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 | ||
81c7f242 SM |
65 | static inline enum lttng_live_get_stream_bytes_status |
66 | viewer_status_to_lttng_live_get_stream_bytes_status(enum lttng_live_viewer_status viewer_status) | |
f79c2d7a | 67 | { |
4164020e SM |
68 | switch (viewer_status) { |
69 | case LTTNG_LIVE_VIEWER_STATUS_OK: | |
81c7f242 | 70 | return LTTNG_LIVE_GET_STREAM_BYTES_STATUS_OK; |
4164020e | 71 | case LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED: |
81c7f242 | 72 | return LTTNG_LIVE_GET_STREAM_BYTES_STATUS_AGAIN; |
4164020e | 73 | case LTTNG_LIVE_VIEWER_STATUS_ERROR: |
81c7f242 | 74 | return LTTNG_LIVE_GET_STREAM_BYTES_STATUS_ERROR; |
4164020e SM |
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 | 732 | static enum lttng_live_viewer_status receive_streams(struct lttng_live_session *session, |
81c7f242 | 733 | uint32_t stream_count) |
7cdc2bab | 734 | { |
4164020e SM |
735 | uint32_t i; |
736 | struct lttng_live_msg_iter *lttng_live_msg_iter = session->lttng_live_msg_iter; | |
737 | enum lttng_live_viewer_status status; | |
d721bef8 | 738 | live_viewer_connection *viewer_connection = lttng_live_msg_iter->viewer_connection.get(); |
4164020e | 739 | |
0f5c5d5c | 740 | BT_CPPLOGI_SPEC(viewer_connection->logger, "Getting {} new streams", stream_count); |
4164020e SM |
741 | for (i = 0; i < stream_count; i++) { |
742 | struct lttng_viewer_stream stream; | |
743 | struct lttng_live_stream_iterator *live_stream; | |
744 | uint64_t stream_id; | |
745 | uint64_t ctf_trace_id; | |
746 | ||
747 | status = lttng_live_recv(viewer_connection, &stream, sizeof(stream)); | |
748 | if (status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 749 | viewer_handle_recv_status(status, "stream reply"); |
a97176ef | 750 | return status; |
4164020e SM |
751 | } |
752 | stream.path_name[LTTNG_VIEWER_PATH_MAX - 1] = '\0'; | |
753 | stream.channel_name[LTTNG_VIEWER_NAME_MAX - 1] = '\0'; | |
754 | stream_id = be64toh(stream.id); | |
755 | ctf_trace_id = be64toh(stream.ctf_trace_id); | |
756 | ||
757 | if (stream.metadata_flag) { | |
0f5c5d5c SM |
758 | BT_CPPLOGI_SPEC(viewer_connection->logger, " metadata stream {} : {}/{}", stream_id, |
759 | stream.path_name, stream.channel_name); | |
44bd6303 | 760 | if (lttng_live_metadata_create_stream(session, ctf_trace_id, stream_id)) { |
0f5c5d5c SM |
761 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
762 | "Error creating metadata stream"); | |
a97176ef | 763 | return LTTNG_LIVE_VIEWER_STATUS_ERROR; |
4164020e SM |
764 | } |
765 | session->lazy_stream_msg_init = true; | |
766 | } else { | |
0f5c5d5c SM |
767 | BT_CPPLOGI_SPEC(viewer_connection->logger, " stream {} : {}/{}", stream_id, |
768 | stream.path_name, stream.channel_name); | |
81c7f242 | 769 | live_stream = lttng_live_stream_iterator_create(session, ctf_trace_id, stream_id); |
4164020e | 770 | if (!live_stream) { |
0f5c5d5c | 771 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Error creating stream"); |
a97176ef | 772 | return LTTNG_LIVE_VIEWER_STATUS_ERROR; |
4164020e SM |
773 | } |
774 | } | |
775 | } | |
7cdc2bab | 776 | |
a97176ef | 777 | return LTTNG_LIVE_VIEWER_STATUS_OK; |
7cdc2bab MD |
778 | } |
779 | ||
81c7f242 | 780 | enum lttng_live_viewer_status lttng_live_session_attach(struct lttng_live_session *session) |
7cdc2bab | 781 | { |
4164020e SM |
782 | struct lttng_viewer_cmd cmd; |
783 | enum lttng_live_viewer_status status; | |
784 | struct lttng_viewer_attach_session_request rq; | |
785 | struct lttng_viewer_attach_session_response rp; | |
786 | struct lttng_live_msg_iter *lttng_live_msg_iter = session->lttng_live_msg_iter; | |
d721bef8 | 787 | live_viewer_connection *viewer_connection = lttng_live_msg_iter->viewer_connection.get(); |
4164020e SM |
788 | uint64_t session_id = session->id; |
789 | uint32_t streams_count; | |
790 | const size_t cmd_buf_len = sizeof(cmd) + sizeof(rq); | |
791 | char cmd_buf[cmd_buf_len]; | |
792 | ||
0f5c5d5c SM |
793 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
794 | "Attaching to session: cmd={}, session-id={}, seek={}", | |
795 | LTTNG_VIEWER_ATTACH_SESSION, session_id, LTTNG_VIEWER_SEEK_LAST); | |
4164020e SM |
796 | |
797 | cmd.cmd = htobe32(LTTNG_VIEWER_ATTACH_SESSION); | |
798 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); | |
799 | cmd.cmd_version = htobe32(0); | |
800 | ||
801 | memset(&rq, 0, sizeof(rq)); | |
802 | rq.session_id = htobe64(session_id); | |
803 | // TODO: add cmd line parameter to select seek beginning | |
