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7cdc2bab MD |
1 | /* |
2 | * Copyright 2016 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
3 | * | |
4 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
5 | * of this software and associated documentation files (the "Software"), to deal | |
6 | * in the Software without restriction, including without limitation the rights | |
7 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
8 | * copies of the Software, and to permit persons to whom the Software is | |
9 | * furnished to do so, subject to the following conditions: | |
10 | * | |
11 | * The above copyright notice and this permission notice shall be included in | |
12 | * all copies or substantial portions of the Software. | |
13 | * | |
14 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
15 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
16 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
17 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
18 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
19 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
20 | * SOFTWARE. | |
21 | */ | |
22 | ||
23 | #include <stdio.h> | |
24 | #include <stdint.h> | |
25 | #include <stdlib.h> | |
26 | #include <stdbool.h> | |
27 | #include <unistd.h> | |
28 | #include <glib.h> | |
29 | #include <inttypes.h> | |
30 | #include <sys/socket.h> | |
31 | #include <sys/types.h> | |
32 | #include <netinet/in.h> | |
33 | #include <netdb.h> | |
34 | #include <fcntl.h> | |
35 | #include <poll.h> | |
36 | ||
37 | #include <babeltrace/compat/send-internal.h> | |
38 | #include <babeltrace/compiler-internal.h> | |
39 | ||
40 | #include "lttng-live-internal.h" | |
41 | #include "viewer-connection.h" | |
42 | #include "lttng-viewer-abi.h" | |
43 | #include "data-stream.h" | |
44 | #include "metadata.h" | |
45 | ||
46 | #define PRINT_ERR_STREAM viewer_connection->error_fp | |
47 | #define PRINT_PREFIX "lttng-live-viewer-connection" | |
48 | #define PRINT_DBG_CHECK lttng_live_debug | |
49 | #include "../print.h" | |
50 | ||
51 | static ssize_t lttng_live_recv(int fd, void *buf, size_t len) | |
52 | { | |
53 | ssize_t ret; | |
54 | size_t copied = 0, to_copy = len; | |
55 | ||
56 | do { | |
57 | ret = recv(fd, buf + copied, to_copy, 0); | |
58 | if (ret > 0) { | |
59 | assert(ret <= to_copy); | |
60 | copied += ret; | |
61 | to_copy -= ret; | |
62 | } | |
63 | } while ((ret > 0 && to_copy > 0) | |
64 | || (ret < 0 && errno == EINTR)); | |
65 | if (ret > 0) | |
66 | ret = copied; | |
67 | /* ret = 0 means orderly shutdown, ret < 0 is error. */ | |
68 | return ret; | |
69 | } | |
70 | ||
71 | static ssize_t lttng_live_send(int fd, const void *buf, size_t len) | |
72 | { | |
73 | ssize_t ret; | |
74 | ||
75 | do { | |
76 | ret = bt_send_nosigpipe(fd, buf, len); | |
77 | } while (ret < 0 && errno == EINTR); | |
78 | return ret; | |
79 | } | |
80 | ||
81 | /* | |
82 | * hostname parameter needs to hold MAXNAMLEN chars. | |
83 | */ | |
84 | static int parse_url(struct bt_live_viewer_connection *viewer_connection) | |
85 | { | |
86 | char remain[3][MAXNAMLEN]; | |
87 | int ret = -1, proto, proto_offset = 0; | |
88 | const char *path = viewer_connection->url->str; | |
89 | size_t path_len; | |
90 | ||
91 | if (!path) { | |
92 | goto end; | |
93 | } | |
94 | path_len = strlen(path); /* not accounting \0 */ | |
95 | ||
96 | /* | |
97 | * Since sscanf API does not allow easily checking string length | |
98 | * against a size defined by a macro. Test it beforehand on the | |
99 | * input. We know the output is always <= than the input length. | |
100 | */ | |
101 | if (path_len >= MAXNAMLEN) { | |
102 | goto end; | |
103 | } | |
104 | ret = sscanf(path, "net%d://", &proto); | |
105 | if (ret < 1) { | |
106 | proto = 4; | |
107 | /* net:// */ | |
108 | proto_offset = strlen("net://"); | |
109 | } else { | |
110 | /* net4:// or net6:// */ | |
111 | proto_offset = strlen("netX://"); | |
112 | } | |
113 | if (proto_offset > path_len) { | |
114 | goto end; | |
115 | } | |
116 | if (proto == 6) { | |
117 | PERR("[error] IPv6 is currently unsupported by lttng-live\n"); | |
118 | goto end; | |
119 | } | |
120 | /* TODO : parse for IPv6 as well */ | |
121 | /* Parse the hostname or IP */ | |
122 | ret = sscanf(&path[proto_offset], "%[a-zA-Z.0-9%-]%s", | |
123 | viewer_connection->relay_hostname, remain[0]); | |
124 | if (ret == 2) { | |
125 | /* Optional port number */ | |
126 | switch (remain[0][0]) { | |
127 | case ':': | |
128 | ret = sscanf(remain[0], ":%d%s", &viewer_connection->port, remain[1]); | |
129 | /* Optional session ID with port number */ | |
130 | if (ret == 2) { | |
131 | ret = sscanf(remain[1], "/%s", remain[2]); | |
132 | /* Accept 0 or 1 (optional) */ | |
133 | if (ret < 0) { | |
134 | goto end; | |
135 | } | |
136 | } else if (ret == 0) { | |
137 | PERR("[error] Missing port number after delimitor ':'\n"); | |
138 | ret = -1; | |
139 | goto end; | |
140 | } | |
141 | break; | |
142 | case '/': | |
143 | /* Optional session ID */ | |
144 | ret = sscanf(remain[0], "/%s", remain[2]); | |
145 | /* Accept 0 or 1 (optional) */ | |
146 | if (ret < 0) { | |
147 | goto end; | |
148 | } | |
149 | break; | |
150 | default: | |
151 | PERR("[error] wrong delimitor : %c\n", remain[0][0]); | |
152 | ret = -1; | |
153 | goto end; | |
154 | } | |
155 | } | |
156 | ||
157 | if (viewer_connection->port < 0) { | |
158 | viewer_connection->port = LTTNG_DEFAULT_NETWORK_VIEWER_PORT; | |
159 | } | |
160 | ||
161 | if (strlen(remain[2]) == 0) { | |
162 | PDBG("Connecting to hostname : %s, port : %d, " | |
163 | "proto : IPv%d\n", | |
164 | viewer_connection->relay_hostname, | |
165 | viewer_connection->port, | |
166 | proto); | |
167 | ret = 0; | |
168 | goto end; | |
169 | } | |
170 | ret = sscanf(remain[2], "host/%[a-zA-Z.0-9%-]/%s", | |
171 | viewer_connection->target_hostname, | |
172 | viewer_connection->session_name); | |
173 | if (ret != 2) { | |
174 | PERR("[error] Format : " | |
175 | "net://<hostname>/host/<target_hostname>/<session_name>\n"); | |
176 | goto end; | |
177 | } | |
178 | ||
179 | PDBG("Connecting to hostname : %s, port : %d, " | |
180 | "target hostname : %s, session name : %s, " | |
181 | "proto : IPv%d\n", | |
182 | viewer_connection->relay_hostname, | |
183 | viewer_connection->port, | |
184 | viewer_connection->target_hostname, | |
185 | viewer_connection->session_name, proto); | |
186 | ret = 0; | |
