src/common/mi-lttng.c

   1 /*
   2  * Copyright (C) 2014 Jonathan Rajotte <jonathan.r.julien@gmail.com>
   3  * Copyright (C) 2014 Olivier Cotte <olivier.cotte@polymtl.ca>
   4  * Copyright (C) 2016 Jérémie Galarneau <jeremie.galarneau@efficios.com>
   5  *
   6  * SPDX-License-Identifier: GPL-2.0-only
   7  *
   8  */
   9
  10 #include "lttng/tracker.h"
  11 #define _LGPL_SOURCE
  12 #include "mi-lttng.h"
  13 #include <common/config/session-config.h>
  14 #include <common/defaults.h>
  15 #include <common/tracker.h>
  16 #include <lttng/channel.h>
  17 #include <lttng/snapshot-internal.h>
  18
  19 #include <assert.h>
  20
  21 #define MI_SCHEMA_MAJOR_VERSION 4
  22 #define MI_SCHEMA_MINOR_VERSION 0
  23
  24 /* Machine interface namespace URI */
  25 LTTNG_HIDDEN const char * const mi_lttng_xmlns = "xmlns";
  26 LTTNG_HIDDEN const char * const mi_lttng_xmlns_xsi = "xmlns:xsi";
  27 LTTNG_HIDDEN const char * const mi_lttng_w3_schema_uri = "http://www.w3.org/2001/XMLSchema-instance";
  28 LTTNG_HIDDEN const char * const mi_lttng_schema_location = "xsi:schemaLocation";
  29 LTTNG_HIDDEN const char * const mi_lttng_schema_location_uri =
  30         DEFAULT_LTTNG_MI_NAMESPACE " "
  31         "https://lttng.org/xml/schemas/lttng-mi/" XSTR(MI_SCHEMA_MAJOR_VERSION)
  32         "/lttng-mi-" XSTR(MI_SCHEMA_MAJOR_VERSION) "."
  33         XSTR(MI_SCHEMA_MINOR_VERSION) ".xsd";
  34 LTTNG_HIDDEN const char * const mi_lttng_schema_version = "schemaVersion";
  35 LTTNG_HIDDEN const char * const mi_lttng_schema_version_value = XSTR(MI_SCHEMA_MAJOR_VERSION)
  36         "." XSTR(MI_SCHEMA_MINOR_VERSION);
  37
  38 /* Strings related to command */
  39 const char * const mi_lttng_element_command = "command";
  40 const char * const mi_lttng_element_command_action = "snapshot_action";
  41 const char * const mi_lttng_element_command_add_context = "add-context";
  42 const char * const mi_lttng_element_command_create = "create";
  43 const char * const mi_lttng_element_command_destroy = "destroy";
  44 const char * const mi_lttng_element_command_disable_channel = "disable-channel";
  45 const char * const mi_lttng_element_command_disable_event = "disable-event";
  46 const char * const mi_lttng_element_command_enable_channels = "enable-channel";
  47 const char * const mi_lttng_element_command_enable_event = "enable-event";
  48 const char * const mi_lttng_element_command_list = "list";
  49 const char * const mi_lttng_element_command_load = "load";
  50 LTTNG_HIDDEN const char * const mi_lttng_element_command_metadata = "metadata";
  51 LTTNG_HIDDEN const char * const mi_lttng_element_command_metadata_action = "metadata_action";
  52 LTTNG_HIDDEN const char * const mi_lttng_element_command_regenerate = "regenerate";
  53 LTTNG_HIDDEN const char * const mi_lttng_element_command_regenerate_action = "regenerate_action";
  54 const char * const mi_lttng_element_command_name = "name";
  55 const char * const mi_lttng_element_command_output = "output";
  56 const char * const mi_lttng_element_command_save = "save";
  57 const char * const mi_lttng_element_command_set_session = "set-session";
  58 const char * const mi_lttng_element_command_snapshot = "snapshot";
  59 const char * const mi_lttng_element_command_snapshot_add = "add_snapshot";
  60 const char * const mi_lttng_element_command_snapshot_del = "del_snapshot";
  61 const char * const mi_lttng_element_command_snapshot_list = "list_snapshot";
  62 const char * const mi_lttng_element_command_snapshot_record = "record_snapshot";
  63 const char * const mi_lttng_element_command_start = "start";
  64 const char * const mi_lttng_element_command_stop = "stop";
  65 const char * const mi_lttng_element_command_success = "success";
  66 const char * const mi_lttng_element_command_track = "track";
  67 const char * const mi_lttng_element_command_untrack = "untrack";
  68 const char * const mi_lttng_element_command_version = "version";
  69 LTTNG_HIDDEN const char * const mi_lttng_element_command_rotate = "rotate";
  70 LTTNG_HIDDEN const char * const mi_lttng_element_command_enable_rotation = "enable-rotation";
  71 LTTNG_HIDDEN const char * const mi_lttng_element_command_disable_rotation = "disable-rotation";
  72 LTTNG_HIDDEN const char * const mi_lttng_element_command_clear = "clear";
  73
  74 /* Strings related to version command */
  75 const char * const mi_lttng_element_version = "version";
  76 const char * const mi_lttng_element_version_commit = "commit";
  77 const char * const mi_lttng_element_version_description = "description";
  78 const char * const mi_lttng_element_version_license = "license";
  79 const char * const mi_lttng_element_version_major = "major";
  80 const char * const mi_lttng_element_version_minor = "minor";
  81 const char * const mi_lttng_element_version_patch_level = "patchLevel";
  82 const char * const mi_lttng_element_version_str = "string";
  83 const char * const mi_lttng_element_version_web = "url";
  84
  85 /* String related to a lttng_event_field */
  86 const char * const mi_lttng_element_event_field = "event_field";
  87 const char * const mi_lttng_element_event_fields = "event_fields";
  88
  89 /* String related to lttng_event_perf_counter_ctx */
  90 const char * const mi_lttng_element_perf_counter_context = "perf";
  91
  92 /* Strings related to pid */
  93 const char * const mi_lttng_element_pid_id = "id";
  94
  95 /* Strings related to save command */
  96 const char * const mi_lttng_element_save = "save";
  97
  98 /* Strings related to load command */
  99 const char * const mi_lttng_element_load = "load";
 100 LTTNG_HIDDEN const char * const mi_lttng_element_load_overrides = "overrides";
 101 LTTNG_HIDDEN const char * const mi_lttng_element_load_override_url = "url";
 102
 103 /* General elements of mi_lttng */
 104 const char * const mi_lttng_element_empty = "";
 105 const char * const mi_lttng_element_id = "id";
 106 const char * const mi_lttng_element_nowrite = "nowrite";
 107 const char * const mi_lttng_element_success = "success";
 108 const char * const mi_lttng_element_type_enum = "ENUM";
 109 const char * const mi_lttng_element_type_float = "FLOAT";
 110 const char * const mi_lttng_element_type_integer = "INTEGER";
 111 const char * const mi_lttng_element_type_other = "OTHER";
 112 const char * const mi_lttng_element_type_string = "STRING";
 113
 114 /* String related to loglevel */
 115 const char * const mi_lttng_loglevel_str_alert = "TRACE_ALERT";
 116 const char * const mi_lttng_loglevel_str_crit = "TRACE_CRIT";
 117 const char * const mi_lttng_loglevel_str_debug = "TRACE_DEBUG";
 118 const char * const mi_lttng_loglevel_str_debug_function = "TRACE_DEBUG_FUNCTION";
 119 const char * const mi_lttng_loglevel_str_debug_line = "TRACE_DEBUG_LINE";
 120 const char * const mi_lttng_loglevel_str_debug_module = "TRACE_DEBUG_MODULE";
 121 const char * const mi_lttng_loglevel_str_debug_process = "TRACE_DEBUG_PROCESS";
 122 const char * const mi_lttng_loglevel_str_debug_program = "TRACE_DEBUG_PROGRAM";
 123 const char * const mi_lttng_loglevel_str_debug_system = "TRACE_DEBUG_SYSTEM";
 124 const char * const mi_lttng_loglevel_str_debug_unit = "TRACE_DEBUG_UNIT";
 125 const char * const mi_lttng_loglevel_str_emerg = "TRACE_EMERG";
 126 const char * const mi_lttng_loglevel_str_err = "TRACE_ERR";
 127 const char * const mi_lttng_loglevel_str_info = "TRACE_INFO";
 128 const char * const mi_lttng_loglevel_str_notice = "TRACE_NOTICE";
 129 const char * const mi_lttng_loglevel_str_unknown = "UNKNOWN";
 130 const char * const mi_lttng_loglevel_str_warning = "TRACE_WARNING";
 131
 132 /* String related to loglevel JUL */
 133 const char * const mi_lttng_loglevel_str_jul_all = "JUL_ALL";
 134 const char * const mi_lttng_loglevel_str_jul_config = "JUL_CONFIG";
 135 const char * const mi_lttng_loglevel_str_jul_fine = "JUL_FINE";
 136 const char * const mi_lttng_loglevel_str_jul_finer = "JUL_FINER";
 137 const char * const mi_lttng_loglevel_str_jul_finest = "JUL_FINEST";
 138 const char * const mi_lttng_loglevel_str_jul_info = "JUL_INFO";
 139 const char * const mi_lttng_loglevel_str_jul_off = "JUL_OFF";
 140 const char * const mi_lttng_loglevel_str_jul_severe = "JUL_SEVERE";
 141 const char * const mi_lttng_loglevel_str_jul_warning = "JUL_WARNING";
 142
 143 /* String related to loglevel LOG4J */
 144 const char * const mi_lttng_loglevel_str_log4j_off = "LOG4J_OFF";
 145 const char * const mi_lttng_loglevel_str_log4j_fatal = "LOG4J_FATAL";
 146 const char * const mi_lttng_loglevel_str_log4j_error = "LOG4J_ERROR";
 147 const char * const mi_lttng_loglevel_str_log4j_warn = "LOG4J_WARN";
 148 const char * const mi_lttng_loglevel_str_log4j_info = "LOG4J_INFO";
 149 const char * const mi_lttng_loglevel_str_log4j_debug = "LOG4J_DEBUG";
 150 const char * const mi_lttng_loglevel_str_log4j_trace = "LOG4J_TRACE";
 151 const char * const mi_lttng_loglevel_str_log4j_all = "LOG4J_ALL";
 152
 153 /* String related to loglevel Python */
 154 const char * const mi_lttng_loglevel_str_python_critical = "PYTHON_CRITICAL";
 155 const char * const mi_lttng_loglevel_str_python_error = "PYTHON_ERROR";
 156 const char * const mi_lttng_loglevel_str_python_warning = "PYTHON_WARNING";
 157 const char * const mi_lttng_loglevel_str_python_info = "PYTHON_INFO";
 158 const char * const mi_lttng_loglevel_str_python_debug = "PYTHON_DEBUG";
 159 const char * const mi_lttng_loglevel_str_python_notset = "PYTHON_NOTSET";
 160
 161 /* String related to loglevel type */
 162 const char * const mi_lttng_loglevel_type_all = "ALL";
 163 const char * const mi_lttng_loglevel_type_range = "RANGE";
 164 const char * const mi_lttng_loglevel_type_single = "SINGLE";
 165 const char * const mi_lttng_loglevel_type_unknown = "UNKNOWN";
 166
 167 /* String related to a lttng_snapshot_output */
 168 const char * const mi_lttng_element_snapshot_ctrl_url = "ctrl_url";
 169 const char * const mi_lttng_element_snapshot_data_url = "data_url";
 170 const char * const mi_lttng_element_snapshot_max_size = "max_size";
 171 const char * const mi_lttng_element_snapshot_n_ptr = "n_ptr";
 172 const char * const mi_lttng_element_snapshot_session_name = "session_name";
 173 const char * const mi_lttng_element_snapshots = "snapshots";
