Commit | Line | Data |
---|---|---|
7cdc2bab | 1 | /* |
0235b0db | 2 | * SPDX-License-Identifier: MIT |
7cdc2bab | 3 | * |
0235b0db MJ |
4 | * Copyright 2019 Francis Deslauriers <francis.deslauriers@efficios.com> |
5 | * Copyright 2016 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
7cdc2bab MD |
6 | */ |
7 | ||
c802cacb | 8 | #include <glib.h> |
7cdc2bab | 9 | #include <stdint.h> |
3c22a242 | 10 | #include <stdio.h> |
3c22a242 | 11 | |
c802cacb SM |
12 | #include <babeltrace2/babeltrace.h> |
13 | ||
578e048b | 14 | #include "common/common.h" |
83ad336c | 15 | #include "compat/endian.h" /* IWYU pragma: keep */ |
d721bef8 | 16 | #include "cpp-common/bt2s/make-unique.hpp" |
7cdc2bab | 17 | |
c802cacb | 18 | #include "data-stream.hpp" |
087cd0f5 | 19 | #include "lttng-live.hpp" |
087cd0f5 | 20 | #include "lttng-viewer-abi.hpp" |
087cd0f5 | 21 | #include "metadata.hpp" |
c802cacb | 22 | #include "viewer-connection.hpp" |
7cdc2bab | 23 | |
0f5c5d5c | 24 | #define viewer_handle_send_recv_status(_status, _action, _msg_str) \ |
4164020e SM |
25 | do { \ |
26 | switch (_status) { \ | |
27 | case LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED: \ | |
28 | break; \ | |
29 | case LTTNG_LIVE_VIEWER_STATUS_ERROR: \ | |
0f5c5d5c SM |
30 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, \ |
31 | "Error " _action " " _msg_str); \ | |
4164020e SM |
32 | break; \ |
33 | default: \ | |
34 | bt_common_abort(); \ | |
35 | } \ | |
36 | } while (0) | |
37 | ||
0f5c5d5c SM |
38 | #define viewer_handle_send_status(_status, _msg_str) \ |
39 | viewer_handle_send_recv_status(_status, "sending", _msg_str) | |
4164020e | 40 | |
0f5c5d5c SM |
41 | #define viewer_handle_recv_status(_status, _msg_str) \ |
42 | viewer_handle_send_recv_status(_status, "receiving", _msg_str) | |
4164020e | 43 | |
0f5c5d5c | 44 | #define LTTNG_LIVE_CPPLOGE_APPEND_CAUSE_ERRNO(_msg, _fmt, ...) \ |
4164020e | 45 | do { \ |
0f5c5d5c SM |
46 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, _msg ": {}" _fmt, \ |
47 | bt_socket_errormsg(), ##__VA_ARGS__); \ | |
4164020e SM |
48 | } while (0) |
49 | ||
4164020e SM |
50 | static inline enum lttng_live_iterator_status |
51 | viewer_status_to_live_iterator_status(enum lttng_live_viewer_status viewer_status) | |
f79c2d7a | 52 | { |
4164020e SM |
53 | switch (viewer_status) { |
54 | case LTTNG_LIVE_VIEWER_STATUS_OK: | |
55 | return LTTNG_LIVE_ITERATOR_STATUS_OK; | |
56 | case LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED: | |
57 | return LTTNG_LIVE_ITERATOR_STATUS_AGAIN; | |
58 | case LTTNG_LIVE_VIEWER_STATUS_ERROR: | |
59 | return LTTNG_LIVE_ITERATOR_STATUS_ERROR; | |
60 | } | |
61 | ||
62 | bt_common_abort(); | |
f79c2d7a FD |
63 | } |
64 | ||
4164020e SM |
65 | static inline enum ctf_msg_iter_medium_status |
66 | viewer_status_to_ctf_msg_iter_medium_status(enum lttng_live_viewer_status viewer_status) | |
f79c2d7a | 67 | { |
4164020e SM |
68 | switch (viewer_status) { |
69 | case LTTNG_LIVE_VIEWER_STATUS_OK: | |
70 | return CTF_MSG_ITER_MEDIUM_STATUS_OK; | |
71 | case LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED: | |
72 | return CTF_MSG_ITER_MEDIUM_STATUS_AGAIN; | |
73 | case LTTNG_LIVE_VIEWER_STATUS_ERROR: | |
74 | return CTF_MSG_ITER_MEDIUM_STATUS_ERROR; | |
75 | } | |
76 | ||
77 | bt_common_abort(); | |
f79c2d7a FD |
78 | } |
79 | ||
4164020e | 80 | static inline void viewer_connection_close_socket(struct live_viewer_connection *viewer_connection) |
b197ca37 | 81 | { |
4164020e SM |
82 | int ret = bt_socket_close(viewer_connection->control_sock); |
83 | if (ret == -1) { | |
0f5c5d5c SM |
84 | BT_CPPLOGW_ERRNO_SPEC(viewer_connection->logger, |
85 | "Error closing viewer connection socket: ", "."); | |
4164020e SM |
86 | } |
87 | ||
88 | viewer_connection->control_sock = BT_INVALID_SOCKET; | |
b197ca37 FD |
89 | } |
90 | ||
f79c2d7a FD |
91 | /* |
92 | * This function receives a message from the Relay daemon. | |
93 | * If it received the entire message, it returns _OK, | |
94 | * If it's interrupted, it returns _INTERRUPTED, | |
95 | * otherwise, it returns _ERROR. | |
96 | */ | |
4164020e SM |
97 | static enum lttng_live_viewer_status |
98 | lttng_live_recv(struct live_viewer_connection *viewer_connection, void *buf, size_t len) | |
7cdc2bab | 99 | { |
4164020e | 100 | ssize_t received; |
4164020e SM |
101 | size_t total_received = 0, to_receive = len; |
102 | struct lttng_live_msg_iter *lttng_live_msg_iter = viewer_connection->lttng_live_msg_iter; | |
103 | enum lttng_live_viewer_status status; | |
104 | BT_SOCKET sock = viewer_connection->control_sock; | |
105 | ||
106 | /* | |
107 | * Receive a message from the Relay. | |
108 | */ | |
109 | do { | |
110 | received = bt_socket_recv(sock, (char *) buf + total_received, to_receive, 0); | |
111 | if (received == BT_SOCKET_ERROR) { | |
112 | if (bt_socket_interrupted()) { | |
113 | if (lttng_live_graph_is_canceled(lttng_live_msg_iter)) { | |
114 | /* | |
115 | * This interruption was due to a | |
116 | * SIGINT and the graph is being torn | |
117 | * down. | |
118 | */ | |
119 | status = LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED; | |
120 | lttng_live_msg_iter->was_interrupted = true; | |
121 | goto end; | |
122 | } else { | |
123 | /* | |
124 | * A signal was received, but the graph | |
125 | * is not being torn down. Carry on. | |
126 | */ | |
127 | continue; | |
128 | } | |
129 | } else { | |
130 | /* | |
131 | * For any other types of socket error, close | |
132 | * the socket and return an error. | |
133 | */ | |
0f5c5d5c | 134 | LTTNG_LIVE_CPPLOGE_APPEND_CAUSE_ERRNO("Error receiving from Relay", "."); |
4164020e SM |
135 | |
136 | viewer_connection_close_socket(viewer_connection); | |
137 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; | |
138 | goto end; | |
139 | } | |
140 | } else if (received == 0) { | |
141 | /* | |
142 | * The recv() call returned 0. This means the | |
143 | * connection was orderly shutdown from the other peer. | |
144 | * If that happens when we are trying to receive | |
145 | * a message from it, it means something when wrong. | |
146 | * Close the socket and return an error. | |
147 | */ | |
0f5c5d5c SM |
148 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
149 | "Remote side has closed connection"); | |
4164020e SM |
150 | viewer_connection_close_socket(viewer_connection); |
151 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; | |
152 | goto end; | |
153 | } | |
154 | ||
155 | BT_ASSERT(received <= to_receive); | |
156 | total_received += received; | |
157 | to_receive -= received; | |
158 | ||
159 | } while (to_receive > 0); | |
160 | ||
161 | BT_ASSERT(total_received == len); | |
162 | status = LTTNG_LIVE_VIEWER_STATUS_OK; | |
f79c2d7a FD |
163 | |
164 | end: | |
4164020e | 165 | return status; |
7cdc2bab MD |
166 | } |
167 | ||
f79c2d7a FD |
168 | /* |
169 | * This function sends a message to the Relay daemon. | |
170 | * If it send the message, it returns _OK, | |
171 | * If it's interrupted, it returns _INTERRUPTED, | |
172 | * otherwise, it returns _ERROR. | |
173 | */ | |
4164020e SM |
174 | static enum lttng_live_viewer_status |
175 | lttng_live_send(struct live_viewer_connection *viewer_connection, const void *buf, size_t len) | |
7cdc2bab | 176 | { |
4164020e | 177 | enum lttng_live_viewer_status status; |
4164020e SM |
178 | struct lttng_live_msg_iter *lttng_live_msg_iter = viewer_connection->lttng_live_msg_iter; |
179 | BT_SOCKET sock = viewer_connection->control_sock; | |
180 | size_t to_send = len; | |
181 | ssize_t total_sent = 0; | |
182 | ||
183 | do { | |
184 | ssize_t sent = bt_socket_send_nosigpipe(sock, (char *) buf + total_sent, to_send); | |
185 | if (sent == BT_SOCKET_ERROR) { | |
186 | if (bt_socket_interrupted()) { | |
187 | if (lttng_live_graph_is_canceled(lttng_live_msg_iter)) { | |
188 | /* | |
189 | * This interruption was a SIGINT and | |
190 | * the graph is being teared down. | |
191 | */ | |
192 | status = LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED; | |
193 | lttng_live_msg_iter->was_interrupted = true; | |
194 | goto end; | |
195 | } else { | |
196 | /* | |
197 | * A signal was received, but the graph | |
198 | * is not being teared down. Carry on. | |
199 | */ | |
200 | continue; | |
201 | } | |
202 | } else { | |
203 | /* | |
204 | * For any other types of socket error, close | |
205 | * the socket and return an error. | |
206 | */ | |
0f5c5d5c | 207 | LTTNG_LIVE_CPPLOGE_APPEND_CAUSE_ERRNO("Error sending to Relay", "."); |
4164020e SM |
208 | |
209 | viewer_connection_close_socket(viewer_connection); | |
210 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; | |
