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 | ||
4164020e SM |
614 | bt_component_class_query_method_status |
615 | live_viewer_connection_list_sessions(struct live_viewer_connection *viewer_connection, | |
bf35aaef | 616 | bt2::Value::Shared& user_result) |
7cdc2bab | 617 | { |
4164020e SM |
618 | enum lttng_live_viewer_status viewer_status; |
619 | struct lttng_viewer_cmd cmd; | |
620 | struct lttng_viewer_list_sessions list; | |
621 | uint32_t i, sessions_count; | |
bf35aaef | 622 | auto result = bt2::ArrayValue::create(); |
4164020e | 623 | |
0f5c5d5c SM |
624 | BT_CPPLOGD_SPEC(viewer_connection->logger, "Requesting list of sessions: cmd={}", |
625 | LTTNG_VIEWER_LIST_SESSIONS); | |
4164020e SM |
626 | |
627 | cmd.cmd = htobe32(LTTNG_VIEWER_LIST_SESSIONS); | |
628 | cmd.data_size = htobe64((uint64_t) 0); | |
629 | cmd.cmd_version = htobe32(0); | |
630 | ||
631 | viewer_status = lttng_live_send(viewer_connection, &cmd, sizeof(cmd)); | |
632 | if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_ERROR) { | |
0f5c5d5c SM |
633 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
634 | "Error sending list sessions command"); | |
bf35aaef | 635 | return BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR; |
4164020e | 636 | } else if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED) { |
bf35aaef | 637 | return BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_AGAIN; |
4164020e SM |
638 | } |
639 | ||
640 | viewer_status = lttng_live_recv(viewer_connection, &list, sizeof(list)); | |
641 | if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_ERROR) { | |
0f5c5d5c | 642 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Error receiving session list"); |
bf35aaef | 643 | return BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR; |
4164020e | 644 | } else if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED) { |
bf35aaef | 645 | return BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_AGAIN; |
4164020e SM |
646 | } |
647 | ||
648 | sessions_count = be32toh(list.sessions_count); | |
649 | for (i = 0; i < sessions_count; i++) { | |
650 | struct lttng_viewer_session lsession; | |
651 | ||
652 | viewer_status = lttng_live_recv(viewer_connection, &lsession, sizeof(lsession)); | |
653 | if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_ERROR) { | |
0f5c5d5c | 654 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Error receiving session:"); |
bf35aaef | 655 | return BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR; |
4164020e | 656 | } else if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED) { |
bf35aaef | 657 | return BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_AGAIN; |
4164020e SM |
658 | } |
659 | ||
660 | lsession.hostname[LTTNG_VIEWER_HOST_NAME_MAX - 1] = '\0'; | |
661 | lsession.session_name[LTTNG_VIEWER_NAME_MAX - 1] = '\0'; | |
bf35aaef | 662 | if (list_append_session(*result, viewer_connection->url, &lsession, viewer_connection)) { |
0f5c5d5c | 663 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Error appending session"); |
bf35aaef | 664 | return BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR; |
4164020e SM |
665 | } |
666 | } | |
667 | ||
bf35aaef SM |
668 | user_result = std::move(result); |
669 | return BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_OK; | |
7cdc2bab MD |
670 | } |
671 | ||
4164020e SM |
672 | static enum lttng_live_viewer_status |
673 | lttng_live_query_session_ids(struct lttng_live_msg_iter *lttng_live_msg_iter) | |
7cdc2bab | 674 | { |
4164020e SM |
675 | struct lttng_viewer_cmd cmd; |
676 | struct lttng_viewer_list_sessions list; | |
677 | struct lttng_viewer_session lsession; | |
678 | uint32_t i, sessions_count; | |
679 | uint64_t session_id; | |
680 | enum lttng_live_viewer_status status; | |
d721bef8 | 681 | live_viewer_connection *viewer_connection = lttng_live_msg_iter->viewer_connection.get(); |
4164020e | 682 | |
0f5c5d5c SM |
683 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
684 | "Asking the relay daemon for the list of sessions: cmd={}", | |
685 | LTTNG_VIEWER_LIST_SESSIONS); | |
4164020e SM |
686 | |
687 | cmd.cmd = htobe32(LTTNG_VIEWER_LIST_SESSIONS); | |
688 | cmd.data_size = htobe64((uint64_t) 0); | |
689 | cmd.cmd_version = htobe32(0); | |
690 | ||
691 | status = lttng_live_send(viewer_connection, &cmd, sizeof(cmd)); | |
692 | if (status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 693 | viewer_handle_send_status(status, "list sessions command"); |
4164020e SM |
694 | goto end; |
695 | } | |
696 | ||
697 | status = lttng_live_recv(viewer_connection, &list, sizeof(list)); | |
698 | if (status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 699 | viewer_handle_recv_status(status, "session list reply"); |
4164020e SM |
700 | goto end; |
701 | } | |
702 | ||
703 | sessions_count = be32toh(list.sessions_count); | |
704 | for (i = 0; i < sessions_count; i++) { | |
705 | status = lttng_live_recv(viewer_connection, &lsession, sizeof(lsession)); | |
706 | if (status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 707 | viewer_handle_recv_status(status, "session reply"); |
4164020e SM |
708 | goto end; |
709 | } | |
710 | lsession.hostname[LTTNG_VIEWER_HOST_NAME_MAX - 1] = '\0'; | |
711 | lsession.session_name[LTTNG_VIEWER_NAME_MAX - 1] = '\0'; | |
712 | session_id = be64toh(lsession.id); | |
713 | ||
0f5c5d5c SM |
714 | BT_CPPLOGI_SPEC(viewer_connection->logger, |
715 | "Adding session to internal list: " | |
716 | "session-id={}, hostname=\"{}\", session-name=\"{}\"", | |
717 | session_id, lsession.hostname, lsession.session_name); | |
4164020e SM |
718 | |
