blob: 66edce7ecfd78f807451bdbf724cfabc071dbd5a [file] [log] [blame]
Mark Fashehccd979b2005-12-15 14:31:24 -08001/* -*- mode: c; c-basic-offset: 8; -*-
2 * vim: noexpandtab sw=8 ts=8 sts=0:
3 *
4 * linux/cluster/ssi/cfs/symlink.c
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License as
8 * published by the Free Software Foundation; either version 2 of
9 * the License, or (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE
14 * or NON INFRINGEMENT. See the GNU General Public License for more
15 * details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 *
21 * Questions/Comments/Bugfixes to ssic-linux-devel@lists.sourceforge.net
22 *
23 * Copyright (C) 1992 Rick Sladkey
24 *
25 * Optimization changes Copyright (C) 1994 Florian La Roche
26 *
27 * Jun 7 1999, cache symlink lookups in the page cache. -DaveM
28 *
29 * Portions Copyright (C) 2001 Compaq Computer Corporation
30 *
31 * ocfs2 symlink handling code.
32 *
33 * Copyright (C) 2004, 2005 Oracle.
34 *
35 */
36
37#include <linux/fs.h>
38#include <linux/types.h>
39#include <linux/slab.h>
40#include <linux/pagemap.h>
Joel Beckera731d122009-04-06 16:43:42 -070041#include <linux/namei.h>
Mark Fashehccd979b2005-12-15 14:31:24 -080042
Mark Fashehccd979b2005-12-15 14:31:24 -080043#include <cluster/masklog.h>
44
45#include "ocfs2.h"
46
47#include "alloc.h"
48#include "file.h"
49#include "inode.h"
50#include "journal.h"
51#include "symlink.h"
Tiger Yangcf1d6c72008-08-18 17:11:00 +080052#include "xattr.h"
Mark Fashehccd979b2005-12-15 14:31:24 -080053
54#include "buffer_head_io.h"
55
Mark Fashehccd979b2005-12-15 14:31:24 -080056
Al Viroea022dfb2012-05-03 10:14:29 -040057static int ocfs2_fast_symlink_readpage(struct file *unused, struct page *page)
Mark Fashehccd979b2005-12-15 14:31:24 -080058{
Al Viroea022dfb2012-05-03 10:14:29 -040059 struct inode *inode = page->mapping->host;
Sunil Mushran30b9c9e2012-08-03 17:36:17 +010060 struct buffer_head *bh = NULL;
Al Viroea022dfb2012-05-03 10:14:29 -040061 int status = ocfs2_read_inode_block(inode, &bh);
Mark Fashehccd979b2005-12-15 14:31:24 -080062 struct ocfs2_dinode *fe;
Al Viroea022dfb2012-05-03 10:14:29 -040063 const char *link;
64 void *kaddr;
65 size_t len;
Mark Fashehccd979b2005-12-15 14:31:24 -080066
Mark Fashehccd979b2005-12-15 14:31:24 -080067 if (status < 0) {
68 mlog_errno(status);
Al Viroea022dfb2012-05-03 10:14:29 -040069 return status;
Mark Fashehccd979b2005-12-15 14:31:24 -080070 }
71
Al Viroea022dfb2012-05-03 10:14:29 -040072 fe = (struct ocfs2_dinode *) bh->b_data;
Mark Fashehccd979b2005-12-15 14:31:24 -080073 link = (char *) fe->id2.i_symlink;
Al Viroea022dfb2012-05-03 10:14:29 -040074 /* will be less than a page size */
75 len = strnlen(link, ocfs2_fast_symlink_chars(inode->i_sb));
76 kaddr = kmap_atomic(page);
77 memcpy(kaddr, link, len + 1);
78 kunmap_atomic(kaddr);
79 SetPageUptodate(page);
80 unlock_page(page);
Mark Fashehccd979b2005-12-15 14:31:24 -080081 brelse(bh);
Al Viroea022dfb2012-05-03 10:14:29 -040082 return 0;
Mark Fashehccd979b2005-12-15 14:31:24 -080083}
84
Al Viroea022dfb2012-05-03 10:14:29 -040085const struct address_space_operations ocfs2_fast_symlink_aops = {
86 .readpage = ocfs2_fast_symlink_readpage,
87};
Mark Fashehccd979b2005-12-15 14:31:24 -080088
Arjan van de Ven92e1d5b2007-02-12 00:55:39 -080089const struct inode_operations ocfs2_symlink_inode_operations = {
Al Viroea022dfb2012-05-03 10:14:29 -040090 .readlink = generic_readlink,
Joel Beckera731d122009-04-06 16:43:42 -070091 .follow_link = page_follow_link_light,
92 .put_link = page_put_link,
Mark Fashehccd979b2005-12-15 14:31:24 -080093 .getattr = ocfs2_getattr,
Sunil Mushranbc535802008-04-18 10:23:53 -070094 .setattr = ocfs2_setattr,
Tiger Yangcf1d6c72008-08-18 17:11:00 +080095 .setxattr = generic_setxattr,
96 .getxattr = generic_getxattr,
97 .listxattr = ocfs2_listxattr,
98 .removexattr = generic_removexattr,
Tristan Ye86239d52009-12-22 09:11:58 +080099 .fiemap = ocfs2_fiemap,
Mark Fashehccd979b2005-12-15 14:31:24 -0800100};