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 | ||
af701dc4 JD |
52 | #include <babeltrace/compat/memstream.h> |
53 | ||
c98627ca | 54 | #include "lttng-live.h" |
158eea6e | 55 | #include "lttng-viewer-abi.h" |
4a744367 JD |
56 | |
57 | /* | |
58 | * Memory allocation zeroed | |
59 | */ | |
60 | #define zmalloc(x) calloc(1, x) | |
61 | ||
62 | #ifndef max_t | |
63 | #define max_t(type, a, b) \ | |
64 | ((type) (a) > (type) (b) ? (type) (a) : (type) (b)) | |
65 | #endif | |
66 | ||
b5a1fa45 JD |
67 | static void ctf_live_packet_seek(struct bt_stream_pos *stream_pos, |
68 | size_t index, int whence); | |
2acdc547 JD |
69 | static void add_traces(gpointer key, gpointer value, gpointer user_data); |
70 | static int del_traces(gpointer key, gpointer value, gpointer user_data); | |
9abca178 | 71 | static int get_new_metadata(struct lttng_live_ctx *ctx, |
af701dc4 JD |
72 | struct lttng_live_viewer_stream *viewer_stream, |
73 | char **metadata_buf); | |
2acdc547 | 74 | |
b5a1fa45 | 75 | int lttng_live_connect_viewer(struct lttng_live_ctx *ctx) |
4a744367 JD |
76 | { |
77 | struct hostent *host; | |
78 | struct sockaddr_in server_addr; | |
79 | int ret; | |
80 | ||
b5a1fa45 | 81 | host = gethostbyname(ctx->relay_hostname); |
4a744367 JD |
82 | if (!host) { |
83 | ret = -1; | |
84 | goto end; | |
85 | } | |
86 | ||
87 | if ((ctx->control_sock = socket(AF_INET, SOCK_STREAM, 0)) == -1) { | |
88 | perror("Socket"); | |
89 | ret = -1; | |
90 | goto end; | |
91 | } | |
92 | ||
93 | server_addr.sin_family = AF_INET; | |
b5a1fa45 | 94 | server_addr.sin_port = htons(ctx->port); |
4a744367 JD |
95 | server_addr.sin_addr = *((struct in_addr *) host->h_addr); |
96 | bzero(&(server_addr.sin_zero), 8); | |
97 | ||
98 | if (connect(ctx->control_sock, (struct sockaddr *) &server_addr, | |
99 | sizeof(struct sockaddr)) == -1) { | |
100 | perror("Connect"); | |
101 | ret = -1; | |
102 | goto end; | |
103 | } | |
104 | ||
105 | ret = 0; | |
106 | ||
107 | end: | |
108 | return ret; | |
109 | } | |
110 | ||
111 | int lttng_live_establish_connection(struct lttng_live_ctx *ctx) | |
112 | { | |
113 | struct lttng_viewer_cmd cmd; | |
114 | struct lttng_viewer_connect connect; | |
115 | int ret; | |
116 | ssize_t ret_len; | |
117 | ||
118 | cmd.cmd = htobe32(LTTNG_VIEWER_CONNECT); | |
119 | cmd.data_size = sizeof(connect); | |
120 | cmd.cmd_version = 0; | |
121 | ||
0c3cd7e1 | 122 | connect.viewer_session_id = -1ULL; /* will be set on recv */ |
4a744367 JD |
123 | connect.major = htobe32(LTTNG_LIVE_MAJOR); |
124 | connect.minor = htobe32(LTTNG_LIVE_MINOR); | |
125 | connect.type = htobe32(LTTNG_VIEWER_CLIENT_COMMAND); | |
126 | ||
127 | do { | |
128 | ret_len = send(ctx->control_sock, &cmd, sizeof(cmd), 0); | |
129 | } while (ret_len < 0 && errno == EINTR); | |
130 | if (ret_len < 0) { | |
79620497 | 131 | perror("[error] Error sending cmd"); |
4a744367 JD |
132 | ret = ret_len; |
133 | goto error; | |
134 | } | |
135 | assert(ret_len == sizeof(cmd)); | |
136 | ||
137 | do { | |
138 | ret_len = send(ctx->control_sock, &connect, sizeof(connect), 0); | |
139 | } while (ret_len < 0 && errno == EINTR); | |
140 | if (ret_len < 0) { | |
79620497 | 141 | perror("[error] Error sending version"); |
4a744367 JD |
142 | ret = ret_len; |
143 | goto error; | |
144 | } | |
145 | assert(ret_len == sizeof(connect)); | |
146 | ||
147 | do { | |
148 | ret_len = recv(ctx->control_sock, &connect, sizeof(connect), 0); | |
149 | } while (ret_len < 0 && errno == EINTR); | |
f8612f31 MD |
150 | if (ret_len == 0) { |
151 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
152 | ret = -1; | |
153 | goto error; | |
154 | } | |
4a744367 | 155 | if (ret_len < 0) { |
79620497 | 156 | perror("[error] Error receiving version"); |
4a744367 JD |
157 | ret = ret_len; |
158 | goto error; | |
159 | } | |
160 | assert(ret_len == sizeof(connect)); | |
161 | ||
162 | printf_verbose("Received viewer session ID : %" PRIu64 "\n", | |
163 | be64toh(connect.viewer_session_id)); | |
164 | printf_verbose("Relayd version : %u.%u\n", be32toh(connect.major), | |
165 | be32toh(connect.minor)); | |
166 | ||
167 | ret = 0; | |
168 | ||
169 | error: | |
170 | return ret; | |
171 | } | |
172 | ||
b5a1fa45 JD |
173 | static |
174 | void free_session_list(GPtrArray *session_list) | |
175 | { | |
176 | int i; | |
177 | struct lttng_live_relay_session *relay_session; | |
178 | ||
179 | for (i = 0; i < session_list->len; i++) { | |
180 | relay_session = g_ptr_array_index(session_list, i); | |
181 | free(relay_session->name); | |
182 | free(relay_session->hostname); | |
183 | } | |
184 | g_ptr_array_free(session_list, TRUE); | |
185 | } | |
186 | ||
187 | static | |
188 | void print_session_list(GPtrArray *session_list, const char *path) | |
189 | { | |
190 | int i; | |
191 | struct lttng_live_relay_session *relay_session; | |
192 | ||
193 | for (i = 0; i < session_list->len; i++) { | |
194 | relay_session = g_ptr_array_index(session_list, i); | |
195 | fprintf(stdout, "%s/host/%s/%s (timer = %u, " | |
196 | "%u stream(s), %u client(s) connected)\n", | |
197 | path, relay_session->hostname, | |
198 | relay_session->name, relay_session->timer, | |
199 | relay_session->streams, relay_session->clients); | |
200 | } | |
201 | } | |
202 | ||
203 | static | |
204 | void update_session_list(GPtrArray *session_list, char *hostname, | |
205 | char *session_name, uint32_t streams, uint32_t clients, | |
206 | uint32_t timer) | |
207 | { | |
208 | int i, found = 0; | |
209 | struct lttng_live_relay_session *relay_session; | |
210 | ||
211 | for (i = 0; i < session_list->len; i++) { | |
212 | relay_session = g_ptr_array_index(session_list, i); | |
213 | if ((strncmp(relay_session->hostname, hostname, NAME_MAX) == 0) && | |
214 | strncmp(relay_session->name, | |
215 | session_name, NAME_MAX) == 0) { | |
216 | relay_session->streams += streams; | |
217 | if (relay_session->clients < clients) | |
218 | relay_session->clients = clients; | |
219 | found = 1; | |
220 | break; | |
221 | } | |
222 | } | |
223 | if (found) | |
224 | return; | |
225 | ||
226 | relay_session = g_new0(struct lttng_live_relay_session, 1); | |
227 | relay_session->hostname = strndup(hostname, NAME_MAX); | |
228 | relay_session->name = strndup(session_name, NAME_MAX); | |
229 | relay_session->clients = clients; | |
230 | relay_session->streams = streams; | |
231 | relay_session->timer = timer; | |
232 | g_ptr_array_add(session_list, relay_session); | |
233 | } | |
234 | ||
4a744367 JD |
235 | int lttng_live_list_sessions(struct lttng_live_ctx *ctx, const char *path) |
236 | { | |
237 | struct lttng_viewer_cmd cmd; | |
238 | struct lttng_viewer_list_sessions list; | |
