Commit | Line | Data |
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4a744367 JD |
1 | /* |
2 | * Copyright (C) 2013 - Julien Desfossez <jdesfossez@efficios.com> | |
3 | * Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
4 | * | |
5 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
6 | * of this software and associated documentation files (the "Software"), to deal | |
7 | * in the Software without restriction, including without limitation the rights | |
8 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
9 | * copies of the Software, and to permit persons to whom the Software is | |
10 | * furnished to do so, subject to the following conditions: | |
11 | * | |
12 | * The above copyright notice and this permission notice shall be included in | |
13 | * all copies or substantial portions of the Software. | |
14 | * | |
15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
18 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
20 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
21 | * SOFTWARE. | |
22 | */ | |
23 | ||
24 | #include <sys/socket.h> | |
25 | #include <sys/types.h> | |
26 | #include <netinet/in.h> | |
27 | #include <netdb.h> | |
28 | #include <stdio.h> | |
4a744367 JD |
29 | #include <stdlib.h> |
30 | #include <unistd.h> | |
31 | #include <errno.h> | |
32 | #include <inttypes.h> | |
33 | #include <fcntl.h> | |
85e2085e | 34 | #include <poll.h> |
4a744367 JD |
35 | |
36 | #include <babeltrace/ctf/ctf-index.h> | |
37 | ||
38 | #include <babeltrace/babeltrace.h> | |
f6afb94e | 39 | #include <babeltrace/endian.h> |
4a744367 JD |
40 | #include <babeltrace/ctf/events.h> |
41 | #include <babeltrace/ctf/callbacks.h> | |
42 | #include <babeltrace/ctf/iterator.h> | |
43 | ||
44 | /* for packet_index */ | |
45 | #include <babeltrace/ctf/types.h> | |
46 | ||
47 | #include <babeltrace/ctf/metadata.h> | |
48 | #include <babeltrace/ctf-text/types.h> | |
49 | #include <babeltrace/ctf/events-internal.h> | |
50 | #include <formats/ctf/events-private.h> | |
51 | ||
af701dc4 | 52 | #include <babeltrace/compat/memstream.h> |
b319430e | 53 | #include <babeltrace/compat/send.h> |
5ea98697 | 54 | #include <babeltrace/compat/string.h> |
d8053c02 | 55 | #include <babeltrace/compat/mman.h> |
af701dc4 | 56 | |
c98627ca | 57 | #include "lttng-live.h" |
158eea6e | 58 | #include "lttng-viewer-abi.h" |
4a744367 | 59 | |
85e2085e MD |
60 | #define ACTIVE_POLL_DELAY 100 /* ms */ |
61 | ||
4a744367 JD |
62 | /* |
63 | * Memory allocation zeroed | |
64 | */ | |
65 | #define zmalloc(x) calloc(1, x) | |
66 | ||
67 | #ifndef max_t | |
68 | #define max_t(type, a, b) \ | |
69 | ((type) (a) > (type) (b) ? (type) (a) : (type) (b)) | |
70 | #endif | |
71 | ||
b5a1fa45 JD |
72 | static void ctf_live_packet_seek(struct bt_stream_pos *stream_pos, |
73 | size_t index, int whence); | |
7840bb08 | 74 | static int add_traces(struct lttng_live_ctx *ctx); |
2acdc547 | 75 | static int del_traces(gpointer key, gpointer value, gpointer user_data); |
9abca178 | 76 | static int get_new_metadata(struct lttng_live_ctx *ctx, |
af701dc4 JD |
77 | struct lttng_live_viewer_stream *viewer_stream, |
78 | char **metadata_buf); | |
2acdc547 | 79 | |
b7e8a8e1 MD |
80 | static |
81 | ssize_t lttng_live_recv(int fd, void *buf, size_t len) | |
82 | { | |
83 | ssize_t ret; | |
84 | size_t copied = 0, to_copy = len; | |
85 | ||
86 | do { | |
87 | ret = recv(fd, buf + copied, to_copy, 0); | |
88 | if (ret > 0) { | |
89 | assert(ret <= to_copy); | |
90 | copied += ret; | |
91 | to_copy -= ret; | |
92 | } | |
93 | } while ((ret > 0 && to_copy > 0) | |
94 | || (ret < 0 && errno == EINTR)); | |
95 | if (ret > 0) | |
96 | ret = copied; | |
97 | /* ret = 0 means orderly shutdown, ret < 0 is error. */ | |
98 | return ret; | |
99 | } | |
100 | ||
101 | static | |
102 | ssize_t lttng_live_send(int fd, const void *buf, size_t len) | |
103 | { | |
104 | ssize_t ret; | |
105 | ||
106 | do { | |
b319430e | 107 | ret = bt_send_nosigpipe(fd, buf, len); |
b7e8a8e1 MD |
108 | } while (ret < 0 && errno == EINTR); |
109 | return ret; | |
110 | } | |
111 | ||
b5a1fa45 | 112 | int lttng_live_connect_viewer(struct lttng_live_ctx *ctx) |
4a744367 JD |
113 | { |
114 | struct hostent *host; | |
115 | struct sockaddr_in server_addr; | |
116 | int ret; | |
117 | ||
8ace20bf | 118 | if (lttng_live_should_quit()) { |
4a744367 JD |
119 | ret = -1; |
120 | goto end; | |
121 | } | |
122 | ||
8ace20bf MD |
123 | host = gethostbyname(ctx->relay_hostname); |
124 | if (!host) { | |
125 | fprintf(stderr, "[error] Cannot lookup hostname %s\n", | |
126 | ctx->relay_hostname); | |
127 | goto error; | |
128 | } | |
129 | ||
4a744367 JD |
130 | if ((ctx->control_sock = socket(AF_INET, SOCK_STREAM, 0)) == -1) { |
131 | perror("Socket"); | |
8ace20bf | 132 | goto error; |
4a744367 JD |
133 | } |
134 | ||
135 | server_addr.sin_family = AF_INET; | |
b5a1fa45 | 136 | server_addr.sin_port = htons(ctx->port); |
