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  * Copyright (C) 2016 - Jérémie Galarneau <jeremie.galarneau@efficios.com>
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License, version 2 only, as
   8  * published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
  13  * more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along with
  16  * this program; if not, write to the Free Software Foundation, Inc., 51
  17  * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18  */
  19
  20 #define _LGPL_SOURCE
  21 #include <common/config/session-config.h>
  22 #include <common/defaults.h>
  23 #include <lttng/snapshot-internal.h>
  24 #include <lttng/tracker-internal.h>
  25 #include <lttng/channel.h>
  26 #include "mi-lttng.h"
  27
  28 #include <assert.h>
  29
  30 #define MI_SCHEMA_MAJOR_VERSION 3
  31 #define MI_SCHEMA_MINOR_VERSION 0
  32
  33 /* Machine interface namespace URI */
  34 LTTNG_HIDDEN const char * const mi_lttng_xmlns = "xmlns";
  35 LTTNG_HIDDEN const char * const mi_lttng_xmlns_xsi = "xmlns:xsi";
  36 LTTNG_HIDDEN const char * const mi_lttng_w3_schema_uri = "http://www.w3.org/2001/XMLSchema-instance";
  37 LTTNG_HIDDEN const char * const mi_lttng_schema_location = "xsi:schemaLocation";
  38 LTTNG_HIDDEN const char * const mi_lttng_schema_location_uri =
  39         DEFAULT_LTTNG_MI_NAMESPACE " "
  40         "https://lttng.org/xml/schemas/lttng-mi/" XSTR(MI_SCHEMA_MAJOR_VERSION)
  41         "/lttng-mi-" XSTR(MI_SCHEMA_MAJOR_VERSION) "."
  42         XSTR(MI_SCHEMA_MINOR_VERSION) ".xsd";
  43 LTTNG_HIDDEN const char * const mi_lttng_schema_version = "schemaVersion";
  44 LTTNG_HIDDEN const char * const mi_lttng_schema_version_value = XSTR(MI_SCHEMA_MAJOR_VERSION)
  45         "." XSTR(MI_SCHEMA_MINOR_VERSION);
  46
  47 /* Strings related to command */
  48 const char * const mi_lttng_element_command = "command";
  49 const char * const mi_lttng_element_command_action = "snapshot_action";
  50 const char * const mi_lttng_element_command_add_context = "add-context";
  51 const char * const mi_lttng_element_command_create = "create";
  52 const char * const mi_lttng_element_command_destroy = "destroy";
  53 const char * const mi_lttng_element_command_disable_channel = "disable-channel";
  54 const char * const mi_lttng_element_command_disable_event = "disable-event";
  55 const char * const mi_lttng_element_command_enable_channels = "enable-channel";
  56 const char * const mi_lttng_element_command_enable_event = "enable-event";
  57 const char * const mi_lttng_element_command_list = "list";
  58 const char * const mi_lttng_element_command_load = "load";
  59 LTTNG_HIDDEN const char * const mi_lttng_element_command_metadata = "metadata";
  60 LTTNG_HIDDEN const char * const mi_lttng_element_command_metadata_action = "metadata_action";
  61 LTTNG_HIDDEN const char * const mi_lttng_element_command_regenerate = "regenerate";
  62 LTTNG_HIDDEN const char * const mi_lttng_element_command_regenerate_action = "regenerate_action";
  63 const char * const mi_lttng_element_command_name = "name";
  64 const char * const mi_lttng_element_command_output = "output";
  65 const char * const mi_lttng_element_command_save = "save";
  66 const char * const mi_lttng_element_command_set_session = "set-session";
  67 const char * const mi_lttng_element_command_snapshot = "snapshot";
  68 const char * const mi_lttng_element_command_snapshot_add = "add_snapshot";
  69 const char * const mi_lttng_element_command_snapshot_del = "del_snapshot";
  70 const char * const mi_lttng_element_command_snapshot_list = "list_snapshot";
  71 const char * const mi_lttng_element_command_snapshot_record = "record_snapshot";
  72 const char * const mi_lttng_element_command_start = "start";
  73 const char * const mi_lttng_element_command_stop = "stop";
  74 const char * const mi_lttng_element_command_success = "success";
  75 const char * const mi_lttng_element_command_track = "track";
  76 const char * const mi_lttng_element_command_untrack = "untrack";
  77 const char * const mi_lttng_element_command_version = "version";
  78 LTTNG_HIDDEN const char * const mi_lttng_element_command_rotate = "rotate";
  79 LTTNG_HIDDEN const char * const mi_lttng_element_command_enable_rotation = "enable-rotation";
  80 LTTNG_HIDDEN const char * const mi_lttng_element_command_disable_rotation = "disable-rotation";
  81 LTTNG_HIDDEN const char * const mi_lttng_element_command_clear = "clear";
  82
  83 /* Strings related to version command */
  84 const char * const mi_lttng_element_version = "version";
  85 const char * const mi_lttng_element_version_commit = "commit";
  86 const char * const mi_lttng_element_version_description = "description";
  87 const char * const mi_lttng_element_version_license = "license";
  88 const char * const mi_lttng_element_version_major = "major";
  89 const char * const mi_lttng_element_version_minor = "minor";
  90 const char * const mi_lttng_element_version_patch_level = "patchLevel";
  91 const char * const mi_lttng_element_version_str = "string";
  92 const char * const mi_lttng_element_version_web = "url";
  93
  94 /* String related to a lttng_event_field */
  95 const char * const mi_lttng_element_event_field = "event_field";
  96 const char * const mi_lttng_element_event_fields = "event_fields";
  97
  98 /* String related to lttng_event_perf_counter_ctx */
  99 const char * const mi_lttng_element_perf_counter_context = "perf";
 100
 101 /* Strings related to pid */
 102 const char * const mi_lttng_element_pid_id = "id";
 103
 104 /* Strings related to save command */
 105 const char * const mi_lttng_element_save = "save";
 106
 107 /* Strings related to load command */
 108 const char * const mi_lttng_element_load = "load";
 109 LTTNG_HIDDEN const char * const mi_lttng_element_load_overrides = "overrides";
 110 LTTNG_HIDDEN const char * const mi_lttng_element_load_override_url = "url";
 111
 112 /* General elements of mi_lttng */
 113 const char * const mi_lttng_element_empty = "";
 114 const char * const mi_lttng_element_id = "id";
 115 const char * const mi_lttng_element_nowrite = "nowrite";
 116 const char * const mi_lttng_element_success = "success";
 117 const char * const mi_lttng_element_type_enum = "ENUM";
 118 const char * const mi_lttng_element_type_float = "FLOAT";
 119 const char * const mi_lttng_element_type_integer = "INTEGER";
 120 const char * const mi_lttng_element_type_other = "OTHER";
 121 const char * const mi_lttng_element_type_string = "STRING";
 122
 123 /* String related to loglevel */
 124 const char * const mi_lttng_loglevel_str_alert = "TRACE_ALERT";
 125 const char * const mi_lttng_loglevel_str_crit = "TRACE_CRIT";
 126 const char * const mi_lttng_loglevel_str_debug = "TRACE_DEBUG";
 127 const char * const mi_lttng_loglevel_str_debug_function = "TRACE_DEBUG_FUNCTION";
 128 const char * const mi_lttng_loglevel_str_debug_line = "TRACE_DEBUG_LINE";
 129 const char * const mi_lttng_loglevel_str_debug_module = "TRACE_DEBUG_MODULE";
 130 const char * const mi_lttng_loglevel_str_debug_process = "TRACE_DEBUG_PROCESS";
 131 const char * const mi_lttng_loglevel_str_debug_program = "TRACE_DEBUG_PROGRAM";
 132 const char * const mi_lttng_loglevel_str_debug_system = "TRACE_DEBUG_SYSTEM";
 133 const char * const mi_lttng_loglevel_str_debug_unit = "TRACE_DEBUG_UNIT";
 134 const char * const mi_lttng_loglevel_str_emerg = "TRACE_EMERG";
 135 const char * const mi_lttng_loglevel_str_err = "TRACE_ERR";
 136 const char * const mi_lttng_loglevel_str_info = "TRACE_INFO";
 137 const char * const mi_lttng_loglevel_str_notice = "TRACE_NOTICE";
 138 const char * const mi_lttng_loglevel_str_unknown = "UNKNOWN";
 139 const char * const mi_lttng_loglevel_str_warning = "TRACE_WARNING";
 140
 141 /* String related to loglevel JUL */
 142 const char * const mi_lttng_loglevel_str_jul_all = "JUL_ALL";
 143 const char * const mi_lttng_loglevel_str_jul_config = "JUL_CONFIG";
 144 const char * const mi_lttng_loglevel_str_jul_fine = "JUL_FINE";
 145 const char * const mi_lttng_loglevel_str_jul_finer = "JUL_FINER";
 146 const char * const mi_lttng_loglevel_str_jul_finest = "JUL_FINEST";
 147 const char * const mi_lttng_loglevel_str_jul_info = "JUL_INFO";
 148 const char * const mi_lttng_loglevel_str_jul_off = "JUL_OFF";
 149 const char * const mi_lttng_loglevel_str_jul_severe = "JUL_SEVERE";
 150 const char * const mi_lttng_loglevel_str_jul_warning = "JUL_WARNING";
 151
 152 /* String related to loglevel LOG4J */
 153 const char * const mi_lttng_loglevel_str_log4j_off = "LOG4J_OFF";
 154 const char * const mi_lttng_loglevel_str_log4j_fatal = "LOG4J_FATAL";
 155 const char * const mi_lttng_loglevel_str_log4j_error = "LOG4J_ERROR";
 156 const char * const mi_lttng_loglevel_str_log4j_warn = "LOG4J_WARN";
 157 const char * const mi_lttng_loglevel_str_log4j_info = "LOG4J_INFO";
 158 const char * const mi_lttng_loglevel_str_log4j_debug = "LOG4J_DEBUG";
 159 const char * const mi_lttng_loglevel_str_log4j_trace = "LOG4J_TRACE";
 160 const char * const mi_lttng_loglevel_str_log4j_all = "LOG4J_ALL";
 161
 162 /* String related to loglevel Python */
 163 const char * const mi_lttng_loglevel_str_python_critical = "PYTHON_CRITICAL";
 164 const char * const mi_lttng_loglevel_str_python_error = "PYTHON_ERROR";
 165 const char * const mi_lttng_loglevel_str_python_warning = "PYTHON_WARNING";
 166 const char * const mi_lttng_loglevel_str_python_info = "PYTHON_INFO";
 167 const char * const mi_lttng_loglevel_str_python_debug = "PYTHON_DEBUG";
 168 const char * const mi_lttng_loglevel_str_python_notset = "PYTHON_NOTSET";
 169
 170 /* String related to loglevel type */
 171 const char * const mi_lttng_loglevel_type_all = "ALL";
 172 const char * const mi_lttng_loglevel_type_range = "RANGE";
 173 const char * const mi_lttng_loglevel_type_single = "SINGLE";
 174 const char * const mi_lttng_loglevel_type_unknown = "UNKNOWN";
 175
 176 /* String related to a lttng_snapshot_output */
 177 const char * const mi_lttng_element_snapshot_ctrl_url = "ctrl_url";
 178 const char * const mi_lttng_element_snapshot_data_url = "data_url";
 179 const char * const mi_lttng_element_snapshot_max_size = "max_size";
 180 const char * const mi_lttng_element_snapshot_n_ptr = "n_ptr";
