| 1 | /* |
| 2 | * Copyright (C) 2013 - Julien Desfossez <jdesfossez@efficios.com> |
| 3 | * Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
| 4 | * |
| 5 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
| 6 | * of this software and associated documentation files (the "Software"), to deal |
| 7 | * in the Software without restriction, including without limitation the rights |
| 8 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| 9 | * copies of the Software, and to permit persons to whom the Software is |
| 10 | * furnished to do so, subject to the following conditions: |
| 11 | * |
| 12 | * The above copyright notice and this permission notice shall be included in |
| 13 | * all copies or substantial portions of the Software. |
| 14 | * |
| 15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| 18 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 20 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 21 | * SOFTWARE. |
| 22 | */ |
| 23 | |
| 24 | #include <sys/socket.h> |
| 25 | #include <sys/types.h> |
| 26 | #include <netinet/in.h> |
| 27 | #include <netdb.h> |
| 28 | #include <stdio.h> |
| 29 | #include <string.h> |
| 30 | #include <stdlib.h> |
| 31 | #include <unistd.h> |
| 32 | #include <errno.h> |
| 33 | #include <inttypes.h> |
| 34 | #include <fcntl.h> |
| 35 | #include <sys/mman.h> |
| 36 | #include <poll.h> |
| 37 | |
| 38 | #include <babeltrace/ctf/ctf-index.h> |
| 39 | |
| 40 | #include <babeltrace/babeltrace.h> |
| 41 | #include <babeltrace/ctf/events.h> |
| 42 | #include <babeltrace/ctf/callbacks.h> |
| 43 | #include <babeltrace/ctf/iterator.h> |
| 44 | |
| 45 | /* for packet_index */ |
| 46 | #include <babeltrace/ctf/types.h> |
| 47 | |
| 48 | #include <babeltrace/ctf/metadata.h> |
| 49 | #include <babeltrace/ctf-text/types.h> |
| 50 | #include <babeltrace/ctf/events-internal.h> |
| 51 | #include <formats/ctf/events-private.h> |
| 52 | |
| 53 | #include <babeltrace/compat/memstream.h> |
| 54 | |
| 55 | #include "lttng-live.h" |
| 56 | #include "lttng-viewer-abi.h" |
| 57 | |
| 58 | #define ACTIVE_POLL_DELAY 100 /* ms */ |
| 59 | |
| 60 | /* |
| 61 | * Memory allocation zeroed |
| 62 | */ |
| 63 | #define zmalloc(x) calloc(1, x) |
| 64 | |
| 65 | #ifndef max_t |
| 66 | #define max_t(type, a, b) \ |
| 67 | ((type) (a) > (type) (b) ? (type) (a) : (type) (b)) |
| 68 | #endif |
| 69 | |
| 70 | static void ctf_live_packet_seek(struct bt_stream_pos *stream_pos, |
| 71 | size_t index, int whence); |
| 72 | static void add_traces(gpointer key, gpointer value, gpointer user_data); |
| 73 | static int del_traces(gpointer key, gpointer value, gpointer user_data); |
| 74 | static int get_new_metadata(struct lttng_live_ctx *ctx, |
| 75 | struct lttng_live_viewer_stream *viewer_stream, |
| 76 | char **metadata_buf); |
| 77 | |
| 78 | static |
| 79 | ssize_t lttng_live_recv(int fd, void *buf, size_t len) |
| 80 | { |
| 81 | ssize_t ret; |
| 82 | size_t copied = 0, to_copy = len; |
| 83 | |
| 84 | do { |
| 85 | ret = recv(fd, buf + copied, to_copy, 0); |
| 86 | if (ret > 0) { |
| 87 | assert(ret <= to_copy); |
| 88 | copied += ret; |
| 89 | to_copy -= ret; |
| 90 | } |
| 91 | } while ((ret > 0 && to_copy > 0) |
| 92 | || (ret < 0 && errno == EINTR)); |
| 93 | if (ret > 0) |
| 94 | ret = copied; |
| 95 | /* ret = 0 means orderly shutdown, ret < 0 is error. */ |
| 96 | return ret; |
| 97 | } |
| 98 | |
| 99 | static |
| 100 | ssize_t lttng_live_send(int fd, const void *buf, size_t len) |
| 101 | { |
| 102 | ssize_t ret; |
| 103 | |
| 104 | do { |
| 105 | ret = send(fd, buf, len, MSG_NOSIGNAL); |
| 106 | } while (ret < 0 && errno == EINTR); |
| 107 | return ret; |
| 108 | } |
| 109 | |
| 110 | int lttng_live_connect_viewer(struct lttng_live_ctx *ctx) |
| 111 | { |
| 112 | struct hostent *host; |
| 113 | struct sockaddr_in server_addr; |
| 114 | int ret; |
| 115 | |
| 116 | host = gethostbyname(ctx->relay_hostname); |
| 117 | if (!host) { |
| 118 | ret = -1; |
| 119 | goto end; |
| 120 | } |
| 121 | |
| 122 | if ((ctx->control_sock = socket(AF_INET, SOCK_STREAM, 0)) == -1) { |
| 123 | perror("Socket"); |
| 124 | ret = -1; |
| 125 | goto end; |
| 126 | } |
| 127 | |
| 128 | server_addr.sin_family = AF_INET; |
| 129 | server_addr.sin_port = htons(ctx->port); |
| 130 | server_addr.sin_addr = *((struct in_addr *) host->h_addr); |
| 131 | bzero(&(server_addr.sin_zero), 8); |
| 132 | |
| 133 | if (connect(ctx->control_sock, (struct sockaddr *) &server_addr, |
| 134 | sizeof(struct sockaddr)) == -1) { |
| 135 | perror("Connect"); |
| 136 | ret = -1; |
| 137 | goto end; |
| 138 | } |
| 139 | |
| 140 | ret = 0; |
| 141 | |
| 142 | end: |
| 143 | return ret; |
| 144 | } |
| 145 | |
| 146 | int lttng_live_establish_connection(struct lttng_live_ctx *ctx) |
| 147 | { |
| 148 | struct lttng_viewer_cmd cmd; |
| 149 | struct lttng_viewer_connect connect; |
| 150 | int ret; |
| 151 | ssize_t ret_len; |
| 152 | |
| 153 | cmd.cmd = htobe32(LTTNG_VIEWER_CONNECT); |
| 154 | cmd.data_size = sizeof(connect); |
| 155 | cmd.cmd_version = 0; |
| 156 | |
| 157 | connect.viewer_session_id = -1ULL; /* will be set on recv */ |
| 158 | connect.major = htobe32(LTTNG_LIVE_MAJOR); |
| 159 | connect.minor = htobe32(LTTNG_LIVE_MINOR); |
| 160 | connect.type = htobe32(LTTNG_VIEWER_CLIENT_COMMAND); |
| 161 | |
| 162 | ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd)); |
| 163 | if (ret_len < 0) { |
| 164 | perror("[error] Error sending cmd"); |
| 165 | ret = ret_len; |
| 166 | goto error; |
| 167 | } |
| 168 | assert(ret_len == sizeof(cmd)); |
| 169 | |
| 170 | ret_len = lttng_live_send(ctx->control_sock, &connect, sizeof(connect)); |
| 171 | if (ret_len < 0) { |
| 172 | perror("[error] Error sending version"); |
| 173 | ret = ret_len; |
| 174 | goto error; |
| 175 | } |
| 176 | assert(ret_len == sizeof(connect)); |
| 177 | |
| 178 | ret_len = lttng_live_recv(ctx->control_sock, &connect, sizeof(connect)); |
| 179 | if (ret_len == 0) { |
| 180 | fprintf(stderr, "[error] Remote side has closed connection\n"); |
| 181 | ret = -1; |
| 182 | goto error; |
| 183 | } |
| 184 | if (ret_len < 0) { |
| 185 | perror("[error] Error receiving version"); |
| 186 | ret = ret_len; |
| 187 | goto error; |
| 188 | } |
| 189 | assert(ret_len == sizeof(connect)); |
| 190 | |
| 191 | printf_verbose("Received viewer session ID : %" PRIu64 "\n", |
| 192 | be64toh(connect.viewer_session_id)); |
| 193 | printf_verbose("Relayd version : %u.%u\n", be32toh(connect.major), |
| 194 | be32toh(connect.minor)); |
| 195 | |
