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 | { |
e5694f0e SM |
82 | if (viewer_connection->control_sock == BT_INVALID_SOCKET) { |
83 | return; | |
84 | } | |
85 | ||
4164020e SM |
86 | int ret = bt_socket_close(viewer_connection->control_sock); |
87 | if (ret == -1) { | |
0f5c5d5c SM |
88 | BT_CPPLOGW_ERRNO_SPEC(viewer_connection->logger, |
89 | "Error closing viewer connection socket: ", "."); | |
4164020e SM |
90 | } |
91 | ||
92 | viewer_connection->control_sock = BT_INVALID_SOCKET; | |
b197ca37 FD |
93 | } |
94 | ||
f79c2d7a FD |
95 | /* |
96 | * This function receives a message from the Relay daemon. | |
97 | * If it received the entire message, it returns _OK, | |
98 | * If it's interrupted, it returns _INTERRUPTED, | |
99 | * otherwise, it returns _ERROR. | |
100 | */ | |
4164020e SM |
101 | static enum lttng_live_viewer_status |
102 | lttng_live_recv(struct live_viewer_connection *viewer_connection, void *buf, size_t len) | |
7cdc2bab | 103 | { |
4164020e | 104 | ssize_t received; |
4164020e SM |
105 | size_t total_received = 0, to_receive = len; |
106 | struct lttng_live_msg_iter *lttng_live_msg_iter = viewer_connection->lttng_live_msg_iter; | |
107 | enum lttng_live_viewer_status status; | |
108 | BT_SOCKET sock = viewer_connection->control_sock; | |
109 | ||
110 | /* | |
111 | * Receive a message from the Relay. | |
112 | */ | |
113 | do { | |
114 | received = bt_socket_recv(sock, (char *) buf + total_received, to_receive, 0); | |
115 | if (received == BT_SOCKET_ERROR) { | |
116 | if (bt_socket_interrupted()) { | |
117 | if (lttng_live_graph_is_canceled(lttng_live_msg_iter)) { | |
118 | /* | |
119 | * This interruption was due to a | |
120 | * SIGINT and the graph is being torn | |
121 | * down. | |
122 | */ | |
123 | status = LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED; | |
124 | lttng_live_msg_iter->was_interrupted = true; | |
125 | goto end; | |
126 | } else { | |
127 | /* | |
128 | * A signal was received, but the graph | |
129 | * is not being torn down. Carry on. | |
130 | */ | |
131 | continue; | |
132 | } | |
133 | } else { | |
134 | /* | |
135 | * For any other types of socket error, close | |
136 | * the socket and return an error. | |
137 | */ | |
0f5c5d5c | 138 | LTTNG_LIVE_CPPLOGE_APPEND_CAUSE_ERRNO("Error receiving from Relay", "."); |
4164020e SM |
139 | |
140 | viewer_connection_close_socket(viewer_connection); | |
141 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; | |
142 | goto end; | |
143 | } | |
144 | } else if (received == 0) { | |
145 | /* | |
146 | * The recv() call returned 0. This means the | |
147 | * connection was orderly shutdown from the other peer. | |
148 | * If that happens when we are trying to receive | |
149 | * a message from it, it means something when wrong. | |
150 | * Close the socket and return an error. | |
151 | */ | |
0f5c5d5c SM |
152 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
153 | "Remote side has closed connection"); | |
4164020e SM |
154 | viewer_connection_close_socket(viewer_connection); |
155 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; | |
156 | goto end; | |
157 | } | |
158 | ||
159 | BT_ASSERT(received <= to_receive); | |
160 | total_received += received; | |
161 | to_receive -= received; | |
162 | ||
163 | } while (to_receive > 0); | |
164 | ||
165 | BT_ASSERT(total_received == len); | |
166 | status = LTTNG_LIVE_VIEWER_STATUS_OK; | |
f79c2d7a FD |
167 | |
168 | end: | |
4164020e | 169 | return status; |
7cdc2bab MD |
170 | } |
171 | ||
f79c2d7a FD |
172 | /* |
173 | * This function sends a message to the Relay daemon. | |
174 | * If it send the message, it returns _OK, | |
175 | * If it's interrupted, it returns _INTERRUPTED, | |
176 | * otherwise, it returns _ERROR. | |
177 | */ | |
4164020e SM |
178 | static enum lttng_live_viewer_status |
179 | lttng_live_send(struct live_viewer_connection *viewer_connection, const void *buf, size_t len) | |
7cdc2bab | 180 | { |
4164020e | 181 | enum lttng_live_viewer_status status; |
4164020e SM |
182 | struct lttng_live_msg_iter *lttng_live_msg_iter = viewer_connection->lttng_live_msg_iter; |
183 | BT_SOCKET sock = viewer_connection->control_sock; | |
184 | size_t to_send = len; | |
185 | ssize_t total_sent = 0; | |
186 | ||
187 | do { | |
188 | ssize_t sent = bt_socket_send_nosigpipe(sock, (char *) buf + total_sent, to_send); | |
189 | if (sent == BT_SOCKET_ERROR) { | |
190 | if (bt_socket_interrupted()) { | |
191 | if (lttng_live_graph_is_canceled(lttng_live_msg_iter)) { | |
192 | /* | |
193 | * This interruption was a SIGINT and | |
194 | * the graph is being teared down. | |
195 | */ | |
196 | status = LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED; | |
197 | lttng_live_msg_iter->was_interrupted = true; | |
198 | goto end; | |
199 | } else { | |
200 | /* | |
201 | * A signal was received, but the graph | |
202 | * is not being teared down. Carry on. | |
203 | */ | |
204 | continue; | |
205 | } | |
206 | } else { | |
207 | /* | |
208 | * For any other types of socket error, close | |
209 | * the socket and return an error. | |
210 | */ | |
0f5c5d5c | 211 | LTTNG_LIVE_CPPLOGE_APPEND_CAUSE_ERRNO("Error sending to Relay", "."); |
4164020e SM |
212 | |
213 | viewer_connection_close_socket(viewer_connection); | |
214 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; | |
215 | goto end; | |
216 | } | |
217 | } | |
218 | ||
219 | BT_ASSERT(sent <= to_send); | |
220 | total_sent += sent; | |
221 | to_send -= sent; | |
222 | ||
223 | } while (to_send > 0); | |
224 | ||
225 | BT_ASSERT(total_sent == len); | |
226 | status = LTTNG_LIVE_VIEWER_STATUS_OK; | |
f79c2d7a FD |
227 | |
228 | end: | |
4164020e | 229 | return status; |
7cdc2bab MD |
230 | } |
231 | ||
4164020e | 232 | static int parse_url(struct live_viewer_connection *viewer_connection) |
7cdc2bab | 233 | { |
4164020e | 234 | char error_buf[256] = {0}; |
dd420a9b | 235 | struct bt_common_lttng_live_url_parts lttng_live_url_parts = {}; |
9d0b798a | 236 | bt_common_lttng_live_url_parts_deleter partsDeleter {lttng_live_url_parts}; |
4164020e | 237 | int ret = -1; |
4164020e | 238 | |
30d81897 | 239 | if (viewer_connection->url.empty()) { |
4164020e SM |
240 | goto end; |
241 | } | |
242 | ||
30d81897 SM |
243 | lttng_live_url_parts = bt_common_parse_lttng_live_url(viewer_connection->url.c_str(), error_buf, |
244 | sizeof(error_buf)); | |
4164020e | 245 | if (!lttng_live_url_parts.proto) { |
0f5c5d5c SM |
246 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Invalid LTTng live URL format: {}", |
247 | error_buf); | |
4164020e SM |
248 | goto end; |
249 | } | |
198e7911 | 250 | viewer_connection->proto.reset(lttng_live_url_parts.proto); |
4164020e SM |
251 | lttng_live_url_parts.proto = NULL; |
252 | ||
198e7911 | 253 | viewer_connection->relay_hostname.reset(lttng_live_url_parts.hostname); |
4164020e SM |
254 | lttng_live_url_parts.hostname = NULL; |
255 | ||
256 | if (lttng_live_url_parts.port >= 0) { | |
257 | viewer_connection->port = lttng_live_url_parts.port; | |
258 | } else { | |
259 | viewer_connection->port = LTTNG_DEFAULT_NETWORK_VIEWER_PORT; | |
260 | } | |
261 | ||
198e7911 | 262 | viewer_connection->target_hostname.reset(lttng_live_url_parts.target_hostname); |
4164020e SM |
263 | lttng_live_url_parts.target_hostname = NULL; |
264 | ||
265 | if (lttng_live_url_parts.session_name) { | |
198e7911 | 266 | viewer_connection->session_name.reset(lttng_live_url_parts.session_name); |
4164020e SM |
267 | lttng_live_url_parts.session_name = NULL; |
268 | } | |
269 | ||
270 | ret = 0; | |
7cdc2bab MD |
271 | |
272 | end: | |
4164020e | 273 | return ret; |
7cdc2bab MD |
274 | } |
275 | ||
4164020e SM |
276 | static enum lttng_live_viewer_status |
277 | lttng_live_handshake(struct live_viewer_connection *viewer_connection) | |
7cdc2bab | 278 | { |
4164020e SM |
279 | struct lttng_viewer_cmd cmd; |
280 | struct lttng_viewer_connect connect; | |
281 | enum lttng_live_viewer_status status; | |
4164020e SM |
282 | const size_t cmd_buf_len = sizeof(cmd) + sizeof(connect); |
283 | char cmd_buf[cmd_buf_len]; | |
