Commit | Line | Data |
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12a91e9d JD |
1 | /* |
2 | * Copyright (C) 2013 - Julien Desfossez <jdesfossez@efficios.com> | |
3 | * Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
4 | * | |
5 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
6 | * of this software and associated documentation files (the "Software"), to deal | |
7 | * in the Software without restriction, including without limitation the rights | |
8 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
9 | * copies of the Software, and to permit persons to whom the Software is | |
10 | * furnished to do so, subject to the following conditions: | |
11 | * | |
12 | * The above copyright notice and this permission notice shall be included in | |
13 | * all copies or substantial portions of the Software. | |
14 | * | |
15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
18 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
20 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
21 | * SOFTWARE. | |
22 | */ | |
23 | ||
24 | #include <sys/socket.h> | |
25 | #include <sys/types.h> | |
26 | #include <netinet/in.h> | |
27 | #include <netdb.h> | |
28 | #include <stdio.h> | |
29 | #include <string.h> | |
30 | #include <stdlib.h> | |
31 | #include <unistd.h> | |
32 | #include <errno.h> | |
33 | #include <inttypes.h> | |
34 | #include <fcntl.h> | |
35 | #include <sys/mman.h> | |
36 | ||
37 | #include <babeltrace/ctf/ctf-index.h> | |
38 | ||
39 | #include <babeltrace/babeltrace.h> | |
40 | #include <babeltrace/ctf/events.h> | |
41 | #include <babeltrace/ctf/callbacks.h> | |
42 | #include <babeltrace/ctf/iterator.h> | |
43 | ||
44 | /* for packet_index */ | |
45 | #include <babeltrace/ctf/types.h> | |
46 | ||
47 | #include <babeltrace/ctf/metadata.h> | |
48 | #include <babeltrace/ctf-text/types.h> | |
49 | #include <babeltrace/ctf/events-internal.h> | |
50 | /* | |
51 | #include <formats/ctf/events-private.h> | |
d81179de | 52 | replaced with |
12a91e9d JD |
53 | */ |
54 | #include "network-live.h" | |
d81179de | 55 | #include "lttngtop.h" |
12a91e9d | 56 | |
3bac1a1f | 57 | #include "lttng-live-comm.h" |
0c445945 | 58 | #include "lttng-viewer-abi.h" |
12a91e9d JD |
59 | |
60 | /* | |
61 | * Memory allocation zeroed | |
62 | */ | |
63 | #define zmalloc(x) calloc(1, x) | |
64 | ||
65 | #ifndef max_t | |
66 | #define max_t(type, a, b) \ | |
67 | ((type) (a) > (type) (b) ? (type) (a) : (type) (b)) | |
68 | #endif | |
69 | ||
d81179de JD |
70 | static void ctf_live_packet_seek(struct bt_stream_pos *stream_pos, |
71 | size_t index, int whence); | |
72 | static void add_traces(gpointer key, gpointer value, gpointer user_data); | |
73 | static int del_traces(gpointer key, gpointer value, gpointer user_data); | |
74 | ||
75 | int lttng_live_connect_viewer(struct lttng_live_ctx *ctx) | |
12a91e9d JD |
76 | { |
77 | struct hostent *host; | |
78 | struct sockaddr_in server_addr; | |
79 | int ret; | |
80 | ||
d81179de | 81 | host = gethostbyname(ctx->relay_hostname); |
12a91e9d JD |
82 | if (!host) { |
83 | ret = -1; | |
84 | goto end; | |
85 | } | |
86 | ||
87 | if ((ctx->control_sock = socket(AF_INET, SOCK_STREAM, 0)) == -1) { | |
88 | perror("Socket"); | |
89 | ret = -1; | |
90 | goto end; | |
91 | } | |
92 | ||
93 | server_addr.sin_family = AF_INET; | |
d81179de | 94 | server_addr.sin_port = htons(ctx->port); |
12a91e9d JD |
95 | server_addr.sin_addr = *((struct in_addr *) host->h_addr); |
96 | bzero(&(server_addr.sin_zero), 8); | |
97 | ||
98 | if (connect(ctx->control_sock, (struct sockaddr *) &server_addr, | |
99 | sizeof(struct sockaddr)) == -1) { | |
100 | perror("Connect"); | |
101 | ret = -1; | |
102 | goto end; | |
103 | } | |
104 | ||
105 | ret = 0; | |
106 | ||
107 | end: | |
108 | return ret; | |
109 | } | |
110 | ||
111 | int lttng_live_establish_connection(struct lttng_live_ctx *ctx) | |
112 | { | |
113 | struct lttng_viewer_cmd cmd; | |
114 | struct lttng_viewer_connect connect; | |
115 | int ret; | |
116 | ssize_t ret_len; | |
117 | ||
118 | cmd.cmd = htobe32(LTTNG_VIEWER_CONNECT); | |
119 | cmd.data_size = sizeof(connect); | |
120 | cmd.cmd_version = 0; | |
121 | ||
122 | connect.viewer_session_id = -1ULL; /* will be set on recv */ | |
123 | connect.major = htobe32(LTTNG_LIVE_MAJOR); | |
124 | connect.minor = htobe32(LTTNG_LIVE_MINOR); | |
125 | connect.type = htobe32(LTTNG_VIEWER_CLIENT_COMMAND); | |
126 | ||
127 | do { | |
128 | ret_len = send(ctx->control_sock, &cmd, sizeof(cmd), 0); | |
129 | } while (ret_len < 0 && errno == EINTR); | |
130 | if (ret_len < 0) { | |
131 | fprintf(stderr, "[error] Error sending cmd\n"); | |
132 | ret = ret_len; | |
133 | goto error; | |
134 | } | |
135 | assert(ret_len == sizeof(cmd)); | |
136 | ||
137 | do { | |
138 | ret_len = send(ctx->control_sock, &connect, sizeof(connect), 0); | |
139 | } while (ret_len < 0 && errno == EINTR); | |
140 | if (ret_len < 0) { | |
141 | fprintf(stderr, "[error] Error sending version\n"); | |
142 | ret = ret_len; | |
143 | goto error; | |
144 | } | |
145 | assert(ret_len == sizeof(connect)); | |
146 | ||
147 | do { | |
148 | ret_len = recv(ctx->control_sock, &connect, sizeof(connect), 0); | |
149 | } while (ret_len < 0 && errno == EINTR); | |
150 | if (ret_len < 0) { | |
151 | fprintf(stderr, "[error] Error receiving version\n"); | |
152 | ret = ret_len; | |
153 | goto error; | |
154 | } | |
155 | assert(ret_len == sizeof(connect)); | |
156 | ||
157 | printf_verbose("Received viewer session ID : %" PRIu64 "\n", | |
158 | be64toh(connect.viewer_session_id)); | |
159 | printf_verbose("Relayd version : %u.%u\n", be32toh(connect.major), | |
160 | be32toh(connect.minor)); | |
161 | ||
162 | ret = 0; | |
163 | ||
164 | error: | |
165 | return ret; | |
166 | } | |
167 | ||
d81179de JD |
168 | static |
169 | void free_session_list(GPtrArray *session_list) | |
170 | { | |
171 | int i; | |
172 | struct lttng_live_relay_session *relay_session; | |
173 | ||
174 | for (i = 0; i < session_list->len; i++) { | |
175 | relay_session = g_ptr_array_index(session_list, i); | |
176 | free(relay_session->name); | |
177 | free(relay_session->hostname); | |
178 | } | |
179 | g_ptr_array_free(session_list, TRUE); | |
180 | } | |
181 | ||
182 | static | |
183 | void print_session_list(GPtrArray *session_list, const char *path) | |
184 | { | |
185 | int i; | |
186 | struct lttng_live_relay_session *relay_session; | |
