| 1 | #include <stdio.h> |
| 2 | |
| 3 | #include "../command.h" |
| 4 | #include "../uprobe.h" |
| 5 | |
| 6 | #include "common/argpar/argpar.h" |
| 7 | #include "common/dynamic-array.h" |
| 8 | #include "common/string-utils/string-utils.h" |
| 9 | #include "common/utils.h" |
| 10 | #include "lttng/condition/event-rule.h" |
| 11 | #include "lttng/event-internal.h" |
| 12 | #include <lttng/event-rule/event-rule-internal.h> |
| 13 | #include "lttng/event-rule/kprobe.h" |
| 14 | #include "lttng/event-rule/syscall.h" |
| 15 | #include <lttng/event-rule/tracepoint.h> |
| 16 | #include "lttng/event-rule/uprobe.h" |
| 17 | |
| 18 | #ifdef LTTNG_EMBED_HELP |
| 19 | static const char help_msg[] = |
| 20 | #include <lttng-add-trigger.1.h> |
| 21 | ; |
| 22 | #endif |
| 23 | |
| 24 | enum { |
| 25 | OPT_HELP, |
| 26 | OPT_LIST_OPTIONS, |
| 27 | |
| 28 | OPT_CONDITION, |
| 29 | OPT_ACTION, |
| 30 | OPT_ID, |
| 31 | OPT_FIRE_ONCE_AFTER, |
| 32 | OPT_FIRE_EVERY, |
| 33 | |
| 34 | OPT_ALL, |
| 35 | OPT_FILTER, |
| 36 | OPT_EXCLUDE, |
| 37 | OPT_LOGLEVEL, |
| 38 | OPT_LOGLEVEL_ONLY, |
| 39 | |
| 40 | OPT_USERSPACE, |
| 41 | OPT_KERNEL, |
| 42 | OPT_LOG4J, |
| 43 | OPT_JUL, |
| 44 | OPT_PYTHON, |
| 45 | |
| 46 | OPT_FUNCTION, |
| 47 | OPT_PROBE, |
| 48 | OPT_USERSPACE_PROBE, |
| 49 | OPT_SYSCALL, |
| 50 | OPT_TRACEPOINT, |
| 51 | |
| 52 | OPT_NAME, |
| 53 | OPT_MAX_SIZE, |
| 54 | OPT_DATA_URL, |
| 55 | OPT_CTRL_URL, |
| 56 | }; |
| 57 | |
| 58 | static const struct argpar_opt_descr event_rule_opt_descrs[] = { |
| 59 | { OPT_ALL, 'a', "all", false }, |
| 60 | { OPT_FILTER, 'f', "filter", true }, |
| 61 | { OPT_EXCLUDE, 'x', "exclude", true }, |
| 62 | { OPT_LOGLEVEL, '\0', "loglevel", true }, |
| 63 | { OPT_LOGLEVEL_ONLY, '\0', "loglevel-only", true }, |
| 64 | |
| 65 | /* Domains */ |
| 66 | { OPT_USERSPACE, 'u', "userspace", false }, |
| 67 | { OPT_KERNEL, 'k', "kernel", false }, |
| 68 | { OPT_LOG4J, 'l', "log4j", false }, |
| 69 | { OPT_JUL, 'j', "jul", false }, |
| 70 | { OPT_PYTHON, 'p', "python", false }, |
| 71 | |
| 72 | /* Event rule types */ |
| 73 | { OPT_FUNCTION, '\0', "function", true }, |
| 74 | { OPT_PROBE, '\0', "probe", true }, |
| 75 | { OPT_USERSPACE_PROBE, '\0', "userspace-probe", true }, |
| 76 | { OPT_SYSCALL, '\0', "syscall" }, |
| 77 | { OPT_TRACEPOINT, '\0', "tracepoint" }, |
| 78 | |
| 79 | ARGPAR_OPT_DESCR_SENTINEL |
| 80 | }; |
| 81 | |
| 82 | static |
| 83 | bool assign_domain_type(enum lttng_domain_type *dest, |
| 84 | enum lttng_domain_type src) |
| 85 | { |
| 86 | bool ret; |
| 87 | |
| 88 | if (*dest == LTTNG_DOMAIN_NONE || *dest == src) { |
| 89 | *dest = src; |
| 90 | ret = true; |
| 91 | } else { |
| 92 | fprintf(stderr, "Error: Multiple domains specified.\n"); |
| 93 | ret = false; |
| 94 | } |
| 95 | |
| 96 | return ret; |
| 97 | } |
| 98 | |
| 99 | static |
| 100 | bool assign_event_rule_type(enum lttng_event_rule_type *dest, |
| 101 | enum lttng_event_rule_type src) |
| 102 | { |
| 103 | bool ret; |
| 104 | |
| 105 | if (*dest == LTTNG_EVENT_RULE_TYPE_UNKNOWN || *dest == src) { |
| 106 | *dest = src; |
| 107 | ret = true; |
| 108 | } else { |
| 109 | fprintf(stderr, "Error: Multiple event type not supported.\n"); |
| 110 | ret = false; |
| 111 | } |
| 112 | |
| 113 | return ret; |
| 114 | } |
| 115 | |
| 116 | static |
| 117 | bool assign_string(char **dest, const char *src, const char *opt_name) |
| 118 | { |
| 119 | bool ret; |
| 120 | |
| 121 | if (*dest) { |
| 122 | fprintf(stderr, |
| 123 | "Duplicate %s given.\n", opt_name); |
| 124 | goto error; |
| 125 | } |
| 126 | |
| 127 | *dest = strdup(src); |
| 128 | if (!*dest) { |
| 129 | fprintf(stderr, "Failed to allocate %s string.\n", opt_name); |
| 130 | goto error; |
| 131 | } |
| 132 | |
| 133 | ret = true; |
| 134 | goto end; |
| 135 | |
| 136 | error: |
| 137 | ret = false; |
| 138 | |
| 139 | end: |
| 140 | return ret; |
| 141 | } |
| 142 | |
| 143 | /* This is defined in enable_events.c. */ |
| 144 | LTTNG_HIDDEN |
| 145 | int create_exclusion_list_and_validate(const char *event_name, |
| 146 | const char *exclusions_arg, |
| 147 | char ***exclusion_list); |
| 148 | |
| 149 | /* |
| 150 | * Parse `str` as a log level in domain `domain_type`. Return -1 if the string |
| 151 | * is not recognized as a valid log level. |
| 152 | */ |
| 153 | static |
| 154 | int parse_loglevel_string(const char *str, enum lttng_domain_type domain_type) |
| 155 | { |
| 156 | |
| 157 | switch (domain_type) { |
| 158 | case LTTNG_DOMAIN_UST: |
| 159 | return loglevel_str_to_value(str); |
| 160 | |
| 161 | case LTTNG_DOMAIN_LOG4J: |
| 162 | return loglevel_log4j_str_to_value(str); |
| 163 | |
| 164 | case LTTNG_DOMAIN_JUL: |
| 165 | return loglevel_jul_str_to_value(str); |
| 166 | |
| 167 | case LTTNG_DOMAIN_PYTHON: |
| 168 | return loglevel_python_str_to_value(str); |
| 169 | |
| 170 | default: |
| 171 | /* Invalid domain type. */ |
| 172 | abort(); |
| 173 | } |
| 174 | } |
| 175 | |
| 176 | static |
| 177 | struct lttng_event_rule *parse_event_rule(int *argc, const char ***argv) |
| 178 | { |
| 179 | struct lttng_event_rule *er = NULL; |
| 180 | enum lttng_domain_type domain_type = LTTNG_DOMAIN_NONE; |
| 181 | enum lttng_event_rule_type event_rule_type = LTTNG_EVENT_RULE_TYPE_UNKNOWN; |
| 182 | struct argpar_state *state; |
| 183 | struct argpar_item *item = NULL; |
| 184 | char *error = NULL; |
| 185 | int consumed_args = -1; |
| 186 | struct lttng_userspace_probe_location *userspace_probe_location = NULL; |
| 187 | |
| 188 | /* Was the -a/--all flag provided? */ |
| 189 | bool all_events = false; |
| 190 | |
| 191 | /* Tracepoint name (non-option argument) */ |
| 192 | const char *tracepoint_name = NULL; |
| 193 | |
| 194 | /* Holds the argument of --probe / --userspace-probe. */ |
| 195 | char *source = NULL; |
| 196 | |
| 197 | /* Filter */ |
| 198 | char *filter = NULL; |
| 199 | |
| 200 | /* Exclude */ |
| 201 | char *exclude = NULL; |
| 202 | char **exclusion_list = NULL; |
| 203 | |
| 204 | /* Log level */ |
| 205 | char *loglevel_str = NULL; |
| 206 | bool loglevel_only = false; |
| 207 | |
| 208 | state = argpar_state_create(*argc, *argv, event_rule_opt_descrs); |
| 209 | if (!state) { |
| 210 | fprintf(stderr, "Failed to allocate an argpar state.\n"); |
| 211 | goto error; |
| 212 | } |
| 213 | |
| 214 | while (true) { |
| 215 | enum argpar_state_parse_next_status status; |
| 216 | |
| 217 | ARGPAR_ITEM_DESTROY_AND_RESET(item); |
| 218 | status = argpar_state_parse_next(state, &item, &error); |
| 219 | if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR) { |
| 220 | fprintf(stderr, "Error: %s\n", error); |
| 221 | goto error; |
| 222 | } else if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR_UNKNOWN_OPT) { |
| 223 | /* Just stop parsing here. */ |
| 224 | break; |
| 225 | } else if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_END) { |
| 226 | break; |
| 227 | } |
| 228 | |
| 229 | assert(status == ARGPAR_STATE_PARSE_NEXT_STATUS_OK); |
| 230 | |
| 231 | if (item->type == ARGPAR_ITEM_TYPE_OPT) { |
