summaryrefslogtreecommitdiffstats
path: root/lib/librte_eal/common/eal_common_log.c
blob: 37b2e20e539bca7a28772b06d8eecd4f3a6ddfb4 (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
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
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
/* SPDX-License-Identifier: BSD-3-Clause
 * Copyright(c) 2010-2014 Intel Corporation
 */

#include <stdio.h>
#include <stdint.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <regex.h>

#include <rte_eal.h>
#include <rte_log.h>
#include <rte_per_lcore.h>

#include "eal_private.h"

/* global log structure */
struct rte_logs rte_logs = {
	.type = ~0,
	.level = RTE_LOG_DEBUG,
	.file = NULL,
};

/* Stream to use for logging if rte_logs.file is NULL */
static FILE *default_log_stream;

/**
 * This global structure stores some informations about the message
 * that is currently being processed by one lcore
 */
struct log_cur_msg {
	uint32_t loglevel; /**< log level - see rte_log.h */
	uint32_t logtype;  /**< log type  - see rte_log.h */
};

struct rte_log_dynamic_type {
	const char *name;
	uint32_t loglevel;
};

 /* per core log */
static RTE_DEFINE_PER_LCORE(struct log_cur_msg, log_cur_msg);

/* default logs */

/* Change the stream that will be used by logging system */
int
rte_openlog_stream(FILE *f)
{
	rte_logs.file = f;
	return 0;
}

/* Set global log level */
void
rte_log_set_global_level(uint32_t level)
{
	rte_logs.level = (uint32_t)level;
}

/* Get global log level */
uint32_t
rte_log_get_global_level(void)
{
	return rte_logs.level;
}

int
rte_log_get_level(uint32_t type)
{
	if (type >= rte_logs.dynamic_types_len)
		return -1;

	return rte_logs.dynamic_types[type].loglevel;
}

int
rte_log_set_level(uint32_t type, uint32_t level)
{
	if (type >= rte_logs.dynamic_types_len)
		return -1;
	if (level > RTE_LOG_DEBUG)
		return -1;

	rte_logs.dynamic_types[type].loglevel = level;

	return 0;
}

/* set level */
int
rte_log_set_level_regexp(const char *pattern, uint32_t level)
{
	regex_t r;
	size_t i;

	if (level > RTE_LOG_DEBUG)
		return -1;

	if (regcomp(&r, pattern, 0) != 0)
		return -1;

	for (i = 0; i < rte_logs.dynamic_types_len; i++) {
		if (rte_logs.dynamic_types[i].name == NULL)
			continue;
		if (regexec(&r, rte_logs.dynamic_types[i].name, 0,
				NULL, 0) == 0)
			rte_logs.dynamic_types[i].loglevel = level;
	}

	regfree(&r);

	return 0;
}

/* get the current loglevel for the message being processed */
int rte_log_cur_msg_loglevel(void)
{
	return RTE_PER_LCORE(log_cur_msg).loglevel;
}

/* get the current logtype for the message being processed */
int rte_log_cur_msg_logtype(void)
{
	return RTE_PER_LCORE(log_cur_msg).logtype;
}

static int
rte_log_lookup(const char *name)
{
	size_t i;

	for (i = 0; i < rte_logs.dynamic_types_len; i++) {
		if (rte_logs.dynamic_types[i].name == NULL)
			continue;
		if (strcmp(name, rte_logs.dynamic_types[i].name) == 0)
			return i;
	}

	return -1;
}

/* register an extended log type, assuming table is large enough, and id
 * is not yet registered.
 */
static int
__rte_log_register(const char *name, int id)
{
	char *dup_name = strdup(name);

	if (dup_name == NULL)
		return -ENOMEM;

	rte_logs.dynamic_types[id].name = dup_name;
	rte_logs.dynamic_types[id].loglevel = RTE_LOG_INFO;

	return id;
}

/* register an extended log type */
int
rte_log_register(const char *name)
{
	struct rte_log_dynamic_type *new_dynamic_types;
	int id, ret;

	id = rte_log_lookup(name);
	if (id >= 0)
		return id;

	new_dynamic_types = realloc(rte_logs.dynamic_types,
		sizeof(struct rte_log_dynamic_type) *
		(rte_logs.dynamic_types_len + 1));
	if (new_dynamic_types == NULL)
		return -ENOMEM;
	rte_logs.dynamic_types = new_dynamic_types;

	ret = __rte_log_register(name, rte_logs.dynamic_types_len);
	if (ret < 0)
		return ret;

	rte_logs.dynamic_types_len++;

	return ret;
}

struct logtype {
	uint32_t log_id;
	const char *logtype;
};

