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 _LGPL_SOURCE
  20 #include <common/config/session-config.h>
  21 #include <lttng/snapshot-internal.h>
  22 #include "mi-lttng.h"
  23
  24 #include <assert.h>
  25
  26 /* Strings related to command */
  27 const char * const mi_lttng_element_command = "command";
  28 const char * const mi_lttng_element_command_action = "snapshot_action";
  29 const char * const mi_lttng_element_command_add_context = "add-context";
  30 const char * const mi_lttng_element_command_calibrate = "calibrate";
  31 const char * const mi_lttng_element_command_create = "create";
  32 const char * const mi_lttng_element_command_destroy = "destroy";
  33 const char * const mi_lttng_element_command_disable_channel = "disable-channel";
  34 const char * const mi_lttng_element_command_disable_event = "disable-event";
  35 const char * const mi_lttng_element_command_enable_channels = "enable-channel";
  36 const char * const mi_lttng_element_command_enable_event = "enable-event";
  37 const char * const mi_lttng_element_command_list = "list";
  38 const char * const mi_lttng_element_command_load = "load";
  39 const char * const mi_lttng_element_command_name = "name";
  40 const char * const mi_lttng_element_command_output = "output";
  41 const char * const mi_lttng_element_command_save = "save";
  42 const char * const mi_lttng_element_command_set_session = "set-session";
  43 const char * const mi_lttng_element_command_snapshot = "snapshot";
  44 const char * const mi_lttng_element_command_snapshot_add = "add_snapshot";
  45 const char * const mi_lttng_element_command_snapshot_del = "del_snapshot";
  46 const char * const mi_lttng_element_command_snapshot_list = "list_snapshot";
  47 const char * const mi_lttng_element_command_snapshot_record = "record_snapshot";
  48 const char * const mi_lttng_element_command_start = "start";
  49 const char * const mi_lttng_element_command_stop = "stop";
  50 const char * const mi_lttng_element_command_success = "success";
  51 const char * const mi_lttng_element_command_track = "track";
  52 const char * const mi_lttng_element_command_untrack = "untrack";
  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_pid_id = "id";
  80
  81 /* Strings related to save command */
  82 const char * const mi_lttng_element_save = "save";
  83
  84 /* Strings related to load command */
  85 const char * const mi_lttng_element_load = "load";
  86
  87 /* General elements of mi_lttng */
  88 const char * const mi_lttng_element_empty = "";
  89 const char * const mi_lttng_element_id = "id";
  90 const char * const mi_lttng_element_nowrite = "nowrite";
  91 const char * const mi_lttng_element_success = "success";
  92 const char * const mi_lttng_element_type_enum = "ENUM";
  93 const char * const mi_lttng_element_type_float = "FLOAT";
  94 const char * const mi_lttng_element_type_integer = "INTEGER";
  95 const char * const mi_lttng_element_type_other = "OTHER";
  96 const char * const mi_lttng_element_type_string = "STRING";
  97
  98 /* String related to loglevel */
  99 const char * const mi_lttng_loglevel_str_alert = "TRACE_ALERT";
 100 const char * const mi_lttng_loglevel_str_crit = "TRACE_CRIT";
 101 const char * const mi_lttng_loglevel_str_debug = "TRACE_DEBUG";
 102 const char * const mi_lttng_loglevel_str_debug_function = "TRACE_DEBUG_FUNCTION";
 103 const char * const mi_lttng_loglevel_str_debug_line = "TRACE_DEBUG_LINE";
 104 const char * const mi_lttng_loglevel_str_debug_module = "TRACE_DEBUG_MODULE";
 105 const char * const mi_lttng_loglevel_str_debug_process = "TRACE_DEBUG_PROCESS";
 106 const char * const mi_lttng_loglevel_str_debug_program = "TRACE_DEBUG_PROGRAM";
 107 const char * const mi_lttng_loglevel_str_debug_system = "TRACE_DEBUG_SYSTEM";
 108 const char * const mi_lttng_loglevel_str_debug_unit = "TRACE_DEBUG_UNIT";
 109 const char * const mi_lttng_loglevel_str_emerg = "TRACE_EMERG";
 110 const char * const mi_lttng_loglevel_str_err = "TRACE_ERR";
 111 const char * const mi_lttng_loglevel_str_info = "TRACE_INFO";
 112 const char * const mi_lttng_loglevel_str_notice = "TRACE_NOTICE";
 113 const char * const mi_lttng_loglevel_str_unknown = "UNKNOWN";
 114 const char * const mi_lttng_loglevel_str_warning = "TRACE_WARNING";
 115
 116 /* String related to loglevel JUL */
 117 const char * const mi_lttng_loglevel_str_jul_all = "JUL_ALL";
 118 const char * const mi_lttng_loglevel_str_jul_config = "JUL_CONFIG";
 119 const char * const mi_lttng_loglevel_str_jul_fine = "JUL_FINE";
 120 const char * const mi_lttng_loglevel_str_jul_finer = "JUL_FINER";
 121 const char * const mi_lttng_loglevel_str_jul_finest = "JUL_FINEST";
 122 const char * const mi_lttng_loglevel_str_jul_info = "JUL_INFO";
 123 const char * const mi_lttng_loglevel_str_jul_off = "JUL_OFF";
 124 const char * const mi_lttng_loglevel_str_jul_severe = "JUL_SEVERE";
 125 const char * const mi_lttng_loglevel_str_jul_warning = "JUL_WARNING";
 126
 127 /* String related to loglevel LOG4J */
 128 const char * const mi_lttng_loglevel_str_log4j_off = "LOG4J_OFF";
 129 const char * const mi_lttng_loglevel_str_log4j_fatal = "LOG4J_FATAL";
 130 const char * const mi_lttng_loglevel_str_log4j_error = "LOG4J_ERROR";
 131 const char * const mi_lttng_loglevel_str_log4j_warn = "LOG4J_WARN";
 132 const char * const mi_lttng_loglevel_str_log4j_info = "LOG4J_INFO";
 133 const char * const mi_lttng_loglevel_str_log4j_debug = "LOG4J_DEBUG";
 134 const char * const mi_lttng_loglevel_str_log4j_trace = "LOG4J_TRACE";
 135 const char * const mi_lttng_loglevel_str_log4j_all = "LOG4J_ALL";
 136
 137 /* String related to loglevel Python */
 138 const char * const mi_lttng_loglevel_str_python_critical = "PYTHON_CRITICAL";
 139 const char * const mi_lttng_loglevel_str_python_error = "PYTHON_ERROR";
 140 const char * const mi_lttng_loglevel_str_python_warning = "PYTHON_WARNING";
 141 const char * const mi_lttng_loglevel_str_python_info = "PYTHON_INFO";
 142 const char * const mi_lttng_loglevel_str_python_debug = "PYTHON_DEBUG";
 143 const char * const mi_lttng_loglevel_str_python_notset = "PYTHON_NOTSET";
 144
 145 /* String related to loglevel type */
 146 const char * const mi_lttng_loglevel_type_all = "ALL";
 147 const char * const mi_lttng_loglevel_type_range = "RANGE";
 148 const char * const mi_lttng_loglevel_type_single = "SINGLE";
 149 const char * const mi_lttng_loglevel_type_unknown = "UNKNOWN";
 150
 151 /* String related to lttng_calibrate */
 152 const char * const mi_lttng_element_calibrate = "calibrate";
 153 const char * const mi_lttng_element_calibrate_function = "FUNCTION";
 154
 155 /* String related to a lttng_snapshot_output */
 156 const char * const mi_lttng_element_snapshot_ctrl_url = "ctrl_url";
 157 const char * const mi_lttng_element_snapshot_data_url = "data_url";
 158 const char * const mi_lttng_element_snapshot_max_size = "max_size";
 159 const char * const mi_lttng_element_snapshot_n_ptr = "n_ptr";
 160 const char * const mi_lttng_element_snapshot_session_name = "session_name";
 161 const char * const mi_lttng_element_snapshots = "snapshots";
 162
 163 /* String related to track/untrack command */
 164 const char * const mi_lttng_element_track_untrack_all_wildcard = "*";
 165
 166
 167 /* This is a merge of jul loglevel and regular loglevel
 168  * Those should never overlap by definition
 169  * (see struct lttng_event loglevel)
 170  */
 171 LTTNG_HIDDEN
