Commit | Line | Data |
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4a744367 JD |
1 | /* |
2 | * Copyright (C) 2013 - Julien Desfossez <jdesfossez@efficios.com> | |
3 | * Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
4 | * | |
5 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
6 | * of this software and associated documentation files (the "Software"), to deal | |
7 | * in the Software without restriction, including without limitation the rights | |
8 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
9 | * copies of the Software, and to permit persons to whom the Software is | |
10 | * furnished to do so, subject to the following conditions: | |
11 | * | |
12 | * The above copyright notice and this permission notice shall be included in | |
13 | * all copies or substantial portions of the Software. | |
14 | * | |
15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
18 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
20 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
21 | * SOFTWARE. | |
22 | */ | |
23 | ||
24 | #include <sys/socket.h> | |
25 | #include <sys/types.h> | |
26 | #include <netinet/in.h> | |
27 | #include <netdb.h> | |
28 | #include <stdio.h> | |
29 | #include <string.h> | |
30 | #include <stdlib.h> | |
31 | #include <unistd.h> | |
32 | #include <errno.h> | |
33 | #include <inttypes.h> | |
34 | #include <fcntl.h> | |
35 | #include <sys/mman.h> | |
85e2085e | 36 | #include <poll.h> |
4a744367 JD |
37 | |
38 | #include <babeltrace/ctf/ctf-index.h> | |
39 | ||
40 | #include <babeltrace/babeltrace.h> | |
41 | #include <babeltrace/ctf/events.h> | |
42 | #include <babeltrace/ctf/callbacks.h> | |
43 | #include <babeltrace/ctf/iterator.h> | |
44 | ||
45 | /* for packet_index */ | |
46 | #include <babeltrace/ctf/types.h> | |
47 | ||
48 | #include <babeltrace/ctf/metadata.h> | |
49 | #include <babeltrace/ctf-text/types.h> | |
50 | #include <babeltrace/ctf/events-internal.h> | |
51 | #include <formats/ctf/events-private.h> | |
52 | ||
af701dc4 JD |
53 | #include <babeltrace/compat/memstream.h> |
54 | ||
c98627ca | 55 | #include "lttng-live.h" |
158eea6e | 56 | #include "lttng-viewer-abi.h" |
4a744367 | 57 | |
85e2085e MD |
58 | #define ACTIVE_POLL_DELAY 100 /* ms */ |
59 | ||
4a744367 JD |
60 | /* |
61 | * Memory allocation zeroed | |
62 | */ | |
63 | #define zmalloc(x) calloc(1, x) | |
64 | ||
65 | #ifndef max_t | |
66 | #define max_t(type, a, b) \ | |
67 | ((type) (a) > (type) (b) ? (type) (a) : (type) (b)) | |
68 | #endif | |
69 | ||
b5a1fa45 JD |
70 | static void ctf_live_packet_seek(struct bt_stream_pos *stream_pos, |
71 | size_t index, int whence); | |
2acdc547 JD |
72 | static void add_traces(gpointer key, gpointer value, gpointer user_data); |
73 | static int del_traces(gpointer key, gpointer value, gpointer user_data); | |
9abca178 | 74 | static int get_new_metadata(struct lttng_live_ctx *ctx, |
af701dc4 JD |
75 | struct lttng_live_viewer_stream *viewer_stream, |
76 | char **metadata_buf); | |
2acdc547 | 77 | |
b7e8a8e1 MD |
78 | static |
79 | ssize_t lttng_live_recv(int fd, void *buf, size_t len) | |
80 | { | |
81 | ssize_t ret; | |
82 | size_t copied = 0, to_copy = len; | |
83 | ||
84 | do { | |
85 | ret = recv(fd, buf + copied, to_copy, 0); | |
86 | if (ret > 0) { | |
87 | assert(ret <= to_copy); | |
88 | copied += ret; | |
89 | to_copy -= ret; | |
90 | } | |
91 | } while ((ret > 0 && to_copy > 0) | |
92 | || (ret < 0 && errno == EINTR)); | |
93 | if (ret > 0) | |
94 | ret = copied; | |
95 | /* ret = 0 means orderly shutdown, ret < 0 is error. */ | |
96 | return ret; | |
97 | } | |
98 | ||
99 | static | |
100 | ssize_t lttng_live_send(int fd, const void *buf, size_t len) | |
101 | { | |
102 | ssize_t ret; | |
103 | ||
104 | do { | |
105 | ret = send(fd, buf, len, MSG_NOSIGNAL); | |
106 | } while (ret < 0 && errno == EINTR); | |
107 | return ret; | |
108 | } | |
109 | ||
b5a1fa45 | 110 | int lttng_live_connect_viewer(struct lttng_live_ctx *ctx) |
4a744367 JD |
111 | { |
112 | struct hostent *host; | |
113 | struct sockaddr_in server_addr; | |
114 | int ret; | |
115 | ||
8ace20bf | 116 | if (lttng_live_should_quit()) { |
4a744367 JD |
117 | ret = -1; |
118 | goto end; | |
119 | } | |
120 | ||
8ace20bf MD |
121 | host = gethostbyname(ctx->relay_hostname); |
122 | if (!host) { | |
123 | fprintf(stderr, "[error] Cannot lookup hostname %s\n", | |
124 | ctx->relay_hostname); | |
125 | goto error; | |
126 | } | |
127 | ||
4a744367 JD |
128 | if ((ctx->control_sock = socket(AF_INET, SOCK_STREAM, 0)) == -1) { |
129 | perror("Socket"); | |
8ace20bf | 130 | goto error; |
4a744367 JD |
131 | } |
132 | ||
133 | server_addr.sin_family = AF_INET; | |
b5a1fa45 | 134 | server_addr.sin_port = htons(ctx->port); |
4a744367 JD |
135 | server_addr.sin_addr = *((struct in_addr *) host->h_addr); |
136 | bzero(&(server_addr.sin_zero), 8); | |
137 | ||
138 | if (connect(ctx->control_sock, (struct sockaddr *) &server_addr, | |
139 | sizeof(struct sockaddr)) == -1) { | |
140 | perror("Connect"); | |
8ace20bf | 141 | goto error; |
4a744367 JD |
142 | } |
143 | ||
144 | ret = 0; | |
145 | ||
146 | end: | |
147 | return ret; | |
8ace20bf MD |
148 | |
149 | error: | |
150 | fprintf(stderr, "[error] Connection failed\n"); | |
151 | return -1; | |
4a744367 JD |
152 | } |
153 | ||
154 | int lttng_live_establish_connection(struct lttng_live_ctx *ctx) | |
155 | { | |
156 | struct lttng_viewer_cmd cmd; | |
157 | struct lttng_viewer_connect connect; | |
158 | int ret; | |
159 | ssize_t ret_len; | |
160 | ||
8ace20bf MD |
161 | if (lttng_live_should_quit()) { |
162 | ret = -1; | |
163 | goto end; | |
164 | } | |
165 | ||
4a744367 JD |
166 | cmd.cmd = htobe32(LTTNG_VIEWER_CONNECT); |
167 | cmd.data_size = sizeof(connect); | |
168 | cmd.cmd_version = 0; | |
169 | ||
0c3cd7e1 | 170 | connect.viewer_session_id = -1ULL; /* will be set on recv */ |
4a744367 JD |
171 | connect.major = htobe32(LTTNG_LIVE_MAJOR); |
172 | connect.minor = htobe32(LTTNG_LIVE_MINOR); | |
173 | connect.type = htobe32(LTTNG_VIEWER_CLIENT_COMMAND); | |
174 | ||
b7e8a8e1 | 175 | ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd)); |
4a744367 | 176 | if (ret_len < 0) { |
79620497 | 177 | perror("[error] Error sending cmd"); |
4a744367 JD |
178 | goto error; |
179 | } | |
180 | assert(ret_len == sizeof(cmd)); | |
181 | ||
b7e8a8e1 | 182 | ret_len = lttng_live_send(ctx->control_sock, &connect, sizeof(connect)); |
4a744367 | 183 | if (ret_len < 0) { |
79620497 | 184 | perror("[error] Error sending version"); |
4a744367 JD |
185 | goto error; |
186 | } | |
187 | assert(ret_len == sizeof(connect)); | |
188 | ||
b7e8a8e1 | 189 | ret_len = lttng_live_recv(ctx->control_sock, &connect, sizeof(connect)); |
f8612f31 MD |
190 | if (ret_len == 0) { |
191 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
192 | goto error; |
193 | } | |
4a744367 | 194 | if (ret_len < 0) { |
79620497 | 195 | perror("[error] Error receiving version"); |
4a744367 JD |
196 | goto error; |
197 | } | |
198 | assert(ret_len == sizeof(connect)); | |
199 | ||
200 | printf_verbose("Received viewer session ID : %" PRIu64 "\n", | |
201 | be64toh(connect.viewer_session_id)); | |
202 | printf_verbose("Relayd version : %u.%u\n", be32toh(connect.major), | |
203 | be32toh(connect.minor)); | |
9aa155c5 JD |
204 | |
205 | if (LTTNG_LIVE_MAJOR != be32toh(connect.major)) { | |
206 | fprintf(stderr, "[error] Incompatible lttng-relayd protocol\n"); | |
207 | goto error; | |
208 | } | |
209 | /* Use the smallest protocol version implemented. */ | |
210 | if (LTTNG_LIVE_MINOR > be32toh(connect.minor)) { | |
211 | ctx->minor = be32toh(connect.minor); | |
212 | } else { | |
213 | ctx->minor = LTTNG_LIVE_MINOR; | |
214 | } | |
215 | ctx->major = LTTNG_LIVE_MAJOR; | |
4a744367 | 216 | ret = 0; |
8ace20bf MD |
217 | end: |
218 | return ret; | |
4a744367 JD |
