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 | ||
c98627ca | 52 | #include "lttng-live.h" |
158eea6e | 53 | #include "lttng-viewer-abi.h" |
4a744367 JD |
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 | ||
b5a1fa45 JD |
65 | static void ctf_live_packet_seek(struct bt_stream_pos *stream_pos, |
66 | size_t index, int whence); | |
2acdc547 JD |
67 | static void add_traces(gpointer key, gpointer value, gpointer user_data); |
68 | static int del_traces(gpointer key, gpointer value, gpointer user_data); | |
69 | ||
b5a1fa45 | 70 | int lttng_live_connect_viewer(struct lttng_live_ctx *ctx) |
4a744367 JD |
71 | { |
72 | struct hostent *host; | |
73 | struct sockaddr_in server_addr; | |
74 | int ret; | |
75 | ||
b5a1fa45 | 76 | host = gethostbyname(ctx->relay_hostname); |
4a744367 JD |
77 | if (!host) { |
78 | ret = -1; | |
79 | goto end; | |
80 | } | |
81 | ||
82 | if ((ctx->control_sock = socket(AF_INET, SOCK_STREAM, 0)) == -1) { | |
83 | perror("Socket"); | |
84 | ret = -1; | |
85 | goto end; | |
86 | } | |
87 | ||
88 | server_addr.sin_family = AF_INET; | |
b5a1fa45 | 89 | server_addr.sin_port = htons(ctx->port); |
4a744367 JD |
90 | server_addr.sin_addr = *((struct in_addr *) host->h_addr); |
91 | bzero(&(server_addr.sin_zero), 8); | |
92 | ||
93 | if (connect(ctx->control_sock, (struct sockaddr *) &server_addr, | |
94 | sizeof(struct sockaddr)) == -1) { | |
95 | perror("Connect"); | |
96 | ret = -1; | |
97 | goto end; | |
98 | } | |
99 | ||
100 | ret = 0; | |
101 | ||
102 | end: | |
103 | return ret; | |
104 | } | |
105 | ||
106 | int lttng_live_establish_connection(struct lttng_live_ctx *ctx) | |
107 | { | |
108 | struct lttng_viewer_cmd cmd; | |
109 | struct lttng_viewer_connect connect; | |
110 | int ret; | |
111 | ssize_t ret_len; | |
112 | ||
113 | cmd.cmd = htobe32(LTTNG_VIEWER_CONNECT); | |
114 | cmd.data_size = sizeof(connect); | |
115 | cmd.cmd_version = 0; | |
116 | ||
0c3cd7e1 | 117 | connect.viewer_session_id = -1ULL; /* will be set on recv */ |
4a744367 JD |
118 | connect.major = htobe32(LTTNG_LIVE_MAJOR); |
119 | connect.minor = htobe32(LTTNG_LIVE_MINOR); | |
120 | connect.type = htobe32(LTTNG_VIEWER_CLIENT_COMMAND); | |
121 | ||
122 | do { | |
123 | ret_len = send(ctx->control_sock, &cmd, sizeof(cmd), 0); | |
124 | } while (ret_len < 0 && errno == EINTR); | |
125 | if (ret_len < 0) { | |
79620497 | 126 | perror("[error] Error sending cmd"); |
4a744367 JD |
127 | ret = ret_len; |
128 | goto error; | |
129 | } | |
130 | assert(ret_len == sizeof(cmd)); | |
131 | ||
132 | do { | |
133 | ret_len = send(ctx->control_sock, &connect, sizeof(connect), 0); | |
134 | } while (ret_len < 0 && errno == EINTR); | |
135 | if (ret_len < 0) { | |
79620497 | 136 | perror("[error] Error sending version"); |
4a744367 JD |
137 | ret = ret_len; |
138 | goto error; | |
139 | } | |
140 | assert(ret_len == sizeof(connect)); | |
141 | ||
142 | do { | |
143 | ret_len = recv(ctx->control_sock, &connect, sizeof(connect), 0); | |
144 | } while (ret_len < 0 && errno == EINTR); | |
f8612f31 MD |
145 | if (ret_len == 0) { |
146 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
147 | ret = -1; | |
148 | goto error; | |
149 | } | |
4a744367 | 150 | if (ret_len < 0) { |
79620497 | 151 | perror("[error] Error receiving version"); |
4a744367 JD |
152 | ret = ret_len; |
153 | goto error; | |
154 | } | |
155 | assert(ret_len == sizeof(connect)); | |
156 | ||
157 | printf_verbose("Received viewer session ID : %" PRIu64 "\n", | |
158 | be64toh(connect.viewer_session_id)); | |
159 | printf_verbose("Relayd version : %u.%u\n", be32toh(connect.major), | |
160 | be32toh(connect.minor)); | |
161 | ||
162 | ret = 0; | |
163 | ||
164 | error: | |
165 | return ret; | |
166 | } | |
167 | ||
b5a1fa45 JD |
168 | static |
169 | void free_session_list(GPtrArray *session_list) | |
170 | { | |
171 | int i; | |
172 | struct lttng_live_relay_session *relay_session; | |
173 | ||
174 | for (i = 0; i < session_list->len; i++) { | |
175 | relay_session = g_ptr_array_index(session_list, i); | |
176 | free(relay_session->name); | |
177 | free(relay_session->hostname); | |
178 | } | |
179 | g_ptr_array_free(session_list, TRUE); | |
180 | } | |
181 | ||
182 | static | |
183 | void print_session_list(GPtrArray *session_list, const char *path) | |
184 | { | |
185 | int i; | |
186 | struct lttng_live_relay_session *relay_session; | |
187 | ||
188 | for (i = 0; i < session_list->len; i++) { | |
189 | relay_session = g_ptr_array_index(session_list, i); | |
190 | fprintf(stdout, "%s/host/%s/%s (timer = %u, " | |
191 | "%u stream(s), %u client(s) connected)\n", | |
192 | path, relay_session->hostname, | |
193 | relay_session->name, relay_session->timer, | |
194 | relay_session->streams, relay_session->clients); | |
195 | } | |
196 | } | |
197 | ||
198 | static | |
199 | void update_session_list(GPtrArray *session_list, char *hostname, | |
200 | char *session_name, uint32_t streams, uint32_t clients, | |
201 | uint32_t timer) | |
202 | { | |
203 | int i, found = 0; | |
204 | struct lttng_live_relay_session *relay_session; | |
205 | ||
206 | for (i = 0; i < session_list->len; i++) { | |
207 | relay_session = g_ptr_array_index(session_list, i); | |
208 | if ((strncmp(relay_session->hostname, hostname, NAME_MAX) == 0) && | |
209 | strncmp(relay_session->name, | |
210 | session_name, NAME_MAX) == 0) { | |
211 | relay_session->streams += streams; | |
212 | if (relay_session->clients < clients) | |
213 | relay_session->clients = clients; | |
214 | found = 1; | |
215 | break; | |
216 | } | |
217 | } | |
218 | if (found) | |
219 | return; | |
220 | ||
221 | relay_session = g_new0(struct lttng_live_relay_session, 1); | |
222 | relay_session->hostname = strndup(hostname, NAME_MAX); | |
223 | relay_session->name = strndup(session_name, NAME_MAX); | |
224 | relay_session->clients = clients; | |
225 | relay_session->streams = streams; | |
226 | relay_session->timer = timer; | |
227 | g_ptr_array_add(session_list, relay_session); | |
228 | } | |
229 | ||
4a744367 JD |
230 | int lttng_live_list_sessions(struct lttng_live_ctx *ctx, const char *path) |
231 | { | |
232 | struct lttng_viewer_cmd cmd; | |
233 | struct lttng_viewer_list_sessions list; | |
234 | struct lttng_viewer_session lsession; | |
b5a1fa45 | 235 | int i, ret, sessions_count, print_list = 0; |
4a744367 | 236 | ssize_t ret_len; |
b5a1fa45 JD |
