Commit | Line | Data |
---|---|---|
4a744367 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 | #include <formats/ctf/events-private.h> | |
51 | ||
52 | #include "lttng-live-functions.h" | |
53 | #include "lttng-viewer.h" | |
54 | ||
55 | /* | |
56 | * Memory allocation zeroed | |
57 | */ | |
58 | #define zmalloc(x) calloc(1, x) | |
59 | ||
60 | #ifndef max_t | |
61 | #define max_t(type, a, b) \ | |
62 | ((type) (a) > (type) (b) ? (type) (a) : (type) (b)) | |
63 | #endif | |
64 | ||
65 | int lttng_live_connect_viewer(struct lttng_live_ctx *ctx, char *hostname, | |
66 | int port) | |
67 | { | |
68 | struct hostent *host; | |
69 | struct sockaddr_in server_addr; | |
70 | int ret; | |
71 | ||
72 | host = gethostbyname(hostname); | |
73 | if (!host) { | |
74 | ret = -1; | |
75 | goto end; | |
76 | } | |
77 | ||
78 | if ((ctx->control_sock = socket(AF_INET, SOCK_STREAM, 0)) == -1) { | |
79 | perror("Socket"); | |
80 | ret = -1; | |
81 | goto end; | |
82 | } | |
83 | ||
84 | server_addr.sin_family = AF_INET; | |
85 | server_addr.sin_port = htons(port); | |
86 | server_addr.sin_addr = *((struct in_addr *) host->h_addr); | |
87 | bzero(&(server_addr.sin_zero), 8); | |
88 | ||
89 | if (connect(ctx->control_sock, (struct sockaddr *) &server_addr, | |
90 | sizeof(struct sockaddr)) == -1) { | |
91 | perror("Connect"); | |
92 | ret = -1; | |
93 | goto end; | |
94 | } | |
95 | ||
96 | ret = 0; | |
97 | ||
98 | end: | |
99 | return ret; | |
100 | } | |
101 | ||
102 | int lttng_live_establish_connection(struct lttng_live_ctx *ctx) | |
103 | { | |
104 | struct lttng_viewer_cmd cmd; | |
105 | struct lttng_viewer_connect connect; | |
106 | int ret; | |
107 | ssize_t ret_len; | |
108 | ||
109 | cmd.cmd = htobe32(LTTNG_VIEWER_CONNECT); | |
110 | cmd.data_size = sizeof(connect); | |
111 | cmd.cmd_version = 0; | |
112 | ||
113 | connect.major = htobe32(LTTNG_LIVE_MAJOR); | |
114 | connect.minor = htobe32(LTTNG_LIVE_MINOR); | |
115 | connect.type = htobe32(LTTNG_VIEWER_CLIENT_COMMAND); | |
116 | ||
117 | do { | |
118 | ret_len = send(ctx->control_sock, &cmd, sizeof(cmd), 0); | |
119 | } while (ret_len < 0 && errno == EINTR); | |
120 | if (ret_len < 0) { | |
121 | fprintf(stderr, "[error] Error sending cmd\n"); | |
122 | ret = ret_len; | |
123 | goto error; | |
124 | } | |
125 | assert(ret_len == sizeof(cmd)); | |
126 | ||
127 | do { | |
128 | ret_len = send(ctx->control_sock, &connect, sizeof(connect), 0); | |
129 | } while (ret_len < 0 && errno == EINTR); | |
130 | if (ret_len < 0) { | |
131 | fprintf(stderr, "[error] Error sending version\n"); | |
132 | ret = ret_len; | |
133 | goto error; | |
134 | } | |
135 | assert(ret_len == sizeof(connect)); | |
136 | ||
137 | do { | |
138 | ret_len = recv(ctx->control_sock, &connect, sizeof(connect), 0); | |
139 | } while (ret_len < 0 && errno == EINTR); | |
140 | if (ret_len < 0) { | |
141 | fprintf(stderr, "[error] Error receiving version\n"); | |
142 | ret = ret_len; | |
143 | goto error; | |
144 | } | |
145 | assert(ret_len == sizeof(connect)); | |
146 | ||
147 | printf_verbose("Received viewer session ID : %" PRIu64 "\n", | |
148 | be64toh(connect.viewer_session_id)); | |
149 | printf_verbose("Relayd version : %u.%u\n", be32toh(connect.major), | |
150 | be32toh(connect.minor)); | |
151 | ||
152 | ret = 0; | |
153 | ||
154 | error: | |
155 | return ret; | |
156 | } | |
157 | ||
158 | int lttng_live_list_sessions(struct lttng_live_ctx *ctx, const char *path) | |
159 | { | |
160 | struct lttng_viewer_cmd cmd; | |
161 | struct lttng_viewer_list_sessions list; | |
162 | struct lttng_viewer_session lsession; | |
163 | int i, ret; | |
164 | ssize_t ret_len; | |
165 | int sessions_count; | |
166 | ||
167 | cmd.cmd = htobe32(LTTNG_VIEWER_LIST_SESSIONS); | |
168 | cmd.data_size = 0; | |
169 | cmd.cmd_version = 0; | |
170 | ||
171 | do { | |
172 | ret_len = send(ctx->control_sock, &cmd, sizeof(cmd), 0); | |
173 | } while (ret_len < 0 && errno == EINTR); | |
174 | if (ret_len < 0) { | |
175 | fprintf(stderr, "[error] Error sending cmd\n"); | |