 172 const char *mi_lttng_loglevel_string(int value, enum lttng_domain_type domain)
 173 {
 174         switch (domain) {
 175         case LTTNG_DOMAIN_KERNEL:
 176         case LTTNG_DOMAIN_UST:
 177                 switch (value) {
 178                 case -1:
 179                         return mi_lttng_element_empty;
 180                 case LTTNG_LOGLEVEL_EMERG:
 181                         return mi_lttng_loglevel_str_emerg;
 182                 case LTTNG_LOGLEVEL_ALERT:
 183                         return mi_lttng_loglevel_str_alert;
 184                 case LTTNG_LOGLEVEL_CRIT:
 185                         return mi_lttng_loglevel_str_crit;
 186                 case LTTNG_LOGLEVEL_ERR:
 187                         return mi_lttng_loglevel_str_err;
 188                 case LTTNG_LOGLEVEL_WARNING:
 189                         return mi_lttng_loglevel_str_warning;
 190                 case LTTNG_LOGLEVEL_NOTICE:
 191                         return mi_lttng_loglevel_str_notice;
 192                 case LTTNG_LOGLEVEL_INFO:
 193                         return mi_lttng_loglevel_str_info;
 194                 case LTTNG_LOGLEVEL_DEBUG_SYSTEM:
 195                         return mi_lttng_loglevel_str_debug_system;
 196                 case LTTNG_LOGLEVEL_DEBUG_PROGRAM:
 197                         return mi_lttng_loglevel_str_debug_program;
 198                 case LTTNG_LOGLEVEL_DEBUG_PROCESS:
 199                         return mi_lttng_loglevel_str_debug_process;
 200                 case LTTNG_LOGLEVEL_DEBUG_MODULE:
 201                         return mi_lttng_loglevel_str_debug_module;
 202                 case LTTNG_LOGLEVEL_DEBUG_UNIT:
 203                         return mi_lttng_loglevel_str_debug_unit;
 204                 case LTTNG_LOGLEVEL_DEBUG_FUNCTION:
 205                         return mi_lttng_loglevel_str_debug_function;
 206                 case LTTNG_LOGLEVEL_DEBUG_LINE:
 207                         return mi_lttng_loglevel_str_debug_line;
 208                 case LTTNG_LOGLEVEL_DEBUG:
 209                         return mi_lttng_loglevel_str_debug;
 210                 default:
 211                         return mi_lttng_loglevel_str_unknown;
 212                 }
 213                 break;
 214         case LTTNG_DOMAIN_LOG4J:
 215                 switch (value) {
 216                 case -1:
 217                         return mi_lttng_element_empty;
 218                 case LTTNG_LOGLEVEL_LOG4J_OFF:
 219                         return mi_lttng_loglevel_str_log4j_off;
 220                 case LTTNG_LOGLEVEL_LOG4J_FATAL:
 221                         return mi_lttng_loglevel_str_log4j_fatal;
 222                 case LTTNG_LOGLEVEL_LOG4J_ERROR:
 223                         return mi_lttng_loglevel_str_log4j_error;
 224                 case LTTNG_LOGLEVEL_LOG4J_WARN:
 225                         return mi_lttng_loglevel_str_log4j_warn;
 226                 case LTTNG_LOGLEVEL_LOG4J_INFO:
 227                         return mi_lttng_loglevel_str_log4j_info;
 228                 case LTTNG_LOGLEVEL_LOG4J_DEBUG:
 229                         return mi_lttng_loglevel_str_log4j_debug;
 230                 case LTTNG_LOGLEVEL_LOG4J_TRACE:
 231                         return mi_lttng_loglevel_str_log4j_trace;
 232                 case LTTNG_LOGLEVEL_LOG4J_ALL:
 233                         return mi_lttng_loglevel_str_log4j_all;
 234                 default:
 235                         return mi_lttng_loglevel_str_unknown;
 236                 }
 237                 break;
 238         case LTTNG_DOMAIN_JUL:
 239                 switch (value) {
 240                 case -1:
 241                         return mi_lttng_element_empty;
 242                 case LTTNG_LOGLEVEL_JUL_OFF:
 243                         return mi_lttng_loglevel_str_jul_off;
 244                 case LTTNG_LOGLEVEL_JUL_SEVERE:
 245                         return mi_lttng_loglevel_str_jul_severe;
 246                 case LTTNG_LOGLEVEL_JUL_WARNING:
 247                         return mi_lttng_loglevel_str_jul_warning;
 248                 case LTTNG_LOGLEVEL_JUL_INFO:
 249                         return mi_lttng_loglevel_str_jul_info;
 250                 case LTTNG_LOGLEVEL_JUL_CONFIG:
 251                         return mi_lttng_loglevel_str_jul_config;
 252                 case LTTNG_LOGLEVEL_JUL_FINE:
 253                         return mi_lttng_loglevel_str_jul_fine;
 254                 case LTTNG_LOGLEVEL_JUL_FINER:
 255                         return mi_lttng_loglevel_str_jul_finer;
 256                 case LTTNG_LOGLEVEL_JUL_FINEST:
 257                         return mi_lttng_loglevel_str_jul_finest;
 258                 case LTTNG_LOGLEVEL_JUL_ALL:
 259                         return mi_lttng_loglevel_str_jul_all;
 260                 default:
 261                         return mi_lttng_loglevel_str_unknown;
 262                 }
 263                 break;
 264         case LTTNG_DOMAIN_PYTHON:
 265                 switch (value) {
 266                 case LTTNG_LOGLEVEL_PYTHON_CRITICAL:
 267                         return mi_lttng_loglevel_str_python_critical;
 268                 case LTTNG_LOGLEVEL_PYTHON_ERROR:
 269                         return mi_lttng_loglevel_str_python_error;
 270                 case LTTNG_LOGLEVEL_PYTHON_WARNING:
 271                         return mi_lttng_loglevel_str_python_warning;
 272                 case LTTNG_LOGLEVEL_PYTHON_INFO:
 273                         return mi_lttng_loglevel_str_python_info;
 274                 case LTTNG_LOGLEVEL_PYTHON_DEBUG:
 275                         return mi_lttng_loglevel_str_python_debug;
 276                 case LTTNG_LOGLEVEL_PYTHON_NOTSET:
 277                         return mi_lttng_loglevel_str_python_notset;
 278                 default:
 279                         return mi_lttng_loglevel_str_unknown;
 280                 }
 281                 break;
 282         }
 283
 284         /* Reaching this means the domain is unknown. */
 285         return mi_lttng_loglevel_str_unknown;
 286 }
 287
 288 LTTNG_HIDDEN
 289 const char *mi_lttng_logleveltype_string(enum lttng_loglevel_type value)
 290 {
 291         switch (value) {
 292         case LTTNG_EVENT_LOGLEVEL_ALL:
 293                 return mi_lttng_loglevel_type_all;
 294         case LTTNG_EVENT_LOGLEVEL_RANGE:
 295                 return mi_lttng_loglevel_type_range;
 296         case LTTNG_EVENT_LOGLEVEL_SINGLE:
 297                 return mi_lttng_loglevel_type_single;
 298         default:
 299                 return mi_lttng_loglevel_type_unknown;
 300         }
 301 }
 302
 303 LTTNG_HIDDEN
 304 const char *mi_lttng_eventtype_string(enum lttng_event_type value)
 305 {
 306         switch (value) {
 307         case LTTNG_EVENT_ALL:
 308                 return config_event_type_all;
 309         case LTTNG_EVENT_TRACEPOINT:
 310                 return config_event_type_tracepoint;
 311         case LTTNG_EVENT_PROBE:
 312                 return config_event_type_probe;
 313         case LTTNG_EVENT_FUNCTION:
 314                 return config_event_type_function;
 315         case LTTNG_EVENT_FUNCTION_ENTRY:
 316                 return config_event_type_function_entry;
 317         case LTTNG_EVENT_SYSCALL:
 318                 return config_event_type_syscall;
 319         case LTTNG_EVENT_NOOP:
 320                 return config_event_type_noop;
 321         default:
 322                 return mi_lttng_element_empty;
