| 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 | |
| 27 | #include <common/common.h> |
| 28 | #include <common/defaults.h> |
| 29 | #include <common/uri.h> |
| 30 | |
| 31 | #include "consumer.h" |
| 32 | |
| 33 | /* |
| 34 | * Send destroy relayd command to consumer. |
| 35 | * |
| 36 | * On success return positive value. On error, negative value. |
| 37 | */ |
| 38 | int consumer_send_destroy_relayd(struct consumer_socket *sock, |
| 39 | struct consumer_output *consumer) |
| 40 | { |
| 41 | int ret; |
| 42 | struct lttcomm_consumer_msg msg; |
| 43 | |
| 44 | assert(consumer); |
| 45 | assert(sock); |
| 46 | |
| 47 | DBG2("Sending destroy relayd command to consumer..."); |
| 48 | |
| 49 | /* Bail out if consumer is disabled */ |
| 50 | if (!consumer->enabled) { |
| 51 | ret = LTTNG_OK; |
| 52 | DBG3("Consumer is disabled"); |
| 53 | goto error; |
| 54 | } |
| 55 | |
| 56 | msg.cmd_type = LTTNG_CONSUMER_DESTROY_RELAYD; |
| 57 | msg.u.destroy_relayd.net_seq_idx = consumer->net_seq_index; |
| 58 | |
| 59 | pthread_mutex_lock(sock->lock); |
| 60 | ret = lttcomm_send_unix_sock(sock->fd, &msg, sizeof(msg)); |
| 61 | pthread_mutex_unlock(sock->lock); |
| 62 | if (ret < 0) { |
| 63 | PERROR("send consumer destroy relayd command"); |
| 64 | goto error; |
| 65 | } |
| 66 | |
| 67 | DBG2("Consumer send destroy relayd command done"); |
| 68 | |
| 69 | error: |
| 70 | return ret; |
| 71 | } |
| 72 | |
| 73 | /* |
| 74 | * For each consumer socket in the consumer output object, send a destroy |
| 75 | * relayd command. |
| 76 | */ |
| 77 | void consumer_output_send_destroy_relayd(struct consumer_output *consumer) |
| 78 | { |
| 79 | int ret; |
| 80 | struct lttng_ht_iter iter; |
| 81 | struct consumer_socket *socket; |
| 82 | |
| 83 | assert(consumer); |
| 84 | |
| 85 | /* Destroy any relayd connection */ |
| 86 | if (consumer && consumer->type == CONSUMER_DST_NET) { |
| 87 | rcu_read_lock(); |
| 88 | cds_lfht_for_each_entry(consumer->socks->ht, &iter.iter, socket, |
| 89 | node.node) { |
| 90 | /* Send destroy relayd command */ |
| 91 | ret = consumer_send_destroy_relayd(socket, consumer); |
| 92 | if (ret < 0) { |
| 93 | ERR("Unable to send destroy relayd command to consumer"); |
| 94 | /* Continue since we MUST delete everything at this point. */ |
| 95 | } |
| 96 | } |
| 97 | rcu_read_unlock(); |
| 98 | } |
| 99 | } |
| 100 | |
| 101 | /* |
| 102 | * From a consumer_data structure, allocate and add a consumer socket to the |
| 103 | * consumer output. |
| 104 | * |
| 105 | * Return 0 on success, else negative value on error |
| 106 | */ |
| 107 | int consumer_create_socket(struct consumer_data *data, |
| 108 | struct consumer_output *output) |
| 109 | { |
| 110 | int ret = 0; |
| 111 | struct consumer_socket *socket; |
| 112 | |
| 113 | assert(data); |
| 114 | |
| 115 | if (output == NULL || data->cmd_sock < 0) { |
| 116 | /* |
| 117 | * Not an error. Possible there is simply not spawned consumer or it's |
