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> | |
4a744367 JD |
29 | #include <stdlib.h> |
30 | #include <unistd.h> | |
31 | #include <errno.h> | |
32 | #include <inttypes.h> | |
33 | #include <fcntl.h> | |
85e2085e | 34 | #include <poll.h> |
4a744367 JD |
35 | |
36 | #include <babeltrace/ctf/ctf-index.h> | |
37 | ||
38 | #include <babeltrace/babeltrace.h> | |
39 | #include <babeltrace/ctf/events.h> | |
40 | #include <babeltrace/ctf/callbacks.h> | |
41 | #include <babeltrace/ctf/iterator.h> | |
42 | ||
43 | /* for packet_index */ | |
44 | #include <babeltrace/ctf/types.h> | |
45 | ||
46 | #include <babeltrace/ctf/metadata.h> | |
47 | #include <babeltrace/ctf-text/types.h> | |
48 | #include <babeltrace/ctf/events-internal.h> | |
49 | #include <formats/ctf/events-private.h> | |
50 | ||
62f11f74 | 51 | #include <babeltrace/endian.h> |
af701dc4 | 52 | #include <babeltrace/compat/memstream.h> |
7d4ab47d | 53 | #include <babeltrace/compat/send.h> |
832a0779 | 54 | #include <babeltrace/compat/string.h> |
5d620f61 | 55 | #include <babeltrace/compat/mman.h> |
f3e4505b | 56 | #include <babeltrace/babeltrace-internal.h> |
af701dc4 | 57 | |
c98627ca | 58 | #include "lttng-live.h" |
158eea6e | 59 | #include "lttng-viewer-abi.h" |
4a744367 | 60 | |
85e2085e MD |
61 | #define ACTIVE_POLL_DELAY 100 /* ms */ |
62 | ||
b5a1fa45 JD |
63 | static void ctf_live_packet_seek(struct bt_stream_pos *stream_pos, |
64 | size_t index, int whence); | |
bf6c9bd6 | 65 | static int add_traces(struct lttng_live_ctx *ctx); |
2acdc547 | 66 | static int del_traces(gpointer key, gpointer value, gpointer user_data); |
9abca178 | 67 | static int get_new_metadata(struct lttng_live_ctx *ctx, |
af701dc4 JD |
68 | struct lttng_live_viewer_stream *viewer_stream, |
69 | char **metadata_buf); | |
2acdc547 | 70 | |
b7e8a8e1 MD |
71 | static |
72 | ssize_t lttng_live_recv(int fd, void *buf, size_t len) | |
73 | { | |
74 | ssize_t ret; | |
75 | size_t copied = 0, to_copy = len; | |
76 | ||
77 | do { | |
78 | ret = recv(fd, buf + copied, to_copy, 0); | |
79 | if (ret > 0) { | |
80 | assert(ret <= to_copy); | |
81 | copied += ret; | |
82 | to_copy -= ret; | |
83 | } | |
84 | } while ((ret > 0 && to_copy > 0) | |
85 | || (ret < 0 && errno == EINTR)); | |
86 | if (ret > 0) | |
87 | ret = copied; | |
88 | /* ret = 0 means orderly shutdown, ret < 0 is error. */ | |
89 | return ret; | |
90 | } | |
91 | ||
92 | static | |
93 | ssize_t lttng_live_send(int fd, const void *buf, size_t len) | |
94 | { | |
95 | ssize_t ret; | |
96 | ||
97 | do { | |
7d4ab47d | 98 | ret = bt_send_nosigpipe(fd, buf, len); |
b7e8a8e1 MD |
99 | } while (ret < 0 && errno == EINTR); |
100 | return ret; | |
101 | } | |
102 | ||
b5a1fa45 | 103 | int lttng_live_connect_viewer(struct lttng_live_ctx *ctx) |
4a744367 JD |
104 | { |
105 | struct hostent *host; | |
106 | struct sockaddr_in server_addr; | |
107 | int ret; | |
108 | ||
8ace20bf | 109 | if (lttng_live_should_quit()) { |
4a744367 JD |
110 | ret = -1; |
111 | goto end; | |
112 | } | |
113 | ||
8ace20bf MD |
114 | host = gethostbyname(ctx->relay_hostname); |
115 | if (!host) { | |
116 | fprintf(stderr, "[error] Cannot lookup hostname %s\n", | |
117 | ctx->relay_hostname); | |
118 | goto error; | |
119 | } | |
120 | ||
4a744367 JD |
121 | if ((ctx->control_sock = socket(AF_INET, SOCK_STREAM, 0)) == -1) { |
122 | perror("Socket"); | |
8ace20bf | 123 | goto error; |
4a744367 JD |
124 | } |
125 | ||
126 | server_addr.sin_family = AF_INET; | |
b5a1fa45 | 127 | server_addr.sin_port = htons(ctx->port); |
4a744367 | 128 | server_addr.sin_addr = *((struct in_addr *) host->h_addr); |
167bce40 | 129 | memset(&(server_addr.sin_zero), 0, 8); |
4a744367 JD |
130 | |
131 | if (connect(ctx->control_sock, (struct sockaddr *) &server_addr, | |
132 | sizeof(struct sockaddr)) == -1) { | |
133 | perror("Connect"); | |
8ace20bf | 134 | goto error; |
4a744367 JD |
135 | } |
136 | ||
137 | ret = 0; | |
138 | ||
139 | end: | |
140 | return ret; | |
8ace20bf MD |
141 | |
142 | error: | |
143 | fprintf(stderr, "[error] Connection failed\n"); | |
144 | return -1; | |
4a744367 JD |
145 | } |
146 | ||
147 | int lttng_live_establish_connection(struct lttng_live_ctx *ctx) | |
148 | { | |
149 | struct lttng_viewer_cmd cmd; | |
150 | struct lttng_viewer_connect connect; | |
151 | int ret; | |
152 | ssize_t ret_len; | |
153 | ||
8ace20bf MD |
154 | if (lttng_live_should_quit()) { |
155 | ret = -1; | |
156 | goto end; | |
157 | } | |
158 | ||
4a744367 | 159 | cmd.cmd = htobe32(LTTNG_VIEWER_CONNECT); |
86c86ab8 | 160 | cmd.data_size = htobe64((uint64_t) sizeof(connect)); |
d8fefb9b | 161 | cmd.cmd_version = htobe32(0); |
4a744367 | 162 | |
0c3cd7e1 | 163 | connect.viewer_session_id = -1ULL; /* will be set on recv */ |
4a744367 JD |
164 | connect.major = htobe32(LTTNG_LIVE_MAJOR); |
165 | connect.minor = htobe32(LTTNG_LIVE_MINOR); | |
166 | connect.type = htobe32(LTTNG_VIEWER_CLIENT_COMMAND); | |
167 | ||
b7e8a8e1 | 168 | ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd)); |
4a744367 | 169 | if (ret_len < 0) { |
79620497 | 170 | perror("[error] Error sending cmd"); |
4a744367 JD |
171 | goto error; |
172 | } | |
173 | assert(ret_len == sizeof(cmd)); | |
174 | ||
b7e8a8e1 | 175 | ret_len = lttng_live_send(ctx->control_sock, &connect, sizeof(connect)); |
4a744367 | 176 | if (ret_len < 0) { |
79620497 | 177 | perror("[error] Error sending version"); |
4a744367 JD |
178 | goto error; |
179 | } | |
180 | assert(ret_len == sizeof(connect)); | |
181 | ||
b7e8a8e1 | 182 | ret_len = lttng_live_recv(ctx->control_sock, &connect, sizeof(connect)); |
f8612f31 MD |
183 | if (ret_len == 0) { |
184 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
185 | goto error; |
186 | } | |
4a744367 | 187 | if (ret_len < 0) { |
79620497 | 188 | perror("[error] Error receiving version"); |
4a744367 JD |
189 | goto error; |
190 | } | |
191 | assert(ret_len == sizeof(connect)); | |
192 | ||
193 | printf_verbose("Received viewer session ID : %" PRIu64 "\n", | |
194 | be64toh(connect.viewer_session_id)); | |
195 | printf_verbose("Relayd version : %u.%u\n", be32toh(connect.major), | |
196 | be32toh(connect.minor)); | |
0dfc7b62 JD |
197 | |
198 | if (LTTNG_LIVE_MAJOR != be32toh(connect.major)) { | |
199 | fprintf(stderr, "[error] Incompatible lttng-relayd protocol\n"); | |
200 | goto error; | |
201 | } | |
202 | /* Use the smallest protocol version implemented. */ | |
203 | if (LTTNG_LIVE_MINOR > be32toh(connect.minor)) { | |
204 | ctx->minor = be32toh(connect.minor); | |
205 | } else { | |
206 | ctx->minor = LTTNG_LIVE_MINOR; | |
207 | } | |
208 | ctx->major = LTTNG_LIVE_MAJOR; | |
4a744367 | 209 | ret = 0; |
8ace20bf MD |
210 | end: |
211 | return ret; | |
4a744367 JD |
212 | |
213 | error: | |
8ace20bf MD |
214 | fprintf(stderr, "[error] Unable to establish connection\n"); |
215 | return -1; | |
4a744367 JD |
216 | } |
217 | ||
b5a1fa45 JD |
218 | static |
219 | void free_session_list(GPtrArray *session_list) | |
220 | { | |
221 | int i; | |
222 | struct lttng_live_relay_session *relay_session; | |
223 | ||
224 | for (i = 0; i < session_list->len; i++) { | |
225 | relay_session = g_ptr_array_index(session_list, i); | |
226 | free(relay_session->name); | |
227 | free(relay_session->hostname); | |
228 | } | |
229 | g_ptr_array_free(session_list, TRUE); | |
230 | } | |
231 | ||
232 | static | |
233 | void print_session_list(GPtrArray *session_list, const char *path) | |
234 | { | |
235 | int i; | |
236 | struct lttng_live_relay_session *relay_session; | |
237 | ||
238 | for (i = 0; i < session_list->len; i++) { | |
239 | relay_session = g_ptr_array_index(session_list, i); | |
220e0cbe | 240 | fprintf(LTTNG_LIVE_OUTPUT_FP, "%s/host/%s/%s (timer = %u, " |
b5a1fa45 JD |
241 | "%u stream(s), %u client(s) connected)\n", |
242 | path, relay_session->hostname, | |
243 | relay_session->name, relay_session->timer, | |
244 | relay_session->streams, relay_session->clients); | |
245 | } | |
246 | } | |
247 | ||
248 | static | |