 323         }
 324 }
 325
 326 LTTNG_HIDDEN
 327 const char *mi_lttng_event_contexttype_string(enum lttng_event_context_type val)
 328 {
 329         switch (val) {
 330         case LTTNG_EVENT_CONTEXT_PID:
 331                 return config_event_context_pid;
 332         case LTTNG_EVENT_CONTEXT_PERF_COUNTER:
 333                 return mi_lttng_context_type_perf_counter;
 334         case LTTNG_EVENT_CONTEXT_PERF_THREAD_COUNTER:
 335                 return mi_lttng_context_type_perf_thread_counter;
 336         case LTTNG_EVENT_CONTEXT_PERF_CPU_COUNTER:
 337                 return mi_lttng_context_type_perf_cpu_counter;
 338         case LTTNG_EVENT_CONTEXT_PROCNAME:
 339                 return config_event_context_procname;
 340         case LTTNG_EVENT_CONTEXT_PRIO:
 341                 return config_event_context_prio;
 342         case LTTNG_EVENT_CONTEXT_NICE:
 343                 return config_event_context_nice;
 344         case LTTNG_EVENT_CONTEXT_VPID:
 345                 return config_event_context_vpid;
 346         case LTTNG_EVENT_CONTEXT_TID:
 347                 return config_event_context_tid;
 348         case LTTNG_EVENT_CONTEXT_VTID:
 349                 return config_event_context_vtid;
 350         case LTTNG_EVENT_CONTEXT_PPID:
 351                 return config_event_context_ppid;
 352         case LTTNG_EVENT_CONTEXT_VPPID:
 353                 return config_event_context_vppid;
 354         case LTTNG_EVENT_CONTEXT_PTHREAD_ID:
 355                 return config_event_context_pthread_id;
 356         case LTTNG_EVENT_CONTEXT_HOSTNAME:
 357                 return config_event_context_hostname;
 358         case LTTNG_EVENT_CONTEXT_IP:
 359                 return config_event_context_ip;
 360         default:
 361                 return NULL;
 362         }
 363 }
 364
 365 LTTNG_HIDDEN
 366 const char *mi_lttng_eventfieldtype_string(enum lttng_event_field_type val)
 367 {
 368         switch (val) {
 369         case(LTTNG_EVENT_FIELD_INTEGER):
 370                 return mi_lttng_element_type_integer;
 371         case(LTTNG_EVENT_FIELD_ENUM):
 372                 return mi_lttng_element_type_enum;
 373         case(LTTNG_EVENT_FIELD_FLOAT):
 374                 return mi_lttng_element_type_float;
 375         case(LTTNG_EVENT_FIELD_STRING):
 376                 return mi_lttng_element_type_string;
 377         default:
 378                 return mi_lttng_element_type_other;
 379         }
 380 }
 381
 382 LTTNG_HIDDEN
 383 const char *mi_lttng_domaintype_string(enum lttng_domain_type value)
 384 {
 385         /* Note: This is a *duplicate* of get_domain_str from bin/lttng/utils.c */
 386         switch (value) {
 387         case LTTNG_DOMAIN_KERNEL:
 388                 return config_domain_type_kernel;
 389         case LTTNG_DOMAIN_UST:
 390                 return config_domain_type_ust;
 391         case LTTNG_DOMAIN_JUL:
 392                 return config_domain_type_jul;
 393         case LTTNG_DOMAIN_LOG4J:
 394                 return config_domain_type_log4j;
 395         case LTTNG_DOMAIN_PYTHON:
 396                 return config_domain_type_python;
 397         default:
 398                 /* Should not have an unknown domain */
 399                 assert(0);
 400                 return NULL;
 401         }
 402 }
 403
 404 LTTNG_HIDDEN
 405 const char *mi_lttng_buffertype_string(enum lttng_buffer_type value)
 406 {
 407         switch (value) {
 408         case LTTNG_BUFFER_PER_PID:
 409                 return config_buffer_type_per_pid;
 410         case LTTNG_BUFFER_PER_UID:
 411                 return config_buffer_type_per_uid;
 412         case LTTNG_BUFFER_GLOBAL:
 413                 return config_buffer_type_global;
 414         default:
 415                 /* Should not have an unknow buffer type */
 416                 assert(0);
 417                 return NULL;
 418         }
 419 }
 420
 421 LTTNG_HIDDEN
 422 const char *mi_lttng_calibratetype_string(enum lttng_calibrate_type val)
 423 {
 424         const char *ret;
 425
 426         switch (val) {
 427         case LTTNG_CALIBRATE_FUNCTION:
 428                 ret = mi_lttng_element_calibrate_function;
 429                 break;
 430         default:
 431                 ret = mi_lttng_element_empty;
 432                 break;
 433         }
 434         return ret;
 435 }
 436
 437 LTTNG_HIDDEN
 438 struct mi_writer *mi_lttng_writer_create(int fd_output, int mi_output_type)
 439 {
 440         struct mi_writer *mi_writer;
 441
 442         mi_writer = zmalloc(sizeof(struct mi_writer));
 443         if (!mi_writer) {
 444                 PERROR("zmalloc mi_writer_create");
 445                 goto end;
 446         }
 447         if (mi_output_type == LTTNG_MI_XML) {
 448                 mi_writer->writer = config_writer_create(fd_output, 0);
 449                 if (!mi_writer->writer) {
 450                         goto err_destroy;
 451                 }
 452                 mi_writer->type = LTTNG_MI_XML;
 453         } else {
 454                 goto err_destroy;
 455         }
 456
 457 end:
 458         return mi_writer;
 459
 460 err_destroy:
 461         free(mi_writer);
 462         return NULL;
 463 }
 464
 465 LTTNG_HIDDEN
 466 int mi_lttng_writer_destroy(struct mi_writer *writer)
 467 {
 468         int ret;
 469
 470         if (!writer) {
 471                 ret = -EINVAL;
 472                 goto end;
 473         }
 474
 475         ret = config_writer_destroy(writer->writer);
 476         if (ret < 0) {
 477                 goto end;
 478         }
 479
 480         free(writer);
 481 end:
 482         return ret;
 483 }
 484
 485 LTTNG_HIDDEN
 486 int mi_lttng_writer_command_open(struct mi_writer *writer, const char *command)
 487 {
 488         int ret;
 489
 490         ret = mi_lttng_writer_open_element(writer, mi_lttng_element_command);
 491         if (ret) {
 492                 goto end;
 493         }
 494         ret = mi_lttng_writer_write_element_string(writer,
 495                         mi_lttng_element_command_name, command);
 496 end:
 497         return ret;
 498 }
 499
 500 LTTNG_HIDDEN
 501 int mi_lttng_writer_command_close(struct mi_writer *writer)
 502 {
 503         return mi_lttng_writer_close_element(writer);
 504 }
 505
 506 LTTNG_HIDDEN
 507 int mi_lttng_writer_open_element(struct mi_writer *writer,
 508                 const char *element_name)
 509 {
 510         return config_writer_open_element(writer->writer, element_name);
 511 }
 512
 513 LTTNG_HIDDEN
 514 int mi_lttng_writer_close_element(struct mi_writer *writer)
 515 {
 516         return config_writer_close_element(writer->writer);
 517 }
 518
 519 LTTNG_HIDDEN
 520 int mi_lttng_close_multi_element(struct mi_writer *writer,
 521                 unsigned int nb_element)
 522 {
 523         int ret, i;
 524
 525         if (nb_element < 1) {
 526                 ret = 0;
 527                 goto end;
 528         }
 529         for (i = 0; i < nb_element; i++) {
 530                 ret = mi_lttng_writer_close_element(writer);
 531                 if (ret) {
 532                         goto end;
 533                 }
 534         }
 535 end:
 536         return ret;
 537 }
 538
 539 LTTNG_HIDDEN
 540 int mi_lttng_writer_write_element_unsigned_int(struct mi_writer *writer,
 541                 const char *element_name, uint64_t value)
 542 {