239 | struct lttng_viewer_session lsession; | |
b5a1fa45 | 240 | int i, ret, sessions_count, print_list = 0; |
4a744367 | 241 | ssize_t ret_len; |
b5a1fa45 JD |
242 | uint64_t session_id; |
243 | GPtrArray *session_list = NULL; | |
244 | ||
245 | if (strlen(ctx->session_name) == 0) { | |
246 | print_list = 1; | |
247 | session_list = g_ptr_array_new(); | |
248 | } | |
4a744367 JD |
249 | |
250 | cmd.cmd = htobe32(LTTNG_VIEWER_LIST_SESSIONS); | |
251 | cmd.data_size = 0; | |
252 | cmd.cmd_version = 0; | |
253 | ||
254 | do { | |
255 | ret_len = send(ctx->control_sock, &cmd, sizeof(cmd), 0); | |
256 | } while (ret_len < 0 && errno == EINTR); | |
257 | if (ret_len < 0) { | |
79620497 | 258 | perror("[error] Error sending cmd"); |
4a744367 JD |
259 | ret = ret_len; |
260 | goto error; | |
261 | } | |
262 | assert(ret_len == sizeof(cmd)); | |
263 | ||
264 | do { | |
265 | ret_len = recv(ctx->control_sock, &list, sizeof(list), 0); | |
266 | } while (ret_len < 0 && errno == EINTR); | |
f8612f31 MD |
267 | if (ret_len == 0) { |
268 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
269 | ret = -1; | |
270 | goto error; | |
271 | } | |
4a744367 | 272 | if (ret_len < 0) { |
79620497 | 273 | perror("[error] Error receiving session list"); |
4a744367 JD |
274 | ret = ret_len; |
275 | goto error; | |
276 | } | |
277 | assert(ret_len == sizeof(list)); | |
278 | ||
279 | sessions_count = be32toh(list.sessions_count); | |
4a744367 JD |
280 | for (i = 0; i < sessions_count; i++) { |
281 | do { | |
282 | ret_len = recv(ctx->control_sock, &lsession, sizeof(lsession), 0); | |
283 | } while (ret_len < 0 && errno == EINTR); | |
f8612f31 MD |
284 | if (ret_len == 0) { |
285 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
286 | ret = -1; | |
287 | goto error; | |
288 | } | |
4a744367 | 289 | if (ret_len < 0) { |
79620497 | 290 | perror("[error] Error receiving session"); |
4a744367 JD |
291 | ret = ret_len; |
292 | goto error; | |
293 | } | |
294 | assert(ret_len == sizeof(lsession)); | |
9ed31e53 MD |
295 | lsession.hostname[LTTNG_VIEWER_HOST_NAME_MAX - 1] = '\0'; |
296 | lsession.session_name[LTTNG_VIEWER_NAME_MAX - 1] = '\0'; | |
b5a1fa45 JD |
297 | session_id = be64toh(lsession.id); |
298 | ||
299 | if (print_list) { | |
300 | update_session_list(session_list, | |
301 | lsession.hostname, | |
302 | lsession.session_name, | |
303 | be32toh(lsession.streams), | |
304 | be32toh(lsession.clients), | |
305 | be32toh(lsession.live_timer)); | |
306 | } else { | |
307 | if ((strncmp(lsession.session_name, ctx->session_name, | |
308 | NAME_MAX) == 0) && (strncmp(lsession.hostname, | |
309 | ctx->traced_hostname, NAME_MAX) == 0)) { | |
310 | printf_verbose("Reading from session %" PRIu64 "\n", | |
311 | session_id); | |
312 | g_array_append_val(ctx->session_ids, | |
313 | session_id); | |
314 | } | |
315 | } | |
316 | } | |
4a744367 | 317 | |
b5a1fa45 JD |
318 | if (print_list) { |
319 | print_session_list(session_list, path); | |
320 | free_session_list(session_list); | |
4a744367 JD |
321 | } |
322 | ||
323 | ret = 0; | |
324 | ||
325 | error: | |
326 | return ret; | |
327 | } | |
328 | ||
329 | int lttng_live_ctf_trace_assign(struct lttng_live_viewer_stream *stream, | |
330 | uint64_t ctf_trace_id) | |
331 | { | |
332 | struct lttng_live_ctf_trace *trace; | |
333 | int ret = 0; | |
334 | ||
335 | trace = g_hash_table_lookup(stream->session->ctf_traces, | |
336 | (gpointer) ctf_trace_id); | |
337 | if (!trace) { | |
338 | trace = g_new0(struct lttng_live_ctf_trace, 1); | |
4a744367 JD |
339 | trace->ctf_trace_id = ctf_trace_id; |
340 | trace->streams = g_ptr_array_new(); | |
341 | g_hash_table_insert(stream->session->ctf_traces, | |
342 | (gpointer) ctf_trace_id, | |
343 | trace); | |
344 | } | |
345 | if (stream->metadata_flag) | |
346 | trace->metadata_stream = stream; | |
347 | ||
348 | stream->ctf_trace = trace; | |
349 | g_ptr_array_add(trace->streams, stream); | |
350 | ||
4a744367 JD |
351 | return ret; |
352 | } | |
353 | ||
af701dc4 JD |
354 | static |
355 | int open_metadata_fp_write(struct lttng_live_viewer_stream *stream, | |
356 | char **metadata_buf, size_t *size) | |
357 | { | |
358 | int ret = 0; | |
359 | ||
360 | stream->metadata_fp_write = | |
361 | babeltrace_open_memstream(metadata_buf, size); | |
362 | if (!stream->metadata_fp_write) { | |
363 | perror("Metadata open_memstream"); | |
364 | ret = -1; | |
365 | } | |
366 | ||
367 | return ret; | |
368 | } | |
369 | ||
4a744367 JD |
370 | int lttng_live_attach_session(struct lttng_live_ctx *ctx, uint64_t id) |
371 | { | |
372 | struct lttng_viewer_cmd cmd; | |
373 | struct lttng_viewer_attach_session_request rq; | |
374 | struct lttng_viewer_attach_session_response rp; | |
375 | struct lttng_viewer_stream stream; | |
376 | int ret, i; | |
377 | ssize_t ret_len; | |
378 | ||
379 | cmd.cmd = htobe32(LTTNG_VIEWER_ATTACH_SESSION); | |
380 | cmd.data_size = sizeof(rq); | |
381 | cmd.cmd_version = 0; | |
382 | ||
383 | memset(&rq, 0, sizeof(rq)); | |
384 | rq.session_id = htobe64(id); | |
385 | // TODO: add cmd line parameter to select seek beginning | |
386 | // rq.seek = htobe32(LTTNG_VIEWER_SEEK_BEGINNING); | |
387 | rq.seek = htobe32(LTTNG_VIEWER_SEEK_LAST); | |
388 | ||
389 | do { | |
390 | ret_len = send(ctx->control_sock, &cmd, sizeof(cmd), 0); | |
391 | } while (ret_len < 0 && errno == EINTR); | |
392 | if (ret_len < 0) { | |
79620497 | 393 | perror("[error] Error sending cmd"); |
4a744367 JD |
394 | ret = ret_len; |
395 | goto error; | |
396 | } | |
397 | assert(ret_len == sizeof(cmd)); | |
398 | ||
399 | do { | |
400 | ret_len = send(ctx->control_sock, &rq, sizeof(rq), 0); | |
401 | } while (ret_len < 0 && errno == EINTR); | |
402 | if (ret_len < 0) { | |
79620497 | 403 | perror("[error] Error sending attach request"); |
4a744367 JD |
404 | ret = ret_len; |
405 | goto error; | |
406 | } | |
407 | assert(ret_len == sizeof(rq)); | |
408 | ||
409 | do { | |
410 | ret_len = recv(ctx->control_sock, &rp, sizeof(rp), 0); | |
411 | } while (ret_len < 0 && errno == EINTR); | |
f8612f31 MD |
412 | if (ret_len == 0) { |
413 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
414 | ret = -1; | |
415 | goto error; | |
416 | } | |
4a744367 | 417 | if (ret_len < 0) { |
79620497 | 418 | perror("[error] Error receiving attach response"); |
4a744367 JD |
419 | ret = ret_len; |
420 | goto error; | |
421 | } | |
422 | assert(ret_len == sizeof(rp)); | |
423 | ||
424 | switch(be32toh(rp.status)) { | |
425 | case LTTNG_VIEWER_ATTACH_OK: | |
426 | break; | |
427 | case LTTNG_VIEWER_ATTACH_UNK: | |
428 | ret = -LTTNG_VIEWER_ATTACH_UNK; | |
429 | goto end; | |
430 | case LTTNG_VIEWER_ATTACH_ALREADY: | |