176 | ret = ret_len; | |
177 | goto error; | |
178 | } | |
179 | assert(ret_len == sizeof(cmd)); | |
180 | ||
181 | do { | |
182 | ret_len = recv(ctx->control_sock, &list, sizeof(list), 0); | |
183 | } while (ret_len < 0 && errno == EINTR); | |
184 | if (ret_len < 0) { | |
185 | fprintf(stderr, "[error] Error receiving session list\n"); | |
186 | ret = ret_len; | |
187 | goto error; | |
188 | } | |
189 | assert(ret_len == sizeof(list)); | |
190 | ||
191 | sessions_count = be32toh(list.sessions_count); | |
192 | fprintf(stdout, "%u active session(s)%c\n", sessions_count, | |
193 | sessions_count > 0 ? ':' : ' '); | |
194 | for (i = 0; i < sessions_count; i++) { | |
195 | do { | |
196 | ret_len = recv(ctx->control_sock, &lsession, sizeof(lsession), 0); | |
197 | } while (ret_len < 0 && errno == EINTR); | |
198 | if (ret_len < 0) { | |
199 | fprintf(stderr, "[error] Error receiving session\n"); | |
200 | ret = ret_len; | |
201 | goto error; | |
202 | } | |
203 | assert(ret_len == sizeof(lsession)); | |
204 | ||
205 | fprintf(stdout, "%s/%" PRIu64 " : %s on host %s (timer = %u, " | |
206 | "%u stream(s), %u client(s) connected)\n", | |
207 | path, be64toh(lsession.id), | |
208 | lsession.session_name, lsession.hostname, | |
209 | be32toh(lsession.live_timer), | |
210 | be32toh(lsession.streams), | |
211 | be32toh(lsession.clients)); | |
212 | } | |
213 | ||
214 | ret = 0; | |
215 | ||
216 | error: | |
217 | return ret; | |
218 | } | |
219 | ||
220 | int lttng_live_ctf_trace_assign(struct lttng_live_viewer_stream *stream, | |
221 | uint64_t ctf_trace_id) | |
222 | { | |
223 | struct lttng_live_ctf_trace *trace; | |
224 | int ret = 0; | |
225 | ||
226 | trace = g_hash_table_lookup(stream->session->ctf_traces, | |
227 | (gpointer) ctf_trace_id); | |
228 | if (!trace) { | |
229 | trace = g_new0(struct lttng_live_ctf_trace, 1); | |
230 | if (!trace) { | |
231 | ret = -1; | |
232 | fprintf(stderr, "[error] ctf_trace allocation\n"); | |
233 | goto error; | |
234 | } | |
235 | trace->ctf_trace_id = ctf_trace_id; | |
236 | trace->streams = g_ptr_array_new(); | |
237 | g_hash_table_insert(stream->session->ctf_traces, | |
238 | (gpointer) ctf_trace_id, | |
239 | trace); | |
240 | } | |
241 | if (stream->metadata_flag) | |
242 | trace->metadata_stream = stream; | |
243 | ||
244 | stream->ctf_trace = trace; | |
245 | g_ptr_array_add(trace->streams, stream); | |
246 | ||
247 | error: | |
248 | return ret; | |
249 | } | |
250 | ||
251 | int lttng_live_attach_session(struct lttng_live_ctx *ctx, uint64_t id) | |
252 | { | |
253 | struct lttng_viewer_cmd cmd; | |
254 | struct lttng_viewer_attach_session_request rq; | |
255 | struct lttng_viewer_attach_session_response rp; | |
256 | struct lttng_viewer_stream stream; | |
257 | int ret, i; | |
258 | ssize_t ret_len; | |
259 | ||
260 | cmd.cmd = htobe32(LTTNG_VIEWER_ATTACH_SESSION); | |
261 | cmd.data_size = sizeof(rq); | |
262 | cmd.cmd_version = 0; | |
263 | ||
264 | memset(&rq, 0, sizeof(rq)); | |
265 | rq.session_id = htobe64(id); | |
266 | // TODO: add cmd line parameter to select seek beginning | |
267 | // rq.seek = htobe32(LTTNG_VIEWER_SEEK_BEGINNING); | |
268 | rq.seek = htobe32(LTTNG_VIEWER_SEEK_LAST); | |
269 | ||
270 | do { | |
271 | ret_len = send(ctx->control_sock, &cmd, sizeof(cmd), 0); | |
272 | } while (ret_len < 0 && errno == EINTR); | |
273 | if (ret_len < 0) { | |
274 | fprintf(stderr, "[error] Error sending cmd\n"); | |
275 | ret = ret_len; | |
276 | goto error; | |
277 | } | |
278 | assert(ret_len == sizeof(cmd)); | |
279 | ||
280 | do { | |
281 | ret_len = send(ctx->control_sock, &rq, sizeof(rq), 0); | |
282 | } while (ret_len < 0 && errno == EINTR); | |
283 | if (ret_len < 0) { | |
284 | fprintf(stderr, "[error] Error sending attach request\n"); | |
285 | ret = ret_len; | |
286 | goto error; | |
287 | } | |
288 | assert(ret_len == sizeof(rq)); | |
289 | ||
290 | do { | |
291 | ret_len = recv(ctx->control_sock, &rp, sizeof(rp), 0); | |
292 | } while (ret_len < 0 && errno == EINTR); | |