| 232 | struct argpar_item_opt *item_opt = |
| 233 | (struct argpar_item_opt *) item; |
| 234 | |
| 235 | switch (item_opt->descr->id) { |
| 236 | /* Domains */ |
| 237 | case OPT_USERSPACE: |
| 238 | if (!assign_domain_type(&domain_type, LTTNG_DOMAIN_UST)) { |
| 239 | goto error; |
| 240 | } |
| 241 | break; |
| 242 | |
| 243 | case OPT_KERNEL: |
| 244 | if (!assign_domain_type(&domain_type, LTTNG_DOMAIN_KERNEL)) { |
| 245 | goto error; |
| 246 | } |
| 247 | break; |
| 248 | |
| 249 | case OPT_LOG4J: |
| 250 | if (!assign_domain_type(&domain_type, LTTNG_DOMAIN_LOG4J)) { |
| 251 | goto error; |
| 252 | } |
| 253 | break; |
| 254 | |
| 255 | case OPT_JUL: |
| 256 | if (!assign_domain_type(&domain_type, LTTNG_DOMAIN_JUL)) { |
| 257 | goto error; |
| 258 | } |
| 259 | break; |
| 260 | |
| 261 | case OPT_PYTHON: |
| 262 | if (!assign_domain_type(&domain_type, LTTNG_DOMAIN_PYTHON)) { |
| 263 | goto error; |
| 264 | } |
| 265 | break; |
| 266 | |
| 267 | /* Event rule types */ |
| 268 | case OPT_FUNCTION: |
| 269 | if (!assign_event_rule_type(&event_rule_type, |
| 270 | LTTNG_EVENT_RULE_TYPE_KRETPROBE)) { |
| 271 | goto error; |
| 272 | } |
| 273 | break; |
| 274 | |
| 275 | case OPT_PROBE: |
| 276 | if (!assign_event_rule_type(&event_rule_type, |
| 277 | LTTNG_EVENT_RULE_TYPE_KPROBE)) { |
| 278 | goto error; |
| 279 | } |
| 280 | |
| 281 | if (!assign_string(&source, item_opt->arg, "source")) { |
| 282 | goto error; |
| 283 | } |
| 284 | |
| 285 | break; |
| 286 | |
| 287 | case OPT_USERSPACE_PROBE: |
| 288 | if (!assign_event_rule_type(&event_rule_type, |
| 289 | LTTNG_EVENT_RULE_TYPE_UPROBE)) { |
| 290 | goto error; |
| 291 | } |
| 292 | |
| 293 | if (!assign_string(&source, item_opt->arg, "source")) { |
| 294 | goto error; |
| 295 | } |
| 296 | break; |
| 297 | |
| 298 | case OPT_SYSCALL: |
| 299 | if (!assign_event_rule_type(&event_rule_type, |
| 300 | LTTNG_EVENT_RULE_TYPE_SYSCALL)) { |
| 301 | goto error; |
| 302 | } |
| 303 | break; |
| 304 | |
| 305 | case OPT_TRACEPOINT: |
| 306 | if (!assign_event_rule_type(&event_rule_type, |
| 307 | LTTNG_EVENT_RULE_TYPE_TRACEPOINT)) { |
| 308 | goto error; |
| 309 | } |
| 310 | break; |
| 311 | |
| 312 | case OPT_ALL: |
| 313 | all_events = true; |
| 314 | break; |
| 315 | |
| 316 | case OPT_FILTER: |
| 317 | if (!assign_string(&filter, item_opt->arg, "--filter/-f")) { |
| 318 | goto error; |
| 319 | } |
| 320 | break; |
| 321 | |
| 322 | case OPT_EXCLUDE: |
| 323 | if (!assign_string(&exclude, item_opt->arg, "--exclude/-x")) { |
| 324 | goto error; |
| 325 | } |
| 326 | break; |
| 327 | |
| 328 | case OPT_LOGLEVEL: |
| 329 | case OPT_LOGLEVEL_ONLY: |
| 330 | if (!assign_string(&loglevel_str, item_opt->arg, "--loglevel/--loglevel-only")) { |
| 331 | goto error; |
| 332 | } |
| 333 | |
| 334 | loglevel_only = item_opt->descr->id == OPT_LOGLEVEL_ONLY; |
| 335 | break; |
| 336 | |
| 337 | default: |
| 338 | abort(); |
| 339 | } |
| 340 | } else { |
| 341 | struct argpar_item_non_opt *item_non_opt = |
| 342 | (struct argpar_item_non_opt *) item; |
| 343 | |
| 344 | /* |
| 345 | * Don't accept two non-option arguments/tracepoint |
| 346 | * names. |
| 347 | */ |
| 348 | if (tracepoint_name) { |
| 349 | fprintf(stderr, |
| 350 | "Error: Unexpected argument: %s\n", |
| 351 | item_non_opt->arg); |
| 352 | goto error; |
| 353 | } |
| 354 | |
| 355 | tracepoint_name = item_non_opt->arg; |
| 356 | } |
| 357 | } |
| 358 | |
| 359 | if (event_rule_type == LTTNG_EVENT_RULE_TYPE_UNKNOWN) { |
| 360 | event_rule_type = LTTNG_EVENT_RULE_TYPE_TRACEPOINT; |
| 361 | } |
| 362 | |
| 363 | /* |
| 364 | * Option -a is applicable to event rules of type tracepoint and |
| 365 | * syscall, and it is equivalent to using "*" as the tracepoint name. |
| 366 | */ |
| 367 | if (all_events) { |
| 368 | switch (event_rule_type) { |
| 369 | case LTTNG_EVENT_RULE_TYPE_TRACEPOINT: |
| 370 | case LTTNG_EVENT_RULE_TYPE_SYSCALL: |
| 371 | break; |
| 372 | default: |
| 373 | fprintf(stderr, "Error: Can't use -a/--all with event rule of type %s.\n", |
| 374 | lttng_event_rule_type_str(event_rule_type)); |
| 375 | goto error; |
| 376 | } |
| 377 | |
| 378 | if (tracepoint_name) { |
| 379 | fprintf(stderr, "Error: Can't provide a tracepoint name with -a/--all.\n"); |
| 380 | goto error; |
| 381 | } |
| 382 | |
| 383 | /* In which case, it's equivalent to tracepoint name "*". */ |
| 384 | tracepoint_name = "*"; |
| 385 | } |
| 386 | |
| 387 | /* |
| 388 | * A tracepoint name (or -a, for the event rule types that accept it) |
| 389 | * is required. |
| 390 | */ |
| 391 | if (!tracepoint_name) { |
| 392 | fprintf(stderr, "Error: Need to provide either a tracepoint name or -a/--all.\n"); |
| 393 | goto error; |
| 394 | } |
| 395 | |
| 396 | /* |
| 397 | * We don't support multiple tracepoint names for now. |
| 398 | */ |
| 399 | if (strchr(tracepoint_name, ',')) { |
| 400 | fprintf(stderr, "Error: multiple tracepoint names are not supported at the moment.\n"); |
| 401 | goto error; |
| 402 | } |
| 403 | |
| 404 | /* |
| 405 | * Update *argc and *argv so our caller can keep parsing what follows. |
| 406 | */ |
| 407 | consumed_args = argpar_state_get_ingested_orig_args(state); |
| 408 | assert(consumed_args >= 0); |
| 409 | *argc -= consumed_args; |
| 410 | *argv += consumed_args; |
| 411 | |
| 412 | /* Need to specify a domain. */ |
| 413 | if (domain_type == LTTNG_DOMAIN_NONE) { |
| 414 | fprintf(stderr, "Error: Please specify a domain (-k/-u/-j).\n"); |
| 415 | goto error; |
| 416 | } |
| 417 | |
| 418 | /* Validate event rule type against domain. */ |
| 419 | switch (event_rule_type) { |
| 420 | case LTTNG_EVENT_RULE_TYPE_KPROBE: |
| 421 | case LTTNG_EVENT_RULE_TYPE_KRETPROBE: |
| 422 | case LTTNG_EVENT_RULE_TYPE_UPROBE: |
| 423 | case LTTNG_EVENT_RULE_TYPE_SYSCALL: |
| 424 | if (domain_type != LTTNG_DOMAIN_KERNEL) { |
| 425 | fprintf(stderr, "Error: Event type not available for user-space tracing\n"); |
| 426 | goto error; |
| 427 | } |
| 428 | break; |
| 429 | |
| 430 | case LTTNG_EVENT_RULE_TYPE_TRACEPOINT: |
| 431 | break; |
| 432 | |
| 433 | default: |
| 434 | abort(); |
| 435 | } |
| 436 | |
| 437 | /* |
| 438 | * Adding a filter to a probe, function or userspace-probe would be |
| 439 | * denied by the kernel tracer as it's not supported at the moment. We |
| 440 | * do an early check here to warn the user. |
| 441 | */ |
| 442 | if (filter && domain_type == LTTNG_DOMAIN_KERNEL) { |
| 443 | switch (event_rule_type) { |
| 444 | case LTTNG_EVENT_RULE_TYPE_TRACEPOINT: |
| 445 | case LTTNG_EVENT_RULE_TYPE_SYSCALL: |
| 446 | break; |
| 447 | default: |
| 448 | ERR("Filter expressions are not supported for %s events", |
| 449 | lttng_event_rule_type_str(event_rule_type)); |
| 450 | goto error; |
| 451 | } |
| 452 | } |
| 453 | |
| 454 | /* If --exclude/-x was passed, split it into an exclusion list. */ |
| 455 | if (exclude) { |
| 456 | if (domain_type != LTTNG_DOMAIN_UST) { |
| 457 | fprintf(stderr, "Event name exclusions are not yet implemented for %s events", |
| 458 | get_domain_str(domain_type)); |
