| 1 | /* |
| 2 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License, version 2 only, |
| 6 | * as published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 11 | * GNU General Public License for more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public License along |
| 14 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 15 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| 16 | */ |
| 17 | |
| 18 | #define _LGPL_SOURCE |
| 19 | #include <assert.h> |
| 20 | #include <ctype.h> |
| 21 | #include <popt.h> |
| 22 | #include <stdio.h> |
| 23 | #include <stdlib.h> |
| 24 | #include <string.h> |
| 25 | #include <sys/stat.h> |
| 26 | #include <sys/types.h> |
| 27 | #include <time.h> |
| 28 | #include <unistd.h> |
| 29 | #include <signal.h> |
| 30 | #include <sys/wait.h> |
| 31 | |
| 32 | #include <common/mi-lttng.h> |
| 33 | #include <common/config/session-config.h> |
| 34 | |
| 35 | #include "../command.h" |
| 36 | #include "../utils.h" |
| 37 | |
| 38 | #include <common/defaults.h> |
| 39 | #include <common/sessiond-comm/sessiond-comm.h> |
| 40 | #include <common/uri.h> |
| 41 | #include <common/utils.h> |
| 42 | #include <lttng/snapshot.h> |
| 43 | |
| 44 | static char *opt_output_path; |
| 45 | static char *opt_session_name; |
| 46 | static char *opt_url; |
| 47 | static char *opt_ctrl_url; |
| 48 | static char *opt_data_url; |
| 49 | static char *opt_shm_path; |
| 50 | static char *opt_template_path; |
| 51 | static int opt_no_consumer; |
| 52 | static int opt_no_output; |
| 53 | static int opt_snapshot; |
| 54 | static unsigned int opt_live_timer; |
| 55 | static bool opt_default_name; |
| 56 | static bool opt_default_output; |
| 57 | |
| 58 | enum { |
| 59 | OPT_HELP = 1, |
| 60 | OPT_LIST_OPTIONS, |
| 61 | OPT_LIVE_TIMER, |
| 62 | OPT_DEFAULT_NAME, |
| 63 | OPT_DEFAULT_OUTPUT, |
| 64 | }; |
| 65 | |
| 66 | enum output_type { |
| 67 | OUTPUT_UNKNOWN = -1, |
| 68 | OUTPUT_NONE, |
| 69 | OUTPUT_LOCAL, |
| 70 | OUTPUT_NET, |
| 71 | }; |
| 72 | enum session_type { |
| 73 | SESSION_UNKNOWN = -1, |
| 74 | SESSION_NORMAL, |
| 75 | SESSION_LIVE, |
| 76 | SESSION_SNAPSHOT, |
| 77 | }; |
| 78 | |
| 79 | |
| 80 | static struct mi_writer *writer; |
| 81 | |
| 82 | static struct poptOption long_options[] = { |
| 83 | /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */ |
| 84 | {"help", 'h', POPT_ARG_NONE, NULL, OPT_HELP, NULL, NULL}, |
| 85 | {"output", 'o', POPT_ARG_STRING, &opt_output_path, 0, NULL, NULL}, |
| 86 | {"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL}, |
| 87 | {"set-url", 'U', POPT_ARG_STRING, &opt_url, 0, 0, 0}, |
| 88 | {"ctrl-url", 'C', POPT_ARG_STRING, &opt_ctrl_url, 0, 0, 0}, |
| 89 | {"data-url", 'D', POPT_ARG_STRING, &opt_data_url, 0, 0, 0}, |
| 90 | {"no-output", 0, POPT_ARG_VAL, &opt_no_output, 1, 0, 0}, |
| 91 | {"no-consumer", 0, POPT_ARG_VAL, &opt_no_consumer, 1, 0, 0}, |
| 92 | {"snapshot", 0, POPT_ARG_VAL, &opt_snapshot, 1, 0, 0}, |
| 93 | {"live", 0, POPT_ARG_INT | POPT_ARGFLAG_OPTIONAL, 0, OPT_LIVE_TIMER, 0, 0}, |
| 94 | {"shm-path", 0, POPT_ARG_STRING, &opt_shm_path, 0, 0, 0}, |
| 95 | {"template-path", 0, POPT_ARG_STRING, &opt_template_path, 0, 0, 0}, |
| 96 | {"default-name", 0, POPT_ARG_NONE, NULL, OPT_DEFAULT_NAME, 0, 0}, |
| 97 | {"default-output", 0, POPT_ARG_NONE, NULL, OPT_DEFAULT_OUTPUT, 0, 0}, |
| 98 | {0, 0, 0, 0, 0, 0, 0} |
| 99 | }; |
| 100 | |
| 101 | /* |
| 102 | * Please have a look at src/lib/lttng-ctl/lttng-ctl.c for more information on |
| 103 | * why this declaration exists and used ONLY in for this command. |
| 104 | */ |
| 105 | extern int _lttng_create_session_ext(const char *name, const char *url, |
| 106 | const char *datetime); |
| 107 | |
| 108 | /* |
| 109 | * Retrieve the created session and mi output it based on provided argument |
| 110 | * This is currently a summary of what was pretty printed and is subject to |
| 111 | * enhancements. |
| 112 | */ |
| 113 | static int mi_created_session(const char *session_name) |
| 114 | { |
| 115 | int ret, i, count, found; |
| 116 | struct lttng_session *sessions; |
| 117 | |
| 118 | /* session_name should not be null */ |
| 119 | assert(session_name); |
| 120 | assert(writer); |
| 121 | |
| 122 | count = lttng_list_sessions(&sessions); |
| 123 | if (count < 0) { |
| 124 | ret = count; |
| 125 | ERR("%s", lttng_strerror(ret)); |
| 126 | goto error; |
| 127 | } |
| 128 | |
| 129 | if (count == 0) { |
| 130 | ERR("Error session creation failed: session %s not found", session_name); |
| 131 | ret = -LTTNG_ERR_SESS_NOT_FOUND; |
| 132 | goto end; |
| 133 | } |
| 134 | |
| 135 | found = 0; |
| 136 | for (i = 0; i < count; i++) { |
| 137 | if (strncmp(sessions[i].name, session_name, NAME_MAX) == 0) { |
| 138 | found = 1; |
| 139 | ret = mi_lttng_session(writer, &sessions[i], 0); |
| 140 | if (ret) { |
| 141 | goto error; |
| 142 | } |
| 143 | break; |
| 144 | } |
| 145 | } |
| 146 | |
| 147 | if (!found) { |
| 148 | ret = -LTTNG_ERR_SESS_NOT_FOUND; |
| 149 | } else { |
| 150 | ret = CMD_SUCCESS; |
| 151 | } |
| 152 | |
| 153 | error: |
| 154 | free(sessions); |
| 155 | end: |
| 156 | return ret; |
| 157 | } |
| 158 | |
| 159 | /* |
| 160 | * For a session name, set the consumer URLs. |
| 161 | */ |
| 162 | static int set_consumer_url(const char *session_name, const char *ctrl_url, |
| 163 | const char *data_url) |
| 164 | { |
| 165 | int ret; |
| 166 | struct lttng_handle *handle; |
| 167 | |
| 168 | assert(session_name); |
| 169 | |
| 170 | /* |
| 171 | * Set handle with the session_name, but no domain. This implies that |
| 172 | * the actions taken with this handle apply on the tracing session |
| 173 | * rather then the domain-specific session. |
| 174 | */ |
| 175 | handle = lttng_create_handle(session_name, NULL); |
| 176 | if (handle == NULL) { |
| 177 | ret = CMD_FATAL; |
| 178 | goto error; |
| 179 | } |
| 180 | |
| 181 | ret = lttng_set_consumer_url(handle, ctrl_url, data_url); |
| 182 | if (ret < 0) { |
| 183 | goto error; |
| 184 | } |
| 185 | |
| 186 | error: |
| 187 | lttng_destroy_handle(handle); |
| 188 | return ret; |
| 189 | } |
| 190 | |
| 191 | static int add_snapshot_output(const char *session_name, const char *ctrl_url, |
| 192 | const char *data_url) |
| 193 | { |
| 194 | int ret; |
| 195 | struct lttng_snapshot_output *output = NULL; |
| 196 | |
| 197 | assert(session_name); |
| 198 | |
| 199 | output = lttng_snapshot_output_create(); |
| 200 | if (!output) { |
| 201 | ret = CMD_FATAL; |
| 202 | goto error_create; |
| 203 | } |
