src/common/mi-lttng.cpp

   1 /*
   2  * Copyright (C) 2014 EfficiOS Inc.
   3  * Copyright (C) 2016 Jérémie Galarneau <jeremie.galarneau@efficios.com>
   4  *
   5  * SPDX-License-Identifier: LGPL-2.1-only
   6  *
   7  */
   8
   9 #include "lttng/tracker.h"
  10 #define _LGPL_SOURCE
  11 #include "mi-lttng.h"
  12 #include <common/config/session-config.h>
  13 #include <common/defaults.h>
  14 #include <common/tracker.h>
  15 #include <lttng/channel.h>
  16 #include <lttng/snapshot-internal.h>
  17
  18
  19 #define MI_SCHEMA_MAJOR_VERSION 4
  20 #define MI_SCHEMA_MINOR_VERSION 1
  21
  22 /* Machine interface namespace URI */
  23 const char * const mi_lttng_xmlns = "xmlns";
  24 const char * const mi_lttng_xmlns_xsi = "xmlns:xsi";
  25 const char * const mi_lttng_w3_schema_uri = "http://www.w3.org/2001/XMLSchema-instance";
  26 const char * const mi_lttng_schema_location = "xsi:schemaLocation";
  27 const char * const mi_lttng_schema_location_uri =
  28         DEFAULT_LTTNG_MI_NAMESPACE " "
  29         "https://lttng.org/xml/schemas/lttng-mi/" XSTR(MI_SCHEMA_MAJOR_VERSION)
  30         "/lttng-mi-" XSTR(MI_SCHEMA_MAJOR_VERSION) "."
  31         XSTR(MI_SCHEMA_MINOR_VERSION) ".xsd";
  32 const char * const mi_lttng_schema_version = "schemaVersion";
  33 const char * const mi_lttng_schema_version_value = XSTR(MI_SCHEMA_MAJOR_VERSION)
  34         "." XSTR(MI_SCHEMA_MINOR_VERSION);
  35
  36 /* Strings related to command */
  37 const char * const mi_lttng_element_command = "command";
  38 const char * const mi_lttng_element_command_action = "snapshot_action";
  39 const char * const mi_lttng_element_command_add_context = "add-context";
  40 const char *const mi_lttng_element_command_add_trigger = "add-trigger";
  41 const char * const mi_lttng_element_command_create = "create";
  42 const char * const mi_lttng_element_command_destroy = "destroy";
  43 const char * const mi_lttng_element_command_disable_channel = "disable-channel";
  44 const char * const mi_lttng_element_command_disable_event = "disable-event";
  45 const char * const mi_lttng_element_command_enable_channels = "enable-channel";
  46 const char * const mi_lttng_element_command_enable_event = "enable-event";
  47 const char * const mi_lttng_element_command_list = "list";
  48 const char *const mi_lttng_element_command_list_trigger = "list-trigger";
  49 const char * const mi_lttng_element_command_load = "load";
  50 const char * const mi_lttng_element_command_metadata = "metadata";
  51 const char * const mi_lttng_element_command_metadata_action = "metadata_action";
  52 const char * const mi_lttng_element_command_regenerate = "regenerate";
  53 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_remove_trigger = "remove-trigger";
  57 const char * const mi_lttng_element_command_save = "save";
  58 const char * const mi_lttng_element_command_set_session = "set-session";
  59 const char * const mi_lttng_element_command_snapshot = "snapshot";
  60 const char * const mi_lttng_element_command_snapshot_add = "add_snapshot";
  61 const char * const mi_lttng_element_command_snapshot_del = "del_snapshot";
  62 const char * const mi_lttng_element_command_snapshot_list = "list_snapshot";
  63 const char * const mi_lttng_element_command_snapshot_record = "record_snapshot";
  64 const char * const mi_lttng_element_command_start = "start";
  65 const char * const mi_lttng_element_command_stop = "stop";
  66 const char * const mi_lttng_element_command_success = "success";
  67 const char * const mi_lttng_element_command_track = "track";
  68 const char * const mi_lttng_element_command_untrack = "untrack";
  69 const char * const mi_lttng_element_command_version = "version";
  70 const char * const mi_lttng_element_command_rotate = "rotate";
  71 const char * const mi_lttng_element_command_enable_rotation = "enable-rotation";
  72 const char * const mi_lttng_element_command_disable_rotation = "disable-rotation";
  73 const char * const mi_lttng_element_command_clear = "clear";
  74
  75 /* Strings related to version command */
  76 const char * const mi_lttng_element_version = "version";
  77 const char * const mi_lttng_element_version_commit = "commit";
  78 const char * const mi_lttng_element_version_description = "description";
  79 const char * const mi_lttng_element_version_license = "license";
  80 const char * const mi_lttng_element_version_major = "major";
  81 const char * const mi_lttng_element_version_minor = "minor";
  82 const char * const mi_lttng_element_version_patch_level = "patchLevel";
  83 const char * const mi_lttng_element_version_str = "string";
  84 const char * const mi_lttng_element_version_web = "url";
  85
  86 /* String related to a lttng_event_field */
  87 const char * const mi_lttng_element_event_field = "event_field";
  88 const char * const mi_lttng_element_event_fields = "event_fields";
  89
  90 /* String related to lttng_event_perf_counter_ctx */
  91 const char * const mi_lttng_element_perf_counter_context = "perf";
  92
  93 /* Strings related to pid */
  94 const char * const mi_lttng_element_pid_id = "id";
  95
  96 /* Strings related to save command */
  97 const char * const mi_lttng_element_save = "save";
  98
  99 /* Strings related to load command */
 100 const char * const mi_lttng_element_load = "load";
 101 const char * const mi_lttng_element_load_overrides = "overrides";
 102 const char * const mi_lttng_element_load_override_url = "url";
 103
 104 /* General elements of mi_lttng */
 105 const char * const mi_lttng_element_empty = "";
 106 const char * const mi_lttng_element_id = "id";
 107 const char * const mi_lttng_element_nowrite = "nowrite";
 108 const char * const mi_lttng_element_success = "success";
 109 const char * const mi_lttng_element_type_enum = "ENUM";
 110 const char * const mi_lttng_element_type_float = "FLOAT";
 111 const char * const mi_lttng_element_type_integer = "INTEGER";
 112 const char * const mi_lttng_element_type_other = "OTHER";
 113 const char * const mi_lttng_element_type_string = "STRING";
 114
 115 /* String related to loglevel */
 116 const char * const mi_lttng_loglevel_str_alert = "TRACE_ALERT";
 117 const char * const mi_lttng_loglevel_str_crit = "TRACE_CRIT";
 118 const char * const mi_lttng_loglevel_str_debug = "TRACE_DEBUG";
 119 const char * const mi_lttng_loglevel_str_debug_function = "TRACE_DEBUG_FUNCTION";
 120 const char * const mi_lttng_loglevel_str_debug_line = "TRACE_DEBUG_LINE";
 121 const char * const mi_lttng_loglevel_str_debug_module = "TRACE_DEBUG_MODULE";
 122 const char * const mi_lttng_loglevel_str_debug_process = "TRACE_DEBUG_PROCESS";
 123 const char * const mi_lttng_loglevel_str_debug_program = "TRACE_DEBUG_PROGRAM";
 124 const char * const mi_lttng_loglevel_str_debug_system = "TRACE_DEBUG_SYSTEM";
 125 const char * const mi_lttng_loglevel_str_debug_unit = "TRACE_DEBUG_UNIT";
 126 const char * const mi_lttng_loglevel_str_emerg = "TRACE_EMERG";
 127 const char * const mi_lttng_loglevel_str_err = "TRACE_ERR";
 128 const char * const mi_lttng_loglevel_str_info = "TRACE_INFO";
 129 const char * const mi_lttng_loglevel_str_notice = "TRACE_NOTICE";
 130 const char * const mi_lttng_loglevel_str_unknown = "UNKNOWN";
 131 const char * const mi_lttng_loglevel_str_warning = "TRACE_WARNING";
 132
 133 /* String related to loglevel JUL */
 134 const char * const mi_lttng_loglevel_str_jul_all = "JUL_ALL";
 135 const char * const mi_lttng_loglevel_str_jul_config = "JUL_CONFIG";
 136 const char * const mi_lttng_loglevel_str_jul_fine = "JUL_FINE";
 137 const char * const mi_lttng_loglevel_str_jul_finer = "JUL_FINER";
 138 const char * const mi_lttng_loglevel_str_jul_finest = "JUL_FINEST";
 139 const char * const mi_lttng_loglevel_str_jul_info = "JUL_INFO";
 140 const char * const mi_lttng_loglevel_str_jul_off = "JUL_OFF";
 141 const char * const mi_lttng_loglevel_str_jul_severe = "JUL_SEVERE";
 142 const char * const mi_lttng_loglevel_str_jul_warning = "JUL_WARNING";
 143
 144 /* String related to loglevel LOG4J */
 145 const char * const mi_lttng_loglevel_str_log4j_off = "LOG4J_OFF";
 146 const char * const mi_lttng_loglevel_str_log4j_fatal = "LOG4J_FATAL";
 147 const char * const mi_lttng_loglevel_str_log4j_error = "LOG4J_ERROR";
 148 const char * const mi_lttng_loglevel_str_log4j_warn = "LOG4J_WARN";
 149 const char * const mi_lttng_loglevel_str_log4j_info = "LOG4J_INFO";
 150 const char * const mi_lttng_loglevel_str_log4j_debug = "LOG4J_DEBUG";
 151 const char * const mi_lttng_loglevel_str_log4j_trace = "LOG4J_TRACE";
 152 const char * const mi_lttng_loglevel_str_log4j_all = "LOG4J_ALL";
 153
 154 /* String related to loglevel Python */
 155 const char * const mi_lttng_loglevel_str_python_critical = "PYTHON_CRITICAL";
 156 const char * const mi_lttng_loglevel_str_python_error = "PYTHON_ERROR";
 157 const char * const mi_lttng_loglevel_str_python_warning = "PYTHON_WARNING";
 158 const char * const mi_lttng_loglevel_str_python_info = "PYTHON_INFO";
 159 const char * const mi_lttng_loglevel_str_python_debug = "PYTHON_DEBUG";
 160 const char * const mi_lttng_loglevel_str_python_notset = "PYTHON_NOTSET";
 161
 162 /* String related to loglevel type */
 163 const char * const mi_lttng_loglevel_type_all = "ALL";
 164 const char * const mi_lttng_loglevel_type_range = "RANGE";
 165 const char * const mi_lttng_loglevel_type_single = "SINGLE";
 166 const char * const mi_lttng_loglevel_type_unknown = "UNKNOWN";
 167
 168 /* String related to a lttng_snapshot_output */
 169 const char * const mi_lttng_element_snapshot_ctrl_url = "ctrl_url";
 170 const char * const mi_lttng_element_snapshot_data_url = "data_url";
 171 const char * const mi_lttng_element_snapshot_max_size = "max_size";
 172 const char * const mi_lttng_element_snapshot_n_ptr = "n_ptr";
 173 const char * const mi_lttng_element_snapshot_session_name = "session_name";
 174 const char * const mi_lttng_element_snapshots = "snapshots";
 175
 176 /* String related to track/untrack command */
 177 const char * const mi_lttng_element_track_untrack_all_wildcard = "*";
 178
 179 const char * const mi_lttng_element_session_name = "session_name";
 180
 181 /* String related to rotate command */
 182 const char * const mi_lttng_element_rotation = "rotation";
 183 const char * const mi_lttng_element_rotate_status = "status";
 184 const char * const mi_lttng_element_rotation_schedule = "rotation_schedule";
 185 const char * const mi_lttng_element_rotation_schedules = "rotation_schedules";
 186 const char * const mi_lttng_element_rotation_schedule_result = "rotation_schedule_result";
 187 const char * const mi_lttng_element_rotation_schedule_results = "rotation_schedule_results";
 188 const char * const mi_lttng_element_rotation_schedule_periodic = "periodic";
 189 const char * const mi_lttng_element_rotation_schedule_periodic_time_us = "time_us";
 190 const char * const mi_lttng_element_rotation_schedule_size_threshold = "size_threshold";
 191 const char * const mi_lttng_element_rotation_schedule_size_threshold_bytes = "bytes";
 192 const char * const mi_lttng_element_rotation_state = "state";
 193 const char * const mi_lttng_element_rotation_location = "location";
 194 const char * const mi_lttng_element_rotation_location_local = "local";
 195 const char * const mi_lttng_element_rotation_location_local_absolute_path = "absolute_path";
 196 const char * const mi_lttng_element_rotation_location_relay = "relay";
 197 const char * const mi_lttng_element_rotation_location_relay_host = "host";
 198 const char * const mi_lttng_element_rotation_location_relay_control_port = "control_port";
 199 const char * const mi_lttng_element_rotation_location_relay_data_port = "data_port";
 200 const char * const mi_lttng_element_rotation_location_relay_protocol = "protocol";
 201 const char * const mi_lttng_element_rotation_location_relay_relative_path = "relative_path";
 202
 203 /* String related to enum lttng_rotation_state */
 204 const char * const mi_lttng_rotation_state_str_ongoing = "ONGOING";
 205 const char * const mi_lttng_rotation_state_str_completed = "COMPLETED";
 206 const char * const mi_lttng_rotation_state_str_expired = "EXPIRED";
 207 const char * const mi_lttng_rotation_state_str_error = "ERROR";
 208
 209 /* String related to enum lttng_trace_archive_location_relay_protocol_type */
 210 const char * const mi_lttng_rotation_location_relay_protocol_str_tcp = "TCP";
 211
 212 /* String related to rate_policy elements */
 213 const char *const mi_lttng_element_rate_policy = "rate_policy";
 214 const char *const mi_lttng_element_rate_policy_every_n =
 215                 "rate_policy_every_n";
 216 const char *const mi_lttng_element_rate_policy_once_after_n =
 217                 "rate_policy_once_after_n";
 218
 219 const char *const mi_lttng_element_rate_policy_every_n_interval =
 220                 "interval";
 221 const char