219 | |
220 | error: | |
8ace20bf MD |
221 | fprintf(stderr, "[error] Unable to establish connection\n"); |
222 | return -1; | |
4a744367 JD |
223 | } |
224 | ||
b5a1fa45 JD |
225 | static |
226 | void free_session_list(GPtrArray *session_list) | |
227 | { | |
228 | int i; | |
229 | struct lttng_live_relay_session *relay_session; | |
230 | ||
231 | for (i = 0; i < session_list->len; i++) { | |
232 | relay_session = g_ptr_array_index(session_list, i); | |
233 | free(relay_session->name); | |
234 | free(relay_session->hostname); | |
235 | } | |
236 | g_ptr_array_free(session_list, TRUE); | |
237 | } | |
238 | ||
239 | static | |
240 | void print_session_list(GPtrArray *session_list, const char *path) | |
241 | { | |
242 | int i; | |
243 | struct lttng_live_relay_session *relay_session; | |
244 | ||
245 | for (i = 0; i < session_list->len; i++) { | |
246 | relay_session = g_ptr_array_index(session_list, i); | |
247 | fprintf(stdout, "%s/host/%s/%s (timer = %u, " | |
248 | "%u stream(s), %u client(s) connected)\n", | |
249 | path, relay_session->hostname, | |
250 | relay_session->name, relay_session->timer, | |
251 | relay_session->streams, relay_session->clients); | |
252 | } | |
253 | } | |
254 | ||
255 | static | |
256 | void update_session_list(GPtrArray *session_list, char *hostname, | |
257 | char *session_name, uint32_t streams, uint32_t clients, | |
258 | uint32_t timer) | |
259 | { | |
260 | int i, found = 0; | |
261 | struct lttng_live_relay_session *relay_session; | |
262 | ||
263 | for (i = 0; i < session_list->len; i++) { | |
264 | relay_session = g_ptr_array_index(session_list, i); | |
265 | if ((strncmp(relay_session->hostname, hostname, NAME_MAX) == 0) && | |
266 | strncmp(relay_session->name, | |
267 | session_name, NAME_MAX) == 0) { | |
268 | relay_session->streams += streams; | |
269 | if (relay_session->clients < clients) | |
270 | relay_session->clients = clients; | |
271 | found = 1; | |
272 | break; | |
273 | } | |
274 | } | |
275 | if (found) | |
276 | return; | |
277 | ||
278 | relay_session = g_new0(struct lttng_live_relay_session, 1); | |
279 | relay_session->hostname = strndup(hostname, NAME_MAX); | |
280 | relay_session->name = strndup(session_name, NAME_MAX); | |
281 | relay_session->clients = clients; | |
282 | relay_session->streams = streams; | |
283 | relay_session->timer = timer; | |
284 | g_ptr_array_add(session_list, relay_session); | |
285 | } | |
286 | ||
4a744367 JD |
287 | int lttng_live_list_sessions(struct lttng_live_ctx *ctx, const char *path) |
288 | { | |
289 | struct lttng_viewer_cmd cmd; | |
290 | struct lttng_viewer_list_sessions list; | |
291 | struct lttng_viewer_session lsession; | |
b5a1fa45 | 292 | int i, ret, sessions_count, print_list = 0; |
4a744367 | 293 | ssize_t ret_len; |
b5a1fa45 JD |
294 | uint64_t session_id; |
295 | GPtrArray *session_list = NULL; | |
296 | ||
8ace20bf MD |
297 | if (lttng_live_should_quit()) { |
298 | ret = -1; | |
299 | goto end; | |
300 | } | |
301 | ||
b5a1fa45 JD |
302 | if (strlen(ctx->session_name) == 0) { |
303 | print_list = 1; | |
304 | session_list = g_ptr_array_new(); | |
305 | } | |
4a744367 JD |
306 | |
307 | cmd.cmd = htobe32(LTTNG_VIEWER_LIST_SESSIONS); | |
308 | cmd.data_size = 0; | |
309 | cmd.cmd_version = 0; | |
310 | ||
b7e8a8e1 | 311 | ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd)); |
4a744367 | 312 | if (ret_len < 0) { |
79620497 | 313 | perror("[error] Error sending cmd"); |
4a744367 JD |
314 | goto error; |
315 | } | |
316 | assert(ret_len == sizeof(cmd)); | |
317 | ||
b7e8a8e1 | 318 | ret_len = lttng_live_recv(ctx->control_sock, &list, sizeof(list)); |
f8612f31 MD |
319 | if (ret_len == 0) { |
320 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
321 | goto error; |
322 | } | |
4a744367 | 323 | if (ret_len < 0) { |
79620497 | 324 | perror("[error] Error receiving session list"); |
4a744367 JD |
325 | goto error; |
326 | } | |
327 | assert(ret_len == sizeof(list)); | |
328 | ||
329 | sessions_count = be32toh(list.sessions_count); | |
4a744367 | 330 | for (i = 0; i < sessions_count; i++) { |
b7e8a8e1 | 331 | ret_len = lttng_live_recv(ctx->control_sock, &lsession, sizeof(lsession)); |
f8612f31 MD |
332 | if (ret_len == 0) { |
333 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
334 | goto error; |
335 | } | |
4a744367 | 336 | if (ret_len < 0) { |
79620497 | 337 | perror("[error] Error receiving session"); |
4a744367 JD |
338 | goto error; |
339 | } | |
340 | assert(ret_len == sizeof(lsession)); | |
9ed31e53 MD |
341 | lsession.hostname[LTTNG_VIEWER_HOST_NAME_MAX - 1] = '\0'; |
342 | lsession.session_name[LTTNG_VIEWER_NAME_MAX - 1] = '\0'; | |
b5a1fa45 JD |
343 | session_id = be64toh(lsession.id); |
344 | ||
345 | if (print_list) { | |
346 | update_session_list(session_list, | |
347 | lsession.hostname, | |
348 | lsession.session_name, | |
349 | be32toh(lsession.streams), | |
350 | be32toh(lsession.clients), | |
351 | be32toh(lsession.live_timer)); | |
352 | } else { | |
353 | if ((strncmp(lsession.session_name, ctx->session_name, | |
354 | NAME_MAX) == 0) && (strncmp(lsession.hostname, | |
355 | ctx->traced_hostname, NAME_MAX) == 0)) { | |
356 | printf_verbose("Reading from session %" PRIu64 "\n", | |
357 | session_id); | |
358 | g_array_append_val(ctx->session_ids, | |
359 | session_id); | |
360 | } | |
361 | } | |
362 | } | |
4a744367 | 363 | |
b5a1fa45 JD |
364 | if (print_list) { |
365 | print_session_list(session_list, path); | |
366 | free_session_list(session_list); | |
4a744367 | 367 | } |
4a744367 | 368 | ret = 0; |
8ace20bf MD |
369 | end: |
370 | return ret; | |
4a744367 JD |
371 | |
372 | error: | |
8ace20bf MD |
373 | fprintf(stderr, "[error] Unable to list sessions\n"); |
374 | return -1; | |
4a744367 JD |
375 | } |
376 | ||
377 | int lttng_live_ctf_trace_assign(struct lttng_live_viewer_stream *stream, | |
378 | uint64_t ctf_trace_id) | |
379 | { | |
380 | struct lttng_live_ctf_trace *trace; | |
381 | int ret = 0; | |
382 | ||
383 | trace = g_hash_table_lookup(stream->session->ctf_traces, | |
384 | (gpointer) ctf_trace_id); | |
385 | if (!trace) { | |
386 | trace = g_new0(struct lttng_live_ctf_trace, 1); | |
4a744367 JD |
387 | trace->ctf_trace_id = ctf_trace_id; |
388 | trace->streams = g_ptr_array_new(); | |
389 | g_hash_table_insert(stream->session->ctf_traces, | |
390 | (gpointer) ctf_trace_id, | |
391 | trace); | |
392 | } | |
393 | if (stream->metadata_flag) | |
394 | trace->metadata_stream = stream; | |
395 | ||
396 | stream->ctf_trace = trace; | |
397 | g_ptr_array_add(trace->streams, stream); | |
398 | ||
4a744367 JD |
399 | return ret; |
400 | } | |
401 | ||
af701dc4 JD |
402 | static |
403 | int open_metadata_fp_write(struct lttng_live_viewer_stream *stream, | |
404 | char **metadata_buf, size_t *size) | |
405 | { | |
406 | int ret = 0; | |
407 | ||
408 | stream->metadata_fp_write = | |
409 | babeltrace_open_memstream(metadata_buf, size); | |
410 | if (!stream->metadata_fp_write) { | |
411 | perror("Metadata open_memstream"); | |
412 | ret = -1; | |
413 | } | |
414 | ||
415 | return ret; | |
416 | } | |
417 | ||
4a744367 JD |
418 | int lttng_live_attach_session(struct lttng_live_ctx *ctx, uint64_t id) |
419 | { | |
420 | struct lttng_viewer_cmd cmd; | |
421 | struct lttng_viewer_attach_session_request rq; | |
422 | struct lttng_viewer_attach_session_response rp; | |
423 | struct lttng_viewer_stream stream; | |
424 | int ret, i; | |
425 | ssize_t ret_len; | |
426 | ||
8ace20bf MD |
427 | if (lttng_live_should_quit()) { |
428 | ret = -1; | |
429 | goto end; | |
430 | } | |
431 | ||
4a744367 JD |
432 | cmd.cmd = htobe32(LTTNG_VIEWER_ATTACH_SESSION); |
433 | cmd.data_size = sizeof(rq); | |
434 | cmd.cmd_version = 0; | |
435 | ||
436 | memset(&rq, 0, sizeof(rq)); | |
437 | rq.session_id = htobe64(id); | |
438 | // TODO: add cmd line parameter to select seek beginning | |