804 | // rq.seek = htobe32(LTTNG_VIEWER_SEEK_BEGINNING); | |
805 | rq.seek = htobe32(LTTNG_VIEWER_SEEK_LAST); | |
806 | ||
807 | /* | |
808 | * Merge the cmd and connection request to prevent a write-write | |
809 | * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the | |
810 | * second write to be performed quickly in presence of Nagle's algorithm. | |
811 | */ | |
812 | memcpy(cmd_buf, &cmd, sizeof(cmd)); | |
813 | memcpy(cmd_buf + sizeof(cmd), &rq, sizeof(rq)); | |
814 | status = lttng_live_send(viewer_connection, &cmd_buf, cmd_buf_len); | |
815 | if (status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 816 | viewer_handle_send_status(status, "attach session command"); |
a97176ef | 817 | return status; |
4164020e SM |
818 | } |
819 | ||
820 | status = lttng_live_recv(viewer_connection, &rp, sizeof(rp)); | |
821 | if (status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 822 | viewer_handle_recv_status(status, "attach session reply"); |
a97176ef | 823 | return status; |
4164020e SM |
824 | } |
825 | ||
826 | streams_count = be32toh(rp.streams_count); | |
827 | switch (be32toh(rp.status)) { | |
828 | case LTTNG_VIEWER_ATTACH_OK: | |
829 | break; | |
830 | case LTTNG_VIEWER_ATTACH_UNK: | |
0f5c5d5c SM |
831 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Session id {} is unknown", |
832 | session_id); | |
a97176ef | 833 | return LTTNG_LIVE_VIEWER_STATUS_ERROR; |
4164020e | 834 | case LTTNG_VIEWER_ATTACH_ALREADY: |
0f5c5d5c SM |
835 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
836 | "There is already a viewer attached to this session"); | |
a97176ef | 837 | return LTTNG_LIVE_VIEWER_STATUS_ERROR; |
4164020e | 838 | case LTTNG_VIEWER_ATTACH_NOT_LIVE: |
0f5c5d5c | 839 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Not a live session"); |
a97176ef | 840 | return LTTNG_LIVE_VIEWER_STATUS_ERROR; |
4164020e | 841 | case LTTNG_VIEWER_ATTACH_SEEK_ERR: |
0f5c5d5c | 842 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Wrong seek parameter"); |
a97176ef | 843 | return LTTNG_LIVE_VIEWER_STATUS_ERROR; |
4164020e | 844 | default: |
0f5c5d5c SM |
845 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Unknown attach return code {}", |
846 | be32toh(rp.status)); | |
a97176ef | 847 | return LTTNG_LIVE_VIEWER_STATUS_ERROR; |
4164020e SM |
848 | } |
849 | ||
850 | /* We receive the initial list of streams. */ | |
81c7f242 | 851 | status = receive_streams(session, streams_count); |
4164020e SM |
852 | switch (status) { |
853 | case LTTNG_LIVE_VIEWER_STATUS_OK: | |
854 | break; | |
855 | case LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED: | |
a97176ef | 856 | return status; |
4164020e | 857 | case LTTNG_LIVE_VIEWER_STATUS_ERROR: |
0f5c5d5c | 858 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Error receiving streams"); |
a97176ef | 859 | return status; |
4164020e SM |
860 | default: |
861 | bt_common_abort(); | |
862 | } | |
863 | ||
864 | session->attached = true; | |
865 | session->new_streams_needed = false; | |
7cdc2bab | 866 | |
a97176ef | 867 | return LTTNG_LIVE_VIEWER_STATUS_OK; |
7cdc2bab MD |
868 | } |
869 | ||
4164020e | 870 | enum lttng_live_viewer_status lttng_live_session_detach(struct lttng_live_session *session) |
7cdc2bab | 871 | { |
4164020e SM |
872 | struct lttng_viewer_cmd cmd; |
873 | enum lttng_live_viewer_status status; | |
874 | struct lttng_viewer_detach_session_request rq; | |
875 | struct lttng_viewer_detach_session_response rp; | |
876 | struct lttng_live_msg_iter *lttng_live_msg_iter = session->lttng_live_msg_iter; | |
d721bef8 | 877 | live_viewer_connection *viewer_connection = lttng_live_msg_iter->viewer_connection.get(); |
4164020e SM |
878 | uint64_t session_id = session->id; |
879 | const size_t cmd_buf_len = sizeof(cmd) + sizeof(rq); | |
880 | char cmd_buf[cmd_buf_len]; | |
881 | ||
882 | /* | |
883 | * The session might already be detached and the viewer socket might | |
884 | * already been closed. This happens when calling this function when | |
885 | * tearing down the graph after an error. | |
886 | */ | |
887 | if (!session->attached || viewer_connection->control_sock == BT_INVALID_SOCKET) { | |
888 | return LTTNG_LIVE_VIEWER_STATUS_OK; | |
889 | } | |
890 | ||
0f5c5d5c SM |
891 | BT_CPPLOGD_SPEC(viewer_connection->logger, "Detaching from session: cmd={}, session-id={}", |
892 | LTTNG_VIEWER_DETACH_SESSION, session_id); | |
4164020e SM |
893 | |
894 | cmd.cmd = htobe32(LTTNG_VIEWER_DETACH_SESSION); | |
895 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); | |
896 | cmd.cmd_version = htobe32(0); | |