211 | goto end; | |
212 | } | |
213 | } | |
214 | ||
215 | BT_ASSERT(sent <= to_send); | |
216 | total_sent += sent; | |
217 | to_send -= sent; | |
218 | ||
219 | } while (to_send > 0); | |
220 | ||
221 | BT_ASSERT(total_sent == len); | |
222 | status = LTTNG_LIVE_VIEWER_STATUS_OK; | |
f79c2d7a FD |
223 | |
224 | end: | |
4164020e | 225 | return status; |
7cdc2bab MD |
226 | } |
227 | ||
4164020e | 228 | static int parse_url(struct live_viewer_connection *viewer_connection) |
7cdc2bab | 229 | { |
4164020e | 230 | char error_buf[256] = {0}; |
dd420a9b | 231 | struct bt_common_lttng_live_url_parts lttng_live_url_parts = {}; |
9d0b798a | 232 | bt_common_lttng_live_url_parts_deleter partsDeleter {lttng_live_url_parts}; |
4164020e | 233 | int ret = -1; |
4164020e | 234 | |
30d81897 | 235 | if (viewer_connection->url.empty()) { |
4164020e SM |
236 | goto end; |
237 | } | |
238 | ||
30d81897 SM |
239 | lttng_live_url_parts = bt_common_parse_lttng_live_url(viewer_connection->url.c_str(), error_buf, |
240 | sizeof(error_buf)); | |
4164020e | 241 | if (!lttng_live_url_parts.proto) { |
0f5c5d5c SM |
242 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Invalid LTTng live URL format: {}", |
243 | error_buf); | |
4164020e SM |
244 | goto end; |
245 | } | |
198e7911 | 246 | viewer_connection->proto.reset(lttng_live_url_parts.proto); |
4164020e SM |
247 | lttng_live_url_parts.proto = NULL; |
248 | ||
198e7911 | 249 | viewer_connection->relay_hostname.reset(lttng_live_url_parts.hostname); |
4164020e SM |
250 | lttng_live_url_parts.hostname = NULL; |
251 | ||
252 | if (lttng_live_url_parts.port >= 0) { | |
253 | viewer_connection->port = lttng_live_url_parts.port; | |
254 | } else { | |
255 | viewer_connection->port = LTTNG_DEFAULT_NETWORK_VIEWER_PORT; | |
256 | } | |
257 | ||
198e7911 | 258 | viewer_connection->target_hostname.reset(lttng_live_url_parts.target_hostname); |
4164020e SM |
259 | lttng_live_url_parts.target_hostname = NULL; |
260 | ||
261 | if (lttng_live_url_parts.session_name) { | |
198e7911 | 262 | viewer_connection->session_name.reset(lttng_live_url_parts.session_name); |
4164020e SM |
263 | lttng_live_url_parts.session_name = NULL; |
264 | } | |
265 | ||
266 | ret = 0; | |
7cdc2bab MD |
267 | |
268 | end: | |
4164020e | 269 | return ret; |
7cdc2bab MD |
270 | } |
271 | ||
4164020e SM |
272 | static enum lttng_live_viewer_status |
273 | lttng_live_handshake(struct live_viewer_connection *viewer_connection) | |
7cdc2bab | 274 | { |
4164020e SM |
275 | struct lttng_viewer_cmd cmd; |
276 | struct lttng_viewer_connect connect; | |
277 | enum lttng_live_viewer_status status; | |
4164020e SM |
278 | const size_t cmd_buf_len = sizeof(cmd) + sizeof(connect); |
279 | char cmd_buf[cmd_buf_len]; | |
280 | ||
0f5c5d5c SM |
281 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
282 | "Handshaking with the relay daemon: cmd={}, major-version={}, minor-version={}", | |
283 | LTTNG_VIEWER_CONNECT, LTTNG_LIVE_MAJOR, LTTNG_LIVE_MINOR); | |
4164020e SM |
284 | |
285 | cmd.cmd = htobe32(LTTNG_VIEWER_CONNECT); | |
286 | cmd.data_size = htobe64((uint64_t) sizeof(connect)); | |
287 | cmd.cmd_version = htobe32(0); | |
288 | ||
289 | connect.viewer_session_id = -1ULL; /* will be set on recv */ | |
290 | connect.major = htobe32(LTTNG_LIVE_MAJOR); | |
291 | connect.minor = htobe32(LTTNG_LIVE_MINOR); | |
292 | connect.type = htobe32(LTTNG_VIEWER_CLIENT_COMMAND); | |
293 | ||
294 | /* | |
295 | * Merge the cmd and connection request to prevent a write-write | |
296 | * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the | |
297 | * second write to be performed quickly in presence of Nagle's algorithm | |
298 | */ | |
299 | memcpy(cmd_buf, &cmd, sizeof(cmd)); | |
300 | memcpy(cmd_buf + sizeof(cmd), &connect, sizeof(connect)); | |
301 | ||
302 | status = lttng_live_send(viewer_connection, &cmd_buf, cmd_buf_len); | |
303 | if (status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 304 | viewer_handle_send_status(status, "viewer connect command"); |
4164020e SM |
305 | goto end; |
306 | } | |
307 | ||
308 | status = lttng_live_recv(viewer_connection, &connect, sizeof(connect)); | |
309 | if (status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 310 | viewer_handle_recv_status(status, "viewer connect reply"); |
4164020e SM |
311 | goto end; |
312 | } | |
313 | ||
0f5c5d5c SM |
314 | BT_CPPLOGI_SPEC(viewer_connection->logger, "Received viewer session ID : {}", |
315 | (uint64_t) be64toh(connect.viewer_session_id)); | |
316 | BT_CPPLOGI_SPEC(viewer_connection->logger, "Relayd version : {}.{}", be32toh(connect.major), | |
317 | be32toh(connect.minor)); | |
4164020e SM |
318 | |
319 | if (LTTNG_LIVE_MAJOR != be32toh(connect.major)) { | |
0f5c5d5c SM |
320 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
321 | "Incompatible lttng-relayd protocol"); | |
4164020e SM |
322 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
323 | goto end; | |
324 | } | |
325 | /* Use the smallest protocol version implemented. */ | |
326 | if (LTTNG_LIVE_MINOR > be32toh(connect.minor)) { | |
327 | viewer_connection->minor = be32toh(connect.minor); | |
328 | } else { | |
329 | viewer_connection->minor = LTTNG_LIVE_MINOR; | |
330 | } | |
331 | viewer_connection->major = LTTNG_LIVE_MAJOR; | |
332 | ||
333 | status = LTTNG_LIVE_VIEWER_STATUS_OK; | |
334 | ||
335 | goto end; | |
f79c2d7a FD |
336 | |
337 | end: | |
4164020e | 338 | return status; |
7cdc2bab MD |
339 | } |
340 | ||
4164020e SM |
341 | static enum lttng_live_viewer_status |
342 | lttng_live_connect_viewer(struct live_viewer_connection *viewer_connection) | |
7cdc2bab | 343 | { |
4164020e SM |
344 | struct hostent *host; |
345 | struct sockaddr_in server_addr; | |
346 | enum lttng_live_viewer_status status; | |
4164020e SM |
347 | |
348 | if (parse_url(viewer_connection)) { | |
0f5c5d5c | 349 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Failed to parse URL"); |
4164020e SM |
350 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
351 | goto error; | |
352 | } | |
353 | ||
0f5c5d5c SM |
354 | BT_CPPLOGD_SPEC( |
355 | viewer_connection->logger, | |
356 | "Connecting to hostname : {}, port : {}, target hostname : {}, session name : {}, proto : {}", | |
4164020e SM |
357 | viewer_connection->relay_hostname->str, viewer_connection->port, |
358 | !viewer_connection->target_hostname ? "<none>" : viewer_connection->target_hostname->str, | |
359 | !viewer_connection->session_name ? "<none>" : viewer_connection->session_name->str, | |
360 | viewer_connection->proto->str); | |
361 | ||
362 | host = gethostbyname(viewer_connection->relay_hostname->str); | |
363 | if (!host) { | |
0f5c5d5c SM |
364 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
365 | "Cannot lookup hostname: hostname=\"{}\"", | |
366 | viewer_connection->relay_hostname->str); | |
4164020e SM |
367 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
368 | goto error; | |
369 | } | |
370 | ||
371 | if ((viewer_connection->control_sock = socket(AF_INET, SOCK_STREAM, 0)) == BT_INVALID_SOCKET) { | |
0f5c5d5c SM |
372 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Socket creation failed: {}", |
373 | bt_socket_errormsg()); | |
4164020e SM |
374 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
375 | goto error; | |
376 | } | |
377 | ||
378 | server_addr.sin_family = AF_INET; | |
379 | server_addr.sin_port = htons(viewer_connection->port); | |
380 | server_addr.sin_addr = *((struct in_addr *) host->h_addr); | |
381 | memset(&(server_addr.sin_zero), 0, 8); | |
382 | ||
383 | if (connect(viewer_connection->control_sock, (struct sockaddr *) &server_addr, | |
384 | sizeof(struct sockaddr)) == BT_SOCKET_ERROR) { | |
0f5c5d5c SM |
385 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Connection failed: {}", |
386 | bt_socket_errormsg()); | |
4164020e SM |
387 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
388 | goto error; | |
389 | } | |
390 | ||
391 | status = lttng_live_handshake(viewer_connection); | |
392 | ||
393 | /* | |
394 | * Only print error and append cause in case of error. not in case of | |
395 | * interruption. | |
396 | */ | |
397 | if (status == LTTNG_LIVE_VIEWER_STATUS_ERROR) { | |
0f5c5d5c | 398 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Viewer handshake failed"); |
4164020e SM |
399 | goto error; |
400 | } else if (status == LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED) { | |
401 | goto end; | |
402 | } | |
403 | ||
404 | goto end; | |
7cdc2bab MD |
405 | |
406 | error: | |
4164020e SM |
407 | if (viewer_connection->control_sock != BT_INVALID_SOCKET) { |