237 | uint64_t session_id; |
238 | GPtrArray *session_list = NULL; | |
239 | ||
240 | if (strlen(ctx->session_name) == 0) { | |
241 | print_list = 1; | |
242 | session_list = g_ptr_array_new(); | |
243 | } | |
4a744367 JD |
244 | |
245 | cmd.cmd = htobe32(LTTNG_VIEWER_LIST_SESSIONS); | |
246 | cmd.data_size = 0; | |
247 | cmd.cmd_version = 0; | |
248 | ||
249 | do { | |
250 | ret_len = send(ctx->control_sock, &cmd, sizeof(cmd), 0); | |
251 | } while (ret_len < 0 && errno == EINTR); | |
252 | if (ret_len < 0) { | |
79620497 | 253 | perror("[error] Error sending cmd"); |
4a744367 JD |
254 | ret = ret_len; |
255 | goto error; | |
256 | } | |
257 | assert(ret_len == sizeof(cmd)); | |
258 | ||
259 | do { | |
260 | ret_len = recv(ctx->control_sock, &list, sizeof(list), 0); | |
261 | } while (ret_len < 0 && errno == EINTR); | |
f8612f31 MD |
262 | if (ret_len == 0) { |
263 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
264 | ret = -1; | |
265 | goto error; | |
266 | } | |
4a744367 | 267 | if (ret_len < 0) { |
79620497 | 268 | perror("[error] Error receiving session list"); |
4a744367 JD |
269 | ret = ret_len; |
270 | goto error; | |
271 | } | |
272 | assert(ret_len == sizeof(list)); | |
273 | ||
274 | sessions_count = be32toh(list.sessions_count); | |
4a744367 JD |
275 | for (i = 0; i < sessions_count; i++) { |
276 | do { | |
277 | ret_len = recv(ctx->control_sock, &lsession, sizeof(lsession), 0); | |
278 | } while (ret_len < 0 && errno == EINTR); | |
f8612f31 MD |
279 | if (ret_len == 0) { |
280 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
281 | ret = -1; | |
282 | goto error; | |
283 | } | |
4a744367 | 284 | if (ret_len < 0) { |
79620497 | 285 | perror("[error] Error receiving session"); |
4a744367 JD |
286 | ret = ret_len; |
287 | goto error; | |
288 | } | |
289 | assert(ret_len == sizeof(lsession)); | |
9ed31e53 MD |
290 | lsession.hostname[LTTNG_VIEWER_HOST_NAME_MAX - 1] = '\0'; |
291 | lsession.session_name[LTTNG_VIEWER_NAME_MAX - 1] = '\0'; | |
b5a1fa45 JD |
292 | session_id = be64toh(lsession.id); |
293 | ||
294 | if (print_list) { | |
295 | update_session_list(session_list, | |
296 | lsession.hostname, | |
297 | lsession.session_name, | |
298 | be32toh(lsession.streams), | |
299 | be32toh(lsession.clients), | |
300 | be32toh(lsession.live_timer)); | |
301 | } else { | |
302 | if ((strncmp(lsession.session_name, ctx->session_name, | |
303 | NAME_MAX) == 0) && (strncmp(lsession.hostname, | |
304 | ctx->traced_hostname, NAME_MAX) == 0)) { | |
305 | printf_verbose("Reading from session %" PRIu64 "\n", | |
306 | session_id); | |
307 | g_array_append_val(ctx->session_ids, | |
308 | session_id); | |
309 | } | |
310 | } | |
311 | } | |
4a744367 | 312 | |
b5a1fa45 JD |
313 | if (print_list) { |
314 | print_session_list(session_list, path); | |
315 | free_session_list(session_list); | |
4a744367 JD |
316 | } |
317 | ||
318 | ret = 0; | |
319 | ||
320 | error: | |
321 | return ret; | |
322 | } | |
323 | ||
324 | int lttng_live_ctf_trace_assign(struct lttng_live_viewer_stream *stream, | |
325 | uint64_t ctf_trace_id) | |
326 | { | |
327 | struct lttng_live_ctf_trace *trace; | |
328 | int ret = 0; | |
329 | ||
330 | trace = g_hash_table_lookup(stream->session->ctf_traces, | |
331 | (gpointer) ctf_trace_id); | |
332 | if (!trace) { | |
333 | trace = g_new0(struct lttng_live_ctf_trace, 1); | |
4a744367 JD |
334 | trace->ctf_trace_id = ctf_trace_id; |
335 | trace->streams = g_ptr_array_new(); | |
336 | g_hash_table_insert(stream->session->ctf_traces, | |
337 | (gpointer) ctf_trace_id, | |
338 | trace); | |
339 | } | |
340 | if (stream->metadata_flag) | |
341 | trace->metadata_stream = stream; | |
342 | ||
343 | stream->ctf_trace = trace; | |
344 | g_ptr_array_add(trace->streams, stream); | |
345 | ||
4a744367 JD |
346 | return ret; |
347 | } | |
348 | ||
349 | int lttng_live_attach_session(struct lttng_live_ctx *ctx, uint64_t id) | |
350 | { | |
351 | struct lttng_viewer_cmd cmd; | |
352 | struct lttng_viewer_attach_session_request rq; | |
353 | struct lttng_viewer_attach_session_response rp; | |
354 | struct lttng_viewer_stream stream; | |
355 | int ret, i; | |
356 | ssize_t ret_len; | |
357 | ||
358 | cmd.cmd = htobe32(LTTNG_VIEWER_ATTACH_SESSION); | |
359 | cmd.data_size = sizeof(rq); | |
360 | cmd.cmd_version = 0; | |
361 | ||
362 | memset(&rq, 0, sizeof(rq)); | |
363 | rq.session_id = htobe64(id); | |
364 | // TODO: add cmd line parameter to select seek beginning | |
365 | // rq.seek = htobe32(LTTNG_VIEWER_SEEK_BEGINNING); | |
366 | rq.seek = htobe32(LTTNG_VIEWER_SEEK_LAST); | |
367 | ||
368 | do { | |
369 | ret_len = send(ctx->control_sock, &cmd, sizeof(cmd), 0); | |
370 | } while (ret_len < 0 && errno == EINTR); | |
371 | if (ret_len < 0) { | |
79620497 | 372 | perror("[error] Error sending cmd"); |
4a744367 JD |
373 | ret = ret_len; |
374 | goto error; | |
375 | } | |
376 | assert(ret_len == sizeof(cmd)); | |
377 | ||
378 | do { | |
379 | ret_len = send(ctx->control_sock, &rq, sizeof(rq), 0); | |
380 | } while (ret_len < 0 && errno == EINTR); | |
381 | if (ret_len < 0) { | |
79620497 | 382 | perror("[error] Error sending attach request"); |
4a744367 JD |
383 | ret = ret_len; |
384 | goto error; | |
385 | } | |
386 | assert(ret_len == sizeof(rq)); | |
387 | ||
388 | do { | |
389 | ret_len = recv(ctx->control_sock, &rp, sizeof(rp), 0); | |
390 | } while (ret_len < 0 && errno == EINTR); | |
f8612f31 MD |
391 | if (ret_len == 0) { |
392 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
393 | ret = -1; | |
394 | goto error; | |
395 | } | |
4a744367 | 396 | if (ret_len < 0) { |
79620497 | 397 | perror("[error] Error receiving attach response"); |
4a744367 JD |
398 | ret = ret_len; |
399 | goto error; | |
400 | } | |
401 | assert(ret_len == sizeof(rp)); | |
402 | ||
403 | switch(be32toh(rp.status)) { | |
404 | case LTTNG_VIEWER_ATTACH_OK: | |
405 | break; | |
406 | case LTTNG_VIEWER_ATTACH_UNK: | |
407 | ret = -LTTNG_VIEWER_ATTACH_UNK; | |
408 | goto end; | |
409 | case LTTNG_VIEWER_ATTACH_ALREADY: | |
79620497 | 410 | fprintf(stderr, "[error] There is already a viewer attached to this session\n"); |
4a744367 JD |
411 | ret = -1; |
412 | goto end; | |
413 | case LTTNG_VIEWER_ATTACH_NOT_LIVE: | |
414 | fprintf(stderr, "[error] Not a live session\n"); | |
415 | ret = -1; | |
416 | goto end; | |
417 | case LTTNG_VIEWER_ATTACH_SEEK_ERR: | |
