| 1 | /* |
| 2 | * Copyright (C) 2012 - David Goulet <dgoulet@efficios.com> |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify it |
| 5 | * under the terms of the GNU General Public License, version 2 only, as |
| 6 | * published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program 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 General Public License for |
| 11 | * more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public License along with |
| 14 | * this program; if not, write to the Free Software Foundation, Inc., 51 |
| 15 | * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| 16 | */ |
| 17 | |
| 18 | #define _GNU_SOURCE |
| 19 | #include <assert.h> |
| 20 | #include <stdio.h> |
| 21 | #include <stdlib.h> |
| 22 | #include <string.h> |
| 23 | #include <sys/stat.h> |
| 24 | #include <sys/types.h> |
| 25 | #include <unistd.h> |
| 26 | #include <inttypes.h> |
| 27 | |
| 28 | #include <common/common.h> |
| 29 | #include <common/defaults.h> |
| 30 | #include <common/uri.h> |
| 31 | #include <common/relayd/relayd.h> |
| 32 | |
| 33 | #include "consumer.h" |
| 34 | #include "health-sessiond.h" |
| 35 | #include "ust-app.h" |
| 36 | #include "utils.h" |
| 37 | |
| 38 | /* |
| 39 | * Send a data payload using a given consumer socket of size len. |
| 40 | * |
| 41 | * The consumer socket lock MUST be acquired before calling this since this |
| 42 | * function can change the fd value. |
| 43 | * |
| 44 | * Return 0 on success else a negative value on error. |
| 45 | */ |
| 46 | int consumer_socket_send(struct consumer_socket *socket, void *msg, size_t len) |
| 47 | { |
| 48 | int fd; |
| 49 | ssize_t size; |
| 50 | |
| 51 | assert(socket); |
| 52 | assert(socket->fd_ptr); |
| 53 | assert(msg); |
| 54 | |
| 55 | /* Consumer socket is invalid. Stopping. */ |
| 56 | fd = *socket->fd_ptr; |
| 57 | if (fd < 0) { |
| 58 | goto error; |
| 59 | } |
| 60 | |
| 61 | size = lttcomm_send_unix_sock(fd, msg, len); |
| 62 | if (size < 0) { |
| 63 | /* The above call will print a PERROR on error. */ |
| 64 | DBG("Error when sending data to consumer on sock %d", fd); |
| 65 | /* |
| 66 | * At this point, the socket is not usable anymore thus closing it and |
| 67 | * setting the file descriptor to -1 so it is not reused. |
| 68 | */ |
| 69 | |
| 70 | /* This call will PERROR on error. */ |
| 71 | (void) lttcomm_close_unix_sock(fd); |
| 72 | *socket->fd_ptr = -1; |
| 73 | goto error; |
| 74 | } |
| 75 | |
| 76 | return 0; |
| 77 | |
| 78 | error: |
| 79 | return -1; |
| 80 | } |
| 81 | |
| 82 | /* |
| 83 | * Receive a data payload using a given consumer socket of size len. |
| 84 | * |
| 85 | * The consumer socket lock MUST be acquired before calling this since this |
| 86 | * function can change the fd value. |
| 87 | * |
| 88 | * Return 0 on success else a negative value on error. |
| 89 | */ |
| 90 | int consumer_socket_recv(struct consumer_socket *socket, void *msg, size_t len) |
| 91 | { |
| 92 | int fd; |
| 93 | ssize_t size; |
| 94 | |
| 95 | assert(socket); |
| 96 | assert(socket->fd_ptr); |
| 97 | assert(msg); |
| 98 | |
| 99 | /* Consumer socket is invalid. Stopping. */ |
| 100 | fd = *socket->fd_ptr; |
| 101 | if (fd < 0) { |
| 102 | goto error; |
| 103 | } |
| 104 | |
| 105 | size = lttcomm_recv_unix_sock(fd, msg, len); |
| 106 | if (size <= 0) { |
| 107 | /* The above call will print a PERROR on error. */ |
| 108 | DBG("Error when receiving data from the consumer socket %d", fd); |
| 109 | /* |
| 110 | * At this point, the socket is not usable anymore thus closing it and |
| 111 | * setting the file descriptor to -1 so it is not reused. |
| 112 | */ |
| 113 | |
| 114 | /* This call will PERROR on error. */ |
| 115 | (void) lttcomm_close_unix_sock(fd); |
| 116 | *socket->fd_ptr = -1; |
| 117 | goto error; |
| 118 | } |
| 119 | |
| 120 | return 0; |
| 121 | |
| 122 | error: |
| 123 | return -1; |
| 124 | } |
| 125 | |
| 126 | /* |
| 127 | * Receive a reply command status message from the consumer. Consumer socket |
| 128 | * lock MUST be acquired before calling this function. |
| 129 | * |
| 130 | * Return 0 on success, -1 on recv error or a negative lttng error code which |
| 131 | * was possibly returned by the consumer. |
| 132 | */ |
| 133 | int consumer_recv_status_reply(struct consumer_socket *sock) |
| 134 | { |
| 135 | int ret; |
| 136 | struct lttcomm_consumer_status_msg reply; |
| 137 | |
| 138 | assert(sock); |
| 139 | |
| 140 | ret = consumer_socket_recv(sock, &reply, sizeof(reply)); |
| 141 | if (ret < 0) { |
| 142 | goto end; |
| 143 | } |
| 144 | |
| 145 | if (reply.ret_code == LTTCOMM_CONSUMERD_SUCCESS) { |
| 146 | /* All good. */ |
| 147 | ret = 0; |
| 148 | } else { |
| 149 | ret = -reply.ret_code; |
| 150 | DBG("Consumer ret code %d", ret); |
| 151 | } |
| 152 | |
| 153 | end: |
| 154 | return ret; |
| 155 | } |
| 156 | |
| 157 | /* |
| 158 | * Once the ASK_CHANNEL command is sent to the consumer, the channel |
| 159 | * information are sent back. This call receives that data and populates key |
| 160 | * and stream_count. |
| 161 | * |
| 162 | * On success return 0 and both key and stream_count are set. On error, a |
| 163 | * negative value is sent back and both parameters are untouched. |
| 164 | */ |
| 165 | int consumer_recv_status_channel(struct consumer_socket *sock, |
| 166 | uint64_t *key, unsigned int *stream_count) |
| 167 | { |
| 168 | int ret; |
