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); | |
bb17fa55 JD |
69 | static int get_new_metadata(struct lttng_live_ctx *ctx, |
70 | struct lttng_live_viewer_stream *viewer_stream); | |
2acdc547 | 71 | |
b5a1fa45 | 72 | int lttng_live_connect_viewer(struct lttng_live_ctx *ctx) |
4a744367 JD |
73 | { |
74 | struct hostent *host; | |
75 | struct sockaddr_in server_addr; | |
76 | int ret; | |
77 | ||
b5a1fa45 | 78 | host = gethostbyname(ctx->relay_hostname); |
4a744367 JD |
79 | if (!host) { |
80 | ret = -1; | |
81 | goto end; | |
82 | } | |
83 | ||
84 | if ((ctx->control_sock = socket(AF_INET, SOCK_STREAM, 0)) == -1) { | |
85 | perror("Socket"); | |
86 | ret = -1; | |
87 | goto end; | |
88 | } | |
89 | ||
90 | server_addr.sin_family = AF_INET; | |
b5a1fa45 | 91 | server_addr.sin_port = htons(ctx->port); |
4a744367 JD |
92 | server_addr.sin_addr = *((struct in_addr *) host->h_addr); |
93 | bzero(&(server_addr.sin_zero), 8); | |
94 | ||
95 | if (connect(ctx->control_sock, (struct sockaddr *) &server_addr, | |
96 | sizeof(struct sockaddr)) == -1) { | |
97 | perror("Connect"); | |
98 | ret = -1; | |
99 | goto end; | |
100 | } | |
101 | ||
102 | ret = 0; | |
103 | ||
104 | end: | |
105 | return ret; | |
106 | } | |
107 | ||
108 | int lttng_live_establish_connection(struct lttng_live_ctx *ctx) | |
109 | { | |
110 | struct lttng_viewer_cmd cmd; | |
111 | struct lttng_viewer_connect connect; | |
112 | int ret; | |
113 | ssize_t ret_len; | |
114 | ||
115 | cmd.cmd = htobe32(LTTNG_VIEWER_CONNECT); | |
116 | cmd.data_size = sizeof(connect); | |
117 | cmd.cmd_version = 0; | |
118 | ||
0c3cd7e1 | 119 | connect.viewer_session_id = -1ULL; /* will be set on recv */ |
4a744367 JD |
120 | connect.major = htobe32(LTTNG_LIVE_MAJOR); |
121 | connect.minor = htobe32(LTTNG_LIVE_MINOR); | |
122 | connect.type = htobe32(LTTNG_VIEWER_CLIENT_COMMAND); | |
123 | ||
124 | do { | |
125 | ret_len = send(ctx->control_sock, &cmd, sizeof(cmd), 0); | |
126 | } while (ret_len < 0 && errno == EINTR); | |
127 | if (ret_len < 0) { | |
79620497 | 128 | perror("[error] Error sending cmd"); |
4a744367 JD |
129 | ret = ret_len; |
130 | goto error; | |
131 | } | |
132 | assert(ret_len == sizeof(cmd)); | |
133 | ||
134 | do { | |
135 | ret_len = send(ctx->control_sock, &connect, sizeof(connect), 0); | |
136 | } while (ret_len < 0 && errno == EINTR); | |
137 | if (ret_len < 0) { | |
79620497 | 138 | perror("[error] Error sending version"); |
4a744367 JD |
139 | ret = ret_len; |
140 | goto error; | |
141 | } | |
142 | assert(ret_len == sizeof(connect)); | |
143 | ||
144 | do { | |
145 | ret_len = recv(ctx->control_sock, &connect, sizeof(connect), 0); | |
146 | } while (ret_len < 0 && errno == EINTR); | |
f8612f31 MD |
147 | if (ret_len == 0) { |
148 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
149 | ret = -1; | |
150 | goto error; | |
151 | } | |
4a744367 | 152 | if (ret_len < 0) { |
79620497 | 153 | perror("[error] Error receiving version"); |
4a744367 JD |
154 | ret = ret_len; |
155 | goto error; | |
156 | } | |
157 | assert(ret_len == sizeof(connect)); | |
158 | ||
159 | printf_verbose("Received viewer session ID : %" PRIu64 "\n", | |
160 | be64toh(connect.viewer_session_id)); | |
161 | printf_verbose("Relayd version : %u.%u\n", be32toh(connect.major), | |
162 | be32toh(connect.minor)); | |
163 | ||
164 | ret = 0; | |
165 | ||
166 | error: | |
167 | return ret; | |
168 | } | |
169 | ||
b5a1fa45 JD |
170 | static |
171 | void free_session_list(GPtrArray *session_list) | |
172 | { | |
173 | int i; | |
174 | struct lttng_live_relay_session *relay_session; | |
175 | ||
176 | for (i = 0; i < session_list->len; i++) { | |
177 | relay_session = g_ptr_array_index(session_list, i); | |
178 | free(relay_session->name); | |
179 | free(relay_session->hostname); | |
180 | } | |
181 | g_ptr_array_free(session_list, TRUE); | |
182 | } | |
183 | ||
184 | static | |
185 | void print_session_list(GPtrArray *session_list, const char *path) | |
186 | { | |
187 | int i; | |
188 | struct lttng_live_relay_session *relay_session; | |
189 | ||
190 | for (i = 0; i < session_list->len; i++) { | |
191 | relay_session = g_ptr_array_index(session_list, i); | |
192 | fprintf(stdout, "%s/host/%s/%s (timer = %u, " | |
193 | "%u stream(s), %u client(s) connected)\n", | |
194 | path, relay_session->hostname, | |
195 | relay_session->name, relay_session->timer, | |
196 | relay_session->streams, relay_session->clients); | |
197 | } | |
198 | } | |
199 | ||
200 | static | |
201 | void update_session_list(GPtrArray *session_list, char *hostname, | |
202 | char *session_name, uint32_t streams, uint32_t clients, | |
203 | uint32_t timer) | |
204 | { | |
205 | int i, found = 0; | |
206 | struct lttng_live_relay_session *relay_session; | |
207 | ||
208 | for (i = 0; i < session_list->len; i++) { | |
209 | relay_session = g_ptr_array_index(session_list, i); | |
210 | if ((strncmp(relay_session->hostname, hostname, NAME_MAX) == 0) && | |
211 | strncmp(relay_session->name, | |
212 | session_name, NAME_MAX) == 0) { | |
213 | relay_session->streams += streams; | |
214 | if (relay_session->clients < clients) | |
215 | relay_session->clients = clients; | |
216 | found = 1; | |
217 | break; | |
218 | } | |
219 | } | |
220 | if (found) | |
221 | return; | |
222 | ||
223 | relay_session = g_new0(struct lttng_live_relay_session, 1); | |
224 | relay_session->hostname = strndup(hostname, NAME_MAX); | |
225 | relay_session->name = strndup(session_name, NAME_MAX); | |
226 | relay_session->clients = clients; | |
227 | relay_session->streams = streams; | |
228 | relay_session->timer = timer; | |
229 | g_ptr_array_add(session_list, relay_session); | |
230 | } | |
231 | ||
4a744367 JD |
232 | int lttng_live_list_sessions(struct lttng_live_ctx *ctx, const char *path) |
233 | { | |
234 | struct lttng_viewer_cmd cmd; | |
235 | struct lttng_viewer_list_sessions list; | |
236 | struct lttng_viewer_session lsession; | |
b5a1fa45 | 237 | int i, ret, sessions_count, print_list = 0; |
4a744367 | 238 | ssize_t ret_len; |
b5a1fa45 JD |
239 | uint64_t session_id; |
240 | GPtrArray *session_list = NULL; | |
241 | ||
242 | if (strlen(ctx->session_name) == 0) { | |
243 | print_list = 1; | |
244 | session_list = g_ptr_array_new(); | |
245 | } | |
4a744367 JD |
246 | |
247 | cmd.cmd = htobe32(LTTNG_VIEWER_LIST_SESSIONS); | |
248 | cmd.data_size = 0; | |