| 459 | goto error; |
| 460 | } |
| 461 | |
| 462 | |
| 463 | if (create_exclusion_list_and_validate(tracepoint_name, exclude, |
| 464 | &exclusion_list) != 0) { |
| 465 | fprintf(stderr, "Failed to create exclusion list.\n"); |
| 466 | goto error; |
| 467 | } |
| 468 | } |
| 469 | |
| 470 | if (loglevel_str && event_rule_type != LTTNG_EVENT_RULE_TYPE_TRACEPOINT) { |
| 471 | fprintf(stderr, "Log levels are only application to tracepoint event rules.\n"); |
| 472 | goto error; |
| 473 | } |
| 474 | |
| 475 | /* Finally, create the event rule object. */ |
| 476 | switch (event_rule_type) { |
| 477 | case LTTNG_EVENT_RULE_TYPE_TRACEPOINT: |
| 478 | { |
| 479 | enum lttng_event_rule_status event_rule_status; |
| 480 | |
| 481 | er = lttng_event_rule_tracepoint_create(domain_type); |
| 482 | if (!er) { |
| 483 | fprintf(stderr, "Failed to create tracepoint event rule.\n"); |
| 484 | goto error; |
| 485 | } |
| 486 | |
| 487 | /* Set pattern. */ |
| 488 | event_rule_status = |
| 489 | lttng_event_rule_tracepoint_set_pattern(er, tracepoint_name); |
| 490 | if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) { |
| 491 | fprintf(stderr, "Failed to set tracepoint pattern.\n"); |
| 492 | goto error; |
| 493 | } |
| 494 | |
| 495 | /* Set filter. */ |
| 496 | if (filter) { |
| 497 | event_rule_status = |
| 498 | lttng_event_rule_tracepoint_set_filter( |
| 499 | er, filter); |
| 500 | if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) { |
| 501 | fprintf(stderr, "Failed to set tracepoint filter expression.\n"); |
| 502 | goto error; |
| 503 | } |
| 504 | } |
| 505 | |
| 506 | /* Set exclusion list. */ |
| 507 | if (exclusion_list) { |
| 508 | int n; |
| 509 | |
| 510 | /* Count number of items in exclusion list. */ |
| 511 | for (n = 0; exclusion_list[n]; n++); |
| 512 | |
| 513 | event_rule_status = |
| 514 | lttng_event_rule_tracepoint_set_exclusions(er, |
| 515 | n, (const char **) exclusion_list); |
| 516 | if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) { |
| 517 | fprintf(stderr, "Failed to set tracepoint exclusion list.\n"); |
| 518 | goto error; |
| 519 | } |
| 520 | } |
| 521 | |
| 522 | if (loglevel_str) { |
| 523 | int loglevel; |
| 524 | |
| 525 | if (domain_type == LTTNG_DOMAIN_KERNEL) { |
| 526 | fprintf(stderr, "Log levels are not supported by the kernel tracer.\n"); |
| 527 | goto error; |
| 528 | } |
| 529 | |
| 530 | loglevel = parse_loglevel_string( |
| 531 | loglevel_str, domain_type); |
| 532 | if (loglevel < 0) { |
| 533 | fprintf(stderr, "Failed to parse `%s` as a log level.\n", loglevel_str); |
| 534 | goto error; |
| 535 | } |
| 536 | |
| 537 | if (loglevel_only) { |
| 538 | event_rule_status = |
| 539 | lttng_event_rule_tracepoint_set_loglevel( |
| 540 | er, loglevel); |
| 541 | } else { |
| 542 | event_rule_status = |
| 543 | lttng_event_rule_tracepoint_set_loglevel_range( |
| 544 | er, loglevel); |
| 545 | } |
| 546 | |
| 547 | if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) { |
| 548 | fprintf(stderr, "Failed to set log level.\n"); |
| 549 | goto error; |
| 550 | } |
| 551 | } |
| 552 | |
| 553 | break; |
| 554 | } |
| 555 | |
| 556 | case LTTNG_EVENT_RULE_TYPE_KPROBE: |
| 557 | { |
| 558 | enum lttng_event_rule_status event_rule_status; |
| 559 | |
| 560 | er = lttng_event_rule_kprobe_create(); |
| 561 | if (!er) { |
| 562 | fprintf(stderr, "Failed to create kprobe event rule.\n"); |
| 563 | goto error; |
| 564 | } |
| 565 | |
| 566 | event_rule_status = lttng_event_rule_kprobe_set_name(er, tracepoint_name); |
| 567 | if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) { |
| 568 | fprintf(stderr, "Failed to set kprobe event rule's name.\n"); |
| 569 | goto error; |
| 570 | } |
| 571 | |
| 572 | assert(source); |
| 573 | event_rule_status = lttng_event_rule_kprobe_set_source(er, source); |
| 574 | if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) { |
| 575 | fprintf(stderr, "Failed to set kprobe event rule's source.\n"); |
| 576 | goto error; |
| 577 | } |
| 578 | |
| 579 | break; |
| 580 | } |
| 581 | |
| 582 | case LTTNG_EVENT_RULE_TYPE_UPROBE: |
| 583 | { |
| 584 | int ret; |
| 585 | enum lttng_event_rule_status event_rule_status; |
| 586 | |
| 587 | ret = parse_userspace_probe_opts(source, &userspace_probe_location); |
| 588 | if (ret) { |
| 589 | fprintf(stderr, "Failed to parse userspace probe location.\n"); |
| 590 | goto error; |
| 591 | } |
| 592 | |
| 593 | er = lttng_event_rule_uprobe_create(); |
| 594 | if (!er) { |
| 595 | fprintf(stderr, "Failed to create userspace probe event rule.\n"); |
| 596 | goto error; |
| 597 | } |
| 598 | |
| 599 | event_rule_status = lttng_event_rule_uprobe_set_location(er, userspace_probe_location); |
| 600 | if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) { |
| 601 | fprintf(stderr, "Failed to set userspace probe event rule's location.\n"); |
| 602 | goto error; |
| 603 | } |
| 604 | |
| 605 | event_rule_status = lttng_event_rule_uprobe_set_name(er, tracepoint_name); |
| 606 | if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) { |
| 607 | fprintf(stderr, "Failed to set userspace probe event rule's name.\n"); |
| 608 | goto error; |
| 609 | } |
| 610 | |
| 611 | break; |
| 612 | } |
| 613 | |
| 614 | case LTTNG_EVENT_RULE_TYPE_SYSCALL: |
| 615 | { |
| 616 | enum lttng_event_rule_status event_rule_status; |
| 617 | |
| 618 | er = lttng_event_rule_syscall_create(); |
| 619 | if (!er) { |
| 620 | fprintf(stderr, "Failed to create syscall event rule.\n"); |
| 621 | goto error; |
| 622 | } |
| 623 | |
| 624 | event_rule_status = lttng_event_rule_syscall_set_pattern(er, tracepoint_name); |
| 625 | if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) { |
| 626 | fprintf(stderr, "Failed to set syscall event rule's pattern.\n"); |
| 627 | goto error; |
| 628 | } |
| 629 | |
| 630 | if (filter) { |
| 631 | event_rule_status = lttng_event_rule_syscall_set_filter( |
| 632 | er, filter); |
| 633 | if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) { |
| 634 | fprintf(stderr, "Failed to set syscall event rule's filter expression.\n"); |
| 635 | goto error; |
| 636 | } |
| 637 | } |
| 638 | |
| 639 | break; |
| 640 | } |
| 641 | |
| 642 | default: |
| 643 | fprintf(stderr, "%s: I don't support event rules of type `%s` at the moment.\n", __func__, |
| 644 | lttng_event_rule_type_str(event_rule_type)); |
| 645 | goto error; |
| 646 | } |
| 647 | |
| 648 | goto end; |
| 649 | |
| 650 | error: |
| 651 | lttng_event_rule_destroy(er); |
| 652 | er = NULL; |
| 653 | |
| 654 | end: |
| 655 | argpar_item_destroy(item); |
| 656 | free(error); |
| 657 | argpar_state_destroy(state); |
| 658 | free(filter); |
| 659 | free(exclude); |
| 660 | free(loglevel_str); |
| 661 | strutils_free_null_terminated_array_of_strings(exclusion_list); |
| 662 | lttng_userspace_probe_location_destroy(userspace_probe_location); |
| 663 | return er; |
| 664 | } |
| 665 | |
| 666 | static |
| 667 | struct lttng_condition *handle_condition_event(int *argc, const char ***argv) |
| 668 | { |
| 669 | struct lttng_event_rule *er; |