 181 const char * const mi_lttng_element_snapshot_session_name = "session_name";
 182 const char * const mi_lttng_element_snapshots = "snapshots";
 183
 184 /* String related to track/untrack command */
 185 const char * const mi_lttng_element_track_untrack_all_wildcard = "*";
 186
 187 LTTNG_HIDDEN const char * const mi_lttng_element_session_name = "session_name";
 188
 189 /* String related to rotate command */
 190 LTTNG_HIDDEN const char * const mi_lttng_element_rotation = "rotation";
 191 LTTNG_HIDDEN const char * const mi_lttng_element_rotate_status = "status";
 192 LTTNG_HIDDEN const char * const mi_lttng_element_rotation_schedule = "rotation_schedule";
 193 LTTNG_HIDDEN const char * const mi_lttng_element_rotation_schedules = "rotation_schedules";
 194 LTTNG_HIDDEN const char * const mi_lttng_element_rotation_schedule_result = "rotation_schedule_result";
 195 LTTNG_HIDDEN const char * const mi_lttng_element_rotation_schedule_results = "rotation_schedule_results";
 196 LTTNG_HIDDEN const char * const mi_lttng_element_rotation_schedule_periodic = "periodic";
 197 LTTNG_HIDDEN const char * const mi_lttng_element_rotation_schedule_periodic_time_us = "time_us";
 198 LTTNG_HIDDEN const char * const mi_lttng_element_rotation_schedule_size_threshold = "size_threshold";
 199 LTTNG_HIDDEN const char * const mi_lttng_element_rotation_schedule_size_threshold_bytes = "bytes";
 200 LTTNG_HIDDEN const char * const mi_lttng_element_rotation_state = "state";
 201 LTTNG_HIDDEN const char * const mi_lttng_element_rotation_location = "location";
 202 LTTNG_HIDDEN const char * const mi_lttng_element_rotation_location_local = "local";
 203 LTTNG_HIDDEN const char * const mi_lttng_element_rotation_location_local_absolute_path = "absolute_path";
 204 LTTNG_HIDDEN const char * const mi_lttng_element_rotation_location_relay = "relay";
 205 LTTNG_HIDDEN const char * const mi_lttng_element_rotation_location_relay_host = "host";
 206 LTTNG_HIDDEN const char * const mi_lttng_element_rotation_location_relay_control_port = "control_port";
 207 LTTNG_HIDDEN const char * const mi_lttng_element_rotation_location_relay_data_port = "data_port";
 208 LTTNG_HIDDEN const char * const mi_lttng_element_rotation_location_relay_protocol = "protocol";
 209 LTTNG_HIDDEN const char * const mi_lttng_element_rotation_location_relay_relative_path = "relative_path";
 210
 211 /* String related to enum lttng_rotation_state */
 212 LTTNG_HIDDEN const char * const mi_lttng_rotation_state_str_ongoing = "ONGOING";
 213 LTTNG_HIDDEN const char * const mi_lttng_rotation_state_str_completed = "COMPLETED";
 214 LTTNG_HIDDEN const char * const mi_lttng_rotation_state_str_expired = "EXPIRED";
 215 LTTNG_HIDDEN const char * const mi_lttng_rotation_state_str_error = "ERROR";
 216
 217 /* String related to enum lttng_trace_archive_location_relay_protocol_type */
 218 LTTNG_HIDDEN const char * const mi_lttng_rotation_location_relay_protocol_str_tcp = "TCP";
 219
 220 /* String related to add-context command */
 221 LTTNG_HIDDEN const char * const mi_lttng_element_context_symbol = "symbol";
 222
 223 /* Deprecated symbols preserved for ABI compatibility. */
 224 const char * const mi_lttng_context_type_perf_counter;
 225 const char * const mi_lttng_context_type_perf_cpu_counter;
 226 const char * const mi_lttng_context_type_perf_thread_counter;
 227 const char * const mi_lttng_element_track_untrack_pid_target;
 228 const char * const mi_lttng_element_track_untrack_targets;
 229 const char * const mi_lttng_element_calibrate;
 230 const char * const mi_lttng_element_calibrate_function;
 231 const char * const mi_lttng_element_command_calibrate;
 232
 233 /* This is a merge of jul loglevel and regular loglevel
 234  * Those should never overlap by definition
 235  * (see struct lttng_event loglevel)
 236  */
 237 LTTNG_HIDDEN
 238 const char *mi_lttng_loglevel_string(int value, enum lttng_domain_type domain)
 239 {
 240         switch (domain) {
 241         case LTTNG_DOMAIN_KERNEL:
 242         case LTTNG_DOMAIN_UST:
 243                 switch (value) {
 244                 case -1:
 245                         return mi_lttng_element_empty;
 246                 case LTTNG_LOGLEVEL_EMERG:
 247                         return mi_lttng_loglevel_str_emerg;
 248                 case LTTNG_LOGLEVEL_ALERT:
 249                         return mi_lttng_loglevel_str_alert;
 250                 case LTTNG_LOGLEVEL_CRIT:
 251                         return mi_lttng_loglevel_str_crit;
 252                 case LTTNG_LOGLEVEL_ERR:
 253                         return mi_lttng_loglevel_str_err;
 254                 case LTTNG_LOGLEVEL_WARNING:
 255                         return mi_lttng_loglevel_str_warning;
 256                 case LTTNG_LOGLEVEL_NOTICE:
 257                         return mi_lttng_loglevel_str_notice;
 258                 case LTTNG_LOGLEVEL_INFO:
 259                         return mi_lttng_loglevel_str_info;
 260                 case LTTNG_LOGLEVEL_DEBUG_SYSTEM:
 261                         return mi_lttng_loglevel_str_debug_system;
 262                 case LTTNG_LOGLEVEL_DEBUG_PROGRAM:
 263                         return mi_lttng_loglevel_str_debug_program;
 264                 case LTTNG_LOGLEVEL_DEBUG_PROCESS:
 265                         return mi_lttng_loglevel_str_debug_process;
 266                 case LTTNG_LOGLEVEL_DEBUG_MODULE:
 267                         return mi_lttng_loglevel_str_debug_module;
 268                 case LTTNG_LOGLEVEL_DEBUG_UNIT:
 269                         return mi_lttng_loglevel_str_debug_unit;
 270                 case LTTNG_LOGLEVEL_DEBUG_FUNCTION:
 271                         return mi_lttng_loglevel_str_debug_function;
 272                 case LTTNG_LOGLEVEL_DEBUG_LINE:
 273                         return mi_lttng_loglevel_str_debug_line;
 274                 case LTTNG_LOGLEVEL_DEBUG:
 275                         return mi_lttng_loglevel_str_debug;
 276                 default:
 277                         return mi_lttng_loglevel_str_unknown;
 278                 }
 279                 break;
 280         case LTTNG_DOMAIN_LOG4J:
 281                 switch (value) {
 282                 case -1:
 283                         return mi_lttng_element_empty;
 284                 case LTTNG_LOGLEVEL_LOG4J_OFF:
 285                         return mi_lttng_loglevel_str_log4j_off;
 286                 case LTTNG_LOGLEVEL_LOG4J_FATAL:
 287                         return mi_lttng_loglevel_str_log4j_fatal;
 288                 case LTTNG_LOGLEVEL_LOG4J_ERROR:
 289                         return mi_lttng_loglevel_str_log4j_error;
 290                 case LTTNG_LOGLEVEL_LOG4J_WARN:
 291                         return mi_lttng_loglevel_str_log4j_warn;
 292                 case LTTNG_LOGLEVEL_LOG4J_INFO:
 293                         return mi_lttng_loglevel_str_log4j_info;
 294                 case LTTNG_LOGLEVEL_LOG4J_DEBUG:
 295                         return mi_lttng_loglevel_str_log4j_debug;
 296                 case LTTNG_LOGLEVEL_LOG4J_TRACE:
 297                         return mi_lttng_loglevel_str_log4j_trace;
 298                 case LTTNG_LOGLEVEL_LOG4J_ALL:
 299                         return mi_lttng_loglevel_str_log4j_all;
 300                 default:
 301                         return mi_lttng_loglevel_str_unknown;
 302                 }
 303                 break;
 304         case LTTNG_DOMAIN_JUL:
 305                 switch (value) {
 306                 case -1:
 307                         return mi_lttng_element_empty;
 308                 case LTTNG_LOGLEVEL_JUL_OFF:
 309                         return mi_lttng_loglevel_str_jul_off;
 310                 case LTTNG_LOGLEVEL_JUL_SEVERE:
 311                         return mi_lttng_loglevel_str_jul_severe;
 312                 case LTTNG_LOGLEVEL_JUL_WARNING:
 313                         return mi_lttng_loglevel_str_jul_warning;
 314                 case LTTNG_LOGLEVEL_JUL_INFO:
 315                         return mi_lttng_loglevel_str_jul_info;
 316                 case LTTNG_LOGLEVEL_JUL_CONFIG:
 317                         return mi_lttng_loglevel_str_jul_config;
 318                 case LTTNG_LOGLEVEL_JUL_FINE:
 319                         return mi_lttng_loglevel_str_jul_fine;
 320                 case LTTNG_LOGLEVEL_JUL_FINER:
 321                         return mi_lttng_loglevel_str_jul_finer;
 322                 case LTTNG_LOGLEVEL_JUL_FINEST:
 323                         return mi_lttng_loglevel_str_jul_finest;
 324                 case LTTNG_LOGLEVEL_JUL_ALL:
 325                         return mi_lttng_loglevel_str_jul_all;
 326                 default:
 327                         return mi_lttng_loglevel_str_unknown;
 328                 }
 329                 break;
 330         case LTTNG_DOMAIN_PYTHON:
 331                 switch (value) {
 332                 case LTTNG_LOGLEVEL_PYTHON_CRITICAL:
 333                         return mi_lttng_loglevel_str_python_critical;
 334                 case LTTNG_LOGLEVEL_PYTHON_ERROR:
 335                         return mi_lttng_loglevel_str_python_error;
 336                 case LTTNG_LOGLEVEL_PYTHON_WARNING:
 337                         return mi_lttng_loglevel_str_python_warning;
 338                 case LTTNG_LOGLEVEL_PYTHON_INFO:
 339                         return mi_lttng_loglevel_str_python_info;
 340                 case LTTNG_LOGLEVEL_PYTHON_DEBUG:
 341                         return mi_lttng_loglevel_str_python_debug;
 342                 case LTTNG_LOGLEVEL_PYTHON_NOTSET:
 343                         return mi_lttng_loglevel_str_python_notset;
 344                 default:
 345                         return mi_lttng_loglevel_str_unknown;
 346                 }
 347                 break;
 348         default:
 349                 return mi_lttng_loglevel_str_unknown;
 350         }
 351 }
 352
 353 LTTNG_HIDDEN
 354 const char *mi_lttng_logleveltype_string(enum lttng_loglevel_type value)
 355 {
 356         switch (value) {
 357         case LTTNG_EVENT_LOGLEVEL_ALL:
 358                 return mi_lttng_loglevel_type_all;
 359         case LTTNG_EVENT_LOGLEVEL_RANGE:
 360                 return mi_lttng_loglevel_type_range;
