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 | ||
62f11f74 | 53 | #include <babeltrace/endian.h> |
af701dc4 JD |
54 | #include <babeltrace/compat/memstream.h> |
55 | ||
c98627ca | 56 | #include "lttng-live.h" |
158eea6e | 57 | #include "lttng-viewer-abi.h" |
4a744367 | 58 | |
85e2085e MD |
59 | #define ACTIVE_POLL_DELAY 100 /* ms */ |
60 | ||
4a744367 JD |
61 | /* |
62 | * Memory allocation zeroed | |
63 | */ | |
64 | #define zmalloc(x) calloc(1, x) | |
65 | ||
66 | #ifndef max_t | |
67 | #define max_t(type, a, b) \ | |
68 | ((type) (a) > (type) (b) ? (type) (a) : (type) (b)) | |
69 | #endif | |
70 | ||
b5a1fa45 JD |
71 | static void ctf_live_packet_seek(struct bt_stream_pos *stream_pos, |
72 | size_t index, int whence); | |
2acdc547 JD |
73 | static void add_traces(gpointer key, gpointer value, gpointer user_data); |
74 | static int del_traces(gpointer key, gpointer value, gpointer user_data); | |
9abca178 | 75 | static int get_new_metadata(struct lttng_live_ctx *ctx, |
af701dc4 JD |
76 | struct lttng_live_viewer_stream *viewer_stream, |
77 | char **metadata_buf); | |
2acdc547 | 78 | |
b7e8a8e1 MD |
79 | static |
80 | ssize_t lttng_live_recv(int fd, void *buf, size_t len) | |
81 | { | |
82 | ssize_t ret; | |
83 | size_t copied = 0, to_copy = len; | |
84 | ||
85 | do { | |
86 | ret = recv(fd, buf + copied, to_copy, 0); | |
87 | if (ret > 0) { | |
88 | assert(ret <= to_copy); | |
89 | copied += ret; | |
90 | to_copy -= ret; | |
91 | } | |
92 | } while ((ret > 0 && to_copy > 0) | |
93 | || (ret < 0 && errno == EINTR)); | |
94 | if (ret > 0) | |
95 | ret = copied; | |
96 | /* ret = 0 means orderly shutdown, ret < 0 is error. */ | |
97 | return ret; | |
98 | } | |
99 | ||
100 | static | |
101 | ssize_t lttng_live_send(int fd, const void *buf, size_t len) | |
102 | { | |
103 | ssize_t ret; | |
104 | ||
105 | do { | |
106 | ret = send(fd, buf, len, MSG_NOSIGNAL); | |
107 | } while (ret < 0 && errno == EINTR); | |
108 | return ret; | |
109 | } | |
110 | ||
b5a1fa45 | 111 | int lttng_live_connect_viewer(struct lttng_live_ctx *ctx) |
4a744367 JD |
112 | { |
113 | struct hostent *host; | |
114 | struct sockaddr_in server_addr; | |
115 | int ret; | |
116 | ||
8ace20bf | 117 | if (lttng_live_should_quit()) { |
4a744367 JD |
118 | ret = -1; |
119 | goto end; | |
120 | } | |
121 | ||
8ace20bf MD |
122 | host = gethostbyname(ctx->relay_hostname); |
123 | if (!host) { | |
124 | fprintf(stderr, "[error] Cannot lookup hostname %s\n", | |
125 | ctx->relay_hostname); | |
126 | goto error; | |
127 | } | |
128 | ||
4a744367 JD |
129 | if ((ctx->control_sock = socket(AF_INET, SOCK_STREAM, 0)) == -1) { |
130 | perror("Socket"); | |
8ace20bf | 131 | goto error; |
4a744367 JD |
132 | } |
133 | ||
134 | server_addr.sin_family = AF_INET; | |
b5a1fa45 | 135 | server_addr.sin_port = htons(ctx->port); |
4a744367 JD |
136 | server_addr.sin_addr = *((struct in_addr *) host->h_addr); |
137 | bzero(&(server_addr.sin_zero), 8); | |
138 | ||
139 | if (connect(ctx->control_sock, (struct sockaddr *) &server_addr, | |
140 | sizeof(struct sockaddr)) == -1) { | |
141 | perror("Connect"); | |
8ace20bf | 142 | goto error; |
4a744367 JD |
143 | } |
144 | ||
145 | ret = 0; | |
146 | ||
147 | end: | |
148 | return ret; | |
8ace20bf MD |
149 | |
150 | error: | |
151 | fprintf(stderr, "[error] Connection failed\n"); | |
152 | return -1; | |
4a744367 JD |
153 | } |
154 | ||
155 | int lttng_live_establish_connection(struct lttng_live_ctx *ctx) | |
156 | { | |
157 | struct lttng_viewer_cmd cmd; | |
158 | struct lttng_viewer_connect connect; | |
159 | int ret; | |
160 | ssize_t ret_len; | |
161 | ||
8ace20bf MD |
162 | if (lttng_live_should_quit()) { |
163 | ret = -1; | |
164 | goto end; | |
165 | } | |
166 | ||
4a744367 JD |
167 | cmd.cmd = htobe32(LTTNG_VIEWER_CONNECT); |
168 | cmd.data_size = sizeof(connect); | |
169 | cmd.cmd_version = 0; | |
170 | ||
0c3cd7e1 | 171 | connect.viewer_session_id = -1ULL; /* will be set on recv */ |
4a744367 JD |
172 | connect.major = htobe32(LTTNG_LIVE_MAJOR); |
173 | connect.minor = htobe32(LTTNG_LIVE_MINOR); | |
174 | connect.type = htobe32(LTTNG_VIEWER_CLIENT_COMMAND); | |
175 | ||
b7e8a8e1 | 176 | ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd)); |
4a744367 | 177 | if (ret_len < 0) { |
79620497 | 178 | perror("[error] Error sending cmd"); |
4a744367 JD |
179 | goto error; |
180 | } | |
181 | assert(ret_len == sizeof(cmd)); | |
182 | ||
b7e8a8e1 | 183 | ret_len = lttng_live_send(ctx->control_sock, &connect, sizeof(connect)); |
4a744367 | 184 | if (ret_len < 0) { |
79620497 | 185 | perror("[error] Error sending version"); |
4a744367 JD |
186 | goto error; |
187 | } | |
188 | assert(ret_len == sizeof(connect)); | |
189 | ||
b7e8a8e1 | 190 | ret_len = lttng_live_recv(ctx->control_sock, &connect, sizeof(connect)); |
f8612f31 MD |
191 | if (ret_len == 0) { |
192 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
193 | goto error; |
194 | } | |
4a744367 | 195 | if (ret_len < 0) { |
79620497 | 196 | perror("[error] Error receiving version"); |
4a744367 JD |
197 | goto error; |
198 | } | |
199 | assert(ret_len == sizeof(connect)); | |
200 | ||
201 | printf_verbose("Received viewer session ID : %" PRIu64 "\n", | |
202 | be64toh(connect.viewer_session_id)); | |
203 | printf_verbose("Relayd version : %u.%u\n", be32toh(connect.major), | |
204 | be32toh(connect.minor)); | |
0dfc7b62 JD |
205 | |
206 | if (LTTNG_LIVE_MAJOR != be32toh(connect.major)) { | |
207 | fprintf(stderr, "[error] Incompatible lttng-relayd protocol\n"); | |
208 | goto error; | |
209 | } | |
210 | /* Use the smallest protocol version implemented. */ | |
211 | if (LTTNG_LIVE_MINOR > be32toh(connect.minor)) { | |
212 | ctx->minor = be32toh(connect.minor); | |
213 | } else { | |
214 | ctx->minor = LTTNG_LIVE_MINOR; | |
215 | } | |
216 | ctx->major = LTTNG_LIVE_MAJOR; | |
4a744367 | 217 | ret = 0; |
8ace20bf MD |
218 | end: |
219 | return ret; | |
4a744367 JD |
220 | |
221 | error: | |
8ace20bf MD |
222 | fprintf(stderr, "[error] Unable to establish connection\n"); |
223 | return -1; | |
4a744367 JD |
224 | } |
225 | ||
b5a1fa45 JD |
226 | static |
227 | void free_session_list(GPtrArray *session_list) | |
228 | { | |
229 | int i; | |
230 | struct lttng_live_relay_session *relay_session; | |
231 | ||
232 | for (i = 0; i < session_list->len; i++) { | |
233 | relay_session = g_ptr_array_index(session_list, i); | |
234 | free(relay_session->name); | |
235 | free(relay_session->hostname); | |
236 | } | |
237 | g_ptr_array_free(session_list, TRUE); | |
238 | } | |
239 | ||
240 | static | |
241 | void print_session_list(GPtrArray *session_list, const char *path) | |
242 | { | |
243 | int i; | |
244 | struct lttng_live_relay_session *relay_session; | |
245 | ||
246 | for (i = 0; i < session_list->len; i++) { | |
247 | relay_session = g_ptr_array_index(session_list, i); | |
248 | fprintf(stdout, "%s/host/%s/%s (timer = %u, " | |
249 | "%u stream(s), %u client(s) connected)\n", | |
250 | path, relay_session->hostname, | |
251 | relay_session->name, relay_session->timer, | |
252 | relay_session->streams, relay_session->clients); | |
253 | } | |
254 | } | |
255 | ||
256 | static | |
257 | void update_session_list(GPtrArray *session_list, char *hostname, | |
258 | char *session_name, uint32_t streams, uint32_t clients, | |
259 | uint32_t timer) | |
260 | { | |
261 | int i, found = 0; | |
262 | struct lttng_live_relay_session *relay_session; | |
263 | ||
264 | for (i = 0; i < session_list->len; i++) { | |
265 | relay_session = g_ptr_array_index(session_list, i); | |