249 | void update_session_list(GPtrArray *session_list, char *hostname, | |
250 | char *session_name, uint32_t streams, uint32_t clients, | |
251 | uint32_t timer) | |
252 | { | |
253 | int i, found = 0; | |
254 | struct lttng_live_relay_session *relay_session; | |
255 | ||
256 | for (i = 0; i < session_list->len; i++) { | |
257 | relay_session = g_ptr_array_index(session_list, i); | |
c648b799 | 258 | if ((strncmp(relay_session->hostname, hostname, MAXNAMLEN) == 0) && |
b5a1fa45 | 259 | strncmp(relay_session->name, |
c648b799 | 260 | session_name, MAXNAMLEN) == 0) { |
b5a1fa45 JD |
261 | relay_session->streams += streams; |
262 | if (relay_session->clients < clients) | |
263 | relay_session->clients = clients; | |
264 | found = 1; | |
265 | break; | |
266 | } | |
267 | } | |
268 | if (found) | |
269 | return; | |
270 | ||
271 | relay_session = g_new0(struct lttng_live_relay_session, 1); | |
832a0779 MJ |
272 | relay_session->hostname = bt_strndup(hostname, MAXNAMLEN); |
273 | relay_session->name = bt_strndup(session_name, MAXNAMLEN); | |
b5a1fa45 JD |
274 | relay_session->clients = clients; |
275 | relay_session->streams = streams; | |
276 | relay_session->timer = timer; | |
277 | g_ptr_array_add(session_list, relay_session); | |
278 | } | |
279 | ||
4a744367 JD |
280 | int lttng_live_list_sessions(struct lttng_live_ctx *ctx, const char *path) |
281 | { | |
282 | struct lttng_viewer_cmd cmd; | |
283 | struct lttng_viewer_list_sessions list; | |
284 | struct lttng_viewer_session lsession; | |
b5a1fa45 | 285 | int i, ret, sessions_count, print_list = 0; |
4a744367 | 286 | ssize_t ret_len; |
b5a1fa45 JD |
287 | uint64_t session_id; |
288 | GPtrArray *session_list = NULL; | |
289 | ||
8ace20bf MD |
290 | if (lttng_live_should_quit()) { |
291 | ret = -1; | |
292 | goto end; | |
293 | } | |
294 | ||
b5a1fa45 JD |
295 | if (strlen(ctx->session_name) == 0) { |
296 | print_list = 1; | |
297 | session_list = g_ptr_array_new(); | |
298 | } | |
4a744367 JD |
299 | |
300 | cmd.cmd = htobe32(LTTNG_VIEWER_LIST_SESSIONS); | |
86c86ab8 | 301 | cmd.data_size = htobe64((uint64_t) 0); |
d8fefb9b | 302 | cmd.cmd_version = htobe32(0); |
4a744367 | 303 | |
b7e8a8e1 | 304 | ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd)); |
4a744367 | 305 | if (ret_len < 0) { |
79620497 | 306 | perror("[error] Error sending cmd"); |
4a744367 JD |
307 | goto error; |
308 | } | |
309 | assert(ret_len == sizeof(cmd)); | |
310 | ||
b7e8a8e1 | 311 | ret_len = lttng_live_recv(ctx->control_sock, &list, sizeof(list)); |
f8612f31 MD |
312 | if (ret_len == 0) { |
313 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
314 | goto error; |
315 | } | |
4a744367 | 316 | if (ret_len < 0) { |
79620497 | 317 | perror("[error] Error receiving session list"); |
4a744367 JD |
318 | goto error; |
319 | } | |
320 | assert(ret_len == sizeof(list)); | |
321 | ||
322 | sessions_count = be32toh(list.sessions_count); | |
4a744367 | 323 | for (i = 0; i < sessions_count; i++) { |
b7e8a8e1 | 324 | ret_len = lttng_live_recv(ctx->control_sock, &lsession, sizeof(lsession)); |
f8612f31 MD |
325 | if (ret_len == 0) { |
326 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
327 | goto error; |
328 | } | |
4a744367 | 329 | if (ret_len < 0) { |
79620497 | 330 | perror("[error] Error receiving session"); |
4a744367 JD |
331 | goto error; |
332 | } | |
333 | assert(ret_len == sizeof(lsession)); | |
9ed31e53 MD |
334 | lsession.hostname[LTTNG_VIEWER_HOST_NAME_MAX - 1] = '\0'; |
335 | lsession.session_name[LTTNG_VIEWER_NAME_MAX - 1] = '\0'; | |
b5a1fa45 JD |
336 | session_id = be64toh(lsession.id); |
337 | ||
338 | if (print_list) { | |
339 | update_session_list(session_list, | |
340 | lsession.hostname, | |
341 | lsession.session_name, | |
342 | be32toh(lsession.streams), | |
343 | be32toh(lsession.clients), | |
344 | be32toh(lsession.live_timer)); | |
345 | } else { | |
346 | if ((strncmp(lsession.session_name, ctx->session_name, | |
c648b799 MJ |
347 | MAXNAMLEN) == 0) && (strncmp(lsession.hostname, |
348 | ctx->traced_hostname, MAXNAMLEN) == 0)) { | |
b5a1fa45 JD |
349 | printf_verbose("Reading from session %" PRIu64 "\n", |
350 | session_id); | |
351 | g_array_append_val(ctx->session_ids, | |
352 | session_id); | |
353 | } | |
354 | } | |
355 | } | |
4a744367 | 356 | |
b5a1fa45 JD |
357 | if (print_list) { |
358 | print_session_list(session_list, path); | |
359 | free_session_list(session_list); | |
4a744367 | 360 | } |
4a744367 | 361 | ret = 0; |
8ace20bf MD |
362 | end: |
363 | return ret; | |
4a744367 JD |
364 | |
365 | error: | |
8ace20bf MD |
366 | fprintf(stderr, "[error] Unable to list sessions\n"); |
367 | return -1; | |
4a744367 JD |
368 | } |
369 | ||
370 | int lttng_live_ctf_trace_assign(struct lttng_live_viewer_stream *stream, | |
371 | uint64_t ctf_trace_id) | |
372 | { | |
373 | struct lttng_live_ctf_trace *trace; | |
374 | int ret = 0; | |
375 | ||
376 | trace = g_hash_table_lookup(stream->session->ctf_traces, | |
cbc14b73 | 377 | &ctf_trace_id); |
4a744367 JD |
378 | if (!trace) { |
379 | trace = g_new0(struct lttng_live_ctf_trace, 1); | |
4a744367 JD |
380 | trace->ctf_trace_id = ctf_trace_id; |
381 | trace->streams = g_ptr_array_new(); | |
382 | g_hash_table_insert(stream->session->ctf_traces, | |
cbc14b73 | 383 | &trace->ctf_trace_id, |
4a744367 JD |
384 | trace); |
385 | } | |
386 | if (stream->metadata_flag) | |
387 | trace->metadata_stream = stream; | |
388 | ||
389 | stream->ctf_trace = trace; | |
390 | g_ptr_array_add(trace->streams, stream); | |
391 | ||
4a744367 JD |
392 | return ret; |
393 | } | |
394 | ||
af701dc4 JD |
395 | static |
396 | int open_metadata_fp_write(struct lttng_live_viewer_stream *stream, | |
397 | char **metadata_buf, size_t *size) | |
398 | { | |
399 | int ret = 0; | |
400 | ||
401 | stream->metadata_fp_write = | |
0cbbc8b8 | 402 | bt_open_memstream(metadata_buf, size); |
af701dc4 JD |
403 | if (!stream->metadata_fp_write) { |
404 | perror("Metadata open_memstream"); | |
405 | ret = -1; | |
406 | } | |
407 | ||
408 | return ret; | |
409 | } | |
410 | ||
4a744367 JD |
411 | int lttng_live_attach_session(struct lttng_live_ctx *ctx, uint64_t id) |
412 | { | |
413 | struct lttng_viewer_cmd cmd; | |
414 | struct lttng_viewer_attach_session_request rq; | |
415 | struct lttng_viewer_attach_session_response rp; | |
416 | struct lttng_viewer_stream stream; | |
417 | int ret, i; | |
418 | ssize_t ret_len; | |
419 | ||
8ace20bf MD |
420 | if (lttng_live_should_quit()) { |
421 | ret = -1; | |
422 | goto end; | |
423 | } | |
424 | ||
4a744367 | 425 | cmd.cmd = htobe32(LTTNG_VIEWER_ATTACH_SESSION); |
86c86ab8 | 426 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); |
d8fefb9b | 427 | cmd.cmd_version = htobe32(0); |
4a744367 JD |
428 | |
429 | memset(&rq, 0, sizeof(rq)); | |
430 | rq.session_id = htobe64(id); | |
431 | // TODO: add cmd line parameter to select seek beginning | |
432 | // rq.seek = htobe32(LTTNG_VIEWER_SEEK_BEGINNING); | |
433 | rq.seek = htobe32(LTTNG_VIEWER_SEEK_LAST); | |
434 | ||
b7e8a8e1 | 435 | ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd)); |
4a744367 | 436 | if (ret_len < 0) { |
79620497 | 437 | perror("[error] Error sending cmd"); |
4a744367 JD |
438 | goto error; |
439 | } | |
440 | assert(ret_len == sizeof(cmd)); | |
441 | ||
b7e8a8e1 | 442 | ret_len = lttng_live_send(ctx->control_sock, &rq, sizeof(rq)); |
4a744367 | 443 | if (ret_len < 0) { |
79620497 | 444 | perror("[error] Error sending attach request"); |
4a744367 JD |
445 | goto error; |
446 | } | |
447 | assert(ret_len == sizeof(rq)); | |
448 | ||
b7e8a8e1 | 449 | ret_len = lttng_live_recv(ctx->control_sock, &rp, sizeof(rp)); |
f8612f31 MD |
450 | if (ret_len == 0) { |
451 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
452 | goto error; |
453 | } | |
4a744367 | 454 | if (ret_len < 0) { |
79620497 | 455 | perror("[error] Error receiving attach response"); |
4a744367 JD |
456 | goto error; |
457 | } | |
458 | assert(ret_len == sizeof(rp)); | |
459 | ||
460 | switch(be32toh(rp.status)) { | |
