src/common/mi-lttng.c

   1 /*
   2  * Copyright (C) 2014 - Jonathan Rajotte <jonathan.r.julien@gmail.com>
   3  *                    - Olivier Cotte <olivier.cotte@polymtl.ca>
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License, version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
  12  * more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along with
  15  * this program; if not, write to the Free Software Foundation, Inc., 51
  16  * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  17  */
  18
  19 #define _GNU_SOURCE
  20 #define _LGPL_SOURCE
  21 #include <include/config.h>
  22 #include <common/config/config.h>
  23 #include <lttng/snapshot-internal.h>
  24 #include "mi-lttng.h"
  25
  26 #include <assert.h>
  27
  28 /* Strings related to command */
  29 const char * const mi_lttng_element_command = "command";
  30 const char * const mi_lttng_element_command_action = "snapshot_action";
  31 const char * const mi_lttng_element_command_add_context = "add-context";
  32 const char * const mi_lttng_element_command_calibrate = "calibrate";
  33 const char * const mi_lttng_element_command_create = "create";
  34 const char * const mi_lttng_element_command_destroy = "destroy";
  35 const char * const mi_lttng_element_command_disable_channel = "disable-channel";
  36 const char * const mi_lttng_element_command_disable_event = "disable-event";
  37 const char * const mi_lttng_element_command_enable_channels = "enable-channel";
  38 const char * const mi_lttng_element_command_enable_event = "enable-event";
  39 const char * const mi_lttng_element_command_list = "list";
  40 const char * const mi_lttng_element_command_load = "load";
  41 const char * const mi_lttng_element_command_name = "name";
  42 const char * const mi_lttng_element_command_output = "output";
  43 const char * const mi_lttng_element_command_save = "save";
  44 const char * const mi_lttng_element_command_set_session = "set-session";
  45 const char * const mi_lttng_element_command_snapshot = "snapshot";
  46 const char * const mi_lttng_element_command_snapshot_add = "add_snapshot";
  47 const char * const mi_lttng_element_command_snapshot_del = "del_snapshot";
  48 const char * const mi_lttng_element_command_snapshot_list = "list_snapshot";
  49 const char * const mi_lttng_element_command_snapshot_record = "record_snapshot";
  50 const char * const mi_lttng_element_command_start = "start";
  51 const char * const mi_lttng_element_command_stop = "stop";
  52 const char * const mi_lttng_element_command_success = "success";
  53 const char * const mi_lttng_element_command_track = "track";
  54 const char * const mi_lttng_element_command_untrack = "untrack";
  55 const char * const mi_lttng_element_command_version = "version";
  56
  57 /* Strings related to version command */
  58 const char * const mi_lttng_element_version = "version";
  59 const char * const mi_lttng_element_version_commit = "commit";
  60 const char * const mi_lttng_element_version_description = "description";
  61 const char * const mi_lttng_element_version_license = "license";
  62 const char * const mi_lttng_element_version_major = "major";
  63 const char * const mi_lttng_element_version_minor = "minor";
  64 const char * const mi_lttng_element_version_patch_level = "patchLevel";
  65 const char * const mi_lttng_element_version_str = "string";
  66 const char * const mi_lttng_element_version_web = "url";
  67
  68 /* String related to a lttng_event_field */
  69 const char * const mi_lttng_element_event_field = "event_field";
  70 const char * const mi_lttng_element_event_fields = "event_fields";
  71
  72 /* String related to lttng_event_context */
  73 const char * const mi_lttng_context_type_perf_counter = "PERF_COUNTER";
  74 const char * const mi_lttng_context_type_perf_cpu_counter = "PERF_CPU_COUNTER";
  75 const char * const mi_lttng_context_type_perf_thread_counter = "PERF_THREAD_COUNTER";
  76
  77 /* String related to lttng_event_perf_counter_ctx */
  78 const char * const mi_lttng_element_perf_counter_context = "perf_counter_context";
  79
  80 /* Strings related to pid */
  81 const char * const mi_lttng_element_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 /* String related to track/untrack command */
 166 const char * const mi_lttng_element_track_untrack_targets = "targets";
 167 const char * const mi_lttng_element_track_untrack_pid_target = "pid_target";
 168 const char * const mi_lttng_element_track_untrack_all_wildcard = "*";
 169
 170
 171 /* This is a merge of jul loglevel and regular loglevel
 172  * Those should never overlap by definition
 173  * (see struct lttng_event loglevel)
 174  */
 175 LTTNG_HIDDEN
 176 const char *mi_lttng_loglevel_string(int value, enum lttng_domain_type domain)
 177 {
 178         switch (domain) {
 179         case LTTNG_DOMAIN_KERNEL:
 180         case LTTNG_DOMAIN_UST:
 181                 switch (value) {
 182                 case -1:
 183                         return mi_lttng_element_empty;
 184                 case LTTNG_LOGLEVEL_EMERG:
 185                         return mi_lttng_loglevel_str_emerg;
 186                 case LTTNG_LOGLEVEL_ALERT:
 187                         return mi_lttng_loglevel_str_alert;
 188                 case LTTNG_LOGLEVEL_CRIT:
 189                         return mi_lttng_loglevel_str_crit;
 190                 case LTTNG_LOGLEVEL_ERR:
 191                         return mi_lttng_loglevel_str_err;
 192                 case LTTNG_LOGLEVEL_WARNING:
 193                         return mi_lttng_loglevel_str_warning;
 194                 case LTTNG_LOGLEVEL_NOTICE:
 195                         return mi_lttng_loglevel_str_notice;
 196                 case LTTNG_LOGLEVEL_INFO:
 197                         return mi_lttng_loglevel_str_info;
 198                 case LTTNG_LOGLEVEL_DEBUG_SYSTEM:
 199                         return mi_lttng_loglevel_str_debug_system;
 200                 case LTTNG_LOGLEVEL_DEBUG_PROGRAM:
 201                         return mi_lttng_loglevel_str_debug_program;
 202                 case LTTNG_LOGLEVEL_DEBUG_PROCESS:
 203                         return mi_lttng_loglevel_str_debug_process;
 204                 case LTTNG_LOGLEVEL_DEBUG_MODULE:
 205                         return mi_lttng_loglevel_str_debug_module;
 206                 case LTTNG_LOGLEVEL_DEBUG_UNIT:
 207                         return mi_lttng_loglevel_str_debug_unit;
 208                 case LTTNG_LOGLEVEL_DEBUG_FUNCTION:
 209                         return mi_lttng_loglevel_str_debug_function;
 210                 case LTTNG_LOGLEVEL_DEBUG_LINE:
 211                         return mi_lttng_loglevel_str_debug_line;
 212                 case LTTNG_LOGLEVEL_DEBUG:
 213                         return mi_lttng_loglevel_str_debug;
 214                 default:
 215                         return mi_lttng_loglevel_str_unknown;
 216                 }
 217                 break;
 218         case LTTNG_DOMAIN_LOG4J:
 219                 switch (value) {
 220                 case -1:
 221                         return mi_lttng_element_empty;
 222                 case LTTNG_LOGLEVEL_LOG4J_OFF:
 223                         return mi_lttng_loglevel_str_log4j_off;
 224                 case LTTNG_LOGLEVEL_LOG4J_FATAL:
 225                         return mi_lttng_loglevel_str_log4j_fatal;
 226                 case LTTNG_LOGLEVEL_LOG4J_ERROR:
 227                         return mi_lttng_loglevel_str_log4j_error;
 228                 case LTTNG_LOGLEVEL_LOG4J_WARN:
 229                         return mi_lttng_loglevel_str_log4j_warn;
 230                 case LTTNG_LOGLEVEL_LOG4J_INFO:
 231                         return mi_lttng_loglevel_str_log4j_info;
 232                 case LTTNG_LOGLEVEL_LOG4J_DEBUG:
 233                         return mi_lttng_loglevel_str_log4j_debug;
 234                 case LTTNG_LOGLEVEL_LOG4J_TRACE:
 235                         return mi_lttng_loglevel_str_log4j_trace;
 236                 case LTTNG_LOGLEVEL_LOG4J_ALL:
 237                         return mi_lttng_loglevel_str_log4j_all;
 238                 default:
 239                         return mi_lttng_loglevel_str_unknown;
 240                 }
 241                 break;
 242         case LTTNG_DOMAIN_JUL:
 243                 switch (value) {
 244                 case -1:
 245                         return mi_lttng_element_empty;
 246                 case LTTNG_LOGLEVEL_JUL_OFF:
 247                         return mi_lttng_loglevel_str_jul_off;
 248                 case LTTNG_LOGLEVEL_JUL_SEVERE:
 249                         return mi_lttng_loglevel_str_jul_severe;
 250                 case LTTNG_LOGLEVEL_JUL_WARNING:
 251                         return mi_lttng_loglevel_str_jul_warning;
 252                 case LTTNG_LOGLEVEL_JUL_INFO:
 253                         return mi_lttng_loglevel_str_jul_info;
 254                 case LTTNG_LOGLEVEL_JUL_CONFIG:
 255                         return mi_lttng_loglevel_str_jul_config;
 256                 case LTTNG_LOGLEVEL_JUL_FINE:
 257                         return mi_lttng_loglevel_str_jul_fine;
 258                 case LTTNG_LOGLEVEL_JUL_FINER:
 259                         return mi_lttng_loglevel_str_jul_finer;
 260                 case LTTNG_LOGLEVEL_JUL_FINEST:
 261                         return mi_lttng_loglevel_str_jul_finest;
 262                 case LTTNG_LOGLEVEL_JUL_ALL:
 263                         return mi_lttng_loglevel_str_jul_all;
 264                 default:
 265                         return mi_lttng_loglevel_str_unknown;
 266                 }
 267                 break;
 268         case LTTNG_DOMAIN_PYTHON:
 269                 switch (value) {
 270                 case LTTNG_LOGLEVEL_PYTHON_CRITICAL:
 271                         return mi_lttng_loglevel_str_python_critical;
 272                 case LTTNG_LOGLEVEL_PYTHON_ERROR:
 273                         return mi_lttng_loglevel_str_python_error;
 274                 case LTTNG_LOGLEVEL_PYTHON_WARNING:
 275                         return mi_lttng_loglevel_str_python_warning;
 276                 case LTTNG_LOGLEVEL_PYTHON_INFO:
 277                         return mi_lttng_loglevel_str_python_info;
 278                 case LTTNG_LOGLEVEL_PYTHON_DEBUG:
 279                         return mi_lttng_loglevel_str_python_debug;
 280                 case LTTNG_LOGLEVEL_PYTHON_NOTSET:
 281                         return mi_lttng_loglevel_str_python_notset;
 282                 default:
 283                         return mi_lttng_loglevel_str_unknown;
 284                 }
 285                 break;
 286         }
 287
 288         /* Reaching this means the domain is unknown. */
 289         return mi_lttng_loglevel_str_unknown;
 290 }
 291
 292 LTTNG_HIDDEN
 293 const char *mi_lttng_logleveltype_string(enum lttng_loglevel_type value)
 294 {
 295         switch (value) {
 296         case LTTNG_EVENT_LOGLEVEL_ALL:
 297                 return mi_lttng_loglevel_type_all;
 298         case LTTNG_EVENT_LOGLEVEL_RANGE:
 299                 return mi_lttng_loglevel_type_range;
 300         case LTTNG_EVENT_LOGLEVEL_SINGLE:
 301                 return mi_lttng_loglevel_type_single;
 302         default:
 303                 return mi_lttng_loglevel_type_unknown;
 304         }
 305 }
 306
 307 LTTNG_HIDDEN
 308 const char *mi_lttng_eventtype_string(enum lttng_event_type value)
 309 {
 310         switch (value) {
 311         case LTTNG_EVENT_ALL:
 312                 return config_event_type_all;
 313         case LTTNG_EVENT_TRACEPOINT:
 314                 return config_event_type_tracepoint;
 315         case LTTNG_EVENT_PROBE:
 316                 return config_event_type_probe;
 317         case LTTNG_EVENT_FUNCTION:
 318                 return config_event_type_function;
 319         case LTTNG_EVENT_FUNCTION_ENTRY:
 320                 return config_event_type_function_entry;
 321         case LTTNG_EVENT_SYSCALL:
 322                 return config_event_type_syscall;
 323         case LTTNG_EVENT_NOOP:
 324                 return config_event_type_noop;
 325         default:
 326                 return mi_lttng_element_empty;
 327         }
 328 }
 329
 330 LTTNG_HIDDEN
 331 const char *mi_lttng_event_contexttype_string(enum lttng_event_context_type val)
 332 {
 333         switch (val) {
 334         case LTTNG_EVENT_CONTEXT_PID:
 335                 return config_event_context_pid;
 336         case LTTNG_EVENT_CONTEXT_PERF_COUNTER:
 337                 return mi_lttng_context_type_perf_counter;
 338         case LTTNG_EVENT_CONTEXT_PERF_THREAD_COUNTER:
 339                 return mi_lttng_context_type_perf_thread_counter;
 340         case LTTNG_EVENT_CONTEXT_PERF_CPU_COUNTER:
 341                 return mi_lttng_context_type_perf_cpu_counter;
 342         case LTTNG_EVENT_CONTEXT_PROCNAME:
 343                 return config_event_context_procname;
 344         case LTTNG_EVENT_CONTEXT_PRIO:
 345                 return config_event_context_prio;
 346         case LTTNG_EVENT_CONTEXT_NICE:
 347                 return config_event_context_nice;
 348         case LTTNG_EVENT_CONTEXT_VPID:
 349                 return config_event_context_vpid;
 350         case LTTNG_EVENT_CONTEXT_TID:
 351                 return config_event_context_tid;
 352         case LTTNG_EVENT_CONTEXT_VTID:
 353                 return config_event_context_vtid;
 354         case LTTNG_EVENT_CONTEXT_PPID:
 355                 return config_event_context_ppid;
