Commit | Line | Data |
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4a744367 JD |
1 | /* |
2 | * Copyright (C) 2013 - Julien Desfossez <jdesfossez@efficios.com> | |
3 | * Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
4 | * | |
5 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
6 | * of this software and associated documentation files (the "Software"), to deal | |
7 | * in the Software without restriction, including without limitation the rights | |
8 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
9 | * copies of the Software, and to permit persons to whom the Software is | |
10 | * furnished to do so, subject to the following conditions: | |
11 | * | |
12 | * The above copyright notice and this permission notice shall be included in | |
13 | * all copies or substantial portions of the Software. | |
14 | * | |
15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
18 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
20 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
21 | * SOFTWARE. | |
22 | */ | |
23 | ||
24 | #include <sys/socket.h> | |
25 | #include <sys/types.h> | |
26 | #include <netinet/in.h> | |
27 | #include <netdb.h> | |
28 | #include <stdio.h> | |
4a744367 JD |
29 | #include <stdlib.h> |
30 | #include <unistd.h> | |
31 | #include <errno.h> | |
32 | #include <inttypes.h> | |
33 | #include <fcntl.h> | |
34 | #include <sys/mman.h> | |
85e2085e | 35 | #include <poll.h> |
4a744367 JD |
36 | |
37 | #include <babeltrace/ctf/ctf-index.h> | |
38 | ||
39 | #include <babeltrace/babeltrace.h> | |
f6afb94e | 40 | #include <babeltrace/endian.h> |
4a744367 JD |
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 | 53 | #include <babeltrace/compat/memstream.h> |
b319430e | 54 | #include <babeltrace/compat/send.h> |
5ea98697 | 55 | #include <babeltrace/compat/string.h> |
af701dc4 | 56 | |
c98627ca | 57 | #include "lttng-live.h" |
158eea6e | 58 | #include "lttng-viewer-abi.h" |
4a744367 | 59 | |
85e2085e MD |
60 | #define ACTIVE_POLL_DELAY 100 /* ms */ |
61 | ||
4a744367 JD |
62 | /* |
63 | * Memory allocation zeroed | |
64 | */ | |
65 | #define zmalloc(x) calloc(1, x) | |
66 | ||
67 | #ifndef max_t | |
68 | #define max_t(type, a, b) \ | |
69 | ((type) (a) > (type) (b) ? (type) (a) : (type) (b)) | |
70 | #endif | |
71 | ||
b5a1fa45 JD |
72 | static void ctf_live_packet_seek(struct bt_stream_pos *stream_pos, |
73 | size_t index, int whence); | |
7840bb08 | 74 | static int add_traces(struct lttng_live_ctx *ctx); |
2acdc547 | 75 | static int del_traces(gpointer key, gpointer value, gpointer user_data); |
9abca178 | 76 | static int get_new_metadata(struct lttng_live_ctx *ctx, |
af701dc4 JD |
77 | struct lttng_live_viewer_stream *viewer_stream, |
78 | char **metadata_buf); | |
2acdc547 | 79 | |
b7e8a8e1 MD |
80 | static |
81 | ssize_t lttng_live_recv(int fd, void *buf, size_t len) | |
82 | { | |
83 | ssize_t ret; | |
84 | size_t copied = 0, to_copy = len; | |
85 | ||
86 | do { | |
87 | ret = recv(fd, buf + copied, to_copy, 0); | |
88 | if (ret > 0) { | |
89 | assert(ret <= to_copy); | |
90 | copied += ret; | |
91 | to_copy -= ret; | |
92 | } | |
93 | } while ((ret > 0 && to_copy > 0) | |
94 | || (ret < 0 && errno == EINTR)); | |
95 | if (ret > 0) | |
96 | ret = copied; | |
97 | /* ret = 0 means orderly shutdown, ret < 0 is error. */ | |
98 | return ret; | |
99 | } | |
100 | ||
101 | static | |
102 | ssize_t lttng_live_send(int fd, const void *buf, size_t len) | |
103 | { | |
104 | ssize_t ret; | |
105 | ||
106 | do { | |
b319430e | 107 | ret = bt_send_nosigpipe(fd, buf, len); |
b7e8a8e1 MD |
108 | } while (ret < 0 && errno == EINTR); |
109 | return ret; | |
110 | } | |
111 | ||
b5a1fa45 | 112 | int lttng_live_connect_viewer(struct lttng_live_ctx *ctx) |
4a744367 JD |
113 | { |
114 | struct hostent *host; | |
115 | struct sockaddr_in server_addr; | |
116 | int ret; | |
117 | ||
8ace20bf | 118 | if (lttng_live_should_quit()) { |
4a744367 JD |
119 | ret = -1; |
120 | goto end; | |
121 | } | |
122 | ||
8ace20bf MD |
123 | host = gethostbyname(ctx->relay_hostname); |
124 | if (!host) { | |
125 | fprintf(stderr, "[error] Cannot lookup hostname %s\n", | |
126 | ctx->relay_hostname); | |
127 | goto error; | |
128 | } | |
129 | ||
4a744367 JD |
130 | if ((ctx->control_sock = socket(AF_INET, SOCK_STREAM, 0)) == -1) { |
131 | perror("Socket"); | |
8ace20bf | 132 | goto error; |
4a744367 JD |
133 | } |
134 | ||
135 | server_addr.sin_family = AF_INET; | |
b5a1fa45 | 136 | server_addr.sin_port = htons(ctx->port); |
4a744367 | 137 | server_addr.sin_addr = *((struct in_addr *) host->h_addr); |
ed959a6d | 138 | memset(&(server_addr.sin_zero), 0, 8); |
4a744367 JD |
139 | |
140 | if (connect(ctx->control_sock, (struct sockaddr *) &server_addr, | |
141 | sizeof(struct sockaddr)) == -1) { | |
142 | perror("Connect"); | |
8ace20bf | 143 | goto error; |
4a744367 JD |
144 | } |
145 | ||
146 | ret = 0; | |
147 | ||
148 | end: | |
149 | return ret; | |
8ace20bf MD |
150 | |
151 | error: | |
152 | fprintf(stderr, "[error] Connection failed\n"); | |
153 | return -1; | |
4a744367 JD |
154 | } |
155 | ||
156 | int lttng_live_establish_connection(struct lttng_live_ctx *ctx) | |
157 | { | |
158 | struct lttng_viewer_cmd cmd; | |
159 | struct lttng_viewer_connect connect; | |
160 | int ret; | |
161 | ssize_t ret_len; | |
162 | ||
8ace20bf MD |
163 | if (lttng_live_should_quit()) { |
164 | ret = -1; | |
165 | goto end; | |
166 | } | |
167 | ||
4a744367 JD |
168 | cmd.cmd = htobe32(LTTNG_VIEWER_CONNECT); |
169 | cmd.data_size = sizeof(connect); | |
170 | cmd.cmd_version = 0; | |
171 | ||
0c3cd7e1 | 172 | connect.viewer_session_id = -1ULL; /* will be set on recv */ |
4a744367 JD |
173 | connect.major = htobe32(LTTNG_LIVE_MAJOR); |
174 | connect.minor = htobe32(LTTNG_LIVE_MINOR); | |
175 | connect.type = htobe32(LTTNG_VIEWER_CLIENT_COMMAND); | |
176 | ||
b7e8a8e1 | 177 | ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd)); |
4a744367 | 178 | if (ret_len < 0) { |
79620497 | 179 | perror("[error] Error sending cmd"); |
4a744367 JD |
180 | goto error; |
181 | } | |
182 | assert(ret_len == sizeof(cmd)); | |
183 | ||
b7e8a8e1 | 184 | ret_len = lttng_live_send(ctx->control_sock, &connect, sizeof(connect)); |
4a744367 | 185 | if (ret_len < 0) { |
79620497 | 186 | perror("[error] Error sending version"); |
4a744367 JD |
187 | goto error; |
188 | } | |
189 | assert(ret_len == sizeof(connect)); | |
190 | ||
b7e8a8e1 | 191 | ret_len = lttng_live_recv(ctx->control_sock, &connect, sizeof(connect)); |
f8612f31 MD |
192 | if (ret_len == 0) { |
193 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
194 | goto error; |
195 | } | |
4a744367 | 196 | if (ret_len < 0) { |
79620497 | 197 | perror("[error] Error receiving version"); |
4a744367 JD |
198 | goto error; |
199 | } | |
200 | assert(ret_len == sizeof(connect)); | |
201 | ||
202 | printf_verbose("Received viewer session ID : %" PRIu64 "\n", | |
203 | be64toh(connect.viewer_session_id)); | |
204 | printf_verbose("Relayd version : %u.%u\n", be32toh(connect.major), | |
205 | be32toh(connect.minor)); | |
9aa155c5 JD |
206 | |
207 | if (LTTNG_LIVE_MAJOR != be32toh(connect.major)) { | |
208 | fprintf(stderr, "[error] Incompatible lttng-relayd protocol\n"); | |
209 | goto error; | |
210 | } | |
211 | /* Use the smallest protocol version implemented. */ | |
212 | if (LTTNG_LIVE_MINOR > be32toh(connect.minor)) { | |
213 | ctx->minor = be32toh(connect.minor); | |
214 | } else { | |
215 | ctx->minor = LTTNG_LIVE_MINOR; | |
216 | } | |
217 | ctx->major = LTTNG_LIVE_MAJOR; | |
4a744367 | 218 | ret = 0; |
8ace20bf MD |
219 | end: |
220 | return ret; | |
4a744367 JD |
221 | |
222 | error: | |
8ace20bf MD |
223 | fprintf(stderr, "[error] Unable to establish connection\n"); |
224 | return -1; | |
4a744367 JD |
225 | } |
226 | ||
b5a1fa45 JD |
227 | static |
228 | void free_session_list(GPtrArray *session_list) | |
229 | { | |
230 | int i; | |
231 | struct lttng_live_relay_session *relay_session; | |
232 | ||
