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_calibrate = "calibrate";
  51 const char * const mi_lttng_element_command_create = "create";
  52 const char * const mi_lttng_element_command_destroy = "destroy";
  53 const char * const mi_lttng_element_command_disable_channel = "disable-channel";
  54 const char * const mi_lttng_element_command_disable_event = "disable-event";
  55 const char * const mi_lttng_element_command_enable_channels = "enable-channel";
  56 const char * const mi_lttng_element_command_enable_event = "enable-event";
  57 const char * const mi_lttng_element_command_list = "list";
  58 const char * const mi_lttng_element_command_load = "load";
  59 LTTNG_HIDDEN const char * const mi_lttng_element_command_metadata = "metadata";
  60 LTTNG_HIDDEN const char * const mi_lttng_element_command_metadata_action = "metadata_action";
  61 LTTNG_HIDDEN const char * const mi_lttng_element_command_regenerate = "regenerate";
  62 LTTNG_HIDDEN const char * const mi_lttng_element_command_regenerate_action = "regenerate_action";
  63 const char * const mi_lttng_element_command_name = "name";
  64 const char * const mi_lttng_element_command_output = "output";
  65 const char * const mi_lttng_element_command_save = "save";
  66 const char * const mi_lttng_element_command_set_session = "set-session";
  67 const char * const mi_lttng_element_command_snapshot = "snapshot";
  68 const char * const mi_lttng_element_command_snapshot_add = "add_snapshot";
  69 const char * const mi_lttng_element_command_snapshot_del = "del_snapshot";
  70 const char * const mi_lttng_element_command_snapshot_list = "list_snapshot";
  71 const char * const mi_lttng_element_command_snapshot_record = "record_snapshot";
  72 const char * const mi_lttng_element_command_start = "start";
  73 const char * const mi_lttng_element_command_stop = "stop";
  74 const char * const mi_lttng_element_command_success = "success";
  75 const char * const mi_lttng_element_command_track = "track";
  76 const char * const mi_lttng_element_command_untrack = "untrack";
  77 const char * const mi_lttng_element_command_version = "version";
  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
 106 /* General elements of mi_lttng */
 107 const char * const mi_lttng_element_empty = "";
 108 const char * const mi_lttng_element_id = "id";
 109 const char * const mi_lttng_element_nowrite = "nowrite";
 110 const char * const mi_lttng_element_success = "success";
 111 const char * const mi_lttng_element_type_enum = "ENUM";
 112 const char * const mi_lttng_element_type_float = "FLOAT";
 113 const char * const mi_lttng_element_type_integer = "INTEGER";
 114 const char * const mi_lttng_element_type_other = "OTHER";
 115 const char * const mi_lttng_element_type_string = "STRING";
 116
 117 /* String related to loglevel */
 118 const char * const mi_lttng_loglevel_str_alert = "TRACE_ALERT";
 119 const char * const mi_lttng_loglevel_str_crit = "TRACE_CRIT";
 120 const char * const mi_lttng_loglevel_str_debug = "TRACE_DEBUG";
 121 const char * const mi_lttng_loglevel_str_debug_function = "TRACE_DEBUG_FUNCTION";
 122 const char * const mi_lttng_loglevel_str_debug_line = "TRACE_DEBUG_LINE";
 123 const char * const mi_lttng_loglevel_str_debug_module = "TRACE_DEBUG_MODULE";
 124 const char * const mi_lttng_loglevel_str_debug_process = "TRACE_DEBUG_PROCESS";
 125 const char * const mi_lttng_loglevel_str_debug_program = "TRACE_DEBUG_PROGRAM";
 126 const char * const mi_lttng_loglevel_str_debug_system = "TRACE_DEBUG_SYSTEM";
 127 const char * const mi_lttng_loglevel_str_debug_unit = "TRACE_DEBUG_UNIT";
 128 const char * const mi_lttng_loglevel_str_emerg = "TRACE_EMERG";
 129 const char * const mi_lttng_loglevel_str_err = "TRACE_ERR";
 130 const char * const mi_lttng_loglevel_str_info = "TRACE_INFO";
 131 const char * const mi_lttng_loglevel_str_notice = "TRACE_NOTICE";
 132 const char * const mi_lttng_loglevel_str_unknown = "UNKNOWN";
 133 const char * const mi_lttng_loglevel_str_warning = "TRACE_WARNING";
 134
 135 /* String related to loglevel JUL */
 136 const char * const mi_lttng_loglevel_str_jul_all = "JUL_ALL";
 137 const char * const mi_lttng_loglevel_str_jul_config = "JUL_CONFIG";
 138 const char * const mi_lttng_loglevel_str_jul_fine = "JUL_FINE";
 139 const char * const mi_lttng_loglevel_str_jul_finer = "JUL_FINER";
 140 const char * const mi_lttng_loglevel_str_jul_finest = "JUL_FINEST";
 141 const char * const mi_lttng_loglevel_str_jul_info = "JUL_INFO";
 142 const char * const mi_lttng_loglevel_str_jul_off = "JUL_OFF";
 143 const char * const mi_lttng_loglevel_str_jul_severe = "JUL_SEVERE";
 144 const char * const mi_lttng_loglevel_str_jul_warning = "JUL_WARNING";
 145
 146 /* String related to loglevel LOG4J */
 147 const char * const mi_lttng_loglevel_str_log4j_off = "LOG4J_OFF";
 148 const char * const mi_lttng_loglevel_str_log4j_fatal = "LOG4J_FATAL";
 149 const char * const mi_lttng_loglevel_str_log4j_error = "LOG4J_ERROR";
 150 const char * const mi_lttng_loglevel_str_log4j_warn = "LOG4J_WARN";
 151 const char * const mi_lttng_loglevel_str_log4j_info = "LOG4J_INFO";
 152 const char * const mi_lttng_loglevel_str_log4j_debug = "LOG4J_DEBUG";
 153 const char * const mi_lttng_loglevel_str_log4j_trace = "LOG4J_TRACE";
 154 const char * const mi_lttng_loglevel_str_log4j_all = "LOG4J_ALL";
 155
 156 /* String related to loglevel Python */
 157 const char * const mi_lttng_loglevel_str_python_critical = "PYTHON_CRITICAL";
 158 const char * const mi_lttng_loglevel_str_python_error = "PYTHON_ERROR";
 159 const char * const mi_lttng_loglevel_str_python_warning = "PYTHON_WARNING";
 160 const char * const mi_lttng_loglevel_str_python_info = "PYTHON_INFO";
 161 const char * const mi_lttng_loglevel_str_python_debug = "PYTHON_DEBUG";
 162 const char * const mi_lttng_loglevel_str_python_notset = "PYTHON_NOTSET";
 163
 164 /* String related to loglevel type */
 165 const char * const mi_lttng_loglevel_type_all = "ALL";
 166 const char * const mi_lttng_loglevel_type_range = "RANGE";
 167 const char * const mi_lttng_loglevel_type_single = "SINGLE";
 168 const char * const mi_lttng_loglevel_type_unknown = "UNKNOWN";
 169
 170 /* String related to lttng_calibrate */
 171 const char * const mi_lttng_element_calibrate = "calibrate";
 172 const char * const mi_lttng_element_calibrate_function = "FUNCTION";