293 | if (ret_len < 0) { | |
294 | fprintf(stderr, "[error] Error receiving attach response\n"); | |
295 | ret = ret_len; | |
296 | goto error; | |
297 | } | |
298 | assert(ret_len == sizeof(rp)); | |
299 | ||
300 | switch(be32toh(rp.status)) { | |
301 | case LTTNG_VIEWER_ATTACH_OK: | |
302 | break; | |
303 | case LTTNG_VIEWER_ATTACH_UNK: | |
304 | ret = -LTTNG_VIEWER_ATTACH_UNK; | |
305 | goto end; | |
306 | case LTTNG_VIEWER_ATTACH_ALREADY: | |
307 | fprintf(stderr, "[error] Already a viewer attached\n"); | |
308 | ret = -1; | |
309 | goto end; | |
310 | case LTTNG_VIEWER_ATTACH_NOT_LIVE: | |
311 | fprintf(stderr, "[error] Not a live session\n"); | |
312 | ret = -1; | |
313 | goto end; | |
314 | case LTTNG_VIEWER_ATTACH_SEEK_ERR: | |
315 | fprintf(stderr, "[error] Wrong seek parameter\n"); | |
316 | ret = -1; | |
317 | goto end; | |
318 | default: | |
319 | fprintf(stderr, "[error] Unknown attach return code %u\n", | |
320 | be32toh(rp.status)); | |
321 | ret = -1; | |
322 | goto end; | |
323 | } | |
324 | if (be32toh(rp.status) != LTTNG_VIEWER_ATTACH_OK) { | |
325 | ret = -1; | |
326 | goto end; | |
327 | } | |
328 | ||
329 | ctx->session->stream_count = be32toh(rp.streams_count); | |
330 | /* | |
331 | * When the session is created but not started, we do an active wait | |
332 | * until it starts. It allows the viewer to start processing the trace | |
333 | * as soon as the session starts. | |
334 | */ | |
335 | if (ctx->session->stream_count == 0) { | |
336 | ret = 0; | |
337 | goto end; | |
338 | } | |
339 | printf_verbose("Waiting for %" PRIu64 " streams:\n", | |
340 | ctx->session->stream_count); | |
341 | ctx->session->streams = g_new0(struct lttng_live_viewer_stream, | |
342 | ctx->session->stream_count); | |
343 | if (!ctx->session->streams) { | |
344 | ret = -1; | |
345 | goto error; | |
346 | } | |
347 | ||
348 | for (i = 0; i < be32toh(rp.streams_count); i++) { | |
349 | do { | |
350 | ret_len = recv(ctx->control_sock, &stream, sizeof(stream), 0); | |
351 | } while (ret_len < 0 && errno == EINTR); | |
352 | if (ret_len < 0) { | |
353 | fprintf(stderr, "[error] Error receiving stream\n"); | |
354 | ret = ret_len; | |
355 | goto error; | |
356 | } | |
357 | assert(ret_len == sizeof(stream)); | |
358 | ||
359 | printf_verbose(" stream %" PRIu64 " : %s/%s\n", | |
360 | be64toh(stream.id), stream.path_name, | |
361 | stream.channel_name); | |
362 | ctx->session->streams[i].id = be64toh(stream.id); | |
363 | ctx->session->streams[i].session = ctx->session; | |
364 | ||
365 | ctx->session->streams[i].first_read = 1; | |
366 | ctx->session->streams[i].mmap_size = 0; | |
367 | ||
368 | if (be32toh(stream.metadata_flag)) { | |
369 | char *path; | |
370 | ||
371 | path = strdup(LTTNG_METADATA_PATH_TEMPLATE); | |
372 | path = mkdtemp(path); | |
373 | ctx->session->streams[i].metadata_flag = 1; | |
4a744367 JD |
374 | snprintf(ctx->session->streams[i].path, |
375 | sizeof(ctx->session->streams[i].path), | |
376 | "%s/%s", path, | |
377 | stream.channel_name); | |
378 | ret = open(ctx->session->streams[i].path, | |
379 | O_WRONLY | O_CREAT | O_TRUNC, | |
380 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
381 | if (ret < 0) { | |
ab9d07f0 | 382 | perror("open"); |
4a744367 JD |
383 | goto error; |
384 | } | |
385 | ctx->session->streams[i].fd = ret; | |
386 | } | |
387 | ret = lttng_live_ctf_trace_assign(&ctx->session->streams[i], | |
388 | be64toh(stream.ctf_trace_id)); | |
389 | if (ret < 0) { | |
390 | goto error; | |
391 | } | |
392 | ||
393 | } | |
394 | ret = 0; | |
395 | ||
396 | end: | |
397 | error: | |
398 | return ret; | |
399 | } | |
400 | ||
401 | static | |
402 | int get_data_packet(struct lttng_live_ctx *ctx, | |
403 | struct ctf_stream_pos *pos, | |
404 | struct lttng_live_viewer_stream *stream, uint64_t offset, | |
405 | uint64_t len) | |
406 | { | |
407 | struct lttng_viewer_cmd cmd; | |
408 | struct lttng_viewer_get_packet rq; | |
409 | struct lttng_viewer_trace_packet rp; | |
410 | ssize_t ret_len; | |
411 | int ret; | |
412 | ||