187 | ||
188 | for (i = 0; i < session_list->len; i++) { | |
189 | relay_session = g_ptr_array_index(session_list, i); | |
190 | fprintf(stdout, "%s/host/%s/%s (timer = %u, " | |
191 | "%u stream(s), %u client(s) connected)\n", | |
192 | path, relay_session->hostname, | |
193 | relay_session->name, relay_session->timer, | |
194 | relay_session->streams, relay_session->clients); | |
195 | } | |
196 | } | |
197 | ||
198 | static | |
199 | void update_session_list(GPtrArray *session_list, char *hostname, | |
200 | char *session_name, uint32_t streams, uint32_t clients, | |
201 | uint32_t timer) | |
202 | { | |
203 | int i, found = 0; | |
204 | struct lttng_live_relay_session *relay_session; | |
205 | ||
206 | for (i = 0; i < session_list->len; i++) { | |
207 | relay_session = g_ptr_array_index(session_list, i); | |
208 | if ((strncmp(relay_session->hostname, hostname, NAME_MAX) == 0) && | |
209 | strncmp(relay_session->name, | |
210 | session_name, NAME_MAX) == 0) { | |
211 | relay_session->streams += streams; | |
212 | if (relay_session->clients < clients) | |
213 | relay_session->clients = clients; | |
214 | found = 1; | |
215 | break; | |
216 | } | |
217 | } | |
218 | if (found) | |
219 | return; | |
220 | ||
221 | relay_session = g_new0(struct lttng_live_relay_session, 1); | |
222 | relay_session->hostname = strndup(hostname, NAME_MAX); | |
223 | relay_session->name = strndup(session_name, NAME_MAX); | |
224 | relay_session->clients = clients; | |
225 | relay_session->streams = streams; | |
226 | relay_session->timer = timer; | |
227 | g_ptr_array_add(session_list, relay_session); | |
228 | } | |
229 | ||
12a91e9d JD |
230 | int lttng_live_list_sessions(struct lttng_live_ctx *ctx, const char *path) |
231 | { | |
232 | struct lttng_viewer_cmd cmd; | |
233 | struct lttng_viewer_list_sessions list; | |
234 | struct lttng_viewer_session lsession; | |
d81179de | 235 | int i, ret, sessions_count, print_list = 0; |
12a91e9d | 236 | ssize_t ret_len; |
d81179de JD |
237 | uint64_t session_id; |
238 | GPtrArray *session_list = NULL; | |
239 | ||
240 | if (strlen(ctx->session_name) == 0) { | |
241 | print_list = 1; | |
242 | session_list = g_ptr_array_new(); | |
243 | } | |
12a91e9d JD |
244 | |
245 | cmd.cmd = htobe32(LTTNG_VIEWER_LIST_SESSIONS); | |
246 | cmd.data_size = 0; | |
247 | cmd.cmd_version = 0; | |
248 | ||
249 | do { | |
250 | ret_len = send(ctx->control_sock, &cmd, sizeof(cmd), 0); | |
251 | } while (ret_len < 0 && errno == EINTR); | |
252 | if (ret_len < 0) { | |
253 | fprintf(stderr, "[error] Error sending cmd\n"); | |
254 | ret = ret_len; | |
255 | goto error; | |
256 | } | |
257 | assert(ret_len == sizeof(cmd)); | |
258 | ||
259 | do { | |
260 | ret_len = recv(ctx->control_sock, &list, sizeof(list), 0); | |
261 | } while (ret_len < 0 && errno == EINTR); | |
262 | if (ret_len < 0) { | |
263 | fprintf(stderr, "[error] Error receiving session list\n"); | |
264 | ret = ret_len; | |
265 | goto error; | |
266 | } | |
267 | assert(ret_len == sizeof(list)); | |
268 | ||
269 | sessions_count = be32toh(list.sessions_count); | |
12a91e9d JD |
270 | for (i = 0; i < sessions_count; i++) { |
271 | do { | |
272 | ret_len = recv(ctx->control_sock, &lsession, sizeof(lsession), 0); | |
273 | } while (ret_len < 0 && errno == EINTR); | |
274 | if (ret_len < 0) { | |
275 | fprintf(stderr, "[error] Error receiving session\n"); | |
276 | ret = ret_len; | |
277 | goto error; | |
278 | } | |
279 | assert(ret_len == sizeof(lsession)); | |
280 | lsession.hostname[LTTNG_VIEWER_HOST_NAME_MAX - 1] = '\0'; | |
281 | lsession.session_name[LTTNG_VIEWER_NAME_MAX - 1] = '\0'; | |
d81179de JD |
282 | session_id = be64toh(lsession.id); |
283 | ||
284 | if (print_list) { | |
285 | update_session_list(session_list, | |
286 | lsession.hostname, | |
287 | lsession.session_name, | |
288 | be32toh(lsession.streams), | |
289 | be32toh(lsession.clients), | |
290 | be32toh(lsession.live_timer)); | |
291 | } else { | |
292 | if ((strncmp(lsession.session_name, ctx->session_name, | |
293 | NAME_MAX) == 0) && (strncmp(lsession.hostname, | |
294 | ctx->traced_hostname, NAME_MAX) == 0)) { | |
295 | printf_verbose("Reading from session %" PRIu64 "\n", | |
296 | session_id); | |
297 | g_array_append_val(ctx->session_ids, | |
298 | session_id); | |
299 | } | |
300 | } | |
301 | } | |
12a91e9d | 302 | |
d81179de JD |
303 | if (print_list) { |
304 | print_session_list(session_list, path); | |
305 | free_session_list(session_list); | |
12a91e9d JD |
306 | } |
307 | ||
308 | ret = 0; | |
309 | ||
310 | error: | |
311 | return ret; | |
312 | } | |
313 | ||
314 | int lttng_live_ctf_trace_assign(struct lttng_live_viewer_stream *stream, | |
315 | uint64_t ctf_trace_id) | |
316 | { | |
317 | struct lttng_live_ctf_trace *trace; | |
318 | int ret = 0; | |
319 | ||
320 | trace = g_hash_table_lookup(stream->session->ctf_traces, | |
321 | (gpointer) ctf_trace_id); | |
322 | if (!trace) { | |
323 | trace = g_new0(struct lttng_live_ctf_trace, 1); | |
324 | trace->ctf_trace_id = ctf_trace_id; | |
325 | trace->streams = g_ptr_array_new(); | |
326 | g_hash_table_insert(stream->session->ctf_traces, | |
327 | (gpointer) ctf_trace_id, | |
328 | trace); | |
329 | } | |
330 | if (stream->metadata_flag) | |
331 | trace->metadata_stream = stream; | |
332 | ||
333 | stream->ctf_trace = trace; | |
334 | g_ptr_array_add(trace->streams, stream); | |
335 | ||
336 | return ret; | |
337 | } | |
338 | ||
339 | int lttng_live_attach_session(struct lttng_live_ctx *ctx, uint64_t id) | |
340 | { | |
341 | struct lttng_viewer_cmd cmd; | |
342 | struct lttng_viewer_attach_session_request rq; | |
343 | struct lttng_viewer_attach_session_response rp; | |
344 | struct lttng_viewer_stream stream; | |
345 | int ret, i; | |
346 | ssize_t ret_len; | |
347 | ||
348 | cmd.cmd = htobe32(LTTNG_VIEWER_ATTACH_SESSION); | |
349 | cmd.data_size = sizeof(rq); | |
350 | cmd.cmd_version = 0; | |
351 | ||
352 | memset(&rq, 0, sizeof(rq)); | |
353 | rq.session_id = htobe64(id); | |
354 | // TODO: add cmd line parameter to select seek beginning | |
355 | // rq.seek = htobe32(LTTNG_VIEWER_SEEK_BEGINNING); | |
356 | rq.seek = htobe32(LTTNG_VIEWER_SEEK_LAST); | |
357 | ||
358 | do { | |
359 | ret_len = send(ctx->control_sock, &cmd, sizeof(cmd), 0); | |
360 | } while (ret_len < 0 && errno == EINTR); | |
361 | if (ret_len < 0) { | |
362 | fprintf(stderr, "[error] Error sending cmd\n"); | |