 543         return config_writer_write_element_unsigned_int(writer->writer,
 544                         element_name, value);
 545 }
 546
 547 LTTNG_HIDDEN
 548 int mi_lttng_writer_write_element_signed_int(struct mi_writer *writer,
 549                 const char *element_name, int64_t value)
 550 {
 551         return config_writer_write_element_signed_int(writer->writer,
 552                         element_name, value);
 553 }
 554
 555 LTTNG_HIDDEN
 556 int mi_lttng_writer_write_element_bool(struct mi_writer *writer,
 557                 const char *element_name, int value)
 558 {
 559         return config_writer_write_element_bool(writer->writer,
 560                         element_name, value);
 561 }
 562
 563 LTTNG_HIDDEN
 564 int mi_lttng_writer_write_element_string(struct mi_writer *writer,
 565                 const char *element_name, const char *value)
 566 {
 567         return config_writer_write_element_string(writer->writer,
 568                         element_name, value);
 569 }
 570
 571 LTTNG_HIDDEN
 572 int mi_lttng_version(struct mi_writer *writer, struct mi_lttng_version *version,
 573         const char *lttng_description, const char *lttng_license)
 574 {
 575         int ret;
 576
 577         /* Open version */
 578         ret = mi_lttng_writer_open_element(writer, mi_lttng_element_version);
 579         if (ret) {
 580                 goto end;
 581         }
 582
 583         /* Version string (contain info like rc etc.) */
 584         ret = mi_lttng_writer_write_element_string(writer,
 585                         mi_lttng_element_version_str, version->version);
 586         if (ret) {
 587                 goto end;
 588         }
 589
 590         /* Major version number */
 591         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 592                         mi_lttng_element_version_major, version->version_major);
 593         if (ret) {
 594                 goto end;
 595         }
 596
 597         /* Minor version number */
 598         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 599                         mi_lttng_element_version_minor, version->version_minor);
 600         if (ret) {
 601                 goto end;
 602         }
 603
 604         /* Commit version number */
 605         ret = mi_lttng_writer_write_element_string(writer,
 606                         mi_lttng_element_version_commit, version->version_commit);
 607         if (ret) {
 608                 goto end;
 609         }
 610
 611         /* Patch number */
 612         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 613                         mi_lttng_element_version_patch_level, version->version_patchlevel);
 614         if (ret) {
 615                 goto end;
 616         }
 617
 618         /* Name of the version */
 619         ret = mi_lttng_writer_write_element_string(writer,
 620                         config_element_name, version->version_name);
 621         if (ret) {
 622                 goto end;
 623         }
 624
 625         /* Description mostly related to beer... */
 626         ret = mi_lttng_writer_write_element_string(writer,
 627                         mi_lttng_element_version_description, lttng_description);
 628         if (ret) {
 629                 goto end;
 630         }
 631
 632         /* url */
 633         ret = mi_lttng_writer_write_element_string(writer,
 634                         mi_lttng_element_version_web, version->package_url);
 635         if (ret) {
 636                 goto end;
 637         }
 638
 639         /* License: free as in free beer...no...*speech* */
 640         ret = mi_lttng_writer_write_element_string(writer,
 641                         mi_lttng_element_version_license, lttng_license);
 642         if (ret) {
 643                 goto end;
 644         }
 645
 646         /* Close version element */
 647         ret = mi_lttng_writer_close_element(writer);
 648
 649 end:
 650         return ret;
 651 }
 652
 653 LTTNG_HIDDEN
 654 int mi_lttng_sessions_open(struct mi_writer *writer)
 655 {
 656         return mi_lttng_writer_open_element(writer, config_element_sessions);
 657 }
 658
 659 LTTNG_HIDDEN
 660 int mi_lttng_session(struct mi_writer *writer,
 661                 struct lttng_session *session, int is_open)
 662 {
 663         int ret;
 664
 665         assert(session);
 666
 667         /* Open sessions element */
 668         ret = mi_lttng_writer_open_element(writer,
 669                         config_element_session);
 670         if (ret) {
 671                 goto end;
 672         }
 673
 674         /* Name of the session */
 675         ret = mi_lttng_writer_write_element_string(writer,
 676                         config_element_name, session->name);
 677         if (ret) {
 678                 goto end;
 679         }
 680
 681         /* Path */
 682         ret = mi_lttng_writer_write_element_string(writer,
 683                         config_element_path, session->path);
 684         if (ret) {
 685                 goto end;
 686         }
 687
 688         /* Enabled ? */
 689         ret = mi_lttng_writer_write_element_bool(writer,
 690                         config_element_enabled, session->enabled);
 691         if (ret) {
 692                 goto end;
 693         }
 694
 695         /* Snapshot mode */
 696         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 697                         config_element_snapshot_mode, session->snapshot_mode);
 698         if (ret) {
 699                 goto end;
 700         }
 701
 702         /* Live timer interval in usec */
 703         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 704                         config_element_live_timer_interval,
 705                         session->live_timer_interval);
 706         if (ret) {
 707                 goto end;
 708         }
 709
 710         if (!is_open) {
 711                 /* Closing session element */
 712                 ret = mi_lttng_writer_close_element(writer);
 713         }
 714 end:
 715         return ret;
 716
 717 }
 718
 719 LTTNG_HIDDEN
 720 int mi_lttng_domains_open(struct mi_writer *writer)
 721 {
 722         return mi_lttng_writer_open_element(writer, config_element_domains);
 723 }
 724
 725 LTTNG_HIDDEN
 726 int mi_lttng_domain(struct mi_writer *writer,
 727                 struct lttng_domain *domain, int is_open)
 728 {
 729         int ret = 0;
 730         const char *str_domain;
 731         const char *str_buffer;
 732
 733         assert(domain);
 734
 735         /* Open domain element */
 736         ret = mi_lttng_writer_open_element(writer, config_element_domain);
 737         if (ret) {
 738                 goto end;
 739         }
 740
 741         /* Domain Type */
 742         str_domain = mi_lttng_domaintype_string(domain->type);
 743         ret = mi_lttng_writer_write_element_string(writer, config_element_type,
 744                         str_domain);
 745         if (ret) {
 746                 goto end;
 747         }
 748
 749         /* Buffer Type */
 750         str_buffer= mi_lttng_buffertype_string(domain->buf_type);
 751         ret = mi_lttng_writer_write_element_string(writer,
 752                         config_element_buffer_type, str_buffer);
 753         if (ret) {
 754                 goto end;
 755         }
 756
 757         /* TODO: union  attr
 758          * This union is not currently used and was added for
 759          * future ust domain support.