| 118 | * disabled for the tracing session asking the socket. |
| 119 | */ |
| 120 | goto error; |
| 121 | } |
| 122 | |
| 123 | rcu_read_lock(); |
| 124 | socket = consumer_find_socket(data->cmd_sock, output); |
| 125 | rcu_read_unlock(); |
| 126 | if (socket == NULL) { |
| 127 | socket = consumer_allocate_socket(data->cmd_sock); |
| 128 | if (socket == NULL) { |
| 129 | ret = -1; |
| 130 | goto error; |
| 131 | } |
| 132 | |
| 133 | socket->registered = 0; |
| 134 | socket->lock = &data->lock; |
| 135 | rcu_read_lock(); |
| 136 | consumer_add_socket(socket, output); |
| 137 | rcu_read_unlock(); |
| 138 | } |
| 139 | |
| 140 | DBG3("Consumer socket created (fd: %d) and added to output", |
| 141 | data->cmd_sock); |
| 142 | |
| 143 | error: |
| 144 | return ret; |
| 145 | } |
| 146 | |
| 147 | /* |
| 148 | * Find a consumer_socket in a consumer_output hashtable. Read side lock must |
| 149 | * be acquired before calling this function and across use of the |
| 150 | * returned consumer_socket. |
| 151 | */ |
| 152 | struct consumer_socket *consumer_find_socket(int key, |
| 153 | struct consumer_output *consumer) |
| 154 | { |
| 155 | struct lttng_ht_iter iter; |
| 156 | struct lttng_ht_node_ulong *node; |
| 157 | struct consumer_socket *socket = NULL; |
| 158 | |
| 159 | /* Negative keys are lookup failures */ |
| 160 | if (key < 0 || consumer == NULL) { |
| 161 | return NULL; |
| 162 | } |
| 163 | |
| 164 | lttng_ht_lookup(consumer->socks, (void *)((unsigned long) key), |
| 165 | &iter); |
| 166 | node = lttng_ht_iter_get_node_ulong(&iter); |
| 167 | if (node != NULL) { |
| 168 | socket = caa_container_of(node, struct consumer_socket, node); |
| 169 | } |
| 170 | |
| 171 | return socket; |
| 172 | } |
| 173 | |
| 174 | /* |
| 175 | * Allocate a new consumer_socket and return the pointer. |
| 176 | */ |
| 177 | struct consumer_socket *consumer_allocate_socket(int fd) |
| 178 | { |
| 179 | struct consumer_socket *socket = NULL; |
| 180 | |
| 181 | socket = zmalloc(sizeof(struct consumer_socket)); |
| 182 | if (socket == NULL) { |
| 183 | PERROR("zmalloc consumer socket"); |
| 184 | goto error; |
| 185 | } |
| 186 | |
| 187 | socket->fd = fd; |
| 188 | lttng_ht_node_init_ulong(&socket->node, fd); |
| 189 | |
| 190 | error: |
| 191 | return socket; |
| 192 | } |
| 193 | |
| 194 | /* |
| 195 | * Add consumer socket to consumer output object. Read side lock must be |
| 196 | * acquired before calling this function. |
| 197 | */ |
| 198 | void consumer_add_socket(struct consumer_socket *sock, |
| 199 | struct consumer_output *consumer) |
| 200 | { |
| 201 | assert(sock); |
| 202 | assert(consumer); |
| 203 | |
| 204 | lttng_ht_add_unique_ulong(consumer->socks, &sock->node); |
| 205 | } |
| 206 | |
| 207 | /* |
| 208 | * Delte consumer socket to consumer output object. Read side lock must be |
| 209 | * acquired before calling this function. |
| 210 | */ |
| 211 | void consumer_del_socket(struct consumer_socket *sock, |
| 212 | struct consumer_output *consumer) |