363 | ret = ret_len; | |
364 | goto error; | |
365 | } | |
366 | assert(ret_len == sizeof(cmd)); | |
367 | ||
368 | do { | |
369 | ret_len = send(ctx->control_sock, &rq, sizeof(rq), 0); | |
370 | } while (ret_len < 0 && errno == EINTR); | |
371 | if (ret_len < 0) { | |
372 | fprintf(stderr, "[error] Error sending attach request\n"); | |
373 | ret = ret_len; | |
374 | goto error; | |
375 | } | |
376 | assert(ret_len == sizeof(rq)); | |
377 | ||
378 | do { | |
379 | ret_len = recv(ctx->control_sock, &rp, sizeof(rp), 0); | |
380 | } while (ret_len < 0 && errno == EINTR); | |
381 | if (ret_len < 0) { | |
382 | fprintf(stderr, "[error] Error receiving attach response\n"); | |
383 | ret = ret_len; | |
384 | goto error; | |
385 | } | |
386 | assert(ret_len == sizeof(rp)); | |
387 | ||
388 | switch(be32toh(rp.status)) { | |
389 | case LTTNG_VIEWER_ATTACH_OK: | |
390 | break; | |
391 | case LTTNG_VIEWER_ATTACH_UNK: | |
392 | ret = -LTTNG_VIEWER_ATTACH_UNK; | |
393 | goto end; | |
394 | case LTTNG_VIEWER_ATTACH_ALREADY: | |
395 | fprintf(stderr, "[error] Already a viewer attached\n"); | |
396 | ret = -1; | |
397 | goto end; | |
398 | case LTTNG_VIEWER_ATTACH_NOT_LIVE: | |
399 | fprintf(stderr, "[error] Not a live session\n"); | |
400 | ret = -1; | |
401 | goto end; | |
402 | case LTTNG_VIEWER_ATTACH_SEEK_ERR: | |
403 | fprintf(stderr, "[error] Wrong seek parameter\n"); | |
404 | ret = -1; | |
405 | goto end; | |
406 | default: | |
407 | fprintf(stderr, "[error] Unknown attach return code %u\n", | |
408 | be32toh(rp.status)); | |
409 | ret = -1; | |
410 | goto end; | |
411 | } | |
412 | if (be32toh(rp.status) != LTTNG_VIEWER_ATTACH_OK) { | |
413 | ret = -1; | |
414 | goto end; | |
415 | } | |
416 | ||
d81179de | 417 | ctx->session->stream_count += be32toh(rp.streams_count); |
12a91e9d JD |
418 | /* |
419 | * When the session is created but not started, we do an active wait | |
420 | * until it starts. It allows the viewer to start processing the trace | |
421 | * as soon as the session starts. | |
422 | */ | |
423 | if (ctx->session->stream_count == 0) { | |
424 | ret = 0; | |
425 | goto end; | |
426 | } | |
8fe4d0cf JD |
427 | printf_verbose("Waiting for %u streams:\n", |
428 | be32toh(rp.streams_count)); | |
12a91e9d JD |
429 | ctx->session->streams = g_new0(struct lttng_live_viewer_stream, |
430 | ctx->session->stream_count); | |
431 | for (i = 0; i < be32toh(rp.streams_count); i++) { | |
432 | do { | |
433 | ret_len = recv(ctx->control_sock, &stream, sizeof(stream), 0); | |
434 | } while (ret_len < 0 && errno == EINTR); | |
435 | if (ret_len < 0) { | |
436 | fprintf(stderr, "[error] Error receiving stream\n"); | |
437 | ret = ret_len; | |
438 | goto error; | |
439 | } | |
440 | assert(ret_len == sizeof(stream)); | |
441 | stream.path_name[LTTNG_VIEWER_PATH_MAX - 1] = '\0'; | |
442 | stream.channel_name[LTTNG_VIEWER_NAME_MAX - 1] = '\0'; | |
443 | ||
444 | printf_verbose(" stream %" PRIu64 " : %s/%s\n", | |
445 | be64toh(stream.id), stream.path_name, | |
446 | stream.channel_name); | |
447 | ctx->session->streams[i].id = be64toh(stream.id); | |
448 | ctx->session->streams[i].session = ctx->session; | |
449 | ||
450 | ctx->session->streams[i].first_read = 1; | |
451 | ctx->session->streams[i].mmap_size = 0; | |
452 | ||
453 | if (be32toh(stream.metadata_flag)) { | |
454 | char *path; | |
455 | ||
456 | path = strdup(LTTNG_METADATA_PATH_TEMPLATE); | |
457 | if (!path) { | |
458 | perror("strdup"); | |
459 | ret = -1; | |
460 | goto error; | |
461 | } | |
462 | if (!mkdtemp(path)) { | |
463 | perror("mkdtemp"); | |
464 | free(path); | |
465 | ret = -1; | |
466 | goto error; | |
467 | } | |
468 | ctx->session->streams[i].metadata_flag = 1; | |
469 | snprintf(ctx->session->streams[i].path, | |
470 | sizeof(ctx->session->streams[i].path), | |
471 | "%s/%s", path, | |
472 | stream.channel_name); | |
473 | ret = open(ctx->session->streams[i].path, | |
474 | O_WRONLY | O_CREAT | O_TRUNC, | |
475 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
476 | if (ret < 0) { | |
477 | perror("open"); | |
478 | free(path); | |
479 | goto error; | |
480 | } | |
481 | ctx->session->streams[i].fd = ret; | |
482 | free(path); | |
483 | } | |
484 | ret = lttng_live_ctf_trace_assign(&ctx->session->streams[i], | |
485 | be64toh(stream.ctf_trace_id)); | |
486 | if (ret < 0) { | |
487 | goto error; | |
488 | } | |
489 | ||
490 | } | |
491 | ret = 0; | |
492 | ||
493 | end: | |
494 | error: | |
495 | return ret; | |
496 | } | |
497 | ||
d81179de JD |
498 | static |
499 | int ask_new_streams(struct lttng_live_ctx *ctx) | |
500 | { | |
501 | int i, ret = 0; | |
502 | uint64_t id; | |
503 | ||
504 | restart: | |
505 | for (i = 0; i < ctx->session_ids->len; i++) { | |
506 | id = g_array_index(ctx->session_ids, uint64_t, i); | |
507 | ret = lttng_live_get_new_streams(ctx, id); | |
508 | printf_verbose("Asking for new streams returns %d\n", | |
509 | ret); | |
510 | if (ret < 0) { | |
511 | if (ret == -LTTNG_VIEWER_NEW_STREAMS_HUP) { | |
512 | printf_verbose("Session %" PRIu64 " closed\n", | |
513 | id); | |
514 | /* | |
515 | * The streams have already been closed during | |
516 | * the reading, so we only need to get rid of | |
517 | * the trace in our internal table of sessions. | |
518 | */ | |
519 | g_array_remove_index(ctx->session_ids, i); | |
520 | /* | |
521 | * We can't continue iterating on the g_array | |
522 | * after a remove, we have to start again. | |
523 | */ | |
524 | goto restart; | |
525 | } else { | |
526 | ret = -1; | |
527 | goto end; | |
528 | } | |
529 | } | |
530 | } | |
531 | ||
532 | end: | |
533 | return ret; | |
534 | } | |
535 | ||
12a91e9d JD |
536 | static |
537 | int get_data_packet(struct lttng_live_ctx *ctx, | |
538 | struct ctf_stream_pos *pos, | |
539 | struct lttng_live_viewer_stream *stream, uint64_t offset, | |
540 | uint64_t len) | |
541 | { | |
542 | struct lttng_viewer_cmd cmd; | |
543 | struct lttng_viewer_get_packet rq; | |
544 | struct lttng_viewer_trace_packet rp; | |
545 | ssize_t ret_len; | |
546 | int ret; | |
547 | ||
548 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_PACKET); | |
549 | cmd.data_size = sizeof(rq); | |
550 | cmd.cmd_version = 0; | |
551 | ||
552 | memset(&rq, 0, sizeof(rq)); | |
553 | rq.stream_id = htobe64(stream->id); | |
554 | /* Already in big endian. */ | |
555 | rq.offset = offset; | |
556 | rq.len = htobe32(len); | |
557 | ||