 173
 174 /* String related to a lttng_snapshot_output */
 175 const char * const mi_lttng_element_snapshot_ctrl_url = "ctrl_url";
 176 const char * const mi_lttng_element_snapshot_data_url = "data_url";
 177 const char * const mi_lttng_element_snapshot_max_size = "max_size";
 178 const char * const mi_lttng_element_snapshot_n_ptr = "n_ptr";
 179 const char * const mi_lttng_element_snapshot_session_name = "session_name";
 180 const char * const mi_lttng_element_snapshots = "snapshots";
 181
 182 /* String related to track/untrack command */
 183 const char * const mi_lttng_element_track_untrack_all_wildcard = "*";
 184
 185 /* Deprecated symbols preserved for ABI compatibility. */
 186 const char * const mi_lttng_context_type_perf_counter;
 187 const char * const mi_lttng_context_type_perf_cpu_counter;
 188 const char * const mi_lttng_context_type_perf_thread_counter;
 189 const char * const mi_lttng_element_track_untrack_pid_target;
 190 const char * const mi_lttng_element_track_untrack_targets;
 191
 192 /* This is a merge of jul loglevel and regular loglevel
 193  * Those should never overlap by definition
 194  * (see struct lttng_event loglevel)
 195  */
 196 LTTNG_HIDDEN
 197 const char *mi_lttng_loglevel_string(int value, enum lttng_domain_type domain)
 198 {
 199         switch (domain) {
 200         case LTTNG_DOMAIN_KERNEL:
 201         case LTTNG_DOMAIN_UST:
 202                 switch (value) {
 203                 case -1:
 204                         return mi_lttng_element_empty;
 205                 case LTTNG_LOGLEVEL_EMERG:
 206                         return mi_lttng_loglevel_str_emerg;
 207                 case LTTNG_LOGLEVEL_ALERT:
 208                         return mi_lttng_loglevel_str_alert;
 209                 case LTTNG_LOGLEVEL_CRIT:
 210                         return mi_lttng_loglevel_str_crit;
 211                 case LTTNG_LOGLEVEL_ERR:
 212                         return mi_lttng_loglevel_str_err;
 213                 case LTTNG_LOGLEVEL_WARNING:
 214                         return mi_lttng_loglevel_str_warning;
 215                 case LTTNG_LOGLEVEL_NOTICE:
 216                         return mi_lttng_loglevel_str_notice;
 217                 case LTTNG_LOGLEVEL_INFO:
 218                         return mi_lttng_loglevel_str_info;
 219                 case LTTNG_LOGLEVEL_DEBUG_SYSTEM:
 220                         return mi_lttng_loglevel_str_debug_system;
 221                 case LTTNG_LOGLEVEL_DEBUG_PROGRAM:
 222                         return mi_lttng_loglevel_str_debug_program;
 223                 case LTTNG_LOGLEVEL_DEBUG_PROCESS:
 224                         return mi_lttng_loglevel_str_debug_process;
 225                 case LTTNG_LOGLEVEL_DEBUG_MODULE:
 226                         return mi_lttng_loglevel_str_debug_module;
 227                 case LTTNG_LOGLEVEL_DEBUG_UNIT:
 228                         return mi_lttng_loglevel_str_debug_unit;
 229                 case LTTNG_LOGLEVEL_DEBUG_FUNCTION:
 230                         return mi_lttng_loglevel_str_debug_function;
 231                 case LTTNG_LOGLEVEL_DEBUG_LINE:
 232                         return mi_lttng_loglevel_str_debug_line;
 233                 case LTTNG_LOGLEVEL_DEBUG:
 234                         return mi_lttng_loglevel_str_debug;
 235                 default:
 236                         return mi_lttng_loglevel_str_unknown;
 237                 }
 238                 break;
 239         case LTTNG_DOMAIN_LOG4J:
 240                 switch (value) {
 241                 case -1:
 242                         return mi_lttng_element_empty;
 243                 case LTTNG_LOGLEVEL_LOG4J_OFF:
 244                         return mi_lttng_loglevel_str_log4j_off;
 245                 case LTTNG_LOGLEVEL_LOG4J_FATAL:
 246                         return mi_lttng_loglevel_str_log4j_fatal;
 247                 case LTTNG_LOGLEVEL_LOG4J_ERROR:
 248                         return mi_lttng_loglevel_str_log4j_error;
 249                 case LTTNG_LOGLEVEL_LOG4J_WARN:
 250                         return mi_lttng_loglevel_str_log4j_warn;
 251                 case LTTNG_LOGLEVEL_LOG4J_INFO:
 252                         return mi_lttng_loglevel_str_log4j_info;
 253                 case LTTNG_LOGLEVEL_LOG4J_DEBUG:
 254                         return mi_lttng_loglevel_str_log4j_debug;
 255                 case LTTNG_LOGLEVEL_LOG4J_TRACE:
 256                         return mi_lttng_loglevel_str_log4j_trace;
 257                 case LTTNG_LOGLEVEL_LOG4J_ALL:
 258                         return mi_lttng_loglevel_str_log4j_all;
 259                 default:
 260                         return mi_lttng_loglevel_str_unknown;
 261                 }
 262                 break;
 263         case LTTNG_DOMAIN_JUL:
 264                 switch (value) {
 265                 case -1:
 266                         return mi_lttng_element_empty;
 267                 case LTTNG_LOGLEVEL_JUL_OFF:
 268                         return mi_lttng_loglevel_str_jul_off;
 269                 case LTTNG_LOGLEVEL_JUL_SEVERE:
 270                         return mi_lttng_loglevel_str_jul_severe;
 271                 case LTTNG_LOGLEVEL_JUL_WARNING:
 272                         return mi_lttng_loglevel_str_jul_warning;
 273                 case LTTNG_LOGLEVEL_JUL_INFO:
 274                         return mi_lttng_loglevel_str_jul_info;
 275                 case LTTNG_LOGLEVEL_JUL_CONFIG:
 276                         return mi_lttng_loglevel_str_jul_config;
 277                 case LTTNG_LOGLEVEL_JUL_FINE:
 278                         return mi_lttng_loglevel_str_jul_fine;
 279                 case LTTNG_LOGLEVEL_JUL_FINER:
 280                         return mi_lttng_loglevel_str_jul_finer;
 281                 case LTTNG_LOGLEVEL_JUL_FINEST:
 282                         return mi_lttng_loglevel_str_jul_finest;
 283                 case LTTNG_LOGLEVEL_JUL_ALL:
 284                         return mi_lttng_loglevel_str_jul_all;
 285                 default:
 286                         return mi_lttng_loglevel_str_unknown;
 287                 }
 288                 break;
 289         case LTTNG_DOMAIN_PYTHON:
 290                 switch (value) {
 291                 case LTTNG_LOGLEVEL_PYTHON_CRITICAL:
 292                         return mi_lttng_loglevel_str_python_critical;
 293                 case LTTNG_LOGLEVEL_PYTHON_ERROR:
 294                         return mi_lttng_loglevel_str_python_error;
 295                 case LTTNG_LOGLEVEL_PYTHON_WARNING:
 296                         return mi_lttng_loglevel_str_python_warning;
 297                 case LTTNG_LOGLEVEL_PYTHON_INFO:
 298                         return mi_lttng_loglevel_str_python_info;
 299                 case LTTNG_LOGLEVEL_PYTHON_DEBUG:
 300                         return mi_lttng_loglevel_str_python_debug;
 301                 case LTTNG_LOGLEVEL_PYTHON_NOTSET:
 302                         return mi_lttng_loglevel_str_python_notset;
 303                 default:
 304                         return mi_lttng_loglevel_str_unknown;
 305                 }
 306                 break;
 307         default:
 308                 return mi_lttng_loglevel_str_unknown;
 309         }
 310 }
 311
 312 LTTNG_HIDDEN
 313 const char *mi_lttng_logleveltype_string(enum lttng_loglevel_type value)
 314 {
 315         switch (value) {
 316         case LTTNG_EVENT_LOGLEVEL_ALL:
 317                 return mi_lttng_loglevel_type_all;
 318         case LTTNG_EVENT_LOGLEVEL_RANGE:
 319                 return mi_lttng_loglevel_type_range;
 320         case LTTNG_EVENT_LOGLEVEL_SINGLE:
 321                 return mi_lttng_loglevel_type_single;
 322         default:
 323                 return mi_lttng_loglevel_type_unknown;
 324         }
 325 }
 326
 327 LTTNG_HIDDEN
 328 const char *mi_lttng_eventtype_string(enum lttng_event_type value)
 329 {
 330         switch (value) {
 331         case LTTNG_EVENT_ALL:
 332                 return config_event_type_all;
 333         case LTTNG_EVENT_TRACEPOINT:
 334                 return config_event_type_tracepoint;
 335         case LTTNG_EVENT_PROBE:
 336                 return config_event_type_probe;
 337         case LTTNG_EVENT_FUNCTION:
 338                 return config_event_type_function;
 339         case LTTNG_EVENT_FUNCTION_ENTRY:
 340                 return config_event_type_function_entry;
 341         case LTTNG_EVENT_SYSCALL:
 342                 return config_event_type_syscall;
 343         case LTTNG_EVENT_NOOP:
 344                 return config_event_type_noop;
 345         default:
 346                 return mi_lttng_element_empty;
 347         }
 348 }
 349
 350 static
 351 const char *mi_lttng_event_contexttype_string(enum lttng_event_context_type val)
 352 {
 353         switch (val) {
 354         case LTTNG_EVENT_CONTEXT_PID:
 355                 return config_event_context_pid;
 356         case LTTNG_EVENT_CONTEXT_PROCNAME:
 357                 return config_event_context_procname;
 358         case LTTNG_EVENT_CONTEXT_PRIO:
 359                 return config_event_context_prio;
 360         case LTTNG_EVENT_CONTEXT_NICE:
 361                 return config_event_context_nice;
 362         case LTTNG_EVENT_CONTEXT_VPID:
 363                 return config_event_context_vpid;
 364         case LTTNG_EVENT_CONTEXT_TID:
 365                 return config_event_context_tid;
 366         case LTTNG_EVENT_CONTEXT_VTID:
 367                 return config_event_context_vtid;
 368         case LTTNG_EVENT_CONTEXT_PPID:
 369                 return config_event_context_ppid;
 370         case LTTNG_EVENT_CONTEXT_VPPID:
 371                 return config_event_context_vppid;
 372         case LTTNG_EVENT_CONTEXT_PTHREAD_ID:
 373                 return config_event_context_pthread_id;
 374         case LTTNG_EVENT_CONTEXT_HOSTNAME:
 375                 return config_event_context_hostname;
 376         case LTTNG_EVENT_CONTEXT_IP:
 377                 return config_event_context_ip;
 378         default:
 379                 return NULL;
 380         }
 381 }
 382
 383 LTTNG_HIDDEN
 384 const char *mi_lttng_eventfieldtype_string(enum lttng_event_field_type val)
 385 {
 386         switch (val) {
 387         case(LTTNG_EVENT_FIELD_INTEGER):
 388                 return mi_lttng_element_type_integer;
 389         case(LTTNG_EVENT_FIELD_ENUM):
 390                 return mi_lttng_element_type_enum;
 391         case(LTTNG_EVENT_FIELD_FLOAT):
 392                 return mi_lttng_element_type_float;
 393         case(LTTNG_EVENT_FIELD_STRING):
 394                 return mi_lttng_element_type_string;
 395         default:
 396                 return mi_lttng_element_type_other;
 397         }
 398 }
 399
 400 LTTNG_HIDDEN
 401 const char *mi_lttng_domaintype_string(enum lttng_domain_type value)
 402 {
 403         /* Note: This is a *duplicate* of get_domain_str from bin/lttng/utils.c */
 404         switch (value) {
 405         case LTTNG_DOMAIN_KERNEL:
 406                 return config_domain_type_kernel;
 407         case LTTNG_DOMAIN_UST:
 408                 return config_domain_type_ust;
 409         case LTTNG_DOMAIN_JUL:
 410                 return config_domain_type_jul;
 411         case LTTNG_DOMAIN_LOG4J:
 412                 return config_domain_type_log4j;
 413         case LTTNG_DOMAIN_PYTHON:
 414                 return config_domain_type_python;
 415         default:
 416                 /* Should not have an unknown domain */
 417                 assert(0);
 418                 return NULL;
 419         }
 420 }
 421
 422 LTTNG_HIDDEN
 423 const char *mi_lttng_buffertype_string(enum lttng_buffer_type value)
 424 {
 425         switch (value) {
 426         case LTTNG_BUFFER_PER_PID:
 427                 return config_buffer_type_per_pid;
 428         case LTTNG_BUFFER_PER_UID:
 429                 return config_buffer_type_per_uid;
 430         case LTTNG_BUFFER_GLOBAL:
 431                 return config_buffer_type_global;
 432         default:
 433                 /* Should not have an unknow buffer type */
 434                 assert(0);
 435                 return NULL;
 436         }
 437 }
 438
 439 LTTNG_HIDDEN
 440 const char *mi_lttng_calibratetype_string(enum lttng_calibrate_type val)
 441 {
 442         const char *ret;
 443
 444         switch (val) {
 445         case LTTNG_CALIBRATE_FUNCTION:
 446                 ret = mi_lttng_element_calibrate_function;
 447                 break;
 448         default:
 449                 ret = mi_lttng_element_empty;
 450                 break;
 451         }
