src/common/mi-lttng.c

   1 /*
   2  * Copyright (C) 2014 - Jonathan Rajotte <jonathan.r.julien@gmail.com>
   3  *                    - Olivier Cotte <olivier.cotte@polymtl.ca>
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License, version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
  12  * more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along with
  15  * this program; if not, write to the Free Software Foundation, Inc., 51
  16  * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  17  */
  18
  19
  20 #include <include/config.h>
  21 #include <common/config/config.h>
  22 #include "mi-lttng.h"
  23
  24 #include <assert.h>
  25
  26 /* Strings related to command */
  27 const char * const mi_lttng_element_command = "command";
  28 const char * const mi_lttng_element_command_version = "version";
  29 const char * const mi_lttng_element_command_list = "list";
  30 const char * const mi_lttng_element_command_name = "name";
  31 const char * const mi_lttng_element_command_output = "output";
  32
  33 /* Strings related to command: version */
  34 const char * const mi_lttng_element_version = "version";
  35 const char * const mi_lttng_element_version_str = "string";
  36 const char * const mi_lttng_element_version_web = "url";
  37 const char * const mi_lttng_element_version_major = "major";
  38 const char * const mi_lttng_element_version_minor = "minor";
  39 const char * const mi_lttng_element_version_license = "license";
  40 const char * const mi_lttng_element_version_patch_level = "patchLevel";
  41 const char * const mi_lttng_element_version_description = "description";
  42
  43 /* Strings related to pid */
  44 const char * const mi_lttng_element_pids = "pids";
  45 const char * const mi_lttng_element_pid = "pid";
  46 const char * const mi_lttng_element_pid_id = "id";
  47
  48 /* String related to a lttng_event_field */
  49 const char * const mi_lttng_element_event_field = "event_field";
  50 const char * const mi_lttng_element_event_fields = "event_fields";
  51
  52 /* General elements of mi_lttng */
  53 const char * const mi_lttng_element_type_other = "OTHER";
  54 const char * const mi_lttng_element_type_integer = "INTEGER";
  55 const char * const mi_lttng_element_type_enum = "ENUM";
  56 const char * const mi_lttng_element_type_float = "FLOAT";
  57 const char * const mi_lttng_element_type_string = "STRING";
  58 const char * const mi_lttng_element_nowrite = "nowrite";
  59
  60 /* String related to loglevel */
  61 const char * const mi_lttng_loglevel_str_alert = "TRACE_ALERT";
  62 const char * const mi_lttng_loglevel_str_crit = "TRACE_CRIT";
  63 const char * const mi_lttng_loglevel_str_debug = "TRACE_DEBUG";
  64 const char * const mi_lttng_loglevel_str_debug_function = "TRACE_DEBUG_FUNCTION";
  65 const char * const mi_lttng_loglevel_str_debug_line = "TRACE_DEBUG_LINE";
  66 const char * const mi_lttng_loglevel_str_debug_module = "TRACE_DEBUG_MODULE";
  67 const char * const mi_lttng_loglevel_str_debug_process = "TRACE_DEBUG_PROCESS";
  68 const char * const mi_lttng_loglevel_str_debug_program = "TRACE_DEBUG_PROGRAM";
  69 const char * const mi_lttng_loglevel_str_debug_system = "TRACE_DEBUG_SYSTEM";
  70 const char * const mi_lttng_loglevel_str_debug_unit = "TRACE_DEBUG_UNIT";
  71 const char * const mi_lttng_loglevel_str_emerg = "TRACE_EMERG";
  72 const char * const mi_lttng_loglevel_str_err = "TRACE_ERR";
  73 const char * const mi_lttng_loglevel_str_info = "TRACE_INFO";
  74 const char * const mi_lttng_loglevel_str_notice = "TRACE_NOTICE";
  75 const char * const mi_lttng_loglevel_str_unknown = "UNKNOWN";
  76 const char * const mi_lttng_loglevel_str_warning = "TRACE_WARNING";
  77
  78 const char * const mi_lttng_loglevel_type_all = "ALL";
  79 const char * const mi_lttng_loglevel_type_range = "RANGE";
  80 const char * const mi_lttng_loglevel_type_single = "SINGLE";
  81 const char * const mi_lttng_loglevel_type_unknown = "UNKNOWN";
  82
  83 const char * const mi_lttng_element_empty = "";
  84
  85 const char *mi_lttng_loglevel_string(int value)
  86 {
  87         switch (value) {
  88         case -1:
  89                 return mi_lttng_element_empty;
  90         case LTTNG_LOGLEVEL_EMERG:
  91                 return mi_lttng_loglevel_str_emerg;
  92         case LTTNG_LOGLEVEL_ALERT:
  93                 return mi_lttng_loglevel_str_alert;
  94         case LTTNG_LOGLEVEL_CRIT:
  95                 return mi_lttng_loglevel_str_crit;
  96         case LTTNG_LOGLEVEL_ERR:
  97                 return mi_lttng_loglevel_str_err;
  98         case LTTNG_LOGLEVEL_WARNING:
  99                 return mi_lttng_loglevel_str_warning;
 100         case LTTNG_LOGLEVEL_NOTICE:
 101                 return mi_lttng_loglevel_str_notice;
 102         case LTTNG_LOGLEVEL_INFO:
 103                 return mi_lttng_loglevel_str_info;
 104         case LTTNG_LOGLEVEL_DEBUG_SYSTEM:
 105                 return mi_lttng_loglevel_str_debug_system;
 106         case LTTNG_LOGLEVEL_DEBUG_PROGRAM:
 107                 return mi_lttng_loglevel_str_debug_program;
 108         case LTTNG_LOGLEVEL_DEBUG_PROCESS:
 109                 return mi_lttng_loglevel_str_debug_process;
 110         case LTTNG_LOGLEVEL_DEBUG_MODULE:
 111                 return mi_lttng_loglevel_str_debug_module;
 112         case LTTNG_LOGLEVEL_DEBUG_UNIT:
 113                 return mi_lttng_loglevel_str_debug_unit;
 114         case LTTNG_LOGLEVEL_DEBUG_FUNCTION:
 115                 return mi_lttng_loglevel_str_debug_function;
 116         case LTTNG_LOGLEVEL_DEBUG_LINE:
 117                 return mi_lttng_loglevel_str_debug_line;
 118         case LTTNG_LOGLEVEL_DEBUG:
 119                 return mi_lttng_loglevel_str_debug;
 120         default:
 121                 return mi_lttng_loglevel_str_unknown;
 122         }
 123 }
 124
 125 const char *mi_lttng_logleveltype_string(enum lttng_loglevel_type value)
 126 {
 127         switch (value) {
 128         case LTTNG_EVENT_LOGLEVEL_ALL:
 129                 return mi_lttng_loglevel_type_all;
 130         case LTTNG_EVENT_LOGLEVEL_RANGE:
 131                 return mi_lttng_loglevel_type_range;
 132         case LTTNG_EVENT_LOGLEVEL_SINGLE:
 133                 return mi_lttng_loglevel_type_single;
 134         default:
 135                 return mi_lttng_loglevel_type_unknown;
 136         }
 137 }
 138
 139 const char *mi_lttng_eventtype_string(enum lttng_event_type value)
 140 {
 141         switch (value) {
 142         case LTTNG_EVENT_ALL:
 143                 return config_event_type_all;
 144         case LTTNG_EVENT_TRACEPOINT:
 145                 return config_event_type_tracepoint;
 146         case LTTNG_EVENT_PROBE:
 147                 return config_event_type_probe;
 148         case LTTNG_EVENT_FUNCTION:
 149                 return config_event_type_function;
 150         case LTTNG_EVENT_FUNCTION_ENTRY:
 151                 return config_event_type_function_entry;
 152         case LTTNG_EVENT_SYSCALL:
 153                 return config_event_type_syscall;
 154         case LTTNG_EVENT_NOOP:
 155                 return config_event_type_noop;
 156         default:
 157                 return mi_lttng_element_empty;
 158         }
 159 }
 160
 161 const char *mi_lttng_eventfieldtype_string(enum lttng_event_field_type val)
 162 {
 163         switch (val) {
 164         case(LTTNG_EVENT_FIELD_INTEGER):
 165                 return mi_lttng_element_type_integer;
 166         case(LTTNG_EVENT_FIELD_ENUM):
 167                 return mi_lttng_element_type_enum;
 168         case(LTTNG_EVENT_FIELD_FLOAT):
 169                 return mi_lttng_element_type_float;
 170         case(LTTNG_EVENT_FIELD_STRING):
 171                 return mi_lttng_element_type_string;
 172         default:
 173                 return mi_lttng_element_type_other;
 174         }
 175 }
 176
 177 const char *mi_lttng_domaintype_string(enum lttng_domain_type value)
 178 {
 179         /* Note: This is a *duplicate* of get_domain_str from bin/lttng/utils.c */
 180         switch (value) {
 181         case LTTNG_DOMAIN_KERNEL:
 182                 return config_domain_type_kernel;
 183         case LTTNG_DOMAIN_UST:
 184                 return config_domain_type_ust;