897 | ||
898 | memset(&rq, 0, sizeof(rq)); | |
899 | rq.session_id = htobe64(session_id); | |
900 | ||
901 | /* | |
902 | * Merge the cmd and connection request to prevent a write-write | |
903 | * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the | |
904 | * second write to be performed quickly in presence of Nagle's algorithm. | |
905 | */ | |
906 | memcpy(cmd_buf, &cmd, sizeof(cmd)); | |
907 | memcpy(cmd_buf + sizeof(cmd), &rq, sizeof(rq)); | |
908 | status = lttng_live_send(viewer_connection, &cmd_buf, cmd_buf_len); | |
909 | if (status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 910 | viewer_handle_send_status(status, "detach session command"); |
a97176ef | 911 | return status; |
4164020e SM |
912 | } |
913 | ||
914 | status = lttng_live_recv(viewer_connection, &rp, sizeof(rp)); | |
915 | if (status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 916 | viewer_handle_recv_status(status, "detach session reply"); |
a97176ef | 917 | return status; |
4164020e SM |
918 | } |
919 | ||
920 | switch (be32toh(rp.status)) { | |
921 | case LTTNG_VIEWER_DETACH_SESSION_OK: | |
922 | break; | |
923 | case LTTNG_VIEWER_DETACH_SESSION_UNK: | |
0f5c5d5c | 924 | BT_CPPLOGW_SPEC(viewer_connection->logger, "Session id {} is unknown", session_id); |
a97176ef | 925 | return LTTNG_LIVE_VIEWER_STATUS_ERROR; |
4164020e | 926 | case LTTNG_VIEWER_DETACH_SESSION_ERR: |
0f5c5d5c | 927 | BT_CPPLOGW_SPEC(viewer_connection->logger, "Error detaching session id {}", session_id); |
a97176ef | 928 | return LTTNG_LIVE_VIEWER_STATUS_ERROR; |
4164020e | 929 | default: |
0f5c5d5c SM |
930 | BT_CPPLOGE_SPEC(viewer_connection->logger, "Unknown detach return code {}", |
931 | be32toh(rp.status)); | |
a97176ef | 932 | return LTTNG_LIVE_VIEWER_STATUS_ERROR; |
4164020e SM |
933 | } |
934 | ||
935 | session->attached = false; | |
936 | ||
a97176ef | 937 | return LTTNG_LIVE_VIEWER_STATUS_OK; |
7cdc2bab MD |
938 | } |
939 | ||
4164020e | 940 | enum lttng_live_get_one_metadata_status |
81c7f242 | 941 | lttng_live_get_one_metadata_packet(struct lttng_live_trace *trace, std::vector<uint8_t>& buf) |
7cdc2bab | 942 | { |
4164020e | 943 | uint64_t len = 0; |
4164020e SM |
944 | enum lttng_live_viewer_status viewer_status; |
945 | struct lttng_viewer_cmd cmd; | |
946 | struct lttng_viewer_get_metadata rq; | |
947 | struct lttng_viewer_metadata_packet rp; | |
4164020e SM |
948 | struct lttng_live_session *session = trace->session; |
949 | struct lttng_live_msg_iter *lttng_live_msg_iter = session->lttng_live_msg_iter; | |
e66be7c3 | 950 | struct lttng_live_metadata *metadata = trace->metadata.get(); |
d721bef8 | 951 | live_viewer_connection *viewer_connection = lttng_live_msg_iter->viewer_connection.get(); |
4164020e SM |
952 | const size_t cmd_buf_len = sizeof(cmd) + sizeof(rq); |
953 | char cmd_buf[cmd_buf_len]; | |
954 | ||
0f5c5d5c SM |
955 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
956 | "Requesting new metadata for trace:" | |
957 | "cmd={}, trace-id={}, metadata-stream-id={}", | |
958 | LTTNG_VIEWER_GET_METADATA, trace->id, metadata->stream_id); | |
4164020e SM |
959 | |
960 | rq.stream_id = htobe64(metadata->stream_id); | |
961 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_METADATA); | |
962 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); | |
963 | cmd.cmd_version = htobe32(0); | |
964 | ||
965 | /* | |
966 | * Merge the cmd and connection request to prevent a write-write | |
967 | * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the | |
968 | * second write to be performed quickly in presence of Nagle's algorithm. | |
969 | */ | |
970 | memcpy(cmd_buf, &cmd, sizeof(cmd)); | |
971 | memcpy(cmd_buf + sizeof(cmd), &rq, sizeof(rq)); | |
972 | viewer_status = lttng_live_send(viewer_connection, &cmd_buf, cmd_buf_len); | |
973 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 974 | viewer_handle_send_status(viewer_status, "get metadata command"); |
a97176ef | 975 | return (lttng_live_get_one_metadata_status) viewer_status; |
4164020e SM |
976 | } |
977 | ||
978 | viewer_status = lttng_live_recv(viewer_connection, &rp, sizeof(rp)); | |
979 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 980 | viewer_handle_recv_status(viewer_status, "get metadata reply"); |
a97176ef | 981 | return (lttng_live_get_one_metadata_status) viewer_status; |
4164020e SM |
982 | } |
983 | ||
984 | switch (be32toh(rp.status)) { | |
985 | case LTTNG_VIEWER_METADATA_OK: | |
0f5c5d5c | 986 | BT_CPPLOGD_SPEC(viewer_connection->logger, "Received get_metadata response: ok"); |