| 169 | struct lttcomm_consumer_status_channel reply; |
| 170 | |
| 171 | assert(sock); |
| 172 | assert(stream_count); |
| 173 | assert(key); |
| 174 | |
| 175 | ret = consumer_socket_recv(sock, &reply, sizeof(reply)); |
| 176 | if (ret < 0) { |
| 177 | goto end; |
| 178 | } |
| 179 | |
| 180 | /* An error is possible so don't touch the key and stream_count. */ |
| 181 | if (reply.ret_code != LTTCOMM_CONSUMERD_SUCCESS) { |
| 182 | ret = -1; |
| 183 | goto end; |
| 184 | } |
| 185 | |
| 186 | *key = reply.key; |
| 187 | *stream_count = reply.stream_count; |
| 188 | ret = 0; |
| 189 | |
| 190 | end: |
| 191 | return ret; |
| 192 | } |
| 193 | |
| 194 | /* |
| 195 | * Send destroy relayd command to consumer. |
| 196 | * |
| 197 | * On success return positive value. On error, negative value. |
| 198 | */ |
| 199 | int consumer_send_destroy_relayd(struct consumer_socket *sock, |
| 200 | struct consumer_output *consumer) |
| 201 | { |
| 202 | int ret; |
| 203 | struct lttcomm_consumer_msg msg; |
| 204 | |
| 205 | assert(consumer); |
| 206 | assert(sock); |
| 207 | |
| 208 | DBG2("Sending destroy relayd command to consumer sock %d", *sock->fd_ptr); |
| 209 | |
| 210 | msg.cmd_type = LTTNG_CONSUMER_DESTROY_RELAYD; |
| 211 | msg.u.destroy_relayd.net_seq_idx = consumer->net_seq_index; |
| 212 | |
| 213 | pthread_mutex_lock(sock->lock); |
| 214 | ret = consumer_socket_send(sock, &msg, sizeof(msg)); |
| 215 | if (ret < 0) { |
| 216 | goto error; |
| 217 | } |
| 218 | |
| 219 | /* Don't check the return value. The caller will do it. */ |
| 220 | ret = consumer_recv_status_reply(sock); |
| 221 | |
| 222 | DBG2("Consumer send destroy relayd command done"); |
| 223 | |
| 224 | error: |
| 225 | pthread_mutex_unlock(sock->lock); |
| 226 | return ret; |
| 227 | } |
| 228 | |
| 229 | /* |
| 230 | * For each consumer socket in the consumer output object, send a destroy |
| 231 | * relayd command. |
| 232 | */ |
| 233 | void consumer_output_send_destroy_relayd(struct consumer_output *consumer) |
| 234 | { |
| 235 | struct lttng_ht_iter iter; |
| 236 | struct consumer_socket *socket; |
| 237 | |
| 238 | assert(consumer); |
| 239 | |
| 240 | /* Destroy any relayd connection */ |
| 241 | if (consumer->type == CONSUMER_DST_NET) { |
| 242 | rcu_read_lock(); |
| 243 | cds_lfht_for_each_entry(consumer->socks->ht, &iter.iter, socket, |
| 244 | node.node) { |
| 245 | int ret; |
| 246 | |
| 247 | /* Send destroy relayd command */ |
| 248 | ret = consumer_send_destroy_relayd(socket, consumer); |
| 249 | if (ret < 0) { |
| 250 | DBG("Unable to send destroy relayd command to consumer"); |
| 251 | /* Continue since we MUST delete everything at this point. */ |
| 252 | } |
| 253 | } |
| 254 | rcu_read_unlock(); |
| 255 | } |
| 256 | } |
| 257 | |
| 258 | /* |
| 259 | * From a consumer_data structure, allocate and add a consumer socket to the |
| 260 | * consumer output. |
| 261 | * |
| 262 | * Return 0 on success, else negative value on error |
| 263 | */ |
| 264 | int consumer_create_socket(struct consumer_data *data, |
| 265 | struct consumer_output *output) |
| 266 | { |
| 267 | int ret = 0; |
| 268 | struct consumer_socket *socket; |
| 269 | |
| 270 | assert(data); |
| 271 | |
| 272 | if (output == NULL || data->cmd_sock < 0) { |
| 273 | /* |
| 274 | * Not an error. Possible there is simply not spawned consumer or it's |
| 275 | * disabled for the tracing session asking the socket. |
| 276 | */ |
| 277 | goto error; |
| 278 | } |
| 279 | |
| 280 | rcu_read_lock(); |
| 281 | socket = consumer_find_socket(data->cmd_sock, output); |
| 282 | rcu_read_unlock(); |
| 283 | if (socket == NULL) { |
| 284 | socket = consumer_allocate_socket(&data->cmd_sock); |
| 285 | if (socket == NULL) { |
| 286 | ret = -1; |
| 287 | goto error; |
| 288 | } |
| 289 | |
| 290 | socket->registered = 0; |
| 291 | socket->lock = &data->lock; |
| 292 | rcu_read_lock(); |
| 293 | consumer_add_socket(socket, output); |
| 294 | rcu_read_unlock(); |
| 295 | } |
| 296 | |
| 297 | socket->type = data->type; |
| 298 | |
| 299 | DBG3("Consumer socket created (fd: %d) and added to output", |
| 300 | data->cmd_sock); |
| 301 | |
| 302 | error: |
| 303 | return ret; |
| 304 | } |
| 305 | |
| 306 | /* |
| 307 | * Return the consumer socket from the given consumer output with the right |
| 308 | * bitness. On error, returns NULL. |
| 309 | * |
| 310 | * The caller MUST acquire a rcu read side lock and keep it until the socket |
| 311 | * object reference is not needed anymore. |
| 312 | */ |
| 313 | struct consumer_socket *consumer_find_socket_by_bitness(int bits, |
| 314 | struct consumer_output *consumer) |
| 315 | { |
| 316 | int consumer_fd; |
| 317 | struct consumer_socket *socket = NULL; |
| 318 | |
| 319 | switch (bits) { |
| 320 | case 64: |
| 321 | consumer_fd = uatomic_read(&ust_consumerd64_fd); |
| 322 | break; |
| 323 | case 32: |
| 324 | consumer_fd = uatomic_read(&ust_consumerd32_fd); |
| 325 | break; |
| 326 | default: |
| 327 | assert(0); |
| 328 | goto end; |
| 329 | } |
| 330 | |
| 331 | socket = consumer_find_socket(consumer_fd, consumer); |
| 332 | if (!socket) { |
| 333 | ERR("Consumer socket fd %d not found in consumer obj %p", |
| 334 | consumer_fd, consumer); |
| 335 | } |
| 336 | |
| 337 | end: |
| 338 | return socket; |
| 339 | } |
| 340 | |
| 341 | /* |
| 342 | * Find a consumer_socket in a consumer_output hashtable. Read side lock must |