 760          * Date: 25-06-2014
 761          * */
 762
 763         if (!is_open) {
 764                 /* Closing domain element */
 765                 ret = mi_lttng_writer_close_element(writer);
 766         }
 767
 768 end:
 769         return ret;
 770
 771 }
 772
 773 LTTNG_HIDDEN
 774 int mi_lttng_channels_open(struct mi_writer *writer)
 775 {
 776         return mi_lttng_writer_open_element(writer, config_element_channels);
 777 }
 778
 779 LTTNG_HIDDEN
 780 int mi_lttng_channel(struct mi_writer *writer,
 781                 struct lttng_channel *channel, int is_open)
 782 {
 783         int ret = 0;
 784
 785         assert(channel);
 786
 787         /* Opening channel element */
 788         ret = mi_lttng_writer_open_element(writer, config_element_channel);
 789         if (ret) {
 790                 goto end;
 791         }
 792
 793         /* Name */
 794         ret = mi_lttng_writer_write_element_string(writer, config_element_name,
 795                         channel->name);
 796         if (ret) {
 797                 goto end;
 798         }
 799
 800         /* Enabled ? */
 801         ret = mi_lttng_writer_write_element_bool(writer,
 802                         config_element_enabled, channel->enabled);
 803         if (ret) {
 804                 goto end;
 805         }
 806
 807         /* Attribute */
 808         ret = mi_lttng_channel_attr(writer, &channel->attr);
 809         if (ret) {
 810                 goto end;
 811         }
 812
 813         if (!is_open) {
 814                 /* Closing channel element */
 815                 ret = mi_lttng_writer_close_element(writer);
 816                 if (ret) {
 817                         goto end;
 818                 }
 819         }
 820 end:
 821         return ret;
 822 }
 823
 824 LTTNG_HIDDEN
 825 int mi_lttng_channel_attr(struct mi_writer *writer,
 826                 struct lttng_channel_attr *attr)
 827 {
 828         int ret = 0;
 829
 830         assert(attr);
 831
 832         /* Opening Attributes */
 833         ret = mi_lttng_writer_open_element(writer, config_element_attributes);
 834         if (ret) {
 835                 goto end;
 836         }
 837
 838         /* Overwrite */
 839         ret = mi_lttng_writer_write_element_string(writer,
 840                 config_element_overwrite_mode,
 841                 attr->overwrite ? config_overwrite_mode_overwrite :
 842                         config_overwrite_mode_discard);
 843         if (ret) {
 844                 goto end;
 845         }
 846
 847         /* Sub buffer size in byte */
 848         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 849                 config_element_subbuf_size, attr->subbuf_size);
 850         if (ret) {
 851                 goto end;
 852         }
 853
 854         /* Number of subbuffer (power of two) */
 855         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 856                 config_element_num_subbuf,
 857                 attr->num_subbuf);
 858         if (ret) {
 859                 goto end;
 860         }
 861
 862         /* Switch timer interval in usec */
 863         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 864                 config_element_switch_timer_interval,
 865                 attr->switch_timer_interval);
 866         if (ret) {
 867                 goto end;
 868         }
 869
 870         /* Read timer interval in usec */
 871         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 872                 config_element_read_timer_interval,
 873                 attr->read_timer_interval);
 874         if (ret) {
 875                 goto end;
 876         }
 877
 878         /* Event output */
 879         ret = mi_lttng_writer_write_element_string(writer,
 880                 config_element_output_type,
 881                 attr->output == LTTNG_EVENT_SPLICE ?
