src/common/mi-lttng.c

   1 /*
   2  * Copyright (C) 2014 - Jonathan Rajotte <jonathan.r.julien@gmail.com>
   3  *                    - Olivier Cotte <olivier.cotte@polymtl.ca>
   4  * Copyright (C) 2016 - Jérémie Galarneau <jeremie.galarneau@efficios.com>
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License, version 2 only, as
   8  * published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
  13  * more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along with
  16  * this program; if not, write to the Free Software Foundation, Inc., 51
  17  * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18  */
  19
  20 #define _LGPL_SOURCE
  21 #include <common/config/session-config.h>
  22 #include <common/defaults.h>
  23 #include <lttng/snapshot-internal.h>
  24 #include <lttng/channel.h>
  25 #include "mi-lttng.h"
  26
  27 #include <assert.h>
  28
  29 #define MI_SCHEMA_MAJOR_VERSION 3
  30 #define MI_SCHEMA_MINOR_VERSION 0
  31
  32 /* Machine interface namespace URI */
  33 LTTNG_HIDDEN const char * const mi_lttng_xmlns = "xmlns";
  34 LTTNG_HIDDEN const char * const mi_lttng_xmlns_xsi = "xmlns:xsi";
  35 LTTNG_HIDDEN const char * const mi_lttng_w3_schema_uri = "http://www.w3.org/2001/XMLSchema-instance";
  36 LTTNG_HIDDEN const char * const mi_lttng_schema_location = "xsi:schemaLocation";
  37 LTTNG_HIDDEN const char * const mi_lttng_schema_location_uri =
  38         DEFAULT_LTTNG_MI_NAMESPACE " "
  39         "http://lttng.org/xml/schemas/lttng-mi/" XSTR(MI_SCHEMA_MAJOR_VERSION)
  40         "/lttng-mi-" XSTR(MI_SCHEMA_MAJOR_VERSION) "."
  41         XSTR(MI_SCHEMA_MINOR_VERSION) ".xsd";
  42 LTTNG_HIDDEN const char * const mi_lttng_schema_version = "schemaVersion";
  43 LTTNG_HIDDEN const char * const mi_lttng_schema_version_value = XSTR(MI_SCHEMA_MAJOR_VERSION)
  44         "." XSTR(MI_SCHEMA_MINOR_VERSION);
  45
  46 /* Strings related to command */
  47 const char * const mi_lttng_element_command = "command";
  48 const char * const mi_lttng_element_command_action = "snapshot_action";
  49 const char * const mi_lttng_element_command_add_context = "add-context";
  50 const char * const mi_lttng_element_command_create = "create";
  51 const char * const mi_lttng_element_command_destroy = "destroy";
  52 const char * const mi_lttng_element_command_disable_channel = "disable-channel";
  53 const char * const mi_lttng_element_command_disable_event = "disable-event";
  54 const char * const mi_lttng_element_command_enable_channels = "enable-channel";
  55 const char * const mi_lttng_element_command_enable_event = "enable-event";
  56 const char * const mi_lttng_element_command_list = "list";
  57 const char * const mi_lttng_element_command_load = "load";
  58 LTTNG_HIDDEN const char * const mi_lttng_element_command_metadata = "metadata";
  59 LTTNG_HIDDEN const char * const mi_lttng_element_command_metadata_action = "metadata_action";
  60 LTTNG_HIDDEN const char * const mi_lttng_element_command_regenerate = "regenerate";
  61 LTTNG_HIDDEN const char * const mi_lttng_element_command_regenerate_action = "regenerate_action";
  62 const char * const mi_lttng_element_command_name = "name";
  63 const char * const mi_lttng_element_command_output = "output";
  64 const char * const mi_lttng_element_command_save = "save";
  65 const char * const mi_lttng_element_command_set_session = "set-session";
  66 const char * const mi_lttng_element_command_snapshot = "snapshot";
  67 const char * const mi_lttng_element_command_snapshot_add = "add_snapshot";
  68 const char * const mi_lttng_element_command_snapshot_del = "del_snapshot";
  69 const char * const mi_lttng_element_command_snapshot_list = "list_snapshot";
  70 const char * const mi_lttng_element_command_snapshot_record = "record_snapshot";
  71 const char * const mi_lttng_element_command_start = "start";
  72 const char * const mi_lttng_element_command_stop = "stop";
  73 const char * const mi_lttng_element_command_success = "success";
  74 const char * const mi_lttng_element_command_track = "track";
  75 const char * const mi_lttng_element_command_untrack = "untrack";
  76 const char * const mi_lttng_element_command_version = "version";
  77 const char * const mi_lttng_element_command_rotate = "rotate";
  78
  79 /* Strings related to version command */
  80 const char * const mi_lttng_element_version = "version";
  81 const char * const mi_lttng_element_version_commit = "commit";
  82 const char * const mi_lttng_element_version_description = "description";
  83 const char * const mi_lttng_element_version_license = "license";
  84 const char * const mi_lttng_element_version_major = "major";
  85 const char * const mi_lttng_element_version_minor = "minor";
  86 const char * const mi_lttng_element_version_patch_level = "patchLevel";
  87 const char * const mi_lttng_element_version_str = "string";
  88 const char * const mi_lttng_element_version_web = "url";
  89
  90 /* String related to a lttng_event_field */
  91 const char * const mi_lttng_element_event_field = "event_field";
  92 const char * const mi_lttng_element_event_fields = "event_fields";
  93
  94 /* String related to lttng_event_perf_counter_ctx */
  95 const char * const mi_lttng_element_perf_counter_context = "perf";
  96
  97 /* Strings related to pid */
  98 const char * const mi_lttng_element_pid_id = "id";
  99
 100 /* Strings related to save command */
 101 const char * const mi_lttng_element_save = "save";
 102
 103 /* Strings related to load command */
 104 const char * const mi_lttng_element_load = "load";
 105 LTTNG_HIDDEN const char * const mi_lttng_element_load_overrides = "overrides";
 106 LTTNG_HIDDEN const char * const mi_lttng_element_load_override_url = "url";
 107
 108 /* General elements of mi_lttng */
 109 const char * const mi_lttng_element_empty = "";
 110 const char * const mi_lttng_element_id = "id";
 111 const char * const mi_lttng_element_nowrite = "nowrite";
 112 const char * const mi_lttng_element_success = "success";
 113 const char * const mi_lttng_element_type_enum = "ENUM";
 114 const char * const mi_lttng_element_type_float = "FLOAT";
 115 const char * const mi_lttng_element_type_integer = "INTEGER";
 116 const char * const mi_lttng_element_type_other = "OTHER";
 117 const char * const mi_lttng_element_type_string = "STRING";
 118
 119 /* String related to loglevel */
 120 const char * const mi_lttng_loglevel_str_alert = "TRACE_ALERT";
 121 const char * const mi_lttng_loglevel_str_crit = "TRACE_CRIT";
 122 const char * const mi_lttng_loglevel_str_debug = "TRACE_DEBUG";
 123 const char * const mi_lttng_loglevel_str_debug_function = "TRACE_DEBUG_FUNCTION";
 124 const char * const mi_lttng_loglevel_str_debug_line = "TRACE_DEBUG_LINE";
 125 const char * const mi_lttng_loglevel_str_debug_module = "TRACE_DEBUG_MODULE";
 126 const char * const mi_lttng_loglevel_str_debug_process = "TRACE_DEBUG_PROCESS";
 127 const char * const mi_lttng_loglevel_str_debug_program = "TRACE_DEBUG_PROGRAM";
 128 const char * const mi_lttng_loglevel_str_debug_system = "TRACE_DEBUG_SYSTEM";
 129 const char * const mi_lttng_loglevel_str_debug_unit = "TRACE_DEBUG_UNIT";
 130 const char * const mi_lttng_loglevel_str_emerg = "TRACE_EMERG";
 131 const char * const mi_lttng_loglevel_str_err = "TRACE_ERR";
 132 const char * const mi_lttng_loglevel_str_info = "TRACE_INFO";
 133 const char * const mi_lttng_loglevel_str_notice = "TRACE_NOTICE";
 134 const char * const mi_lttng_loglevel_str_unknown = "UNKNOWN";
 135 const char * const mi_lttng_loglevel_str_warning = "TRACE_WARNING";
 136
 137 /* String related to loglevel JUL */
 138 const char * const mi_lttng_loglevel_str_jul_all = "JUL_ALL";
 139 const char * const mi_lttng_loglevel_str_jul_config = "JUL_CONFIG";
 140 const char * const mi_lttng_loglevel_str_jul_fine = "JUL_FINE";
 141 const char * const mi_lttng_loglevel_str_jul_finer = "JUL_FINER";
 142 const char * const mi_lttng_loglevel_str_jul_finest = "JUL_FINEST";
 143 const char * const mi_lttng_loglevel_str_jul_info = "JUL_INFO";
 144 const char * const mi_lttng_loglevel_str_jul_off = "JUL_OFF";
 145 const char * const mi_lttng_loglevel_str_jul_severe = "JUL_SEVERE";
