| 1 | /* |
| 2 | * Copyright (C) 2019 - Jérémie Galarneau <jeremie.galarneau@efficios.com> |
| 3 | * |
| 4 | * This library is free software; you can redistribute it and/or modify it |
| 5 | * under the terms of the GNU Lesser General Public License, version 2.1 only, |
| 6 | * as published by the Free Software Foundation. |
| 7 | * |
| 8 | * This library is distributed in the hope that it will be useful, but WITHOUT |
| 9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License |
| 11 | * for more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU Lesser General Public License |
| 14 | * along with this library; if not, write to the Free Software Foundation, |
| 15 | * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 16 | */ |
| 17 | |
| 18 | #include <lttng/session-descriptor-internal.h> |
| 19 | #include <common/macros.h> |
| 20 | #include <common/uri.h> |
| 21 | #include <common/defaults.h> |
| 22 | #include <common/error.h> |
| 23 | #include <time.h> |
| 24 | #include <assert.h> |
| 25 | #include <stdio.h> |
| 26 | |
| 27 | struct lttng_session_descriptor_network_location { |
| 28 | struct lttng_uri *control; |
| 29 | struct lttng_uri *data; |
| 30 | }; |
| 31 | |
| 32 | struct lttng_session_descriptor { |
| 33 | enum lttng_session_descriptor_type type; |
| 34 | /* |
| 35 | * If an output type that is not OUTPUT_TYPE_NONE is specified, |
| 36 | * it means that an output of that type must be generated at |
| 37 | * session-creation time. |
| 38 | */ |
| 39 | enum lttng_session_descriptor_output_type output_type; |
| 40 | char *name; |
| 41 | union { |
| 42 | struct lttng_session_descriptor_network_location network; |
| 43 | struct lttng_uri *local; |
| 44 | } output; |
| 45 | }; |
| 46 | |
| 47 | struct lttng_session_descriptor_snapshot { |
| 48 | struct lttng_session_descriptor base; |
| 49 | /* |
| 50 | * Assumes at-most one snapshot output is supported. Uses |
| 51 | * the output field of the base class. |
| 52 | */ |
| 53 | }; |
| 54 | |
| 55 | struct lttng_session_descriptor_live { |
| 56 | struct lttng_session_descriptor base; |
| 57 | unsigned long long live_timer_us; |
| 58 | }; |
| 59 | |
| 60 | struct lttng_session_descriptor_comm { |
| 61 | /* enum lttng_session_descriptor_type */ |
| 62 | uint8_t type; |
| 63 | /* enum lttng_session_descriptor_output_type */ |
| 64 | uint8_t output_type; |
| 65 | /* Includes trailing null. */ |
| 66 | uint32_t name_len; |
| 67 | /* Name follows, followed by URIs */ |
| 68 | uint8_t uri_count; |
| 69 | } LTTNG_PACKED; |
| 70 | |
| 71 | struct lttng_session_descriptor_live_comm { |
| 72 | struct lttng_session_descriptor_comm base; |
| 73 | /* Live-specific parameters. */ |
| 74 | uint64_t live_timer_us; |
| 75 | } LTTNG_PACKED; |
| 76 | |
| 77 | static |
| 78 | struct lttng_uri *uri_copy(const struct lttng_uri *uri) |
| 79 | { |
| 80 | struct lttng_uri *new_uri = NULL; |
| 81 | |
| 82 | if (!uri) { |
| 83 | goto end; |
| 84 | } |
| 85 | |
| 86 | new_uri = zmalloc(sizeof(*new_uri)); |
| 87 | if (!new_uri) { |
| 88 | goto end; |
| 89 | } |
| 90 | memcpy(new_uri, uri, sizeof(*new_uri)); |
| 91 | end: |
| 92 | return new_uri; |
| 93 | } |
| 94 | |
| 95 | static |
| 96 | struct lttng_uri *uri_from_path(const char *path) |
| 97 | { |
| 98 | struct lttng_uri *uris = NULL; |
| 99 | ssize_t uri_count; |
| 100 | char local_protocol_string[LTTNG_PATH_MAX + sizeof("file://")] = |
| 101 | "file://"; |
| 102 | |
| 103 | if (strlen(path) >= LTTNG_PATH_MAX) { |
| 104 | goto end; |
| 105 | } |
| 106 | |
| 107 | if (path[0] != '/') { |
| 108 | /* Not an absolute path. */ |
| 109 | goto end; |
| 110 | } |
| 111 | |
| 112 | strncat(local_protocol_string, path, LTTNG_PATH_MAX); |
| 113 | uri_count = uri_parse(local_protocol_string, &uris); |
| 114 | if (uri_count != 1) { |
| 115 | goto error; |
| 116 | } |
| 117 | if (uris[0].dtype != LTTNG_DST_PATH) { |
| 118 | goto error; |
| 119 | } |
| 120 | |
| 121 | end: |
| 122 | return uris; |
| 123 | error: |
| 124 | free(uris); |
| 125 | return NULL; |
| 126 | } |
| 127 | |
| 128 | static |
| 129 | void network_location_fini( |
| 130 | struct lttng_session_descriptor_network_location *location) |
| 131 | { |
| 132 | free(location->control); |
| 133 | free(location->data); |
| 134 | } |
| 135 | |
| 136 | /* Assumes ownership of control and data. */ |
| 137 | static |
| 138 | int network_location_set_from_lttng_uris( |
| 139 | struct lttng_session_descriptor_network_location *location, |
| 140 | struct lttng_uri *control, struct lttng_uri *data) |
| 141 | { |
| 142 | int ret = 0; |
| 143 | |
| 144 | if (!control && !data) { |
| 145 | goto end; |
| 146 | } |
| 147 | |
| 148 | if (!(control && data)) { |
| 149 | /* None or both must be set. */ |
| 150 | ret = -1; |
| 151 | goto end; |
| 152 | } |
| 153 | |
