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> | |
85e2085e | 36 | #include <poll.h> |
4a744367 JD |
37 | |
38 | #include <babeltrace/ctf/ctf-index.h> | |
39 | ||
40 | #include <babeltrace/babeltrace.h> | |
41 | #include <babeltrace/ctf/events.h> | |
42 | #include <babeltrace/ctf/callbacks.h> | |
43 | #include <babeltrace/ctf/iterator.h> | |
44 | ||
45 | /* for packet_index */ | |
46 | #include <babeltrace/ctf/types.h> | |
47 | ||
48 | #include <babeltrace/ctf/metadata.h> | |
49 | #include <babeltrace/ctf-text/types.h> | |
50 | #include <babeltrace/ctf/events-internal.h> | |
51 | #include <formats/ctf/events-private.h> | |
52 | ||
af701dc4 JD |
53 | #include <babeltrace/compat/memstream.h> |
54 | ||
c98627ca | 55 | #include "lttng-live.h" |
158eea6e | 56 | #include "lttng-viewer-abi.h" |
4a744367 | 57 | |
85e2085e MD |
58 | #define ACTIVE_POLL_DELAY 100 /* ms */ |
59 | ||
4a744367 JD |
60 | /* |
61 | * Memory allocation zeroed | |
62 | */ | |
63 | #define zmalloc(x) calloc(1, x) | |
64 | ||
65 | #ifndef max_t | |
66 | #define max_t(type, a, b) \ | |
67 | ((type) (a) > (type) (b) ? (type) (a) : (type) (b)) | |
68 | #endif | |
69 | ||
b5a1fa45 JD |
70 | static void ctf_live_packet_seek(struct bt_stream_pos *stream_pos, |
71 | size_t index, int whence); | |
2acdc547 JD |
72 | static void add_traces(gpointer key, gpointer value, gpointer user_data); |
73 | static int del_traces(gpointer key, gpointer value, gpointer user_data); | |
9abca178 | 74 | static int get_new_metadata(struct lttng_live_ctx *ctx, |
af701dc4 JD |
75 | struct lttng_live_viewer_stream *viewer_stream, |
76 | char **metadata_buf); | |
2acdc547 | 77 | |
b7e8a8e1 MD |
78 | static |
79 | ssize_t lttng_live_recv(int fd, void *buf, size_t len) | |
80 | { | |
81 | ssize_t ret; | |
82 | size_t copied = 0, to_copy = len; | |
83 | ||
84 | do { | |
85 | ret = recv(fd, buf + copied, to_copy, 0); | |
86 | if (ret > 0) { | |
87 | assert(ret <= to_copy); | |
88 | copied += ret; | |
89 | to_copy -= ret; | |
90 | } | |
91 | } while ((ret > 0 && to_copy > 0) | |
92 | || (ret < 0 && errno == EINTR)); | |
93 | if (ret > 0) | |
94 | ret = copied; | |
95 | /* ret = 0 means orderly shutdown, ret < 0 is error. */ | |
96 | return ret; | |
97 | } | |
98 | ||
99 | static | |
100 | ssize_t lttng_live_send(int fd, const void *buf, size_t len) | |
101 | { | |
102 | ssize_t ret; | |
103 | ||
104 | do { | |
105 | ret = send(fd, buf, len, MSG_NOSIGNAL); | |
106 | } while (ret < 0 && errno == EINTR); | |
107 | return ret; | |
108 | } | |
109 | ||
b5a1fa45 | 110 | int lttng_live_connect_viewer(struct lttng_live_ctx *ctx) |
4a744367 JD |
111 | { |
112 | struct hostent *host; | |
113 | struct sockaddr_in server_addr; | |
114 | int ret; | |
115 | ||
b5a1fa45 | 116 | host = gethostbyname(ctx->relay_hostname); |
4a744367 JD |
117 | if (!host) { |
118 | ret = -1; | |
119 | goto end; | |
120 | } | |
121 | ||
122 | if ((ctx->control_sock = socket(AF_INET, SOCK_STREAM, 0)) == -1) { | |
123 | perror("Socket"); | |
124 | ret = -1; | |
125 | goto end; | |
126 | } | |
127 | ||
128 | server_addr.sin_family = AF_INET; | |
b5a1fa45 | 129 | server_addr.sin_port = htons(ctx->port); |
4a744367 JD |
130 | server_addr.sin_addr = *((struct in_addr *) host->h_addr); |
131 | bzero(&(server_addr.sin_zero), 8); | |
132 | ||
133 | if (connect(ctx->control_sock, (struct sockaddr *) &server_addr, | |
134 | sizeof(struct sockaddr)) == -1) { | |
135 | perror("Connect"); | |
136 | ret = -1; | |
137 | goto end; | |
138 | } | |
139 | ||
140 | ret = 0; | |
141 | ||
142 | end: | |
143 | return ret; | |
144 | } | |
145 | ||
146 | int lttng_live_establish_connection(struct lttng_live_ctx *ctx) | |
147 | { | |
148 | struct lttng_viewer_cmd cmd; | |
149 | struct lttng_viewer_connect connect; | |
150 | int ret; | |
151 | ssize_t ret_len; | |
152 | ||
153 | cmd.cmd = htobe32(LTTNG_VIEWER_CONNECT); | |
154 | cmd.data_size = sizeof(connect); | |
155 | cmd.cmd_version = 0; | |
156 | ||
0c3cd7e1 | 157 | connect.viewer_session_id = -1ULL; /* will be set on recv */ |
4a744367 JD |
158 | connect.major = htobe32(LTTNG_LIVE_MAJOR); |
159 | connect.minor = htobe32(LTTNG_LIVE_MINOR); | |
160 | connect.type = htobe32(LTTNG_VIEWER_CLIENT_COMMAND); | |
161 | ||
b7e8a8e1 | 162 | ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd)); |
4a744367 | 163 | if (ret_len < 0) { |
79620497 | 164 | perror("[error] Error sending cmd"); |
4a744367 JD |
165 | ret = ret_len; |
166 | goto error; | |
167 | } | |
168 | assert(ret_len == sizeof(cmd)); | |
169 | ||
b7e8a8e1 | 170 | ret_len = lttng_live_send(ctx->control_sock, &connect, sizeof(connect)); |
4a744367 | 171 | if (ret_len < 0) { |
79620497 | 172 | perror("[error] Error sending version"); |
4a744367 JD |
173 | ret = ret_len; |
174 | goto error; | |
175 | } | |
176 | assert(ret_len == sizeof(connect)); | |
177 | ||
b7e8a8e1 | 178 | ret_len = lttng_live_recv(ctx->control_sock, &connect, sizeof(connect)); |
f8612f31 MD |
179 | if (ret_len == 0) { |
180 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
181 | ret = -1; | |
182 | goto error; | |
183 | } | |
4a744367 | 184 | if (ret_len < 0) { |
79620497 | 185 | perror("[error] Error receiving version"); |
4a744367 JD |
186 | ret = ret_len; |
187 | goto error; | |
188 | } | |
189 | assert(ret_len == sizeof(connect)); | |
190 | ||
191 | printf_verbose("Received viewer session ID : %" PRIu64 "\n", | |
192 | be64toh(connect.viewer_session_id)); | |
193 | printf_verbose("Relayd version : %u.%u\n", be32toh(connect.major), | |
194 | be32toh(connect.minor)); | |
195 | ||
196 | ret = 0; | |
197 | ||
198 | error: | |
199 | return ret; | |
200 | } | |
201 | ||
b5a1fa45 JD |
202 | static |
203 | void free_session_list(GPtrArray *session_list) | |
204 | { | |
205 | int i; | |
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 | free(relay_session->name); | |
211 | free(relay_session->hostname); | |
212 | } | |
213 | g_ptr_array_free(session_list, TRUE); | |
214 | } | |
215 | ||
216 | static | |
217 | void print_session_list(GPtrArray *session_list, const char *path) | |
218 | { | |
219 | int i; | |
220 | struct lttng_live_relay_session *relay_session; | |
221 | ||
222 | for (i = 0; i < session_list->len; i++) { | |
223 | relay_session = g_ptr_array_index(session_list, i); | |
224 | fprintf(stdout, "%s/host/%s/%s (timer = %u, " | |
225 | "%u stream(s), %u client(s) connected)\n", | |
226 | path, relay_session->hostname, | |
227 | relay_session->name, relay_session->timer, | |
228 | relay_session->streams, relay_session->clients); | |
229 | } | |
230 | } | |
231 | ||
232 | static | |
233 | void update_session_list(GPtrArray *session_list, char *hostname, | |
234 | char *session_name, uint32_t streams, uint32_t clients, | |
235 | uint32_t timer) | |
236 | { | |
237 | int i, found = 0; | |