719 | if ((strncmp(lsession.session_name, viewer_connection->session_name->str, | |
720 | LTTNG_VIEWER_NAME_MAX) == 0) && | |
721 | (strncmp(lsession.hostname, viewer_connection->target_hostname->str, | |
722 | LTTNG_VIEWER_HOST_NAME_MAX) == 0)) { | |
723 | if (lttng_live_add_session(lttng_live_msg_iter, session_id, lsession.hostname, | |
724 | lsession.session_name)) { | |
0f5c5d5c SM |
725 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
726 | "Failed to add live session"); | |
4164020e SM |
727 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
728 | goto end; | |
729 | } | |
730 | } | |
731 | } | |
732 | ||
733 | status = LTTNG_LIVE_VIEWER_STATUS_OK; | |
7cdc2bab | 734 | |
f79c2d7a | 735 | end: |
4164020e | 736 | return status; |
7cdc2bab MD |
737 | } |
738 | ||
4164020e SM |
739 | enum lttng_live_viewer_status |
740 | lttng_live_create_viewer_session(struct lttng_live_msg_iter *lttng_live_msg_iter) | |
7cdc2bab | 741 | { |
4164020e SM |
742 | struct lttng_viewer_cmd cmd; |
743 | struct lttng_viewer_create_session_response resp; | |
744 | enum lttng_live_viewer_status status; | |
d721bef8 | 745 | live_viewer_connection *viewer_connection = lttng_live_msg_iter->viewer_connection.get(); |
4164020e | 746 | |
0f5c5d5c SM |
747 | BT_CPPLOGD_SPEC(viewer_connection->logger, "Creating a viewer session: cmd={}", |
748 | LTTNG_VIEWER_CREATE_SESSION); | |
4164020e SM |
749 | |
750 | cmd.cmd = htobe32(LTTNG_VIEWER_CREATE_SESSION); | |
751 | cmd.data_size = htobe64((uint64_t) 0); | |
752 | cmd.cmd_version = htobe32(0); | |
753 | ||
754 | status = lttng_live_send(viewer_connection, &cmd, sizeof(cmd)); | |
755 | if (status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 756 | viewer_handle_send_status(status, "create session command"); |
4164020e SM |
757 | goto end; |
758 | } | |
759 | ||
760 | status = lttng_live_recv(viewer_connection, &resp, sizeof(resp)); | |
761 | if (status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 762 | viewer_handle_recv_status(status, "create session reply"); |
4164020e SM |
763 | goto end; |
764 | } | |
765 | ||
766 | if (be32toh(resp.status) != LTTNG_VIEWER_CREATE_SESSION_OK) { | |
0f5c5d5c | 767 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Error creating viewer session"); |
4164020e SM |
768 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
769 | goto end; | |
770 | } | |
771 | ||
772 | status = lttng_live_query_session_ids(lttng_live_msg_iter); | |
773 | if (status == LTTNG_LIVE_VIEWER_STATUS_ERROR) { | |
0f5c5d5c SM |
774 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
775 | "Failed to query live viewer session ids"); | |
4164020e SM |
776 | goto end; |
777 | } else if (status == LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED) { | |
778 | goto end; | |
779 | } | |
7cdc2bab | 780 | |
f79c2d7a | 781 | end: |
4164020e | 782 | return status; |
7cdc2bab MD |
783 | } |
784 | ||
4164020e SM |
785 | static enum lttng_live_viewer_status receive_streams(struct lttng_live_session *session, |
786 | uint32_t stream_count, | |
787 | bt_self_message_iterator *self_msg_iter) | |
7cdc2bab | 788 | { |
4164020e SM |
789 | uint32_t i; |
790 | struct lttng_live_msg_iter *lttng_live_msg_iter = session->lttng_live_msg_iter; | |
791 | enum lttng_live_viewer_status status; | |
d721bef8 | 792 | live_viewer_connection *viewer_connection = lttng_live_msg_iter->viewer_connection.get(); |
4164020e | 793 | |
0f5c5d5c | 794 | BT_CPPLOGI_SPEC(viewer_connection->logger, "Getting {} new streams", stream_count); |
4164020e SM |
795 | for (i = 0; i < stream_count; i++) { |
796 | struct lttng_viewer_stream stream; | |
797 | struct lttng_live_stream_iterator *live_stream; | |
798 | uint64_t stream_id; | |
799 | uint64_t ctf_trace_id; | |
800 | ||
801 | status = lttng_live_recv(viewer_connection, &stream, sizeof(stream)); | |
802 | if (status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 803 | viewer_handle_recv_status(status, "stream reply"); |
4164020e SM |
804 | goto end; |
805 | } | |
806 | stream.path_name[LTTNG_VIEWER_PATH_MAX - 1] = '\0'; | |
807 | stream.channel_name[LTTNG_VIEWER_NAME_MAX - 1] = '\0'; | |
808 | stream_id = be64toh(stream.id); | |
809 | ctf_trace_id = be64toh(stream.ctf_trace_id); | |
810 | ||
811 | if (stream.metadata_flag) { | |
0f5c5d5c SM |
812 | BT_CPPLOGI_SPEC(viewer_connection->logger, " metadata stream {} : {}/{}", stream_id, |
813 | stream.path_name, stream.channel_name); | |
44bd6303 | 814 | if (lttng_live_metadata_create_stream(session, ctf_trace_id, stream_id)) { |
0f5c5d5c SM |
815 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
816 | "Error creating metadata stream"); | |
4164020e SM |
817 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
818 | goto end; | |
819 | } | |
820 | session->lazy_stream_msg_init = true; | |
821 | } else { | |
0f5c5d5c SM |
822 | BT_CPPLOGI_SPEC(viewer_connection->logger, " stream {} : {}/{}", stream_id, |
823 | stream.path_name, stream.channel_name); | |
4164020e SM |
824 | live_stream = |
825 | lttng_live_stream_iterator_create(session, ctf_trace_id, stream_id, self_msg_iter); | |
826 | if (!live_stream) { | |
0f5c5d5c | 827 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Error creating stream"); |
4164020e SM |
828 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
829 | goto end; | |
830 | } | |
831 | } | |
832 | } | |
833 | status = LTTNG_LIVE_VIEWER_STATUS_OK; | |
7cdc2bab | 834 | |
f79c2d7a | 835 | end: |
4164020e | 836 | return status; |
7cdc2bab MD |
837 | } |
838 | ||
4164020e SM |
839 | enum lttng_live_viewer_status lttng_live_session_attach(struct lttng_live_session *session, |
