Commit | Line | Data |
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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 | ||
0c3cd7e1 | 113 | connect.viewer_session_id = -1ULL; /* will be set on recv */ |
4a744367 JD |
114 | connect.major = htobe32(LTTNG_LIVE_MAJOR); |
115 | connect.minor = htobe32(LTTNG_LIVE_MINOR); | |
116 | connect.type = htobe32(LTTNG_VIEWER_CLIENT_COMMAND); | |
117 | ||
118 | do { | |
119 | ret_len = send(ctx->control_sock, &cmd, sizeof(cmd), 0); | |
120 | } while (ret_len < 0 && errno == EINTR); | |
121 | if (ret_len < 0) { | |
122 | fprintf(stderr, "[error] Error sending cmd\n"); | |
123 | ret = ret_len; | |
124 | goto error; | |
125 | } | |
126 | assert(ret_len == sizeof(cmd)); | |
127 | ||
128 | do { | |
129 | ret_len = send(ctx->control_sock, &connect, sizeof(connect), 0); | |
130 | } while (ret_len < 0 && errno == EINTR); | |
131 | if (ret_len < 0) { | |
132 | fprintf(stderr, "[error] Error sending version\n"); | |
133 | ret = ret_len; | |
134 | goto error; | |
135 | } | |
136 | assert(ret_len == sizeof(connect)); | |
137 | ||
138 | do { | |
139 | ret_len = recv(ctx->control_sock, &connect, sizeof(connect), 0); | |
140 | } while (ret_len < 0 && errno == EINTR); | |
141 | if (ret_len < 0) { | |
142 | fprintf(stderr, "[error] Error receiving version\n"); | |
143 | ret = ret_len; | |
144 | goto error; | |
145 | } | |
146 | assert(ret_len == sizeof(connect)); | |
147 | ||
148 | printf_verbose("Received viewer session ID : %" PRIu64 "\n", | |
149 | be64toh(connect.viewer_session_id)); | |
150 | printf_verbose("Relayd version : %u.%u\n", be32toh(connect.major), | |
151 | be32toh(connect.minor)); | |
152 | ||
153 | ret = 0; | |
154 | ||
155 | error: | |
156 | return ret; | |
157 | } | |
158 | ||
159 | int lttng_live_list_sessions(struct lttng_live_ctx *ctx, const char *path) | |
160 | { | |
161 | struct lttng_viewer_cmd cmd; | |
162 | struct lttng_viewer_list_sessions list; | |
163 | struct lttng_viewer_session lsession; | |
164 | int i, ret; | |
165 | ssize_t ret_len; | |
166 | int sessions_count; | |
167 | ||
168 | cmd.cmd = htobe32(LTTNG_VIEWER_LIST_SESSIONS); | |
169 | cmd.data_size = 0; | |
170 | cmd.cmd_version = 0; | |
171 | ||
172 | do { | |
173 | ret_len = send(ctx->control_sock, &cmd, sizeof(cmd), 0); | |
174 | } while (ret_len < 0 && errno == EINTR); | |
175 | if (ret_len < 0) { | |
176 | fprintf(stderr, "[error] Error sending cmd\n"); | |
177 | ret = ret_len; | |
178 | goto error; | |
179 | } | |
180 | assert(ret_len == sizeof(cmd)); | |
181 | ||
182 | do { | |
183 | ret_len = recv(ctx->control_sock, &list, sizeof(list), 0); | |
184 | } while (ret_len < 0 && errno == EINTR); | |
185 | if (ret_len < 0) { | |
186 | fprintf(stderr, "[error] Error receiving session list\n"); | |
187 | ret = ret_len; | |
188 | goto error; | |
189 | } | |
190 | assert(ret_len == sizeof(list)); | |
191 | ||
192 | sessions_count = be32toh(list.sessions_count); | |
193 | fprintf(stdout, "%u active session(s)%c\n", sessions_count, | |
194 | sessions_count > 0 ? ':' : ' '); | |
195 | for (i = 0; i < sessions_count; i++) { | |
196 | do { | |
197 | ret_len = recv(ctx->control_sock, &lsession, sizeof(lsession), 0); | |
198 | } while (ret_len < 0 && errno == EINTR); | |
199 | if (ret_len < 0) { | |
200 | fprintf(stderr, "[error] Error receiving session\n"); | |
201 | ret = ret_len; | |
202 | goto error; | |
203 | } | |
204 | assert(ret_len == sizeof(lsession)); | |
9ed31e53 MD |
205 | lsession.hostname[LTTNG_VIEWER_HOST_NAME_MAX - 1] = '\0'; |
206 | lsession.session_name[LTTNG_VIEWER_NAME_MAX - 1] = '\0'; | |
4a744367 JD |
207 | |
208 | fprintf(stdout, "%s/%" PRIu64 " : %s on host %s (timer = %u, " | |
209 | "%u stream(s), %u client(s) connected)\n", | |
210 | path, be64toh(lsession.id), | |
211 | lsession.session_name, lsession.hostname, | |
212 | be32toh(lsession.live_timer), | |
