| 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 "../command.hpp" |
| 9 | #include "../loglevel.hpp" |
| 10 | #include "../uprobe.hpp" |
| 11 | #include "common/argpar-utils/argpar-utils.hpp" |
| 12 | #include "common/argpar/argpar.h" |
| 13 | #include "common/dynamic-array.hpp" |
| 14 | #include "common/mi-lttng.hpp" |
| 15 | #include "common/string-utils/string-utils.hpp" |
| 16 | #include "common/utils.hpp" |
| 17 | |
| 18 | #include <lttng/domain-internal.hpp> |
| 19 | |
| 20 | #include <ctype.h> |
| 21 | #include <stdarg.h> |
| 22 | #include <stdio.h> |
| 23 | #include <string.h> |
| 24 | /* For lttng_event_rule_type_str(). */ |
| 25 | #include "common/dynamic-array.hpp" |
| 26 | #include "common/filter/filter-ast.hpp" |
| 27 | #include "common/filter/filter-ir.hpp" |
| 28 | |
| 29 | #include <lttng/event-rule/event-rule-internal.hpp> |
| 30 | #include <lttng/lttng.h> |
| 31 | |
| 32 | #if (LTTNG_SYMBOL_NAME_LEN == 256) |
| 33 | #define LTTNG_SYMBOL_NAME_LEN_SCANF_IS_A_BROKEN_API "255" |
| 34 | #endif |
| 35 | |
| 36 | #ifdef LTTNG_EMBED_HELP |
| 37 | static const char help_msg[] = |
| 38 | #include <lttng-add-trigger.1.h> |
| 39 | ; |
| 40 | #endif |
| 41 | |
| 42 | enum { |
| 43 | OPT_HELP, |
| 44 | OPT_LIST_OPTIONS, |
| 45 | |
| 46 | OPT_CONDITION, |
| 47 | OPT_ACTION, |
| 48 | OPT_ID, |
| 49 | OPT_OWNER_UID, |
| 50 | OPT_RATE_POLICY, |
| 51 | |
| 52 | OPT_NAME, |
| 53 | OPT_FILTER, |
| 54 | OPT_EXCLUDE_NAME, |
| 55 | OPT_EVENT_NAME, |
| 56 | OPT_LOG_LEVEL, |
| 57 | |
| 58 | OPT_TYPE, |
| 59 | OPT_LOCATION, |
| 60 | |
| 61 | OPT_MAX_SIZE, |
| 62 | OPT_DATA_URL, |
| 63 | OPT_CTRL_URL, |
| 64 | OPT_URL, |
| 65 | OPT_PATH, |
| 66 | |
| 67 | OPT_CAPTURE, |
| 68 | }; |
| 69 | |
| 70 | static const struct argpar_opt_descr event_rule_opt_descrs[] = { |
| 71 | { OPT_FILTER, 'f', "filter", true }, |
| 72 | { OPT_NAME, 'n', "name", true }, |
| 73 | { OPT_EXCLUDE_NAME, 'x', "exclude-name", true }, |
| 74 | { OPT_LOG_LEVEL, 'l', "log-level", true }, |
| 75 | { OPT_EVENT_NAME, 'E', "event-name", true }, |
| 76 | |
| 77 | { OPT_TYPE, 't', "type", true }, |
| 78 | { OPT_LOCATION, 'L', "location", true }, |
| 79 | |
| 80 | /* Capture descriptor */ |
| 81 | { OPT_CAPTURE, '\0', "capture", true }, |
| 82 | |
| 83 | ARGPAR_OPT_DESCR_SENTINEL |
| 84 | }; |
| 85 | |
| 86 | static bool has_syscall_prefix(const char *arg) |
| 87 | { |
| 88 | bool matches = false; |
| 89 | const char kernel_syscall_type_opt_prefix[] = "kernel:syscall"; |
| 90 | const size_t kernel_syscall_type_opt_prefix_len = |
| 91 | sizeof(kernel_syscall_type_opt_prefix) - 1; |
| 92 | const char syscall_type_opt_prefix[] = "syscall"; |
| 93 | const size_t syscall_type_opt_prefix_len = sizeof(syscall_type_opt_prefix) - 1; |
| 94 | |
| 95 | if (strncmp(arg, syscall_type_opt_prefix, syscall_type_opt_prefix_len) == 0) { |
| 96 | matches = true; |
| 97 | } else if (strncmp(arg, |
| 98 | kernel_syscall_type_opt_prefix, |
| 99 | kernel_syscall_type_opt_prefix_len) == 0) { |
| 100 | matches = true; |
| 101 | } else { |
| 102 | matches = false; |
| 103 | } |
| 104 | |
| 105 | return matches; |
| 106 | } |
| 107 | |
| 108 | static bool assign_event_rule_type(enum lttng_event_rule_type *dest, const char *arg) |
| 109 | { |
| 110 | bool ret; |
| 111 | |
| 112 | if (*dest != LTTNG_EVENT_RULE_TYPE_UNKNOWN) { |
| 113 | ERR("More than one `--type` was specified."); |
| 114 | goto error; |
| 115 | } |
| 116 | |
| 117 | if (strcmp(arg, "user") == 0 || strcmp(arg, "user:tracepoint") == 0) { |
| 118 | *dest = LTTNG_EVENT_RULE_TYPE_USER_TRACEPOINT; |
| 119 | } else if (strcmp(arg, "kernel") == 0 || strcmp(arg, "kernel:tracepoint") == 0) { |
| 120 | *dest = LTTNG_EVENT_RULE_TYPE_KERNEL_TRACEPOINT; |
| 121 | } else if (strcmp(arg, "jul") == 0 || strcmp(arg, "jul:logging") == 0) { |
| 122 | *dest = LTTNG_EVENT_RULE_TYPE_JUL_LOGGING; |
| 123 | } else if (strcmp(arg, "log4j") == 0 || strcmp(arg, "log4j:logging") == 0) { |
| 124 | *dest = LTTNG_EVENT_RULE_TYPE_LOG4J_LOGGING; |
| 125 | } else if (strcmp(arg, "python") == 0 || strcmp(arg, "python:logging") == 0) { |
| 126 | *dest = LTTNG_EVENT_RULE_TYPE_PYTHON_LOGGING; |
| 127 | } else if (strcmp(arg, "kprobe") == 0 || strcmp(arg, "kernel:kprobe") == 0) { |
| 128 | *dest = LTTNG_EVENT_RULE_TYPE_KERNEL_KPROBE; |
| 129 | } else if (strcmp(arg, "kernel:uprobe") == 0) { |
| 130 | *dest = LTTNG_EVENT_RULE_TYPE_KERNEL_UPROBE; |
| 131 | } else if (has_syscall_prefix(arg)) { |
| 132 | /* |
| 133 | * Matches the following: |
| 134 | * - syscall |
| 135 | * - syscall:entry |
| 136 | * - syscall:exit |
| 137 | * - syscall:entry+exit |
| 138 | * - syscall:* |
| 139 | * - kernel:syscall |
| 140 | * - kernel:syscall:entry |
| 141 | * - kernel:syscall:exit |
| 142 | * - kernel:syscall:entry+exit |
| 143 | * - kernel:syscall:* |
| 144 | * |
| 145 | * Validation for the right side is left to further usage sites. |
| 146 | */ |
| 147 | *dest = LTTNG_EVENT_RULE_TYPE_KERNEL_SYSCALL; |
| 148 | } else { |
| 149 | ERR("Invalid `--type` value: %s", arg); |
| 150 | goto error; |
| 151 | } |
| 152 | |
| 153 | ret = true; |
| 154 | goto end; |
| 155 | |
| 156 | error: |
| 157 | ret = false; |
| 158 | |
| 159 | end: |
| 160 | return ret; |
| 161 | } |
| 162 | |
| 163 | static bool assign_string(char **dest, const char *src, const char *opt_name) |
| 164 | { |
| 165 | bool ret; |
| 166 | |
| 167 | if (*dest) { |
| 168 | ERR("Duplicate '%s' given.", opt_name); |
| 169 | goto error; |
| 170 | } |
| 171 | |
| 172 | *dest = strdup(src); |
| 173 | if (!*dest) { |
| 174 | PERROR("Failed to allocate string '%s'.", opt_name); |
| 175 | goto error; |
| 176 | } |
| 177 | |
| 178 | ret = true; |
| 179 | goto end; |
| 180 | |
| 181 | error: |
| 182 | ret = false; |
| 183 | |
| 184 | end: |
| 185 | return ret; |
| 186 | } |
| 187 | |
| 188 | static bool |
| 189 | parse_syscall_emission_site_from_type(const char *str, |
| 190 | enum lttng_event_rule_kernel_syscall_emission_site *type) |
| 191 | { |
| 192 | bool ret = false; |
| 193 | const char kernel_prefix[] = "kernel:"; |
| 194 | const size_t kernel_prefix_len = sizeof(kernel_prefix) - 1; |
| 195 | |
| 196 | /* |
| 197 | * If the passed string is of the form "kernel:syscall*", move the |
| 198 | * pointer passed "kernel:". |
| 199 | */ |
| 200 | if (strncmp(str, kernel_prefix, kernel_prefix_len) == 0) { |
| 201 | str = &str[kernel_prefix_len]; |
| 202 | } |
| 203 | |
| 204 | if (strcmp(str, "syscall") == 0 || strcmp(str, "syscall:entry+exit") == 0) { |
| 205 | *type = LTTNG_EVENT_RULE_KERNEL_SYSCALL_EMISSION_SITE_ENTRY_EXIT; |
| 206 | } else if (strcmp(str, "syscall:entry") == 0) { |
| 207 | *type = LTTNG_EVENT_RULE_KERNEL_SYSCALL_EMISSION_SITE_ENTRY; |
| 208 | } else if (strcmp(str, "syscall:exit") == 0) { |
| 209 | *type = LTTNG_EVENT_RULE_KERNEL_SYSCALL_EMISSION_SITE_EXIT; |
| 210 | } else { |
| 211 | goto error; |
| 212 | } |
| 213 | |
| 214 | ret = true; |
| 215 | |
| 216 | error: |
| 217 | return ret; |
| 218 | } |
| 219 | |
| 220 | /* |
| 221 | * Parse `str` as a log level against the passed event rule type. |
| 222 | * |
| 223 | * Return the log level in `*log_level`. Return true in `*log_level_only` if |
| 224 | * the string specifies exactly this log level, false if it specifies at least |
| 225 | * this log level. |
| 226 | * |
| 227 | * Return true if the string was successfully parsed as a log level string. |
| 228 | */ |
| 229 | static bool parse_log_level_string(const char *str, |
| 230 | enum lttng_event_rule_type event_rule_type, |
| 231 | int *log_level, |
| 232 | bool *log_level_only) |
| 233 | { |
| 234 | bool ret; |
| 235 | |
| 236 | switch (event_rule_type) { |
| 237 | case LTTNG_EVENT_RULE_TYPE_USER_TRACEPOINT: |
| 238 | { |
| 239 | enum lttng_loglevel log_level_min, log_level_max; |
| 240 | if (!loglevel_parse_range_string(str, &log_level_min, &log_level_max)) { |
| 241 | goto error; |
| 242 | } |
| 243 | |
| 244 | /* Only support VAL and VAL.. for now. */ |
| 245 | if (log_level_min != log_level_max && log_level_max != LTTNG_LOGLEVEL_EMERG) { |
| 246 | goto error; |
| 247 | } |
| 248 | |
| 249 | *log_level = (int) log_level_min; |
| 250 | *log_level_only = log_level_min == log_level_max; |
| 251 | break; |
| 252 | } |
| 253 | case LTTNG_EVENT_RULE_TYPE_LOG4J_LOGGING: |
| 254 | { |
| 255 | enum lttng_loglevel_log4j log_level_min, log_level_max; |
| 256 | if (!loglevel_log4j_parse_range_string(str, &log_level_min, &log_level_max)) { |
| 257 | goto error; |
| 258 | } |
| 259 | |
| 260 | /* Only support VAL and VAL.. for now. */ |
| 261 | if (log_level_min != log_level_max && log_level_max != LTTNG_LOGLEVEL_LOG4J_FATAL) { |
| 262 | goto error; |
| 263 | } |
| 264 | |
| 265 | *log_level = (int) log_level_min; |
| 266 | *log_level_only = log_level_min == log_level_max; |
| 267 | break; |
| 268 | } |
| 269 | case LTTNG_EVENT_RULE_TYPE_JUL_LOGGING: |
| 270 | { |
| 271 | enum lttng_loglevel_jul log_level_min, log_level_max; |
| 272 | if (!loglevel_jul_parse_range_string(str, &log_level_min, &log_level_max)) { |
| 273 | goto error; |
| 274 | } |
| 275 | |
| 276 | /* Only support VAL and VAL.. for now. */ |
| 277 | if (log_level_min != log_level_max && log_level_max != LTTNG_LOGLEVEL_JUL_SEVERE) { |
| 278 | goto error; |
| 279 | } |
| 280 | |
| 281 | *log_level = (int) log_level_min; |
| 282 | *log_level_only = log_level_min == log_level_max; |
| 283 | break; |
| 284 | } |
| 285 | case LTTNG_EVENT_RULE_TYPE_PYTHON_LOGGING: |
| 286 | { |
| 287 | enum lttng_loglevel_python log_level_min, log_level_max; |
| 288 | if (!loglevel_python_parse_range_string(str, &log_level_min, &log_level_max)) { |
| 289 | goto error; |
| 290 | } |
| 291 | |
| 292 | /* Only support VAL and VAL.. for now. */ |
| 293 | if (log_level_min != log_level_max && |
| 294 | log_level_max != LTTNG_LOGLEVEL_PYTHON_CRITICAL) { |
| 295 | goto error; |
| 296 | } |
| 297 | |
| 298 | *log_level = (int) log_level_min; |
| 299 | *log_level_only = log_level_min == log_level_max; |
| 300 | break; |
| 301 | } |
| 302 | default: |
| 303 | /* Invalid domain type. */ |
| 304 | abort(); |
| 305 | } |
| 306 | |
| 307 | ret = true; |
| 308 | goto end; |
