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) { | |
74f97e7d | 131 | perror("[error] Error sending cmd"); |
12a91e9d JD |
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) { | |
74f97e7d | 141 | perror("[error] Error sending version"); |
12a91e9d JD |
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); | |
74f97e7d JD |
150 | if (ret_len == 0) { |
151 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
152 | ret = -1; | |
153 | goto error; | |
154 | } | |
12a91e9d | 155 | if (ret_len < 0) { |
74f97e7d | 156 | perror("[error] Error receiving version"); |
12a91e9d JD |
157 | ret = ret_len; |
158 | goto error; | |
159 | } | |
160 | assert(ret_len == sizeof(connect)); | |
161 | ||
162 | printf_verbose("Received viewer session ID : %" PRIu64 "\n", | |
163 | be64toh(connect.viewer_session_id)); | |
164 | printf_verbose("Relayd version : %u.%u\n", be32toh(connect.major), | |
165 | be32toh(connect.minor)); | |
166 | ||
167 | ret = 0; | |
168 | ||
169 | error: | |
170 | return ret; | |
171 | } | |
172 | ||
d81179de JD |
173 | static |
174 | void free_session_list(GPtrArray *session_list) | |
175 | { | |
176 | int i; | |
177 | struct lttng_live_relay_session *relay_session; | |
178 | ||
179 | for (i = 0; i < session_list->len; i++) { | |
180 | relay_session = g_ptr_array_index(session_list, i); | |
181 | free(relay_session->name); | |
182 | free(relay_session->hostname); | |
183 | } | |
184 | g_ptr_array_free(session_list, TRUE); | |
185 | } | |
186 | ||
187 | static | |
188 | void print_session_list(GPtrArray *session_list, const char *path) | |
189 | { | |
190 | int i; | |
191 | struct lttng_live_relay_session *relay_session; | |
192 | ||
193 | for (i = 0; i < session_list->len; i++) { | |
194 | relay_session = g_ptr_array_index(session_list, i); | |
195 | fprintf(stdout, "%s/host/%s/%s (timer = %u, " | |
196 | "%u stream(s), %u client(s) connected)\n", | |
197 | path, relay_session->hostname, | |
198 | relay_session->name, relay_session->timer, | |
199 | relay_session->streams, relay_session->clients); | |
200 | } | |
201 | } | |
202 | ||
203 | static | |
204 | void update_session_list(GPtrArray *session_list, char *hostname, | |
205 | char *session_name, uint32_t streams, uint32_t clients, | |
206 | uint32_t timer) | |
207 | { | |
208 | int i, found = 0; | |
209 | struct lttng_live_relay_session *relay_session; | |
210 | ||
211 | for (i = 0; i < session_list->len; i++) { | |
212 | relay_session = g_ptr_array_index(session_list, i); | |
213 | if ((strncmp(relay_session->hostname, hostname, NAME_MAX) == 0) && | |
214 | strncmp(relay_session->name, | |
215 | session_name, NAME_MAX) == 0) { | |
216 | relay_session->streams += streams; | |
217 | if (relay_session->clients < clients) | |
218 | relay_session->clients = clients; | |
219 | found = 1; | |
220 | break; | |
221 | } | |
222 | } | |
223 | if (found) | |
224 | return; | |
225 | ||
226 | relay_session = g_new0(struct lttng_live_relay_session, 1); | |
227 | relay_session->hostname = strndup(hostname, NAME_MAX); | |
228 | relay_session->name = strndup(session_name, NAME_MAX); | |
229 | relay_session->clients = clients; | |
230 | relay_session->streams = streams; | |
231 | relay_session->timer = timer; | |
232 | g_ptr_array_add(session_list, relay_session); | |
233 | } | |
234 | ||
12a91e9d JD |
235 | int lttng_live_list_sessions(struct lttng_live_ctx *ctx, const char *path) |
236 | { | |
237 | struct lttng_viewer_cmd cmd; | |
238 | struct lttng_viewer_list_sessions list; | |
239 | struct lttng_viewer_session lsession; | |
d81179de | 240 | int i, ret, sessions_count, print_list = 0; |
12a91e9d | 241 | ssize_t ret_len; |
d81179de JD |
242 | uint64_t session_id; |
243 | GPtrArray *session_list = NULL; | |
244 | ||
245 | if (strlen(ctx->session_name) == 0) { | |
246 | print_list = 1; | |
247 | session_list = g_ptr_array_new(); | |
248 | } | |
12a91e9d JD |
249 | |
250 | cmd.cmd = htobe32(LTTNG_VIEWER_LIST_SESSIONS); | |
251 | cmd.data_size = 0; | |
252 | cmd.cmd_version = 0; | |
253 | ||
254 | do { | |
255 | ret_len = send(ctx->control_sock, &cmd, sizeof(cmd), 0); | |
256 | } while (ret_len < 0 && errno == EINTR); | |
257 | if (ret_len < 0) { | |
74f97e7d | 258 | perror("[error] Error sending cmd"); |
12a91e9d JD |
259 | ret = ret_len; |
260 | goto error; | |
261 | } | |
262 | assert(ret_len == sizeof(cmd)); | |
263 | ||
264 | do { | |
265 | ret_len = recv(ctx->control_sock, &list, sizeof(list), 0); | |
266 | } while (ret_len < 0 && errno == EINTR); | |
74f97e7d JD |
267 | if (ret_len == 0) { |
268 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
269 | ret = -1; | |
270 | goto error; | |
271 | } | |
12a91e9d | 272 | if (ret_len < 0) { |
74f97e7d | 273 | perror("[error] Error receiving session list"); |
12a91e9d JD |
274 | ret = ret_len; |
275 | goto error; | |
276 | } | |
277 | assert(ret_len == sizeof(list)); | |
278 | ||
279 | sessions_count = be32toh(list.sessions_count); | |
12a91e9d JD |
280 | for (i = 0; i < sessions_count; i++) { |
281 | do { | |
282 | ret_len = recv(ctx->control_sock, &lsession, sizeof(lsession), 0); | |
283 | } while (ret_len < 0 && errno == EINTR); | |
74f97e7d JD |
284 | if (ret_len == 0) { |
285 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
286 | ret = -1; | |
287 | goto error; | |
288 | } | |
12a91e9d | 289 | if (ret_len < 0) { |
74f97e7d | 290 | perror("[error] Error receiving session"); |
12a91e9d JD |
291 | ret = ret_len; |
292 | goto error; | |
293 | } | |
294 | assert(ret_len == sizeof(lsession)); | |
295 | lsession.hostname[LTTNG_VIEWER_HOST_NAME_MAX - 1] = '\0'; | |
296 | lsession.session_name[LTTNG_VIEWER_NAME_MAX - 1] = '\0'; | |
d81179de JD |
297 | session_id = be64toh(lsession.id); |
298 | ||
299 | if (print_list) { | |
300 | update_session_list(session_list, | |
301 | lsession.hostname, | |
302 | lsession.session_name, | |
303 | be32toh(lsession.streams), | |
304 | be32toh(lsession.clients), | |
305 | be32toh(lsession.live_timer)); | |
306 | } else { | |
307 | if ((strncmp(lsession.session_name, ctx->session_name, | |
308 | NAME_MAX) == 0) && (strncmp(lsession.hostname, | |