213 | be32toh(lsession.streams), | |
214 | be32toh(lsession.clients)); | |
215 | } | |
216 | ||
217 | ret = 0; | |
218 | ||
219 | error: | |
220 | return ret; | |
221 | } | |
222 | ||
223 | int lttng_live_ctf_trace_assign(struct lttng_live_viewer_stream *stream, | |
224 | uint64_t ctf_trace_id) | |
225 | { | |
226 | struct lttng_live_ctf_trace *trace; | |
227 | int ret = 0; | |
228 | ||
229 | trace = g_hash_table_lookup(stream->session->ctf_traces, | |
230 | (gpointer) ctf_trace_id); | |
231 | if (!trace) { | |
232 | trace = g_new0(struct lttng_live_ctf_trace, 1); | |
4a744367 JD |
233 | trace->ctf_trace_id = ctf_trace_id; |
234 | trace->streams = g_ptr_array_new(); | |
235 | g_hash_table_insert(stream->session->ctf_traces, | |
236 | (gpointer) ctf_trace_id, | |
237 | trace); | |
238 | } | |
239 | if (stream->metadata_flag) | |
240 | trace->metadata_stream = stream; | |
241 | ||
242 | stream->ctf_trace = trace; | |
243 | g_ptr_array_add(trace->streams, stream); | |
244 | ||
4a744367 JD |
245 | return ret; |
246 | } | |
247 | ||
248 | int lttng_live_attach_session(struct lttng_live_ctx *ctx, uint64_t id) | |
249 | { | |
250 | struct lttng_viewer_cmd cmd; | |
251 | struct lttng_viewer_attach_session_request rq; | |
252 | struct lttng_viewer_attach_session_response rp; | |
253 | struct lttng_viewer_stream stream; | |
254 | int ret, i; | |
255 | ssize_t ret_len; | |
256 | ||
257 | cmd.cmd = htobe32(LTTNG_VIEWER_ATTACH_SESSION); | |
258 | cmd.data_size = sizeof(rq); | |
259 | cmd.cmd_version = 0; | |
260 | ||
261 | memset(&rq, 0, sizeof(rq)); | |
262 | rq.session_id = htobe64(id); | |
263 | // TODO: add cmd line parameter to select seek beginning | |
264 | // rq.seek = htobe32(LTTNG_VIEWER_SEEK_BEGINNING); | |
265 | rq.seek = htobe32(LTTNG_VIEWER_SEEK_LAST); | |
266 | ||
267 | do { | |
268 | ret_len = send(ctx->control_sock, &cmd, sizeof(cmd), 0); | |
269 | } while (ret_len < 0 && errno == EINTR); | |
270 | if (ret_len < 0) { | |
271 | fprintf(stderr, "[error] Error sending cmd\n"); | |
272 | ret = ret_len; | |
273 | goto error; | |
274 | } | |
275 | assert(ret_len == sizeof(cmd)); | |
276 | ||
277 | do { | |
278 | ret_len = send(ctx->control_sock, &rq, sizeof(rq), 0); | |
279 | } while (ret_len < 0 && errno == EINTR); | |
280 | if (ret_len < 0) { | |
281 | fprintf(stderr, "[error] Error sending attach request\n"); | |
282 | ret = ret_len; | |
283 | goto error; | |
284 | } | |
285 | assert(ret_len == sizeof(rq)); | |
286 | ||
287 | do { | |
288 | ret_len = recv(ctx->control_sock, &rp, sizeof(rp), 0); | |
289 | } while (ret_len < 0 && errno == EINTR); | |
290 | if (ret_len < 0) { | |
291 | fprintf(stderr, "[error] Error receiving attach response\n"); | |
292 | ret = ret_len; | |
293 | goto error; | |
294 | } | |
295 | assert(ret_len == sizeof(rp)); | |
296 | ||
297 | switch(be32toh(rp.status)) { | |
298 | case LTTNG_VIEWER_ATTACH_OK: | |
299 | break; | |
300 | case LTTNG_VIEWER_ATTACH_UNK: | |
301 | ret = -LTTNG_VIEWER_ATTACH_UNK; | |
302 | goto end; | |
303 | case LTTNG_VIEWER_ATTACH_ALREADY: | |
304 | fprintf(stderr, "[error] Already a viewer attached\n"); | |
305 | ret = -1; | |
306 | goto end; | |
307 | case LTTNG_VIEWER_ATTACH_NOT_LIVE: | |
308 | fprintf(stderr, "[error] Not a live session\n"); | |
309 | ret = -1; | |
310 | goto end; | |
311 | case LTTNG_VIEWER_ATTACH_SEEK_ERR: | |
312 | fprintf(stderr, "[error] Wrong seek parameter\n"); | |
313 | ret = -1; | |
314 | goto end; | |
315 | default: | |
316 | fprintf(stderr, "[error] Unknown attach return code %u\n", | |
317 | be32toh(rp.status)); | |
318 | ret = -1; | |
319 | goto end; | |
320 | } | |
321 | if (be32toh(rp.status) != LTTNG_VIEWER_ATTACH_OK) { | |
322 | ret = -1; | |
323 | goto end; | |
324 | } | |
325 | ||
326 | ctx->session->stream_count = be32toh(rp.streams_count); | |
327 | /* | |
328 | * When the session is created but not started, we do an active wait | |