 356         case LTTNG_EVENT_CONTEXT_VPPID:
 357                 return config_event_context_vppid;
 358         case LTTNG_EVENT_CONTEXT_PTHREAD_ID:
 359                 return config_event_context_pthread_id;
 360         case LTTNG_EVENT_CONTEXT_HOSTNAME:
 361                 return config_event_context_hostname;
 362         case LTTNG_EVENT_CONTEXT_IP:
 363                 return config_event_context_ip;
 364         default:
 365                 return NULL;
 366         }
 367 }
 368
 369 LTTNG_HIDDEN
 370 const char *mi_lttng_eventfieldtype_string(enum lttng_event_field_type val)
 371 {
 372         switch (val) {
 373         case(LTTNG_EVENT_FIELD_INTEGER):
 374                 return mi_lttng_element_type_integer;
 375         case(LTTNG_EVENT_FIELD_ENUM):
 376                 return mi_lttng_element_type_enum;
 377         case(LTTNG_EVENT_FIELD_FLOAT):
 378                 return mi_lttng_element_type_float;
 379         case(LTTNG_EVENT_FIELD_STRING):
 380                 return mi_lttng_element_type_string;
 381         default:
 382                 return mi_lttng_element_type_other;
 383         }
 384 }
 385
 386 LTTNG_HIDDEN
 387 const char *mi_lttng_domaintype_string(enum lttng_domain_type value)
 388 {
 389         /* Note: This is a *duplicate* of get_domain_str from bin/lttng/utils.c */
 390         switch (value) {
 391         case LTTNG_DOMAIN_KERNEL:
 392                 return config_domain_type_kernel;
 393         case LTTNG_DOMAIN_UST:
 394                 return config_domain_type_ust;
 395         case LTTNG_DOMAIN_JUL:
 396                 return config_domain_type_jul;
 397         case LTTNG_DOMAIN_LOG4J:
 398                 return config_domain_type_log4j;
 399         case LTTNG_DOMAIN_PYTHON:
 400                 return config_domain_type_python;
 401         default:
 402                 /* Should not have an unknown domain */
 403                 assert(0);
 404         }
 405 }
 406
 407 LTTNG_HIDDEN
 408 const char *mi_lttng_buffertype_string(enum lttng_buffer_type value)
 409 {
 410         switch (value) {
 411         case LTTNG_BUFFER_PER_PID:
 412                 return config_buffer_type_per_pid;
 413         case LTTNG_BUFFER_PER_UID:
 414                 return config_buffer_type_per_uid;
 415         case LTTNG_BUFFER_GLOBAL:
 416                 return config_buffer_type_global;
 417         default:
 418                 /* Should not have an unknow buffer type */
 419                 assert(0);
 420         }
 421 }
 422
 423 LTTNG_HIDDEN
 424 const char *mi_lttng_calibratetype_string(enum lttng_calibrate_type val)
 425 {
 426         const char *ret;
 427
 428         switch (val) {
 429         case LTTNG_CALIBRATE_FUNCTION:
 430                 ret = mi_lttng_element_calibrate_function;
 431                 break;
 432         default:
 433                 ret = mi_lttng_element_empty;
 434                 break;
 435         }
 436         return ret;
 437 }
 438
 439 LTTNG_HIDDEN
 440 struct mi_writer *mi_lttng_writer_create(int fd_output, int mi_output_type)
 441 {
 442         struct mi_writer *mi_writer;
 443
 444         mi_writer = zmalloc(sizeof(struct mi_writer));
 445         if (!mi_writer) {
 446                 PERROR("zmalloc mi_writer_create");
 447                 goto end;
 448         }
 449         if (mi_output_type == LTTNG_MI_XML) {
 450                 mi_writer->writer = config_writer_create(fd_output, 0);
 451                 if (!mi_writer->writer) {
 452                         goto err_destroy;
 453                 }
 454                 mi_writer->type = LTTNG_MI_XML;
 455         } else {
 456                 goto err_destroy;
 457         }
 458
 459 end:
 460         return mi_writer;
 461
 462 err_destroy:
 463         free(mi_writer);
 464         return NULL;
 465 }
 466
 467 LTTNG_HIDDEN
 468 int mi_lttng_writer_destroy(struct mi_writer *writer)
 469 {
 470         int ret;
 471
 472         if (!writer) {
 473                 ret = -EINVAL;
 474                 goto end;
 475         }
 476
 477         ret = config_writer_destroy(writer->writer);
 478         if (ret < 0) {
 479                 goto end;
 480         }
 481
 482         free(writer);
 483 end:
 484         return ret;
 485 }
 486
 487 LTTNG_HIDDEN
 488 int mi_lttng_writer_command_open(struct mi_writer *writer, const char *command)
 489 {
 490         int ret;
 491
 492         ret = mi_lttng_writer_open_element(writer, mi_lttng_element_command);
 493         if (ret) {
 494                 goto end;
 495         }
 496         ret = mi_lttng_writer_write_element_string(writer,
 497                         mi_lttng_element_command_name, command);
 498 end:
 499         return ret;
 500 }
 501
 502 LTTNG_HIDDEN
 503 int mi_lttng_writer_command_close(struct mi_writer *writer)
 504 {
 505         return mi_lttng_writer_close_element(writer);
 506 }
 507
 508 LTTNG_HIDDEN
 509 int mi_lttng_writer_open_element(struct mi_writer *writer,
 510                 const char *element_name)
 511 {
 512         return config_writer_open_element(writer->writer, element_name);
 513 }
 514
 515 LTTNG_HIDDEN
 516 int mi_lttng_writer_close_element(struct mi_writer *writer)
 517 {
 518         return config_writer_close_element(writer->writer);
 519 }
 520
 521 LTTNG_HIDDEN
 522 int mi_lttng_close_multi_element(struct mi_writer *writer,
 523                 unsigned int nb_element)
 524 {
 525         int ret, i;
 526
 527         if (nb_element < 1) {
 528                 ret = 0;
 529                 goto end;
 530         }
 531         for (i = 0; i < nb_element; i++) {
 532                 ret = mi_lttng_writer_close_element(writer);
 533                 if (ret) {
 534                         goto end;
 535                 }
 536         }
 537 end:
 538         return ret;
 539 }
 540
 541 LTTNG_HIDDEN
 542 int mi_lttng_writer_write_element_unsigned_int(struct mi_writer *writer,
 543                 const char *element_name, uint64_t value)
 544 {
 545         return config_writer_write_element_unsigned_int(writer->writer,
 546                         element_name, value);
 547 }
 548
 549 LTTNG_HIDDEN
 550 int mi_lttng_writer_write_element_signed_int(struct mi_writer *writer,
 551                 const char *element_name, int64_t value)
 552 {
 553         return config_writer_write_element_signed_int(writer->writer,
 554                         element_name, value);
 555 }
 556
 557 LTTNG_HIDDEN
 558 int mi_lttng_writer_write_element_bool(struct mi_writer *writer,
 559                 const char *element_name, int value)
 560 {
 561         return config_writer_write_element_bool(writer->writer,
 562                         element_name, value);
 563 }
 564
