Commit | Line | Data |
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4a744367 JD |
1 | /* |
2 | * Copyright (C) 2013 - Julien Desfossez <jdesfossez@efficios.com> | |
3 | * Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
4 | * | |
5 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
6 | * of this software and associated documentation files (the "Software"), to deal | |
7 | * in the Software without restriction, including without limitation the rights | |
8 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
9 | * copies of the Software, and to permit persons to whom the Software is | |
10 | * furnished to do so, subject to the following conditions: | |
11 | * | |
12 | * The above copyright notice and this permission notice shall be included in | |
13 | * all copies or substantial portions of the Software. | |
14 | * | |
15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
18 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
20 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
21 | * SOFTWARE. | |
22 | */ | |
23 | ||
24 | #include <sys/socket.h> | |
25 | #include <sys/types.h> | |
26 | #include <netinet/in.h> | |
27 | #include <netdb.h> | |
28 | #include <stdio.h> | |
29 | #include <string.h> | |
30 | #include <stdlib.h> | |
31 | #include <unistd.h> | |
32 | #include <errno.h> | |
33 | #include <inttypes.h> | |
34 | #include <fcntl.h> | |
35 | #include <sys/mman.h> | |
85e2085e | 36 | #include <poll.h> |
4a744367 JD |
37 | |
38 | #include <babeltrace/ctf/ctf-index.h> | |
39 | ||
40 | #include <babeltrace/babeltrace.h> | |
41 | #include <babeltrace/ctf/events.h> | |
42 | #include <babeltrace/ctf/callbacks.h> | |
43 | #include <babeltrace/ctf/iterator.h> | |
44 | ||
45 | /* for packet_index */ | |
46 | #include <babeltrace/ctf/types.h> | |
47 | ||
48 | #include <babeltrace/ctf/metadata.h> | |
49 | #include <babeltrace/ctf-text/types.h> | |
50 | #include <babeltrace/ctf/events-internal.h> | |
51 | #include <formats/ctf/events-private.h> | |
52 | ||
af701dc4 JD |
53 | #include <babeltrace/compat/memstream.h> |
54 | ||
c98627ca | 55 | #include "lttng-live.h" |
158eea6e | 56 | #include "lttng-viewer-abi.h" |
4a744367 | 57 | |
85e2085e MD |
58 | #define ACTIVE_POLL_DELAY 100 /* ms */ |
59 | ||
4a744367 JD |
60 | /* |
61 | * Memory allocation zeroed | |
62 | */ | |
63 | #define zmalloc(x) calloc(1, x) | |
64 | ||
65 | #ifndef max_t | |
66 | #define max_t(type, a, b) \ | |
67 | ((type) (a) > (type) (b) ? (type) (a) : (type) (b)) | |
68 | #endif | |
69 | ||
b5a1fa45 JD |
70 | static void ctf_live_packet_seek(struct bt_stream_pos *stream_pos, |
71 | size_t index, int whence); | |
2acdc547 JD |
72 | static void add_traces(gpointer key, gpointer value, gpointer user_data); |
73 | static int del_traces(gpointer key, gpointer value, gpointer user_data); | |
9abca178 | 74 | static int get_new_metadata(struct lttng_live_ctx *ctx, |
af701dc4 JD |
75 | struct lttng_live_viewer_stream *viewer_stream, |
76 | char **metadata_buf); | |
2acdc547 | 77 | |
b7e8a8e1 MD |
78 | static |
79 | ssize_t lttng_live_recv(int fd, void *buf, size_t len) | |
80 | { | |
81 | ssize_t ret; | |
82 | size_t copied = 0, to_copy = len; | |
83 | ||
84 | do { | |
85 | ret = recv(fd, buf + copied, to_copy, 0); | |
86 | if (ret > 0) { | |
87 | assert(ret <= to_copy); | |
88 | copied += ret; | |
89 | to_copy -= ret; | |
90 | } | |
91 | } while ((ret > 0 && to_copy > 0) | |
92 | || (ret < 0 && errno == EINTR)); | |
93 | if (ret > 0) | |
94 | ret = copied; | |
95 | /* ret = 0 means orderly shutdown, ret < 0 is error. */ | |
96 | return ret; | |
97 | } | |
98 | ||
99 | static | |
100 | ssize_t lttng_live_send(int fd, const void *buf, size_t len) | |
101 | { | |
102 | ssize_t ret; | |
103 | ||
104 | do { | |
105 | ret = send(fd, buf, len, MSG_NOSIGNAL); | |
106 | } while (ret < 0 && errno == EINTR); | |
107 | return ret; | |
108 | } | |
109 | ||
b5a1fa45 | 110 | int lttng_live_connect_viewer(struct lttng_live_ctx *ctx) |
4a744367 JD |
111 | { |
112 | struct hostent *host; | |
113 | struct sockaddr_in server_addr; | |
114 | int ret; | |
115 | ||
b5a1fa45 | 116 | host = gethostbyname(ctx->relay_hostname); |
4a744367 JD |
117 | if (!host) { |
118 | ret = -1; | |
119 | goto end; | |
120 | } | |
121 | ||
122 | if ((ctx->control_sock = socket(AF_INET, SOCK_STREAM, 0)) == -1) { | |
123 | perror("Socket"); | |
124 | ret = -1; | |
125 | goto end; | |
126 | } | |
127 | ||
128 | server_addr.sin_family = AF_INET; | |
b5a1fa45 | 129 | server_addr.sin_port = htons(ctx->port); |
4a744367 JD |
130 | server_addr.sin_addr = *((struct in_addr *) host->h_addr); |
131 | bzero(&(server_addr.sin_zero), 8); | |
132 | ||
133 | if (connect(ctx->control_sock, (struct sockaddr *) &server_addr, | |
134 | sizeof(struct sockaddr)) == -1) { | |
135 | perror("Connect"); | |
136 | ret = -1; | |
137 | goto end; | |
138 | } | |
139 | ||
140 | ret = 0; | |
141 | ||
142 | end: | |
143 | return ret; | |
144 | } | |
145 | ||
146 | int lttng_live_establish_connection(struct lttng_live_ctx *ctx) | |
147 | { | |
148 | struct lttng_viewer_cmd cmd; | |
149 | struct lttng_viewer_connect connect; | |
150 | int ret; | |
151 | ssize_t ret_len; | |
152 | ||
153 | cmd.cmd = htobe32(LTTNG_VIEWER_CONNECT); | |
154 | cmd.data_size = sizeof(connect); | |
155 | cmd.cmd_version = 0; | |
156 | ||
0c3cd7e1 | 157 | connect.viewer_session_id = -1ULL; /* will be set on recv */ |
4a744367 JD |
158 | connect.major = htobe32(LTTNG_LIVE_MAJOR); |
159 | connect.minor = htobe32(LTTNG_LIVE_MINOR); | |
160 | connect.type = htobe32(LTTNG_VIEWER_CLIENT_COMMAND); | |
161 | ||
b7e8a8e1 | 162 | ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd)); |
4a744367 | 163 | if (ret_len < 0) { |
79620497 | 164 | perror("[error] Error sending cmd"); |
4a744367 JD |
165 | ret = ret_len; |
166 | goto error; | |
167 | } | |
168 | assert(ret_len == sizeof(cmd)); | |
169 | ||
b7e8a8e1 | 170 | ret_len = lttng_live_send(ctx->control_sock, &connect, sizeof(connect)); |
4a744367 | 171 | if (ret_len < 0) { |
79620497 | 172 | perror("[error] Error sending version"); |
4a744367 JD |
173 | ret = ret_len; |
174 | goto error; | |
175 | } | |
176 | assert(ret_len == sizeof(connect)); | |
177 | ||
b7e8a8e1 | 178 | ret_len = lttng_live_recv(ctx->control_sock, &connect, sizeof(connect)); |
f8612f31 MD |
179 | if (ret_len == 0) { |
180 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
181 | ret = -1; | |
182 | goto error; | |
183 | } | |
4a744367 | 184 | if (ret_len < 0) { |
79620497 | 185 | perror("[error] Error receiving version"); |
4a744367 JD |
186 | ret = ret_len; |
187 | goto error; | |
188 | } | |
189 | assert(ret_len == sizeof(connect)); | |
190 | ||
191 | printf_verbose("Received viewer session ID : %" PRIu64 "\n", | |
192 | be64toh(connect.viewer_session_id)); | |
193 | printf_verbose("Relayd version : %u.%u\n", be32toh(connect.major), | |
194 | be32toh(connect.minor)); | |
195 | ||
196 | ret = 0; | |