233 | for (i = 0; i < session_list->len; i++) { | |
234 | relay_session = g_ptr_array_index(session_list, i); | |
235 | free(relay_session->name); | |
236 | free(relay_session->hostname); | |
237 | } | |
238 | g_ptr_array_free(session_list, TRUE); | |
239 | } | |
240 | ||
241 | static | |
242 | void print_session_list(GPtrArray *session_list, const char *path) | |
243 | { | |
244 | int i; | |
245 | struct lttng_live_relay_session *relay_session; | |
246 | ||
247 | for (i = 0; i < session_list->len; i++) { | |
248 | relay_session = g_ptr_array_index(session_list, i); | |
249 | fprintf(stdout, "%s/host/%s/%s (timer = %u, " | |
250 | "%u stream(s), %u client(s) connected)\n", | |
251 | path, relay_session->hostname, | |
252 | relay_session->name, relay_session->timer, | |
253 | relay_session->streams, relay_session->clients); | |
254 | } | |
255 | } | |
256 | ||
257 | static | |
258 | void update_session_list(GPtrArray *session_list, char *hostname, | |
259 | char *session_name, uint32_t streams, uint32_t clients, | |
260 | uint32_t timer) | |
261 | { | |
262 | int i, found = 0; | |
263 | struct lttng_live_relay_session *relay_session; | |
264 | ||
265 | for (i = 0; i < session_list->len; i++) { | |
266 | relay_session = g_ptr_array_index(session_list, i); | |
0206bb4a | 267 | if ((strncmp(relay_session->hostname, hostname, MAXNAMLEN) == 0) && |
b5a1fa45 | 268 | strncmp(relay_session->name, |
0206bb4a | 269 | session_name, MAXNAMLEN) == 0) { |
b5a1fa45 JD |
270 | relay_session->streams += streams; |
271 | if (relay_session->clients < clients) | |
272 | relay_session->clients = clients; | |
273 | found = 1; | |
274 | break; | |
275 | } | |
276 | } | |
277 | if (found) | |
278 | return; | |
279 | ||
280 | relay_session = g_new0(struct lttng_live_relay_session, 1); | |
5ea98697 MJ |
281 | relay_session->hostname = bt_strndup(hostname, MAXNAMLEN); |
282 | relay_session->name = bt_strndup(session_name, MAXNAMLEN); | |
b5a1fa45 JD |
283 | relay_session->clients = clients; |
284 | relay_session->streams = streams; | |
285 | relay_session->timer = timer; | |
286 | g_ptr_array_add(session_list, relay_session); | |
287 | } | |
288 | ||
4a744367 JD |
289 | int lttng_live_list_sessions(struct lttng_live_ctx *ctx, const char *path) |
290 | { | |
291 | struct lttng_viewer_cmd cmd; | |
292 | struct lttng_viewer_list_sessions list; | |
293 | struct lttng_viewer_session lsession; | |
b5a1fa45 | 294 | int i, ret, sessions_count, print_list = 0; |
4a744367 | 295 | ssize_t ret_len; |
b5a1fa45 JD |
296 | uint64_t session_id; |
297 | GPtrArray *session_list = NULL; | |
298 | ||
8ace20bf MD |
299 | if (lttng_live_should_quit()) { |
300 | ret = -1; | |
301 | goto end; | |
302 | } | |
303 | ||
b5a1fa45 JD |
304 | if (strlen(ctx->session_name) == 0) { |
305 | print_list = 1; | |
306 | session_list = g_ptr_array_new(); | |
307 | } | |
4a744367 JD |
308 | |
309 | cmd.cmd = htobe32(LTTNG_VIEWER_LIST_SESSIONS); | |
310 | cmd.data_size = 0; | |
311 | cmd.cmd_version = 0; | |
312 | ||
b7e8a8e1 | 313 | ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd)); |
4a744367 | 314 | if (ret_len < 0) { |
79620497 | 315 | perror("[error] Error sending cmd"); |
4a744367 JD |
316 | goto error; |
317 | } | |
318 | assert(ret_len == sizeof(cmd)); | |
319 | ||
b7e8a8e1 | 320 | ret_len = lttng_live_recv(ctx->control_sock, &list, sizeof(list)); |
f8612f31 MD |
321 | if (ret_len == 0) { |
322 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
323 | goto error; |
324 | } | |
4a744367 | 325 | if (ret_len < 0) { |
79620497 | 326 | perror("[error] Error receiving session list"); |
4a744367 JD |
327 | goto error; |
328 | } | |
329 | assert(ret_len == sizeof(list)); | |
330 | ||
331 | sessions_count = be32toh(list.sessions_count); | |
4a744367 | 332 | for (i = 0; i < sessions_count; i++) { |
b7e8a8e1 | 333 | ret_len = lttng_live_recv(ctx->control_sock, &lsession, sizeof(lsession)); |
f8612f31 MD |
334 | if (ret_len == 0) { |
335 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
336 | goto error; |
337 | } | |
4a744367 | 338 | if (ret_len < 0) { |
79620497 | 339 | perror("[error] Error receiving session"); |
4a744367 JD |
340 | goto error; |
341 | } | |
342 | assert(ret_len == sizeof(lsession)); | |
9ed31e53 MD |
343 | lsession.hostname[LTTNG_VIEWER_HOST_NAME_MAX - 1] = '\0'; |
344 | lsession.session_name[LTTNG_VIEWER_NAME_MAX - 1] = '\0'; | |
b5a1fa45 JD |
345 | session_id = be64toh(lsession.id); |
346 | ||
347 | if (print_list) { | |
348 | update_session_list(session_list, | |
349 | lsession.hostname, | |
350 | lsession.session_name, | |
351 | be32toh(lsession.streams), | |
352 | be32toh(lsession.clients), | |
353 | be32toh(lsession.live_timer)); | |
354 | } else { | |
355 | if ((strncmp(lsession.session_name, ctx->session_name, | |
0206bb4a MJ |
356 | MAXNAMLEN) == 0) && (strncmp(lsession.hostname, |
357 | ctx->traced_hostname, MAXNAMLEN) == 0)) { | |
b5a1fa45 JD |
358 | printf_verbose("Reading from session %" PRIu64 "\n", |
359 | session_id); | |
360 | g_array_append_val(ctx->session_ids, | |
361 | session_id); | |
362 | } | |
363 | } | |
364 | } | |
4a744367 | 365 | |
b5a1fa45 JD |
366 | if (print_list) { |
367 | print_session_list(session_list, path); | |
368 | free_session_list(session_list); | |
4a744367 | 369 | } |
4a744367 | 370 | ret = 0; |
8ace20bf MD |
371 | end: |
372 | return ret; | |
4a744367 JD |
373 | |
374 | error: | |
8ace20bf MD |
375 | fprintf(stderr, "[error] Unable to list sessions\n"); |
376 | return -1; | |
4a744367 JD |
377 | } |
378 | ||
379 | int lttng_live_ctf_trace_assign(struct lttng_live_viewer_stream *stream, | |
380 | uint64_t ctf_trace_id) | |
381 | { | |
382 | struct lttng_live_ctf_trace *trace; | |
383 | int ret = 0; | |
384 | ||
385 | trace = g_hash_table_lookup(stream->session->ctf_traces, | |
37307240 | 386 | &ctf_trace_id); |
4a744367 JD |
387 | if (!trace) { |
388 | trace = g_new0(struct lttng_live_ctf_trace, 1); | |
4a744367 JD |
389 | trace->ctf_trace_id = ctf_trace_id; |
390 | trace->streams = g_ptr_array_new(); | |
391 | g_hash_table_insert(stream->session->ctf_traces, | |
37307240 | 392 | &trace->ctf_trace_id, |
4a744367 JD |
393 | trace); |
394 | } | |
395 | if (stream->metadata_flag) | |
396 | trace->metadata_stream = stream; | |
397 | ||
398 | stream->ctf_trace = trace; | |
399 | g_ptr_array_add(trace->streams, stream); | |
400 | ||
4a744367 JD |
401 | return ret; |
402 | } | |
403 | ||
af701dc4 JD |
404 | static |
405 | int open_metadata_fp_write(struct lttng_live_viewer_stream *stream, | |
406 | char **metadata_buf, size_t *size) | |
407 | { | |
408 | int ret = 0; | |
409 | ||
410 | stream->metadata_fp_write = | |
411 | babeltrace_open_memstream(metadata_buf, size); | |
412 | if (!stream->metadata_fp_write) { | |
413 | perror("Metadata open_memstream"); | |
414 | ret = -1; | |
415 | } | |
416 | ||
417 | return ret; | |
418 | } | |
419 | ||
4a744367 JD |
420 | int lttng_live_attach_session(struct lttng_live_ctx *ctx, uint64_t id) |
421 | { | |
422 | struct lttng_viewer_cmd cmd; | |
423 | struct lttng_viewer_attach_session_request rq; | |
424 | struct lttng_viewer_attach_session_response rp; | |
425 | struct lttng_viewer_stream stream; | |
426 | int ret, i; | |
427 | ssize_t ret_len; | |
428 | ||
8ace20bf MD |
429 | if (lttng_live_should_quit()) { |
430 | ret = -1; | |
431 | goto end; | |
432 | } | |
433 | ||
4a744367 JD |
434 | cmd.cmd = htobe32(LTTNG_VIEWER_ATTACH_SESSION); |
435 | cmd.data_size = sizeof(rq); | |
436 | cmd.cmd_version = 0; | |
437 | ||
438 | memset(&rq, 0, sizeof(rq)); | |
439 | rq.session_id = htobe64(id); | |
440 | // TODO: add cmd line parameter to select seek beginning | |
441 | // rq.seek = htobe32(LTTNG_VIEWER_SEEK_BEGINNING); | |
442 | rq.seek = htobe32(LTTNG_VIEWER_SEEK_LAST); | |
443 | ||
b7e8a8e1 | 444 | ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd)); |
4a744367 | 445 | if (ret_len < 0) { |
79620497 | 446 | perror("[error] Error sending cmd"); |
4a744367 JD |
447 | goto error; |
448 | } | |
