| 1 | /* |
| 2 | * Copyright (C) 2014 David Goulet <dgoulet@efficios.com> |
| 3 | * |
| 4 | * SPDX-License-Identifier: LGPL-2.1-only |
| 5 | * |
| 6 | */ |
| 7 | |
| 8 | #define _LGPL_SOURCE |
| 9 | #include <string.h> |
| 10 | #include <limits.h> |
| 11 | |
| 12 | #include <lttng/lttng-error.h> |
| 13 | #include <lttng/load.h> |
| 14 | #include <lttng/load-internal.hpp> |
| 15 | #include <common/sessiond-comm/sessiond-comm.hpp> |
| 16 | #include <common/config/session-config.hpp> |
| 17 | #include <common/uri.hpp> |
| 18 | #include <common/macros.hpp> |
| 19 | #include <common/compat/string.hpp> |
| 20 | |
| 21 | #include "lttng-ctl-helper.hpp" |
| 22 | |
| 23 | struct lttng_load_session_attr *lttng_load_session_attr_create(void) |
| 24 | { |
| 25 | return zmalloc<lttng_load_session_attr>(); |
| 26 | } |
| 27 | |
| 28 | static |
| 29 | void reset_load_session_attr_urls(struct lttng_load_session_attr *attr) |
| 30 | { |
| 31 | free(attr->raw_override_url); |
| 32 | free(attr->raw_override_path_url); |
| 33 | free(attr->raw_override_ctrl_url); |
| 34 | free(attr->raw_override_data_url); |
| 35 | if (attr->override_attr) { |
| 36 | free(attr->override_attr->path_url); |
| 37 | free(attr->override_attr->ctrl_url); |
| 38 | free(attr->override_attr->data_url); |
| 39 | free(attr->override_attr->session_name); |
| 40 | } |
| 41 | } |
| 42 | |
| 43 | void lttng_load_session_attr_destroy(struct lttng_load_session_attr *attr) |
| 44 | { |
| 45 | if (attr) { |
| 46 | reset_load_session_attr_urls(attr); |
| 47 | free(attr->override_attr); |
| 48 | free(attr); |
| 49 | } |
| 50 | } |
| 51 | |
| 52 | static int validate_attr(const struct lttng_load_session_attr *attr) |
| 53 | { |
| 54 | int ret = 0; |
| 55 | |
| 56 | if (!attr) { |
| 57 | ret = -LTTNG_ERR_INVALID; |
| 58 | goto end; |
| 59 | } |
| 60 | |
| 61 | if (!attr->override_attr) { |
| 62 | goto end; |
| 63 | } |
| 64 | |
| 65 | /* |
| 66 | * Refuse override name if the objective is to load multiple session |
| 67 | * since this operation is ambiguous while loading multiple session. |
| 68 | */ |
| 69 | if (attr->override_attr->session_name |
| 70 | && attr->session_name[0] == '\0') { |
| 71 | ret = -LTTNG_ERR_INVALID; |
| 72 | goto end; |
| 73 | } |
| 74 | end: |
| 75 | return ret; |
| 76 | } |
| 77 | |
| 78 | const char *lttng_load_session_attr_get_session_name( |
| 79 | struct lttng_load_session_attr *attr) |
| 80 | { |
| 81 | const char *ret = NULL; |
| 82 | |
| 83 | if (attr && attr->session_name[0]) { |
| 84 | ret = attr->session_name; |
| 85 | } |
| 86 | |
| 87 | return ret; |
| 88 | } |
| 89 | |
| 90 | const char *lttng_load_session_attr_get_input_url( |
| 91 | struct lttng_load_session_attr *attr) |
| 92 | { |
| 93 | const char *ret = NULL; |
| 94 | |
| 95 | if (attr && attr->input_url[0]) { |
| 96 | ret = attr->input_url; |
| 97 | } |
| 98 | |
| 99 | return ret; |
| 100 | } |
| 101 | |
| 102 | int lttng_load_session_attr_get_overwrite( |