| 213 | { |
| 214 | int ret; |
| 215 | struct lttng_ht_iter iter; |
| 216 | |
| 217 | assert(sock); |
| 218 | assert(consumer); |
| 219 | |
| 220 | iter.iter.node = &sock->node.node; |
| 221 | ret = lttng_ht_del(consumer->socks, &iter); |
| 222 | assert(!ret); |
| 223 | } |
| 224 | |
| 225 | /* |
| 226 | * RCU destroy call function. |
| 227 | */ |
| 228 | static void destroy_socket_rcu(struct rcu_head *head) |
| 229 | { |
| 230 | struct lttng_ht_node_ulong *node = |
| 231 | caa_container_of(head, struct lttng_ht_node_ulong, head); |
| 232 | struct consumer_socket *socket = |
| 233 | caa_container_of(node, struct consumer_socket, node); |
| 234 | |
| 235 | free(socket); |
| 236 | } |
| 237 | |
| 238 | /* |
| 239 | * Destroy and free socket pointer in a call RCU. Read side lock must be |
| 240 | * acquired before calling this function. |
| 241 | */ |
| 242 | void consumer_destroy_socket(struct consumer_socket *sock) |
| 243 | { |
| 244 | assert(sock); |
| 245 | |
| 246 | /* |
| 247 | * We DO NOT close the file descriptor here since it is global to the |
| 248 | * session daemon and is closed only if the consumer dies or a custom |
| 249 | * consumer was registered, |
| 250 | */ |
| 251 | if (sock->registered) { |
| 252 | DBG3("Consumer socket was registered. Closing fd %d", sock->fd); |
| 253 | lttcomm_close_unix_sock(sock->fd); |
| 254 | } |
| 255 | |
| 256 | call_rcu(&sock->node.head, destroy_socket_rcu); |
| 257 | } |
| 258 | |
| 259 | /* |
| 260 | * Allocate and assign data to a consumer_output object. |
| 261 | * |
| 262 | * Return pointer to structure. |
| 263 | */ |
| 264 | struct consumer_output *consumer_create_output(enum consumer_dst_type type) |
| 265 | { |
| 266 | struct consumer_output *output = NULL; |
| 267 | |
| 268 | output = zmalloc(sizeof(struct consumer_output)); |
| 269 | if (output == NULL) { |
| 270 | PERROR("zmalloc consumer_output"); |
| 271 | goto error; |
| 272 | } |
| 273 | |
| 274 | /* By default, consumer output is enabled */ |
| 275 | output->enabled = 1; |
| 276 | output->type = type; |
| 277 | output->net_seq_index = -1; |
| 278 | |
| 279 | output->socks = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
| 280 | |
| 281 | error: |
| 282 | return output; |
| 283 | } |
| 284 | |
| 285 | /* |
| 286 | * Delete the consumer_output object from the list and free the ptr. |
| 287 | */ |
| 288 | void consumer_destroy_output(struct consumer_output *obj) |
| 289 | { |
| 290 | if (obj == NULL) { |
| 291 | return; |
| 292 | } |
| 293 | |
| 294 | if (obj->socks) { |
| 295 | struct lttng_ht_iter iter; |
| 296 | struct consumer_socket *socket; |
| 297 | |
| 298 | rcu_read_lock(); |
| 299 | cds_lfht_for_each_entry(obj->socks->ht, &iter.iter, socket, node.node) { |
| 300 | consumer_del_socket(socket, obj); |
| 301 | consumer_destroy_socket(socket); |
| 302 | } |
| 303 | rcu_read_unlock(); |
| 304 | |
| 305 | /* Finally destroy HT */ |
| 306 | lttng_ht_destroy(obj->socks); |
| 307 | } |
| 308 | |