284 | ||
0f5c5d5c SM |
285 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
286 | "Handshaking with the relay daemon: cmd={}, major-version={}, minor-version={}", | |
287 | LTTNG_VIEWER_CONNECT, LTTNG_LIVE_MAJOR, LTTNG_LIVE_MINOR); | |
4164020e SM |
288 | |
289 | cmd.cmd = htobe32(LTTNG_VIEWER_CONNECT); | |
290 | cmd.data_size = htobe64((uint64_t) sizeof(connect)); | |
291 | cmd.cmd_version = htobe32(0); | |
292 | ||
293 | connect.viewer_session_id = -1ULL; /* will be set on recv */ | |
294 | connect.major = htobe32(LTTNG_LIVE_MAJOR); | |
295 | connect.minor = htobe32(LTTNG_LIVE_MINOR); | |
296 | connect.type = htobe32(LTTNG_VIEWER_CLIENT_COMMAND); | |
297 | ||
298 | /* | |
299 | * Merge the cmd and connection request to prevent a write-write | |
300 | * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the | |
301 | * second write to be performed quickly in presence of Nagle's algorithm | |
302 | */ | |
303 | memcpy(cmd_buf, &cmd, sizeof(cmd)); | |
304 | memcpy(cmd_buf + sizeof(cmd), &connect, sizeof(connect)); | |
305 | ||
306 | status = lttng_live_send(viewer_connection, &cmd_buf, cmd_buf_len); | |
307 | if (status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 308 | viewer_handle_send_status(status, "viewer connect command"); |
4164020e SM |
309 | goto end; |
310 | } | |
311 | ||
312 | status = lttng_live_recv(viewer_connection, &connect, sizeof(connect)); | |
313 | if (status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 314 | viewer_handle_recv_status(status, "viewer connect reply"); |
4164020e SM |
315 | goto end; |
316 | } | |
317 | ||
0f5c5d5c SM |
318 | BT_CPPLOGI_SPEC(viewer_connection->logger, "Received viewer session ID : {}", |
319 | (uint64_t) be64toh(connect.viewer_session_id)); | |
320 | BT_CPPLOGI_SPEC(viewer_connection->logger, "Relayd version : {}.{}", be32toh(connect.major), | |
321 | be32toh(connect.minor)); | |
4164020e SM |
322 | |
323 | if (LTTNG_LIVE_MAJOR != be32toh(connect.major)) { | |
0f5c5d5c SM |
324 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
325 | "Incompatible lttng-relayd protocol"); | |
4164020e SM |
326 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
327 | goto end; | |
328 | } | |
329 | /* Use the smallest protocol version implemented. */ | |
330 | if (LTTNG_LIVE_MINOR > be32toh(connect.minor)) { | |
331 | viewer_connection->minor = be32toh(connect.minor); | |
332 | } else { | |
333 | viewer_connection->minor = LTTNG_LIVE_MINOR; | |
334 | } | |
335 | viewer_connection->major = LTTNG_LIVE_MAJOR; | |
336 | ||
337 | status = LTTNG_LIVE_VIEWER_STATUS_OK; | |
338 | ||
339 | goto end; | |
f79c2d7a FD |
340 | |
341 | end: | |
4164020e | 342 | return status; |
7cdc2bab MD |
343 | } |
344 | ||
4164020e SM |
345 | static enum lttng_live_viewer_status |
346 | lttng_live_connect_viewer(struct live_viewer_connection *viewer_connection) | |
7cdc2bab | 347 | { |
4164020e SM |
348 | struct hostent *host; |
349 | struct sockaddr_in server_addr; | |
350 | enum lttng_live_viewer_status status; | |
4164020e SM |
351 | |
352 | if (parse_url(viewer_connection)) { | |
0f5c5d5c | 353 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Failed to parse URL"); |
4164020e SM |
354 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
355 | goto error; | |
356 | } | |
357 | ||
0f5c5d5c SM |
358 | BT_CPPLOGD_SPEC( |
359 | viewer_connection->logger, | |
360 | "Connecting to hostname : {}, port : {}, target hostname : {}, session name : {}, proto : {}", | |
4164020e SM |
361 | viewer_connection->relay_hostname->str, viewer_connection->port, |
362 | !viewer_connection->target_hostname ? "<none>" : viewer_connection->target_hostname->str, | |
363 | !viewer_connection->session_name ? "<none>" : viewer_connection->session_name->str, | |
364 | viewer_connection->proto->str); | |
365 | ||
366 | host = gethostbyname(viewer_connection->relay_hostname->str); | |
367 | if (!host) { | |
0f5c5d5c SM |
368 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
369 | "Cannot lookup hostname: hostname=\"{}\"", | |
370 | viewer_connection->relay_hostname->str); | |
4164020e SM |
371 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
372 | goto error; | |
373 | } | |
374 | ||
375 | if ((viewer_connection->control_sock = socket(AF_INET, SOCK_STREAM, 0)) == BT_INVALID_SOCKET) { | |
0f5c5d5c SM |
376 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Socket creation failed: {}", |
377 | bt_socket_errormsg()); | |
4164020e SM |
378 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
379 | goto error; | |
380 | } | |
381 | ||
382 | server_addr.sin_family = AF_INET; | |
383 | server_addr.sin_port = htons(viewer_connection->port); | |
384 | server_addr.sin_addr = *((struct in_addr *) host->h_addr); | |
385 | memset(&(server_addr.sin_zero), 0, 8); | |
386 | ||
387 | if (connect(viewer_connection->control_sock, (struct sockaddr *) &server_addr, | |
388 | sizeof(struct sockaddr)) == BT_SOCKET_ERROR) { | |
0f5c5d5c SM |
389 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Connection failed: {}", |
390 | bt_socket_errormsg()); | |
4164020e SM |
391 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
392 | goto error; | |
393 | } | |
394 | ||
395 | status = lttng_live_handshake(viewer_connection); | |
396 | ||
397 | /* | |
398 | * Only print error and append cause in case of error. not in case of | |
399 | * interruption. | |
400 | */ | |
401 | if (status == LTTNG_LIVE_VIEWER_STATUS_ERROR) { | |
0f5c5d5c | 402 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Viewer handshake failed"); |
4164020e SM |
403 | goto error; |
404 | } else if (status == LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED) { | |
405 | goto end; | |
406 | } | |
407 | ||
408 | goto end; | |
7cdc2bab MD |
409 | |
410 | error: | |
e5694f0e SM |
411 | viewer_connection_close_socket(viewer_connection); |
412 | ||
f79c2d7a | 413 | end: |
4164020e | 414 | return status; |
7cdc2bab MD |
415 | } |
416 | ||
bf35aaef SM |
417 | static int list_update_session(const bt2::ArrayValue results, |
418 | const struct lttng_viewer_session *session, bool *_found, | |
419 | struct live_viewer_connection *viewer_connection) | |
7cdc2bab | 420 | { |
4164020e SM |
421 | bool found = false; |
422 | ||
bf35aaef SM |
423 | for (const auto value : results) { |
424 | const auto map = value.asMap(); | |
425 | const auto hostnameVal = map["target-hostname"]; | |
4164020e | 426 | |
bf35aaef | 427 | if (!hostnameVal) { |
0f5c5d5c SM |
428 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
429 | "Error borrowing \"target-hostname\" entry."); | |
bf35aaef | 430 | return -1; |
4164020e | 431 | } |
bf35aaef SM |
432 | |
433 | const auto sessionNameVal = map["session-name"]; | |
434 | ||
435 | if (!sessionNameVal) { | |
0f5c5d5c SM |
436 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
437 | "Error borrowing \"session-name\" entry."); | |
bf35aaef | 438 | return -1; |
4164020e | 439 | } |
bf35aaef SM |
440 | |
441 | const auto hostname_str = hostnameVal->asString().value(); | |
442 | const auto session_name_str = sessionNameVal->asString().value(); | |
4164020e SM |
443 | |
444 | if (strcmp(session->hostname, hostname_str) == 0 && | |
445 | strcmp(session->session_name, session_name_str) == 0) { | |
4164020e SM |
446 | uint32_t streams = be32toh(session->streams); |
447 | uint32_t clients = be32toh(session->clients); | |
448 | ||
449 | found = true; | |
450 | ||
bf35aaef SM |
451 | const auto streamCountVal = map["stream-count"]; |
452 | ||
453 | if (!streamCountVal) { | |
0f5c5d5c SM |
454 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
455 | "Error borrowing \"stream-count\" entry."); | |
bf35aaef | 456 | return -1; |
4164020e | 457 | } |
bf35aaef SM |
458 | |
459 | auto val = streamCountVal->asUnsignedInteger().value(); | |
460 | ||
4164020e SM |
461 | /* sum */ |
462 | val += streams; | |
bf35aaef | 463 | streamCountVal->asUnsignedInteger().value(val); |
4164020e | 464 | |
bf35aaef SM |
465 | const auto clientCountVal = map["client-count"]; |
466 | ||
467 | if (!clientCountVal) { | |
0f5c5d5c SM |
468 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