| 196 | ret = 0; |
| 197 | |
| 198 | error: |
| 199 | return ret; |
| 200 | } |
| 201 | |
| 202 | static |
| 203 | void free_session_list(GPtrArray *session_list) |
| 204 | { |
| 205 | int i; |
| 206 | struct lttng_live_relay_session *relay_session; |
| 207 | |
| 208 | for (i = 0; i < session_list->len; i++) { |
| 209 | relay_session = g_ptr_array_index(session_list, i); |
| 210 | free(relay_session->name); |
| 211 | free(relay_session->hostname); |
| 212 | } |
| 213 | g_ptr_array_free(session_list, TRUE); |
| 214 | } |
| 215 | |
| 216 | static |
| 217 | void print_session_list(GPtrArray *session_list, const char *path) |
| 218 | { |
| 219 | int i; |
| 220 | struct lttng_live_relay_session *relay_session; |
| 221 | |
| 222 | for (i = 0; i < session_list->len; i++) { |
| 223 | relay_session = g_ptr_array_index(session_list, i); |
| 224 | fprintf(stdout, "%s/host/%s/%s (timer = %u, " |
| 225 | "%u stream(s), %u client(s) connected)\n", |
| 226 | path, relay_session->hostname, |
| 227 | relay_session->name, relay_session->timer, |
| 228 | relay_session->streams, relay_session->clients); |
| 229 | } |
| 230 | } |
| 231 | |
| 232 | static |
| 233 | void update_session_list(GPtrArray *session_list, char *hostname, |
| 234 | char *session_name, uint32_t streams, uint32_t clients, |
| 235 | uint32_t timer) |
| 236 | { |
| 237 | int i, found = 0; |
| 238 | struct lttng_live_relay_session *relay_session; |
| 239 | |
| 240 | for (i = 0; i < session_list->len; i++) { |
| 241 | relay_session = g_ptr_array_index(session_list, i); |
| 242 | if ((strncmp(relay_session->hostname, hostname, NAME_MAX) == 0) && |
| 243 | strncmp(relay_session->name, |
| 244 | session_name, NAME_MAX) == 0) { |
| 245 | relay_session->streams += streams; |
| 246 | if (relay_session->clients < clients) |
| 247 | relay_session->clients = clients; |
| 248 | found = 1; |
| 249 | break; |
| 250 | } |
| 251 | } |
| 252 | if (found) |
| 253 | return; |
| 254 | |
| 255 | relay_session = g_new0(struct lttng_live_relay_session, 1); |
| 256 | relay_session->hostname = strndup(hostname, NAME_MAX); |
| 257 | relay_session->name = strndup(session_name, NAME_MAX); |
| 258 | relay_session->clients = clients; |
| 259 | relay_session->streams = streams; |
| 260 | relay_session->timer = timer; |
| 261 | g_ptr_array_add(session_list, relay_session); |
| 262 | } |
| 263 | |
| 264 | int lttng_live_list_sessions(struct lttng_live_ctx *ctx, const char *path) |
| 265 | { |
| 266 | struct lttng_viewer_cmd cmd; |
| 267 | struct lttng_viewer_list_sessions list; |
| 268 | struct lttng_viewer_session lsession; |
| 269 | int i, ret, sessions_count, print_list = 0; |
| 270 | ssize_t ret_len; |
| 271 | uint64_t session_id; |
| 272 | GPtrArray *session_list = NULL; |
| 273 | |
| 274 | if (strlen(ctx->session_name) == 0) { |
| 275 | print_list = 1; |
| 276 | session_list = g_ptr_array_new(); |
| 277 | } |
| 278 | |
| 279 | cmd.cmd = htobe32(LTTNG_VIEWER_LIST_SESSIONS); |
| 280 | cmd.data_size = 0; |
| 281 | cmd.cmd_version = 0; |
| 282 | |
| 283 | ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd)); |
| 284 | if (ret_len < 0) { |
| 285 | perror("[error] Error sending cmd"); |
| 286 | ret = ret_len; |
| 287 | goto error; |
| 288 | } |
| 289 | assert(ret_len == sizeof(cmd)); |
| 290 | |
| 291 | ret_len = lttng_live_recv(ctx->control_sock, &list, sizeof(list)); |
| 292 | if (ret_len == 0) { |
| 293 | fprintf(stderr, "[error] Remote side has closed connection\n"); |
| 294 | ret = -1; |
| 295 | goto error; |
| 296 | } |
| 297 | if (ret_len < 0) { |
| 298 | perror("[error] Error receiving session list"); |
| 299 | ret = ret_len; |
| 300 | goto error; |
| 301 | } |
| 302 | assert(ret_len == sizeof(list)); |
| 303 | |
| 304 | sessions_count = be32toh(list.sessions_count); |
| 305 | for (i = 0; i < sessions_count; i++) { |
| 306 | ret_len = lttng_live_recv(ctx->control_sock, &lsession, sizeof(lsession)); |
| 307 | if (ret_len == 0) { |
| 308 | fprintf(stderr, "[error] Remote side has closed connection\n"); |
| 309 | ret = -1; |
| 310 | goto error; |
| 311 | } |
| 312 | if (ret_len < 0) { |
| 313 | perror("[error] Error receiving session"); |
| 314 | ret = ret_len; |
| 315 | goto error; |
| 316 | } |
| 317 | assert(ret_len == sizeof(lsession)); |
| 318 | lsession.hostname[LTTNG_VIEWER_HOST_NAME_MAX - 1] = '\0'; |
| 319 | lsession.session_name[LTTNG_VIEWER_NAME_MAX - 1] = '\0'; |
| 320 | session_id = be64toh(lsession.id); |
| 321 | |
| 322 | if (print_list) { |
| 323 | update_session_list(session_list, |
| 324 | lsession.hostname, |
| 325 | lsession.session_name, |
| 326 | be32toh(lsession.streams), |
| 327 | be32toh(lsession.clients), |
| 328 | be32toh(lsession.live_timer)); |
| 329 | } else { |
| 330 | if ((strncmp(lsession.session_name, ctx->session_name, |
| 331 | NAME_MAX) == 0) && (strncmp(lsession.hostname, |
| 332 | ctx->traced_hostname, NAME_MAX) == 0)) { |
| 333 | printf_verbose("Reading from session %" PRIu64 "\n", |
| 334 | session_id); |
| 335 | g_array_append_val(ctx->session_ids, |
| 336 | session_id); |
| 337 | } |
| 338 | } |
| 339 | } |
| 340 | |
| 341 | if (print_list) { |
| 342 | print_session_list(session_list, path); |
| 343 | free_session_list(session_list); |
| 344 | } |
| 345 | |
| 346 | ret = 0; |
| 347 | |
| 348 | error: |
| 349 | return ret; |
| 350 | } |
| 351 | |
| 352 | int lttng_live_ctf_trace_assign(struct lttng_live_viewer_stream *stream, |
| 353 | uint64_t ctf_trace_id) |
| 354 | { |
| 355 | struct lttng_live_ctf_trace *trace; |
| 356 | int ret = 0; |
| 357 | |
| 358 | trace = g_hash_table_lookup(stream->session->ctf_traces, |
| 359 | (gpointer) ctf_trace_id); |
| 360 | if (!trace) { |
| 361 | trace = g_new0(struct lttng_live_ctf_trace, 1); |
| 362 | trace->ctf_trace_id = ctf_trace_id; |
| 363 | trace->streams = g_ptr_array_new(); |
| 364 | g_hash_table_insert(stream->session->ctf_traces, |
| 365 | (gpointer) ctf_trace_id, |
| 366 | trace); |
| 367 | } |
| 368 | if (stream->metadata_flag) |
| 369 | trace->metadata_stream = stream; |
| 370 | |
| 371 | stream->ctf_trace = trace; |
| 372 | g_ptr_array_add(trace->streams, stream); |
| 373 | |
| 374 | return ret; |
| 375 | } |
| 376 | |
| 377 | static |
| 378 | int open_metadata_fp_write(struct lttng_live_viewer_stream *stream, |
| 379 | char **metadata_buf, size_t *size) |
| 380 | { |
| 381 | int ret = 0; |
| 382 | |
| 383 | stream->metadata_fp_write = |
| 384 | babeltrace_open_memstream(metadata_buf, size); |
| 385 | if (!stream->metadata_fp_write) { |
| 386 | perror("Metadata open_memstream"); |