| 154 | if (control->stype != LTTNG_STREAM_CONTROL || |
| 155 | data->stype != LTTNG_STREAM_DATA) { |
| 156 | ret = -1; |
| 157 | goto end; |
| 158 | } |
| 159 | |
| 160 | free(location->control); |
| 161 | free(location->data); |
| 162 | location->control = control; |
| 163 | location->data = data; |
| 164 | control = NULL; |
| 165 | data = NULL; |
| 166 | end: |
| 167 | free(control); |
| 168 | free(data); |
| 169 | return ret; |
| 170 | } |
| 171 | |
| 172 | static |
| 173 | int network_location_set_from_uri_strings( |
| 174 | struct lttng_session_descriptor_network_location *location, |
| 175 | const char *control, const char *data) |
| 176 | { |
| 177 | int ret = 0; |
| 178 | ssize_t uri_count; |
| 179 | struct lttng_uri *parsed_uris = NULL; |
| 180 | struct lttng_uri *control_uri = NULL; |
| 181 | struct lttng_uri *data_uri = NULL; |
| 182 | |
| 183 | uri_count = uri_parse_str_urls(control, data, &parsed_uris); |
| 184 | if (uri_count != 2 && uri_count != 0) { |
| 185 | ret = -1; |
| 186 | goto end; |
| 187 | } |
| 188 | |
| 189 | /* |
| 190 | * uri_parse_str_urls returns a contiguous array of lttng_uris whereas |
| 191 | * session descriptors expect individually allocated lttng_uris. |
| 192 | */ |
| 193 | if (uri_count == 2) { |
| 194 | control_uri = zmalloc(sizeof(*control_uri)); |
| 195 | data_uri = zmalloc(sizeof(*data_uri)); |
| 196 | if (!control_uri || !data_uri) { |
| 197 | ret = -1; |
| 198 | goto end; |
| 199 | } |
| 200 | memcpy(control_uri, &parsed_uris[0], sizeof(*control_uri)); |
| 201 | memcpy(data_uri, &parsed_uris[1], sizeof(*data_uri)); |
| 202 | } |
| 203 | |
| 204 | /* Ownership of control and data uris is transferred. */ |
| 205 | ret = network_location_set_from_lttng_uris( |
| 206 | location, |
| 207 | control_uri, |
| 208 | data_uri); |
| 209 | control_uri = NULL; |
| 210 | data_uri = NULL; |
| 211 | end: |
| 212 | free(parsed_uris); |
| 213 | free(control_uri); |
| 214 | free(data_uri); |
| 215 | return ret; |
| 216 | } |
| 217 | |
| 218 | struct lttng_session_descriptor * |
| 219 | lttng_session_descriptor_create(const char *name) |
| 220 | { |
| 221 | struct lttng_session_descriptor *descriptor; |
| 222 | |
| 223 | descriptor = zmalloc(sizeof(*descriptor)); |
| 224 | if (!descriptor) { |
| 225 | goto error; |
| 226 | } |
| 227 | |
| 228 | descriptor->type = LTTNG_SESSION_DESCRIPTOR_TYPE_REGULAR; |
| 229 | descriptor->output_type = |
| 230 | LTTNG_SESSION_DESCRIPTOR_OUTPUT_TYPE_NONE; |
| 231 | if (lttng_session_descriptor_set_session_name(descriptor, name)) { |
| 232 | goto error; |
| 233 | } |
| 234 | return descriptor; |
| 235 | error: |
| 236 | lttng_session_descriptor_destroy(descriptor); |
| 237 | return NULL; |
| 238 | } |
| 239 | |
| 240 | /* Ownership of uri is transferred. */ |
| 241 | static |
| 242 | struct lttng_session_descriptor * |
| 243 | _lttng_session_descriptor_local_create(const char *name, |
| 244 | struct lttng_uri *uri) |
| 245 | { |
| 246 | struct lttng_session_descriptor *descriptor; |
| 247 | |
| 248 | descriptor = lttng_session_descriptor_create(name); |
| 249 | if (!descriptor) { |
| 250 | goto error; |
| 251 | } |
| 252 | descriptor->type = LTTNG_SESSION_DESCRIPTOR_TYPE_REGULAR; |
| 253 | descriptor->output_type = |
| 254 | LTTNG_SESSION_DESCRIPTOR_OUTPUT_TYPE_LOCAL; |
| 255 | if (uri) { |
| 256 | if (uri->dtype != LTTNG_DST_PATH) { |
| 257 | goto error; |
| 258 | } |
| 259 | descriptor->output.local = uri; |
| 260 | uri = NULL; |
| 261 | } |
| 262 | return descriptor; |
| 263 | error: |
| 264 | free(uri); |
| 265 | lttng_session_descriptor_destroy(descriptor); |
| 266 | return NULL; |
| 267 | } |
| 268 | |
| 269 | struct lttng_session_descriptor * |
| 270 | lttng_session_descriptor_local_create(const char *name, const char *path) |
| 271 | { |
| 272 | struct lttng_uri *uri = NULL; |
| 273 | struct lttng_session_descriptor *descriptor; |
| 274 | |
| 275 | if (path) { |
| 276 | uri = uri_from_path(path); |
| 277 | if (!uri) { |
| 278 | goto error; |
| 279 | } |
| 280 | } |
| 281 | descriptor = _lttng_session_descriptor_local_create(name, uri); |
| 282 | return descriptor; |
| 283 | error: |
| 284 | return NULL; |
| 285 | } |
| 286 | |
| 287 | /* Assumes the ownership of both uris. */ |
| 288 | static |
| 289 | struct lttng_session_descriptor * |
| 290 | _lttng_session_descriptor_network_create(const char *name, |
| 291 | struct lttng_uri *control, struct lttng_uri *data) |
| 292 | { |
| 293 | int ret; |
| 294 | struct lttng_session_descriptor *descriptor; |
| 295 | |
| 296 | descriptor = lttng_session_descriptor_create(name); |
| 297 | if (!descriptor) { |
| 298 | goto error; |
| 299 | } |
| 300 | |
| 301 | descriptor->type = LTTNG_SESSION_DESCRIPTOR_TYPE_REGULAR; |
| 302 | descriptor->output_type = LTTNG_SESSION_DESCRIPTOR_OUTPUT_TYPE_NETWORK; |