| 309 | |
| 310 | error: |
| 311 | ret = false; |
| 312 | |
| 313 | end: |
| 314 | return ret; |
| 315 | } |
| 316 | |
| 317 | static int parse_kernel_probe_opts(const char *source, |
| 318 | struct lttng_kernel_probe_location **location) |
| 319 | { |
| 320 | int ret = 0; |
| 321 | int match; |
| 322 | char s_hex[19]; |
| 323 | char name[LTTNG_SYMBOL_NAME_LEN]; |
| 324 | char *symbol_name = nullptr; |
| 325 | uint64_t offset; |
| 326 | |
| 327 | /* Check for symbol+offset. */ |
| 328 | match = sscanf( |
| 329 | source, "%" LTTNG_SYMBOL_NAME_LEN_SCANF_IS_A_BROKEN_API "[^'+']+%18s", name, s_hex); |
| 330 | if (match == 2) { |
| 331 | if (*s_hex == '\0') { |
| 332 | ERR("Kernel probe symbol offset is missing."); |
| 333 | goto error; |
| 334 | } |
| 335 | |
| 336 | symbol_name = strndup(name, LTTNG_SYMBOL_NAME_LEN); |
| 337 | if (!symbol_name) { |
| 338 | PERROR("Failed to copy kernel probe location symbol name."); |
| 339 | goto error; |
| 340 | } |
| 341 | offset = strtoull(s_hex, nullptr, 0); |
| 342 | |
| 343 | *location = lttng_kernel_probe_location_symbol_create(symbol_name, offset); |
| 344 | if (!*location) { |
| 345 | ERR("Failed to create symbol kernel probe location."); |
| 346 | goto error; |
| 347 | } |
| 348 | |
| 349 | goto end; |
| 350 | } |
| 351 | |
| 352 | /* Check for symbol. */ |
| 353 | if (isalpha(name[0]) || name[0] == '_') { |
| 354 | match = sscanf(source, "%" LTTNG_SYMBOL_NAME_LEN_SCANF_IS_A_BROKEN_API "s", name); |
| 355 | if (match == 1) { |
| 356 | symbol_name = strndup(name, LTTNG_SYMBOL_NAME_LEN); |
| 357 | if (!symbol_name) { |
| 358 | ERR("Failed to copy kernel probe location symbol name."); |
| 359 | goto error; |
| 360 | } |
| 361 | |
| 362 | *location = lttng_kernel_probe_location_symbol_create(symbol_name, 0); |
| 363 | if (!*location) { |
| 364 | ERR("Failed to create symbol kernel probe location."); |
| 365 | goto error; |
| 366 | } |
| 367 | |
| 368 | goto end; |
| 369 | } |
| 370 | } |
| 371 | |
| 372 | /* Check for address. */ |
| 373 | match = sscanf(source, "%18s", s_hex); |
| 374 | if (match > 0) { |
| 375 | uint64_t address; |
| 376 | |
| 377 | if (*s_hex == '\0') { |
| 378 | ERR("Invalid kernel probe location address."); |
| 379 | goto error; |
| 380 | } |
| 381 | |
| 382 | address = strtoull(s_hex, nullptr, 0); |
| 383 | *location = lttng_kernel_probe_location_address_create(address); |
| 384 | if (!*location) { |
| 385 | ERR("Failed to create symbol kernel probe location."); |
| 386 | goto error; |
| 387 | } |
| 388 | |
| 389 | goto end; |
| 390 | } |
| 391 | |
| 392 | error: |
| 393 | /* No match */ |
| 394 | ret = -1; |
| 395 | *location = nullptr; |
| 396 | |
| 397 | end: |
| 398 | free(symbol_name); |
| 399 | return ret; |
| 400 | } |
| 401 | |
| 402 | static struct lttng_event_expr * |
| 403 | ir_op_load_expr_to_event_expr(const struct ir_load_expression *load_expr, const char *capture_str) |
| 404 | { |
| 405 | char *provider_name = nullptr; |
| 406 | struct lttng_event_expr *event_expr = nullptr; |
| 407 | const struct ir_load_expression_op *load_expr_op = load_expr->child; |
| 408 | const enum ir_load_expression_type load_expr_child_type = load_expr_op->type; |
| 409 | |
| 410 | switch (load_expr_child_type) { |
| 411 | case IR_LOAD_EXPRESSION_GET_PAYLOAD_ROOT: |
| 412 | case IR_LOAD_EXPRESSION_GET_CONTEXT_ROOT: |
| 413 | { |
| 414 | const char *field_name; |
| 415 | |
| 416 | load_expr_op = load_expr_op->next; |
| 417 | LTTNG_ASSERT(load_expr_op); |
| 418 | LTTNG_ASSERT(load_expr_op->type == IR_LOAD_EXPRESSION_GET_SYMBOL); |
| 419 | field_name = load_expr_op->u.symbol; |
| 420 | LTTNG_ASSERT(field_name); |
| 421 | |
| 422 | event_expr = load_expr_child_type == IR_LOAD_EXPRESSION_GET_PAYLOAD_ROOT ? |
| 423 | lttng_event_expr_event_payload_field_create(field_name) : |
| 424 | lttng_event_expr_channel_context_field_create(field_name); |
| 425 | if (!event_expr) { |
| 426 | ERR("Failed to create %s event expression: field name = `%s`.", |
| 427 | load_expr_child_type == IR_LOAD_EXPRESSION_GET_PAYLOAD_ROOT ? |
| 428 | "payload field" : |
| 429 | "channel context", |
| 430 | field_name); |
| 431 | goto error; |
| 432 | } |
| 433 | |
| 434 | break; |
| 435 | } |
| 436 | case IR_LOAD_EXPRESSION_GET_APP_CONTEXT_ROOT: |
| 437 | { |
| 438 | const char *colon; |
| 439 | const char *type_name; |
| 440 | const char *field_name; |
| 441 | |
| 442 | load_expr_op = load_expr_op->next; |
| 443 | LTTNG_ASSERT(load_expr_op); |
| 444 | LTTNG_ASSERT(load_expr_op->type == IR_LOAD_EXPRESSION_GET_SYMBOL); |
| 445 | field_name = load_expr_op->u.symbol; |
| 446 | LTTNG_ASSERT(field_name); |
| 447 | |
| 448 | /* |
| 449 | * The field name needs to be of the form PROVIDER:TYPE. We |
| 450 | * split it here. |
| 451 | */ |
| 452 | colon = strchr(field_name, ':'); |
| 453 | if (!colon) { |
| 454 | ERR("Invalid app-specific context field name: missing colon in `%s`.", |
| 455 | field_name); |
| 456 | goto error; |
| 457 | } |
| 458 | |
| 459 | type_name = colon + 1; |
| 460 | if (*type_name == '\0') { |
| 461 | ERR("Invalid app-specific context field name: missing type name after colon in `%s`.", |
| 462 | field_name); |
| 463 | goto error; |
| 464 | } |
| 465 | |
| 466 | provider_name = strndup(field_name, colon - field_name); |
| 467 | if (!provider_name) { |
| 468 | PERROR("Failed to allocate field name string"); |
| 469 | goto error; |
| 470 | } |
| 471 | |
| 472 | event_expr = lttng_event_expr_app_specific_context_field_create(provider_name, |
| 473 | type_name); |
| 474 | if (!event_expr) { |
| 475 | ERR("Failed to create app-specific context field event expression: provider name = `%s`, type name = `%s`", |
| 476 | provider_name, |
| 477 | type_name); |
| 478 | goto error; |
| 479 | } |
| 480 | |
| 481 | break; |
| 482 | } |
| 483 | default: |
| 484 | ERR("%s: unexpected load expr type %d.", __func__, load_expr_op->type); |
| 485 | abort(); |
| 486 | } |
| 487 | |
| 488 | load_expr_op = load_expr_op->next; |
| 489 | |
| 490 | /* There may be a single array index after that. */ |
| 491 | if (load_expr_op->type == IR_LOAD_EXPRESSION_GET_INDEX) { |
| 492 | struct lttng_event_expr *index_event_expr; |
| 493 | const uint64_t index = load_expr_op->u.index; |
| 494 | |
| 495 | index_event_expr = lttng_event_expr_array_field_element_create(event_expr, index); |
| 496 | if (!index_event_expr) { |
| 497 | ERR("Failed to create array field element event expression."); |
| 498 | goto error; |
| 499 | } |
| 500 | |
| 501 | event_expr = index_event_expr; |
| 502 | load_expr_op = load_expr_op->next; |
| 503 | } |
| 504 | |
| 505 | switch (load_expr_op->type) { |
| 506 | case IR_LOAD_EXPRESSION_LOAD_FIELD: |
| 507 | /* |
| 508 | * This is what we expect, IR_LOAD_EXPRESSION_LOAD_FIELD is |
| 509 | * always found at the end of the chain. |
| 510 | */ |
| 511 | break; |
| 512 | case IR_LOAD_EXPRESSION_GET_SYMBOL: |
| 513 | ERR("While parsing expression `%s`: Capturing subfields is not supported.", |
| 514 | capture_str); |
| 515 | goto error; |
| 516 | |
| 517 | default: |
| 518 | ERR("%s: unexpected load expression operator %s.", |
| 519 | __func__, |
| 520 | ir_load_expression_type_str(load_expr_op->type)); |
| 521 | abort(); |
| 522 | } |
| 523 | |
| 524 | goto end; |
| 525 | |
| 526 | error: |
| 527 | lttng_event_expr_destroy(event_expr); |
| 528 | event_expr = nullptr; |
| 529 | |
| 530 | end: |
| 531 | free(provider_name); |
| 532 | |
| 533 | return event_expr; |
| 534 | } |
| 535 | |
| 536 | static struct lttng_event_expr *ir_op_load_to_event_expr(const struct ir_op *ir, |
| 537 | const char *capture_str) |
| 538 | { |
| 539 | struct lttng_event_expr *event_expr = nullptr; |
| 540 | |
| 541 | LTTNG_ASSERT(ir->op == IR_OP_LOAD); |
| 542 | |
| 543 | switch (ir->data_type) { |
| 544 | case IR_DATA_EXPRESSION: |
| 545 | { |
| 546 | const struct ir_load_expression *ir_load_expr = ir->u.load.u.expression; |
| 547 | |
| 548 | event_expr = ir_op_load_expr_to_event_expr(ir_load_expr, capture_str); |
| 549 | break; |
| 550 | } |
| 551 | default: |
| 552 | ERR("%s: unexpected data type: %s.", __func__, ir_data_type_str(ir->data_type)); |
| 553 | abort(); |
| 554 | } |
| 555 | |
| 556 | return event_expr; |
| 557 | } |
| 558 | |
| 559 | static const char *ir_operator_type_human_str(enum ir_op_type op) |
| 560 | { |
| 561 | const char *name; |
| 562 | |
| 563 | switch (op) { |
| 564 | case IR_OP_BINARY: |
| 565 | name = "Binary"; |
| 566 | break; |
| 567 | case IR_OP_UNARY: |
| 568 | name = "Unary"; |
| 569 | break; |
| 570 | case IR_OP_LOGICAL: |
| 571 | name = "Logical"; |
| 572 | break; |
| 573 | default: |
| 574 | abort(); |
| 575 | } |
| 576 | |
| 577 | return name; |
| 578 | } |
| 579 | |
| 580 | static struct lttng_event_expr *ir_op_root_to_event_expr(const struct ir_op *ir, |
| 581 | const char *capture_str) |
| 582 | { |
| 583 | struct lttng_event_expr *event_expr = nullptr; |
| 584 | |
| 585 | LTTNG_ASSERT(ir->op == IR_OP_ROOT); |
| 586 | ir = ir->u.root.child; |
| 587 | |
| 588 | switch (ir->op) { |
| 589 | case IR_OP_LOAD: |
| 590 | event_expr = ir_op_load_to_event_expr(ir, capture_str); |
| 591 | break; |
| 592 | case IR_OP_BINARY: |
| 593 | case IR_OP_UNARY: |
| 594 | case IR_OP_LOGICAL: |
| 595 | ERR("While parsing expression `%s`: %s operators are not allowed in capture expressions.", |
| 596 | capture_str, |
| 597 | ir_operator_type_human_str(ir->op)); |
| 598 | break; |
| 599 | default: |
| 600 | ERR("%s: unexpected IR op type: %s.", __func__, ir_op_type_str(ir->op)); |
| 601 | abort(); |
| 602 | } |
| 603 | |
| 604 | return event_expr; |
| 605 | } |
| 606 | |
| 607 | static void destroy_event_expr(void *ptr) |
| 608 | { |
| 609 | lttng_event_expr_destroy((lttng_event_expr *) ptr); |
| 610 | } |
| 611 | |
| 612 | namespace { |
| 613 | struct parse_event_rule_res { |
| 614 | /* Owned by this. */ |
| 615 | struct lttng_event_rule *er; |
| 616 | |
| 617 | /* Array of `struct lttng_event_expr *` */ |
| 618 | struct lttng_dynamic_pointer_array capture_descriptors; |
| 619 | }; |
| 620 | } /* namespace */ |
| 621 | |
| 622 | static struct parse_event_rule_res parse_event_rule(int *argc, const char ***argv, int argc_offset) |