439 | // rq.seek = htobe32(LTTNG_VIEWER_SEEK_BEGINNING); | |
440 | rq.seek = htobe32(LTTNG_VIEWER_SEEK_LAST); | |
441 | ||
b7e8a8e1 | 442 | ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd)); |
4a744367 | 443 | if (ret_len < 0) { |
79620497 | 444 | perror("[error] Error sending cmd"); |
4a744367 JD |
445 | goto error; |
446 | } | |
447 | assert(ret_len == sizeof(cmd)); | |
448 | ||
b7e8a8e1 | 449 | ret_len = lttng_live_send(ctx->control_sock, &rq, sizeof(rq)); |
4a744367 | 450 | if (ret_len < 0) { |
79620497 | 451 | perror("[error] Error sending attach request"); |
4a744367 JD |
452 | goto error; |
453 | } | |
454 | assert(ret_len == sizeof(rq)); | |
455 | ||
b7e8a8e1 | 456 | ret_len = lttng_live_recv(ctx->control_sock, &rp, sizeof(rp)); |
f8612f31 MD |
457 | if (ret_len == 0) { |
458 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
459 | goto error; |
460 | } | |
4a744367 | 461 | if (ret_len < 0) { |
79620497 | 462 | perror("[error] Error receiving attach response"); |
4a744367 JD |
463 | goto error; |
464 | } | |
465 | assert(ret_len == sizeof(rp)); | |
466 | ||
467 | switch(be32toh(rp.status)) { | |
468 | case LTTNG_VIEWER_ATTACH_OK: | |
469 | break; | |
470 | case LTTNG_VIEWER_ATTACH_UNK: | |
471 | ret = -LTTNG_VIEWER_ATTACH_UNK; | |
472 | goto end; | |
473 | case LTTNG_VIEWER_ATTACH_ALREADY: | |
79620497 | 474 | fprintf(stderr, "[error] There is already a viewer attached to this session\n"); |
8ace20bf | 475 | goto error; |
4a744367 JD |
476 | case LTTNG_VIEWER_ATTACH_NOT_LIVE: |
477 | fprintf(stderr, "[error] Not a live session\n"); | |
8ace20bf | 478 | goto error; |
4a744367 JD |
479 | case LTTNG_VIEWER_ATTACH_SEEK_ERR: |
480 | fprintf(stderr, "[error] Wrong seek parameter\n"); | |
8ace20bf | 481 | goto error; |
4a744367 JD |
482 | default: |
483 | fprintf(stderr, "[error] Unknown attach return code %u\n", | |
484 | be32toh(rp.status)); | |
8ace20bf | 485 | goto error; |
4a744367 JD |
486 | } |
487 | if (be32toh(rp.status) != LTTNG_VIEWER_ATTACH_OK) { | |
8ace20bf | 488 | goto error; |
4a744367 JD |
489 | } |
490 | ||
2acdc547 | 491 | ctx->session->stream_count += be32toh(rp.streams_count); |
4a744367 JD |
492 | /* |
493 | * When the session is created but not started, we do an active wait | |
494 | * until it starts. It allows the viewer to start processing the trace | |
495 | * as soon as the session starts. | |
496 | */ | |
497 | if (ctx->session->stream_count == 0) { | |
498 | ret = 0; | |
499 | goto end; | |
500 | } | |
501 | printf_verbose("Waiting for %" PRIu64 " streams:\n", | |
502 | ctx->session->stream_count); | |
503 | ctx->session->streams = g_new0(struct lttng_live_viewer_stream, | |
504 | ctx->session->stream_count); | |
4a744367 | 505 | for (i = 0; i < be32toh(rp.streams_count); i++) { |
b7e8a8e1 | 506 | ret_len = lttng_live_recv(ctx->control_sock, &stream, sizeof(stream)); |
f8612f31 MD |
507 | if (ret_len == 0) { |
508 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
509 | goto error; |
510 | } | |
4a744367 | 511 | if (ret_len < 0) { |
79620497 | 512 | perror("[error] Error receiving stream"); |
4a744367 JD |
513 | goto error; |
514 | } | |
515 | assert(ret_len == sizeof(stream)); | |
9ed31e53 MD |
516 | stream.path_name[LTTNG_VIEWER_PATH_MAX - 1] = '\0'; |
517 | stream.channel_name[LTTNG_VIEWER_NAME_MAX - 1] = '\0'; | |
4a744367 JD |
518 | |
519 | printf_verbose(" stream %" PRIu64 " : %s/%s\n", | |
520 | be64toh(stream.id), stream.path_name, | |
521 | stream.channel_name); | |
522 | ctx->session->streams[i].id = be64toh(stream.id); | |
523 | ctx->session->streams[i].session = ctx->session; | |
524 | ||
4a744367 | 525 | ctx->session->streams[i].mmap_size = 0; |
fb6b45aa | 526 | ctx->session->streams[i].ctf_stream_id = -1ULL; |
4a744367 JD |
527 | |
528 | if (be32toh(stream.metadata_flag)) { | |
4a744367 | 529 | ctx->session->streams[i].metadata_flag = 1; |
4a744367 JD |
530 | } |
531 | ret = lttng_live_ctf_trace_assign(&ctx->session->streams[i], | |
532 | be64toh(stream.ctf_trace_id)); | |
533 | if (ret < 0) { | |
534 | goto error; | |
535 | } | |
536 | ||
537 | } | |
538 | ret = 0; | |
4a744367 | 539 | end: |
4a744367 | 540 | return ret; |
8ace20bf MD |
541 | |
542 | error: | |
543 | return -1; | |
4a744367 JD |
544 | } |
545 | ||
73b2b0d1 JD |
546 | /* |
547 | * Ask the relay for new streams. | |
548 | * | |
549 | * Returns the number of new streams received or a negative value on error. | |
550 | */ | |
2acdc547 JD |
551 | static |
552 | int ask_new_streams(struct lttng_live_ctx *ctx) | |
553 | { | |
73b2b0d1 | 554 | int i, ret = 0, nb_streams = 0; |
2acdc547 JD |
555 | uint64_t id; |
556 | ||
557 | restart: | |
558 | for (i = 0; i < ctx->session_ids->len; i++) { | |
559 | id = g_array_index(ctx->session_ids, uint64_t, i); | |
560 | ret = lttng_live_get_new_streams(ctx, id); | |
73b2b0d1 | 561 | printf_verbose("Asking for new streams returns %d\n", ret); |
2acdc547 | 562 | if (ret < 0) { |
e29395a8 JG |
563 | if (lttng_live_should_quit()) { |
564 | goto end; | |
565 | } | |
2acdc547 JD |
566 | if (ret == -LTTNG_VIEWER_NEW_STREAMS_HUP) { |
567 | printf_verbose("Session %" PRIu64 " closed\n", | |
568 | id); | |
b5a1fa45 JD |
569 | /* |
570 | * The streams have already been closed during | |
571 | * the reading, so we only need to get rid of | |
572 | * the trace in our internal table of sessions. | |
573 | */ | |
2acdc547 JD |
574 | g_array_remove_index(ctx->session_ids, i); |
575 | /* | |
576 | * We can't continue iterating on the g_array | |
577 | * after a remove, we have to start again. | |
578 | */ | |
579 | goto restart; | |
580 | } else { | |
581 | ret = -1; | |
582 | goto end; | |
583 | } | |
73b2b0d1 JD |
584 | } else { |
585 | nb_streams += ret; | |
2acdc547 JD |
586 | } |
587 | } | |
73b2b0d1 | 588 | ret = nb_streams; |
2acdc547 JD |
589 | |
590 | end: | |
591 | return ret; | |
592 | } | |
593 | ||
50d207af JD |
594 | static |
595 | int append_metadata(struct lttng_live_ctx *ctx, | |
596 | struct lttng_live_viewer_stream *viewer_stream) | |
597 | { | |
598 | int ret; | |
599 | struct lttng_live_viewer_stream *metadata; | |
600 | char *metadata_buf = NULL; | |
601 | ||
602 | printf_verbose("get_next_index: new metadata needed\n"); | |
603 | ret = get_new_metadata(ctx, viewer_stream, &metadata_buf); | |
604 | if (ret < 0) { | |
605 | free(metadata_buf); | |
606 | goto error; | |
607 | } | |
608 | ||
609 | metadata = viewer_stream->ctf_trace->metadata_stream; | |
610 | metadata->ctf_trace->metadata_fp = | |
611 | babeltrace_fmemopen(metadata_buf, | |
612 | metadata->metadata_len, "rb"); | |
613 | if (!metadata->ctf_trace->metadata_fp) { | |
614 | perror("Metadata fmemopen"); | |
615 | free(metadata_buf); | |
616 | ret = -1; | |
617 | goto error; | |
618 | } | |
619 | ret = ctf_append_trace_metadata( | |
620 | viewer_stream->ctf_trace->handle->td, | |
621 | metadata->ctf_trace->metadata_fp); | |
251fc08c MD |
622 | /* We accept empty metadata packets */ |
623 | if (ret != 0 && ret != -ENOENT) { | |
50d207af JD |
624 | fprintf(stderr, "[error] Appending metadata\n"); |
625 | goto error; | |
626 | } | |
251fc08c | 627 | ret = 0; |
50d207af JD |
628 | |
629 | error: | |
630 | return ret; | |
631 | } | |
632 | ||
4a744367 JD |
633 | static |
634 | int get_data_packet(struct lttng_live_ctx *ctx, | |
635 | struct ctf_stream_pos *pos, | |
636 | struct lttng_live_viewer_stream *stream, uint64_t offset, | |
637 | uint64_t len) | |
638 | { | |
639 | struct lttng_viewer_cmd cmd; | |
640 | struct lttng_viewer_get_packet rq; | |
641 | struct lttng_viewer_trace_packet rp; | |
642 | ssize_t ret_len; | |
643 | int ret; | |
644 | ||
50d207af | 645 | retry: |
8ace20bf MD |
646 | if (lttng_live_should_quit()) { |
647 | ret = -1; | |
648 | goto end; | |
649 | } | |
4a744367 JD |
650 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_PACKET); |