| 303 | /* Assumes the ownership of both uris. */ |
| 304 | ret = network_location_set_from_lttng_uris(&descriptor->output.network, |
| 305 | control, data); |
| 306 | control = NULL; |
| 307 | data = NULL; |
| 308 | if (ret) { |
| 309 | goto error; |
| 310 | } |
| 311 | return descriptor; |
| 312 | error: |
| 313 | lttng_session_descriptor_destroy(descriptor); |
| 314 | free(control); |
| 315 | free(data); |
| 316 | return NULL; |
| 317 | } |
| 318 | |
| 319 | struct lttng_session_descriptor * |
| 320 | lttng_session_descriptor_network_create(const char *name, |
| 321 | const char *control_url, const char *data_url) |
| 322 | { |
| 323 | int ret; |
| 324 | struct lttng_session_descriptor *descriptor; |
| 325 | |
| 326 | descriptor = _lttng_session_descriptor_network_create(name, |
| 327 | NULL, NULL); |
| 328 | if (!descriptor) { |
| 329 | goto error; |
| 330 | } |
| 331 | |
| 332 | ret = network_location_set_from_uri_strings(&descriptor->output.network, |
| 333 | control_url, data_url); |
| 334 | if (ret) { |
| 335 | goto error; |
| 336 | } |
| 337 | return descriptor; |
| 338 | error: |
| 339 | lttng_session_descriptor_destroy(descriptor); |
| 340 | return NULL; |
| 341 | } |
| 342 | |
| 343 | static |
| 344 | struct lttng_session_descriptor_snapshot * |
| 345 | _lttng_session_descriptor_snapshot_create(const char *name) |
| 346 | { |
| 347 | struct lttng_session_descriptor_snapshot *descriptor; |
| 348 | |
| 349 | descriptor = zmalloc(sizeof(*descriptor)); |
| 350 | if (!descriptor) { |
| 351 | goto error; |
| 352 | } |
| 353 | |
| 354 | descriptor->base.type = LTTNG_SESSION_DESCRIPTOR_TYPE_SNAPSHOT; |
| 355 | descriptor->base.output_type = |
| 356 | LTTNG_SESSION_DESCRIPTOR_OUTPUT_TYPE_NONE; |
| 357 | if (lttng_session_descriptor_set_session_name(&descriptor->base, |
| 358 | name)) { |
| 359 | goto error; |
| 360 | } |
| 361 | return descriptor; |
| 362 | error: |
| 363 | lttng_session_descriptor_destroy(descriptor ? &descriptor->base : NULL); |
| 364 | return NULL; |
| 365 | } |
| 366 | |
| 367 | /* Ownership of control and data is transferred. */ |
| 368 | static |
| 369 | struct lttng_session_descriptor_snapshot * |
| 370 | _lttng_session_descriptor_snapshot_network_create(const char *name, |
| 371 | struct lttng_uri *control, struct lttng_uri *data) |
| 372 | { |
| 373 | int ret; |
| 374 | struct lttng_session_descriptor_snapshot *descriptor; |
| 375 | |
| 376 | descriptor = _lttng_session_descriptor_snapshot_create(name); |
| 377 | if (!descriptor) { |
| 378 | goto error; |
| 379 | } |
| 380 | |
| 381 | descriptor->base.output_type = |
| 382 | LTTNG_SESSION_DESCRIPTOR_OUTPUT_TYPE_NETWORK; |
| 383 | /* Ownership of control and data is transferred. */ |
| 384 | ret = network_location_set_from_lttng_uris( |
| 385 | &descriptor->base.output.network, |
| 386 | control, data); |
| 387 | control = NULL; |
| 388 | data = NULL; |
| 389 | if (ret) { |
| 390 | goto error; |
| 391 | } |
| 392 | return descriptor; |
| 393 | error: |
| 394 | free(control); |
| 395 | free(data); |
| 396 | lttng_session_descriptor_destroy(descriptor ? &descriptor->base : NULL); |
| 397 | return NULL; |
| 398 | } |
| 399 | |
| 400 | struct lttng_session_descriptor * |
| 401 | lttng_session_descriptor_snapshot_create(const char *name) |
| 402 | { |
| 403 | struct lttng_session_descriptor_snapshot *descriptor; |
| 404 | |
| 405 | descriptor = _lttng_session_descriptor_snapshot_create(name); |
| 406 | return descriptor ? &descriptor->base : NULL; |
| 407 | } |
| 408 | |
| 409 | struct lttng_session_descriptor * |
| 410 | lttng_session_descriptor_snapshot_network_create(const char *name, |
| 411 | const char *control_url, const char *data_url) |
| 412 | { |
| 413 | int ret; |
| 414 | struct lttng_session_descriptor_snapshot *descriptor; |
| 415 | |
| 416 | descriptor = _lttng_session_descriptor_snapshot_network_create(name, |
| 417 | NULL, NULL); |
| 418 | if (!descriptor) { |
| 419 | goto error; |
| 420 | } |
| 421 | |
| 422 | ret = network_location_set_from_uri_strings( |
| 423 | &descriptor->base.output.network, |
| 424 | control_url, data_url); |
| 425 | if (ret) { |
| 426 | goto error; |
| 427 | } |
| 428 | return &descriptor->base; |
| 429 | error: |
| 430 | lttng_session_descriptor_destroy(descriptor ? &descriptor->base : NULL); |
| 431 | return NULL; |
| 432 | } |
| 433 | |
| 434 | /* Ownership of uri is transferred. */ |
| 435 | static |
| 436 | struct lttng_session_descriptor_snapshot * |
| 437 | _lttng_session_descriptor_snapshot_local_create(const char *name, |
| 438 | struct lttng_uri *uri) |
| 439 | { |
| 440 | struct lttng_session_descriptor_snapshot *descriptor; |
| 441 | |
| 442 | descriptor = _lttng_session_descriptor_snapshot_create(name); |
| 443 | if (!descriptor) { |
| 444 | goto error; |