418 | fprintf(stderr, "[error] Wrong seek parameter\n"); | |
419 | ret = -1; | |
420 | goto end; | |
421 | default: | |
422 | fprintf(stderr, "[error] Unknown attach return code %u\n", | |
423 | be32toh(rp.status)); | |
424 | ret = -1; | |
425 | goto end; | |
426 | } | |
427 | if (be32toh(rp.status) != LTTNG_VIEWER_ATTACH_OK) { | |
428 | ret = -1; | |
429 | goto end; | |
430 | } | |
431 | ||
2acdc547 | 432 | ctx->session->stream_count += be32toh(rp.streams_count); |
4a744367 JD |
433 | /* |
434 | * When the session is created but not started, we do an active wait | |
435 | * until it starts. It allows the viewer to start processing the trace | |
436 | * as soon as the session starts. | |
437 | */ | |
438 | if (ctx->session->stream_count == 0) { | |
439 | ret = 0; | |
440 | goto end; | |
441 | } | |
442 | printf_verbose("Waiting for %" PRIu64 " streams:\n", | |
443 | ctx->session->stream_count); | |
444 | ctx->session->streams = g_new0(struct lttng_live_viewer_stream, | |
445 | ctx->session->stream_count); | |
4a744367 JD |
446 | for (i = 0; i < be32toh(rp.streams_count); i++) { |
447 | do { | |
448 | ret_len = recv(ctx->control_sock, &stream, sizeof(stream), 0); | |
449 | } while (ret_len < 0 && errno == EINTR); | |
f8612f31 MD |
450 | if (ret_len == 0) { |
451 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
452 | ret = -1; | |
453 | goto error; | |
454 | } | |
4a744367 | 455 | if (ret_len < 0) { |
79620497 | 456 | perror("[error] Error receiving stream"); |
4a744367 JD |
457 | ret = ret_len; |
458 | goto error; | |
459 | } | |
460 | assert(ret_len == sizeof(stream)); | |
9ed31e53 MD |
461 | stream.path_name[LTTNG_VIEWER_PATH_MAX - 1] = '\0'; |
462 | stream.channel_name[LTTNG_VIEWER_NAME_MAX - 1] = '\0'; | |
4a744367 JD |
463 | |
464 | printf_verbose(" stream %" PRIu64 " : %s/%s\n", | |
465 | be64toh(stream.id), stream.path_name, | |
466 | stream.channel_name); | |
467 | ctx->session->streams[i].id = be64toh(stream.id); | |
468 | ctx->session->streams[i].session = ctx->session; | |
469 | ||
470 | ctx->session->streams[i].first_read = 1; | |
471 | ctx->session->streams[i].mmap_size = 0; | |
472 | ||
473 | if (be32toh(stream.metadata_flag)) { | |
474 | char *path; | |
475 | ||
476 | path = strdup(LTTNG_METADATA_PATH_TEMPLATE); | |
6a4d2b5a MD |
477 | if (!path) { |
478 | perror("strdup"); | |
479 | ret = -1; | |
480 | goto error; | |
481 | } | |
482 | if (!mkdtemp(path)) { | |
483 | perror("mkdtemp"); | |
484 | free(path); | |
485 | ret = -1; | |
486 | goto error; | |
487 | } | |
4a744367 | 488 | ctx->session->streams[i].metadata_flag = 1; |
4a744367 JD |
489 | snprintf(ctx->session->streams[i].path, |
490 | sizeof(ctx->session->streams[i].path), | |
491 | "%s/%s", path, | |
492 | stream.channel_name); | |
493 | ret = open(ctx->session->streams[i].path, | |
494 | O_WRONLY | O_CREAT | O_TRUNC, | |
495 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
496 | if (ret < 0) { | |
ab9d07f0 | 497 | perror("open"); |
6a4d2b5a | 498 | free(path); |
4a744367 JD |
499 | goto error; |
500 | } | |
501 | ctx->session->streams[i].fd = ret; | |
6a4d2b5a | 502 | free(path); |
4a744367 JD |
503 | } |
504 | ret = lttng_live_ctf_trace_assign(&ctx->session->streams[i], | |
505 | be64toh(stream.ctf_trace_id)); | |
506 | if (ret < 0) { | |
507 | goto error; | |
508 | } | |
509 | ||
510 | } | |
511 | ret = 0; | |
512 | ||
513 | end: | |
514 | error: | |
515 | return ret; | |
516 | } | |
517 | ||
2acdc547 JD |
518 | static |
519 | int ask_new_streams(struct lttng_live_ctx *ctx) | |
520 | { | |
521 | int i, ret = 0; | |
522 | uint64_t id; | |
523 | ||
524 | restart: | |
525 | for (i = 0; i < ctx->session_ids->len; i++) { | |
526 | id = g_array_index(ctx->session_ids, uint64_t, i); | |
527 | ret = lttng_live_get_new_streams(ctx, id); | |
528 | printf_verbose("Asking for new streams returns %d\n", | |
529 | ret); | |
530 | if (ret < 0) { | |
531 | if (ret == -LTTNG_VIEWER_NEW_STREAMS_HUP) { | |
532 | printf_verbose("Session %" PRIu64 " closed\n", | |
533 | id); | |
b5a1fa45 JD |
534 | /* |
535 | * The streams have already been closed during | |
536 | * the reading, so we only need to get rid of | |
537 | * the trace in our internal table of sessions. | |
538 | */ | |
2acdc547 JD |
539 | g_array_remove_index(ctx->session_ids, i); |
540 | /* | |
541 | * We can't continue iterating on the g_array | |
542 | * after a remove, we have to start again. | |
543 | */ | |
544 | goto restart; | |
545 | } else { | |
546 | ret = -1; | |
547 | goto end; | |
548 | } | |
549 | } | |
550 | } | |
551 | ||
552 | end: | |
553 | return ret; | |
554 | } | |
555 | ||
4a744367 JD |
556 | static |
557 | int get_data_packet(struct lttng_live_ctx *ctx, | |
558 | struct ctf_stream_pos *pos, | |
559 | struct lttng_live_viewer_stream *stream, uint64_t offset, | |
560 | uint64_t len) | |
561 | { | |
562 | struct lttng_viewer_cmd cmd; | |
563 | struct lttng_viewer_get_packet rq; | |
564 | struct lttng_viewer_trace_packet rp; | |
565 | ssize_t ret_len; | |
566 | int ret; | |
567 | ||
568 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_PACKET); | |
569 | cmd.data_size = sizeof(rq); | |
570 | cmd.cmd_version = 0; | |
571 | ||
572 | memset(&rq, 0, sizeof(rq)); | |
573 | rq.stream_id = htobe64(stream->id); | |
574 | /* Already in big endian. */ | |
575 | rq.offset = offset; | |
576 | rq.len = htobe32(len); | |
577 | ||
578 | do { | |
579 | ret_len = send(ctx->control_sock, &cmd, sizeof(cmd), 0); | |
580 | } while (ret_len < 0 && errno == EINTR); | |
581 | if (ret_len < 0) { | |
79620497 | 582 | perror("[error] Error sending cmd"); |
4a744367 JD |
583 | ret = ret_len; |
584 | goto error; | |
585 | } | |
586 | assert(ret_len == sizeof(cmd)); | |
587 | ||
588 | do { | |
589 | ret_len = send(ctx->control_sock, &rq, sizeof(rq), 0); | |
590 | } while (ret_len < 0 && errno == EINTR); | |
591 | if (ret_len < 0) { | |
79620497 | 592 | perror("[error] Error sending get_data_packet request"); |
4a744367 JD |
593 | ret = ret_len; |
594 | goto error; | |
595 | } | |
596 | assert(ret_len == sizeof(rq)); | |
597 | ||
598 | do { | |
599 | ret_len = recv(ctx->control_sock, &rp, sizeof(rp), 0); | |
600 | } while (ret_len < 0 && errno == EINTR); | |
f8612f31 MD |
601 | if (ret_len == 0) { |
602 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
603 | ret = -1; | |
604 | goto error; | |
605 | } | |
4a744367 | 606 | if (ret_len < 0) { |