| 670 | struct lttng_condition *c; |
| 671 | |
| 672 | er = parse_event_rule(argc, argv); |
| 673 | if (!er) { |
| 674 | c = NULL; |
| 675 | goto end; |
| 676 | } |
| 677 | |
| 678 | c = lttng_condition_event_rule_create(er); |
| 679 | if (!c) { |
| 680 | goto end; |
| 681 | } |
| 682 | |
| 683 | end: |
| 684 | return c; |
| 685 | } |
| 686 | |
| 687 | static |
| 688 | struct lttng_condition *handle_condition_session_consumed_size(int *argc, const char ***argv) |
| 689 | { |
| 690 | struct lttng_condition *cond = NULL; |
| 691 | struct argpar_state *state = NULL; |
| 692 | struct argpar_item *item = NULL; |
| 693 | const char *threshold_arg = NULL; |
| 694 | const char *session_name_arg = NULL; |
| 695 | uint64_t threshold; |
| 696 | char *error = NULL; |
| 697 | enum lttng_condition_status condition_status; |
| 698 | |
| 699 | state = argpar_state_create(*argc, *argv, event_rule_opt_descrs); |
| 700 | if (!state) { |
| 701 | fprintf(stderr, "Failed to allocate an argpar state.\n"); |
| 702 | goto error; |
| 703 | } |
| 704 | |
| 705 | while (true) { |
| 706 | enum argpar_state_parse_next_status status; |
| 707 | |
| 708 | ARGPAR_ITEM_DESTROY_AND_RESET(item); |
| 709 | status = argpar_state_parse_next(state, &item, &error); |
| 710 | if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR) { |
| 711 | fprintf(stderr, "Error: %s\n", error); |
| 712 | goto error; |
| 713 | } else if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR_UNKNOWN_OPT) { |
| 714 | /* Just stop parsing here. */ |
| 715 | break; |
| 716 | } else if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_END) { |
| 717 | break; |
| 718 | } |
| 719 | |
| 720 | assert(status == ARGPAR_STATE_PARSE_NEXT_STATUS_OK); |
| 721 | |
| 722 | if (item->type == ARGPAR_ITEM_TYPE_OPT) { |
| 723 | struct argpar_item_opt *item_opt = |
| 724 | (struct argpar_item_opt *) item; |
| 725 | |
| 726 | switch (item_opt->descr->id) { |
| 727 | default: |
| 728 | abort(); |
| 729 | } |
| 730 | } else { |
| 731 | struct argpar_item_non_opt *item_non_opt; |
| 732 | |
| 733 | assert(item->type == ARGPAR_ITEM_TYPE_NON_OPT); |
| 734 | |
| 735 | item_non_opt = (struct argpar_item_non_opt *) item; |
| 736 | |
| 737 | switch (item_non_opt->non_opt_index) { |
| 738 | case 0: |
| 739 | session_name_arg = item_non_opt->arg; |
| 740 | break; |
| 741 | case 1: |
| 742 | threshold_arg = item_non_opt->arg; |
| 743 | break; |
| 744 | default: |
| 745 | fprintf(stderr, "Unexpected argument `%s`.\n", |
| 746 | item_non_opt->arg); |
| 747 | goto error; |
| 748 | } |
| 749 | } |
| 750 | } |
| 751 | |
| 752 | *argc -= argpar_state_get_ingested_orig_args(state); |
| 753 | *argv += argpar_state_get_ingested_orig_args(state); |
| 754 | |
| 755 | if (!session_name_arg) { |
| 756 | fprintf(stderr, "Missing session name argument.\n"); |
| 757 | goto error; |
| 758 | } |
| 759 | |
| 760 | if (!threshold_arg) { |
| 761 | fprintf(stderr, "Missing threshold argument.\n"); |
| 762 | goto error; |
| 763 | } |
| 764 | |
| 765 | if (utils_parse_size_suffix(threshold_arg, &threshold) != 0) { |
| 766 | fprintf(stderr, "Failed to parse `%s` as a size.\n", threshold_arg); |
| 767 | goto error; |
| 768 | } |
| 769 | |
| 770 | cond = lttng_condition_session_consumed_size_create(); |
| 771 | if (!cond) { |
| 772 | fprintf(stderr, "Failed to allocate a session consumed size condition.\n"); |
| 773 | goto error; |
| 774 | } |
| 775 | |
| 776 | condition_status = lttng_condition_session_consumed_size_set_session_name( |
| 777 | cond, session_name_arg); |
| 778 | if (condition_status != LTTNG_CONDITION_STATUS_OK) { |
| 779 | fprintf(stderr, "Failed to set session consumed size condition session name.\n"); |
| 780 | goto error; |
| 781 | } |
| 782 | |
| 783 | |
| 784 | condition_status = lttng_condition_session_consumed_size_set_threshold( |
| 785 | cond, threshold); |
| 786 | if (condition_status != LTTNG_CONDITION_STATUS_OK) { |
| 787 | fprintf(stderr, "Failed to set session consumed size condition threshold.\n"); |
| 788 | goto error; |
| 789 | } |
| 790 | |
| 791 | goto end; |
| 792 | |
| 793 | error: |
| 794 | lttng_condition_destroy(cond); |
| 795 | cond = NULL; |
| 796 | |
| 797 | end: |
| 798 | argpar_state_destroy(state); |
| 799 | argpar_item_destroy(item); |
| 800 | free(error); |
| 801 | return cond; |
| 802 | } |
| 803 | |
| 804 | static |
| 805 | struct lttng_condition *handle_condition_buffer_usage_high(int *argc, const char ***argv) |
| 806 | { |
| 807 | struct lttng_condition *cond = NULL; |
| 808 | struct argpar_state *state = NULL; |
| 809 | struct argpar_item *item = NULL; |
| 810 | const char *threshold_arg = NULL; |
| 811 | const char *session_name_arg = NULL; |
| 812 | uint64_t threshold; |
| 813 | char *error = NULL; |
| 814 | enum lttng_condition_status condition_status; |
| 815 | |
| 816 | state = argpar_state_create(*argc, *argv, event_rule_opt_descrs); |
| 817 | if (!state) { |
| 818 | fprintf(stderr, "Failed to allocate an argpar state.\n"); |
| 819 | goto error; |
| 820 | } |
| 821 | |
| 822 | while (true) { |
| 823 | enum argpar_state_parse_next_status status; |
| 824 | |
| 825 | ARGPAR_ITEM_DESTROY_AND_RESET(item); |
| 826 | status = argpar_state_parse_next(state, &item, &error); |
| 827 | if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR) { |
| 828 | fprintf(stderr, "Error: %s\n", error); |
| 829 | goto error; |
| 830 | } else if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR_UNKNOWN_OPT) { |
| 831 | /* Just stop parsing here. */ |
| 832 | break; |
| 833 | } else if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_END) { |
| 834 | break; |
| 835 | } |
| 836 | |
| 837 | assert(status == ARGPAR_STATE_PARSE_NEXT_STATUS_OK); |
| 838 | |
| 839 | if (item->type == ARGPAR_ITEM_TYPE_OPT) { |
| 840 | struct argpar_item_opt *item_opt = |
| 841 | (struct argpar_item_opt *) item; |
| 842 | |
| 843 | switch (item_opt->descr->id) { |
| 844 | default: |
| 845 | abort(); |
| 846 | } |
| 847 | } else { |
| 848 | struct argpar_item_non_opt *item_non_opt; |
| 849 | |
| 850 | assert(item->type == ARGPAR_ITEM_TYPE_NON_OPT); |
| 851 | |
| 852 | item_non_opt = (struct argpar_item_non_opt *) item; |
| 853 | |
| 854 | switch (item_non_opt->non_opt_index) { |
| 855 | case 0: |
| 856 | session_name_arg = item_non_opt->arg; |
| 857 | break; |
| 858 | case 1: |
| 859 | threshold_arg = item_non_opt->arg; |
| 860 | break; |
| 861 | default: |
| 862 | fprintf(stderr, "Unexpected argument `%s`.\n", |
| 863 | item_non_opt->arg); |
| 864 | goto error; |
| 865 | } |
| 866 | } |
| 867 | } |
| 868 | |
| 869 | *argc -= argpar_state_get_ingested_orig_args(state); |
| 870 | *argv += argpar_state_get_ingested_orig_args(state); |
| 871 | |
| 872 | if (!session_name_arg) { |
| 873 | fprintf(stderr, "Missing session name argument.\n"); |
| 874 | goto error; |
| 875 | } |
| 876 | |
| 877 | if (!threshold_arg) { |
| 878 | fprintf(stderr, "Missing threshold argument.\n"); |
| 879 | goto error; |
| 880 | } |
| 881 | |
| 882 | if (utils_parse_size_suffix(threshold_arg, &threshold) != 0) { |
