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