| 445 | } |
| 446 | descriptor->base.output_type = |
| 447 | LTTNG_SESSION_DESCRIPTOR_OUTPUT_TYPE_LOCAL; |
| 448 | if (uri) { |
| 449 | if (uri->dtype != LTTNG_DST_PATH) { |
| 450 | goto error; |
| 451 | } |
| 452 | descriptor->base.output.local = uri; |
| 453 | uri = NULL; |
| 454 | } |
| 455 | return descriptor; |
| 456 | error: |
| 457 | free(uri); |
| 458 | lttng_session_descriptor_destroy(descriptor ? &descriptor->base : NULL); |
| 459 | return NULL; |
| 460 | } |
| 461 | |
| 462 | struct lttng_session_descriptor * |
| 463 | lttng_session_descriptor_snapshot_local_create(const char *name, |
| 464 | const char *path) |
| 465 | { |
| 466 | struct lttng_uri *path_uri = NULL; |
| 467 | struct lttng_session_descriptor_snapshot *descriptor; |
| 468 | |
| 469 | if (path) { |
| 470 | path_uri = uri_from_path(path); |
| 471 | if (!path_uri) { |
| 472 | goto error; |
| 473 | } |
| 474 | } |
| 475 | descriptor = _lttng_session_descriptor_snapshot_local_create(name, |
| 476 | path_uri); |
| 477 | return descriptor ? &descriptor->base : NULL; |
| 478 | error: |
| 479 | return NULL; |
| 480 | } |
| 481 | |
| 482 | static |
| 483 | struct lttng_session_descriptor_live * |
| 484 | _lttng_session_descriptor_live_create(const char *name, |
| 485 | unsigned long long live_timer_interval_us) |
| 486 | { |
| 487 | struct lttng_session_descriptor_live *descriptor = NULL; |
| 488 | |
| 489 | if (live_timer_interval_us == 0) { |
| 490 | goto error; |
| 491 | } |
| 492 | descriptor = zmalloc(sizeof(*descriptor)); |
| 493 | if (!descriptor) { |
| 494 | goto error; |
| 495 | } |
| 496 | |
| 497 | descriptor->base.type = LTTNG_SESSION_DESCRIPTOR_TYPE_LIVE; |
| 498 | descriptor->base.output_type = |
| 499 | LTTNG_SESSION_DESCRIPTOR_OUTPUT_TYPE_NONE; |
| 500 | descriptor->live_timer_us = live_timer_interval_us; |
| 501 | if (lttng_session_descriptor_set_session_name(&descriptor->base, |
| 502 | name)) { |
| 503 | goto error; |
| 504 | } |
| 505 | |
| 506 | return descriptor; |
| 507 | error: |
| 508 | lttng_session_descriptor_destroy(descriptor ? &descriptor->base : NULL); |
| 509 | return NULL; |
| 510 | } |
| 511 | |
| 512 | /* Ownership of control and data is transferred. */ |
| 513 | static |
| 514 | struct lttng_session_descriptor_live * |
| 515 | _lttng_session_descriptor_live_network_create( |
| 516 | const char *name, |
| 517 | struct lttng_uri *control, struct lttng_uri *data, |
| 518 | unsigned long long live_timer_interval_us) |
| 519 | { |
| 520 | int ret; |
| 521 | struct lttng_session_descriptor_live *descriptor; |
| 522 | |
| 523 | descriptor = _lttng_session_descriptor_live_create(name, |
| 524 | live_timer_interval_us); |
| 525 | if (!descriptor) { |
| 526 | goto error; |
| 527 | } |
| 528 | |
| 529 | descriptor->base.output_type = |
| 530 | LTTNG_SESSION_DESCRIPTOR_OUTPUT_TYPE_NETWORK; |
| 531 | |
| 532 | /* Ownerwhip of control and data is transferred. */ |
| 533 | ret = network_location_set_from_lttng_uris( |
| 534 | &descriptor->base.output.network, |
| 535 | control, data); |
| 536 | control = NULL; |
| 537 | data = NULL; |
| 538 | if (ret) { |
| 539 | goto error; |
| 540 | } |
| 541 | return descriptor; |
| 542 | error: |
| 543 | free(control); |
| 544 | free(data); |
| 545 | lttng_session_descriptor_destroy(descriptor ? &descriptor->base : NULL); |
| 546 | return NULL; |
| 547 | } |
| 548 | |
| 549 | struct lttng_session_descriptor * |
| 550 | lttng_session_descriptor_live_create( |
| 551 | const char *name, |
| 552 | unsigned long long live_timer_us) |
| 553 | { |
| 554 | struct lttng_session_descriptor_live *descriptor; |
| 555 | |
| 556 | descriptor = _lttng_session_descriptor_live_create(name, live_timer_us); |
| 557 | |
| 558 | return descriptor ? &descriptor->base : NULL; |
| 559 | } |
| 560 | |
| 561 | struct lttng_session_descriptor * |
| 562 | lttng_session_descriptor_live_network_create( |
| 563 | const char *name, |
| 564 | const char *control_url, const char *data_url, |
| 565 | unsigned long long live_timer_us) |
| 566 | { |
| 567 | int ret; |
| 568 | struct lttng_session_descriptor_live *descriptor; |
| 569 | |
| 570 | descriptor = _lttng_session_descriptor_live_network_create(name, |
| 571 | NULL, NULL, live_timer_us); |
| 572 | if (!descriptor) { |
| 573 | goto error; |
| 574 | } |
| 575 | |
| 576 | ret = network_location_set_from_uri_strings( |
| 577 | &descriptor->base.output.network, |
| 578 | control_url, data_url); |
| 579 | if (ret) { |
| 580 | goto error; |
| 581 | } |
| 582 | return &descriptor->base; |
| 583 | error: |
| 584 | lttng_session_descriptor_destroy(descriptor ? &descriptor->base : NULL); |
| 585 | return NULL; |
| 586 | } |
| 587 | |
| 588 | void lttng_session_descriptor_destroy( |
| 589 | struct lttng_session_descriptor *descriptor) |
