blob: 54350b59046ba26ccf4a4d339ec1fc793b960e69 [file] [log] [blame]
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
Linus Torvalds1da177e2005-04-16 15:20:36 -07009#include <linux/kernel.h>
10#include <linux/errno.h>
11#include <linux/fcntl.h>
12#include <linux/stat.h>
13#include <linux/mm.h>
14#include <linux/slab.h>
15#include <linux/pagemap.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070016#include <linux/net.h>
17#include <linux/namei.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090018#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070019
20#include <asm/uaccess.h>
21#include <asm/system.h>
22
23#include <linux/smbno.h>
24#include <linux/smb_fs.h>
25
26#include "smb_debug.h"
27#include "proto.h"
28
29int smb_symlink(struct inode *inode, struct dentry *dentry, const char *oldname)
30{
31 DEBUG1("create symlink %s -> %s/%s\n", oldname, DENTRY_PATH(dentry));
32
33 return smb_proc_symlink(server_from_dentry(dentry), dentry, oldname);
34}
35
Al Viro008b1502005-08-20 00:17:39 +010036static void *smb_follow_link(struct dentry *dentry, struct nameidata *nd)
Linus Torvalds1da177e2005-04-16 15:20:36 -070037{
38 char *link = __getname();
39 DEBUG1("followlink of %s/%s\n", DENTRY_PATH(dentry));
40
41 if (!link) {
42 link = ERR_PTR(-ENOMEM);
43 } else {
44 int len = smb_proc_read_link(server_from_dentry(dentry),
45 dentry, link, PATH_MAX - 1);
46 if (len < 0) {
Davi Arnaut53b27582005-11-07 00:59:37 -080047 __putname(link);
Linus Torvalds1da177e2005-04-16 15:20:36 -070048 link = ERR_PTR(len);
49 } else {
50 link[len] = 0;
51 }
52 }
53 nd_set_link(nd, link);
Al Viro008b1502005-08-20 00:17:39 +010054 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -070055}
56
Al Viro008b1502005-08-20 00:17:39 +010057static void smb_put_link(struct dentry *dentry, struct nameidata *nd, void *p)
Linus Torvalds1da177e2005-04-16 15:20:36 -070058{
59 char *s = nd_get_link(nd);
60 if (!IS_ERR(s))
Davi Arnaut53b27582005-11-07 00:59:37 -080061 __putname(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -070062}
63
Arjan van de Venc5ef1c42007-02-12 00:55:40 -080064const struct inode_operations smb_link_inode_operations =
Linus Torvalds1da177e2005-04-16 15:20:36 -070065{
66 .readlink = generic_readlink,
67 .follow_link = smb_follow_link,
68 .put_link = smb_put_link,
69};