| 204 | |
| 205 | if (ctrl_url) { |
| 206 | ret = lttng_snapshot_output_set_ctrl_url(ctrl_url, output); |
| 207 | if (ret < 0) { |
| 208 | goto error; |
| 209 | } |
| 210 | } |
| 211 | |
| 212 | if (data_url) { |
| 213 | ret = lttng_snapshot_output_set_data_url(data_url, output); |
| 214 | if (ret < 0) { |
| 215 | goto error; |
| 216 | } |
| 217 | } |
| 218 | |
| 219 | /* This call, if successful, populates the id of the output object. */ |
| 220 | ret = lttng_snapshot_add_output(session_name, output); |
| 221 | if (ret < 0) { |
| 222 | goto error; |
| 223 | } |
| 224 | |
| 225 | error: |
| 226 | lttng_snapshot_output_destroy(output); |
| 227 | error_create: |
| 228 | return ret; |
| 229 | } |
| 230 | |
| 231 | /* |
| 232 | * Validate the combinations of passed options |
| 233 | * |
| 234 | * CMD_ERROR on error |
| 235 | * CMD_SUCCESS on success |
| 236 | */ |
| 237 | static int validate_command_options(enum session_type type) |
| 238 | { |
| 239 | int ret = CMD_SUCCESS; |
| 240 | |
| 241 | if (opt_snapshot && opt_live_timer) { |
| 242 | ERR("Snapshot and live modes are mutually exclusive."); |
| 243 | ret = CMD_ERROR; |
| 244 | goto error; |
| 245 | } |
| 246 | |
| 247 | if ((!opt_ctrl_url && opt_data_url) || (opt_ctrl_url && !opt_data_url)) { |
| 248 | ERR("Control and data URLs must both be set."); |
| 249 | ret = CMD_ERROR; |
| 250 | goto error; |
| 251 | } |
| 252 | |
| 253 | if (opt_template_path) { |
| 254 | /* Restriction on flags exist when using template */ |
| 255 | /* Session type flags are not permitted */ |
| 256 | /* --live & --snapshot */ |
| 257 | if ((opt_live_timer && type != SESSION_LIVE) || |
| 258 | (opt_snapshot && type != SESSION_SNAPSHOT)) { |
| 259 | ERR("It is not possible to change the session type of a template"); |
| 260 | ret = CMD_ERROR; |
| 261 | goto error; |
| 262 | } |
| 263 | } |
| 264 | |
| 265 | if (opt_session_name && opt_default_name) { |
| 266 | ERR("A session name must not be provided if the --default-name option is used"); |
| 267 | ret = CMD_ERROR; |
| 268 | goto error; |
| 269 | } |
| 270 | |
| 271 | if (opt_default_output && (opt_data_url || opt_ctrl_url || opt_url || |
| 272 | opt_output_path)) { |
| 273 | ERR("The --default-output option may not be used with the --output/-o, --set-url/-U, --ctrl-url/-C, or --data-url/-D options"); |
| 274 | ret = CMD_ERROR; |
| 275 | goto error; |
| 276 | } |
| 277 | error: |
| 278 | return ret; |
| 279 | } |
| 280 | |
| 281 | /* |
| 282 | * Create a session using direct calls to liblttng-ctl. |
| 283 | * |
| 284 | * Return CMD_SUCCESS on success, negative value on internal lttng errors and positive |
| 285 | * value on command errors. |
| 286 | */ |
| 287 | static int create_session_basic (const char *session_name, |
| 288 | enum session_type session_type, |
| 289 | int live_timer, |
| 290 | enum output_type output_type, |
| 291 | const char* url, |
| 292 | const char* ctrl_url, |
| 293 | const char* data_url, |
| 294 | const char* shm_path, |
| 295 | const char* datetime) |
| 296 | { |
| 297 | /* Create session based on session creation */ |
| 298 | int ret = CMD_SUCCESS; |
| 299 | const char *pathname; |
| 300 | |
| 301 | assert(datetime); |
| 302 | |
| 303 | if (opt_relayd_path) { |
| 304 | pathname = opt_relayd_path; |
| 305 | } else { |
| 306 | pathname = INSTALL_BIN_PATH "/lttng-relayd"; |
| 307 | } |
| 308 | |
| 309 | switch (session_type) { |
| 310 | case SESSION_NORMAL: |
| 311 | ret = _lttng_create_session_ext(session_name, url, datetime); |
| 312 | break; |
| 313 | case SESSION_SNAPSHOT: |
| 314 | if (output_type == OUTPUT_NONE) { |
| 315 | ERR("--no-output on a snapshot session is invalid"); |
| 316 | ret = CMD_UNSUPPORTED; |
| 317 | goto error; |
| 318 | } |
| 319 | ret = lttng_create_session_snapshot(session_name, url); |
| 320 | break; |
| 321 | case SESSION_LIVE: |
| 322 | if (output_type == OUTPUT_NONE) { |
| 323 | ERR("--no-output on a live session is invalid"); |
| 324 | ret = CMD_UNSUPPORTED; |
| 325 | goto error; |
| 326 | } |
| 327 | |
| 328 | if (output_type == OUTPUT_LOCAL) { |
| 329 | ERR("Local file output on a live session is invalid"); |
| 330 | ret = CMD_UNSUPPORTED; |
| 331 | goto error; |
| 332 | } |
| 333 | if (output_type != OUTPUT_NET && !check_relayd() && |
| 334 | spawn_relayd(pathname, 0) < 0) { |
| 335 | ret = CMD_FATAL; |
| 336 | goto error; |
| 337 | } |
| 338 | ret = lttng_create_session_live(session_name, url, live_timer); |
| 339 | break; |
| 340 | default: |
| 341 | ERR("Unknown session type"); |
| 342 | ret = CMD_UNDEFINED; |
| 343 | goto error; |
| 344 | } |
| 345 | |
| 346 | if (ret < 0) { |
| 347 | /* Don't set ret so the sessiond error is propagated. */ |
| 348 | switch (-ret) { |
| 349 | case LTTNG_ERR_EXIST_SESS: |
| 350 | WARN("Session %s already exists", session_name); |
| 351 | break; |
| 352 | default: |
| 353 | break; |
| 354 | } |
| 355 | goto error; |
| 356 | } |
| 357 | |
| 358 | /* Configure the session based on the output type */ |
| 359 | switch (output_type) { |
| 360 | case OUTPUT_LOCAL: |
| 361 | break; |
| 362 | case OUTPUT_NET: |
| 363 | if (!ctrl_url || !data_url) { |
| 364 | break; |
| 365 | } |
| 366 | |
| 367 | if (session_type == SESSION_SNAPSHOT) { |
| 368 | ret = add_snapshot_output(session_name, ctrl_url, |
| 369 | data_url); |
| 370 | } else { |
| 371 | /* |
| 372 | * Normal sessions and live sessions behave the same way |
| 373 | * regarding consumer url. |
| 374 | */ |
| 375 | ret = set_consumer_url(session_name, ctrl_url, data_url); |
| 376 | } |
| 377 | if (ret < 0) { |
| 378 | /* Destroy created session on errors */ |
| 379 | lttng_destroy_session(session_name); |
| 380 | goto error; |
| 381 | } |
| 382 | break; |
| 383 | case OUTPUT_NONE: |
| 384 | break; |
| 385 | default: |
| 386 | ERR("Unknown output type"); |
| 387 | ret = CMD_UNDEFINED; |
| 388 | goto error; |
| 389 | } |
| 390 | |
| 391 | /* |
| 392 | * Set the session shared memory path |
| 393 | */ |
| 394 | if (shm_path) { |
| 395 | ret = lttng_set_session_shm_path(session_name, shm_path); |
| 396 | if (ret < 0) { |
| 397 | lttng_destroy_session(session_name); |
| 398 | goto error; |
| 399 | } |
| 400 | } |
| 401 | error: |
| 402 | return ret; |
| 403 | } |
| 404 | |
| 405 | static int generate_output(const char *session_name, |
| 406 | enum session_type session_type, |
| 407 | int live_timer, |
| 408 | enum output_type output_type, |
| 409 | const char* url, |
| 410 | const char* ctrl_url, |
| 411 | const char* data_url, |
| 412 | const char* shm_path) |
