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         case LTTNG_EVENT_CONTEXT_CGROUP_NS:
 432                 return config_event_context_cgroup_ns;
 433         case LTTNG_EVENT_CONTEXT_IPC_NS:
 434                 return config_event_context_ipc_ns;
 435         case LTTNG_EVENT_CONTEXT_MNT_NS:
 436                 return config_event_context_mnt_ns;
 437         case LTTNG_EVENT_CONTEXT_NET_NS:
 438                 return config_event_context_net_ns;
 439         case LTTNG_EVENT_CONTEXT_PID_NS:
 440                 return config_event_context_pid_ns;
 441         case LTTNG_EVENT_CONTEXT_USER_NS:
 442                 return config_event_context_user_ns;
 443         case LTTNG_EVENT_CONTEXT_UTS_NS:
 444                 return config_event_context_uts_ns;
 445         case LTTNG_EVENT_CONTEXT_UID:
 446                 return config_event_context_uid;
 447         case LTTNG_EVENT_CONTEXT_EUID:
 448                 return config_event_context_euid;
 449         case LTTNG_EVENT_CONTEXT_SUID:
 450                 return config_event_context_suid;
 451         case LTTNG_EVENT_CONTEXT_GID:
 452                 return config_event_context_gid;
 453         case LTTNG_EVENT_CONTEXT_EGID:
 454                 return config_event_context_egid;
 455         case LTTNG_EVENT_CONTEXT_SGID:
 456                 return config_event_context_sgid;
 457         case LTTNG_EVENT_CONTEXT_VUID:
 458                 return config_event_context_vuid;
 459         case LTTNG_EVENT_CONTEXT_VEUID:
 460                 return config_event_context_veuid;
 461         case LTTNG_EVENT_CONTEXT_VSUID:
 462                 return config_event_context_vsuid;
 463         case LTTNG_EVENT_CONTEXT_VGID:
 464                 return config_event_context_vgid;
 465         case LTTNG_EVENT_CONTEXT_VEGID:
 466                 return config_event_context_vegid;
 467         case LTTNG_EVENT_CONTEXT_VSGID:
 468                 return config_event_context_vsgid;
 469         default:
 470                 return NULL;
 471         }
 472 }
 473
 474 LTTNG_HIDDEN
 475 const char *mi_lttng_eventfieldtype_string(enum lttng_event_field_type val)
 476 {
 477         switch (val) {
 478         case(LTTNG_EVENT_FIELD_INTEGER):
 479                 return mi_lttng_element_type_integer;
 480         case(LTTNG_EVENT_FIELD_ENUM):
 481                 return mi_lttng_element_type_enum;
 482         case(LTTNG_EVENT_FIELD_FLOAT):
 483                 return mi_lttng_element_type_float;
 484         case(LTTNG_EVENT_FIELD_STRING):
 485                 return mi_lttng_element_type_string;
 486         default:
 487                 return mi_lttng_element_type_other;
 488         }
 489 }
 490
 491 LTTNG_HIDDEN
 492 const char *mi_lttng_domaintype_string(enum lttng_domain_type value)
 493 {
 494         /* Note: This is a *duplicate* of get_domain_str from bin/lttng/utils.c */
 495         switch (value) {
 496         case LTTNG_DOMAIN_KERNEL:
 497                 return config_domain_type_kernel;
 498         case LTTNG_DOMAIN_UST:
 499                 return config_domain_type_ust;
 500         case LTTNG_DOMAIN_JUL:
 501                 return config_domain_type_jul;
 502         case LTTNG_DOMAIN_LOG4J:
 503                 return config_domain_type_log4j;
 504         case LTTNG_DOMAIN_PYTHON:
 505                 return config_domain_type_python;
 506         default:
 507                 /* Should not have an unknown domain */
 508                 assert(0);
 509                 return NULL;
 510         }
 511 }
 512
 513 LTTNG_HIDDEN
 514 const char *mi_lttng_buffertype_string(enum lttng_buffer_type value)
 515 {
 516         switch (value) {
 517         case LTTNG_BUFFER_PER_PID:
 518                 return config_buffer_type_per_pid;
 519         case LTTNG_BUFFER_PER_UID:
 520                 return config_buffer_type_per_uid;
 521         case LTTNG_BUFFER_GLOBAL:
 522                 return config_buffer_type_global;
 523         default:
 524                 /* Should not have an unknow buffer type */
 525                 assert(0);
 526                 return NULL;
 527         }
 528 }
 529
 530 LTTNG_HIDDEN
 531 const char *mi_lttng_rotation_state_string(enum lttng_rotation_state value)
 532 {
 533         switch (value) {
 534         case LTTNG_ROTATION_STATE_ONGOING:
 535                 return mi_lttng_rotation_state_str_ongoing;
 536         case LTTNG_ROTATION_STATE_COMPLETED:
 537                 return mi_lttng_rotation_state_str_completed;
 538         case LTTNG_ROTATION_STATE_EXPIRED:
 539                 return mi_lttng_rotation_state_str_expired;
 540         case LTTNG_ROTATION_STATE_ERROR:
 541                 return mi_lttng_rotation_state_str_error;
 542         default:
 543                 /* Should not have an unknow rotation state. */
 544                 assert(0);
 545                 return NULL;
 546         }
 547 }
 548
 549 LTTNG_HIDDEN
 550 const char *mi_lttng_trace_archive_location_relay_protocol_type_string(
 551                 enum lttng_trace_archive_location_relay_protocol_type value)
 552 {
 553         switch (value) {
 554         case LTTNG_TRACE_ARCHIVE_LOCATION_RELAY_PROTOCOL_TYPE_TCP:
 555                 return mi_lttng_rotation_location_relay_protocol_str_tcp;
 556         default:
 557                 /* Should not have an unknow relay protocol. */
 558                 assert(0);
 559                 return NULL;
 560         }
 561 }
 562
 563 LTTNG_HIDDEN
 564 struct mi_writer *mi_lttng_writer_create(int fd_output, int mi_output_type)
 565 {
 566         struct mi_writer *mi_writer;
 567
 568         mi_writer = zmalloc(sizeof(struct mi_writer));
 569         if (!mi_writer) {
 570                 PERROR("zmalloc mi_writer_create");
 571                 goto end;
 572         }
 573         if (mi_output_type == LTTNG_MI_XML) {
 574                 mi_writer->writer = config_writer_create(fd_output, 0);
 575                 if (!mi_writer->writer) {
 576                         goto err_destroy;
 577                 }
 578                 mi_writer->type = LTTNG_MI_XML;
 579         } else {
 580                 goto err_destroy;
 581         }
 582
 583 end:
 584         return mi_writer;
 585
 586 err_destroy:
 587         free(mi_writer);
 588         return NULL;
 589 }
 590
 591 LTTNG_HIDDEN
 592 int mi_lttng_writer_destroy(struct mi_writer *writer)
 593 {
 594         int ret;
 595
 596         if (!writer) {
 597                 ret = -EINVAL;
 598                 goto end;
 599         }
 600
 601         ret = config_writer_destroy(writer->writer);
 602         if (ret < 0) {
 603                 goto end;
 604         }
 605
 606         free(writer);
 607 end:
 608         return ret;
 609 }
 610
 611 LTTNG_HIDDEN
 612 int mi_lttng_writer_command_open(struct mi_writer *writer, const char *command)
 613 {
 614         int ret;
 615
 616         /*
 617          * A command is always the MI's root node, it must declare the current
 618          * namespace and schema URIs and the schema's version.