| 343 | * be acquired before calling this function and across use of the |
| 344 | * returned consumer_socket. |
| 345 | */ |
| 346 | struct consumer_socket *consumer_find_socket(int key, |
| 347 | struct consumer_output *consumer) |
| 348 | { |
| 349 | struct lttng_ht_iter iter; |
| 350 | struct lttng_ht_node_ulong *node; |
| 351 | struct consumer_socket *socket = NULL; |
| 352 | |
| 353 | /* Negative keys are lookup failures */ |
| 354 | if (key < 0 || consumer == NULL) { |
| 355 | return NULL; |
| 356 | } |
| 357 | |
| 358 | lttng_ht_lookup(consumer->socks, (void *)((unsigned long) key), |
| 359 | &iter); |
| 360 | node = lttng_ht_iter_get_node_ulong(&iter); |
| 361 | if (node != NULL) { |
| 362 | socket = caa_container_of(node, struct consumer_socket, node); |
| 363 | } |
| 364 | |
| 365 | return socket; |
| 366 | } |
| 367 | |
| 368 | /* |
| 369 | * Allocate a new consumer_socket and return the pointer. |
| 370 | */ |
| 371 | struct consumer_socket *consumer_allocate_socket(int *fd) |
| 372 | { |
| 373 | struct consumer_socket *socket = NULL; |
| 374 | |
| 375 | assert(fd); |
| 376 | |
| 377 | socket = zmalloc(sizeof(struct consumer_socket)); |
| 378 | if (socket == NULL) { |
| 379 | PERROR("zmalloc consumer socket"); |
| 380 | goto error; |
| 381 | } |
| 382 | |
| 383 | socket->fd_ptr = fd; |
| 384 | lttng_ht_node_init_ulong(&socket->node, *fd); |
| 385 | |
| 386 | error: |
| 387 | return socket; |
| 388 | } |
| 389 | |
| 390 | /* |
| 391 | * Add consumer socket to consumer output object. Read side lock must be |
| 392 | * acquired before calling this function. |
| 393 | */ |
| 394 | void consumer_add_socket(struct consumer_socket *sock, |
| 395 | struct consumer_output *consumer) |
| 396 | { |
| 397 | assert(sock); |
| 398 | assert(consumer); |
| 399 | |
| 400 | lttng_ht_add_unique_ulong(consumer->socks, &sock->node); |
| 401 | } |
| 402 | |
| 403 | /* |
| 404 | * Delte consumer socket to consumer output object. Read side lock must be |
| 405 | * acquired before calling this function. |
| 406 | */ |
| 407 | void consumer_del_socket(struct consumer_socket *sock, |
| 408 | struct consumer_output *consumer) |
| 409 | { |
| 410 | int ret; |
| 411 | struct lttng_ht_iter iter; |
| 412 | |
| 413 | assert(sock); |
| 414 | assert(consumer); |
| 415 | |
| 416 | iter.iter.node = &sock->node.node; |
| 417 | ret = lttng_ht_del(consumer->socks, &iter); |
| 418 | assert(!ret); |
| 419 | } |
| 420 | |
| 421 | /* |
| 422 | * RCU destroy call function. |
| 423 | */ |
| 424 | static void destroy_socket_rcu(struct rcu_head *head) |
| 425 | { |
| 426 | struct lttng_ht_node_ulong *node = |
| 427 | caa_container_of(head, struct lttng_ht_node_ulong, head); |
| 428 | struct consumer_socket *socket = |
| 429 | caa_container_of(node, struct consumer_socket, node); |
| 430 | |
| 431 | free(socket); |
| 432 | } |
| 433 | |
| 434 | /* |
| 435 | * Destroy and free socket pointer in a call RCU. Read side lock must be |
| 436 | * acquired before calling this function. |
| 437 | */ |
| 438 | void consumer_destroy_socket(struct consumer_socket *sock) |
| 439 | { |
| 440 | assert(sock); |
| 441 | |
| 442 | /* |
| 443 | * We DO NOT close the file descriptor here since it is global to the |
| 444 | * session daemon and is closed only if the consumer dies or a custom |
| 445 | * consumer was registered, |
| 446 | */ |
| 447 | if (sock->registered) { |
| 448 | DBG3("Consumer socket was registered. Closing fd %d", *sock->fd_ptr); |
| 449 | lttcomm_close_unix_sock(*sock->fd_ptr); |
| 450 | } |
| 451 | |
| 452 | call_rcu(&sock->node.head, destroy_socket_rcu); |
| 453 | } |
| 454 | |
| 455 | /* |
| 456 | * Allocate and assign data to a consumer_output object. |
| 457 | * |
| 458 | * Return pointer to structure. |
| 459 | */ |
| 460 | struct consumer_output *consumer_create_output(enum consumer_dst_type type) |
| 461 | { |
| 462 | struct consumer_output *output = NULL; |
| 463 | |
| 464 | output = zmalloc(sizeof(struct consumer_output)); |
| 465 | if (output == NULL) { |
| 466 | PERROR("zmalloc consumer_output"); |
| 467 | goto error; |
| 468 | } |
| 469 | |
| 470 | /* By default, consumer output is enabled */ |
| 471 | output->enabled = 1; |
| 472 | output->type = type; |
| 473 | output->net_seq_index = (uint64_t) -1ULL; |
| 474 | |
| 475 | output->socks = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
| 476 | |
| 477 | error: |
| 478 | return output; |
| 479 | } |
| 480 | |
| 481 | /* |
| 482 | * Iterate over the consumer output socket hash table and destroy them. The |
| 483 | * socket file descriptor are only closed if the consumer output was |
| 484 | * registered meaning it's an external consumer. |
| 485 | */ |
| 486 | void consumer_destroy_output_sockets(struct consumer_output *obj) |
| 487 | { |
| 488 | struct lttng_ht_iter iter; |
| 489 | struct consumer_socket *socket; |
| 490 | |
| 491 | if (!obj->socks) { |
| 492 | return; |
| 493 | } |
| 494 | |
| 495 | rcu_read_lock(); |
| 496 | cds_lfht_for_each_entry(obj->socks->ht, &iter.iter, socket, node.node) { |
| 497 | consumer_del_socket(socket, obj); |
| 498 | consumer_destroy_socket(socket); |
| 499 | } |
| 500 | rcu_read_unlock(); |
| 501 | } |
| 502 | |
| 503 | /* |
| 504 | * Delete the consumer_output object from the list and free the ptr. |
| 505 | * |
| 506 | * Should *NOT* be called with RCU read-side lock held. |
| 507 | */ |