651 | cmd.data_size = sizeof(rq); | |
652 | cmd.cmd_version = 0; | |
653 | ||
654 | memset(&rq, 0, sizeof(rq)); | |
655 | rq.stream_id = htobe64(stream->id); | |
c1e8ac81 | 656 | rq.offset = htobe64(offset); |
4a744367 JD |
657 | rq.len = htobe32(len); |
658 | ||
b7e8a8e1 | 659 | ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd)); |
4a744367 | 660 | if (ret_len < 0) { |
79620497 | 661 | perror("[error] Error sending cmd"); |
4a744367 JD |
662 | goto error; |
663 | } | |
664 | assert(ret_len == sizeof(cmd)); | |
665 | ||
b7e8a8e1 | 666 | ret_len = lttng_live_send(ctx->control_sock, &rq, sizeof(rq)); |
4a744367 | 667 | if (ret_len < 0) { |
79620497 | 668 | perror("[error] Error sending get_data_packet request"); |
4a744367 JD |
669 | goto error; |
670 | } | |
671 | assert(ret_len == sizeof(rq)); | |
672 | ||
b7e8a8e1 | 673 | ret_len = lttng_live_recv(ctx->control_sock, &rp, sizeof(rp)); |
f8612f31 MD |
674 | if (ret_len == 0) { |
675 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
676 | goto error; |
677 | } | |
4a744367 | 678 | if (ret_len < 0) { |
79620497 | 679 | perror("[error] Error receiving data response"); |
4a744367 JD |
680 | goto error; |
681 | } | |
57b9d843 JD |
682 | if (ret_len != sizeof(rp)) { |
683 | fprintf(stderr, "[error] get_data_packet: expected %" PRId64 | |
a5e4b11e MD |
684 | ", received %" PRId64 "\n", sizeof(rp), |
685 | ret_len); | |
57b9d843 JD |
686 | goto error; |
687 | } | |
4a744367 JD |
688 | |
689 | rp.flags = be32toh(rp.flags); | |
690 | ||
691 | switch (be32toh(rp.status)) { | |
692 | case LTTNG_VIEWER_GET_PACKET_OK: | |
693 | len = be32toh(rp.len); | |
694 | printf_verbose("get_data_packet: Ok, packet size : %" PRIu64 | |
695 | "\n", len); | |
696 | break; | |
697 | case LTTNG_VIEWER_GET_PACKET_RETRY: | |
8ace20bf | 698 | /* Unimplemented by relay daemon */ |
4a744367 | 699 | printf_verbose("get_data_packet: retry\n"); |
8ace20bf | 700 | goto error; |
4a744367 JD |
701 | case LTTNG_VIEWER_GET_PACKET_ERR: |
702 | if (rp.flags & LTTNG_VIEWER_FLAG_NEW_METADATA) { | |
703 | printf_verbose("get_data_packet: new metadata needed\n"); | |
50d207af JD |
704 | ret = append_metadata(ctx, stream); |
705 | if (ret) | |
706 | goto error; | |
4a744367 | 707 | } |
2acdc547 | 708 | if (rp.flags & LTTNG_VIEWER_FLAG_NEW_STREAM) { |
f312b3aa | 709 | printf_verbose("get_data_packet: new streams needed\n"); |
2acdc547 JD |
710 | ret = ask_new_streams(ctx); |
711 | if (ret < 0) | |
712 | goto error; | |
73b2b0d1 JD |
713 | else if (ret > 0) |
714 | g_hash_table_foreach(ctx->session->ctf_traces, | |
715 | add_traces, ctx->bt_ctx); | |
2acdc547 | 716 | } |
f312b3aa MD |
717 | if (rp.flags & (LTTNG_VIEWER_FLAG_NEW_METADATA |
718 | | LTTNG_VIEWER_FLAG_NEW_STREAM)) { | |
719 | goto retry; | |
720 | } | |
4a744367 | 721 | fprintf(stderr, "[error] get_data_packet: error\n"); |
8ace20bf | 722 | goto error; |
4a744367 JD |
723 | case LTTNG_VIEWER_GET_PACKET_EOF: |
724 | ret = -2; | |
8ace20bf | 725 | goto end; |
4a744367 JD |
726 | default: |
727 | printf_verbose("get_data_packet: unknown\n"); | |
8ace20bf | 728 | goto error; |
4a744367 JD |
729 | } |
730 | ||
65ae9a82 | 731 | if (len == 0) { |
96943040 | 732 | goto error; |
4a744367 JD |
733 | } |
734 | ||
735 | if (len > stream->mmap_size) { | |
736 | uint64_t new_size; | |
737 | ||
738 | new_size = max_t(uint64_t, len, stream->mmap_size << 1); | |
739 | if (pos->base_mma) { | |
740 | /* unmap old base */ | |
741 | ret = munmap_align(pos->base_mma); | |
742 | if (ret) { | |
79620497 | 743 | perror("[error] Unable to unmap old base"); |
4a744367 JD |
744 | goto error; |
745 | } | |
746 | pos->base_mma = NULL; | |
747 | } | |
748 | pos->base_mma = mmap_align(new_size, | |
749 | PROT_READ | PROT_WRITE, | |
750 | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); | |
751 | if (pos->base_mma == MAP_FAILED) { | |
79620497 | 752 | perror("[error] mmap error"); |
4a744367 | 753 | pos->base_mma = NULL; |
4a744367 JD |
754 | goto error; |
755 | } | |
756 | ||
757 | stream->mmap_size = new_size; | |
758 | printf_verbose("Expanding stream mmap size to %" PRIu64 " bytes\n", | |
759 | stream->mmap_size); | |
760 | } | |
761 | ||
b7e8a8e1 MD |
762 | ret_len = lttng_live_recv(ctx->control_sock, |
763 | mmap_align_addr(pos->base_mma), len); | |
f8612f31 MD |
764 | if (ret_len == 0) { |
765 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
766 | goto error; |
767 | } | |
4a744367 | 768 | if (ret_len < 0) { |
79620497 | 769 | perror("[error] Error receiving trace packet"); |
4a744367 JD |
770 | goto error; |
771 | } | |
772 | assert(ret_len == len); | |
f312b3aa | 773 | ret = 0; |
4a744367 | 774 | end: |
4a744367 | 775 | return ret; |
8ace20bf MD |
776 | |
777 | error: | |
778 | return -1; | |
4a744367 JD |
779 | } |
780 | ||
4a744367 | 781 | static |
9abca178 JD |
782 | int get_one_metadata_packet(struct lttng_live_ctx *ctx, |
783 | struct lttng_live_viewer_stream *metadata_stream) | |
4a744367 JD |
784 | { |
785 | uint64_t len = 0; | |
786 | int ret; | |
787 | struct lttng_viewer_cmd cmd; | |
788 | struct lttng_viewer_get_metadata rq; | |
789 | struct lttng_viewer_metadata_packet rp; | |
4a744367 JD |
790 | char *data = NULL; |
791 | ssize_t ret_len; | |
792 | ||
8ace20bf MD |
793 | if (lttng_live_should_quit()) { |
794 | ret = -1; | |
795 | goto end; | |
796 | } | |
797 | ||
9abca178 | 798 | rq.stream_id = htobe64(metadata_stream->id); |
4a744367 JD |
799 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_METADATA); |
800 | cmd.data_size = sizeof(rq); | |
801 | cmd.cmd_version = 0; | |
802 | ||
b7e8a8e1 | 803 | ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd)); |
4a744367 | 804 | if (ret_len < 0) { |
79620497 | 805 | perror("[error] Error sending cmd"); |
4a744367 JD |
806 | goto error; |
807 | } | |
808 | assert(ret_len == sizeof(cmd)); | |
809 | ||
b7e8a8e1 | 810 | ret_len = lttng_live_send(ctx->control_sock, &rq, sizeof(rq)); |
4a744367 | 811 | if (ret_len < 0) { |
79620497 | 812 | perror("[error] Error sending get_metadata request"); |
4a744367 JD |
813 | goto error; |
814 | } | |
815 | assert(ret_len == sizeof(rq)); | |
816 | ||
b7e8a8e1 | 817 | ret_len = lttng_live_recv(ctx->control_sock, &rp, sizeof(rp)); |
f8612f31 MD |
818 | if (ret_len == 0) { |
819 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
820 | goto error; |
821 | } | |
4a744367 | 822 | if (ret_len < 0) { |
79620497 | 823 | perror("[error] Error receiving metadata response"); |
4a744367 JD |
824 | goto error; |
825 | } | |
826 | assert(ret_len == sizeof(rp)); | |
827 | ||
828 | switch (be32toh(rp.status)) { | |
829 | case LTTNG_VIEWER_METADATA_OK: | |
830 | printf_verbose("get_metadata : OK\n"); | |
831 | break; | |
832 | case LTTNG_VIEWER_NO_NEW_METADATA: | |
833 | printf_verbose("get_metadata : NO NEW\n"); | |
9abca178 | 834 | ret = 0; |
4a744367 JD |
835 | goto end; |
836 | case LTTNG_VIEWER_METADATA_ERR: | |
837 | printf_verbose("get_metadata : ERR\n"); | |
8ace20bf | 838 | goto error; |
4a744367 JD |
839 | default: |
840 | printf_verbose("get_metadata : UNKNOWN\n"); | |
8ace20bf | 841 | goto error; |
4a744367 JD |
842 | } |
843 | ||
844 | len = be64toh(rp.len); | |
845 | printf_verbose("Writing %" PRIu64" bytes to metadata\n", len); | |
846 | if (len <= 0) { | |
8ace20bf | 847 | goto error; |
4a744367 JD |
848 | } |
849 | ||
850 | data = zmalloc(len); | |
851 | if (!data) { | |
852 | perror("relay data zmalloc"); | |
4a744367 JD |
853 | goto error; |
854 | } | |
b7e8a8e1 | 855 | ret_len = lttng_live_recv(ctx->control_sock, data, len); |
f8612f31 MD |
856 | if (ret_len == 0) { |
857 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
8ace20bf | 858 | goto error_free_data; |
f8612f31 | 859 | } |
4a744367 | 860 | if (ret_len < 0) { |
79620497 | 861 | perror("[error] Error receiving trace packet"); |