266 | if ((strncmp(relay_session->hostname, hostname, NAME_MAX) == 0) && | |
267 | strncmp(relay_session->name, | |
268 | session_name, NAME_MAX) == 0) { | |
269 | relay_session->streams += streams; | |
270 | if (relay_session->clients < clients) | |
271 | relay_session->clients = clients; | |
272 | found = 1; | |
273 | break; | |
274 | } | |
275 | } | |
276 | if (found) | |
277 | return; | |
278 | ||
279 | relay_session = g_new0(struct lttng_live_relay_session, 1); | |
280 | relay_session->hostname = strndup(hostname, NAME_MAX); | |
281 | relay_session->name = strndup(session_name, NAME_MAX); | |
282 | relay_session->clients = clients; | |
283 | relay_session->streams = streams; | |
284 | relay_session->timer = timer; | |
285 | g_ptr_array_add(session_list, relay_session); | |
286 | } | |
287 | ||
4a744367 JD |
288 | int lttng_live_list_sessions(struct lttng_live_ctx *ctx, const char *path) |
289 | { | |
290 | struct lttng_viewer_cmd cmd; | |
291 | struct lttng_viewer_list_sessions list; | |
292 | struct lttng_viewer_session lsession; | |
b5a1fa45 | 293 | int i, ret, sessions_count, print_list = 0; |
4a744367 | 294 | ssize_t ret_len; |
b5a1fa45 JD |
295 | uint64_t session_id; |
296 | GPtrArray *session_list = NULL; | |
297 | ||
8ace20bf MD |
298 | if (lttng_live_should_quit()) { |
299 | ret = -1; | |
300 | goto end; | |
301 | } | |
302 | ||
b5a1fa45 JD |
303 | if (strlen(ctx->session_name) == 0) { |
304 | print_list = 1; | |
305 | session_list = g_ptr_array_new(); | |
306 | } | |
4a744367 JD |
307 | |
308 | cmd.cmd = htobe32(LTTNG_VIEWER_LIST_SESSIONS); | |
309 | cmd.data_size = 0; | |
310 | cmd.cmd_version = 0; | |
311 | ||
b7e8a8e1 | 312 | ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd)); |
4a744367 | 313 | if (ret_len < 0) { |
79620497 | 314 | perror("[error] Error sending cmd"); |
4a744367 JD |
315 | goto error; |
316 | } | |
317 | assert(ret_len == sizeof(cmd)); | |
318 | ||
b7e8a8e1 | 319 | ret_len = lttng_live_recv(ctx->control_sock, &list, sizeof(list)); |
f8612f31 MD |
320 | if (ret_len == 0) { |
321 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
322 | goto error; |
323 | } | |
4a744367 | 324 | if (ret_len < 0) { |
79620497 | 325 | perror("[error] Error receiving session list"); |
4a744367 JD |
326 | goto error; |
327 | } | |
328 | assert(ret_len == sizeof(list)); | |
329 | ||
330 | sessions_count = be32toh(list.sessions_count); | |
4a744367 | 331 | for (i = 0; i < sessions_count; i++) { |
b7e8a8e1 | 332 | ret_len = lttng_live_recv(ctx->control_sock, &lsession, sizeof(lsession)); |
f8612f31 MD |
333 | if (ret_len == 0) { |
334 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
335 | goto error; |
336 | } | |
4a744367 | 337 | if (ret_len < 0) { |
79620497 | 338 | perror("[error] Error receiving session"); |
4a744367 JD |
339 | goto error; |
340 | } | |
341 | assert(ret_len == sizeof(lsession)); | |
9ed31e53 MD |
342 | lsession.hostname[LTTNG_VIEWER_HOST_NAME_MAX - 1] = '\0'; |
343 | lsession.session_name[LTTNG_VIEWER_NAME_MAX - 1] = '\0'; | |
b5a1fa45 JD |
344 | session_id = be64toh(lsession.id); |
345 | ||
346 | if (print_list) { | |
347 | update_session_list(session_list, | |
348 | lsession.hostname, | |
349 | lsession.session_name, | |
350 | be32toh(lsession.streams), | |
351 | be32toh(lsession.clients), | |
352 | be32toh(lsession.live_timer)); | |
353 | } else { | |
354 | if ((strncmp(lsession.session_name, ctx->session_name, | |
355 | NAME_MAX) == 0) && (strncmp(lsession.hostname, | |
356 | ctx->traced_hostname, NAME_MAX) == 0)) { | |
357 | printf_verbose("Reading from session %" PRIu64 "\n", | |
358 | session_id); | |
359 | g_array_append_val(ctx->session_ids, | |
360 | session_id); | |
361 | } | |
362 | } | |
363 | } | |
4a744367 | 364 | |
b5a1fa45 JD |
365 | if (print_list) { |
366 | print_session_list(session_list, path); | |
367 | free_session_list(session_list); | |
4a744367 | 368 | } |
4a744367 | 369 | ret = 0; |
8ace20bf MD |
370 | end: |
371 | return ret; | |
4a744367 JD |
372 | |
373 | error: | |
8ace20bf MD |
374 | fprintf(stderr, "[error] Unable to list sessions\n"); |
375 | return -1; | |
4a744367 JD |
376 | } |
377 | ||
378 | int lttng_live_ctf_trace_assign(struct lttng_live_viewer_stream *stream, | |
379 | uint64_t ctf_trace_id) | |
380 | { | |
381 | struct lttng_live_ctf_trace *trace; | |
382 | int ret = 0; | |
383 | ||
384 | trace = g_hash_table_lookup(stream->session->ctf_traces, | |
385 | (gpointer) ctf_trace_id); | |
386 | if (!trace) { | |
387 | trace = g_new0(struct lttng_live_ctf_trace, 1); | |
4a744367 JD |
388 | trace->ctf_trace_id = ctf_trace_id; |
389 | trace->streams = g_ptr_array_new(); | |
390 | g_hash_table_insert(stream->session->ctf_traces, | |
391 | (gpointer) ctf_trace_id, | |
392 | trace); | |
393 | } | |
394 | if (stream->metadata_flag) | |
395 | trace->metadata_stream = stream; | |
396 | ||
397 | stream->ctf_trace = trace; | |
398 | g_ptr_array_add(trace->streams, stream); | |
399 | ||
4a744367 JD |
400 | return ret; |
401 | } | |
402 | ||
af701dc4 JD |
403 | static |
404 | int open_metadata_fp_write(struct lttng_live_viewer_stream *stream, | |
405 | char **metadata_buf, size_t *size) | |
406 | { | |
407 | int ret = 0; | |
408 | ||
409 | stream->metadata_fp_write = | |
410 | babeltrace_open_memstream(metadata_buf, size); | |
411 | if (!stream->metadata_fp_write) { | |
412 | perror("Metadata open_memstream"); | |
413 | ret = -1; | |
414 | } | |
415 | ||
416 | return ret; | |
417 | } | |
418 | ||
4a744367 JD |
419 | int lttng_live_attach_session(struct lttng_live_ctx *ctx, uint64_t id) |
420 | { | |
421 | struct lttng_viewer_cmd cmd; | |
422 | struct lttng_viewer_attach_session_request rq; | |
423 | struct lttng_viewer_attach_session_response rp; | |
424 | struct lttng_viewer_stream stream; | |
425 | int ret, i; | |
426 | ssize_t ret_len; | |
427 | ||
8ace20bf MD |
428 | if (lttng_live_should_quit()) { |
429 | ret = -1; | |
430 | goto end; | |
431 | } | |
432 | ||
4a744367 JD |
433 | cmd.cmd = htobe32(LTTNG_VIEWER_ATTACH_SESSION); |
434 | cmd.data_size = sizeof(rq); | |
435 | cmd.cmd_version = 0; | |
436 | ||
437 | memset(&rq, 0, sizeof(rq)); | |
438 | rq.session_id = htobe64(id); | |
439 | // TODO: add cmd line parameter to select seek beginning | |
440 | // rq.seek = htobe32(LTTNG_VIEWER_SEEK_BEGINNING); | |
441 | rq.seek = htobe32(LTTNG_VIEWER_SEEK_LAST); | |
442 | ||
b7e8a8e1 | 443 | ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd)); |
4a744367 | 444 | if (ret_len < 0) { |
79620497 | 445 | perror("[error] Error sending cmd"); |
4a744367 JD |
446 | goto error; |
447 | } | |
448 | assert(ret_len == sizeof(cmd)); | |
449 | ||
b7e8a8e1 | 450 | ret_len = lttng_live_send(ctx->control_sock, &rq, sizeof(rq)); |
4a744367 | 451 | if (ret_len < 0) { |
79620497 | 452 | perror("[error] Error sending attach request"); |
4a744367 JD |
453 | goto error; |
454 | } | |
455 | assert(ret_len == sizeof(rq)); | |
456 | ||
b7e8a8e1 | 457 | ret_len = lttng_live_recv(ctx->control_sock, &rp, sizeof(rp)); |
f8612f31 MD |
458 | if (ret_len == 0) { |
459 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
460 | goto error; |
461 | } | |
4a744367 | 462 | if (ret_len < 0) { |
79620497 | 463 | perror("[error] Error receiving attach response"); |
4a744367 JD |
464 | goto error; |
465 | } | |
466 | assert(ret_len == sizeof(rp)); | |
467 | ||
468 | switch(be32toh(rp.status)) { | |
469 | case LTTNG_VIEWER_ATTACH_OK: | |
470 | break; | |
471 | case LTTNG_VIEWER_ATTACH_UNK: | |
472 | ret = -LTTNG_VIEWER_ATTACH_UNK; | |
473 | goto end; | |
474 | case LTTNG_VIEWER_ATTACH_ALREADY: | |