469 | "Error borrowing \"client-count\" entry."); | |
bf35aaef | 470 | return -1; |
4164020e | 471 | } |
bf35aaef SM |
472 | |
473 | val = clientCountVal->asUnsignedInteger().value(); | |
474 | ||
4164020e | 475 | /* max */ |
bf35aaef SM |
476 | val = std::max<uint64_t>(clients, val); |
477 | clientCountVal->asUnsignedInteger().value(val); | |
4164020e SM |
478 | } |
479 | ||
480 | if (found) { | |
481 | break; | |
482 | } | |
483 | } | |
bf35aaef | 484 | |
4164020e | 485 | *_found = found; |
bf35aaef | 486 | return 0; |
7cdc2bab MD |
487 | } |
488 | ||
bf35aaef | 489 | static int list_append_session(const bt2::ArrayValue results, const std::string& base_url, |
4164020e SM |
490 | const struct lttng_viewer_session *session, |
491 | struct live_viewer_connection *viewer_connection) | |
7cdc2bab | 492 | { |
4164020e | 493 | int ret = 0; |
4164020e SM |
494 | bool found = false; |
495 | ||
496 | /* | |
497 | * If the session already exists, add the stream count to it, | |
498 | * and do max of client counts. | |
499 | */ | |
500 | ret = list_update_session(results, session, &found, viewer_connection); | |
501 | if (ret || found) { | |
bf35aaef | 502 | return ret; |
4164020e SM |
503 | } |
504 | ||
bf35aaef | 505 | const auto map = bt2::MapValue::create(); |
4164020e | 506 | |
30d81897 | 507 | if (base_url.empty()) { |
bf35aaef SM |
508 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Error: base_url empty."); |
509 | return -1; | |
4164020e | 510 | } |
30d81897 | 511 | |
4164020e SM |
512 | /* |
513 | * key = "url", | |
514 | * value = <string>, | |
515 | */ | |
bf35aaef SM |
516 | map->insert("url", |
517 | fmt::format("{}/host/{}/{}", base_url, session->hostname, session->session_name)); | |
4164020e SM |
518 | |
519 | /* | |
520 | * key = "target-hostname", | |
521 | * value = <string>, | |
522 | */ | |
bf35aaef | 523 | map->insert("target-hostname", session->hostname); |
4164020e SM |
524 | |
525 | /* | |
526 | * key = "session-name", | |
527 | * value = <string>, | |
528 | */ | |
bf35aaef | 529 | map->insert("session-name", session->session_name); |
4164020e SM |
530 | |
531 | /* | |
532 | * key = "timer-us", | |
533 | * value = <integer>, | |
534 | */ | |
535 | { | |
536 | uint32_t live_timer = be32toh(session->live_timer); | |
537 | ||
bf35aaef | 538 | map->insert("timer-us", (uint64_t) live_timer); |
4164020e SM |
539 | } |
540 | ||
541 | /* | |
542 | * key = "stream-count", | |
543 | * value = <integer>, | |
544 | */ | |
545 | { | |
546 | uint32_t streams = be32toh(session->streams); | |
547 | ||
bf35aaef | 548 | map->insert("stream-count", (uint64_t) streams); |
4164020e SM |
549 | } |
550 | ||
551 | /* | |
552 | * key = "client-count", | |
553 | * value = <integer>, | |
554 | */ | |
555 | { | |
556 | uint32_t clients = be32toh(session->clients); | |
557 | ||
bf35aaef | 558 | map->insert("client-count", (uint64_t) clients); |
4164020e | 559 | } |
14f28187 | 560 | |
bf35aaef SM |
561 | results.append(*map); |
562 | return 0; | |
7cdc2bab MD |
563 | } |
564 | ||
565 | /* | |
566 | * Data structure returned: | |
567 | * | |
568 | * { | |
569 | * <array> = { | |
570 | * [n] = { | |
571 | * <map> = { | |
572 | * { | |
573 | * key = "url", | |
574 | * value = <string>, | |
575 | * }, | |
576 | * { | |
577 | * key = "target-hostname", | |
578 | * value = <string>, | |
579 | * }, | |
580 | * { | |
581 | * key = "session-name", | |
582 | * value = <string>, | |
583 | * }, | |
584 | * { | |
585 | * key = "timer-us", | |
586 | * value = <integer>, | |
587 | * }, | |
588 | * { | |
589 | * key = "stream-count", | |
590 | * value = <integer>, | |
591 | * }, | |
592 | * { | |
593 | * key = "client-count", | |
594 | * value = <integer>, | |
595 | * }, | |
596 | * }, | |
597 | * } | |
598 | * } | |
599 | */ | |
600 | ||
5ad6219b SM |
601 | bt2::Value::Shared |
602 | live_viewer_connection_list_sessions(struct live_viewer_connection *viewer_connection) | |
7cdc2bab | 603 | { |
4164020e SM |
604 | enum lttng_live_viewer_status viewer_status; |
605 | struct lttng_viewer_cmd cmd; | |
606 | struct lttng_viewer_list_sessions list; | |
607 | uint32_t i, sessions_count; | |
bf35aaef | 608 | auto result = bt2::ArrayValue::create(); |
4164020e | 609 | |
0f5c5d5c SM |
610 | BT_CPPLOGD_SPEC(viewer_connection->logger, "Requesting list of sessions: cmd={}", |
611 | LTTNG_VIEWER_LIST_SESSIONS); | |
4164020e SM |
612 | |
613 | cmd.cmd = htobe32(LTTNG_VIEWER_LIST_SESSIONS); | |
614 | cmd.data_size = htobe64((uint64_t) 0); | |
615 | cmd.cmd_version = htobe32(0); | |
616 | ||
617 | viewer_status = lttng_live_send(viewer_connection, &cmd, sizeof(cmd)); | |
618 | if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_ERROR) { | |
5ad6219b SM |
619 | BT_CPPLOGE_APPEND_CAUSE_AND_THROW_SPEC(viewer_connection->logger, bt2::Error, |
620 | "Error sending list sessions command"); | |
4164020e | 621 | } else if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED) { |
5ad6219b | 622 | throw bt2c::TryAgain {}; |
4164020e SM |
623 | } |
624 | ||
625 | viewer_status = lttng_live_recv(viewer_connection, &list, sizeof(list)); | |
626 | if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_ERROR) { | |
5ad6219b SM |
627 | BT_CPPLOGE_APPEND_CAUSE_AND_THROW_SPEC(viewer_connection->logger, bt2::Error, |
628 | "Error receiving session list"); | |
4164020e | 629 | } else if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED) { |
5ad6219b | 630 | throw bt2c::TryAgain {}; |
4164020e SM |
631 | } |
632 | ||
633 | sessions_count = be32toh(list.sessions_count); | |
634 | for (i = 0; i < sessions_count; i++) { | |
635 | struct lttng_viewer_session lsession; | |
636 | ||
637 | viewer_status = lttng_live_recv(viewer_connection, &lsession, sizeof(lsession)); | |
638 | if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_ERROR) { | |
5ad6219b SM |
639 | BT_CPPLOGE_APPEND_CAUSE_AND_THROW_SPEC(viewer_connection->logger, bt2::Error, |
640 | "Error receiving session:"); | |
4164020e | 641 | } else if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED) { |
5ad6219b | 642 | throw bt2c::TryAgain {}; |
4164020e SM |
643 | } |
644 | ||
645 | lsession.hostname[LTTNG_VIEWER_HOST_NAME_MAX - 1] = '\0'; | |
646 | lsession.session_name[LTTNG_VIEWER_NAME_MAX - 1] = '\0'; | |
bf35aaef | 647 | if (list_append_session(*result, viewer_connection->url, &lsession, viewer_connection)) { |
5ad6219b SM |
648 | BT_CPPLOGE_APPEND_CAUSE_AND_THROW_SPEC(viewer_connection->logger, bt2::Error, |
649 | "Error appending session"); | |
4164020e SM |
650 | } |
651 | } | |
652 | ||
5ad6219b | 653 | return result; |
7cdc2bab MD |
654 | } |
655 | ||
4164020e SM |
656 | static enum lttng_live_viewer_status |
657 | lttng_live_query_session_ids(struct lttng_live_msg_iter *lttng_live_msg_iter) | |
7cdc2bab | 658 | { |
4164020e SM |
659 | struct lttng_viewer_cmd cmd; |
660 | struct lttng_viewer_list_sessions list; | |
661 | struct lttng_viewer_session lsession; | |
662 | uint32_t i, sessions_count; | |
663 | uint64_t session_id; | |
664 | enum lttng_live_viewer_status status; | |
d721bef8 | 665 | live_viewer_connection *viewer_connection = lttng_live_msg_iter->viewer_connection.get(); |
4164020e | 666 | |
0f5c5d5c SM |
667 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
668 | "Asking the relay daemon for the list of sessions: cmd={}", | |
669 | LTTNG_VIEWER_LIST_SESSIONS); | |
4164020e SM |
670 | |
671 | cmd.cmd = htobe32(LTTNG_VIEWER_LIST_SESSIONS); | |
672 | cmd.data_size = htobe64((uint64_t) 0); | |
673 | cmd.cmd_version = htobe32(0); | |
674 | ||
675 | status = lttng_live_send(viewer_connection, &cmd, sizeof(cmd)); | |
676 | if (status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 677 | viewer_handle_send_status(status, "list sessions command"); |
4164020e SM |
678 | goto end; |
679 | } | |
680 | ||
681 | status = lttng_live_recv(viewer_connection, &list, sizeof(list)); | |
682 | if (status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 683 | viewer_handle_recv_status(status, "session list reply"); |
4164020e SM |
684 | goto end; |
685 | } | |
686 | ||