8ace20bf | 862 | goto error_free_data; |
4a744367 JD |
863 | } |
864 | assert(ret_len == len); | |
865 | ||
866 | do { | |
af701dc4 JD |
867 | ret_len = fwrite(data, 1, len, |
868 | metadata_stream->metadata_fp_write); | |
4a744367 JD |
869 | } while (ret_len < 0 && errno == EINTR); |
870 | if (ret_len < 0) { | |
af701dc4 | 871 | fprintf(stderr, "[error] Writing in the metadata fp\n"); |
8ace20bf | 872 | goto error_free_data; |
4a744367 JD |
873 | } |
874 | assert(ret_len == len); | |
af701dc4 | 875 | metadata_stream->metadata_len += len; |
8ace20bf | 876 | free(data); |
9abca178 | 877 | ret = len; |
8ace20bf MD |
878 | end: |
879 | return ret; | |
4a744367 | 880 | |
8ace20bf | 881 | error_free_data: |
4a744367 | 882 | free(data); |
4a744367 | 883 | error: |
8ace20bf | 884 | return -1; |
4a744367 JD |
885 | } |
886 | ||
9abca178 JD |
887 | /* |
888 | * Return 0 on success, a negative value on error. | |
889 | */ | |
890 | static | |
891 | int get_new_metadata(struct lttng_live_ctx *ctx, | |
af701dc4 JD |
892 | struct lttng_live_viewer_stream *viewer_stream, |
893 | char **metadata_buf) | |
9abca178 JD |
894 | { |
895 | int ret = 0; | |
896 | struct lttng_live_viewer_stream *metadata_stream; | |
73b2b0d1 | 897 | size_t size, len_read = 0; |
9abca178 JD |
898 | |
899 | metadata_stream = viewer_stream->ctf_trace->metadata_stream; | |
50d207af JD |
900 | if (!metadata_stream) { |
901 | fprintf(stderr, "[error] No metadata stream\n"); | |
902 | ret = -1; | |
903 | goto error; | |
904 | } | |
af701dc4 JD |
905 | metadata_stream->metadata_len = 0; |
906 | ret = open_metadata_fp_write(metadata_stream, metadata_buf, &size); | |
907 | if (ret < 0) { | |
908 | goto error; | |
909 | } | |
9abca178 JD |
910 | |
911 | do { | |
912 | /* | |
913 | * get_one_metadata_packet returns the number of bytes | |
914 | * received, 0 when we have received everything, a | |
915 | * negative value on error. | |
916 | */ | |
917 | ret = get_one_metadata_packet(ctx, metadata_stream); | |
c111d5d7 MD |
918 | if (ret > 0) { |
919 | len_read += ret; | |
920 | } | |
85e2085e MD |
921 | if (!len_read) { |
922 | (void) poll(NULL, 0, ACTIVE_POLL_DELAY); | |
923 | } | |
c111d5d7 | 924 | } while (ret > 0 || !len_read); |
9abca178 | 925 | |
7def295f MD |
926 | if (fclose(metadata_stream->metadata_fp_write)) |
927 | perror("fclose"); | |
af701dc4 JD |
928 | metadata_stream->metadata_fp_write = NULL; |
929 | ||
930 | error: | |
9abca178 JD |
931 | return ret; |
932 | } | |
933 | ||
fb6b45aa JD |
934 | /* |
935 | * Assign the fields from a lttng_viewer_index to a packet_index. | |
936 | */ | |
937 | static | |
938 | void lttng_index_to_packet_index(struct lttng_viewer_index *lindex, | |
939 | struct packet_index *pindex) | |
940 | { | |
941 | assert(lindex); | |
942 | assert(pindex); | |
943 | ||
944 | pindex->offset = be64toh(lindex->offset); | |
945 | pindex->packet_size = be64toh(lindex->packet_size); | |
946 | pindex->content_size = be64toh(lindex->content_size); | |
947 | pindex->ts_cycles.timestamp_begin = be64toh(lindex->timestamp_begin); | |
948 | pindex->ts_cycles.timestamp_end = be64toh(lindex->timestamp_end); | |
949 | pindex->events_discarded = be64toh(lindex->events_discarded); | |
950 | } | |
951 | ||
4a744367 JD |
952 | /* |
953 | * Get one index for a stream. | |
954 | * | |
955 | * Returns 0 on success or a negative value on error. | |
956 | */ | |
957 | static | |
958 | int get_next_index(struct lttng_live_ctx *ctx, | |
959 | struct lttng_live_viewer_stream *viewer_stream, | |
fb6b45aa | 960 | struct packet_index *index, uint64_t *stream_id) |
4a744367 JD |
961 | { |
962 | struct lttng_viewer_cmd cmd; | |
963 | struct lttng_viewer_get_next_index rq; | |
4a744367 | 964 | int ret; |
4a744367 | 965 | ssize_t ret_len; |
fb6b45aa | 966 | struct lttng_viewer_index *rp = &viewer_stream->current_index; |
4a744367 JD |
967 | |
968 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_NEXT_INDEX); | |
969 | cmd.data_size = sizeof(rq); | |
970 | cmd.cmd_version = 0; | |
971 | ||
972 | memset(&rq, 0, sizeof(rq)); | |
973 | rq.stream_id = htobe64(viewer_stream->id); | |
974 | ||
975 | retry: | |
8ace20bf MD |
976 | if (lttng_live_should_quit()) { |
977 | ret = -1; | |
978 | goto end; | |
979 | } | |
b7e8a8e1 | 980 | ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd)); |
4a744367 | 981 | if (ret_len < 0) { |
79620497 | 982 | perror("[error] Error sending cmd"); |
4a744367 JD |
983 | goto error; |
984 | } | |
985 | assert(ret_len == sizeof(cmd)); | |
986 | ||
b7e8a8e1 | 987 | ret_len = lttng_live_send(ctx->control_sock, &rq, sizeof(rq)); |
4a744367 | 988 | if (ret_len < 0) { |
79620497 | 989 | perror("[error] Error sending get_next_index request"); |
4a744367 JD |
990 | goto error; |
991 | } | |
992 | assert(ret_len == sizeof(rq)); | |
993 | ||
fb6b45aa | 994 | ret_len = lttng_live_recv(ctx->control_sock, rp, sizeof(*rp)); |
f8612f31 MD |
995 | if (ret_len == 0) { |
996 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
997 | goto error; |
998 | } | |
4a744367 | 999 | if (ret_len < 0) { |
79620497 | 1000 | perror("[error] Error receiving index response"); |
4a744367 JD |
1001 | goto error; |
1002 | } | |
fb6b45aa | 1003 | assert(ret_len == sizeof(*rp)); |
4a744367 | 1004 | |
fb6b45aa | 1005 | rp->flags = be32toh(rp->flags); |
4a744367 | 1006 | |
fb6b45aa | 1007 | switch (be32toh(rp->status)) { |
4a744367 JD |
1008 | case LTTNG_VIEWER_INDEX_INACTIVE: |
1009 | printf_verbose("get_next_index: inactive\n"); | |
1010 | memset(index, 0, sizeof(struct packet_index)); | |
fb6b45aa JD |
1011 | index->ts_cycles.timestamp_end = be64toh(rp->timestamp_end); |
1012 | *stream_id = be64toh(rp->stream_id); | |
4a744367 JD |
1013 | break; |
1014 | case LTTNG_VIEWER_INDEX_OK: | |
1015 | printf_verbose("get_next_index: Ok, need metadata update : %u\n", | |
fb6b45aa JD |
1016 | rp->flags & LTTNG_VIEWER_FLAG_NEW_METADATA); |
1017 | lttng_index_to_packet_index(rp, index); | |
1018 | *stream_id = be64toh(rp->stream_id); | |
1019 | viewer_stream->data_pending = 1; | |
4a744367 | 1020 | |
fb6b45aa | 1021 | if (rp->flags & LTTNG_VIEWER_FLAG_NEW_METADATA) { |
50d207af JD |
1022 | ret = append_metadata(ctx, viewer_stream); |
1023 | if (ret) | |
4a744367 | 1024 | goto error; |
4a744367 | 1025 | } |
fb6b45aa | 1026 | if (rp->flags & LTTNG_VIEWER_FLAG_NEW_STREAM) { |
73b2b0d1 | 1027 | printf_verbose("get_next_index: need new streams\n"); |
2acdc547 JD |
1028 | ret = ask_new_streams(ctx); |
1029 | if (ret < 0) | |
1030 | goto error; | |
73b2b0d1 JD |
1031 | else if (ret > 0) |
1032 | g_hash_table_foreach(ctx->session->ctf_traces, | |
1033 | add_traces, ctx->bt_ctx); | |
2acdc547 | 1034 | } |
4a744367 JD |
1035 | break; |
1036 | case LTTNG_VIEWER_INDEX_RETRY: | |
1037 | printf_verbose("get_next_index: retry\n"); | |
85e2085e | 1038 | (void) poll(NULL, 0, ACTIVE_POLL_DELAY); |
4a744367 JD |
1039 | goto retry; |
1040 | case LTTNG_VIEWER_INDEX_HUP: | |
1041 | printf_verbose("get_next_index: stream hung up\n"); | |
1042 | viewer_stream->id = -1ULL; | |
4a744367 | 1043 | index->offset = EOF; |
2acdc547 | 1044 | ctx->session->stream_count--; |
4a744367 JD |
1045 | break; |
1046 | case LTTNG_VIEWER_INDEX_ERR: | |
1047 | fprintf(stderr, "[error] get_next_index: error\n"); | |
4a744367 JD |
1048 | goto error; |
1049 | default: | |
1050 | fprintf(stderr, "[error] get_next_index: unkwown value\n"); | |
4a744367 JD |
1051 | goto error; |
1052 | } | |
4a744367 | 1053 | ret = 0; |
8ace20bf MD |
1054 | end: |
1055 | return ret; | |
4a744367 JD |
1056 | |
1057 | error: | |
8ace20bf | 1058 | return -1; |
4a744367 JD |
1059 | } |
1060 | ||
fb6b45aa JD |
1061 | static |
1062 | void read_packet_header(struct ctf_stream_pos *pos, | |
1063 | struct ctf_file_stream *file_stream) | |
1064 | { | |
1065 | int ret; | |
1066 | ||
1067 | /* update trace_packet_header and stream_packet_context */ | |
