| 1 | /* |
| 2 | * SPDX-License-Identifier: MIT |
| 3 | * |
| 4 | * Copyright 2019 Francis Deslauriers <francis.deslauriers@efficios.com> |
| 5 | * Copyright 2016 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
| 6 | */ |
| 7 | |
| 8 | #define BT_CLOG_CFG (logCfg) |
| 9 | #define BT_LOG_TAG "PLUGIN/SRC.CTF.LTTNG-LIVE/VIEWER" |
| 10 | |
| 11 | #include <fcntl.h> |
| 12 | #include <stdbool.h> |
| 13 | #include <stdint.h> |
| 14 | #include <stdio.h> |
| 15 | #include <stdlib.h> |
| 16 | #include <sys/types.h> |
| 17 | #include <unistd.h> |
| 18 | |
| 19 | #include <glib.h> |
| 20 | |
| 21 | #include "compat/socket.h" |
| 22 | #include "compat/endian.h" |
| 23 | #include "compat/compiler.h" |
| 24 | #include "common/common.h" |
| 25 | #include <babeltrace2/babeltrace.h> |
| 26 | |
| 27 | #include "lttng-live.hpp" |
| 28 | #include "viewer-connection.hpp" |
| 29 | #include "lttng-viewer-abi.hpp" |
| 30 | #include "data-stream.hpp" |
| 31 | #include "metadata.hpp" |
| 32 | #include "cpp-common/cfg-logging-error-reporting.hpp" |
| 33 | |
| 34 | #define viewer_handle_send_recv_status(_logCfg, _status, _action, _msg_str) \ |
| 35 | do { \ |
| 36 | switch (_status) { \ |
| 37 | case LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED: \ |
| 38 | break; \ |
| 39 | case LTTNG_LIVE_VIEWER_STATUS_ERROR: \ |
| 40 | BT_CLOGE_APPEND_CAUSE("Error " _action " " _msg_str); \ |
| 41 | break; \ |
| 42 | default: \ |
| 43 | bt_common_abort(); \ |
| 44 | } \ |
| 45 | } while (0) |
| 46 | |
| 47 | #define viewer_handle_send_status(_logCfg, _status, _msg_str) \ |
| 48 | viewer_handle_send_recv_status(_logCfg, _status, "sending", _msg_str) |
| 49 | |
| 50 | #define viewer_handle_recv_status(_logCfg, _status, _msg_str) \ |
| 51 | viewer_handle_send_recv_status(_logCfg, _status, "receiving", _msg_str) |
| 52 | |
| 53 | #define LTTNG_LIVE_CLOGE_APPEND_CAUSE_ERRNO(_msg, _fmt, ...) \ |
| 54 | do { \ |
| 55 | BT_CLOGE_APPEND_CAUSE(_msg ": %s" _fmt, bt_socket_errormsg(), ##__VA_ARGS__); \ |
| 56 | } while (0) |
| 57 | |
| 58 | static const char *lttng_viewer_command_string(enum lttng_viewer_command cmd) |
| 59 | { |
| 60 | switch (cmd) { |
| 61 | case LTTNG_VIEWER_CONNECT: |
| 62 | return "CONNECT"; |
| 63 | case LTTNG_VIEWER_LIST_SESSIONS: |
| 64 | return "LIST_SESSIONS"; |
| 65 | case LTTNG_VIEWER_ATTACH_SESSION: |
| 66 | return "ATTACH_SESSION"; |
| 67 | case LTTNG_VIEWER_GET_NEXT_INDEX: |
| 68 | return "GET_NEXT_INDEX"; |
| 69 | case LTTNG_VIEWER_GET_PACKET: |
| 70 | return "GET_PACKET"; |
| 71 | case LTTNG_VIEWER_GET_METADATA: |
| 72 | return "GET_METADATA"; |
| 73 | case LTTNG_VIEWER_GET_NEW_STREAMS: |
| 74 | return "GET_NEW_STREAMS"; |
| 75 | case LTTNG_VIEWER_CREATE_SESSION: |
| 76 | return "CREATE_SESSION"; |
| 77 | case LTTNG_VIEWER_DETACH_SESSION: |
| 78 | return "DETACH_SESSION"; |
| 79 | } |
| 80 | |
| 81 | bt_common_abort(); |
| 82 | } |
| 83 | |
| 84 | static const char * |
| 85 | lttng_viewer_next_index_return_code_string(enum lttng_viewer_next_index_return_code code) |
| 86 | { |
| 87 | switch (code) { |
| 88 | case LTTNG_VIEWER_INDEX_OK: |
| 89 | return "INDEX_OK"; |
| 90 | case LTTNG_VIEWER_INDEX_RETRY: |
| 91 | return "INDEX_RETRY"; |
| 92 | case LTTNG_VIEWER_INDEX_HUP: |
| 93 | return "INDEX_HUP"; |
| 94 | case LTTNG_VIEWER_INDEX_ERR: |
| 95 | return "INDEX_ERR"; |
| 96 | case LTTNG_VIEWER_INDEX_INACTIVE: |
| 97 | return "INDEX_INACTIVE"; |
| 98 | case LTTNG_VIEWER_INDEX_EOF: |
| 99 | return "INDEX_EOF"; |
| 100 | } |
| 101 | |
| 102 | bt_common_abort(); |
| 103 | } |
| 104 | |
| 105 | static const char *lttng_viewer_next_index_return_code_string(uint32_t code) |
| 106 | { |
| 107 | return lttng_viewer_next_index_return_code_string((lttng_viewer_next_index_return_code) code); |
| 108 | } |
| 109 | |
| 110 | static const char * |
| 111 | lttng_viewer_get_packet_return_code_string(enum lttng_viewer_get_packet_return_code code) |
| 112 | { |
| 113 | switch (code) { |
| 114 | case LTTNG_VIEWER_GET_PACKET_OK: |
| 115 | return "GET_PACKET_OK"; |
| 116 | case LTTNG_VIEWER_GET_PACKET_RETRY: |
| 117 | return "GET_PACKET_RETRY"; |
| 118 | case LTTNG_VIEWER_GET_PACKET_ERR: |
| 119 | return "GET_PACKET_ERR"; |
| 120 | case LTTNG_VIEWER_GET_PACKET_EOF: |
| 121 | return "GET_PACKET_EOF"; |
| 122 | } |
| 123 | |
| 124 | bt_common_abort(); |
| 125 | }; |
| 126 | |
| 127 | static const char *lttng_viewer_get_packet_return_code_string(uint32_t code) |
| 128 | { |
| 129 | return lttng_viewer_get_packet_return_code_string((lttng_viewer_get_packet_return_code) code); |
| 130 | } |
| 131 | |
| 132 | static const char *lttng_viewer_seek_string(enum lttng_viewer_seek seek) |
| 133 | { |
| 134 | switch (seek) { |
| 135 | case LTTNG_VIEWER_SEEK_BEGINNING: |
| 136 | return "SEEK_BEGINNING"; |
| 137 | case LTTNG_VIEWER_SEEK_LAST: |
| 138 | return "SEEK_LAST"; |
| 139 | } |
| 140 | |
| 141 | bt_common_abort(); |
| 142 | } |
| 143 | |
| 144 | static inline enum lttng_live_iterator_status |
| 145 | viewer_status_to_live_iterator_status(enum lttng_live_viewer_status viewer_status) |
| 146 | { |
| 147 | switch (viewer_status) { |
| 148 | case LTTNG_LIVE_VIEWER_STATUS_OK: |
| 149 | return LTTNG_LIVE_ITERATOR_STATUS_OK; |
| 150 | case LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED: |
| 151 | return LTTNG_LIVE_ITERATOR_STATUS_AGAIN; |
| 152 | case LTTNG_LIVE_VIEWER_STATUS_ERROR: |
| 153 | return LTTNG_LIVE_ITERATOR_STATUS_ERROR; |
| 154 | } |
| 155 | |
| 156 | bt_common_abort(); |
| 157 | } |
| 158 | |
| 159 | static inline enum ctf_msg_iter_medium_status |
| 160 | viewer_status_to_ctf_msg_iter_medium_status(enum lttng_live_viewer_status viewer_status) |
| 161 | { |
| 162 | switch (viewer_status) { |
| 163 | case LTTNG_LIVE_VIEWER_STATUS_OK: |
| 164 | return CTF_MSG_ITER_MEDIUM_STATUS_OK; |
| 165 | case LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED: |
| 166 | return CTF_MSG_ITER_MEDIUM_STATUS_AGAIN; |
| 167 | case LTTNG_LIVE_VIEWER_STATUS_ERROR: |
| 168 | return CTF_MSG_ITER_MEDIUM_STATUS_ERROR; |
| 169 | } |
| 170 | |
| 171 | bt_common_abort(); |
| 172 | } |
| 173 | |
| 174 | static inline void viewer_connection_close_socket(struct live_viewer_connection *viewer_connection) |
| 175 | { |
| 176 | int ret = bt_socket_close(viewer_connection->control_sock); |
| 177 | if (ret == -1) { |
| 178 | const bt2_common::LogCfg& logCfg = viewer_connection->logCfg; |
| 179 | BT_CLOGW_ERRNO("Error closing viewer connection socket: ", "."); |
| 180 | } |
| 181 | |
| 182 | viewer_connection->control_sock = BT_INVALID_SOCKET; |
| 183 | } |
| 184 | |
| 185 | /* |
| 186 | * This function receives a message from the Relay daemon. |
| 187 | * If it received the entire message, it returns _OK, |
| 188 | * If it's interrupted, it returns _INTERRUPTED, |
| 189 | * otherwise, it returns _ERROR. |
| 190 | */ |
| 191 | static enum lttng_live_viewer_status |
| 192 | lttng_live_recv(struct live_viewer_connection *viewer_connection, void *buf, size_t len) |
| 193 | { |
| 194 | ssize_t received; |
| 195 | size_t total_received = 0, to_receive = len; |
| 196 | struct lttng_live_msg_iter *lttng_live_msg_iter = viewer_connection->lttng_live_msg_iter; |
| 197 | enum lttng_live_viewer_status status; |
| 198 | BT_SOCKET sock = viewer_connection->control_sock; |
| 199 | const bt2_common::LogCfg& logCfg = viewer_connection->logCfg; |
| 200 | |
| 201 | /* |
| 202 | * Receive a message from the Relay. |
| 203 | */ |
| 204 | do { |
| 205 | received = bt_socket_recv(sock, (char *) buf + total_received, to_receive, 0); |
| 206 | if (received == BT_SOCKET_ERROR) { |
| 207 | if (bt_socket_interrupted()) { |
| 208 | if (lttng_live_graph_is_canceled(lttng_live_msg_iter)) { |
| 209 | /* |
| 210 | * This interruption was due to a |
| 211 | * SIGINT and the graph is being torn |
| 212 | * down. |
| 213 | */ |
| 214 | status = LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED; |
| 215 | lttng_live_msg_iter->was_interrupted = true; |
| 216 | goto end; |
| 217 | } else { |
| 218 | /* |
| 219 | * A signal was received, but the graph |
| 220 | * is not being torn down. Carry on. |
| 221 | */ |
| 222 | continue; |
| 223 | } |
| 224 | } else { |
| 225 | /* |
| 226 | * For any other types of socket error, close |
| 227 | * the socket and return an error. |
| 228 | */ |
| 229 | LTTNG_LIVE_CLOGE_APPEND_CAUSE_ERRNO("Error receiving from Relay", "."); |
| 230 | |
| 231 | viewer_connection_close_socket(viewer_connection); |
| 232 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
| 233 | goto end; |
| 234 | } |
| 235 | } else if (received == 0) { |
| 236 | /* |
| 237 | * The recv() call returned 0. This means the |
| 238 | * connection was orderly shutdown from the other peer. |
| 239 | * If that happens when we are trying to receive |
