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 #define _GNU_SOURCE
  20 #define _LGPL_SOURCE
  21 #include <include/config.h>
  22 #include <common/config/config.h>
  23 #include <lttng/snapshot-internal.h>
  24 #include "mi-lttng.h"
  25
  26 #include <assert.h>
  27
  28 /* Strings related to command */
  29 const char * const mi_lttng_element_command = "command";
  30 const char * const mi_lttng_element_command_action = "snapshot_action";
  31 const char * const mi_lttng_element_command_add_context = "add-context";
  32 const char * const mi_lttng_element_command_calibrate = "calibrate";
  33 const char * const mi_lttng_element_command_create = "create";
  34 const char * const mi_lttng_element_command_destroy = "destroy";
  35 const char * const mi_lttng_element_command_disable_channel = "disable-channel";
  36 const char * const mi_lttng_element_command_disable_event = "disable-event";
  37 const char * const mi_lttng_element_command_enable_channels = "enable-channel";
  38 const char * const mi_lttng_element_command_enable_event = "enable-event";
  39 const char * const mi_lttng_element_command_list = "list";
  40 const char * const mi_lttng_element_command_load = "load";
  41 const char * const mi_lttng_element_command_name = "name";
  42 const char * const mi_lttng_element_command_output = "output";
  43 const char * const mi_lttng_element_command_save = "save";
  44 const char * const mi_lttng_element_command_set_session = "set-session";
  45 const char * const mi_lttng_element_command_snapshot = "snapshot";
  46 const char * const mi_lttng_element_command_snapshot_add = "add_snapshot";
  47 const char * const mi_lttng_element_command_snapshot_del = "del_snapshot";
  48 const char * const mi_lttng_element_command_snapshot_list = "list_snapshot";
  49 const char * const mi_lttng_element_command_snapshot_record = "record_snapshot";
  50 const char * const mi_lttng_element_command_start = "start";
  51 const char * const mi_lttng_element_command_stop = "stop";
  52 const char * const mi_lttng_element_command_success = "success";
  53 const char * const mi_lttng_element_command_track = "track";
  54 const char * const mi_lttng_element_command_untrack = "untrack";
  55 const char * const mi_lttng_element_command_version = "version";
  56
  57 /* Strings related to version command */
  58 const char * const mi_lttng_element_version = "version";
  59 const char * const mi_lttng_element_version_commit = "commit";
  60 const char * const mi_lttng_element_version_description = "description";
  61 const char * const mi_lttng_element_version_license = "license";
  62 const char * const mi_lttng_element_version_major = "major";
  63 const char * const mi_lttng_element_version_minor = "minor";
  64 const char * const mi_lttng_element_version_patch_level = "patchLevel";
  65 const char * const mi_lttng_element_version_str = "string";
  66 const char * const mi_lttng_element_version_web = "url";
  67
  68 /* String related to a lttng_event_field */
  69 const char * const mi_lttng_element_event_field = "event_field";
  70 const char * const mi_lttng_element_event_fields = "event_fields";
  71
  72 /* String related to lttng_event_context */
  73 const char * const mi_lttng_context_type_perf_counter = "PERF_COUNTER";
  74 const char * const mi_lttng_context_type_perf_cpu_counter = "PERF_CPU_COUNTER";
  75 const char * const mi_lttng_context_type_perf_thread_counter = "PERF_THREAD_COUNTER";
  76
  77 /* String related to lttng_event_perf_counter_ctx */
  78 const char * const mi_lttng_element_perf_counter_context = "perf_counter_context";
  79
  80 /* Strings related to pid */
  81 const char * const mi_lttng_element_processes = "processes";
  82 const char * const mi_lttng_element_process = "process";
  83 const char * const mi_lttng_element_pid_id = "id";
  84
  85 /* Strings related to save command */
  86 const char * const mi_lttng_element_save = "save";
  87
  88 /* Strings related to load command */
  89 const char * const mi_lttng_element_load = "load";
  90
  91 /* General elements of mi_lttng */
  92 const char * const mi_lttng_element_empty = "";
  93 const char * const mi_lttng_element_id = "id";
  94 const char * const mi_lttng_element_nowrite = "nowrite";
  95 const char * const mi_lttng_element_success = "success";
  96 const char * const mi_lttng_element_type_enum = "ENUM";
  97 const char * const mi_lttng_element_type_float = "FLOAT";
  98 const char * const mi_lttng_element_type_integer = "INTEGER";
  99 const char * const mi_lttng_element_type_other = "OTHER";
 100 const char * const mi_lttng_element_type_string = "STRING";
 101
 102 /* String related to loglevel */
 103 const char * const mi_lttng_loglevel_str_alert = "TRACE_ALERT";
 104 const char * const mi_lttng_loglevel_str_crit = "TRACE_CRIT";
 105 const char * const mi_lttng_loglevel_str_debug = "TRACE_DEBUG";
 106 const char * const mi_lttng_loglevel_str_debug_function = "TRACE_DEBUG_FUNCTION";
 107 const char * const mi_lttng_loglevel_str_debug_line = "TRACE_DEBUG_LINE";
 108 const char * const mi_lttng_loglevel_str_debug_module = "TRACE_DEBUG_MODULE";
 109 const char * const mi_lttng_loglevel_str_debug_process = "TRACE_DEBUG_PROCESS";
 110 const char * const mi_lttng_loglevel_str_debug_program = "TRACE_DEBUG_PROGRAM";
 111 const char * const mi_lttng_loglevel_str_debug_system = "TRACE_DEBUG_SYSTEM";
 112 const char * const mi_lttng_loglevel_str_debug_unit = "TRACE_DEBUG_UNIT";
 113 const char * const mi_lttng_loglevel_str_emerg = "TRACE_EMERG";
 114 const char * const mi_lttng_loglevel_str_err = "TRACE_ERR";
 115 const char * const mi_lttng_loglevel_str_info = "TRACE_INFO";
 116 const char * const mi_lttng_loglevel_str_notice = "TRACE_NOTICE";
 117 const char * const mi_lttng_loglevel_str_unknown = "UNKNOWN";
 118 const char * const mi_lttng_loglevel_str_warning = "TRACE_WARNING";
 119
 120 /* String related to loglevel JUL */
 121 const char * const mi_lttng_loglevel_str_jul_all = "JUL_ALL";
 122 const char * const mi_lttng_loglevel_str_jul_config = "JUL_CONFIG";
 123 const char * const mi_lttng_loglevel_str_jul_fine = "JUL_FINE";
 124 const char * const mi_lttng_loglevel_str_jul_finer = "JUL_FINER";
 125 const char * const mi_lttng_loglevel_str_jul_finest = "JUL_FINEST";
 126 const char * const mi_lttng_loglevel_str_jul_info = "JUL_INFO";
 127 const char * const mi_lttng_loglevel_str_jul_off = "JUL_OFF";
 128 const char * const mi_lttng_loglevel_str_jul_severe = "JUL_SEVERE";
 129 const char * const mi_lttng_loglevel_str_jul_warning = "JUL_WARNING";
 130
 131 /* String related to loglevel LOG4J */
 132 const char * const mi_lttng_loglevel_str_log4j_off = "LOG4J_OFF";
 133 const char * const mi_lttng_loglevel_str_log4j_fatal = "LOG4J_FATAL";
 134 const char * const mi_lttng_loglevel_str_log4j_error = "LOG4J_ERROR";
 135 const char * const mi_lttng_loglevel_str_log4j_warn = "LOG4J_WARN";
 136 const char * const mi_lttng_loglevel_str_log4j_info = "LOG4J_INFO";
 137 const char * const mi_lttng_loglevel_str_log4j_debug = "LOG4J_DEBUG";
 138 const char * const mi_lttng_loglevel_str_log4j_trace = "LOG4J_TRACE";