| 883 | fprintf(stderr, "Failed to parse `%s` as a size.\n", threshold_arg); |
| 884 | goto error; |
| 885 | } |
| 886 | |
| 887 | cond = lttng_condition_session_consumed_size_create(); |
| 888 | if (!cond) { |
| 889 | fprintf(stderr, "Failed to allocate a session consumed size condition.\n"); |
| 890 | goto error; |
| 891 | } |
| 892 | |
| 893 | condition_status = lttng_condition_session_consumed_size_set_session_name( |
| 894 | cond, session_name_arg); |
| 895 | if (condition_status != LTTNG_CONDITION_STATUS_OK) { |
| 896 | fprintf(stderr, "Failed to set session consumed size condition session name.\n"); |
| 897 | goto error; |
| 898 | } |
| 899 | |
| 900 | condition_status = lttng_condition_session_consumed_size_set_threshold( |
| 901 | cond, threshold); |
| 902 | if (condition_status != LTTNG_CONDITION_STATUS_OK) { |
| 903 | fprintf(stderr, "Failed to set session consumed size condition threshold.\n"); |
| 904 | goto error; |
| 905 | } |
| 906 | |
| 907 | goto end; |
| 908 | |
| 909 | error: |
| 910 | lttng_condition_destroy(cond); |
| 911 | cond = NULL; |
| 912 | |
| 913 | end: |
| 914 | argpar_state_destroy(state); |
| 915 | argpar_item_destroy(item); |
| 916 | free(error); |
| 917 | return cond; |
| 918 | } |
| 919 | |
| 920 | static |
| 921 | struct lttng_condition *handle_condition_buffer_usage_low(int *argc, const char ***argv) |
| 922 | { |
| 923 | return NULL; |
| 924 | } |
| 925 | |
| 926 | static |
| 927 | struct lttng_condition *handle_condition_session_rotation_ongoing(int *argc, const char ***argv) |
| 928 | { |
| 929 | return NULL; |
| 930 | } |
| 931 | |
| 932 | static |
| 933 | struct lttng_condition *handle_condition_session_rotation_completed(int *argc, const char ***argv) |
| 934 | { |
| 935 | return NULL; |
| 936 | } |
| 937 | |
| 938 | struct condition_descr { |
| 939 | const char *name; |
| 940 | struct lttng_condition *(*handler) (int *argc, const char ***argv); |
| 941 | }; |
| 942 | |
| 943 | static const |
| 944 | struct condition_descr condition_descrs[] = { |
| 945 | { "on-event", handle_condition_event }, |
| 946 | { "on-session-consumed-size", handle_condition_session_consumed_size }, |
| 947 | { "on-buffer-usage-high", handle_condition_buffer_usage_high }, |
| 948 | { "on-buffer-usage-low", handle_condition_buffer_usage_low }, |
| 949 | { "on-session-rotation-ongoing", handle_condition_session_rotation_ongoing }, |
| 950 | { "on-session-rotation-completed", handle_condition_session_rotation_completed }, |
| 951 | }; |
| 952 | |
| 953 | static |
| 954 | struct lttng_condition *parse_condition(int *argc, const char ***argv) |
| 955 | { |
| 956 | int i; |
| 957 | struct lttng_condition *cond; |
| 958 | const char *condition_name; |
| 959 | const struct condition_descr *descr = NULL; |
| 960 | |
| 961 | if (*argc == 0) { |
| 962 | fprintf(stderr, "Missing condition name.\n"); |
| 963 | goto error; |
| 964 | } |
| 965 | |
| 966 | condition_name = (*argv)[0]; |
| 967 | |
| 968 | (*argc)--; |
| 969 | (*argv)++; |
| 970 | |
| 971 | for (i = 0; i < ARRAY_SIZE(condition_descrs); i++) { |
| 972 | if (strcmp(condition_name, condition_descrs[i].name) == 0) { |
| 973 | descr = &condition_descrs[i]; |
| 974 | break; |
| 975 | } |
| 976 | } |
| 977 | |
| 978 | if (!descr) { |
| 979 | fprintf(stderr, "Unknown condition name: %s\n", condition_name); |
| 980 | goto error; |
| 981 | } |
| 982 | |
| 983 | cond = descr->handler(argc, argv); |
| 984 | if (!cond) { |
| 985 | /* The handler has already printed an error message. */ |
| 986 | goto error; |
| 987 | } |
| 988 | |
| 989 | goto end; |
| 990 | error: |
| 991 | cond = NULL; |
| 992 | end: |
| 993 | return cond; |
| 994 | } |
| 995 | |
| 996 | |
| 997 | static |
| 998 | struct lttng_action *handle_action_notify(int *argc, const char ***argv) |
| 999 | { |
| 1000 | return lttng_action_notify_create(); |
| 1001 | } |
| 1002 | |
| 1003 | static const struct argpar_opt_descr no_opt_descrs[] = { |
| 1004 | ARGPAR_OPT_DESCR_SENTINEL |
| 1005 | }; |
| 1006 | |
| 1007 | /* |
| 1008 | * Generic handler for a kind of action that takes a session name as its sole |
| 1009 | * argument. |
| 1010 | */ |
| 1011 | |
| 1012 | static |
| 1013 | struct lttng_action *handle_action_simple_session( |
| 1014 | int *argc, const char ***argv, |
| 1015 | struct lttng_action *(*create_action_cb)(void), |
| 1016 | enum lttng_action_status (*set_session_name_cb)(struct lttng_action *, const char *), |
| 1017 | const char *action_name) |
| 1018 | { |
| 1019 | struct lttng_action *action = NULL; |
| 1020 | struct argpar_state *state = NULL; |
| 1021 | struct argpar_item *item = NULL; |
| 1022 | const char *session_name_arg = NULL; |
| 1023 | char *error = NULL; |
| 1024 | enum lttng_action_status action_status; |
| 1025 | |
| 1026 | state = argpar_state_create(*argc, *argv, no_opt_descrs); |
| 1027 | if (!state) { |
| 1028 | fprintf(stderr, "Failed to allocate an argpar state.\n"); |
| 1029 | goto error; |
| 1030 | } |
| 1031 | |
| 1032 | while (true) { |
| 1033 | enum argpar_state_parse_next_status status; |
| 1034 | struct argpar_item_non_opt *item_non_opt; |
| 1035 | |
| 1036 | ARGPAR_ITEM_DESTROY_AND_RESET(item); |
| 1037 | status = argpar_state_parse_next(state, &item, &error); |
| 1038 | if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR) { |
| 1039 | fprintf(stderr, "Error: %s\n", error); |
| 1040 | goto error; |
| 1041 | } else if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR_UNKNOWN_OPT) { |
| 1042 | /* Just stop parsing here. */ |
| 1043 | break; |
| 1044 | } else if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_END) { |
| 1045 | break; |
| 1046 | } |
| 1047 | |
| 1048 | assert(status == ARGPAR_STATE_PARSE_NEXT_STATUS_OK); |
| 1049 | assert(item->type == ARGPAR_ITEM_TYPE_NON_OPT); |
| 1050 | |
| 1051 | item_non_opt = (struct argpar_item_non_opt *) item; |
| 1052 | |
| 1053 | switch (item_non_opt->non_opt_index) { |
| 1054 | case 0: |
| 1055 | session_name_arg = item_non_opt->arg; |
| 1056 | break; |
| 1057 | default: |
| 1058 | fprintf(stderr, "Unexpected argument `%s`.\n", |
| 1059 | item_non_opt->arg); |
| 1060 | goto error; |
| 1061 | } |
| 1062 | } |
| 1063 | |
| 1064 | *argc -= argpar_state_get_ingested_orig_args(state); |
| 1065 | *argv += argpar_state_get_ingested_orig_args(state); |
| 1066 | |
| 1067 | if (!session_name_arg) { |
| 1068 | fprintf(stderr, "Missing session name.\n"); |
| 1069 | goto error; |
| 1070 | } |
| 1071 | |
| 1072 | action = create_action_cb(); |
| 1073 | if (!action) { |
| 1074 | fprintf(stderr, |
| 1075 | "Failed to allocate %s session action.\n", action_name); |
| 1076 | goto error; |
| 1077 | } |
| 1078 | |
| 1079 | action_status = set_session_name_cb(action, session_name_arg); |
| 1080 | if (action_status != LTTNG_ACTION_STATUS_OK) { |
| 1081 | fprintf(stderr, |
| 1082 | "Failed to set action %s session's session name.\n", |
| 1083 | action_name); |
| 1084 | goto error; |
| 1085 | } |
| 1086 | |
| 1087 | goto end; |
| 1088 | |
| 1089 | error: |
| 1090 | lttng_action_destroy(action); |