309 | ctx->traced_hostname, NAME_MAX) == 0)) { | |
310 | printf_verbose("Reading from session %" PRIu64 "\n", | |
311 | session_id); | |
312 | g_array_append_val(ctx->session_ids, | |
313 | session_id); | |
314 | } | |
315 | } | |
316 | } | |
12a91e9d | 317 | |
d81179de JD |
318 | if (print_list) { |
319 | print_session_list(session_list, path); | |
320 | free_session_list(session_list); | |
12a91e9d JD |
321 | } |
322 | ||
323 | ret = 0; | |
324 | ||
325 | error: | |
326 | return ret; | |
327 | } | |
328 | ||
329 | int lttng_live_ctf_trace_assign(struct lttng_live_viewer_stream *stream, | |
330 | uint64_t ctf_trace_id) | |
331 | { | |
332 | struct lttng_live_ctf_trace *trace; | |
333 | int ret = 0; | |
334 | ||
335 | trace = g_hash_table_lookup(stream->session->ctf_traces, | |
336 | (gpointer) ctf_trace_id); | |
337 | if (!trace) { | |
338 | trace = g_new0(struct lttng_live_ctf_trace, 1); | |
339 | trace->ctf_trace_id = ctf_trace_id; | |
340 | trace->streams = g_ptr_array_new(); | |
341 | g_hash_table_insert(stream->session->ctf_traces, | |
342 | (gpointer) ctf_trace_id, | |
343 | trace); | |
344 | } | |
345 | if (stream->metadata_flag) | |
346 | trace->metadata_stream = stream; | |
347 | ||
348 | stream->ctf_trace = trace; | |
349 | g_ptr_array_add(trace->streams, stream); | |
350 | ||
351 | return ret; | |
352 | } | |
353 | ||
354 | int lttng_live_attach_session(struct lttng_live_ctx *ctx, uint64_t id) | |
355 | { | |
356 | struct lttng_viewer_cmd cmd; | |
357 | struct lttng_viewer_attach_session_request rq; | |
358 | struct lttng_viewer_attach_session_response rp; | |
359 | struct lttng_viewer_stream stream; | |
360 | int ret, i; | |
361 | ssize_t ret_len; | |
362 | ||
363 | cmd.cmd = htobe32(LTTNG_VIEWER_ATTACH_SESSION); | |
364 | cmd.data_size = sizeof(rq); | |
365 | cmd.cmd_version = 0; | |
366 | ||
367 | memset(&rq, 0, sizeof(rq)); | |
368 | rq.session_id = htobe64(id); | |
369 | // TODO: add cmd line parameter to select seek beginning | |
370 | // rq.seek = htobe32(LTTNG_VIEWER_SEEK_BEGINNING); | |
371 | rq.seek = htobe32(LTTNG_VIEWER_SEEK_LAST); | |
372 | ||
373 | do { | |
374 | ret_len = send(ctx->control_sock, &cmd, sizeof(cmd), 0); | |
375 | } while (ret_len < 0 && errno == EINTR); | |
376 | if (ret_len < 0) { | |
74f97e7d | 377 | perror("[error] Error sending cmd"); |
12a91e9d JD |
378 | ret = ret_len; |
379 | goto error; | |
380 | } | |
381 | assert(ret_len == sizeof(cmd)); | |
382 | ||
383 | do { | |
384 | ret_len = send(ctx->control_sock, &rq, sizeof(rq), 0); | |
385 | } while (ret_len < 0 && errno == EINTR); | |
386 | if (ret_len < 0) { | |
74f97e7d | 387 | perror("[error] Error sending attach request"); |
12a91e9d JD |
388 | ret = ret_len; |
389 | goto error; | |
390 | } | |
391 | assert(ret_len == sizeof(rq)); | |
392 | ||
393 | do { | |
394 | ret_len = recv(ctx->control_sock, &rp, sizeof(rp), 0); | |
395 | } while (ret_len < 0 && errno == EINTR); | |
74f97e7d JD |
396 | if (ret_len == 0) { |
397 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
398 | ret = -1; | |
399 | goto error; | |
400 | } | |
12a91e9d | 401 | if (ret_len < 0) { |
74f97e7d | 402 | perror("[error] Error receiving attach response"); |
12a91e9d JD |
403 | ret = ret_len; |
404 | goto error; | |
405 | } | |
406 | assert(ret_len == sizeof(rp)); | |
407 | ||
408 | switch(be32toh(rp.status)) { | |
409 | case LTTNG_VIEWER_ATTACH_OK: | |
410 | break; | |
411 | case LTTNG_VIEWER_ATTACH_UNK: | |
412 | ret = -LTTNG_VIEWER_ATTACH_UNK; | |
413 | goto end; | |
414 | case LTTNG_VIEWER_ATTACH_ALREADY: | |
74f97e7d | 415 | fprintf(stderr, "[error] There is already a viewer attached to this session\n"); |
12a91e9d JD |
416 | ret = -1; |
417 | goto end; | |
418 | case LTTNG_VIEWER_ATTACH_NOT_LIVE: | |
419 | fprintf(stderr, "[error] Not a live session\n"); | |
420 | ret = -1; | |
421 | goto end; | |
422 | case LTTNG_VIEWER_ATTACH_SEEK_ERR: | |
423 | fprintf(stderr, "[error] Wrong seek parameter\n"); | |
424 | ret = -1; | |
425 | goto end; | |
426 | default: | |
427 | fprintf(stderr, "[error] Unknown attach return code %u\n", | |
428 | be32toh(rp.status)); | |
429 | ret = -1; | |
430 | goto end; | |
431 | } | |
432 | if (be32toh(rp.status) != LTTNG_VIEWER_ATTACH_OK) { | |
433 | ret = -1; | |
434 | goto end; | |
435 | } | |
436 | ||
d81179de | 437 | ctx->session->stream_count += be32toh(rp.streams_count); |
12a91e9d JD |
438 | /* |
439 | * When the session is created but not started, we do an active wait | |
440 | * until it starts. It allows the viewer to start processing the trace | |
441 | * as soon as the session starts. | |
442 | */ | |
443 | if (ctx->session->stream_count == 0) { | |
444 | ret = 0; | |
445 | goto end; | |
446 | } | |
8fe4d0cf JD |
447 | printf_verbose("Waiting for %u streams:\n", |
448 | be32toh(rp.streams_count)); | |
12a91e9d JD |
449 | ctx->session->streams = g_new0(struct lttng_live_viewer_stream, |
450 | ctx->session->stream_count); | |
451 | for (i = 0; i < be32toh(rp.streams_count); i++) { | |
452 | do { | |
453 | ret_len = recv(ctx->control_sock, &stream, sizeof(stream), 0); | |
454 | } while (ret_len < 0 && errno == EINTR); | |
74f97e7d JD |
455 | if (ret_len == 0) { |
456 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
457 | ret = -1; | |
458 | goto error; | |
459 | } | |
12a91e9d | 460 | if (ret_len < 0) { |
74f97e7d | 461 | perror("[error] Error receiving stream"); |
12a91e9d JD |
462 | ret = ret_len; |
463 | goto error; | |
464 | } | |
465 | assert(ret_len == sizeof(stream)); | |
466 | stream.path_name[LTTNG_VIEWER_PATH_MAX - 1] = '\0'; | |
467 | stream.channel_name[LTTNG_VIEWER_NAME_MAX - 1] = '\0'; | |
468 | ||
469 | printf_verbose(" stream %" PRIu64 " : %s/%s\n", | |
470 | be64toh(stream.id), stream.path_name, | |
471 | stream.channel_name); | |
472 | ctx->session->streams[i].id = be64toh(stream.id); | |
473 | ctx->session->streams[i].session = ctx->session; | |
474 | ||
475 | ctx->session->streams[i].first_read = 1; | |
476 | ctx->session->streams[i].mmap_size = 0; | |
477 | ||
478 | if (be32toh(stream.metadata_flag)) { | |
479 | char *path; | |