| 240 | * a message from it, it means something when wrong. |
| 241 | * Close the socket and return an error. |
| 242 | */ |
| 243 | BT_CLOGE_APPEND_CAUSE("Remote side has closed connection"); |
| 244 | viewer_connection_close_socket(viewer_connection); |
| 245 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
| 246 | goto end; |
| 247 | } |
| 248 | |
| 249 | BT_ASSERT(received <= to_receive); |
| 250 | total_received += received; |
| 251 | to_receive -= received; |
| 252 | |
| 253 | } while (to_receive > 0); |
| 254 | |
| 255 | BT_ASSERT(total_received == len); |
| 256 | status = LTTNG_LIVE_VIEWER_STATUS_OK; |
| 257 | |
| 258 | end: |
| 259 | return status; |
| 260 | } |
| 261 | |
| 262 | /* |
| 263 | * This function sends a message to the Relay daemon. |
| 264 | * If it send the message, it returns _OK, |
| 265 | * If it's interrupted, it returns _INTERRUPTED, |
| 266 | * otherwise, it returns _ERROR. |
| 267 | */ |
| 268 | static enum lttng_live_viewer_status |
| 269 | lttng_live_send(struct live_viewer_connection *viewer_connection, const void *buf, size_t len) |
| 270 | { |
| 271 | enum lttng_live_viewer_status status; |
| 272 | struct lttng_live_msg_iter *lttng_live_msg_iter = viewer_connection->lttng_live_msg_iter; |
| 273 | BT_SOCKET sock = viewer_connection->control_sock; |
| 274 | size_t to_send = len; |
| 275 | ssize_t total_sent = 0; |
| 276 | const bt2_common::LogCfg& logCfg = viewer_connection->logCfg; |
| 277 | |
| 278 | do { |
| 279 | ssize_t sent = bt_socket_send_nosigpipe(sock, (char *) buf + total_sent, to_send); |
| 280 | if (sent == BT_SOCKET_ERROR) { |
| 281 | if (bt_socket_interrupted()) { |
| 282 | if (lttng_live_graph_is_canceled(lttng_live_msg_iter)) { |
| 283 | /* |
| 284 | * This interruption was a SIGINT and |
| 285 | * the graph is being teared down. |
| 286 | */ |
| 287 | status = LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED; |
| 288 | lttng_live_msg_iter->was_interrupted = true; |
| 289 | goto end; |
| 290 | } else { |
| 291 | /* |
| 292 | * A signal was received, but the graph |
| 293 | * is not being teared down. Carry on. |
| 294 | */ |
| 295 | continue; |
| 296 | } |
| 297 | } else { |
| 298 | /* |
| 299 | * For any other types of socket error, close |
| 300 | * the socket and return an error. |
| 301 | */ |
| 302 | LTTNG_LIVE_CLOGE_APPEND_CAUSE_ERRNO("Error sending to Relay", "."); |
| 303 | |
| 304 | viewer_connection_close_socket(viewer_connection); |
| 305 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
| 306 | goto end; |
| 307 | } |
| 308 | } |
| 309 | |
| 310 | BT_ASSERT(sent <= to_send); |
| 311 | total_sent += sent; |
| 312 | to_send -= sent; |
| 313 | |
| 314 | } while (to_send > 0); |
| 315 | |
| 316 | BT_ASSERT(total_sent == len); |
| 317 | status = LTTNG_LIVE_VIEWER_STATUS_OK; |
| 318 | |
| 319 | end: |
| 320 | return status; |
| 321 | } |
| 322 | |
| 323 | static int parse_url(struct live_viewer_connection *viewer_connection) |
| 324 | { |
| 325 | char error_buf[256] = {0}; |
| 326 | const bt2_common::LogCfg& logCfg = viewer_connection->logCfg; |
| 327 | struct bt_common_lttng_live_url_parts lttng_live_url_parts = {0}; |
| 328 | int ret = -1; |
| 329 | |
| 330 | if (viewer_connection->url.empty()) { |
| 331 | goto end; |
| 332 | } |
| 333 | |
| 334 | lttng_live_url_parts = bt_common_parse_lttng_live_url(viewer_connection->url.c_str(), error_buf, |
| 335 | sizeof(error_buf)); |
| 336 | if (!lttng_live_url_parts.proto) { |
| 337 | BT_CLOGE_APPEND_CAUSE("Invalid LTTng live URL format: %s", error_buf); |
| 338 | goto end; |
| 339 | } |
| 340 | viewer_connection->proto.reset(lttng_live_url_parts.proto); |
| 341 | lttng_live_url_parts.proto = NULL; |
| 342 | |
| 343 | viewer_connection->relay_hostname.reset(lttng_live_url_parts.hostname); |
| 344 | lttng_live_url_parts.hostname = NULL; |
| 345 | |
| 346 | if (lttng_live_url_parts.port >= 0) { |
| 347 | viewer_connection->port = lttng_live_url_parts.port; |
| 348 | } else { |
| 349 | viewer_connection->port = LTTNG_DEFAULT_NETWORK_VIEWER_PORT; |
| 350 | } |
| 351 | |
| 352 | viewer_connection->target_hostname.reset(lttng_live_url_parts.target_hostname); |
| 353 | lttng_live_url_parts.target_hostname = NULL; |
| 354 | |
| 355 | if (lttng_live_url_parts.session_name) { |
| 356 | viewer_connection->session_name.reset(lttng_live_url_parts.session_name); |
| 357 | lttng_live_url_parts.session_name = NULL; |
| 358 | } |
| 359 | |
| 360 | ret = 0; |
| 361 | |
| 362 | end: |
| 363 | bt_common_destroy_lttng_live_url_parts(<tng_live_url_parts); |
| 364 | return ret; |
| 365 | } |
| 366 | |
| 367 | static enum lttng_live_viewer_status |
| 368 | lttng_live_handshake(struct live_viewer_connection *viewer_connection) |
| 369 | { |
| 370 | struct lttng_viewer_cmd cmd; |
| 371 | struct lttng_viewer_connect connect; |
| 372 | enum lttng_live_viewer_status status; |
| 373 | const bt2_common::LogCfg& logCfg = viewer_connection->logCfg; |
| 374 | const size_t cmd_buf_len = sizeof(cmd) + sizeof(connect); |
| 375 | char cmd_buf[cmd_buf_len]; |
| 376 | |
| 377 | BT_CLOGD("Handshaking with the relay daemon: cmd=%s, major-version=%u, minor-version=%u", |
| 378 | lttng_viewer_command_string(LTTNG_VIEWER_CONNECT), LTTNG_LIVE_MAJOR, LTTNG_LIVE_MINOR); |
| 379 | |
| 380 | cmd.cmd = htobe32(LTTNG_VIEWER_CONNECT); |
| 381 | cmd.data_size = htobe64((uint64_t) sizeof(connect)); |
| 382 | cmd.cmd_version = htobe32(0); |
| 383 | |
| 384 | connect.viewer_session_id = -1ULL; /* will be set on recv */ |
| 385 | connect.major = htobe32(LTTNG_LIVE_MAJOR); |
| 386 | connect.minor = htobe32(LTTNG_LIVE_MINOR); |
| 387 | connect.type = htobe32(LTTNG_VIEWER_CLIENT_COMMAND); |
| 388 | |
| 389 | /* |
| 390 | * Merge the cmd and connection request to prevent a write-write |
| 391 | * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the |
| 392 | * second write to be performed quickly in presence of Nagle's algorithm |
| 393 | */ |
| 394 | memcpy(cmd_buf, &cmd, sizeof(cmd)); |
| 395 | memcpy(cmd_buf + sizeof(cmd), &connect, sizeof(connect)); |
| 396 | |
| 397 | status = lttng_live_send(viewer_connection, &cmd_buf, cmd_buf_len); |
| 398 | if (status != LTTNG_LIVE_VIEWER_STATUS_OK) { |
| 399 | viewer_handle_send_status(logCfg, status, "viewer connect command"); |
| 400 | goto end; |
| 401 | } |
| 402 | |
| 403 | status = lttng_live_recv(viewer_connection, &connect, sizeof(connect)); |
| 404 | if (status != LTTNG_LIVE_VIEWER_STATUS_OK) { |
| 405 | viewer_handle_recv_status(logCfg, status, "viewer connect reply"); |
| 406 | goto end; |
| 407 | } |
| 408 | |
| 409 | BT_CLOGI("Received viewer session ID : %" PRIu64, |
| 410 | (uint64_t) be64toh(connect.viewer_session_id)); |
| 411 | BT_CLOGI("Relayd version : %u.%u", be32toh(connect.major), be32toh(connect.minor)); |
| 412 | |
| 413 | if (LTTNG_LIVE_MAJOR != be32toh(connect.major)) { |
| 414 | BT_CLOGE_APPEND_CAUSE("Incompatible lttng-relayd protocol"); |
| 415 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
| 416 | goto end; |
| 417 | } |
| 418 | /* Use the smallest protocol version implemented. */ |
| 419 | if (LTTNG_LIVE_MINOR > be32toh(connect.minor)) { |
| 420 | viewer_connection->minor = be32toh(connect.minor); |
| 421 | } else { |
| 422 | viewer_connection->minor = LTTNG_LIVE_MINOR; |
| 423 | } |
| 424 | viewer_connection->major = LTTNG_LIVE_MAJOR; |
| 425 | |
| 426 | status = LTTNG_LIVE_VIEWER_STATUS_OK; |
| 427 | |
| 428 | goto end; |
| 429 | |
| 430 | end: |
| 431 | return status; |
| 432 | } |
| 433 | |
| 434 | static enum lttng_live_viewer_status |
| 435 | lttng_live_connect_viewer(struct live_viewer_connection *viewer_connection) |
| 436 | { |
| 437 | struct hostent *host; |
| 438 | struct sockaddr_in server_addr; |
| 439 | enum lttng_live_viewer_status status; |
| 440 | const bt2_common::LogCfg& logCfg = viewer_connection->logCfg; |
| 441 | |
| 442 | if (parse_url(viewer_connection)) { |
| 443 | BT_CLOGE_APPEND_CAUSE("Failed to parse URL"); |
| 444 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
| 445 | goto error; |
| 446 | } |
| 447 | |
| 448 | BT_CLOGD("Connecting to hostname : %s, port : %d, " |
| 449 | "target hostname : %s, session name : %s, proto : %s", |
| 450 | viewer_connection->relay_hostname->str, viewer_connection->port, |
| 451 | !viewer_connection->target_hostname ? "<none>" : |
| 452 | viewer_connection->target_hostname->str, |
| 453 | !viewer_connection->session_name ? "<none>" : viewer_connection->session_name->str, |
| 454 | viewer_connection->proto->str); |
| 455 | |
| 456 | host = gethostbyname(viewer_connection->relay_hostname->str); |
| 457 | if (!host) { |
| 458 | BT_CLOGE_APPEND_CAUSE("Cannot lookup hostname: hostname=\"%s\"", |
| 459 | viewer_connection->relay_hostname->str); |
| 460 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