79620497 | 475 | fprintf(stderr, "[error] There is already a viewer attached to this session\n"); |
8ace20bf | 476 | goto error; |
4a744367 JD |
477 | case LTTNG_VIEWER_ATTACH_NOT_LIVE: |
478 | fprintf(stderr, "[error] Not a live session\n"); | |
8ace20bf | 479 | goto error; |
4a744367 JD |
480 | case LTTNG_VIEWER_ATTACH_SEEK_ERR: |
481 | fprintf(stderr, "[error] Wrong seek parameter\n"); | |
8ace20bf | 482 | goto error; |
4a744367 JD |
483 | default: |
484 | fprintf(stderr, "[error] Unknown attach return code %u\n", | |
485 | be32toh(rp.status)); | |
8ace20bf | 486 | goto error; |
4a744367 JD |
487 | } |
488 | if (be32toh(rp.status) != LTTNG_VIEWER_ATTACH_OK) { | |
8ace20bf | 489 | goto error; |
4a744367 JD |
490 | } |
491 | ||
2acdc547 | 492 | ctx->session->stream_count += be32toh(rp.streams_count); |
4a744367 JD |
493 | /* |
494 | * When the session is created but not started, we do an active wait | |
495 | * until it starts. It allows the viewer to start processing the trace | |
496 | * as soon as the session starts. | |
497 | */ | |
498 | if (ctx->session->stream_count == 0) { | |
499 | ret = 0; | |
500 | goto end; | |
501 | } | |
502 | printf_verbose("Waiting for %" PRIu64 " streams:\n", | |
503 | ctx->session->stream_count); | |
504 | ctx->session->streams = g_new0(struct lttng_live_viewer_stream, | |
505 | ctx->session->stream_count); | |
4a744367 | 506 | for (i = 0; i < be32toh(rp.streams_count); i++) { |
b7e8a8e1 | 507 | ret_len = lttng_live_recv(ctx->control_sock, &stream, sizeof(stream)); |
f8612f31 MD |
508 | if (ret_len == 0) { |
509 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
510 | goto error; |
511 | } | |
4a744367 | 512 | if (ret_len < 0) { |
79620497 | 513 | perror("[error] Error receiving stream"); |
4a744367 JD |
514 | goto error; |
515 | } | |
516 | assert(ret_len == sizeof(stream)); | |
9ed31e53 MD |
517 | stream.path_name[LTTNG_VIEWER_PATH_MAX - 1] = '\0'; |
518 | stream.channel_name[LTTNG_VIEWER_NAME_MAX - 1] = '\0'; | |
4a744367 JD |
519 | |
520 | printf_verbose(" stream %" PRIu64 " : %s/%s\n", | |
521 | be64toh(stream.id), stream.path_name, | |
522 | stream.channel_name); | |
523 | ctx->session->streams[i].id = be64toh(stream.id); | |
524 | ctx->session->streams[i].session = ctx->session; | |
525 | ||
4a744367 | 526 | ctx->session->streams[i].mmap_size = 0; |
5805251d | 527 | ctx->session->streams[i].ctf_stream_id = -1ULL; |
4a744367 JD |
528 | |
529 | if (be32toh(stream.metadata_flag)) { | |
4a744367 | 530 | ctx->session->streams[i].metadata_flag = 1; |
4a744367 JD |
531 | } |
532 | ret = lttng_live_ctf_trace_assign(&ctx->session->streams[i], | |
533 | be64toh(stream.ctf_trace_id)); | |
534 | if (ret < 0) { | |
535 | goto error; | |
536 | } | |
537 | ||
538 | } | |
539 | ret = 0; | |
4a744367 | 540 | end: |
4a744367 | 541 | return ret; |
8ace20bf MD |
542 | |
543 | error: | |
544 | return -1; | |
4a744367 JD |
545 | } |
546 | ||
43273943 JD |
547 | /* |
548 | * Ask the relay for new streams. | |
549 | * | |
550 | * Returns the number of new streams received or a negative value on error. | |
551 | */ | |
2acdc547 JD |
552 | static |
553 | int ask_new_streams(struct lttng_live_ctx *ctx) | |
554 | { | |
43273943 | 555 | int i, ret = 0, nb_streams = 0; |
2acdc547 JD |
556 | uint64_t id; |
557 | ||
558 | restart: | |
559 | for (i = 0; i < ctx->session_ids->len; i++) { | |
560 | id = g_array_index(ctx->session_ids, uint64_t, i); | |
561 | ret = lttng_live_get_new_streams(ctx, id); | |
43273943 | 562 | printf_verbose("Asking for new streams returns %d\n", ret); |
2acdc547 | 563 | if (ret < 0) { |
f28fb4b6 JG |
564 | if (lttng_live_should_quit()) { |
565 | goto end; | |
566 | } | |
2acdc547 JD |
567 | if (ret == -LTTNG_VIEWER_NEW_STREAMS_HUP) { |
568 | printf_verbose("Session %" PRIu64 " closed\n", | |
569 | id); | |
b5a1fa45 JD |
570 | /* |
571 | * The streams have already been closed during | |
572 | * the reading, so we only need to get rid of | |
573 | * the trace in our internal table of sessions. | |
574 | */ | |
2acdc547 JD |
575 | g_array_remove_index(ctx->session_ids, i); |
576 | /* | |
577 | * We can't continue iterating on the g_array | |
578 | * after a remove, we have to start again. | |
579 | */ | |
580 | goto restart; | |
581 | } else { | |
582 | ret = -1; | |
583 | goto end; | |
584 | } | |
43273943 JD |
585 | } else { |
586 | nb_streams += ret; | |
2acdc547 JD |
587 | } |
588 | } | |
43273943 | 589 | ret = nb_streams; |
2acdc547 JD |
590 | |
591 | end: | |
592 | return ret; | |
593 | } | |
594 | ||
50d207af JD |
595 | static |
596 | int append_metadata(struct lttng_live_ctx *ctx, | |
597 | struct lttng_live_viewer_stream *viewer_stream) | |
598 | { | |
599 | int ret; | |
600 | struct lttng_live_viewer_stream *metadata; | |
601 | char *metadata_buf = NULL; | |
602 | ||
603 | printf_verbose("get_next_index: new metadata needed\n"); | |
604 | ret = get_new_metadata(ctx, viewer_stream, &metadata_buf); | |
605 | if (ret < 0) { | |
606 | free(metadata_buf); | |
607 | goto error; | |
608 | } | |
609 | ||
610 | metadata = viewer_stream->ctf_trace->metadata_stream; | |
611 | metadata->ctf_trace->metadata_fp = | |
612 | babeltrace_fmemopen(metadata_buf, | |
613 | metadata->metadata_len, "rb"); | |
614 | if (!metadata->ctf_trace->metadata_fp) { | |
615 | perror("Metadata fmemopen"); | |
616 | free(metadata_buf); | |
617 | ret = -1; | |
618 | goto error; | |
619 | } | |
620 | ret = ctf_append_trace_metadata( | |
621 | viewer_stream->ctf_trace->handle->td, | |
622 | metadata->ctf_trace->metadata_fp); | |
251fc08c MD |
623 | /* We accept empty metadata packets */ |
624 | if (ret != 0 && ret != -ENOENT) { | |
50d207af JD |
625 | fprintf(stderr, "[error] Appending metadata\n"); |
626 | goto error; | |
627 | } | |
251fc08c | 628 | ret = 0; |
50d207af JD |
629 | |
630 | error: | |
631 | return ret; | |
632 | } | |
633 | ||
4a744367 JD |
634 | static |
635 | int get_data_packet(struct lttng_live_ctx *ctx, | |
636 | struct ctf_stream_pos *pos, | |
637 | struct lttng_live_viewer_stream *stream, uint64_t offset, | |
638 | uint64_t len) | |
639 | { | |
640 | struct lttng_viewer_cmd cmd; | |
641 | struct lttng_viewer_get_packet rq; | |
642 | struct lttng_viewer_trace_packet rp; | |
643 | ssize_t ret_len; | |
644 | int ret; | |
645 | ||
50d207af | 646 | retry: |
8ace20bf MD |
647 | if (lttng_live_should_quit()) { |
648 | ret = -1; | |
649 | goto end; | |
650 | } | |
4a744367 JD |
651 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_PACKET); |
652 | cmd.data_size = sizeof(rq); | |
653 | cmd.cmd_version = 0; | |
654 | ||
655 | memset(&rq, 0, sizeof(rq)); | |
656 | rq.stream_id = htobe64(stream->id); | |
c1e8ac81 | 657 | rq.offset = htobe64(offset); |
4a744367 JD |
658 | rq.len = htobe32(len); |
659 | ||
b7e8a8e1 | 660 | ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd)); |
4a744367 | 661 | if (ret_len < 0) { |
79620497 | 662 | perror("[error] Error sending cmd"); |
4a744367 JD |
663 | goto error; |
664 | } | |
665 | assert(ret_len == sizeof(cmd)); | |
666 | ||
b7e8a8e1 | 667 | ret_len = lttng_live_send(ctx->control_sock, &rq, sizeof(rq)); |
4a744367 | 668 | if (ret_len < 0) { |
79620497 | 669 | perror("[error] Error sending get_data_packet request"); |
4a744367 JD |
670 | goto error; |
671 | } | |
672 | assert(ret_len == sizeof(rq)); | |
673 | ||
b7e8a8e1 | 674 | ret_len = lttng_live_recv(ctx->control_sock, &rp, sizeof(rp)); |
f8612f31 MD |
675 | if (ret_len == 0) { |
676 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
677 | goto error; |
678 | } | |
4a744367 | 679 | if (ret_len < 0) { |
