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); | |
7840bb08 | 72 | static int add_traces(struct lttng_live_ctx *ctx); |
2acdc547 | 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, | |
37307240 | 384 | &ctf_trace_id); |
4a744367 JD |
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, | |
37307240 | 390 | &trace->ctf_trace_id, |
4a744367 JD |
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 | 682 | if (ret_len != sizeof(rp)) { |
7e5e4176 MD |
683 | fprintf(stderr, "[error] get_data_packet: expected %zu" |
684 | ", received %zd\n", sizeof(rp), | |
a5e4b11e | 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 | 710 | ret = ask_new_streams(ctx); |
7840bb08 | 711 | if (ret < 0) { |
2acdc547 | 712 | goto error; |
7840bb08 JD |
713 | } else if (ret > 0) { |
714 | ret = add_traces(ctx); | |
715 | if (ret < 0) { | |
716 | goto error; | |
717 | } | |
718 | } | |
2acdc547 | 719 | } |
f312b3aa MD |
720 | if (rp.flags & (LTTNG_VIEWER_FLAG_NEW_METADATA |
721 | | LTTNG_VIEWER_FLAG_NEW_STREAM)) { | |
722 | goto retry; | |
723 | } | |
4a744367 | 724 | fprintf(stderr, "[error] get_data_packet: error\n"); |
8ace20bf | 725 | goto error; |
4a744367 JD |
726 | case LTTNG_VIEWER_GET_PACKET_EOF: |
727 | ret = -2; | |
8ace20bf | 728 | goto end; |
4a744367 JD |
729 | default: |
730 | printf_verbose("get_data_packet: unknown\n"); | |
8ace20bf | 731 | goto error; |
4a744367 JD |
732 | } |
733 | ||
65ae9a82 | 734 | if (len == 0) { |
96943040 | 735 | goto error; |
4a744367 JD |
736 | } |
737 | ||
738 | if (len > stream->mmap_size) { | |
739 | uint64_t new_size; | |
740 | ||
741 | new_size = max_t(uint64_t, len, stream->mmap_size << 1); | |
742 | if (pos->base_mma) { | |
743 | /* unmap old base */ | |
744 | ret = munmap_align(pos->base_mma); | |
745 | if (ret) { | |
79620497 | 746 | perror("[error] Unable to unmap old base"); |
4a744367 JD |
747 | goto error; |
748 | } | |
749 | pos->base_mma = NULL; | |
750 | } | |
751 | pos->base_mma = mmap_align(new_size, | |
752 | PROT_READ | PROT_WRITE, | |
753 | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); | |
754 | if (pos->base_mma == MAP_FAILED) { | |
79620497 | 755 | perror("[error] mmap error"); |
4a744367 | 756 | pos->base_mma = NULL; |
4a744367 JD |
757 | goto error; |
758 | } | |
759 | ||
760 | stream->mmap_size = new_size; | |
761 | printf_verbose("Expanding stream mmap size to %" PRIu64 " bytes\n", | |
762 | stream->mmap_size); | |
763 | } | |
764 | ||
b7e8a8e1 MD |
765 | ret_len = lttng_live_recv(ctx->control_sock, |
766 | mmap_align_addr(pos->base_mma), len); | |
f8612f31 MD |
767 | if (ret_len == 0) { |
768 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
769 | goto error; |
770 | } | |
4a744367 | 771 | if (ret_len < 0) { |
79620497 | 772 | perror("[error] Error receiving trace packet"); |
4a744367 JD |
773 | goto error; |
774 | } | |
775 | assert(ret_len == len); | |
f312b3aa | 776 | ret = 0; |
4a744367 | 777 | end: |
4a744367 | 778 | return ret; |
8ace20bf MD |
779 | |
780 | error: | |
781 | return -1; | |
4a744367 JD |
782 | } |
783 | ||
4a744367 | 784 | static |
9abca178 JD |
785 | int get_one_metadata_packet(struct lttng_live_ctx *ctx, |
786 | struct lttng_live_viewer_stream *metadata_stream) | |
4a744367 JD |
787 | { |
788 | uint64_t len = 0; | |
789 | int ret; | |
790 | struct lttng_viewer_cmd cmd; | |
791 | struct lttng_viewer_get_metadata rq; | |
792 | struct lttng_viewer_metadata_packet rp; | |
4a744367 JD |
793 | char *data = NULL; |
794 | ssize_t ret_len; | |
795 | ||
8ace20bf MD |
796 | if (lttng_live_should_quit()) { |
797 | ret = -1; | |
798 | goto end; | |
799 | } | |
800 | ||
9abca178 | 801 | rq.stream_id = htobe64(metadata_stream->id); |
4a744367 JD |
802 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_METADATA); |
803 | cmd.data_size = sizeof(rq); | |
804 | cmd.cmd_version = 0; | |
805 | ||
b7e8a8e1 | 806 | ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd)); |
4a744367 | 807 | if (ret_len < 0) { |
79620497 | 808 | perror("[error] Error sending cmd"); |
4a744367 JD |
809 | goto error; |
810 | } | |
811 | assert(ret_len == sizeof(cmd)); | |
812 | ||
b7e8a8e1 | 813 | ret_len = lttng_live_send(ctx->control_sock, &rq, sizeof(rq)); |
4a744367 | 814 | if (ret_len < 0) { |
79620497 | 815 | perror("[error] Error sending get_metadata request"); |
4a744367 JD |
816 | goto error; |
817 | } | |
818 | assert(ret_len == sizeof(rq)); | |
819 | ||
b7e8a8e1 | 820 | ret_len = lttng_live_recv(ctx->control_sock, &rp, sizeof(rp)); |
f8612f31 MD |
821 | if (ret_len == 0) { |
822 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
823 | goto error; |
824 | } | |
4a744367 | 825 | if (ret_len < 0) { |
79620497 | 826 | perror("[error] Error receiving metadata response"); |
4a744367 JD |
827 | goto error; |
828 | } | |
829 | assert(ret_len == sizeof(rp)); | |
830 | ||
