1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
|
/* -*- linux-c -*- --------------------------------------------------------- *
*
* linux/fs/autofs/symlink.c
*
* Copyright 1997-1998 Transmeta Corporation -- All Rights Reserved
*
* This file is part of the Linux kernel and is made available under
* the terms of the GNU General Public License, version 2, or at your
* option, any later version, incorporated herein by reference.
*
* ------------------------------------------------------------------------- */
#include <linux/string.h>
#include <linux/sched.h>
#include "autofs_i.h"
static int autofs_readlink(struct dentry *dentry, char *buffer, int buflen)
{
struct autofs_symlink *sl;
int len;
sl = (struct autofs_symlink *)dentry->d_inode->u.generic_ip;
len = sl->len;
if (len > buflen) len = buflen;
copy_to_user(buffer, sl->data, len);
return len;
}
static struct dentry * autofs_follow_link(struct dentry *dentry,
struct dentry *base,
unsigned int follow)
{
struct autofs_symlink *sl;
sl = (struct autofs_symlink *)dentry->d_inode->u.generic_ip;
return lookup_dentry(sl->data, base, follow);
}
struct inode_operations autofs_symlink_inode_operations = {
NULL, /* file operations */
NULL, /* create */
NULL, /* lookup */
NULL, /* link */
NULL, /* unlink */
NULL, /* symlink */
NULL, /* mkdir */
NULL, /* rmdir */
NULL, /* mknod */
NULL, /* rename */
autofs_readlink, /* readlink */
autofs_follow_link, /* follow_link */
NULL, /* readpage */
NULL, /* writepage */
NULL, /* bmap */
NULL, /* truncate */
NULL, /* permission */
NULL, /* smap */
NULL, /* updatepage */
NULL /* revalidate */
};
|