1068 | if (pos->prot != PROT_WRITE && file_stream->parent.trace_packet_header) { | |
1069 | /* Read packet header */ | |
1070 | ret = generic_rw(&pos->parent, | |
1071 | &file_stream->parent.trace_packet_header->p); | |
1072 | if (ret) { | |
1073 | pos->offset = EOF; | |
1074 | fprintf(stderr, "[error] trace packet " | |
1075 | "header read failed\n"); | |
1076 | goto end; | |
1077 | } | |
1078 | } | |
1079 | if (pos->prot != PROT_WRITE && file_stream->parent.stream_packet_context) { | |
1080 | /* Read packet context */ | |
1081 | ret = generic_rw(&pos->parent, | |
1082 | &file_stream->parent.stream_packet_context->p); | |
1083 | if (ret) { | |
1084 | pos->offset = EOF; | |
1085 | fprintf(stderr, "[error] stream packet " | |
1086 | "context read failed\n"); | |
1087 | goto end; | |
1088 | } | |
1089 | } | |
1090 | pos->data_offset = pos->offset; | |
1091 | ||
1092 | end: | |
1093 | return; | |
1094 | } | |
1095 | ||
1096 | /* | |
1097 | * Handle the seek parameters. | |
1098 | * Returns 0 if the packet_seek can continue, a positive value to | |
1099 | * cleanly exit the packet_seek, a negative value on error. | |
1100 | */ | |
1101 | static | |
1102 | int handle_seek_position(size_t index, int whence, | |
1103 | struct lttng_live_viewer_stream *viewer_stream, | |
1104 | struct ctf_stream_pos *pos, | |
1105 | struct ctf_file_stream *file_stream) | |
1106 | { | |
1107 | int ret; | |
1108 | ||
1109 | switch (whence) { | |
1110 | case SEEK_CUR: | |
1111 | ret = 0; | |
1112 | goto end; | |
1113 | case SEEK_SET: | |
1114 | /* | |
1115 | * We only allow to seek to 0. | |
1116 | */ | |
1117 | if (index != 0) { | |
1118 | fprintf(stderr, "[error] Arbitrary seek in lttng-live " | |
1119 | "trace not supported\n"); | |
1120 | pos->offset = EOF; | |
1121 | ret = -1; | |
1122 | goto end; | |
1123 | } | |
1124 | ||
1125 | ret = 0; | |
1126 | goto end; | |
1127 | ||
1128 | default: | |
1129 | fprintf(stderr, "[error] Invalid seek parameter\n"); | |
1130 | assert(0); | |
1131 | } | |
1132 | ||
1133 | end: | |
1134 | return ret; | |
1135 | } | |
1136 | ||
b5a1fa45 | 1137 | static |
4a744367 JD |
1138 | void ctf_live_packet_seek(struct bt_stream_pos *stream_pos, size_t index, |
1139 | int whence) | |
1140 | { | |
1141 | struct ctf_stream_pos *pos; | |
1142 | struct ctf_file_stream *file_stream; | |
f1f52630 | 1143 | struct packet_index *prev_index = NULL, *cur_index; |
4a744367 JD |
1144 | struct lttng_live_viewer_stream *viewer_stream; |
1145 | struct lttng_live_session *session; | |
fb6b45aa | 1146 | uint64_t stream_id = -1ULL; |
4a744367 JD |
1147 | int ret; |
1148 | ||
4a744367 JD |
1149 | pos = ctf_pos(stream_pos); |
1150 | file_stream = container_of(pos, struct ctf_file_stream, pos); | |
1151 | viewer_stream = (struct lttng_live_viewer_stream *) pos->priv; | |
1152 | session = viewer_stream->session; | |
1153 | ||
fb6b45aa JD |
1154 | ret = handle_seek_position(index, whence, viewer_stream, pos, |
1155 | file_stream); | |
1156 | if (ret != 0) { | |
1157 | return; | |
1158 | } | |
1159 | ||
1160 | retry: | |
f1f52630 MD |
1161 | switch (pos->packet_index->len) { |
1162 | case 0: | |
1163 | g_array_set_size(pos->packet_index, 1); | |
1164 | cur_index = &g_array_index(pos->packet_index, | |
1165 | struct packet_index, 0); | |
1166 | break; | |
1167 | case 1: | |
1168 | g_array_set_size(pos->packet_index, 2); | |
1169 | prev_index = &g_array_index(pos->packet_index, | |
1170 | struct packet_index, 0); | |
1171 | cur_index = &g_array_index(pos->packet_index, | |
1172 | struct packet_index, 1); | |
1173 | break; | |
1174 | case 2: | |
1175 | g_array_index(pos->packet_index, | |
1176 | struct packet_index, 0) = | |
1177 | g_array_index(pos->packet_index, | |
1178 | struct packet_index, 1); | |
1179 | prev_index = &g_array_index(pos->packet_index, | |
1180 | struct packet_index, 0); | |
1181 | cur_index = &g_array_index(pos->packet_index, | |
1182 | struct packet_index, 1); | |
1183 | break; | |
1184 | default: | |
1185 | abort(); | |
1186 | break; | |
1187 | } | |
fb6b45aa JD |
1188 | |
1189 | if (viewer_stream->data_pending) { | |
1190 | lttng_index_to_packet_index(&viewer_stream->current_index, cur_index); | |
1191 | } else { | |
1192 | printf_verbose("get_next_index for stream %" PRIu64 "\n", viewer_stream->id); | |
1193 | ret = get_next_index(session->ctx, viewer_stream, cur_index, &stream_id); | |
1194 | if (ret < 0) { | |
1195 | pos->offset = EOF; | |
1196 | if (!lttng_live_should_quit()) { | |
1197 | fprintf(stderr, "[error] get_next_index failed\n"); | |
1198 | } | |
1199 | return; | |
e29395a8 | 1200 | } |
fb6b45aa JD |
1201 | printf_verbose("Index received : packet_size : %" PRIu64 |
1202 | ", offset %" PRIu64 ", content_size %" PRIu64 | |
1203 | ", timestamp_end : %" PRIu64 "\n", | |
1204 | cur_index->packet_size, cur_index->offset, | |
1205 | cur_index->content_size, | |
1206 | cur_index->ts_cycles.timestamp_end); | |
1207 | ||
1208 | } | |
1209 | ||
1210 | /* | |
1211 | * On the first time we receive an index, the stream_id needs to | |
1212 | * be set for the stream in order to use it, we don't want any | |
1213 | * data at this stage. | |
1214 | */ | |
1215 | if (file_stream->parent.stream_id == -1ULL) { | |
1216 | /* | |
1217 | * Warning: with lttng-tools < 2.4.2, the beacon does not | |
1218 | * contain the real stream ID, it is memset to 0, so this | |
1219 | * might create a problem when a session has multiple | |
1220 | * channels. We can't detect it at this stage, lttng-tools | |
1221 | * has to be upgraded to fix this problem. | |
1222 | */ | |
1223 | printf_verbose("Assigning stream_id %" PRIu64 "\n", | |
1224 | stream_id); | |
1225 | file_stream->parent.stream_id = stream_id; | |
1226 | viewer_stream->ctf_stream_id = stream_id; | |
1227 | ||
4a744367 JD |
1228 | return; |
1229 | } | |
1230 | ||
f1f52630 MD |
1231 | pos->packet_size = cur_index->packet_size; |
1232 | pos->content_size = cur_index->content_size; | |
4a744367 | 1233 | pos->mmap_base_offset = 0; |
f1f52630 | 1234 | if (cur_index->offset == EOF) { |
4a744367 JD |
1235 | pos->offset = EOF; |
1236 | } else { | |
1237 | pos->offset = 0; | |
1238 | } | |
1239 | ||
f1f52630 | 1240 | if (cur_index->content_size == 0) { |
fb6b45aa JD |
1241 | if (file_stream->parent.stream_class) { |
1242 | file_stream->parent.cycles_timestamp = | |
f1f52630 | 1243 | cur_index->ts_cycles.timestamp_end; |
fb6b45aa JD |
1244 | file_stream->parent.real_timestamp = ctf_get_real_timestamp( |
1245 | &file_stream->parent, | |
1246 | cur_index->ts_cycles.timestamp_end); | |
1247 | } | |
4a744367 | 1248 | } else { |
fb6b45aa JD |
1249 | if (file_stream->parent.stream_class) { |
1250 | /* Convert the timestamps and append to the real_index. */ | |
1251 | cur_index->ts_real.timestamp_begin = ctf_get_real_timestamp( | |
1252 | &file_stream->parent, | |
1253 | cur_index->ts_cycles.timestamp_begin); | |
1254 | cur_index->ts_real.timestamp_end = ctf_get_real_timestamp( | |
1255 | &file_stream->parent, | |
1256 | cur_index->ts_cycles.timestamp_end); | |
1257 | } | |
f1f52630 MD |
1258 | |
1259 | ctf_update_current_packet_index(&file_stream->parent, | |
1260 | prev_index, cur_index); | |
1261 | ||
1262 | file_stream->parent.cycles_timestamp = | |
1263 | cur_index->ts_cycles.timestamp_begin; | |
1264 | file_stream->parent.real_timestamp = | |
1265 | cur_index->ts_real.timestamp_begin; | |
4a744367 JD |
1266 | } |
1267 | ||
1268 | if (pos->packet_size == 0 || pos->offset == EOF) { | |
1269 | goto end; | |
1270 | } | |
1271 | ||
1272 | printf_verbose("get_data_packet for stream %" PRIu64 "\n", | |
1273 | viewer_stream->id); | |
1274 | ret = get_data_packet(session->ctx, pos, viewer_stream, | |
c1e8ac81 | 1275 | cur_index->offset, |
f1f52630 | 1276 | cur_index->packet_size / CHAR_BIT); |
4a744367 JD |
1277 | if (ret == -2) { |
1278 | goto retry; | |