| 413 | { |
| 414 | int ret = CMD_SUCCESS; |
| 415 | |
| 416 | /* |
| 417 | * TODO move this to after session name |
| 418 | * for now we only emulate previous behaviour. |
| 419 | */ |
| 420 | if (session_type != SESSION_SNAPSHOT) { |
| 421 | if (ctrl_url) { |
| 422 | MSG("Control URL %s set for session %s", ctrl_url, session_name); |
| 423 | } |
| 424 | |
| 425 | if (data_url) { |
| 426 | MSG("Data URL %s set for session %s", data_url, session_name); |
| 427 | } |
| 428 | } |
| 429 | |
| 430 | if (url && output_type == OUTPUT_LOCAL) { |
| 431 | /* Remove the file:// */ |
| 432 | if (strlen(url) > strlen("file://")){ |
| 433 | url = url + strlen("file://"); |
| 434 | } |
| 435 | } |
| 436 | |
| 437 | MSG("Session %s created.", session_name); |
| 438 | if (url && session_type != SESSION_SNAPSHOT) { |
| 439 | MSG("Traces will be written in %s", url); |
| 440 | |
| 441 | if (live_timer) { |
| 442 | MSG("Live timer set to %u usec", live_timer); |
| 443 | } |
| 444 | } else if (session_type == SESSION_SNAPSHOT) { |
| 445 | if (url) { |
| 446 | MSG("Default snapshot output set to: %s", url); |
| 447 | } |
| 448 | MSG("Snapshot mode set. Every channel enabled for that session will " |
| 449 | "be set to mmap output, and default to overwrite mode."); |
| 450 | } |
| 451 | |
| 452 | if (shm_path) { |
| 453 | MSG("Session %s set to shm_path: %s.", session_name, |
| 454 | shm_path); |
| 455 | } |
| 456 | |
| 457 | /* Mi output */ |
| 458 | if (lttng_opt_mi) { |
| 459 | ret = mi_created_session(session_name); |
| 460 | if (ret) { |
| 461 | ret = CMD_ERROR; |
| 462 | goto error; |
| 463 | } |
| 464 | } |
| 465 | error: |
| 466 | return ret; |
| 467 | } |
| 468 | |
| 469 | static int parse_template (struct config_document *template, |
| 470 | char **session_name, |
| 471 | enum session_type *session_type, |
| 472 | int *live_timer, |
| 473 | enum output_type *output_type, |
| 474 | char **url, |
| 475 | char **ctrl_url, |
| 476 | char **data_url, |
| 477 | char **shm_path) |
| 478 | { |
| 479 | int ret = 0; |
| 480 | int printed_bytes; |
| 481 | char *raw_value = NULL; |
| 482 | |
| 483 | assert(template); |
| 484 | |
| 485 | /* Session name */ |
| 486 | *session_name = config_document_get_element_value(template,"/sessions/session/name"); |
| 487 | |
| 488 | /* Check the type of session we have in the template */ |
| 489 | if(config_document_element_exist(template, "/sessions/session/attributes/snapshot_mode")) { |
| 490 | *session_type = SESSION_SNAPSHOT; |
| 491 | } else if (config_document_element_exist(template, "/sessions/session/attributes/live_timer_interval")) { |
| 492 | *session_type = SESSION_LIVE; |
| 493 | raw_value = config_document_get_element_value(template,"/sessions/session/attributes/live_timer_interval"); |
| 494 | *live_timer = config_parse_value(raw_value); |
| 495 | free(raw_value); |
| 496 | raw_value = NULL; |
| 497 | } else { |
| 498 | *session_type = SESSION_NORMAL; |
| 499 | } |
| 500 | |
| 501 | /* Output */ |
| 502 | switch (*session_type) { |
| 503 | case SESSION_NORMAL: |
| 504 | case SESSION_LIVE: |
| 505 | if (!config_document_element_exist(template, "/sessions/session/output/consumer_output/destination")){ |
| 506 | break; |
| 507 | } |
| 508 | if (config_document_element_exist(template, "/sessions/session/output/consumer_output/destination/path")){ |
| 509 | raw_value = config_document_get_element_value(template, "/sessions/session/output/consumer_output/destination/path"); |
| 510 | if (!raw_value) { |
| 511 | ret = -1; |
| 512 | goto error; |
| 513 | } |
| 514 | |
| 515 | if (strlen(raw_value) > 0) { |
| 516 | *output_type = OUTPUT_LOCAL; |
| 517 | printed_bytes = asprintf(url, "file://%s", raw_value); |
| 518 | if (printed_bytes < 0) { |
| 519 | ret = -1; |
| 520 | goto error; |
| 521 | } |
| 522 | } else { |
| 523 | *output_type = OUTPUT_NONE; |
| 524 | } |
| 525 | |
| 526 | free(raw_value); |
| 527 | raw_value = NULL; |
| 528 | break; |
| 529 | } else if(config_document_element_exist(template, "/sessions/session/output/consumer_output/destination/net_output")) { |
| 530 | *ctrl_url = config_document_get_element_value(template, "/sessions/session/output/consumer_output/destination/net_output/control_uri"); |
| 531 | *data_url = config_document_get_element_value(template, "/sessions/session/output/consumer_output/destination/net_output/data_uri"); |
| 532 | if (!*ctrl_url || ! *data_url) { |
| 533 | ret = -1; |
| 534 | goto error; |
| 535 | } |
| 536 | *output_type = OUTPUT_NET; |
| 537 | } else { |
| 538 | /* There is no output definition */ |
| 539 | } |
| 540 | break; |
| 541 | case SESSION_SNAPSHOT: |
| 542 | if (!config_document_element_exist(template, "/sessions/session/output/snapshot_outputs/output/consumer_output/destination")){ |
| 543 | break; |
| 544 | } |
| 545 | if (config_document_element_exist(template, "/sessions/session/output/snapshot_outputs/output/consumer_output/destination/path")){ |
| 546 | raw_value = config_document_get_element_value(template, "/sessions/session/output/snapshot_outputs/output/consumer_output/destination/path"); |
| 547 | if (!raw_value) { |
| 548 | ret = -1; |
| 549 | goto error; |
| 550 | } |
| 551 | |
| 552 | if (strlen(raw_value) > 0) { |
| 553 | *output_type = OUTPUT_LOCAL; |
| 554 | printed_bytes = asprintf(url, "file://%s", raw_value); |
| 555 | if (printed_bytes < 0) { |
| 556 | ret = -1; |
| 557 | goto error; |
| 558 | } |
| 559 | } else { |
| 560 | *output_type = OUTPUT_NONE; |
| 561 | } |
| 562 | |
| 563 | free(raw_value); |
| 564 | raw_value = NULL; |
| 565 | break; |
| 566 | } else if(config_document_element_exist(template, "/sessions/session/output/snapshot_outputs/output/consumer_output/destination/net_output")) { |
| 567 | *ctrl_url = config_document_get_element_value(template, "/sessions/session/output/snapshot_outputs/output/consumer_output/destination/net_output/control_uri"); |
| 568 | *data_url = config_document_get_element_value(template, "/sessions/session/output/snapshot_outputs/output/consumer_output/destination/net_output/data_uri"); |
| 569 | if (!*ctrl_url || ! *data_url) { |
| 570 | ret = -1; |
| 571 | goto error; |
| 572 | } |
| 573 | *output_type = OUTPUT_NET; |
| 574 | } else { |
| 575 | /* There is no output definition */ |
| 576 | } |
| 577 | break; |
| 578 | case SESSION_UNKNOWN: |
| 579 | ret = -1; |
| 580 | goto error; |
| 581 | } |
| 582 | |
| 583 | |
| 584 | /* shared memory path */ |
| 585 | *shm_path = config_document_get_element_value(template,"/sessions/session/shared_memory_path"); |