187 | ||
188 | end: | |
189 | return ret; | |
190 | } | |
191 | ||
192 | static int lttng_live_handshake(struct bt_live_viewer_connection *viewer_connection) | |
193 | { | |
194 | struct lttng_viewer_cmd cmd; | |
195 | struct lttng_viewer_connect connect; | |
196 | int ret; | |
197 | ssize_t ret_len; | |
198 | ||
199 | cmd.cmd = htobe32(LTTNG_VIEWER_CONNECT); | |
200 | cmd.data_size = htobe64((uint64_t) sizeof(connect)); | |
201 | cmd.cmd_version = htobe32(0); | |
202 | ||
203 | connect.viewer_session_id = -1ULL; /* will be set on recv */ | |
204 | connect.major = htobe32(LTTNG_LIVE_MAJOR); | |
205 | connect.minor = htobe32(LTTNG_LIVE_MINOR); | |
206 | connect.type = htobe32(LTTNG_VIEWER_CLIENT_COMMAND); | |
207 | ||
208 | ret_len = lttng_live_send(viewer_connection->control_sock, &cmd, sizeof(cmd)); | |
209 | if (ret_len < 0) { | |
210 | PERR("Error sending cmd: %s\n", strerror(errno)); | |
211 | goto error; | |
212 | } | |
213 | assert(ret_len == sizeof(cmd)); | |
214 | ||
215 | ret_len = lttng_live_send(viewer_connection->control_sock, &connect, sizeof(connect)); | |
216 | if (ret_len < 0) { | |
217 | PERR("Error sending version: %s\n", strerror(errno)); | |
218 | goto error; | |
219 | } | |
220 | assert(ret_len == sizeof(connect)); | |
221 | ||
222 | ret_len = lttng_live_recv(viewer_connection->control_sock, &connect, sizeof(connect)); | |
223 | if (ret_len == 0) { | |
224 | PERR("Remote side has closed connection\n"); | |
225 | goto error; | |
226 | } | |
227 | if (ret_len < 0) { | |
228 | PERR("[error] Error receiving version: %s", strerror(errno)); | |
229 | goto error; | |
230 | } | |
231 | assert(ret_len == sizeof(connect)); | |
232 | ||
233 | PDBG("Received viewer session ID : %" PRIu64 "\n", | |
234 | be64toh(connect.viewer_session_id)); | |
235 | PDBG("Relayd version : %u.%u\n", be32toh(connect.major), | |
236 | be32toh(connect.minor)); | |
237 | ||
238 | if (LTTNG_LIVE_MAJOR != be32toh(connect.major)) { | |
239 | PERR("Incompatible lttng-relayd protocol\n"); | |
240 | goto error; | |
241 | } | |
242 | /* Use the smallest protocol version implemented. */ | |
243 | if (LTTNG_LIVE_MINOR > be32toh(connect.minor)) { | |
244 | viewer_connection->minor = be32toh(connect.minor); | |
245 | } else { | |
246 | viewer_connection->minor = LTTNG_LIVE_MINOR; | |
247 | } | |
248 | viewer_connection->major = LTTNG_LIVE_MAJOR; | |
249 | ret = 0; | |
250 | return ret; | |
251 | ||
252 | error: | |
253 | PERR("Unable to establish connection\n"); | |
254 | return -1; | |
255 | } | |
256 | ||
257 | static int lttng_live_connect_viewer(struct bt_live_viewer_connection *viewer_connection) | |
258 | { | |
259 | struct hostent *host; | |
260 | struct sockaddr_in server_addr; | |
261 | int ret; | |
262 | ||
263 | if (parse_url(viewer_connection)) { | |
264 | goto error; | |
265 | } | |
266 | ||
267 | host = gethostbyname(viewer_connection->relay_hostname); | |
268 | if (!host) { | |
269 | PERR("[error] Cannot lookup hostname %s\n", | |
270 | viewer_connection->relay_hostname); | |
271 | goto error; | |
272 | } | |
273 | ||
274 | if ((viewer_connection->control_sock = socket(AF_INET, SOCK_STREAM, 0)) == -1) { | |
275 | PERR("[error] Socket creation failed: %s\n", strerror(errno)); | |
276 | goto error; | |
277 | } | |
278 | ||
279 | server_addr.sin_family = AF_INET; | |
280 | server_addr.sin_port = htons(viewer_connection->port); | |
281 | server_addr.sin_addr = *((struct in_addr *) host->h_addr); | |
282 | memset(&(server_addr.sin_zero), 0, 8); | |
283 | ||
284 | if (connect(viewer_connection->control_sock, (struct sockaddr *) &server_addr, | |
285 | sizeof(struct sockaddr)) == -1) { | |
286 | PERR("[error] Connection failed: %s\n", strerror(errno)); | |
287 | goto error; | |
288 | } | |
289 | if (lttng_live_handshake(viewer_connection)) { | |
290 | goto error; | |
291 | } | |
292 | ||
293 | ret = 0; | |
294 | ||
295 | return ret; | |
296 | ||
297 | error: | |
298 | if (viewer_connection->control_sock >= 0) { | |
299 | if (close(viewer_connection->control_sock)) { | |
300 | PERR("Close: %s", strerror(errno)); | |
301 | } | |
302 | } | |
303 | viewer_connection->control_sock = -1; | |
304 | return -1; | |
305 | } | |
306 | ||
307 | static void lttng_live_disconnect_viewer(struct bt_live_viewer_connection *viewer_connection) | |
308 | { | |
309 | if (viewer_connection->control_sock < 0) { | |
310 | return; | |
311 | } | |
312 | if (close(viewer_connection->control_sock)) { | |
313 | PERR("Close: %s", strerror(errno)); | |
314 | viewer_connection->control_sock = -1; | |
315 | } | |
316 | } | |
317 | ||
318 | static void connection_release(struct bt_object *obj) | |
319 | { | |
320 | struct bt_live_viewer_connection *conn = | |
321 | container_of(obj, struct bt_live_viewer_connection, obj); | |
322 | ||
323 | bt_live_viewer_connection_destroy(conn); | |
324 | } | |
325 | ||
326 | static | |
327 | enum bt_value_status list_update_session(struct bt_value *results, | |
328 | const struct lttng_viewer_session *session, | |
329 | bool *_found) | |
330 | { | |
331 | enum bt_value_status ret = BT_VALUE_STATUS_OK; | |
332 | struct bt_value *map = NULL; | |
333 | struct bt_value *hostname = NULL; | |
334 | struct bt_value *session_name = NULL; | |
335 | struct bt_value *btval = NULL; | |
336 | int i, len; | |
337 | bool found = false; | |
338 | ||
339 | len = bt_value_array_size(results); | |
340 | if (len < 0) { | |
341 | ret = BT_VALUE_STATUS_ERROR; | |
342 | goto end; | |
343 | } | |
344 | for (i = 0; i < len; i++) { | |
345 | const char *hostname_str = NULL; | |
346 | const char *session_name_str = NULL; | |
347 | ||
348 | map = bt_value_array_get(results, (size_t) i); | |
349 | if (!map) { | |
350 | ret = BT_VALUE_STATUS_ERROR; | |
351 | goto end; | |
352 | } | |
353 | hostname = bt_value_map_get(map, "target-hostname"); | |
354 | if (!hostname) { | |
355 | ret = BT_VALUE_STATUS_ERROR; | |
356 | goto end; | |
357 | } | |
358 | session_name = bt_value_map_get(map, "session-name"); | |
359 | if (!session_name) { | |
360 | ret = BT_VALUE_STATUS_ERROR; | |
361 | goto end; | |
362 | } | |
363 | ret = bt_value_string_get(hostname, &hostname_str); | |
364 | if (ret != BT_VALUE_STATUS_OK) { | |
365 | goto end; | |
366 | } | |
367 | ret = bt_value_string_get(session_name, &session_name_str); | |
368 | if (ret != BT_VALUE_STATUS_OK) { | |
369 | goto end; | |
370 | } | |
371 | ||
372 | if (!strcmp(session->hostname, hostname_str) | |