329 | * until it starts. It allows the viewer to start processing the trace | |
330 | * as soon as the session starts. | |
331 | */ | |
332 | if (ctx->session->stream_count == 0) { | |
333 | ret = 0; | |
334 | goto end; | |
335 | } | |
336 | printf_verbose("Waiting for %" PRIu64 " streams:\n", | |
337 | ctx->session->stream_count); | |
338 | ctx->session->streams = g_new0(struct lttng_live_viewer_stream, | |
339 | ctx->session->stream_count); | |
4a744367 JD |
340 | for (i = 0; i < be32toh(rp.streams_count); i++) { |
341 | do { | |
342 | ret_len = recv(ctx->control_sock, &stream, sizeof(stream), 0); | |
343 | } while (ret_len < 0 && errno == EINTR); | |
344 | if (ret_len < 0) { | |
345 | fprintf(stderr, "[error] Error receiving stream\n"); | |
346 | ret = ret_len; | |
347 | goto error; | |
348 | } | |
349 | assert(ret_len == sizeof(stream)); | |
9ed31e53 MD |
350 | stream.path_name[LTTNG_VIEWER_PATH_MAX - 1] = '\0'; |
351 | stream.channel_name[LTTNG_VIEWER_NAME_MAX - 1] = '\0'; | |
4a744367 JD |
352 | |
353 | printf_verbose(" stream %" PRIu64 " : %s/%s\n", | |
354 | be64toh(stream.id), stream.path_name, | |
355 | stream.channel_name); | |
356 | ctx->session->streams[i].id = be64toh(stream.id); | |
357 | ctx->session->streams[i].session = ctx->session; | |
358 | ||
359 | ctx->session->streams[i].first_read = 1; | |
360 | ctx->session->streams[i].mmap_size = 0; | |
361 | ||
362 | if (be32toh(stream.metadata_flag)) { | |
363 | char *path; | |
364 | ||
365 | path = strdup(LTTNG_METADATA_PATH_TEMPLATE); | |
6a4d2b5a MD |
366 | if (!path) { |
367 | perror("strdup"); | |
368 | ret = -1; | |
369 | goto error; | |
370 | } | |
371 | if (!mkdtemp(path)) { | |
372 | perror("mkdtemp"); | |
373 | free(path); | |
374 | ret = -1; | |
375 | goto error; | |
376 | } | |
4a744367 | 377 | ctx->session->streams[i].metadata_flag = 1; |
4a744367 JD |
378 | snprintf(ctx->session->streams[i].path, |
379 | sizeof(ctx->session->streams[i].path), | |
380 | "%s/%s", path, | |
381 | stream.channel_name); | |
382 | ret = open(ctx->session->streams[i].path, | |
383 | O_WRONLY | O_CREAT | O_TRUNC, | |
384 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
385 | if (ret < 0) { | |
ab9d07f0 | 386 | perror("open"); |
6a4d2b5a | 387 | free(path); |
4a744367 JD |
388 | goto error; |
389 | } | |
390 | ctx->session->streams[i].fd = ret; | |
6a4d2b5a | 391 | free(path); |
4a744367 JD |
392 | } |
393 | ret = lttng_live_ctf_trace_assign(&ctx->session->streams[i], | |
394 | be64toh(stream.ctf_trace_id)); | |
395 | if (ret < 0) { | |
396 | goto error; | |
397 | } | |
398 | ||
399 | } | |
400 | ret = 0; | |
401 | ||
402 | end: | |
403 | error: | |
404 | return ret; | |
405 | } | |
406 | ||
407 | static | |
408 | int get_data_packet(struct lttng_live_ctx *ctx, | |
409 | struct ctf_stream_pos *pos, | |
410 | struct lttng_live_viewer_stream *stream, uint64_t offset, | |
411 | uint64_t len) | |
412 | { | |
413 | struct lttng_viewer_cmd cmd; | |
414 | struct lttng_viewer_get_packet rq; | |
415 | struct lttng_viewer_trace_packet rp; | |
416 | ssize_t ret_len; | |
417 | int ret; | |
418 | ||
419 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_PACKET); | |
420 | cmd.data_size = sizeof(rq); | |
421 | cmd.cmd_version = 0; | |
422 | ||
423 | memset(&rq, 0, sizeof(rq)); | |
424 | rq.stream_id = htobe64(stream->id); | |
425 | /* Already in big endian. */ | |
426 | rq.offset = offset; | |
427 | rq.len = htobe32(len); | |
428 | ||
429 | do { | |
430 | ret_len = send(ctx->control_sock, &cmd, sizeof(cmd), 0); | |
431 | } while (ret_len < 0 && errno == EINTR); | |
432 | if (ret_len < 0) { | |
433 | fprintf(stderr, "[error] Error sending cmd\n"); | |
434 | ret = ret_len; | |
435 | goto error; | |
436 | } | |
437 | assert(ret_len == sizeof(cmd)); | |
438 | ||
439 | do { | |
440 | ret_len = send(ctx->control_sock, &rq, sizeof(rq), 0); | |