 174
 175 /* String related to track/untrack command */
 176 const char * const mi_lttng_element_track_untrack_all_wildcard = "*";
 177
 178 LTTNG_HIDDEN const char * const mi_lttng_element_session_name = "session_name";
 179
 180 /* String related to rotate command */
 181 LTTNG_HIDDEN const char * const mi_lttng_element_rotation = "rotation";
 182 LTTNG_HIDDEN const char * const mi_lttng_element_rotate_status = "status";
 183 LTTNG_HIDDEN const char * const mi_lttng_element_rotation_schedule = "rotation_schedule";
 184 LTTNG_HIDDEN const char * const mi_lttng_element_rotation_schedules = "rotation_schedules";
 185 LTTNG_HIDDEN const char * const mi_lttng_element_rotation_schedule_result = "rotation_schedule_result";
 186 LTTNG_HIDDEN const char * const mi_lttng_element_rotation_schedule_results = "rotation_schedule_results";
 187 LTTNG_HIDDEN const char * const mi_lttng_element_rotation_schedule_periodic = "periodic";
 188 LTTNG_HIDDEN const char * const mi_lttng_element_rotation_schedule_periodic_time_us = "time_us";
 189 LTTNG_HIDDEN const char * const mi_lttng_element_rotation_schedule_size_threshold = "size_threshold";
 190 LTTNG_HIDDEN const char * const mi_lttng_element_rotation_schedule_size_threshold_bytes = "bytes";
 191 LTTNG_HIDDEN const char * const mi_lttng_element_rotation_state = "state";
 192 LTTNG_HIDDEN const char * const mi_lttng_element_rotation_location = "location";
 193 LTTNG_HIDDEN const char * const mi_lttng_element_rotation_location_local = "local";
 194 LTTNG_HIDDEN const char * const mi_lttng_element_rotation_location_local_absolute_path = "absolute_path";
 195 LTTNG_HIDDEN const char * const mi_lttng_element_rotation_location_relay = "relay";
 196 LTTNG_HIDDEN const char * const mi_lttng_element_rotation_location_relay_host = "host";
 197 LTTNG_HIDDEN const char * const mi_lttng_element_rotation_location_relay_control_port = "control_port";
 198 LTTNG_HIDDEN const char * const mi_lttng_element_rotation_location_relay_data_port = "data_port";
 199 LTTNG_HIDDEN const char * const mi_lttng_element_rotation_location_relay_protocol = "protocol";
 200 LTTNG_HIDDEN const char * const mi_lttng_element_rotation_location_relay_relative_path = "relative_path";
 201
 202 /* String related to enum lttng_rotation_state */
 203 LTTNG_HIDDEN const char * const mi_lttng_rotation_state_str_ongoing = "ONGOING";
 204 LTTNG_HIDDEN const char * const mi_lttng_rotation_state_str_completed = "COMPLETED";
 205 LTTNG_HIDDEN const char * const mi_lttng_rotation_state_str_expired = "EXPIRED";
 206 LTTNG_HIDDEN const char * const mi_lttng_rotation_state_str_error = "ERROR";
 207
 208 /* String related to enum lttng_trace_archive_location_relay_protocol_type */
 209 LTTNG_HIDDEN const char * const mi_lttng_rotation_location_relay_protocol_str_tcp = "TCP";
 210
 211 /* String related to add-context command */
 212 LTTNG_HIDDEN const char * const mi_lttng_element_context_symbol = "symbol";
 213
 214 /* Deprecated symbols preserved for ABI compatibility. */
 215 const char * const mi_lttng_context_type_perf_counter;
 216 const char * const mi_lttng_context_type_perf_cpu_counter;
 217 const char * const mi_lttng_context_type_perf_thread_counter;
 218 const char * const mi_lttng_element_track_untrack_pid_target;
 219 const char * const mi_lttng_element_track_untrack_targets;
 220 const char * const mi_lttng_element_calibrate;
 221 const char * const mi_lttng_element_calibrate_function;
 222 const char * const mi_lttng_element_command_calibrate;
 223
 224 /* This is a merge of jul loglevel and regular loglevel
 225  * Those should never overlap by definition
 226  * (see struct lttng_event loglevel)
 227  */
 228 LTTNG_HIDDEN
 229 const char *mi_lttng_loglevel_string(int value, enum lttng_domain_type domain)
 230 {
 231         switch (domain) {
 232         case LTTNG_DOMAIN_KERNEL:
 233         case LTTNG_DOMAIN_UST:
 234                 switch (value) {
 235                 case -1:
 236                         return mi_lttng_element_empty;
 237                 case LTTNG_LOGLEVEL_EMERG:
 238                         return mi_lttng_loglevel_str_emerg;
 239                 case LTTNG_LOGLEVEL_ALERT:
 240                         return mi_lttng_loglevel_str_alert;
 241                 case LTTNG_LOGLEVEL_CRIT:
 242                         return mi_lttng_loglevel_str_crit;
 243                 case LTTNG_LOGLEVEL_ERR:
 244                         return mi_lttng_loglevel_str_err;
 245                 case LTTNG_LOGLEVEL_WARNING:
 246                         return mi_lttng_loglevel_str_warning;
 247                 case LTTNG_LOGLEVEL_NOTICE:
 248                         return mi_lttng_loglevel_str_notice;
 249                 case LTTNG_LOGLEVEL_INFO:
 250                         return mi_lttng_loglevel_str_info;
 251                 case LTTNG_LOGLEVEL_DEBUG_SYSTEM:
 252                         return mi_lttng_loglevel_str_debug_system;
 253                 case LTTNG_LOGLEVEL_DEBUG_PROGRAM:
 254                         return mi_lttng_loglevel_str_debug_program;
 255                 case LTTNG_LOGLEVEL_DEBUG_PROCESS:
 256                         return mi_lttng_loglevel_str_debug_process;
 257                 case LTTNG_LOGLEVEL_DEBUG_MODULE:
 258                         return mi_lttng_loglevel_str_debug_module;
 259                 case LTTNG_LOGLEVEL_DEBUG_UNIT:
 260                         return mi_lttng_loglevel_str_debug_unit;
 261                 case LTTNG_LOGLEVEL_DEBUG_FUNCTION:
 262                         return mi_lttng_loglevel_str_debug_function;
 263                 case LTTNG_LOGLEVEL_DEBUG_LINE:
 264                         return mi_lttng_loglevel_str_debug_line;
 265                 case LTTNG_LOGLEVEL_DEBUG:
 266                         return mi_lttng_loglevel_str_debug;
 267                 default:
 268                         return mi_lttng_loglevel_str_unknown;
 269                 }
 270                 break;
 271         case LTTNG_DOMAIN_LOG4J:
 272                 switch (value) {
 273                 case -1:
 274                         return mi_lttng_element_empty;
 275                 case LTTNG_LOGLEVEL_LOG4J_OFF:
 276                         return mi_lttng_loglevel_str_log4j_off;
 277                 case LTTNG_LOGLEVEL_LOG4J_FATAL:
 278                         return mi_lttng_loglevel_str_log4j_fatal;
 279                 case LTTNG_LOGLEVEL_LOG4J_ERROR:
 280                         return mi_lttng_loglevel_str_log4j_error;
 281                 case LTTNG_LOGLEVEL_LOG4J_WARN:
 282                         return mi_lttng_loglevel_str_log4j_warn;
 283                 case LTTNG_LOGLEVEL_LOG4J_INFO:
 284                         return mi_lttng_loglevel_str_log4j_info;
 285                 case LTTNG_LOGLEVEL_LOG4J_DEBUG:
 286                         return mi_lttng_loglevel_str_log4j_debug;
 287                 case LTTNG_LOGLEVEL_LOG4J_TRACE:
 288                         return mi_lttng_loglevel_str_log4j_trace;
 289                 case LTTNG_LOGLEVEL_LOG4J_ALL:
 290                         return mi_lttng_loglevel_str_log4j_all;
 291                 default:
 292                         return mi_lttng_loglevel_str_unknown;
 293                 }
 294                 break;
 295         case LTTNG_DOMAIN_JUL:
 296                 switch (value) {
 297                 case -1:
 298                         return mi_lttng_element_empty;
 299                 case LTTNG_LOGLEVEL_JUL_OFF:
 300                         return mi_lttng_loglevel_str_jul_off;
 301                 case LTTNG_LOGLEVEL_JUL_SEVERE:
 302                         return mi_lttng_loglevel_str_jul_severe;
 303                 case LTTNG_LOGLEVEL_JUL_WARNING:
 304                         return mi_lttng_loglevel_str_jul_warning;
 305                 case LTTNG_LOGLEVEL_JUL_INFO:
 306                         return mi_lttng_loglevel_str_jul_info;
 307                 case LTTNG_LOGLEVEL_JUL_CONFIG:
 308                         return mi_lttng_loglevel_str_jul_config;
 309                 case LTTNG_LOGLEVEL_JUL_FINE:
 310                         return mi_lttng_loglevel_str_jul_fine;
 311                 case LTTNG_LOGLEVEL_JUL_FINER:
 312                         return mi_lttng_loglevel_str_jul_finer;
 313                 case LTTNG_LOGLEVEL_JUL_FINEST:
 314                         return mi_lttng_loglevel_str_jul_finest;
 315                 case LTTNG_LOGLEVEL_JUL_ALL:
 316                         return mi_lttng_loglevel_str_jul_all;
 317                 default:
 318                         return mi_lttng_loglevel_str_unknown;
 319                 }
 320                 break;
 321         case LTTNG_DOMAIN_PYTHON:
 322                 switch (value) {
 323                 case LTTNG_LOGLEVEL_PYTHON_CRITICAL:
 324                         return mi_lttng_loglevel_str_python_critical;
 325                 case LTTNG_LOGLEVEL_PYTHON_ERROR:
 326                         return mi_lttng_loglevel_str_python_error;
 327                 case LTTNG_LOGLEVEL_PYTHON_WARNING:
 328                         return mi_lttng_loglevel_str_python_warning;
 329                 case LTTNG_LOGLEVEL_PYTHON_INFO:
 330                         return mi_lttng_loglevel_str_python_info;
 331                 case LTTNG_LOGLEVEL_PYTHON_DEBUG:
 332                         return mi_lttng_loglevel_str_python_debug;
 333                 case LTTNG_LOGLEVEL_PYTHON_NOTSET:
 334                         return mi_lttng_loglevel_str_python_notset;
 335                 default:
 336                         return mi_lttng_loglevel_str_unknown;
 337                 }
 338                 break;
 339         default:
 340                 return mi_lttng_loglevel_str_unknown;
 341         }
 342 }
 343
 344 LTTNG_HIDDEN
 345 const char *mi_lttng_logleveltype_string(enum lttng_loglevel_type value)
 346 {
 347         switch (value) {
 348         case LTTNG_EVENT_LOGLEVEL_ALL:
 349                 return mi_lttng_loglevel_type_all;
 350         case LTTNG_EVENT_LOGLEVEL_RANGE:
 351                 return mi_lttng_loglevel_type_range;
 352         case LTTNG_EVENT_LOGLEVEL_SINGLE:
 353                 return mi_lttng_loglevel_type_single;
 354         default:
 355                 return mi_lttng_loglevel_type_unknown;
 356         }
 357 }
 358
 359 static
 360 const char *mi_lttng_eventtype_string(enum lttng_event_type value)
 361 {
 362         switch (value) {
 363         case LTTNG_EVENT_ALL:
 364                 return config_event_type_all;
 365         case LTTNG_EVENT_TRACEPOINT:
 366                 return config_event_type_tracepoint;
 367         case LTTNG_EVENT_PROBE:
 368                 return config_event_type_probe;
 369         case LTTNG_EVENT_USERSPACE_PROBE:
 370                 return config_event_type_userspace_probe;
 371         case LTTNG_EVENT_FUNCTION:
 372                 return config_event_type_function;
 373         case LTTNG_EVENT_FUNCTION_ENTRY:
 374                 return config_event_type_function_entry;
 375         case LTTNG_EVENT_SYSCALL:
 376                 return config_event_type_syscall;
 377         case LTTNG_EVENT_NOOP:
 378                 return config_event_type_noop;
 379         default:
 380                 return mi_lttng_element_empty;
 381         }
 382 }
 383
 384 static
 385 const char *mi_lttng_event_contexttype_string(enum lttng_event_context_type val)
 386 {
 387         switch (val) {
 388         case LTTNG_EVENT_CONTEXT_PID:
 389                 return config_event_context_pid;
 390         case LTTNG_EVENT_CONTEXT_PROCNAME:
 391                 return config_event_context_procname;
 392         case LTTNG_EVENT_CONTEXT_PRIO:
 393                 return config_event_context_prio;
 394         case LTTNG_EVENT_CONTEXT_NICE:
 395                 return config_event_context_nice;
 396         case LTTNG_EVENT_CONTEXT_VPID:
 397                 return config_event_context_vpid;
 398         case LTTNG_EVENT_CONTEXT_TID:
 399                 return config_event_context_tid;
 400         case LTTNG_EVENT_CONTEXT_VTID:
 401                 return config_event_context_vtid;
 402         case LTTNG_EVENT_CONTEXT_PPID:
 403                 return config_event_context_ppid;
 404         case LTTNG_EVENT_CONTEXT_VPPID:
 405                 return config_event_context_vppid;
 406         case LTTNG_EVENT_CONTEXT_PTHREAD_ID:
 407                 return config_event_context_pthread_id;
 408         case LTTNG_EVENT_CONTEXT_HOSTNAME:
 409                 return config_event_context_hostname;
 410         case LTTNG_EVENT_CONTEXT_IP:
 411                 return config_event_context_ip;
 412         case LTTNG_EVENT_CONTEXT_INTERRUPTIBLE:
 413                 return config_event_context_interruptible;
 414         case LTTNG_EVENT_CONTEXT_PREEMPTIBLE:
 415                 return config_event_context_preemptible;
 416         case LTTNG_EVENT_CONTEXT_NEED_RESCHEDULE:
 417                 return config_event_context_need_reschedule;
 418         case LTTNG_EVENT_CONTEXT_MIGRATABLE:
 419                 return config_event_context_migratable;
 420         case LTTNG_EVENT_CONTEXT_CALLSTACK_USER:
 421                 return config_event_context_callstack_user;
 422         case LTTNG_EVENT_CONTEXT_CALLSTACK_KERNEL:
 423                 return config_event_context_callstack_kernel;
 424         case LTTNG_EVENT_CONTEXT_CGROUP_NS:
 425                 return config_event_context_cgroup_ns;
 426         case LTTNG_EVENT_CONTEXT_IPC_NS:
 427                 return config_event_context_ipc_ns;
 428         case LTTNG_EVENT_CONTEXT_MNT_NS:
 429                 return config_event_context_mnt_ns;
 430         case LTTNG_EVENT_CONTEXT_NET_NS:
 431                 return config_event_context_net_ns;
 432         case LTTNG_EVENT_CONTEXT_PID_NS:
 433                 return config_event_context_pid_ns;
 434         case LTTNG_EVENT_CONTEXT_TIME_NS:
 435                 return config_event_context_time_ns;
 436         case LTTNG_EVENT_CONTEXT_USER_NS:
 437                 return config_event_context_user_ns;
 438         case LTTNG_EVENT_CONTEXT_UTS_NS:
 439                 return config_event_context_uts_ns;
 440         case LTTNG_EVENT_CONTEXT_UID:
 441                 return config_event_context_uid;
 442         case LTTNG_EVENT_CONTEXT_EUID:
 443                 return config_event_context_euid;
 444         case LTTNG_EVENT_CONTEXT_SUID:
 445                 return config_event_context_suid;
 446         case LTTNG_EVENT_CONTEXT_GID:
 447                 return config_event_context_gid;
 448         case LTTNG_EVENT_CONTEXT_EGID:
 449                 return config_event_context_egid;
 450         case LTTNG_EVENT_CONTEXT_SGID:
 451                 return config_event_context_sgid;
 452         case LTTNG_EVENT_CONTEXT_VUID:
 453                 return config_event_context_vuid;
 454         case LTTNG_EVENT_CONTEXT_VEUID:
 455                 return config_event_context_veuid;
 456         case LTTNG_EVENT_CONTEXT_VSUID:
 457                 return config_event_context_vsuid;
 458         case LTTNG_EVENT_CONTEXT_VGID:
 459                 return config_event_context_vgid;
 460         case LTTNG_EVENT_CONTEXT_VEGID:
 461                 return config_event_context_vegid;
 462         case LTTNG_EVENT_CONTEXT_VSGID:
 463                 return config_event_context_vsgid;
 464         default:
 465                 return NULL;
 466         }
 467 }
 468
 469 LTTNG_HIDDEN
 470 const char *mi_lttng_eventfieldtype_string(enum lttng_event_field_type val)
 471 {
 472         switch (val) {
 473         case(LTTNG_EVENT_FIELD_INTEGER):
 474                 return mi_lttng_element_type_integer;
 475         case(LTTNG_EVENT_FIELD_ENUM):
 476                 return mi_lttng_element_type_enum;
 477         case(LTTNG_EVENT_FIELD_FLOAT):
 478                 return mi_lttng_element_type_float;
 479         case(LTTNG_EVENT_FIELD_STRING):
 480                 return mi_lttng_element_type_string;
 481         default:
 482                 return mi_lttng_element_type_other;
 483         }
 484 }
 485
 486 LTTNG_HIDDEN
 487 const char *mi_lttng_domaintype_string(enum lttng_domain_type value)
 488 {
 489         /* Note: This is a *duplicate* of get_domain_str from bin/lttng/utils.c */
 490         switch (value) {
 491         case LTTNG_DOMAIN_KERNEL:
 492                 return config_domain_type_kernel;
 493         case LTTNG_DOMAIN_UST:
 494                 return config_domain_type_ust;
 495         case LTTNG_DOMAIN_JUL:
 496                 return config_domain_type_jul;
 497         case LTTNG_DOMAIN_LOG4J:
 498                 return config_domain_type_log4j;
 499         case LTTNG_DOMAIN_PYTHON:
 500                 return config_domain_type_python;
 501         default:
 502                 /* Should not have an unknown domain */
 503                 assert(0);
 504                 return NULL;
 505         }
 506 }
 507
 508 LTTNG_HIDDEN
 509 const char *mi_lttng_buffertype_string(enum lttng_buffer_type value)
 510 {
 511         switch (value) {
 512         case LTTNG_BUFFER_PER_PID:
 513                 return config_buffer_type_per_pid;
 514         case LTTNG_BUFFER_PER_UID:
 515                 return config_buffer_type_per_uid;
 516         case LTTNG_BUFFER_GLOBAL:
 517                 return config_buffer_type_global;
 518         default:
 519                 /* Should not have an unknow buffer type */
 520                 assert(0);
 521                 return NULL;
 522         }
 523 }
 524
 525 LTTNG_HIDDEN
 526 const char *mi_lttng_rotation_state_string(enum lttng_rotation_state value)
 527 {
 528         switch (value) {
 529         case LTTNG_ROTATION_STATE_ONGOING:
 530                 return mi_lttng_rotation_state_str_ongoing;
 531         case LTTNG_ROTATION_STATE_COMPLETED:
 532                 return mi_lttng_rotation_state_str_completed;
 533         case LTTNG_ROTATION_STATE_EXPIRED:
 534                 return mi_lttng_rotation_state_str_expired;
 535         case LTTNG_ROTATION_STATE_ERROR:
 536                 return mi_lttng_rotation_state_str_error;
 537         default:
 538                 /* Should not have an unknow rotation state. */
 539                 assert(0);
 540                 return NULL;
 541         }
 542 }
 543
 544 LTTNG_HIDDEN
 545 const char *mi_lttng_trace_archive_location_relay_protocol_type_string(
 546                 enum lttng_trace_archive_location_relay_protocol_type value)
 547 {
 548         switch (value) {
 549         case LTTNG_TRACE_ARCHIVE_LOCATION_RELAY_PROTOCOL_TYPE_TCP:
 550                 return mi_lttng_rotation_location_relay_protocol_str_tcp;
 551         default:
 552                 /* Should not have an unknow relay protocol. */
 553                 assert(0);
 554                 return NULL;
 555         }
 556 }
 557
 558 LTTNG_HIDDEN
 559 struct mi_writer *mi_lttng_writer_create(int fd_output, int mi_output_type)
 560 {
 561         struct mi_writer *mi_writer;
 562
 563         mi_writer = zmalloc(sizeof(struct mi_writer));
 564         if (!mi_writer) {
 565                 PERROR("zmalloc mi_writer_create");
 566                 goto end;
 567         }
 568         if (mi_output_type == LTTNG_MI_XML) {
 569                 mi_writer->writer = config_writer_create(fd_output, 0);
 570                 if (!mi_writer->writer) {
 571                         goto err_destroy;
 572                 }
 573                 mi_writer->type = LTTNG_MI_XML;
 574         } else {
 575                 goto err_destroy;
 576         }
 577
 578 end:
 579         return mi_writer;
 580
 581 err_destroy:
 582         free(mi_writer);
 583         return NULL;
 584 }
 585
 586 LTTNG_HIDDEN
 587 int mi_lttng_writer_destroy(struct mi_writer *writer)
 588 {
 589         int ret;
 590
 591         if (!writer) {
 592                 ret = -EINVAL;
 593                 goto end;
 594         }
 595
 596         ret = config_writer_destroy(writer->writer);
 597         if (ret < 0) {
 598                 goto end;
 599         }
 600
 601         free(writer);
 602 end:
 603         return ret;
 604 }
 605
 606 LTTNG_HIDDEN
 607 int mi_lttng_writer_command_open(struct mi_writer *writer, const char *command)
 608 {
 609         int ret;
 610
 611         /*
 612          * A command is always the MI's root node, it must declare the current
 613          * namespace and schema URIs and the schema's version.