413 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_PACKET); | |
414 | cmd.data_size = sizeof(rq); | |
415 | cmd.cmd_version = 0; | |
416 | ||
417 | memset(&rq, 0, sizeof(rq)); | |
418 | rq.stream_id = htobe64(stream->id); | |
419 | /* Already in big endian. */ | |
420 | rq.offset = offset; | |
421 | rq.len = htobe32(len); | |
422 | ||
423 | do { | |
424 | ret_len = send(ctx->control_sock, &cmd, sizeof(cmd), 0); | |
425 | } while (ret_len < 0 && errno == EINTR); | |
426 | if (ret_len < 0) { | |
427 | fprintf(stderr, "[error] Error sending cmd\n"); | |
428 | ret = ret_len; | |
429 | goto error; | |
430 | } | |
431 | assert(ret_len == sizeof(cmd)); | |
432 | ||
433 | do { | |
434 | ret_len = send(ctx->control_sock, &rq, sizeof(rq), 0); | |
435 | } while (ret_len < 0 && errno == EINTR); | |
436 | if (ret_len < 0) { | |
437 | fprintf(stderr, "[error] Error sending get_data_packet request\n"); | |
438 | ret = ret_len; | |
439 | goto error; | |
440 | } | |
441 | assert(ret_len == sizeof(rq)); | |
442 | ||
443 | do { | |
444 | ret_len = recv(ctx->control_sock, &rp, sizeof(rp), 0); | |
445 | } while (ret_len < 0 && errno == EINTR); | |
446 | if (ret_len < 0) { | |
447 | fprintf(stderr, "[error] Error receiving data response\n"); | |
448 | ret = ret_len; | |
449 | goto error; | |
450 | } | |
451 | assert(ret_len == sizeof(rp)); | |
452 | ||
453 | rp.flags = be32toh(rp.flags); | |
454 | ||
455 | switch (be32toh(rp.status)) { | |
456 | case LTTNG_VIEWER_GET_PACKET_OK: | |
457 | len = be32toh(rp.len); | |
458 | printf_verbose("get_data_packet: Ok, packet size : %" PRIu64 | |
459 | "\n", len); | |
460 | break; | |
461 | case LTTNG_VIEWER_GET_PACKET_RETRY: | |
462 | printf_verbose("get_data_packet: retry\n"); | |
463 | ret = -1; | |
464 | goto end; | |
465 | case LTTNG_VIEWER_GET_PACKET_ERR: | |
466 | if (rp.flags & LTTNG_VIEWER_FLAG_NEW_METADATA) { | |
467 | printf_verbose("get_data_packet: new metadata needed\n"); | |
468 | ret = 0; | |
469 | goto end; | |
470 | } | |
471 | fprintf(stderr, "[error] get_data_packet: error\n"); | |
472 | ret = -1; | |
473 | goto end; | |
474 | case LTTNG_VIEWER_GET_PACKET_EOF: | |
475 | ret = -2; | |
476 | goto error; | |
477 | default: | |
478 | printf_verbose("get_data_packet: unknown\n"); | |
479 | assert(0); | |
480 | ret = -1; | |
481 | goto end; | |
482 | } | |
483 | ||
484 | if (len <= 0) { | |
485 | ret = -1; | |
486 | goto end; | |
487 | } | |
488 | ||
489 | if (len > stream->mmap_size) { | |
490 | uint64_t new_size; | |
491 | ||
492 | new_size = max_t(uint64_t, len, stream->mmap_size << 1); | |
493 | if (pos->base_mma) { | |
494 | /* unmap old base */ | |
495 | ret = munmap_align(pos->base_mma); | |
496 | if (ret) { | |
497 | fprintf(stderr, "[error] Unable to unmap old base: %s.\n", | |
498 | strerror(errno)); | |
499 | ret = -1; | |
500 | goto error; | |
501 | } | |
502 | pos->base_mma = NULL; | |
503 | } | |
504 | pos->base_mma = mmap_align(new_size, | |
505 | PROT_READ | PROT_WRITE, | |
506 | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); | |
507 | if (pos->base_mma == MAP_FAILED) { | |
508 | fprintf(stderr, "[error] mmap error %s.\n", | |
509 | strerror(errno)); | |
510 | pos->base_mma = NULL; | |
511 | ret = -1; | |
512 | goto error; | |
513 | } | |
514 | ||
515 | stream->mmap_size = new_size; | |
516 | printf_verbose("Expanding stream mmap size to %" PRIu64 " bytes\n", | |
517 | stream->mmap_size); | |
518 | } | |
519 | ||
520 | do { | |
521 | ret_len = recv(ctx->control_sock, | |
522 | mmap_align_addr(pos->base_mma), len, | |
523 | MSG_WAITALL); | |
524 | } while (ret_len < 0 && errno == EINTR); | |
525 | if (ret_len < 0) { | |
526 | fprintf(stderr, "[error] Error receiving trace packet\n"); | |
527 | ret = ret_len; | |
528 | goto error; | |
529 | } | |
530 | assert(ret_len == len); | |
531 | ||
532 | end: | |
533 | error: | |
534 | return ret; | |
535 | } | |
536 | ||
537 | /* | |
538 | * Return number of metadata bytes written or a negative value on error. | |
539 | */ | |
540 | static | |