687 | sessions_count = be32toh(list.sessions_count); | |
688 | for (i = 0; i < sessions_count; i++) { | |
689 | status = lttng_live_recv(viewer_connection, &lsession, sizeof(lsession)); | |
690 | if (status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 691 | viewer_handle_recv_status(status, "session reply"); |
4164020e SM |
692 | goto end; |
693 | } | |
694 | lsession.hostname[LTTNG_VIEWER_HOST_NAME_MAX - 1] = '\0'; | |
695 | lsession.session_name[LTTNG_VIEWER_NAME_MAX - 1] = '\0'; | |
696 | session_id = be64toh(lsession.id); | |
697 | ||
0f5c5d5c SM |
698 | BT_CPPLOGI_SPEC(viewer_connection->logger, |
699 | "Adding session to internal list: " | |
700 | "session-id={}, hostname=\"{}\", session-name=\"{}\"", | |
701 | session_id, lsession.hostname, lsession.session_name); | |
4164020e SM |
702 | |
703 | if ((strncmp(lsession.session_name, viewer_connection->session_name->str, | |
704 | LTTNG_VIEWER_NAME_MAX) == 0) && | |
705 | (strncmp(lsession.hostname, viewer_connection->target_hostname->str, | |
706 | LTTNG_VIEWER_HOST_NAME_MAX) == 0)) { | |
707 | if (lttng_live_add_session(lttng_live_msg_iter, session_id, lsession.hostname, | |
708 | lsession.session_name)) { | |
0f5c5d5c SM |
709 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
710 | "Failed to add live session"); | |
4164020e SM |
711 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
712 | goto end; | |
713 | } | |
714 | } | |
715 | } | |
716 | ||
717 | status = LTTNG_LIVE_VIEWER_STATUS_OK; | |
7cdc2bab | 718 | |
f79c2d7a | 719 | end: |
4164020e | 720 | return status; |
7cdc2bab MD |
721 | } |
722 | ||
4164020e SM |
723 | enum lttng_live_viewer_status |
724 | lttng_live_create_viewer_session(struct lttng_live_msg_iter *lttng_live_msg_iter) | |
7cdc2bab | 725 | { |
4164020e SM |
726 | struct lttng_viewer_cmd cmd; |
727 | struct lttng_viewer_create_session_response resp; | |
728 | enum lttng_live_viewer_status status; | |
d721bef8 | 729 | live_viewer_connection *viewer_connection = lttng_live_msg_iter->viewer_connection.get(); |
4164020e | 730 | |
0f5c5d5c SM |
731 | BT_CPPLOGD_SPEC(viewer_connection->logger, "Creating a viewer session: cmd={}", |
732 | LTTNG_VIEWER_CREATE_SESSION); | |
4164020e SM |
733 | |
734 | cmd.cmd = htobe32(LTTNG_VIEWER_CREATE_SESSION); | |
735 | cmd.data_size = htobe64((uint64_t) 0); | |
736 | cmd.cmd_version = htobe32(0); | |
737 | ||
738 | status = lttng_live_send(viewer_connection, &cmd, sizeof(cmd)); | |
739 | if (status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 740 | viewer_handle_send_status(status, "create session command"); |
4164020e SM |
741 | goto end; |
742 | } | |
743 | ||
744 | status = lttng_live_recv(viewer_connection, &resp, sizeof(resp)); | |
745 | if (status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 746 | viewer_handle_recv_status(status, "create session reply"); |
4164020e SM |
747 | goto end; |
748 | } | |
749 | ||
750 | if (be32toh(resp.status) != LTTNG_VIEWER_CREATE_SESSION_OK) { | |
0f5c5d5c | 751 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Error creating viewer session"); |
4164020e SM |
752 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
753 | goto end; | |
754 | } | |
755 | ||
756 | status = lttng_live_query_session_ids(lttng_live_msg_iter); | |
757 | if (status == LTTNG_LIVE_VIEWER_STATUS_ERROR) { | |
0f5c5d5c SM |
758 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
759 | "Failed to query live viewer session ids"); | |
4164020e SM |
760 | goto end; |
761 | } else if (status == LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED) { | |
762 | goto end; | |
763 | } | |
7cdc2bab | 764 | |
f79c2d7a | 765 | end: |
4164020e | 766 | return status; |
7cdc2bab MD |
767 | } |
768 | ||
4164020e SM |
769 | static enum lttng_live_viewer_status receive_streams(struct lttng_live_session *session, |
770 | uint32_t stream_count, | |
771 | bt_self_message_iterator *self_msg_iter) | |
7cdc2bab | 772 | { |
4164020e SM |
773 | uint32_t i; |
774 | struct lttng_live_msg_iter *lttng_live_msg_iter = session->lttng_live_msg_iter; | |
775 | enum lttng_live_viewer_status status; | |
d721bef8 | 776 | live_viewer_connection *viewer_connection = lttng_live_msg_iter->viewer_connection.get(); |
4164020e | 777 | |
0f5c5d5c | 778 | BT_CPPLOGI_SPEC(viewer_connection->logger, "Getting {} new streams", stream_count); |
4164020e SM |
779 | for (i = 0; i < stream_count; i++) { |
780 | struct lttng_viewer_stream stream; | |
781 | struct lttng_live_stream_iterator *live_stream; | |
782 | uint64_t stream_id; | |
783 | uint64_t ctf_trace_id; | |
784 | ||
785 | status = lttng_live_recv(viewer_connection, &stream, sizeof(stream)); | |
786 | if (status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 787 | viewer_handle_recv_status(status, "stream reply"); |
4164020e SM |
788 | goto end; |
789 | } | |
790 | stream.path_name[LTTNG_VIEWER_PATH_MAX - 1] = '\0'; | |
791 | stream.channel_name[LTTNG_VIEWER_NAME_MAX - 1] = '\0'; | |
792 | stream_id = be64toh(stream.id); | |
793 | ctf_trace_id = be64toh(stream.ctf_trace_id); | |
794 | ||
795 | if (stream.metadata_flag) { | |
0f5c5d5c SM |
796 | BT_CPPLOGI_SPEC(viewer_connection->logger, " metadata stream {} : {}/{}", stream_id, |
797 | stream.path_name, stream.channel_name); | |
44bd6303 | 798 | if (lttng_live_metadata_create_stream(session, ctf_trace_id, stream_id)) { |
0f5c5d5c SM |
799 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
800 | "Error creating metadata stream"); | |
4164020e SM |
801 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
802 | goto end; | |
803 | } | |
804 | session->lazy_stream_msg_init = true; | |
805 | } else { | |
0f5c5d5c SM |
806 | BT_CPPLOGI_SPEC(viewer_connection->logger, " stream {} : {}/{}", stream_id, |
807 | stream.path_name, stream.channel_name); | |
4164020e SM |
808 | live_stream = |
809 | lttng_live_stream_iterator_create(session, ctf_trace_id, stream_id, self_msg_iter); | |
810 | if (!live_stream) { | |
0f5c5d5c | 811 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Error creating stream"); |
4164020e SM |
812 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
813 | goto end; | |
814 | } | |
815 | } | |
816 | } | |
817 | status = LTTNG_LIVE_VIEWER_STATUS_OK; | |
7cdc2bab | 818 | |
f79c2d7a | 819 | end: |
4164020e | 820 | return status; |
7cdc2bab MD |
821 | } |
822 | ||
4164020e SM |
823 | enum lttng_live_viewer_status lttng_live_session_attach(struct lttng_live_session *session, |
824 | bt_self_message_iterator *self_msg_iter) | |
7cdc2bab | 825 | { |
4164020e SM |
826 | struct lttng_viewer_cmd cmd; |
827 | enum lttng_live_viewer_status status; | |
828 | struct lttng_viewer_attach_session_request rq; | |
829 | struct lttng_viewer_attach_session_response rp; | |
830 | struct lttng_live_msg_iter *lttng_live_msg_iter = session->lttng_live_msg_iter; | |
d721bef8 | 831 | live_viewer_connection *viewer_connection = lttng_live_msg_iter->viewer_connection.get(); |
4164020e SM |
832 | uint64_t session_id = session->id; |
833 | uint32_t streams_count; | |
834 | const size_t cmd_buf_len = sizeof(cmd) + sizeof(rq); | |
835 | char cmd_buf[cmd_buf_len]; | |
836 | ||
0f5c5d5c SM |
837 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
838 | "Attaching to session: cmd={}, session-id={}, seek={}", | |
839 | LTTNG_VIEWER_ATTACH_SESSION, session_id, LTTNG_VIEWER_SEEK_LAST); | |
4164020e SM |
840 | |
841 | cmd.cmd = htobe32(LTTNG_VIEWER_ATTACH_SESSION); | |
842 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); | |
843 | cmd.cmd_version = htobe32(0); | |
844 | ||
845 | memset(&rq, 0, sizeof(rq)); | |
846 | rq.session_id = htobe64(session_id); | |
847 | // TODO: add cmd line parameter to select seek beginning | |
848 | // rq.seek = htobe32(LTTNG_VIEWER_SEEK_BEGINNING); | |
849 | rq.seek = htobe32(LTTNG_VIEWER_SEEK_LAST); | |
850 | ||
851 | /* | |
852 | * Merge the cmd and connection request to prevent a write-write | |
853 | * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the | |
854 | * second write to be performed quickly in presence of Nagle's algorithm. | |
855 | */ | |
856 | memcpy(cmd_buf, &cmd, sizeof(cmd)); | |