461 | case LTTNG_VIEWER_ATTACH_OK: | |
462 | break; | |
463 | case LTTNG_VIEWER_ATTACH_UNK: | |
464 | ret = -LTTNG_VIEWER_ATTACH_UNK; | |
465 | goto end; | |
466 | case LTTNG_VIEWER_ATTACH_ALREADY: | |
79620497 | 467 | fprintf(stderr, "[error] There is already a viewer attached to this session\n"); |
8ace20bf | 468 | goto error; |
4a744367 JD |
469 | case LTTNG_VIEWER_ATTACH_NOT_LIVE: |
470 | fprintf(stderr, "[error] Not a live session\n"); | |
8ace20bf | 471 | goto error; |
4a744367 JD |
472 | case LTTNG_VIEWER_ATTACH_SEEK_ERR: |
473 | fprintf(stderr, "[error] Wrong seek parameter\n"); | |
8ace20bf | 474 | goto error; |
4a744367 JD |
475 | default: |
476 | fprintf(stderr, "[error] Unknown attach return code %u\n", | |
477 | be32toh(rp.status)); | |
8ace20bf | 478 | goto error; |
4a744367 JD |
479 | } |
480 | if (be32toh(rp.status) != LTTNG_VIEWER_ATTACH_OK) { | |
8ace20bf | 481 | goto error; |
4a744367 JD |
482 | } |
483 | ||
2acdc547 | 484 | ctx->session->stream_count += be32toh(rp.streams_count); |
4a744367 JD |
485 | /* |
486 | * When the session is created but not started, we do an active wait | |
487 | * until it starts. It allows the viewer to start processing the trace | |
488 | * as soon as the session starts. | |
489 | */ | |
490 | if (ctx->session->stream_count == 0) { | |
491 | ret = 0; | |
492 | goto end; | |
493 | } | |
494 | printf_verbose("Waiting for %" PRIu64 " streams:\n", | |
495 | ctx->session->stream_count); | |
496 | ctx->session->streams = g_new0(struct lttng_live_viewer_stream, | |
497 | ctx->session->stream_count); | |
4a744367 | 498 | for (i = 0; i < be32toh(rp.streams_count); i++) { |
b7e8a8e1 | 499 | ret_len = lttng_live_recv(ctx->control_sock, &stream, sizeof(stream)); |
f8612f31 MD |
500 | if (ret_len == 0) { |
501 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
502 | goto error; |
503 | } | |
4a744367 | 504 | if (ret_len < 0) { |
79620497 | 505 | perror("[error] Error receiving stream"); |
4a744367 JD |
506 | goto error; |
507 | } | |
508 | assert(ret_len == sizeof(stream)); | |
9ed31e53 MD |
509 | stream.path_name[LTTNG_VIEWER_PATH_MAX - 1] = '\0'; |
510 | stream.channel_name[LTTNG_VIEWER_NAME_MAX - 1] = '\0'; | |
4a744367 JD |
511 | |
512 | printf_verbose(" stream %" PRIu64 " : %s/%s\n", | |
513 | be64toh(stream.id), stream.path_name, | |
514 | stream.channel_name); | |
515 | ctx->session->streams[i].id = be64toh(stream.id); | |
516 | ctx->session->streams[i].session = ctx->session; | |
517 | ||
4a744367 | 518 | ctx->session->streams[i].mmap_size = 0; |
5805251d | 519 | ctx->session->streams[i].ctf_stream_id = -1ULL; |
4a744367 JD |
520 | |
521 | if (be32toh(stream.metadata_flag)) { | |
4a744367 | 522 | ctx->session->streams[i].metadata_flag = 1; |
4a744367 JD |
523 | } |
524 | ret = lttng_live_ctf_trace_assign(&ctx->session->streams[i], | |
525 | be64toh(stream.ctf_trace_id)); | |
526 | if (ret < 0) { | |
527 | goto error; | |
528 | } | |
529 | ||
530 | } | |
531 | ret = 0; | |
4a744367 | 532 | end: |
4a744367 | 533 | return ret; |
8ace20bf MD |
534 | |
535 | error: | |
536 | return -1; | |
4a744367 JD |
537 | } |
538 | ||
43273943 JD |
539 | /* |
540 | * Ask the relay for new streams. | |
541 | * | |
542 | * Returns the number of new streams received or a negative value on error. | |
543 | */ | |
2acdc547 JD |
544 | static |
545 | int ask_new_streams(struct lttng_live_ctx *ctx) | |
546 | { | |
43273943 | 547 | int i, ret = 0, nb_streams = 0; |
2acdc547 JD |
548 | uint64_t id; |
549 | ||
550 | restart: | |
551 | for (i = 0; i < ctx->session_ids->len; i++) { | |
552 | id = g_array_index(ctx->session_ids, uint64_t, i); | |
553 | ret = lttng_live_get_new_streams(ctx, id); | |
43273943 | 554 | printf_verbose("Asking for new streams returns %d\n", ret); |
2acdc547 | 555 | if (ret < 0) { |
f28fb4b6 JG |
556 | if (lttng_live_should_quit()) { |
557 | goto end; | |
558 | } | |
2acdc547 JD |
559 | if (ret == -LTTNG_VIEWER_NEW_STREAMS_HUP) { |
560 | printf_verbose("Session %" PRIu64 " closed\n", | |
561 | id); | |
b5a1fa45 JD |
562 | /* |
563 | * The streams have already been closed during | |
564 | * the reading, so we only need to get rid of | |
565 | * the trace in our internal table of sessions. | |
566 | */ | |
2acdc547 JD |
567 | g_array_remove_index(ctx->session_ids, i); |
568 | /* | |
569 | * We can't continue iterating on the g_array | |
570 | * after a remove, we have to start again. | |
571 | */ | |
572 | goto restart; | |
573 | } else { | |
574 | ret = -1; | |
575 | goto end; | |
576 | } | |
43273943 JD |
577 | } else { |
578 | nb_streams += ret; | |
2acdc547 JD |
579 | } |
580 | } | |
43273943 | 581 | ret = nb_streams; |
2acdc547 JD |
582 | |
583 | end: | |
584 | return ret; | |
585 | } | |
586 | ||
50d207af JD |
587 | static |
588 | int append_metadata(struct lttng_live_ctx *ctx, | |
589 | struct lttng_live_viewer_stream *viewer_stream) | |
590 | { | |
591 | int ret; | |
592 | struct lttng_live_viewer_stream *metadata; | |
593 | char *metadata_buf = NULL; | |
594 | ||
595 | printf_verbose("get_next_index: new metadata needed\n"); | |
596 | ret = get_new_metadata(ctx, viewer_stream, &metadata_buf); | |
597 | if (ret < 0) { | |
598 | free(metadata_buf); | |
599 | goto error; | |
600 | } | |
601 | ||
602 | metadata = viewer_stream->ctf_trace->metadata_stream; | |
603 | metadata->ctf_trace->metadata_fp = | |
0cbbc8b8 | 604 | bt_fmemopen(metadata_buf, |
50d207af JD |
605 | metadata->metadata_len, "rb"); |
606 | if (!metadata->ctf_trace->metadata_fp) { | |
607 | perror("Metadata fmemopen"); | |
608 | free(metadata_buf); | |
609 | ret = -1; | |
610 | goto error; | |
611 | } | |
612 | ret = ctf_append_trace_metadata( | |
613 | viewer_stream->ctf_trace->handle->td, | |
614 | metadata->ctf_trace->metadata_fp); | |
251fc08c MD |
615 | /* We accept empty metadata packets */ |
616 | if (ret != 0 && ret != -ENOENT) { | |
50d207af JD |
617 | fprintf(stderr, "[error] Appending metadata\n"); |
618 | goto error; | |
619 | } | |
251fc08c | 620 | ret = 0; |
50d207af JD |
621 | |
622 | error: | |
623 | return ret; | |
624 | } | |
625 | ||
4a744367 JD |
626 | static |
627 | int get_data_packet(struct lttng_live_ctx *ctx, | |
628 | struct ctf_stream_pos *pos, | |
629 | struct lttng_live_viewer_stream *stream, uint64_t offset, | |
630 | uint64_t len) | |
631 | { | |
632 | struct lttng_viewer_cmd cmd; | |
633 | struct lttng_viewer_get_packet rq; | |
634 | struct lttng_viewer_trace_packet rp; | |
635 | ssize_t ret_len; | |
636 | int ret; | |
637 | ||
50d207af | 638 | retry: |
8ace20bf MD |
639 | if (lttng_live_should_quit()) { |
640 | ret = -1; | |
641 | goto end; | |
642 | } | |
220e0cbe | 643 | |
4a744367 | 644 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_PACKET); |
86c86ab8 | 645 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); |
d8fefb9b | 646 | cmd.cmd_version = htobe32(0); |
4a744367 JD |
647 | |
648 | memset(&rq, 0, sizeof(rq)); | |
649 | rq.stream_id = htobe64(stream->id); | |
c1e8ac81 | 650 | rq.offset = htobe64(offset); |
4a744367 JD |
651 | rq.len = htobe32(len); |
652 | ||
b7e8a8e1 | 653 | ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd)); |
4a744367 | 654 | if (ret_len < 0) { |
79620497 | 655 | perror("[error] Error sending cmd"); |
4a744367 JD |
656 | goto error; |
657 | } | |
658 | assert(ret_len == sizeof(cmd)); | |
659 | ||
b7e8a8e1 | 660 | ret_len = lttng_live_send(ctx->control_sock, &rq, sizeof(rq)); |
4a744367 | 661 | if (ret_len < 0) { |
79620497 | 662 | perror("[error] Error sending get_data_packet request"); |
4a744367 JD |
663 | goto error; |
664 | } | |
665 | assert(ret_len == sizeof(rq)); | |
666 | ||
b7e8a8e1 | 667 | ret_len = lttng_live_recv(ctx->control_sock, &rp, sizeof(rp)); |
f8612f31 MD |
668 | if (ret_len == 0) { |
669 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
670 | goto error; |
671 | } | |
4a744367 | 672 | if (ret_len < 0) { |
79620497 | 673 | perror("[error] Error receiving data response"); |
4a744367 JD |
674 | goto error; |
675 | } | |