 222                 *const mi_lttng_element_rate_policy_once_after_n_threshold =
 223                                 "threshold";
 224
 225 /* String related to action elements */
 226 const char *const mi_lttng_element_action = "action";
 227 const char *const mi_lttng_element_action_list = "action_list";
 228 const char *const mi_lttng_element_action_notify = "action_notify";
 229 const char *const mi_lttng_element_action_start_session =
 230                 "action_start_session";
 231 const char *const mi_lttng_element_action_stop_session =
 232                 "action_stop_session";
 233 const char *const mi_lttng_element_action_rotate_session =
 234                 "action_rotate_session";
 235 const char *const mi_lttng_element_action_snapshot_session =
 236                 "action_snapshot_session";
 237 const char *const mi_lttng_element_action_snapshot_session_output =
 238                 "output";
 239
 240 /* String related to condition */
 241 const char *const mi_lttng_element_condition = "condition";
 242 const char *const mi_lttng_element_condition_buffer_usage_high =
 243                 "condition_buffer_usage_high";
 244 const char *const mi_lttng_element_condition_buffer_usage_low =
 245                 "condition_buffer_usage_low";
 246 const char *const mi_lttng_element_condition_event_rule_matches =
 247                 "condition_event_rule_matches";
 248 const char *const mi_lttng_element_condition_session_consumed_size =
 249                 "condition_session_consumed_size";
 250 const char *const mi_lttng_element_condition_session_rotation =
 251                 "condition_session_rotation";
 252 const char
 253                 *const mi_lttng_element_condition_session_rotation_completed =
 254                                 "condition_session_rotation_completed";
 255 const char
 256                 *const mi_lttng_element_condition_session_rotation_ongoing =
 257                                 "condition_session_rotation_ongoing";
 258
 259 const char *const mi_lttng_element_condition_channel_name =
 260                 "channel_name";
 261 const char *const mi_lttng_element_condition_threshold_bytes =
 262                 "threshold_bytes";
 263 const char *const mi_lttng_element_condition_threshold_ratio =
 264                 "threshold_ratio";
 265
 266 /* String related to capture descriptor */
 267 const char *const mi_lttng_element_capture_descriptor =
 268                 "capture_descriptor";
 269 const char *const mi_lttng_element_capture_descriptors =
 270                 "capture_descriptors";
 271
 272 /* String related to event expression */
 273 const char *const mi_lttng_element_event_expr = "event_expr";
 274 const char *const mi_lttng_element_event_expr_payload_field =
 275                 "event_expr_payload_field";
 276 const char *const mi_lttng_element_event_expr_channel_context_field =
 277                 "event_expr_channel_context_field";
 278 const char
 279                 *const mi_lttng_element_event_expr_app_specific_context_field =
 280                                 "event_expr_app_specific_context_field";
 281 const char *const mi_lttng_element_event_expr_array_field_element =
 282                 "event_expr_array_field_element";
 283 const char *const mi_lttng_element_event_expr_provider_name =
 284                 "provider_name";
 285 const char *const mi_lttng_element_event_expr_type_name =
 286                 "type_name";
 287 const char *const mi_lttng_element_event_expr_index = "index";
 288
 289 /* String related to event rule */
 290 const char *const mi_lttng_element_event_rule = "event_rule";
 291
 292 /* String related to lttng_event_rule_type */
 293 const char *const mi_lttng_element_event_rule_event_name =
 294                 "event_name";
 295 const char *const mi_lttng_element_event_rule_name_pattern =
 296                 "name_pattern";
 297 const char *const mi_lttng_element_event_rule_filter_expression =
 298                 "filter_expression";
 299
 300 const char *const mi_lttng_element_event_rule_jul_logging =
 301                 "event_rule_jul_logging";
 302 const char *const mi_lttng_element_event_rule_kernel_kprobe =
 303                 "event_rule_kernel_kprobe";
 304 const char *const mi_lttng_element_event_rule_kernel_syscall =
 305                 "event_rule_kernel_syscall";
 306 const char *const mi_lttng_element_event_rule_kernel_tracepoint =
 307                 "event_rule_kernel_tracepoint";
 308 const char *const mi_lttng_element_event_rule_kernel_uprobe =
 309                 "event_rule_kernel_uprobe";
 310 const char *const mi_lttng_element_event_rule_log4j_logging =
 311                 "event_rule_log4j_logging";
 312 const char *const mi_lttng_element_event_rule_python_logging =
 313                 "event_rule_python_logging";
 314 const char *const mi_lttng_element_event_rule_user_tracepoint =
 315                 "event_rule_user_tracepoint";
 316
 317 /* String related to lttng_event_rule_kernel_syscall. */
 318 const char *const
 319                 mi_lttng_element_event_rule_kernel_syscall_emission_site =
 320                                 "emission_site";
 321
 322 /* String related to enum lttng_event_rule_kernel_syscall_emission_site. */
 323 const char *const
 324                 mi_lttng_event_rule_kernel_syscall_emission_site_entry_exit =
 325                                 "entry+exit";
 326 const char
 327                 *const mi_lttng_event_rule_kernel_syscall_emission_site_entry =
 328                                 "entry";
 329 const char *const
 330                 mi_lttng_event_rule_kernel_syscall_emission_site_exit = "exit";
 331
 332 /* String related to lttng_event_rule_user_tracepoint */
 333 const char *const
 334                 mi_lttng_element_event_rule_user_tracepoint_name_pattern_exclusions =
 335                                 "name_pattern_exclusions";
 336 const char *const
 337                 mi_lttng_element_event_rule_user_tracepoint_name_pattern_exclusion =
 338                                 "name_pattern_exclusion";
 339
 340 /* String related to log level rule. */
 341 const char *const mi_lttng_element_log_level_rule =
 342                 "log_level_rule";
 343 const char *const mi_lttng_element_log_level_rule_exactly =
 344                 "log_level_rule_exactly";
 345 const char
 346                 *const mi_lttng_element_log_level_rule_at_least_as_severe_as =
 347                                 "log_level_rule_at_least_as_severe_as";
 348 const char *const mi_lttng_element_log_level_rule_level = "level";
 349
 350 /* String related to kernel probe location. */
 351 const char *const mi_lttng_element_kernel_probe_location =
 352                 "kernel_probe_location";
 353 const char
 354                 *const mi_lttng_element_kernel_probe_location_symbol_offset =
 355                                 "kernel_probe_location_symbol_offset";
 356 const char *const
 357                 mi_lttng_element_kernel_probe_location_symbol_offset_name =
 358                                 "name";
 359 const char *const
 360                 mi_lttng_element_kernel_probe_location_symbol_offset_offset =
 361                                 "offset";
 362
 363 const char *const mi_lttng_element_kernel_probe_location_address =
 364                 "kernel_probe_location_address";
 365 const char
 366                 *const mi_lttng_element_kernel_probe_location_address_address =
 367                                 "address";
 368
 369 /* String related to userspace probe location. */
 370 const char *const mi_lttng_element_userspace_probe_location =
 371                 "userspace_probe_location";
 372 const char
 373                 *const mi_lttng_element_userspace_probe_location_binary_path =
 374                                 "binary_path";
 375 const char
 376                 *const mi_lttng_element_userspace_probe_location_function =
 377                                 "userspace_probe_location_function";
 378 const char
 379                 *const mi_lttng_element_userspace_probe_location_function_name =
 380                                 "name";
 381 const char
 382                 *const mi_lttng_element_userspace_probe_location_lookup_method =
 383                                 "userspace_probe_location_lookup_method";
 384 const char *const
 385                 mi_lttng_element_userspace_probe_location_lookup_method_function_default =
 386                                 "userspace_probe_location_lookup_method_function_default";
 387 const char *const
 388                 mi_lttng_element_userspace_probe_location_lookup_method_function_elf =
 389                                 "userspace_probe_location_lookup_method_function_elf";
 390 const char *const
 391                 mi_lttng_element_userspace_probe_location_lookup_method_tracepoint_sdt =
 392                                 "userspace_probe_location_lookup_method_tracepoint_sdt";
 393 const char
 394                 *const mi_lttng_element_userspace_probe_location_tracepoint =
 395                                 "userspace_probe_location_tracepoint";
 396 const char *const
 397                 mi_lttng_element_userspace_probe_location_tracepoint_probe_name =
 398                                 "probe_name";
 399 const char *const
 400                 mi_lttng_element_userspace_probe_location_tracepoint_provider_name =
 401                                 "provider_name";
 402
 403 /* String related to enum
 404  * lttng_userspace_probe_location_function_instrumentation_type */
 405 const char *const
 406                 mi_lttng_element_userspace_probe_location_function_instrumentation_type =
 407                                 "instrumentation_type";
 408 const char *const
 409                 mi_lttng_userspace_probe_location_function_instrumentation_type_entry =
 410                                 "ENTRY";
 411
 412 /* String related to trigger */
 413 const char *const mi_lttng_element_triggers = "triggers";
 414 const char *const mi_lttng_element_trigger = "trigger";
 415 const char *const mi_lttng_element_trigger_owner_uid = "owner_uid";
 416
 417 /* String related to error_query. */
 418 const char *const mi_lttng_element_error_query_result =
 419                 "error_query_result";
 420 const char *const mi_lttng_element_error_query_result_counter =
 421                 "error_query_result_counter";
 422 const char *const
 423                 mi_lttng_element_error_query_result_counter_value = "value";
 424 const char *const mi_lttng_element_error_query_result_description =
 425                 "description";
 426 const char *const mi_lttng_element_error_query_result_name =
 427                 "name";
 428 const char *const mi_lttng_element_error_query_result_type =
 429                 "type";
 430 const char *const mi_lttng_element_error_query_results =
 431                 "error_query_results";
 432
 433 /* String related to add-context command */
 434 const char * const mi_lttng_element_context_symbol = "symbol";
 435
 436 /* Deprecated symbols preserved for ABI compatibility. */
 437 LTTNG_EXPORT const char *mi_lttng_context_type_perf_counter;
 438 LTTNG_EXPORT const char *mi_lttng_context_type_perf_cpu_counter;
 439 LTTNG_EXPORT const char *mi_lttng_context_type_perf_thread_counter;
 440 LTTNG_EXPORT const char *mi_lttng_element_track_untrack_pid_target;
 441 LTTNG_EXPORT const char *mi_lttng_element_track_untrack_targets;
 442 LTTNG_EXPORT const char *mi_lttng_element_calibrate;
 443 LTTNG_EXPORT const char *mi_lttng_element_calibrate_function;
 444 LTTNG_EXPORT const char *mi_lttng_element_command_calibrate;
 445
 446 /* This is a merge of jul loglevel and regular loglevel
 447  * Those should never overlap by definition
 448  * (see struct lttng_event loglevel)
 449  */
 450 const char *mi_lttng_loglevel_string(int value, enum lttng_domain_type domain)
 451 {
 452         switch (domain) {
 453         case LTTNG_DOMAIN_KERNEL:
 454         case LTTNG_DOMAIN_UST:
 455                 switch (value) {
 456                 case -1:
 457                         return mi_lttng_element_empty;
 458                 case LTTNG_LOGLEVEL_EMERG:
 459                         return mi_lttng_loglevel_str_emerg;
 460                 case LTTNG_LOGLEVEL_ALERT:
 461                         return mi_lttng_loglevel_str_alert;
 462                 case LTTNG_LOGLEVEL_CRIT:
 463                         return mi_lttng_loglevel_str_crit;
 464                 case LTTNG_LOGLEVEL_ERR:
 465                         return mi_lttng_loglevel_str_err;
 466                 case LTTNG_LOGLEVEL_WARNING:
 467                         return mi_lttng_loglevel_str_warning;
 468                 case LTTNG_LOGLEVEL_NOTICE:
 469                         return mi_lttng_loglevel_str_notice;