4a744367 | 137 | server_addr.sin_addr = *((struct in_addr *) host->h_addr); |
ed959a6d | 138 | memset(&(server_addr.sin_zero), 0, 8); |
4a744367 JD |
139 | |
140 | if (connect(ctx->control_sock, (struct sockaddr *) &server_addr, | |
141 | sizeof(struct sockaddr)) == -1) { | |
142 | perror("Connect"); | |
8ace20bf | 143 | goto error; |
4a744367 JD |
144 | } |
145 | ||
146 | ret = 0; | |
147 | ||
148 | end: | |
149 | return ret; | |
8ace20bf MD |
150 | |
151 | error: | |
152 | fprintf(stderr, "[error] Connection failed\n"); | |
153 | return -1; | |
4a744367 JD |
154 | } |
155 | ||
156 | int lttng_live_establish_connection(struct lttng_live_ctx *ctx) | |
157 | { | |
158 | struct lttng_viewer_cmd cmd; | |
159 | struct lttng_viewer_connect connect; | |
160 | int ret; | |
161 | ssize_t ret_len; | |
162 | ||
8ace20bf MD |
163 | if (lttng_live_should_quit()) { |
164 | ret = -1; | |
165 | goto end; | |
166 | } | |
167 | ||
4a744367 | 168 | cmd.cmd = htobe32(LTTNG_VIEWER_CONNECT); |
259863bd | 169 | cmd.data_size = htobe64((uint64_t) sizeof(connect)); |
e11a3d28 | 170 | cmd.cmd_version = htobe32(0); |
4a744367 | 171 | |
0c3cd7e1 | 172 | connect.viewer_session_id = -1ULL; /* will be set on recv */ |
4a744367 JD |
173 | connect.major = htobe32(LTTNG_LIVE_MAJOR); |
174 | connect.minor = htobe32(LTTNG_LIVE_MINOR); | |
175 | connect.type = htobe32(LTTNG_VIEWER_CLIENT_COMMAND); | |
176 | ||
b7e8a8e1 | 177 | ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd)); |
4a744367 | 178 | if (ret_len < 0) { |
79620497 | 179 | perror("[error] Error sending cmd"); |
4a744367 JD |
180 | goto error; |
181 | } | |
182 | assert(ret_len == sizeof(cmd)); | |
183 | ||
b7e8a8e1 | 184 | ret_len = lttng_live_send(ctx->control_sock, &connect, sizeof(connect)); |
4a744367 | 185 | if (ret_len < 0) { |
79620497 | 186 | perror("[error] Error sending version"); |
4a744367 JD |
187 | goto error; |
188 | } | |
189 | assert(ret_len == sizeof(connect)); | |
190 | ||
b7e8a8e1 | 191 | ret_len = lttng_live_recv(ctx->control_sock, &connect, sizeof(connect)); |
f8612f31 MD |
192 | if (ret_len == 0) { |
193 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
194 | goto error; |
195 | } | |
4a744367 | 196 | if (ret_len < 0) { |
79620497 | 197 | perror("[error] Error receiving version"); |
4a744367 JD |
198 | goto error; |
199 | } | |
200 | assert(ret_len == sizeof(connect)); | |
201 | ||
202 | printf_verbose("Received viewer session ID : %" PRIu64 "\n", | |
203 | be64toh(connect.viewer_session_id)); | |
204 | printf_verbose("Relayd version : %u.%u\n", be32toh(connect.major), | |
205 | be32toh(connect.minor)); | |
9aa155c5 JD |
206 | |
207 | if (LTTNG_LIVE_MAJOR != be32toh(connect.major)) { | |
208 | fprintf(stderr, "[error] Incompatible lttng-relayd protocol\n"); | |
209 | goto error; | |
210 | } | |
211 | /* Use the smallest protocol version implemented. */ | |
212 | if (LTTNG_LIVE_MINOR > be32toh(connect.minor)) { | |
213 | ctx->minor = be32toh(connect.minor); | |
214 | } else { | |
215 | ctx->minor = LTTNG_LIVE_MINOR; | |
216 | } | |
217 | ctx->major = LTTNG_LIVE_MAJOR; | |
4a744367 | 218 | ret = 0; |
8ace20bf MD |
219 | end: |
220 | return ret; | |
4a744367 JD |
221 | |
222 | error: | |
8ace20bf MD |
223 | fprintf(stderr, "[error] Unable to establish connection\n"); |
224 | return -1; | |
4a744367 JD |
225 | } |
226 | ||
b5a1fa45 JD |
227 | static |
228 | void free_session_list(GPtrArray *session_list) | |
229 | { | |
230 | int i; | |
231 | struct lttng_live_relay_session *relay_session; | |
232 | ||
233 | for (i = 0; i < session_list->len; i++) { | |
234 | relay_session = g_ptr_array_index(session_list, i); | |
235 | free(relay_session->name); | |
236 | free(relay_session->hostname); | |
237 | } | |
238 | g_ptr_array_free(session_list, TRUE); | |
239 | } | |
240 | ||
241 | static | |
242 | void print_session_list(GPtrArray *session_list, const char *path) | |
243 | { | |
244 | int i; | |
245 | struct lttng_live_relay_session *relay_session; | |
246 | ||
247 | for (i = 0; i < session_list->len; i++) { | |
248 | relay_session = g_ptr_array_index(session_list, i); | |
857eaa68 | 249 | fprintf(LTTNG_LIVE_OUTPUT_FP, "%s/host/%s/%s (timer = %u, " |
b5a1fa45 JD |
250 | "%u stream(s), %u client(s) connected)\n", |
251 | path, relay_session->hostname, | |
252 | relay_session->name, relay_session->timer, | |
253 | relay_session->streams, relay_session->clients); | |
254 | } | |
255 | } | |
256 | ||
257 | static | |
258 | void update_session_list(GPtrArray *session_list, char *hostname, | |
259 | char *session_name, uint32_t streams, uint32_t clients, | |
260 | uint32_t timer) | |
261 | { | |
262 | int i, found = 0; | |
263 | struct lttng_live_relay_session *relay_session; | |
264 | ||
265 | for (i = 0; i < session_list->len; i++) { | |
266 | relay_session = g_ptr_array_index(session_list, i); | |
