ceph/src/spdk/dpdk/lib/librte_eal/common/eal_common_log.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2010-2014 Intel Corporation
   3  */
   4
   5 #include <stdio.h>
   6 #include <stdint.h>
   7 #include <stdarg.h>
   8 #include <stdlib.h>
   9 #include <string.h>
  10 #include <errno.h>
  11 #include <regex.h>
  12 #include <fnmatch.h>
  13
  14 #include <rte_eal.h>
  15 #include <rte_log.h>
  16 #include <rte_per_lcore.h>
  17
  18 #include "eal_private.h"
  19
  20 /* global log structure */
  21 struct rte_logs rte_logs = {
  22         .type = ~0,
  23         .level = RTE_LOG_DEBUG,
  24         .file = NULL,
  25 };
  26
  27 struct rte_eal_opt_loglevel {
  28         /** Next list entry */
  29         TAILQ_ENTRY(rte_eal_opt_loglevel) next;
  30         /** Compiled regular expression obtained from the option */
  31         regex_t re_match;
  32         /** Globbing pattern option */
  33         char *pattern;
  34         /** Log level value obtained from the option */
  35         uint32_t level;
  36 };
  37
  38 TAILQ_HEAD(rte_eal_opt_loglevel_list, rte_eal_opt_loglevel);
  39
  40 /** List of valid EAL log level options */
  41 static struct rte_eal_opt_loglevel_list opt_loglevel_list =
  42         TAILQ_HEAD_INITIALIZER(opt_loglevel_list);
  43
  44 /* Stream to use for logging if rte_logs.file is NULL */
  45 static FILE *default_log_stream;
  46
  47 /**
  48  * This global structure stores some information about the message
  49  * that is currently being processed by one lcore
  50  */
  51 struct log_cur_msg {
  52         uint32_t loglevel; /**< log level - see rte_log.h */
  53         uint32_t logtype;  /**< log type  - see rte_log.h */
  54 };
  55
  56 struct rte_log_dynamic_type {
  57         const char *name;
  58         uint32_t loglevel;
  59 };
  60
  61  /* per core log */
  62 static RTE_DEFINE_PER_LCORE(struct log_cur_msg, log_cur_msg);
  63
  64 /* default logs */
  65
  66 /* Change the stream that will be used by logging system */
  67 int
  68 rte_openlog_stream(FILE *f)
  69 {
  70         rte_logs.file = f;
  71         return 0;
  72 }
  73
  74 FILE *
  75 rte_log_get_stream(void)
  76 {
  77         FILE *f = rte_logs.file;
  78
  79         if (f == NULL) {
  80                 /*
  81                  * Grab the current value of stderr here, rather than
  82                  * just initializing default_log_stream to stderr. This
  83                  * ensures that we will always use the current value
  84                  * of stderr, even if the application closes and
  85                  * reopens it.
  86                  */
  87                 return default_log_stream ? : stderr;
  88         }
  89         return f;
  90 }
  91
  92 /* Set global log level */
  93 void
  94 rte_log_set_global_level(uint32_t level)
  95 {
  96         rte_logs.level = (uint32_t)level;
  97 }
  98
  99 /* Get global log level */
 100 uint32_t
 101 rte_log_get_global_level(void)
 102 {
 103         return rte_logs.level;
 104 }
 105
 106 int
 107 rte_log_get_level(uint32_t type)
 108 {
 109         if (type >= rte_logs.dynamic_types_len)
 110                 return -1;
 111
 112         return rte_logs.dynamic_types[type].loglevel;
 113 }
 114
 115 bool
 116 rte_log_can_log(uint32_t logtype, uint32_t level)
 117 {
 118         int log_level;
 119
 120         if (level > rte_log_get_global_level())
 121                 return false;
 122
 123         log_level = rte_log_get_level(logtype);
 124         if (log_level < 0)
 125                 return false;
 126
 127         if (level > (uint32_t)log_level)
 128                 return false;
 129
 130         return true;
 131 }
 132
 133 int
 134 rte_log_set_level(uint32_t type, uint32_t level)
 135 {
 136         if (type >= rte_logs.dynamic_types_len)
 137                 return -1;
 138         if (level > RTE_LOG_DEBUG)
 139                 return -1;
 140
 141         rte_logs.dynamic_types[type].loglevel = level;
 142
 143         return 0;
 144 }
 145
 146 /* set log level by regular expression */
 147 int
 148 rte_log_set_level_regexp(const char *regex, uint32_t level)
 149 {
 150         regex_t r;
 151         size_t i;
 152
 153         if (level > RTE_LOG_DEBUG)
 154                 return -1;
 155
 156         if (regcomp(&r, regex, 0) != 0)
 157                 return -1;
 158
 159         for (i = 0; i < rte_logs.dynamic_types_len; i++) {
 160                 if (rte_logs.dynamic_types[i].name == NULL)
 161                         continue;
 162                 if (regexec(&r, rte_logs.dynamic_types[i].name, 0,
 163                                 NULL, 0) == 0)
 164                         rte_logs.dynamic_types[i].loglevel = level;
 165         }
 166
 167         regfree(&r);
 168
 169         return 0;
 170 }
 171
 172 /*
 173  * Save the type string and the loglevel for later dynamic
 174  * logtypes which may register later.