541 | int get_new_metadata(struct lttng_live_ctx *ctx, | |
542 | struct lttng_live_viewer_stream *viewer_stream, | |
543 | uint64_t *metadata_len) | |
544 | { | |
545 | uint64_t len = 0; | |
546 | int ret; | |
547 | struct lttng_viewer_cmd cmd; | |
548 | struct lttng_viewer_get_metadata rq; | |
549 | struct lttng_viewer_metadata_packet rp; | |
550 | struct lttng_live_viewer_stream *metadata_stream; | |
551 | char *data = NULL; | |
552 | ssize_t ret_len; | |
553 | ||
554 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_METADATA); | |
555 | cmd.data_size = sizeof(rq); | |
556 | cmd.cmd_version = 0; | |
557 | ||
558 | metadata_stream = viewer_stream->ctf_trace->metadata_stream; | |
559 | rq.stream_id = htobe64(metadata_stream->id); | |
560 | ||
561 | do { | |
562 | ret_len = send(ctx->control_sock, &cmd, sizeof(cmd), 0); | |
563 | } while (ret_len < 0 && errno == EINTR); | |
564 | if (ret_len < 0) { | |
565 | fprintf(stderr, "[error] Error sending cmd\n"); | |
566 | ret = ret_len; | |
567 | goto error; | |
568 | } | |
569 | assert(ret_len == sizeof(cmd)); | |
570 | ||
571 | do { | |
572 | ret_len = send(ctx->control_sock, &rq, sizeof(rq), 0); | |
573 | } while (ret_len < 0 && errno == EINTR); | |
574 | if (ret_len < 0) { | |
575 | fprintf(stderr, "[error] Error sending get_metadata request\n"); | |
576 | ret = ret_len; | |
577 | goto error; | |
578 | } | |
579 | assert(ret_len == sizeof(rq)); | |
580 | ||
581 | do { | |
582 | ret_len = recv(ctx->control_sock, &rp, sizeof(rp), 0); | |
583 | } while (ret_len < 0 && errno == EINTR); | |
584 | if (ret_len < 0) { | |
585 | fprintf(stderr, "[error] Error receiving metadata response\n"); | |
586 | ret = ret_len; | |
587 | goto error; | |
588 | } | |
589 | assert(ret_len == sizeof(rp)); | |
590 | ||
591 | switch (be32toh(rp.status)) { | |
592 | case LTTNG_VIEWER_METADATA_OK: | |
593 | printf_verbose("get_metadata : OK\n"); | |
594 | break; | |
595 | case LTTNG_VIEWER_NO_NEW_METADATA: | |
596 | printf_verbose("get_metadata : NO NEW\n"); | |
597 | ret = -1; | |
598 | goto end; | |
599 | case LTTNG_VIEWER_METADATA_ERR: | |
600 | printf_verbose("get_metadata : ERR\n"); | |
601 | ret = -1; | |
602 | goto end; | |
603 | default: | |
604 | printf_verbose("get_metadata : UNKNOWN\n"); | |
605 | ret = -1; | |
606 | goto end; | |
607 | } | |
608 | ||
609 | len = be64toh(rp.len); | |
610 | printf_verbose("Writing %" PRIu64" bytes to metadata\n", len); | |
611 | if (len <= 0) { | |
612 | ret = -1; | |
613 | goto end; | |
614 | } | |
615 | ||
616 | data = zmalloc(len); | |
617 | if (!data) { | |
618 | perror("relay data zmalloc"); | |
619 | ret = -1; | |
620 | goto error; | |
621 | } | |
622 | do { | |
623 | ret_len = recv(ctx->control_sock, data, len, MSG_WAITALL); | |
624 | } while (ret_len < 0 && errno == EINTR); | |
625 | if (ret_len < 0) { | |
626 | fprintf(stderr, "[error] Error receiving trace packet\n"); | |
627 | ret = ret_len; | |
628 | free(data); | |
629 | goto error; | |
630 | } | |
631 | assert(ret_len == len); | |
632 | ||
633 | do { | |
634 | ret_len = write(metadata_stream->fd, data, len); | |
635 | } while (ret_len < 0 && errno == EINTR); | |
636 | if (ret_len < 0) { | |
637 | free(data); | |
638 | ret = ret_len; | |
639 | goto error; | |
640 | } | |
641 | assert(ret_len == len); | |
642 | ||
643 | free(data); | |
644 | ||
645 | *metadata_len = len; | |
646 | ret = 0; | |
647 | end: | |
648 | error: | |
649 | return ret; | |
650 | } | |
651 | ||
652 | /* | |
653 | * Get one index for a stream. | |
654 | * | |
655 | * Returns 0 on success or a negative value on error. | |
656 | */ | |
657 | static | |
658 | int get_next_index(struct lttng_live_ctx *ctx, | |
659 | struct lttng_live_viewer_stream *viewer_stream, | |
660 | struct packet_index *index) | |
661 | { | |
662 | struct lttng_viewer_cmd cmd; | |
663 | struct lttng_viewer_get_next_index rq; | |
664 | struct lttng_viewer_index rp; | |
665 | int ret; | |
666 | uint64_t metadata_len; | |
667 | ssize_t ret_len; | |
668 | ||
669 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_NEXT_INDEX); | |