441 | } while (ret_len < 0 && errno == EINTR); | |
442 | if (ret_len < 0) { | |
443 | fprintf(stderr, "[error] Error sending get_data_packet request\n"); | |
444 | ret = ret_len; | |
445 | goto error; | |
446 | } | |
447 | assert(ret_len == sizeof(rq)); | |
448 | ||
449 | do { | |
450 | ret_len = recv(ctx->control_sock, &rp, sizeof(rp), 0); | |
451 | } while (ret_len < 0 && errno == EINTR); | |
452 | if (ret_len < 0) { | |
453 | fprintf(stderr, "[error] Error receiving data response\n"); | |
454 | ret = ret_len; | |
455 | goto error; | |
456 | } | |
457 | assert(ret_len == sizeof(rp)); | |
458 | ||
459 | rp.flags = be32toh(rp.flags); | |
460 | ||
461 | switch (be32toh(rp.status)) { | |
462 | case LTTNG_VIEWER_GET_PACKET_OK: | |
463 | len = be32toh(rp.len); | |
464 | printf_verbose("get_data_packet: Ok, packet size : %" PRIu64 | |
465 | "\n", len); | |
466 | break; | |
467 | case LTTNG_VIEWER_GET_PACKET_RETRY: | |
468 | printf_verbose("get_data_packet: retry\n"); | |
469 | ret = -1; | |
470 | goto end; | |
471 | case LTTNG_VIEWER_GET_PACKET_ERR: | |
472 | if (rp.flags & LTTNG_VIEWER_FLAG_NEW_METADATA) { | |
473 | printf_verbose("get_data_packet: new metadata needed\n"); | |
474 | ret = 0; | |
475 | goto end; | |
476 | } | |
477 | fprintf(stderr, "[error] get_data_packet: error\n"); | |
478 | ret = -1; | |
479 | goto end; | |
480 | case LTTNG_VIEWER_GET_PACKET_EOF: | |
481 | ret = -2; | |
482 | goto error; | |
483 | default: | |
484 | printf_verbose("get_data_packet: unknown\n"); | |
485 | assert(0); | |
486 | ret = -1; | |
487 | goto end; | |
488 | } | |
489 | ||
490 | if (len <= 0) { | |
491 | ret = -1; | |
492 | goto end; | |
493 | } | |
494 | ||
495 | if (len > stream->mmap_size) { | |
496 | uint64_t new_size; | |
497 | ||
498 | new_size = max_t(uint64_t, len, stream->mmap_size << 1); | |
499 | if (pos->base_mma) { | |
500 | /* unmap old base */ | |
501 | ret = munmap_align(pos->base_mma); | |
502 | if (ret) { | |
503 | fprintf(stderr, "[error] Unable to unmap old base: %s.\n", | |
504 | strerror(errno)); | |
505 | ret = -1; | |
506 | goto error; | |
507 | } | |
508 | pos->base_mma = NULL; | |
509 | } | |
510 | pos->base_mma = mmap_align(new_size, | |
511 | PROT_READ | PROT_WRITE, | |
512 | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); | |
513 | if (pos->base_mma == MAP_FAILED) { | |
514 | fprintf(stderr, "[error] mmap error %s.\n", | |
515 | strerror(errno)); | |
516 | pos->base_mma = NULL; | |
517 | ret = -1; | |
518 | goto error; | |
519 | } | |
520 | ||
521 | stream->mmap_size = new_size; | |
522 | printf_verbose("Expanding stream mmap size to %" PRIu64 " bytes\n", | |
523 | stream->mmap_size); | |
524 | } | |
525 | ||
526 | do { | |
527 | ret_len = recv(ctx->control_sock, | |
528 | mmap_align_addr(pos->base_mma), len, | |
529 | MSG_WAITALL); | |
530 | } while (ret_len < 0 && errno == EINTR); | |
531 | if (ret_len < 0) { | |
532 | fprintf(stderr, "[error] Error receiving trace packet\n"); | |
533 | ret = ret_len; | |
534 | goto error; | |
535 | } | |
536 | assert(ret_len == len); | |
537 | ||
538 | end: | |
539 | error: | |
540 | return ret; | |
541 | } | |
542 | ||
543 | /* | |
544 | * Return number of metadata bytes written or a negative value on error. | |
545 | */ | |
546 | static | |
547 | int get_new_metadata(struct lttng_live_ctx *ctx, | |
548 | struct lttng_live_viewer_stream *viewer_stream, | |
549 | uint64_t *metadata_len) | |
550 | { | |
551 | uint64_t len = 0; | |
552 | int ret; | |
553 | struct lttng_viewer_cmd cmd; | |
554 | struct lttng_viewer_get_metadata rq; | |
555 | struct lttng_viewer_metadata_packet rp; | |
556 | struct lttng_live_viewer_stream *metadata_stream; | |
557 | char *data = NULL; | |
558 | ssize_t ret_len; | |
559 | ||
560 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_METADATA); | |
561 | cmd.data_size = sizeof(rq); | |
562 | cmd.cmd_version = 0; | |
563 | ||