79620497 | 680 | perror("[error] Error receiving data response"); |
4a744367 JD |
681 | goto error; |
682 | } | |
57b9d843 JD |
683 | if (ret_len != sizeof(rp)) { |
684 | fprintf(stderr, "[error] get_data_packet: expected %" PRId64 | |
a5e4b11e MD |
685 | ", received %" PRId64 "\n", sizeof(rp), |
686 | ret_len); | |
57b9d843 JD |
687 | goto error; |
688 | } | |
4a744367 JD |
689 | |
690 | rp.flags = be32toh(rp.flags); | |
691 | ||
692 | switch (be32toh(rp.status)) { | |
693 | case LTTNG_VIEWER_GET_PACKET_OK: | |
694 | len = be32toh(rp.len); | |
695 | printf_verbose("get_data_packet: Ok, packet size : %" PRIu64 | |
696 | "\n", len); | |
697 | break; | |
698 | case LTTNG_VIEWER_GET_PACKET_RETRY: | |
8ace20bf | 699 | /* Unimplemented by relay daemon */ |
4a744367 | 700 | printf_verbose("get_data_packet: retry\n"); |
8ace20bf | 701 | goto error; |
4a744367 JD |
702 | case LTTNG_VIEWER_GET_PACKET_ERR: |
703 | if (rp.flags & LTTNG_VIEWER_FLAG_NEW_METADATA) { | |
704 | printf_verbose("get_data_packet: new metadata needed\n"); | |
50d207af JD |
705 | ret = append_metadata(ctx, stream); |
706 | if (ret) | |
707 | goto error; | |
4a744367 | 708 | } |
2acdc547 | 709 | if (rp.flags & LTTNG_VIEWER_FLAG_NEW_STREAM) { |
f312b3aa | 710 | printf_verbose("get_data_packet: new streams needed\n"); |
2acdc547 JD |
711 | ret = ask_new_streams(ctx); |
712 | if (ret < 0) | |
713 | goto error; | |
43273943 JD |
714 | else if (ret > 0) |
715 | g_hash_table_foreach(ctx->session->ctf_traces, | |
716 | add_traces, ctx->bt_ctx); | |
2acdc547 | 717 | } |
f312b3aa MD |
718 | if (rp.flags & (LTTNG_VIEWER_FLAG_NEW_METADATA |
719 | | LTTNG_VIEWER_FLAG_NEW_STREAM)) { | |
720 | goto retry; | |
721 | } | |
4a744367 | 722 | fprintf(stderr, "[error] get_data_packet: error\n"); |
8ace20bf | 723 | goto error; |
4a744367 JD |
724 | case LTTNG_VIEWER_GET_PACKET_EOF: |
725 | ret = -2; | |
8ace20bf | 726 | goto end; |
4a744367 JD |
727 | default: |
728 | printf_verbose("get_data_packet: unknown\n"); | |
8ace20bf | 729 | goto error; |
4a744367 JD |
730 | } |
731 | ||
65ae9a82 | 732 | if (len == 0) { |
96943040 | 733 | goto error; |
4a744367 JD |
734 | } |
735 | ||
736 | if (len > stream->mmap_size) { | |
737 | uint64_t new_size; | |
738 | ||
739 | new_size = max_t(uint64_t, len, stream->mmap_size << 1); | |
740 | if (pos->base_mma) { | |
741 | /* unmap old base */ | |
742 | ret = munmap_align(pos->base_mma); | |
743 | if (ret) { | |
79620497 | 744 | perror("[error] Unable to unmap old base"); |
4a744367 JD |
745 | goto error; |
746 | } | |
747 | pos->base_mma = NULL; | |
748 | } | |
749 | pos->base_mma = mmap_align(new_size, | |
750 | PROT_READ | PROT_WRITE, | |
751 | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); | |
752 | if (pos->base_mma == MAP_FAILED) { | |
79620497 | 753 | perror("[error] mmap error"); |
4a744367 | 754 | pos->base_mma = NULL; |
4a744367 JD |
755 | goto error; |
756 | } | |
757 | ||
758 | stream->mmap_size = new_size; | |
759 | printf_verbose("Expanding stream mmap size to %" PRIu64 " bytes\n", | |
760 | stream->mmap_size); | |
761 | } | |
762 | ||
b7e8a8e1 MD |
763 | ret_len = lttng_live_recv(ctx->control_sock, |
764 | mmap_align_addr(pos->base_mma), len); | |
f8612f31 MD |
765 | if (ret_len == 0) { |
766 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
767 | goto error; |
768 | } | |
4a744367 | 769 | if (ret_len < 0) { |
79620497 | 770 | perror("[error] Error receiving trace packet"); |
4a744367 JD |
771 | goto error; |
772 | } | |
773 | assert(ret_len == len); | |
f312b3aa | 774 | ret = 0; |
4a744367 | 775 | end: |
4a744367 | 776 | return ret; |
8ace20bf MD |
777 | |
778 | error: | |
779 | return -1; | |
4a744367 JD |
780 | } |
781 | ||
4a744367 | 782 | static |
9abca178 JD |
783 | int get_one_metadata_packet(struct lttng_live_ctx *ctx, |
784 | struct lttng_live_viewer_stream *metadata_stream) | |
4a744367 JD |
785 | { |
786 | uint64_t len = 0; | |
787 | int ret; | |
788 | struct lttng_viewer_cmd cmd; | |
789 | struct lttng_viewer_get_metadata rq; | |
790 | struct lttng_viewer_metadata_packet rp; | |
4a744367 JD |
791 | char *data = NULL; |
792 | ssize_t ret_len; | |
793 | ||
8ace20bf MD |
794 | if (lttng_live_should_quit()) { |
795 | ret = -1; | |
796 | goto end; | |
797 | } | |
798 | ||
9abca178 | 799 | rq.stream_id = htobe64(metadata_stream->id); |
4a744367 JD |
800 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_METADATA); |
801 | cmd.data_size = sizeof(rq); | |
802 | cmd.cmd_version = 0; | |
803 | ||
b7e8a8e1 | 804 | ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd)); |
4a744367 | 805 | if (ret_len < 0) { |
79620497 | 806 | perror("[error] Error sending cmd"); |
4a744367 JD |
807 | goto error; |
808 | } | |
809 | assert(ret_len == sizeof(cmd)); | |
810 | ||
b7e8a8e1 | 811 | ret_len = lttng_live_send(ctx->control_sock, &rq, sizeof(rq)); |
4a744367 | 812 | if (ret_len < 0) { |
79620497 | 813 | perror("[error] Error sending get_metadata request"); |
4a744367 JD |
814 | goto error; |
815 | } | |
816 | assert(ret_len == sizeof(rq)); | |
817 | ||
b7e8a8e1 | 818 | ret_len = lttng_live_recv(ctx->control_sock, &rp, sizeof(rp)); |
f8612f31 MD |
819 | if (ret_len == 0) { |
820 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
821 | goto error; |
822 | } | |
4a744367 | 823 | if (ret_len < 0) { |
79620497 | 824 | perror("[error] Error receiving metadata response"); |
4a744367 JD |
825 | goto error; |
826 | } | |
827 | assert(ret_len == sizeof(rp)); | |
828 | ||
829 | switch (be32toh(rp.status)) { | |
830 | case LTTNG_VIEWER_METADATA_OK: | |
831 | printf_verbose("get_metadata : OK\n"); | |
832 | break; | |
833 | case LTTNG_VIEWER_NO_NEW_METADATA: | |
834 | printf_verbose("get_metadata : NO NEW\n"); | |
9abca178 | 835 | ret = 0; |
4a744367 JD |
836 | goto end; |
837 | case LTTNG_VIEWER_METADATA_ERR: | |
838 | printf_verbose("get_metadata : ERR\n"); | |
8ace20bf | 839 | goto error; |
4a744367 JD |
840 | default: |
841 | printf_verbose("get_metadata : UNKNOWN\n"); | |
8ace20bf | 842 | goto error; |
4a744367 JD |
843 | } |
844 | ||
845 | len = be64toh(rp.len); | |
846 | printf_verbose("Writing %" PRIu64" bytes to metadata\n", len); | |
847 | if (len <= 0) { | |
8ace20bf | 848 | goto error; |
4a744367 JD |
849 | } |
850 | ||
851 | data = zmalloc(len); | |
852 | if (!data) { | |
853 | perror("relay data zmalloc"); | |
4a744367 JD |
854 | goto error; |
855 | } | |
b7e8a8e1 | 856 | ret_len = lttng_live_recv(ctx->control_sock, data, len); |
f8612f31 MD |
857 | if (ret_len == 0) { |
858 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
8ace20bf | 859 | goto error_free_data; |
f8612f31 | 860 | } |
4a744367 | 861 | if (ret_len < 0) { |
79620497 | 862 | perror("[error] Error receiving trace packet"); |
8ace20bf | 863 | goto error_free_data; |
4a744367 JD |
864 | } |
865 | assert(ret_len == len); | |
866 | ||
867 | do { | |
af701dc4 JD |
868 | ret_len = fwrite(data, 1, len, |
869 | metadata_stream->metadata_fp_write); | |
4a744367 JD |
870 | } while (ret_len < 0 && errno == EINTR); |
871 | if (ret_len < 0) { | |
af701dc4 | 872 | fprintf(stderr, "[error] Writing in the metadata fp\n"); |
8ace20bf | 873 | goto error_free_data; |
4a744367 JD |
874 | } |
875 | assert(ret_len == len); | |
af701dc4 | 876 | metadata_stream->metadata_len += len; |
8ace20bf | 877 | free(data); |
9abca178 | 878 | ret = len; |
8ace20bf MD |
879 | end: |
880 | return ret; | |
4a744367 | 881 | |
8ace20bf | 882 | error_free_data: |
4a744367 | 883 | free(data); |
4a744367 | 884 | error: |
8ace20bf | 885 | return -1; |
4a744367 JD |
886 | } |