 470                 case LTTNG_LOGLEVEL_INFO:
 471                         return mi_lttng_loglevel_str_info;
 472                 case LTTNG_LOGLEVEL_DEBUG_SYSTEM:
 473                         return mi_lttng_loglevel_str_debug_system;
 474                 case LTTNG_LOGLEVEL_DEBUG_PROGRAM:
 475                         return mi_lttng_loglevel_str_debug_program;
 476                 case LTTNG_LOGLEVEL_DEBUG_PROCESS:
 477                         return mi_lttng_loglevel_str_debug_process;
 478                 case LTTNG_LOGLEVEL_DEBUG_MODULE:
 479                         return mi_lttng_loglevel_str_debug_module;
 480                 case LTTNG_LOGLEVEL_DEBUG_UNIT:
 481                         return mi_lttng_loglevel_str_debug_unit;
 482                 case LTTNG_LOGLEVEL_DEBUG_FUNCTION:
 483                         return mi_lttng_loglevel_str_debug_function;
 484                 case LTTNG_LOGLEVEL_DEBUG_LINE:
 485                         return mi_lttng_loglevel_str_debug_line;
 486                 case LTTNG_LOGLEVEL_DEBUG:
 487                         return mi_lttng_loglevel_str_debug;
 488                 default:
 489                         return mi_lttng_loglevel_str_unknown;
 490                 }
 491                 break;
 492         case LTTNG_DOMAIN_LOG4J:
 493                 switch (value) {
 494                 case -1:
 495                         return mi_lttng_element_empty;
 496                 case LTTNG_LOGLEVEL_LOG4J_OFF:
 497                         return mi_lttng_loglevel_str_log4j_off;
 498                 case LTTNG_LOGLEVEL_LOG4J_FATAL:
 499                         return mi_lttng_loglevel_str_log4j_fatal;
 500                 case LTTNG_LOGLEVEL_LOG4J_ERROR:
 501                         return mi_lttng_loglevel_str_log4j_error;
 502                 case LTTNG_LOGLEVEL_LOG4J_WARN:
 503                         return mi_lttng_loglevel_str_log4j_warn;
 504                 case LTTNG_LOGLEVEL_LOG4J_INFO:
 505                         return mi_lttng_loglevel_str_log4j_info;
 506                 case LTTNG_LOGLEVEL_LOG4J_DEBUG:
 507                         return mi_lttng_loglevel_str_log4j_debug;
 508                 case LTTNG_LOGLEVEL_LOG4J_TRACE:
 509                         return mi_lttng_loglevel_str_log4j_trace;
 510                 case LTTNG_LOGLEVEL_LOG4J_ALL:
 511                         return mi_lttng_loglevel_str_log4j_all;
 512                 default:
 513                         return mi_lttng_loglevel_str_unknown;
 514                 }
 515                 break;
 516         case LTTNG_DOMAIN_JUL:
 517                 switch (value) {
 518                 case -1:
 519                         return mi_lttng_element_empty;
 520                 case LTTNG_LOGLEVEL_JUL_OFF:
 521                         return mi_lttng_loglevel_str_jul_off;
 522                 case LTTNG_LOGLEVEL_JUL_SEVERE:
 523                         return mi_lttng_loglevel_str_jul_severe;
 524                 case LTTNG_LOGLEVEL_JUL_WARNING:
 525                         return mi_lttng_loglevel_str_jul_warning;
 526                 case LTTNG_LOGLEVEL_JUL_INFO:
 527                         return mi_lttng_loglevel_str_jul_info;
 528                 case LTTNG_LOGLEVEL_JUL_CONFIG:
 529                         return mi_lttng_loglevel_str_jul_config;
 530                 case LTTNG_LOGLEVEL_JUL_FINE:
 531                         return mi_lttng_loglevel_str_jul_fine;
 532                 case LTTNG_LOGLEVEL_JUL_FINER:
 533                         return mi_lttng_loglevel_str_jul_finer;
 534                 case LTTNG_LOGLEVEL_JUL_FINEST:
 535                         return mi_lttng_loglevel_str_jul_finest;
 536                 case LTTNG_LOGLEVEL_JUL_ALL:
 537                         return mi_lttng_loglevel_str_jul_all;
 538                 default:
 539                         return mi_lttng_loglevel_str_unknown;
 540                 }
 541                 break;
 542         case LTTNG_DOMAIN_PYTHON:
 543                 switch (value) {
 544                 case LTTNG_LOGLEVEL_PYTHON_CRITICAL:
 545                         return mi_lttng_loglevel_str_python_critical;
 546                 case LTTNG_LOGLEVEL_PYTHON_ERROR:
 547                         return mi_lttng_loglevel_str_python_error;
 548                 case LTTNG_LOGLEVEL_PYTHON_WARNING:
 549                         return mi_lttng_loglevel_str_python_warning;
 550                 case LTTNG_LOGLEVEL_PYTHON_INFO:
 551                         return mi_lttng_loglevel_str_python_info;
 552                 case LTTNG_LOGLEVEL_PYTHON_DEBUG:
 553                         return mi_lttng_loglevel_str_python_debug;
 554                 case LTTNG_LOGLEVEL_PYTHON_NOTSET:
 555                         return mi_lttng_loglevel_str_python_notset;
 556                 default:
 557                         return mi_lttng_loglevel_str_unknown;
 558                 }
 559                 break;
 560         default:
 561                 return mi_lttng_loglevel_str_unknown;
 562         }
 563 }
 564
 565 const char *mi_lttng_logleveltype_string(enum lttng_loglevel_type value)
 566 {
 567         switch (value) {
 568         case LTTNG_EVENT_LOGLEVEL_ALL:
 569                 return mi_lttng_loglevel_type_all;
 570         case LTTNG_EVENT_LOGLEVEL_RANGE:
 571                 return mi_lttng_loglevel_type_range;
 572         case LTTNG_EVENT_LOGLEVEL_SINGLE:
 573                 return mi_lttng_loglevel_type_single;
 574         default:
 575                 return mi_lttng_loglevel_type_unknown;
 576         }
 577 }
 578
 579 static
 580 const char *mi_lttng_eventtype_string(enum lttng_event_type value)
 581 {
 582         switch (value) {
 583         case LTTNG_EVENT_ALL:
 584                 return config_event_type_all;
 585         case LTTNG_EVENT_TRACEPOINT:
 586                 return config_event_type_tracepoint;
 587         case LTTNG_EVENT_PROBE:
 588                 return config_event_type_probe;
 589         case LTTNG_EVENT_USERSPACE_PROBE:
 590                 return config_event_type_userspace_probe;
 591         case LTTNG_EVENT_FUNCTION:
 592                 return config_event_type_function;
 593         case LTTNG_EVENT_FUNCTION_ENTRY:
 594                 return config_event_type_function_entry;
 595         case LTTNG_EVENT_SYSCALL:
 596                 return config_event_type_syscall;
 597         case LTTNG_EVENT_NOOP:
 598                 return config_event_type_noop;
 599         default:
 600                 return mi_lttng_element_empty;
 601         }
 602 }
 603
 604 static
 605 const char *mi_lttng_event_contexttype_string(enum lttng_event_context_type val)
 606 {
 607         switch (val) {
 608         case LTTNG_EVENT_CONTEXT_PID:
 609                 return config_event_context_pid;
 610         case LTTNG_EVENT_CONTEXT_PROCNAME:
 611                 return config_event_context_procname;
 612         case LTTNG_EVENT_CONTEXT_PRIO:
 613                 return config_event_context_prio;
 614         case LTTNG_EVENT_CONTEXT_NICE:
 615                 return config_event_context_nice;
 616         case LTTNG_EVENT_CONTEXT_VPID:
 617                 return config_event_context_vpid;
 618         case LTTNG_EVENT_CONTEXT_TID:
 619                 return config_event_context_tid;
 620         case LTTNG_EVENT_CONTEXT_VTID:
 621                 return config_event_context_vtid;
 622         case LTTNG_EVENT_CONTEXT_PPID:
 623                 return config_event_context_ppid;
 624         case LTTNG_EVENT_CONTEXT_VPPID:
 625                 return config_event_context_vppid;
 626         case LTTNG_EVENT_CONTEXT_PTHREAD_ID:
 627                 return config_event_context_pthread_id;
 628         case LTTNG_EVENT_CONTEXT_HOSTNAME:
 629                 return config_event_context_hostname;
 630         case LTTNG_EVENT_CONTEXT_IP:
 631                 return config_event_context_ip;
 632         case LTTNG_EVENT_CONTEXT_INTERRUPTIBLE:
 633                 return config_event_context_interruptible;
 634         case LTTNG_EVENT_CONTEXT_PREEMPTIBLE:
 635                 return config_event_context_preemptible;
 636         case LTTNG_EVENT_CONTEXT_NEED_RESCHEDULE:
 637                 return config_event_context_need_reschedule;
 638         case LTTNG_EVENT_CONTEXT_MIGRATABLE:
 639                 return config_event_context_migratable;
 640         case LTTNG_EVENT_CONTEXT_CALLSTACK_USER:
 641                 return config_event_context_callstack_user;
 642         case LTTNG_EVENT_CONTEXT_CALLSTACK_KERNEL:
 643                 return config_event_context_callstack_kernel;
 644         case LTTNG_EVENT_CONTEXT_CGROUP_NS:
 645                 return config_event_context_cgroup_ns;
 646         case LTTNG_EVENT_CONTEXT_IPC_NS:
 647                 return config_event_context_ipc_ns;
 648         case LTTNG_EVENT_CONTEXT_MNT_NS:
 649                 return config_event_context_mnt_ns;
 650         case LTTNG_EVENT_CONTEXT_NET_NS:
 651                 return config_event_context_net_ns;
 652         case LTTNG_EVENT_CONTEXT_PID_NS:
 653                 return config_event_context_pid_ns;
 654         case LTTNG_EVENT_CONTEXT_TIME_NS:
 655                 return config_event_context_time_ns;
 656         case LTTNG_EVENT_CONTEXT_USER_NS:
 657                 return config_event_context_user_ns;
 658         case LTTNG_EVENT_CONTEXT_UTS_NS:
 659                 return config_event_context_uts_ns;
 660         case LTTNG_EVENT_CONTEXT_UID:
 661                 return config_event_context_uid;
 662         case LTTNG_EVENT_CONTEXT_EUID:
 663                 return config_event_context_euid;
 664         case LTTNG_EVENT_CONTEXT_SUID:
 665                 return config_event_context_suid;
 666         case LTTNG_EVENT_CONTEXT_GID:
 667                 return config_event_context_gid;
 668         case LTTNG_EVENT_CONTEXT_EGID:
 669                 return config_event_context_egid;
 670         case LTTNG_EVENT_CONTEXT_SGID:
 671                 return config_event_context_sgid;
 672         case LTTNG_EVENT_CONTEXT_VUID:
 673                 return config_event_context_vuid;
 674         case LTTNG_EVENT_CONTEXT_VEUID:
 675                 return config_event_context_veuid;
 676         case LTTNG_EVENT_CONTEXT_VSUID:
 677                 return config_event_context_vsuid;
 678         case LTTNG_EVENT_CONTEXT_VGID:
 679                 return config_event_context_vgid;
 680         case LTTNG_EVENT_CONTEXT_VEGID:
 681                 return config_event_context_vegid;
 682         case LTTNG_EVENT_CONTEXT_VSGID:
 683                 return config_event_context_vsgid;
 684         default:
 685                 return NULL;
 686         }
 687 }
 688
 689 const char *mi_lttng_eventfieldtype_string(enum lttng_event_field_type val)
 690 {
 691         switch (val) {
 692         case(LTTNG_EVENT_FIELD_INTEGER):
 693                 return mi_lttng_element_type_integer;
 694         case(LTTNG_EVENT_FIELD_ENUM):
 695                 return mi_lttng_element_type_enum;
 696         case(LTTNG_EVENT_FIELD_FLOAT):
 697                 return mi_lttng_element_type_float;
 698         case(LTTNG_EVENT_FIELD_STRING):
 699                 return mi_lttng_element_type_string;
 700         default:
 701                 return mi_lttng_element_type_other;
 702         }
 703 }
 704
 705 const char *mi_lttng_domaintype_string(enum lttng_domain_type value)
 706 {
 707         switch (value) {
 708         case LTTNG_DOMAIN_KERNEL:
 709                 return config_domain_type_kernel;
 710         case LTTNG_DOMAIN_UST:
 711                 return config_domain_type_ust;
 712         case LTTNG_DOMAIN_JUL:
 713                 return config_domain_type_jul;
 714         case LTTNG_DOMAIN_LOG4J:
 715                 return config_domain_type_log4j;
 716         case LTTNG_DOMAIN_PYTHON:
 717                 return config_domain_type_python;
 718         default:
 719                 /* Should not have an unknown domain */
 720                 abort();
 721                 return NULL;
 722         }
 723 }
 724
 725 const char *mi_lttng_buffertype_string(enum lttng_buffer_type value)
 726 {
 727         switch (value) {
 728         case LTTNG_BUFFER_PER_PID:
 729                 return config_buffer_type_per_pid;
 730         case LTTNG_BUFFER_PER_UID:
 731                 return config_buffer_type_per_uid;
 732         case LTTNG_BUFFER_GLOBAL:
 733                 return config_buffer_type_global;
 734         default:
 735                 /* Should not have an unknow buffer type */
 736                 abort();
 737                 return NULL;
 738         }
 739 }
 740
 741 const char *mi_lttng_rotation_state_string(enum lttng_rotation_state value)
 742 {
 743         switch (value) {
 744         case LTTNG_ROTATION_STATE_ONGOING:
 745                 return mi_lttng_rotation_state_str_ongoing;
 746         case LTTNG_ROTATION_STATE_COMPLETED:
 747                 return mi_lttng_rotation_state_str_completed;
 748         case LTTNG_ROTATION_STATE_EXPIRED:
 749                 return mi_lttng_rotation_state_str_expired;
 750         case LTTNG_ROTATION_STATE_ERROR:
 751                 return mi_lttng_rotation_state_str_error;
 752         default:
 753                 /* Should not have an unknow rotation state. */
 754                 abort();
 755                 return NULL;
 756         }
 757 }
 758
 759 const char *mi_lttng_trace_archive_location_relay_protocol_type_string(
 760                 enum lttng_trace_archive_location_relay_protocol_type value)
 761 {
 762         switch (value) {
 763         case LTTNG_TRACE_ARCHIVE_LOCATION_RELAY_PROTOCOL_TYPE_TCP:
 764                 return mi_lttng_rotation_location_relay_protocol_str_tcp;
 765         default:
 766                 /* Should not have an unknown relay protocol. */
 767                 abort();
 768                 return NULL;
 769         }
 770 }
 771
 772 struct mi_writer *mi_lttng_writer_create(int fd_output, int mi_output_type)
 773 {
 774         struct mi_writer *mi_writer;
 775
 776         mi_writer = (struct mi_writer *) zmalloc(sizeof(struct mi_writer));
 777         if (!mi_writer) {
 778                 PERROR("zmalloc mi_writer_create");
 779                 goto end;
 780         }
 781         if (mi_output_type == LTTNG_MI_XML) {
 782                 mi_writer->writer = config_writer_create(fd_output, 0);
 783                 if (!mi_writer->writer) {
 784                         goto err_destroy;
 785                 }
 786                 mi_writer->type = LTTNG_MI_XML;
 787         } else {
 788                 goto err_destroy;
 789         }
 790
 791 end:
 792         return mi_writer;
 793
 794 err_destroy:
 795         free(mi_writer);
 796         return NULL;
 797 }
 798
 799 int mi_lttng_writer_destroy(struct mi_writer *writer)
 800 {
 801         int ret;
 802
 803         if (!writer) {
 804                 ret = -EINVAL;
 805                 goto end;
 806         }
 807
 808         ret = config_writer_destroy(writer->writer);
 809         if (ret < 0) {
 810                 goto end;
 811         }
 812
 813         free(writer);
 814 end:
 815         return ret;
 816 }
 817
 818 int mi_lttng_writer_command_open(struct mi_writer *writer, const char *command)
 819 {
 820         int ret;
 821
 822         /*
 823          * A command is always the MI's root node, it must declare the current
 824          * namespace and schema URIs and the schema's version.
 825          */
 826         ret = config_writer_open_element(writer->writer,
 827                         mi_lttng_element_command);
 828         if (ret) {
 829                 goto end;
 830         }
 831
 832         ret = config_writer_write_attribute(writer->writer,
 833                         mi_lttng_xmlns, DEFAULT_LTTNG_MI_NAMESPACE);
 834         if (ret) {
 835                 goto end;
 836         }
 837
 838         ret = config_writer_write_attribute(writer->writer,
 839                         mi_lttng_xmlns_xsi, mi_lttng_w3_schema_uri);
 840         if (ret) {
 841                 goto end;
 842         }
 843
 844         ret = config_writer_write_attribute(writer->writer,
 845                         mi_lttng_schema_location,
 846                         mi_lttng_schema_location_uri);
 847         if (ret) {
 848                 goto end;
 849         }
 850
 851         ret = config_writer_write_attribute(writer->writer,
 852                         mi_lttng_schema_version,
 853                         mi_lttng_schema_version_value);
 854         if (ret) {
 855                 goto end;
 856         }
 857
 858         ret = mi_lttng_writer_write_element_string(writer,
 859                         mi_lttng_element_command_name, command);
 860 end:
 861         return ret;
 862 }
 863
 864 int mi_lttng_writer_command_close(struct mi_writer *writer)
 865 {
 866         return mi_lttng_writer_close_element(writer);
 867 }
 868
 869 int mi_lttng_writer_open_element(struct mi_writer *writer,
 870                 const char *element_name)
 871 {
 872         return config_writer_open_element(writer->writer, element_name);
 873 }
 874
 875 int mi_lttng_writer_close_element(struct mi_writer *writer)
 876 {
 877         return config_writer_close_element(writer->writer);
 878 }
 879
 880 int mi_lttng_close_multi_element(struct mi_writer *writer,
 881                 unsigned int nb_element)
 882 {
 883         int ret, i;
 884
 885         if (nb_element < 1) {
 886                 ret = 0;
 887                 goto end;
 888         }
 889         for (i = 0; i < nb_element; i++) {
 890                 ret = mi_lttng_writer_close_element(writer);
 891                 if (ret) {
 892                         goto end;
 893                 }
 894         }
 895 end:
 896         return ret;
 897 }
 898
 899 int mi_lttng_writer_write_element_unsigned_int(struct mi_writer *writer,
 900                 const char *element_name, uint64_t value)
 901 {
 902         return config_writer_write_element_unsigned_int(writer->writer,
 903                         element_name, value);
 904 }
 905
 906 int mi_lttng_writer_write_element_signed_int(struct mi_writer *writer,
 907                 const char *element_name, int64_t value)
 908 {
 909         return config_writer_write_element_signed_int(writer->writer,
 910                         element_name, value);
 911 }
 912
 913 int mi_lttng_writer_write_element_bool(struct mi_writer *writer,
 914                 const char *element_name, int value)
 915 {
 916         return config_writer_write_element_bool(writer->writer,
 917                         element_name, value);
 918 }
 919
 920 int mi_lttng_writer_write_element_string(struct mi_writer *writer,
 921                 const char *element_name, const char *value)
 922 {
 923         return config_writer_write_element_string(writer->writer,
 924                         element_name, value);
 925 }
 926
 927 int mi_lttng_writer_write_element_double(struct mi_writer *writer,
 928                 const char *element_name,
 929                 double value)
 930 {
 931         return config_writer_write_element_double(
 932                         writer->writer, element_name, value);
 933 }
 934
 935 int mi_lttng_version(struct mi_writer *writer, struct mi_lttng_version_data *version,
 936         const char *lttng_description, const char *lttng_license)
 937 {
 938         int ret;
 939
 940         /* Open version */
 941         ret = mi_lttng_writer_open_element(writer, mi_lttng_element_version);
 942         if (ret) {
 943                 goto end;
 944         }
 945
 946         /* Version string (contain info like rc etc.) */
 947         ret = mi_lttng_writer_write_element_string(writer,
 948                         mi_lttng_element_version_str, version->version);
 949         if (ret) {
 950                 goto end;
 951         }
 952
 953         /* Major version number */
 954         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 955                         mi_lttng_element_version_major, version->version_major);
 956         if (ret) {
 957                 goto end;
 958         }
 959
 960         /* Minor version number */
 961         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 962                         mi_lttng_element_version_minor, version->version_minor);
 963         if (ret) {
 964                 goto end;
 965         }
 966
 967         /* Commit version number */
 968         ret = mi_lttng_writer_write_element_string(writer,
 969                         mi_lttng_element_version_commit, version->version_commit);
 970         if (ret) {
 971                 goto end;
 972         }
 973
 974         /* Patch number */
 975         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 976                         mi_lttng_element_version_patch_level, version->version_patchlevel);
 977         if (ret) {
 978                 goto end;
 979         }
 980
 981         /* Name of the version */
 982         ret = mi_lttng_writer_write_element_string(writer,
 983                         config_element_name, version->version_name);
 984         if (ret) {
 985                 goto end;
 986         }
 987
 988         /* Description mostly related to beer... */
 989         ret = mi_lttng_writer_write_element_string(writer,
 990                         mi_lttng_element_version_description, lttng_description);
 991         if (ret) {
 992                 goto end;
 993         }
 994
 995         /* url */
 996         ret = mi_lttng_writer_write_element_string(writer,
 997                         mi_lttng_element_version_web, version->package_url);
 998         if (ret) {
 999                 goto end;
1000         }
1001
1002         /* License: free as in free beer...no...*speech* */
1003         ret = mi_lttng_writer_write_element_string(writer,
1004                         mi_lttng_element_version_license, lttng_license);
1005         if (ret) {
1006                 goto end;
1007         }
1008
1009         /* Close version element */
1010         ret = mi_lttng_writer_close_element(writer);
1011
1012 end:
1013         return ret;
1014 }
1015
1016 int mi_lttng_sessions_open(struct mi_writer *writer)
1017 {
1018         return mi_lttng_writer_open_element(writer, config_element_sessions);
1019 }
1020
1021 int mi_lttng_session(struct mi_writer *writer,
1022                 struct lttng_session *session, int is_open)
1023 {
1024         int ret;
1025
1026         LTTNG_ASSERT(session);
1027
1028         /* Open sessions element */
1029         ret = mi_lttng_writer_open_element(writer,
1030                         config_element_session);
1031         if (ret) {
1032                 goto end;
1033         }
1034
1035         /* Name of the session */
1036         ret = mi_lttng_writer_write_element_string(writer,
1037                         config_element_name, session->name);
1038         if (ret) {
1039                 goto end;
1040         }
1041
1042         /* Path */
1043         ret = mi_lttng_writer_write_element_string(writer,
1044                         config_element_path, session->path);
1045         if (ret) {
1046                 goto end;
1047         }
1048
1049         /* Enabled ? */
1050         ret = mi_lttng_writer_write_element_bool(writer,
1051                         config_element_enabled, session->enabled);
1052         if (ret) {
1053                 goto end;
1054         }
1055
1056         /* Snapshot mode */
1057         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1058                         config_element_snapshot_mode, session->snapshot_mode);
1059         if (ret) {
1060                 goto end;
1061         }
1062
1063         /* Live timer interval in usec */
1064         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1065                         config_element_live_timer_interval,
1066                         session->live_timer_interval);
1067         if (ret) {
1068                 goto end;
1069         }
1070
1071         if (!is_open) {
1072                 /* Closing session element */
1073                 ret = mi_lttng_writer_close_element(writer);
1074         }
1075 end:
1076         return ret;
1077
1078 }
1079
1080 int mi_lttng_domains_open(struct mi_writer *writer)
1081 {
1082         return mi_lttng_writer_open_element(writer, config_element_domains);
1083 }
1084
1085 int mi_lttng_domain(struct mi_writer *writer,
1086                 struct lttng_domain *domain, int is_open)
1087 {
1088         int ret = 0;
1089         const char *str_domain;
1090         const char *str_buffer;
1091
1092         LTTNG_ASSERT(domain);
1093
1094         /* Open domain element */
1095         ret = mi_lttng_writer_open_element(writer, config_element_domain);
1096         if (ret) {
1097                 goto end;
1098         }
1099
1100         /* Domain Type */
1101         str_domain = mi_lttng_domaintype_string(domain->type);
1102         ret = mi_lttng_writer_write_element_string(writer, config_element_type,
1103                         str_domain);
1104         if (ret) {
1105                 goto end;
1106         }
1107
1108         /* Buffer Type */
1109         str_buffer= mi_lttng_buffertype_string(domain->buf_type);
1110         ret = mi_lttng_writer_write_element_string(writer,
1111                         config_element_buffer_type, str_buffer);
1112         if (ret) {
1113                 goto end;
1114         }
1115
1116         /* TODO: union  attr
1117          * This union is not currently used and was added for
1118          * future ust domain support.