 882                 config_output_type_splice : config_output_type_mmap);
 883         if (ret) {
 884                 goto end;
 885         }
 886
 887         /* Tracefile size in bytes */
 888         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 889                 config_element_tracefile_size, attr->tracefile_size);
 890         if (ret) {
 891                 goto end;
 892         }
 893
 894         /* Count of tracefiles */
 895         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 896                 config_element_tracefile_count,
 897                 attr->tracefile_count);
 898         if (ret) {
 899                 goto end;
 900         }
 901
 902         /* Live timer interval in usec*/
 903         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 904                 config_element_live_timer_interval,
 905                 attr->live_timer_interval);
 906         if (ret) {
 907                 goto end;
 908         }
 909
 910         /* Closing attributes */
 911         ret = mi_lttng_writer_close_element(writer);
 912         if (ret) {
 913                 goto end;
 914         }
 915 end:
 916         return ret;
 917
 918 }
 919
 920 LTTNG_HIDDEN
 921 int mi_lttng_event_common_attributes(struct mi_writer *writer,
 922                 struct lttng_event *event)
 923 {
 924         int ret;
 925         const char *filter_expression;
 926
 927         /* Open event element */
 928         ret = mi_lttng_writer_open_element(writer, config_element_event);
 929         if (ret) {
 930                 goto end;
 931         }
 932
 933         /* Event name */
 934         ret = mi_lttng_writer_write_element_string(writer,
 935                         config_element_name, event->name);
 936         if (ret) {
 937                 goto end;
 938         }
 939
 940         /* Event type */
 941         ret = mi_lttng_writer_write_element_string(writer,
 942                         config_element_type, mi_lttng_eventtype_string(event->type));
 943         if (ret) {
 944                 goto end;
 945         }
 946
 947         /* Is event enabled */
 948         ret = mi_lttng_writer_write_element_bool(writer,
 949                         config_element_enabled, event->enabled);
 950         if (ret) {
 951                 goto end;
 952         }
 953
 954         /* Event filter expression */
 955         ret = lttng_event_get_filter_string(event, &filter_expression);
 956         if (ret) {
 957                 goto end;
 958         }
 959
 960         if (filter_expression) {
 961                 ret = mi_lttng_writer_write_element_string(writer,
 962                                 config_element_filter_expression,
 963                                 filter_expression);
 964                 if (ret) {
 965                         goto end;
 966                 }
 967         }
 968
 969 end:
 970         return ret;
 971 }
 972
 973 LTTNG_HIDDEN
 974 int mi_lttng_event_tracepoint_loglevel(struct mi_writer *writer,
 975                 struct lttng_event *event, enum lttng_domain_type domain)
 976 {
 977         int ret;
 978
 979         /* Event loglevel */
 980         ret = mi_lttng_writer_write_element_string(writer,
 981                         config_element_loglevel,
 982                         mi_lttng_loglevel_string(event->loglevel, domain));
 983         if (ret) {
 984                 goto end;
 985         }
 986
 987         /* Log level type */
 988         ret = mi_lttng_writer_write_element_string(writer,
 989                         config_element_loglevel_type,
 990                         mi_lttng_logleveltype_string(event->loglevel_type));
 991         if (ret) {
 992                 goto end;
 993         }
 994
 995         /* event exclusion filter */
 996         ret = mi_lttng_writer_write_element_bool(writer,
 997                         config_element_exclusion, event->exclusion);
 998         if (ret) {
 999                 goto end;
1000         }
1001
1002 end:
1003         return ret;
1004 }
1005
1006 LTTNG_HIDDEN
1007 int mi_lttng_event_tracepoint_no_loglevel(struct mi_writer *writer,
1008                 struct lttng_event *event)
1009 {
1010         /* event exclusion filter */
1011         return mi_lttng_writer_write_element_bool(writer,
1012                         config_element_exclusion, event->exclusion);
1013 }
1014
1015 LTTNG_HIDDEN
1016 int mi_lttng_event_function_probe(struct mi_writer *writer,
1017                 struct lttng_event *event)
1018 {
1019         int ret;
1020
1021         ret = mi_lttng_writer_open_element(writer, config_element_attributes);
1022         if (ret) {
1023                 goto end;
1024         }
1025
1026         ret = mi_lttng_writer_open_element(writer, config_element_probe_attributes);
1027         if (ret) {
1028                 goto end;
1029         }
1030
1031         if (event->attr.probe.addr != 0) {
1032                 /* event probe address */
1033                 ret = mi_lttng_writer_write_element_unsigned_int(writer,
1034                                 config_element_address, event->attr.probe.addr);
1035                 if (ret) {
1036                         goto end;
1037                 }
1038         } else {
1039                 /* event probe offset */
1040                 ret = mi_lttng_writer_write_element_unsigned_int(writer,
1041                                 config_element_offset, event->attr.probe.offset);
1042                 if (ret) {
1043                         goto end;
1044                 }
1045
1046                 /* event probe symbol_name */
1047                 ret = mi_lttng_writer_write_element_string(writer,
1048                                 config_element_symbol_name, event->attr.probe.symbol_name);
1049                 if (ret) {
1050                         goto end;
1051                 }
1052         }
1053
1054         /* Close probe_attributes and attributes */
1055         ret = mi_lttng_close_multi_element(writer, 2);
1056 end:
1057         return ret;
1058 }
1059
1060 LTTNG_HIDDEN
1061 int mi_lttng_event_function_entry(struct mi_writer *writer,
1062                 struct lttng_event *event)
1063 {
1064         int ret;
1065
1066         ret = mi_lttng_writer_open_element(writer, config_element_attributes);
1067         if (ret) {
1068                 goto end;
1069         }
1070
1071         ret = mi_lttng_writer_open_element(writer, config_element_probe_attributes);
1072         if (ret) {
1073                 goto end;
1074         }
1075
1076         /* event probe symbol_name */
1077         ret = mi_lttng_writer_write_element_string(writer,
1078                         config_element_symbol_name, event->attr.ftrace.symbol_name);
1079         if (ret) {
1080                 goto end;
1081         }
1082
1083         /* Close function_attributes and attributes */
1084         ret = mi_lttng_close_multi_element(writer, 2);
1085 end:
1086         return ret;
1087 }
1088
1089 LTTNG_HIDDEN
1090 int mi_lttng_events_open(struct mi_writer *writer)
1091 {
1092         return mi_lttng_writer_open_element(writer, config_element_events);
1093 }
1094
1095 LTTNG_HIDDEN
1096 int mi_lttng_event(struct mi_writer *writer,
1097                 struct lttng_event *event, int is_open, enum lttng_domain_type domain)
1098 {
1099         int ret;
1100
1101         ret = mi_lttng_event_common_attributes(writer, event);
1102         if (ret) {
1103                 goto end;
1104         }
1105
1106         switch (event->type) {
1107         case LTTNG_EVENT_TRACEPOINT:
1108         {
1109                 if (event->loglevel != -1) {
1110                         ret = mi_lttng_event_tracepoint_loglevel(writer, event, domain);
1111                 } else {
1112                         ret = mi_lttng_event_tracepoint_no_loglevel(writer, event);
1113                 }
1114                 break;
1115         }
1116         case LTTNG_EVENT_FUNCTION:
1117                 /* Fallthrough */
1118         case LTTNG_EVENT_PROBE:
1119                 ret = mi_lttng_event_function_probe(writer, event);
1120                 break;
1121         case LTTNG_EVENT_FUNCTION_ENTRY:
1122                 ret = mi_lttng_event_function_entry(writer, event);
1123                 break;
1124         case LTTNG_EVENT_ALL:
1125                 /* Fallthrough */
1126         default:
1127                 break;
1128         }
1129
1130         if (!is_open) {
1131                 ret = mi_lttng_writer_close_element(writer);
1132         }
1133
1134 end:
1135         return ret;
1136 }
1137
1138 LTTNG_HIDDEN
1139 int mi_lttng_trackers_open(struct mi_writer *writer)
1140 {
1141         return mi_lttng_writer_open_element(writer, config_element_trackers);
1142 }
1143
1144 LTTNG_HIDDEN
1145 int mi_lttng_pid_tracker_open(struct mi_writer *writer)
1146 {
1147         int ret;
1148
1149         /* Open element pid_tracker */
1150         ret = mi_lttng_writer_open_element(writer, config_element_pid_tracker);
1151         if (ret) {
1152                 goto end;
1153         }
1154
1155         /* Open targets element */
1156         ret = mi_lttng_targets_open(writer);
1157 end:
1158         return ret;
1159 }
1160
1161 LTTNG_HIDDEN
1162 int mi_lttng_pids_open(struct mi_writer *writer)
1163 {
1164         return mi_lttng_writer_open_element(writer, config_element_pids);
1165 }
1166
1167 /*
1168  * TODO: move the listing of pid for user agent to process semantic on
1169  * mi api bump. The use of process element break the mi api.