408 | if (bt_socket_close(viewer_connection->control_sock) == BT_SOCKET_ERROR) { | |
0f5c5d5c SM |
409 | BT_CPPLOGW_SPEC(viewer_connection->logger, "Error closing socket: {}.", |
410 | bt_socket_errormsg()); | |
4164020e SM |
411 | } |
412 | } | |
413 | viewer_connection->control_sock = BT_INVALID_SOCKET; | |
f79c2d7a | 414 | end: |
4164020e | 415 | return status; |
7cdc2bab MD |
416 | } |
417 | ||
4164020e | 418 | static void lttng_live_disconnect_viewer(struct live_viewer_connection *viewer_connection) |
7cdc2bab | 419 | { |
4164020e SM |
420 | if (viewer_connection->control_sock == BT_INVALID_SOCKET) { |
421 | return; | |
422 | } | |
423 | if (bt_socket_close(viewer_connection->control_sock) == BT_SOCKET_ERROR) { | |
0f5c5d5c SM |
424 | BT_CPPLOGW_SPEC(viewer_connection->logger, "Error closing socket: {}", |
425 | bt_socket_errormsg()); | |
4164020e SM |
426 | viewer_connection->control_sock = BT_INVALID_SOCKET; |
427 | } | |
7cdc2bab MD |
428 | } |
429 | ||
bf35aaef SM |
430 | static int list_update_session(const bt2::ArrayValue results, |
431 | const struct lttng_viewer_session *session, bool *_found, | |
432 | struct live_viewer_connection *viewer_connection) | |
7cdc2bab | 433 | { |
4164020e SM |
434 | bool found = false; |
435 | ||
bf35aaef SM |
436 | for (const auto value : results) { |
437 | const auto map = value.asMap(); | |
438 | const auto hostnameVal = map["target-hostname"]; | |
4164020e | 439 | |
bf35aaef | 440 | if (!hostnameVal) { |
0f5c5d5c SM |
441 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
442 | "Error borrowing \"target-hostname\" entry."); | |
bf35aaef | 443 | return -1; |
4164020e | 444 | } |
bf35aaef SM |
445 | |
446 | const auto sessionNameVal = map["session-name"]; | |
447 | ||
448 | if (!sessionNameVal) { | |
0f5c5d5c SM |
449 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
450 | "Error borrowing \"session-name\" entry."); | |
bf35aaef | 451 | return -1; |
4164020e | 452 | } |
bf35aaef SM |
453 | |
454 | const auto hostname_str = hostnameVal->asString().value(); | |
455 | const auto session_name_str = sessionNameVal->asString().value(); | |
4164020e SM |
456 | |
457 | if (strcmp(session->hostname, hostname_str) == 0 && | |
458 | strcmp(session->session_name, session_name_str) == 0) { | |
4164020e SM |
459 | uint32_t streams = be32toh(session->streams); |
460 | uint32_t clients = be32toh(session->clients); | |
461 | ||
462 | found = true; | |
463 | ||
bf35aaef SM |
464 | const auto streamCountVal = map["stream-count"]; |
465 | ||
466 | if (!streamCountVal) { | |
0f5c5d5c SM |
467 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
468 | "Error borrowing \"stream-count\" entry."); | |
bf35aaef | 469 | return -1; |
4164020e | 470 | } |
bf35aaef SM |
471 | |
472 | auto val = streamCountVal->asUnsignedInteger().value(); | |
473 | ||
4164020e SM |
474 | /* sum */ |
475 | val += streams; | |
bf35aaef | 476 | streamCountVal->asUnsignedInteger().value(val); |
4164020e | 477 | |
bf35aaef SM |
478 | const auto clientCountVal = map["client-count"]; |
479 | ||
480 | if (!clientCountVal) { | |
0f5c5d5c SM |
481 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
482 | "Error borrowing \"client-count\" entry."); | |
bf35aaef | 483 | return -1; |
4164020e | 484 | } |
bf35aaef SM |
485 | |
486 | val = clientCountVal->asUnsignedInteger().value(); | |
487 | ||
4164020e | 488 | /* max */ |
bf35aaef SM |
489 | val = std::max<uint64_t>(clients, val); |
490 | clientCountVal->asUnsignedInteger().value(val); | |
4164020e SM |
491 | } |
492 | ||
493 | if (found) { | |
494 | break; | |
495 | } | |
496 | } | |
bf35aaef | 497 | |
4164020e | 498 | *_found = found; |
bf35aaef | 499 | return 0; |
7cdc2bab MD |
500 | } |
501 | ||
bf35aaef | 502 | static int list_append_session(const bt2::ArrayValue results, const std::string& base_url, |
4164020e SM |
503 | const struct lttng_viewer_session *session, |
504 | struct live_viewer_connection *viewer_connection) | |
7cdc2bab | 505 | { |
4164020e | 506 | int ret = 0; |
4164020e SM |
507 | bool found = false; |
508 | ||
509 | /* | |
510 | * If the session already exists, add the stream count to it, | |
511 | * and do max of client counts. | |
512 | */ | |
513 | ret = list_update_session(results, session, &found, viewer_connection); | |
514 | if (ret || found) { | |
bf35aaef | 515 | return ret; |
4164020e SM |
516 | } |
517 | ||
bf35aaef | 518 | const auto map = bt2::MapValue::create(); |
4164020e | 519 | |
30d81897 | 520 | if (base_url.empty()) { |
bf35aaef SM |
521 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Error: base_url empty."); |
522 | return -1; | |
4164020e | 523 | } |
30d81897 | 524 | |
4164020e SM |
525 | /* |
526 | * key = "url", | |
527 | * value = <string>, | |
528 | */ | |
bf35aaef SM |
529 | map->insert("url", |
530 | fmt::format("{}/host/{}/{}", base_url, session->hostname, session->session_name)); | |
4164020e SM |
531 | |
532 | /* | |
533 | * key = "target-hostname", | |
534 | * value = <string>, | |
535 | */ | |
bf35aaef | 536 | map->insert("target-hostname", session->hostname); |
4164020e SM |
537 | |
538 | /* | |
539 | * key = "session-name", | |
540 | * value = <string>, | |
541 | */ | |
bf35aaef | 542 | map->insert("session-name", session->session_name); |
4164020e SM |
543 | |
544 | /* | |
545 | * key = "timer-us", | |
546 | * value = <integer>, | |
547 | */ | |
548 | { | |
549 | uint32_t live_timer = be32toh(session->live_timer); | |
550 | ||
bf35aaef | 551 | map->insert("timer-us", (uint64_t) live_timer); |
4164020e SM |
552 | } |
553 | ||
554 | /* | |
555 | * key = "stream-count", | |
556 | * value = <integer>, | |
557 | */ | |
558 | { | |
559 | uint32_t streams = be32toh(session->streams); | |
560 | ||
bf35aaef | 561 | map->insert("stream-count", (uint64_t) streams); |
4164020e SM |
562 | } |
563 | ||
564 | /* | |
565 | * key = "client-count", | |
566 | * value = <integer>, | |
567 | */ | |
568 | { | |
569 | uint32_t clients = be32toh(session->clients); | |
570 | ||
bf35aaef | 571 | map->insert("client-count", (uint64_t) clients); |
4164020e | 572 | } |
14f28187 | 573 | |
bf35aaef SM |
574 | results.append(*map); |
575 | return 0; | |
7cdc2bab MD |
576 | } |
577 | ||
578 | /* | |
579 | * Data structure returned: | |
580 | * | |
581 | * { | |
582 | * <array> = { | |
583 | * [n] = { | |
584 | * <map> = { | |
585 | * { | |
586 | * key = "url", | |
587 | * value = <string>, | |
588 | * }, | |
589 | * { | |
590 | * key = "target-hostname", | |
591 | * value = <string>, | |
592 | * }, | |
593 | * { | |
594 | * key = "session-name", | |
595 | * value = <string>, | |
596 | * }, | |
597 | * { | |
598 | * key = "timer-us", | |
599 | * value = <integer>, | |
600 | * }, | |
601 | * { | |
602 | * key = "stream-count", | |
603 | * value = <integer>, | |
604 | * }, | |
605 | * { | |
606 | * key = "client-count", | |
607 | * value = <integer>, | |
608 | * }, | |
609 | * }, | |
610 | * } | |
611 | * } | |
612 | */ | |
613 | ||
5ad6219b SM |
614 | bt2::Value::Shared |
615 | live_viewer_connection_list_sessions(struct live_viewer_connection *viewer_connection) | |
7cdc2bab | 616 | { |
4164020e SM |
617 | enum lttng_live_viewer_status viewer_status; |
618 | struct lttng_viewer_cmd cmd; | |
619 | struct lttng_viewer_list_sessions list; | |
620 | uint32_t i, sessions_count; | |
bf35aaef | 621 | auto result = bt2::ArrayValue::create(); |
4164020e | 622 | |
0f5c5d5c SM |
623 | BT_CPPLOGD_SPEC(viewer_connection->logger, "Requesting list of sessions: cmd={}", |
624 | LTTNG_VIEWER_LIST_SESSIONS); | |
4164020e SM |
625 | |
626 | cmd.cmd = htobe32(LTTNG_VIEWER_LIST_SESSIONS); | |
627 | cmd.data_size = htobe64((uint64_t) 0); | |
628 | cmd.cmd_version = htobe32(0); | |
629 | ||
630 | viewer_status = lttng_live_send(viewer_connection, &cmd, sizeof(cmd)); | |
631 | if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_ERROR) { | |
5ad6219b SM |
632 | BT_CPPLOGE_APPEND_CAUSE_AND_THROW_SPEC(viewer_connection->logger, bt2::Error, |
633 | "Error sending list sessions command"); | |
4164020e | 634 | } else if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED) { |
5ad6219b | 635 | throw bt2c::TryAgain {}; |
4164020e SM |
636 | } |
637 | ||
638 | viewer_status = lttng_live_recv(viewer_connection, &list, sizeof(list)); | |
639 | if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_ERROR) { | |
5ad6219b SM |
640 | BT_CPPLOGE_APPEND_CAUSE_AND_THROW_SPEC(viewer_connection->logger, bt2::Error, |
641 | "Error receiving session list"); | |
4164020e | 642 | } else if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED) { |
5ad6219b | 643 | throw bt2c::TryAgain {}; |
4164020e SM |
