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