 361         case LTTNG_EVENT_LOGLEVEL_SINGLE:
 362                 return mi_lttng_loglevel_type_single;
 363         default:
 364                 return mi_lttng_loglevel_type_unknown;
 365         }
 366 }
 367
 368 static
 369 const char *mi_lttng_eventtype_string(enum lttng_event_type value)
 370 {
 371         switch (value) {
 372         case LTTNG_EVENT_ALL:
 373                 return config_event_type_all;
 374         case LTTNG_EVENT_TRACEPOINT:
 375                 return config_event_type_tracepoint;
 376         case LTTNG_EVENT_PROBE:
 377                 return config_event_type_probe;
 378         case LTTNG_EVENT_USERSPACE_PROBE:
 379                 return config_event_type_userspace_probe;
 380         case LTTNG_EVENT_FUNCTION:
 381                 return config_event_type_function;
 382         case LTTNG_EVENT_FUNCTION_ENTRY:
 383                 return config_event_type_function_entry;
 384         case LTTNG_EVENT_SYSCALL:
 385                 return config_event_type_syscall;
 386         case LTTNG_EVENT_NOOP:
 387                 return config_event_type_noop;
 388         default:
 389                 return mi_lttng_element_empty;
 390         }
 391 }
 392
 393 static
 394 const char *mi_lttng_event_contexttype_string(enum lttng_event_context_type val)
 395 {
 396         switch (val) {
 397         case LTTNG_EVENT_CONTEXT_PID:
 398                 return config_event_context_pid;
 399         case LTTNG_EVENT_CONTEXT_PROCNAME:
 400                 return config_event_context_procname;
 401         case LTTNG_EVENT_CONTEXT_PRIO:
 402                 return config_event_context_prio;
 403         case LTTNG_EVENT_CONTEXT_NICE:
 404                 return config_event_context_nice;
 405         case LTTNG_EVENT_CONTEXT_VPID:
 406                 return config_event_context_vpid;
 407         case LTTNG_EVENT_CONTEXT_TID:
 408                 return config_event_context_tid;
 409         case LTTNG_EVENT_CONTEXT_VTID:
 410                 return config_event_context_vtid;
 411         case LTTNG_EVENT_CONTEXT_PPID:
 412                 return config_event_context_ppid;
 413         case LTTNG_EVENT_CONTEXT_VPPID:
 414                 return config_event_context_vppid;
 415         case LTTNG_EVENT_CONTEXT_PTHREAD_ID:
 416                 return config_event_context_pthread_id;
 417         case LTTNG_EVENT_CONTEXT_HOSTNAME:
 418                 return config_event_context_hostname;
 419         case LTTNG_EVENT_CONTEXT_IP:
 420                 return config_event_context_ip;
 421         case LTTNG_EVENT_CONTEXT_INTERRUPTIBLE:
 422                 return config_event_context_interruptible;
 423         case LTTNG_EVENT_CONTEXT_PREEMPTIBLE:
 424                 return config_event_context_preemptible;
 425         case LTTNG_EVENT_CONTEXT_NEED_RESCHEDULE:
 426                 return config_event_context_need_reschedule;
 427         case LTTNG_EVENT_CONTEXT_MIGRATABLE:
 428                 return config_event_context_migratable;
 429         case LTTNG_EVENT_CONTEXT_CALLSTACK_USER:
 430                 return config_event_context_callstack_user;
 431         case LTTNG_EVENT_CONTEXT_CALLSTACK_KERNEL:
 432                 return config_event_context_callstack_kernel;
 433         case LTTNG_EVENT_CONTEXT_CGROUP_NS:
 434                 return config_event_context_cgroup_ns;
 435         case LTTNG_EVENT_CONTEXT_IPC_NS:
 436                 return config_event_context_ipc_ns;
 437         case LTTNG_EVENT_CONTEXT_MNT_NS:
 438                 return config_event_context_mnt_ns;
 439         case LTTNG_EVENT_CONTEXT_NET_NS:
 440                 return config_event_context_net_ns;
 441         case LTTNG_EVENT_CONTEXT_PID_NS:
 442                 return config_event_context_pid_ns;
 443         case LTTNG_EVENT_CONTEXT_USER_NS:
 444                 return config_event_context_user_ns;
 445         case LTTNG_EVENT_CONTEXT_UTS_NS:
 446                 return config_event_context_uts_ns;
 447         case LTTNG_EVENT_CONTEXT_UID:
 448                 return config_event_context_uid;
 449         case LTTNG_EVENT_CONTEXT_EUID:
 450                 return config_event_context_euid;
 451         case LTTNG_EVENT_CONTEXT_SUID:
 452                 return config_event_context_suid;
 453         case LTTNG_EVENT_CONTEXT_GID:
 454                 return config_event_context_gid;
 455         case LTTNG_EVENT_CONTEXT_EGID:
 456                 return config_event_context_egid;
 457         case LTTNG_EVENT_CONTEXT_SGID:
 458                 return config_event_context_sgid;
 459         case LTTNG_EVENT_CONTEXT_VUID:
 460                 return config_event_context_vuid;
 461         case LTTNG_EVENT_CONTEXT_VEUID:
 462                 return config_event_context_veuid;
 463         case LTTNG_EVENT_CONTEXT_VSUID:
 464                 return config_event_context_vsuid;
 465         case LTTNG_EVENT_CONTEXT_VGID:
 466                 return config_event_context_vgid;
 467         case LTTNG_EVENT_CONTEXT_VEGID:
 468                 return config_event_context_vegid;
 469         case LTTNG_EVENT_CONTEXT_VSGID:
 470                 return config_event_context_vsgid;
 471         default:
 472                 return NULL;
 473         }
 474 }
 475
 476 LTTNG_HIDDEN
 477 const char *mi_lttng_eventfieldtype_string(enum lttng_event_field_type val)
 478 {
 479         switch (val) {
 480         case(LTTNG_EVENT_FIELD_INTEGER):
 481                 return mi_lttng_element_type_integer;
 482         case(LTTNG_EVENT_FIELD_ENUM):
 483                 return mi_lttng_element_type_enum;
 484         case(LTTNG_EVENT_FIELD_FLOAT):
 485                 return mi_lttng_element_type_float;
 486         case(LTTNG_EVENT_FIELD_STRING):
 487                 return mi_lttng_element_type_string;
 488         default:
 489                 return mi_lttng_element_type_other;
 490         }
 491 }
 492
 493 LTTNG_HIDDEN
 494 const char *mi_lttng_domaintype_string(enum lttng_domain_type value)
 495 {
 496         /* Note: This is a *duplicate* of get_domain_str from bin/lttng/utils.c */
 497         switch (value) {
 498         case LTTNG_DOMAIN_KERNEL:
 499                 return config_domain_type_kernel;
 500         case LTTNG_DOMAIN_UST:
 501                 return config_domain_type_ust;
 502         case LTTNG_DOMAIN_JUL:
 503                 return config_domain_type_jul;
 504         case LTTNG_DOMAIN_LOG4J:
 505                 return config_domain_type_log4j;
 506         case LTTNG_DOMAIN_PYTHON:
 507                 return config_domain_type_python;
 508         default:
 509                 /* Should not have an unknown domain */
 510                 assert(0);
 511                 return NULL;
 512         }
 513 }
 514
 515 LTTNG_HIDDEN
 516 const char *mi_lttng_buffertype_string(enum lttng_buffer_type value)
 517 {
 518         switch (value) {
 519         case LTTNG_BUFFER_PER_PID:
 520                 return config_buffer_type_per_pid;
 521         case LTTNG_BUFFER_PER_UID:
 522                 return config_buffer_type_per_uid;
 523         case LTTNG_BUFFER_GLOBAL:
 524                 return config_buffer_type_global;
 525         default:
 526                 /* Should not have an unknow buffer type */
 527                 assert(0);
 528                 return NULL;
 529         }
 530 }
 531
 532 LTTNG_HIDDEN
 533 const char *mi_lttng_rotation_state_string(enum lttng_rotation_state value)
 534 {
 535         switch (value) {
 536         case LTTNG_ROTATION_STATE_ONGOING:
 537                 return mi_lttng_rotation_state_str_ongoing;
 538         case LTTNG_ROTATION_STATE_COMPLETED:
 539                 return mi_lttng_rotation_state_str_completed;
 540         case LTTNG_ROTATION_STATE_EXPIRED:
 541                 return mi_lttng_rotation_state_str_expired;
 542         case LTTNG_ROTATION_STATE_ERROR:
 543                 return mi_lttng_rotation_state_str_error;
 544         default:
 545                 /* Should not have an unknow rotation state. */
 546                 assert(0);
 547                 return NULL;
 548         }
 549 }
 550
 551 LTTNG_HIDDEN
 552 const char *mi_lttng_trace_archive_location_relay_protocol_type_string(
 553                 enum lttng_trace_archive_location_relay_protocol_type value)
 554 {
 555         switch (value) {
 556         case LTTNG_TRACE_ARCHIVE_LOCATION_RELAY_PROTOCOL_TYPE_TCP:
 557                 return mi_lttng_rotation_location_relay_protocol_str_tcp;
 558         default:
 559                 /* Should not have an unknow relay protocol. */
 560                 assert(0);
 561                 return NULL;
 562         }
 563 }
 564
 565 LTTNG_HIDDEN
 566 struct mi_writer *mi_lttng_writer_create(int fd_output, int mi_output_type)
 567 {
 568         struct mi_writer *mi_writer;
 569
 570         mi_writer = zmalloc(sizeof(struct mi_writer));
 571         if (!mi_writer) {
 572                 PERROR("zmalloc mi_writer_create");
 573                 goto end;
 574         }
 575         if (mi_output_type == LTTNG_MI_XML) {
 576                 mi_writer->writer = config_writer_create(fd_output, 0);
 577                 if (!mi_writer->writer) {
 578                         goto err_destroy;
 579                 }
 580                 mi_writer->type = LTTNG_MI_XML;
 581         } else {
 582                 goto err_destroy;
 583         }
 584
 585 end:
 586         return mi_writer;
 587
 588 err_destroy:
 589         free(mi_writer);
 590         return NULL;
 591 }
 592
 593 LTTNG_HIDDEN
 594 int mi_lttng_writer_destroy(struct mi_writer *writer)
 595 {
 596         int ret;
 597
 598         if (!writer) {
 599                 ret = -EINVAL;
 600                 goto end;
 601         }
 602
 603         ret = config_writer_destroy(writer->writer);
 604         if (ret < 0) {
 605                 goto end;
 606         }
 607
 608         free(writer);
 609 end:
 610         return ret;
 611 }
 612
 613 LTTNG_HIDDEN
 614 int mi_lttng_writer_command_open(struct mi_writer *writer, const char *command)
 615 {
 616         int ret;
 617
 618         /*
 619          * A command is always the MI's root node, it must declare the current
 620          * namespace and schema URIs and the schema's version.