4164020e SM |
987 | break; |
988 | case LTTNG_VIEWER_NO_NEW_METADATA: | |
0f5c5d5c | 989 | BT_CPPLOGD_SPEC(viewer_connection->logger, "Received get_metadata response: no new"); |
a97176ef | 990 | return LTTNG_LIVE_GET_ONE_METADATA_STATUS_END; |
4164020e SM |
991 | case LTTNG_VIEWER_METADATA_ERR: |
992 | /* | |
993 | * The Relayd cannot find this stream id. Maybe its | |
994 | * gone already. This can happen in short lived UST app | |
995 | * in a per-pid session. | |
996 | */ | |
0f5c5d5c | 997 | BT_CPPLOGD_SPEC(viewer_connection->logger, "Received get_metadata response: error"); |
a97176ef | 998 | return LTTNG_LIVE_GET_ONE_METADATA_STATUS_CLOSED; |
4164020e | 999 | default: |
0f5c5d5c SM |
1000 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
1001 | "Received get_metadata response: unknown"); | |
a97176ef | 1002 | return LTTNG_LIVE_GET_ONE_METADATA_STATUS_ERROR; |
4164020e SM |
1003 | } |
1004 | ||
1005 | len = be64toh(rp.len); | |
c5ce3927 FD |
1006 | if (len == 0) { |
1007 | /* | |
1008 | * We received a `LTTNG_VIEWER_METADATA_OK` with a packet | |
1009 | * length of 0. This means we must try again. This scenario | |
1010 | * arises when a clear command is performed on an lttng session. | |
1011 | */ | |
0f5c5d5c SM |
1012 | BT_CPPLOGD_SPEC( |
1013 | viewer_connection->logger, | |
c5ce3927 | 1014 | "Expecting a metadata packet of size 0. Retry to get a packet from the relay."); |
a97176ef | 1015 | return LTTNG_LIVE_GET_ONE_METADATA_STATUS_OK; |
c5ce3927 FD |
1016 | } |
1017 | ||
0f5c5d5c | 1018 | BT_CPPLOGD_SPEC(viewer_connection->logger, "Writing {} bytes to metadata", len); |
4164020e | 1019 | if (len <= 0) { |
0f5c5d5c | 1020 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Erroneous response length"); |
a97176ef | 1021 | return LTTNG_LIVE_GET_ONE_METADATA_STATUS_ERROR; |
4164020e SM |
1022 | } |
1023 | ||
81c7f242 | 1024 | std::vector<char> localBuf(len); |
4164020e | 1025 | |
81c7f242 | 1026 | viewer_status = lttng_live_recv(viewer_connection, localBuf.data(), len); |
4164020e | 1027 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { |
0f5c5d5c | 1028 | viewer_handle_recv_status(viewer_status, "get metadata packet"); |
a97176ef | 1029 | return (lttng_live_get_one_metadata_status) viewer_status; |
4164020e SM |
1030 | } |
1031 | ||
81c7f242 | 1032 | buf.insert(buf.end(), localBuf.begin(), localBuf.end()); |
4164020e | 1033 | |
a97176ef | 1034 | return LTTNG_LIVE_GET_ONE_METADATA_STATUS_OK; |
7cdc2bab MD |
1035 | } |
1036 | ||
1037 | /* | |
1038 | * Assign the fields from a lttng_viewer_index to a packet_index. | |
1039 | */ | |
4164020e SM |
1040 | static void lttng_index_to_packet_index(struct lttng_viewer_index *lindex, |
1041 | struct packet_index *pindex) | |
7cdc2bab | 1042 | { |
4164020e SM |
1043 | BT_ASSERT(lindex); |
1044 | BT_ASSERT(pindex); | |
1045 | ||
1046 | pindex->offset = be64toh(lindex->offset); | |
1047 | pindex->packet_size = be64toh(lindex->packet_size); | |
1048 | pindex->content_size = be64toh(lindex->content_size); | |
1049 | pindex->ts_cycles.timestamp_begin = be64toh(lindex->timestamp_begin); | |
1050 | pindex->ts_cycles.timestamp_end = be64toh(lindex->timestamp_end); | |
1051 | pindex->events_discarded = be64toh(lindex->events_discarded); | |
7cdc2bab MD |
1052 | } |
1053 | ||
4164020e | 1054 | static void lttng_live_need_new_streams(struct lttng_live_msg_iter *lttng_live_msg_iter) |
36e94ad6 | 1055 | { |
751aaa62 | 1056 | for (const auto& session : lttng_live_msg_iter->sessions) { |
0f5c5d5c SM |
1057 | BT_CPPLOGD_SPEC(lttng_live_msg_iter->logger, |
1058 | "Marking session as needing new streams: " | |
1059 | "session-id={}", | |
1060 | session->id); | |
4164020e SM |
1061 | session->new_streams_needed = true; |
1062 | } | |
36e94ad6 FD |
1063 | } |
1064 | ||
4164020e SM |
1065 | enum lttng_live_iterator_status |
1066 | lttng_live_get_next_index(struct lttng_live_msg_iter *lttng_live_msg_iter, | |
1067 | struct lttng_live_stream_iterator *stream, struct packet_index *index) | |
7cdc2bab | 1068 | { |
4164020e SM |
1069 | struct lttng_viewer_cmd cmd; |
1070 | struct lttng_viewer_get_next_index rq; | |
1071 | enum lttng_live_viewer_status viewer_status; | |
1072 | struct lttng_viewer_index rp; | |
d721bef8 | 1073 | live_viewer_connection *viewer_connection = lttng_live_msg_iter->viewer_connection.get(); |
4164020e SM |
1074 | struct lttng_live_trace *trace = stream->trace; |
1075 | const size_t cmd_buf_len = sizeof(cmd) + sizeof(rq); | |
1076 | char cmd_buf[cmd_buf_len]; | |