| 586 | |
| 587 | error: |
| 588 | free(raw_value); |
| 589 | return ret; |
| 590 | |
| 591 | } |
| 592 | static int create_session_from_template(struct config_document *template, |
| 593 | const char *session_name, |
| 594 | enum session_type session_type, |
| 595 | int live_timer, |
| 596 | enum output_type output_type, |
| 597 | const char *url, |
| 598 | const char *ctrl_url, |
| 599 | const char *data_url, |
| 600 | const char *shm_path, |
| 601 | const char *datetime) |
| 602 | { |
| 603 | int ret = CMD_SUCCESS; |
| 604 | int printed_bytes; |
| 605 | struct config_element *temp_element = NULL; |
| 606 | struct config_element *temp_element_child = NULL; |
| 607 | char tmp_ctrl_uri[PATH_MAX]; |
| 608 | char tmp_data_uri[PATH_MAX]; |
| 609 | struct lttng_uri *uris = NULL; |
| 610 | ssize_t uri_array_size = 0; |
| 611 | char *tmp_string = NULL; |
| 612 | |
| 613 | assert(template); |
| 614 | assert(session_name); |
| 615 | |
| 616 | memset(tmp_ctrl_uri, 0, sizeof(tmp_ctrl_uri)); |
| 617 | memset(tmp_data_uri, 0, sizeof(tmp_data_uri)); |
| 618 | |
| 619 | /* Session name */ |
| 620 | if (config_document_element_exist(template, "/sessions/session/name")) { |
| 621 | /* Replace the node value */ |
| 622 | config_document_replace_element_value(template, "/sessions/session/name", session_name); |
| 623 | } else { |
| 624 | /* insert the node */ |
| 625 | temp_element = config_element_create("name", session_name); |
| 626 | if (!temp_element) { |
| 627 | ERR("Could not create session name node configuration"); |
| 628 | ret = CMD_ERROR; |
| 629 | goto error; |
| 630 | } |
| 631 | ret = config_document_insert_element(template, "/sessions/session", temp_element); |
| 632 | if (ret) { |
| 633 | ERR("Could not insert session name node configuration"); |
| 634 | ret = CMD_ERROR; |
| 635 | goto error; |
| 636 | } |
| 637 | config_element_free(temp_element); |
| 638 | } |
| 639 | |
| 640 | /* |
| 641 | * Live timer |
| 642 | */ |
| 643 | if (session_type == SESSION_LIVE) { |
| 644 | if (config_document_element_exist(template, "/sessions/session/attributes/live_timer_interval")) { |
| 645 | printed_bytes = asprintf(&tmp_string, "%d", live_timer); |
| 646 | if (printed_bytes < 0) { |
| 647 | ERR("Asprintf failed for live timer"); |
| 648 | ret = CMD_ERROR; |
| 649 | goto error; |
| 650 | } |
| 651 | ret = config_document_replace_element_value(template, "/sessions/session/attributes/live_timer_interval", tmp_string); |
| 652 | |
| 653 | if (ret) { |
| 654 | printf("error: %d\n", ret); |
| 655 | ERR("Replacement of live_timer_interval failed"); |
| 656 | ret = CMD_ERROR; |
| 657 | goto error; |
| 658 | } |
| 659 | |
| 660 | free(tmp_string); |
| 661 | tmp_string = NULL; |
| 662 | } else { |
| 663 | ERR("Invalid live timer template. Missing live timer node"); |
| 664 | ret = CMD_ERROR; |
| 665 | goto error; |
| 666 | } |
| 667 | |
| 668 | } |
| 669 | |
| 670 | /* |
| 671 | * Generate the output node |
| 672 | */ |
| 673 | |
| 674 | /* Get output from urls */ |
| 675 | if (url) { |
| 676 | /* Get lttng uris from single url */ |
| 677 | uri_array_size = uri_parse_str_urls(url, NULL, &uris); |
| 678 | if (uri_array_size < 0) { |
| 679 | ret = CMD_ERROR; |
| 680 | goto error; |
| 681 | } |
| 682 | } else if (ctrl_url && data_url) { |
| 683 | uri_array_size = uri_parse_str_urls(ctrl_url, data_url, &uris); |
| 684 | if (uri_array_size < 0) { |
| 685 | ret = CMD_ERROR; |
| 686 | goto error; |
| 687 | } |
| 688 | } else { |
| 689 | /* --no-output */ |
| 690 | uri_array_size = 0; |
| 691 | } |
| 692 | |
| 693 | /* Validate if the session output type still match the passed data */ |
| 694 | if ( (uri_array_size == 0 && output_type != OUTPUT_NONE) || |
| 695 | (uri_array_size == 1 && output_type != OUTPUT_LOCAL) || |
| 696 | (uri_array_size == 2 && output_type != OUTPUT_NET)) { |
| 697 | ERR("Overwriting value for output do not match the base output type"); |
| 698 | ret = CMD_ERROR; |
| 699 | goto error; |
| 700 | } |
| 701 | |
| 702 | switch (output_type) { |
| 703 | case OUTPUT_NONE: |
| 704 | temp_element_child = config_element_create("path", ""); |
| 705 | if (!temp_element_child) { |
| 706 | ERR("Could not create empty path node configuration"); |
| 707 | ret = CMD_ERROR; |
| 708 | goto error; |
| 709 | } |
| 710 | break; |
| 711 | case OUTPUT_LOCAL: |
| 712 | temp_element_child = config_element_create("path", uris[0].dst.path); |
| 713 | if (!temp_element_child) { |
| 714 | ERR("Could not create local path node configuration"); |
| 715 | ret = CMD_ERROR; |
| 716 | goto error; |
| 717 | } |
| 718 | break; |
| 719 | case OUTPUT_NET: |
| 720 | uri_to_str_url(&uris[0], tmp_ctrl_uri, sizeof(tmp_ctrl_uri)); |
| 721 | uri_to_str_url(&uris[1], tmp_data_uri, sizeof(tmp_data_uri)); |
| 722 | |
| 723 | temp_element_child = config_element_create("net_output", NULL); |
| 724 | if (!temp_element_child) { |
| 725 | ERR("Could not create net_output node configuration"); |
| 726 | ret = CMD_ERROR; |
| 727 | goto error; |
| 728 | } |
| 729 | |
| 730 | temp_element = config_element_create("control_uri", tmp_ctrl_uri); |
| 731 | if (!temp_element_child) { |
| 732 | ERR("Could not create ctrl uri node configuration"); |
| 733 | ret = CMD_ERROR; |
| 734 | goto error; |
| 735 | } |
| 736 | |
| 737 | ret = config_element_add_child(temp_element_child, temp_element); |
| 738 | if (ret) { |
| 739 | ERR("Could not append control uri to the net_output node configuration"); |
| 740 | ret = CMD_ERROR; |
| 741 | goto error; |
| 742 | } |
| 743 | |
| 744 | config_element_free(temp_element); |
| 745 | temp_element = NULL; |
| 746 | |
| 747 | temp_element = config_element_create("data_uri", tmp_data_uri); |
| 748 | |
| 749 | if (!temp_element_child) { |
| 750 | ERR("Could not create data_uri configuration"); |
| 751 | ret = CMD_ERROR; |
| 752 | goto error; |
| 753 | } |
| 754 | |
| 755 | ret = config_element_add_child(temp_element_child, temp_element); |
| 756 | if (ret) { |
| 757 | ERR("Could not append data uri to the net_output node configuration"); |
| 758 | ret = CMD_ERROR; |
| 759 | goto error; |
| 760 | } |
| 761 | config_element_free(temp_element); |
| 762 | temp_element = NULL; |
| 763 | break; |
| 764 | default: |
| 765 | ret = CMD_ERROR; |
| 766 | goto error; |
| 767 | } |
| 768 | |
| 769 | temp_element = config_element_create("destination", NULL); |
| 770 | if (!temp_element) { |
| 771 | ERR("Could not create destination node configuration"); |
| 772 | ret = CMD_ERROR; |
| 773 | goto error; |