644 | } |
645 | ||
646 | sessions_count = be32toh(list.sessions_count); | |
647 | for (i = 0; i < sessions_count; i++) { | |
648 | struct lttng_viewer_session lsession; | |
649 | ||
650 | viewer_status = lttng_live_recv(viewer_connection, &lsession, sizeof(lsession)); | |
651 | if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_ERROR) { | |
5ad6219b SM |
652 | BT_CPPLOGE_APPEND_CAUSE_AND_THROW_SPEC(viewer_connection->logger, bt2::Error, |
653 | "Error receiving session:"); | |
4164020e | 654 | } else if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED) { |
5ad6219b | 655 | throw bt2c::TryAgain {}; |
4164020e SM |
656 | } |
657 | ||
658 | lsession.hostname[LTTNG_VIEWER_HOST_NAME_MAX - 1] = '\0'; | |
659 | lsession.session_name[LTTNG_VIEWER_NAME_MAX - 1] = '\0'; | |
bf35aaef | 660 | if (list_append_session(*result, viewer_connection->url, &lsession, viewer_connection)) { |
5ad6219b SM |
661 | BT_CPPLOGE_APPEND_CAUSE_AND_THROW_SPEC(viewer_connection->logger, bt2::Error, |
662 | "Error appending session"); | |
4164020e SM |
663 | } |
664 | } | |
665 | ||
5ad6219b | 666 | return result; |
7cdc2bab MD |
667 | } |
668 | ||
4164020e SM |
669 | static enum lttng_live_viewer_status |
670 | lttng_live_query_session_ids(struct lttng_live_msg_iter *lttng_live_msg_iter) | |
7cdc2bab | 671 | { |
4164020e SM |
672 | struct lttng_viewer_cmd cmd; |
673 | struct lttng_viewer_list_sessions list; | |
674 | struct lttng_viewer_session lsession; | |
675 | uint32_t i, sessions_count; | |
676 | uint64_t session_id; | |
677 | enum lttng_live_viewer_status status; | |
d721bef8 | 678 | live_viewer_connection *viewer_connection = lttng_live_msg_iter->viewer_connection.get(); |
4164020e | 679 | |
0f5c5d5c SM |
680 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
681 | "Asking the relay daemon for the list of sessions: cmd={}", | |
682 | LTTNG_VIEWER_LIST_SESSIONS); | |
4164020e SM |
683 | |
684 | cmd.cmd = htobe32(LTTNG_VIEWER_LIST_SESSIONS); | |
685 | cmd.data_size = htobe64((uint64_t) 0); | |
686 | cmd.cmd_version = htobe32(0); | |
687 | ||
688 | status = lttng_live_send(viewer_connection, &cmd, sizeof(cmd)); | |
689 | if (status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 690 | viewer_handle_send_status(status, "list sessions command"); |
4164020e SM |
691 | goto end; |
692 | } | |
693 | ||
694 | status = lttng_live_recv(viewer_connection, &list, sizeof(list)); | |
695 | if (status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 696 | viewer_handle_recv_status(status, "session list reply"); |
4164020e SM |
697 | goto end; |
698 | } | |
699 | ||
700 | sessions_count = be32toh(list.sessions_count); | |
701 | for (i = 0; i < sessions_count; i++) { | |
702 | status = lttng_live_recv(viewer_connection, &lsession, sizeof(lsession)); | |
703 | if (status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 704 | viewer_handle_recv_status(status, "session reply"); |
4164020e SM |
705 | goto end; |
706 | } | |
707 | lsession.hostname[LTTNG_VIEWER_HOST_NAME_MAX - 1] = '\0'; | |
708 | lsession.session_name[LTTNG_VIEWER_NAME_MAX - 1] = '\0'; | |
709 | session_id = be64toh(lsession.id); | |
710 | ||
0f5c5d5c SM |
711 | BT_CPPLOGI_SPEC(viewer_connection->logger, |
712 | "Adding session to internal list: " | |
713 | "session-id={}, hostname=\"{}\", session-name=\"{}\"", | |
714 | session_id, lsession.hostname, lsession.session_name); | |
4164020e SM |
715 | |
716 | if ((strncmp(lsession.session_name, viewer_connection->session_name->str, | |
717 | LTTNG_VIEWER_NAME_MAX) == 0) && | |
718 | (strncmp(lsession.hostname, viewer_connection->target_hostname->str, | |
719 | LTTNG_VIEWER_HOST_NAME_MAX) == 0)) { | |
720 | if (lttng_live_add_session(lttng_live_msg_iter, session_id, lsession.hostname, | |
721 | lsession.session_name)) { | |
0f5c5d5c SM |
722 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
723 | "Failed to add live session"); | |
4164020e SM |
724 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
725 | goto end; | |
726 | } | |
727 | } | |
728 | } | |
729 | ||
730 | status = LTTNG_LIVE_VIEWER_STATUS_OK; | |
7cdc2bab | 731 | |
f79c2d7a | 732 | end: |
4164020e | 733 | return status; |
7cdc2bab MD |
734 | } |
735 | ||
4164020e SM |
736 | enum lttng_live_viewer_status |
737 | lttng_live_create_viewer_session(struct lttng_live_msg_iter *lttng_live_msg_iter) | |
7cdc2bab | 738 | { |
4164020e SM |
739 | struct lttng_viewer_cmd cmd; |
740 | struct lttng_viewer_create_session_response resp; | |
741 | enum lttng_live_viewer_status status; | |
d721bef8 | 742 | live_viewer_connection *viewer_connection = lttng_live_msg_iter->viewer_connection.get(); |
4164020e | 743 | |
0f5c5d5c SM |
744 | BT_CPPLOGD_SPEC(viewer_connection->logger, "Creating a viewer session: cmd={}", |
745 | LTTNG_VIEWER_CREATE_SESSION); | |
4164020e SM |
746 | |
747 | cmd.cmd = htobe32(LTTNG_VIEWER_CREATE_SESSION); | |
748 | cmd.data_size = htobe64((uint64_t) 0); | |
749 | cmd.cmd_version = htobe32(0); | |
750 | ||
751 | status = lttng_live_send(viewer_connection, &cmd, sizeof(cmd)); | |
752 | if (status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 753 | viewer_handle_send_status(status, "create session command"); |
4164020e SM |
754 | goto end; |
755 | } | |
756 | ||
757 | status = lttng_live_recv(viewer_connection, &resp, sizeof(resp)); | |
758 | if (status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 759 | viewer_handle_recv_status(status, "create session reply"); |
4164020e SM |
760 | goto end; |
761 | } | |
762 | ||
763 | if (be32toh(resp.status) != LTTNG_VIEWER_CREATE_SESSION_OK) { | |
0f5c5d5c | 764 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Error creating viewer session"); |
4164020e SM |
765 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
766 | goto end; | |
767 | } | |
768 | ||
769 | status = lttng_live_query_session_ids(lttng_live_msg_iter); | |
770 | if (status == LTTNG_LIVE_VIEWER_STATUS_ERROR) { | |
0f5c5d5c SM |
771 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
772 | "Failed to query live viewer session ids"); | |
4164020e SM |
773 | goto end; |
774 | } else if (status == LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED) { | |
775 | goto end; | |
776 | } | |
7cdc2bab | 777 | |
f79c2d7a | 778 | end: |
4164020e | 779 | return status; |
7cdc2bab MD |
780 | } |
781 | ||
4164020e SM |
782 | static enum lttng_live_viewer_status receive_streams(struct lttng_live_session *session, |
783 | uint32_t stream_count, | |
784 | bt_self_message_iterator *self_msg_iter) | |
7cdc2bab | 785 | { |
4164020e SM |
786 | uint32_t i; |
787 | struct lttng_live_msg_iter *lttng_live_msg_iter = session->lttng_live_msg_iter; | |
788 | enum lttng_live_viewer_status status; | |
d721bef8 | 789 | live_viewer_connection *viewer_connection = lttng_live_msg_iter->viewer_connection.get(); |
4164020e | 790 | |
0f5c5d5c | 791 | BT_CPPLOGI_SPEC(viewer_connection->logger, "Getting {} new streams", stream_count); |
4164020e SM |
792 | for (i = 0; i < stream_count; i++) { |
793 | struct lttng_viewer_stream stream; | |
794 | struct lttng_live_stream_iterator *live_stream; | |
795 | uint64_t stream_id; | |
796 | uint64_t ctf_trace_id; | |
797 | ||
798 | status = lttng_live_recv(viewer_connection, &stream, sizeof(stream)); | |
799 | if (status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 800 | viewer_handle_recv_status(status, "stream reply"); |
4164020e SM |
801 | goto end; |
802 | } | |
803 | stream.path_name[LTTNG_VIEWER_PATH_MAX - 1] = '\0'; | |
804 | stream.channel_name[LTTNG_VIEWER_NAME_MAX - 1] = '\0'; | |
805 | stream_id = be64toh(stream.id); | |
806 | ctf_trace_id = be64toh(stream.ctf_trace_id); | |
807 | ||
808 | if (stream.metadata_flag) { | |
0f5c5d5c SM |
809 | BT_CPPLOGI_SPEC(viewer_connection->logger, " metadata stream {} : {}/{}", stream_id, |
810 | stream.path_name, stream.channel_name); | |
44bd6303 | 811 | if (lttng_live_metadata_create_stream(session, ctf_trace_id, stream_id)) { |
0f5c5d5c SM |
812 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
813 | "Error creating metadata stream"); | |
4164020e SM |
814 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
815 | goto end; | |
816 | } | |
817 | session->lazy_stream_msg_init = true; | |
818 | } else { | |
0f5c5d5c SM |
819 | BT_CPPLOGI_SPEC(viewer_connection->logger, " stream {} : {}/{}", stream_id, |
820 | stream.path_name, stream.channel_name); | |
4164020e SM |
821 | live_stream = |
822 | lttng_live_stream_iterator_create(session, ctf_trace_id, stream_id, self_msg_iter); | |
823 | if (!live_stream) { | |
0f5c5d5c | 824 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Error creating stream"); |