197 | ||
198 | error: | |
199 | return ret; | |
200 | } | |
201 | ||
b5a1fa45 JD |
202 | static |
203 | void free_session_list(GPtrArray *session_list) | |
204 | { | |
205 | int i; | |
206 | struct lttng_live_relay_session *relay_session; | |
207 | ||
208 | for (i = 0; i < session_list->len; i++) { | |
209 | relay_session = g_ptr_array_index(session_list, i); | |
210 | free(relay_session->name); | |
211 | free(relay_session->hostname); | |
212 | } | |
213 | g_ptr_array_free(session_list, TRUE); | |
214 | } | |
215 | ||
216 | static | |
217 | void print_session_list(GPtrArray *session_list, const char *path) | |
218 | { | |
219 | int i; | |
220 | struct lttng_live_relay_session *relay_session; | |
221 | ||
222 | for (i = 0; i < session_list->len; i++) { | |
223 | relay_session = g_ptr_array_index(session_list, i); | |
224 | fprintf(stdout, "%s/host/%s/%s (timer = %u, " | |
225 | "%u stream(s), %u client(s) connected)\n", | |
226 | path, relay_session->hostname, | |
227 | relay_session->name, relay_session->timer, | |
228 | relay_session->streams, relay_session->clients); | |
229 | } | |
230 | } | |
231 | ||
232 | static | |
233 | void update_session_list(GPtrArray *session_list, char *hostname, | |
234 | char *session_name, uint32_t streams, uint32_t clients, | |
235 | uint32_t timer) | |
236 | { | |
237 | int i, found = 0; | |
238 | struct lttng_live_relay_session *relay_session; | |
239 | ||
240 | for (i = 0; i < session_list->len; i++) { | |
241 | relay_session = g_ptr_array_index(session_list, i); | |
242 | if ((strncmp(relay_session->hostname, hostname, NAME_MAX) == 0) && | |
243 | strncmp(relay_session->name, | |
244 | session_name, NAME_MAX) == 0) { | |
245 | relay_session->streams += streams; | |
246 | if (relay_session->clients < clients) | |
247 | relay_session->clients = clients; | |
248 | found = 1; | |
249 | break; | |
250 | } | |
251 | } | |
252 | if (found) | |
253 | return; | |
254 | ||
255 | relay_session = g_new0(struct lttng_live_relay_session, 1); | |
256 | relay_session->hostname = strndup(hostname, NAME_MAX); | |
257 | relay_session->name = strndup(session_name, NAME_MAX); | |
258 | relay_session->clients = clients; | |
259 | relay_session->streams = streams; | |
260 | relay_session->timer = timer; | |
261 | g_ptr_array_add(session_list, relay_session); | |
262 | } | |
263 | ||
4a744367 JD |
264 | int lttng_live_list_sessions(struct lttng_live_ctx *ctx, const char *path) |
265 | { | |
266 | struct lttng_viewer_cmd cmd; | |
267 | struct lttng_viewer_list_sessions list; | |
268 | struct lttng_viewer_session lsession; | |
b5a1fa45 | 269 | int i, ret, sessions_count, print_list = 0; |
4a744367 | 270 | ssize_t ret_len; |
b5a1fa45 JD |
271 | uint64_t session_id; |
272 | GPtrArray *session_list = NULL; | |
273 | ||
274 | if (strlen(ctx->session_name) == 0) { | |
275 | print_list = 1; | |
276 | session_list = g_ptr_array_new(); | |
277 | } | |
4a744367 JD |
278 | |
279 | cmd.cmd = htobe32(LTTNG_VIEWER_LIST_SESSIONS); | |
280 | cmd.data_size = 0; | |
281 | cmd.cmd_version = 0; | |
282 | ||
b7e8a8e1 | 283 | ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd)); |
4a744367 | 284 | if (ret_len < 0) { |
79620497 | 285 | perror("[error] Error sending cmd"); |
4a744367 JD |
286 | ret = ret_len; |
287 | goto error; | |
288 | } | |
289 | assert(ret_len == sizeof(cmd)); | |
290 | ||
b7e8a8e1 | 291 | ret_len = lttng_live_recv(ctx->control_sock, &list, sizeof(list)); |
f8612f31 MD |
292 | if (ret_len == 0) { |
293 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
294 | ret = -1; | |
295 | goto error; | |
296 | } | |
4a744367 | 297 | if (ret_len < 0) { |
79620497 | 298 | perror("[error] Error receiving session list"); |
4a744367 JD |
299 | ret = ret_len; |
300 | goto error; | |
301 | } | |
302 | assert(ret_len == sizeof(list)); | |
303 | ||
304 | sessions_count = be32toh(list.sessions_count); | |
4a744367 | 305 | for (i = 0; i < sessions_count; i++) { |
b7e8a8e1 | 306 | ret_len = lttng_live_recv(ctx->control_sock, &lsession, sizeof(lsession)); |
f8612f31 MD |
307 | if (ret_len == 0) { |
308 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
309 | ret = -1; | |
310 | goto error; | |
311 | } | |
4a744367 | 312 | if (ret_len < 0) { |
79620497 | 313 | perror("[error] Error receiving session"); |
4a744367 JD |
314 | ret = ret_len; |
315 | goto error; | |
316 | } | |
317 | assert(ret_len == sizeof(lsession)); | |
9ed31e53 MD |
318 | lsession.hostname[LTTNG_VIEWER_HOST_NAME_MAX - 1] = '\0'; |
319 | lsession.session_name[LTTNG_VIEWER_NAME_MAX - 1] = '\0'; | |
b5a1fa45 JD |
320 | session_id = be64toh(lsession.id); |
321 | ||
322 | if (print_list) { | |
323 | update_session_list(session_list, | |
324 | lsession.hostname, | |
325 | lsession.session_name, | |
326 | be32toh(lsession.streams), | |
327 | be32toh(lsession.clients), | |
328 | be32toh(lsession.live_timer)); | |
329 | } else { | |
330 | if ((strncmp(lsession.session_name, ctx->session_name, | |
331 | NAME_MAX) == 0) && (strncmp(lsession.hostname, | |
332 | ctx->traced_hostname, NAME_MAX) == 0)) { | |
333 | printf_verbose("Reading from session %" PRIu64 "\n", | |
334 | session_id); | |
335 | g_array_append_val(ctx->session_ids, | |
336 | session_id); | |
337 | } | |
338 | } | |
339 | } | |
4a744367 | 340 | |
b5a1fa45 JD |
341 | if (print_list) { |
342 | print_session_list(session_list, path); | |
343 | free_session_list(session_list); | |
4a744367 JD |
344 | } |
345 | ||
346 | ret = 0; | |
347 | ||
348 | error: | |
349 | return ret; | |
350 | } | |
351 | ||
352 | int lttng_live_ctf_trace_assign(struct lttng_live_viewer_stream *stream, | |
353 | uint64_t ctf_trace_id) | |
354 | { | |
355 | struct lttng_live_ctf_trace *trace; | |
356 | int ret = 0; | |
357 | ||
358 | trace = g_hash_table_lookup(stream->session->ctf_traces, | |
359 | (gpointer) ctf_trace_id); | |
360 | if (!trace) { | |
361 | trace = g_new0(struct lttng_live_ctf_trace, 1); | |
4a744367 JD |
362 | trace->ctf_trace_id = ctf_trace_id; |
363 | trace->streams = g_ptr_array_new(); | |
364 | g_hash_table_insert(stream->session->ctf_traces, | |
365 | (gpointer) ctf_trace_id, | |
366 | trace); | |
367 | } | |
368 | if (stream->metadata_flag) | |
369 | trace->metadata_stream = stream; | |
370 | ||
371 | stream->ctf_trace = trace; | |
372 | g_ptr_array_add(trace->streams, stream); | |
373 | ||
4a744367 JD |
374 | return ret; |
375 | } | |
376 | ||
af701dc4 JD |
377 | static |
378 | int open_metadata_fp_write(struct lttng_live_viewer_stream *stream, | |
379 | char **metadata_buf, size_t *size) | |
380 | { | |
381 | int ret = 0; | |
382 | ||
383 | stream->metadata_fp_write = | |
384 | babeltrace_open_memstream(metadata_buf, size); | |
385 | if (!stream->metadata_fp_write) { | |
386 | perror("Metadata open_memstream"); | |
387 | ret = -1; | |
388 | } | |
389 | ||
390 | return ret; | |
391 | } | |
392 | ||
4a744367 JD |
393 | int lttng_live_attach_session(struct lttng_live_ctx *ctx, uint64_t id) |