840 | bt_self_message_iterator *self_msg_iter) | |
7cdc2bab | 841 | { |
4164020e SM |
842 | struct lttng_viewer_cmd cmd; |
843 | enum lttng_live_viewer_status status; | |
844 | struct lttng_viewer_attach_session_request rq; | |
845 | struct lttng_viewer_attach_session_response rp; | |
846 | struct lttng_live_msg_iter *lttng_live_msg_iter = session->lttng_live_msg_iter; | |
d721bef8 | 847 | live_viewer_connection *viewer_connection = lttng_live_msg_iter->viewer_connection.get(); |
4164020e SM |
848 | uint64_t session_id = session->id; |
849 | uint32_t streams_count; | |
850 | const size_t cmd_buf_len = sizeof(cmd) + sizeof(rq); | |
851 | char cmd_buf[cmd_buf_len]; | |
852 | ||
0f5c5d5c SM |
853 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
854 | "Attaching to session: cmd={}, session-id={}, seek={}", | |
855 | LTTNG_VIEWER_ATTACH_SESSION, session_id, LTTNG_VIEWER_SEEK_LAST); | |
4164020e SM |
856 | |
857 | cmd.cmd = htobe32(LTTNG_VIEWER_ATTACH_SESSION); | |
858 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); | |
859 | cmd.cmd_version = htobe32(0); | |
860 | ||
861 | memset(&rq, 0, sizeof(rq)); | |
862 | rq.session_id = htobe64(session_id); | |
863 | // TODO: add cmd line parameter to select seek beginning | |
864 | // rq.seek = htobe32(LTTNG_VIEWER_SEEK_BEGINNING); | |
865 | rq.seek = htobe32(LTTNG_VIEWER_SEEK_LAST); | |
866 | ||
867 | /* | |
868 | * Merge the cmd and connection request to prevent a write-write | |
869 | * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the | |
870 | * second write to be performed quickly in presence of Nagle's algorithm. | |
871 | */ | |
872 | memcpy(cmd_buf, &cmd, sizeof(cmd)); | |
873 | memcpy(cmd_buf + sizeof(cmd), &rq, sizeof(rq)); | |
874 | status = lttng_live_send(viewer_connection, &cmd_buf, cmd_buf_len); | |
875 | if (status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 876 | viewer_handle_send_status(status, "attach session command"); |
4164020e SM |
877 | goto end; |
878 | } | |
879 | ||
880 | status = lttng_live_recv(viewer_connection, &rp, sizeof(rp)); | |
881 | if (status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 882 | viewer_handle_recv_status(status, "attach session reply"); |
4164020e SM |
883 | goto end; |
884 | } | |
885 | ||
886 | streams_count = be32toh(rp.streams_count); | |
887 | switch (be32toh(rp.status)) { | |
888 | case LTTNG_VIEWER_ATTACH_OK: | |
889 | break; | |
890 | case LTTNG_VIEWER_ATTACH_UNK: | |
0f5c5d5c SM |
891 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Session id {} is unknown", |
892 | session_id); | |
4164020e SM |
893 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
894 | goto end; | |
895 | case LTTNG_VIEWER_ATTACH_ALREADY: | |
0f5c5d5c SM |
896 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
897 | "There is already a viewer attached to this session"); | |
4164020e SM |
898 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
899 | goto end; | |
900 | case LTTNG_VIEWER_ATTACH_NOT_LIVE: | |
0f5c5d5c | 901 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Not a live session"); |
4164020e SM |
902 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
903 | goto end; | |
904 | case LTTNG_VIEWER_ATTACH_SEEK_ERR: | |
0f5c5d5c | 905 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Wrong seek parameter"); |
4164020e SM |
906 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
907 | goto end; | |
908 | default: | |
0f5c5d5c SM |
909 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Unknown attach return code {}", |
910 | be32toh(rp.status)); | |
4164020e SM |
911 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
912 | goto end; | |
913 | } | |
914 | ||
915 | /* We receive the initial list of streams. */ | |
916 | status = receive_streams(session, streams_count, self_msg_iter); | |
917 | switch (status) { | |
918 | case LTTNG_LIVE_VIEWER_STATUS_OK: | |
919 | break; | |
920 | case LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED: | |
921 | goto end; | |
922 | case LTTNG_LIVE_VIEWER_STATUS_ERROR: | |
0f5c5d5c | 923 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Error receiving streams"); |
4164020e SM |
924 | goto end; |
925 | default: | |
926 | bt_common_abort(); | |
927 | } | |
928 | ||
929 | session->attached = true; | |
930 | session->new_streams_needed = false; | |
7cdc2bab | 931 | |
eee8e741 | 932 | end: |
4164020e | 933 | return status; |
7cdc2bab MD |
934 | } |
935 | ||
4164020e | 936 | enum lttng_live_viewer_status lttng_live_session_detach(struct lttng_live_session *session) |
7cdc2bab | 937 | { |
4164020e SM |
938 | struct lttng_viewer_cmd cmd; |
939 | enum lttng_live_viewer_status status; | |
940 | struct lttng_viewer_detach_session_request rq; | |
941 | struct lttng_viewer_detach_session_response rp; | |
942 | struct lttng_live_msg_iter *lttng_live_msg_iter = session->lttng_live_msg_iter; | |
d721bef8 | 943 | live_viewer_connection *viewer_connection = lttng_live_msg_iter->viewer_connection.get(); |
4164020e SM |
944 | uint64_t session_id = session->id; |
945 | const size_t cmd_buf_len = sizeof(cmd) + sizeof(rq); | |
946 | char cmd_buf[cmd_buf_len]; | |
947 | ||
948 | /* | |
949 | * The session might already be detached and the viewer socket might | |
950 | * already been closed. This happens when calling this function when | |
951 | * tearing down the graph after an error. | |
952 | */ | |
953 | if (!session->attached || viewer_connection->control_sock == BT_INVALID_SOCKET) { | |
954 | return LTTNG_LIVE_VIEWER_STATUS_OK; | |
955 | } | |
956 | ||
0f5c5d5c SM |
957 | BT_CPPLOGD_SPEC(viewer_connection->logger, "Detaching from session: cmd={}, session-id={}", |