 146 const char * const mi_lttng_loglevel_str_jul_warning = "JUL_WARNING";
 147
 148 /* String related to loglevel LOG4J */
 149 const char * const mi_lttng_loglevel_str_log4j_off = "LOG4J_OFF";
 150 const char * const mi_lttng_loglevel_str_log4j_fatal = "LOG4J_FATAL";
 151 const char * const mi_lttng_loglevel_str_log4j_error = "LOG4J_ERROR";
 152 const char * const mi_lttng_loglevel_str_log4j_warn = "LOG4J_WARN";
 153 const char * const mi_lttng_loglevel_str_log4j_info = "LOG4J_INFO";
 154 const char * const mi_lttng_loglevel_str_log4j_debug = "LOG4J_DEBUG";
 155 const char * const mi_lttng_loglevel_str_log4j_trace = "LOG4J_TRACE";
 156 const char * const mi_lttng_loglevel_str_log4j_all = "LOG4J_ALL";
 157
 158 /* String related to loglevel Python */
 159 const char * const mi_lttng_loglevel_str_python_critical = "PYTHON_CRITICAL";
 160 const char * const mi_lttng_loglevel_str_python_error = "PYTHON_ERROR";
 161 const char * const mi_lttng_loglevel_str_python_warning = "PYTHON_WARNING";
 162 const char * const mi_lttng_loglevel_str_python_info = "PYTHON_INFO";
 163 const char * const mi_lttng_loglevel_str_python_debug = "PYTHON_DEBUG";
 164 const char * const mi_lttng_loglevel_str_python_notset = "PYTHON_NOTSET";
 165
 166 /* String related to loglevel type */
 167 const char * const mi_lttng_loglevel_type_all = "ALL";
 168 const char * const mi_lttng_loglevel_type_range = "RANGE";
 169 const char * const mi_lttng_loglevel_type_single = "SINGLE";
 170 const char * const mi_lttng_loglevel_type_unknown = "UNKNOWN";
 171
 172 /* String related to a lttng_snapshot_output */
 173 const char * const mi_lttng_element_snapshot_ctrl_url = "ctrl_url";
 174 const char * const mi_lttng_element_snapshot_data_url = "data_url";
 175 const char * const mi_lttng_element_snapshot_max_size = "max_size";
 176 const char * const mi_lttng_element_snapshot_n_ptr = "n_ptr";
 177 const char * const mi_lttng_element_snapshot_session_name = "session_name";
 178 const char * const mi_lttng_element_snapshots = "snapshots";
 179
 180 /* String related to track/untrack command */
 181 const char * const mi_lttng_element_track_untrack_all_wildcard = "*";
 182
 183 LTTNG_HIDDEN const char * const mi_lttng_element_session_name = "session_name";
 184
 185 /* String related to rotate command */
 186 LTTNG_HIDDEN const char * const mi_lttng_element_rotation = "rotation";
 187 LTTNG_HIDDEN const char * const mi_lttng_element_rotations = "rotations";
 188 LTTNG_HIDDEN const char * const mi_lttng_element_rotate_status = "status";
 189
 190 /* Deprecated symbols preserved for ABI compatibility. */
 191 const char * const mi_lttng_context_type_perf_counter;
 192 const char * const mi_lttng_context_type_perf_cpu_counter;
 193 const char * const mi_lttng_context_type_perf_thread_counter;
 194 const char * const mi_lttng_element_track_untrack_pid_target;
 195 const char * const mi_lttng_element_track_untrack_targets;
 196 const char * const mi_lttng_element_calibrate;
 197 const char * const mi_lttng_element_calibrate_function;
 198 const char * const mi_lttng_element_command_calibrate;
 199
 200 /* This is a merge of jul loglevel and regular loglevel
 201  * Those should never overlap by definition
 202  * (see struct lttng_event loglevel)
 203  */
 204 LTTNG_HIDDEN
 205 const char *mi_lttng_loglevel_string(int value, enum lttng_domain_type domain)
 206 {
 207         switch (domain) {
 208         case LTTNG_DOMAIN_KERNEL:
 209         case LTTNG_DOMAIN_UST:
 210                 switch (value) {
 211                 case -1:
 212                         return mi_lttng_element_empty;
 213                 case LTTNG_LOGLEVEL_EMERG:
 214                         return mi_lttng_loglevel_str_emerg;
 215                 case LTTNG_LOGLEVEL_ALERT:
 216                         return mi_lttng_loglevel_str_alert;
 217                 case LTTNG_LOGLEVEL_CRIT:
 218                         return mi_lttng_loglevel_str_crit;
 219                 case LTTNG_LOGLEVEL_ERR:
 220                         return mi_lttng_loglevel_str_err;
 221                 case LTTNG_LOGLEVEL_WARNING:
 222                         return mi_lttng_loglevel_str_warning;
 223                 case LTTNG_LOGLEVEL_NOTICE:
 224                         return mi_lttng_loglevel_str_notice;
 225                 case LTTNG_LOGLEVEL_INFO:
 226                         return mi_lttng_loglevel_str_info;
 227                 case LTTNG_LOGLEVEL_DEBUG_SYSTEM:
 228                         return mi_lttng_loglevel_str_debug_system;
 229                 case LTTNG_LOGLEVEL_DEBUG_PROGRAM:
 230                         return mi_lttng_loglevel_str_debug_program;
 231                 case LTTNG_LOGLEVEL_DEBUG_PROCESS:
 232                         return mi_lttng_loglevel_str_debug_process;
 233                 case LTTNG_LOGLEVEL_DEBUG_MODULE:
 234                         return mi_lttng_loglevel_str_debug_module;
 235                 case LTTNG_LOGLEVEL_DEBUG_UNIT:
 236                         return mi_lttng_loglevel_str_debug_unit;
 237                 case LTTNG_LOGLEVEL_DEBUG_FUNCTION:
 238                         return mi_lttng_loglevel_str_debug_function;
 239                 case LTTNG_LOGLEVEL_DEBUG_LINE:
 240                         return mi_lttng_loglevel_str_debug_line;
 241                 case LTTNG_LOGLEVEL_DEBUG:
 242                         return mi_lttng_loglevel_str_debug;
 243                 default:
 244                         return mi_lttng_loglevel_str_unknown;
 245                 }
 246                 break;
 247         case LTTNG_DOMAIN_LOG4J:
 248                 switch (value) {
 249                 case -1:
 250                         return mi_lttng_element_empty;
 251                 case LTTNG_LOGLEVEL_LOG4J_OFF:
 252                         return mi_lttng_loglevel_str_log4j_off;
 253                 case LTTNG_LOGLEVEL_LOG4J_FATAL:
 254                         return mi_lttng_loglevel_str_log4j_fatal;
 255                 case LTTNG_LOGLEVEL_LOG4J_ERROR:
 256                         return mi_lttng_loglevel_str_log4j_error;
 257                 case LTTNG_LOGLEVEL_LOG4J_WARN:
 258                         return mi_lttng_loglevel_str_log4j_warn;
 259                 case LTTNG_LOGLEVEL_LOG4J_INFO:
 260                         return mi_lttng_loglevel_str_log4j_info;
 261                 case LTTNG_LOGLEVEL_LOG4J_DEBUG:
 262                         return mi_lttng_loglevel_str_log4j_debug;
 263                 case LTTNG_LOGLEVEL_LOG4J_TRACE:
 264                         return mi_lttng_loglevel_str_log4j_trace;
 265                 case LTTNG_LOGLEVEL_LOG4J_ALL:
 266                         return mi_lttng_loglevel_str_log4j_all;
 267                 default:
 268                         return mi_lttng_loglevel_str_unknown;
 269                 }
 270                 break;
 271         case LTTNG_DOMAIN_JUL:
 272                 switch (value) {
 273                 case -1:
 274                         return mi_lttng_element_empty;
 275                 case LTTNG_LOGLEVEL_JUL_OFF:
 276                         return mi_lttng_loglevel_str_jul_off;
 277                 case LTTNG_LOGLEVEL_JUL_SEVERE:
 278                         return mi_lttng_loglevel_str_jul_severe;
 279                 case LTTNG_LOGLEVEL_JUL_WARNING:
 280                         return mi_lttng_loglevel_str_jul_warning;
 281                 case LTTNG_LOGLEVEL_JUL_INFO:
 282                         return mi_lttng_loglevel_str_jul_info;
 283                 case LTTNG_LOGLEVEL_JUL_CONFIG:
 284                         return mi_lttng_loglevel_str_jul_config;
 285                 case LTTNG_LOGLEVEL_JUL_FINE:
 286                         return mi_lttng_loglevel_str_jul_fine;
 287                 case LTTNG_LOGLEVEL_JUL_FINER:
 288                         return mi_lttng_loglevel_str_jul_finer;
 289                 case LTTNG_LOGLEVEL_JUL_FINEST:
 290                         return mi_lttng_loglevel_str_jul_finest;
 291                 case LTTNG_LOGLEVEL_JUL_ALL:
 292                         return mi_lttng_loglevel_str_jul_all;
 293                 default:
 294                         return mi_lttng_loglevel_str_unknown;