4164020e SM |
825 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
826 | goto end; | |
827 | } | |
828 | } | |
829 | } | |
830 | status = LTTNG_LIVE_VIEWER_STATUS_OK; | |
7cdc2bab | 831 | |
f79c2d7a | 832 | end: |
4164020e | 833 | return status; |
7cdc2bab MD |
834 | } |
835 | ||
4164020e SM |
836 | enum lttng_live_viewer_status lttng_live_session_attach(struct lttng_live_session *session, |
837 | bt_self_message_iterator *self_msg_iter) | |
7cdc2bab | 838 | { |
4164020e SM |
839 | struct lttng_viewer_cmd cmd; |
840 | enum lttng_live_viewer_status status; | |
841 | struct lttng_viewer_attach_session_request rq; | |
842 | struct lttng_viewer_attach_session_response rp; | |
843 | struct lttng_live_msg_iter *lttng_live_msg_iter = session->lttng_live_msg_iter; | |
d721bef8 | 844 | live_viewer_connection *viewer_connection = lttng_live_msg_iter->viewer_connection.get(); |
4164020e SM |
845 | uint64_t session_id = session->id; |
846 | uint32_t streams_count; | |
847 | const size_t cmd_buf_len = sizeof(cmd) + sizeof(rq); | |
848 | char cmd_buf[cmd_buf_len]; | |
849 | ||
0f5c5d5c SM |
850 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
851 | "Attaching to session: cmd={}, session-id={}, seek={}", | |
852 | LTTNG_VIEWER_ATTACH_SESSION, session_id, LTTNG_VIEWER_SEEK_LAST); | |
4164020e SM |
853 | |
854 | cmd.cmd = htobe32(LTTNG_VIEWER_ATTACH_SESSION); | |
855 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); | |
856 | cmd.cmd_version = htobe32(0); | |
857 | ||
858 | memset(&rq, 0, sizeof(rq)); | |
859 | rq.session_id = htobe64(session_id); | |
860 | // TODO: add cmd line parameter to select seek beginning | |
861 | // rq.seek = htobe32(LTTNG_VIEWER_SEEK_BEGINNING); | |
862 | rq.seek = htobe32(LTTNG_VIEWER_SEEK_LAST); | |
863 | ||
864 | /* | |
865 | * Merge the cmd and connection request to prevent a write-write | |
866 | * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the | |
867 | * second write to be performed quickly in presence of Nagle's algorithm. | |
868 | */ | |
869 | memcpy(cmd_buf, &cmd, sizeof(cmd)); | |
870 | memcpy(cmd_buf + sizeof(cmd), &rq, sizeof(rq)); | |
871 | status = lttng_live_send(viewer_connection, &cmd_buf, cmd_buf_len); | |
872 | if (status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 873 | viewer_handle_send_status(status, "attach session command"); |
4164020e SM |
874 | goto end; |
875 | } | |
876 | ||
877 | status = lttng_live_recv(viewer_connection, &rp, sizeof(rp)); | |
878 | if (status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 879 | viewer_handle_recv_status(status, "attach session reply"); |
4164020e SM |
880 | goto end; |
881 | } | |
882 | ||
883 | streams_count = be32toh(rp.streams_count); | |
884 | switch (be32toh(rp.status)) { | |
885 | case LTTNG_VIEWER_ATTACH_OK: | |
886 | break; | |
887 | case LTTNG_VIEWER_ATTACH_UNK: | |
0f5c5d5c SM |
888 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Session id {} is unknown", |
889 | session_id); | |
4164020e SM |
890 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
891 | goto end; | |
892 | case LTTNG_VIEWER_ATTACH_ALREADY: | |
0f5c5d5c SM |
893 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
894 | "There is already a viewer attached to this session"); | |
4164020e SM |
895 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
896 | goto end; | |
897 | case LTTNG_VIEWER_ATTACH_NOT_LIVE: | |
0f5c5d5c | 898 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Not a live session"); |
4164020e SM |
899 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
900 | goto end; | |
901 | case LTTNG_VIEWER_ATTACH_SEEK_ERR: | |
0f5c5d5c | 902 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Wrong seek parameter"); |
4164020e SM |
903 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
904 | goto end; | |
905 | default: | |
0f5c5d5c SM |
906 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Unknown attach return code {}", |
907 | be32toh(rp.status)); | |
4164020e SM |
908 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
909 | goto end; | |
910 | } | |
911 | ||
912 | /* We receive the initial list of streams. */ | |
913 | status = receive_streams(session, streams_count, self_msg_iter); | |
914 | switch (status) { | |
915 | case LTTNG_LIVE_VIEWER_STATUS_OK: | |
916 | break; | |
917 | case LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED: | |
918 | goto end; | |
919 | case LTTNG_LIVE_VIEWER_STATUS_ERROR: | |
0f5c5d5c | 920 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Error receiving streams"); |
4164020e SM |
921 | goto end; |
922 | default: | |
923 | bt_common_abort(); | |
924 | } | |
925 | ||
926 | session->attached = true; | |
927 | session->new_streams_needed = false; | |
7cdc2bab | 928 | |
eee8e741 | 929 | end: |
4164020e | 930 | return status; |
7cdc2bab MD |
931 | } |
932 | ||
4164020e | 933 | enum lttng_live_viewer_status lttng_live_session_detach(struct lttng_live_session *session) |
7cdc2bab | 934 | { |
4164020e SM |
935 | struct lttng_viewer_cmd cmd; |
936 | enum lttng_live_viewer_status status; | |
937 | struct lttng_viewer_detach_session_request rq; | |
938 | struct lttng_viewer_detach_session_response rp; | |
939 | struct lttng_live_msg_iter *lttng_live_msg_iter = session->lttng_live_msg_iter; | |
d721bef8 | 940 | live_viewer_connection *viewer_connection = lttng_live_msg_iter->viewer_connection.get(); |
4164020e SM |
941 | uint64_t session_id = session->id; |
942 | const size_t cmd_buf_len = sizeof(cmd) + sizeof(rq); | |
943 | char cmd_buf[cmd_buf_len]; | |
944 | ||
945 | /* | |
946 | * The session might already be detached and the viewer socket might | |
947 | * already been closed. This happens when calling this function when | |
948 | * tearing down the graph after an error. | |
949 | */ | |
950 | if (!session->attached || viewer_connection->control_sock == BT_INVALID_SOCKET) { | |
951 | return LTTNG_LIVE_VIEWER_STATUS_OK; | |
952 | } | |
953 | ||
0f5c5d5c SM |
954 | BT_CPPLOGD_SPEC(viewer_connection->logger, "Detaching from session: cmd={}, session-id={}", |
955 | LTTNG_VIEWER_DETACH_SESSION, session_id); | |
4164020e SM |
956 | |
957 | cmd.cmd = htobe32(LTTNG_VIEWER_DETACH_SESSION); | |
958 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); | |
959 | cmd.cmd_version = htobe32(0); | |
960 | ||
961 | memset(&rq, 0, sizeof(rq)); | |
962 | rq.session_id = htobe64(session_id); | |
963 | ||
964 | /* | |
965 | * Merge the cmd and connection request to prevent a write-write | |
966 | * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the | |
967 | * second write to be performed quickly in presence of Nagle's algorithm. | |
968 | */ | |
969 | memcpy(cmd_buf, &cmd, sizeof(cmd)); | |
970 | memcpy(cmd_buf + sizeof(cmd), &rq, sizeof(rq)); | |
971 | status = lttng_live_send(viewer_connection, &cmd_buf, cmd_buf_len); | |
972 | if (status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 973 | viewer_handle_send_status(status, "detach session command"); |
4164020e SM |
974 | goto end; |
975 | } | |
976 | ||
977 | status = lttng_live_recv(viewer_connection, &rp, sizeof(rp)); | |
978 | if (status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 979 | viewer_handle_recv_status(status, "detach session reply"); |
4164020e SM |
980 | goto end; |
981 | } | |
982 | ||
983 | switch (be32toh(rp.status)) { | |
984 | case LTTNG_VIEWER_DETACH_SESSION_OK: | |
985 | break; | |
986 | case LTTNG_VIEWER_DETACH_SESSION_UNK: | |
0f5c5d5c | 987 | BT_CPPLOGW_SPEC(viewer_connection->logger, "Session id {} is unknown", session_id); |
4164020e SM |
988 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
989 | goto end; | |
990 | case LTTNG_VIEWER_DETACH_SESSION_ERR: | |
0f5c5d5c | 991 | BT_CPPLOGW_SPEC(viewer_connection->logger, "Error detaching session id {}", session_id); |
4164020e SM |
992 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
993 | goto end; | |
994 | default: | |
0f5c5d5c SM |
995 | BT_CPPLOGE_SPEC(viewer_connection->logger, "Unknown detach return code {}", |
996 | be32toh(rp.status)); | |
4164020e SM |
997 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
998 | goto end; | |
999 | } | |
1000 | ||
1001 | session->attached = false; | |
1002 | ||
1003 | status = LTTNG_LIVE_VIEWER_STATUS_OK; | |
7cdc2bab | 1004 | |
f79c2d7a | 1005 | end: |
4164020e | 1006 | return status; |
7cdc2bab MD |
1007 | } |
1008 | ||
4164020e | 1009 | enum lttng_live_get_one_metadata_status |
15fcc425 | 1010 | lttng_live_get_one_metadata_packet(struct lttng_live_trace *trace, std::vector<char>& buf) |
7cdc2bab | 1011 | { |
4164020e SM |
1012 | uint64_t len = 0; |