449 | assert(ret_len == sizeof(cmd)); | |
450 | ||
b7e8a8e1 | 451 | ret_len = lttng_live_send(ctx->control_sock, &rq, sizeof(rq)); |
4a744367 | 452 | if (ret_len < 0) { |
79620497 | 453 | perror("[error] Error sending attach request"); |
4a744367 JD |
454 | goto error; |
455 | } | |
456 | assert(ret_len == sizeof(rq)); | |
457 | ||
b7e8a8e1 | 458 | ret_len = lttng_live_recv(ctx->control_sock, &rp, sizeof(rp)); |
f8612f31 MD |
459 | if (ret_len == 0) { |
460 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
461 | goto error; |
462 | } | |
4a744367 | 463 | if (ret_len < 0) { |
79620497 | 464 | perror("[error] Error receiving attach response"); |
4a744367 JD |
465 | goto error; |
466 | } | |
467 | assert(ret_len == sizeof(rp)); | |
468 | ||
469 | switch(be32toh(rp.status)) { | |
470 | case LTTNG_VIEWER_ATTACH_OK: | |
471 | break; | |
472 | case LTTNG_VIEWER_ATTACH_UNK: | |
473 | ret = -LTTNG_VIEWER_ATTACH_UNK; | |
474 | goto end; | |
475 | case LTTNG_VIEWER_ATTACH_ALREADY: | |
79620497 | 476 | fprintf(stderr, "[error] There is already a viewer attached to this session\n"); |
8ace20bf | 477 | goto error; |
4a744367 JD |
478 | case LTTNG_VIEWER_ATTACH_NOT_LIVE: |
479 | fprintf(stderr, "[error] Not a live session\n"); | |
8ace20bf | 480 | goto error; |
4a744367 JD |
481 | case LTTNG_VIEWER_ATTACH_SEEK_ERR: |
482 | fprintf(stderr, "[error] Wrong seek parameter\n"); | |
8ace20bf | 483 | goto error; |
4a744367 JD |
484 | default: |
485 | fprintf(stderr, "[error] Unknown attach return code %u\n", | |
486 | be32toh(rp.status)); | |
8ace20bf | 487 | goto error; |
4a744367 JD |
488 | } |
489 | if (be32toh(rp.status) != LTTNG_VIEWER_ATTACH_OK) { | |
8ace20bf | 490 | goto error; |
4a744367 JD |
491 | } |
492 | ||
2acdc547 | 493 | ctx->session->stream_count += be32toh(rp.streams_count); |
4a744367 JD |
494 | /* |
495 | * When the session is created but not started, we do an active wait | |
496 | * until it starts. It allows the viewer to start processing the trace | |
497 | * as soon as the session starts. | |
498 | */ | |
499 | if (ctx->session->stream_count == 0) { | |
500 | ret = 0; | |
501 | goto end; | |
502 | } | |
503 | printf_verbose("Waiting for %" PRIu64 " streams:\n", | |
504 | ctx->session->stream_count); | |
505 | ctx->session->streams = g_new0(struct lttng_live_viewer_stream, | |
506 | ctx->session->stream_count); | |
4a744367 | 507 | for (i = 0; i < be32toh(rp.streams_count); i++) { |
b7e8a8e1 | 508 | ret_len = lttng_live_recv(ctx->control_sock, &stream, sizeof(stream)); |
f8612f31 MD |
509 | if (ret_len == 0) { |
510 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
511 | goto error; |
512 | } | |
4a744367 | 513 | if (ret_len < 0) { |
79620497 | 514 | perror("[error] Error receiving stream"); |
4a744367 JD |
515 | goto error; |
516 | } | |
517 | assert(ret_len == sizeof(stream)); | |
9ed31e53 MD |
518 | stream.path_name[LTTNG_VIEWER_PATH_MAX - 1] = '\0'; |
519 | stream.channel_name[LTTNG_VIEWER_NAME_MAX - 1] = '\0'; | |
4a744367 JD |
520 | |
521 | printf_verbose(" stream %" PRIu64 " : %s/%s\n", | |
522 | be64toh(stream.id), stream.path_name, | |
523 | stream.channel_name); | |
524 | ctx->session->streams[i].id = be64toh(stream.id); | |
525 | ctx->session->streams[i].session = ctx->session; | |
526 | ||
4a744367 | 527 | ctx->session->streams[i].mmap_size = 0; |
fb6b45aa | 528 | ctx->session->streams[i].ctf_stream_id = -1ULL; |
4a744367 JD |
529 | |
530 | if (be32toh(stream.metadata_flag)) { | |
4a744367 | 531 | ctx->session->streams[i].metadata_flag = 1; |
4a744367 JD |
532 | } |
533 | ret = lttng_live_ctf_trace_assign(&ctx->session->streams[i], | |
534 | be64toh(stream.ctf_trace_id)); | |
535 | if (ret < 0) { | |
536 | goto error; | |
537 | } | |
538 | ||
539 | } | |
540 | ret = 0; | |
4a744367 | 541 | end: |
4a744367 | 542 | return ret; |
8ace20bf MD |
543 | |
544 | error: | |
545 | return -1; | |
4a744367 JD |
546 | } |
547 | ||
73b2b0d1 JD |
548 | /* |
549 | * Ask the relay for new streams. | |
550 | * | |
551 | * Returns the number of new streams received or a negative value on error. | |
552 | */ | |
2acdc547 JD |
553 | static |
554 | int ask_new_streams(struct lttng_live_ctx *ctx) | |
555 | { | |
73b2b0d1 | 556 | int i, ret = 0, nb_streams = 0; |
2acdc547 JD |
557 | uint64_t id; |
558 | ||
559 | restart: | |
560 | for (i = 0; i < ctx->session_ids->len; i++) { | |
561 | id = g_array_index(ctx->session_ids, uint64_t, i); | |
562 | ret = lttng_live_get_new_streams(ctx, id); | |
73b2b0d1 | 563 | printf_verbose("Asking for new streams returns %d\n", ret); |
2acdc547 | 564 | if (ret < 0) { |
e29395a8 JG |
565 | if (lttng_live_should_quit()) { |
566 | goto end; | |
567 | } | |
2acdc547 JD |
568 | if (ret == -LTTNG_VIEWER_NEW_STREAMS_HUP) { |
569 | printf_verbose("Session %" PRIu64 " closed\n", | |
570 | id); | |
b5a1fa45 JD |
571 | /* |
572 | * The streams have already been closed during | |
573 | * the reading, so we only need to get rid of | |
574 | * the trace in our internal table of sessions. | |
575 | */ | |
2acdc547 JD |
576 | g_array_remove_index(ctx->session_ids, i); |
577 | /* | |
578 | * We can't continue iterating on the g_array | |
579 | * after a remove, we have to start again. | |
580 | */ | |
581 | goto restart; | |
582 | } else { | |
583 | ret = -1; | |
584 | goto end; | |
585 | } | |
73b2b0d1 JD |
586 | } else { |
587 | nb_streams += ret; | |
2acdc547 JD |
588 | } |
589 | } | |
73b2b0d1 | 590 | ret = nb_streams; |
2acdc547 JD |
591 | |
592 | end: | |
593 | return ret; | |
594 | } | |
595 | ||
50d207af JD |
596 | static |
597 | int append_metadata(struct lttng_live_ctx *ctx, | |
598 | struct lttng_live_viewer_stream *viewer_stream) | |
599 | { | |
600 | int ret; | |
601 | struct lttng_live_viewer_stream *metadata; | |
602 | char *metadata_buf = NULL; | |
603 | ||
604 | printf_verbose("get_next_index: new metadata needed\n"); | |
605 | ret = get_new_metadata(ctx, viewer_stream, &metadata_buf); | |
606 | if (ret < 0) { | |
607 | free(metadata_buf); | |
608 | goto error; | |
609 | } | |
610 | ||
611 | metadata = viewer_stream->ctf_trace->metadata_stream; | |
612 | metadata->ctf_trace->metadata_fp = | |
613 | babeltrace_fmemopen(metadata_buf, | |
614 | metadata->metadata_len, "rb"); | |
615 | if (!metadata->ctf_trace->metadata_fp) { | |
616 | perror("Metadata fmemopen"); | |
617 | free(metadata_buf); | |
618 | ret = -1; | |
619 | goto error; | |
620 | } | |
621 | ret = ctf_append_trace_metadata( | |
622 | viewer_stream->ctf_trace->handle->td, | |
623 | metadata->ctf_trace->metadata_fp); | |
251fc08c MD |
624 | /* We accept empty metadata packets */ |
625 | if (ret != 0 && ret != -ENOENT) { | |
50d207af JD |
626 | fprintf(stderr, "[error] Appending metadata\n"); |
627 | goto error; | |
628 | } | |
251fc08c | 629 | ret = 0; |
50d207af JD |
630 | |
631 | error: | |
632 | return ret; | |
633 | } | |
634 | ||
4a744367 JD |
635 | static |
636 | int get_data_packet(struct lttng_live_ctx *ctx, | |
637 | struct ctf_stream_pos *pos, | |
638 | struct lttng_live_viewer_stream *stream, uint64_t offset, | |
639 | uint64_t len) | |
640 | { | |
641 | struct lttng_viewer_cmd cmd; | |
642 | struct lttng_viewer_get_packet rq; | |
643 | struct lttng_viewer_trace_packet rp; | |
644 | ssize_t ret_len; | |
645 | int ret; | |
646 | ||
50d207af | 647 | retry: |
8ace20bf MD |
648 | if (lttng_live_should_quit()) { |
649 | ret = -1; | |
650 | goto end; | |
651 | } | |
4a744367 JD |
652 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_PACKET); |
653 | cmd.data_size = sizeof(rq); | |
654 | cmd.cmd_version = 0; | |
655 | ||
656 | memset(&rq, 0, sizeof(rq)); | |
657 | rq.stream_id = htobe64(stream->id); | |
c1e8ac81 | 658 | rq.offset = htobe64(offset); |
4a744367 JD |
659 | rq.len = htobe32(len); |
660 | ||
b7e8a8e1 | 661 | ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd)); |
4a744367 | 662 | if (ret_len < 0) { |
79620497 | 663 | perror("[error] Error sending cmd"); |
4a744367 JD |
664 | goto error; |
665 | } | |
666 | assert(ret_len == sizeof(cmd)); | |