564 | metadata_stream = viewer_stream->ctf_trace->metadata_stream; | |
565 | rq.stream_id = htobe64(metadata_stream->id); | |
566 | ||
567 | do { | |
568 | ret_len = send(ctx->control_sock, &cmd, sizeof(cmd), 0); | |
569 | } while (ret_len < 0 && errno == EINTR); | |
570 | if (ret_len < 0) { | |
571 | fprintf(stderr, "[error] Error sending cmd\n"); | |
572 | ret = ret_len; | |
573 | goto error; | |
574 | } | |
575 | assert(ret_len == sizeof(cmd)); | |
576 | ||
577 | do { | |
578 | ret_len = send(ctx->control_sock, &rq, sizeof(rq), 0); | |
579 | } while (ret_len < 0 && errno == EINTR); | |
580 | if (ret_len < 0) { | |
581 | fprintf(stderr, "[error] Error sending get_metadata request\n"); | |
582 | ret = ret_len; | |
583 | goto error; | |
584 | } | |
585 | assert(ret_len == sizeof(rq)); | |
586 | ||
587 | do { | |
588 | ret_len = recv(ctx->control_sock, &rp, sizeof(rp), 0); | |
589 | } while (ret_len < 0 && errno == EINTR); | |
590 | if (ret_len < 0) { | |
591 | fprintf(stderr, "[error] Error receiving metadata response\n"); | |
592 | ret = ret_len; | |
593 | goto error; | |
594 | } | |
595 | assert(ret_len == sizeof(rp)); | |
596 | ||
597 | switch (be32toh(rp.status)) { | |
598 | case LTTNG_VIEWER_METADATA_OK: | |
599 | printf_verbose("get_metadata : OK\n"); | |
600 | break; | |
601 | case LTTNG_VIEWER_NO_NEW_METADATA: | |
602 | printf_verbose("get_metadata : NO NEW\n"); | |
603 | ret = -1; | |
604 | goto end; | |
605 | case LTTNG_VIEWER_METADATA_ERR: | |
606 | printf_verbose("get_metadata : ERR\n"); | |
607 | ret = -1; | |
608 | goto end; | |
609 | default: | |
610 | printf_verbose("get_metadata : UNKNOWN\n"); | |
611 | ret = -1; | |
612 | goto end; | |
613 | } | |
614 | ||
615 | len = be64toh(rp.len); | |
616 | printf_verbose("Writing %" PRIu64" bytes to metadata\n", len); | |
617 | if (len <= 0) { | |
618 | ret = -1; | |
619 | goto end; | |
620 | } | |
621 | ||
622 | data = zmalloc(len); | |
623 | if (!data) { | |
624 | perror("relay data zmalloc"); | |
625 | ret = -1; | |
626 | goto error; | |
627 | } | |
628 | do { | |
629 | ret_len = recv(ctx->control_sock, data, len, MSG_WAITALL); | |
630 | } while (ret_len < 0 && errno == EINTR); | |
631 | if (ret_len < 0) { | |
632 | fprintf(stderr, "[error] Error receiving trace packet\n"); | |
633 | ret = ret_len; | |
634 | free(data); | |
635 | goto error; | |
636 | } | |
637 | assert(ret_len == len); | |
638 | ||
639 | do { | |
640 | ret_len = write(metadata_stream->fd, data, len); | |
641 | } while (ret_len < 0 && errno == EINTR); | |
642 | if (ret_len < 0) { | |
643 | free(data); | |
644 | ret = ret_len; | |
645 | goto error; | |
646 | } | |
647 | assert(ret_len == len); | |
648 | ||
649 | free(data); | |
650 | ||
651 | *metadata_len = len; | |
652 | ret = 0; | |
653 | end: | |
654 | error: | |
655 | return ret; | |
656 | } | |
657 | ||
658 | /* | |
659 | * Get one index for a stream. | |
660 | * | |
661 | * Returns 0 on success or a negative value on error. | |
662 | */ | |
663 | static | |
664 | int get_next_index(struct lttng_live_ctx *ctx, | |
665 | struct lttng_live_viewer_stream *viewer_stream, | |
666 | struct packet_index *index) | |
667 | { | |
668 | struct lttng_viewer_cmd cmd; | |
669 | struct lttng_viewer_get_next_index rq; | |
670 | struct lttng_viewer_index rp; | |
671 | int ret; | |
672 | uint64_t metadata_len; | |
673 | ssize_t ret_len; | |
674 | ||
675 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_NEXT_INDEX); | |
676 | cmd.data_size = sizeof(rq); | |
677 | cmd.cmd_version = 0; | |
678 | ||
679 | memset(&rq, 0, sizeof(rq)); | |
680 | rq.stream_id = htobe64(viewer_stream->id); | |
681 | ||
682 | retry: | |
683 | do { | |
684 | ret_len = send(ctx->control_sock, &cmd, sizeof(cmd), 0); | |
685 | } while (ret_len < 0 && errno == EINTR); | |
686 | if (ret_len < 0) { | |
687 | fprintf(stderr, "[error] Error sending cmd\n"); | |
688 | ret = ret_len; | |