| 508 | void consumer_destroy_output(struct consumer_output *obj) |
| 509 | { |
| 510 | if (obj == NULL) { |
| 511 | return; |
| 512 | } |
| 513 | |
| 514 | consumer_destroy_output_sockets(obj); |
| 515 | |
| 516 | if (obj->socks) { |
| 517 | /* Finally destroy HT */ |
| 518 | ht_cleanup_push(obj->socks); |
| 519 | } |
| 520 | |
| 521 | free(obj); |
| 522 | } |
| 523 | |
| 524 | /* |
| 525 | * Copy consumer output and returned the newly allocated copy. |
| 526 | * |
| 527 | * Should *NOT* be called with RCU read-side lock held. |
| 528 | */ |
| 529 | struct consumer_output *consumer_copy_output(struct consumer_output *obj) |
| 530 | { |
| 531 | int ret; |
| 532 | struct lttng_ht *tmp_ht_ptr; |
| 533 | struct consumer_output *output; |
| 534 | |
| 535 | assert(obj); |
| 536 | |
| 537 | output = consumer_create_output(obj->type); |
| 538 | if (output == NULL) { |
| 539 | goto error; |
| 540 | } |
| 541 | /* Avoid losing the HT reference after the memcpy() */ |
| 542 | tmp_ht_ptr = output->socks; |
| 543 | |
| 544 | memcpy(output, obj, sizeof(struct consumer_output)); |
| 545 | |
| 546 | /* Putting back the HT pointer and start copying socket(s). */ |
| 547 | output->socks = tmp_ht_ptr; |
| 548 | |
| 549 | ret = consumer_copy_sockets(output, obj); |
| 550 | if (ret < 0) { |
| 551 | goto malloc_error; |
| 552 | } |
| 553 | |
| 554 | error: |
| 555 | return output; |
| 556 | |
| 557 | malloc_error: |
| 558 | consumer_destroy_output(output); |
| 559 | return NULL; |
| 560 | } |
| 561 | |
| 562 | /* |
| 563 | * Copy consumer sockets from src to dst. |
| 564 | * |
| 565 | * Return 0 on success or else a negative value. |
| 566 | */ |
| 567 | int consumer_copy_sockets(struct consumer_output *dst, |
| 568 | struct consumer_output *src) |
| 569 | { |
| 570 | int ret = 0; |
| 571 | struct lttng_ht_iter iter; |
| 572 | struct consumer_socket *socket, *copy_sock; |
| 573 | |
| 574 | assert(dst); |
| 575 | assert(src); |
| 576 | |
| 577 | rcu_read_lock(); |
| 578 | cds_lfht_for_each_entry(src->socks->ht, &iter.iter, socket, node.node) { |
| 579 | /* Ignore socket that are already there. */ |
| 580 | copy_sock = consumer_find_socket(*socket->fd_ptr, dst); |
| 581 | if (copy_sock) { |
| 582 | continue; |
| 583 | } |
| 584 | |
| 585 | /* Create new socket object. */ |
| 586 | copy_sock = consumer_allocate_socket(socket->fd_ptr); |
| 587 | if (copy_sock == NULL) { |
| 588 | rcu_read_unlock(); |
| 589 | ret = -ENOMEM; |
| 590 | goto error; |
| 591 | } |
| 592 | |
| 593 | copy_sock->registered = socket->registered; |
| 594 | /* |
| 595 | * This is valid because this lock is shared accross all consumer |
| 596 | * object being the global lock of the consumer data structure of the |
| 597 | * session daemon. |
| 598 | */ |
| 599 | copy_sock->lock = socket->lock; |
| 600 | consumer_add_socket(copy_sock, dst); |
| 601 | } |
| 602 | rcu_read_unlock(); |
| 603 | |
| 604 | error: |
| 605 | return ret; |
| 606 | } |
| 607 | |
| 608 | /* |
| 609 | * Set network URI to the consumer output object. |
| 610 | * |
| 611 | * Return 0 on success. Return 1 if the URI were equal. Else, negative value on |
| 612 | * error. |
| 613 | */ |
| 614 | int consumer_set_network_uri(struct consumer_output *obj, |
| 615 | struct lttng_uri *uri) |
| 616 | { |
| 617 | int ret; |
| 618 | char tmp_path[PATH_MAX]; |
| 619 | char hostname[HOST_NAME_MAX]; |
| 620 | struct lttng_uri *dst_uri = NULL; |
| 621 | |
| 622 | /* Code flow error safety net. */ |
| 623 | assert(obj); |
| 624 | assert(uri); |
| 625 | |
| 626 | switch (uri->stype) { |
| 627 | case LTTNG_STREAM_CONTROL: |
| 628 | dst_uri = &obj->dst.net.control; |
| 629 | obj->dst.net.control_isset = 1; |
| 630 | if (uri->port == 0) { |
| 631 | /* Assign default port. */ |
| 632 | uri->port = DEFAULT_NETWORK_CONTROL_PORT; |
| 633 | } else { |
| 634 | if (obj->dst.net.data_isset && uri->port == |
| 635 | obj->dst.net.data.port) { |
| 636 | ret = -LTTNG_ERR_INVALID; |
| 637 | goto error; |
| 638 | } |
| 639 | } |
| 640 | DBG3("Consumer control URI set with port %d", uri->port); |
| 641 | break; |
| 642 | case LTTNG_STREAM_DATA: |
| 643 | dst_uri = &obj->dst.net.data; |
| 644 | obj->dst.net.data_isset = 1; |
| 645 | if (uri->port == 0) { |
| 646 | /* Assign default port. */ |
| 647 | uri->port = DEFAULT_NETWORK_DATA_PORT; |
| 648 | } else { |
| 649 | if (obj->dst.net.control_isset && uri->port == |
| 650 | obj->dst.net.control.port) { |
| 651 | ret = -LTTNG_ERR_INVALID; |
| 652 | goto error; |
| 653 | } |
| 654 | } |
| 655 | DBG3("Consumer data URI set with port %d", uri->port); |
| 656 | break; |
| 657 | default: |
| 658 | ERR("Set network uri type unknown %d", uri->stype); |
| 659 | ret = -LTTNG_ERR_INVALID; |
| 660 | goto error; |
| 661 | } |
| 662 | |
| 663 | ret = uri_compare(dst_uri, uri); |
| 664 | if (!ret) { |
| 665 | /* Same URI, don't touch it and return success. */ |
| 666 | DBG3("URI network compare are the same"); |
| 667 | goto equal; |
| 668 | } |
| 669 | |
| 670 | /* URIs were not equal, replacing it. */ |
| 671 | memset(dst_uri, 0, sizeof(struct lttng_uri)); |
| 672 | memcpy(dst_uri, uri, sizeof(struct lttng_uri)); |
| 673 | obj->type = CONSUMER_DST_NET; |
| 674 | |
| 675 | /* Handle subdir and add hostname in front. */ |
| 676 | if (dst_uri->stype == LTTNG_STREAM_CONTROL) { |
| 677 | /* Get hostname to append it in the pathname */ |
| 678 | ret = gethostname(hostname, sizeof(hostname)); |
| 679 | if (ret < 0) { |