| 1091 | action = NULL; |
| 1092 | |
| 1093 | end: |
| 1094 | return action; |
| 1095 | } |
| 1096 | |
| 1097 | static |
| 1098 | struct lttng_action *handle_action_start_session(int *argc, |
| 1099 | const char ***argv) |
| 1100 | { |
| 1101 | return handle_action_simple_session(argc, argv, |
| 1102 | lttng_action_start_session_create, |
| 1103 | lttng_action_start_session_set_session_name, |
| 1104 | "start"); |
| 1105 | } |
| 1106 | |
| 1107 | static |
| 1108 | struct lttng_action *handle_action_stop_session(int *argc, |
| 1109 | const char ***argv) |
| 1110 | { |
| 1111 | return handle_action_simple_session(argc, argv, |
| 1112 | lttng_action_stop_session_create, |
| 1113 | lttng_action_stop_session_set_session_name, |
| 1114 | "stop"); |
| 1115 | } |
| 1116 | |
| 1117 | static |
| 1118 | struct lttng_action *handle_action_rotate_session(int *argc, |
| 1119 | const char ***argv) |
| 1120 | { |
| 1121 | return handle_action_simple_session(argc, argv, |
| 1122 | lttng_action_rotate_session_create, |
| 1123 | lttng_action_rotate_session_set_session_name, |
| 1124 | "rotate"); |
| 1125 | } |
| 1126 | |
| 1127 | static const struct argpar_opt_descr snapshot_action_opt_descrs[] = { |
| 1128 | { OPT_NAME, 'n', "name", true }, |
| 1129 | { OPT_MAX_SIZE, 'm', "max-size", true }, |
| 1130 | { OPT_CTRL_URL, '\0', "ctrl-url", true }, |
| 1131 | { OPT_DATA_URL, '\0', "data-url", true }, |
| 1132 | ARGPAR_OPT_DESCR_SENTINEL |
| 1133 | }; |
| 1134 | |
| 1135 | static |
| 1136 | struct lttng_action *handle_action_snapshot_session(int *argc, |
| 1137 | const char ***argv) |
| 1138 | { |
| 1139 | struct lttng_action *action = NULL; |
| 1140 | struct argpar_state *state = NULL; |
| 1141 | struct argpar_item *item = NULL; |
| 1142 | const char *session_name_arg = NULL; |
| 1143 | char *snapshot_name_arg = NULL; |
| 1144 | char *ctrl_url_arg = NULL; |
| 1145 | char *data_url_arg = NULL; |
| 1146 | char *max_size_arg = NULL; |
| 1147 | const char *url_arg = NULL; |
| 1148 | char *error = NULL; |
| 1149 | enum lttng_action_status action_status; |
| 1150 | struct lttng_snapshot_output *snapshot_output = NULL; |
| 1151 | int ret; |
| 1152 | |
| 1153 | state = argpar_state_create(*argc, *argv, snapshot_action_opt_descrs); |
| 1154 | if (!state) { |
| 1155 | fprintf(stderr, "Failed to allocate an argpar state.\n"); |
| 1156 | goto error; |
| 1157 | } |
| 1158 | |
| 1159 | while (true) { |
| 1160 | enum argpar_state_parse_next_status status; |
| 1161 | |
| 1162 | ARGPAR_ITEM_DESTROY_AND_RESET(item); |
| 1163 | status = argpar_state_parse_next(state, &item, &error); |
| 1164 | if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR) { |
| 1165 | fprintf(stderr, "Error: %s\n", error); |
| 1166 | goto error; |
| 1167 | } else if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR_UNKNOWN_OPT) { |
| 1168 | /* Just stop parsing here. */ |
| 1169 | break; |
| 1170 | } else if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_END) { |
| 1171 | break; |
| 1172 | } |
| 1173 | |
| 1174 | assert(status == ARGPAR_STATE_PARSE_NEXT_STATUS_OK); |
| 1175 | |
| 1176 | if (item->type == ARGPAR_ITEM_TYPE_OPT) { |
| 1177 | struct argpar_item_opt *item_opt = |
| 1178 | (struct argpar_item_opt *) item; |
| 1179 | |
| 1180 | switch (item_opt->descr->id) { |
| 1181 | case OPT_NAME: |
| 1182 | if (!assign_string(&snapshot_name_arg, item_opt->arg, "--name/-n")) { |
| 1183 | goto error; |
| 1184 | } |
| 1185 | break; |
| 1186 | |
| 1187 | case OPT_MAX_SIZE: |
| 1188 | if (!assign_string(&max_size_arg, item_opt->arg, "--max-size/-m")) { |
| 1189 | goto error; |
| 1190 | } |
| 1191 | break; |
| 1192 | |
| 1193 | case OPT_CTRL_URL: |
| 1194 | if (!assign_string(&ctrl_url_arg, item_opt->arg, "--ctrl-url")) { |
| 1195 | goto error; |
| 1196 | } |
| 1197 | break; |
| 1198 | |
| 1199 | case OPT_DATA_URL: |
| 1200 | if (!assign_string(&data_url_arg, item_opt->arg, "--data-url")) { |
| 1201 | goto error; |
| 1202 | } |
| 1203 | break; |
| 1204 | |
| 1205 | default: |
| 1206 | abort(); |
| 1207 | } |
| 1208 | } else { |
| 1209 | struct argpar_item_non_opt *item_non_opt; |
| 1210 | |
| 1211 | assert(item->type == ARGPAR_ITEM_TYPE_NON_OPT); |
| 1212 | |
| 1213 | item_non_opt = (struct argpar_item_non_opt *) item; |
| 1214 | |
| 1215 | switch (item_non_opt->non_opt_index) { |
| 1216 | case 0: |
| 1217 | session_name_arg = item_non_opt->arg; |
| 1218 | break; |
| 1219 | |
| 1220 | // FIXME: the use of a non-option argument for this is to |
| 1221 | // follow the syntax of `lttng snapshot record`. But otherwise, |
| 1222 | // I think an option argument would be best. |
| 1223 | case 1: |
| 1224 | url_arg = item_non_opt->arg; |
| 1225 | break; |
| 1226 | |
| 1227 | default: |
| 1228 | fprintf(stderr, "Unexpected argument `%s`.\n", |
| 1229 | item_non_opt->arg); |
| 1230 | goto error; |
| 1231 | } |
| 1232 | } |
| 1233 | } |
| 1234 | |
| 1235 | *argc -= argpar_state_get_ingested_orig_args(state); |
| 1236 | *argv += argpar_state_get_ingested_orig_args(state); |
| 1237 | |
| 1238 | if (!session_name_arg) { |
| 1239 | fprintf(stderr, "Missing session name.\n"); |
| 1240 | goto error; |
| 1241 | } |
| 1242 | |
| 1243 | /* --ctrl-url and --data-url must come in pair. */ |
| 1244 | if (ctrl_url_arg && !data_url_arg) { |
| 1245 | fprintf(stderr, "--ctrl-url is specified, but --data-url is missing.\n"); |
| 1246 | goto error; |
| 1247 | } |
| 1248 | |
| 1249 | if (!ctrl_url_arg && data_url_arg) { |
| 1250 | fprintf(stderr, "--data-url is specified, but --ctrl-url is missing.\n"); |
| 1251 | goto error; |
| 1252 | } |
| 1253 | |
| 1254 | /* --ctrl-url/--data-url and the non-option URL are mutually exclusive. */ |
| 1255 | if (ctrl_url_arg && url_arg) { |
| 1256 | fprintf(stderr, "Both --ctrl-url/--data-url and the non-option URL argument " |
| 1257 | "can't be used together.\n"); |
| 1258 | goto error; |
| 1259 | } |
| 1260 | |
| 1261 | /* |
| 1262 | * Did the user specify an option that implies using a |
| 1263 | * custom/unregistered output? |
| 1264 | */ |
| 1265 | if (url_arg || ctrl_url_arg) { |
| 1266 | snapshot_output = lttng_snapshot_output_create(); |
| 1267 | if (!snapshot_output) { |
| 1268 | fprintf(stderr, "Failed to allocate a snapshot output.\n"); |
| 1269 | goto error; |
| 1270 | } |
| 1271 | } |
| 1272 | |
| 1273 | action = lttng_action_snapshot_session_create(); |
| 1274 | if (!action) { |
| 1275 | fprintf(stderr, |
| 1276 | "Failed to allocate snapshot session action.\n"); |
| 1277 | goto error; |
| 1278 | } |
| 1279 | |
| 1280 | action_status = lttng_action_snapshot_session_set_session_name( |
| 1281 | action, session_name_arg); |
| 1282 | if (action_status != LTTNG_ACTION_STATUS_OK) { |
| 1283 | fprintf(stderr, |
| 1284 | "Failed to set action snapshot session's session name.\n"); |
| 1285 | goto error; |
| 1286 | } |
| 1287 | |
| 1288 | if (snapshot_name_arg) { |
| 1289 | if (!snapshot_output) { |
| 1290 | fprintf(stderr, "Can't provide a snapshot output name without a snapshot output destination.\n"); |
| 1291 | goto error; |