1077 | uint32_t flags, rp_status; | |
1078 | ||
0f5c5d5c SM |
1079 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
1080 | "Requesting next index for stream: cmd={}, " | |
1081 | "viewer-stream-id={}", | |
1082 | LTTNG_VIEWER_GET_NEXT_INDEX, stream->viewer_stream_id); | |
4164020e SM |
1083 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_NEXT_INDEX); |
1084 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); | |
1085 | cmd.cmd_version = htobe32(0); | |
1086 | ||
1087 | memset(&rq, 0, sizeof(rq)); | |
1088 | rq.stream_id = htobe64(stream->viewer_stream_id); | |
1089 | ||
1090 | /* | |
1091 | * Merge the cmd and connection request to prevent a write-write | |
1092 | * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the | |
1093 | * second write to be performed quickly in presence of Nagle's algorithm. | |
1094 | */ | |
1095 | memcpy(cmd_buf, &cmd, sizeof(cmd)); | |
1096 | memcpy(cmd_buf + sizeof(cmd), &rq, sizeof(rq)); | |
1097 | ||
1098 | viewer_status = lttng_live_send(viewer_connection, &cmd_buf, cmd_buf_len); | |
1099 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 1100 | viewer_handle_send_status(viewer_status, "get next index command"); |
a97176ef | 1101 | return viewer_status_to_live_iterator_status(viewer_status); |
4164020e SM |
1102 | } |
1103 | ||
1104 | viewer_status = lttng_live_recv(viewer_connection, &rp, sizeof(rp)); | |
1105 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 1106 | viewer_handle_recv_status(viewer_status, "get next index reply"); |
a97176ef | 1107 | return viewer_status_to_live_iterator_status(viewer_status); |
4164020e SM |
1108 | } |
1109 | ||
1110 | flags = be32toh(rp.flags); | |
1111 | rp_status = be32toh(rp.status); | |
1112 | ||
0f5c5d5c SM |
1113 | BT_CPPLOGD_SPEC( |
1114 | viewer_connection->logger, "Received response from relay daemon: cmd=%s, response={}", | |
1115 | LTTNG_VIEWER_GET_NEXT_INDEX, static_cast<lttng_viewer_next_index_return_code>(rp_status)); | |
ca622546 JG |
1116 | |
1117 | if (flags & LTTNG_VIEWER_FLAG_NEW_STREAM) { | |
0f5c5d5c SM |
1118 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
1119 | "Marking all sessions as possibly needing new streams: " | |
1120 | "response={}, response-flag=NEW_STREAM", | |
1121 | static_cast<lttng_viewer_next_index_return_code>(rp_status)); | |
ca622546 JG |
1122 | lttng_live_need_new_streams(lttng_live_msg_iter); |
1123 | } | |
1124 | ||
4164020e SM |
1125 | switch (rp_status) { |
1126 | case LTTNG_VIEWER_INDEX_INACTIVE: | |
1127 | { | |
1128 | uint64_t ctf_stream_class_id; | |
1129 | ||
1130 | memset(index, 0, sizeof(struct packet_index)); | |
1131 | index->ts_cycles.timestamp_end = be64toh(rp.timestamp_end); | |
1132 | stream->current_inactivity_ts = index->ts_cycles.timestamp_end; | |
1133 | ctf_stream_class_id = be64toh(rp.stream_id); | |
1134 | if (stream->ctf_stream_class_id.is_set) { | |
1135 | BT_ASSERT(stream->ctf_stream_class_id.value == ctf_stream_class_id); | |
1136 | } else { | |
1137 | stream->ctf_stream_class_id.value = ctf_stream_class_id; | |
1138 | stream->ctf_stream_class_id.is_set = true; | |
1139 | } | |
1140 | lttng_live_stream_iterator_set_state(stream, LTTNG_LIVE_STREAM_QUIESCENT); | |
a97176ef | 1141 | return LTTNG_LIVE_ITERATOR_STATUS_OK; |
4164020e SM |
1142 | } |
1143 | case LTTNG_VIEWER_INDEX_OK: | |
1144 | { | |
1145 | uint64_t ctf_stream_class_id; | |
1146 | ||
1147 | lttng_index_to_packet_index(&rp, index); | |
1148 | ctf_stream_class_id = be64toh(rp.stream_id); | |
1149 | if (stream->ctf_stream_class_id.is_set) { | |
1150 | BT_ASSERT(stream->ctf_stream_class_id.value == ctf_stream_class_id); | |
1151 | } else { | |
1152 | stream->ctf_stream_class_id.value = ctf_stream_class_id; | |
1153 | stream->ctf_stream_class_id.is_set = true; | |
1154 | } | |
4164020e SM |
1155 | lttng_live_stream_iterator_set_state(stream, LTTNG_LIVE_STREAM_ACTIVE_DATA); |
1156 | ||
1157 | if (flags & LTTNG_VIEWER_FLAG_NEW_METADATA) { | |
0f5c5d5c SM |
1158 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
1159 | "Marking trace as needing new metadata: " | |
1160 | "response={}, response-flag=NEW_METADATA, trace-id={}", | |
1161 | static_cast<lttng_viewer_next_index_return_code>(rp_status), trace->id); | |
4164020e SM |
1162 | trace->metadata_stream_state = LTTNG_LIVE_METADATA_STREAM_STATE_NEEDED; |
1163 | } | |
a97176ef | 1164 | return LTTNG_LIVE_ITERATOR_STATUS_OK; |
4164020e SM |
1165 | break; |
1166 | } | |
1167 | case LTTNG_VIEWER_INDEX_RETRY: | |
1168 | memset(index, 0, sizeof(struct packet_index)); | |