249 | cmd.cmd_version = 0; | |
250 | ||
251 | do { | |
252 | ret_len = send(ctx->control_sock, &cmd, sizeof(cmd), 0); | |
253 | } while (ret_len < 0 && errno == EINTR); | |
254 | if (ret_len < 0) { | |
79620497 | 255 | perror("[error] Error sending cmd"); |
4a744367 JD |
256 | ret = ret_len; |
257 | goto error; | |
258 | } | |
259 | assert(ret_len == sizeof(cmd)); | |
260 | ||
261 | do { | |
262 | ret_len = recv(ctx->control_sock, &list, sizeof(list), 0); | |
263 | } while (ret_len < 0 && errno == EINTR); | |
f8612f31 MD |
264 | if (ret_len == 0) { |
265 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
266 | ret = -1; | |
267 | goto error; | |
268 | } | |
4a744367 | 269 | if (ret_len < 0) { |
79620497 | 270 | perror("[error] Error receiving session list"); |
4a744367 JD |
271 | ret = ret_len; |
272 | goto error; | |
273 | } | |
274 | assert(ret_len == sizeof(list)); | |
275 | ||
276 | sessions_count = be32toh(list.sessions_count); | |
4a744367 JD |
277 | for (i = 0; i < sessions_count; i++) { |
278 | do { | |
279 | ret_len = recv(ctx->control_sock, &lsession, sizeof(lsession), 0); | |
280 | } while (ret_len < 0 && errno == EINTR); | |
f8612f31 MD |
281 | if (ret_len == 0) { |
282 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
283 | ret = -1; | |
284 | goto error; | |
285 | } | |
4a744367 | 286 | if (ret_len < 0) { |
79620497 | 287 | perror("[error] Error receiving session"); |
4a744367 JD |
288 | ret = ret_len; |
289 | goto error; | |
290 | } | |
291 | assert(ret_len == sizeof(lsession)); | |
9ed31e53 MD |
292 | lsession.hostname[LTTNG_VIEWER_HOST_NAME_MAX - 1] = '\0'; |
293 | lsession.session_name[LTTNG_VIEWER_NAME_MAX - 1] = '\0'; | |
b5a1fa45 JD |
294 | session_id = be64toh(lsession.id); |
295 | ||
296 | if (print_list) { | |
297 | update_session_list(session_list, | |
298 | lsession.hostname, | |
299 | lsession.session_name, | |
300 | be32toh(lsession.streams), | |
301 | be32toh(lsession.clients), | |
302 | be32toh(lsession.live_timer)); | |
303 | } else { | |
304 | if ((strncmp(lsession.session_name, ctx->session_name, | |
305 | NAME_MAX) == 0) && (strncmp(lsession.hostname, | |
306 | ctx->traced_hostname, NAME_MAX) == 0)) { | |
307 | printf_verbose("Reading from session %" PRIu64 "\n", | |
308 | session_id); | |
309 | g_array_append_val(ctx->session_ids, | |
310 | session_id); | |
311 | } | |
312 | } | |
313 | } | |
4a744367 | 314 | |
b5a1fa45 JD |
315 | if (print_list) { |
316 | print_session_list(session_list, path); | |
317 | free_session_list(session_list); | |
4a744367 JD |
318 | } |
319 | ||
320 | ret = 0; | |
321 | ||
322 | error: | |
323 | return ret; | |
324 | } | |
325 | ||
326 | int lttng_live_ctf_trace_assign(struct lttng_live_viewer_stream *stream, | |
327 | uint64_t ctf_trace_id) | |
328 | { | |
329 | struct lttng_live_ctf_trace *trace; | |
330 | int ret = 0; | |
331 | ||
332 | trace = g_hash_table_lookup(stream->session->ctf_traces, | |
333 | (gpointer) ctf_trace_id); | |
334 | if (!trace) { | |
335 | trace = g_new0(struct lttng_live_ctf_trace, 1); | |
4a744367 JD |
336 | trace->ctf_trace_id = ctf_trace_id; |
337 | trace->streams = g_ptr_array_new(); | |
338 | g_hash_table_insert(stream->session->ctf_traces, | |
339 | (gpointer) ctf_trace_id, | |
340 | trace); | |
341 | } | |
342 | if (stream->metadata_flag) | |
343 | trace->metadata_stream = stream; | |
344 | ||
345 | stream->ctf_trace = trace; | |
346 | g_ptr_array_add(trace->streams, stream); | |
347 | ||
4a744367 JD |
348 | return ret; |
349 | } | |
350 | ||
351 | int lttng_live_attach_session(struct lttng_live_ctx *ctx, uint64_t id) | |
352 | { | |
353 | struct lttng_viewer_cmd cmd; | |
354 | struct lttng_viewer_attach_session_request rq; | |
355 | struct lttng_viewer_attach_session_response rp; | |
356 | struct lttng_viewer_stream stream; | |
357 | int ret, i; | |
358 | ssize_t ret_len; | |
359 | ||
360 | cmd.cmd = htobe32(LTTNG_VIEWER_ATTACH_SESSION); | |
361 | cmd.data_size = sizeof(rq); | |
362 | cmd.cmd_version = 0; | |
363 | ||
364 | memset(&rq, 0, sizeof(rq)); | |
365 | rq.session_id = htobe64(id); | |
366 | // TODO: add cmd line parameter to select seek beginning | |
367 | // rq.seek = htobe32(LTTNG_VIEWER_SEEK_BEGINNING); | |
368 | rq.seek = htobe32(LTTNG_VIEWER_SEEK_LAST); | |
369 | ||
370 | do { | |
371 | ret_len = send(ctx->control_sock, &cmd, sizeof(cmd), 0); | |
372 | } while (ret_len < 0 && errno == EINTR); | |
373 | if (ret_len < 0) { | |
79620497 | 374 | perror("[error] Error sending cmd"); |
4a744367 JD |
375 | ret = ret_len; |
376 | goto error; | |
377 | } | |
378 | assert(ret_len == sizeof(cmd)); | |
379 | ||
380 | do { | |
381 | ret_len = send(ctx->control_sock, &rq, sizeof(rq), 0); | |
382 | } while (ret_len < 0 && errno == EINTR); | |
383 | if (ret_len < 0) { | |
79620497 | 384 | perror("[error] Error sending attach request"); |
4a744367 JD |
385 | ret = ret_len; |
386 | goto error; | |
387 | } | |
388 | assert(ret_len == sizeof(rq)); | |
389 | ||
390 | do { | |
391 | ret_len = recv(ctx->control_sock, &rp, sizeof(rp), 0); | |
392 | } while (ret_len < 0 && errno == EINTR); | |
f8612f31 MD |
393 | if (ret_len == 0) { |
394 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
395 | ret = -1; | |
396 | goto error; | |
397 | } | |
4a744367 | 398 | if (ret_len < 0) { |
79620497 | 399 | perror("[error] Error receiving attach response"); |
4a744367 JD |
400 | ret = ret_len; |
401 | goto error; | |
402 | } | |
403 | assert(ret_len == sizeof(rp)); | |
404 | ||
405 | switch(be32toh(rp.status)) { | |
406 | case LTTNG_VIEWER_ATTACH_OK: | |
407 | break; | |
408 | case LTTNG_VIEWER_ATTACH_UNK: | |
409 | ret = -LTTNG_VIEWER_ATTACH_UNK; | |
410 | goto end; | |
411 | case LTTNG_VIEWER_ATTACH_ALREADY: | |
79620497 | 412 | fprintf(stderr, "[error] There is already a viewer attached to this session\n"); |
4a744367 JD |
413 | ret = -1; |
414 | goto end; | |
415 | case LTTNG_VIEWER_ATTACH_NOT_LIVE: | |
416 | fprintf(stderr, "[error] Not a live session\n"); | |
417 | ret = -1; | |
418 | goto end; | |
419 | case LTTNG_VIEWER_ATTACH_SEEK_ERR: | |
420 | fprintf(stderr, "[error] Wrong seek parameter\n"); | |
421 | ret = -1; | |
422 | goto end; | |
423 | default: | |
424 | fprintf(stderr, "[error] Unknown attach return code %u\n", | |
425 | be32toh(rp.status)); | |
426 | ret = -1; | |
427 | goto end; | |
428 | } | |
429 | if (be32toh(rp.status) != LTTNG_VIEWER_ATTACH_OK) { | |
430 | ret = -1; | |