 452         return ret;
 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;
 882
 883         assert(attr);
 884
 885         ret = lttng_channel_get_discarded_event_count(chan, &discarded_events);
 886         if (ret) {
 887                 goto end;
 888         }
 889
 890         ret = lttng_channel_get_lost_packet_count(chan, &lost_packets);
 891         if (ret) {
 892                 goto end;
 893         }
 894
 895         /* Opening Attributes */
 896         ret = mi_lttng_writer_open_element(writer, config_element_attributes);
 897         if (ret) {
 898                 goto end;
 899         }
 900
 901         /* Overwrite */
 902         ret = mi_lttng_writer_write_element_string(writer,
 903                 config_element_overwrite_mode,
 904                 attr->overwrite ? config_overwrite_mode_overwrite :
 905                         config_overwrite_mode_discard);
 906         if (ret) {
 907                 goto end;
 908         }
 909
 910         /* Sub buffer size in byte */
 911         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 912                 config_element_subbuf_size, attr->subbuf_size);
 913         if (ret) {
 914                 goto end;
 915         }
 916
 917         /* Number of subbuffer (power of two) */
 918         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 919                 config_element_num_subbuf,
 920                 attr->num_subbuf);
 921         if (ret) {
 922                 goto end;
 923         }
 924
 925         /* Switch timer interval in usec */
 926         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 927                 config_element_switch_timer_interval,
 928                 attr->switch_timer_interval);
 929         if (ret) {
 930                 goto end;
 931         }
 932
 933         /* Read timer interval in usec */
 934         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 935                 config_element_read_timer_interval,
 936                 attr->read_timer_interval);
 937         if (ret) {
 938                 goto end;
 939         }
 940
 941         /* Event output */
 942         ret = mi_lttng_writer_write_element_string(writer,
 943                 config_element_output_type,
 944                 attr->output == LTTNG_EVENT_SPLICE ?
 945                 config_output_type_splice : config_output_type_mmap);
 946         if (ret) {
 947                 goto end;
 948         }
 949
 950         /* Tracefile size in bytes */
 951         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 952                 config_element_tracefile_size, attr->tracefile_size);
 953         if (ret) {
 954                 goto end;
 955         }
 956
 957         /* Count of tracefiles */
 958         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 959                 config_element_tracefile_count,
 960                 attr->tracefile_count);
 961         if (ret) {
 962                 goto end;
 963         }
 964
 965         /* Live timer interval in usec*/
 966         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 967                 config_element_live_timer_interval,
 968                 attr->live_timer_interval);
 969         if (ret) {
 970                 goto end;
 971         }
 972
 973         /* Discarded events */
 974         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 975                 config_element_discarded_events,
 976                 discarded_events);
 977         if (ret) {
 978                 goto end;
 979         }
 980
 981         /* Lost packets */
 982         ret = mi_lttng_writer_write_element_unsigned_int(writer,
 983                 config_element_lost_packets,
 984                 lost_packets);
 985         if (ret) {
 986                 goto end;
 987         }
 988
 989         /* Closing attributes */
 990         ret = mi_lttng_writer_close_element(writer);
 991         if (ret) {
 992                 goto end;
 993         }
 994 end:
 995         return ret;
 996
 997 }
 998
 999 LTTNG_HIDDEN
1000 int mi_lttng_event_common_attributes(struct mi_writer *writer,
1001                 struct lttng_event *event)
1002 {
1003         int ret;
1004         const char *filter_expression;
1005
1006         /* Open event element */
1007         ret = mi_lttng_writer_open_element(writer, config_element_event);
1008         if (ret) {
1009                 goto end;
1010         }
1011
1012         /* Event name */
1013         ret = mi_lttng_writer_write_element_string(writer,
1014                         config_element_name, event->name);
1015         if (ret) {
1016                 goto end;
1017         }
1018
1019         /* Event type */
1020         ret = mi_lttng_writer_write_element_string(writer,
1021                         config_element_type, mi_lttng_eventtype_string(event->type));
1022         if (ret) {
1023                 goto end;
1024         }
1025
1026         /* Is event enabled */
1027         ret = mi_lttng_writer_write_element_bool(writer,
1028                         config_element_enabled, event->enabled);
1029         if (ret) {
1030                 goto end;
1031         }
1032
1033         /* Event filter expression */
1034         ret = lttng_event_get_filter_expression(event, &filter_expression);
1035         if (ret) {
1036                 goto end;
1037         }
1038
1039         if (filter_expression) {
1040                 ret = mi_lttng_writer_write_element_string(writer,
1041                                 config_element_filter_expression,
1042                                 filter_expression);
1043                 if (ret) {
1044                         goto end;
1045                 }
1046         }
1047
1048 end:
1049         return ret;
1050 }
1051
1052 static int write_event_exclusions(struct mi_writer *writer,
1053                 struct lttng_event *event)
1054 {
1055         int i;
1056         int ret;
1057         int exclusion_count;
1058
1059         /* Open event exclusions */
1060         ret = mi_lttng_writer_open_element(writer, config_element_exclusions);
1061         if (ret) {
1062                 goto end;
1063         }
1064
1065         exclusion_count = lttng_event_get_exclusion_name_count(event);
1066         if (exclusion_count < 0) {
1067                 ret = exclusion_count;