1013 | enum lttng_live_get_one_metadata_status status; | |
1014 | enum lttng_live_viewer_status viewer_status; | |
1015 | struct lttng_viewer_cmd cmd; | |
1016 | struct lttng_viewer_get_metadata rq; | |
1017 | struct lttng_viewer_metadata_packet rp; | |
76edb16f | 1018 | std::vector<char> data; |
4164020e SM |
1019 | struct lttng_live_session *session = trace->session; |
1020 | struct lttng_live_msg_iter *lttng_live_msg_iter = session->lttng_live_msg_iter; | |
e66be7c3 | 1021 | struct lttng_live_metadata *metadata = trace->metadata.get(); |
d721bef8 | 1022 | live_viewer_connection *viewer_connection = lttng_live_msg_iter->viewer_connection.get(); |
4164020e SM |
1023 | const size_t cmd_buf_len = sizeof(cmd) + sizeof(rq); |
1024 | char cmd_buf[cmd_buf_len]; | |
1025 | ||
0f5c5d5c SM |
1026 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
1027 | "Requesting new metadata for trace:" | |
1028 | "cmd={}, trace-id={}, metadata-stream-id={}", | |
1029 | LTTNG_VIEWER_GET_METADATA, trace->id, metadata->stream_id); | |
4164020e SM |
1030 | |
1031 | rq.stream_id = htobe64(metadata->stream_id); | |
1032 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_METADATA); | |
1033 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); | |
1034 | cmd.cmd_version = htobe32(0); | |
1035 | ||
1036 | /* | |
1037 | * Merge the cmd and connection request to prevent a write-write | |
1038 | * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the | |
1039 | * second write to be performed quickly in presence of Nagle's algorithm. | |
1040 | */ | |
1041 | memcpy(cmd_buf, &cmd, sizeof(cmd)); | |
1042 | memcpy(cmd_buf + sizeof(cmd), &rq, sizeof(rq)); | |
1043 | viewer_status = lttng_live_send(viewer_connection, &cmd_buf, cmd_buf_len); | |
1044 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 1045 | viewer_handle_send_status(viewer_status, "get metadata command"); |
4164020e SM |
1046 | status = (enum lttng_live_get_one_metadata_status) viewer_status; |
1047 | goto end; | |
1048 | } | |
1049 | ||
1050 | viewer_status = lttng_live_recv(viewer_connection, &rp, sizeof(rp)); | |
1051 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 1052 | viewer_handle_recv_status(viewer_status, "get metadata reply"); |
4164020e SM |
1053 | status = (enum lttng_live_get_one_metadata_status) viewer_status; |
1054 | goto end; | |
1055 | } | |
1056 | ||
1057 | switch (be32toh(rp.status)) { | |
1058 | case LTTNG_VIEWER_METADATA_OK: | |
0f5c5d5c | 1059 | BT_CPPLOGD_SPEC(viewer_connection->logger, "Received get_metadata response: ok"); |
4164020e SM |
1060 | break; |
1061 | case LTTNG_VIEWER_NO_NEW_METADATA: | |
0f5c5d5c | 1062 | BT_CPPLOGD_SPEC(viewer_connection->logger, "Received get_metadata response: no new"); |
4164020e SM |
1063 | status = LTTNG_LIVE_GET_ONE_METADATA_STATUS_END; |
1064 | goto end; | |
1065 | case LTTNG_VIEWER_METADATA_ERR: | |
1066 | /* | |
1067 | * The Relayd cannot find this stream id. Maybe its | |
1068 | * gone already. This can happen in short lived UST app | |
1069 | * in a per-pid session. | |
1070 | */ | |
0f5c5d5c | 1071 | BT_CPPLOGD_SPEC(viewer_connection->logger, "Received get_metadata response: error"); |
4164020e SM |
1072 | status = LTTNG_LIVE_GET_ONE_METADATA_STATUS_CLOSED; |
1073 | goto end; | |
1074 | default: | |
0f5c5d5c SM |
1075 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
1076 | "Received get_metadata response: unknown"); | |
4164020e SM |
1077 | status = LTTNG_LIVE_GET_ONE_METADATA_STATUS_ERROR; |
1078 | goto end; | |
1079 | } | |
1080 | ||
1081 | len = be64toh(rp.len); | |
c5ce3927 FD |
1082 | if (len == 0) { |
1083 | /* | |
1084 | * We received a `LTTNG_VIEWER_METADATA_OK` with a packet | |
1085 | * length of 0. This means we must try again. This scenario | |
1086 | * arises when a clear command is performed on an lttng session. | |
1087 | */ | |
0f5c5d5c SM |
1088 | BT_CPPLOGD_SPEC( |
1089 | viewer_connection->logger, | |
c5ce3927 FD |
1090 | "Expecting a metadata packet of size 0. Retry to get a packet from the relay."); |
1091 | goto empty_metadata_packet_retry; | |
1092 | } | |
1093 | ||
0f5c5d5c | 1094 | BT_CPPLOGD_SPEC(viewer_connection->logger, "Writing {} bytes to metadata", len); |
4164020e | 1095 | if (len <= 0) { |
0f5c5d5c | 1096 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Erroneous response length"); |
4164020e SM |
1097 | status = LTTNG_LIVE_GET_ONE_METADATA_STATUS_ERROR; |
1098 | goto end; | |
1099 | } | |
1100 | ||
76edb16f | 1101 | data.resize(len); |
4164020e | 1102 | |
76edb16f | 1103 | viewer_status = lttng_live_recv(viewer_connection, data.data(), len); |
4164020e | 1104 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { |
0f5c5d5c | 1105 | viewer_handle_recv_status(viewer_status, "get metadata packet"); |
4164020e SM |
1106 | status = (enum lttng_live_get_one_metadata_status) viewer_status; |
1107 | goto end; | |
1108 | } | |
1109 | ||
1110 | /* | |
1111 | * Write the metadata to the file handle. | |
1112 | */ | |
76edb16f | 1113 | buf.insert(buf.end(), data.begin(), data.end()); |
4164020e | 1114 | |
c5ce3927 | 1115 | empty_metadata_packet_retry: |
4164020e | 1116 | status = LTTNG_LIVE_GET_ONE_METADATA_STATUS_OK; |
c28512ab | 1117 | |
c28512ab | 1118 | end: |
4164020e | 1119 | return status; |
7cdc2bab MD |
1120 | } |
1121 | ||
1122 | /* | |
1123 | * Assign the fields from a lttng_viewer_index to a packet_index. | |
1124 | */ | |
4164020e SM |
1125 | static void lttng_index_to_packet_index(struct lttng_viewer_index *lindex, |
1126 | struct packet_index *pindex) | |
7cdc2bab | 1127 | { |
4164020e SM |
1128 | BT_ASSERT(lindex); |
1129 | BT_ASSERT(pindex); | |
1130 | ||
1131 | pindex->offset = be64toh(lindex->offset); | |
1132 | pindex->packet_size = be64toh(lindex->packet_size); | |
1133 | pindex->content_size = be64toh(lindex->content_size); | |
1134 | pindex->ts_cycles.timestamp_begin = be64toh(lindex->timestamp_begin); | |
1135 | pindex->ts_cycles.timestamp_end = be64toh(lindex->timestamp_end); | |
1136 | pindex->events_discarded = be64toh(lindex->events_discarded); | |
7cdc2bab MD |
1137 | } |
1138 | ||
4164020e | 1139 | static void lttng_live_need_new_streams(struct lttng_live_msg_iter *lttng_live_msg_iter) |
36e94ad6 | 1140 | { |
751aaa62 | 1141 | for (const auto& session : lttng_live_msg_iter->sessions) { |
0f5c5d5c SM |
1142 | BT_CPPLOGD_SPEC(lttng_live_msg_iter->logger, |
1143 | "Marking session as needing new streams: " | |
1144 | "session-id={}", | |
1145 | session->id); | |
4164020e SM |
1146 | session->new_streams_needed = true; |
1147 | } | |
36e94ad6 FD |
1148 | } |
1149 | ||
4164020e SM |
1150 | enum lttng_live_iterator_status |
1151 | lttng_live_get_next_index(struct lttng_live_msg_iter *lttng_live_msg_iter, | |
1152 | struct lttng_live_stream_iterator *stream, struct packet_index *index) | |
7cdc2bab | 1153 | { |
4164020e SM |
1154 | struct lttng_viewer_cmd cmd; |
1155 | struct lttng_viewer_get_next_index rq; | |
1156 | enum lttng_live_viewer_status viewer_status; | |
1157 | struct lttng_viewer_index rp; | |
1158 | enum lttng_live_iterator_status status; | |
d721bef8 | 1159 | live_viewer_connection *viewer_connection = lttng_live_msg_iter->viewer_connection.get(); |
4164020e SM |
1160 | struct lttng_live_trace *trace = stream->trace; |
1161 | const size_t cmd_buf_len = sizeof(cmd) + sizeof(rq); | |
1162 | char cmd_buf[cmd_buf_len]; | |
1163 | uint32_t flags, rp_status; | |
1164 | ||
0f5c5d5c SM |
1165 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
1166 | "Requesting next index for stream: cmd={}, " | |
1167 | "viewer-stream-id={}", | |
1168 | LTTNG_VIEWER_GET_NEXT_INDEX, stream->viewer_stream_id); | |
4164020e SM |
1169 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_NEXT_INDEX); |
1170 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); | |
1171 | cmd.cmd_version = htobe32(0); | |
1172 | ||
1173 | memset(&rq, 0, sizeof(rq)); | |
1174 | rq.stream_id = htobe64(stream->viewer_stream_id); | |
1175 | ||
1176 | /* | |
1177 | * Merge the cmd and connection request to prevent a write-write | |
1178 | * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the | |
1179 | * second write to be performed quickly in presence of Nagle's algorithm. | |
1180 | */ | |
1181 | memcpy(cmd_buf, &cmd, sizeof(cmd)); | |
1182 | memcpy(cmd_buf + sizeof(cmd), &rq, sizeof(rq)); | |
1183 | ||
1184 | viewer_status = lttng_live_send(viewer_connection, &cmd_buf, cmd_buf_len); | |
1185 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 1186 | viewer_handle_send_status(viewer_status, "get next index command"); |
4164020e SM |
1187 | goto error; |
1188 | } | |
1189 | ||
1190 | viewer_status = lttng_live_recv(viewer_connection, &rp, sizeof(rp)); | |