667 | ||
b7e8a8e1 | 668 | ret_len = lttng_live_send(ctx->control_sock, &rq, sizeof(rq)); |
4a744367 | 669 | if (ret_len < 0) { |
79620497 | 670 | perror("[error] Error sending get_data_packet request"); |
4a744367 JD |
671 | goto error; |
672 | } | |
673 | assert(ret_len == sizeof(rq)); | |
674 | ||
b7e8a8e1 | 675 | ret_len = lttng_live_recv(ctx->control_sock, &rp, sizeof(rp)); |
f8612f31 MD |
676 | if (ret_len == 0) { |
677 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
678 | goto error; |
679 | } | |
4a744367 | 680 | if (ret_len < 0) { |
79620497 | 681 | perror("[error] Error receiving data response"); |
4a744367 JD |
682 | goto error; |
683 | } | |
57b9d843 | 684 | if (ret_len != sizeof(rp)) { |
7e5e4176 MD |
685 | fprintf(stderr, "[error] get_data_packet: expected %zu" |
686 | ", received %zd\n", sizeof(rp), | |
a5e4b11e | 687 | ret_len); |
57b9d843 JD |
688 | goto error; |
689 | } | |
4a744367 JD |
690 | |
691 | rp.flags = be32toh(rp.flags); | |
692 | ||
693 | switch (be32toh(rp.status)) { | |
694 | case LTTNG_VIEWER_GET_PACKET_OK: | |
695 | len = be32toh(rp.len); | |
696 | printf_verbose("get_data_packet: Ok, packet size : %" PRIu64 | |
697 | "\n", len); | |
698 | break; | |
699 | case LTTNG_VIEWER_GET_PACKET_RETRY: | |
8ace20bf | 700 | /* Unimplemented by relay daemon */ |
4a744367 | 701 | printf_verbose("get_data_packet: retry\n"); |
8ace20bf | 702 | goto error; |
4a744367 JD |
703 | case LTTNG_VIEWER_GET_PACKET_ERR: |
704 | if (rp.flags & LTTNG_VIEWER_FLAG_NEW_METADATA) { | |
705 | printf_verbose("get_data_packet: new metadata needed\n"); | |
50d207af JD |
706 | ret = append_metadata(ctx, stream); |
707 | if (ret) | |
708 | goto error; | |
4a744367 | 709 | } |
2acdc547 | 710 | if (rp.flags & LTTNG_VIEWER_FLAG_NEW_STREAM) { |
f312b3aa | 711 | printf_verbose("get_data_packet: new streams needed\n"); |
2acdc547 | 712 | ret = ask_new_streams(ctx); |
7840bb08 | 713 | if (ret < 0) { |
2acdc547 | 714 | goto error; |
7840bb08 JD |
715 | } else if (ret > 0) { |
716 | ret = add_traces(ctx); | |
717 | if (ret < 0) { | |
718 | goto error; | |
719 | } | |
720 | } | |
2acdc547 | 721 | } |
f312b3aa MD |
722 | if (rp.flags & (LTTNG_VIEWER_FLAG_NEW_METADATA |
723 | | LTTNG_VIEWER_FLAG_NEW_STREAM)) { | |
724 | goto retry; | |
725 | } | |
4a744367 | 726 | fprintf(stderr, "[error] get_data_packet: error\n"); |
8ace20bf | 727 | goto error; |
4a744367 JD |
728 | case LTTNG_VIEWER_GET_PACKET_EOF: |
729 | ret = -2; | |
8ace20bf | 730 | goto end; |
4a744367 JD |
731 | default: |
732 | printf_verbose("get_data_packet: unknown\n"); | |
8ace20bf | 733 | goto error; |
4a744367 JD |
734 | } |
735 | ||
65ae9a82 | 736 | if (len == 0) { |
96943040 | 737 | goto error; |
4a744367 JD |
738 | } |
739 | ||
740 | if (len > stream->mmap_size) { | |
741 | uint64_t new_size; | |
742 | ||
743 | new_size = max_t(uint64_t, len, stream->mmap_size << 1); | |
744 | if (pos->base_mma) { | |
745 | /* unmap old base */ | |
746 | ret = munmap_align(pos->base_mma); | |
747 | if (ret) { | |
79620497 | 748 | perror("[error] Unable to unmap old base"); |
4a744367 JD |
749 | goto error; |
750 | } | |
751 | pos->base_mma = NULL; | |
752 | } | |
753 | pos->base_mma = mmap_align(new_size, | |
754 | PROT_READ | PROT_WRITE, | |
755 | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); | |
756 | if (pos->base_mma == MAP_FAILED) { | |
79620497 | 757 | perror("[error] mmap error"); |
4a744367 | 758 | pos->base_mma = NULL; |
4a744367 JD |
759 | goto error; |
760 | } | |
761 | ||
762 | stream->mmap_size = new_size; | |
763 | printf_verbose("Expanding stream mmap size to %" PRIu64 " bytes\n", | |
764 | stream->mmap_size); | |
765 | } | |
766 | ||
b7e8a8e1 MD |
767 | ret_len = lttng_live_recv(ctx->control_sock, |
768 | mmap_align_addr(pos->base_mma), len); | |
f8612f31 MD |
769 | if (ret_len == 0) { |
770 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
771 | goto error; |
772 | } | |
4a744367 | 773 | if (ret_len < 0) { |
79620497 | 774 | perror("[error] Error receiving trace packet"); |
4a744367 JD |
775 | goto error; |
776 | } | |
777 | assert(ret_len == len); | |
f312b3aa | 778 | ret = 0; |
4a744367 | 779 | end: |
4a744367 | 780 | return ret; |
8ace20bf MD |
781 | |
782 | error: | |
783 | return -1; | |
4a744367 JD |
784 | } |
785 | ||
4a744367 | 786 | static |
9abca178 JD |
787 | int get_one_metadata_packet(struct lttng_live_ctx *ctx, |
788 | struct lttng_live_viewer_stream *metadata_stream) | |
4a744367 JD |
789 | { |
790 | uint64_t len = 0; | |
791 | int ret; | |
792 | struct lttng_viewer_cmd cmd; | |
793 | struct lttng_viewer_get_metadata rq; | |
794 | struct lttng_viewer_metadata_packet rp; | |
4a744367 JD |
795 | char *data = NULL; |
796 | ssize_t ret_len; | |
797 | ||
8ace20bf MD |
798 | if (lttng_live_should_quit()) { |
799 | ret = -1; | |
800 | goto end; | |
801 | } | |
802 | ||
9abca178 | 803 | rq.stream_id = htobe64(metadata_stream->id); |
4a744367 JD |
804 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_METADATA); |
805 | cmd.data_size = sizeof(rq); | |
806 | cmd.cmd_version = 0; | |
807 | ||
b7e8a8e1 | 808 | ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd)); |
4a744367 | 809 | if (ret_len < 0) { |
79620497 | 810 | perror("[error] Error sending cmd"); |
4a744367 JD |
811 | goto error; |
812 | } | |
813 | assert(ret_len == sizeof(cmd)); | |
814 | ||
b7e8a8e1 | 815 | ret_len = lttng_live_send(ctx->control_sock, &rq, sizeof(rq)); |
4a744367 | 816 | if (ret_len < 0) { |
79620497 | 817 | perror("[error] Error sending get_metadata request"); |
4a744367 JD |
818 | goto error; |
819 | } | |
820 | assert(ret_len == sizeof(rq)); | |
821 | ||
b7e8a8e1 | 822 | ret_len = lttng_live_recv(ctx->control_sock, &rp, sizeof(rp)); |
f8612f31 MD |
823 | if (ret_len == 0) { |
824 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
825 | goto error; |
826 | } | |
4a744367 | 827 | if (ret_len < 0) { |
79620497 | 828 | perror("[error] Error receiving metadata response"); |
4a744367 JD |
829 | goto error; |
830 | } | |
831 | assert(ret_len == sizeof(rp)); | |
832 | ||
833 | switch (be32toh(rp.status)) { | |
834 | case LTTNG_VIEWER_METADATA_OK: | |
835 | printf_verbose("get_metadata : OK\n"); | |
836 | break; | |
837 | case LTTNG_VIEWER_NO_NEW_METADATA: | |
838 | printf_verbose("get_metadata : NO NEW\n"); | |
9abca178 | 839 | ret = 0; |
4a744367 JD |
840 | goto end; |
841 | case LTTNG_VIEWER_METADATA_ERR: | |
842 | printf_verbose("get_metadata : ERR\n"); | |
8ace20bf | 843 | goto error; |
4a744367 JD |
844 | default: |
845 | printf_verbose("get_metadata : UNKNOWN\n"); | |
8ace20bf | 846 | goto error; |
4a744367 JD |
847 | } |
848 | ||
849 | len = be64toh(rp.len); | |
850 | printf_verbose("Writing %" PRIu64" bytes to metadata\n", len); | |
851 | if (len <= 0) { | |
8ace20bf | 852 | goto error; |
4a744367 JD |
853 | } |
854 | ||
855 | data = zmalloc(len); | |
856 | if (!data) { | |
857 | perror("relay data zmalloc"); | |
4a744367 JD |
858 | goto error; |
859 | } | |
b7e8a8e1 | 860 | ret_len = lttng_live_recv(ctx->control_sock, data, len); |
f8612f31 MD |
861 | if (ret_len == 0) { |
862 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
8ace20bf | 863 | goto error_free_data; |
f8612f31 | 864 | } |
4a744367 | 865 | if (ret_len < 0) { |
79620497 | 866 | perror("[error] Error receiving trace packet"); |
8ace20bf | 867 | goto error_free_data; |
4a744367 JD |
868 | } |
869 | assert(ret_len == len); | |
870 | ||
871 | do { | |
af701dc4 JD |
872 | ret_len = fwrite(data, 1, len, |
873 | metadata_stream->metadata_fp_write); | |
4a744367 JD |
874 | } while (ret_len < 0 && errno == EINTR); |
875 | if (ret_len < 0) { | |
af701dc4 | 876 | fprintf(stderr, "[error] Writing in the metadata fp\n"); |
8ace20bf | 877 | goto error_free_data; |
4a744367 JD |
878 | } |
879 | assert(ret_len == len); | |
af701dc4 | 880 | metadata_stream->metadata_len += len; |
8ace20bf | 881 | free(data); |
9abca178 | 882 | ret = len; |
8ace20bf MD |
883 | end: |
884 | return ret; | |
4a744367 | 885 | |