431 | goto end; | |
432 | } | |
433 | ||
2acdc547 | 434 | ctx->session->stream_count += be32toh(rp.streams_count); |
4a744367 JD |
435 | /* |
436 | * When the session is created but not started, we do an active wait | |
437 | * until it starts. It allows the viewer to start processing the trace | |
438 | * as soon as the session starts. | |
439 | */ | |
440 | if (ctx->session->stream_count == 0) { | |
441 | ret = 0; | |
442 | goto end; | |
443 | } | |
444 | printf_verbose("Waiting for %" PRIu64 " streams:\n", | |
445 | ctx->session->stream_count); | |
446 | ctx->session->streams = g_new0(struct lttng_live_viewer_stream, | |
447 | ctx->session->stream_count); | |
4a744367 JD |
448 | for (i = 0; i < be32toh(rp.streams_count); i++) { |
449 | do { | |
450 | ret_len = recv(ctx->control_sock, &stream, sizeof(stream), 0); | |
451 | } while (ret_len < 0 && errno == EINTR); | |
f8612f31 MD |
452 | if (ret_len == 0) { |
453 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
454 | ret = -1; | |
455 | goto error; | |
456 | } | |
4a744367 | 457 | if (ret_len < 0) { |
79620497 | 458 | perror("[error] Error receiving stream"); |
4a744367 JD |
459 | ret = ret_len; |
460 | goto error; | |
461 | } | |
462 | assert(ret_len == sizeof(stream)); | |
9ed31e53 MD |
463 | stream.path_name[LTTNG_VIEWER_PATH_MAX - 1] = '\0'; |
464 | stream.channel_name[LTTNG_VIEWER_NAME_MAX - 1] = '\0'; | |
4a744367 JD |
465 | |
466 | printf_verbose(" stream %" PRIu64 " : %s/%s\n", | |
467 | be64toh(stream.id), stream.path_name, | |
468 | stream.channel_name); | |
469 | ctx->session->streams[i].id = be64toh(stream.id); | |
470 | ctx->session->streams[i].session = ctx->session; | |
471 | ||
472 | ctx->session->streams[i].first_read = 1; | |
473 | ctx->session->streams[i].mmap_size = 0; | |
474 | ||
475 | if (be32toh(stream.metadata_flag)) { | |
476 | char *path; | |
477 | ||
478 | path = strdup(LTTNG_METADATA_PATH_TEMPLATE); | |
6a4d2b5a MD |
479 | if (!path) { |
480 | perror("strdup"); | |
481 | ret = -1; | |
482 | goto error; | |
483 | } | |
484 | if (!mkdtemp(path)) { | |
485 | perror("mkdtemp"); | |
486 | free(path); | |
487 | ret = -1; | |
488 | goto error; | |
489 | } | |
4a744367 | 490 | ctx->session->streams[i].metadata_flag = 1; |
4a744367 JD |
491 | snprintf(ctx->session->streams[i].path, |
492 | sizeof(ctx->session->streams[i].path), | |
493 | "%s/%s", path, | |
494 | stream.channel_name); | |
495 | ret = open(ctx->session->streams[i].path, | |
496 | O_WRONLY | O_CREAT | O_TRUNC, | |
497 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
498 | if (ret < 0) { | |
ab9d07f0 | 499 | perror("open"); |
6a4d2b5a | 500 | free(path); |
4a744367 JD |
501 | goto error; |
502 | } | |
503 | ctx->session->streams[i].fd = ret; | |
6a4d2b5a | 504 | free(path); |
4a744367 JD |
505 | } |
506 | ret = lttng_live_ctf_trace_assign(&ctx->session->streams[i], | |
507 | be64toh(stream.ctf_trace_id)); | |
508 | if (ret < 0) { | |
509 | goto error; | |
510 | } | |
511 | ||
512 | } | |
513 | ret = 0; | |
514 | ||
515 | end: | |
516 | error: | |
517 | return ret; | |
518 | } | |
519 | ||
2acdc547 JD |
520 | static |
521 | int ask_new_streams(struct lttng_live_ctx *ctx) | |
522 | { | |
523 | int i, ret = 0; | |
524 | uint64_t id; | |
525 | ||
526 | restart: | |
527 | for (i = 0; i < ctx->session_ids->len; i++) { | |
528 | id = g_array_index(ctx->session_ids, uint64_t, i); | |
529 | ret = lttng_live_get_new_streams(ctx, id); | |
530 | printf_verbose("Asking for new streams returns %d\n", | |
531 | ret); | |
532 | if (ret < 0) { | |
533 | if (ret == -LTTNG_VIEWER_NEW_STREAMS_HUP) { | |
534 | printf_verbose("Session %" PRIu64 " closed\n", | |
535 | id); | |
b5a1fa45 JD |
536 | /* |
537 | * The streams have already been closed during | |
538 | * the reading, so we only need to get rid of | |
539 | * the trace in our internal table of sessions. | |
540 | */ | |
2acdc547 JD |
541 | g_array_remove_index(ctx->session_ids, i); |
542 | /* | |
543 | * We can't continue iterating on the g_array | |
544 | * after a remove, we have to start again. | |
545 | */ | |
546 | goto restart; | |
547 | } else { | |
548 | ret = -1; | |
549 | goto end; | |
550 | } | |
551 | } | |
552 | } | |
553 | ||
554 | end: | |
555 | return ret; | |
556 | } | |
557 | ||
4a744367 JD |
558 | static |
559 | int get_data_packet(struct lttng_live_ctx *ctx, | |
560 | struct ctf_stream_pos *pos, | |
561 | struct lttng_live_viewer_stream *stream, uint64_t offset, | |
562 | uint64_t len) | |
563 | { | |
564 | struct lttng_viewer_cmd cmd; | |
565 | struct lttng_viewer_get_packet rq; | |
566 | struct lttng_viewer_trace_packet rp; | |
567 | ssize_t ret_len; | |
568 | int ret; | |
569 | ||
570 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_PACKET); | |
571 | cmd.data_size = sizeof(rq); | |
572 | cmd.cmd_version = 0; | |
573 | ||
574 | memset(&rq, 0, sizeof(rq)); | |
575 | rq.stream_id = htobe64(stream->id); | |
576 | /* Already in big endian. */ | |
577 | rq.offset = offset; | |
578 | rq.len = htobe32(len); | |
579 | ||
580 | do { | |
581 | ret_len = send(ctx->control_sock, &cmd, sizeof(cmd), 0); | |
582 | } while (ret_len < 0 && errno == EINTR); | |
583 | if (ret_len < 0) { | |
79620497 | 584 | perror("[error] Error sending cmd"); |
4a744367 JD |
585 | ret = ret_len; |
586 | goto error; | |
587 | } | |
588 | assert(ret_len == sizeof(cmd)); | |
589 | ||
590 | do { | |
591 | ret_len = send(ctx->control_sock, &rq, sizeof(rq), 0); | |
592 | } while (ret_len < 0 && errno == EINTR); | |
593 | if (ret_len < 0) { | |
79620497 | 594 | perror("[error] Error sending get_data_packet request"); |
4a744367 JD |
595 | ret = ret_len; |
596 | goto error; | |
597 | } | |
598 | assert(ret_len == sizeof(rq)); | |
599 | ||
600 | do { | |
601 | ret_len = recv(ctx->control_sock, &rp, sizeof(rp), 0); | |
602 | } while (ret_len < 0 && errno == EINTR); | |
f8612f31 MD |
603 | if (ret_len == 0) { |
604 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
605 | ret = -1; | |
606 | goto error; | |
607 | } | |
4a744367 | 608 | if (ret_len < 0) { |
79620497 | 609 | perror("[error] Error receiving data response"); |
4a744367 JD |
610 | ret = ret_len; |
611 | goto error; | |
612 | } | |
57b9d843 JD |
613 | if (ret_len != sizeof(rp)) { |
614 | fprintf(stderr, "[error] get_data_packet: expected %" PRId64 | |
615 | ", received %" PRId64 "\n", ret_len, | |
616 | sizeof(rp)); | |
617 | ret = -1; | |