831 | switch (be32toh(rp.status)) { | |
832 | case LTTNG_VIEWER_METADATA_OK: | |
833 | printf_verbose("get_metadata : OK\n"); | |
834 | break; | |
835 | case LTTNG_VIEWER_NO_NEW_METADATA: | |
836 | printf_verbose("get_metadata : NO NEW\n"); | |
9abca178 | 837 | ret = 0; |
4a744367 JD |
838 | goto end; |
839 | case LTTNG_VIEWER_METADATA_ERR: | |
840 | printf_verbose("get_metadata : ERR\n"); | |
8ace20bf | 841 | goto error; |
4a744367 JD |
842 | default: |
843 | printf_verbose("get_metadata : UNKNOWN\n"); | |
8ace20bf | 844 | goto error; |
4a744367 JD |
845 | } |
846 | ||
847 | len = be64toh(rp.len); | |
848 | printf_verbose("Writing %" PRIu64" bytes to metadata\n", len); | |
849 | if (len <= 0) { | |
8ace20bf | 850 | goto error; |
4a744367 JD |
851 | } |
852 | ||
853 | data = zmalloc(len); | |
854 | if (!data) { | |
855 | perror("relay data zmalloc"); | |
4a744367 JD |
856 | goto error; |
857 | } | |
b7e8a8e1 | 858 | ret_len = lttng_live_recv(ctx->control_sock, data, len); |
f8612f31 MD |
859 | if (ret_len == 0) { |
860 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
8ace20bf | 861 | goto error_free_data; |
f8612f31 | 862 | } |
4a744367 | 863 | if (ret_len < 0) { |
79620497 | 864 | perror("[error] Error receiving trace packet"); |
8ace20bf | 865 | goto error_free_data; |
4a744367 JD |
866 | } |
867 | assert(ret_len == len); | |
868 | ||
869 | do { | |
af701dc4 JD |
870 | ret_len = fwrite(data, 1, len, |
871 | metadata_stream->metadata_fp_write); | |
4a744367 JD |
872 | } while (ret_len < 0 && errno == EINTR); |
873 | if (ret_len < 0) { | |
af701dc4 | 874 | fprintf(stderr, "[error] Writing in the metadata fp\n"); |
8ace20bf | 875 | goto error_free_data; |
4a744367 JD |
876 | } |
877 | assert(ret_len == len); | |
af701dc4 | 878 | metadata_stream->metadata_len += len; |
8ace20bf | 879 | free(data); |
9abca178 | 880 | ret = len; |
8ace20bf MD |
881 | end: |
882 | return ret; | |
4a744367 | 883 | |
8ace20bf | 884 | error_free_data: |
4a744367 | 885 | free(data); |
4a744367 | 886 | error: |
8ace20bf | 887 | return -1; |
4a744367 JD |
888 | } |
889 | ||
9abca178 JD |
890 | /* |
891 | * Return 0 on success, a negative value on error. | |
892 | */ | |
893 | static | |
894 | int get_new_metadata(struct lttng_live_ctx *ctx, | |
af701dc4 JD |
895 | struct lttng_live_viewer_stream *viewer_stream, |
896 | char **metadata_buf) | |
9abca178 JD |
897 | { |
898 | int ret = 0; | |
899 | struct lttng_live_viewer_stream *metadata_stream; | |
73b2b0d1 | 900 | size_t size, len_read = 0; |
9abca178 JD |
901 | |
902 | metadata_stream = viewer_stream->ctf_trace->metadata_stream; | |
50d207af JD |
903 | if (!metadata_stream) { |
904 | fprintf(stderr, "[error] No metadata stream\n"); | |
905 | ret = -1; | |
906 | goto error; | |
907 | } | |
af701dc4 JD |
908 | metadata_stream->metadata_len = 0; |
909 | ret = open_metadata_fp_write(metadata_stream, metadata_buf, &size); | |
910 | if (ret < 0) { | |
911 | goto error; | |
912 | } | |
9abca178 JD |
913 | |
914 | do { | |
d1694e41 JD |
915 | if (lttng_live_should_quit()) { |
916 | ret = -1; | |
917 | goto error; | |
918 | } | |
9abca178 JD |
919 | /* |
920 | * get_one_metadata_packet returns the number of bytes | |
921 | * received, 0 when we have received everything, a | |
922 | * negative value on error. | |
923 | */ | |
924 | ret = get_one_metadata_packet(ctx, metadata_stream); | |
c111d5d7 MD |
925 | if (ret > 0) { |
926 | len_read += ret; | |
927 | } | |
85e2085e MD |
928 | if (!len_read) { |
929 | (void) poll(NULL, 0, ACTIVE_POLL_DELAY); | |
930 | } | |
c111d5d7 | 931 | } while (ret > 0 || !len_read); |
9abca178 | 932 | |
7def295f MD |
933 | if (fclose(metadata_stream->metadata_fp_write)) |
934 | perror("fclose"); | |
af701dc4 JD |
935 | metadata_stream->metadata_fp_write = NULL; |
936 | ||
937 | error: | |
9abca178 JD |
938 | return ret; |
939 | } | |
940 | ||
fb6b45aa JD |
941 | /* |
942 | * Assign the fields from a lttng_viewer_index to a packet_index. | |
943 | */ | |
944 | static | |
945 | void lttng_index_to_packet_index(struct lttng_viewer_index *lindex, | |
946 | struct packet_index *pindex) | |
947 | { | |
948 | assert(lindex); | |
949 | assert(pindex); | |
950 | ||
951 | pindex->offset = be64toh(lindex->offset); | |
952 | pindex->packet_size = be64toh(lindex->packet_size); | |
953 | pindex->content_size = be64toh(lindex->content_size); | |
954 | pindex->ts_cycles.timestamp_begin = be64toh(lindex->timestamp_begin); | |
955 | pindex->ts_cycles.timestamp_end = be64toh(lindex->timestamp_end); | |
956 | pindex->events_discarded = be64toh(lindex->events_discarded); | |
957 | } | |
958 | ||
4a744367 JD |
959 | /* |
960 | * Get one index for a stream. | |
961 | * | |
962 | * Returns 0 on success or a negative value on error. | |
963 | */ | |
964 | static | |
965 | int get_next_index(struct lttng_live_ctx *ctx, | |