238 | struct lttng_live_relay_session *relay_session; | |
239 | ||
240 | for (i = 0; i < session_list->len; i++) { | |
241 | relay_session = g_ptr_array_index(session_list, i); | |
242 | if ((strncmp(relay_session->hostname, hostname, NAME_MAX) == 0) && | |
243 | strncmp(relay_session->name, | |
244 | session_name, NAME_MAX) == 0) { | |
245 | relay_session->streams += streams; | |
246 | if (relay_session->clients < clients) | |
247 | relay_session->clients = clients; | |
248 | found = 1; | |
249 | break; | |
250 | } | |
251 | } | |
252 | if (found) | |
253 | return; | |
254 | ||
255 | relay_session = g_new0(struct lttng_live_relay_session, 1); | |
256 | relay_session->hostname = strndup(hostname, NAME_MAX); | |
257 | relay_session->name = strndup(session_name, NAME_MAX); | |
258 | relay_session->clients = clients; | |
259 | relay_session->streams = streams; | |
260 | relay_session->timer = timer; | |
261 | g_ptr_array_add(session_list, relay_session); | |
262 | } | |
263 | ||
4a744367 JD |
264 | int lttng_live_list_sessions(struct lttng_live_ctx *ctx, const char *path) |
265 | { | |
266 | struct lttng_viewer_cmd cmd; | |
267 | struct lttng_viewer_list_sessions list; | |
268 | struct lttng_viewer_session lsession; | |
b5a1fa45 | 269 | int i, ret, sessions_count, print_list = 0; |
4a744367 | 270 | ssize_t ret_len; |
b5a1fa45 JD |
271 | uint64_t session_id; |
272 | GPtrArray *session_list = NULL; | |
273 | ||
274 | if (strlen(ctx->session_name) == 0) { | |
275 | print_list = 1; | |
276 | session_list = g_ptr_array_new(); | |
277 | } | |
4a744367 JD |
278 | |
279 | cmd.cmd = htobe32(LTTNG_VIEWER_LIST_SESSIONS); | |
280 | cmd.data_size = 0; | |
281 | cmd.cmd_version = 0; | |
282 | ||
b7e8a8e1 | 283 | ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd)); |
4a744367 | 284 | if (ret_len < 0) { |
79620497 | 285 | perror("[error] Error sending cmd"); |
4a744367 JD |
286 | ret = ret_len; |
287 | goto error; | |
288 | } | |
289 | assert(ret_len == sizeof(cmd)); | |
290 | ||
b7e8a8e1 | 291 | ret_len = lttng_live_recv(ctx->control_sock, &list, sizeof(list)); |
f8612f31 MD |
292 | if (ret_len == 0) { |
293 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
294 | ret = -1; | |
295 | goto error; | |
296 | } | |
4a744367 | 297 | if (ret_len < 0) { |
79620497 | 298 | perror("[error] Error receiving session list"); |
4a744367 JD |
299 | ret = ret_len; |
300 | goto error; | |
301 | } | |
302 | assert(ret_len == sizeof(list)); | |
303 | ||
304 | sessions_count = be32toh(list.sessions_count); | |
4a744367 | 305 | for (i = 0; i < sessions_count; i++) { |
b7e8a8e1 | 306 | ret_len = lttng_live_recv(ctx->control_sock, &lsession, sizeof(lsession)); |
f8612f31 MD |
307 | if (ret_len == 0) { |
308 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
309 | ret = -1; | |
310 | goto error; | |
311 | } | |
4a744367 | 312 | if (ret_len < 0) { |
79620497 | 313 | perror("[error] Error receiving session"); |
4a744367 JD |
314 | ret = ret_len; |
315 | goto error; | |
316 | } | |
317 | assert(ret_len == sizeof(lsession)); | |
9ed31e53 MD |
318 | lsession.hostname[LTTNG_VIEWER_HOST_NAME_MAX - 1] = '\0'; |
319 | lsession.session_name[LTTNG_VIEWER_NAME_MAX - 1] = '\0'; | |
b5a1fa45 JD |
320 | session_id = be64toh(lsession.id); |
321 | ||
322 | if (print_list) { | |
323 | update_session_list(session_list, | |
324 | lsession.hostname, | |
325 | lsession.session_name, | |
326 | be32toh(lsession.streams), | |
327 | be32toh(lsession.clients), | |
328 | be32toh(lsession.live_timer)); | |
329 | } else { | |
330 | if ((strncmp(lsession.session_name, ctx->session_name, | |
331 | NAME_MAX) == 0) && (strncmp(lsession.hostname, | |
332 | ctx->traced_hostname, NAME_MAX) == 0)) { | |
333 | printf_verbose("Reading from session %" PRIu64 "\n", | |
334 | session_id); | |
335 | g_array_append_val(ctx->session_ids, | |
336 | session_id); | |
337 | } | |
338 | } | |
339 | } | |
4a744367 | 340 | |
b5a1fa45 JD |
341 | if (print_list) { |
342 | print_session_list(session_list, path); | |
343 | free_session_list(session_list); | |
4a744367 JD |
344 | } |
345 | ||
346 | ret = 0; | |
347 | ||
348 | error: | |
349 | return ret; | |
350 | } | |
351 | ||
352 | int lttng_live_ctf_trace_assign(struct lttng_live_viewer_stream *stream, | |
353 | uint64_t ctf_trace_id) | |
354 | { | |
355 | struct lttng_live_ctf_trace *trace; | |
356 | int ret = 0; | |
357 | ||
358 | trace = g_hash_table_lookup(stream->session->ctf_traces, | |
359 | (gpointer) ctf_trace_id); | |
360 | if (!trace) { | |
361 | trace = g_new0(struct lttng_live_ctf_trace, 1); | |
4a744367 JD |
362 | trace->ctf_trace_id = ctf_trace_id; |
363 | trace->streams = g_ptr_array_new(); | |
364 | g_hash_table_insert(stream->session->ctf_traces, | |
365 | (gpointer) ctf_trace_id, | |
366 | trace); | |
367 | } | |
368 | if (stream->metadata_flag) | |
369 | trace->metadata_stream = stream; | |
370 | ||
371 | stream->ctf_trace = trace; | |
372 | g_ptr_array_add(trace->streams, stream); | |
373 | ||
4a744367 JD |
374 | return ret; |
375 | } | |
376 | ||
af701dc4 JD |
377 | static |
378 | int open_metadata_fp_write(struct lttng_live_viewer_stream *stream, | |
379 | char **metadata_buf, size_t *size) | |
380 | { | |
381 | int ret = 0; | |
382 | ||
383 | stream->metadata_fp_write = | |
384 | babeltrace_open_memstream(metadata_buf, size); | |
385 | if (!stream->metadata_fp_write) { | |
386 | perror("Metadata open_memstream"); | |
387 | ret = -1; | |
388 | } | |
389 | ||
390 | return ret; | |
391 | } | |
392 | ||
4a744367 JD |
393 | int lttng_live_attach_session(struct lttng_live_ctx *ctx, uint64_t id) |
394 | { | |
395 | struct lttng_viewer_cmd cmd; | |
396 | struct lttng_viewer_attach_session_request rq; | |
397 | struct lttng_viewer_attach_session_response rp; | |
398 | struct lttng_viewer_stream stream; | |
399 | int ret, i; | |
400 | ssize_t ret_len; | |
401 | ||
402 | cmd.cmd = htobe32(LTTNG_VIEWER_ATTACH_SESSION); | |
403 | cmd.data_size = sizeof(rq); | |
404 | cmd.cmd_version = 0; | |
405 | ||
406 | memset(&rq, 0, sizeof(rq)); | |
407 | rq.session_id = htobe64(id); | |
408 | // TODO: add cmd line parameter to select seek beginning | |
409 | // rq.seek = htobe32(LTTNG_VIEWER_SEEK_BEGINNING); | |
410 | rq.seek = htobe32(LTTNG_VIEWER_SEEK_LAST); | |
411 | ||
b7e8a8e1 | 412 | ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd)); |
4a744367 | 413 | if (ret_len < 0) { |
79620497 | 414 | perror("[error] Error sending cmd"); |
4a744367 JD |
415 | ret = ret_len; |
416 | goto error; | |
417 | } | |
418 | assert(ret_len == sizeof(cmd)); | |
419 | ||
b7e8a8e1 | 420 | ret_len = lttng_live_send(ctx->control_sock, &rq, sizeof(rq)); |
4a744367 | 421 | if (ret_len < 0) { |
79620497 | 422 | perror("[error] Error sending attach request"); |
4a744367 JD |
423 | ret = ret_len; |
424 | goto error; | |