0206bb4a | 267 | if ((strncmp(relay_session->hostname, hostname, MAXNAMLEN) == 0) && |
b5a1fa45 | 268 | strncmp(relay_session->name, |
0206bb4a | 269 | session_name, MAXNAMLEN) == 0) { |
b5a1fa45 JD |
270 | relay_session->streams += streams; |
271 | if (relay_session->clients < clients) | |
272 | relay_session->clients = clients; | |
273 | found = 1; | |
274 | break; | |
275 | } | |
276 | } | |
277 | if (found) | |
278 | return; | |
279 | ||
280 | relay_session = g_new0(struct lttng_live_relay_session, 1); | |
5ea98697 MJ |
281 | relay_session->hostname = bt_strndup(hostname, MAXNAMLEN); |
282 | relay_session->name = bt_strndup(session_name, MAXNAMLEN); | |
b5a1fa45 JD |
283 | relay_session->clients = clients; |
284 | relay_session->streams = streams; | |
285 | relay_session->timer = timer; | |
286 | g_ptr_array_add(session_list, relay_session); | |
287 | } | |
288 | ||
4a744367 JD |
289 | int lttng_live_list_sessions(struct lttng_live_ctx *ctx, const char *path) |
290 | { | |
291 | struct lttng_viewer_cmd cmd; | |
292 | struct lttng_viewer_list_sessions list; | |
293 | struct lttng_viewer_session lsession; | |
b5a1fa45 | 294 | int i, ret, sessions_count, print_list = 0; |
4a744367 | 295 | ssize_t ret_len; |
b5a1fa45 JD |
296 | uint64_t session_id; |
297 | GPtrArray *session_list = NULL; | |
298 | ||
8ace20bf MD |
299 | if (lttng_live_should_quit()) { |
300 | ret = -1; | |
301 | goto end; | |
302 | } | |
303 | ||
b5a1fa45 JD |
304 | if (strlen(ctx->session_name) == 0) { |
305 | print_list = 1; | |
306 | session_list = g_ptr_array_new(); | |
307 | } | |
4a744367 JD |
308 | |
309 | cmd.cmd = htobe32(LTTNG_VIEWER_LIST_SESSIONS); | |
259863bd | 310 | cmd.data_size = htobe64((uint64_t) 0); |
e11a3d28 | 311 | cmd.cmd_version = htobe32(0); |
4a744367 | 312 | |
b7e8a8e1 | 313 | ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd)); |
4a744367 | 314 | if (ret_len < 0) { |
79620497 | 315 | perror("[error] Error sending cmd"); |
4a744367 JD |
316 | goto error; |
317 | } | |
318 | assert(ret_len == sizeof(cmd)); | |
319 | ||
b7e8a8e1 | 320 | ret_len = lttng_live_recv(ctx->control_sock, &list, sizeof(list)); |
f8612f31 MD |
321 | if (ret_len == 0) { |
322 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
323 | goto error; |
324 | } | |
4a744367 | 325 | if (ret_len < 0) { |
79620497 | 326 | perror("[error] Error receiving session list"); |
4a744367 JD |
327 | goto error; |
328 | } | |
329 | assert(ret_len == sizeof(list)); | |
330 | ||
331 | sessions_count = be32toh(list.sessions_count); | |
4a744367 | 332 | for (i = 0; i < sessions_count; i++) { |
b7e8a8e1 | 333 | ret_len = lttng_live_recv(ctx->control_sock, &lsession, sizeof(lsession)); |
f8612f31 MD |
334 | if (ret_len == 0) { |
335 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
336 | goto error; |
337 | } | |
4a744367 | 338 | if (ret_len < 0) { |
79620497 | 339 | perror("[error] Error receiving session"); |
4a744367 JD |
340 | goto error; |
341 | } | |
342 | assert(ret_len == sizeof(lsession)); | |
9ed31e53 MD |
343 | lsession.hostname[LTTNG_VIEWER_HOST_NAME_MAX - 1] = '\0'; |
344 | lsession.session_name[LTTNG_VIEWER_NAME_MAX - 1] = '\0'; | |
b5a1fa45 JD |
345 | session_id = be64toh(lsession.id); |
346 | ||
347 | if (print_list) { | |
348 | update_session_list(session_list, | |
349 | lsession.hostname, | |
350 | lsession.session_name, | |
351 | be32toh(lsession.streams), | |
352 | be32toh(lsession.clients), | |
353 | be32toh(lsession.live_timer)); | |
354 | } else { | |
355 | if ((strncmp(lsession.session_name, ctx->session_name, | |
0206bb4a MJ |
356 | MAXNAMLEN) == 0) && (strncmp(lsession.hostname, |
357 | ctx->traced_hostname, MAXNAMLEN) == 0)) { | |
b5a1fa45 JD |
358 | printf_verbose("Reading from session %" PRIu64 "\n", |
359 | session_id); | |
360 | g_array_append_val(ctx->session_ids, | |
361 | session_id); | |
362 | } | |
363 | } | |
364 | } | |
4a744367 | 365 | |
b5a1fa45 JD |
366 | if (print_list) { |
367 | print_session_list(session_list, path); | |
368 | free_session_list(session_list); | |
4a744367 | 369 | } |
4a744367 | 370 | ret = 0; |
8ace20bf MD |
371 | end: |
372 | return ret; | |
4a744367 JD |
373 | |
374 | error: | |
8ace20bf MD |
375 | fprintf(stderr, "[error] Unable to list sessions\n"); |
376 | return -1; | |
4a744367 JD |
377 | } |
378 | ||
379 | int lttng_live_ctf_trace_assign(struct lttng_live_viewer_stream *stream, | |
380 | uint64_t ctf_trace_id) | |
381 | { | |
382 | struct lttng_live_ctf_trace *trace; | |
383 | int ret = 0; | |
384 | ||
385 | trace = g_hash_table_lookup(stream->session->ctf_traces, | |
37307240 | 386 | &ctf_trace_id); |
4a744367 JD |
387 | if (!trace) { |
388 | trace = g_new0(struct lttng_live_ctf_trace, 1); | |
4a744367 JD |
389 | trace->ctf_trace_id = ctf_trace_id; |
390 | trace->streams = g_ptr_array_new(); | |
391 | g_hash_table_insert(stream->session->ctf_traces, | |
37307240 | 392 | &trace->ctf_trace_id, |
4a744367 JD |
393 | trace); |