 185         case LTTNG_DOMAIN_JUL:
 186                 return config_domain_type_jul;
 187         default:
 188                 /* Should not have an unknown domain */
 189                 assert(0);
 190         }
 191 }
 192
 193 const char *mi_lttng_buffertype_string(enum lttng_buffer_type value)
 194 {
 195         switch (value) {
 196         case LTTNG_BUFFER_PER_PID:
 197                 return config_buffer_type_per_pid;
 198         case LTTNG_BUFFER_PER_UID:
 199                 return config_buffer_type_per_uid;
 200         case LTTNG_BUFFER_GLOBAL:
 201                 return config_buffer_type_global;
 202         default:
 203                 /* Should not have an unknow buffer type */
 204                 assert(0);
 205         }
 206 }
 207
 208 LTTNG_HIDDEN
 209 struct mi_writer *mi_lttng_writer_create(int fd_output, int mi_output_type)
 210 {
 211         struct mi_writer *mi_writer;
 212
 213         mi_writer = zmalloc(sizeof(struct mi_writer));
 214         if (!mi_writer) {
 215                 PERROR("zmalloc mi_writer_create");
 216                 goto end;
 217         }
 218         if (mi_output_type == LTTNG_MI_XML) {
 219                 mi_writer->writer = config_writer_create(fd_output);
 220                 if (!mi_writer->writer) {
 221                         goto err_destroy;
 222                 }
 223                 mi_writer->type = LTTNG_MI_XML;
 224         } else {
 225                 goto err_destroy;
 226         }
 227
 228 end:
 229         return mi_writer;
 230
 231 err_destroy:
 232         free(mi_writer);
 233         return NULL;
 234 }
 235
 236 LTTNG_HIDDEN
 237 int mi_lttng_writer_destroy(struct mi_writer *writer)
 238 {
 239         int ret;
 240
 241         if (!writer) {
 242                 ret = -EINVAL;
 243                 goto end;
 244         }
 245
 246         ret = config_writer_destroy(writer->writer);
 247         if (ret < 0) {
 248                 goto end;
 249         }
 250
 251         free(writer);
 252 end:
 253         return ret;
 254 }
 255
 256 LTTNG_HIDDEN
 257 int mi_lttng_writer_command_open(struct mi_writer *writer, const char *command)
 258 {
 259         int ret;
 260
 261         ret = mi_lttng_writer_open_element(writer, mi_lttng_element_command);
 262         if (ret) {
 263                 goto end;
 264         }
 265         ret = mi_lttng_writer_write_element_string(writer,
 266                         mi_lttng_element_command_name, command);
 267 end:
 268         return ret;
 269 }
 270
 271 LTTNG_HIDDEN
 272 int mi_lttng_writer_command_close(struct mi_writer *writer)
 273 {
 274         return mi_lttng_writer_close_element(writer);
 275 }
 276
 277 LTTNG_HIDDEN
 278 int mi_lttng_writer_open_element(struct mi_writer *writer,
 279                 const char *element_name)
 280 {
 281         return config_writer_open_element(writer->writer, element_name);
 282 }
 283
 284 LTTNG_HIDDEN
 285 int mi_lttng_writer_close_element(struct mi_writer *writer)
 286 {
 287         return config_writer_close_element(writer->writer);
 288 }
 289
 290 LTTNG_HIDDEN
 291 int mi_lttng_close_multi_element(struct mi_writer *writer,
 292                 unsigned int nb_element)
 293 {
 294         int ret, i;
 295
 296         if (nb_element < 1) {
 297                 ret = 0;
 298                 goto end;
 299         }
 300         for (i = 0; i < nb_element; i++) {
 301                 ret = mi_lttng_writer_close_element(writer);
 302                 if (ret) {
 303                         goto end;
 304                 }
 305         }
 306 end:
 307         return ret;
 308 }
 309
 310 LTTNG_HIDDEN
 311 int mi_lttng_writer_write_element_unsigned_int(struct mi_writer *writer,
 312                 const char *element_name, uint64_t value)
 313 {
 314         return config_writer_write_element_unsigned_int(writer->writer,
 315                         element_name, value);
 316 }
 317
 318 LTTNG_HIDDEN
 319 int mi_lttng_writer_write_element_signed_int(struct mi_writer *writer,
 320                 const char *element_name, int64_t value)
 321 {