57b9d843 | 676 | if (ret_len != sizeof(rp)) { |
7c72a3fb MD |
677 | fprintf(stderr, "[error] get_data_packet: expected %zu" |
678 | ", received %zd\n", sizeof(rp), | |
a5e4b11e | 679 | ret_len); |
57b9d843 JD |
680 | goto error; |
681 | } | |
4a744367 JD |
682 | |
683 | rp.flags = be32toh(rp.flags); | |
684 | ||
685 | switch (be32toh(rp.status)) { | |
686 | case LTTNG_VIEWER_GET_PACKET_OK: | |
687 | len = be32toh(rp.len); | |
688 | printf_verbose("get_data_packet: Ok, packet size : %" PRIu64 | |
689 | "\n", len); | |
690 | break; | |
691 | case LTTNG_VIEWER_GET_PACKET_RETRY: | |
8ace20bf | 692 | /* Unimplemented by relay daemon */ |
4a744367 | 693 | printf_verbose("get_data_packet: retry\n"); |
8ace20bf | 694 | goto error; |
4a744367 JD |
695 | case LTTNG_VIEWER_GET_PACKET_ERR: |
696 | if (rp.flags & LTTNG_VIEWER_FLAG_NEW_METADATA) { | |
697 | printf_verbose("get_data_packet: new metadata needed\n"); | |
50d207af JD |
698 | ret = append_metadata(ctx, stream); |
699 | if (ret) | |
700 | goto error; | |
4a744367 | 701 | } |
2acdc547 | 702 | if (rp.flags & LTTNG_VIEWER_FLAG_NEW_STREAM) { |
f312b3aa | 703 | printf_verbose("get_data_packet: new streams needed\n"); |
2acdc547 | 704 | ret = ask_new_streams(ctx); |
bf6c9bd6 | 705 | if (ret < 0) { |
2acdc547 | 706 | goto error; |
bf6c9bd6 JD |
707 | } else if (ret > 0) { |
708 | ret = add_traces(ctx); | |
709 | if (ret < 0) { | |
710 | goto error; | |
711 | } | |
712 | } | |
2acdc547 | 713 | } |
f312b3aa MD |
714 | if (rp.flags & (LTTNG_VIEWER_FLAG_NEW_METADATA |
715 | | LTTNG_VIEWER_FLAG_NEW_STREAM)) { | |
716 | goto retry; | |
717 | } | |
4a744367 | 718 | fprintf(stderr, "[error] get_data_packet: error\n"); |
8ace20bf | 719 | goto error; |
4a744367 JD |
720 | case LTTNG_VIEWER_GET_PACKET_EOF: |
721 | ret = -2; | |
8ace20bf | 722 | goto end; |
4a744367 JD |
723 | default: |
724 | printf_verbose("get_data_packet: unknown\n"); | |
8ace20bf | 725 | goto error; |
4a744367 JD |
726 | } |
727 | ||
65ae9a82 | 728 | if (len == 0) { |
96943040 | 729 | goto error; |
4a744367 JD |
730 | } |
731 | ||
732 | if (len > stream->mmap_size) { | |
733 | uint64_t new_size; | |
734 | ||
735 | new_size = max_t(uint64_t, len, stream->mmap_size << 1); | |
736 | if (pos->base_mma) { | |
737 | /* unmap old base */ | |
738 | ret = munmap_align(pos->base_mma); | |
739 | if (ret) { | |
79620497 | 740 | perror("[error] Unable to unmap old base"); |
4a744367 JD |
741 | goto error; |
742 | } | |
743 | pos->base_mma = NULL; | |
744 | } | |
745 | pos->base_mma = mmap_align(new_size, | |
746 | PROT_READ | PROT_WRITE, | |
747 | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); | |
748 | if (pos->base_mma == MAP_FAILED) { | |
79620497 | 749 | perror("[error] mmap error"); |
4a744367 | 750 | pos->base_mma = NULL; |
4a744367 JD |
751 | goto error; |
752 | } | |
753 | ||
754 | stream->mmap_size = new_size; | |
755 | printf_verbose("Expanding stream mmap size to %" PRIu64 " bytes\n", | |
756 | stream->mmap_size); | |
757 | } | |
758 | ||
b7e8a8e1 MD |
759 | ret_len = lttng_live_recv(ctx->control_sock, |
760 | mmap_align_addr(pos->base_mma), len); | |
f8612f31 MD |
761 | if (ret_len == 0) { |
762 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
763 | goto error; |
764 | } | |
4a744367 | 765 | if (ret_len < 0) { |
79620497 | 766 | perror("[error] Error receiving trace packet"); |
4a744367 JD |
767 | goto error; |
768 | } | |
769 | assert(ret_len == len); | |
f312b3aa | 770 | ret = 0; |
4a744367 | 771 | end: |
4a744367 | 772 | return ret; |
8ace20bf MD |
773 | |
774 | error: | |
775 | return -1; | |
4a744367 JD |
776 | } |
777 | ||
4a744367 | 778 | static |
9abca178 JD |
779 | int get_one_metadata_packet(struct lttng_live_ctx *ctx, |
780 | struct lttng_live_viewer_stream *metadata_stream) | |
4a744367 JD |
781 | { |
782 | uint64_t len = 0; | |
783 | int ret; | |
784 | struct lttng_viewer_cmd cmd; | |
785 | struct lttng_viewer_get_metadata rq; | |
786 | struct lttng_viewer_metadata_packet rp; | |
4a744367 JD |
787 | char *data = NULL; |
788 | ssize_t ret_len; | |
789 | ||
8ace20bf MD |
790 | if (lttng_live_should_quit()) { |
791 | ret = -1; | |
792 | goto end; | |
793 | } | |
794 | ||
9abca178 | 795 | rq.stream_id = htobe64(metadata_stream->id); |
4a744367 | 796 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_METADATA); |
86c86ab8 | 797 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); |
d8fefb9b | 798 | cmd.cmd_version = htobe32(0); |
4a744367 | 799 | |
b7e8a8e1 | 800 | ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd)); |
4a744367 | 801 | if (ret_len < 0) { |
79620497 | 802 | perror("[error] Error sending cmd"); |
4a744367 JD |
803 | goto error; |
804 | } | |
805 | assert(ret_len == sizeof(cmd)); | |
806 | ||
b7e8a8e1 | 807 | ret_len = lttng_live_send(ctx->control_sock, &rq, sizeof(rq)); |
4a744367 | 808 | if (ret_len < 0) { |
79620497 | 809 | perror("[error] Error sending get_metadata request"); |
4a744367 JD |
810 | goto error; |
811 | } | |
812 | assert(ret_len == sizeof(rq)); | |
813 | ||
b7e8a8e1 | 814 | ret_len = lttng_live_recv(ctx->control_sock, &rp, sizeof(rp)); |
f8612f31 MD |
815 | if (ret_len == 0) { |
816 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
817 | goto error; |
818 | } | |
4a744367 | 819 | if (ret_len < 0) { |
79620497 | 820 | perror("[error] Error receiving metadata response"); |
4a744367 JD |
821 | goto error; |
822 | } | |
823 | assert(ret_len == sizeof(rp)); | |
824 | ||
825 | switch (be32toh(rp.status)) { | |
826 | case LTTNG_VIEWER_METADATA_OK: | |
827 | printf_verbose("get_metadata : OK\n"); | |
828 | break; | |
829 | case LTTNG_VIEWER_NO_NEW_METADATA: | |
830 | printf_verbose("get_metadata : NO NEW\n"); | |
9abca178 | 831 | ret = 0; |
4a744367 JD |
832 | goto end; |
833 | case LTTNG_VIEWER_METADATA_ERR: | |
834 | printf_verbose("get_metadata : ERR\n"); | |
8ace20bf | 835 | goto error; |
4a744367 JD |
836 | default: |
837 | printf_verbose("get_metadata : UNKNOWN\n"); | |
8ace20bf | 838 | goto error; |
4a744367 JD |
839 | } |
840 | ||
841 | len = be64toh(rp.len); | |
842 | printf_verbose("Writing %" PRIu64" bytes to metadata\n", len); | |
843 | if (len <= 0) { | |
8ace20bf | 844 | goto error; |
4a744367 JD |
845 | } |
846 | ||
847 | data = zmalloc(len); | |
848 | if (!data) { | |
849 | perror("relay data zmalloc"); | |
4a744367 JD |
850 | goto error; |
851 | } | |
b7e8a8e1 | 852 | ret_len = lttng_live_recv(ctx->control_sock, data, len); |
f8612f31 MD |
853 | if (ret_len == 0) { |
854 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
8ace20bf | 855 | goto error_free_data; |
f8612f31 | 856 | } |
4a744367 | 857 | if (ret_len < 0) { |
79620497 | 858 | perror("[error] Error receiving trace packet"); |
8ace20bf | 859 | goto error_free_data; |
4a744367 JD |
860 | } |
861 | assert(ret_len == len); | |
862 | ||
863 | do { | |
af701dc4 JD |
864 | ret_len = fwrite(data, 1, len, |
865 | metadata_stream->metadata_fp_write); | |
4a744367 JD |
866 | } while (ret_len < 0 && errno == EINTR); |
867 | if (ret_len < 0) { | |
af701dc4 | 868 | fprintf(stderr, "[error] Writing in the metadata fp\n"); |
8ace20bf | 869 | goto error_free_data; |
4a744367 JD |
870 | } |
871 | assert(ret_len == len); | |
af701dc4 | 872 | metadata_stream->metadata_len += len; |
8ace20bf | 873 | free(data); |
9abca178 | 874 | ret = len; |
8ace20bf MD |
875 | end: |
876 | return ret; | |
4a744367 | 877 | |
8ace20bf | 878 | error_free_data: |
4a744367 | 879 | free(data); |
4a744367 | 880 | error: |
8ace20bf | 881 | return -1; |
4a744367 JD |
882 | } |
883 | ||
9abca178 JD |
884 | /* |
885 | * Return 0 on success, a negative value on error. | |
886 | */ | |
887 | static | |
888 | int get_new_metadata(struct lttng_live_ctx *ctx, | |
af701dc4 JD |
889 | struct lttng_live_viewer_stream *viewer_stream, |
890 | char **metadata_buf) | |
9abca178 JD |
891 | { |
892 | int ret = 0; | |
893 | struct lttng_live_viewer_stream *metadata_stream; | |
43273943 | 894 | size_t size, len_read = 0; |
9abca178 JD |
895 | |