887 | ||
9abca178 JD |
888 | /* |
889 | * Return 0 on success, a negative value on error. | |
890 | */ | |
891 | static | |
892 | int get_new_metadata(struct lttng_live_ctx *ctx, | |
af701dc4 JD |
893 | struct lttng_live_viewer_stream *viewer_stream, |
894 | char **metadata_buf) | |
9abca178 JD |
895 | { |
896 | int ret = 0; | |
897 | struct lttng_live_viewer_stream *metadata_stream; | |
43273943 | 898 | size_t size, len_read = 0; |
9abca178 JD |
899 | |
900 | metadata_stream = viewer_stream->ctf_trace->metadata_stream; | |
50d207af JD |
901 | if (!metadata_stream) { |
902 | fprintf(stderr, "[error] No metadata stream\n"); | |
903 | ret = -1; | |
904 | goto error; | |
905 | } | |
af701dc4 JD |
906 | metadata_stream->metadata_len = 0; |
907 | ret = open_metadata_fp_write(metadata_stream, metadata_buf, &size); | |
908 | if (ret < 0) { | |
909 | goto error; | |
910 | } | |
9abca178 JD |
911 | |
912 | do { | |
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 | |
7def295f MD |
927 | if (fclose(metadata_stream->metadata_fp_write)) |
928 | perror("fclose"); | |
af701dc4 JD |
929 | metadata_stream->metadata_fp_write = NULL; |
930 | ||
931 | error: | |
9abca178 JD |
932 | return ret; |
933 | } | |
934 | ||
5805251d JD |
935 | /* |
936 | * Assign the fields from a lttng_viewer_index to a packet_index. | |
937 | */ | |
938 | static | |
939 | void lttng_index_to_packet_index(struct lttng_viewer_index *lindex, | |
940 | struct packet_index *pindex) | |
941 | { | |
942 | assert(lindex); | |
943 | assert(pindex); | |
944 | ||
945 | pindex->offset = be64toh(lindex->offset); | |
946 | pindex->packet_size = be64toh(lindex->packet_size); | |
947 | pindex->content_size = be64toh(lindex->content_size); | |
948 | pindex->ts_cycles.timestamp_begin = be64toh(lindex->timestamp_begin); | |
949 | pindex->ts_cycles.timestamp_end = be64toh(lindex->timestamp_end); | |
950 | pindex->events_discarded = be64toh(lindex->events_discarded); | |
951 | } | |
952 | ||
4a744367 JD |
953 | /* |
954 | * Get one index for a stream. | |
955 | * | |
956 | * Returns 0 on success or a negative value on error. | |
957 | */ | |
958 | static | |
959 | int get_next_index(struct lttng_live_ctx *ctx, | |
960 | struct lttng_live_viewer_stream *viewer_stream, | |
5805251d | 961 | struct packet_index *index, uint64_t *stream_id) |
4a744367 JD |
962 | { |
963 | struct lttng_viewer_cmd cmd; | |
964 | struct lttng_viewer_get_next_index rq; | |
4a744367 | 965 | int ret; |
4a744367 | 966 | ssize_t ret_len; |
5805251d | 967 | struct lttng_viewer_index *rp = &viewer_stream->current_index; |
4a744367 JD |
968 | |
969 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_NEXT_INDEX); | |
970 | cmd.data_size = sizeof(rq); | |
971 | cmd.cmd_version = 0; | |
972 | ||
973 | memset(&rq, 0, sizeof(rq)); | |
974 | rq.stream_id = htobe64(viewer_stream->id); | |
975 | ||
976 | retry: | |
8ace20bf MD |
977 | if (lttng_live_should_quit()) { |
978 | ret = -1; | |
979 | goto end; | |
980 | } | |
b7e8a8e1 | 981 | ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd)); |
4a744367 | 982 | if (ret_len < 0) { |
79620497 | 983 | perror("[error] Error sending cmd"); |
4a744367 JD |
984 | goto error; |
985 | } | |
986 | assert(ret_len == sizeof(cmd)); | |
987 | ||
b7e8a8e1 | 988 | ret_len = lttng_live_send(ctx->control_sock, &rq, sizeof(rq)); |
4a744367 | 989 | if (ret_len < 0) { |
79620497 | 990 | perror("[error] Error sending get_next_index request"); |
4a744367 JD |
991 | goto error; |
992 | } | |
993 | assert(ret_len == sizeof(rq)); | |
994 | ||
5805251d | 995 | ret_len = lttng_live_recv(ctx->control_sock, rp, sizeof(*rp)); |
f8612f31 MD |
996 | if (ret_len == 0) { |
997 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
998 | goto error; |
999 | } | |
4a744367 | 1000 | if (ret_len < 0) { |
79620497 | 1001 | perror("[error] Error receiving index response"); |
4a744367 JD |
1002 | goto error; |
1003 | } | |
5805251d | 1004 | assert(ret_len == sizeof(*rp)); |
4a744367 | 1005 | |
5805251d | 1006 | rp->flags = be32toh(rp->flags); |
4a744367 | 1007 | |
5805251d | 1008 | switch (be32toh(rp->status)) { |
4a744367 JD |
1009 | case LTTNG_VIEWER_INDEX_INACTIVE: |
1010 | printf_verbose("get_next_index: inactive\n"); | |
1011 | memset(index, 0, sizeof(struct packet_index)); | |
5805251d JD |
1012 | index->ts_cycles.timestamp_end = be64toh(rp->timestamp_end); |
1013 | *stream_id = be64toh(rp->stream_id); | |
4a744367 JD |
1014 | break; |
1015 | case LTTNG_VIEWER_INDEX_OK: | |
1016 | printf_verbose("get_next_index: Ok, need metadata update : %u\n", | |
5805251d JD |
1017 | rp->flags & LTTNG_VIEWER_FLAG_NEW_METADATA); |
1018 | lttng_index_to_packet_index(rp, index); | |
1019 | *stream_id = be64toh(rp->stream_id); | |
1020 | viewer_stream->data_pending = 1; | |
4a744367 | 1021 | |
5805251d | 1022 | if (rp->flags & LTTNG_VIEWER_FLAG_NEW_METADATA) { |
50d207af JD |
1023 | ret = append_metadata(ctx, viewer_stream); |
1024 | if (ret) | |
4a744367 | 1025 | goto error; |
4a744367 | 1026 | } |
5805251d | 1027 | if (rp->flags & LTTNG_VIEWER_FLAG_NEW_STREAM) { |
43273943 | 1028 | printf_verbose("get_next_index: need new streams\n"); |
2acdc547 JD |
1029 | ret = ask_new_streams(ctx); |
1030 | if (ret < 0) | |
1031 | goto error; | |
43273943 JD |
1032 | else if (ret > 0) |
1033 | g_hash_table_foreach(ctx->session->ctf_traces, | |
1034 | add_traces, ctx->bt_ctx); | |
2acdc547 | 1035 | } |
4a744367 JD |
1036 | break; |
1037 | case LTTNG_VIEWER_INDEX_RETRY: | |
1038 | printf_verbose("get_next_index: retry\n"); | |
85e2085e | 1039 | (void) poll(NULL, 0, ACTIVE_POLL_DELAY); |
4a744367 JD |
1040 | goto retry; |
1041 | case LTTNG_VIEWER_INDEX_HUP: | |
1042 | printf_verbose("get_next_index: stream hung up\n"); | |
1043 | viewer_stream->id = -1ULL; | |
4a744367 | 1044 | index->offset = EOF; |
2acdc547 | 1045 | ctx->session->stream_count--; |
4a744367 JD |
1046 | break; |
1047 | case LTTNG_VIEWER_INDEX_ERR: | |
1048 | fprintf(stderr, "[error] get_next_index: error\n"); | |
4a744367 JD |
1049 | goto error; |
1050 | default: | |
1051 | fprintf(stderr, "[error] get_next_index: unkwown value\n"); | |
4a744367 JD |
1052 | goto error; |
1053 | } | |
4a744367 | 1054 | ret = 0; |
8ace20bf MD |
1055 | end: |
1056 | return ret; | |
4a744367 JD |
1057 | |
1058 | error: | |
8ace20bf | 1059 | return -1; |
4a744367 JD |
1060 | } |
1061 | ||
5805251d JD |
1062 | static |
1063 | void read_packet_header(struct ctf_stream_pos *pos, | |
1064 | struct ctf_file_stream *file_stream) | |
1065 | { | |
1066 | int ret; | |
1067 | ||
1068 | /* update trace_packet_header and stream_packet_context */ | |
1069 | if (pos->prot != PROT_WRITE && file_stream->parent.trace_packet_header) { | |
1070 | /* Read packet header */ | |
1071 | ret = generic_rw(&pos->parent, | |
1072 | &file_stream->parent.trace_packet_header->p); | |
1073 | if (ret) { | |
1074 | pos->offset = EOF; | |
1075 | fprintf(stderr, "[error] trace packet " | |
1076 | "header read failed\n"); | |
1077 | goto end; | |
1078 | } | |
1079 | } | |
1080 | if (pos->prot != PROT_WRITE && file_stream->parent.stream_packet_context) { | |
1081 | /* Read packet context */ | |
1082 | ret = generic_rw(&pos->parent, | |
1083 | &file_stream->parent.stream_packet_context->p); | |
1084 | if (ret) { | |
1085 | pos->offset = EOF; | |
1086 | fprintf(stderr, "[error] stream packet " | |
1087 | "context read failed\n"); | |
1088 | goto end; | |
1089 | } | |
1090 | } | |
1091 | pos->data_offset = pos->offset; | |
1092 | ||
1093 | end: | |
1094 | return; | |
1095 | } | |
1096 | ||
1097 | /* | |
1098 | * Handle the seek parameters. | |