373 | && !strcmp(session->session_name, | |
374 | session_name_str)) { | |
375 | int64_t val; | |
376 | uint32_t streams = be32toh(session->streams); | |
377 | uint32_t clients = be32toh(session->clients); | |
378 | ||
379 | found = true; | |
380 | ||
381 | btval = bt_value_map_get(map, "stream-count"); | |
382 | if (!btval) { | |
383 | ret = BT_VALUE_STATUS_ERROR; | |
384 | goto end; | |
385 | } | |
386 | ret = bt_value_integer_get(btval, &val); | |
387 | if (ret != BT_VALUE_STATUS_OK) { | |
388 | goto end; | |
389 | } | |
390 | /* sum */ | |
391 | val += streams; | |
392 | ret = bt_value_integer_set(btval, val); | |
393 | if (ret != BT_VALUE_STATUS_OK) { | |
394 | goto end; | |
395 | } | |
396 | BT_PUT(btval); | |
397 | ||
398 | btval = bt_value_map_get(map, "client-count"); | |
399 | if (!btval) { | |
400 | ret = BT_VALUE_STATUS_ERROR; | |
401 | goto end; | |
402 | } | |
403 | ret = bt_value_integer_get(btval, &val); | |
404 | if (ret != BT_VALUE_STATUS_OK) { | |
405 | goto end; | |
406 | } | |
407 | /* max */ | |
408 | val = max_t(int64_t, clients, val); | |
409 | ret = bt_value_integer_set(btval, val); | |
410 | if (ret != BT_VALUE_STATUS_OK) { | |
411 | goto end; | |
412 | } | |
413 | BT_PUT(btval); | |
414 | } | |
415 | ||
416 | BT_PUT(hostname); | |
417 | BT_PUT(session_name); | |
418 | BT_PUT(map); | |
419 | ||
420 | if (found) { | |
421 | break; | |
422 | } | |
423 | } | |
424 | end: | |
425 | BT_PUT(btval); | |
426 | BT_PUT(hostname); | |
427 | BT_PUT(session_name); | |
428 | BT_PUT(map); | |
429 | *_found = found; | |
430 | return ret; | |
431 | } | |
432 | ||
433 | static | |
434 | enum bt_value_status list_append_session(struct bt_value *results, | |
435 | GString *base_url, | |
436 | const struct lttng_viewer_session *session) | |
437 | { | |
438 | enum bt_value_status ret = BT_VALUE_STATUS_OK; | |
439 | struct bt_value *map = NULL; | |
440 | GString *url = NULL; | |
441 | bool found = false; | |
442 | ||
443 | /* | |
444 | * If the session already exists, add the stream count to it, | |
445 | * and do max of client counts. | |
446 | */ | |
447 | ret = list_update_session(results, session, &found); | |
448 | if (ret != BT_VALUE_STATUS_OK || found) { | |
449 | goto end; | |
450 | } | |
451 | ||
452 | map = bt_value_map_create(); | |
453 | if (!map) { | |
454 | ret = BT_VALUE_STATUS_ERROR; | |
455 | goto end; | |
456 | } | |
457 | ||
458 | if (base_url->len < 1) { | |
459 | ret = BT_VALUE_STATUS_ERROR; | |
460 | goto end; | |
461 | } | |
462 | /* | |
463 | * key = "url", | |
464 | * value = <string>, | |
465 | */ | |
466 | url = g_string_new(base_url->str); | |
467 | g_string_append(url, "/host/"); | |
468 | g_string_append(url, session->hostname); | |
469 | g_string_append_c(url, '/'); | |
470 | g_string_append(url, session->session_name); | |
471 | ||
472 | ret = bt_value_map_insert_string(map, "url", url->str); | |
473 | if (ret != BT_VALUE_STATUS_OK) { | |
474 | goto end; | |
475 | } | |
476 | ||
477 | /* | |
478 | * key = "target-hostname", | |
479 | * value = <string>, | |
480 | */ | |
481 | ret = bt_value_map_insert_string(map, "target-hostname", | |
482 | session->hostname); | |
483 | if (ret != BT_VALUE_STATUS_OK) { | |
484 | goto end; | |
485 | } | |
486 | ||
487 | /* | |
488 | * key = "session-name", | |
489 | * value = <string>, | |
490 | */ | |
491 | ret = bt_value_map_insert_string(map, "session-name", | |
492 | session->session_name); | |
493 | if (ret != BT_VALUE_STATUS_OK) { | |
494 | goto end; | |
495 | } | |
496 | ||
497 | /* | |
498 | * key = "timer-us", | |
499 | * value = <integer>, | |
500 | */ | |
501 | { | |
502 | uint32_t live_timer = be32toh(session->live_timer); | |
503 | ||
504 | ret = bt_value_map_insert_integer(map, "timer-us", | |
505 | live_timer); | |
506 | if (ret != BT_VALUE_STATUS_OK) { | |
507 | goto end; | |
508 | } | |
509 | } | |
510 | ||
511 | /* | |
512 | * key = "stream-count", | |
513 | * value = <integer>, | |
514 | */ | |
515 | { | |
516 | uint32_t streams = be32toh(session->streams); | |
517 | ||
518 | ret = bt_value_map_insert_integer(map, "stream-count", | |
519 | streams); | |
520 | if (ret != BT_VALUE_STATUS_OK) { | |
521 | goto end; | |
522 | } | |
523 | } | |
524 | ||
525 | ||
526 | /* | |
527 | * key = "client-count", | |
528 | * value = <integer>, | |
529 | */ | |
530 | { | |
531 | uint32_t clients = be32toh(session->clients); | |
532 | ||
533 | ret = bt_value_map_insert_integer(map, "client-count", | |
534 | clients); | |
535 | if (ret != BT_VALUE_STATUS_OK) { | |
536 | goto end; | |
537 | } | |
538 | } | |
539 | ||
540 | ret = bt_value_array_append(results, map); | |
541 | end: | |
542 | if (url) { | |
543 | g_string_free(url, TRUE); | |
544 | } | |
545 | BT_PUT(map); | |
546 | return ret; | |
547 | } | |
548 | ||
549 | /* | |
550 | * Data structure returned: | |
551 | * | |
552 | * { | |
553 | * <array> = { | |
554 | * [n] = { | |
555 | * <map> = { | |
556 | * { | |
557 | * key = "url", | |
558 | * value = <string>, | |
559 | * }, | |
560 | * { | |
561 | * key = "target-hostname", | |
562 | * value = <string>, | |
563 | * }, | |
564 | * { | |
565 | * key = "session-name", | |
566 | * value = <string>, | |
567 | * }, | |
568 | * { | |
569 | * key = "timer-us", | |
570 | * value = <integer>, | |
571 | * }, | |
572 | * { | |
573 | * key = "stream-count", | |
574 | * value = <integer>, | |
575 | * }, | |
576 | * { | |
577 | * key = "client-count", | |
578 | * value = <integer>, | |
579 | * }, | |
580 | * }, | |
581 | * } | |
582 | * } | |
583 | */ | |
584 | ||
585 | BT_HIDDEN | |
586 | struct bt_value *bt_live_viewer_connection_list_sessions(struct bt_live_viewer_connection *viewer_connection) | |
587 | { | |
588 | struct bt_value *results = NULL; | |
589 | struct lttng_viewer_cmd cmd; | |
590 | struct lttng_viewer_list_sessions list; | |
591 | uint32_t i, sessions_count; | |
592 | ssize_t ret_len; | |
593 | ||
594 | if (lttng_live_handshake(viewer_connection)) { | |
595 | goto error; | |
596 | } | |
597 | ||
598 | results = bt_value_array_create(); | |
599 | if (!results) { | |
600 | fprintf(stderr, "Error creating array\n"); | |
601 | goto error; | |
602 | } | |
603 | ||
604 | cmd.cmd = htobe32(LTTNG_VIEWER_LIST_SESSIONS); | |
605 | cmd.data_size = htobe64((uint64_t) 0); | |
606 | cmd.cmd_version = htobe32(0); | |
607 | ||
608 | ret_len = lttng_live_send(viewer_connection->control_sock, &cmd, sizeof(cmd)); | |
609 | if (ret_len < 0) { | |
