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ccd979bd MF |
1 | /* -*- 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> | |
a731d12d | 41 | #include <linux/namei.h> |
ccd979bd | 42 | |
ccd979bd MF |
43 | #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" | |
cf1d6c76 | 52 | #include "xattr.h" |
ccd979bd MF |
53 | |
54 | #include "buffer_head_io.h" | |
55 | ||
ccd979bd | 56 | |
ea022dfb | 57 | static int ocfs2_fast_symlink_readpage(struct file *unused, struct page *page) |
ccd979bd | 58 | { |
ea022dfb | 59 | struct inode *inode = page->mapping->host; |
30b9c9e6 | 60 | struct buffer_head *bh = NULL; |
ea022dfb | 61 | int status = ocfs2_read_inode_block(inode, &bh); |
ccd979bd | 62 | struct ocfs2_dinode *fe; |
ea022dfb AV |
63 | const char *link; |
64 | void *kaddr; | |
65 | size_t len; | |
ccd979bd | 66 | |
ccd979bd MF |
67 | if (status < 0) { |
68 | mlog_errno(status); | |
ea022dfb | 69 | return status; |
ccd979bd MF |
70 | } |
71 | ||
ea022dfb | 72 | fe = (struct ocfs2_dinode *) bh->b_data; |
ccd979bd | 73 | link = (char *) fe->id2.i_symlink; |
ea022dfb AV |
74 | /* 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); | |
ccd979bd | 81 | brelse(bh); |
ea022dfb | 82 | return 0; |
ccd979bd MF |
83 | } |
84 | ||
ea022dfb AV |
85 | const struct address_space_operations ocfs2_fast_symlink_aops = { |
86 | .readpage = ocfs2_fast_symlink_readpage, | |
87 | }; | |
ccd979bd | 88 | |
92e1d5be | 89 | const struct inode_operations ocfs2_symlink_inode_operations = { |
ea022dfb | 90 | .readlink = generic_readlink, |
6b255391 | 91 | .get_link = page_get_link, |
ccd979bd | 92 | .getattr = ocfs2_getattr, |
bc535809 | 93 | .setattr = ocfs2_setattr, |
cf1d6c76 | 94 | .listxattr = ocfs2_listxattr, |
86239d59 | 95 | .fiemap = ocfs2_fiemap, |
ccd979bd | 96 | }; |