 619          */
 620         ret = config_writer_open_element(writer->writer,
 621                         mi_lttng_element_command);
 622         if (ret) {
 623                 goto end;
 624         }
 625
 626         ret = config_writer_write_attribute(writer->writer,
 627                         mi_lttng_xmlns, DEFAULT_LTTNG_MI_NAMESPACE);
 628         if (ret) {
 629                 goto end;
 630         }
 631
 632         ret = config_writer_write_attribute(writer->writer,
 633                         mi_lttng_xmlns_xsi, mi_lttng_w3_schema_uri);
 634         if (ret) {
 635                 goto end;
 636         }
 637
 638         ret = config_writer_write_attribute(writer->writer,
 639                         mi_lttng_schema_location,
 640                         mi_lttng_schema_location_uri);
 641         if (ret) {
 642                 goto end;
 643         }
 644
 645         ret = config_writer_write_attribute(writer->writer,
 646                         mi_lttng_schema_version,
 647                         mi_lttng_schema_version_value);
 648         if (ret) {
 649                 goto end;
 650         }
 651
 652         ret = mi_lttng_writer_write_element_string(writer,
 653                         mi_lttng_element_command_name, command);
 654 end:
 655         return ret;
 656 }
 657
 658 LTTNG_HIDDEN
 659 int mi_lttng_writer_command_close(struct mi_writer *writer)
 660 {
 661         return mi_lttng_writer_close_element(writer);
 662 }
 663
 664 LTTNG_HIDDEN
 665 int mi_lttng_writer_open_element(struct mi_writer *writer,
 666                 const char *element_name)
 667 {
 668         return config_writer_open_element(writer->writer, element_name);
 669 }
 670
 671 LTTNG_HIDDEN
 672 int mi_lttng_writer_close_element(struct mi_writer *writer)
 673 {
 674         return config_writer_close_element(writer->writer);
 675 }
 676
 677 LTTNG_HIDDEN
 678 int mi_lttng_close_multi_element(struct mi_writer *writer,
 679                 unsigned int nb_element)
 680 {
 681         int ret, i;
 682
 683         if (nb_element < 1) {
 684                 ret = 0;
 685                 goto end;
 686         }
 687         for (i = 0; i < nb_element; i++) {
 688                 ret = mi_lttng_writer_close_element(writer);
 689                 if (ret) {
 690                         goto end;
 691                 }
 692         }
 693 end:
 694         return ret;
 695 }
 696
 697 LTTNG_HIDDEN
 698 int mi_lttng_writer_write_element_unsigned_int(struct mi_writer *writer,
 699                 const char *element_name, uint64_t value)
 700 {
 701         return config_writer_write_element_unsigned_int(writer->writer,
 702                         element_name, value);
 703 }
 704
 705 LTTNG_HIDDEN
 706 int mi_lttng_writer_write_element_signed_int(struct mi_writer *writer,
 707                 const char *element_name, int64_t value)
 708 {
 709         return config_writer_write_element_signed_int(writer->writer,
 710                         element_name, value);
 711 }
 712
 713 LTTNG_HIDDEN
 714 int mi_lttng_writer_write_element_bool(struct mi_writer *writer,
 715                 const char *element_name, int value)
 716 {
 717         return config_writer_write_element_bool(writer->writer,
 718                         element_name, value);
 719 }
 720
 721 LTTNG_HIDDEN
 722 int mi_lttng_writer_write_element_string(struct mi_writer *writer,
 723                 const char *element_name, const char *value)
 724 {
 725         return config_writer_write_element_string(writer->writer,
 726                         element_name, value);
 727 }
 728
 729 LTTNG_HIDDEN
 730 int mi_lttng_version(struct mi_writer *writer, struct mi_lttng_version *version,
 731         const char *lttng_description, const char *lttng_license)
 732 {
 733         int ret;
 734
 735         /* Open version */
 736         ret = mi_lttng_writer_open_element(writer, mi_lttng_element_version);
 737         if (ret) {
 738                 goto end;
 739         }
 740
 741         /* Version string (contain info like rc etc.) */
 742         ret = mi_lttng_writer_write_element_string(writer,
 743                         mi_lttng_element_version_str, version->version);
 744         if (ret) {
 745                 goto end;
 746         }
 747
 748         /* Major version number */
 749         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 750                         mi_lttng_element_version_major, version->version_major);
 751         if (ret) {
 752                 goto end;
 753         }
 754
 755         /* Minor version number */
 756         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 757                         mi_lttng_element_version_minor, version->version_minor);
 758         if (ret) {
 759                 goto end;
 760         }
 761
 762         /* Commit version number */
 763         ret = mi_lttng_writer_write_element_string(writer,
 764                         mi_lttng_element_version_commit, version->version_commit);
 765         if (ret) {
 766                 goto end;
 767         }
 768
 769         /* Patch number */
 770         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 771                         mi_lttng_element_version_patch_level, version->version_patchlevel);
 772         if (ret) {
 773                 goto end;
 774         }
 775
 776         /* Name of the version */
 777         ret = mi_lttng_writer_write_element_string(writer,
 778                         config_element_name, version->version_name);
 779         if (ret) {
 780                 goto end;
 781         }
 782
 783         /* Description mostly related to beer... */
 784         ret = mi_lttng_writer_write_element_string(writer,
 785                         mi_lttng_element_version_description, lttng_description);
 786         if (ret) {
 787                 goto end;
 788         }
 789
 790         /* url */
 791         ret = mi_lttng_writer_write_element_string(writer,
 792                         mi_lttng_element_version_web, version->package_url);
 793         if (ret) {
 794                 goto end;
 795         }
 796
 797         /* License: free as in free beer...no...*speech* */
 798         ret = mi_lttng_writer_write_element_string(writer,
 799                         mi_lttng_element_version_license, lttng_license);
 800         if (ret) {
 801                 goto end;
 802         }
 803
 804         /* Close version element */
 805         ret = mi_lttng_writer_close_element(writer);
 806
 807 end:
 808         return ret;
 809 }
 810
 811 LTTNG_HIDDEN
 812 int mi_lttng_sessions_open(struct mi_writer *writer)
 813 {
 814         return mi_lttng_writer_open_element(writer, config_element_sessions);
 815 }
 816
 817 LTTNG_HIDDEN
 818 int mi_lttng_session(struct mi_writer *writer,
 819                 struct lttng_session *session, int is_open)
 820 {
 821         int ret;
 822
 823         assert(session);
 824
 825         /* Open sessions element */
 826         ret = mi_lttng_writer_open_element(writer,
 827                         config_element_session);
 828         if (ret) {
 829                 goto end;
 830         }
 831
 832         /* Name of the session */
 833         ret = mi_lttng_writer_write_element_string(writer,
 834                         config_element_name, session->name);
 835         if (ret) {
 836                 goto end;
 837         }
 838
 839         /* Path */
 840         ret = mi_lttng_writer_write_element_string(writer,
 841                         config_element_path, session->path);
 842         if (ret) {
 843                 goto end;
 844         }
 845
 846         /* Enabled ? */
 847         ret = mi_lttng_writer_write_element_bool(writer,
 848                         config_element_enabled, session->enabled);
 849         if (ret) {
 850                 goto end;
 851         }
 852
 853         /* Snapshot mode */
 854         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 855                         config_element_snapshot_mode, session->snapshot_mode);
 856         if (ret) {
 857                 goto end;
 858         }
 859
 860         /* Live timer interval in usec */
 861         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 862                         config_element_live_timer_interval,
 863                         session->live_timer_interval);
 864         if (ret) {
 865                 goto end;
 866         }
 867
 868         if (!is_open) {
 869                 /* Closing session element */
 870                 ret = mi_lttng_writer_close_element(writer);
 871         }
 872 end:
 873         return ret;
 874
 875 }
 876
 877 LTTNG_HIDDEN
 878 int mi_lttng_domains_open(struct mi_writer *writer)
 879 {
 880         return mi_lttng_writer_open_element(writer, config_element_domains);
 881 }
 882
 883 LTTNG_HIDDEN
 884 int mi_lttng_domain(struct mi_writer *writer,
 885                 struct lttng_domain *domain, int is_open)
 886 {
 887         int ret = 0;
 888         const char *str_domain;
 889         const char *str_buffer;
 890
 891         assert(domain);
 892
 893         /* Open domain element */
 894         ret = mi_lttng_writer_open_element(writer, config_element_domain);
 895         if (ret) {
 896                 goto end;
 897         }
 898
 899         /* Domain Type */
 900         str_domain = mi_lttng_domaintype_string(domain->type);
 901         ret = mi_lttng_writer_write_element_string(writer, config_element_type,
 902                         str_domain);
 903         if (ret) {
 904                 goto end;
 905         }
 906
 907         /* Buffer Type */
 908         str_buffer= mi_lttng_buffertype_string(domain->buf_type);
 909         ret = mi_lttng_writer_write_element_string(writer,
 910                         config_element_buffer_type, str_buffer);
 911         if (ret) {
 912                 goto end;
 913         }
 914
 915         /* TODO: union  attr
 916          * This union is not currently used and was added for
 917          * future ust domain support.
