap_fdatawrite(mapping);
81 }
82 if (flags & XBF_ASYNC)
83 return ret;
84 ret2 = xfs_wait_on_pages(ip, first, last);
85 if (!ret)
86 ret = ret2;
87 return ret;
88}
89
90int
91xfs_wait_on_pages(
92 xfs_inode_t *ip,
93 xfs_off_t first,
94 xfs_off_t last)
95{
96 struct address_space *mapping = VFS_I(ip)->i_mapping;
97
98 if (mapping_tagged(mapping, PAGECACHE_TAG_WRITEBACK))
99 return -filemap_fdatawait(mapping);
100 return 0;
101}