| 387 | ret = -1; |
| 388 | } |
| 389 | |
| 390 | return ret; |
| 391 | } |
| 392 | |
| 393 | int lttng_live_attach_session(struct lttng_live_ctx *ctx, uint64_t id) |
| 394 | { |
| 395 | struct lttng_viewer_cmd cmd; |
| 396 | struct lttng_viewer_attach_session_request rq; |
| 397 | struct lttng_viewer_attach_session_response rp; |
| 398 | struct lttng_viewer_stream stream; |
| 399 | int ret, i; |
| 400 | ssize_t ret_len; |
| 401 | |
| 402 | cmd.cmd = htobe32(LTTNG_VIEWER_ATTACH_SESSION); |
| 403 | cmd.data_size = sizeof(rq); |
| 404 | cmd.cmd_version = 0; |
| 405 | |
| 406 | memset(&rq, 0, sizeof(rq)); |
| 407 | rq.session_id = htobe64(id); |
| 408 | // TODO: add cmd line parameter to select seek beginning |
| 409 | // rq.seek = htobe32(LTTNG_VIEWER_SEEK_BEGINNING); |
| 410 | rq.seek = htobe32(LTTNG_VIEWER_SEEK_LAST); |
| 411 | |
| 412 | ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd)); |
| 413 | if (ret_len < 0) { |
| 414 | perror("[error] Error sending cmd"); |
| 415 | ret = ret_len; |
| 416 | goto error; |
| 417 | } |
| 418 | assert(ret_len == sizeof(cmd)); |
| 419 | |
| 420 | ret_len = lttng_live_send(ctx->control_sock, &rq, sizeof(rq)); |
| 421 | if (ret_len < 0) { |
| 422 | perror("[error] Error sending attach request"); |
| 423 | ret = ret_len; |
| 424 | goto error; |
| 425 | } |
| 426 | assert(ret_len == sizeof(rq)); |
| 427 | |
| 428 | ret_len = lttng_live_recv(ctx->control_sock, &rp, sizeof(rp)); |
| 429 | if (ret_len == 0) { |
| 430 | fprintf(stderr, "[error] Remote side has closed connection\n"); |
| 431 | ret = -1; |
| 432 | goto error; |
| 433 | } |
| 434 | if (ret_len < 0) { |
| 435 | perror("[error] Error receiving attach response"); |
| 436 | ret = ret_len; |
| 437 | goto error; |
| 438 | } |
| 439 | assert(ret_len == sizeof(rp)); |
| 440 | |
| 441 | switch(be32toh(rp.status)) { |
| 442 | case LTTNG_VIEWER_ATTACH_OK: |
| 443 | break; |
| 444 | case LTTNG_VIEWER_ATTACH_UNK: |
| 445 | ret = -LTTNG_VIEWER_ATTACH_UNK; |
| 446 | goto end; |
| 447 | case LTTNG_VIEWER_ATTACH_ALREADY: |
| 448 | fprintf(stderr, "[error] There is already a viewer attached to this session\n"); |
| 449 | ret = -1; |
| 450 | goto end; |
| 451 | case LTTNG_VIEWER_ATTACH_NOT_LIVE: |
| 452 | fprintf(stderr, "[error] Not a live session\n"); |
| 453 | ret = -1; |
| 454 | goto end; |
| 455 | case LTTNG_VIEWER_ATTACH_SEEK_ERR: |
| 456 | fprintf(stderr, "[error] Wrong seek parameter\n"); |
| 457 | ret = -1; |
| 458 | goto end; |
| 459 | default: |
| 460 | fprintf(stderr, "[error] Unknown attach return code %u\n", |
| 461 | be32toh(rp.status)); |
| 462 | ret = -1; |
| 463 | goto end; |
| 464 | } |
| 465 | if (be32toh(rp.status) != LTTNG_VIEWER_ATTACH_OK) { |
| 466 | ret = -1; |
| 467 | goto end; |
| 468 | } |
| 469 | |
| 470 | ctx->session->stream_count += be32toh(rp.streams_count); |
| 471 | /* |
| 472 | * When the session is created but not started, we do an active wait |
| 473 | * until it starts. It allows the viewer to start processing the trace |
| 474 | * as soon as the session starts. |
| 475 | */ |
| 476 | if (ctx->session->stream_count == 0) { |
| 477 | ret = 0; |
| 478 | goto end; |
| 479 | } |
| 480 | printf_verbose("Waiting for %" PRIu64 " streams:\n", |
| 481 | ctx->session->stream_count); |
| 482 | ctx->session->streams = g_new0(struct lttng_live_viewer_stream, |
| 483 | ctx->session->stream_count); |
| 484 | for (i = 0; i < be32toh(rp.streams_count); i++) { |
| 485 | ret_len = lttng_live_recv(ctx->control_sock, &stream, sizeof(stream)); |
| 486 | if (ret_len == 0) { |
| 487 | fprintf(stderr, "[error] Remote side has closed connection\n"); |
| 488 | ret = -1; |
| 489 | goto error; |
| 490 | } |
| 491 | if (ret_len < 0) { |
| 492 | perror("[error] Error receiving stream"); |
| 493 | ret = ret_len; |
| 494 | goto error; |
| 495 | } |
| 496 | assert(ret_len == sizeof(stream)); |
| 497 | stream.path_name[LTTNG_VIEWER_PATH_MAX - 1] = '\0'; |
| 498 | stream.channel_name[LTTNG_VIEWER_NAME_MAX - 1] = '\0'; |
| 499 | |
| 500 | printf_verbose(" stream %" PRIu64 " : %s/%s\n", |
| 501 | be64toh(stream.id), stream.path_name, |
| 502 | stream.channel_name); |
| 503 | ctx->session->streams[i].id = be64toh(stream.id); |
| 504 | ctx->session->streams[i].session = ctx->session; |
| 505 | |
| 506 | ctx->session->streams[i].first_read = 1; |
| 507 | ctx->session->streams[i].mmap_size = 0; |
| 508 | |
| 509 | if (be32toh(stream.metadata_flag)) { |
| 510 | ctx->session->streams[i].metadata_flag = 1; |
| 511 | } |
| 512 | ret = lttng_live_ctf_trace_assign(&ctx->session->streams[i], |
| 513 | be64toh(stream.ctf_trace_id)); |
| 514 | if (ret < 0) { |
| 515 | goto error; |
| 516 | } |
| 517 | |
| 518 | } |
| 519 | ret = 0; |
| 520 | |
| 521 | end: |
| 522 | error: |
| 523 | return ret; |
| 524 | } |
| 525 | |
| 526 | static |
| 527 | int ask_new_streams(struct lttng_live_ctx *ctx) |
| 528 | { |
| 529 | int i, ret = 0; |
| 530 | uint64_t id; |
| 531 | |
| 532 | restart: |
| 533 | for (i = 0; i < ctx->session_ids->len; i++) { |
| 534 | id = g_array_index(ctx->session_ids, uint64_t, i); |
| 535 | ret = lttng_live_get_new_streams(ctx, id); |
| 536 | printf_verbose("Asking for new streams returns %d\n", |
| 537 | ret); |
| 538 | if (ret < 0) { |
| 539 | if (ret == -LTTNG_VIEWER_NEW_STREAMS_HUP) { |
| 540 | printf_verbose("Session %" PRIu64 " closed\n", |
| 541 | id); |
| 542 | /* |
| 543 | * The streams have already been closed during |
| 544 | * the reading, so we only need to get rid of |
| 545 | * the trace in our internal table of sessions. |
| 546 | */ |
| 547 | g_array_remove_index(ctx->session_ids, i); |
| 548 | /* |
| 549 | * We can't continue iterating on the g_array |
| 550 | * after a remove, we have to start again. |
| 551 | */ |
| 552 | goto restart; |
| 553 | } else { |
| 554 | ret = -1; |
| 555 | goto end; |
| 556 | } |
| 557 | } |
| 558 | } |
| 559 | |
| 560 | end: |
| 561 | return ret; |
| 562 | } |
| 563 | |
| 564 | static |
| 565 | int append_metadata(struct lttng_live_ctx *ctx, |
| 566 | struct lttng_live_viewer_stream *viewer_stream) |
| 567 | { |
| 568 | int ret; |
| 569 | struct lttng_live_viewer_stream *metadata; |
| 570 | char *metadata_buf = NULL; |
| 571 | |
| 572 | printf_verbose("get_next_index: new metadata needed\n"); |
| 573 | ret = get_new_metadata(ctx, viewer_stream, &metadata_buf); |
| 574 | if (ret < 0) { |
| 575 | free(metadata_buf); |
| 576 | goto error; |
| 577 | } |
| 578 | |
| 579 | metadata = viewer_stream->ctf_trace->metadata_stream; |
| 580 | metadata->ctf_trace->metadata_fp = |