 139 const char * const mi_lttng_loglevel_str_log4j_all = "LOG4J_ALL";
 140
 141 /* String related to loglevel Python */
 142 const char * const mi_lttng_loglevel_str_python_critical = "PYTHON_CRITICAL";
 143 const char * const mi_lttng_loglevel_str_python_error = "PYTHON_ERROR";
 144 const char * const mi_lttng_loglevel_str_python_warning = "PYTHON_WARNING";
 145 const char * const mi_lttng_loglevel_str_python_info = "PYTHON_INFO";
 146 const char * const mi_lttng_loglevel_str_python_debug = "PYTHON_DEBUG";
 147 const char * const mi_lttng_loglevel_str_python_notset = "PYTHON_NOTSET";
 148
 149 /* String related to loglevel type */
 150 const char * const mi_lttng_loglevel_type_all = "ALL";
 151 const char * const mi_lttng_loglevel_type_range = "RANGE";
 152 const char * const mi_lttng_loglevel_type_single = "SINGLE";
 153 const char * const mi_lttng_loglevel_type_unknown = "UNKNOWN";
 154
 155 /* String related to lttng_calibrate */
 156 const char * const mi_lttng_element_calibrate = "calibrate";
 157 const char * const mi_lttng_element_calibrate_function = "FUNCTION";
 158
 159 /* String related to a lttng_snapshot_output */
 160 const char * const mi_lttng_element_snapshot_ctrl_url = "ctrl_url";
 161 const char * const mi_lttng_element_snapshot_data_url = "data_url";
 162 const char * const mi_lttng_element_snapshot_max_size = "max_size";
 163 const char * const mi_lttng_element_snapshot_n_ptr = "n_ptr";
 164 const char * const mi_lttng_element_snapshot_session_name = "session_name";
 165 const char * const mi_lttng_element_snapshots = "snapshots";
 166
 167 /* String related to track/untrack command */
 168 const char * const mi_lttng_element_track_untrack_targets = "targets";
 169 const char * const mi_lttng_element_track_untrack_pid_target = "pid_target";
 170 const char * const mi_lttng_element_track_untrack_all_wildcard = "*";
 171
 172
 173 /* This is a merge of jul loglevel and regular loglevel
 174  * Those should never overlap by definition
 175  * (see struct lttng_event loglevel)
 176  */
 177 LTTNG_HIDDEN
 178 const char *mi_lttng_loglevel_string(int value, enum lttng_domain_type domain)
 179 {
 180         switch (domain) {
 181         case LTTNG_DOMAIN_KERNEL:
 182         case LTTNG_DOMAIN_UST:
 183                 switch (value) {
 184                 case -1:
 185                         return mi_lttng_element_empty;
 186                 case LTTNG_LOGLEVEL_EMERG:
 187                         return mi_lttng_loglevel_str_emerg;
 188                 case LTTNG_LOGLEVEL_ALERT:
 189                         return mi_lttng_loglevel_str_alert;
 190                 case LTTNG_LOGLEVEL_CRIT:
 191                         return mi_lttng_loglevel_str_crit;
 192                 case LTTNG_LOGLEVEL_ERR:
 193                         return mi_lttng_loglevel_str_err;
 194                 case LTTNG_LOGLEVEL_WARNING:
 195                         return mi_lttng_loglevel_str_warning;
 196                 case LTTNG_LOGLEVEL_NOTICE:
 197                         return mi_lttng_loglevel_str_notice;
 198                 case LTTNG_LOGLEVEL_INFO:
 199                         return mi_lttng_loglevel_str_info;
 200                 case LTTNG_LOGLEVEL_DEBUG_SYSTEM:
 201                         return mi_lttng_loglevel_str_debug_system;
 202                 case LTTNG_LOGLEVEL_DEBUG_PROGRAM:
 203                         return mi_lttng_loglevel_str_debug_program;
 204                 case LTTNG_LOGLEVEL_DEBUG_PROCESS:
 205                         return mi_lttng_loglevel_str_debug_process;
 206                 case LTTNG_LOGLEVEL_DEBUG_MODULE:
 207                         return mi_lttng_loglevel_str_debug_module;
 208                 case LTTNG_LOGLEVEL_DEBUG_UNIT:
 209                         return mi_lttng_loglevel_str_debug_unit;
 210                 case LTTNG_LOGLEVEL_DEBUG_FUNCTION:
 211                         return mi_lttng_loglevel_str_debug_function;
 212                 case LTTNG_LOGLEVEL_DEBUG_LINE:
 213                         return mi_lttng_loglevel_str_debug_line;
 214                 case LTTNG_LOGLEVEL_DEBUG:
 215                         return mi_lttng_loglevel_str_debug;
 216                 default:
 217                         return mi_lttng_loglevel_str_unknown;
 218                 }
 219                 break;
 220         case LTTNG_DOMAIN_LOG4J:
 221                 switch (value) {
 222                 case -1:
 223                         return mi_lttng_element_empty;
 224                 case LTTNG_LOGLEVEL_LOG4J_OFF:
 225                         return mi_lttng_loglevel_str_log4j_off;
 226                 case LTTNG_LOGLEVEL_LOG4J_FATAL:
 227                         return mi_lttng_loglevel_str_log4j_fatal;
 228                 case LTTNG_LOGLEVEL_LOG4J_ERROR:
 229                         return mi_lttng_loglevel_str_log4j_error;
 230                 case LTTNG_LOGLEVEL_LOG4J_WARN:
 231                         return mi_lttng_loglevel_str_log4j_warn;
 232                 case LTTNG_LOGLEVEL_LOG4J_INFO:
 233                         return mi_lttng_loglevel_str_log4j_info;
 234                 case LTTNG_LOGLEVEL_LOG4J_DEBUG:
 235                         return mi_lttng_loglevel_str_log4j_debug;
 236                 case LTTNG_LOGLEVEL_LOG4J_TRACE:
 237                         return mi_lttng_loglevel_str_log4j_trace;
 238                 case LTTNG_LOGLEVEL_LOG4J_ALL:
 239                         return mi_lttng_loglevel_str_log4j_all;
 240                 default:
 241                         return mi_lttng_loglevel_str_unknown;
 242                 }
 243                 break;
 244         case LTTNG_DOMAIN_JUL:
 245                 switch (value) {
 246                 case -1:
 247                         return mi_lttng_element_empty;
 248                 case LTTNG_LOGLEVEL_JUL_OFF:
 249                         return mi_lttng_loglevel_str_jul_off;
 250                 case LTTNG_LOGLEVEL_JUL_SEVERE:
 251                         return mi_lttng_loglevel_str_jul_severe;
 252                 case LTTNG_LOGLEVEL_JUL_WARNING:
 253                         return mi_lttng_loglevel_str_jul_warning;
 254                 case LTTNG_LOGLEVEL_JUL_INFO:
 255                         return mi_lttng_loglevel_str_jul_info;
 256                 case LTTNG_LOGLEVEL_JUL_CONFIG:
 257                         return mi_lttng_loglevel_str_jul_config;
 258                 case LTTNG_LOGLEVEL_JUL_FINE:
 259                         return mi_lttng_loglevel_str_jul_fine;
 260                 case LTTNG_LOGLEVEL_JUL_FINER:
 261                         return mi_lttng_loglevel_str_jul_finer;
 262                 case LTTNG_LOGLEVEL_JUL_FINEST:
 263                         return mi_lttng_loglevel_str_jul_finest;
 264                 case LTTNG_LOGLEVEL_JUL_ALL:
 265                         return mi_lttng_loglevel_str_jul_all;
 266                 default:
 267                         return mi_lttng_loglevel_str_unknown;
 268                 }
 269                 break;
 270         case LTTNG_DOMAIN_PYTHON:
 271                 switch (value) {
 272                 case LTTNG_LOGLEVEL_PYTHON_CRITICAL:
 273                         return mi_lttng_loglevel_str_python_critical;
 274                 case LTTNG_LOGLEVEL_PYTHON_ERROR:
 275                         return mi_lttng_loglevel_str_python_error;
 276                 case LTTNG_LOGLEVEL_PYTHON_WARNING:
 277                         return mi_lttng_loglevel_str_python_warning;
 278                 case LTTNG_LOGLEVEL_PYTHON_INFO:
 279                         return mi_lttng_loglevel_str_python_info;
 280                 case LTTNG_LOGLEVEL_PYTHON_DEBUG:
 281                         return mi_lttng_loglevel_str_python_debug;
 282                 case LTTNG_LOGLEVEL_PYTHON_NOTSET:
 283                         return mi_lttng_loglevel_str_python_notset;
 284                 default:
 285                         return mi_lttng_loglevel_str_unknown;
 286                 }
 287                 break;
 288         }
 289
 290         /* Reaching this means the domain is unknown. */
 291         return mi_lttng_loglevel_str_unknown;
 292 }
 293
 294 LTTNG_HIDDEN
 295 const char *mi_lttng_logleveltype_string(enum lttng_loglevel_type value)
 296 {
 297         switch (value) {
 298         case LTTNG_EVENT_LOGLEVEL_ALL:
 299                 return mi_lttng_loglevel_type_all;
 300         case LTTNG_EVENT_LOGLEVEL_RANGE:
 301                 return mi_lttng_loglevel_type_range;
 302         case LTTNG_EVENT_LOGLEVEL_SINGLE:
 303                 return mi_lttng_loglevel_type_single;
 304         default:
 305                 return mi_lttng_loglevel_type_unknown;
 306         }
 307 }
 308
 309 LTTNG_HIDDEN
 310 const char *mi_lttng_eventtype_string(enum lttng_event_type value)
 311 {
 312         switch (value) {
 313         case LTTNG_EVENT_ALL:
 314                 return config_event_type_all;
 315         case LTTNG_EVENT_TRACEPOINT:
 316                 return config_event_type_tracepoint;
 317         case LTTNG_EVENT_PROBE:
 318                 return config_event_type_probe;
 319         case LTTNG_EVENT_FUNCTION:
 320                 return config_event_type_function;
 321         case LTTNG_EVENT_FUNCTION_ENTRY:
 322                 return config_event_type_function_entry;
 323         case LTTNG_EVENT_SYSCALL:
 324                 return config_event_type_syscall;
 325         case LTTNG_EVENT_NOOP:
 326                 return config_event_type_noop;
 327         default:
 328                 return mi_lttng_element_empty;
 329         }
 330 }
 331
 332 LTTNG_HIDDEN
 333 const char *mi_lttng_event_contexttype_string(enum lttng_event_context_type val)
 334 {
 335         switch (val) {
 336         case LTTNG_EVENT_CONTEXT_PID:
 337                 return config_event_context_pid;
 338         case LTTNG_EVENT_CONTEXT_PERF_COUNTER:
 339                 return mi_lttng_context_type_perf_counter;
 340         case LTTNG_EVENT_CONTEXT_PERF_THREAD_COUNTER:
 341                 return mi_lttng_context_type_perf_thread_counter;
 342         case LTTNG_EVENT_CONTEXT_PERF_CPU_COUNTER:
 343                 return mi_lttng_context_type_perf_cpu_counter;
 344         case LTTNG_EVENT_CONTEXT_PROCNAME:
 345                 return config_event_context_procname;
 346         case LTTNG_EVENT_CONTEXT_PRIO:
 347                 return config_event_context_prio;
 348         case LTTNG_EVENT_CONTEXT_NICE:
 349                 return config_event_context_nice;
 350         case LTTNG_EVENT_CONTEXT_VPID:
 351                 return config_event_context_vpid;
 352         case LTTNG_EVENT_CONTEXT_TID:
 353                 return config_event_context_tid;
 354         case LTTNG_EVENT_CONTEXT_VTID:
 355                 return config_event_context_vtid;
 356         case LTTNG_EVENT_CONTEXT_PPID:
 357                 return config_event_context_ppid;
 358         case LTTNG_EVENT_CONTEXT_VPPID:
 359                 return config_event_context_vppid;
 360         case LTTNG_EVENT_CONTEXT_PTHREAD_ID:
 361                 return config_event_context_pthread_id;
 362         case LTTNG_EVENT_CONTEXT_HOSTNAME:
 363                 return config_event_context_hostname;
 364         case LTTNG_EVENT_CONTEXT_IP:
 365                 return config_event_context_ip;
 366         default:
 367                 return NULL;
 368         }
 369 }
 370
 371 LTTNG_HIDDEN
 372 const char *mi_lttng_eventfieldtype_string(enum lttng_event_field_type val)
 373 {
 374         switch (val) {
 375         case(LTTNG_EVENT_FIELD_INTEGER):
 376                 return mi_lttng_element_type_integer;
 377         case(LTTNG_EVENT_FIELD_ENUM):
 378                 return mi_lttng_element_type_enum;
 379         case(LTTNG_EVENT_FIELD_FLOAT):
 380                 return mi_lttng_element_type_float;
 381         case(LTTNG_EVENT_FIELD_STRING):
 382                 return mi_lttng_element_type_string;
 383         default:
 384                 return mi_lttng_element_type_other;
 385         }
 386 }
 387
 388 LTTNG_HIDDEN
 389 const char *mi_lttng_domaintype_string(enum lttng_domain_type value)
 390 {
 391         /* Note: This is a *duplicate* of get_domain_str from bin/lttng/utils.c */
 392         switch (value) {
 393         case LTTNG_DOMAIN_KERNEL:
 394                 return config_domain_type_kernel;
 395         case LTTNG_DOMAIN_UST:
 396                 return config_domain_type_ust;
 397         case LTTNG_DOMAIN_JUL:
 398                 return config_domain_type_jul;
 399         case LTTNG_DOMAIN_LOG4J:
 400                 return config_domain_type_log4j;
 401         case LTTNG_DOMAIN_PYTHON:
 402                 return config_domain_type_python;
 403         default:
 404                 /* Should not have an unknown domain */
 405                 assert(0);
 406         }
 407 }
 408
 409 LTTNG_HIDDEN
 410 const char *mi_lttng_buffertype_string(enum lttng_buffer_type value)
 411 {
 412         switch (value) {
 413         case LTTNG_BUFFER_PER_PID:
 414                 return config_buffer_type_per_pid;
 415         case LTTNG_BUFFER_PER_UID:
 416                 return config_buffer_type_per_uid;
 417         case LTTNG_BUFFER_GLOBAL:
 418                 return config_buffer_type_global;
 419         default:
 420                 /* Should not have an unknow buffer type */
 421                 assert(0);
 422         }
 423 }
 424
 425 LTTNG_HIDDEN
 426 const char *mi_lttng_calibratetype_string(enum lttng_calibrate_type val)
 427 {
 428         const char *ret;
 429
 430         switch (val) {
 431         case LTTNG_CALIBRATE_FUNCTION:
 432                 ret = mi_lttng_element_calibrate_function;
 433                 break;
 434         default:
 435                 ret = mi_lttng_element_empty;
 436                 break;
 437         }
 438         return ret;
 439 }
 440
 441 LTTNG_HIDDEN
 442 struct mi_writer *mi_lttng_writer_create(int fd_output, int mi_output_type)
 443 {
 444         struct mi_writer *mi_writer;
 445
 446         mi_writer = zmalloc(sizeof(struct mi_writer));
 447         if (!mi_writer) {