610 | fprintf(stderr, "Error sending cmd: %s\n", strerror(errno)); | |
611 | goto error; | |
612 | } | |
613 | assert(ret_len == sizeof(cmd)); | |
614 | ||
615 | ret_len = lttng_live_recv(viewer_connection->control_sock, &list, sizeof(list)); | |
616 | if (ret_len == 0) { | |
617 | fprintf(stderr, "Remote side has closed connection\n"); | |
618 | goto error; | |
619 | } | |
620 | if (ret_len < 0) { | |
621 | fprintf(stderr, "Error receiving session list: %s\n", strerror(errno)); | |
622 | goto error; | |
623 | } | |
624 | assert(ret_len == sizeof(list)); | |
625 | ||
626 | sessions_count = be32toh(list.sessions_count); | |
627 | for (i = 0; i < sessions_count; i++) { | |
628 | struct lttng_viewer_session lsession; | |
629 | ||
630 | ret_len = lttng_live_recv(viewer_connection->control_sock, | |
631 | &lsession, sizeof(lsession)); | |
632 | if (ret_len == 0) { | |
633 | fprintf(stderr, "Remote side has closed connection\n"); | |
634 | goto error; | |
635 | } | |
636 | if (ret_len < 0) { | |
637 | fprintf(stderr, "Error receiving session: %s\n", strerror(errno)); | |
638 | goto error; | |
639 | } | |
640 | assert(ret_len == sizeof(lsession)); | |
641 | lsession.hostname[LTTNG_VIEWER_HOST_NAME_MAX - 1] = '\0'; | |
642 | lsession.session_name[LTTNG_VIEWER_NAME_MAX - 1] = '\0'; | |
643 | if (list_append_session(results, | |
644 | viewer_connection->url, &lsession) | |
645 | != BT_VALUE_STATUS_OK) { | |
646 | goto error; | |
647 | } | |
648 | } | |
649 | goto end; | |
650 | error: | |
651 | BT_PUT(results); | |
652 | end: | |
653 | return results; | |
654 | } | |
655 | ||
656 | static | |
657 | int lttng_live_query_session_ids(struct lttng_live_component *lttng_live) | |
658 | { | |
659 | struct lttng_viewer_cmd cmd; | |
660 | struct lttng_viewer_list_sessions list; | |
661 | struct lttng_viewer_session lsession; | |
662 | uint32_t i, sessions_count; | |
663 | ssize_t ret_len; | |
664 | uint64_t session_id; | |
665 | struct bt_live_viewer_connection *viewer_connection = | |
666 | lttng_live->viewer_connection; | |
667 | ||
668 | cmd.cmd = htobe32(LTTNG_VIEWER_LIST_SESSIONS); | |
669 | cmd.data_size = htobe64((uint64_t) 0); | |
670 | cmd.cmd_version = htobe32(0); | |
671 | ||
672 | ret_len = lttng_live_send(viewer_connection->control_sock, &cmd, sizeof(cmd)); | |
673 | if (ret_len < 0) { | |
674 | PERR("Error sending cmd: %s\n", strerror(errno)); | |
675 | goto error; | |
676 | } | |
677 | assert(ret_len == sizeof(cmd)); | |
678 | ||
679 | ret_len = lttng_live_recv(viewer_connection->control_sock, &list, sizeof(list)); | |
680 | if (ret_len == 0) { | |
681 | PERR("Remote side has closed connection\n"); | |
682 | goto error; | |
683 | } | |
684 | if (ret_len < 0) { | |
685 | PERR("Error receiving session list: %s\n", strerror(errno)); | |
686 | goto error; | |
687 | } | |
688 | assert(ret_len == sizeof(list)); | |
689 | ||
690 | sessions_count = be32toh(list.sessions_count); | |
691 | for (i = 0; i < sessions_count; i++) { | |
692 | ret_len = lttng_live_recv(viewer_connection->control_sock, | |
693 | &lsession, sizeof(lsession)); | |
694 | if (ret_len == 0) { | |
695 | PERR("Remote side has closed connection\n"); | |
696 | goto error; | |
697 | } | |
698 | if (ret_len < 0) { | |
699 | PERR("Error receiving session: %s\n", strerror(errno)); | |
700 | goto error; | |
701 | } | |
702 | assert(ret_len == sizeof(lsession)); | |
703 | lsession.hostname[LTTNG_VIEWER_HOST_NAME_MAX - 1] = '\0'; | |
704 | lsession.session_name[LTTNG_VIEWER_NAME_MAX - 1] = '\0'; | |
705 | session_id = be64toh(lsession.id); | |
706 | ||
707 | if ((strncmp(lsession.session_name, | |
708 | viewer_connection->session_name, | |
709 | MAXNAMLEN) == 0) && (strncmp(lsession.hostname, | |
710 | viewer_connection->target_hostname, | |
711 | MAXNAMLEN) == 0)) { | |
712 | if (lttng_live_add_session(lttng_live, session_id)) { | |
713 | goto error; | |
714 | } | |
715 | } | |
716 | } | |
717 | ||
718 | return 0; | |
719 | ||
720 | error: | |
721 | PERR("Unable to query session ids\n"); | |
722 | return -1; | |
723 | } | |
724 | ||
725 | BT_HIDDEN | |
726 | int lttng_live_create_viewer_session(struct lttng_live_component *lttng_live) | |
727 | { | |
728 | struct lttng_viewer_cmd cmd; | |
729 | struct lttng_viewer_create_session_response resp; | |
730 | ssize_t ret_len; | |
731 | struct bt_live_viewer_connection *viewer_connection = | |
732 | lttng_live->viewer_connection; | |
733 | ||
734 | cmd.cmd = htobe32(LTTNG_VIEWER_CREATE_SESSION); | |
735 | cmd.data_size = htobe64((uint64_t) 0); | |
736 | cmd.cmd_version = htobe32(0); | |
737 | ||
738 | ret_len = lttng_live_send(viewer_connection->control_sock, &cmd, sizeof(cmd)); | |
739 | if (ret_len < 0) { | |
740 | PERR("Error sending cmd: %s\n", strerror(errno)); | |
741 | goto error; | |
742 | } | |
743 | assert(ret_len == sizeof(cmd)); | |
744 | ||
745 | ret_len = lttng_live_recv(viewer_connection->control_sock, &resp, sizeof(resp)); | |
746 | if (ret_len == 0) { | |
747 | PERR("Remote side has closed connection\n"); | |
748 | goto error; | |
749 | } | |
750 | if (ret_len < 0) { | |
751 | PERR("Error receiving create session reply: %s\n", strerror(errno)); | |
752 | goto error; | |
753 | } | |
754 | assert(ret_len == sizeof(resp)); | |
755 | ||
756 | if (be32toh(resp.status) != LTTNG_VIEWER_CREATE_SESSION_OK) { | |
757 | PERR("Error creating viewer session\n"); | |
758 | goto error; | |
759 | } | |
760 | if (lttng_live_query_session_ids(lttng_live)) { | |
761 | goto error; | |
762 | } | |
763 | ||
764 | return 0; | |
765 | ||
766 | error: | |
767 | return -1; | |
768 | } | |
769 | ||
770 | static | |
771 | int receive_streams(struct lttng_live_session *session, | |
772 | uint32_t stream_count) | |
773 | { | |
774 | ssize_t ret_len; | |
775 | uint32_t i; | |
776 | struct lttng_live_component *lttng_live = session->lttng_live; | |
777 | struct bt_live_viewer_connection *viewer_connection = | |
778 | lttng_live->viewer_connection; | |
779 | ||
780 | PDBG("Getting %" PRIu32 " new streams:\n", stream_count); | |
781 | for (i = 0; i < stream_count; i++) { | |
782 | struct lttng_viewer_stream stream; | |
783 | struct lttng_live_stream_iterator *live_stream; | |
784 | uint64_t stream_id; | |
785 | uint64_t ctf_trace_id; | |
786 | ||
787 | ret_len = lttng_live_recv(viewer_connection->control_sock, &stream, sizeof(stream)); | |
788 | if (ret_len == 0) { | |
789 | PERR("Remote side has closed connection\n"); | |
790 | goto error; | |