| 590 | { |
| 591 | if (!descriptor) { |
| 592 | return; |
| 593 | } |
| 594 | |
| 595 | switch (descriptor->output_type) { |
| 596 | case LTTNG_SESSION_DESCRIPTOR_OUTPUT_TYPE_NONE: |
| 597 | break; |
| 598 | case LTTNG_SESSION_DESCRIPTOR_OUTPUT_TYPE_LOCAL: |
| 599 | free(descriptor->output.local); |
| 600 | break; |
| 601 | case LTTNG_SESSION_DESCRIPTOR_OUTPUT_TYPE_NETWORK: |
| 602 | network_location_fini(&descriptor->output.network); |
| 603 | break; |
| 604 | default: |
| 605 | abort(); |
| 606 | } |
| 607 | |
| 608 | free(descriptor->name); |
| 609 | free(descriptor); |
| 610 | } |
| 611 | |
| 612 | LTTNG_HIDDEN |
| 613 | ssize_t lttng_session_descriptor_create_from_buffer( |
| 614 | const struct lttng_buffer_view *payload, |
| 615 | struct lttng_session_descriptor **descriptor) |
| 616 | { |
| 617 | int i; |
| 618 | ssize_t offset = 0, ret; |
| 619 | struct lttng_buffer_view current_view; |
| 620 | const char *name = NULL; |
| 621 | const struct lttng_session_descriptor_comm *base_header; |
| 622 | size_t max_expected_uri_count; |
| 623 | uint64_t live_timer_us = 0; |
| 624 | struct lttng_uri *uris[2] = {}; |
| 625 | enum lttng_session_descriptor_type type; |
| 626 | enum lttng_session_descriptor_output_type output_type; |
| 627 | |
| 628 | current_view = lttng_buffer_view_from_view(payload, offset, |
| 629 | sizeof(*base_header)); |
| 630 | base_header = (typeof(base_header)) current_view.data; |
| 631 | if (!base_header) { |
| 632 | ret = -1; |
| 633 | goto end; |
| 634 | } |
| 635 | |
| 636 | switch (base_header->type) { |
| 637 | case LTTNG_SESSION_DESCRIPTOR_TYPE_REGULAR: |
| 638 | case LTTNG_SESSION_DESCRIPTOR_TYPE_SNAPSHOT: |
| 639 | break; |
| 640 | case LTTNG_SESSION_DESCRIPTOR_TYPE_LIVE: |
| 641 | { |
| 642 | const struct lttng_session_descriptor_live_comm *live_header; |
| 643 | |
| 644 | current_view = lttng_buffer_view_from_view(payload, offset, |
| 645 | sizeof(*live_header)); |
| 646 | live_header = (typeof(live_header)) current_view.data; |
| 647 | if (!live_header) { |
| 648 | ret = -1; |
| 649 | goto end; |
| 650 | } |
| 651 | |
| 652 | live_timer_us = live_header->live_timer_us; |
| 653 | break; |
| 654 | } |
| 655 | default: |
| 656 | ret = -1; |
| 657 | goto end; |
| 658 | } |
| 659 | /* type has been validated. */ |
| 660 | type = base_header->type; |
| 661 | |
| 662 | switch (base_header->output_type) { |
| 663 | case LTTNG_SESSION_DESCRIPTOR_OUTPUT_TYPE_NONE: |
| 664 | max_expected_uri_count = 0; |
| 665 | break; |
| 666 | case LTTNG_SESSION_DESCRIPTOR_OUTPUT_TYPE_LOCAL: |
| 667 | max_expected_uri_count = 1; |
| 668 | break; |
| 669 | case LTTNG_SESSION_DESCRIPTOR_OUTPUT_TYPE_NETWORK: |
| 670 | max_expected_uri_count = 2; |
| 671 | break; |
| 672 | default: |
| 673 | ret = -1; |
| 674 | goto end; |
| 675 | } |
| 676 | /* output_type has been validated. */ |
| 677 | output_type = base_header->output_type; |
| 678 | |
| 679 | /* Skip after header. */ |
| 680 | offset += current_view.size; |
| 681 | if (!base_header->name_len) { |
| 682 | goto skip_name; |
| 683 | } |
| 684 | |
| 685 | /* Map the name. */ |
| 686 | current_view = lttng_buffer_view_from_view(payload, offset, |
| 687 | base_header->name_len); |
| 688 | name = current_view.data; |
| 689 | if (!name) { |
| 690 | ret = -1; |
| 691 | goto end; |
| 692 | } |
| 693 | |
| 694 | if (base_header->name_len == 1 || |
| 695 | name[base_header->name_len - 1] || |
| 696 | strlen(name) != base_header->name_len - 1) { |
| 697 | /* |
| 698 | * Check that the name is not NULL, is NULL-terminated, and |
| 699 | * does not contain a NULL before the last byte. |
| 700 | */ |
| 701 | ret = -1; |
| 702 | goto end; |
| 703 | } |
| 704 | |
| 705 | /* Skip after the name. */ |
| 706 | offset += base_header->name_len; |
| 707 | skip_name: |
| 708 | if (base_header->uri_count > max_expected_uri_count) { |
| 709 | ret = -1; |
| 710 | goto end; |
| 711 | } |
| 712 | |
| 713 | for (i = 0; i < base_header->uri_count; i++) { |
| 714 | struct lttng_uri *uri; |
| 715 | |
| 716 | /* Map a URI. */ |
| 717 | current_view = lttng_buffer_view_from_view(payload, |
| 718 | offset, sizeof(*uri)); |
| 719 | uri = (typeof(uri)) current_view.data; |
| 720 | if (!uri) { |
| 721 | ret = -1; |
| 722 | goto end; |
| 723 | } |
| 724 | uris[i] = zmalloc(sizeof(*uri)); |
| 725 | if (!uris[i]) { |
| 726 | ret = -1; |
| 727 | goto end; |
| 728 | } |
| 729 | memcpy(uris[i], uri, sizeof(*uri)); |
| 730 | offset += sizeof(*uri); |
| 731 | } |
| 732 | |
| 733 | switch (type) { |
| 734 | case LTTNG_SESSION_DESCRIPTOR_TYPE_REGULAR: |
| 735 | switch (output_type) { |
| 736 | case LTTNG_SESSION_DESCRIPTOR_OUTPUT_TYPE_NONE: |
| 737 | *descriptor = lttng_session_descriptor_create(name); |
| 738 | break; |
| 739 | case LTTNG_SESSION_DESCRIPTOR_OUTPUT_TYPE_LOCAL: |