 448                 PERROR("zmalloc mi_writer_create");
 449                 goto end;
 450         }
 451         if (mi_output_type == LTTNG_MI_XML) {
 452                 mi_writer->writer = config_writer_create(fd_output, 0);
 453                 if (!mi_writer->writer) {
 454                         goto err_destroy;
 455                 }
 456                 mi_writer->type = LTTNG_MI_XML;
 457         } else {
 458                 goto err_destroy;
 459         }
 460
 461 end:
 462         return mi_writer;
 463
 464 err_destroy:
 465         free(mi_writer);
 466         return NULL;
 467 }
 468
 469 LTTNG_HIDDEN
 470 int mi_lttng_writer_destroy(struct mi_writer *writer)
 471 {
 472         int ret;
 473
 474         if (!writer) {
 475                 ret = -EINVAL;
 476                 goto end;
 477         }
 478
 479         ret = config_writer_destroy(writer->writer);
 480         if (ret < 0) {
 481                 goto end;
 482         }
 483
 484         free(writer);
 485 end:
 486         return ret;
 487 }
 488
 489 LTTNG_HIDDEN
 490 int mi_lttng_writer_command_open(struct mi_writer *writer, const char *command)
 491 {
 492         int ret;
 493
 494         ret = mi_lttng_writer_open_element(writer, mi_lttng_element_command);
 495         if (ret) {
 496                 goto end;
 497         }
 498         ret = mi_lttng_writer_write_element_string(writer,
 499                         mi_lttng_element_command_name, command);
 500 end:
 501         return ret;
 502 }
 503
 504 LTTNG_HIDDEN
 505 int mi_lttng_writer_command_close(struct mi_writer *writer)
 506 {
 507         return mi_lttng_writer_close_element(writer);
 508 }
 509
 510 LTTNG_HIDDEN
 511 int mi_lttng_writer_open_element(struct mi_writer *writer,
 512                 const char *element_name)
 513 {
 514         return config_writer_open_element(writer->writer, element_name);
 515 }
 516
 517 LTTNG_HIDDEN
 518 int mi_lttng_writer_close_element(struct mi_writer *writer)
 519 {
 520         return config_writer_close_element(writer->writer);
 521 }
 522
 523 LTTNG_HIDDEN
 524 int mi_lttng_close_multi_element(struct mi_writer *writer,
 525                 unsigned int nb_element)
 526 {
 527         int ret, i;
 528
 529         if (nb_element < 1) {
 530                 ret = 0;
 531                 goto end;
 532         }
 533         for (i = 0; i < nb_element; i++) {
 534                 ret = mi_lttng_writer_close_element(writer);
 535                 if (ret) {
 536                         goto end;
 537                 }
 538         }
 539 end:
 540         return ret;
 541 }
 542
 543 LTTNG_HIDDEN
 544 int mi_lttng_writer_write_element_unsigned_int(struct mi_writer *writer,
 545                 const char *element_name, uint64_t value)
 546 {
 547         return config_writer_write_element_unsigned_int(writer->writer,
 548                         element_name, value);
 549 }
 550
 551 LTTNG_HIDDEN
 552 int mi_lttng_writer_write_element_signed_int(struct mi_writer *writer,
 553                 const char *element_name, int64_t value)
 554 {
 555         return config_writer_write_element_signed_int(writer->writer,
 556                         element_name, value);
 557 }
 558
 559 LTTNG_HIDDEN
 560 int mi_lttng_writer_write_element_bool(struct mi_writer *writer,
 561                 const char *element_name, int value)
 562 {
 563         return config_writer_write_element_bool(writer->writer,
 564                         element_name, value);
 565 }
 566
 567 LTTNG_HIDDEN
 568 int mi_lttng_writer_write_element_string(struct mi_writer *writer,
 569                 const char *element_name, const char *value)
 570 {
 571         return config_writer_write_element_string(writer->writer,
 572                         element_name, value);
 573 }
 574
 575 LTTNG_HIDDEN
 576 int mi_lttng_version(struct mi_writer *writer, struct mi_lttng_version *version,
 577         const char *lttng_description, const char *lttng_license)
 578 {
 579         int ret;
 580
 581         /* Open version */
 582         ret = mi_lttng_writer_open_element(writer, mi_lttng_element_version);
 583         if (ret) {
 584                 goto end;
 585         }
 586
 587         /* Version string (contain info like rc etc.) */
 588         ret = mi_lttng_writer_write_element_string(writer,
 589                         mi_lttng_element_version_str, version->version);
 590         if (ret) {
 591                 goto end;
 592         }
 593
 594         /* Major version number */
 595         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 596                         mi_lttng_element_version_major, version->version_major);
 597         if (ret) {
 598                 goto end;
 599         }
 600
 601         /* Minor version number */
 602         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 603                         mi_lttng_element_version_minor, version->version_minor);
 604         if (ret) {
 605                 goto end;
 606         }
 607
 608         /* Commit version number */
 609         ret = mi_lttng_writer_write_element_string(writer,
 610                         mi_lttng_element_version_commit, version->version_commit);
 611         if (ret) {
 612                 goto end;
 613         }
 614
 615         /* Patch number */
 616         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 617                         mi_lttng_element_version_patch_level, version->version_patchlevel);
 618         if (ret) {
 619                 goto end;
 620         }
 621
 622         /* Name of the version */
 623         ret = mi_lttng_writer_write_element_string(writer,
 624                         config_element_name, version->version_name);
 625         if (ret) {
 626                 goto end;
 627         }
 628
 629         /* Description mostly related to beer... */
 630         ret = mi_lttng_writer_write_element_string(writer,
 631                         mi_lttng_element_version_description, lttng_description);
 632         if (ret) {
 633                 goto end;
 634         }
 635
 636         /* url */
 637         ret = mi_lttng_writer_write_element_string(writer,
 638                         mi_lttng_element_version_web, version->package_url);
 639         if (ret) {
 640                 goto end;
 641         }
 642
 643         /* License: free as in free beer...no...*speech* */
 644         ret = mi_lttng_writer_write_element_string(writer,
 645                         mi_lttng_element_version_license, lttng_license);
 646         if (ret) {
 647                 goto end;
 648         }
 649
 650         /* Close version element */
 651         ret = mi_lttng_writer_close_element(writer);
 652
 653 end:
 654         return ret;
 655 }
 656
 657 LTTNG_HIDDEN
 658 int mi_lttng_sessions_open(struct mi_writer *writer)
 659 {
 660         return mi_lttng_writer_open_element(writer, config_element_sessions);
 661 }
 662
 663 LTTNG_HIDDEN
 664 int mi_lttng_session(struct mi_writer *writer,
 665                 struct lttng_session *session, int is_open)