| 309 | free(obj); |
| 310 | } |
| 311 | |
| 312 | /* |
| 313 | * Copy consumer output and returned the newly allocated copy. |
| 314 | */ |
| 315 | struct consumer_output *consumer_copy_output(struct consumer_output *obj) |
| 316 | { |
| 317 | struct lttng_ht_iter iter; |
| 318 | struct consumer_socket *socket, *copy_sock; |
| 319 | struct consumer_output *output; |
| 320 | |
| 321 | assert(obj); |
| 322 | |
| 323 | output = consumer_create_output(obj->type); |
| 324 | if (output == NULL) { |
| 325 | goto error; |
| 326 | } |
| 327 | |
| 328 | memcpy(output, obj, sizeof(struct consumer_output)); |
| 329 | |
| 330 | /* Copy sockets */ |
| 331 | output->socks = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
| 332 | |
| 333 | cds_lfht_for_each_entry(obj->socks->ht, &iter.iter, socket, node.node) { |
| 334 | /* Create new socket object. */ |
| 335 | copy_sock = consumer_allocate_socket(socket->fd); |
| 336 | if (copy_sock == NULL) { |
| 337 | goto malloc_error; |
| 338 | } |
| 339 | |
| 340 | copy_sock->lock = socket->lock; |
| 341 | consumer_add_socket(copy_sock, output); |
| 342 | } |
| 343 | |
| 344 | error: |
| 345 | return output; |
| 346 | |
| 347 | malloc_error: |
| 348 | consumer_destroy_output(output); |
| 349 | return NULL; |
| 350 | } |
| 351 | |
| 352 | /* |
| 353 | * Set network URI to the consumer output object. |
| 354 | * |
| 355 | * Return 0 on success. Return 1 if the URI were equal. Else, negative value on |
| 356 | * error. |
| 357 | */ |
| 358 | int consumer_set_network_uri(struct consumer_output *obj, |
| 359 | struct lttng_uri *uri) |
| 360 | { |
| 361 | int ret; |
| 362 | char tmp_path[PATH_MAX]; |
| 363 | char hostname[HOST_NAME_MAX]; |
| 364 | struct lttng_uri *dst_uri = NULL; |
| 365 | |
| 366 | /* Code flow error safety net. */ |
| 367 | assert(obj); |
| 368 | assert(uri); |
| 369 | |
| 370 | switch (uri->stype) { |
| 371 | case LTTNG_STREAM_CONTROL: |
| 372 | dst_uri = &obj->dst.net.control; |
| 373 | obj->dst.net.control_isset = 1; |
| 374 | if (uri->port == 0) { |
| 375 | /* Assign default port. */ |
| 376 | uri->port = DEFAULT_NETWORK_CONTROL_PORT; |
| 377 | } |
| 378 | DBG3("Consumer control URI set with port %d", uri->port); |
| 379 | break; |
| 380 | case LTTNG_STREAM_DATA: |
| 381 | dst_uri = &obj->dst.net.data; |
| 382 | obj->dst.net.data_isset = 1; |
| 383 | if (uri->port == 0) { |
| 384 | /* Assign default port. */ |
| 385 | uri->port = DEFAULT_NETWORK_DATA_PORT; |
| 386 | } |
| 387 | DBG3("Consumer data URI set with port %d", uri->port); |
| 388 | break; |
| 389 | default: |
| 390 | ERR("Set network uri type unknown %d", uri->stype); |
| 391 | goto error; |
| 392 | } |
| 393 | |
| 394 | ret = uri_compare(dst_uri, uri); |
| 395 | if (!ret) { |
| 396 | /* Same URI, don't touch it and return success. */ |
| 397 | DBG3("URI network compare are the same"); |
| 398 | goto equal; |
| 399 | } |
| 400 | |
| 401 | /* URIs were not equal, replacing it. */ |
| 402 | memset(dst_uri, 0, sizeof(struct lttng_uri)); |