| 581 | babeltrace_fmemopen(metadata_buf, |
| 582 | metadata->metadata_len, "rb"); |
| 583 | if (!metadata->ctf_trace->metadata_fp) { |
| 584 | perror("Metadata fmemopen"); |
| 585 | free(metadata_buf); |
| 586 | ret = -1; |
| 587 | goto error; |
| 588 | } |
| 589 | ret = ctf_append_trace_metadata( |
| 590 | viewer_stream->ctf_trace->handle->td, |
| 591 | metadata->ctf_trace->metadata_fp); |
| 592 | if (ret != 0) { |
| 593 | fprintf(stderr, "[error] Appending metadata\n"); |
| 594 | goto error; |
| 595 | } |
| 596 | |
| 597 | error: |
| 598 | return ret; |
| 599 | } |
| 600 | |
| 601 | static |
| 602 | int get_data_packet(struct lttng_live_ctx *ctx, |
| 603 | struct ctf_stream_pos *pos, |
| 604 | struct lttng_live_viewer_stream *stream, uint64_t offset, |
| 605 | uint64_t len) |
| 606 | { |
| 607 | struct lttng_viewer_cmd cmd; |
| 608 | struct lttng_viewer_get_packet rq; |
| 609 | struct lttng_viewer_trace_packet rp; |
| 610 | ssize_t ret_len; |
| 611 | int ret; |
| 612 | |
| 613 | retry: |
| 614 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_PACKET); |
| 615 | cmd.data_size = sizeof(rq); |
| 616 | cmd.cmd_version = 0; |
| 617 | |
| 618 | memset(&rq, 0, sizeof(rq)); |
| 619 | rq.stream_id = htobe64(stream->id); |
| 620 | /* Already in big endian. */ |
| 621 | rq.offset = offset; |
| 622 | rq.len = htobe32(len); |
| 623 | |
| 624 | ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd)); |
| 625 | if (ret_len < 0) { |
| 626 | perror("[error] Error sending cmd"); |
| 627 | ret = ret_len; |
| 628 | goto error; |
| 629 | } |
| 630 | assert(ret_len == sizeof(cmd)); |
| 631 | |
| 632 | ret_len = lttng_live_send(ctx->control_sock, &rq, sizeof(rq)); |
| 633 | if (ret_len < 0) { |
| 634 | perror("[error] Error sending get_data_packet request"); |
| 635 | ret = ret_len; |
| 636 | goto error; |
| 637 | } |
| 638 | assert(ret_len == sizeof(rq)); |
| 639 | |
| 640 | ret_len = lttng_live_recv(ctx->control_sock, &rp, sizeof(rp)); |
| 641 | if (ret_len == 0) { |
| 642 | fprintf(stderr, "[error] Remote side has closed connection\n"); |
| 643 | ret = -1; |
| 644 | goto error; |
| 645 | } |
| 646 | if (ret_len < 0) { |
| 647 | perror("[error] Error receiving data response"); |
| 648 | ret = ret_len; |
| 649 | goto error; |
| 650 | } |
| 651 | if (ret_len != sizeof(rp)) { |
| 652 | fprintf(stderr, "[error] get_data_packet: expected %" PRId64 |
| 653 | ", received %" PRId64 "\n", ret_len, |
| 654 | sizeof(rp)); |
| 655 | ret = -1; |
| 656 | goto error; |
| 657 | } |
| 658 | |
| 659 | rp.flags = be32toh(rp.flags); |
| 660 | |
| 661 | switch (be32toh(rp.status)) { |
| 662 | case LTTNG_VIEWER_GET_PACKET_OK: |
| 663 | len = be32toh(rp.len); |
| 664 | printf_verbose("get_data_packet: Ok, packet size : %" PRIu64 |
| 665 | "\n", len); |
| 666 | break; |
| 667 | case LTTNG_VIEWER_GET_PACKET_RETRY: |
| 668 | printf_verbose("get_data_packet: retry\n"); |
| 669 | ret = -1; |
| 670 | goto end; |
| 671 | case LTTNG_VIEWER_GET_PACKET_ERR: |
| 672 | if (rp.flags & LTTNG_VIEWER_FLAG_NEW_METADATA) { |
| 673 | printf_verbose("get_data_packet: new metadata needed\n"); |
| 674 | ret = append_metadata(ctx, stream); |
| 675 | if (ret) |
| 676 | goto error; |
| 677 | goto retry; |
| 678 | } |
| 679 | if (rp.flags & LTTNG_VIEWER_FLAG_NEW_STREAM) { |
| 680 | ret = ask_new_streams(ctx); |
| 681 | if (ret < 0) |
| 682 | goto error; |
| 683 | g_hash_table_foreach(ctx->session->ctf_traces, add_traces, |
| 684 | ctx->bt_ctx); |
| 685 | } |
| 686 | fprintf(stderr, "[error] get_data_packet: error\n"); |
| 687 | ret = -1; |
| 688 | goto end; |
| 689 | case LTTNG_VIEWER_GET_PACKET_EOF: |
| 690 | ret = -2; |
| 691 | goto error; |
| 692 | default: |
| 693 | printf_verbose("get_data_packet: unknown\n"); |
| 694 | assert(0); |
| 695 | ret = -1; |
| 696 | goto end; |
| 697 | } |
| 698 | |
| 699 | if (len <= 0) { |
| 700 | ret = -1; |
| 701 | goto end; |
| 702 | } |
| 703 | |
| 704 | if (len > stream->mmap_size) { |
| 705 | uint64_t new_size; |
| 706 | |
| 707 | new_size = max_t(uint64_t, len, stream->mmap_size << 1); |
| 708 | if (pos->base_mma) { |
| 709 | /* unmap old base */ |
| 710 | ret = munmap_align(pos->base_mma); |
| 711 | if (ret) { |
| 712 | perror("[error] Unable to unmap old base"); |
| 713 | ret = -1; |
| 714 | goto error; |
| 715 | } |
| 716 | pos->base_mma = NULL; |
| 717 | } |
| 718 | pos->base_mma = mmap_align(new_size, |
| 719 | PROT_READ | PROT_WRITE, |
| 720 | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); |
| 721 | if (pos->base_mma == MAP_FAILED) { |
| 722 | perror("[error] mmap error"); |
| 723 | pos->base_mma = NULL; |
| 724 | ret = -1; |
| 725 | goto error; |
| 726 | } |
| 727 | |
| 728 | stream->mmap_size = new_size; |
| 729 | printf_verbose("Expanding stream mmap size to %" PRIu64 " bytes\n", |
| 730 | stream->mmap_size); |
| 731 | } |
| 732 | |
| 733 | ret_len = lttng_live_recv(ctx->control_sock, |
| 734 | mmap_align_addr(pos->base_mma), len); |
| 735 | if (ret_len == 0) { |
| 736 | fprintf(stderr, "[error] Remote side has closed connection\n"); |
| 737 | ret = -1; |
| 738 | goto error; |
| 739 | } |
| 740 | if (ret_len < 0) { |
| 741 | perror("[error] Error receiving trace packet"); |
| 742 | ret = ret_len; |
| 743 | goto error; |
| 744 | } |
| 745 | assert(ret_len == len); |
| 746 | |
| 747 | end: |
| 748 | error: |
| 749 | return ret; |
| 750 | } |
| 751 | |
| 752 | static |
| 753 | int get_one_metadata_packet(struct lttng_live_ctx *ctx, |
| 754 | struct lttng_live_viewer_stream *metadata_stream) |
| 755 | { |
| 756 | uint64_t len = 0; |
| 757 | int ret; |
| 758 | struct lttng_viewer_cmd cmd; |
| 759 | struct lttng_viewer_get_metadata rq; |
| 760 | struct lttng_viewer_metadata_packet rp; |
| 761 | char *data = NULL; |
| 762 | ssize_t ret_len; |
| 763 | |
| 764 | rq.stream_id = htobe64(metadata_stream->id); |
| 765 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_METADATA); |
| 766 | cmd.data_size = sizeof(rq); |
| 767 | cmd.cmd_version = 0; |
| 768 | |
| 769 | ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd)); |
| 770 | if (ret_len < 0) { |
| 771 | perror("[error] Error sending cmd"); |
| 772 | ret = ret_len; |
| 773 | goto error; |
| 774 | } |
| 775 | assert(ret_len == sizeof(cmd)); |
| 776 | |
| 777 | ret_len = lttng_live_send(ctx->control_sock, &rq, sizeof(rq)); |
| 778 | if (ret_len < 0) { |
| 779 | perror("[error] Error sending get_metadata request"); |
| 780 | ret = ret_len; |
| 781 | goto error; |
| 782 | } |
| 783 | assert(ret_len == sizeof(rq)); |
| 784 | |