 322         return config_writer_write_element_signed_int(writer->writer,
 323                         element_name, value);
 324 }
 325
 326 LTTNG_HIDDEN
 327 int mi_lttng_writer_write_element_bool(struct mi_writer *writer,
 328                 const char *element_name, int value)
 329 {
 330         return config_writer_write_element_bool(writer->writer,
 331                         element_name, value);
 332 }
 333
 334 LTTNG_HIDDEN
 335 int mi_lttng_writer_write_element_string(struct mi_writer *writer,
 336                 const char *element_name, const char *value)
 337 {
 338         return config_writer_write_element_string(writer->writer,
 339                         element_name, value);
 340 }
 341
 342 LTTNG_HIDDEN
 343 int mi_lttng_version(struct mi_writer *writer, struct mi_lttng_version *version,
 344         const char *lttng_description, const char *lttng_license)
 345 {
 346         int ret;
 347
 348         /* Open version */
 349         ret = mi_lttng_writer_open_element(writer, mi_lttng_element_version);
 350         if (ret) {
 351                 goto end;
 352         }
 353
 354         /* Version string (contain info like rc etc.) */
 355         ret = mi_lttng_writer_write_element_string(writer,
 356                         mi_lttng_element_version_str, VERSION);
 357         if (ret) {
 358                 goto end;
 359         }
 360
 361         /* Major version number */
 362         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 363                         mi_lttng_element_version_major, version->version_major);
 364         if (ret) {
 365                 goto end;
 366         }
 367
 368         /* Minor version number */
 369         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 370                         mi_lttng_element_version_minor, version->version_minor);
 371         if (ret) {
 372                 goto end;
 373         }
 374
 375         /* Patch number */
 376         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 377                         mi_lttng_element_version_patch_level, version->version_patchlevel);
 378         if (ret) {
 379                 goto end;
 380         }
 381
 382         /* Name of the version */
 383         ret = mi_lttng_writer_write_element_string(writer,
 384                         config_element_name, version->version_name);
 385         if (ret) {
 386                 goto end;
 387         }
 388
 389         /* Description mostly related to beer... */
 390         ret = mi_lttng_writer_write_element_string(writer,
 391                         mi_lttng_element_version_description, lttng_description);
 392         if (ret) {
 393                 goto end;
 394         }
 395
 396         /* url */
 397         ret = mi_lttng_writer_write_element_string(writer,
 398                         mi_lttng_element_version_web, version->package_url);
 399         if (ret) {
 400                 goto end;
 401         }
 402
 403         /* License: free as in free beer...no...*speech* */
 404         ret = mi_lttng_writer_write_element_string(writer,
 405                         mi_lttng_element_version_license, lttng_license);
 406         if (ret) {
 407                 goto end;
 408         }
 409
 410         /* Close version element */
 411         ret = mi_lttng_writer_close_element(writer);
 412
 413 end:
 414         return ret;
 415 }
 416
 417 LTTNG_HIDDEN
 418 int mi_lttng_sessions_open(struct mi_writer *writer)
 419 {
 420         return mi_lttng_writer_open_element(writer, config_element_sessions);
 421 }
 422
 423 LTTNG_HIDDEN
 424 int mi_lttng_session(struct mi_writer *writer,
 425                 struct lttng_session *session, int is_open)
 426 {
 427         int ret;
 428
 429         assert(session);
 430
 431         /* Open sessions element */
 432         ret = mi_lttng_writer_open_element(writer,
 433                         config_element_session);
 434         if (ret) {
 435                 goto end;
 436         }
 437
 438         /* Name of the session */
 439         ret = mi_lttng_writer_write_element_string(writer,
 440                         config_element_name, session->name);