670 | cmd.data_size = sizeof(rq); | |
671 | cmd.cmd_version = 0; | |
672 | ||
673 | memset(&rq, 0, sizeof(rq)); | |
674 | rq.stream_id = htobe64(viewer_stream->id); | |
675 | ||
676 | retry: | |
677 | do { | |
678 | ret_len = send(ctx->control_sock, &cmd, sizeof(cmd), 0); | |
679 | } while (ret_len < 0 && errno == EINTR); | |
680 | if (ret_len < 0) { | |
681 | fprintf(stderr, "[error] Error sending cmd\n"); | |
682 | ret = ret_len; | |
683 | goto error; | |
684 | } | |
685 | assert(ret_len == sizeof(cmd)); | |
686 | ||
687 | do { | |
688 | ret_len = send(ctx->control_sock, &rq, sizeof(rq), 0); | |
689 | } while (ret_len < 0 && errno == EINTR); | |
690 | if (ret_len < 0) { | |
691 | fprintf(stderr, "[error] Error sending get_next_index request\n"); | |
692 | ret = ret_len; | |
693 | goto error; | |
694 | } | |
695 | assert(ret_len == sizeof(rq)); | |
696 | ||
697 | do { | |
698 | ret_len = recv(ctx->control_sock, &rp, sizeof(rp), 0); | |
699 | } while (ret_len < 0 && errno == EINTR); | |
700 | if (ret_len < 0) { | |
701 | fprintf(stderr, "[error] Error receiving index response\n"); | |
702 | ret = ret_len; | |
703 | goto error; | |
704 | } | |
705 | assert(ret_len == sizeof(rp)); | |
706 | ||
707 | rp.flags = be32toh(rp.flags); | |
708 | ||
709 | switch (be32toh(rp.status)) { | |
710 | case LTTNG_VIEWER_INDEX_INACTIVE: | |
711 | printf_verbose("get_next_index: inactive\n"); | |
712 | memset(index, 0, sizeof(struct packet_index)); | |
713 | index->timestamp_end = be64toh(rp.timestamp_end); | |
714 | break; | |
715 | case LTTNG_VIEWER_INDEX_OK: | |
716 | printf_verbose("get_next_index: Ok, need metadata update : %u\n", | |
717 | rp.flags & LTTNG_VIEWER_FLAG_NEW_METADATA); | |
718 | index->offset = be64toh(rp.offset); | |
719 | index->packet_size = be64toh(rp.packet_size); | |
720 | index->content_size = be64toh(rp.content_size); | |
721 | index->timestamp_begin = be64toh(rp.timestamp_begin); | |
722 | index->timestamp_end = be64toh(rp.timestamp_end); | |
723 | index->events_discarded = be64toh(rp.events_discarded); | |
724 | ||
725 | if (rp.flags & LTTNG_VIEWER_FLAG_NEW_METADATA) { | |
726 | printf_verbose("get_next_index: new metadata needed\n"); | |
727 | ret = get_new_metadata(ctx, viewer_stream, | |
728 | &metadata_len); | |
729 | if (ret < 0) { | |
730 | goto error; | |
731 | } | |
732 | } | |
733 | break; | |
734 | case LTTNG_VIEWER_INDEX_RETRY: | |
735 | printf_verbose("get_next_index: retry\n"); | |
736 | sleep(1); | |
737 | goto retry; | |
738 | case LTTNG_VIEWER_INDEX_HUP: | |
739 | printf_verbose("get_next_index: stream hung up\n"); | |
740 | viewer_stream->id = -1ULL; | |
741 | viewer_stream->fd = -1; | |
742 | index->offset = EOF; | |
743 | break; | |
744 | case LTTNG_VIEWER_INDEX_ERR: | |
745 | fprintf(stderr, "[error] get_next_index: error\n"); | |
746 | ret = -1; | |
747 | goto error; | |
748 | default: | |
749 | fprintf(stderr, "[error] get_next_index: unkwown value\n"); | |
750 | ret = -1; | |
751 | goto error; | |
752 | } | |
753 | ||
754 | ret = 0; | |
755 | ||
756 | error: | |
757 | return ret; | |
758 | } | |
759 | ||
760 | void ctf_live_packet_seek(struct bt_stream_pos *stream_pos, size_t index, | |
761 | int whence) | |
762 | { | |
763 | struct ctf_stream_pos *pos; | |
764 | struct ctf_file_stream *file_stream; | |
765 | struct packet_index packet_index; | |
766 | struct lttng_live_viewer_stream *viewer_stream; | |
767 | struct lttng_live_session *session; | |
768 | int ret; | |
769 | ||
770 | retry: | |
771 | pos = ctf_pos(stream_pos); | |
772 | file_stream = container_of(pos, struct ctf_file_stream, pos); | |
773 | viewer_stream = (struct lttng_live_viewer_stream *) pos->priv; | |
774 | session = viewer_stream->session; | |
775 | ||
776 | printf_verbose("get_next_index for stream %" PRIu64 "\n", viewer_stream->id); | |
777 | ret = get_next_index(session->ctx, viewer_stream, &packet_index); | |
778 | if (ret < 0) { | |
779 | pos->offset = EOF; | |
780 | fprintf(stderr, "[error] get_next_index failed\n"); | |
