| 1 | /* |
| 2 | * Copyright (C) 2021 Simon Marchi <simon.marchi@efficios.com> |
| 3 | * |
| 4 | * SPDX-License-Identifier: GPL-2.0-only |
| 5 | * |
| 6 | */ |
| 7 | |
| 8 | #include <ctype.h> |
| 9 | #include <stdio.h> |
| 10 | |
| 11 | #include "../command.h" |
| 12 | #include "../loglevel.h" |
| 13 | #include "../uprobe.h" |
| 14 | |
| 15 | #include "common/argpar/argpar.h" |
| 16 | #include "common/dynamic-array.h" |
| 17 | #include "common/string-utils/string-utils.h" |
| 18 | #include "common/utils.h" |
| 19 | /* For lttng_event_rule_type_str(). */ |
| 20 | #include <lttng/event-rule/event-rule-internal.h> |
| 21 | #include <lttng/lttng.h> |
| 22 | #include "common/filter/filter-ast.h" |
| 23 | #include "common/filter/filter-ir.h" |
| 24 | #include "common/dynamic-array.h" |
| 25 | |
| 26 | #if (LTTNG_SYMBOL_NAME_LEN == 256) |
| 27 | #define LTTNG_SYMBOL_NAME_LEN_SCANF_IS_A_BROKEN_API "255" |
| 28 | #endif |
| 29 | |
| 30 | #ifdef LTTNG_EMBED_HELP |
| 31 | static const char help_msg[] = |
| 32 | #include <lttng-add-trigger.1.h> |
| 33 | ; |
| 34 | #endif |
| 35 | |
| 36 | enum { |
| 37 | OPT_HELP, |
| 38 | OPT_LIST_OPTIONS, |
| 39 | |
| 40 | OPT_CONDITION, |
| 41 | OPT_ACTION, |
| 42 | OPT_ID, |
| 43 | OPT_FIRE_ONCE_AFTER, |
| 44 | OPT_FIRE_EVERY, |
| 45 | OPT_USER_ID, |
| 46 | |
| 47 | OPT_ALL, |
| 48 | OPT_FILTER, |
| 49 | OPT_EXCLUDE, |
| 50 | OPT_LOGLEVEL, |
| 51 | OPT_LOGLEVEL_ONLY, |
| 52 | |
| 53 | OPT_USERSPACE, |
| 54 | OPT_KERNEL, |
| 55 | OPT_LOG4J, |
| 56 | OPT_JUL, |
| 57 | OPT_PYTHON, |
| 58 | |
| 59 | OPT_FUNCTION, |
| 60 | OPT_PROBE, |
| 61 | OPT_USERSPACE_PROBE, |
| 62 | OPT_SYSCALL, |
| 63 | OPT_TRACEPOINT, |
| 64 | |
| 65 | OPT_NAME, |
| 66 | OPT_MAX_SIZE, |
| 67 | OPT_DATA_URL, |
| 68 | OPT_CTRL_URL, |
| 69 | OPT_URL, |
| 70 | OPT_PATH, |
| 71 | |
| 72 | OPT_CAPTURE, |
| 73 | }; |
| 74 | |
| 75 | static const struct argpar_opt_descr event_rule_opt_descrs[] = { |
| 76 | { OPT_ALL, 'a', "all", false }, |
| 77 | { OPT_FILTER, 'f', "filter", true }, |
| 78 | { OPT_EXCLUDE, 'x', "exclude", true }, |
| 79 | { OPT_LOGLEVEL, '\0', "loglevel", true }, |
| 80 | { OPT_LOGLEVEL_ONLY, '\0', "loglevel-only", true }, |
| 81 | |
| 82 | /* Domains */ |
| 83 | { OPT_USERSPACE, 'u', "userspace", false }, |
| 84 | { OPT_KERNEL, 'k', "kernel", false }, |
| 85 | { OPT_LOG4J, 'l', "log4j", false }, |
| 86 | { OPT_JUL, 'j', "jul", false }, |
| 87 | { OPT_PYTHON, 'p', "python", false }, |
| 88 | |
| 89 | /* Event rule types */ |
| 90 | { OPT_FUNCTION, '\0', "function", true }, |
| 91 | { OPT_PROBE, '\0', "probe", true }, |
| 92 | { OPT_USERSPACE_PROBE, '\0', "userspace-probe", true }, |
| 93 | { OPT_SYSCALL, '\0', "syscall" }, |
| 94 | { OPT_TRACEPOINT, '\0', "tracepoint" }, |
| 95 | |
| 96 | /* Capture descriptor */ |
| 97 | { OPT_CAPTURE, '\0', "capture", true }, |
| 98 | |
| 99 | ARGPAR_OPT_DESCR_SENTINEL |
| 100 | }; |
| 101 | |
| 102 | static |
| 103 | bool assign_domain_type(enum lttng_domain_type *dest, |
| 104 | enum lttng_domain_type src) |
| 105 | { |
| 106 | bool ret; |
| 107 | |
| 108 | if (*dest == LTTNG_DOMAIN_NONE || *dest == src) { |
| 109 | *dest = src; |
| 110 | ret = true; |
| 111 | } else { |
| 112 | ERR("Multiple domains specified."); |
| 113 | ret = false; |
| 114 | } |
| 115 | |
| 116 | return ret; |
| 117 | } |
| 118 | |
| 119 | static |
| 120 | bool assign_event_rule_type(enum lttng_event_rule_type *dest, |
| 121 | enum lttng_event_rule_type src) |
| 122 | { |
| 123 | bool ret; |
| 124 | |
| 125 | if (*dest == LTTNG_EVENT_RULE_TYPE_UNKNOWN || *dest == src) { |
| 126 | *dest = src; |
| 127 | ret = true; |
| 128 | } else { |
| 129 | ERR("Multiple event types specified."); |
| 130 | ret = false; |
| 131 | } |
| 132 | |
| 133 | return ret; |
| 134 | } |
| 135 | |
| 136 | static |
| 137 | bool assign_string(char **dest, const char *src, const char *opt_name) |
| 138 | { |
| 139 | bool ret; |
| 140 | |
| 141 | if (*dest) { |
| 142 | ERR("Duplicate '%s' given.", opt_name); |
| 143 | goto error; |
| 144 | } |
| 145 | |
| 146 | *dest = strdup(src); |
| 147 | if (!*dest) { |
| 148 | PERROR("Failed to allocate string '%s'.", opt_name); |
| 149 | goto error; |
| 150 | } |
| 151 | |
| 152 | ret = true; |
| 153 | goto end; |
| 154 | |
| 155 | error: |
| 156 | ret = false; |
| 157 | |
| 158 | end: |
| 159 | return ret; |
| 160 | } |
| 161 | |
| 162 | /* This is defined in enable_events.c. */ |
| 163 | LTTNG_HIDDEN |
| 164 | int create_exclusion_list_and_validate(const char *event_name, |
| 165 | const char *exclusions_arg, |
| 166 | char ***exclusion_list); |
| 167 | |
| 168 | /* |
| 169 | * Parse `str` as a log level in domain `domain_type`. Return -1 if the string |
| 170 | * is not recognized as a valid log level. |
| 171 | */ |
| 172 | static |
| 173 | int parse_loglevel_string(const char *str, enum lttng_domain_type domain_type) |
| 174 | { |
| 175 | switch (domain_type) { |
| 176 | case LTTNG_DOMAIN_UST: |
| 177 | { |
| 178 | enum lttng_loglevel loglevel; |
| 179 | const int ret = loglevel_name_to_value(str, &loglevel); |
| 180 | |
| 181 | return ret == -1 ? ret : (int) loglevel; |
| 182 | } |
| 183 | case LTTNG_DOMAIN_LOG4J: |
| 184 | { |
| 185 | enum lttng_loglevel_log4j loglevel; |
| 186 | const int ret = loglevel_log4j_name_to_value(str, &loglevel); |
| 187 | |
| 188 | return ret == -1 ? ret : (int) loglevel; |
| 189 | } |
| 190 | case LTTNG_DOMAIN_JUL: |
| 191 | { |
| 192 | enum lttng_loglevel_jul loglevel; |
| 193 | const int ret = loglevel_jul_name_to_value(str, &loglevel); |
| 194 | |
| 195 | return ret == -1 ? ret : (int) loglevel; |
| 196 | } |
| 197 | case LTTNG_DOMAIN_PYTHON: |
| 198 | { |
| 199 | enum lttng_loglevel_python loglevel; |
| 200 | const int ret = loglevel_python_name_to_value(str, &loglevel); |
| 201 | |
| 202 | return ret == -1 ? ret : (int) loglevel; |
| 203 | } |
| 204 | default: |
| 205 | /* Invalid domain type. */ |
| 206 | abort(); |
| 207 | } |
| 208 | } |
| 209 | |
| 210 | static int parse_kernel_probe_opts(const char *source, |
| 211 | struct lttng_kernel_probe_location **location) |
| 212 | { |
| 213 | int ret = 0; |
| 214 | int match; |
| 215 | char s_hex[19]; |
| 216 | char name[LTTNG_SYMBOL_NAME_LEN]; |
| 217 | char *symbol_name = NULL; |
| 218 | uint64_t offset; |
| 219 | |
| 220 | /* Check for symbol+offset. */ |
| 221 | match = sscanf(source, |
| 222 | "%" LTTNG_SYMBOL_NAME_LEN_SCANF_IS_A_BROKEN_API |
| 223 | "[^'+']+%18s", |
| 224 | name, s_hex); |
| 225 | if (match == 2) { |
| 226 | if (*s_hex == '\0') { |
| 227 | ERR("Kernel probe symbol offset is missing."); |
| 228 | goto error; |
| 229 | } |
| 230 | |
| 231 | symbol_name = strndup(name, LTTNG_SYMBOL_NAME_LEN); |
| 232 | if (!symbol_name) { |
| 233 | PERROR("Failed to copy kernel probe location symbol name."); |
| 234 | goto error; |
| 235 | } |
| 236 | offset = strtoul(s_hex, NULL, 0); |
| 237 | |
| 238 | *location = lttng_kernel_probe_location_symbol_create( |
| 239 | symbol_name, offset); |
| 240 | if (!*location) { |
| 241 | ERR("Failed to create symbol kernel probe location."); |
| 242 | goto error; |
| 243 | } |
| 244 | |
| 245 | goto end; |
| 246 | } |
| 247 | |
| 248 | /* Check for symbol. */ |
| 249 | if (isalpha(name[0]) || name[0] == '_') { |
| 250 | match = sscanf(source, |
| 251 | "%" LTTNG_SYMBOL_NAME_LEN_SCANF_IS_A_BROKEN_API |
| 252 | "s", |
| 253 | name); |
| 254 | if (match == 1) { |
| 255 | symbol_name = strndup(name, LTTNG_SYMBOL_NAME_LEN); |
| 256 | if (!symbol_name) { |
| 257 | ERR("Failed to copy kernel probe location symbol name."); |
| 258 | goto error; |
| 259 | } |
| 260 | |
| 261 | *location = lttng_kernel_probe_location_symbol_create( |
| 262 | symbol_name, 0); |
| 263 | if (!*location) { |
| 264 | ERR("Failed to create symbol kernel probe location."); |
| 265 | goto error; |
| 266 | } |
| 267 | |
| 268 | goto end; |
| 269 | } |
| 270 | } |
| 271 | |
| 272 | /* Check for address. */ |
| 273 | match = sscanf(source, "%18s", s_hex); |
| 274 | if (match > 0) { |
| 275 | uint64_t address; |
| 276 | |
| 277 | if (*s_hex == '\0') { |
| 278 | ERR("Invalid kernel probe location address."); |
| 279 | goto error; |
| 280 | } |
| 281 | |
| 282 | address = strtoul(s_hex, NULL, 0); |
| 283 | *location = lttng_kernel_probe_location_address_create(address); |
| 284 | if (!*location) { |
| 285 | ERR("Failed to create symbol kernel probe location."); |
| 286 | goto error; |
| 287 | } |
| 288 | |
| 289 | goto end; |
| 290 | } |
| 291 | |
| 292 | error: |
| 293 | /* No match */ |
