Commit | Line | Data |
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7cdc2bab | 1 | /* |
0235b0db | 2 | * SPDX-License-Identifier: MIT |
7cdc2bab | 3 | * |
0235b0db MJ |
4 | * Copyright 2019 Francis Deslauriers <francis.deslauriers@efficios.com> |
5 | * Copyright 2016 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
7cdc2bab MD |
6 | */ |
7 | ||
c802cacb | 8 | #include <glib.h> |
7cdc2bab | 9 | #include <stdint.h> |
3c22a242 | 10 | #include <stdio.h> |
3c22a242 | 11 | |
c802cacb SM |
12 | #include <babeltrace2/babeltrace.h> |
13 | ||
578e048b | 14 | #include "common/common.h" |
83ad336c | 15 | #include "compat/endian.h" /* IWYU pragma: keep */ |
d721bef8 | 16 | #include "cpp-common/bt2s/make-unique.hpp" |
7cdc2bab | 17 | |
c802cacb | 18 | #include "data-stream.hpp" |
087cd0f5 | 19 | #include "lttng-live.hpp" |
087cd0f5 | 20 | #include "lttng-viewer-abi.hpp" |
087cd0f5 | 21 | #include "metadata.hpp" |
c802cacb | 22 | #include "viewer-connection.hpp" |
7cdc2bab | 23 | |
0f5c5d5c | 24 | #define viewer_handle_send_recv_status(_status, _action, _msg_str) \ |
4164020e SM |
25 | do { \ |
26 | switch (_status) { \ | |
27 | case LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED: \ | |
28 | break; \ | |
29 | case LTTNG_LIVE_VIEWER_STATUS_ERROR: \ | |
0f5c5d5c SM |
30 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, \ |
31 | "Error " _action " " _msg_str); \ | |
4164020e SM |
32 | break; \ |
33 | default: \ | |
34 | bt_common_abort(); \ | |
35 | } \ | |
36 | } while (0) | |
37 | ||
0f5c5d5c SM |
38 | #define viewer_handle_send_status(_status, _msg_str) \ |
39 | viewer_handle_send_recv_status(_status, "sending", _msg_str) | |
4164020e | 40 | |
0f5c5d5c SM |
41 | #define viewer_handle_recv_status(_status, _msg_str) \ |
42 | viewer_handle_send_recv_status(_status, "receiving", _msg_str) | |
4164020e | 43 | |
0f5c5d5c | 44 | #define LTTNG_LIVE_CPPLOGE_APPEND_CAUSE_ERRNO(_msg, _fmt, ...) \ |
4164020e | 45 | do { \ |
0f5c5d5c SM |
46 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, _msg ": {}" _fmt, \ |
47 | bt_socket_errormsg(), ##__VA_ARGS__); \ | |
4164020e SM |
48 | } while (0) |
49 | ||
4164020e SM |
50 | static inline enum lttng_live_iterator_status |
51 | viewer_status_to_live_iterator_status(enum lttng_live_viewer_status viewer_status) | |
f79c2d7a | 52 | { |
4164020e SM |
53 | switch (viewer_status) { |
54 | case LTTNG_LIVE_VIEWER_STATUS_OK: | |
55 | return LTTNG_LIVE_ITERATOR_STATUS_OK; | |
56 | case LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED: | |
57 | return LTTNG_LIVE_ITERATOR_STATUS_AGAIN; | |
58 | case LTTNG_LIVE_VIEWER_STATUS_ERROR: | |
59 | return LTTNG_LIVE_ITERATOR_STATUS_ERROR; | |
60 | } | |
61 | ||
62 | bt_common_abort(); | |
f79c2d7a FD |
63 | } |
64 | ||
4164020e SM |
65 | static inline enum ctf_msg_iter_medium_status |
66 | viewer_status_to_ctf_msg_iter_medium_status(enum lttng_live_viewer_status viewer_status) | |
f79c2d7a | 67 | { |
4164020e SM |
68 | switch (viewer_status) { |
69 | case LTTNG_LIVE_VIEWER_STATUS_OK: | |
70 | return CTF_MSG_ITER_MEDIUM_STATUS_OK; | |
71 | case LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED: | |
72 | return CTF_MSG_ITER_MEDIUM_STATUS_AGAIN; | |
73 | case LTTNG_LIVE_VIEWER_STATUS_ERROR: | |
74 | return CTF_MSG_ITER_MEDIUM_STATUS_ERROR; | |
75 | } | |
76 | ||
77 | bt_common_abort(); | |
f79c2d7a FD |
78 | } |
79 | ||
4164020e | 80 | static inline void viewer_connection_close_socket(struct live_viewer_connection *viewer_connection) |
b197ca37 | 81 | { |
e5694f0e SM |
82 | if (viewer_connection->control_sock == BT_INVALID_SOCKET) { |
83 | return; | |
84 | } | |
85 | ||
4164020e SM |
86 | int ret = bt_socket_close(viewer_connection->control_sock); |
87 | if (ret == -1) { | |
0f5c5d5c SM |
88 | BT_CPPLOGW_ERRNO_SPEC(viewer_connection->logger, |
89 | "Error closing viewer connection socket: ", "."); | |
4164020e SM |
90 | } |
91 | ||
92 | viewer_connection->control_sock = BT_INVALID_SOCKET; | |
b197ca37 FD |
93 | } |
94 | ||
f79c2d7a FD |
95 | /* |
96 | * This function receives a message from the Relay daemon. | |
97 | * If it received the entire message, it returns _OK, | |
98 | * If it's interrupted, it returns _INTERRUPTED, | |
99 | * otherwise, it returns _ERROR. | |
100 | */ | |
4164020e SM |
101 | static enum lttng_live_viewer_status |
102 | lttng_live_recv(struct live_viewer_connection *viewer_connection, void *buf, size_t len) | |
7cdc2bab | 103 | { |
4164020e | 104 | ssize_t received; |
4164020e SM |
105 | size_t total_received = 0, to_receive = len; |
106 | struct lttng_live_msg_iter *lttng_live_msg_iter = viewer_connection->lttng_live_msg_iter; | |
4164020e SM |
107 | BT_SOCKET sock = viewer_connection->control_sock; |
108 | ||
109 | /* | |
110 | * Receive a message from the Relay. | |
111 | */ | |
112 | do { | |
113 | received = bt_socket_recv(sock, (char *) buf + total_received, to_receive, 0); | |
114 | if (received == BT_SOCKET_ERROR) { | |
115 | if (bt_socket_interrupted()) { | |
116 | if (lttng_live_graph_is_canceled(lttng_live_msg_iter)) { | |
117 | /* | |
118 | * This interruption was due to a | |
119 | * SIGINT and the graph is being torn | |
120 | * down. | |
121 | */ | |
4164020e | 122 | lttng_live_msg_iter->was_interrupted = true; |
a97176ef | 123 | return LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED; |
4164020e SM |
124 | } else { |
125 | /* | |
126 | * A signal was received, but the graph | |
127 | * is not being torn down. Carry on. | |
128 | */ | |
129 | continue; | |
130 | } | |
131 | } else { | |
132 | /* | |
133 | * For any other types of socket error, close | |
134 | * the socket and return an error. | |
135 | */ | |
0f5c5d5c | 136 | LTTNG_LIVE_CPPLOGE_APPEND_CAUSE_ERRNO("Error receiving from Relay", "."); |
4164020e SM |
137 | |
138 | viewer_connection_close_socket(viewer_connection); | |
a97176ef | 139 | return LTTNG_LIVE_VIEWER_STATUS_ERROR; |
4164020e SM |
140 | } |
141 | } else if (received == 0) { | |
142 | /* | |
143 | * The recv() call returned 0. This means the | |
144 | * connection was orderly shutdown from the other peer. | |
145 | * If that happens when we are trying to receive | |
146 | * a message from it, it means something when wrong. | |
147 | * Close the socket and return an error. | |
148 | */ | |
0f5c5d5c SM |
149 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
150 | "Remote side has closed connection"); | |
4164020e | 151 | viewer_connection_close_socket(viewer_connection); |
a97176ef | 152 | return LTTNG_LIVE_VIEWER_STATUS_ERROR; |
4164020e SM |
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); | |
a97176ef | 162 | return LTTNG_LIVE_VIEWER_STATUS_OK; |
7cdc2bab MD |
163 | } |
164 | ||
f79c2d7a FD |
165 | /* |
166 | * This function sends a message to the Relay daemon. | |
167 | * If it send the message, it returns _OK, | |
168 | * If it's interrupted, it returns _INTERRUPTED, | |
169 | * otherwise, it returns _ERROR. | |
170 | */ | |
4164020e SM |
171 | static enum lttng_live_viewer_status |
172 | lttng_live_send(struct live_viewer_connection *viewer_connection, const void *buf, size_t len) | |
7cdc2bab | 173 | { |
4164020e SM |
174 | struct lttng_live_msg_iter *lttng_live_msg_iter = viewer_connection->lttng_live_msg_iter; |
175 | BT_SOCKET sock = viewer_connection->control_sock; | |
176 | size_t to_send = len; | |
177 | ssize_t total_sent = 0; | |
178 | ||
179 | do { | |
180 | ssize_t sent = bt_socket_send_nosigpipe(sock, (char *) buf + total_sent, to_send); | |
181 | if (sent == BT_SOCKET_ERROR) { | |
182 | if (bt_socket_interrupted()) { | |
183 | if (lttng_live_graph_is_canceled(lttng_live_msg_iter)) { | |
184 | /* | |
185 | * This interruption was a SIGINT and | |
186 | * the graph is being teared down. | |
187 | */ | |
4164020e | 188 | lttng_live_msg_iter->was_interrupted = true; |
a97176ef | 189 | return LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED; |
4164020e SM |
190 | } else { |
191 | /* | |
192 | * A signal was received, but the graph | |
193 | * is not being teared down. Carry on. | |
194 | */ | |
195 | continue; | |
196 | } | |
197 | } else { | |
198 | /* | |
199 | * For any other types of socket error, close | |
200 | * the socket and return an error. | |
201 | */ | |
0f5c5d5c | 202 | LTTNG_LIVE_CPPLOGE_APPEND_CAUSE_ERRNO("Error sending to Relay", "."); |