 441         if (ret) {
 442                 goto end;
 443         }
 444
 445         /* Path */
 446         ret = mi_lttng_writer_write_element_string(writer,
 447                         config_element_path, session->path);
 448         if (ret) {
 449                 goto end;
 450         }
 451
 452         /* Enabled ? */
 453         ret = mi_lttng_writer_write_element_bool(writer,
 454                         config_element_enabled, session->enabled);
 455         if (ret) {
 456                 goto end;
 457         }
 458
 459         /* Snapshot mode */
 460         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 461                         config_element_snapshot_mode, session->snapshot_mode);
 462         if (ret) {
 463                 goto end;
 464         }
 465
 466         /* Live timer interval in usec */
 467         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 468                         config_element_live_timer_interval,
 469                         session->live_timer_interval);
 470         if (ret) {
 471                 goto end;
 472         }
 473
 474         if (!is_open) {
 475                 /* Closing session element */
 476                 ret = mi_lttng_writer_close_element(writer);
 477         }
 478 end:
 479         return ret;
 480
 481 }
 482
 483 LTTNG_HIDDEN
 484 int mi_lttng_domains_open(struct mi_writer *writer)
 485 {
 486         return mi_lttng_writer_open_element(writer, config_element_domains);
 487 }
 488
 489 LTTNG_HIDDEN
 490 int mi_lttng_domain(struct mi_writer *writer,
 491                 struct lttng_domain *domain, int is_open)
 492 {
 493         int ret = 0;
 494         const char *str_domain;
 495         const char *str_buffer;
 496
 497         assert(domain);
 498
 499         /* Open domain element */
 500         ret = mi_lttng_writer_open_element(writer, config_element_domain);
 501         if (ret) {
 502                 goto end;
 503         }
 504
 505         /* Domain Type */
 506         str_domain = mi_lttng_domaintype_string(domain->type);
 507         ret = mi_lttng_writer_write_element_string(writer, config_element_type,
 508                         str_domain);
 509         if (ret) {
 510                 goto end;
 511         }
 512
 513         /* Buffer Type */
 514         str_buffer= mi_lttng_buffertype_string(domain->buf_type);
 515         ret = mi_lttng_writer_write_element_string(writer,
 516                         config_element_buffer_type, str_buffer);
 517         if (ret) {
 518                 goto end;
 519         }
 520
 521         /* TODO: attr... not sure how to use the union.... */
 522
 523         if (!is_open) {
 524                 /* Closing domain element */
 525                 ret = mi_lttng_writer_close_element(writer);
 526         }
 527
 528 end:
 529         return ret;
 530
 531 }
 532
 533 LTTNG_HIDDEN
 534 int mi_lttng_channels_open(struct mi_writer *writer)
 535 {
 536         return mi_lttng_writer_open_element(writer, config_element_channels);
 537 }
 538
 539 LTTNG_HIDDEN
 540 int mi_lttng_channel(struct mi_writer *writer,
 541                 struct lttng_channel *channel, int is_open)
 542 {
 543         int ret = 0;
 544
 545         assert(channel);
 546
 547         /* Opening channel element */
 548         ret = mi_lttng_writer_open_element(writer, config_element_channel);
 549         if (ret) {
 550                 goto end;
 551         }
 552
 553         /* Name */
 554         ret = mi_lttng_writer_write_element_string(writer, config_element_name,
 555                         channel->name);
 556         if (ret) {
 557                 goto end;
 558         }
 559
 560         /* Enabled ? */
 561         ret = mi_lttng_writer_write_element_bool(writer,
 562                         config_element_enabled, channel->enabled);
 563         if (ret) {
 564                 goto end;
 565         }
 566
 567         /* Attribute */
 568         ret = mi_lttng_channel_attr(writer, &channel->attr);
 569         if (ret) {
 570                 goto end;
 571         }
 572
 573         if (!is_open) {
