2 * Copyright (c) 2018 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
17 #include <vlib/vlib.h>
19 #include <vlib/unix/unix.h>
21 #include <vppinfra/elog.h>
23 vlib_log_main_t log_main = {
24 .default_log_level = VLIB_LOG_LEVEL_NOTICE,
25 .default_syslog_log_level = VLIB_LOG_LEVEL_WARNING,
29 .default_rate_limit = 50,
33 VLIB_REGISTER_LOG_CLASS (log_log, static) = {
38 static const int colors[] = {
39 [VLIB_LOG_LEVEL_EMERG] = 1, /* red */
40 [VLIB_LOG_LEVEL_ALERT] = 1, /* red */
41 [VLIB_LOG_LEVEL_CRIT] = 1, /* red */
42 [VLIB_LOG_LEVEL_ERR] = 1, /* red */
43 [VLIB_LOG_LEVEL_WARNING] = 3, /* yellow */
44 [VLIB_LOG_LEVEL_NOTICE] = 2, /* green */
45 [VLIB_LOG_LEVEL_INFO] = 4, /* blue */
46 [VLIB_LOG_LEVEL_DEBUG] = 6, /* cyan */
49 static const int log_level_to_syslog_priority[] = {
50 [VLIB_LOG_LEVEL_EMERG] = LOG_EMERG,
51 [VLIB_LOG_LEVEL_ALERT] = LOG_ALERT,
52 [VLIB_LOG_LEVEL_CRIT] = LOG_CRIT,
53 [VLIB_LOG_LEVEL_ERR] = LOG_ERR,
54 [VLIB_LOG_LEVEL_WARNING] = LOG_WARNING,
55 [VLIB_LOG_LEVEL_NOTICE] = LOG_NOTICE,
56 [VLIB_LOG_LEVEL_INFO] = LOG_INFO,
57 [VLIB_LOG_LEVEL_DEBUG] = LOG_DEBUG,
58 [VLIB_LOG_LEVEL_DISABLED] = LOG_DEBUG,
64 vlib_log_main_t *lm = &log_main;
67 i = lm->next - lm->count;
74 static vlib_log_class_data_t *
75 get_class_data (vlib_log_class_t ci)
77 vlib_log_main_t *lm = &log_main;
78 return vec_elt_at_index (lm->classes, (ci >> 16));
81 static vlib_log_subclass_data_t *
82 get_subclass_data (vlib_log_class_t ci)
84 vlib_log_class_data_t *c = get_class_data (ci);
85 return vec_elt_at_index (c->subclasses, (ci & 0xffff));
89 format_vlib_log_class (u8 * s, va_list * args)
91 vlib_log_class_t ci = va_arg (*args, vlib_log_class_t);
92 vlib_log_class_data_t *c = get_class_data (ci);
93 vlib_log_subclass_data_t *sc = get_subclass_data (ci);
96 return format (s, "%v/%v", c->name, sc->name);
98 return format (s, "%v", c->name, 0);
102 format_indent (u8 * s, va_list * args)
104 u8 *v = va_arg (*args, u8 *);
105 u32 indent = va_arg (*args, u32);
113 for (u32 i = 0; i < indent; i++)
114 vec_add1 (s, (u8) ' ');
121 log_level_is_enabled (vlib_log_level_t level, vlib_log_level_t configured)
123 if (configured == VLIB_LOG_LEVEL_DISABLED)
125 if (level > configured)
131 vlib_log (vlib_log_level_t level, vlib_log_class_t class, char *fmt, ...)