 295                 }
 296                 break;
 297         case LTTNG_DOMAIN_PYTHON:
 298                 switch (value) {
 299                 case LTTNG_LOGLEVEL_PYTHON_CRITICAL:
 300                         return mi_lttng_loglevel_str_python_critical;
 301                 case LTTNG_LOGLEVEL_PYTHON_ERROR:
 302                         return mi_lttng_loglevel_str_python_error;
 303                 case LTTNG_LOGLEVEL_PYTHON_WARNING:
 304                         return mi_lttng_loglevel_str_python_warning;
 305                 case LTTNG_LOGLEVEL_PYTHON_INFO:
 306                         return mi_lttng_loglevel_str_python_info;
 307                 case LTTNG_LOGLEVEL_PYTHON_DEBUG:
 308                         return mi_lttng_loglevel_str_python_debug;
 309                 case LTTNG_LOGLEVEL_PYTHON_NOTSET:
 310                         return mi_lttng_loglevel_str_python_notset;
 311                 default:
 312                         return mi_lttng_loglevel_str_unknown;
 313                 }
 314                 break;
 315         default:
 316                 return mi_lttng_loglevel_str_unknown;
 317         }
 318 }
 319
 320 LTTNG_HIDDEN
 321 const char *mi_lttng_logleveltype_string(enum lttng_loglevel_type value)
 322 {
 323         switch (value) {
 324         case LTTNG_EVENT_LOGLEVEL_ALL:
 325                 return mi_lttng_loglevel_type_all;
 326         case LTTNG_EVENT_LOGLEVEL_RANGE:
 327                 return mi_lttng_loglevel_type_range;
 328         case LTTNG_EVENT_LOGLEVEL_SINGLE:
 329                 return mi_lttng_loglevel_type_single;
 330         default:
 331                 return mi_lttng_loglevel_type_unknown;
 332         }
 333 }
 334
 335 LTTNG_HIDDEN
 336 const char *mi_lttng_eventtype_string(enum lttng_event_type value)
 337 {
 338         switch (value) {
 339         case LTTNG_EVENT_ALL:
 340                 return config_event_type_all;
 341         case LTTNG_EVENT_TRACEPOINT:
 342                 return config_event_type_tracepoint;
 343         case LTTNG_EVENT_PROBE:
 344                 return config_event_type_probe;
 345         case LTTNG_EVENT_FUNCTION:
 346                 return config_event_type_function;
 347         case LTTNG_EVENT_FUNCTION_ENTRY:
 348                 return config_event_type_function_entry;
 349         case LTTNG_EVENT_SYSCALL:
 350                 return config_event_type_syscall;
 351         case LTTNG_EVENT_NOOP:
 352                 return config_event_type_noop;
 353         default:
 354                 return mi_lttng_element_empty;
 355         }
 356 }
 357
 358 static
 359 const char *mi_lttng_event_contexttype_string(enum lttng_event_context_type val)
 360 {
 361         switch (val) {
 362         case LTTNG_EVENT_CONTEXT_PID:
 363                 return config_event_context_pid;
 364         case LTTNG_EVENT_CONTEXT_PROCNAME:
 365                 return config_event_context_procname;
 366         case LTTNG_EVENT_CONTEXT_PRIO:
 367                 return config_event_context_prio;
 368         case LTTNG_EVENT_CONTEXT_NICE:
 369                 return config_event_context_nice;
 370         case LTTNG_EVENT_CONTEXT_VPID:
 371                 return config_event_context_vpid;
 372         case LTTNG_EVENT_CONTEXT_TID:
 373                 return config_event_context_tid;
 374         case LTTNG_EVENT_CONTEXT_VTID:
 375                 return config_event_context_vtid;
 376         case LTTNG_EVENT_CONTEXT_PPID:
 377                 return config_event_context_ppid;
 378         case LTTNG_EVENT_CONTEXT_VPPID:
 379                 return config_event_context_vppid;
 380         case LTTNG_EVENT_CONTEXT_PTHREAD_ID:
 381                 return config_event_context_pthread_id;
 382         case LTTNG_EVENT_CONTEXT_HOSTNAME:
 383                 return config_event_context_hostname;
 384         case LTTNG_EVENT_CONTEXT_IP:
 385                 return config_event_context_ip;
 386         case LTTNG_EVENT_CONTEXT_INTERRUPTIBLE:
 387                 return config_event_context_interruptible;
 388         case LTTNG_EVENT_CONTEXT_PREEMPTIBLE:
 389                 return config_event_context_preemptible;
 390         case LTTNG_EVENT_CONTEXT_NEED_RESCHEDULE:
 391                 return config_event_context_need_reschedule;
 392         case LTTNG_EVENT_CONTEXT_MIGRATABLE:
 393                 return config_event_context_migratable;
 394         default:
 395                 return NULL;
 396         }
 397 }
 398
 399 LTTNG_HIDDEN
 400 const char *mi_lttng_eventfieldtype_string(enum lttng_event_field_type val)
 401 {
 402         switch (val) {
 403         case(LTTNG_EVENT_FIELD_INTEGER):
 404                 return mi_lttng_element_type_integer;
 405         case(LTTNG_EVENT_FIELD_ENUM):
 406                 return mi_lttng_element_type_enum;
 407         case(LTTNG_EVENT_FIELD_FLOAT):
 408                 return mi_lttng_element_type_float;
 409         case(LTTNG_EVENT_FIELD_STRING):
 410                 return mi_lttng_element_type_string;
 411         default:
 412                 return mi_lttng_element_type_other;
 413         }
 414 }
 415
 416 LTTNG_HIDDEN
 417 const char *mi_lttng_domaintype_string(enum lttng_domain_type value)
 418 {
 419         /* Note: This is a *duplicate* of get_domain_str from bin/lttng/utils.c */
 420         switch (value) {
 421         case LTTNG_DOMAIN_KERNEL:
 422                 return config_domain_type_kernel;
 423         case LTTNG_DOMAIN_UST:
 424                 return config_domain_type_ust;
 425         case LTTNG_DOMAIN_JUL:
 426                 return config_domain_type_jul;
 427         case LTTNG_DOMAIN_LOG4J:
 428                 return config_domain_type_log4j;
 429         case LTTNG_DOMAIN_PYTHON:
 430                 return config_domain_type_python;
 431         default:
 432                 /* Should not have an unknown domain */
 433                 assert(0);
 434                 return NULL;
 435         }
 436 }
 437
 438 LTTNG_HIDDEN
 439 const char *mi_lttng_buffertype_string(enum lttng_buffer_type value)
 440 {
 441         switch (value) {
 442         case LTTNG_BUFFER_PER_PID:
 443                 return config_buffer_type_per_pid;
 444         case LTTNG_BUFFER_PER_UID:
 445                 return config_buffer_type_per_uid;
 446         case LTTNG_BUFFER_GLOBAL:
 447                 return config_buffer_type_global;
 448         default:
 449                 /* Should not have an unknow buffer type */
 450                 assert(0);
 451                 return NULL;
 452         }
 453 }
 454
 455 LTTNG_HIDDEN
 456 struct mi_writer *mi_lttng_writer_create(int fd_output, int mi_output_type)
 457 {
 458         struct mi_writer *mi_writer;
 459
 460         mi_writer = zmalloc(sizeof(struct mi_writer));
 461         if (!mi_writer) {
 462                 PERROR("zmalloc mi_writer_create");
 463                 goto end;
 464         }
 465         if (mi_output_type == LTTNG_MI_XML) {
 466                 mi_writer->writer = config_writer_create(fd_output, 0);
 467                 if (!mi_writer->writer) {
 468                         goto err_destroy;
 469                 }
 470                 mi_writer->type = LTTNG_MI_XML;
 471         } else {
 472                 goto err_destroy;
 473         }
 474
 475 end:
 476         return mi_writer;
 477
 478 err_destroy:
 479         free(mi_writer);
 480         return NULL;
 481 }
 482
 483 LTTNG_HIDDEN
 484 int mi_lttng_writer_destroy(struct mi_writer *writer)
 485 {
 486         int ret;
 487
 488         if (!writer) {
 489                 ret = -EINVAL;
 490                 goto end;
 491         }
 492
 493         ret = config_writer_destroy(writer->writer);
 494         if (ret < 0) {
 495                 goto end;
 496         }
 497
 498         free(writer);
 499 end:
 500         return ret;
 501 }
 502
 503 LTTNG_HIDDEN
 504 int mi_lttng_writer_command_open(struct mi_writer *writer, const char *command)
 505 {
 506         int ret;
 507
 508         /*
 509          * A command is always the MI's root node, it must declare the current
 510          * namespace and schema URIs and the schema's version.