958 | LTTNG_VIEWER_DETACH_SESSION, session_id); | |
4164020e SM |
959 | |
960 | cmd.cmd = htobe32(LTTNG_VIEWER_DETACH_SESSION); | |
961 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); | |
962 | cmd.cmd_version = htobe32(0); | |
963 | ||
964 | memset(&rq, 0, sizeof(rq)); | |
965 | rq.session_id = htobe64(session_id); | |
966 | ||
967 | /* | |
968 | * Merge the cmd and connection request to prevent a write-write | |
969 | * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the | |
970 | * second write to be performed quickly in presence of Nagle's algorithm. | |
971 | */ | |
972 | memcpy(cmd_buf, &cmd, sizeof(cmd)); | |
973 | memcpy(cmd_buf + sizeof(cmd), &rq, sizeof(rq)); | |
974 | status = lttng_live_send(viewer_connection, &cmd_buf, cmd_buf_len); | |
975 | if (status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 976 | viewer_handle_send_status(status, "detach session command"); |
4164020e SM |
977 | goto end; |
978 | } | |
979 | ||
980 | status = lttng_live_recv(viewer_connection, &rp, sizeof(rp)); | |
981 | if (status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 982 | viewer_handle_recv_status(status, "detach session reply"); |
4164020e SM |
983 | goto end; |
984 | } | |
985 | ||
986 | switch (be32toh(rp.status)) { | |
987 | case LTTNG_VIEWER_DETACH_SESSION_OK: | |
988 | break; | |
989 | case LTTNG_VIEWER_DETACH_SESSION_UNK: | |
0f5c5d5c | 990 | BT_CPPLOGW_SPEC(viewer_connection->logger, "Session id {} is unknown", session_id); |
4164020e SM |
991 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
992 | goto end; | |
993 | case LTTNG_VIEWER_DETACH_SESSION_ERR: | |
0f5c5d5c | 994 | BT_CPPLOGW_SPEC(viewer_connection->logger, "Error detaching session id {}", session_id); |
4164020e SM |
995 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
996 | goto end; | |
997 | default: | |
0f5c5d5c SM |
998 | BT_CPPLOGE_SPEC(viewer_connection->logger, "Unknown detach return code {}", |
999 | be32toh(rp.status)); | |
4164020e SM |
1000 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
1001 | goto end; | |
1002 | } | |
1003 | ||
1004 | session->attached = false; | |
1005 | ||
1006 | status = LTTNG_LIVE_VIEWER_STATUS_OK; | |
7cdc2bab | 1007 | |
f79c2d7a | 1008 | end: |
4164020e | 1009 | return status; |
7cdc2bab MD |
1010 | } |
1011 | ||
4164020e | 1012 | enum lttng_live_get_one_metadata_status |
15fcc425 | 1013 | lttng_live_get_one_metadata_packet(struct lttng_live_trace *trace, std::vector<char>& buf) |
7cdc2bab | 1014 | { |
4164020e SM |
1015 | uint64_t len = 0; |
1016 | enum lttng_live_get_one_metadata_status status; | |
1017 | enum lttng_live_viewer_status viewer_status; | |
1018 | struct lttng_viewer_cmd cmd; | |
1019 | struct lttng_viewer_get_metadata rq; | |
1020 | struct lttng_viewer_metadata_packet rp; | |
76edb16f | 1021 | std::vector<char> data; |
4164020e SM |
1022 | struct lttng_live_session *session = trace->session; |
1023 | struct lttng_live_msg_iter *lttng_live_msg_iter = session->lttng_live_msg_iter; | |
e66be7c3 | 1024 | struct lttng_live_metadata *metadata = trace->metadata.get(); |
d721bef8 | 1025 | live_viewer_connection *viewer_connection = lttng_live_msg_iter->viewer_connection.get(); |
4164020e SM |
1026 | const size_t cmd_buf_len = sizeof(cmd) + sizeof(rq); |
1027 | char cmd_buf[cmd_buf_len]; | |
1028 | ||
0f5c5d5c SM |
1029 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
1030 | "Requesting new metadata for trace:" | |
1031 | "cmd={}, trace-id={}, metadata-stream-id={}", | |
1032 | LTTNG_VIEWER_GET_METADATA, trace->id, metadata->stream_id); | |
4164020e SM |
1033 | |
1034 | rq.stream_id = htobe64(metadata->stream_id); | |
1035 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_METADATA); | |
1036 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); | |
1037 | cmd.cmd_version = htobe32(0); | |
1038 | ||
1039 | /* | |
1040 | * Merge the cmd and connection request to prevent a write-write | |
1041 | * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the | |
1042 | * second write to be performed quickly in presence of Nagle's algorithm. | |
1043 | */ | |
1044 | memcpy(cmd_buf, &cmd, sizeof(cmd)); | |
1045 | memcpy(cmd_buf + sizeof(cmd), &rq, sizeof(rq)); | |
1046 | viewer_status = lttng_live_send(viewer_connection, &cmd_buf, cmd_buf_len); | |
1047 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 1048 | viewer_handle_send_status(viewer_status, "get metadata command"); |
4164020e SM |
1049 | status = (enum lttng_live_get_one_metadata_status) viewer_status; |
1050 | goto end; | |
1051 | } | |
1052 | ||
1053 | viewer_status = lttng_live_recv(viewer_connection, &rp, sizeof(rp)); | |
1054 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 1055 | viewer_handle_recv_status(viewer_status, "get metadata reply"); |
4164020e SM |
1056 | status = (enum lttng_live_get_one_metadata_status) viewer_status; |
1057 | goto end; | |
1058 | } | |
1059 | ||
1060 | switch (be32toh(rp.status)) { | |
1061 | case LTTNG_VIEWER_METADATA_OK: | |
0f5c5d5c | 1062 | BT_CPPLOGD_SPEC(viewer_connection->logger, "Received get_metadata response: ok"); |
4164020e SM |
1063 | break; |
1064 | case LTTNG_VIEWER_NO_NEW_METADATA: | |
0f5c5d5c | 1065 | BT_CPPLOGD_SPEC(viewer_connection->logger, "Received get_metadata response: no new"); |
4164020e SM |
1066 | status = LTTNG_LIVE_GET_ONE_METADATA_STATUS_END; |
1067 | goto end; | |
1068 | case LTTNG_VIEWER_METADATA_ERR: | |
1069 | /* | |
1070 | * The Relayd cannot find this stream id. Maybe its | |
1071 | * gone already. This can happen in short lived UST app | |
1072 | * in a per-pid session. | |
1073 | */ | |