425 | } | |
426 | assert(ret_len == sizeof(rq)); | |
427 | ||
b7e8a8e1 | 428 | ret_len = lttng_live_recv(ctx->control_sock, &rp, sizeof(rp)); |
f8612f31 MD |
429 | if (ret_len == 0) { |
430 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
431 | ret = -1; | |
432 | goto error; | |
433 | } | |
4a744367 | 434 | if (ret_len < 0) { |
79620497 | 435 | perror("[error] Error receiving attach response"); |
4a744367 JD |
436 | ret = ret_len; |
437 | goto error; | |
438 | } | |
439 | assert(ret_len == sizeof(rp)); | |
440 | ||
441 | switch(be32toh(rp.status)) { | |
442 | case LTTNG_VIEWER_ATTACH_OK: | |
443 | break; | |
444 | case LTTNG_VIEWER_ATTACH_UNK: | |
445 | ret = -LTTNG_VIEWER_ATTACH_UNK; | |
446 | goto end; | |
447 | case LTTNG_VIEWER_ATTACH_ALREADY: | |
79620497 | 448 | fprintf(stderr, "[error] There is already a viewer attached to this session\n"); |
4a744367 JD |
449 | ret = -1; |
450 | goto end; | |
451 | case LTTNG_VIEWER_ATTACH_NOT_LIVE: | |
452 | fprintf(stderr, "[error] Not a live session\n"); | |
453 | ret = -1; | |
454 | goto end; | |
455 | case LTTNG_VIEWER_ATTACH_SEEK_ERR: | |
456 | fprintf(stderr, "[error] Wrong seek parameter\n"); | |
457 | ret = -1; | |
458 | goto end; | |
459 | default: | |
460 | fprintf(stderr, "[error] Unknown attach return code %u\n", | |
461 | be32toh(rp.status)); | |
462 | ret = -1; | |
463 | goto end; | |
464 | } | |
465 | if (be32toh(rp.status) != LTTNG_VIEWER_ATTACH_OK) { | |
466 | ret = -1; | |
467 | goto end; | |
468 | } | |
469 | ||
2acdc547 | 470 | ctx->session->stream_count += be32toh(rp.streams_count); |
4a744367 JD |
471 | /* |
472 | * When the session is created but not started, we do an active wait | |
473 | * until it starts. It allows the viewer to start processing the trace | |
474 | * as soon as the session starts. | |
475 | */ | |
476 | if (ctx->session->stream_count == 0) { | |
477 | ret = 0; | |
478 | goto end; | |
479 | } | |
480 | printf_verbose("Waiting for %" PRIu64 " streams:\n", | |
481 | ctx->session->stream_count); | |
482 | ctx->session->streams = g_new0(struct lttng_live_viewer_stream, | |
483 | ctx->session->stream_count); | |
4a744367 | 484 | for (i = 0; i < be32toh(rp.streams_count); i++) { |
b7e8a8e1 | 485 | ret_len = lttng_live_recv(ctx->control_sock, &stream, sizeof(stream)); |
f8612f31 MD |
486 | if (ret_len == 0) { |
487 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
488 | ret = -1; | |
489 | goto error; | |
490 | } | |
4a744367 | 491 | if (ret_len < 0) { |
79620497 | 492 | perror("[error] Error receiving stream"); |
4a744367 JD |
493 | ret = ret_len; |
494 | goto error; | |
495 | } | |
496 | assert(ret_len == sizeof(stream)); | |
9ed31e53 MD |
497 | stream.path_name[LTTNG_VIEWER_PATH_MAX - 1] = '\0'; |
498 | stream.channel_name[LTTNG_VIEWER_NAME_MAX - 1] = '\0'; | |
4a744367 JD |
499 | |
500 | printf_verbose(" stream %" PRIu64 " : %s/%s\n", | |
501 | be64toh(stream.id), stream.path_name, | |
502 | stream.channel_name); | |
503 | ctx->session->streams[i].id = be64toh(stream.id); | |
504 | ctx->session->streams[i].session = ctx->session; | |
505 | ||
506 | ctx->session->streams[i].first_read = 1; | |
507 | ctx->session->streams[i].mmap_size = 0; | |
508 | ||
509 | if (be32toh(stream.metadata_flag)) { | |
4a744367 | 510 | ctx->session->streams[i].metadata_flag = 1; |
4a744367 JD |
511 | } |
512 | ret = lttng_live_ctf_trace_assign(&ctx->session->streams[i], | |
513 | be64toh(stream.ctf_trace_id)); | |
514 | if (ret < 0) { | |
515 | goto error; | |
516 | } | |
517 | ||
518 | } | |
519 | ret = 0; | |
520 | ||
521 | end: | |
522 | error: | |
523 | return ret; | |
524 | } | |
525 | ||
2acdc547 JD |
526 | static |
527 | int ask_new_streams(struct lttng_live_ctx *ctx) | |
528 | { | |
529 | int i, ret = 0; | |
530 | uint64_t id; | |
531 | ||
532 | restart: | |
533 | for (i = 0; i < ctx->session_ids->len; i++) { | |
534 | id = g_array_index(ctx->session_ids, uint64_t, i); | |
535 | ret = lttng_live_get_new_streams(ctx, id); | |
536 | printf_verbose("Asking for new streams returns %d\n", | |
537 | ret); | |
538 | if (ret < 0) { | |
539 | if (ret == -LTTNG_VIEWER_NEW_STREAMS_HUP) { | |
540 | printf_verbose("Session %" PRIu64 " closed\n", | |
541 | id); | |
b5a1fa45 JD |
542 | /* |
543 | * The streams have already been closed during | |
544 | * the reading, so we only need to get rid of | |
545 | * the trace in our internal table of sessions. | |
546 | */ | |
2acdc547 JD |
547 | g_array_remove_index(ctx->session_ids, i); |
548 | /* | |
549 | * We can't continue iterating on the g_array | |
550 | * after a remove, we have to start again. | |
551 | */ | |
552 | goto restart; | |
553 | } else { | |
554 | ret = -1; | |
555 | goto end; | |
556 | } | |
557 | } | |
558 | } | |
559 | ||
560 | end: | |
561 | return ret; | |
562 | } | |
563 | ||
50d207af JD |
564 | static |
565 | int append_metadata(struct lttng_live_ctx *ctx, | |
566 | struct lttng_live_viewer_stream *viewer_stream) | |
567 | { | |
568 | int ret; | |
569 | struct lttng_live_viewer_stream *metadata; | |
570 | char *metadata_buf = NULL; | |
571 | ||
572 | printf_verbose("get_next_index: new metadata needed\n"); | |
573 | ret = get_new_metadata(ctx, viewer_stream, &metadata_buf); | |
574 | if (ret < 0) { | |
575 | free(metadata_buf); | |
576 | goto error; | |
577 | } | |
578 | ||
579 | metadata = viewer_stream->ctf_trace->metadata_stream; | |
580 | metadata->ctf_trace->metadata_fp = | |
581 | babeltrace_fmemopen(metadata_buf, | |
582 | metadata->metadata_len, "rb"); | |
583 | if (!metadata->ctf_trace->metadata_fp) { | |
584 | perror("Metadata fmemopen"); | |
585 | free(metadata_buf); | |
586 | ret = -1; | |
587 | goto error; | |
588 | } | |
589 | ret = ctf_append_trace_metadata( | |
590 | viewer_stream->ctf_trace->handle->td, | |
591 | metadata->ctf_trace->metadata_fp); | |
251fc08c MD |
592 | /* We accept empty metadata packets */ |
593 | if (ret != 0 && ret != -ENOENT) { | |
50d207af JD |
594 | fprintf(stderr, "[error] Appending metadata\n"); |
595 | goto error; | |
596 | } | |
251fc08c | 597 | ret = 0; |
50d207af JD |
598 | |
599 | error: | |
600 | return ret; | |
601 | } | |
602 | ||
4a744367 JD |
603 | static |
604 | int get_data_packet(struct lttng_live_ctx *ctx, | |
605 | struct ctf_stream_pos *pos, | |
606 | struct lttng_live_viewer_stream *stream, uint64_t offset, | |
607 | uint64_t len) | |
608 | { | |
609 | struct lttng_viewer_cmd cmd; | |
610 | struct lttng_viewer_get_packet rq; | |
611 | struct lttng_viewer_trace_packet rp; | |
612 | ssize_t ret_len; | |
613 | int ret; | |
614 | ||
50d207af | 615 | retry: |
4a744367 JD |
616 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_PACKET); |
617 | cmd.data_size = sizeof(rq); | |
618 | cmd.cmd_version = 0; | |
619 | ||
620 | memset(&rq, 0, sizeof(rq)); | |
621 | rq.stream_id = htobe64(stream->id); | |