| 785 | ret_len = lttng_live_recv(ctx->control_sock, &rp, sizeof(rp)); |
| 786 | if (ret_len == 0) { |
| 787 | fprintf(stderr, "[error] Remote side has closed connection\n"); |
| 788 | ret = -1; |
| 789 | goto error; |
| 790 | } |
| 791 | if (ret_len < 0) { |
| 792 | perror("[error] Error receiving metadata response"); |
| 793 | ret = ret_len; |
| 794 | goto error; |
| 795 | } |
| 796 | assert(ret_len == sizeof(rp)); |
| 797 | |
| 798 | switch (be32toh(rp.status)) { |
| 799 | case LTTNG_VIEWER_METADATA_OK: |
| 800 | printf_verbose("get_metadata : OK\n"); |
| 801 | break; |
| 802 | case LTTNG_VIEWER_NO_NEW_METADATA: |
| 803 | printf_verbose("get_metadata : NO NEW\n"); |
| 804 | ret = 0; |
| 805 | goto end; |
| 806 | case LTTNG_VIEWER_METADATA_ERR: |
| 807 | printf_verbose("get_metadata : ERR\n"); |
| 808 | ret = -1; |
| 809 | goto end; |
| 810 | default: |
| 811 | printf_verbose("get_metadata : UNKNOWN\n"); |
| 812 | ret = -1; |
| 813 | goto end; |
| 814 | } |
| 815 | |
| 816 | len = be64toh(rp.len); |
| 817 | printf_verbose("Writing %" PRIu64" bytes to metadata\n", len); |
| 818 | if (len <= 0) { |
| 819 | ret = -1; |
| 820 | goto end; |
| 821 | } |
| 822 | |
| 823 | data = zmalloc(len); |
| 824 | if (!data) { |
| 825 | perror("relay data zmalloc"); |
| 826 | ret = -1; |
| 827 | goto error; |
| 828 | } |
| 829 | ret_len = lttng_live_recv(ctx->control_sock, data, len); |
| 830 | if (ret_len == 0) { |
| 831 | fprintf(stderr, "[error] Remote side has closed connection\n"); |
| 832 | ret = -1; |
| 833 | free(data); |
| 834 | goto error; |
| 835 | } |
| 836 | if (ret_len < 0) { |
| 837 | perror("[error] Error receiving trace packet"); |
| 838 | ret = ret_len; |
| 839 | free(data); |
| 840 | goto error; |
| 841 | } |
| 842 | assert(ret_len == len); |
| 843 | |
| 844 | do { |
| 845 | ret_len = fwrite(data, 1, len, |
| 846 | metadata_stream->metadata_fp_write); |
| 847 | } while (ret_len < 0 && errno == EINTR); |
| 848 | if (ret_len < 0) { |
| 849 | fprintf(stderr, "[error] Writing in the metadata fp\n"); |
| 850 | free(data); |
| 851 | ret = ret_len; |
| 852 | goto error; |
| 853 | } |
| 854 | assert(ret_len == len); |
| 855 | metadata_stream->metadata_len += len; |
| 856 | ret = len; |
| 857 | |
| 858 | free(data); |
| 859 | |
| 860 | end: |
| 861 | error: |
| 862 | return ret; |
| 863 | } |
| 864 | |
| 865 | /* |
| 866 | * Return 0 on success, a negative value on error. |
| 867 | */ |
| 868 | static |
| 869 | int get_new_metadata(struct lttng_live_ctx *ctx, |
| 870 | struct lttng_live_viewer_stream *viewer_stream, |
| 871 | char **metadata_buf) |
| 872 | { |
| 873 | int ret = 0; |
| 874 | struct lttng_live_viewer_stream *metadata_stream; |
| 875 | size_t size, len_read = 0;; |
| 876 | |
| 877 | metadata_stream = viewer_stream->ctf_trace->metadata_stream; |
| 878 | if (!metadata_stream) { |
| 879 | fprintf(stderr, "[error] No metadata stream\n"); |
| 880 | ret = -1; |
| 881 | goto error; |
| 882 | } |
| 883 | metadata_stream->metadata_len = 0; |
| 884 | ret = open_metadata_fp_write(metadata_stream, metadata_buf, &size); |
| 885 | if (ret < 0) { |
| 886 | goto error; |
| 887 | } |
| 888 | |
| 889 | do { |
| 890 | /* |
| 891 | * get_one_metadata_packet returns the number of bytes |
| 892 | * received, 0 when we have received everything, a |
| 893 | * negative value on error. |
| 894 | */ |
| 895 | ret = get_one_metadata_packet(ctx, metadata_stream); |
| 896 | if (ret > 0) { |
| 897 | len_read += ret; |
| 898 | } |
| 899 | if (!len_read) { |
| 900 | (void) poll(NULL, 0, ACTIVE_POLL_DELAY); |
| 901 | } |
| 902 | } while (ret > 0 || !len_read); |
| 903 | |
| 904 | if (fclose(metadata_stream->metadata_fp_write)) |
| 905 | perror("fclose"); |
| 906 | metadata_stream->metadata_fp_write = NULL; |
| 907 | |
| 908 | error: |
| 909 | return ret; |
| 910 | } |
| 911 | |
| 912 | /* |
| 913 | * Get one index for a stream. |
| 914 | * |
| 915 | * Returns 0 on success or a negative value on error. |
| 916 | */ |
| 917 | static |
| 918 | int get_next_index(struct lttng_live_ctx *ctx, |
| 919 | struct lttng_live_viewer_stream *viewer_stream, |
| 920 | struct packet_index *index) |
| 921 | { |
| 922 | struct lttng_viewer_cmd cmd; |
| 923 | struct lttng_viewer_get_next_index rq; |
| 924 | struct lttng_viewer_index rp; |
| 925 | int ret; |
| 926 | ssize_t ret_len; |
| 927 | |
| 928 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_NEXT_INDEX); |
| 929 | cmd.data_size = sizeof(rq); |
| 930 | cmd.cmd_version = 0; |
| 931 | |
| 932 | memset(&rq, 0, sizeof(rq)); |
| 933 | rq.stream_id = htobe64(viewer_stream->id); |
| 934 | |
| 935 | retry: |
| 936 | ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd)); |
| 937 | if (ret_len < 0) { |
| 938 | perror("[error] Error sending cmd"); |
| 939 | ret = ret_len; |
| 940 | goto error; |
| 941 | } |
| 942 | assert(ret_len == sizeof(cmd)); |
| 943 | |
| 944 | ret_len = lttng_live_send(ctx->control_sock, &rq, sizeof(rq)); |
| 945 | if (ret_len < 0) { |
| 946 | perror("[error] Error sending get_next_index request"); |
| 947 | ret = ret_len; |
| 948 | goto error; |
| 949 | } |
| 950 | assert(ret_len == sizeof(rq)); |
| 951 | |
| 952 | ret_len = lttng_live_recv(ctx->control_sock, &rp, sizeof(rp)); |
| 953 | if (ret_len == 0) { |
| 954 | fprintf(stderr, "[error] Remote side has closed connection\n"); |
| 955 | ret = -1; |
| 956 | goto error; |
| 957 | } |
| 958 | if (ret_len < 0) { |
| 959 | perror("[error] Error receiving index response"); |
| 960 | ret = ret_len; |
| 961 | goto error; |
| 962 | } |
| 963 | assert(ret_len == sizeof(rp)); |
| 964 | |
| 965 | rp.flags = be32toh(rp.flags); |
| 966 | |
| 967 | switch (be32toh(rp.status)) { |
| 968 | case LTTNG_VIEWER_INDEX_INACTIVE: |
| 969 | printf_verbose("get_next_index: inactive\n"); |
| 970 | memset(index, 0, sizeof(struct packet_index)); |
| 971 | index->ts_cycles.timestamp_end = be64toh(rp.timestamp_end); |
| 972 | break; |
| 973 | case LTTNG_VIEWER_INDEX_OK: |
| 974 | printf_verbose("get_next_index: Ok, need metadata update : %u\n", |
| 975 | rp.flags & LTTNG_VIEWER_FLAG_NEW_METADATA); |
| 976 | index->offset = be64toh(rp.offset); |
| 977 | index->packet_size = be64toh(rp.packet_size); |
| 978 | index->content_size = be64toh(rp.content_size); |
| 979 | index->ts_cycles.timestamp_begin = be64toh(rp.timestamp_begin); |
| 980 | index->ts_cycles.timestamp_end = be64toh(rp.timestamp_end); |
| 981 | index->events_discarded = be64toh(rp.events_discarded); |
| 982 | |
| 983 | if (rp.flags & LTTNG_VIEWER_FLAG_NEW_METADATA) { |