1099 | * Returns 0 if the packet_seek can continue, a positive value to | |
1100 | * cleanly exit the packet_seek, a negative value on error. | |
1101 | */ | |
1102 | static | |
1103 | int handle_seek_position(size_t index, int whence, | |
1104 | struct lttng_live_viewer_stream *viewer_stream, | |
1105 | struct ctf_stream_pos *pos, | |
1106 | struct ctf_file_stream *file_stream) | |
1107 | { | |
1108 | int ret; | |
1109 | ||
1110 | switch (whence) { | |
1111 | case SEEK_CUR: | |
1112 | ret = 0; | |
1113 | goto end; | |
1114 | case SEEK_SET: | |
1115 | /* | |
1116 | * We only allow to seek to 0. | |
1117 | */ | |
1118 | if (index != 0) { | |
1119 | fprintf(stderr, "[error] Arbitrary seek in lttng-live " | |
1120 | "trace not supported\n"); | |
1121 | pos->offset = EOF; | |
1122 | ret = -1; | |
1123 | goto end; | |
1124 | } | |
1125 | ||
1126 | ret = 0; | |
1127 | goto end; | |
1128 | ||
1129 | default: | |
1130 | fprintf(stderr, "[error] Invalid seek parameter\n"); | |
1131 | assert(0); | |
1132 | } | |
1133 | ||
1134 | end: | |
1135 | return ret; | |
1136 | } | |
1137 | ||
b5a1fa45 | 1138 | static |
4a744367 JD |
1139 | void ctf_live_packet_seek(struct bt_stream_pos *stream_pos, size_t index, |
1140 | int whence) | |
1141 | { | |
1142 | struct ctf_stream_pos *pos; | |
1143 | struct ctf_file_stream *file_stream; | |
f1f52630 | 1144 | struct packet_index *prev_index = NULL, *cur_index; |
4a744367 JD |
1145 | struct lttng_live_viewer_stream *viewer_stream; |
1146 | struct lttng_live_session *session; | |
5805251d | 1147 | uint64_t stream_id = -1ULL; |
4a744367 JD |
1148 | int ret; |
1149 | ||
4a744367 JD |
1150 | pos = ctf_pos(stream_pos); |
1151 | file_stream = container_of(pos, struct ctf_file_stream, pos); | |
1152 | viewer_stream = (struct lttng_live_viewer_stream *) pos->priv; | |
1153 | session = viewer_stream->session; | |
1154 | ||
5805251d JD |
1155 | ret = handle_seek_position(index, whence, viewer_stream, pos, |
1156 | file_stream); | |
1157 | if (ret != 0) { | |
1158 | return; | |
1159 | } | |
1160 | ||
1161 | retry: | |
f1f52630 MD |
1162 | switch (pos->packet_index->len) { |
1163 | case 0: | |
1164 | g_array_set_size(pos->packet_index, 1); | |
1165 | cur_index = &g_array_index(pos->packet_index, | |
1166 | struct packet_index, 0); | |
1167 | break; | |
1168 | case 1: | |
1169 | g_array_set_size(pos->packet_index, 2); | |
1170 | prev_index = &g_array_index(pos->packet_index, | |
1171 | struct packet_index, 0); | |
1172 | cur_index = &g_array_index(pos->packet_index, | |
1173 | struct packet_index, 1); | |
1174 | break; | |
1175 | case 2: | |
1176 | g_array_index(pos->packet_index, | |
1177 | struct packet_index, 0) = | |
1178 | g_array_index(pos->packet_index, | |
1179 | struct packet_index, 1); | |
1180 | prev_index = &g_array_index(pos->packet_index, | |
1181 | struct packet_index, 0); | |
1182 | cur_index = &g_array_index(pos->packet_index, | |
1183 | struct packet_index, 1); | |
1184 | break; | |
1185 | default: | |
1186 | abort(); | |
1187 | break; | |
1188 | } | |
5805251d JD |
1189 | |
1190 | if (viewer_stream->data_pending) { | |
1191 | lttng_index_to_packet_index(&viewer_stream->current_index, cur_index); | |
1192 | } else { | |
1193 | printf_verbose("get_next_index for stream %" PRIu64 "\n", viewer_stream->id); | |
1194 | ret = get_next_index(session->ctx, viewer_stream, cur_index, &stream_id); | |
1195 | if (ret < 0) { | |
1196 | pos->offset = EOF; | |
1197 | if (!lttng_live_should_quit()) { | |
1198 | fprintf(stderr, "[error] get_next_index failed\n"); | |
1199 | } | |
1200 | return; | |
f28fb4b6 | 1201 | } |
5805251d JD |
1202 | printf_verbose("Index received : packet_size : %" PRIu64 |
1203 | ", offset %" PRIu64 ", content_size %" PRIu64 | |
1204 | ", timestamp_end : %" PRIu64 "\n", | |
1205 | cur_index->packet_size, cur_index->offset, | |
1206 | cur_index->content_size, | |
1207 | cur_index->ts_cycles.timestamp_end); | |
1208 | ||
1209 | } | |
1210 | ||
1211 | /* | |
1212 | * On the first time we receive an index, the stream_id needs to | |
1213 | * be set for the stream in order to use it, we don't want any | |
1214 | * data at this stage. | |
1215 | */ | |
1216 | if (file_stream->parent.stream_id == -1ULL) { | |
1217 | /* | |
1218 | * Warning: with lttng-tools < 2.4.2, the beacon does not | |
1219 | * contain the real stream ID, it is memset to 0, so this | |
1220 | * might create a problem when a session has multiple | |
1221 | * channels. We can't detect it at this stage, lttng-tools | |
1222 | * has to be upgraded to fix this problem. | |
1223 | */ | |
1224 | printf_verbose("Assigning stream_id %" PRIu64 "\n", | |
1225 | stream_id); | |
1226 | file_stream->parent.stream_id = stream_id; | |
1227 | viewer_stream->ctf_stream_id = stream_id; | |
1228 | ||
4a744367 JD |
1229 | return; |
1230 | } | |
1231 | ||
f1f52630 MD |
1232 | pos->packet_size = cur_index->packet_size; |
1233 | pos->content_size = cur_index->content_size; | |
4a744367 | 1234 | pos->mmap_base_offset = 0; |
f1f52630 | 1235 | if (cur_index->offset == EOF) { |
4a744367 JD |
1236 | pos->offset = EOF; |
1237 | } else { | |
1238 | pos->offset = 0; | |
1239 | } | |
1240 | ||
f1f52630 | 1241 | if (cur_index->content_size == 0) { |
5805251d JD |
1242 | if (file_stream->parent.stream_class) { |
1243 | file_stream->parent.cycles_timestamp = | |
f1f52630 | 1244 | cur_index->ts_cycles.timestamp_end; |
5805251d JD |
1245 | file_stream->parent.real_timestamp = ctf_get_real_timestamp( |
1246 | &file_stream->parent, | |
1247 | cur_index->ts_cycles.timestamp_end); | |
1248 | } | |
4a744367 | 1249 | } else { |
5805251d JD |
1250 | if (file_stream->parent.stream_class) { |
1251 | /* Convert the timestamps and append to the real_index. */ | |
1252 | cur_index->ts_real.timestamp_begin = ctf_get_real_timestamp( | |
1253 | &file_stream->parent, | |
1254 | cur_index->ts_cycles.timestamp_begin); | |
1255 | cur_index->ts_real.timestamp_end = ctf_get_real_timestamp( | |
1256 | &file_stream->parent, | |
1257 | cur_index->ts_cycles.timestamp_end); | |
1258 | } | |
f1f52630 MD |
1259 | |
1260 | ctf_update_current_packet_index(&file_stream->parent, | |
1261 | prev_index, cur_index); | |
1262 | ||
1263 | file_stream->parent.cycles_timestamp = | |
1264 | cur_index->ts_cycles.timestamp_begin; | |
1265 | file_stream->parent.real_timestamp = | |
1266 | cur_index->ts_real.timestamp_begin; | |
4a744367 JD |
1267 | } |
1268 | ||
1269 | if (pos->packet_size == 0 || pos->offset == EOF) { | |
1270 | goto end; | |
1271 | } | |
1272 | ||
1273 | printf_verbose("get_data_packet for stream %" PRIu64 "\n", | |
1274 | viewer_stream->id); | |
1275 | ret = get_data_packet(session->ctx, pos, viewer_stream, | |
c1e8ac81 | 1276 | cur_index->offset, |
f1f52630 | 1277 | cur_index->packet_size / CHAR_BIT); |
4a744367 JD |
1278 | if (ret == -2) { |
1279 | goto retry; | |
1280 | } else if (ret < 0) { | |
1281 | pos->offset = EOF; | |
f28fb4b6 JG |
1282 | if (!lttng_live_should_quit()) { |
1283 | fprintf(stderr, "[error] get_data_packet failed\n"); | |
1284 | } | |
4a744367 JD |
1285 | return; |
1286 | } | |
5805251d | 1287 | viewer_stream->data_pending = 0; |
4a744367 | 1288 | |
5805251d | 1289 | read_packet_header(pos, file_stream); |
4a744367 JD |
1290 | |
1291 | end: | |
1292 | return; | |
1293 | } | |
1294 | ||
2acdc547 JD |
1295 | int lttng_live_create_viewer_session(struct lttng_live_ctx *ctx) |
1296 | { | |
1297 | struct lttng_viewer_cmd cmd; | |
1298 | struct lttng_viewer_create_session_response resp; | |
1299 | int ret; | |
1300 | ssize_t ret_len; | |