| 461 | goto error; |
| 462 | } |
| 463 | |
| 464 | if ((viewer_connection->control_sock = socket(AF_INET, SOCK_STREAM, 0)) == BT_INVALID_SOCKET) { |
| 465 | BT_CLOGE_APPEND_CAUSE("Socket creation failed: %s", bt_socket_errormsg()); |
| 466 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
| 467 | goto error; |
| 468 | } |
| 469 | |
| 470 | server_addr.sin_family = AF_INET; |
| 471 | server_addr.sin_port = htons(viewer_connection->port); |
| 472 | server_addr.sin_addr = *((struct in_addr *) host->h_addr); |
| 473 | memset(&(server_addr.sin_zero), 0, 8); |
| 474 | |
| 475 | if (connect(viewer_connection->control_sock, (struct sockaddr *) &server_addr, |
| 476 | sizeof(struct sockaddr)) == BT_SOCKET_ERROR) { |
| 477 | BT_CLOGE_APPEND_CAUSE("Connection failed: %s", bt_socket_errormsg()); |
| 478 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
| 479 | goto error; |
| 480 | } |
| 481 | |
| 482 | status = lttng_live_handshake(viewer_connection); |
| 483 | |
| 484 | /* |
| 485 | * Only print error and append cause in case of error. not in case of |
| 486 | * interruption. |
| 487 | */ |
| 488 | if (status == LTTNG_LIVE_VIEWER_STATUS_ERROR) { |
| 489 | BT_CLOGE_APPEND_CAUSE("Viewer handshake failed"); |
| 490 | goto error; |
| 491 | } else if (status == LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED) { |
| 492 | goto end; |
| 493 | } |
| 494 | |
| 495 | goto end; |
| 496 | |
| 497 | error: |
| 498 | if (viewer_connection->control_sock != BT_INVALID_SOCKET) { |
| 499 | if (bt_socket_close(viewer_connection->control_sock) == BT_SOCKET_ERROR) { |
| 500 | BT_CLOGW("Error closing socket: %s.", bt_socket_errormsg()); |
| 501 | } |
| 502 | } |
| 503 | viewer_connection->control_sock = BT_INVALID_SOCKET; |
| 504 | end: |
| 505 | return status; |
| 506 | } |
| 507 | |
| 508 | static void lttng_live_disconnect_viewer(struct live_viewer_connection *viewer_connection) |
| 509 | { |
| 510 | const bt2_common::LogCfg& logCfg = viewer_connection->logCfg; |
| 511 | |
| 512 | if (viewer_connection->control_sock == BT_INVALID_SOCKET) { |
| 513 | return; |
| 514 | } |
| 515 | if (bt_socket_close(viewer_connection->control_sock) == BT_SOCKET_ERROR) { |
| 516 | BT_CLOGW("Error closing socket: %s", bt_socket_errormsg()); |
| 517 | viewer_connection->control_sock = BT_INVALID_SOCKET; |
| 518 | } |
| 519 | } |
| 520 | |
| 521 | static int list_update_session(bt_value *results, const struct lttng_viewer_session *session, |
| 522 | bool *_found, struct live_viewer_connection *viewer_connection) |
| 523 | { |
| 524 | const bt2_common::LogCfg& logCfg = viewer_connection->logCfg; |
| 525 | int ret = 0; |
| 526 | uint64_t i, len; |
| 527 | bt_value *map = NULL; |
| 528 | bt_value *hostname = NULL; |
| 529 | bt_value *session_name = NULL; |
| 530 | bt_value *btval = NULL; |
| 531 | bool found = false; |
| 532 | |
| 533 | len = bt_value_array_get_length(results); |
| 534 | for (i = 0; i < len; i++) { |
| 535 | const char *hostname_str = NULL; |
| 536 | const char *session_name_str = NULL; |
| 537 | |
| 538 | map = bt_value_array_borrow_element_by_index(results, i); |
| 539 | hostname = bt_value_map_borrow_entry_value(map, "target-hostname"); |
| 540 | if (!hostname) { |
| 541 | BT_CLOGE_APPEND_CAUSE("Error borrowing \"target-hostname\" entry."); |
| 542 | ret = -1; |
| 543 | goto end; |
| 544 | } |
| 545 | session_name = bt_value_map_borrow_entry_value(map, "session-name"); |
| 546 | if (!session_name) { |
| 547 | BT_CLOGE_APPEND_CAUSE("Error borrowing \"session-name\" entry."); |
| 548 | ret = -1; |
| 549 | goto end; |
| 550 | } |
| 551 | hostname_str = bt_value_string_get(hostname); |
| 552 | session_name_str = bt_value_string_get(session_name); |
| 553 | |
| 554 | if (strcmp(session->hostname, hostname_str) == 0 && |
| 555 | strcmp(session->session_name, session_name_str) == 0) { |
| 556 | int64_t val; |
| 557 | uint32_t streams = be32toh(session->streams); |
| 558 | uint32_t clients = be32toh(session->clients); |
| 559 | |
| 560 | found = true; |
| 561 | |
| 562 | btval = bt_value_map_borrow_entry_value(map, "stream-count"); |
| 563 | if (!btval) { |
| 564 | BT_CLOGE_APPEND_CAUSE("Error borrowing \"stream-count\" entry."); |
| 565 | ret = -1; |
| 566 | goto end; |
| 567 | } |
| 568 | val = bt_value_integer_unsigned_get(btval); |
| 569 | /* sum */ |
| 570 | val += streams; |
| 571 | bt_value_integer_unsigned_set(btval, val); |
| 572 | |
| 573 | btval = bt_value_map_borrow_entry_value(map, "client-count"); |
| 574 | if (!btval) { |
| 575 | BT_CLOGE_APPEND_CAUSE("Error borrowing \"client-count\" entry."); |
| 576 | ret = -1; |
| 577 | goto end; |
| 578 | } |
| 579 | val = bt_value_integer_unsigned_get(btval); |
| 580 | /* max */ |
| 581 | val = bt_max_t(int64_t, clients, val); |
| 582 | bt_value_integer_unsigned_set(btval, val); |
| 583 | } |
| 584 | |
| 585 | if (found) { |
| 586 | break; |
| 587 | } |
| 588 | } |
| 589 | end: |
| 590 | *_found = found; |
| 591 | return ret; |
| 592 | } |
| 593 | |
| 594 | static int list_append_session(bt_value *results, const std::string& base_url, |
| 595 | const struct lttng_viewer_session *session, |
| 596 | struct live_viewer_connection *viewer_connection) |
| 597 | { |
| 598 | int ret = 0; |
| 599 | const bt2_common::LogCfg& logCfg = viewer_connection->logCfg; |
| 600 | bt_value_map_insert_entry_status insert_status; |
| 601 | bt_value_array_append_element_status append_status; |
| 602 | bt_value *map = NULL; |
| 603 | bool found = false; |
| 604 | std::string url; |
| 605 | |
| 606 | /* |
| 607 | * If the session already exists, add the stream count to it, |
| 608 | * and do max of client counts. |
| 609 | */ |
| 610 | ret = list_update_session(results, session, &found, viewer_connection); |
| 611 | if (ret || found) { |
| 612 | goto end; |
| 613 | } |
| 614 | |
| 615 | map = bt_value_map_create(); |
| 616 | if (!map) { |
| 617 | BT_CLOGE_APPEND_CAUSE("Error creating map value."); |
| 618 | ret = -1; |
| 619 | goto end; |
| 620 | } |
| 621 | |
| 622 | if (base_url.empty()) { |
| 623 | BT_CLOGE_APPEND_CAUSE("Error: base_url empty."); |
| 624 | ret = -1; |
| 625 | goto end; |
| 626 | } |
| 627 | /* |
| 628 | * key = "url", |
| 629 | * value = <string>, |
| 630 | */ |
| 631 | url = base_url; |
| 632 | url += "/host/"; |
| 633 | url += session->hostname; |
| 634 | url += '/'; |
| 635 | url += session->session_name; |
| 636 | |
| 637 | insert_status = bt_value_map_insert_string_entry(map, "url", url.c_str()); |
| 638 | if (insert_status != BT_VALUE_MAP_INSERT_ENTRY_STATUS_OK) { |
| 639 | BT_CLOGE_APPEND_CAUSE("Error inserting \"url\" entry."); |
| 640 | ret = -1; |
| 641 | goto end; |
| 642 | } |
| 643 | |
| 644 | /* |
| 645 | * key = "target-hostname", |
| 646 | * value = <string>, |
| 647 | */ |
| 648 | insert_status = bt_value_map_insert_string_entry(map, "target-hostname", session->hostname); |
| 649 | if (insert_status != BT_VALUE_MAP_INSERT_ENTRY_STATUS_OK) { |
| 650 | BT_CLOGE_APPEND_CAUSE("Error inserting \"target-hostname\" entry."); |
| 651 | ret = -1; |
| 652 | goto end; |
| 653 | } |
| 654 | |
| 655 | /* |
| 656 | * key = "session-name", |
| 657 | * value = <string>, |
| 658 | */ |
| 659 | insert_status = bt_value_map_insert_string_entry(map, "session-name", session->session_name); |
| 660 | if (insert_status != BT_VALUE_MAP_INSERT_ENTRY_STATUS_OK) { |
| 661 | BT_CLOGE_APPEND_CAUSE("Error inserting \"session-name\" entry."); |
| 662 | ret = -1; |
| 663 | goto end; |
| 664 | } |
| 665 | |
| 666 | /* |
| 667 | * key = "timer-us", |
| 668 | * value = <integer>, |
| 669 | */ |
| 670 | { |
| 671 | uint32_t live_timer = be32toh(session->live_timer); |
| 672 | |
| 673 | insert_status = bt_value_map_insert_unsigned_integer_entry(map, "timer-us", live_timer); |
| 674 | if (insert_status != BT_VALUE_MAP_INSERT_ENTRY_STATUS_OK) { |
| 675 | BT_CLOGE_APPEND_CAUSE("Error inserting \"timer-us\" entry."); |
| 676 | ret = -1; |
| 677 | goto end; |
| 678 | } |
| 679 | } |
| 680 | |
| 681 | /* |
| 682 | * key = "stream-count", |
| 683 | * value = <integer>, |
| 684 | */ |
| 685 | { |
| 686 | uint32_t streams = be32toh(session->streams); |
| 687 | |
| 688 | insert_status = bt_value_map_insert_unsigned_integer_entry(map, "stream-count", streams); |
| 689 | if (insert_status != BT_VALUE_MAP_INSERT_ENTRY_STATUS_OK) { |
| 690 | BT_CLOGE_APPEND_CAUSE("Error inserting \"stream-count\" entry."); |
| 691 | ret = -1; |
| 692 | goto end; |
| 693 | } |
| 694 | } |
| 695 | |
| 696 | /* |
| 697 | * key = "client-count", |
| 698 | * value = <integer>, |
| 699 | */ |
| 700 | { |
| 701 | uint32_t clients = be32toh(session->clients); |
| 702 | |
| 703 | insert_status = bt_value_map_insert_unsigned_integer_entry(map, "client-count", clients); |