394 | { | |
395 | struct lttng_viewer_cmd cmd; | |
396 | struct lttng_viewer_attach_session_request rq; | |
397 | struct lttng_viewer_attach_session_response rp; | |
398 | struct lttng_viewer_stream stream; | |
399 | int ret, i; | |
400 | ssize_t ret_len; | |
401 | ||
402 | cmd.cmd = htobe32(LTTNG_VIEWER_ATTACH_SESSION); | |
403 | cmd.data_size = sizeof(rq); | |
404 | cmd.cmd_version = 0; | |
405 | ||
406 | memset(&rq, 0, sizeof(rq)); | |
407 | rq.session_id = htobe64(id); | |
408 | // TODO: add cmd line parameter to select seek beginning | |
409 | // rq.seek = htobe32(LTTNG_VIEWER_SEEK_BEGINNING); | |
410 | rq.seek = htobe32(LTTNG_VIEWER_SEEK_LAST); | |
411 | ||
b7e8a8e1 | 412 | ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd)); |
4a744367 | 413 | if (ret_len < 0) { |
79620497 | 414 | perror("[error] Error sending cmd"); |
4a744367 JD |
415 | ret = ret_len; |
416 | goto error; | |
417 | } | |
418 | assert(ret_len == sizeof(cmd)); | |
419 | ||
b7e8a8e1 | 420 | ret_len = lttng_live_send(ctx->control_sock, &rq, sizeof(rq)); |
4a744367 | 421 | if (ret_len < 0) { |
79620497 | 422 | perror("[error] Error sending attach request"); |
4a744367 JD |
423 | ret = ret_len; |
424 | goto error; | |
425 | } | |
426 | assert(ret_len == sizeof(rq)); | |
427 | ||
b7e8a8e1 | 428 | ret_len = lttng_live_recv(ctx->control_sock, &rp, sizeof(rp)); |
f8612f31 MD |
429 | if (ret_len == 0) { |
430 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
431 | ret = -1; | |
432 | goto error; | |
433 | } | |
4a744367 | 434 | if (ret_len < 0) { |
79620497 | 435 | perror("[error] Error receiving attach response"); |
4a744367 JD |
436 | ret = ret_len; |
437 | goto error; | |
438 | } | |
439 | assert(ret_len == sizeof(rp)); | |
440 | ||
441 | switch(be32toh(rp.status)) { | |
442 | case LTTNG_VIEWER_ATTACH_OK: | |
443 | break; | |
444 | case LTTNG_VIEWER_ATTACH_UNK: | |
445 | ret = -LTTNG_VIEWER_ATTACH_UNK; | |
446 | goto end; | |
447 | case LTTNG_VIEWER_ATTACH_ALREADY: | |
79620497 | 448 | fprintf(stderr, "[error] There is already a viewer attached to this session\n"); |
4a744367 JD |
449 | ret = -1; |
450 | goto end; | |
451 | case LTTNG_VIEWER_ATTACH_NOT_LIVE: | |
452 | fprintf(stderr, "[error] Not a live session\n"); | |
453 | ret = -1; | |
454 | goto end; | |
455 | case LTTNG_VIEWER_ATTACH_SEEK_ERR: | |
456 | fprintf(stderr, "[error] Wrong seek parameter\n"); | |
457 | ret = -1; | |
458 | goto end; | |
459 | default: | |
460 | fprintf(stderr, "[error] Unknown attach return code %u\n", | |
461 | be32toh(rp.status)); | |
462 | ret = -1; | |
463 | goto end; | |
464 | } | |
465 | if (be32toh(rp.status) != LTTNG_VIEWER_ATTACH_OK) { | |
466 | ret = -1; | |
467 | goto end; | |
468 | } | |
469 | ||
2acdc547 | 470 | ctx->session->stream_count += be32toh(rp.streams_count); |
4a744367 JD |
471 | /* |
472 | * When the session is created but not started, we do an active wait | |
473 | * until it starts. It allows the viewer to start processing the trace | |
474 | * as soon as the session starts. | |
475 | */ | |
476 | if (ctx->session->stream_count == 0) { | |
477 | ret = 0; | |
478 | goto end; | |
479 | } | |
480 | printf_verbose("Waiting for %" PRIu64 " streams:\n", | |
481 | ctx->session->stream_count); | |
482 | ctx->session->streams = g_new0(struct lttng_live_viewer_stream, | |
483 | ctx->session->stream_count); | |
4a744367 | 484 | for (i = 0; i < be32toh(rp.streams_count); i++) { |
b7e8a8e1 | 485 | ret_len = lttng_live_recv(ctx->control_sock, &stream, sizeof(stream)); |
f8612f31 MD |
486 | if (ret_len == 0) { |
487 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
488 | ret = -1; | |
489 | goto error; | |
490 | } | |
4a744367 | 491 | if (ret_len < 0) { |
79620497 | 492 | perror("[error] Error receiving stream"); |
4a744367 JD |
493 | ret = ret_len; |
494 | goto error; | |
495 | } | |
496 | assert(ret_len == sizeof(stream)); | |
9ed31e53 MD |
497 | stream.path_name[LTTNG_VIEWER_PATH_MAX - 1] = '\0'; |
498 | stream.channel_name[LTTNG_VIEWER_NAME_MAX - 1] = '\0'; | |
4a744367 JD |
499 | |
500 | printf_verbose(" stream %" PRIu64 " : %s/%s\n", | |
501 | be64toh(stream.id), stream.path_name, | |
502 | stream.channel_name); | |
503 | ctx->session->streams[i].id = be64toh(stream.id); | |
504 | ctx->session->streams[i].session = ctx->session; | |
505 | ||
506 | ctx->session->streams[i].first_read = 1; | |
507 | ctx->session->streams[i].mmap_size = 0; | |
508 | ||
509 | if (be32toh(stream.metadata_flag)) { | |
4a744367 | 510 | ctx->session->streams[i].metadata_flag = 1; |
4a744367 JD |
511 | } |
512 | ret = lttng_live_ctf_trace_assign(&ctx->session->streams[i], | |
513 | be64toh(stream.ctf_trace_id)); | |
514 | if (ret < 0) { | |
515 | goto error; | |
516 | } | |
517 | ||
518 | } | |
519 | ret = 0; | |
520 | ||
521 | end: | |
522 | error: | |
523 | return ret; | |
524 | } | |
525 | ||
2acdc547 JD |
526 | static |
527 | int ask_new_streams(struct lttng_live_ctx *ctx) | |
528 | { | |
529 | int i, ret = 0; | |
530 | uint64_t id; | |
531 | ||
532 | restart: | |
533 | for (i = 0; i < ctx->session_ids->len; i++) { | |
534 | id = g_array_index(ctx->session_ids, uint64_t, i); | |
535 | ret = lttng_live_get_new_streams(ctx, id); | |
536 | printf_verbose("Asking for new streams returns %d\n", | |
537 | ret); | |
538 | if (ret < 0) { | |
539 | if (ret == -LTTNG_VIEWER_NEW_STREAMS_HUP) { | |
540 | printf_verbose("Session %" PRIu64 " closed\n", | |
541 | id); | |
b5a1fa45 JD |
542 | /* |
543 | * The streams have already been closed during | |
544 | * the reading, so we only need to get rid of | |
545 | * the trace in our internal table of sessions. | |
546 | */ | |
2acdc547 JD |
547 | g_array_remove_index(ctx->session_ids, i); |
548 | /* | |
549 | * We can't continue iterating on the g_array | |
550 | * after a remove, we have to start again. | |
551 | */ | |
552 | goto restart; | |
553 | } else { | |
554 | ret = -1; | |
555 | goto end; | |
556 | } | |
557 | } | |
558 | } | |
559 | ||
560 | end: | |
561 | return ret; | |
562 | } | |
563 | ||
50d207af JD |
564 | static |
565 | int append_metadata(struct lttng_live_ctx *ctx, | |
566 | struct lttng_live_viewer_stream *viewer_stream) | |
567 | { | |
568 | int ret; | |
569 | struct lttng_live_viewer_stream *metadata; | |
570 | char *metadata_buf = NULL; | |
571 | ||
572 | printf_verbose("get_next_index: new metadata needed\n"); | |
573 | ret = get_new_metadata(ctx, viewer_stream, &metadata_buf); | |
574 | if (ret < 0) { | |
575 | free(metadata_buf); | |
576 | goto error; | |
577 | } | |
578 | ||
579 | metadata = viewer_stream->ctf_trace->metadata_stream; | |
580 | metadata->ctf_trace->metadata_fp = | |
581 | babeltrace_fmemopen(metadata_buf, | |
582 | metadata->metadata_len, "rb"); | |
583 | if (!metadata->ctf_trace->metadata_fp) { | |
584 | perror("Metadata fmemopen"); | |
585 | free(metadata_buf); | |
586 | ret = -1; | |
587 | goto error; | |
588 | } | |
589 | ret = ctf_append_trace_metadata( | |
