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 | ||
4164020e SM |
430 | static int list_update_session(bt_value *results, const struct lttng_viewer_session *session, |
431 | bool *_found, struct live_viewer_connection *viewer_connection) | |
7cdc2bab | 432 | { |
4164020e SM |
433 | int ret = 0; |
434 | uint64_t i, len; | |
435 | bt_value *map = NULL; | |
436 | bt_value *hostname = NULL; | |
437 | bt_value *session_name = NULL; | |
438 | bt_value *btval = NULL; | |
439 | bool found = false; | |
440 | ||
441 | len = bt_value_array_get_length(results); | |
442 | for (i = 0; i < len; i++) { | |
443 | const char *hostname_str = NULL; | |
444 | const char *session_name_str = NULL; | |
445 | ||
446 | map = bt_value_array_borrow_element_by_index(results, i); | |
447 | hostname = bt_value_map_borrow_entry_value(map, "target-hostname"); | |
448 | if (!hostname) { | |
0f5c5d5c SM |
449 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
450 | "Error borrowing \"target-hostname\" entry."); | |
4164020e SM |
451 | ret = -1; |
452 | goto end; | |
453 | } | |
454 | session_name = bt_value_map_borrow_entry_value(map, "session-name"); | |
455 | if (!session_name) { | |
0f5c5d5c SM |
456 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
457 | "Error borrowing \"session-name\" entry."); | |
4164020e SM |
458 | ret = -1; |
459 | goto end; | |
460 | } | |
461 | hostname_str = bt_value_string_get(hostname); | |
462 | session_name_str = bt_value_string_get(session_name); | |
463 | ||
464 | if (strcmp(session->hostname, hostname_str) == 0 && | |
465 | strcmp(session->session_name, session_name_str) == 0) { | |
466 | int64_t val; | |
467 | uint32_t streams = be32toh(session->streams); | |
468 | uint32_t clients = be32toh(session->clients); | |
469 | ||
470 | found = true; | |
471 | ||
472 | btval = bt_value_map_borrow_entry_value(map, "stream-count"); | |
473 | if (!btval) { | |
0f5c5d5c SM |
474 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
475 | "Error borrowing \"stream-count\" entry."); | |
4164020e SM |
476 | ret = -1; |
477 | goto end; | |
478 | } | |
479 | val = bt_value_integer_unsigned_get(btval); | |
480 | /* sum */ | |
481 | val += streams; | |
482 | bt_value_integer_unsigned_set(btval, val); | |
483 | ||
484 | btval = bt_value_map_borrow_entry_value(map, "client-count"); | |
485 | if (!btval) { | |
0f5c5d5c SM |
486 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
487 | "Error borrowing \"client-count\" entry."); | |
4164020e SM |
488 | ret = -1; |
489 | goto end; | |
490 | } | |
491 | val = bt_value_integer_unsigned_get(btval); | |
492 | /* max */ | |
493 | val = bt_max_t(int64_t, clients, val); | |
494 | bt_value_integer_unsigned_set(btval, val); | |
495 | } | |
496 | ||
497 | if (found) { | |
498 | break; | |
499 | } | |
500 | } | |
7cdc2bab | 501 | end: |
4164020e SM |
502 | *_found = found; |
503 | return ret; | |
7cdc2bab MD |
504 | } |
505 | ||
30d81897 | 506 | static int list_append_session(bt_value *results, const std::string& base_url, |
4164020e SM |
507 | const struct lttng_viewer_session *session, |
508 | struct live_viewer_connection *viewer_connection) | |
7cdc2bab | 509 | { |
4164020e | 510 | int ret = 0; |
4164020e SM |
511 | bt_value_map_insert_entry_status insert_status; |
512 | bt_value_array_append_element_status append_status; | |
513 | bt_value *map = NULL; | |
4164020e SM |
514 | bool found = false; |
515 | ||
516 | /* | |
517 | * If the session already exists, add the stream count to it, | |
518 | * and do max of client counts. | |
519 | */ | |
520 | ret = list_update_session(results, session, &found, viewer_connection); | |
521 | if (ret || found) { | |
522 | goto end; | |
523 | } | |
524 | ||
525 | map = bt_value_map_create(); | |
526 | if (!map) { | |
0f5c5d5c | 527 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Error creating map value."); |
4164020e SM |
528 | ret = -1; |
529 | goto end; | |
530 | } | |
531 | ||
30d81897 | 532 | if (base_url.empty()) { |
0f5c5d5c SM |
533 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
534 | "Error: base_url length smaller than 1."); | |
4164020e SM |
535 | ret = -1; |
536 | goto end; | |
537 | } | |
30d81897 | 538 | |
4164020e SM |
539 | /* |
540 | * key = "url", | |
541 | * value = <string>, | |
542 | */ | |
4181bd5d SM |
543 | insert_status = bt_value_map_insert_string_entry( |
544 | map, "url", | |
30d81897 | 545 | fmt::format("{}/host/{}/{}", base_url, session->hostname, session->session_name).c_str()); |
4164020e | 546 | if (insert_status != BT_VALUE_MAP_INSERT_ENTRY_STATUS_OK) { |
0f5c5d5c | 547 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Error inserting \"url\" entry."); |
4164020e SM |
548 | ret = -1; |
549 | goto end; | |
550 | } | |
551 | ||
552 | /* | |
553 | * key = "target-hostname", | |
554 | * value = <string>, | |
555 | */ | |
556 | insert_status = bt_value_map_insert_string_entry(map, "target-hostname", session->hostname); | |
557 | if (insert_status != BT_VALUE_MAP_INSERT_ENTRY_STATUS_OK) { | |
0f5c5d5c SM |
558 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
559 | "Error inserting \"target-hostname\" entry."); | |
4164020e SM |
560 | ret = -1; |
561 | goto end; | |
562 | } | |
563 | ||
564 | /* | |
565 | * key = "session-name", | |
566 | * value = <string>, | |
567 | */ | |
568 | insert_status = bt_value_map_insert_string_entry(map, "session-name", session->session_name); | |
569 | if (insert_status != BT_VALUE_MAP_INSERT_ENTRY_STATUS_OK) { | |
0f5c5d5c SM |
570 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
571 | "Error inserting \"session-name\" entry."); | |
4164020e SM |
572 | ret = -1; |
573 | goto end; | |
574 | } | |
575 | ||
576 | /* | |
577 | * key = "timer-us", | |
578 | * value = <integer>, | |
579 | */ | |
580 | { | |
581 | uint32_t live_timer = be32toh(session->live_timer); | |
582 | ||
583 | insert_status = bt_value_map_insert_unsigned_integer_entry(map, "timer-us", live_timer); | |
584 | if (insert_status != BT_VALUE_MAP_INSERT_ENTRY_STATUS_OK) { | |
0f5c5d5c SM |
585 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
586 | "Error inserting \"timer-us\" entry."); | |
4164020e SM |
587 | ret = -1; |
588 | goto end; | |
589 | } | |
590 | } | |
591 | ||
592 | /* | |
593 | * key = "stream-count", | |
594 | * value = <integer>, | |
595 | */ | |
596 | { | |
597 | uint32_t streams = be32toh(session->streams); | |
598 | ||
599 | insert_status = bt_value_map_insert_unsigned_integer_entry(map, "stream-count", streams); | |
600 | if (insert_status != BT_VALUE_MAP_INSERT_ENTRY_STATUS_OK) { | |
0f5c5d5c SM |
601 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
602 | "Error inserting \"stream-count\" entry."); | |
4164020e SM |
603 | ret = -1; |
604 | goto end; | |
605 | } | |
606 | } | |
607 | ||