 666 {
 667         int ret;
 668
 669         assert(session);
 670
 671         /* Open sessions element */
 672         ret = mi_lttng_writer_open_element(writer,
 673                         config_element_session);
 674         if (ret) {
 675                 goto end;
 676         }
 677
 678         /* Name of the session */
 679         ret = mi_lttng_writer_write_element_string(writer,
 680                         config_element_name, session->name);
 681         if (ret) {
 682                 goto end;
 683         }
 684
 685         /* Path */
 686         ret = mi_lttng_writer_write_element_string(writer,
 687                         config_element_path, session->path);
 688         if (ret) {
 689                 goto end;
 690         }
 691
 692         /* Enabled ? */
 693         ret = mi_lttng_writer_write_element_bool(writer,
 694                         config_element_enabled, session->enabled);
 695         if (ret) {
 696                 goto end;
 697         }
 698
 699         /* Snapshot mode */
 700         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 701                         config_element_snapshot_mode, session->snapshot_mode);
 702         if (ret) {
 703                 goto end;
 704         }
 705
 706         /* Live timer interval in usec */
 707         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 708                         config_element_live_timer_interval,
 709                         session->live_timer_interval);
 710         if (ret) {
 711                 goto end;
 712         }
 713
 714         if (!is_open) {
 715                 /* Closing session element */
 716                 ret = mi_lttng_writer_close_element(writer);
 717         }
 718 end:
 719         return ret;
 720
 721 }
 722
 723 LTTNG_HIDDEN
 724 int mi_lttng_domains_open(struct mi_writer *writer)
 725 {
 726         return mi_lttng_writer_open_element(writer, config_element_domains);
 727 }
 728
 729 LTTNG_HIDDEN
 730 int mi_lttng_domain(struct mi_writer *writer,
 731                 struct lttng_domain *domain, int is_open)
 732 {
 733         int ret = 0;
 734         const char *str_domain;
 735         const char *str_buffer;
 736
 737         assert(domain);
 738
 739         /* Open domain element */
 740         ret = mi_lttng_writer_open_element(writer, config_element_domain);
 741         if (ret) {
 742                 goto end;
 743         }
 744
 745         /* Domain Type */
 746         str_domain = mi_lttng_domaintype_string(domain->type);
 747         ret = mi_lttng_writer_write_element_string(writer, config_element_type,
 748                         str_domain);
 749         if (ret) {
 750                 goto end;
 751         }
 752
 753         /* Buffer Type */
 754         str_buffer= mi_lttng_buffertype_string(domain->buf_type);
 755         ret = mi_lttng_writer_write_element_string(writer,
 756                         config_element_buffer_type, str_buffer);
 757         if (ret) {
 758                 goto end;
 759         }
 760
 761         /* TODO: union  attr
 762          * This union is not currently used and was added for
 763          * future ust domain support.
 764          * Date: 25-06-2014
 765          * */
 766
 767         if (!is_open) {
 768                 /* Closing domain element */
 769                 ret = mi_lttng_writer_close_element(writer);
 770         }
 771
 772 end:
 773         return ret;
 774
 775 }
 776
 777 LTTNG_HIDDEN
 778 int mi_lttng_channels_open(struct mi_writer *writer)
 779 {
 780         return mi_lttng_writer_open_element(writer, config_element_channels);
 781 }
 782
 783 LTTNG_HIDDEN
 784 int mi_lttng_channel(struct mi_writer *writer,
 785                 struct lttng_channel *channel, int is_open)
 786 {
 787         int ret = 0;
 788
 789         assert(channel);
 790
 791         /* Opening channel element */
 792         ret = mi_lttng_writer_open_element(writer, config_element_channel);
 793         if (ret) {
 794                 goto end;
 795         }
 796
 797         /* Name */
 798         ret = mi_lttng_writer_write_element_string(writer, config_element_name,
 799                         channel->name);
 800         if (ret) {
 801                 goto end;
 802         }
 803
 804         /* Enabled ? */
 805         ret = mi_lttng_writer_write_element_bool(writer,
 806                         config_element_enabled, channel->enabled);
 807         if (ret) {
 808                 goto end;
 809         }
 810
 811         /* Attribute */
 812         ret = mi_lttng_channel_attr(writer, &channel->attr);
 813         if (ret) {
 814                 goto end;
 815         }
 816
 817         if (!is_open) {
 818                 /* Closing channel element */
 819                 ret = mi_lttng_writer_close_element(writer);
 820                 if (ret) {
 821                         goto end;
 822                 }
 823         }
 824 end:
 825         return ret;
 826 }
 827
 828 LTTNG_HIDDEN
 829 int mi_lttng_channel_attr(struct mi_writer *writer,
 830                 struct lttng_channel_attr *attr)
 831 {
 832         int ret = 0;
 833
 834         assert(attr);
 835
 836         /* Opening Attributes */
 837         ret = mi_lttng_writer_open_element(writer, config_element_attributes);
 838         if (ret) {
 839                 goto end;
 840         }
 841
 842         /* Overwrite */
 843         ret = mi_lttng_writer_write_element_string(writer,
 844                 config_element_overwrite_mode,
 845                 attr->overwrite ? config_overwrite_mode_overwrite :
 846                         config_overwrite_mode_discard);
 847         if (ret) {
 848                 goto end;
 849         }
 850
 851         /* Sub buffer size in byte */
 852         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 853                 config_element_subbuf_size, attr->subbuf_size);
 854         if (ret) {
 855                 goto end;
 856         }
 857
 858         /* Number of subbuffer (power of two) */
 859         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 860                 config_element_num_subbuf,
 861                 attr->num_subbuf);
 862         if (ret) {
 863                 goto end;
 864         }
 865
 866         /* Switch timer interval in usec */
 867         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 868                 config_element_switch_timer_interval,
 869                 attr->switch_timer_interval);
 870         if (ret) {
 871                 goto end;
 872         }
 873
 874         /* Read timer interval in usec */
 875         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 876                 config_element_read_timer_interval,
 877                 attr->read_timer_interval);
 878         if (ret) {
 879                 goto end;
 880         }
 881
 882         /* Event output */
 883         ret = mi_lttng_writer_write_element_string(writer,
 884                 config_element_output_type,
 885                 attr->output == LTTNG_EVENT_SPLICE ?