0f5c5d5c | 1074 | BT_CPPLOGD_SPEC(viewer_connection->logger, "Received get_metadata response: error"); |
4164020e SM |
1075 | status = LTTNG_LIVE_GET_ONE_METADATA_STATUS_CLOSED; |
1076 | goto end; | |
1077 | default: | |
0f5c5d5c SM |
1078 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
1079 | "Received get_metadata response: unknown"); | |
4164020e SM |
1080 | status = LTTNG_LIVE_GET_ONE_METADATA_STATUS_ERROR; |
1081 | goto end; | |
1082 | } | |
1083 | ||
1084 | len = be64toh(rp.len); | |
c5ce3927 FD |
1085 | if (len == 0) { |
1086 | /* | |
1087 | * We received a `LTTNG_VIEWER_METADATA_OK` with a packet | |
1088 | * length of 0. This means we must try again. This scenario | |
1089 | * arises when a clear command is performed on an lttng session. | |
1090 | */ | |
0f5c5d5c SM |
1091 | BT_CPPLOGD_SPEC( |
1092 | viewer_connection->logger, | |
c5ce3927 FD |
1093 | "Expecting a metadata packet of size 0. Retry to get a packet from the relay."); |
1094 | goto empty_metadata_packet_retry; | |
1095 | } | |
1096 | ||
0f5c5d5c | 1097 | BT_CPPLOGD_SPEC(viewer_connection->logger, "Writing {} bytes to metadata", len); |
4164020e | 1098 | if (len <= 0) { |
0f5c5d5c | 1099 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Erroneous response length"); |
4164020e SM |
1100 | status = LTTNG_LIVE_GET_ONE_METADATA_STATUS_ERROR; |
1101 | goto end; | |
1102 | } | |
1103 | ||
76edb16f | 1104 | data.resize(len); |
4164020e | 1105 | |
76edb16f | 1106 | viewer_status = lttng_live_recv(viewer_connection, data.data(), len); |
4164020e | 1107 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { |
0f5c5d5c | 1108 | viewer_handle_recv_status(viewer_status, "get metadata packet"); |
4164020e SM |
1109 | status = (enum lttng_live_get_one_metadata_status) viewer_status; |
1110 | goto end; | |
1111 | } | |
1112 | ||
1113 | /* | |
1114 | * Write the metadata to the file handle. | |
1115 | */ | |
76edb16f | 1116 | buf.insert(buf.end(), data.begin(), data.end()); |
4164020e | 1117 | |
c5ce3927 | 1118 | empty_metadata_packet_retry: |
4164020e | 1119 | status = LTTNG_LIVE_GET_ONE_METADATA_STATUS_OK; |
c28512ab | 1120 | |
c28512ab | 1121 | end: |
4164020e | 1122 | return status; |
7cdc2bab MD |
1123 | } |
1124 | ||
1125 | /* | |
1126 | * Assign the fields from a lttng_viewer_index to a packet_index. | |
1127 | */ | |
4164020e SM |
1128 | static void lttng_index_to_packet_index(struct lttng_viewer_index *lindex, |
1129 | struct packet_index *pindex) | |
7cdc2bab | 1130 | { |
4164020e SM |
1131 | BT_ASSERT(lindex); |
1132 | BT_ASSERT(pindex); | |
1133 | ||
1134 | pindex->offset = be64toh(lindex->offset); | |
1135 | pindex->packet_size = be64toh(lindex->packet_size); | |
1136 | pindex->content_size = be64toh(lindex->content_size); | |
1137 | pindex->ts_cycles.timestamp_begin = be64toh(lindex->timestamp_begin); | |
1138 | pindex->ts_cycles.timestamp_end = be64toh(lindex->timestamp_end); | |
1139 | pindex->events_discarded = be64toh(lindex->events_discarded); | |
7cdc2bab MD |
1140 | } |
1141 | ||
4164020e | 1142 | static void lttng_live_need_new_streams(struct lttng_live_msg_iter *lttng_live_msg_iter) |
36e94ad6 | 1143 | { |
751aaa62 | 1144 | for (const auto& session : lttng_live_msg_iter->sessions) { |
0f5c5d5c SM |
1145 | BT_CPPLOGD_SPEC(lttng_live_msg_iter->logger, |
1146 | "Marking session as needing new streams: " | |
1147 | "session-id={}", | |
1148 | session->id); | |
4164020e SM |
1149 | session->new_streams_needed = true; |
1150 | } | |
36e94ad6 FD |
1151 | } |
1152 | ||
4164020e SM |
1153 | enum lttng_live_iterator_status |
1154 | lttng_live_get_next_index(struct lttng_live_msg_iter *lttng_live_msg_iter, | |
1155 | struct lttng_live_stream_iterator *stream, struct packet_index *index) | |
7cdc2bab | 1156 | { |
4164020e SM |
1157 | struct lttng_viewer_cmd cmd; |
1158 | struct lttng_viewer_get_next_index rq; | |
1159 | enum lttng_live_viewer_status viewer_status; | |
1160 | struct lttng_viewer_index rp; | |
1161 | enum lttng_live_iterator_status status; | |
d721bef8 | 1162 | live_viewer_connection *viewer_connection = lttng_live_msg_iter->viewer_connection.get(); |
4164020e SM |
1163 | struct lttng_live_trace *trace = stream->trace; |
1164 | const size_t cmd_buf_len = sizeof(cmd) + sizeof(rq); | |
1165 | char cmd_buf[cmd_buf_len]; | |
1166 | uint32_t flags, rp_status; | |
1167 | ||
0f5c5d5c SM |
1168 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
1169 | "Requesting next index for stream: cmd={}, " | |
1170 | "viewer-stream-id={}", | |
1171 | LTTNG_VIEWER_GET_NEXT_INDEX, stream->viewer_stream_id); | |
4164020e SM |
1172 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_NEXT_INDEX); |
1173 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); | |
1174 | cmd.cmd_version = htobe32(0); | |
1175 | ||
1176 | memset(&rq, 0, sizeof(rq)); | |
1177 | rq.stream_id = htobe64(stream->viewer_stream_id); | |
1178 | ||
1179 | /* | |
1180 | * Merge the cmd and connection request to prevent a write-write | |
1181 | * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the | |
1182 | * second write to be performed quickly in presence of Nagle's algorithm. | |
1183 | */ | |
1184 | memcpy(cmd_buf, &cmd, sizeof(cmd)); | |
1185 | memcpy(cmd_buf + sizeof(cmd), &rq, sizeof(rq)); | |
1186 | ||
1187 | viewer_status = lttng_live_send(viewer_connection, &cmd_buf, cmd_buf_len); | |
1188 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 1189 | viewer_handle_send_status(viewer_status, "get next index command"); |
4164020e SM |
1190 | goto error; |
1191 | } | |
1192 | ||
1193 | viewer_status = lttng_live_recv(viewer_connection, &rp, sizeof(rp)); | |