| 623 | { |
| 624 | enum lttng_event_rule_type event_rule_type = LTTNG_EVENT_RULE_TYPE_UNKNOWN; |
| 625 | struct argpar_iter *argpar_iter = nullptr; |
| 626 | const struct argpar_item *argpar_item = nullptr; |
| 627 | int consumed_args = -1; |
| 628 | struct lttng_kernel_probe_location *kernel_probe_location = nullptr; |
| 629 | struct lttng_userspace_probe_location *userspace_probe_location = nullptr; |
| 630 | struct parse_event_rule_res res = {}; |
| 631 | struct lttng_event_expr *event_expr = nullptr; |
| 632 | struct filter_parser_ctx *parser_ctx = nullptr; |
| 633 | struct lttng_log_level_rule *log_level_rule = nullptr; |
| 634 | |
| 635 | /* Event rule type option */ |
| 636 | char *event_rule_type_str = nullptr; |
| 637 | |
| 638 | /* Tracepoint and syscall options. */ |
| 639 | char *name = nullptr; |
| 640 | /* Array of strings. */ |
| 641 | struct lttng_dynamic_pointer_array exclude_names; |
| 642 | |
| 643 | /* For userspace / kernel probe and function. */ |
| 644 | char *location = nullptr; |
| 645 | char *event_name = nullptr; |
| 646 | |
| 647 | /* Filter. */ |
| 648 | char *filter = nullptr; |
| 649 | |
| 650 | /* Log level. */ |
| 651 | char *log_level_str = nullptr; |
| 652 | |
| 653 | lttng_dynamic_pointer_array_init(&res.capture_descriptors, destroy_event_expr); |
| 654 | |
| 655 | lttng_dynamic_pointer_array_init(&exclude_names, free); |
| 656 | |
| 657 | argpar_iter = argpar_iter_create(*argc, *argv, event_rule_opt_descrs); |
| 658 | if (!argpar_iter) { |
| 659 | ERR("Failed to allocate an argpar iter."); |
| 660 | goto error; |
| 661 | } |
| 662 | |
| 663 | while (true) { |
| 664 | enum parse_next_item_status status; |
| 665 | |
| 666 | status = parse_next_item( |
| 667 | argpar_iter, &argpar_item, argc_offset, *argv, false, nullptr, nullptr); |
| 668 | if (status == PARSE_NEXT_ITEM_STATUS_ERROR || |
| 669 | status == PARSE_NEXT_ITEM_STATUS_ERROR_MEMORY) { |
| 670 | goto error; |
| 671 | } else if (status == PARSE_NEXT_ITEM_STATUS_END) { |
| 672 | break; |
| 673 | } |
| 674 | |
| 675 | LTTNG_ASSERT(status == PARSE_NEXT_ITEM_STATUS_OK); |
| 676 | |
| 677 | if (argpar_item_type(argpar_item) == ARGPAR_ITEM_TYPE_OPT) { |
| 678 | const struct argpar_opt_descr *descr = argpar_item_opt_descr(argpar_item); |
| 679 | const char *arg = argpar_item_opt_arg(argpar_item); |
| 680 | |
| 681 | switch (descr->id) { |
| 682 | case OPT_TYPE: |
| 683 | if (!assign_event_rule_type(&event_rule_type, arg)) { |
| 684 | goto error; |
| 685 | } |
| 686 | |
| 687 | /* Save the string for later use. */ |
| 688 | if (!assign_string(&event_rule_type_str, arg, "--type/-t")) { |
| 689 | goto error; |
| 690 | } |
| 691 | |
| 692 | break; |
| 693 | case OPT_LOCATION: |
| 694 | if (!assign_string(&location, arg, "--location/-L")) { |
| 695 | goto error; |
| 696 | } |
| 697 | |
| 698 | break; |
| 699 | case OPT_EVENT_NAME: |
| 700 | if (!assign_string(&event_name, arg, "--event-name/-E")) { |
| 701 | goto error; |
| 702 | } |
| 703 | |
| 704 | break; |
| 705 | case OPT_FILTER: |
| 706 | if (!assign_string(&filter, arg, "--filter/-f")) { |
| 707 | goto error; |
| 708 | } |
| 709 | |
| 710 | break; |
| 711 | case OPT_NAME: |
| 712 | if (!assign_string(&name, arg, "--name/-n")) { |
| 713 | goto error; |
| 714 | } |
| 715 | |
| 716 | break; |
| 717 | case OPT_EXCLUDE_NAME: |
| 718 | { |
| 719 | int ret; |
| 720 | |
| 721 | ret = lttng_dynamic_pointer_array_add_pointer(&exclude_names, |
| 722 | strdup(arg)); |
| 723 | if (ret != 0) { |
| 724 | ERR("Failed to add pointer to dynamic pointer array."); |
| 725 | goto error; |
| 726 | } |
| 727 | |
| 728 | break; |
| 729 | } |
| 730 | case OPT_LOG_LEVEL: |
| 731 | if (!assign_string(&log_level_str, arg, "--log-level/-l")) { |
| 732 | goto error; |
| 733 | } |
| 734 | |
| 735 | break; |
| 736 | case OPT_CAPTURE: |
| 737 | { |
| 738 | int ret; |
| 739 | |
| 740 | ret = filter_parser_ctx_create_from_filter_expression(arg, |
| 741 | &parser_ctx); |
| 742 | if (ret) { |
| 743 | ERR("Failed to parse capture expression `%s`.", arg); |
| 744 | goto error; |
| 745 | } |
| 746 | |
| 747 | event_expr = ir_op_root_to_event_expr(parser_ctx->ir_root, arg); |
| 748 | filter_parser_ctx_free(parser_ctx); |
| 749 | parser_ctx = nullptr; |
| 750 | if (!event_expr) { |
| 751 | /* |
| 752 | * ir_op_root_to_event_expr has printed |
| 753 | * an error message. |
| 754 | */ |
| 755 | goto error; |
| 756 | } |
| 757 | |
| 758 | ret = lttng_dynamic_pointer_array_add_pointer( |
| 759 | &res.capture_descriptors, event_expr); |
| 760 | if (ret) { |
| 761 | goto error; |
| 762 | } |
| 763 | |
| 764 | /* |
| 765 | * The ownership of event expression was |
| 766 | * transferred to the dynamic array. |
| 767 | */ |
| 768 | event_expr = nullptr; |
| 769 | |
| 770 | break; |
| 771 | } |
| 772 | default: |
| 773 | abort(); |
| 774 | } |
| 775 | } else { |
| 776 | const char *arg = argpar_item_non_opt_arg(argpar_item); |
| 777 | |
| 778 | /* Don't accept non-option arguments. */ |
| 779 | ERR("Unexpected argument '%s'", arg); |
| 780 | goto error; |
| 781 | } |
| 782 | } |
| 783 | |
| 784 | if (event_rule_type == LTTNG_EVENT_RULE_TYPE_UNKNOWN) { |
| 785 | ERR("Event rule requires a --type."); |
| 786 | goto error; |
| 787 | } |
| 788 | |
| 789 | /* |
| 790 | * Option --name is applicable to event rules of type kernel, user, jul, |
| 791 | * log4j,python and syscall. If --name is omitted, it is implicitly |
| 792 | * "*". |
| 793 | */ |
| 794 | switch (event_rule_type) { |
| 795 | case LTTNG_EVENT_RULE_TYPE_USER_TRACEPOINT: |
| 796 | case LTTNG_EVENT_RULE_TYPE_KERNEL_TRACEPOINT: |
| 797 | case LTTNG_EVENT_RULE_TYPE_JUL_LOGGING: |
| 798 | case LTTNG_EVENT_RULE_TYPE_LOG4J_LOGGING: |
| 799 | case LTTNG_EVENT_RULE_TYPE_PYTHON_LOGGING: |
| 800 | case LTTNG_EVENT_RULE_TYPE_KERNEL_SYSCALL: |
| 801 | if (!name) { |
| 802 | name = strdup("*"); |
| 803 | } |
| 804 | break; |
| 805 | |
| 806 | default: |
| 807 | if (name) { |
| 808 | ERR("Can't use --name with %s event rules.", |
| 809 | lttng_event_rule_type_str(event_rule_type)); |
| 810 | goto error; |
| 811 | } |
| 812 | |
| 813 | if (lttng_dynamic_pointer_array_get_count(&exclude_names) > 0) { |
| 814 | ERR("Can't use --exclude-name/-x with %s event rules.", |
| 815 | lttng_event_rule_type_str(event_rule_type)); |
| 816 | goto error; |
| 817 | } |
| 818 | } |
| 819 | |
| 820 | /* |
| 821 | * Option --location is only applicable to (and mandatory for) event |
| 822 | * rules of type {k,u}probe and function. |
| 823 | * |
| 824 | * Option --event-name is only applicable to event rules of type probe. |
| 825 | * If omitted, it defaults to the location. |
| 826 | */ |
| 827 | switch (event_rule_type) { |
| 828 | case LTTNG_EVENT_RULE_TYPE_KERNEL_KPROBE: |
| 829 | case LTTNG_EVENT_RULE_TYPE_KERNEL_UPROBE: |
| 830 | if (!location) { |
| 831 | ERR("Event rule of type %s requires a --location.", |
| 832 | lttng_event_rule_type_str(event_rule_type)); |
| 833 | goto error; |
| 834 | } |
| 835 | |
| 836 | if (!event_name) { |
| 837 | event_name = strdup(location); |
| 838 | } |
| 839 | |
| 840 | break; |
| 841 | |
| 842 | default: |
| 843 | if (location) { |
| 844 | ERR("Can't use --location with %s event rules.", |
| 845 | lttng_event_rule_type_str(event_rule_type)); |
| 846 | goto error; |
| 847 | } |
| 848 | |
| 849 | if (event_name) { |
| 850 | ERR("Can't use --event-name with %s event rules.", |
| 851 | lttng_event_rule_type_str(event_rule_type)); |
| 852 | goto error; |
| 853 | } |
| 854 | } |
| 855 | |
| 856 | /* |
| 857 | * Update *argc and *argv so our caller can keep parsing what follows. |
| 858 | */ |
| 859 | consumed_args = argpar_iter_ingested_orig_args(argpar_iter); |
| 860 | LTTNG_ASSERT(consumed_args >= 0); |
| 861 | *argc -= consumed_args; |
| 862 | *argv += consumed_args; |
| 863 | |
| 864 | /* |
| 865 | * Adding a filter to a probe, function or userspace-probe would be |
| 866 | * denied by the kernel tracer as it's not supported at the moment. We |
| 867 | * do an early check here to warn the user. |
| 868 | */ |
| 869 | if (filter) { |
| 870 | switch (event_rule_type) { |
| 871 | case LTTNG_EVENT_RULE_TYPE_USER_TRACEPOINT: |
| 872 | case LTTNG_EVENT_RULE_TYPE_KERNEL_TRACEPOINT: |
| 873 | case LTTNG_EVENT_RULE_TYPE_JUL_LOGGING: |
| 874 | case LTTNG_EVENT_RULE_TYPE_LOG4J_LOGGING: |
| 875 | case LTTNG_EVENT_RULE_TYPE_PYTHON_LOGGING: |
| 876 | case LTTNG_EVENT_RULE_TYPE_KERNEL_SYSCALL: |
| 877 | break; |
| 878 | default: |
| 879 | ERR("Filter expressions are not supported for %s event rules.", |
| 880 | lttng_event_rule_type_str(event_rule_type)); |
| 881 | goto error; |
| 882 | } |
| 883 | } |
| 884 | |
| 885 | /* |
| 886 | * If --exclude-name/-x was passed, split it into an exclusion list. |
| 887 | * Exclusions are only supported by |
| 888 | * LTTNG_EVENT_RULE_TYPE_USER_TRACEPOINT for now. |
| 889 | */ |
| 890 | if (lttng_dynamic_pointer_array_get_count(&exclude_names) > 0) { |
| 891 | if (event_rule_type != LTTNG_EVENT_RULE_TYPE_USER_TRACEPOINT) { |
| 892 | ERR("Event name exclusions are not yet implemented for %s event rules.", |
| 893 | lttng_event_rule_type_str(event_rule_type)); |
| 894 | goto error; |
| 895 | } |
| 896 | |
| 897 | if (validate_exclusion_list(name, &exclude_names) != 0) { |
| 898 | /* |
| 899 | * Assume validate_exclusion_list already prints an |
| 900 | * error message. |
| 901 | */ |
| 902 | goto error; |
| 903 | } |
| 904 | } |
| 905 | |
| 906 | if (log_level_str) { |
| 907 | switch (event_rule_type) { |
| 908 | case LTTNG_EVENT_RULE_TYPE_USER_TRACEPOINT: |
| 909 | case LTTNG_EVENT_RULE_TYPE_JUL_LOGGING: |
| 910 | case LTTNG_EVENT_RULE_TYPE_LOG4J_LOGGING: |
| 911 | case LTTNG_EVENT_RULE_TYPE_PYTHON_LOGGING: |
| 912 | { |
| 913 | int log_level; |
| 914 | bool log_level_only; |
| 915 | |
| 916 | if (strcmp(log_level_str, "..") == 0) { |
| 917 | /* |
| 918 | * ".." is the same as passing no log level |
| 919 | * option and correspond to the "ANY" case. |
| 920 | */ |
| 921 | break; |
| 922 | } |
| 923 | |
| 924 | if (!parse_log_level_string( |
| 925 | log_level_str, event_rule_type, &log_level, &log_level_only)) { |