618 | goto error; | |
619 | } | |
4a744367 JD |
620 | |
621 | rp.flags = be32toh(rp.flags); | |
622 | ||
623 | switch (be32toh(rp.status)) { | |
624 | case LTTNG_VIEWER_GET_PACKET_OK: | |
625 | len = be32toh(rp.len); | |
626 | printf_verbose("get_data_packet: Ok, packet size : %" PRIu64 | |
627 | "\n", len); | |
628 | break; | |
629 | case LTTNG_VIEWER_GET_PACKET_RETRY: | |
630 | printf_verbose("get_data_packet: retry\n"); | |
631 | ret = -1; | |
632 | goto end; | |
633 | case LTTNG_VIEWER_GET_PACKET_ERR: | |
634 | if (rp.flags & LTTNG_VIEWER_FLAG_NEW_METADATA) { | |
635 | printf_verbose("get_data_packet: new metadata needed\n"); | |
bb17fa55 JD |
636 | ret = get_new_metadata(ctx, stream); |
637 | if (ret < 0) { | |
638 | goto error; | |
639 | } | |
4a744367 JD |
640 | ret = 0; |
641 | goto end; | |
642 | } | |
2acdc547 JD |
643 | if (rp.flags & LTTNG_VIEWER_FLAG_NEW_STREAM) { |
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); | |
649 | } | |
4a744367 JD |
650 | fprintf(stderr, "[error] get_data_packet: error\n"); |
651 | ret = -1; | |
652 | goto end; | |
653 | case LTTNG_VIEWER_GET_PACKET_EOF: | |
654 | ret = -2; | |
655 | goto error; | |
656 | default: | |
657 | printf_verbose("get_data_packet: unknown\n"); | |
658 | assert(0); | |
659 | ret = -1; | |
660 | goto end; | |
661 | } | |
662 | ||
663 | if (len <= 0) { | |
664 | ret = -1; | |
665 | goto end; | |
666 | } | |
667 | ||
668 | if (len > stream->mmap_size) { | |
669 | uint64_t new_size; | |
670 | ||
671 | new_size = max_t(uint64_t, len, stream->mmap_size << 1); | |
672 | if (pos->base_mma) { | |
673 | /* unmap old base */ | |
674 | ret = munmap_align(pos->base_mma); | |
675 | if (ret) { | |
79620497 | 676 | perror("[error] Unable to unmap old base"); |
4a744367 JD |
677 | ret = -1; |
678 | goto error; | |
679 | } | |
680 | pos->base_mma = NULL; | |
681 | } | |
682 | pos->base_mma = mmap_align(new_size, | |
683 | PROT_READ | PROT_WRITE, | |
684 | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); | |
685 | if (pos->base_mma == MAP_FAILED) { | |
79620497 | 686 | perror("[error] mmap error"); |
4a744367 JD |
687 | pos->base_mma = NULL; |
688 | ret = -1; | |
689 | goto error; | |
690 | } | |
691 | ||
692 | stream->mmap_size = new_size; | |
693 | printf_verbose("Expanding stream mmap size to %" PRIu64 " bytes\n", | |
694 | stream->mmap_size); | |
695 | } | |
696 | ||
697 | do { | |
698 | ret_len = recv(ctx->control_sock, | |
699 | mmap_align_addr(pos->base_mma), len, | |
700 | MSG_WAITALL); | |
701 | } while (ret_len < 0 && errno == EINTR); | |
f8612f31 MD |
702 | if (ret_len == 0) { |
703 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
704 | ret = -1; | |
705 | goto error; | |
706 | } | |
4a744367 | 707 | if (ret_len < 0) { |
79620497 | 708 | perror("[error] Error receiving trace packet"); |
4a744367 JD |
709 | ret = ret_len; |
710 | goto error; | |
711 | } | |
712 | assert(ret_len == len); | |
713 | ||
714 | end: | |
715 | error: | |
716 | return ret; | |
717 | } | |
718 | ||
4a744367 | 719 | static |
bb17fa55 JD |
720 | int get_one_metadata_packet(struct lttng_live_ctx *ctx, |
721 | struct lttng_live_viewer_stream *metadata_stream) | |
4a744367 JD |
722 | { |
723 | uint64_t len = 0; | |
724 | int ret; | |
725 | struct lttng_viewer_cmd cmd; | |
726 | struct lttng_viewer_get_metadata rq; | |
727 | struct lttng_viewer_metadata_packet rp; | |
4a744367 JD |
728 | char *data = NULL; |
729 | ssize_t ret_len; | |
730 | ||
bb17fa55 | 731 | rq.stream_id = htobe64(metadata_stream->id); |
4a744367 JD |
732 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_METADATA); |
733 | cmd.data_size = sizeof(rq); | |
734 | cmd.cmd_version = 0; | |
735 | ||
4a744367 JD |
736 | do { |
737 | ret_len = send(ctx->control_sock, &cmd, sizeof(cmd), 0); | |
738 | } while (ret_len < 0 && errno == EINTR); | |
739 | if (ret_len < 0) { | |
79620497 | 740 | perror("[error] Error sending cmd"); |
4a744367 JD |
741 | ret = ret_len; |
742 | goto error; | |
743 | } | |
744 | assert(ret_len == sizeof(cmd)); | |
745 | ||
746 | do { | |
747 | ret_len = send(ctx->control_sock, &rq, sizeof(rq), 0); | |
748 | } while (ret_len < 0 && errno == EINTR); | |
749 | if (ret_len < 0) { | |
79620497 | 750 | perror("[error] Error sending get_metadata request"); |
4a744367 JD |
751 | ret = ret_len; |
752 | goto error; | |
753 | } | |
754 | assert(ret_len == sizeof(rq)); | |
755 | ||
756 | do { | |
757 | ret_len = recv(ctx->control_sock, &rp, sizeof(rp), 0); | |
758 | } while (ret_len < 0 && errno == EINTR); | |
f8612f31 MD |
759 | if (ret_len == 0) { |
760 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
761 | ret = -1; | |
762 | goto error; | |
763 | } | |
4a744367 | 764 | if (ret_len < 0) { |
79620497 | 765 | perror("[error] Error receiving metadata response"); |
4a744367 JD |
766 | ret = ret_len; |
767 | goto error; | |
768 | } | |
769 | assert(ret_len == sizeof(rp)); | |
770 | ||
771 | switch (be32toh(rp.status)) { | |
772 | case LTTNG_VIEWER_METADATA_OK: | |
773 | printf_verbose("get_metadata : OK\n"); | |
774 | break; | |
775 | case LTTNG_VIEWER_NO_NEW_METADATA: | |
776 | printf_verbose("get_metadata : NO NEW\n"); | |
bb17fa55 | 777 | ret = 0; |
4a744367 JD |
778 | goto end; |
779 | case LTTNG_VIEWER_METADATA_ERR: | |
780 | printf_verbose("get_metadata : ERR\n"); | |
781 | ret = -1; | |
782 | goto end; | |
783 | default: | |
784 | printf_verbose("get_metadata : UNKNOWN\n"); | |
785 | ret = -1; | |
786 | goto end; | |
787 | } | |
788 | ||
789 | len = be64toh(rp.len); | |
790 | printf_verbose("Writing %" PRIu64" bytes to metadata\n", len); | |
791 | if (len <= 0) { | |
792 | ret = -1; | |
793 | goto end; | |
794 | } | |
795 | ||
796 | data = zmalloc(len); | |
797 | if (!data) { | |
798 | perror("relay data zmalloc"); | |
799 | ret = -1; | |
800 | goto error; | |
801 | } | |
802 | do { | |
803 | ret_len = recv(ctx->control_sock, data, len, MSG_WAITALL); | |
804 | } while (ret_len < 0 && errno == EINTR); | |
f8612f31 MD |
805 | if (ret_len == 0) { |
806 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
807 | ret = -1; | |
808 | free(data); | |
809 | goto error; | |
810 | } | |
4a744367 | 811 | if (ret_len < 0) { |
79620497 | 812 | perror("[error] Error receiving trace packet"); |
4a744367 JD |
813 | ret = ret_len; |
814 | free(data); | |
815 | goto error; | |
816 | } | |
817 | assert(ret_len == len); | |
818 | ||
819 | do { | |