 621          */
 622         ret = config_writer_open_element(writer->writer,
 623                         mi_lttng_element_command);
 624         if (ret) {
 625                 goto end;
 626         }
 627
 628         ret = config_writer_write_attribute(writer->writer,
 629                         mi_lttng_xmlns, DEFAULT_LTTNG_MI_NAMESPACE);
 630         if (ret) {
 631                 goto end;
 632         }
 633
 634         ret = config_writer_write_attribute(writer->writer,
 635                         mi_lttng_xmlns_xsi, mi_lttng_w3_schema_uri);
 636         if (ret) {
 637                 goto end;
 638         }
 639
 640         ret = config_writer_write_attribute(writer->writer,
 641                         mi_lttng_schema_location,
 642                         mi_lttng_schema_location_uri);
 643         if (ret) {
 644                 goto end;
 645         }
 646
 647         ret = config_writer_write_attribute(writer->writer,
 648                         mi_lttng_schema_version,
 649                         mi_lttng_schema_version_value);
 650         if (ret) {
 651                 goto end;
 652         }
 653
 654         ret = mi_lttng_writer_write_element_string(writer,
 655                         mi_lttng_element_command_name, command);
 656 end:
 657         return ret;
 658 }
 659
 660 LTTNG_HIDDEN
 661 int mi_lttng_writer_command_close(struct mi_writer *writer)
 662 {
 663         return mi_lttng_writer_close_element(writer);
 664 }
 665
 666 LTTNG_HIDDEN
 667 int mi_lttng_writer_open_element(struct mi_writer *writer,
 668                 const char *element_name)
 669 {
 670         return config_writer_open_element(writer->writer, element_name);
 671 }
 672
 673 LTTNG_HIDDEN
 674 int mi_lttng_writer_close_element(struct mi_writer *writer)
 675 {
 676         return config_writer_close_element(writer->writer);
 677 }
 678
 679 LTTNG_HIDDEN
 680 int mi_lttng_close_multi_element(struct mi_writer *writer,
 681                 unsigned int nb_element)
 682 {
 683         int ret, i;
 684
 685         if (nb_element < 1) {
 686                 ret = 0;
 687                 goto end;
 688         }
 689         for (i = 0; i < nb_element; i++) {
 690                 ret = mi_lttng_writer_close_element(writer);
 691                 if (ret) {
 692                         goto end;
 693                 }
 694         }
 695 end:
 696         return ret;
 697 }
 698
 699 LTTNG_HIDDEN
 700 int mi_lttng_writer_write_element_unsigned_int(struct mi_writer *writer,
 701                 const char *element_name, uint64_t value)
 702 {
 703         return config_writer_write_element_unsigned_int(writer->writer,
 704                         element_name, value);
 705 }
 706
 707 LTTNG_HIDDEN
 708 int mi_lttng_writer_write_element_signed_int(struct mi_writer *writer,
 709                 const char *element_name, int64_t value)
 710 {
 711         return config_writer_write_element_signed_int(writer->writer,
 712                         element_name, value);
 713 }
 714
 715 LTTNG_HIDDEN
 716 int mi_lttng_writer_write_element_bool(struct mi_writer *writer,
 717                 const char *element_name, int value)
 718 {
 719         return config_writer_write_element_bool(writer->writer,
 720                         element_name, value);
 721 }
 722
 723 LTTNG_HIDDEN
 724 int mi_lttng_writer_write_element_string(struct mi_writer *writer,
 725                 const char *element_name, const char *value)
 726 {
 727         return config_writer_write_element_string(writer->writer,
 728                         element_name, value);
 729 }
 730
 731 LTTNG_HIDDEN
 732 int mi_lttng_version(struct mi_writer *writer, struct mi_lttng_version *version,
 733         const char *lttng_description, const char *lttng_license)
 734 {
 735         int ret;
 736
 737         /* Open version */
 738         ret = mi_lttng_writer_open_element(writer, mi_lttng_element_version);
 739         if (ret) {
 740                 goto end;
 741         }
 742
 743         /* Version string (contain info like rc etc.) */
 744         ret = mi_lttng_writer_write_element_string(writer,
 745                         mi_lttng_element_version_str, version->version);
 746         if (ret) {
 747                 goto end;
 748         }
 749
 750         /* Major version number */
 751         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 752                         mi_lttng_element_version_major, version->version_major);
 753         if (ret) {
 754                 goto end;
 755         }
 756
 757         /* Minor version number */
 758         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 759                         mi_lttng_element_version_minor, version->version_minor);
 760         if (ret) {
 761                 goto end;
 762         }
 763
 764         /* Commit version number */
 765         ret = mi_lttng_writer_write_element_string(writer,
 766                         mi_lttng_element_version_commit, version->version_commit);
 767         if (ret) {
 768                 goto end;
 769         }
 770
 771         /* Patch number */
 772         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 773                         mi_lttng_element_version_patch_level, version->version_patchlevel);
 774         if (ret) {
 775                 goto end;
 776         }
 777
 778         /* Name of the version */
 779         ret = mi_lttng_writer_write_element_string(writer,
 780                         config_element_name, version->version_name);
 781         if (ret) {
 782                 goto end;
 783         }
 784
 785         /* Description mostly related to beer... */
 786         ret = mi_lttng_writer_write_element_string(writer,
 787                         mi_lttng_element_version_description, lttng_description);
 788         if (ret) {
 789                 goto end;
 790         }
 791
 792         /* url */
 793         ret = mi_lttng_writer_write_element_string(writer,
 794                         mi_lttng_element_version_web, version->package_url);
 795         if (ret) {
 796                 goto end;
 797         }
 798
 799         /* License: free as in free beer...no...*speech* */
 800         ret = mi_lttng_writer_write_element_string(writer,
 801                         mi_lttng_element_version_license, lttng_license);
 802         if (ret) {
 803                 goto end;
 804         }
 805
 806         /* Close version element */
 807         ret = mi_lttng_writer_close_element(writer);
 808
 809 end:
 810         return ret;
 811 }
 812
 813 LTTNG_HIDDEN
 814 int mi_lttng_sessions_open(struct mi_writer *writer)
 815 {
 816         return mi_lttng_writer_open_element(writer, config_element_sessions);
 817 }
 818
 819 LTTNG_HIDDEN
 820 int mi_lttng_session(struct mi_writer *writer,
 821                 struct lttng_session *session, int is_open)
 822 {
 823         int ret;
 824
 825         assert(session);
 826
 827         /* Open sessions element */
 828         ret = mi_lttng_writer_open_element(writer,
 829                         config_element_session);
 830         if (ret) {
 831                 goto end;
 832         }
 833
 834         /* Name of the session */
 835         ret = mi_lttng_writer_write_element_string(writer,
 836                         config_element_name, session->name);
 837         if (ret) {
 838                 goto end;
 839         }
 840
 841         /* Path */
 842         ret = mi_lttng_writer_write_element_string(writer,
 843                         config_element_path, session->path);
 844         if (ret) {
 845                 goto end;
 846         }
 847
 848         /* Enabled ? */
 849         ret = mi_lttng_writer_write_element_bool(writer,
 850                         config_element_enabled, session->enabled);
 851         if (ret) {
 852                 goto end;
 853         }
 854
 855         /* Snapshot mode */
 856         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 857                         config_element_snapshot_mode, session->snapshot_mode);
 858         if (ret) {
 859                 goto end;
 860         }
 861
 862         /* Live timer interval in usec */
 863         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 864                         config_element_live_timer_interval,
 865                         session->live_timer_interval);
 866         if (ret) {
 867                 goto end;
 868         }
 869
 870         if (!is_open) {
 871                 /* Closing session element */
 872                 ret = mi_lttng_writer_close_element(writer);
 873         }
 874 end:
 875         return ret;
 876
 877 }
 878
 879 LTTNG_HIDDEN
 880 int mi_lttng_domains_open(struct mi_writer *writer)
 881 {
 882         return mi_lttng_writer_open_element(writer, config_element_domains);
 883 }
 884
 885 LTTNG_HIDDEN
 886 int mi_lttng_domain(struct mi_writer *writer,
 887                 struct lttng_domain *domain, int is_open)
 888 {
 889         int ret = 0;
 890         const char *str_domain;
 891         const char *str_buffer;
 892
 893         assert(domain);
 894
 895         /* Open domain element */
 896         ret = mi_lttng_writer_open_element(writer, config_element_domain);
 897         if (ret) {
 898                 goto end;
 899         }
 900
 901         /* Domain Type */
 902         str_domain = mi_lttng_domaintype_string(domain->type);
 903         ret = mi_lttng_writer_write_element_string(writer, config_element_type,
 904                         str_domain);
 905         if (ret) {
 906                 goto end;
 907         }
 908
 909         /* Buffer Type */
 910         str_buffer= mi_lttng_buffertype_string(domain->buf_type);
 911         ret = mi_lttng_writer_write_element_string(writer,
 912                         config_element_buffer_type, str_buffer);
 913         if (ret) {
 914                 goto end;
 915         }
 916
 917         /* TODO: union  attr
 918          * This union is not currently used and was added for
 919          * future ust domain support.
 920          * Date: 25-06-2014
 921          * */
 922
 923         if (!is_open) {
 924                 /* Closing domain element */
 925                 ret = mi_lttng_writer_close_element(writer);
 926         }
 927
 928 end:
 929         return ret;
 930
 931 }
 932
 933 LTTNG_HIDDEN
 934 int mi_lttng_channels_open(struct mi_writer *writer)
 935 {
 936         return mi_lttng_writer_open_element(writer, config_element_channels);
 937 }
 938
 939 LTTNG_HIDDEN
 940 int mi_lttng_channel(struct mi_writer *writer,
 941                 struct lttng_channel *channel, int is_open)
 942 {
 943         int ret = 0;
 944
 945         assert(channel);
 946
 947         /* Opening channel element */
 948         ret = mi_lttng_writer_open_element(writer, config_element_channel);
 949         if (ret) {
 950                 goto end;
 951         }
 952
 953         /* Name */
 954         ret = mi_lttng_writer_write_element_string(writer, config_element_name,
 955                         channel->name);
 956         if (ret) {
 957                 goto end;
 958         }
 959
 960         /* Enabled ? */
 961         ret = mi_lttng_writer_write_element_bool(writer,
 962                         config_element_enabled, channel->enabled);
 963         if (ret) {
 964                 goto end;
 965         }
 966
 967         /* Attribute */
 968         ret = mi_lttng_channel_attr(writer, &channel->attr);
 969         if (ret) {
 970                 goto end;
 971         }
 972
 973         if (!is_open) {
 974                 /* Closing channel element */
 975                 ret = mi_lttng_writer_close_element(writer);
 976                 if (ret) {
 977                         goto end;
 978                 }
 979         }
 980 end:
 981         return ret;
 982 }
 983
 984 LTTNG_HIDDEN
 985 int mi_lttng_channel_attr(struct mi_writer *writer,
 986                 struct lttng_channel_attr *attr)
 987 {
 988         int ret = 0;
 989         struct lttng_channel *chan = caa_container_of(attr,
 990                         struct lttng_channel, attr);
 991         uint64_t discarded_events, lost_packets, monitor_timer_interval;
 992         int64_t blocking_timeout;
 993
 994         assert(attr);
 995
 996         ret = lttng_channel_get_discarded_event_count(chan, &discarded_events);
 997         if (ret) {
 998                 goto end;
 999         }
1000
1001         ret = lttng_channel_get_lost_packet_count(chan, &lost_packets);
1002         if (ret) {
1003                 goto end;
1004         }
1005
1006         ret = lttng_channel_get_monitor_timer_interval(chan,
1007                         &monitor_timer_interval);
1008         if (ret) {
1009                 goto end;
1010         }
1011
1012         ret = lttng_channel_get_blocking_timeout(chan,
1013                         &blocking_timeout);
1014         if (ret) {
1015                 goto end;
1016         }
1017
1018         /* Opening Attributes */
1019         ret = mi_lttng_writer_open_element(writer, config_element_attributes);
1020         if (ret) {
1021                 goto end;
1022         }
1023
1024         /* Overwrite */
1025         ret = mi_lttng_writer_write_element_string(writer,
1026                 config_element_overwrite_mode,
1027                 attr->overwrite ? config_overwrite_mode_overwrite :
1028                         config_overwrite_mode_discard);
1029         if (ret) {
1030                 goto end;
1031         }
1032
1033         /* Sub buffer size in byte */
1034         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1035                 config_element_subbuf_size, attr->subbuf_size);
1036         if (ret) {
1037                 goto end;
1038         }
1039
1040         /* Number of subbuffer (power of two) */
1041         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1042                 config_element_num_subbuf,
1043                 attr->num_subbuf);
1044         if (ret) {
1045                 goto end;
1046         }
1047
1048         /* Switch timer interval in usec */
1049         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1050                 config_element_switch_timer_interval,
1051                 attr->switch_timer_interval);
1052         if (ret) {
1053                 goto end;
1054         }
1055
1056         /* Read timer interval in usec */
1057         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1058                 config_element_read_timer_interval,
1059                 attr->read_timer_interval);
1060         if (ret) {
1061                 goto end;
1062         }
1063
1064         /* Monitor timer interval in usec */
1065         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1066                 config_element_monitor_timer_interval,
1067                 monitor_timer_interval);
1068         if (ret) {
1069                 goto end;
1070         }
1071
1072         /* Retry timeout in usec */
1073         ret = mi_lttng_writer_write_element_signed_int(writer,
1074                 config_element_blocking_timeout,
1075                 blocking_timeout);
1076         if (ret) {
1077                 goto end;
1078         }
1079
1080         /* Event output */
1081         ret = mi_lttng_writer_write_element_string(writer,
1082                 config_element_output_type,
1083                 attr->output == LTTNG_EVENT_SPLICE ?