| 294 | ret = -1; |
| 295 | *location = NULL; |
| 296 | |
| 297 | end: |
| 298 | free(symbol_name); |
| 299 | return ret; |
| 300 | } |
| 301 | |
| 302 | static |
| 303 | struct lttng_event_expr *ir_op_load_expr_to_event_expr( |
| 304 | const struct ir_load_expression *load_expr, |
| 305 | const char *capture_str) |
| 306 | { |
| 307 | char *provider_name = NULL; |
| 308 | struct lttng_event_expr *event_expr = NULL; |
| 309 | const struct ir_load_expression_op *load_expr_op = load_expr->child; |
| 310 | const enum ir_load_expression_type load_expr_child_type = |
| 311 | load_expr_op->type; |
| 312 | |
| 313 | switch (load_expr_child_type) { |
| 314 | case IR_LOAD_EXPRESSION_GET_PAYLOAD_ROOT: |
| 315 | case IR_LOAD_EXPRESSION_GET_CONTEXT_ROOT: |
| 316 | { |
| 317 | const char *field_name; |
| 318 | |
| 319 | load_expr_op = load_expr_op->next; |
| 320 | assert(load_expr_op); |
| 321 | assert(load_expr_op->type == IR_LOAD_EXPRESSION_GET_SYMBOL); |
| 322 | field_name = load_expr_op->u.symbol; |
| 323 | assert(field_name); |
| 324 | |
| 325 | event_expr = load_expr_child_type == IR_LOAD_EXPRESSION_GET_PAYLOAD_ROOT ? |
| 326 | lttng_event_expr_event_payload_field_create(field_name) : |
| 327 | lttng_event_expr_channel_context_field_create(field_name); |
| 328 | if (!event_expr) { |
| 329 | ERR("Failed to create %s event expression: field name = `%s`.", |
| 330 | load_expr_child_type == IR_LOAD_EXPRESSION_GET_PAYLOAD_ROOT ? |
| 331 | "payload field" : "channel context", |
| 332 | field_name); |
| 333 | goto error; |
| 334 | } |
| 335 | |
| 336 | break; |
| 337 | } |
| 338 | case IR_LOAD_EXPRESSION_GET_APP_CONTEXT_ROOT: |
| 339 | { |
| 340 | const char *colon; |
| 341 | const char *type_name; |
| 342 | const char *field_name; |
| 343 | |
| 344 | load_expr_op = load_expr_op->next; |
| 345 | assert(load_expr_op); |
| 346 | assert(load_expr_op->type == IR_LOAD_EXPRESSION_GET_SYMBOL); |
| 347 | field_name = load_expr_op->u.symbol; |
| 348 | assert(field_name); |
| 349 | |
| 350 | /* |
| 351 | * The field name needs to be of the form PROVIDER:TYPE. We |
| 352 | * split it here. |
| 353 | */ |
| 354 | colon = strchr(field_name, ':'); |
| 355 | if (!colon) { |
| 356 | ERR("Invalid app-specific context field name: missing colon in `%s`.", |
| 357 | field_name); |
| 358 | goto error; |
| 359 | } |
| 360 | |
| 361 | type_name = colon + 1; |
| 362 | if (*type_name == '\0') { |
| 363 | ERR("Invalid app-specific context field name: missing type name after colon in `%s`.", |
| 364 | field_name); |
| 365 | goto error; |
| 366 | } |
| 367 | |
| 368 | provider_name = strndup(field_name, colon - field_name); |
| 369 | if (!provider_name) { |
| 370 | PERROR("Failed to allocate field name string"); |
| 371 | goto error; |
| 372 | } |
| 373 | |
| 374 | event_expr = lttng_event_expr_app_specific_context_field_create( |
| 375 | provider_name, type_name); |
| 376 | if (!event_expr) { |
| 377 | ERR("Failed to create app-specific context field event expression: provider name = `%s`, type name = `%s`", |
| 378 | provider_name, type_name); |
| 379 | goto error; |
| 380 | } |
| 381 | |
| 382 | break; |
| 383 | } |
| 384 | default: |
| 385 | ERR("%s: unexpected load expr type %d.", __func__, |
| 386 | load_expr_op->type); |
| 387 | abort(); |
| 388 | } |
| 389 | |
| 390 | load_expr_op = load_expr_op->next; |
| 391 | |
| 392 | /* There may be a single array index after that. */ |
| 393 | if (load_expr_op->type == IR_LOAD_EXPRESSION_GET_INDEX) { |
| 394 | struct lttng_event_expr *index_event_expr; |
| 395 | const uint64_t index = load_expr_op->u.index; |
| 396 | |
| 397 | index_event_expr = lttng_event_expr_array_field_element_create(event_expr, index); |
| 398 | if (!index_event_expr) { |
| 399 | ERR("Failed to create array field element event expression."); |
| 400 | goto error; |
| 401 | } |
| 402 | |
| 403 | event_expr = index_event_expr; |
| 404 | load_expr_op = load_expr_op->next; |
| 405 | } |
| 406 | |
| 407 | switch (load_expr_op->type) { |
| 408 | case IR_LOAD_EXPRESSION_LOAD_FIELD: |
| 409 | /* |
| 410 | * This is what we expect, IR_LOAD_EXPRESSION_LOAD_FIELD is |
| 411 | * always found at the end of the chain. |
| 412 | */ |
| 413 | break; |
| 414 | case IR_LOAD_EXPRESSION_GET_SYMBOL: |
| 415 | ERR("While parsing expression `%s`: Capturing subfields is not supported.", |
| 416 | capture_str); |
| 417 | goto error; |
| 418 | |
| 419 | default: |
| 420 | ERR("%s: unexpected load expression operator %s.", __func__, |
| 421 | ir_load_expression_type_str(load_expr_op->type)); |
| 422 | abort(); |
| 423 | } |
| 424 | |
| 425 | goto end; |
| 426 | |
| 427 | error: |
| 428 | lttng_event_expr_destroy(event_expr); |
| 429 | event_expr = NULL; |
| 430 | |
| 431 | end: |
| 432 | free(provider_name); |
| 433 | |
| 434 | return event_expr; |
| 435 | } |
| 436 | |
| 437 | static |
| 438 | struct lttng_event_expr *ir_op_load_to_event_expr( |
| 439 | const struct ir_op *ir, const char *capture_str) |
| 440 | { |
| 441 | struct lttng_event_expr *event_expr = NULL; |
| 442 | |
| 443 | assert(ir->op == IR_OP_LOAD); |
| 444 | |
| 445 | switch (ir->data_type) { |
| 446 | case IR_DATA_EXPRESSION: |
| 447 | { |
| 448 | const struct ir_load_expression *ir_load_expr = |
| 449 | ir->u.load.u.expression; |
| 450 | |
| 451 | event_expr = ir_op_load_expr_to_event_expr( |
| 452 | ir_load_expr, capture_str); |
| 453 | break; |
| 454 | } |
| 455 | default: |
| 456 | ERR("%s: unexpected data type: %s.", __func__, |
| 457 | ir_data_type_str(ir->data_type)); |
| 458 | abort(); |
| 459 | } |
| 460 | |
| 461 | return event_expr; |
| 462 | } |
| 463 | |
| 464 | static |
| 465 | const char *ir_operator_type_human_str(enum ir_op_type op) |
| 466 | { |
| 467 | const char *name; |
| 468 | |
| 469 | switch (op) { |
| 470 | case IR_OP_BINARY: |
| 471 | name = "Binary"; |
| 472 | break; |
| 473 | case IR_OP_UNARY: |
| 474 | name = "Unary"; |
| 475 | break; |
| 476 | case IR_OP_LOGICAL: |
| 477 | name = "Logical"; |
| 478 | break; |
| 479 | default: |
| 480 | abort(); |
| 481 | } |
| 482 | |
| 483 | return name; |
| 484 | } |
| 485 | |
| 486 | static |
| 487 | struct lttng_event_expr *ir_op_root_to_event_expr(const struct ir_op *ir, |
| 488 | const char *capture_str) |
| 489 | { |
| 490 | struct lttng_event_expr *event_expr = NULL; |
| 491 | |
| 492 | assert(ir->op == IR_OP_ROOT); |
| 493 | ir = ir->u.root.child; |
| 494 | |
| 495 | switch (ir->op) { |
| 496 | case IR_OP_LOAD: |
| 497 | event_expr = ir_op_load_to_event_expr(ir, capture_str); |
| 498 | break; |
| 499 | case IR_OP_BINARY: |
| 500 | case IR_OP_UNARY: |
| 501 | case IR_OP_LOGICAL: |
| 502 | ERR("While parsing expression `%s`: %s operators are not allowed in capture expressions.", |
| 503 | capture_str, |
| 504 | ir_operator_type_human_str(ir->op)); |
| 505 | break; |
| 506 | default: |
| 507 | ERR("%s: unexpected IR op type: %s.", __func__, |
| 508 | ir_op_type_str(ir->op)); |
| 509 | abort(); |
| 510 | } |
| 511 | |
| 512 | return event_expr; |
| 513 | } |
| 514 | |
| 515 | static |
| 516 | void destroy_event_expr(void *ptr) |
| 517 | { |
| 518 | lttng_event_expr_destroy(ptr); |
| 519 | } |
| 520 | |
| 521 | struct parse_event_rule_res { |
| 522 | /* Owned by this. */ |
| 523 | struct lttng_event_rule *er; |
| 524 | |
| 525 | /* Array of `struct lttng_event_expr *` */ |
| 526 | struct lttng_dynamic_pointer_array capture_descriptors; |
| 527 | }; |
| 528 | |
| 529 | static |
| 530 | struct parse_event_rule_res parse_event_rule(int *argc, const char ***argv) |
| 531 | { |
| 532 | enum lttng_domain_type domain_type = LTTNG_DOMAIN_NONE; |
| 533 | enum lttng_event_rule_type event_rule_type = |
| 534 | LTTNG_EVENT_RULE_TYPE_UNKNOWN; |
| 535 | struct argpar_state *state; |
| 536 | struct argpar_item *item = NULL; |
| 537 | char *error = NULL; |
| 538 | int consumed_args = -1; |
| 539 | struct lttng_kernel_probe_location *kernel_probe_location = NULL; |
| 540 | struct lttng_userspace_probe_location *userspace_probe_location = NULL; |
| 541 | struct parse_event_rule_res res = { 0 }; |
| 542 | struct lttng_event_expr *event_expr = NULL; |
| 543 | struct filter_parser_ctx *parser_ctx = NULL; |
| 544 | |
| 545 | /* Was the -a/--all flag provided? */ |
| 546 | bool all_events = false; |
| 547 | |
| 548 | /* Tracepoint name (non-option argument). */ |
| 549 | const char *tracepoint_name = NULL; |
| 550 | |
| 551 | /* Holds the argument of --probe / --userspace-probe. */ |
| 552 | char *source = NULL; |
| 553 | |
