1 /*
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/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>
16 #include <linux/net.h>
17 #include <linux/namei.h>
18
19 #include <asm/uaccess.h>
20 #include <asm/system.h>
21
22 #include <linux/smbno.h>
23 #include <linux/smb_fs.h>
24
25 #include "smb_debug.h"
26 #include "proto.h"
27
smb_symlink(struct inode * inode,struct dentry * dentry,const char * oldname)28 int smb_symlink(struct inode *inode, struct dentry *dentry, const char *oldname)
29 {
30 DEBUG1("create symlink %s -> %s/%s\n", oldname, DENTRY_PATH(dentry));
31
32 return smb_proc_symlink(server_from_dentry(dentry), dentry, oldname);
33 }
34
smb_follow_link(struct dentry * dentry,struct nameidata * nd)35 static void *smb_follow_link(struct dentry *dentry, struct nameidata *nd)
36 {
37 char *link = __getname();
38 DEBUG1("followlink of %s/%s\n", DENTRY_PATH(dentry));
39
40 if (!link) {
41 link = ERR_PTR(-ENOMEM);
42 } else {
43 int len = smb_proc_read_link(server_from_dentry(dentry),
44 dentry, link, PATH_MAX - 1);
45 if (len < 0) {
46 __putname(link);
47 link = ERR_PTR(len);
48 } else {
49 link[len] = 0;
50 }
51 }
52 nd_set_link(nd, link);
53 return NULL;
54 }
55
smb_put_link(struct dentry * dentry,struct nameidata * nd,void * p)56 static void smb_put_link(struct dentry *dentry, struct nameidata *nd, void *p)
57 {
58 char *s = nd_get_link(nd);
59 if (!IS_ERR(s))
60 __putname(s);
61 }
62
63 const struct inode_operations smb_link_inode_operations =
64 {
65 .readlink = generic_readlink,
66 .follow_link = smb_follow_link,
67 .put_link = smb_put_link,
68 };
69