394 | } | |
395 | if (stream->metadata_flag) | |
396 | trace->metadata_stream = stream; | |
397 | ||
398 | stream->ctf_trace = trace; | |
399 | g_ptr_array_add(trace->streams, stream); | |
400 | ||
4a744367 JD |
401 | return ret; |
402 | } | |
403 | ||
af701dc4 JD |
404 | static |
405 | int open_metadata_fp_write(struct lttng_live_viewer_stream *stream, | |
406 | char **metadata_buf, size_t *size) | |
407 | { | |
408 | int ret = 0; | |
409 | ||
410 | stream->metadata_fp_write = | |
411 | babeltrace_open_memstream(metadata_buf, size); | |
412 | if (!stream->metadata_fp_write) { | |
413 | perror("Metadata open_memstream"); | |
414 | ret = -1; | |
415 | } | |
416 | ||
417 | return ret; | |
418 | } | |
419 | ||
4a744367 JD |
420 | int lttng_live_attach_session(struct lttng_live_ctx *ctx, uint64_t id) |
421 | { | |
422 | struct lttng_viewer_cmd cmd; | |
423 | struct lttng_viewer_attach_session_request rq; | |
424 | struct lttng_viewer_attach_session_response rp; | |
425 | struct lttng_viewer_stream stream; | |
426 | int ret, i; | |
427 | ssize_t ret_len; | |
428 | ||
8ace20bf MD |
429 | if (lttng_live_should_quit()) { |
430 | ret = -1; | |
431 | goto end; | |
432 | } | |
433 | ||
4a744367 | 434 | cmd.cmd = htobe32(LTTNG_VIEWER_ATTACH_SESSION); |
259863bd | 435 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); |
e11a3d28 | 436 | cmd.cmd_version = htobe32(0); |
4a744367 JD |
437 | |
438 | memset(&rq, 0, sizeof(rq)); | |
439 | rq.session_id = htobe64(id); | |
440 | // TODO: add cmd line parameter to select seek beginning | |
441 | // rq.seek = htobe32(LTTNG_VIEWER_SEEK_BEGINNING); | |
442 | rq.seek = htobe32(LTTNG_VIEWER_SEEK_LAST); | |
443 | ||
b7e8a8e1 | 444 | ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd)); |
4a744367 | 445 | if (ret_len < 0) { |
79620497 | 446 | perror("[error] Error sending cmd"); |
4a744367 JD |
447 | goto error; |
448 | } | |
449 | assert(ret_len == sizeof(cmd)); | |
450 | ||
b7e8a8e1 | 451 | ret_len = lttng_live_send(ctx->control_sock, &rq, sizeof(rq)); |
4a744367 | 452 | if (ret_len < 0) { |
79620497 | 453 | perror("[error] Error sending attach request"); |
4a744367 JD |
454 | goto error; |
455 | } | |
456 | assert(ret_len == sizeof(rq)); | |
457 | ||
b7e8a8e1 | 458 | ret_len = lttng_live_recv(ctx->control_sock, &rp, sizeof(rp)); |
f8612f31 MD |
459 | if (ret_len == 0) { |
460 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
461 | goto error; |
462 | } | |
4a744367 | 463 | if (ret_len < 0) { |
79620497 | 464 | perror("[error] Error receiving attach response"); |
4a744367 JD |
465 | goto error; |
466 | } | |
467 | assert(ret_len == sizeof(rp)); | |
468 | ||
469 | switch(be32toh(rp.status)) { | |
470 | case LTTNG_VIEWER_ATTACH_OK: | |
471 | break; | |
472 | case LTTNG_VIEWER_ATTACH_UNK: | |
473 | ret = -LTTNG_VIEWER_ATTACH_UNK; | |
474 | goto end; | |
475 | case LTTNG_VIEWER_ATTACH_ALREADY: | |
79620497 | 476 | fprintf(stderr, "[error] There is already a viewer attached to this session\n"); |
8ace20bf | 477 | goto error; |
4a744367 JD |
478 | case LTTNG_VIEWER_ATTACH_NOT_LIVE: |
479 | fprintf(stderr, "[error] Not a live session\n"); | |
8ace20bf | 480 | goto error; |
4a744367 JD |
481 | case LTTNG_VIEWER_ATTACH_SEEK_ERR: |
482 | fprintf(stderr, "[error] Wrong seek parameter\n"); | |
8ace20bf | 483 | goto error; |
4a744367 JD |
484 | default: |
485 | fprintf(stderr, "[error] Unknown attach return code %u\n", | |
486 | be32toh(rp.status)); | |
8ace20bf | 487 | goto error; |
4a744367 JD |
488 | } |
489 | if (be32toh(rp.status) != LTTNG_VIEWER_ATTACH_OK) { | |
8ace20bf | 490 | goto error; |
4a744367 JD |
491 | } |
492 | ||
2acdc547 | 493 | ctx->session->stream_count += be32toh(rp.streams_count); |
4a744367 JD |
494 | /* |
495 | * When the session is created but not started, we do an active wait | |
496 | * until it starts. It allows the viewer to start processing the trace | |
497 | * as soon as the session starts. | |
498 | */ | |
499 | if (ctx->session->stream_count == 0) { | |
500 | ret = 0; | |
501 | goto end; | |
502 | } | |
503 | printf_verbose("Waiting for %" PRIu64 " streams:\n", | |
504 | ctx->session->stream_count); | |
505 | ctx->session->streams = g_new0(struct lttng_live_viewer_stream, | |
506 | ctx->session->stream_count); | |
4a744367 | 507 | for (i = 0; i < be32toh(rp.streams_count); i++) { |
b7e8a8e1 | 508 | ret_len = lttng_live_recv(ctx->control_sock, &stream, sizeof(stream)); |
f8612f31 MD |
509 | if (ret_len == 0) { |
510 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
511 | goto error; |
512 | } | |
4a744367 | 513 | if (ret_len < 0) { |
79620497 | 514 | perror("[error] Error receiving stream"); |
4a744367 JD |
515 | goto error; |
516 | } | |
517 | assert(ret_len == sizeof(stream)); | |
9ed31e53 MD |
518 | stream.path_name[LTTNG_VIEWER_PATH_MAX - 1] = '\0'; |
519 | stream.channel_name[LTTNG_VIEWER_NAME_MAX - 1] = '\0'; | |
4a744367 JD |
520 | |