8ace20bf | 886 | error_free_data: |
4a744367 | 887 | free(data); |
4a744367 | 888 | error: |
8ace20bf | 889 | return -1; |
4a744367 JD |
890 | } |
891 | ||
9abca178 JD |
892 | /* |
893 | * Return 0 on success, a negative value on error. | |
894 | */ | |
895 | static | |
896 | int get_new_metadata(struct lttng_live_ctx *ctx, | |
af701dc4 JD |
897 | struct lttng_live_viewer_stream *viewer_stream, |
898 | char **metadata_buf) | |
9abca178 JD |
899 | { |
900 | int ret = 0; | |
901 | struct lttng_live_viewer_stream *metadata_stream; | |
73b2b0d1 | 902 | size_t size, len_read = 0; |
9abca178 JD |
903 | |
904 | metadata_stream = viewer_stream->ctf_trace->metadata_stream; | |
50d207af JD |
905 | if (!metadata_stream) { |
906 | fprintf(stderr, "[error] No metadata stream\n"); | |
907 | ret = -1; | |
908 | goto error; | |
909 | } | |
af701dc4 JD |
910 | metadata_stream->metadata_len = 0; |
911 | ret = open_metadata_fp_write(metadata_stream, metadata_buf, &size); | |
912 | if (ret < 0) { | |
913 | goto error; | |
914 | } | |
9abca178 JD |
915 | |
916 | do { | |
d1694e41 JD |
917 | if (lttng_live_should_quit()) { |
918 | ret = -1; | |
919 | goto error; | |
920 | } | |
9abca178 JD |
921 | /* |
922 | * get_one_metadata_packet returns the number of bytes | |
923 | * received, 0 when we have received everything, a | |
924 | * negative value on error. | |
925 | */ | |
926 | ret = get_one_metadata_packet(ctx, metadata_stream); | |
c111d5d7 MD |
927 | if (ret > 0) { |
928 | len_read += ret; | |
929 | } | |
85e2085e MD |
930 | if (!len_read) { |
931 | (void) poll(NULL, 0, ACTIVE_POLL_DELAY); | |
932 | } | |
c111d5d7 | 933 | } while (ret > 0 || !len_read); |
9abca178 | 934 | |
91bb0024 MD |
935 | if (babeltrace_close_memstream(metadata_buf, &size, |
936 | metadata_stream->metadata_fp_write)) { | |
937 | perror("babeltrace_close_memstream"); | |
938 | } | |
af701dc4 JD |
939 | metadata_stream->metadata_fp_write = NULL; |
940 | ||
941 | error: | |
9abca178 JD |
942 | return ret; |
943 | } | |
944 | ||
fb6b45aa JD |
945 | /* |
946 | * Assign the fields from a lttng_viewer_index to a packet_index. | |
947 | */ | |
948 | static | |
949 | void lttng_index_to_packet_index(struct lttng_viewer_index *lindex, | |
950 | struct packet_index *pindex) | |
951 | { | |
952 | assert(lindex); | |
953 | assert(pindex); | |
954 | ||
955 | pindex->offset = be64toh(lindex->offset); | |
956 | pindex->packet_size = be64toh(lindex->packet_size); | |
957 | pindex->content_size = be64toh(lindex->content_size); | |
958 | pindex->ts_cycles.timestamp_begin = be64toh(lindex->timestamp_begin); | |
959 | pindex->ts_cycles.timestamp_end = be64toh(lindex->timestamp_end); | |
960 | pindex->events_discarded = be64toh(lindex->events_discarded); | |
961 | } | |
962 | ||
4a744367 JD |
963 | /* |
964 | * Get one index for a stream. | |
965 | * | |
966 | * Returns 0 on success or a negative value on error. | |
967 | */ | |
968 | static | |
969 | int get_next_index(struct lttng_live_ctx *ctx, | |
970 | struct lttng_live_viewer_stream *viewer_stream, | |
fb6b45aa | 971 | struct packet_index *index, uint64_t *stream_id) |
4a744367 JD |
972 | { |
973 | struct lttng_viewer_cmd cmd; | |
974 | struct lttng_viewer_get_next_index rq; | |
4a744367 | 975 | int ret; |
4a744367 | 976 | ssize_t ret_len; |
fb6b45aa | 977 | struct lttng_viewer_index *rp = &viewer_stream->current_index; |
4a744367 JD |
978 | |
979 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_NEXT_INDEX); | |
980 | cmd.data_size = sizeof(rq); | |
981 | cmd.cmd_version = 0; | |
982 | ||
983 | memset(&rq, 0, sizeof(rq)); | |
984 | rq.stream_id = htobe64(viewer_stream->id); | |
985 | ||
986 | retry: | |
8ace20bf MD |
987 | if (lttng_live_should_quit()) { |
988 | ret = -1; | |
989 | goto end; | |
990 | } | |
b7e8a8e1 | 991 | ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd)); |
4a744367 | 992 | if (ret_len < 0) { |
79620497 | 993 | perror("[error] Error sending cmd"); |
4a744367 JD |
994 | goto error; |
995 | } | |
996 | assert(ret_len == sizeof(cmd)); | |
997 | ||
b7e8a8e1 | 998 | ret_len = lttng_live_send(ctx->control_sock, &rq, sizeof(rq)); |
4a744367 | 999 | if (ret_len < 0) { |
79620497 | 1000 | perror("[error] Error sending get_next_index request"); |
4a744367 JD |
1001 | goto error; |
1002 | } | |
1003 | assert(ret_len == sizeof(rq)); | |
1004 | ||
fb6b45aa | 1005 | ret_len = lttng_live_recv(ctx->control_sock, rp, sizeof(*rp)); |
f8612f31 MD |
1006 | if (ret_len == 0) { |
1007 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
1008 | goto error; |
1009 | } | |
4a744367 | 1010 | if (ret_len < 0) { |
79620497 | 1011 | perror("[error] Error receiving index response"); |
4a744367 JD |
1012 | goto error; |
1013 | } | |
fb6b45aa | 1014 | assert(ret_len == sizeof(*rp)); |
4a744367 | 1015 | |
fb6b45aa | 1016 | rp->flags = be32toh(rp->flags); |
4a744367 | 1017 | |
fb6b45aa | 1018 | switch (be32toh(rp->status)) { |
4a744367 JD |
1019 | case LTTNG_VIEWER_INDEX_INACTIVE: |
1020 | printf_verbose("get_next_index: inactive\n"); | |
1021 | memset(index, 0, sizeof(struct packet_index)); | |
fb6b45aa JD |
1022 | index->ts_cycles.timestamp_end = be64toh(rp->timestamp_end); |
1023 | *stream_id = be64toh(rp->stream_id); | |
4a744367 JD |
1024 | break; |
1025 | case LTTNG_VIEWER_INDEX_OK: | |
1026 | printf_verbose("get_next_index: Ok, need metadata update : %u\n", | |
fb6b45aa JD |
1027 | rp->flags & LTTNG_VIEWER_FLAG_NEW_METADATA); |
1028 | lttng_index_to_packet_index(rp, index); | |
1029 | *stream_id = be64toh(rp->stream_id); | |
1030 | viewer_stream->data_pending = 1; | |
4a744367 | 1031 | |
fb6b45aa | 1032 | if (rp->flags & LTTNG_VIEWER_FLAG_NEW_METADATA) { |
50d207af JD |
1033 | ret = append_metadata(ctx, viewer_stream); |
1034 | if (ret) | |
4a744367 | 1035 | goto error; |
4a744367 | 1036 | } |
fb6b45aa | 1037 | if (rp->flags & LTTNG_VIEWER_FLAG_NEW_STREAM) { |
73b2b0d1 | 1038 | printf_verbose("get_next_index: need new streams\n"); |
2acdc547 | 1039 | ret = ask_new_streams(ctx); |
7840bb08 | 1040 | if (ret < 0) { |
2acdc547 | 1041 | goto error; |
7840bb08 JD |
1042 | } else if (ret > 0) { |
1043 | ret = add_traces(ctx); | |
1044 | if (ret < 0) { | |
1045 | goto error; | |
1046 | } | |
1047 | } | |
2acdc547 | 1048 | } |
4a744367 JD |
1049 | break; |
1050 | case LTTNG_VIEWER_INDEX_RETRY: | |
1051 | printf_verbose("get_next_index: retry\n"); | |
85e2085e | 1052 | (void) poll(NULL, 0, ACTIVE_POLL_DELAY); |
4a744367 JD |
1053 | goto retry; |
1054 | case LTTNG_VIEWER_INDEX_HUP: | |
1055 | printf_verbose("get_next_index: stream hung up\n"); | |
1056 | viewer_stream->id = -1ULL; | |
4a744367 | 1057 | index->offset = EOF; |
2acdc547 | 1058 | ctx->session->stream_count--; |
4a744367 JD |
1059 | break; |
1060 | case LTTNG_VIEWER_INDEX_ERR: | |
1061 | fprintf(stderr, "[error] get_next_index: error\n"); | |
4a744367 JD |
1062 | goto error; |
1063 | default: | |
1064 | fprintf(stderr, "[error] get_next_index: unkwown value\n"); | |
4a744367 JD |
1065 | goto error; |
1066 | } | |
4a744367 | 1067 | ret = 0; |
8ace20bf MD |
1068 | end: |
1069 | return ret; | |
4a744367 JD |
1070 | |
1071 | error: | |
8ace20bf | 1072 | return -1; |
4a744367 JD |
1073 | } |
1074 | ||
fb6b45aa JD |
1075 | static |
1076 | void read_packet_header(struct ctf_stream_pos *pos, | |
1077 | struct ctf_file_stream *file_stream) | |
1078 | { | |
1079 | int ret; | |
1080 | ||
1081 | /* update trace_packet_header and stream_packet_context */ | |
fcf10417 JG |
1082 | if (!(pos->prot & PROT_WRITE) && |
1083 | file_stream->parent.trace_packet_header) { | |
fb6b45aa JD |
1084 | /* Read packet header */ |
1085 | ret = generic_rw(&pos->parent, | |
1086 | &file_stream->parent.trace_packet_header->p); | |
1087 | if (ret) { | |
1088 | pos->offset = EOF; | |
1089 | fprintf(stderr, "[error] trace packet " | |
1090 | "header read failed\n"); | |
1091 | goto end; | |
1092 | } | |
1093 | } | |
fcf10417 JG |
1094 | if (!(pos->prot & PROT_WRITE) && |
1095 | file_stream->parent.stream_packet_context) { | |