| 403 | memcpy(dst_uri, uri, sizeof(struct lttng_uri)); |
| 404 | obj->type = CONSUMER_DST_NET; |
| 405 | |
| 406 | /* Handle subdir and add hostname in front. */ |
| 407 | if (dst_uri->stype == LTTNG_STREAM_CONTROL) { |
| 408 | /* Get hostname to append it in the pathname */ |
| 409 | ret = gethostname(hostname, sizeof(hostname)); |
| 410 | if (ret < 0) { |
| 411 | PERROR("gethostname. Fallback on default localhost"); |
| 412 | strncpy(hostname, "localhost", sizeof(hostname)); |
| 413 | } |
| 414 | hostname[sizeof(hostname) - 1] = '\0'; |
| 415 | |
| 416 | /* Setup consumer subdir if none present in the control URI */ |
| 417 | if (strlen(dst_uri->subdir) == 0) { |
| 418 | ret = snprintf(tmp_path, sizeof(tmp_path), "%s/%s", |
| 419 | hostname, obj->subdir); |
| 420 | } else { |
| 421 | ret = snprintf(tmp_path, sizeof(tmp_path), "%s/%s", |
| 422 | hostname, dst_uri->subdir); |
| 423 | } |
| 424 | if (ret < 0) { |
| 425 | PERROR("snprintf set consumer uri subdir"); |
| 426 | goto error; |
| 427 | } |
| 428 | |
| 429 | strncpy(obj->subdir, tmp_path, sizeof(obj->subdir)); |
| 430 | DBG3("Consumer set network uri subdir path %s", tmp_path); |
| 431 | } |
| 432 | |
| 433 | return 0; |
| 434 | equal: |
| 435 | return 1; |
| 436 | error: |
| 437 | return -1; |
| 438 | } |
| 439 | |
| 440 | /* |
| 441 | * Send file descriptor to consumer via sock. |
| 442 | */ |
| 443 | int consumer_send_fds(int sock, int *fds, size_t nb_fd) |
| 444 | { |
| 445 | int ret; |
| 446 | |
| 447 | assert(fds); |
| 448 | assert(nb_fd > 0); |
| 449 | |
| 450 | ret = lttcomm_send_fds_unix_sock(sock, fds, nb_fd); |
| 451 | if (ret < 0) { |
| 452 | PERROR("send consumer fds"); |
| 453 | goto error; |
| 454 | } |
| 455 | |
| 456 | error: |
| 457 | return ret; |
| 458 | } |
| 459 | |
| 460 | /* |
| 461 | * Consumer send channel communication message structure to consumer. |
| 462 | */ |
| 463 | int consumer_send_channel(int sock, struct lttcomm_consumer_msg *msg) |
| 464 | { |
| 465 | int ret; |
| 466 | |
| 467 | assert(msg); |
| 468 | assert(sock >= 0); |
| 469 | |
| 470 | ret = lttcomm_send_unix_sock(sock, msg, |
| 471 | sizeof(struct lttcomm_consumer_msg)); |
| 472 | if (ret < 0) { |
| 473 | PERROR("send consumer channel"); |
| 474 | goto error; |
| 475 | } |
| 476 | |
| 477 | error: |
| 478 | return ret; |
| 479 | } |
| 480 | |
| 481 | /* |
| 482 | * Init channel communication message structure. |
| 483 | */ |
| 484 | void consumer_init_channel_comm_msg(struct lttcomm_consumer_msg *msg, |
| 485 | enum lttng_consumer_command cmd, |
| 486 | int channel_key, |
| 487 | uint64_t max_sb_size, |
| 488 | uint64_t mmap_len, |
| 489 | const char *name, |
| 490 | unsigned int nb_init_streams) |
| 491 | { |
| 492 | assert(msg); |
| 493 | |
| 494 | /* TODO: Args validation */ |
| 495 | |
| 496 | /* Zeroed structure */ |
| 497 | memset(msg, 0, sizeof(struct lttcomm_consumer_msg)); |
| 498 | |
| 499 | /* Send channel */ |
| 500 | msg->cmd_type = cmd; |