static const struct logtype logtype_strings[] = {
	{RTE_LOGTYPE_EAL,        "lib.eal"},
	{RTE_LOGTYPE_MALLOC,     "lib.malloc"},
	{RTE_LOGTYPE_RING,       "lib.ring"},
	{RTE_LOGTYPE_MEMPOOL,    "lib.mempool"},
	{RTE_LOGTYPE_TIMER,      "lib.timer"},
	{RTE_LOGTYPE_PMD,        "pmd"},
	{RTE_LOGTYPE_HASH,       "lib.hash"},
	{RTE_LOGTYPE_LPM,        "lib.lpm"},
	{RTE_LOGTYPE_KNI,        "lib.kni"},
	{RTE_LOGTYPE_ACL,        "lib.acl"},
	{RTE_LOGTYPE_POWER,      "lib.power"},
	{RTE_LOGTYPE_METER,      "lib.meter"},
	{RTE_LOGTYPE_SCHED,      "lib.sched"},
	{RTE_LOGTYPE_PORT,       "lib.port"},
	{RTE_LOGTYPE_TABLE,      "lib.table"},
	{RTE_LOGTYPE_PIPELINE,   "lib.pipeline"},
	{RTE_LOGTYPE_MBUF,       "lib.mbuf"},
	{RTE_LOGTYPE_CRYPTODEV,  "lib.cryptodev"},
	{RTE_LOGTYPE_EFD,        "lib.efd"},
	{RTE_LOGTYPE_EVENTDEV,   "lib.eventdev"},
	{RTE_LOGTYPE_GSO,        "lib.gso"},
	{RTE_LOGTYPE_USER1,      "user1"},
	{RTE_LOGTYPE_USER2,      "user2"},
	{RTE_LOGTYPE_USER3,      "user3"},
	{RTE_LOGTYPE_USER4,      "user4"},
	{RTE_LOGTYPE_USER5,      "user5"},
	{RTE_LOGTYPE_USER6,      "user6"},
	{RTE_LOGTYPE_USER7,      "user7"},
	{RTE_LOGTYPE_USER8,      "user8"}
};

/* Logging should be first initializer (before drivers and bus) */
RTE_INIT_PRIO(rte_log_init, 101);
static void
rte_log_init(void)
{
	uint32_t i;

	rte_log_set_global_level(RTE_LOG_DEBUG);

	rte_logs.dynamic_types = calloc(RTE_LOGTYPE_FIRST_EXT_ID,
		sizeof(struct rte_log_dynamic_type));
	if (rte_logs.dynamic_types == NULL)
		return;

	/* register legacy log types */
	for (i = 0; i < RTE_DIM(logtype_strings); i++)
		__rte_log_register(logtype_strings[i].logtype,
				logtype_strings[i].log_id);

	rte_logs.dynamic_types_len = RTE_LOGTYPE_FIRST_EXT_ID;
}

static const char *
loglevel_to_string(uint32_t level)
{
	switch (level) {
	case 0: return "disabled";
	case RTE_LOG_EMERG: return "emerg";
	case RTE_LOG_ALERT: return "alert";
	case RTE_LOG_CRIT: return "critical";
	case RTE_LOG_ERR: return "error";
	case RTE_LOG_WARNING: return "warning";
	case RTE_LOG_NOTICE: return "notice";
	case RTE_LOG_INFO: return "info";
	case RTE_LOG_DEBUG: return "debug";
	default: return "unknown";
	}
}

/* dump global level and registered log types */
void
rte_log_dump(FILE *f)
{
	size_t i;

	fprintf(f, "global log level is %s\n",
		loglevel_to_string(rte_log_get_global_level()));

	for (i = 0; i < rte_logs.dynamic_types_len; i++) {
		if (rte_logs.dynamic_types[i].name == NULL)
			continue;
		fprintf(f, "id %zu: %s, level is %s\n",
			i, rte_logs.dynamic_types[i].name,
			loglevel_to_string(rte_logs.dynamic_types[i].loglevel));
	}
}

/*
 * Generates a log message The message will be sent in the stream
 * defined by the previous call to rte_openlog_stream().
 */
int
rte_vlog(uint32_t level, uint32_t logtype, const char *format, va_list ap)
{
	int ret;
	FILE *f = rte_logs.file;
	if (f == NULL) {
		f = default_log_stream;
		if (f == NULL) {
			/*
			 * Grab the current value of stderr here, rather than
			 * just initializing default_log_stream to stderr. This
			 * ensures that we will always use the current value
			 * of stderr, even if the application closes and
			 * reopens it.
			 */
			f = stderr;
		}
	}

	if (level > rte_logs.level)
		return 0;
	if (logtype >= rte_logs.dynamic_types_len)
		return -1;
	if (level > rte_logs.dynamic_types[logtype].loglevel)
		return 0;

	/* save loglevel and logtype in a global per-lcore variable */
	RTE_PER_LCORE(log_cur_msg).loglevel = level;
	RTE_PER_LCORE(log_cur_msg).logtype = logtype;

	ret = vfprintf(f, format, ap);
	fflush(f);
	return ret;
}

/*
 * Generates a log message The message will be sent in the stream
 * defined by the previous call to rte_openlog_stream().
 * No need to check level here, done by rte_vlog().
 */
int
rte_log(uint32_t level, uint32_t logtype, const char *format, ...)
{
	va_list ap;
	int ret;

	va_start(ap, format);
	ret = rte_vlog(level, logtype, format, ap);
	va_end(ap);
	return ret;
}

/*
 * Called by environment-specific initialization functions.
 */
void
eal_log_set_default(FILE *default_log)
{
	default_log_stream = default_log;

#if RTE_LOG_DP_LEVEL >= RTE_LOG_DEBUG
	RTE_LOG(NOTICE, EAL,
		"Debug dataplane logs available - lower performance\n");
#endif
}