79620497 | 607 | perror("[error] Error receiving data response"); |
4a744367 JD |
608 | ret = ret_len; |
609 | goto error; | |
610 | } | |
57b9d843 JD |
611 | if (ret_len != sizeof(rp)) { |
612 | fprintf(stderr, "[error] get_data_packet: expected %" PRId64 | |
613 | ", received %" PRId64 "\n", ret_len, | |
614 | sizeof(rp)); | |
615 | ret = -1; | |
616 | goto error; | |
617 | } | |
4a744367 JD |
618 | |
619 | rp.flags = be32toh(rp.flags); | |
620 | ||
621 | switch (be32toh(rp.status)) { | |
622 | case LTTNG_VIEWER_GET_PACKET_OK: | |
623 | len = be32toh(rp.len); | |
624 | printf_verbose("get_data_packet: Ok, packet size : %" PRIu64 | |
625 | "\n", len); | |
626 | break; | |
627 | case LTTNG_VIEWER_GET_PACKET_RETRY: | |
628 | printf_verbose("get_data_packet: retry\n"); | |
629 | ret = -1; | |
630 | goto end; | |
631 | case LTTNG_VIEWER_GET_PACKET_ERR: | |
632 | if (rp.flags & LTTNG_VIEWER_FLAG_NEW_METADATA) { | |
633 | printf_verbose("get_data_packet: new metadata needed\n"); | |
634 | ret = 0; | |
635 | goto end; | |
636 | } | |
2acdc547 JD |
637 | if (rp.flags & LTTNG_VIEWER_FLAG_NEW_STREAM) { |
638 | ret = ask_new_streams(ctx); | |
639 | if (ret < 0) | |
640 | goto error; | |
641 | g_hash_table_foreach(ctx->session->ctf_traces, add_traces, | |
642 | ctx->bt_ctx); | |
643 | } | |
4a744367 JD |
644 | fprintf(stderr, "[error] get_data_packet: error\n"); |
645 | ret = -1; | |
646 | goto end; | |
647 | case LTTNG_VIEWER_GET_PACKET_EOF: | |
648 | ret = -2; | |
649 | goto error; | |
650 | default: | |
651 | printf_verbose("get_data_packet: unknown\n"); | |
652 | assert(0); | |
653 | ret = -1; | |
654 | goto end; | |
655 | } | |
656 | ||
657 | if (len <= 0) { | |
658 | ret = -1; | |
659 | goto end; | |
660 | } | |
661 | ||
662 | if (len > stream->mmap_size) { | |
663 | uint64_t new_size; | |
664 | ||
665 | new_size = max_t(uint64_t, len, stream->mmap_size << 1); | |
666 | if (pos->base_mma) { | |
667 | /* unmap old base */ | |
668 | ret = munmap_align(pos->base_mma); | |
669 | if (ret) { | |
79620497 | 670 | perror("[error] Unable to unmap old base"); |
4a744367 JD |
671 | ret = -1; |
672 | goto error; | |
673 | } | |
674 | pos->base_mma = NULL; | |
675 | } | |
676 | pos->base_mma = mmap_align(new_size, | |
677 | PROT_READ | PROT_WRITE, | |
678 | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); | |
679 | if (pos->base_mma == MAP_FAILED) { | |
79620497 | 680 | perror("[error] mmap error"); |
4a744367 JD |
681 | pos->base_mma = NULL; |
682 | ret = -1; | |
683 | goto error; | |
684 | } | |
685 | ||
686 | stream->mmap_size = new_size; | |
687 | printf_verbose("Expanding stream mmap size to %" PRIu64 " bytes\n", | |
688 | stream->mmap_size); | |
689 | } | |
690 | ||
691 | do { | |
692 | ret_len = recv(ctx->control_sock, | |
693 | mmap_align_addr(pos->base_mma), len, | |
694 | MSG_WAITALL); | |
695 | } while (ret_len < 0 && errno == EINTR); | |
f8612f31 MD |
696 | if (ret_len == 0) { |
697 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
698 | ret = -1; | |
699 | goto error; | |
700 | } | |
4a744367 | 701 | if (ret_len < 0) { |
79620497 | 702 | perror("[error] Error receiving trace packet"); |
4a744367 JD |
703 | ret = ret_len; |
704 | goto error; | |
705 | } | |
706 | assert(ret_len == len); | |
707 | ||
708 | end: | |
709 | error: | |
710 | return ret; | |
711 | } | |
712 | ||
b212be1d MD |
713 | /* |
714 | * Return number of metadata bytes written or a negative value on error. | |
715 | */ | |
4a744367 | 716 | static |
b212be1d MD |
717 | int get_new_metadata(struct lttng_live_ctx *ctx, |
718 | struct lttng_live_viewer_stream *viewer_stream, | |
719 | uint64_t *metadata_len) | |
4a744367 JD |
720 | { |
721 | uint64_t len = 0; | |
722 | int ret; | |
723 | struct lttng_viewer_cmd cmd; | |
724 | struct lttng_viewer_get_metadata rq; | |
725 | struct lttng_viewer_metadata_packet rp; | |
b212be1d | 726 | struct lttng_live_viewer_stream *metadata_stream; |
4a744367 JD |
727 | char *data = NULL; |
728 | ssize_t ret_len; | |
729 | ||
730 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_METADATA); | |
731 | cmd.data_size = sizeof(rq); | |
732 | cmd.cmd_version = 0; | |
733 | ||
b212be1d MD |
734 | metadata_stream = viewer_stream->ctf_trace->metadata_stream; |
735 | rq.stream_id = htobe64(metadata_stream->id); | |
736 | ||
4a744367 JD |
737 | do { |
738 | ret_len = send(ctx->control_sock, &cmd, sizeof(cmd), 0); | |
739 | } while (ret_len < 0 && errno == EINTR); | |
740 | if (ret_len < 0) { | |
79620497 | 741 | perror("[error] Error sending cmd"); |
4a744367 JD |
742 | ret = ret_len; |
743 | goto error; | |
744 | } | |
745 | assert(ret_len == sizeof(cmd)); | |
746 | ||
747 | do { | |
748 | ret_len = send(ctx->control_sock, &rq, sizeof(rq), 0); | |
749 | } while (ret_len < 0 && errno == EINTR); | |
750 | if (ret_len < 0) { | |
79620497 | 751 | perror("[error] Error sending get_metadata request"); |
4a744367 JD |
752 | ret = ret_len; |
753 | goto error; | |
754 | } | |
755 | assert(ret_len == sizeof(rq)); | |
756 | ||
757 | do { | |
758 | ret_len = recv(ctx->control_sock, &rp, sizeof(rp), 0); | |
759 | } while (ret_len < 0 && errno == EINTR); | |
f8612f31 MD |
760 | if (ret_len == 0) { |
761 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
762 | ret = -1; | |
763 | goto error; | |
764 | } | |
4a744367 | 765 | if (ret_len < 0) { |
79620497 | 766 | perror("[error] Error receiving metadata response"); |
4a744367 JD |
767 | ret = ret_len; |
768 | goto error; | |
769 | } | |
770 | assert(ret_len == sizeof(rp)); | |
771 | ||
772 | switch (be32toh(rp.status)) { | |
773 | case LTTNG_VIEWER_METADATA_OK: | |
774 | printf_verbose("get_metadata : OK\n"); | |
775 | break; | |
776 | case LTTNG_VIEWER_NO_NEW_METADATA: | |
777 | printf_verbose("get_metadata : NO NEW\n"); | |
b212be1d | 778 | ret = -1; |
4a744367 JD |
779 | goto end; |
780 | case LTTNG_VIEWER_METADATA_ERR: | |
781 | printf_verbose("get_metadata : ERR\n"); | |
782 | ret = -1; | |
783 | goto end; | |
784 | default: | |
785 | printf_verbose("get_metadata : UNKNOWN\n"); | |
786 | ret = -1; | |
787 | goto end; | |
788 | } | |
789 | ||
790 | len = be64toh(rp.len); | |
791 | printf_verbose("Writing %" PRIu64" bytes to metadata\n", len); | |
792 | if (len <= 0) { | |
793 | ret = -1; | |
794 | goto end; | |
795 | } | |
796 | ||
797 | data = zmalloc(len); | |
798 | if (!data) { | |
799 | perror("relay data zmalloc"); | |