| 740 | *descriptor = _lttng_session_descriptor_local_create( |
| 741 | name, uris[0]); |
| 742 | break; |
| 743 | case LTTNG_SESSION_DESCRIPTOR_OUTPUT_TYPE_NETWORK: |
| 744 | *descriptor = _lttng_session_descriptor_network_create( |
| 745 | name, uris[0], uris[1]); |
| 746 | break; |
| 747 | default: |
| 748 | /* Already checked. */ |
| 749 | abort(); |
| 750 | } |
| 751 | break; |
| 752 | case LTTNG_SESSION_DESCRIPTOR_TYPE_SNAPSHOT: |
| 753 | { |
| 754 | struct lttng_session_descriptor_snapshot *snapshot; |
| 755 | switch (output_type) { |
| 756 | case LTTNG_SESSION_DESCRIPTOR_OUTPUT_TYPE_NONE: |
| 757 | snapshot = _lttng_session_descriptor_snapshot_create( |
| 758 | name); |
| 759 | break; |
| 760 | case LTTNG_SESSION_DESCRIPTOR_OUTPUT_TYPE_LOCAL: |
| 761 | snapshot = _lttng_session_descriptor_snapshot_local_create( |
| 762 | name, uris[0]); |
| 763 | break; |
| 764 | case LTTNG_SESSION_DESCRIPTOR_OUTPUT_TYPE_NETWORK: |
| 765 | snapshot = _lttng_session_descriptor_snapshot_network_create( |
| 766 | name, uris[0], uris[1]); |
| 767 | break; |
| 768 | default: |
| 769 | /* Already checked. */ |
| 770 | abort(); |
| 771 | } |
| 772 | *descriptor = snapshot ? &snapshot->base : NULL; |
| 773 | break; |
| 774 | } |
| 775 | case LTTNG_SESSION_DESCRIPTOR_TYPE_LIVE: |
| 776 | { |
| 777 | struct lttng_session_descriptor_live *live; |
| 778 | |
| 779 | switch (output_type) { |
| 780 | case LTTNG_SESSION_DESCRIPTOR_OUTPUT_TYPE_NONE: |
| 781 | live = _lttng_session_descriptor_live_create( |
| 782 | name, live_timer_us); |
| 783 | break; |
| 784 | case LTTNG_SESSION_DESCRIPTOR_OUTPUT_TYPE_NETWORK: |
| 785 | live = _lttng_session_descriptor_live_network_create( |
| 786 | name, uris[0], uris[1], |
| 787 | live_timer_us); |
| 788 | break; |
| 789 | case LTTNG_SESSION_DESCRIPTOR_OUTPUT_TYPE_LOCAL: |
| 790 | ret = -1; |
| 791 | goto end; |
| 792 | default: |
| 793 | /* Already checked. */ |
| 794 | abort(); |
| 795 | } |
| 796 | *descriptor = live ? &live->base : NULL; |
| 797 | break; |
| 798 | } |
| 799 | default: |
| 800 | /* Already checked. */ |
| 801 | abort(); |
| 802 | } |
| 803 | memset(uris, 0, sizeof(uris)); |
| 804 | if (!*descriptor) { |
| 805 | ret = -1; |
| 806 | goto end; |
| 807 | } |
| 808 | |
| 809 | ret = offset; |
| 810 | end: |
| 811 | free(uris[0]); |
| 812 | free(uris[1]); |
| 813 | return ret; |
| 814 | } |
| 815 | |
| 816 | LTTNG_HIDDEN |
| 817 | int lttng_session_descriptor_serialize( |
| 818 | const struct lttng_session_descriptor *descriptor, |
| 819 | struct lttng_dynamic_buffer *buffer) |
| 820 | { |
| 821 | int ret, i; |
| 822 | /* There are, at most, two URIs to serialize. */ |
| 823 | struct lttng_uri *uris[2] = {}; |
| 824 | size_t uri_count = 0; |
| 825 | /* The live header is a superset of all headers. */ |
| 826 | struct lttng_session_descriptor_live_comm header = { |
| 827 | .base.type = (uint8_t) descriptor->type, |
| 828 | .base.output_type = (uint8_t) descriptor->output_type, |
| 829 | .base.name_len = descriptor->name ? |
| 830 | strlen(descriptor->name) + 1 : 0, |
| 831 | }; |
| 832 | const void *header_ptr = NULL; |
| 833 | size_t header_size; |
| 834 | |
| 835 | switch (descriptor->output_type) { |
| 836 | case LTTNG_SESSION_DESCRIPTOR_OUTPUT_TYPE_NONE: |
| 837 | break; |
| 838 | case LTTNG_SESSION_DESCRIPTOR_OUTPUT_TYPE_LOCAL: |
| 839 | uris[0] = descriptor->output.local; |
| 840 | break; |
| 841 | case LTTNG_SESSION_DESCRIPTOR_OUTPUT_TYPE_NETWORK: |
| 842 | uris[0] = descriptor->output.network.control; |
| 843 | uris[1] = descriptor->output.network.data; |
| 844 | break; |
| 845 | default: |
| 846 | ret = -1; |
| 847 | goto end; |
| 848 | } |
| 849 | uri_count += !!uris[0]; |
| 850 | uri_count += !!uris[1]; |
| 851 | |
| 852 | header.base.uri_count = uri_count; |
| 853 | if (descriptor->type == LTTNG_SESSION_DESCRIPTOR_TYPE_LIVE) { |
| 854 | const struct lttng_session_descriptor_live *live = |
| 855 | container_of(descriptor, typeof(*live), |
| 856 | base); |
| 857 | |
| 858 | header.live_timer_us = live->live_timer_us; |
| 859 | header_ptr = &header; |
| 860 | header_size = sizeof(header); |
| 861 | } else { |
| 862 | header_ptr = &header.base; |
| 863 | header_size = sizeof(header.base); |
| 864 | } |
| 865 | |
| 866 | ret = lttng_dynamic_buffer_append(buffer, header_ptr, header_size); |
| 867 | if (ret) { |
| 868 | goto end; |
| 869 | } |
| 870 | if (header.base.name_len) { |
| 871 | ret = lttng_dynamic_buffer_append(buffer, descriptor->name, |
| 872 | header.base.name_len); |
| 873 | if (ret) { |
| 874 | goto end; |
| 875 | } |
| 876 | } |
| 877 | |
| 878 | for (i = 0; i < uri_count; i++) { |
| 879 | ret = lttng_dynamic_buffer_append(buffer, uris[i], |
| 880 | sizeof(struct lttng_uri)); |
| 881 | if (ret) { |
| 882 | goto end; |
| 883 | } |
| 884 | } |