1170  */
1171 LTTNG_HIDDEN
1172 int mi_lttng_pid(struct mi_writer *writer, pid_t pid , const char *name,
1173                 int is_open)
1174 {
1175         int ret;
1176
1177         /* Open pid process */
1178         ret = mi_lttng_writer_open_element(writer, config_element_pid);
1179         if (ret) {
1180                 goto end;
1181         }
1182
1183         /* Writing pid number */
1184         ret = mi_lttng_writer_write_element_signed_int(writer,
1185                         mi_lttng_element_pid_id, (int)pid);
1186         if (ret) {
1187                 goto end;
1188         }
1189
1190         /* Writing name of the process */
1191         if (name) {
1192                 ret = mi_lttng_writer_write_element_string(writer, config_element_name,
1193                                 name);
1194                 if (ret) {
1195                         goto end;
1196                 }
1197         }
1198
1199         if (!is_open) {
1200                 /* Closing Pid */
1201                 ret = mi_lttng_writer_close_element(writer);
1202         }
1203
1204 end:
1205         return ret;
1206 }
1207
1208 LTTNG_HIDDEN
1209 int mi_lttng_targets_open(struct mi_writer *writer)
1210 {
1211         return mi_lttng_writer_open_element(writer,
1212                         config_element_targets);
1213 }
1214
1215 LTTNG_HIDDEN
1216 int mi_lttng_pid_target(struct mi_writer *writer, pid_t pid, int is_open)
1217 {
1218         int ret;
1219
1220         ret = mi_lttng_writer_open_element(writer,
1221                         config_element_target_pid);
1222         if (ret) {
1223                 goto end;
1224         }
1225
1226         /* Writing pid number
1227          * Special case for element all on track untrack command
1228          * All pid is represented as wildcard *
1229          */
1230         if ((int) pid == -1) {
1231                 ret = mi_lttng_writer_write_element_string(writer,
1232                                 config_element_pid,
1233                                 mi_lttng_element_track_untrack_all_wildcard);
1234         } else {
1235                 ret = mi_lttng_writer_write_element_signed_int(writer,
1236                                 config_element_pid, (int) pid);
1237         }
1238         if (ret) {
1239                 goto end;
1240         }
1241
1242         if (!is_open) {
1243                 ret = mi_lttng_writer_close_element(writer);
1244                 if (ret) {
1245                         goto end;
1246                 }
1247         }
1248
1249 end:
1250         return ret;
1251 }
1252
1253 LTTNG_HIDDEN
1254 int mi_lttng_event_fields_open(struct mi_writer *writer)
1255 {
1256         return mi_lttng_writer_open_element(writer, mi_lttng_element_event_fields);
1257 }
1258
1259 LTTNG_HIDDEN
1260 int mi_lttng_event_field(struct mi_writer *writer,
1261                 struct lttng_event_field *field)
1262 {
1263         int ret;
1264
1265         if (!field->field_name[0]) {
1266                 ret = 0;
1267                 goto end;
1268         }
1269
1270         /* Open field */
1271         ret = mi_lttng_writer_open_element(writer, mi_lttng_element_event_field);
1272         if (ret) {
1273                 goto end;
1274         }
1275
1276         if (!field->field_name[0]) {
1277                 goto close;
1278         }
1279
1280         /* Name */
1281         ret = mi_lttng_writer_write_element_string(writer, config_element_name,
1282                         field->field_name);
1283         if (ret) {
1284                 goto end;
1285         }
1286
1287         /* Type */
1288         ret = mi_lttng_writer_write_element_string(writer, config_element_type,
1289                         mi_lttng_eventfieldtype_string(field->type));
1290         if (ret) {
1291                 goto end;
1292         }
1293
1294         /* nowrite  */
1295         ret = mi_lttng_writer_write_element_signed_int(writer,
1296                         mi_lttng_element_nowrite, field->nowrite);
1297         if (ret) {
1298                 goto end;
1299         }
1300
1301 close:
1302         /* Close field element */
1303         ret = mi_lttng_writer_close_element(writer);
1304
1305 end:
1306         return ret;
1307 }
1308
1309 LTTNG_HIDDEN
1310 int mi_lttng_calibrate(struct mi_writer *writer,
1311                 struct lttng_calibrate *calibrate)
1312 {
1313         int ret;
1314
1315         /* Open calibrate element */
1316         ret = mi_lttng_writer_open_element(writer, mi_lttng_element_calibrate);
1317         if (ret) {
1318                 goto end;
1319         }
1320
1321         /* Calibration type */
1322         ret = mi_lttng_writer_write_element_string(writer, config_element_type,
1323                         mi_lttng_calibratetype_string(calibrate->type));
1324         if (ret) {
1325                 goto end;
1326         }
1327
1328         /* Closing calibrate element */
1329         ret = mi_lttng_writer_close_element(writer);
1330 end:
1331         return ret;
1332 }
1333
1334 LTTNG_HIDDEN
1335 int mi_lttng_context(struct mi_writer *writer,
1336                 struct lttng_event_context *context, int is_open)
1337 {
1338         int ret;
1339         const char *type_string;
1340         struct lttng_event_perf_counter_ctx *perf_context;
1341         /* Open context */
1342         ret = mi_lttng_writer_open_element(writer , config_element_context);
1343         if (ret) {
1344                 goto end;
1345         }
1346
1347         type_string = mi_lttng_event_contexttype_string(context->ctx);
1348         if (!type_string) {
1349                 ret = -LTTNG_ERR_INVALID;
1350                 goto end;
1351         }
1352
1353         /* Print context type */
1354         ret = mi_lttng_writer_write_element_string(writer, config_element_type,
1355                         type_string);
1356
1357         /* Special case for PERF_*_COUNTER
1358          * print the lttng_event_perf_counter_ctx*/
1359         switch (context->ctx) {
1360         case LTTNG_EVENT_CONTEXT_PERF_COUNTER:
1361         case LTTNG_EVENT_CONTEXT_PERF_THREAD_COUNTER:
1362         case LTTNG_EVENT_CONTEXT_PERF_CPU_COUNTER:
1363                 perf_context = &context->u.perf_counter;
1364                 ret =  mi_lttng_perf_counter_context(writer, perf_context);
1365                 if (ret) {
1366                         goto end;
1367                 }
1368                 break;
1369         default:
1370                 break;
1371         }
1372
1373         /* Close context */
1374         if (!is_open) {
1375                 ret = mi_lttng_writer_close_element(writer);
1376         }
1377
1378 end:
1379         return ret;
1380 }
1381
1382 LTTNG_HIDDEN
1383 int mi_lttng_perf_counter_context(struct mi_writer *writer,
1384                 struct lttng_event_perf_counter_ctx  *perf_context)
1385 {
1386         int ret;
1387
1388         /* Open perf_counter_context */
1389         ret = mi_lttng_writer_open_element(writer,
1390                         mi_lttng_element_perf_counter_context);
1391         if (ret) {
1392                 goto end;
1393         }
1394
1395         /* Type */
1396         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1397                         config_element_type, perf_context->type);
1398         if (ret) {
1399                 goto end;
1400         }
1401
1402         /* Config */
1403         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1404                         config_element_config, perf_context->config);
1405         if (ret) {
1406                 goto end;
1407         }
1408
1409         /* Name of the perf counter */
1410         ret = mi_lttng_writer_write_element_string(writer,
1411                         config_element_name, perf_context->name);
1412         if (ret) {
1413                 goto end;
1414         }
1415
1416         /* Close perf_counter_context */
1417         ret = mi_lttng_writer_close_element(writer);
1418 end:
1419         return ret;
1420 }
1421
1422 LTTNG_HIDDEN
1423 int mi_lttng_snapshot_output_session_name(struct mi_writer *writer,
1424                 const char *session_name)
1425 {
1426         int ret;
1427
1428         /* Open session element */