| 554 | /* Filter. */ |
| 555 | char *filter = NULL; |
| 556 | |
| 557 | /* Exclude. */ |
| 558 | char *exclude = NULL; |
| 559 | char **exclusion_list = NULL; |
| 560 | |
| 561 | /* Log level. */ |
| 562 | char *loglevel_str = NULL; |
| 563 | bool loglevel_only = false; |
| 564 | |
| 565 | lttng_dynamic_pointer_array_init(&res.capture_descriptors, |
| 566 | destroy_event_expr); |
| 567 | state = argpar_state_create(*argc, *argv, event_rule_opt_descrs); |
| 568 | if (!state) { |
| 569 | ERR("Failed to allocate an argpar state."); |
| 570 | goto error; |
| 571 | } |
| 572 | |
| 573 | while (true) { |
| 574 | enum argpar_state_parse_next_status status; |
| 575 | |
| 576 | ARGPAR_ITEM_DESTROY_AND_RESET(item); |
| 577 | status = argpar_state_parse_next(state, &item, &error); |
| 578 | if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR) { |
| 579 | ERR("%s", error); |
| 580 | goto error; |
| 581 | } else if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR_UNKNOWN_OPT) { |
| 582 | /* Just stop parsing here. */ |
| 583 | break; |
| 584 | } else if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_END) { |
| 585 | break; |
| 586 | } |
| 587 | |
| 588 | assert(status == ARGPAR_STATE_PARSE_NEXT_STATUS_OK); |
| 589 | |
| 590 | if (item->type == ARGPAR_ITEM_TYPE_OPT) { |
| 591 | const struct argpar_item_opt *item_opt = |
| 592 | (const struct argpar_item_opt *) item; |
| 593 | |
| 594 | switch (item_opt->descr->id) { |
| 595 | /* Domains. */ |
| 596 | case OPT_USERSPACE: |
| 597 | if (!assign_domain_type(&domain_type, LTTNG_DOMAIN_UST)) { |
| 598 | goto error; |
| 599 | } |
| 600 | |
| 601 | break; |
| 602 | case OPT_KERNEL: |
| 603 | if (!assign_domain_type(&domain_type, LTTNG_DOMAIN_KERNEL)) { |
| 604 | goto error; |
| 605 | } |
| 606 | |
| 607 | break; |
| 608 | case OPT_LOG4J: |
| 609 | if (!assign_domain_type(&domain_type, LTTNG_DOMAIN_LOG4J)) { |
| 610 | goto error; |
| 611 | } |
| 612 | |
| 613 | break; |
| 614 | case OPT_JUL: |
| 615 | if (!assign_domain_type(&domain_type, LTTNG_DOMAIN_JUL)) { |
| 616 | goto error; |
| 617 | } |
| 618 | |
| 619 | break; |
| 620 | case OPT_PYTHON: |
| 621 | if (!assign_domain_type(&domain_type, LTTNG_DOMAIN_PYTHON)) { |
| 622 | goto error; |
| 623 | } |
| 624 | |
| 625 | break; |
| 626 | |
| 627 | /* Event rule types */ |
| 628 | case OPT_FUNCTION: |
| 629 | if (!assign_event_rule_type(&event_rule_type, |
| 630 | LTTNG_EVENT_RULE_TYPE_KRETPROBE)) { |
| 631 | goto error; |
| 632 | } |
| 633 | |
| 634 | break; |
| 635 | case OPT_PROBE: |
| 636 | if (!assign_event_rule_type(&event_rule_type, |
| 637 | LTTNG_EVENT_RULE_TYPE_KPROBE)) { |
| 638 | goto error; |
| 639 | } |
| 640 | |
| 641 | if (!assign_string(&source, item_opt->arg, "source")) { |
| 642 | goto error; |
| 643 | } |
| 644 | |
| 645 | break; |
| 646 | case OPT_USERSPACE_PROBE: |
| 647 | if (!assign_event_rule_type(&event_rule_type, |
| 648 | LTTNG_EVENT_RULE_TYPE_UPROBE)) { |
| 649 | goto error; |
| 650 | } |
| 651 | |
| 652 | if (!assign_string(&source, item_opt->arg, "source")) { |
| 653 | goto error; |
| 654 | } |
| 655 | |
| 656 | break; |
| 657 | case OPT_SYSCALL: |
| 658 | if (!assign_event_rule_type(&event_rule_type, |
| 659 | LTTNG_EVENT_RULE_TYPE_SYSCALL)) { |
| 660 | goto error; |
| 661 | } |
| 662 | |
| 663 | break; |
| 664 | case OPT_TRACEPOINT: |
| 665 | if (!assign_event_rule_type(&event_rule_type, |
| 666 | LTTNG_EVENT_RULE_TYPE_TRACEPOINT)) { |
| 667 | goto error; |
| 668 | } |
| 669 | |
| 670 | break; |
| 671 | case OPT_ALL: |
| 672 | all_events = true; |
| 673 | break; |
| 674 | case OPT_FILTER: |
| 675 | if (!assign_string(&filter, item_opt->arg, |
| 676 | "--filter/-f")) { |
| 677 | goto error; |
| 678 | } |
| 679 | |
| 680 | break; |
| 681 | case OPT_EXCLUDE: |
| 682 | if (!assign_string(&exclude, item_opt->arg, |
| 683 | "--exclude/-x")) { |
| 684 | goto error; |
| 685 | } |
| 686 | |
| 687 | break; |
| 688 | case OPT_LOGLEVEL: |
| 689 | case OPT_LOGLEVEL_ONLY: |
| 690 | if (!assign_string(&loglevel_str, item_opt->arg, |
| 691 | "--loglevel/--loglevel-only")) { |
| 692 | goto error; |
| 693 | } |
| 694 | |
| 695 | loglevel_only = item_opt->descr->id == |
| 696 | OPT_LOGLEVEL_ONLY; |
| 697 | break; |
| 698 | case OPT_CAPTURE: |
| 699 | { |
| 700 | int ret; |
| 701 | const char *capture_str = item_opt->arg; |
| 702 | |
| 703 | ret = filter_parser_ctx_create_from_filter_expression( |
| 704 | capture_str, &parser_ctx); |
| 705 | if (ret) { |
| 706 | ERR("Failed to parse capture expression `%s`.", |
| 707 | capture_str); |
| 708 | goto error; |
| 709 | } |
| 710 | |
| 711 | event_expr = ir_op_root_to_event_expr( |
| 712 | parser_ctx->ir_root, |
| 713 | capture_str); |
| 714 | if (!event_expr) { |
| 715 | /* |
| 716 | * ir_op_root_to_event_expr has printed |
| 717 | * an error message. |
| 718 | */ |
| 719 | goto error; |
| 720 | } |
| 721 | |
| 722 | ret = lttng_dynamic_pointer_array_add_pointer( |
| 723 | &res.capture_descriptors, |
| 724 | event_expr); |
| 725 | if (ret) { |
| 726 | goto error; |
| 727 | } |
| 728 | |
| 729 | /* |
| 730 | * The ownership of event expression was |
| 731 | * transferred to the dynamic array. |
| 732 | */ |
| 733 | event_expr = NULL; |
| 734 | |
| 735 | break; |
| 736 | } |
| 737 | default: |
| 738 | abort(); |
| 739 | } |
| 740 | } else { |
| 741 | const struct argpar_item_non_opt *item_non_opt = |
| 742 | (const struct argpar_item_non_opt *) |
| 743 | item; |
| 744 | |
| 745 | /* |
| 746 | * Don't accept two non-option arguments/tracepoint |
| 747 | * names. |
| 748 | */ |
| 749 | if (tracepoint_name) { |
| 750 | ERR("Unexpected argument '%s'", |
| 751 | item_non_opt->arg); |
| 752 | goto error; |
| 753 | } |
| 754 | |
| 755 | tracepoint_name = item_non_opt->arg; |
| 756 | } |
| 757 | } |
| 758 | |
| 759 | if (event_rule_type == LTTNG_EVENT_RULE_TYPE_UNKNOWN) { |
| 760 | event_rule_type = LTTNG_EVENT_RULE_TYPE_TRACEPOINT; |
| 761 | } |
| 762 | |
| 763 | /* |
| 764 | * Option -a is applicable to event rules of type tracepoint and |
| 765 | * syscall, and it is equivalent to using "*" as the tracepoint name. |
| 766 | */ |
| 767 | if (all_events) { |
| 768 | switch (event_rule_type) { |
| 769 | case LTTNG_EVENT_RULE_TYPE_TRACEPOINT: |
| 770 | case LTTNG_EVENT_RULE_TYPE_SYSCALL: |
| 771 | break; |
| 772 | default: |
| 773 | ERR("Can't use -a/--all with %s event rules.", |
| 774 | lttng_event_rule_type_str(event_rule_type)); |
| 775 | goto error; |
| 776 | } |
| 777 | |
| 778 | if (tracepoint_name) { |
| 779 | ERR("Can't provide a tracepoint name with -a/--all."); |
| 780 | goto error; |
| 781 | } |
| 782 | |
| 783 | /* In which case, it's equivalent to tracepoint name "*". */ |
| 784 | tracepoint_name = "*"; |
| 785 | } |
| 786 | |
| 787 | /* |
| 788 | * A tracepoint name (or -a, for the event rule types that accept it) |
| 789 | * is required. |
| 790 | */ |
| 791 | if (!tracepoint_name) { |
| 792 | ERR("Need to provide either a tracepoint name or -a/--all."); |
| 793 | goto error; |
| 794 | } |
| 795 | |
| 796 | /* |
| 797 | * We don't support multiple tracepoint names for now. |
| 798 | */ |
| 799 | if (strchr(tracepoint_name, ',')) { |
| 800 | ERR("Comma separated tracepoint names are not supported."); |
| 801 | goto error; |
| 802 | } |
| 803 | |
| 804 | /* |
| 805 | * Update *argc and *argv so our caller can keep parsing what follows. |
| 806 | */ |
| 807 | consumed_args = argpar_state_get_ingested_orig_args(state); |
| 808 | assert(consumed_args >= 0); |
| 809 | *argc -= consumed_args; |
| 810 | *argv += consumed_args; |
| 811 | |
| 812 | /* Need to specify a domain. */ |
| 813 | if (domain_type == LTTNG_DOMAIN_NONE) { |
| 814 | ERR("Please specify a domain (--kernel/--userspace/--jul/--log4j/--python)."); |
| 815 | goto error; |
| 816 | } |
| 817 | |
| 818 | /* Validate event rule type against domain. */ |
| 819 | switch (event_rule_type) { |
| 820 | case LTTNG_EVENT_RULE_TYPE_KPROBE: |
| 821 | case LTTNG_EVENT_RULE_TYPE_KRETPROBE: |
| 822 | case LTTNG_EVENT_RULE_TYPE_UPROBE: |
| 823 | case LTTNG_EVENT_RULE_TYPE_SYSCALL: |
| 824 | if (domain_type != LTTNG_DOMAIN_KERNEL) { |
| 825 | ERR("Event type not available for user-space tracing."); |
| 826 | goto error; |
| 827 | } |
| 828 | break; |
| 829 | |
| 830 | case LTTNG_EVENT_RULE_TYPE_TRACEPOINT: |
| 831 | break; |
| 832 | |
| 833 | default: |
| 834 | abort(); |
| 835 | } |
| 836 | |
| 837 | /* |
| 838 | * Adding a filter to a probe, function or userspace-probe would be |
