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
|
// SPDX-License-Identifier: GPL-2.0-only
/* Copyright (c) 2019, The Linux Foundation. All rights reserved. */
#define pr_fmt(fmt) "cnss_genl: " fmt
#include <linux/err.h>
#include <linux/module.h>
#include <linux/delay.h>
#include <net/netlink.h>
#include <net/genetlink.h>
#include "main.h"
#include "debug.h"
#define CNSS_GENL_FAMILY_NAME "cnss-genl"
#define CNSS_GENL_MCAST_GROUP_NAME "cnss-genl-grp"
#define CNSS_GENL_VERSION 1
#define CNSS_GENL_DATA_LEN_MAX (15 * 1024)
#define CNSS_GENL_STR_LEN_MAX 16
enum {
CNSS_GENL_ATTR_MSG_UNSPEC,
CNSS_GENL_ATTR_MSG_TYPE,
CNSS_GENL_ATTR_MSG_FILE_NAME,
CNSS_GENL_ATTR_MSG_TOTAL_SIZE,
CNSS_GENL_ATTR_MSG_SEG_ID,
CNSS_GENL_ATTR_MSG_END,
CNSS_GENL_ATTR_MSG_DATA_LEN,
CNSS_GENL_ATTR_MSG_DATA,
__CNSS_GENL_ATTR_MAX,
};
#define CNSS_GENL_ATTR_MAX (__CNSS_GENL_ATTR_MAX - 1)
enum {
CNSS_GENL_CMD_UNSPEC,
CNSS_GENL_CMD_MSG,
__CNSS_GENL_CMD_MAX,
};
#define CNSS_GENL_CMD_MAX (__CNSS_GENL_CMD_MAX - 1)
static struct nla_policy cnss_genl_msg_policy[CNSS_GENL_ATTR_MAX + 1] = {
[CNSS_GENL_ATTR_MSG_TYPE] = { .type = NLA_U8 },
[CNSS_GENL_ATTR_MSG_FILE_NAME] = { .type = NLA_NUL_STRING,
.len = CNSS_GENL_STR_LEN_MAX },
[CNSS_GENL_ATTR_MSG_TOTAL_SIZE] = { .type = NLA_U32 },
[CNSS_GENL_ATTR_MSG_SEG_ID] = { .type = NLA_U32 },
[CNSS_GENL_ATTR_MSG_END] = { .type = NLA_U8 },
[CNSS_GENL_ATTR_MSG_DATA_LEN] = { .type = NLA_U32 },
[CNSS_GENL_ATTR_MSG_DATA] = { .type = NLA_BINARY,
.len = CNSS_GENL_DATA_LEN_MAX },
};
static int cnss_genl_process_msg(struct sk_buff *skb, struct genl_info *info)
{
return 0;
}
static struct genl_ops cnss_genl_ops[] = {
{
.cmd = CNSS_GENL_CMD_MSG,
.doit = cnss_genl_process_msg,
},
};
static struct genl_multicast_group cnss_genl_mcast_grp[] = {
{
.name = CNSS_GENL_MCAST_GROUP_NAME,
},
};
static struct genl_family cnss_genl_family = {
.id = 0,
.hdrsize = 0,
.name = CNSS_GENL_FAMILY_NAME,
.version = CNSS_GENL_VERSION,
.maxattr = CNSS_GENL_ATTR_MAX,
.policy = cnss_genl_msg_policy,
.module = THIS_MODULE,
.ops = cnss_genl_ops,
.n_ops = ARRAY_SIZE(cnss_genl_ops),
.mcgrps = cnss_genl_mcast_grp,
.n_mcgrps = ARRAY_SIZE(cnss_genl_mcast_grp),
};
static int cnss_genl_send_data(u8 type, char *file_name, u32 total_size,
u32 seg_id, u8 end, u32 data_len, u8 *msg_buff)
{
struct sk_buff *skb = NULL;
void *msg_header = NULL;
int ret = 0;
char filename[CNSS_GENL_STR_LEN_MAX + 1];
cnss_pr_dbg("type: %u, file_name %s, total_size: %x, seg_id %u, end %u, data_len %u\n",
type, file_name, total_size, seg_id, end, data_len);
if (!file_name)
strlcpy(filename, "default", sizeof(filename));
else
strlcpy(filename, file_name, sizeof(filename));
skb = genlmsg_new(NLMSG_HDRLEN +
nla_total_size(sizeof(type)) +
nla_total_size(strlen(filename) + 1) +
nla_total_size(sizeof(total_size)) +
nla_total_size(sizeof(seg_id)) +
nla_total_size(sizeof(end)) +
nla_total_size(sizeof(data_len)) +
nla_total_size(data_len), GFP_KERNEL);
if (!skb)
return -ENOMEM;
msg_header = genlmsg_put(skb, 0, 0,
&cnss_genl_family, 0,
CNSS_GENL_CMD_MSG);
if (!msg_header) {
ret = -ENOMEM;
goto fail;
}
ret = nla_put_u8(skb, CNSS_GENL_ATTR_MSG_TYPE, type);
if (ret < 0)
goto fail;
ret = nla_put_string(skb, CNSS_GENL_ATTR_MSG_FILE_NAME, filename);
if (ret < 0)
goto fail;
ret = nla_put_u32(skb, CNSS_GENL_ATTR_MSG_TOTAL_SIZE, total_size);
if (ret < 0)
goto fail;
ret = nla_put_u32(skb, CNSS_GENL_ATTR_MSG_SEG_ID, seg_id);
if (ret < 0)
goto fail;
ret = nla_put_u8(skb, CNSS_GENL_ATTR_MSG_END, end);
if (ret < 0)
goto fail;
ret = nla_put_u32(skb, CNSS_GENL_ATTR_MSG_DATA_LEN, data_len);
if (ret < 0)
goto fail;
ret = nla_put(skb, CNSS_GENL_ATTR_MSG_DATA, data_len, msg_buff);
if (ret < 0)
goto fail;
genlmsg_end(skb, msg_header);
ret = genlmsg_multicast(&cnss_genl_family, skb, 0, 0, GFP_KERNEL);
if (ret < 0)
cnss_pr_err("Fail to send genl msg: %d\n", ret);
return ret;
fail:
cnss_pr_err("Fail to generate genl msg: %d\n", ret);
if (skb)
nlmsg_free(skb);
return ret;
}
int cnss_genl_send_msg(void *buff, u8 type, char *file_name, u32 total_size)
{
int ret = 0;
u8 *msg_buff = buff;
u32 remaining = total_size;
u32 seg_id = 0;
u32 data_len = 0;
u8 end = 0;
u8 retry;
cnss_pr_dbg("type: %u, total_size: %x\n", type, total_size);
while (remaining) {
if (remaining > CNSS_GENL_DATA_LEN_MAX) {
data_len = CNSS_GENL_DATA_LEN_MAX;
} else {
data_len = remaining;
end = 1;
}
for (retry = 0; retry < 2; retry++) {
ret = cnss_genl_send_data(type, file_name, total_size,
seg_id, end, data_len,
msg_buff);
if (ret >= 0)
break;
msleep(100);
}
if (ret < 0) {
cnss_pr_err("fail to send genl data, ret %d\n", ret);
return ret;
}
remaining -= data_len;
msg_buff += data_len;
seg_id++;
}
return ret;
}
int cnss_genl_init(void)
{
int ret = 0;
ret = genl_register_family(&cnss_genl_family);
if (ret != 0)
cnss_pr_err("genl_register_family fail: %d\n", ret);
return ret;
}
void cnss_genl_exit(void)
{
genl_unregister_family(&cnss_genl_family);
}
|