966 | struct lttng_live_viewer_stream *viewer_stream, | |
fb6b45aa | 967 | struct packet_index *index, uint64_t *stream_id) |
4a744367 JD |
968 | { |
969 | struct lttng_viewer_cmd cmd; | |
970 | struct lttng_viewer_get_next_index rq; | |
4a744367 | 971 | int ret; |
4a744367 | 972 | ssize_t ret_len; |
fb6b45aa | 973 | struct lttng_viewer_index *rp = &viewer_stream->current_index; |
4a744367 JD |
974 | |
975 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_NEXT_INDEX); | |
976 | cmd.data_size = sizeof(rq); | |
977 | cmd.cmd_version = 0; | |
978 | ||
979 | memset(&rq, 0, sizeof(rq)); | |
980 | rq.stream_id = htobe64(viewer_stream->id); | |
981 | ||
982 | retry: | |
8ace20bf MD |
983 | if (lttng_live_should_quit()) { |
984 | ret = -1; | |
985 | goto end; | |
986 | } | |
b7e8a8e1 | 987 | ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd)); |
4a744367 | 988 | if (ret_len < 0) { |
79620497 | 989 | perror("[error] Error sending cmd"); |
4a744367 JD |
990 | goto error; |
991 | } | |
992 | assert(ret_len == sizeof(cmd)); | |
993 | ||
b7e8a8e1 | 994 | ret_len = lttng_live_send(ctx->control_sock, &rq, sizeof(rq)); |
4a744367 | 995 | if (ret_len < 0) { |
79620497 | 996 | perror("[error] Error sending get_next_index request"); |
4a744367 JD |
997 | goto error; |
998 | } | |
999 | assert(ret_len == sizeof(rq)); | |
1000 | ||
fb6b45aa | 1001 | ret_len = lttng_live_recv(ctx->control_sock, rp, sizeof(*rp)); |
f8612f31 MD |
1002 | if (ret_len == 0) { |
1003 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
1004 | goto error; |
1005 | } | |
4a744367 | 1006 | if (ret_len < 0) { |
79620497 | 1007 | perror("[error] Error receiving index response"); |
4a744367 JD |
1008 | goto error; |
1009 | } | |
fb6b45aa | 1010 | assert(ret_len == sizeof(*rp)); |
4a744367 | 1011 | |
fb6b45aa | 1012 | rp->flags = be32toh(rp->flags); |
4a744367 | 1013 | |
fb6b45aa | 1014 | switch (be32toh(rp->status)) { |
4a744367 JD |
1015 | case LTTNG_VIEWER_INDEX_INACTIVE: |
1016 | printf_verbose("get_next_index: inactive\n"); | |
1017 | memset(index, 0, sizeof(struct packet_index)); | |
fb6b45aa JD |
1018 | index->ts_cycles.timestamp_end = be64toh(rp->timestamp_end); |
1019 | *stream_id = be64toh(rp->stream_id); | |
4a744367 JD |
1020 | break; |
1021 | case LTTNG_VIEWER_INDEX_OK: | |
1022 | printf_verbose("get_next_index: Ok, need metadata update : %u\n", | |
fb6b45aa JD |
1023 | rp->flags & LTTNG_VIEWER_FLAG_NEW_METADATA); |
1024 | lttng_index_to_packet_index(rp, index); | |
1025 | *stream_id = be64toh(rp->stream_id); | |
1026 | viewer_stream->data_pending = 1; | |
4a744367 | 1027 | |
fb6b45aa | 1028 | if (rp->flags & LTTNG_VIEWER_FLAG_NEW_METADATA) { |
50d207af JD |
1029 | ret = append_metadata(ctx, viewer_stream); |
1030 | if (ret) | |
4a744367 | 1031 | goto error; |
4a744367 | 1032 | } |
fb6b45aa | 1033 | if (rp->flags & LTTNG_VIEWER_FLAG_NEW_STREAM) { |
73b2b0d1 | 1034 | printf_verbose("get_next_index: need new streams\n"); |
2acdc547 | 1035 | ret = ask_new_streams(ctx); |
7840bb08 | 1036 | if (ret < 0) { |
2acdc547 | 1037 | goto error; |
7840bb08 JD |
1038 | } else if (ret > 0) { |
1039 | ret = add_traces(ctx); | |
1040 | if (ret < 0) { | |
1041 | goto error; | |
1042 | } | |
1043 | } | |
2acdc547 | 1044 | } |
4a744367 JD |
1045 | break; |
1046 | case LTTNG_VIEWER_INDEX_RETRY: | |
1047 | printf_verbose("get_next_index: retry\n"); | |
85e2085e | 1048 | (void) poll(NULL, 0, ACTIVE_POLL_DELAY); |
4a744367 JD |
1049 | goto retry; |
1050 | case LTTNG_VIEWER_INDEX_HUP: | |
1051 | printf_verbose("get_next_index: stream hung up\n"); | |
1052 | viewer_stream->id = -1ULL; | |
4a744367 | 1053 | index->offset = EOF; |
2acdc547 | 1054 | ctx->session->stream_count--; |
4a744367 JD |
1055 | break; |
1056 | case LTTNG_VIEWER_INDEX_ERR: | |
1057 | fprintf(stderr, "[error] get_next_index: error\n"); | |
4a744367 JD |
1058 | goto error; |
1059 | default: | |
1060 | fprintf(stderr, "[error] get_next_index: unkwown value\n"); | |
4a744367 JD |
1061 | goto error; |
1062 | } | |
4a744367 | 1063 | ret = 0; |
8ace20bf MD |
1064 | end: |
1065 | return ret; | |
4a744367 JD |
1066 | |
1067 | error: | |
8ace20bf | 1068 | return -1; |
4a744367 JD |
1069 | } |
1070 | ||
fb6b45aa JD |
1071 | static |
1072 | void read_packet_header(struct ctf_stream_pos *pos, | |
1073 | struct ctf_file_stream *file_stream) | |
1074 | { | |
1075 | int ret; | |
1076 | ||
1077 | /* update trace_packet_header and stream_packet_context */ | |
fcf10417 JG |
1078 | if (!(pos->prot & PROT_WRITE) && |
1079 | file_stream->parent.trace_packet_header) { | |
fb6b45aa JD |
1080 | /* Read packet header */ |
1081 | ret = generic_rw(&pos->parent, | |
1082 | &file_stream->parent.trace_packet_header->p); | |
1083 | if (ret) { | |
1084 | pos->offset = EOF; | |
1085 | fprintf(stderr, "[error] trace packet " | |