1194 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 1195 | viewer_handle_recv_status(viewer_status, "get next index reply"); |
4164020e SM |
1196 | goto error; |
1197 | } | |
1198 | ||
1199 | flags = be32toh(rp.flags); | |
1200 | rp_status = be32toh(rp.status); | |
1201 | ||
0f5c5d5c SM |
1202 | BT_CPPLOGD_SPEC( |
1203 | viewer_connection->logger, "Received response from relay daemon: cmd=%s, response={}", | |
1204 | LTTNG_VIEWER_GET_NEXT_INDEX, static_cast<lttng_viewer_next_index_return_code>(rp_status)); | |
ca622546 JG |
1205 | |
1206 | if (flags & LTTNG_VIEWER_FLAG_NEW_STREAM) { | |
0f5c5d5c SM |
1207 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
1208 | "Marking all sessions as possibly needing new streams: " | |
1209 | "response={}, response-flag=NEW_STREAM", | |
1210 | static_cast<lttng_viewer_next_index_return_code>(rp_status)); | |
ca622546 JG |
1211 | lttng_live_need_new_streams(lttng_live_msg_iter); |
1212 | } | |
1213 | ||
4164020e SM |
1214 | switch (rp_status) { |
1215 | case LTTNG_VIEWER_INDEX_INACTIVE: | |
1216 | { | |
1217 | uint64_t ctf_stream_class_id; | |
1218 | ||
1219 | memset(index, 0, sizeof(struct packet_index)); | |
1220 | index->ts_cycles.timestamp_end = be64toh(rp.timestamp_end); | |
1221 | stream->current_inactivity_ts = index->ts_cycles.timestamp_end; | |
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 | } | |
1229 | lttng_live_stream_iterator_set_state(stream, LTTNG_LIVE_STREAM_QUIESCENT); | |
1230 | status = LTTNG_LIVE_ITERATOR_STATUS_OK; | |
1231 | break; | |
1232 | } | |
1233 | case LTTNG_VIEWER_INDEX_OK: | |
1234 | { | |
1235 | uint64_t ctf_stream_class_id; | |
1236 | ||
1237 | lttng_index_to_packet_index(&rp, index); | |
1238 | ctf_stream_class_id = be64toh(rp.stream_id); | |
1239 | if (stream->ctf_stream_class_id.is_set) { | |
1240 | BT_ASSERT(stream->ctf_stream_class_id.value == ctf_stream_class_id); | |
1241 | } else { | |
1242 | stream->ctf_stream_class_id.value = ctf_stream_class_id; | |
1243 | stream->ctf_stream_class_id.is_set = true; | |
1244 | } | |
4164020e SM |
1245 | lttng_live_stream_iterator_set_state(stream, LTTNG_LIVE_STREAM_ACTIVE_DATA); |
1246 | ||
1247 | if (flags & LTTNG_VIEWER_FLAG_NEW_METADATA) { | |
0f5c5d5c SM |
1248 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
1249 | "Marking trace as needing new metadata: " | |
1250 | "response={}, response-flag=NEW_METADATA, trace-id={}", | |
1251 | static_cast<lttng_viewer_next_index_return_code>(rp_status), trace->id); | |
4164020e SM |
1252 | trace->metadata_stream_state = LTTNG_LIVE_METADATA_STREAM_STATE_NEEDED; |
1253 | } | |
4164020e SM |
1254 | status = LTTNG_LIVE_ITERATOR_STATUS_OK; |
1255 | break; | |
1256 | } | |
1257 | case LTTNG_VIEWER_INDEX_RETRY: | |
1258 | memset(index, 0, sizeof(struct packet_index)); | |
1259 | lttng_live_stream_iterator_set_state(stream, LTTNG_LIVE_STREAM_ACTIVE_NO_DATA); | |
1260 | status = LTTNG_LIVE_ITERATOR_STATUS_AGAIN; | |
1261 | goto end; | |
1262 | case LTTNG_VIEWER_INDEX_HUP: | |
1263 | memset(index, 0, sizeof(struct packet_index)); | |
1264 | index->offset = EOF; | |
1265 | lttng_live_stream_iterator_set_state(stream, LTTNG_LIVE_STREAM_EOF); | |
1266 | stream->has_stream_hung_up = true; | |
1267 | status = LTTNG_LIVE_ITERATOR_STATUS_END; | |
1268 | break; | |
1269 | case LTTNG_VIEWER_INDEX_ERR: | |
1270 | memset(index, 0, sizeof(struct packet_index)); | |
1271 | lttng_live_stream_iterator_set_state(stream, LTTNG_LIVE_STREAM_ACTIVE_NO_DATA); | |
1272 | status = LTTNG_LIVE_ITERATOR_STATUS_ERROR; | |
1273 | goto end; | |
1274 | default: | |
0f5c5d5c SM |
1275 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
1276 | "Received get_next_index response: unknown value"); | |
4164020e SM |
1277 | memset(index, 0, sizeof(struct packet_index)); |
1278 | lttng_live_stream_iterator_set_state(stream, LTTNG_LIVE_STREAM_ACTIVE_NO_DATA); | |
1279 | status = LTTNG_LIVE_ITERATOR_STATUS_ERROR; | |
1280 | goto end; | |
1281 | } | |
ca622546 | 1282 | |
4164020e | 1283 | goto end; |
7cdc2bab MD |
1284 | |
1285 | error: | |
4164020e | 1286 | status = viewer_status_to_live_iterator_status(viewer_status); |
f79c2d7a | 1287 | end: |
4164020e | 1288 | return status; |
7cdc2bab MD |
1289 | } |
1290 | ||
4164020e SM |
1291 | enum ctf_msg_iter_medium_status |
1292 | lttng_live_get_stream_bytes(struct lttng_live_msg_iter *lttng_live_msg_iter, | |
1293 | struct lttng_live_stream_iterator *stream, uint8_t *buf, | |
1294 | uint64_t offset, uint64_t req_len, uint64_t *recv_len) | |
7cdc2bab | 1295 | { |
4164020e SM |
1296 | enum ctf_msg_iter_medium_status status; |
1297 | enum lttng_live_viewer_status viewer_status; | |
1298 | struct lttng_viewer_trace_packet rp; | |
1299 | struct lttng_viewer_cmd cmd; | |
1300 | struct lttng_viewer_get_packet rq; | |
d721bef8 | 1301 | live_viewer_connection *viewer_connection = lttng_live_msg_iter->viewer_connection.get(); |
4164020e SM |
1302 | struct lttng_live_trace *trace = stream->trace; |
1303 | const size_t cmd_buf_len = sizeof(cmd) + sizeof(rq); | |
1304 | char cmd_buf[cmd_buf_len]; | |
1305 | uint32_t flags, rp_status; | |
1306 | ||
0f5c5d5c SM |
1307 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
1308 | "Requesting data from stream: cmd={}, " | |
1309 | "offset={}, request-len={}", | |
1310 | LTTNG_VIEWER_GET_PACKET, offset, req_len); | |
4164020e SM |
1311 | |
1312 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_PACKET); | |
1313 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); | |
1314 | cmd.cmd_version = htobe32(0); | |
1315 | ||
1316 | memset(&rq, 0, sizeof(rq)); | |
1317 | rq.stream_id = htobe64(stream->viewer_stream_id); | |