622 | /* Already in big endian. */ | |
623 | rq.offset = offset; | |
624 | rq.len = htobe32(len); | |
625 | ||
b7e8a8e1 | 626 | ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd)); |
4a744367 | 627 | if (ret_len < 0) { |
79620497 | 628 | perror("[error] Error sending cmd"); |
4a744367 JD |
629 | ret = ret_len; |
630 | goto error; | |
631 | } | |
632 | assert(ret_len == sizeof(cmd)); | |
633 | ||
b7e8a8e1 | 634 | ret_len = lttng_live_send(ctx->control_sock, &rq, sizeof(rq)); |
4a744367 | 635 | if (ret_len < 0) { |
79620497 | 636 | perror("[error] Error sending get_data_packet request"); |
4a744367 JD |
637 | ret = ret_len; |
638 | goto error; | |
639 | } | |
640 | assert(ret_len == sizeof(rq)); | |
641 | ||
b7e8a8e1 | 642 | ret_len = lttng_live_recv(ctx->control_sock, &rp, sizeof(rp)); |
f8612f31 MD |
643 | if (ret_len == 0) { |
644 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
645 | ret = -1; | |
646 | goto error; | |
647 | } | |
4a744367 | 648 | if (ret_len < 0) { |
79620497 | 649 | perror("[error] Error receiving data response"); |
4a744367 JD |
650 | ret = ret_len; |
651 | goto error; | |
652 | } | |
57b9d843 JD |
653 | if (ret_len != sizeof(rp)) { |
654 | fprintf(stderr, "[error] get_data_packet: expected %" PRId64 | |
655 | ", received %" PRId64 "\n", ret_len, | |
656 | sizeof(rp)); | |
657 | ret = -1; | |
658 | goto error; | |
659 | } | |
4a744367 JD |
660 | |
661 | rp.flags = be32toh(rp.flags); | |
662 | ||
663 | switch (be32toh(rp.status)) { | |
664 | case LTTNG_VIEWER_GET_PACKET_OK: | |
665 | len = be32toh(rp.len); | |
666 | printf_verbose("get_data_packet: Ok, packet size : %" PRIu64 | |
667 | "\n", len); | |
668 | break; | |
669 | case LTTNG_VIEWER_GET_PACKET_RETRY: | |
670 | printf_verbose("get_data_packet: retry\n"); | |
671 | ret = -1; | |
672 | goto end; | |
673 | case LTTNG_VIEWER_GET_PACKET_ERR: | |
674 | if (rp.flags & LTTNG_VIEWER_FLAG_NEW_METADATA) { | |
675 | printf_verbose("get_data_packet: new metadata needed\n"); | |
50d207af JD |
676 | ret = append_metadata(ctx, stream); |
677 | if (ret) | |
678 | goto error; | |
4a744367 | 679 | } |
2acdc547 | 680 | if (rp.flags & LTTNG_VIEWER_FLAG_NEW_STREAM) { |
f312b3aa | 681 | printf_verbose("get_data_packet: new streams needed\n"); |
2acdc547 JD |
682 | ret = ask_new_streams(ctx); |
683 | if (ret < 0) | |
684 | goto error; | |
4d4bf6eb MD |
685 | g_hash_table_foreach(ctx->session->ctf_traces, |
686 | add_traces, ctx->bt_ctx); | |
2acdc547 | 687 | } |
f312b3aa MD |
688 | if (rp.flags & (LTTNG_VIEWER_FLAG_NEW_METADATA |
689 | | LTTNG_VIEWER_FLAG_NEW_STREAM)) { | |
690 | goto retry; | |
691 | } | |
4a744367 JD |
692 | fprintf(stderr, "[error] get_data_packet: error\n"); |
693 | ret = -1; | |
694 | goto end; | |
695 | case LTTNG_VIEWER_GET_PACKET_EOF: | |
696 | ret = -2; | |
697 | goto error; | |
698 | default: | |
699 | printf_verbose("get_data_packet: unknown\n"); | |
700 | assert(0); | |
701 | ret = -1; | |
702 | goto end; | |
703 | } | |
704 | ||
705 | if (len <= 0) { | |
706 | ret = -1; | |
707 | goto end; | |
708 | } | |
709 | ||
710 | if (len > stream->mmap_size) { | |
711 | uint64_t new_size; | |
712 | ||
713 | new_size = max_t(uint64_t, len, stream->mmap_size << 1); | |
714 | if (pos->base_mma) { | |
715 | /* unmap old base */ | |
716 | ret = munmap_align(pos->base_mma); | |
717 | if (ret) { | |
79620497 | 718 | perror("[error] Unable to unmap old base"); |
4a744367 JD |
719 | ret = -1; |
720 | goto error; | |
721 | } | |
722 | pos->base_mma = NULL; | |
723 | } | |
724 | pos->base_mma = mmap_align(new_size, | |
725 | PROT_READ | PROT_WRITE, | |
726 | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); | |
727 | if (pos->base_mma == MAP_FAILED) { | |
79620497 | 728 | perror("[error] mmap error"); |
4a744367 JD |
729 | pos->base_mma = NULL; |
730 | ret = -1; | |
731 | goto error; | |
732 | } | |
733 | ||
734 | stream->mmap_size = new_size; | |
735 | printf_verbose("Expanding stream mmap size to %" PRIu64 " bytes\n", | |
736 | stream->mmap_size); | |
737 | } | |
738 | ||
b7e8a8e1 MD |
739 | ret_len = lttng_live_recv(ctx->control_sock, |
740 | mmap_align_addr(pos->base_mma), len); | |
f8612f31 MD |
741 | if (ret_len == 0) { |
742 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
743 | ret = -1; | |
744 | goto error; | |
745 | } | |
4a744367 | 746 | if (ret_len < 0) { |
79620497 | 747 | perror("[error] Error receiving trace packet"); |
4a744367 JD |
748 | ret = ret_len; |
749 | goto error; | |
750 | } | |
751 | assert(ret_len == len); | |
f312b3aa | 752 | ret = 0; |
4a744367 JD |
753 | end: |
754 | error: | |
755 | return ret; | |
756 | } | |
757 | ||
4a744367 | 758 | static |
9abca178 JD |
759 | int get_one_metadata_packet(struct lttng_live_ctx *ctx, |
760 | struct lttng_live_viewer_stream *metadata_stream) | |
4a744367 JD |
761 | { |
762 | uint64_t len = 0; | |
763 | int ret; | |
764 | struct lttng_viewer_cmd cmd; | |
765 | struct lttng_viewer_get_metadata rq; | |
766 | struct lttng_viewer_metadata_packet rp; | |
4a744367 JD |
767 | char *data = NULL; |
768 | ssize_t ret_len; | |
769 | ||
9abca178 | 770 | rq.stream_id = htobe64(metadata_stream->id); |
4a744367 JD |
771 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_METADATA); |
772 | cmd.data_size = sizeof(rq); | |
773 | cmd.cmd_version = 0; | |
774 | ||
b7e8a8e1 | 775 | ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd)); |
4a744367 | 776 | if (ret_len < 0) { |
79620497 | 777 | perror("[error] Error sending cmd"); |
4a744367 JD |
778 | ret = ret_len; |
779 | goto error; | |
780 | } | |
781 | assert(ret_len == sizeof(cmd)); | |
782 | ||
b7e8a8e1 | 783 | ret_len = lttng_live_send(ctx->control_sock, &rq, sizeof(rq)); |
4a744367 | 784 | if (ret_len < 0) { |
79620497 | 785 | perror("[error] Error sending get_metadata request"); |
4a744367 JD |
786 | ret = ret_len; |
787 | goto error; | |
788 | } | |
789 | assert(ret_len == sizeof(rq)); | |
790 | ||
b7e8a8e1 | 791 | ret_len = lttng_live_recv(ctx->control_sock, &rp, sizeof(rp)); |
f8612f31 MD |
792 | if (ret_len == 0) { |
793 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
794 | ret = -1; | |
795 | goto error; | |
796 | } | |
4a744367 | 797 | if (ret_len < 0) { |
79620497 | 798 | perror("[error] Error receiving metadata response"); |
4a744367 JD |
799 | ret = ret_len; |
800 | goto error; | |
801 | } | |
802 | assert(ret_len == sizeof(rp)); | |
803 | ||
804 | switch (be32toh(rp.status)) { | |
805 | case LTTNG_VIEWER_METADATA_OK: | |
806 | printf_verbose("get_metadata : OK\n"); | |
807 | break; | |
808 | case LTTNG_VIEWER_NO_NEW_METADATA: | |
809 | printf_verbose("get_metadata : NO NEW\n"); | |
9abca178 | 810 | ret = 0; |
4a744367 JD |
811 | goto end; |
812 | case LTTNG_VIEWER_METADATA_ERR: | |
813 | printf_verbose("get_metadata : ERR\n"); | |
