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