| 885 | end: |
| 886 | return ret; |
| 887 | } |
| 888 | |
| 889 | LTTNG_HIDDEN |
| 890 | enum lttng_session_descriptor_type |
| 891 | lttng_session_descriptor_get_type( |
| 892 | const struct lttng_session_descriptor *descriptor) |
| 893 | { |
| 894 | return descriptor->type; |
| 895 | } |
| 896 | |
| 897 | LTTNG_HIDDEN |
| 898 | enum lttng_session_descriptor_output_type |
| 899 | lttng_session_descriptor_get_output_type( |
| 900 | const struct lttng_session_descriptor *descriptor) |
| 901 | { |
| 902 | return descriptor->output_type; |
| 903 | } |
| 904 | |
| 905 | LTTNG_HIDDEN |
| 906 | void lttng_session_descriptor_get_local_output_uri( |
| 907 | const struct lttng_session_descriptor *descriptor, |
| 908 | struct lttng_uri *local_uri) |
| 909 | { |
| 910 | memcpy(local_uri, descriptor->output.local, sizeof(*local_uri)); |
| 911 | } |
| 912 | |
| 913 | LTTNG_HIDDEN |
| 914 | void lttng_session_descriptor_get_network_output_uris( |
| 915 | const struct lttng_session_descriptor *descriptor, |
| 916 | struct lttng_uri *control, |
| 917 | struct lttng_uri *data) |
| 918 | { |
| 919 | memcpy(control, descriptor->output.network.control, sizeof(*control)); |
| 920 | memcpy(data, descriptor->output.network.data, sizeof(*data)); |
| 921 | } |
| 922 | |
| 923 | LTTNG_HIDDEN |
| 924 | unsigned long long |
| 925 | lttng_session_descriptor_live_get_timer_interval( |
| 926 | const struct lttng_session_descriptor *descriptor) |
| 927 | { |
| 928 | struct lttng_session_descriptor_live *live; |
| 929 | |
| 930 | live = container_of(descriptor, typeof(*live), base); |
| 931 | return live->live_timer_us; |
| 932 | } |
| 933 | |
| 934 | enum lttng_session_descriptor_status |
| 935 | lttng_session_descriptor_get_session_name( |
| 936 | const struct lttng_session_descriptor *descriptor, |
| 937 | const char **session_name) |
| 938 | { |
| 939 | enum lttng_session_descriptor_status status; |
| 940 | |
| 941 | if (!descriptor || !session_name) { |
| 942 | status = LTTNG_SESSION_DESCRIPTOR_STATUS_INVALID; |
| 943 | goto end; |
| 944 | } |
| 945 | |
| 946 | *session_name = descriptor->name; |
| 947 | status = descriptor->name ? |
| 948 | LTTNG_SESSION_DESCRIPTOR_STATUS_OK : |
| 949 | LTTNG_SESSION_DESCRIPTOR_STATUS_UNSET; |
| 950 | end: |
| 951 | return status; |
| 952 | } |
| 953 | |
| 954 | LTTNG_HIDDEN |
| 955 | int lttng_session_descriptor_set_session_name( |
| 956 | struct lttng_session_descriptor *descriptor, |
| 957 | const char *name) |
| 958 | { |
| 959 | int ret = 0; |
| 960 | char *new_name; |
| 961 | |
| 962 | if (!name) { |
| 963 | goto end; |
| 964 | } |
| 965 | if (strlen(name) >= LTTNG_NAME_MAX) { |
| 966 | ret = -1; |
| 967 | goto end; |
| 968 | } |
| 969 | new_name = strdup(name); |
| 970 | if (!new_name) { |
| 971 | ret = -1; |
| 972 | goto end; |
| 973 | } |
| 974 | free(descriptor->name); |
| 975 | descriptor->name = new_name; |
| 976 | end: |
| 977 | return ret; |
| 978 | } |
| 979 | |
| 980 | LTTNG_HIDDEN |
| 981 | bool lttng_session_descriptor_is_output_destination_initialized( |
| 982 | const struct lttng_session_descriptor *descriptor) |
| 983 | { |
| 984 | switch (descriptor->output_type) { |
| 985 | case LTTNG_SESSION_DESCRIPTOR_OUTPUT_TYPE_NONE: |
| 986 | return true; |
| 987 | case LTTNG_SESSION_DESCRIPTOR_OUTPUT_TYPE_LOCAL: |
| 988 | return descriptor->output.local; |
| 989 | case LTTNG_SESSION_DESCRIPTOR_OUTPUT_TYPE_NETWORK: |
| 990 | return descriptor->output.network.control; |
| 991 | default: |
| 992 | abort(); |
| 993 | } |
| 994 | } |
| 995 | |
| 996 | LTTNG_HIDDEN |
| 997 | bool lttng_session_descriptor_has_output_directory( |
| 998 | const struct lttng_session_descriptor *descriptor) |
| 999 | { |
| 1000 | switch (descriptor->output_type) { |
| 1001 | case LTTNG_SESSION_DESCRIPTOR_OUTPUT_TYPE_NONE: |
| 1002 | break; |
| 1003 | case LTTNG_SESSION_DESCRIPTOR_OUTPUT_TYPE_LOCAL: |
| 1004 | if (descriptor->output.local) { |
| 1005 | return *descriptor->output.local->dst.path; |
| 1006 | } |
| 1007 | break; |
| 1008 | case LTTNG_SESSION_DESCRIPTOR_OUTPUT_TYPE_NETWORK: |
| 1009 | if (descriptor->output.network.control) { |
| 1010 | return *descriptor->output.network.control->subdir; |
| 1011 | } |
| 1012 | break; |
| 1013 | default: |
| 1014 | abort(); |
| 1015 | } |
| 1016 | return false; |
| 1017 | } |
| 1018 | |
| 1019 | LTTNG_HIDDEN |
| 1020 | enum lttng_error_code lttng_session_descriptor_set_default_output( |
| 1021 | struct lttng_session_descriptor *descriptor, |
| 1022 | time_t *session_creation_time, |
| 1023 | const char *absolute_home_path) |
| 1024 | { |
| 1025 | enum lttng_error_code ret_code = LTTNG_OK; |
| 1026 | struct lttng_uri *uris = NULL; |
| 1027 | |
| 1028 | switch (descriptor->output_type) { |
| 1029 | case LTTNG_SESSION_DESCRIPTOR_OUTPUT_TYPE_NONE: |