79620497 | 431 | fprintf(stderr, "[error] There is already a viewer attached to this session\n"); |
4a744367 JD |
432 | ret = -1; |
433 | goto end; | |
434 | case LTTNG_VIEWER_ATTACH_NOT_LIVE: | |
435 | fprintf(stderr, "[error] Not a live session\n"); | |
436 | ret = -1; | |
437 | goto end; | |
438 | case LTTNG_VIEWER_ATTACH_SEEK_ERR: | |
439 | fprintf(stderr, "[error] Wrong seek parameter\n"); | |
440 | ret = -1; | |
441 | goto end; | |
442 | default: | |
443 | fprintf(stderr, "[error] Unknown attach return code %u\n", | |
444 | be32toh(rp.status)); | |
445 | ret = -1; | |
446 | goto end; | |
447 | } | |
448 | if (be32toh(rp.status) != LTTNG_VIEWER_ATTACH_OK) { | |
449 | ret = -1; | |
450 | goto end; | |
451 | } | |
452 | ||
2acdc547 | 453 | ctx->session->stream_count += be32toh(rp.streams_count); |
4a744367 JD |
454 | /* |
455 | * When the session is created but not started, we do an active wait | |
456 | * until it starts. It allows the viewer to start processing the trace | |
457 | * as soon as the session starts. | |
458 | */ | |
459 | if (ctx->session->stream_count == 0) { | |
460 | ret = 0; | |
461 | goto end; | |
462 | } | |
463 | printf_verbose("Waiting for %" PRIu64 " streams:\n", | |
464 | ctx->session->stream_count); | |
465 | ctx->session->streams = g_new0(struct lttng_live_viewer_stream, | |
466 | ctx->session->stream_count); | |
4a744367 JD |
467 | for (i = 0; i < be32toh(rp.streams_count); i++) { |
468 | do { | |
469 | ret_len = recv(ctx->control_sock, &stream, sizeof(stream), 0); | |
470 | } while (ret_len < 0 && errno == EINTR); | |
f8612f31 MD |
471 | if (ret_len == 0) { |
472 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
473 | ret = -1; | |
474 | goto error; | |
475 | } | |
4a744367 | 476 | if (ret_len < 0) { |
79620497 | 477 | perror("[error] Error receiving stream"); |
4a744367 JD |
478 | ret = ret_len; |
479 | goto error; | |
480 | } | |
481 | assert(ret_len == sizeof(stream)); | |
9ed31e53 MD |
482 | stream.path_name[LTTNG_VIEWER_PATH_MAX - 1] = '\0'; |
483 | stream.channel_name[LTTNG_VIEWER_NAME_MAX - 1] = '\0'; | |
4a744367 JD |
484 | |
485 | printf_verbose(" stream %" PRIu64 " : %s/%s\n", | |
486 | be64toh(stream.id), stream.path_name, | |
487 | stream.channel_name); | |
488 | ctx->session->streams[i].id = be64toh(stream.id); | |
489 | ctx->session->streams[i].session = ctx->session; | |
490 | ||
491 | ctx->session->streams[i].first_read = 1; | |
492 | ctx->session->streams[i].mmap_size = 0; | |
493 | ||
494 | if (be32toh(stream.metadata_flag)) { | |
4a744367 | 495 | ctx->session->streams[i].metadata_flag = 1; |
4a744367 JD |
496 | } |
497 | ret = lttng_live_ctf_trace_assign(&ctx->session->streams[i], | |
498 | be64toh(stream.ctf_trace_id)); | |
499 | if (ret < 0) { | |
500 | goto error; | |
501 | } | |
502 | ||
503 | } | |
504 | ret = 0; | |
505 | ||
506 | end: | |
507 | error: | |
508 | return ret; | |
509 | } | |
510 | ||
2acdc547 JD |
511 | static |
512 | int ask_new_streams(struct lttng_live_ctx *ctx) | |
513 | { | |
514 | int i, ret = 0; | |
515 | uint64_t id; | |
516 | ||
517 | restart: | |
518 | for (i = 0; i < ctx->session_ids->len; i++) { | |
519 | id = g_array_index(ctx->session_ids, uint64_t, i); | |
520 | ret = lttng_live_get_new_streams(ctx, id); | |
521 | printf_verbose("Asking for new streams returns %d\n", | |
522 | ret); | |
523 | if (ret < 0) { | |
524 | if (ret == -LTTNG_VIEWER_NEW_STREAMS_HUP) { | |
525 | printf_verbose("Session %" PRIu64 " closed\n", | |
526 | id); | |
b5a1fa45 JD |
527 | /* |
528 | * The streams have already been closed during | |
529 | * the reading, so we only need to get rid of | |
530 | * the trace in our internal table of sessions. | |
531 | */ | |
2acdc547 JD |
532 | g_array_remove_index(ctx->session_ids, i); |
533 | /* | |
534 | * We can't continue iterating on the g_array | |
535 | * after a remove, we have to start again. | |
536 | */ | |
537 | goto restart; | |
538 | } else { | |
539 | ret = -1; | |
540 | goto end; | |
541 | } | |
542 | } | |
543 | } | |
544 | ||
545 | end: | |
546 | return ret; | |
547 | } | |
548 | ||
50d207af JD |
549 | static |
550 | int append_metadata(struct lttng_live_ctx *ctx, | |
551 | struct lttng_live_viewer_stream *viewer_stream) | |
552 | { | |
553 | int ret; | |
554 | struct lttng_live_viewer_stream *metadata; | |
555 | char *metadata_buf = NULL; | |
556 | ||
557 | printf_verbose("get_next_index: new metadata needed\n"); | |
558 | ret = get_new_metadata(ctx, viewer_stream, &metadata_buf); | |
559 | if (ret < 0) { | |
560 | free(metadata_buf); | |
561 | goto error; | |
562 | } | |
563 | ||
564 | metadata = viewer_stream->ctf_trace->metadata_stream; | |
565 | metadata->ctf_trace->metadata_fp = | |
566 | babeltrace_fmemopen(metadata_buf, | |
567 | metadata->metadata_len, "rb"); | |
568 | if (!metadata->ctf_trace->metadata_fp) { | |
569 | perror("Metadata fmemopen"); | |
570 | free(metadata_buf); | |
571 | ret = -1; | |
572 | goto error; | |
573 | } | |
574 | ret = ctf_append_trace_metadata( | |
575 | viewer_stream->ctf_trace->handle->td, | |
576 | metadata->ctf_trace->metadata_fp); | |
577 | if (ret != 0) { | |
578 | fprintf(stderr, "[error] Appending metadata\n"); | |
579 | goto error; | |
580 | } | |
581 | ||
582 | error: | |
583 | return ret; | |
584 | } | |
585 | ||
4a744367 JD |
586 | static |
587 | int get_data_packet(struct lttng_live_ctx *ctx, | |
588 | struct ctf_stream_pos *pos, | |
589 | struct lttng_live_viewer_stream *stream, uint64_t offset, | |
590 | uint64_t len) | |
591 | { | |
592 | struct lttng_viewer_cmd cmd; | |
593 | struct lttng_viewer_get_packet rq; | |
594 | struct lttng_viewer_trace_packet rp; | |
595 | ssize_t ret_len; | |
596 | int ret; | |
597 | ||
50d207af | 598 | retry: |
4a744367 JD |
599 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_PACKET); |
600 | cmd.data_size = sizeof(rq); | |
601 | cmd.cmd_version = 0; | |
602 | ||
603 | memset(&rq, 0, sizeof(rq)); | |
604 | rq.stream_id = htobe64(stream->id); | |
605 | /* Already in big endian. */ | |
606 | rq.offset = offset; | |
607 | rq.len = htobe32(len); | |
608 | ||
609 | do { | |
610 | ret_len = send(ctx->control_sock, &cmd, sizeof(cmd), 0); | |
611 | } while (ret_len < 0 && errno == EINTR); | |
612 | if (ret_len < 0) { | |
79620497 | 613 | perror("[error] Error sending cmd"); |
4a744367 JD |
614 | ret = ret_len; |
615 | goto error; | |
616 | } | |
617 | assert(ret_len == sizeof(cmd)); | |
618 | ||
619 | do { | |
620 | ret_len = send(ctx->control_sock, &rq, sizeof(rq), 0); | |
621 | } while (ret_len < 0 && errno == EINTR); | |
622 | if (ret_len < 0) { | |
79620497 | 623 | perror("[error] Error sending get_data_packet request"); |