 565 LTTNG_HIDDEN
 566 int mi_lttng_writer_write_element_string(struct mi_writer *writer,
 567                 const char *element_name, const char *value)
 568 {
 569         return config_writer_write_element_string(writer->writer,
 570                         element_name, value);
 571 }
 572
 573 LTTNG_HIDDEN
 574 int mi_lttng_version(struct mi_writer *writer, struct mi_lttng_version *version,
 575         const char *lttng_description, const char *lttng_license)
 576 {
 577         int ret;
 578
 579         /* Open version */
 580         ret = mi_lttng_writer_open_element(writer, mi_lttng_element_version);
 581         if (ret) {
 582                 goto end;
 583         }
 584
 585         /* Version string (contain info like rc etc.) */
 586         ret = mi_lttng_writer_write_element_string(writer,
 587                         mi_lttng_element_version_str, version->version);
 588         if (ret) {
 589                 goto end;
 590         }
 591
 592         /* Major version number */
 593         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 594                         mi_lttng_element_version_major, version->version_major);
 595         if (ret) {
 596                 goto end;
 597         }
 598
 599         /* Minor version number */
 600         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 601                         mi_lttng_element_version_minor, version->version_minor);
 602         if (ret) {
 603                 goto end;
 604         }
 605
 606         /* Commit version number */
 607         ret = mi_lttng_writer_write_element_string(writer,
 608                         mi_lttng_element_version_commit, version->version_commit);
 609         if (ret) {
 610                 goto end;
 611         }
 612
 613         /* Patch number */
 614         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 615                         mi_lttng_element_version_patch_level, version->version_patchlevel);
 616         if (ret) {
 617                 goto end;
 618         }
 619
 620         /* Name of the version */
 621         ret = mi_lttng_writer_write_element_string(writer,
 622                         config_element_name, version->version_name);
 623         if (ret) {
 624                 goto end;
 625         }
 626
 627         /* Description mostly related to beer... */
 628         ret = mi_lttng_writer_write_element_string(writer,
 629                         mi_lttng_element_version_description, lttng_description);
 630         if (ret) {
 631                 goto end;
 632         }
 633
 634         /* url */
 635         ret = mi_lttng_writer_write_element_string(writer,
 636                         mi_lttng_element_version_web, version->package_url);
 637         if (ret) {
 638                 goto end;
 639         }
 640
 641         /* License: free as in free beer...no...*speech* */
 642         ret = mi_lttng_writer_write_element_string(writer,
 643                         mi_lttng_element_version_license, lttng_license);
 644         if (ret) {
 645                 goto end;
 646         }
 647
 648         /* Close version element */
 649         ret = mi_lttng_writer_close_element(writer);
 650
 651 end:
 652         return ret;
 653 }
 654
 655 LTTNG_HIDDEN
 656 int mi_lttng_sessions_open(struct mi_writer *writer)
 657 {
 658         return mi_lttng_writer_open_element(writer, config_element_sessions);
 659 }
 660
 661 LTTNG_HIDDEN
 662 int mi_lttng_session(struct mi_writer *writer,
 663                 struct lttng_session *session, int is_open)
 664 {
 665         int ret;
 666
 667         assert(session);
 668
 669         /* Open sessions element */
 670         ret = mi_lttng_writer_open_element(writer,
 671                         config_element_session);
 672         if (ret) {
 673                 goto end;
 674         }
 675
 676         /* Name of the session */
 677         ret = mi_lttng_writer_write_element_string(writer,
 678                         config_element_name, session->name);
 679         if (ret) {
 680                 goto end;
 681         }
 682
 683         /* Path */
 684         ret = mi_lttng_writer_write_element_string(writer,
 685                         config_element_path, session->path);
 686         if (ret) {
 687                 goto end;
 688         }
 689
 690         /* Enabled ? */
 691         ret = mi_lttng_writer_write_element_bool(writer,
 692                         config_element_enabled, session->enabled);
 693         if (ret) {
 694                 goto end;
 695         }
 696
 697         /* Snapshot mode */
 698         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 699                         config_element_snapshot_mode, session->snapshot_mode);
 700         if (ret) {
 701                 goto end;
 702         }
 703
 704         /* Live timer interval in usec */
 705         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 706                         config_element_live_timer_interval,
 707                         session->live_timer_interval);
 708         if (ret) {
 709                 goto end;
 710         }
 711
 712         if (!is_open) {
 713                 /* Closing session element */
 714                 ret = mi_lttng_writer_close_element(writer);
 715         }
 716 end:
 717         return ret;
 718
 719 }
 720
 721 LTTNG_HIDDEN
 722 int mi_lttng_domains_open(struct mi_writer *writer)
 723 {
 724         return mi_lttng_writer_open_element(writer, config_element_domains);
 725 }
 726
 727 LTTNG_HIDDEN
 728 int mi_lttng_domain(struct mi_writer *writer,
 729                 struct lttng_domain *domain, int is_open)
 730 {
 731         int ret = 0;
 732         const char *str_domain;
 733         const char *str_buffer;
 734
 735         assert(domain);
 736
 737         /* Open domain element */
 738         ret = mi_lttng_writer_open_element(writer, config_element_domain);
 739         if (ret) {
 740                 goto end;
 741         }
 742
 743         /* Domain Type */
 744         str_domain = mi_lttng_domaintype_string(domain->type);
 745         ret = mi_lttng_writer_write_element_string(writer, config_element_type,
 746                         str_domain);
 747         if (ret) {
 748                 goto end;
 749         }
 750
 751         /* Buffer Type */
 752         str_buffer= mi_lttng_buffertype_string(domain->buf_type);
 753         ret = mi_lttng_writer_write_element_string(writer,
 754                         config_element_buffer_type, str_buffer);
 755         if (ret) {
 756                 goto end;
 757         }
 758
 759         /* TODO: union  attr
 760          * This union is not currently used and was added for
 761          * future ust domain support.