4164020e SM |
203 | |
204 | viewer_connection_close_socket(viewer_connection); | |
a97176ef | 205 | return LTTNG_LIVE_VIEWER_STATUS_ERROR; |
4164020e SM |
206 | } |
207 | } | |
208 | ||
209 | BT_ASSERT(sent <= to_send); | |
210 | total_sent += sent; | |
211 | to_send -= sent; | |
212 | ||
213 | } while (to_send > 0); | |
214 | ||
215 | BT_ASSERT(total_sent == len); | |
a97176ef | 216 | return LTTNG_LIVE_VIEWER_STATUS_OK; |
7cdc2bab MD |
217 | } |
218 | ||
4164020e | 219 | static int parse_url(struct live_viewer_connection *viewer_connection) |
7cdc2bab | 220 | { |
4164020e | 221 | char error_buf[256] = {0}; |
dd420a9b | 222 | struct bt_common_lttng_live_url_parts lttng_live_url_parts = {}; |
9d0b798a | 223 | bt_common_lttng_live_url_parts_deleter partsDeleter {lttng_live_url_parts}; |
4164020e | 224 | |
30d81897 | 225 | if (viewer_connection->url.empty()) { |
a97176ef | 226 | return -1; |
4164020e SM |
227 | } |
228 | ||
30d81897 SM |
229 | lttng_live_url_parts = bt_common_parse_lttng_live_url(viewer_connection->url.c_str(), error_buf, |
230 | sizeof(error_buf)); | |
4164020e | 231 | if (!lttng_live_url_parts.proto) { |
0f5c5d5c SM |
232 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Invalid LTTng live URL format: {}", |
233 | error_buf); | |
a97176ef | 234 | return -1; |
4164020e | 235 | } |
198e7911 | 236 | viewer_connection->proto.reset(lttng_live_url_parts.proto); |
4164020e SM |
237 | lttng_live_url_parts.proto = NULL; |
238 | ||
198e7911 | 239 | viewer_connection->relay_hostname.reset(lttng_live_url_parts.hostname); |
4164020e SM |
240 | lttng_live_url_parts.hostname = NULL; |
241 | ||
242 | if (lttng_live_url_parts.port >= 0) { | |
243 | viewer_connection->port = lttng_live_url_parts.port; | |
244 | } else { | |
245 | viewer_connection->port = LTTNG_DEFAULT_NETWORK_VIEWER_PORT; | |
246 | } | |
247 | ||
198e7911 | 248 | viewer_connection->target_hostname.reset(lttng_live_url_parts.target_hostname); |
4164020e SM |
249 | lttng_live_url_parts.target_hostname = NULL; |
250 | ||
251 | if (lttng_live_url_parts.session_name) { | |
198e7911 | 252 | viewer_connection->session_name.reset(lttng_live_url_parts.session_name); |
4164020e SM |
253 | lttng_live_url_parts.session_name = NULL; |
254 | } | |
255 | ||
a97176ef | 256 | return 0; |
7cdc2bab MD |
257 | } |
258 | ||
4164020e SM |
259 | static enum lttng_live_viewer_status |
260 | lttng_live_handshake(struct live_viewer_connection *viewer_connection) | |
7cdc2bab | 261 | { |
4164020e SM |
262 | struct lttng_viewer_cmd cmd; |
263 | struct lttng_viewer_connect connect; | |
264 | enum lttng_live_viewer_status status; | |
4164020e SM |
265 | const size_t cmd_buf_len = sizeof(cmd) + sizeof(connect); |
266 | char cmd_buf[cmd_buf_len]; | |
267 | ||
0f5c5d5c SM |
268 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
269 | "Handshaking with the relay daemon: cmd={}, major-version={}, minor-version={}", | |
270 | LTTNG_VIEWER_CONNECT, LTTNG_LIVE_MAJOR, LTTNG_LIVE_MINOR); | |
4164020e SM |
271 | |
272 | cmd.cmd = htobe32(LTTNG_VIEWER_CONNECT); | |
273 | cmd.data_size = htobe64((uint64_t) sizeof(connect)); | |
274 | cmd.cmd_version = htobe32(0); | |
275 | ||
276 | connect.viewer_session_id = -1ULL; /* will be set on recv */ | |
277 | connect.major = htobe32(LTTNG_LIVE_MAJOR); | |
278 | connect.minor = htobe32(LTTNG_LIVE_MINOR); | |
279 | connect.type = htobe32(LTTNG_VIEWER_CLIENT_COMMAND); | |
280 | ||
281 | /* | |
282 | * Merge the cmd and connection request to prevent a write-write | |
283 | * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the | |
284 | * second write to be performed quickly in presence of Nagle's algorithm | |
285 | */ | |
286 | memcpy(cmd_buf, &cmd, sizeof(cmd)); | |
287 | memcpy(cmd_buf + sizeof(cmd), &connect, sizeof(connect)); | |
288 | ||
289 | status = lttng_live_send(viewer_connection, &cmd_buf, cmd_buf_len); | |
290 | if (status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 291 | viewer_handle_send_status(status, "viewer connect command"); |
a97176ef | 292 | return status; |
4164020e SM |
293 | } |
294 | ||
295 | status = lttng_live_recv(viewer_connection, &connect, sizeof(connect)); | |
296 | if (status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 297 | viewer_handle_recv_status(status, "viewer connect reply"); |
a97176ef | 298 | return status; |
4164020e SM |
299 | } |
300 | ||
0f5c5d5c SM |
301 | BT_CPPLOGI_SPEC(viewer_connection->logger, "Received viewer session ID : {}", |
302 | (uint64_t) be64toh(connect.viewer_session_id)); | |
303 | BT_CPPLOGI_SPEC(viewer_connection->logger, "Relayd version : {}.{}", be32toh(connect.major), | |
304 | be32toh(connect.minor)); | |
4164020e SM |
305 | |
306 | if (LTTNG_LIVE_MAJOR != be32toh(connect.major)) { | |
0f5c5d5c SM |
307 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
308 | "Incompatible lttng-relayd protocol"); | |
a97176ef | 309 | return LTTNG_LIVE_VIEWER_STATUS_ERROR; |
4164020e SM |
310 | } |
311 | /* Use the smallest protocol version implemented. */ | |
312 | if (LTTNG_LIVE_MINOR > be32toh(connect.minor)) { | |
313 | viewer_connection->minor = be32toh(connect.minor); | |
314 | } else { | |
315 | viewer_connection->minor = LTTNG_LIVE_MINOR; | |
316 | } | |
317 | viewer_connection->major = LTTNG_LIVE_MAJOR; | |
318 | ||
a97176ef | 319 | return LTTNG_LIVE_VIEWER_STATUS_OK; |
7cdc2bab MD |
320 | } |
321 | ||
4164020e SM |
322 | static enum lttng_live_viewer_status |
323 | lttng_live_connect_viewer(struct live_viewer_connection *viewer_connection) | |
7cdc2bab | 324 | { |
4164020e SM |
325 | struct hostent *host; |
326 | struct sockaddr_in server_addr; | |
327 | enum lttng_live_viewer_status status; | |
4164020e SM |
328 | |
329 | if (parse_url(viewer_connection)) { | |
0f5c5d5c | 330 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Failed to parse URL"); |
a97176ef | 331 | return LTTNG_LIVE_VIEWER_STATUS_ERROR; |
4164020e SM |
332 | } |
333 | ||
0f5c5d5c SM |
334 | BT_CPPLOGD_SPEC( |
335 | viewer_connection->logger, | |
336 | "Connecting to hostname : {}, port : {}, target hostname : {}, session name : {}, proto : {}", | |
4164020e SM |
337 | viewer_connection->relay_hostname->str, viewer_connection->port, |
338 | !viewer_connection->target_hostname ? "<none>" : viewer_connection->target_hostname->str, | |
339 | !viewer_connection->session_name ? "<none>" : viewer_connection->session_name->str, | |
340 | viewer_connection->proto->str); | |
341 | ||
342 | host = gethostbyname(viewer_connection->relay_hostname->str); | |
343 | if (!host) { | |
0f5c5d5c SM |
344 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
345 | "Cannot lookup hostname: hostname=\"{}\"", | |
346 | viewer_connection->relay_hostname->str); | |
a97176ef | 347 | return LTTNG_LIVE_VIEWER_STATUS_ERROR; |
4164020e SM |
348 | } |
349 | ||
350 | if ((viewer_connection->control_sock = socket(AF_INET, SOCK_STREAM, 0)) == BT_INVALID_SOCKET) { | |
0f5c5d5c SM |
351 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Socket creation failed: {}", |
352 | bt_socket_errormsg()); | |
a97176ef | 353 | return LTTNG_LIVE_VIEWER_STATUS_ERROR; |
4164020e SM |
354 | } |
355 | ||
356 | server_addr.sin_family = AF_INET; | |
357 | server_addr.sin_port = htons(viewer_connection->port); | |
358 | server_addr.sin_addr = *((struct in_addr *) host->h_addr); | |
359 | memset(&(server_addr.sin_zero), 0, 8); | |
360 | ||
361 | if (connect(viewer_connection->control_sock, (struct sockaddr *) &server_addr, | |
362 | sizeof(struct sockaddr)) == BT_SOCKET_ERROR) { | |
0f5c5d5c SM |
363 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Connection failed: {}", |
364 | bt_socket_errormsg()); | |
a97176ef SM |
365 | viewer_connection_close_socket(viewer_connection); |
366 | return LTTNG_LIVE_VIEWER_STATUS_ERROR; | |
4164020e SM |
367 | } |
368 | ||
369 | status = lttng_live_handshake(viewer_connection); | |
370 | ||
371 | /* | |
372 | * Only print error and append cause in case of error. not in case of | |
373 | * interruption. | |
374 | */ | |
375 | if (status == LTTNG_LIVE_VIEWER_STATUS_ERROR) { | |
0f5c5d5c | 376 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Viewer handshake failed"); |
a97176ef SM |
377 | viewer_connection_close_socket(viewer_connection); |
378 | return LTTNG_LIVE_VIEWER_STATUS_ERROR; | |
4164020e | 379 | } else if (status == LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED) { |