1119          * Date: 25-06-2014
1120          * */
1121
1122         if (!is_open) {
1123                 /* Closing domain element */
1124                 ret = mi_lttng_writer_close_element(writer);
1125         }
1126
1127 end:
1128         return ret;
1129
1130 }
1131
1132 int mi_lttng_channels_open(struct mi_writer *writer)
1133 {
1134         return mi_lttng_writer_open_element(writer, config_element_channels);
1135 }
1136
1137 int mi_lttng_channel(struct mi_writer *writer,
1138                 struct lttng_channel *channel, int is_open)
1139 {
1140         int ret = 0;
1141
1142         LTTNG_ASSERT(channel);
1143
1144         /* Opening channel element */
1145         ret = mi_lttng_writer_open_element(writer, config_element_channel);
1146         if (ret) {
1147                 goto end;
1148         }
1149
1150         /* Name */
1151         ret = mi_lttng_writer_write_element_string(writer, config_element_name,
1152                         channel->name);
1153         if (ret) {
1154                 goto end;
1155         }
1156
1157         /* Enabled ? */
1158         ret = mi_lttng_writer_write_element_bool(writer,
1159                         config_element_enabled, channel->enabled);
1160         if (ret) {
1161                 goto end;
1162         }
1163
1164         /* Attribute */
1165         ret = mi_lttng_channel_attr(writer, &channel->attr);
1166         if (ret) {
1167                 goto end;
1168         }
1169
1170         if (!is_open) {
1171                 /* Closing channel element */
1172                 ret = mi_lttng_writer_close_element(writer);
1173                 if (ret) {
1174                         goto end;
1175                 }
1176         }
1177 end:
1178         return ret;
1179 }
1180
1181 int mi_lttng_channel_attr(struct mi_writer *writer,
1182                 struct lttng_channel_attr *attr)
1183 {
1184         int ret = 0;
1185         struct lttng_channel *chan = caa_container_of(attr,
1186                         struct lttng_channel, attr);
1187         uint64_t discarded_events, lost_packets, monitor_timer_interval;
1188         int64_t blocking_timeout;
1189
1190         LTTNG_ASSERT(attr);
1191
1192         ret = lttng_channel_get_discarded_event_count(chan, &discarded_events);
1193         if (ret) {
1194                 goto end;
1195         }
1196
1197         ret = lttng_channel_get_lost_packet_count(chan, &lost_packets);
1198         if (ret) {
1199                 goto end;
1200         }
1201
1202         ret = lttng_channel_get_monitor_timer_interval(chan,
1203                         &monitor_timer_interval);
1204         if (ret) {
1205                 goto end;
1206         }
1207
1208         ret = lttng_channel_get_blocking_timeout(chan,
1209                         &blocking_timeout);
1210         if (ret) {
1211                 goto end;
1212         }
1213
1214         /* Opening Attributes */
1215         ret = mi_lttng_writer_open_element(writer, config_element_attributes);
1216         if (ret) {
1217                 goto end;
1218         }
1219
1220         /* Overwrite */
1221         ret = mi_lttng_writer_write_element_string(writer,
1222                 config_element_overwrite_mode,
1223                 attr->overwrite ? config_overwrite_mode_overwrite :
1224                         config_overwrite_mode_discard);
1225         if (ret) {
1226                 goto end;
1227         }
1228
1229         /* Sub buffer size in byte */
1230         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1231                 config_element_subbuf_size, attr->subbuf_size);
1232         if (ret) {
1233                 goto end;
1234         }
1235
1236         /* Number of subbuffer (power of two) */
1237         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1238                 config_element_num_subbuf,
1239                 attr->num_subbuf);
1240         if (ret) {
1241                 goto end;
1242         }
1243
1244         /* Switch timer interval in usec */
1245         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1246                 config_element_switch_timer_interval,
1247                 attr->switch_timer_interval);
1248         if (ret) {
1249                 goto end;
1250         }
1251
1252         /* Read timer interval in usec */
1253         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1254                 config_element_read_timer_interval,
1255                 attr->read_timer_interval);
1256         if (ret) {
1257                 goto end;
1258         }
1259
1260         /* Monitor timer interval in usec */
1261         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1262                 config_element_monitor_timer_interval,
1263                 monitor_timer_interval);
1264         if (ret) {
1265                 goto end;
1266         }
1267
1268         /* Retry timeout in usec */
1269         ret = mi_lttng_writer_write_element_signed_int(writer,
1270                 config_element_blocking_timeout,
1271                 blocking_timeout);
1272         if (ret) {
1273                 goto end;
1274         }
1275
1276         /* Event output */
1277         ret = mi_lttng_writer_write_element_string(writer,
1278                 config_element_output_type,
1279                 attr->output == LTTNG_EVENT_SPLICE ?
1280                 config_output_type_splice : config_output_type_mmap);
1281         if (ret) {
1282                 goto end;
1283         }
1284
1285         /* Tracefile size in bytes */
1286         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1287                 config_element_tracefile_size, attr->tracefile_size);
1288         if (ret) {
1289                 goto end;
1290         }
1291
1292         /* Count of tracefiles */
1293         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1294                 config_element_tracefile_count,
1295                 attr->tracefile_count);
1296         if (ret) {
1297                 goto end;
1298         }
1299
1300         /* Live timer interval in usec*/
1301         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1302                 config_element_live_timer_interval,
1303                 attr->live_timer_interval);
1304         if (ret) {
1305                 goto end;
1306         }
1307
1308         /* Discarded events */
1309         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1310                 config_element_discarded_events,
1311                 discarded_events);
1312         if (ret) {
1313                 goto end;
1314         }
1315
1316         /* Lost packets */
1317         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1318                 config_element_lost_packets,
1319                 lost_packets);
1320         if (ret) {
1321                 goto end;
1322         }
1323
1324         /* Closing attributes */
1325         ret = mi_lttng_writer_close_element(writer);
1326         if (ret) {
1327                 goto end;
1328         }
1329 end:
1330         return ret;
1331
1332 }
1333
1334 int mi_lttng_event_common_attributes(struct mi_writer *writer,
1335                 struct lttng_event *event)
1336 {
1337         int ret;
1338         const char *filter_expression;
1339
1340         /* Open event element */
1341         ret = mi_lttng_writer_open_element(writer, config_element_event);
1342         if (ret) {
1343                 goto end;
1344         }
1345
1346         /* Event name */
1347         ret = mi_lttng_writer_write_element_string(writer,
1348                         config_element_name, event->name);
1349         if (ret) {
1350                 goto end;
1351         }
1352
1353         /* Event type */
1354         ret = mi_lttng_writer_write_element_string(writer,
1355                         config_element_type, mi_lttng_eventtype_string(event->type));
1356         if (ret) {
1357                 goto end;
1358         }
1359
1360         /* Is event enabled */
1361         ret = mi_lttng_writer_write_element_bool(writer,
1362                         config_element_enabled, event->enabled);
1363         if (ret) {
1364                 goto end;
1365         }
1366
1367         /* Event filter expression */
1368         ret = lttng_event_get_filter_expression(event, &filter_expression);
1369         if (ret) {
1370                 goto end;
1371         }
1372
1373         if (filter_expression) {
1374                 ret = mi_lttng_writer_write_element_string(writer,
1375                                 config_element_filter_expression,
1376                                 filter_expression);
1377                 if (ret) {
1378                         goto end;
1379                 }
1380         }
1381
1382 end:
1383         return ret;
1384 }
1385
1386 static int write_event_exclusions(struct mi_writer *writer,
1387                 struct lttng_event *event)
1388 {
1389         int i;
1390         int ret;
1391         int exclusion_count;
1392
1393         /* Open event exclusions */
1394         ret = mi_lttng_writer_open_element(writer, config_element_exclusions);
1395         if (ret) {
1396                 goto end;
1397         }
1398
1399         exclusion_count = lttng_event_get_exclusion_name_count(event);
1400         if (exclusion_count < 0) {
1401                 ret = exclusion_count;
1402                 goto end;
1403         }
1404
1405         for (i = 0; i < exclusion_count; i++) {
1406                 const char *name;
1407
1408                 ret = lttng_event_get_exclusion_name(event, i, &name);
1409                 if (ret) {
1410                         /* Close exclusions */
1411                         mi_lttng_writer_close_element(writer);
1412                         goto end;
1413                 }
1414
1415                 ret = mi_lttng_writer_write_element_string(writer,
1416                                 config_element_exclusion, name);
1417                 if (ret) {
1418                         /* Close exclusions */
1419                         mi_lttng_writer_close_element(writer);
1420                         goto end;
1421                 }
1422         }
1423
1424         /* Close exclusions */
1425         ret = mi_lttng_writer_close_element(writer);
1426
1427 end:
1428         return ret;
1429 }
1430
1431 int mi_lttng_event_tracepoint_loglevel(struct mi_writer *writer,
1432                 struct lttng_event *event, enum lttng_domain_type domain)
1433 {
1434         int ret;
1435
1436         /* Event loglevel */
1437         ret = mi_lttng_writer_write_element_string(writer,
1438                         config_element_loglevel,
1439                         mi_lttng_loglevel_string(event->loglevel, domain));
1440         if (ret) {
1441                 goto end;
1442         }
1443
1444         /* Log level type */
1445         ret = mi_lttng_writer_write_element_string(writer,
1446                         config_element_loglevel_type,
1447                         mi_lttng_logleveltype_string(event->loglevel_type));
1448         if (ret) {
1449                 goto end;
1450         }
1451
1452         /* Event exclusions */
1453         ret = write_event_exclusions(writer, event);
1454
1455 end:
1456         return ret;
1457 }
1458
1459 int mi_lttng_event_tracepoint_no_loglevel(struct mi_writer *writer,
1460                 struct lttng_event *event)
1461 {
1462         /* event exclusion filter */
1463         return write_event_exclusions(writer, event);
1464 }
1465
1466 int mi_lttng_event_function_probe(struct mi_writer *writer,
1467                 struct lttng_event *event)
1468 {
1469         int ret;
1470
1471         ret = mi_lttng_writer_open_element(writer, config_element_attributes);
1472         if (ret) {
1473                 goto end;
1474         }
1475
1476         ret = mi_lttng_writer_open_element(writer, config_element_probe_attributes);
1477         if (ret) {
1478                 goto end;
1479         }
1480
1481         if (event->attr.probe.addr != 0) {
1482                 /* event probe address */
1483                 ret = mi_lttng_writer_write_element_unsigned_int(writer,
1484                                 config_element_address, event->attr.probe.addr);
1485                 if (ret) {
1486                         goto end;
1487                 }
1488         } else {
1489                 /* event probe offset */
1490                 ret = mi_lttng_writer_write_element_unsigned_int(writer,
1491                                 config_element_offset, event->attr.probe.offset);
1492                 if (ret) {
1493                         goto end;
1494                 }
1495
1496                 /* event probe symbol_name */
1497                 ret = mi_lttng_writer_write_element_string(writer,
1498                                 config_element_symbol_name, event->attr.probe.symbol_name);