 918          * Date: 25-06-2014
 919          * */
 920
 921         if (!is_open) {
 922                 /* Closing domain element */
 923                 ret = mi_lttng_writer_close_element(writer);
 924         }
 925
 926 end:
 927         return ret;
 928
 929 }
 930
 931 LTTNG_HIDDEN
 932 int mi_lttng_channels_open(struct mi_writer *writer)
 933 {
 934         return mi_lttng_writer_open_element(writer, config_element_channels);
 935 }
 936
 937 LTTNG_HIDDEN
 938 int mi_lttng_channel(struct mi_writer *writer,
 939                 struct lttng_channel *channel, int is_open)
 940 {
 941         int ret = 0;
 942
 943         assert(channel);
 944
 945         /* Opening channel element */
 946         ret = mi_lttng_writer_open_element(writer, config_element_channel);
 947         if (ret) {
 948                 goto end;
 949         }
 950
 951         /* Name */
 952         ret = mi_lttng_writer_write_element_string(writer, config_element_name,
 953                         channel->name);
 954         if (ret) {
 955                 goto end;
 956         }
 957
 958         /* Enabled ? */
 959         ret = mi_lttng_writer_write_element_bool(writer,
 960                         config_element_enabled, channel->enabled);
 961         if (ret) {
 962                 goto end;
 963         }
 964
 965         /* Attribute */
 966         ret = mi_lttng_channel_attr(writer, &channel->attr);
 967         if (ret) {
 968                 goto end;
 969         }
 970
 971         if (!is_open) {
 972                 /* Closing channel element */
 973                 ret = mi_lttng_writer_close_element(writer);
 974                 if (ret) {
 975                         goto end;
 976                 }
 977         }
 978 end:
 979         return ret;
 980 }
 981
 982 LTTNG_HIDDEN
 983 int mi_lttng_channel_attr(struct mi_writer *writer,
 984                 struct lttng_channel_attr *attr)
 985 {
 986         int ret = 0;
 987         struct lttng_channel *chan = caa_container_of(attr,
 988                         struct lttng_channel, attr);
 989         uint64_t discarded_events, lost_packets, monitor_timer_interval;
 990         int64_t blocking_timeout;
 991
 992         assert(attr);
 993
 994         ret = lttng_channel_get_discarded_event_count(chan, &discarded_events);
 995         if (ret) {
 996                 goto end;
 997         }
 998
 999         ret = lttng_channel_get_lost_packet_count(chan, &lost_packets);
1000         if (ret) {
1001                 goto end;
1002         }
1003
1004         ret = lttng_channel_get_monitor_timer_interval(chan,
1005                         &monitor_timer_interval);
1006         if (ret) {
1007                 goto end;
1008         }
1009
1010         ret = lttng_channel_get_blocking_timeout(chan,
1011                         &blocking_timeout);
1012         if (ret) {
1013                 goto end;
1014         }
1015
1016         /* Opening Attributes */
1017         ret = mi_lttng_writer_open_element(writer, config_element_attributes);
1018         if (ret) {
1019                 goto end;
1020         }
1021
1022         /* Overwrite */
1023         ret = mi_lttng_writer_write_element_string(writer,
1024                 config_element_overwrite_mode,
1025                 attr->overwrite ? config_overwrite_mode_overwrite :
1026                         config_overwrite_mode_discard);
1027         if (ret) {
1028                 goto end;
1029         }
1030
1031         /* Sub buffer size in byte */
1032         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1033                 config_element_subbuf_size, attr->subbuf_size);
1034         if (ret) {
1035                 goto end;
1036         }
1037
1038         /* Number of subbuffer (power of two) */
1039         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1040                 config_element_num_subbuf,
1041                 attr->num_subbuf);
1042         if (ret) {
1043                 goto end;
1044         }
1045
1046         /* Switch timer interval in usec */
1047         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1048                 config_element_switch_timer_interval,
1049                 attr->switch_timer_interval);
1050         if (ret) {
1051                 goto end;
1052         }
1053
1054         /* Read timer interval in usec */
1055         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1056                 config_element_read_timer_interval,
1057                 attr->read_timer_interval);
1058         if (ret) {
1059                 goto end;
1060         }
1061
1062         /* Monitor timer interval in usec */
1063         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1064                 config_element_monitor_timer_interval,
1065                 monitor_timer_interval);
1066         if (ret) {
1067                 goto end;
1068         }
1069
1070         /* Retry timeout in usec */
1071         ret = mi_lttng_writer_write_element_signed_int(writer,
1072                 config_element_blocking_timeout,
1073                 blocking_timeout);
1074         if (ret) {
1075                 goto end;
1076         }
1077
1078         /* Event output */
1079         ret = mi_lttng_writer_write_element_string(writer,
1080                 config_element_output_type,
1081                 attr->output == LTTNG_EVENT_SPLICE ?