| 774 | } |
| 775 | |
| 776 | ret = config_element_add_child(temp_element, temp_element_child); |
| 777 | if (ret) { |
| 778 | ERR("Could not append output data to the destination node configuration"); |
| 779 | ret = CMD_ERROR; |
| 780 | goto error; |
| 781 | } |
| 782 | |
| 783 | config_element_free(temp_element_child); |
| 784 | temp_element_child = NULL; |
| 785 | |
| 786 | /* Construct the output/consumer_output/ node*/ |
| 787 | temp_element_child = temp_element; |
| 788 | temp_element = config_element_create("consumer_output", NULL); |
| 789 | if (!temp_element) { |
| 790 | ERR("Could not create consumer_output node configuration"); |
| 791 | ret = CMD_ERROR; |
| 792 | goto error; |
| 793 | } |
| 794 | |
| 795 | ret = config_element_add_child(temp_element, temp_element_child); |
| 796 | if (ret) { |
| 797 | ERR("Could not append output data to the consumer_output node configuration"); |
| 798 | ret = CMD_ERROR; |
| 799 | goto error; |
| 800 | } |
| 801 | |
| 802 | config_element_free(temp_element_child); |
| 803 | temp_element_child = config_element_create("enabled", "true"); |
| 804 | if (!temp_element_child) { |
| 805 | ERR("Could not create enbaled node configuration"); |
| 806 | ret = CMD_ERROR; |
| 807 | goto error; |
| 808 | } |
| 809 | |
| 810 | ret = config_element_add_child(temp_element, temp_element_child); |
| 811 | if (ret) { |
| 812 | ERR("Could not append node to the consumer_output node configuration"); |
| 813 | ret = CMD_ERROR; |
| 814 | goto error; |
| 815 | } |
| 816 | |
| 817 | config_element_free(temp_element_child); |
| 818 | temp_element_child = NULL; |
| 819 | |
| 820 | |
| 821 | temp_element_child = temp_element; |
| 822 | temp_element = config_element_create("output", NULL); |
| 823 | if (!temp_element) { |
| 824 | ERR("Could not create output node configuration"); |
| 825 | ret = CMD_ERROR; |
| 826 | goto error; |
| 827 | } |
| 828 | |
| 829 | ret = config_element_add_child(temp_element, temp_element_child); |
| 830 | if (ret) { |
| 831 | ERR("Could not append output data to the output node configuration"); |
| 832 | ret = CMD_ERROR; |
| 833 | goto error; |
| 834 | } |
| 835 | |
| 836 | config_element_free(temp_element_child); |
| 837 | temp_element_child = NULL; |
| 838 | |
| 839 | |
| 840 | /* |
| 841 | * validate and replace the destination node for each session type |
| 842 | * TODO: export string as const and simply assign a base path for the |
| 843 | * destination node based on the session type |
| 844 | **/ |
| 845 | switch (session_type) { |
| 846 | case SESSION_NORMAL: |
| 847 | case SESSION_LIVE: |
| 848 | break; |
| 849 | case SESSION_SNAPSHOT: |
| 850 | /* construct the output/snapshots_outputs/ */ |
| 851 | temp_element_child = temp_element; |
| 852 | temp_element = config_element_create("snapshot_outputs", NULL); |
| 853 | if (!temp_element) { |
| 854 | ERR("Could not create snapshot_outputs node configuration"); |
| 855 | ret = CMD_ERROR; |
| 856 | goto error; |
| 857 | } |
| 858 | |
| 859 | ret = config_element_add_child(temp_element, temp_element_child); |
| 860 | if (ret) { |
| 861 | ERR("Could not append output data to the snapshot_outputs node configuration"); |
| 862 | ret = CMD_ERROR; |
| 863 | goto error; |
| 864 | } |
| 865 | |
| 866 | config_element_free(temp_element_child); |
| 867 | temp_element_child = NULL; |
| 868 | |
| 869 | temp_element_child = temp_element; |
| 870 | temp_element = config_element_create("output", NULL); |
| 871 | if (!temp_element) { |
| 872 | ERR("Could not create output node configuration"); |
| 873 | ret = CMD_ERROR; |
| 874 | goto error; |
| 875 | } |
| 876 | |
| 877 | ret = config_element_add_child(temp_element, temp_element_child); |
| 878 | if (ret) { |
| 879 | ERR("Could not append output data to the output node configuration"); |
| 880 | ret = CMD_ERROR; |
| 881 | goto error; |
| 882 | } |
| 883 | |
| 884 | config_element_free(temp_element_child); |
| 885 | temp_element_child = NULL; |
| 886 | break; |
| 887 | default: |
| 888 | ERR("Invalid session type"); |
| 889 | ret = CMD_UNDEFINED; |
| 890 | goto error; |
| 891 | } |
| 892 | |
| 893 | if (!config_document_element_exist(template, "/sessions/session/output")) { |
| 894 | ret = config_document_insert_element(template, "/sessions/session", temp_element); |
| 895 | } else { |
| 896 | ret = config_document_replace_element(template, "/sessions/session/output", temp_element); |
| 897 | } |
| 898 | |
| 899 | config_element_free(temp_element); |
| 900 | temp_element = NULL; |
| 901 | |
| 902 | if (ret) { |
| 903 | ERR("%s", lttng_strerror(ret)); |
| 904 | ret = CMD_ERROR; |
| 905 | goto error; |
| 906 | } |
| 907 | |
| 908 | |
| 909 | /* Shm path */ |
| 910 | if (shm_path && config_document_element_exist(template, "/sessions/session/shared_memory_path")) { |
| 911 | /* Replace the node value */ |
| 912 | config_document_replace_element_value(template, "/sessions/session/shared_memory_path", shm_path); |
| 913 | } else if (shm_path) { |
| 914 | /* insert the node */ |
| 915 | temp_element = config_element_create("shared_memory_path", shm_path); |
| 916 | if (!temp_element) { |
| 917 | ERR("Could not create shared_memory_path node configuration"); |
| 918 | ret = CMD_ERROR; |
| 919 | goto error; |
| 920 | } |
| 921 | ret = config_document_insert_element(template, "/sessions/session", temp_element); |
| 922 | if (ret) { |
| 923 | ERR("Could not insert shared_memory_path node configuration"); |
| 924 | ret = CMD_ERROR; |
| 925 | goto error; |
| 926 | } |
| 927 | |
| 928 | config_element_free(temp_element); |
| 929 | temp_element = NULL; |
| 930 | } |
| 931 | |
| 932 | ret = config_load_configuration_sessions(template, session_name, 0); |
| 933 | |
| 934 | |
| 935 | error: |
| 936 | config_element_free(temp_element); |
| 937 | config_element_free(temp_element_child); |
| 938 | free(tmp_string); |
| 939 | free(uris); |
| 940 | return ret; |
| 941 | |
| 942 | } |
| 943 | |
| 944 | /* |
| 945 | * Create a tracing session. |
| 946 | * If no name is specified, a default name is generated. |
| 947 | * |
| 948 | * Returns one of the CMD_* result constants. |
| 949 | */ |
| 950 | static int create_session(void) |
| 951 | { |
| 952 | int ret; |
| 953 | int printed_bytes; |
| 954 | |
| 955 | |
| 956 | /* Template */ |
| 957 | struct config_document *template = NULL; |
| 958 | |
| 959 | /* Base data */ |
| 960 | enum session_type base_session_type = SESSION_UNKNOWN; |
| 961 | enum output_type base_output_type = OUTPUT_UNKNOWN; |