| 680 | PERROR("gethostname. Fallback on default localhost"); |
| 681 | strncpy(hostname, "localhost", sizeof(hostname)); |
| 682 | } |
| 683 | hostname[sizeof(hostname) - 1] = '\0'; |
| 684 | |
| 685 | /* Setup consumer subdir if none present in the control URI */ |
| 686 | if (strlen(dst_uri->subdir) == 0) { |
| 687 | ret = snprintf(tmp_path, sizeof(tmp_path), "%s/%s", |
| 688 | hostname, obj->subdir); |
| 689 | } else { |
| 690 | ret = snprintf(tmp_path, sizeof(tmp_path), "%s/%s", |
| 691 | hostname, dst_uri->subdir); |
| 692 | } |
| 693 | if (ret < 0) { |
| 694 | PERROR("snprintf set consumer uri subdir"); |
| 695 | ret = -LTTNG_ERR_NOMEM; |
| 696 | goto error; |
| 697 | } |
| 698 | |
| 699 | strncpy(obj->subdir, tmp_path, sizeof(obj->subdir)); |
| 700 | DBG3("Consumer set network uri subdir path %s", tmp_path); |
| 701 | } |
| 702 | |
| 703 | return 0; |
| 704 | equal: |
| 705 | return 1; |
| 706 | error: |
| 707 | return ret; |
| 708 | } |
| 709 | |
| 710 | /* |
| 711 | * Send file descriptor to consumer via sock. |
| 712 | */ |
| 713 | int consumer_send_fds(struct consumer_socket *sock, int *fds, size_t nb_fd) |
| 714 | { |
| 715 | int ret; |
| 716 | |
| 717 | assert(fds); |
| 718 | assert(sock); |
| 719 | assert(nb_fd > 0); |
| 720 | |
| 721 | ret = lttcomm_send_fds_unix_sock(*sock->fd_ptr, fds, nb_fd); |
| 722 | if (ret < 0) { |
| 723 | /* The above call will print a PERROR on error. */ |
| 724 | DBG("Error when sending consumer fds on sock %d", *sock->fd_ptr); |
| 725 | goto error; |
| 726 | } |
| 727 | |
| 728 | ret = consumer_recv_status_reply(sock); |
| 729 | |
| 730 | error: |
| 731 | return ret; |
| 732 | } |
| 733 | |
| 734 | /* |
| 735 | * Consumer send communication message structure to consumer. |
| 736 | */ |
| 737 | int consumer_send_msg(struct consumer_socket *sock, |
| 738 | struct lttcomm_consumer_msg *msg) |
| 739 | { |
| 740 | int ret; |
| 741 | |
| 742 | assert(msg); |
| 743 | assert(sock); |
| 744 | |
| 745 | ret = consumer_socket_send(sock, msg, sizeof(struct lttcomm_consumer_msg)); |
| 746 | if (ret < 0) { |
| 747 | goto error; |
| 748 | } |
| 749 | |
| 750 | ret = consumer_recv_status_reply(sock); |
| 751 | |
| 752 | error: |
| 753 | return ret; |
| 754 | } |
| 755 | |
| 756 | /* |
| 757 | * Consumer send channel communication message structure to consumer. |
| 758 | */ |
| 759 | int consumer_send_channel(struct consumer_socket *sock, |
| 760 | struct lttcomm_consumer_msg *msg) |
| 761 | { |
| 762 | int ret; |
| 763 | |
| 764 | assert(msg); |
| 765 | assert(sock); |
| 766 | |
| 767 | ret = consumer_send_msg(sock, msg); |
| 768 | if (ret < 0) { |
| 769 | goto error; |
| 770 | } |
| 771 | |
| 772 | error: |
| 773 | return ret; |
| 774 | } |
| 775 | |
| 776 | /* |
| 777 | * Populate the given consumer msg structure with the ask_channel command |
| 778 | * information. |
| 779 | */ |
| 780 | void consumer_init_ask_channel_comm_msg(struct lttcomm_consumer_msg *msg, |
| 781 | uint64_t subbuf_size, |
| 782 | uint64_t num_subbuf, |
| 783 | int overwrite, |
| 784 | unsigned int switch_timer_interval, |
| 785 | unsigned int read_timer_interval, |
| 786 | unsigned int live_timer_interval, |
| 787 | int output, |
| 788 | int type, |
| 789 | uint64_t session_id, |
| 790 | const char *pathname, |
| 791 | const char *name, |
| 792 | uid_t uid, |
| 793 | gid_t gid, |
| 794 | uint64_t relayd_id, |
| 795 | uint64_t key, |
| 796 | unsigned char *uuid, |
| 797 | uint32_t chan_id, |
| 798 | uint64_t tracefile_size, |
| 799 | uint64_t tracefile_count, |
| 800 | uint64_t session_id_per_pid, |
| 801 | unsigned int monitor, |
| 802 | uint32_t ust_app_uid) |
| 803 | { |
| 804 | assert(msg); |
| 805 | |
| 806 | /* Zeroed structure */ |
| 807 | memset(msg, 0, sizeof(struct lttcomm_consumer_msg)); |
| 808 | |
| 809 | msg->cmd_type = LTTNG_CONSUMER_ASK_CHANNEL_CREATION; |
| 810 | msg->u.ask_channel.subbuf_size = subbuf_size; |
| 811 | msg->u.ask_channel.num_subbuf = num_subbuf ; |
| 812 | msg->u.ask_channel.overwrite = overwrite; |
| 813 | msg->u.ask_channel.switch_timer_interval = switch_timer_interval; |
| 814 | msg->u.ask_channel.read_timer_interval = read_timer_interval; |
| 815 | msg->u.ask_channel.live_timer_interval = live_timer_interval; |
| 816 | msg->u.ask_channel.output = output; |
| 817 | msg->u.ask_channel.type = type; |
| 818 | msg->u.ask_channel.session_id = session_id; |
| 819 | msg->u.ask_channel.session_id_per_pid = session_id_per_pid; |
| 820 | msg->u.ask_channel.uid = uid; |
| 821 | msg->u.ask_channel.gid = gid; |
| 822 | msg->u.ask_channel.relayd_id = relayd_id; |
| 823 | msg->u.ask_channel.key = key; |
| 824 | msg->u.ask_channel.chan_id = chan_id; |
| 825 | msg->u.ask_channel.tracefile_size = tracefile_size; |
| 826 | msg->u.ask_channel.tracefile_count = tracefile_count; |
| 827 | msg->u.ask_channel.monitor = monitor; |
| 828 | msg->u.ask_channel.ust_app_uid = ust_app_uid; |
| 829 | |
| 830 | memcpy(msg->u.ask_channel.uuid, uuid, sizeof(msg->u.ask_channel.uuid)); |
| 831 | |
| 832 | if (pathname) { |
| 833 | strncpy(msg->u.ask_channel.pathname, pathname, |
| 834 | sizeof(msg->u.ask_channel.pathname)); |
| 835 | msg->u.ask_channel.pathname[sizeof(msg->u.ask_channel.pathname)-1] = '\0'; |
| 836 | } |
| 837 | |
| 838 | strncpy(msg->u.ask_channel.name, name, sizeof(msg->u.ask_channel.name)); |
| 839 | msg->u.ask_channel.name[sizeof(msg->u.ask_channel.name) - 1] = '\0'; |