521 | printf_verbose(" stream %" PRIu64 " : %s/%s\n", | |
522 | be64toh(stream.id), stream.path_name, | |
523 | stream.channel_name); | |
524 | ctx->session->streams[i].id = be64toh(stream.id); | |
525 | ctx->session->streams[i].session = ctx->session; | |
526 | ||
4a744367 | 527 | ctx->session->streams[i].mmap_size = 0; |
fb6b45aa | 528 | ctx->session->streams[i].ctf_stream_id = -1ULL; |
4a744367 JD |
529 | |
530 | if (be32toh(stream.metadata_flag)) { | |
4a744367 | 531 | ctx->session->streams[i].metadata_flag = 1; |
4a744367 JD |
532 | } |
533 | ret = lttng_live_ctf_trace_assign(&ctx->session->streams[i], | |
534 | be64toh(stream.ctf_trace_id)); | |
535 | if (ret < 0) { | |
536 | goto error; | |
537 | } | |
538 | ||
539 | } | |
540 | ret = 0; | |
4a744367 | 541 | end: |
4a744367 | 542 | return ret; |
8ace20bf MD |
543 | |
544 | error: | |
545 | return -1; | |
4a744367 JD |
546 | } |
547 | ||
73b2b0d1 JD |
548 | /* |
549 | * Ask the relay for new streams. | |
550 | * | |
551 | * Returns the number of new streams received or a negative value on error. | |
552 | */ | |
2acdc547 JD |
553 | static |
554 | int ask_new_streams(struct lttng_live_ctx *ctx) | |
555 | { | |
73b2b0d1 | 556 | int i, ret = 0, nb_streams = 0; |
2acdc547 JD |
557 | uint64_t id; |
558 | ||
559 | restart: | |
560 | for (i = 0; i < ctx->session_ids->len; i++) { | |
561 | id = g_array_index(ctx->session_ids, uint64_t, i); | |
562 | ret = lttng_live_get_new_streams(ctx, id); | |
73b2b0d1 | 563 | printf_verbose("Asking for new streams returns %d\n", ret); |
2acdc547 | 564 | if (ret < 0) { |
e29395a8 JG |
565 | if (lttng_live_should_quit()) { |
566 | goto end; | |
567 | } | |
2acdc547 JD |
568 | if (ret == -LTTNG_VIEWER_NEW_STREAMS_HUP) { |
569 | printf_verbose("Session %" PRIu64 " closed\n", | |
570 | id); | |
b5a1fa45 JD |
571 | /* |
572 | * The streams have already been closed during | |
573 | * the reading, so we only need to get rid of | |
574 | * the trace in our internal table of sessions. | |
575 | */ | |
2acdc547 JD |
576 | g_array_remove_index(ctx->session_ids, i); |
577 | /* | |
578 | * We can't continue iterating on the g_array | |
579 | * after a remove, we have to start again. | |
580 | */ | |
581 | goto restart; | |
582 | } else { | |
583 | ret = -1; | |
584 | goto end; | |
585 | } | |
73b2b0d1 JD |
586 | } else { |
587 | nb_streams += ret; | |
2acdc547 JD |
588 | } |
589 | } | |
73b2b0d1 | 590 | ret = nb_streams; |
2acdc547 JD |
591 | |
592 | end: | |
593 | return ret; | |
594 | } | |
595 | ||
50d207af JD |
596 | static |
597 | int append_metadata(struct lttng_live_ctx *ctx, | |
598 | struct lttng_live_viewer_stream *viewer_stream) | |
599 | { | |
600 | int ret; | |
601 | struct lttng_live_viewer_stream *metadata; | |
602 | char *metadata_buf = NULL; | |
603 | ||
604 | printf_verbose("get_next_index: new metadata needed\n"); | |
605 | ret = get_new_metadata(ctx, viewer_stream, &metadata_buf); | |
606 | if (ret < 0) { | |
607 | free(metadata_buf); | |
608 | goto error; | |
609 | } | |
610 | ||
611 | metadata = viewer_stream->ctf_trace->metadata_stream; | |
612 | metadata->ctf_trace->metadata_fp = | |
613 | babeltrace_fmemopen(metadata_buf, | |
614 | metadata->metadata_len, "rb"); | |
615 | if (!metadata->ctf_trace->metadata_fp) { | |
616 | perror("Metadata fmemopen"); | |
617 | free(metadata_buf); | |
618 | ret = -1; | |
619 | goto error; | |
620 | } | |
621 | ret = ctf_append_trace_metadata( | |
622 | viewer_stream->ctf_trace->handle->td, | |
623 | metadata->ctf_trace->metadata_fp); | |
251fc08c MD |
624 | /* We accept empty metadata packets */ |
625 | if (ret != 0 && ret != -ENOENT) { | |
50d207af JD |
626 | fprintf(stderr, "[error] Appending metadata\n"); |
627 | goto error; | |
628 | } | |
251fc08c | 629 | ret = 0; |
50d207af JD |
630 | |
631 | error: | |
632 | return ret; | |
633 | } | |
634 | ||
4a744367 JD |
635 | static |
636 | int get_data_packet(struct lttng_live_ctx *ctx, | |
637 | struct ctf_stream_pos *pos, | |
638 | struct lttng_live_viewer_stream *stream, uint64_t offset, | |
639 | uint64_t len) | |
640 | { | |
641 | struct lttng_viewer_cmd cmd; | |
642 | struct lttng_viewer_get_packet rq; | |
643 | struct lttng_viewer_trace_packet rp; | |
644 | ssize_t ret_len; | |
645 | int ret; | |
646 | ||
50d207af | 647 | retry: |
8ace20bf MD |
648 | if (lttng_live_should_quit()) { |
649 | ret = -1; | |
650 | goto end; | |
651 | } | |
857eaa68 MD |
652 | |
653 | /* | |
654 | * Flush the output between attempts to grab a packet, thus | |
655 | * ensuring we flush at least at the periodical timer period. | |
656 | * This ensures the output remains reactive for interactive users and | |
657 | * that the output is flushed when redirected to a file by the shell. | |
658 | */ | |
659 | if (fflush(LTTNG_LIVE_OUTPUT_FP) < 0) { | |
660 | perror("fflush"); | |
661 | goto error; | |
662 | } | |
663 | ||