800 | ret = -1; | |
801 | goto error; | |
802 | } | |
803 | do { | |
804 | ret_len = recv(ctx->control_sock, data, len, MSG_WAITALL); | |
805 | } while (ret_len < 0 && errno == EINTR); | |
f8612f31 MD |
806 | if (ret_len == 0) { |
807 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
808 | ret = -1; | |
809 | free(data); | |
810 | goto error; | |
811 | } | |
4a744367 | 812 | if (ret_len < 0) { |
79620497 | 813 | perror("[error] Error receiving trace packet"); |
4a744367 JD |
814 | ret = ret_len; |
815 | free(data); | |
816 | goto error; | |
817 | } | |
818 | assert(ret_len == len); | |
819 | ||
820 | do { | |
821 | ret_len = write(metadata_stream->fd, data, len); | |
822 | } while (ret_len < 0 && errno == EINTR); | |
823 | if (ret_len < 0) { | |
824 | free(data); | |
825 | ret = ret_len; | |
826 | goto error; | |
827 | } | |
828 | assert(ret_len == len); | |
829 | ||
830 | free(data); | |
831 | ||
b212be1d MD |
832 | *metadata_len = len; |
833 | ret = 0; | |
4a744367 JD |
834 | end: |
835 | error: | |
836 | return ret; | |
837 | } | |
838 | ||
839 | /* | |
840 | * Get one index for a stream. | |
841 | * | |
842 | * Returns 0 on success or a negative value on error. | |
843 | */ | |
844 | static | |
845 | int get_next_index(struct lttng_live_ctx *ctx, | |
846 | struct lttng_live_viewer_stream *viewer_stream, | |
847 | struct packet_index *index) | |
848 | { | |
849 | struct lttng_viewer_cmd cmd; | |
850 | struct lttng_viewer_get_next_index rq; | |
851 | struct lttng_viewer_index rp; | |
852 | int ret; | |
b212be1d | 853 | uint64_t metadata_len; |
4a744367 JD |
854 | ssize_t ret_len; |
855 | ||
856 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_NEXT_INDEX); | |
857 | cmd.data_size = sizeof(rq); | |
858 | cmd.cmd_version = 0; | |
859 | ||
860 | memset(&rq, 0, sizeof(rq)); | |
861 | rq.stream_id = htobe64(viewer_stream->id); | |
862 | ||
863 | retry: | |
864 | do { | |
865 | ret_len = send(ctx->control_sock, &cmd, sizeof(cmd), 0); | |
866 | } while (ret_len < 0 && errno == EINTR); | |
867 | if (ret_len < 0) { | |
79620497 | 868 | perror("[error] Error sending cmd"); |
4a744367 JD |
869 | ret = ret_len; |
870 | goto error; | |
871 | } | |
872 | assert(ret_len == sizeof(cmd)); | |
873 | ||
874 | do { | |
875 | ret_len = send(ctx->control_sock, &rq, sizeof(rq), 0); | |
876 | } while (ret_len < 0 && errno == EINTR); | |
877 | if (ret_len < 0) { | |
79620497 | 878 | perror("[error] Error sending get_next_index request"); |
4a744367 JD |
879 | ret = ret_len; |
880 | goto error; | |
881 | } | |
882 | assert(ret_len == sizeof(rq)); | |
883 | ||
884 | do { | |
885 | ret_len = recv(ctx->control_sock, &rp, sizeof(rp), 0); | |
886 | } while (ret_len < 0 && errno == EINTR); | |
f8612f31 MD |
887 | if (ret_len == 0) { |
888 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
889 | ret = -1; | |
890 | goto error; | |
891 | } | |
4a744367 | 892 | if (ret_len < 0) { |
79620497 | 893 | perror("[error] Error receiving index response"); |
4a744367 JD |
894 | ret = ret_len; |
895 | goto error; | |
896 | } | |
897 | assert(ret_len == sizeof(rp)); | |
898 | ||
899 | rp.flags = be32toh(rp.flags); | |
900 | ||
901 | switch (be32toh(rp.status)) { | |
902 | case LTTNG_VIEWER_INDEX_INACTIVE: | |
903 | printf_verbose("get_next_index: inactive\n"); | |
904 | memset(index, 0, sizeof(struct packet_index)); | |
992e8cc0 | 905 | index->ts_cycles.timestamp_end = be64toh(rp.timestamp_end); |
4a744367 JD |
906 | break; |
907 | case LTTNG_VIEWER_INDEX_OK: | |
908 | printf_verbose("get_next_index: Ok, need metadata update : %u\n", | |
909 | rp.flags & LTTNG_VIEWER_FLAG_NEW_METADATA); | |
910 | index->offset = be64toh(rp.offset); | |
911 | index->packet_size = be64toh(rp.packet_size); | |
912 | index->content_size = be64toh(rp.content_size); | |
992e8cc0 MD |
913 | index->ts_cycles.timestamp_begin = be64toh(rp.timestamp_begin); |
914 | index->ts_cycles.timestamp_end = be64toh(rp.timestamp_end); | |
4a744367 JD |
915 | index->events_discarded = be64toh(rp.events_discarded); |
916 | ||
917 | if (rp.flags & LTTNG_VIEWER_FLAG_NEW_METADATA) { | |
918 | printf_verbose("get_next_index: new metadata needed\n"); | |
b212be1d MD |
919 | ret = get_new_metadata(ctx, viewer_stream, |
920 | &metadata_len); | |
4a744367 JD |
921 | if (ret < 0) { |
922 | goto error; | |
923 | } | |
924 | } | |
2acdc547 JD |
925 | if (rp.flags & LTTNG_VIEWER_FLAG_NEW_STREAM) { |
926 | ret = ask_new_streams(ctx); | |
927 | if (ret < 0) | |
928 | goto error; | |
929 | g_hash_table_foreach(ctx->session->ctf_traces, add_traces, | |
930 | ctx->bt_ctx); | |
931 | } | |
4a744367 JD |
932 | break; |
933 | case LTTNG_VIEWER_INDEX_RETRY: | |
934 | printf_verbose("get_next_index: retry\n"); | |
935 | sleep(1); | |
936 | goto retry; | |
937 | case LTTNG_VIEWER_INDEX_HUP: | |
938 | printf_verbose("get_next_index: stream hung up\n"); | |
939 | viewer_stream->id = -1ULL; | |
940 | viewer_stream->fd = -1; | |
941 | index->offset = EOF; | |
2acdc547 | 942 | ctx->session->stream_count--; |
4a744367 JD |
943 | break; |
944 | case LTTNG_VIEWER_INDEX_ERR: | |
945 | fprintf(stderr, "[error] get_next_index: error\n"); | |
946 | ret = -1; | |
947 | goto error; | |
948 | default: | |
949 | fprintf(stderr, "[error] get_next_index: unkwown value\n"); | |
950 | ret = -1; | |
951 | goto error; | |
952 | } | |
953 | ||
954 | ret = 0; | |
955 | ||
956 | error: | |
957 | return ret; | |
958 | } | |
959 | ||
b5a1fa45 | 960 | static |
4a744367 JD |
961 | void ctf_live_packet_seek(struct bt_stream_pos *stream_pos, size_t index, |
962 | int whence) | |
963 | { | |
964 | struct ctf_stream_pos *pos; | |
965 | struct ctf_file_stream *file_stream; | |
f1f52630 | 966 | struct packet_index *prev_index = NULL, *cur_index; |
4a744367 JD |
967 | struct lttng_live_viewer_stream *viewer_stream; |
968 | struct lttng_live_session *session; | |
969 | int ret; | |
970 | ||
971 | retry: | |
972 | pos = ctf_pos(stream_pos); | |
973 | file_stream = container_of(pos, struct ctf_file_stream, pos); | |
974 | viewer_stream = (struct lttng_live_viewer_stream *) pos->priv; | |
975 | session = viewer_stream->session; | |
976 | ||
f1f52630 MD |
977 | switch (pos->packet_index->len) { |
978 | case 0: | |
979 | g_array_set_size(pos->packet_index, 1); | |
980 | cur_index = &g_array_index(pos->packet_index, | |
981 | struct packet_index, 0); | |
982 | break; | |
983 | case 1: | |