 614          */
 615         ret = config_writer_open_element(writer->writer,
 616                         mi_lttng_element_command);
 617         if (ret) {
 618                 goto end;
 619         }
 620
 621         ret = config_writer_write_attribute(writer->writer,
 622                         mi_lttng_xmlns, DEFAULT_LTTNG_MI_NAMESPACE);
 623         if (ret) {
 624                 goto end;
 625         }
 626
 627         ret = config_writer_write_attribute(writer->writer,
 628                         mi_lttng_xmlns_xsi, mi_lttng_w3_schema_uri);
 629         if (ret) {
 630                 goto end;
 631         }
 632
 633         ret = config_writer_write_attribute(writer->writer,
 634                         mi_lttng_schema_location,
 635                         mi_lttng_schema_location_uri);
 636         if (ret) {
 637                 goto end;
 638         }
 639
 640         ret = config_writer_write_attribute(writer->writer,
 641                         mi_lttng_schema_version,
 642                         mi_lttng_schema_version_value);
 643         if (ret) {
 644                 goto end;
 645         }
 646
 647         ret = mi_lttng_writer_write_element_string(writer,
 648                         mi_lttng_element_command_name, command);
 649 end:
 650         return ret;
 651 }
 652
 653 LTTNG_HIDDEN
 654 int mi_lttng_writer_command_close(struct mi_writer *writer)
 655 {
 656         return mi_lttng_writer_close_element(writer);
 657 }
 658
 659 LTTNG_HIDDEN
 660 int mi_lttng_writer_open_element(struct mi_writer *writer,
 661                 const char *element_name)
 662 {
 663         return config_writer_open_element(writer->writer, element_name);
 664 }
 665
 666 LTTNG_HIDDEN
 667 int mi_lttng_writer_close_element(struct mi_writer *writer)
 668 {
 669         return config_writer_close_element(writer->writer);
 670 }
 671
 672 LTTNG_HIDDEN
 673 int mi_lttng_close_multi_element(struct mi_writer *writer,
 674                 unsigned int nb_element)
 675 {
 676         int ret, i;
 677
 678         if (nb_element < 1) {
 679                 ret = 0;
 680                 goto end;
 681         }
 682         for (i = 0; i < nb_element; i++) {
 683                 ret = mi_lttng_writer_close_element(writer);
 684                 if (ret) {
 685                         goto end;
 686                 }
 687         }
 688 end:
 689         return ret;
 690 }
 691
 692 LTTNG_HIDDEN
 693 int mi_lttng_writer_write_element_unsigned_int(struct mi_writer *writer,
 694                 const char *element_name, uint64_t value)
 695 {
 696         return config_writer_write_element_unsigned_int(writer->writer,
 697                         element_name, value);
 698 }
 699
 700 LTTNG_HIDDEN
 701 int mi_lttng_writer_write_element_signed_int(struct mi_writer *writer,
 702                 const char *element_name, int64_t value)
 703 {
 704         return config_writer_write_element_signed_int(writer->writer,
 705                         element_name, value);
 706 }
 707
 708 LTTNG_HIDDEN
 709 int mi_lttng_writer_write_element_bool(struct mi_writer *writer,
 710                 const char *element_name, int value)
 711 {
 712         return config_writer_write_element_bool(writer->writer,
 713                         element_name, value);
 714 }
 715
 716 LTTNG_HIDDEN
 717 int mi_lttng_writer_write_element_string(struct mi_writer *writer,
 718                 const char *element_name, const char *value)
 719 {
 720         return config_writer_write_element_string(writer->writer,
 721                         element_name, value);
 722 }
 723
 724 LTTNG_HIDDEN
 725 int mi_lttng_version(struct mi_writer *writer, struct mi_lttng_version *version,
 726         const char *lttng_description, const char *lttng_license)
 727 {
 728         int ret;
 729
 730         /* Open version */
 731         ret = mi_lttng_writer_open_element(writer, mi_lttng_element_version);
 732         if (ret) {
 733                 goto end;
 734         }
 735
 736         /* Version string (contain info like rc etc.) */
 737         ret = mi_lttng_writer_write_element_string(writer,
 738                         mi_lttng_element_version_str, version->version);
 739         if (ret) {
 740                 goto end;
 741         }
 742
 743         /* Major version number */
 744         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 745                         mi_lttng_element_version_major, version->version_major);
 746         if (ret) {
 747                 goto end;
 748         }
 749
 750         /* Minor version number */
 751         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 752                         mi_lttng_element_version_minor, version->version_minor);
 753         if (ret) {
 754                 goto end;
 755         }
 756
 757         /* Commit version number */
 758         ret = mi_lttng_writer_write_element_string(writer,
 759                         mi_lttng_element_version_commit, version->version_commit);
 760         if (ret) {
 761                 goto end;
 762         }
 763
 764         /* Patch number */
 765         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 766                         mi_lttng_element_version_patch_level, version->version_patchlevel);
 767         if (ret) {
 768                 goto end;
 769         }
 770
 771         /* Name of the version */
 772         ret = mi_lttng_writer_write_element_string(writer,
 773                         config_element_name, version->version_name);
 774         if (ret) {
 775                 goto end;
 776         }
 777
 778         /* Description mostly related to beer... */
 779         ret = mi_lttng_writer_write_element_string(writer,
 780                         mi_lttng_element_version_description, lttng_description);
 781         if (ret) {
 782                 goto end;
 783         }
 784
 785         /* url */
 786         ret = mi_lttng_writer_write_element_string(writer,
 787                         mi_lttng_element_version_web, version->package_url);
 788         if (ret) {
 789                 goto end;
 790         }
 791
 792         /* License: free as in free beer...no...*speech* */
 793         ret = mi_lttng_writer_write_element_string(writer,
 794                         mi_lttng_element_version_license, lttng_license);
 795         if (ret) {
 796                 goto end;
 797         }
 798
 799         /* Close version element */
 800         ret = mi_lttng_writer_close_element(writer);
 801
 802 end:
 803         return ret;
 804 }
 805
 806 LTTNG_HIDDEN
 807 int mi_lttng_sessions_open(struct mi_writer *writer)
 808 {
 809         return mi_lttng_writer_open_element(writer, config_element_sessions);
 810 }
 811
 812 LTTNG_HIDDEN
 813 int mi_lttng_session(struct mi_writer *writer,
 814                 struct lttng_session *session, int is_open)
 815 {
 816         int ret;
 817
 818         assert(session);
 819
 820         /* Open sessions element */
 821         ret = mi_lttng_writer_open_element(writer,
 822                         config_element_session);
 823         if (ret) {
 824                 goto end;
 825         }
 826
 827         /* Name of the session */
 828         ret = mi_lttng_writer_write_element_string(writer,
 829                         config_element_name, session->name);
 830         if (ret) {
 831                 goto end;
 832         }
 833
 834         /* Path */
 835         ret = mi_lttng_writer_write_element_string(writer,
 836                         config_element_path, session->path);
 837         if (ret) {
 838                 goto end;
 839         }
 840
 841         /* Enabled ? */
 842         ret = mi_lttng_writer_write_element_bool(writer,
 843                         config_element_enabled, session->enabled);
 844         if (ret) {
 845                 goto end;
 846         }
 847
 848         /* Snapshot mode */
 849         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 850                         config_element_snapshot_mode, session->snapshot_mode);
 851         if (ret) {
 852                 goto end;
 853         }
 854
 855         /* Live timer interval in usec */
 856         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 857                         config_element_live_timer_interval,
 858                         session->live_timer_interval);
 859         if (ret) {
 860                 goto end;
 861         }
 862
 863         if (!is_open) {
 864                 /* Closing session element */
 865                 ret = mi_lttng_writer_close_element(writer);
 866         }
 867 end:
 868         return ret;
 869
 870 }
 871
 872 LTTNG_HIDDEN
 873 int mi_lttng_domains_open(struct mi_writer *writer)
 874 {
 875         return mi_lttng_writer_open_element(writer, config_element_domains);
 876 }
 877
 878 LTTNG_HIDDEN
 879 int mi_lttng_domain(struct mi_writer *writer,
 880                 struct lttng_domain *domain, int is_open)
 881 {
 882         int ret = 0;
 883         const char *str_domain;
 884         const char *str_buffer;
 885
 886         assert(domain);
 887
 888         /* Open domain element */
 889         ret = mi_lttng_writer_open_element(writer, config_element_domain);
 890         if (ret) {
 891                 goto end;
 892         }
 893
 894         /* Domain Type */
 895         str_domain = mi_lttng_domaintype_string(domain->type);
 896         ret = mi_lttng_writer_write_element_string(writer, config_element_type,
 897                         str_domain);
 898         if (ret) {
 899                 goto end;
 900         }
 901
 902         /* Buffer Type */
 903         str_buffer= mi_lttng_buffertype_string(domain->buf_type);
 904         ret = mi_lttng_writer_write_element_string(writer,
 905                         config_element_buffer_type, str_buffer);
 906         if (ret) {
 907                 goto end;
 908         }
 909
 910         /* TODO: union  attr
 911          * This union is not currently used and was added for
 912          * future ust domain support.
 913          * Date: 25-06-2014
 914          * */
 915
 916         if (!is_open) {
 917                 /* Closing domain element */
 918                 ret = mi_lttng_writer_close_element(writer);
 919         }
 920
 921 end:
 922         return ret;
 923
 924 }
 925
 926 LTTNG_HIDDEN
 927 int mi_lttng_channels_open(struct mi_writer *writer)
 928 {
 929         return mi_lttng_writer_open_element(writer, config_element_channels);
 930 }
 931
 932 LTTNG_HIDDEN
 933 int mi_lttng_channel(struct mi_writer *writer,
 934                 struct lttng_channel *channel, int is_open)
 935 {
 936         int ret = 0;
 937
 938         assert(channel);
 939
 940         /* Opening channel element */
 941         ret = mi_lttng_writer_open_element(writer, config_element_channel);
 942         if (ret) {
 943                 goto end;
 944         }
 945
 946         /* Name */
 947         ret = mi_lttng_writer_write_element_string(writer, config_element_name,
 948                         channel->name);
 949         if (ret) {
 950                 goto end;
 951         }
 952
 953         /* Enabled ? */
 954         ret = mi_lttng_writer_write_element_bool(writer,
 955                         config_element_enabled, channel->enabled);
 956         if (ret) {
 957                 goto end;
 958         }
 959
 960         /* Attribute */
 961         ret = mi_lttng_channel_attr(writer, &channel->attr);
 962         if (ret) {
 963                 goto end;
 964         }
 965
 966         if (!is_open) {
 967                 /* Closing channel element */
 968                 ret = mi_lttng_writer_close_element(writer);
 969                 if (ret) {
 970                         goto end;
 971                 }
 972         }
 973 end:
 974         return ret;
 975 }
 976
 977 LTTNG_HIDDEN
 978 int mi_lttng_channel_attr(struct mi_writer *writer,
 979                 struct lttng_channel_attr *attr)
 980 {
 981         int ret = 0;
 982         struct lttng_channel *chan = caa_container_of(attr,
 983                         struct lttng_channel, attr);
 984         uint64_t discarded_events, lost_packets, monitor_timer_interval;
 985         int64_t blocking_timeout;
 986
 987         assert(attr);
 988
 989         ret = lttng_channel_get_discarded_event_count(chan, &discarded_events);
 990         if (ret) {
 991                 goto end;
 992         }
 993
 994         ret = lttng_channel_get_lost_packet_count(chan, &lost_packets);
 995         if (ret) {
 996                 goto end;
 997         }
 998
 999         ret = lttng_channel_get_monitor_timer_interval(chan,
1000                         &monitor_timer_interval);
1001         if (ret) {
1002                 goto end;
1003         }
1004
1005         ret = lttng_channel_get_blocking_timeout(chan,
1006                         &blocking_timeout);
1007         if (ret) {
1008                 goto end;
1009         }
1010
1011         /* Opening Attributes */
1012         ret = mi_lttng_writer_open_element(writer, config_element_attributes);
1013         if (ret) {
1014                 goto end;
1015         }
1016
1017         /* Overwrite */
1018         ret = mi_lttng_writer_write_element_string(writer,
1019                 config_element_overwrite_mode,
1020                 attr->overwrite ? config_overwrite_mode_overwrite :
1021                         config_overwrite_mode_discard);
1022         if (ret) {
1023                 goto end;
1024         }
1025
1026         /* Sub buffer size in byte */
1027         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1028                 config_element_subbuf_size, attr->subbuf_size);
1029         if (ret) {
1030                 goto end;
1031         }
1032
1033         /* Number of subbuffer (power of two) */
1034         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1035                 config_element_num_subbuf,
1036                 attr->num_subbuf);
1037         if (ret) {
1038                 goto end;
1039         }
1040
1041         /* Switch timer interval in usec */
1042         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1043                 config_element_switch_timer_interval,
1044                 attr->switch_timer_interval);
1045         if (ret) {
1046                 goto end;
1047         }
1048
1049         /* Read timer interval in usec */
1050         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1051                 config_element_read_timer_interval,
1052                 attr->read_timer_interval);
1053         if (ret) {
1054                 goto end;
1055         }
1056
1057         /* Monitor timer interval in usec */
1058         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1059                 config_element_monitor_timer_interval,
1060                 monitor_timer_interval);
1061         if (ret) {
1062                 goto end;
1063         }
1064
1065         /* Retry timeout in usec */
1066         ret = mi_lttng_writer_write_element_signed_int(writer,
1067                 config_element_blocking_timeout,
1068                 blocking_timeout);
1069         if (ret) {
1070                 goto end;
1071         }
1072
1073         /* Event output */
1074         ret = mi_lttng_writer_write_element_string(writer,
1075                 config_element_output_type,
1076                 attr->output == LTTNG_EVENT_SPLICE ?