1086 | "header read failed\n"); | |
1087 | goto end; | |
1088 | } | |
1089 | } | |
fcf10417 JG |
1090 | if (!(pos->prot & PROT_WRITE) && |
1091 | file_stream->parent.stream_packet_context) { | |
fb6b45aa JD |
1092 | /* Read packet context */ |
1093 | ret = generic_rw(&pos->parent, | |
1094 | &file_stream->parent.stream_packet_context->p); | |
1095 | if (ret) { | |
1096 | pos->offset = EOF; | |
1097 | fprintf(stderr, "[error] stream packet " | |
1098 | "context read failed\n"); | |
1099 | goto end; | |
1100 | } | |
1101 | } | |
1102 | pos->data_offset = pos->offset; | |
1103 | ||
1104 | end: | |
1105 | return; | |
1106 | } | |
1107 | ||
1108 | /* | |
1109 | * Handle the seek parameters. | |
1110 | * Returns 0 if the packet_seek can continue, a positive value to | |
1111 | * cleanly exit the packet_seek, a negative value on error. | |
1112 | */ | |
1113 | static | |
1114 | int handle_seek_position(size_t index, int whence, | |
1115 | struct lttng_live_viewer_stream *viewer_stream, | |
1116 | struct ctf_stream_pos *pos, | |
1117 | struct ctf_file_stream *file_stream) | |
1118 | { | |
1119 | int ret; | |
1120 | ||
1121 | switch (whence) { | |
1122 | case SEEK_CUR: | |
1123 | ret = 0; | |
1124 | goto end; | |
1125 | case SEEK_SET: | |
1126 | /* | |
1127 | * We only allow to seek to 0. | |
1128 | */ | |
1129 | if (index != 0) { | |
1130 | fprintf(stderr, "[error] Arbitrary seek in lttng-live " | |
1131 | "trace not supported\n"); | |
1132 | pos->offset = EOF; | |
1133 | ret = -1; | |
1134 | goto end; | |
1135 | } | |
1136 | ||
1137 | ret = 0; | |
1138 | goto end; | |
1139 | ||
1140 | default: | |
1141 | fprintf(stderr, "[error] Invalid seek parameter\n"); | |
1142 | assert(0); | |
1143 | } | |
1144 | ||
1145 | end: | |
1146 | return ret; | |
1147 | } | |
1148 | ||
b5a1fa45 | 1149 | static |
4a744367 JD |
1150 | void ctf_live_packet_seek(struct bt_stream_pos *stream_pos, size_t index, |
1151 | int whence) | |
1152 | { | |
1153 | struct ctf_stream_pos *pos; | |
1154 | struct ctf_file_stream *file_stream; | |
f1f52630 | 1155 | struct packet_index *prev_index = NULL, *cur_index; |
4a744367 JD |
1156 | struct lttng_live_viewer_stream *viewer_stream; |
1157 | struct lttng_live_session *session; | |
fb6b45aa | 1158 | uint64_t stream_id = -1ULL; |
4a744367 JD |
1159 | int ret; |
1160 | ||
4a744367 JD |
1161 | pos = ctf_pos(stream_pos); |
1162 | file_stream = container_of(pos, struct ctf_file_stream, pos); | |
1163 | viewer_stream = (struct lttng_live_viewer_stream *) pos->priv; | |
1164 | session = viewer_stream->session; | |
1165 | ||
fb6b45aa JD |
1166 | ret = handle_seek_position(index, whence, viewer_stream, pos, |
1167 | file_stream); | |
1168 | if (ret != 0) { | |
1169 | return; | |
1170 | } | |
1171 | ||
1172 | retry: | |
f1f52630 MD |
1173 | switch (pos->packet_index->len) { |
1174 | case 0: | |
1175 | g_array_set_size(pos->packet_index, 1); | |
1176 | cur_index = &g_array_index(pos->packet_index, | |
1177 | struct packet_index, 0); | |
1178 | break; | |
1179 | case 1: | |
1180 | g_array_set_size(pos->packet_index, 2); | |
1181 | prev_index = &g_array_index(pos->packet_index, | |
1182 | struct packet_index, 0); | |
1183 | cur_index = &g_array_index(pos->packet_index, | |
1184 | struct packet_index, 1); | |
1185 | break; | |
1186 | case 2: | |
1187 | g_array_index(pos->packet_index, | |
1188 | struct packet_index, 0) = | |
1189 | g_array_index(pos->packet_index, | |
1190 | struct packet_index, 1); | |
1191 | prev_index = &g_array_index(pos->packet_index, | |
1192 | struct packet_index, 0); | |
1193 | cur_index = &g_array_index(pos->packet_index, | |
1194 | struct packet_index, 1); | |
1195 | break; | |
1196 | default: | |
1197 | abort(); | |
1198 | break; | |
1199 | } | |
fb6b45aa JD |
1200 | |
1201 | if (viewer_stream->data_pending) { | |
1202 | lttng_index_to_packet_index(&viewer_stream->current_index, cur_index); | |
1203 | } else { | |
1204 | printf_verbose("get_next_index for stream %" PRIu64 "\n", viewer_stream->id); | |
1205 | ret = get_next_index(session->ctx, viewer_stream, cur_index, &stream_id); | |
1206 | if (ret < 0) { | |
1207 | pos->offset = EOF; | |
1208 | if (!lttng_live_should_quit()) { | |
1209 | fprintf(stderr, "[error] get_next_index failed\n"); | |
1210 | } | |
1211 | return; | |
e29395a8 | 1212 | } |
fb6b45aa JD |
1213 | printf_verbose("Index received : packet_size : %" PRIu64 |
1214 | ", offset %" PRIu64 ", content_size %" PRIu64 | |
1215 | ", timestamp_end : %" PRIu64 "\n", | |
1216 | cur_index->packet_size, cur_index->offset, | |
1217 | cur_index->content_size, | |
1218 | cur_index->ts_cycles.timestamp_end); | |
1219 | ||
1220 | } | |
1221 | ||
1222 | /* | |
1223 | * On the first time we receive an index, the stream_id needs to | |
1224 | * be set for the stream in order to use it, we don't want any | |
1225 | * data at this stage. | |