689 | goto error; | |
690 | } | |
691 | assert(ret_len == sizeof(cmd)); | |
692 | ||
693 | do { | |
694 | ret_len = send(ctx->control_sock, &rq, sizeof(rq), 0); | |
695 | } while (ret_len < 0 && errno == EINTR); | |
696 | if (ret_len < 0) { | |
697 | fprintf(stderr, "[error] Error sending get_next_index request\n"); | |
698 | ret = ret_len; | |
699 | goto error; | |
700 | } | |
701 | assert(ret_len == sizeof(rq)); | |
702 | ||
703 | do { | |
704 | ret_len = recv(ctx->control_sock, &rp, sizeof(rp), 0); | |
705 | } while (ret_len < 0 && errno == EINTR); | |
706 | if (ret_len < 0) { | |
707 | fprintf(stderr, "[error] Error receiving index response\n"); | |
708 | ret = ret_len; | |
709 | goto error; | |
710 | } | |
711 | assert(ret_len == sizeof(rp)); | |
712 | ||
713 | rp.flags = be32toh(rp.flags); | |
714 | ||
715 | switch (be32toh(rp.status)) { | |
716 | case LTTNG_VIEWER_INDEX_INACTIVE: | |
717 | printf_verbose("get_next_index: inactive\n"); | |
718 | memset(index, 0, sizeof(struct packet_index)); | |
719 | index->timestamp_end = be64toh(rp.timestamp_end); | |
720 | break; | |
721 | case LTTNG_VIEWER_INDEX_OK: | |
722 | printf_verbose("get_next_index: Ok, need metadata update : %u\n", | |
723 | rp.flags & LTTNG_VIEWER_FLAG_NEW_METADATA); | |
724 | index->offset = be64toh(rp.offset); | |
725 | index->packet_size = be64toh(rp.packet_size); | |
726 | index->content_size = be64toh(rp.content_size); | |
727 | index->timestamp_begin = be64toh(rp.timestamp_begin); | |
728 | index->timestamp_end = be64toh(rp.timestamp_end); | |
729 | index->events_discarded = be64toh(rp.events_discarded); | |
730 | ||
731 | if (rp.flags & LTTNG_VIEWER_FLAG_NEW_METADATA) { | |
732 | printf_verbose("get_next_index: new metadata needed\n"); | |
733 | ret = get_new_metadata(ctx, viewer_stream, | |
734 | &metadata_len); | |
735 | if (ret < 0) { | |
736 | goto error; | |
737 | } | |
738 | } | |
739 | break; | |
740 | case LTTNG_VIEWER_INDEX_RETRY: | |
741 | printf_verbose("get_next_index: retry\n"); | |
742 | sleep(1); | |
743 | goto retry; | |
744 | case LTTNG_VIEWER_INDEX_HUP: | |
745 | printf_verbose("get_next_index: stream hung up\n"); | |
746 | viewer_stream->id = -1ULL; | |
747 | viewer_stream->fd = -1; | |
748 | index->offset = EOF; | |
749 | break; | |
750 | case LTTNG_VIEWER_INDEX_ERR: | |
751 | fprintf(stderr, "[error] get_next_index: error\n"); | |
752 | ret = -1; | |
753 | goto error; | |
754 | default: | |
755 | fprintf(stderr, "[error] get_next_index: unkwown value\n"); | |
756 | ret = -1; | |
757 | goto error; | |
758 | } | |
759 | ||
760 | ret = 0; | |
761 | ||
762 | error: | |
763 | return ret; | |
764 | } | |
765 | ||
766 | void ctf_live_packet_seek(struct bt_stream_pos *stream_pos, size_t index, | |
767 | int whence) | |
768 | { | |
769 | struct ctf_stream_pos *pos; | |
770 | struct ctf_file_stream *file_stream; | |
771 | struct packet_index packet_index; | |
772 | struct lttng_live_viewer_stream *viewer_stream; | |
773 | struct lttng_live_session *session; | |
774 | int ret; | |
775 | ||
776 | retry: | |
777 | pos = ctf_pos(stream_pos); | |
778 | file_stream = container_of(pos, struct ctf_file_stream, pos); | |
779 | viewer_stream = (struct lttng_live_viewer_stream *) pos->priv; | |
780 | session = viewer_stream->session; | |
781 | ||
782 | printf_verbose("get_next_index for stream %" PRIu64 "\n", viewer_stream->id); | |
783 | ret = get_next_index(session->ctx, viewer_stream, &packet_index); | |
784 | if (ret < 0) { | |
785 | pos->offset = EOF; | |
786 | fprintf(stderr, "[error] get_next_index failed\n"); | |
787 | return; | |
788 | } | |
789 | ||
790 | pos->packet_size = packet_index.packet_size; | |
791 | pos->content_size = packet_index.content_size; | |
792 | pos->mmap_base_offset = 0; | |
793 | if (packet_index.offset == EOF) { | |
794 | pos->offset = EOF; | |
795 | } else { | |
796 | pos->offset = 0; | |
