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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * symlink.c
3 *
4 * Copyright (C) 2002 by John Newbigin
5 *
6 * Please add a note about your changes to smbfs in the ChangeLog file.
7 */
8
9#include <linux/sched.h>
10#include <linux/kernel.h>
11#include <linux/errno.h>
12#include <linux/fcntl.h>
13#include <linux/stat.h>
14#include <linux/mm.h>
15#include <linux/slab.h>
16#include <linux/pagemap.h>
17#include <linux/smp_lock.h>
18#include <linux/net.h>
19#include <linux/namei.h>
20
21#include <asm/uaccess.h>
22#include <asm/system.h>
23
24#include <linux/smbno.h>
25#include <linux/smb_fs.h>
26
27#include "smb_debug.h"
28#include "proto.h"
29
30int smb_symlink(struct inode *inode, struct dentry *dentry, const char *oldname)
31{
32 DEBUG1("create symlink %s -> %s/%s\n", oldname, DENTRY_PATH(dentry));
33
34 return smb_proc_symlink(server_from_dentry(dentry), dentry, oldname);
35}
36
Al Viro008b1502005-08-20 00:17:39 +010037static void *smb_follow_link(struct dentry *dentry, struct nameidata *nd)
Linus Torvalds1da177e2005-04-16 15:20:36 -070038{
39 char *link = __getname();
40 DEBUG1("followlink of %s/%s\n", DENTRY_PATH(dentry));
41
42 if (!link) {
43 link = ERR_PTR(-ENOMEM);
44 } else {
45 int len = smb_proc_read_link(server_from_dentry(dentry),
46 dentry, link, PATH_MAX - 1);
47 if (len < 0) {
Davi Arnaut53b27582005-11-07 00:59:37 -080048 __putname(link);
Linus Torvalds1da177e2005-04-16 15:20:36 -070049 link = ERR_PTR(len);
50 } else {
51 link[len] = 0;
52 }
53 }
54 nd_set_link(nd, link);
Al Viro008b1502005-08-20 00:17:39 +010055 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -070056}
57
Al Viro008b1502005-08-20 00:17:39 +010058static void smb_put_link(struct dentry *dentry, struct nameidata *nd, void *p)
Linus Torvalds1da177e2005-04-16 15:20:36 -070059{
60 char *s = nd_get_link(nd);
61 if (!IS_ERR(s))
Davi Arnaut53b27582005-11-07 00:59:37 -080062 __putname(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -070063}
64
65struct inode_operations smb_link_inode_operations =
66{
67 .readlink = generic_readlink,
68 .follow_link = smb_follow_link,
69 .put_link = smb_put_link,
70};