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
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
|
/*
* Export SMBIOS/DMI info via sysfs to userspace
*
* Copyright 2007, Lennart Poettering
*
* Licensed under GPLv2
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/dmi.h>
#include <linux/device.h>
struct dmi_device_attribute{
struct device_attribute dev_attr;
int field;
};
#define to_dmi_dev_attr(_dev_attr) \
container_of(_dev_attr, struct dmi_device_attribute, dev_attr)
static ssize_t sys_dmi_field_show(struct device *dev,
struct device_attribute *attr,
char *page)
{
int field = to_dmi_dev_attr(attr)->field;
ssize_t len;
len = scnprintf(page, PAGE_SIZE, "%s\n", dmi_get_system_info(field));
page[len-1] = '\n';
return len;
}
#define DMI_ATTR(_name, _mode, _show, _field) \
{ .dev_attr = __ATTR(_name, _mode, _show, NULL), \
.field = _field }
#define DEFINE_DMI_ATTR_WITH_SHOW(_name, _mode, _field) \
static struct dmi_device_attribute sys_dmi_##_name##_attr = \
DMI_ATTR(_name, _mode, sys_dmi_field_show, _field);
DEFINE_DMI_ATTR_WITH_SHOW(bios_vendor, 0444, DMI_BIOS_VENDOR);
DEFINE_DMI_ATTR_WITH_SHOW(bios_version, 0444, DMI_BIOS_VERSION);
DEFINE_DMI_ATTR_WITH_SHOW(bios_date, 0444, DMI_BIOS_DATE);
DEFINE_DMI_ATTR_WITH_SHOW(sys_vendor, 0444, DMI_SYS_VENDOR);
DEFINE_DMI_ATTR_WITH_SHOW(product_name, 0444, DMI_PRODUCT_NAME);
DEFINE_DMI_ATTR_WITH_SHOW(product_version, 0444, DMI_PRODUCT_VERSION);
DEFINE_DMI_ATTR_WITH_SHOW(product_serial, 0400, DMI_PRODUCT_SERIAL);
DEFINE_DMI_ATTR_WITH_SHOW(product_uuid, 0400, DMI_PRODUCT_UUID);
DEFINE_DMI_ATTR_WITH_SHOW(board_vendor, 0444, DMI_BOARD_VENDOR);
DEFINE_DMI_ATTR_WITH_SHOW(board_name, 0444, DMI_BOARD_NAME);
DEFINE_DMI_ATTR_WITH_SHOW(board_version, 0444, DMI_BOARD_VERSION);
DEFINE_DMI_ATTR_WITH_SHOW(board_serial, 0400, DMI_BOARD_SERIAL);
DEFINE_DMI_ATTR_WITH_SHOW(board_asset_tag, 0444, DMI_BOARD_ASSET_TAG);
DEFINE_DMI_ATTR_WITH_SHOW(chassis_vendor, 0444, DMI_CHASSIS_VENDOR);
DEFINE_DMI_ATTR_WITH_SHOW(chassis_type, 0444, DMI_CHASSIS_TYPE);
DEFINE_DMI_ATTR_WITH_SHOW(chassis_version, 0444, DMI_CHASSIS_VERSION);
DEFINE_DMI_ATTR_WITH_SHOW(chassis_serial, 0400, DMI_CHASSIS_SERIAL);
DEFINE_DMI_ATTR_WITH_SHOW(chassis_asset_tag, 0444, DMI_CHASSIS_ASSET_TAG);
static void ascii_filter(char *d, const char *s)
{
/* Filter out characters we don't want to see in the modalias string */
for (; *s; s++)
if (*s > ' ' && *s < 127 && *s != ':')
*(d++) = *s;
*d = 0;
}
static ssize_t get_modalias(char *buffer, size_t buffer_size)
{
static const struct mafield {
const char *prefix;
int field;
} fields[] = {
{ "bvn", DMI_BIOS_VENDOR },
{ "bvr", DMI_BIOS_VERSION },
{ "bd", DMI_BIOS_DATE },
{ "svn", DMI_SYS_VENDOR },
{ "pn", DMI_PRODUCT_NAME },
{ "pvr", DMI_PRODUCT_VERSION },
{ "rvn", DMI_BOARD_VENDOR },
{ "rn", DMI_BOARD_NAME },
{ "rvr", DMI_BOARD_VERSION },
{ "cvn", DMI_CHASSIS_VENDOR },
{ "ct", DMI_CHASSIS_TYPE },
{ "cvr", DMI_CHASSIS_VERSION },
{ NULL, DMI_NONE }
};
ssize_t l, left;
char *p;
const struct mafield *f;
strcpy(buffer, "dmi");
p = buffer + 3; left = buffer_size - 4;
for (f = fields; f->prefix && left > 0; f++) {
const char *c;
char *t;
c = dmi_get_system_info(f->field);