 511          */
 512         ret = config_writer_open_element(writer->writer,
 513                         mi_lttng_element_command);
 514         if (ret) {
 515                 goto end;
 516         }
 517
 518         ret = config_writer_write_attribute(writer->writer,
 519                         mi_lttng_xmlns, DEFAULT_LTTNG_MI_NAMESPACE);
 520         if (ret) {
 521                 goto end;
 522         }
 523
 524         ret = config_writer_write_attribute(writer->writer,
 525                         mi_lttng_xmlns_xsi, mi_lttng_w3_schema_uri);
 526         if (ret) {
 527                 goto end;
 528         }
 529
 530         ret = config_writer_write_attribute(writer->writer,
 531                         mi_lttng_schema_location,
 532                         mi_lttng_schema_location_uri);
 533         if (ret) {
 534                 goto end;
 535         }
 536
 537         ret = config_writer_write_attribute(writer->writer,
 538                         mi_lttng_schema_version,
 539                         mi_lttng_schema_version_value);
 540         if (ret) {
 541                 goto end;
 542         }
 543
 544         ret = mi_lttng_writer_write_element_string(writer,
 545                         mi_lttng_element_command_name, command);
 546 end:
 547         return ret;
 548 }
 549
 550 LTTNG_HIDDEN
 551 int mi_lttng_writer_command_close(struct mi_writer *writer)
 552 {
 553         return mi_lttng_writer_close_element(writer);
 554 }
 555
 556 LTTNG_HIDDEN
 557 int mi_lttng_writer_open_element(struct mi_writer *writer,
 558                 const char *element_name)
 559 {
 560         return config_writer_open_element(writer->writer, element_name);
 561 }
 562
 563 LTTNG_HIDDEN
 564 int mi_lttng_writer_close_element(struct mi_writer *writer)
 565 {
 566         return config_writer_close_element(writer->writer);
 567 }
 568
 569 LTTNG_HIDDEN
 570 int mi_lttng_close_multi_element(struct mi_writer *writer,
 571                 unsigned int nb_element)
 572 {
 573         int ret, i;
 574
 575         if (nb_element < 1) {
 576                 ret = 0;
 577                 goto end;
 578         }
 579         for (i = 0; i < nb_element; i++) {
 580                 ret = mi_lttng_writer_close_element(writer);
 581                 if (ret) {
 582                         goto end;
 583                 }
 584         }
 585 end:
 586         return ret;
 587 }
 588
 589 LTTNG_HIDDEN
 590 int mi_lttng_writer_write_element_unsigned_int(struct mi_writer *writer,
 591                 const char *element_name, uint64_t value)
 592 {
 593         return config_writer_write_element_unsigned_int(writer->writer,
 594                         element_name, value);
 595 }
 596
 597 LTTNG_HIDDEN
 598 int mi_lttng_writer_write_element_signed_int(struct mi_writer *writer,
 599                 const char *element_name, int64_t value)
 600 {
 601         return config_writer_write_element_signed_int(writer->writer,
 602                         element_name, value);
 603 }
 604
 605 LTTNG_HIDDEN
 606 int mi_lttng_writer_write_element_bool(struct mi_writer *writer,
 607                 const char *element_name, int value)
 608 {
 609         return config_writer_write_element_bool(writer->writer,
 610                         element_name, value);
 611 }
 612
 613 LTTNG_HIDDEN
 614 int mi_lttng_writer_write_element_string(struct mi_writer *writer,
 615                 const char *element_name, const char *value)
 616 {
 617         return config_writer_write_element_string(writer->writer,
 618                         element_name, value);
 619 }
 620
 621 LTTNG_HIDDEN
 622 int mi_lttng_version(struct mi_writer *writer, struct mi_lttng_version *version,
 623         const char *lttng_description, const char *lttng_license)
 624 {
 625         int ret;
 626
 627         /* Open version */
 628         ret = mi_lttng_writer_open_element(writer, mi_lttng_element_version);
 629         if (ret) {
 630                 goto end;
 631         }
 632
 633         /* Version string (contain info like rc etc.) */
 634         ret = mi_lttng_writer_write_element_string(writer,
 635                         mi_lttng_element_version_str, version->version);
 636         if (ret) {
 637                 goto end;
 638         }
 639
 640         /* Major version number */
 641         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 642                         mi_lttng_element_version_major, version->version_major);
 643         if (ret) {
 644                 goto end;
 645         }
 646
 647         /* Minor version number */
 648         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 649                         mi_lttng_element_version_minor, version->version_minor);
 650         if (ret) {
 651                 goto end;
 652         }
 653
 654         /* Commit version number */
 655         ret = mi_lttng_writer_write_element_string(writer,
 656                         mi_lttng_element_version_commit, version->version_commit);
 657         if (ret) {
 658                 goto end;
 659         }
 660
 661         /* Patch number */
 662         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 663                         mi_lttng_element_version_patch_level, version->version_patchlevel);
 664         if (ret) {
 665                 goto end;
 666         }
 667
 668         /* Name of the version */
 669         ret = mi_lttng_writer_write_element_string(writer,
 670                         config_element_name, version->version_name);
 671         if (ret) {
 672                 goto end;
 673         }
 674
 675         /* Description mostly related to beer... */
 676         ret = mi_lttng_writer_write_element_string(writer,
 677                         mi_lttng_element_version_description, lttng_description);
 678         if (ret) {
 679                 goto end;
 680         }
 681
 682         /* url */
 683         ret = mi_lttng_writer_write_element_string(writer,
 684                         mi_lttng_element_version_web, version->package_url);
 685         if (ret) {
 686                 goto end;
 687         }
 688
 689         /* License: free as in free beer...no...*speech* */
 690         ret = mi_lttng_writer_write_element_string(writer,
 691                         mi_lttng_element_version_license, lttng_license);
 692         if (ret) {
 693                 goto end;
 694         }
 695
 696         /* Close version element */
 697         ret = mi_lttng_writer_close_element(writer);
 698
 699 end:
 700         return ret;
 701 }
 702
 703 LTTNG_HIDDEN
 704 int mi_lttng_sessions_open(struct mi_writer *writer)
 705 {
 706         return mi_lttng_writer_open_element(writer, config_element_sessions);
 707 }
 708
 709 LTTNG_HIDDEN
 710 int mi_lttng_session(struct mi_writer *writer,
 711                 struct lttng_session *session, int is_open)
 712 {
 713         int ret;
 714
 715         assert(session);
 716
 717         /* Open sessions element */
 718         ret = mi_lttng_writer_open_element(writer,
 719                         config_element_session);
 720         if (ret) {
 721                 goto end;
 722         }
 723
 724         /* Name of the session */
 725         ret = mi_lttng_writer_write_element_string(writer,
 726                         config_element_name, session->name);
 727         if (ret) {
 728                 goto end;
 729         }
 730
 731         /* Path */
 732         ret = mi_lttng_writer_write_element_string(writer,
 733                         config_element_path, session->path);
 734         if (ret) {
 735                 goto end;
 736         }
 737
 738         /* Enabled ? */
 739         ret = mi_lttng_writer_write_element_bool(writer,