1082                 config_output_type_splice : config_output_type_mmap);
1083         if (ret) {
1084                 goto end;
1085         }
1086
1087         /* Tracefile size in bytes */
1088         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1089                 config_element_tracefile_size, attr->tracefile_size);
1090         if (ret) {
1091                 goto end;
1092         }
1093
1094         /* Count of tracefiles */
1095         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1096                 config_element_tracefile_count,
1097                 attr->tracefile_count);
1098         if (ret) {
1099                 goto end;
1100         }
1101
1102         /* Live timer interval in usec*/
1103         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1104                 config_element_live_timer_interval,
1105                 attr->live_timer_interval);
1106         if (ret) {
1107                 goto end;
1108         }
1109
1110         /* Discarded events */
1111         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1112                 config_element_discarded_events,
1113                 discarded_events);
1114         if (ret) {
1115                 goto end;
1116         }
1117
1118         /* Lost packets */
1119         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1120                 config_element_lost_packets,
1121                 lost_packets);
1122         if (ret) {
1123                 goto end;
1124         }
1125
1126         /* Closing attributes */
1127         ret = mi_lttng_writer_close_element(writer);
1128         if (ret) {
1129                 goto end;
1130         }
1131 end:
1132         return ret;
1133
1134 }
1135
1136 LTTNG_HIDDEN
1137 int mi_lttng_event_common_attributes(struct mi_writer *writer,
1138                 struct lttng_event *event)
1139 {
1140         int ret;
1141         const char *filter_expression;
1142
1143         /* Open event element */
1144         ret = mi_lttng_writer_open_element(writer, config_element_event);
1145         if (ret) {
1146                 goto end;
1147         }
1148
1149         /* Event name */
1150         ret = mi_lttng_writer_write_element_string(writer,
1151                         config_element_name, event->name);
1152         if (ret) {
1153                 goto end;
1154         }
1155
1156         /* Event type */
1157         ret = mi_lttng_writer_write_element_string(writer,
1158                         config_element_type, mi_lttng_eventtype_string(event->type));
1159         if (ret) {
1160                 goto end;
1161         }
1162
1163         /* Is event enabled */
1164         ret = mi_lttng_writer_write_element_bool(writer,
1165                         config_element_enabled, event->enabled);
1166         if (ret) {
1167                 goto end;
1168         }
1169
1170         /* Event filter expression */
1171         ret = lttng_event_get_filter_expression(event, &filter_expression);
1172         if (ret) {
1173                 goto end;
1174         }
1175
1176         if (filter_expression) {
1177                 ret = mi_lttng_writer_write_element_string(writer,
1178                                 config_element_filter_expression,
1179                                 filter_expression);
1180                 if (ret) {
1181                         goto end;
1182                 }
1183         }
1184
1185 end:
1186         return ret;
1187 }
1188
1189 static int write_event_exclusions(struct mi_writer *writer,
1190                 struct lttng_event *event)
1191 {
1192         int i;
1193         int ret;
1194         int exclusion_count;
1195
1196         /* Open event exclusions */
1197         ret = mi_lttng_writer_open_element(writer, config_element_exclusions);
1198         if (ret) {
1199                 goto end;
1200         }
1201
1202         exclusion_count = lttng_event_get_exclusion_name_count(event);
1203         if (exclusion_count < 0) {
1204                 ret = exclusion_count;
1205                 goto end;
1206         }
1207
1208         for (i = 0; i < exclusion_count; i++) {
1209                 const char *name;
1210
1211                 ret = lttng_event_get_exclusion_name(event, i, &name);
1212                 if (ret) {
1213                         /* Close exclusions */
1214                         mi_lttng_writer_close_element(writer);
1215                         goto end;
1216                 }
1217
1218                 ret = mi_lttng_writer_write_element_string(writer,
1219                                 config_element_exclusion, name);
1220                 if (ret) {
1221                         /* Close exclusions */
1222                         mi_lttng_writer_close_element(writer);
1223                         goto end;
1224                 }
1225         }
1226
1227         /* Close exclusions */
1228         ret = mi_lttng_writer_close_element(writer);
1229
1230 end:
1231         return ret;
1232 }
1233
1234 LTTNG_HIDDEN
1235 int mi_lttng_event_tracepoint_loglevel(struct mi_writer *writer,
1236                 struct lttng_event *event, enum lttng_domain_type domain)
1237 {
1238         int ret;
1239
1240         /* Event loglevel */
1241         ret = mi_lttng_writer_write_element_string(writer,
1242                         config_element_loglevel,
1243                         mi_lttng_loglevel_string(event->loglevel, domain));
1244         if (ret) {
1245                 goto end;
1246         }
1247
1248         /* Log level type */
1249         ret = mi_lttng_writer_write_element_string(writer,
1250                         config_element_loglevel_type,
1251                         mi_lttng_logleveltype_string(event->loglevel_type));
1252         if (ret) {
1253                 goto end;
1254         }
1255
1256         /* Event exclusions */
1257         ret = write_event_exclusions(writer, event);
1258
1259 end:
1260         return ret;
1261 }
1262
1263 LTTNG_HIDDEN
1264 int mi_lttng_event_tracepoint_no_loglevel(struct mi_writer *writer,
1265                 struct lttng_event *event)
1266 {
1267         /* event exclusion filter */
1268         return write_event_exclusions(writer, event);
1269 }
1270
1271 LTTNG_HIDDEN
1272 int mi_lttng_event_function_probe(struct mi_writer *writer,
1273                 struct lttng_event *event)
1274 {
1275         int ret;
1276
1277         ret = mi_lttng_writer_open_element(writer, config_element_attributes);
1278         if (ret) {
1279                 goto end;
1280         }
1281
1282         ret = mi_lttng_writer_open_element(writer, config_element_probe_attributes);
1283         if (ret) {
1284                 goto end;
1285         }
1286
1287         if (event->attr.probe.addr != 0) {
1288                 /* event probe address */
1289                 ret = mi_lttng_writer_write_element_unsigned_int(writer,
1290                                 config_element_address, event->attr.probe.addr);
1291                 if (ret) {
1292                         goto end;
1293                 }
1294         } else {
1295                 /* event probe offset */
1296                 ret = mi_lttng_writer_write_element_unsigned_int(writer,
1297                                 config_element_offset, event->attr.probe.offset);
1298                 if (ret) {
1299                         goto end;
1300                 }
1301
1302                 /* event probe symbol_name */
1303                 ret = mi_lttng_writer_write_element_string(writer,
1304                                 config_element_symbol_name, event->attr.probe.symbol_name);
1305                 if (ret) {
1306                         goto end;
1307                 }
1308         }
1309
1310         /* Close probe_attributes and attributes */
1311         ret = mi_lttng_close_multi_element(writer, 2);
1312 end:
1313         return ret;
1314 }
1315
1316 LTTNG_HIDDEN
1317 int mi_lttng_event_userspace_probe(struct mi_writer *writer,
1318                 struct lttng_event *event)
1319 {
1320         int ret;
1321         const struct lttng_userspace_probe_location *location;
1322         const struct lttng_userspace_probe_location_lookup_method *lookup_method;
1323         enum lttng_userspace_probe_location_lookup_method_type lookup_type;
1324
1325         location = lttng_event_get_userspace_probe_location(event);
1326         if (!location) {
1327                 ret = -LTTNG_ERR_INVALID;
1328                 goto end;
1329         }
1330
1331         lookup_method = lttng_userspace_probe_location_get_lookup_method(location);
1332         if (!lookup_method) {
1333                 ret = -LTTNG_ERR_INVALID;
1334                 goto end;
1335         }
1336
1337         lookup_type = lttng_userspace_probe_location_lookup_method_get_type(lookup_method);
1338
1339         ret = mi_lttng_writer_open_element(writer, config_element_attributes);
1340         if (ret) {
1341                 goto end;
1342         }
1343
1344         switch (lttng_userspace_probe_location_get_type(location)) {
1345         case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION:
1346         {
1347                 const char *function_name;
1348                 const char *binary_path;
1349
1350                 ret = mi_lttng_writer_open_element(writer,