| 501 | msg->u.channel.channel_key = channel_key; |
| 502 | msg->u.channel.max_sb_size = max_sb_size; |
| 503 | msg->u.channel.mmap_len = mmap_len; |
| 504 | msg->u.channel.nb_init_streams = nb_init_streams; |
| 505 | } |
| 506 | |
| 507 | /* |
| 508 | * Init stream communication message structure. |
| 509 | */ |
| 510 | void consumer_init_stream_comm_msg(struct lttcomm_consumer_msg *msg, |
| 511 | enum lttng_consumer_command cmd, |
| 512 | int channel_key, |
| 513 | int stream_key, |
| 514 | uint32_t state, |
| 515 | enum lttng_event_output output, |
| 516 | uint64_t mmap_len, |
| 517 | uid_t uid, |
| 518 | gid_t gid, |
| 519 | int net_index, |
| 520 | unsigned int metadata_flag, |
| 521 | const char *name, |
| 522 | const char *pathname, |
| 523 | unsigned int session_id) |
| 524 | { |
| 525 | assert(msg); |
| 526 | |
| 527 | memset(msg, 0, sizeof(struct lttcomm_consumer_msg)); |
| 528 | |
| 529 | /* TODO: Args validation */ |
| 530 | |
| 531 | msg->cmd_type = cmd; |
| 532 | msg->u.stream.channel_key = channel_key; |
| 533 | msg->u.stream.stream_key = stream_key; |
| 534 | msg->u.stream.state = state; |
| 535 | msg->u.stream.output = output; |
| 536 | msg->u.stream.mmap_len = mmap_len; |
| 537 | msg->u.stream.uid = uid; |
| 538 | msg->u.stream.gid = gid; |
| 539 | msg->u.stream.net_index = net_index; |
| 540 | msg->u.stream.metadata_flag = metadata_flag; |
| 541 | msg->u.stream.session_id = (uint64_t) session_id; |
| 542 | strncpy(msg->u.stream.name, name, sizeof(msg->u.stream.name)); |
| 543 | msg->u.stream.name[sizeof(msg->u.stream.name) - 1] = '\0'; |
| 544 | strncpy(msg->u.stream.path_name, pathname, |
| 545 | sizeof(msg->u.stream.path_name)); |
| 546 | msg->u.stream.path_name[sizeof(msg->u.stream.path_name) - 1] = '\0'; |
| 547 | } |
| 548 | |
| 549 | /* |
| 550 | * Send stream communication structure to the consumer. |
| 551 | */ |
| 552 | int consumer_send_stream(int sock, struct consumer_output *dst, |
| 553 | struct lttcomm_consumer_msg *msg, int *fds, size_t nb_fd) |
| 554 | { |
| 555 | int ret; |
| 556 | |
| 557 | assert(msg); |
| 558 | assert(dst); |
| 559 | |
| 560 | switch (dst->type) { |
| 561 | case CONSUMER_DST_NET: |
| 562 | /* Consumer should send the stream on the network. */ |
| 563 | msg->u.stream.net_index = dst->net_seq_index; |
| 564 | break; |
| 565 | case CONSUMER_DST_LOCAL: |
| 566 | /* Add stream file name to stream path */ |
| 567 | strncat(msg->u.stream.path_name, "/", |
| 568 | sizeof(msg->u.stream.path_name) - |
| 569 | strlen(msg->u.stream.path_name) - 1); |
| 570 | strncat(msg->u.stream.path_name, msg->u.stream.name, |
| 571 | sizeof(msg->u.stream.path_name) - |
| 572 | strlen(msg->u.stream.path_name) - 1); |
| 573 | msg->u.stream.path_name[sizeof(msg->u.stream.path_name) - 1] = '\0'; |
| 574 | /* Indicate that the stream is NOT network */ |
| 575 | msg->u.stream.net_index = -1; |
| 576 | break; |
| 577 | default: |
| 578 | ERR("Consumer unknown output type (%d)", dst->type); |
| 579 | ret = -1; |