791 | } | |
792 | if (ret_len < 0) { | |
793 | PERR("Error receiving stream\n"); | |
794 | goto error; | |
795 | } | |
796 | assert(ret_len == sizeof(stream)); | |
797 | stream.path_name[LTTNG_VIEWER_PATH_MAX - 1] = '\0'; | |
798 | stream.channel_name[LTTNG_VIEWER_NAME_MAX - 1] = '\0'; | |
799 | stream_id = be64toh(stream.id); | |
800 | ctf_trace_id = be64toh(stream.ctf_trace_id); | |
801 | ||
802 | if (stream.metadata_flag) { | |
803 | PDBG(" metadata stream %" PRIu64 " : %s/%s\n", | |
804 | stream_id, stream.path_name, | |
805 | stream.channel_name); | |
806 | if (lttng_live_metadata_create_stream(session, | |
807 | ctf_trace_id, stream_id)) { | |
808 | PERR("Error creating metadata stream\n"); | |
809 | ||
810 | goto error; | |
811 | } | |
812 | session->lazy_stream_notif_init = true; | |
813 | } else { | |
814 | PDBG(" stream %" PRIu64 " : %s/%s\n", | |
815 | stream_id, stream.path_name, | |
816 | stream.channel_name); | |
817 | live_stream = lttng_live_stream_iterator_create(session, | |
818 | ctf_trace_id, stream_id); | |
819 | if (!live_stream) { | |
820 | PERR("Error creating stream\n"); | |
821 | goto error; | |
822 | } | |
823 | } | |
824 | } | |
825 | return 0; | |
826 | ||
827 | error: | |
828 | return -1; | |
829 | } | |
830 | ||
831 | BT_HIDDEN | |
832 | int lttng_live_attach_session(struct lttng_live_session *session) | |
833 | { | |
834 | struct lttng_viewer_cmd cmd; | |
835 | struct lttng_viewer_attach_session_request rq; | |
836 | struct lttng_viewer_attach_session_response rp; | |
837 | ssize_t ret_len; | |
838 | struct lttng_live_component *lttng_live = session->lttng_live; | |
839 | struct bt_live_viewer_connection *viewer_connection = | |
840 | lttng_live->viewer_connection; | |
841 | uint64_t session_id = session->id; | |
842 | uint32_t streams_count; | |
843 | ||
844 | if (session->attached) { | |
845 | return 0; | |
846 | } | |
847 | ||
848 | cmd.cmd = htobe32(LTTNG_VIEWER_ATTACH_SESSION); | |
849 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); | |
850 | cmd.cmd_version = htobe32(0); | |
851 | ||
852 | memset(&rq, 0, sizeof(rq)); | |
853 | rq.session_id = htobe64(session_id); | |
854 | // TODO: add cmd line parameter to select seek beginning | |
855 | // rq.seek = htobe32(LTTNG_VIEWER_SEEK_BEGINNING); | |
856 | rq.seek = htobe32(LTTNG_VIEWER_SEEK_LAST); | |
857 | ||
858 | ret_len = lttng_live_send(viewer_connection->control_sock, &cmd, sizeof(cmd)); | |
859 | if (ret_len < 0) { | |
860 | PERR("Error sending cmd: %s\n", strerror(errno)); | |
861 | goto error; | |
862 | } | |
863 | assert(ret_len == sizeof(cmd)); | |
864 | ||
865 | ret_len = lttng_live_send(viewer_connection->control_sock, &rq, sizeof(rq)); | |
866 | if (ret_len < 0) { | |
867 | PERR("Error sending attach request: %s\n", strerror(errno)); | |
868 | goto error; | |
869 | } | |
870 | assert(ret_len == sizeof(rq)); | |
871 | ||
872 | ret_len = lttng_live_recv(viewer_connection->control_sock, &rp, sizeof(rp)); | |
873 | if (ret_len == 0) { | |
874 | PERR("Remote side has closed connection\n"); | |
875 | goto error; | |
876 | } | |
877 | if (ret_len < 0) { | |
878 | PERR("Error receiving attach response: %s\n", strerror(errno)); | |
879 | goto error; | |
880 | } | |
881 | assert(ret_len == sizeof(rp)); | |
882 | ||
883 | streams_count = be32toh(rp.streams_count); | |
884 | switch(be32toh(rp.status)) { | |
885 | case LTTNG_VIEWER_ATTACH_OK: | |
886 | break; | |
887 | case LTTNG_VIEWER_ATTACH_UNK: | |
888 | PERR("Session id %" PRIu64 " is unknown\n", session_id); | |
889 | goto error; | |
890 | case LTTNG_VIEWER_ATTACH_ALREADY: | |
891 | PERR("There is already a viewer attached to this session\n"); | |
892 | goto error; | |
893 | case LTTNG_VIEWER_ATTACH_NOT_LIVE: | |
894 | PERR("Not a live session\n"); | |
895 | goto error; | |
896 | case LTTNG_VIEWER_ATTACH_SEEK_ERR: | |
897 | PERR("Wrong seek parameter\n"); | |
898 | goto error; | |
899 | default: | |
900 | PERR("Unknown attach return code %u\n", be32toh(rp.status)); | |
901 | goto error; | |
902 | } | |
903 | ||
904 | /* We receive the initial list of streams. */ | |
905 | if (receive_streams(session, streams_count)) { | |
906 | goto error; | |
907 | } | |
908 | ||
909 | session->attached = true; | |
910 | session->new_streams_needed = false; | |
911 | ||
912 | return 0; | |
913 | ||
914 | error: | |
915 | return -1; | |
916 | } | |
917 | ||
918 | BT_HIDDEN | |
919 | int lttng_live_detach_session(struct lttng_live_session *session) | |
920 | { | |
921 | struct lttng_viewer_cmd cmd; | |
922 | struct lttng_viewer_detach_session_request rq; | |
923 | struct lttng_viewer_detach_session_response rp; | |
924 | ssize_t ret_len; | |
925 | struct lttng_live_component *lttng_live = session->lttng_live; | |
926 | struct bt_live_viewer_connection *viewer_connection = | |
927 | lttng_live->viewer_connection; | |
928 | uint64_t session_id = session->id; | |
929 | ||
930 | if (!session->attached) { | |
931 | return 0; | |
932 | } | |
933 | ||
934 | cmd.cmd = htobe32(LTTNG_VIEWER_DETACH_SESSION); | |
935 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); | |
936 | cmd.cmd_version = htobe32(0); | |
937 | ||
938 | memset(&rq, 0, sizeof(rq)); | |
939 | rq.session_id = htobe64(session_id); | |
940 | ||
941 | ret_len = lttng_live_send(viewer_connection->control_sock, &cmd, sizeof(cmd)); | |
942 | if (ret_len < 0) { | |
943 | PERR("Error sending cmd: %s\n", strerror(errno)); | |
944 | goto error; | |
945 | } | |
946 | assert(ret_len == sizeof(cmd)); | |
947 | ||
948 | ret_len = lttng_live_send(viewer_connection->control_sock, &rq, sizeof(rq)); | |
949 | if (ret_len < 0) { | |
950 | PERR("Error sending detach request: %s\n", strerror(errno)); | |
951 | goto error; | |
952 | } | |
953 | assert(ret_len == sizeof(rq)); | |
954 | ||
955 | ret_len = lttng_live_recv(viewer_connection->control_sock, &rp, sizeof(rp)); | |
956 | if (ret_len == 0) { | |
957 | PERR("Remote side has closed connection\n"); | |
958 | goto error; | |
959 | } | |
960 | if (ret_len < 0) { | |
961 | PERR("Error receiving detach response: %s\n", strerror(errno)); | |
962 | goto error; | |
963 | } | |
964 | assert(ret_len == sizeof(rp)); | |
965 | ||
966 | switch(be32toh(rp.status)) { | |
967 | case LTTNG_VIEWER_DETACH_SESSION_OK: | |
968 | break; | |
969 | case LTTNG_VIEWER_DETACH_SESSION_UNK: | |
970 | PERR("Session id %" PRIu64 " is unknown\n", session_id); | |
971 | goto error; | |