590 | viewer_stream->ctf_trace->handle->td, | |
591 | metadata->ctf_trace->metadata_fp); | |
251fc08c MD |
592 | /* We accept empty metadata packets */ |
593 | if (ret != 0 && ret != -ENOENT) { | |
50d207af JD |
594 | fprintf(stderr, "[error] Appending metadata\n"); |
595 | goto error; | |
596 | } | |
251fc08c | 597 | ret = 0; |
50d207af JD |
598 | |
599 | error: | |
600 | return ret; | |
601 | } | |
602 | ||
4a744367 JD |
603 | static |
604 | int get_data_packet(struct lttng_live_ctx *ctx, | |
605 | struct ctf_stream_pos *pos, | |
606 | struct lttng_live_viewer_stream *stream, uint64_t offset, | |
607 | uint64_t len) | |
608 | { | |
609 | struct lttng_viewer_cmd cmd; | |
610 | struct lttng_viewer_get_packet rq; | |
611 | struct lttng_viewer_trace_packet rp; | |
612 | ssize_t ret_len; | |
613 | int ret; | |
614 | ||
50d207af | 615 | retry: |
4a744367 JD |
616 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_PACKET); |
617 | cmd.data_size = sizeof(rq); | |
618 | cmd.cmd_version = 0; | |
619 | ||
620 | memset(&rq, 0, sizeof(rq)); | |
621 | rq.stream_id = htobe64(stream->id); | |
622 | /* Already in big endian. */ | |
623 | rq.offset = offset; | |
624 | rq.len = htobe32(len); | |
625 | ||
b7e8a8e1 | 626 | ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd)); |
4a744367 | 627 | if (ret_len < 0) { |
79620497 | 628 | perror("[error] Error sending cmd"); |
4a744367 JD |
629 | ret = ret_len; |
630 | goto error; | |
631 | } | |
632 | assert(ret_len == sizeof(cmd)); | |
633 | ||
b7e8a8e1 | 634 | ret_len = lttng_live_send(ctx->control_sock, &rq, sizeof(rq)); |
4a744367 | 635 | if (ret_len < 0) { |
79620497 | 636 | perror("[error] Error sending get_data_packet request"); |
4a744367 JD |
637 | ret = ret_len; |
638 | goto error; | |
639 | } | |
640 | assert(ret_len == sizeof(rq)); | |
641 | ||
b7e8a8e1 | 642 | ret_len = lttng_live_recv(ctx->control_sock, &rp, sizeof(rp)); |
f8612f31 MD |
643 | if (ret_len == 0) { |
644 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
645 | ret = -1; | |
646 | goto error; | |
647 | } | |
4a744367 | 648 | if (ret_len < 0) { |
79620497 | 649 | perror("[error] Error receiving data response"); |
4a744367 JD |
650 | ret = ret_len; |
651 | goto error; | |
652 | } | |
57b9d843 JD |
653 | if (ret_len != sizeof(rp)) { |
654 | fprintf(stderr, "[error] get_data_packet: expected %" PRId64 | |
655 | ", received %" PRId64 "\n", ret_len, | |
656 | sizeof(rp)); | |
657 | ret = -1; | |
658 | goto error; | |
659 | } | |
4a744367 JD |
660 | |
661 | rp.flags = be32toh(rp.flags); | |
662 | ||
663 | switch (be32toh(rp.status)) { | |
664 | case LTTNG_VIEWER_GET_PACKET_OK: | |
665 | len = be32toh(rp.len); | |
666 | printf_verbose("get_data_packet: Ok, packet size : %" PRIu64 | |
667 | "\n", len); | |
668 | break; | |
669 | case LTTNG_VIEWER_GET_PACKET_RETRY: | |
670 | printf_verbose("get_data_packet: retry\n"); | |
671 | ret = -1; | |
672 | goto end; | |
673 | case LTTNG_VIEWER_GET_PACKET_ERR: | |
674 | if (rp.flags & LTTNG_VIEWER_FLAG_NEW_METADATA) { | |
675 | printf_verbose("get_data_packet: new metadata needed\n"); | |
50d207af JD |
676 | ret = append_metadata(ctx, stream); |
677 | if (ret) | |
678 | goto error; | |
679 | goto retry; | |
4a744367 | 680 | } |
2acdc547 JD |
681 | if (rp.flags & LTTNG_VIEWER_FLAG_NEW_STREAM) { |
682 | ret = ask_new_streams(ctx); | |
683 | if (ret < 0) | |
684 | goto error; | |
685 | g_hash_table_foreach(ctx->session->ctf_traces, add_traces, | |
686 | ctx->bt_ctx); | |
687 | } | |
4a744367 JD |
688 | fprintf(stderr, "[error] get_data_packet: error\n"); |
689 | ret = -1; | |
690 | goto end; | |
691 | case LTTNG_VIEWER_GET_PACKET_EOF: | |
692 | ret = -2; | |
693 | goto error; | |
694 | default: | |
695 | printf_verbose("get_data_packet: unknown\n"); | |
696 | assert(0); | |
697 | ret = -1; | |
698 | goto end; | |
699 | } | |
700 | ||
701 | if (len <= 0) { | |
702 | ret = -1; | |
703 | goto end; | |
704 | } | |
705 | ||
706 | if (len > stream->mmap_size) { | |
707 | uint64_t new_size; | |
708 | ||
709 | new_size = max_t(uint64_t, len, stream->mmap_size << 1); | |
710 | if (pos->base_mma) { | |
711 | /* unmap old base */ | |
712 | ret = munmap_align(pos->base_mma); | |
713 | if (ret) { | |
79620497 | 714 | perror("[error] Unable to unmap old base"); |
4a744367 JD |
715 | ret = -1; |
716 | goto error; | |
717 | } | |
718 | pos->base_mma = NULL; | |
719 | } | |
720 | pos->base_mma = mmap_align(new_size, | |
721 | PROT_READ | PROT_WRITE, | |
722 | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); | |
723 | if (pos->base_mma == MAP_FAILED) { | |
79620497 | 724 | perror("[error] mmap error"); |
4a744367 JD |
725 | pos->base_mma = NULL; |
726 | ret = -1; | |
727 | goto error; | |
728 | } | |
729 | ||
730 | stream->mmap_size = new_size; | |
731 | printf_verbose("Expanding stream mmap size to %" PRIu64 " bytes\n", | |
732 | stream->mmap_size); | |
733 | } | |
734 | ||
b7e8a8e1 MD |
735 | ret_len = lttng_live_recv(ctx->control_sock, |
736 | mmap_align_addr(pos->base_mma), len); | |
f8612f31 MD |
737 | if (ret_len == 0) { |
738 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
739 | ret = -1; | |
740 | goto error; | |
741 | } | |
4a744367 | 742 | if (ret_len < 0) { |
79620497 | 743 | perror("[error] Error receiving trace packet"); |
4a744367 JD |
744 | ret = ret_len; |
745 | goto error; | |
746 | } | |
747 | assert(ret_len == len); | |
748 | ||
749 | end: | |
750 | error: | |
751 | return ret; | |
752 | } | |
753 | ||
4a744367 | 754 | static |
9abca178 JD |
755 | int get_one_metadata_packet(struct lttng_live_ctx *ctx, |
756 | struct lttng_live_viewer_stream *metadata_stream) | |
4a744367 JD |
757 | { |
758 | uint64_t len = 0; | |
759 | int ret; | |
760 | struct lttng_viewer_cmd cmd; | |
761 | struct lttng_viewer_get_metadata rq; | |
762 | struct lttng_viewer_metadata_packet rp; | |
4a744367 JD |
763 | char *data = NULL; |
764 | ssize_t ret_len; | |
765 | ||
9abca178 | 766 | rq.stream_id = htobe64(metadata_stream->id); |
4a744367 JD |
767 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_METADATA); |
768 | cmd.data_size = sizeof(rq); | |
769 | cmd.cmd_version = 0; | |
770 | ||
b7e8a8e1 | 771 | ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd)); |
4a744367 | 772 | if (ret_len < 0) { |
79620497 | 773 | perror("[error] Error sending cmd"); |
4a744367 JD |
774 | ret = ret_len; |
775 | goto error; | |
776 | } | |
777 | assert(ret_len == sizeof(cmd)); | |
778 | ||
b7e8a8e1 | 779 | ret_len = lttng_live_send(ctx->control_sock, &rq, sizeof(rq)); |
4a744367 | 780 | if (ret_len < 0) { |
79620497 | 781 | perror("[error] Error sending get_metadata request"); |
4a744367 JD |
782 | ret = ret_len; |
783 | goto error; | |
784 | } | |
785 | assert(ret_len == sizeof(rq)); | |
786 | ||
b7e8a8e1 | 787 | ret_len = lttng_live_recv(ctx->control_sock, &rp, sizeof(rp)); |
f8612f31 MD |
788 | if (ret_len == 0) { |
789 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