 574                 /* Closing channel element */
 575                 ret = mi_lttng_writer_close_element(writer);
 576                 if (ret) {
 577                         goto end;
 578                 }
 579         }
 580 end:
 581         return ret;
 582 }
 583
 584 LTTNG_HIDDEN
 585 int mi_lttng_channel_attr(struct mi_writer *writer,
 586                 struct lttng_channel_attr *attr)
 587 {
 588         int ret = 0;
 589
 590         assert(attr);
 591
 592         /* Opening Attributes */
 593         ret = mi_lttng_writer_open_element(writer, config_element_attributes);
 594         if (ret) {
 595                 goto end;
 596         }
 597
 598         /* Overwrite */
 599         ret = mi_lttng_writer_write_element_string(writer,
 600                 config_element_overwrite_mode,
 601                 attr->overwrite ? config_overwrite_mode_overwrite :
 602                         config_overwrite_mode_discard);
 603         if (ret) {
 604                 goto end;
 605         }
 606
 607         /* Sub buffer size in byte */
 608         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 609                 config_element_subbuf_size, attr->subbuf_size);
 610         if (ret) {
 611                 goto end;
 612         }
 613
 614         /* Number of subbuffer (power of two) */
 615         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 616                 config_element_num_subbuf,
 617                 attr->num_subbuf);
 618         if (ret) {
 619                 goto end;
 620         }
 621
 622         /* Switch timer interval in usec */
 623         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 624                 config_element_switch_timer_interval,
 625                 attr->switch_timer_interval);
 626         if (ret) {
 627                 goto end;
 628         }
 629
 630         /* Read timer interval in usec */
 631         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 632                 config_element_read_timer_interval,
 633                 attr->read_timer_interval);
 634         if (ret) {
 635                 goto end;
 636         }
 637
 638         /* Event output */
 639         ret = mi_lttng_writer_write_element_string(writer,
 640                 config_element_output_type,
 641                 attr->output == LTTNG_EVENT_SPLICE ?
 642                 config_output_type_splice : config_output_type_mmap);
 643         if (ret) {
 644                 goto end;
 645         }
 646
 647         /* Tracefile size in bytes */
 648         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 649                 config_element_tracefile_size, attr->tracefile_size);
 650         if (ret) {
 651                 goto end;
 652         }
 653
 654         /* Count of tracefiles */
 655         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 656                 config_element_tracefile_count,
 657                 attr->tracefile_count);
 658         if (ret) {
 659                 goto end;
 660         }
 661
 662         /* Live timer interval in usec*/
 663         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 664                 config_element_live_timer_interval,
 665                 attr->live_timer_interval);
 666         if (ret) {
 667                 goto end;
 668         }
 669
 670         /* Closing attributes */
 671         ret = mi_lttng_writer_close_element(writer);
 672         if (ret) {
 673                 goto end;
 674         }
 675 end:
 676         return ret;
 677
 678 }
 679
 680 LTTNG_HIDDEN
 681 int mi_lttng_event_common_attributes(struct mi_writer *writer,
 682                 struct lttng_event *event)
 683 {
 684         int ret;
 685
 686         /* Open event element */
 687         ret = mi_lttng_writer_open_element(writer, config_element_event);
 688         if (ret) {
 689                 goto end;
 690         }
 691
 692         /* event name */
 693         ret = mi_lttng_writer_write_element_string(writer,
 694                         config_element_name, event->name);
 695         if (ret) {
 696                 goto end;