814 | ret = -1; | |
815 | goto end; | |
816 | default: | |
817 | printf_verbose("get_metadata : UNKNOWN\n"); | |
818 | ret = -1; | |
819 | goto end; | |
820 | } | |
821 | ||
822 | len = be64toh(rp.len); | |
823 | printf_verbose("Writing %" PRIu64" bytes to metadata\n", len); | |
824 | if (len <= 0) { | |
825 | ret = -1; | |
826 | goto end; | |
827 | } | |
828 | ||
829 | data = zmalloc(len); | |
830 | if (!data) { | |
831 | perror("relay data zmalloc"); | |
832 | ret = -1; | |
833 | goto error; | |
834 | } | |
b7e8a8e1 | 835 | ret_len = lttng_live_recv(ctx->control_sock, data, len); |
f8612f31 MD |
836 | if (ret_len == 0) { |
837 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
838 | ret = -1; | |
839 | free(data); | |
840 | goto error; | |
841 | } | |
4a744367 | 842 | if (ret_len < 0) { |
79620497 | 843 | perror("[error] Error receiving trace packet"); |
4a744367 JD |
844 | ret = ret_len; |
845 | free(data); | |
846 | goto error; | |
847 | } | |
848 | assert(ret_len == len); | |
849 | ||
850 | do { | |
af701dc4 JD |
851 | ret_len = fwrite(data, 1, len, |
852 | metadata_stream->metadata_fp_write); | |
4a744367 JD |
853 | } while (ret_len < 0 && errno == EINTR); |
854 | if (ret_len < 0) { | |
af701dc4 | 855 | fprintf(stderr, "[error] Writing in the metadata fp\n"); |
4a744367 JD |
856 | free(data); |
857 | ret = ret_len; | |
858 | goto error; | |
859 | } | |
860 | assert(ret_len == len); | |
af701dc4 | 861 | metadata_stream->metadata_len += len; |
9abca178 | 862 | ret = len; |
4a744367 JD |
863 | |
864 | free(data); | |
865 | ||
4a744367 JD |
866 | end: |
867 | error: | |
868 | return ret; | |
869 | } | |
870 | ||
9abca178 JD |
871 | /* |
872 | * Return 0 on success, a negative value on error. | |
873 | */ | |
874 | static | |
875 | int get_new_metadata(struct lttng_live_ctx *ctx, | |
af701dc4 JD |
876 | struct lttng_live_viewer_stream *viewer_stream, |
877 | char **metadata_buf) | |
9abca178 JD |
878 | { |
879 | int ret = 0; | |
880 | struct lttng_live_viewer_stream *metadata_stream; | |
c111d5d7 | 881 | size_t size, len_read = 0;; |
9abca178 JD |
882 | |
883 | metadata_stream = viewer_stream->ctf_trace->metadata_stream; | |
50d207af JD |
884 | if (!metadata_stream) { |
885 | fprintf(stderr, "[error] No metadata stream\n"); | |
886 | ret = -1; | |
887 | goto error; | |
888 | } | |
af701dc4 JD |
889 | metadata_stream->metadata_len = 0; |
890 | ret = open_metadata_fp_write(metadata_stream, metadata_buf, &size); | |
891 | if (ret < 0) { | |
892 | goto error; | |
893 | } | |
9abca178 JD |
894 | |
895 | do { | |
896 | /* | |
897 | * get_one_metadata_packet returns the number of bytes | |
898 | * received, 0 when we have received everything, a | |
899 | * negative value on error. | |
900 | */ | |
901 | ret = get_one_metadata_packet(ctx, metadata_stream); | |
c111d5d7 MD |
902 | if (ret > 0) { |
903 | len_read += ret; | |
904 | } | |
85e2085e MD |
905 | if (!len_read) { |
906 | (void) poll(NULL, 0, ACTIVE_POLL_DELAY); | |
907 | } | |
c111d5d7 | 908 | } while (ret > 0 || !len_read); |
9abca178 | 909 | |
7def295f MD |
910 | if (fclose(metadata_stream->metadata_fp_write)) |
911 | perror("fclose"); | |
af701dc4 JD |
912 | metadata_stream->metadata_fp_write = NULL; |
913 | ||
914 | error: | |
9abca178 JD |
915 | return ret; |
916 | } | |
917 | ||
4a744367 JD |
918 | /* |
919 | * Get one index for a stream. | |
920 | * | |
921 | * Returns 0 on success or a negative value on error. | |
922 | */ | |
923 | static | |
924 | int get_next_index(struct lttng_live_ctx *ctx, | |
925 | struct lttng_live_viewer_stream *viewer_stream, | |
926 | struct packet_index *index) | |
927 | { | |
928 | struct lttng_viewer_cmd cmd; | |
929 | struct lttng_viewer_get_next_index rq; | |
930 | struct lttng_viewer_index rp; | |
931 | int ret; | |
4a744367 JD |
932 | ssize_t ret_len; |
933 | ||
934 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_NEXT_INDEX); | |
935 | cmd.data_size = sizeof(rq); | |
936 | cmd.cmd_version = 0; | |
937 | ||
938 | memset(&rq, 0, sizeof(rq)); | |
939 | rq.stream_id = htobe64(viewer_stream->id); | |
940 | ||
941 | retry: | |
b7e8a8e1 | 942 | ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd)); |
4a744367 | 943 | if (ret_len < 0) { |
79620497 | 944 | perror("[error] Error sending cmd"); |
4a744367 JD |
945 | ret = ret_len; |
946 | goto error; | |
947 | } | |
948 | assert(ret_len == sizeof(cmd)); | |
949 | ||
b7e8a8e1 | 950 | ret_len = lttng_live_send(ctx->control_sock, &rq, sizeof(rq)); |
4a744367 | 951 | if (ret_len < 0) { |
79620497 | 952 | perror("[error] Error sending get_next_index request"); |
4a744367 JD |
953 | ret = ret_len; |
954 | goto error; | |
955 | } | |
956 | assert(ret_len == sizeof(rq)); | |
957 | ||
b7e8a8e1 | 958 | ret_len = lttng_live_recv(ctx->control_sock, &rp, sizeof(rp)); |
f8612f31 MD |
959 | if (ret_len == 0) { |
960 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
961 | ret = -1; | |
962 | goto error; | |
963 | } | |
4a744367 | 964 | if (ret_len < 0) { |
79620497 | 965 | perror("[error] Error receiving index response"); |
4a744367 JD |
966 | ret = ret_len; |
967 | goto error; | |
968 | } | |
969 | assert(ret_len == sizeof(rp)); | |
970 | ||
971 | rp.flags = be32toh(rp.flags); | |
972 | ||
973 | switch (be32toh(rp.status)) { | |
974 | case LTTNG_VIEWER_INDEX_INACTIVE: | |
975 | printf_verbose("get_next_index: inactive\n"); | |
976 | memset(index, 0, sizeof(struct packet_index)); | |
992e8cc0 | 977 | index->ts_cycles.timestamp_end = be64toh(rp.timestamp_end); |
4a744367 JD |
978 | break; |
979 | case LTTNG_VIEWER_INDEX_OK: | |
980 | printf_verbose("get_next_index: Ok, need metadata update : %u\n", | |
981 | rp.flags & LTTNG_VIEWER_FLAG_NEW_METADATA); | |
982 | index->offset = be64toh(rp.offset); | |
983 | index->packet_size = be64toh(rp.packet_size); | |
984 | index->content_size = be64toh(rp.content_size); | |
992e8cc0 MD |
985 | index->ts_cycles.timestamp_begin = be64toh(rp.timestamp_begin); |
986 | index->ts_cycles.timestamp_end = be64toh(rp.timestamp_end); | |
4a744367 JD |
987 | index->events_discarded = be64toh(rp.events_discarded); |
988 | ||
989 | if (rp.flags & LTTNG_VIEWER_FLAG_NEW_METADATA) { | |
50d207af JD |
990 | ret = append_metadata(ctx, viewer_stream); |
991 | if (ret) | |
4a744367 | 992 | goto error; |
4a744367 | 993 | } |
2acdc547 JD |
994 | if (rp.flags & LTTNG_VIEWER_FLAG_NEW_STREAM) { |
995 | ret = ask_new_streams(ctx); | |
996 | if (ret < 0) | |
997 | goto error; | |
4d4bf6eb MD |
998 | g_hash_table_foreach(ctx->session->ctf_traces, |
999 | add_traces, ctx->bt_ctx); | |
2acdc547 | 1000 | } |
4a744367 JD |
1001 | break; |
1002 | case LTTNG_VIEWER_INDEX_RETRY: | |
1003 | printf_verbose("get_next_index: retry\n"); | |
85e2085e | 1004 | (void) poll(NULL, 0, ACTIVE_POLL_DELAY); |
4a744367 JD |
1005 | goto retry; |