972 | case LTTNG_VIEWER_DETACH_SESSION_ERR: | |
973 | PERR("Error detaching session id %" PRIu64 "\n", session_id); | |
974 | goto error; | |
975 | default: | |
976 | PERR("Unknown detach return code %u\n", be32toh(rp.status)); | |
977 | goto error; | |
978 | } | |
979 | ||
980 | session->attached = false; | |
981 | ||
982 | return 0; | |
983 | ||
984 | error: | |
985 | return -1; | |
986 | } | |
987 | ||
988 | BT_HIDDEN | |
989 | ssize_t lttng_live_get_one_metadata_packet(struct lttng_live_trace *trace, | |
990 | FILE *fp) | |
991 | { | |
992 | uint64_t len = 0; | |
993 | int ret; | |
994 | struct lttng_viewer_cmd cmd; | |
995 | struct lttng_viewer_get_metadata rq; | |
996 | struct lttng_viewer_metadata_packet rp; | |
997 | char *data = NULL; | |
998 | ssize_t ret_len; | |
999 | struct lttng_live_session *session = trace->session; | |
1000 | struct lttng_live_component *lttng_live = session->lttng_live; | |
1001 | struct lttng_live_metadata *metadata = trace->metadata; | |
1002 | struct bt_live_viewer_connection *viewer_connection = | |
1003 | lttng_live->viewer_connection; | |
1004 | ||
1005 | rq.stream_id = htobe64(metadata->stream_id); | |
1006 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_METADATA); | |
1007 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); | |
1008 | cmd.cmd_version = htobe32(0); | |
1009 | ||
1010 | ret_len = lttng_live_send(viewer_connection->control_sock, &cmd, sizeof(cmd)); | |
1011 | if (ret_len < 0) { | |
1012 | PERR("Error sending cmd: %s\n", strerror(errno)); | |
1013 | goto error; | |
1014 | } | |
1015 | assert(ret_len == sizeof(cmd)); | |
1016 | ||
1017 | ret_len = lttng_live_send(viewer_connection->control_sock, &rq, sizeof(rq)); | |
1018 | if (ret_len < 0) { | |
1019 | PERR("Error sending get_metadata request: %s\n", strerror(errno)); | |
1020 | goto error; | |
1021 | } | |
1022 | assert(ret_len == sizeof(rq)); | |
1023 | ||
1024 | ret_len = lttng_live_recv(viewer_connection->control_sock, &rp, sizeof(rp)); | |
1025 | if (ret_len == 0) { | |
1026 | PERR("Remote side has closed connection\n"); | |
1027 | goto error; | |
1028 | } | |
1029 | if (ret_len < 0) { | |
1030 | PERR("Error receiving get_metadata response: %s\n", strerror(errno)); | |
1031 | goto error; | |
1032 | } | |
1033 | assert(ret_len == sizeof(rp)); | |
1034 | ||
1035 | switch (be32toh(rp.status)) { | |
1036 | case LTTNG_VIEWER_METADATA_OK: | |
1037 | PDBG("get_metadata : OK\n"); | |
1038 | break; | |
1039 | case LTTNG_VIEWER_NO_NEW_METADATA: | |
1040 | PDBG("get_metadata : NO NEW\n"); | |
1041 | ret = 0; | |
1042 | goto end; | |
1043 | case LTTNG_VIEWER_METADATA_ERR: | |
1044 | PDBG("get_metadata : ERR\n"); | |
1045 | goto error; | |
1046 | default: | |
1047 | PDBG("get_metadata : UNKNOWN\n"); | |
1048 | goto error; | |
1049 | } | |
1050 | ||
1051 | len = be64toh(rp.len); | |
1052 | PDBG("Writing %" PRIu64" bytes to metadata\n", len); | |
1053 | if (len <= 0) { | |
1054 | goto error; | |
1055 | } | |
1056 | ||
1057 | data = zmalloc(len); | |
1058 | if (!data) { | |
1059 | PERR("relay data zmalloc: %s", strerror(errno)); | |
1060 | goto error; | |
1061 | } | |
1062 | ret_len = lttng_live_recv(viewer_connection->control_sock, data, len); | |
1063 | if (ret_len == 0) { | |
1064 | PERR("[error] Remote side has closed connection\n"); | |
1065 | goto error_free_data; | |
1066 | } | |
1067 | if (ret_len < 0) { | |
1068 | PERR("[error] Error receiving trace packet: %s", strerror(errno)); | |
1069 | goto error_free_data; | |
1070 | } | |
1071 | assert(ret_len == len); | |
1072 | ||
1073 | do { | |
1074 | ret_len = fwrite(data, 1, len, fp); | |
1075 | } while (ret_len < 0 && errno == EINTR); | |
1076 | if (ret_len < 0) { | |
1077 | PERR("[error] Writing in the metadata fp\n"); | |
1078 | goto error_free_data; | |
1079 | } | |
1080 | assert(ret_len == len); | |
1081 | free(data); | |
1082 | ret = len; | |
1083 | end: | |
1084 | return ret; | |
1085 | ||
1086 | error_free_data: | |
1087 | free(data); | |
1088 | error: | |
1089 | return -1; | |
1090 | } | |
1091 | ||
1092 | /* | |
1093 | * Assign the fields from a lttng_viewer_index to a packet_index. | |
1094 | */ | |
1095 | static | |
1096 | void lttng_index_to_packet_index(struct lttng_viewer_index *lindex, | |
1097 | struct packet_index *pindex) | |
1098 | { | |
1099 | assert(lindex); | |
1100 | assert(pindex); | |
1101 | ||
1102 | pindex->offset = be64toh(lindex->offset); | |
1103 | pindex->packet_size = be64toh(lindex->packet_size); | |
1104 | pindex->content_size = be64toh(lindex->content_size); | |
1105 | pindex->ts_cycles.timestamp_begin = be64toh(lindex->timestamp_begin); | |
1106 | pindex->ts_cycles.timestamp_end = be64toh(lindex->timestamp_end); | |
1107 | pindex->events_discarded = be64toh(lindex->events_discarded); | |
1108 | } | |
1109 | ||
1110 | BT_HIDDEN | |
1111 | enum bt_ctf_lttng_live_iterator_status lttng_live_get_next_index(struct lttng_live_component *lttng_live, | |
1112 | struct lttng_live_stream_iterator *stream, | |
1113 | struct packet_index *index) | |
1114 | { | |
1115 | struct lttng_viewer_cmd cmd; | |
1116 | struct lttng_viewer_get_next_index rq; | |
1117 | ssize_t ret_len; | |
1118 | struct lttng_viewer_index rp; | |
1119 | uint32_t flags, status; | |
1120 | enum bt_ctf_lttng_live_iterator_status retstatus = | |
1121 | BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK; | |
1122 | struct bt_live_viewer_connection *viewer_connection = | |
1123 | lttng_live->viewer_connection; | |
1124 | struct lttng_live_trace *trace = stream->trace; | |
1125 | ||
1126 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_NEXT_INDEX); | |
1127 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); | |
1128 | cmd.cmd_version = htobe32(0); | |
1129 | ||
1130 | memset(&rq, 0, sizeof(rq)); | |
1131 | rq.stream_id = htobe64(stream->viewer_stream_id); | |
1132 | ||
1133 | ret_len = lttng_live_send(viewer_connection->control_sock, &cmd, sizeof(cmd)); | |
1134 | if (ret_len < 0) { | |
1135 | PERR("Error sending cmd: %s\n", strerror(errno)); | |
1136 | goto error; | |
1137 | } | |
1138 | assert(ret_len == sizeof(cmd)); | |
1139 | ||
1140 | ret_len = lttng_live_send(viewer_connection->control_sock, &rq, sizeof(rq)); | |
1141 | if (ret_len < 0) { | |
1142 | PERR("Error sending get_next_index request: %s\n", strerror(errno)); | |
1143 | goto error; | |
1144 | } | |
1145 | assert(ret_len == sizeof(rq)); | |
1146 | ||
1147 | ret_len = lttng_live_recv(viewer_connection->control_sock, &rp, sizeof(rp)); | |