820 | ret_len = write(metadata_stream->fd, data, len); | |
821 | } while (ret_len < 0 && errno == EINTR); | |
822 | if (ret_len < 0) { | |
823 | free(data); | |
824 | ret = ret_len; | |
825 | goto error; | |
826 | } | |
827 | assert(ret_len == len); | |
bb17fa55 | 828 | ret = len; |
4a744367 JD |
829 | |
830 | free(data); | |
831 | ||
4a744367 JD |
832 | end: |
833 | error: | |
834 | return ret; | |
835 | } | |
836 | ||
bb17fa55 JD |
837 | /* |
838 | * Return 0 on success, a negative value on error. | |
839 | */ | |
840 | static | |
841 | int get_new_metadata(struct lttng_live_ctx *ctx, | |
842 | struct lttng_live_viewer_stream *viewer_stream) | |
843 | { | |
844 | int ret = 0; | |
845 | struct lttng_live_viewer_stream *metadata_stream; | |
846 | ||
847 | metadata_stream = viewer_stream->ctf_trace->metadata_stream; | |
848 | ||
849 | do { | |
850 | /* | |
851 | * get_one_metadata_packet returns the number of bytes | |
852 | * received, 0 when we have received everything, a | |
853 | * negative value on error. | |
854 | */ | |
855 | ret = get_one_metadata_packet(ctx, metadata_stream); | |
856 | } while (ret > 0); | |
857 | ||
858 | fclose(metadata_stream->metadata_fp_write); | |
859 | metadata_stream->metadata_fp_write = NULL; | |
860 | ||
861 | error: | |
862 | return ret; | |
863 | } | |
864 | ||
4a744367 JD |
865 | /* |
866 | * Get one index for a stream. | |
867 | * | |
868 | * Returns 0 on success or a negative value on error. | |
869 | */ | |
870 | static | |
871 | int get_next_index(struct lttng_live_ctx *ctx, | |
872 | struct lttng_live_viewer_stream *viewer_stream, | |
873 | struct packet_index *index) | |
874 | { | |
875 | struct lttng_viewer_cmd cmd; | |
876 | struct lttng_viewer_get_next_index rq; | |
877 | struct lttng_viewer_index rp; | |
878 | int ret; | |
4a744367 JD |
879 | ssize_t ret_len; |
880 | ||
881 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_NEXT_INDEX); | |
882 | cmd.data_size = sizeof(rq); | |
883 | cmd.cmd_version = 0; | |
884 | ||
885 | memset(&rq, 0, sizeof(rq)); | |
886 | rq.stream_id = htobe64(viewer_stream->id); | |
887 | ||
888 | retry: | |
889 | do { | |
890 | ret_len = send(ctx->control_sock, &cmd, sizeof(cmd), 0); | |
891 | } while (ret_len < 0 && errno == EINTR); | |
892 | if (ret_len < 0) { | |
79620497 | 893 | perror("[error] Error sending cmd"); |
4a744367 JD |
894 | ret = ret_len; |
895 | goto error; | |
896 | } | |
897 | assert(ret_len == sizeof(cmd)); | |
898 | ||
899 | do { | |
900 | ret_len = send(ctx->control_sock, &rq, sizeof(rq), 0); | |
901 | } while (ret_len < 0 && errno == EINTR); | |
902 | if (ret_len < 0) { | |
79620497 | 903 | perror("[error] Error sending get_next_index request"); |
4a744367 JD |
904 | ret = ret_len; |
905 | goto error; | |
906 | } | |
907 | assert(ret_len == sizeof(rq)); | |
908 | ||
909 | do { | |
910 | ret_len = recv(ctx->control_sock, &rp, sizeof(rp), 0); | |
911 | } while (ret_len < 0 && errno == EINTR); | |
f8612f31 MD |
912 | if (ret_len == 0) { |
913 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
914 | ret = -1; | |
915 | goto error; | |
916 | } | |
4a744367 | 917 | if (ret_len < 0) { |
79620497 | 918 | perror("[error] Error receiving index response"); |
4a744367 JD |
919 | ret = ret_len; |
920 | goto error; | |
921 | } | |
922 | assert(ret_len == sizeof(rp)); | |
923 | ||
924 | rp.flags = be32toh(rp.flags); | |
925 | ||
926 | switch (be32toh(rp.status)) { | |
927 | case LTTNG_VIEWER_INDEX_INACTIVE: | |
928 | printf_verbose("get_next_index: inactive\n"); | |
929 | memset(index, 0, sizeof(struct packet_index)); | |
992e8cc0 | 930 | index->ts_cycles.timestamp_end = be64toh(rp.timestamp_end); |
4a744367 JD |
931 | break; |
932 | case LTTNG_VIEWER_INDEX_OK: | |
933 | printf_verbose("get_next_index: Ok, need metadata update : %u\n", | |
934 | rp.flags & LTTNG_VIEWER_FLAG_NEW_METADATA); | |
935 | index->offset = be64toh(rp.offset); | |
936 | index->packet_size = be64toh(rp.packet_size); | |
937 | index->content_size = be64toh(rp.content_size); | |
992e8cc0 MD |
938 | index->ts_cycles.timestamp_begin = be64toh(rp.timestamp_begin); |
939 | index->ts_cycles.timestamp_end = be64toh(rp.timestamp_end); | |
4a744367 JD |
940 | index->events_discarded = be64toh(rp.events_discarded); |
941 | ||
942 | if (rp.flags & LTTNG_VIEWER_FLAG_NEW_METADATA) { | |
943 | printf_verbose("get_next_index: new metadata needed\n"); | |
bb17fa55 | 944 | ret = get_new_metadata(ctx, viewer_stream); |
4a744367 JD |
945 | if (ret < 0) { |
946 | goto error; | |
947 | } | |
948 | } | |
2acdc547 JD |
949 | if (rp.flags & LTTNG_VIEWER_FLAG_NEW_STREAM) { |
950 | ret = ask_new_streams(ctx); | |
951 | if (ret < 0) | |
952 | goto error; | |
953 | g_hash_table_foreach(ctx->session->ctf_traces, add_traces, | |
954 | ctx->bt_ctx); | |
955 | } | |
4a744367 JD |
956 | break; |
957 | case LTTNG_VIEWER_INDEX_RETRY: | |
958 | printf_verbose("get_next_index: retry\n"); | |
959 | sleep(1); | |
960 | goto retry; | |
961 | case LTTNG_VIEWER_INDEX_HUP: | |
962 | printf_verbose("get_next_index: stream hung up\n"); | |
963 | viewer_stream->id = -1ULL; | |
964 | viewer_stream->fd = -1; | |
965 | index->offset = EOF; | |
2acdc547 | 966 | ctx->session->stream_count--; |
4a744367 JD |
967 | break; |
968 | case LTTNG_VIEWER_INDEX_ERR: | |
969 | fprintf(stderr, "[error] get_next_index: error\n"); | |
970 | ret = -1; | |
971 | goto error; | |
972 | default: | |
973 | fprintf(stderr, "[error] get_next_index: unkwown value\n"); | |
974 | ret = -1; | |
975 | goto error; | |
976 | } | |
977 | ||
978 | ret = 0; | |
979 | ||
980 | error: | |
981 | return ret; | |
982 | } | |
983 | ||
b5a1fa45 | 984 | static |
4a744367 JD |
985 | void ctf_live_packet_seek(struct bt_stream_pos *stream_pos, size_t index, |
986 | int whence) | |
987 | { | |
988 | struct ctf_stream_pos *pos; | |
989 | struct ctf_file_stream *file_stream; | |
f1f52630 | 990 | struct packet_index *prev_index = NULL, *cur_index; |
4a744367 JD |
991 | struct lttng_live_viewer_stream *viewer_stream; |
992 | struct lttng_live_session *session; | |
993 | int ret; | |
994 | ||
995 | retry: | |
996 | pos = ctf_pos(stream_pos); | |
997 | file_stream = container_of(pos, struct ctf_file_stream, pos); | |
998 | viewer_stream = (struct lttng_live_viewer_stream *) pos->priv; | |
999 | session = viewer_stream->session; | |
1000 | ||
f1f52630 MD |
1001 | switch (pos->packet_index->len) { |