1351                                 config_element_userspace_probe_function_attributes);
1352                 if (ret) {
1353                         goto end;
1354                 }
1355
1356                 switch (lookup_type) {
1357                 case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF:
1358                         ret = mi_lttng_writer_write_element_string(writer,
1359                                         config_element_userspace_probe_lookup,
1360                                         config_element_userspace_probe_lookup_function_elf);
1361                         if (ret) {
1362                                 goto end;
1363                         }
1364                         break;
1365                 case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_DEFAULT:
1366                         ret = mi_lttng_writer_write_element_string(writer,
1367                                         config_element_userspace_probe_lookup,
1368                                         config_element_userspace_probe_lookup_function_default);
1369                         if (ret) {
1370                                 goto end;
1371                         }
1372                         break;
1373                 default:
1374                         goto end;
1375                 }
1376
1377                 binary_path = lttng_userspace_probe_location_function_get_binary_path(location);
1378                 ret = mi_lttng_writer_write_element_string(writer,
1379                                 config_element_userspace_probe_location_binary_path, binary_path);
1380                 if (ret) {
1381                         goto end;
1382                 }
1383
1384                 function_name = lttng_userspace_probe_location_function_get_function_name(location);
1385                 ret = mi_lttng_writer_write_element_string(writer,
1386                                 config_element_userspace_probe_function_location_function_name,
1387                                 function_name);
1388                 if (ret) {
1389                         goto end;
1390                 }
1391
1392                 break;
1393         }
1394         case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT:
1395         {
1396                 const char *probe_name, *provider_name;
1397                 const char *binary_path;
1398
1399                 ret = mi_lttng_writer_open_element(writer,
1400                                 config_element_userspace_probe_function_attributes);
1401                 if (ret) {
1402                         goto end;
1403                 }
1404
1405                 switch (lookup_type) {
1406                 case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT:
1407                         ret = mi_lttng_writer_write_element_string(writer,
1408                                         config_element_userspace_probe_lookup,
1409                                         config_element_userspace_probe_lookup_tracepoint_sdt);
1410                         if (ret) {
1411                                 goto end;
1412                         }
1413                         break;
1414                 default:
1415                         goto end;
1416                 }
1417
1418                 binary_path = lttng_userspace_probe_location_tracepoint_get_binary_path(location);
1419                 ret = mi_lttng_writer_write_element_string(writer,
1420                                 config_element_userspace_probe_location_binary_path,
1421                                 binary_path);
1422                 if (ret) {
1423                         goto end;
1424                 }
1425
1426                 provider_name = lttng_userspace_probe_location_tracepoint_get_provider_name(location);
1427                 ret = mi_lttng_writer_write_element_string(writer,
1428                                 config_element_userspace_probe_tracepoint_location_provider_name,
1429                                 provider_name);
1430                 if (ret) {
1431                         goto end;
1432                 }
1433
1434                 probe_name = lttng_userspace_probe_location_tracepoint_get_probe_name(location);
1435                 ret = mi_lttng_writer_write_element_string(writer,
1436                                 config_element_userspace_probe_tracepoint_location_probe_name, probe_name);
1437                 if (ret) {
1438                         goto end;
1439                 }
1440                 break;
1441         }
1442         default:
1443                 ERR("Invalid probe type encountered");
1444         }
1445         /* Close probe_attributes and attributes */
1446         ret = mi_lttng_close_multi_element(writer, 2);
1447 end:
1448         return ret;
1449 }
1450
1451 LTTNG_HIDDEN
1452 int mi_lttng_event_function_entry(struct mi_writer *writer,
1453                 struct lttng_event *event)
1454 {
1455         int ret;
1456
1457         ret = mi_lttng_writer_open_element(writer, config_element_attributes);
1458         if (ret) {
1459                 goto end;
1460         }
1461
1462         ret = mi_lttng_writer_open_element(writer, config_element_probe_attributes);
1463         if (ret) {
1464                 goto end;
1465         }
1466
1467         /* event probe symbol_name */
1468         ret = mi_lttng_writer_write_element_string(writer,
1469                         config_element_symbol_name, event->attr.ftrace.symbol_name);
1470         if (ret) {
1471                 goto end;
1472         }
1473
1474         /* Close function_attributes and attributes */
1475         ret = mi_lttng_close_multi_element(writer, 2);
1476 end:
1477         return ret;
1478 }
1479
1480 LTTNG_HIDDEN
1481 int mi_lttng_events_open(struct mi_writer *writer)
1482 {
1483         return mi_lttng_writer_open_element(writer, config_element_events);
1484 }
1485
1486 LTTNG_HIDDEN
1487 int mi_lttng_event(struct mi_writer *writer,
1488                 struct lttng_event *event, int is_open, enum lttng_domain_type domain)
1489 {
1490         int ret;
1491
1492         ret = mi_lttng_event_common_attributes(writer, event);
1493         if (ret) {
1494                 goto end;
1495         }
1496
1497         switch (event->type) {
1498         case LTTNG_EVENT_TRACEPOINT:
1499         {
1500                 if (event->loglevel != -1) {
1501                         ret = mi_lttng_event_tracepoint_loglevel(writer, event, domain);
1502                 } else {
1503                         ret = mi_lttng_event_tracepoint_no_loglevel(writer, event);
1504                 }
1505                 break;
1506         }
1507         case LTTNG_EVENT_FUNCTION:
1508                 /* Fallthrough */
1509         case LTTNG_EVENT_PROBE:
1510                 ret = mi_lttng_event_function_probe(writer, event);
1511                 break;
1512         case LTTNG_EVENT_FUNCTION_ENTRY:
1513                 ret = mi_lttng_event_function_entry(writer, event);
1514                 break;
1515         case LTTNG_EVENT_USERSPACE_PROBE:
1516                 ret = mi_lttng_event_userspace_probe(writer, event);
1517                 break;
1518         case LTTNG_EVENT_ALL:
1519                 /* Fallthrough */
1520         default:
1521                 break;
1522         }
1523
1524         if (ret) {
1525                 goto end;
1526         }
1527
1528         if (!is_open) {
1529                 ret = mi_lttng_writer_close_element(writer);
1530         }
1531
1532 end:
1533         return ret;
1534 }
1535
1536 LTTNG_HIDDEN
1537 int mi_lttng_trackers_open(struct mi_writer *writer)
1538 {
1539         return mi_lttng_writer_open_element(writer, config_element_trackers);
1540 }
1541
1542 LTTNG_HIDDEN
1543 int mi_lttng_pid_tracker_open(struct mi_writer *writer)
1544 {
1545         int ret;
1546
1547         /* Open element pid_tracker */
1548         ret = mi_lttng_writer_open_element(writer, config_element_pid_tracker);
1549         if (ret) {
1550                 goto end;
1551         }
1552
1553         /* Open targets element */
1554         ret = mi_lttng_targets_open(writer);
1555 end:
1556         return ret;
1557 }
1558
1559 LTTNG_HIDDEN
1560 int mi_lttng_pids_open(struct mi_writer *writer)
1561 {
1562         return mi_lttng_writer_open_element(writer, config_element_pids);
1563 }
1564
1565 /*
1566  * TODO: move the listing of pid for user agent to process semantic on
1567  * mi api bump. The use of process element break the mi api.
1568  */
1569 LTTNG_HIDDEN
1570 int mi_lttng_pid(struct mi_writer *writer, pid_t pid , const char *name,
1571                 int is_open)
1572 {
1573         int ret;
1574
1575         /* Open pid process */
1576         ret = mi_lttng_writer_open_element(writer, config_element_pid);
1577         if (ret) {
1578                 goto end;
1579         }
1580
1581         /* Writing pid number */
1582         ret = mi_lttng_writer_write_element_signed_int(writer,
1583                         mi_lttng_element_pid_id, (int)pid);
1584         if (ret) {
1585                 goto end;
1586         }
1587
1588         /* Writing name of the process */
1589         if (name) {
1590                 ret = mi_lttng_writer_write_element_string(writer, config_element_name,
1591                                 name);
1592                 if (ret) {
