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
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
|
// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2019 Mellanox Technologies. All rights reserved */
#include <linux/debugfs.h>
#include <linux/err.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include "netdevsim.h"
static int
nsim_dev_empty_reporter_dump(struct devlink_health_reporter *reporter,
struct devlink_fmsg *fmsg, void *priv_ctx,
struct netlink_ext_ack *extack)
{
return 0;
}
static int
nsim_dev_empty_reporter_diagnose(struct devlink_health_reporter *reporter,
struct devlink_fmsg *fmsg,
struct netlink_ext_ack *extack)
{
return 0;
}
static const
struct devlink_health_reporter_ops nsim_dev_empty_reporter_ops = {
.name = "empty",
.dump = nsim_dev_empty_reporter_dump,
.diagnose = nsim_dev_empty_reporter_diagnose,
};
struct nsim_dev_dummy_reporter_ctx {
char *break_msg;
};
static int
nsim_dev_dummy_reporter_recover(struct devlink_health_reporter *reporter,
void *priv_ctx,
struct netlink_ext_ack *extack)
{
struct nsim_dev_health *health = devlink_health_reporter_priv(reporter);
struct nsim_dev_dummy_reporter_ctx *ctx = priv_ctx;
if (health->fail_recover) {
/* For testing purposes, user set debugfs fail_recover
* value to true. Fail right away.
*/
NL_SET_ERR_MSG_MOD(extack, "User setup the recover to fail for testing purposes");
return -EINVAL;
}
if (ctx) {
kfree(health->recovered_break_msg);
health->recovered_break_msg = kstrdup(ctx->break_msg,
GFP_KERNEL);
if (!health->recovered_break_msg)
return -ENOMEM;
}
return 0;
}
static int nsim_dev_dummy_fmsg_put(struct devlink_fmsg *fmsg, u32 binary_len)
{
char *binary;
int err;
int i;
err = devlink_fmsg_bool_pair_put(fmsg, "test_bool", true);
if (err)
return err;
err = devlink_fmsg_u8_pair_put(fmsg, "test_u8", 1);
if (err)
return err;
err = devlink_fmsg_u32_pair_put(fmsg, "test_u32", 3);
if (err)
return err;
err = devlink_fmsg_u64_pair_put(fmsg, "test_u64", 4);
if (err)
return err;
err = devlink_fmsg_string_pair_put(fmsg, "test_string", "somestring");
if (err)
return err;
binary = kmalloc(binary_len, GFP_KERNEL | __GFP_NOWARN);
if (!binary)
return -ENOMEM;
get_random_bytes(binary, binary_len);
err = devlink_fmsg_binary_pair_put(fmsg, "test_binary", binary, binary_len);
kfree(binary);
if (err)
return err;
err = devlink_fmsg_pair_nest_start(fmsg, "test_nest");
if (err)
return err;
err = devlink_fmsg_obj_nest_start(fmsg);
if (err)
return err;
err = devlink_fmsg_bool_pair_put(fmsg, "nested_test_bool", false);
if (err)
return err;
err = devlink_fmsg_u8_pair_put(fmsg, "nested_test_u8", false);
if (err)
return err;
err = devlink_fmsg_obj_nest_end(fmsg);
if (err)
return err;
err = devlink_fmsg_pair_nest_end(fmsg);
if (err)
return err;
err = devlink_fmsg_arr_pair_nest_start(fmsg, "test_bool_array");
if (err)
return err;
for (i = 0; i < 10; i++) {
err = devlink_fmsg_bool_put(fmsg, true);
if (err)
return err;
}
err = devlink_fmsg_arr_pair_nest_end(fmsg);
if (err)
return err;
err = devlink_fmsg_arr_pair_nest_start(fmsg, "test_u8_array");
if (err)
return err;
for (i = 0; i < 10; i++) {
err = devlink_fmsg_u8_put(fmsg, i);
if (err)
return err;
}
err = devlink_fmsg_arr_pair_nest_end(fmsg);
if (err)
return err;
err = devlink_fmsg_arr_pair_nest_start(fmsg, "test_u32_array");
if (err)
return err;
for (i = 0; i < 10; i++) {
err = devlink_fmsg_u32_put(fmsg, i);
if (err)
return err;
}
err = devlink_fmsg_arr_pair_nest_end(fmsg);
if (err)
return err;
err = devlink_fmsg_arr_pair_nest_start(fmsg, "test_u64_array");
if (err)
return err;
for (i = 0; i < 10; i++) {
err = devlink_fmsg_u64_put(fmsg, i);
if (err)
return err;
}
err = devlink_fmsg_arr_pair_nest_end(fmsg);
if (err)
return err;
err = devlink_fmsg_arr_pair_nest_start(fmsg, "test_array_of_objects");
if (err)
return err;
for (i = 0; i < 10; i++) {