1002 | case 0: | |
1003 | g_array_set_size(pos->packet_index, 1); | |
1004 | cur_index = &g_array_index(pos->packet_index, | |
1005 | struct packet_index, 0); | |
1006 | break; | |
1007 | case 1: | |
1008 | g_array_set_size(pos->packet_index, 2); | |
1009 | prev_index = &g_array_index(pos->packet_index, | |
1010 | struct packet_index, 0); | |
1011 | cur_index = &g_array_index(pos->packet_index, | |
1012 | struct packet_index, 1); | |
1013 | break; | |
1014 | case 2: | |
1015 | g_array_index(pos->packet_index, | |
1016 | struct packet_index, 0) = | |
1017 | g_array_index(pos->packet_index, | |
1018 | struct packet_index, 1); | |
1019 | prev_index = &g_array_index(pos->packet_index, | |
1020 | struct packet_index, 0); | |
1021 | cur_index = &g_array_index(pos->packet_index, | |
1022 | struct packet_index, 1); | |
1023 | break; | |
1024 | default: | |
1025 | abort(); | |
1026 | break; | |
1027 | } | |
4a744367 | 1028 | printf_verbose("get_next_index for stream %" PRIu64 "\n", viewer_stream->id); |
f1f52630 | 1029 | ret = get_next_index(session->ctx, viewer_stream, cur_index); |
4a744367 JD |
1030 | if (ret < 0) { |
1031 | pos->offset = EOF; | |
1032 | fprintf(stderr, "[error] get_next_index failed\n"); | |
1033 | return; | |
1034 | } | |
1035 | ||
f1f52630 MD |
1036 | pos->packet_size = cur_index->packet_size; |
1037 | pos->content_size = cur_index->content_size; | |
4a744367 | 1038 | pos->mmap_base_offset = 0; |
f1f52630 | 1039 | if (cur_index->offset == EOF) { |
4a744367 JD |
1040 | pos->offset = EOF; |
1041 | } else { | |
1042 | pos->offset = 0; | |
1043 | } | |
1044 | ||
f1f52630 MD |
1045 | if (cur_index->content_size == 0) { |
1046 | file_stream->parent.cycles_timestamp = | |
1047 | cur_index->ts_cycles.timestamp_end; | |
4a744367 | 1048 | file_stream->parent.real_timestamp = ctf_get_real_timestamp( |
f1f52630 MD |
1049 | &file_stream->parent, |
1050 | cur_index->ts_cycles.timestamp_end); | |
4a744367 | 1051 | } else { |
f1f52630 MD |
1052 | /* Convert the timestamps and append to the real_index. */ |
1053 | cur_index->ts_real.timestamp_begin = ctf_get_real_timestamp( | |
1054 | &file_stream->parent, | |
1055 | cur_index->ts_cycles.timestamp_begin); | |
1056 | cur_index->ts_real.timestamp_end = ctf_get_real_timestamp( | |
1057 | &file_stream->parent, | |
1058 | cur_index->ts_cycles.timestamp_end); | |
1059 | ||
1060 | ctf_update_current_packet_index(&file_stream->parent, | |
1061 | prev_index, cur_index); | |
1062 | ||
1063 | file_stream->parent.cycles_timestamp = | |
1064 | cur_index->ts_cycles.timestamp_begin; | |
1065 | file_stream->parent.real_timestamp = | |
1066 | cur_index->ts_real.timestamp_begin; | |
4a744367 JD |
1067 | } |
1068 | ||
1069 | if (pos->packet_size == 0 || pos->offset == EOF) { | |
1070 | goto end; | |
1071 | } | |
1072 | ||
1073 | printf_verbose("get_data_packet for stream %" PRIu64 "\n", | |
1074 | viewer_stream->id); | |
1075 | ret = get_data_packet(session->ctx, pos, viewer_stream, | |
f1f52630 MD |
1076 | be64toh(cur_index->offset), |
1077 | cur_index->packet_size / CHAR_BIT); | |
4a744367 JD |
1078 | if (ret == -2) { |
1079 | goto retry; | |
1080 | } else if (ret < 0) { | |
1081 | pos->offset = EOF; | |
1082 | fprintf(stderr, "[error] get_data_packet failed\n"); | |
1083 | return; | |
1084 | } | |
1085 | ||
1086 | printf_verbose("Index received : packet_size : %" PRIu64 | |
1087 | ", offset %" PRIu64 ", content_size %" PRIu64 | |
1088 | ", timestamp_end : %" PRIu64 "\n", | |
f1f52630 MD |
1089 | cur_index->packet_size, cur_index->offset, |
1090 | cur_index->content_size, | |
1091 | cur_index->ts_cycles.timestamp_end); | |
4a744367 JD |
1092 | |
1093 | /* update trace_packet_header and stream_packet_context */ | |
1094 | if (pos->prot != PROT_WRITE && file_stream->parent.trace_packet_header) { | |
1095 | /* Read packet header */ | |
1096 | ret = generic_rw(&pos->parent, &file_stream->parent.trace_packet_header->p); | |
1097 | if (ret) { | |
1098 | pos->offset = EOF; | |
1099 | fprintf(stderr, "[error] trace packet header read failed\n"); | |
1100 | goto end; | |
1101 | } | |
1102 | } | |
1103 | if (pos->prot != PROT_WRITE && file_stream->parent.stream_packet_context) { | |
1104 | /* Read packet context */ | |
1105 | ret = generic_rw(&pos->parent, &file_stream->parent.stream_packet_context->p); | |
1106 | if (ret) { | |
1107 | pos->offset = EOF; | |
1108 | fprintf(stderr, "[error] stream packet context read failed\n"); | |
1109 | goto end; | |
1110 | } | |
1111 | } | |
1112 | pos->data_offset = pos->offset; | |
1113 | ||
1114 | end: | |
1115 | return; | |
1116 | } | |
1117 | ||
2acdc547 JD |
1118 | int lttng_live_create_viewer_session(struct lttng_live_ctx *ctx) |
1119 | { | |
1120 | struct lttng_viewer_cmd cmd; | |
1121 | struct lttng_viewer_create_session_response resp; | |
1122 | int ret; | |
1123 | ssize_t ret_len; | |
1124 | ||
1125 | cmd.cmd = htobe32(LTTNG_VIEWER_CREATE_SESSION); | |
1126 | cmd.data_size = 0; | |
1127 | cmd.cmd_version = 0; | |
1128 | ||
1129 | do { | |
1130 | ret_len = send(ctx->control_sock, &cmd, sizeof(cmd), 0); | |
1131 | } while (ret_len < 0 && errno == EINTR); | |
1132 | if (ret_len < 0) { | |
79620497 | 1133 | perror("[error] Error sending cmd"); |
2acdc547 JD |
1134 | ret = ret_len; |
1135 | goto error; | |
1136 | } | |
1137 | assert(ret_len == sizeof(cmd)); | |
1138 | ||
1139 | do { | |
1140 | ret_len = recv(ctx->control_sock, &resp, sizeof(resp), 0); | |
1141 | } while (ret_len < 0 && errno == EINTR); | |
f8612f31 MD |
1142 | if (ret_len == 0) { |
1143 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
1144 | ret = -1; | |
1145 | goto error; | |
1146 | } | |
2acdc547 | 1147 | if (ret_len < 0) { |
79620497 | 1148 | perror("[error] Error receiving create session reply"); |
2acdc547 JD |
1149 | ret = ret_len; |
1150 | goto error; | |
1151 | } | |
1152 | assert(ret_len == sizeof(resp)); | |
1153 | ||
1154 | if (be32toh(resp.status) != LTTNG_VIEWER_CREATE_SESSION_OK) { | |
1155 | fprintf(stderr, "[error] Error creating viewer session\n"); | |
1156 | ret = -1; | |
1157 | goto error; | |
1158 | } | |
1159 | ret = 0; | |
1160 | ||
1161 | error: | |
1162 | return ret; | |
1163 | } | |
1164 | ||
1165 | static | |
1166 | int del_traces(gpointer key, gpointer value, gpointer user_data) | |
4a744367 JD |
1167 | { |
1168 | struct bt_context *bt_ctx = user_data; | |
1169 | struct lttng_live_ctf_trace *trace = value; | |