 762          * Date: 25-06-2014
 763          * */
 764
 765         if (!is_open) {
 766                 /* Closing domain element */
 767                 ret = mi_lttng_writer_close_element(writer);
 768         }
 769
 770 end:
 771         return ret;
 772
 773 }
 774
 775 LTTNG_HIDDEN
 776 int mi_lttng_channels_open(struct mi_writer *writer)
 777 {
 778         return mi_lttng_writer_open_element(writer, config_element_channels);
 779 }
 780
 781 LTTNG_HIDDEN
 782 int mi_lttng_channel(struct mi_writer *writer,
 783                 struct lttng_channel *channel, int is_open)
 784 {
 785         int ret = 0;
 786
 787         assert(channel);
 788
 789         /* Opening channel element */
 790         ret = mi_lttng_writer_open_element(writer, config_element_channel);
 791         if (ret) {
 792                 goto end;
 793         }
 794
 795         /* Name */
 796         ret = mi_lttng_writer_write_element_string(writer, config_element_name,
 797                         channel->name);
 798         if (ret) {
 799                 goto end;
 800         }
 801
 802         /* Enabled ? */
 803         ret = mi_lttng_writer_write_element_bool(writer,
 804                         config_element_enabled, channel->enabled);
 805         if (ret) {
 806                 goto end;
 807         }
 808
 809         /* Attribute */
 810         ret = mi_lttng_channel_attr(writer, &channel->attr);
 811         if (ret) {
 812                 goto end;
 813         }
 814
 815         if (!is_open) {
 816                 /* Closing channel element */
 817                 ret = mi_lttng_writer_close_element(writer);
 818                 if (ret) {
 819                         goto end;
 820                 }
 821         }
 822 end:
 823         return ret;
 824 }
 825
 826 LTTNG_HIDDEN
 827 int mi_lttng_channel_attr(struct mi_writer *writer,
 828                 struct lttng_channel_attr *attr)
 829 {
 830         int ret = 0;
 831
 832         assert(attr);
 833
 834         /* Opening Attributes */
 835         ret = mi_lttng_writer_open_element(writer, config_element_attributes);
 836         if (ret) {
 837                 goto end;
 838         }
 839
 840         /* Overwrite */
 841         ret = mi_lttng_writer_write_element_string(writer,
 842                 config_element_overwrite_mode,
 843                 attr->overwrite ? config_overwrite_mode_overwrite :
 844                         config_overwrite_mode_discard);
 845         if (ret) {
 846                 goto end;
 847         }
 848
 849         /* Sub buffer size in byte */
 850         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 851                 config_element_subbuf_size, attr->subbuf_size);
 852         if (ret) {
 853                 goto end;
 854         }
 855
 856         /* Number of subbuffer (power of two) */
 857         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 858                 config_element_num_subbuf,
 859                 attr->num_subbuf);
 860         if (ret) {
 861                 goto end;
 862         }
 863
 864         /* Switch timer interval in usec */
 865         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 866                 config_element_switch_timer_interval,
 867                 attr->switch_timer_interval);
 868         if (ret) {
 869                 goto end;
 870         }
 871
 872         /* Read timer interval in usec */
 873         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 874                 config_element_read_timer_interval,
 875                 attr->read_timer_interval);
 876         if (ret) {
 877                 goto end;
 878         }
 879
 880         /* Event output */
 881         ret = mi_lttng_writer_write_element_string(writer,
 882                 config_element_output_type,
 883                 attr->output == LTTNG_EVENT_SPLICE ?
 884                 config_output_type_splice : config_output_type_mmap);
 885         if (ret) {
 886                 goto end;
 887         }
 888
 889         /* Tracefile size in bytes */
 890         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 891                 config_element_tracefile_size, attr->tracefile_size);
 892         if (ret) {
 893                 goto end;
 894         }
 895
 896         /* Count of tracefiles */
 897         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 898                 config_element_tracefile_count,
 899                 attr->tracefile_count);
 900         if (ret) {
 901                 goto end;
 902         }
 903
 904         /* Live timer interval in usec*/
 905         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 906                 config_element_live_timer_interval,
 907                 attr->live_timer_interval);
 908         if (ret) {
 909                 goto end;
 910         }
 911
 912         /* Closing attributes */
 913         ret = mi_lttng_writer_close_element(writer);
 914         if (ret) {
 915                 goto end;
 916         }
 917 end:
 918         return ret;
 919
 920 }
 921
 922 LTTNG_HIDDEN
 923 int mi_lttng_event_common_attributes(struct mi_writer *writer,
 924                 struct lttng_event *event)
 925 {
 926         int ret;
 927
 928         /* Open event element */
 929         ret = mi_lttng_writer_open_element(writer, config_element_event);
 930         if (ret) {
 931                 goto end;
 932         }
 933
 934         /* Event name */
 935         ret = mi_lttng_writer_write_element_string(writer,
 936                         config_element_name, event->name);
 937         if (ret) {
 938                 goto end;
 939         }
 940
 941         /* Event type */
 942         ret = mi_lttng_writer_write_element_string(writer,
 943                         config_element_type, mi_lttng_eventtype_string(event->type));
 944         if (ret) {
 945                 goto end;
 946         }
 947
 948         /* Is event enabled */
 949         ret = mi_lttng_writer_write_element_bool(writer,
 950                         config_element_enabled, event->enabled);
 951         if (ret) {
 952                 goto end;
 953         }
 954
 955         /* Event filter enabled? */
 956         ret = mi_lttng_writer_write_element_bool(writer,
 957                         config_element_filter, event->filter);
 958
 959 end:
 960         return ret;
 961 }
 962
 963 LTTNG_HIDDEN
 964 int mi_lttng_event_tracepoint_loglevel(struct mi_writer *writer,