1499                 if (ret) {
1500                         goto end;
1501                 }
1502         }
1503
1504         /* Close probe_attributes and attributes */
1505         ret = mi_lttng_close_multi_element(writer, 2);
1506 end:
1507         return ret;
1508 }
1509
1510 static
1511 int mi_lttng_event_userspace_probe(struct mi_writer *writer,
1512                 struct lttng_event *event)
1513 {
1514         int ret;
1515         const struct lttng_userspace_probe_location *location;
1516         const struct lttng_userspace_probe_location_lookup_method *lookup_method;
1517         enum lttng_userspace_probe_location_lookup_method_type lookup_type;
1518
1519         location = lttng_event_get_userspace_probe_location(event);
1520         if (!location) {
1521                 ret = -LTTNG_ERR_INVALID;
1522                 goto end;
1523         }
1524
1525         lookup_method = lttng_userspace_probe_location_get_lookup_method(location);
1526         if (!lookup_method) {
1527                 ret = -LTTNG_ERR_INVALID;
1528                 goto end;
1529         }
1530
1531         lookup_type = lttng_userspace_probe_location_lookup_method_get_type(lookup_method);
1532
1533         ret = mi_lttng_writer_open_element(writer, config_element_attributes);
1534         if (ret) {
1535                 goto end;
1536         }
1537
1538         switch (lttng_userspace_probe_location_get_type(location)) {
1539         case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION:
1540         {
1541                 const char *function_name;
1542                 const char *binary_path;
1543
1544                 ret = mi_lttng_writer_open_element(writer,
1545                                 config_element_userspace_probe_function_attributes);
1546                 if (ret) {
1547                         goto end;
1548                 }
1549
1550                 switch (lookup_type) {
1551                 case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF:
1552                         ret = mi_lttng_writer_write_element_string(writer,
1553                                         config_element_userspace_probe_lookup,
1554                                         config_element_userspace_probe_lookup_function_elf);
1555                         if (ret) {
1556                                 goto end;
1557                         }
1558                         break;
1559                 case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_DEFAULT:
1560                         ret = mi_lttng_writer_write_element_string(writer,
1561                                         config_element_userspace_probe_lookup,
1562                                         config_element_userspace_probe_lookup_function_default);
1563                         if (ret) {
1564                                 goto end;
1565                         }
1566                         break;
1567                 default:
1568                         goto end;
1569                 }
1570
1571                 binary_path = lttng_userspace_probe_location_function_get_binary_path(location);
1572                 ret = mi_lttng_writer_write_element_string(writer,
1573                                 config_element_userspace_probe_location_binary_path, binary_path);
1574                 if (ret) {
1575                         goto end;
1576                 }
1577
1578                 function_name = lttng_userspace_probe_location_function_get_function_name(location);
1579                 ret = mi_lttng_writer_write_element_string(writer,
1580                                 config_element_userspace_probe_function_location_function_name,
1581                                 function_name);
1582                 if (ret) {
1583                         goto end;
1584                 }
1585
1586                 break;
1587         }
1588         case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT:
1589         {
1590                 const char *probe_name, *provider_name;
1591                 const char *binary_path;
1592
1593                 ret = mi_lttng_writer_open_element(writer,
1594                                 config_element_userspace_probe_function_attributes);
1595                 if (ret) {
1596                         goto end;
1597                 }
1598
1599                 switch (lookup_type) {
1600                 case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT:
1601                         ret = mi_lttng_writer_write_element_string(writer,
1602                                         config_element_userspace_probe_lookup,
1603                                         config_element_userspace_probe_lookup_tracepoint_sdt);
1604                         if (ret) {
1605                                 goto end;
1606                         }
1607                         break;
1608                 default:
1609                         goto end;
1610                 }
1611
1612                 binary_path = lttng_userspace_probe_location_tracepoint_get_binary_path(location);
1613                 ret = mi_lttng_writer_write_element_string(writer,
1614                                 config_element_userspace_probe_location_binary_path,
1615                                 binary_path);
1616                 if (ret) {
1617                         goto end;
1618                 }
1619
1620                 provider_name = lttng_userspace_probe_location_tracepoint_get_provider_name(location);
1621                 ret = mi_lttng_writer_write_element_string(writer,
1622                                 config_element_userspace_probe_tracepoint_location_provider_name,
1623                                 provider_name);
1624                 if (ret) {
1625                         goto end;
1626                 }
1627
1628                 probe_name = lttng_userspace_probe_location_tracepoint_get_probe_name(location);
1629                 ret = mi_lttng_writer_write_element_string(writer,
1630                                 config_element_userspace_probe_tracepoint_location_probe_name, probe_name);
1631                 if (ret) {
1632                         goto end;
1633                 }
1634                 break;
1635         }
1636         default:
1637                 ERR("Invalid probe type encountered");
1638         }
1639         /* Close probe_attributes and attributes */
1640         ret = mi_lttng_close_multi_element(writer, 2);
1641 end:
1642         return ret;
1643 }
1644
1645 int mi_lttng_event_function_entry(struct mi_writer *writer,
1646                 struct lttng_event *event)
1647 {
1648         int ret;
1649
1650         ret = mi_lttng_writer_open_element(writer, config_element_attributes);
1651         if (ret) {
1652                 goto end;
1653         }
1654
1655         ret = mi_lttng_writer_open_element(writer, config_element_probe_attributes);
1656         if (ret) {
1657                 goto end;
1658         }
1659
1660         /* event probe symbol_name */
1661         ret = mi_lttng_writer_write_element_string(writer,
1662                         config_element_symbol_name, event->attr.ftrace.symbol_name);
1663         if (ret) {
1664                 goto end;
1665         }
1666
1667         /* Close function_attributes and attributes */
1668         ret = mi_lttng_close_multi_element(writer, 2);
1669 end:
1670         return ret;
1671 }
1672
1673 int mi_lttng_events_open(struct mi_writer *writer)
1674 {
1675         return mi_lttng_writer_open_element(writer, config_element_events);
1676 }
1677
1678 int mi_lttng_event(struct mi_writer *writer,
1679                 struct lttng_event *event, int is_open, enum lttng_domain_type domain)
1680 {
1681         int ret;
1682
1683         ret = mi_lttng_event_common_attributes(writer, event);
1684         if (ret) {
1685                 goto end;
1686         }
1687
1688         switch (event->type) {
1689         case LTTNG_EVENT_TRACEPOINT:
1690         {
1691                 if (event->loglevel != -1) {
1692                         ret = mi_lttng_event_tracepoint_loglevel(writer, event, domain);
1693                 } else {
1694                         ret = mi_lttng_event_tracepoint_no_loglevel(writer, event);
1695                 }
1696                 break;
1697         }
1698         case LTTNG_EVENT_FUNCTION:
1699                 /* Fallthrough */
1700         case LTTNG_EVENT_PROBE:
1701                 ret = mi_lttng_event_function_probe(writer, event);
1702                 break;
1703         case LTTNG_EVENT_FUNCTION_ENTRY:
1704                 ret = mi_lttng_event_function_entry(writer, event);
1705                 break;
1706         case LTTNG_EVENT_USERSPACE_PROBE:
1707                 ret = mi_lttng_event_userspace_probe(writer, event);
1708                 break;
1709         case LTTNG_EVENT_ALL:
1710                 /* Fallthrough */
1711         default:
1712                 break;
1713         }
1714
1715         if (ret) {
1716                 goto end;
1717         }
1718
1719         if (!is_open) {
1720                 ret = mi_lttng_writer_close_element(writer);
1721         }
1722
1723 end:
1724         return ret;
1725 }
1726
1727 int mi_lttng_trackers_open(struct mi_writer *writer)
1728 {
1729         return mi_lttng_writer_open_element(
1730                         writer, config_element_process_attr_trackers);
1731 }
1732
1733 static int get_tracker_elements(enum lttng_process_attr process_attr,
1734                 const char **element_process_attr_tracker,
1735                 const char **element_process_attr_value)
1736 {
1737         int ret = 0;
1738
1739         switch (process_attr) {
1740         case LTTNG_PROCESS_ATTR_PROCESS_ID:
1741                 *element_process_attr_tracker =
1742                                 config_element_process_attr_tracker_pid;
1743                 *element_process_attr_value =
1744                                 config_element_process_attr_pid_value;
1745                 break;
1746         case LTTNG_PROCESS_ATTR_VIRTUAL_PROCESS_ID:
1747                 *element_process_attr_tracker =
1748                                 config_element_process_attr_tracker_vpid;
1749                 *element_process_attr_value =
1750                                 config_element_process_attr_vpid_value;
1751                 break;
1752         case LTTNG_PROCESS_ATTR_USER_ID:
1753                 *element_process_attr_tracker =
1754                                 config_element_process_attr_tracker_uid;
1755                 *element_process_attr_value =
1756                                 config_element_process_attr_uid_value;
1757                 break;
1758         case LTTNG_PROCESS_ATTR_VIRTUAL_USER_ID:
1759                 *element_process_attr_tracker =
1760                                 config_element_process_attr_tracker_vuid;
1761                 *element_process_attr_value =
1762                                 config_element_process_attr_vuid_value;
1763                 break;
1764         case LTTNG_PROCESS_ATTR_GROUP_ID:
1765                 *element_process_attr_tracker =
1766                                 config_element_process_attr_tracker_gid;
1767                 *element_process_attr_value =
1768                                 config_element_process_attr_gid_value;
1769                 break;
1770         case LTTNG_PROCESS_ATTR_VIRTUAL_GROUP_ID:
1771                 *element_process_attr_tracker =
1772                                 config_element_process_attr_tracker_vgid;
1773                 *element_process_attr_value =
1774                                 config_element_process_attr_vgid_value;
1775                 break;
1776         default:
1777                 ret = LTTNG_ERR_SAVE_IO_FAIL;
1778         }
1779         return ret;
1780 }
1781
1782 int mi_lttng_process_attribute_tracker_open(
1783                 struct mi_writer *writer, enum lttng_process_attr process_attr)
1784 {
1785         int ret;
1786         const char *element_tracker, *element_value;
1787
1788         ret = get_tracker_elements(
1789                         process_attr, &element_tracker, &element_value);
1790         if (ret) {
1791                 return ret;
1792         }
1793
1794         /* Open process attribute tracker element */
1795         ret = mi_lttng_writer_open_element(writer, element_tracker);
1796         if (ret) {
1797                 goto end;
1798         }
1799
1800         /* Open values element */
1801         ret = mi_lttng_process_attr_values_open(writer);
1802 end:
1803         return ret;
1804 }
1805
1806 int mi_lttng_pids_open(struct mi_writer *writer)
1807 {
1808         return mi_lttng_writer_open_element(writer, config_element_pids);
1809 }
1810
1811 /*
1812  * TODO: move the listing of pid for user agent to process semantic on
1813  * mi api bump. The use of process element break the mi api.