1169 | lttng_live_stream_iterator_set_state(stream, LTTNG_LIVE_STREAM_ACTIVE_NO_DATA); | |
a97176ef | 1170 | return LTTNG_LIVE_ITERATOR_STATUS_AGAIN; |
4164020e SM |
1171 | case LTTNG_VIEWER_INDEX_HUP: |
1172 | memset(index, 0, sizeof(struct packet_index)); | |
1173 | index->offset = EOF; | |
1174 | lttng_live_stream_iterator_set_state(stream, LTTNG_LIVE_STREAM_EOF); | |
1175 | stream->has_stream_hung_up = true; | |
a97176ef | 1176 | return LTTNG_LIVE_ITERATOR_STATUS_END; |
4164020e SM |
1177 | case LTTNG_VIEWER_INDEX_ERR: |
1178 | memset(index, 0, sizeof(struct packet_index)); | |
1179 | lttng_live_stream_iterator_set_state(stream, LTTNG_LIVE_STREAM_ACTIVE_NO_DATA); | |
a97176ef | 1180 | return LTTNG_LIVE_ITERATOR_STATUS_ERROR; |
4164020e | 1181 | default: |
0f5c5d5c SM |
1182 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
1183 | "Received get_next_index response: unknown value"); | |
4164020e SM |
1184 | memset(index, 0, sizeof(struct packet_index)); |
1185 | lttng_live_stream_iterator_set_state(stream, LTTNG_LIVE_STREAM_ACTIVE_NO_DATA); | |
a97176ef | 1186 | return LTTNG_LIVE_ITERATOR_STATUS_ERROR; |
4164020e | 1187 | } |
7cdc2bab MD |
1188 | } |
1189 | ||
81c7f242 | 1190 | lttng_live_get_stream_bytes_status |
4164020e SM |
1191 | lttng_live_get_stream_bytes(struct lttng_live_msg_iter *lttng_live_msg_iter, |
1192 | struct lttng_live_stream_iterator *stream, uint8_t *buf, | |
1193 | uint64_t offset, uint64_t req_len, uint64_t *recv_len) | |
7cdc2bab | 1194 | { |
4164020e SM |
1195 | enum lttng_live_viewer_status viewer_status; |
1196 | struct lttng_viewer_trace_packet rp; | |
1197 | struct lttng_viewer_cmd cmd; | |
1198 | struct lttng_viewer_get_packet rq; | |
d721bef8 | 1199 | live_viewer_connection *viewer_connection = lttng_live_msg_iter->viewer_connection.get(); |
4164020e SM |
1200 | struct lttng_live_trace *trace = stream->trace; |
1201 | const size_t cmd_buf_len = sizeof(cmd) + sizeof(rq); | |
1202 | char cmd_buf[cmd_buf_len]; | |
1203 | uint32_t flags, rp_status; | |
1204 | ||
0f5c5d5c SM |
1205 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
1206 | "Requesting data from stream: cmd={}, " | |
1207 | "offset={}, request-len={}", | |
1208 | LTTNG_VIEWER_GET_PACKET, offset, req_len); | |
4164020e SM |
1209 | |
1210 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_PACKET); | |
1211 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); | |
1212 | cmd.cmd_version = htobe32(0); | |
1213 | ||
1214 | memset(&rq, 0, sizeof(rq)); | |
1215 | rq.stream_id = htobe64(stream->viewer_stream_id); | |
1216 | rq.offset = htobe64(offset); | |
1217 | rq.len = htobe32(req_len); | |
1218 | ||
1219 | /* | |
1220 | * Merge the cmd and connection request to prevent a write-write | |
1221 | * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the | |
1222 | * second write to be performed quickly in presence of Nagle's algorithm. | |
1223 | */ | |
1224 | memcpy(cmd_buf, &cmd, sizeof(cmd)); | |
1225 | memcpy(cmd_buf + sizeof(cmd), &rq, sizeof(rq)); | |
1226 | ||
1227 | viewer_status = lttng_live_send(viewer_connection, &cmd_buf, cmd_buf_len); | |
1228 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 1229 | viewer_handle_send_status(viewer_status, "get data packet command"); |
81c7f242 | 1230 | return viewer_status_to_lttng_live_get_stream_bytes_status(viewer_status); |
4164020e SM |
1231 | } |
1232 | ||
1233 | viewer_status = lttng_live_recv(viewer_connection, &rp, sizeof(rp)); | |
1234 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 1235 | viewer_handle_recv_status(viewer_status, "get data packet reply"); |
81c7f242 | 1236 | return viewer_status_to_lttng_live_get_stream_bytes_status(viewer_status); |
4164020e SM |
1237 | } |
1238 | ||
1239 | flags = be32toh(rp.flags); | |
1240 | rp_status = be32toh(rp.status); | |
1241 | ||
0f5c5d5c SM |
1242 | BT_CPPLOGD_SPEC( |
1243 | viewer_connection->logger, "Received response from relay daemon: cmd={}, response={}", | |
1244 | LTTNG_VIEWER_GET_PACKET, static_cast<lttng_viewer_get_packet_return_code>(rp_status)); | |
4164020e SM |
1245 | switch (rp_status) { |
1246 | case LTTNG_VIEWER_GET_PACKET_OK: | |
1247 | req_len = be32toh(rp.len); | |
0f5c5d5c SM |
1248 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
1249 | "Got packet from relay daemon: response={}, packet-len={}", | |
1250 | static_cast<lttng_viewer_get_packet_return_code>(rp_status), req_len); | |
4164020e SM |
1251 | break; |
1252 | case LTTNG_VIEWER_GET_PACKET_RETRY: | |
1253 | /* Unimplemented by relay daemon */ | |