781 | return; | |
782 | } | |
783 | ||
784 | pos->packet_size = packet_index.packet_size; | |
785 | pos->content_size = packet_index.content_size; | |
786 | pos->mmap_base_offset = 0; | |
787 | if (packet_index.offset == EOF) { | |
788 | pos->offset = EOF; | |
789 | } else { | |
790 | pos->offset = 0; | |
791 | } | |
792 | ||
793 | if (packet_index.content_size == 0) { | |
794 | file_stream->parent.cycles_timestamp = packet_index.timestamp_end; | |
795 | file_stream->parent.real_timestamp = ctf_get_real_timestamp( | |
796 | &file_stream->parent, packet_index.timestamp_end); | |
797 | } else { | |
798 | file_stream->parent.cycles_timestamp = packet_index.timestamp_begin; | |
799 | file_stream->parent.real_timestamp = ctf_get_real_timestamp( | |
800 | &file_stream->parent, packet_index.timestamp_begin); | |
801 | } | |
802 | ||
803 | if (pos->packet_size == 0 || pos->offset == EOF) { | |
804 | goto end; | |
805 | } | |
806 | ||
807 | printf_verbose("get_data_packet for stream %" PRIu64 "\n", | |
808 | viewer_stream->id); | |
809 | ret = get_data_packet(session->ctx, pos, viewer_stream, | |
810 | be64toh(packet_index.offset), | |
811 | packet_index.packet_size / CHAR_BIT); | |
812 | if (ret == -2) { | |
813 | goto retry; | |
814 | } else if (ret < 0) { | |
815 | pos->offset = EOF; | |
816 | fprintf(stderr, "[error] get_data_packet failed\n"); | |
817 | return; | |
818 | } | |
819 | ||
820 | printf_verbose("Index received : packet_size : %" PRIu64 | |
821 | ", offset %" PRIu64 ", content_size %" PRIu64 | |
822 | ", timestamp_end : %" PRIu64 "\n", | |
823 | packet_index.packet_size, packet_index.offset, | |
824 | packet_index.content_size, packet_index.timestamp_end); | |
825 | ||
826 | /* update trace_packet_header and stream_packet_context */ | |
827 | if (pos->prot != PROT_WRITE && file_stream->parent.trace_packet_header) { | |
828 | /* Read packet header */ | |
829 | ret = generic_rw(&pos->parent, &file_stream->parent.trace_packet_header->p); | |
830 | if (ret) { | |
831 | pos->offset = EOF; | |
832 | fprintf(stderr, "[error] trace packet header read failed\n"); | |
833 | goto end; | |
834 | } | |
835 | } | |
836 | if (pos->prot != PROT_WRITE && file_stream->parent.stream_packet_context) { | |
837 | /* Read packet context */ | |
838 | ret = generic_rw(&pos->parent, &file_stream->parent.stream_packet_context->p); | |
839 | if (ret) { | |
840 | pos->offset = EOF; | |
841 | fprintf(stderr, "[error] stream packet context read failed\n"); | |
842 | goto end; | |
843 | } | |
844 | } | |
845 | pos->data_offset = pos->offset; | |
846 | ||
847 | end: | |
848 | return; | |
849 | } | |
850 | ||
851 | static int del_traces(gpointer key, gpointer value, gpointer user_data) | |
852 | { | |
853 | struct bt_context *bt_ctx = user_data; | |
854 | struct lttng_live_ctf_trace *trace = value; | |
855 | int ret; | |
856 | ||
857 | ret = bt_context_remove_trace(bt_ctx, trace->trace_id); | |
858 | if (ret < 0) | |
859 | fprintf(stderr, "[error] removing trace from context\n"); | |
860 | ||
861 | /* remove the key/value pair from the HT. */ | |
862 | return 1; | |
863 | } | |
864 | ||
865 | static void add_traces(gpointer key, gpointer value, gpointer user_data) | |
866 | { | |
867 | int i, ret, total_metadata = 0; | |
868 | uint64_t metadata_len; | |
869 | struct bt_context *bt_ctx = user_data; | |
870 | struct lttng_live_ctf_trace *trace = value; | |
871 | struct lttng_live_viewer_stream *stream; | |
872 | struct bt_mmap_stream *new_mmap_stream; | |
873 | struct bt_mmap_stream_list mmap_list; | |
874 | struct lttng_live_ctx *ctx = NULL; | |
875 | ||
876 | BT_INIT_LIST_HEAD(&mmap_list.head); | |
877 | ||
878 | for (i = 0; i < trace->streams->len; i++) { | |
879 | stream = g_ptr_array_index(trace->streams, i); | |
880 | ctx = stream->session->ctx; | |
881 | ||
882 | if (!stream->metadata_flag) { | |
883 | new_mmap_stream = zmalloc(sizeof(struct bt_mmap_stream)); | |
884 | new_mmap_stream->priv = (void *) stream; | |
885 | new_mmap_stream->fd = -1; | |