1318 | rq.offset = htobe64(offset); | |
1319 | rq.len = htobe32(req_len); | |
1320 | ||
1321 | /* | |
1322 | * Merge the cmd and connection request to prevent a write-write | |
1323 | * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the | |
1324 | * second write to be performed quickly in presence of Nagle's algorithm. | |
1325 | */ | |
1326 | memcpy(cmd_buf, &cmd, sizeof(cmd)); | |
1327 | memcpy(cmd_buf + sizeof(cmd), &rq, sizeof(rq)); | |
1328 | ||
1329 | viewer_status = lttng_live_send(viewer_connection, &cmd_buf, cmd_buf_len); | |
1330 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 1331 | viewer_handle_send_status(viewer_status, "get data packet command"); |
4164020e SM |
1332 | goto error_convert_status; |
1333 | } | |
1334 | ||
1335 | viewer_status = lttng_live_recv(viewer_connection, &rp, sizeof(rp)); | |
1336 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 1337 | viewer_handle_recv_status(viewer_status, "get data packet reply"); |
4164020e SM |
1338 | goto error_convert_status; |
1339 | } | |
1340 | ||
1341 | flags = be32toh(rp.flags); | |
1342 | rp_status = be32toh(rp.status); | |
1343 | ||
0f5c5d5c SM |
1344 | BT_CPPLOGD_SPEC( |
1345 | viewer_connection->logger, "Received response from relay daemon: cmd={}, response={}", | |
1346 | LTTNG_VIEWER_GET_PACKET, static_cast<lttng_viewer_get_packet_return_code>(rp_status)); | |
4164020e SM |
1347 | switch (rp_status) { |
1348 | case LTTNG_VIEWER_GET_PACKET_OK: | |
1349 | req_len = be32toh(rp.len); | |
0f5c5d5c SM |
1350 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
1351 | "Got packet from relay daemon: response={}, packet-len={}", | |
1352 | static_cast<lttng_viewer_get_packet_return_code>(rp_status), req_len); | |
4164020e SM |
1353 | break; |
1354 | case LTTNG_VIEWER_GET_PACKET_RETRY: | |
1355 | /* Unimplemented by relay daemon */ | |
1356 | status = CTF_MSG_ITER_MEDIUM_STATUS_AGAIN; | |
1357 | goto end; | |
1358 | case LTTNG_VIEWER_GET_PACKET_ERR: | |
1359 | if (flags & LTTNG_VIEWER_FLAG_NEW_METADATA) { | |
0f5c5d5c SM |
1360 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
1361 | "Marking trace as needing new metadata: " | |
1362 | "response={}, response-flag=NEW_METADATA, trace-id={}", | |
1363 | static_cast<lttng_viewer_get_packet_return_code>(rp_status), trace->id); | |
4164020e SM |
1364 | trace->metadata_stream_state = LTTNG_LIVE_METADATA_STREAM_STATE_NEEDED; |
1365 | } | |
1366 | if (flags & LTTNG_VIEWER_FLAG_NEW_STREAM) { | |
0f5c5d5c SM |
1367 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
1368 | "Marking all sessions as possibly needing new streams: " | |
1369 | "response={}, response-flag=NEW_STREAM", | |
1370 | static_cast<lttng_viewer_get_packet_return_code>(rp_status)); | |
4164020e SM |
1371 | lttng_live_need_new_streams(lttng_live_msg_iter); |
1372 | } | |
1373 | if (flags & (LTTNG_VIEWER_FLAG_NEW_METADATA | LTTNG_VIEWER_FLAG_NEW_STREAM)) { | |
1374 | status = CTF_MSG_ITER_MEDIUM_STATUS_AGAIN; | |
0f5c5d5c SM |
1375 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
1376 | "Reply with any one flags set means we should retry: response={}", | |
1377 | static_cast<lttng_viewer_get_packet_return_code>(rp_status)); | |
4164020e SM |
1378 | goto end; |
1379 | } | |
0f5c5d5c SM |
1380 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
1381 | "Received get_data_packet response: error"); | |
4164020e SM |
1382 | status = CTF_MSG_ITER_MEDIUM_STATUS_ERROR; |
1383 | goto end; | |
1384 | case LTTNG_VIEWER_GET_PACKET_EOF: | |
1385 | status = CTF_MSG_ITER_MEDIUM_STATUS_EOF; | |
1386 | goto end; | |
1387 | default: | |
0f5c5d5c SM |
1388 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
1389 | "Received get_data_packet response: unknown ({})", rp_status); | |
4164020e SM |
1390 | status = CTF_MSG_ITER_MEDIUM_STATUS_ERROR; |
1391 | goto end; | |
1392 | } | |
1393 | ||
1394 | if (req_len == 0) { | |
1395 | status = CTF_MSG_ITER_MEDIUM_STATUS_ERROR; | |
1396 | goto end; | |
1397 | } | |
1398 | ||
1399 | viewer_status = lttng_live_recv(viewer_connection, buf, req_len); | |
1400 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 1401 | viewer_handle_recv_status(viewer_status, "get data packet"); |
4164020e SM |
1402 | goto error_convert_status; |
1403 | } | |
1404 | *recv_len = req_len; | |
1405 | ||
1406 | status = CTF_MSG_ITER_MEDIUM_STATUS_OK; | |
1407 | goto end; | |
f79c2d7a | 1408 | |
535fb48a | 1409 | error_convert_status: |
4164020e | 1410 | status = viewer_status_to_ctf_msg_iter_medium_status(viewer_status); |
f79c2d7a | 1411 | end: |
4164020e | 1412 | return status; |
7cdc2bab MD |
1413 | } |
1414 | ||
1415 | /* | |
1416 | * Request new streams for a session. | |
1417 | */ | |
4164020e SM |
1418 | enum lttng_live_iterator_status |
1419 | lttng_live_session_get_new_streams(struct lttng_live_session *session, | |
1420 | bt_self_message_iterator *self_msg_iter) | |
7cdc2bab | 1421 | { |
4164020e SM |
1422 | enum lttng_live_iterator_status status = LTTNG_LIVE_ITERATOR_STATUS_OK; |
1423 | struct lttng_viewer_cmd cmd; | |
1424 | struct lttng_viewer_new_streams_request rq; | |
1425 | struct lttng_viewer_new_streams_response rp; | |
1426 | struct lttng_live_msg_iter *lttng_live_msg_iter = session->lttng_live_msg_iter; | |
1427 | enum lttng_live_viewer_status viewer_status; | |
d721bef8 | 1428 | live_viewer_connection *viewer_connection = lttng_live_msg_iter->viewer_connection.get(); |
4164020e SM |
1429 | uint32_t streams_count; |
1430 | const size_t cmd_buf_len = sizeof(cmd) + sizeof(rq); | |
1431 | char cmd_buf[cmd_buf_len]; | |
1432 | ||
1433 | if (!session->new_streams_needed) { | |
1434 | status = LTTNG_LIVE_ITERATOR_STATUS_OK; | |