1593                         goto end;
1594                 }
1595         }
1596
1597         if (!is_open) {
1598                 /* Closing Pid */
1599                 ret = mi_lttng_writer_close_element(writer);
1600         }
1601
1602 end:
1603         return ret;
1604 }
1605
1606 LTTNG_HIDDEN
1607 int mi_lttng_targets_open(struct mi_writer *writer)
1608 {
1609         return mi_lttng_writer_open_element(writer,
1610                         config_element_targets);
1611 }
1612
1613 LTTNG_HIDDEN
1614 int mi_lttng_pid_target(struct mi_writer *writer, pid_t pid, int is_open)
1615 {
1616         int ret;
1617
1618         ret = mi_lttng_writer_open_element(writer,
1619                         config_element_target_pid);
1620         if (ret) {
1621                 goto end;
1622         }
1623
1624         /* Writing pid number
1625          * Special case for element all on track untrack command
1626          * All pid is represented as wildcard *
1627          */
1628         if ((int) pid == -1) {
1629                 ret = mi_lttng_writer_write_element_string(writer,
1630                                 config_element_pid,
1631                                 mi_lttng_element_track_untrack_all_wildcard);
1632         } else {
1633                 ret = mi_lttng_writer_write_element_signed_int(writer,
1634                                 config_element_pid, (int) pid);
1635         }
1636         if (ret) {
1637                 goto end;
1638         }
1639
1640         if (!is_open) {
1641                 ret = mi_lttng_writer_close_element(writer);
1642                 if (ret) {
1643                         goto end;
1644                 }
1645         }
1646
1647 end:
1648         return ret;
1649 }
1650
1651 LTTNG_HIDDEN
1652 int mi_lttng_event_fields_open(struct mi_writer *writer)
1653 {
1654         return mi_lttng_writer_open_element(writer, mi_lttng_element_event_fields);
1655 }
1656
1657 LTTNG_HIDDEN
1658 int mi_lttng_event_field(struct mi_writer *writer,
1659                 struct lttng_event_field *field)
1660 {
1661         int ret;
1662
1663         if (!field->field_name[0]) {
1664                 ret = 0;
1665                 goto end;
1666         }
1667
1668         /* Open field */
1669         ret = mi_lttng_writer_open_element(writer, mi_lttng_element_event_field);
1670         if (ret) {
1671                 goto end;
1672         }
1673
1674         if (!field->field_name[0]) {
1675                 goto close;
1676         }
1677
1678         /* Name */
1679         ret = mi_lttng_writer_write_element_string(writer, config_element_name,
1680                         field->field_name);
1681         if (ret) {
1682                 goto end;
1683         }
1684
1685         /* Type */
1686         ret = mi_lttng_writer_write_element_string(writer, config_element_type,
1687                         mi_lttng_eventfieldtype_string(field->type));
1688         if (ret) {
1689                 goto end;
1690         }
1691
1692         /* nowrite  */
1693         ret = mi_lttng_writer_write_element_signed_int(writer,
1694                         mi_lttng_element_nowrite, field->nowrite);
1695         if (ret) {
1696                 goto end;
1697         }
1698
1699 close:
1700         /* Close field element */
1701         ret = mi_lttng_writer_close_element(writer);
1702
1703 end:
1704         return ret;
1705 }
1706
1707 LTTNG_HIDDEN
1708 int mi_lttng_perf_counter_context(struct mi_writer *writer,
1709                 struct lttng_event_perf_counter_ctx  *perf_context)
1710 {
1711         int ret;
1712
1713         /* Open perf_counter_context */
1714         ret = mi_lttng_writer_open_element(writer,
1715                         mi_lttng_element_perf_counter_context);
1716         if (ret) {
1717                 goto end;
1718         }
1719
1720         /* Type */
1721         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1722                         config_element_type, perf_context->type);
1723         if (ret) {
1724                 goto end;
1725         }
1726
1727         /* Config */
1728         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1729                         config_element_config, perf_context->config);
1730         if (ret) {
1731                 goto end;
1732         }
1733
1734         /* Name of the perf counter */
1735         ret = mi_lttng_writer_write_element_string(writer,
1736                         config_element_name, perf_context->name);
1737         if (ret) {
1738                 goto end;
1739         }
1740
1741         /* Close perf_counter_context */
1742         ret = mi_lttng_writer_close_element(writer);
1743 end:
1744         return ret;
1745 }
1746
1747 static
1748 int mi_lttng_app_context(struct mi_writer *writer,
1749                 const char *provider_name, const char *ctx_name)
1750 {
1751         int ret;
1752
1753         /* Open app */
1754         ret = mi_lttng_writer_open_element(writer,
1755                         config_element_context_app);
1756         if (ret) {
1757                 goto end;
1758         }
1759
1760         /* provider_name */
1761         ret = mi_lttng_writer_write_element_string(writer,
1762                         config_element_context_app_provider_name,
1763                         provider_name);
1764         if (ret) {
1765                 goto end;
1766         }
1767
1768         /* ctx_name */
1769         ret = mi_lttng_writer_write_element_string(writer,
1770                         config_element_context_app_ctx_name, ctx_name);
1771         if (ret) {
1772                 goto end;
1773         }
1774
1775         /* Close app */
1776         ret = mi_lttng_writer_close_element(writer);
1777 end:
1778         return ret;
1779 }
1780
1781 LTTNG_HIDDEN
1782 int mi_lttng_context(struct mi_writer *writer,
1783                 struct lttng_event_context *context, int is_open)
1784 {
1785         int ret;
1786
1787         /* Open context */
1788         ret = mi_lttng_writer_open_element(writer , config_element_context);
1789         if (ret) {
1790                 goto end;
1791         }
1792
1793         /* Special case for PERF_*_COUNTER
1794          * print the lttng_event_perf_counter_ctx*/
1795         switch (context->ctx) {
1796         case LTTNG_EVENT_CONTEXT_PERF_COUNTER:
1797         case LTTNG_EVENT_CONTEXT_PERF_THREAD_COUNTER:
1798         case LTTNG_EVENT_CONTEXT_PERF_CPU_COUNTER:
1799         {
1800                 struct lttng_event_perf_counter_ctx *perf_context =
1801                                 &context->u.perf_counter;
1802                 ret =  mi_lttng_perf_counter_context(writer, perf_context);
1803                 if (ret) {
1804                         goto end;
1805                 }
1806                 break;
1807         }
1808         case LTTNG_EVENT_CONTEXT_APP_CONTEXT:
1809         {
1810                 ret = mi_lttng_app_context(writer,
1811                                 context->u.app_ctx.provider_name,
1812                                 context->u.app_ctx.ctx_name);
1813                 if (ret) {
1814                         goto end;
1815                 }
1816                 break;
1817         }
1818         default:
1819         {
1820                 const char *type_string = mi_lttng_event_contexttype_string(
1821                                 context->ctx);
1822                 if (!type_string) {
1823                         ret = -LTTNG_ERR_INVALID;
1824                         goto end;
1825                 }
1826
1827                 /* Print context type */
1828                 ret = mi_lttng_writer_write_element_string(writer,
1829                                 config_element_type, type_string);
1830                 break;
1831         }
1832         }
1833
1834         /* Close context */
1835         if (!is_open) {
1836                 ret = mi_lttng_writer_close_element(writer);
1837         }
1838
1839 end:
1840         return ret;
1841 }
1842
1843 LTTNG_HIDDEN
1844 int mi_lttng_snapshot_output_session_name(struct mi_writer *writer,
1845                 const char *session_name)
1846 {
1847         int ret;
1848
1849         /* Open session element */
1850         ret = mi_lttng_writer_open_element(writer, config_element_session);
1851         if (ret) {
1852                 goto end;
1853         }
1854
1855         /* Snapshot output list for current session name */
1856         ret = mi_lttng_writer_write_element_string(writer, config_element_name,
1857                         session_name);
1858         if (ret) {
1859                 goto end;
1860         }
1861
1862         /* Open element snapshots (sequence one snapshot) */
1863         ret = mi_lttng_writer_open_element(writer, mi_lttng_element_snapshots);
1864         if (ret) {
1865                 goto end;
1866         }
1867
1868 end:
1869         return ret;
1870 }
1871
1872 LTTNG_HIDDEN
1873 int mi_lttng_snapshot_list_output(struct mi_writer *writer,
1874                 struct lttng_snapshot_output *output)
1875 {
1876         int ret;
1877
1878         /* Open element snapshot output */
1879         ret = mi_lttng_writer_open_element(writer,
1880                         mi_lttng_element_command_snapshot);
1881         if (ret) {
1882                 goto end;
1883         }
1884