133 vlib_main_t *vm = vlib_get_main ();
134 vlib_log_main_t *lm = &log_main;
136 vlib_log_subclass_data_t *sc = get_subclass_data (class);
138 f64 t = vlib_time_now (vm);
139 f64 delta = t - sc->last_event_timestamp;
140 int log_enabled = log_level_is_enabled (level, sc->level);
141 int syslog_enabled = log_level_is_enabled (level, sc->syslog_level);
144 /* make sure we are running on the main thread to avoid use in dataplane
145 code, for dataplane logging consider use of event-logger */
146 ASSERT (vlib_get_thread_index () == 0);
148 if ((log_enabled || syslog_enabled) == 0)
151 vec_validate (lm->entries, lm->size);
153 if ((delta > lm->unthrottle_time) ||
154 (sc->is_throttling == 0 && (delta > 1)))
156 sc->last_event_timestamp = t;
157 sc->last_sec_count = 0;
158 sc->is_throttling = 0;
162 sc->last_sec_count++;
163 if (sc->last_sec_count > sc->rate_limit)
165 else if (sc->last_sec_count == sc->rate_limit)
167 vec_reset_length (s);
168 s = format (s, "--- message(s) throttled ---");
169 sc->is_throttling = 1;
176 s = va_format (s, fmt, &va);
183 if (unix_main.flags & (UNIX_FLAG_INTERACTIVE | UNIX_FLAG_NOSYSLOG))
186 int with_colors = (unix_main.flags & UNIX_FLAG_NOCOLOR) == 0;
190 l = format (l, "\x1b[%um", 90 + colors[level]);
191 indent = vec_len (l);
193 fmt = format (0, "%%-%uU [%%-6U]: ", lm->max_class_name_length);
194 vec_terminate_c_string (fmt);
195 l = format (l, (char *) fmt, format_vlib_log_class, class,
196 format_vlib_log_level, level);
198 indent = vec_len (l) - indent;
200 l = format (l, "\x1b[0m");
201 l = format (l, "%U", format_indent, s, indent);
202 fformat (stderr, "%v\n", l);
207 l = format (l, "%U", format_vlib_log_class, class);
208 int prio = log_level_to_syslog_priority[level];
209 int is_term = vec_c_string_is_terminated (l) ? 1 : 0;
211 syslog (prio, "%.*s: %.*s", (int) vec_len (l), l,
212 (int) vec_len (s) - is_term, s);
219 e = vec_elt_at_index (lm->entries, lm->next);
220 vec_free (e->string);
230 ELOG_TYPE_DECLARE(ee) =
232 .format = "log-%s: %s",
233 .format_args = "t4T4",
252 ed = ELOG_DATA (&vlib_global_main.elog_main, ee);
253 ed->log_level = level;
255 elog_string (&vlib_global_main.elog_main, "%v%c", e->string, 0);
258 lm->next = (lm->next + 1) % lm->size;
259 if (lm->size > lm->count)
266 static vlib_log_class_t
267 vlib_log_register_class_internal (char *class, char *subclass, u32 limit)
269 vlib_log_main_t *lm = &log_main;
270 vlib_log_class_data_t *c = NULL;
271 vlib_log_subclass_data_t *s;
272 vlib_log_class_data_t *tmp;
273 vlib_log_class_config_t *cc = 0, *scc = 0;
278 if ((p = hash_get_mem (lm->config_index_by_name, class)))
279 cc = vec_elt_at_index (lm->configs, p[0]);
281 str = format (0, "%s/%s%c", class, subclass, 0);
282 if ((p = hash_get_mem (lm->config_index_by_name, (char *) str)))
283 scc = vec_elt_at_index (lm->configs, p[0]);
286 vec_foreach (tmp, lm->classes)
288 if (vec_len (tmp->name) != strlen (class))
290 if (!memcmp (class, tmp->name, vec_len (tmp->name)))
298 vec_add2 (lm->classes, c, 1);
299 c->index = c - lm->classes;
300 c->name = format (0, "%s", class);
302 length = vec_len (c->name);
304 vec_add2 (c->subclasses, s, 1);
305 s->index = s - c->subclasses;
306 s->name = subclass ? format (0, "%s", subclass) : 0;
308 if (scc && scc->rate_limit != ~0)
309 s->rate_limit = scc->rate_limit;
310 else if (cc && cc->rate_limit != ~0)
311 s->rate_limit = cc->rate_limit;
313 s->rate_limit = limit;
315 s->rate_limit = lm->default_rate_limit;
317 if (scc && scc->level != ~0)
318 s->level = scc->level;
319 else if (cc && cc->level != ~0)
320 s->level = cc->level;
322 s->level = lm->default_log_level;
324 if (scc && scc->syslog_level != ~0)
325 s->syslog_level = scc->syslog_level;
326 else if (cc && cc->syslog_level != ~0)
327 s->syslog_level = cc->syslog_level;
329 s->syslog_level = lm->default_syslog_log_level;
332 length += 1 + vec_len (s->name);