1226 | */ | |
1227 | if (file_stream->parent.stream_id == -1ULL) { | |
1228 | /* | |
1229 | * Warning: with lttng-tools < 2.4.2, the beacon does not | |
1230 | * contain the real stream ID, it is memset to 0, so this | |
1231 | * might create a problem when a session has multiple | |
1232 | * channels. We can't detect it at this stage, lttng-tools | |
1233 | * has to be upgraded to fix this problem. | |
1234 | */ | |
1235 | printf_verbose("Assigning stream_id %" PRIu64 "\n", | |
1236 | stream_id); | |
1237 | file_stream->parent.stream_id = stream_id; | |
1238 | viewer_stream->ctf_stream_id = stream_id; | |
1239 | ||
4a744367 JD |
1240 | return; |
1241 | } | |
1242 | ||
f1f52630 MD |
1243 | pos->packet_size = cur_index->packet_size; |
1244 | pos->content_size = cur_index->content_size; | |
4a744367 | 1245 | pos->mmap_base_offset = 0; |
f1f52630 | 1246 | if (cur_index->offset == EOF) { |
4a744367 JD |
1247 | pos->offset = EOF; |
1248 | } else { | |
1249 | pos->offset = 0; | |
1250 | } | |
1251 | ||
f1f52630 | 1252 | if (cur_index->content_size == 0) { |
fb6b45aa JD |
1253 | if (file_stream->parent.stream_class) { |
1254 | file_stream->parent.cycles_timestamp = | |
f1f52630 | 1255 | cur_index->ts_cycles.timestamp_end; |
fb6b45aa JD |
1256 | file_stream->parent.real_timestamp = ctf_get_real_timestamp( |
1257 | &file_stream->parent, | |
1258 | cur_index->ts_cycles.timestamp_end); | |
1259 | } | |
4a744367 | 1260 | } else { |
fb6b45aa JD |
1261 | if (file_stream->parent.stream_class) { |
1262 | /* Convert the timestamps and append to the real_index. */ | |
1263 | cur_index->ts_real.timestamp_begin = ctf_get_real_timestamp( | |
1264 | &file_stream->parent, | |
1265 | cur_index->ts_cycles.timestamp_begin); | |
1266 | cur_index->ts_real.timestamp_end = ctf_get_real_timestamp( | |
1267 | &file_stream->parent, | |
1268 | cur_index->ts_cycles.timestamp_end); | |
1269 | } | |
f1f52630 MD |
1270 | |
1271 | ctf_update_current_packet_index(&file_stream->parent, | |
1272 | prev_index, cur_index); | |
1273 | ||
1274 | file_stream->parent.cycles_timestamp = | |
1275 | cur_index->ts_cycles.timestamp_begin; | |
1276 | file_stream->parent.real_timestamp = | |
1277 | cur_index->ts_real.timestamp_begin; | |
4a744367 JD |
1278 | } |
1279 | ||
1280 | if (pos->packet_size == 0 || pos->offset == EOF) { | |
1281 | goto end; | |
1282 | } | |
1283 | ||
1284 | printf_verbose("get_data_packet for stream %" PRIu64 "\n", | |
1285 | viewer_stream->id); | |
1286 | ret = get_data_packet(session->ctx, pos, viewer_stream, | |
c1e8ac81 | 1287 | cur_index->offset, |
f1f52630 | 1288 | cur_index->packet_size / CHAR_BIT); |
4a744367 JD |
1289 | if (ret == -2) { |
1290 | goto retry; | |
1291 | } else if (ret < 0) { | |
1292 | pos->offset = EOF; | |
e29395a8 JG |
1293 | if (!lttng_live_should_quit()) { |
1294 | fprintf(stderr, "[error] get_data_packet failed\n"); | |
1295 | } | |
4a744367 JD |
1296 | return; |
1297 | } | |
fb6b45aa | 1298 | viewer_stream->data_pending = 0; |
4a744367 | 1299 | |
fb6b45aa | 1300 | read_packet_header(pos, file_stream); |
4a744367 JD |
1301 | |
1302 | end: | |
1303 | return; | |
1304 | } | |
1305 | ||
2acdc547 JD |
1306 | int lttng_live_create_viewer_session(struct lttng_live_ctx *ctx) |
1307 | { | |
1308 | struct lttng_viewer_cmd cmd; | |
1309 | struct lttng_viewer_create_session_response resp; | |
1310 | int ret; | |
1311 | ssize_t ret_len; | |
1312 | ||
8ace20bf MD |
1313 | if (lttng_live_should_quit()) { |
1314 | ret = -1; | |
1315 | goto end; | |
1316 | } | |
1317 | ||
2acdc547 JD |
1318 | cmd.cmd = htobe32(LTTNG_VIEWER_CREATE_SESSION); |
1319 | cmd.data_size = 0; | |
1320 | cmd.cmd_version = 0; | |
1321 | ||
b7e8a8e1 | 1322 | ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd)); |
2acdc547 | 1323 | if (ret_len < 0) { |
79620497 | 1324 | perror("[error] Error sending cmd"); |
2acdc547 JD |
1325 | goto error; |
1326 | } | |
1327 | assert(ret_len == sizeof(cmd)); | |
1328 | ||
b7e8a8e1 | 1329 | ret_len = lttng_live_recv(ctx->control_sock, &resp, sizeof(resp)); |
f8612f31 MD |
1330 | if (ret_len == 0) { |
1331 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
1332 | goto error; |
1333 | } | |
2acdc547 | 1334 | if (ret_len < 0) { |
79620497 | 1335 | perror("[error] Error receiving create session reply"); |
2acdc547 JD |
1336 | goto error; |
1337 | } | |
1338 | assert(ret_len == sizeof(resp)); | |
1339 | ||
1340 | if (be32toh(resp.status) != LTTNG_VIEWER_CREATE_SESSION_OK) { | |
1341 | fprintf(stderr, "[error] Error creating viewer session\n"); | |
2acdc547 JD |
1342 | goto error; |
1343 | } | |
1344 | ret = 0; | |
8ace20bf MD |
1345 | end: |
1346 | return ret; | |
2acdc547 JD |
1347 | |
1348 | error: | |
8ace20bf | 1349 | return -1; |
2acdc547 JD |
1350 | } |
1351 | ||
1352 | static | |
1353 | int del_traces(gpointer key, gpointer value, gpointer user_data) | |