| 926 | ERR("Failed to parse log level string `%s`.", log_level_str); |
| 927 | goto error; |
| 928 | } |
| 929 | |
| 930 | if (log_level_only) { |
| 931 | log_level_rule = lttng_log_level_rule_exactly_create(log_level); |
| 932 | } else { |
| 933 | log_level_rule = lttng_log_level_rule_at_least_as_severe_as_create( |
| 934 | log_level); |
| 935 | } |
| 936 | |
| 937 | if (log_level_rule == nullptr) { |
| 938 | ERR("Failed to create log level rule object."); |
| 939 | goto error; |
| 940 | } |
| 941 | break; |
| 942 | } |
| 943 | default: |
| 944 | ERR("Log levels are not supported for %s event rules.", |
| 945 | lttng_event_rule_type_str(event_rule_type)); |
| 946 | goto error; |
| 947 | } |
| 948 | } |
| 949 | |
| 950 | /* Finally, create the event rule object. */ |
| 951 | switch (event_rule_type) { |
| 952 | case LTTNG_EVENT_RULE_TYPE_USER_TRACEPOINT: |
| 953 | { |
| 954 | enum lttng_event_rule_status event_rule_status; |
| 955 | |
| 956 | res.er = lttng_event_rule_user_tracepoint_create(); |
| 957 | if (!res.er) { |
| 958 | ERR("Failed to create user_tracepoint event rule."); |
| 959 | goto error; |
| 960 | } |
| 961 | |
| 962 | /* Set pattern. */ |
| 963 | event_rule_status = lttng_event_rule_user_tracepoint_set_name_pattern(res.er, name); |
| 964 | if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) { |
| 965 | ERR("Failed to set user_tracepoint event rule's pattern to '%s'.", name); |
| 966 | goto error; |
| 967 | } |
| 968 | |
| 969 | /* Set filter. */ |
| 970 | if (filter) { |
| 971 | event_rule_status = |
| 972 | lttng_event_rule_user_tracepoint_set_filter(res.er, filter); |
| 973 | if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) { |
| 974 | ERR("Failed to set user_tracepoint event rule's filter to '%s'.", |
| 975 | filter); |
| 976 | goto error; |
| 977 | } |
| 978 | } |
| 979 | |
| 980 | /* Set exclusion list. */ |
| 981 | if (lttng_dynamic_pointer_array_get_count(&exclude_names) > 0) { |
| 982 | int n; |
| 983 | int count = lttng_dynamic_pointer_array_get_count(&exclude_names); |
| 984 | |
| 985 | for (n = 0; n < count; n++) { |
| 986 | const char *exclude_name = |
| 987 | (const char *) lttng_dynamic_pointer_array_get_pointer( |
| 988 | &exclude_names, n); |
| 989 | |
| 990 | event_rule_status = |
| 991 | lttng_event_rule_user_tracepoint_add_name_pattern_exclusion( |
| 992 | res.er, exclude_name); |
| 993 | if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) { |
| 994 | ERR("Failed to set user_tracepoint exclusion list element '%s'", |
| 995 | exclude_name); |
| 996 | goto error; |
| 997 | } |
| 998 | } |
| 999 | } |
| 1000 | |
| 1001 | if (log_level_rule) { |
| 1002 | event_rule_status = lttng_event_rule_user_tracepoint_set_log_level_rule( |
| 1003 | res.er, log_level_rule); |
| 1004 | |
| 1005 | if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) { |
| 1006 | ERR("Failed to set log level on event fule."); |
| 1007 | goto error; |
| 1008 | } |
| 1009 | } |
| 1010 | |
| 1011 | break; |
| 1012 | } |
| 1013 | case LTTNG_EVENT_RULE_TYPE_KERNEL_TRACEPOINT: |
| 1014 | { |
| 1015 | enum lttng_event_rule_status event_rule_status; |
| 1016 | |
| 1017 | res.er = lttng_event_rule_kernel_tracepoint_create(); |
| 1018 | if (!res.er) { |
| 1019 | ERR("Failed to create kernel_tracepoint event rule."); |
| 1020 | goto error; |
| 1021 | } |
| 1022 | |
| 1023 | /* Set pattern. */ |
| 1024 | event_rule_status = |
| 1025 | lttng_event_rule_kernel_tracepoint_set_name_pattern(res.er, name); |
| 1026 | if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) { |
| 1027 | ERR("Failed to set kernel_tracepoint event rule's pattern to '%s'.", name); |
| 1028 | goto error; |
| 1029 | } |
| 1030 | |
| 1031 | /* Set filter. */ |
| 1032 | if (filter) { |
| 1033 | event_rule_status = |
| 1034 | lttng_event_rule_kernel_tracepoint_set_filter(res.er, filter); |
| 1035 | if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) { |
| 1036 | ERR("Failed to set kernel_tracepoint event rule's filter to '%s'.", |
| 1037 | filter); |
| 1038 | goto error; |
| 1039 | } |
| 1040 | } |
| 1041 | break; |
| 1042 | } |
| 1043 | case LTTNG_EVENT_RULE_TYPE_JUL_LOGGING: |
| 1044 | { |
| 1045 | enum lttng_event_rule_status event_rule_status; |
| 1046 | |
| 1047 | res.er = lttng_event_rule_jul_logging_create(); |
| 1048 | if (!res.er) { |
| 1049 | ERR("Failed to create jul_logging event rule."); |
| 1050 | goto error; |
| 1051 | } |
| 1052 | |
| 1053 | /* Set pattern. */ |
| 1054 | event_rule_status = lttng_event_rule_jul_logging_set_name_pattern(res.er, name); |
| 1055 | if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) { |
| 1056 | ERR("Failed to set jul_logging event rule's pattern to '%s'.", name); |
| 1057 | goto error; |
| 1058 | } |
| 1059 | |
| 1060 | /* Set filter. */ |
| 1061 | if (filter) { |
| 1062 | event_rule_status = lttng_event_rule_jul_logging_set_filter(res.er, filter); |
| 1063 | if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) { |
| 1064 | ERR("Failed to set jul_logging event rule's filter to '%s'.", |
| 1065 | filter); |
| 1066 | goto error; |
| 1067 | } |
| 1068 | } |
| 1069 | |
| 1070 | if (log_level_rule) { |
| 1071 | event_rule_status = lttng_event_rule_jul_logging_set_log_level_rule( |
| 1072 | res.er, log_level_rule); |
| 1073 | |
| 1074 | if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) { |
| 1075 | ERR("Failed to set log level on event fule."); |
| 1076 | goto error; |
| 1077 | } |
| 1078 | } |
| 1079 | break; |
| 1080 | } |
| 1081 | case LTTNG_EVENT_RULE_TYPE_LOG4J_LOGGING: |
| 1082 | { |
| 1083 | enum lttng_event_rule_status event_rule_status; |
| 1084 | |
| 1085 | res.er = lttng_event_rule_log4j_logging_create(); |
| 1086 | if (!res.er) { |
| 1087 | ERR("Failed to create jul_logging event rule."); |
| 1088 | goto error; |
| 1089 | } |
| 1090 | |
| 1091 | /* Set pattern. */ |
| 1092 | event_rule_status = lttng_event_rule_log4j_logging_set_name_pattern(res.er, name); |
| 1093 | if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) { |
| 1094 | ERR("Failed to set jul_logging event rule's pattern to '%s'.", name); |
| 1095 | goto error; |
| 1096 | } |
| 1097 | |
| 1098 | /* Set filter. */ |
| 1099 | if (filter) { |
| 1100 | event_rule_status = |
| 1101 | lttng_event_rule_log4j_logging_set_filter(res.er, filter); |
| 1102 | if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) { |
| 1103 | ERR("Failed to set jul_logging event rule's filter to '%s'.", |
| 1104 | filter); |
| 1105 | goto error; |
| 1106 | } |
| 1107 | } |
| 1108 | |
| 1109 | if (log_level_rule) { |
| 1110 | event_rule_status = lttng_event_rule_log4j_logging_set_log_level_rule( |
| 1111 | res.er, log_level_rule); |
| 1112 | |
| 1113 | if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) { |
| 1114 | ERR("Failed to set log level on event fule."); |
| 1115 | goto error; |
| 1116 | } |
| 1117 | } |
| 1118 | break; |
| 1119 | } |
| 1120 | case LTTNG_EVENT_RULE_TYPE_PYTHON_LOGGING: |
| 1121 | { |
| 1122 | enum lttng_event_rule_status event_rule_status; |
| 1123 | |
| 1124 | res.er = lttng_event_rule_python_logging_create(); |
| 1125 | if (!res.er) { |
| 1126 | ERR("Failed to create jul_logging event rule."); |
| 1127 | goto error; |
| 1128 | } |
| 1129 | |
| 1130 | /* Set pattern. */ |
| 1131 | event_rule_status = lttng_event_rule_python_logging_set_name_pattern(res.er, name); |
| 1132 | if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) { |
| 1133 | ERR("Failed to set jul_logging event rule's pattern to '%s'.", name); |
| 1134 | goto error; |
| 1135 | } |
| 1136 | |
| 1137 | /* Set filter. */ |
| 1138 | if (filter) { |
| 1139 | event_rule_status = |
| 1140 | lttng_event_rule_python_logging_set_filter(res.er, filter); |
| 1141 | if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) { |
| 1142 | ERR("Failed to set jul_logging event rule's filter to '%s'.", |
| 1143 | filter); |
| 1144 | goto error; |
| 1145 | } |
| 1146 | } |
| 1147 | |
| 1148 | if (log_level_rule) { |
| 1149 | event_rule_status = lttng_event_rule_python_logging_set_log_level_rule( |
| 1150 | res.er, log_level_rule); |
| 1151 | |
| 1152 | if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) { |
| 1153 | ERR("Failed to set log level on event fule."); |
| 1154 | goto error; |
| 1155 | } |
| 1156 | } |
| 1157 | break; |
| 1158 | } |
| 1159 | case LTTNG_EVENT_RULE_TYPE_KERNEL_KPROBE: |
| 1160 | { |
| 1161 | int ret; |
| 1162 | enum lttng_event_rule_status event_rule_status; |
| 1163 | |
| 1164 | ret = parse_kernel_probe_opts(location, &kernel_probe_location); |
| 1165 | if (ret) { |
| 1166 | ERR("Failed to parse kernel probe location."); |
| 1167 | goto error; |
| 1168 | } |
| 1169 | |
| 1170 | LTTNG_ASSERT(kernel_probe_location); |
| 1171 | res.er = lttng_event_rule_kernel_kprobe_create(kernel_probe_location); |
| 1172 | if (!res.er) { |
| 1173 | ERR("Failed to create kprobe event rule."); |
| 1174 | goto error; |
| 1175 | } |
| 1176 | |
| 1177 | event_rule_status = |
| 1178 | lttng_event_rule_kernel_kprobe_set_event_name(res.er, event_name); |
| 1179 | if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) { |
| 1180 | ERR("Failed to set kprobe event rule's name to '%s'.", event_name); |
| 1181 | goto error; |
| 1182 | } |
| 1183 | |
| 1184 | break; |
| 1185 | } |
| 1186 | case LTTNG_EVENT_RULE_TYPE_KERNEL_UPROBE: |
| 1187 | { |
| 1188 | int ret; |
| 1189 | enum lttng_event_rule_status event_rule_status; |
| 1190 | |
| 1191 | ret = parse_userspace_probe_opts(location, &userspace_probe_location); |
| 1192 | if (ret) { |
| 1193 | ERR("Failed to parse user space probe location."); |
| 1194 | goto error; |
| 1195 | } |
| 1196 | |
| 1197 | res.er = lttng_event_rule_kernel_uprobe_create(userspace_probe_location); |
| 1198 | if (!res.er) { |
| 1199 | ERR("Failed to create userspace probe event rule."); |
| 1200 | goto error; |
| 1201 | } |
| 1202 | |
| 1203 | event_rule_status = |
| 1204 | lttng_event_rule_kernel_uprobe_set_event_name(res.er, event_name); |
| 1205 | if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) { |
| 1206 | ERR("Failed to set user space probe event rule's name to '%s'.", |
| 1207 | event_name); |