| 580 | goto error; |
| 581 | } |
| 582 | |
| 583 | /* Send on socket */ |
| 584 | ret = lttcomm_send_unix_sock(sock, msg, |
| 585 | sizeof(struct lttcomm_consumer_msg)); |
| 586 | if (ret < 0) { |
| 587 | PERROR("send consumer stream"); |
| 588 | goto error; |
| 589 | } |
| 590 | |
| 591 | ret = consumer_send_fds(sock, fds, nb_fd); |
| 592 | if (ret < 0) { |
| 593 | goto error; |
| 594 | } |
| 595 | |
| 596 | error: |
| 597 | return ret; |
| 598 | } |
| 599 | |
| 600 | /* |
| 601 | * Send relayd socket to consumer associated with a session name. |
| 602 | * |
| 603 | * On success return positive value. On error, negative value. |
| 604 | */ |
| 605 | int consumer_send_relayd_socket(int consumer_sock, |
| 606 | struct lttcomm_sock *sock, struct consumer_output *consumer, |
| 607 | enum lttng_stream_type type) |
| 608 | { |
| 609 | int ret; |
| 610 | struct lttcomm_consumer_msg msg; |
| 611 | |
| 612 | /* Code flow error. Safety net. */ |
| 613 | assert(sock); |
| 614 | assert(consumer); |
| 615 | |
| 616 | /* Bail out if consumer is disabled */ |
| 617 | if (!consumer->enabled) { |
| 618 | ret = LTTNG_OK; |
| 619 | goto error; |
| 620 | } |
| 621 | |
| 622 | msg.cmd_type = LTTNG_CONSUMER_ADD_RELAYD_SOCKET; |
| 623 | /* |
| 624 | * Assign network consumer output index using the temporary consumer since |
| 625 | * this call should only be made from within a set_consumer_uri() function |
| 626 | * call in the session daemon. |
| 627 | */ |
| 628 | msg.u.relayd_sock.net_index = consumer->net_seq_index; |
| 629 | msg.u.relayd_sock.type = type; |
| 630 | memcpy(&msg.u.relayd_sock.sock, sock, sizeof(msg.u.relayd_sock.sock)); |
| 631 | |
| 632 | DBG3("Sending relayd sock info to consumer on %d", consumer_sock); |
| 633 | ret = lttcomm_send_unix_sock(consumer_sock, &msg, sizeof(msg)); |
| 634 | if (ret < 0) { |
| 635 | PERROR("send consumer relayd socket info"); |
| 636 | goto error; |
| 637 | } |
| 638 | |
| 639 | DBG3("Sending relayd socket file descriptor to consumer"); |
| 640 | ret = consumer_send_fds(consumer_sock, &sock->fd, 1); |
| 641 | if (ret < 0) { |
| 642 | goto error; |
| 643 | } |
| 644 | |
| 645 | DBG2("Consumer relayd socket sent"); |
| 646 | |
| 647 | error: |
| 648 | return ret; |
| 649 | } |
| 650 | |
| 651 | /* |
| 652 | * Set consumer subdirectory using the session name and a generated datetime if |
| 653 | * needed. This is appended to the current subdirectory. |
| 654 | */ |
| 655 | int consumer_set_subdir(struct consumer_output *consumer, |
| 656 | const char *session_name) |
| 657 | { |
| 658 | int ret = 0; |
| 659 | unsigned int have_default_name = 0; |
| 660 | char datetime[16], tmp_path[PATH_MAX]; |
| 661 | time_t rawtime; |
| 662 | struct tm *timeinfo; |
| 663 | |
| 664 | assert(consumer); |
| 665 | assert(session_name); |
| 666 | |
| 667 | memset(tmp_path, 0, sizeof(tmp_path)); |
| 668 | |
| 669 | /* Flag if we have a default session. */ |
| 670 | if (strncmp(session_name, DEFAULT_SESSION_NAME "-", |