1191 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 1192 | viewer_handle_recv_status(viewer_status, "get next index reply"); |
4164020e SM |
1193 | goto error; |
1194 | } | |
1195 | ||
1196 | flags = be32toh(rp.flags); | |
1197 | rp_status = be32toh(rp.status); | |
1198 | ||
0f5c5d5c SM |
1199 | BT_CPPLOGD_SPEC( |
1200 | viewer_connection->logger, "Received response from relay daemon: cmd=%s, response={}", | |
1201 | LTTNG_VIEWER_GET_NEXT_INDEX, static_cast<lttng_viewer_next_index_return_code>(rp_status)); | |
ca622546 JG |
1202 | |
1203 | if (flags & LTTNG_VIEWER_FLAG_NEW_STREAM) { | |
0f5c5d5c SM |
1204 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
1205 | "Marking all sessions as possibly needing new streams: " | |
1206 | "response={}, response-flag=NEW_STREAM", | |
1207 | static_cast<lttng_viewer_next_index_return_code>(rp_status)); | |
ca622546 JG |
1208 | lttng_live_need_new_streams(lttng_live_msg_iter); |
1209 | } | |
1210 | ||
4164020e SM |
1211 | switch (rp_status) { |
1212 | case LTTNG_VIEWER_INDEX_INACTIVE: | |
1213 | { | |
1214 | uint64_t ctf_stream_class_id; | |
1215 | ||
1216 | memset(index, 0, sizeof(struct packet_index)); | |
1217 | index->ts_cycles.timestamp_end = be64toh(rp.timestamp_end); | |
1218 | stream->current_inactivity_ts = index->ts_cycles.timestamp_end; | |
1219 | ctf_stream_class_id = be64toh(rp.stream_id); | |
1220 | if (stream->ctf_stream_class_id.is_set) { | |
1221 | BT_ASSERT(stream->ctf_stream_class_id.value == ctf_stream_class_id); | |
1222 | } else { | |
1223 | stream->ctf_stream_class_id.value = ctf_stream_class_id; | |
1224 | stream->ctf_stream_class_id.is_set = true; | |
1225 | } | |
1226 | lttng_live_stream_iterator_set_state(stream, LTTNG_LIVE_STREAM_QUIESCENT); | |
1227 | status = LTTNG_LIVE_ITERATOR_STATUS_OK; | |
1228 | break; | |
1229 | } | |
1230 | case LTTNG_VIEWER_INDEX_OK: | |
1231 | { | |
1232 | uint64_t ctf_stream_class_id; | |
1233 | ||
1234 | lttng_index_to_packet_index(&rp, index); | |
1235 | ctf_stream_class_id = be64toh(rp.stream_id); | |
1236 | if (stream->ctf_stream_class_id.is_set) { | |
1237 | BT_ASSERT(stream->ctf_stream_class_id.value == ctf_stream_class_id); | |
1238 | } else { | |
1239 | stream->ctf_stream_class_id.value = ctf_stream_class_id; | |
1240 | stream->ctf_stream_class_id.is_set = true; | |
1241 | } | |
4164020e SM |
1242 | lttng_live_stream_iterator_set_state(stream, LTTNG_LIVE_STREAM_ACTIVE_DATA); |
1243 | ||
1244 | if (flags & LTTNG_VIEWER_FLAG_NEW_METADATA) { | |
0f5c5d5c SM |
1245 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
1246 | "Marking trace as needing new metadata: " | |
1247 | "response={}, response-flag=NEW_METADATA, trace-id={}", | |
1248 | static_cast<lttng_viewer_next_index_return_code>(rp_status), trace->id); | |
4164020e SM |
1249 | trace->metadata_stream_state = LTTNG_LIVE_METADATA_STREAM_STATE_NEEDED; |
1250 | } | |
4164020e SM |
1251 | status = LTTNG_LIVE_ITERATOR_STATUS_OK; |
1252 | break; | |
1253 | } | |
1254 | case LTTNG_VIEWER_INDEX_RETRY: | |
1255 | memset(index, 0, sizeof(struct packet_index)); | |
1256 | lttng_live_stream_iterator_set_state(stream, LTTNG_LIVE_STREAM_ACTIVE_NO_DATA); | |
1257 | status = LTTNG_LIVE_ITERATOR_STATUS_AGAIN; | |
1258 | goto end; | |
1259 | case LTTNG_VIEWER_INDEX_HUP: | |
1260 | memset(index, 0, sizeof(struct packet_index)); | |
1261 | index->offset = EOF; | |
1262 | lttng_live_stream_iterator_set_state(stream, LTTNG_LIVE_STREAM_EOF); | |
1263 | stream->has_stream_hung_up = true; | |
1264 | status = LTTNG_LIVE_ITERATOR_STATUS_END; | |
1265 | break; | |
1266 | case LTTNG_VIEWER_INDEX_ERR: | |
1267 | memset(index, 0, sizeof(struct packet_index)); | |
1268 | lttng_live_stream_iterator_set_state(stream, LTTNG_LIVE_STREAM_ACTIVE_NO_DATA); | |
1269 | status = LTTNG_LIVE_ITERATOR_STATUS_ERROR; | |
1270 | goto end; | |
1271 | default: | |
0f5c5d5c SM |
1272 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
1273 | "Received get_next_index response: unknown value"); | |
4164020e SM |
1274 | memset(index, 0, sizeof(struct packet_index)); |
1275 | lttng_live_stream_iterator_set_state(stream, LTTNG_LIVE_STREAM_ACTIVE_NO_DATA); | |
1276 | status = LTTNG_LIVE_ITERATOR_STATUS_ERROR; | |
1277 | goto end; | |
1278 | } | |
ca622546 | 1279 | |
4164020e | 1280 | goto end; |
7cdc2bab MD |
1281 | |
1282 | error: | |
4164020e | 1283 | status = viewer_status_to_live_iterator_status(viewer_status); |
f79c2d7a | 1284 | end: |
4164020e | 1285 | return status; |
7cdc2bab MD |
1286 | } |
1287 | ||
4164020e SM |
1288 | enum ctf_msg_iter_medium_status |
1289 | lttng_live_get_stream_bytes(struct lttng_live_msg_iter *lttng_live_msg_iter, | |
1290 | struct lttng_live_stream_iterator *stream, uint8_t *buf, | |
1291 | uint64_t offset, uint64_t req_len, uint64_t *recv_len) | |
7cdc2bab | 1292 | { |
4164020e SM |
1293 | enum ctf_msg_iter_medium_status status; |
1294 | enum lttng_live_viewer_status viewer_status; | |
1295 | struct lttng_viewer_trace_packet rp; | |
1296 | struct lttng_viewer_cmd cmd; | |
1297 | struct lttng_viewer_get_packet rq; | |
d721bef8 | 1298 | live_viewer_connection *viewer_connection = lttng_live_msg_iter->viewer_connection.get(); |
4164020e SM |
1299 | struct lttng_live_trace *trace = stream->trace; |
1300 | const size_t cmd_buf_len = sizeof(cmd) + sizeof(rq); | |
1301 | char cmd_buf[cmd_buf_len]; | |
1302 | uint32_t flags, rp_status; | |
1303 | ||
0f5c5d5c SM |
1304 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
1305 | "Requesting data from stream: cmd={}, " | |
1306 | "offset={}, request-len={}", | |
1307 | LTTNG_VIEWER_GET_PACKET, offset, req_len); | |
4164020e SM |
1308 | |
1309 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_PACKET); | |
1310 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); | |
1311 | cmd.cmd_version = htobe32(0); | |
1312 | ||
1313 | memset(&rq, 0, sizeof(rq)); | |
1314 | rq.stream_id = htobe64(stream->viewer_stream_id); | |
1315 | rq.offset = htobe64(offset); | |
1316 | rq.len = htobe32(req_len); | |
1317 | ||
1318 | /* | |
1319 | * Merge the cmd and connection request to prevent a write-write | |
1320 | * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the | |
1321 | * second write to be performed quickly in presence of Nagle's algorithm. | |
1322 | */ | |
1323 | memcpy(cmd_buf, &cmd, sizeof(cmd)); | |
1324 | memcpy(cmd_buf + sizeof(cmd), &rq, sizeof(rq)); | |
1325 | ||
1326 | viewer_status = lttng_live_send(viewer_connection, &cmd_buf, cmd_buf_len); | |
1327 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 1328 | viewer_handle_send_status(viewer_status, "get data packet command"); |
4164020e SM |
1329 | goto error_convert_status; |
1330 | } | |
1331 | ||
1332 | viewer_status = lttng_live_recv(viewer_connection, &rp, sizeof(rp)); | |
1333 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 1334 | viewer_handle_recv_status(viewer_status, "get data packet reply"); |
4164020e SM |
1335 | goto error_convert_status; |
1336 | } | |
1337 | ||
1338 | flags = be32toh(rp.flags); | |
1339 | rp_status = be32toh(rp.status); | |
1340 | ||
0f5c5d5c SM |
1341 | BT_CPPLOGD_SPEC( |
1342 | viewer_connection->logger, "Received response from relay daemon: cmd={}, response={}", | |
1343 | LTTNG_VIEWER_GET_PACKET, static_cast<lttng_viewer_get_packet_return_code>(rp_status)); | |
4164020e SM |
1344 | switch (rp_status) { |
1345 | case LTTNG_VIEWER_GET_PACKET_OK: | |
1346 | req_len = be32toh(rp.len); | |
0f5c5d5c SM |
1347 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
1348 | "Got packet from relay daemon: response={}, packet-len={}", | |
1349 | static_cast<lttng_viewer_get_packet_return_code>(rp_status), req_len); | |
4164020e SM |
1350 | break; |
1351 | case LTTNG_VIEWER_GET_PACKET_RETRY: | |
1352 | /* Unimplemented by relay daemon */ | |
1353 | status = CTF_MSG_ITER_MEDIUM_STATUS_AGAIN; | |
1354 | goto end; | |
1355 | case LTTNG_VIEWER_GET_PACKET_ERR: | |
1356 | if (flags & LTTNG_VIEWER_FLAG_NEW_METADATA) { | |
0f5c5d5c SM |
1357 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
1358 | "Marking trace as needing new metadata: " | |
1359 | "response={}, response-flag=NEW_METADATA, trace-id={}", | |
1360 | static_cast<lttng_viewer_get_packet_return_code>(rp_status), trace->id); | |
4164020e SM |
1361 | trace->metadata_stream_state = LTTNG_LIVE_METADATA_STREAM_STATE_NEEDED; |
1362 | } | |
1363 | if (flags & LTTNG_VIEWER_FLAG_NEW_STREAM) { | |
0f5c5d5c SM |
1364 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
1365 | "Marking all sessions as possibly needing new streams: " | |
1366 | "response={}, response-flag=NEW_STREAM", | |