480 | ||
481 | path = strdup(LTTNG_METADATA_PATH_TEMPLATE); | |
482 | if (!path) { | |
483 | perror("strdup"); | |
484 | ret = -1; | |
485 | goto error; | |
486 | } | |
487 | if (!mkdtemp(path)) { | |
488 | perror("mkdtemp"); | |
489 | free(path); | |
490 | ret = -1; | |
491 | goto error; | |
492 | } | |
493 | ctx->session->streams[i].metadata_flag = 1; | |
494 | snprintf(ctx->session->streams[i].path, | |
495 | sizeof(ctx->session->streams[i].path), | |
496 | "%s/%s", path, | |
497 | stream.channel_name); | |
498 | ret = open(ctx->session->streams[i].path, | |
499 | O_WRONLY | O_CREAT | O_TRUNC, | |
500 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
501 | if (ret < 0) { | |
502 | perror("open"); | |
503 | free(path); | |
504 | goto error; | |
505 | } | |
506 | ctx->session->streams[i].fd = ret; | |
507 | free(path); | |
508 | } | |
509 | ret = lttng_live_ctf_trace_assign(&ctx->session->streams[i], | |
510 | be64toh(stream.ctf_trace_id)); | |
511 | if (ret < 0) { | |
512 | goto error; | |
513 | } | |
514 | ||
515 | } | |
516 | ret = 0; | |
517 | ||
518 | end: | |
519 | error: | |
520 | return ret; | |
521 | } | |
522 | ||
d81179de JD |
523 | static |
524 | int ask_new_streams(struct lttng_live_ctx *ctx) | |
525 | { | |
526 | int i, ret = 0; | |
527 | uint64_t id; | |
528 | ||
529 | restart: | |
530 | for (i = 0; i < ctx->session_ids->len; i++) { | |
531 | id = g_array_index(ctx->session_ids, uint64_t, i); | |
532 | ret = lttng_live_get_new_streams(ctx, id); | |
533 | printf_verbose("Asking for new streams returns %d\n", | |
534 | ret); | |
535 | if (ret < 0) { | |
536 | if (ret == -LTTNG_VIEWER_NEW_STREAMS_HUP) { | |
537 | printf_verbose("Session %" PRIu64 " closed\n", | |
538 | id); | |
539 | /* | |
540 | * The streams have already been closed during | |
541 | * the reading, so we only need to get rid of | |
542 | * the trace in our internal table of sessions. | |
543 | */ | |
544 | g_array_remove_index(ctx->session_ids, i); | |
545 | /* | |
546 | * We can't continue iterating on the g_array | |
547 | * after a remove, we have to start again. | |
548 | */ | |
549 | goto restart; | |
550 | } else { | |
551 | ret = -1; | |
552 | goto end; | |
553 | } | |
554 | } | |
555 | } | |
556 | ||
557 | end: | |
558 | return ret; | |
559 | } | |
560 | ||
12a91e9d JD |
561 | static |
562 | int get_data_packet(struct lttng_live_ctx *ctx, | |
563 | struct ctf_stream_pos *pos, | |
564 | struct lttng_live_viewer_stream *stream, uint64_t offset, | |
565 | uint64_t len) | |
566 | { | |
567 | struct lttng_viewer_cmd cmd; | |
568 | struct lttng_viewer_get_packet rq; | |
569 | struct lttng_viewer_trace_packet rp; | |
570 | ssize_t ret_len; | |
571 | int ret; | |
572 | ||
573 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_PACKET); | |
574 | cmd.data_size = sizeof(rq); | |
575 | cmd.cmd_version = 0; | |
576 | ||
577 | memset(&rq, 0, sizeof(rq)); | |
578 | rq.stream_id = htobe64(stream->id); | |
579 | /* Already in big endian. */ | |
580 | rq.offset = offset; | |
581 | rq.len = htobe32(len); | |
582 | ||
583 | do { | |
584 | ret_len = send(ctx->control_sock, &cmd, sizeof(cmd), 0); | |
585 | } while (ret_len < 0 && errno == EINTR); | |
586 | if (ret_len < 0) { | |
74f97e7d | 587 | perror("[error] Error sending cmd"); |
12a91e9d JD |
588 | ret = ret_len; |
589 | goto error; | |
590 | } | |
591 | assert(ret_len == sizeof(cmd)); | |
592 | ||
593 | do { | |
594 | ret_len = send(ctx->control_sock, &rq, sizeof(rq), 0); | |
595 | } while (ret_len < 0 && errno == EINTR); | |
596 | if (ret_len < 0) { | |
74f97e7d | 597 | perror("[error] Error sending get_data_packet request"); |
12a91e9d JD |
598 | ret = ret_len; |
599 | goto error; | |
600 | } | |
601 | assert(ret_len == sizeof(rq)); | |
602 | ||
603 | do { | |
604 | ret_len = recv(ctx->control_sock, &rp, sizeof(rp), 0); | |
605 | } while (ret_len < 0 && errno == EINTR); | |
74f97e7d JD |
606 | if (ret_len == 0) { |
607 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
608 | ret = -1; | |
609 | goto error; | |
610 | } | |
12a91e9d | 611 | if (ret_len < 0) { |
74f97e7d | 612 | perror("[error] Error receiving data response"); |
12a91e9d JD |
613 | ret = ret_len; |
614 | goto error; | |
615 | } | |
616 | if (ret_len != sizeof(rp)) { | |
617 | fprintf(stderr, "[error] get_data_packet: expected %" PRId64 | |
618 | ", received %" PRId64 "\n", ret_len, | |
619 | sizeof(rp)); | |
620 | ret = -1; | |
621 | goto error; | |
622 | } | |
623 | ||
624 | rp.flags = be32toh(rp.flags); | |
625 | ||
626 | switch (be32toh(rp.status)) { | |
627 | case LTTNG_VIEWER_GET_PACKET_OK: | |
628 | len = be32toh(rp.len); | |
629 | printf_verbose("get_data_packet: Ok, packet size : %" PRIu64 | |
630 | "\n", len); | |
631 | break; | |
632 | case LTTNG_VIEWER_GET_PACKET_RETRY: | |
633 | printf_verbose("get_data_packet: retry\n"); | |
634 | ret = -1; | |
635 | goto end; | |
636 | case LTTNG_VIEWER_GET_PACKET_ERR: | |
637 | if (rp.flags & LTTNG_VIEWER_FLAG_NEW_METADATA) { | |
638 | printf_verbose("get_data_packet: new metadata needed\n"); | |
639 | ret = 0; | |
640 | goto end; | |
641 | } | |
d81179de | 642 | if (rp.flags & LTTNG_VIEWER_FLAG_NEW_STREAM) { |
8fe4d0cf | 643 | printf_verbose("get_data_packet: new streams needed\n"); |
d81179de JD |
644 | ret = ask_new_streams(ctx); |
645 | if (ret < 0) | |
646 | goto error; | |
647 | g_hash_table_foreach(ctx->session->ctf_traces, add_traces, | |
648 | ctx->bt_ctx); | |
8fe4d0cf JD |
649 | ret = 0; |
650 | goto end; | |
d81179de | 651 | } |
12a91e9d JD |
652 | fprintf(stderr, "[error] get_data_packet: error\n"); |
653 | ret = -1; | |
654 | goto end; | |
655 | case LTTNG_VIEWER_GET_PACKET_EOF: | |
656 | ret = -2; | |
657 | goto error; | |
658 | default: | |
659 | printf_verbose("get_data_packet: unknown\n"); | |
660 | assert(0); | |
661 | ret = -1; | |
662 | goto end; | |
663 | } | |
664 | ||
665 | if (len <= 0) { | |
666 | ret = -1; | |
667 | goto end; | |
668 | } | |
669 | ||
670 | if (len > stream->mmap_size) { | |
671 | uint64_t new_size; | |
672 | ||
673 | new_size = max_t(uint64_t, len, stream->mmap_size << 1); | |