608 | /* | |
609 | * key = "client-count", | |
610 | * value = <integer>, | |
611 | */ | |
612 | { | |
613 | uint32_t clients = be32toh(session->clients); | |
614 | ||
615 | insert_status = bt_value_map_insert_unsigned_integer_entry(map, "client-count", clients); | |
616 | if (insert_status != BT_VALUE_MAP_INSERT_ENTRY_STATUS_OK) { | |
0f5c5d5c SM |
617 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
618 | "Error inserting \"client-count\" entry."); | |
4164020e SM |
619 | ret = -1; |
620 | goto end; | |
621 | } | |
622 | } | |
623 | ||
624 | append_status = bt_value_array_append_element(results, map); | |
625 | if (append_status != BT_VALUE_ARRAY_APPEND_ELEMENT_STATUS_OK) { | |
0f5c5d5c | 626 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Error appending map to results."); |
4164020e SM |
627 | ret = -1; |
628 | } | |
14f28187 | 629 | |
7cdc2bab | 630 | end: |
4164020e SM |
631 | BT_VALUE_PUT_REF_AND_RESET(map); |
632 | return ret; | |
7cdc2bab MD |
633 | } |
634 | ||
635 | /* | |
636 | * Data structure returned: | |
637 | * | |
638 | * { | |
639 | * <array> = { | |
640 | * [n] = { | |
641 | * <map> = { | |
642 | * { | |
643 | * key = "url", | |
644 | * value = <string>, | |
645 | * }, | |
646 | * { | |
647 | * key = "target-hostname", | |
648 | * value = <string>, | |
649 | * }, | |
650 | * { | |
651 | * key = "session-name", | |
652 | * value = <string>, | |
653 | * }, | |
654 | * { | |
655 | * key = "timer-us", | |
656 | * value = <integer>, | |
657 | * }, | |
658 | * { | |
659 | * key = "stream-count", | |
660 | * value = <integer>, | |
661 | * }, | |
662 | * { | |
663 | * key = "client-count", | |
664 | * value = <integer>, | |
665 | * }, | |
666 | * }, | |
667 | * } | |
668 | * } | |
669 | */ | |
670 | ||
4164020e SM |
671 | bt_component_class_query_method_status |
672 | live_viewer_connection_list_sessions(struct live_viewer_connection *viewer_connection, | |
673 | const bt_value **user_result) | |
7cdc2bab | 674 | { |
4164020e SM |
675 | bt_component_class_query_method_status status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_OK; |
676 | bt_value *result = NULL; | |
677 | enum lttng_live_viewer_status viewer_status; | |
678 | struct lttng_viewer_cmd cmd; | |
679 | struct lttng_viewer_list_sessions list; | |
680 | uint32_t i, sessions_count; | |
681 | ||
682 | result = bt_value_array_create(); | |
683 | if (!result) { | |
0f5c5d5c | 684 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Error creating array"); |
4164020e SM |
685 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_MEMORY_ERROR; |
686 | goto error; | |
687 | } | |
688 | ||
0f5c5d5c SM |
689 | BT_CPPLOGD_SPEC(viewer_connection->logger, "Requesting list of sessions: cmd={}", |
690 | LTTNG_VIEWER_LIST_SESSIONS); | |
4164020e SM |
691 | |
692 | cmd.cmd = htobe32(LTTNG_VIEWER_LIST_SESSIONS); | |
693 | cmd.data_size = htobe64((uint64_t) 0); | |
694 | cmd.cmd_version = htobe32(0); | |
695 | ||
696 | viewer_status = lttng_live_send(viewer_connection, &cmd, sizeof(cmd)); | |
697 | if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_ERROR) { | |
0f5c5d5c SM |
698 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
699 | "Error sending list sessions command"); | |
4164020e SM |
700 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR; |
701 | goto error; | |
702 | } else if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED) { | |
703 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_AGAIN; | |
704 | goto error; | |
705 | } | |
706 | ||
707 | viewer_status = lttng_live_recv(viewer_connection, &list, sizeof(list)); | |
708 | if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_ERROR) { | |
0f5c5d5c | 709 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Error receiving session list"); |
4164020e SM |
710 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR; |
711 | goto error; | |
712 | } else if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED) { | |
713 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_AGAIN; | |
714 | goto error; | |
715 | } | |
716 | ||
717 | sessions_count = be32toh(list.sessions_count); | |
718 | for (i = 0; i < sessions_count; i++) { | |
719 | struct lttng_viewer_session lsession; | |
720 | ||
721 | viewer_status = lttng_live_recv(viewer_connection, &lsession, sizeof(lsession)); | |
722 | if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_ERROR) { | |
0f5c5d5c | 723 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Error receiving session:"); |
4164020e SM |
724 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR; |
725 | goto error; | |
726 | } else if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED) { | |
727 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_AGAIN; | |
728 | goto error; | |
729 | } | |
730 | ||
731 | lsession.hostname[LTTNG_VIEWER_HOST_NAME_MAX - 1] = '\0'; | |
732 | lsession.session_name[LTTNG_VIEWER_NAME_MAX - 1] = '\0'; | |
733 | if (list_append_session(result, viewer_connection->url, &lsession, viewer_connection)) { | |
0f5c5d5c | 734 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Error appending session"); |
4164020e SM |
735 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR; |
736 | goto error; | |
737 | } | |
738 | } | |
739 | ||
740 | *user_result = result; | |
741 | goto end; | |
7cdc2bab | 742 | error: |
4164020e | 743 | BT_VALUE_PUT_REF_AND_RESET(result); |
7cdc2bab | 744 | end: |
4164020e | 745 | return status; |
7cdc2bab MD |
746 | } |
747 | ||
4164020e SM |
748 | static enum lttng_live_viewer_status |
749 | lttng_live_query_session_ids(struct lttng_live_msg_iter *lttng_live_msg_iter) | |
7cdc2bab | 750 | { |
4164020e SM |
751 | struct lttng_viewer_cmd cmd; |
752 | struct lttng_viewer_list_sessions list; | |
753 | struct lttng_viewer_session lsession; | |
754 | uint32_t i, sessions_count; | |
755 | uint64_t session_id; | |
756 | enum lttng_live_viewer_status status; | |
d721bef8 | 757 | live_viewer_connection *viewer_connection = lttng_live_msg_iter->viewer_connection.get(); |
4164020e | 758 | |
0f5c5d5c SM |
759 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
760 | "Asking the relay daemon for the list of sessions: cmd={}", | |
761 | LTTNG_VIEWER_LIST_SESSIONS); | |
4164020e SM |
762 | |
763 | cmd.cmd = htobe32(LTTNG_VIEWER_LIST_SESSIONS); | |
764 | cmd.data_size = htobe64((uint64_t) 0); | |
765 | cmd.cmd_version = htobe32(0); | |
766 | ||
767 | status = lttng_live_send(viewer_connection, &cmd, sizeof(cmd)); | |
768 | if (status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 769 | viewer_handle_send_status(status, "list sessions command"); |
4164020e SM |
770 | goto end; |
771 | } | |
772 | ||
773 | status = lttng_live_recv(viewer_connection, &list, sizeof(list)); | |