4a744367 JD |
1354 | { |
1355 | struct bt_context *bt_ctx = user_data; | |
1356 | struct lttng_live_ctf_trace *trace = value; | |
1357 | int ret; | |
1358 | ||
1359 | ret = bt_context_remove_trace(bt_ctx, trace->trace_id); | |
1360 | if (ret < 0) | |
1361 | fprintf(stderr, "[error] removing trace from context\n"); | |
1362 | ||
1363 | /* remove the key/value pair from the HT. */ | |
1364 | return 1; | |
1365 | } | |
1366 | ||
2acdc547 | 1367 | static |
7840bb08 JD |
1368 | int add_one_trace(struct lttng_live_ctx *ctx, |
1369 | struct lttng_live_ctf_trace *trace) | |
4a744367 | 1370 | { |
9abca178 | 1371 | int i, ret; |
7840bb08 | 1372 | struct bt_context *bt_ctx = ctx->bt_ctx; |
4a744367 JD |
1373 | struct lttng_live_viewer_stream *stream; |
1374 | struct bt_mmap_stream *new_mmap_stream; | |
1375 | struct bt_mmap_stream_list mmap_list; | |
150595c4 JD |
1376 | struct bt_trace_descriptor *td; |
1377 | struct bt_trace_handle *handle; | |
4a744367 | 1378 | |
b5a1fa45 JD |
1379 | /* |
1380 | * We don't know how many streams we will receive for a trace, so | |
1381 | * once we are done receiving the traces, we add all the traces | |
1382 | * received to the bt_context. | |
1383 | * We can receive streams during the attach command or the | |
1384 | * get_new_streams, so we have to make sure not to add multiple | |
1385 | * times the same traces. | |
1386 | * If a trace is already in the context, we just skip this function. | |
1387 | */ | |
7840bb08 JD |
1388 | if (trace->in_use) { |
1389 | ret = 0; | |
1390 | goto end; | |
1391 | } | |
2acdc547 | 1392 | |
4a744367 JD |
1393 | BT_INIT_LIST_HEAD(&mmap_list.head); |
1394 | ||
1395 | for (i = 0; i < trace->streams->len; i++) { | |
1396 | stream = g_ptr_array_index(trace->streams, i); | |
4a744367 JD |
1397 | |
1398 | if (!stream->metadata_flag) { | |
1399 | new_mmap_stream = zmalloc(sizeof(struct bt_mmap_stream)); | |
1400 | new_mmap_stream->priv = (void *) stream; | |
1401 | new_mmap_stream->fd = -1; | |
1402 | bt_list_add(&new_mmap_stream->list, &mmap_list.head); | |
1403 | } else { | |
af701dc4 JD |
1404 | char *metadata_buf = NULL; |
1405 | ||
4a744367 | 1406 | /* Get all possible metadata before starting */ |
af701dc4 JD |
1407 | ret = get_new_metadata(ctx, stream, &metadata_buf); |
1408 | if (ret) { | |
1409 | free(metadata_buf); | |
1410 | goto end_free; | |
1411 | } | |
1412 | if (!stream->metadata_len) { | |
1413 | fprintf(stderr, "[error] empty metadata\n"); | |
1414 | ret = -1; | |
1415 | free(metadata_buf); | |
1416 | goto end_free; | |
1417 | } | |
1418 | ||
1419 | trace->metadata_fp = babeltrace_fmemopen(metadata_buf, | |
1420 | stream->metadata_len, "rb"); | |
1421 | if (!trace->metadata_fp) { | |
1422 | perror("Metadata fmemopen"); | |
1423 | ret = -1; | |
1424 | free(metadata_buf); | |
9abca178 | 1425 | goto end_free; |
af701dc4 | 1426 | } |
4a744367 JD |
1427 | } |
1428 | } | |
1429 | ||
1430 | if (!trace->metadata_fp) { | |
1431 | fprintf(stderr, "[error] No metadata stream opened\n"); | |
7840bb08 | 1432 | ret = -1; |
4a744367 JD |
1433 | goto end_free; |
1434 | } | |
1435 | ||
1436 | ret = bt_context_add_trace(bt_ctx, NULL, "ctf", | |
1437 | ctf_live_packet_seek, &mmap_list, trace->metadata_fp); | |
1438 | if (ret < 0) { | |
1439 | fprintf(stderr, "[error] Error adding trace\n"); | |
7840bb08 | 1440 | ret = -1; |
4a744367 JD |
1441 | goto end_free; |
1442 | } | |
af701dc4 JD |
1443 | trace->metadata_stream->metadata_len = 0; |
1444 | ||
150595c4 JD |
1445 | handle = (struct bt_trace_handle *) g_hash_table_lookup( |
1446 | bt_ctx->trace_handles, | |
1447 | (gpointer) (unsigned long) ret); | |
1448 | td = handle->td; | |
1449 | trace->handle = handle; | |
2acdc547 | 1450 | if (bt_ctx->current_iterator) { |
2acdc547 JD |
1451 | bt_iter_add_trace(bt_ctx->current_iterator, td); |
1452 | } | |
1453 | ||
4a744367 | 1454 | trace->trace_id = ret; |
2acdc547 | 1455 | trace->in_use = 1; |
4a744367 JD |
1456 | |
1457 | goto end; | |
1458 | ||
1459 | end_free: | |
1460 | bt_context_put(bt_ctx); | |
1461 | end: | |
7840bb08 JD |
1462 | return ret; |
1463 | } | |
1464 | ||
1465 | static | |
1466 | int add_traces(struct lttng_live_ctx *ctx) | |
1467 | { | |
1468 | int ret; | |
1469 | struct lttng_live_ctf_trace *trace; | |
1470 | GHashTableIter it; | |
1471 | gpointer key; | |
1472 | gpointer value; | |
1473 | ||
1474 | g_hash_table_iter_init(&it, ctx->session->ctf_traces); | |
1475 | while (g_hash_table_iter_next(&it, &key, &value)) { | |
1476 | trace = (struct lttng_live_ctf_trace *) value; | |
1477 | ret = add_one_trace(ctx, trace); | |
1478 | if (ret < 0) { | |
1479 | goto end; | |
1480 | } | |
1481 | } | |
1482 | ||
1483 | ret = 0; | |
1484 | ||
1485 | end: | |
1486 | return ret; | |
4a744367 JD |
1487 | } |
1488 | ||
73b2b0d1 JD |
1489 | /* |