1885         /* ID of the snapshot output */
1886         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1887                         mi_lttng_element_id, output->id);
1888         if (ret) {
1889                 goto end;
1890         }
1891
1892         /* Name of the output */
1893         ret = mi_lttng_writer_write_element_string(writer, config_element_name,
1894                         output->name);
1895         if (ret) {
1896                 goto end;
1897         }
1898
1899         /* Destination of the output (ctrl_url)*/
1900         ret = mi_lttng_writer_write_element_string(writer,
1901                         mi_lttng_element_snapshot_ctrl_url, output->ctrl_url);
1902         if (ret) {
1903                 goto end;
1904         }
1905
1906         /* Destination of the output (data_url) */
1907         ret = mi_lttng_writer_write_element_string(writer,
1908                         mi_lttng_element_snapshot_data_url, output->data_url);
1909         if (ret) {
1910                 goto end;
1911         }
1912
1913         /* total size of all stream combined */
1914         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1915                         mi_lttng_element_snapshot_max_size, output->max_size);
1916         if (ret) {
1917                 goto end;
1918         }
1919
1920         /* Close snapshot output element */
1921         ret = mi_lttng_writer_close_element(writer);
1922
1923 end:
1924         return ret;
1925 }
1926
1927 LTTNG_HIDDEN
1928 int mi_lttng_snapshot_del_output(struct mi_writer *writer, int id,
1929                 const char *name, const char *current_session_name)
1930 {
1931         int ret;
1932
1933         /* Open element del_snapshot */
1934         ret = mi_lttng_writer_open_element(writer,
1935                         mi_lttng_element_command_snapshot);
1936         if (ret) {
1937                 goto end;
1938         }
1939
1940
1941         if (id != UINT32_MAX) {
1942                 /* "Snapshot output "id" successfully deleted
1943                  * for "current_session_name"
1944                  * ID of the snapshot output
1945                  */
1946                 ret = mi_lttng_writer_write_element_unsigned_int(writer,
1947                                 mi_lttng_element_id, id);
1948                 if (ret) {
1949                         goto end;
1950                 }
1951         } else {
1952                 /* "Snapshot output "name" successfully deleted
1953                  * for session "current_session_name"
1954                  * Name of the output
1955                  */
1956                 ret = mi_lttng_writer_write_element_string(writer, config_element_name,
1957                                 name);
1958                 if (ret) {
1959                         goto end;
1960                 }
1961         }
1962
1963         /* Snapshot was deleted for session "current_session_name"*/
1964         ret = mi_lttng_writer_write_element_string(writer,
1965                         mi_lttng_element_snapshot_session_name,
1966                         current_session_name);
1967         if (ret) {
1968                 goto end;
1969         }
1970
1971         /* Close snapshot element */
1972         ret = mi_lttng_writer_close_element(writer);
1973
1974 end:
1975         return ret;
1976 }
1977
1978 LTTNG_HIDDEN
1979 int mi_lttng_snapshot_add_output(struct mi_writer *writer,
1980                 const char *current_session_name, const char *n_ptr,
1981                 struct lttng_snapshot_output *output)
1982 {
1983         int ret;
1984
1985         /* Open element snapshot */
1986         ret = mi_lttng_writer_open_element(writer,
1987                         mi_lttng_element_command_snapshot);
1988         if (ret) {
1989                 goto end;
1990         }
1991
1992         /* Snapshot output id */
1993         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1994                         mi_lttng_element_id, output->id);
1995         if (ret) {
1996                 goto end;
1997         }
1998
1999         /* Snapshot output names */
2000         ret = mi_lttng_writer_write_element_string(writer,
2001                         config_element_name, n_ptr);
2002         if (ret) {
2003                 goto end;
2004         }
2005
2006         /* Destination of the output (ctrl_url)*/
2007         ret = mi_lttng_writer_write_element_string(writer,
2008                         mi_lttng_element_snapshot_ctrl_url, output->ctrl_url);
2009         if (ret) {
2010                 goto end;
2011         }
2012
2013         /* Snapshot added for session "current_session_name"*/
2014         ret = mi_lttng_writer_write_element_string(writer,
2015                         mi_lttng_element_snapshot_session_name, current_session_name);
2016         if (ret) {
2017                 goto end;
2018         }
2019
2020         /* total size of all stream combined */
2021         ret = mi_lttng_writer_write_element_unsigned_int(writer,
2022                         mi_lttng_element_snapshot_max_size, output->max_size);
2023         if (ret) {
2024                 goto end;
2025         }
2026
2027         /* Close snapshot element */
2028         ret = mi_lttng_writer_close_element(writer);
2029
2030 end:
2031         return ret;
2032 }
2033
2034 LTTNG_HIDDEN
2035 int mi_lttng_snapshot_record(struct mi_writer *writer,
2036                 const char *current_session_name, const char *url,
2037                 const char *cmdline_ctrl_url, const char *cmdline_data_url)
2038 {
2039         int ret;
2040
2041         /* Open element snapshot */
2042         ret = mi_lttng_writer_open_element(writer,
2043                         mi_lttng_element_command_snapshot);
2044         if (ret) {
2045                 goto end;
2046         }
2047
2048         /*
2049          * If a valid an URL was given, serialize it,
2050          * else take the command line data and ctrl urls*/
2051         if (url) {
2052                 /* Destination of the output (ctrl_url)*/
2053                 ret = mi_lttng_writer_write_element_string(writer,
2054                                 mi_lttng_element_snapshot_ctrl_url, url);
2055                 if (ret) {
2056                         goto end;
2057                 }
2058         } else if (cmdline_ctrl_url) {
2059                 /* Destination of the output (ctrl_url)*/
2060                 ret = mi_lttng_writer_write_element_string(writer,
2061                                 mi_lttng_element_snapshot_ctrl_url, cmdline_ctrl_url);
2062                 if (ret) {
2063                         goto end;
2064                 }
2065
2066                 /* Destination of the output (data_url) */
2067                 ret = mi_lttng_writer_write_element_string(writer,
2068                                 mi_lttng_element_snapshot_data_url, cmdline_data_url);
2069                 if (ret) {
2070                         goto end;
2071                 }
2072         }
2073
2074         /* Close record_snapshot element */
2075         ret = mi_lttng_writer_close_element(writer);
2076
2077 end:
2078         return ret;
2079 }
2080
2081 LTTNG_HIDDEN
2082 int mi_lttng_rotation_schedule(struct mi_writer *writer,
2083                 const struct lttng_rotation_schedule *schedule)
2084 {
2085         int ret = 0;
2086         enum lttng_rotation_status status;
2087         uint64_t value;
2088         const char *element_name;
2089         const char *value_name;
2090         bool empty_schedule = false;
2091
2092         switch (lttng_rotation_schedule_get_type(schedule)) {
2093         case LTTNG_ROTATION_SCHEDULE_TYPE_PERIODIC:
2094                 status = lttng_rotation_schedule_periodic_get_period(schedule,
2095                                 &value);
2096                 element_name = mi_lttng_element_rotation_schedule_periodic;
2097                 value_name = mi_lttng_element_rotation_schedule_periodic_time_us;
2098                 break;
2099         case LTTNG_ROTATION_SCHEDULE_TYPE_SIZE_THRESHOLD:
2100                 status = lttng_rotation_schedule_size_threshold_get_threshold(
2101                                 schedule, &value);
2102                 element_name = mi_lttng_element_rotation_schedule_size_threshold;
2103                 value_name = mi_lttng_element_rotation_schedule_size_threshold_bytes;
2104                 break;
2105         default:
2106                 ret = -1;
2107                 goto end;
2108         }
2109
2110         if (status != LTTNG_ROTATION_STATUS_OK) {
2111                 if (status == LTTNG_ROTATION_STATUS_UNAVAILABLE) {
2112                         empty_schedule = true;
2113                 } else {
2114                         ret = -1;
2115                         goto end;
2116                 }
2117         }
2118
2119         ret = mi_lttng_writer_open_element(writer, element_name);
2120         if (ret) {
2121                 goto end;
2122         }
2123
2124         if (!empty_schedule) {
2125                 ret = mi_lttng_writer_write_element_unsigned_int(writer,
2126                                 value_name, value);
2127                 if (ret) {
2128                         goto end;
2129                 }
2130         }
2131
2132         /* Close schedule descriptor element. */