4a744367 | 664 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_PACKET); |
259863bd | 665 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); |
e11a3d28 | 666 | cmd.cmd_version = htobe32(0); |
4a744367 JD |
667 | |
668 | memset(&rq, 0, sizeof(rq)); | |
669 | rq.stream_id = htobe64(stream->id); | |
c1e8ac81 | 670 | rq.offset = htobe64(offset); |
4a744367 JD |
671 | rq.len = htobe32(len); |
672 | ||
b7e8a8e1 | 673 | ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd)); |
4a744367 | 674 | if (ret_len < 0) { |
79620497 | 675 | perror("[error] Error sending cmd"); |
4a744367 JD |
676 | goto error; |
677 | } | |
678 | assert(ret_len == sizeof(cmd)); | |
679 | ||
b7e8a8e1 | 680 | ret_len = lttng_live_send(ctx->control_sock, &rq, sizeof(rq)); |
4a744367 | 681 | if (ret_len < 0) { |
79620497 | 682 | perror("[error] Error sending get_data_packet request"); |
4a744367 JD |
683 | goto error; |
684 | } | |
685 | assert(ret_len == sizeof(rq)); | |
686 | ||
b7e8a8e1 | 687 | ret_len = lttng_live_recv(ctx->control_sock, &rp, sizeof(rp)); |
f8612f31 MD |
688 | if (ret_len == 0) { |
689 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
690 | goto error; |
691 | } | |
4a744367 | 692 | if (ret_len < 0) { |
79620497 | 693 | perror("[error] Error receiving data response"); |
4a744367 JD |
694 | goto error; |
695 | } | |
57b9d843 | 696 | if (ret_len != sizeof(rp)) { |
7e5e4176 MD |
697 | fprintf(stderr, "[error] get_data_packet: expected %zu" |
698 | ", received %zd\n", sizeof(rp), | |
a5e4b11e | 699 | ret_len); |
57b9d843 JD |
700 | goto error; |
701 | } | |
4a744367 JD |
702 | |
703 | rp.flags = be32toh(rp.flags); | |
704 | ||
705 | switch (be32toh(rp.status)) { | |
706 | case LTTNG_VIEWER_GET_PACKET_OK: | |
707 | len = be32toh(rp.len); | |
708 | printf_verbose("get_data_packet: Ok, packet size : %" PRIu64 | |
709 | "\n", len); | |
710 | break; | |
711 | case LTTNG_VIEWER_GET_PACKET_RETRY: | |
8ace20bf | 712 | /* Unimplemented by relay daemon */ |
4a744367 | 713 | printf_verbose("get_data_packet: retry\n"); |
8ace20bf | 714 | goto error; |
4a744367 JD |
715 | case LTTNG_VIEWER_GET_PACKET_ERR: |
716 | if (rp.flags & LTTNG_VIEWER_FLAG_NEW_METADATA) { | |
717 | printf_verbose("get_data_packet: new metadata needed\n"); | |
50d207af JD |
718 | ret = append_metadata(ctx, stream); |
719 | if (ret) | |
720 | goto error; | |
4a744367 | 721 | } |
2acdc547 | 722 | if (rp.flags & LTTNG_VIEWER_FLAG_NEW_STREAM) { |
f312b3aa | 723 | printf_verbose("get_data_packet: new streams needed\n"); |
2acdc547 | 724 | ret = ask_new_streams(ctx); |
7840bb08 | 725 | if (ret < 0) { |
2acdc547 | 726 | goto error; |
7840bb08 JD |
727 | } else if (ret > 0) { |
728 | ret = add_traces(ctx); | |
729 | if (ret < 0) { | |
730 | goto error; | |
731 | } | |
732 | } | |
2acdc547 | 733 | } |
f312b3aa MD |
734 | if (rp.flags & (LTTNG_VIEWER_FLAG_NEW_METADATA |
735 | | LTTNG_VIEWER_FLAG_NEW_STREAM)) { | |
736 | goto retry; | |
737 | } | |
4a744367 | 738 | fprintf(stderr, "[error] get_data_packet: error\n"); |
8ace20bf | 739 | goto error; |
4a744367 JD |
740 | case LTTNG_VIEWER_GET_PACKET_EOF: |
741 | ret = -2; | |
8ace20bf | 742 | goto end; |
4a744367 JD |
743 | default: |
744 | printf_verbose("get_data_packet: unknown\n"); | |
8ace20bf | 745 | goto error; |
4a744367 JD |
746 | } |
747 | ||
65ae9a82 | 748 | if (len == 0) { |
96943040 | 749 | goto error; |
4a744367 JD |
750 | } |
751 | ||
752 | if (len > stream->mmap_size) { | |
753 | uint64_t new_size; | |
754 | ||
755 | new_size = max_t(uint64_t, len, stream->mmap_size << 1); | |
756 | if (pos->base_mma) { | |
757 | /* unmap old base */ | |
758 | ret = munmap_align(pos->base_mma); | |
759 | if (ret) { | |
79620497 | 760 | perror("[error] Unable to unmap old base"); |
4a744367 JD |
761 | goto error; |
762 | } | |
763 | pos->base_mma = NULL; | |
764 | } | |
765 | pos->base_mma = mmap_align(new_size, | |
766 | PROT_READ | PROT_WRITE, | |
767 | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); | |
768 | if (pos->base_mma == MAP_FAILED) { | |
79620497 | 769 | perror("[error] mmap error"); |
4a744367 | 770 | pos->base_mma = NULL; |
4a744367 JD |
771 | goto error; |
772 | } | |
773 | ||
774 | stream->mmap_size = new_size; | |
775 | printf_verbose("Expanding stream mmap size to %" PRIu64 " bytes\n", | |
776 | stream->mmap_size); | |
777 | } | |
778 | ||
b7e8a8e1 MD |
779 | ret_len = lttng_live_recv(ctx->control_sock, |
780 | mmap_align_addr(pos->base_mma), len); | |
f8612f31 MD |
781 | if (ret_len == 0) { |
782 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
783 | goto error; |
784 | } | |
4a744367 | 785 | if (ret_len < 0) { |
79620497 | 786 | perror("[error] Error receiving trace packet"); |
4a744367 JD |
787 | goto error; |
788 | } | |
789 | assert(ret_len == len); | |
f312b3aa | 790 | ret = 0; |
4a744367 | 791 | end: |
4a744367 | 792 | return ret; |
8ace20bf MD |
793 | |
794 | error: | |
795 | return -1; | |
4a744367 JD |