| 840 | } |
| 841 | |
| 842 | /* |
| 843 | * Init channel communication message structure. |
| 844 | */ |
| 845 | void consumer_init_channel_comm_msg(struct lttcomm_consumer_msg *msg, |
| 846 | enum lttng_consumer_command cmd, |
| 847 | uint64_t channel_key, |
| 848 | uint64_t session_id, |
| 849 | const char *pathname, |
| 850 | uid_t uid, |
| 851 | gid_t gid, |
| 852 | uint64_t relayd_id, |
| 853 | const char *name, |
| 854 | unsigned int nb_init_streams, |
| 855 | enum lttng_event_output output, |
| 856 | int type, |
| 857 | uint64_t tracefile_size, |
| 858 | uint64_t tracefile_count, |
| 859 | unsigned int monitor, |
| 860 | unsigned int live_timer_interval) |
| 861 | { |
| 862 | assert(msg); |
| 863 | |
| 864 | /* Zeroed structure */ |
| 865 | memset(msg, 0, sizeof(struct lttcomm_consumer_msg)); |
| 866 | |
| 867 | /* Send channel */ |
| 868 | msg->cmd_type = cmd; |
| 869 | msg->u.channel.channel_key = channel_key; |
| 870 | msg->u.channel.session_id = session_id; |
| 871 | msg->u.channel.uid = uid; |
| 872 | msg->u.channel.gid = gid; |
| 873 | msg->u.channel.relayd_id = relayd_id; |
| 874 | msg->u.channel.nb_init_streams = nb_init_streams; |
| 875 | msg->u.channel.output = output; |
| 876 | msg->u.channel.type = type; |
| 877 | msg->u.channel.tracefile_size = tracefile_size; |
| 878 | msg->u.channel.tracefile_count = tracefile_count; |
| 879 | msg->u.channel.monitor = monitor; |
| 880 | msg->u.channel.live_timer_interval = live_timer_interval; |
| 881 | |
| 882 | strncpy(msg->u.channel.pathname, pathname, |
| 883 | sizeof(msg->u.channel.pathname)); |
| 884 | msg->u.channel.pathname[sizeof(msg->u.channel.pathname) - 1] = '\0'; |
| 885 | |
| 886 | strncpy(msg->u.channel.name, name, sizeof(msg->u.channel.name)); |
| 887 | msg->u.channel.name[sizeof(msg->u.channel.name) - 1] = '\0'; |
| 888 | } |
| 889 | |
| 890 | /* |
| 891 | * Init stream communication message structure. |
| 892 | */ |
| 893 | void consumer_init_stream_comm_msg(struct lttcomm_consumer_msg *msg, |
| 894 | enum lttng_consumer_command cmd, |
| 895 | uint64_t channel_key, |
| 896 | uint64_t stream_key, |
| 897 | int cpu) |
| 898 | { |
| 899 | assert(msg); |
| 900 | |
| 901 | memset(msg, 0, sizeof(struct lttcomm_consumer_msg)); |
| 902 | |
| 903 | msg->cmd_type = cmd; |
| 904 | msg->u.stream.channel_key = channel_key; |
| 905 | msg->u.stream.stream_key = stream_key; |
| 906 | msg->u.stream.cpu = cpu; |
| 907 | } |
| 908 | |
| 909 | /* |
| 910 | * Send stream communication structure to the consumer. |
| 911 | */ |
| 912 | int consumer_send_stream(struct consumer_socket *sock, |
| 913 | struct consumer_output *dst, struct lttcomm_consumer_msg *msg, |
| 914 | int *fds, size_t nb_fd) |
| 915 | { |
| 916 | int ret; |
| 917 | |
| 918 | assert(msg); |
| 919 | assert(dst); |
| 920 | assert(sock); |
| 921 | assert(fds); |
| 922 | |
| 923 | ret = consumer_send_msg(sock, msg); |
| 924 | if (ret < 0) { |
| 925 | goto error; |
| 926 | } |
| 927 | |
| 928 | ret = consumer_send_fds(sock, fds, nb_fd); |
| 929 | if (ret < 0) { |
| 930 | goto error; |
| 931 | } |
| 932 | |
| 933 | error: |
| 934 | return ret; |
| 935 | } |
| 936 | |
| 937 | /* |
| 938 | * Send relayd socket to consumer associated with a session name. |
| 939 | * |
| 940 | * On success return positive value. On error, negative value. |
| 941 | */ |
| 942 | int consumer_send_relayd_socket(struct consumer_socket *consumer_sock, |
| 943 | struct lttcomm_relayd_sock *rsock, struct consumer_output *consumer, |
| 944 | enum lttng_stream_type type, uint64_t session_id, |
| 945 | char *session_name, char *hostname, int session_live_timer) |
| 946 | { |
| 947 | int ret; |
| 948 | struct lttcomm_consumer_msg msg; |
| 949 | |
| 950 | /* Code flow error. Safety net. */ |
| 951 | assert(rsock); |
| 952 | assert(consumer); |
| 953 | assert(consumer_sock); |
| 954 | |
| 955 | /* Bail out if consumer is disabled */ |
| 956 | if (!consumer->enabled) { |
| 957 | ret = LTTNG_OK; |
| 958 | goto error; |
| 959 | } |
| 960 | |
| 961 | if (type == LTTNG_STREAM_CONTROL) { |
| 962 | ret = relayd_create_session(rsock, |
| 963 | &msg.u.relayd_sock.relayd_session_id, |
| 964 | session_name, hostname, session_live_timer, |
| 965 | consumer->snapshot); |
| 966 | if (ret < 0) { |
| 967 | /* Close the control socket. */ |
| 968 | (void) relayd_close(rsock); |
| 969 | goto error; |
| 970 | } |
| 971 | } |
| 972 | |
| 973 | msg.cmd_type = LTTNG_CONSUMER_ADD_RELAYD_SOCKET; |
| 974 | /* |
| 975 | * Assign network consumer output index using the temporary consumer since |
| 976 | * this call should only be made from within a set_consumer_uri() function |
| 977 | * call in the session daemon. |
| 978 | */ |
| 979 | msg.u.relayd_sock.net_index = consumer->net_seq_index; |
| 980 | msg.u.relayd_sock.type = type; |
| 981 | msg.u.relayd_sock.session_id = session_id; |
| 982 | memcpy(&msg.u.relayd_sock.sock, rsock, sizeof(msg.u.relayd_sock.sock)); |
| 983 | |
| 984 | DBG3("Sending relayd sock info to consumer on %d", *consumer_sock->fd_ptr); |
| 985 | ret = consumer_send_msg(consumer_sock, &msg); |
| 986 | if (ret < 0) { |
| 987 | goto error; |
| 988 | } |
| 989 | |
| 990 | DBG3("Sending relayd socket file descriptor to consumer"); |
| 991 | ret = consumer_send_fds(consumer_sock, &rsock->sock.fd, 1); |
| 992 | if (ret < 0) { |
| 993 | goto error; |
| 994 | } |
| 995 | |
| 996 | DBG2("Consumer relayd socket sent"); |