558 | do { | |
559 | ret_len = send(ctx->control_sock, &cmd, sizeof(cmd), 0); | |
560 | } while (ret_len < 0 && errno == EINTR); | |
561 | if (ret_len < 0) { | |
562 | fprintf(stderr, "[error] Error sending cmd\n"); | |
563 | ret = ret_len; | |
564 | goto error; | |
565 | } | |
566 | assert(ret_len == sizeof(cmd)); | |
567 | ||
568 | do { | |
569 | ret_len = send(ctx->control_sock, &rq, sizeof(rq), 0); | |
570 | } while (ret_len < 0 && errno == EINTR); | |
571 | if (ret_len < 0) { | |
572 | fprintf(stderr, "[error] Error sending get_data_packet request\n"); | |
573 | ret = ret_len; | |
574 | goto error; | |
575 | } | |
576 | assert(ret_len == sizeof(rq)); | |
577 | ||
578 | do { | |
579 | ret_len = recv(ctx->control_sock, &rp, sizeof(rp), 0); | |
580 | } while (ret_len < 0 && errno == EINTR); | |
581 | if (ret_len < 0) { | |
582 | fprintf(stderr, "[error] Error receiving data response\n"); | |
583 | ret = ret_len; | |
584 | goto error; | |
585 | } | |
586 | if (ret_len != sizeof(rp)) { | |
587 | fprintf(stderr, "[error] get_data_packet: expected %" PRId64 | |
588 | ", received %" PRId64 "\n", ret_len, | |
589 | sizeof(rp)); | |
590 | ret = -1; | |
591 | goto error; | |
592 | } | |
593 | ||
594 | rp.flags = be32toh(rp.flags); | |
595 | ||
596 | switch (be32toh(rp.status)) { | |
597 | case LTTNG_VIEWER_GET_PACKET_OK: | |
598 | len = be32toh(rp.len); | |
599 | printf_verbose("get_data_packet: Ok, packet size : %" PRIu64 | |
600 | "\n", len); | |
601 | break; | |
602 | case LTTNG_VIEWER_GET_PACKET_RETRY: | |
603 | printf_verbose("get_data_packet: retry\n"); | |
604 | ret = -1; | |
605 | goto end; | |
606 | case LTTNG_VIEWER_GET_PACKET_ERR: | |
607 | if (rp.flags & LTTNG_VIEWER_FLAG_NEW_METADATA) { | |
608 | printf_verbose("get_data_packet: new metadata needed\n"); | |
609 | ret = 0; | |
610 | goto end; | |
611 | } | |
d81179de | 612 | if (rp.flags & LTTNG_VIEWER_FLAG_NEW_STREAM) { |
8fe4d0cf | 613 | printf_verbose("get_data_packet: new streams needed\n"); |
d81179de JD |
614 | ret = ask_new_streams(ctx); |
615 | if (ret < 0) | |
616 | goto error; | |
617 | g_hash_table_foreach(ctx->session->ctf_traces, add_traces, | |
618 | ctx->bt_ctx); | |
8fe4d0cf JD |
619 | ret = 0; |
620 | goto end; | |
d81179de | 621 | } |
12a91e9d JD |
622 | fprintf(stderr, "[error] get_data_packet: error\n"); |
623 | ret = -1; | |
624 | goto end; | |
625 | case LTTNG_VIEWER_GET_PACKET_EOF: | |
626 | ret = -2; | |
627 | goto error; | |
628 | default: | |
629 | printf_verbose("get_data_packet: unknown\n"); | |
630 | assert(0); | |
631 | ret = -1; | |
632 | goto end; | |
633 | } | |
634 | ||
635 | if (len <= 0) { | |
636 | ret = -1; | |
637 | goto end; | |
638 | } | |
639 | ||
640 | if (len > stream->mmap_size) { | |
641 | uint64_t new_size; | |
642 | ||
643 | new_size = max_t(uint64_t, len, stream->mmap_size << 1); | |
644 | if (pos->base_mma) { | |
645 | /* unmap old base */ | |
646 | ret = munmap_align(pos->base_mma); | |
647 | if (ret) { | |
648 | fprintf(stderr, "[error] Unable to unmap old base: %s.\n", | |
649 | strerror(errno)); | |
650 | ret = -1; | |
651 | goto error; | |
652 | } | |
653 | pos->base_mma = NULL; | |
654 | } | |
655 | pos->base_mma = mmap_align(new_size, | |
656 | PROT_READ | PROT_WRITE, | |
657 | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); | |
658 | if (pos->base_mma == MAP_FAILED) { | |
659 | fprintf(stderr, "[error] mmap error %s.\n", | |
660 | strerror(errno)); | |
661 | pos->base_mma = NULL; | |
662 | ret = -1; | |
663 | goto error; | |
664 | } | |
665 | ||
666 | stream->mmap_size = new_size; | |
667 | printf_verbose("Expanding stream mmap size to %" PRIu64 " bytes\n", | |
668 | stream->mmap_size); | |
669 | } | |
670 | ||
671 | do { | |
672 | ret_len = recv(ctx->control_sock, | |
673 | mmap_align_addr(pos->base_mma), len, | |
674 | MSG_WAITALL); | |
675 | } while (ret_len < 0 && errno == EINTR); | |
676 | if (ret_len < 0) { | |
677 | fprintf(stderr, "[error] Error receiving trace packet\n"); | |
678 | ret = ret_len; | |
679 | goto error; | |
680 | } | |
681 | assert(ret_len == len); | |
682 | ||
683 | end: | |
684 | error: | |
685 | return ret; | |
686 | } | |
687 | ||
688 | /* | |
689 | * Return number of metadata bytes written or a negative value on error. | |
690 | */ | |
691 | static | |
692 | int get_new_metadata(struct lttng_live_ctx *ctx, | |
693 | struct lttng_live_viewer_stream *viewer_stream, | |
694 | uint64_t *metadata_len) | |
695 | { | |
696 | uint64_t len = 0; | |
697 | int ret; | |
698 | struct lttng_viewer_cmd cmd; | |
699 | struct lttng_viewer_get_metadata rq; | |
700 | struct lttng_viewer_metadata_packet rp; | |
701 | struct lttng_live_viewer_stream *metadata_stream; | |
702 | char *data = NULL; | |
703 | ssize_t ret_len; | |
704 | ||
705 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_METADATA); | |
706 | cmd.data_size = sizeof(rq); | |
707 | cmd.cmd_version = 0; | |
708 | ||
709 | metadata_stream = viewer_stream->ctf_trace->metadata_stream; | |
710 | rq.stream_id = htobe64(metadata_stream->id); | |
711 | ||
712 | do { | |
713 | ret_len = send(ctx->control_sock, &cmd, sizeof(cmd), 0); | |
714 | } while (ret_len < 0 && errno == EINTR); | |
715 | if (ret_len < 0) { | |
716 | fprintf(stderr, "[error] Error sending cmd\n"); | |
717 | ret = ret_len; | |
718 | goto error; | |
719 | } | |
720 | assert(ret_len == sizeof(cmd)); | |
721 | ||
722 | do { | |
723 | ret_len = send(ctx->control_sock, &rq, sizeof(rq), 0); | |
724 | } while (ret_len < 0 && errno == EINTR); | |
725 | if (ret_len < 0) { | |
726 | fprintf(stderr, "[error] Error sending get_metadata request\n"); | |
727 | ret = ret_len; | |
728 | goto error; | |
729 | } | |
730 | assert(ret_len == sizeof(rq)); | |
731 | ||
732 | do { | |
733 | ret_len = recv(ctx->control_sock, &rp, sizeof(rp), 0); | |
734 | } while (ret_len < 0 && errno == EINTR); | |
735 | if (ret_len < 0) { | |
736 | fprintf(stderr, "[error] Error receiving metadata response\n"); | |
737 | ret = ret_len; | |
738 | goto error; | |
739 | } | |
740 | assert(ret_len == sizeof(rp)); | |
741 | ||
742 | switch (be32toh(rp.status)) { | |
743 | case LTTNG_VIEWER_METADATA_OK: | |
744 | printf_verbose("get_metadata : OK\n"); | |
745 | break; | |
746 | case LTTNG_VIEWER_NO_NEW_METADATA: | |
747 | printf_verbose("get_metadata : NO NEW\n"); | |
748 | ret = -1; | |
749 | goto end; | |
750 | case LTTNG_VIEWER_METADATA_ERR: | |