774 | if (status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 775 | viewer_handle_recv_status(status, "session list reply"); |
4164020e SM |
776 | goto end; |
777 | } | |
778 | ||
779 | sessions_count = be32toh(list.sessions_count); | |
780 | for (i = 0; i < sessions_count; i++) { | |
781 | status = lttng_live_recv(viewer_connection, &lsession, sizeof(lsession)); | |
782 | if (status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 783 | viewer_handle_recv_status(status, "session reply"); |
4164020e SM |
784 | goto end; |
785 | } | |
786 | lsession.hostname[LTTNG_VIEWER_HOST_NAME_MAX - 1] = '\0'; | |
787 | lsession.session_name[LTTNG_VIEWER_NAME_MAX - 1] = '\0'; | |
788 | session_id = be64toh(lsession.id); | |
789 | ||
0f5c5d5c SM |
790 | BT_CPPLOGI_SPEC(viewer_connection->logger, |
791 | "Adding session to internal list: " | |
792 | "session-id={}, hostname=\"{}\", session-name=\"{}\"", | |
793 | session_id, lsession.hostname, lsession.session_name); | |
4164020e SM |
794 | |
795 | if ((strncmp(lsession.session_name, viewer_connection->session_name->str, | |
796 | LTTNG_VIEWER_NAME_MAX) == 0) && | |
797 | (strncmp(lsession.hostname, viewer_connection->target_hostname->str, | |
798 | LTTNG_VIEWER_HOST_NAME_MAX) == 0)) { | |
799 | if (lttng_live_add_session(lttng_live_msg_iter, session_id, lsession.hostname, | |
800 | lsession.session_name)) { | |
0f5c5d5c SM |
801 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
802 | "Failed to add live session"); | |
4164020e SM |
803 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
804 | goto end; | |
805 | } | |
806 | } | |
807 | } | |
808 | ||
809 | status = LTTNG_LIVE_VIEWER_STATUS_OK; | |
7cdc2bab | 810 | |
f79c2d7a | 811 | end: |
4164020e | 812 | return status; |
7cdc2bab MD |
813 | } |
814 | ||
4164020e SM |
815 | enum lttng_live_viewer_status |
816 | lttng_live_create_viewer_session(struct lttng_live_msg_iter *lttng_live_msg_iter) | |
7cdc2bab | 817 | { |
4164020e SM |
818 | struct lttng_viewer_cmd cmd; |
819 | struct lttng_viewer_create_session_response resp; | |
820 | enum lttng_live_viewer_status status; | |
d721bef8 | 821 | live_viewer_connection *viewer_connection = lttng_live_msg_iter->viewer_connection.get(); |
4164020e | 822 | |
0f5c5d5c SM |
823 | BT_CPPLOGD_SPEC(viewer_connection->logger, "Creating a viewer session: cmd={}", |
824 | LTTNG_VIEWER_CREATE_SESSION); | |
4164020e SM |
825 | |
826 | cmd.cmd = htobe32(LTTNG_VIEWER_CREATE_SESSION); | |
827 | cmd.data_size = htobe64((uint64_t) 0); | |
828 | cmd.cmd_version = htobe32(0); | |
829 | ||
830 | status = lttng_live_send(viewer_connection, &cmd, sizeof(cmd)); | |
831 | if (status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 832 | viewer_handle_send_status(status, "create session command"); |
4164020e SM |
833 | goto end; |
834 | } | |
835 | ||
836 | status = lttng_live_recv(viewer_connection, &resp, sizeof(resp)); | |
837 | if (status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 838 | viewer_handle_recv_status(status, "create session reply"); |
4164020e SM |
839 | goto end; |
840 | } | |
841 | ||
842 | if (be32toh(resp.status) != LTTNG_VIEWER_CREATE_SESSION_OK) { | |
0f5c5d5c | 843 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Error creating viewer session"); |
4164020e SM |
844 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
845 | goto end; | |
846 | } | |
847 | ||
848 | status = lttng_live_query_session_ids(lttng_live_msg_iter); | |
849 | if (status == LTTNG_LIVE_VIEWER_STATUS_ERROR) { | |
0f5c5d5c SM |
850 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
851 | "Failed to query live viewer session ids"); | |
4164020e SM |
852 | goto end; |
853 | } else if (status == LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED) { | |
854 | goto end; | |
855 | } | |
7cdc2bab | 856 | |
f79c2d7a | 857 | end: |
4164020e | 858 | return status; |
7cdc2bab MD |
859 | } |
860 | ||
4164020e SM |
861 | static enum lttng_live_viewer_status receive_streams(struct lttng_live_session *session, |
862 | uint32_t stream_count, | |
863 | bt_self_message_iterator *self_msg_iter) | |
7cdc2bab | 864 | { |
4164020e SM |
865 | uint32_t i; |
866 | struct lttng_live_msg_iter *lttng_live_msg_iter = session->lttng_live_msg_iter; | |
867 | enum lttng_live_viewer_status status; | |
d721bef8 | 868 | live_viewer_connection *viewer_connection = lttng_live_msg_iter->viewer_connection.get(); |
4164020e | 869 | |
0f5c5d5c | 870 | BT_CPPLOGI_SPEC(viewer_connection->logger, "Getting {} new streams", stream_count); |
4164020e SM |
871 | for (i = 0; i < stream_count; i++) { |
872 | struct lttng_viewer_stream stream; | |
873 | struct lttng_live_stream_iterator *live_stream; | |
874 | uint64_t stream_id; | |
875 | uint64_t ctf_trace_id; | |
876 | ||
877 | status = lttng_live_recv(viewer_connection, &stream, sizeof(stream)); | |
878 | if (status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 879 | viewer_handle_recv_status(status, "stream reply"); |
4164020e SM |
880 | goto end; |
881 | } | |
882 | stream.path_name[LTTNG_VIEWER_PATH_MAX - 1] = '\0'; | |
883 | stream.channel_name[LTTNG_VIEWER_NAME_MAX - 1] = '\0'; | |
884 | stream_id = be64toh(stream.id); | |
885 | ctf_trace_id = be64toh(stream.ctf_trace_id); | |
886 | ||
887 | if (stream.metadata_flag) { | |
0f5c5d5c SM |
888 | BT_CPPLOGI_SPEC(viewer_connection->logger, " metadata stream {} : {}/{}", stream_id, |
889 | stream.path_name, stream.channel_name); | |
44bd6303 | 890 | if (lttng_live_metadata_create_stream(session, ctf_trace_id, stream_id)) { |
0f5c5d5c SM |
891 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
892 | "Error creating metadata stream"); | |
4164020e SM |
893 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
894 | goto end; | |
895 | } | |
896 | session->lazy_stream_msg_init = true; | |
897 | } else { | |
0f5c5d5c SM |
898 | BT_CPPLOGI_SPEC(viewer_connection->logger, " stream {} : {}/{}", stream_id, |
899 | stream.path_name, stream.channel_name); | |
4164020e SM |
900 | live_stream = |
901 | lttng_live_stream_iterator_create(session, ctf_trace_id, stream_id, self_msg_iter); | |
902 | if (!live_stream) { | |
0f5c5d5c | 903 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Error creating stream"); |
4164020e SM |
904 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
905 | goto end; | |
906 | } | |
907 | } | |
908 | } | |
909 | status = LTTNG_LIVE_VIEWER_STATUS_OK; | |
7cdc2bab | 910 | |
f79c2d7a | 911 | end: |
4164020e | 912 | return status; |
7cdc2bab MD |
913 | } |
914 | ||
4164020e SM |
915 | enum lttng_live_viewer_status lttng_live_session_attach(struct lttng_live_session *session, |
916 | bt_self_message_iterator *self_msg_iter) | |
7cdc2bab | 917 | { |
4164020e SM |
918 | struct lttng_viewer_cmd cmd; |
919 | enum lttng_live_viewer_status status; | |
920 | struct lttng_viewer_attach_session_request rq; | |