a97176ef | 380 | return LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED; |
4164020e SM |
381 | } |
382 | ||
a97176ef | 383 | return LTTNG_LIVE_VIEWER_STATUS_OK; |
7cdc2bab MD |
384 | } |
385 | ||
bf35aaef SM |
386 | static int list_update_session(const bt2::ArrayValue results, |
387 | const struct lttng_viewer_session *session, bool *_found, | |
388 | struct live_viewer_connection *viewer_connection) | |
7cdc2bab | 389 | { |
4164020e SM |
390 | bool found = false; |
391 | ||
bf35aaef SM |
392 | for (const auto value : results) { |
393 | const auto map = value.asMap(); | |
394 | const auto hostnameVal = map["target-hostname"]; | |
4164020e | 395 | |
bf35aaef | 396 | if (!hostnameVal) { |
0f5c5d5c SM |
397 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
398 | "Error borrowing \"target-hostname\" entry."); | |
bf35aaef | 399 | return -1; |
4164020e | 400 | } |
bf35aaef SM |
401 | |
402 | const auto sessionNameVal = map["session-name"]; | |
403 | ||
404 | if (!sessionNameVal) { | |
0f5c5d5c SM |
405 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
406 | "Error borrowing \"session-name\" entry."); | |
bf35aaef | 407 | return -1; |
4164020e | 408 | } |
bf35aaef SM |
409 | |
410 | const auto hostname_str = hostnameVal->asString().value(); | |
411 | const auto session_name_str = sessionNameVal->asString().value(); | |
4164020e SM |
412 | |
413 | if (strcmp(session->hostname, hostname_str) == 0 && | |
414 | strcmp(session->session_name, session_name_str) == 0) { | |
4164020e SM |
415 | uint32_t streams = be32toh(session->streams); |
416 | uint32_t clients = be32toh(session->clients); | |
417 | ||
418 | found = true; | |
419 | ||
bf35aaef SM |
420 | const auto streamCountVal = map["stream-count"]; |
421 | ||
422 | if (!streamCountVal) { | |
0f5c5d5c SM |
423 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
424 | "Error borrowing \"stream-count\" entry."); | |
bf35aaef | 425 | return -1; |
4164020e | 426 | } |
bf35aaef SM |
427 | |
428 | auto val = streamCountVal->asUnsignedInteger().value(); | |
429 | ||
4164020e SM |
430 | /* sum */ |
431 | val += streams; | |
bf35aaef | 432 | streamCountVal->asUnsignedInteger().value(val); |
4164020e | 433 | |
bf35aaef SM |
434 | const auto clientCountVal = map["client-count"]; |
435 | ||
436 | if (!clientCountVal) { | |
0f5c5d5c SM |
437 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
438 | "Error borrowing \"client-count\" entry."); | |
bf35aaef | 439 | return -1; |
4164020e | 440 | } |
bf35aaef SM |
441 | |
442 | val = clientCountVal->asUnsignedInteger().value(); | |
443 | ||
4164020e | 444 | /* max */ |
bf35aaef SM |
445 | val = std::max<uint64_t>(clients, val); |
446 | clientCountVal->asUnsignedInteger().value(val); | |
4164020e SM |
447 | } |
448 | ||
449 | if (found) { | |
450 | break; | |
451 | } | |
452 | } | |
bf35aaef | 453 | |
4164020e | 454 | *_found = found; |
bf35aaef | 455 | return 0; |
7cdc2bab MD |
456 | } |
457 | ||
bf35aaef | 458 | static int list_append_session(const bt2::ArrayValue results, const std::string& base_url, |
4164020e SM |
459 | const struct lttng_viewer_session *session, |
460 | struct live_viewer_connection *viewer_connection) | |
7cdc2bab | 461 | { |
4164020e | 462 | int ret = 0; |
4164020e SM |
463 | bool found = false; |
464 | ||
465 | /* | |
466 | * If the session already exists, add the stream count to it, | |
467 | * and do max of client counts. | |
468 | */ | |
469 | ret = list_update_session(results, session, &found, viewer_connection); | |
470 | if (ret || found) { | |
bf35aaef | 471 | return ret; |
4164020e SM |
472 | } |
473 | ||
bf35aaef | 474 | const auto map = bt2::MapValue::create(); |
4164020e | 475 | |
30d81897 | 476 | if (base_url.empty()) { |
bf35aaef SM |
477 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Error: base_url empty."); |
478 | return -1; | |
4164020e | 479 | } |
30d81897 | 480 | |
4164020e SM |
481 | /* |
482 | * key = "url", | |
483 | * value = <string>, | |
484 | */ | |
bf35aaef SM |
485 | map->insert("url", |
486 | fmt::format("{}/host/{}/{}", base_url, session->hostname, session->session_name)); | |
4164020e SM |
487 | |
488 | /* | |
489 | * key = "target-hostname", | |
490 | * value = <string>, | |
491 | */ | |
bf35aaef | 492 | map->insert("target-hostname", session->hostname); |
4164020e SM |
493 | |
494 | /* | |
495 | * key = "session-name", | |
496 | * value = <string>, | |
497 | */ | |
bf35aaef | 498 | map->insert("session-name", session->session_name); |
4164020e SM |
499 | |
500 | /* | |
501 | * key = "timer-us", | |
502 | * value = <integer>, | |
503 | */ | |
504 | { | |
505 | uint32_t live_timer = be32toh(session->live_timer); | |
506 | ||
bf35aaef | 507 | map->insert("timer-us", (uint64_t) live_timer); |
4164020e SM |
508 | } |
509 | ||
510 | /* | |
511 | * key = "stream-count", | |
512 | * value = <integer>, | |
513 | */ | |
514 | { | |
515 | uint32_t streams = be32toh(session->streams); | |
516 | ||
bf35aaef | 517 | map->insert("stream-count", (uint64_t) streams); |
4164020e SM |
518 | } |
519 | ||
520 | /* | |
521 | * key = "client-count", | |
522 | * value = <integer>, | |
523 | */ | |
524 | { | |
525 | uint32_t clients = be32toh(session->clients); | |
526 | ||
bf35aaef | 527 | map->insert("client-count", (uint64_t) clients); |
4164020e | 528 | } |
14f28187 | 529 | |
bf35aaef SM |
530 | results.append(*map); |
531 | return 0; | |
7cdc2bab MD |
532 | } |
533 | ||
534 | /* | |
535 | * Data structure returned: | |
536 | * | |
537 | * { | |
538 | * <array> = { | |
539 | * [n] = { | |
540 | * <map> = { | |
541 | * { | |
542 | * key = "url", | |
543 | * value = <string>, | |
544 | * }, | |
545 | * { | |
546 | * key = "target-hostname", | |
547 | * value = <string>, | |
548 | * }, | |
549 | * { | |
550 | * key = "session-name", | |
551 | * value = <string>, | |
552 | * }, | |
553 | * { | |
554 | * key = "timer-us", | |
555 | * value = <integer>, | |
556 | * }, | |
557 | * { | |
558 | * key = "stream-count", | |
559 | * value = <integer>, | |
560 | * }, | |
561 | * { | |
562 | * key = "client-count", | |
563 | * value = <integer>, | |
564 | * }, | |
565 | * }, | |
566 | * } | |
567 | * } | |
568 | */ | |
569 | ||
5ad6219b SM |
570 | bt2::Value::Shared |
571 | live_viewer_connection_list_sessions(struct live_viewer_connection *viewer_connection) | |
7cdc2bab | 572 | { |
4164020e SM |
573 | enum lttng_live_viewer_status viewer_status; |
574 | struct lttng_viewer_cmd cmd; | |
575 | struct lttng_viewer_list_sessions list; | |
576 | uint32_t i, sessions_count; | |
bf35aaef | 577 | auto result = bt2::ArrayValue::create(); |
4164020e | 578 | |
0f5c5d5c SM |
579 | BT_CPPLOGD_SPEC(viewer_connection->logger, "Requesting list of sessions: cmd={}", |
580 | LTTNG_VIEWER_LIST_SESSIONS); | |
4164020e SM |
581 | |
582 | cmd.cmd = htobe32(LTTNG_VIEWER_LIST_SESSIONS); | |
583 | cmd.data_size = htobe64((uint64_t) 0); | |
584 | cmd.cmd_version = htobe32(0); | |
585 | ||
586 | viewer_status = lttng_live_send(viewer_connection, &cmd, sizeof(cmd)); | |
587 | if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_ERROR) { | |
5ad6219b SM |
588 | BT_CPPLOGE_APPEND_CAUSE_AND_THROW_SPEC(viewer_connection->logger, bt2::Error, |
589 | "Error sending list sessions command"); | |
4164020e | 590 | } else if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED) { |
5ad6219b | 591 | throw bt2c::TryAgain {}; |
4164020e SM |
592 | } |
593 | ||
594 | viewer_status = lttng_live_recv(viewer_connection, &list, sizeof(list)); | |
595 | if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_ERROR) { | |
5ad6219b SM |
596 | BT_CPPLOGE_APPEND_CAUSE_AND_THROW_SPEC(viewer_connection->logger, bt2::Error, |
597 | "Error receiving session list"); | |
4164020e | 598 | } else if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED) { |
5ad6219b | 599 | throw bt2c::TryAgain {}; |
4164020e SM |
600 | } |
601 | ||
602 | sessions_count = be32toh(list.sessions_count); | |
603 | for (i = 0; i < sessions_count; i++) { | |
604 | struct lttng_viewer_session lsession; | |
605 | ||
606 | viewer_status = lttng_live_recv(viewer_connection, &lsession, sizeof(lsession)); | |
607 | if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_ERROR) { | |
5ad6219b SM |
608 | BT_CPPLOGE_APPEND_CAUSE_AND_THROW_SPEC(viewer_connection->logger, bt2::Error, |