751 | printf_verbose("get_metadata : ERR\n"); | |
752 | ret = -1; | |
753 | goto end; | |
754 | default: | |
755 | printf_verbose("get_metadata : UNKNOWN\n"); | |
756 | ret = -1; | |
757 | goto end; | |
758 | } | |
759 | ||
760 | len = be64toh(rp.len); | |
761 | printf_verbose("Writing %" PRIu64" bytes to metadata\n", len); | |
762 | if (len <= 0) { | |
763 | ret = -1; | |
764 | goto end; | |
765 | } | |
766 | ||
767 | data = zmalloc(len); | |
768 | if (!data) { | |
769 | perror("relay data zmalloc"); | |
770 | ret = -1; | |
771 | goto error; | |
772 | } | |
773 | do { | |
774 | ret_len = recv(ctx->control_sock, data, len, MSG_WAITALL); | |
775 | } while (ret_len < 0 && errno == EINTR); | |
776 | if (ret_len < 0) { | |
777 | fprintf(stderr, "[error] Error receiving trace packet\n"); | |
778 | ret = ret_len; | |
779 | free(data); | |
780 | goto error; | |
781 | } | |
782 | assert(ret_len == len); | |
783 | ||
784 | do { | |
785 | ret_len = write(metadata_stream->fd, data, len); | |
786 | } while (ret_len < 0 && errno == EINTR); | |
787 | if (ret_len < 0) { | |
788 | free(data); | |
789 | ret = ret_len; | |
790 | goto error; | |
791 | } | |
792 | assert(ret_len == len); | |
793 | ||
794 | free(data); | |
795 | ||
796 | *metadata_len = len; | |
797 | ret = 0; | |
798 | end: | |
799 | error: | |
800 | return ret; | |
801 | } | |
802 | ||
803 | /* | |
804 | * Get one index for a stream. | |
805 | * | |
806 | * Returns 0 on success or a negative value on error. | |
807 | */ | |
808 | static | |
809 | int get_next_index(struct lttng_live_ctx *ctx, | |
810 | struct lttng_live_viewer_stream *viewer_stream, | |
811 | struct packet_index *index) | |
812 | { | |
813 | struct lttng_viewer_cmd cmd; | |
814 | struct lttng_viewer_get_next_index rq; | |
815 | struct lttng_viewer_index rp; | |
816 | int ret; | |
817 | uint64_t metadata_len; | |
818 | ssize_t ret_len; | |
819 | ||
820 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_NEXT_INDEX); | |
821 | cmd.data_size = sizeof(rq); | |
822 | cmd.cmd_version = 0; | |
823 | ||
824 | memset(&rq, 0, sizeof(rq)); | |
825 | rq.stream_id = htobe64(viewer_stream->id); | |
826 | ||
827 | retry: | |
828 | do { | |
829 | ret_len = send(ctx->control_sock, &cmd, sizeof(cmd), 0); | |
830 | } while (ret_len < 0 && errno == EINTR); | |
831 | if (ret_len < 0) { | |
832 | fprintf(stderr, "[error] Error sending cmd\n"); | |
833 | ret = ret_len; | |
834 | goto error; | |
835 | } | |
836 | assert(ret_len == sizeof(cmd)); | |
837 | ||
838 | do { | |
839 | ret_len = send(ctx->control_sock, &rq, sizeof(rq), 0); | |
840 | } while (ret_len < 0 && errno == EINTR); | |
841 | if (ret_len < 0) { | |
842 | fprintf(stderr, "[error] Error sending get_next_index request\n"); | |
843 | ret = ret_len; | |
844 | goto error; | |
845 | } | |
846 | assert(ret_len == sizeof(rq)); | |
847 | ||
848 | do { | |
849 | ret_len = recv(ctx->control_sock, &rp, sizeof(rp), 0); | |
850 | } while (ret_len < 0 && errno == EINTR); | |
851 | if (ret_len < 0) { | |
852 | fprintf(stderr, "[error] Error receiving index response\n"); | |
853 | ret = ret_len; | |
854 | goto error; | |
855 | } | |
856 | assert(ret_len == sizeof(rp)); | |
857 | ||
858 | rp.flags = be32toh(rp.flags); | |
859 | ||
860 | switch (be32toh(rp.status)) { | |
861 | case LTTNG_VIEWER_INDEX_INACTIVE: | |
862 | printf_verbose("get_next_index: inactive\n"); | |
863 | memset(index, 0, sizeof(struct packet_index)); | |
3bac1a1f | 864 | index->ts_cycles.timestamp_end = be64toh(rp.timestamp_end); |
12a91e9d JD |
865 | break; |
866 | case LTTNG_VIEWER_INDEX_OK: | |
867 | printf_verbose("get_next_index: Ok, need metadata update : %u\n", | |
868 | rp.flags & LTTNG_VIEWER_FLAG_NEW_METADATA); | |
869 | index->offset = be64toh(rp.offset); | |
870 | index->packet_size = be64toh(rp.packet_size); | |
871 | index->content_size = be64toh(rp.content_size); | |
3bac1a1f JD |
872 | index->ts_cycles.timestamp_begin = be64toh(rp.timestamp_begin); |
873 | index->ts_cycles.timestamp_end = be64toh(rp.timestamp_end); | |
12a91e9d JD |
874 | index->events_discarded = be64toh(rp.events_discarded); |
875 | ||
876 | if (rp.flags & LTTNG_VIEWER_FLAG_NEW_METADATA) { | |
877 | printf_verbose("get_next_index: new metadata needed\n"); | |
878 | ret = get_new_metadata(ctx, viewer_stream, | |
879 | &metadata_len); | |
880 | if (ret < 0) { | |
881 | goto error; | |
882 | } | |
883 | } | |
d81179de JD |
884 | if (rp.flags & LTTNG_VIEWER_FLAG_NEW_STREAM) { |
885 | ret = ask_new_streams(ctx); | |
886 | if (ret < 0) | |
887 | goto error; | |
888 | g_hash_table_foreach(ctx->session->ctf_traces, add_traces, | |
889 | ctx->bt_ctx); | |
890 | } | |
12a91e9d JD |
891 | break; |
892 | case LTTNG_VIEWER_INDEX_RETRY: | |
893 | printf_verbose("get_next_index: retry\n"); | |
71ba9228 | 894 | sleep(0.1); |
12a91e9d JD |
895 | goto retry; |
896 | case LTTNG_VIEWER_INDEX_HUP: | |
897 | printf_verbose("get_next_index: stream hung up\n"); | |
898 | viewer_stream->id = -1ULL; | |
899 | viewer_stream->fd = -1; | |
900 | index->offset = EOF; | |
d81179de | 901 | ctx->session->stream_count--; |
12a91e9d JD |
902 | break; |
903 | case LTTNG_VIEWER_INDEX_ERR: | |
904 | fprintf(stderr, "[error] get_next_index: error\n"); | |
905 | ret = -1; | |
906 | goto error; | |
907 | default: | |
908 | fprintf(stderr, "[error] get_next_index: unkwown value\n"); | |
909 | ret = -1; | |
910 | goto error; | |
911 | } | |
912 | ||
913 | ret = 0; | |
914 | ||
915 | error: | |
916 | return ret; | |
917 | } | |
918 | ||
d81179de | 919 | static |
12a91e9d JD |
920 | void ctf_live_packet_seek(struct bt_stream_pos *stream_pos, size_t index, |
921 | int whence) | |
922 | { | |
923 | struct ctf_stream_pos *pos; | |
924 | struct ctf_file_stream *file_stream; | |
3bac1a1f | 925 | struct packet_index *prev_index = NULL, *cur_index; |
12a91e9d JD |
926 | struct lttng_live_viewer_stream *viewer_stream; |
927 | struct lttng_live_session *session; | |
928 | int ret; | |
929 | ||
930 | retry: | |
931 | pos = ctf_pos(stream_pos); | |
932 | file_stream = container_of(pos, struct ctf_file_stream, pos); | |
933 | viewer_stream = (struct lttng_live_viewer_stream *) pos->priv; | |
934 | session = viewer_stream->session; | |
935 | ||
3bac1a1f JD |
936 | switch (pos->packet_index->len) { |
937 | case 0: | |
938 | g_array_set_size(pos->packet_index, 1); | |
939 | cur_index = &g_array_index(pos->packet_index, | |
940 | struct packet_index, 0); | |