 886                 config_output_type_splice : config_output_type_mmap);
 887         if (ret) {
 888                 goto end;
 889         }
 890
 891         /* Tracefile size in bytes */
 892         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 893                 config_element_tracefile_size, attr->tracefile_size);
 894         if (ret) {
 895                 goto end;
 896         }
 897
 898         /* Count of tracefiles */
 899         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 900                 config_element_tracefile_count,
 901                 attr->tracefile_count);
 902         if (ret) {
 903                 goto end;
 904         }
 905
 906         /* Live timer interval in usec*/
 907         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 908                 config_element_live_timer_interval,
 909                 attr->live_timer_interval);
 910         if (ret) {
 911                 goto end;
 912         }
 913
 914         /* Closing attributes */
 915         ret = mi_lttng_writer_close_element(writer);
 916         if (ret) {
 917                 goto end;
 918         }
 919 end:
 920         return ret;
 921
 922 }
 923
 924 LTTNG_HIDDEN
 925 int mi_lttng_event_common_attributes(struct mi_writer *writer,
 926                 struct lttng_event *event)
 927 {
 928         int ret;
 929
 930         /* Open event element */
 931         ret = mi_lttng_writer_open_element(writer, config_element_event);
 932         if (ret) {
 933                 goto end;
 934         }
 935
 936         /* Event name */
 937         ret = mi_lttng_writer_write_element_string(writer,
 938                         config_element_name, event->name);
 939         if (ret) {
 940                 goto end;
 941         }
 942
 943         /* Event type */
 944         ret = mi_lttng_writer_write_element_string(writer,
 945                         config_element_type, mi_lttng_eventtype_string(event->type));
 946         if (ret) {
 947                 goto end;
 948         }
 949
 950         /* Is event enabled */
 951         ret = mi_lttng_writer_write_element_bool(writer,
 952                         config_element_enabled, event->enabled);
 953         if (ret) {
 954                 goto end;
 955         }
 956
 957         /* Event filter enabled? */
 958         ret = mi_lttng_writer_write_element_bool(writer,
 959                         config_element_filter, event->filter);
 960
 961 end:
 962         return ret;
 963 }
 964
 965 LTTNG_HIDDEN
 966 int mi_lttng_event_tracepoint_loglevel(struct mi_writer *writer,
 967                 struct lttng_event *event, enum lttng_domain_type domain)
 968 {
 969         int ret;
 970
 971         /* Event loglevel */
 972         ret = mi_lttng_writer_write_element_string(writer,
 973                         config_element_loglevel,
 974                         mi_lttng_loglevel_string(event->loglevel, domain));
 975         if (ret) {
 976                 goto end;
 977         }
 978
 979         /* Log level type */
 980         ret = mi_lttng_writer_write_element_string(writer,
 981                         config_element_loglevel_type,
 982                         mi_lttng_logleveltype_string(event->loglevel_type));
 983         if (ret) {
 984                 goto end;
 985         }
 986
 987         /* event exclusion filter */
 988         ret = mi_lttng_writer_write_element_bool(writer,
 989                         config_element_exclusion, event->exclusion);
 990         if (ret) {
 991                 goto end;
 992         }
 993
 994 end:
 995         return ret;
 996 }
 997
 998 LTTNG_HIDDEN
 999 int mi_lttng_event_tracepoint_no_loglevel(struct mi_writer *writer,
1000                 struct lttng_event *event)
1001 {
1002         /* event exclusion filter */
1003         return mi_lttng_writer_write_element_bool(writer,
1004                         config_element_exclusion, event->exclusion);
1005 }
1006
1007 LTTNG_HIDDEN
1008 int mi_lttng_event_function_probe(struct mi_writer *writer,
1009                 struct lttng_event *event)
1010 {
1011         int ret;
1012
1013         ret = mi_lttng_writer_open_element(writer, config_element_attributes);
1014         if (ret) {
1015                 goto end;
1016         }
1017
1018         ret = mi_lttng_writer_open_element(writer, config_element_probe_attributes);
1019         if (ret) {
1020                 goto end;
1021         }
1022
1023         if (event->attr.probe.addr != 0) {
1024                 /* event probe address */
1025                 ret = mi_lttng_writer_write_element_unsigned_int(writer,
1026                                 config_element_address, event->attr.probe.addr);
1027                 if (ret) {
1028                         goto end;
1029                 }
1030         } else {
1031                 /* event probe offset */
1032                 ret = mi_lttng_writer_write_element_unsigned_int(writer,
1033                                 config_element_offset, event->attr.probe.offset);
1034                 if (ret) {
1035                         goto end;
1036                 }
1037
1038                 /* event probe symbol_name */
1039                 ret = mi_lttng_writer_write_element_string(writer,
1040                                 config_element_symbol_name, event->attr.probe.symbol_name);
1041                 if (ret) {
1042                         goto end;
1043                 }
1044         }
1045
1046         /* Close probe_attributes and attributes */
1047         ret = mi_lttng_close_multi_element(writer, 2);
1048 end:
1049         return ret;
1050 }
1051
1052 LTTNG_HIDDEN
1053 int mi_lttng_event_function_entry(struct mi_writer *writer,
1054                 struct lttng_event *event)
1055 {
1056         int ret;
1057
1058         ret = mi_lttng_writer_open_element(writer, config_element_attributes);
1059         if (ret) {
1060                 goto end;
1061         }
1062
1063         ret = mi_lttng_writer_open_element(writer, config_element_probe_attributes);
1064         if (ret) {
1065                 goto end;
1066         }
1067
1068         /* event probe symbol_name */
1069         ret = mi_lttng_writer_write_element_string(writer,
1070                         config_element_symbol_name, event->attr.ftrace.symbol_name);
1071         if (ret) {
1072                 goto end;
1073         }
1074
1075         /* Close function_attributes and attributes */
1076         ret = mi_lttng_close_multi_element(writer, 2);
1077 end:
1078         return ret;
1079 }
1080
1081 LTTNG_HIDDEN
1082 int mi_lttng_events_open(struct mi_writer *writer)
1083 {
1084         return mi_lttng_writer_open_element(writer, config_element_events);
1085 }
1086
1087 LTTNG_HIDDEN
1088 int mi_lttng_event(struct mi_writer *writer,
1089                 struct lttng_event *event, int is_open, enum lttng_domain_type domain)
1090 {
1091         int ret;
1092
1093         ret = mi_lttng_event_common_attributes(writer, event);
1094         if (ret) {
1095                 goto end;
1096         }
1097
1098         switch (event->type) {
1099         case LTTNG_EVENT_TRACEPOINT:
1100         {
1101                 if (event->loglevel != -1) {
1102                         ret = mi_lttng_event_tracepoint_loglevel(writer, event, domain);
1103                 } else {
1104                         ret = mi_lttng_event_tracepoint_no_loglevel(writer, event);
1105                 }
1106                 break;
1107         }
1108         case LTTNG_EVENT_FUNCTION:
1109                 /* Fallthrough */
1110         case LTTNG_EVENT_PROBE:
1111                 ret = mi_lttng_event_function_probe(writer, event);
1112                 break;
1113         case LTTNG_EVENT_FUNCTION_ENTRY:
1114                 ret = mi_lttng_event_function_entry(writer, event);
1115                 break;
1116         case LTTNG_EVENT_ALL:
1117                 /* Fallthrough */
1118         default:
1119                 break;
1120         }
1121
1122         if (!is_open) {
1123                 ret = mi_lttng_writer_close_element(writer);
1124         }
1125
1126 end:
1127         return ret;
1128 }
1129
1130 LTTNG_HIDDEN
1131 int mi_lttng_trackers_open(struct mi_writer *writer)
1132 {
1133         return mi_lttng_writer_open_element(writer, config_element_trackers);
1134 }
1135
1136 LTTNG_HIDDEN
1137 int mi_lttng_pid_tracker_open(struct mi_writer *writer)
1138 {
1139         int ret;
1140
1141         /* Open element pid_tracker */
1142         ret = mi_lttng_writer_open_element(writer, config_element_pid_tracker);