 175  */
 176 static int rte_log_save_level(int priority,
 177                               const char *regex, const char *pattern)
 178 {
 179         struct rte_eal_opt_loglevel *opt_ll = NULL;
 180
 181         opt_ll = malloc(sizeof(*opt_ll));
 182         if (opt_ll == NULL)
 183                 goto fail;
 184
 185         opt_ll->level = priority;
 186
 187         if (regex) {
 188                 opt_ll->pattern = NULL;
 189                 if (regcomp(&opt_ll->re_match, regex, 0) != 0)
 190                         goto fail;
 191         } else if (pattern) {
 192                 opt_ll->pattern = strdup(pattern);
 193                 if (opt_ll->pattern == NULL)
 194                         goto fail;
 195         } else
 196                 goto fail;
 197
 198         TAILQ_INSERT_HEAD(&opt_loglevel_list, opt_ll, next);
 199         return 0;
 200 fail:
 201         free(opt_ll);
 202         return -1;
 203 }
 204
 205 int rte_log_save_regexp(const char *regex, int tmp)
 206 {
 207         return rte_log_save_level(tmp, regex, NULL);
 208 }
 209
 210 /* set log level based on globbing pattern */
 211 int
 212 rte_log_set_level_pattern(const char *pattern, uint32_t level)
 213 {
 214         size_t i;
 215
 216         if (level > RTE_LOG_DEBUG)
 217                 return -1;
 218
 219         for (i = 0; i < rte_logs.dynamic_types_len; i++) {
 220                 if (rte_logs.dynamic_types[i].name == NULL)
 221                         continue;
 222
 223                 if (fnmatch(pattern, rte_logs.dynamic_types[i].name, 0) == 0)
 224                         rte_logs.dynamic_types[i].loglevel = level;
 225         }
 226
 227         return 0;
 228 }
 229
 230 int rte_log_save_pattern(const char *pattern, int priority)
 231 {
 232         return rte_log_save_level(priority, NULL, pattern);
 233 }
 234
 235 /* get the current loglevel for the message being processed */
 236 int rte_log_cur_msg_loglevel(void)
 237 {
 238         return RTE_PER_LCORE(log_cur_msg).loglevel;
 239 }
 240
 241 /* get the current logtype for the message being processed */
 242 int rte_log_cur_msg_logtype(void)
 243 {
 244         return RTE_PER_LCORE(log_cur_msg).logtype;
 245 }
 246
 247 static int
 248 rte_log_lookup(const char *name)
 249 {
 250         size_t i;
 251
 252         for (i = 0; i < rte_logs.dynamic_types_len; i++) {
 253                 if (rte_logs.dynamic_types[i].name == NULL)
 254                         continue;
 255                 if (strcmp(name, rte_logs.dynamic_types[i].name) == 0)
 256                         return i;
 257         }
 258
 259         return -1;
 260 }
 261
 262 /* register an extended log type, assuming table is large enough, and id
 263  * is not yet registered.