1435 | goto end; | |
1436 | } | |
1437 | ||
0f5c5d5c SM |
1438 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
1439 | "Requesting new streams for session: cmd={}, session-id={}", | |
1440 | LTTNG_VIEWER_GET_NEW_STREAMS, session->id); | |
4164020e SM |
1441 | |
1442 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_NEW_STREAMS); | |
1443 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); | |
1444 | cmd.cmd_version = htobe32(0); | |
1445 | ||
1446 | memset(&rq, 0, sizeof(rq)); | |
1447 | rq.session_id = htobe64(session->id); | |
1448 | ||
1449 | /* | |
1450 | * Merge the cmd and connection request to prevent a write-write | |
1451 | * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the | |
1452 | * second write to be performed quickly in presence of Nagle's algorithm. | |
1453 | */ | |
1454 | memcpy(cmd_buf, &cmd, sizeof(cmd)); | |
1455 | memcpy(cmd_buf + sizeof(cmd), &rq, sizeof(rq)); | |
1456 | ||
1457 | viewer_status = lttng_live_send(viewer_connection, &cmd_buf, cmd_buf_len); | |
1458 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 1459 | viewer_handle_send_status(viewer_status, "get new streams command"); |
4164020e SM |
1460 | status = viewer_status_to_live_iterator_status(viewer_status); |
1461 | goto end; | |
1462 | } | |
1463 | ||
1464 | viewer_status = lttng_live_recv(viewer_connection, &rp, sizeof(rp)); | |
1465 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 1466 | viewer_handle_recv_status(viewer_status, "get new streams reply"); |
4164020e SM |
1467 | status = viewer_status_to_live_iterator_status(viewer_status); |
1468 | goto end; | |
1469 | } | |
1470 | ||
1471 | streams_count = be32toh(rp.streams_count); | |
1472 | ||
1473 | switch (be32toh(rp.status)) { | |
1474 | case LTTNG_VIEWER_NEW_STREAMS_OK: | |
1475 | session->new_streams_needed = false; | |
1476 | break; | |
1477 | case LTTNG_VIEWER_NEW_STREAMS_NO_NEW: | |
1478 | session->new_streams_needed = false; | |
1479 | goto end; | |
1480 | case LTTNG_VIEWER_NEW_STREAMS_HUP: | |
1481 | session->new_streams_needed = false; | |
1482 | session->closed = true; | |
1483 | status = LTTNG_LIVE_ITERATOR_STATUS_END; | |
1484 | goto end; | |
1485 | case LTTNG_VIEWER_NEW_STREAMS_ERR: | |
0f5c5d5c | 1486 | BT_CPPLOGD_SPEC(viewer_connection->logger, "Received get_new_streams response: error"); |
4164020e SM |
1487 | status = LTTNG_LIVE_ITERATOR_STATUS_ERROR; |
1488 | goto end; | |
1489 | default: | |
0f5c5d5c SM |
1490 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
1491 | "Received get_new_streams response: Unknown:" | |
1492 | "return code {}", | |
1493 | be32toh(rp.status)); | |
4164020e SM |
1494 | status = LTTNG_LIVE_ITERATOR_STATUS_ERROR; |
1495 | goto end; | |
1496 | } | |
1497 | ||
1498 | viewer_status = receive_streams(session, streams_count, self_msg_iter); | |
1499 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 1500 | viewer_handle_recv_status(viewer_status, "new streams"); |
4164020e SM |
1501 | status = viewer_status_to_live_iterator_status(viewer_status); |
1502 | goto end; | |
1503 | } | |
1504 | ||
1505 | status = LTTNG_LIVE_ITERATOR_STATUS_OK; | |
f79c2d7a | 1506 | end: |
4164020e | 1507 | return status; |
7cdc2bab MD |
1508 | } |
1509 | ||
d721bef8 SM |
1510 | enum lttng_live_viewer_status |
1511 | live_viewer_connection_create(const char *url, bool in_query, | |
1512 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
1513 | const bt2c::Logger& parentLogger, live_viewer_connection::UP& viewer) | |
7cdc2bab | 1514 | { |
d721bef8 | 1515 | auto viewer_connection = bt2s::make_unique<live_viewer_connection>(parentLogger); |
4164020e | 1516 | |
0f5c5d5c SM |
1517 | if (bt_socket_init(viewer_connection->logger) != 0) { |
1518 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Failed to init socket"); | |
d721bef8 | 1519 | return LTTNG_LIVE_VIEWER_STATUS_ERROR; |
4164020e SM |
1520 | } |
1521 | ||
4164020e SM |
1522 | viewer_connection->control_sock = BT_INVALID_SOCKET; |
1523 | viewer_connection->port = -1; | |
1524 | viewer_connection->in_query = in_query; | |
1525 | viewer_connection->lttng_live_msg_iter = lttng_live_msg_iter; | |
30d81897 | 1526 | viewer_connection->url = url; |
4164020e | 1527 | |
0f5c5d5c | 1528 | BT_CPPLOGD_SPEC(viewer_connection->logger, "Establishing connection to url \"{}\"...", url); |
d721bef8 SM |
1529 | const auto status = lttng_live_connect_viewer(viewer_connection.get()); |
1530 | ||
4164020e SM |
1531 | /* |
1532 | * Only print error and append cause in case of error. not in case of | |
1533 | * interruption. | |
1534 | */ | |
1535 | if (status == LTTNG_LIVE_VIEWER_STATUS_ERROR) { | |
0f5c5d5c SM |
1536 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
1537 | "Failed to establish connection: " | |
1538 | "url=\"{}\"", | |
1539 | url); | |
d721bef8 | 1540 | return status; |
4164020e | 1541 | } else if (status == LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED) { |
d721bef8 | 1542 | return status; |
4164020e | 1543 | } |
0f5c5d5c | 1544 | BT_CPPLOGD_SPEC(viewer_connection->logger, "Connection to url \"{}\" is established", url); |
4164020e | 1545 | |
d721bef8 SM |
1546 | viewer = std::move(viewer_connection); |
1547 | return LTTNG_LIVE_VIEWER_STATUS_OK; | |
7cdc2bab MD |
1548 | } |
1549 | ||
277bcb7f | 1550 | live_viewer_connection::~live_viewer_connection() |
7cdc2bab | 1551 | { |
277bcb7f | 1552 | BT_CPPLOGD_SPEC(this->logger, "Closing connection to relay: relay-url=\"{}\"", this->url); |
b9e6ec43 | 1553 | |
277bcb7f | 1554 | lttng_live_disconnect_viewer(this); |
1cb3cdd7 | 1555 | |
4164020e | 1556 | bt_socket_fini(); |
7cdc2bab | 1557 | } |