941 | break; | |
942 | case 1: | |
943 | g_array_set_size(pos->packet_index, 2); | |
944 | prev_index = &g_array_index(pos->packet_index, | |
945 | struct packet_index, 0); | |
946 | cur_index = &g_array_index(pos->packet_index, | |
947 | struct packet_index, 1); | |
948 | break; | |
949 | case 2: | |
950 | g_array_index(pos->packet_index, | |
951 | struct packet_index, 0) = | |
952 | g_array_index(pos->packet_index, | |
953 | struct packet_index, 1); | |
954 | prev_index = &g_array_index(pos->packet_index, | |
955 | struct packet_index, 0); | |
956 | cur_index = &g_array_index(pos->packet_index, | |
957 | struct packet_index, 1); | |
958 | break; | |
959 | default: | |
960 | abort(); | |
961 | break; | |
962 | } | |
963 | ||
12a91e9d | 964 | printf_verbose("get_next_index for stream %" PRIu64 "\n", viewer_stream->id); |
3bac1a1f | 965 | ret = get_next_index(session->ctx, viewer_stream, cur_index); |
12a91e9d JD |
966 | if (ret < 0) { |
967 | pos->offset = EOF; | |
968 | fprintf(stderr, "[error] get_next_index failed\n"); | |
969 | return; | |
970 | } | |
971 | ||
3bac1a1f JD |
972 | pos->packet_size = cur_index->packet_size; |
973 | pos->content_size = cur_index->content_size; | |
12a91e9d | 974 | pos->mmap_base_offset = 0; |
3bac1a1f | 975 | if (cur_index->offset == EOF) { |
12a91e9d JD |
976 | pos->offset = EOF; |
977 | } else { | |
978 | pos->offset = 0; | |
979 | } | |
980 | ||
3bac1a1f JD |
981 | if (cur_index->content_size == 0) { |
982 | file_stream->parent.cycles_timestamp = | |
983 | cur_index->ts_cycles.timestamp_end; | |
12a91e9d | 984 | file_stream->parent.real_timestamp = ctf_get_real_timestamp( |
3bac1a1f JD |
985 | &file_stream->parent, |
986 | cur_index->ts_cycles.timestamp_end); | |
12a91e9d | 987 | } else { |
3bac1a1f JD |
988 | /* Convert the timestamps and append to the real_index. */ |
989 | cur_index->ts_real.timestamp_begin = ctf_get_real_timestamp( | |
990 | &file_stream->parent, | |
991 | cur_index->ts_cycles.timestamp_begin); | |
992 | cur_index->ts_real.timestamp_end = ctf_get_real_timestamp( | |
993 | &file_stream->parent, | |
994 | cur_index->ts_cycles.timestamp_end); | |
995 | ||
996 | ctf_update_current_packet_index(&file_stream->parent, | |
997 | prev_index, cur_index); | |
998 | ||
999 | file_stream->parent.cycles_timestamp = | |
1000 | cur_index->ts_cycles.timestamp_begin; | |
1001 | file_stream->parent.real_timestamp = | |
1002 | cur_index->ts_real.timestamp_begin; | |
12a91e9d JD |
1003 | } |
1004 | ||
1005 | if (pos->packet_size == 0 || pos->offset == EOF) { | |
1006 | goto end; | |
1007 | } | |
1008 | ||
1009 | printf_verbose("get_data_packet for stream %" PRIu64 "\n", | |
1010 | viewer_stream->id); | |
1011 | ret = get_data_packet(session->ctx, pos, viewer_stream, | |
3bac1a1f JD |
1012 | be64toh(cur_index->offset), |
1013 | cur_index->packet_size / CHAR_BIT); | |
12a91e9d JD |
1014 | if (ret == -2) { |
1015 | goto retry; | |
1016 | } else if (ret < 0) { | |
1017 | pos->offset = EOF; | |
1018 | fprintf(stderr, "[error] get_data_packet failed\n"); | |
1019 | return; | |
1020 | } | |
1021 | ||
1022 | printf_verbose("Index received : packet_size : %" PRIu64 | |
1023 | ", offset %" PRIu64 ", content_size %" PRIu64 | |
1024 | ", timestamp_end : %" PRIu64 "\n", | |
3bac1a1f JD |
1025 | cur_index->packet_size, cur_index->offset, |
1026 | cur_index->content_size, | |
1027 | cur_index->ts_cycles.timestamp_end); | |
12a91e9d JD |
1028 | |
1029 | /* update trace_packet_header and stream_packet_context */ | |
1030 | if (pos->prot != PROT_WRITE && file_stream->parent.trace_packet_header) { | |
1031 | /* Read packet header */ | |
1032 | ret = generic_rw(&pos->parent, &file_stream->parent.trace_packet_header->p); | |
1033 | if (ret) { | |
1034 | pos->offset = EOF; | |
1035 | fprintf(stderr, "[error] trace packet header read failed\n"); | |
1036 | goto end; | |
1037 | } | |
1038 | } | |
1039 | if (pos->prot != PROT_WRITE && file_stream->parent.stream_packet_context) { | |
1040 | /* Read packet context */ | |
1041 | ret = generic_rw(&pos->parent, &file_stream->parent.stream_packet_context->p); | |
1042 | if (ret) { | |
1043 | pos->offset = EOF; | |
1044 | fprintf(stderr, "[error] stream packet context read failed\n"); | |
1045 | goto end; | |
1046 | } | |
1047 | } | |
1048 | pos->data_offset = pos->offset; | |
1049 | ||
1050 | end: | |
1051 | return; | |
1052 | } | |
1053 | ||
d81179de JD |
1054 | int lttng_live_create_viewer_session(struct lttng_live_ctx *ctx) |
1055 | { | |
1056 | struct lttng_viewer_cmd cmd; | |
1057 | struct lttng_viewer_create_session_response resp; | |
1058 | int ret; | |
1059 | ssize_t ret_len; | |
1060 | ||
1061 | cmd.cmd = htobe32(LTTNG_VIEWER_CREATE_SESSION); | |
1062 | cmd.data_size = 0; | |
1063 | cmd.cmd_version = 0; | |
1064 | ||
1065 | do { | |
1066 | ret_len = send(ctx->control_sock, &cmd, sizeof(cmd), 0); | |
1067 | } while (ret_len < 0 && errno == EINTR); | |
1068 | if (ret_len < 0) { | |
1069 | fprintf(stderr, "[error] Error sending cmd\n"); | |
1070 | ret = ret_len; | |
1071 | goto error; | |
1072 | } | |
1073 | assert(ret_len == sizeof(cmd)); | |
1074 | ||
1075 | do { | |
1076 | ret_len = recv(ctx->control_sock, &resp, sizeof(resp), 0); | |
1077 | } while (ret_len < 0 && errno == EINTR); | |
1078 | if (ret_len < 0) { | |
1079 | fprintf(stderr, "[error] Error receiving create session reply\n"); | |
1080 | ret = ret_len; | |
1081 | goto error; | |
1082 | } | |
1083 | assert(ret_len == sizeof(resp)); | |
1084 | ||
1085 | if (be32toh(resp.status) != LTTNG_VIEWER_CREATE_SESSION_OK) { | |
1086 | fprintf(stderr, "[error] Error creating viewer session\n"); | |
1087 | ret = -1; | |
1088 | goto error; | |
1089 | } | |
1090 | ret = 0; | |
1091 | ||
1092 | error: | |
1093 | return ret; | |
1094 | } | |
1095 | ||
1096 | static | |
1097 | int del_traces(gpointer key, gpointer value, gpointer user_data) | |
12a91e9d JD |
1098 | { |
1099 | struct bt_context *bt_ctx = user_data; | |
1100 | struct lttng_live_ctf_trace *trace = value; | |
1101 | int ret; | |
1102 | ||
1103 | ret = bt_context_remove_trace(bt_ctx, trace->trace_id); | |
1104 | if (ret < 0) | |
1105 | fprintf(stderr, "[error] removing trace from context\n"); | |
1106 | ||
1107 | /* remove the key/value pair from the HT. */ | |
1108 | return 1; | |
1109 | } | |
1110 | ||
d81179de JD |
1111 | static |
1112 | void add_traces(gpointer key, gpointer value, gpointer user_data) | |