4a744367 JD |
624 | ret = ret_len; |
625 | goto error; | |
626 | } | |
627 | assert(ret_len == sizeof(rq)); | |
628 | ||
629 | do { | |
630 | ret_len = recv(ctx->control_sock, &rp, sizeof(rp), 0); | |
631 | } while (ret_len < 0 && errno == EINTR); | |
f8612f31 MD |
632 | if (ret_len == 0) { |
633 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
634 | ret = -1; | |
635 | goto error; | |
636 | } | |
4a744367 | 637 | if (ret_len < 0) { |
79620497 | 638 | perror("[error] Error receiving data response"); |
4a744367 JD |
639 | ret = ret_len; |
640 | goto error; | |
641 | } | |
57b9d843 JD |
642 | if (ret_len != sizeof(rp)) { |
643 | fprintf(stderr, "[error] get_data_packet: expected %" PRId64 | |
644 | ", received %" PRId64 "\n", ret_len, | |
645 | sizeof(rp)); | |
646 | ret = -1; | |
647 | goto error; | |
648 | } | |
4a744367 JD |
649 | |
650 | rp.flags = be32toh(rp.flags); | |
651 | ||
652 | switch (be32toh(rp.status)) { | |
653 | case LTTNG_VIEWER_GET_PACKET_OK: | |
654 | len = be32toh(rp.len); | |
655 | printf_verbose("get_data_packet: Ok, packet size : %" PRIu64 | |
656 | "\n", len); | |
657 | break; | |
658 | case LTTNG_VIEWER_GET_PACKET_RETRY: | |
659 | printf_verbose("get_data_packet: retry\n"); | |
660 | ret = -1; | |
661 | goto end; | |
662 | case LTTNG_VIEWER_GET_PACKET_ERR: | |
663 | if (rp.flags & LTTNG_VIEWER_FLAG_NEW_METADATA) { | |
664 | printf_verbose("get_data_packet: new metadata needed\n"); | |
50d207af JD |
665 | ret = append_metadata(ctx, stream); |
666 | if (ret) | |
667 | goto error; | |
668 | goto retry; | |
4a744367 | 669 | } |
2acdc547 JD |
670 | if (rp.flags & LTTNG_VIEWER_FLAG_NEW_STREAM) { |
671 | ret = ask_new_streams(ctx); | |
672 | if (ret < 0) | |
673 | goto error; | |
674 | g_hash_table_foreach(ctx->session->ctf_traces, add_traces, | |
675 | ctx->bt_ctx); | |
676 | } | |
4a744367 JD |
677 | fprintf(stderr, "[error] get_data_packet: error\n"); |
678 | ret = -1; | |
679 | goto end; | |
680 | case LTTNG_VIEWER_GET_PACKET_EOF: | |
681 | ret = -2; | |
682 | goto error; | |
683 | default: | |
684 | printf_verbose("get_data_packet: unknown\n"); | |
685 | assert(0); | |
686 | ret = -1; | |
687 | goto end; | |
688 | } | |
689 | ||
690 | if (len <= 0) { | |
691 | ret = -1; | |
692 | goto end; | |
693 | } | |
694 | ||
695 | if (len > stream->mmap_size) { | |
696 | uint64_t new_size; | |
697 | ||
698 | new_size = max_t(uint64_t, len, stream->mmap_size << 1); | |
699 | if (pos->base_mma) { | |
700 | /* unmap old base */ | |
701 | ret = munmap_align(pos->base_mma); | |
702 | if (ret) { | |
79620497 | 703 | perror("[error] Unable to unmap old base"); |
4a744367 JD |
704 | ret = -1; |
705 | goto error; | |
706 | } | |
707 | pos->base_mma = NULL; | |
708 | } | |
709 | pos->base_mma = mmap_align(new_size, | |
710 | PROT_READ | PROT_WRITE, | |
711 | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); | |
712 | if (pos->base_mma == MAP_FAILED) { | |
79620497 | 713 | perror("[error] mmap error"); |
4a744367 JD |
714 | pos->base_mma = NULL; |
715 | ret = -1; | |
716 | goto error; | |
717 | } | |
718 | ||
719 | stream->mmap_size = new_size; | |
720 | printf_verbose("Expanding stream mmap size to %" PRIu64 " bytes\n", | |
721 | stream->mmap_size); | |
722 | } | |
723 | ||
724 | do { | |
725 | ret_len = recv(ctx->control_sock, | |
726 | mmap_align_addr(pos->base_mma), len, | |
727 | MSG_WAITALL); | |
728 | } while (ret_len < 0 && errno == EINTR); | |
f8612f31 MD |
729 | if (ret_len == 0) { |
730 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
731 | ret = -1; | |
732 | goto error; | |
733 | } | |
4a744367 | 734 | if (ret_len < 0) { |
79620497 | 735 | perror("[error] Error receiving trace packet"); |
4a744367 JD |
736 | ret = ret_len; |
737 | goto error; | |
738 | } | |
739 | assert(ret_len == len); | |
740 | ||
741 | end: | |
742 | error: | |
743 | return ret; | |
744 | } | |
745 | ||
4a744367 | 746 | static |
9abca178 JD |
747 | int get_one_metadata_packet(struct lttng_live_ctx *ctx, |
748 | struct lttng_live_viewer_stream *metadata_stream) | |
4a744367 JD |
749 | { |
750 | uint64_t len = 0; | |
751 | int ret; | |
752 | struct lttng_viewer_cmd cmd; | |
753 | struct lttng_viewer_get_metadata rq; | |
754 | struct lttng_viewer_metadata_packet rp; | |
4a744367 JD |
755 | char *data = NULL; |
756 | ssize_t ret_len; | |
757 | ||
9abca178 | 758 | rq.stream_id = htobe64(metadata_stream->id); |
4a744367 JD |
759 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_METADATA); |
760 | cmd.data_size = sizeof(rq); | |
761 | cmd.cmd_version = 0; | |
762 | ||
4a744367 JD |
763 | do { |
764 | ret_len = send(ctx->control_sock, &cmd, sizeof(cmd), 0); | |
765 | } while (ret_len < 0 && errno == EINTR); | |
766 | if (ret_len < 0) { | |
79620497 | 767 | perror("[error] Error sending cmd"); |
4a744367 JD |
768 | ret = ret_len; |
769 | goto error; | |
770 | } | |
771 | assert(ret_len == sizeof(cmd)); | |
772 | ||
773 | do { | |
774 | ret_len = send(ctx->control_sock, &rq, sizeof(rq), 0); | |
775 | } while (ret_len < 0 && errno == EINTR); | |
776 | if (ret_len < 0) { | |
79620497 | 777 | perror("[error] Error sending get_metadata request"); |
4a744367 JD |
778 | ret = ret_len; |
779 | goto error; | |
780 | } | |
781 | assert(ret_len == sizeof(rq)); | |
782 | ||
783 | do { | |
784 | ret_len = recv(ctx->control_sock, &rp, sizeof(rp), 0); | |
785 | } while (ret_len < 0 && errno == EINTR); | |
f8612f31 MD |
786 | if (ret_len == 0) { |
787 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
788 | ret = -1; | |
789 | goto error; | |
790 | } | |
4a744367 | 791 | if (ret_len < 0) { |
79620497 | 792 | perror("[error] Error receiving metadata response"); |
4a744367 JD |
793 | ret = ret_len; |
794 | goto error; | |
795 | } | |
796 | assert(ret_len == sizeof(rp)); | |
797 | ||
798 | switch (be32toh(rp.status)) { | |
799 | case LTTNG_VIEWER_METADATA_OK: | |
800 | printf_verbose("get_metadata : OK\n"); | |
801 | break; | |
802 | case LTTNG_VIEWER_NO_NEW_METADATA: | |
803 | printf_verbose("get_metadata : NO NEW\n"); | |
9abca178 | 804 | ret = 0; |
4a744367 JD |
805 | goto end; |
806 | case LTTNG_VIEWER_METADATA_ERR: | |
807 | printf_verbose("get_metadata : ERR\n"); | |
808 | ret = -1; | |
809 | goto end; | |
810 | default: | |
811 | printf_verbose("get_metadata : UNKNOWN\n"); | |
812 | ret = -1; | |
813 | goto end; | |
814 | } | |
815 | ||
816 | len = be64toh(rp.len); | |
817 | printf_verbose("Writing %" PRIu64" bytes to metadata\n", len); | |
818 | if (len <= 0) { | |
819 | ret = -1; | |
820 | goto end; | |
821 | } | |
822 | ||
823 | data = zmalloc(len); | |
824 | if (!data) { | |
825 | perror("relay data zmalloc"); | |
826 | ret = -1; | |