| 962 | char *base_session_name = NULL; |
| 963 | char *base_url = NULL; |
| 964 | char *base_ctrl_url = NULL; |
| 965 | char *base_data_url = NULL; |
| 966 | char *base_shm_path = NULL; |
| 967 | int base_live_timer = 0; |
| 968 | |
| 969 | /* Time data */ |
| 970 | char datetime[16]; |
| 971 | time_t rawtime; |
| 972 | struct tm *timeinfo = NULL; |
| 973 | |
| 974 | /* Temporary variables */ |
| 975 | char *traces_path = NULL; |
| 976 | char *temp_url = NULL; |
| 977 | char *session_name_date = NULL; |
| 978 | char *tmp_url = NULL; |
| 979 | char *tmp_home_path = NULL; |
| 980 | struct lttng_uri *uris = NULL; |
| 981 | ssize_t uri_array_size = 0; |
| 982 | |
| 983 | |
| 984 | /* Get date and time for automatic session name/path */ |
| 985 | time(&rawtime); |
| 986 | timeinfo = localtime(&rawtime); |
| 987 | strftime(datetime, sizeof(datetime), "%Y%m%d-%H%M%S", timeinfo); |
| 988 | |
| 989 | if (opt_template_path) { |
| 990 | /* Restriction on flags exist when using template */ |
| 991 | /* Session type flags are not permitted */ |
| 992 | /* --live & --snapshot */ |
| 993 | template = config_document_get(opt_template_path); |
| 994 | if (!template) { |
| 995 | ERR("Template could not be parsed"); |
| 996 | ret = CMD_ERROR; |
| 997 | goto error; |
| 998 | } |
| 999 | /* Load info from template if any */ |
| 1000 | /* TODO: might want to use a struct in the end for the session... */ |
| 1001 | ret = parse_template(template, &base_session_name, |
| 1002 | &base_session_type, |
| 1003 | &base_live_timer, |
| 1004 | &base_output_type, |
| 1005 | &base_url, |
| 1006 | &base_ctrl_url, |
| 1007 | &base_data_url, |
| 1008 | &base_shm_path); |
| 1009 | if (ret) { |
| 1010 | goto error; |
| 1011 | } |
| 1012 | } |
| 1013 | |
| 1014 | /* Option validation */ |
| 1015 | if (validate_command_options(base_session_type) != CMD_SUCCESS) { |
| 1016 | ret = CMD_ERROR; |
| 1017 | goto error; |
| 1018 | } |
| 1019 | |
| 1020 | /* Find the session type based on options */ |
| 1021 | if(base_session_type == SESSION_UNKNOWN) { |
| 1022 | if (opt_snapshot) { |
| 1023 | base_session_type = SESSION_SNAPSHOT; |
| 1024 | } else if (opt_live_timer) { |
| 1025 | base_session_type = SESSION_LIVE; |
| 1026 | } else { |
| 1027 | base_session_type = SESSION_NORMAL; |
| 1028 | } |
| 1029 | } |
| 1030 | |
| 1031 | /* |
| 1032 | * Session name handling |
| 1033 | */ |
| 1034 | if (opt_session_name) { |
| 1035 | /* Override the session name */ |
| 1036 | if (strlen(opt_session_name) > NAME_MAX) { |
| 1037 | ERR("Session name too long. Length must be lower or equal to %d", |
| 1038 | NAME_MAX); |
| 1039 | ret = LTTNG_ERR_SESSION_FAIL; |
| 1040 | free(session_name_date); |
| 1041 | goto error; |
| 1042 | } |
| 1043 | /* |
| 1044 | * Check if the session name begins with "auto-" or is exactly "auto". |
| 1045 | * Both are reserved for the default session name. See bug #449 to |
| 1046 | * understand why we need to check both here. |
| 1047 | */ |
| 1048 | if ((strncmp(opt_session_name, DEFAULT_SESSION_NAME "-", |
| 1049 | strlen(DEFAULT_SESSION_NAME) + 1) == 0) || |
| 1050 | (strncmp(opt_session_name, DEFAULT_SESSION_NAME, |
| 1051 | strlen(DEFAULT_SESSION_NAME)) == 0 && |
| 1052 | strlen(opt_session_name) == strlen(DEFAULT_SESSION_NAME))) { |
| 1053 | ERR("%s is a reserved keyword for default session(s)", |
| 1054 | DEFAULT_SESSION_NAME); |
| 1055 | |
| 1056 | ret = CMD_ERROR; |
| 1057 | goto error; |
| 1058 | } |
| 1059 | |
| 1060 | base_session_name = strndup(opt_session_name, NAME_MAX); |
| 1061 | if (!base_session_name) { |
| 1062 | PERROR("Strdup session name"); |
| 1063 | ret = CMD_ERROR; |
| 1064 | goto error; |
| 1065 | } |
| 1066 | |
| 1067 | printed_bytes = asprintf(&session_name_date, "%s-%s", base_session_name, datetime); |
| 1068 | if (printed_bytes < 0) { |
| 1069 | PERROR("Asprintf session name"); |
| 1070 | ret = CMD_ERROR; |
| 1071 | goto error; |
| 1072 | } |
| 1073 | DBG("Session name from command option set to %s", base_session_name); |
| 1074 | } else if (base_session_name && !opt_default_name) { |
| 1075 | printed_bytes = asprintf(&session_name_date, "%s-%s", base_session_name, datetime); |
| 1076 | if (printed_bytes < 0) { |
| 1077 | PERROR("Asprintf session name"); |
| 1078 | ret = CMD_ERROR; |
| 1079 | goto error; |
| 1080 | } |
| 1081 | } else { |
| 1082 | /* Generate a name */ |
| 1083 | printed_bytes = asprintf(&base_session_name, DEFAULT_SESSION_NAME "-%s", datetime); |
| 1084 | if (printed_bytes < 0) { |
| 1085 | PERROR("Asprintf session name"); |
| 1086 | ret = CMD_ERROR; |
| 1087 | goto error; |
| 1088 | } |
| 1089 | session_name_date = strdup(base_session_name); |
| 1090 | DBG("Auto session name set to %s", base_session_name); |
| 1091 | } |
| 1092 | |
| 1093 | |
| 1094 | /* |
| 1095 | * Output handling |
| 1096 | */ |
| 1097 | |
| 1098 | /* |
| 1099 | * If any of those options are present clear all output related data. |
| 1100 | */ |
| 1101 | if (opt_output_path || opt_url || (opt_ctrl_url && opt_data_url) || opt_no_output) { |
| 1102 | /* Overwrite output */ |
| 1103 | free(base_url); |
| 1104 | free(base_ctrl_url); |
| 1105 | free(base_data_url); |
| 1106 | base_url = NULL; |
| 1107 | base_ctrl_url = NULL; |
| 1108 | base_data_url = NULL; |
| 1109 | } |
| 1110 | |
| 1111 | if (opt_output_path) { |
| 1112 | |
| 1113 | traces_path = utils_expand_path(opt_output_path); |
| 1114 | if (!traces_path) { |
| 1115 | ret = CMD_ERROR; |
| 1116 | goto error; |
| 1117 | } |
| 1118 | |
| 1119 | /* Create URL string from the local file system path */ |
| 1120 | printed_bytes = asprintf(&temp_url, "file://%s", traces_path); |
| 1121 | if (printed_bytes < 0) { |
| 1122 | PERROR("asprintf url path"); |
| 1123 | ret = CMD_FATAL; |
| 1124 | goto error; |
| 1125 | } |
| 1126 | |
| 1127 | base_url = temp_url; |
| 1128 | } else if (opt_url) { /* Handling URL (-U opt) */ |
| 1129 | base_url = strdup(opt_url); |
| 1130 | } else if (opt_data_url && opt_ctrl_url) { |
| 1131 | /* |
| 1132 | * With both control and data, we'll be setting the consumer URL |
| 1133 | * after session creation thus use no URL. |
| 1134 | */ |
| 1135 | base_ctrl_url = strdup(opt_ctrl_url); |
| 1136 | base_data_url = strdup(opt_data_url); |
| 1137 | } else if (opt_default_output || !(opt_no_output || |
| 1138 | base_output_type == OUTPUT_NONE || base_url || |
| 1139 | base_ctrl_url || base_data_url)) { |
| 1140 | /* Generate default output depending on the session type */ |
| 1141 | switch (base_session_type) { |
| 1142 | case SESSION_NORMAL: |