1006 | case LTTNG_VIEWER_INDEX_HUP: | |
1007 | printf_verbose("get_next_index: stream hung up\n"); | |
1008 | viewer_stream->id = -1ULL; | |
4a744367 | 1009 | index->offset = EOF; |
2acdc547 | 1010 | ctx->session->stream_count--; |
4a744367 JD |
1011 | break; |
1012 | case LTTNG_VIEWER_INDEX_ERR: | |
1013 | fprintf(stderr, "[error] get_next_index: error\n"); | |
1014 | ret = -1; | |
1015 | goto error; | |
1016 | default: | |
1017 | fprintf(stderr, "[error] get_next_index: unkwown value\n"); | |
1018 | ret = -1; | |
1019 | goto error; | |
1020 | } | |
1021 | ||
1022 | ret = 0; | |
1023 | ||
1024 | error: | |
1025 | return ret; | |
1026 | } | |
1027 | ||
b5a1fa45 | 1028 | static |
4a744367 JD |
1029 | void ctf_live_packet_seek(struct bt_stream_pos *stream_pos, size_t index, |
1030 | int whence) | |
1031 | { | |
1032 | struct ctf_stream_pos *pos; | |
1033 | struct ctf_file_stream *file_stream; | |
f1f52630 | 1034 | struct packet_index *prev_index = NULL, *cur_index; |
4a744367 JD |
1035 | struct lttng_live_viewer_stream *viewer_stream; |
1036 | struct lttng_live_session *session; | |
1037 | int ret; | |
1038 | ||
1039 | retry: | |
1040 | pos = ctf_pos(stream_pos); | |
1041 | file_stream = container_of(pos, struct ctf_file_stream, pos); | |
1042 | viewer_stream = (struct lttng_live_viewer_stream *) pos->priv; | |
1043 | session = viewer_stream->session; | |
1044 | ||
f1f52630 MD |
1045 | switch (pos->packet_index->len) { |
1046 | case 0: | |
1047 | g_array_set_size(pos->packet_index, 1); | |
1048 | cur_index = &g_array_index(pos->packet_index, | |
1049 | struct packet_index, 0); | |
1050 | break; | |
1051 | case 1: | |
1052 | g_array_set_size(pos->packet_index, 2); | |
1053 | prev_index = &g_array_index(pos->packet_index, | |
1054 | struct packet_index, 0); | |
1055 | cur_index = &g_array_index(pos->packet_index, | |
1056 | struct packet_index, 1); | |
1057 | break; | |
1058 | case 2: | |
1059 | g_array_index(pos->packet_index, | |
1060 | struct packet_index, 0) = | |
1061 | g_array_index(pos->packet_index, | |
1062 | struct packet_index, 1); | |
1063 | prev_index = &g_array_index(pos->packet_index, | |
1064 | struct packet_index, 0); | |
1065 | cur_index = &g_array_index(pos->packet_index, | |
1066 | struct packet_index, 1); | |
1067 | break; | |
1068 | default: | |
1069 | abort(); | |
1070 | break; | |
1071 | } | |
4a744367 | 1072 | printf_verbose("get_next_index for stream %" PRIu64 "\n", viewer_stream->id); |
f1f52630 | 1073 | ret = get_next_index(session->ctx, viewer_stream, cur_index); |
4a744367 JD |
1074 | if (ret < 0) { |
1075 | pos->offset = EOF; | |
1076 | fprintf(stderr, "[error] get_next_index failed\n"); | |
1077 | return; | |
1078 | } | |
1079 | ||
f1f52630 MD |
1080 | pos->packet_size = cur_index->packet_size; |
1081 | pos->content_size = cur_index->content_size; | |
4a744367 | 1082 | pos->mmap_base_offset = 0; |
f1f52630 | 1083 | if (cur_index->offset == EOF) { |
4a744367 JD |
1084 | pos->offset = EOF; |
1085 | } else { | |
1086 | pos->offset = 0; | |
1087 | } | |
1088 | ||
f1f52630 MD |
1089 | if (cur_index->content_size == 0) { |
1090 | file_stream->parent.cycles_timestamp = | |
1091 | cur_index->ts_cycles.timestamp_end; | |
4a744367 | 1092 | file_stream->parent.real_timestamp = ctf_get_real_timestamp( |
f1f52630 MD |
1093 | &file_stream->parent, |
1094 | cur_index->ts_cycles.timestamp_end); | |
4a744367 | 1095 | } else { |
f1f52630 MD |
1096 | /* Convert the timestamps and append to the real_index. */ |
1097 | cur_index->ts_real.timestamp_begin = ctf_get_real_timestamp( | |
1098 | &file_stream->parent, | |
1099 | cur_index->ts_cycles.timestamp_begin); | |
1100 | cur_index->ts_real.timestamp_end = ctf_get_real_timestamp( | |
1101 | &file_stream->parent, | |
1102 | cur_index->ts_cycles.timestamp_end); | |
1103 | ||
1104 | ctf_update_current_packet_index(&file_stream->parent, | |
1105 | prev_index, cur_index); | |
1106 | ||
1107 | file_stream->parent.cycles_timestamp = | |
1108 | cur_index->ts_cycles.timestamp_begin; | |
1109 | file_stream->parent.real_timestamp = | |
1110 | cur_index->ts_real.timestamp_begin; | |
4a744367 JD |
1111 | } |
1112 | ||
1113 | if (pos->packet_size == 0 || pos->offset == EOF) { | |
1114 | goto end; | |
1115 | } | |
1116 | ||
1117 | printf_verbose("get_data_packet for stream %" PRIu64 "\n", | |
1118 | viewer_stream->id); | |
1119 | ret = get_data_packet(session->ctx, pos, viewer_stream, | |
f1f52630 MD |
1120 | be64toh(cur_index->offset), |
1121 | cur_index->packet_size / CHAR_BIT); | |
4a744367 JD |
1122 | if (ret == -2) { |
1123 | goto retry; | |
1124 | } else if (ret < 0) { | |
1125 | pos->offset = EOF; | |
1126 | fprintf(stderr, "[error] get_data_packet failed\n"); | |
1127 | return; | |
1128 | } | |
1129 | ||
1130 | printf_verbose("Index received : packet_size : %" PRIu64 | |
1131 | ", offset %" PRIu64 ", content_size %" PRIu64 | |
1132 | ", timestamp_end : %" PRIu64 "\n", | |
f1f52630 MD |
1133 | cur_index->packet_size, cur_index->offset, |
1134 | cur_index->content_size, | |
1135 | cur_index->ts_cycles.timestamp_end); | |
4a744367 JD |
1136 | |
1137 | /* update trace_packet_header and stream_packet_context */ | |
1138 | if (pos->prot != PROT_WRITE && file_stream->parent.trace_packet_header) { | |
1139 | /* Read packet header */ | |
1140 | ret = generic_rw(&pos->parent, &file_stream->parent.trace_packet_header->p); | |
1141 | if (ret) { | |
1142 | pos->offset = EOF; | |
1143 | fprintf(stderr, "[error] trace packet header read failed\n"); | |
1144 | goto end; | |
1145 | } | |
1146 | } | |
1147 | if (pos->prot != PROT_WRITE && file_stream->parent.stream_packet_context) { | |
1148 | /* Read packet context */ | |
1149 | ret = generic_rw(&pos->parent, &file_stream->parent.stream_packet_context->p); | |
1150 | if (ret) { | |
1151 | pos->offset = EOF; | |
1152 | fprintf(stderr, "[error] stream packet context read failed\n"); | |
1153 | goto end; | |
1154 | } | |
1155 | } | |
1156 | pos->data_offset = pos->offset; | |
1157 | ||
1158 | end: | |
1159 | return; | |
1160 | } | |
1161 | ||
2acdc547 JD |
1162 | int lttng_live_create_viewer_session(struct lttng_live_ctx *ctx) |
1163 | { | |
1164 | struct lttng_viewer_cmd cmd; | |
1165 | struct lttng_viewer_create_session_response resp; | |
1166 | int ret; | |
1167 | ssize_t ret_len; | |
1168 | ||
1169 | cmd.cmd = htobe32(LTTNG_VIEWER_CREATE_SESSION); | |
1170 | cmd.data_size = 0; | |
1171 | cmd.cmd_version = 0; | |
1172 | ||
b7e8a8e1 | 1173 | ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd)); |
2acdc547 | 1174 | if (ret_len < 0) { |
79620497 | 1175 | perror("[error] Error sending cmd"); |
2acdc547 JD |
1176 | ret = ret_len; |
1177 | goto error; | |
1178 | } | |
1179 | assert(ret_len == sizeof(cmd)); | |
1180 | ||
b7e8a8e1 | 1181 | ret_len = lttng_live_recv(ctx->control_sock, &resp, sizeof(resp)); |