1279 | } else if (ret < 0) { | |
1280 | pos->offset = EOF; | |
e29395a8 JG |
1281 | if (!lttng_live_should_quit()) { |
1282 | fprintf(stderr, "[error] get_data_packet failed\n"); | |
1283 | } | |
4a744367 JD |
1284 | return; |
1285 | } | |
fb6b45aa | 1286 | viewer_stream->data_pending = 0; |
4a744367 | 1287 | |
fb6b45aa | 1288 | read_packet_header(pos, file_stream); |
4a744367 JD |
1289 | |
1290 | end: | |
1291 | return; | |
1292 | } | |
1293 | ||
2acdc547 JD |
1294 | int lttng_live_create_viewer_session(struct lttng_live_ctx *ctx) |
1295 | { | |
1296 | struct lttng_viewer_cmd cmd; | |
1297 | struct lttng_viewer_create_session_response resp; | |
1298 | int ret; | |
1299 | ssize_t ret_len; | |
1300 | ||
8ace20bf MD |
1301 | if (lttng_live_should_quit()) { |
1302 | ret = -1; | |
1303 | goto end; | |
1304 | } | |
1305 | ||
2acdc547 JD |
1306 | cmd.cmd = htobe32(LTTNG_VIEWER_CREATE_SESSION); |
1307 | cmd.data_size = 0; | |
1308 | cmd.cmd_version = 0; | |
1309 | ||
b7e8a8e1 | 1310 | ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd)); |
2acdc547 | 1311 | if (ret_len < 0) { |
79620497 | 1312 | perror("[error] Error sending cmd"); |
2acdc547 JD |
1313 | goto error; |
1314 | } | |
1315 | assert(ret_len == sizeof(cmd)); | |
1316 | ||
b7e8a8e1 | 1317 | ret_len = lttng_live_recv(ctx->control_sock, &resp, sizeof(resp)); |
f8612f31 MD |
1318 | if (ret_len == 0) { |
1319 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
1320 | goto error; |
1321 | } | |
2acdc547 | 1322 | if (ret_len < 0) { |
79620497 | 1323 | perror("[error] Error receiving create session reply"); |
2acdc547 JD |
1324 | goto error; |
1325 | } | |
1326 | assert(ret_len == sizeof(resp)); | |
1327 | ||
1328 | if (be32toh(resp.status) != LTTNG_VIEWER_CREATE_SESSION_OK) { | |
1329 | fprintf(stderr, "[error] Error creating viewer session\n"); | |
2acdc547 JD |
1330 | goto error; |
1331 | } | |
1332 | ret = 0; | |
8ace20bf MD |
1333 | end: |
1334 | return ret; | |
2acdc547 JD |
1335 | |
1336 | error: | |
8ace20bf | 1337 | return -1; |
2acdc547 JD |
1338 | } |
1339 | ||
1340 | static | |
1341 | int del_traces(gpointer key, gpointer value, gpointer user_data) | |
4a744367 JD |
1342 | { |
1343 | struct bt_context *bt_ctx = user_data; | |
1344 | struct lttng_live_ctf_trace *trace = value; | |
1345 | int ret; | |
1346 | ||
1347 | ret = bt_context_remove_trace(bt_ctx, trace->trace_id); | |
1348 | if (ret < 0) | |
1349 | fprintf(stderr, "[error] removing trace from context\n"); | |
1350 | ||
1351 | /* remove the key/value pair from the HT. */ | |
1352 | return 1; | |
1353 | } | |
1354 | ||
2acdc547 JD |
1355 | static |
1356 | void add_traces(gpointer key, gpointer value, gpointer user_data) | |
4a744367 | 1357 | { |
9abca178 | 1358 | int i, ret; |
4a744367 JD |
1359 | struct bt_context *bt_ctx = user_data; |
1360 | struct lttng_live_ctf_trace *trace = value; | |
1361 | struct lttng_live_viewer_stream *stream; | |
1362 | struct bt_mmap_stream *new_mmap_stream; | |
1363 | struct bt_mmap_stream_list mmap_list; | |
1364 | struct lttng_live_ctx *ctx = NULL; | |
150595c4 JD |
1365 | struct bt_trace_descriptor *td; |
1366 | struct bt_trace_handle *handle; | |
4a744367 | 1367 | |
b5a1fa45 JD |
1368 | /* |
1369 | * We don't know how many streams we will receive for a trace, so | |
1370 | * once we are done receiving the traces, we add all the traces | |
1371 | * received to the bt_context. | |
1372 | * We can receive streams during the attach command or the | |
1373 | * get_new_streams, so we have to make sure not to add multiple | |
1374 | * times the same traces. | |
1375 | * If a trace is already in the context, we just skip this function. | |
1376 | */ | |
2acdc547 JD |
1377 | if (trace->in_use) |
1378 | return; | |
1379 | ||
4a744367 JD |
1380 | BT_INIT_LIST_HEAD(&mmap_list.head); |
1381 | ||
1382 | for (i = 0; i < trace->streams->len; i++) { | |
1383 | stream = g_ptr_array_index(trace->streams, i); | |
1384 | ctx = stream->session->ctx; | |
1385 | ||
1386 | if (!stream->metadata_flag) { | |
1387 | new_mmap_stream = zmalloc(sizeof(struct bt_mmap_stream)); | |
1388 | new_mmap_stream->priv = (void *) stream; | |
1389 | new_mmap_stream->fd = -1; | |
1390 | bt_list_add(&new_mmap_stream->list, &mmap_list.head); | |
1391 | } else { | |
af701dc4 JD |
1392 | char *metadata_buf = NULL; |
1393 | ||
4a744367 | 1394 | /* Get all possible metadata before starting */ |
af701dc4 JD |
1395 | ret = get_new_metadata(ctx, stream, &metadata_buf); |
1396 | if (ret) { | |
1397 | free(metadata_buf); | |
1398 | goto end_free; | |
1399 | } | |
1400 | if (!stream->metadata_len) { | |
1401 | fprintf(stderr, "[error] empty metadata\n"); | |
1402 | ret = -1; | |
1403 | free(metadata_buf); | |
1404 | goto end_free; | |
1405 | } | |
1406 | ||
1407 | trace->metadata_fp = babeltrace_fmemopen(metadata_buf, | |
1408 | stream->metadata_len, "rb"); | |
1409 | if (!trace->metadata_fp) { | |
1410 | perror("Metadata fmemopen"); | |
1411 | ret = -1; | |
1412 | free(metadata_buf); | |
9abca178 | 1413 | goto end_free; |
af701dc4 | 1414 | } |
4a744367 JD |
1415 | } |
1416 | } | |
1417 | ||
1418 | if (!trace->metadata_fp) { | |
1419 | fprintf(stderr, "[error] No metadata stream opened\n"); | |
1420 | goto end_free; | |
1421 | } | |
1422 | ||
1423 | ret = bt_context_add_trace(bt_ctx, NULL, "ctf", | |
1424 | ctf_live_packet_seek, &mmap_list, trace->metadata_fp); | |
1425 | if (ret < 0) { | |
1426 | fprintf(stderr, "[error] Error adding trace\n"); | |
1427 | goto end_free; | |
1428 | } | |
af701dc4 JD |
1429 | trace->metadata_stream->metadata_len = 0; |
1430 | ||
150595c4 JD |
1431 | handle = (struct bt_trace_handle *) g_hash_table_lookup( |
1432 | bt_ctx->trace_handles, | |
1433 | (gpointer) (unsigned long) ret); | |
1434 | td = handle->td; | |
1435 | trace->handle = handle; | |
2acdc547 | 1436 | if (bt_ctx->current_iterator) { |
2acdc547 JD |
1437 | bt_iter_add_trace(bt_ctx->current_iterator, td); |
1438 | } | |
1439 | ||
4a744367 | 1440 | trace->trace_id = ret; |
2acdc547 | 1441 | trace->in_use = 1; |
4a744367 JD |
1442 | |
1443 | goto end; | |
1444 | ||
1445 | end_free: | |
1446 | bt_context_put(bt_ctx); | |
1447 | end: | |
1448 | return; | |
1449 | } | |
1450 | ||
73b2b0d1 JD |
1451 | /* |
1452 | * Request new streams for a session. | |
1453 | * Returns the number of streams received or a negative value on error. | |
1454 | */ | |
2acdc547 | 1455 | int lttng_live_get_new_streams(struct lttng_live_ctx *ctx, uint64_t id) |
6192b988 JD |
1456 | { |
1457 | struct lttng_viewer_cmd cmd; | |
2acdc547 JD |
1458 | struct lttng_viewer_new_streams_request rq; |
1459 | struct lttng_viewer_new_streams_response rp; | |
1460 | struct lttng_viewer_stream stream; | |
73b2b0d1 | 1461 | int ret, i, nb_streams = 0; |
6192b988 | 1462 | ssize_t ret_len; |
b5a1fa45 | 1463 | uint32_t stream_count; |
6192b988 | 1464 | |
8ace20bf MD |
1465 | if (lttng_live_should_quit()) { |
1466 | ret = -1; | |
1467 | goto end; | |
1468 | } | |
1469 | ||
2acdc547 JD |
1470 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_NEW_STREAMS); |
1471 | cmd.data_size = sizeof(rq); | |
6192b988 JD |
1472 | cmd.cmd_version = 0; |
1473 | ||
2acdc547 JD |
1474 | memset(&rq, 0, sizeof(rq)); |
1475 | rq.session_id = htobe64(id); | |
1476 | ||
b7e8a8e1 | 1477 | ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd)); |
6192b988 | 1478 | if (ret_len < 0) { |
79620497 | 1479 | perror("[error] Error sending cmd"); |
6192b988 JD |
1480 | goto error; |
1481 | } | |
1482 | assert(ret_len == sizeof(cmd)); | |
1483 | ||
b7e8a8e1 | 1484 | ret_len = lttng_live_send(ctx->control_sock, &rq, sizeof(rq)); |
6192b988 | 1485 | if (ret_len < 0) { |
79620497 | 1486 | perror("[error] Error sending get_new_streams request"); |
6192b988 JD |
1487 | goto error; |
1488 | } | |
2acdc547 | 1489 | assert(ret_len == sizeof(rq)); |
6192b988 | 1490 | |