827 | goto error; | |
828 | } | |
829 | do { | |
830 | ret_len = recv(ctx->control_sock, data, len, MSG_WAITALL); | |
831 | } while (ret_len < 0 && errno == EINTR); | |
f8612f31 MD |
832 | if (ret_len == 0) { |
833 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
834 | ret = -1; | |
835 | free(data); | |
836 | goto error; | |
837 | } | |
4a744367 | 838 | if (ret_len < 0) { |
79620497 | 839 | perror("[error] Error receiving trace packet"); |
4a744367 JD |
840 | ret = ret_len; |
841 | free(data); | |
842 | goto error; | |
843 | } | |
844 | assert(ret_len == len); | |
845 | ||
846 | do { | |
af701dc4 JD |
847 | ret_len = fwrite(data, 1, len, |
848 | metadata_stream->metadata_fp_write); | |
4a744367 JD |
849 | } while (ret_len < 0 && errno == EINTR); |
850 | if (ret_len < 0) { | |
af701dc4 | 851 | fprintf(stderr, "[error] Writing in the metadata fp\n"); |
4a744367 JD |
852 | free(data); |
853 | ret = ret_len; | |
854 | goto error; | |
855 | } | |
856 | assert(ret_len == len); | |
af701dc4 | 857 | metadata_stream->metadata_len += len; |
9abca178 | 858 | ret = len; |
4a744367 JD |
859 | |
860 | free(data); | |
861 | ||
4a744367 JD |
862 | end: |
863 | error: | |
864 | return ret; | |
865 | } | |
866 | ||
9abca178 JD |
867 | /* |
868 | * Return 0 on success, a negative value on error. | |
869 | */ | |
870 | static | |
871 | int get_new_metadata(struct lttng_live_ctx *ctx, | |
af701dc4 JD |
872 | struct lttng_live_viewer_stream *viewer_stream, |
873 | char **metadata_buf) | |
9abca178 JD |
874 | { |
875 | int ret = 0; | |
876 | struct lttng_live_viewer_stream *metadata_stream; | |
af701dc4 | 877 | size_t size; |
9abca178 JD |
878 | |
879 | metadata_stream = viewer_stream->ctf_trace->metadata_stream; | |
50d207af JD |
880 | if (!metadata_stream) { |
881 | fprintf(stderr, "[error] No metadata stream\n"); | |
882 | ret = -1; | |
883 | goto error; | |
884 | } | |
af701dc4 JD |
885 | metadata_stream->metadata_len = 0; |
886 | ret = open_metadata_fp_write(metadata_stream, metadata_buf, &size); | |
887 | if (ret < 0) { | |
888 | goto error; | |
889 | } | |
9abca178 JD |
890 | |
891 | do { | |
892 | /* | |
893 | * get_one_metadata_packet returns the number of bytes | |
894 | * received, 0 when we have received everything, a | |
895 | * negative value on error. | |
896 | */ | |
897 | ret = get_one_metadata_packet(ctx, metadata_stream); | |
898 | } while (ret > 0); | |
899 | ||
af701dc4 JD |
900 | fclose(metadata_stream->metadata_fp_write); |
901 | metadata_stream->metadata_fp_write = NULL; | |
902 | ||
903 | error: | |
9abca178 JD |
904 | return ret; |
905 | } | |
906 | ||
4a744367 JD |
907 | /* |
908 | * Get one index for a stream. | |
909 | * | |
910 | * Returns 0 on success or a negative value on error. | |
911 | */ | |
912 | static | |
913 | int get_next_index(struct lttng_live_ctx *ctx, | |
914 | struct lttng_live_viewer_stream *viewer_stream, | |
915 | struct packet_index *index) | |
916 | { | |
917 | struct lttng_viewer_cmd cmd; | |
918 | struct lttng_viewer_get_next_index rq; | |
919 | struct lttng_viewer_index rp; | |
920 | int ret; | |
4a744367 JD |
921 | ssize_t ret_len; |
922 | ||
923 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_NEXT_INDEX); | |
924 | cmd.data_size = sizeof(rq); | |
925 | cmd.cmd_version = 0; | |
926 | ||
927 | memset(&rq, 0, sizeof(rq)); | |
928 | rq.stream_id = htobe64(viewer_stream->id); | |
929 | ||
930 | retry: | |
931 | do { | |
932 | ret_len = send(ctx->control_sock, &cmd, sizeof(cmd), 0); | |
933 | } while (ret_len < 0 && errno == EINTR); | |
934 | if (ret_len < 0) { | |
79620497 | 935 | perror("[error] Error sending cmd"); |
4a744367 JD |
936 | ret = ret_len; |
937 | goto error; | |
938 | } | |
939 | assert(ret_len == sizeof(cmd)); | |
940 | ||
941 | do { | |
942 | ret_len = send(ctx->control_sock, &rq, sizeof(rq), 0); | |
943 | } while (ret_len < 0 && errno == EINTR); | |
944 | if (ret_len < 0) { | |
79620497 | 945 | perror("[error] Error sending get_next_index request"); |
4a744367 JD |
946 | ret = ret_len; |
947 | goto error; | |
948 | } | |
949 | assert(ret_len == sizeof(rq)); | |
950 | ||
951 | do { | |
952 | ret_len = recv(ctx->control_sock, &rp, sizeof(rp), 0); | |
953 | } while (ret_len < 0 && errno == EINTR); | |
f8612f31 MD |
954 | if (ret_len == 0) { |
955 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
956 | ret = -1; | |
957 | goto error; | |
958 | } | |
4a744367 | 959 | if (ret_len < 0) { |
79620497 | 960 | perror("[error] Error receiving index response"); |
4a744367 JD |
961 | ret = ret_len; |
962 | goto error; | |
963 | } | |
964 | assert(ret_len == sizeof(rp)); | |
965 | ||
966 | rp.flags = be32toh(rp.flags); | |
967 | ||
968 | switch (be32toh(rp.status)) { | |
969 | case LTTNG_VIEWER_INDEX_INACTIVE: | |
970 | printf_verbose("get_next_index: inactive\n"); | |
971 | memset(index, 0, sizeof(struct packet_index)); | |
992e8cc0 | 972 | index->ts_cycles.timestamp_end = be64toh(rp.timestamp_end); |
4a744367 JD |
973 | break; |
974 | case LTTNG_VIEWER_INDEX_OK: | |
975 | printf_verbose("get_next_index: Ok, need metadata update : %u\n", | |
976 | rp.flags & LTTNG_VIEWER_FLAG_NEW_METADATA); | |
977 | index->offset = be64toh(rp.offset); | |
978 | index->packet_size = be64toh(rp.packet_size); | |
979 | index->content_size = be64toh(rp.content_size); | |
992e8cc0 MD |
980 | index->ts_cycles.timestamp_begin = be64toh(rp.timestamp_begin); |
981 | index->ts_cycles.timestamp_end = be64toh(rp.timestamp_end); | |
4a744367 JD |
982 | index->events_discarded = be64toh(rp.events_discarded); |
983 | ||
984 | if (rp.flags & LTTNG_VIEWER_FLAG_NEW_METADATA) { | |
50d207af JD |
985 | ret = append_metadata(ctx, viewer_stream); |
986 | if (ret) | |
4a744367 | 987 | goto error; |
4a744367 | 988 | } |
2acdc547 JD |
989 | if (rp.flags & LTTNG_VIEWER_FLAG_NEW_STREAM) { |
990 | ret = ask_new_streams(ctx); | |
991 | if (ret < 0) | |
992 | goto error; | |
993 | g_hash_table_foreach(ctx->session->ctf_traces, add_traces, | |
994 | ctx->bt_ctx); | |
995 | } | |
4a744367 JD |
996 | break; |
997 | case LTTNG_VIEWER_INDEX_RETRY: | |
998 | printf_verbose("get_next_index: retry\n"); | |
999 | sleep(1); | |
1000 | goto retry; | |
1001 | case LTTNG_VIEWER_INDEX_HUP: | |
1002 | printf_verbose("get_next_index: stream hung up\n"); | |
1003 | viewer_stream->id = -1ULL; | |
4a744367 | 1004 | index->offset = EOF; |
2acdc547 | 1005 | ctx->session->stream_count--; |
4a744367 JD |
1006 | break; |
1007 | case LTTNG_VIEWER_INDEX_ERR: | |
1008 | fprintf(stderr, "[error] get_next_index: error\n"); | |
1009 | ret = -1; | |
1010 | goto error; | |
1011 | default: | |
1012 | fprintf(stderr, "[error] get_next_index: unkwown value\n"); | |