333 if (length > lm->max_class_name_length)
334 lm->max_class_name_length = length;
335 return (c->index << 16) | (s->index);
339 vlib_log_register_class (char *class, char *subclass)
341 return vlib_log_register_class_internal (class, subclass,
342 0 /* default rate limit */ );
346 vlib_log_register_class_rate_limit (char *class, char *subclass, u32 limit)
348 return vlib_log_register_class_internal (class, subclass, limit);
353 format_vlib_log_level (u8 * s, va_list * args)
355 vlib_log_level_t i = va_arg (*args, vlib_log_level_t);
360 #define _(uc,lc) case VLIB_LOG_LEVEL_##uc: t = #lc; break;
361 foreach_vlib_log_level
364 return format (s, "unknown");
366 return format (s, "%s", t);
370 vlib_log_init (vlib_main_t *vm)
372 vlib_log_main_t *lm = &log_main;
373 vlib_log_class_registration_t *r = lm->registrations;
375 gettimeofday (&lm->time_zero_timeval, 0);
376 lm->time_zero = vlib_time_now (vm);
378 vec_validate (lm->entries, lm->size);
382 r->class = vlib_log_register_class (r->class_name, r->subclass_name);
383 if (r->default_level)
384 get_subclass_data (r->class)->level = r->default_level;
385 if (r->default_syslog_level)
386 get_subclass_data (r->class)->syslog_level = r->default_syslog_level;
390 r = lm->registrations;
393 vlib_log_debug (r->class, "initialized");
399 static clib_error_t *
400 show_log (vlib_main_t * vm,
401 unformat_input_t * input, vlib_cli_command_t * cmd)
403 clib_error_t *error = 0;
404 vlib_log_main_t *lm = &log_main;
406 int i = last_log_entry ();
407 int count = lm->count;
410 time_offset = (f64) lm->time_zero_timeval.tv_sec
411 + (((f64) lm->time_zero_timeval.tv_usec) * 1e-6) - lm->time_zero;
415 e = vec_elt_at_index (lm->entries, i);
416 vlib_cli_output (vm, "%U %-10U %-14U %v",
417 format_time_float, 0, e->timestamp + time_offset,
418 format_vlib_log_level, e->level,
419 format_vlib_log_class, e->class, e->string);
420 i = (i + 1) % lm->size;
427 VLIB_CLI_COMMAND (cli_show_log, static) = {
428 .path = "show logging",
429 .short_help = "show logging",
430 .function = show_log,
434 static clib_error_t *
435 show_log_config (vlib_main_t * vm,
436 unformat_input_t * input, vlib_cli_command_t * cmd)
438 clib_error_t *error = 0;
439 vlib_log_main_t *lm = &log_main;
440 vlib_log_class_data_t *c;
441 vlib_log_subclass_data_t *sc;
443 vlib_cli_output (vm, "%-20s %u entries", "Buffer Size:", lm->size);
444 vlib_cli_output (vm, "Defaults:\n");
445 vlib_cli_output (vm, "%-20s %U", " Log Level:",
446 format_vlib_log_level, lm->default_log_level);
447 vlib_cli_output (vm, "%-20s %U", " Syslog Log Level:",
448 format_vlib_log_level, lm->default_syslog_log_level);
449 vlib_cli_output (vm, "%-20s %u msgs/sec", " Rate Limit:",
450 lm->default_rate_limit);
451 vlib_cli_output (vm, "\n");
452 vlib_cli_output (vm, "%-22s %-14s %-14s %s",
453 "Class/Subclass", "Level", "Syslog Level", "Rate Limit");
456 u8 *defstr = format (0, "default");
457 vec_foreach (c, lm->classes)
459 vlib_cli_output (vm, "%v", c->name);
460 vec_foreach (sc, c->subclasses)
462 vlib_cli_output (vm, " %-20v %-14U %-14U %d",
463 sc->name ? sc->name : defstr,
464 format_vlib_log_level, sc->level,
465 format_vlib_log_level, sc->syslog_level,
475 VLIB_CLI_COMMAND (cli_show_log_config, static) = {
476 .path = "show logging configuration",
477 .short_help = "show logging configuration",
478 .function = show_log_config,
482 static clib_error_t *
483 clear_log (vlib_main_t * vm,
484 unformat_input_t * input, vlib_cli_command_t * cmd)
486 clib_error_t *error = 0;
487 vlib_log_main_t *lm = &log_main;
489 int i = last_log_entry ();
490 int count = lm->count;
494 e = vec_elt_at_index (lm->entries, i);
495 vec_free (e->string);
496 i = (i + 1) % lm->size;
501 vlib_log_info (log_log.class, "log cleared");
506 VLIB_CLI_COMMAND (cli_clear_log, static) = {
507 .path = "clear logging",
508 .short_help = "clear logging",