| 997 | |
| 998 | error: |
| 999 | return ret; |
| 1000 | } |
| 1001 | |
| 1002 | /* |
| 1003 | * Set consumer subdirectory using the session name and a generated datetime if |
| 1004 | * needed. This is appended to the current subdirectory. |
| 1005 | */ |
| 1006 | int consumer_set_subdir(struct consumer_output *consumer, |
| 1007 | const char *session_name) |
| 1008 | { |
| 1009 | int ret = 0; |
| 1010 | unsigned int have_default_name = 0; |
| 1011 | char datetime[16], tmp_path[PATH_MAX]; |
| 1012 | time_t rawtime; |
| 1013 | struct tm *timeinfo; |
| 1014 | |
| 1015 | assert(consumer); |
| 1016 | assert(session_name); |
| 1017 | |
| 1018 | memset(tmp_path, 0, sizeof(tmp_path)); |
| 1019 | |
| 1020 | /* Flag if we have a default session. */ |
| 1021 | if (strncmp(session_name, DEFAULT_SESSION_NAME "-", |
| 1022 | strlen(DEFAULT_SESSION_NAME) + 1) == 0) { |
| 1023 | have_default_name = 1; |
| 1024 | } else { |
| 1025 | /* Get date and time for session path */ |
| 1026 | time(&rawtime); |
| 1027 | timeinfo = localtime(&rawtime); |
| 1028 | strftime(datetime, sizeof(datetime), "%Y%m%d-%H%M%S", timeinfo); |
| 1029 | } |
| 1030 | |
| 1031 | if (have_default_name) { |
| 1032 | ret = snprintf(tmp_path, sizeof(tmp_path), |
| 1033 | "%s/%s", consumer->subdir, session_name); |
| 1034 | } else { |
| 1035 | ret = snprintf(tmp_path, sizeof(tmp_path), |
| 1036 | "%s/%s-%s/", consumer->subdir, session_name, datetime); |
| 1037 | } |
| 1038 | if (ret < 0) { |
| 1039 | PERROR("snprintf session name date"); |
| 1040 | goto error; |
| 1041 | } |
| 1042 | |
| 1043 | strncpy(consumer->subdir, tmp_path, sizeof(consumer->subdir)); |
| 1044 | DBG2("Consumer subdir set to %s", consumer->subdir); |
| 1045 | |
| 1046 | error: |
| 1047 | return ret; |
| 1048 | } |
| 1049 | |
| 1050 | /* |
| 1051 | * Ask the consumer if the data is ready to read (NOT pending) for the specific |
| 1052 | * session id. |
| 1053 | * |
| 1054 | * This function has a different behavior with the consumer i.e. that it waits |
| 1055 | * for a reply from the consumer if yes or no the data is pending. |
| 1056 | */ |
| 1057 | int consumer_is_data_pending(uint64_t session_id, |
| 1058 | struct consumer_output *consumer) |
| 1059 | { |
| 1060 | int ret; |
| 1061 | int32_t ret_code = 0; /* Default is that the data is NOT pending */ |
| 1062 | struct consumer_socket *socket; |
| 1063 | struct lttng_ht_iter iter; |
| 1064 | struct lttcomm_consumer_msg msg; |
| 1065 | |
| 1066 | assert(consumer); |
| 1067 | |
| 1068 | msg.cmd_type = LTTNG_CONSUMER_DATA_PENDING; |
| 1069 | |
| 1070 | msg.u.data_pending.session_id = session_id; |
| 1071 | |
| 1072 | DBG3("Consumer data pending for id %" PRIu64, session_id); |
| 1073 | |
| 1074 | /* Send command for each consumer */ |
| 1075 | rcu_read_lock(); |
| 1076 | cds_lfht_for_each_entry(consumer->socks->ht, &iter.iter, socket, |
| 1077 | node.node) { |
| 1078 | pthread_mutex_lock(socket->lock); |
| 1079 | ret = consumer_socket_send(socket, &msg, sizeof(msg)); |
| 1080 | if (ret < 0) { |
| 1081 | pthread_mutex_unlock(socket->lock); |
| 1082 | goto error_unlock; |
| 1083 | } |
| 1084 | |
| 1085 | /* |
| 1086 | * No need for a recv reply status because the answer to the command is |
| 1087 | * the reply status message. |
| 1088 | */ |
| 1089 | |
| 1090 | ret = consumer_socket_recv(socket, &ret_code, sizeof(ret_code)); |
| 1091 | if (ret < 0) { |
| 1092 | pthread_mutex_unlock(socket->lock); |
| 1093 | goto error_unlock; |
| 1094 | } |
| 1095 | pthread_mutex_unlock(socket->lock); |
| 1096 | |
| 1097 | if (ret_code == 1) { |
| 1098 | break; |
| 1099 | } |
| 1100 | } |
| 1101 | rcu_read_unlock(); |
| 1102 | |
| 1103 | DBG("Consumer data is %s pending for session id %" PRIu64, |
| 1104 | ret_code == 1 ? "" : "NOT", session_id); |
| 1105 | return ret_code; |
| 1106 | |
| 1107 | error_unlock: |
| 1108 | rcu_read_unlock(); |
| 1109 | return -1; |
| 1110 | } |
| 1111 | |
| 1112 | /* |
| 1113 | * Send a flush command to consumer using the given channel key. |
| 1114 | * |
| 1115 | * Return 0 on success else a negative value. |
| 1116 | */ |
| 1117 | int consumer_flush_channel(struct consumer_socket *socket, uint64_t key) |
| 1118 | { |
| 1119 | int ret; |
| 1120 | struct lttcomm_consumer_msg msg; |
| 1121 | |
| 1122 | assert(socket); |
| 1123 | |
| 1124 | DBG2("Consumer flush channel key %" PRIu64, key); |
| 1125 | |
| 1126 | msg.cmd_type = LTTNG_CONSUMER_FLUSH_CHANNEL; |
| 1127 | msg.u.flush_channel.key = key; |
| 1128 | |
| 1129 | pthread_mutex_lock(socket->lock); |
| 1130 | health_code_update(); |
| 1131 | |
| 1132 | ret = consumer_send_msg(socket, &msg); |
| 1133 | if (ret < 0) { |
| 1134 | goto end; |
| 1135 | } |
| 1136 | |
| 1137 | end: |
| 1138 | health_code_update(); |
| 1139 | pthread_mutex_unlock(socket->lock); |
| 1140 | return ret; |
| 1141 | } |
| 1142 | |
| 1143 | /* |
| 1144 | * Send a close metdata command to consumer using the given channel key. |
| 1145 | * |
| 1146 | * Return 0 on success else a negative value. |
| 1147 | */ |
| 1148 | int consumer_close_metadata(struct consumer_socket *socket, |
| 1149 | uint64_t metadata_key) |
| 1150 | { |
| 1151 | int ret; |
| 1152 | struct lttcomm_consumer_msg msg; |
| 1153 | |
| 1154 | assert(socket); |
| 1155 | |
| 1156 | DBG2("Consumer close metadata channel key %" PRIu64, metadata_key); |
| 1157 | |
| 1158 | msg.cmd_type = LTTNG_CONSUMER_CLOSE_METADATA; |