| 1292 | } |
| 1293 | |
| 1294 | ret = lttng_snapshot_output_set_name(snapshot_name_arg, snapshot_output); |
| 1295 | if (ret != 0) { |
| 1296 | fprintf(stderr, "Failed to set name of snapshot output.\n"); |
| 1297 | goto error; |
| 1298 | } |
| 1299 | } |
| 1300 | |
| 1301 | if (max_size_arg) { |
| 1302 | uint64_t max_size; |
| 1303 | |
| 1304 | if (!snapshot_output) { |
| 1305 | fprintf(stderr, "Can't provide a snapshot output max size without a snapshot output destination.\n"); |
| 1306 | goto error; |
| 1307 | } |
| 1308 | |
| 1309 | ret = utils_parse_size_suffix(max_size_arg, &max_size); |
| 1310 | if (ret != 0) { |
| 1311 | fprintf(stderr, "Failed to parse `%s` as a size.\n", max_size_arg); |
| 1312 | goto error; |
| 1313 | } |
| 1314 | |
| 1315 | ret = lttng_snapshot_output_set_size(max_size, snapshot_output); |
| 1316 | if (ret != 0) { |
| 1317 | fprintf(stderr, "Failed to set snapshot output's max size.\n"); |
| 1318 | goto error; |
| 1319 | } |
| 1320 | } |
| 1321 | |
| 1322 | if (url_arg) { |
| 1323 | /* One argument form, either net:// / net6:// or a local file path. */ |
| 1324 | |
| 1325 | if (strncmp(url_arg, "net://", strlen("net://")) == 0 || |
| 1326 | strncmp(url_arg, "net6://", strlen("net6://")) == 0) { |
| 1327 | ret = lttng_snapshot_output_set_network_url( |
| 1328 | url_arg, snapshot_output); |
| 1329 | if (ret != 0) { |
| 1330 | fprintf(stderr, "Failed to parse %s as a network URL.\n", url_arg); |
| 1331 | goto error; |
| 1332 | } |
| 1333 | } else { |
| 1334 | ret = lttng_snapshot_output_set_local_path( |
| 1335 | url_arg, snapshot_output); |
| 1336 | if (ret != 0) { |
| 1337 | fprintf(stderr, "Failed to parse %s as a local path.\n", url_arg); |
| 1338 | goto error; |
| 1339 | } |
| 1340 | } |
| 1341 | } |
| 1342 | |
| 1343 | if (ctrl_url_arg) { |
| 1344 | /* |
| 1345 | * Two argument form, network output with separate control and |
| 1346 | * data URLs. |
| 1347 | */ |
| 1348 | ret = lttng_snapshot_output_set_network_urls( |
| 1349 | ctrl_url_arg, data_url_arg, snapshot_output); |
| 1350 | if (ret != 0) { |
| 1351 | fprintf(stderr, "Failed to parse `%s` and `%s` as control and data URLs.\n", |
| 1352 | ctrl_url_arg, data_url_arg); |
| 1353 | goto error; |
| 1354 | } |
| 1355 | } |
| 1356 | |
| 1357 | if (snapshot_output) { |
| 1358 | action_status = lttng_action_snapshot_session_set_output( |
| 1359 | action, snapshot_output); |
| 1360 | if (action_status != LTTNG_ACTION_STATUS_OK) { |
| 1361 | fprintf(stderr, "Failed to set snapshot session action's output.\n"); |
| 1362 | goto error; |
| 1363 | } |
| 1364 | |
| 1365 | /* Ownership of `snapshot_output` has been transferred to the action. */ |
| 1366 | snapshot_output = NULL; |
| 1367 | } |
| 1368 | |
| 1369 | goto end; |
| 1370 | |
| 1371 | error: |
| 1372 | lttng_action_destroy(action); |
| 1373 | action = NULL; |
| 1374 | |
| 1375 | end: |
| 1376 | free(snapshot_name_arg); |
| 1377 | free(ctrl_url_arg); |
| 1378 | free(data_url_arg); |
| 1379 | free(snapshot_output); |
| 1380 | return action; |
| 1381 | } |
| 1382 | |
| 1383 | struct action_descr { |
| 1384 | const char *name; |
| 1385 | struct lttng_action *(*handler) (int *argc, const char ***argv); |
| 1386 | }; |
| 1387 | |
| 1388 | static const |
| 1389 | struct action_descr action_descrs[] = { |
| 1390 | { "notify", handle_action_notify }, |
| 1391 | { "start-session", handle_action_start_session }, |
| 1392 | { "stop-session", handle_action_stop_session }, |
| 1393 | { "rotate-session", handle_action_rotate_session }, |
| 1394 | { "snapshot-session", handle_action_snapshot_session }, |
| 1395 | }; |
| 1396 | |
| 1397 | static |
| 1398 | struct lttng_action *parse_action(int *argc, const char ***argv) |
| 1399 | { |
| 1400 | int i; |
| 1401 | struct lttng_action *action; |
| 1402 | const char *action_name; |
| 1403 | const struct action_descr *descr = NULL; |
| 1404 | |
| 1405 | if (*argc == 0) { |
| 1406 | fprintf(stderr, "Missing action name.\n"); |
| 1407 | goto error; |
| 1408 | } |
| 1409 | |
| 1410 | action_name = (*argv)[0]; |
| 1411 | |
| 1412 | (*argc)--; |
| 1413 | (*argv)++; |
| 1414 | |
| 1415 | for (i = 0; i < ARRAY_SIZE(action_descrs); i++) { |
| 1416 | if (strcmp(action_name, action_descrs[i].name) == 0) { |
| 1417 | descr = &action_descrs[i]; |
| 1418 | break; |
| 1419 | } |
| 1420 | } |
| 1421 | |
| 1422 | if (!descr) { |
| 1423 | fprintf(stderr, "Unknown action name: %s\n", action_name); |
| 1424 | goto error; |
| 1425 | } |
| 1426 | |
| 1427 | action = descr->handler(argc, argv); |
| 1428 | if (!action) { |
| 1429 | /* The handler has already printed an error message. */ |
| 1430 | goto error; |
| 1431 | } |
| 1432 | |
| 1433 | goto end; |
| 1434 | error: |
| 1435 | action = NULL; |
| 1436 | end: |
| 1437 | return action; |
| 1438 | } |
| 1439 | |
| 1440 | static const |
| 1441 | struct argpar_opt_descr add_trigger_options[] = { |
| 1442 | { OPT_HELP, 'h', "help", false }, |
| 1443 | { OPT_LIST_OPTIONS, '\0', "list-options", false }, |
| 1444 | { OPT_CONDITION, '\0', "condition", false }, |
| 1445 | { OPT_ACTION, '\0', "action", false }, |
| 1446 | { OPT_ID, '\0', "id", true }, |
| 1447 | { OPT_FIRE_ONCE_AFTER, '\0', "fire-once-after", true }, |
| 1448 | { OPT_FIRE_EVERY, '\0', "fire-every", true }, |
| 1449 | ARGPAR_OPT_DESCR_SENTINEL, |
| 1450 | }; |
| 1451 | |
| 1452 | static |
| 1453 | void lttng_actions_destructor(void *p) |
| 1454 | { |
| 1455 | struct lttng_action *action = p; |
| 1456 | |
| 1457 | lttng_action_destroy(action); |
| 1458 | } |
| 1459 | |
| 1460 | int cmd_add_trigger(int argc, const char **argv) |
| 1461 | { |
| 1462 | int ret; |
| 1463 | int my_argc = argc - 1; |
| 1464 | const char **my_argv = argv + 1; |
| 1465 | struct lttng_condition *condition = NULL; |
| 1466 | struct lttng_dynamic_pointer_array actions; |
| 1467 | struct argpar_state *argpar_state = NULL; |
| 1468 | struct argpar_item *argpar_item = NULL; |
| 1469 | struct lttng_action *action_group = NULL; |
| 1470 | struct lttng_action *action = NULL; |
| 1471 | struct lttng_trigger *trigger = NULL; |
| 1472 | char *error = NULL; |
| 1473 | char *id = NULL; |
| 1474 | int i; |
| 1475 | char *fire_once_after_str = NULL; |
| 1476 | char *fire_every_str = NULL; |
| 1477 | |
| 1478 | lttng_dynamic_pointer_array_init(&actions, lttng_actions_destructor); |
| 1479 | |
| 1480 | while (true) { |
| 1481 | enum argpar_state_parse_next_status status; |
| 1482 | struct argpar_item_opt *item_opt; |
| 1483 | int ingested_args; |
| 1484 | |
| 1485 | argpar_state_destroy(argpar_state); |
| 1486 | argpar_state = argpar_state_create(my_argc, my_argv, |
| 1487 | add_trigger_options); |
| 1488 | if (!argpar_state) { |
| 1489 | fprintf(stderr, "Failed to create argpar state.\n"); |
| 1490 | goto error; |
| 1491 | } |
| 1492 | |
| 1493 | status = argpar_state_parse_next(argpar_state, &argpar_item, &error); |
| 1494 | |
| 1495 | if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR) { |
| 1496 | fprintf(stderr, "Error: %s\n", error); |
| 1497 | goto error; |