| 839 | * denied by the kernel tracer as it's not supported at the moment. We |
| 840 | * do an early check here to warn the user. |
| 841 | */ |
| 842 | if (filter && domain_type == LTTNG_DOMAIN_KERNEL) { |
| 843 | switch (event_rule_type) { |
| 844 | case LTTNG_EVENT_RULE_TYPE_TRACEPOINT: |
| 845 | case LTTNG_EVENT_RULE_TYPE_SYSCALL: |
| 846 | break; |
| 847 | default: |
| 848 | ERR("Filter expressions are not supported for %s event rules.", |
| 849 | lttng_event_rule_type_str(event_rule_type)); |
| 850 | goto error; |
| 851 | } |
| 852 | } |
| 853 | |
| 854 | /* If --exclude/-x was passed, split it into an exclusion list. */ |
| 855 | if (exclude) { |
| 856 | if (domain_type != LTTNG_DOMAIN_UST) { |
| 857 | ERR("Event name exclusions are not yet implemented for %s event rules.", |
| 858 | get_domain_str(domain_type)); |
| 859 | goto error; |
| 860 | } |
| 861 | |
| 862 | |
| 863 | if (create_exclusion_list_and_validate(tracepoint_name, exclude, |
| 864 | &exclusion_list) != 0) { |
| 865 | ERR("Failed to create exclusion list."); |
| 866 | goto error; |
| 867 | } |
| 868 | } |
| 869 | |
| 870 | if (loglevel_str && event_rule_type != LTTNG_EVENT_RULE_TYPE_TRACEPOINT) { |
| 871 | ERR("Log levels are only applicable to tracepoint event rules."); |
| 872 | goto error; |
| 873 | } |
| 874 | |
| 875 | /* Finally, create the event rule object. */ |
| 876 | switch (event_rule_type) { |
| 877 | case LTTNG_EVENT_RULE_TYPE_TRACEPOINT: |
| 878 | { |
| 879 | enum lttng_event_rule_status event_rule_status; |
| 880 | |
| 881 | res.er = lttng_event_rule_tracepoint_create(domain_type); |
| 882 | if (!res.er) { |
| 883 | ERR("Failed to create tracepoint event rule."); |
| 884 | goto error; |
| 885 | } |
| 886 | |
| 887 | /* Set pattern. */ |
| 888 | event_rule_status = lttng_event_rule_tracepoint_set_pattern( |
| 889 | res.er, tracepoint_name); |
| 890 | if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) { |
| 891 | ERR("Failed to set tracepoint event rule's pattern to '%s'.", |
| 892 | tracepoint_name); |
| 893 | goto error; |
| 894 | } |
| 895 | |
| 896 | /* Set filter. */ |
| 897 | if (filter) { |
| 898 | event_rule_status = lttng_event_rule_tracepoint_set_filter( |
| 899 | res.er, filter); |
| 900 | if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) { |
| 901 | ERR("Failed to set tracepoint event rule's filter to '%s'.", |
| 902 | filter); |
| 903 | goto error; |
| 904 | } |
| 905 | } |
| 906 | |
| 907 | /* Set exclusion list. */ |
| 908 | if (exclusion_list) { |
| 909 | int n; |
| 910 | |
| 911 | for (n = 0; exclusion_list[n]; n++) { |
| 912 | event_rule_status = lttng_event_rule_tracepoint_add_exclusion( |
| 913 | res.er, |
| 914 | exclusion_list[n]); |
| 915 | if (event_rule_status != |
| 916 | LTTNG_EVENT_RULE_STATUS_OK) { |
| 917 | ERR("Failed to set tracepoint exclusion list element '%s'", |
| 918 | exclusion_list[n]); |
| 919 | goto error; |
| 920 | } |
| 921 | } |
| 922 | } |
| 923 | |
| 924 | if (loglevel_str) { |
| 925 | int loglevel; |
| 926 | |
| 927 | if (domain_type == LTTNG_DOMAIN_KERNEL) { |
| 928 | ERR("Log levels are not supported by the kernel tracer."); |
| 929 | goto error; |
| 930 | } |
| 931 | |
| 932 | loglevel = parse_loglevel_string( |
| 933 | loglevel_str, domain_type); |
| 934 | if (loglevel < 0) { |
| 935 | ERR("Failed to parse `%s` as a log level.", |
| 936 | loglevel_str); |
| 937 | goto error; |
| 938 | } |
| 939 | |
| 940 | if (loglevel_only) { |
| 941 | event_rule_status = lttng_event_rule_tracepoint_set_log_level( |
| 942 | res.er, |
| 943 | loglevel); |
| 944 | } else { |
| 945 | event_rule_status = lttng_event_rule_tracepoint_set_log_level_range_lower_bound( |
| 946 | res.er, |
| 947 | loglevel); |
| 948 | } |
| 949 | |
| 950 | if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) { |
| 951 | ERR("Failed to set log level on event fule."); |
| 952 | goto error; |
| 953 | } |
| 954 | } |
| 955 | |
| 956 | break; |
| 957 | } |
| 958 | case LTTNG_EVENT_RULE_TYPE_KPROBE: |
| 959 | { |
| 960 | int ret; |
| 961 | enum lttng_event_rule_status event_rule_status; |
| 962 | |
| 963 | res.er = lttng_event_rule_kprobe_create(); |
| 964 | if (!res.er) { |
| 965 | ERR("Failed to create kprobe event rule."); |
| 966 | goto error; |
| 967 | } |
| 968 | |
| 969 | ret = parse_kernel_probe_opts(source, &kernel_probe_location); |
| 970 | if (ret) { |
| 971 | ERR("Failed to parse kernel probe location."); |
| 972 | goto error; |
| 973 | } |
| 974 | |
| 975 | event_rule_status = lttng_event_rule_kprobe_set_name(res.er, tracepoint_name); |
| 976 | if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) { |
| 977 | ERR("Failed to set kprobe event rule's name to '%s'.", tracepoint_name); |
| 978 | goto error; |
| 979 | } |
| 980 | |
| 981 | assert(kernel_probe_location); |
| 982 | event_rule_status = lttng_event_rule_kprobe_set_location(res.er, kernel_probe_location); |
| 983 | if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) { |
| 984 | ERR("Failed to set kprobe event rule's location."); |
| 985 | goto error; |
| 986 | } |
| 987 | |
| 988 | break; |
| 989 | } |
| 990 | case LTTNG_EVENT_RULE_TYPE_UPROBE: |
| 991 | { |
| 992 | int ret; |
| 993 | enum lttng_event_rule_status event_rule_status; |
| 994 | |
| 995 | ret = parse_userspace_probe_opts( |
| 996 | source, &userspace_probe_location); |
| 997 | if (ret) { |
| 998 | ERR("Failed to parse user space probe location."); |
| 999 | goto error; |
| 1000 | } |
| 1001 | |
| 1002 | res.er = lttng_event_rule_uprobe_create(); |
| 1003 | if (!res.er) { |
| 1004 | ERR("Failed to create userspace probe event rule."); |
| 1005 | goto error; |
| 1006 | } |
| 1007 | |
| 1008 | event_rule_status = lttng_event_rule_uprobe_set_location( |
| 1009 | res.er, userspace_probe_location); |
| 1010 | if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) { |
| 1011 | ERR("Failed to set user space probe event rule's location."); |
| 1012 | goto error; |
| 1013 | } |
| 1014 | |
| 1015 | event_rule_status = lttng_event_rule_uprobe_set_name( |
| 1016 | res.er, tracepoint_name); |
| 1017 | if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) { |
| 1018 | ERR("Failed to set user space probe event rule's name to '%s'.", |
| 1019 | tracepoint_name); |
| 1020 | goto error; |
| 1021 | } |
| 1022 | |
| 1023 | break; |
| 1024 | } |
| 1025 | case LTTNG_EVENT_RULE_TYPE_SYSCALL: |
| 1026 | { |
| 1027 | enum lttng_event_rule_status event_rule_status; |
| 1028 | |
| 1029 | res.er = lttng_event_rule_syscall_create(); |
| 1030 | if (!res.er) { |
| 1031 | ERR("Failed to create syscall event rule."); |
| 1032 | goto error; |
| 1033 | } |
| 1034 | |
| 1035 | event_rule_status = lttng_event_rule_syscall_set_pattern( |
| 1036 | res.er, tracepoint_name); |
| 1037 | if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) { |
| 1038 | ERR("Failed to set syscall event rule's pattern to '%s'.", |
| 1039 | tracepoint_name); |
| 1040 | goto error; |
| 1041 | } |
| 1042 | |
| 1043 | if (filter) { |
| 1044 | event_rule_status = lttng_event_rule_syscall_set_filter( |
| 1045 | res.er, filter); |
| 1046 | if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) { |
| 1047 | ERR("Failed to set syscall event rule's filter to '%s'.", |
| 1048 | filter); |
| 1049 | goto error; |
| 1050 | } |
| 1051 | } |
| 1052 | |
| 1053 | break; |
| 1054 | } |
| 1055 | default: |
| 1056 | abort(); |
| 1057 | goto error; |
| 1058 | } |
| 1059 | |
| 1060 | goto end; |
| 1061 | |
| 1062 | error: |
| 1063 | lttng_event_rule_destroy(res.er); |
| 1064 | res.er = NULL; |
| 1065 | lttng_dynamic_pointer_array_reset(&res.capture_descriptors); |
| 1066 | |
| 1067 | end: |
| 1068 | if (parser_ctx) { |
| 1069 | filter_parser_ctx_free(parser_ctx); |
| 1070 | } |
| 1071 | |
| 1072 | lttng_event_expr_destroy(event_expr); |
| 1073 | argpar_item_destroy(item); |
| 1074 | free(error); |
| 1075 | argpar_state_destroy(state); |
| 1076 | free(filter); |
| 1077 | free(exclude); |
| 1078 | free(loglevel_str); |
| 1079 | free(source); |
| 1080 | strutils_free_null_terminated_array_of_strings(exclusion_list); |
| 1081 | lttng_kernel_probe_location_destroy(kernel_probe_location); |
| 1082 | lttng_userspace_probe_location_destroy(userspace_probe_location); |
| 1083 | return res; |
| 1084 | } |
| 1085 | |
| 1086 | static |
| 1087 | struct lttng_condition *handle_condition_event(int *argc, const char ***argv) |
| 1088 | { |
| 1089 | struct parse_event_rule_res res; |
| 1090 | struct lttng_condition *c; |
| 1091 | size_t i; |
| 1092 | |
