1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * Lustre Lite I/O page cache routines for the 2.5/2.6 kernel version
6 * Copyright (c) 2001-2003 Cluster File Systems, Inc.
8 * This file is part of Lustre, http://www.lustre.org.
10 * Lustre is free software; you can redistribute it and/or
11 * modify it under the terms of version 2 of the GNU General Public
12 * License as published by the Free Software Foundation.
14 * Lustre is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with Lustre; if not, write to the Free Software
21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 #include <linux/config.h>
25 #include <linux/kernel.h>
27 #include <linux/string.h>
28 #include <linux/stat.h>
29 #include <linux/errno.h>
30 #include <linux/smp_lock.h>
31 #include <linux/unistd.h>
32 #include <linux/version.h>
33 #include <asm/system.h>
34 #include <asm/uaccess.h>
37 #include <linux/buffer_head.h>
38 #include <linux/mpage.h>
39 #include <linux/writeback.h>
40 #include <linux/stat.h>
41 #include <asm/uaccess.h>
42 #include <asm/segment.h>
44 #include <linux/pagemap.h>
45 #include <linux/smp_lock.h>
46 #include <linux/writeback.h>
48 #define DEBUG_SUBSYSTEM S_LLITE
50 #include <linux/lustre_mds.h>
51 #include <linux/lustre_lite.h>
52 #include "llite_internal.h"
53 #include <linux/lustre_compat25.h>
55 static int ll_writepage_26(struct page *page, struct writeback_control *wbc)
57 return ll_writepage(page);
60 /* It is safe to not check anything in invalidatepage/releasepage below
61 because they are run with page locked and all our io is happening with
63 static int ll_invalidatepage(struct page *page, unsigned long offset)
67 if (PagePrivate(page))
72 static int ll_releasepage(struct page *page, int gfp_mask)
74 if (PagePrivate(page))
79 static int ll_writepages(struct address_space *mapping,
80 struct writeback_control *wbc)
82 struct ll_sb_info *sbi = ll_s2sbi(mapping->host->i_sb);
84 struct timeval tstart, now;
85 do_gettimeofday(&tstart);
86 rc = generic_writepages(mapping, wbc);
87 /* this synchronization (even being implemented via Writeback)
88 * makes recovery much more sad, because iget() can get stuck
89 * on I_LOCK the kernel helds over ->writepages() -bzzz */
90 if (rc == 0 && wbc->sync_mode == WB_SYNC_ALL
91 && sbi->ll_flags & LL_SBI_UMOUNT) {
92 /* as we don't use Writeback bit to track pages
93 * under I/O, filemap_fdatawait() doesn't work
94 * for us. let's wait for I/O completion here */
95 struct ll_inode_info *lli = ll_i2info(mapping->host);
96 wait_event(lli->lli_dirty_wait,
97 ll_is_inode_dirty(mapping->host) == 0);
98 do_gettimeofday(&now);
99 if (now.tv_sec - tstart.tv_sec > obd_timeout * 6) {
100 CDEBUG(D_ERROR, "synching inode 0x%p "DLID4" took %ds\n",
101 mapping->host, OLID4(&lli->lli_id),
102 (int) (now.tv_sec - tstart.tv_sec));
103 portals_debug_dumplog();
109 struct address_space_operations ll_aops = {
110 .readpage = ll_readpage,
111 // .readpages = ll_readpages,
112 // .direct_IO = ll_direct_IO_26,
113 .writepage = ll_writepage_26,
114 .writepages = ll_writepages,
115 .set_page_dirty = __set_page_dirty_nobuffers,
117 .prepare_write = ll_prepare_write,
118 .commit_write = ll_commit_write,
119 .invalidatepage = ll_invalidatepage,
120 .releasepage = ll_releasepage,