797 | } | |
798 | ||
799 | if (packet_index.content_size == 0) { | |
800 | file_stream->parent.cycles_timestamp = packet_index.timestamp_end; | |
801 | file_stream->parent.real_timestamp = ctf_get_real_timestamp( | |
802 | &file_stream->parent, packet_index.timestamp_end); | |
803 | } else { | |
804 | file_stream->parent.cycles_timestamp = packet_index.timestamp_begin; | |
805 | file_stream->parent.real_timestamp = ctf_get_real_timestamp( | |
806 | &file_stream->parent, packet_index.timestamp_begin); | |
807 | } | |
808 | ||
809 | if (pos->packet_size == 0 || pos->offset == EOF) { | |
810 | goto end; | |
811 | } | |
812 | ||
813 | printf_verbose("get_data_packet for stream %" PRIu64 "\n", | |
814 | viewer_stream->id); | |
815 | ret = get_data_packet(session->ctx, pos, viewer_stream, | |
816 | be64toh(packet_index.offset), | |
817 | packet_index.packet_size / CHAR_BIT); | |
818 | if (ret == -2) { | |
819 | goto retry; | |
820 | } else if (ret < 0) { | |
821 | pos->offset = EOF; | |
822 | fprintf(stderr, "[error] get_data_packet failed\n"); | |
823 | return; | |
824 | } | |
825 | ||
826 | printf_verbose("Index received : packet_size : %" PRIu64 | |
827 | ", offset %" PRIu64 ", content_size %" PRIu64 | |
828 | ", timestamp_end : %" PRIu64 "\n", | |
829 | packet_index.packet_size, packet_index.offset, | |
830 | packet_index.content_size, packet_index.timestamp_end); | |
831 | ||
832 | /* update trace_packet_header and stream_packet_context */ | |
833 | if (pos->prot != PROT_WRITE && file_stream->parent.trace_packet_header) { | |
834 | /* Read packet header */ | |
835 | ret = generic_rw(&pos->parent, &file_stream->parent.trace_packet_header->p); | |
836 | if (ret) { | |
837 | pos->offset = EOF; | |
838 | fprintf(stderr, "[error] trace packet header read failed\n"); | |
839 | goto end; | |
840 | } | |
841 | } | |
842 | if (pos->prot != PROT_WRITE && file_stream->parent.stream_packet_context) { | |
843 | /* Read packet context */ | |
844 | ret = generic_rw(&pos->parent, &file_stream->parent.stream_packet_context->p); | |
845 | if (ret) { | |
846 | pos->offset = EOF; | |
847 | fprintf(stderr, "[error] stream packet context read failed\n"); | |
848 | goto end; | |
849 | } | |
850 | } | |
851 | pos->data_offset = pos->offset; | |
852 | ||
853 | end: | |
854 | return; | |
855 | } | |
856 | ||
857 | static int del_traces(gpointer key, gpointer value, gpointer user_data) | |
858 | { | |
859 | struct bt_context *bt_ctx = user_data; | |
860 | struct lttng_live_ctf_trace *trace = value; | |
861 | int ret; | |
862 | ||
863 | ret = bt_context_remove_trace(bt_ctx, trace->trace_id); | |
864 | if (ret < 0) | |
865 | fprintf(stderr, "[error] removing trace from context\n"); | |
866 | ||
867 | /* remove the key/value pair from the HT. */ | |
868 | return 1; | |
869 | } | |
870 | ||
871 | static void add_traces(gpointer key, gpointer value, gpointer user_data) | |
872 | { | |
873 | int i, ret, total_metadata = 0; | |
874 | uint64_t metadata_len; | |
875 | struct bt_context *bt_ctx = user_data; | |
876 | struct lttng_live_ctf_trace *trace = value; | |
877 | struct lttng_live_viewer_stream *stream; | |
878 | struct bt_mmap_stream *new_mmap_stream; | |
879 | struct bt_mmap_stream_list mmap_list; | |
880 | struct lttng_live_ctx *ctx = NULL; | |
881 | ||
882 | BT_INIT_LIST_HEAD(&mmap_list.head); | |
883 | ||
884 | for (i = 0; i < trace->streams->len; i++) { | |
885 | stream = g_ptr_array_index(trace->streams, i); | |
886 | ctx = stream->session->ctx; | |
887 | ||
888 | if (!stream->metadata_flag) { | |
889 | new_mmap_stream = zmalloc(sizeof(struct bt_mmap_stream)); | |
890 | new_mmap_stream->priv = (void *) stream; | |
891 | new_mmap_stream->fd = -1; | |
892 | bt_list_add(&new_mmap_stream->list, &mmap_list.head); | |
893 | } else { | |
894 | /* Get all possible metadata before starting */ | |
895 | do { | |
896 | ret = get_new_metadata(ctx, stream, | |