1490 | * Request new streams for a session. | |
1491 | * Returns the number of streams received or a negative value on error. | |
1492 | */ | |
2acdc547 | 1493 | int lttng_live_get_new_streams(struct lttng_live_ctx *ctx, uint64_t id) |
6192b988 JD |
1494 | { |
1495 | struct lttng_viewer_cmd cmd; | |
2acdc547 JD |
1496 | struct lttng_viewer_new_streams_request rq; |
1497 | struct lttng_viewer_new_streams_response rp; | |
1498 | struct lttng_viewer_stream stream; | |
73b2b0d1 | 1499 | int ret, i, nb_streams = 0; |
6192b988 | 1500 | ssize_t ret_len; |
b5a1fa45 | 1501 | uint32_t stream_count; |
6192b988 | 1502 | |
8ace20bf MD |
1503 | if (lttng_live_should_quit()) { |
1504 | ret = -1; | |
1505 | goto end; | |
1506 | } | |
1507 | ||
2acdc547 JD |
1508 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_NEW_STREAMS); |
1509 | cmd.data_size = sizeof(rq); | |
6192b988 JD |
1510 | cmd.cmd_version = 0; |
1511 | ||
2acdc547 JD |
1512 | memset(&rq, 0, sizeof(rq)); |
1513 | rq.session_id = htobe64(id); | |
1514 | ||
b7e8a8e1 | 1515 | ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd)); |
6192b988 | 1516 | if (ret_len < 0) { |
79620497 | 1517 | perror("[error] Error sending cmd"); |
6192b988 JD |
1518 | goto error; |
1519 | } | |
1520 | assert(ret_len == sizeof(cmd)); | |
1521 | ||
b7e8a8e1 | 1522 | ret_len = lttng_live_send(ctx->control_sock, &rq, sizeof(rq)); |
6192b988 | 1523 | if (ret_len < 0) { |
79620497 | 1524 | perror("[error] Error sending get_new_streams request"); |
6192b988 JD |
1525 | goto error; |
1526 | } | |
2acdc547 | 1527 | assert(ret_len == sizeof(rq)); |
6192b988 | 1528 | |
b7e8a8e1 | 1529 | ret_len = lttng_live_recv(ctx->control_sock, &rp, sizeof(rp)); |
f8612f31 MD |
1530 | if (ret_len == 0) { |
1531 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
1532 | goto error; |
1533 | } | |
2acdc547 | 1534 | if (ret_len < 0) { |
79620497 | 1535 | perror("[error] Error receiving get_new_streams response"); |
6192b988 JD |
1536 | goto error; |
1537 | } | |
2acdc547 JD |
1538 | assert(ret_len == sizeof(rp)); |
1539 | ||
1540 | switch(be32toh(rp.status)) { | |
1541 | case LTTNG_VIEWER_NEW_STREAMS_OK: | |
1542 | break; | |
1543 | case LTTNG_VIEWER_NEW_STREAMS_NO_NEW: | |
1544 | ret = 0; | |
1545 | goto end; | |
1546 | case LTTNG_VIEWER_NEW_STREAMS_HUP: | |
1547 | ret = -LTTNG_VIEWER_NEW_STREAMS_HUP; | |
1548 | goto end; | |
1549 | case LTTNG_VIEWER_NEW_STREAMS_ERR: | |
1550 | fprintf(stderr, "[error] get_new_streams error\n"); | |
8ace20bf | 1551 | goto error; |
2acdc547 JD |
1552 | default: |
1553 | fprintf(stderr, "[error] Unknown return code %u\n", | |
1554 | be32toh(rp.status)); | |
8ace20bf | 1555 | goto error; |
2acdc547 JD |
1556 | } |
1557 | ||
b5a1fa45 JD |
1558 | stream_count = be32toh(rp.streams_count); |
1559 | ctx->session->stream_count += stream_count; | |
2acdc547 JD |
1560 | /* |
1561 | * When the session is created but not started, we do an active wait | |
1562 | * until it starts. It allows the viewer to start processing the trace | |
1563 | * as soon as the session starts. | |
1564 | */ | |
1565 | if (ctx->session->stream_count == 0) { | |
1566 | ret = 0; | |
1567 | goto end; | |
1568 | } | |
1569 | printf_verbose("Waiting for %" PRIu64 " streams:\n", | |
1570 | ctx->session->stream_count); | |
1571 | ctx->session->streams = g_new0(struct lttng_live_viewer_stream, | |
1572 | ctx->session->stream_count); | |
b5a1fa45 | 1573 | for (i = 0; i < stream_count; i++) { |
b7e8a8e1 | 1574 | ret_len = lttng_live_recv(ctx->control_sock, &stream, sizeof(stream)); |
f8612f31 MD |
1575 | if (ret_len == 0) { |
1576 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
1577 | goto error; |
1578 | } | |
2acdc547 | 1579 | if (ret_len < 0) { |
79620497 | 1580 | perror("[error] Error receiving stream"); |
2acdc547 JD |
1581 | goto error; |
1582 | } | |
1583 | assert(ret_len == sizeof(stream)); | |
1584 | stream.path_name[LTTNG_VIEWER_PATH_MAX - 1] = '\0'; | |
1585 | stream.channel_name[LTTNG_VIEWER_NAME_MAX - 1] = '\0'; | |
1586 | ||
1587 | printf_verbose(" stream %" PRIu64 " : %s/%s\n", | |
1588 | be64toh(stream.id), stream.path_name, | |
1589 | stream.channel_name); | |
1590 | ctx->session->streams[i].id = be64toh(stream.id); | |
1591 | ctx->session->streams[i].session = ctx->session; | |
1592 | ||
2acdc547 | 1593 | ctx->session->streams[i].mmap_size = 0; |
fb6b45aa | 1594 | ctx->session->streams[i].ctf_stream_id = -1ULL; |
2acdc547 JD |
1595 | |
1596 | if (be32toh(stream.metadata_flag)) { | |
2acdc547 | 1597 | ctx->session->streams[i].metadata_flag = 1; |
2acdc547 JD |
1598 | } |
1599 | ret = lttng_live_ctf_trace_assign(&ctx->session->streams[i], | |
1600 | be64toh(stream.ctf_trace_id)); | |
1601 | if (ret < 0) { | |
1602 | goto error; | |
1603 | } | |
73b2b0d1 | 1604 | nb_streams++; |
2acdc547 JD |
1605 | |
1606 | } | |