1077                 config_output_type_splice : config_output_type_mmap);
1078         if (ret) {
1079                 goto end;
1080         }
1081
1082         /* Tracefile size in bytes */
1083         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1084                 config_element_tracefile_size, attr->tracefile_size);
1085         if (ret) {
1086                 goto end;
1087         }
1088
1089         /* Count of tracefiles */
1090         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1091                 config_element_tracefile_count,
1092                 attr->tracefile_count);
1093         if (ret) {
1094                 goto end;
1095         }
1096
1097         /* Live timer interval in usec*/
1098         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1099                 config_element_live_timer_interval,
1100                 attr->live_timer_interval);
1101         if (ret) {
1102                 goto end;
1103         }
1104
1105         /* Discarded events */
1106         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1107                 config_element_discarded_events,
1108                 discarded_events);
1109         if (ret) {
1110                 goto end;
1111         }
1112
1113         /* Lost packets */
1114         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1115                 config_element_lost_packets,
1116                 lost_packets);
1117         if (ret) {
1118                 goto end;
1119         }
1120
1121         /* Closing attributes */
1122         ret = mi_lttng_writer_close_element(writer);
1123         if (ret) {
1124                 goto end;
1125         }
1126 end:
1127         return ret;
1128
1129 }
1130
1131 LTTNG_HIDDEN
1132 int mi_lttng_event_common_attributes(struct mi_writer *writer,
1133                 struct lttng_event *event)
1134 {
1135         int ret;
1136         const char *filter_expression;
1137
1138         /* Open event element */
1139         ret = mi_lttng_writer_open_element(writer, config_element_event);
1140         if (ret) {
1141                 goto end;
1142         }
1143
1144         /* Event name */
1145         ret = mi_lttng_writer_write_element_string(writer,
1146                         config_element_name, event->name);
1147         if (ret) {
1148                 goto end;
1149         }
1150
1151         /* Event type */
1152         ret = mi_lttng_writer_write_element_string(writer,
1153                         config_element_type, mi_lttng_eventtype_string(event->type));
1154         if (ret) {
1155                 goto end;
1156         }
1157
1158         /* Is event enabled */
1159         ret = mi_lttng_writer_write_element_bool(writer,
1160                         config_element_enabled, event->enabled);
1161         if (ret) {
1162                 goto end;
1163         }
1164
1165         /* Event filter expression */
1166         ret = lttng_event_get_filter_expression(event, &filter_expression);
1167         if (ret) {
1168                 goto end;
1169         }
1170
1171         if (filter_expression) {
1172                 ret = mi_lttng_writer_write_element_string(writer,
1173                                 config_element_filter_expression,
1174                                 filter_expression);
1175                 if (ret) {
1176                         goto end;
1177                 }
1178         }
1179
1180 end:
1181         return ret;
1182 }
1183
1184 static int write_event_exclusions(struct mi_writer *writer,
1185                 struct lttng_event *event)
1186 {
1187         int i;
1188         int ret;
1189         int exclusion_count;
1190
1191         /* Open event exclusions */
1192         ret = mi_lttng_writer_open_element(writer, config_element_exclusions);
1193         if (ret) {
1194                 goto end;
1195         }
1196
1197         exclusion_count = lttng_event_get_exclusion_name_count(event);
1198         if (exclusion_count < 0) {
1199                 ret = exclusion_count;
1200                 goto end;
1201         }
1202
1203         for (i = 0; i < exclusion_count; i++) {
1204                 const char *name;
1205
1206                 ret = lttng_event_get_exclusion_name(event, i, &name);
1207                 if (ret) {
1208                         /* Close exclusions */
1209                         mi_lttng_writer_close_element(writer);
1210                         goto end;
1211                 }
1212
1213                 ret = mi_lttng_writer_write_element_string(writer,
1214                                 config_element_exclusion, name);
1215                 if (ret) {
1216                         /* Close exclusions */
1217                         mi_lttng_writer_close_element(writer);
1218                         goto end;
1219                 }
1220         }
1221
1222         /* Close exclusions */
1223         ret = mi_lttng_writer_close_element(writer);
1224
1225 end:
1226         return ret;
1227 }
1228
1229 LTTNG_HIDDEN
1230 int mi_lttng_event_tracepoint_loglevel(struct mi_writer *writer,
1231                 struct lttng_event *event, enum lttng_domain_type domain)
1232 {
1233         int ret;
1234
1235         /* Event loglevel */
1236         ret = mi_lttng_writer_write_element_string(writer,
1237                         config_element_loglevel,
1238                         mi_lttng_loglevel_string(event->loglevel, domain));
1239         if (ret) {
1240                 goto end;
1241         }
1242
1243         /* Log level type */
1244         ret = mi_lttng_writer_write_element_string(writer,
1245                         config_element_loglevel_type,
1246                         mi_lttng_logleveltype_string(event->loglevel_type));
1247         if (ret) {
1248                 goto end;
1249         }
1250
1251         /* Event exclusions */
1252         ret = write_event_exclusions(writer, event);
1253
1254 end:
1255         return ret;
1256 }
1257
1258 LTTNG_HIDDEN
1259 int mi_lttng_event_tracepoint_no_loglevel(struct mi_writer *writer,
1260                 struct lttng_event *event)
1261 {
1262         /* event exclusion filter */
1263         return write_event_exclusions(writer, event);
1264 }
1265
1266 LTTNG_HIDDEN
1267 int mi_lttng_event_function_probe(struct mi_writer *writer,
1268                 struct lttng_event *event)
1269 {
1270         int ret;
1271
1272         ret = mi_lttng_writer_open_element(writer, config_element_attributes);
1273         if (ret) {
1274                 goto end;
1275         }
1276
1277         ret = mi_lttng_writer_open_element(writer, config_element_probe_attributes);
1278         if (ret) {
1279                 goto end;
1280         }
1281
1282         if (event->attr.probe.addr != 0) {
1283                 /* event probe address */
1284                 ret = mi_lttng_writer_write_element_unsigned_int(writer,
1285                                 config_element_address, event->attr.probe.addr);
1286                 if (ret) {
1287                         goto end;
1288                 }
1289         } else {
1290                 /* event probe offset */
1291                 ret = mi_lttng_writer_write_element_unsigned_int(writer,
1292                                 config_element_offset, event->attr.probe.offset);
1293                 if (ret) {
1294                         goto end;
1295                 }
1296
1297                 /* event probe symbol_name */
1298                 ret = mi_lttng_writer_write_element_string(writer,
1299                                 config_element_symbol_name, event->attr.probe.symbol_name);
1300                 if (ret) {
1301                         goto end;
1302                 }
1303         }
1304
1305         /* Close probe_attributes and attributes */
1306         ret = mi_lttng_close_multi_element(writer, 2);
1307 end:
1308         return ret;
1309 }
1310
1311 static
1312 int mi_lttng_event_userspace_probe(struct mi_writer *writer,
1313                 struct lttng_event *event)
1314 {
1315         int ret;
1316         const struct lttng_userspace_probe_location *location;
1317         const struct lttng_userspace_probe_location_lookup_method *lookup_method;
1318         enum lttng_userspace_probe_location_lookup_method_type lookup_type;
1319
1320         location = lttng_event_get_userspace_probe_location(event);
1321         if (!location) {
1322                 ret = -LTTNG_ERR_INVALID;
1323                 goto end;
1324         }
1325
1326         lookup_method = lttng_userspace_probe_location_get_lookup_method(location);
1327         if (!lookup_method) {
1328                 ret = -LTTNG_ERR_INVALID;
1329                 goto end;
1330         }
1331
1332         lookup_type = lttng_userspace_probe_location_lookup_method_get_type(lookup_method);
1333
1334         ret = mi_lttng_writer_open_element(writer, config_element_attributes);
1335         if (ret) {
1336                 goto end;
1337         }
1338
1339         switch (lttng_userspace_probe_location_get_type(location)) {
1340         case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION:
1341         {
1342                 const char *function_name;
1343                 const char *binary_path;
1344
1345                 ret = mi_lttng_writer_open_element(writer,
1346                                 config_element_userspace_probe_function_attributes);
1347                 if (ret) {
1348                         goto end;
1349                 }
1350
1351                 switch (lookup_type) {
1352                 case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF:
1353                         ret = mi_lttng_writer_write_element_string(writer,
1354                                         config_element_userspace_probe_lookup,
1355                                         config_element_userspace_probe_lookup_function_elf);
1356                         if (ret) {
1357                                 goto end;
1358                         }
1359                         break;
1360                 case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_DEFAULT:
1361                         ret = mi_lttng_writer_write_element_string(writer,
1362                                         config_element_userspace_probe_lookup,
1363                                         config_element_userspace_probe_lookup_function_default);
1364                         if (ret) {
1365                                 goto end;
1366                         }
1367                         break;
1368                 default:
1369                         goto end;
1370                 }
1371
1372                 binary_path = lttng_userspace_probe_location_function_get_binary_path(location);
1373                 ret = mi_lttng_writer_write_element_string(writer,
1374                                 config_element_userspace_probe_location_binary_path, binary_path);
1375                 if (ret) {
1376                         goto end;
1377                 }
1378
1379                 function_name = lttng_userspace_probe_location_function_get_function_name(location);
1380                 ret = mi_lttng_writer_write_element_string(writer,
1381                                 config_element_userspace_probe_function_location_function_name,
1382                                 function_name);
1383                 if (ret) {
1384                         goto end;
1385                 }
1386
1387                 break;
1388         }
1389         case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT:
1390         {
1391                 const char *probe_name, *provider_name;
1392                 const char *binary_path;
1393
1394                 ret = mi_lttng_writer_open_element(writer,
1395                                 config_element_userspace_probe_function_attributes);
1396                 if (ret) {
1397                         goto end;
1398                 }
1399
1400                 switch (lookup_type) {
1401                 case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT:
1402                         ret = mi_lttng_writer_write_element_string(writer,
1403                                         config_element_userspace_probe_lookup,
1404                                         config_element_userspace_probe_lookup_tracepoint_sdt);
1405                         if (ret) {
1406                                 goto end;
1407                         }
1408                         break;
1409                 default:
1410                         goto end;
1411                 }
1412
1413                 binary_path = lttng_userspace_probe_location_tracepoint_get_binary_path(location);
1414                 ret = mi_lttng_writer_write_element_string(writer,
1415                                 config_element_userspace_probe_location_binary_path,
1416                                 binary_path);
1417                 if (ret) {
1418                         goto end;
1419                 }
1420
1421                 provider_name = lttng_userspace_probe_location_tracepoint_get_provider_name(location);