896 | metadata_stream = viewer_stream->ctf_trace->metadata_stream; | |
50d207af JD |
897 | if (!metadata_stream) { |
898 | fprintf(stderr, "[error] No metadata stream\n"); | |
899 | ret = -1; | |
900 | goto error; | |
901 | } | |
af701dc4 JD |
902 | metadata_stream->metadata_len = 0; |
903 | ret = open_metadata_fp_write(metadata_stream, metadata_buf, &size); | |
904 | if (ret < 0) { | |
905 | goto error; | |
906 | } | |
9abca178 JD |
907 | |
908 | do { | |
96aa3f9c JD |
909 | if (lttng_live_should_quit()) { |
910 | ret = -1; | |
911 | goto error; | |
912 | } | |
9abca178 JD |
913 | /* |
914 | * get_one_metadata_packet returns the number of bytes | |
915 | * received, 0 when we have received everything, a | |
916 | * negative value on error. | |
917 | */ | |
918 | ret = get_one_metadata_packet(ctx, metadata_stream); | |
c111d5d7 MD |
919 | if (ret > 0) { |
920 | len_read += ret; | |
921 | } | |
85e2085e MD |
922 | if (!len_read) { |
923 | (void) poll(NULL, 0, ACTIVE_POLL_DELAY); | |
924 | } | |
c111d5d7 | 925 | } while (ret > 0 || !len_read); |
9abca178 | 926 | |
0cbbc8b8 | 927 | if (bt_close_memstream(metadata_buf, &size, |
df65cfc1 | 928 | metadata_stream->metadata_fp_write)) { |
0cbbc8b8 | 929 | perror("bt_close_memstream"); |
df65cfc1 | 930 | } |
af701dc4 JD |
931 | metadata_stream->metadata_fp_write = NULL; |
932 | ||
933 | error: | |
9abca178 JD |
934 | return ret; |
935 | } | |
936 | ||
5805251d JD |
937 | /* |
938 | * Assign the fields from a lttng_viewer_index to a packet_index. | |
939 | */ | |
940 | static | |
941 | void lttng_index_to_packet_index(struct lttng_viewer_index *lindex, | |
942 | struct packet_index *pindex) | |
943 | { | |
944 | assert(lindex); | |
945 | assert(pindex); | |
946 | ||
947 | pindex->offset = be64toh(lindex->offset); | |
948 | pindex->packet_size = be64toh(lindex->packet_size); | |
949 | pindex->content_size = be64toh(lindex->content_size); | |
950 | pindex->ts_cycles.timestamp_begin = be64toh(lindex->timestamp_begin); | |
951 | pindex->ts_cycles.timestamp_end = be64toh(lindex->timestamp_end); | |
952 | pindex->events_discarded = be64toh(lindex->events_discarded); | |
953 | } | |
954 | ||
4a744367 JD |
955 | /* |
956 | * Get one index for a stream. | |
957 | * | |
958 | * Returns 0 on success or a negative value on error. | |
959 | */ | |
960 | static | |
961 | int get_next_index(struct lttng_live_ctx *ctx, | |
962 | struct lttng_live_viewer_stream *viewer_stream, | |
5805251d | 963 | struct packet_index *index, uint64_t *stream_id) |
4a744367 JD |
964 | { |
965 | struct lttng_viewer_cmd cmd; | |
966 | struct lttng_viewer_get_next_index rq; | |
4a744367 | 967 | int ret; |
4a744367 | 968 | ssize_t ret_len; |
5805251d | 969 | struct lttng_viewer_index *rp = &viewer_stream->current_index; |
4a744367 JD |
970 | |
971 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_NEXT_INDEX); | |
86c86ab8 | 972 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); |
d8fefb9b | 973 | cmd.cmd_version = htobe32(0); |
4a744367 JD |
974 | |
975 | memset(&rq, 0, sizeof(rq)); | |
976 | rq.stream_id = htobe64(viewer_stream->id); | |
977 | ||
978 | retry: | |
8ace20bf MD |
979 | if (lttng_live_should_quit()) { |
980 | ret = -1; | |
981 | goto end; | |
982 | } | |
b7e8a8e1 | 983 | ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd)); |
4a744367 | 984 | if (ret_len < 0) { |
79620497 | 985 | perror("[error] Error sending cmd"); |
4a744367 JD |
986 | goto error; |
987 | } | |
988 | assert(ret_len == sizeof(cmd)); | |
989 | ||
b7e8a8e1 | 990 | ret_len = lttng_live_send(ctx->control_sock, &rq, sizeof(rq)); |
4a744367 | 991 | if (ret_len < 0) { |
79620497 | 992 | perror("[error] Error sending get_next_index request"); |
4a744367 JD |
993 | goto error; |
994 | } | |
995 | assert(ret_len == sizeof(rq)); | |
996 | ||
5805251d | 997 | ret_len = lttng_live_recv(ctx->control_sock, rp, sizeof(*rp)); |
f8612f31 MD |
998 | if (ret_len == 0) { |
999 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
1000 | goto error; |
1001 | } | |
4a744367 | 1002 | if (ret_len < 0) { |
79620497 | 1003 | perror("[error] Error receiving index response"); |
4a744367 JD |
1004 | goto error; |
1005 | } | |
5805251d | 1006 | assert(ret_len == sizeof(*rp)); |
4a744367 | 1007 | |
5805251d | 1008 | rp->flags = be32toh(rp->flags); |
4a744367 | 1009 | |
5805251d | 1010 | switch (be32toh(rp->status)) { |
4a744367 JD |
1011 | case LTTNG_VIEWER_INDEX_INACTIVE: |
1012 | printf_verbose("get_next_index: inactive\n"); | |
1013 | memset(index, 0, sizeof(struct packet_index)); | |
5805251d JD |
1014 | index->ts_cycles.timestamp_end = be64toh(rp->timestamp_end); |
1015 | *stream_id = be64toh(rp->stream_id); | |
4a744367 JD |
1016 | break; |
1017 | case LTTNG_VIEWER_INDEX_OK: | |
1018 | printf_verbose("get_next_index: Ok, need metadata update : %u\n", | |
5805251d JD |
1019 | rp->flags & LTTNG_VIEWER_FLAG_NEW_METADATA); |
1020 | lttng_index_to_packet_index(rp, index); | |
1021 | *stream_id = be64toh(rp->stream_id); | |
1022 | viewer_stream->data_pending = 1; | |
4a744367 | 1023 | |
5805251d | 1024 | if (rp->flags & LTTNG_VIEWER_FLAG_NEW_METADATA) { |
50d207af JD |
1025 | ret = append_metadata(ctx, viewer_stream); |
1026 | if (ret) | |
4a744367 | 1027 | goto error; |
4a744367 | 1028 | } |
5805251d | 1029 | if (rp->flags & LTTNG_VIEWER_FLAG_NEW_STREAM) { |
43273943 | 1030 | printf_verbose("get_next_index: need new streams\n"); |
2acdc547 | 1031 | ret = ask_new_streams(ctx); |
bf6c9bd6 | 1032 | if (ret < 0) { |
2acdc547 | 1033 | goto error; |
bf6c9bd6 JD |
1034 | } else if (ret > 0) { |
1035 | ret = add_traces(ctx); | |
1036 | if (ret < 0) { | |
1037 | goto error; | |
1038 | } | |
1039 | } | |
2acdc547 | 1040 | } |
4a744367 JD |
1041 | break; |
1042 | case LTTNG_VIEWER_INDEX_RETRY: | |
1043 | printf_verbose("get_next_index: retry\n"); | |
85e2085e | 1044 | (void) poll(NULL, 0, ACTIVE_POLL_DELAY); |
4a744367 JD |
1045 | goto retry; |
1046 | case LTTNG_VIEWER_INDEX_HUP: | |
1047 | printf_verbose("get_next_index: stream hung up\n"); | |
1048 | viewer_stream->id = -1ULL; | |
4a744367 | 1049 | index->offset = EOF; |
2acdc547 | 1050 | ctx->session->stream_count--; |
4a744367 JD |
1051 | break; |
1052 | case LTTNG_VIEWER_INDEX_ERR: | |
1053 | fprintf(stderr, "[error] get_next_index: error\n"); | |
4a744367 JD |
1054 | goto error; |
1055 | default: | |
1056 | fprintf(stderr, "[error] get_next_index: unkwown value\n"); | |
4a744367 JD |
1057 | goto error; |
1058 | } | |
4a744367 | 1059 | ret = 0; |
8ace20bf MD |
1060 | end: |
1061 | return ret; | |
4a744367 JD |
1062 | |
1063 | error: | |
8ace20bf | 1064 | return -1; |
4a744367 JD |
1065 | } |
1066 | ||
5805251d JD |
1067 | static |
1068 | void read_packet_header(struct ctf_stream_pos *pos, | |
1069 | struct ctf_file_stream *file_stream) | |
1070 | { | |
1071 | int ret; | |
1072 | ||
1073 | /* update trace_packet_header and stream_packet_context */ | |
c88c09f9 JG |
1074 | if (!(pos->prot & PROT_WRITE) && |
1075 | file_stream->parent.trace_packet_header) { | |
5805251d JD |
1076 | /* Read packet header */ |
1077 | ret = generic_rw(&pos->parent, | |
1078 | &file_stream->parent.trace_packet_header->p); | |
1079 | if (ret) { | |
1080 | pos->offset = EOF; | |
1081 | fprintf(stderr, "[error] trace packet " | |
1082 | "header read failed\n"); | |
1083 | goto end; | |
1084 | } | |
1085 | } | |
c88c09f9 JG |
1086 | if (!(pos->prot & PROT_WRITE) && |
1087 | file_stream->parent.stream_packet_context) { | |
5805251d JD |
1088 | /* Read packet context */ |
1089 | ret = generic_rw(&pos->parent, | |
1090 | &file_stream->parent.stream_packet_context->p); | |
1091 | if (ret) { | |
1092 | pos->offset = EOF; | |
1093 | fprintf(stderr, "[error] stream packet " | |
1094 | "context read failed\n"); | |
1095 | goto end; | |
1096 | } | |
1097 | } | |
1098 | pos->data_offset = pos->offset; | |
1099 | ||
1100 | end: | |
1101 | return; | |
1102 | } | |
1103 | ||
1104 | /* | |
1105 | * Handle the seek parameters. | |
1106 | * Returns 0 if the packet_seek can continue, a positive value to | |