| 1030 | goto end; |
| 1031 | case LTTNG_SESSION_DESCRIPTOR_OUTPUT_TYPE_LOCAL: |
| 1032 | { |
| 1033 | int ret; |
| 1034 | ssize_t uri_ret; |
| 1035 | char local_uri[LTTNG_PATH_MAX]; |
| 1036 | char creation_datetime_suffix[17] = {}; |
| 1037 | |
| 1038 | if (session_creation_time) { |
| 1039 | size_t strftime_ret; |
| 1040 | struct tm *timeinfo; |
| 1041 | |
| 1042 | timeinfo = localtime(session_creation_time); |
| 1043 | if (!timeinfo) { |
| 1044 | ret_code = LTTNG_ERR_FATAL; |
| 1045 | goto end; |
| 1046 | } |
| 1047 | strftime_ret = strftime(creation_datetime_suffix, |
| 1048 | sizeof(creation_datetime_suffix), |
| 1049 | "-%Y%m%d-%H%M%S", timeinfo); |
| 1050 | if (strftime_ret == 0) { |
| 1051 | ERR("Failed to format session creation timestamp while setting default local output destination"); |
| 1052 | ret_code = LTTNG_ERR_FATAL; |
| 1053 | goto end; |
| 1054 | } |
| 1055 | } |
| 1056 | assert(descriptor->name); |
| 1057 | ret = snprintf(local_uri, sizeof(local_uri), |
| 1058 | "file://%s/%s/%s%s", |
| 1059 | absolute_home_path, |
| 1060 | DEFAULT_TRACE_DIR_NAME, descriptor->name, |
| 1061 | creation_datetime_suffix); |
| 1062 | if (ret >= sizeof(local_uri)) { |
| 1063 | ERR("Truncation occurred while setting default local output destination"); |
| 1064 | ret_code = LTTNG_ERR_SET_URL; |
| 1065 | goto end; |
| 1066 | } else if (ret < 0) { |
| 1067 | PERROR("Failed to format default local output URI"); |
| 1068 | ret_code = LTTNG_ERR_SET_URL; |
| 1069 | goto end; |
| 1070 | } |
| 1071 | |
| 1072 | uri_ret = uri_parse(local_uri, &uris); |
| 1073 | if (uri_ret != 1) { |
| 1074 | ret_code = LTTNG_ERR_SET_URL; |
| 1075 | goto end; |
| 1076 | } |
| 1077 | free(descriptor->output.local); |
| 1078 | descriptor->output.local = &uris[0]; |
| 1079 | uris = NULL; |
| 1080 | break; |
| 1081 | } |
| 1082 | case LTTNG_SESSION_DESCRIPTOR_OUTPUT_TYPE_NETWORK: |
| 1083 | { |
| 1084 | int ret; |
| 1085 | ssize_t uri_ret; |
| 1086 | struct lttng_uri *control = NULL, *data = NULL; |
| 1087 | |
| 1088 | uri_ret = uri_parse_str_urls("net://127.0.0.1", NULL, &uris); |
| 1089 | if (uri_ret != 2) { |
| 1090 | ret_code = LTTNG_ERR_SET_URL; |
| 1091 | goto end; |
| 1092 | } |
| 1093 | |
| 1094 | control = uri_copy(&uris[0]); |
| 1095 | data = uri_copy(&uris[1]); |
| 1096 | if (!control || !data) { |
| 1097 | free(control); |
| 1098 | free(data); |
| 1099 | ret_code = LTTNG_ERR_SET_URL; |
| 1100 | goto end; |
| 1101 | } |
| 1102 | |
| 1103 | /* Ownership of uris is transferred. */ |
| 1104 | ret = network_location_set_from_lttng_uris( |
| 1105 | &descriptor->output.network, |
| 1106 | control, data); |
| 1107 | if (ret) { |
| 1108 | abort(); |
| 1109 | ret_code = LTTNG_ERR_SET_URL; |
| 1110 | goto end; |
| 1111 | } |
| 1112 | break; |
| 1113 | } |
| 1114 | default: |
| 1115 | abort(); |
| 1116 | } |
| 1117 | end: |
| 1118 | free(uris); |
| 1119 | return ret_code; |
| 1120 | } |
| 1121 | |
| 1122 | /* |
| 1123 | * Note that only properties that can be populated by the session daemon |
| 1124 | * (output destination and name) are assigned. |
| 1125 | */ |
| 1126 | LTTNG_HIDDEN |
| 1127 | int lttng_session_descriptor_assign( |
| 1128 | struct lttng_session_descriptor *dst, |
| 1129 | const struct lttng_session_descriptor *src) |
| 1130 | { |
| 1131 | int ret = 0; |
| 1132 | |
| 1133 | if (dst->type != src->type) { |
| 1134 | ret = -1; |
| 1135 | goto end; |
| 1136 | } |
| 1137 | if (dst->output_type != src->output_type) { |
| 1138 | ret = -1; |
| 1139 | goto end; |
| 1140 | } |
| 1141 | ret = lttng_session_descriptor_set_session_name(dst, src->name); |
| 1142 | if (ret) { |
| 1143 | goto end; |
| 1144 | } |
| 1145 | switch (dst->output_type) { |
| 1146 | case LTTNG_SESSION_DESCRIPTOR_OUTPUT_TYPE_LOCAL: |
| 1147 | free(dst->output.local); |
| 1148 | dst->output.local = uri_copy(src->output.local); |
| 1149 | if (!dst->output.local) { |
| 1150 | ret = -1; |
| 1151 | goto end; |
| 1152 | } |
| 1153 | break; |
| 1154 | case LTTNG_SESSION_DESCRIPTOR_OUTPUT_TYPE_NETWORK: |
| 1155 | { |
| 1156 | struct lttng_uri *control_copy = NULL, *data_copy = NULL; |
| 1157 | |
| 1158 | control_copy = uri_copy(dst->output.network.control); |
| 1159 | if (!control_copy && dst->output.network.control) { |
| 1160 | ret = -1; |
| 1161 | goto end; |
| 1162 | } |
| 1163 | data_copy = uri_copy(dst->output.network.data); |
| 1164 | if (!data_copy && dst->output.network.data) { |
| 1165 | free(control_copy); |
| 1166 | ret = -1; |
| 1167 | goto end; |
| 1168 | } |
| 1169 | ret = network_location_set_from_lttng_uris(&dst->output.network, |
| 1170 | control_copy, data_copy); |
| 1171 | break; |
| 1172 | } |
| 1173 | case LTTNG_SESSION_DESCRIPTOR_OUTPUT_TYPE_NONE: |
| 1174 | goto end; |
| 1175 | } |
| 1176 | end: |
| 1177 | return ret; |
| 1178 | } |