609 | "Error receiving session:"); | |
4164020e | 610 | } else if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED) { |
5ad6219b | 611 | throw bt2c::TryAgain {}; |
4164020e SM |
612 | } |
613 | ||
614 | lsession.hostname[LTTNG_VIEWER_HOST_NAME_MAX - 1] = '\0'; | |
615 | lsession.session_name[LTTNG_VIEWER_NAME_MAX - 1] = '\0'; | |
bf35aaef | 616 | if (list_append_session(*result, viewer_connection->url, &lsession, viewer_connection)) { |
5ad6219b SM |
617 | BT_CPPLOGE_APPEND_CAUSE_AND_THROW_SPEC(viewer_connection->logger, bt2::Error, |
618 | "Error appending session"); | |
4164020e SM |
619 | } |
620 | } | |
621 | ||
5ad6219b | 622 | return result; |
7cdc2bab MD |
623 | } |
624 | ||
4164020e SM |
625 | static enum lttng_live_viewer_status |
626 | lttng_live_query_session_ids(struct lttng_live_msg_iter *lttng_live_msg_iter) | |
7cdc2bab | 627 | { |
4164020e SM |
628 | struct lttng_viewer_cmd cmd; |
629 | struct lttng_viewer_list_sessions list; | |
630 | struct lttng_viewer_session lsession; | |
631 | uint32_t i, sessions_count; | |
632 | uint64_t session_id; | |
633 | enum lttng_live_viewer_status status; | |
d721bef8 | 634 | live_viewer_connection *viewer_connection = lttng_live_msg_iter->viewer_connection.get(); |
4164020e | 635 | |
0f5c5d5c SM |
636 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
637 | "Asking the relay daemon for the list of sessions: cmd={}", | |
638 | LTTNG_VIEWER_LIST_SESSIONS); | |
4164020e SM |
639 | |
640 | cmd.cmd = htobe32(LTTNG_VIEWER_LIST_SESSIONS); | |
641 | cmd.data_size = htobe64((uint64_t) 0); | |
642 | cmd.cmd_version = htobe32(0); | |
643 | ||
644 | status = lttng_live_send(viewer_connection, &cmd, sizeof(cmd)); | |
645 | if (status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 646 | viewer_handle_send_status(status, "list sessions command"); |
a97176ef | 647 | return status; |
4164020e SM |
648 | } |
649 | ||
650 | status = lttng_live_recv(viewer_connection, &list, sizeof(list)); | |
651 | if (status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 652 | viewer_handle_recv_status(status, "session list reply"); |
a97176ef | 653 | return status; |
4164020e SM |
654 | } |
655 | ||
656 | sessions_count = be32toh(list.sessions_count); | |
657 | for (i = 0; i < sessions_count; i++) { | |
658 | status = lttng_live_recv(viewer_connection, &lsession, sizeof(lsession)); | |
659 | if (status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 660 | viewer_handle_recv_status(status, "session reply"); |
a97176ef | 661 | return status; |
4164020e SM |
662 | } |
663 | lsession.hostname[LTTNG_VIEWER_HOST_NAME_MAX - 1] = '\0'; | |
664 | lsession.session_name[LTTNG_VIEWER_NAME_MAX - 1] = '\0'; | |
665 | session_id = be64toh(lsession.id); | |
666 | ||
0f5c5d5c SM |
667 | BT_CPPLOGI_SPEC(viewer_connection->logger, |
668 | "Adding session to internal list: " | |
669 | "session-id={}, hostname=\"{}\", session-name=\"{}\"", | |
670 | session_id, lsession.hostname, lsession.session_name); | |
4164020e SM |
671 | |
672 | if ((strncmp(lsession.session_name, viewer_connection->session_name->str, | |
673 | LTTNG_VIEWER_NAME_MAX) == 0) && | |
674 | (strncmp(lsession.hostname, viewer_connection->target_hostname->str, | |
675 | LTTNG_VIEWER_HOST_NAME_MAX) == 0)) { | |
676 | if (lttng_live_add_session(lttng_live_msg_iter, session_id, lsession.hostname, | |
677 | lsession.session_name)) { | |
0f5c5d5c SM |
678 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
679 | "Failed to add live session"); | |
a97176ef | 680 | return LTTNG_LIVE_VIEWER_STATUS_ERROR; |
4164020e SM |
681 | } |
682 | } | |
683 | } | |
684 | ||
a97176ef | 685 | return LTTNG_LIVE_VIEWER_STATUS_OK; |
7cdc2bab MD |
686 | } |
687 | ||
4164020e SM |
688 | enum lttng_live_viewer_status |
689 | lttng_live_create_viewer_session(struct lttng_live_msg_iter *lttng_live_msg_iter) | |
7cdc2bab | 690 | { |
4164020e SM |
691 | struct lttng_viewer_cmd cmd; |
692 | struct lttng_viewer_create_session_response resp; | |
693 | enum lttng_live_viewer_status status; | |
d721bef8 | 694 | live_viewer_connection *viewer_connection = lttng_live_msg_iter->viewer_connection.get(); |
4164020e | 695 | |
0f5c5d5c SM |
696 | BT_CPPLOGD_SPEC(viewer_connection->logger, "Creating a viewer session: cmd={}", |
697 | LTTNG_VIEWER_CREATE_SESSION); | |
4164020e SM |
698 | |
699 | cmd.cmd = htobe32(LTTNG_VIEWER_CREATE_SESSION); | |
700 | cmd.data_size = htobe64((uint64_t) 0); | |
701 | cmd.cmd_version = htobe32(0); | |
702 | ||
703 | status = lttng_live_send(viewer_connection, &cmd, sizeof(cmd)); | |
704 | if (status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 705 | viewer_handle_send_status(status, "create session command"); |
a97176ef | 706 | return status; |
4164020e SM |
707 | } |
708 | ||
709 | status = lttng_live_recv(viewer_connection, &resp, sizeof(resp)); | |
710 | if (status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 711 | viewer_handle_recv_status(status, "create session reply"); |
a97176ef | 712 | return status; |
4164020e SM |
713 | } |
714 | ||
715 | if (be32toh(resp.status) != LTTNG_VIEWER_CREATE_SESSION_OK) { | |
0f5c5d5c | 716 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Error creating viewer session"); |
a97176ef | 717 | return LTTNG_LIVE_VIEWER_STATUS_ERROR; |
4164020e SM |
718 | } |
719 | ||
720 | status = lttng_live_query_session_ids(lttng_live_msg_iter); | |
721 | if (status == LTTNG_LIVE_VIEWER_STATUS_ERROR) { | |
0f5c5d5c SM |
722 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
723 | "Failed to query live viewer session ids"); | |
a97176ef | 724 | return LTTNG_LIVE_VIEWER_STATUS_ERROR; |
4164020e | 725 | } else if (status == LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED) { |
a97176ef | 726 | return LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED; |
4164020e | 727 | } |
7cdc2bab | 728 | |
a97176ef | 729 | return LTTNG_LIVE_VIEWER_STATUS_OK; |
7cdc2bab MD |
730 | } |
731 | ||
4164020e SM |
732 | static enum lttng_live_viewer_status receive_streams(struct lttng_live_session *session, |
733 | uint32_t stream_count, | |
734 | bt_self_message_iterator *self_msg_iter) | |
7cdc2bab | 735 | { |
4164020e SM |
736 | uint32_t i; |
737 | struct lttng_live_msg_iter *lttng_live_msg_iter = session->lttng_live_msg_iter; | |
738 | enum lttng_live_viewer_status status; | |
d721bef8 | 739 | live_viewer_connection *viewer_connection = lttng_live_msg_iter->viewer_connection.get(); |
4164020e | 740 | |
0f5c5d5c | 741 | BT_CPPLOGI_SPEC(viewer_connection->logger, "Getting {} new streams", stream_count); |
4164020e SM |
742 | for (i = 0; i < stream_count; i++) { |
743 | struct lttng_viewer_stream stream; | |
744 | struct lttng_live_stream_iterator *live_stream; | |
745 | uint64_t stream_id; | |
746 | uint64_t ctf_trace_id; | |
747 | ||
748 | status = lttng_live_recv(viewer_connection, &stream, sizeof(stream)); | |
749 | if (status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 750 | viewer_handle_recv_status(status, "stream reply"); |
a97176ef | 751 | return status; |
4164020e SM |
752 | } |
753 | stream.path_name[LTTNG_VIEWER_PATH_MAX - 1] = '\0'; | |
754 | stream.channel_name[LTTNG_VIEWER_NAME_MAX - 1] = '\0'; | |
755 | stream_id = be64toh(stream.id); | |
756 | ctf_trace_id = be64toh(stream.ctf_trace_id); | |
757 | ||
758 | if (stream.metadata_flag) { | |
0f5c5d5c SM |
759 | BT_CPPLOGI_SPEC(viewer_connection->logger, " metadata stream {} : {}/{}", stream_id, |
760 | stream.path_name, stream.channel_name); | |
44bd6303 | 761 | if (lttng_live_metadata_create_stream(session, ctf_trace_id, stream_id)) { |
0f5c5d5c SM |
762 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
763 | "Error creating metadata stream"); | |
a97176ef | 764 | return LTTNG_LIVE_VIEWER_STATUS_ERROR; |
4164020e SM |
765 | } |
766 | session->lazy_stream_msg_init = true; | |
767 | } else { | |
0f5c5d5c SM |
768 | BT_CPPLOGI_SPEC(viewer_connection->logger, " stream {} : {}/{}", stream_id, |
769 | stream.path_name, stream.channel_name); | |
4164020e SM |
770 | live_stream = |
771 | lttng_live_stream_iterator_create(session, ctf_trace_id, stream_id, self_msg_iter); | |
772 | if (!live_stream) { | |
0f5c5d5c | 773 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Error creating stream"); |
a97176ef | 774 | return LTTNG_LIVE_VIEWER_STATUS_ERROR; |