| 103 | struct lttng_load_session_attr *attr) |
| 104 | { |
| 105 | return attr ? attr->overwrite : -LTTNG_ERR_INVALID; |
| 106 | } |
| 107 | |
| 108 | const char *lttng_load_session_attr_get_override_ctrl_url( |
| 109 | struct lttng_load_session_attr *attr) |
| 110 | { |
| 111 | const char *ret = NULL; |
| 112 | |
| 113 | if (!attr || !attr->override_attr) { |
| 114 | goto end; |
| 115 | } |
| 116 | |
| 117 | ret = attr->raw_override_ctrl_url; |
| 118 | end: |
| 119 | return ret; |
| 120 | } |
| 121 | |
| 122 | const char *lttng_load_session_attr_get_override_data_url( |
| 123 | struct lttng_load_session_attr *attr) |
| 124 | { |
| 125 | const char *ret = NULL; |
| 126 | |
| 127 | if (!attr || !attr->override_attr) { |
| 128 | goto end; |
| 129 | } |
| 130 | |
| 131 | ret = attr->raw_override_data_url; |
| 132 | end: |
| 133 | return ret; |
| 134 | } |
| 135 | |
| 136 | const char *lttng_load_session_attr_get_override_url( |
| 137 | struct lttng_load_session_attr *attr) |
| 138 | { |
| 139 | const char *ret = NULL; |
| 140 | |
| 141 | if (!attr || !attr->override_attr) { |
| 142 | goto end; |
| 143 | } |
| 144 | |
| 145 | if ((attr->override_attr->path_url || |
| 146 | (attr->override_attr->ctrl_url && |
| 147 | attr->override_attr->data_url))) { |
| 148 | ret = attr->raw_override_url; |
| 149 | } |
| 150 | end: |
| 151 | return ret; |
| 152 | } |
| 153 | |
| 154 | const char *lttng_load_session_attr_get_override_session_name( |
| 155 | struct lttng_load_session_attr *attr) |
| 156 | { |
| 157 | const char *ret = NULL; |
| 158 | |
| 159 | if (!attr || !attr->override_attr) { |
| 160 | goto end; |
| 161 | } |
| 162 | |
| 163 | ret = attr->override_attr->session_name; |
| 164 | end: |
| 165 | return ret; |
| 166 | } |
| 167 | |
| 168 | int lttng_load_session_attr_set_session_name( |
| 169 | struct lttng_load_session_attr *attr, const char *session_name) |
| 170 | { |
| 171 | int ret = 0; |
| 172 | |
| 173 | if (!attr) { |
| 174 | ret = -LTTNG_ERR_INVALID; |
| 175 | goto error; |
| 176 | } |
| 177 | |
| 178 | if (session_name) { |
| 179 | size_t len; |
| 180 | |
| 181 | len = strlen(session_name); |
| 182 | if (len >= LTTNG_NAME_MAX) { |
| 183 | ret = -LTTNG_ERR_INVALID; |
| 184 | goto error; |
| 185 | } |
| 186 | |
| 187 | ret = lttng_strncpy(attr->session_name, session_name, |
| 188 | sizeof(attr->session_name)); |
| 189 | if (ret) { |
| 190 | ret = -LTTNG_ERR_INVALID; |
| 191 | goto error; |
| 192 | } |
| 193 | } else { |
| 194 | attr->session_name[0] = '\0'; |
| 195 | } |
| 196 | error: |
| 197 | return ret; |
| 198 | } |
| 199 | |
| 200 | int lttng_load_session_attr_set_input_url( |
| 201 | struct lttng_load_session_attr *attr, const char *url) |
| 202 | { |
| 203 | int ret = 0; |
| 204 | size_t len; |
| 205 | ssize_t size; |
| 206 | struct lttng_uri *uris = NULL; |
| 207 | |
| 208 | if (!attr) { |
| 209 | ret = -LTTNG_ERR_INVALID; |
| 210 | goto error; |
| 211 | } |
| 212 | |
| 213 | if (!url) { |
| 214 | attr->input_url[0] = '\0'; |