1814  */
1815 int mi_lttng_pid(struct mi_writer *writer,
1816                 pid_t pid,
1817                 const char *name,
1818                 int is_open)
1819 {
1820         int ret;
1821
1822         /* Open pid process */
1823         ret = mi_lttng_writer_open_element(writer, config_element_pid);
1824         if (ret) {
1825                 goto end;
1826         }
1827
1828         /* Writing pid number */
1829         ret = mi_lttng_writer_write_element_signed_int(writer,
1830                         mi_lttng_element_pid_id, (int)pid);
1831         if (ret) {
1832                 goto end;
1833         }
1834
1835         /* Writing name of the process */
1836         if (name) {
1837                 ret = mi_lttng_writer_write_element_string(writer, config_element_name,
1838                                 name);
1839                 if (ret) {
1840                         goto end;
1841                 }
1842         }
1843
1844         if (!is_open) {
1845                 /* Closing Pid */
1846                 ret = mi_lttng_writer_close_element(writer);
1847         }
1848
1849 end:
1850         return ret;
1851 }
1852
1853 int mi_lttng_process_attr_values_open(struct mi_writer *writer)
1854 {
1855         return mi_lttng_writer_open_element(
1856                         writer, config_element_process_attr_values);
1857 }
1858
1859 int mi_lttng_all_process_attribute_value(struct mi_writer *writer,
1860                 enum lttng_process_attr process_attr,
1861                 bool is_open)
1862 {
1863         int ret;
1864         const char *element_id_tracker, *element_target_id;
1865
1866         ret = get_tracker_elements(
1867                         process_attr, &element_id_tracker, &element_target_id);
1868         if (ret) {
1869                 return ret;
1870         }
1871
1872         ret = mi_lttng_writer_open_element(writer, element_target_id);
1873         if (ret) {
1874                 goto end;
1875         }
1876
1877         ret = mi_lttng_writer_open_element(writer, config_element_type);
1878         if (ret) {
1879                 goto end;
1880         }
1881
1882         ret = mi_lttng_writer_write_element_bool(writer, config_element_all, 1);
1883         if (ret) {
1884                 goto end;
1885         }
1886
1887         ret = mi_lttng_writer_close_element(writer);
1888         if (ret) {
1889                 goto end;
1890         }
1891
1892         if (!is_open) {
1893                 ret = mi_lttng_writer_close_element(writer);
1894                 if (ret) {
1895                         goto end;
1896                 }
1897         }
1898 end:
1899         return ret;
1900 }
1901
1902 int mi_lttng_integral_process_attribute_value(struct mi_writer *writer,
1903                 enum lttng_process_attr process_attr,
1904                 int64_t value,
1905                 bool is_open)
1906 {
1907         int ret;
1908         const char *element_id_tracker, *element_target_id;
1909
1910         ret = get_tracker_elements(
1911                         process_attr, &element_id_tracker, &element_target_id);
1912         if (ret) {
1913                 return ret;
1914         }
1915
1916         ret = mi_lttng_writer_open_element(writer, element_target_id);
1917         if (ret) {
1918                 goto end;
1919         }
1920
1921         ret = mi_lttng_writer_open_element(writer, config_element_type);
1922         if (ret) {
1923                 goto end;
1924         }
1925
1926         ret = mi_lttng_writer_write_element_signed_int(
1927                         writer, config_element_process_attr_id, value);
1928         if (ret) {
1929                 goto end;
1930         }
1931
1932         ret = mi_lttng_writer_close_element(writer);
1933         if (ret) {
1934                 goto end;
1935         }
1936
1937         if (!is_open) {
1938                 ret = mi_lttng_writer_close_element(writer);
1939                 if (ret) {
1940                         goto end;
1941                 }
1942         }
1943
1944 end:
1945         return ret;
1946 }
1947
1948 int mi_lttng_string_process_attribute_value(struct mi_writer *writer,
1949                 enum lttng_process_attr process_attr,
1950                 const char *value,
1951                 bool is_open)
1952
1953 {
1954         int ret;
1955         const char *element_id_tracker, *element_target_id;
1956
1957         ret = get_tracker_elements(
1958                         process_attr, &element_id_tracker, &element_target_id);
1959         if (ret) {
1960                 return ret;
1961         }
1962
1963         ret = mi_lttng_writer_open_element(writer, element_target_id);
1964         if (ret) {
1965                 goto end;
1966         }
1967
1968         ret = mi_lttng_writer_open_element(writer, config_element_type);
1969         if (ret) {
1970                 goto end;
1971         }
1972
1973         ret = mi_lttng_writer_write_element_string(
1974                         writer, config_element_name, value);
1975         if (ret) {
1976                 goto end;
1977         }
1978
1979         ret = mi_lttng_writer_close_element(writer);
1980         if (ret) {
1981                 goto end;
1982         }
1983
1984         if (!is_open) {
1985                 ret = mi_lttng_writer_close_element(writer);
1986                 if (ret) {
1987                         goto end;
1988                 }
1989         }
1990
1991 end:
1992         return ret;
1993 }
1994
1995 int mi_lttng_event_fields_open(struct mi_writer *writer)
1996 {
1997         return mi_lttng_writer_open_element(writer, mi_lttng_element_event_fields);
1998 }
1999
2000 int mi_lttng_event_field(struct mi_writer *writer,
2001                 struct lttng_event_field *field)
2002 {
2003         int ret;
2004
2005         if (!field->field_name[0]) {
2006                 ret = 0;
2007                 goto end;
2008         }
2009
2010         /* Open field */
2011         ret = mi_lttng_writer_open_element(writer, mi_lttng_element_event_field);
2012         if (ret) {
2013                 goto end;
2014         }
2015
2016         if (!field->field_name[0]) {
2017                 goto close;
2018         }
2019
2020         /* Name */
2021         ret = mi_lttng_writer_write_element_string(writer, config_element_name,
2022                         field->field_name);
2023         if (ret) {
2024                 goto end;
2025         }
2026
2027         /* Type */
2028         ret = mi_lttng_writer_write_element_string(writer, config_element_type,
2029                         mi_lttng_eventfieldtype_string(field->type));
2030         if (ret) {
2031                 goto end;
2032         }
2033
2034         /* nowrite  */
2035         ret = mi_lttng_writer_write_element_signed_int(writer,
2036                         mi_lttng_element_nowrite, field->nowrite);
2037         if (ret) {
2038                 goto end;
2039         }
2040
2041 close:
2042         /* Close field element */
2043         ret = mi_lttng_writer_close_element(writer);
2044
2045 end:
2046         return ret;
2047 }
2048
2049 int mi_lttng_perf_counter_context(struct mi_writer *writer,
2050                 struct lttng_event_perf_counter_ctx  *perf_context)
2051 {
2052         int ret;
2053
2054         /* Open perf_counter_context */
2055         ret = mi_lttng_writer_open_element(writer,
2056                         mi_lttng_element_perf_counter_context);
2057         if (ret) {
2058                 goto end;
2059         }
2060
2061         /* Type */
2062         ret = mi_lttng_writer_write_element_unsigned_int(writer,
2063                         config_element_type, perf_context->type);
2064         if (ret) {
2065                 goto end;
2066         }
2067
2068         /* Config */
2069         ret = mi_lttng_writer_write_element_unsigned_int(writer,
2070                         config_element_config, perf_context->config);
2071         if (ret) {
2072                 goto end;
2073         }
2074
2075         /* Name of the perf counter */
2076         ret = mi_lttng_writer_write_element_string(writer,
2077                         config_element_name, perf_context->name);
2078         if (ret) {
2079                 goto end;
2080         }
2081
2082         /* Close perf_counter_context */
2083         ret = mi_lttng_writer_close_element(writer);
2084 end:
2085         return ret;
2086 }
2087
2088 static
2089 int mi_lttng_app_context(struct mi_writer *writer,
2090                 const char *provider_name, const char *ctx_name)
2091 {
2092         int ret;
2093
2094         /* Open app */
2095         ret = mi_lttng_writer_open_element(writer,
2096                         config_element_context_app);
2097         if (ret) {
2098                 goto end;
2099         }
2100
2101         /* provider_name */
2102         ret = mi_lttng_writer_write_element_string(writer,
2103                         config_element_context_app_provider_name,
2104                         provider_name);
2105         if (ret) {
2106                 goto end;
2107         }
2108
2109         /* ctx_name */
2110         ret = mi_lttng_writer_write_element_string(writer,
2111                         config_element_context_app_ctx_name, ctx_name);
2112         if (ret) {
2113                 goto end;
2114         }
2115
2116         /* Close app */
2117         ret = mi_lttng_writer_close_element(writer);
2118 end:
2119         return ret;
2120 }
2121
2122 int mi_lttng_context(struct mi_writer *writer,
2123                 struct lttng_event_context *context, int is_open)
2124 {
2125         int ret;
2126
2127         /* Open context */
2128         ret = mi_lttng_writer_open_element(writer , config_element_context);
2129         if (ret) {
2130                 goto end;
2131         }
2132
2133         /* Special case for PERF_*_COUNTER
2134          * print the lttng_event_perf_counter_ctx*/
2135         switch (context->ctx) {
2136         case LTTNG_EVENT_CONTEXT_PERF_COUNTER:
2137         case LTTNG_EVENT_CONTEXT_PERF_THREAD_COUNTER:
2138         case LTTNG_EVENT_CONTEXT_PERF_CPU_COUNTER:
2139         {
2140                 struct lttng_event_perf_counter_ctx *perf_context =
2141                                 &context->u.perf_counter;
2142                 ret =  mi_lttng_perf_counter_context(writer, perf_context);
2143                 if (ret) {
2144                         goto end;
2145                 }
2146                 break;
2147         }
2148         case LTTNG_EVENT_CONTEXT_APP_CONTEXT:
2149         {
2150                 ret = mi_lttng_app_context(writer,
2151                                 context->u.app_ctx.provider_name,
2152                                 context->u.app_ctx.ctx_name);
2153                 if (ret) {
2154                         goto end;
2155                 }
2156                 break;
2157         }
2158         default:
2159         {
2160                 const char *type_string = mi_lttng_event_contexttype_string(
2161                                 context->ctx);
2162                 if (!type_string) {
2163                         ret = -LTTNG_ERR_INVALID;
2164                         goto end;
2165                 }
2166
2167                 /* Print context type */
2168                 ret = mi_lttng_writer_write_element_string(writer,
2169                                 config_element_type, type_string);
2170                 break;
2171         }
2172         }
2173
2174         /* Close context */
2175         if (!is_open) {
2176                 ret = mi_lttng_writer_close_element(writer);
2177         }
2178
2179 end:
2180         return ret;
2181 }
2182
2183 int mi_lttng_snapshot_output_session_name(struct mi_writer *writer,
2184                 const char *session_name)
2185 {
2186         int ret;
2187
2188         /* Open session element */
2189         ret = mi_lttng_writer_open_element(writer, config_element_session);
2190         if (ret) {
2191                 goto end;
2192         }
2193
2194         /* Snapshot output list for current session name */
2195         ret = mi_lttng_writer_write_element_string(writer, config_element_name,
2196                         session_name);
2197         if (ret) {
2198                 goto end;
2199         }
2200
2201         /* Open element snapshots (sequence one snapshot) */
2202         ret = mi_lttng_writer_open_element(writer, mi_lttng_element_snapshots);
2203         if (ret) {
2204                 goto end;
2205         }
2206
2207 end:
2208         return ret;
2209 }
2210
2211 int mi_lttng_snapshot_list_output(struct mi_writer *writer,
2212                 const struct lttng_snapshot_output *output)
2213 {
2214         int ret;
2215
2216         /* Open element snapshot output */
2217         ret = mi_lttng_writer_open_element(writer,
2218                         mi_lttng_element_command_snapshot);
2219         if (ret) {
2220                 goto end;
2221         }
2222
2223         /* ID of the snapshot output */
2224         ret = mi_lttng_writer_write_element_unsigned_int(writer,
2225                         mi_lttng_element_id, output->id);
2226         if (ret) {
2227                 goto end;
2228         }
2229
2230         /* Name of the output */
2231         ret = mi_lttng_writer_write_element_string(writer, config_element_name,
2232                         output->name);
2233         if (ret) {
2234                 goto end;
2235         }
2236
2237         /* Destination of the output (ctrl_url)*/
2238         ret = mi_lttng_writer_write_element_string(writer,
2239                         mi_lttng_element_snapshot_ctrl_url, output->ctrl_url);
2240         if (ret) {
2241                 goto end;
2242         }
2243
2244         /* Destination of the output (data_url) */
2245         ret = mi_lttng_writer_write_element_string(writer,
2246                         mi_lttng_element_snapshot_data_url, output->data_url);
2247         if (ret) {
2248                 goto end;
2249         }
2250
2251         /* total size of all stream combined */
2252         ret = mi_lttng_writer_write_element_unsigned_int(writer,
2253                         mi_lttng_element_snapshot_max_size, output->max_size);
2254         if (ret) {
2255                 goto end;
2256         }
2257
2258         /* Close snapshot output element */
2259         ret = mi_lttng_writer_close_element(writer);
2260
2261 end:
2262         return ret;
2263 }
2264
2265 int mi_lttng_snapshot_del_output(struct mi_writer *writer, int id,
2266                 const char *name, const char *current_session_name)
2267 {
2268         int ret;
2269
2270         /* Open element del_snapshot */
2271         ret = mi_lttng_writer_open_element(writer,
2272                         mi_lttng_element_command_snapshot);
2273         if (ret) {
2274                 goto end;
2275         }
2276
2277
2278         if (id != UINT32_MAX) {
2279                 /* "Snapshot output "id" successfully deleted
2280                  * for "current_session_name"
2281                  * ID of the snapshot output
2282                  */
2283                 ret = mi_lttng_writer_write_element_unsigned_int(writer,
2284                                 mi_lttng_element_id, id);
2285                 if (ret) {
2286                         goto end;
2287                 }
2288         } else {
2289                 /* "Snapshot output "name" successfully deleted
2290                  * for session "current_session_name"
2291                  * Name of the output
2292                  */
2293                 ret = mi_lttng_writer_write_element_string(writer, config_element_name,
2294                                 name);
2295                 if (ret) {
2296                         goto end;