| 1093 | res = parse_event_rule(argc, argv); |
| 1094 | if (!res.er) { |
| 1095 | c = NULL; |
| 1096 | goto error; |
| 1097 | } |
| 1098 | |
| 1099 | c = lttng_condition_event_rule_create(res.er); |
| 1100 | lttng_event_rule_destroy(res.er); |
| 1101 | res.er = NULL; |
| 1102 | if (!c) { |
| 1103 | goto error; |
| 1104 | } |
| 1105 | |
| 1106 | for (i = 0; i < lttng_dynamic_pointer_array_get_count(&res.capture_descriptors); |
| 1107 | i++) { |
| 1108 | enum lttng_condition_status status; |
| 1109 | struct lttng_event_expr **expr = |
| 1110 | lttng_dynamic_array_get_element( |
| 1111 | &res.capture_descriptors.array, i); |
| 1112 | |
| 1113 | assert(expr); |
| 1114 | assert(*expr); |
| 1115 | status = lttng_condition_event_rule_append_capture_descriptor( |
| 1116 | c, *expr); |
| 1117 | if (status != LTTNG_CONDITION_STATUS_OK) { |
| 1118 | if (status == LTTNG_CONDITION_STATUS_UNSUPPORTED) { |
| 1119 | ERR("The capture feature is unsupported by the event-rule condition type"); |
| 1120 | } |
| 1121 | |
| 1122 | goto error; |
| 1123 | } |
| 1124 | |
| 1125 | /* Ownership of event expression moved to `c` */ |
| 1126 | *expr = NULL; |
| 1127 | } |
| 1128 | |
| 1129 | goto end; |
| 1130 | |
| 1131 | error: |
| 1132 | lttng_condition_destroy(c); |
| 1133 | c = NULL; |
| 1134 | |
| 1135 | end: |
| 1136 | lttng_dynamic_pointer_array_reset(&res.capture_descriptors); |
| 1137 | lttng_event_rule_destroy(res.er); |
| 1138 | return c; |
| 1139 | } |
| 1140 | |
| 1141 | static |
| 1142 | struct lttng_condition *handle_condition_session_consumed_size(int *argc, const char ***argv) |
| 1143 | { |
| 1144 | struct lttng_condition *cond = NULL; |
| 1145 | struct argpar_state *state = NULL; |
| 1146 | struct argpar_item *item = NULL; |
| 1147 | const char *threshold_arg = NULL; |
| 1148 | const char *session_name_arg = NULL; |
| 1149 | uint64_t threshold; |
| 1150 | char *error = NULL; |
| 1151 | enum lttng_condition_status condition_status; |
| 1152 | |
| 1153 | state = argpar_state_create(*argc, *argv, event_rule_opt_descrs); |
| 1154 | if (!state) { |
| 1155 | ERR("Failed to allocate an argpar state."); |
| 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 | ERR("%s", 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 | const struct argpar_item_opt *item_opt = |
| 1178 | (const struct argpar_item_opt *) item; |
| 1179 | |
| 1180 | switch (item_opt->descr->id) { |
| 1181 | default: |
| 1182 | abort(); |
| 1183 | } |
| 1184 | } else { |
| 1185 | const struct argpar_item_non_opt *item_non_opt; |
| 1186 | |
| 1187 | assert(item->type == ARGPAR_ITEM_TYPE_NON_OPT); |
| 1188 | |
| 1189 | item_non_opt = (const struct argpar_item_non_opt *) item; |
| 1190 | |
| 1191 | switch (item_non_opt->non_opt_index) { |
| 1192 | case 0: |
| 1193 | session_name_arg = item_non_opt->arg; |
| 1194 | break; |
| 1195 | case 1: |
| 1196 | threshold_arg = item_non_opt->arg; |
| 1197 | break; |
| 1198 | default: |
| 1199 | ERR("Unexpected argument `%s`.", |
| 1200 | item_non_opt->arg); |
| 1201 | goto error; |
| 1202 | } |
| 1203 | } |
| 1204 | } |
| 1205 | |
| 1206 | *argc -= argpar_state_get_ingested_orig_args(state); |
| 1207 | *argv += argpar_state_get_ingested_orig_args(state); |
| 1208 | |
| 1209 | if (!session_name_arg) { |
| 1210 | ERR("Missing session name argument."); |
| 1211 | goto error; |
| 1212 | } |
| 1213 | |
| 1214 | if (!threshold_arg) { |
| 1215 | ERR("Missing threshold argument."); |
| 1216 | goto error; |
| 1217 | } |
| 1218 | |
| 1219 | if (utils_parse_size_suffix(threshold_arg, &threshold) != 0) { |
| 1220 | ERR("Failed to parse `%s` as a size.", threshold_arg); |
| 1221 | goto error; |
| 1222 | } |
| 1223 | |
| 1224 | cond = lttng_condition_session_consumed_size_create(); |
| 1225 | if (!cond) { |
| 1226 | ERR("Failed to allocate a session consumed size condition."); |
| 1227 | goto error; |
| 1228 | } |
| 1229 | |
| 1230 | condition_status = lttng_condition_session_consumed_size_set_session_name( |
| 1231 | cond, session_name_arg); |
| 1232 | if (condition_status != LTTNG_CONDITION_STATUS_OK) { |
| 1233 | ERR("Failed to set session consumed size condition's session name to '%s'.", |
| 1234 | session_name_arg); |
| 1235 | goto error; |
| 1236 | } |
| 1237 | |
| 1238 | condition_status = lttng_condition_session_consumed_size_set_threshold( |
| 1239 | cond, threshold); |
| 1240 | if (condition_status != LTTNG_CONDITION_STATUS_OK) { |
| 1241 | ERR("Failed to set session consumed size condition threshold."); |
| 1242 | goto error; |
| 1243 | } |
| 1244 | |
| 1245 | goto end; |
| 1246 | |
| 1247 | error: |
| 1248 | lttng_condition_destroy(cond); |
| 1249 | cond = NULL; |
| 1250 | |
| 1251 | end: |
| 1252 | argpar_state_destroy(state); |
| 1253 | argpar_item_destroy(item); |
| 1254 | free(error); |
| 1255 | return cond; |
| 1256 | } |
| 1257 | |
| 1258 | static |
| 1259 | struct lttng_condition *handle_condition_buffer_usage_high(int *argc, const char ***argv) |
| 1260 | { |
| 1261 | ERR("High buffer usage threshold conditions are unsupported for the moment."); |
| 1262 | return NULL; |
| 1263 | } |
| 1264 | |
| 1265 | static |
| 1266 | struct lttng_condition *handle_condition_buffer_usage_low(int *argc, const char ***argv) |
| 1267 | { |
| 1268 | ERR("Low buffer usage threshold conditions are unsupported for the moment."); |
| 1269 | return NULL; |
| 1270 | } |
| 1271 | |
| 1272 | static |
| 1273 | struct lttng_condition *handle_condition_session_rotation_ongoing(int *argc, const char ***argv) |
| 1274 | { |
| 1275 | ERR("Session rotation ongoing conditions are unsupported for the moment."); |
| 1276 | return NULL; |
| 1277 | } |
| 1278 | |
| 1279 | static |
| 1280 | struct lttng_condition *handle_condition_session_rotation_completed(int *argc, const char ***argv) |
| 1281 | { |
| 1282 | ERR("Session rotation completed conditions are unsupported for the moment."); |
| 1283 | return NULL; |
| 1284 | } |
| 1285 | |
| 1286 | struct condition_descr { |
| 1287 | const char *name; |
| 1288 | struct lttng_condition *(*handler) (int *argc, const char ***argv); |
| 1289 | }; |
| 1290 | |
| 1291 | static const |
| 1292 | struct condition_descr condition_descrs[] = { |
| 1293 | { "on-event", handle_condition_event }, |
| 1294 | { "on-session-consumed-size", handle_condition_session_consumed_size }, |
| 1295 | { "on-buffer-usage-high", handle_condition_buffer_usage_high }, |
| 1296 | { "on-buffer-usage-low", handle_condition_buffer_usage_low }, |
| 1297 | { "on-session-rotation-ongoing", handle_condition_session_rotation_ongoing }, |
| 1298 | { "on-session-rotation-completed", handle_condition_session_rotation_completed }, |
| 1299 | }; |
| 1300 | |
| 1301 | static |
| 1302 | struct lttng_condition *parse_condition(int *argc, const char ***argv) |
| 1303 | { |
| 1304 | int i; |
| 1305 | struct lttng_condition *cond; |
| 1306 | const char *condition_name; |
| 1307 | const struct condition_descr *descr = NULL; |
| 1308 | |
| 1309 | if (*argc == 0) { |
| 1310 | ERR("Missing condition name."); |
| 1311 | goto error; |
| 1312 | } |
| 1313 | |
| 1314 | condition_name = (*argv)[0]; |
| 1315 | |
| 1316 | (*argc)--; |
| 1317 | (*argv)++; |
| 1318 | |
| 1319 | for (i = 0; i < ARRAY_SIZE(condition_descrs); i++) { |
| 1320 | if (strcmp(condition_name, condition_descrs[i].name) == 0) { |
| 1321 | descr = &condition_descrs[i]; |
| 1322 | break; |
| 1323 | } |
| 1324 | } |
| 1325 | |
| 1326 | if (!descr) { |
| 1327 | ERR("Unknown condition name '%s'", condition_name); |
| 1328 | goto error; |
| 1329 | } |
| 1330 | |
| 1331 | cond = descr->handler(argc, argv); |
| 1332 | if (!cond) { |
| 1333 | /* The handler has already printed an error message. */ |
| 1334 | goto error; |
| 1335 | } |
| 1336 | |
| 1337 | goto end; |
| 1338 | error: |
| 1339 | cond = NULL; |
| 1340 | end: |
| 1341 | return cond; |
| 1342 | } |
| 1343 | |
| 1344 | |
| 1345 | static |
| 1346 | struct lttng_action *handle_action_notify(int *argc, const char ***argv) |
| 1347 | { |
| 1348 | return lttng_action_notify_create(); |
| 1349 | } |
| 1350 | |
| 1351 | static const struct argpar_opt_descr no_opt_descrs[] = { |
| 1352 | ARGPAR_OPT_DESCR_SENTINEL |
| 1353 | }; |
| 1354 | |
| 1355 | /* |
| 1356 | * Generic handler for a kind of action that takes a session name as its sole |
| 1357 | * argument. |
| 1358 | */ |
| 1359 | |
| 1360 | static |
| 1361 | struct lttng_action *handle_action_simple_session( |
| 1362 | int *argc, const char ***argv, |
| 1363 | struct lttng_action *(*create_action_cb)(void), |