| 1498 | } else if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR_UNKNOWN_OPT) { |
| 1499 | fprintf(stderr, "%s\n", error); |
| 1500 | goto error; |
| 1501 | } else if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_END) { |
| 1502 | break; |
| 1503 | } |
| 1504 | |
| 1505 | assert(status == ARGPAR_STATE_PARSE_NEXT_STATUS_OK); |
| 1506 | |
| 1507 | if (argpar_item->type == ARGPAR_ITEM_TYPE_NON_OPT) { |
| 1508 | struct argpar_item_non_opt *item_non_opt = |
| 1509 | (struct argpar_item_non_opt *) argpar_item; |
| 1510 | |
| 1511 | fprintf(stderr, "Unexpected argument `%s`.\n", |
| 1512 | item_non_opt->arg); |
| 1513 | goto error; |
| 1514 | } |
| 1515 | |
| 1516 | item_opt = (struct argpar_item_opt *) argpar_item; |
| 1517 | |
| 1518 | ingested_args = argpar_state_get_ingested_orig_args( |
| 1519 | argpar_state); |
| 1520 | |
| 1521 | my_argc -= ingested_args; |
| 1522 | my_argv += ingested_args; |
| 1523 | |
| 1524 | switch (item_opt->descr->id) { |
| 1525 | case OPT_HELP: |
| 1526 | SHOW_HELP(); |
| 1527 | ret = 0; |
| 1528 | goto end; |
| 1529 | |
| 1530 | case OPT_LIST_OPTIONS: |
| 1531 | list_cmd_options_argpar(stdout, add_trigger_options); |
| 1532 | ret = 0; |
| 1533 | goto end; |
| 1534 | |
| 1535 | case OPT_CONDITION: |
| 1536 | { |
| 1537 | if (condition) { |
| 1538 | fprintf(stderr, "A --condition was already given.\n"); |
| 1539 | goto error; |
| 1540 | } |
| 1541 | |
| 1542 | condition = parse_condition(&my_argc, &my_argv); |
| 1543 | if (!condition) { |
| 1544 | /* |
| 1545 | * An error message was already printed by |
| 1546 | * parse_condition. |
| 1547 | */ |
| 1548 | goto error; |
| 1549 | } |
| 1550 | |
| 1551 | break; |
| 1552 | } |
| 1553 | |
| 1554 | case OPT_ACTION: |
| 1555 | { |
| 1556 | action = parse_action(&my_argc, &my_argv); |
| 1557 | if (!action) { |
| 1558 | /* |
| 1559 | * An error message was already printed by |
| 1560 | * parse_condition. |
| 1561 | */ |
| 1562 | goto error; |
| 1563 | } |
| 1564 | |
| 1565 | ret = lttng_dynamic_pointer_array_add_pointer( |
| 1566 | &actions, action); |
| 1567 | if (ret) { |
| 1568 | fprintf(stderr, "Failed to add pointer to pointer array.\n"); |
| 1569 | goto error; |
| 1570 | } |
| 1571 | |
| 1572 | /* Ownership of the action was transferred to the group. */ |
| 1573 | action = NULL; |
| 1574 | |
| 1575 | break; |
| 1576 | } |
| 1577 | |
| 1578 | case OPT_ID: |
| 1579 | { |
| 1580 | if (!assign_string(&id, item_opt->arg, "--id")) { |
| 1581 | goto error; |
| 1582 | } |
| 1583 | |
| 1584 | break; |
| 1585 | } |
| 1586 | |
| 1587 | case OPT_FIRE_ONCE_AFTER: |
| 1588 | { |
| 1589 | if (!assign_string(&fire_once_after_str, item_opt->arg, |
| 1590 | "--fire-once-after")) { |
| 1591 | goto error; |
| 1592 | } |
| 1593 | break; |
| 1594 | } |
| 1595 | |
| 1596 | case OPT_FIRE_EVERY: |
| 1597 | { |
| 1598 | if (!assign_string(&fire_every_str, item_opt->arg, |
| 1599 | "--fire-every")) { |
| 1600 | goto error; |
| 1601 | } |
| 1602 | break; |
| 1603 | } |
| 1604 | |
| 1605 | default: |
| 1606 | abort(); |
| 1607 | } |
| 1608 | } |
| 1609 | |
| 1610 | if (!condition) { |
| 1611 | fprintf(stderr, "Missing --condition.\n"); |
| 1612 | goto error; |
| 1613 | } |
| 1614 | |
| 1615 | if (lttng_dynamic_pointer_array_get_count(&actions) == 0) { |
| 1616 | fprintf(stderr, "Need at least one --action.\n"); |
| 1617 | goto error; |
| 1618 | } |
| 1619 | |
| 1620 | if (fire_every_str && fire_once_after_str) { |
| 1621 | fprintf(stderr, "Can't specify both --fire-once-after and --fire-every.\n"); |
| 1622 | goto error; |
| 1623 | } |
| 1624 | |
| 1625 | action_group = lttng_action_group_create(); |
| 1626 | if (!action_group) { |
| 1627 | goto error; |
| 1628 | } |
| 1629 | |
| 1630 | for (i = 0; i < lttng_dynamic_pointer_array_get_count(&actions); i++) { |
| 1631 | enum lttng_action_status status; |
| 1632 | |
| 1633 | action = lttng_dynamic_pointer_array_steal_pointer(&actions, i); |
| 1634 | |
| 1635 | status = lttng_action_group_add_action( |
| 1636 | action_group, action); |
| 1637 | if (status != LTTNG_ACTION_STATUS_OK) { |
| 1638 | goto error; |
| 1639 | } |
| 1640 | |
| 1641 | /* Ownership of the action was transferred to the group. */ |
| 1642 | action = NULL; |
| 1643 | } |
| 1644 | |
| 1645 | |
| 1646 | trigger = lttng_trigger_create(condition, action_group); |
| 1647 | if (!trigger) { |
| 1648 | goto error; |
| 1649 | } |
| 1650 | |
| 1651 | /* |
| 1652 | * Ownership of the condition and action group was transferred to the |
| 1653 | * trigger. |
| 1654 | */ |
| 1655 | condition = NULL; |
| 1656 | action_group = NULL; |
| 1657 | |
| 1658 | if (id) { |
| 1659 | enum lttng_trigger_status trigger_status = |
| 1660 | lttng_trigger_set_name(trigger, id); |
| 1661 | if (trigger_status != LTTNG_TRIGGER_STATUS_OK) { |
| 1662 | fprintf(stderr, "Failed to set trigger id.\n"); |
| 1663 | goto error; |
| 1664 | } |
| 1665 | } |
| 1666 | |
| 1667 | if (fire_once_after_str) { |
| 1668 | unsigned long long threshold; |
| 1669 | enum lttng_trigger_status trigger_status; |
| 1670 | |
| 1671 | if (utils_parse_unsigned_long_long(fire_once_after_str, &threshold) != 0) { |
| 1672 | fprintf(stderr, "Failed to parse `%s` as an integer.\n", fire_once_after_str); |
| 1673 | goto error; |
| 1674 | } |
| 1675 | |
| 1676 | trigger_status = lttng_trigger_set_firing_policy(trigger, |
| 1677 | LTTNG_TRIGGER_FIRE_ONCE_AFTER_N, threshold); |
| 1678 | if (trigger_status != LTTNG_TRIGGER_STATUS_OK) { |
| 1679 | fprintf(stderr, "Failed to set trigger's firing policy.\n"); |
| 1680 | goto error; |
| 1681 | } |
| 1682 | } |
| 1683 | |
| 1684 | if (fire_every_str) { |
| 1685 | unsigned long long threshold; |
| 1686 | enum lttng_trigger_status trigger_status; |
| 1687 | |
| 1688 | if (utils_parse_unsigned_long_long(fire_every_str, &threshold) != 0) { |
| 1689 | fprintf(stderr, "Failed to parse `%s` as an integer.\n", fire_every_str); |
| 1690 | goto error; |
| 1691 | } |
| 1692 | |
| 1693 | trigger_status = lttng_trigger_set_firing_policy(trigger, |
| 1694 | LTTNG_TRIGGER_FIRE_EVERY_N, threshold); |
| 1695 | if (trigger_status != LTTNG_TRIGGER_STATUS_OK) { |
| 1696 | fprintf(stderr, "Failed to set trigger's firing policy.\n"); |
| 1697 | goto error; |
| 1698 | } |
| 1699 | } |
| 1700 | |
| 1701 | ret = lttng_register_trigger(trigger); |
| 1702 | if (ret) { |
| 1703 | fprintf(stderr, "Failed to register trigger: %s.\n", |
| 1704 | lttng_strerror(ret)); |
| 1705 | goto error; |
| 1706 | } |
| 1707 | |
| 1708 | printf("Trigger registered successfully.\n"); |
| 1709 | |
| 1710 | goto end; |
| 1711 | |
| 1712 | error: |
| 1713 | ret = 1; |
| 1714 | |
| 1715 | end: |
| 1716 | argpar_state_destroy(argpar_state); |
| 1717 | lttng_dynamic_pointer_array_reset(&actions); |
| 1718 | lttng_condition_destroy(condition); |
| 1719 | lttng_action_destroy(action_group); |
| 1720 | lttng_trigger_destroy(trigger); |
| 1721 | free(id); |
| 1722 | free(fire_once_after_str); |
| 1723 | free(fire_every_str); |
| 1724 | // TODO: check what else to free |
| 1725 | |
| 1726 | return ret; |
| 1727 | } |