1068                 goto end;
1069         }
1070
1071         for (i = 0; i < exclusion_count; i++) {
1072                 const char *name;
1073
1074                 ret = lttng_event_get_exclusion_name(event, i, &name);
1075                 if (ret) {
1076                         /* Close exclusions */
1077                         mi_lttng_writer_close_element(writer);
1078                         goto end;
1079                 }
1080
1081                 ret = mi_lttng_writer_write_element_string(writer,
1082                                 config_element_exclusion, name);
1083                 if (ret) {
1084                         /* Close exclusions */
1085                         mi_lttng_writer_close_element(writer);
1086                         goto end;
1087                 }
1088         }
1089
1090         /* Close exclusions */
1091         ret = mi_lttng_writer_close_element(writer);
1092
1093 end:
1094         return ret;
1095 }
1096
1097 LTTNG_HIDDEN
1098 int mi_lttng_event_tracepoint_loglevel(struct mi_writer *writer,
1099                 struct lttng_event *event, enum lttng_domain_type domain)
1100 {
1101         int ret;
1102
1103         /* Event loglevel */
1104         ret = mi_lttng_writer_write_element_string(writer,
1105                         config_element_loglevel,
1106                         mi_lttng_loglevel_string(event->loglevel, domain));
1107         if (ret) {
1108                 goto end;
1109         }
1110
1111         /* Log level type */
1112         ret = mi_lttng_writer_write_element_string(writer,
1113                         config_element_loglevel_type,
1114                         mi_lttng_logleveltype_string(event->loglevel_type));
1115         if (ret) {
1116                 goto end;
1117         }
1118
1119         /* Event exclusions */
1120         ret = write_event_exclusions(writer, event);
1121
1122 end:
1123         return ret;
1124 }
1125
1126 LTTNG_HIDDEN
1127 int mi_lttng_event_tracepoint_no_loglevel(struct mi_writer *writer,
1128                 struct lttng_event *event)
1129 {
1130         /* event exclusion filter */
1131         return write_event_exclusions(writer, event);
1132 }
1133
1134 LTTNG_HIDDEN
1135 int mi_lttng_event_function_probe(struct mi_writer *writer,
1136                 struct lttng_event *event)
1137 {
1138         int ret;
1139
1140         ret = mi_lttng_writer_open_element(writer, config_element_attributes);
1141         if (ret) {
1142                 goto end;
1143         }
1144
1145         ret = mi_lttng_writer_open_element(writer, config_element_probe_attributes);
1146         if (ret) {
1147                 goto end;
1148         }
1149
1150         if (event->attr.probe.addr != 0) {
1151                 /* event probe address */
1152                 ret = mi_lttng_writer_write_element_unsigned_int(writer,
1153                                 config_element_address, event->attr.probe.addr);
1154                 if (ret) {
1155                         goto end;
1156                 }
1157         } else {
1158                 /* event probe offset */
1159                 ret = mi_lttng_writer_write_element_unsigned_int(writer,
1160                                 config_element_offset, event->attr.probe.offset);
1161                 if (ret) {
1162                         goto end;
1163                 }
1164
1165                 /* event probe symbol_name */
1166                 ret = mi_lttng_writer_write_element_string(writer,
1167                                 config_element_symbol_name, event->attr.probe.symbol_name);
1168                 if (ret) {
1169                         goto end;
1170                 }
1171         }
1172
1173         /* Close probe_attributes and attributes */
1174         ret = mi_lttng_close_multi_element(writer, 2);
1175 end:
1176         return ret;
1177 }
1178
1179 LTTNG_HIDDEN
1180 int mi_lttng_event_function_entry(struct mi_writer *writer,
1181                 struct lttng_event *event)
1182 {
1183         int ret;
1184
1185         ret = mi_lttng_writer_open_element(writer, config_element_attributes);
1186         if (ret) {
1187                 goto end;
1188         }
1189
1190         ret = mi_lttng_writer_open_element(writer, config_element_probe_attributes);
1191         if (ret) {
1192                 goto end;
1193         }
1194
1195         /* event probe symbol_name */
1196         ret = mi_lttng_writer_write_element_string(writer,
1197                         config_element_symbol_name, event->attr.ftrace.symbol_name);
1198         if (ret) {
1199                 goto end;
1200         }
1201
1202         /* Close function_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_events_open(struct mi_writer *writer)
1210 {
1211         return mi_lttng_writer_open_element(writer, config_element_events);
1212 }
1213
1214 LTTNG_HIDDEN
1215 int mi_lttng_event(struct mi_writer *writer,
1216                 struct lttng_event *event, int is_open, enum lttng_domain_type domain)
1217 {
1218         int ret;
1219
1220         ret = mi_lttng_event_common_attributes(writer, event);
1221         if (ret) {
1222                 goto end;
1223         }
1224
1225         switch (event->type) {
1226         case LTTNG_EVENT_TRACEPOINT:
1227         {
1228                 if (event->loglevel != -1) {
1229                         ret = mi_lttng_event_tracepoint_loglevel(writer, event, domain);
1230                 } else {
1231                         ret = mi_lttng_event_tracepoint_no_loglevel(writer, event);
1232                 }
1233                 break;
1234         }
1235         case LTTNG_EVENT_FUNCTION:
1236                 /* Fallthrough */
1237         case LTTNG_EVENT_PROBE:
1238                 ret = mi_lttng_event_function_probe(writer, event);
1239                 break;
1240         case LTTNG_EVENT_FUNCTION_ENTRY:
1241                 ret = mi_lttng_event_function_entry(writer, event);
1242                 break;
1243         case LTTNG_EVENT_ALL:
1244                 /* Fallthrough */
1245         default:
1246                 break;
1247         }
1248
1249         if (!is_open) {
1250                 ret = mi_lttng_writer_close_element(writer);
1251         }
1252
1253 end:
1254         return ret;
1255 }
1256
1257 LTTNG_HIDDEN
1258 int mi_lttng_trackers_open(struct mi_writer *writer)