857 | memcpy(cmd_buf + sizeof(cmd), &rq, sizeof(rq)); | |
858 | status = lttng_live_send(viewer_connection, &cmd_buf, cmd_buf_len); | |
859 | if (status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 860 | viewer_handle_send_status(status, "attach session command"); |
4164020e SM |
861 | goto end; |
862 | } | |
863 | ||
864 | status = lttng_live_recv(viewer_connection, &rp, sizeof(rp)); | |
865 | if (status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 866 | viewer_handle_recv_status(status, "attach session reply"); |
4164020e SM |
867 | goto end; |
868 | } | |
869 | ||
870 | streams_count = be32toh(rp.streams_count); | |
871 | switch (be32toh(rp.status)) { | |
872 | case LTTNG_VIEWER_ATTACH_OK: | |
873 | break; | |
874 | case LTTNG_VIEWER_ATTACH_UNK: | |
0f5c5d5c SM |
875 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Session id {} is unknown", |
876 | session_id); | |
4164020e SM |
877 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
878 | goto end; | |
879 | case LTTNG_VIEWER_ATTACH_ALREADY: | |
0f5c5d5c SM |
880 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
881 | "There is already a viewer attached to this session"); | |
4164020e SM |
882 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
883 | goto end; | |
884 | case LTTNG_VIEWER_ATTACH_NOT_LIVE: | |
0f5c5d5c | 885 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Not a live session"); |
4164020e SM |
886 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
887 | goto end; | |
888 | case LTTNG_VIEWER_ATTACH_SEEK_ERR: | |
0f5c5d5c | 889 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Wrong seek parameter"); |
4164020e SM |
890 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
891 | goto end; | |
892 | default: | |
0f5c5d5c SM |
893 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Unknown attach return code {}", |
894 | be32toh(rp.status)); | |
4164020e SM |
895 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
896 | goto end; | |
897 | } | |
898 | ||
899 | /* We receive the initial list of streams. */ | |
900 | status = receive_streams(session, streams_count, self_msg_iter); | |
901 | switch (status) { | |
902 | case LTTNG_LIVE_VIEWER_STATUS_OK: | |
903 | break; | |
904 | case LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED: | |
905 | goto end; | |
906 | case LTTNG_LIVE_VIEWER_STATUS_ERROR: | |
0f5c5d5c | 907 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Error receiving streams"); |
4164020e SM |
908 | goto end; |
909 | default: | |
910 | bt_common_abort(); | |
911 | } | |
912 | ||
913 | session->attached = true; | |
914 | session->new_streams_needed = false; | |
7cdc2bab | 915 | |
eee8e741 | 916 | end: |
4164020e | 917 | return status; |
7cdc2bab MD |
918 | } |
919 | ||
4164020e | 920 | enum lttng_live_viewer_status lttng_live_session_detach(struct lttng_live_session *session) |
7cdc2bab | 921 | { |
4164020e SM |
922 | struct lttng_viewer_cmd cmd; |
923 | enum lttng_live_viewer_status status; | |
924 | struct lttng_viewer_detach_session_request rq; | |
925 | struct lttng_viewer_detach_session_response rp; | |
926 | struct lttng_live_msg_iter *lttng_live_msg_iter = session->lttng_live_msg_iter; | |
d721bef8 | 927 | live_viewer_connection *viewer_connection = lttng_live_msg_iter->viewer_connection.get(); |
4164020e SM |
928 | uint64_t session_id = session->id; |
929 | const size_t cmd_buf_len = sizeof(cmd) + sizeof(rq); | |
930 | char cmd_buf[cmd_buf_len]; | |
931 | ||
932 | /* | |
933 | * The session might already be detached and the viewer socket might | |
934 | * already been closed. This happens when calling this function when | |
935 | * tearing down the graph after an error. | |
936 | */ | |
937 | if (!session->attached || viewer_connection->control_sock == BT_INVALID_SOCKET) { | |
938 | return LTTNG_LIVE_VIEWER_STATUS_OK; | |
939 | } | |
940 | ||
0f5c5d5c SM |
941 | BT_CPPLOGD_SPEC(viewer_connection->logger, "Detaching from session: cmd={}, session-id={}", |
942 | LTTNG_VIEWER_DETACH_SESSION, session_id); | |
4164020e SM |
943 | |
944 | cmd.cmd = htobe32(LTTNG_VIEWER_DETACH_SESSION); | |
945 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); | |
946 | cmd.cmd_version = htobe32(0); | |
947 | ||
948 | memset(&rq, 0, sizeof(rq)); | |
949 | rq.session_id = htobe64(session_id); | |
950 | ||
951 | /* | |
952 | * Merge the cmd and connection request to prevent a write-write | |
953 | * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the | |
954 | * second write to be performed quickly in presence of Nagle's algorithm. | |
955 | */ | |
956 | memcpy(cmd_buf, &cmd, sizeof(cmd)); | |
957 | memcpy(cmd_buf + sizeof(cmd), &rq, sizeof(rq)); | |
958 | status = lttng_live_send(viewer_connection, &cmd_buf, cmd_buf_len); | |
959 | if (status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 960 | viewer_handle_send_status(status, "detach session command"); |
4164020e SM |
961 | goto end; |
962 | } | |
963 | ||
964 | status = lttng_live_recv(viewer_connection, &rp, sizeof(rp)); | |
965 | if (status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 966 | viewer_handle_recv_status(status, "detach session reply"); |
4164020e SM |
967 | goto end; |
968 | } | |
969 | ||
970 | switch (be32toh(rp.status)) { | |
971 | case LTTNG_VIEWER_DETACH_SESSION_OK: | |
972 | break; | |
973 | case LTTNG_VIEWER_DETACH_SESSION_UNK: | |
0f5c5d5c | 974 | BT_CPPLOGW_SPEC(viewer_connection->logger, "Session id {} is unknown", session_id); |
4164020e SM |
975 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
976 | goto end; | |
977 | case LTTNG_VIEWER_DETACH_SESSION_ERR: | |
0f5c5d5c | 978 | BT_CPPLOGW_SPEC(viewer_connection->logger, "Error detaching session id {}", session_id); |
4164020e SM |
979 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
980 | goto end; | |
981 | default: | |
0f5c5d5c SM |
982 | BT_CPPLOGE_SPEC(viewer_connection->logger, "Unknown detach return code {}", |
983 | be32toh(rp.status)); | |
4164020e SM |
984 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
985 | goto end; | |
986 | } | |
987 | ||
988 | session->attached = false; | |
989 | ||
990 | status = LTTNG_LIVE_VIEWER_STATUS_OK; | |
7cdc2bab | 991 | |
f79c2d7a | 992 | end: |
4164020e | 993 | return status; |
7cdc2bab MD |
994 | } |
995 | ||
4164020e | 996 | enum lttng_live_get_one_metadata_status |
15fcc425 | 997 | lttng_live_get_one_metadata_packet(struct lttng_live_trace *trace, std::vector<char>& buf) |
7cdc2bab | 998 | { |
4164020e SM |
999 | uint64_t len = 0; |
1000 | enum lttng_live_get_one_metadata_status status; | |
1001 | enum lttng_live_viewer_status viewer_status; | |
1002 | struct lttng_viewer_cmd cmd; | |
1003 | struct lttng_viewer_get_metadata rq; | |
1004 | struct lttng_viewer_metadata_packet rp; | |
76edb16f | 1005 | std::vector<char> data; |
4164020e SM |
1006 | struct lttng_live_session *session = trace->session; |
1007 | struct lttng_live_msg_iter *lttng_live_msg_iter = session->lttng_live_msg_iter; | |
e66be7c3 | 1008 | struct lttng_live_metadata *metadata = trace->metadata.get(); |
d721bef8 | 1009 | live_viewer_connection *viewer_connection = lttng_live_msg_iter->viewer_connection.get(); |
4164020e SM |
1010 | const size_t cmd_buf_len = sizeof(cmd) + sizeof(rq); |
1011 | char cmd_buf[cmd_buf_len]; | |
1012 | ||
0f5c5d5c SM |
1013 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
1014 | "Requesting new metadata for trace:" | |
1015 | "cmd={}, trace-id={}, metadata-stream-id={}", | |
1016 | LTTNG_VIEWER_GET_METADATA, trace->id, metadata->stream_id); | |
4164020e SM |
1017 | |
1018 | rq.stream_id = htobe64(metadata->stream_id); | |
1019 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_METADATA); | |
1020 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); | |
1021 | cmd.cmd_version = htobe32(0); | |
1022 | ||
1023 | /* | |
1024 | * Merge the cmd and connection request to prevent a write-write | |
1025 | * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the | |
1026 | * second write to be performed quickly in presence of Nagle's algorithm. | |
1027 | */ | |
1028 | memcpy(cmd_buf, &cmd, sizeof(cmd)); | |