1367 | static_cast<lttng_viewer_get_packet_return_code>(rp_status)); | |
4164020e SM |
1368 | lttng_live_need_new_streams(lttng_live_msg_iter); |
1369 | } | |
1370 | if (flags & (LTTNG_VIEWER_FLAG_NEW_METADATA | LTTNG_VIEWER_FLAG_NEW_STREAM)) { | |
1371 | status = CTF_MSG_ITER_MEDIUM_STATUS_AGAIN; | |
0f5c5d5c SM |
1372 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
1373 | "Reply with any one flags set means we should retry: response={}", | |
1374 | static_cast<lttng_viewer_get_packet_return_code>(rp_status)); | |
4164020e SM |
1375 | goto end; |
1376 | } | |
0f5c5d5c SM |
1377 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
1378 | "Received get_data_packet response: error"); | |
4164020e SM |
1379 | status = CTF_MSG_ITER_MEDIUM_STATUS_ERROR; |
1380 | goto end; | |
1381 | case LTTNG_VIEWER_GET_PACKET_EOF: | |
1382 | status = CTF_MSG_ITER_MEDIUM_STATUS_EOF; | |
1383 | goto end; | |
1384 | default: | |
0f5c5d5c SM |
1385 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
1386 | "Received get_data_packet response: unknown ({})", rp_status); | |
4164020e SM |
1387 | status = CTF_MSG_ITER_MEDIUM_STATUS_ERROR; |
1388 | goto end; | |
1389 | } | |
1390 | ||
1391 | if (req_len == 0) { | |
1392 | status = CTF_MSG_ITER_MEDIUM_STATUS_ERROR; | |
1393 | goto end; | |
1394 | } | |
1395 | ||
1396 | viewer_status = lttng_live_recv(viewer_connection, buf, req_len); | |
1397 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 1398 | viewer_handle_recv_status(viewer_status, "get data packet"); |
4164020e SM |
1399 | goto error_convert_status; |
1400 | } | |
1401 | *recv_len = req_len; | |
1402 | ||
1403 | status = CTF_MSG_ITER_MEDIUM_STATUS_OK; | |
1404 | goto end; | |
f79c2d7a | 1405 | |
535fb48a | 1406 | error_convert_status: |
4164020e | 1407 | status = viewer_status_to_ctf_msg_iter_medium_status(viewer_status); |
f79c2d7a | 1408 | end: |
4164020e | 1409 | return status; |
7cdc2bab MD |
1410 | } |
1411 | ||
1412 | /* | |
1413 | * Request new streams for a session. | |
1414 | */ | |
4164020e SM |
1415 | enum lttng_live_iterator_status |
1416 | lttng_live_session_get_new_streams(struct lttng_live_session *session, | |
1417 | bt_self_message_iterator *self_msg_iter) | |
7cdc2bab | 1418 | { |
4164020e SM |
1419 | enum lttng_live_iterator_status status = LTTNG_LIVE_ITERATOR_STATUS_OK; |
1420 | struct lttng_viewer_cmd cmd; | |
1421 | struct lttng_viewer_new_streams_request rq; | |
1422 | struct lttng_viewer_new_streams_response rp; | |
1423 | struct lttng_live_msg_iter *lttng_live_msg_iter = session->lttng_live_msg_iter; | |
1424 | enum lttng_live_viewer_status viewer_status; | |
d721bef8 | 1425 | live_viewer_connection *viewer_connection = lttng_live_msg_iter->viewer_connection.get(); |
4164020e SM |
1426 | uint32_t streams_count; |
1427 | const size_t cmd_buf_len = sizeof(cmd) + sizeof(rq); | |
1428 | char cmd_buf[cmd_buf_len]; | |
1429 | ||
1430 | if (!session->new_streams_needed) { | |
1431 | status = LTTNG_LIVE_ITERATOR_STATUS_OK; | |
1432 | goto end; | |
1433 | } | |
1434 | ||
0f5c5d5c SM |
1435 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
1436 | "Requesting new streams for session: cmd={}, session-id={}", | |
1437 | LTTNG_VIEWER_GET_NEW_STREAMS, session->id); | |
4164020e SM |
1438 | |
1439 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_NEW_STREAMS); | |
1440 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); | |
1441 | cmd.cmd_version = htobe32(0); | |
1442 | ||
1443 | memset(&rq, 0, sizeof(rq)); | |
1444 | rq.session_id = htobe64(session->id); | |
1445 | ||
1446 | /* | |
1447 | * Merge the cmd and connection request to prevent a write-write | |
1448 | * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the | |
1449 | * second write to be performed quickly in presence of Nagle's algorithm. | |
1450 | */ | |
1451 | memcpy(cmd_buf, &cmd, sizeof(cmd)); | |
1452 | memcpy(cmd_buf + sizeof(cmd), &rq, sizeof(rq)); | |
1453 | ||
1454 | viewer_status = lttng_live_send(viewer_connection, &cmd_buf, cmd_buf_len); | |
1455 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 1456 | viewer_handle_send_status(viewer_status, "get new streams command"); |
4164020e SM |
1457 | status = viewer_status_to_live_iterator_status(viewer_status); |
1458 | goto end; | |
1459 | } | |
1460 | ||
1461 | viewer_status = lttng_live_recv(viewer_connection, &rp, sizeof(rp)); | |
1462 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 1463 | viewer_handle_recv_status(viewer_status, "get new streams reply"); |
4164020e SM |
1464 | status = viewer_status_to_live_iterator_status(viewer_status); |
1465 | goto end; | |
1466 | } | |
1467 | ||
1468 | streams_count = be32toh(rp.streams_count); | |
1469 | ||
1470 | switch (be32toh(rp.status)) { | |
1471 | case LTTNG_VIEWER_NEW_STREAMS_OK: | |
1472 | session->new_streams_needed = false; | |
1473 | break; | |
1474 | case LTTNG_VIEWER_NEW_STREAMS_NO_NEW: | |
1475 | session->new_streams_needed = false; | |
1476 | goto end; | |
1477 | case LTTNG_VIEWER_NEW_STREAMS_HUP: | |
1478 | session->new_streams_needed = false; | |
1479 | session->closed = true; | |
1480 | status = LTTNG_LIVE_ITERATOR_STATUS_END; | |
1481 | goto end; | |
1482 | case LTTNG_VIEWER_NEW_STREAMS_ERR: | |
0f5c5d5c | 1483 | BT_CPPLOGD_SPEC(viewer_connection->logger, "Received get_new_streams response: error"); |
4164020e SM |
1484 | status = LTTNG_LIVE_ITERATOR_STATUS_ERROR; |
1485 | goto end; | |
1486 | default: | |
0f5c5d5c SM |
1487 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
1488 | "Received get_new_streams response: Unknown:" | |
1489 | "return code {}", | |
1490 | be32toh(rp.status)); | |
4164020e SM |
1491 | status = LTTNG_LIVE_ITERATOR_STATUS_ERROR; |
1492 | goto end; | |
1493 | } | |
1494 | ||
1495 | viewer_status = receive_streams(session, streams_count, self_msg_iter); | |
1496 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 1497 | viewer_handle_recv_status(viewer_status, "new streams"); |
4164020e SM |
1498 | status = viewer_status_to_live_iterator_status(viewer_status); |
1499 | goto end; | |
1500 | } | |
1501 | ||
1502 | status = LTTNG_LIVE_ITERATOR_STATUS_OK; | |
f79c2d7a | 1503 | end: |
4164020e | 1504 | return status; |
7cdc2bab MD |
1505 | } |
1506 | ||
d721bef8 SM |
1507 | enum lttng_live_viewer_status |
1508 | live_viewer_connection_create(const char *url, bool in_query, | |
1509 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
1510 | const bt2c::Logger& parentLogger, live_viewer_connection::UP& viewer) | |
7cdc2bab | 1511 | { |
d721bef8 | 1512 | auto viewer_connection = bt2s::make_unique<live_viewer_connection>(parentLogger); |
4164020e | 1513 | |
0f5c5d5c SM |
1514 | if (bt_socket_init(viewer_connection->logger) != 0) { |
1515 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Failed to init socket"); | |
d721bef8 | 1516 | return LTTNG_LIVE_VIEWER_STATUS_ERROR; |
4164020e SM |
1517 | } |
1518 | ||
4164020e SM |
1519 | viewer_connection->control_sock = BT_INVALID_SOCKET; |
1520 | viewer_connection->port = -1; | |
1521 | viewer_connection->in_query = in_query; | |
1522 | viewer_connection->lttng_live_msg_iter = lttng_live_msg_iter; | |
30d81897 | 1523 | viewer_connection->url = url; |
4164020e | 1524 | |
0f5c5d5c | 1525 | BT_CPPLOGD_SPEC(viewer_connection->logger, "Establishing connection to url \"{}\"...", url); |
d721bef8 SM |
1526 | const auto status = lttng_live_connect_viewer(viewer_connection.get()); |
1527 | ||
4164020e SM |
1528 | /* |
1529 | * Only print error and append cause in case of error. not in case of | |
1530 | * interruption. | |
1531 | */ | |
1532 | if (status == LTTNG_LIVE_VIEWER_STATUS_ERROR) { | |
0f5c5d5c SM |
1533 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
1534 | "Failed to establish connection: " | |
1535 | "url=\"{}\"", | |
1536 | url); | |
d721bef8 | 1537 | return status; |
4164020e | 1538 | } else if (status == LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED) { |
d721bef8 | 1539 | return status; |
4164020e | 1540 | } |
0f5c5d5c | 1541 | BT_CPPLOGD_SPEC(viewer_connection->logger, "Connection to url \"{}\" is established", url); |
4164020e | 1542 | |
d721bef8 SM |
1543 | viewer = std::move(viewer_connection); |
1544 | return LTTNG_LIVE_VIEWER_STATUS_OK; | |
7cdc2bab MD |
1545 | } |
1546 | ||
277bcb7f | 1547 | live_viewer_connection::~live_viewer_connection() |
7cdc2bab | 1548 | { |
277bcb7f | 1549 | BT_CPPLOGD_SPEC(this->logger, "Closing connection to relay: relay-url=\"{}\"", this->url); |
b9e6ec43 | 1550 | |
277bcb7f | 1551 | lttng_live_disconnect_viewer(this); |
1cb3cdd7 | 1552 | |
4164020e | 1553 | bt_socket_fini(); |
7cdc2bab | 1554 | } |