921 | struct lttng_viewer_attach_session_response rp; | |
922 | struct lttng_live_msg_iter *lttng_live_msg_iter = session->lttng_live_msg_iter; | |
d721bef8 | 923 | live_viewer_connection *viewer_connection = lttng_live_msg_iter->viewer_connection.get(); |
4164020e SM |
924 | uint64_t session_id = session->id; |
925 | uint32_t streams_count; | |
926 | const size_t cmd_buf_len = sizeof(cmd) + sizeof(rq); | |
927 | char cmd_buf[cmd_buf_len]; | |
928 | ||
0f5c5d5c SM |
929 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
930 | "Attaching to session: cmd={}, session-id={}, seek={}", | |
931 | LTTNG_VIEWER_ATTACH_SESSION, session_id, LTTNG_VIEWER_SEEK_LAST); | |
4164020e SM |
932 | |
933 | cmd.cmd = htobe32(LTTNG_VIEWER_ATTACH_SESSION); | |
934 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); | |
935 | cmd.cmd_version = htobe32(0); | |
936 | ||
937 | memset(&rq, 0, sizeof(rq)); | |
938 | rq.session_id = htobe64(session_id); | |
939 | // TODO: add cmd line parameter to select seek beginning | |
940 | // rq.seek = htobe32(LTTNG_VIEWER_SEEK_BEGINNING); | |
941 | rq.seek = htobe32(LTTNG_VIEWER_SEEK_LAST); | |
942 | ||
943 | /* | |
944 | * Merge the cmd and connection request to prevent a write-write | |
945 | * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the | |
946 | * second write to be performed quickly in presence of Nagle's algorithm. | |
947 | */ | |
948 | memcpy(cmd_buf, &cmd, sizeof(cmd)); | |
949 | memcpy(cmd_buf + sizeof(cmd), &rq, sizeof(rq)); | |
950 | status = lttng_live_send(viewer_connection, &cmd_buf, cmd_buf_len); | |
951 | if (status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 952 | viewer_handle_send_status(status, "attach session command"); |
4164020e SM |
953 | goto end; |
954 | } | |
955 | ||
956 | status = lttng_live_recv(viewer_connection, &rp, sizeof(rp)); | |
957 | if (status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 958 | viewer_handle_recv_status(status, "attach session reply"); |
4164020e SM |
959 | goto end; |
960 | } | |
961 | ||
962 | streams_count = be32toh(rp.streams_count); | |
963 | switch (be32toh(rp.status)) { | |
964 | case LTTNG_VIEWER_ATTACH_OK: | |
965 | break; | |
966 | case LTTNG_VIEWER_ATTACH_UNK: | |
0f5c5d5c SM |
967 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Session id {} is unknown", |
968 | session_id); | |
4164020e SM |
969 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
970 | goto end; | |
971 | case LTTNG_VIEWER_ATTACH_ALREADY: | |
0f5c5d5c SM |
972 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
973 | "There is already a viewer attached to this session"); | |
4164020e SM |
974 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
975 | goto end; | |
976 | case LTTNG_VIEWER_ATTACH_NOT_LIVE: | |
0f5c5d5c | 977 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Not a live session"); |
4164020e SM |
978 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
979 | goto end; | |
980 | case LTTNG_VIEWER_ATTACH_SEEK_ERR: | |
0f5c5d5c | 981 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Wrong seek parameter"); |
4164020e SM |
982 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
983 | goto end; | |
984 | default: | |
0f5c5d5c SM |
985 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Unknown attach return code {}", |
986 | be32toh(rp.status)); | |
4164020e SM |
987 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
988 | goto end; | |
989 | } | |
990 | ||
991 | /* We receive the initial list of streams. */ | |
992 | status = receive_streams(session, streams_count, self_msg_iter); | |
993 | switch (status) { | |
994 | case LTTNG_LIVE_VIEWER_STATUS_OK: | |
995 | break; | |
996 | case LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED: | |
997 | goto end; | |
998 | case LTTNG_LIVE_VIEWER_STATUS_ERROR: | |
0f5c5d5c | 999 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Error receiving streams"); |
4164020e SM |
1000 | goto end; |
1001 | default: | |
1002 | bt_common_abort(); | |
1003 | } | |
1004 | ||
1005 | session->attached = true; | |
1006 | session->new_streams_needed = false; | |
7cdc2bab | 1007 | |
eee8e741 | 1008 | end: |
4164020e | 1009 | return status; |
7cdc2bab MD |
1010 | } |
1011 | ||
4164020e | 1012 | enum lttng_live_viewer_status lttng_live_session_detach(struct lttng_live_session *session) |
7cdc2bab | 1013 | { |
4164020e SM |
1014 | struct lttng_viewer_cmd cmd; |
1015 | enum lttng_live_viewer_status status; | |
1016 | struct lttng_viewer_detach_session_request rq; | |
1017 | struct lttng_viewer_detach_session_response rp; | |
1018 | struct lttng_live_msg_iter *lttng_live_msg_iter = session->lttng_live_msg_iter; | |
d721bef8 | 1019 | live_viewer_connection *viewer_connection = lttng_live_msg_iter->viewer_connection.get(); |
4164020e SM |
1020 | uint64_t session_id = session->id; |
1021 | const size_t cmd_buf_len = sizeof(cmd) + sizeof(rq); | |
1022 | char cmd_buf[cmd_buf_len]; | |
1023 | ||
1024 | /* | |
1025 | * The session might already be detached and the viewer socket might | |
1026 | * already been closed. This happens when calling this function when | |
1027 | * tearing down the graph after an error. | |
1028 | */ | |
1029 | if (!session->attached || viewer_connection->control_sock == BT_INVALID_SOCKET) { | |
1030 | return LTTNG_LIVE_VIEWER_STATUS_OK; | |
1031 | } | |
1032 | ||
0f5c5d5c SM |
1033 | BT_CPPLOGD_SPEC(viewer_connection->logger, "Detaching from session: cmd={}, session-id={}", |
1034 | LTTNG_VIEWER_DETACH_SESSION, session_id); | |
4164020e SM |
1035 | |
1036 | cmd.cmd = htobe32(LTTNG_VIEWER_DETACH_SESSION); | |
1037 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); | |
1038 | cmd.cmd_version = htobe32(0); | |
1039 | ||
1040 | memset(&rq, 0, sizeof(rq)); | |
1041 | rq.session_id = htobe64(session_id); | |
1042 | ||
1043 | /* | |
1044 | * Merge the cmd and connection request to prevent a write-write | |
1045 | * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the | |
1046 | * second write to be performed quickly in presence of Nagle's algorithm. | |
1047 | */ | |
1048 | memcpy(cmd_buf, &cmd, sizeof(cmd)); | |
1049 | memcpy(cmd_buf + sizeof(cmd), &rq, sizeof(rq)); | |
1050 | status = lttng_live_send(viewer_connection, &cmd_buf, cmd_buf_len); | |
1051 | if (status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 1052 | viewer_handle_send_status(status, "detach session command"); |
4164020e SM |
1053 | goto end; |
1054 | } | |
1055 | ||
1056 | status = lttng_live_recv(viewer_connection, &rp, sizeof(rp)); | |
1057 | if (status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 1058 | viewer_handle_recv_status(status, "detach session reply"); |
4164020e SM |
1059 | goto end; |
1060 | } | |
1061 | ||
1062 | switch (be32toh(rp.status)) { | |
1063 | case LTTNG_VIEWER_DETACH_SESSION_OK: | |