| 704 | if (insert_status != BT_VALUE_MAP_INSERT_ENTRY_STATUS_OK) { |
| 705 | BT_CLOGE_APPEND_CAUSE("Error inserting \"client-count\" entry."); |
| 706 | ret = -1; |
| 707 | goto end; |
| 708 | } |
| 709 | } |
| 710 | |
| 711 | append_status = bt_value_array_append_element(results, map); |
| 712 | if (append_status != BT_VALUE_ARRAY_APPEND_ELEMENT_STATUS_OK) { |
| 713 | BT_CLOGE_APPEND_CAUSE("Error appending map to results."); |
| 714 | ret = -1; |
| 715 | } |
| 716 | |
| 717 | end: |
| 718 | BT_VALUE_PUT_REF_AND_RESET(map); |
| 719 | return ret; |
| 720 | } |
| 721 | |
| 722 | /* |
| 723 | * Data structure returned: |
| 724 | * |
| 725 | * { |
| 726 | * <array> = { |
| 727 | * [n] = { |
| 728 | * <map> = { |
| 729 | * { |
| 730 | * key = "url", |
| 731 | * value = <string>, |
| 732 | * }, |
| 733 | * { |
| 734 | * key = "target-hostname", |
| 735 | * value = <string>, |
| 736 | * }, |
| 737 | * { |
| 738 | * key = "session-name", |
| 739 | * value = <string>, |
| 740 | * }, |
| 741 | * { |
| 742 | * key = "timer-us", |
| 743 | * value = <integer>, |
| 744 | * }, |
| 745 | * { |
| 746 | * key = "stream-count", |
| 747 | * value = <integer>, |
| 748 | * }, |
| 749 | * { |
| 750 | * key = "client-count", |
| 751 | * value = <integer>, |
| 752 | * }, |
| 753 | * }, |
| 754 | * } |
| 755 | * } |
| 756 | */ |
| 757 | |
| 758 | BT_HIDDEN |
| 759 | bt_component_class_query_method_status |
| 760 | live_viewer_connection_list_sessions(struct live_viewer_connection *viewer_connection, |
| 761 | const bt_value **user_result) |
| 762 | { |
| 763 | const bt2_common::LogCfg& logCfg = viewer_connection->logCfg; |
| 764 | bt_component_class_query_method_status status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_OK; |
| 765 | bt_value *result = NULL; |
| 766 | enum lttng_live_viewer_status viewer_status; |
| 767 | struct lttng_viewer_cmd cmd; |
| 768 | struct lttng_viewer_list_sessions list; |
| 769 | uint32_t i, sessions_count; |
| 770 | |
| 771 | result = bt_value_array_create(); |
| 772 | if (!result) { |
| 773 | BT_CLOGE_APPEND_CAUSE("Error creating array"); |
| 774 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_MEMORY_ERROR; |
| 775 | goto error; |
| 776 | } |
| 777 | |
| 778 | BT_LOGD("Requesting list of sessions: cmd=%s", |
| 779 | lttng_viewer_command_string(LTTNG_VIEWER_LIST_SESSIONS)); |
| 780 | |
| 781 | cmd.cmd = htobe32(LTTNG_VIEWER_LIST_SESSIONS); |
| 782 | cmd.data_size = htobe64((uint64_t) 0); |
| 783 | cmd.cmd_version = htobe32(0); |
| 784 | |
| 785 | viewer_status = lttng_live_send(viewer_connection, &cmd, sizeof(cmd)); |
| 786 | if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_ERROR) { |
| 787 | BT_CLOGE_APPEND_CAUSE("Error sending list sessions command"); |
| 788 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR; |
| 789 | goto error; |
| 790 | } else if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED) { |
| 791 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_AGAIN; |
| 792 | goto error; |
| 793 | } |
| 794 | |
| 795 | viewer_status = lttng_live_recv(viewer_connection, &list, sizeof(list)); |
| 796 | if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_ERROR) { |
| 797 | BT_CLOGE_APPEND_CAUSE("Error receiving session list"); |
| 798 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR; |
| 799 | goto error; |
| 800 | } else if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED) { |
| 801 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_AGAIN; |
| 802 | goto error; |
| 803 | } |
| 804 | |
| 805 | sessions_count = be32toh(list.sessions_count); |
| 806 | for (i = 0; i < sessions_count; i++) { |
| 807 | struct lttng_viewer_session lsession; |
| 808 | |
| 809 | viewer_status = lttng_live_recv(viewer_connection, &lsession, sizeof(lsession)); |
| 810 | if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_ERROR) { |
| 811 | BT_CLOGE_APPEND_CAUSE("Error receiving session:"); |
| 812 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR; |
| 813 | goto error; |
| 814 | } else if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED) { |
| 815 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_AGAIN; |
| 816 | goto error; |
| 817 | } |
| 818 | |
| 819 | lsession.hostname[LTTNG_VIEWER_HOST_NAME_MAX - 1] = '\0'; |
| 820 | lsession.session_name[LTTNG_VIEWER_NAME_MAX - 1] = '\0'; |
| 821 | if (list_append_session(result, viewer_connection->url, &lsession, viewer_connection)) { |
| 822 | BT_CLOGE_APPEND_CAUSE("Error appending session"); |
| 823 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR; |
| 824 | goto error; |
| 825 | } |
| 826 | } |
| 827 | |
| 828 | *user_result = result; |
| 829 | goto end; |
| 830 | error: |
| 831 | BT_VALUE_PUT_REF_AND_RESET(result); |
| 832 | end: |
| 833 | return status; |
| 834 | } |
| 835 | |
| 836 | static enum lttng_live_viewer_status |
| 837 | lttng_live_query_session_ids(struct lttng_live_msg_iter *lttng_live_msg_iter) |
| 838 | { |
| 839 | struct lttng_viewer_cmd cmd; |
| 840 | struct lttng_viewer_list_sessions list; |
| 841 | struct lttng_viewer_session lsession; |
| 842 | uint32_t i, sessions_count; |
| 843 | uint64_t session_id; |
| 844 | enum lttng_live_viewer_status status; |
| 845 | struct live_viewer_connection *viewer_connection = lttng_live_msg_iter->viewer_connection; |
| 846 | const bt2_common::LogCfg& logCfg = lttng_live_msg_iter->logCfg; |
| 847 | |
| 848 | BT_CLOGD("Asking the relay daemon for the list of sessions: cmd=%s", |
| 849 | lttng_viewer_command_string(LTTNG_VIEWER_LIST_SESSIONS)); |
| 850 | |
| 851 | cmd.cmd = htobe32(LTTNG_VIEWER_LIST_SESSIONS); |
| 852 | cmd.data_size = htobe64((uint64_t) 0); |
| 853 | cmd.cmd_version = htobe32(0); |
| 854 | |
| 855 | status = lttng_live_send(viewer_connection, &cmd, sizeof(cmd)); |
| 856 | if (status != LTTNG_LIVE_VIEWER_STATUS_OK) { |
| 857 | viewer_handle_send_status(logCfg, status, "list sessions command"); |
| 858 | goto end; |
| 859 | } |
| 860 | |
| 861 | status = lttng_live_recv(viewer_connection, &list, sizeof(list)); |
| 862 | if (status != LTTNG_LIVE_VIEWER_STATUS_OK) { |
| 863 | viewer_handle_recv_status(logCfg, status, "session list reply"); |
| 864 | goto end; |
| 865 | } |
| 866 | |
| 867 | sessions_count = be32toh(list.sessions_count); |
| 868 | for (i = 0; i < sessions_count; i++) { |
| 869 | status = lttng_live_recv(viewer_connection, &lsession, sizeof(lsession)); |
| 870 | if (status != LTTNG_LIVE_VIEWER_STATUS_OK) { |
| 871 | viewer_handle_recv_status(logCfg, status, "session reply"); |
| 872 | goto end; |
| 873 | } |
| 874 | lsession.hostname[LTTNG_VIEWER_HOST_NAME_MAX - 1] = '\0'; |
| 875 | lsession.session_name[LTTNG_VIEWER_NAME_MAX - 1] = '\0'; |
| 876 | session_id = be64toh(lsession.id); |
| 877 | |
| 878 | BT_CLOGI("Adding session to internal list: " |
| 879 | "session-id=%" PRIu64 ", hostname=\"%s\", session-name=\"%s\"", |
| 880 | session_id, lsession.hostname, lsession.session_name); |
| 881 | |
| 882 | if ((strncmp(lsession.session_name, viewer_connection->session_name->str, |
| 883 | LTTNG_VIEWER_NAME_MAX) == 0) && |
| 884 | (strncmp(lsession.hostname, viewer_connection->target_hostname->str, |
| 885 | LTTNG_VIEWER_HOST_NAME_MAX) == 0)) { |
| 886 | if (lttng_live_add_session(lttng_live_msg_iter, session_id, lsession.hostname, |
| 887 | lsession.session_name)) { |
| 888 | BT_CLOGE_APPEND_CAUSE("Failed to add live session"); |
| 889 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
| 890 | goto end; |
| 891 | } |
| 892 | } |
| 893 | } |
| 894 | |
| 895 | status = LTTNG_LIVE_VIEWER_STATUS_OK; |
| 896 | |
| 897 | end: |
| 898 | return status; |
| 899 | } |
| 900 | |
| 901 | BT_HIDDEN |
| 902 | enum lttng_live_viewer_status |
| 903 | lttng_live_create_viewer_session(struct lttng_live_msg_iter *lttng_live_msg_iter) |
| 904 | { |
| 905 | struct lttng_viewer_cmd cmd; |
| 906 | struct lttng_viewer_create_session_response resp; |
| 907 | enum lttng_live_viewer_status status; |
| 908 | struct live_viewer_connection *viewer_connection = lttng_live_msg_iter->viewer_connection; |
| 909 | const bt2_common::LogCfg& logCfg = lttng_live_msg_iter->logCfg; |
| 910 | |
| 911 | BT_CLOGD("Creating a viewer session: cmd=%s", |
| 912 | lttng_viewer_command_string(LTTNG_VIEWER_CREATE_SESSION)); |
| 913 | |
| 914 | cmd.cmd = htobe32(LTTNG_VIEWER_CREATE_SESSION); |
| 915 | cmd.data_size = htobe64((uint64_t) 0); |
| 916 | cmd.cmd_version = htobe32(0); |
| 917 | |
| 918 | status = lttng_live_send(viewer_connection, &cmd, sizeof(cmd)); |
| 919 | if (status != LTTNG_LIVE_VIEWER_STATUS_OK) { |
| 920 | viewer_handle_send_status(logCfg, status, "create session command"); |
| 921 | goto end; |
| 922 | } |
| 923 | |
| 924 | status = lttng_live_recv(viewer_connection, &resp, sizeof(resp)); |
| 925 | if (status != LTTNG_LIVE_VIEWER_STATUS_OK) { |