1259 {
1260         return mi_lttng_writer_open_element(writer, config_element_trackers);
1261 }
1262
1263 LTTNG_HIDDEN
1264 int mi_lttng_pid_tracker_open(struct mi_writer *writer)
1265 {
1266         int ret;
1267
1268         /* Open element pid_tracker */
1269         ret = mi_lttng_writer_open_element(writer, config_element_pid_tracker);
1270         if (ret) {
1271                 goto end;
1272         }
1273
1274         /* Open targets element */
1275         ret = mi_lttng_targets_open(writer);
1276 end:
1277         return ret;
1278 }
1279
1280 LTTNG_HIDDEN
1281 int mi_lttng_pids_open(struct mi_writer *writer)
1282 {
1283         return mi_lttng_writer_open_element(writer, config_element_pids);
1284 }
1285
1286 /*
1287  * TODO: move the listing of pid for user agent to process semantic on
1288  * mi api bump. The use of process element break the mi api.
1289  */
1290 LTTNG_HIDDEN
1291 int mi_lttng_pid(struct mi_writer *writer, pid_t pid , const char *name,
1292                 int is_open)
1293 {
1294         int ret;
1295
1296         /* Open pid process */
1297         ret = mi_lttng_writer_open_element(writer, config_element_pid);
1298         if (ret) {
1299                 goto end;
1300         }
1301
1302         /* Writing pid number */
1303         ret = mi_lttng_writer_write_element_signed_int(writer,
1304                         mi_lttng_element_pid_id, (int)pid);
1305         if (ret) {
1306                 goto end;
1307         }
1308
1309         /* Writing name of the process */
1310         if (name) {
1311                 ret = mi_lttng_writer_write_element_string(writer, config_element_name,
1312                                 name);
1313                 if (ret) {
1314                         goto end;
1315                 }
1316         }
1317
1318         if (!is_open) {
1319                 /* Closing Pid */
1320                 ret = mi_lttng_writer_close_element(writer);
1321         }
1322
1323 end:
1324         return ret;
1325 }
1326
1327 LTTNG_HIDDEN
1328 int mi_lttng_targets_open(struct mi_writer *writer)
1329 {
1330         return mi_lttng_writer_open_element(writer,
1331                         config_element_targets);
1332 }
1333
1334 LTTNG_HIDDEN
1335 int mi_lttng_pid_target(struct mi_writer *writer, pid_t pid, int is_open)
1336 {
1337         int ret;
1338
1339         ret = mi_lttng_writer_open_element(writer,
1340                         config_element_target_pid);
1341         if (ret) {
1342                 goto end;
1343         }
1344
1345         /* Writing pid number
1346          * Special case for element all on track untrack command
1347          * All pid is represented as wildcard *
1348          */
1349         if ((int) pid == -1) {
1350                 ret = mi_lttng_writer_write_element_string(writer,
1351                                 config_element_pid,
1352                                 mi_lttng_element_track_untrack_all_wildcard);
1353         } else {
1354                 ret = mi_lttng_writer_write_element_signed_int(writer,
1355                                 config_element_pid, (int) pid);
1356         }
1357         if (ret) {
1358                 goto end;
1359         }
1360
1361         if (!is_open) {
1362                 ret = mi_lttng_writer_close_element(writer);
1363                 if (ret) {
1364                         goto end;
1365                 }
1366         }
1367
1368 end:
1369         return ret;
1370 }
1371
1372 LTTNG_HIDDEN
1373 int mi_lttng_event_fields_open(struct mi_writer *writer)
1374 {
1375         return mi_lttng_writer_open_element(writer, mi_lttng_element_event_fields);
1376 }
1377
1378 LTTNG_HIDDEN
1379 int mi_lttng_event_field(struct mi_writer *writer,
1380                 struct lttng_event_field *field)
1381 {
1382         int ret;
1383
1384         if (!field->field_name[0]) {
1385                 ret = 0;
1386                 goto end;
1387         }
1388
1389         /* Open field */
1390         ret = mi_lttng_writer_open_element(writer, mi_lttng_element_event_field);
1391         if (ret) {
1392                 goto end;
1393         }
1394
1395         if (!field->field_name[0]) {
1396                 goto close;
1397         }
1398
1399         /* Name */
1400         ret = mi_lttng_writer_write_element_string(writer, config_element_name,
1401                         field->field_name);
1402         if (ret) {
1403                 goto end;
1404         }
1405
1406         /* Type */
1407         ret = mi_lttng_writer_write_element_string(writer, config_element_type,
1408                         mi_lttng_eventfieldtype_string(field->type));
1409         if (ret) {
1410                 goto end;
1411         }
1412
1413         /* nowrite  */
1414         ret = mi_lttng_writer_write_element_signed_int(writer,
1415                         mi_lttng_element_nowrite, field->nowrite);
1416         if (ret) {
1417                 goto end;
1418         }
1419
1420 close:
1421         /* Close field element */
1422         ret = mi_lttng_writer_close_element(writer);
1423
1424 end:
1425         return ret;
1426 }
1427
1428 LTTNG_HIDDEN
1429 int mi_lttng_calibrate(struct mi_writer *writer,
1430                 struct lttng_calibrate *calibrate)
1431 {
1432         int ret;
1433
1434         /* Open calibrate element */
1435         ret = mi_lttng_writer_open_element(writer, mi_lttng_element_calibrate);
1436         if (ret) {
1437                 goto end;
1438         }
1439
1440         /* Calibration type */
1441         ret = mi_lttng_writer_write_element_string(writer, config_element_type,
1442                         mi_lttng_calibratetype_string(calibrate->type));
1443         if (ret) {
1444                 goto end;
1445         }
1446
1447         /* Closing calibrate element */
1448         ret = mi_lttng_writer_close_element(writer);
1449 end:
1450         return ret;
1451 }
1452
1453 LTTNG_HIDDEN
1454 int mi_lttng_perf_counter_context(struct mi_writer *writer,
1455                 struct lttng_event_perf_counter_ctx  *perf_context)
1456 {
1457         int ret;
1458
1459         /* Open perf_counter_context */
1460         ret = mi_lttng_writer_open_element(writer,
1461                         mi_lttng_element_perf_counter_context);
1462         if (ret) {
1463                 goto end;