1084                 config_output_type_splice : config_output_type_mmap);
1085         if (ret) {
1086                 goto end;
1087         }
1088
1089         /* Tracefile size in bytes */
1090         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1091                 config_element_tracefile_size, attr->tracefile_size);
1092         if (ret) {
1093                 goto end;
1094         }
1095
1096         /* Count of tracefiles */
1097         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1098                 config_element_tracefile_count,
1099                 attr->tracefile_count);
1100         if (ret) {
1101                 goto end;
1102         }
1103
1104         /* Live timer interval in usec*/
1105         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1106                 config_element_live_timer_interval,
1107                 attr->live_timer_interval);
1108         if (ret) {
1109                 goto end;
1110         }
1111
1112         /* Discarded events */
1113         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1114                 config_element_discarded_events,
1115                 discarded_events);
1116         if (ret) {
1117                 goto end;
1118         }
1119
1120         /* Lost packets */
1121         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1122                 config_element_lost_packets,
1123                 lost_packets);
1124         if (ret) {
1125                 goto end;
1126         }
1127
1128         /* Closing attributes */
1129         ret = mi_lttng_writer_close_element(writer);
1130         if (ret) {
1131                 goto end;
1132         }
1133 end:
1134         return ret;
1135
1136 }
1137
1138 LTTNG_HIDDEN
1139 int mi_lttng_event_common_attributes(struct mi_writer *writer,
1140                 struct lttng_event *event)
1141 {
1142         int ret;
1143         const char *filter_expression;
1144
1145         /* Open event element */
1146         ret = mi_lttng_writer_open_element(writer, config_element_event);
1147         if (ret) {
1148                 goto end;
1149         }
1150
1151         /* Event name */
1152         ret = mi_lttng_writer_write_element_string(writer,
1153                         config_element_name, event->name);
1154         if (ret) {
1155                 goto end;
1156         }
1157
1158         /* Event type */
1159         ret = mi_lttng_writer_write_element_string(writer,
1160                         config_element_type, mi_lttng_eventtype_string(event->type));
1161         if (ret) {
1162                 goto end;
1163         }
1164
1165         /* Is event enabled */
1166         ret = mi_lttng_writer_write_element_bool(writer,
1167                         config_element_enabled, event->enabled);
1168         if (ret) {
1169                 goto end;
1170         }
1171
1172         /* Event filter expression */
1173         ret = lttng_event_get_filter_expression(event, &filter_expression);
1174         if (ret) {
1175                 goto end;
1176         }
1177
1178         if (filter_expression) {
1179                 ret = mi_lttng_writer_write_element_string(writer,
1180                                 config_element_filter_expression,
1181                                 filter_expression);
1182                 if (ret) {
1183                         goto end;
1184                 }
1185         }
1186
1187 end:
1188         return ret;
1189 }
1190
1191 static int write_event_exclusions(struct mi_writer *writer,
1192                 struct lttng_event *event)
1193 {
1194         int i;
1195         int ret;
1196         int exclusion_count;
1197
1198         /* Open event exclusions */
1199         ret = mi_lttng_writer_open_element(writer, config_element_exclusions);
1200         if (ret) {
1201                 goto end;
1202         }
1203
1204         exclusion_count = lttng_event_get_exclusion_name_count(event);
1205         if (exclusion_count < 0) {
1206                 ret = exclusion_count;
1207                 goto end;
1208         }
1209
1210         for (i = 0; i < exclusion_count; i++) {
1211                 const char *name;
1212
1213                 ret = lttng_event_get_exclusion_name(event, i, &name);
1214                 if (ret) {
1215                         /* Close exclusions */
1216                         mi_lttng_writer_close_element(writer);
1217                         goto end;
1218                 }
1219
1220                 ret = mi_lttng_writer_write_element_string(writer,
1221                                 config_element_exclusion, name);
1222                 if (ret) {
1223                         /* Close exclusions */
1224                         mi_lttng_writer_close_element(writer);
1225                         goto end;
1226                 }
1227         }
1228
1229         /* Close exclusions */
1230         ret = mi_lttng_writer_close_element(writer);
1231
1232 end:
1233         return ret;
1234 }
1235
1236 LTTNG_HIDDEN
1237 int mi_lttng_event_tracepoint_loglevel(struct mi_writer *writer,
1238                 struct lttng_event *event, enum lttng_domain_type domain)
1239 {
1240         int ret;
1241
1242         /* Event loglevel */
1243         ret = mi_lttng_writer_write_element_string(writer,
1244                         config_element_loglevel,
1245                         mi_lttng_loglevel_string(event->loglevel, domain));
1246         if (ret) {
1247                 goto end;
1248         }
1249
1250         /* Log level type */
1251         ret = mi_lttng_writer_write_element_string(writer,
1252                         config_element_loglevel_type,
1253                         mi_lttng_logleveltype_string(event->loglevel_type));
1254         if (ret) {
1255                 goto end;
1256         }
1257
1258         /* Event exclusions */
1259         ret = write_event_exclusions(writer, event);
1260
1261 end:
1262         return ret;
1263 }
1264
1265 LTTNG_HIDDEN
1266 int mi_lttng_event_tracepoint_no_loglevel(struct mi_writer *writer,
1267                 struct lttng_event *event)
1268 {
1269         /* event exclusion filter */
1270         return write_event_exclusions(writer, event);
1271 }
1272
1273 LTTNG_HIDDEN
1274 int mi_lttng_event_function_probe(struct mi_writer *writer,
1275                 struct lttng_event *event)
1276 {
1277         int ret;
1278
1279         ret = mi_lttng_writer_open_element(writer, config_element_attributes);
1280         if (ret) {
1281                 goto end;
1282         }
1283
1284         ret = mi_lttng_writer_open_element(writer, config_element_probe_attributes);
1285         if (ret) {
1286                 goto end;
1287         }
1288
1289         if (event->attr.probe.addr != 0) {
1290                 /* event probe address */
1291                 ret = mi_lttng_writer_write_element_unsigned_int(writer,
1292                                 config_element_address, event->attr.probe.addr);
1293                 if (ret) {
1294                         goto end;
1295                 }
1296         } else {
1297                 /* event probe offset */
1298                 ret = mi_lttng_writer_write_element_unsigned_int(writer,
1299                                 config_element_offset, event->attr.probe.offset);
1300                 if (ret) {
1301                         goto end;
1302                 }
1303
1304                 /* event probe symbol_name */
1305                 ret = mi_lttng_writer_write_element_string(writer,
1306                                 config_element_symbol_name, event->attr.probe.symbol_name);
1307                 if (ret) {
1308                         goto end;
1309                 }
1310         }
1311
1312         /* Close probe_attributes and attributes */
1313         ret = mi_lttng_close_multi_element(writer, 2);
1314 end:
1315         return ret;
1316 }
1317
1318 static
1319 int mi_lttng_event_userspace_probe(struct mi_writer *writer,
1320                 struct lttng_event *event)
1321 {
1322         int ret;
1323         const struct lttng_userspace_probe_location *location;
1324         const struct lttng_userspace_probe_location_lookup_method *lookup_method;
1325         enum lttng_userspace_probe_location_lookup_method_type lookup_type;
1326
1327         location = lttng_event_get_userspace_probe_location(event);
1328         if (!location) {
1329                 ret = -LTTNG_ERR_INVALID;
1330                 goto end;
1331         }
1332
1333         lookup_method = lttng_userspace_probe_location_get_lookup_method(location);
1334         if (!lookup_method) {
1335                 ret = -LTTNG_ERR_INVALID;
1336                 goto end;
1337         }
1338
1339         lookup_type = lttng_userspace_probe_location_lookup_method_get_type(lookup_method);
1340
1341         ret = mi_lttng_writer_open_element(writer, config_element_attributes);
1342         if (ret) {
1343                 goto end;
1344         }
1345
1346         switch (lttng_userspace_probe_location_get_type(location)) {
1347         case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION:
1348         {
1349                 const char *function_name;
1350                 const char *binary_path;
1351
1352                 ret = mi_lttng_writer_open_element(writer,
1353                                 config_element_userspace_probe_function_attributes);
1354                 if (ret) {
1355                         goto end;
1356                 }
1357
1358                 switch (lookup_type) {
1359                 case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF:
1360                         ret = mi_lttng_writer_write_element_string(writer,
1361                                         config_element_userspace_probe_lookup,
1362                                         config_element_userspace_probe_lookup_function_elf);
1363                         if (ret) {
1364                                 goto end;
1365                         }
1366                         break;
1367                 case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_DEFAULT:
1368                         ret = mi_lttng_writer_write_element_string(writer,
1369                                         config_element_userspace_probe_lookup,
1370                                         config_element_userspace_probe_lookup_function_default);
1371                         if (ret) {
1372                                 goto end;
1373                         }
1374                         break;
1375                 default:
1376                         goto end;
1377                 }
1378
1379                 binary_path = lttng_userspace_probe_location_function_get_binary_path(location);
1380                 ret = mi_lttng_writer_write_element_string(writer,
1381                                 config_element_userspace_probe_location_binary_path, binary_path);
1382                 if (ret) {
1383                         goto end;
1384                 }
1385
1386                 function_name = lttng_userspace_probe_location_function_get_function_name(location);
1387                 ret = mi_lttng_writer_write_element_string(writer,
1388                                 config_element_userspace_probe_function_location_function_name,
1389                                 function_name);
1390                 if (ret) {
1391                         goto end;
1392                 }
1393
1394                 break;
1395         }
1396         case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT:
1397         {
1398                 const char *probe_name, *provider_name;
1399                 const char *binary_path;
1400
1401                 ret = mi_lttng_writer_open_element(writer,
1402                                 config_element_userspace_probe_function_attributes);
1403                 if (ret) {
1404                         goto end;
1405                 }
1406
1407                 switch (lookup_type) {
1408                 case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT:
1409                         ret = mi_lttng_writer_write_element_string(writer,
1410                                         config_element_userspace_probe_lookup,
1411                                         config_element_userspace_probe_lookup_tracepoint_sdt);
1412                         if (ret) {
1413                                 goto end;
1414                         }
1415                         break;
1416                 default:
1417                         goto end;
1418                 }
1419
1420                 binary_path = lttng_userspace_probe_location_tracepoint_get_binary_path(location);
1421                 ret = mi_lttng_writer_write_element_string(writer,
1422                                 config_element_userspace_probe_location_binary_path,
1423                                 binary_path);