1422                 ret = mi_lttng_writer_write_element_string(writer,
1423                                 config_element_userspace_probe_tracepoint_location_provider_name,
1424                                 provider_name);
1425                 if (ret) {
1426                         goto end;
1427                 }
1428
1429                 probe_name = lttng_userspace_probe_location_tracepoint_get_probe_name(location);
1430                 ret = mi_lttng_writer_write_element_string(writer,
1431                                 config_element_userspace_probe_tracepoint_location_probe_name, probe_name);
1432                 if (ret) {
1433                         goto end;
1434                 }
1435                 break;
1436         }
1437         default:
1438                 ERR("Invalid probe type encountered");
1439         }
1440         /* Close probe_attributes and attributes */
1441         ret = mi_lttng_close_multi_element(writer, 2);
1442 end:
1443         return ret;
1444 }
1445
1446 LTTNG_HIDDEN
1447 int mi_lttng_event_function_entry(struct mi_writer *writer,
1448                 struct lttng_event *event)
1449 {
1450         int ret;
1451
1452         ret = mi_lttng_writer_open_element(writer, config_element_attributes);
1453         if (ret) {
1454                 goto end;
1455         }
1456
1457         ret = mi_lttng_writer_open_element(writer, config_element_probe_attributes);
1458         if (ret) {
1459                 goto end;
1460         }
1461
1462         /* event probe symbol_name */
1463         ret = mi_lttng_writer_write_element_string(writer,
1464                         config_element_symbol_name, event->attr.ftrace.symbol_name);
1465         if (ret) {
1466                 goto end;
1467         }
1468
1469         /* Close function_attributes and attributes */
1470         ret = mi_lttng_close_multi_element(writer, 2);
1471 end:
1472         return ret;
1473 }
1474
1475 LTTNG_HIDDEN
1476 int mi_lttng_events_open(struct mi_writer *writer)
1477 {
1478         return mi_lttng_writer_open_element(writer, config_element_events);
1479 }
1480
1481 LTTNG_HIDDEN
1482 int mi_lttng_event(struct mi_writer *writer,
1483                 struct lttng_event *event, int is_open, enum lttng_domain_type domain)
1484 {
1485         int ret;
1486
1487         ret = mi_lttng_event_common_attributes(writer, event);
1488         if (ret) {
1489                 goto end;
1490         }
1491
1492         switch (event->type) {
1493         case LTTNG_EVENT_TRACEPOINT:
1494         {
1495                 if (event->loglevel != -1) {
1496                         ret = mi_lttng_event_tracepoint_loglevel(writer, event, domain);
1497                 } else {
1498                         ret = mi_lttng_event_tracepoint_no_loglevel(writer, event);
1499                 }
1500                 break;
1501         }
1502         case LTTNG_EVENT_FUNCTION:
1503                 /* Fallthrough */
1504         case LTTNG_EVENT_PROBE:
1505                 ret = mi_lttng_event_function_probe(writer, event);
1506                 break;
1507         case LTTNG_EVENT_FUNCTION_ENTRY:
1508                 ret = mi_lttng_event_function_entry(writer, event);
1509                 break;
1510         case LTTNG_EVENT_USERSPACE_PROBE:
1511                 ret = mi_lttng_event_userspace_probe(writer, event);
1512                 break;
1513         case LTTNG_EVENT_ALL:
1514                 /* Fallthrough */
1515         default:
1516                 break;
1517         }
1518
1519         if (ret) {
1520                 goto end;
1521         }
1522
1523         if (!is_open) {
1524                 ret = mi_lttng_writer_close_element(writer);
1525         }
1526
1527 end:
1528         return ret;
1529 }
1530
1531 LTTNG_HIDDEN
1532 int mi_lttng_trackers_open(struct mi_writer *writer)
1533 {
1534         return mi_lttng_writer_open_element(
1535                         writer, config_element_process_attr_trackers);
1536 }
1537
1538 static int get_tracker_elements(enum lttng_process_attr process_attr,
1539                 const char **element_process_attr_tracker,
1540                 const char **element_process_attr_value)
1541 {
1542         int ret = 0;
1543
1544         switch (process_attr) {
1545         case LTTNG_PROCESS_ATTR_PROCESS_ID:
1546                 *element_process_attr_tracker =
1547                                 config_element_process_attr_tracker_pid;
1548                 *element_process_attr_value =
1549                                 config_element_process_attr_pid_value;
1550                 break;
1551         case LTTNG_PROCESS_ATTR_VIRTUAL_PROCESS_ID:
1552                 *element_process_attr_tracker =
1553                                 config_element_process_attr_tracker_vpid;
1554                 *element_process_attr_value =
1555                                 config_element_process_attr_vpid_value;
1556                 break;
1557         case LTTNG_PROCESS_ATTR_USER_ID:
1558                 *element_process_attr_tracker =
1559                                 config_element_process_attr_tracker_uid;
1560                 *element_process_attr_value =
1561                                 config_element_process_attr_uid_value;
1562                 break;
1563         case LTTNG_PROCESS_ATTR_VIRTUAL_USER_ID:
1564                 *element_process_attr_tracker =
1565                                 config_element_process_attr_tracker_vuid;
1566                 *element_process_attr_value =
1567                                 config_element_process_attr_vuid_value;
1568                 break;
1569         case LTTNG_PROCESS_ATTR_GROUP_ID:
1570                 *element_process_attr_tracker =
1571                                 config_element_process_attr_tracker_gid;
1572                 *element_process_attr_value =
1573                                 config_element_process_attr_gid_value;
1574                 break;
1575         case LTTNG_PROCESS_ATTR_VIRTUAL_GROUP_ID:
1576                 *element_process_attr_tracker =
1577                                 config_element_process_attr_tracker_vgid;
1578                 *element_process_attr_value =
1579                                 config_element_process_attr_vgid_value;
1580                 break;
1581         default:
1582                 ret = LTTNG_ERR_SAVE_IO_FAIL;
1583         }
1584         return ret;
1585 }
1586
1587 LTTNG_HIDDEN
1588 int mi_lttng_process_attribute_tracker_open(
1589                 struct mi_writer *writer, enum lttng_process_attr process_attr)
1590 {
1591         int ret;
1592         const char *element_tracker, *element_value;
1593
1594         ret = get_tracker_elements(
1595                         process_attr, &element_tracker, &element_value);
1596         if (ret) {
1597                 return ret;
1598         }
1599
1600         /* Open process attribute tracker element */
1601         ret = mi_lttng_writer_open_element(writer, element_tracker);
1602         if (ret) {
1603                 goto end;
1604         }
1605
1606         /* Open values element */
1607         ret = mi_lttng_process_attr_values_open(writer);
1608 end:
1609         return ret;
1610 }
1611
1612 LTTNG_HIDDEN
1613 int mi_lttng_pids_open(struct mi_writer *writer)
1614 {
1615         return mi_lttng_writer_open_element(writer, config_element_pids);
1616 }
1617
1618 /*
1619  * TODO: move the listing of pid for user agent to process semantic on
1620  * mi api bump. The use of process element break the mi api.
1621  */
1622 LTTNG_HIDDEN
1623 int mi_lttng_pid(struct mi_writer *writer,
1624                 pid_t pid,
1625                 const char *name,
1626                 int is_open)
1627 {
1628         int ret;
1629
1630         /* Open pid process */
1631         ret = mi_lttng_writer_open_element(writer, config_element_pid);
1632         if (ret) {
1633                 goto end;
1634         }
1635
1636         /* Writing pid number */
1637         ret = mi_lttng_writer_write_element_signed_int(writer,
1638                         mi_lttng_element_pid_id, (int)pid);
1639         if (ret) {
1640                 goto end;
1641         }
1642
1643         /* Writing name of the process */
1644         if (name) {
1645                 ret = mi_lttng_writer_write_element_string(writer, config_element_name,
1646                                 name);
1647                 if (ret) {
1648                         goto end;
1649                 }
1650         }
1651
1652         if (!is_open) {
1653                 /* Closing Pid */
1654                 ret = mi_lttng_writer_close_element(writer);
1655         }
1656
1657 end:
1658         return ret;
1659 }
1660
1661 LTTNG_HIDDEN
1662 int mi_lttng_process_attr_values_open(struct mi_writer *writer)
1663 {
1664         return mi_lttng_writer_open_element(
1665                         writer, config_element_process_attr_values);
1666 }
1667
1668 LTTNG_HIDDEN
1669 int mi_lttng_all_process_attribute_value(struct mi_writer *writer,
1670                 enum lttng_process_attr process_attr,
1671                 bool is_open)
1672 {
1673         int ret;
1674         const char *element_id_tracker, *element_target_id;
1675
1676         ret = get_tracker_elements(
1677                         process_attr, &element_id_tracker, &element_target_id);
1678         if (ret) {
1679                 return ret;
1680         }
1681
1682         ret = mi_lttng_writer_open_element(writer, element_target_id);
1683         if (ret) {
1684                 goto end;
1685         }
1686
1687         ret = mi_lttng_writer_open_element(writer, config_element_type);
1688         if (ret) {
1689                 goto end;
1690         }
1691
1692         ret = mi_lttng_writer_write_element_bool(writer, config_element_all, 1);
1693         if (ret) {
1694                 goto end;
1695         }
1696
1697         ret = mi_lttng_writer_close_element(writer);
1698         if (ret) {
1699                 goto end;
1700         }
1701
1702         if (!is_open) {
1703                 ret = mi_lttng_writer_close_element(writer);
1704                 if (ret) {
1705                         goto end;
1706                 }
1707         }
1708 end:
1709         return ret;
1710 }
1711
1712 LTTNG_HIDDEN
1713 int mi_lttng_integral_process_attribute_value(struct mi_writer *writer,
1714                 enum lttng_process_attr process_attr,
1715                 int64_t value,
1716                 bool is_open)
1717 {
1718         int ret;
1719         const char *element_id_tracker, *element_target_id;
1720
1721         ret = get_tracker_elements(
1722                         process_attr, &element_id_tracker, &element_target_id);
1723         if (ret) {
1724                 return ret;
1725         }
1726
1727         ret = mi_lttng_writer_open_element(writer, element_target_id);
1728         if (ret) {
1729                 goto end;
1730         }
1731
1732         ret = mi_lttng_writer_open_element(writer, config_element_type);
1733         if (ret) {
1734                 goto end;
1735         }
1736
1737         ret = mi_lttng_writer_write_element_signed_int(
1738                         writer, config_element_process_attr_id, value);
1739         if (ret) {
1740                 goto end;
1741         }
1742
1743         ret = mi_lttng_writer_close_element(writer);
1744         if (ret) {
1745                 goto end;
1746         }
1747
1748         if (!is_open) {
1749                 ret = mi_lttng_writer_close_element(writer);
1750                 if (ret) {
1751                         goto end;
1752                 }
1753         }
1754
1755 end:
1756         return ret;
1757 }
1758
1759 LTTNG_HIDDEN
1760 int mi_lttng_string_process_attribute_value(struct mi_writer *writer,
1761                 enum lttng_process_attr process_attr,
1762                 const char *value,
1763                 bool is_open)
1764
1765 {
1766         int ret;
1767         const char *element_id_tracker, *element_target_id;
1768
1769         ret = get_tracker_elements(
1770                         process_attr, &element_id_tracker, &element_target_id);
1771         if (ret) {
1772                 return ret;
1773         }
1774
1775         ret = mi_lttng_writer_open_element(writer, element_target_id);
1776         if (ret) {
1777                 goto end;
1778         }
1779
1780         ret = mi_lttng_writer_open_element(writer, config_element_type);
1781         if (ret) {
1782                 goto end;
1783         }
1784
1785         ret = mi_lttng_writer_write_element_string(
1786                         writer, config_element_name, value);
1787         if (ret) {
1788                 goto end;
1789         }
1790
1791         ret = mi_lttng_writer_close_element(writer);
1792         if (ret) {
1793                 goto end;
1794         }
1795
1796         if (!is_open) {
1797                 ret = mi_lttng_writer_close_element(writer);
1798                 if (ret) {
1799                         goto end;
1800                 }
1801         }
1802
1803 end:
1804         return ret;
1805 }
1806
1807 LTTNG_HIDDEN