err = devlink_fmsg_obj_nest_start(fmsg);
if (err)
return err;
err = devlink_fmsg_bool_pair_put(fmsg,
"in_array_nested_test_bool",
false);
if (err)
return err;
err = devlink_fmsg_u8_pair_put(fmsg,
"in_array_nested_test_u8",
i);
if (err)
return err;
err = devlink_fmsg_obj_nest_end(fmsg);
if (err)
return err;
}
return devlink_fmsg_arr_pair_nest_end(fmsg);
}
static int
nsim_dev_dummy_reporter_dump(struct devlink_health_reporter *reporter,
struct devlink_fmsg *fmsg, void *priv_ctx,
struct netlink_ext_ack *extack)
{
struct nsim_dev_health *health = devlink_health_reporter_priv(reporter);
struct nsim_dev_dummy_reporter_ctx *ctx = priv_ctx;
int err;
if (ctx) {
err = devlink_fmsg_string_pair_put(fmsg, "break_message",
ctx->break_msg);
if (err)
return err;
}
return nsim_dev_dummy_fmsg_put(fmsg, health->binary_len);
}
static int
nsim_dev_dummy_reporter_diagnose(struct devlink_health_reporter *reporter,
struct devlink_fmsg *fmsg,
struct netlink_ext_ack *extack)
{
struct nsim_dev_health *health = devlink_health_reporter_priv(reporter);
int err;
if (health->recovered_break_msg) {
err = devlink_fmsg_string_pair_put(fmsg,
"recovered_break_message",
health->recovered_break_msg);
if (err)
return err;
}
return nsim_dev_dummy_fmsg_put(fmsg, health->binary_len);
}
static const
struct devlink_health_reporter_ops nsim_dev_dummy_reporter_ops = {
.name = "dummy",
.recover = nsim_dev_dummy_reporter_recover,
.dump = nsim_dev_dummy_reporter_dump,
.diagnose = nsim_dev_dummy_reporter_diagnose,
};
static ssize_t nsim_dev_health_break_write(struct file *file,
const char __user *data,
size_t count, loff_t *ppos)
{
struct nsim_dev_health *health = file->private_data;
struct nsim_dev_dummy_reporter_ctx ctx;
char *break_msg;
int err;
break_msg = kmalloc(count + 1, GFP_KERNEL);
if (!break_msg)
return -ENOMEM;
if (copy_from_user(break_msg, data, count)) {
err = -EFAULT;
goto out;
}
break_msg[count] = '\0';
if (break_msg[count - 1] == '\n')
break_msg[count - 1] = '\0';
ctx.break_msg = break_msg;
err = devlink_health_report(health->dummy_reporter, break_msg, &ctx);
if (err)
goto out;
out:
kfree(break_msg);
return err ?: count;
}
static const struct file_operations nsim_dev_health_break_fops = {
.open = simple_open,
.write = nsim_dev_health_break_write,
.llseek = generic_file_llseek,
.owner = THIS_MODULE,
};
int nsim_dev_health_init(struct nsim_dev *nsim_dev, struct devlink *devlink)
{
struct nsim_dev_health *health = &nsim_dev->health;
int err;
health->empty_reporter =
devlink_health_reporter_create(devlink,
&nsim_dev_empty_reporter_ops,
0, health);
if (IS_ERR(health->empty_reporter))
return PTR_ERR(health->empty_reporter);
health->dummy_reporter =
devlink_health_reporter_create(devlink,
&nsim_dev_dummy_reporter_ops,
0, health);
if (IS_ERR(health->dummy_reporter)) {
err = PTR_ERR(health->dummy_reporter);
goto err_empty_reporter_destroy;
}
health->ddir = debugfs_create_dir("health", nsim_dev->ddir);
if (IS_ERR(health->ddir)) {
err = PTR_ERR(health->ddir);
goto err_dummy_reporter_destroy;
}
health->recovered_break_msg = NULL;
debugfs_create_file("break_health", 0200, health->ddir, health,
&nsim_dev_health_break_fops);
health->binary_len = 16;
debugfs_create_u32("binary_len", 0600, health->ddir,
&health->binary_len);
health->fail_recover = false;
debugfs_create_bool("fail_recover", 0600, health->ddir,
&health->fail_recover);
return 0;
err_dummy_reporter_destroy:
devlink_health_reporter_destroy(health->dummy_reporter);
err_empty_reporter_destroy:
devlink_health_reporter_destroy(health->empty_reporter);
return err;
}
void nsim_dev_health_exit(struct nsim_dev *nsim_dev)
{
struct nsim_dev_health *health = &nsim_dev->health;
debugfs_remove_recursive(health->ddir);
kfree(health->recovered_break_msg);
devlink_health_reporter_destroy(health->dummy_reporter);
devlink_health_reporter_destroy(health->empty_reporter);
}
|