1424                 if (ret) {
1425                         goto end;
1426                 }
1427
1428                 provider_name = lttng_userspace_probe_location_tracepoint_get_provider_name(location);
1429                 ret = mi_lttng_writer_write_element_string(writer,
1430                                 config_element_userspace_probe_tracepoint_location_provider_name,
1431                                 provider_name);
1432                 if (ret) {
1433                         goto end;
1434                 }
1435
1436                 probe_name = lttng_userspace_probe_location_tracepoint_get_probe_name(location);
1437                 ret = mi_lttng_writer_write_element_string(writer,
1438                                 config_element_userspace_probe_tracepoint_location_probe_name, probe_name);
1439                 if (ret) {
1440                         goto end;
1441                 }
1442                 break;
1443         }
1444         default:
1445                 ERR("Invalid probe type encountered");
1446         }
1447         /* Close probe_attributes and attributes */
1448         ret = mi_lttng_close_multi_element(writer, 2);
1449 end:
1450         return ret;
1451 }
1452
1453 LTTNG_HIDDEN
1454 int mi_lttng_event_function_entry(struct mi_writer *writer,
1455                 struct lttng_event *event)
1456 {
1457         int ret;
1458
1459         ret = mi_lttng_writer_open_element(writer, config_element_attributes);
1460         if (ret) {
1461                 goto end;
1462         }
1463
1464         ret = mi_lttng_writer_open_element(writer, config_element_probe_attributes);
1465         if (ret) {
1466                 goto end;
1467         }
1468
1469         /* event probe symbol_name */
1470         ret = mi_lttng_writer_write_element_string(writer,
1471                         config_element_symbol_name, event->attr.ftrace.symbol_name);
1472         if (ret) {
1473                 goto end;
1474         }
1475
1476         /* Close function_attributes and attributes */
1477         ret = mi_lttng_close_multi_element(writer, 2);
1478 end:
1479         return ret;
1480 }
1481
1482 LTTNG_HIDDEN
1483 int mi_lttng_events_open(struct mi_writer *writer)
1484 {
1485         return mi_lttng_writer_open_element(writer, config_element_events);
1486 }
1487
1488 LTTNG_HIDDEN
1489 int mi_lttng_event(struct mi_writer *writer,
1490                 struct lttng_event *event, int is_open, enum lttng_domain_type domain)
1491 {
1492         int ret;
1493
1494         ret = mi_lttng_event_common_attributes(writer, event);
1495         if (ret) {
1496                 goto end;
1497         }
1498
1499         switch (event->type) {
1500         case LTTNG_EVENT_TRACEPOINT:
1501         {
1502                 if (event->loglevel != -1) {
1503                         ret = mi_lttng_event_tracepoint_loglevel(writer, event, domain);
1504                 } else {
1505                         ret = mi_lttng_event_tracepoint_no_loglevel(writer, event);
1506                 }
1507                 break;
1508         }
1509         case LTTNG_EVENT_FUNCTION:
1510                 /* Fallthrough */
1511         case LTTNG_EVENT_PROBE:
1512                 ret = mi_lttng_event_function_probe(writer, event);
1513                 break;
1514         case LTTNG_EVENT_FUNCTION_ENTRY:
1515                 ret = mi_lttng_event_function_entry(writer, event);
1516                 break;
1517         case LTTNG_EVENT_USERSPACE_PROBE:
1518                 ret = mi_lttng_event_userspace_probe(writer, event);
1519                 break;
1520         case LTTNG_EVENT_ALL:
1521                 /* Fallthrough */
1522         default:
1523                 break;
1524         }
1525
1526         if (ret) {
1527                 goto end;
1528         }
1529
1530         if (!is_open) {
1531                 ret = mi_lttng_writer_close_element(writer);
1532         }
1533
1534 end:
1535         return ret;
1536 }
1537
1538 LTTNG_HIDDEN
1539 int mi_lttng_trackers_open(struct mi_writer *writer)
1540 {
1541         return mi_lttng_writer_open_element(writer, config_element_trackers);
1542 }
1543
1544 static int get_tracker_elements(enum lttng_tracker_type tracker_type,
1545                 const char **element_id_tracker,
1546                 const char **element_target_id)
1547 {
1548         int ret = 0;
1549
1550         switch (tracker_type) {
1551         case LTTNG_TRACKER_PID:
1552                 *element_id_tracker = config_element_pid_tracker;
1553                 *element_target_id = config_element_target_pid;
1554                 break;
1555         case LTTNG_TRACKER_VPID:
1556                 *element_id_tracker = config_element_vpid_tracker;
1557                 *element_target_id = config_element_target_vpid;
1558                 break;
1559         case LTTNG_TRACKER_UID:
1560                 *element_id_tracker = config_element_uid_tracker;
1561                 *element_target_id = config_element_target_uid;
1562                 break;
1563         case LTTNG_TRACKER_VUID:
1564                 *element_id_tracker = config_element_vuid_tracker;
1565                 *element_target_id = config_element_target_vuid;
1566                 break;
1567         case LTTNG_TRACKER_GID:
1568                 *element_id_tracker = config_element_gid_tracker;
1569                 *element_target_id = config_element_target_gid;
1570                 break;
1571         case LTTNG_TRACKER_VGID:
1572                 *element_id_tracker = config_element_vgid_tracker;
1573                 *element_target_id = config_element_target_vgid;
1574                 break;
1575         default:
1576                 ret = LTTNG_ERR_SAVE_IO_FAIL;
1577         }
1578         return ret;
1579 }
1580
1581 LTTNG_HIDDEN
1582 int mi_lttng_id_tracker_open(
1583                 struct mi_writer *writer, enum lttng_tracker_type tracker_type)
1584 {
1585         int ret;
1586         const char *element_id_tracker, *element_target_id;
1587
1588         ret = get_tracker_elements(
1589                         tracker_type, &element_id_tracker, &element_target_id);
1590         if (ret) {
1591                 return ret;
1592         }
1593
1594         /* Open element $id_tracker */
1595         ret = mi_lttng_writer_open_element(writer, element_id_tracker);
1596         if (ret) {
1597                 goto end;
1598         }
1599
1600         /* Open targets element */
1601         ret = mi_lttng_targets_open(writer);
1602 end:
1603         return ret;
1604 }
1605
1606 LTTNG_HIDDEN
1607 int mi_lttng_pids_open(struct mi_writer *writer)
1608 {
1609         return mi_lttng_writer_open_element(writer, config_element_pids);
1610 }
1611
1612 /*
1613  * TODO: move the listing of pid for user agent to process semantic on
1614  * mi api bump. The use of process element break the mi api.
1615  */
1616 LTTNG_HIDDEN
1617 int mi_lttng_pid(struct mi_writer *writer,
1618                 pid_t pid,
1619                 const char *name,
1620                 int is_open)
1621 {
1622         int ret;
1623
1624         /* Open pid process */
1625         ret = mi_lttng_writer_open_element(writer, config_element_pid);
1626         if (ret) {
1627                 goto end;
1628         }
1629
1630         /* Writing pid number */
1631         ret = mi_lttng_writer_write_element_signed_int(writer,
1632                         mi_lttng_element_pid_id, (int)pid);
1633         if (ret) {
1634                 goto end;
1635         }
1636
1637         /* Writing name of the process */
1638         if (name) {
1639                 ret = mi_lttng_writer_write_element_string(writer, config_element_name,
1640                                 name);
1641                 if (ret) {
1642                         goto end;
1643                 }
1644         }
1645
1646         if (!is_open) {
1647                 /* Closing Pid */
1648                 ret = mi_lttng_writer_close_element(writer);
1649         }
1650
1651 end:
1652         return ret;
1653 }
1654
1655 LTTNG_HIDDEN
1656 int mi_lttng_targets_open(struct mi_writer *writer)
1657 {
1658         return mi_lttng_writer_open_element(writer,
1659                         config_element_targets);
1660 }
1661
1662 LTTNG_HIDDEN
1663 int mi_lttng_id_target(struct mi_writer *writer,
1664                 enum lttng_tracker_type tracker_type,
1665                 const struct lttng_tracker_id *id,
1666                 int is_open)
1667 {
1668         int ret;
1669         const char *element_id_tracker, *element_target_id;
1670         enum lttng_tracker_id_status status;
1671         int value;
1672         const char *string;
1673
1674         ret = get_tracker_elements(
1675                         tracker_type, &element_id_tracker, &element_target_id);
1676         if (ret) {
1677                 return ret;
1678         }
1679
1680         switch (lttng_tracker_id_get_type(id)) {
1681         case LTTNG_ID_ALL:
1682                 ret = mi_lttng_writer_open_element(writer, element_target_id);
1683                 if (ret) {
1684                         goto end;
1685                 }
1686                 ret = mi_lttng_writer_open_element(writer, config_element_type);
1687                 if (ret) {
1688                         goto end;
1689                 }
1690                 ret = mi_lttng_writer_write_element_bool(
1691                                 writer, config_element_all, 1);
1692                 if (ret) {
1693                         goto end;
1694                 }
1695                 ret = mi_lttng_writer_close_element(writer);
1696                 if (ret) {
1697                         goto end;
1698                 }
1699                 break;
1700         case LTTNG_ID_VALUE:
1701                 ret = mi_lttng_writer_open_element(writer, element_target_id);
1702                 if (ret) {
1703                         goto end;
1704                 }
1705                 ret = mi_lttng_writer_open_element(writer, config_element_type);
1706                 if (ret) {
1707                         goto end;
1708                 }
1709
1710                 status = lttng_tracker_id_get_value(id, &value);
1711                 if (status != LTTNG_TRACKER_ID_STATUS_OK) {
1712                         ret = -1;
1713                         goto end;
1714                 }
1715
1716                 ret = mi_lttng_writer_write_element_signed_int(
1717                                 writer, config_element_id, value);
1718                 if (ret) {
1719                         goto end;
1720                 }
1721                 ret = mi_lttng_writer_close_element(writer);
1722                 if (ret) {
1723                         goto end;
1724                 }
1725                 break;
1726         case LTTNG_ID_STRING:
1727                 ret = mi_lttng_writer_open_element(writer, element_target_id);
1728                 if (ret) {
1729                         goto end;
1730                 }
1731                 ret = mi_lttng_writer_open_element(writer, config_element_type);
1732                 if (ret) {
1733                         goto end;
1734                 }
1735
1736                 status = lttng_tracker_id_get_string(id, &string);
1737                 if (status != LTTNG_TRACKER_ID_STATUS_OK) {
1738                         ret = -1;
1739                         goto end;
1740                 }
1741
1742                 ret = mi_lttng_writer_write_element_string(
1743                                 writer, config_element_name, string);
1744                 if (ret) {
1745                         goto end;
1746                 }
1747                 ret = mi_lttng_writer_close_element(writer);
1748                 if (ret) {
1749                         goto end;
1750                 }
1751                 break;
1752         case LTTNG_ID_UNKNOWN:
1753                 ret = -LTTNG_ERR_INVALID;
1754                 goto end;
1755         }
1756         if (ret) {
1757                 goto end;
1758         }
1759
1760         if (!is_open) {
1761                 ret = mi_lttng_writer_close_element(writer);
1762                 if (ret) {
1763                         goto end;
1764                 }
1765         }
1766
1767 end:
1768         return ret;
1769 }
1770
1771 LTTNG_HIDDEN
1772 int mi_lttng_event_fields_open(struct mi_writer *writer)
1773 {
1774         return mi_lttng_writer_open_element(writer, mi_lttng_element_event_fields);
1775 }
1776
1777 LTTNG_HIDDEN
1778 int mi_lttng_event_field(struct mi_writer *writer,
1779                 struct lttng_event_field *field)
1780 {
1781         int ret;
1782
1783         if (!field->field_name[0]) {
1784                 ret = 0;
1785                 goto end;
1786         }
1787
1788         /* Open field */