1064 | break; | |
1065 | case LTTNG_VIEWER_DETACH_SESSION_UNK: | |
0f5c5d5c | 1066 | BT_CPPLOGW_SPEC(viewer_connection->logger, "Session id {} is unknown", session_id); |
4164020e SM |
1067 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
1068 | goto end; | |
1069 | case LTTNG_VIEWER_DETACH_SESSION_ERR: | |
0f5c5d5c | 1070 | BT_CPPLOGW_SPEC(viewer_connection->logger, "Error detaching session id {}", session_id); |
4164020e SM |
1071 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
1072 | goto end; | |
1073 | default: | |
0f5c5d5c SM |
1074 | BT_CPPLOGE_SPEC(viewer_connection->logger, "Unknown detach return code {}", |
1075 | be32toh(rp.status)); | |
4164020e SM |
1076 | status = LTTNG_LIVE_VIEWER_STATUS_ERROR; |
1077 | goto end; | |
1078 | } | |
1079 | ||
1080 | session->attached = false; | |
1081 | ||
1082 | status = LTTNG_LIVE_VIEWER_STATUS_OK; | |
7cdc2bab | 1083 | |
f79c2d7a | 1084 | end: |
4164020e | 1085 | return status; |
7cdc2bab MD |
1086 | } |
1087 | ||
4164020e | 1088 | enum lttng_live_get_one_metadata_status |
15fcc425 | 1089 | lttng_live_get_one_metadata_packet(struct lttng_live_trace *trace, std::vector<char>& buf) |
7cdc2bab | 1090 | { |
4164020e SM |
1091 | uint64_t len = 0; |
1092 | enum lttng_live_get_one_metadata_status status; | |
1093 | enum lttng_live_viewer_status viewer_status; | |
1094 | struct lttng_viewer_cmd cmd; | |
1095 | struct lttng_viewer_get_metadata rq; | |
1096 | struct lttng_viewer_metadata_packet rp; | |
76edb16f | 1097 | std::vector<char> data; |
4164020e SM |
1098 | struct lttng_live_session *session = trace->session; |
1099 | struct lttng_live_msg_iter *lttng_live_msg_iter = session->lttng_live_msg_iter; | |
e66be7c3 | 1100 | struct lttng_live_metadata *metadata = trace->metadata.get(); |
d721bef8 | 1101 | live_viewer_connection *viewer_connection = lttng_live_msg_iter->viewer_connection.get(); |
4164020e SM |
1102 | const size_t cmd_buf_len = sizeof(cmd) + sizeof(rq); |
1103 | char cmd_buf[cmd_buf_len]; | |
1104 | ||
0f5c5d5c SM |
1105 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
1106 | "Requesting new metadata for trace:" | |
1107 | "cmd={}, trace-id={}, metadata-stream-id={}", | |
1108 | LTTNG_VIEWER_GET_METADATA, trace->id, metadata->stream_id); | |
4164020e SM |
1109 | |
1110 | rq.stream_id = htobe64(metadata->stream_id); | |
1111 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_METADATA); | |
1112 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); | |
1113 | cmd.cmd_version = htobe32(0); | |
1114 | ||
1115 | /* | |
1116 | * Merge the cmd and connection request to prevent a write-write | |
1117 | * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the | |
1118 | * second write to be performed quickly in presence of Nagle's algorithm. | |
1119 | */ | |
1120 | memcpy(cmd_buf, &cmd, sizeof(cmd)); | |
1121 | memcpy(cmd_buf + sizeof(cmd), &rq, sizeof(rq)); | |
1122 | viewer_status = lttng_live_send(viewer_connection, &cmd_buf, cmd_buf_len); | |
1123 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 1124 | viewer_handle_send_status(viewer_status, "get metadata command"); |
4164020e SM |
1125 | status = (enum lttng_live_get_one_metadata_status) viewer_status; |
1126 | goto end; | |
1127 | } | |
1128 | ||
1129 | viewer_status = lttng_live_recv(viewer_connection, &rp, sizeof(rp)); | |
1130 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 1131 | viewer_handle_recv_status(viewer_status, "get metadata reply"); |
4164020e SM |
1132 | status = (enum lttng_live_get_one_metadata_status) viewer_status; |
1133 | goto end; | |
1134 | } | |
1135 | ||
1136 | switch (be32toh(rp.status)) { | |
1137 | case LTTNG_VIEWER_METADATA_OK: | |
0f5c5d5c | 1138 | BT_CPPLOGD_SPEC(viewer_connection->logger, "Received get_metadata response: ok"); |
4164020e SM |
1139 | break; |
1140 | case LTTNG_VIEWER_NO_NEW_METADATA: | |
0f5c5d5c | 1141 | BT_CPPLOGD_SPEC(viewer_connection->logger, "Received get_metadata response: no new"); |
4164020e SM |
1142 | status = LTTNG_LIVE_GET_ONE_METADATA_STATUS_END; |
1143 | goto end; | |
1144 | case LTTNG_VIEWER_METADATA_ERR: | |
1145 | /* | |
1146 | * The Relayd cannot find this stream id. Maybe its | |
1147 | * gone already. This can happen in short lived UST app | |
1148 | * in a per-pid session. | |
1149 | */ | |
0f5c5d5c | 1150 | BT_CPPLOGD_SPEC(viewer_connection->logger, "Received get_metadata response: error"); |
4164020e SM |
1151 | status = LTTNG_LIVE_GET_ONE_METADATA_STATUS_CLOSED; |
1152 | goto end; | |
1153 | default: | |
0f5c5d5c SM |
1154 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
1155 | "Received get_metadata response: unknown"); | |
4164020e SM |
1156 | status = LTTNG_LIVE_GET_ONE_METADATA_STATUS_ERROR; |
1157 | goto end; | |
1158 | } | |
1159 | ||
1160 | len = be64toh(rp.len); | |
c5ce3927 FD |
1161 | if (len == 0) { |
1162 | /* | |
1163 | * We received a `LTTNG_VIEWER_METADATA_OK` with a packet | |
1164 | * length of 0. This means we must try again. This scenario | |
1165 | * arises when a clear command is performed on an lttng session. | |
1166 | */ | |
0f5c5d5c SM |
1167 | BT_CPPLOGD_SPEC( |
1168 | viewer_connection->logger, | |
c5ce3927 FD |
1169 | "Expecting a metadata packet of size 0. Retry to get a packet from the relay."); |
1170 | goto empty_metadata_packet_retry; | |
1171 | } | |
1172 | ||
0f5c5d5c | 1173 | BT_CPPLOGD_SPEC(viewer_connection->logger, "Writing {} bytes to metadata", len); |
4164020e | 1174 | if (len <= 0) { |
0f5c5d5c | 1175 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Erroneous response length"); |
4164020e SM |
1176 | status = LTTNG_LIVE_GET_ONE_METADATA_STATUS_ERROR; |
1177 | goto end; | |
1178 | } | |
1179 | ||
76edb16f | 1180 | data.resize(len); |
4164020e | 1181 | |
76edb16f | 1182 | viewer_status = lttng_live_recv(viewer_connection, data.data(), len); |
4164020e | 1183 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { |
0f5c5d5c | 1184 | viewer_handle_recv_status(viewer_status, "get metadata packet"); |
4164020e SM |
1185 | status = (enum lttng_live_get_one_metadata_status) viewer_status; |
1186 | goto end; | |
1187 | } | |
1188 | ||
1189 | /* | |
1190 | * Write the metadata to the file handle. | |
1191 | */ | |
76edb16f | 1192 | buf.insert(buf.end(), data.begin(), data.end()); |
4164020e | 1193 | |
c5ce3927 | 1194 | empty_metadata_packet_retry: |
4164020e | 1195 | status = LTTNG_LIVE_GET_ONE_METADATA_STATUS_OK; |
c28512ab | 1196 | |
c28512ab | 1197 | end: |
4164020e | 1198 | return status; |
7cdc2bab MD |
1199 | } |
1200 | ||
1201 | /* | |
1202 | * Assign the fields from a lttng_viewer_index to a packet_index. | |
1203 | */ | |
4164020e SM |
1204 | static void lttng_index_to_packet_index(struct lttng_viewer_index *lindex, |
1205 | struct packet_index *pindex) | |