2297                 }
2298         }
2299
2300         /* Snapshot was deleted for session "current_session_name"*/
2301         ret = mi_lttng_writer_write_element_string(writer,
2302                         mi_lttng_element_snapshot_session_name,
2303                         current_session_name);
2304         if (ret) {
2305                 goto end;
2306         }
2307
2308         /* Close snapshot element */
2309         ret = mi_lttng_writer_close_element(writer);
2310
2311 end:
2312         return ret;
2313 }
2314
2315 int mi_lttng_snapshot_add_output(struct mi_writer *writer,
2316                 const char *current_session_name, const char *n_ptr,
2317                 struct lttng_snapshot_output *output)
2318 {
2319         int ret;
2320
2321         /* Open element snapshot */
2322         ret = mi_lttng_writer_open_element(writer,
2323                         mi_lttng_element_command_snapshot);
2324         if (ret) {
2325                 goto end;
2326         }
2327
2328         /* Snapshot output id */
2329         ret = mi_lttng_writer_write_element_unsigned_int(writer,
2330                         mi_lttng_element_id, output->id);
2331         if (ret) {
2332                 goto end;
2333         }
2334
2335         /* Snapshot output names */
2336         ret = mi_lttng_writer_write_element_string(writer,
2337                         config_element_name, n_ptr);
2338         if (ret) {
2339                 goto end;
2340         }
2341
2342         /* Destination of the output (ctrl_url)*/
2343         ret = mi_lttng_writer_write_element_string(writer,
2344                         mi_lttng_element_snapshot_ctrl_url, output->ctrl_url);
2345         if (ret) {
2346                 goto end;
2347         }
2348
2349         /* Snapshot added for session "current_session_name"*/
2350         ret = mi_lttng_writer_write_element_string(writer,
2351                         mi_lttng_element_snapshot_session_name, current_session_name);
2352         if (ret) {
2353                 goto end;
2354         }
2355
2356         /* total size of all stream combined */
2357         ret = mi_lttng_writer_write_element_unsigned_int(writer,
2358                         mi_lttng_element_snapshot_max_size, output->max_size);
2359         if (ret) {
2360                 goto end;
2361         }
2362
2363         /* Close snapshot element */
2364         ret = mi_lttng_writer_close_element(writer);
2365
2366 end:
2367         return ret;
2368 }
2369
2370 int mi_lttng_snapshot_record(struct mi_writer *writer,
2371                 const char *current_session_name, const char *url,
2372                 const char *cmdline_ctrl_url, const char *cmdline_data_url)
2373 {
2374         int ret;
2375
2376         /* Open element snapshot */
2377         ret = mi_lttng_writer_open_element(writer,
2378                         mi_lttng_element_command_snapshot);
2379         if (ret) {
2380                 goto end;
2381         }
2382
2383         /*
2384          * If a valid an URL was given, serialize it,
2385          * else take the command line data and ctrl urls*/
2386         if (url) {
2387                 /* Destination of the output (ctrl_url)*/
2388                 ret = mi_lttng_writer_write_element_string(writer,
2389                                 mi_lttng_element_snapshot_ctrl_url, url);
2390                 if (ret) {
2391                         goto end;
2392                 }
2393         } else if (cmdline_ctrl_url) {
2394                 /* Destination of the output (ctrl_url)*/
2395                 ret = mi_lttng_writer_write_element_string(writer,
2396                                 mi_lttng_element_snapshot_ctrl_url, cmdline_ctrl_url);
2397                 if (ret) {
2398                         goto end;
2399                 }
2400
2401                 /* Destination of the output (data_url) */
2402                 ret = mi_lttng_writer_write_element_string(writer,
2403                                 mi_lttng_element_snapshot_data_url, cmdline_data_url);
2404                 if (ret) {
2405                         goto end;
2406                 }
2407         }
2408
2409         /* Close record_snapshot element */
2410         ret = mi_lttng_writer_close_element(writer);
2411
2412 end:
2413         return ret;
2414 }
2415
2416 int mi_lttng_rotation_schedule(struct mi_writer *writer,
2417                 const struct lttng_rotation_schedule *schedule)
2418 {
2419         int ret = 0;
2420         enum lttng_rotation_status status;
2421         uint64_t value;
2422         const char *element_name;
2423         const char *value_name;
2424         bool empty_schedule = false;
2425
2426         switch (lttng_rotation_schedule_get_type(schedule)) {
2427         case LTTNG_ROTATION_SCHEDULE_TYPE_PERIODIC:
2428                 status = lttng_rotation_schedule_periodic_get_period(schedule,
2429                                 &value);
2430                 element_name = mi_lttng_element_rotation_schedule_periodic;
2431                 value_name = mi_lttng_element_rotation_schedule_periodic_time_us;
2432                 break;
2433         case LTTNG_ROTATION_SCHEDULE_TYPE_SIZE_THRESHOLD:
2434                 status = lttng_rotation_schedule_size_threshold_get_threshold(
2435                                 schedule, &value);
2436                 element_name = mi_lttng_element_rotation_schedule_size_threshold;
2437                 value_name = mi_lttng_element_rotation_schedule_size_threshold_bytes;
2438                 break;
2439         default:
2440                 ret = -1;
2441                 goto end;
2442         }
2443
2444         if (status != LTTNG_ROTATION_STATUS_OK) {
2445                 if (status == LTTNG_ROTATION_STATUS_UNAVAILABLE) {
2446                         empty_schedule = true;
2447                 } else {
2448                         ret = -1;
2449                         goto end;
2450                 }
2451         }
2452
2453         ret = mi_lttng_writer_open_element(writer, element_name);
2454         if (ret) {
2455                 goto end;
2456         }
2457
2458         if (!empty_schedule) {
2459                 ret = mi_lttng_writer_write_element_unsigned_int(writer,
2460                                 value_name, value);
2461                 if (ret) {
2462                         goto end;
2463                 }
2464         }
2465
2466         /* Close schedule descriptor element. */
2467         ret = mi_lttng_writer_close_element(writer);
2468         if (ret) {
2469                 goto end;
2470         }
2471 end:
2472         return ret;
2473 }
2474
2475 int mi_lttng_rotation_schedule_result(struct mi_writer *writer,
2476                 const struct lttng_rotation_schedule *schedule,
2477                 bool success)
2478 {
2479         int ret = 0;
2480
2481         ret = mi_lttng_writer_open_element(writer,
2482                         mi_lttng_element_rotation_schedule_result);
2483         if (ret) {
2484                 goto end;
2485         }
2486
2487         ret = mi_lttng_writer_open_element(writer,
2488                         mi_lttng_element_rotation_schedule);
2489         if (ret) {
2490                 goto end;
2491         }
2492
2493         ret = mi_lttng_rotation_schedule(writer, schedule);
2494         if (ret) {
2495                 goto end;
2496         }
2497
2498         /* Close rotation_schedule element */
2499         ret = mi_lttng_writer_close_element(writer);
2500         if (ret) {
2501                 goto end;
2502         }
2503
2504         ret = mi_lttng_writer_write_element_bool(writer,
2505                         mi_lttng_element_command_success, success);
2506         if (ret) {
2507                 goto end;
2508         }
2509
2510         /* Close rotation_schedule_result element */
2511         ret = mi_lttng_writer_close_element(writer);
2512         if (ret) {
2513                 goto end;
2514         }
2515 end:
2516         return ret;
2517 }
2518
2519 static
2520 int mi_lttng_location(struct mi_writer *writer,
2521                 const struct lttng_trace_archive_location *location)
2522 {
2523         int ret = 0;
2524         enum lttng_trace_archive_location_type location_type;
2525         enum lttng_trace_archive_location_status status;
2526
2527         location_type = lttng_trace_archive_location_get_type(location);
2528
2529         switch (location_type) {
2530         case LTTNG_TRACE_ARCHIVE_LOCATION_TYPE_LOCAL:
2531         {
2532                 const char *absolute_path;
2533
2534                 status = lttng_trace_archive_location_local_get_absolute_path(
2535                                 location, &absolute_path);
2536                 if (status != LTTNG_TRACE_ARCHIVE_LOCATION_STATUS_OK) {
2537                         ret = -1;
2538                         goto end;
2539                 }
2540
2541                 ret = mi_lttng_writer_open_element(writer,
2542                                 mi_lttng_element_rotation_location_local);
2543                 if (ret) {
2544                         goto end;
2545                 }
2546
2547
2548                 ret = mi_lttng_writer_write_element_string(writer,
2549                                 mi_lttng_element_rotation_location_local_absolute_path,
2550                                 absolute_path);
2551                 if (ret) {
2552                         goto end;
2553                 }
2554
2555                 /* Close local element */
2556                 ret = mi_lttng_writer_close_element(writer);
2557                 if (ret) {
2558                         goto end;
2559                 }
2560                 break;
2561         }
2562         case LTTNG_TRACE_ARCHIVE_LOCATION_TYPE_RELAY:
2563         {
2564                 uint16_t control_port, data_port;
2565                 const char *host, *relative_path;
2566                 enum lttng_trace_archive_location_relay_protocol_type protocol;
2567
2568                 /* Fetch all relay location parameters. */
2569                 status = lttng_trace_archive_location_relay_get_protocol_type(
2570                                 location, &protocol);
2571                 if (status != LTTNG_TRACE_ARCHIVE_LOCATION_STATUS_OK) {
2572                         ret = -1;
2573                         goto end;
2574                 }
2575
2576                 status = lttng_trace_archive_location_relay_get_host(
2577                                 location, &host);
2578                 if (status != LTTNG_TRACE_ARCHIVE_LOCATION_STATUS_OK) {
2579                         ret = -1;
2580                         goto end;
2581                 }
2582
2583                 status = lttng_trace_archive_location_relay_get_control_port(
2584                                 location, &control_port);
2585                 if (status != LTTNG_TRACE_ARCHIVE_LOCATION_STATUS_OK) {
2586                         ret = -1;
2587                         goto end;
2588                 }
2589
2590                 status = lttng_trace_archive_location_relay_get_data_port(
2591                                 location, &data_port);
2592                 if (status != LTTNG_TRACE_ARCHIVE_LOCATION_STATUS_OK) {
2593                         ret = -1;
2594                         goto end;
2595                 }
2596
2597                 status = lttng_trace_archive_location_relay_get_relative_path(
2598                                 location, &relative_path);
2599                 if (status != LTTNG_TRACE_ARCHIVE_LOCATION_STATUS_OK) {
2600                         ret = -1;
2601                         goto end;
2602                 }
2603
2604                 ret = mi_lttng_writer_open_element(writer,
2605                                 mi_lttng_element_rotation_location_relay);
2606                 if (ret) {
2607                         goto end;
2608                 }
2609
2610                 ret = mi_lttng_writer_write_element_string(writer,
2611                                 mi_lttng_element_rotation_location_relay_host,
2612                                 host);
2613                 if (ret) {
2614                         goto end;
2615                 }
2616
2617                 ret = mi_lttng_writer_write_element_unsigned_int(writer,
2618                                 mi_lttng_element_rotation_location_relay_control_port,
2619                                 control_port);
2620                 if (ret) {
2621                         goto end;
2622                 }
2623
2624                 ret = mi_lttng_writer_write_element_unsigned_int(writer,
2625                                 mi_lttng_element_rotation_location_relay_data_port,
2626                                 data_port);
2627                 if (ret) {
2628                         goto end;
2629                 }
2630
2631                 ret = mi_lttng_writer_write_element_string(writer,
2632                                 mi_lttng_element_rotation_location_relay_protocol,
2633                                 mi_lttng_trace_archive_location_relay_protocol_type_string(protocol));
2634                 if (ret) {
2635                         goto end;
2636                 }
2637
2638                 ret = mi_lttng_writer_write_element_string(writer,
2639                                 mi_lttng_element_rotation_location_relay_relative_path,
2640                                 relative_path);
2641                 if (ret) {
2642                         goto end;
2643                 }
2644
2645                 /* Close relay element */
2646                 ret = mi_lttng_writer_close_element(writer);
2647                 if (ret) {
2648                         goto end;
2649                 }
2650                 break;
2651         }
2652         default:
2653                 abort();
2654         }
2655 end:
2656         return ret;
2657 }
2658
2659 int mi_lttng_rotate(struct mi_writer *writer,
2660                 const char *session_name,
2661                 enum lttng_rotation_state rotation_state,
2662                 const struct lttng_trace_archive_location *location)
2663 {
2664         int ret;
2665
2666         ret = mi_lttng_writer_open_element(writer,
2667                         mi_lttng_element_rotation);
2668         if (ret) {
2669                 goto end;
2670         }
2671
2672         ret = mi_lttng_writer_write_element_string(writer,
2673                         mi_lttng_element_session_name,
2674                         session_name);
2675         if (ret) {
2676                 goto end;
2677         }
2678
2679         ret = mi_lttng_writer_write_element_string(writer,
2680                         mi_lttng_element_rotation_state,
2681                         mi_lttng_rotation_state_string(rotation_state));
2682         if (ret) {
2683                 goto end;
2684         }
2685
2686         if (!location) {
2687                 /* Not a serialization error. */
2688                 goto close_rotation;
2689         }
2690
2691         ret = mi_lttng_writer_open_element(writer,
2692                         mi_lttng_element_rotation_location);
2693         if (ret) {
2694                 goto end;
2695         }
2696
2697         ret = mi_lttng_location(writer, location);
2698         if (ret) {
2699                 goto close_location;
2700         }
2701
2702 close_location:
2703         /* Close location element */
2704         ret = mi_lttng_writer_close_element(writer);
2705         if (ret) {
2706                 goto end;
2707         }
2708
2709 close_rotation:
2710         /* Close rotation element */
2711         ret = mi_lttng_writer_close_element(writer);
2712         if (ret) {
2713                 goto end;
2714         }
2715 end:
2716         return ret;
2717 }