blob: 6bbef53b181fc5097126c10b7be9f72c91d93632 (
plain)
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
|
/* -*- linux-c -*-
*
* debugfs functions
* Copyright (C) 2009 Red Hat Inc.
*
* This file is part of systemtap, and is free software. You can
* redistribute it and/or modify it under the terms of the GNU General
* Public License (GPL); either version 2, or (at your option) any
* later version.
*/
#include <linux/debugfs.h>
#include "transport.h"
#define STP_DEFAULT_BUFFERS 50
inline static int _stp_ctl_write_fs(int type, void *data, unsigned len)
{
return 0;
}
static struct dentry *_stp_cmd_file = NULL;
static int _stp_register_ctl_channel_fs(void)
{
struct dentry *module_dir = _stp_get_module_dir();
if (module_dir == NULL) {
errk("no module directory found.\n");
return -1;
}
/* create [debugfs]/systemtap/module_name/.cmd */
_stp_cmd_file = debugfs_create_file(".cmd", 0600, module_dir,
NULL, &_stp_ctl_fops_cmd);
if (_stp_cmd_file == NULL) {
errk("Error creating systemtap debugfs entries.\n");
return -1;
}
else if (IS_ERR(_stp_cmd_file)) {
_stp_cmd_file = NULL;
errk("Error creating systemtap debugfs entries: %ld\n",
-PTR_ERR(_stp_cmd_file));
return -1;
}
_stp_cmd_file->d_inode->i_uid = _stp_uid;
_stp_cmd_file->d_inode->i_gid = _stp_gid;
return 0;
}
static void _stp_unregister_ctl_channel_fs(void)
{
if (_stp_cmd_file)
debugfs_remove(_stp_cmd_file);
}
|