fb6b45aa JD |
1096 | /* Read packet context */ |
1097 | ret = generic_rw(&pos->parent, | |
1098 | &file_stream->parent.stream_packet_context->p); | |
1099 | if (ret) { | |
1100 | pos->offset = EOF; | |
1101 | fprintf(stderr, "[error] stream packet " | |
1102 | "context read failed\n"); | |
1103 | goto end; | |
1104 | } | |
1105 | } | |
1106 | pos->data_offset = pos->offset; | |
1107 | ||
1108 | end: | |
1109 | return; | |
1110 | } | |
1111 | ||
1112 | /* | |
1113 | * Handle the seek parameters. | |
1114 | * Returns 0 if the packet_seek can continue, a positive value to | |
1115 | * cleanly exit the packet_seek, a negative value on error. | |
1116 | */ | |
1117 | static | |
1118 | int handle_seek_position(size_t index, int whence, | |
1119 | struct lttng_live_viewer_stream *viewer_stream, | |
1120 | struct ctf_stream_pos *pos, | |
1121 | struct ctf_file_stream *file_stream) | |
1122 | { | |
6a724a1e | 1123 | int ret = 0; |
fb6b45aa JD |
1124 | |
1125 | switch (whence) { | |
1126 | case SEEK_CUR: | |
1127 | ret = 0; | |
1128 | goto end; | |
1129 | case SEEK_SET: | |
1130 | /* | |
1131 | * We only allow to seek to 0. | |
1132 | */ | |
1133 | if (index != 0) { | |
1134 | fprintf(stderr, "[error] Arbitrary seek in lttng-live " | |
1135 | "trace not supported\n"); | |
1136 | pos->offset = EOF; | |
1137 | ret = -1; | |
1138 | goto end; | |
1139 | } | |
1140 | ||
1141 | ret = 0; | |
1142 | goto end; | |
1143 | ||
1144 | default: | |
1145 | fprintf(stderr, "[error] Invalid seek parameter\n"); | |
1146 | assert(0); | |
1147 | } | |
1148 | ||
1149 | end: | |
1150 | return ret; | |
1151 | } | |
1152 | ||
b5a1fa45 | 1153 | static |
4a744367 JD |
1154 | void ctf_live_packet_seek(struct bt_stream_pos *stream_pos, size_t index, |
1155 | int whence) | |
1156 | { | |
1157 | struct ctf_stream_pos *pos; | |
1158 | struct ctf_file_stream *file_stream; | |
f1f52630 | 1159 | struct packet_index *prev_index = NULL, *cur_index; |
4a744367 JD |
1160 | struct lttng_live_viewer_stream *viewer_stream; |
1161 | struct lttng_live_session *session; | |
fb6b45aa | 1162 | uint64_t stream_id = -1ULL; |
4a744367 JD |
1163 | int ret; |
1164 | ||
4a744367 JD |
1165 | pos = ctf_pos(stream_pos); |
1166 | file_stream = container_of(pos, struct ctf_file_stream, pos); | |
1167 | viewer_stream = (struct lttng_live_viewer_stream *) pos->priv; | |
1168 | session = viewer_stream->session; | |
1169 | ||
fb6b45aa JD |
1170 | ret = handle_seek_position(index, whence, viewer_stream, pos, |
1171 | file_stream); | |
1172 | if (ret != 0) { | |
1173 | return; | |
1174 | } | |
1175 | ||
1176 | retry: | |
f1f52630 MD |
1177 | switch (pos->packet_index->len) { |
1178 | case 0: | |
1179 | g_array_set_size(pos->packet_index, 1); | |
1180 | cur_index = &g_array_index(pos->packet_index, | |
1181 | struct packet_index, 0); | |
1182 | break; | |
1183 | case 1: | |
1184 | g_array_set_size(pos->packet_index, 2); | |
1185 | prev_index = &g_array_index(pos->packet_index, | |
1186 | struct packet_index, 0); | |
1187 | cur_index = &g_array_index(pos->packet_index, | |
1188 | struct packet_index, 1); | |
1189 | break; | |
1190 | case 2: | |
1191 | g_array_index(pos->packet_index, | |
1192 | struct packet_index, 0) = | |
1193 | g_array_index(pos->packet_index, | |
1194 | struct packet_index, 1); | |
1195 | prev_index = &g_array_index(pos->packet_index, | |
1196 | struct packet_index, 0); | |
1197 | cur_index = &g_array_index(pos->packet_index, | |
1198 | struct packet_index, 1); | |
1199 | break; | |
1200 | default: | |
1201 | abort(); | |
1202 | break; | |
1203 | } | |
fb6b45aa JD |
1204 | |
1205 | if (viewer_stream->data_pending) { | |
1206 | lttng_index_to_packet_index(&viewer_stream->current_index, cur_index); | |
1207 | } else { | |
1208 | printf_verbose("get_next_index for stream %" PRIu64 "\n", viewer_stream->id); | |
1209 | ret = get_next_index(session->ctx, viewer_stream, cur_index, &stream_id); | |
1210 | if (ret < 0) { | |
1211 | pos->offset = EOF; | |
1212 | if (!lttng_live_should_quit()) { | |
1213 | fprintf(stderr, "[error] get_next_index failed\n"); | |
1214 | } | |
1215 | return; | |
e29395a8 | 1216 | } |
fb6b45aa JD |
1217 | printf_verbose("Index received : packet_size : %" PRIu64 |
1218 | ", offset %" PRIu64 ", content_size %" PRIu64 | |
1219 | ", timestamp_end : %" PRIu64 "\n", | |
1220 | cur_index->packet_size, cur_index->offset, | |
1221 | cur_index->content_size, | |
1222 | cur_index->ts_cycles.timestamp_end); | |
1223 | ||
1224 | } | |
1225 | ||
1226 | /* | |
1227 | * On the first time we receive an index, the stream_id needs to | |
1228 | * be set for the stream in order to use it, we don't want any | |
1229 | * data at this stage. | |
1230 | */ | |
1231 | if (file_stream->parent.stream_id == -1ULL) { | |
1232 | /* | |
1233 | * Warning: with lttng-tools < 2.4.2, the beacon does not | |
1234 | * contain the real stream ID, it is memset to 0, so this | |
1235 | * might create a problem when a session has multiple | |
1236 | * channels. We can't detect it at this stage, lttng-tools | |
1237 | * has to be upgraded to fix this problem. | |
1238 | */ | |
1239 | printf_verbose("Assigning stream_id %" PRIu64 "\n", | |
1240 | stream_id); | |
1241 | file_stream->parent.stream_id = stream_id; | |
1242 | viewer_stream->ctf_stream_id = stream_id; | |
1243 | ||
4a744367 JD |
1244 | return; |
1245 | } | |
1246 | ||
f1f52630 MD |
1247 | pos->packet_size = cur_index->packet_size; |
1248 | pos->content_size = cur_index->content_size; | |
4a744367 | 1249 | pos->mmap_base_offset = 0; |
f1f52630 | 1250 | if (cur_index->offset == EOF) { |
4a744367 JD |
1251 | pos->offset = EOF; |
1252 | } else { | |
1253 | pos->offset = 0; | |
1254 | } | |
1255 | ||
f1f52630 | 1256 | if (cur_index->content_size == 0) { |
fb6b45aa JD |
1257 | if (file_stream->parent.stream_class) { |
1258 | file_stream->parent.cycles_timestamp = | |
f1f52630 | 1259 | cur_index->ts_cycles.timestamp_end; |
fb6b45aa JD |
1260 | file_stream->parent.real_timestamp = ctf_get_real_timestamp( |
1261 | &file_stream->parent, | |
1262 | cur_index->ts_cycles.timestamp_end); | |
1263 | } | |
4a744367 | 1264 | } else { |
fb6b45aa JD |
1265 | if (file_stream->parent.stream_class) { |
1266 | /* Convert the timestamps and append to the real_index. */ | |
1267 | cur_index->ts_real.timestamp_begin = ctf_get_real_timestamp( | |
1268 | &file_stream->parent, | |
1269 | cur_index->ts_cycles.timestamp_begin); | |
1270 | cur_index->ts_real.timestamp_end = ctf_get_real_timestamp( | |
1271 | &file_stream->parent, | |
1272 | cur_index->ts_cycles.timestamp_end); | |
1273 | } | |
f1f52630 MD |
1274 | |
1275 | ctf_update_current_packet_index(&file_stream->parent, | |
1276 | prev_index, cur_index); | |
1277 | ||
1278 | file_stream->parent.cycles_timestamp = | |
1279 | cur_index->ts_cycles.timestamp_begin; | |
1280 | file_stream->parent.real_timestamp = | |
1281 | cur_index->ts_real.timestamp_begin; | |
4a744367 JD |
1282 | } |
1283 | ||
1284 | if (pos->packet_size == 0 || pos->offset == EOF) { | |
1285 | goto end; | |
1286 | } | |
1287 | ||
1288 | printf_verbose("get_data_packet for stream %" PRIu64 "\n", | |
1289 | viewer_stream->id); | |
1290 | ret = get_data_packet(session->ctx, pos, viewer_stream, | |
c1e8ac81 | 1291 | cur_index->offset, |
f1f52630 | 1292 | cur_index->packet_size / CHAR_BIT); |
4a744367 JD |
1293 | if (ret == -2) { |
1294 | goto retry; | |
1295 | } else if (ret < 0) { | |
1296 | pos->offset = EOF; | |
e29395a8 JG |
1297 | if (!lttng_live_should_quit()) { |
1298 | fprintf(stderr, "[error] get_data_packet failed\n"); | |
1299 | } | |
4a744367 JD |
1300 | return; |
1301 | } | |
fb6b45aa | 1302 | viewer_stream->data_pending = 0; |
4a744367 | 1303 | |
fb6b45aa | 1304 | read_packet_header(pos, file_stream); |
4a744367 JD |
1305 | |
1306 | end: | |
1307 | return; | |
1308 | } | |
1309 | ||
2acdc547 JD |
1310 | int lttng_live_create_viewer_session(struct lttng_live_ctx *ctx) |
1311 | { | |
1312 | struct lttng_viewer_cmd cmd; | |