1107 | * cleanly exit the packet_seek, a negative value on error. | |
1108 | */ | |
1109 | static | |
1110 | int handle_seek_position(size_t index, int whence, | |
1111 | struct lttng_live_viewer_stream *viewer_stream, | |
1112 | struct ctf_stream_pos *pos, | |
1113 | struct ctf_file_stream *file_stream) | |
1114 | { | |
0530d28f | 1115 | int ret = 0; |
5805251d JD |
1116 | |
1117 | switch (whence) { | |
1118 | case SEEK_CUR: | |
1119 | ret = 0; | |
1120 | goto end; | |
1121 | case SEEK_SET: | |
1122 | /* | |
1123 | * We only allow to seek to 0. | |
1124 | */ | |
1125 | if (index != 0) { | |
1126 | fprintf(stderr, "[error] Arbitrary seek in lttng-live " | |
1127 | "trace not supported\n"); | |
1128 | pos->offset = EOF; | |
1129 | ret = -1; | |
1130 | goto end; | |
1131 | } | |
1132 | ||
1133 | ret = 0; | |
1134 | goto end; | |
1135 | ||
1136 | default: | |
1137 | fprintf(stderr, "[error] Invalid seek parameter\n"); | |
1138 | assert(0); | |
1139 | } | |
1140 | ||
1141 | end: | |
1142 | return ret; | |
1143 | } | |
1144 | ||
b5a1fa45 | 1145 | static |
4a744367 JD |
1146 | void ctf_live_packet_seek(struct bt_stream_pos *stream_pos, size_t index, |
1147 | int whence) | |
1148 | { | |
1149 | struct ctf_stream_pos *pos; | |
1150 | struct ctf_file_stream *file_stream; | |
f1f52630 | 1151 | struct packet_index *prev_index = NULL, *cur_index; |
4a744367 JD |
1152 | struct lttng_live_viewer_stream *viewer_stream; |
1153 | struct lttng_live_session *session; | |
5805251d | 1154 | uint64_t stream_id = -1ULL; |
4a744367 JD |
1155 | int ret; |
1156 | ||
4a744367 JD |
1157 | pos = ctf_pos(stream_pos); |
1158 | file_stream = container_of(pos, struct ctf_file_stream, pos); | |
1159 | viewer_stream = (struct lttng_live_viewer_stream *) pos->priv; | |
1160 | session = viewer_stream->session; | |
1161 | ||
5805251d JD |
1162 | ret = handle_seek_position(index, whence, viewer_stream, pos, |
1163 | file_stream); | |
1164 | if (ret != 0) { | |
1165 | return; | |
1166 | } | |
1167 | ||
1168 | retry: | |
f1f52630 MD |
1169 | switch (pos->packet_index->len) { |
1170 | case 0: | |
1171 | g_array_set_size(pos->packet_index, 1); | |
1172 | cur_index = &g_array_index(pos->packet_index, | |
1173 | struct packet_index, 0); | |
1174 | break; | |
1175 | case 1: | |
1176 | g_array_set_size(pos->packet_index, 2); | |
1177 | prev_index = &g_array_index(pos->packet_index, | |
1178 | struct packet_index, 0); | |
1179 | cur_index = &g_array_index(pos->packet_index, | |
1180 | struct packet_index, 1); | |
1181 | break; | |
1182 | case 2: | |
1183 | g_array_index(pos->packet_index, | |
1184 | struct packet_index, 0) = | |
1185 | g_array_index(pos->packet_index, | |
1186 | struct packet_index, 1); | |
1187 | prev_index = &g_array_index(pos->packet_index, | |
1188 | struct packet_index, 0); | |
1189 | cur_index = &g_array_index(pos->packet_index, | |
1190 | struct packet_index, 1); | |
1191 | break; | |
1192 | default: | |
1193 | abort(); | |
1194 | break; | |
1195 | } | |
5805251d JD |
1196 | |
1197 | if (viewer_stream->data_pending) { | |
1198 | lttng_index_to_packet_index(&viewer_stream->current_index, cur_index); | |
1199 | } else { | |
1200 | printf_verbose("get_next_index for stream %" PRIu64 "\n", viewer_stream->id); | |
1201 | ret = get_next_index(session->ctx, viewer_stream, cur_index, &stream_id); | |
1202 | if (ret < 0) { | |
1203 | pos->offset = EOF; | |
1204 | if (!lttng_live_should_quit()) { | |
1205 | fprintf(stderr, "[error] get_next_index failed\n"); | |
1206 | } | |
1207 | return; | |
f28fb4b6 | 1208 | } |
5805251d JD |
1209 | printf_verbose("Index received : packet_size : %" PRIu64 |
1210 | ", offset %" PRIu64 ", content_size %" PRIu64 | |
1211 | ", timestamp_end : %" PRIu64 "\n", | |
1212 | cur_index->packet_size, cur_index->offset, | |
1213 | cur_index->content_size, | |
1214 | cur_index->ts_cycles.timestamp_end); | |
1215 | ||
1216 | } | |
1217 | ||
1218 | /* | |
1219 | * On the first time we receive an index, the stream_id needs to | |
1220 | * be set for the stream in order to use it, we don't want any | |
1221 | * data at this stage. | |
1222 | */ | |
1223 | if (file_stream->parent.stream_id == -1ULL) { | |
1224 | /* | |
1225 | * Warning: with lttng-tools < 2.4.2, the beacon does not | |
1226 | * contain the real stream ID, it is memset to 0, so this | |
1227 | * might create a problem when a session has multiple | |
1228 | * channels. We can't detect it at this stage, lttng-tools | |
1229 | * has to be upgraded to fix this problem. | |
1230 | */ | |
1231 | printf_verbose("Assigning stream_id %" PRIu64 "\n", | |
1232 | stream_id); | |
1233 | file_stream->parent.stream_id = stream_id; | |
1234 | viewer_stream->ctf_stream_id = stream_id; | |
1235 | ||
4a744367 JD |
1236 | return; |
1237 | } | |
1238 | ||
f1f52630 MD |
1239 | pos->packet_size = cur_index->packet_size; |
1240 | pos->content_size = cur_index->content_size; | |
4a744367 | 1241 | pos->mmap_base_offset = 0; |
f1f52630 | 1242 | if (cur_index->offset == EOF) { |
4a744367 JD |
1243 | pos->offset = EOF; |
1244 | } else { | |
1245 | pos->offset = 0; | |
1246 | } | |
1247 | ||
f1f52630 | 1248 | if (cur_index->content_size == 0) { |
5805251d JD |
1249 | if (file_stream->parent.stream_class) { |
1250 | file_stream->parent.cycles_timestamp = | |
f1f52630 | 1251 | cur_index->ts_cycles.timestamp_end; |
5805251d JD |
1252 | file_stream->parent.real_timestamp = ctf_get_real_timestamp( |
1253 | &file_stream->parent, | |
1254 | cur_index->ts_cycles.timestamp_end); | |
1255 | } | |
4a744367 | 1256 | } else { |
5805251d JD |
1257 | if (file_stream->parent.stream_class) { |
1258 | /* Convert the timestamps and append to the real_index. */ | |
1259 | cur_index->ts_real.timestamp_begin = ctf_get_real_timestamp( | |
1260 | &file_stream->parent, | |
1261 | cur_index->ts_cycles.timestamp_begin); | |
1262 | cur_index->ts_real.timestamp_end = ctf_get_real_timestamp( | |
1263 | &file_stream->parent, | |
1264 | cur_index->ts_cycles.timestamp_end); | |
1265 | } | |
f1f52630 MD |
1266 | |
1267 | ctf_update_current_packet_index(&file_stream->parent, | |
1268 | prev_index, cur_index); | |
1269 | ||
1270 | file_stream->parent.cycles_timestamp = | |
1271 | cur_index->ts_cycles.timestamp_begin; | |
1272 | file_stream->parent.real_timestamp = | |
1273 | cur_index->ts_real.timestamp_begin; | |
4a744367 JD |
1274 | } |
1275 | ||
76206d81 JG |
1276 | /* |
1277 | * Flush the output between attempts to grab a packet, thus | |
1278 | * ensuring we flush at least at the periodical timer period. | |
1279 | * This ensures the output remains reactive for interactive users and | |
1280 | * that the output is flushed when redirected to a file by the shell. | |
1281 | */ | |
1282 | if (fflush(LTTNG_LIVE_OUTPUT_FP) < 0) { | |
1283 | perror("fflush"); | |
1284 | goto end; | |
1285 | } | |
1286 | ||
4a744367 JD |
1287 | if (pos->packet_size == 0 || pos->offset == EOF) { |
1288 | goto end; | |
1289 | } | |
1290 | ||
1291 | printf_verbose("get_data_packet for stream %" PRIu64 "\n", | |
1292 | viewer_stream->id); | |
1293 | ret = get_data_packet(session->ctx, pos, viewer_stream, | |
c1e8ac81 | 1294 | cur_index->offset, |
f1f52630 | 1295 | cur_index->packet_size / CHAR_BIT); |
4a744367 JD |
1296 | if (ret == -2) { |
1297 | goto retry; | |
1298 | } else if (ret < 0) { | |
1299 | pos->offset = EOF; | |
f28fb4b6 JG |
1300 | if (!lttng_live_should_quit()) { |
1301 | fprintf(stderr, "[error] get_data_packet failed\n"); | |
1302 | } | |
4a744367 JD |
1303 | return; |
1304 | } | |
5805251d | 1305 | viewer_stream->data_pending = 0; |
4a744367 | 1306 | |
5805251d | 1307 | read_packet_header(pos, file_stream); |
4a744367 JD |
1308 | |
1309 | end: | |
1310 | return; | |
1311 | } | |
1312 | ||
2acdc547 JD |
1313 | int lttng_live_create_viewer_session(struct lttng_live_ctx *ctx) |
1314 | { | |
1315 | struct lttng_viewer_cmd cmd; | |
1316 | struct lttng_viewer_create_session_response resp; | |
1317 | int ret; | |
1318 | ssize_t ret_len; | |
1319 | ||
8ace20bf MD |
