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
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
|
/* -*- linux-c -*- --------------------------------------------------------- *
*
* linux/fs/autofs/dir.c
*
* Copyright 1997 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 "autofs_i.h"
static int autofs_dir_readdir(struct inode *inode, struct file *filp,
void *dirent, filldir_t filldir)
{
if (!inode || !S_ISDIR(inode->i_mode))
return -ENOTDIR;
switch((unsigned long) filp->f_pos)
{
case 0:
if (filldir(dirent, ".", 1, 0, inode->i_ino) < 0)
return 0;
filp->f_pos++;
/* fall through */
case 1:
if (filldir(dirent, "..", 2, 1, AUTOFS_ROOT_INO) < 0)
return 0;
filp->f_pos++;
/* fall through */
}
return 1;
}
static int autofs_dir_lookup(struct inode *dir, const char *name, int len,
struct inode **result)
{
*result = dir;
if (!len)
return 0;
if (name[0] == '.') {
if (len == 1)
return 0;
if (name[1] == '.' && len == 2) {
/* Return the root directory */
*result = iget(dir->i_sb,AUTOFS_ROOT_INO);
iput(dir);
return 0;
}
}
*result = NULL;
iput(dir);
return -ENOENT; /* No other entries */
}
static struct file_operations autofs_dir_operations = {
NULL, /* lseek */
NULL, /* read */
NULL, /* write */
autofs_dir_readdir, /* readdir */
NULL, /* select */
NULL, /* ioctl */
NULL, /* mmap */
NULL, /* open */
NULL, /* release */
NULL /* fsync */
};
struct inode_operations autofs_dir_inode_operations = {
&autofs_dir_operations, /* file operations */
NULL, /* create */
autofs_dir_lookup, /* lookup */
NULL, /* link */
NULL, /* unlink */
NULL, /* symlink */
NULL, /* mkdir */
NULL, /* rmdir */
NULL, /* mknod */
NULL, /* rename */
NULL, /* readlink */
NULL, /* follow_link */
NULL, /* read_page */
NULL, /* writepage */
NULL, /* bmap */
NULL, /* truncate */
NULL /* permission */
};
|