7cdc2bab | 1206 | { |
4164020e SM |
1207 | BT_ASSERT(lindex); |
1208 | BT_ASSERT(pindex); | |
1209 | ||
1210 | pindex->offset = be64toh(lindex->offset); | |
1211 | pindex->packet_size = be64toh(lindex->packet_size); | |
1212 | pindex->content_size = be64toh(lindex->content_size); | |
1213 | pindex->ts_cycles.timestamp_begin = be64toh(lindex->timestamp_begin); | |
1214 | pindex->ts_cycles.timestamp_end = be64toh(lindex->timestamp_end); | |
1215 | pindex->events_discarded = be64toh(lindex->events_discarded); | |
7cdc2bab MD |
1216 | } |
1217 | ||
4164020e | 1218 | static void lttng_live_need_new_streams(struct lttng_live_msg_iter *lttng_live_msg_iter) |
36e94ad6 | 1219 | { |
751aaa62 | 1220 | for (const auto& session : lttng_live_msg_iter->sessions) { |
0f5c5d5c SM |
1221 | BT_CPPLOGD_SPEC(lttng_live_msg_iter->logger, |
1222 | "Marking session as needing new streams: " | |
1223 | "session-id={}", | |
1224 | session->id); | |
4164020e SM |
1225 | session->new_streams_needed = true; |
1226 | } | |
36e94ad6 FD |
1227 | } |
1228 | ||
4164020e SM |
1229 | enum lttng_live_iterator_status |
1230 | lttng_live_get_next_index(struct lttng_live_msg_iter *lttng_live_msg_iter, | |
1231 | struct lttng_live_stream_iterator *stream, struct packet_index *index) | |
7cdc2bab | 1232 | { |
4164020e SM |
1233 | struct lttng_viewer_cmd cmd; |
1234 | struct lttng_viewer_get_next_index rq; | |
1235 | enum lttng_live_viewer_status viewer_status; | |
1236 | struct lttng_viewer_index rp; | |
1237 | enum lttng_live_iterator_status status; | |
d721bef8 | 1238 | live_viewer_connection *viewer_connection = lttng_live_msg_iter->viewer_connection.get(); |
4164020e SM |
1239 | struct lttng_live_trace *trace = stream->trace; |
1240 | const size_t cmd_buf_len = sizeof(cmd) + sizeof(rq); | |
1241 | char cmd_buf[cmd_buf_len]; | |
1242 | uint32_t flags, rp_status; | |
1243 | ||
0f5c5d5c SM |
1244 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
1245 | "Requesting next index for stream: cmd={}, " | |
1246 | "viewer-stream-id={}", | |
1247 | LTTNG_VIEWER_GET_NEXT_INDEX, stream->viewer_stream_id); | |
4164020e SM |
1248 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_NEXT_INDEX); |
1249 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); | |
1250 | cmd.cmd_version = htobe32(0); | |
1251 | ||
1252 | memset(&rq, 0, sizeof(rq)); | |
1253 | rq.stream_id = htobe64(stream->viewer_stream_id); | |
1254 | ||
1255 | /* | |
1256 | * Merge the cmd and connection request to prevent a write-write | |
1257 | * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the | |
1258 | * second write to be performed quickly in presence of Nagle's algorithm. | |
1259 | */ | |
1260 | memcpy(cmd_buf, &cmd, sizeof(cmd)); | |
1261 | memcpy(cmd_buf + sizeof(cmd), &rq, sizeof(rq)); | |
1262 | ||
1263 | viewer_status = lttng_live_send(viewer_connection, &cmd_buf, cmd_buf_len); | |
1264 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 1265 | viewer_handle_send_status(viewer_status, "get next index command"); |
4164020e SM |
1266 | goto error; |
1267 | } | |
1268 | ||
1269 | viewer_status = lttng_live_recv(viewer_connection, &rp, sizeof(rp)); | |
1270 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 1271 | viewer_handle_recv_status(viewer_status, "get next index reply"); |
4164020e SM |
1272 | goto error; |
1273 | } | |
1274 | ||
1275 | flags = be32toh(rp.flags); | |
1276 | rp_status = be32toh(rp.status); | |
1277 | ||
0f5c5d5c SM |
1278 | BT_CPPLOGD_SPEC( |
1279 | viewer_connection->logger, "Received response from relay daemon: cmd=%s, response={}", | |
1280 | LTTNG_VIEWER_GET_NEXT_INDEX, static_cast<lttng_viewer_next_index_return_code>(rp_status)); | |
ca622546 JG |
1281 | |
1282 | if (flags & LTTNG_VIEWER_FLAG_NEW_STREAM) { | |
0f5c5d5c SM |
1283 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
1284 | "Marking all sessions as possibly needing new streams: " | |
1285 | "response={}, response-flag=NEW_STREAM", | |
1286 | static_cast<lttng_viewer_next_index_return_code>(rp_status)); | |
ca622546 JG |
1287 | lttng_live_need_new_streams(lttng_live_msg_iter); |
1288 | } | |
1289 | ||
4164020e SM |
1290 | switch (rp_status) { |
1291 | case LTTNG_VIEWER_INDEX_INACTIVE: | |
1292 | { | |
1293 | uint64_t ctf_stream_class_id; | |
1294 | ||
1295 | memset(index, 0, sizeof(struct packet_index)); | |
1296 | index->ts_cycles.timestamp_end = be64toh(rp.timestamp_end); | |
1297 | stream->current_inactivity_ts = index->ts_cycles.timestamp_end; | |
1298 | ctf_stream_class_id = be64toh(rp.stream_id); | |
1299 | if (stream->ctf_stream_class_id.is_set) { | |
1300 | BT_ASSERT(stream->ctf_stream_class_id.value == ctf_stream_class_id); | |
1301 | } else { | |
1302 | stream->ctf_stream_class_id.value = ctf_stream_class_id; | |
1303 | stream->ctf_stream_class_id.is_set = true; | |
1304 | } | |
1305 | lttng_live_stream_iterator_set_state(stream, LTTNG_LIVE_STREAM_QUIESCENT); | |
1306 | status = LTTNG_LIVE_ITERATOR_STATUS_OK; | |
1307 | break; | |
1308 | } | |
1309 | case LTTNG_VIEWER_INDEX_OK: | |
1310 | { | |
1311 | uint64_t ctf_stream_class_id; | |
1312 | ||
1313 | lttng_index_to_packet_index(&rp, index); | |
1314 | ctf_stream_class_id = be64toh(rp.stream_id); | |
1315 | if (stream->ctf_stream_class_id.is_set) { | |
1316 | BT_ASSERT(stream->ctf_stream_class_id.value == ctf_stream_class_id); | |
1317 | } else { | |
1318 | stream->ctf_stream_class_id.value = ctf_stream_class_id; | |
1319 | stream->ctf_stream_class_id.is_set = true; | |
1320 | } | |
4164020e SM |
1321 | lttng_live_stream_iterator_set_state(stream, LTTNG_LIVE_STREAM_ACTIVE_DATA); |
1322 | ||
1323 | if (flags & LTTNG_VIEWER_FLAG_NEW_METADATA) { | |
0f5c5d5c SM |
1324 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
1325 | "Marking trace as needing new metadata: " | |
1326 | "response={}, response-flag=NEW_METADATA, trace-id={}", | |
1327 | static_cast<lttng_viewer_next_index_return_code>(rp_status), trace->id); | |
4164020e SM |
1328 | trace->metadata_stream_state = LTTNG_LIVE_METADATA_STREAM_STATE_NEEDED; |
1329 | } | |
4164020e SM |
1330 | status = LTTNG_LIVE_ITERATOR_STATUS_OK; |
1331 | break; | |
1332 | } | |
1333 | case LTTNG_VIEWER_INDEX_RETRY: | |
1334 | memset(index, 0, sizeof(struct packet_index)); | |
1335 | lttng_live_stream_iterator_set_state(stream, LTTNG_LIVE_STREAM_ACTIVE_NO_DATA); | |
1336 | status = LTTNG_LIVE_ITERATOR_STATUS_AGAIN; | |
1337 | goto end; | |
1338 | case LTTNG_VIEWER_INDEX_HUP: | |
1339 | memset(index, 0, sizeof(struct packet_index)); | |
1340 | index->offset = EOF; | |
1341 | lttng_live_stream_iterator_set_state(stream, LTTNG_LIVE_STREAM_EOF); | |
1342 | stream->has_stream_hung_up = true; | |
1343 | status = LTTNG_LIVE_ITERATOR_STATUS_END; | |
1344 | break; | |
1345 | case LTTNG_VIEWER_INDEX_ERR: | |