1143         if (ret) {
1144                 goto end;
1145         }
1146
1147         /* Open targets element */
1148         ret = mi_lttng_targets_open(writer);
1149 end:
1150         return ret;
1151 }
1152
1153 LTTNG_HIDDEN
1154 int mi_lttng_pids_open(struct mi_writer *writer)
1155 {
1156         return mi_lttng_writer_open_element(writer, config_element_pids);
1157 }
1158
1159 LTTNG_HIDDEN
1160 int mi_lttng_processes_open(struct mi_writer *writer)
1161 {
1162         return mi_lttng_writer_open_element(writer, mi_lttng_element_processes);
1163 }
1164
1165 LTTNG_HIDDEN
1166 int mi_lttng_process(struct mi_writer *writer, pid_t pid , const char *name,
1167                 int is_open)
1168 {
1169         int ret;
1170
1171         /* Open element process */
1172         ret = mi_lttng_writer_open_element(writer, mi_lttng_element_process);
1173         if (ret) {
1174                 goto end;
1175         }
1176
1177         /* Writing pid number */
1178         ret = mi_lttng_writer_write_element_signed_int(writer,
1179                         config_element_pid, (int)pid);
1180         if (ret) {
1181                 goto end;
1182         }
1183
1184         /* Writing name of the process */
1185         if (name) {
1186                 ret = mi_lttng_writer_write_element_string(writer, config_element_name,
1187                                 name);
1188                 if (ret) {
1189                         goto end;
1190                 }
1191         }
1192
1193         if (!is_open) {
1194                 /* Closing Pid */
1195                 ret = mi_lttng_writer_close_element(writer);
1196         }
1197
1198 end:
1199         return ret;
1200 }
1201
1202 LTTNG_HIDDEN
1203 int mi_lttng_targets_open(struct mi_writer *writer)
1204 {
1205         return mi_lttng_writer_open_element(writer,
1206                         mi_lttng_element_track_untrack_targets);
1207 }
1208
1209 LTTNG_HIDDEN
1210 int mi_lttng_pid_target(struct mi_writer *writer, pid_t pid, int is_open)
1211 {
1212         int ret;
1213
1214         ret = mi_lttng_writer_open_element(writer,
1215                         mi_lttng_element_track_untrack_pid_target);
1216         if (ret) {
1217                 goto end;
1218         }
1219
1220         /* Writing pid number
1221          * Special case for element all on track untrack command
1222          * All pid is represented as wildcard *
1223          */
1224         if ((int) pid == -1) {
1225                 ret = mi_lttng_writer_write_element_string(writer,
1226                                 config_element_pid,
1227                                 mi_lttng_element_track_untrack_all_wildcard);
1228         } else {
1229                 ret = mi_lttng_writer_write_element_signed_int(writer,
1230                                 config_element_pid, (int) pid);
1231         }
1232         if (ret) {
1233                 goto end;
1234         }
1235
1236         if (!is_open) {
1237                 ret = mi_lttng_writer_close_element(writer);
1238                 if (ret) {
1239                         goto end;
1240                 }
1241         }
1242
1243 end:
1244         return ret;
1245 }
1246
1247 LTTNG_HIDDEN
1248 int mi_lttng_event_fields_open(struct mi_writer *writer)
1249 {
1250         return mi_lttng_writer_open_element(writer, mi_lttng_element_event_fields);
1251 }
1252
1253 LTTNG_HIDDEN
1254 int mi_lttng_event_field(struct mi_writer *writer,
1255                 struct lttng_event_field *field)
1256 {
1257         int ret;
1258
1259         if (!field->field_name[0]) {
1260                 ret = 0;
1261                 goto end;
1262         }
1263
1264         /* Open field */
1265         ret = mi_lttng_writer_open_element(writer, mi_lttng_element_event_field);
1266         if (ret) {
1267                 goto end;
1268         }
1269
1270         if (!field->field_name[0]) {
1271                 goto close;
1272         }
1273
1274         /* Name */
1275         ret = mi_lttng_writer_write_element_string(writer, config_element_name,
1276                         field->field_name);
1277         if (ret) {
1278                 goto end;
1279         }
1280
1281         /* Type */
1282         ret = mi_lttng_writer_write_element_string(writer, config_element_type,
1283                         mi_lttng_eventfieldtype_string(field->type));
1284         if (ret) {
1285                 goto end;
1286         }
1287
1288         /* nowrite  */
1289         ret = mi_lttng_writer_write_element_signed_int(writer,
1290                         mi_lttng_element_nowrite, field->nowrite);
1291         if (ret) {
1292                 goto end;
1293         }
1294
1295 close:
1296         /* Close field element */
1297         ret = mi_lttng_writer_close_element(writer);
1298
1299 end:
1300         return ret;
1301 }
1302
1303 LTTNG_HIDDEN
1304 int mi_lttng_calibrate(struct mi_writer *writer,
1305                 struct lttng_calibrate *calibrate)
1306 {
1307         int ret;
1308
1309         /* Open calibrate element */
1310         ret = mi_lttng_writer_open_element(writer, mi_lttng_element_calibrate);
1311         if (ret) {
1312                 goto end;
1313         }
1314
1315         /* Calibration type */
1316         ret = mi_lttng_writer_write_element_string(writer, config_element_type,
1317                         mi_lttng_calibratetype_string(calibrate->type));
1318         if (ret) {
1319                 goto end;
1320         }
1321
1322         /* Closing calibrate element */
1323         ret = mi_lttng_writer_close_element(writer);
1324 end:
1325         return ret;
1326 }
1327
1328 LTTNG_HIDDEN
1329 int mi_lttng_context(struct mi_writer *writer,
1330                 struct lttng_event_context *context, int is_open)
1331 {
1332         int ret;
1333         const char *type_string;
1334         struct lttng_event_perf_counter_ctx *perf_context;
1335         /* Open context */
1336         ret = mi_lttng_writer_open_element(writer , config_element_context);
1337         if (ret) {
1338                 goto end;
1339         }
1340
1341         type_string = mi_lttng_event_contexttype_string(context->ctx);
1342         if (!type_string) {
1343                 ret = -LTTNG_ERR_INVALID;
1344                 goto end;
1345         }
1346
1347         /* Print context type */
1348         ret = mi_lttng_writer_write_element_string(writer, config_element_type,
1349                         type_string);
1350
1351         /* Special case for PERF_*_COUNTER
1352          * print the lttng_event_perf_counter_ctx*/
1353         switch (context->ctx) {
1354         case LTTNG_EVENT_CONTEXT_PERF_COUNTER:
1355         case LTTNG_EVENT_CONTEXT_PERF_THREAD_COUNTER:
1356         case LTTNG_EVENT_CONTEXT_PERF_CPU_COUNTER:
1357                 perf_context = &context->u.perf_counter;
1358                 ret =  mi_lttng_perf_counter_context(writer, perf_context);
1359                 if (ret) {
1360                         goto end;
1361                 }
1362                 break;
1363         default:
1364                 break;
1365         }
1366
1367         /* Close context */
1368         if (!is_open) {
1369                 ret = mi_lttng_writer_close_element(writer);
1370         }
1371
1372 end:
1373         return ret;
1374 }
1375
1376 LTTNG_HIDDEN
1377 int mi_lttng_perf_counter_context(struct mi_writer *writer,
1378                 struct lttng_event_perf_counter_ctx  *perf_context)
1379 {
1380         int ret;
1381
1382         /* Open perf_counter_context */
1383         ret = mi_lttng_writer_open_element(writer,
1384                         mi_lttng_element_perf_counter_context);
1385         if (ret) {
1386                 goto end;
1387         }
1388
1389         /* Type */
1390         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1391                         config_element_type, perf_context->type);
1392         if (ret) {
1393                 goto end;
1394         }
1395
1396         /* Config */
1397         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1398                         config_element_config, perf_context->config);
1399         if (ret) {
1400                 goto end;
1401         }
1402
1403         /* Name of the perf counter */
1404         ret = mi_lttng_writer_write_element_string(writer,
1405                         config_element_name, perf_context->name);
1406         if (ret) {
1407                 goto end;
1408         }
1409
1410         /* Close perf_counter_context */