790 | ret = -1; | |
791 | goto error; | |
792 | } | |
4a744367 | 793 | if (ret_len < 0) { |
79620497 | 794 | perror("[error] Error receiving metadata response"); |
4a744367 JD |
795 | ret = ret_len; |
796 | goto error; | |
797 | } | |
798 | assert(ret_len == sizeof(rp)); | |
799 | ||
800 | switch (be32toh(rp.status)) { | |
801 | case LTTNG_VIEWER_METADATA_OK: | |
802 | printf_verbose("get_metadata : OK\n"); | |
803 | break; | |
804 | case LTTNG_VIEWER_NO_NEW_METADATA: | |
805 | printf_verbose("get_metadata : NO NEW\n"); | |
9abca178 | 806 | ret = 0; |
4a744367 JD |
807 | goto end; |
808 | case LTTNG_VIEWER_METADATA_ERR: | |
809 | printf_verbose("get_metadata : ERR\n"); | |
810 | ret = -1; | |
811 | goto end; | |
812 | default: | |
813 | printf_verbose("get_metadata : UNKNOWN\n"); | |
814 | ret = -1; | |
815 | goto end; | |
816 | } | |
817 | ||
818 | len = be64toh(rp.len); | |
819 | printf_verbose("Writing %" PRIu64" bytes to metadata\n", len); | |
820 | if (len <= 0) { | |
821 | ret = -1; | |
822 | goto end; | |
823 | } | |
824 | ||
825 | data = zmalloc(len); | |
826 | if (!data) { | |
827 | perror("relay data zmalloc"); | |
828 | ret = -1; | |
829 | goto error; | |
830 | } | |
b7e8a8e1 | 831 | ret_len = lttng_live_recv(ctx->control_sock, data, len); |
f8612f31 MD |
832 | if (ret_len == 0) { |
833 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
834 | ret = -1; | |
835 | free(data); | |
836 | goto error; | |
837 | } | |
4a744367 | 838 | if (ret_len < 0) { |
79620497 | 839 | perror("[error] Error receiving trace packet"); |
4a744367 JD |
840 | ret = ret_len; |
841 | free(data); | |
842 | goto error; | |
843 | } | |
844 | assert(ret_len == len); | |
845 | ||
846 | do { | |
af701dc4 JD |
847 | ret_len = fwrite(data, 1, len, |
848 | metadata_stream->metadata_fp_write); | |
4a744367 JD |
849 | } while (ret_len < 0 && errno == EINTR); |
850 | if (ret_len < 0) { | |
af701dc4 | 851 | fprintf(stderr, "[error] Writing in the metadata fp\n"); |
4a744367 JD |
852 | free(data); |
853 | ret = ret_len; | |
854 | goto error; | |
855 | } | |
856 | assert(ret_len == len); | |
af701dc4 | 857 | metadata_stream->metadata_len += len; |
9abca178 | 858 | ret = len; |
4a744367 JD |
859 | |
860 | free(data); | |
861 | ||
4a744367 JD |
862 | end: |
863 | error: | |
864 | return ret; | |
865 | } | |
866 | ||
9abca178 JD |
867 | /* |
868 | * Return 0 on success, a negative value on error. | |
869 | */ | |
870 | static | |
871 | int get_new_metadata(struct lttng_live_ctx *ctx, | |
af701dc4 JD |
872 | struct lttng_live_viewer_stream *viewer_stream, |
873 | char **metadata_buf) | |
9abca178 JD |
874 | { |
875 | int ret = 0; | |
876 | struct lttng_live_viewer_stream *metadata_stream; | |
c111d5d7 | 877 | size_t size, len_read = 0;; |
9abca178 JD |
878 | |
879 | metadata_stream = viewer_stream->ctf_trace->metadata_stream; | |
50d207af JD |
880 | if (!metadata_stream) { |
881 | fprintf(stderr, "[error] No metadata stream\n"); | |
882 | ret = -1; | |
883 | goto error; | |
884 | } | |
af701dc4 JD |
885 | metadata_stream->metadata_len = 0; |
886 | ret = open_metadata_fp_write(metadata_stream, metadata_buf, &size); | |
887 | if (ret < 0) { | |
888 | goto error; | |
889 | } | |
9abca178 JD |
890 | |
891 | do { | |
892 | /* | |
893 | * get_one_metadata_packet returns the number of bytes | |
894 | * received, 0 when we have received everything, a | |
895 | * negative value on error. | |
896 | */ | |
897 | ret = get_one_metadata_packet(ctx, metadata_stream); | |
c111d5d7 MD |
898 | if (ret > 0) { |
899 | len_read += ret; | |
900 | } | |
85e2085e MD |
901 | if (!len_read) { |
902 | (void) poll(NULL, 0, ACTIVE_POLL_DELAY); | |
903 | } | |
c111d5d7 | 904 | } while (ret > 0 || !len_read); |
9abca178 | 905 | |
7def295f MD |
906 | if (fclose(metadata_stream->metadata_fp_write)) |
907 | perror("fclose"); | |
af701dc4 JD |
908 | metadata_stream->metadata_fp_write = NULL; |
909 | ||
910 | error: | |
9abca178 JD |
911 | return ret; |
912 | } | |
913 | ||
4a744367 JD |
914 | /* |
915 | * Get one index for a stream. | |
916 | * | |
917 | * Returns 0 on success or a negative value on error. | |
918 | */ | |
919 | static | |
920 | int get_next_index(struct lttng_live_ctx *ctx, | |
921 | struct lttng_live_viewer_stream *viewer_stream, | |
922 | struct packet_index *index) | |
923 | { | |
924 | struct lttng_viewer_cmd cmd; | |
925 | struct lttng_viewer_get_next_index rq; | |
926 | struct lttng_viewer_index rp; | |
927 | int ret; | |
4a744367 JD |
928 | ssize_t ret_len; |
929 | ||
930 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_NEXT_INDEX); | |
931 | cmd.data_size = sizeof(rq); | |
932 | cmd.cmd_version = 0; | |
933 | ||
934 | memset(&rq, 0, sizeof(rq)); | |
935 | rq.stream_id = htobe64(viewer_stream->id); | |
936 | ||
937 | retry: | |
b7e8a8e1 | 938 | ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd)); |
4a744367 | 939 | if (ret_len < 0) { |
79620497 | 940 | perror("[error] Error sending cmd"); |
4a744367 JD |
941 | ret = ret_len; |
942 | goto error; | |
943 | } | |
944 | assert(ret_len == sizeof(cmd)); | |
945 | ||
b7e8a8e1 | 946 | ret_len = lttng_live_send(ctx->control_sock, &rq, sizeof(rq)); |
4a744367 | 947 | if (ret_len < 0) { |
79620497 | 948 | perror("[error] Error sending get_next_index request"); |
4a744367 JD |
949 | ret = ret_len; |
950 | goto error; | |
951 | } | |
952 | assert(ret_len == sizeof(rq)); | |
953 | ||
b7e8a8e1 | 954 | ret_len = lttng_live_recv(ctx->control_sock, &rp, sizeof(rp)); |
f8612f31 MD |
955 | if (ret_len == 0) { |
956 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
957 | ret = -1; | |
958 | goto error; | |
959 | } | |
4a744367 | 960 | if (ret_len < 0) { |
79620497 | 961 | perror("[error] Error receiving index response"); |
4a744367 JD |
962 | ret = ret_len; |
963 | goto error; | |
964 | } | |
965 | assert(ret_len == sizeof(rp)); | |
966 | ||
967 | rp.flags = be32toh(rp.flags); | |
968 | ||
969 | switch (be32toh(rp.status)) { | |
970 | case LTTNG_VIEWER_INDEX_INACTIVE: | |
971 | printf_verbose("get_next_index: inactive\n"); | |
972 | memset(index, 0, sizeof(struct packet_index)); | |
992e8cc0 | 973 | index->ts_cycles.timestamp_end = be64toh(rp.timestamp_end); |
4a744367 JD |
974 | break; |
975 | case LTTNG_VIEWER_INDEX_OK: | |
976 | printf_verbose("get_next_index: Ok, need metadata update : %u\n", | |
977 | rp.flags & LTTNG_VIEWER_FLAG_NEW_METADATA); | |
978 | index->offset = be64toh(rp.offset); | |
979 | index->packet_size = be64toh(rp.packet_size); | |
980 | index->content_size = be64toh(rp.content_size); | |
992e8cc0 MD |
981 | index->ts_cycles.timestamp_begin = be64toh(rp.timestamp_begin); |
982 | index->ts_cycles.timestamp_end = be64toh(rp.timestamp_end); | |
4a744367 JD |
983 | index->events_discarded = be64toh(rp.events_discarded); |
984 | ||
985 | if (rp.flags & LTTNG_VIEWER_FLAG_NEW_METADATA) { | |
50d207af JD |
986 | ret = append_metadata(ctx, viewer_stream); |