1148 | if (ret_len == 0) { | |
1149 | PERR("Remote side has closed connection\n"); | |
1150 | goto error; | |
1151 | } | |
1152 | if (ret_len < 0) { | |
1153 | PERR("Error receiving get_next_index response: %s\n", strerror(errno)); | |
1154 | goto error; | |
1155 | } | |
1156 | assert(ret_len == sizeof(rp)); | |
1157 | ||
1158 | flags = be32toh(rp.flags); | |
1159 | status = be32toh(rp.status); | |
1160 | ||
1161 | switch (status) { | |
1162 | case LTTNG_VIEWER_INDEX_INACTIVE: | |
1163 | { | |
1164 | uint64_t ctf_stream_class_id; | |
1165 | ||
1166 | PDBG("get_next_index: inactive\n"); | |
1167 | memset(index, 0, sizeof(struct packet_index)); | |
1168 | index->ts_cycles.timestamp_end = be64toh(rp.timestamp_end); | |
1169 | stream->current_inactivity_timestamp = index->ts_cycles.timestamp_end; | |
1170 | ctf_stream_class_id = be64toh(rp.stream_id); | |
1171 | if (stream->ctf_stream_class_id != -1ULL) { | |
1172 | assert(stream->ctf_stream_class_id == | |
1173 | ctf_stream_class_id); | |
1174 | } else { | |
1175 | stream->ctf_stream_class_id = ctf_stream_class_id; | |
1176 | } | |
1177 | stream->state = LTTNG_LIVE_STREAM_QUIESCENT; | |
1178 | break; | |
1179 | } | |
1180 | case LTTNG_VIEWER_INDEX_OK: | |
1181 | { | |
1182 | uint64_t ctf_stream_class_id; | |
1183 | ||
1184 | PDBG("get_next_index: OK\n"); | |
1185 | lttng_index_to_packet_index(&rp, index); | |
1186 | ctf_stream_class_id = be64toh(rp.stream_id); | |
1187 | if (stream->ctf_stream_class_id != -1ULL) { | |
1188 | assert(stream->ctf_stream_class_id == | |
1189 | ctf_stream_class_id); | |
1190 | } else { | |
1191 | stream->ctf_stream_class_id = ctf_stream_class_id; | |
1192 | } | |
1193 | ||
1194 | stream->state = LTTNG_LIVE_STREAM_ACTIVE_DATA; | |
1195 | stream->current_packet_end_timestamp = | |
1196 | index->ts_cycles.timestamp_end; | |
1197 | ||
1198 | if (flags & LTTNG_VIEWER_FLAG_NEW_METADATA) { | |
1199 | PDBG("get_next_index: new metadata needed\n"); | |
1200 | trace->new_metadata_needed = true; | |
1201 | } | |
1202 | if (flags & LTTNG_VIEWER_FLAG_NEW_STREAM) { | |
1203 | PDBG("get_next_index: new streams needed\n"); | |
1204 | lttng_live_need_new_streams(lttng_live); | |
1205 | } | |
1206 | break; | |
1207 | } | |
1208 | case LTTNG_VIEWER_INDEX_RETRY: | |
1209 | PDBG("get_next_index: retry\n"); | |
1210 | memset(index, 0, sizeof(struct packet_index)); | |
1211 | retstatus = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_AGAIN; | |
1212 | stream->state = LTTNG_LIVE_STREAM_ACTIVE_NO_DATA; | |
1213 | goto end; | |
1214 | case LTTNG_VIEWER_INDEX_HUP: | |
1215 | PDBG("get_next_index: stream hung up\n"); | |
1216 | memset(index, 0, sizeof(struct packet_index)); | |
1217 | index->offset = EOF; | |
1218 | retstatus = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_END; | |
1219 | stream->state = LTTNG_LIVE_STREAM_EOF; | |
1220 | break; | |
1221 | case LTTNG_VIEWER_INDEX_ERR: | |
1222 | PERR("get_next_index: error\n"); | |
1223 | memset(index, 0, sizeof(struct packet_index)); | |
1224 | stream->state = LTTNG_LIVE_STREAM_ACTIVE_NO_DATA; | |
1225 | goto error; | |
1226 | default: | |
1227 | PERR("get_next_index: unkwown value\n"); | |
1228 | memset(index, 0, sizeof(struct packet_index)); | |
1229 | stream->state = LTTNG_LIVE_STREAM_ACTIVE_NO_DATA; | |
1230 | goto error; | |
1231 | } | |
1232 | end: | |
1233 | return retstatus; | |
1234 | ||
1235 | error: | |
1236 | retstatus = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_ERROR; | |
1237 | return retstatus; | |
1238 | } | |
1239 | ||
1240 | BT_HIDDEN | |
1241 | enum bt_ctf_notif_iter_medium_status lttng_live_get_stream_bytes(struct lttng_live_component *lttng_live, | |
1242 | struct lttng_live_stream_iterator *stream, uint8_t *buf, uint64_t offset, | |
1243 | uint64_t req_len, uint64_t *recv_len) | |
1244 | { | |
1245 | enum bt_ctf_notif_iter_medium_status retstatus = BT_CTF_NOTIF_ITER_MEDIUM_STATUS_OK; | |
1246 | struct lttng_viewer_cmd cmd; | |
1247 | struct lttng_viewer_get_packet rq; | |
1248 | struct lttng_viewer_trace_packet rp; | |
1249 | ssize_t ret_len; | |
1250 | uint32_t flags, status; | |
1251 | struct bt_live_viewer_connection *viewer_connection = | |
1252 | lttng_live->viewer_connection; | |
1253 | struct lttng_live_trace *trace = stream->trace; | |
1254 | ||
1255 | PDBG("lttng_live_get_stream_bytes: offset=%" PRIu64 ", req_len=%" PRIu64 "\n", | |
1256 | offset, req_len); | |
1257 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_PACKET); | |
1258 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); | |
1259 | cmd.cmd_version = htobe32(0); | |
1260 | ||
1261 | memset(&rq, 0, sizeof(rq)); | |
1262 | rq.stream_id = htobe64(stream->viewer_stream_id); | |
1263 | rq.offset = htobe64(offset); | |
1264 | rq.len = htobe32(req_len); | |
1265 | ||
1266 | ret_len = lttng_live_send(viewer_connection->control_sock, &cmd, sizeof(cmd)); | |
1267 | if (ret_len < 0) { | |
1268 | PERR("Error sending cmd: %s\n", strerror(errno)); | |
1269 | goto error; | |
1270 | } | |
1271 | assert(ret_len == sizeof(cmd)); | |
1272 | ||
1273 | ret_len = lttng_live_send(viewer_connection->control_sock, &rq, sizeof(rq)); | |
1274 | if (ret_len < 0) { | |
1275 | PERR("Error sending get_data request: %s\n", strerror(errno)); | |
1276 | goto error; | |
1277 | } | |
1278 | assert(ret_len == sizeof(rq)); | |
1279 | ||
1280 | ret_len = lttng_live_recv(viewer_connection->control_sock, &rp, sizeof(rp)); | |
1281 | if (ret_len == 0) { | |
1282 | PERR("Remote side has closed connection\n"); | |
1283 | goto error; | |
1284 | } | |
1285 | if (ret_len < 0) { | |
1286 | PERR("Error receiving get_data response: %s\n", strerror(errno)); | |
1287 | goto error; | |
1288 | } | |
1289 | if (ret_len != sizeof(rp)) { | |
1290 | PERR("[error] get_data_packet: expected %zu" | |
1291 | ", received %zd\n", sizeof(rp), | |
1292 | ret_len); | |
1293 | goto error; | |
1294 | } | |
1295 | ||
1296 | flags = be32toh(rp.flags); | |
1297 | status = be32toh(rp.status); | |
1298 | ||
1299 | switch (status) { | |
1300 | case LTTNG_VIEWER_GET_PACKET_OK: | |
1301 | req_len = be32toh(rp.len); | |
1302 | PDBG("get_data_packet: Ok, packet size : %" PRIu64 "\n", req_len); | |
1303 | break; | |
1304 | case LTTNG_VIEWER_GET_PACKET_RETRY: | |
1305 | /* Unimplemented by relay daemon */ | |
1306 | PDBG("get_data_packet: retry\n"); | |
1307 | retstatus = BT_CTF_NOTIF_ITER_MEDIUM_STATUS_AGAIN; | |
1308 | goto end; | |