 264  */
 265 static int
 266 __rte_log_register(const char *name, int id)
 267 {
 268         char *dup_name = strdup(name);
 269
 270         if (dup_name == NULL)
 271                 return -ENOMEM;
 272
 273         rte_logs.dynamic_types[id].name = dup_name;
 274         rte_logs.dynamic_types[id].loglevel = RTE_LOG_INFO;
 275
 276         return id;
 277 }
 278
 279 /* register an extended log type */
 280 int
 281 rte_log_register(const char *name)
 282 {
 283         struct rte_log_dynamic_type *new_dynamic_types;
 284         int id, ret;
 285
 286         id = rte_log_lookup(name);
 287         if (id >= 0)
 288                 return id;
 289
 290         new_dynamic_types = realloc(rte_logs.dynamic_types,
 291                 sizeof(struct rte_log_dynamic_type) *
 292                 (rte_logs.dynamic_types_len + 1));
 293         if (new_dynamic_types == NULL)
 294                 return -ENOMEM;
 295         rte_logs.dynamic_types = new_dynamic_types;
 296
 297         ret = __rte_log_register(name, rte_logs.dynamic_types_len);
 298         if (ret < 0)
 299                 return ret;
 300
 301         rte_logs.dynamic_types_len++;
 302
 303         return ret;
 304 }
 305
 306 /* Register an extended log type and try to pick its level from EAL options */
 307 int
 308 rte_log_register_type_and_pick_level(const char *name, uint32_t level_def)
 309 {
 310         struct rte_eal_opt_loglevel *opt_ll;
 311         uint32_t level = level_def;
 312         int type;
 313
 314         type = rte_log_register(name);
 315         if (type < 0)
 316                 return type;
 317
 318         TAILQ_FOREACH(opt_ll, &opt_loglevel_list, next) {
 319                 if (opt_ll->level > RTE_LOG_DEBUG)
 320                         continue;
 321
 322                 if (opt_ll->pattern) {
 323                         if (fnmatch(opt_ll->pattern, name, 0) == 0)
 324                                 level = opt_ll->level;
 325                 } else {
 326                         if (regexec(&opt_ll->re_match, name, 0, NULL, 0) == 0)
 327                                 level = opt_ll->level;
 328                 }
 329         }
 330
 331         rte_logs.dynamic_types[type].loglevel = level;
 332
 333         return type;
 334 }
 335
 336 struct logtype {
 337         uint32_t log_id;
 338         const char *logtype;
 339 };
 340
 341 static const struct logtype logtype_strings[] = {
 342         {RTE_LOGTYPE_EAL,        "lib.eal"},
 343         {RTE_LOGTYPE_MALLOC,     "lib.malloc"},
 344         {RTE_LOGTYPE_RING,       "lib.ring"},
 345         {RTE_LOGTYPE_MEMPOOL,    "lib.mempool"},
 346         {RTE_LOGTYPE_TIMER,      "lib.timer"},
 347         {RTE_LOGTYPE_PMD,        "pmd"},
 348         {RTE_LOGTYPE_HASH,       "lib.hash"},
 349         {RTE_LOGTYPE_LPM,        "lib.lpm"},
 350         {RTE_LOGTYPE_KNI,        "lib.kni"},
 351         {RTE_LOGTYPE_ACL,        "lib.acl"},
 352         {RTE_LOGTYPE_POWER,      "lib.power"},
 353         {RTE_LOGTYPE_METER,      "lib.meter"},
 354         {RTE_LOGTYPE_SCHED,      "lib.sched"},
 355         {RTE_LOGTYPE_PORT,       "lib.port"},
 356         {RTE_LOGTYPE_TABLE,      "lib.table"},
 357         {RTE_LOGTYPE_PIPELINE,   "lib.pipeline"},
 358         {RTE_LOGTYPE_MBUF,       "lib.mbuf"},
 359         {RTE_LOGTYPE_CRYPTODEV,  "lib.cryptodev"},
 360         {RTE_LOGTYPE_EFD,        "lib.efd"},
 361         {RTE_LOGTYPE_EVENTDEV,   "lib.eventdev"},
 362         {RTE_LOGTYPE_GSO,        "lib.gso"},
 363         {RTE_LOGTYPE_USER1,      "user1"},
 364         {RTE_LOGTYPE_USER2,      "user2"},
 365         {RTE_LOGTYPE_USER3,      "user3"},
 366         {RTE_LOGTYPE_USER4,      "user4"},
 367         {RTE_LOGTYPE_USER5,      "user5"},
 368         {RTE_LOGTYPE_USER6,      "user6"},