| 1208 | goto error; |
| 1209 | } |
| 1210 | |
| 1211 | break; |
| 1212 | } |
| 1213 | case LTTNG_EVENT_RULE_TYPE_KERNEL_SYSCALL: |
| 1214 | { |
| 1215 | enum lttng_event_rule_status event_rule_status; |
| 1216 | enum lttng_event_rule_kernel_syscall_emission_site emission_site; |
| 1217 | |
| 1218 | if (!parse_syscall_emission_site_from_type(event_rule_type_str, &emission_site)) { |
| 1219 | ERR("Failed to parse syscall type '%s'.", event_rule_type_str); |
| 1220 | goto error; |
| 1221 | } |
| 1222 | |
| 1223 | res.er = lttng_event_rule_kernel_syscall_create(emission_site); |
| 1224 | if (!res.er) { |
| 1225 | ERR("Failed to create syscall event rule."); |
| 1226 | goto error; |
| 1227 | } |
| 1228 | |
| 1229 | event_rule_status = lttng_event_rule_kernel_syscall_set_name_pattern(res.er, name); |
| 1230 | if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) { |
| 1231 | ERR("Failed to set syscall event rule's pattern to '%s'.", name); |
| 1232 | goto error; |
| 1233 | } |
| 1234 | |
| 1235 | if (filter) { |
| 1236 | event_rule_status = |
| 1237 | lttng_event_rule_kernel_syscall_set_filter(res.er, filter); |
| 1238 | if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) { |
| 1239 | ERR("Failed to set syscall event rule's filter to '%s'.", filter); |
| 1240 | goto error; |
| 1241 | } |
| 1242 | } |
| 1243 | |
| 1244 | break; |
| 1245 | } |
| 1246 | default: |
| 1247 | abort(); |
| 1248 | goto error; |
| 1249 | } |
| 1250 | |
| 1251 | goto end; |
| 1252 | |
| 1253 | error: |
| 1254 | lttng_event_rule_destroy(res.er); |
| 1255 | res.er = nullptr; |
| 1256 | lttng_dynamic_pointer_array_reset(&res.capture_descriptors); |
| 1257 | |
| 1258 | end: |
| 1259 | if (parser_ctx) { |
| 1260 | filter_parser_ctx_free(parser_ctx); |
| 1261 | } |
| 1262 | |
| 1263 | lttng_event_expr_destroy(event_expr); |
| 1264 | argpar_item_destroy(argpar_item); |
| 1265 | argpar_iter_destroy(argpar_iter); |
| 1266 | free(filter); |
| 1267 | free(name); |
| 1268 | lttng_dynamic_pointer_array_reset(&exclude_names); |
| 1269 | free(log_level_str); |
| 1270 | free(location); |
| 1271 | free(event_name); |
| 1272 | free(event_rule_type_str); |
| 1273 | |
| 1274 | lttng_kernel_probe_location_destroy(kernel_probe_location); |
| 1275 | lttng_userspace_probe_location_destroy(userspace_probe_location); |
| 1276 | lttng_log_level_rule_destroy(log_level_rule); |
| 1277 | return res; |
| 1278 | } |
| 1279 | |
| 1280 | static struct lttng_condition * |
| 1281 | handle_condition_event(int *argc, const char ***argv, int argc_offset) |
| 1282 | { |
| 1283 | struct parse_event_rule_res res; |
| 1284 | struct lttng_condition *c; |
| 1285 | size_t i; |
| 1286 | |
| 1287 | res = parse_event_rule(argc, argv, argc_offset); |
| 1288 | if (!res.er) { |
| 1289 | c = nullptr; |
| 1290 | goto error; |
| 1291 | } |
| 1292 | |
| 1293 | c = lttng_condition_event_rule_matches_create(res.er); |
| 1294 | lttng_event_rule_destroy(res.er); |
| 1295 | res.er = nullptr; |
| 1296 | if (!c) { |
| 1297 | goto error; |
| 1298 | } |
| 1299 | |
| 1300 | for (i = 0; i < lttng_dynamic_pointer_array_get_count(&res.capture_descriptors); i++) { |
| 1301 | enum lttng_condition_status status; |
| 1302 | struct lttng_event_expr **expr = |
| 1303 | (lttng_event_expr **) lttng_dynamic_array_get_element( |
| 1304 | &res.capture_descriptors.array, i); |
| 1305 | |
| 1306 | LTTNG_ASSERT(expr); |
| 1307 | LTTNG_ASSERT(*expr); |
| 1308 | status = lttng_condition_event_rule_matches_append_capture_descriptor(c, *expr); |
| 1309 | if (status != LTTNG_CONDITION_STATUS_OK) { |
| 1310 | if (status == LTTNG_CONDITION_STATUS_UNSUPPORTED) { |
| 1311 | ERR("The capture feature is unsupported by the event-rule condition type"); |
| 1312 | } |
| 1313 | |
| 1314 | goto error; |
| 1315 | } |
| 1316 | |
| 1317 | /* Ownership of event expression moved to `c` */ |
| 1318 | *expr = nullptr; |
| 1319 | } |
| 1320 | |
| 1321 | goto end; |
| 1322 | |
| 1323 | error: |
| 1324 | lttng_condition_destroy(c); |
| 1325 | c = nullptr; |
| 1326 | |
| 1327 | end: |
| 1328 | lttng_dynamic_pointer_array_reset(&res.capture_descriptors); |
| 1329 | lttng_event_rule_destroy(res.er); |
| 1330 | return c; |
| 1331 | } |
| 1332 | |
| 1333 | namespace { |
| 1334 | struct condition_descr { |
| 1335 | const char *name; |
| 1336 | struct lttng_condition *(*handler)(int *argc, const char ***argv, int argc_offset); |
| 1337 | }; |
| 1338 | } /* namespace */ |
| 1339 | |
| 1340 | static const struct condition_descr condition_descrs[] = { |
| 1341 | { "event-rule-matches", handle_condition_event }, |
| 1342 | }; |
| 1343 | |
| 1344 | static void print_valid_condition_names() |
| 1345 | { |
| 1346 | unsigned int i; |
| 1347 | |
| 1348 | ERR("Valid condition names are:"); |
| 1349 | |
| 1350 | for (i = 0; i < ARRAY_SIZE(condition_descrs); ++i) { |
| 1351 | ERR(" %s", condition_descrs[i].name); |
| 1352 | } |
| 1353 | } |
| 1354 | |
| 1355 | static struct lttng_condition *parse_condition(const char *condition_name, |
| 1356 | int *argc, |
| 1357 | const char ***argv, |
| 1358 | int argc_offset, |
| 1359 | int orig_arg_index, |
| 1360 | const char *orig_arg) |
| 1361 | { |
| 1362 | int i; |
| 1363 | struct lttng_condition *cond; |
| 1364 | const struct condition_descr *descr = nullptr; |
| 1365 | |
| 1366 | for (i = 0; i < ARRAY_SIZE(condition_descrs); i++) { |
| 1367 | if (strcmp(condition_name, condition_descrs[i].name) == 0) { |
| 1368 | descr = &condition_descrs[i]; |
| 1369 | break; |
| 1370 | } |
| 1371 | } |
| 1372 | |
| 1373 | if (!descr) { |
| 1374 | ERR(WHILE_PARSING_ARG_N_ARG_FMT "Unknown condition name '%s'", |
| 1375 | orig_arg_index + 1, |
| 1376 | orig_arg, |
| 1377 | condition_name); |
| 1378 | print_valid_condition_names(); |
| 1379 | goto error; |
| 1380 | } |
| 1381 | |
| 1382 | cond = descr->handler(argc, argv, argc_offset); |
| 1383 | if (!cond) { |
| 1384 | /* The handler has already printed an error message. */ |
| 1385 | goto error; |
| 1386 | } |
| 1387 | |
| 1388 | goto end; |
| 1389 | error: |
| 1390 | cond = nullptr; |
| 1391 | end: |
| 1392 | return cond; |
| 1393 | } |
| 1394 | |
| 1395 | static struct lttng_rate_policy *parse_rate_policy(const char *policy_str) |
| 1396 | { |
| 1397 | int ret; |
| 1398 | size_t num_token = 0; |
| 1399 | struct lttng_dynamic_pointer_array tokens; |
| 1400 | struct lttng_rate_policy *policy = nullptr; |
| 1401 | enum lttng_rate_policy_type policy_type; |
| 1402 | unsigned long long value; |
| 1403 | char *policy_type_str; |
| 1404 | char *policy_value_str; |
| 1405 | |
| 1406 | LTTNG_ASSERT(policy_str); |
| 1407 | lttng_dynamic_pointer_array_init(&tokens, nullptr); |
| 1408 | |
| 1409 | /* Rate policy fields are separated by ':'. */ |
| 1410 | ret = strutils_split(policy_str, ':', true, &tokens); |
| 1411 | if (ret == 0) { |
| 1412 | num_token = lttng_dynamic_pointer_array_get_count(&tokens); |
| 1413 | } |
| 1414 | |
| 1415 | /* |
| 1416 | * Early sanity check that the number of parameter is exactly 2. |
| 1417 | * i.e : type:value |
| 1418 | */ |
| 1419 | if (num_token != 2) { |
| 1420 | ERR("Rate policy format is invalid."); |
| 1421 | goto end; |
| 1422 | } |
| 1423 | |
| 1424 | policy_type_str = (char *) lttng_dynamic_pointer_array_get_pointer(&tokens, 0); |
| 1425 | policy_value_str = (char *) lttng_dynamic_pointer_array_get_pointer(&tokens, 1); |
| 1426 | |
| 1427 | /* Parse the type. */ |
| 1428 | if (strcmp(policy_type_str, "once-after") == 0) { |
| 1429 | policy_type = LTTNG_RATE_POLICY_TYPE_ONCE_AFTER_N; |
| 1430 | } else if (strcmp(policy_type_str, "every") == 0) { |
| 1431 | policy_type = LTTNG_RATE_POLICY_TYPE_EVERY_N; |
| 1432 | } else { |
| 1433 | ERR("Rate policy type `%s` unknown.", policy_type_str); |
| 1434 | goto end; |
| 1435 | } |
| 1436 | |
| 1437 | /* Parse the value. */ |
| 1438 | if (utils_parse_unsigned_long_long(policy_value_str, &value) != 0) { |
| 1439 | ERR("Failed to parse rate policy value `%s` as an integer.", policy_value_str); |
| 1440 | goto end; |
| 1441 | } |
| 1442 | |
| 1443 | if (value == 0) { |
| 1444 | ERR("Rate policy value `%s` must be > 0.", policy_value_str); |
| 1445 | goto end; |
| 1446 | } |
| 1447 | |
| 1448 | switch (policy_type) { |
| 1449 | case LTTNG_RATE_POLICY_TYPE_EVERY_N: |
| 1450 | policy = lttng_rate_policy_every_n_create(value); |
| 1451 | break; |
| 1452 | case LTTNG_RATE_POLICY_TYPE_ONCE_AFTER_N: |
| 1453 | policy = lttng_rate_policy_once_after_n_create(value); |
| 1454 | break; |
| 1455 | default: |
| 1456 | abort(); |
| 1457 | } |
| 1458 | |
| 1459 | if (policy == nullptr) { |
| 1460 | ERR("Failed to create rate policy `%s`.", policy_str); |
| 1461 | } |
| 1462 | |
| 1463 | end: |
| 1464 | lttng_dynamic_pointer_array_reset(&tokens); |
| 1465 | return policy; |
| 1466 | } |
| 1467 | |
| 1468 | static const struct argpar_opt_descr notify_action_opt_descrs[] = { |
| 1469 | { OPT_RATE_POLICY, '\0', "rate-policy", true }, ARGPAR_OPT_DESCR_SENTINEL |
| 1470 | }; |
| 1471 | |
| 1472 | static struct lttng_action *handle_action_notify(int *argc, const char ***argv, int argc_offset) |
| 1473 | { |
| 1474 | struct lttng_action *action = nullptr; |
| 1475 | struct argpar_iter *argpar_iter = nullptr; |
| 1476 | const struct argpar_item *argpar_item = nullptr; |
| 1477 | struct lttng_rate_policy *policy = nullptr; |
| 1478 | |
| 1479 | argpar_iter = argpar_iter_create(*argc, *argv, notify_action_opt_descrs); |
| 1480 | if (!argpar_iter) { |
| 1481 | ERR("Failed to allocate an argpar iter."); |
| 1482 | goto error; |
| 1483 | } |
| 1484 | |
| 1485 | while (true) { |
| 1486 | enum parse_next_item_status status; |
| 1487 | |
| 1488 | status = parse_next_item(argpar_iter, |
| 1489 | &argpar_item, |
| 1490 | argc_offset, |
| 1491 | *argv, |
| 1492 | false, |
| 1493 | nullptr, |
| 1494 | "While parsing `notify` action:"); |
| 1495 | if (status == PARSE_NEXT_ITEM_STATUS_ERROR || |
| 1496 | status == PARSE_NEXT_ITEM_STATUS_ERROR_MEMORY) { |
| 1497 | goto error; |
| 1498 | } else if (status == PARSE_NEXT_ITEM_STATUS_END) { |
| 1499 | break; |
| 1500 | } |
| 1501 | |
| 1502 | LTTNG_ASSERT(status == PARSE_NEXT_ITEM_STATUS_OK); |