1013 | ret = -1; | |
1014 | goto error; | |
1015 | } | |
1016 | ||
1017 | ret = 0; | |
1018 | ||
1019 | error: | |
1020 | return ret; | |
1021 | } | |
1022 | ||
b5a1fa45 | 1023 | static |
4a744367 JD |
1024 | void ctf_live_packet_seek(struct bt_stream_pos *stream_pos, size_t index, |
1025 | int whence) | |
1026 | { | |
1027 | struct ctf_stream_pos *pos; | |
1028 | struct ctf_file_stream *file_stream; | |
f1f52630 | 1029 | struct packet_index *prev_index = NULL, *cur_index; |
4a744367 JD |
1030 | struct lttng_live_viewer_stream *viewer_stream; |
1031 | struct lttng_live_session *session; | |
1032 | int ret; | |
1033 | ||
1034 | retry: | |
1035 | pos = ctf_pos(stream_pos); | |
1036 | file_stream = container_of(pos, struct ctf_file_stream, pos); | |
1037 | viewer_stream = (struct lttng_live_viewer_stream *) pos->priv; | |
1038 | session = viewer_stream->session; | |
1039 | ||
f1f52630 MD |
1040 | switch (pos->packet_index->len) { |
1041 | case 0: | |
1042 | g_array_set_size(pos->packet_index, 1); | |
1043 | cur_index = &g_array_index(pos->packet_index, | |
1044 | struct packet_index, 0); | |
1045 | break; | |
1046 | case 1: | |
1047 | g_array_set_size(pos->packet_index, 2); | |
1048 | prev_index = &g_array_index(pos->packet_index, | |
1049 | struct packet_index, 0); | |
1050 | cur_index = &g_array_index(pos->packet_index, | |
1051 | struct packet_index, 1); | |
1052 | break; | |
1053 | case 2: | |
1054 | g_array_index(pos->packet_index, | |
1055 | struct packet_index, 0) = | |
1056 | g_array_index(pos->packet_index, | |
1057 | struct packet_index, 1); | |
1058 | prev_index = &g_array_index(pos->packet_index, | |
1059 | struct packet_index, 0); | |
1060 | cur_index = &g_array_index(pos->packet_index, | |
1061 | struct packet_index, 1); | |
1062 | break; | |
1063 | default: | |
1064 | abort(); | |
1065 | break; | |
1066 | } | |
4a744367 | 1067 | printf_verbose("get_next_index for stream %" PRIu64 "\n", viewer_stream->id); |
f1f52630 | 1068 | ret = get_next_index(session->ctx, viewer_stream, cur_index); |
4a744367 JD |
1069 | if (ret < 0) { |
1070 | pos->offset = EOF; | |
1071 | fprintf(stderr, "[error] get_next_index failed\n"); | |
1072 | return; | |
1073 | } | |
1074 | ||
f1f52630 MD |
1075 | pos->packet_size = cur_index->packet_size; |
1076 | pos->content_size = cur_index->content_size; | |
4a744367 | 1077 | pos->mmap_base_offset = 0; |
f1f52630 | 1078 | if (cur_index->offset == EOF) { |
4a744367 JD |
1079 | pos->offset = EOF; |
1080 | } else { | |
1081 | pos->offset = 0; | |
1082 | } | |
1083 | ||
f1f52630 MD |
1084 | if (cur_index->content_size == 0) { |
1085 | file_stream->parent.cycles_timestamp = | |
1086 | cur_index->ts_cycles.timestamp_end; | |
4a744367 | 1087 | file_stream->parent.real_timestamp = ctf_get_real_timestamp( |
f1f52630 MD |
1088 | &file_stream->parent, |
1089 | cur_index->ts_cycles.timestamp_end); | |
4a744367 | 1090 | } else { |
f1f52630 MD |
1091 | /* Convert the timestamps and append to the real_index. */ |
1092 | cur_index->ts_real.timestamp_begin = ctf_get_real_timestamp( | |
1093 | &file_stream->parent, | |
1094 | cur_index->ts_cycles.timestamp_begin); | |
1095 | cur_index->ts_real.timestamp_end = ctf_get_real_timestamp( | |
1096 | &file_stream->parent, | |
1097 | cur_index->ts_cycles.timestamp_end); | |
1098 | ||
1099 | ctf_update_current_packet_index(&file_stream->parent, | |
1100 | prev_index, cur_index); | |
1101 | ||
1102 | file_stream->parent.cycles_timestamp = | |
1103 | cur_index->ts_cycles.timestamp_begin; | |
1104 | file_stream->parent.real_timestamp = | |
1105 | cur_index->ts_real.timestamp_begin; | |
4a744367 JD |
1106 | } |
1107 | ||
1108 | if (pos->packet_size == 0 || pos->offset == EOF) { | |
1109 | goto end; | |
1110 | } | |
1111 | ||
1112 | printf_verbose("get_data_packet for stream %" PRIu64 "\n", | |
1113 | viewer_stream->id); | |
1114 | ret = get_data_packet(session->ctx, pos, viewer_stream, | |
f1f52630 MD |
1115 | be64toh(cur_index->offset), |
1116 | cur_index->packet_size / CHAR_BIT); | |
4a744367 JD |
1117 | if (ret == -2) { |
1118 | goto retry; | |
1119 | } else if (ret < 0) { | |
1120 | pos->offset = EOF; | |
1121 | fprintf(stderr, "[error] get_data_packet failed\n"); | |
1122 | return; | |
1123 | } | |
1124 | ||
1125 | printf_verbose("Index received : packet_size : %" PRIu64 | |
1126 | ", offset %" PRIu64 ", content_size %" PRIu64 | |
1127 | ", timestamp_end : %" PRIu64 "\n", | |
f1f52630 MD |
1128 | cur_index->packet_size, cur_index->offset, |
1129 | cur_index->content_size, | |
1130 | cur_index->ts_cycles.timestamp_end); | |
4a744367 JD |
1131 | |
1132 | /* update trace_packet_header and stream_packet_context */ | |
1133 | if (pos->prot != PROT_WRITE && file_stream->parent.trace_packet_header) { | |
1134 | /* Read packet header */ | |
1135 | ret = generic_rw(&pos->parent, &file_stream->parent.trace_packet_header->p); | |
1136 | if (ret) { | |
1137 | pos->offset = EOF; | |
1138 | fprintf(stderr, "[error] trace packet header read failed\n"); | |
1139 | goto end; | |
1140 | } | |
1141 | } | |
1142 | if (pos->prot != PROT_WRITE && file_stream->parent.stream_packet_context) { | |
1143 | /* Read packet context */ | |
1144 | ret = generic_rw(&pos->parent, &file_stream->parent.stream_packet_context->p); | |
1145 | if (ret) { | |
1146 | pos->offset = EOF; | |
1147 | fprintf(stderr, "[error] stream packet context read failed\n"); | |
1148 | goto end; | |
1149 | } | |
1150 | } | |
1151 | pos->data_offset = pos->offset; | |
1152 | ||
1153 | end: | |
1154 | return; | |
1155 | } | |
1156 | ||
2acdc547 JD |
1157 | int lttng_live_create_viewer_session(struct lttng_live_ctx *ctx) |
1158 | { | |
1159 | struct lttng_viewer_cmd cmd; | |
1160 | struct lttng_viewer_create_session_response resp; | |
1161 | int ret; | |
1162 | ssize_t ret_len; | |
1163 | ||
1164 | cmd.cmd = htobe32(LTTNG_VIEWER_CREATE_SESSION); | |
1165 | cmd.data_size = 0; | |
1166 | cmd.cmd_version = 0; | |
1167 | ||
1168 | do { | |
1169 | ret_len = send(ctx->control_sock, &cmd, sizeof(cmd), 0); | |
1170 | } while (ret_len < 0 && errno == EINTR); | |
1171 | if (ret_len < 0) { | |
79620497 | 1172 | perror("[error] Error sending cmd"); |
2acdc547 JD |
1173 | ret = ret_len; |
1174 | goto error; | |
1175 | } | |
1176 | assert(ret_len == sizeof(cmd)); | |
1177 | ||
1178 | do { | |
1179 | ret_len = recv(ctx->control_sock, &resp, sizeof(resp), 0); | |
1180 | } while (ret_len < 0 && errno == EINTR); | |
f8612f31 MD |
1181 | if (ret_len == 0) { |
1182 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
1183 | ret = -1; | |
1184 | goto error; | |
1185 | } | |
2acdc547 | 1186 | if (ret_len < 0) { |