| 926 | viewer_handle_recv_status(logCfg, status, "create session reply"); |
| 927 | goto end; |
| 928 | } |
| 929 | |
| 930 | if (be32toh(resp.status) != LTTNG_VIEWER_CREATE_SESSION_OK) { |
| 931 | BT_CLOGE_APPEND_CAUSE("Error creating viewer session"); |
| 932 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
| 933 | goto end; |
| 934 | } |
| 935 | |
| 936 | status = lttng_live_query_session_ids(lttng_live_msg_iter); |
| 937 | if (status == LTTNG_LIVE_VIEWER_STATUS_ERROR) { |
| 938 | BT_CLOGE_APPEND_CAUSE("Failed to query live viewer session ids"); |
| 939 | goto end; |
| 940 | } else if (status == LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED) { |
| 941 | goto end; |
| 942 | } |
| 943 | |
| 944 | end: |
| 945 | return status; |
| 946 | } |
| 947 | |
| 948 | static enum lttng_live_viewer_status receive_streams(struct lttng_live_session *session, |
| 949 | uint32_t stream_count, |
| 950 | bt_self_message_iterator *self_msg_iter) |
| 951 | { |
| 952 | uint32_t i; |
| 953 | struct lttng_live_msg_iter *lttng_live_msg_iter = session->lttng_live_msg_iter; |
| 954 | enum lttng_live_viewer_status status; |
| 955 | struct live_viewer_connection *viewer_connection = lttng_live_msg_iter->viewer_connection; |
| 956 | const bt2_common::LogCfg& logCfg = session->logCfg; |
| 957 | |
| 958 | BT_CLOGI("Getting %" PRIu32 " new streams", stream_count); |
| 959 | for (i = 0; i < stream_count; i++) { |
| 960 | struct lttng_viewer_stream stream; |
| 961 | struct lttng_live_stream_iterator *live_stream; |
| 962 | uint64_t stream_id; |
| 963 | uint64_t ctf_trace_id; |
| 964 | |
| 965 | status = lttng_live_recv(viewer_connection, &stream, sizeof(stream)); |
| 966 | if (status != LTTNG_LIVE_VIEWER_STATUS_OK) { |
| 967 | viewer_handle_recv_status(logCfg, status, "stream reply"); |
| 968 | goto end; |
| 969 | } |
| 970 | stream.path_name[LTTNG_VIEWER_PATH_MAX - 1] = '\0'; |
| 971 | stream.channel_name[LTTNG_VIEWER_NAME_MAX - 1] = '\0'; |
| 972 | stream_id = be64toh(stream.id); |
| 973 | ctf_trace_id = be64toh(stream.ctf_trace_id); |
| 974 | |
| 975 | if (stream.metadata_flag) { |
| 976 | BT_CLOGI(" metadata stream %" PRIu64 " : %s/%s", stream_id, stream.path_name, |
| 977 | stream.channel_name); |
| 978 | if (lttng_live_metadata_create_stream(session, ctf_trace_id, stream_id, |
| 979 | stream.path_name)) { |
| 980 | BT_CLOGE_APPEND_CAUSE("Error creating metadata stream"); |
| 981 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
| 982 | goto end; |
| 983 | } |
| 984 | session->lazy_stream_msg_init = true; |
| 985 | } else { |
| 986 | BT_CLOGI(" stream %" PRIu64 " : %s/%s", stream_id, stream.path_name, |
| 987 | stream.channel_name); |
| 988 | live_stream = |
| 989 | lttng_live_stream_iterator_create(session, ctf_trace_id, stream_id, self_msg_iter); |
| 990 | if (!live_stream) { |
| 991 | BT_CLOGE_APPEND_CAUSE("Error creating stream"); |
| 992 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
| 993 | goto end; |
| 994 | } |
| 995 | } |
| 996 | } |
| 997 | status = LTTNG_LIVE_VIEWER_STATUS_OK; |
| 998 | |
| 999 | end: |
| 1000 | return status; |
| 1001 | } |
| 1002 | |
| 1003 | BT_HIDDEN |
| 1004 | enum lttng_live_viewer_status lttng_live_session_attach(struct lttng_live_session *session, |
| 1005 | bt_self_message_iterator *self_msg_iter) |
| 1006 | { |
| 1007 | struct lttng_viewer_cmd cmd; |
| 1008 | enum lttng_live_viewer_status status; |
| 1009 | struct lttng_viewer_attach_session_request rq; |
| 1010 | struct lttng_viewer_attach_session_response rp; |
| 1011 | struct lttng_live_msg_iter *lttng_live_msg_iter = session->lttng_live_msg_iter; |
| 1012 | struct live_viewer_connection *viewer_connection = lttng_live_msg_iter->viewer_connection; |
| 1013 | const bt2_common::LogCfg& logCfg = session->logCfg; |
| 1014 | uint64_t session_id = session->id; |
| 1015 | uint32_t streams_count; |
| 1016 | const size_t cmd_buf_len = sizeof(cmd) + sizeof(rq); |
| 1017 | char cmd_buf[cmd_buf_len]; |
| 1018 | |
| 1019 | BT_CLOGD("Attaching to session: cmd=%s, session-id=%" PRIu64 ", seek=%s", |
| 1020 | lttng_viewer_command_string(LTTNG_VIEWER_ATTACH_SESSION), session_id, |
| 1021 | lttng_viewer_seek_string(LTTNG_VIEWER_SEEK_LAST)); |
| 1022 | |
| 1023 | cmd.cmd = htobe32(LTTNG_VIEWER_ATTACH_SESSION); |
| 1024 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); |
| 1025 | cmd.cmd_version = htobe32(0); |
| 1026 | |
| 1027 | memset(&rq, 0, sizeof(rq)); |
| 1028 | rq.session_id = htobe64(session_id); |
| 1029 | // TODO: add cmd line parameter to select seek beginning |
| 1030 | // rq.seek = htobe32(LTTNG_VIEWER_SEEK_BEGINNING); |
| 1031 | rq.seek = htobe32(LTTNG_VIEWER_SEEK_LAST); |
| 1032 | |
| 1033 | /* |
| 1034 | * Merge the cmd and connection request to prevent a write-write |
| 1035 | * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the |
| 1036 | * second write to be performed quickly in presence of Nagle's algorithm. |
| 1037 | */ |
| 1038 | memcpy(cmd_buf, &cmd, sizeof(cmd)); |
| 1039 | memcpy(cmd_buf + sizeof(cmd), &rq, sizeof(rq)); |
| 1040 | status = lttng_live_send(viewer_connection, &cmd_buf, cmd_buf_len); |
| 1041 | if (status != LTTNG_LIVE_VIEWER_STATUS_OK) { |
| 1042 | viewer_handle_send_status(logCfg, status, "attach session command"); |
| 1043 | goto end; |
| 1044 | } |
| 1045 | |
| 1046 | status = lttng_live_recv(viewer_connection, &rp, sizeof(rp)); |
| 1047 | if (status != LTTNG_LIVE_VIEWER_STATUS_OK) { |
| 1048 | viewer_handle_recv_status(logCfg, status, "attach session reply"); |
| 1049 | goto end; |
| 1050 | } |
| 1051 | |
| 1052 | streams_count = be32toh(rp.streams_count); |
| 1053 | switch (be32toh(rp.status)) { |
| 1054 | case LTTNG_VIEWER_ATTACH_OK: |
| 1055 | break; |
| 1056 | case LTTNG_VIEWER_ATTACH_UNK: |
| 1057 | BT_CLOGE_APPEND_CAUSE("Session id %" PRIu64 " is unknown", session_id); |
| 1058 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
| 1059 | goto end; |
| 1060 | case LTTNG_VIEWER_ATTACH_ALREADY: |
| 1061 | BT_CLOGE_APPEND_CAUSE("There is already a viewer attached to this session"); |
| 1062 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
| 1063 | goto end; |
| 1064 | case LTTNG_VIEWER_ATTACH_NOT_LIVE: |
| 1065 | BT_CLOGE_APPEND_CAUSE("Not a live session"); |
| 1066 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
| 1067 | goto end; |
| 1068 | case LTTNG_VIEWER_ATTACH_SEEK_ERR: |
| 1069 | BT_CLOGE_APPEND_CAUSE("Wrong seek parameter"); |
| 1070 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
| 1071 | goto end; |
| 1072 | default: |
| 1073 | BT_CLOGE_APPEND_CAUSE("Unknown attach return code %u", be32toh(rp.status)); |
| 1074 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
| 1075 | goto end; |
| 1076 | } |
| 1077 | |
| 1078 | /* We receive the initial list of streams. */ |
| 1079 | status = receive_streams(session, streams_count, self_msg_iter); |
| 1080 | switch (status) { |
| 1081 | case LTTNG_LIVE_VIEWER_STATUS_OK: |
| 1082 | break; |
| 1083 | case LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED: |
| 1084 | goto end; |
| 1085 | case LTTNG_LIVE_VIEWER_STATUS_ERROR: |
| 1086 | BT_CLOGE_APPEND_CAUSE("Error receiving streams"); |
| 1087 | goto end; |
| 1088 | default: |
| 1089 | bt_common_abort(); |
| 1090 | } |
| 1091 | |
| 1092 | session->attached = true; |
| 1093 | session->new_streams_needed = false; |
| 1094 | |
| 1095 | end: |
| 1096 | return status; |
| 1097 | } |
| 1098 | |
| 1099 | BT_HIDDEN |
| 1100 | enum lttng_live_viewer_status lttng_live_session_detach(struct lttng_live_session *session) |
| 1101 | { |
| 1102 | struct lttng_viewer_cmd cmd; |
| 1103 | enum lttng_live_viewer_status status; |
| 1104 | struct lttng_viewer_detach_session_request rq; |
| 1105 | struct lttng_viewer_detach_session_response rp; |
| 1106 | struct lttng_live_msg_iter *lttng_live_msg_iter = session->lttng_live_msg_iter; |
| 1107 | struct live_viewer_connection *viewer_connection = lttng_live_msg_iter->viewer_connection; |
| 1108 | uint64_t session_id = session->id; |
| 1109 | const size_t cmd_buf_len = sizeof(cmd) + sizeof(rq); |
| 1110 | char cmd_buf[cmd_buf_len]; |
| 1111 | const bt2_common::LogCfg& logCfg = session->logCfg; |
| 1112 | |
| 1113 | /* |
| 1114 | * The session might already be detached and the viewer socket might |
| 1115 | * already been closed. This happens when calling this function when |
| 1116 | * tearing down the graph after an error. |
| 1117 | */ |
| 1118 | if (!session->attached || viewer_connection->control_sock == BT_INVALID_SOCKET) { |
| 1119 | return LTTNG_LIVE_VIEWER_STATUS_OK; |
| 1120 | } |
| 1121 | |
| 1122 | BT_CLOGD("Detaching from session: cmd=%s, session-id=%" PRIu64, |
| 1123 | lttng_viewer_command_string(LTTNG_VIEWER_DETACH_SESSION), session_id); |
| 1124 | |
| 1125 | cmd.cmd = htobe32(LTTNG_VIEWER_DETACH_SESSION); |