| 1143 | /* fallthrough */ |
| 1144 | case SESSION_SNAPSHOT: |
| 1145 | /* Default to a local path */ |
| 1146 | tmp_home_path = utils_get_home_dir(); |
| 1147 | if (tmp_home_path == NULL) { |
| 1148 | ERR("HOME path not found.\n \ |
| 1149 | Please specify an output path using -o, --output PATH"); |
| 1150 | ret = CMD_FATAL; |
| 1151 | goto error; |
| 1152 | } |
| 1153 | |
| 1154 | printed_bytes = asprintf(&tmp_url, |
| 1155 | "file://%s/" DEFAULT_TRACE_DIR_NAME "/%s", |
| 1156 | tmp_home_path, session_name_date); |
| 1157 | |
| 1158 | if (printed_bytes < 0) { |
| 1159 | PERROR("asprintf trace dir name"); |
| 1160 | ret = CMD_FATAL; |
| 1161 | goto error; |
| 1162 | } |
| 1163 | |
| 1164 | base_url = tmp_url ; |
| 1165 | break; |
| 1166 | case SESSION_LIVE: |
| 1167 | /* Default to a net output */ |
| 1168 | printed_bytes = asprintf(&tmp_url, "net://127.0.0.1"); |
| 1169 | if (printed_bytes < 0) { |
| 1170 | PERROR("asprintf default live URL"); |
| 1171 | ret = CMD_FATAL; |
| 1172 | goto error; |
| 1173 | } |
| 1174 | base_url = tmp_url ; |
| 1175 | break; |
| 1176 | default: |
| 1177 | ERR("Unknown session type"); |
| 1178 | ret = CMD_FATAL; |
| 1179 | goto error; |
| 1180 | } |
| 1181 | } |
| 1182 | |
| 1183 | /* |
| 1184 | * Shared memory path handling |
| 1185 | */ |
| 1186 | if (opt_shm_path) { |
| 1187 | /* Overwrite shm_path so clear any previously defined one */ |
| 1188 | free(base_shm_path); |
| 1189 | printed_bytes = asprintf(&base_shm_path, "%s/%s", opt_shm_path, session_name_date); |
| 1190 | if (printed_bytes < 0) { |
| 1191 | PERROR("asprintf shm_path"); |
| 1192 | ret = CMD_FATAL; |
| 1193 | goto error; |
| 1194 | } |
| 1195 | } |
| 1196 | |
| 1197 | /* |
| 1198 | * Live timer handling |
| 1199 | */ |
| 1200 | if (opt_live_timer) { |
| 1201 | base_live_timer = opt_live_timer; |
| 1202 | } |
| 1203 | |
| 1204 | /* Get output type from urls */ |
| 1205 | /* TODO: Find a better way of inferring output type */ |
| 1206 | if (base_url) { |
| 1207 | /* Get lttng uris from single url */ |
| 1208 | uri_array_size = uri_parse_str_urls(base_url, NULL, &uris); |
| 1209 | if (uri_array_size < 0) { |
| 1210 | ret = CMD_ERROR; |
| 1211 | goto error; |
| 1212 | } |
| 1213 | } else if (base_ctrl_url && base_data_url) { |
| 1214 | uri_array_size = uri_parse_str_urls(base_ctrl_url, base_data_url, &uris); |
| 1215 | if (uri_array_size < 0) { |
| 1216 | ret = CMD_ERROR; |
| 1217 | goto error; |
| 1218 | } |
| 1219 | } else { |
| 1220 | /* --no-output */ |
| 1221 | uri_array_size = 0; |
| 1222 | } |
| 1223 | |
| 1224 | switch (uri_array_size) { |
| 1225 | case 0: |
| 1226 | base_output_type = OUTPUT_NONE; |
| 1227 | break; |
| 1228 | case 1: |
| 1229 | base_output_type = OUTPUT_LOCAL; |
| 1230 | break; |
| 1231 | case 2: |
| 1232 | base_output_type = OUTPUT_NET; |
| 1233 | break; |
| 1234 | default: |
| 1235 | ret = CMD_ERROR; |
| 1236 | goto error; |
| 1237 | } |
| 1238 | |
| 1239 | if (template) { |
| 1240 | ret = create_session_from_template(template, |
| 1241 | base_session_name, |
| 1242 | base_session_type, |
| 1243 | base_live_timer, |
| 1244 | base_output_type, |
| 1245 | base_url, |
| 1246 | base_ctrl_url, |
| 1247 | base_data_url, |
| 1248 | base_shm_path, |
| 1249 | datetime); |
| 1250 | } else { |
| 1251 | ret = create_session_basic(base_session_name, |
| 1252 | base_session_type, |
| 1253 | base_live_timer, |
| 1254 | base_output_type, |
| 1255 | base_url, |
| 1256 | base_ctrl_url, |
| 1257 | base_data_url, |
| 1258 | base_shm_path, |
| 1259 | datetime); |
| 1260 | } |
| 1261 | if (ret) { |
| 1262 | goto error; |
| 1263 | } |
| 1264 | |
| 1265 | ret = generate_output(base_session_name, |
| 1266 | base_session_type, |
| 1267 | base_live_timer, |
| 1268 | base_output_type, |
| 1269 | base_url, |
| 1270 | base_ctrl_url, |
| 1271 | base_data_url, |
| 1272 | base_shm_path); |
| 1273 | if (ret) { |
| 1274 | goto error; |
| 1275 | } |
| 1276 | |
| 1277 | /* Init lttng session config */ |
| 1278 | ret = config_init(base_session_name); |
| 1279 | if (ret < 0) { |
| 1280 | ret = CMD_ERROR; |
| 1281 | goto error; |
| 1282 | } |
| 1283 | |
| 1284 | ret = CMD_SUCCESS; |
| 1285 | |
| 1286 | error: |
| 1287 | /* Session temp stuff */ |
| 1288 | config_document_free(template); |
| 1289 | free(session_name_date); |
| 1290 | free(uris); |
| 1291 | free(traces_path); |
| 1292 | |
| 1293 | if (ret < 0) { |
| 1294 | ERR("%s", lttng_strerror(ret)); |
| 1295 | } |
| 1296 | |
| 1297 | free(base_session_name); |
| 1298 | free(base_url); |
| 1299 | free(base_ctrl_url); |
| 1300 | free(base_data_url); |
| 1301 | free(base_shm_path); |
| 1302 | return ret; |
| 1303 | } |
| 1304 | |
| 1305 | /* |
| 1306 | * spawn_sessiond |
| 1307 | * |
| 1308 | * Spawn a session daemon by forking and execv. |
| 1309 | */ |
| 1310 | static int spawn_sessiond(char *pathname) |
| 1311 | { |
| 1312 | int ret = 0; |
| 1313 | pid_t pid; |
| 1314 | |
| 1315 | MSG("Spawning a session daemon"); |
| 1316 | pid = fork(); |
| 1317 | if (pid == 0) { |
| 1318 | /* |
| 1319 | * Spawn session daemon in daemon mode. |
| 1320 | */ |
| 1321 | execlp(pathname, "lttng-sessiond", |
| 1322 | "--daemonize", NULL); |
| 1323 | /* execlp only returns if error happened */ |
| 1324 | if (errno == ENOENT) { |
| 1325 | ERR("No session daemon found. Use --sessiond-path."); |
| 1326 | } else { |
| 1327 | PERROR("execlp"); |
| 1328 | } |
| 1329 | kill(getppid(), SIGTERM); /* wake parent */ |
| 1330 | exit(EXIT_FAILURE); |
| 1331 | } else if (pid > 0) { |
| 1332 | /* |
| 1333 | * In daemon mode (--daemonize), sessiond only exits when |
| 1334 | * it's ready to accept commands. |
| 1335 | */ |
| 1336 | for (;;) { |
| 1337 | int status; |
| 1338 | pid_t wait_pid_ret = waitpid(pid, &status, 0); |
| 1339 | |
| 1340 | if (wait_pid_ret < 0) { |
| 1341 | if (errno == EINTR) { |
| 1342 | continue; |
| 1343 | } |
| 1344 | PERROR("waitpid"); |
| 1345 | ret = -errno; |
| 1346 | goto end; |
| 1347 | } |
| 1348 | |
| 1349 | if (WIFSIGNALED(status)) { |
| 1350 | ERR("Session daemon was killed by signal %d", |
| 1351 | WTERMSIG(status)); |
| 1352 | ret = -1; |
| 1353 | goto end; |
| 1354 | } else if (WIFEXITED(status)) { |
| 1355 | DBG("Session daemon terminated normally (exit status: %d)", |
| 1356 | WEXITSTATUS(status)); |
| 1357 | |
| 1358 | if (WEXITSTATUS(status) != 0) { |
| 1359 | ERR("Session daemon terminated with an error (exit status: %d)", |
| 1360 | WEXITSTATUS(status)); |
| 1361 | ret = -1; |
| 1362 | goto end; |
| 1363 | } |