73b2b0d1 | 1607 | ret = nb_streams; |
2acdc547 | 1608 | end: |
6192b988 | 1609 | return ret; |
8ace20bf MD |
1610 | |
1611 | error: | |
1612 | return -1; | |
6192b988 JD |
1613 | } |
1614 | ||
28756729 | 1615 | int lttng_live_read(struct lttng_live_ctx *ctx) |
4a744367 | 1616 | { |
28756729 JG |
1617 | int ret = -1; |
1618 | int i; | |
4a744367 JD |
1619 | struct bt_ctf_iter *iter; |
1620 | const struct bt_ctf_event *event; | |
1621 | struct bt_iter_pos begin_pos; | |
1622 | struct bt_trace_descriptor *td_write; | |
1623 | struct bt_format *fmt_write; | |
1624 | struct ctf_text_stream_pos *sout; | |
2acdc547 | 1625 | uint64_t id; |
4a744367 | 1626 | |
2acdc547 JD |
1627 | ctx->bt_ctx = bt_context_create(); |
1628 | if (!ctx->bt_ctx) { | |
4a744367 JD |
1629 | fprintf(stderr, "[error] bt_context_create allocation\n"); |
1630 | goto end; | |
1631 | } | |
1632 | ||
1633 | fmt_write = bt_lookup_format(g_quark_from_static_string("text")); | |
1634 | if (!fmt_write) { | |
1635 | fprintf(stderr, "[error] ctf-text error\n"); | |
1636 | goto end; | |
1637 | } | |
1638 | ||
1639 | td_write = fmt_write->open_trace(NULL, O_RDWR, NULL, NULL); | |
1640 | if (!td_write) { | |
1641 | fprintf(stderr, "[error] Error opening output trace\n"); | |
1642 | goto end_free; | |
1643 | } | |
1644 | ||
1645 | sout = container_of(td_write, struct ctf_text_stream_pos, | |
1646 | trace_descriptor); | |
85bb4663 | 1647 | if (!sout->parent.event_cb) { |
4a744367 | 1648 | goto end_free; |
85bb4663 | 1649 | } |
4a744367 | 1650 | |
6192b988 JD |
1651 | ret = lttng_live_create_viewer_session(ctx); |
1652 | if (ret < 0) { | |
1653 | goto end_free; | |
1654 | } | |
1655 | ||
2acdc547 JD |
1656 | for (i = 0; i < ctx->session_ids->len; i++) { |
1657 | id = g_array_index(ctx->session_ids, uint64_t, i); | |
7e5e4176 | 1658 | printf_verbose("Attaching to session %" PRIu64 "\n", id); |
2acdc547 JD |
1659 | ret = lttng_live_attach_session(ctx, id); |
1660 | printf_verbose("Attaching session returns %d\n", ret); | |
1661 | if (ret < 0) { | |
1662 | if (ret == -LTTNG_VIEWER_ATTACH_UNK) { | |
1663 | fprintf(stderr, "[error] Unknown session ID\n"); | |
1664 | } | |
1665 | goto end_free; | |
1666 | } | |
1667 | } | |
1668 | ||
4a744367 | 1669 | /* |
2acdc547 | 1670 | * As long as the session is active, we try to get new streams. |
4a744367 | 1671 | */ |
2acdc547 | 1672 | for (;;) { |
4a744367 JD |
1673 | int flags; |
1674 | ||
8ace20bf | 1675 | if (lttng_live_should_quit()) { |
28756729 | 1676 | ret = 0; |
8ace20bf MD |
1677 | goto end_free; |
1678 | } | |
1679 | ||
2acdc547 | 1680 | while (!ctx->session->stream_count) { |
8ace20bf MD |
1681 | if (lttng_live_should_quit() |
1682 | || ctx->session_ids->len == 0) { | |
28756729 | 1683 | ret = 0; |
4a744367 | 1684 | goto end_free; |
85bb4663 | 1685 | } |
2acdc547 | 1686 | ret = ask_new_streams(ctx); |
85bb4663 | 1687 | if (ret < 0) { |
2acdc547 | 1688 | goto end_free; |
85bb4663 MD |
1689 | } |
1690 | if (!ctx->session->stream_count) { | |
85e2085e | 1691 | (void) poll(NULL, 0, ACTIVE_POLL_DELAY); |
85bb4663 | 1692 | } |
2acdc547 | 1693 | } |
4a744367 | 1694 | |
7840bb08 JD |
1695 | ret = add_traces(ctx); |
1696 | if (ret < 0) { | |
1697 | goto end_free; | |
1698 | } | |
4a744367 JD |
1699 | |
1700 | begin_pos.type = BT_SEEK_BEGIN; | |
2acdc547 | 1701 | iter = bt_ctf_iter_create(ctx->bt_ctx, &begin_pos, NULL); |
4a744367 | 1702 | if (!iter) { |
e29395a8 JG |
1703 | if (lttng_live_should_quit()) { |
1704 | ret = 0; | |
1705 | goto end; | |
1706 | } | |
4a744367 JD |
1707 | fprintf(stderr, "[error] Iterator creation error\n"); |
1708 | goto end; | |
1709 | } | |
1710 | for (;;) { | |
8ace20bf | 1711 | if (lttng_live_should_quit()) { |
28756729 | 1712 | ret = 0; |
8ace20bf MD |
1713 | goto end_free; |
1714 | } | |
4a744367 JD |
1715 | event = bt_ctf_iter_read_event_flags(iter, &flags); |
1716 | if (!(flags & BT_ITER_FLAG_RETRY)) { | |
1717 | if (!event) { | |
1718 | /* End of trace */ | |
1719 | break; | |
1720 | } | |
1721 | ret = sout->parent.event_cb(&sout->parent, | |
1722 | event->parent->stream); | |
1723 | if (ret) { | |
1724 | fprintf(stderr, "[error] Writing " | |
1725 | "event failed.\n"); | |
1726 | goto end_free; | |
1727 | } | |
1728 | } | |
1729 | ret = bt_iter_next(bt_ctf_get_iter(iter)); | |
1730 | if (ret < 0) { | |
1731 | goto end_free; | |
1732 | } | |
1733 | } | |
1734 | bt_ctf_iter_destroy(iter); | |
2acdc547 JD |
1735 | g_hash_table_foreach_remove(ctx->session->ctf_traces, |
1736 | del_traces, ctx->bt_ctx); | |
1737 | ctx->session->stream_count = 0; | |
1738 | } | |
4a744367 JD |
1739 | |
1740 | end_free: | |
2acdc547 | 1741 | bt_context_put(ctx->bt_ctx); |
4a744367 | 1742 | end: |
e29395a8 JG |
1743 | if (lttng_live_should_quit()) { |
1744 | ret = 0; | |
1745 | } | |
28756729 | 1746 | return ret; |
4a744367 | 1747 | } |