1789         ret = mi_lttng_writer_open_element(writer, mi_lttng_element_event_field);
1790         if (ret) {
1791                 goto end;
1792         }
1793
1794         if (!field->field_name[0]) {
1795                 goto close;
1796         }
1797
1798         /* Name */
1799         ret = mi_lttng_writer_write_element_string(writer, config_element_name,
1800                         field->field_name);
1801         if (ret) {
1802                 goto end;
1803         }
1804
1805         /* Type */
1806         ret = mi_lttng_writer_write_element_string(writer, config_element_type,
1807                         mi_lttng_eventfieldtype_string(field->type));
1808         if (ret) {
1809                 goto end;
1810         }
1811
1812         /* nowrite  */
1813         ret = mi_lttng_writer_write_element_signed_int(writer,
1814                         mi_lttng_element_nowrite, field->nowrite);
1815         if (ret) {
1816                 goto end;
1817         }
1818
1819 close:
1820         /* Close field element */
1821         ret = mi_lttng_writer_close_element(writer);
1822
1823 end:
1824         return ret;
1825 }
1826
1827 LTTNG_HIDDEN
1828 int mi_lttng_perf_counter_context(struct mi_writer *writer,
1829                 struct lttng_event_perf_counter_ctx  *perf_context)
1830 {
1831         int ret;
1832
1833         /* Open perf_counter_context */
1834         ret = mi_lttng_writer_open_element(writer,
1835                         mi_lttng_element_perf_counter_context);
1836         if (ret) {
1837                 goto end;
1838         }
1839
1840         /* Type */
1841         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1842                         config_element_type, perf_context->type);
1843         if (ret) {
1844                 goto end;
1845         }
1846
1847         /* Config */
1848         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1849                         config_element_config, perf_context->config);
1850         if (ret) {
1851                 goto end;
1852         }
1853
1854         /* Name of the perf counter */
1855         ret = mi_lttng_writer_write_element_string(writer,
1856                         config_element_name, perf_context->name);
1857         if (ret) {
1858                 goto end;
1859         }
1860
1861         /* Close perf_counter_context */
1862         ret = mi_lttng_writer_close_element(writer);
1863 end:
1864         return ret;
1865 }
1866
1867 static
1868 int mi_lttng_app_context(struct mi_writer *writer,
1869                 const char *provider_name, const char *ctx_name)
1870 {
1871         int ret;
1872
1873         /* Open app */
1874         ret = mi_lttng_writer_open_element(writer,
1875                         config_element_context_app);
1876         if (ret) {
1877                 goto end;
1878         }
1879
1880         /* provider_name */
1881         ret = mi_lttng_writer_write_element_string(writer,
1882                         config_element_context_app_provider_name,
1883                         provider_name);
1884         if (ret) {
1885                 goto end;
1886         }
1887
1888         /* ctx_name */
1889         ret = mi_lttng_writer_write_element_string(writer,
1890                         config_element_context_app_ctx_name, ctx_name);
1891         if (ret) {
1892                 goto end;
1893         }
1894
1895         /* Close app */
1896         ret = mi_lttng_writer_close_element(writer);
1897 end:
1898         return ret;
1899 }
1900
1901 LTTNG_HIDDEN
1902 int mi_lttng_context(struct mi_writer *writer,
1903                 struct lttng_event_context *context, int is_open)
1904 {
1905         int ret;
1906
1907         /* Open context */
1908         ret = mi_lttng_writer_open_element(writer , config_element_context);
1909         if (ret) {
1910                 goto end;
1911         }
1912
1913         /* Special case for PERF_*_COUNTER
1914          * print the lttng_event_perf_counter_ctx*/
1915         switch (context->ctx) {
1916         case LTTNG_EVENT_CONTEXT_PERF_COUNTER:
1917         case LTTNG_EVENT_CONTEXT_PERF_THREAD_COUNTER:
1918         case LTTNG_EVENT_CONTEXT_PERF_CPU_COUNTER:
1919         {
1920                 struct lttng_event_perf_counter_ctx *perf_context =
1921                                 &context->u.perf_counter;
1922                 ret =  mi_lttng_perf_counter_context(writer, perf_context);
1923                 if (ret) {
1924                         goto end;
1925                 }
1926                 break;
1927         }
1928         case LTTNG_EVENT_CONTEXT_APP_CONTEXT:
1929         {
1930                 ret = mi_lttng_app_context(writer,
1931                                 context->u.app_ctx.provider_name,
1932                                 context->u.app_ctx.ctx_name);
1933                 if (ret) {
1934                         goto end;
1935                 }
1936                 break;
1937         }
1938         default:
1939         {
1940                 const char *type_string = mi_lttng_event_contexttype_string(
1941                                 context->ctx);
1942                 if (!type_string) {
1943                         ret = -LTTNG_ERR_INVALID;
1944                         goto end;
1945                 }
1946
1947                 /* Print context type */
1948                 ret = mi_lttng_writer_write_element_string(writer,
1949                                 config_element_type, type_string);
1950                 break;
1951         }
1952         }
1953
1954         /* Close context */
1955         if (!is_open) {
1956                 ret = mi_lttng_writer_close_element(writer);
1957         }
1958
1959 end:
1960         return ret;
1961 }
1962
1963 LTTNG_HIDDEN
1964 int mi_lttng_snapshot_output_session_name(struct mi_writer *writer,
1965                 const char *session_name)
1966 {
1967         int ret;
1968
1969         /* Open session element */
1970         ret = mi_lttng_writer_open_element(writer, config_element_session);
1971         if (ret) {
1972                 goto end;
1973         }
1974
1975         /* Snapshot output list for current session name */
1976         ret = mi_lttng_writer_write_element_string(writer, config_element_name,
1977                         session_name);
1978         if (ret) {
1979                 goto end;
1980         }
1981
1982         /* Open element snapshots (sequence one snapshot) */
1983         ret = mi_lttng_writer_open_element(writer, mi_lttng_element_snapshots);
1984         if (ret) {
1985                 goto end;
1986         }
1987
1988 end:
1989         return ret;
1990 }
1991
1992 LTTNG_HIDDEN
1993 int mi_lttng_snapshot_list_output(struct mi_writer *writer,
1994                 struct lttng_snapshot_output *output)
1995 {
1996         int ret;
1997
1998         /* Open element snapshot output */
1999         ret = mi_lttng_writer_open_element(writer,
2000                         mi_lttng_element_command_snapshot);
2001         if (ret) {
2002                 goto end;
2003         }
2004
2005         /* ID of the snapshot output */
2006         ret = mi_lttng_writer_write_element_unsigned_int(writer,
2007                         mi_lttng_element_id, output->id);
2008         if (ret) {
2009                 goto end;
2010         }
2011
2012         /* Name of the output */
2013         ret = mi_lttng_writer_write_element_string(writer, config_element_name,
2014                         output->name);
2015         if (ret) {
2016                 goto end;
2017         }
2018
2019         /* Destination of the output (ctrl_url)*/
2020         ret = mi_lttng_writer_write_element_string(writer,
2021                         mi_lttng_element_snapshot_ctrl_url, output->ctrl_url);
2022         if (ret) {
2023                 goto end;
2024         }
2025
2026         /* Destination of the output (data_url) */
2027         ret = mi_lttng_writer_write_element_string(writer,
2028                         mi_lttng_element_snapshot_data_url, output->data_url);
2029         if (ret) {
2030                 goto end;
2031         }
2032
2033         /* total size of all stream combined */
2034         ret = mi_lttng_writer_write_element_unsigned_int(writer,
2035                         mi_lttng_element_snapshot_max_size, output->max_size);
2036         if (ret) {
2037                 goto end;
2038         }
2039
2040         /* Close snapshot output element */
2041         ret = mi_lttng_writer_close_element(writer);
2042
2043 end:
2044         return ret;
2045 }
2046
2047 LTTNG_HIDDEN
2048 int mi_lttng_snapshot_del_output(struct mi_writer *writer, int id,
2049                 const char *name, const char *current_session_name)
2050 {
2051         int ret;
2052
2053         /* Open element del_snapshot */
2054         ret = mi_lttng_writer_open_element(writer,
2055                         mi_lttng_element_command_snapshot);
2056         if (ret) {
2057                 goto end;
2058         }
2059
2060
2061         if (id != UINT32_MAX) {
2062                 /* "Snapshot output "id" successfully deleted
2063                  * for "current_session_name"
2064                  * ID of the snapshot output
2065                  */
2066                 ret = mi_lttng_writer_write_element_unsigned_int(writer,
2067                                 mi_lttng_element_id, id);
2068                 if (ret) {
2069                         goto end;
2070                 }
2071         } else {
2072                 /* "Snapshot output "name" successfully deleted
2073                  * for session "current_session_name"
2074                  * Name of the output
2075                  */
2076                 ret = mi_lttng_writer_write_element_string(writer, config_element_name,
2077                                 name);
2078                 if (ret) {
2079                         goto end;
2080                 }
2081         }
2082
2083         /* Snapshot was deleted for session "current_session_name"*/
2084         ret = mi_lttng_writer_write_element_string(writer,
2085                         mi_lttng_element_snapshot_session_name,
2086                         current_session_name);
2087         if (ret) {
2088                 goto end;
2089         }
2090
2091         /* Close snapshot element */
2092         ret = mi_lttng_writer_close_element(writer);
2093
2094 end:
2095         return ret;
2096 }
2097
2098 LTTNG_HIDDEN
2099 int mi_lttng_snapshot_add_output(struct mi_writer *writer,
2100                 const char *current_session_name, const char *n_ptr,
2101                 struct lttng_snapshot_output *output)
2102 {
2103         int ret;
2104
2105         /* Open element snapshot */
2106         ret = mi_lttng_writer_open_element(writer,
2107                         mi_lttng_element_command_snapshot);
2108         if (ret) {
2109                 goto end;
2110         }
2111
2112         /* Snapshot output id */
2113         ret = mi_lttng_writer_write_element_unsigned_int(writer,
2114                         mi_lttng_element_id, output->id);
2115         if (ret) {
2116                 goto end;
2117         }
2118
2119         /* Snapshot output names */
2120         ret = mi_lttng_writer_write_element_string(writer,
2121                         config_element_name, n_ptr);
2122         if (ret) {
2123                 goto end;
2124         }
2125
2126         /* Destination of the output (ctrl_url)*/
2127         ret = mi_lttng_writer_write_element_string(writer,
2128                         mi_lttng_element_snapshot_ctrl_url, output->ctrl_url);
2129         if (ret) {
2130                 goto end;
2131         }
2132
2133         /* Snapshot added for session "current_session_name"*/
2134         ret = mi_lttng_writer_write_element_string(writer,
2135                         mi_lttng_element_snapshot_session_name, current_session_name);
2136         if (ret) {
2137                 goto end;
2138         }
2139
2140         /* total size of all stream combined */
2141         ret = mi_lttng_writer_write_element_unsigned_int(writer,
2142                         mi_lttng_element_snapshot_max_size, output->max_size);
2143         if (ret) {
2144                 goto end;
2145         }
2146
2147         /* Close snapshot element */
2148         ret = mi_lttng_writer_close_element(writer);
2149
2150 end:
2151         return ret;
2152 }
2153
2154 LTTNG_HIDDEN
2155 int mi_lttng_snapshot_record(struct mi_writer *writer,
2156                 const char *current_session_name, const char *url,
2157                 const char *cmdline_ctrl_url, const char *cmdline_data_url)
2158 {
2159         int ret;
2160
2161         /* Open element snapshot */
2162         ret = mi_lttng_writer_open_element(writer,
2163                         mi_lttng_element_command_snapshot);
2164         if (ret) {
2165                 goto end;
2166         }