 369         {RTE_LOGTYPE_USER7,      "user7"},
 370         {RTE_LOGTYPE_USER8,      "user8"}
 371 };
 372
 373 /* Logging should be first initializer (before drivers and bus) */
 374 RTE_INIT_PRIO(rte_log_init, LOG)
 375 {
 376         uint32_t i;
 377
 378         rte_log_set_global_level(RTE_LOG_DEBUG);
 379
 380         rte_logs.dynamic_types = calloc(RTE_LOGTYPE_FIRST_EXT_ID,
 381                 sizeof(struct rte_log_dynamic_type));
 382         if (rte_logs.dynamic_types == NULL)
 383                 return;
 384
 385         /* register legacy log types */
 386         for (i = 0; i < RTE_DIM(logtype_strings); i++)
 387                 __rte_log_register(logtype_strings[i].logtype,
 388                                 logtype_strings[i].log_id);
 389
 390         rte_logs.dynamic_types_len = RTE_LOGTYPE_FIRST_EXT_ID;
 391 }
 392
 393 static const char *
 394 loglevel_to_string(uint32_t level)
 395 {
 396         switch (level) {
 397         case 0: return "disabled";
 398         case RTE_LOG_EMERG: return "emerg";
 399         case RTE_LOG_ALERT: return "alert";
 400         case RTE_LOG_CRIT: return "critical";
 401         case RTE_LOG_ERR: return "error";
 402         case RTE_LOG_WARNING: return "warning";
 403         case RTE_LOG_NOTICE: return "notice";
 404         case RTE_LOG_INFO: return "info";
 405         case RTE_LOG_DEBUG: return "debug";
 406         default: return "unknown";
 407         }
 408 }
 409
 410 /* dump global level and registered log types */
 411 void
 412 rte_log_dump(FILE *f)
 413 {
 414         size_t i;
 415
 416         fprintf(f, "global log level is %s\n",
 417                 loglevel_to_string(rte_log_get_global_level()));
 418
 419         for (i = 0; i < rte_logs.dynamic_types_len; i++) {
 420                 if (rte_logs.dynamic_types[i].name == NULL)
 421                         continue;
 422                 fprintf(f, "id %zu: %s, level is %s\n",
 423                         i, rte_logs.dynamic_types[i].name,
 424                         loglevel_to_string(rte_logs.dynamic_types[i].loglevel));
 425         }
 426 }
 427
 428 /*
 429  * Generates a log message The message will be sent in the stream
 430  * defined by the previous call to rte_openlog_stream().
 431  */
 432 int
 433 rte_vlog(uint32_t level, uint32_t logtype, const char *format, va_list ap)
 434 {
 435         FILE *f = rte_log_get_stream();
 436         int ret;
 437
 438         if (logtype >= rte_logs.dynamic_types_len)
 439                 return -1;
 440         if (!rte_log_can_log(logtype, level))
 441                 return 0;
 442
 443         /* save loglevel and logtype in a global per-lcore variable */
 444         RTE_PER_LCORE(log_cur_msg).loglevel = level;
 445         RTE_PER_LCORE(log_cur_msg).logtype = logtype;
 446
 447         ret = vfprintf(f, format, ap);
 448         fflush(f);
 449         return ret;
 450 }
 451
 452 /*
 453  * Generates a log message The message will be sent in the stream
 454  * defined by the previous call to rte_openlog_stream().
 455  * No need to check level here, done by rte_vlog().
 456  */
 457 int
 458 rte_log(uint32_t level, uint32_t logtype, const char *format, ...)
 459 {
 460         va_list ap;
 461         int ret;
 462
 463         va_start(ap, format);
 464         ret = rte_vlog(level, logtype, format, ap);
 465         va_end(ap);
 466         return ret;
 467 }
 468
 469 /*
 470  * Called by environment-specific initialization functions.
 471  */
 472 void
 473 eal_log_set_default(FILE *default_log)
 474 {
 475         default_log_stream = default_log;
 476
 477 #if RTE_LOG_DP_LEVEL >= RTE_LOG_DEBUG
 478         RTE_LOG(NOTICE, EAL,
 479                 "Debug dataplane logs available - lower performance\n");
 480 #endif
 481 }