| 1503 | |
| 1504 | if (argpar_item_type(argpar_item) == ARGPAR_ITEM_TYPE_OPT) { |
| 1505 | const struct argpar_opt_descr *descr = argpar_item_opt_descr(argpar_item); |
| 1506 | const char *arg = argpar_item_opt_arg(argpar_item); |
| 1507 | |
| 1508 | switch (descr->id) { |
| 1509 | case OPT_RATE_POLICY: |
| 1510 | { |
| 1511 | policy = parse_rate_policy(arg); |
| 1512 | if (!policy) { |
| 1513 | goto error; |
| 1514 | } |
| 1515 | break; |
| 1516 | } |
| 1517 | default: |
| 1518 | abort(); |
| 1519 | } |
| 1520 | } else { |
| 1521 | const char *arg = argpar_item_non_opt_arg(argpar_item); |
| 1522 | |
| 1523 | ERR("Unexpected argument `%s`.", arg); |
| 1524 | goto error; |
| 1525 | } |
| 1526 | } |
| 1527 | |
| 1528 | *argc -= argpar_iter_ingested_orig_args(argpar_iter); |
| 1529 | *argv += argpar_iter_ingested_orig_args(argpar_iter); |
| 1530 | |
| 1531 | action = lttng_action_notify_create(); |
| 1532 | if (!action) { |
| 1533 | ERR("Failed to create notify action"); |
| 1534 | goto error; |
| 1535 | } |
| 1536 | |
| 1537 | if (policy) { |
| 1538 | enum lttng_action_status status; |
| 1539 | status = lttng_action_notify_set_rate_policy(action, policy); |
| 1540 | if (status != LTTNG_ACTION_STATUS_OK) { |
| 1541 | ERR("Failed to set rate policy"); |
| 1542 | goto error; |
| 1543 | } |
| 1544 | } |
| 1545 | |
| 1546 | goto end; |
| 1547 | |
| 1548 | error: |
| 1549 | lttng_action_destroy(action); |
| 1550 | action = nullptr; |
| 1551 | end: |
| 1552 | lttng_rate_policy_destroy(policy); |
| 1553 | argpar_item_destroy(argpar_item); |
| 1554 | argpar_iter_destroy(argpar_iter); |
| 1555 | return action; |
| 1556 | } |
| 1557 | |
| 1558 | /* |
| 1559 | * Generic handler for a kind of action that takes a session name and an |
| 1560 | * optional rate policy. |
| 1561 | */ |
| 1562 | |
| 1563 | static struct lttng_action *handle_action_simple_session_with_policy( |
| 1564 | int *argc, |
| 1565 | const char ***argv, |
| 1566 | int argc_offset, |
| 1567 | struct lttng_action *(*create_action_cb)(), |
| 1568 | enum lttng_action_status (*set_session_name_cb)(struct lttng_action *, const char *), |
| 1569 | enum lttng_action_status (*set_rate_policy_cb)(struct lttng_action *, |
| 1570 | const struct lttng_rate_policy *), |
| 1571 | const char *action_name) |
| 1572 | { |
| 1573 | struct lttng_action *action = nullptr; |
| 1574 | struct argpar_iter *argpar_iter = nullptr; |
| 1575 | const struct argpar_item *argpar_item = nullptr; |
| 1576 | const char *session_name_arg = nullptr; |
| 1577 | enum lttng_action_status action_status; |
| 1578 | struct lttng_rate_policy *policy = nullptr; |
| 1579 | |
| 1580 | LTTNG_ASSERT(set_session_name_cb); |
| 1581 | LTTNG_ASSERT(set_rate_policy_cb); |
| 1582 | |
| 1583 | const struct argpar_opt_descr rate_policy_opt_descrs[] = { |
| 1584 | { OPT_RATE_POLICY, '\0', "rate-policy", true }, ARGPAR_OPT_DESCR_SENTINEL |
| 1585 | }; |
| 1586 | |
| 1587 | argpar_iter = argpar_iter_create(*argc, *argv, rate_policy_opt_descrs); |
| 1588 | if (!argpar_iter) { |
| 1589 | ERR("Failed to allocate an argpar iter."); |
| 1590 | goto error; |
| 1591 | } |
| 1592 | |
| 1593 | while (true) { |
| 1594 | enum parse_next_item_status status; |
| 1595 | |
| 1596 | status = parse_next_item(argpar_iter, |
| 1597 | &argpar_item, |
| 1598 | argc_offset, |
| 1599 | *argv, |
| 1600 | false, |
| 1601 | nullptr, |
| 1602 | "While parsing `%s` action:", |
| 1603 | action_name); |
| 1604 | if (status == PARSE_NEXT_ITEM_STATUS_ERROR || |
| 1605 | status == PARSE_NEXT_ITEM_STATUS_ERROR_MEMORY) { |
| 1606 | goto error; |
| 1607 | } else if (status == PARSE_NEXT_ITEM_STATUS_END) { |
| 1608 | break; |
| 1609 | } |
| 1610 | |
| 1611 | LTTNG_ASSERT(status == PARSE_NEXT_ITEM_STATUS_OK); |
| 1612 | |
| 1613 | if (argpar_item_type(argpar_item) == ARGPAR_ITEM_TYPE_OPT) { |
| 1614 | const struct argpar_opt_descr *descr = argpar_item_opt_descr(argpar_item); |
| 1615 | const char *arg = argpar_item_opt_arg(argpar_item); |
| 1616 | |
| 1617 | switch (descr->id) { |
| 1618 | case OPT_RATE_POLICY: |
| 1619 | { |
| 1620 | policy = parse_rate_policy(arg); |
| 1621 | if (!policy) { |
| 1622 | goto error; |
| 1623 | } |
| 1624 | break; |
| 1625 | } |
| 1626 | default: |
| 1627 | abort(); |
| 1628 | } |
| 1629 | } else { |
| 1630 | const char *arg = argpar_item_non_opt_arg(argpar_item); |
| 1631 | unsigned int idx = argpar_item_non_opt_non_opt_index(argpar_item); |
| 1632 | |
| 1633 | switch (idx) { |
| 1634 | case 0: |
| 1635 | session_name_arg = arg; |
| 1636 | break; |
| 1637 | default: |
| 1638 | ERR("Unexpected argument `%s`.", arg); |
| 1639 | goto error; |
| 1640 | } |
| 1641 | } |
| 1642 | } |
| 1643 | |
| 1644 | *argc -= argpar_iter_ingested_orig_args(argpar_iter); |
| 1645 | *argv += argpar_iter_ingested_orig_args(argpar_iter); |
| 1646 | |
| 1647 | if (!session_name_arg) { |
| 1648 | ERR("Missing session name."); |
| 1649 | goto error; |
| 1650 | } |
| 1651 | |
| 1652 | action = create_action_cb(); |
| 1653 | if (!action) { |
| 1654 | ERR("Failed to allocate %s session action.", action_name); |
| 1655 | goto error; |
| 1656 | } |
| 1657 | |
| 1658 | action_status = set_session_name_cb(action, session_name_arg); |
| 1659 | if (action_status != LTTNG_ACTION_STATUS_OK) { |
| 1660 | ERR("Failed to set action %s session's session name to '%s'.", |
| 1661 | action_name, |
| 1662 | session_name_arg); |
| 1663 | goto error; |
| 1664 | } |
| 1665 | |
| 1666 | if (policy) { |
| 1667 | action_status = set_rate_policy_cb(action, policy); |
| 1668 | if (action_status != LTTNG_ACTION_STATUS_OK) { |
| 1669 | ERR("Failed to set rate policy"); |
| 1670 | goto error; |
| 1671 | } |
| 1672 | } |
| 1673 | |
| 1674 | goto end; |
| 1675 | |
| 1676 | error: |
| 1677 | lttng_action_destroy(action); |
| 1678 | action = nullptr; |
| 1679 | |
| 1680 | end: |
| 1681 | lttng_rate_policy_destroy(policy); |
| 1682 | argpar_item_destroy(argpar_item); |
| 1683 | argpar_iter_destroy(argpar_iter); |
| 1684 | return action; |
| 1685 | } |
| 1686 | |
| 1687 | static struct lttng_action * |
| 1688 | handle_action_start_session(int *argc, const char ***argv, int argc_offset) |
| 1689 | { |
| 1690 | return handle_action_simple_session_with_policy(argc, |
| 1691 | argv, |
| 1692 | argc_offset, |
| 1693 | lttng_action_start_session_create, |
| 1694 | lttng_action_start_session_set_session_name, |
| 1695 | lttng_action_start_session_set_rate_policy, |
| 1696 | "start"); |
| 1697 | } |
| 1698 | |
| 1699 | static struct lttng_action * |
| 1700 | handle_action_stop_session(int *argc, const char ***argv, int argc_offset) |
| 1701 | { |
| 1702 | return handle_action_simple_session_with_policy(argc, |
| 1703 | argv, |
| 1704 | argc_offset, |
| 1705 | lttng_action_stop_session_create, |
| 1706 | lttng_action_stop_session_set_session_name, |
| 1707 | lttng_action_stop_session_set_rate_policy, |
| 1708 | "stop"); |
| 1709 | } |
| 1710 | |
| 1711 | static struct lttng_action * |
| 1712 | handle_action_rotate_session(int *argc, const char ***argv, int argc_offset) |
| 1713 | { |
| 1714 | return handle_action_simple_session_with_policy( |
| 1715 | argc, |
| 1716 | argv, |
| 1717 | argc_offset, |
| 1718 | lttng_action_rotate_session_create, |
| 1719 | lttng_action_rotate_session_set_session_name, |
| 1720 | lttng_action_rotate_session_set_rate_policy, |
| 1721 | "rotate"); |
| 1722 | } |
| 1723 | |
| 1724 | static const struct argpar_opt_descr snapshot_action_opt_descrs[] = { |
| 1725 | { OPT_NAME, 'n', "name", true }, |
| 1726 | { OPT_MAX_SIZE, 'm', "max-size", true }, |
| 1727 | { OPT_CTRL_URL, '\0', "ctrl-url", true }, |
| 1728 | { OPT_DATA_URL, '\0', "data-url", true }, |
| 1729 | { OPT_URL, '\0', "url", true }, |
| 1730 | { OPT_PATH, '\0', "path", true }, |
| 1731 | { OPT_RATE_POLICY, '\0', "rate-policy", true }, |
| 1732 | ARGPAR_OPT_DESCR_SENTINEL |
| 1733 | }; |
| 1734 | |
| 1735 | static struct lttng_action * |
| 1736 | handle_action_snapshot_session(int *argc, const char ***argv, int argc_offset) |
| 1737 | { |
| 1738 | struct lttng_action *action = nullptr; |
| 1739 | struct argpar_iter *argpar_iter = nullptr; |
| 1740 | const struct argpar_item *argpar_item = nullptr; |
| 1741 | const char *session_name_arg = nullptr; |
| 1742 | char *snapshot_name_arg = nullptr; |
| 1743 | char *ctrl_url_arg = nullptr; |
| 1744 | char *data_url_arg = nullptr; |
| 1745 | char *max_size_arg = nullptr; |
| 1746 | char *url_arg = nullptr; |
| 1747 | char *path_arg = nullptr; |
| 1748 | char *error = nullptr; |
| 1749 | enum lttng_action_status action_status; |
| 1750 | struct lttng_snapshot_output *snapshot_output = nullptr; |
| 1751 | struct lttng_rate_policy *policy = nullptr; |
| 1752 | int ret; |
| 1753 | unsigned int locations_specified = 0; |
| 1754 | |
| 1755 | argpar_iter = argpar_iter_create(*argc, *argv, snapshot_action_opt_descrs); |
| 1756 | if (!argpar_iter) { |
| 1757 | ERR("Failed to allocate an argpar iter."); |
| 1758 | goto error; |
| 1759 | } |
| 1760 | |
| 1761 | while (true) { |
| 1762 | enum parse_next_item_status status; |
| 1763 | |
| 1764 | status = parse_next_item(argpar_iter, |
| 1765 | &argpar_item, |
| 1766 | argc_offset, |
| 1767 | *argv, |
| 1768 | false, |
| 1769 | nullptr, |
| 1770 | "While parsing `snapshot` action:"); |
| 1771 | if (status == PARSE_NEXT_ITEM_STATUS_ERROR || |
| 1772 | status == PARSE_NEXT_ITEM_STATUS_ERROR_MEMORY) { |
| 1773 | goto error; |
| 1774 | } else if (status == PARSE_NEXT_ITEM_STATUS_END) { |
| 1775 | break; |
| 1776 | } |
| 1777 | |
| 1778 | LTTNG_ASSERT(status == PARSE_NEXT_ITEM_STATUS_OK); |
| 1779 | |
| 1780 | if (argpar_item_type(argpar_item) == ARGPAR_ITEM_TYPE_OPT) { |
| 1781 | const struct argpar_opt_descr *descr = argpar_item_opt_descr(argpar_item); |
| 1782 | const char *arg = argpar_item_opt_arg(argpar_item); |
| 1783 | |
| 1784 | switch (descr->id) { |
| 1785 | case OPT_NAME: |
| 1786 | if (!assign_string(&snapshot_name_arg, arg, "--name/-n")) { |
| 1787 | goto error; |
| 1788 | } |
| 1789 | |
| 1790 | break; |
| 1791 | case OPT_MAX_SIZE: |
| 1792 | if (!assign_string(&max_size_arg, arg, "--max-size/-m")) { |
| 1793 | goto error; |