| 1364 | enum lttng_action_status (*set_session_name_cb)(struct lttng_action *, const char *), |
| 1365 | const char *action_name) |
| 1366 | { |
| 1367 | struct lttng_action *action = NULL; |
| 1368 | struct argpar_state *state = NULL; |
| 1369 | struct argpar_item *item = NULL; |
| 1370 | const char *session_name_arg = NULL; |
| 1371 | char *error = NULL; |
| 1372 | enum lttng_action_status action_status; |
| 1373 | |
| 1374 | state = argpar_state_create(*argc, *argv, no_opt_descrs); |
| 1375 | if (!state) { |
| 1376 | ERR("Failed to allocate an argpar state."); |
| 1377 | goto error; |
| 1378 | } |
| 1379 | |
| 1380 | while (true) { |
| 1381 | enum argpar_state_parse_next_status status; |
| 1382 | const struct argpar_item_non_opt *item_non_opt; |
| 1383 | |
| 1384 | ARGPAR_ITEM_DESTROY_AND_RESET(item); |
| 1385 | status = argpar_state_parse_next(state, &item, &error); |
| 1386 | if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR) { |
| 1387 | ERR("%s", error); |
| 1388 | goto error; |
| 1389 | } else if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR_UNKNOWN_OPT) { |
| 1390 | /* Just stop parsing here. */ |
| 1391 | break; |
| 1392 | } else if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_END) { |
| 1393 | break; |
| 1394 | } |
| 1395 | |
| 1396 | assert(status == ARGPAR_STATE_PARSE_NEXT_STATUS_OK); |
| 1397 | assert(item->type == ARGPAR_ITEM_TYPE_NON_OPT); |
| 1398 | |
| 1399 | item_non_opt = (const struct argpar_item_non_opt *) item; |
| 1400 | |
| 1401 | switch (item_non_opt->non_opt_index) { |
| 1402 | case 0: |
| 1403 | session_name_arg = item_non_opt->arg; |
| 1404 | break; |
| 1405 | default: |
| 1406 | ERR("Unexpected argument `%s`.", item_non_opt->arg); |
| 1407 | goto error; |
| 1408 | } |
| 1409 | } |
| 1410 | |
| 1411 | *argc -= argpar_state_get_ingested_orig_args(state); |
| 1412 | *argv += argpar_state_get_ingested_orig_args(state); |
| 1413 | |
| 1414 | if (!session_name_arg) { |
| 1415 | ERR("Missing session name."); |
| 1416 | goto error; |
| 1417 | } |
| 1418 | |
| 1419 | action = create_action_cb(); |
| 1420 | if (!action) { |
| 1421 | ERR("Failed to allocate %s session action.", action_name); |
| 1422 | goto error; |
| 1423 | } |
| 1424 | |
| 1425 | action_status = set_session_name_cb(action, session_name_arg); |
| 1426 | if (action_status != LTTNG_ACTION_STATUS_OK) { |
| 1427 | ERR("Failed to set action %s session's session name to '%s'.", |
| 1428 | action_name, session_name_arg); |
| 1429 | goto error; |
| 1430 | } |
| 1431 | |
| 1432 | goto end; |
| 1433 | |
| 1434 | error: |
| 1435 | lttng_action_destroy(action); |
| 1436 | action = NULL; |
| 1437 | argpar_item_destroy(item); |
| 1438 | end: |
| 1439 | free(error); |
| 1440 | argpar_state_destroy(state); |
| 1441 | return action; |
| 1442 | } |
| 1443 | |
| 1444 | static |
| 1445 | struct lttng_action *handle_action_start_session(int *argc, |
| 1446 | const char ***argv) |
| 1447 | { |
| 1448 | return handle_action_simple_session(argc, argv, |
| 1449 | lttng_action_start_session_create, |
| 1450 | lttng_action_start_session_set_session_name, |
| 1451 | "start"); |
| 1452 | } |
| 1453 | |
| 1454 | static |
| 1455 | struct lttng_action *handle_action_stop_session(int *argc, |
| 1456 | const char ***argv) |
| 1457 | { |
| 1458 | return handle_action_simple_session(argc, argv, |
| 1459 | lttng_action_stop_session_create, |
| 1460 | lttng_action_stop_session_set_session_name, |
| 1461 | "stop"); |
| 1462 | } |
| 1463 | |
| 1464 | static |
| 1465 | struct lttng_action *handle_action_rotate_session(int *argc, |
| 1466 | const char ***argv) |
| 1467 | { |
| 1468 | return handle_action_simple_session(argc, argv, |
| 1469 | lttng_action_rotate_session_create, |
| 1470 | lttng_action_rotate_session_set_session_name, |
| 1471 | "rotate"); |
| 1472 | } |
| 1473 | |
| 1474 | static const struct argpar_opt_descr snapshot_action_opt_descrs[] = { |
| 1475 | { OPT_NAME, 'n', "name", true }, |
| 1476 | { OPT_MAX_SIZE, 'm', "max-size", true }, |
| 1477 | { OPT_CTRL_URL, '\0', "ctrl-url", true }, |
| 1478 | { OPT_DATA_URL, '\0', "data-url", true }, |
| 1479 | { OPT_URL, '\0', "url", true }, |
| 1480 | { OPT_PATH, '\0', "path", true }, |
| 1481 | ARGPAR_OPT_DESCR_SENTINEL |
| 1482 | }; |
| 1483 | |
| 1484 | static |
| 1485 | struct lttng_action *handle_action_snapshot_session(int *argc, |
| 1486 | const char ***argv) |
| 1487 | { |
| 1488 | struct lttng_action *action = NULL; |
| 1489 | struct argpar_state *state = NULL; |
| 1490 | struct argpar_item *item = NULL; |
| 1491 | const char *session_name_arg = NULL; |
| 1492 | char *snapshot_name_arg = NULL; |
| 1493 | char *ctrl_url_arg = NULL; |
| 1494 | char *data_url_arg = NULL; |
| 1495 | char *max_size_arg = NULL; |
| 1496 | char *url_arg = NULL; |
| 1497 | char *path_arg = NULL; |
| 1498 | char *error = NULL; |
| 1499 | enum lttng_action_status action_status; |
| 1500 | struct lttng_snapshot_output *snapshot_output = NULL; |
| 1501 | int ret; |
| 1502 | unsigned int locations_specified = 0; |
| 1503 | |
| 1504 | state = argpar_state_create(*argc, *argv, snapshot_action_opt_descrs); |
| 1505 | if (!state) { |
| 1506 | ERR("Failed to allocate an argpar state."); |
| 1507 | goto error; |
| 1508 | } |
| 1509 | |
| 1510 | while (true) { |
| 1511 | enum argpar_state_parse_next_status status; |
| 1512 | |
| 1513 | ARGPAR_ITEM_DESTROY_AND_RESET(item); |
| 1514 | status = argpar_state_parse_next(state, &item, &error); |
| 1515 | if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR) { |
| 1516 | ERR("%s", error); |
| 1517 | goto error; |
| 1518 | } else if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR_UNKNOWN_OPT) { |
| 1519 | /* Just stop parsing here. */ |
| 1520 | break; |
| 1521 | } else if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_END) { |
| 1522 | break; |
| 1523 | } |
| 1524 | |
| 1525 | assert(status == ARGPAR_STATE_PARSE_NEXT_STATUS_OK); |
| 1526 | |
| 1527 | if (item->type == ARGPAR_ITEM_TYPE_OPT) { |
| 1528 | const struct argpar_item_opt *item_opt = |
| 1529 | (const struct argpar_item_opt *) item; |
| 1530 | |
| 1531 | switch (item_opt->descr->id) { |
| 1532 | case OPT_NAME: |
| 1533 | if (!assign_string(&snapshot_name_arg, item_opt->arg, "--name/-n")) { |
| 1534 | goto error; |
| 1535 | } |
| 1536 | |
| 1537 | break; |
| 1538 | case OPT_MAX_SIZE: |
| 1539 | if (!assign_string(&max_size_arg, item_opt->arg, "--max-size/-m")) { |
| 1540 | goto error; |
| 1541 | } |
| 1542 | |
| 1543 | break; |
| 1544 | case OPT_CTRL_URL: |
| 1545 | if (!assign_string(&ctrl_url_arg, item_opt->arg, "--ctrl-url")) { |
| 1546 | goto error; |
| 1547 | } |
| 1548 | |
| 1549 | break; |
| 1550 | case OPT_DATA_URL: |
| 1551 | if (!assign_string(&data_url_arg, item_opt->arg, "--data-url")) { |
| 1552 | goto error; |
| 1553 | } |
| 1554 | |
| 1555 | break; |
| 1556 | case OPT_URL: |
| 1557 | if (!assign_string(&url_arg, item_opt->arg, "--url")) { |
| 1558 | goto error; |
| 1559 | } |
| 1560 | |
| 1561 | break; |
| 1562 | case OPT_PATH: |
| 1563 | if (!assign_string(&path_arg, item_opt->arg, "--path")) { |
| 1564 | goto error; |
| 1565 | } |
| 1566 | |
| 1567 | break; |
| 1568 | default: |
| 1569 | abort(); |
| 1570 | } |
| 1571 | } else { |
| 1572 | const struct argpar_item_non_opt *item_non_opt; |
| 1573 | |
| 1574 | assert(item->type == ARGPAR_ITEM_TYPE_NON_OPT); |
| 1575 | |
| 1576 | item_non_opt = (const struct argpar_item_non_opt *) item; |
| 1577 | |
| 1578 | switch (item_non_opt->non_opt_index) { |
| 1579 | case 0: |
| 1580 | session_name_arg = item_non_opt->arg; |
| 1581 | break; |
| 1582 | default: |
| 1583 | ERR("Unexpected argument `%s`.", |
| 1584 | item_non_opt->arg); |
| 1585 | goto error; |
| 1586 | } |
| 1587 | } |
| 1588 | } |
| 1589 | |
| 1590 | *argc -= argpar_state_get_ingested_orig_args(state); |
| 1591 | *argv += argpar_state_get_ingested_orig_args(state); |
| 1592 | |
| 1593 | if (!session_name_arg) { |
| 1594 | ERR("Missing session name."); |
| 1595 | goto error; |
| 1596 | } |
| 1597 | |
| 1598 | /* --ctrl-url and --data-url must come in pair. */ |
| 1599 | if (ctrl_url_arg && !data_url_arg) { |
| 1600 | ERR("--ctrl-url is specified, but --data-url is missing."); |
| 1601 | goto error; |
| 1602 | } |
| 1603 | |
| 1604 | if (!ctrl_url_arg && data_url_arg) { |
| 1605 | ERR("--data-url is specified, but --ctrl-url is missing."); |
| 1606 | goto error; |
| 1607 | } |
| 1608 | |
| 1609 | locations_specified += !!(ctrl_url_arg || data_url_arg); |