b7e8a8e1 | 1491 | ret_len = lttng_live_recv(ctx->control_sock, &rp, sizeof(rp)); |
f8612f31 MD |
1492 | if (ret_len == 0) { |
1493 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
1494 | goto error; |
1495 | } | |
2acdc547 | 1496 | if (ret_len < 0) { |
79620497 | 1497 | perror("[error] Error receiving get_new_streams response"); |
6192b988 JD |
1498 | goto error; |
1499 | } | |
2acdc547 JD |
1500 | assert(ret_len == sizeof(rp)); |
1501 | ||
1502 | switch(be32toh(rp.status)) { | |
1503 | case LTTNG_VIEWER_NEW_STREAMS_OK: | |
1504 | break; | |
1505 | case LTTNG_VIEWER_NEW_STREAMS_NO_NEW: | |
1506 | ret = 0; | |
1507 | goto end; | |
1508 | case LTTNG_VIEWER_NEW_STREAMS_HUP: | |
1509 | ret = -LTTNG_VIEWER_NEW_STREAMS_HUP; | |
1510 | goto end; | |
1511 | case LTTNG_VIEWER_NEW_STREAMS_ERR: | |
1512 | fprintf(stderr, "[error] get_new_streams error\n"); | |
8ace20bf | 1513 | goto error; |
2acdc547 JD |
1514 | default: |
1515 | fprintf(stderr, "[error] Unknown return code %u\n", | |
1516 | be32toh(rp.status)); | |
8ace20bf | 1517 | goto error; |
2acdc547 JD |
1518 | } |
1519 | ||
b5a1fa45 JD |
1520 | stream_count = be32toh(rp.streams_count); |
1521 | ctx->session->stream_count += stream_count; | |
2acdc547 JD |
1522 | /* |
1523 | * When the session is created but not started, we do an active wait | |
1524 | * until it starts. It allows the viewer to start processing the trace | |
1525 | * as soon as the session starts. | |
1526 | */ | |
1527 | if (ctx->session->stream_count == 0) { | |
1528 | ret = 0; | |
1529 | goto end; | |
1530 | } | |
1531 | printf_verbose("Waiting for %" PRIu64 " streams:\n", | |
1532 | ctx->session->stream_count); | |
1533 | ctx->session->streams = g_new0(struct lttng_live_viewer_stream, | |
1534 | ctx->session->stream_count); | |
b5a1fa45 | 1535 | for (i = 0; i < stream_count; i++) { |
b7e8a8e1 | 1536 | ret_len = lttng_live_recv(ctx->control_sock, &stream, sizeof(stream)); |
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 stream"); |
2acdc547 JD |
1543 | goto error; |
1544 | } | |
1545 | assert(ret_len == sizeof(stream)); | |
1546 | stream.path_name[LTTNG_VIEWER_PATH_MAX - 1] = '\0'; | |
1547 | stream.channel_name[LTTNG_VIEWER_NAME_MAX - 1] = '\0'; | |
1548 | ||
1549 | printf_verbose(" stream %" PRIu64 " : %s/%s\n", | |
1550 | be64toh(stream.id), stream.path_name, | |
1551 | stream.channel_name); | |
1552 | ctx->session->streams[i].id = be64toh(stream.id); | |
1553 | ctx->session->streams[i].session = ctx->session; | |
1554 | ||
2acdc547 | 1555 | ctx->session->streams[i].mmap_size = 0; |
fb6b45aa | 1556 | ctx->session->streams[i].ctf_stream_id = -1ULL; |
2acdc547 JD |
1557 | |
1558 | if (be32toh(stream.metadata_flag)) { | |
2acdc547 | 1559 | ctx->session->streams[i].metadata_flag = 1; |
2acdc547 JD |
1560 | } |
1561 | ret = lttng_live_ctf_trace_assign(&ctx->session->streams[i], | |
1562 | be64toh(stream.ctf_trace_id)); | |
1563 | if (ret < 0) { | |
1564 | goto error; | |
1565 | } | |
73b2b0d1 | 1566 | nb_streams++; |
2acdc547 JD |
1567 | |
1568 | } | |
73b2b0d1 | 1569 | ret = nb_streams; |
2acdc547 | 1570 | end: |
6192b988 | 1571 | return ret; |
8ace20bf MD |
1572 | |
1573 | error: | |
1574 | return -1; | |
6192b988 JD |
1575 | } |
1576 | ||
28756729 | 1577 | int lttng_live_read(struct lttng_live_ctx *ctx) |
4a744367 | 1578 | { |
28756729 JG |
1579 | int ret = -1; |
1580 | int i; | |
4a744367 JD |
1581 | struct bt_ctf_iter *iter; |
1582 | const struct bt_ctf_event *event; | |
1583 | struct bt_iter_pos begin_pos; | |
1584 | struct bt_trace_descriptor *td_write; | |
1585 | struct bt_format *fmt_write; | |
1586 | struct ctf_text_stream_pos *sout; | |
2acdc547 | 1587 | uint64_t id; |
4a744367 | 1588 | |
2acdc547 JD |
1589 | ctx->bt_ctx = bt_context_create(); |
1590 | if (!ctx->bt_ctx) { | |
4a744367 JD |
1591 | fprintf(stderr, "[error] bt_context_create allocation\n"); |
1592 | goto end; | |
1593 | } | |
1594 | ||
1595 | fmt_write = bt_lookup_format(g_quark_from_static_string("text")); | |
1596 | if (!fmt_write) { | |
1597 | fprintf(stderr, "[error] ctf-text error\n"); | |
1598 | goto end; | |
1599 | } | |
1600 | ||
1601 | td_write = fmt_write->open_trace(NULL, O_RDWR, NULL, NULL); | |
1602 | if (!td_write) { | |
1603 | fprintf(stderr, "[error] Error opening output trace\n"); | |
1604 | goto end_free; | |
1605 | } | |
1606 | ||
1607 | sout = container_of(td_write, struct ctf_text_stream_pos, | |
1608 | trace_descriptor); | |
85bb4663 | 1609 | if (!sout->parent.event_cb) { |
4a744367 | 1610 | goto end_free; |
85bb4663 | 1611 | } |
4a744367 | 1612 | |
6192b988 JD |
1613 | ret = lttng_live_create_viewer_session(ctx); |
1614 | if (ret < 0) { | |
1615 | goto end_free; | |
1616 | } | |
1617 | ||
2acdc547 JD |
1618 | for (i = 0; i < ctx->session_ids->len; i++) { |
1619 | id = g_array_index(ctx->session_ids, uint64_t, i); | |
1620 | printf_verbose("Attaching to session %lu\n", id); | |
1621 | ret = lttng_live_attach_session(ctx, id); | |
1622 | printf_verbose("Attaching session returns %d\n", ret); | |
1623 | if (ret < 0) { | |
1624 | if (ret == -LTTNG_VIEWER_ATTACH_UNK) { | |
1625 | fprintf(stderr, "[error] Unknown session ID\n"); | |
1626 | } | |
1627 | goto end_free; | |
1628 | } | |
1629 | } | |
1630 | ||
4a744367 | 1631 | /* |
2acdc547 | 1632 | * As long as the session is active, we try to get new streams. |
4a744367 | 1633 | */ |
2acdc547 | 1634 | for (;;) { |
4a744367 JD |
1635 | int flags; |
1636 | ||
8ace20bf | 1637 | if (lttng_live_should_quit()) { |
28756729 | 1638 | ret = 0; |
8ace20bf MD |
1639 | goto end_free; |
1640 | } | |
1641 | ||
2acdc547 | 1642 | while (!ctx->session->stream_count) { |
8ace20bf MD |
1643 | if (lttng_live_should_quit() |
1644 | || ctx->session_ids->len == 0) { | |
28756729 | 1645 | ret = 0; |
4a744367 | 1646 | goto end_free; |
85bb4663 | 1647 | } |
2acdc547 | 1648 | ret = ask_new_streams(ctx); |
85bb4663 | 1649 | if (ret < 0) { |
2acdc547 | 1650 | goto end_free; |
85bb4663 MD |
1651 | } |
1652 | if (!ctx->session->stream_count) { | |
85e2085e | 1653 | (void) poll(NULL, 0, ACTIVE_POLL_DELAY); |
85bb4663 | 1654 | } |
2acdc547 | 1655 | } |
4a744367 | 1656 | |
2acdc547 JD |
1657 | g_hash_table_foreach(ctx->session->ctf_traces, add_traces, |
1658 | ctx->bt_ctx); | |
4a744367 JD |
1659 | |
1660 | begin_pos.type = BT_SEEK_BEGIN; | |
2acdc547 | 1661 | iter = bt_ctf_iter_create(ctx->bt_ctx, &begin_pos, NULL); |
4a744367 | 1662 | if (!iter) { |
e29395a8 JG |
1663 | if (lttng_live_should_quit()) { |
1664 | ret = 0; | |
1665 | goto end; | |
1666 | } | |
4a744367 JD |
1667 | fprintf(stderr, "[error] Iterator creation error\n"); |
1668 | goto end; | |
1669 | } | |
1670 | for (;;) { | |
8ace20bf | 1671 | if (lttng_live_should_quit()) { |
28756729 | 1672 | ret = 0; |
8ace20bf MD |
1673 | goto end_free; |
1674 | } | |
4a744367 JD |
1675 | event = bt_ctf_iter_read_event_flags(iter, &flags); |
1676 | if (!(flags & BT_ITER_FLAG_RETRY)) { | |
1677 | if (!event) { | |
1678 | /* End of trace */ | |
1679 | break; | |
1680 | } | |
1681 | ret = sout->parent.event_cb(&sout->parent, | |
1682 | event->parent->stream); | |
1683 | if (ret) { | |
1684 | fprintf(stderr, "[error] Writing " | |
1685 | "event failed.\n"); | |
1686 | goto end_free; | |
1687 | } | |
1688 | } | |
1689 | ret = bt_iter_next(bt_ctf_get_iter(iter)); | |
1690 | if (ret < 0) { | |
1691 | goto end_free; | |
1692 | } | |
1693 | } | |
1694 | bt_ctf_iter_destroy(iter); | |
2acdc547 JD |
1695 | g_hash_table_foreach_remove(ctx->session->ctf_traces, |
1696 | del_traces, ctx->bt_ctx); | |
1697 | ctx->session->stream_count = 0; | |
1698 | } | |
4a744367 JD |
1699 | |
1700 | end_free: | |
2acdc547 | 1701 | bt_context_put(ctx->bt_ctx); |
4a744367 | 1702 | end: |
e29395a8 JG |
1703 | if (lttng_live_should_quit()) { |
1704 | ret = 0; | |
1705 | } | |
28756729 | 1706 | return ret; |
4a744367 | 1707 | } |