2167
2168         /*
2169          * If a valid an URL was given, serialize it,
2170          * else take the command line data and ctrl urls*/
2171         if (url) {
2172                 /* Destination of the output (ctrl_url)*/
2173                 ret = mi_lttng_writer_write_element_string(writer,
2174                                 mi_lttng_element_snapshot_ctrl_url, url);
2175                 if (ret) {
2176                         goto end;
2177                 }
2178         } else if (cmdline_ctrl_url) {
2179                 /* Destination of the output (ctrl_url)*/
2180                 ret = mi_lttng_writer_write_element_string(writer,
2181                                 mi_lttng_element_snapshot_ctrl_url, cmdline_ctrl_url);
2182                 if (ret) {
2183                         goto end;
2184                 }
2185
2186                 /* Destination of the output (data_url) */
2187                 ret = mi_lttng_writer_write_element_string(writer,
2188                                 mi_lttng_element_snapshot_data_url, cmdline_data_url);
2189                 if (ret) {
2190                         goto end;
2191                 }
2192         }
2193
2194         /* Close record_snapshot element */
2195         ret = mi_lttng_writer_close_element(writer);
2196
2197 end:
2198         return ret;
2199 }
2200
2201 LTTNG_HIDDEN
2202 int mi_lttng_rotation_schedule(struct mi_writer *writer,
2203                 const struct lttng_rotation_schedule *schedule)
2204 {
2205         int ret = 0;
2206         enum lttng_rotation_status status;
2207         uint64_t value;
2208         const char *element_name;
2209         const char *value_name;
2210         bool empty_schedule = false;
2211
2212         switch (lttng_rotation_schedule_get_type(schedule)) {
2213         case LTTNG_ROTATION_SCHEDULE_TYPE_PERIODIC:
2214                 status = lttng_rotation_schedule_periodic_get_period(schedule,
2215                                 &value);
2216                 element_name = mi_lttng_element_rotation_schedule_periodic;
2217                 value_name = mi_lttng_element_rotation_schedule_periodic_time_us;
2218                 break;
2219         case LTTNG_ROTATION_SCHEDULE_TYPE_SIZE_THRESHOLD:
2220                 status = lttng_rotation_schedule_size_threshold_get_threshold(
2221                                 schedule, &value);
2222                 element_name = mi_lttng_element_rotation_schedule_size_threshold;
2223                 value_name = mi_lttng_element_rotation_schedule_size_threshold_bytes;
2224                 break;
2225         default:
2226                 ret = -1;
2227                 goto end;
2228         }
2229
2230         if (status != LTTNG_ROTATION_STATUS_OK) {
2231                 if (status == LTTNG_ROTATION_STATUS_UNAVAILABLE) {
2232                         empty_schedule = true;
2233                 } else {
2234                         ret = -1;
2235                         goto end;
2236                 }
2237         }
2238
2239         ret = mi_lttng_writer_open_element(writer, element_name);
2240         if (ret) {
2241                 goto end;
2242         }
2243
2244         if (!empty_schedule) {
2245                 ret = mi_lttng_writer_write_element_unsigned_int(writer,
2246                                 value_name, value);
2247                 if (ret) {
2248                         goto end;
2249                 }
2250         }
2251
2252         /* Close schedule descriptor element. */
2253         ret = mi_lttng_writer_close_element(writer);
2254         if (ret) {
2255                 goto end;
2256         }
2257 end:
2258         return ret;
2259 }
2260
2261 LTTNG_HIDDEN
2262 int mi_lttng_rotation_schedule_result(struct mi_writer *writer,
2263                 const struct lttng_rotation_schedule *schedule,
2264                 bool success)
2265 {
2266         int ret = 0;
2267
2268         ret = mi_lttng_writer_open_element(writer,
2269                         mi_lttng_element_rotation_schedule_result);
2270         if (ret) {
2271                 goto end;
2272         }
2273
2274         ret = mi_lttng_writer_open_element(writer,
2275                         mi_lttng_element_rotation_schedule);
2276         if (ret) {
2277                 goto end;
2278         }
2279
2280         ret = mi_lttng_rotation_schedule(writer, schedule);
2281         if (ret) {
2282                 goto end;
2283         }
2284
2285         /* Close rotation_schedule element */
2286         ret = mi_lttng_writer_close_element(writer);
2287         if (ret) {
2288                 goto end;
2289         }
2290
2291         ret = mi_lttng_writer_write_element_bool(writer,
2292                         mi_lttng_element_command_success, success);
2293         if (ret) {
2294                 goto end;
2295         }
2296
2297         /* Close rotation_schedule_result element */
2298         ret = mi_lttng_writer_close_element(writer);
2299         if (ret) {
2300                 goto end;
2301         }
2302 end:
2303         return ret;
2304 }
2305
2306 static
2307 int mi_lttng_location(struct mi_writer *writer,
2308                 const struct lttng_trace_archive_location *location)
2309 {
2310         int ret = 0;
2311         enum lttng_trace_archive_location_type location_type;
2312         enum lttng_trace_archive_location_status status;
2313
2314         location_type = lttng_trace_archive_location_get_type(location);
2315
2316         switch (location_type) {
2317         case LTTNG_TRACE_ARCHIVE_LOCATION_TYPE_LOCAL:
2318         {
2319                 const char *absolute_path;
2320
2321                 status = lttng_trace_archive_location_local_get_absolute_path(
2322                                 location, &absolute_path);
2323                 if (status != LTTNG_TRACE_ARCHIVE_LOCATION_STATUS_OK) {
2324                         ret = -1;
2325                         goto end;
2326                 }
2327
2328                 ret = mi_lttng_writer_open_element(writer,
2329                                 mi_lttng_element_rotation_location_local);
2330                 if (ret) {
2331                         goto end;
2332                 }
2333
2334
2335                 ret = mi_lttng_writer_write_element_string(writer,
2336                                 mi_lttng_element_rotation_location_local_absolute_path,
2337                                 absolute_path);
2338                 if (ret) {
2339                         goto end;
2340                 }
2341
2342                 /* Close local element */
2343                 ret = mi_lttng_writer_close_element(writer);
2344                 if (ret) {
2345                         goto end;
2346                 }
2347                 break;
2348         }
2349         case LTTNG_TRACE_ARCHIVE_LOCATION_TYPE_RELAY:
2350         {
2351                 uint16_t control_port, data_port;
2352                 const char *host, *relative_path;
2353                 enum lttng_trace_archive_location_relay_protocol_type protocol;
2354
2355                 /* Fetch all relay location parameters. */
2356                 status = lttng_trace_archive_location_relay_get_protocol_type(
2357                                 location, &protocol);
2358                 if (status != LTTNG_TRACE_ARCHIVE_LOCATION_STATUS_OK) {
2359                         ret = -1;
2360                         goto end;
2361                 }
2362
2363                 status = lttng_trace_archive_location_relay_get_host(
2364                                 location, &host);
2365                 if (status != LTTNG_TRACE_ARCHIVE_LOCATION_STATUS_OK) {
2366                         ret = -1;
2367                         goto end;
2368                 }
2369
2370                 status = lttng_trace_archive_location_relay_get_control_port(
2371                                 location, &control_port);
2372                 if (status != LTTNG_TRACE_ARCHIVE_LOCATION_STATUS_OK) {
2373                         ret = -1;
2374                         goto end;
2375                 }
2376
2377                 status = lttng_trace_archive_location_relay_get_data_port(
2378                                 location, &data_port);
2379                 if (status != LTTNG_TRACE_ARCHIVE_LOCATION_STATUS_OK) {
2380                         ret = -1;
2381                         goto end;
2382                 }
2383
2384                 status = lttng_trace_archive_location_relay_get_relative_path(
2385                                 location, &relative_path);
2386                 if (status != LTTNG_TRACE_ARCHIVE_LOCATION_STATUS_OK) {
2387                         ret = -1;
2388                         goto end;
2389                 }
2390
2391                 ret = mi_lttng_writer_open_element(writer,
2392                                 mi_lttng_element_rotation_location_relay);
2393                 if (ret) {
2394                         goto end;
2395                 }
2396
2397                 ret = mi_lttng_writer_write_element_string(writer,
2398                                 mi_lttng_element_rotation_location_relay_host,
2399                                 host);
2400                 if (ret) {
2401                         goto end;
2402                 }
2403
2404                 ret = mi_lttng_writer_write_element_unsigned_int(writer,
2405                                 mi_lttng_element_rotation_location_relay_control_port,
2406                                 control_port);
2407                 if (ret) {
2408                         goto end;
2409                 }
2410
2411                 ret = mi_lttng_writer_write_element_unsigned_int(writer,
2412                                 mi_lttng_element_rotation_location_relay_data_port,
2413                                 data_port);
2414                 if (ret) {
2415                         goto end;
2416                 }
2417
2418                 ret = mi_lttng_writer_write_element_string(writer,
2419                                 mi_lttng_element_rotation_location_relay_protocol,
2420                                 mi_lttng_trace_archive_location_relay_protocol_type_string(protocol));
2421                 if (ret) {
2422                         goto end;
2423                 }
2424
2425                 ret = mi_lttng_writer_write_element_string(writer,
2426                                 mi_lttng_element_rotation_location_relay_relative_path,
2427                                 relative_path);
2428                 if (ret) {
2429                         goto end;
2430                 }
2431
2432                 /* Close relay element */
2433                 ret = mi_lttng_writer_close_element(writer);
2434                 if (ret) {
2435                         goto end;
2436                 }
2437                 break;
2438         }
2439         default:
2440                 abort();
2441         }
2442 end:
2443         return ret;
2444 }
2445
2446 LTTNG_HIDDEN
2447 int mi_lttng_rotate(struct mi_writer *writer,
2448                 const char *session_name,
2449                 enum lttng_rotation_state rotation_state,
2450                 const struct lttng_trace_archive_location *location)
2451 {
2452         int ret;
2453
2454         ret = mi_lttng_writer_open_element(writer,
2455                         mi_lttng_element_rotation);
2456         if (ret) {
2457                 goto end;
2458         }
2459
2460         ret = mi_lttng_writer_write_element_string(writer,
2461                         mi_lttng_element_session_name,
2462                         session_name);
2463         if (ret) {
2464                 goto end;
2465         }
2466
2467         ret = mi_lttng_writer_write_element_string(writer,
2468                         mi_lttng_element_rotation_state,
2469                         mi_lttng_rotation_state_string(rotation_state));
2470         if (ret) {
2471                 goto end;
2472         }
2473
2474         if (!location) {
2475                 /* Not a serialization error. */
2476                 goto close_rotation;
2477         }
2478
2479         ret = mi_lttng_writer_open_element(writer,
2480                         mi_lttng_element_rotation_location);
2481         if (ret) {
2482                 goto end;
2483         }
2484
2485         ret = mi_lttng_location(writer, location);
2486         if (ret) {
2487                 goto close_location;
2488         }
2489
2490 close_location:
2491         /* Close location element */
2492         ret = mi_lttng_writer_close_element(writer);
2493         if (ret) {
2494                 goto end;
2495         }
2496
2497 close_rotation:
2498         /* Close rotation element */
2499         ret = mi_lttng_writer_close_element(writer);
2500         if (ret) {
2501                 goto end;
2502         }
2503 end:
2504         return ret;
2505 }