984 | g_array_set_size(pos->packet_index, 2); | |
985 | prev_index = &g_array_index(pos->packet_index, | |
986 | struct packet_index, 0); | |
987 | cur_index = &g_array_index(pos->packet_index, | |
988 | struct packet_index, 1); | |
989 | break; | |
990 | case 2: | |
991 | g_array_index(pos->packet_index, | |
992 | struct packet_index, 0) = | |
993 | g_array_index(pos->packet_index, | |
994 | struct packet_index, 1); | |
995 | prev_index = &g_array_index(pos->packet_index, | |
996 | struct packet_index, 0); | |
997 | cur_index = &g_array_index(pos->packet_index, | |
998 | struct packet_index, 1); | |
999 | break; | |
1000 | default: | |
1001 | abort(); | |
1002 | break; | |
1003 | } | |
4a744367 | 1004 | printf_verbose("get_next_index for stream %" PRIu64 "\n", viewer_stream->id); |
f1f52630 | 1005 | ret = get_next_index(session->ctx, viewer_stream, cur_index); |
4a744367 JD |
1006 | if (ret < 0) { |
1007 | pos->offset = EOF; | |
1008 | fprintf(stderr, "[error] get_next_index failed\n"); | |
1009 | return; | |
1010 | } | |
1011 | ||
f1f52630 MD |
1012 | pos->packet_size = cur_index->packet_size; |
1013 | pos->content_size = cur_index->content_size; | |
4a744367 | 1014 | pos->mmap_base_offset = 0; |
f1f52630 | 1015 | if (cur_index->offset == EOF) { |
4a744367 JD |
1016 | pos->offset = EOF; |
1017 | } else { | |
1018 | pos->offset = 0; | |
1019 | } | |
1020 | ||
f1f52630 MD |
1021 | if (cur_index->content_size == 0) { |
1022 | file_stream->parent.cycles_timestamp = | |
1023 | cur_index->ts_cycles.timestamp_end; | |
4a744367 | 1024 | file_stream->parent.real_timestamp = ctf_get_real_timestamp( |
f1f52630 MD |
1025 | &file_stream->parent, |
1026 | cur_index->ts_cycles.timestamp_end); | |
4a744367 | 1027 | } else { |
f1f52630 MD |
1028 | /* Convert the timestamps and append to the real_index. */ |
1029 | cur_index->ts_real.timestamp_begin = ctf_get_real_timestamp( | |
1030 | &file_stream->parent, | |
1031 | cur_index->ts_cycles.timestamp_begin); | |
1032 | cur_index->ts_real.timestamp_end = ctf_get_real_timestamp( | |
1033 | &file_stream->parent, | |
1034 | cur_index->ts_cycles.timestamp_end); | |
1035 | ||
1036 | ctf_update_current_packet_index(&file_stream->parent, | |
1037 | prev_index, cur_index); | |
1038 | ||
1039 | file_stream->parent.cycles_timestamp = | |
1040 | cur_index->ts_cycles.timestamp_begin; | |
1041 | file_stream->parent.real_timestamp = | |
1042 | cur_index->ts_real.timestamp_begin; | |
4a744367 JD |
1043 | } |
1044 | ||
1045 | if (pos->packet_size == 0 || pos->offset == EOF) { | |
1046 | goto end; | |
1047 | } | |
1048 | ||
1049 | printf_verbose("get_data_packet for stream %" PRIu64 "\n", | |
1050 | viewer_stream->id); | |
1051 | ret = get_data_packet(session->ctx, pos, viewer_stream, | |
f1f52630 MD |
1052 | be64toh(cur_index->offset), |
1053 | cur_index->packet_size / CHAR_BIT); | |
4a744367 JD |
1054 | if (ret == -2) { |
1055 | goto retry; | |
1056 | } else if (ret < 0) { | |
1057 | pos->offset = EOF; | |
1058 | fprintf(stderr, "[error] get_data_packet failed\n"); | |
1059 | return; | |
1060 | } | |
1061 | ||
1062 | printf_verbose("Index received : packet_size : %" PRIu64 | |
1063 | ", offset %" PRIu64 ", content_size %" PRIu64 | |
1064 | ", timestamp_end : %" PRIu64 "\n", | |
f1f52630 MD |
1065 | cur_index->packet_size, cur_index->offset, |
1066 | cur_index->content_size, | |
1067 | cur_index->ts_cycles.timestamp_end); | |
4a744367 JD |
1068 | |
1069 | /* update trace_packet_header and stream_packet_context */ | |
1070 | if (pos->prot != PROT_WRITE && file_stream->parent.trace_packet_header) { | |
1071 | /* Read packet header */ | |
1072 | ret = generic_rw(&pos->parent, &file_stream->parent.trace_packet_header->p); | |
1073 | if (ret) { | |
1074 | pos->offset = EOF; | |
1075 | fprintf(stderr, "[error] trace packet header read failed\n"); | |
1076 | goto end; | |
1077 | } | |
1078 | } | |
1079 | if (pos->prot != PROT_WRITE && file_stream->parent.stream_packet_context) { | |
1080 | /* Read packet context */ | |
1081 | ret = generic_rw(&pos->parent, &file_stream->parent.stream_packet_context->p); | |
1082 | if (ret) { | |
1083 | pos->offset = EOF; | |
1084 | fprintf(stderr, "[error] stream packet context read failed\n"); | |
1085 | goto end; | |
1086 | } | |
1087 | } | |
1088 | pos->data_offset = pos->offset; | |
1089 | ||
1090 | end: | |
1091 | return; | |
1092 | } | |
1093 | ||
2acdc547 JD |
1094 | int lttng_live_create_viewer_session(struct lttng_live_ctx *ctx) |
1095 | { | |
1096 | struct lttng_viewer_cmd cmd; | |
1097 | struct lttng_viewer_create_session_response resp; | |
1098 | int ret; | |
1099 | ssize_t ret_len; | |
1100 | ||
1101 | cmd.cmd = htobe32(LTTNG_VIEWER_CREATE_SESSION); | |
1102 | cmd.data_size = 0; | |
1103 | cmd.cmd_version = 0; | |
1104 | ||
1105 | do { | |
1106 | ret_len = send(ctx->control_sock, &cmd, sizeof(cmd), 0); | |
1107 | } while (ret_len < 0 && errno == EINTR); | |
1108 | if (ret_len < 0) { | |
79620497 | 1109 | perror("[error] Error sending cmd"); |
2acdc547 JD |
1110 | ret = ret_len; |
1111 | goto error; | |
1112 | } | |
1113 | assert(ret_len == sizeof(cmd)); | |
1114 | ||
1115 | do { | |
1116 | ret_len = recv(ctx->control_sock, &resp, sizeof(resp), 0); | |
1117 | } while (ret_len < 0 && errno == EINTR); | |
f8612f31 MD |
1118 | if (ret_len == 0) { |
1119 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
1120 | ret = -1; | |
1121 | goto error; | |
1122 | } | |
2acdc547 | 1123 | if (ret_len < 0) { |
79620497 | 1124 | perror("[error] Error receiving create session reply"); |
2acdc547 JD |
1125 | ret = ret_len; |
1126 | goto error; | |
1127 | } | |
1128 | assert(ret_len == sizeof(resp)); | |
1129 | ||
1130 | if (be32toh(resp.status) != LTTNG_VIEWER_CREATE_SESSION_OK) { | |
1131 | fprintf(stderr, "[error] Error creating viewer session\n"); | |
1132 | ret = -1; | |
1133 | goto error; | |
1134 | } | |
1135 | ret = 0; | |
1136 | ||
1137 | error: | |
1138 | return ret; | |
1139 | } | |
1140 | ||
1141 | static | |
1142 | int del_traces(gpointer key, gpointer value, gpointer user_data) | |
4a744367 JD |
1143 | { |
1144 | struct bt_context *bt_ctx = user_data; | |
1145 | struct lttng_live_ctf_trace *trace = value; | |
1146 | int ret; | |
1147 | ||
1148 | ret = bt_context_remove_trace(bt_ctx, trace->trace_id); | |
1149 | if (ret < 0) | |
1150 | fprintf(stderr, "[error] removing trace from context\n"); | |
1151 | ||