4164020e SM |
775 | } |
776 | } | |
777 | } | |
7cdc2bab | 778 | |
a97176ef | 779 | return LTTNG_LIVE_VIEWER_STATUS_OK; |
7cdc2bab MD |
780 | } |
781 | ||
4164020e SM |
782 | enum lttng_live_viewer_status lttng_live_session_attach(struct lttng_live_session *session, |
783 | bt_self_message_iterator *self_msg_iter) | |
7cdc2bab | 784 | { |
4164020e SM |
785 | struct lttng_viewer_cmd cmd; |
786 | enum lttng_live_viewer_status status; | |
787 | struct lttng_viewer_attach_session_request rq; | |
788 | struct lttng_viewer_attach_session_response rp; | |
789 | struct lttng_live_msg_iter *lttng_live_msg_iter = session->lttng_live_msg_iter; | |
d721bef8 | 790 | live_viewer_connection *viewer_connection = lttng_live_msg_iter->viewer_connection.get(); |
4164020e SM |
791 | uint64_t session_id = session->id; |
792 | uint32_t streams_count; | |
793 | const size_t cmd_buf_len = sizeof(cmd) + sizeof(rq); | |
794 | char cmd_buf[cmd_buf_len]; | |
795 | ||
0f5c5d5c SM |
796 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
797 | "Attaching to session: cmd={}, session-id={}, seek={}", | |
798 | LTTNG_VIEWER_ATTACH_SESSION, session_id, LTTNG_VIEWER_SEEK_LAST); | |
4164020e SM |
799 | |
800 | cmd.cmd = htobe32(LTTNG_VIEWER_ATTACH_SESSION); | |
801 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); | |
802 | cmd.cmd_version = htobe32(0); | |
803 | ||
804 | memset(&rq, 0, sizeof(rq)); | |
805 | rq.session_id = htobe64(session_id); | |
806 | // TODO: add cmd line parameter to select seek beginning | |
807 | // rq.seek = htobe32(LTTNG_VIEWER_SEEK_BEGINNING); | |
808 | rq.seek = htobe32(LTTNG_VIEWER_SEEK_LAST); | |
809 | ||
810 | /* | |
811 | * Merge the cmd and connection request to prevent a write-write | |
812 | * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the | |
813 | * second write to be performed quickly in presence of Nagle's algorithm. | |
814 | */ | |
815 | memcpy(cmd_buf, &cmd, sizeof(cmd)); | |
816 | memcpy(cmd_buf + sizeof(cmd), &rq, sizeof(rq)); | |
817 | status = lttng_live_send(viewer_connection, &cmd_buf, cmd_buf_len); | |
818 | if (status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 819 | viewer_handle_send_status(status, "attach session command"); |
a97176ef | 820 | return status; |
4164020e SM |
821 | } |
822 | ||
823 | status = lttng_live_recv(viewer_connection, &rp, sizeof(rp)); | |
824 | if (status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 825 | viewer_handle_recv_status(status, "attach session reply"); |
a97176ef | 826 | return status; |
4164020e SM |
827 | } |
828 | ||
829 | streams_count = be32toh(rp.streams_count); | |
830 | switch (be32toh(rp.status)) { | |
831 | case LTTNG_VIEWER_ATTACH_OK: | |
832 | break; | |
833 | case LTTNG_VIEWER_ATTACH_UNK: | |
0f5c5d5c SM |
834 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Session id {} is unknown", |
835 | session_id); | |
a97176ef | 836 | return LTTNG_LIVE_VIEWER_STATUS_ERROR; |
4164020e | 837 | case LTTNG_VIEWER_ATTACH_ALREADY: |
0f5c5d5c SM |
838 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
839 | "There is already a viewer attached to this session"); | |
a97176ef | 840 | return LTTNG_LIVE_VIEWER_STATUS_ERROR; |
4164020e | 841 | case LTTNG_VIEWER_ATTACH_NOT_LIVE: |
0f5c5d5c | 842 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Not a live session"); |
a97176ef | 843 | return LTTNG_LIVE_VIEWER_STATUS_ERROR; |
4164020e | 844 | case LTTNG_VIEWER_ATTACH_SEEK_ERR: |
0f5c5d5c | 845 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Wrong seek parameter"); |
a97176ef | 846 | return LTTNG_LIVE_VIEWER_STATUS_ERROR; |
4164020e | 847 | default: |
0f5c5d5c SM |
848 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Unknown attach return code {}", |
849 | be32toh(rp.status)); | |
a97176ef | 850 | return LTTNG_LIVE_VIEWER_STATUS_ERROR; |
4164020e SM |
851 | } |
852 | ||
853 | /* We receive the initial list of streams. */ | |
854 | status = receive_streams(session, streams_count, self_msg_iter); | |
855 | switch (status) { | |
856 | case LTTNG_LIVE_VIEWER_STATUS_OK: | |
857 | break; | |
858 | case LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED: | |
a97176ef | 859 | return status; |
4164020e | 860 | case LTTNG_LIVE_VIEWER_STATUS_ERROR: |
0f5c5d5c | 861 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Error receiving streams"); |
a97176ef | 862 | return status; |
4164020e SM |
863 | default: |
864 | bt_common_abort(); | |
865 | } | |
866 | ||
867 | session->attached = true; | |
868 | session->new_streams_needed = false; | |
7cdc2bab | 869 | |
a97176ef | 870 | return LTTNG_LIVE_VIEWER_STATUS_OK; |
7cdc2bab MD |
871 | } |
872 | ||
4164020e | 873 | enum lttng_live_viewer_status lttng_live_session_detach(struct lttng_live_session *session) |
7cdc2bab | 874 | { |
4164020e SM |
875 | struct lttng_viewer_cmd cmd; |
876 | enum lttng_live_viewer_status status; | |
877 | struct lttng_viewer_detach_session_request rq; | |
878 | struct lttng_viewer_detach_session_response rp; | |
879 | struct lttng_live_msg_iter *lttng_live_msg_iter = session->lttng_live_msg_iter; | |
d721bef8 | 880 | live_viewer_connection *viewer_connection = lttng_live_msg_iter->viewer_connection.get(); |
4164020e SM |
881 | uint64_t session_id = session->id; |
882 | const size_t cmd_buf_len = sizeof(cmd) + sizeof(rq); | |
883 | char cmd_buf[cmd_buf_len]; | |
884 | ||
885 | /* | |
886 | * The session might already be detached and the viewer socket might | |
887 | * already been closed. This happens when calling this function when | |
888 | * tearing down the graph after an error. | |
889 | */ | |
890 | if (!session->attached || viewer_connection->control_sock == BT_INVALID_SOCKET) { | |
891 | return LTTNG_LIVE_VIEWER_STATUS_OK; | |
892 | } | |
893 | ||
0f5c5d5c SM |
894 | BT_CPPLOGD_SPEC(viewer_connection->logger, "Detaching from session: cmd={}, session-id={}", |
895 | LTTNG_VIEWER_DETACH_SESSION, session_id); | |
4164020e SM |
896 | |
897 | cmd.cmd = htobe32(LTTNG_VIEWER_DETACH_SESSION); | |
898 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); | |
899 | cmd.cmd_version = htobe32(0); | |
900 | ||
901 | memset(&rq, 0, sizeof(rq)); | |
902 | rq.session_id = htobe64(session_id); | |
903 | ||
904 | /* | |
905 | * Merge the cmd and connection request to prevent a write-write | |
906 | * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the | |
907 | * second write to be performed quickly in presence of Nagle's algorithm. | |
908 | */ | |
909 | memcpy(cmd_buf, &cmd, sizeof(cmd)); | |
910 | memcpy(cmd_buf + sizeof(cmd), &rq, sizeof(rq)); | |
911 | status = lttng_live_send(viewer_connection, &cmd_buf, cmd_buf_len); | |
912 | if (status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 913 | viewer_handle_send_status(status, "detach session command"); |
a97176ef | 914 | return status; |
4164020e SM |
915 | } |
916 | ||
917 | status = lttng_live_recv(viewer_connection, &rp, sizeof(rp)); | |
918 | if (status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 919 | viewer_handle_recv_status(status, "detach session reply"); |
a97176ef | 920 | return status; |
4164020e SM |
921 | } |
922 | ||
923 | switch (be32toh(rp.status)) { | |
924 | case LTTNG_VIEWER_DETACH_SESSION_OK: | |
925 | break; | |
926 | case LTTNG_VIEWER_DETACH_SESSION_UNK: | |
0f5c5d5c | 927 | BT_CPPLOGW_SPEC(viewer_connection->logger, "Session id {} is unknown", session_id); |
a97176ef | 928 | return LTTNG_LIVE_VIEWER_STATUS_ERROR; |
4164020e | 929 | case LTTNG_VIEWER_DETACH_SESSION_ERR: |
0f5c5d5c | 930 | BT_CPPLOGW_SPEC(viewer_connection->logger, "Error detaching session id {}", session_id); |
a97176ef | 931 | return LTTNG_LIVE_VIEWER_STATUS_ERROR; |
4164020e | 932 | default: |
0f5c5d5c SM |
933 | BT_CPPLOGE_SPEC(viewer_connection->logger, "Unknown detach return code {}", |
934 | be32toh(rp.status)); | |
a97176ef | 935 | return LTTNG_LIVE_VIEWER_STATUS_ERROR; |
4164020e SM |
936 | } |
937 | ||
938 | session->attached = false; | |
939 | ||
a97176ef | 940 | return LTTNG_LIVE_VIEWER_STATUS_OK; |
7cdc2bab MD |
941 | } |
942 | ||
4164020e | 943 | enum lttng_live_get_one_metadata_status |
15fcc425 | 944 | lttng_live_get_one_metadata_packet(struct lttng_live_trace *trace, std::vector<char>& buf) |
7cdc2bab | 945 | { |
4164020e | 946 | uint64_t len = 0; |
4164020e SM |
947 | enum lttng_live_viewer_status viewer_status; |