79620497 | 1187 | perror("[error] Error receiving create session reply"); |
2acdc547 JD |
1188 | ret = ret_len; |
1189 | goto error; | |
1190 | } | |
1191 | assert(ret_len == sizeof(resp)); | |
1192 | ||
1193 | if (be32toh(resp.status) != LTTNG_VIEWER_CREATE_SESSION_OK) { | |
1194 | fprintf(stderr, "[error] Error creating viewer session\n"); | |
1195 | ret = -1; | |
1196 | goto error; | |
1197 | } | |
1198 | ret = 0; | |
1199 | ||
1200 | error: | |
1201 | return ret; | |
1202 | } | |
1203 | ||
1204 | static | |
1205 | int del_traces(gpointer key, gpointer value, gpointer user_data) | |
4a744367 JD |
1206 | { |
1207 | struct bt_context *bt_ctx = user_data; | |
1208 | struct lttng_live_ctf_trace *trace = value; | |
1209 | int ret; | |
1210 | ||
1211 | ret = bt_context_remove_trace(bt_ctx, trace->trace_id); | |
1212 | if (ret < 0) | |
1213 | fprintf(stderr, "[error] removing trace from context\n"); | |
1214 | ||
1215 | /* remove the key/value pair from the HT. */ | |
1216 | return 1; | |
1217 | } | |
1218 | ||
2acdc547 JD |
1219 | static |
1220 | void add_traces(gpointer key, gpointer value, gpointer user_data) | |
4a744367 | 1221 | { |
9abca178 | 1222 | int i, ret; |
4a744367 JD |
1223 | struct bt_context *bt_ctx = user_data; |
1224 | struct lttng_live_ctf_trace *trace = value; | |
1225 | struct lttng_live_viewer_stream *stream; | |
1226 | struct bt_mmap_stream *new_mmap_stream; | |
1227 | struct bt_mmap_stream_list mmap_list; | |
1228 | struct lttng_live_ctx *ctx = NULL; | |
150595c4 JD |
1229 | struct bt_trace_descriptor *td; |
1230 | struct bt_trace_handle *handle; | |
4a744367 | 1231 | |
b5a1fa45 JD |
1232 | /* |
1233 | * We don't know how many streams we will receive for a trace, so | |
1234 | * once we are done receiving the traces, we add all the traces | |
1235 | * received to the bt_context. | |
1236 | * We can receive streams during the attach command or the | |
1237 | * get_new_streams, so we have to make sure not to add multiple | |
1238 | * times the same traces. | |
1239 | * If a trace is already in the context, we just skip this function. | |
1240 | */ | |
2acdc547 JD |
1241 | if (trace->in_use) |
1242 | return; | |
1243 | ||
4a744367 JD |
1244 | BT_INIT_LIST_HEAD(&mmap_list.head); |
1245 | ||
1246 | for (i = 0; i < trace->streams->len; i++) { | |
1247 | stream = g_ptr_array_index(trace->streams, i); | |
1248 | ctx = stream->session->ctx; | |
1249 | ||
1250 | if (!stream->metadata_flag) { | |
1251 | new_mmap_stream = zmalloc(sizeof(struct bt_mmap_stream)); | |
1252 | new_mmap_stream->priv = (void *) stream; | |
1253 | new_mmap_stream->fd = -1; | |
1254 | bt_list_add(&new_mmap_stream->list, &mmap_list.head); | |
1255 | } else { | |
af701dc4 JD |
1256 | char *metadata_buf = NULL; |
1257 | ||
4a744367 | 1258 | /* Get all possible metadata before starting */ |
af701dc4 JD |
1259 | ret = get_new_metadata(ctx, stream, &metadata_buf); |
1260 | if (ret) { | |
1261 | free(metadata_buf); | |
1262 | goto end_free; | |
1263 | } | |
1264 | if (!stream->metadata_len) { | |
1265 | fprintf(stderr, "[error] empty metadata\n"); | |
1266 | ret = -1; | |
1267 | free(metadata_buf); | |
1268 | goto end_free; | |
1269 | } | |
1270 | ||
1271 | trace->metadata_fp = babeltrace_fmemopen(metadata_buf, | |
1272 | stream->metadata_len, "rb"); | |
1273 | if (!trace->metadata_fp) { | |
1274 | perror("Metadata fmemopen"); | |
1275 | ret = -1; | |
1276 | free(metadata_buf); | |
9abca178 | 1277 | goto end_free; |
af701dc4 | 1278 | } |
4a744367 JD |
1279 | } |
1280 | } | |
1281 | ||
1282 | if (!trace->metadata_fp) { | |
1283 | fprintf(stderr, "[error] No metadata stream opened\n"); | |
1284 | goto end_free; | |
1285 | } | |
1286 | ||
1287 | ret = bt_context_add_trace(bt_ctx, NULL, "ctf", | |
1288 | ctf_live_packet_seek, &mmap_list, trace->metadata_fp); | |
1289 | if (ret < 0) { | |
1290 | fprintf(stderr, "[error] Error adding trace\n"); | |
1291 | goto end_free; | |
1292 | } | |
af701dc4 JD |
1293 | trace->metadata_stream->metadata_len = 0; |
1294 | ||
150595c4 JD |
1295 | handle = (struct bt_trace_handle *) g_hash_table_lookup( |
1296 | bt_ctx->trace_handles, | |
1297 | (gpointer) (unsigned long) ret); | |
1298 | td = handle->td; | |
1299 | trace->handle = handle; | |
2acdc547 | 1300 | if (bt_ctx->current_iterator) { |
2acdc547 JD |
1301 | bt_iter_add_trace(bt_ctx->current_iterator, td); |
1302 | } | |
1303 | ||
4a744367 | 1304 | trace->trace_id = ret; |
2acdc547 | 1305 | trace->in_use = 1; |
4a744367 JD |
1306 | |
1307 | goto end; | |
1308 | ||
1309 | end_free: | |
1310 | bt_context_put(bt_ctx); | |
1311 | end: | |
1312 | return; | |
1313 | } | |
1314 | ||
2acdc547 | 1315 | int lttng_live_get_new_streams(struct lttng_live_ctx *ctx, uint64_t id) |
6192b988 JD |
1316 | { |
1317 | struct lttng_viewer_cmd cmd; | |
2acdc547 JD |
1318 | struct lttng_viewer_new_streams_request rq; |
1319 | struct lttng_viewer_new_streams_response rp; | |
1320 | struct lttng_viewer_stream stream; | |
1321 | int ret, i; | |
6192b988 | 1322 | ssize_t ret_len; |
b5a1fa45 | 1323 | uint32_t stream_count; |
6192b988 | 1324 | |
2acdc547 JD |
1325 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_NEW_STREAMS); |
1326 | cmd.data_size = sizeof(rq); | |
6192b988 JD |
1327 | cmd.cmd_version = 0; |
1328 | ||
2acdc547 JD |
1329 | memset(&rq, 0, sizeof(rq)); |
1330 | rq.session_id = htobe64(id); | |
1331 | ||
6192b988 JD |
1332 | do { |
1333 | ret_len = send(ctx->control_sock, &cmd, sizeof(cmd), 0); | |
1334 | } while (ret_len < 0 && errno == EINTR); | |
1335 | if (ret_len < 0) { | |
79620497 | 1336 | perror("[error] Error sending cmd"); |
6192b988 JD |
1337 | ret = ret_len; |
1338 | goto error; | |
1339 | } | |
1340 | assert(ret_len == sizeof(cmd)); | |
1341 | ||
1342 | do { | |
2acdc547 | 1343 | ret_len = send(ctx->control_sock, &rq, sizeof(rq), 0); |
6192b988 JD |
1344 | } while (ret_len < 0 && errno == EINTR); |
1345 | if (ret_len < 0) { | |
79620497 | 1346 | perror("[error] Error sending get_new_streams request"); |
6192b988 JD |
1347 | ret = ret_len; |
1348 | goto error; | |
1349 | } | |
2acdc547 | 1350 | assert(ret_len == sizeof(rq)); |
6192b988 | 1351 | |
2acdc547 JD |
1352 | do { |
1353 | ret_len = recv(ctx->control_sock, &rp, sizeof(rp), 0); | |
1354 | } while (ret_len < 0 && errno == EINTR); | |
f8612f31 MD |
1355 | if (ret_len == 0) { |
1356 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
1357 | ret = -1; | |
1358 | goto error; | |
1359 | } | |
2acdc547 | 1360 | if (ret_len < 0) { |
79620497 | 1361 | perror("[error] Error receiving get_new_streams response"); |
2acdc547 | 1362 | ret = ret_len; |
6192b988 JD |
1363 | goto error; |
1364 | } | |
2acdc547 JD |
1365 | assert(ret_len == sizeof(rp)); |
1366 | ||