1152 | /* remove the key/value pair from the HT. */ | |
1153 | return 1; | |
1154 | } | |
1155 | ||
2acdc547 JD |
1156 | static |
1157 | void add_traces(gpointer key, gpointer value, gpointer user_data) | |
4a744367 | 1158 | { |
b212be1d MD |
1159 | int i, ret, total_metadata = 0; |
1160 | uint64_t metadata_len; | |
4a744367 JD |
1161 | struct bt_context *bt_ctx = user_data; |
1162 | struct lttng_live_ctf_trace *trace = value; | |
1163 | struct lttng_live_viewer_stream *stream; | |
1164 | struct bt_mmap_stream *new_mmap_stream; | |
1165 | struct bt_mmap_stream_list mmap_list; | |
1166 | struct lttng_live_ctx *ctx = NULL; | |
1167 | ||
b5a1fa45 JD |
1168 | /* |
1169 | * We don't know how many streams we will receive for a trace, so | |
1170 | * once we are done receiving the traces, we add all the traces | |
1171 | * received to the bt_context. | |
1172 | * We can receive streams during the attach command or the | |
1173 | * get_new_streams, so we have to make sure not to add multiple | |
1174 | * times the same traces. | |
1175 | * If a trace is already in the context, we just skip this function. | |
1176 | */ | |
2acdc547 JD |
1177 | if (trace->in_use) |
1178 | return; | |
1179 | ||
4a744367 JD |
1180 | BT_INIT_LIST_HEAD(&mmap_list.head); |
1181 | ||
1182 | for (i = 0; i < trace->streams->len; i++) { | |
1183 | stream = g_ptr_array_index(trace->streams, i); | |
1184 | ctx = stream->session->ctx; | |
1185 | ||
1186 | if (!stream->metadata_flag) { | |
1187 | new_mmap_stream = zmalloc(sizeof(struct bt_mmap_stream)); | |
1188 | new_mmap_stream->priv = (void *) stream; | |
1189 | new_mmap_stream->fd = -1; | |
1190 | bt_list_add(&new_mmap_stream->list, &mmap_list.head); | |
1191 | } else { | |
1192 | /* Get all possible metadata before starting */ | |
b212be1d MD |
1193 | do { |
1194 | ret = get_new_metadata(ctx, stream, | |
1195 | &metadata_len); | |
1196 | if (ret == 0) { | |
1197 | total_metadata += metadata_len; | |
1198 | } | |
1199 | } while (ret == 0 || total_metadata == 0); | |
4a744367 JD |
1200 | trace->metadata_fp = fopen(stream->path, "r"); |
1201 | } | |
1202 | } | |
1203 | ||
1204 | if (!trace->metadata_fp) { | |
1205 | fprintf(stderr, "[error] No metadata stream opened\n"); | |
1206 | goto end_free; | |
1207 | } | |
1208 | ||
1209 | ret = bt_context_add_trace(bt_ctx, NULL, "ctf", | |
1210 | ctf_live_packet_seek, &mmap_list, trace->metadata_fp); | |
1211 | if (ret < 0) { | |
1212 | fprintf(stderr, "[error] Error adding trace\n"); | |
1213 | goto end_free; | |
1214 | } | |
5ce3f408 | 1215 | |
2acdc547 | 1216 | if (bt_ctx->current_iterator) { |
5ce3f408 MD |
1217 | struct bt_trace_descriptor *td; |
1218 | struct bt_trace_handle *handle; | |
1219 | ||
1220 | handle = (struct bt_trace_handle *) g_hash_table_lookup( | |
1221 | bt_ctx->trace_handles, | |
1222 | (gpointer) (unsigned long) ret); | |
1223 | td = handle->td; | |
2acdc547 JD |
1224 | bt_iter_add_trace(bt_ctx->current_iterator, td); |
1225 | } | |
1226 | ||
4a744367 | 1227 | trace->trace_id = ret; |
2acdc547 | 1228 | trace->in_use = 1; |
4a744367 JD |
1229 | |
1230 | goto end; | |
1231 | ||
1232 | end_free: | |
1233 | bt_context_put(bt_ctx); | |
1234 | end: | |
1235 | return; | |
1236 | } | |
1237 | ||
2acdc547 | 1238 | int lttng_live_get_new_streams(struct lttng_live_ctx *ctx, uint64_t id) |
6192b988 JD |
1239 | { |
1240 | struct lttng_viewer_cmd cmd; | |
2acdc547 JD |
1241 | struct lttng_viewer_new_streams_request rq; |
1242 | struct lttng_viewer_new_streams_response rp; | |
1243 | struct lttng_viewer_stream stream; | |
1244 | int ret, i; | |
6192b988 | 1245 | ssize_t ret_len; |
b5a1fa45 | 1246 | uint32_t stream_count; |
6192b988 | 1247 | |
2acdc547 JD |
1248 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_NEW_STREAMS); |
1249 | cmd.data_size = sizeof(rq); | |
6192b988 JD |
1250 | cmd.cmd_version = 0; |
1251 | ||
2acdc547 JD |
1252 | memset(&rq, 0, sizeof(rq)); |
1253 | rq.session_id = htobe64(id); | |
1254 | ||
6192b988 JD |
1255 | do { |
1256 | ret_len = send(ctx->control_sock, &cmd, sizeof(cmd), 0); | |
1257 | } while (ret_len < 0 && errno == EINTR); | |
1258 | if (ret_len < 0) { | |
79620497 | 1259 | perror("[error] Error sending cmd"); |
6192b988 JD |
1260 | ret = ret_len; |
1261 | goto error; | |
1262 | } | |
1263 | assert(ret_len == sizeof(cmd)); | |
1264 | ||
1265 | do { | |
2acdc547 | 1266 | ret_len = send(ctx->control_sock, &rq, sizeof(rq), 0); |
6192b988 JD |
1267 | } while (ret_len < 0 && errno == EINTR); |
1268 | if (ret_len < 0) { | |
79620497 | 1269 | perror("[error] Error sending get_new_streams request"); |
6192b988 JD |
1270 | ret = ret_len; |
1271 | goto error; | |
1272 | } | |
2acdc547 | 1273 | assert(ret_len == sizeof(rq)); |
6192b988 | 1274 | |
2acdc547 JD |
1275 | do { |
1276 | ret_len = recv(ctx->control_sock, &rp, sizeof(rp), 0); | |
1277 | } while (ret_len < 0 && errno == EINTR); | |
f8612f31 MD |
1278 | if (ret_len == 0) { |
1279 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
1280 | ret = -1; | |
1281 | goto error; | |
1282 | } | |
2acdc547 | 1283 | if (ret_len < 0) { |
79620497 | 1284 | perror("[error] Error receiving get_new_streams response"); |
2acdc547 | 1285 | ret = ret_len; |
6192b988 JD |
1286 | goto error; |
1287 | } | |
2acdc547 JD |
1288 | assert(ret_len == sizeof(rp)); |
1289 | ||
1290 | switch(be32toh(rp.status)) { | |
1291 | case LTTNG_VIEWER_NEW_STREAMS_OK: | |
1292 | break; | |
1293 | case LTTNG_VIEWER_NEW_STREAMS_NO_NEW: | |
1294 | ret = 0; | |
1295 | goto end; | |
1296 | case LTTNG_VIEWER_NEW_STREAMS_HUP: | |
1297 | ret = -LTTNG_VIEWER_NEW_STREAMS_HUP; | |
1298 | goto end; | |
1299 | case LTTNG_VIEWER_NEW_STREAMS_ERR: | |
1300 | fprintf(stderr, "[error] get_new_streams error\n"); | |
1301 | ret = -1; | |
1302 | goto end; | |
1303 | default: | |
1304 | fprintf(stderr, "[error] Unknown return code %u\n", | |
1305 | be32toh(rp.status)); | |
1306 | ret = -1; | |
1307 | goto end; | |
1308 | } | |
1309 | ||
b5a1fa45 JD |
1310 | stream_count = be32toh(rp.streams_count); |
1311 | ctx->session->stream_count += stream_count; | |
2acdc547 JD |
1312 | /* |
1313 | * When the session is created but not started, we do an active wait | |
1314 | * until it starts. It allows the viewer to start processing the trace | |
1315 | * as soon as the session starts. | |
1316 | */ | |
1317 | if (ctx->session->stream_count == 0) { | |
1318 | ret = 0; | |
1319 | goto end; | |