796 | } |
797 | ||
4a744367 | 798 | static |
9abca178 JD |
799 | int get_one_metadata_packet(struct lttng_live_ctx *ctx, |
800 | struct lttng_live_viewer_stream *metadata_stream) | |
4a744367 JD |
801 | { |
802 | uint64_t len = 0; | |
803 | int ret; | |
804 | struct lttng_viewer_cmd cmd; | |
805 | struct lttng_viewer_get_metadata rq; | |
806 | struct lttng_viewer_metadata_packet rp; | |
4a744367 JD |
807 | char *data = NULL; |
808 | ssize_t ret_len; | |
809 | ||
8ace20bf MD |
810 | if (lttng_live_should_quit()) { |
811 | ret = -1; | |
812 | goto end; | |
813 | } | |
814 | ||
9abca178 | 815 | rq.stream_id = htobe64(metadata_stream->id); |
4a744367 | 816 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_METADATA); |
259863bd | 817 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); |
e11a3d28 | 818 | cmd.cmd_version = htobe32(0); |
4a744367 | 819 | |
b7e8a8e1 | 820 | ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd)); |
4a744367 | 821 | if (ret_len < 0) { |
79620497 | 822 | perror("[error] Error sending cmd"); |
4a744367 JD |
823 | goto error; |
824 | } | |
825 | assert(ret_len == sizeof(cmd)); | |
826 | ||
b7e8a8e1 | 827 | ret_len = lttng_live_send(ctx->control_sock, &rq, sizeof(rq)); |
4a744367 | 828 | if (ret_len < 0) { |
79620497 | 829 | perror("[error] Error sending get_metadata request"); |
4a744367 JD |
830 | goto error; |
831 | } | |
832 | assert(ret_len == sizeof(rq)); | |
833 | ||
b7e8a8e1 | 834 | ret_len = lttng_live_recv(ctx->control_sock, &rp, sizeof(rp)); |
f8612f31 MD |
835 | if (ret_len == 0) { |
836 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
837 | goto error; |
838 | } | |
4a744367 | 839 | if (ret_len < 0) { |
79620497 | 840 | perror("[error] Error receiving metadata response"); |
4a744367 JD |
841 | goto error; |
842 | } | |
843 | assert(ret_len == sizeof(rp)); | |
844 | ||
845 | switch (be32toh(rp.status)) { | |
846 | case LTTNG_VIEWER_METADATA_OK: | |
847 | printf_verbose("get_metadata : OK\n"); | |
848 | break; | |
849 | case LTTNG_VIEWER_NO_NEW_METADATA: | |
850 | printf_verbose("get_metadata : NO NEW\n"); | |
9abca178 | 851 | ret = 0; |
4a744367 JD |
852 | goto end; |
853 | case LTTNG_VIEWER_METADATA_ERR: | |
854 | printf_verbose("get_metadata : ERR\n"); | |
8ace20bf | 855 | goto error; |
4a744367 JD |
856 | default: |
857 | printf_verbose("get_metadata : UNKNOWN\n"); | |
8ace20bf | 858 | goto error; |
4a744367 JD |
859 | } |
860 | ||
861 | len = be64toh(rp.len); | |
862 | printf_verbose("Writing %" PRIu64" bytes to metadata\n", len); | |
863 | if (len <= 0) { | |
8ace20bf | 864 | goto error; |
4a744367 JD |
865 | } |
866 | ||
867 | data = zmalloc(len); | |
868 | if (!data) { | |
869 | perror("relay data zmalloc"); | |
4a744367 JD |
870 | goto error; |
871 | } | |
b7e8a8e1 | 872 | ret_len = lttng_live_recv(ctx->control_sock, data, len); |
f8612f31 MD |
873 | if (ret_len == 0) { |
874 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
8ace20bf | 875 | goto error_free_data; |
f8612f31 | 876 | } |
4a744367 | 877 | if (ret_len < 0) { |
79620497 | 878 | perror("[error] Error receiving trace packet"); |
8ace20bf | 879 | goto error_free_data; |
4a744367 JD |
880 | } |
881 | assert(ret_len == len); | |
882 | ||
883 | do { | |
af701dc4 JD |
884 | ret_len = fwrite(data, 1, len, |
885 | metadata_stream->metadata_fp_write); | |
4a744367 JD |
886 | } while (ret_len < 0 && errno == EINTR); |
887 | if (ret_len < 0) { | |
af701dc4 | 888 | fprintf(stderr, "[error] Writing in the metadata fp\n"); |
8ace20bf | 889 | goto error_free_data; |
4a744367 JD |
890 | } |
891 | assert(ret_len == len); | |
af701dc4 | 892 | metadata_stream->metadata_len += len; |
8ace20bf | 893 | free(data); |
9abca178 | 894 | ret = len; |
8ace20bf MD |
895 | end: |
896 | return ret; | |
4a744367 | 897 | |
8ace20bf | 898 | error_free_data: |
4a744367 | 899 | free(data); |
4a744367 | 900 | error: |
8ace20bf | 901 | return -1; |
4a744367 JD |
902 | } |
903 | ||
9abca178 JD |
904 | /* |
905 | * Return 0 on success, a negative value on error. | |
906 | */ | |
907 | static | |
908 | int get_new_metadata(struct lttng_live_ctx *ctx, | |
af701dc4 JD |
909 | struct lttng_live_viewer_stream *viewer_stream, |
910 | char **metadata_buf) | |
9abca178 JD |
911 | { |
912 | int ret = 0; | |
913 | struct lttng_live_viewer_stream *metadata_stream; | |
73b2b0d1 | 914 | size_t size, len_read = 0; |
9abca178 JD |
915 | |
916 | metadata_stream = viewer_stream->ctf_trace->metadata_stream; | |
50d207af JD |
917 | if (!metadata_stream) { |
918 | fprintf(stderr, "[error] No metadata stream\n"); | |
919 | ret = -1; | |
920 | goto error; | |
921 | } | |
af701dc4 JD |
922 | metadata_stream->metadata_len = 0; |
923 | ret = open_metadata_fp_write(metadata_stream, metadata_buf, &size); | |
924 | if (ret < 0) { | |
925 | goto error; | |
926 | } | |
9abca178 JD |
927 | |
928 | do { | |
d1694e41 JD |
929 | if (lttng_live_should_quit()) { |