1313 | struct lttng_viewer_create_session_response resp; | |
1314 | int ret; | |
1315 | ssize_t ret_len; | |
1316 | ||
8ace20bf MD |
1317 | if (lttng_live_should_quit()) { |
1318 | ret = -1; | |
1319 | goto end; | |
1320 | } | |
1321 | ||
2acdc547 JD |
1322 | cmd.cmd = htobe32(LTTNG_VIEWER_CREATE_SESSION); |
1323 | cmd.data_size = 0; | |
1324 | cmd.cmd_version = 0; | |
1325 | ||
b7e8a8e1 | 1326 | ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd)); |
2acdc547 | 1327 | if (ret_len < 0) { |
79620497 | 1328 | perror("[error] Error sending cmd"); |
2acdc547 JD |
1329 | goto error; |
1330 | } | |
1331 | assert(ret_len == sizeof(cmd)); | |
1332 | ||
b7e8a8e1 | 1333 | ret_len = lttng_live_recv(ctx->control_sock, &resp, sizeof(resp)); |
f8612f31 MD |
1334 | if (ret_len == 0) { |
1335 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
1336 | goto error; |
1337 | } | |
2acdc547 | 1338 | if (ret_len < 0) { |
79620497 | 1339 | perror("[error] Error receiving create session reply"); |
2acdc547 JD |
1340 | goto error; |
1341 | } | |
1342 | assert(ret_len == sizeof(resp)); | |
1343 | ||
1344 | if (be32toh(resp.status) != LTTNG_VIEWER_CREATE_SESSION_OK) { | |
1345 | fprintf(stderr, "[error] Error creating viewer session\n"); | |
2acdc547 JD |
1346 | goto error; |
1347 | } | |
1348 | ret = 0; | |
8ace20bf MD |
1349 | end: |
1350 | return ret; | |
2acdc547 JD |
1351 | |
1352 | error: | |
8ace20bf | 1353 | return -1; |
2acdc547 JD |
1354 | } |
1355 | ||
1356 | static | |
1357 | int del_traces(gpointer key, gpointer value, gpointer user_data) | |
4a744367 JD |
1358 | { |
1359 | struct bt_context *bt_ctx = user_data; | |
1360 | struct lttng_live_ctf_trace *trace = value; | |
1361 | int ret; | |
1362 | ||
1363 | ret = bt_context_remove_trace(bt_ctx, trace->trace_id); | |
1364 | if (ret < 0) | |
1365 | fprintf(stderr, "[error] removing trace from context\n"); | |
1366 | ||
1367 | /* remove the key/value pair from the HT. */ | |
1368 | return 1; | |
1369 | } | |
1370 | ||
2acdc547 | 1371 | static |
7840bb08 JD |
1372 | int add_one_trace(struct lttng_live_ctx *ctx, |
1373 | struct lttng_live_ctf_trace *trace) | |
4a744367 | 1374 | { |
9abca178 | 1375 | int i, ret; |
7840bb08 | 1376 | struct bt_context *bt_ctx = ctx->bt_ctx; |
4a744367 JD |
1377 | struct lttng_live_viewer_stream *stream; |
1378 | struct bt_mmap_stream *new_mmap_stream; | |
1379 | struct bt_mmap_stream_list mmap_list; | |
150595c4 JD |
1380 | struct bt_trace_descriptor *td; |
1381 | struct bt_trace_handle *handle; | |
4a744367 | 1382 | |
b5a1fa45 JD |
1383 | /* |
1384 | * We don't know how many streams we will receive for a trace, so | |
1385 | * once we are done receiving the traces, we add all the traces | |
1386 | * received to the bt_context. | |
1387 | * We can receive streams during the attach command or the | |
1388 | * get_new_streams, so we have to make sure not to add multiple | |
1389 | * times the same traces. | |
1390 | * If a trace is already in the context, we just skip this function. | |
1391 | */ | |
7840bb08 JD |
1392 | if (trace->in_use) { |
1393 | ret = 0; | |
1394 | goto end; | |
1395 | } | |
2acdc547 | 1396 | |
4a744367 JD |
1397 | BT_INIT_LIST_HEAD(&mmap_list.head); |
1398 | ||
1399 | for (i = 0; i < trace->streams->len; i++) { | |
1400 | stream = g_ptr_array_index(trace->streams, i); | |
4a744367 JD |
1401 | |
1402 | if (!stream->metadata_flag) { | |
1403 | new_mmap_stream = zmalloc(sizeof(struct bt_mmap_stream)); | |
1404 | new_mmap_stream->priv = (void *) stream; | |
1405 | new_mmap_stream->fd = -1; | |
1406 | bt_list_add(&new_mmap_stream->list, &mmap_list.head); | |
1407 | } else { | |
af701dc4 JD |
1408 | char *metadata_buf = NULL; |
1409 | ||
4a744367 | 1410 | /* Get all possible metadata before starting */ |
af701dc4 JD |
1411 | ret = get_new_metadata(ctx, stream, &metadata_buf); |
1412 | if (ret) { | |
1413 | free(metadata_buf); | |
1414 | goto end_free; | |
1415 | } | |
1416 | if (!stream->metadata_len) { | |
1417 | fprintf(stderr, "[error] empty metadata\n"); | |
1418 | ret = -1; | |
1419 | free(metadata_buf); | |
1420 | goto end_free; | |
1421 | } | |
1422 | ||
1423 | trace->metadata_fp = babeltrace_fmemopen(metadata_buf, | |
1424 | stream->metadata_len, "rb"); | |
1425 | if (!trace->metadata_fp) { | |
1426 | perror("Metadata fmemopen"); | |
1427 | ret = -1; | |
1428 | free(metadata_buf); | |
9abca178 | 1429 | goto end_free; |
af701dc4 | 1430 | } |
4a744367 JD |
1431 | } |
1432 | } | |
1433 | ||
1434 | if (!trace->metadata_fp) { | |
1435 | fprintf(stderr, "[error] No metadata stream opened\n"); | |
7840bb08 | 1436 | ret = -1; |
4a744367 JD |
1437 | goto end_free; |
1438 | } | |
1439 | ||
1440 | ret = bt_context_add_trace(bt_ctx, NULL, "ctf", | |
1441 | ctf_live_packet_seek, &mmap_list, trace->metadata_fp); | |
1442 | if (ret < 0) { | |
1443 | fprintf(stderr, "[error] Error adding trace\n"); | |
7840bb08 | 1444 | ret = -1; |
4a744367 JD |
1445 | goto end_free; |
1446 | } | |
af701dc4 JD |
1447 | trace->metadata_stream->metadata_len = 0; |
1448 | ||
150595c4 JD |
1449 | handle = (struct bt_trace_handle *) g_hash_table_lookup( |
1450 | bt_ctx->trace_handles, | |
1451 | (gpointer) (unsigned long) ret); | |
1452 | td = handle->td; | |
1453 | trace->handle = handle; | |
2acdc547 | 1454 | if (bt_ctx->current_iterator) { |
2acdc547 JD |
1455 | bt_iter_add_trace(bt_ctx->current_iterator, td); |
1456 | } | |
1457 | ||
4a744367 | 1458 | trace->trace_id = ret; |
2acdc547 | 1459 | trace->in_use = 1; |
4a744367 JD |
1460 | |
1461 | goto end; | |
1462 | ||
1463 | end_free: | |
1464 | bt_context_put(bt_ctx); | |
1465 | end: | |
7840bb08 JD |
1466 | return ret; |
1467 | } | |
1468 | ||
1469 | static | |
1470 | int add_traces(struct lttng_live_ctx *ctx) | |
1471 | { | |
1472 | int ret; | |
1473 | struct lttng_live_ctf_trace *trace; | |
1474 | GHashTableIter it; | |
1475 | gpointer key; | |
1476 | gpointer value; | |
1477 | ||
1478 | g_hash_table_iter_init(&it, ctx->session->ctf_traces); | |
1479 | while (g_hash_table_iter_next(&it, &key, &value)) { | |
1480 | trace = (struct lttng_live_ctf_trace *) value; | |
1481 | ret = add_one_trace(ctx, trace); | |
1482 | if (ret < 0) { | |
1483 | goto end; | |
1484 | } | |
1485 | } | |
1486 | ||
1487 | ret = 0; | |
1488 | ||
1489 | end: | |
1490 | return ret; | |
4a744367 JD |
1491 | } |
1492 | ||
73b2b0d1 JD |
1493 | /* |
1494 | * Request new streams for a session. | |
1495 | * Returns the number of streams received or a negative value on error. | |
1496 | */ | |
2acdc547 | 1497 | int lttng_live_get_new_streams(struct lttng_live_ctx *ctx, uint64_t id) |
6192b988 JD |
1498 | { |
1499 | struct lttng_viewer_cmd cmd; | |
2acdc547 JD |
1500 | struct lttng_viewer_new_streams_request rq; |
1501 | struct lttng_viewer_new_streams_response rp; | |
1502 | struct lttng_viewer_stream stream; | |
73b2b0d1 | 1503 | int ret, i, nb_streams = 0; |
6192b988 | 1504 | ssize_t ret_len; |
b5a1fa45 | 1505 | uint32_t stream_count; |
6192b988 | 1506 | |
8ace20bf MD |
1507 | if (lttng_live_should_quit()) { |
1508 | ret = -1; | |
1509 | goto end; | |
1510 | } | |
1511 | ||
2acdc547 JD |
1512 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_NEW_STREAMS); |
1513 | cmd.data_size = sizeof(rq); | |
6192b988 JD |
1514 | cmd.cmd_version = 0; |
1515 | ||
2acdc547 JD |
1516 | memset(&rq, 0, sizeof(rq)); |
1517 | rq.session_id = htobe64(id); | |
1518 | ||
b7e8a8e1 | 1519 | ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd)); |
6192b988 | 1520 | if (ret_len < 0) { |
79620497 | 1521 | perror("[error] Error sending cmd"); |
6192b988 JD |
1522 | goto error; |
1523 | } | |
1524 | assert(ret_len == sizeof(cmd)); | |
1525 | ||
b7e8a8e1 | 1526 | ret_len = lttng_live_send(ctx->control_sock, &rq, sizeof(rq)); |
6192b988 | 1527 | if (ret_len < 0) { |
79620497 | 1528 | perror("[error] Error sending get_new_streams request"); |
6192b988 JD |
1529 | goto error; |
1530 | } | |
2acdc547 | 1531 | assert(ret_len == sizeof(rq)); |
6192b988 | 1532 | |
b7e8a8e1 | 1533 | ret_len = lttng_live_recv(ctx->control_sock, &rp, sizeof(rp)); |