948 | struct lttng_viewer_cmd cmd; | |
949 | struct lttng_viewer_get_metadata rq; | |
950 | struct lttng_viewer_metadata_packet rp; | |
76edb16f | 951 | std::vector<char> data; |
4164020e SM |
952 | struct lttng_live_session *session = trace->session; |
953 | struct lttng_live_msg_iter *lttng_live_msg_iter = session->lttng_live_msg_iter; | |
e66be7c3 | 954 | struct lttng_live_metadata *metadata = trace->metadata.get(); |
d721bef8 | 955 | live_viewer_connection *viewer_connection = lttng_live_msg_iter->viewer_connection.get(); |
4164020e SM |
956 | const size_t cmd_buf_len = sizeof(cmd) + sizeof(rq); |
957 | char cmd_buf[cmd_buf_len]; | |
958 | ||
0f5c5d5c SM |
959 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
960 | "Requesting new metadata for trace:" | |
961 | "cmd={}, trace-id={}, metadata-stream-id={}", | |
962 | LTTNG_VIEWER_GET_METADATA, trace->id, metadata->stream_id); | |
4164020e SM |
963 | |
964 | rq.stream_id = htobe64(metadata->stream_id); | |
965 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_METADATA); | |
966 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); | |
967 | cmd.cmd_version = htobe32(0); | |
968 | ||
969 | /* | |
970 | * Merge the cmd and connection request to prevent a write-write | |
971 | * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the | |
972 | * second write to be performed quickly in presence of Nagle's algorithm. | |
973 | */ | |
974 | memcpy(cmd_buf, &cmd, sizeof(cmd)); | |
975 | memcpy(cmd_buf + sizeof(cmd), &rq, sizeof(rq)); | |
976 | viewer_status = lttng_live_send(viewer_connection, &cmd_buf, cmd_buf_len); | |
977 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 978 | viewer_handle_send_status(viewer_status, "get metadata command"); |
a97176ef | 979 | return (lttng_live_get_one_metadata_status) viewer_status; |
4164020e SM |
980 | } |
981 | ||
982 | viewer_status = lttng_live_recv(viewer_connection, &rp, sizeof(rp)); | |
983 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 984 | viewer_handle_recv_status(viewer_status, "get metadata reply"); |
a97176ef | 985 | return (lttng_live_get_one_metadata_status) viewer_status; |
4164020e SM |
986 | } |
987 | ||
988 | switch (be32toh(rp.status)) { | |
989 | case LTTNG_VIEWER_METADATA_OK: | |
0f5c5d5c | 990 | BT_CPPLOGD_SPEC(viewer_connection->logger, "Received get_metadata response: ok"); |
4164020e SM |
991 | break; |
992 | case LTTNG_VIEWER_NO_NEW_METADATA: | |
0f5c5d5c | 993 | BT_CPPLOGD_SPEC(viewer_connection->logger, "Received get_metadata response: no new"); |
a97176ef | 994 | return LTTNG_LIVE_GET_ONE_METADATA_STATUS_END; |
4164020e SM |
995 | case LTTNG_VIEWER_METADATA_ERR: |
996 | /* | |
997 | * The Relayd cannot find this stream id. Maybe its | |
998 | * gone already. This can happen in short lived UST app | |
999 | * in a per-pid session. | |
1000 | */ | |
0f5c5d5c | 1001 | BT_CPPLOGD_SPEC(viewer_connection->logger, "Received get_metadata response: error"); |
a97176ef | 1002 | return LTTNG_LIVE_GET_ONE_METADATA_STATUS_CLOSED; |
4164020e | 1003 | default: |
0f5c5d5c SM |
1004 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
1005 | "Received get_metadata response: unknown"); | |
a97176ef | 1006 | return LTTNG_LIVE_GET_ONE_METADATA_STATUS_ERROR; |
4164020e SM |
1007 | } |
1008 | ||
1009 | len = be64toh(rp.len); | |
c5ce3927 FD |
1010 | if (len == 0) { |
1011 | /* | |
1012 | * We received a `LTTNG_VIEWER_METADATA_OK` with a packet | |
1013 | * length of 0. This means we must try again. This scenario | |
1014 | * arises when a clear command is performed on an lttng session. | |
1015 | */ | |
0f5c5d5c SM |
1016 | BT_CPPLOGD_SPEC( |
1017 | viewer_connection->logger, | |
c5ce3927 | 1018 | "Expecting a metadata packet of size 0. Retry to get a packet from the relay."); |
a97176ef | 1019 | return LTTNG_LIVE_GET_ONE_METADATA_STATUS_OK; |
c5ce3927 FD |
1020 | } |
1021 | ||
0f5c5d5c | 1022 | BT_CPPLOGD_SPEC(viewer_connection->logger, "Writing {} bytes to metadata", len); |
4164020e | 1023 | if (len <= 0) { |
0f5c5d5c | 1024 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Erroneous response length"); |
a97176ef | 1025 | return LTTNG_LIVE_GET_ONE_METADATA_STATUS_ERROR; |
4164020e SM |
1026 | } |
1027 | ||
76edb16f | 1028 | data.resize(len); |
4164020e | 1029 | |
76edb16f | 1030 | viewer_status = lttng_live_recv(viewer_connection, data.data(), len); |
4164020e | 1031 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { |
0f5c5d5c | 1032 | viewer_handle_recv_status(viewer_status, "get metadata packet"); |
a97176ef | 1033 | return (lttng_live_get_one_metadata_status) viewer_status; |
4164020e SM |
1034 | } |
1035 | ||
1036 | /* | |
1037 | * Write the metadata to the file handle. | |
1038 | */ | |
76edb16f | 1039 | buf.insert(buf.end(), data.begin(), data.end()); |
4164020e | 1040 | |
a97176ef | 1041 | return LTTNG_LIVE_GET_ONE_METADATA_STATUS_OK; |
7cdc2bab MD |
1042 | } |
1043 | ||
1044 | /* | |
1045 | * Assign the fields from a lttng_viewer_index to a packet_index. | |
1046 | */ | |
4164020e SM |
1047 | static void lttng_index_to_packet_index(struct lttng_viewer_index *lindex, |
1048 | struct packet_index *pindex) | |
7cdc2bab | 1049 | { |
4164020e SM |
1050 | BT_ASSERT(lindex); |
1051 | BT_ASSERT(pindex); | |
1052 | ||
1053 | pindex->offset = be64toh(lindex->offset); | |
1054 | pindex->packet_size = be64toh(lindex->packet_size); | |
1055 | pindex->content_size = be64toh(lindex->content_size); | |
1056 | pindex->ts_cycles.timestamp_begin = be64toh(lindex->timestamp_begin); | |
1057 | pindex->ts_cycles.timestamp_end = be64toh(lindex->timestamp_end); | |
1058 | pindex->events_discarded = be64toh(lindex->events_discarded); | |
7cdc2bab MD |
1059 | } |
1060 | ||
4164020e | 1061 | static void lttng_live_need_new_streams(struct lttng_live_msg_iter *lttng_live_msg_iter) |
36e94ad6 | 1062 | { |
751aaa62 | 1063 | for (const auto& session : lttng_live_msg_iter->sessions) { |
0f5c5d5c SM |
1064 | BT_CPPLOGD_SPEC(lttng_live_msg_iter->logger, |
1065 | "Marking session as needing new streams: " | |
1066 | "session-id={}", | |
1067 | session->id); | |
4164020e SM |
1068 | session->new_streams_needed = true; |
1069 | } | |
36e94ad6 FD |
1070 | } |
1071 | ||
4164020e SM |
1072 | enum lttng_live_iterator_status |
1073 | lttng_live_get_next_index(struct lttng_live_msg_iter *lttng_live_msg_iter, | |
1074 | struct lttng_live_stream_iterator *stream, struct packet_index *index) | |
7cdc2bab | 1075 | { |
4164020e SM |
1076 | struct lttng_viewer_cmd cmd; |
1077 | struct lttng_viewer_get_next_index rq; | |
1078 | enum lttng_live_viewer_status viewer_status; | |
1079 | struct lttng_viewer_index rp; | |
d721bef8 | 1080 | live_viewer_connection *viewer_connection = lttng_live_msg_iter->viewer_connection.get(); |
4164020e SM |
1081 | struct lttng_live_trace *trace = stream->trace; |
1082 | const size_t cmd_buf_len = sizeof(cmd) + sizeof(rq); | |
1083 | char cmd_buf[cmd_buf_len]; | |
1084 | uint32_t flags, rp_status; | |
1085 | ||
0f5c5d5c SM |
1086 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
1087 | "Requesting next index for stream: cmd={}, " | |
1088 | "viewer-stream-id={}", | |
1089 | LTTNG_VIEWER_GET_NEXT_INDEX, stream->viewer_stream_id); | |
4164020e SM |
1090 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_NEXT_INDEX); |
1091 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); | |
1092 | cmd.cmd_version = htobe32(0); | |
1093 | ||
1094 | memset(&rq, 0, sizeof(rq)); | |
1095 | rq.stream_id = htobe64(stream->viewer_stream_id); | |
1096 | ||
1097 | /* | |
1098 | * Merge the cmd and connection request to prevent a write-write | |
1099 | * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the | |
1100 | * second write to be performed quickly in presence of Nagle's algorithm. | |
1101 | */ | |
1102 | memcpy(cmd_buf, &cmd, sizeof(cmd)); | |
1103 | memcpy(cmd_buf + sizeof(cmd), &rq, sizeof(rq)); | |
1104 | ||
1105 | viewer_status = lttng_live_send(viewer_connection, &cmd_buf, cmd_buf_len); | |
1106 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 1107 | viewer_handle_send_status(viewer_status, "get next index command"); |
a97176ef | 1108 | return viewer_status_to_live_iterator_status(viewer_status); |
4164020e SM |
1109 | } |
1110 | ||
1111 | viewer_status = lttng_live_recv(viewer_connection, &rp, sizeof(rp)); | |