1411         ret = mi_lttng_writer_close_element(writer);
1412 end:
1413         return ret;
1414 }
1415
1416 LTTNG_HIDDEN
1417 int mi_lttng_snapshot_output_session_name(struct mi_writer *writer,
1418                 const char *session_name)
1419 {
1420         int ret;
1421
1422         /* Open session element */
1423         ret = mi_lttng_writer_open_element(writer, config_element_session);
1424         if (ret) {
1425                 goto end;
1426         }
1427
1428         /* Snapshot output list for current session name */
1429         ret = mi_lttng_writer_write_element_string(writer, config_element_name,
1430                         session_name);
1431         if (ret) {
1432                 goto end;
1433         }
1434
1435         /* Open element snapshots (sequence one snapshot) */
1436         ret = mi_lttng_writer_open_element(writer, mi_lttng_element_snapshots);
1437         if (ret) {
1438                 goto end;
1439         }
1440
1441 end:
1442         return ret;
1443 }
1444
1445 LTTNG_HIDDEN
1446 int mi_lttng_snapshot_list_output(struct mi_writer *writer,
1447                 struct lttng_snapshot_output *output)
1448 {
1449         int ret;
1450
1451         /* Open element snapshot output */
1452         ret = mi_lttng_writer_open_element(writer,
1453                         mi_lttng_element_command_snapshot);
1454         if (ret) {
1455                 goto end;
1456         }
1457
1458         /* ID of the snapshot output */
1459         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1460                         mi_lttng_element_id, output->id);
1461         if (ret) {
1462                 goto end;
1463         }
1464
1465         /* Name of the output */
1466         ret = mi_lttng_writer_write_element_string(writer, config_element_name,
1467                         output->name);
1468         if (ret) {
1469                 goto end;
1470         }
1471
1472         /* Destination of the output (ctrl_url)*/
1473         ret = mi_lttng_writer_write_element_string(writer,
1474                         mi_lttng_element_snapshot_ctrl_url, output->ctrl_url);
1475         if (ret) {
1476                 goto end;
1477         }
1478
1479         /* Destination of the output (data_url) */
1480         ret = mi_lttng_writer_write_element_string(writer,
1481                         mi_lttng_element_snapshot_data_url, output->data_url);
1482         if (ret) {
1483                 goto end;
1484         }
1485
1486         /* total size of all stream combined */
1487         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1488                         mi_lttng_element_snapshot_max_size, output->max_size);
1489         if (ret) {
1490                 goto end;
1491         }
1492
1493         /* Close snapshot output element */
1494         ret = mi_lttng_writer_close_element(writer);
1495
1496 end:
1497         return ret;
1498 }
1499
1500 LTTNG_HIDDEN
1501 int mi_lttng_snapshot_del_output(struct mi_writer *writer, int id,
1502                 const char *name, const char *current_session_name)
1503 {
1504         int ret;
1505
1506         /* Open element del_snapshot */
1507         ret = mi_lttng_writer_open_element(writer,
1508                         mi_lttng_element_command_snapshot);
1509         if (ret) {
1510                 goto end;
1511         }
1512
1513
1514         if (id != UINT32_MAX) {
1515                 /* "Snapshot output "id" successfully deleted
1516                  * for "current_session_name"
1517                  * ID of the snapshot output
1518                  */
1519                 ret = mi_lttng_writer_write_element_unsigned_int(writer,
1520                                 mi_lttng_element_id, id);
1521                 if (ret) {
1522                         goto end;
1523                 }
1524         } else {
1525                 /* "Snapshot output "name" successfully deleted
1526                  * for session "current_session_name"
1527                  * Name of the output
1528                  */
1529                 ret = mi_lttng_writer_write_element_string(writer, config_element_name,
1530                                 name);
1531                 if (ret) {
1532                         goto end;
1533                 }
1534         }
1535
1536         /* Snapshot was deleted for session "current_session_name"*/
1537         ret = mi_lttng_writer_write_element_string(writer,
1538                         mi_lttng_element_snapshot_session_name,
1539                         current_session_name);
1540         if (ret) {
1541                 goto end;
1542         }
1543
1544         /* Close snapshot element */
1545         ret = mi_lttng_writer_close_element(writer);
1546
1547 end:
1548         return ret;
1549 }
1550
1551 LTTNG_HIDDEN
1552 int mi_lttng_snapshot_add_output(struct mi_writer *writer,
1553                 const char *current_session_name, const char *n_ptr,
1554                 struct lttng_snapshot_output *output)
1555 {
1556         int ret;
1557
1558         /* Open element snapshot */
1559         ret = mi_lttng_writer_open_element(writer,
1560                         mi_lttng_element_command_snapshot);
1561         if (ret) {
1562                 goto end;
1563         }
1564
1565         /* Snapshot output id */
1566         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1567                         mi_lttng_element_id, output->id);
1568         if (ret) {
1569                 goto end;
1570         }
1571
1572         /* Snapshot output names */
1573         ret = mi_lttng_writer_write_element_string(writer,
1574                         config_element_name, n_ptr);
1575         if (ret) {
1576                 goto end;
1577         }
1578
1579         /* Destination of the output (ctrl_url)*/
1580         ret = mi_lttng_writer_write_element_string(writer,
1581                         mi_lttng_element_snapshot_ctrl_url, output->ctrl_url);
1582         if (ret) {
1583                 goto end;
1584         }
1585
1586         /* Snapshot added for session "current_session_name"*/
1587         ret = mi_lttng_writer_write_element_string(writer,
1588                         mi_lttng_element_snapshot_session_name, current_session_name);
1589         if (ret) {
1590                 goto end;
1591         }
1592
1593         /* total size of all stream combined */
1594         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1595                         mi_lttng_element_snapshot_max_size, output->max_size);
1596         if (ret) {
1597                 goto end;
1598         }
1599
1600         /* Close snapshot element */
1601         ret = mi_lttng_writer_close_element(writer);
1602
1603 end:
1604         return ret;
1605 }
1606
1607 LTTNG_HIDDEN
1608 int mi_lttng_snapshot_record(struct mi_writer *writer,
1609                 const char *current_session_name, const char *url,
1610                 const char *cmdline_ctrl_url, const char *cmdline_data_url)
1611 {
1612         int ret;
1613
1614         /* Open element snapshot */
1615         ret = mi_lttng_writer_open_element(writer,
1616                         mi_lttng_element_command_snapshot);
1617         if (ret) {
1618                 goto end;
1619         }
1620
1621         /*
1622          * If a valid an URL was given, serialize it,
1623          * else take the command line data and ctrl urls*/
1624         if (url) {
1625                 /* Destination of the output (ctrl_url)*/
1626                 ret = mi_lttng_writer_write_element_string(writer,
1627                                 mi_lttng_element_snapshot_ctrl_url, url);
1628                 if (ret) {
1629                         goto end;
1630                 }
1631         } else if (cmdline_ctrl_url) {
1632                 /* Destination of the output (ctrl_url)*/
1633                 ret = mi_lttng_writer_write_element_string(writer,
1634                                 mi_lttng_element_snapshot_ctrl_url, cmdline_ctrl_url);
1635                 if (ret) {
1636                         goto end;
1637                 }
1638
1639                 /* Destination of the output (data_url) */
1640                 ret = mi_lttng_writer_write_element_string(writer,
1641                                 mi_lttng_element_snapshot_data_url, cmdline_data_url);
1642                 if (ret) {
1643                         goto end;
1644                 }
1645         }
1646
1647         /* Close record_snapshot element */
1648         ret = mi_lttng_writer_close_element(writer);
1649
1650 end:
1651         return ret;
1652 }