1367 | switch(be32toh(rp.status)) { | |
1368 | case LTTNG_VIEWER_NEW_STREAMS_OK: | |
1369 | break; | |
1370 | case LTTNG_VIEWER_NEW_STREAMS_NO_NEW: | |
1371 | ret = 0; | |
1372 | goto end; | |
1373 | case LTTNG_VIEWER_NEW_STREAMS_HUP: | |
1374 | ret = -LTTNG_VIEWER_NEW_STREAMS_HUP; | |
1375 | goto end; | |
1376 | case LTTNG_VIEWER_NEW_STREAMS_ERR: | |
1377 | fprintf(stderr, "[error] get_new_streams error\n"); | |
1378 | ret = -1; | |
1379 | goto end; | |
1380 | default: | |
1381 | fprintf(stderr, "[error] Unknown return code %u\n", | |
1382 | be32toh(rp.status)); | |
1383 | ret = -1; | |
1384 | goto end; | |
1385 | } | |
1386 | ||
b5a1fa45 JD |
1387 | stream_count = be32toh(rp.streams_count); |
1388 | ctx->session->stream_count += stream_count; | |
2acdc547 JD |
1389 | /* |
1390 | * When the session is created but not started, we do an active wait | |
1391 | * until it starts. It allows the viewer to start processing the trace | |
1392 | * as soon as the session starts. | |
1393 | */ | |
1394 | if (ctx->session->stream_count == 0) { | |
1395 | ret = 0; | |
1396 | goto end; | |
1397 | } | |
1398 | printf_verbose("Waiting for %" PRIu64 " streams:\n", | |
1399 | ctx->session->stream_count); | |
1400 | ctx->session->streams = g_new0(struct lttng_live_viewer_stream, | |
1401 | ctx->session->stream_count); | |
b5a1fa45 | 1402 | for (i = 0; i < stream_count; i++) { |
2acdc547 JD |
1403 | do { |
1404 | ret_len = recv(ctx->control_sock, &stream, sizeof(stream), 0); | |
1405 | } while (ret_len < 0 && errno == EINTR); | |
f8612f31 MD |
1406 | if (ret_len == 0) { |
1407 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
1408 | ret = -1; | |
1409 | goto error; | |
1410 | } | |
2acdc547 | 1411 | if (ret_len < 0) { |
79620497 | 1412 | perror("[error] Error receiving stream"); |
2acdc547 JD |
1413 | ret = ret_len; |
1414 | goto error; | |
1415 | } | |
1416 | assert(ret_len == sizeof(stream)); | |
1417 | stream.path_name[LTTNG_VIEWER_PATH_MAX - 1] = '\0'; | |
1418 | stream.channel_name[LTTNG_VIEWER_NAME_MAX - 1] = '\0'; | |
1419 | ||
1420 | printf_verbose(" stream %" PRIu64 " : %s/%s\n", | |
1421 | be64toh(stream.id), stream.path_name, | |
1422 | stream.channel_name); | |
1423 | ctx->session->streams[i].id = be64toh(stream.id); | |
1424 | ctx->session->streams[i].session = ctx->session; | |
1425 | ||
1426 | ctx->session->streams[i].first_read = 1; | |
1427 | ctx->session->streams[i].mmap_size = 0; | |
1428 | ||
1429 | if (be32toh(stream.metadata_flag)) { | |
2acdc547 | 1430 | ctx->session->streams[i].metadata_flag = 1; |
2acdc547 JD |
1431 | } |
1432 | ret = lttng_live_ctf_trace_assign(&ctx->session->streams[i], | |
1433 | be64toh(stream.ctf_trace_id)); | |
1434 | if (ret < 0) { | |
1435 | goto error; | |
1436 | } | |
1437 | ||
1438 | } | |
6192b988 JD |
1439 | ret = 0; |
1440 | ||
2acdc547 | 1441 | end: |
6192b988 JD |
1442 | error: |
1443 | return ret; | |
1444 | } | |
1445 | ||
2acdc547 | 1446 | void lttng_live_read(struct lttng_live_ctx *ctx) |
4a744367 | 1447 | { |
2acdc547 | 1448 | int ret, i; |
4a744367 JD |
1449 | struct bt_ctf_iter *iter; |
1450 | const struct bt_ctf_event *event; | |
1451 | struct bt_iter_pos begin_pos; | |
1452 | struct bt_trace_descriptor *td_write; | |
1453 | struct bt_format *fmt_write; | |
1454 | struct ctf_text_stream_pos *sout; | |
2acdc547 | 1455 | uint64_t id; |
4a744367 | 1456 | |
2acdc547 JD |
1457 | ctx->bt_ctx = bt_context_create(); |
1458 | if (!ctx->bt_ctx) { | |
4a744367 JD |
1459 | fprintf(stderr, "[error] bt_context_create allocation\n"); |
1460 | goto end; | |
1461 | } | |
1462 | ||
1463 | fmt_write = bt_lookup_format(g_quark_from_static_string("text")); | |
1464 | if (!fmt_write) { | |
1465 | fprintf(stderr, "[error] ctf-text error\n"); | |
1466 | goto end; | |
1467 | } | |
1468 | ||
1469 | td_write = fmt_write->open_trace(NULL, O_RDWR, NULL, NULL); | |
1470 | if (!td_write) { | |
1471 | fprintf(stderr, "[error] Error opening output trace\n"); | |
1472 | goto end_free; | |
1473 | } | |
1474 | ||
1475 | sout = container_of(td_write, struct ctf_text_stream_pos, | |
1476 | trace_descriptor); | |
1477 | if (!sout->parent.event_cb) | |
1478 | goto end_free; | |
1479 | ||
6192b988 JD |
1480 | ret = lttng_live_create_viewer_session(ctx); |
1481 | if (ret < 0) { | |
1482 | goto end_free; | |
1483 | } | |
1484 | ||
2acdc547 JD |
1485 | for (i = 0; i < ctx->session_ids->len; i++) { |
1486 | id = g_array_index(ctx->session_ids, uint64_t, i); | |
1487 | printf_verbose("Attaching to session %lu\n", id); | |
1488 | ret = lttng_live_attach_session(ctx, id); | |
1489 | printf_verbose("Attaching session returns %d\n", ret); | |
1490 | if (ret < 0) { | |
1491 | if (ret == -LTTNG_VIEWER_ATTACH_UNK) { | |
1492 | fprintf(stderr, "[error] Unknown session ID\n"); | |
1493 | } | |
1494 | goto end_free; | |
1495 | } | |
1496 | } | |
1497 | ||
4a744367 | 1498 | /* |
2acdc547 | 1499 | * As long as the session is active, we try to get new streams. |
4a744367 | 1500 | */ |
2acdc547 | 1501 | for (;;) { |
4a744367 JD |
1502 | int flags; |
1503 | ||
2acdc547 JD |
1504 | while (!ctx->session->stream_count) { |
1505 | if (ctx->session_ids->len == 0) | |
4a744367 | 1506 | goto end_free; |
2acdc547 JD |
1507 | ret = ask_new_streams(ctx); |
1508 | if (ret < 0) | |
1509 | goto end_free; | |
1510 | } | |
4a744367 | 1511 | |
2acdc547 JD |
1512 | g_hash_table_foreach(ctx->session->ctf_traces, add_traces, |
1513 | ctx->bt_ctx); | |
4a744367 JD |
1514 | |
1515 | begin_pos.type = BT_SEEK_BEGIN; | |
2acdc547 | 1516 | iter = bt_ctf_iter_create(ctx->bt_ctx, &begin_pos, NULL); |
4a744367 JD |
1517 | if (!iter) { |
1518 | fprintf(stderr, "[error] Iterator creation error\n"); | |
1519 | goto end; | |
1520 | } | |
1521 | for (;;) { | |
1522 | event = bt_ctf_iter_read_event_flags(iter, &flags); | |
1523 | if (!(flags & BT_ITER_FLAG_RETRY)) { | |
1524 | if (!event) { | |
1525 | /* End of trace */ | |
1526 | break; | |
1527 | } | |
1528 | ret = sout->parent.event_cb(&sout->parent, | |
1529 | event->parent->stream); | |
1530 | if (ret) { | |
1531 | fprintf(stderr, "[error] Writing " | |
1532 | "event failed.\n"); | |
1533 | goto end_free; | |
1534 | } | |
1535 | } | |
1536 | ret = bt_iter_next(bt_ctf_get_iter(iter)); | |
1537 | if (ret < 0) { | |
1538 | goto end_free; | |
1539 | } | |
1540 | } | |
1541 | bt_ctf_iter_destroy(iter); | |
2acdc547 JD |
1542 | g_hash_table_foreach_remove(ctx->session->ctf_traces, |
1543 | del_traces, ctx->bt_ctx); | |
1544 | ctx->session->stream_count = 0; | |
1545 | } | |
4a744367 JD |
1546 | |
1547 | end_free: | |
2acdc547 | 1548 | bt_context_put(ctx->bt_ctx); |
4a744367 JD |
1549 | end: |
1550 | return; | |
1551 | } |