1112 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 1113 | viewer_handle_recv_status(viewer_status, "get next index reply"); |
a97176ef | 1114 | return viewer_status_to_live_iterator_status(viewer_status); |
4164020e SM |
1115 | } |
1116 | ||
1117 | flags = be32toh(rp.flags); | |
1118 | rp_status = be32toh(rp.status); | |
1119 | ||
0f5c5d5c SM |
1120 | BT_CPPLOGD_SPEC( |
1121 | viewer_connection->logger, "Received response from relay daemon: cmd=%s, response={}", | |
1122 | LTTNG_VIEWER_GET_NEXT_INDEX, static_cast<lttng_viewer_next_index_return_code>(rp_status)); | |
ca622546 JG |
1123 | |
1124 | if (flags & LTTNG_VIEWER_FLAG_NEW_STREAM) { | |
0f5c5d5c SM |
1125 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
1126 | "Marking all sessions as possibly needing new streams: " | |
1127 | "response={}, response-flag=NEW_STREAM", | |
1128 | static_cast<lttng_viewer_next_index_return_code>(rp_status)); | |
ca622546 JG |
1129 | lttng_live_need_new_streams(lttng_live_msg_iter); |
1130 | } | |
1131 | ||
4164020e SM |
1132 | switch (rp_status) { |
1133 | case LTTNG_VIEWER_INDEX_INACTIVE: | |
1134 | { | |
1135 | uint64_t ctf_stream_class_id; | |
1136 | ||
1137 | memset(index, 0, sizeof(struct packet_index)); | |
1138 | index->ts_cycles.timestamp_end = be64toh(rp.timestamp_end); | |
1139 | stream->current_inactivity_ts = index->ts_cycles.timestamp_end; | |
1140 | ctf_stream_class_id = be64toh(rp.stream_id); | |
1141 | if (stream->ctf_stream_class_id.is_set) { | |
1142 | BT_ASSERT(stream->ctf_stream_class_id.value == ctf_stream_class_id); | |
1143 | } else { | |
1144 | stream->ctf_stream_class_id.value = ctf_stream_class_id; | |
1145 | stream->ctf_stream_class_id.is_set = true; | |
1146 | } | |
1147 | lttng_live_stream_iterator_set_state(stream, LTTNG_LIVE_STREAM_QUIESCENT); | |
a97176ef | 1148 | return LTTNG_LIVE_ITERATOR_STATUS_OK; |
4164020e SM |
1149 | } |
1150 | case LTTNG_VIEWER_INDEX_OK: | |
1151 | { | |
1152 | uint64_t ctf_stream_class_id; | |
1153 | ||
1154 | lttng_index_to_packet_index(&rp, index); | |
1155 | ctf_stream_class_id = be64toh(rp.stream_id); | |
1156 | if (stream->ctf_stream_class_id.is_set) { | |
1157 | BT_ASSERT(stream->ctf_stream_class_id.value == ctf_stream_class_id); | |
1158 | } else { | |
1159 | stream->ctf_stream_class_id.value = ctf_stream_class_id; | |
1160 | stream->ctf_stream_class_id.is_set = true; | |
1161 | } | |
4164020e SM |
1162 | lttng_live_stream_iterator_set_state(stream, LTTNG_LIVE_STREAM_ACTIVE_DATA); |
1163 | ||
1164 | if (flags & LTTNG_VIEWER_FLAG_NEW_METADATA) { | |
0f5c5d5c SM |
1165 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
1166 | "Marking trace as needing new metadata: " | |
1167 | "response={}, response-flag=NEW_METADATA, trace-id={}", | |
1168 | static_cast<lttng_viewer_next_index_return_code>(rp_status), trace->id); | |
4164020e SM |
1169 | trace->metadata_stream_state = LTTNG_LIVE_METADATA_STREAM_STATE_NEEDED; |
1170 | } | |
a97176ef | 1171 | return LTTNG_LIVE_ITERATOR_STATUS_OK; |
4164020e SM |
1172 | break; |
1173 | } | |
1174 | case LTTNG_VIEWER_INDEX_RETRY: | |
1175 | memset(index, 0, sizeof(struct packet_index)); | |
1176 | lttng_live_stream_iterator_set_state(stream, LTTNG_LIVE_STREAM_ACTIVE_NO_DATA); | |
a97176ef | 1177 | return LTTNG_LIVE_ITERATOR_STATUS_AGAIN; |
4164020e SM |
1178 | case LTTNG_VIEWER_INDEX_HUP: |
1179 | memset(index, 0, sizeof(struct packet_index)); | |
1180 | index->offset = EOF; | |
1181 | lttng_live_stream_iterator_set_state(stream, LTTNG_LIVE_STREAM_EOF); | |
1182 | stream->has_stream_hung_up = true; | |
a97176ef | 1183 | return LTTNG_LIVE_ITERATOR_STATUS_END; |
4164020e SM |
1184 | case LTTNG_VIEWER_INDEX_ERR: |
1185 | memset(index, 0, sizeof(struct packet_index)); | |
1186 | lttng_live_stream_iterator_set_state(stream, LTTNG_LIVE_STREAM_ACTIVE_NO_DATA); | |
a97176ef | 1187 | return LTTNG_LIVE_ITERATOR_STATUS_ERROR; |
4164020e | 1188 | default: |
0f5c5d5c SM |
1189 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
1190 | "Received get_next_index response: unknown value"); | |
4164020e SM |
1191 | memset(index, 0, sizeof(struct packet_index)); |
1192 | lttng_live_stream_iterator_set_state(stream, LTTNG_LIVE_STREAM_ACTIVE_NO_DATA); | |
a97176ef | 1193 | return LTTNG_LIVE_ITERATOR_STATUS_ERROR; |
4164020e | 1194 | } |
7cdc2bab MD |
1195 | } |
1196 | ||
4164020e SM |
1197 | enum ctf_msg_iter_medium_status |
1198 | lttng_live_get_stream_bytes(struct lttng_live_msg_iter *lttng_live_msg_iter, | |
1199 | struct lttng_live_stream_iterator *stream, uint8_t *buf, | |
1200 | uint64_t offset, uint64_t req_len, uint64_t *recv_len) | |
7cdc2bab | 1201 | { |
4164020e SM |
1202 | enum lttng_live_viewer_status viewer_status; |
1203 | struct lttng_viewer_trace_packet rp; | |
1204 | struct lttng_viewer_cmd cmd; | |
1205 | struct lttng_viewer_get_packet rq; | |
d721bef8 | 1206 | live_viewer_connection *viewer_connection = lttng_live_msg_iter->viewer_connection.get(); |
4164020e SM |
1207 | struct lttng_live_trace *trace = stream->trace; |
1208 | const size_t cmd_buf_len = sizeof(cmd) + sizeof(rq); | |
1209 | char cmd_buf[cmd_buf_len]; | |
1210 | uint32_t flags, rp_status; | |
1211 | ||
0f5c5d5c SM |
1212 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
1213 | "Requesting data from stream: cmd={}, " | |
1214 | "offset={}, request-len={}", | |
1215 | LTTNG_VIEWER_GET_PACKET, offset, req_len); | |
4164020e SM |
1216 | |
1217 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_PACKET); | |
1218 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); | |
1219 | cmd.cmd_version = htobe32(0); | |
1220 | ||
1221 | memset(&rq, 0, sizeof(rq)); | |
1222 | rq.stream_id = htobe64(stream->viewer_stream_id); | |
1223 | rq.offset = htobe64(offset); | |
1224 | rq.len = htobe32(req_len); | |
1225 | ||
1226 | /* | |
1227 | * Merge the cmd and connection request to prevent a write-write | |
1228 | * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the | |
1229 | * second write to be performed quickly in presence of Nagle's algorithm. | |
1230 | */ | |
1231 | memcpy(cmd_buf, &cmd, sizeof(cmd)); | |
1232 | memcpy(cmd_buf + sizeof(cmd), &rq, sizeof(rq)); | |
1233 | ||
1234 | viewer_status = lttng_live_send(viewer_connection, &cmd_buf, cmd_buf_len); | |
1235 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 1236 | viewer_handle_send_status(viewer_status, "get data packet command"); |
a97176ef | 1237 | return viewer_status_to_ctf_msg_iter_medium_status(viewer_status); |
4164020e SM |
1238 | } |
1239 | ||
1240 | viewer_status = lttng_live_recv(viewer_connection, &rp, sizeof(rp)); | |
1241 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 1242 | viewer_handle_recv_status(viewer_status, "get data packet reply"); |
a97176ef | 1243 | return viewer_status_to_ctf_msg_iter_medium_status(viewer_status); |
4164020e SM |
1244 | } |
1245 | ||
1246 | flags = be32toh(rp.flags); | |
1247 | rp_status = be32toh(rp.status); | |
1248 | ||
0f5c5d5c SM |
1249 | BT_CPPLOGD_SPEC( |
1250 | viewer_connection->logger, "Received response from relay daemon: cmd={}, response={}", | |
1251 | LTTNG_VIEWER_GET_PACKET, static_cast<lttng_viewer_get_packet_return_code>(rp_status)); | |
4164020e SM |
1252 | switch (rp_status) { |
1253 | case LTTNG_VIEWER_GET_PACKET_OK: | |
1254 | req_len = be32toh(rp.len); | |
0f5c5d5c SM |
1255 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
1256 | "Got packet from relay daemon: response={}, packet-len={}", | |
1257 | static_cast<lttng_viewer_get_packet_return_code>(rp_status), req_len); | |
4164020e SM |
1258 | break; |
1259 | case LTTNG_VIEWER_GET_PACKET_RETRY: | |
1260 | /* Unimplemented by relay daemon */ | |
a97176ef | 1261 | return CTF_MSG_ITER_MEDIUM_STATUS_AGAIN; |
4164020e SM |
1262 | case LTTNG_VIEWER_GET_PACKET_ERR: |
1263 | if (flags & LTTNG_VIEWER_FLAG_NEW_METADATA) { | |
0f5c5d5c SM |
1264 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
1265 | "Marking trace as needing new metadata: " | |
1266 | "response={}, response-flag=NEW_METADATA, trace-id={}", | |
1267 | static_cast<lttng_viewer_get_packet_return_code>(rp_status), trace->id); | |
4164020e SM |
1268 | trace->metadata_stream_state = LTTNG_LIVE_METADATA_STREAM_STATE_NEEDED; |
1269 | } | |
1270 | if (flags & LTTNG_VIEWER_FLAG_NEW_STREAM) { | |
0f5c5d5c SM |
1271 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