509 .function = clear_log,
514 unformat_vlib_log_level (unformat_input_t * input, va_list * args)
516 vlib_log_level_t *level = va_arg (*args, vlib_log_level_t *);
517 u8 *level_str = NULL;
519 if (unformat (input, "%s", &level_str))
522 const char __##uc[] = #lc; \
523 if (!strcmp ((const char *) level_str, __##uc)) \
525 *level = VLIB_LOG_LEVEL_##uc; \
529 foreach_vlib_log_level;
534 vec_free (level_str);
539 unformat_vlib_log_class (unformat_input_t * input, va_list * args)
541 vlib_log_class_data_t **class = va_arg (*args, vlib_log_class_data_t **);
543 u8 *class_str = NULL;
544 vlib_log_main_t *lm = &log_main;
545 if (unformat (input, "%v", &class_str))
547 vlib_log_class_data_t *cdata;
548 vec_foreach (cdata, lm->classes)
550 if (vec_is_equal (cdata->name, class_str))
558 vec_free (class_str);
562 static clib_error_t *
563 set_log_class (vlib_main_t * vm,
564 unformat_input_t * input, vlib_cli_command_t * cmd)
566 unformat_input_t _line_input, *line_input = &_line_input;
567 clib_error_t *rv = NULL;
569 bool set_rate_limit = false;
570 bool set_level = false;
571 bool set_syslog_level = false;
572 vlib_log_level_t level;
573 vlib_log_level_t syslog_level;
575 /* Get a line of input. */
576 if (!unformat_user (input, unformat_line_input, line_input))
579 vlib_log_class_data_t *class = NULL;
580 if (!unformat (line_input, "%U", unformat_vlib_log_class, &class))
582 return clib_error_return (0, "unknown log class `%U'",
583 format_unformat_error, line_input);
585 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
587 if (unformat (line_input, "rate-limit %d", &rate_limit))
589 set_rate_limit = true;
593 (line_input, "level %U", unformat_vlib_log_level, &level))
599 (line_input, "syslog-level %U", unformat_vlib_log_level,
602 set_syslog_level = true;
606 return clib_error_return (0, "unknown input `%U'",
607 format_unformat_error, line_input);
613 vlib_log_subclass_data_t *subclass;
614 vec_foreach (subclass, class->subclasses)
616 subclass->level = level;
619 if (set_syslog_level)
621 vlib_log_subclass_data_t *subclass;
622 vec_foreach (subclass, class->subclasses)
624 subclass->syslog_level = syslog_level;
629 vlib_log_subclass_data_t *subclass;
630 vec_foreach (subclass, class->subclasses)
632 subclass->rate_limit = rate_limit;
640 VLIB_CLI_COMMAND (cli_set_log, static) = {
641 .path = "set logging class",
642 .short_help = "set logging class <class> [rate-limit <int>] "
643 "[level <level>] [syslog-level <level>]",
644 .function = set_log_class,
648 static clib_error_t *
649 set_log_unth_time (vlib_main_t * vm,
650 unformat_input_t * input, vlib_cli_command_t * cmd)
652 unformat_input_t _line_input, *line_input = &_line_input;
653 clib_error_t *rv = NULL;
655 vlib_log_main_t *lm = &log_main;
657 /* Get a line of input. */
658 if (!unformat_user (input, unformat_line_input, line_input))
661 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
663 if (unformat (line_input, "%d", &unthrottle_time))
664 lm->unthrottle_time = unthrottle_time;
666 return clib_error_return (0, "unknown input `%U'",
667 format_unformat_error, line_input);
674 VLIB_CLI_COMMAND (cli_set_log_params, static) = {
675 .path = "set logging unthrottle-time",
676 .short_help = "set logging unthrottle-time <int>",
677 .function = set_log_unth_time,
681 static clib_error_t *
682 set_log_size (vlib_main_t * vm,
683 unformat_input_t * input, vlib_cli_command_t * cmd)
685 unformat_input_t _line_input, *line_input = &_line_input;
686 clib_error_t *rv = NULL;
688 vlib_log_main_t *lm = &log_main;
690 /* Get a line of input. */
691 if (!unformat_user (input, unformat_line_input, line_input))
694 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
696 if (unformat (line_input, "%d", &size))
699 vec_validate (lm->entries, lm->size);
702 return clib_error_return (0, "unknown input `%U'",
703 format_unformat_error, line_input);