| 215 | ret = 0; |
| 216 | goto end; |
| 217 | } |
| 218 | |
| 219 | len = strlen(url); |
| 220 | if (len >= PATH_MAX) { |
| 221 | ret = -LTTNG_ERR_INVALID; |
| 222 | goto error; |
| 223 | } |
| 224 | |
| 225 | size = uri_parse_str_urls(url, NULL, &uris); |
| 226 | if (size <= 0 || uris[0].dtype != LTTNG_DST_PATH) { |
| 227 | ret = -LTTNG_ERR_INVALID; |
| 228 | goto error; |
| 229 | } |
| 230 | |
| 231 | /* Copy string plus the NULL terminated byte. */ |
| 232 | ret = lttng_strncpy(attr->input_url, uris[0].dst.path, |
| 233 | sizeof(attr->input_url)); |
| 234 | if (ret) { |
| 235 | ret = -LTTNG_ERR_INVALID; |
| 236 | goto error; |
| 237 | } |
| 238 | |
| 239 | end: |
| 240 | error: |
| 241 | free(uris); |
| 242 | return ret; |
| 243 | } |
| 244 | |
| 245 | int lttng_load_session_attr_set_overwrite( |
| 246 | struct lttng_load_session_attr *attr, int overwrite) |
| 247 | { |
| 248 | int ret = 0; |
| 249 | |
| 250 | if (!attr) { |
| 251 | ret = -LTTNG_ERR_INVALID; |
| 252 | goto end; |
| 253 | } |
| 254 | |
| 255 | attr->overwrite = !!overwrite; |
| 256 | end: |
| 257 | return ret; |
| 258 | } |
| 259 | |
| 260 | int lttng_load_session_attr_set_override_ctrl_url( |
| 261 | struct lttng_load_session_attr *attr, const char *url) |
| 262 | { |
| 263 | int ret = 0; |
| 264 | ssize_t ret_size; |
| 265 | struct lttng_uri *uri = NULL; |
| 266 | char *url_str = NULL; |
| 267 | char *raw_str = NULL; |
| 268 | |
| 269 | if (!attr) { |
| 270 | ret = -LTTNG_ERR_INVALID; |
| 271 | goto end; |
| 272 | } |
| 273 | |
| 274 | if (!attr->override_attr) { |
| 275 | attr->override_attr = zmalloc<config_load_session_override_attr>(); |
| 276 | if (!attr->override_attr) { |
| 277 | ret = -LTTNG_ERR_NOMEM; |
| 278 | goto end; |
| 279 | } |
| 280 | } |
| 281 | |
| 282 | if (attr->override_attr->path_url) { |
| 283 | /* |
| 284 | * Setting a ctrl override after a path override makes no sense. |
| 285 | */ |
| 286 | ret = -LTTNG_ERR_INVALID; |
| 287 | goto end; |
| 288 | } |
| 289 | |
| 290 | /* |
| 291 | * FIXME: uri_parse should be able to take as parameter the protocol |
| 292 | * type to validate "url". For now only check the parsing goes through; |
| 293 | * it will fail later on. |
| 294 | */ |
| 295 | ret_size = uri_parse(url, &uri); |
| 296 | if (ret_size < 0) { |
| 297 | ret = -LTTNG_ERR_INVALID; |
| 298 | goto end; |
| 299 | } |
| 300 | |
| 301 | if (uri[0].port == 0) { |
| 302 | uri[0].port = DEFAULT_NETWORK_CONTROL_PORT; |
| 303 | } |
| 304 | |
| 305 | url_str = calloc<char>(PATH_MAX); |
| 306 | if (!url_str) { |
| 307 | /* FIXME: return valid error */ |
| 308 | ret = -LTTNG_ERR_NOMEM; |
| 309 | goto end; |
| 310 | } |
| 311 | |
| 312 | ret = uri_to_str_url(&uri[0], url_str, PATH_MAX); |
| 313 | if (ret < 0) { |
| 314 | ret = -LTTNG_ERR_INVALID; |
| 315 | goto end; |
| 316 | } |
| 317 | ret = 0; |
| 318 | |
| 319 | raw_str = lttng_strndup(url, PATH_MAX); |
| 320 | if (!raw_str) { |
| 321 | ret = -LTTNG_ERR_NOMEM; |