2133         ret = mi_lttng_writer_close_element(writer);
2134         if (ret) {
2135                 goto end;
2136         }
2137 end:
2138         return ret;
2139 }
2140
2141 LTTNG_HIDDEN
2142 int mi_lttng_rotation_schedule_result(struct mi_writer *writer,
2143                 const struct lttng_rotation_schedule *schedule,
2144                 bool success)
2145 {
2146         int ret = 0;
2147
2148         ret = mi_lttng_writer_open_element(writer,
2149                         mi_lttng_element_rotation_schedule_result);
2150         if (ret) {
2151                 goto end;
2152         }
2153
2154         ret = mi_lttng_writer_open_element(writer,
2155                         mi_lttng_element_rotation_schedule);
2156         if (ret) {
2157                 goto end;
2158         }
2159
2160         ret = mi_lttng_rotation_schedule(writer, schedule);
2161         if (ret) {
2162                 goto end;
2163         }
2164
2165         /* Close rotation_schedule element */
2166         ret = mi_lttng_writer_close_element(writer);
2167         if (ret) {
2168                 goto end;
2169         }
2170
2171         ret = mi_lttng_writer_write_element_bool(writer,
2172                         mi_lttng_element_command_success, success);
2173         if (ret) {
2174                 goto end;
2175         }
2176
2177         /* Close rotation_schedule_result element */
2178         ret = mi_lttng_writer_close_element(writer);
2179         if (ret) {
2180                 goto end;
2181         }
2182 end:
2183         return ret;
2184 }
2185
2186 static
2187 int mi_lttng_location(struct mi_writer *writer,
2188                 const struct lttng_trace_archive_location *location)
2189 {
2190         int ret = 0;
2191         enum lttng_trace_archive_location_type location_type;
2192         enum lttng_trace_archive_location_status status;
2193
2194         location_type = lttng_trace_archive_location_get_type(location);
2195
2196         switch (location_type) {
2197         case LTTNG_TRACE_ARCHIVE_LOCATION_TYPE_LOCAL:
2198         {
2199                 const char *absolute_path;
2200
2201                 status = lttng_trace_archive_location_local_get_absolute_path(
2202                                 location, &absolute_path);
2203                 if (status != LTTNG_TRACE_ARCHIVE_LOCATION_STATUS_OK) {
2204                         ret = -1;
2205                         goto end;
2206                 }
2207
2208                 ret = mi_lttng_writer_open_element(writer,
2209                                 mi_lttng_element_rotation_location_local);
2210                 if (ret) {
2211                         goto end;
2212                 }
2213
2214
2215                 ret = mi_lttng_writer_write_element_string(writer,
2216                                 mi_lttng_element_rotation_location_local_absolute_path,
2217                                 absolute_path);
2218                 if (ret) {
2219                         goto end;
2220                 }
2221
2222                 /* Close local element */
2223                 ret = mi_lttng_writer_close_element(writer);
2224                 if (ret) {
2225                         goto end;
2226                 }
2227                 break;
2228         }
2229         case LTTNG_TRACE_ARCHIVE_LOCATION_TYPE_RELAY:
2230         {
2231                 uint16_t control_port, data_port;
2232                 const char *host, *relative_path;
2233                 enum lttng_trace_archive_location_relay_protocol_type protocol;
2234
2235                 /* Fetch all relay location parameters. */
2236                 status = lttng_trace_archive_location_relay_get_protocol_type(
2237                                 location, &protocol);
2238                 if (status != LTTNG_TRACE_ARCHIVE_LOCATION_STATUS_OK) {
2239                         ret = -1;
2240                         goto end;
2241                 }
2242
2243                 status = lttng_trace_archive_location_relay_get_host(
2244                                 location, &host);
2245                 if (status != LTTNG_TRACE_ARCHIVE_LOCATION_STATUS_OK) {
2246                         ret = -1;
2247                         goto end;
2248                 }
2249
2250                 status = lttng_trace_archive_location_relay_get_control_port(
2251                                 location, &control_port);
2252                 if (status != LTTNG_TRACE_ARCHIVE_LOCATION_STATUS_OK) {
2253                         ret = -1;
2254                         goto end;
2255                 }
2256
2257                 status = lttng_trace_archive_location_relay_get_data_port(
2258                                 location, &data_port);
2259                 if (status != LTTNG_TRACE_ARCHIVE_LOCATION_STATUS_OK) {
2260                         ret = -1;
2261                         goto end;
2262                 }
2263
2264                 status = lttng_trace_archive_location_relay_get_relative_path(
2265                                 location, &relative_path);
2266                 if (status != LTTNG_TRACE_ARCHIVE_LOCATION_STATUS_OK) {
2267                         ret = -1;
2268                         goto end;
2269                 }
2270
2271                 ret = mi_lttng_writer_open_element(writer,
2272                                 mi_lttng_element_rotation_location_relay);
2273                 if (ret) {
2274                         goto end;
2275                 }
2276
2277                 ret = mi_lttng_writer_write_element_string(writer,
2278                                 mi_lttng_element_rotation_location_relay_host,
2279                                 host);
2280                 if (ret) {
2281                         goto end;
2282                 }
2283
2284                 ret = mi_lttng_writer_write_element_unsigned_int(writer,
2285                                 mi_lttng_element_rotation_location_relay_control_port,
2286                                 control_port);
2287                 if (ret) {
2288                         goto end;
2289                 }
2290
2291                 ret = mi_lttng_writer_write_element_unsigned_int(writer,
2292                                 mi_lttng_element_rotation_location_relay_data_port,
2293                                 data_port);
2294                 if (ret) {
2295                         goto end;
2296                 }
2297
2298                 ret = mi_lttng_writer_write_element_string(writer,
2299                                 mi_lttng_element_rotation_location_relay_protocol,
2300                                 mi_lttng_trace_archive_location_relay_protocol_type_string(protocol));
2301                 if (ret) {
2302                         goto end;
2303                 }
2304
2305                 ret = mi_lttng_writer_write_element_string(writer,
2306                                 mi_lttng_element_rotation_location_relay_relative_path,
2307                                 relative_path);
2308                 if (ret) {
2309                         goto end;
2310                 }
2311
2312                 /* Close relay element */
2313                 ret = mi_lttng_writer_close_element(writer);
2314                 if (ret) {
2315                         goto end;
2316                 }
2317                 break;
2318         }
2319         default:
2320                 abort();
2321         }
2322 end:
2323         return ret;
2324 }
2325
2326 LTTNG_HIDDEN
2327 int mi_lttng_rotate(struct mi_writer *writer,
2328                 const char *session_name,
2329                 enum lttng_rotation_state rotation_state,
2330                 const struct lttng_trace_archive_location *location)
2331 {
2332         int ret;
2333
2334         ret = mi_lttng_writer_open_element(writer,
2335                         mi_lttng_element_rotation);
2336         if (ret) {
2337                 goto end;
2338         }
2339
2340         ret = mi_lttng_writer_write_element_string(writer,
2341                         mi_lttng_element_session_name,
2342                         session_name);
2343         if (ret) {
2344                 goto end;
2345         }
2346
2347         ret = mi_lttng_writer_write_element_string(writer,
2348                         mi_lttng_element_rotation_state,
2349                         mi_lttng_rotation_state_string(rotation_state));
2350         if (ret) {
2351                 goto end;
2352         }
2353
2354         if (!location) {
2355                 /* Not a serialization error. */
2356                 goto close_rotation;
2357         }
2358
2359         ret = mi_lttng_writer_open_element(writer,
2360                         mi_lttng_element_rotation_location);
2361         if (ret) {
2362                 goto end;
2363         }
2364
2365         ret = mi_lttng_location(writer, location);
2366         if (ret) {
2367                 goto close_location;
2368         }
2369
2370 close_location:
2371         /* Close location element */
2372         ret = mi_lttng_writer_close_element(writer);
2373         if (ret) {
2374                 goto end;
2375         }
2376
2377 close_rotation:
2378         /* Close rotation element */
2379         ret = mi_lttng_writer_close_element(writer);
2380         if (ret) {
2381                 goto end;
2382         }
2383 end:
2384         return ret;
2385 }