 965                 struct lttng_event *event, enum lttng_domain_type domain)
 966 {
 967         int ret;
 968
 969         /* Event loglevel */
 970         ret = mi_lttng_writer_write_element_string(writer,
 971                         config_element_loglevel,
 972                         mi_lttng_loglevel_string(event->loglevel, domain));
 973         if (ret) {
 974                 goto end;
 975         }
 976
 977         /* Log level type */
 978         ret = mi_lttng_writer_write_element_string(writer,
 979                         config_element_loglevel_type,
 980                         mi_lttng_logleveltype_string(event->loglevel_type));
 981         if (ret) {
 982                 goto end;
 983         }
 984
 985         /* event exclusion filter */
 986         ret = mi_lttng_writer_write_element_bool(writer,
 987                         config_element_exclusion, event->exclusion);
 988         if (ret) {
 989                 goto end;
 990         }
 991
 992 end:
 993         return ret;
 994 }
 995
 996 LTTNG_HIDDEN
 997 int mi_lttng_event_tracepoint_no_loglevel(struct mi_writer *writer,
 998                 struct lttng_event *event)
 999 {
1000         /* event exclusion filter */
1001         return mi_lttng_writer_write_element_bool(writer,
1002                         config_element_exclusion, event->exclusion);
1003 }
1004
1005 LTTNG_HIDDEN
1006 int mi_lttng_event_function_probe(struct mi_writer *writer,
1007                 struct lttng_event *event)
1008 {
1009         int ret;
1010
1011         ret = mi_lttng_writer_open_element(writer, config_element_attributes);
1012         if (ret) {
1013                 goto end;
1014         }
1015
1016         ret = mi_lttng_writer_open_element(writer, config_element_probe_attributes);
1017         if (ret) {
1018                 goto end;
1019         }
1020
1021         if (event->attr.probe.addr != 0) {
1022                 /* event probe address */
1023                 ret = mi_lttng_writer_write_element_unsigned_int(writer,
1024                                 config_element_address, event->attr.probe.addr);
1025                 if (ret) {
1026                         goto end;
1027                 }
1028         } else {
1029                 /* event probe offset */
1030                 ret = mi_lttng_writer_write_element_unsigned_int(writer,
1031                                 config_element_offset, event->attr.probe.offset);
1032                 if (ret) {
1033                         goto end;
1034                 }
1035
1036                 /* event probe symbol_name */
1037                 ret = mi_lttng_writer_write_element_string(writer,
1038                                 config_element_symbol_name, event->attr.probe.symbol_name);
1039                 if (ret) {
1040                         goto end;
1041                 }
1042         }
1043
1044         /* Close probe_attributes and attributes */
1045         ret = mi_lttng_close_multi_element(writer, 2);
1046 end:
1047         return ret;
1048 }
1049
1050 LTTNG_HIDDEN
1051 int mi_lttng_event_function_entry(struct mi_writer *writer,
1052                 struct lttng_event *event)
1053 {
1054         int ret;
1055
1056         ret = mi_lttng_writer_open_element(writer, config_element_attributes);
1057         if (ret) {
1058                 goto end;
1059         }
1060
1061         ret = mi_lttng_writer_open_element(writer, config_element_probe_attributes);
1062         if (ret) {
1063                 goto end;
1064         }
1065
1066         /* event probe symbol_name */
1067         ret = mi_lttng_writer_write_element_string(writer,
1068                         config_element_symbol_name, event->attr.ftrace.symbol_name);
1069         if (ret) {
1070                 goto end;
1071         }
1072
1073         /* Close function_attributes and attributes */
1074         ret = mi_lttng_close_multi_element(writer, 2);
1075 end:
1076         return ret;
1077 }
1078
1079 LTTNG_HIDDEN
1080 int mi_lttng_events_open(struct mi_writer *writer)
1081 {
1082         return mi_lttng_writer_open_element(writer, config_element_events);
1083 }
1084
1085 LTTNG_HIDDEN
1086 int mi_lttng_event(struct mi_writer *writer,
1087                 struct lttng_event *event, int is_open, enum lttng_domain_type domain)
1088 {
1089         int ret;
1090
1091         ret = mi_lttng_event_common_attributes(writer, event);
1092         if (ret) {
1093                 goto end;
1094         }
1095
1096         switch (event->type) {
1097         case LTTNG_EVENT_TRACEPOINT:
1098         {
1099                 if (event->loglevel != -1) {
1100                         ret = mi_lttng_event_tracepoint_loglevel(writer, event, domain);
1101                 } else {
1102                         ret = mi_lttng_event_tracepoint_no_loglevel(writer, event);
1103                 }
1104                 break;
1105         }
1106         case LTTNG_EVENT_FUNCTION:
1107                 /* Fallthrough */
1108         case LTTNG_EVENT_PROBE:
1109                 ret = mi_lttng_event_function_probe(writer, event);
1110                 break;
1111         case LTTNG_EVENT_FUNCTION_ENTRY:
1112                 ret = mi_lttng_event_function_entry(writer, event);
1113                 break;
1114         case LTTNG_EVENT_ALL:
1115                 /* Fallthrough */
1116         default:
1117                 break;
1118         }
1119
1120         if (!is_open) {
1121                 ret = mi_lttng_writer_close_element(writer);
1122         }
1123
1124 end:
1125         return ret;
1126 }
1127
1128 LTTNG_HIDDEN
1129 int mi_lttng_trackers_open(struct mi_writer *writer)
1130 {
1131         return mi_lttng_writer_open_element(writer, config_element_trackers);
1132 }
1133
1134 LTTNG_HIDDEN
1135 int mi_lttng_pid_tracker_open(struct mi_writer *writer)
1136 {
1137         int ret;
1138
1139         /* Open element pid_tracker */
1140         ret = mi_lttng_writer_open_element(writer, config_element_pid_tracker);
1141         if (ret) {
1142                 goto end;
1143         }
1144
1145         /* Open targets element */
1146         ret = mi_lttng_targets_open(writer);
1147 end:
1148         return ret;
1149 }
1150
1151 LTTNG_HIDDEN
1152 int mi_lttng_pids_open(struct mi_writer *writer)
1153 {
1154         return mi_lttng_writer_open_element(writer, config_element_pids);
1155 }
1156
1157 /*
1158  * TODO: move the listing of pid for user agent to process semantic on
1159  * mi api bump. The use of process element break the mi api.