987 | if (ret) | |
4a744367 | 988 | goto error; |
4a744367 | 989 | } |
2acdc547 JD |
990 | if (rp.flags & LTTNG_VIEWER_FLAG_NEW_STREAM) { |
991 | ret = ask_new_streams(ctx); | |
992 | if (ret < 0) | |
993 | goto error; | |
994 | g_hash_table_foreach(ctx->session->ctf_traces, add_traces, | |
995 | ctx->bt_ctx); | |
996 | } | |
4a744367 JD |
997 | break; |
998 | case LTTNG_VIEWER_INDEX_RETRY: | |
999 | printf_verbose("get_next_index: retry\n"); | |
85e2085e | 1000 | (void) poll(NULL, 0, ACTIVE_POLL_DELAY); |
4a744367 JD |
1001 | goto retry; |
1002 | case LTTNG_VIEWER_INDEX_HUP: | |
1003 | printf_verbose("get_next_index: stream hung up\n"); | |
1004 | viewer_stream->id = -1ULL; | |
4a744367 | 1005 | index->offset = EOF; |
2acdc547 | 1006 | ctx->session->stream_count--; |
4a744367 JD |
1007 | break; |
1008 | case LTTNG_VIEWER_INDEX_ERR: | |
1009 | fprintf(stderr, "[error] get_next_index: error\n"); | |
1010 | ret = -1; | |
1011 | goto error; | |
1012 | default: | |
1013 | fprintf(stderr, "[error] get_next_index: unkwown value\n"); | |
1014 | ret = -1; | |
1015 | goto error; | |
1016 | } | |
1017 | ||
1018 | ret = 0; | |
1019 | ||
1020 | error: | |
1021 | return ret; | |
1022 | } | |
1023 | ||
b5a1fa45 | 1024 | static |
4a744367 JD |
1025 | void ctf_live_packet_seek(struct bt_stream_pos *stream_pos, size_t index, |
1026 | int whence) | |
1027 | { | |
1028 | struct ctf_stream_pos *pos; | |
1029 | struct ctf_file_stream *file_stream; | |
f1f52630 | 1030 | struct packet_index *prev_index = NULL, *cur_index; |
4a744367 JD |
1031 | struct lttng_live_viewer_stream *viewer_stream; |
1032 | struct lttng_live_session *session; | |
1033 | int ret; | |
1034 | ||
1035 | retry: | |
1036 | pos = ctf_pos(stream_pos); | |
1037 | file_stream = container_of(pos, struct ctf_file_stream, pos); | |
1038 | viewer_stream = (struct lttng_live_viewer_stream *) pos->priv; | |
1039 | session = viewer_stream->session; | |
1040 | ||
f1f52630 MD |
1041 | switch (pos->packet_index->len) { |
1042 | case 0: | |
1043 | g_array_set_size(pos->packet_index, 1); | |
1044 | cur_index = &g_array_index(pos->packet_index, | |
1045 | struct packet_index, 0); | |
1046 | break; | |
1047 | case 1: | |
1048 | g_array_set_size(pos->packet_index, 2); | |
1049 | prev_index = &g_array_index(pos->packet_index, | |
1050 | struct packet_index, 0); | |
1051 | cur_index = &g_array_index(pos->packet_index, | |
1052 | struct packet_index, 1); | |
1053 | break; | |
1054 | case 2: | |
1055 | g_array_index(pos->packet_index, | |
1056 | struct packet_index, 0) = | |
1057 | g_array_index(pos->packet_index, | |
1058 | struct packet_index, 1); | |
1059 | prev_index = &g_array_index(pos->packet_index, | |
1060 | struct packet_index, 0); | |
1061 | cur_index = &g_array_index(pos->packet_index, | |
1062 | struct packet_index, 1); | |
1063 | break; | |
1064 | default: | |
1065 | abort(); | |
1066 | break; | |
1067 | } | |
4a744367 | 1068 | printf_verbose("get_next_index for stream %" PRIu64 "\n", viewer_stream->id); |
f1f52630 | 1069 | ret = get_next_index(session->ctx, viewer_stream, cur_index); |
4a744367 JD |
1070 | if (ret < 0) { |
1071 | pos->offset = EOF; | |
1072 | fprintf(stderr, "[error] get_next_index failed\n"); | |
1073 | return; | |
1074 | } | |
1075 | ||
f1f52630 MD |
1076 | pos->packet_size = cur_index->packet_size; |
1077 | pos->content_size = cur_index->content_size; | |
4a744367 | 1078 | pos->mmap_base_offset = 0; |
f1f52630 | 1079 | if (cur_index->offset == EOF) { |
4a744367 JD |
1080 | pos->offset = EOF; |
1081 | } else { | |
1082 | pos->offset = 0; | |
1083 | } | |
1084 | ||
f1f52630 MD |
1085 | if (cur_index->content_size == 0) { |
1086 | file_stream->parent.cycles_timestamp = | |
1087 | cur_index->ts_cycles.timestamp_end; | |
4a744367 | 1088 | file_stream->parent.real_timestamp = ctf_get_real_timestamp( |
f1f52630 MD |
1089 | &file_stream->parent, |
1090 | cur_index->ts_cycles.timestamp_end); | |
4a744367 | 1091 | } else { |
f1f52630 MD |
1092 | /* Convert the timestamps and append to the real_index. */ |
1093 | cur_index->ts_real.timestamp_begin = ctf_get_real_timestamp( | |
1094 | &file_stream->parent, | |
1095 | cur_index->ts_cycles.timestamp_begin); | |
1096 | cur_index->ts_real.timestamp_end = ctf_get_real_timestamp( | |
1097 | &file_stream->parent, | |
1098 | cur_index->ts_cycles.timestamp_end); | |
1099 | ||
1100 | ctf_update_current_packet_index(&file_stream->parent, | |
1101 | prev_index, cur_index); | |
1102 | ||
1103 | file_stream->parent.cycles_timestamp = | |
1104 | cur_index->ts_cycles.timestamp_begin; | |
1105 | file_stream->parent.real_timestamp = | |
1106 | cur_index->ts_real.timestamp_begin; | |
4a744367 JD |
1107 | } |
1108 | ||
1109 | if (pos->packet_size == 0 || pos->offset == EOF) { | |
1110 | goto end; | |
1111 | } | |
1112 | ||
1113 | printf_verbose("get_data_packet for stream %" PRIu64 "\n", | |
1114 | viewer_stream->id); | |
1115 | ret = get_data_packet(session->ctx, pos, viewer_stream, | |
f1f52630 MD |
1116 | be64toh(cur_index->offset), |
1117 | cur_index->packet_size / CHAR_BIT); | |
4a744367 JD |
1118 | if (ret == -2) { |
1119 | goto retry; | |
1120 | } else if (ret < 0) { | |
1121 | pos->offset = EOF; | |
1122 | fprintf(stderr, "[error] get_data_packet failed\n"); | |
1123 | return; | |
1124 | } | |
1125 | ||
1126 | printf_verbose("Index received : packet_size : %" PRIu64 | |
1127 | ", offset %" PRIu64 ", content_size %" PRIu64 | |
1128 | ", timestamp_end : %" PRIu64 "\n", | |
f1f52630 MD |
1129 | cur_index->packet_size, cur_index->offset, |
1130 | cur_index->content_size, | |
1131 | cur_index->ts_cycles.timestamp_end); | |
4a744367 JD |
1132 | |
1133 | /* update trace_packet_header and stream_packet_context */ | |
1134 | if (pos->prot != PROT_WRITE && file_stream->parent.trace_packet_header) { | |
1135 | /* Read packet header */ | |
1136 | ret = generic_rw(&pos->parent, &file_stream->parent.trace_packet_header->p); | |
1137 | if (ret) { | |
1138 | pos->offset = EOF; | |
1139 | fprintf(stderr, "[error] trace packet header read failed\n"); | |
1140 | goto end; | |
1141 | } | |
1142 | } | |
1143 | if (pos->prot != PROT_WRITE && file_stream->parent.stream_packet_context) { | |
1144 | /* Read packet context */ | |
1145 | ret = generic_rw(&pos->parent, &file_stream->parent.stream_packet_context->p); | |
1146 | if (ret) { | |
1147 | pos->offset = EOF; | |
1148 | fprintf(stderr, "[error] stream packet context read failed\n"); | |
1149 | goto end; | |
1150 | } | |
1151 | } | |
1152 | pos->data_offset = pos->offset; | |
1153 | ||
1154 | end: | |
1155 | return; | |
1156 | } | |
1157 | ||
2acdc547 JD |
1158 | int lttng_live_create_viewer_session(struct lttng_live_ctx *ctx) |
1159 | { | |
1160 | struct lttng_viewer_cmd cmd; | |
1161 | struct lttng_viewer_create_session_response resp; | |
1162 | int ret; | |
1163 | ssize_t ret_len; | |
1164 | ||
1165 | cmd.cmd = htobe32(LTTNG_VIEWER_CREATE_SESSION); | |
1166 | cmd.data_size = 0; | |