| 984 | ret = append_metadata(ctx, viewer_stream); |
| 985 | if (ret) |
| 986 | goto error; |
| 987 | } |
| 988 | if (rp.flags & LTTNG_VIEWER_FLAG_NEW_STREAM) { |
| 989 | ret = ask_new_streams(ctx); |
| 990 | if (ret < 0) |
| 991 | goto error; |
| 992 | g_hash_table_foreach(ctx->session->ctf_traces, add_traces, |
| 993 | ctx->bt_ctx); |
| 994 | } |
| 995 | break; |
| 996 | case LTTNG_VIEWER_INDEX_RETRY: |
| 997 | printf_verbose("get_next_index: retry\n"); |
| 998 | (void) poll(NULL, 0, ACTIVE_POLL_DELAY); |
| 999 | goto retry; |
| 1000 | case LTTNG_VIEWER_INDEX_HUP: |
| 1001 | printf_verbose("get_next_index: stream hung up\n"); |
| 1002 | viewer_stream->id = -1ULL; |
| 1003 | index->offset = EOF; |
| 1004 | ctx->session->stream_count--; |
| 1005 | break; |
| 1006 | case LTTNG_VIEWER_INDEX_ERR: |
| 1007 | fprintf(stderr, "[error] get_next_index: error\n"); |
| 1008 | ret = -1; |
| 1009 | goto error; |
| 1010 | default: |
| 1011 | fprintf(stderr, "[error] get_next_index: unkwown value\n"); |
| 1012 | ret = -1; |
| 1013 | goto error; |
| 1014 | } |
| 1015 | |
| 1016 | ret = 0; |
| 1017 | |
| 1018 | error: |
| 1019 | return ret; |
| 1020 | } |
| 1021 | |
| 1022 | static |
| 1023 | void ctf_live_packet_seek(struct bt_stream_pos *stream_pos, size_t index, |
| 1024 | int whence) |
| 1025 | { |
| 1026 | struct ctf_stream_pos *pos; |
| 1027 | struct ctf_file_stream *file_stream; |
| 1028 | struct packet_index *prev_index = NULL, *cur_index; |
| 1029 | struct lttng_live_viewer_stream *viewer_stream; |
| 1030 | struct lttng_live_session *session; |
| 1031 | int ret; |
| 1032 | |
| 1033 | retry: |
| 1034 | pos = ctf_pos(stream_pos); |
| 1035 | file_stream = container_of(pos, struct ctf_file_stream, pos); |
| 1036 | viewer_stream = (struct lttng_live_viewer_stream *) pos->priv; |
| 1037 | session = viewer_stream->session; |
| 1038 | |
| 1039 | switch (pos->packet_index->len) { |
| 1040 | case 0: |
| 1041 | g_array_set_size(pos->packet_index, 1); |
| 1042 | cur_index = &g_array_index(pos->packet_index, |
| 1043 | struct packet_index, 0); |
| 1044 | break; |
| 1045 | case 1: |
| 1046 | g_array_set_size(pos->packet_index, 2); |
| 1047 | prev_index = &g_array_index(pos->packet_index, |
| 1048 | struct packet_index, 0); |
| 1049 | cur_index = &g_array_index(pos->packet_index, |
| 1050 | struct packet_index, 1); |
| 1051 | break; |
| 1052 | case 2: |
| 1053 | g_array_index(pos->packet_index, |
| 1054 | struct packet_index, 0) = |
| 1055 | g_array_index(pos->packet_index, |
| 1056 | struct packet_index, 1); |
| 1057 | prev_index = &g_array_index(pos->packet_index, |
| 1058 | struct packet_index, 0); |
| 1059 | cur_index = &g_array_index(pos->packet_index, |
| 1060 | struct packet_index, 1); |
| 1061 | break; |
| 1062 | default: |
| 1063 | abort(); |
| 1064 | break; |
| 1065 | } |
| 1066 | printf_verbose("get_next_index for stream %" PRIu64 "\n", viewer_stream->id); |
| 1067 | ret = get_next_index(session->ctx, viewer_stream, cur_index); |
| 1068 | if (ret < 0) { |
| 1069 | pos->offset = EOF; |
| 1070 | fprintf(stderr, "[error] get_next_index failed\n"); |
| 1071 | return; |
| 1072 | } |
| 1073 | |
| 1074 | pos->packet_size = cur_index->packet_size; |
| 1075 | pos->content_size = cur_index->content_size; |
| 1076 | pos->mmap_base_offset = 0; |
| 1077 | if (cur_index->offset == EOF) { |
| 1078 | pos->offset = EOF; |
| 1079 | } else { |
| 1080 | pos->offset = 0; |
| 1081 | } |
| 1082 | |
| 1083 | if (cur_index->content_size == 0) { |
| 1084 | file_stream->parent.cycles_timestamp = |
| 1085 | cur_index->ts_cycles.timestamp_end; |
| 1086 | file_stream->parent.real_timestamp = ctf_get_real_timestamp( |
| 1087 | &file_stream->parent, |
| 1088 | cur_index->ts_cycles.timestamp_end); |
| 1089 | } else { |
| 1090 | /* Convert the timestamps and append to the real_index. */ |
| 1091 | cur_index->ts_real.timestamp_begin = ctf_get_real_timestamp( |
| 1092 | &file_stream->parent, |
| 1093 | cur_index->ts_cycles.timestamp_begin); |
| 1094 | cur_index->ts_real.timestamp_end = ctf_get_real_timestamp( |
| 1095 | &file_stream->parent, |
| 1096 | cur_index->ts_cycles.timestamp_end); |
| 1097 | |
| 1098 | ctf_update_current_packet_index(&file_stream->parent, |
| 1099 | prev_index, cur_index); |
| 1100 | |
| 1101 | file_stream->parent.cycles_timestamp = |
| 1102 | cur_index->ts_cycles.timestamp_begin; |
| 1103 | file_stream->parent.real_timestamp = |
| 1104 | cur_index->ts_real.timestamp_begin; |
| 1105 | } |
| 1106 | |
| 1107 | if (pos->packet_size == 0 || pos->offset == EOF) { |
| 1108 | goto end; |
| 1109 | } |
| 1110 | |
| 1111 | printf_verbose("get_data_packet for stream %" PRIu64 "\n", |
| 1112 | viewer_stream->id); |
| 1113 | ret = get_data_packet(session->ctx, pos, viewer_stream, |
| 1114 | be64toh(cur_index->offset), |
| 1115 | cur_index->packet_size / CHAR_BIT); |
| 1116 | if (ret == -2) { |
| 1117 | goto retry; |
| 1118 | } else if (ret < 0) { |
| 1119 | pos->offset = EOF; |
| 1120 | fprintf(stderr, "[error] get_data_packet failed\n"); |
| 1121 | return; |
| 1122 | } |
| 1123 | |
| 1124 | printf_verbose("Index received : packet_size : %" PRIu64 |
| 1125 | ", offset %" PRIu64 ", content_size %" PRIu64 |
| 1126 | ", timestamp_end : %" PRIu64 "\n", |
| 1127 | cur_index->packet_size, cur_index->offset, |
| 1128 | cur_index->content_size, |
| 1129 | cur_index->ts_cycles.timestamp_end); |
| 1130 | |
| 1131 | /* update trace_packet_header and stream_packet_context */ |
| 1132 | if (pos->prot != PROT_WRITE && file_stream->parent.trace_packet_header) { |
| 1133 | /* Read packet header */ |
| 1134 | ret = generic_rw(&pos->parent, &file_stream->parent.trace_packet_header->p); |
| 1135 | if (ret) { |
| 1136 | pos->offset = EOF; |
| 1137 | fprintf(stderr, "[error] trace packet header read failed\n"); |
| 1138 | goto end; |
| 1139 | } |
| 1140 | } |
| 1141 | if (pos->prot != PROT_WRITE && file_stream->parent.stream_packet_context) { |
| 1142 | /* Read packet context */ |
| 1143 | ret = generic_rw(&pos->parent, &file_stream->parent.stream_packet_context->p); |
| 1144 | if (ret) { |
| 1145 | pos->offset = EOF; |
| 1146 | fprintf(stderr, "[error] stream packet context read failed\n"); |
| 1147 | goto end; |
| 1148 | } |
| 1149 | } |
| 1150 | pos->data_offset = pos->offset; |
| 1151 | |
| 1152 | end: |
| 1153 | return; |
| 1154 | } |
| 1155 | |
| 1156 | int lttng_live_create_viewer_session(struct lttng_live_ctx *ctx) |
| 1157 | { |
| 1158 | struct lttng_viewer_cmd cmd; |
| 1159 | struct lttng_viewer_create_session_response resp; |
| 1160 | int ret; |