81c7f242 | 1254 | return LTTNG_LIVE_GET_STREAM_BYTES_STATUS_AGAIN; |
4164020e SM |
1255 | case LTTNG_VIEWER_GET_PACKET_ERR: |
1256 | if (flags & LTTNG_VIEWER_FLAG_NEW_METADATA) { | |
0f5c5d5c SM |
1257 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
1258 | "Marking trace as needing new metadata: " | |
1259 | "response={}, response-flag=NEW_METADATA, trace-id={}", | |
1260 | static_cast<lttng_viewer_get_packet_return_code>(rp_status), trace->id); | |
4164020e SM |
1261 | trace->metadata_stream_state = LTTNG_LIVE_METADATA_STREAM_STATE_NEEDED; |
1262 | } | |
1263 | if (flags & LTTNG_VIEWER_FLAG_NEW_STREAM) { | |
0f5c5d5c SM |
1264 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
1265 | "Marking all sessions as possibly needing new streams: " | |
1266 | "response={}, response-flag=NEW_STREAM", | |
1267 | static_cast<lttng_viewer_get_packet_return_code>(rp_status)); | |
4164020e SM |
1268 | lttng_live_need_new_streams(lttng_live_msg_iter); |
1269 | } | |
1270 | if (flags & (LTTNG_VIEWER_FLAG_NEW_METADATA | LTTNG_VIEWER_FLAG_NEW_STREAM)) { | |
0f5c5d5c SM |
1271 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
1272 | "Reply with any one flags set means we should retry: response={}", | |
1273 | static_cast<lttng_viewer_get_packet_return_code>(rp_status)); | |
81c7f242 | 1274 | return LTTNG_LIVE_GET_STREAM_BYTES_STATUS_AGAIN; |
4164020e | 1275 | } |
0f5c5d5c SM |
1276 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
1277 | "Received get_data_packet response: error"); | |
81c7f242 | 1278 | return LTTNG_LIVE_GET_STREAM_BYTES_STATUS_ERROR; |
4164020e | 1279 | case LTTNG_VIEWER_GET_PACKET_EOF: |
81c7f242 | 1280 | return LTTNG_LIVE_GET_STREAM_BYTES_STATUS_EOF; |
4164020e | 1281 | default: |
0f5c5d5c SM |
1282 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
1283 | "Received get_data_packet response: unknown ({})", rp_status); | |
81c7f242 | 1284 | return LTTNG_LIVE_GET_STREAM_BYTES_STATUS_ERROR; |
4164020e SM |
1285 | } |
1286 | ||
1287 | if (req_len == 0) { | |
81c7f242 | 1288 | return LTTNG_LIVE_GET_STREAM_BYTES_STATUS_ERROR; |
4164020e SM |
1289 | } |
1290 | ||
1291 | viewer_status = lttng_live_recv(viewer_connection, buf, req_len); | |
1292 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 1293 | viewer_handle_recv_status(viewer_status, "get data packet"); |
81c7f242 | 1294 | return viewer_status_to_lttng_live_get_stream_bytes_status(viewer_status); |
4164020e SM |
1295 | } |
1296 | *recv_len = req_len; | |
1297 | ||
81c7f242 | 1298 | return LTTNG_LIVE_GET_STREAM_BYTES_STATUS_OK; |
7cdc2bab MD |
1299 | } |
1300 | ||
1301 | /* | |
1302 | * Request new streams for a session. | |
1303 | */ | |
4164020e | 1304 | enum lttng_live_iterator_status |
81c7f242 | 1305 | lttng_live_session_get_new_streams(struct lttng_live_session *session) |
7cdc2bab | 1306 | { |
4164020e SM |
1307 | struct lttng_viewer_cmd cmd; |
1308 | struct lttng_viewer_new_streams_request rq; | |
1309 | struct lttng_viewer_new_streams_response rp; | |
1310 | struct lttng_live_msg_iter *lttng_live_msg_iter = session->lttng_live_msg_iter; | |
1311 | enum lttng_live_viewer_status viewer_status; | |
d721bef8 | 1312 | live_viewer_connection *viewer_connection = lttng_live_msg_iter->viewer_connection.get(); |
4164020e SM |
1313 | uint32_t streams_count; |
1314 | const size_t cmd_buf_len = sizeof(cmd) + sizeof(rq); | |
1315 | char cmd_buf[cmd_buf_len]; | |
1316 | ||
1317 | if (!session->new_streams_needed) { | |
a97176ef | 1318 | return LTTNG_LIVE_ITERATOR_STATUS_OK; |
4164020e SM |
1319 | } |
1320 | ||
0f5c5d5c SM |
1321 | BT_CPPLOGD_SPEC(viewer_connection->logger, |
1322 | "Requesting new streams for session: cmd={}, session-id={}", | |
1323 | LTTNG_VIEWER_GET_NEW_STREAMS, session->id); | |
4164020e SM |
1324 | |
1325 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_NEW_STREAMS); | |
1326 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); | |
1327 | cmd.cmd_version = htobe32(0); | |
1328 | ||
1329 | memset(&rq, 0, sizeof(rq)); | |
1330 | rq.session_id = htobe64(session->id); | |
1331 | ||
1332 | /* | |
1333 | * Merge the cmd and connection request to prevent a write-write | |
1334 | * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the | |
1335 | * second write to be performed quickly in presence of Nagle's algorithm. | |
1336 | */ | |
1337 | memcpy(cmd_buf, &cmd, sizeof(cmd)); | |
1338 | memcpy(cmd_buf + sizeof(cmd), &rq, sizeof(rq)); | |
1339 | ||
1340 | viewer_status = lttng_live_send(viewer_connection, &cmd_buf, cmd_buf_len); | |