1160  */
1161 LTTNG_HIDDEN
1162 int mi_lttng_pid(struct mi_writer *writer, pid_t pid , const char *name,
1163                 int is_open)
1164 {
1165         int ret;
1166
1167         /* Open pid process */
1168         ret = mi_lttng_writer_open_element(writer, config_element_pid);
1169         if (ret) {
1170                 goto end;
1171         }
1172
1173         /* Writing pid number */
1174         ret = mi_lttng_writer_write_element_signed_int(writer,
1175                         mi_lttng_element_pid_id, (int)pid);
1176         if (ret) {
1177                 goto end;
1178         }
1179
1180         /* Writing name of the process */
1181         if (name) {
1182                 ret = mi_lttng_writer_write_element_string(writer, config_element_name,
1183                                 name);
1184                 if (ret) {
1185                         goto end;
1186                 }
1187         }
1188
1189         if (!is_open) {
1190                 /* Closing Pid */
1191                 ret = mi_lttng_writer_close_element(writer);
1192         }
1193
1194 end:
1195         return ret;
1196 }
1197
1198 LTTNG_HIDDEN
1199 int mi_lttng_targets_open(struct mi_writer *writer)
1200 {
1201         return mi_lttng_writer_open_element(writer,
1202                         mi_lttng_element_track_untrack_targets);
1203 }
1204
1205 LTTNG_HIDDEN
1206 int mi_lttng_pid_target(struct mi_writer *writer, pid_t pid, int is_open)
1207 {
1208         int ret;
1209
1210         ret = mi_lttng_writer_open_element(writer,
1211                         mi_lttng_element_track_untrack_pid_target);
1212         if (ret) {
1213                 goto end;
1214         }
1215
1216         /* Writing pid number
1217          * Special case for element all on track untrack command
1218          * All pid is represented as wildcard *
1219          */
1220         if ((int) pid == -1) {
1221                 ret = mi_lttng_writer_write_element_string(writer,
1222                                 config_element_pid,
1223                                 mi_lttng_element_track_untrack_all_wildcard);
1224         } else {
1225                 ret = mi_lttng_writer_write_element_signed_int(writer,
1226                                 config_element_pid, (int) pid);
1227         }
1228         if (ret) {
1229                 goto end;
1230         }
1231
1232         if (!is_open) {
1233                 ret = mi_lttng_writer_close_element(writer);
1234                 if (ret) {
1235                         goto end;
1236                 }
1237         }
1238
1239 end:
1240         return ret;
1241 }
1242
1243 LTTNG_HIDDEN
1244 int mi_lttng_event_fields_open(struct mi_writer *writer)
1245 {
1246         return mi_lttng_writer_open_element(writer, mi_lttng_element_event_fields);
1247 }
1248
1249 LTTNG_HIDDEN
1250 int mi_lttng_event_field(struct mi_writer *writer,
1251                 struct lttng_event_field *field)
1252 {
1253         int ret;
1254
1255         if (!field->field_name[0]) {
1256                 ret = 0;
1257                 goto end;
1258         }
1259
1260         /* Open field */
1261         ret = mi_lttng_writer_open_element(writer, mi_lttng_element_event_field);
1262         if (ret) {
1263                 goto end;
1264         }
1265
1266         if (!field->field_name[0]) {
1267                 goto close;
1268         }
1269
1270         /* Name */
1271         ret = mi_lttng_writer_write_element_string(writer, config_element_name,
1272                         field->field_name);
1273         if (ret) {
1274                 goto end;
1275         }
1276
1277         /* Type */
1278         ret = mi_lttng_writer_write_element_string(writer, config_element_type,
1279                         mi_lttng_eventfieldtype_string(field->type));
1280         if (ret) {
1281                 goto end;
1282         }
1283
1284         /* nowrite  */
1285         ret = mi_lttng_writer_write_element_signed_int(writer,
1286                         mi_lttng_element_nowrite, field->nowrite);
1287         if (ret) {
1288                 goto end;
1289         }
1290
1291 close:
1292         /* Close field element */
1293         ret = mi_lttng_writer_close_element(writer);
1294
1295 end:
1296         return ret;
1297 }
1298
1299 LTTNG_HIDDEN
1300 int mi_lttng_calibrate(struct mi_writer *writer,
1301                 struct lttng_calibrate *calibrate)
1302 {
1303         int ret;
1304
1305         /* Open calibrate element */
1306         ret = mi_lttng_writer_open_element(writer, mi_lttng_element_calibrate);
1307         if (ret) {
1308                 goto end;
1309         }
1310
1311         /* Calibration type */
1312         ret = mi_lttng_writer_write_element_string(writer, config_element_type,
1313                         mi_lttng_calibratetype_string(calibrate->type));
1314         if (ret) {
1315                 goto end;
1316         }
1317
1318         /* Closing calibrate element */
1319         ret = mi_lttng_writer_close_element(writer);
1320 end:
1321         return ret;
1322 }
1323
1324 LTTNG_HIDDEN
1325 int mi_lttng_context(struct mi_writer *writer,
1326                 struct lttng_event_context *context, int is_open)
1327 {
1328         int ret;
1329         const char *type_string;
1330         struct lttng_event_perf_counter_ctx *perf_context;
1331         /* Open context */
1332         ret = mi_lttng_writer_open_element(writer , config_element_context);
1333         if (ret) {
1334                 goto end;
1335         }
1336
1337         type_string = mi_lttng_event_contexttype_string(context->ctx);
1338         if (!type_string) {
1339                 ret = -LTTNG_ERR_INVALID;
1340                 goto end;
1341         }
1342
1343         /* Print context type */
1344         ret = mi_lttng_writer_write_element_string(writer, config_element_type,
1345                         type_string);
1346
1347         /* Special case for PERF_*_COUNTER
1348          * print the lttng_event_perf_counter_ctx*/
1349         switch (context->ctx) {
1350         case LTTNG_EVENT_CONTEXT_PERF_COUNTER:
1351         case LTTNG_EVENT_CONTEXT_PERF_THREAD_COUNTER:
1352         case LTTNG_EVENT_CONTEXT_PERF_CPU_COUNTER:
1353                 perf_context = &context->u.perf_counter;
1354                 ret =  mi_lttng_perf_counter_context(writer, perf_context);
1355                 if (ret) {
1356                         goto end;
1357                 }
1358                 break;
1359         default:
1360                 break;
1361         }
1362
1363         /* Close context */
1364         if (!is_open) {
1365                 ret = mi_lttng_writer_close_element(writer);
1366         }
1367
1368 end:
1369         return ret;
1370 }
1371
1372 LTTNG_HIDDEN
1373 int mi_lttng_perf_counter_context(struct mi_writer *writer,
1374                 struct lttng_event_perf_counter_ctx  *perf_context)
1375 {
1376         int ret;
1377
1378         /* Open perf_counter_context */
1379         ret = mi_lttng_writer_open_element(writer,
1380                         mi_lttng_element_perf_counter_context);
1381         if (ret) {
1382                 goto end;
1383         }
1384
1385         /* Type */
1386         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1387                         config_element_type, perf_context->type);
1388         if (ret) {
1389                 goto end;
1390         }
1391
1392         /* Config */
1393         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1394                         config_element_config, perf_context->config);
1395         if (ret) {
1396                 goto end;
1397         }
1398
1399         /* Name of the perf counter */
1400         ret = mi_lttng_writer_write_element_string(writer,
1401                         config_element_name, perf_context->name);
1402         if (ret) {
1403                 goto end;
1404         }
1405
1406         /* Close perf_counter_context */
1407         ret = mi_lttng_writer_close_element(writer);
1408 end:
1409         return ret;
1410 }
1411
1412 LTTNG_HIDDEN
1413 int mi_lttng_snapshot_output_session_name(struct mi_writer *writer,
1414                 const char *session_name)
1415 {
1416         int ret;
1417
1418         /* Open session element */