1167 | cmd.cmd_version = 0; | |
1168 | ||
b7e8a8e1 | 1169 | ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd)); |
2acdc547 | 1170 | if (ret_len < 0) { |
79620497 | 1171 | perror("[error] Error sending cmd"); |
2acdc547 JD |
1172 | ret = ret_len; |
1173 | goto error; | |
1174 | } | |
1175 | assert(ret_len == sizeof(cmd)); | |
1176 | ||
b7e8a8e1 | 1177 | ret_len = lttng_live_recv(ctx->control_sock, &resp, sizeof(resp)); |
f8612f31 MD |
1178 | if (ret_len == 0) { |
1179 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
1180 | ret = -1; | |
1181 | goto error; | |
1182 | } | |
2acdc547 | 1183 | if (ret_len < 0) { |
79620497 | 1184 | perror("[error] Error receiving create session reply"); |
2acdc547 JD |
1185 | ret = ret_len; |
1186 | goto error; | |
1187 | } | |
1188 | assert(ret_len == sizeof(resp)); | |
1189 | ||
1190 | if (be32toh(resp.status) != LTTNG_VIEWER_CREATE_SESSION_OK) { | |
1191 | fprintf(stderr, "[error] Error creating viewer session\n"); | |
1192 | ret = -1; | |
1193 | goto error; | |
1194 | } | |
1195 | ret = 0; | |
1196 | ||
1197 | error: | |
1198 | return ret; | |
1199 | } | |
1200 | ||
1201 | static | |
1202 | int del_traces(gpointer key, gpointer value, gpointer user_data) | |
4a744367 JD |
1203 | { |
1204 | struct bt_context *bt_ctx = user_data; | |
1205 | struct lttng_live_ctf_trace *trace = value; | |
1206 | int ret; | |
1207 | ||
1208 | ret = bt_context_remove_trace(bt_ctx, trace->trace_id); | |
1209 | if (ret < 0) | |
1210 | fprintf(stderr, "[error] removing trace from context\n"); | |
1211 | ||
1212 | /* remove the key/value pair from the HT. */ | |
1213 | return 1; | |
1214 | } | |
1215 | ||
2acdc547 JD |
1216 | static |
1217 | void add_traces(gpointer key, gpointer value, gpointer user_data) | |
4a744367 | 1218 | { |
9abca178 | 1219 | int i, ret; |
4a744367 JD |
1220 | struct bt_context *bt_ctx = user_data; |
1221 | struct lttng_live_ctf_trace *trace = value; | |
1222 | struct lttng_live_viewer_stream *stream; | |
1223 | struct bt_mmap_stream *new_mmap_stream; | |
1224 | struct bt_mmap_stream_list mmap_list; | |
1225 | struct lttng_live_ctx *ctx = NULL; | |
150595c4 JD |
1226 | struct bt_trace_descriptor *td; |
1227 | struct bt_trace_handle *handle; | |
4a744367 | 1228 | |
b5a1fa45 JD |
1229 | /* |
1230 | * We don't know how many streams we will receive for a trace, so | |
1231 | * once we are done receiving the traces, we add all the traces | |
1232 | * received to the bt_context. | |
1233 | * We can receive streams during the attach command or the | |
1234 | * get_new_streams, so we have to make sure not to add multiple | |
1235 | * times the same traces. | |
1236 | * If a trace is already in the context, we just skip this function. | |
1237 | */ | |
2acdc547 JD |
1238 | if (trace->in_use) |
1239 | return; | |
1240 | ||
4a744367 JD |
1241 | BT_INIT_LIST_HEAD(&mmap_list.head); |
1242 | ||
1243 | for (i = 0; i < trace->streams->len; i++) { | |
1244 | stream = g_ptr_array_index(trace->streams, i); | |
1245 | ctx = stream->session->ctx; | |
1246 | ||
1247 | if (!stream->metadata_flag) { | |
1248 | new_mmap_stream = zmalloc(sizeof(struct bt_mmap_stream)); | |
1249 | new_mmap_stream->priv = (void *) stream; | |
1250 | new_mmap_stream->fd = -1; | |
1251 | bt_list_add(&new_mmap_stream->list, &mmap_list.head); | |
1252 | } else { | |
af701dc4 JD |
1253 | char *metadata_buf = NULL; |
1254 | ||
4a744367 | 1255 | /* Get all possible metadata before starting */ |
af701dc4 JD |
1256 | ret = get_new_metadata(ctx, stream, &metadata_buf); |
1257 | if (ret) { | |
1258 | free(metadata_buf); | |
1259 | goto end_free; | |
1260 | } | |
1261 | if (!stream->metadata_len) { | |
1262 | fprintf(stderr, "[error] empty metadata\n"); | |
1263 | ret = -1; | |
1264 | free(metadata_buf); | |
1265 | goto end_free; | |
1266 | } | |
1267 | ||
1268 | trace->metadata_fp = babeltrace_fmemopen(metadata_buf, | |
1269 | stream->metadata_len, "rb"); | |
1270 | if (!trace->metadata_fp) { | |
1271 | perror("Metadata fmemopen"); | |
1272 | ret = -1; | |
1273 | free(metadata_buf); | |
9abca178 | 1274 | goto end_free; |
af701dc4 | 1275 | } |
4a744367 JD |
1276 | } |
1277 | } | |
1278 | ||
1279 | if (!trace->metadata_fp) { | |
1280 | fprintf(stderr, "[error] No metadata stream opened\n"); | |
1281 | goto end_free; | |
1282 | } | |
1283 | ||
1284 | ret = bt_context_add_trace(bt_ctx, NULL, "ctf", | |
1285 | ctf_live_packet_seek, &mmap_list, trace->metadata_fp); | |
1286 | if (ret < 0) { | |
1287 | fprintf(stderr, "[error] Error adding trace\n"); | |
1288 | goto end_free; | |
1289 | } | |
af701dc4 JD |
1290 | trace->metadata_stream->metadata_len = 0; |
1291 | ||
150595c4 JD |
1292 | handle = (struct bt_trace_handle *) g_hash_table_lookup( |
1293 | bt_ctx->trace_handles, | |
1294 | (gpointer) (unsigned long) ret); | |
1295 | td = handle->td; | |
1296 | trace->handle = handle; | |
2acdc547 | 1297 | if (bt_ctx->current_iterator) { |
2acdc547 JD |
1298 | bt_iter_add_trace(bt_ctx->current_iterator, td); |
1299 | } | |
1300 | ||
4a744367 | 1301 | trace->trace_id = ret; |
2acdc547 | 1302 | trace->in_use = 1; |
4a744367 JD |
1303 | |
1304 | goto end; | |
1305 | ||
1306 | end_free: | |
1307 | bt_context_put(bt_ctx); | |
1308 | end: | |
1309 | return; | |
1310 | } | |
1311 | ||
2acdc547 | 1312 | int lttng_live_get_new_streams(struct lttng_live_ctx *ctx, uint64_t id) |
6192b988 JD |
1313 | { |
1314 | struct lttng_viewer_cmd cmd; | |
2acdc547 JD |
1315 | struct lttng_viewer_new_streams_request rq; |
1316 | struct lttng_viewer_new_streams_response rp; | |
1317 | struct lttng_viewer_stream stream; | |
1318 | int ret, i; | |
6192b988 | 1319 | ssize_t ret_len; |
b5a1fa45 | 1320 | uint32_t stream_count; |
6192b988 | 1321 | |
2acdc547 JD |
1322 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_NEW_STREAMS); |
1323 | cmd.data_size = sizeof(rq); | |
6192b988 JD |
1324 | cmd.cmd_version = 0; |
1325 | ||
2acdc547 JD |
1326 | memset(&rq, 0, sizeof(rq)); |
1327 | rq.session_id = htobe64(id); | |
1328 | ||
b7e8a8e1 | 1329 | ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd)); |
6192b988 | 1330 | if (ret_len < 0) { |
79620497 | 1331 | perror("[error] Error sending cmd"); |
6192b988 JD |
1332 | ret = ret_len; |
1333 | goto error; | |
1334 | } | |
1335 | assert(ret_len == sizeof(cmd)); | |
1336 | ||
b7e8a8e1 | 1337 | ret_len = lttng_live_send(ctx->control_sock, &rq, sizeof(rq)); |
6192b988 | 1338 | if (ret_len < 0) { |
79620497 | 1339 | perror("[error] Error sending get_new_streams request"); |
6192b988 JD |
1340 | ret = ret_len; |
1341 | goto error; | |
1342 | } | |
2acdc547 | 1343 | assert(ret_len == sizeof(rq)); |
6192b988 | 1344 | |
b7e8a8e1 | 1345 | ret_len = lttng_live_recv(ctx->control_sock, &rp, sizeof(rp)); |
f8612f31 MD |
1346 | if (ret_len == 0) { |
1347 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
1348 | ret = -1; | |
1349 | goto error; | |
1350 | } | |
2acdc547 | 1351 | if (ret_len < 0) { |