| 671 | strlen(DEFAULT_SESSION_NAME) + 1) == 0) { |
| 672 | have_default_name = 1; |
| 673 | } else { |
| 674 | /* Get date and time for session path */ |
| 675 | time(&rawtime); |
| 676 | timeinfo = localtime(&rawtime); |
| 677 | strftime(datetime, sizeof(datetime), "%Y%m%d-%H%M%S", timeinfo); |
| 678 | } |
| 679 | |
| 680 | if (have_default_name) { |
| 681 | ret = snprintf(tmp_path, sizeof(tmp_path), |
| 682 | "%s/%s", consumer->subdir, session_name); |
| 683 | } else { |
| 684 | ret = snprintf(tmp_path, sizeof(tmp_path), |
| 685 | "%s/%s-%s/", consumer->subdir, session_name, datetime); |
| 686 | } |
| 687 | if (ret < 0) { |
| 688 | PERROR("snprintf session name date"); |
| 689 | goto error; |
| 690 | } |
| 691 | |
| 692 | strncpy(consumer->subdir, tmp_path, sizeof(consumer->subdir)); |
| 693 | DBG2("Consumer subdir set to %s", consumer->subdir); |
| 694 | |
| 695 | error: |
| 696 | return ret; |
| 697 | } |
| 698 | |
| 699 | /* |
| 700 | * Ask the consumer if the data is ready to bread (available) for the specific |
| 701 | * session id. |
| 702 | * |
| 703 | * This function has a different behavior with the consumer i.e. that it waits |
| 704 | * for a reply from the consumer if yes or no the data is available. |
| 705 | */ |
| 706 | int consumer_is_data_available(unsigned int id, |
| 707 | struct consumer_output *consumer) |
| 708 | { |
| 709 | int ret; |
| 710 | int32_t ret_code; |
| 711 | struct consumer_socket *socket; |
| 712 | struct lttng_ht_iter iter; |
| 713 | struct lttcomm_consumer_msg msg; |
| 714 | |
| 715 | assert(consumer); |
| 716 | |
| 717 | msg.cmd_type = LTTNG_CONSUMER_DATA_AVAILABLE; |
| 718 | |
| 719 | msg.u.data_available.session_id = (uint64_t) id; |
| 720 | |
| 721 | DBG3("Consumer data available for id %u", id); |
| 722 | |
| 723 | /* Send command for each consumer */ |
| 724 | cds_lfht_for_each_entry(consumer->socks->ht, &iter.iter, socket, |
| 725 | node.node) { |
| 726 | /* Code flow error */ |
| 727 | assert(socket->fd >= 0); |
| 728 | |
| 729 | pthread_mutex_lock(socket->lock); |
| 730 | |
| 731 | ret = lttcomm_send_unix_sock(socket->fd, &msg, sizeof(msg)); |
| 732 | if (ret < 0) { |
| 733 | PERROR("send consumer data available command"); |
| 734 | pthread_mutex_unlock(socket->lock); |
| 735 | goto error; |
| 736 | } |
| 737 | |
| 738 | /* |
| 739 | * Waiting for the reply code where 0 the data is not available and 1 |
| 740 | * it is for trace reading. |
| 741 | */ |
| 742 | ret = lttcomm_recv_unix_sock(socket->fd, &ret_code, sizeof(ret_code)); |
| 743 | if (ret < 0) { |
| 744 | PERROR("recv consumer data available status"); |
| 745 | pthread_mutex_unlock(socket->lock); |
| 746 | goto error; |
| 747 | } |
| 748 | |
| 749 | pthread_mutex_unlock(socket->lock); |
| 750 | |
| 751 | if (ret_code == 0) { |
| 752 | break; |
| 753 | } |
| 754 | } |
| 755 | |
| 756 | DBG("Consumer data available ret %d", ret_code); |
| 757 | return ret_code; |
| 758 | |
| 759 | error: |
| 760 | return -1; |
| 761 | } |