1419         ret = mi_lttng_writer_open_element(writer, config_element_session);
1420         if (ret) {
1421                 goto end;
1422         }
1423
1424         /* Snapshot output list for current session name */
1425         ret = mi_lttng_writer_write_element_string(writer, config_element_name,
1426                         session_name);
1427         if (ret) {
1428                 goto end;
1429         }
1430
1431         /* Open element snapshots (sequence one snapshot) */
1432         ret = mi_lttng_writer_open_element(writer, mi_lttng_element_snapshots);
1433         if (ret) {
1434                 goto end;
1435         }
1436
1437 end:
1438         return ret;
1439 }
1440
1441 LTTNG_HIDDEN
1442 int mi_lttng_snapshot_list_output(struct mi_writer *writer,
1443                 struct lttng_snapshot_output *output)
1444 {
1445         int ret;
1446
1447         /* Open element snapshot output */
1448         ret = mi_lttng_writer_open_element(writer,
1449                         mi_lttng_element_command_snapshot);
1450         if (ret) {
1451                 goto end;
1452         }
1453
1454         /* ID of the snapshot output */
1455         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1456                         mi_lttng_element_id, output->id);
1457         if (ret) {
1458                 goto end;
1459         }
1460
1461         /* Name of the output */
1462         ret = mi_lttng_writer_write_element_string(writer, config_element_name,
1463                         output->name);
1464         if (ret) {
1465                 goto end;
1466         }
1467
1468         /* Destination of the output (ctrl_url)*/
1469         ret = mi_lttng_writer_write_element_string(writer,
1470                         mi_lttng_element_snapshot_ctrl_url, output->ctrl_url);
1471         if (ret) {
1472                 goto end;
1473         }
1474
1475         /* Destination of the output (data_url) */
1476         ret = mi_lttng_writer_write_element_string(writer,
1477                         mi_lttng_element_snapshot_data_url, output->data_url);
1478         if (ret) {
1479                 goto end;
1480         }
1481
1482         /* total size of all stream combined */
1483         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1484                         mi_lttng_element_snapshot_max_size, output->max_size);
1485         if (ret) {
1486                 goto end;
1487         }
1488
1489         /* Close snapshot output element */
1490         ret = mi_lttng_writer_close_element(writer);
1491
1492 end:
1493         return ret;
1494 }
1495
1496 LTTNG_HIDDEN
1497 int mi_lttng_snapshot_del_output(struct mi_writer *writer, int id,
1498                 const char *name, const char *current_session_name)
1499 {
1500         int ret;
1501
1502         /* Open element del_snapshot */
1503         ret = mi_lttng_writer_open_element(writer,
1504                         mi_lttng_element_command_snapshot);
1505         if (ret) {
1506                 goto end;
1507         }
1508
1509
1510         if (id != UINT32_MAX) {
1511                 /* "Snapshot output "id" successfully deleted
1512                  * for "current_session_name"
1513                  * ID of the snapshot output
1514                  */
1515                 ret = mi_lttng_writer_write_element_unsigned_int(writer,
1516                                 mi_lttng_element_id, id);
1517                 if (ret) {
1518                         goto end;
1519                 }
1520         } else {
1521                 /* "Snapshot output "name" successfully deleted
1522                  * for session "current_session_name"
1523                  * Name of the output
1524                  */
1525                 ret = mi_lttng_writer_write_element_string(writer, config_element_name,
1526                                 name);
1527                 if (ret) {
1528                         goto end;
1529                 }
1530         }
1531
1532         /* Snapshot was deleted for session "current_session_name"*/
1533         ret = mi_lttng_writer_write_element_string(writer,
1534                         mi_lttng_element_snapshot_session_name,
1535                         current_session_name);
1536         if (ret) {
1537                 goto end;
1538         }
1539
1540         /* Close snapshot element */
1541         ret = mi_lttng_writer_close_element(writer);
1542
1543 end:
1544         return ret;
1545 }
1546
1547 LTTNG_HIDDEN
1548 int mi_lttng_snapshot_add_output(struct mi_writer *writer,
1549                 const char *current_session_name, const char *n_ptr,
1550                 struct lttng_snapshot_output *output)
1551 {
1552         int ret;
1553
1554         /* Open element snapshot */
1555         ret = mi_lttng_writer_open_element(writer,
1556                         mi_lttng_element_command_snapshot);
1557         if (ret) {
1558                 goto end;
1559         }
1560
1561         /* Snapshot output id */
1562         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1563                         mi_lttng_element_id, output->id);
1564         if (ret) {
1565                 goto end;
1566         }
1567
1568         /* Snapshot output names */
1569         ret = mi_lttng_writer_write_element_string(writer,
1570                         config_element_name, n_ptr);
1571         if (ret) {
1572                 goto end;
1573         }
1574
1575         /* Destination of the output (ctrl_url)*/
1576         ret = mi_lttng_writer_write_element_string(writer,
1577                         mi_lttng_element_snapshot_ctrl_url, output->ctrl_url);
1578         if (ret) {
1579                 goto end;
1580         }
1581
1582         /* Snapshot added for session "current_session_name"*/
1583         ret = mi_lttng_writer_write_element_string(writer,
1584                         mi_lttng_element_snapshot_session_name, current_session_name);
1585         if (ret) {
1586                 goto end;
1587         }
1588
1589         /* total size of all stream combined */
1590         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1591                         mi_lttng_element_snapshot_max_size, output->max_size);
1592         if (ret) {
1593                 goto end;
1594         }
1595
1596         /* Close snapshot element */
1597         ret = mi_lttng_writer_close_element(writer);
1598
1599 end:
1600         return ret;
1601 }
1602
1603 LTTNG_HIDDEN
1604 int mi_lttng_snapshot_record(struct mi_writer *writer,
1605                 const char *current_session_name, const char *url,
1606                 const char *cmdline_ctrl_url, const char *cmdline_data_url)
1607 {
1608         int ret;
1609
1610         /* Open element snapshot */
1611         ret = mi_lttng_writer_open_element(writer,
1612                         mi_lttng_element_command_snapshot);
1613         if (ret) {
1614                 goto end;
1615         }
1616
1617         /*
1618          * If a valid an URL was given, serialize it,
1619          * else take the command line data and ctrl urls*/
1620         if (url) {
1621                 /* Destination of the output (ctrl_url)*/
1622                 ret = mi_lttng_writer_write_element_string(writer,
1623                                 mi_lttng_element_snapshot_ctrl_url, url);
1624                 if (ret) {
1625                         goto end;
1626                 }
1627         } else if (cmdline_ctrl_url) {
1628                 /* Destination of the output (ctrl_url)*/
1629                 ret = mi_lttng_writer_write_element_string(writer,
1630                                 mi_lttng_element_snapshot_ctrl_url, cmdline_ctrl_url);
1631                 if (ret) {
1632                         goto end;
1633                 }
1634
1635                 /* Destination of the output (data_url) */
1636                 ret = mi_lttng_writer_write_element_string(writer,
1637                                 mi_lttng_element_snapshot_data_url, cmdline_data_url);
1638                 if (ret) {
1639                         goto end;
1640                 }
1641         }
1642
1643         /* Close record_snapshot element */
1644         ret = mi_lttng_writer_close_element(writer);
1645
1646 end:
1647         return ret;
1648 }