1320 | } | |
1321 | printf_verbose("Waiting for %" PRIu64 " streams:\n", | |
1322 | ctx->session->stream_count); | |
1323 | ctx->session->streams = g_new0(struct lttng_live_viewer_stream, | |
1324 | ctx->session->stream_count); | |
b5a1fa45 | 1325 | for (i = 0; i < stream_count; i++) { |
2acdc547 JD |
1326 | do { |
1327 | ret_len = recv(ctx->control_sock, &stream, sizeof(stream), 0); | |
1328 | } while (ret_len < 0 && errno == EINTR); | |
f8612f31 MD |
1329 | if (ret_len == 0) { |
1330 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
1331 | ret = -1; | |
1332 | goto error; | |
1333 | } | |
2acdc547 | 1334 | if (ret_len < 0) { |
79620497 | 1335 | perror("[error] Error receiving stream"); |
2acdc547 JD |
1336 | ret = ret_len; |
1337 | goto error; | |
1338 | } | |
1339 | assert(ret_len == sizeof(stream)); | |
1340 | stream.path_name[LTTNG_VIEWER_PATH_MAX - 1] = '\0'; | |
1341 | stream.channel_name[LTTNG_VIEWER_NAME_MAX - 1] = '\0'; | |
1342 | ||
1343 | printf_verbose(" stream %" PRIu64 " : %s/%s\n", | |
1344 | be64toh(stream.id), stream.path_name, | |
1345 | stream.channel_name); | |
1346 | ctx->session->streams[i].id = be64toh(stream.id); | |
1347 | ctx->session->streams[i].session = ctx->session; | |
1348 | ||
1349 | ctx->session->streams[i].first_read = 1; | |
1350 | ctx->session->streams[i].mmap_size = 0; | |
1351 | ||
1352 | if (be32toh(stream.metadata_flag)) { | |
1353 | char *path; | |
1354 | ||
1355 | path = strdup(LTTNG_METADATA_PATH_TEMPLATE); | |
1356 | if (!path) { | |
1357 | perror("strdup"); | |
1358 | ret = -1; | |
1359 | goto error; | |
1360 | } | |
1361 | if (!mkdtemp(path)) { | |
1362 | perror("mkdtemp"); | |
1363 | free(path); | |
1364 | ret = -1; | |
1365 | goto error; | |
1366 | } | |
1367 | ctx->session->streams[i].metadata_flag = 1; | |
1368 | snprintf(ctx->session->streams[i].path, | |
1369 | sizeof(ctx->session->streams[i].path), | |
1370 | "%s/%s", path, | |
1371 | stream.channel_name); | |
1372 | ret = open(ctx->session->streams[i].path, | |
1373 | O_WRONLY | O_CREAT | O_TRUNC, | |
1374 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
1375 | if (ret < 0) { | |
1376 | perror("open"); | |
1377 | free(path); | |
1378 | goto error; | |
1379 | } | |
1380 | ctx->session->streams[i].fd = ret; | |
1381 | free(path); | |
1382 | } | |
1383 | ret = lttng_live_ctf_trace_assign(&ctx->session->streams[i], | |
1384 | be64toh(stream.ctf_trace_id)); | |
1385 | if (ret < 0) { | |
1386 | goto error; | |
1387 | } | |
1388 | ||
1389 | } | |
6192b988 JD |
1390 | ret = 0; |
1391 | ||
2acdc547 | 1392 | end: |
6192b988 JD |
1393 | error: |
1394 | return ret; | |
1395 | } | |
1396 | ||
2acdc547 | 1397 | void lttng_live_read(struct lttng_live_ctx *ctx) |
4a744367 | 1398 | { |
2acdc547 | 1399 | int ret, i; |
4a744367 JD |
1400 | struct bt_ctf_iter *iter; |
1401 | const struct bt_ctf_event *event; | |
1402 | struct bt_iter_pos begin_pos; | |
1403 | struct bt_trace_descriptor *td_write; | |
1404 | struct bt_format *fmt_write; | |
1405 | struct ctf_text_stream_pos *sout; | |
2acdc547 | 1406 | uint64_t id; |
4a744367 | 1407 | |
2acdc547 JD |
1408 | ctx->bt_ctx = bt_context_create(); |
1409 | if (!ctx->bt_ctx) { | |
4a744367 JD |
1410 | fprintf(stderr, "[error] bt_context_create allocation\n"); |
1411 | goto end; | |
1412 | } | |
1413 | ||
1414 | fmt_write = bt_lookup_format(g_quark_from_static_string("text")); | |
1415 | if (!fmt_write) { | |
1416 | fprintf(stderr, "[error] ctf-text error\n"); | |
1417 | goto end; | |
1418 | } | |
1419 | ||
1420 | td_write = fmt_write->open_trace(NULL, O_RDWR, NULL, NULL); | |
1421 | if (!td_write) { | |
1422 | fprintf(stderr, "[error] Error opening output trace\n"); | |
1423 | goto end_free; | |
1424 | } | |
1425 | ||
1426 | sout = container_of(td_write, struct ctf_text_stream_pos, | |
1427 | trace_descriptor); | |
1428 | if (!sout->parent.event_cb) | |
1429 | goto end_free; | |
1430 | ||
6192b988 JD |
1431 | ret = lttng_live_create_viewer_session(ctx); |
1432 | if (ret < 0) { | |
1433 | goto end_free; | |
1434 | } | |
1435 | ||
2acdc547 JD |
1436 | for (i = 0; i < ctx->session_ids->len; i++) { |
1437 | id = g_array_index(ctx->session_ids, uint64_t, i); | |
1438 | printf_verbose("Attaching to session %lu\n", id); | |
1439 | ret = lttng_live_attach_session(ctx, id); | |
1440 | printf_verbose("Attaching session returns %d\n", ret); | |
1441 | if (ret < 0) { | |
1442 | if (ret == -LTTNG_VIEWER_ATTACH_UNK) { | |
1443 | fprintf(stderr, "[error] Unknown session ID\n"); | |
1444 | } | |
1445 | goto end_free; | |
1446 | } | |
1447 | } | |
1448 | ||
4a744367 | 1449 | /* |
2acdc547 | 1450 | * As long as the session is active, we try to get new streams. |
4a744367 | 1451 | */ |
2acdc547 | 1452 | for (;;) { |
4a744367 JD |
1453 | int flags; |
1454 | ||
2acdc547 JD |
1455 | while (!ctx->session->stream_count) { |
1456 | if (ctx->session_ids->len == 0) | |
4a744367 | 1457 | goto end_free; |
2acdc547 JD |
1458 | ret = ask_new_streams(ctx); |
1459 | if (ret < 0) | |
1460 | goto end_free; | |
1461 | } | |
4a744367 | 1462 | |
2acdc547 JD |
1463 | g_hash_table_foreach(ctx->session->ctf_traces, add_traces, |
1464 | ctx->bt_ctx); | |
4a744367 JD |
1465 | |
1466 | begin_pos.type = BT_SEEK_BEGIN; | |
2acdc547 | 1467 | iter = bt_ctf_iter_create(ctx->bt_ctx, &begin_pos, NULL); |
4a744367 JD |
1468 | if (!iter) { |
1469 | fprintf(stderr, "[error] Iterator creation error\n"); | |
1470 | goto end; | |
1471 | } | |
1472 | for (;;) { | |
1473 | event = bt_ctf_iter_read_event_flags(iter, &flags); | |
1474 | if (!(flags & BT_ITER_FLAG_RETRY)) { | |
1475 | if (!event) { | |
1476 | /* End of trace */ | |
1477 | break; | |
1478 | } | |
1479 | ret = sout->parent.event_cb(&sout->parent, | |
1480 | event->parent->stream); | |
1481 | if (ret) { | |
1482 | fprintf(stderr, "[error] Writing " | |
1483 | "event failed.\n"); | |
1484 | goto end_free; | |
1485 | } | |
1486 | } | |
1487 | ret = bt_iter_next(bt_ctf_get_iter(iter)); | |
1488 | if (ret < 0) { | |
1489 | goto end_free; | |
1490 | } | |
1491 | } | |
1492 | bt_ctf_iter_destroy(iter); | |
2acdc547 JD |
1493 | g_hash_table_foreach_remove(ctx->session->ctf_traces, |
1494 | del_traces, ctx->bt_ctx); | |
1495 | ctx->session->stream_count = 0; | |
1496 | } | |
4a744367 JD |
1497 | |
1498 | end_free: | |
2acdc547 | 1499 | bt_context_put(ctx->bt_ctx); |
4a744367 JD |
1500 | end: |
1501 | return; | |
1502 | } |