1029 | memcpy(cmd_buf + sizeof(cmd), &rq, sizeof(rq)); | |
1030 | viewer_status = lttng_live_send(viewer_connection, &cmd_buf, cmd_buf_len); | |
1031 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 1032 | viewer_handle_send_status(viewer_status, "get metadata command"); |
4164020e SM |
1033 | status = (enum lttng_live_get_one_metadata_status) viewer_status; |
1034 | goto end; | |
1035 | } | |
1036 | ||
1037 | viewer_status = lttng_live_recv(viewer_connection, &rp, sizeof(rp)); | |
1038 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 1039 | viewer_handle_recv_status(viewer_status, "get metadata reply"); |
4164020e SM |
1040 | status = (enum lttng_live_get_one_metadata_status) viewer_status; |
1041 | goto end; | |
1042 | } | |
1043 | ||
1044 | switch (be32toh(rp.status)) { | |
1045 | case LTTNG_VIEWER_METADATA_OK: | |
0f5c5d5c | 1046 | BT_CPPLOGD_SPEC(viewer_connection->logger, "Received get_metadata response: ok"); |
4164020e SM |
1047 | break; |
1048 | case LTTNG_VIEWER_NO_NEW_METADATA: | |
0f5c5d5c | 1049 | BT_CPPLOGD_SPEC(viewer_connection->logger, "Received get_metadata response: no new"); |
4164020e SM |
1050 | status = LTTNG_LIVE_GET_ONE_METADATA_STATUS_END; |
1051 | goto end; | |
1052 | case LTTNG_VIEWER_METADATA_ERR: | |
1053 | /* | |
1054 | * The Relayd cannot find this stream id. Maybe its | |
1055 | * gone already. This can happen in short lived UST app | |
1056 | * in a per-pid session. | |
1057 | */ | |
0f5c5d5c | 1058 | BT_CPPLOGD_SPEC(viewer_connection->logger, "Received get_metadata response: error"); |
4164020e SM |
1059 | status = LTTNG_LIVE_GET_ONE_METADATA_STATUS_CLOSED; |
1060 | goto end; | |
1061 | default: | |
0f5c5d5c SM |
1062 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
1063 | "Received get_metadata response: unknown"); | |
4164020e SM |
1064 | status = LTTNG_LIVE_GET_ONE_METADATA_STATUS_ERROR; |
1065 | goto end; | |
1066 | } | |
1067 | ||
1068 | len = be64toh(rp.len); | |
c5ce3927 FD |
1069 | if (len == 0) { |
1070 | /* | |
1071 | * We received a `LTTNG_VIEWER_METADATA_OK` with a packet | |
1072 | * length of 0. This means we must try again. This scenario | |
1073 | * arises when a clear command is performed on an lttng session. | |
1074 | */ | |
0f5c5d5c SM |
1075 | BT_CPPLOGD_SPEC( |
1076 | viewer_connection->logger, | |
c5ce3927 FD |
1077 | "Expecting a metadata packet of size 0. Retry to get a packet from the relay."); |
1078 | goto empty_metadata_packet_retry; | |
1079 | } | |
1080 | ||
0f5c5d5c | 1081 | BT_CPPLOGD_SPEC(viewer_connection->logger, "Writing {} bytes to metadata", len); |
4164020e | 1082 | if (len <= 0) { |
0f5c5d5c | 1083 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Erroneous response length"); |
4164020e SM |
1084 | status = LTTNG_LIVE_GET_ONE_METADATA_STATUS_ERROR; |
1085 | goto end; | |
1086 | } | |
1087 | ||
76edb16f | 1088 | data.resize(len); |
4164020e | 1089 | |
76edb16f | 1090 | viewer_status = lttng_live_recv(viewer_connection, data.data(), len); |
4164020e | 1091 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { |
0f5c5d5c | 1092 | viewer_handle_recv_status(viewer_status, "get metadata packet"); |
4164020e SM |
1093 | status = (enum lttng_live_get_one_metadata_status) viewer_status; |
1094 | goto end; | |
1095 | } | |
1096 | ||
1097 | /* | |
1098 | * Write the metadata to the file handle. | |
1099 | */ | |
76edb16f | 1100 | buf.insert(buf.end(), data.begin(), data.end()); |
4164020e | 1101 | |
c5ce3927 | 1102 | empty_metadata_packet_retry: |
4164020e | 1103 | status = LTTNG_LIVE_GET_ONE_METADATA_STATUS_OK; |
c28512ab | 1104 | |
c28512ab | 1105 | end: |
4164020e | 1106 | return status; |
7cdc2bab MD |
1107 | } |
1108 | ||
1109 | /* | |
1110 | * Assign the fields from a lttng_viewer_index to a packet_index. | |
1111 | */ | |
4164020e SM |
1112 | static void lttng_index_to_packet_index(struct lttng_viewer_index *lindex, |
1113 | struct packet_index *pindex) | |
7cdc2bab | 1114 | { |
4164020e SM |
1115 | BT_ASSERT(lindex); |
1116 | BT_ASSERT(pindex); | |
1117 | ||
1118 | pindex->offset = be64toh(lindex->offset); | |
1119 | pindex->packet_size = be64toh(lindex->packet_size); | |
1120 | pindex->content_size = be64toh(lindex->content_size); | |
1121 | pindex->ts_cycles.timestamp_begin = be64toh(lindex->timestamp_begin); | |
1122 | pindex->ts_cycles.timestamp_end = be64toh(lindex->timestamp_end); | |
1123 | pindex->events_discarded = be64toh(lindex->events_discarded); | |
7cdc2bab MD |
1124 | } |
1125 | ||
4164020e | 1126 | static void lttng_live_need_new_streams(struct lttng_live_msg_iter *lttng_live_msg_iter) |
36e94ad6 | 1127 | { |
751aaa62 | 1128 | for (const auto& session : lttng_live_msg_iter->sessions) { |
0f5c5d5c SM |
1129 | BT_CPPLOGD_SPEC(lttng_live_msg_iter->logger, |
1130 | "Marking session as needing new streams: " | |
1131 | "session-id={}", | |
1132 | session->id); | |
4164020e SM |
1133 | session->new_streams_needed = true; |
1134 | } | |
36e94ad6 FD |
1135 | } |
1136 | ||
4164020e SM |
1137 | enum lttng_live_iterator_status |
1138 | lttng_live_get_next_index(struct lttng_live_msg_iter *lttng_live_msg_iter, | |
1139 | struct lttng_live_stream_iterator *stream, struct packet_index *index) | |
7cdc2bab | 1140 | { |
4164020e SM |
1141 | struct lttng_viewer_cmd cmd; |
1142 | struct lttng_viewer_get_next_index rq; | |
1143 | enum lttng_live_viewer_status viewer_status; | |
1144 | struct lttng_viewer_index rp; | |
1145 | enum lttng_live_iterator_status status; | |
d721bef8 | 1146 | live_viewer_connection *viewer_connection = lttng_live_msg_iter->viewer_connection.get(); |
4164020e SM |
1147 | struct lttng_live_trace *trace = stream->trace; |
1148 | const size_t cmd_buf_len = sizeof(cmd) + sizeof(rq); | |
1149 | char cmd_buf[cmd_buf_len]; | |
1150 | uint32_t flags, rp_status; | |
1151 | ||
0f5c5d5c SM |
1152 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
1153 | "Requesting next index for stream: cmd={}, " | |
1154 | "viewer-stream-id={}", | |
1155 | LTTNG_VIEWER_GET_NEXT_INDEX, stream->viewer_stream_id); | |
4164020e SM |
1156 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_NEXT_INDEX); |
1157 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); | |
1158 | cmd.cmd_version = htobe32(0); | |
1159 | ||
1160 | memset(&rq, 0, sizeof(rq)); | |
1161 | rq.stream_id = htobe64(stream->viewer_stream_id); | |
1162 | ||
1163 | /* | |
1164 | * Merge the cmd and connection request to prevent a write-write | |
1165 | * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the | |
1166 | * second write to be performed quickly in presence of Nagle's algorithm. | |
1167 | */ | |
1168 | memcpy(cmd_buf, &cmd, sizeof(cmd)); | |
1169 | memcpy(cmd_buf + sizeof(cmd), &rq, sizeof(rq)); | |
1170 | ||
1171 | viewer_status = lttng_live_send(viewer_connection, &cmd_buf, cmd_buf_len); | |
1172 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 1173 | viewer_handle_send_status(viewer_status, "get next index command"); |
4164020e SM |
1174 | goto error; |
1175 | } | |
1176 | ||
1177 | viewer_status = lttng_live_recv(viewer_connection, &rp, sizeof(rp)); | |
1178 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 1179 | viewer_handle_recv_status(viewer_status, "get next index reply"); |
4164020e SM |
1180 | goto error; |
1181 | } | |
1182 | ||
1183 | flags = be32toh(rp.flags); | |
1184 | rp_status = be32toh(rp.status); | |
1185 | ||
0f5c5d5c SM |
1186 | BT_CPPLOGD_SPEC( |
1187 | viewer_connection->logger, "Received response from relay daemon: cmd=%s, response={}", | |
1188 | LTTNG_VIEWER_GET_NEXT_INDEX, static_cast<lttng_viewer_next_index_return_code>(rp_status)); | |
ca622546 JG |
1189 | |
1190 | if (flags & LTTNG_VIEWER_FLAG_NEW_STREAM) { | |
0f5c5d5c SM |
1191 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
1192 | "Marking all sessions as possibly needing new streams: " | |
1193 | "response={}, response-flag=NEW_STREAM", | |
1194 | static_cast<lttng_viewer_next_index_return_code>(rp_status)); | |
ca622546 JG |
1195 | lttng_live_need_new_streams(lttng_live_msg_iter); |
1196 | } | |
1197 | ||
4164020e SM |
1198 | switch (rp_status) { |