 740                         config_element_enabled, session->enabled);
 741         if (ret) {
 742                 goto end;
 743         }
 744
 745         /* Snapshot mode */
 746         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 747                         config_element_snapshot_mode, session->snapshot_mode);
 748         if (ret) {
 749                 goto end;
 750         }
 751
 752         /* Live timer interval in usec */
 753         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 754                         config_element_live_timer_interval,
 755                         session->live_timer_interval);
 756         if (ret) {
 757                 goto end;
 758         }
 759
 760         if (!is_open) {
 761                 /* Closing session element */
 762                 ret = mi_lttng_writer_close_element(writer);
 763         }
 764 end:
 765         return ret;
 766
 767 }
 768
 769 LTTNG_HIDDEN
 770 int mi_lttng_domains_open(struct mi_writer *writer)
 771 {
 772         return mi_lttng_writer_open_element(writer, config_element_domains);
 773 }
 774
 775 LTTNG_HIDDEN
 776 int mi_lttng_domain(struct mi_writer *writer,
 777                 struct lttng_domain *domain, int is_open)
 778 {
 779         int ret = 0;
 780         const char *str_domain;
 781         const char *str_buffer;
 782
 783         assert(domain);
 784
 785         /* Open domain element */
 786         ret = mi_lttng_writer_open_element(writer, config_element_domain);
 787         if (ret) {
 788                 goto end;
 789         }
 790
 791         /* Domain Type */
 792         str_domain = mi_lttng_domaintype_string(domain->type);
 793         ret = mi_lttng_writer_write_element_string(writer, config_element_type,
 794                         str_domain);
 795         if (ret) {
 796                 goto end;
 797         }
 798
 799         /* Buffer Type */
 800         str_buffer= mi_lttng_buffertype_string(domain->buf_type);
 801         ret = mi_lttng_writer_write_element_string(writer,
 802                         config_element_buffer_type, str_buffer);
 803         if (ret) {
 804                 goto end;
 805         }
 806
 807         /* TODO: union  attr
 808          * This union is not currently used and was added for
 809          * future ust domain support.
 810          * Date: 25-06-2014
 811          * */
 812
 813         if (!is_open) {
 814                 /* Closing domain element */
 815                 ret = mi_lttng_writer_close_element(writer);
 816         }
 817
 818 end:
 819         return ret;
 820
 821 }
 822
 823 LTTNG_HIDDEN
 824 int mi_lttng_channels_open(struct mi_writer *writer)
 825 {
 826         return mi_lttng_writer_open_element(writer, config_element_channels);
 827 }
 828
 829 LTTNG_HIDDEN
 830 int mi_lttng_channel(struct mi_writer *writer,
 831                 struct lttng_channel *channel, int is_open)
 832 {
 833         int ret = 0;
 834
 835         assert(channel);
 836
 837         /* Opening channel element */
 838         ret = mi_lttng_writer_open_element(writer, config_element_channel);
 839         if (ret) {
 840                 goto end;
 841         }
 842
 843         /* Name */
 844         ret = mi_lttng_writer_write_element_string(writer, config_element_name,
 845                         channel->name);
 846         if (ret) {
 847                 goto end;
 848         }
 849
 850         /* Enabled ? */
 851         ret = mi_lttng_writer_write_element_bool(writer,
 852                         config_element_enabled, channel->enabled);
 853         if (ret) {
 854                 goto end;
 855         }
 856
 857         /* Attribute */
 858         ret = mi_lttng_channel_attr(writer, &channel->attr);
 859         if (ret) {
 860                 goto end;
 861         }
 862
 863         if (!is_open) {
 864                 /* Closing channel element */
 865                 ret = mi_lttng_writer_close_element(writer);
 866                 if (ret) {
 867                         goto end;
 868                 }
 869         }
 870 end:
 871         return ret;
 872 }
 873
 874 LTTNG_HIDDEN
 875 int mi_lttng_channel_attr(struct mi_writer *writer,
 876                 struct lttng_channel_attr *attr)
 877 {
 878         int ret = 0;
 879         struct lttng_channel *chan = caa_container_of(attr,
 880                         struct lttng_channel, attr);
 881         uint64_t discarded_events, lost_packets, monitor_timer_interval;
 882         int64_t blocking_timeout;
 883
 884         assert(attr);
 885
 886         ret = lttng_channel_get_discarded_event_count(chan, &discarded_events);
 887         if (ret) {
 888                 goto end;
 889         }
 890
 891         ret = lttng_channel_get_lost_packet_count(chan, &lost_packets);
 892         if (ret) {
 893                 goto end;
 894         }
 895
 896         ret = lttng_channel_get_monitor_timer_interval(chan,
 897                         &monitor_timer_interval);
 898         if (ret) {
 899                 goto end;
 900         }
 901
 902         ret = lttng_channel_get_blocking_timeout(chan,
 903                         &blocking_timeout);
 904         if (ret) {
 905                 goto end;
 906         }
 907
 908         /* Opening Attributes */
 909         ret = mi_lttng_writer_open_element(writer, config_element_attributes);
 910         if (ret) {
 911                 goto end;
 912         }
 913
 914         /* Overwrite */
 915         ret = mi_lttng_writer_write_element_string(writer,
 916                 config_element_overwrite_mode,
 917                 attr->overwrite ? config_overwrite_mode_overwrite :
 918                         config_overwrite_mode_discard);
 919         if (ret) {
 920                 goto end;
 921         }
 922
 923         /* Sub buffer size in byte */
 924         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 925                 config_element_subbuf_size, attr->subbuf_size);
 926         if (ret) {
 927                 goto end;
 928         }
 929
 930         /* Number of subbuffer (power of two) */
 931         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 932                 config_element_num_subbuf,
 933                 attr->num_subbuf);
 934         if (ret) {
 935                 goto end;
 936         }
 937
 938         /* Switch timer interval in usec */
 939         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 940                 config_element_switch_timer_interval,
 941                 attr->switch_timer_interval);
 942         if (ret) {
 943                 goto end;
 944         }
 945
 946         /* Read timer interval in usec */
 947         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 948                 config_element_read_timer_interval,
 949                 attr->read_timer_interval);
 950         if (ret) {
 951                 goto end;
 952         }
 953
 954         /* Monitor timer interval in usec */
 955         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 956                 config_element_monitor_timer_interval,
 957                 monitor_timer_interval);
 958         if (ret) {
 959                 goto end;
 960         }
 961
 962         /* Retry timeout in usec */
 963         ret = mi_lttng_writer_write_element_signed_int(writer,
 964                 config_element_blocking_timeout,
 965                 blocking_timeout);
 966         if (ret) {
 967                 goto end;
 968         }
 969
 970         /* Event output */
 971         ret = mi_lttng_writer_write_element_string(writer,
 972                 config_element_output_type,
 973                 attr->output == LTTNG_EVENT_SPLICE ?