if (!c)
continue;
t = kmalloc(strlen(c) + 1, GFP_KERNEL);
if (!t)
break;
ascii_filter(t, c);
l = scnprintf(p, left, ":%s%s", f->prefix, t);
kfree(t);
p += l;
left -= l;
}
p[0] = ':';
p[1] = 0;
return p - buffer + 1;
}
static ssize_t sys_dmi_modalias_show(struct device *dev,
struct device_attribute *attr, char *page)
{
ssize_t r;
r = get_modalias(page, PAGE_SIZE-1);
page[r] = '\n';
page[r+1] = 0;
return r+1;
}
static struct device_attribute sys_dmi_modalias_attr =
__ATTR(modalias, 0444, sys_dmi_modalias_show, NULL);
static struct attribute *sys_dmi_attributes[DMI_STRING_MAX+2];
static struct attribute_group sys_dmi_attribute_group = {
.attrs = sys_dmi_attributes,
};
static struct attribute_group* sys_dmi_attribute_groups[] = {
&sys_dmi_attribute_group,
NULL
};
static int dmi_dev_uevent(struct device *dev, struct kobj_uevent_env *env)
{
ssize_t len;
if (add_uevent_var(env, "MODALIAS="))
return -ENOMEM;
len = get_modalias(&env->buf[env->buflen - 1],
sizeof(env->buf) - env->buflen);
if (len >= (sizeof(env->buf) - env->buflen))
return -ENOMEM;
env->buflen += len;
return 0;
}
static struct class dmi_class = {
.name = "dmi",
.dev_release = (void(*)(struct device *)) kfree,
.dev_uevent = dmi_dev_uevent,
};
static struct device *dmi_dev;
/* Initialization */
#define ADD_DMI_ATTR(_name, _field) \
if (dmi_get_system_info(_field)) \
sys_dmi_attributes[i++] = &sys_dmi_##_name##_attr.dev_attr.attr;
/* In a separate function to keep gcc 3.2 happy - do NOT merge this in
dmi_id_init! */
static void __init dmi_id_init_attr_table(void)
{
int i;
/* Not necessarily all DMI fields are available on all
* systems, hence let's built an attribute table of just
* what's available */
i = 0;
ADD_DMI_ATTR(bios_vendor, DMI_BIOS_VENDOR);
ADD_DMI_ATTR(bios_version, DMI_BIOS_VERSION);
ADD_DMI_ATTR(bios_date, DMI_BIOS_DATE);
ADD_DMI_ATTR(sys_vendor, DMI_SYS_VENDOR);
ADD_DMI_ATTR(product_name, DMI_PRODUCT_NAME);
ADD_DMI_ATTR(product_version, DMI_PRODUCT_VERSION);
ADD_DMI_ATTR(product_serial, DMI_PRODUCT_SERIAL);
ADD_DMI_ATTR(product_uuid, DMI_PRODUCT_UUID);
ADD_DMI_ATTR(board_vendor, DMI_BOARD_VENDOR);
ADD_DMI_ATTR(board_name, DMI_BOARD_NAME);
ADD_DMI_ATTR(board_version, DMI_BOARD_VERSION);
ADD_DMI_ATTR(board_serial, DMI_BOARD_SERIAL);
ADD_DMI_ATTR(board_asset_tag, DMI_BOARD_ASSET_TAG);
ADD_DMI_ATTR(chassis_vendor, DMI_CHASSIS_VENDOR);
ADD_DMI_ATTR(chassis_type, DMI_CHASSIS_TYPE);
ADD_DMI_ATTR(chassis_version, DMI_CHASSIS_VERSION);
ADD_DMI_ATTR(chassis_serial, DMI_CHASSIS_SERIAL);
ADD_DMI_ATTR(chassis_asset_tag, DMI_CHASSIS_ASSET_TAG);
sys_dmi_attributes[i++] = &sys_dmi_modalias_attr.attr;
}
static int __init dmi_id_init(void)
{
int ret;
if (!dmi_available)
return -ENODEV;
dmi_id_init_attr_table();
ret = class_register(&dmi_class);
if (ret)
return ret;
dmi_dev = kzalloc(sizeof(*dmi_dev), GFP_KERNEL);
if (!dmi_dev) {
ret = -ENOMEM;
goto fail_class_unregister;
}
dmi_dev->class = &dmi_class;
strcpy(dmi_dev->bus_id, "id");
dmi_dev->groups = sys_dmi_attribute_groups;
ret = device_register(dmi_dev);
if (ret)
goto fail_class_unregister;
return 0;
fail_class_unregister:
class_unregister(&dmi_class);
return ret;
}
arch_initcall(dmi_id_init);
|