1341 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 1342 | viewer_handle_send_status(viewer_status, "get new streams command"); |
a97176ef | 1343 | return viewer_status_to_live_iterator_status(viewer_status); |
4164020e SM |
1344 | } |
1345 | ||
1346 | viewer_status = lttng_live_recv(viewer_connection, &rp, sizeof(rp)); | |
1347 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
0f5c5d5c | 1348 | viewer_handle_recv_status(viewer_status, "get new streams reply"); |
a97176ef | 1349 | return viewer_status_to_live_iterator_status(viewer_status); |
4164020e SM |
1350 | } |
1351 | ||
1352 | streams_count = be32toh(rp.streams_count); | |
1353 | ||
1354 | switch (be32toh(rp.status)) { | |
1355 | case LTTNG_VIEWER_NEW_STREAMS_OK: | |
1356 | session->new_streams_needed = false; | |
1357 | break; | |
1358 | case LTTNG_VIEWER_NEW_STREAMS_NO_NEW: | |
1359 | session->new_streams_needed = false; | |
a97176ef | 1360 | return LTTNG_LIVE_ITERATOR_STATUS_OK; |
4164020e SM |
1361 | case LTTNG_VIEWER_NEW_STREAMS_HUP: |
1362 | session->new_streams_needed = false; | |
1363 | session->closed = true; | |
a97176ef | 1364 | return LTTNG_LIVE_ITERATOR_STATUS_END; |
4164020e | 1365 | case LTTNG_VIEWER_NEW_STREAMS_ERR: |
0f5c5d5c | 1366 | BT_CPPLOGD_SPEC(viewer_connection->logger, "Received get_new_streams response: error"); |
a97176ef | 1367 | return LTTNG_LIVE_ITERATOR_STATUS_ERROR; |
4164020e | 1368 | default: |
0f5c5d5c | 1369 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
a97176ef | 1370 | "Received get_new_streams response: Unknown return code {}", |
0f5c5d5c | 1371 | be32toh(rp.status)); |
a97176ef | 1372 | return LTTNG_LIVE_ITERATOR_STATUS_ERROR; |
4164020e SM |
1373 | } |
1374 | ||
81c7f242 | 1375 | viewer_status = receive_streams(session, streams_count); |
4164020e | 1376 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { |
0f5c5d5c | 1377 | viewer_handle_recv_status(viewer_status, "new streams"); |
a97176ef | 1378 | return viewer_status_to_live_iterator_status(viewer_status); |
4164020e SM |
1379 | } |
1380 | ||
a97176ef | 1381 | return LTTNG_LIVE_ITERATOR_STATUS_OK; |
7cdc2bab MD |
1382 | } |
1383 | ||
d721bef8 SM |
1384 | enum lttng_live_viewer_status |
1385 | live_viewer_connection_create(const char *url, bool in_query, | |
1386 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
1387 | const bt2c::Logger& parentLogger, live_viewer_connection::UP& viewer) | |
7cdc2bab | 1388 | { |
d721bef8 | 1389 | auto viewer_connection = bt2s::make_unique<live_viewer_connection>(parentLogger); |
4164020e | 1390 | |
0f5c5d5c SM |
1391 | if (bt_socket_init(viewer_connection->logger) != 0) { |
1392 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, "Failed to init socket"); | |
d721bef8 | 1393 | return LTTNG_LIVE_VIEWER_STATUS_ERROR; |
4164020e SM |
1394 | } |
1395 | ||
4164020e SM |
1396 | viewer_connection->control_sock = BT_INVALID_SOCKET; |
1397 | viewer_connection->port = -1; | |
1398 | viewer_connection->in_query = in_query; | |
1399 | viewer_connection->lttng_live_msg_iter = lttng_live_msg_iter; | |
30d81897 | 1400 | viewer_connection->url = url; |
4164020e | 1401 | |
0f5c5d5c | 1402 | BT_CPPLOGD_SPEC(viewer_connection->logger, "Establishing connection to url \"{}\"...", url); |
d721bef8 SM |
1403 | const auto status = lttng_live_connect_viewer(viewer_connection.get()); |
1404 | ||
4164020e SM |
1405 | /* |
1406 | * Only print error and append cause in case of error. not in case of | |
1407 | * interruption. | |
1408 | */ | |
1409 | if (status == LTTNG_LIVE_VIEWER_STATUS_ERROR) { | |
0f5c5d5c SM |
1410 | BT_CPPLOGE_APPEND_CAUSE_SPEC(viewer_connection->logger, |
1411 | "Failed to establish connection: " | |
1412 | "url=\"{}\"", | |
1413 | url); | |
d721bef8 | 1414 | return status; |
4164020e | 1415 | } else if (status == LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED) { |
d721bef8 | 1416 | return status; |
4164020e | 1417 | } |
0f5c5d5c | 1418 | BT_CPPLOGD_SPEC(viewer_connection->logger, "Connection to url \"{}\" is established", url); |
4164020e | 1419 | |
d721bef8 SM |
1420 | viewer = std::move(viewer_connection); |
1421 | return LTTNG_LIVE_VIEWER_STATUS_OK; | |
7cdc2bab MD |
1422 | } |
1423 | ||
277bcb7f | 1424 | live_viewer_connection::~live_viewer_connection() |
7cdc2bab | 1425 | { |
277bcb7f | 1426 | BT_CPPLOGD_SPEC(this->logger, "Closing connection to relay: relay-url=\"{}\"", this->url); |
b9e6ec43 | 1427 | |
e5694f0e | 1428 | viewer_connection_close_socket(this); |
1cb3cdd7 | 1429 | |
4164020e | 1430 | bt_socket_fini(); |
7cdc2bab | 1431 | } |