| 1364 | break; |
| 1365 | } |
| 1366 | } |
| 1367 | |
| 1368 | goto end; |
| 1369 | } else { |
| 1370 | PERROR("fork"); |
| 1371 | ret = -1; |
| 1372 | goto end; |
| 1373 | } |
| 1374 | |
| 1375 | end: |
| 1376 | return ret; |
| 1377 | } |
| 1378 | |
| 1379 | /* |
| 1380 | * launch_sessiond |
| 1381 | * |
| 1382 | * Check if the session daemon is available using |
| 1383 | * the liblttngctl API for the check. If not, try to |
| 1384 | * spawn a daemon. |
| 1385 | */ |
| 1386 | static int launch_sessiond(void) |
| 1387 | { |
| 1388 | int ret; |
| 1389 | char *pathname = NULL; |
| 1390 | |
| 1391 | ret = lttng_session_daemon_alive(); |
| 1392 | if (ret) { |
| 1393 | /* Sessiond is alive, not an error */ |
| 1394 | ret = 0; |
| 1395 | goto end; |
| 1396 | } |
| 1397 | |
| 1398 | /* Try command line option path */ |
| 1399 | pathname = opt_sessiond_path; |
| 1400 | |
| 1401 | /* Try LTTNG_SESSIOND_PATH env variable */ |
| 1402 | if (pathname == NULL) { |
| 1403 | pathname = getenv(DEFAULT_SESSIOND_PATH_ENV); |
| 1404 | } |
| 1405 | |
| 1406 | /* Try with configured path */ |
| 1407 | if (pathname == NULL) { |
| 1408 | if (CONFIG_SESSIOND_BIN[0] != '\0') { |
| 1409 | pathname = CONFIG_SESSIOND_BIN; |
| 1410 | } |
| 1411 | } |
| 1412 | |
| 1413 | /* Try the default path */ |
| 1414 | if (pathname == NULL) { |
| 1415 | pathname = INSTALL_BIN_PATH "/lttng-sessiond"; |
| 1416 | } |
| 1417 | |
| 1418 | DBG("Session daemon binary path: %s", pathname); |
| 1419 | |
| 1420 | /* Check existence and permissions */ |
| 1421 | ret = access(pathname, F_OK | X_OK); |
| 1422 | if (ret < 0) { |
| 1423 | ERR("No such file or access denied: %s", pathname); |
| 1424 | goto end; |
| 1425 | } |
| 1426 | |
| 1427 | ret = spawn_sessiond(pathname); |
| 1428 | end: |
| 1429 | if (ret) { |
| 1430 | ERR("Problem occurred while launching session daemon (%s)", |
| 1431 | pathname); |
| 1432 | } |
| 1433 | return ret; |
| 1434 | } |
| 1435 | |
| 1436 | /* |
| 1437 | * The 'create <options>' first level command |
| 1438 | * |
| 1439 | * Returns one of the CMD_* result constants. |
| 1440 | */ |
| 1441 | int cmd_create(int argc, const char **argv) |
| 1442 | { |
| 1443 | int opt, ret = CMD_SUCCESS, command_ret = CMD_SUCCESS, success = 1; |
| 1444 | char *opt_arg = NULL; |
| 1445 | static poptContext pc; |
| 1446 | |
| 1447 | pc = poptGetContext(NULL, argc, argv, long_options, 0); |
| 1448 | poptReadDefaultConfig(pc, 0); |
| 1449 | |
| 1450 | while ((opt = poptGetNextOpt(pc)) != -1) { |
| 1451 | switch (opt) { |
| 1452 | case OPT_HELP: |
| 1453 | SHOW_HELP(); |
| 1454 | goto end; |
| 1455 | case OPT_LIST_OPTIONS: |
| 1456 | list_cmd_options(stdout, long_options); |
| 1457 | goto end; |
| 1458 | case OPT_LIVE_TIMER: |
| 1459 | { |
| 1460 | unsigned long v; |
| 1461 | |
| 1462 | errno = 0; |
| 1463 | opt_arg = poptGetOptArg(pc); |
| 1464 | if (!opt_arg) { |
| 1465 | /* Set up default values. */ |
| 1466 | opt_live_timer = (uint32_t) DEFAULT_LTTNG_LIVE_TIMER; |
| 1467 | DBG("Session live timer interval set to default value %d", |
| 1468 | opt_live_timer); |
| 1469 | break; |
| 1470 | } |
| 1471 | |
| 1472 | v = strtoul(opt_arg, NULL, 0); |
| 1473 | if (errno != 0 || !isdigit(opt_arg[0])) { |
| 1474 | ERR("Wrong value in --live parameter: %s", opt_arg); |
| 1475 | ret = CMD_ERROR; |
| 1476 | goto end; |
| 1477 | } |
| 1478 | if (v != (uint32_t) v) { |
| 1479 | ERR("32-bit overflow in --live parameter: %s", opt_arg); |
| 1480 | ret = CMD_ERROR; |
| 1481 | goto end; |
| 1482 | } |
| 1483 | if (v == 0) { |
| 1484 | ERR("Live timer interval must be greater than zero"); |
| 1485 | ret = CMD_ERROR; |
| 1486 | goto end; |
| 1487 | } |
| 1488 | opt_live_timer = (uint32_t) v; |
| 1489 | DBG("Session live timer interval set to %d", opt_live_timer); |
| 1490 | break; |
| 1491 | } |
| 1492 | case OPT_DEFAULT_NAME: |
| 1493 | opt_default_name = true; |
| 1494 | break; |
| 1495 | case OPT_DEFAULT_OUTPUT: |
| 1496 | opt_default_output = true; |
| 1497 | break; |
| 1498 | default: |
| 1499 | ret = CMD_UNDEFINED; |
| 1500 | goto end; |
| 1501 | } |
| 1502 | } |
| 1503 | |
| 1504 | if (opt_no_consumer) { |
| 1505 | MSG("The option --no-consumer is obsolete. Use --no-output now."); |
| 1506 | ret = CMD_WARNING; |
| 1507 | goto end; |
| 1508 | } |
| 1509 | |
| 1510 | /* Spawn a session daemon if needed */ |
| 1511 | if (!opt_no_sessiond) { |
| 1512 | ret = launch_sessiond(); |
| 1513 | if (ret) { |
| 1514 | ret = CMD_ERROR; |
| 1515 | goto end; |
| 1516 | } |
| 1517 | } |
| 1518 | |
| 1519 | /* MI initialization */ |
| 1520 | if (lttng_opt_mi) { |
| 1521 | writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi); |
| 1522 | if (!writer) { |
| 1523 | ret = -LTTNG_ERR_NOMEM; |
| 1524 | goto end; |
| 1525 | } |
| 1526 | |
| 1527 | /* Open command element */ |
| 1528 | ret = mi_lttng_writer_command_open(writer, |
| 1529 | mi_lttng_element_command_create); |
| 1530 | if (ret) { |
| 1531 | ret = CMD_ERROR; |
| 1532 | goto end; |
| 1533 | } |
| 1534 | |
| 1535 | /* Open output element */ |
| 1536 | ret = mi_lttng_writer_open_element(writer, |
| 1537 | mi_lttng_element_command_output); |
| 1538 | if (ret) { |
| 1539 | ret = CMD_ERROR; |
| 1540 | goto end; |
| 1541 | } |
| 1542 | } |
| 1543 | opt_session_name = (char*) poptGetArg(pc); |
| 1544 | |
| 1545 | command_ret = create_session(); |
| 1546 | |
| 1547 | if (command_ret) { |
| 1548 | success = 0; |
| 1549 | } |
| 1550 | |
| 1551 | if (lttng_opt_mi) { |
| 1552 | /* Close output element */ |
| 1553 | ret = mi_lttng_writer_close_element(writer); |
| 1554 | if (ret) { |
| 1555 | ret = CMD_ERROR; |
| 1556 | goto end; |
| 1557 | } |
| 1558 | |
| 1559 | /* Success ? */ |
| 1560 | ret = mi_lttng_writer_write_element_bool(writer, |
| 1561 | mi_lttng_element_command_success, success); |
| 1562 | if (ret) { |
| 1563 | ret = CMD_ERROR; |
| 1564 | goto end; |
| 1565 | } |
| 1566 | |
| 1567 | /* Command element close */ |
| 1568 | ret = mi_lttng_writer_command_close(writer); |
| 1569 | if (ret) { |
| 1570 | ret = CMD_ERROR; |
| 1571 | goto end; |
| 1572 | } |
| 1573 | } |
| 1574 | |
| 1575 | end: |
| 1576 | /* Mi clean-up */ |
| 1577 | if (writer && mi_lttng_writer_destroy(writer)) { |
| 1578 | /* Preserve original error code */ |
| 1579 | ret = ret ? ret : -LTTNG_ERR_MI_IO_FAIL; |
| 1580 | } |
| 1581 | |
| 1582 | /* Overwrite ret if an error occurred in create_session() */ |
| 1583 | ret = command_ret ? command_ret : ret; |
| 1584 | |
| 1585 | poptFreeContext(pc); |
| 1586 | return ret; |
| 1587 | } |