1346 | memset(index, 0, sizeof(struct packet_index)); | |
1347 | lttng_live_stream_iterator_set_state(stream, LTTNG_LIVE_STREAM_ACTIVE_NO_DATA); | |
1348 | status = LTTNG_LIVE_ITERATOR_STATUS_ERROR; | |
1349 | goto end; | |
1350 | default: | |
0f5c5d5c SM |
1351 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
1352 | "Received get_next_index response: unknown value"); | |
4164020e SM |
1353 | memset(index, 0, sizeof(struct packet_index)); |
1354 | lttng_live_stream_iterator_set_state(stream, LTTNG_LIVE_STREAM_ACTIVE_NO_DATA); | |
1355 | status = LTTNG_LIVE_ITERATOR_STATUS_ERROR; | |
1356 | goto end; | |
1357 | } | |
ca622546 | 1358 | |
4164020e | 1359 | goto end; |
7cdc2bab MD |
1360 | |
1361 | error: | |
4164020e | 1362 | status = viewer_status_to_live_iterator_status(viewer_status); |
f79c2d7a | 1363 | end: |
4164020e | 1364 | return status; |
7cdc2bab MD |
1365 | } |
1366 | ||
4164020e SM |
1367 | enum ctf_msg_iter_medium_status |
1368 | lttng_live_get_stream_bytes(struct lttng_live_msg_iter *lttng_live_msg_iter, | |
1369 | struct lttng_live_stream_iterator *stream, uint8_t *buf, | |
1370 | uint64_t offset, uint64_t req_len, uint64_t *recv_len) | |
7cdc2bab | 1371 | { |
4164020e SM |
1372 | enum ctf_msg_iter_medium_status status; |
1373 | enum lttng_live_viewer_status viewer_status; | |
1374 | struct lttng_viewer_trace_packet rp; | |
1375 | struct lttng_viewer_cmd cmd; | |
1376 | struct lttng_viewer_get_packet rq; | |
d721bef8 | 1377 | live_viewer_connection *viewer_connection = lttng_live_msg_iter->viewer_connection.get(); |
4164020e SM |
1378 | struct lttng_live_trace *trace = stream->trace; |
1379 | const size_t cmd_buf_len = sizeof(cmd) + sizeof(rq); | |
1380 | char cmd_buf[cmd_buf_len]; | |
1381 | uint32_t flags, rp_status; | |
1382 | ||
0f5c5d5c SM |
1383 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
1384 | "Requesting data from stream: cmd={}, " | |
1385 | "offset={}, request-len={}", | |
1386 | LTTNG_VIEWER_GET_PACKET, offset, req_len); | |
4164020e SM |
1387 | |
1388 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_PACKET); | |
1389 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); | |
1390 | cmd.cmd_version = htobe32(0); | |
1391 | ||
1392 | memset(&rq, 0, sizeof(rq)); | |
1393 | rq.stream_id = htobe64(stream->viewer_stream_id); | |
1394 | rq.offset = htobe64(offset); | |
1395 | rq.len = htobe32(req_len); | |
1396 | ||
1397 | /* | |
1398 | * Merge the cmd and connection request to prevent a write-write | |
1399 | * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the | |
1400 | * second write to be performed quickly in presence of Nagle's algorithm. | |
1401 | */ | |
1402 | memcpy(cmd_buf, &cmd, sizeof(cmd)); | |
1403 | memcpy(cmd_buf + sizeof(cmd), &rq, sizeof(rq)); | |
1404 | ||
1405 | viewer_status = lttng_live_send(viewer_connection, &cmd_buf, cmd_buf_len); | |
1406 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 1407 | viewer_handle_send_status(viewer_status, "get data packet command"); |
4164020e SM |
1408 | goto error_convert_status; |
1409 | } | |
1410 | ||
1411 | viewer_status = lttng_live_recv(viewer_connection, &rp, sizeof(rp)); | |
1412 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 1413 | viewer_handle_recv_status(viewer_status, "get data packet reply"); |
4164020e SM |
1414 | goto error_convert_status; |
1415 | } | |
1416 | ||
1417 | flags = be32toh(rp.flags); | |
1418 | rp_status = be32toh(rp.status); | |
1419 | ||
0f5c5d5c SM |
1420 | BT_CPPLOGD_SPEC( |
1421 | viewer_connection->logger, "Received response from relay daemon: cmd={}, response={}", | |
1422 | LTTNG_VIEWER_GET_PACKET, static_cast<lttng_viewer_get_packet_return_code>(rp_status)); | |
4164020e SM |
1423 | switch (rp_status) { |
1424 | case LTTNG_VIEWER_GET_PACKET_OK: | |
1425 | req_len = be32toh(rp.len); | |
0f5c5d5c SM |
1426 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
1427 | "Got packet from relay daemon: response={}, packet-len={}", | |
1428 | static_cast<lttng_viewer_get_packet_return_code>(rp_status), req_len); | |
4164020e SM |
1429 | break; |
1430 | case LTTNG_VIEWER_GET_PACKET_RETRY: | |
1431 | /* Unimplemented by relay daemon */ | |
1432 | status = CTF_MSG_ITER_MEDIUM_STATUS_AGAIN; | |
1433 | goto end; | |
1434 | case LTTNG_VIEWER_GET_PACKET_ERR: | |
1435 | if (flags & LTTNG_VIEWER_FLAG_NEW_METADATA) { | |
0f5c5d5c SM |
1436 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
1437 | "Marking trace as needing new metadata: " | |
1438 | "response={}, response-flag=NEW_METADATA, trace-id={}", | |
1439 | static_cast<lttng_viewer_get_packet_return_code>(rp_status), trace->id); | |
4164020e SM |
1440 | trace->metadata_stream_state = LTTNG_LIVE_METADATA_STREAM_STATE_NEEDED; |
1441 | } | |
1442 | if (flags & LTTNG_VIEWER_FLAG_NEW_STREAM) { | |
0f5c5d5c SM |
1443 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
1444 | "Marking all sessions as possibly needing new streams: " | |
1445 | "response={}, response-flag=NEW_STREAM", | |
1446 | static_cast<lttng_viewer_get_packet_return_code>(rp_status)); | |
4164020e SM |
1447 | lttng_live_need_new_streams(lttng_live_msg_iter); |
1448 | } | |
1449 | if (flags & (LTTNG_VIEWER_FLAG_NEW_METADATA | LTTNG_VIEWER_FLAG_NEW_STREAM)) { | |
1450 | status = CTF_MSG_ITER_MEDIUM_STATUS_AGAIN; | |
0f5c5d5c SM |
1451 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
1452 | "Reply with any one flags set means we should retry: response={}", | |
1453 | static_cast<lttng_viewer_get_packet_return_code>(rp_status)); | |
4164020e SM |
1454 | goto end; |
1455 | } | |
0f5c5d5c SM |
1456 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
1457 | "Received get_data_packet response: error"); | |
4164020e SM |
1458 | status = CTF_MSG_ITER_MEDIUM_STATUS_ERROR; |
1459 | goto end; | |
1460 | case LTTNG_VIEWER_GET_PACKET_EOF: | |
1461 | status = CTF_MSG_ITER_MEDIUM_STATUS_EOF; | |
1462 | goto end; | |
1463 | default: | |
0f5c5d5c SM |
1464 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
1465 | "Received get_data_packet response: unknown ({})", rp_status); | |
4164020e SM |
1466 | status = CTF_MSG_ITER_MEDIUM_STATUS_ERROR; |
1467 | goto end; | |
1468 | } | |
1469 | ||
1470 | if (req_len == 0) { | |
1471 | status = CTF_MSG_ITER_MEDIUM_STATUS_ERROR; | |
1472 | goto end; | |
1473 | } | |
1474 | ||
1475 | viewer_status = lttng_live_recv(viewer_connection, buf, req_len); | |
1476 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 1477 | viewer_handle_recv_status(viewer_status, "get data packet"); |
4164020e SM |
1478 | goto error_convert_status; |
1479 | } | |
1480 | *recv_len = req_len; | |
1481 | ||
1482 | status = CTF_MSG_ITER_MEDIUM_STATUS_OK; | |
1483 | goto end; | |
f79c2d7a | 1484 | |
535fb48a | 1485 | error_convert_status: |
4164020e | 1486 | status = viewer_status_to_ctf_msg_iter_medium_status(viewer_status); |