 974                 config_output_type_splice : config_output_type_mmap);
 975         if (ret) {
 976                 goto end;
 977         }
 978
 979         /* Tracefile size in bytes */
 980         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 981                 config_element_tracefile_size, attr->tracefile_size);
 982         if (ret) {
 983                 goto end;
 984         }
 985
 986         /* Count of tracefiles */
 987         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 988                 config_element_tracefile_count,
 989                 attr->tracefile_count);
 990         if (ret) {
 991                 goto end;
 992         }
 993
 994         /* Live timer interval in usec*/
 995         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 996                 config_element_live_timer_interval,
 997                 attr->live_timer_interval);
 998         if (ret) {
 999                 goto end;
1000         }
1001
1002         /* Discarded events */
1003         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1004                 config_element_discarded_events,
1005                 discarded_events);
1006         if (ret) {
1007                 goto end;
1008         }
1009
1010         /* Lost packets */
1011         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1012                 config_element_lost_packets,
1013                 lost_packets);
1014         if (ret) {
1015                 goto end;
1016         }
1017
1018         /* Closing attributes */
1019         ret = mi_lttng_writer_close_element(writer);
1020         if (ret) {
1021                 goto end;
1022         }
1023 end:
1024         return ret;
1025
1026 }
1027
1028 LTTNG_HIDDEN
1029 int mi_lttng_event_common_attributes(struct mi_writer *writer,
1030                 struct lttng_event *event)
1031 {
1032         int ret;
1033         const char *filter_expression;
1034
1035         /* Open event element */
1036         ret = mi_lttng_writer_open_element(writer, config_element_event);
1037         if (ret) {
1038                 goto end;
1039         }
1040
1041         /* Event name */
1042         ret = mi_lttng_writer_write_element_string(writer,
1043                         config_element_name, event->name);
1044         if (ret) {
1045                 goto end;
1046         }
1047
1048         /* Event type */
1049         ret = mi_lttng_writer_write_element_string(writer,
1050                         config_element_type, mi_lttng_eventtype_string(event->type));
1051         if (ret) {
1052                 goto end;
1053         }
1054
1055         /* Is event enabled */
1056         ret = mi_lttng_writer_write_element_bool(writer,
1057                         config_element_enabled, event->enabled);
1058         if (ret) {
1059                 goto end;
1060         }
1061
1062         /* Event filter expression */
1063         ret = lttng_event_get_filter_expression(event, &filter_expression);
1064         if (ret) {
1065                 goto end;
1066         }
1067
1068         if (filter_expression) {
1069                 ret = mi_lttng_writer_write_element_string(writer,
1070                                 config_element_filter_expression,
1071                                 filter_expression);
1072                 if (ret) {
1073                         goto end;
1074                 }
1075         }
1076
1077 end:
1078         return ret;
1079 }
1080
1081 static int write_event_exclusions(struct mi_writer *writer,
1082                 struct lttng_event *event)
1083 {
1084         int i;
1085         int ret;
1086         int exclusion_count;
1087
1088         /* Open event exclusions */
1089         ret = mi_lttng_writer_open_element(writer, config_element_exclusions);
1090         if (ret) {
1091                 goto end;
1092         }
1093
1094         exclusion_count = lttng_event_get_exclusion_name_count(event);
1095         if (exclusion_count < 0) {
1096                 ret = exclusion_count;
1097                 goto end;
1098         }
1099
1100         for (i = 0; i < exclusion_count; i++) {
1101                 const char *name;
1102
1103                 ret = lttng_event_get_exclusion_name(event, i, &name);
1104                 if (ret) {
1105                         /* Close exclusions */
1106                         mi_lttng_writer_close_element(writer);
1107                         goto end;
1108                 }
1109
1110                 ret = mi_lttng_writer_write_element_string(writer,
1111                                 config_element_exclusion, name);
1112                 if (ret) {
1113                         /* Close exclusions */
1114                         mi_lttng_writer_close_element(writer);
1115                         goto end;
1116                 }
1117         }
1118
1119         /* Close exclusions */
1120         ret = mi_lttng_writer_close_element(writer);
1121
1122 end:
1123         return ret;
1124 }
1125
1126 LTTNG_HIDDEN
1127 int mi_lttng_event_tracepoint_loglevel(struct mi_writer *writer,
1128                 struct lttng_event *event, enum lttng_domain_type domain)
1129 {
1130         int ret;
1131
1132         /* Event loglevel */
1133         ret = mi_lttng_writer_write_element_string(writer,
1134                         config_element_loglevel,
1135                         mi_lttng_loglevel_string(event->loglevel, domain));
1136         if (ret) {
1137                 goto end;
1138         }
1139
1140         /* Log level type */
1141         ret = mi_lttng_writer_write_element_string(writer,
1142                         config_element_loglevel_type,
1143                         mi_lttng_logleveltype_string(event->loglevel_type));
1144         if (ret) {
1145                 goto end;
1146         }
1147
1148         /* Event exclusions */
1149         ret = write_event_exclusions(writer, event);
1150
1151 end:
1152         return ret;
1153 }
1154
1155 LTTNG_HIDDEN
1156 int mi_lttng_event_tracepoint_no_loglevel(struct mi_writer *writer,
1157                 struct lttng_event *event)
1158 {
1159         /* event exclusion filter */
1160         return write_event_exclusions(writer, event);
1161 }
1162
1163 LTTNG_HIDDEN
1164 int mi_lttng_event_function_probe(struct mi_writer *writer,
1165                 struct lttng_event *event)
1166 {
1167         int ret;
1168
1169         ret = mi_lttng_writer_open_element(writer, config_element_attributes);
1170         if (ret) {
1171                 goto end;
1172         }
1173
1174         ret = mi_lttng_writer_open_element(writer, config_element_probe_attributes);
1175         if (ret) {
1176                 goto end;
1177         }
1178
1179         if (event->attr.probe.addr != 0) {
1180                 /* event probe address */
1181                 ret = mi_lttng_writer_write_element_unsigned_int(writer,
1182                                 config_element_address, event->attr.probe.addr);
1183                 if (ret) {
1184                         goto end;
1185                 }
1186         } else {
1187                 /* event probe offset */
1188                 ret = mi_lttng_writer_write_element_unsigned_int(writer,
1189                                 config_element_offset, event->attr.probe.offset);
1190                 if (ret) {
1191                         goto end;
1192                 }
1193
1194                 /* event probe symbol_name */
1195                 ret = mi_lttng_writer_write_element_string(writer,
1196                                 config_element_symbol_name, event->attr.probe.symbol_name);
1197                 if (ret) {
1198                         goto end;
1199                 }
1200         }
1201
1202         /* Close probe_attributes and attributes */
1203         ret = mi_lttng_close_multi_element(writer, 2);
1204 end:
1205         return ret;
1206 }
1207
1208 LTTNG_HIDDEN
1209 int mi_lttng_event_function_entry(struct mi_writer *writer,
1210                 struct lttng_event *event)
1211 {
1212         int ret;
1213
1214         ret = mi_lttng_writer_open_element(writer, config_element_attributes);
1215         if (ret) {
1216                 goto end;
1217         }
1218
1219         ret = mi_lttng_writer_open_element(writer, config_element_probe_attributes);
1220         if (ret) {
1221                 goto end;
1222         }
1223
1224         /* event probe symbol_name */
1225         ret = mi_lttng_writer_write_element_string(writer,
1226                         config_element_symbol_name, event->attr.ftrace.symbol_name);
1227         if (ret) {
1228                 goto end;
1229         }
1230
1231         /* Close function_attributes and attributes */
1232         ret = mi_lttng_close_multi_element(writer, 2);
1233 end:
1234         return ret;
1235 }
1236
1237 LTTNG_HIDDEN
1238 int mi_lttng_events_open(struct mi_writer *writer)
1239 {
1240         return mi_lttng_writer_open_element(writer, config_element_events);
1241 }
1242
1243 LTTNG_HIDDEN
1244 int mi_lttng_event(struct mi_writer *writer,
1245                 struct lttng_event *event, int is_open, enum lttng_domain_type domain)
1246 {
1247         int ret;
1248
1249         ret = mi_lttng_event_common_attributes(writer, event);
1250         if (ret) {
1251                 goto end;
1252         }
1253
1254         switch (event->type) {
1255         case LTTNG_EVENT_TRACEPOINT:
1256         {
1257                 if (event->loglevel != -1) {
1258                         ret = mi_lttng_event_tracepoint_loglevel(writer, event, domain);
1259                 } else {
1260                         ret = mi_lttng_event_tracepoint_no_loglevel(writer, event);
1261                 }
1262                 break;
1263         }
1264         case LTTNG_EVENT_FUNCTION:
1265                 /* Fallthrough */
1266         case LTTNG_EVENT_PROBE:
1267                 ret = mi_lttng_event_function_probe(writer, event);
1268                 break;
1269         case LTTNG_EVENT_FUNCTION_ENTRY:
1270                 ret = mi_lttng_event_function_entry(writer, event);
1271                 break;
1272         case LTTNG_EVENT_ALL:
1273                 /* Fallthrough */
1274         default:
1275                 break;
1276         }
1277
1278         if (!is_open) {
1279                 ret = mi_lttng_writer_close_element(writer);
1280         }
1281
1282 end:
1283         return ret;
1284 }
1285
1286 LTTNG_HIDDEN
1287 int mi_lttng_trackers_open(struct mi_writer *writer)
1288 {
1289         return mi_lttng_writer_open_element(writer, config_element_trackers);
1290 }
1291
1292 LTTNG_HIDDEN
1293 int mi_lttng_pid_tracker_open(struct mi_writer *writer)
1294 {
1295         int ret;
1296
1297         /* Open element pid_tracker */
1298         ret = mi_lttng_writer_open_element(writer, config_element_pid_tracker);
1299         if (ret) {
1300                 goto end;
1301         }
1302
1303         /* Open targets element */
1304         ret = mi_lttng_targets_open(writer);
1305 end:
1306         return ret;
1307 }
1308
1309 LTTNG_HIDDEN
1310 int mi_lttng_pids_open(struct mi_writer *writer)
1311 {
1312         return mi_lttng_writer_open_element(writer, config_element_pids);
1313 }
1314
1315 /*
1316  * TODO: move the listing of pid for user agent to process semantic on
1317  * mi api bump. The use of process element break the mi api.