79620497 | 1352 | perror("[error] Error receiving get_new_streams response"); |
2acdc547 | 1353 | ret = ret_len; |
6192b988 JD |
1354 | goto error; |
1355 | } | |
2acdc547 JD |
1356 | assert(ret_len == sizeof(rp)); |
1357 | ||
1358 | switch(be32toh(rp.status)) { | |
1359 | case LTTNG_VIEWER_NEW_STREAMS_OK: | |
1360 | break; | |
1361 | case LTTNG_VIEWER_NEW_STREAMS_NO_NEW: | |
1362 | ret = 0; | |
1363 | goto end; | |
1364 | case LTTNG_VIEWER_NEW_STREAMS_HUP: | |
1365 | ret = -LTTNG_VIEWER_NEW_STREAMS_HUP; | |
1366 | goto end; | |
1367 | case LTTNG_VIEWER_NEW_STREAMS_ERR: | |
1368 | fprintf(stderr, "[error] get_new_streams error\n"); | |
1369 | ret = -1; | |
1370 | goto end; | |
1371 | default: | |
1372 | fprintf(stderr, "[error] Unknown return code %u\n", | |
1373 | be32toh(rp.status)); | |
1374 | ret = -1; | |
1375 | goto end; | |
1376 | } | |
1377 | ||
b5a1fa45 JD |
1378 | stream_count = be32toh(rp.streams_count); |
1379 | ctx->session->stream_count += stream_count; | |
2acdc547 JD |
1380 | /* |
1381 | * When the session is created but not started, we do an active wait | |
1382 | * until it starts. It allows the viewer to start processing the trace | |
1383 | * as soon as the session starts. | |
1384 | */ | |
1385 | if (ctx->session->stream_count == 0) { | |
1386 | ret = 0; | |
1387 | goto end; | |
1388 | } | |
1389 | printf_verbose("Waiting for %" PRIu64 " streams:\n", | |
1390 | ctx->session->stream_count); | |
1391 | ctx->session->streams = g_new0(struct lttng_live_viewer_stream, | |
1392 | ctx->session->stream_count); | |
b5a1fa45 | 1393 | for (i = 0; i < stream_count; i++) { |
b7e8a8e1 | 1394 | ret_len = lttng_live_recv(ctx->control_sock, &stream, sizeof(stream)); |
f8612f31 MD |
1395 | if (ret_len == 0) { |
1396 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
1397 | ret = -1; | |
1398 | goto error; | |
1399 | } | |
2acdc547 | 1400 | if (ret_len < 0) { |
79620497 | 1401 | perror("[error] Error receiving stream"); |
2acdc547 JD |
1402 | ret = ret_len; |
1403 | goto error; | |
1404 | } | |
1405 | assert(ret_len == sizeof(stream)); | |
1406 | stream.path_name[LTTNG_VIEWER_PATH_MAX - 1] = '\0'; | |
1407 | stream.channel_name[LTTNG_VIEWER_NAME_MAX - 1] = '\0'; | |
1408 | ||
1409 | printf_verbose(" stream %" PRIu64 " : %s/%s\n", | |
1410 | be64toh(stream.id), stream.path_name, | |
1411 | stream.channel_name); | |
1412 | ctx->session->streams[i].id = be64toh(stream.id); | |
1413 | ctx->session->streams[i].session = ctx->session; | |
1414 | ||
1415 | ctx->session->streams[i].first_read = 1; | |
1416 | ctx->session->streams[i].mmap_size = 0; | |
1417 | ||
1418 | if (be32toh(stream.metadata_flag)) { | |
2acdc547 | 1419 | ctx->session->streams[i].metadata_flag = 1; |
2acdc547 JD |
1420 | } |
1421 | ret = lttng_live_ctf_trace_assign(&ctx->session->streams[i], | |
1422 | be64toh(stream.ctf_trace_id)); | |
1423 | if (ret < 0) { | |
1424 | goto error; | |
1425 | } | |
1426 | ||
1427 | } | |
6192b988 JD |
1428 | ret = 0; |
1429 | ||
2acdc547 | 1430 | end: |
6192b988 JD |
1431 | error: |
1432 | return ret; | |
1433 | } | |
1434 | ||
2acdc547 | 1435 | void lttng_live_read(struct lttng_live_ctx *ctx) |
4a744367 | 1436 | { |
2acdc547 | 1437 | int ret, i; |
4a744367 JD |
1438 | struct bt_ctf_iter *iter; |
1439 | const struct bt_ctf_event *event; | |
1440 | struct bt_iter_pos begin_pos; | |
1441 | struct bt_trace_descriptor *td_write; | |
1442 | struct bt_format *fmt_write; | |
1443 | struct ctf_text_stream_pos *sout; | |
2acdc547 | 1444 | uint64_t id; |
4a744367 | 1445 | |
2acdc547 JD |
1446 | ctx->bt_ctx = bt_context_create(); |
1447 | if (!ctx->bt_ctx) { | |
4a744367 JD |
1448 | fprintf(stderr, "[error] bt_context_create allocation\n"); |
1449 | goto end; | |
1450 | } | |
1451 | ||
1452 | fmt_write = bt_lookup_format(g_quark_from_static_string("text")); | |
1453 | if (!fmt_write) { | |
1454 | fprintf(stderr, "[error] ctf-text error\n"); | |
1455 | goto end; | |
1456 | } | |
1457 | ||
1458 | td_write = fmt_write->open_trace(NULL, O_RDWR, NULL, NULL); | |
1459 | if (!td_write) { | |
1460 | fprintf(stderr, "[error] Error opening output trace\n"); | |
1461 | goto end_free; | |
1462 | } | |
1463 | ||
1464 | sout = container_of(td_write, struct ctf_text_stream_pos, | |
1465 | trace_descriptor); | |
1466 | if (!sout->parent.event_cb) | |
1467 | goto end_free; | |
1468 | ||
6192b988 JD |
1469 | ret = lttng_live_create_viewer_session(ctx); |
1470 | if (ret < 0) { | |
1471 | goto end_free; | |
1472 | } | |
1473 | ||
2acdc547 JD |
1474 | for (i = 0; i < ctx->session_ids->len; i++) { |
1475 | id = g_array_index(ctx->session_ids, uint64_t, i); | |
1476 | printf_verbose("Attaching to session %lu\n", id); | |
1477 | ret = lttng_live_attach_session(ctx, id); | |
1478 | printf_verbose("Attaching session returns %d\n", ret); | |
1479 | if (ret < 0) { | |
1480 | if (ret == -LTTNG_VIEWER_ATTACH_UNK) { | |
1481 | fprintf(stderr, "[error] Unknown session ID\n"); | |
1482 | } | |
1483 | goto end_free; | |
1484 | } | |
1485 | } | |
1486 | ||
4a744367 | 1487 | /* |
2acdc547 | 1488 | * As long as the session is active, we try to get new streams. |
4a744367 | 1489 | */ |
2acdc547 | 1490 | for (;;) { |
4a744367 JD |
1491 | int flags; |
1492 | ||
2acdc547 JD |
1493 | while (!ctx->session->stream_count) { |
1494 | if (ctx->session_ids->len == 0) | |
4a744367 | 1495 | goto end_free; |
2acdc547 JD |
1496 | ret = ask_new_streams(ctx); |
1497 | if (ret < 0) | |
1498 | goto end_free; | |
85e2085e MD |
1499 | if (!ctx->session->stream_count) |
1500 | (void) poll(NULL, 0, ACTIVE_POLL_DELAY); | |
2acdc547 | 1501 | } |
4a744367 | 1502 | |
2acdc547 JD |
1503 | g_hash_table_foreach(ctx->session->ctf_traces, add_traces, |
1504 | ctx->bt_ctx); | |
4a744367 JD |
1505 | |
1506 | begin_pos.type = BT_SEEK_BEGIN; | |
2acdc547 | 1507 | iter = bt_ctf_iter_create(ctx->bt_ctx, &begin_pos, NULL); |
4a744367 JD |
1508 | if (!iter) { |
1509 | fprintf(stderr, "[error] Iterator creation error\n"); | |
1510 | goto end; | |
1511 | } | |
1512 | for (;;) { | |
1513 | event = bt_ctf_iter_read_event_flags(iter, &flags); | |
1514 | if (!(flags & BT_ITER_FLAG_RETRY)) { | |
1515 | if (!event) { | |
1516 | /* End of trace */ | |
1517 | break; | |
1518 | } | |
1519 | ret = sout->parent.event_cb(&sout->parent, | |
1520 | event->parent->stream); | |
1521 | if (ret) { | |
1522 | fprintf(stderr, "[error] Writing " | |
1523 | "event failed.\n"); | |
1524 | goto end_free; | |
1525 | } | |
1526 | } | |
1527 | ret = bt_iter_next(bt_ctf_get_iter(iter)); | |
1528 | if (ret < 0) { | |
1529 | goto end_free; | |
1530 | } | |
1531 | } | |
1532 | bt_ctf_iter_destroy(iter); | |
2acdc547 JD |
1533 | g_hash_table_foreach_remove(ctx->session->ctf_traces, |
1534 | del_traces, ctx->bt_ctx); | |
1535 | ctx->session->stream_count = 0; | |
1536 | } | |
4a744367 JD |
1537 | |
1538 | end_free: | |
2acdc547 | 1539 | bt_context_put(ctx->bt_ctx); |
4a744367 JD |
1540 | end: |
1541 | return; | |
1542 | } |