| 1126 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); |
| 1127 | cmd.cmd_version = htobe32(0); |
| 1128 | |
| 1129 | memset(&rq, 0, sizeof(rq)); |
| 1130 | rq.session_id = htobe64(session_id); |
| 1131 | |
| 1132 | /* |
| 1133 | * Merge the cmd and connection request to prevent a write-write |
| 1134 | * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the |
| 1135 | * second write to be performed quickly in presence of Nagle's algorithm. |
| 1136 | */ |
| 1137 | memcpy(cmd_buf, &cmd, sizeof(cmd)); |
| 1138 | memcpy(cmd_buf + sizeof(cmd), &rq, sizeof(rq)); |
| 1139 | status = lttng_live_send(viewer_connection, &cmd_buf, cmd_buf_len); |
| 1140 | if (status != LTTNG_LIVE_VIEWER_STATUS_OK) { |
| 1141 | viewer_handle_send_status(logCfg, status, "detach session command"); |
| 1142 | goto end; |
| 1143 | } |
| 1144 | |
| 1145 | status = lttng_live_recv(viewer_connection, &rp, sizeof(rp)); |
| 1146 | if (status != LTTNG_LIVE_VIEWER_STATUS_OK) { |
| 1147 | viewer_handle_recv_status(logCfg, status, "detach session reply"); |
| 1148 | goto end; |
| 1149 | } |
| 1150 | |
| 1151 | switch (be32toh(rp.status)) { |
| 1152 | case LTTNG_VIEWER_DETACH_SESSION_OK: |
| 1153 | break; |
| 1154 | case LTTNG_VIEWER_DETACH_SESSION_UNK: |
| 1155 | BT_CLOGW("Session id %" PRIu64 " is unknown", session_id); |
| 1156 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
| 1157 | goto end; |
| 1158 | case LTTNG_VIEWER_DETACH_SESSION_ERR: |
| 1159 | BT_CLOGW("Error detaching session id %" PRIu64 "", session_id); |
| 1160 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
| 1161 | goto end; |
| 1162 | default: |
| 1163 | BT_CLOGE("Unknown detach return code %u", be32toh(rp.status)); |
| 1164 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
| 1165 | goto end; |
| 1166 | } |
| 1167 | |
| 1168 | session->attached = false; |
| 1169 | |
| 1170 | status = LTTNG_LIVE_VIEWER_STATUS_OK; |
| 1171 | |
| 1172 | end: |
| 1173 | return status; |
| 1174 | } |
| 1175 | |
| 1176 | BT_HIDDEN |
| 1177 | enum lttng_live_get_one_metadata_status |
| 1178 | lttng_live_get_one_metadata_packet(struct lttng_live_trace *trace, std::vector<char>& buf) |
| 1179 | { |
| 1180 | uint64_t len = 0; |
| 1181 | enum lttng_live_get_one_metadata_status status; |
| 1182 | enum lttng_live_viewer_status viewer_status; |
| 1183 | struct lttng_viewer_cmd cmd; |
| 1184 | struct lttng_viewer_get_metadata rq; |
| 1185 | struct lttng_viewer_metadata_packet rp; |
| 1186 | std::vector<char> data; |
| 1187 | struct lttng_live_session *session = trace->session; |
| 1188 | struct lttng_live_msg_iter *lttng_live_msg_iter = session->lttng_live_msg_iter; |
| 1189 | struct lttng_live_metadata *metadata = trace->metadata.get(); |
| 1190 | struct live_viewer_connection *viewer_connection = lttng_live_msg_iter->viewer_connection; |
| 1191 | const bt2_common::LogCfg& logCfg = trace->logCfg; |
| 1192 | const size_t cmd_buf_len = sizeof(cmd) + sizeof(rq); |
| 1193 | char cmd_buf[cmd_buf_len]; |
| 1194 | |
| 1195 | BT_CLOGD("Requesting new metadata for trace:" |
| 1196 | "cmd=%s, trace-id=%" PRIu64 ", metadata-stream-id=%" PRIu64, |
| 1197 | lttng_viewer_command_string(LTTNG_VIEWER_GET_METADATA), trace->id, |
| 1198 | metadata->stream_id); |
| 1199 | |
| 1200 | rq.stream_id = htobe64(metadata->stream_id); |
| 1201 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_METADATA); |
| 1202 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); |
| 1203 | cmd.cmd_version = htobe32(0); |
| 1204 | |
| 1205 | /* |
| 1206 | * Merge the cmd and connection request to prevent a write-write |
| 1207 | * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the |
| 1208 | * second write to be performed quickly in presence of Nagle's algorithm. |
| 1209 | */ |
| 1210 | memcpy(cmd_buf, &cmd, sizeof(cmd)); |
| 1211 | memcpy(cmd_buf + sizeof(cmd), &rq, sizeof(rq)); |
| 1212 | viewer_status = lttng_live_send(viewer_connection, &cmd_buf, cmd_buf_len); |
| 1213 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { |
| 1214 | viewer_handle_send_status(logCfg, viewer_status, "get metadata command"); |
| 1215 | status = (enum lttng_live_get_one_metadata_status) viewer_status; |
| 1216 | goto end; |
| 1217 | } |
| 1218 | |
| 1219 | viewer_status = lttng_live_recv(viewer_connection, &rp, sizeof(rp)); |
| 1220 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { |
| 1221 | viewer_handle_recv_status(logCfg, viewer_status, "get metadata reply"); |
| 1222 | status = (enum lttng_live_get_one_metadata_status) viewer_status; |
| 1223 | goto end; |
| 1224 | } |
| 1225 | |
| 1226 | switch (be32toh(rp.status)) { |
| 1227 | case LTTNG_VIEWER_METADATA_OK: |
| 1228 | BT_CLOGD("Received get_metadata response: ok"); |
| 1229 | break; |
| 1230 | case LTTNG_VIEWER_NO_NEW_METADATA: |
| 1231 | BT_CLOGD("Received get_metadata response: no new"); |
| 1232 | status = LTTNG_LIVE_GET_ONE_METADATA_STATUS_END; |
| 1233 | goto end; |
| 1234 | case LTTNG_VIEWER_METADATA_ERR: |
| 1235 | /* |
| 1236 | * The Relayd cannot find this stream id. Maybe its |
| 1237 | * gone already. This can happen in short lived UST app |
| 1238 | * in a per-pid session. |
| 1239 | */ |
| 1240 | BT_CLOGD("Received get_metadata response: error"); |
| 1241 | status = LTTNG_LIVE_GET_ONE_METADATA_STATUS_CLOSED; |
| 1242 | goto end; |
| 1243 | default: |
| 1244 | BT_CLOGE_APPEND_CAUSE("Received get_metadata response: unknown"); |
| 1245 | status = LTTNG_LIVE_GET_ONE_METADATA_STATUS_ERROR; |
| 1246 | goto end; |
| 1247 | } |
| 1248 | |
| 1249 | len = be64toh(rp.len); |
| 1250 | if (len == 0) { |
| 1251 | /* |
| 1252 | * We received a `LTTNG_VIEWER_METADATA_OK` with a packet |
| 1253 | * length of 0. This means we must try again. This scenario |
| 1254 | * arises when a clear command is performed on an lttng session. |
| 1255 | */ |
| 1256 | BT_CLOGD("Expecting a metadata packet of size 0. Retry to get a packet from the relay."); |
| 1257 | goto empty_metadata_packet_retry; |
| 1258 | } |
| 1259 | |
| 1260 | BT_CLOGD("Writing %" PRIu64 " bytes to metadata", len); |
| 1261 | if (len <= 0) { |
| 1262 | BT_CLOGE_APPEND_CAUSE("Erroneous response length"); |
| 1263 | status = LTTNG_LIVE_GET_ONE_METADATA_STATUS_ERROR; |
| 1264 | goto end; |
| 1265 | } |
| 1266 | |
| 1267 | data.resize(len); |
| 1268 | |
| 1269 | viewer_status = lttng_live_recv(viewer_connection, data.data(), len); |
| 1270 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { |
| 1271 | viewer_handle_recv_status(logCfg, viewer_status, "get metadata packet"); |
| 1272 | status = (enum lttng_live_get_one_metadata_status) viewer_status; |
| 1273 | goto end; |
| 1274 | } |
| 1275 | |
| 1276 | /* |
| 1277 | * Write the metadata to the file handle. |
| 1278 | */ |
| 1279 | buf.insert(buf.end(), data.begin(), data.end()); |
| 1280 | |
| 1281 | empty_metadata_packet_retry: |
| 1282 | status = LTTNG_LIVE_GET_ONE_METADATA_STATUS_OK; |
| 1283 | |
| 1284 | end: |
| 1285 | return status; |
| 1286 | } |
| 1287 | |
| 1288 | /* |
| 1289 | * Assign the fields from a lttng_viewer_index to a packet_index. |
| 1290 | */ |
| 1291 | static void lttng_index_to_packet_index(struct lttng_viewer_index *lindex, |
| 1292 | struct packet_index *pindex) |
| 1293 | { |
| 1294 | BT_ASSERT(lindex); |
| 1295 | BT_ASSERT(pindex); |
| 1296 | |
| 1297 | pindex->offset = be64toh(lindex->offset); |
| 1298 | pindex->packet_size = be64toh(lindex->packet_size); |
| 1299 | pindex->content_size = be64toh(lindex->content_size); |
| 1300 | pindex->ts_cycles.timestamp_begin = be64toh(lindex->timestamp_begin); |
| 1301 | pindex->ts_cycles.timestamp_end = be64toh(lindex->timestamp_end); |
| 1302 | pindex->events_discarded = be64toh(lindex->events_discarded); |
| 1303 | } |
| 1304 | |
| 1305 | static void lttng_live_need_new_streams(struct lttng_live_msg_iter *lttng_live_msg_iter) |
| 1306 | { |
| 1307 | const bt2_common::LogCfg& logCfg = lttng_live_msg_iter->logCfg; |
| 1308 | |
| 1309 | for (lttng_live_session::UP& session : lttng_live_msg_iter->sessions) { |
| 1310 | BT_CLOGD("Marking session as needing new streams: " |
| 1311 | "session-id=%" PRIu64, |
| 1312 | session->id); |
| 1313 | session->new_streams_needed = true; |
| 1314 | } |
| 1315 | } |
| 1316 | |
| 1317 | BT_HIDDEN |
| 1318 | enum lttng_live_iterator_status |
| 1319 | lttng_live_get_next_index(struct lttng_live_msg_iter *lttng_live_msg_iter, |
| 1320 | struct lttng_live_stream_iterator *stream, struct packet_index *index) |
| 1321 | { |
| 1322 | struct lttng_viewer_cmd cmd; |
| 1323 | struct lttng_viewer_get_next_index rq; |
| 1324 | enum lttng_live_viewer_status viewer_status; |
| 1325 | struct lttng_viewer_index rp; |
| 1326 | enum lttng_live_iterator_status status; |
| 1327 | struct live_viewer_connection *viewer_connection = lttng_live_msg_iter->viewer_connection; |