1318  */
1319 LTTNG_HIDDEN
1320 int mi_lttng_pid(struct mi_writer *writer, pid_t pid , const char *name,
1321                 int is_open)
1322 {
1323         int ret;
1324
1325         /* Open pid process */
1326         ret = mi_lttng_writer_open_element(writer, config_element_pid);
1327         if (ret) {
1328                 goto end;
1329         }
1330
1331         /* Writing pid number */
1332         ret = mi_lttng_writer_write_element_signed_int(writer,
1333                         mi_lttng_element_pid_id, (int)pid);
1334         if (ret) {
1335                 goto end;
1336         }
1337
1338         /* Writing name of the process */
1339         if (name) {
1340                 ret = mi_lttng_writer_write_element_string(writer, config_element_name,
1341                                 name);
1342                 if (ret) {
1343                         goto end;
1344                 }
1345         }
1346
1347         if (!is_open) {
1348                 /* Closing Pid */
1349                 ret = mi_lttng_writer_close_element(writer);
1350         }
1351
1352 end:
1353         return ret;
1354 }
1355
1356 LTTNG_HIDDEN
1357 int mi_lttng_targets_open(struct mi_writer *writer)
1358 {
1359         return mi_lttng_writer_open_element(writer,
1360                         config_element_targets);
1361 }
1362
1363 LTTNG_HIDDEN
1364 int mi_lttng_pid_target(struct mi_writer *writer, pid_t pid, int is_open)
1365 {
1366         int ret;
1367
1368         ret = mi_lttng_writer_open_element(writer,
1369                         config_element_target_pid);
1370         if (ret) {
1371                 goto end;
1372         }
1373
1374         /* Writing pid number
1375          * Special case for element all on track untrack command
1376          * All pid is represented as wildcard *
1377          */
1378         if ((int) pid == -1) {
1379                 ret = mi_lttng_writer_write_element_string(writer,
1380                                 config_element_pid,
1381                                 mi_lttng_element_track_untrack_all_wildcard);
1382         } else {
1383                 ret = mi_lttng_writer_write_element_signed_int(writer,
1384                                 config_element_pid, (int) pid);
1385         }
1386         if (ret) {
1387                 goto end;
1388         }
1389
1390         if (!is_open) {
1391                 ret = mi_lttng_writer_close_element(writer);
1392                 if (ret) {
1393                         goto end;
1394                 }
1395         }
1396
1397 end:
1398         return ret;
1399 }
1400
1401 LTTNG_HIDDEN
1402 int mi_lttng_event_fields_open(struct mi_writer *writer)
1403 {
1404         return mi_lttng_writer_open_element(writer, mi_lttng_element_event_fields);
1405 }
1406
1407 LTTNG_HIDDEN
1408 int mi_lttng_event_field(struct mi_writer *writer,
1409                 struct lttng_event_field *field)
1410 {
1411         int ret;
1412
1413         if (!field->field_name[0]) {
1414                 ret = 0;
1415                 goto end;
1416         }
1417
1418         /* Open field */
1419         ret = mi_lttng_writer_open_element(writer, mi_lttng_element_event_field);
1420         if (ret) {
1421                 goto end;
1422         }
1423
1424         if (!field->field_name[0]) {
1425                 goto close;
1426         }
1427
1428         /* Name */
1429         ret = mi_lttng_writer_write_element_string(writer, config_element_name,
1430                         field->field_name);
1431         if (ret) {
1432                 goto end;
1433         }
1434
1435         /* Type */
1436         ret = mi_lttng_writer_write_element_string(writer, config_element_type,
1437                         mi_lttng_eventfieldtype_string(field->type));
1438         if (ret) {
1439                 goto end;
1440         }
1441
1442         /* nowrite  */
1443         ret = mi_lttng_writer_write_element_signed_int(writer,
1444                         mi_lttng_element_nowrite, field->nowrite);
1445         if (ret) {
1446                 goto end;
1447         }
1448
1449 close:
1450         /* Close field element */
1451         ret = mi_lttng_writer_close_element(writer);
1452
1453 end:
1454         return ret;
1455 }
1456
1457 LTTNG_HIDDEN
1458 int mi_lttng_perf_counter_context(struct mi_writer *writer,
1459                 struct lttng_event_perf_counter_ctx  *perf_context)
1460 {
1461         int ret;
1462
1463         /* Open perf_counter_context */
1464         ret = mi_lttng_writer_open_element(writer,
1465                         mi_lttng_element_perf_counter_context);
1466         if (ret) {
1467                 goto end;
1468         }
1469
1470         /* Type */
1471         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1472                         config_element_type, perf_context->type);
1473         if (ret) {
1474                 goto end;
1475         }
1476
1477         /* Config */
1478         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1479                         config_element_config, perf_context->config);
1480         if (ret) {
1481                 goto end;
1482         }
1483
1484         /* Name of the perf counter */
1485         ret = mi_lttng_writer_write_element_string(writer,
1486                         config_element_name, perf_context->name);
1487         if (ret) {
1488                 goto end;
1489         }
1490
1491         /* Close perf_counter_context */
1492         ret = mi_lttng_writer_close_element(writer);
1493 end:
1494         return ret;
1495 }
1496
1497 static
1498 int mi_lttng_app_context(struct mi_writer *writer,
1499                 const char *provider_name, const char *ctx_name)
1500 {
1501         int ret;
1502
1503         /* Open app */
1504         ret = mi_lttng_writer_open_element(writer,
1505                         config_element_context_app);
1506         if (ret) {
1507                 goto end;
1508         }
1509
1510         /* provider_name */
1511         ret = mi_lttng_writer_write_element_string(writer,
1512                         config_element_context_app_provider_name,
1513                         provider_name);
1514         if (ret) {
1515                 goto end;
1516         }
1517
1518         /* ctx_name */
1519         ret = mi_lttng_writer_write_element_string(writer,
1520                         config_element_context_app_ctx_name, ctx_name);
1521         if (ret) {
1522                 goto end;
1523         }
1524
1525         /* Close app */
1526         ret = mi_lttng_writer_close_element(writer);
1527 end:
1528         return ret;
1529 }
1530
1531 LTTNG_HIDDEN
1532 int mi_lttng_context(struct mi_writer *writer,
1533                 struct lttng_event_context *context, int is_open)
1534 {
1535         int ret;
1536
1537         /* Open context */
1538         ret = mi_lttng_writer_open_element(writer , config_element_context);
1539         if (ret) {
1540                 goto end;
1541         }
1542
1543         /* Special case for PERF_*_COUNTER
1544          * print the lttng_event_perf_counter_ctx*/
1545         switch (context->ctx) {
1546         case LTTNG_EVENT_CONTEXT_PERF_COUNTER:
1547         case LTTNG_EVENT_CONTEXT_PERF_THREAD_COUNTER:
1548         case LTTNG_EVENT_CONTEXT_PERF_CPU_COUNTER:
1549         {
1550                 struct lttng_event_perf_counter_ctx *perf_context =
1551                                 &context->u.perf_counter;
1552                 ret =  mi_lttng_perf_counter_context(writer, perf_context);
1553                 if (ret) {
1554                         goto end;
1555                 }
1556                 break;
1557         }
1558         case LTTNG_EVENT_CONTEXT_APP_CONTEXT:
1559         {
1560                 ret = mi_lttng_app_context(writer,
1561                                 context->u.app_ctx.provider_name,
1562                                 context->u.app_ctx.ctx_name);
1563                 if (ret) {
1564                         goto end;
1565                 }
1566                 break;
1567         }
1568         default:
1569         {
1570                 const char *type_string = mi_lttng_event_contexttype_string(
1571                                 context->ctx);
1572                 if (!type_string) {
1573                         ret = -LTTNG_ERR_INVALID;
1574                         goto end;
1575                 }
1576
1577                 /* Print context type */
1578                 ret = mi_lttng_writer_write_element_string(writer,
1579                                 config_element_type, type_string);
1580                 break;
1581         }
1582         }
1583
1584         /* Close context */