| 322 | goto end; |
| 323 | } |
| 324 | |
| 325 | /* Squash old value if any */ |
| 326 | free(attr->override_attr->ctrl_url); |
| 327 | free(attr->raw_override_ctrl_url); |
| 328 | |
| 329 | /* Populate the object */ |
| 330 | attr->override_attr->ctrl_url = url_str; |
| 331 | attr->raw_override_ctrl_url = raw_str; |
| 332 | |
| 333 | /* Ownership passed to attr. */ |
| 334 | url_str = NULL; |
| 335 | raw_str = NULL; |
| 336 | |
| 337 | end: |
| 338 | free(raw_str); |
| 339 | free(url_str); |
| 340 | free(uri); |
| 341 | return ret; |
| 342 | } |
| 343 | |
| 344 | int lttng_load_session_attr_set_override_data_url( |
| 345 | struct lttng_load_session_attr *attr, const char *url) |
| 346 | { |
| 347 | int ret = 0; |
| 348 | ssize_t ret_size; |
| 349 | struct lttng_uri *uri = NULL; |
| 350 | char *url_str = NULL; |
| 351 | char *raw_str = NULL; |
| 352 | |
| 353 | if (!attr) { |
| 354 | ret = -LTTNG_ERR_INVALID; |
| 355 | goto end; |
| 356 | } |
| 357 | |
| 358 | if (!attr->override_attr) { |
| 359 | attr->override_attr = zmalloc<config_load_session_override_attr>(); |
| 360 | if (!attr->override_attr) { |
| 361 | ret = -LTTNG_ERR_NOMEM; |
| 362 | goto end; |
| 363 | } |
| 364 | } |
| 365 | |
| 366 | if (attr->override_attr->path_url) { |
| 367 | /* |
| 368 | * Setting a data override after a path override makes no sense. |
| 369 | */ |
| 370 | ret = -LTTNG_ERR_INVALID; |
| 371 | goto end; |
| 372 | } |
| 373 | |
| 374 | /* |
| 375 | * FIXME: uri_parse should be able to take as parameter the protocol |
| 376 | * type to validate "url". For now only check the parsing goes through; |
| 377 | * it will fail later on. |
| 378 | */ |
| 379 | ret_size = uri_parse(url, &uri); |
| 380 | if (ret_size < 0) { |
| 381 | ret = -LTTNG_ERR_INVALID; |
| 382 | goto end; |
| 383 | } |
| 384 | |
| 385 | if (uri[0].port == 0) { |
| 386 | uri[0].port = DEFAULT_NETWORK_DATA_PORT; |
| 387 | } |
| 388 | |
| 389 | url_str = calloc<char>(PATH_MAX); |
| 390 | if (!url_str) { |
| 391 | ret = -LTTNG_ERR_NOMEM; |
| 392 | goto end; |
| 393 | } |
| 394 | |
| 395 | ret = uri_to_str_url(&uri[0], url_str, PATH_MAX); |
| 396 | if (ret < 0) { |
| 397 | ret = -LTTNG_ERR_INVALID; |
| 398 | goto end; |
| 399 | } |
| 400 | ret = 0; |
| 401 | |
| 402 | raw_str = lttng_strndup(url, PATH_MAX); |
| 403 | if (!raw_str) { |
| 404 | ret = -LTTNG_ERR_NOMEM; |
| 405 | goto end; |
| 406 | } |
| 407 | |
| 408 | /* Squash old value if any */ |
| 409 | free(attr->override_attr->data_url); |
| 410 | free(attr->raw_override_data_url); |
| 411 | |
| 412 | /* Populate the object */ |
| 413 | attr->override_attr->data_url = url_str; |
| 414 | attr->raw_override_data_url = raw_str; |
| 415 | |
| 416 | /* Ownership passed to attr. */ |
| 417 | url_str = NULL; |
| 418 | raw_str = NULL; |
| 419 | end: |
| 420 | free(raw_str); |
| 421 | free(url_str); |
| 422 | free(uri); |
| 423 | return ret; |
| 424 | } |
| 425 | |
| 426 | int lttng_load_session_attr_set_override_url( |