| 1328 | struct lttng_live_trace *trace = stream->trace; |
| 1329 | const size_t cmd_buf_len = sizeof(cmd) + sizeof(rq); |
| 1330 | char cmd_buf[cmd_buf_len]; |
| 1331 | uint32_t flags, rp_status; |
| 1332 | const bt2_common::LogCfg& logCfg = lttng_live_msg_iter->logCfg; |
| 1333 | |
| 1334 | BT_CLOGD("Requesting next index for stream: cmd=%s, " |
| 1335 | "viewer-stream-id=%" PRIu64, |
| 1336 | lttng_viewer_command_string(LTTNG_VIEWER_GET_NEXT_INDEX), stream->viewer_stream_id); |
| 1337 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_NEXT_INDEX); |
| 1338 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); |
| 1339 | cmd.cmd_version = htobe32(0); |
| 1340 | |
| 1341 | memset(&rq, 0, sizeof(rq)); |
| 1342 | rq.stream_id = htobe64(stream->viewer_stream_id); |
| 1343 | |
| 1344 | /* |
| 1345 | * Merge the cmd and connection request to prevent a write-write |
| 1346 | * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the |
| 1347 | * second write to be performed quickly in presence of Nagle's algorithm. |
| 1348 | */ |
| 1349 | memcpy(cmd_buf, &cmd, sizeof(cmd)); |
| 1350 | memcpy(cmd_buf + sizeof(cmd), &rq, sizeof(rq)); |
| 1351 | |
| 1352 | viewer_status = lttng_live_send(viewer_connection, &cmd_buf, cmd_buf_len); |
| 1353 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { |
| 1354 | viewer_handle_send_status(logCfg, viewer_status, "get next index command"); |
| 1355 | goto error; |
| 1356 | } |
| 1357 | |
| 1358 | viewer_status = lttng_live_recv(viewer_connection, &rp, sizeof(rp)); |
| 1359 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { |
| 1360 | viewer_handle_recv_status(logCfg, viewer_status, "get next index reply"); |
| 1361 | goto error; |
| 1362 | } |
| 1363 | |
| 1364 | flags = be32toh(rp.flags); |
| 1365 | rp_status = be32toh(rp.status); |
| 1366 | |
| 1367 | BT_CLOGD("Received response from relay daemon: cmd=%s, response=%s", |
| 1368 | lttng_viewer_command_string(LTTNG_VIEWER_GET_NEXT_INDEX), |
| 1369 | lttng_viewer_next_index_return_code_string(rp_status)); |
| 1370 | switch (rp_status) { |
| 1371 | case LTTNG_VIEWER_INDEX_INACTIVE: |
| 1372 | { |
| 1373 | uint64_t ctf_stream_class_id; |
| 1374 | |
| 1375 | memset(index, 0, sizeof(struct packet_index)); |
| 1376 | index->ts_cycles.timestamp_end = be64toh(rp.timestamp_end); |
| 1377 | stream->current_inactivity_ts = index->ts_cycles.timestamp_end; |
| 1378 | ctf_stream_class_id = be64toh(rp.stream_id); |
| 1379 | if (stream->ctf_stream_class_id.is_set) { |
| 1380 | BT_ASSERT(stream->ctf_stream_class_id.value == ctf_stream_class_id); |
| 1381 | } else { |
| 1382 | stream->ctf_stream_class_id.value = ctf_stream_class_id; |
| 1383 | stream->ctf_stream_class_id.is_set = true; |
| 1384 | } |
| 1385 | lttng_live_stream_iterator_set_state(stream, LTTNG_LIVE_STREAM_QUIESCENT); |
| 1386 | status = LTTNG_LIVE_ITERATOR_STATUS_OK; |
| 1387 | break; |
| 1388 | } |
| 1389 | case LTTNG_VIEWER_INDEX_OK: |
| 1390 | { |
| 1391 | uint64_t ctf_stream_class_id; |
| 1392 | |
| 1393 | lttng_index_to_packet_index(&rp, index); |
| 1394 | ctf_stream_class_id = be64toh(rp.stream_id); |
| 1395 | if (stream->ctf_stream_class_id.is_set) { |
| 1396 | BT_ASSERT(stream->ctf_stream_class_id.value == ctf_stream_class_id); |
| 1397 | } else { |
| 1398 | stream->ctf_stream_class_id.value = ctf_stream_class_id; |
| 1399 | stream->ctf_stream_class_id.is_set = true; |
| 1400 | } |
| 1401 | |
| 1402 | lttng_live_stream_iterator_set_state(stream, LTTNG_LIVE_STREAM_ACTIVE_DATA); |
| 1403 | |
| 1404 | if (flags & LTTNG_VIEWER_FLAG_NEW_METADATA) { |
| 1405 | BT_CLOGD("Marking trace as needing new metadata: " |
| 1406 | "response=%s, response-flag=NEW_METADATA, trace-id=%" PRIu64, |
| 1407 | lttng_viewer_next_index_return_code_string(rp_status), trace->id); |
| 1408 | trace->metadata_stream_state = LTTNG_LIVE_METADATA_STREAM_STATE_NEEDED; |
| 1409 | } |
| 1410 | if (flags & LTTNG_VIEWER_FLAG_NEW_STREAM) { |
| 1411 | BT_CLOGD("Marking all sessions as possibly needing new streams: " |
| 1412 | "response=%s, response-flag=NEW_STREAM", |
| 1413 | lttng_viewer_next_index_return_code_string(rp_status)); |
| 1414 | lttng_live_need_new_streams(lttng_live_msg_iter); |
| 1415 | } |
| 1416 | status = LTTNG_LIVE_ITERATOR_STATUS_OK; |
| 1417 | break; |
| 1418 | } |
| 1419 | case LTTNG_VIEWER_INDEX_RETRY: |
| 1420 | memset(index, 0, sizeof(struct packet_index)); |
| 1421 | lttng_live_stream_iterator_set_state(stream, LTTNG_LIVE_STREAM_ACTIVE_NO_DATA); |
| 1422 | status = LTTNG_LIVE_ITERATOR_STATUS_AGAIN; |
| 1423 | goto end; |
| 1424 | case LTTNG_VIEWER_INDEX_HUP: |
| 1425 | memset(index, 0, sizeof(struct packet_index)); |
| 1426 | index->offset = EOF; |
| 1427 | lttng_live_stream_iterator_set_state(stream, LTTNG_LIVE_STREAM_EOF); |
| 1428 | stream->has_stream_hung_up = true; |
| 1429 | status = LTTNG_LIVE_ITERATOR_STATUS_END; |
| 1430 | break; |
| 1431 | case LTTNG_VIEWER_INDEX_ERR: |
| 1432 | memset(index, 0, sizeof(struct packet_index)); |
| 1433 | lttng_live_stream_iterator_set_state(stream, LTTNG_LIVE_STREAM_ACTIVE_NO_DATA); |
| 1434 | status = LTTNG_LIVE_ITERATOR_STATUS_ERROR; |
| 1435 | goto end; |
| 1436 | default: |
| 1437 | BT_CLOGD("Received get_next_index response: unknown value"); |
| 1438 | memset(index, 0, sizeof(struct packet_index)); |
| 1439 | lttng_live_stream_iterator_set_state(stream, LTTNG_LIVE_STREAM_ACTIVE_NO_DATA); |
| 1440 | status = LTTNG_LIVE_ITERATOR_STATUS_ERROR; |
| 1441 | goto end; |
| 1442 | } |
| 1443 | goto end; |
| 1444 | |
| 1445 | error: |
| 1446 | status = viewer_status_to_live_iterator_status(viewer_status); |
| 1447 | end: |
| 1448 | return status; |
| 1449 | } |
| 1450 | |
| 1451 | BT_HIDDEN |
| 1452 | enum ctf_msg_iter_medium_status |
| 1453 | lttng_live_get_stream_bytes(struct lttng_live_msg_iter *lttng_live_msg_iter, |
| 1454 | struct lttng_live_stream_iterator *stream, uint8_t *buf, |
| 1455 | uint64_t offset, uint64_t req_len, uint64_t *recv_len) |
| 1456 | { |
| 1457 | enum ctf_msg_iter_medium_status status; |
| 1458 | enum lttng_live_viewer_status viewer_status; |
| 1459 | struct lttng_viewer_trace_packet rp; |
| 1460 | struct lttng_viewer_cmd cmd; |
| 1461 | struct lttng_viewer_get_packet rq; |
| 1462 | struct live_viewer_connection *viewer_connection = lttng_live_msg_iter->viewer_connection; |
| 1463 | const bt2_common::LogCfg& logCfg = lttng_live_msg_iter->logCfg; |
| 1464 | struct lttng_live_trace *trace = stream->trace; |
| 1465 | const size_t cmd_buf_len = sizeof(cmd) + sizeof(rq); |
| 1466 | char cmd_buf[cmd_buf_len]; |
| 1467 | uint32_t flags, rp_status; |
| 1468 | |
| 1469 | BT_CLOGD("Requesting data from stream: cmd=%s, " |
| 1470 | "offset=%" PRIu64 ", request-len=%" PRIu64, |
| 1471 | lttng_viewer_command_string(LTTNG_VIEWER_GET_PACKET), offset, req_len); |
| 1472 | |
| 1473 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_PACKET); |
| 1474 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); |
| 1475 | cmd.cmd_version = htobe32(0); |
| 1476 | |
| 1477 | memset(&rq, 0, sizeof(rq)); |
| 1478 | rq.stream_id = htobe64(stream->viewer_stream_id); |
| 1479 | rq.offset = htobe64(offset); |
| 1480 | rq.len = htobe32(req_len); |
| 1481 | |
| 1482 | /* |
| 1483 | * Merge the cmd and connection request to prevent a write-write |
| 1484 | * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the |
| 1485 | * second write to be performed quickly in presence of Nagle's algorithm. |
| 1486 | */ |
| 1487 | memcpy(cmd_buf, &cmd, sizeof(cmd)); |
| 1488 | memcpy(cmd_buf + sizeof(cmd), &rq, sizeof(rq)); |
| 1489 | |
| 1490 | viewer_status = lttng_live_send(viewer_connection, &cmd_buf, cmd_buf_len); |
| 1491 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { |
| 1492 | viewer_handle_send_status(logCfg, viewer_status, "get data packet command"); |
| 1493 | goto error_convert_status; |
| 1494 | } |
| 1495 | |
| 1496 | viewer_status = lttng_live_recv(viewer_connection, &rp, sizeof(rp)); |
| 1497 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { |
| 1498 | viewer_handle_recv_status(logCfg, viewer_status, "get data packet reply"); |
| 1499 | goto error_convert_status; |
| 1500 | } |
| 1501 | |
| 1502 | flags = be32toh(rp.flags); |
| 1503 | rp_status = be32toh(rp.status); |
| 1504 | |
| 1505 | BT_CLOGD("Received response from relay daemon: cmd=%s, response=%s", |
| 1506 | lttng_viewer_command_string(LTTNG_VIEWER_GET_PACKET), |
| 1507 | lttng_viewer_get_packet_return_code_string(rp_status)); |
| 1508 | switch (rp_status) { |
| 1509 | case LTTNG_VIEWER_GET_PACKET_OK: |
| 1510 | req_len = be32toh(rp.len); |
| 1511 | BT_CLOGD("Got packet from relay daemon: response=%s, packet-len=%" PRIu64 "", |
| 1512 | lttng_viewer_get_packet_return_code_string(rp_status), req_len); |
| 1513 | break; |