886 | bt_list_add(&new_mmap_stream->list, &mmap_list.head); | |
887 | } else { | |
888 | /* Get all possible metadata before starting */ | |
889 | do { | |
890 | ret = get_new_metadata(ctx, stream, | |
891 | &metadata_len); | |
892 | if (ret == 0) { | |
893 | total_metadata += metadata_len; | |
894 | } | |
895 | } while (ret == 0 || total_metadata == 0); | |
896 | trace->metadata_fp = fopen(stream->path, "r"); | |
897 | } | |
898 | } | |
899 | ||
900 | if (!trace->metadata_fp) { | |
901 | fprintf(stderr, "[error] No metadata stream opened\n"); | |
902 | goto end_free; | |
903 | } | |
904 | ||
905 | ret = bt_context_add_trace(bt_ctx, NULL, "ctf", | |
906 | ctf_live_packet_seek, &mmap_list, trace->metadata_fp); | |
907 | if (ret < 0) { | |
908 | fprintf(stderr, "[error] Error adding trace\n"); | |
909 | goto end_free; | |
910 | } | |
911 | trace->trace_id = ret; | |
912 | ||
913 | goto end; | |
914 | ||
915 | end_free: | |
916 | bt_context_put(bt_ctx); | |
917 | end: | |
918 | return; | |
919 | } | |
920 | ||
921 | void lttng_live_read(struct lttng_live_ctx *ctx, uint64_t session_id) | |
922 | { | |
923 | int ret, active_session = 0; | |
924 | struct bt_context *bt_ctx; | |
925 | struct bt_ctf_iter *iter; | |
926 | const struct bt_ctf_event *event; | |
927 | struct bt_iter_pos begin_pos; | |
928 | struct bt_trace_descriptor *td_write; | |
929 | struct bt_format *fmt_write; | |
930 | struct ctf_text_stream_pos *sout; | |
931 | ||
932 | bt_ctx = bt_context_create(); | |
933 | if (!bt_ctx) { | |
934 | fprintf(stderr, "[error] bt_context_create allocation\n"); | |
935 | goto end; | |
936 | } | |
937 | ||
938 | fmt_write = bt_lookup_format(g_quark_from_static_string("text")); | |
939 | if (!fmt_write) { | |
940 | fprintf(stderr, "[error] ctf-text error\n"); | |
941 | goto end; | |
942 | } | |
943 | ||
944 | td_write = fmt_write->open_trace(NULL, O_RDWR, NULL, NULL); | |
945 | if (!td_write) { | |
946 | fprintf(stderr, "[error] Error opening output trace\n"); | |
947 | goto end_free; | |
948 | } | |
949 | ||
950 | sout = container_of(td_write, struct ctf_text_stream_pos, | |
951 | trace_descriptor); | |
952 | if (!sout->parent.event_cb) | |
953 | goto end_free; | |
954 | ||
955 | /* | |
956 | * As long as the session is active, we try to reattach to it, | |
957 | * even if all the streams get closed. | |
958 | */ | |
959 | do { | |
960 | int flags; | |
961 | ||
962 | do { | |
963 | ret = lttng_live_attach_session(ctx, session_id); | |
964 | printf_verbose("Attaching session returns %d\n", ret); | |
965 | if (ret < 0) { | |
966 | if (ret == -LTTNG_VIEWER_ATTACH_UNK) { | |
967 | if (active_session) | |
968 | goto end_free; | |
969 | fprintf(stderr, "[error] Unknown " | |
970 | "session ID\n"); | |
971 | } | |
972 | goto end_free; | |
973 | } else { | |
974 | active_session = 1; | |
975 | } | |
976 | } while (ctx->session->stream_count == 0); | |
977 | ||
978 | g_hash_table_foreach(ctx->session->ctf_traces, add_traces, bt_ctx); | |
979 | ||
980 | begin_pos.type = BT_SEEK_BEGIN; | |
981 | iter = bt_ctf_iter_create(bt_ctx, &begin_pos, NULL); | |
982 | if (!iter) { | |
983 | fprintf(stderr, "[error] Iterator creation error\n"); | |
984 | goto end; | |
985 | } | |
986 | for (;;) { | |
987 | event = bt_ctf_iter_read_event_flags(iter, &flags); | |
988 | if (!(flags & BT_ITER_FLAG_RETRY)) { | |
989 | if (!event) { | |
990 | /* End of trace */ | |
991 | break; | |
992 | } | |
993 | ret = sout->parent.event_cb(&sout->parent, | |
994 | event->parent->stream); | |
995 | if (ret) { | |
996 | fprintf(stderr, "[error] Writing " | |
997 | "event failed.\n"); | |
998 | goto end_free; | |
999 | } | |
1000 | } | |
1001 | ret = bt_iter_next(bt_ctf_get_iter(iter)); | |
1002 | if (ret < 0) { | |
1003 | goto end_free; | |
1004 | } | |
1005 | } | |
1006 | bt_ctf_iter_destroy(iter); | |
1007 | g_hash_table_foreach_remove(ctx->session->ctf_traces, del_traces, bt_ctx); | |
1008 | } while (active_session); | |
1009 | ||
1010 | end_free: | |
1011 | bt_context_put(bt_ctx); | |
1012 | end: | |
1013 | return; | |
1014 | } |