1464         }
1465
1466         /* Type */
1467         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1468                         config_element_type, perf_context->type);
1469         if (ret) {
1470                 goto end;
1471         }
1472
1473         /* Config */
1474         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1475                         config_element_config, perf_context->config);
1476         if (ret) {
1477                 goto end;
1478         }
1479
1480         /* Name of the perf counter */
1481         ret = mi_lttng_writer_write_element_string(writer,
1482                         config_element_name, perf_context->name);
1483         if (ret) {
1484                 goto end;
1485         }
1486
1487         /* Close perf_counter_context */
1488         ret = mi_lttng_writer_close_element(writer);
1489 end:
1490         return ret;
1491 }
1492
1493 static
1494 int mi_lttng_app_context(struct mi_writer *writer,
1495                 const char *provider_name, const char *ctx_name)
1496 {
1497         int ret;
1498
1499         /* Open app */
1500         ret = mi_lttng_writer_open_element(writer,
1501                         config_element_context_app);
1502         if (ret) {
1503                 goto end;
1504         }
1505
1506         /* provider_name */
1507         ret = mi_lttng_writer_write_element_string(writer,
1508                         config_element_context_app_provider_name,
1509                         provider_name);
1510         if (ret) {
1511                 goto end;
1512         }
1513
1514         /* ctx_name */
1515         ret = mi_lttng_writer_write_element_string(writer,
1516                         config_element_context_app_ctx_name, ctx_name);
1517         if (ret) {
1518                 goto end;
1519         }
1520
1521         /* Close app */
1522         ret = mi_lttng_writer_close_element(writer);
1523 end:
1524         return ret;
1525 }
1526
1527 LTTNG_HIDDEN
1528 int mi_lttng_context(struct mi_writer *writer,
1529                 struct lttng_event_context *context, int is_open)
1530 {
1531         int ret;
1532
1533         /* Open context */
1534         ret = mi_lttng_writer_open_element(writer , config_element_context);
1535         if (ret) {
1536                 goto end;
1537         }
1538
1539         /* Special case for PERF_*_COUNTER
1540          * print the lttng_event_perf_counter_ctx*/
1541         switch (context->ctx) {
1542         case LTTNG_EVENT_CONTEXT_PERF_COUNTER:
1543         case LTTNG_EVENT_CONTEXT_PERF_THREAD_COUNTER:
1544         case LTTNG_EVENT_CONTEXT_PERF_CPU_COUNTER:
1545         {
1546                 struct lttng_event_perf_counter_ctx *perf_context =
1547                                 &context->u.perf_counter;
1548                 ret =  mi_lttng_perf_counter_context(writer, perf_context);
1549                 if (ret) {
1550                         goto end;
1551                 }
1552                 break;
1553         }
1554         case LTTNG_EVENT_CONTEXT_APP_CONTEXT:
1555         {
1556                 ret = mi_lttng_app_context(writer,
1557                                 context->u.app_ctx.provider_name,
1558                                 context->u.app_ctx.ctx_name);
1559                 if (ret) {
1560                         goto end;
1561                 }
1562                 break;
1563         }
1564         default:
1565         {
1566                 const char *type_string = mi_lttng_event_contexttype_string(
1567                                 context->ctx);
1568                 if (!type_string) {
1569                         ret = -LTTNG_ERR_INVALID;
1570                         goto end;
1571                 }
1572
1573                 /* Print context type */
1574                 ret = mi_lttng_writer_write_element_string(writer,
1575                                 config_element_type, type_string);
1576                 break;
1577         }
1578         }
1579
1580         /* Close context */
1581         if (!is_open) {
1582                 ret = mi_lttng_writer_close_element(writer);
1583         }
1584
1585 end:
1586         return ret;
1587 }
1588
1589 LTTNG_HIDDEN
1590 int mi_lttng_snapshot_output_session_name(struct mi_writer *writer,
1591                 const char *session_name)
1592 {
1593         int ret;
1594
1595         /* Open session element */
1596         ret = mi_lttng_writer_open_element(writer, config_element_session);
1597         if (ret) {
1598                 goto end;
1599         }
1600
1601         /* Snapshot output list for current session name */
1602         ret = mi_lttng_writer_write_element_string(writer, config_element_name,
1603                         session_name);
1604         if (ret) {
1605                 goto end;
1606         }
1607
1608         /* Open element snapshots (sequence one snapshot) */
1609         ret = mi_lttng_writer_open_element(writer, mi_lttng_element_snapshots);
1610         if (ret) {
1611                 goto end;
1612         }
1613
1614 end:
1615         return ret;
1616 }
1617
1618 LTTNG_HIDDEN
1619 int mi_lttng_snapshot_list_output(struct mi_writer *writer,
1620                 struct lttng_snapshot_output *output)
1621 {
1622         int ret;
1623
1624         /* Open element snapshot output */
1625         ret = mi_lttng_writer_open_element(writer,
1626                         mi_lttng_element_command_snapshot);
1627         if (ret) {
1628                 goto end;
1629         }
1630
1631         /* ID of the snapshot output */
1632         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1633                         mi_lttng_element_id, output->id);
1634         if (ret) {
1635                 goto end;
1636         }
1637
1638         /* Name of the output */
1639         ret = mi_lttng_writer_write_element_string(writer, config_element_name,
1640                         output->name);
1641         if (ret) {
1642                 goto end;
1643         }
1644
1645         /* Destination of the output (ctrl_url)*/
1646         ret = mi_lttng_writer_write_element_string(writer,
1647                         mi_lttng_element_snapshot_ctrl_url, output->ctrl_url);
1648         if (ret) {
1649                 goto end;
1650         }
1651
1652         /* Destination of the output (data_url) */
