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
24 /*
25 * note: all filemap functions return negative error codes. These
26 * need to be inverted before returning to the xfs core functions.
27 */
28 void
xfs_tosspages(xfs_inode_t * ip,xfs_off_t first,xfs_off_t last,int fiopt)29 xfs_tosspages(
30 xfs_inode_t *ip,
31 xfs_off_t first,
32 xfs_off_t last,
33 int fiopt)
34 {
35 /* can't toss partial tail pages, so mask them out */
36 last &= ~(PAGE_SIZE - 1);
37 truncate_inode_pages_range(VFS_I(ip)->i_mapping, first, last - 1);
38 }
39
40 int
xfs_flushinval_pages(xfs_inode_t * ip,xfs_off_t first,xfs_off_t last,int fiopt)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 = VFS_I(ip)->i_mapping;
48 int ret = 0;
49
50 trace_xfs_pagecache_inval(ip, first, last);
51
52 xfs_iflags_clear(ip, XFS_ITRUNCATED);
53 ret = filemap_write_and_wait_range(mapping, first,
54 last == -1 ? LLONG_MAX : last);
55 if (!ret)
56 truncate_inode_pages_range(mapping, first, last);
57 return -ret;
58 }
59
60 int
xfs_flush_pages(xfs_inode_t * ip,xfs_off_t first,xfs_off_t last,uint64_t flags,int fiopt)61 xfs_flush_pages(
62 xfs_inode_t *ip,
63 xfs_off_t first,
64 xfs_off_t last,
65 uint64_t flags,
66 int fiopt)
67 {
68 struct address_space *mapping = VFS_I(ip)->i_mapping;
69 int ret = 0;
70 int ret2;
71
72 xfs_iflags_clear(ip, XFS_ITRUNCATED);
73 ret = -filemap_fdatawrite_range(mapping, first,
74 last == -1 ? LLONG_MAX : last);
75 if (flags & XBF_ASYNC)
76 return ret;
77 ret2 = xfs_wait_on_pages(ip, first, last);
78 if (!ret)
79 ret = ret2;
80 return ret;
81 }
82
83 int
xfs_wait_on_pages(xfs_inode_t * ip,xfs_off_t first,xfs_off_t last)84 xfs_wait_on_pages(
85 xfs_inode_t *ip,
86 xfs_off_t first,
87 xfs_off_t last)
88 {
89 struct address_space *mapping = VFS_I(ip)->i_mapping;
90
91 if (mapping_tagged(mapping, PAGECACHE_TAG_WRITEBACK)) {
92 return -filemap_fdatawait_range(mapping, first,
93 last == -1 ? ip->i_size - 1 : last);
94 }
95 return 0;
96 }
97