674 | if (pos->base_mma) { | |
675 | /* unmap old base */ | |
676 | ret = munmap_align(pos->base_mma); | |
677 | if (ret) { | |
74f97e7d | 678 | perror("[error] Unable to unmap old base"); |
12a91e9d JD |
679 | ret = -1; |
680 | goto error; | |
681 | } | |
682 | pos->base_mma = NULL; | |
683 | } | |
684 | pos->base_mma = mmap_align(new_size, | |
685 | PROT_READ | PROT_WRITE, | |
686 | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); | |
687 | if (pos->base_mma == MAP_FAILED) { | |
74f97e7d | 688 | perror("[error] mmap error"); |
12a91e9d JD |
689 | pos->base_mma = NULL; |
690 | ret = -1; | |
691 | goto error; | |
692 | } | |
693 | ||
694 | stream->mmap_size = new_size; | |
695 | printf_verbose("Expanding stream mmap size to %" PRIu64 " bytes\n", | |
696 | stream->mmap_size); | |
697 | } | |
698 | ||
699 | do { | |
700 | ret_len = recv(ctx->control_sock, | |
701 | mmap_align_addr(pos->base_mma), len, | |
702 | MSG_WAITALL); | |
703 | } while (ret_len < 0 && errno == EINTR); | |
74f97e7d JD |
704 | if (ret_len == 0) { |
705 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
706 | ret = -1; | |
707 | goto error; | |
708 | } | |
12a91e9d | 709 | if (ret_len < 0) { |
74f97e7d | 710 | perror("[error] Error receiving trace packet"); |
12a91e9d JD |
711 | ret = ret_len; |
712 | goto error; | |
713 | } | |
714 | assert(ret_len == len); | |
715 | ||
716 | end: | |
717 | error: | |
718 | return ret; | |
719 | } | |
720 | ||
721 | /* | |
722 | * Return number of metadata bytes written or a negative value on error. | |
723 | */ | |
724 | static | |
725 | int get_new_metadata(struct lttng_live_ctx *ctx, | |
726 | struct lttng_live_viewer_stream *viewer_stream, | |
727 | uint64_t *metadata_len) | |
728 | { | |
729 | uint64_t len = 0; | |
730 | int ret; | |
731 | struct lttng_viewer_cmd cmd; | |
732 | struct lttng_viewer_get_metadata rq; | |
733 | struct lttng_viewer_metadata_packet rp; | |
734 | struct lttng_live_viewer_stream *metadata_stream; | |
735 | char *data = NULL; | |
736 | ssize_t ret_len; | |
737 | ||
738 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_METADATA); | |
739 | cmd.data_size = sizeof(rq); | |
740 | cmd.cmd_version = 0; | |
741 | ||
742 | metadata_stream = viewer_stream->ctf_trace->metadata_stream; | |
743 | rq.stream_id = htobe64(metadata_stream->id); | |
744 | ||
745 | do { | |
746 | ret_len = send(ctx->control_sock, &cmd, sizeof(cmd), 0); | |
747 | } while (ret_len < 0 && errno == EINTR); | |
748 | if (ret_len < 0) { | |
74f97e7d | 749 | perror("[error] Error sending cmd"); |
12a91e9d JD |
750 | ret = ret_len; |
751 | goto error; | |
752 | } | |
753 | assert(ret_len == sizeof(cmd)); | |
754 | ||
755 | do { | |
756 | ret_len = send(ctx->control_sock, &rq, sizeof(rq), 0); | |
757 | } while (ret_len < 0 && errno == EINTR); | |
758 | if (ret_len < 0) { | |
74f97e7d | 759 | perror("[error] Error sending get_metadata request"); |
12a91e9d JD |
760 | ret = ret_len; |
761 | goto error; | |
762 | } | |
763 | assert(ret_len == sizeof(rq)); | |
764 | ||
765 | do { | |
766 | ret_len = recv(ctx->control_sock, &rp, sizeof(rp), 0); | |
767 | } while (ret_len < 0 && errno == EINTR); | |
74f97e7d JD |
768 | if (ret_len == 0) { |
769 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
770 | ret = -1; | |
771 | goto error; | |
772 | } | |
12a91e9d | 773 | if (ret_len < 0) { |
74f97e7d | 774 | perror("[error] Error receiving metadata response"); |
12a91e9d JD |
775 | ret = ret_len; |
776 | goto error; | |
777 | } | |
778 | assert(ret_len == sizeof(rp)); | |
779 | ||
780 | switch (be32toh(rp.status)) { | |
781 | case LTTNG_VIEWER_METADATA_OK: | |
782 | printf_verbose("get_metadata : OK\n"); | |
783 | break; | |
784 | case LTTNG_VIEWER_NO_NEW_METADATA: | |
785 | printf_verbose("get_metadata : NO NEW\n"); | |
786 | ret = -1; | |
787 | goto end; | |
788 | case LTTNG_VIEWER_METADATA_ERR: | |
789 | printf_verbose("get_metadata : ERR\n"); | |
790 | ret = -1; | |
791 | goto end; | |
792 | default: | |
793 | printf_verbose("get_metadata : UNKNOWN\n"); | |
794 | ret = -1; | |
795 | goto end; | |
796 | } | |
797 | ||
798 | len = be64toh(rp.len); | |
799 | printf_verbose("Writing %" PRIu64" bytes to metadata\n", len); | |
800 | if (len <= 0) { | |
801 | ret = -1; | |
802 | goto end; | |
803 | } | |
804 | ||
805 | data = zmalloc(len); | |
806 | if (!data) { | |
807 | perror("relay data zmalloc"); | |
808 | ret = -1; | |
809 | goto error; | |
810 | } | |
811 | do { | |
812 | ret_len = recv(ctx->control_sock, data, len, MSG_WAITALL); | |
813 | } while (ret_len < 0 && errno == EINTR); | |
74f97e7d JD |
814 | if (ret_len == 0) { |
815 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
816 | ret = -1; | |
817 | free(data); | |
818 | goto error; | |
819 | } | |
12a91e9d | 820 | if (ret_len < 0) { |
74f97e7d | 821 | perror("[error] Error receiving trace packet"); |
12a91e9d JD |
822 | ret = ret_len; |
823 | free(data); | |
824 | goto error; | |
825 | } | |
826 | assert(ret_len == len); | |
827 | ||
828 | do { | |
829 | ret_len = write(metadata_stream->fd, data, len); | |
830 | } while (ret_len < 0 && errno == EINTR); | |
831 | if (ret_len < 0) { | |
832 | free(data); | |
833 | ret = ret_len; | |
834 | goto error; | |
835 | } | |
836 | assert(ret_len == len); | |
837 | ||
838 | free(data); | |
839 | ||
840 | *metadata_len = len; | |
841 | ret = 0; | |
842 | end: | |
843 | error: | |
844 | return ret; | |
845 | } | |
846 | ||
847 | /* | |
848 | * Get one index for a stream. | |
849 | * | |
850 | * Returns 0 on success or a negative value on error. | |
851 | */ | |
852 | static | |
853 | int get_next_index(struct lttng_live_ctx *ctx, | |
854 | struct lttng_live_viewer_stream *viewer_stream, | |
855 | struct packet_index *index) | |
856 | { | |
857 | struct lttng_viewer_cmd cmd; | |
858 | struct lttng_viewer_get_next_index rq; | |
859 | struct lttng_viewer_index rp; | |
860 | int ret; | |
861 | uint64_t metadata_len; | |
862 | ssize_t ret_len; | |
863 | ||
864 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_NEXT_INDEX); | |
865 | cmd.data_size = sizeof(rq); | |
866 | cmd.cmd_version = 0; | |