f8612f31 MD |
1534 | if (ret_len == 0) { |
1535 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
1536 | goto error; |
1537 | } | |
2acdc547 | 1538 | if (ret_len < 0) { |
79620497 | 1539 | perror("[error] Error receiving get_new_streams response"); |
6192b988 JD |
1540 | goto error; |
1541 | } | |
2acdc547 JD |
1542 | assert(ret_len == sizeof(rp)); |
1543 | ||
1544 | switch(be32toh(rp.status)) { | |
1545 | case LTTNG_VIEWER_NEW_STREAMS_OK: | |
1546 | break; | |
1547 | case LTTNG_VIEWER_NEW_STREAMS_NO_NEW: | |
1548 | ret = 0; | |
1549 | goto end; | |
1550 | case LTTNG_VIEWER_NEW_STREAMS_HUP: | |
1551 | ret = -LTTNG_VIEWER_NEW_STREAMS_HUP; | |
1552 | goto end; | |
1553 | case LTTNG_VIEWER_NEW_STREAMS_ERR: | |
1554 | fprintf(stderr, "[error] get_new_streams error\n"); | |
8ace20bf | 1555 | goto error; |
2acdc547 JD |
1556 | default: |
1557 | fprintf(stderr, "[error] Unknown return code %u\n", | |
1558 | be32toh(rp.status)); | |
8ace20bf | 1559 | goto error; |
2acdc547 JD |
1560 | } |
1561 | ||
b5a1fa45 JD |
1562 | stream_count = be32toh(rp.streams_count); |
1563 | ctx->session->stream_count += stream_count; | |
2acdc547 JD |
1564 | /* |
1565 | * When the session is created but not started, we do an active wait | |
1566 | * until it starts. It allows the viewer to start processing the trace | |
1567 | * as soon as the session starts. | |
1568 | */ | |
1569 | if (ctx->session->stream_count == 0) { | |
1570 | ret = 0; | |
1571 | goto end; | |
1572 | } | |
1573 | printf_verbose("Waiting for %" PRIu64 " streams:\n", | |
1574 | ctx->session->stream_count); | |
1575 | ctx->session->streams = g_new0(struct lttng_live_viewer_stream, | |
1576 | ctx->session->stream_count); | |
b5a1fa45 | 1577 | for (i = 0; i < stream_count; i++) { |
b7e8a8e1 | 1578 | ret_len = lttng_live_recv(ctx->control_sock, &stream, sizeof(stream)); |
f8612f31 MD |
1579 | if (ret_len == 0) { |
1580 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
1581 | goto error; |
1582 | } | |
2acdc547 | 1583 | if (ret_len < 0) { |
79620497 | 1584 | perror("[error] Error receiving stream"); |
2acdc547 JD |
1585 | goto error; |
1586 | } | |
1587 | assert(ret_len == sizeof(stream)); | |
1588 | stream.path_name[LTTNG_VIEWER_PATH_MAX - 1] = '\0'; | |
1589 | stream.channel_name[LTTNG_VIEWER_NAME_MAX - 1] = '\0'; | |
1590 | ||
1591 | printf_verbose(" stream %" PRIu64 " : %s/%s\n", | |
1592 | be64toh(stream.id), stream.path_name, | |
1593 | stream.channel_name); | |
1594 | ctx->session->streams[i].id = be64toh(stream.id); | |
1595 | ctx->session->streams[i].session = ctx->session; | |
1596 | ||
2acdc547 | 1597 | ctx->session->streams[i].mmap_size = 0; |
fb6b45aa | 1598 | ctx->session->streams[i].ctf_stream_id = -1ULL; |
2acdc547 JD |
1599 | |
1600 | if (be32toh(stream.metadata_flag)) { | |
2acdc547 | 1601 | ctx->session->streams[i].metadata_flag = 1; |
2acdc547 JD |
1602 | } |
1603 | ret = lttng_live_ctf_trace_assign(&ctx->session->streams[i], | |
1604 | be64toh(stream.ctf_trace_id)); | |
1605 | if (ret < 0) { | |
1606 | goto error; | |
1607 | } | |
73b2b0d1 | 1608 | nb_streams++; |
2acdc547 JD |
1609 | |
1610 | } | |
73b2b0d1 | 1611 | ret = nb_streams; |
2acdc547 | 1612 | end: |
6192b988 | 1613 | return ret; |
8ace20bf MD |
1614 | |
1615 | error: | |
1616 | return -1; | |
6192b988 JD |
1617 | } |
1618 | ||
28756729 | 1619 | int lttng_live_read(struct lttng_live_ctx *ctx) |
4a744367 | 1620 | { |
28756729 JG |
1621 | int ret = -1; |
1622 | int i; | |
4a744367 JD |
1623 | struct bt_ctf_iter *iter; |
1624 | const struct bt_ctf_event *event; | |
1625 | struct bt_iter_pos begin_pos; | |
1626 | struct bt_trace_descriptor *td_write; | |
1627 | struct bt_format *fmt_write; | |
1628 | struct ctf_text_stream_pos *sout; | |
2acdc547 | 1629 | uint64_t id; |
4a744367 | 1630 | |
2acdc547 JD |
1631 | ctx->bt_ctx = bt_context_create(); |
1632 | if (!ctx->bt_ctx) { | |
4a744367 JD |
1633 | fprintf(stderr, "[error] bt_context_create allocation\n"); |
1634 | goto end; | |
1635 | } | |
1636 | ||
1637 | fmt_write = bt_lookup_format(g_quark_from_static_string("text")); | |
1638 | if (!fmt_write) { | |
1639 | fprintf(stderr, "[error] ctf-text error\n"); | |
1640 | goto end; | |
1641 | } | |
1642 | ||
1643 | td_write = fmt_write->open_trace(NULL, O_RDWR, NULL, NULL); | |
1644 | if (!td_write) { | |
1645 | fprintf(stderr, "[error] Error opening output trace\n"); | |
1646 | goto end_free; | |
1647 | } | |
1648 | ||
1649 | sout = container_of(td_write, struct ctf_text_stream_pos, | |
1650 | trace_descriptor); | |
85bb4663 | 1651 | if (!sout->parent.event_cb) { |
4a744367 | 1652 | goto end_free; |
85bb4663 | 1653 | } |
4a744367 | 1654 | |
6192b988 JD |
1655 | ret = lttng_live_create_viewer_session(ctx); |
1656 | if (ret < 0) { | |
1657 | goto end_free; | |
1658 | } | |
1659 | ||
2acdc547 JD |
1660 | for (i = 0; i < ctx->session_ids->len; i++) { |
1661 | id = g_array_index(ctx->session_ids, uint64_t, i); | |
7e5e4176 | 1662 | printf_verbose("Attaching to session %" PRIu64 "\n", id); |
2acdc547 JD |
1663 | ret = lttng_live_attach_session(ctx, id); |
1664 | printf_verbose("Attaching session returns %d\n", ret); | |
1665 | if (ret < 0) { | |
1666 | if (ret == -LTTNG_VIEWER_ATTACH_UNK) { | |
1667 | fprintf(stderr, "[error] Unknown session ID\n"); | |
1668 | } | |
1669 | goto end_free; | |
1670 | } | |
1671 | } | |
1672 | ||
4a744367 | 1673 | /* |
2acdc547 | 1674 | * As long as the session is active, we try to get new streams. |
4a744367 | 1675 | */ |
2acdc547 | 1676 | for (;;) { |
4a744367 JD |
1677 | int flags; |
1678 | ||
8ace20bf | 1679 | if (lttng_live_should_quit()) { |
28756729 | 1680 | ret = 0; |
8ace20bf MD |
1681 | goto end_free; |
1682 | } | |
1683 | ||
2acdc547 | 1684 | while (!ctx->session->stream_count) { |
8ace20bf MD |
1685 | if (lttng_live_should_quit() |
1686 | || ctx->session_ids->len == 0) { | |
28756729 | 1687 | ret = 0; |
4a744367 | 1688 | goto end_free; |
85bb4663 | 1689 | } |
2acdc547 | 1690 | ret = ask_new_streams(ctx); |
85bb4663 | 1691 | if (ret < 0) { |
2acdc547 | 1692 | goto end_free; |
85bb4663 MD |
1693 | } |
1694 | if (!ctx->session->stream_count) { | |
85e2085e | 1695 | (void) poll(NULL, 0, ACTIVE_POLL_DELAY); |
85bb4663 | 1696 | } |
2acdc547 | 1697 | } |
4a744367 | 1698 | |
7840bb08 JD |
1699 | ret = add_traces(ctx); |
1700 | if (ret < 0) { | |
1701 | goto end_free; | |
1702 | } | |
4a744367 JD |
1703 | |
1704 | begin_pos.type = BT_SEEK_BEGIN; | |
2acdc547 | 1705 | iter = bt_ctf_iter_create(ctx->bt_ctx, &begin_pos, NULL); |
4a744367 | 1706 | if (!iter) { |
e29395a8 JG |
1707 | if (lttng_live_should_quit()) { |
1708 | ret = 0; | |
1709 | goto end; | |
1710 | } | |
4a744367 JD |
1711 | fprintf(stderr, "[error] Iterator creation error\n"); |
1712 | goto end; | |
1713 | } | |
1714 | for (;;) { | |
8ace20bf | 1715 | if (lttng_live_should_quit()) { |
28756729 | 1716 | ret = 0; |
8ace20bf MD |
1717 | goto end_free; |
1718 | } | |
4a744367 JD |
1719 | event = bt_ctf_iter_read_event_flags(iter, &flags); |
1720 | if (!(flags & BT_ITER_FLAG_RETRY)) { | |
1721 | if (!event) { | |
1722 | /* End of trace */ | |
1723 | break; | |
1724 | } | |
1725 | ret = sout->parent.event_cb(&sout->parent, | |
1726 | event->parent->stream); | |
1727 | if (ret) { | |
1728 | fprintf(stderr, "[error] Writing " | |
1729 | "event failed.\n"); | |
1730 | goto end_free; | |
1731 | } | |
1732 | } | |
1733 | ret = bt_iter_next(bt_ctf_get_iter(iter)); | |
1734 | if (ret < 0) { | |
1735 | goto end_free; | |
1736 | } | |
1737 | } | |
1738 | bt_ctf_iter_destroy(iter); | |
2acdc547 JD |
1739 | g_hash_table_foreach_remove(ctx->session->ctf_traces, |
1740 | del_traces, ctx->bt_ctx); | |
1741 | ctx->session->stream_count = 0; | |
1742 | } | |
4a744367 JD |
1743 | |
1744 | end_free: | |
2acdc547 | 1745 | bt_context_put(ctx->bt_ctx); |
4a744367 | 1746 | end: |
e29395a8 JG |
1747 | if (lttng_live_should_quit()) { |
1748 | ret = 0; | |
1749 | } | |
28756729 | 1750 | return ret; |
4a744367 | 1751 | } |