1199 | case LTTNG_VIEWER_INDEX_INACTIVE: | |
1200 | { | |
1201 | uint64_t ctf_stream_class_id; | |
1202 | ||
1203 | memset(index, 0, sizeof(struct packet_index)); | |
1204 | index->ts_cycles.timestamp_end = be64toh(rp.timestamp_end); | |
1205 | stream->current_inactivity_ts = index->ts_cycles.timestamp_end; | |
1206 | ctf_stream_class_id = be64toh(rp.stream_id); | |
1207 | if (stream->ctf_stream_class_id.is_set) { | |
1208 | BT_ASSERT(stream->ctf_stream_class_id.value == ctf_stream_class_id); | |
1209 | } else { | |
1210 | stream->ctf_stream_class_id.value = ctf_stream_class_id; | |
1211 | stream->ctf_stream_class_id.is_set = true; | |
1212 | } | |
1213 | lttng_live_stream_iterator_set_state(stream, LTTNG_LIVE_STREAM_QUIESCENT); | |
1214 | status = LTTNG_LIVE_ITERATOR_STATUS_OK; | |
1215 | break; | |
1216 | } | |
1217 | case LTTNG_VIEWER_INDEX_OK: | |
1218 | { | |
1219 | uint64_t ctf_stream_class_id; | |
1220 | ||
1221 | lttng_index_to_packet_index(&rp, index); | |
1222 | ctf_stream_class_id = be64toh(rp.stream_id); | |
1223 | if (stream->ctf_stream_class_id.is_set) { | |
1224 | BT_ASSERT(stream->ctf_stream_class_id.value == ctf_stream_class_id); | |
1225 | } else { | |
1226 | stream->ctf_stream_class_id.value = ctf_stream_class_id; | |
1227 | stream->ctf_stream_class_id.is_set = true; | |
1228 | } | |
4164020e SM |
1229 | lttng_live_stream_iterator_set_state(stream, LTTNG_LIVE_STREAM_ACTIVE_DATA); |
1230 | ||
1231 | if (flags & LTTNG_VIEWER_FLAG_NEW_METADATA) { | |
0f5c5d5c SM |
1232 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
1233 | "Marking trace as needing new metadata: " | |
1234 | "response={}, response-flag=NEW_METADATA, trace-id={}", | |
1235 | static_cast<lttng_viewer_next_index_return_code>(rp_status), trace->id); | |
4164020e SM |
1236 | trace->metadata_stream_state = LTTNG_LIVE_METADATA_STREAM_STATE_NEEDED; |
1237 | } | |
4164020e SM |
1238 | status = LTTNG_LIVE_ITERATOR_STATUS_OK; |
1239 | break; | |
1240 | } | |
1241 | case LTTNG_VIEWER_INDEX_RETRY: | |
1242 | memset(index, 0, sizeof(struct packet_index)); | |
1243 | lttng_live_stream_iterator_set_state(stream, LTTNG_LIVE_STREAM_ACTIVE_NO_DATA); | |
1244 | status = LTTNG_LIVE_ITERATOR_STATUS_AGAIN; | |
1245 | goto end; | |
1246 | case LTTNG_VIEWER_INDEX_HUP: | |
1247 | memset(index, 0, sizeof(struct packet_index)); | |
1248 | index->offset = EOF; | |
1249 | lttng_live_stream_iterator_set_state(stream, LTTNG_LIVE_STREAM_EOF); | |
1250 | stream->has_stream_hung_up = true; | |
1251 | status = LTTNG_LIVE_ITERATOR_STATUS_END; | |
1252 | break; | |
1253 | case LTTNG_VIEWER_INDEX_ERR: | |
1254 | memset(index, 0, sizeof(struct packet_index)); | |
1255 | lttng_live_stream_iterator_set_state(stream, LTTNG_LIVE_STREAM_ACTIVE_NO_DATA); | |
1256 | status = LTTNG_LIVE_ITERATOR_STATUS_ERROR; | |
1257 | goto end; | |
1258 | default: | |
0f5c5d5c SM |
1259 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
1260 | "Received get_next_index response: unknown value"); | |
4164020e SM |
1261 | memset(index, 0, sizeof(struct packet_index)); |
1262 | lttng_live_stream_iterator_set_state(stream, LTTNG_LIVE_STREAM_ACTIVE_NO_DATA); | |
1263 | status = LTTNG_LIVE_ITERATOR_STATUS_ERROR; | |
1264 | goto end; | |
1265 | } | |
ca622546 | 1266 | |
4164020e | 1267 | goto end; |
7cdc2bab MD |
1268 | |
1269 | error: | |
4164020e | 1270 | status = viewer_status_to_live_iterator_status(viewer_status); |
f79c2d7a | 1271 | end: |
4164020e | 1272 | return status; |
7cdc2bab MD |
1273 | } |
1274 | ||
4164020e SM |
1275 | enum ctf_msg_iter_medium_status |
1276 | lttng_live_get_stream_bytes(struct lttng_live_msg_iter *lttng_live_msg_iter, | |
1277 | struct lttng_live_stream_iterator *stream, uint8_t *buf, | |
1278 | uint64_t offset, uint64_t req_len, uint64_t *recv_len) | |
7cdc2bab | 1279 | { |
4164020e SM |
1280 | enum ctf_msg_iter_medium_status status; |
1281 | enum lttng_live_viewer_status viewer_status; | |
1282 | struct lttng_viewer_trace_packet rp; | |
1283 | struct lttng_viewer_cmd cmd; | |
1284 | struct lttng_viewer_get_packet rq; | |
d721bef8 | 1285 | live_viewer_connection *viewer_connection = lttng_live_msg_iter->viewer_connection.get(); |
4164020e SM |
1286 | struct lttng_live_trace *trace = stream->trace; |
1287 | const size_t cmd_buf_len = sizeof(cmd) + sizeof(rq); | |
1288 | char cmd_buf[cmd_buf_len]; | |
1289 | uint32_t flags, rp_status; | |
1290 | ||
0f5c5d5c SM |
1291 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
1292 | "Requesting data from stream: cmd={}, " | |
1293 | "offset={}, request-len={}", | |
1294 | LTTNG_VIEWER_GET_PACKET, offset, req_len); | |
4164020e SM |
1295 | |
1296 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_PACKET); | |
1297 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); | |
1298 | cmd.cmd_version = htobe32(0); | |
1299 | ||
1300 | memset(&rq, 0, sizeof(rq)); | |
1301 | rq.stream_id = htobe64(stream->viewer_stream_id); | |
1302 | rq.offset = htobe64(offset); | |
1303 | rq.len = htobe32(req_len); | |
1304 | ||
1305 | /* | |
1306 | * Merge the cmd and connection request to prevent a write-write | |
1307 | * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the | |
1308 | * second write to be performed quickly in presence of Nagle's algorithm. | |
1309 | */ | |
1310 | memcpy(cmd_buf, &cmd, sizeof(cmd)); | |
1311 | memcpy(cmd_buf + sizeof(cmd), &rq, sizeof(rq)); | |
1312 | ||
1313 | viewer_status = lttng_live_send(viewer_connection, &cmd_buf, cmd_buf_len); | |
1314 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 1315 | viewer_handle_send_status(viewer_status, "get data packet command"); |
4164020e SM |
1316 | goto error_convert_status; |
1317 | } | |
1318 | ||
1319 | viewer_status = lttng_live_recv(viewer_connection, &rp, sizeof(rp)); | |
1320 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 1321 | viewer_handle_recv_status(viewer_status, "get data packet reply"); |
4164020e SM |
1322 | goto error_convert_status; |
1323 | } | |
1324 | ||
1325 | flags = be32toh(rp.flags); | |
1326 | rp_status = be32toh(rp.status); | |
1327 | ||
0f5c5d5c SM |
1328 | BT_CPPLOGD_SPEC( |
1329 | viewer_connection->logger, "Received response from relay daemon: cmd={}, response={}", | |
1330 | LTTNG_VIEWER_GET_PACKET, static_cast<lttng_viewer_get_packet_return_code>(rp_status)); | |
4164020e SM |
1331 | switch (rp_status) { |
1332 | case LTTNG_VIEWER_GET_PACKET_OK: | |
1333 | req_len = be32toh(rp.len); | |
0f5c5d5c SM |
1334 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
1335 | "Got packet from relay daemon: response={}, packet-len={}", | |
1336 | static_cast<lttng_viewer_get_packet_return_code>(rp_status), req_len); | |
4164020e SM |
1337 | break; |
1338 | case LTTNG_VIEWER_GET_PACKET_RETRY: | |
1339 | /* Unimplemented by relay daemon */ | |
1340 | status = CTF_MSG_ITER_MEDIUM_STATUS_AGAIN; | |
1341 | goto end; | |
1342 | case LTTNG_VIEWER_GET_PACKET_ERR: | |
1343 | if (flags & LTTNG_VIEWER_FLAG_NEW_METADATA) { | |
0f5c5d5c SM |
1344 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
1345 | "Marking trace as needing new metadata: " | |
1346 | "response={}, response-flag=NEW_METADATA, trace-id={}", | |
1347 | static_cast<lttng_viewer_get_packet_return_code>(rp_status), trace->id); | |
4164020e SM |
1348 | trace->metadata_stream_state = LTTNG_LIVE_METADATA_STREAM_STATE_NEEDED; |
1349 | } | |
1350 | if (flags & LTTNG_VIEWER_FLAG_NEW_STREAM) { | |
0f5c5d5c SM |
1351 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
1352 | "Marking all sessions as possibly needing new streams: " | |
1353 | "response={}, response-flag=NEW_STREAM", | |
1354 | static_cast<lttng_viewer_get_packet_return_code>(rp_status)); | |
4164020e SM |
1355 | lttng_live_need_new_streams(lttng_live_msg_iter); |
1356 | } | |
1357 | if (flags & (LTTNG_VIEWER_FLAG_NEW_METADATA | LTTNG_VIEWER_FLAG_NEW_STREAM)) { | |
1358 | status = CTF_MSG_ITER_MEDIUM_STATUS_AGAIN; | |
0f5c5d5c SM |
1359 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
1360 | "Reply with any one flags set means we should retry: response={}", | |
1361 | static_cast<lttng_viewer_get_packet_return_code>(rp_status)); | |