867 | ||
868 | memset(&rq, 0, sizeof(rq)); | |
869 | rq.stream_id = htobe64(viewer_stream->id); | |
870 | ||
871 | retry: | |
872 | do { | |
873 | ret_len = send(ctx->control_sock, &cmd, sizeof(cmd), 0); | |
874 | } while (ret_len < 0 && errno == EINTR); | |
875 | if (ret_len < 0) { | |
74f97e7d | 876 | perror("[error] Error sending cmd"); |
12a91e9d JD |
877 | ret = ret_len; |
878 | goto error; | |
879 | } | |
880 | assert(ret_len == sizeof(cmd)); | |
881 | ||
882 | do { | |
883 | ret_len = send(ctx->control_sock, &rq, sizeof(rq), 0); | |
884 | } while (ret_len < 0 && errno == EINTR); | |
885 | if (ret_len < 0) { | |
74f97e7d | 886 | perror("[error] Error sending get_next_index request"); |
12a91e9d JD |
887 | ret = ret_len; |
888 | goto error; | |
889 | } | |
890 | assert(ret_len == sizeof(rq)); | |
891 | ||
892 | do { | |
893 | ret_len = recv(ctx->control_sock, &rp, sizeof(rp), 0); | |
894 | } while (ret_len < 0 && errno == EINTR); | |
74f97e7d JD |
895 | if (ret_len == 0) { |
896 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
897 | ret = -1; | |
898 | goto error; | |
899 | } | |
12a91e9d | 900 | if (ret_len < 0) { |
74f97e7d | 901 | perror("[error] Error receiving index response"); |
12a91e9d JD |
902 | ret = ret_len; |
903 | goto error; | |
904 | } | |
905 | assert(ret_len == sizeof(rp)); | |
906 | ||
907 | rp.flags = be32toh(rp.flags); | |
908 | ||
909 | switch (be32toh(rp.status)) { | |
910 | case LTTNG_VIEWER_INDEX_INACTIVE: | |
911 | printf_verbose("get_next_index: inactive\n"); | |
912 | memset(index, 0, sizeof(struct packet_index)); | |
3bac1a1f | 913 | index->ts_cycles.timestamp_end = be64toh(rp.timestamp_end); |
12a91e9d JD |
914 | break; |
915 | case LTTNG_VIEWER_INDEX_OK: | |
916 | printf_verbose("get_next_index: Ok, need metadata update : %u\n", | |
917 | rp.flags & LTTNG_VIEWER_FLAG_NEW_METADATA); | |
918 | index->offset = be64toh(rp.offset); | |
919 | index->packet_size = be64toh(rp.packet_size); | |
920 | index->content_size = be64toh(rp.content_size); | |
3bac1a1f JD |
921 | index->ts_cycles.timestamp_begin = be64toh(rp.timestamp_begin); |
922 | index->ts_cycles.timestamp_end = be64toh(rp.timestamp_end); | |
12a91e9d JD |
923 | index->events_discarded = be64toh(rp.events_discarded); |
924 | ||
925 | if (rp.flags & LTTNG_VIEWER_FLAG_NEW_METADATA) { | |
926 | printf_verbose("get_next_index: new metadata needed\n"); | |
927 | ret = get_new_metadata(ctx, viewer_stream, | |
928 | &metadata_len); | |
929 | if (ret < 0) { | |
930 | goto error; | |
931 | } | |
932 | } | |
d81179de JD |
933 | if (rp.flags & LTTNG_VIEWER_FLAG_NEW_STREAM) { |
934 | ret = ask_new_streams(ctx); | |
935 | if (ret < 0) | |
936 | goto error; | |
937 | g_hash_table_foreach(ctx->session->ctf_traces, add_traces, | |
938 | ctx->bt_ctx); | |
939 | } | |
12a91e9d JD |
940 | break; |
941 | case LTTNG_VIEWER_INDEX_RETRY: | |
942 | printf_verbose("get_next_index: retry\n"); | |
71ba9228 | 943 | sleep(0.1); |
12a91e9d JD |
944 | goto retry; |
945 | case LTTNG_VIEWER_INDEX_HUP: | |
946 | printf_verbose("get_next_index: stream hung up\n"); | |
947 | viewer_stream->id = -1ULL; | |
948 | viewer_stream->fd = -1; | |
949 | index->offset = EOF; | |
d81179de | 950 | ctx->session->stream_count--; |
12a91e9d JD |
951 | break; |
952 | case LTTNG_VIEWER_INDEX_ERR: | |
953 | fprintf(stderr, "[error] get_next_index: error\n"); | |
954 | ret = -1; | |
955 | goto error; | |
956 | default: | |
957 | fprintf(stderr, "[error] get_next_index: unkwown value\n"); | |
958 | ret = -1; | |
959 | goto error; | |
960 | } | |
961 | ||
962 | ret = 0; | |
963 | ||
964 | error: | |
965 | return ret; | |
966 | } | |
967 | ||
d81179de | 968 | static |
12a91e9d JD |
969 | void ctf_live_packet_seek(struct bt_stream_pos *stream_pos, size_t index, |
970 | int whence) | |
971 | { | |
972 | struct ctf_stream_pos *pos; | |
973 | struct ctf_file_stream *file_stream; | |
3bac1a1f | 974 | struct packet_index *prev_index = NULL, *cur_index; |
12a91e9d JD |
975 | struct lttng_live_viewer_stream *viewer_stream; |
976 | struct lttng_live_session *session; | |
977 | int ret; | |
978 | ||
979 | retry: | |
980 | pos = ctf_pos(stream_pos); | |
981 | file_stream = container_of(pos, struct ctf_file_stream, pos); | |
982 | viewer_stream = (struct lttng_live_viewer_stream *) pos->priv; | |
983 | session = viewer_stream->session; | |
984 | ||
3bac1a1f JD |
985 | switch (pos->packet_index->len) { |
986 | case 0: | |
987 | g_array_set_size(pos->packet_index, 1); | |
988 | cur_index = &g_array_index(pos->packet_index, | |
989 | struct packet_index, 0); | |
990 | break; | |
991 | case 1: | |
992 | g_array_set_size(pos->packet_index, 2); | |
993 | prev_index = &g_array_index(pos->packet_index, | |
994 | struct packet_index, 0); | |
995 | cur_index = &g_array_index(pos->packet_index, | |
996 | struct packet_index, 1); | |
997 | break; | |
998 | case 2: | |
999 | g_array_index(pos->packet_index, | |
1000 | struct packet_index, 0) = | |
1001 | g_array_index(pos->packet_index, | |
1002 | struct packet_index, 1); | |
1003 | prev_index = &g_array_index(pos->packet_index, | |
1004 | struct packet_index, 0); | |
1005 | cur_index = &g_array_index(pos->packet_index, | |
1006 | struct packet_index, 1); | |
1007 | break; | |
1008 | default: | |
1009 | abort(); | |
1010 | break; | |
1011 | } | |
1012 | ||
12a91e9d | 1013 | printf_verbose("get_next_index for stream %" PRIu64 "\n", viewer_stream->id); |
3bac1a1f | 1014 | ret = get_next_index(session->ctx, viewer_stream, cur_index); |
12a91e9d JD |
1015 | if (ret < 0) { |
1016 | pos->offset = EOF; | |
1017 | fprintf(stderr, "[error] get_next_index failed\n"); | |
1018 | return; | |
1019 | } | |
1020 | ||
3bac1a1f JD |
1021 | pos->packet_size = cur_index->packet_size; |
1022 | pos->content_size = cur_index->content_size; | |
12a91e9d | 1023 | pos->mmap_base_offset = 0; |
3bac1a1f | 1024 | if (cur_index->offset == EOF) { |
12a91e9d JD |
1025 | pos->offset = EOF; |
1026 | } else { | |
1027 | pos->offset = 0; | |
1028 | } | |
1029 | ||
3bac1a1f JD |
1030 | if (cur_index->content_size == 0) { |
1031 | file_stream->parent.cycles_timestamp = | |
