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