1170 | int ret; | |
1171 | ||
1172 | ret = bt_context_remove_trace(bt_ctx, trace->trace_id); | |
1173 | if (ret < 0) | |
1174 | fprintf(stderr, "[error] removing trace from context\n"); | |
1175 | ||
1176 | /* remove the key/value pair from the HT. */ | |
1177 | return 1; | |
1178 | } | |
1179 | ||
2acdc547 JD |
1180 | static |
1181 | void add_traces(gpointer key, gpointer value, gpointer user_data) | |
4a744367 | 1182 | { |
bb17fa55 | 1183 | int i, ret; |
4a744367 JD |
1184 | struct bt_context *bt_ctx = user_data; |
1185 | struct lttng_live_ctf_trace *trace = value; | |
1186 | struct lttng_live_viewer_stream *stream; | |
1187 | struct bt_mmap_stream *new_mmap_stream; | |
1188 | struct bt_mmap_stream_list mmap_list; | |
1189 | struct lttng_live_ctx *ctx = NULL; | |
1190 | ||
b5a1fa45 JD |
1191 | /* |
1192 | * We don't know how many streams we will receive for a trace, so | |
1193 | * once we are done receiving the traces, we add all the traces | |
1194 | * received to the bt_context. | |
1195 | * We can receive streams during the attach command or the | |
1196 | * get_new_streams, so we have to make sure not to add multiple | |
1197 | * times the same traces. | |
1198 | * If a trace is already in the context, we just skip this function. | |
1199 | */ | |
2acdc547 JD |
1200 | if (trace->in_use) |
1201 | return; | |
1202 | ||
4a744367 JD |
1203 | BT_INIT_LIST_HEAD(&mmap_list.head); |
1204 | ||
1205 | for (i = 0; i < trace->streams->len; i++) { | |
1206 | stream = g_ptr_array_index(trace->streams, i); | |
1207 | ctx = stream->session->ctx; | |
1208 | ||
1209 | if (!stream->metadata_flag) { | |
1210 | new_mmap_stream = zmalloc(sizeof(struct bt_mmap_stream)); | |
1211 | new_mmap_stream->priv = (void *) stream; | |
1212 | new_mmap_stream->fd = -1; | |
1213 | bt_list_add(&new_mmap_stream->list, &mmap_list.head); | |
1214 | } else { | |
1215 | /* Get all possible metadata before starting */ | |
bb17fa55 JD |
1216 | ret = get_new_metadata(ctx, stream); |
1217 | if (ret) | |
1218 | goto end_free; | |
4a744367 JD |
1219 | trace->metadata_fp = fopen(stream->path, "r"); |
1220 | } | |
1221 | } | |
1222 | ||
1223 | if (!trace->metadata_fp) { | |
1224 | fprintf(stderr, "[error] No metadata stream opened\n"); | |
1225 | goto end_free; | |
1226 | } | |
1227 | ||
1228 | ret = bt_context_add_trace(bt_ctx, NULL, "ctf", | |
1229 | ctf_live_packet_seek, &mmap_list, trace->metadata_fp); | |
1230 | if (ret < 0) { | |
1231 | fprintf(stderr, "[error] Error adding trace\n"); | |
1232 | goto end_free; | |
1233 | } | |
2acdc547 JD |
1234 | |
1235 | if (bt_ctx->current_iterator) { | |
1236 | struct bt_trace_descriptor *td; | |
1237 | struct bt_trace_handle *handle; | |
1238 | ||
1239 | handle = (struct bt_trace_handle *) g_hash_table_lookup( | |
1240 | bt_ctx->trace_handles, | |
1241 | (gpointer) (unsigned long) ret); | |
1242 | td = handle->td; | |
2acdc547 JD |
1243 | bt_iter_add_trace(bt_ctx->current_iterator, td); |
1244 | } | |
1245 | ||
4a744367 | 1246 | trace->trace_id = ret; |
2acdc547 | 1247 | trace->in_use = 1; |
4a744367 JD |
1248 | |
1249 | goto end; | |
1250 | ||
1251 | end_free: | |
1252 | bt_context_put(bt_ctx); | |
1253 | end: | |
1254 | return; | |
1255 | } | |
1256 | ||
2acdc547 | 1257 | int lttng_live_get_new_streams(struct lttng_live_ctx *ctx, uint64_t id) |
6192b988 JD |
1258 | { |
1259 | struct lttng_viewer_cmd cmd; | |
2acdc547 JD |
1260 | struct lttng_viewer_new_streams_request rq; |
1261 | struct lttng_viewer_new_streams_response rp; | |
1262 | struct lttng_viewer_stream stream; | |
1263 | int ret, i; | |
6192b988 | 1264 | ssize_t ret_len; |
b5a1fa45 | 1265 | uint32_t stream_count; |
6192b988 | 1266 | |
2acdc547 JD |
1267 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_NEW_STREAMS); |
1268 | cmd.data_size = sizeof(rq); | |
6192b988 JD |
1269 | cmd.cmd_version = 0; |
1270 | ||
2acdc547 JD |
1271 | memset(&rq, 0, sizeof(rq)); |
1272 | rq.session_id = htobe64(id); | |
1273 | ||
6192b988 JD |
1274 | do { |
1275 | ret_len = send(ctx->control_sock, &cmd, sizeof(cmd), 0); | |
1276 | } while (ret_len < 0 && errno == EINTR); | |
1277 | if (ret_len < 0) { | |
79620497 | 1278 | perror("[error] Error sending cmd"); |
6192b988 JD |
1279 | ret = ret_len; |
1280 | goto error; | |
1281 | } | |
1282 | assert(ret_len == sizeof(cmd)); | |
1283 | ||
1284 | do { | |
2acdc547 | 1285 | ret_len = send(ctx->control_sock, &rq, sizeof(rq), 0); |
6192b988 JD |
1286 | } while (ret_len < 0 && errno == EINTR); |
1287 | if (ret_len < 0) { | |
79620497 | 1288 | perror("[error] Error sending get_new_streams request"); |
6192b988 JD |
1289 | ret = ret_len; |
1290 | goto error; | |
1291 | } | |
2acdc547 | 1292 | assert(ret_len == sizeof(rq)); |
6192b988 | 1293 | |
2acdc547 JD |
1294 | do { |
1295 | ret_len = recv(ctx->control_sock, &rp, sizeof(rp), 0); | |
1296 | } while (ret_len < 0 && errno == EINTR); | |
f8612f31 MD |
1297 | if (ret_len == 0) { |
1298 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
1299 | ret = -1; | |
1300 | goto error; | |
1301 | } | |
2acdc547 | 1302 | if (ret_len < 0) { |
79620497 | 1303 | perror("[error] Error receiving get_new_streams response"); |
2acdc547 | 1304 | ret = ret_len; |
6192b988 JD |
1305 | goto error; |
1306 | } | |
2acdc547 JD |
1307 | assert(ret_len == sizeof(rp)); |
1308 | ||
1309 | switch(be32toh(rp.status)) { | |
1310 | case LTTNG_VIEWER_NEW_STREAMS_OK: | |
1311 | break; | |
1312 | case LTTNG_VIEWER_NEW_STREAMS_NO_NEW: | |
1313 | ret = 0; | |
1314 | goto end; | |
1315 | case LTTNG_VIEWER_NEW_STREAMS_HUP: | |
1316 | ret = -LTTNG_VIEWER_NEW_STREAMS_HUP; | |
1317 | goto end; | |
1318 | case LTTNG_VIEWER_NEW_STREAMS_ERR: | |
1319 | fprintf(stderr, "[error] get_new_streams error\n"); | |
1320 | ret = -1; | |
1321 | goto end; | |
1322 | default: | |
1323 | fprintf(stderr, "[error] Unknown return code %u\n", | |
1324 | be32toh(rp.status)); | |
1325 | ret = -1; | |
1326 | goto end; | |
1327 | } | |
1328 | ||
b5a1fa45 JD |
1329 | stream_count = be32toh(rp.streams_count); |
1330 | ctx->session->stream_count += stream_count; | |
2acdc547 JD |
1331 | /* |
1332 | * When the session is created but not started, we do an active wait | |
1333 | * until it starts. It allows the viewer to start processing the trace | |
1334 | * as soon as the session starts. | |
1335 | */ | |
1336 | if (ctx->session->stream_count == 0) { | |
1337 | ret = 0; | |
1338 | goto end; | |