1032 | cur_index->ts_cycles.timestamp_end; | |
12a91e9d | 1033 | file_stream->parent.real_timestamp = ctf_get_real_timestamp( |
3bac1a1f JD |
1034 | &file_stream->parent, |
1035 | cur_index->ts_cycles.timestamp_end); | |
12a91e9d | 1036 | } else { |
3bac1a1f JD |
1037 | /* Convert the timestamps and append to the real_index. */ |
1038 | cur_index->ts_real.timestamp_begin = ctf_get_real_timestamp( | |
1039 | &file_stream->parent, | |
1040 | cur_index->ts_cycles.timestamp_begin); | |
1041 | cur_index->ts_real.timestamp_end = ctf_get_real_timestamp( | |
1042 | &file_stream->parent, | |
1043 | cur_index->ts_cycles.timestamp_end); | |
1044 | ||
1045 | ctf_update_current_packet_index(&file_stream->parent, | |
1046 | prev_index, cur_index); | |
1047 | ||
1048 | file_stream->parent.cycles_timestamp = | |
1049 | cur_index->ts_cycles.timestamp_begin; | |
1050 | file_stream->parent.real_timestamp = | |
1051 | cur_index->ts_real.timestamp_begin; | |
12a91e9d JD |
1052 | } |
1053 | ||
1054 | if (pos->packet_size == 0 || pos->offset == EOF) { | |
1055 | goto end; | |
1056 | } | |
1057 | ||
1058 | printf_verbose("get_data_packet for stream %" PRIu64 "\n", | |
1059 | viewer_stream->id); | |
1060 | ret = get_data_packet(session->ctx, pos, viewer_stream, | |
3bac1a1f JD |
1061 | be64toh(cur_index->offset), |
1062 | cur_index->packet_size / CHAR_BIT); | |
12a91e9d JD |
1063 | if (ret == -2) { |
1064 | goto retry; | |
1065 | } else if (ret < 0) { | |
1066 | pos->offset = EOF; | |
1067 | fprintf(stderr, "[error] get_data_packet failed\n"); | |
1068 | return; | |
1069 | } | |
1070 | ||
1071 | printf_verbose("Index received : packet_size : %" PRIu64 | |
1072 | ", offset %" PRIu64 ", content_size %" PRIu64 | |
1073 | ", timestamp_end : %" PRIu64 "\n", | |
3bac1a1f JD |
1074 | cur_index->packet_size, cur_index->offset, |
1075 | cur_index->content_size, | |
1076 | cur_index->ts_cycles.timestamp_end); | |
12a91e9d JD |
1077 | |
1078 | /* update trace_packet_header and stream_packet_context */ | |
1079 | if (pos->prot != PROT_WRITE && file_stream->parent.trace_packet_header) { | |
1080 | /* Read packet header */ | |
1081 | ret = generic_rw(&pos->parent, &file_stream->parent.trace_packet_header->p); | |
1082 | if (ret) { | |
1083 | pos->offset = EOF; | |
1084 | fprintf(stderr, "[error] trace packet header read failed\n"); | |
1085 | goto end; | |
1086 | } | |
1087 | } | |
1088 | if (pos->prot != PROT_WRITE && file_stream->parent.stream_packet_context) { | |
1089 | /* Read packet context */ | |
1090 | ret = generic_rw(&pos->parent, &file_stream->parent.stream_packet_context->p); | |
1091 | if (ret) { | |
1092 | pos->offset = EOF; | |
1093 | fprintf(stderr, "[error] stream packet context read failed\n"); | |
1094 | goto end; | |
1095 | } | |
1096 | } | |
1097 | pos->data_offset = pos->offset; | |
1098 | ||
1099 | end: | |
1100 | return; | |
1101 | } | |
1102 | ||
d81179de JD |
1103 | int lttng_live_create_viewer_session(struct lttng_live_ctx *ctx) |
1104 | { | |
1105 | struct lttng_viewer_cmd cmd; | |
1106 | struct lttng_viewer_create_session_response resp; | |
1107 | int ret; | |
1108 | ssize_t ret_len; | |
1109 | ||
1110 | cmd.cmd = htobe32(LTTNG_VIEWER_CREATE_SESSION); | |
1111 | cmd.data_size = 0; | |
1112 | cmd.cmd_version = 0; | |
1113 | ||
1114 | do { | |
1115 | ret_len = send(ctx->control_sock, &cmd, sizeof(cmd), 0); | |
1116 | } while (ret_len < 0 && errno == EINTR); | |
1117 | if (ret_len < 0) { | |
74f97e7d | 1118 | perror("[error] Error sending cmd"); |
d81179de JD |
1119 | ret = ret_len; |
1120 | goto error; | |
1121 | } | |
1122 | assert(ret_len == sizeof(cmd)); | |
1123 | ||
1124 | do { | |
1125 | ret_len = recv(ctx->control_sock, &resp, sizeof(resp), 0); | |
1126 | } while (ret_len < 0 && errno == EINTR); | |
74f97e7d JD |
1127 | if (ret_len == 0) { |
1128 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
1129 | ret = -1; | |
1130 | goto error; | |
1131 | } | |
d81179de | 1132 | if (ret_len < 0) { |
74f97e7d | 1133 | perror("[error] Error receiving create session reply"); |
d81179de JD |
1134 | ret = ret_len; |
1135 | goto error; | |
1136 | } | |
1137 | assert(ret_len == sizeof(resp)); | |
1138 | ||
1139 | if (be32toh(resp.status) != LTTNG_VIEWER_CREATE_SESSION_OK) { | |
1140 | fprintf(stderr, "[error] Error creating viewer session\n"); | |
1141 | ret = -1; | |
1142 | goto error; | |
1143 | } | |
1144 | ret = 0; | |
1145 | ||
1146 | error: | |
1147 | return ret; | |
1148 | } | |
1149 | ||
1150 | static | |
1151 | int del_traces(gpointer key, gpointer value, gpointer user_data) | |
12a91e9d JD |
1152 | { |
1153 | struct bt_context *bt_ctx = user_data; | |
1154 | struct lttng_live_ctf_trace *trace = value; | |
1155 | int ret; | |
1156 | ||
1157 | ret = bt_context_remove_trace(bt_ctx, trace->trace_id); | |
1158 | if (ret < 0) | |
1159 | fprintf(stderr, "[error] removing trace from context\n"); | |
1160 | ||
1161 | /* remove the key/value pair from the HT. */ | |
1162 | return 1; | |
1163 | } | |
1164 | ||
d81179de JD |
1165 | static |
1166 | void add_traces(gpointer key, gpointer value, gpointer user_data) | |
12a91e9d JD |
1167 | { |
1168 | int i, ret, total_metadata = 0; | |
1169 | uint64_t metadata_len; | |
1170 | struct bt_context *bt_ctx = user_data; | |
1171 | struct lttng_live_ctf_trace *trace = value; | |
1172 | struct lttng_live_viewer_stream *stream; | |
1173 | struct bt_mmap_stream *new_mmap_stream; | |
1174 | struct bt_mmap_stream_list mmap_list; | |
1175 | struct lttng_live_ctx *ctx = NULL; | |
1176 | ||
d81179de JD |
1177 | /* |
1178 | * We don't know how many streams we will receive for a trace, so | |
1179 | * once we are done receiving the traces, we add all the traces | |
1180 | * received to the bt_context. | |
1181 | * We can receive streams during the attach command or the | |
1182 | * get_new_streams, so we have to make sure not to add multiple | |
1183 | * times the same traces. | |
1184 | * If a trace is already in the context, we just skip this function. | |
1185 | */ | |
1186 | if (trace->in_use) | |
1187 | return; | |
1188 | ||
12a91e9d JD |