f8612f31 MD |
1182 | if (ret_len == 0) { |
1183 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
1184 | ret = -1; | |
1185 | goto error; | |
1186 | } | |
2acdc547 | 1187 | if (ret_len < 0) { |
79620497 | 1188 | perror("[error] Error receiving create session reply"); |
2acdc547 JD |
1189 | ret = ret_len; |
1190 | goto error; | |
1191 | } | |
1192 | assert(ret_len == sizeof(resp)); | |
1193 | ||
1194 | if (be32toh(resp.status) != LTTNG_VIEWER_CREATE_SESSION_OK) { | |
1195 | fprintf(stderr, "[error] Error creating viewer session\n"); | |
1196 | ret = -1; | |
1197 | goto error; | |
1198 | } | |
1199 | ret = 0; | |
1200 | ||
1201 | error: | |
1202 | return ret; | |
1203 | } | |
1204 | ||
1205 | static | |
1206 | int del_traces(gpointer key, gpointer value, gpointer user_data) | |
4a744367 JD |
1207 | { |
1208 | struct bt_context *bt_ctx = user_data; | |
1209 | struct lttng_live_ctf_trace *trace = value; | |
1210 | int ret; | |
1211 | ||
1212 | ret = bt_context_remove_trace(bt_ctx, trace->trace_id); | |
1213 | if (ret < 0) | |
1214 | fprintf(stderr, "[error] removing trace from context\n"); | |
1215 | ||
1216 | /* remove the key/value pair from the HT. */ | |
1217 | return 1; | |
1218 | } | |
1219 | ||
2acdc547 JD |
1220 | static |
1221 | void add_traces(gpointer key, gpointer value, gpointer user_data) | |
4a744367 | 1222 | { |
9abca178 | 1223 | int i, ret; |
4a744367 JD |
1224 | struct bt_context *bt_ctx = user_data; |
1225 | struct lttng_live_ctf_trace *trace = value; | |
1226 | struct lttng_live_viewer_stream *stream; | |
1227 | struct bt_mmap_stream *new_mmap_stream; | |
1228 | struct bt_mmap_stream_list mmap_list; | |
1229 | struct lttng_live_ctx *ctx = NULL; | |
150595c4 JD |
1230 | struct bt_trace_descriptor *td; |
1231 | struct bt_trace_handle *handle; | |
4a744367 | 1232 | |
b5a1fa45 JD |
1233 | /* |
1234 | * We don't know how many streams we will receive for a trace, so | |
1235 | * once we are done receiving the traces, we add all the traces | |
1236 | * received to the bt_context. | |
1237 | * We can receive streams during the attach command or the | |
1238 | * get_new_streams, so we have to make sure not to add multiple | |
1239 | * times the same traces. | |
1240 | * If a trace is already in the context, we just skip this function. | |
1241 | */ | |
2acdc547 JD |
1242 | if (trace->in_use) |
1243 | return; | |
1244 | ||
4a744367 JD |
1245 | BT_INIT_LIST_HEAD(&mmap_list.head); |
1246 | ||
1247 | for (i = 0; i < trace->streams->len; i++) { | |
1248 | stream = g_ptr_array_index(trace->streams, i); | |
1249 | ctx = stream->session->ctx; | |
1250 | ||
1251 | if (!stream->metadata_flag) { | |
1252 | new_mmap_stream = zmalloc(sizeof(struct bt_mmap_stream)); | |
1253 | new_mmap_stream->priv = (void *) stream; | |
1254 | new_mmap_stream->fd = -1; | |
1255 | bt_list_add(&new_mmap_stream->list, &mmap_list.head); | |
1256 | } else { | |
af701dc4 JD |
1257 | char *metadata_buf = NULL; |
1258 | ||
4a744367 | 1259 | /* Get all possible metadata before starting */ |
af701dc4 JD |
1260 | ret = get_new_metadata(ctx, stream, &metadata_buf); |
1261 | if (ret) { | |
1262 | free(metadata_buf); | |
1263 | goto end_free; | |
1264 | } | |
1265 | if (!stream->metadata_len) { | |
1266 | fprintf(stderr, "[error] empty metadata\n"); | |
1267 | ret = -1; | |
1268 | free(metadata_buf); | |
1269 | goto end_free; | |
1270 | } | |
1271 | ||
1272 | trace->metadata_fp = babeltrace_fmemopen(metadata_buf, | |
1273 | stream->metadata_len, "rb"); | |
1274 | if (!trace->metadata_fp) { | |
1275 | perror("Metadata fmemopen"); | |
1276 | ret = -1; | |
1277 | free(metadata_buf); | |
9abca178 | 1278 | goto end_free; |
af701dc4 | 1279 | } |
4a744367 JD |
1280 | } |
1281 | } | |
1282 | ||
1283 | if (!trace->metadata_fp) { | |
1284 | fprintf(stderr, "[error] No metadata stream opened\n"); | |
1285 | goto end_free; | |
1286 | } | |
1287 | ||
1288 | ret = bt_context_add_trace(bt_ctx, NULL, "ctf", | |
1289 | ctf_live_packet_seek, &mmap_list, trace->metadata_fp); | |
1290 | if (ret < 0) { | |
1291 | fprintf(stderr, "[error] Error adding trace\n"); | |
1292 | goto end_free; | |
1293 | } | |
af701dc4 JD |
1294 | trace->metadata_stream->metadata_len = 0; |
1295 | ||
150595c4 JD |
1296 | handle = (struct bt_trace_handle *) g_hash_table_lookup( |
1297 | bt_ctx->trace_handles, | |
1298 | (gpointer) (unsigned long) ret); | |
1299 | td = handle->td; | |
1300 | trace->handle = handle; | |
2acdc547 | 1301 | if (bt_ctx->current_iterator) { |
2acdc547 JD |
1302 | bt_iter_add_trace(bt_ctx->current_iterator, td); |
1303 | } | |
1304 | ||
4a744367 | 1305 | trace->trace_id = ret; |
2acdc547 | 1306 | trace->in_use = 1; |
4a744367 JD |
1307 | |
1308 | goto end; | |
1309 | ||
1310 | end_free: | |
1311 | bt_context_put(bt_ctx); | |
1312 | end: | |
1313 | return; | |
1314 | } | |
1315 | ||
2acdc547 | 1316 | int lttng_live_get_new_streams(struct lttng_live_ctx *ctx, uint64_t id) |
6192b988 JD |
1317 | { |
1318 | struct lttng_viewer_cmd cmd; | |
2acdc547 JD |
1319 | struct lttng_viewer_new_streams_request rq; |
1320 | struct lttng_viewer_new_streams_response rp; | |
1321 | struct lttng_viewer_stream stream; | |
1322 | int ret, i; | |
6192b988 | 1323 | ssize_t ret_len; |
b5a1fa45 | 1324 | uint32_t stream_count; |
6192b988 | 1325 | |
2acdc547 JD |
1326 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_NEW_STREAMS); |
1327 | cmd.data_size = sizeof(rq); | |
6192b988 JD |
1328 | cmd.cmd_version = 0; |
1329 | ||
2acdc547 JD |
1330 | memset(&rq, 0, sizeof(rq)); |
1331 | rq.session_id = htobe64(id); | |
1332 | ||
b7e8a8e1 | 1333 | ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd)); |
6192b988 | 1334 | if (ret_len < 0) { |
79620497 | 1335 | perror("[error] Error sending cmd"); |
6192b988 JD |
1336 | ret = ret_len; |
1337 | goto error; | |
1338 | } | |
1339 | assert(ret_len == sizeof(cmd)); | |
1340 | ||
b7e8a8e1 | 1341 | ret_len = lttng_live_send(ctx->control_sock, &rq, sizeof(rq)); |
6192b988 | 1342 | if (ret_len < 0) { |
79620497 | 1343 | perror("[error] Error sending get_new_streams request"); |
6192b988 JD |
1344 | ret = ret_len; |
1345 | goto error; | |
1346 | } | |
2acdc547 | 1347 | assert(ret_len == sizeof(rq)); |
6192b988 | 1348 | |
b7e8a8e1 | 1349 | ret_len = lttng_live_recv(ctx->control_sock, &rp, sizeof(rp)); |
f8612f31 MD |
1350 | if (ret_len == 0) { |
1351 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
1352 | ret = -1; | |
1353 | goto error; | |
1354 | } | |
2acdc547 | 1355 | if (ret_len < 0) { |
79620497 | 1356 | perror("[error] Error receiving get_new_streams response"); |
2acdc547 | 1357 | ret = ret_len; |
6192b988 JD |
1358 | goto error; |
1359 | } | |
2acdc547 JD |
1360 | assert(ret_len == sizeof(rp)); |
1361 | ||
1362 | switch(be32toh(rp.status)) { | |