 697         }
 698
 699         /* event type */
 700         ret = mi_lttng_writer_write_element_string(writer,
 701                         config_element_type, mi_lttng_eventtype_string(event->type));
 702         if (ret) {
 703                 goto end;
 704         }
 705
 706         /* is event enabled */
 707         ret = mi_lttng_writer_write_element_bool(writer,
 708                         config_element_enabled, event->enabled);
 709         if (ret) {
 710                 goto end;
 711         }
 712
 713         /* event filter enabled? */
 714         ret = mi_lttng_writer_write_element_bool(writer,
 715                         config_element_filter, event->filter);
 716
 717 end:
 718         return ret;
 719 }
 720
 721 LTTNG_HIDDEN
 722 int mi_lttng_event_tracepoint_loglevel(struct mi_writer *writer,
 723                 struct lttng_event *event)
 724 {
 725         int ret;
 726
 727         /* event loglevel */
 728         ret = mi_lttng_writer_write_element_string(writer,
 729                         config_element_loglevel, mi_lttng_loglevel_string(event->loglevel));
 730         if (ret) {
 731                 goto end;
 732         }
 733
 734         ret = mi_lttng_writer_write_element_string(writer,
 735                         config_element_loglevel_type,
 736                         mi_lttng_logleveltype_string(event->loglevel_type));
 737         if (ret) {
 738                 goto end;
 739         }
 740
 741         /* event exclusion filter */
 742         ret = mi_lttng_writer_write_element_bool(writer,
 743                         config_element_exclusion, event->exclusion);
 744         if (ret) {
 745                 goto end;
 746         }
 747
 748 end:
 749         return ret;
 750 }
 751
 752 LTTNG_HIDDEN
 753 int mi_lttng_event_tracepoint_no_loglevel(struct mi_writer *writer,
 754                 struct lttng_event *event)
 755 {
 756         /* event exclusion filter */
 757         return mi_lttng_writer_write_element_bool(writer,
 758                         config_element_exclusion, event->exclusion);
 759 }
 760
 761 LTTNG_HIDDEN
 762 int mi_lttng_event_function_probe(struct mi_writer *writer,
 763                 struct lttng_event *event)
 764 {
 765         int ret;
 766
 767         if (event->attr.probe.addr != 0) {
 768                 /* event probe address */
 769                 ret = mi_lttng_writer_write_element_unsigned_int(writer,
 770                                 config_element_address, event->attr.probe.addr);
 771                 if (ret) {
 772                         goto end;
 773                 }
 774         } else {
 775                 /* event probe offset */
 776                 ret = mi_lttng_writer_write_element_unsigned_int(writer,
 777                                 config_element_offset, event->attr.probe.offset);
 778                 if (ret) {
 779                         goto end;
 780                 }
 781
 782                 /* event probe symbol_name */
 783                 ret = mi_lttng_writer_write_element_string(writer,
 784                                 config_element_symbol_name, event->attr.probe.symbol_name);
 785                 if (ret) {
 786                         goto end;
 787                 }
 788         }
 789 end:
 790         return ret;
 791 }
 792
 793 LTTNG_HIDDEN
 794 int mi_lttng_event_function_entry(struct mi_writer *writer,
 795                 struct lttng_event *event)
 796 {
 797         /* event probe symbol_name */
 798         return mi_lttng_writer_write_element_string(writer,
 799                         config_element_symbol_name, event->attr.ftrace.symbol_name);
 800 }
 801
 802 LTTNG_HIDDEN
 803 int mi_lttng_events_open(struct mi_writer *writer)
 804 {
 805         return mi_lttng_writer_open_element(writer, config_element_events);
 806 }
 807
 808 LTTNG_HIDDEN
 809 int mi_lttng_event(struct mi_writer *writer,
 810                 struct lttng_event *event, int is_open)
 811 {
 812         int ret;
 813
 814         ret = mi_lttng_event_common_attributes(writer, event);
 815         if (ret) {
 816                 goto end;