| 1610 | locations_specified += !!url_arg; |
| 1611 | locations_specified += !!path_arg; |
| 1612 | |
| 1613 | /* --ctrl-url/--data-url, --url and --path are mutually exclusive. */ |
| 1614 | if (locations_specified > 1) { |
| 1615 | ERR("The --ctrl-url/--data-url, --url, and --path options can't be used together."); |
| 1616 | goto error; |
| 1617 | } |
| 1618 | |
| 1619 | /* |
| 1620 | * Did the user specify an option that implies using a |
| 1621 | * custom/unregistered output? |
| 1622 | */ |
| 1623 | if (url_arg || ctrl_url_arg || path_arg) { |
| 1624 | snapshot_output = lttng_snapshot_output_create(); |
| 1625 | if (!snapshot_output) { |
| 1626 | ERR("Failed to allocate a snapshot output."); |
| 1627 | goto error; |
| 1628 | } |
| 1629 | } |
| 1630 | |
| 1631 | action = lttng_action_snapshot_session_create(); |
| 1632 | if (!action) { |
| 1633 | ERR("Failed to allocate snapshot session action."); |
| 1634 | goto error; |
| 1635 | } |
| 1636 | |
| 1637 | action_status = lttng_action_snapshot_session_set_session_name( |
| 1638 | action, session_name_arg); |
| 1639 | if (action_status != LTTNG_ACTION_STATUS_OK) { |
| 1640 | ERR("Failed to set action snapshot session's session name to '%s'.", |
| 1641 | session_name_arg); |
| 1642 | goto error; |
| 1643 | } |
| 1644 | |
| 1645 | if (snapshot_name_arg) { |
| 1646 | if (!snapshot_output) { |
| 1647 | ERR("Can't provide a snapshot output name without a snapshot output destination."); |
| 1648 | goto error; |
| 1649 | } |
| 1650 | |
| 1651 | ret = lttng_snapshot_output_set_name( |
| 1652 | snapshot_name_arg, snapshot_output); |
| 1653 | if (ret != 0) { |
| 1654 | ERR("Failed to set name of snapshot output."); |
| 1655 | goto error; |
| 1656 | } |
| 1657 | } |
| 1658 | |
| 1659 | if (max_size_arg) { |
| 1660 | uint64_t max_size; |
| 1661 | |
| 1662 | if (!snapshot_output) { |
| 1663 | ERR("Can't provide a snapshot output max size without a snapshot output destination."); |
| 1664 | goto error; |
| 1665 | } |
| 1666 | |
| 1667 | ret = utils_parse_size_suffix(max_size_arg, &max_size); |
| 1668 | if (ret != 0) { |
| 1669 | ERR("Failed to parse `%s` as a size.", max_size_arg); |
| 1670 | goto error; |
| 1671 | } |
| 1672 | |
| 1673 | ret = lttng_snapshot_output_set_size(max_size, snapshot_output); |
| 1674 | if (ret != 0) { |
| 1675 | ERR("Failed to set snapshot output's max size to %" PRIu64 " bytes.", |
| 1676 | max_size); |
| 1677 | goto error; |
| 1678 | } |
| 1679 | } |
| 1680 | |
| 1681 | if (url_arg) { |
| 1682 | int num_uris; |
| 1683 | struct lttng_uri *uris; |
| 1684 | |
| 1685 | if (!strstr(url_arg, "://")) { |
| 1686 | ERR("Failed to parse '%s' as an URL.", url_arg); |
| 1687 | goto error; |
| 1688 | } |
| 1689 | |
| 1690 | num_uris = uri_parse_str_urls(url_arg, NULL, &uris); |
| 1691 | if (num_uris < 1) { |
| 1692 | ERR("Failed to parse '%s' as an URL.", url_arg); |
| 1693 | goto error; |
| 1694 | } |
| 1695 | |
| 1696 | if (uris[0].dtype == LTTNG_DST_PATH) { |
| 1697 | ret = lttng_snapshot_output_set_local_path( |
| 1698 | uris[0].dst.path, snapshot_output); |
| 1699 | free(uris); |
| 1700 | if (ret != 0) { |
| 1701 | ERR("Failed to assign '%s' as a local destination.", |
| 1702 | url_arg); |
| 1703 | goto error; |
| 1704 | } |
| 1705 | } else { |
| 1706 | ret = lttng_snapshot_output_set_network_url( |
| 1707 | url_arg, snapshot_output); |
| 1708 | free(uris); |
| 1709 | if (ret != 0) { |
| 1710 | ERR("Failed to assign '%s' as a network URL.", |
| 1711 | url_arg); |
| 1712 | goto error; |
| 1713 | } |
| 1714 | } |
| 1715 | } |
| 1716 | |
| 1717 | if (path_arg) { |
| 1718 | ret = lttng_snapshot_output_set_local_path( |
| 1719 | path_arg, snapshot_output); |
| 1720 | if (ret != 0) { |
| 1721 | ERR("Failed to parse '%s' as a local path.", path_arg); |
| 1722 | goto error; |
| 1723 | } |
| 1724 | } |
| 1725 | |
| 1726 | if (ctrl_url_arg) { |
| 1727 | /* |
| 1728 | * Two argument form, network output with separate control and |
| 1729 | * data URLs. |
| 1730 | */ |
| 1731 | ret = lttng_snapshot_output_set_network_urls( |
| 1732 | ctrl_url_arg, data_url_arg, snapshot_output); |
| 1733 | if (ret != 0) { |
| 1734 | ERR("Failed to parse `%s` and `%s` as control and data URLs.", |
| 1735 | ctrl_url_arg, data_url_arg); |
| 1736 | goto error; |
| 1737 | } |
| 1738 | } |
| 1739 | |
| 1740 | if (snapshot_output) { |
| 1741 | action_status = lttng_action_snapshot_session_set_output( |
| 1742 | action, snapshot_output); |
| 1743 | if (action_status != LTTNG_ACTION_STATUS_OK) { |
| 1744 | ERR("Failed to set snapshot session action's output."); |
| 1745 | goto error; |
| 1746 | } |
| 1747 | |
| 1748 | /* Ownership of `snapshot_output` has been transferred to the action. */ |
| 1749 | snapshot_output = NULL; |
| 1750 | } |
| 1751 | |
| 1752 | goto end; |
| 1753 | |
| 1754 | error: |
| 1755 | lttng_action_destroy(action); |
| 1756 | action = NULL; |
| 1757 | free(error); |
| 1758 | end: |
| 1759 | free(snapshot_name_arg); |
| 1760 | free(path_arg); |
| 1761 | free(url_arg); |
| 1762 | free(ctrl_url_arg); |
| 1763 | free(data_url_arg); |
| 1764 | free(snapshot_output); |
| 1765 | free(max_size_arg); |
| 1766 | argpar_state_destroy(state); |
| 1767 | argpar_item_destroy(item); |
| 1768 | return action; |
| 1769 | } |
| 1770 | |
| 1771 | struct action_descr { |
| 1772 | const char *name; |
| 1773 | struct lttng_action *(*handler) (int *argc, const char ***argv); |
| 1774 | }; |
| 1775 | |
| 1776 | static const |
| 1777 | struct action_descr action_descrs[] = { |
| 1778 | { "notify", handle_action_notify }, |
| 1779 | { "start-session", handle_action_start_session }, |
| 1780 | { "stop-session", handle_action_stop_session }, |
| 1781 | { "rotate-session", handle_action_rotate_session }, |
| 1782 | { "snapshot-session", handle_action_snapshot_session }, |
| 1783 | }; |
| 1784 | |
| 1785 | static |
| 1786 | struct lttng_action *parse_action(int *argc, const char ***argv) |
| 1787 | { |
| 1788 | int i; |
| 1789 | struct lttng_action *action; |
| 1790 | const char *action_name; |
| 1791 | const struct action_descr *descr = NULL; |
| 1792 | |
| 1793 | if (*argc == 0) { |
| 1794 | ERR("Missing action name."); |
| 1795 | goto error; |
| 1796 | } |
| 1797 | |
| 1798 | action_name = (*argv)[0]; |
| 1799 | |
| 1800 | (*argc)--; |
| 1801 | (*argv)++; |
| 1802 | |
| 1803 | for (i = 0; i < ARRAY_SIZE(action_descrs); i++) { |
| 1804 | if (strcmp(action_name, action_descrs[i].name) == 0) { |
| 1805 | descr = &action_descrs[i]; |
| 1806 | break; |
| 1807 | } |
| 1808 | } |
| 1809 | |
| 1810 | if (!descr) { |
| 1811 | ERR("Unknown action name: %s", action_name); |
| 1812 | goto error; |
| 1813 | } |
| 1814 | |
| 1815 | action = descr->handler(argc, argv); |
| 1816 | if (!action) { |
| 1817 | /* The handler has already printed an error message. */ |
| 1818 | goto error; |
| 1819 | } |
| 1820 | |
| 1821 | goto end; |
| 1822 | error: |
| 1823 | action = NULL; |
| 1824 | end: |
| 1825 | return action; |
| 1826 | } |
| 1827 | |
| 1828 | static const |
| 1829 | struct argpar_opt_descr add_trigger_options[] = { |
| 1830 | { OPT_HELP, 'h', "help", false }, |
| 1831 | { OPT_LIST_OPTIONS, '\0', "list-options", false }, |
| 1832 | { OPT_CONDITION, '\0', "condition", false }, |
| 1833 | { OPT_ACTION, '\0', "action", false }, |
| 1834 | { OPT_ID, '\0', "id", true }, |
| 1835 | { OPT_FIRE_ONCE_AFTER, '\0', "fire-once-after", true }, |
| 1836 | { OPT_FIRE_EVERY, '\0', "fire-every", true }, |
| 1837 | { OPT_USER_ID, '\0', "user-id", true }, |
| 1838 | ARGPAR_OPT_DESCR_SENTINEL, |
| 1839 | }; |
| 1840 | |
| 1841 | static |
| 1842 | void lttng_actions_destructor(void *p) |
| 1843 | { |
| 1844 | struct lttng_action *action = p; |
| 1845 | |
| 1846 | lttng_action_destroy(action); |
| 1847 | } |
| 1848 | |
| 1849 | int cmd_add_trigger(int argc, const char **argv) |
| 1850 | { |
| 1851 | int ret; |
| 1852 | int my_argc = argc - 1; |
| 1853 | const char **my_argv = argv + 1; |
| 1854 | struct lttng_condition *condition = NULL; |
| 1855 | struct lttng_dynamic_pointer_array actions; |
| 1856 | struct argpar_state *argpar_state = NULL; |
| 1857 | struct argpar_item *argpar_item = NULL; |
| 1858 | struct lttng_action *action_group = NULL; |
| 1859 | struct lttng_action *action = NULL; |
| 1860 | struct lttng_trigger *trigger = NULL; |
| 1861 | char *error = NULL; |
| 1862 | char *id = NULL; |
| 1863 | int i; |
| 1864 | char *fire_once_after_str = NULL; |
| 1865 | char *fire_every_str = NULL; |
| 1866 | char *user_id = NULL; |