12a91e9d JD |
1113 | { |
1114 | int i, ret, total_metadata = 0; | |
1115 | uint64_t metadata_len; | |
1116 | struct bt_context *bt_ctx = user_data; | |
1117 | struct lttng_live_ctf_trace *trace = value; | |
1118 | struct lttng_live_viewer_stream *stream; | |
1119 | struct bt_mmap_stream *new_mmap_stream; | |
1120 | struct bt_mmap_stream_list mmap_list; | |
1121 | struct lttng_live_ctx *ctx = NULL; | |
1122 | ||
d81179de JD |
1123 | /* |
1124 | * We don't know how many streams we will receive for a trace, so | |
1125 | * once we are done receiving the traces, we add all the traces | |
1126 | * received to the bt_context. | |
1127 | * We can receive streams during the attach command or the | |
1128 | * get_new_streams, so we have to make sure not to add multiple | |
1129 | * times the same traces. | |
1130 | * If a trace is already in the context, we just skip this function. | |
1131 | */ | |
1132 | if (trace->in_use) | |
1133 | return; | |
1134 | ||
12a91e9d JD |
1135 | BT_INIT_LIST_HEAD(&mmap_list.head); |
1136 | ||
1137 | for (i = 0; i < trace->streams->len; i++) { | |
1138 | stream = g_ptr_array_index(trace->streams, i); | |
1139 | ctx = stream->session->ctx; | |
1140 | ||
1141 | if (!stream->metadata_flag) { | |
1142 | new_mmap_stream = zmalloc(sizeof(struct bt_mmap_stream)); | |
1143 | new_mmap_stream->priv = (void *) stream; | |
1144 | new_mmap_stream->fd = -1; | |
1145 | bt_list_add(&new_mmap_stream->list, &mmap_list.head); | |
1146 | } else { | |
1147 | /* Get all possible metadata before starting */ | |
1148 | do { | |
1149 | ret = get_new_metadata(ctx, stream, | |
1150 | &metadata_len); | |
1151 | if (ret == 0) { | |
1152 | total_metadata += metadata_len; | |
1153 | } | |
1154 | } while (ret == 0 || total_metadata == 0); | |
1155 | trace->metadata_fp = fopen(stream->path, "r"); | |
1156 | } | |
1157 | } | |
1158 | ||
1159 | if (!trace->metadata_fp) { | |
1160 | fprintf(stderr, "[error] No metadata stream opened\n"); | |
1161 | goto end_free; | |
1162 | } | |
1163 | ||
1164 | ret = bt_context_add_trace(bt_ctx, NULL, "ctf", | |
1165 | ctf_live_packet_seek, &mmap_list, trace->metadata_fp); | |
1166 | if (ret < 0) { | |
1167 | fprintf(stderr, "[error] Error adding trace\n"); | |
1168 | goto end_free; | |
1169 | } | |
d81179de JD |
1170 | |
1171 | if (bt_ctx->current_iterator) { | |
1172 | struct bt_trace_descriptor *td; | |
1173 | struct bt_trace_handle *handle; | |
1174 | ||
1175 | handle = (struct bt_trace_handle *) g_hash_table_lookup( | |
1176 | bt_ctx->trace_handles, | |
1177 | (gpointer) (unsigned long) ret); | |
1178 | td = handle->td; | |
1179 | bt_iter_add_trace(bt_ctx->current_iterator, td); | |
1180 | } | |
1181 | ||
12a91e9d | 1182 | trace->trace_id = ret; |
d81179de | 1183 | trace->in_use = 1; |
12a91e9d JD |
1184 | |
1185 | goto end; | |
1186 | ||
1187 | end_free: | |
1188 | bt_context_put(bt_ctx); | |
1189 | end: | |
1190 | return; | |
1191 | } | |
1192 | ||
d81179de | 1193 | int lttng_live_get_new_streams(struct lttng_live_ctx *ctx, uint64_t id) |
12a91e9d | 1194 | { |
d81179de JD |
1195 | struct lttng_viewer_cmd cmd; |
1196 | struct lttng_viewer_new_streams_request rq; | |
1197 | struct lttng_viewer_new_streams_response rp; | |
1198 | struct lttng_viewer_stream stream; | |
1199 | int ret, i; | |
1200 | ssize_t ret_len; | |
1201 | uint32_t stream_count; | |
12a91e9d | 1202 | |
d81179de JD |
1203 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_NEW_STREAMS); |
1204 | cmd.data_size = sizeof(rq); | |
1205 | cmd.cmd_version = 0; | |
1206 | ||
1207 | memset(&rq, 0, sizeof(rq)); | |
1208 | rq.session_id = htobe64(id); | |
1209 | ||
1210 | do { | |
1211 | ret_len = send(ctx->control_sock, &cmd, sizeof(cmd), 0); | |
1212 | } while (ret_len < 0 && errno == EINTR); | |
1213 | if (ret_len < 0) { | |
1214 | fprintf(stderr, "[error] Error sending cmd\n"); | |
1215 | ret = ret_len; | |
1216 | goto error; | |
1217 | } | |
1218 | assert(ret_len == sizeof(cmd)); | |
1219 | ||
1220 | do { | |
1221 | ret_len = send(ctx->control_sock, &rq, sizeof(rq), 0); | |
1222 | } while (ret_len < 0 && errno == EINTR); | |
1223 | if (ret_len < 0) { | |
1224 | fprintf(stderr, "[error] Error sending get_new_streams request\n"); | |
1225 | ret = ret_len; | |
1226 | goto error; | |
1227 | } | |
1228 | assert(ret_len == sizeof(rq)); | |
1229 | ||
1230 | do { | |
1231 | ret_len = recv(ctx->control_sock, &rp, sizeof(rp), 0); | |
1232 | } while (ret_len < 0 && errno == EINTR); | |
1233 | if (ret_len < 0) { | |
1234 | fprintf(stderr, "[error] Error receiving get_new_streams response\n"); | |
1235 | ret = ret_len; | |
1236 | goto error; | |
1237 | } | |
1238 | assert(ret_len == sizeof(rp)); | |
1239 | ||
1240 | switch(be32toh(rp.status)) { | |
1241 | case LTTNG_VIEWER_NEW_STREAMS_OK: | |
1242 | break; | |
1243 | case LTTNG_VIEWER_NEW_STREAMS_NO_NEW: | |
1244 | ret = 0; | |
1245 | goto end; | |
1246 | case LTTNG_VIEWER_NEW_STREAMS_HUP: | |
1247 | ret = -LTTNG_VIEWER_NEW_STREAMS_HUP; | |
1248 | goto end; | |
1249 | case LTTNG_VIEWER_NEW_STREAMS_ERR: | |
1250 | fprintf(stderr, "[error] get_new_streams error\n"); | |
1251 | ret = -1; | |
1252 | goto end; | |
1253 | default: | |
1254 | fprintf(stderr, "[error] Unknown return code %u\n", | |
1255 | be32toh(rp.status)); | |
1256 | ret = -1; | |
12a91e9d JD |
1257 | goto end; |
1258 | } | |
1259 | ||
d81179de JD |
1260 | stream_count = be32toh(rp.streams_count); |
1261 | ctx->session->stream_count += stream_count; | |
12a91e9d | 1262 | /* |
d81179de JD |
1263 | * When the session is created but not started, we do an active wait |
1264 | * until it starts. It allows the viewer to start processing the trace | |
1265 | * as soon as the session starts. | |
12a91e9d | 1266 | */ |
d81179de JD |
1267 | if (ctx->session->stream_count == 0) { |
1268 | ret = 0; | |
1269 | goto end; | |
1270 | } | |
1271 | printf_verbose("Waiting for %" PRIu64 " streams:\n", | |
1272 | ctx->session->stream_count); | |
1273 | ctx->session->streams = g_new0(struct lttng_live_viewer_stream, | |
1274 | ctx->session->stream_count); | |
1275 | for (i = 0; i < stream_count; i++) { | |
12a91e9d | 1276 | do { |
d81179de JD |
1277 | ret_len = recv(ctx->control_sock, &stream, sizeof(stream), 0); |
1278 | } while (ret_len < 0 && errno == EINTR); | |
1279 | if (ret_len < 0) { | |
1280 | fprintf(stderr, "[error] Error receiving stream\n"); | |
1281 | ret = ret_len; | |
1282 | goto error; | |