| 1161 | ssize_t ret_len; |
| 1162 | |
| 1163 | cmd.cmd = htobe32(LTTNG_VIEWER_CREATE_SESSION); |
| 1164 | cmd.data_size = 0; |
| 1165 | cmd.cmd_version = 0; |
| 1166 | |
| 1167 | ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd)); |
| 1168 | if (ret_len < 0) { |
| 1169 | perror("[error] Error sending cmd"); |
| 1170 | ret = ret_len; |
| 1171 | goto error; |
| 1172 | } |
| 1173 | assert(ret_len == sizeof(cmd)); |
| 1174 | |
| 1175 | ret_len = lttng_live_recv(ctx->control_sock, &resp, sizeof(resp)); |
| 1176 | if (ret_len == 0) { |
| 1177 | fprintf(stderr, "[error] Remote side has closed connection\n"); |
| 1178 | ret = -1; |
| 1179 | goto error; |
| 1180 | } |
| 1181 | if (ret_len < 0) { |
| 1182 | perror("[error] Error receiving create session reply"); |
| 1183 | ret = ret_len; |
| 1184 | goto error; |
| 1185 | } |
| 1186 | assert(ret_len == sizeof(resp)); |
| 1187 | |
| 1188 | if (be32toh(resp.status) != LTTNG_VIEWER_CREATE_SESSION_OK) { |
| 1189 | fprintf(stderr, "[error] Error creating viewer session\n"); |
| 1190 | ret = -1; |
| 1191 | goto error; |
| 1192 | } |
| 1193 | ret = 0; |
| 1194 | |
| 1195 | error: |
| 1196 | return ret; |
| 1197 | } |
| 1198 | |
| 1199 | static |
| 1200 | int del_traces(gpointer key, gpointer value, gpointer user_data) |
| 1201 | { |
| 1202 | struct bt_context *bt_ctx = user_data; |
| 1203 | struct lttng_live_ctf_trace *trace = value; |
| 1204 | int ret; |
| 1205 | |
| 1206 | ret = bt_context_remove_trace(bt_ctx, trace->trace_id); |
| 1207 | if (ret < 0) |
| 1208 | fprintf(stderr, "[error] removing trace from context\n"); |
| 1209 | |
| 1210 | /* remove the key/value pair from the HT. */ |
| 1211 | return 1; |
| 1212 | } |
| 1213 | |
| 1214 | static |
| 1215 | void add_traces(gpointer key, gpointer value, gpointer user_data) |
| 1216 | { |
| 1217 | int i, ret; |
| 1218 | struct bt_context *bt_ctx = user_data; |
| 1219 | struct lttng_live_ctf_trace *trace = value; |
| 1220 | struct lttng_live_viewer_stream *stream; |
| 1221 | struct bt_mmap_stream *new_mmap_stream; |
| 1222 | struct bt_mmap_stream_list mmap_list; |
| 1223 | struct lttng_live_ctx *ctx = NULL; |
| 1224 | struct bt_trace_descriptor *td; |
| 1225 | struct bt_trace_handle *handle; |
| 1226 | |
| 1227 | /* |
| 1228 | * We don't know how many streams we will receive for a trace, so |
| 1229 | * once we are done receiving the traces, we add all the traces |
| 1230 | * received to the bt_context. |
| 1231 | * We can receive streams during the attach command or the |
| 1232 | * get_new_streams, so we have to make sure not to add multiple |
| 1233 | * times the same traces. |
| 1234 | * If a trace is already in the context, we just skip this function. |
| 1235 | */ |
| 1236 | if (trace->in_use) |
| 1237 | return; |
| 1238 | |
| 1239 | BT_INIT_LIST_HEAD(&mmap_list.head); |
| 1240 | |
| 1241 | for (i = 0; i < trace->streams->len; i++) { |
| 1242 | stream = g_ptr_array_index(trace->streams, i); |
| 1243 | ctx = stream->session->ctx; |
| 1244 | |
| 1245 | if (!stream->metadata_flag) { |
| 1246 | new_mmap_stream = zmalloc(sizeof(struct bt_mmap_stream)); |
| 1247 | new_mmap_stream->priv = (void *) stream; |
| 1248 | new_mmap_stream->fd = -1; |
| 1249 | bt_list_add(&new_mmap_stream->list, &mmap_list.head); |
| 1250 | } else { |
| 1251 | char *metadata_buf = NULL; |
| 1252 | |
| 1253 | /* Get all possible metadata before starting */ |
| 1254 | ret = get_new_metadata(ctx, stream, &metadata_buf); |
| 1255 | if (ret) { |
| 1256 | free(metadata_buf); |
| 1257 | goto end_free; |
| 1258 | } |
| 1259 | if (!stream->metadata_len) { |
| 1260 | fprintf(stderr, "[error] empty metadata\n"); |
| 1261 | ret = -1; |
| 1262 | free(metadata_buf); |
| 1263 | goto end_free; |
| 1264 | } |
| 1265 | |
| 1266 | trace->metadata_fp = babeltrace_fmemopen(metadata_buf, |
| 1267 | stream->metadata_len, "rb"); |
| 1268 | if (!trace->metadata_fp) { |
| 1269 | perror("Metadata fmemopen"); |
| 1270 | ret = -1; |
| 1271 | free(metadata_buf); |
| 1272 | goto end_free; |
| 1273 | } |
| 1274 | } |
| 1275 | } |
| 1276 | |
| 1277 | if (!trace->metadata_fp) { |
| 1278 | fprintf(stderr, "[error] No metadata stream opened\n"); |
| 1279 | goto end_free; |
| 1280 | } |
| 1281 | |
| 1282 | ret = bt_context_add_trace(bt_ctx, NULL, "ctf", |
| 1283 | ctf_live_packet_seek, &mmap_list, trace->metadata_fp); |
| 1284 | if (ret < 0) { |
| 1285 | fprintf(stderr, "[error] Error adding trace\n"); |
| 1286 | goto end_free; |
| 1287 | } |
| 1288 | trace->metadata_stream->metadata_len = 0; |
| 1289 | |
| 1290 | handle = (struct bt_trace_handle *) g_hash_table_lookup( |
| 1291 | bt_ctx->trace_handles, |
| 1292 | (gpointer) (unsigned long) ret); |
| 1293 | td = handle->td; |
| 1294 | trace->handle = handle; |
| 1295 | if (bt_ctx->current_iterator) { |
| 1296 | bt_iter_add_trace(bt_ctx->current_iterator, td); |
| 1297 | } |
| 1298 | |
| 1299 | trace->trace_id = ret; |
| 1300 | trace->in_use = 1; |
| 1301 | |
| 1302 | goto end; |
| 1303 | |
| 1304 | end_free: |
| 1305 | bt_context_put(bt_ctx); |
| 1306 | end: |
| 1307 | return; |
| 1308 | } |
| 1309 | |
| 1310 | int lttng_live_get_new_streams(struct lttng_live_ctx *ctx, uint64_t id) |
| 1311 | { |
| 1312 | struct lttng_viewer_cmd cmd; |
| 1313 | struct lttng_viewer_new_streams_request rq; |
| 1314 | struct lttng_viewer_new_streams_response rp; |
| 1315 | struct lttng_viewer_stream stream; |
| 1316 | int ret, i; |
| 1317 | ssize_t ret_len; |
| 1318 | uint32_t stream_count; |
| 1319 | |
| 1320 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_NEW_STREAMS); |
| 1321 | cmd.data_size = sizeof(rq); |
| 1322 | cmd.cmd_version = 0; |
| 1323 | |
| 1324 | memset(&rq, 0, sizeof(rq)); |
| 1325 | rq.session_id = htobe64(id); |
| 1326 | |
| 1327 | ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd)); |
| 1328 | if (ret_len < 0) { |
| 1329 | perror("[error] Error sending cmd"); |
| 1330 | ret = ret_len; |
| 1331 | goto error; |
| 1332 | } |
| 1333 | assert(ret_len == sizeof(cmd)); |
| 1334 | |
| 1335 | ret_len = lttng_live_send(ctx->control_sock, &rq, sizeof(rq)); |
| 1336 | if (ret_len < 0) { |
| 1337 | perror("[error] Error sending get_new_streams request"); |
| 1338 | ret = ret_len; |
| 1339 | goto error; |
| 1340 | } |
| 1341 | assert(ret_len == sizeof(rq)); |
| 1342 | |
| 1343 | ret_len = lttng_live_recv(ctx->control_sock, &rp, sizeof(rp)); |
| 1344 | if (ret_len == 0) { |
| 1345 | fprintf(stderr, "[error] Remote side has closed connection\n"); |
| 1346 | ret = -1; |
| 1347 | goto error; |
| 1348 | } |