1189 | BT_INIT_LIST_HEAD(&mmap_list.head); |
1190 | ||
1191 | for (i = 0; i < trace->streams->len; i++) { | |
1192 | stream = g_ptr_array_index(trace->streams, i); | |
1193 | ctx = stream->session->ctx; | |
1194 | ||
1195 | if (!stream->metadata_flag) { | |
1196 | new_mmap_stream = zmalloc(sizeof(struct bt_mmap_stream)); | |
1197 | new_mmap_stream->priv = (void *) stream; | |
1198 | new_mmap_stream->fd = -1; | |
1199 | bt_list_add(&new_mmap_stream->list, &mmap_list.head); | |
1200 | } else { | |
1201 | /* Get all possible metadata before starting */ | |
1202 | do { | |
1203 | ret = get_new_metadata(ctx, stream, | |
1204 | &metadata_len); | |
1205 | if (ret == 0) { | |
1206 | total_metadata += metadata_len; | |
1207 | } | |
1208 | } while (ret == 0 || total_metadata == 0); | |
1209 | trace->metadata_fp = fopen(stream->path, "r"); | |
1210 | } | |
1211 | } | |
1212 | ||
1213 | if (!trace->metadata_fp) { | |
1214 | fprintf(stderr, "[error] No metadata stream opened\n"); | |
1215 | goto end_free; | |
1216 | } | |
1217 | ||
1218 | ret = bt_context_add_trace(bt_ctx, NULL, "ctf", | |
1219 | ctf_live_packet_seek, &mmap_list, trace->metadata_fp); | |
1220 | if (ret < 0) { | |
1221 | fprintf(stderr, "[error] Error adding trace\n"); | |
1222 | goto end_free; | |
1223 | } | |
d81179de JD |
1224 | |
1225 | if (bt_ctx->current_iterator) { | |
1226 | struct bt_trace_descriptor *td; | |
1227 | struct bt_trace_handle *handle; | |
1228 | ||
1229 | handle = (struct bt_trace_handle *) g_hash_table_lookup( | |
1230 | bt_ctx->trace_handles, | |
1231 | (gpointer) (unsigned long) ret); | |
1232 | td = handle->td; | |
1233 | bt_iter_add_trace(bt_ctx->current_iterator, td); | |
1234 | } | |
1235 | ||
12a91e9d | 1236 | trace->trace_id = ret; |
d81179de | 1237 | trace->in_use = 1; |
12a91e9d JD |
1238 | |
1239 | goto end; | |
1240 | ||
1241 | end_free: | |
1242 | bt_context_put(bt_ctx); | |
1243 | end: | |
1244 | return; | |
1245 | } | |
1246 | ||
d81179de | 1247 | int lttng_live_get_new_streams(struct lttng_live_ctx *ctx, uint64_t id) |
12a91e9d | 1248 | { |
d81179de JD |
1249 | struct lttng_viewer_cmd cmd; |
1250 | struct lttng_viewer_new_streams_request rq; | |
1251 | struct lttng_viewer_new_streams_response rp; | |
1252 | struct lttng_viewer_stream stream; | |
1253 | int ret, i; | |
1254 | ssize_t ret_len; | |
1255 | uint32_t stream_count; | |
12a91e9d | 1256 | |
d81179de JD |
1257 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_NEW_STREAMS); |
1258 | cmd.data_size = sizeof(rq); | |
1259 | cmd.cmd_version = 0; | |
1260 | ||
1261 | memset(&rq, 0, sizeof(rq)); | |
1262 | rq.session_id = htobe64(id); | |
1263 | ||
1264 | do { | |
1265 | ret_len = send(ctx->control_sock, &cmd, sizeof(cmd), 0); | |
1266 | } while (ret_len < 0 && errno == EINTR); | |
1267 | if (ret_len < 0) { | |
74f97e7d | 1268 | perror("[error] Error sending cmd"); |
d81179de JD |
1269 | ret = ret_len; |
1270 | goto error; | |
1271 | } | |
1272 | assert(ret_len == sizeof(cmd)); | |
1273 | ||
1274 | do { | |
1275 | ret_len = send(ctx->control_sock, &rq, sizeof(rq), 0); | |
1276 | } while (ret_len < 0 && errno == EINTR); | |
1277 | if (ret_len < 0) { | |
74f97e7d | 1278 | perror("[error] Error sending get_new_streams request"); |
d81179de JD |
1279 | ret = ret_len; |
1280 | goto error; | |
1281 | } | |
1282 | assert(ret_len == sizeof(rq)); | |
1283 | ||
1284 | do { | |
1285 | ret_len = recv(ctx->control_sock, &rp, sizeof(rp), 0); | |
1286 | } while (ret_len < 0 && errno == EINTR); | |
74f97e7d JD |
1287 | if (ret_len == 0) { |
1288 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
1289 | ret = -1; | |
1290 | goto error; | |
1291 | } | |
d81179de | 1292 | if (ret_len < 0) { |
74f97e7d | 1293 | perror("[error] Error receiving get_new_streams response"); |
d81179de JD |
1294 | ret = ret_len; |
1295 | goto error; | |
1296 | } | |
1297 | assert(ret_len == sizeof(rp)); | |
1298 | ||
1299 | switch(be32toh(rp.status)) { | |
1300 | case LTTNG_VIEWER_NEW_STREAMS_OK: | |
1301 | break; | |
1302 | case LTTNG_VIEWER_NEW_STREAMS_NO_NEW: | |
1303 | ret = 0; | |
1304 | goto end; | |
1305 | case LTTNG_VIEWER_NEW_STREAMS_HUP: | |
1306 | ret = -LTTNG_VIEWER_NEW_STREAMS_HUP; | |
1307 | goto end; | |
1308 | case LTTNG_VIEWER_NEW_STREAMS_ERR: | |
1309 | fprintf(stderr, "[error] get_new_streams error\n"); | |
1310 | ret = -1; | |
1311 | goto end; | |
1312 | default: | |
1313 | fprintf(stderr, "[error] Unknown return code %u\n", | |
1314 | be32toh(rp.status)); | |
1315 | ret = -1; | |
12a91e9d JD |
1316 | goto end; |
1317 | } | |
1318 | ||
d81179de JD |
1319 | stream_count = be32toh(rp.streams_count); |
1320 | ctx->session->stream_count += stream_count; | |
12a91e9d | 1321 | /* |
d81179de JD |
1322 | * When the session is created but not started, we do an active wait |
1323 | * until it starts. It allows the viewer to start processing the trace | |
1324 | * as soon as the session starts. | |
12a91e9d | 1325 | */ |
d81179de JD |
1326 | if (ctx->session->stream_count == 0) { |
1327 | ret = 0; | |
1328 | goto end; | |
1329 | } | |
1330 | printf_verbose("Waiting for %" PRIu64 " streams:\n", | |
1331 | ctx->session->stream_count); | |
1332 | ctx->session->streams = g_new0(struct lttng_live_viewer_stream, | |
1333 | ctx->session->stream_count); | |
1334 | for (i = 0; i < stream_count; i++) { | |
12a91e9d | 1335 | do { |
d81179de JD |
1336 | ret_len = recv(ctx->control_sock, &stream, sizeof(stream), 0); |
1337 | } while (ret_len < 0 && errno == EINTR); | |
74f97e7d JD |
1338 | if (ret_len == 0) { |
1339 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
1340 | ret = -1; | |
1341 | goto error; | |
1342 | } | |
d81179de | 1343 | if (ret_len < 0) { |
74f97e7d | 1344 | perror("[error] Error receiving stream"); |
d81179de JD |
1345 | ret = ret_len; |
1346 | goto error; | |
1347 | } | |
1348 | assert(ret_len == sizeof(stream)); | |
1349 | stream.path_name[LTTNG_VIEWER_PATH_MAX - 1] = '\0'; | |
1350 | stream.channel_name[LTTNG_VIEWER_NAME_MAX - 1] = '\0'; | |
1351 | ||
1352 | printf_verbose(" stream %" PRIu64 " : %s/%s\n", | |
1353 | be64toh(stream.id), stream.path_name, | |