1808 int mi_lttng_event_fields_open(struct mi_writer *writer)
1809 {
1810         return mi_lttng_writer_open_element(writer, mi_lttng_element_event_fields);
1811 }
1812
1813 LTTNG_HIDDEN
1814 int mi_lttng_event_field(struct mi_writer *writer,
1815                 struct lttng_event_field *field)
1816 {
1817         int ret;
1818
1819         if (!field->field_name[0]) {
1820                 ret = 0;
1821                 goto end;
1822         }
1823
1824         /* Open field */
1825         ret = mi_lttng_writer_open_element(writer, mi_lttng_element_event_field);
1826         if (ret) {
1827                 goto end;
1828         }
1829
1830         if (!field->field_name[0]) {
1831                 goto close;
1832         }
1833
1834         /* Name */
1835         ret = mi_lttng_writer_write_element_string(writer, config_element_name,
1836                         field->field_name);
1837         if (ret) {
1838                 goto end;
1839         }
1840
1841         /* Type */
1842         ret = mi_lttng_writer_write_element_string(writer, config_element_type,
1843                         mi_lttng_eventfieldtype_string(field->type));
1844         if (ret) {
1845                 goto end;
1846         }
1847
1848         /* nowrite  */
1849         ret = mi_lttng_writer_write_element_signed_int(writer,
1850                         mi_lttng_element_nowrite, field->nowrite);
1851         if (ret) {
1852                 goto end;
1853         }
1854
1855 close:
1856         /* Close field element */
1857         ret = mi_lttng_writer_close_element(writer);
1858
1859 end:
1860         return ret;
1861 }
1862
1863 LTTNG_HIDDEN
1864 int mi_lttng_perf_counter_context(struct mi_writer *writer,
1865                 struct lttng_event_perf_counter_ctx  *perf_context)
1866 {
1867         int ret;
1868
1869         /* Open perf_counter_context */
1870         ret = mi_lttng_writer_open_element(writer,
1871                         mi_lttng_element_perf_counter_context);
1872         if (ret) {
1873                 goto end;
1874         }
1875
1876         /* Type */
1877         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1878                         config_element_type, perf_context->type);
1879         if (ret) {
1880                 goto end;
1881         }
1882
1883         /* Config */
1884         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1885                         config_element_config, perf_context->config);
1886         if (ret) {
1887                 goto end;
1888         }
1889
1890         /* Name of the perf counter */
1891         ret = mi_lttng_writer_write_element_string(writer,
1892                         config_element_name, perf_context->name);
1893         if (ret) {
1894                 goto end;
1895         }
1896
1897         /* Close perf_counter_context */
1898         ret = mi_lttng_writer_close_element(writer);
1899 end:
1900         return ret;
1901 }
1902
1903 static
1904 int mi_lttng_app_context(struct mi_writer *writer,
1905                 const char *provider_name, const char *ctx_name)
1906 {
1907         int ret;
1908
1909         /* Open app */
1910         ret = mi_lttng_writer_open_element(writer,
1911                         config_element_context_app);
1912         if (ret) {
1913                 goto end;
1914         }
1915
1916         /* provider_name */
1917         ret = mi_lttng_writer_write_element_string(writer,
1918                         config_element_context_app_provider_name,
1919                         provider_name);
1920         if (ret) {
1921                 goto end;
1922         }
1923
1924         /* ctx_name */
1925         ret = mi_lttng_writer_write_element_string(writer,
1926                         config_element_context_app_ctx_name, ctx_name);
1927         if (ret) {
1928                 goto end;
1929         }
1930
1931         /* Close app */
1932         ret = mi_lttng_writer_close_element(writer);
1933 end:
1934         return ret;
1935 }
1936
1937 LTTNG_HIDDEN
1938 int mi_lttng_context(struct mi_writer *writer,
1939                 struct lttng_event_context *context, int is_open)
1940 {
1941         int ret;
1942
1943         /* Open context */
1944         ret = mi_lttng_writer_open_element(writer , config_element_context);
1945         if (ret) {
1946                 goto end;
1947         }
1948
1949         /* Special case for PERF_*_COUNTER
1950          * print the lttng_event_perf_counter_ctx*/
1951         switch (context->ctx) {
1952         case LTTNG_EVENT_CONTEXT_PERF_COUNTER:
1953         case LTTNG_EVENT_CONTEXT_PERF_THREAD_COUNTER:
1954         case LTTNG_EVENT_CONTEXT_PERF_CPU_COUNTER:
1955         {
1956                 struct lttng_event_perf_counter_ctx *perf_context =
1957                                 &context->u.perf_counter;
1958                 ret =  mi_lttng_perf_counter_context(writer, perf_context);
1959                 if (ret) {
1960                         goto end;
1961                 }
1962                 break;
1963         }
1964         case LTTNG_EVENT_CONTEXT_APP_CONTEXT:
1965         {
1966                 ret = mi_lttng_app_context(writer,
1967                                 context->u.app_ctx.provider_name,
1968                                 context->u.app_ctx.ctx_name);
1969                 if (ret) {
1970                         goto end;
1971                 }
1972                 break;
1973         }
1974         default:
1975         {
1976                 const char *type_string = mi_lttng_event_contexttype_string(
1977                                 context->ctx);
1978                 if (!type_string) {
1979                         ret = -LTTNG_ERR_INVALID;
1980                         goto end;
1981                 }
1982
1983                 /* Print context type */
1984                 ret = mi_lttng_writer_write_element_string(writer,
1985                                 config_element_type, type_string);
1986                 break;
1987         }
1988         }
1989
1990         /* Close context */
1991         if (!is_open) {
1992                 ret = mi_lttng_writer_close_element(writer);
1993         }
1994
1995 end:
1996         return ret;
1997 }
1998
1999 LTTNG_HIDDEN
2000 int mi_lttng_snapshot_output_session_name(struct mi_writer *writer,
2001                 const char *session_name)
2002 {
2003         int ret;
2004
2005         /* Open session element */
2006         ret = mi_lttng_writer_open_element(writer, config_element_session);
2007         if (ret) {
2008                 goto end;
2009         }
2010
2011         /* Snapshot output list for current session name */
2012         ret = mi_lttng_writer_write_element_string(writer, config_element_name,
2013                         session_name);
2014         if (ret) {
2015                 goto end;
2016         }
2017
2018         /* Open element snapshots (sequence one snapshot) */
2019         ret = mi_lttng_writer_open_element(writer, mi_lttng_element_snapshots);
2020         if (ret) {
2021                 goto end;
2022         }
2023
2024 end:
2025         return ret;
2026 }
2027
2028 LTTNG_HIDDEN
2029 int mi_lttng_snapshot_list_output(struct mi_writer *writer,
2030                 struct lttng_snapshot_output *output)
2031 {
2032         int ret;
2033
2034         /* Open element snapshot output */
2035         ret = mi_lttng_writer_open_element(writer,
2036                         mi_lttng_element_command_snapshot);
2037         if (ret) {
2038                 goto end;
2039         }
2040
2041         /* ID of the snapshot output */
2042         ret = mi_lttng_writer_write_element_unsigned_int(writer,
2043                         mi_lttng_element_id, output->id);
2044         if (ret) {
2045                 goto end;
2046         }
2047
2048         /* Name of the output */
2049         ret = mi_lttng_writer_write_element_string(writer, config_element_name,
2050                         output->name);
2051         if (ret) {
2052                 goto end;
2053         }
2054
2055         /* Destination of the output (ctrl_url)*/
2056         ret = mi_lttng_writer_write_element_string(writer,
2057                         mi_lttng_element_snapshot_ctrl_url, output->ctrl_url);
2058         if (ret) {
2059                 goto end;
2060         }
2061
2062         /* Destination of the output (data_url) */
2063         ret = mi_lttng_writer_write_element_string(writer,
2064                         mi_lttng_element_snapshot_data_url, output->data_url);
2065         if (ret) {
2066                 goto end;
2067         }
2068
2069         /* total size of all stream combined */
2070         ret = mi_lttng_writer_write_element_unsigned_int(writer,
2071                         mi_lttng_element_snapshot_max_size, output->max_size);
2072         if (ret) {
2073                 goto end;
2074         }
2075
2076         /* Close snapshot output element */
2077         ret = mi_lttng_writer_close_element(writer);
2078
2079 end:
2080         return ret;
2081 }
2082
2083 LTTNG_HIDDEN
2084 int mi_lttng_snapshot_del_output(struct mi_writer *writer, int id,
2085                 const char *name, const char *current_session_name)
2086 {
2087         int ret;
2088
2089         /* Open element del_snapshot */
2090         ret = mi_lttng_writer_open_element(writer,
2091                         mi_lttng_element_command_snapshot);
2092         if (ret) {
2093                 goto end;
2094         }
2095
2096
2097         if (id != UINT32_MAX) {
2098                 /* "Snapshot output "id" successfully deleted
2099                  * for "current_session_name"
2100                  * ID of the snapshot output
2101                  */
2102                 ret = mi_lttng_writer_write_element_unsigned_int(writer,
2103                                 mi_lttng_element_id, id);
2104                 if (ret) {
2105                         goto end;
2106                 }
2107         } else {
2108                 /* "Snapshot output "name" successfully deleted
2109                  * for session "current_session_name"
2110                  * Name of the output
2111                  */
2112                 ret = mi_lttng_writer_write_element_string(writer, config_element_name,
2113                                 name);
2114                 if (ret) {
2115                         goto end;
2116                 }
2117         }
2118
2119         /* Snapshot was deleted for session "current_session_name"*/
2120         ret = mi_lttng_writer_write_element_string(writer,
2121                         mi_lttng_element_snapshot_session_name,
2122                         current_session_name);
2123         if (ret) {
2124                 goto end;
2125         }
2126
2127         /* Close snapshot element */
2128         ret = mi_lttng_writer_close_element(writer);
2129
2130 end:
2131         return ret;
2132 }
2133
2134 LTTNG_HIDDEN
2135 int mi_lttng_snapshot_add_output(struct mi_writer *writer,
2136                 const char *current_session_name, const char *n_ptr,
2137                 struct lttng_snapshot_output *output)
2138 {
2139         int ret;
2140
2141         /* Open element snapshot */
2142         ret = mi_lttng_writer_open_element(writer,
2143                         mi_lttng_element_command_snapshot);
2144         if (ret) {
2145                 goto end;
2146         }
2147
2148         /* Snapshot output id */
2149         ret = mi_lttng_writer_write_element_unsigned_int(writer,
2150                         mi_lttng_element_id, output->id);
2151         if (ret) {
2152                 goto end;
2153         }
2154
2155         /* Snapshot output names */
2156         ret = mi_lttng_writer_write_element_string(writer,
2157                         config_element_name, n_ptr);
2158         if (ret) {
2159                 goto end;
2160         }
2161
2162         /* Destination of the output (ctrl_url)*/
2163         ret = mi_lttng_writer_write_element_string(writer,
2164                         mi_lttng_element_snapshot_ctrl_url, output->ctrl_url);
2165         if (ret) {
2166                 goto end;
2167         }
2168
2169         /* Snapshot added for session "current_session_name"*/
2170         ret = mi_lttng_writer_write_element_string(writer,
2171                         mi_lttng_element_snapshot_session_name, current_session_name);
2172         if (ret) {
2173                 goto end;
2174         }
2175
2176         /* total size of all stream combined */
2177         ret = mi_lttng_writer_write_element_unsigned_int(writer,
2178                         mi_lttng_element_snapshot_max_size, output->max_size);
2179         if (ret) {
2180                 goto end;
2181         }
2182
2183         /* Close snapshot element */
2184         ret = mi_lttng_writer_close_element(writer);
2185
2186 end:
2187         return ret;
2188 }
2189
2190 LTTNG_HIDDEN
2191 int mi_lttng_snapshot_record(struct mi_writer *writer,
2192                 const char *current_session_name, const char *url,
2193                 const char *cmdline_ctrl_url, const char *cmdline_data_url)
2194 {