1320 | if (lttng_live_should_quit()) { |
1321 | ret = -1; | |
1322 | goto end; | |
1323 | } | |
1324 | ||
2acdc547 | 1325 | cmd.cmd = htobe32(LTTNG_VIEWER_CREATE_SESSION); |
86c86ab8 | 1326 | cmd.data_size = htobe64((uint64_t) 0); |
d8fefb9b | 1327 | cmd.cmd_version = htobe32(0); |
2acdc547 | 1328 | |
b7e8a8e1 | 1329 | ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd)); |
2acdc547 | 1330 | if (ret_len < 0) { |
79620497 | 1331 | perror("[error] Error sending cmd"); |
2acdc547 JD |
1332 | goto error; |
1333 | } | |
1334 | assert(ret_len == sizeof(cmd)); | |
1335 | ||
b7e8a8e1 | 1336 | ret_len = lttng_live_recv(ctx->control_sock, &resp, sizeof(resp)); |
f8612f31 MD |
1337 | if (ret_len == 0) { |
1338 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
1339 | goto error; |
1340 | } | |
2acdc547 | 1341 | if (ret_len < 0) { |
79620497 | 1342 | perror("[error] Error receiving create session reply"); |
2acdc547 JD |
1343 | goto error; |
1344 | } | |
1345 | assert(ret_len == sizeof(resp)); | |
1346 | ||
1347 | if (be32toh(resp.status) != LTTNG_VIEWER_CREATE_SESSION_OK) { | |
1348 | fprintf(stderr, "[error] Error creating viewer session\n"); | |
2acdc547 JD |
1349 | goto error; |
1350 | } | |
1351 | ret = 0; | |
8ace20bf MD |
1352 | end: |
1353 | return ret; | |
2acdc547 JD |
1354 | |
1355 | error: | |
8ace20bf | 1356 | return -1; |
2acdc547 JD |
1357 | } |
1358 | ||
1359 | static | |
1360 | int del_traces(gpointer key, gpointer value, gpointer user_data) | |
4a744367 JD |
1361 | { |
1362 | struct bt_context *bt_ctx = user_data; | |
1363 | struct lttng_live_ctf_trace *trace = value; | |
1364 | int ret; | |
1365 | ||
1366 | ret = bt_context_remove_trace(bt_ctx, trace->trace_id); | |
1367 | if (ret < 0) | |
1368 | fprintf(stderr, "[error] removing trace from context\n"); | |
1369 | ||
1370 | /* remove the key/value pair from the HT. */ | |
1371 | return 1; | |
1372 | } | |
1373 | ||
2acdc547 | 1374 | static |
bf6c9bd6 JD |
1375 | int add_one_trace(struct lttng_live_ctx *ctx, |
1376 | struct lttng_live_ctf_trace *trace) | |
4a744367 | 1377 | { |
9abca178 | 1378 | int i, ret; |
bf6c9bd6 | 1379 | struct bt_context *bt_ctx = ctx->bt_ctx; |
4a744367 JD |
1380 | struct lttng_live_viewer_stream *stream; |
1381 | struct bt_mmap_stream *new_mmap_stream; | |
1382 | struct bt_mmap_stream_list mmap_list; | |
150595c4 JD |
1383 | struct bt_trace_descriptor *td; |
1384 | struct bt_trace_handle *handle; | |
4a744367 | 1385 | |
b5a1fa45 JD |
1386 | /* |
1387 | * We don't know how many streams we will receive for a trace, so | |
1388 | * once we are done receiving the traces, we add all the traces | |
1389 | * received to the bt_context. | |
1390 | * We can receive streams during the attach command or the | |
1391 | * get_new_streams, so we have to make sure not to add multiple | |
1392 | * times the same traces. | |
1393 | * If a trace is already in the context, we just skip this function. | |
1394 | */ | |
bf6c9bd6 JD |
1395 | if (trace->in_use) { |
1396 | ret = 0; | |
1397 | goto end; | |
1398 | } | |
2acdc547 | 1399 | |
4a744367 JD |
1400 | BT_INIT_LIST_HEAD(&mmap_list.head); |
1401 | ||
1402 | for (i = 0; i < trace->streams->len; i++) { | |
1403 | stream = g_ptr_array_index(trace->streams, i); | |
4a744367 JD |
1404 | |
1405 | if (!stream->metadata_flag) { | |
1406 | new_mmap_stream = zmalloc(sizeof(struct bt_mmap_stream)); | |
1407 | new_mmap_stream->priv = (void *) stream; | |
1408 | new_mmap_stream->fd = -1; | |
1409 | bt_list_add(&new_mmap_stream->list, &mmap_list.head); | |
1410 | } else { | |
af701dc4 JD |
1411 | char *metadata_buf = NULL; |
1412 | ||
4a744367 | 1413 | /* Get all possible metadata before starting */ |
af701dc4 JD |
1414 | ret = get_new_metadata(ctx, stream, &metadata_buf); |
1415 | if (ret) { | |
1416 | free(metadata_buf); | |
1417 | goto end_free; | |
1418 | } | |
1419 | if (!stream->metadata_len) { | |
1420 | fprintf(stderr, "[error] empty metadata\n"); | |
1421 | ret = -1; | |
1422 | free(metadata_buf); | |
1423 | goto end_free; | |
1424 | } | |
1425 | ||
0cbbc8b8 | 1426 | trace->metadata_fp = bt_fmemopen(metadata_buf, |
af701dc4 JD |
1427 | stream->metadata_len, "rb"); |
1428 | if (!trace->metadata_fp) { | |
1429 | perror("Metadata fmemopen"); | |
1430 | ret = -1; | |
1431 | free(metadata_buf); | |
9abca178 | 1432 | goto end_free; |
af701dc4 | 1433 | } |
4a744367 JD |
1434 | } |
1435 | } | |
1436 | ||
1437 | if (!trace->metadata_fp) { | |
1438 | fprintf(stderr, "[error] No metadata stream opened\n"); | |
bf6c9bd6 | 1439 | ret = -1; |
4a744367 JD |
1440 | goto end_free; |
1441 | } | |
1442 | ||
1443 | ret = bt_context_add_trace(bt_ctx, NULL, "ctf", | |
1444 | ctf_live_packet_seek, &mmap_list, trace->metadata_fp); | |
1445 | if (ret < 0) { | |
1446 | fprintf(stderr, "[error] Error adding trace\n"); | |
bf6c9bd6 | 1447 | ret = -1; |
4a744367 JD |
1448 | goto end_free; |
1449 | } | |
af701dc4 JD |
1450 | trace->metadata_stream->metadata_len = 0; |
1451 | ||
150595c4 JD |
1452 | handle = (struct bt_trace_handle *) g_hash_table_lookup( |
1453 | bt_ctx->trace_handles, | |
1454 | (gpointer) (unsigned long) ret); | |
1455 | td = handle->td; | |
1456 | trace->handle = handle; | |
2acdc547 | 1457 | if (bt_ctx->current_iterator) { |
2acdc547 JD |
1458 | bt_iter_add_trace(bt_ctx->current_iterator, td); |
1459 | } | |
1460 | ||
4a744367 | 1461 | trace->trace_id = ret; |
2acdc547 | 1462 | trace->in_use = 1; |
4a744367 JD |
1463 | |
1464 | goto end; | |
1465 | ||
1466 | end_free: | |
1467 | bt_context_put(bt_ctx); | |
1468 | end: | |
bf6c9bd6 JD |
1469 | return ret; |
1470 | } | |
1471 | ||
1472 | static | |
1473 | int add_traces(struct lttng_live_ctx *ctx) | |
1474 | { | |
1475 | int ret; | |
1476 | struct lttng_live_ctf_trace *trace; | |
1477 | GHashTableIter it; | |
1478 | gpointer key; | |
1479 | gpointer value; | |
1480 | ||
1481 | g_hash_table_iter_init(&it, ctx->session->ctf_traces); | |
1482 | while (g_hash_table_iter_next(&it, &key, &value)) { | |
1483 | trace = (struct lttng_live_ctf_trace *) value; | |
1484 | ret = add_one_trace(ctx, trace); | |
1485 | if (ret < 0) { | |
1486 | goto end; | |
1487 | } | |
1488 | } | |
1489 | ||
1490 | ret = 0; | |
1491 | ||
1492 | end: | |
1493 | return ret; | |
4a744367 JD |
1494 | } |
1495 | ||
43273943 JD |
1496 | /* |
1497 | * Request new streams for a session. | |
1498 | * Returns the number of streams received or a negative value on error. | |
1499 | */ | |
2acdc547 | 1500 | int lttng_live_get_new_streams(struct lttng_live_ctx *ctx, uint64_t id) |
6192b988 JD |
1501 | { |
1502 | struct lttng_viewer_cmd cmd; | |
2acdc547 JD |
1503 | struct lttng_viewer_new_streams_request rq; |
1504 | struct lttng_viewer_new_streams_response rp; | |
1505 | struct lttng_viewer_stream stream; | |
43273943 | 1506 | int ret, i, nb_streams = 0; |
6192b988 | 1507 | ssize_t ret_len; |
b5a1fa45 | 1508 | uint32_t stream_count; |
6192b988 | 1509 | |
8ace20bf MD |
1510 | if (lttng_live_should_quit()) { |
1511 | ret = -1; | |
1512 | goto end; | |
1513 | } | |
1514 | ||
2acdc547 | 1515 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_NEW_STREAMS); |
86c86ab8 | 1516 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); |
d8fefb9b | 1517 | cmd.cmd_version = htobe32(0); |
6192b988 | 1518 | |
2acdc547 JD |
1519 | memset(&rq, 0, sizeof(rq)); |
1520 | rq.session_id = htobe64(id); | |
1521 | ||
b7e8a8e1 | 1522 | ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd)); |
6192b988 | 1523 | if (ret_len < 0) { |
79620497 | 1524 | perror("[error] Error sending cmd"); |
6192b988 JD |
1525 | goto error; |
1526 | } | |
1527 | assert(ret_len == sizeof(cmd)); | |
1528 | ||
b7e8a8e1 | 1529 | ret_len = lttng_live_send(ctx->control_sock, &rq, sizeof(rq)); |
6192b988 | 1530 | if (ret_len < 0) { |
79620497 | 1531 | perror("[error] Error sending get_new_streams request"); |
6192b988 JD |
1532 | goto error; |
1533 | } | |
2acdc547 | 1534 | assert(ret_len == sizeof(rq)); |
6192b988 | 1535 | |
b7e8a8e1 | 1536 | ret_len = lttng_live_recv(ctx->control_sock, &rp, sizeof(rp)); |