4164020e SM |
1362 | goto end; |
1363 | } | |
0f5c5d5c SM |
1364 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
1365 | "Received get_data_packet response: error"); | |
4164020e SM |
1366 | status = CTF_MSG_ITER_MEDIUM_STATUS_ERROR; |
1367 | goto end; | |
1368 | case LTTNG_VIEWER_GET_PACKET_EOF: | |
1369 | status = CTF_MSG_ITER_MEDIUM_STATUS_EOF; | |
1370 | goto end; | |
1371 | default: | |
0f5c5d5c SM |
1372 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
1373 | "Received get_data_packet response: unknown ({})", rp_status); | |
4164020e SM |
1374 | status = CTF_MSG_ITER_MEDIUM_STATUS_ERROR; |
1375 | goto end; | |
1376 | } | |
1377 | ||
1378 | if (req_len == 0) { | |
1379 | status = CTF_MSG_ITER_MEDIUM_STATUS_ERROR; | |
1380 | goto end; | |
1381 | } | |
1382 | ||
1383 | viewer_status = lttng_live_recv(viewer_connection, buf, req_len); | |
1384 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 1385 | viewer_handle_recv_status(viewer_status, "get data packet"); |
4164020e SM |
1386 | goto error_convert_status; |
1387 | } | |
1388 | *recv_len = req_len; | |
1389 | ||
1390 | status = CTF_MSG_ITER_MEDIUM_STATUS_OK; | |
1391 | goto end; | |
f79c2d7a | 1392 | |
535fb48a | 1393 | error_convert_status: |
4164020e | 1394 | status = viewer_status_to_ctf_msg_iter_medium_status(viewer_status); |
f79c2d7a | 1395 | end: |
4164020e | 1396 | return status; |
7cdc2bab MD |
1397 | } |
1398 | ||
1399 | /* | |
1400 | * Request new streams for a session. | |
1401 | */ | |
4164020e SM |
1402 | enum lttng_live_iterator_status |
1403 | lttng_live_session_get_new_streams(struct lttng_live_session *session, | |
1404 | bt_self_message_iterator *self_msg_iter) | |
7cdc2bab | 1405 | { |
4164020e SM |
1406 | enum lttng_live_iterator_status status = LTTNG_LIVE_ITERATOR_STATUS_OK; |
1407 | struct lttng_viewer_cmd cmd; | |
1408 | struct lttng_viewer_new_streams_request rq; | |
1409 | struct lttng_viewer_new_streams_response rp; | |
1410 | struct lttng_live_msg_iter *lttng_live_msg_iter = session->lttng_live_msg_iter; | |
1411 | enum lttng_live_viewer_status viewer_status; | |
d721bef8 | 1412 | live_viewer_connection *viewer_connection = lttng_live_msg_iter->viewer_connection.get(); |
4164020e SM |
1413 | uint32_t streams_count; |
1414 | const size_t cmd_buf_len = sizeof(cmd) + sizeof(rq); | |
1415 | char cmd_buf[cmd_buf_len]; | |
1416 | ||
1417 | if (!session->new_streams_needed) { | |
1418 | status = LTTNG_LIVE_ITERATOR_STATUS_OK; | |
1419 | goto end; | |
1420 | } | |
1421 | ||
0f5c5d5c SM |
1422 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
1423 | "Requesting new streams for session: cmd={}, session-id={}", | |
1424 | LTTNG_VIEWER_GET_NEW_STREAMS, session->id); | |
4164020e SM |
1425 | |
1426 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_NEW_STREAMS); | |
1427 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); | |
1428 | cmd.cmd_version = htobe32(0); | |
1429 | ||
1430 | memset(&rq, 0, sizeof(rq)); | |
1431 | rq.session_id = htobe64(session->id); | |
1432 | ||
1433 | /* | |
1434 | * Merge the cmd and connection request to prevent a write-write | |
1435 | * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the | |
1436 | * second write to be performed quickly in presence of Nagle's algorithm. | |
1437 | */ | |
1438 | memcpy(cmd_buf, &cmd, sizeof(cmd)); | |
1439 | memcpy(cmd_buf + sizeof(cmd), &rq, sizeof(rq)); | |
1440 | ||
1441 | viewer_status = lttng_live_send(viewer_connection, &cmd_buf, cmd_buf_len); | |
1442 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 1443 | viewer_handle_send_status(viewer_status, "get new streams command"); |
4164020e SM |
1444 | status = viewer_status_to_live_iterator_status(viewer_status); |
1445 | goto end; | |
1446 | } | |
1447 | ||
1448 | viewer_status = lttng_live_recv(viewer_connection, &rp, sizeof(rp)); | |
1449 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 1450 | viewer_handle_recv_status(viewer_status, "get new streams reply"); |
4164020e SM |
1451 | status = viewer_status_to_live_iterator_status(viewer_status); |
1452 | goto end; | |
1453 | } | |
1454 | ||
1455 | streams_count = be32toh(rp.streams_count); | |
1456 | ||
1457 | switch (be32toh(rp.status)) { | |
1458 | case LTTNG_VIEWER_NEW_STREAMS_OK: | |
1459 | session->new_streams_needed = false; | |
1460 | break; | |
1461 | case LTTNG_VIEWER_NEW_STREAMS_NO_NEW: | |
1462 | session->new_streams_needed = false; | |
1463 | goto end; | |
1464 | case LTTNG_VIEWER_NEW_STREAMS_HUP: | |
1465 | session->new_streams_needed = false; | |
1466 | session->closed = true; | |
1467 | status = LTTNG_LIVE_ITERATOR_STATUS_END; | |
1468 | goto end; | |
1469 | case LTTNG_VIEWER_NEW_STREAMS_ERR: | |
0f5c5d5c | 1470 | BT_CPPLOGD_SPEC(viewer_connection->logger, "Received get_new_streams response: error"); |
4164020e SM |
1471 | status = LTTNG_LIVE_ITERATOR_STATUS_ERROR; |
1472 | goto end; | |
1473 | default: | |
0f5c5d5c SM |
1474 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
1475 | "Received get_new_streams response: Unknown:" | |
1476 | "return code {}", | |
1477 | be32toh(rp.status)); | |
4164020e SM |
1478 | status = LTTNG_LIVE_ITERATOR_STATUS_ERROR; |
1479 | goto end; | |
1480 | } | |
1481 | ||
1482 | viewer_status = receive_streams(session, streams_count, self_msg_iter); | |
1483 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 1484 | viewer_handle_recv_status(viewer_status, "new streams"); |
4164020e SM |
1485 | status = viewer_status_to_live_iterator_status(viewer_status); |
1486 | goto end; | |
1487 | } | |
1488 | ||
1489 | status = LTTNG_LIVE_ITERATOR_STATUS_OK; | |
f79c2d7a | 1490 | end: |
4164020e | 1491 | return status; |
7cdc2bab MD |
1492 | } |
1493 | ||
d721bef8 SM |
1494 | enum lttng_live_viewer_status |
1495 | live_viewer_connection_create(const char *url, bool in_query, | |
1496 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
1497 | const bt2c::Logger& parentLogger, live_viewer_connection::UP& viewer) | |
7cdc2bab | 1498 | { |
d721bef8 | 1499 | auto viewer_connection = bt2s::make_unique<live_viewer_connection>(parentLogger); |
4164020e | 1500 | |
0f5c5d5c SM |
1501 | if (bt_socket_init(viewer_connection->logger) != 0) { |
1502 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Failed to init socket"); | |
d721bef8 | 1503 | return LTTNG_LIVE_VIEWER_STATUS_ERROR; |
4164020e SM |
1504 | } |
1505 | ||
4164020e SM |
1506 | viewer_connection->control_sock = BT_INVALID_SOCKET; |
1507 | viewer_connection->port = -1; | |
1508 | viewer_connection->in_query = in_query; | |
1509 | viewer_connection->lttng_live_msg_iter = lttng_live_msg_iter; | |
30d81897 | 1510 | viewer_connection->url = url; |
4164020e | 1511 | |
0f5c5d5c | 1512 | BT_CPPLOGD_SPEC(viewer_connection->logger, "Establishing connection to url \"{}\"...", url); |
d721bef8 SM |
1513 | const auto status = lttng_live_connect_viewer(viewer_connection.get()); |
1514 | ||
4164020e SM |
1515 | /* |
1516 | * Only print error and append cause in case of error. not in case of | |
1517 | * interruption. | |
1518 | */ | |
1519 | if (status == LTTNG_LIVE_VIEWER_STATUS_ERROR) { | |
0f5c5d5c SM |
1520 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
1521 | "Failed to establish connection: " | |
1522 | "url=\"{}\"", | |
1523 | url); | |
d721bef8 | 1524 | return status; |
4164020e | 1525 | } else if (status == LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED) { |
d721bef8 | 1526 | return status; |
4164020e | 1527 | } |
0f5c5d5c | 1528 | BT_CPPLOGD_SPEC(viewer_connection->logger, "Connection to url \"{}\" is established", url); |
4164020e | 1529 | |
d721bef8 SM |
1530 | viewer = std::move(viewer_connection); |
1531 | return LTTNG_LIVE_VIEWER_STATUS_OK; | |
7cdc2bab MD |
1532 | } |
1533 | ||
277bcb7f | 1534 | live_viewer_connection::~live_viewer_connection() |
7cdc2bab | 1535 | { |
277bcb7f | 1536 | BT_CPPLOGD_SPEC(this->logger, "Closing connection to relay: relay-url=\"{}\"", this->url); |
b9e6ec43 | 1537 | |
e5694f0e | 1538 | viewer_connection_close_socket(this); |
1cb3cdd7 | 1539 | |
4164020e | 1540 | bt_socket_fini(); |
7cdc2bab | 1541 | } |