f79c2d7a | 1487 | end: |
4164020e | 1488 | return status; |
7cdc2bab MD |
1489 | } |
1490 | ||
1491 | /* | |
1492 | * Request new streams for a session. | |
1493 | */ | |
4164020e SM |
1494 | enum lttng_live_iterator_status |
1495 | lttng_live_session_get_new_streams(struct lttng_live_session *session, | |
1496 | bt_self_message_iterator *self_msg_iter) | |
7cdc2bab | 1497 | { |
4164020e SM |
1498 | enum lttng_live_iterator_status status = LTTNG_LIVE_ITERATOR_STATUS_OK; |
1499 | struct lttng_viewer_cmd cmd; | |
1500 | struct lttng_viewer_new_streams_request rq; | |
1501 | struct lttng_viewer_new_streams_response rp; | |
1502 | struct lttng_live_msg_iter *lttng_live_msg_iter = session->lttng_live_msg_iter; | |
1503 | enum lttng_live_viewer_status viewer_status; | |
d721bef8 | 1504 | live_viewer_connection *viewer_connection = lttng_live_msg_iter->viewer_connection.get(); |
4164020e SM |
1505 | uint32_t streams_count; |
1506 | const size_t cmd_buf_len = sizeof(cmd) + sizeof(rq); | |
1507 | char cmd_buf[cmd_buf_len]; | |
1508 | ||
1509 | if (!session->new_streams_needed) { | |
1510 | status = LTTNG_LIVE_ITERATOR_STATUS_OK; | |
1511 | goto end; | |
1512 | } | |
1513 | ||
0f5c5d5c SM |
1514 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
1515 | "Requesting new streams for session: cmd={}, session-id={}", | |
1516 | LTTNG_VIEWER_GET_NEW_STREAMS, session->id); | |
4164020e SM |
1517 | |
1518 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_NEW_STREAMS); | |
1519 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); | |
1520 | cmd.cmd_version = htobe32(0); | |
1521 | ||
1522 | memset(&rq, 0, sizeof(rq)); | |
1523 | rq.session_id = htobe64(session->id); | |
1524 | ||
1525 | /* | |
1526 | * Merge the cmd and connection request to prevent a write-write | |
1527 | * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the | |
1528 | * second write to be performed quickly in presence of Nagle's algorithm. | |
1529 | */ | |
1530 | memcpy(cmd_buf, &cmd, sizeof(cmd)); | |
1531 | memcpy(cmd_buf + sizeof(cmd), &rq, sizeof(rq)); | |
1532 | ||
1533 | viewer_status = lttng_live_send(viewer_connection, &cmd_buf, cmd_buf_len); | |
1534 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 1535 | viewer_handle_send_status(viewer_status, "get new streams command"); |
4164020e SM |
1536 | status = viewer_status_to_live_iterator_status(viewer_status); |
1537 | goto end; | |
1538 | } | |
1539 | ||
1540 | viewer_status = lttng_live_recv(viewer_connection, &rp, sizeof(rp)); | |
1541 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 1542 | viewer_handle_recv_status(viewer_status, "get new streams reply"); |
4164020e SM |
1543 | status = viewer_status_to_live_iterator_status(viewer_status); |
1544 | goto end; | |
1545 | } | |
1546 | ||
1547 | streams_count = be32toh(rp.streams_count); | |
1548 | ||
1549 | switch (be32toh(rp.status)) { | |
1550 | case LTTNG_VIEWER_NEW_STREAMS_OK: | |
1551 | session->new_streams_needed = false; | |
1552 | break; | |
1553 | case LTTNG_VIEWER_NEW_STREAMS_NO_NEW: | |
1554 | session->new_streams_needed = false; | |
1555 | goto end; | |
1556 | case LTTNG_VIEWER_NEW_STREAMS_HUP: | |
1557 | session->new_streams_needed = false; | |
1558 | session->closed = true; | |
1559 | status = LTTNG_LIVE_ITERATOR_STATUS_END; | |
1560 | goto end; | |
1561 | case LTTNG_VIEWER_NEW_STREAMS_ERR: | |
0f5c5d5c | 1562 | BT_CPPLOGD_SPEC(viewer_connection->logger, "Received get_new_streams response: error"); |
4164020e SM |
1563 | status = LTTNG_LIVE_ITERATOR_STATUS_ERROR; |
1564 | goto end; | |
1565 | default: | |
0f5c5d5c SM |
1566 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
1567 | "Received get_new_streams response: Unknown:" | |
1568 | "return code {}", | |
1569 | be32toh(rp.status)); | |
4164020e SM |
1570 | status = LTTNG_LIVE_ITERATOR_STATUS_ERROR; |
1571 | goto end; | |
1572 | } | |
1573 | ||
1574 | viewer_status = receive_streams(session, streams_count, self_msg_iter); | |
1575 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 1576 | viewer_handle_recv_status(viewer_status, "new streams"); |
4164020e SM |
1577 | status = viewer_status_to_live_iterator_status(viewer_status); |
1578 | goto end; | |
1579 | } | |
1580 | ||
1581 | status = LTTNG_LIVE_ITERATOR_STATUS_OK; | |
f79c2d7a | 1582 | end: |
4164020e | 1583 | return status; |
7cdc2bab MD |
1584 | } |
1585 | ||
d721bef8 SM |
1586 | enum lttng_live_viewer_status |
1587 | live_viewer_connection_create(const char *url, bool in_query, | |
1588 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
1589 | const bt2c::Logger& parentLogger, live_viewer_connection::UP& viewer) | |
7cdc2bab | 1590 | { |
d721bef8 | 1591 | auto viewer_connection = bt2s::make_unique<live_viewer_connection>(parentLogger); |
4164020e | 1592 | |
0f5c5d5c SM |
1593 | if (bt_socket_init(viewer_connection->logger) != 0) { |
1594 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Failed to init socket"); | |
d721bef8 | 1595 | return LTTNG_LIVE_VIEWER_STATUS_ERROR; |
4164020e SM |
1596 | } |
1597 | ||
4164020e SM |
1598 | viewer_connection->control_sock = BT_INVALID_SOCKET; |
1599 | viewer_connection->port = -1; | |
1600 | viewer_connection->in_query = in_query; | |
1601 | viewer_connection->lttng_live_msg_iter = lttng_live_msg_iter; | |
30d81897 | 1602 | viewer_connection->url = url; |
4164020e | 1603 | |
0f5c5d5c | 1604 | BT_CPPLOGD_SPEC(viewer_connection->logger, "Establishing connection to url \"{}\"...", url); |
d721bef8 SM |
1605 | const auto status = lttng_live_connect_viewer(viewer_connection.get()); |
1606 | ||
4164020e SM |
1607 | /* |
1608 | * Only print error and append cause in case of error. not in case of | |
1609 | * interruption. | |
1610 | */ | |
1611 | if (status == LTTNG_LIVE_VIEWER_STATUS_ERROR) { | |
0f5c5d5c SM |
1612 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
1613 | "Failed to establish connection: " | |
1614 | "url=\"{}\"", | |
1615 | url); | |
d721bef8 | 1616 | return status; |
4164020e | 1617 | } else if (status == LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED) { |
d721bef8 | 1618 | return status; |
4164020e | 1619 | } |
0f5c5d5c | 1620 | BT_CPPLOGD_SPEC(viewer_connection->logger, "Connection to url \"{}\" is established", url); |
4164020e | 1621 | |
d721bef8 SM |
1622 | viewer = std::move(viewer_connection); |
1623 | return LTTNG_LIVE_VIEWER_STATUS_OK; | |
7cdc2bab MD |
1624 | } |
1625 | ||
277bcb7f | 1626 | live_viewer_connection::~live_viewer_connection() |
7cdc2bab | 1627 | { |
277bcb7f | 1628 | BT_CPPLOGD_SPEC(this->logger, "Closing connection to relay: relay-url=\"{}\"", this->url); |
b9e6ec43 | 1629 | |
277bcb7f | 1630 | lttng_live_disconnect_viewer(this); |
1cb3cdd7 | 1631 | |
4164020e | 1632 | bt_socket_fini(); |
7cdc2bab | 1633 | } |