1272 | "Marking all sessions as possibly needing new streams: " | |
1273 | "response={}, response-flag=NEW_STREAM", | |
1274 | static_cast<lttng_viewer_get_packet_return_code>(rp_status)); | |
4164020e SM |
1275 | lttng_live_need_new_streams(lttng_live_msg_iter); |
1276 | } | |
1277 | if (flags & (LTTNG_VIEWER_FLAG_NEW_METADATA | LTTNG_VIEWER_FLAG_NEW_STREAM)) { | |
0f5c5d5c SM |
1278 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
1279 | "Reply with any one flags set means we should retry: response={}", | |
1280 | static_cast<lttng_viewer_get_packet_return_code>(rp_status)); | |
a97176ef | 1281 | return CTF_MSG_ITER_MEDIUM_STATUS_AGAIN; |
4164020e | 1282 | } |
0f5c5d5c SM |
1283 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
1284 | "Received get_data_packet response: error"); | |
a97176ef | 1285 | return CTF_MSG_ITER_MEDIUM_STATUS_ERROR; |
4164020e | 1286 | case LTTNG_VIEWER_GET_PACKET_EOF: |
a97176ef | 1287 | return CTF_MSG_ITER_MEDIUM_STATUS_EOF; |
4164020e | 1288 | default: |
0f5c5d5c SM |
1289 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
1290 | "Received get_data_packet response: unknown ({})", rp_status); | |
a97176ef | 1291 | return CTF_MSG_ITER_MEDIUM_STATUS_ERROR; |
4164020e SM |
1292 | } |
1293 | ||
1294 | if (req_len == 0) { | |
a97176ef | 1295 | return CTF_MSG_ITER_MEDIUM_STATUS_ERROR; |
4164020e SM |
1296 | } |
1297 | ||
1298 | viewer_status = lttng_live_recv(viewer_connection, buf, req_len); | |
1299 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 1300 | viewer_handle_recv_status(viewer_status, "get data packet"); |
a97176ef | 1301 | return viewer_status_to_ctf_msg_iter_medium_status(viewer_status); |
4164020e SM |
1302 | } |
1303 | *recv_len = req_len; | |
1304 | ||
a97176ef | 1305 | return CTF_MSG_ITER_MEDIUM_STATUS_OK; |
7cdc2bab MD |
1306 | } |
1307 | ||
1308 | /* | |
1309 | * Request new streams for a session. | |
1310 | */ | |
4164020e SM |
1311 | enum lttng_live_iterator_status |
1312 | lttng_live_session_get_new_streams(struct lttng_live_session *session, | |
1313 | bt_self_message_iterator *self_msg_iter) | |
7cdc2bab | 1314 | { |
4164020e SM |
1315 | struct lttng_viewer_cmd cmd; |
1316 | struct lttng_viewer_new_streams_request rq; | |
1317 | struct lttng_viewer_new_streams_response rp; | |
1318 | struct lttng_live_msg_iter *lttng_live_msg_iter = session->lttng_live_msg_iter; | |
1319 | enum lttng_live_viewer_status viewer_status; | |
d721bef8 | 1320 | live_viewer_connection *viewer_connection = lttng_live_msg_iter->viewer_connection.get(); |
4164020e SM |
1321 | uint32_t streams_count; |
1322 | const size_t cmd_buf_len = sizeof(cmd) + sizeof(rq); | |
1323 | char cmd_buf[cmd_buf_len]; | |
1324 | ||
1325 | if (!session->new_streams_needed) { | |
a97176ef | 1326 | return LTTNG_LIVE_ITERATOR_STATUS_OK; |
4164020e SM |
1327 | } |
1328 | ||
0f5c5d5c SM |
1329 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
1330 | "Requesting new streams for session: cmd={}, session-id={}", | |
1331 | LTTNG_VIEWER_GET_NEW_STREAMS, session->id); | |
4164020e SM |
1332 | |
1333 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_NEW_STREAMS); | |
1334 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); | |
1335 | cmd.cmd_version = htobe32(0); | |
1336 | ||
1337 | memset(&rq, 0, sizeof(rq)); | |
1338 | rq.session_id = htobe64(session->id); | |
1339 | ||
1340 | /* | |
1341 | * Merge the cmd and connection request to prevent a write-write | |
1342 | * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the | |
1343 | * second write to be performed quickly in presence of Nagle's algorithm. | |
1344 | */ | |
1345 | memcpy(cmd_buf, &cmd, sizeof(cmd)); | |
1346 | memcpy(cmd_buf + sizeof(cmd), &rq, sizeof(rq)); | |
1347 | ||
1348 | viewer_status = lttng_live_send(viewer_connection, &cmd_buf, cmd_buf_len); | |
1349 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 1350 | viewer_handle_send_status(viewer_status, "get new streams command"); |
a97176ef | 1351 | return viewer_status_to_live_iterator_status(viewer_status); |
4164020e SM |
1352 | } |
1353 | ||
1354 | viewer_status = lttng_live_recv(viewer_connection, &rp, sizeof(rp)); | |
1355 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 1356 | viewer_handle_recv_status(viewer_status, "get new streams reply"); |
a97176ef | 1357 | return viewer_status_to_live_iterator_status(viewer_status); |
4164020e SM |
1358 | } |
1359 | ||
1360 | streams_count = be32toh(rp.streams_count); | |
1361 | ||
1362 | switch (be32toh(rp.status)) { | |
1363 | case LTTNG_VIEWER_NEW_STREAMS_OK: | |
1364 | session->new_streams_needed = false; | |
1365 | break; | |
1366 | case LTTNG_VIEWER_NEW_STREAMS_NO_NEW: | |
1367 | session->new_streams_needed = false; | |
a97176ef | 1368 | return LTTNG_LIVE_ITERATOR_STATUS_OK; |
4164020e SM |
1369 | case LTTNG_VIEWER_NEW_STREAMS_HUP: |
1370 | session->new_streams_needed = false; | |
1371 | session->closed = true; | |
a97176ef | 1372 | return LTTNG_LIVE_ITERATOR_STATUS_END; |
4164020e | 1373 | case LTTNG_VIEWER_NEW_STREAMS_ERR: |
0f5c5d5c | 1374 | BT_CPPLOGD_SPEC(viewer_connection->logger, "Received get_new_streams response: error"); |
a97176ef | 1375 | return LTTNG_LIVE_ITERATOR_STATUS_ERROR; |
4164020e | 1376 | default: |
0f5c5d5c | 1377 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
a97176ef | 1378 | "Received get_new_streams response: Unknown return code {}", |
0f5c5d5c | 1379 | be32toh(rp.status)); |
a97176ef | 1380 | return LTTNG_LIVE_ITERATOR_STATUS_ERROR; |
4164020e SM |
1381 | } |
1382 | ||
1383 | viewer_status = receive_streams(session, streams_count, self_msg_iter); | |
1384 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 1385 | viewer_handle_recv_status(viewer_status, "new streams"); |
a97176ef | 1386 | return viewer_status_to_live_iterator_status(viewer_status); |
4164020e SM |
1387 | } |
1388 | ||
a97176ef | 1389 | return LTTNG_LIVE_ITERATOR_STATUS_OK; |
7cdc2bab MD |
1390 | } |
1391 | ||
d721bef8 SM |
1392 | enum lttng_live_viewer_status |
1393 | live_viewer_connection_create(const char *url, bool in_query, | |
1394 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
1395 | const bt2c::Logger& parentLogger, live_viewer_connection::UP& viewer) | |
7cdc2bab | 1396 | { |
d721bef8 | 1397 | auto viewer_connection = bt2s::make_unique<live_viewer_connection>(parentLogger); |
4164020e | 1398 | |
0f5c5d5c SM |
1399 | if (bt_socket_init(viewer_connection->logger) != 0) { |
1400 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Failed to init socket"); | |
d721bef8 | 1401 | return LTTNG_LIVE_VIEWER_STATUS_ERROR; |
4164020e SM |
1402 | } |
1403 | ||
4164020e SM |
1404 | viewer_connection->control_sock = BT_INVALID_SOCKET; |
1405 | viewer_connection->port = -1; | |
1406 | viewer_connection->in_query = in_query; | |
1407 | viewer_connection->lttng_live_msg_iter = lttng_live_msg_iter; | |
30d81897 | 1408 | viewer_connection->url = url; |
4164020e | 1409 | |
0f5c5d5c | 1410 | BT_CPPLOGD_SPEC(viewer_connection->logger, "Establishing connection to url \"{}\"...", url); |
d721bef8 SM |
1411 | const auto status = lttng_live_connect_viewer(viewer_connection.get()); |
1412 | ||
4164020e SM |
1413 | /* |
1414 | * Only print error and append cause in case of error. not in case of | |
1415 | * interruption. | |
1416 | */ | |
1417 | if (status == LTTNG_LIVE_VIEWER_STATUS_ERROR) { | |
0f5c5d5c SM |
1418 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
1419 | "Failed to establish connection: " | |
1420 | "url=\"{}\"", | |
1421 | url); | |
d721bef8 | 1422 | return status; |
4164020e | 1423 | } else if (status == LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED) { |
d721bef8 | 1424 | return status; |
4164020e | 1425 | } |
0f5c5d5c | 1426 | BT_CPPLOGD_SPEC(viewer_connection->logger, "Connection to url \"{}\" is established", url); |
4164020e | 1427 | |
d721bef8 SM |
1428 | viewer = std::move(viewer_connection); |
1429 | return LTTNG_LIVE_VIEWER_STATUS_OK; | |
7cdc2bab MD |
1430 | } |
1431 | ||
277bcb7f | 1432 | live_viewer_connection::~live_viewer_connection() |
7cdc2bab | 1433 | { |
277bcb7f | 1434 | BT_CPPLOGD_SPEC(this->logger, "Closing connection to relay: relay-url=\"{}\"", this->url); |
b9e6ec43 | 1435 | |
e5694f0e | 1436 | viewer_connection_close_socket(this); |
1cb3cdd7 | 1437 | |
4164020e | 1438 | bt_socket_fini(); |
7cdc2bab | 1439 | } |