1301 | ||
8ace20bf MD |
1302 | if (lttng_live_should_quit()) { |
1303 | ret = -1; | |
1304 | goto end; | |
1305 | } | |
1306 | ||
2acdc547 JD |
1307 | cmd.cmd = htobe32(LTTNG_VIEWER_CREATE_SESSION); |
1308 | cmd.data_size = 0; | |
1309 | cmd.cmd_version = 0; | |
1310 | ||
b7e8a8e1 | 1311 | ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd)); |
2acdc547 | 1312 | if (ret_len < 0) { |
79620497 | 1313 | perror("[error] Error sending cmd"); |
2acdc547 JD |
1314 | goto error; |
1315 | } | |
1316 | assert(ret_len == sizeof(cmd)); | |
1317 | ||
b7e8a8e1 | 1318 | ret_len = lttng_live_recv(ctx->control_sock, &resp, sizeof(resp)); |
f8612f31 MD |
1319 | if (ret_len == 0) { |
1320 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
1321 | goto error; |
1322 | } | |
2acdc547 | 1323 | if (ret_len < 0) { |
79620497 | 1324 | perror("[error] Error receiving create session reply"); |
2acdc547 JD |
1325 | goto error; |
1326 | } | |
1327 | assert(ret_len == sizeof(resp)); | |
1328 | ||
1329 | if (be32toh(resp.status) != LTTNG_VIEWER_CREATE_SESSION_OK) { | |
1330 | fprintf(stderr, "[error] Error creating viewer session\n"); | |
2acdc547 JD |
1331 | goto error; |
1332 | } | |
1333 | ret = 0; | |
8ace20bf MD |
1334 | end: |
1335 | return ret; | |
2acdc547 JD |
1336 | |
1337 | error: | |
8ace20bf | 1338 | return -1; |
2acdc547 JD |
1339 | } |
1340 | ||
1341 | static | |
1342 | int del_traces(gpointer key, gpointer value, gpointer user_data) | |
4a744367 JD |
1343 | { |
1344 | struct bt_context *bt_ctx = user_data; | |
1345 | struct lttng_live_ctf_trace *trace = value; | |
1346 | int ret; | |
1347 | ||
1348 | ret = bt_context_remove_trace(bt_ctx, trace->trace_id); | |
1349 | if (ret < 0) | |
1350 | fprintf(stderr, "[error] removing trace from context\n"); | |
1351 | ||
1352 | /* remove the key/value pair from the HT. */ | |
1353 | return 1; | |
1354 | } | |
1355 | ||
2acdc547 JD |
1356 | static |
1357 | void add_traces(gpointer key, gpointer value, gpointer user_data) | |
4a744367 | 1358 | { |
9abca178 | 1359 | int i, ret; |
4a744367 JD |
1360 | struct bt_context *bt_ctx = user_data; |
1361 | struct lttng_live_ctf_trace *trace = value; | |
1362 | struct lttng_live_viewer_stream *stream; | |
1363 | struct bt_mmap_stream *new_mmap_stream; | |
1364 | struct bt_mmap_stream_list mmap_list; | |
1365 | struct lttng_live_ctx *ctx = NULL; | |
150595c4 JD |
1366 | struct bt_trace_descriptor *td; |
1367 | struct bt_trace_handle *handle; | |
4a744367 | 1368 | |
b5a1fa45 JD |
1369 | /* |
1370 | * We don't know how many streams we will receive for a trace, so | |
1371 | * once we are done receiving the traces, we add all the traces | |
1372 | * received to the bt_context. | |
1373 | * We can receive streams during the attach command or the | |
1374 | * get_new_streams, so we have to make sure not to add multiple | |
1375 | * times the same traces. | |
1376 | * If a trace is already in the context, we just skip this function. | |
1377 | */ | |
2acdc547 JD |
1378 | if (trace->in_use) |
1379 | return; | |
1380 | ||
4a744367 JD |
1381 | BT_INIT_LIST_HEAD(&mmap_list.head); |
1382 | ||
1383 | for (i = 0; i < trace->streams->len; i++) { | |
1384 | stream = g_ptr_array_index(trace->streams, i); | |
1385 | ctx = stream->session->ctx; | |
1386 | ||
1387 | if (!stream->metadata_flag) { | |
1388 | new_mmap_stream = zmalloc(sizeof(struct bt_mmap_stream)); | |
1389 | new_mmap_stream->priv = (void *) stream; | |
1390 | new_mmap_stream->fd = -1; | |
1391 | bt_list_add(&new_mmap_stream->list, &mmap_list.head); | |
1392 | } else { | |
af701dc4 JD |
1393 | char *metadata_buf = NULL; |
1394 | ||
4a744367 | 1395 | /* Get all possible metadata before starting */ |
af701dc4 JD |
1396 | ret = get_new_metadata(ctx, stream, &metadata_buf); |
1397 | if (ret) { | |
1398 | free(metadata_buf); | |
1399 | goto end_free; | |
1400 | } | |
1401 | if (!stream->metadata_len) { | |
1402 | fprintf(stderr, "[error] empty metadata\n"); | |
1403 | ret = -1; | |
1404 | free(metadata_buf); | |
1405 | goto end_free; | |
1406 | } | |
1407 | ||
1408 | trace->metadata_fp = babeltrace_fmemopen(metadata_buf, | |
1409 | stream->metadata_len, "rb"); | |
1410 | if (!trace->metadata_fp) { | |
1411 | perror("Metadata fmemopen"); | |
1412 | ret = -1; | |
1413 | free(metadata_buf); | |
9abca178 | 1414 | goto end_free; |
af701dc4 | 1415 | } |
4a744367 JD |
1416 | } |
1417 | } | |
1418 | ||
1419 | if (!trace->metadata_fp) { | |
1420 | fprintf(stderr, "[error] No metadata stream opened\n"); | |
1421 | goto end_free; | |
1422 | } | |
1423 | ||
1424 | ret = bt_context_add_trace(bt_ctx, NULL, "ctf", | |
1425 | ctf_live_packet_seek, &mmap_list, trace->metadata_fp); | |
1426 | if (ret < 0) { | |
1427 | fprintf(stderr, "[error] Error adding trace\n"); | |
1428 | goto end_free; | |
1429 | } | |
af701dc4 JD |
1430 | trace->metadata_stream->metadata_len = 0; |
1431 | ||
150595c4 JD |
1432 | handle = (struct bt_trace_handle *) g_hash_table_lookup( |
1433 | bt_ctx->trace_handles, | |
1434 | (gpointer) (unsigned long) ret); | |
1435 | td = handle->td; | |
1436 | trace->handle = handle; | |
2acdc547 | 1437 | if (bt_ctx->current_iterator) { |
2acdc547 JD |
1438 | bt_iter_add_trace(bt_ctx->current_iterator, td); |
1439 | } | |
1440 | ||
4a744367 | 1441 | trace->trace_id = ret; |
2acdc547 | 1442 | trace->in_use = 1; |
4a744367 JD |
1443 | |
1444 | goto end; | |
1445 | ||
1446 | end_free: | |
1447 | bt_context_put(bt_ctx); | |
1448 | end: | |
1449 | return; | |
1450 | } | |
1451 | ||
43273943 JD |
1452 | /* |
1453 | * Request new streams for a session. | |
1454 | * Returns the number of streams received or a negative value on error. | |
1455 | */ | |
2acdc547 | 1456 | int lttng_live_get_new_streams(struct lttng_live_ctx *ctx, uint64_t id) |
6192b988 JD |
1457 | { |
1458 | struct lttng_viewer_cmd cmd; | |
2acdc547 JD |
1459 | struct lttng_viewer_new_streams_request rq; |
1460 | struct lttng_viewer_new_streams_response rp; | |
1461 | struct lttng_viewer_stream stream; | |
43273943 | 1462 | int ret, i, nb_streams = 0; |
6192b988 | 1463 | ssize_t ret_len; |
b5a1fa45 | 1464 | uint32_t stream_count; |
6192b988 | 1465 | |
8ace20bf MD |
1466 | if (lttng_live_should_quit()) { |
1467 | ret = -1; | |
1468 | goto end; | |
1469 | } | |
1470 | ||
2acdc547 JD |
1471 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_NEW_STREAMS); |
1472 | cmd.data_size = sizeof(rq); | |
6192b988 JD |
1473 | cmd.cmd_version = 0; |
1474 | ||
2acdc547 JD |
1475 | memset(&rq, 0, sizeof(rq)); |
1476 | rq.session_id = htobe64(id); | |
1477 | ||
b7e8a8e1 | 1478 | ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd)); |
6192b988 | 1479 | if (ret_len < 0) { |
79620497 | 1480 | perror("[error] Error sending cmd"); |
6192b988 JD |
1481 | goto error; |
1482 | } | |
1483 | assert(ret_len == sizeof(cmd)); | |
1484 | ||
b7e8a8e1 | 1485 | ret_len = lttng_live_send(ctx->control_sock, &rq, sizeof(rq)); |
6192b988 | 1486 | if (ret_len < 0) { |
79620497 | 1487 | perror("[error] Error sending get_new_streams request"); |
6192b988 JD |
1488 | goto error; |
1489 | } | |
2acdc547 | 1490 | assert(ret_len == sizeof(rq)); |
6192b988 | 1491 | |
b7e8a8e1 | 1492 | ret_len = lttng_live_recv(ctx->control_sock, &rp, sizeof(rp)); |
f8612f31 MD |
1493 | if (ret_len == 0) { |
1494 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
1495 | goto error; |
1496 | } | |
2acdc547 | 1497 | if (ret_len < 0) { |
79620497 | 1498 | perror("[error] Error receiving get_new_streams response"); |
6192b988 JD |
1499 | goto error; |
1500 | } | |
2acdc547 JD |
1501 | assert(ret_len == sizeof(rp)); |