| 1867 | |
| 1868 | lttng_dynamic_pointer_array_init(&actions, lttng_actions_destructor); |
| 1869 | |
| 1870 | while (true) { |
| 1871 | enum argpar_state_parse_next_status status; |
| 1872 | const struct argpar_item_opt *item_opt; |
| 1873 | int ingested_args; |
| 1874 | |
| 1875 | argpar_state_destroy(argpar_state); |
| 1876 | argpar_state = argpar_state_create(my_argc, my_argv, |
| 1877 | add_trigger_options); |
| 1878 | if (!argpar_state) { |
| 1879 | ERR("Failed to create argpar state."); |
| 1880 | goto error; |
| 1881 | } |
| 1882 | |
| 1883 | ARGPAR_ITEM_DESTROY_AND_RESET(argpar_item); |
| 1884 | status = argpar_state_parse_next(argpar_state, &argpar_item, &error); |
| 1885 | if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR) { |
| 1886 | ERR("%s", error); |
| 1887 | goto error; |
| 1888 | } else if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR_UNKNOWN_OPT) { |
| 1889 | ERR("%s", error); |
| 1890 | goto error; |
| 1891 | } else if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_END) { |
| 1892 | break; |
| 1893 | } |
| 1894 | |
| 1895 | assert(status == ARGPAR_STATE_PARSE_NEXT_STATUS_OK); |
| 1896 | |
| 1897 | if (argpar_item->type == ARGPAR_ITEM_TYPE_NON_OPT) { |
| 1898 | const struct argpar_item_non_opt *item_non_opt = |
| 1899 | (const struct argpar_item_non_opt *) |
| 1900 | argpar_item; |
| 1901 | |
| 1902 | ERR("Unexpected argument `%s`.", item_non_opt->arg); |
| 1903 | goto error; |
| 1904 | } |
| 1905 | |
| 1906 | item_opt = (const struct argpar_item_opt *) argpar_item; |
| 1907 | |
| 1908 | ingested_args = argpar_state_get_ingested_orig_args( |
| 1909 | argpar_state); |
| 1910 | |
| 1911 | my_argc -= ingested_args; |
| 1912 | my_argv += ingested_args; |
| 1913 | |
| 1914 | switch (item_opt->descr->id) { |
| 1915 | case OPT_HELP: |
| 1916 | SHOW_HELP(); |
| 1917 | ret = 0; |
| 1918 | goto end; |
| 1919 | case OPT_LIST_OPTIONS: |
| 1920 | list_cmd_options_argpar(stdout, add_trigger_options); |
| 1921 | ret = 0; |
| 1922 | goto end; |
| 1923 | case OPT_CONDITION: |
| 1924 | { |
| 1925 | if (condition) { |
| 1926 | ERR("A --condition was already given."); |
| 1927 | goto error; |
| 1928 | } |
| 1929 | |
| 1930 | condition = parse_condition(&my_argc, &my_argv); |
| 1931 | if (!condition) { |
| 1932 | /* |
| 1933 | * An error message was already printed by |
| 1934 | * parse_condition. |
| 1935 | */ |
| 1936 | goto error; |
| 1937 | } |
| 1938 | |
| 1939 | break; |
| 1940 | } |
| 1941 | case OPT_ACTION: |
| 1942 | { |
| 1943 | action = parse_action(&my_argc, &my_argv); |
| 1944 | if (!action) { |
| 1945 | /* |
| 1946 | * An error message was already printed by |
| 1947 | * parse_condition. |
| 1948 | */ |
| 1949 | goto error; |
| 1950 | } |
| 1951 | |
| 1952 | ret = lttng_dynamic_pointer_array_add_pointer( |
| 1953 | &actions, action); |
| 1954 | if (ret) { |
| 1955 | ERR("Failed to add pointer to pointer array."); |
| 1956 | goto error; |
| 1957 | } |
| 1958 | |
| 1959 | /* Ownership of the action was transferred to the group. */ |
| 1960 | action = NULL; |
| 1961 | |
| 1962 | break; |
| 1963 | } |
| 1964 | case OPT_ID: |
| 1965 | { |
| 1966 | if (!assign_string(&id, item_opt->arg, "--id")) { |
| 1967 | goto error; |
| 1968 | } |
| 1969 | |
| 1970 | break; |
| 1971 | } |
| 1972 | case OPT_FIRE_ONCE_AFTER: |
| 1973 | { |
| 1974 | if (!assign_string(&fire_once_after_str, item_opt->arg, |
| 1975 | "--fire-once-after")) { |
| 1976 | goto error; |
| 1977 | } |
| 1978 | |
| 1979 | break; |
| 1980 | } |
| 1981 | case OPT_FIRE_EVERY: |
| 1982 | { |
| 1983 | if (!assign_string(&fire_every_str, item_opt->arg, |
| 1984 | "--fire-every")) { |
| 1985 | goto error; |
| 1986 | } |
| 1987 | |
| 1988 | break; |
| 1989 | } |
| 1990 | case OPT_USER_ID: |
| 1991 | { |
| 1992 | if (!assign_string(&user_id, item_opt->arg, |
| 1993 | "--user-id")) { |
| 1994 | goto error; |
| 1995 | } |
| 1996 | |
| 1997 | break; |
| 1998 | } |
| 1999 | default: |
| 2000 | abort(); |
| 2001 | } |
| 2002 | } |
| 2003 | |
| 2004 | if (!condition) { |
| 2005 | ERR("Missing --condition."); |
| 2006 | goto error; |
| 2007 | } |
| 2008 | |
| 2009 | if (lttng_dynamic_pointer_array_get_count(&actions) == 0) { |
| 2010 | ERR("Need at least one --action."); |
| 2011 | goto error; |
| 2012 | } |
| 2013 | |
| 2014 | if (fire_every_str && fire_once_after_str) { |
| 2015 | ERR("Can't specify both --fire-once-after and --fire-every."); |
| 2016 | goto error; |
| 2017 | } |
| 2018 | |
| 2019 | action_group = lttng_action_group_create(); |
| 2020 | if (!action_group) { |
| 2021 | goto error; |
| 2022 | } |
| 2023 | |
| 2024 | for (i = 0; i < lttng_dynamic_pointer_array_get_count(&actions); i++) { |
| 2025 | enum lttng_action_status status; |
| 2026 | |
| 2027 | action = lttng_dynamic_pointer_array_steal_pointer(&actions, i); |
| 2028 | |
| 2029 | status = lttng_action_group_add_action(action_group, action); |
| 2030 | if (status != LTTNG_ACTION_STATUS_OK) { |
| 2031 | goto error; |
| 2032 | } |
| 2033 | |
| 2034 | /* |
| 2035 | * The `lttng_action_group_add_action()` takes a reference to |
| 2036 | * the action. We can destroy ours. |
| 2037 | */ |
| 2038 | lttng_action_destroy(action); |
| 2039 | action = NULL; |
| 2040 | } |
| 2041 | |
| 2042 | trigger = lttng_trigger_create(condition, action_group); |
| 2043 | if (!trigger) { |
| 2044 | goto error; |
| 2045 | } |
| 2046 | |
| 2047 | if (id) { |
| 2048 | enum lttng_trigger_status trigger_status = |
| 2049 | lttng_trigger_set_name(trigger, id); |
| 2050 | |
| 2051 | if (trigger_status != LTTNG_TRIGGER_STATUS_OK) { |
| 2052 | ERR("Failed to set trigger id."); |
| 2053 | goto error; |
| 2054 | } |
| 2055 | } |
| 2056 | |
| 2057 | if (fire_once_after_str) { |
| 2058 | unsigned long long threshold; |
| 2059 | enum lttng_trigger_status trigger_status; |
| 2060 | |
| 2061 | if (utils_parse_unsigned_long_long(fire_once_after_str, &threshold) != 0) { |
| 2062 | ERR("Failed to parse `%s` as an integer.", fire_once_after_str); |
| 2063 | goto error; |
| 2064 | } |
| 2065 | |
| 2066 | trigger_status = lttng_trigger_set_firing_policy(trigger, |
| 2067 | LTTNG_TRIGGER_FIRING_POLICY_ONCE_AFTER_N, |
| 2068 | threshold); |
| 2069 | if (trigger_status != LTTNG_TRIGGER_STATUS_OK) { |
| 2070 | ERR("Failed to set trigger's policy to `fire once after N`."); |
| 2071 | goto error; |
| 2072 | } |
| 2073 | } |
| 2074 | |
| 2075 | if (fire_every_str) { |
| 2076 | unsigned long long threshold; |
| 2077 | enum lttng_trigger_status trigger_status; |
| 2078 | |
| 2079 | if (utils_parse_unsigned_long_long(fire_every_str, &threshold) != 0) { |
| 2080 | ERR("Failed to parse `%s` as an integer.", fire_every_str); |
| 2081 | goto error; |
| 2082 | } |
| 2083 | |
| 2084 | trigger_status = lttng_trigger_set_firing_policy(trigger, |
| 2085 | LTTNG_TRIGGER_FIRING_POLICY_EVERY_N, threshold); |
| 2086 | if (trigger_status != LTTNG_TRIGGER_STATUS_OK) { |
| 2087 | ERR("Failed to set trigger's policy to `fire every N`."); |
| 2088 | goto error; |
| 2089 | } |
| 2090 | } |
| 2091 | |
| 2092 | if (user_id) { |
| 2093 | enum lttng_trigger_status trigger_status; |
| 2094 | char *end; |
| 2095 | long long uid; |
| 2096 | |
| 2097 | errno = 0; |
| 2098 | uid = strtol(user_id, &end, 10); |
| 2099 | if (end == user_id || *end != '\0' || errno != 0) { |
| 2100 | ERR("Failed to parse `%s` as a user id.", user_id); |
| 2101 | } |
| 2102 | |
| 2103 | trigger_status = lttng_trigger_set_owner_uid(trigger, uid); |
| 2104 | if (trigger_status != LTTNG_TRIGGER_STATUS_OK) { |
| 2105 | ERR("Failed to set trigger's user identity."); |
| 2106 | goto error; |
| 2107 | } |
| 2108 | } |
| 2109 | |
| 2110 | ret = lttng_register_trigger(trigger); |
| 2111 | if (ret) { |
| 2112 | ERR("Failed to register trigger: %s.", lttng_strerror(ret)); |
| 2113 | goto error; |
| 2114 | } |
| 2115 | |
| 2116 | MSG("Trigger registered successfully."); |
| 2117 | |
| 2118 | goto end; |
| 2119 | |
| 2120 | error: |
| 2121 | ret = 1; |
| 2122 | |
| 2123 | end: |
| 2124 | argpar_state_destroy(argpar_state); |
| 2125 | argpar_item_destroy(argpar_item); |
| 2126 | lttng_dynamic_pointer_array_reset(&actions); |
| 2127 | lttng_condition_destroy(condition); |
| 2128 | lttng_action_destroy(action_group); |
| 2129 | lttng_action_destroy(action); |
| 2130 | lttng_trigger_destroy(trigger); |
| 2131 | free(error); |
| 2132 | free(id); |
| 2133 | free(fire_once_after_str); |
| 2134 | free(fire_every_str); |
| 2135 | free(user_id); |
| 2136 | return ret; |
| 2137 | } |