2195         int ret;
2196
2197         /* Open element snapshot */
2198         ret = mi_lttng_writer_open_element(writer,
2199                         mi_lttng_element_command_snapshot);
2200         if (ret) {
2201                 goto end;
2202         }
2203
2204         /*
2205          * If a valid an URL was given, serialize it,
2206          * else take the command line data and ctrl urls*/
2207         if (url) {
2208                 /* Destination of the output (ctrl_url)*/
2209                 ret = mi_lttng_writer_write_element_string(writer,
2210                                 mi_lttng_element_snapshot_ctrl_url, url);
2211                 if (ret) {
2212                         goto end;
2213                 }
2214         } else if (cmdline_ctrl_url) {
2215                 /* Destination of the output (ctrl_url)*/
2216                 ret = mi_lttng_writer_write_element_string(writer,
2217                                 mi_lttng_element_snapshot_ctrl_url, cmdline_ctrl_url);
2218                 if (ret) {
2219                         goto end;
2220                 }
2221
2222                 /* Destination of the output (data_url) */
2223                 ret = mi_lttng_writer_write_element_string(writer,
2224                                 mi_lttng_element_snapshot_data_url, cmdline_data_url);
2225                 if (ret) {
2226                         goto end;
2227                 }
2228         }
2229
2230         /* Close record_snapshot element */
2231         ret = mi_lttng_writer_close_element(writer);
2232
2233 end:
2234         return ret;
2235 }
2236
2237 LTTNG_HIDDEN
2238 int mi_lttng_rotation_schedule(struct mi_writer *writer,
2239                 const struct lttng_rotation_schedule *schedule)
2240 {
2241         int ret = 0;
2242         enum lttng_rotation_status status;
2243         uint64_t value;
2244         const char *element_name;
2245         const char *value_name;
2246         bool empty_schedule = false;
2247
2248         switch (lttng_rotation_schedule_get_type(schedule)) {
2249         case LTTNG_ROTATION_SCHEDULE_TYPE_PERIODIC:
2250                 status = lttng_rotation_schedule_periodic_get_period(schedule,
2251                                 &value);
2252                 element_name = mi_lttng_element_rotation_schedule_periodic;
2253                 value_name = mi_lttng_element_rotation_schedule_periodic_time_us;
2254                 break;
2255         case LTTNG_ROTATION_SCHEDULE_TYPE_SIZE_THRESHOLD:
2256                 status = lttng_rotation_schedule_size_threshold_get_threshold(
2257                                 schedule, &value);
2258                 element_name = mi_lttng_element_rotation_schedule_size_threshold;
2259                 value_name = mi_lttng_element_rotation_schedule_size_threshold_bytes;
2260                 break;
2261         default:
2262                 ret = -1;
2263                 goto end;
2264         }
2265
2266         if (status != LTTNG_ROTATION_STATUS_OK) {
2267                 if (status == LTTNG_ROTATION_STATUS_UNAVAILABLE) {
2268                         empty_schedule = true;
2269                 } else {
2270                         ret = -1;
2271                         goto end;
2272                 }
2273         }
2274
2275         ret = mi_lttng_writer_open_element(writer, element_name);
2276         if (ret) {
2277                 goto end;
2278         }
2279
2280         if (!empty_schedule) {
2281                 ret = mi_lttng_writer_write_element_unsigned_int(writer,
2282                                 value_name, value);
2283                 if (ret) {
2284                         goto end;
2285                 }
2286         }
2287
2288         /* Close schedule descriptor element. */
2289         ret = mi_lttng_writer_close_element(writer);
2290         if (ret) {
2291                 goto end;
2292         }
2293 end:
2294         return ret;
2295 }
2296
2297 LTTNG_HIDDEN
2298 int mi_lttng_rotation_schedule_result(struct mi_writer *writer,
2299                 const struct lttng_rotation_schedule *schedule,
2300                 bool success)
2301 {
2302         int ret = 0;
2303
2304         ret = mi_lttng_writer_open_element(writer,
2305                         mi_lttng_element_rotation_schedule_result);
2306         if (ret) {
2307                 goto end;
2308         }
2309
2310         ret = mi_lttng_writer_open_element(writer,
2311                         mi_lttng_element_rotation_schedule);
2312         if (ret) {
2313                 goto end;
2314         }
2315
2316         ret = mi_lttng_rotation_schedule(writer, schedule);
2317         if (ret) {
2318                 goto end;
2319         }
2320
2321         /* Close rotation_schedule element */
2322         ret = mi_lttng_writer_close_element(writer);
2323         if (ret) {
2324                 goto end;
2325         }
2326
2327         ret = mi_lttng_writer_write_element_bool(writer,
2328                         mi_lttng_element_command_success, success);
2329         if (ret) {
2330                 goto end;
2331         }
2332
2333         /* Close rotation_schedule_result element */
2334         ret = mi_lttng_writer_close_element(writer);
2335         if (ret) {
2336                 goto end;
2337         }
2338 end:
2339         return ret;
2340 }
2341
2342 static
2343 int mi_lttng_location(struct mi_writer *writer,
2344                 const struct lttng_trace_archive_location *location)
2345 {
2346         int ret = 0;
2347         enum lttng_trace_archive_location_type location_type;
2348         enum lttng_trace_archive_location_status status;
2349
2350         location_type = lttng_trace_archive_location_get_type(location);
2351
2352         switch (location_type) {
2353         case LTTNG_TRACE_ARCHIVE_LOCATION_TYPE_LOCAL:
2354         {
2355                 const char *absolute_path;
2356
2357                 status = lttng_trace_archive_location_local_get_absolute_path(
2358                                 location, &absolute_path);
2359                 if (status != LTTNG_TRACE_ARCHIVE_LOCATION_STATUS_OK) {
2360                         ret = -1;
2361                         goto end;
2362                 }
2363
2364                 ret = mi_lttng_writer_open_element(writer,
2365                                 mi_lttng_element_rotation_location_local);
2366                 if (ret) {
2367                         goto end;
2368                 }
2369
2370
2371                 ret = mi_lttng_writer_write_element_string(writer,
2372                                 mi_lttng_element_rotation_location_local_absolute_path,
2373                                 absolute_path);
2374                 if (ret) {
2375                         goto end;
2376                 }
2377
2378                 /* Close local element */
2379                 ret = mi_lttng_writer_close_element(writer);
2380                 if (ret) {
2381                         goto end;
2382                 }
2383                 break;
2384         }
2385         case LTTNG_TRACE_ARCHIVE_LOCATION_TYPE_RELAY:
2386         {
2387                 uint16_t control_port, data_port;
2388                 const char *host, *relative_path;
2389                 enum lttng_trace_archive_location_relay_protocol_type protocol;
2390
2391                 /* Fetch all relay location parameters. */
2392                 status = lttng_trace_archive_location_relay_get_protocol_type(
2393                                 location, &protocol);
2394                 if (status != LTTNG_TRACE_ARCHIVE_LOCATION_STATUS_OK) {
2395                         ret = -1;
2396                         goto end;
2397                 }
2398
2399                 status = lttng_trace_archive_location_relay_get_host(
2400                                 location, &host);
2401                 if (status != LTTNG_TRACE_ARCHIVE_LOCATION_STATUS_OK) {
2402                         ret = -1;
2403                         goto end;
2404                 }
2405
2406                 status = lttng_trace_archive_location_relay_get_control_port(
2407                                 location, &control_port);
2408                 if (status != LTTNG_TRACE_ARCHIVE_LOCATION_STATUS_OK) {
2409                         ret = -1;
2410                         goto end;
2411                 }
2412
2413                 status = lttng_trace_archive_location_relay_get_data_port(
2414                                 location, &data_port);
2415                 if (status != LTTNG_TRACE_ARCHIVE_LOCATION_STATUS_OK) {
2416                         ret = -1;
2417                         goto end;
2418                 }
2419
2420                 status = lttng_trace_archive_location_relay_get_relative_path(
2421                                 location, &relative_path);
2422                 if (status != LTTNG_TRACE_ARCHIVE_LOCATION_STATUS_OK) {
2423                         ret = -1;
2424                         goto end;
2425                 }
2426
2427                 ret = mi_lttng_writer_open_element(writer,
2428                                 mi_lttng_element_rotation_location_relay);
2429                 if (ret) {
2430                         goto end;
2431                 }
2432
2433                 ret = mi_lttng_writer_write_element_string(writer,
2434                                 mi_lttng_element_rotation_location_relay_host,
2435                                 host);
2436                 if (ret) {
2437                         goto end;
2438                 }
2439
2440                 ret = mi_lttng_writer_write_element_unsigned_int(writer,
2441                                 mi_lttng_element_rotation_location_relay_control_port,
2442                                 control_port);
2443                 if (ret) {
2444                         goto end;
2445                 }
2446
2447                 ret = mi_lttng_writer_write_element_unsigned_int(writer,
2448                                 mi_lttng_element_rotation_location_relay_data_port,
2449                                 data_port);
2450                 if (ret) {
2451                         goto end;
2452                 }
2453
2454                 ret = mi_lttng_writer_write_element_string(writer,
2455                                 mi_lttng_element_rotation_location_relay_protocol,
2456                                 mi_lttng_trace_archive_location_relay_protocol_type_string(protocol));
2457                 if (ret) {
2458                         goto end;
2459                 }
2460
2461                 ret = mi_lttng_writer_write_element_string(writer,
2462                                 mi_lttng_element_rotation_location_relay_relative_path,
2463                                 relative_path);
2464                 if (ret) {
2465                         goto end;
2466                 }
2467
2468                 /* Close relay element */
2469                 ret = mi_lttng_writer_close_element(writer);
2470                 if (ret) {
2471                         goto end;
2472                 }
2473                 break;
2474         }
2475         default:
2476                 abort();
2477         }
2478 end:
2479         return ret;
2480 }
2481
2482 LTTNG_HIDDEN
2483 int mi_lttng_rotate(struct mi_writer *writer,
2484                 const char *session_name,
2485                 enum lttng_rotation_state rotation_state,
2486                 const struct lttng_trace_archive_location *location)
2487 {
2488         int ret;
2489
2490         ret = mi_lttng_writer_open_element(writer,
2491                         mi_lttng_element_rotation);
2492         if (ret) {
2493                 goto end;
2494         }
2495
2496         ret = mi_lttng_writer_write_element_string(writer,
2497                         mi_lttng_element_session_name,
2498                         session_name);
2499         if (ret) {
2500                 goto end;
2501         }
2502
2503         ret = mi_lttng_writer_write_element_string(writer,
2504                         mi_lttng_element_rotation_state,
2505                         mi_lttng_rotation_state_string(rotation_state));
2506         if (ret) {
2507                 goto end;
2508         }
2509
2510         if (!location) {
2511                 /* Not a serialization error. */
2512                 goto close_rotation;
2513         }
2514
2515         ret = mi_lttng_writer_open_element(writer,
2516                         mi_lttng_element_rotation_location);
2517         if (ret) {
2518                 goto end;
2519         }
2520
2521         ret = mi_lttng_location(writer, location);
2522         if (ret) {
2523                 goto close_location;
2524         }
2525
2526 close_location:
2527         /* Close location element */
2528         ret = mi_lttng_writer_close_element(writer);
2529         if (ret) {
2530                 goto end;
2531         }
2532
2533 close_rotation:
2534         /* Close rotation element */
2535         ret = mi_lttng_writer_close_element(writer);
2536         if (ret) {
2537                 goto end;
2538         }
2539 end:
2540         return ret;
2541 }