| 1794 | } |
| 1795 | |
| 1796 | break; |
| 1797 | case OPT_CTRL_URL: |
| 1798 | if (!assign_string(&ctrl_url_arg, arg, "--ctrl-url")) { |
| 1799 | goto error; |
| 1800 | } |
| 1801 | |
| 1802 | break; |
| 1803 | case OPT_DATA_URL: |
| 1804 | if (!assign_string(&data_url_arg, arg, "--data-url")) { |
| 1805 | goto error; |
| 1806 | } |
| 1807 | |
| 1808 | break; |
| 1809 | case OPT_URL: |
| 1810 | if (!assign_string(&url_arg, arg, "--url")) { |
| 1811 | goto error; |
| 1812 | } |
| 1813 | |
| 1814 | break; |
| 1815 | case OPT_PATH: |
| 1816 | if (!assign_string(&path_arg, arg, "--path")) { |
| 1817 | goto error; |
| 1818 | } |
| 1819 | |
| 1820 | break; |
| 1821 | case OPT_RATE_POLICY: |
| 1822 | { |
| 1823 | policy = parse_rate_policy(arg); |
| 1824 | if (!policy) { |
| 1825 | goto error; |
| 1826 | } |
| 1827 | break; |
| 1828 | } |
| 1829 | default: |
| 1830 | abort(); |
| 1831 | } |
| 1832 | } else { |
| 1833 | const char *arg = argpar_item_non_opt_arg(argpar_item); |
| 1834 | const unsigned int idx = argpar_item_non_opt_non_opt_index(argpar_item); |
| 1835 | |
| 1836 | switch (idx) { |
| 1837 | case 0: |
| 1838 | session_name_arg = arg; |
| 1839 | break; |
| 1840 | default: |
| 1841 | ERR("Unexpected argument `%s`.", arg); |
| 1842 | goto error; |
| 1843 | } |
| 1844 | } |
| 1845 | } |
| 1846 | |
| 1847 | *argc -= argpar_iter_ingested_orig_args(argpar_iter); |
| 1848 | *argv += argpar_iter_ingested_orig_args(argpar_iter); |
| 1849 | |
| 1850 | if (!session_name_arg) { |
| 1851 | ERR("Missing session name."); |
| 1852 | goto error; |
| 1853 | } |
| 1854 | |
| 1855 | /* --ctrl-url and --data-url must come in pair. */ |
| 1856 | if (ctrl_url_arg && !data_url_arg) { |
| 1857 | ERR("--ctrl-url is specified, but --data-url is missing."); |
| 1858 | goto error; |
| 1859 | } |
| 1860 | |
| 1861 | if (!ctrl_url_arg && data_url_arg) { |
| 1862 | ERR("--data-url is specified, but --ctrl-url is missing."); |
| 1863 | goto error; |
| 1864 | } |
| 1865 | |
| 1866 | locations_specified += !!(ctrl_url_arg || data_url_arg); |
| 1867 | locations_specified += !!url_arg; |
| 1868 | locations_specified += !!path_arg; |
| 1869 | |
| 1870 | /* --ctrl-url/--data-url, --url and --path are mutually exclusive. */ |
| 1871 | if (locations_specified > 1) { |
| 1872 | ERR("The --ctrl-url/--data-url, --url, and --path options can't be used together."); |
| 1873 | goto error; |
| 1874 | } |
| 1875 | |
| 1876 | /* |
| 1877 | * Did the user specify an option that implies using a |
| 1878 | * custom/unregistered output? |
| 1879 | */ |
| 1880 | if (url_arg || ctrl_url_arg || path_arg) { |
| 1881 | snapshot_output = lttng_snapshot_output_create(); |
| 1882 | if (!snapshot_output) { |
| 1883 | ERR("Failed to allocate a snapshot output."); |
| 1884 | goto error; |
| 1885 | } |
| 1886 | } |
| 1887 | |
| 1888 | action = lttng_action_snapshot_session_create(); |
| 1889 | if (!action) { |
| 1890 | ERR("Failed to allocate snapshot session action."); |
| 1891 | goto error; |
| 1892 | } |
| 1893 | |
| 1894 | action_status = lttng_action_snapshot_session_set_session_name(action, session_name_arg); |
| 1895 | if (action_status != LTTNG_ACTION_STATUS_OK) { |
| 1896 | ERR("Failed to set action snapshot session's session name to '%s'.", |
| 1897 | session_name_arg); |
| 1898 | goto error; |
| 1899 | } |
| 1900 | |
| 1901 | if (snapshot_name_arg) { |
| 1902 | if (!snapshot_output) { |
| 1903 | ERR("Can't provide a snapshot output name without a snapshot output destination."); |
| 1904 | goto error; |
| 1905 | } |
| 1906 | |
| 1907 | ret = lttng_snapshot_output_set_name(snapshot_name_arg, snapshot_output); |
| 1908 | if (ret != 0) { |
| 1909 | ERR("Failed to set name of snapshot output."); |
| 1910 | goto error; |
| 1911 | } |
| 1912 | } |
| 1913 | |
| 1914 | if (max_size_arg) { |
| 1915 | uint64_t max_size; |
| 1916 | |
| 1917 | if (!snapshot_output) { |
| 1918 | ERR("Can't provide a snapshot output max size without a snapshot output destination."); |
| 1919 | goto error; |
| 1920 | } |
| 1921 | |
| 1922 | ret = utils_parse_size_suffix(max_size_arg, &max_size); |
| 1923 | if (ret != 0) { |
| 1924 | ERR("Failed to parse `%s` as a size.", max_size_arg); |
| 1925 | goto error; |
| 1926 | } |
| 1927 | |
| 1928 | ret = lttng_snapshot_output_set_size(max_size, snapshot_output); |
| 1929 | if (ret != 0) { |
| 1930 | ERR("Failed to set snapshot output's max size to %" PRIu64 " bytes.", |
| 1931 | max_size); |
| 1932 | goto error; |
| 1933 | } |
| 1934 | } |
| 1935 | |
| 1936 | if (url_arg) { |
| 1937 | int num_uris; |
| 1938 | struct lttng_uri *uris; |
| 1939 | |
| 1940 | if (!strstr(url_arg, "://")) { |
| 1941 | ERR("Failed to parse '%s' as an URL.", url_arg); |
| 1942 | goto error; |
| 1943 | } |
| 1944 | |
| 1945 | num_uris = uri_parse_str_urls(url_arg, nullptr, &uris); |
| 1946 | if (num_uris < 1) { |
| 1947 | ERR("Failed to parse '%s' as an URL.", url_arg); |
| 1948 | goto error; |
| 1949 | } |
| 1950 | |
| 1951 | if (uris[0].dtype == LTTNG_DST_PATH) { |
| 1952 | ret = lttng_snapshot_output_set_local_path(uris[0].dst.path, |
| 1953 | snapshot_output); |
| 1954 | free(uris); |
| 1955 | if (ret != 0) { |
| 1956 | ERR("Failed to assign '%s' as a local destination.", url_arg); |
| 1957 | goto error; |
| 1958 | } |
| 1959 | } else { |
| 1960 | ret = lttng_snapshot_output_set_network_url(url_arg, snapshot_output); |
| 1961 | free(uris); |
| 1962 | if (ret != 0) { |
| 1963 | ERR("Failed to assign '%s' as a network URL.", url_arg); |
| 1964 | goto error; |
| 1965 | } |
| 1966 | } |
| 1967 | } |
| 1968 | |
| 1969 | if (path_arg) { |
| 1970 | ret = lttng_snapshot_output_set_local_path(path_arg, snapshot_output); |
| 1971 | if (ret != 0) { |
| 1972 | ERR("Failed to parse '%s' as a local path.", path_arg); |
| 1973 | goto error; |
| 1974 | } |
| 1975 | } |
| 1976 | |
| 1977 | if (ctrl_url_arg) { |
| 1978 | /* |
| 1979 | * Two argument form, network output with separate control and |
| 1980 | * data URLs. |
| 1981 | */ |
| 1982 | ret = lttng_snapshot_output_set_network_urls( |
| 1983 | ctrl_url_arg, data_url_arg, snapshot_output); |
| 1984 | if (ret != 0) { |
| 1985 | ERR("Failed to parse `%s` and `%s` as control and data URLs.", |
| 1986 | ctrl_url_arg, |
| 1987 | data_url_arg); |
| 1988 | goto error; |
| 1989 | } |
| 1990 | } |
| 1991 | |
| 1992 | if (snapshot_output) { |
| 1993 | action_status = lttng_action_snapshot_session_set_output(action, snapshot_output); |
| 1994 | if (action_status != LTTNG_ACTION_STATUS_OK) { |
| 1995 | ERR("Failed to set snapshot session action's output."); |
| 1996 | goto error; |
| 1997 | } |
| 1998 | |
| 1999 | /* Ownership of `snapshot_output` has been transferred to the action. */ |
| 2000 | snapshot_output = nullptr; |
| 2001 | } |
| 2002 | |
| 2003 | if (policy) { |
| 2004 | enum lttng_action_status status; |
| 2005 | status = lttng_action_snapshot_session_set_rate_policy(action, policy); |
| 2006 | if (status != LTTNG_ACTION_STATUS_OK) { |
| 2007 | ERR("Failed to set rate policy"); |
| 2008 | goto error; |
| 2009 | } |
| 2010 | } |
| 2011 | |
| 2012 | goto end; |
| 2013 | |
| 2014 | error: |
| 2015 | lttng_action_destroy(action); |
| 2016 | action = nullptr; |
| 2017 | free(error); |
| 2018 | end: |
| 2019 | free(snapshot_name_arg); |
| 2020 | free(path_arg); |
| 2021 | free(url_arg); |
| 2022 | free(ctrl_url_arg); |
| 2023 | free(data_url_arg); |
| 2024 | free(snapshot_output); |
| 2025 | free(max_size_arg); |
| 2026 | lttng_rate_policy_destroy(policy); |
| 2027 | argpar_item_destroy(argpar_item); |
| 2028 | argpar_iter_destroy(argpar_iter); |
| 2029 | return action; |
| 2030 | } |
| 2031 | |
| 2032 | namespace { |
| 2033 | struct action_descr { |
| 2034 | const char *name; |
| 2035 | struct lttng_action *(*handler)(int *argc, const char ***argv, int argc_offset); |
| 2036 | }; |
| 2037 | } /* namespace */ |
| 2038 | |
| 2039 | static const struct action_descr action_descrs[] = { |
| 2040 | { "notify", handle_action_notify }, |
| 2041 | { "start-session", handle_action_start_session }, |
| 2042 | { "stop-session", handle_action_stop_session }, |
| 2043 | { "rotate-session", handle_action_rotate_session }, |
| 2044 | { "snapshot-session", handle_action_snapshot_session }, |
| 2045 | }; |
| 2046 | |
| 2047 | static void print_valid_action_names() |
| 2048 | { |
| 2049 | unsigned int i; |
| 2050 | |
| 2051 | ERR("Valid action names are:"); |
| 2052 | |
| 2053 | for (i = 0; i < ARRAY_SIZE(condition_descrs); ++i) { |
| 2054 | ERR(" %s", action_descrs[i].name); |
| 2055 | } |
| 2056 | } |
| 2057 | |
| 2058 | static struct lttng_action *parse_action(const char *action_name, |
| 2059 | int *argc, |
| 2060 | const char ***argv, |
| 2061 | int argc_offset, |
| 2062 | int orig_arg_index, |
| 2063 | const char *orig_arg) |
| 2064 | { |
| 2065 | int i; |
| 2066 | struct lttng_action *action; |
| 2067 | const struct action_descr *descr = nullptr; |
| 2068 | |
| 2069 | for (i = 0; i < ARRAY_SIZE(action_descrs); i++) { |
| 2070 | if (strcmp(action_name, action_descrs[i].name) == 0) { |
| 2071 | descr = &action_descrs[i]; |
| 2072 | break; |
| 2073 | } |
| 2074 | } |
| 2075 | |
| 2076 | if (!descr) { |
| 2077 | ERR(WHILE_PARSING_ARG_N_ARG_FMT "Unknown action name '%s'", |
| 2078 | orig_arg_index + 1, |
| 2079 | orig_arg, |
| 2080 | action_name); |
| 2081 | print_valid_action_names(); |
| 2082 | goto error; |
| 2083 | } |
| 2084 | |
| 2085 | action = descr->handler(argc, argv, argc_offset); |
| 2086 | if (!action) { |
| 2087 | /* The handler has already printed an error message. */ |
| 2088 | goto error; |
| 2089 | } |
| 2090 | |
| 2091 | goto end; |
| 2092 | error: |
| 2093 | action = nullptr; |
| 2094 | end: |
| 2095 | return action; |
| 2096 | } |
| 2097 | |
| 2098 | static const struct argpar_opt_descr add_trigger_options[] = { |
| 2099 | { OPT_HELP, 'h', "help", false }, |
| 2100 | { OPT_LIST_OPTIONS, '\0', "list-options", false }, |
| 2101 | { OPT_CONDITION, '\0', "condition", true }, |
| 2102 | { OPT_ACTION, '\0', "action", true }, |
| 2103 | { OPT_NAME, '\0', "name", true }, |
| 2104 | { OPT_OWNER_UID, '\0', "owner-uid", true }, |