1339 | } | |
1340 | printf_verbose("Waiting for %" PRIu64 " streams:\n", | |
1341 | ctx->session->stream_count); | |
1342 | ctx->session->streams = g_new0(struct lttng_live_viewer_stream, | |
1343 | ctx->session->stream_count); | |
b5a1fa45 | 1344 | for (i = 0; i < stream_count; i++) { |
2acdc547 JD |
1345 | do { |
1346 | ret_len = recv(ctx->control_sock, &stream, sizeof(stream), 0); | |
1347 | } while (ret_len < 0 && errno == EINTR); | |
f8612f31 MD |
1348 | if (ret_len == 0) { |
1349 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
1350 | ret = -1; | |
1351 | goto error; | |
1352 | } | |
2acdc547 | 1353 | if (ret_len < 0) { |
79620497 | 1354 | perror("[error] Error receiving stream"); |
2acdc547 JD |
1355 | ret = ret_len; |
1356 | goto error; | |
1357 | } | |
1358 | assert(ret_len == sizeof(stream)); | |
1359 | stream.path_name[LTTNG_VIEWER_PATH_MAX - 1] = '\0'; | |
1360 | stream.channel_name[LTTNG_VIEWER_NAME_MAX - 1] = '\0'; | |
1361 | ||
1362 | printf_verbose(" stream %" PRIu64 " : %s/%s\n", | |
1363 | be64toh(stream.id), stream.path_name, | |
1364 | stream.channel_name); | |
1365 | ctx->session->streams[i].id = be64toh(stream.id); | |
1366 | ctx->session->streams[i].session = ctx->session; | |
1367 | ||
1368 | ctx->session->streams[i].first_read = 1; | |
1369 | ctx->session->streams[i].mmap_size = 0; | |
1370 | ||
1371 | if (be32toh(stream.metadata_flag)) { | |
1372 | char *path; | |
1373 | ||
1374 | path = strdup(LTTNG_METADATA_PATH_TEMPLATE); | |
1375 | if (!path) { | |
1376 | perror("strdup"); | |
1377 | ret = -1; | |
1378 | goto error; | |
1379 | } | |
1380 | if (!mkdtemp(path)) { | |
1381 | perror("mkdtemp"); | |
1382 | free(path); | |
1383 | ret = -1; | |
1384 | goto error; | |
1385 | } | |
1386 | ctx->session->streams[i].metadata_flag = 1; | |
1387 | snprintf(ctx->session->streams[i].path, | |
1388 | sizeof(ctx->session->streams[i].path), | |
1389 | "%s/%s", path, | |
1390 | stream.channel_name); | |
1391 | ret = open(ctx->session->streams[i].path, | |
1392 | O_WRONLY | O_CREAT | O_TRUNC, | |
1393 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
1394 | if (ret < 0) { | |
1395 | perror("open"); | |
1396 | free(path); | |
1397 | goto error; | |
1398 | } | |
1399 | ctx->session->streams[i].fd = ret; | |
1400 | free(path); | |
1401 | } | |
1402 | ret = lttng_live_ctf_trace_assign(&ctx->session->streams[i], | |
1403 | be64toh(stream.ctf_trace_id)); | |
1404 | if (ret < 0) { | |
1405 | goto error; | |
1406 | } | |
1407 | ||
1408 | } | |
6192b988 JD |
1409 | ret = 0; |
1410 | ||
2acdc547 | 1411 | end: |
6192b988 JD |
1412 | error: |
1413 | return ret; | |
1414 | } | |
1415 | ||
2acdc547 | 1416 | void lttng_live_read(struct lttng_live_ctx *ctx) |
4a744367 | 1417 | { |
2acdc547 | 1418 | int ret, i; |
4a744367 JD |
1419 | struct bt_ctf_iter *iter; |
1420 | const struct bt_ctf_event *event; | |
1421 | struct bt_iter_pos begin_pos; | |
1422 | struct bt_trace_descriptor *td_write; | |
1423 | struct bt_format *fmt_write; | |
1424 | struct ctf_text_stream_pos *sout; | |
2acdc547 | 1425 | uint64_t id; |
4a744367 | 1426 | |
2acdc547 JD |
1427 | ctx->bt_ctx = bt_context_create(); |
1428 | if (!ctx->bt_ctx) { | |
4a744367 JD |
1429 | fprintf(stderr, "[error] bt_context_create allocation\n"); |
1430 | goto end; | |
1431 | } | |
1432 | ||
1433 | fmt_write = bt_lookup_format(g_quark_from_static_string("text")); | |
1434 | if (!fmt_write) { | |
1435 | fprintf(stderr, "[error] ctf-text error\n"); | |
1436 | goto end; | |
1437 | } | |
1438 | ||
1439 | td_write = fmt_write->open_trace(NULL, O_RDWR, NULL, NULL); | |
1440 | if (!td_write) { | |
1441 | fprintf(stderr, "[error] Error opening output trace\n"); | |
1442 | goto end_free; | |
1443 | } | |
1444 | ||
1445 | sout = container_of(td_write, struct ctf_text_stream_pos, | |
1446 | trace_descriptor); | |
1447 | if (!sout->parent.event_cb) | |
1448 | goto end_free; | |
1449 | ||
6192b988 JD |
1450 | ret = lttng_live_create_viewer_session(ctx); |
1451 | if (ret < 0) { | |
1452 | goto end_free; | |
1453 | } | |
1454 | ||
2acdc547 JD |
1455 | for (i = 0; i < ctx->session_ids->len; i++) { |
1456 | id = g_array_index(ctx->session_ids, uint64_t, i); | |
1457 | printf_verbose("Attaching to session %lu\n", id); | |
1458 | ret = lttng_live_attach_session(ctx, id); | |
1459 | printf_verbose("Attaching session returns %d\n", ret); | |
1460 | if (ret < 0) { | |
1461 | if (ret == -LTTNG_VIEWER_ATTACH_UNK) { | |
1462 | fprintf(stderr, "[error] Unknown session ID\n"); | |
1463 | } | |
1464 | goto end_free; | |
1465 | } | |
1466 | } | |
1467 | ||
4a744367 | 1468 | /* |
2acdc547 | 1469 | * As long as the session is active, we try to get new streams. |
4a744367 | 1470 | */ |
2acdc547 | 1471 | for (;;) { |
4a744367 JD |
1472 | int flags; |
1473 | ||
2acdc547 JD |
1474 | while (!ctx->session->stream_count) { |
1475 | if (ctx->session_ids->len == 0) | |
4a744367 | 1476 | goto end_free; |
2acdc547 JD |
1477 | ret = ask_new_streams(ctx); |
1478 | if (ret < 0) | |
1479 | goto end_free; | |
1480 | } | |
4a744367 | 1481 | |
2acdc547 JD |
1482 | g_hash_table_foreach(ctx->session->ctf_traces, add_traces, |
1483 | ctx->bt_ctx); | |
4a744367 JD |
1484 | |
1485 | begin_pos.type = BT_SEEK_BEGIN; | |
2acdc547 | 1486 | iter = bt_ctf_iter_create(ctx->bt_ctx, &begin_pos, NULL); |
4a744367 JD |
1487 | if (!iter) { |
1488 | fprintf(stderr, "[error] Iterator creation error\n"); | |
1489 | goto end; | |
1490 | } | |
1491 | for (;;) { | |
1492 | event = bt_ctf_iter_read_event_flags(iter, &flags); | |
1493 | if (!(flags & BT_ITER_FLAG_RETRY)) { | |
1494 | if (!event) { | |
1495 | /* End of trace */ | |
1496 | break; | |
1497 | } | |
1498 | ret = sout->parent.event_cb(&sout->parent, | |
1499 | event->parent->stream); | |
1500 | if (ret) { | |
1501 | fprintf(stderr, "[error] Writing " | |
1502 | "event failed.\n"); | |
1503 | goto end_free; | |
1504 | } | |
1505 | } | |
1506 | ret = bt_iter_next(bt_ctf_get_iter(iter)); | |
1507 | if (ret < 0) { | |
1508 | goto end_free; | |
1509 | } | |
1510 | } | |
1511 | bt_ctf_iter_destroy(iter); | |
2acdc547 JD |
1512 | g_hash_table_foreach_remove(ctx->session->ctf_traces, |
1513 | del_traces, ctx->bt_ctx); | |
1514 | ctx->session->stream_count = 0; | |
1515 | } | |
4a744367 JD |
1516 | |
1517 | end_free: | |
2acdc547 | 1518 | bt_context_put(ctx->bt_ctx); |
4a744367 JD |
1519 | end: |
1520 | return; | |
1521 | } |