| 1349 | if (ret_len < 0) { |
| 1350 | perror("[error] Error receiving get_new_streams response"); |
| 1351 | ret = ret_len; |
| 1352 | goto error; |
| 1353 | } |
| 1354 | assert(ret_len == sizeof(rp)); |
| 1355 | |
| 1356 | switch(be32toh(rp.status)) { |
| 1357 | case LTTNG_VIEWER_NEW_STREAMS_OK: |
| 1358 | break; |
| 1359 | case LTTNG_VIEWER_NEW_STREAMS_NO_NEW: |
| 1360 | ret = 0; |
| 1361 | goto end; |
| 1362 | case LTTNG_VIEWER_NEW_STREAMS_HUP: |
| 1363 | ret = -LTTNG_VIEWER_NEW_STREAMS_HUP; |
| 1364 | goto end; |
| 1365 | case LTTNG_VIEWER_NEW_STREAMS_ERR: |
| 1366 | fprintf(stderr, "[error] get_new_streams error\n"); |
| 1367 | ret = -1; |
| 1368 | goto end; |
| 1369 | default: |
| 1370 | fprintf(stderr, "[error] Unknown return code %u\n", |
| 1371 | be32toh(rp.status)); |
| 1372 | ret = -1; |
| 1373 | goto end; |
| 1374 | } |
| 1375 | |
| 1376 | stream_count = be32toh(rp.streams_count); |
| 1377 | ctx->session->stream_count += stream_count; |
| 1378 | /* |
| 1379 | * When the session is created but not started, we do an active wait |
| 1380 | * until it starts. It allows the viewer to start processing the trace |
| 1381 | * as soon as the session starts. |
| 1382 | */ |
| 1383 | if (ctx->session->stream_count == 0) { |
| 1384 | ret = 0; |
| 1385 | goto end; |
| 1386 | } |
| 1387 | printf_verbose("Waiting for %" PRIu64 " streams:\n", |
| 1388 | ctx->session->stream_count); |
| 1389 | ctx->session->streams = g_new0(struct lttng_live_viewer_stream, |
| 1390 | ctx->session->stream_count); |
| 1391 | for (i = 0; i < stream_count; i++) { |
| 1392 | ret_len = lttng_live_recv(ctx->control_sock, &stream, sizeof(stream)); |
| 1393 | if (ret_len == 0) { |
| 1394 | fprintf(stderr, "[error] Remote side has closed connection\n"); |
| 1395 | ret = -1; |
| 1396 | goto error; |
| 1397 | } |
| 1398 | if (ret_len < 0) { |
| 1399 | perror("[error] Error receiving stream"); |
| 1400 | ret = ret_len; |
| 1401 | goto error; |
| 1402 | } |
| 1403 | assert(ret_len == sizeof(stream)); |
| 1404 | stream.path_name[LTTNG_VIEWER_PATH_MAX - 1] = '\0'; |
| 1405 | stream.channel_name[LTTNG_VIEWER_NAME_MAX - 1] = '\0'; |
| 1406 | |
| 1407 | printf_verbose(" stream %" PRIu64 " : %s/%s\n", |
| 1408 | be64toh(stream.id), stream.path_name, |
| 1409 | stream.channel_name); |
| 1410 | ctx->session->streams[i].id = be64toh(stream.id); |
| 1411 | ctx->session->streams[i].session = ctx->session; |
| 1412 | |
| 1413 | ctx->session->streams[i].first_read = 1; |
| 1414 | ctx->session->streams[i].mmap_size = 0; |
| 1415 | |
| 1416 | if (be32toh(stream.metadata_flag)) { |
| 1417 | ctx->session->streams[i].metadata_flag = 1; |
| 1418 | } |
| 1419 | ret = lttng_live_ctf_trace_assign(&ctx->session->streams[i], |
| 1420 | be64toh(stream.ctf_trace_id)); |
| 1421 | if (ret < 0) { |
| 1422 | goto error; |
| 1423 | } |
| 1424 | |
| 1425 | } |
| 1426 | ret = 0; |
| 1427 | |
| 1428 | end: |
| 1429 | error: |
| 1430 | return ret; |
| 1431 | } |
| 1432 | |
| 1433 | void lttng_live_read(struct lttng_live_ctx *ctx) |
| 1434 | { |
| 1435 | int ret, i; |
| 1436 | struct bt_ctf_iter *iter; |
| 1437 | const struct bt_ctf_event *event; |
| 1438 | struct bt_iter_pos begin_pos; |
| 1439 | struct bt_trace_descriptor *td_write; |
| 1440 | struct bt_format *fmt_write; |
| 1441 | struct ctf_text_stream_pos *sout; |
| 1442 | uint64_t id; |
| 1443 | |
| 1444 | ctx->bt_ctx = bt_context_create(); |
| 1445 | if (!ctx->bt_ctx) { |
| 1446 | fprintf(stderr, "[error] bt_context_create allocation\n"); |
| 1447 | goto end; |
| 1448 | } |
| 1449 | |
| 1450 | fmt_write = bt_lookup_format(g_quark_from_static_string("text")); |
| 1451 | if (!fmt_write) { |
| 1452 | fprintf(stderr, "[error] ctf-text error\n"); |
| 1453 | goto end; |
| 1454 | } |
| 1455 | |
| 1456 | td_write = fmt_write->open_trace(NULL, O_RDWR, NULL, NULL); |
| 1457 | if (!td_write) { |
| 1458 | fprintf(stderr, "[error] Error opening output trace\n"); |
| 1459 | goto end_free; |
| 1460 | } |
| 1461 | |
| 1462 | sout = container_of(td_write, struct ctf_text_stream_pos, |
| 1463 | trace_descriptor); |
| 1464 | if (!sout->parent.event_cb) |
| 1465 | goto end_free; |
| 1466 | |
| 1467 | ret = lttng_live_create_viewer_session(ctx); |
| 1468 | if (ret < 0) { |
| 1469 | goto end_free; |
| 1470 | } |
| 1471 | |
| 1472 | for (i = 0; i < ctx->session_ids->len; i++) { |
| 1473 | id = g_array_index(ctx->session_ids, uint64_t, i); |
| 1474 | printf_verbose("Attaching to session %lu\n", id); |
| 1475 | ret = lttng_live_attach_session(ctx, id); |
| 1476 | printf_verbose("Attaching session returns %d\n", ret); |
| 1477 | if (ret < 0) { |
| 1478 | if (ret == -LTTNG_VIEWER_ATTACH_UNK) { |
| 1479 | fprintf(stderr, "[error] Unknown session ID\n"); |
| 1480 | } |
| 1481 | goto end_free; |
| 1482 | } |
| 1483 | } |
| 1484 | |
| 1485 | /* |
| 1486 | * As long as the session is active, we try to get new streams. |
| 1487 | */ |
| 1488 | for (;;) { |
| 1489 | int flags; |
| 1490 | |
| 1491 | while (!ctx->session->stream_count) { |
| 1492 | if (ctx->session_ids->len == 0) |
| 1493 | goto end_free; |
| 1494 | ret = ask_new_streams(ctx); |
| 1495 | if (ret < 0) |
| 1496 | goto end_free; |
| 1497 | if (!ctx->session->stream_count) |
| 1498 | (void) poll(NULL, 0, ACTIVE_POLL_DELAY); |
| 1499 | } |
| 1500 | |
| 1501 | g_hash_table_foreach(ctx->session->ctf_traces, add_traces, |
| 1502 | ctx->bt_ctx); |
| 1503 | |
| 1504 | begin_pos.type = BT_SEEK_BEGIN; |
| 1505 | iter = bt_ctf_iter_create(ctx->bt_ctx, &begin_pos, NULL); |
| 1506 | if (!iter) { |
| 1507 | fprintf(stderr, "[error] Iterator creation error\n"); |
| 1508 | goto end; |
| 1509 | } |
| 1510 | for (;;) { |
| 1511 | event = bt_ctf_iter_read_event_flags(iter, &flags); |
| 1512 | if (!(flags & BT_ITER_FLAG_RETRY)) { |
| 1513 | if (!event) { |
| 1514 | /* End of trace */ |
| 1515 | break; |
| 1516 | } |
| 1517 | ret = sout->parent.event_cb(&sout->parent, |
| 1518 | event->parent->stream); |
| 1519 | if (ret) { |
| 1520 | fprintf(stderr, "[error] Writing " |
| 1521 | "event failed.\n"); |
| 1522 | goto end_free; |
| 1523 | } |
| 1524 | } |
| 1525 | ret = bt_iter_next(bt_ctf_get_iter(iter)); |
| 1526 | if (ret < 0) { |
| 1527 | goto end_free; |
| 1528 | } |
| 1529 | } |
| 1530 | bt_ctf_iter_destroy(iter); |
| 1531 | g_hash_table_foreach_remove(ctx->session->ctf_traces, |
| 1532 | del_traces, ctx->bt_ctx); |
| 1533 | ctx->session->stream_count = 0; |
| 1534 | } |
| 1535 | |
| 1536 | end_free: |
| 1537 | bt_context_put(ctx->bt_ctx); |
| 1538 | end: |
| 1539 | return; |
| 1540 | } |