1429         ret = mi_lttng_writer_open_element(writer, config_element_session);
1430         if (ret) {
1431                 goto end;
1432         }
1433
1434         /* Snapshot output list for current session name */
1435         ret = mi_lttng_writer_write_element_string(writer, config_element_name,
1436                         session_name);
1437         if (ret) {
1438                 goto end;
1439         }
1440
1441         /* Open element snapshots (sequence one snapshot) */
1442         ret = mi_lttng_writer_open_element(writer, mi_lttng_element_snapshots);
1443         if (ret) {
1444                 goto end;
1445         }
1446
1447 end:
1448         return ret;
1449 }
1450
1451 LTTNG_HIDDEN
1452 int mi_lttng_snapshot_list_output(struct mi_writer *writer,
1453                 struct lttng_snapshot_output *output)
1454 {
1455         int ret;
1456
1457         /* Open element snapshot output */
1458         ret = mi_lttng_writer_open_element(writer,
1459                         mi_lttng_element_command_snapshot);
1460         if (ret) {
1461                 goto end;
1462         }
1463
1464         /* ID of the snapshot output */
1465         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1466                         mi_lttng_element_id, output->id);
1467         if (ret) {
1468                 goto end;
1469         }
1470
1471         /* Name of the output */
1472         ret = mi_lttng_writer_write_element_string(writer, config_element_name,
1473                         output->name);
1474         if (ret) {
1475                 goto end;
1476         }
1477
1478         /* Destination of the output (ctrl_url)*/
1479         ret = mi_lttng_writer_write_element_string(writer,
1480                         mi_lttng_element_snapshot_ctrl_url, output->ctrl_url);
1481         if (ret) {
1482                 goto end;
1483         }
1484
1485         /* Destination of the output (data_url) */
1486         ret = mi_lttng_writer_write_element_string(writer,
1487                         mi_lttng_element_snapshot_data_url, output->data_url);
1488         if (ret) {
1489                 goto end;
1490         }
1491
1492         /* total size of all stream combined */
1493         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1494                         mi_lttng_element_snapshot_max_size, output->max_size);
1495         if (ret) {
1496                 goto end;
1497         }
1498
1499         /* Close snapshot output element */
1500         ret = mi_lttng_writer_close_element(writer);
1501
1502 end:
1503         return ret;
1504 }
1505
1506 LTTNG_HIDDEN
1507 int mi_lttng_snapshot_del_output(struct mi_writer *writer, int id,
1508                 const char *name, const char *current_session_name)
1509 {
1510         int ret;
1511
1512         /* Open element del_snapshot */
1513         ret = mi_lttng_writer_open_element(writer,
1514                         mi_lttng_element_command_snapshot);
1515         if (ret) {
1516                 goto end;
1517         }
1518
1519
1520         if (id != UINT32_MAX) {
1521                 /* "Snapshot output "id" successfully deleted
1522                  * for "current_session_name"
1523                  * ID of the snapshot output
1524                  */
1525                 ret = mi_lttng_writer_write_element_unsigned_int(writer,
1526                                 mi_lttng_element_id, id);
1527                 if (ret) {
1528                         goto end;
1529                 }
1530         } else {
1531                 /* "Snapshot output "name" successfully deleted
1532                  * for session "current_session_name"
1533                  * Name of the output
1534                  */
1535                 ret = mi_lttng_writer_write_element_string(writer, config_element_name,
1536                                 name);
1537                 if (ret) {
1538                         goto end;
1539                 }
1540         }
1541
1542         /* Snapshot was deleted for session "current_session_name"*/
1543         ret = mi_lttng_writer_write_element_string(writer,
1544                         mi_lttng_element_snapshot_session_name,
1545                         current_session_name);
1546         if (ret) {
1547                 goto end;
1548         }
1549
1550         /* Close snapshot element */
1551         ret = mi_lttng_writer_close_element(writer);
1552
1553 end:
1554         return ret;
1555 }
1556
1557 LTTNG_HIDDEN
1558 int mi_lttng_snapshot_add_output(struct mi_writer *writer,
1559                 const char *current_session_name, const char *n_ptr,
1560                 struct lttng_snapshot_output *output)
1561 {
1562         int ret;
1563
1564         /* Open element snapshot */
1565         ret = mi_lttng_writer_open_element(writer,
1566                         mi_lttng_element_command_snapshot);
1567         if (ret) {
1568                 goto end;
1569         }
1570
1571         /* Snapshot output id */
1572         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1573                         mi_lttng_element_id, output->id);
1574         if (ret) {
1575                 goto end;
1576         }
1577
1578         /* Snapshot output names */
1579         ret = mi_lttng_writer_write_element_string(writer,
1580                         config_element_name, n_ptr);
1581         if (ret) {
1582                 goto end;
1583         }
1584
1585         /* Destination of the output (ctrl_url)*/
1586         ret = mi_lttng_writer_write_element_string(writer,
1587                         mi_lttng_element_snapshot_ctrl_url, output->ctrl_url);
1588         if (ret) {
1589                 goto end;
1590         }
1591
1592         /* Snapshot added for session "current_session_name"*/
1593         ret = mi_lttng_writer_write_element_string(writer,
1594                         mi_lttng_element_snapshot_session_name, current_session_name);
1595         if (ret) {
1596                 goto end;
1597         }
1598
1599         /* total size of all stream combined */
1600         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1601                         mi_lttng_element_snapshot_max_size, output->max_size);
1602         if (ret) {
1603                 goto end;
1604         }
1605
1606         /* Close snapshot element */
1607         ret = mi_lttng_writer_close_element(writer);
1608
1609 end:
1610         return ret;
1611 }
1612
1613 LTTNG_HIDDEN
1614 int mi_lttng_snapshot_record(struct mi_writer *writer,
1615                 const char *current_session_name, const char *url,
1616                 const char *cmdline_ctrl_url, const char *cmdline_data_url)
1617 {
1618         int ret;
1619
1620         /* Open element snapshot */
1621         ret = mi_lttng_writer_open_element(writer,
1622                         mi_lttng_element_command_snapshot);
1623         if (ret) {
1624                 goto end;
1625         }
1626
1627         /*
1628          * If a valid an URL was given, serialize it,
1629          * else take the command line data and ctrl urls*/
1630         if (url) {
1631                 /* Destination of the output (ctrl_url)*/
1632                 ret = mi_lttng_writer_write_element_string(writer,
1633                                 mi_lttng_element_snapshot_ctrl_url, url);
1634                 if (ret) {
1635                         goto end;
1636                 }
1637         } else if (cmdline_ctrl_url) {
1638                 /* Destination of the output (ctrl_url)*/
1639                 ret = mi_lttng_writer_write_element_string(writer,
1640                                 mi_lttng_element_snapshot_ctrl_url, cmdline_ctrl_url);
1641                 if (ret) {
1642                         goto end;
1643                 }
1644
1645                 /* Destination of the output (data_url) */
1646                 ret = mi_lttng_writer_write_element_string(writer,
1647                                 mi_lttng_element_snapshot_data_url, cmdline_data_url);
1648                 if (ret) {
1649                         goto end;
1650                 }
1651         }
1652
1653         /* Close record_snapshot element */
1654         ret = mi_lttng_writer_close_element(writer);
1655
1656 end:
1657         return ret;
1658 }