f8612f31 MD |
1537 | if (ret_len == 0) { |
1538 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
1539 | goto error; |
1540 | } | |
2acdc547 | 1541 | if (ret_len < 0) { |
79620497 | 1542 | perror("[error] Error receiving get_new_streams response"); |
6192b988 JD |
1543 | goto error; |
1544 | } | |
2acdc547 JD |
1545 | assert(ret_len == sizeof(rp)); |
1546 | ||
1547 | switch(be32toh(rp.status)) { | |
1548 | case LTTNG_VIEWER_NEW_STREAMS_OK: | |
1549 | break; | |
1550 | case LTTNG_VIEWER_NEW_STREAMS_NO_NEW: | |
1551 | ret = 0; | |
1552 | goto end; | |
1553 | case LTTNG_VIEWER_NEW_STREAMS_HUP: | |
1554 | ret = -LTTNG_VIEWER_NEW_STREAMS_HUP; | |
1555 | goto end; | |
1556 | case LTTNG_VIEWER_NEW_STREAMS_ERR: | |
1557 | fprintf(stderr, "[error] get_new_streams error\n"); | |
8ace20bf | 1558 | goto error; |
2acdc547 JD |
1559 | default: |
1560 | fprintf(stderr, "[error] Unknown return code %u\n", | |
1561 | be32toh(rp.status)); | |
8ace20bf | 1562 | goto error; |
2acdc547 JD |
1563 | } |
1564 | ||
b5a1fa45 JD |
1565 | stream_count = be32toh(rp.streams_count); |
1566 | ctx->session->stream_count += stream_count; | |
2acdc547 JD |
1567 | /* |
1568 | * When the session is created but not started, we do an active wait | |
1569 | * until it starts. It allows the viewer to start processing the trace | |
1570 | * as soon as the session starts. | |
1571 | */ | |
1572 | if (ctx->session->stream_count == 0) { | |
1573 | ret = 0; | |
1574 | goto end; | |
1575 | } | |
1576 | printf_verbose("Waiting for %" PRIu64 " streams:\n", | |
1577 | ctx->session->stream_count); | |
1578 | ctx->session->streams = g_new0(struct lttng_live_viewer_stream, | |
1579 | ctx->session->stream_count); | |
b5a1fa45 | 1580 | for (i = 0; i < stream_count; i++) { |
b7e8a8e1 | 1581 | ret_len = lttng_live_recv(ctx->control_sock, &stream, sizeof(stream)); |
f8612f31 MD |
1582 | if (ret_len == 0) { |
1583 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
1584 | goto error; |
1585 | } | |
2acdc547 | 1586 | if (ret_len < 0) { |
79620497 | 1587 | perror("[error] Error receiving stream"); |
2acdc547 JD |
1588 | goto error; |
1589 | } | |
1590 | assert(ret_len == sizeof(stream)); | |
1591 | stream.path_name[LTTNG_VIEWER_PATH_MAX - 1] = '\0'; | |
1592 | stream.channel_name[LTTNG_VIEWER_NAME_MAX - 1] = '\0'; | |
1593 | ||
1594 | printf_verbose(" stream %" PRIu64 " : %s/%s\n", | |
1595 | be64toh(stream.id), stream.path_name, | |
1596 | stream.channel_name); | |
1597 | ctx->session->streams[i].id = be64toh(stream.id); | |
1598 | ctx->session->streams[i].session = ctx->session; | |
1599 | ||
2acdc547 | 1600 | ctx->session->streams[i].mmap_size = 0; |
5805251d | 1601 | ctx->session->streams[i].ctf_stream_id = -1ULL; |
2acdc547 JD |
1602 | |
1603 | if (be32toh(stream.metadata_flag)) { | |
2acdc547 | 1604 | ctx->session->streams[i].metadata_flag = 1; |
2acdc547 JD |
1605 | } |
1606 | ret = lttng_live_ctf_trace_assign(&ctx->session->streams[i], | |
1607 | be64toh(stream.ctf_trace_id)); | |
1608 | if (ret < 0) { | |
1609 | goto error; | |
1610 | } | |
43273943 | 1611 | nb_streams++; |
2acdc547 JD |
1612 | |
1613 | } | |
43273943 | 1614 | ret = nb_streams; |
2acdc547 | 1615 | end: |
6192b988 | 1616 | return ret; |
8ace20bf MD |
1617 | |
1618 | error: | |
1619 | return -1; | |
6192b988 JD |
1620 | } |
1621 | ||
23285bf3 | 1622 | int lttng_live_read(struct lttng_live_ctx *ctx) |
4a744367 | 1623 | { |
23285bf3 JG |
1624 | int ret = -1; |
1625 | int i; | |
4a744367 JD |
1626 | struct bt_ctf_iter *iter; |
1627 | const struct bt_ctf_event *event; | |
1628 | struct bt_iter_pos begin_pos; | |
1629 | struct bt_trace_descriptor *td_write; | |
1630 | struct bt_format *fmt_write; | |
1631 | struct ctf_text_stream_pos *sout; | |
2acdc547 | 1632 | uint64_t id; |
4a744367 | 1633 | |
2acdc547 JD |
1634 | ctx->bt_ctx = bt_context_create(); |
1635 | if (!ctx->bt_ctx) { | |
4a744367 JD |
1636 | fprintf(stderr, "[error] bt_context_create allocation\n"); |
1637 | goto end; | |
1638 | } | |
1639 | ||
2ea5cc8b | 1640 | fmt_write = bt_lookup_format(g_quark_from_string("text")); |
4a744367 JD |
1641 | if (!fmt_write) { |
1642 | fprintf(stderr, "[error] ctf-text error\n"); | |
1643 | goto end; | |
1644 | } | |
1645 | ||
1646 | td_write = fmt_write->open_trace(NULL, O_RDWR, NULL, NULL); | |
1647 | if (!td_write) { | |
1648 | fprintf(stderr, "[error] Error opening output trace\n"); | |
1649 | goto end_free; | |
1650 | } | |
1651 | ||
1652 | sout = container_of(td_write, struct ctf_text_stream_pos, | |
1653 | trace_descriptor); | |
85bb4663 | 1654 | if (!sout->parent.event_cb) { |
4a744367 | 1655 | goto end_free; |
85bb4663 | 1656 | } |
4a744367 | 1657 | |
6192b988 JD |
1658 | ret = lttng_live_create_viewer_session(ctx); |
1659 | if (ret < 0) { | |
1660 | goto end_free; | |
1661 | } | |
1662 | ||
2acdc547 JD |
1663 | for (i = 0; i < ctx->session_ids->len; i++) { |
1664 | id = g_array_index(ctx->session_ids, uint64_t, i); | |
7c72a3fb | 1665 | printf_verbose("Attaching to session %" PRIu64 "\n", id); |
2acdc547 JD |
1666 | ret = lttng_live_attach_session(ctx, id); |
1667 | printf_verbose("Attaching session returns %d\n", ret); | |
1668 | if (ret < 0) { | |
1669 | if (ret == -LTTNG_VIEWER_ATTACH_UNK) { | |
1670 | fprintf(stderr, "[error] Unknown session ID\n"); | |
1671 | } | |
1672 | goto end_free; | |
1673 | } | |
1674 | } | |
1675 | ||
4a744367 | 1676 | /* |
2acdc547 | 1677 | * As long as the session is active, we try to get new streams. |
4a744367 | 1678 | */ |
2acdc547 | 1679 | for (;;) { |
4a744367 JD |
1680 | int flags; |
1681 | ||
8ace20bf | 1682 | if (lttng_live_should_quit()) { |
23285bf3 | 1683 | ret = 0; |
8ace20bf MD |
1684 | goto end_free; |
1685 | } | |
1686 | ||
2acdc547 | 1687 | while (!ctx->session->stream_count) { |
8ace20bf MD |
1688 | if (lttng_live_should_quit() |
1689 | || ctx->session_ids->len == 0) { | |
23285bf3 | 1690 | ret = 0; |
4a744367 | 1691 | goto end_free; |
85bb4663 | 1692 | } |
2acdc547 | 1693 | ret = ask_new_streams(ctx); |
85bb4663 | 1694 | if (ret < 0) { |
2acdc547 | 1695 | goto end_free; |
85bb4663 MD |
1696 | } |
1697 | if (!ctx->session->stream_count) { | |
85e2085e | 1698 | (void) poll(NULL, 0, ACTIVE_POLL_DELAY); |
85bb4663 | 1699 | } |
2acdc547 | 1700 | } |
4a744367 | 1701 | |
bf6c9bd6 JD |
1702 | ret = add_traces(ctx); |
1703 | if (ret < 0) { | |
1704 | goto end_free; | |
1705 | } | |
4a744367 JD |
1706 | |
1707 | begin_pos.type = BT_SEEK_BEGIN; | |
2acdc547 | 1708 | iter = bt_ctf_iter_create(ctx->bt_ctx, &begin_pos, NULL); |
4a744367 | 1709 | if (!iter) { |
f28fb4b6 JG |
1710 | if (lttng_live_should_quit()) { |
1711 | ret = 0; | |
1712 | goto end; | |
1713 | } | |
4a744367 JD |
1714 | fprintf(stderr, "[error] Iterator creation error\n"); |
1715 | goto end; | |
1716 | } | |
1717 | for (;;) { | |
8ace20bf | 1718 | if (lttng_live_should_quit()) { |
23285bf3 | 1719 | ret = 0; |
8ace20bf MD |
1720 | goto end_free; |
1721 | } | |
4a744367 JD |
1722 | event = bt_ctf_iter_read_event_flags(iter, &flags); |
1723 | if (!(flags & BT_ITER_FLAG_RETRY)) { | |
1724 | if (!event) { | |
1725 | /* End of trace */ | |
1726 | break; | |
1727 | } | |
1728 | ret = sout->parent.event_cb(&sout->parent, | |
1729 | event->parent->stream); | |
1730 | if (ret) { | |
1731 | fprintf(stderr, "[error] Writing " | |
1732 | "event failed.\n"); | |
1733 | goto end_free; | |
1734 | } | |
1735 | } | |
1736 | ret = bt_iter_next(bt_ctf_get_iter(iter)); | |
1737 | if (ret < 0) { | |
1738 | goto end_free; | |
1739 | } | |
1740 | } | |
1741 | bt_ctf_iter_destroy(iter); | |
2acdc547 JD |
1742 | g_hash_table_foreach_remove(ctx->session->ctf_traces, |
1743 | del_traces, ctx->bt_ctx); | |
1744 | ctx->session->stream_count = 0; | |
1745 | } | |
4a744367 JD |
1746 | |
1747 | end_free: | |
2acdc547 | 1748 | bt_context_put(ctx->bt_ctx); |
4a744367 | 1749 | end: |
f28fb4b6 JG |
1750 | if (lttng_live_should_quit()) { |
1751 | ret = 0; | |
1752 | } | |
23285bf3 | 1753 | return ret; |
4a744367 | 1754 | } |