| 1514 | case LTTNG_VIEWER_GET_PACKET_RETRY: |
| 1515 | /* Unimplemented by relay daemon */ |
| 1516 | status = CTF_MSG_ITER_MEDIUM_STATUS_AGAIN; |
| 1517 | goto end; |
| 1518 | case LTTNG_VIEWER_GET_PACKET_ERR: |
| 1519 | if (flags & LTTNG_VIEWER_FLAG_NEW_METADATA) { |
| 1520 | BT_CLOGD("Marking trace as needing new metadata: " |
| 1521 | "response=%s, response-flag=NEW_METADATA, trace-id=%" PRIu64, |
| 1522 | lttng_viewer_next_index_return_code_string(rp_status), trace->id); |
| 1523 | trace->metadata_stream_state = LTTNG_LIVE_METADATA_STREAM_STATE_NEEDED; |
| 1524 | } |
| 1525 | if (flags & LTTNG_VIEWER_FLAG_NEW_STREAM) { |
| 1526 | BT_CLOGD("Marking all sessions as possibly needing new streams: " |
| 1527 | "response=%s, response-flag=NEW_STREAM", |
| 1528 | lttng_viewer_next_index_return_code_string(rp_status)); |
| 1529 | lttng_live_need_new_streams(lttng_live_msg_iter); |
| 1530 | } |
| 1531 | if (flags & (LTTNG_VIEWER_FLAG_NEW_METADATA | LTTNG_VIEWER_FLAG_NEW_STREAM)) { |
| 1532 | status = CTF_MSG_ITER_MEDIUM_STATUS_AGAIN; |
| 1533 | BT_CLOGD("Reply with any one flags set means we should retry: response=%s", |
| 1534 | lttng_viewer_get_packet_return_code_string(rp_status)); |
| 1535 | goto end; |
| 1536 | } |
| 1537 | BT_CLOGE_APPEND_CAUSE("Received get_data_packet response: error"); |
| 1538 | status = CTF_MSG_ITER_MEDIUM_STATUS_ERROR; |
| 1539 | goto end; |
| 1540 | case LTTNG_VIEWER_GET_PACKET_EOF: |
| 1541 | status = CTF_MSG_ITER_MEDIUM_STATUS_EOF; |
| 1542 | goto end; |
| 1543 | default: |
| 1544 | BT_CLOGE_APPEND_CAUSE("Received get_data_packet response: unknown (%d)", rp_status); |
| 1545 | status = CTF_MSG_ITER_MEDIUM_STATUS_ERROR; |
| 1546 | goto end; |
| 1547 | } |
| 1548 | |
| 1549 | if (req_len == 0) { |
| 1550 | status = CTF_MSG_ITER_MEDIUM_STATUS_ERROR; |
| 1551 | goto end; |
| 1552 | } |
| 1553 | |
| 1554 | viewer_status = lttng_live_recv(viewer_connection, buf, req_len); |
| 1555 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { |
| 1556 | viewer_handle_recv_status(logCfg, viewer_status, "get data packet"); |
| 1557 | goto error_convert_status; |
| 1558 | } |
| 1559 | *recv_len = req_len; |
| 1560 | |
| 1561 | status = CTF_MSG_ITER_MEDIUM_STATUS_OK; |
| 1562 | goto end; |
| 1563 | |
| 1564 | error_convert_status: |
| 1565 | status = viewer_status_to_ctf_msg_iter_medium_status(viewer_status); |
| 1566 | end: |
| 1567 | return status; |
| 1568 | } |
| 1569 | |
| 1570 | /* |
| 1571 | * Request new streams for a session. |
| 1572 | */ |
| 1573 | BT_HIDDEN |
| 1574 | enum lttng_live_iterator_status |
| 1575 | lttng_live_session_get_new_streams(struct lttng_live_session *session, |
| 1576 | bt_self_message_iterator *self_msg_iter) |
| 1577 | { |
| 1578 | enum lttng_live_iterator_status status = LTTNG_LIVE_ITERATOR_STATUS_OK; |
| 1579 | struct lttng_viewer_cmd cmd; |
| 1580 | struct lttng_viewer_new_streams_request rq; |
| 1581 | struct lttng_viewer_new_streams_response rp; |
| 1582 | struct lttng_live_msg_iter *lttng_live_msg_iter = session->lttng_live_msg_iter; |
| 1583 | enum lttng_live_viewer_status viewer_status; |
| 1584 | struct live_viewer_connection *viewer_connection = lttng_live_msg_iter->viewer_connection; |
| 1585 | const bt2_common::LogCfg& logCfg = lttng_live_msg_iter->logCfg; |
| 1586 | uint32_t streams_count; |
| 1587 | const size_t cmd_buf_len = sizeof(cmd) + sizeof(rq); |
| 1588 | char cmd_buf[cmd_buf_len]; |
| 1589 | |
| 1590 | if (!session->new_streams_needed) { |
| 1591 | status = LTTNG_LIVE_ITERATOR_STATUS_OK; |
| 1592 | goto end; |
| 1593 | } |
| 1594 | |
| 1595 | BT_CLOGD("Requesting new streams for session: cmd=%s, " |
| 1596 | "session-id=%" PRIu64, |
| 1597 | lttng_viewer_command_string(LTTNG_VIEWER_GET_NEW_STREAMS), session->id); |
| 1598 | |
| 1599 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_NEW_STREAMS); |
| 1600 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); |
| 1601 | cmd.cmd_version = htobe32(0); |
| 1602 | |
| 1603 | memset(&rq, 0, sizeof(rq)); |
| 1604 | rq.session_id = htobe64(session->id); |
| 1605 | |
| 1606 | /* |
| 1607 | * Merge the cmd and connection request to prevent a write-write |
| 1608 | * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the |
| 1609 | * second write to be performed quickly in presence of Nagle's algorithm. |
| 1610 | */ |
| 1611 | memcpy(cmd_buf, &cmd, sizeof(cmd)); |
| 1612 | memcpy(cmd_buf + sizeof(cmd), &rq, sizeof(rq)); |
| 1613 | |
| 1614 | viewer_status = lttng_live_send(viewer_connection, &cmd_buf, cmd_buf_len); |
| 1615 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { |
| 1616 | viewer_handle_send_status(logCfg, viewer_status, "get new streams command"); |
| 1617 | status = viewer_status_to_live_iterator_status(viewer_status); |
| 1618 | goto end; |
| 1619 | } |
| 1620 | |
| 1621 | viewer_status = lttng_live_recv(viewer_connection, &rp, sizeof(rp)); |
| 1622 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { |
| 1623 | viewer_handle_recv_status(logCfg, viewer_status, "get new streams reply"); |
| 1624 | status = viewer_status_to_live_iterator_status(viewer_status); |
| 1625 | goto end; |
| 1626 | } |
| 1627 | |
| 1628 | streams_count = be32toh(rp.streams_count); |
| 1629 | |
| 1630 | switch (be32toh(rp.status)) { |
| 1631 | case LTTNG_VIEWER_NEW_STREAMS_OK: |
| 1632 | session->new_streams_needed = false; |
| 1633 | break; |
| 1634 | case LTTNG_VIEWER_NEW_STREAMS_NO_NEW: |
| 1635 | session->new_streams_needed = false; |
| 1636 | goto end; |
| 1637 | case LTTNG_VIEWER_NEW_STREAMS_HUP: |
| 1638 | session->new_streams_needed = false; |
| 1639 | session->closed = true; |
| 1640 | status = LTTNG_LIVE_ITERATOR_STATUS_END; |
| 1641 | goto end; |
| 1642 | case LTTNG_VIEWER_NEW_STREAMS_ERR: |
| 1643 | BT_CLOGD("Received get_new_streams response: error"); |
| 1644 | status = LTTNG_LIVE_ITERATOR_STATUS_ERROR; |
| 1645 | goto end; |
| 1646 | default: |
| 1647 | BT_CLOGE_APPEND_CAUSE("Received get_new_streams response: Unknown:" |
| 1648 | "return code %u", |
| 1649 | be32toh(rp.status)); |
| 1650 | status = LTTNG_LIVE_ITERATOR_STATUS_ERROR; |
| 1651 | goto end; |
| 1652 | } |
| 1653 | |
| 1654 | viewer_status = receive_streams(session, streams_count, self_msg_iter); |
| 1655 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { |
| 1656 | viewer_handle_recv_status(logCfg, viewer_status, "new streams"); |
| 1657 | status = viewer_status_to_live_iterator_status(viewer_status); |
| 1658 | goto end; |
| 1659 | } |
| 1660 | |
| 1661 | status = LTTNG_LIVE_ITERATOR_STATUS_OK; |
| 1662 | end: |
| 1663 | return status; |
| 1664 | } |
| 1665 | |
| 1666 | BT_HIDDEN |
| 1667 | enum lttng_live_viewer_status live_viewer_connection_create( |
| 1668 | const char *url, bool in_query, struct lttng_live_msg_iter *lttng_live_msg_iter, |
| 1669 | const bt2_common::LogCfg& logCfg, struct live_viewer_connection **viewer) |
| 1670 | { |
| 1671 | enum lttng_live_viewer_status status; |
| 1672 | |
| 1673 | live_viewer_connection *viewer_connection = new live_viewer_connection {logCfg}; |
| 1674 | |
| 1675 | if (bt_socket_init(logCfg.logLevel()) != 0) { |
| 1676 | BT_CLOGE_APPEND_CAUSE("Failed to init socket"); |
| 1677 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
| 1678 | goto error; |
| 1679 | } |
| 1680 | |
| 1681 | viewer_connection->control_sock = BT_INVALID_SOCKET; |
| 1682 | viewer_connection->port = -1; |
| 1683 | viewer_connection->in_query = in_query; |
| 1684 | viewer_connection->lttng_live_msg_iter = lttng_live_msg_iter; |
| 1685 | viewer_connection->url = url; |
| 1686 | |
| 1687 | BT_CLOGD("Establishing connection to url \"%s\"...", url); |
| 1688 | status = lttng_live_connect_viewer(viewer_connection); |
| 1689 | /* |
| 1690 | * Only print error and append cause in case of error. not in case of |
| 1691 | * interruption. |
| 1692 | */ |
| 1693 | if (status == LTTNG_LIVE_VIEWER_STATUS_ERROR) { |
| 1694 | BT_CLOGE_APPEND_CAUSE("Failed to establish connection: " |
| 1695 | "url=\"%s\"", |
| 1696 | url); |
| 1697 | goto error; |
| 1698 | } else if (status == LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED) { |
| 1699 | goto error; |
| 1700 | } |
| 1701 | BT_CLOGD("Connection to url \"%s\" is established", url); |
| 1702 | |
| 1703 | *viewer = viewer_connection; |
| 1704 | status = LTTNG_LIVE_VIEWER_STATUS_OK; |
| 1705 | goto end; |
| 1706 | |
| 1707 | error: |
| 1708 | delete viewer_connection; |
| 1709 | |
| 1710 | end: |
| 1711 | return status; |
| 1712 | } |
| 1713 | |
| 1714 | live_viewer_connection::~live_viewer_connection() |
| 1715 | { |
| 1716 | BT_CLOGD("Closing connection to relay:" |
| 1717 | "relay-url=\"%s\"", |
| 1718 | this->url.c_str()); |
| 1719 | |
| 1720 | lttng_live_disconnect_viewer(this); |
| 1721 | |
| 1722 | bt_socket_fini(); |
| 1723 | } |