897 | &metadata_len); | |
898 | if (ret == 0) { | |
899 | total_metadata += metadata_len; | |
900 | } | |
901 | } while (ret == 0 || total_metadata == 0); | |
902 | trace->metadata_fp = fopen(stream->path, "r"); | |
903 | } | |
904 | } | |
905 | ||
906 | if (!trace->metadata_fp) { | |
907 | fprintf(stderr, "[error] No metadata stream opened\n"); | |
908 | goto end_free; | |
909 | } | |
910 | ||
911 | ret = bt_context_add_trace(bt_ctx, NULL, "ctf", | |
912 | ctf_live_packet_seek, &mmap_list, trace->metadata_fp); | |
913 | if (ret < 0) { | |
914 | fprintf(stderr, "[error] Error adding trace\n"); | |
915 | goto end_free; | |
916 | } | |
917 | trace->trace_id = ret; | |
918 | ||
919 | goto end; | |
920 | ||
921 | end_free: | |
922 | bt_context_put(bt_ctx); | |
923 | end: | |
924 | return; | |
925 | } | |
926 | ||
927 | void lttng_live_read(struct lttng_live_ctx *ctx, uint64_t session_id) | |
928 | { | |
929 | int ret, active_session = 0; | |
930 | struct bt_context *bt_ctx; | |
931 | struct bt_ctf_iter *iter; | |
932 | const struct bt_ctf_event *event; | |
933 | struct bt_iter_pos begin_pos; | |
934 | struct bt_trace_descriptor *td_write; | |
935 | struct bt_format *fmt_write; | |
936 | struct ctf_text_stream_pos *sout; | |
937 | ||
938 | bt_ctx = bt_context_create(); | |
939 | if (!bt_ctx) { | |
940 | fprintf(stderr, "[error] bt_context_create allocation\n"); | |
941 | goto end; | |
942 | } | |
943 | ||
944 | fmt_write = bt_lookup_format(g_quark_from_static_string("text")); | |
945 | if (!fmt_write) { | |
946 | fprintf(stderr, "[error] ctf-text error\n"); | |
947 | goto end; | |
948 | } | |
949 | ||
950 | td_write = fmt_write->open_trace(NULL, O_RDWR, NULL, NULL); | |
951 | if (!td_write) { | |
952 | fprintf(stderr, "[error] Error opening output trace\n"); | |
953 | goto end_free; | |
954 | } | |
955 | ||
956 | sout = container_of(td_write, struct ctf_text_stream_pos, | |
957 | trace_descriptor); | |
958 | if (!sout->parent.event_cb) | |
959 | goto end_free; | |
960 | ||
961 | /* | |
962 | * As long as the session is active, we try to reattach to it, | |
963 | * even if all the streams get closed. | |
964 | */ | |
965 | do { | |
966 | int flags; | |
967 | ||
968 | do { | |
969 | ret = lttng_live_attach_session(ctx, session_id); | |
970 | printf_verbose("Attaching session returns %d\n", ret); | |
971 | if (ret < 0) { | |
972 | if (ret == -LTTNG_VIEWER_ATTACH_UNK) { | |
973 | if (active_session) | |
974 | goto end_free; | |
975 | fprintf(stderr, "[error] Unknown " | |
976 | "session ID\n"); | |
977 | } | |
978 | goto end_free; | |
979 | } else { | |
980 | active_session = 1; | |
981 | } | |
982 | } while (ctx->session->stream_count == 0); | |
983 | ||
984 | g_hash_table_foreach(ctx->session->ctf_traces, add_traces, bt_ctx); | |
985 | ||
986 | begin_pos.type = BT_SEEK_BEGIN; | |
987 | iter = bt_ctf_iter_create(bt_ctx, &begin_pos, NULL); | |
988 | if (!iter) { | |
989 | fprintf(stderr, "[error] Iterator creation error\n"); | |
990 | goto end; | |
991 | } | |
992 | for (;;) { | |
993 | event = bt_ctf_iter_read_event_flags(iter, &flags); | |
994 | if (!(flags & BT_ITER_FLAG_RETRY)) { | |
995 | if (!event) { | |
996 | /* End of trace */ | |
997 | break; | |
998 | } | |
999 | ret = sout->parent.event_cb(&sout->parent, | |
1000 | event->parent->stream); | |
1001 | if (ret) { | |
1002 | fprintf(stderr, "[error] Writing " | |
1003 | "event failed.\n"); | |
1004 | goto end_free; | |
1005 | } | |
1006 | } | |
1007 | ret = bt_iter_next(bt_ctf_get_iter(iter)); | |
1008 | if (ret < 0) { | |
1009 | goto end_free; | |
1010 | } | |
1011 | } | |
1012 | bt_ctf_iter_destroy(iter); | |
1013 | g_hash_table_foreach_remove(ctx->session->ctf_traces, del_traces, bt_ctx); | |
1014 | } while (active_session); | |
1015 | ||
1016 | end_free: | |
1017 | bt_context_put(bt_ctx); | |
1018 | end: | |
1019 | return; | |
1020 | } |