| 2105 | ARGPAR_OPT_DESCR_SENTINEL, |
| 2106 | }; |
| 2107 | |
| 2108 | static void lttng_actions_destructor(void *p) |
| 2109 | { |
| 2110 | struct lttng_action *action = (lttng_action *) p; |
| 2111 | |
| 2112 | lttng_action_destroy(action); |
| 2113 | } |
| 2114 | |
| 2115 | int cmd_add_trigger(int argc, const char **argv) |
| 2116 | { |
| 2117 | int ret; |
| 2118 | int my_argc = argc - 1; |
| 2119 | const char **my_argv = argv + 1; |
| 2120 | struct lttng_condition *condition = nullptr; |
| 2121 | struct lttng_dynamic_pointer_array actions; |
| 2122 | struct argpar_iter *argpar_iter = nullptr; |
| 2123 | const struct argpar_item *argpar_item = nullptr; |
| 2124 | const struct argpar_error *argpar_error = nullptr; |
| 2125 | struct lttng_action *action_list = nullptr; |
| 2126 | struct lttng_action *action = nullptr; |
| 2127 | struct lttng_trigger *trigger = nullptr; |
| 2128 | char *name = nullptr; |
| 2129 | int i; |
| 2130 | char *owner_uid = nullptr; |
| 2131 | enum lttng_error_code ret_code; |
| 2132 | struct mi_writer *mi_writer = nullptr; |
| 2133 | |
| 2134 | lttng_dynamic_pointer_array_init(&actions, lttng_actions_destructor); |
| 2135 | |
| 2136 | if (lttng_opt_mi) { |
| 2137 | mi_writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi); |
| 2138 | if (!mi_writer) { |
| 2139 | ret = CMD_ERROR; |
| 2140 | goto error; |
| 2141 | } |
| 2142 | |
| 2143 | /* Open command element. */ |
| 2144 | ret = mi_lttng_writer_command_open(mi_writer, mi_lttng_element_command_add_trigger); |
| 2145 | if (ret) { |
| 2146 | ret = CMD_ERROR; |
| 2147 | goto error; |
| 2148 | } |
| 2149 | |
| 2150 | /* Open output element. */ |
| 2151 | ret = mi_lttng_writer_open_element(mi_writer, mi_lttng_element_command_output); |
| 2152 | if (ret) { |
| 2153 | ret = CMD_ERROR; |
| 2154 | goto error; |
| 2155 | } |
| 2156 | } |
| 2157 | |
| 2158 | while (true) { |
| 2159 | enum parse_next_item_status status; |
| 2160 | int ingested_args; |
| 2161 | const struct argpar_opt_descr *descr; |
| 2162 | const char *arg; |
| 2163 | |
| 2164 | argpar_iter_destroy(argpar_iter); |
| 2165 | argpar_iter = argpar_iter_create(my_argc, my_argv, add_trigger_options); |
| 2166 | if (!argpar_iter) { |
| 2167 | ERR("Failed to create argpar iter."); |
| 2168 | goto error; |
| 2169 | } |
| 2170 | |
| 2171 | status = parse_next_item(argpar_iter, |
| 2172 | &argpar_item, |
| 2173 | argc - my_argc, |
| 2174 | my_argv, |
| 2175 | true, |
| 2176 | &argpar_error, |
| 2177 | nullptr); |
| 2178 | if (status == PARSE_NEXT_ITEM_STATUS_ERROR) { |
| 2179 | if (argpar_error_type(argpar_error) == ARGPAR_ERROR_TYPE_MISSING_OPT_ARG) { |
| 2180 | int opt_id = argpar_error_opt_descr(argpar_error, nullptr)->id; |
| 2181 | |
| 2182 | if (opt_id == OPT_CONDITION) { |
| 2183 | print_valid_condition_names(); |
| 2184 | } else if (opt_id == OPT_ACTION) { |
| 2185 | print_valid_action_names(); |
| 2186 | } |
| 2187 | } |
| 2188 | |
| 2189 | goto error; |
| 2190 | } else if (status == PARSE_NEXT_ITEM_STATUS_ERROR_MEMORY) { |
| 2191 | goto error; |
| 2192 | } else if (status == PARSE_NEXT_ITEM_STATUS_END) { |
| 2193 | break; |
| 2194 | } |
| 2195 | |
| 2196 | LTTNG_ASSERT(status == PARSE_NEXT_ITEM_STATUS_OK); |
| 2197 | |
| 2198 | if (argpar_item_type(argpar_item) == ARGPAR_ITEM_TYPE_NON_OPT) { |
| 2199 | ERR("Unexpected argument `%s`.", argpar_item_non_opt_arg(argpar_item)); |
| 2200 | goto error; |
| 2201 | } |
| 2202 | |
| 2203 | ingested_args = argpar_iter_ingested_orig_args(argpar_iter); |
| 2204 | |
| 2205 | my_argc -= ingested_args; |
| 2206 | my_argv += ingested_args; |
| 2207 | |
| 2208 | descr = argpar_item_opt_descr(argpar_item); |
| 2209 | arg = argpar_item_opt_arg(argpar_item); |
| 2210 | |
| 2211 | switch (descr->id) { |
| 2212 | case OPT_HELP: |
| 2213 | SHOW_HELP(); |
| 2214 | ret = 0; |
| 2215 | goto end; |
| 2216 | case OPT_LIST_OPTIONS: |
| 2217 | list_cmd_options_argpar(stdout, add_trigger_options); |
| 2218 | ret = 0; |
| 2219 | goto end; |
| 2220 | case OPT_CONDITION: |
| 2221 | { |
| 2222 | if (condition) { |
| 2223 | ERR("A --condition was already given."); |
| 2224 | goto error; |
| 2225 | } |
| 2226 | |
| 2227 | condition = parse_condition(arg, |
| 2228 | &my_argc, |
| 2229 | &my_argv, |
| 2230 | argc - my_argc, |
| 2231 | argc - my_argc - ingested_args, |
| 2232 | my_argv[-ingested_args]); |
| 2233 | if (!condition) { |
| 2234 | /* |
| 2235 | * An error message was already printed by |
| 2236 | * parse_condition. |
| 2237 | */ |
| 2238 | goto error; |
| 2239 | } |
| 2240 | |
| 2241 | break; |
| 2242 | } |
| 2243 | case OPT_ACTION: |
| 2244 | { |
| 2245 | action = parse_action(arg, |
| 2246 | &my_argc, |
| 2247 | &my_argv, |
| 2248 | argc - my_argc, |
| 2249 | argc - my_argc - ingested_args, |
| 2250 | my_argv[-ingested_args]); |
| 2251 | if (!action) { |
| 2252 | /* |
| 2253 | * An error message was already printed by |
| 2254 | * parse_condition. |
| 2255 | */ |
| 2256 | goto error; |
| 2257 | } |
| 2258 | |
| 2259 | ret = lttng_dynamic_pointer_array_add_pointer(&actions, action); |
| 2260 | if (ret) { |
| 2261 | ERR("Failed to add pointer to pointer array."); |
| 2262 | goto error; |
| 2263 | } |
| 2264 | |
| 2265 | /* Ownership of the action was transferred to the list. */ |
| 2266 | action = nullptr; |
| 2267 | |
| 2268 | break; |
| 2269 | } |
| 2270 | case OPT_NAME: |
| 2271 | { |
| 2272 | if (!assign_string(&name, arg, "--name")) { |
| 2273 | goto error; |
| 2274 | } |
| 2275 | |
| 2276 | break; |
| 2277 | } |
| 2278 | case OPT_OWNER_UID: |
| 2279 | { |
| 2280 | if (!assign_string(&owner_uid, arg, "--owner-uid")) { |
| 2281 | goto error; |
| 2282 | } |
| 2283 | |
| 2284 | break; |
| 2285 | } |
| 2286 | default: |
| 2287 | abort(); |
| 2288 | } |
| 2289 | } |
| 2290 | |
| 2291 | if (!condition) { |
| 2292 | ERR("Missing --condition."); |
| 2293 | goto error; |
| 2294 | } |
| 2295 | |
| 2296 | if (lttng_dynamic_pointer_array_get_count(&actions) == 0) { |
| 2297 | ERR("Need at least one --action."); |
| 2298 | goto error; |
| 2299 | } |
| 2300 | |
| 2301 | action_list = lttng_action_list_create(); |
| 2302 | if (!action_list) { |
| 2303 | goto error; |
| 2304 | } |
| 2305 | |
| 2306 | for (i = 0; i < lttng_dynamic_pointer_array_get_count(&actions); i++) { |
| 2307 | enum lttng_action_status status; |
| 2308 | |
| 2309 | action = (lttng_action *) lttng_dynamic_pointer_array_steal_pointer(&actions, i); |
| 2310 | |
| 2311 | status = lttng_action_list_add_action(action_list, action); |
| 2312 | if (status != LTTNG_ACTION_STATUS_OK) { |
| 2313 | goto error; |
| 2314 | } |
| 2315 | |
| 2316 | /* |
| 2317 | * The `lttng_action_list_add_action()` takes a reference to |
| 2318 | * the action. We can destroy ours. |
| 2319 | */ |
| 2320 | lttng_action_destroy(action); |
| 2321 | action = nullptr; |
| 2322 | } |
| 2323 | |
| 2324 | trigger = lttng_trigger_create(condition, action_list); |
| 2325 | if (!trigger) { |
| 2326 | goto error; |
| 2327 | } |
| 2328 | |
| 2329 | if (owner_uid) { |
| 2330 | enum lttng_trigger_status trigger_status; |
| 2331 | char *end; |
| 2332 | long long uid; |
| 2333 | |
| 2334 | errno = 0; |
| 2335 | uid = strtol(owner_uid, &end, 10); |
| 2336 | if (end == owner_uid || *end != '\0' || errno != 0) { |
| 2337 | ERR("Failed to parse `%s` as a user id.", owner_uid); |
| 2338 | goto error; |
| 2339 | } |
| 2340 | |
| 2341 | trigger_status = lttng_trigger_set_owner_uid(trigger, uid); |
| 2342 | if (trigger_status != LTTNG_TRIGGER_STATUS_OK) { |
| 2343 | ERR("Failed to set trigger's user identity."); |
| 2344 | goto error; |
| 2345 | } |
| 2346 | } |
| 2347 | |
| 2348 | if (name) { |
| 2349 | ret_code = lttng_register_trigger_with_name(trigger, name); |
| 2350 | } else { |
| 2351 | ret_code = lttng_register_trigger_with_automatic_name(trigger); |
| 2352 | } |
| 2353 | |
| 2354 | if (ret_code != LTTNG_OK) { |
| 2355 | ERR("Failed to register trigger: %s.", lttng_strerror(-ret_code)); |
| 2356 | goto error; |
| 2357 | } |
| 2358 | |
| 2359 | if (lttng_opt_mi) { |
| 2360 | ret_code = lttng_trigger_mi_serialize(trigger, mi_writer, nullptr); |
| 2361 | if (ret_code != LTTNG_OK) { |
| 2362 | goto error; |
| 2363 | } |
| 2364 | } else { |
| 2365 | const char *returned_trigger_name; |
| 2366 | const enum lttng_trigger_status trigger_status = |
| 2367 | lttng_trigger_get_name(trigger, &returned_trigger_name); |
| 2368 | |
| 2369 | if (trigger_status != LTTNG_TRIGGER_STATUS_OK) { |
| 2370 | WARN("Failed to retrieve the added trigger's name."); |
| 2371 | } else { |
| 2372 | MSG("Added trigger `%s`.", returned_trigger_name); |
| 2373 | } |
| 2374 | } |
| 2375 | |
| 2376 | ret = 0; |
| 2377 | |
| 2378 | goto end; |
| 2379 | |
| 2380 | error: |
| 2381 | ret = 1; |
| 2382 | |
| 2383 | end: |
| 2384 | /* Mi closing. */ |
| 2385 | if (lttng_opt_mi && mi_writer) { |
| 2386 | int mi_ret; |
| 2387 | |
| 2388 | /* Close output element. */ |
| 2389 | mi_ret = mi_lttng_writer_close_element(mi_writer); |
| 2390 | if (mi_ret) { |
| 2391 | ret = 1; |
| 2392 | goto cleanup; |
| 2393 | } |
| 2394 | |
| 2395 | mi_ret = mi_lttng_writer_write_element_bool( |
| 2396 | mi_writer, mi_lttng_element_command_success, ret ? 0 : 1); |
| 2397 | if (mi_ret) { |
| 2398 | ret = 1; |
| 2399 | goto cleanup; |
| 2400 | } |
| 2401 | |
| 2402 | /* Command element close. */ |
| 2403 | mi_ret = mi_lttng_writer_command_close(mi_writer); |
| 2404 | if (mi_ret) { |
| 2405 | ret = 1; |
| 2406 | goto cleanup; |
| 2407 | } |
| 2408 | } |
| 2409 | |
| 2410 | cleanup: |
| 2411 | argpar_error_destroy(argpar_error); |
| 2412 | argpar_iter_destroy(argpar_iter); |
| 2413 | argpar_item_destroy(argpar_item); |
| 2414 | lttng_dynamic_pointer_array_reset(&actions); |
| 2415 | lttng_condition_destroy(condition); |
| 2416 | lttng_action_destroy(action_list); |
| 2417 | lttng_action_destroy(action); |
| 2418 | lttng_trigger_destroy(trigger); |
| 2419 | free(name); |
| 2420 | free(owner_uid); |
| 2421 | if (mi_writer && mi_lttng_writer_destroy(mi_writer)) { |
| 2422 | /* Preserve original error code. */ |
| 2423 | ret = ret ? ret : CMD_ERROR; |
| 2424 | } |
| 2425 | |
| 2426 | return ret; |
| 2427 | } |