| 427 | struct lttng_load_session_attr *attr, const char *url) |
| 428 | { |
| 429 | int ret = 0; |
| 430 | ssize_t ret_size; |
| 431 | struct lttng_uri *uri = NULL; |
| 432 | char *raw_url_str = NULL; |
| 433 | char *raw_path_str = NULL; |
| 434 | char *path_str = NULL; |
| 435 | char *raw_ctrl_str = NULL; |
| 436 | char *ctrl_str = NULL; |
| 437 | char *raw_data_str = NULL; |
| 438 | char *data_str = NULL; |
| 439 | char buffer[PATH_MAX]; |
| 440 | |
| 441 | if (!attr || !url || strlen(url) >= PATH_MAX) { |
| 442 | ret = -LTTNG_ERR_INVALID; |
| 443 | goto end; |
| 444 | } |
| 445 | |
| 446 | if (!attr->override_attr) { |
| 447 | attr->override_attr = zmalloc<config_load_session_override_attr>(); |
| 448 | if (!attr->override_attr) { |
| 449 | ret = -LTTNG_ERR_NOMEM; |
| 450 | goto end; |
| 451 | } |
| 452 | } |
| 453 | |
| 454 | /* |
| 455 | * FIXME: uri_parse should be able to take as parameter the protocol |
| 456 | * type to validate "url". For now only check the parsing goes through; |
| 457 | * it will fail later on. |
| 458 | */ |
| 459 | ret_size = uri_parse_str_urls(url, NULL, &uri); |
| 460 | if (ret_size < 0 || ret_size > 2) { |
| 461 | /* Unexpected URL format. */ |
| 462 | ret = -LTTNG_ERR_INVALID; |
| 463 | goto end; |
| 464 | } |
| 465 | |
| 466 | raw_url_str = lttng_strndup(url, PATH_MAX); |
| 467 | if (!raw_url_str) { |
| 468 | ret = -LTTNG_ERR_NOMEM; |
| 469 | goto end; |
| 470 | } |
| 471 | |
| 472 | /* Get path | ctrl && data string URL. */ |
| 473 | ret = uri_to_str_url(&uri[0], buffer, sizeof(buffer)); |
| 474 | if (ret < 0 || ret >= PATH_MAX) { |
| 475 | ret = -LTTNG_ERR_INVALID; |
| 476 | goto end; |
| 477 | } |
| 478 | ret = 0; |
| 479 | |
| 480 | switch (uri[0].dtype) { |
| 481 | case LTTNG_DST_PATH: |
| 482 | raw_path_str = lttng_strndup(buffer, PATH_MAX); |
| 483 | if (!raw_path_str) { |
| 484 | ret = -LTTNG_ERR_NOMEM; |
| 485 | goto end; |
| 486 | } |
| 487 | |
| 488 | path_str = lttng_strndup(raw_path_str, PATH_MAX); |
| 489 | if (!path_str) { |
| 490 | ret = -LTTNG_ERR_NOMEM; |
| 491 | goto end; |
| 492 | } |
| 493 | break; |
| 494 | case LTTNG_DST_IPV4: |
| 495 | case LTTNG_DST_IPV6: |
| 496 | if (ret_size != 2) { |
| 497 | ret = -LTTNG_ERR_INVALID; |
| 498 | goto end; |
| 499 | } |
| 500 | |
| 501 | raw_ctrl_str = lttng_strndup(buffer, PATH_MAX); |
| 502 | if (!raw_ctrl_str) { |
| 503 | ret = -LTTNG_ERR_NOMEM; |
| 504 | goto end; |
| 505 | } |
| 506 | |
| 507 | ctrl_str = lttng_strndup(raw_ctrl_str, PATH_MAX); |
| 508 | if (!ctrl_str) { |
| 509 | ret = -LTTNG_ERR_NOMEM; |
| 510 | goto end; |
| 511 | } |
| 512 | |
| 513 | /* Get the data uri. */ |
| 514 | ret = uri_to_str_url(&uri[1], buffer, sizeof(buffer)); |
| 515 | if (ret < 0) { |
| 516 | ret = -LTTNG_ERR_INVALID; |
| 517 | goto end; |
| 518 | } |
| 519 | ret = 0; |
| 520 | |
| 521 | raw_data_str = lttng_strndup(buffer, PATH_MAX); |
| 522 | if (!raw_data_str) { |
| 523 | ret = -LTTNG_ERR_NOMEM; |
| 524 | goto end; |