1502 | ||
1503 | switch(be32toh(rp.status)) { | |
1504 | case LTTNG_VIEWER_NEW_STREAMS_OK: | |
1505 | break; | |
1506 | case LTTNG_VIEWER_NEW_STREAMS_NO_NEW: | |
1507 | ret = 0; | |
1508 | goto end; | |
1509 | case LTTNG_VIEWER_NEW_STREAMS_HUP: | |
1510 | ret = -LTTNG_VIEWER_NEW_STREAMS_HUP; | |
1511 | goto end; | |
1512 | case LTTNG_VIEWER_NEW_STREAMS_ERR: | |
1513 | fprintf(stderr, "[error] get_new_streams error\n"); | |
8ace20bf | 1514 | goto error; |
2acdc547 JD |
1515 | default: |
1516 | fprintf(stderr, "[error] Unknown return code %u\n", | |
1517 | be32toh(rp.status)); | |
8ace20bf | 1518 | goto error; |
2acdc547 JD |
1519 | } |
1520 | ||
b5a1fa45 JD |
1521 | stream_count = be32toh(rp.streams_count); |
1522 | ctx->session->stream_count += stream_count; | |
2acdc547 JD |
1523 | /* |
1524 | * When the session is created but not started, we do an active wait | |
1525 | * until it starts. It allows the viewer to start processing the trace | |
1526 | * as soon as the session starts. | |
1527 | */ | |
1528 | if (ctx->session->stream_count == 0) { | |
1529 | ret = 0; | |
1530 | goto end; | |
1531 | } | |
1532 | printf_verbose("Waiting for %" PRIu64 " streams:\n", | |
1533 | ctx->session->stream_count); | |
1534 | ctx->session->streams = g_new0(struct lttng_live_viewer_stream, | |
1535 | ctx->session->stream_count); | |
b5a1fa45 | 1536 | for (i = 0; i < stream_count; i++) { |
b7e8a8e1 | 1537 | ret_len = lttng_live_recv(ctx->control_sock, &stream, sizeof(stream)); |
f8612f31 MD |
1538 | if (ret_len == 0) { |
1539 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
1540 | goto error; |
1541 | } | |
2acdc547 | 1542 | if (ret_len < 0) { |
79620497 | 1543 | perror("[error] Error receiving stream"); |
2acdc547 JD |
1544 | goto error; |
1545 | } | |
1546 | assert(ret_len == sizeof(stream)); | |
1547 | stream.path_name[LTTNG_VIEWER_PATH_MAX - 1] = '\0'; | |
1548 | stream.channel_name[LTTNG_VIEWER_NAME_MAX - 1] = '\0'; | |
1549 | ||
1550 | printf_verbose(" stream %" PRIu64 " : %s/%s\n", | |
1551 | be64toh(stream.id), stream.path_name, | |
1552 | stream.channel_name); | |
1553 | ctx->session->streams[i].id = be64toh(stream.id); | |
1554 | ctx->session->streams[i].session = ctx->session; | |
1555 | ||
2acdc547 | 1556 | ctx->session->streams[i].mmap_size = 0; |
5805251d | 1557 | ctx->session->streams[i].ctf_stream_id = -1ULL; |
2acdc547 JD |
1558 | |
1559 | if (be32toh(stream.metadata_flag)) { | |
2acdc547 | 1560 | ctx->session->streams[i].metadata_flag = 1; |
2acdc547 JD |
1561 | } |
1562 | ret = lttng_live_ctf_trace_assign(&ctx->session->streams[i], | |
1563 | be64toh(stream.ctf_trace_id)); | |
1564 | if (ret < 0) { | |
1565 | goto error; | |
1566 | } | |
43273943 | 1567 | nb_streams++; |
2acdc547 JD |
1568 | |
1569 | } | |
43273943 | 1570 | ret = nb_streams; |
2acdc547 | 1571 | end: |
6192b988 | 1572 | return ret; |
8ace20bf MD |
1573 | |
1574 | error: | |
1575 | return -1; | |
6192b988 JD |
1576 | } |
1577 | ||
23285bf3 | 1578 | int lttng_live_read(struct lttng_live_ctx *ctx) |
4a744367 | 1579 | { |
23285bf3 JG |
1580 | int ret = -1; |
1581 | int i; | |
4a744367 JD |
1582 | struct bt_ctf_iter *iter; |
1583 | const struct bt_ctf_event *event; | |
1584 | struct bt_iter_pos begin_pos; | |
1585 | struct bt_trace_descriptor *td_write; | |
1586 | struct bt_format *fmt_write; | |
1587 | struct ctf_text_stream_pos *sout; | |
2acdc547 | 1588 | uint64_t id; |
4a744367 | 1589 | |
2acdc547 JD |
1590 | ctx->bt_ctx = bt_context_create(); |
1591 | if (!ctx->bt_ctx) { | |
4a744367 JD |
1592 | fprintf(stderr, "[error] bt_context_create allocation\n"); |
1593 | goto end; | |
1594 | } | |
1595 | ||
1596 | fmt_write = bt_lookup_format(g_quark_from_static_string("text")); | |
1597 | if (!fmt_write) { | |
1598 | fprintf(stderr, "[error] ctf-text error\n"); | |
1599 | goto end; | |
1600 | } | |
1601 | ||
1602 | td_write = fmt_write->open_trace(NULL, O_RDWR, NULL, NULL); | |
1603 | if (!td_write) { | |
1604 | fprintf(stderr, "[error] Error opening output trace\n"); | |
1605 | goto end_free; | |
1606 | } | |
1607 | ||
1608 | sout = container_of(td_write, struct ctf_text_stream_pos, | |
1609 | trace_descriptor); | |
85bb4663 | 1610 | if (!sout->parent.event_cb) { |
4a744367 | 1611 | goto end_free; |
85bb4663 | 1612 | } |
4a744367 | 1613 | |
6192b988 JD |
1614 | ret = lttng_live_create_viewer_session(ctx); |
1615 | if (ret < 0) { | |
1616 | goto end_free; | |
1617 | } | |
1618 | ||
2acdc547 JD |
1619 | for (i = 0; i < ctx->session_ids->len; i++) { |
1620 | id = g_array_index(ctx->session_ids, uint64_t, i); | |
1621 | printf_verbose("Attaching to session %lu\n", id); | |
1622 | ret = lttng_live_attach_session(ctx, id); | |
1623 | printf_verbose("Attaching session returns %d\n", ret); | |
1624 | if (ret < 0) { | |
1625 | if (ret == -LTTNG_VIEWER_ATTACH_UNK) { | |
1626 | fprintf(stderr, "[error] Unknown session ID\n"); | |
1627 | } | |
1628 | goto end_free; | |
1629 | } | |
1630 | } | |
1631 | ||
4a744367 | 1632 | /* |
2acdc547 | 1633 | * As long as the session is active, we try to get new streams. |
4a744367 | 1634 | */ |
2acdc547 | 1635 | for (;;) { |
4a744367 JD |
1636 | int flags; |
1637 | ||
8ace20bf | 1638 | if (lttng_live_should_quit()) { |
23285bf3 | 1639 | ret = 0; |
8ace20bf MD |
1640 | goto end_free; |
1641 | } | |
1642 | ||
2acdc547 | 1643 | while (!ctx->session->stream_count) { |
8ace20bf MD |
1644 | if (lttng_live_should_quit() |
1645 | || ctx->session_ids->len == 0) { | |
23285bf3 | 1646 | ret = 0; |
4a744367 | 1647 | goto end_free; |
85bb4663 | 1648 | } |
2acdc547 | 1649 | ret = ask_new_streams(ctx); |
85bb4663 | 1650 | if (ret < 0) { |
2acdc547 | 1651 | goto end_free; |
85bb4663 MD |
1652 | } |
1653 | if (!ctx->session->stream_count) { | |
85e2085e | 1654 | (void) poll(NULL, 0, ACTIVE_POLL_DELAY); |
85bb4663 | 1655 | } |
2acdc547 | 1656 | } |
4a744367 | 1657 | |
2acdc547 JD |
1658 | g_hash_table_foreach(ctx->session->ctf_traces, add_traces, |
1659 | ctx->bt_ctx); | |
4a744367 JD |
1660 | |
1661 | begin_pos.type = BT_SEEK_BEGIN; | |
2acdc547 | 1662 | iter = bt_ctf_iter_create(ctx->bt_ctx, &begin_pos, NULL); |
4a744367 | 1663 | if (!iter) { |
f28fb4b6 JG |
1664 | if (lttng_live_should_quit()) { |
1665 | ret = 0; | |
1666 | goto end; | |
1667 | } | |
4a744367 JD |
1668 | fprintf(stderr, "[error] Iterator creation error\n"); |
1669 | goto end; | |
1670 | } | |
1671 | for (;;) { | |
8ace20bf | 1672 | if (lttng_live_should_quit()) { |
23285bf3 | 1673 | ret = 0; |
8ace20bf MD |
1674 | goto end_free; |
1675 | } | |
4a744367 JD |
1676 | event = bt_ctf_iter_read_event_flags(iter, &flags); |
1677 | if (!(flags & BT_ITER_FLAG_RETRY)) { | |
1678 | if (!event) { | |
1679 | /* End of trace */ | |
1680 | break; | |
1681 | } | |
1682 | ret = sout->parent.event_cb(&sout->parent, | |
1683 | event->parent->stream); | |
1684 | if (ret) { | |
1685 | fprintf(stderr, "[error] Writing " | |
1686 | "event failed.\n"); | |
1687 | goto end_free; | |
1688 | } | |
1689 | } | |
1690 | ret = bt_iter_next(bt_ctf_get_iter(iter)); | |
1691 | if (ret < 0) { | |
1692 | goto end_free; | |
1693 | } | |
1694 | } | |
1695 | bt_ctf_iter_destroy(iter); | |
2acdc547 JD |
1696 | g_hash_table_foreach_remove(ctx->session->ctf_traces, |
1697 | del_traces, ctx->bt_ctx); | |
1698 | ctx->session->stream_count = 0; | |
1699 | } | |
4a744367 JD |
1700 | |
1701 | end_free: | |
2acdc547 | 1702 | bt_context_put(ctx->bt_ctx); |
4a744367 | 1703 | end: |
f28fb4b6 JG |
1704 | if (lttng_live_should_quit()) { |
1705 | ret = 0; | |
1706 | } | |
23285bf3 | 1707 | return ret; |
4a744367 | 1708 | } |