1363 | case LTTNG_VIEWER_NEW_STREAMS_OK: | |
1364 | break; | |
1365 | case LTTNG_VIEWER_NEW_STREAMS_NO_NEW: | |
1366 | ret = 0; | |
1367 | goto end; | |
1368 | case LTTNG_VIEWER_NEW_STREAMS_HUP: | |
1369 | ret = -LTTNG_VIEWER_NEW_STREAMS_HUP; | |
1370 | goto end; | |
1371 | case LTTNG_VIEWER_NEW_STREAMS_ERR: | |
1372 | fprintf(stderr, "[error] get_new_streams error\n"); | |
1373 | ret = -1; | |
1374 | goto end; | |
1375 | default: | |
1376 | fprintf(stderr, "[error] Unknown return code %u\n", | |
1377 | be32toh(rp.status)); | |
1378 | ret = -1; | |
1379 | goto end; | |
1380 | } | |
1381 | ||
b5a1fa45 JD |
1382 | stream_count = be32toh(rp.streams_count); |
1383 | ctx->session->stream_count += stream_count; | |
2acdc547 JD |
1384 | /* |
1385 | * When the session is created but not started, we do an active wait | |
1386 | * until it starts. It allows the viewer to start processing the trace | |
1387 | * as soon as the session starts. | |
1388 | */ | |
1389 | if (ctx->session->stream_count == 0) { | |
1390 | ret = 0; | |
1391 | goto end; | |
1392 | } | |
1393 | printf_verbose("Waiting for %" PRIu64 " streams:\n", | |
1394 | ctx->session->stream_count); | |
1395 | ctx->session->streams = g_new0(struct lttng_live_viewer_stream, | |
1396 | ctx->session->stream_count); | |
b5a1fa45 | 1397 | for (i = 0; i < stream_count; i++) { |
b7e8a8e1 | 1398 | ret_len = lttng_live_recv(ctx->control_sock, &stream, sizeof(stream)); |
f8612f31 MD |
1399 | if (ret_len == 0) { |
1400 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
1401 | ret = -1; | |
1402 | goto error; | |
1403 | } | |
2acdc547 | 1404 | if (ret_len < 0) { |
79620497 | 1405 | perror("[error] Error receiving stream"); |
2acdc547 JD |
1406 | ret = ret_len; |
1407 | goto error; | |
1408 | } | |
1409 | assert(ret_len == sizeof(stream)); | |
1410 | stream.path_name[LTTNG_VIEWER_PATH_MAX - 1] = '\0'; | |
1411 | stream.channel_name[LTTNG_VIEWER_NAME_MAX - 1] = '\0'; | |
1412 | ||
1413 | printf_verbose(" stream %" PRIu64 " : %s/%s\n", | |
1414 | be64toh(stream.id), stream.path_name, | |
1415 | stream.channel_name); | |
1416 | ctx->session->streams[i].id = be64toh(stream.id); | |
1417 | ctx->session->streams[i].session = ctx->session; | |
1418 | ||
1419 | ctx->session->streams[i].first_read = 1; | |
1420 | ctx->session->streams[i].mmap_size = 0; | |
1421 | ||
1422 | if (be32toh(stream.metadata_flag)) { | |
2acdc547 | 1423 | ctx->session->streams[i].metadata_flag = 1; |
2acdc547 JD |
1424 | } |
1425 | ret = lttng_live_ctf_trace_assign(&ctx->session->streams[i], | |
1426 | be64toh(stream.ctf_trace_id)); | |
1427 | if (ret < 0) { | |
1428 | goto error; | |
1429 | } | |
1430 | ||
1431 | } | |
6192b988 JD |
1432 | ret = 0; |
1433 | ||
2acdc547 | 1434 | end: |
6192b988 JD |
1435 | error: |
1436 | return ret; | |
1437 | } | |
1438 | ||
2acdc547 | 1439 | void lttng_live_read(struct lttng_live_ctx *ctx) |
4a744367 | 1440 | { |
2acdc547 | 1441 | int ret, i; |
4a744367 JD |
1442 | struct bt_ctf_iter *iter; |
1443 | const struct bt_ctf_event *event; | |
1444 | struct bt_iter_pos begin_pos; | |
1445 | struct bt_trace_descriptor *td_write; | |
1446 | struct bt_format *fmt_write; | |
1447 | struct ctf_text_stream_pos *sout; | |
2acdc547 | 1448 | uint64_t id; |
4a744367 | 1449 | |
2acdc547 JD |
1450 | ctx->bt_ctx = bt_context_create(); |
1451 | if (!ctx->bt_ctx) { | |
4a744367 JD |
1452 | fprintf(stderr, "[error] bt_context_create allocation\n"); |
1453 | goto end; | |
1454 | } | |
1455 | ||
1456 | fmt_write = bt_lookup_format(g_quark_from_static_string("text")); | |
1457 | if (!fmt_write) { | |
1458 | fprintf(stderr, "[error] ctf-text error\n"); | |
1459 | goto end; | |
1460 | } | |
1461 | ||
1462 | td_write = fmt_write->open_trace(NULL, O_RDWR, NULL, NULL); | |
1463 | if (!td_write) { | |
1464 | fprintf(stderr, "[error] Error opening output trace\n"); | |
1465 | goto end_free; | |
1466 | } | |
1467 | ||
1468 | sout = container_of(td_write, struct ctf_text_stream_pos, | |
1469 | trace_descriptor); | |
85bb4663 | 1470 | if (!sout->parent.event_cb) { |
4a744367 | 1471 | goto end_free; |
85bb4663 | 1472 | } |
4a744367 | 1473 | |
6192b988 JD |
1474 | ret = lttng_live_create_viewer_session(ctx); |
1475 | if (ret < 0) { | |
1476 | goto end_free; | |
1477 | } | |
1478 | ||
2acdc547 JD |
1479 | for (i = 0; i < ctx->session_ids->len; i++) { |
1480 | id = g_array_index(ctx->session_ids, uint64_t, i); | |
1481 | printf_verbose("Attaching to session %lu\n", id); | |
1482 | ret = lttng_live_attach_session(ctx, id); | |
1483 | printf_verbose("Attaching session returns %d\n", ret); | |
1484 | if (ret < 0) { | |
1485 | if (ret == -LTTNG_VIEWER_ATTACH_UNK) { | |
1486 | fprintf(stderr, "[error] Unknown session ID\n"); | |
1487 | } | |
1488 | goto end_free; | |
1489 | } | |
1490 | } | |
1491 | ||
4a744367 | 1492 | /* |
2acdc547 | 1493 | * As long as the session is active, we try to get new streams. |
4a744367 | 1494 | */ |
2acdc547 | 1495 | for (;;) { |
4a744367 JD |
1496 | int flags; |
1497 | ||
2acdc547 | 1498 | while (!ctx->session->stream_count) { |
85bb4663 | 1499 | if (ctx->session_ids->len == 0) { |
4a744367 | 1500 | goto end_free; |
85bb4663 | 1501 | } |
2acdc547 | 1502 | ret = ask_new_streams(ctx); |
85bb4663 | 1503 | if (ret < 0) { |
2acdc547 | 1504 | goto end_free; |
85bb4663 MD |
1505 | } |
1506 | if (!ctx->session->stream_count) { | |
85e2085e | 1507 | (void) poll(NULL, 0, ACTIVE_POLL_DELAY); |
85bb4663 | 1508 | } |
2acdc547 | 1509 | } |
4a744367 | 1510 | |
2acdc547 JD |
1511 | g_hash_table_foreach(ctx->session->ctf_traces, add_traces, |
1512 | ctx->bt_ctx); | |
4a744367 JD |
1513 | |
1514 | begin_pos.type = BT_SEEK_BEGIN; | |
2acdc547 | 1515 | iter = bt_ctf_iter_create(ctx->bt_ctx, &begin_pos, NULL); |
4a744367 JD |
1516 | if (!iter) { |
1517 | fprintf(stderr, "[error] Iterator creation error\n"); | |
1518 | goto end; | |
1519 | } | |
1520 | for (;;) { | |
1521 | event = bt_ctf_iter_read_event_flags(iter, &flags); | |
1522 | if (!(flags & BT_ITER_FLAG_RETRY)) { | |
1523 | if (!event) { | |
1524 | /* End of trace */ | |
1525 | break; | |
1526 | } | |
1527 | ret = sout->parent.event_cb(&sout->parent, | |
1528 | event->parent->stream); | |
1529 | if (ret) { | |
1530 | fprintf(stderr, "[error] Writing " | |
1531 | "event failed.\n"); | |
1532 | goto end_free; | |
1533 | } | |
1534 | } | |
1535 | ret = bt_iter_next(bt_ctf_get_iter(iter)); | |
1536 | if (ret < 0) { | |
1537 | goto end_free; | |
1538 | } | |
1539 | } | |
1540 | bt_ctf_iter_destroy(iter); | |
2acdc547 JD |
1541 | g_hash_table_foreach_remove(ctx->session->ctf_traces, |
1542 | del_traces, ctx->bt_ctx); | |
1543 | ctx->session->stream_count = 0; | |
1544 | } | |
4a744367 JD |
1545 | |
1546 | end_free: | |
2acdc547 | 1547 | bt_context_put(ctx->bt_ctx); |
4a744367 JD |
1548 | end: |
1549 | return; | |
1550 | } |