1283 | } | |
1284 | assert(ret_len == sizeof(stream)); | |
1285 | stream.path_name[LTTNG_VIEWER_PATH_MAX - 1] = '\0'; | |
1286 | stream.channel_name[LTTNG_VIEWER_NAME_MAX - 1] = '\0'; | |
1287 | ||
1288 | printf_verbose(" stream %" PRIu64 " : %s/%s\n", | |
1289 | be64toh(stream.id), stream.path_name, | |
1290 | stream.channel_name); | |
1291 | ctx->session->streams[i].id = be64toh(stream.id); | |
1292 | ctx->session->streams[i].session = ctx->session; | |
1293 | ||
1294 | ctx->session->streams[i].first_read = 1; | |
1295 | ctx->session->streams[i].mmap_size = 0; | |
1296 | ||
1297 | if (be32toh(stream.metadata_flag)) { | |
1298 | char *path; | |
1299 | ||
1300 | path = strdup(LTTNG_METADATA_PATH_TEMPLATE); | |
1301 | if (!path) { | |
1302 | perror("strdup"); | |
1303 | ret = -1; | |
1304 | goto error; | |
1305 | } | |
1306 | if (!mkdtemp(path)) { | |
1307 | perror("mkdtemp"); | |
1308 | free(path); | |
1309 | ret = -1; | |
1310 | goto error; | |
1311 | } | |
1312 | ctx->session->streams[i].metadata_flag = 1; | |
1313 | snprintf(ctx->session->streams[i].path, | |
1314 | sizeof(ctx->session->streams[i].path), | |
1315 | "%s/%s", path, | |
1316 | stream.channel_name); | |
1317 | ret = open(ctx->session->streams[i].path, | |
1318 | O_WRONLY | O_CREAT | O_TRUNC, | |
1319 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
12a91e9d | 1320 | if (ret < 0) { |
d81179de JD |
1321 | perror("open"); |
1322 | free(path); | |
1323 | goto error; | |
12a91e9d | 1324 | } |
d81179de JD |
1325 | ctx->session->streams[i].fd = ret; |
1326 | free(path); | |
1327 | } | |
1328 | ret = lttng_live_ctf_trace_assign(&ctx->session->streams[i], | |
1329 | be64toh(stream.ctf_trace_id)); | |
1330 | if (ret < 0) { | |
1331 | goto error; | |
1332 | } | |
1333 | ||
1334 | } | |
1335 | ret = 0; | |
1336 | ||
1337 | end: | |
1338 | error: | |
1339 | return ret; | |
1340 | } | |
12a91e9d | 1341 | |
d81179de JD |
1342 | void lttng_live_read(struct lttng_live_ctx *ctx) |
1343 | { | |
1344 | int ret, i; | |
1345 | #if 0 | |
1346 | struct bt_ctf_iter *iter; | |
1347 | const struct bt_ctf_event *event; | |
1348 | struct bt_iter_pos begin_pos; | |
1349 | struct bt_trace_descriptor *td_write; | |
1350 | struct bt_format *fmt_write; | |
1351 | struct ctf_text_stream_pos *sout; | |
1352 | #endif | |
1353 | uint64_t id; | |
12a91e9d | 1354 | |
d81179de JD |
1355 | ctx->bt_ctx = bt_context_create(); |
1356 | if (!ctx->bt_ctx) { | |
1357 | fprintf(stderr, "[error] bt_context_create allocation\n"); | |
1358 | goto end; | |
1359 | } | |
1360 | ||
1361 | #if 0 | |
1362 | fmt_write = bt_lookup_format(g_quark_from_static_string("text")); | |
1363 | if (!fmt_write) { | |
1364 | fprintf(stderr, "[error] ctf-text error\n"); | |
1365 | goto end; | |
1366 | } | |
1367 | ||
1368 | td_write = fmt_write->open_trace(NULL, O_RDWR, NULL, NULL); | |
1369 | if (!td_write) { | |
1370 | fprintf(stderr, "[error] Error opening output trace\n"); | |
1371 | goto end_free; | |
1372 | } | |
1373 | ||
1374 | sout = container_of(td_write, struct ctf_text_stream_pos, | |
1375 | trace_descriptor); | |
1376 | if (!sout->parent.event_cb) | |
1377 | goto end_free; | |
1378 | #endif | |
1379 | ||
1380 | ret = lttng_live_create_viewer_session(ctx); | |
1381 | if (ret < 0) { | |
1382 | goto end_free; | |
1383 | } | |
1384 | ||
1385 | for (i = 0; i < ctx->session_ids->len; i++) { | |
1386 | id = g_array_index(ctx->session_ids, uint64_t, i); | |
1387 | printf_verbose("Attaching to session %lu\n", id); | |
1388 | ret = lttng_live_attach_session(ctx, id); | |
1389 | printf_verbose("Attaching session returns %d\n", ret); | |
1390 | if (ret < 0) { | |
1391 | if (ret == -LTTNG_VIEWER_ATTACH_UNK) { | |
1392 | fprintf(stderr, "[error] Unknown session ID\n"); | |
1393 | } | |
1394 | goto end_free; | |
1395 | } | |
1396 | } | |
1397 | ||
1398 | /* | |
1399 | * As long as the session is active, we try to get new streams. | |
1400 | */ | |
1401 | #if 0 | |
1402 | for (;;) { | |
1403 | int flags; | |
1404 | #endif | |
1405 | ||
1406 | while (!ctx->session->stream_count) { | |
1407 | if (ctx->session_ids->len == 0) | |
1408 | goto end_free; | |
1409 | ret = ask_new_streams(ctx); | |
1410 | if (ret < 0) | |
1411 | goto end_free; | |
1412 | } | |
1413 | ||
1414 | g_hash_table_foreach(ctx->session->ctf_traces, add_traces, | |
1415 | ctx->bt_ctx); | |
1416 | ||
1417 | #if 0 | |
1418 | begin_pos.type = BT_SEEK_BEGIN; | |
1419 | iter = bt_ctf_iter_create(ctx->bt_ctx, &begin_pos, NULL); | |
1420 | if (!iter) { | |
1421 | fprintf(stderr, "[error] Iterator creation error\n"); | |
1422 | goto end; | |
1423 | } | |
1424 | ||
1425 | for (;;) { | |
1426 | event = bt_ctf_iter_read_event_flags(iter, &flags); | |
1427 | if (!(flags & BT_ITER_FLAG_RETRY)) { | |
1428 | if (!event) { | |
1429 | /* End of trace */ | |
1430 | break; | |
1431 | } | |
1432 | ret = sout->parent.event_cb(&sout->parent, | |
1433 | event->parent->stream); | |
1434 | if (ret) { | |
1435 | fprintf(stderr, "[error] Writing " | |
1436 | "event failed.\n"); | |
1437 | goto end_free; | |
1438 | } | |
1439 | } | |
1440 | ret = bt_iter_next(bt_ctf_get_iter(iter)); | |
1441 | if (ret < 0) { | |
1442 | goto end_free; | |
1443 | } | |
1444 | } | |
1445 | bt_ctf_iter_destroy(iter); | |
1446 | #endif | |
1447 | ret = check_requirements(ctx->bt_ctx); | |
8fe4d0cf | 1448 | if (ret < 0 && !valid_trace) { |
12a91e9d JD |
1449 | fprintf(stderr, "[error] some mandatory contexts " |
1450 | "were missing, exiting.\n"); | |
1451 | goto end; | |
1452 | } | |
1453 | ||
1454 | if (!opt_textdump) { | |
ec016cb4 | 1455 | #ifdef HAVE_LIBNCURSES |
12a91e9d JD |
1456 | pthread_create(&display_thread, NULL, ncurses_display, |
1457 | (void *) NULL); | |
1458 | pthread_create(&timer_thread, NULL, refresh_thread, | |
1459 | (void *) NULL); | |
ec016cb4 JD |
1460 | #else |
1461 | printf("Ncurses support not compiled, please install " | |
1462 | "the missing dependencies and recompile\n"); | |
1463 | goto end_free; | |
1464 | #endif | |
12a91e9d | 1465 | } |
d81179de JD |
1466 | iter_trace(ctx->bt_ctx); |
1467 | g_hash_table_foreach_remove(ctx->session->ctf_traces, | |
1468 | del_traces, ctx->bt_ctx); | |
1469 | ctx->session->stream_count = 0; | |
1470 | #if 0 | |
1471 | } | |
1472 | #endif | |
12a91e9d JD |
1473 | |
1474 | end_free: | |
d81179de | 1475 | bt_context_put(ctx->bt_ctx); |
12a91e9d JD |
1476 | end: |
1477 | return; | |
1478 | } |