1309 | case LTTNG_VIEWER_GET_PACKET_ERR: | |
1310 | if (flags & LTTNG_VIEWER_FLAG_NEW_METADATA) { | |
1311 | PDBG("get_data_packet: new metadata needed, try again later\n"); | |
1312 | trace->new_metadata_needed = true; | |
1313 | } | |
1314 | if (flags & LTTNG_VIEWER_FLAG_NEW_STREAM) { | |
1315 | PDBG("get_data_packet: new streams needed, try again later\n"); | |
1316 | lttng_live_need_new_streams(lttng_live); | |
1317 | } | |
1318 | if (flags & (LTTNG_VIEWER_FLAG_NEW_METADATA | |
1319 | | LTTNG_VIEWER_FLAG_NEW_STREAM)) { | |
1320 | retstatus = BT_CTF_NOTIF_ITER_MEDIUM_STATUS_AGAIN; | |
1321 | goto end; | |
1322 | } | |
1323 | PERR("get_data_packet: error\n"); | |
1324 | goto error; | |
1325 | case LTTNG_VIEWER_GET_PACKET_EOF: | |
1326 | retstatus = BT_CTF_NOTIF_ITER_MEDIUM_STATUS_EOF; | |
1327 | goto end; | |
1328 | default: | |
1329 | PDBG("get_data_packet: unknown\n"); | |
1330 | goto error; | |
1331 | } | |
1332 | ||
1333 | if (req_len == 0) { | |
1334 | goto error; | |
1335 | } | |
1336 | ||
1337 | ret_len = lttng_live_recv(viewer_connection->control_sock, buf, req_len); | |
1338 | if (ret_len == 0) { | |
1339 | PERR("Remote side has closed connection\n"); | |
1340 | goto error; | |
1341 | } | |
1342 | if (ret_len < 0) { | |
1343 | PERR("Error receiving trace packet: %s\n", strerror(errno)); | |
1344 | goto error; | |
1345 | } | |
1346 | assert(ret_len == req_len); | |
1347 | *recv_len = ret_len; | |
1348 | end: | |
1349 | return retstatus; | |
1350 | ||
1351 | error: | |
1352 | retstatus = BT_CTF_NOTIF_ITER_MEDIUM_STATUS_ERROR; | |
1353 | return retstatus; | |
1354 | } | |
1355 | ||
1356 | /* | |
1357 | * Request new streams for a session. | |
1358 | */ | |
1359 | BT_HIDDEN | |
1360 | enum bt_ctf_lttng_live_iterator_status lttng_live_get_new_streams( | |
1361 | struct lttng_live_session *session) | |
1362 | { | |
1363 | enum bt_ctf_lttng_live_iterator_status status = | |
1364 | BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK; | |
1365 | struct lttng_viewer_cmd cmd; | |
1366 | struct lttng_viewer_new_streams_request rq; | |
1367 | struct lttng_viewer_new_streams_response rp; | |
1368 | ssize_t ret_len; | |
1369 | struct lttng_live_component *lttng_live = session->lttng_live; | |
1370 | struct bt_live_viewer_connection *viewer_connection = | |
1371 | lttng_live->viewer_connection; | |
1372 | uint32_t streams_count; | |
1373 | ||
1374 | if (!session->new_streams_needed) { | |
1375 | return BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK; | |
1376 | } | |
1377 | ||
1378 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_NEW_STREAMS); | |
1379 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); | |
1380 | cmd.cmd_version = htobe32(0); | |
1381 | ||
1382 | memset(&rq, 0, sizeof(rq)); | |
1383 | rq.session_id = htobe64(session->id); | |
1384 | ||
1385 | ret_len = lttng_live_send(viewer_connection->control_sock, &cmd, sizeof(cmd)); | |
1386 | if (ret_len < 0) { | |
1387 | PERR("Error sending cmd: %s\n", strerror(errno)); | |
1388 | goto error; | |
1389 | } | |
1390 | assert(ret_len == sizeof(cmd)); | |
1391 | ||
1392 | ret_len = lttng_live_send(viewer_connection->control_sock, &rq, sizeof(rq)); | |
1393 | if (ret_len < 0) { | |
1394 | PERR("Error sending get_new_streams request: %s\n", strerror(errno)); | |
1395 | goto error; | |
1396 | } | |
1397 | assert(ret_len == sizeof(rq)); | |
1398 | ||
1399 | ret_len = lttng_live_recv(viewer_connection->control_sock, &rp, sizeof(rp)); | |
1400 | if (ret_len == 0) { | |
1401 | PERR("Remote side has closed connection\n"); | |
1402 | goto error; | |
1403 | } | |
1404 | if (ret_len < 0) { | |
1405 | PERR("Error receiving get_new_streams response\n"); | |
1406 | goto error; | |
1407 | } | |
1408 | assert(ret_len == sizeof(rp)); | |
1409 | ||
1410 | streams_count = be32toh(rp.streams_count); | |
1411 | ||
1412 | switch(be32toh(rp.status)) { | |
1413 | case LTTNG_VIEWER_NEW_STREAMS_OK: | |
1414 | session->new_streams_needed = false; | |
1415 | break; | |
1416 | case LTTNG_VIEWER_NEW_STREAMS_NO_NEW: | |
1417 | session->new_streams_needed = false; | |
1418 | goto end; | |
1419 | case LTTNG_VIEWER_NEW_STREAMS_HUP: | |
1420 | session->new_streams_needed = false; | |
1421 | session->closed = true; | |
1422 | status = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_END; | |
1423 | goto end; | |
1424 | case LTTNG_VIEWER_NEW_STREAMS_ERR: | |
1425 | PERR("get_new_streams error\n"); | |
1426 | goto error; | |
1427 | default: | |
1428 | PERR("Unknown return code %u\n", be32toh(rp.status)); | |
1429 | goto error; | |
1430 | } | |
1431 | ||
1432 | if (receive_streams(session, streams_count)) { | |
1433 | goto error; | |
1434 | } | |
1435 | end: | |
1436 | return status; | |
1437 | ||
1438 | error: | |
1439 | status = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_ERROR; | |
1440 | return status; | |
1441 | } | |
1442 | ||
1443 | BT_HIDDEN | |
1444 | struct bt_live_viewer_connection * | |
1445 | bt_live_viewer_connection_create(const char *url, FILE *error_fp) | |
1446 | { | |
1447 | struct bt_live_viewer_connection *viewer_connection; | |
1448 | ||
1449 | viewer_connection = g_new0(struct bt_live_viewer_connection, 1); | |
1450 | ||
1451 | bt_object_init(&viewer_connection->obj, connection_release); | |
1452 | viewer_connection->control_sock = -1; | |
1453 | viewer_connection->port = -1; | |
1454 | viewer_connection->error_fp = error_fp; | |
1455 | viewer_connection->url = g_string_new(url); | |
1456 | if (!viewer_connection->url) { | |
1457 | goto error; | |
1458 | } | |
1459 | ||
1460 | PDBG("Establishing connection to url \"%s\"...\n", url); | |
1461 | if (lttng_live_connect_viewer(viewer_connection)) { | |
1462 | goto error_report; | |
1463 | } | |
1464 | PDBG("Connection to url \"%s\" is established\n", url); | |
1465 | return viewer_connection; | |
1466 | ||
1467 | error_report: | |
1468 | printf_verbose("Failure to establish connection to url \"%s\"\n", url); | |
1469 | error: | |
1470 | g_free(viewer_connection); | |
1471 | return NULL; | |
1472 | } | |
1473 | ||
1474 | BT_HIDDEN | |
1475 | void bt_live_viewer_connection_destroy(struct bt_live_viewer_connection *viewer_connection) | |
1476 | { | |
1477 | PDBG("Closing connection to url \"%s\"\n", viewer_connection->url->str); | |
1478 | lttng_live_disconnect_viewer(viewer_connection); | |
1479 | g_string_free(viewer_connection->url, TRUE); | |
1480 | g_free(viewer_connection); | |
1481 | } |