1585         if (!is_open) {
1586                 ret = mi_lttng_writer_close_element(writer);
1587         }
1588
1589 end:
1590         return ret;
1591 }
1592
1593 LTTNG_HIDDEN
1594 int mi_lttng_snapshot_output_session_name(struct mi_writer *writer,
1595                 const char *session_name)
1596 {
1597         int ret;
1598
1599         /* Open session element */
1600         ret = mi_lttng_writer_open_element(writer, config_element_session);
1601         if (ret) {
1602                 goto end;
1603         }
1604
1605         /* Snapshot output list for current session name */
1606         ret = mi_lttng_writer_write_element_string(writer, config_element_name,
1607                         session_name);
1608         if (ret) {
1609                 goto end;
1610         }
1611
1612         /* Open element snapshots (sequence one snapshot) */
1613         ret = mi_lttng_writer_open_element(writer, mi_lttng_element_snapshots);
1614         if (ret) {
1615                 goto end;
1616         }
1617
1618 end:
1619         return ret;
1620 }
1621
1622 LTTNG_HIDDEN
1623 int mi_lttng_snapshot_list_output(struct mi_writer *writer,
1624                 struct lttng_snapshot_output *output)
1625 {
1626         int ret;
1627
1628         /* Open element snapshot output */
1629         ret = mi_lttng_writer_open_element(writer,
1630                         mi_lttng_element_command_snapshot);
1631         if (ret) {
1632                 goto end;
1633         }
1634
1635         /* ID of the snapshot output */
1636         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1637                         mi_lttng_element_id, output->id);
1638         if (ret) {
1639                 goto end;
1640         }
1641
1642         /* Name of the output */
1643         ret = mi_lttng_writer_write_element_string(writer, config_element_name,
1644                         output->name);
1645         if (ret) {
1646                 goto end;
1647         }
1648
1649         /* Destination of the output (ctrl_url)*/
1650         ret = mi_lttng_writer_write_element_string(writer,
1651                         mi_lttng_element_snapshot_ctrl_url, output->ctrl_url);
1652         if (ret) {
1653                 goto end;
1654         }
1655
1656         /* Destination of the output (data_url) */
1657         ret = mi_lttng_writer_write_element_string(writer,
1658                         mi_lttng_element_snapshot_data_url, output->data_url);
1659         if (ret) {
1660                 goto end;
1661         }
1662
1663         /* total size of all stream combined */
1664         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1665                         mi_lttng_element_snapshot_max_size, output->max_size);
1666         if (ret) {
1667                 goto end;
1668         }
1669
1670         /* Close snapshot output element */
1671         ret = mi_lttng_writer_close_element(writer);
1672
1673 end:
1674         return ret;
1675 }
1676
1677 LTTNG_HIDDEN
1678 int mi_lttng_snapshot_del_output(struct mi_writer *writer, int id,
1679                 const char *name, const char *current_session_name)
1680 {
1681         int ret;
1682
1683         /* Open element del_snapshot */
1684         ret = mi_lttng_writer_open_element(writer,
1685                         mi_lttng_element_command_snapshot);
1686         if (ret) {
1687                 goto end;
1688         }
1689
1690
1691         if (id != UINT32_MAX) {
1692                 /* "Snapshot output "id" successfully deleted
1693                  * for "current_session_name"
1694                  * ID of the snapshot output
1695                  */
1696                 ret = mi_lttng_writer_write_element_unsigned_int(writer,
1697                                 mi_lttng_element_id, id);
1698                 if (ret) {
1699                         goto end;
1700                 }
1701         } else {
1702                 /* "Snapshot output "name" successfully deleted
1703                  * for session "current_session_name"
1704                  * Name of the output
1705                  */
1706                 ret = mi_lttng_writer_write_element_string(writer, config_element_name,
1707                                 name);
1708                 if (ret) {
1709                         goto end;
1710                 }
1711         }
1712
1713         /* Snapshot was deleted for session "current_session_name"*/
1714         ret = mi_lttng_writer_write_element_string(writer,
1715                         mi_lttng_element_snapshot_session_name,
1716                         current_session_name);
1717         if (ret) {
1718                 goto end;
1719         }
1720
1721         /* Close snapshot element */
1722         ret = mi_lttng_writer_close_element(writer);
1723
1724 end:
1725         return ret;
1726 }
1727
1728 LTTNG_HIDDEN
1729 int mi_lttng_snapshot_add_output(struct mi_writer *writer,
1730                 const char *current_session_name, const char *n_ptr,
1731                 struct lttng_snapshot_output *output)
1732 {
1733         int ret;
1734
1735         /* Open element snapshot */
1736         ret = mi_lttng_writer_open_element(writer,
1737                         mi_lttng_element_command_snapshot);
1738         if (ret) {
1739                 goto end;
1740         }
1741
1742         /* Snapshot output id */
1743         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1744                         mi_lttng_element_id, output->id);
1745         if (ret) {
1746                 goto end;
1747         }
1748
1749         /* Snapshot output names */
1750         ret = mi_lttng_writer_write_element_string(writer,
1751                         config_element_name, n_ptr);
1752         if (ret) {
1753                 goto end;
1754         }
1755
1756         /* Destination of the output (ctrl_url)*/
1757         ret = mi_lttng_writer_write_element_string(writer,
1758                         mi_lttng_element_snapshot_ctrl_url, output->ctrl_url);
1759         if (ret) {
1760                 goto end;
1761         }
1762
1763         /* Snapshot added for session "current_session_name"*/
1764         ret = mi_lttng_writer_write_element_string(writer,
1765                         mi_lttng_element_snapshot_session_name, current_session_name);
1766         if (ret) {
1767                 goto end;
1768         }
1769
1770         /* total size of all stream combined */
1771         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1772                         mi_lttng_element_snapshot_max_size, output->max_size);
1773         if (ret) {
1774                 goto end;
1775         }
1776
1777         /* Close snapshot element */
1778         ret = mi_lttng_writer_close_element(writer);
1779
1780 end:
1781         return ret;
1782 }
1783
1784 LTTNG_HIDDEN
1785 int mi_lttng_snapshot_record(struct mi_writer *writer,
1786                 const char *current_session_name, const char *url,
1787                 const char *cmdline_ctrl_url, const char *cmdline_data_url)
1788 {
1789         int ret;
1790
1791         /* Open element snapshot */
1792         ret = mi_lttng_writer_open_element(writer,
1793                         mi_lttng_element_command_snapshot);
1794         if (ret) {
1795                 goto end;
1796         }
1797
1798         /*
1799          * If a valid an URL was given, serialize it,
1800          * else take the command line data and ctrl urls*/
1801         if (url) {
1802                 /* Destination of the output (ctrl_url)*/
1803                 ret = mi_lttng_writer_write_element_string(writer,
1804                                 mi_lttng_element_snapshot_ctrl_url, url);
1805                 if (ret) {
1806                         goto end;
1807                 }
1808         } else if (cmdline_ctrl_url) {
1809                 /* Destination of the output (ctrl_url)*/
1810                 ret = mi_lttng_writer_write_element_string(writer,
1811                                 mi_lttng_element_snapshot_ctrl_url, cmdline_ctrl_url);
1812                 if (ret) {
1813                         goto end;
1814                 }
1815
1816                 /* Destination of the output (data_url) */
1817                 ret = mi_lttng_writer_write_element_string(writer,
1818                                 mi_lttng_element_snapshot_data_url, cmdline_data_url);
1819                 if (ret) {
1820                         goto end;
1821                 }
1822         }
1823
1824         /* Close record_snapshot element */
1825         ret = mi_lttng_writer_close_element(writer);
1826
1827 end:
1828         return ret;
1829 }