 817         }
 818
 819         switch (event->type) {
 820         case LTTNG_EVENT_ALL:
 821                 /* We should never have "all" events in list. */
 822                 assert(0);
 823                 break;
 824         case LTTNG_EVENT_TRACEPOINT:
 825         {
 826                 if (event->loglevel != -1) {
 827                         ret = mi_lttng_event_tracepoint_loglevel(writer, event);
 828                 } else {
 829                         ret = mi_lttng_event_tracepoint_no_loglevel(writer, event);
 830                 }
 831                 break;
 832         }
 833         case LTTNG_EVENT_PROBE:
 834                 ret = mi_lttng_event_function_probe(writer, event);
 835                 break;
 836         case LTTNG_EVENT_FUNCTION_ENTRY:
 837                 ret = mi_lttng_event_function_entry(writer, event);
 838                 break;
 839         default:
 840                 break;
 841         }
 842
 843         if (!is_open) {
 844                 ret = mi_lttng_writer_close_element(writer);
 845         }
 846
 847 end:
 848         return ret;
 849 }
 850
 851 LTTNG_HIDDEN
 852 int mi_lttng_pids_open(struct mi_writer *writer)
 853 {
 854         return mi_lttng_writer_open_element(writer, mi_lttng_element_pids);
 855 }
 856
 857 LTTNG_HIDDEN
 858 int mi_lttng_pid(struct mi_writer *writer, pid_t pid , const char *cmdline,
 859                 int is_open)
 860 {
 861         int ret;
 862
 863         /* Open element pid */
 864         ret = mi_lttng_writer_open_element(writer, mi_lttng_element_pid);
 865         if (ret) {
 866                 goto end;
 867         }
 868
 869         /* Writing pid number */
 870         ret = mi_lttng_writer_write_element_signed_int(writer,
 871                         mi_lttng_element_pid_id, (int)pid);
 872         if (ret) {
 873                 goto end;
 874         }
 875
 876         /* Writing name of the process */
 877         ret = mi_lttng_writer_write_element_string(writer, config_element_name,
 878                         cmdline);
 879         if (ret) {
 880                 goto end;
 881         }
 882
 883         if (!is_open) {
 884                 /* Closing Pid */
 885                 ret = mi_lttng_writer_close_element(writer);
 886         }
 887
 888 end:
 889         return ret;
 890 }
 891
 892 LTTNG_HIDDEN
 893 int mi_lttng_event_fields_open(struct mi_writer *writer)
 894 {
 895         return mi_lttng_writer_open_element(writer, mi_lttng_element_event_fields);
 896 }
 897
 898 LTTNG_HIDDEN
 899 int mi_lttng_event_field(struct mi_writer *writer,
 900                 struct lttng_event_field *field)
 901 {
 902         int ret;
 903
 904         if (!field->field_name[0]) {
 905                 /* To Review: not sure if legal david ?
 906                  * how should this be handle ?
 907                  */
 908                 ret = 0;
 909                 goto end;
 910         }
 911
 912         /* Open field */
 913         ret = mi_lttng_writer_open_element(writer, mi_lttng_element_event_field);
 914         if (ret) {
 915                 goto end;
 916         }
 917
 918         if (!field->field_name[0]) {
 919                 goto close;
 920         }
 921
 922         /* Name */
 923         ret = mi_lttng_writer_write_element_string(writer, config_element_name,
 924                         field->field_name);
 925         if (ret) {
 926                 goto end;
 927         }
 928
 929         /* Type */
 930         ret = mi_lttng_writer_write_element_string(writer, config_element_type,
 931                         mi_lttng_eventfieldtype_string(field->type));
 932         if (ret) {
 933                 goto end;
 934         }
 935
 936         /* nowrite  */
 937         ret = mi_lttng_writer_write_element_signed_int(writer,
 938                         mi_lttng_element_nowrite, field->nowrite);
 939         if (ret) {
 940                 goto end;
 941         }
 942
 943 close:
 944         /* Close field element */
 945         ret = mi_lttng_writer_close_element(writer);
 946
 947 end:
 948         return ret;
 949 }