1354 | stream.channel_name); | |
1355 | ctx->session->streams[i].id = be64toh(stream.id); | |
1356 | ctx->session->streams[i].session = ctx->session; | |
1357 | ||
1358 | ctx->session->streams[i].first_read = 1; | |
1359 | ctx->session->streams[i].mmap_size = 0; | |
1360 | ||
1361 | if (be32toh(stream.metadata_flag)) { | |
1362 | char *path; | |
1363 | ||
1364 | path = strdup(LTTNG_METADATA_PATH_TEMPLATE); | |
1365 | if (!path) { | |
1366 | perror("strdup"); | |
1367 | ret = -1; | |
1368 | goto error; | |
1369 | } | |
1370 | if (!mkdtemp(path)) { | |
1371 | perror("mkdtemp"); | |
1372 | free(path); | |
1373 | ret = -1; | |
1374 | goto error; | |
1375 | } | |
1376 | ctx->session->streams[i].metadata_flag = 1; | |
1377 | snprintf(ctx->session->streams[i].path, | |
1378 | sizeof(ctx->session->streams[i].path), | |
1379 | "%s/%s", path, | |
1380 | stream.channel_name); | |
1381 | ret = open(ctx->session->streams[i].path, | |
1382 | O_WRONLY | O_CREAT | O_TRUNC, | |
1383 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
12a91e9d | 1384 | if (ret < 0) { |
d81179de JD |
1385 | perror("open"); |
1386 | free(path); | |
1387 | goto error; | |
12a91e9d | 1388 | } |
d81179de JD |
1389 | ctx->session->streams[i].fd = ret; |
1390 | free(path); | |
1391 | } | |
1392 | ret = lttng_live_ctf_trace_assign(&ctx->session->streams[i], | |
1393 | be64toh(stream.ctf_trace_id)); | |
1394 | if (ret < 0) { | |
1395 | goto error; | |
1396 | } | |
1397 | ||
1398 | } | |
1399 | ret = 0; | |
1400 | ||
1401 | end: | |
1402 | error: | |
1403 | return ret; | |
1404 | } | |
12a91e9d | 1405 | |
d81179de JD |
1406 | void lttng_live_read(struct lttng_live_ctx *ctx) |
1407 | { | |
1408 | int ret, i; | |
1409 | #if 0 | |
1410 | struct bt_ctf_iter *iter; | |
1411 | const struct bt_ctf_event *event; | |
1412 | struct bt_iter_pos begin_pos; | |
1413 | struct bt_trace_descriptor *td_write; | |
1414 | struct bt_format *fmt_write; | |
1415 | struct ctf_text_stream_pos *sout; | |
1416 | #endif | |
1417 | uint64_t id; | |
12a91e9d | 1418 | |
d81179de JD |
1419 | ctx->bt_ctx = bt_context_create(); |
1420 | if (!ctx->bt_ctx) { | |
1421 | fprintf(stderr, "[error] bt_context_create allocation\n"); | |
1422 | goto end; | |
1423 | } | |
1424 | ||
1425 | #if 0 | |
1426 | fmt_write = bt_lookup_format(g_quark_from_static_string("text")); | |
1427 | if (!fmt_write) { | |
1428 | fprintf(stderr, "[error] ctf-text error\n"); | |
1429 | goto end; | |
1430 | } | |
1431 | ||
1432 | td_write = fmt_write->open_trace(NULL, O_RDWR, NULL, NULL); | |
1433 | if (!td_write) { | |
1434 | fprintf(stderr, "[error] Error opening output trace\n"); | |
1435 | goto end_free; | |
1436 | } | |
1437 | ||
1438 | sout = container_of(td_write, struct ctf_text_stream_pos, | |
1439 | trace_descriptor); | |
1440 | if (!sout->parent.event_cb) | |
1441 | goto end_free; | |
1442 | #endif | |
1443 | ||
1444 | ret = lttng_live_create_viewer_session(ctx); | |
1445 | if (ret < 0) { | |
1446 | goto end_free; | |
1447 | } | |
1448 | ||
1449 | for (i = 0; i < ctx->session_ids->len; i++) { | |
1450 | id = g_array_index(ctx->session_ids, uint64_t, i); | |
1451 | printf_verbose("Attaching to session %lu\n", id); | |
1452 | ret = lttng_live_attach_session(ctx, id); | |
1453 | printf_verbose("Attaching session returns %d\n", ret); | |
1454 | if (ret < 0) { | |
1455 | if (ret == -LTTNG_VIEWER_ATTACH_UNK) { | |
1456 | fprintf(stderr, "[error] Unknown session ID\n"); | |
1457 | } | |
1458 | goto end_free; | |
1459 | } | |
1460 | } | |
1461 | ||
1462 | /* | |
1463 | * As long as the session is active, we try to get new streams. | |
1464 | */ | |
1465 | #if 0 | |
1466 | for (;;) { | |
1467 | int flags; | |
1468 | #endif | |
1469 | ||
1470 | while (!ctx->session->stream_count) { | |
1471 | if (ctx->session_ids->len == 0) | |
1472 | goto end_free; | |
1473 | ret = ask_new_streams(ctx); | |
1474 | if (ret < 0) | |
1475 | goto end_free; | |
1476 | } | |
1477 | ||
1478 | g_hash_table_foreach(ctx->session->ctf_traces, add_traces, | |
1479 | ctx->bt_ctx); | |
1480 | ||
1481 | #if 0 | |
1482 | begin_pos.type = BT_SEEK_BEGIN; | |
1483 | iter = bt_ctf_iter_create(ctx->bt_ctx, &begin_pos, NULL); | |
1484 | if (!iter) { | |
1485 | fprintf(stderr, "[error] Iterator creation error\n"); | |
1486 | goto end; | |
1487 | } | |
1488 | ||
1489 | for (;;) { | |
1490 | event = bt_ctf_iter_read_event_flags(iter, &flags); | |
1491 | if (!(flags & BT_ITER_FLAG_RETRY)) { | |
1492 | if (!event) { | |
1493 | /* End of trace */ | |
1494 | break; | |
1495 | } | |
1496 | ret = sout->parent.event_cb(&sout->parent, | |
1497 | event->parent->stream); | |
1498 | if (ret) { | |
1499 | fprintf(stderr, "[error] Writing " | |
1500 | "event failed.\n"); | |
1501 | goto end_free; | |
1502 | } | |
1503 | } | |
1504 | ret = bt_iter_next(bt_ctf_get_iter(iter)); | |
1505 | if (ret < 0) { | |
1506 | goto end_free; | |
1507 | } | |
1508 | } | |
1509 | bt_ctf_iter_destroy(iter); | |
1510 | #endif | |
1511 | ret = check_requirements(ctx->bt_ctx); | |
8fe4d0cf | 1512 | if (ret < 0 && !valid_trace) { |
12a91e9d JD |
1513 | fprintf(stderr, "[error] some mandatory contexts " |
1514 | "were missing, exiting.\n"); | |
1515 | goto end; | |
1516 | } | |
1517 | ||
1518 | if (!opt_textdump) { | |
ec016cb4 | 1519 | #ifdef HAVE_LIBNCURSES |
12a91e9d JD |
1520 | pthread_create(&display_thread, NULL, ncurses_display, |
1521 | (void *) NULL); | |
1522 | pthread_create(&timer_thread, NULL, refresh_thread, | |
1523 | (void *) NULL); | |
ec016cb4 JD |
1524 | #else |
1525 | printf("Ncurses support not compiled, please install " | |
1526 | "the missing dependencies and recompile\n"); | |
1527 | goto end_free; | |
1528 | #endif | |
12a91e9d | 1529 | } |
d81179de JD |
1530 | iter_trace(ctx->bt_ctx); |
1531 | g_hash_table_foreach_remove(ctx->session->ctf_traces, | |
1532 | del_traces, ctx->bt_ctx); | |
1533 | ctx->session->stream_count = 0; | |
1534 | #if 0 | |
1535 | } | |
1536 | #endif | |
12a91e9d JD |
1537 | |
1538 | end_free: | |
d81179de | 1539 | bt_context_put(ctx->bt_ctx); |
12a91e9d JD |
1540 | end: |
1541 | return; | |
1542 | } |