710 VLIB_CLI_COMMAND (cli_set_log_size, static) = {
711 .path = "set logging size",
712 .short_help = "set logging size <int>",
713 .function = set_log_size,
718 unformat_vlib_log_subclass (unformat_input_t * input, va_list * args)
720 vlib_log_class_data_t *class = va_arg (*args, vlib_log_class_data_t *);
721 vlib_log_subclass_data_t **subclass =
722 va_arg (*args, vlib_log_subclass_data_t **);
724 u8 *subclass_str = NULL;
725 if (unformat (input, "%v", &subclass_str))
727 vlib_log_subclass_data_t *scdata;
728 vec_foreach (scdata, class->subclasses)
730 if (vec_is_equal (scdata->name, subclass_str))
738 vec_free (subclass_str);
742 static clib_error_t *
743 test_log_class_subclass (vlib_main_t * vm,
744 unformat_input_t * input, vlib_cli_command_t * cmd)
746 unformat_input_t _line_input, *line_input = &_line_input;
747 /* Get a line of input. */
748 if (!unformat_user (input, unformat_line_input, line_input))
751 vlib_log_class_data_t *class = NULL;
752 vlib_log_subclass_data_t *subclass = NULL;
753 vlib_log_level_t level;
754 if (unformat (line_input, "%U", unformat_vlib_log_level, &level))
756 if (unformat (line_input, "%U", unformat_vlib_log_class, &class))
759 (line_input, "%U", unformat_vlib_log_subclass, class,
763 (class->index << 16) | (subclass->index), "%U",
764 format_unformat_input, line_input);
768 return clib_error_return (0,
769 "unknown log subclass near beginning of `%U'",
770 format_unformat_error, line_input);
775 return clib_error_return (0,
776 "unknown log class near beginning of `%U'",
777 format_unformat_error, line_input);
782 return clib_error_return (0, "unknown log level near beginning of `%U'",
783 format_unformat_error, line_input);
789 VLIB_CLI_COMMAND (cli_test_log, static) = {
791 .short_help = "test log <level> <class> <subclass> <message>",
792 .function = test_log_class_subclass,
796 static clib_error_t *
797 log_config_class (vlib_main_t * vm, char *name, unformat_input_t * input)
799 vlib_log_main_t *lm = &log_main;
800 vlib_log_class_config_t *cc, tmp;
803 if (lm->config_index_by_name == 0)
804 lm->config_index_by_name = hash_create_string (0, sizeof (uword));
806 p = hash_get_mem (lm->config_index_by_name, name);
809 return clib_error_return (0, "logging class '%s' already configured",
812 clib_memset_u8 (&tmp, 0xff, sizeof (vlib_log_class_config_t));
814 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
816 if (unformat (input, "level %U", unformat_vlib_log_level, &tmp.level))
818 else if (unformat (input, "syslog-level %U", unformat_vlib_log_level,
821 else if (unformat (input, "rate-limit %u", &tmp.rate_limit))
824 return clib_error_return (0, "unknown input '%U'",
825 format_unformat_error, input);
828 vec_add2 (lm->configs, cc, 1);
829 clib_memcpy_fast (cc, &tmp, sizeof (vlib_log_class_config_t));
831 hash_set_mem (lm->config_index_by_name, name, cc - lm->configs);
835 static clib_error_t *
836 log_config (vlib_main_t * vm, unformat_input_t * input)
838 vlib_log_main_t *lm = &log_main;
839 unformat_input_t sub_input;
842 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
844 if (unformat (input, "size %d", &lm->size))
845 vec_validate (lm->entries, lm->size);
846 else if (unformat (input, "unthrottle-time %d", &lm->unthrottle_time))
848 else if (unformat (input, "default-log-level %U",
849 unformat_vlib_log_level, &lm->default_log_level))
851 else if (unformat (input, "default-syslog-log-level %U",
852 unformat_vlib_log_level,
853 &lm->default_syslog_log_level))
855 else if (unformat (input, "add-to-elog"))
857 else if (unformat (input, "class %s %U", &class,
858 unformat_vlib_cli_sub_input, &sub_input))
861 err = log_config_class (vm, (char *) class, &sub_input);
863 unformat_free (&sub_input);
869 return unformat_parse_error (input);
876 VLIB_EARLY_CONFIG_FUNCTION (log_config, "logging");
879 * fd.io coding-style-patch-verification: ON
882 * eval: (c-set-style "gnu")