| 525 | } |
| 526 | |
| 527 | data_str = lttng_strndup(raw_data_str, PATH_MAX); |
| 528 | if (!data_str) { |
| 529 | ret = -LTTNG_ERR_NOMEM; |
| 530 | goto end; |
| 531 | } |
| 532 | |
| 533 | break; |
| 534 | default: |
| 535 | ret = -LTTNG_ERR_INVALID; |
| 536 | goto end; |
| 537 | } |
| 538 | |
| 539 | reset_load_session_attr_urls(attr); |
| 540 | |
| 541 | attr->override_attr->path_url = path_str; |
| 542 | attr->override_attr->ctrl_url = ctrl_str; |
| 543 | attr->override_attr->data_url = data_str; |
| 544 | |
| 545 | attr->raw_override_url = raw_url_str; |
| 546 | attr->raw_override_path_url = raw_path_str; |
| 547 | attr->raw_override_ctrl_url = raw_ctrl_str; |
| 548 | attr->raw_override_data_url = raw_data_str; |
| 549 | |
| 550 | /* Pass data ownership to attr. */ |
| 551 | raw_url_str = NULL; |
| 552 | raw_path_str = NULL; |
| 553 | path_str = NULL; |
| 554 | raw_ctrl_str = NULL; |
| 555 | ctrl_str = NULL; |
| 556 | raw_data_str = NULL; |
| 557 | data_str = NULL; |
| 558 | |
| 559 | end: |
| 560 | free(raw_path_str); |
| 561 | free(path_str); |
| 562 | free(raw_ctrl_str); |
| 563 | free(ctrl_str); |
| 564 | free(raw_data_str); |
| 565 | free(data_str); |
| 566 | free(raw_url_str); |
| 567 | free(uri); |
| 568 | return ret; |
| 569 | } |
| 570 | |
| 571 | int lttng_load_session_attr_set_override_session_name( |
| 572 | struct lttng_load_session_attr *attr, const char *session_name) |
| 573 | { |
| 574 | int ret = 0; |
| 575 | size_t len; |
| 576 | |
| 577 | if (!attr ||!session_name) { |
| 578 | ret = -LTTNG_ERR_INVALID; |
| 579 | goto end; |
| 580 | } |
| 581 | |
| 582 | if (!attr->override_attr) { |
| 583 | attr->override_attr = zmalloc<config_load_session_override_attr>(); |
| 584 | if (!attr->override_attr) { |
| 585 | ret = -LTTNG_ERR_NOMEM; |
| 586 | goto end; |
| 587 | } |
| 588 | } |
| 589 | |
| 590 | len = strlen(session_name); |
| 591 | if (len >= LTTNG_NAME_MAX) { |
| 592 | ret = -LTTNG_ERR_INVALID; |
| 593 | goto end; |
| 594 | } |
| 595 | |
| 596 | attr->override_attr->session_name = lttng_strndup(session_name, |
| 597 | len); |
| 598 | if (!attr->override_attr->session_name) { |
| 599 | ret = -LTTNG_ERR_NOMEM; |
| 600 | goto end; |
| 601 | } |
| 602 | end: |
| 603 | return ret; |
| 604 | } |
| 605 | |
| 606 | int lttng_load_session(struct lttng_load_session_attr *attr) |
| 607 | { |
| 608 | int ret; |
| 609 | const char *url, *session_name; |
| 610 | |
| 611 | if (!attr) { |
| 612 | ret = -LTTNG_ERR_INVALID; |
| 613 | goto end; |
| 614 | } |
| 615 | |
| 616 | ret = validate_attr(attr); |
| 617 | if (ret) { |
| 618 | goto end; |
| 619 | } |
| 620 | |
| 621 | url = attr->input_url[0] != '\0' ? attr->input_url : NULL; |
| 622 | session_name = attr->session_name[0] != '\0' ? |
| 623 | attr->session_name : NULL; |
| 624 | |
| 625 | ret = config_load_session(url, session_name, attr->overwrite, 0, |
| 626 | attr->override_attr); |
| 627 | |
| 628 | end: |
| 629 | return ret; |
| 630 | } |