1653         ret = mi_lttng_writer_write_element_string(writer,
1654                         mi_lttng_element_snapshot_data_url, output->data_url);
1655         if (ret) {
1656                 goto end;
1657         }
1658
1659         /* total size of all stream combined */
1660         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1661                         mi_lttng_element_snapshot_max_size, output->max_size);
1662         if (ret) {
1663                 goto end;
1664         }
1665
1666         /* Close snapshot output element */
1667         ret = mi_lttng_writer_close_element(writer);
1668
1669 end:
1670         return ret;
1671 }
1672
1673 LTTNG_HIDDEN
1674 int mi_lttng_snapshot_del_output(struct mi_writer *writer, int id,
1675                 const char *name, const char *current_session_name)
1676 {
1677         int ret;
1678
1679         /* Open element del_snapshot */
1680         ret = mi_lttng_writer_open_element(writer,
1681                         mi_lttng_element_command_snapshot);
1682         if (ret) {
1683                 goto end;
1684         }
1685
1686
1687         if (id != UINT32_MAX) {
1688                 /* "Snapshot output "id" successfully deleted
1689                  * for "current_session_name"
1690                  * ID of the snapshot output
1691                  */
1692                 ret = mi_lttng_writer_write_element_unsigned_int(writer,
1693                                 mi_lttng_element_id, id);
1694                 if (ret) {
1695                         goto end;
1696                 }
1697         } else {
1698                 /* "Snapshot output "name" successfully deleted
1699                  * for session "current_session_name"
1700                  * Name of the output
1701                  */
1702                 ret = mi_lttng_writer_write_element_string(writer, config_element_name,
1703                                 name);
1704                 if (ret) {
1705                         goto end;
1706                 }
1707         }
1708
1709         /* Snapshot was deleted for session "current_session_name"*/
1710         ret = mi_lttng_writer_write_element_string(writer,
1711                         mi_lttng_element_snapshot_session_name,
1712                         current_session_name);
1713         if (ret) {
1714                 goto end;
1715         }
1716
1717         /* Close snapshot element */
1718         ret = mi_lttng_writer_close_element(writer);
1719
1720 end:
1721         return ret;
1722 }
1723
1724 LTTNG_HIDDEN
1725 int mi_lttng_snapshot_add_output(struct mi_writer *writer,
1726                 const char *current_session_name, const char *n_ptr,
1727                 struct lttng_snapshot_output *output)
1728 {
1729         int ret;
1730
1731         /* Open element snapshot */
1732         ret = mi_lttng_writer_open_element(writer,
1733                         mi_lttng_element_command_snapshot);
1734         if (ret) {
1735                 goto end;
1736         }
1737
1738         /* Snapshot output id */
1739         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1740                         mi_lttng_element_id, output->id);
1741         if (ret) {
1742                 goto end;
1743         }
1744
1745         /* Snapshot output names */
1746         ret = mi_lttng_writer_write_element_string(writer,
1747                         config_element_name, n_ptr);
1748         if (ret) {
1749                 goto end;
1750         }
1751
1752         /* Destination of the output (ctrl_url)*/
1753         ret = mi_lttng_writer_write_element_string(writer,
1754                         mi_lttng_element_snapshot_ctrl_url, output->ctrl_url);
1755         if (ret) {
1756                 goto end;
1757         }
1758
1759         /* Snapshot added for session "current_session_name"*/
1760         ret = mi_lttng_writer_write_element_string(writer,
1761                         mi_lttng_element_snapshot_session_name, current_session_name);
1762         if (ret) {
1763                 goto end;
1764         }
1765
1766         /* total size of all stream combined */
1767         ret = mi_lttng_writer_write_element_unsigned_int(writer,
1768                         mi_lttng_element_snapshot_max_size, output->max_size);
1769         if (ret) {
1770                 goto end;
1771         }
1772
1773         /* Close snapshot element */
1774         ret = mi_lttng_writer_close_element(writer);
1775
1776 end:
1777         return ret;
1778 }
1779
1780 LTTNG_HIDDEN
1781 int mi_lttng_snapshot_record(struct mi_writer *writer,
1782                 const char *current_session_name, const char *url,
1783                 const char *cmdline_ctrl_url, const char *cmdline_data_url)
1784 {
1785         int ret;
1786
1787         /* Open element snapshot */
1788         ret = mi_lttng_writer_open_element(writer,
1789                         mi_lttng_element_command_snapshot);
1790         if (ret) {
1791                 goto end;
1792         }
1793
1794         /*
1795          * If a valid an URL was given, serialize it,
1796          * else take the command line data and ctrl urls*/
1797         if (url) {
1798                 /* Destination of the output (ctrl_url)*/
1799                 ret = mi_lttng_writer_write_element_string(writer,
1800                                 mi_lttng_element_snapshot_ctrl_url, url);
1801                 if (ret) {
1802                         goto end;
1803                 }
1804         } else if (cmdline_ctrl_url) {
1805                 /* Destination of the output (ctrl_url)*/
1806                 ret = mi_lttng_writer_write_element_string(writer,
1807                                 mi_lttng_element_snapshot_ctrl_url, cmdline_ctrl_url);
1808                 if (ret) {
1809                         goto end;
1810                 }
1811
1812                 /* Destination of the output (data_url) */
1813                 ret = mi_lttng_writer_write_element_string(writer,
1814                                 mi_lttng_element_snapshot_data_url, cmdline_data_url);
1815                 if (ret) {
1816                         goto end;
1817                 }
1818         }
1819
1820         /* Close record_snapshot element */
1821         ret = mi_lttng_writer_close_element(writer);
1822
1823 end:
1824         return ret;
1825 }