| 1159 | msg.u.close_metadata.key = metadata_key; |
| 1160 | |
| 1161 | pthread_mutex_lock(socket->lock); |
| 1162 | health_code_update(); |
| 1163 | |
| 1164 | ret = consumer_send_msg(socket, &msg); |
| 1165 | if (ret < 0) { |
| 1166 | goto end; |
| 1167 | } |
| 1168 | |
| 1169 | end: |
| 1170 | health_code_update(); |
| 1171 | pthread_mutex_unlock(socket->lock); |
| 1172 | return ret; |
| 1173 | } |
| 1174 | |
| 1175 | /* |
| 1176 | * Send a setup metdata command to consumer using the given channel key. |
| 1177 | * |
| 1178 | * Return 0 on success else a negative value. |
| 1179 | */ |
| 1180 | int consumer_setup_metadata(struct consumer_socket *socket, |
| 1181 | uint64_t metadata_key) |
| 1182 | { |
| 1183 | int ret; |
| 1184 | struct lttcomm_consumer_msg msg; |
| 1185 | |
| 1186 | assert(socket); |
| 1187 | |
| 1188 | DBG2("Consumer setup metadata channel key %" PRIu64, metadata_key); |
| 1189 | |
| 1190 | msg.cmd_type = LTTNG_CONSUMER_SETUP_METADATA; |
| 1191 | msg.u.setup_metadata.key = metadata_key; |
| 1192 | |
| 1193 | pthread_mutex_lock(socket->lock); |
| 1194 | health_code_update(); |
| 1195 | |
| 1196 | ret = consumer_send_msg(socket, &msg); |
| 1197 | if (ret < 0) { |
| 1198 | goto end; |
| 1199 | } |
| 1200 | |
| 1201 | end: |
| 1202 | health_code_update(); |
| 1203 | pthread_mutex_unlock(socket->lock); |
| 1204 | return ret; |
| 1205 | } |
| 1206 | |
| 1207 | /* |
| 1208 | * Send metadata string to consumer. Socket lock MUST be acquired. |
| 1209 | * |
| 1210 | * Return 0 on success else a negative value. |
| 1211 | */ |
| 1212 | int consumer_push_metadata(struct consumer_socket *socket, |
| 1213 | uint64_t metadata_key, char *metadata_str, size_t len, |
| 1214 | size_t target_offset) |
| 1215 | { |
| 1216 | int ret; |
| 1217 | struct lttcomm_consumer_msg msg; |
| 1218 | |
| 1219 | assert(socket); |
| 1220 | |
| 1221 | DBG2("Consumer push metadata to consumer socket %d", *socket->fd_ptr); |
| 1222 | |
| 1223 | msg.cmd_type = LTTNG_CONSUMER_PUSH_METADATA; |
| 1224 | msg.u.push_metadata.key = metadata_key; |
| 1225 | msg.u.push_metadata.target_offset = target_offset; |
| 1226 | msg.u.push_metadata.len = len; |
| 1227 | |
| 1228 | health_code_update(); |
| 1229 | ret = consumer_send_msg(socket, &msg); |
| 1230 | if (ret < 0 || len == 0) { |
| 1231 | goto end; |
| 1232 | } |
| 1233 | |
| 1234 | DBG3("Consumer pushing metadata on sock %d of len %zu", *socket->fd_ptr, |
| 1235 | len); |
| 1236 | |
| 1237 | ret = consumer_socket_send(socket, metadata_str, len); |
| 1238 | if (ret < 0) { |
| 1239 | goto end; |
| 1240 | } |
| 1241 | |
| 1242 | health_code_update(); |
| 1243 | ret = consumer_recv_status_reply(socket); |
| 1244 | if (ret < 0) { |
| 1245 | goto end; |
| 1246 | } |
| 1247 | |
| 1248 | end: |
| 1249 | health_code_update(); |
| 1250 | return ret; |
| 1251 | } |
| 1252 | |
| 1253 | /* |
| 1254 | * Ask the consumer to snapshot a specific channel using the key. |
| 1255 | * |
| 1256 | * Return 0 on success or else a negative error. |
| 1257 | */ |
| 1258 | int consumer_snapshot_channel(struct consumer_socket *socket, uint64_t key, |
| 1259 | struct snapshot_output *output, int metadata, uid_t uid, gid_t gid, |
| 1260 | const char *session_path, int wait, int max_stream_size) |
| 1261 | { |
| 1262 | int ret; |
| 1263 | struct lttcomm_consumer_msg msg; |
| 1264 | |
| 1265 | assert(socket); |
| 1266 | assert(output); |
| 1267 | assert(output->consumer); |
| 1268 | |
| 1269 | DBG("Consumer snapshot channel key %" PRIu64, key); |
| 1270 | |
| 1271 | memset(&msg, 0, sizeof(msg)); |
| 1272 | msg.cmd_type = LTTNG_CONSUMER_SNAPSHOT_CHANNEL; |
| 1273 | msg.u.snapshot_channel.key = key; |
| 1274 | msg.u.snapshot_channel.max_stream_size = max_stream_size; |
| 1275 | msg.u.snapshot_channel.metadata = metadata; |
| 1276 | |
| 1277 | if (output->consumer->type == CONSUMER_DST_NET) { |
| 1278 | msg.u.snapshot_channel.relayd_id = output->consumer->net_seq_index; |
| 1279 | msg.u.snapshot_channel.use_relayd = 1; |
| 1280 | ret = snprintf(msg.u.snapshot_channel.pathname, |
| 1281 | sizeof(msg.u.snapshot_channel.pathname), |
| 1282 | "%s/%s-%s-%" PRIu64 "%s", output->consumer->subdir, |
| 1283 | output->name, output->datetime, output->nb_snapshot, |
| 1284 | session_path); |
| 1285 | if (ret < 0) { |
| 1286 | ret = -LTTNG_ERR_NOMEM; |
| 1287 | goto error; |
| 1288 | } |
| 1289 | } else { |
| 1290 | ret = snprintf(msg.u.snapshot_channel.pathname, |
| 1291 | sizeof(msg.u.snapshot_channel.pathname), |
| 1292 | "%s/%s-%s-%" PRIu64 "%s", output->consumer->dst.trace_path, |
| 1293 | output->name, output->datetime, output->nb_snapshot, |
| 1294 | session_path); |
| 1295 | if (ret < 0) { |
| 1296 | ret = -LTTNG_ERR_NOMEM; |
| 1297 | goto error; |
| 1298 | } |
| 1299 | msg.u.snapshot_channel.relayd_id = (uint64_t) -1ULL; |
| 1300 | |
| 1301 | /* Create directory. Ignore if exist. */ |
| 1302 | ret = run_as_mkdir_recursive(msg.u.snapshot_channel.pathname, |
| 1303 | S_IRWXU | S_IRWXG, uid, gid); |
| 1304 | if (ret < 0) { |
| 1305 | if (ret != -EEXIST) { |
| 1306 | ERR("Trace directory creation error"); |
| 1307 | goto error; |
| 1308 | } |
| 1309 | } |
| 1310 | } |
| 1311 | |
| 1312 | health_code_update(); |
| 1313 | ret = consumer_send_msg(socket, &msg); |
| 1314 | if (ret < 0) { |
| 1315 | goto error; |
| 1316 | } |
| 1317 | |
| 1318 | error: |
| 1319 | health_code_update(); |
| 1320 | return ret; |
| 1321 | } |