930 | ret = -1; | |
931 | goto error; | |
932 | } | |
9abca178 JD |
933 | /* |
934 | * get_one_metadata_packet returns the number of bytes | |
935 | * received, 0 when we have received everything, a | |
936 | * negative value on error. | |
937 | */ | |
938 | ret = get_one_metadata_packet(ctx, metadata_stream); | |
c111d5d7 MD |
939 | if (ret > 0) { |
940 | len_read += ret; | |
941 | } | |
85e2085e MD |
942 | if (!len_read) { |
943 | (void) poll(NULL, 0, ACTIVE_POLL_DELAY); | |
944 | } | |
c111d5d7 | 945 | } while (ret > 0 || !len_read); |
9abca178 | 946 | |
91bb0024 MD |
947 | if (babeltrace_close_memstream(metadata_buf, &size, |
948 | metadata_stream->metadata_fp_write)) { | |
949 | perror("babeltrace_close_memstream"); | |
950 | } | |
af701dc4 JD |
951 | metadata_stream->metadata_fp_write = NULL; |
952 | ||
953 | error: | |
9abca178 JD |
954 | return ret; |
955 | } | |
956 | ||
fb6b45aa JD |
957 | /* |
958 | * Assign the fields from a lttng_viewer_index to a packet_index. | |
959 | */ | |
960 | static | |
961 | void lttng_index_to_packet_index(struct lttng_viewer_index *lindex, | |
962 | struct packet_index *pindex) | |
963 | { | |
964 | assert(lindex); | |
965 | assert(pindex); | |
966 | ||
967 | pindex->offset = be64toh(lindex->offset); | |
968 | pindex->packet_size = be64toh(lindex->packet_size); | |
969 | pindex->content_size = be64toh(lindex->content_size); | |
970 | pindex->ts_cycles.timestamp_begin = be64toh(lindex->timestamp_begin); | |
971 | pindex->ts_cycles.timestamp_end = be64toh(lindex->timestamp_end); | |
972 | pindex->events_discarded = be64toh(lindex->events_discarded); | |
973 | } | |
974 | ||
4a744367 JD |
975 | /* |
976 | * Get one index for a stream. | |
977 | * | |
978 | * Returns 0 on success or a negative value on error. | |
979 | */ | |
980 | static | |
981 | int get_next_index(struct lttng_live_ctx *ctx, | |
982 | struct lttng_live_viewer_stream *viewer_stream, | |
fb6b45aa | 983 | struct packet_index *index, uint64_t *stream_id) |
4a744367 JD |
984 | { |
985 | struct lttng_viewer_cmd cmd; | |
986 | struct lttng_viewer_get_next_index rq; | |
4a744367 | 987 | int ret; |
4a744367 | 988 | ssize_t ret_len; |
fb6b45aa | 989 | struct lttng_viewer_index *rp = &viewer_stream->current_index; |
4a744367 JD |
990 | |
991 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_NEXT_INDEX); | |
259863bd | 992 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); |
e11a3d28 | 993 | cmd.cmd_version = htobe32(0); |
4a744367 JD |
994 | |
995 | memset(&rq, 0, sizeof(rq)); | |
996 | rq.stream_id = htobe64(viewer_stream->id); | |
997 | ||
998 | retry: | |
8ace20bf MD |
999 | if (lttng_live_should_quit()) { |
1000 | ret = -1; | |
1001 | goto end; | |
1002 | } | |
b7e8a8e1 | 1003 | ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd)); |
4a744367 | 1004 | if (ret_len < 0) { |
79620497 | 1005 | perror("[error] Error sending cmd"); |
4a744367 JD |
1006 | goto error; |
1007 | } | |
1008 | assert(ret_len == sizeof(cmd)); | |
1009 | ||
b7e8a8e1 | 1010 | ret_len = lttng_live_send(ctx->control_sock, &rq, sizeof(rq)); |
4a744367 | 1011 | if (ret_len < 0) { |
79620497 | 1012 | perror("[error] Error sending get_next_index request"); |
4a744367 JD |
1013 | goto error; |
1014 | } | |
1015 | assert(ret_len == sizeof(rq)); | |
1016 | ||
fb6b45aa | 1017 | ret_len = lttng_live_recv(ctx->control_sock, rp, sizeof(*rp)); |
f8612f31 MD |
1018 | if (ret_len == 0) { |
1019 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
1020 | goto error; |
1021 | } | |
4a744367 | 1022 | if (ret_len < 0) { |
79620497 | 1023 | perror("[error] Error receiving index response"); |
4a744367 JD |
1024 | goto error; |
1025 | } | |
fb6b45aa | 1026 | assert(ret_len == sizeof(*rp)); |
4a744367 | 1027 | |
fb6b45aa | 1028 | rp->flags = be32toh(rp->flags); |
4a744367 | 1029 | |
fb6b45aa | 1030 | switch (be32toh(rp->status)) { |
4a744367 JD |
1031 | case LTTNG_VIEWER_INDEX_INACTIVE: |
1032 | printf_verbose("get_next_index: inactive\n"); | |
1033 | memset(index, 0, sizeof(struct packet_index)); | |
fb6b45aa JD |
1034 | index->ts_cycles.timestamp_end = be64toh(rp->timestamp_end); |
1035 | *stream_id = be64toh(rp->stream_id); | |
4a744367 JD |
1036 | break; |
1037 | case LTTNG_VIEWER_INDEX_OK: | |
1038 | printf_verbose("get_next_index: Ok, need metadata update : %u\n", | |
fb6b45aa JD |
1039 | rp->flags & LTTNG_VIEWER_FLAG_NEW_METADATA); |
1040 | lttng_index_to_packet_index(rp, index); | |
1041 | *stream_id = be64toh(rp->stream_id); | |
1042 | viewer_stream->data_pending = 1; | |
4a744367 | 1043 | |
fb6b45aa | 1044 | if (rp->flags & LTTNG_VIEWER_FLAG_NEW_METADATA) { |
50d207af JD |
1045 | ret = append_metadata(ctx, viewer_stream); |
1046 | if (ret) | |
4a744367 | 1047 | goto error; |
4a744367 | 1048 | } |
fb6b45aa | 1049 | if (rp->flags & LTTNG_VIEWER_FLAG_NEW_STREAM) { |
73b2b0d1 | 1050 | printf_verbose("get_next_index: need new streams\n"); |
2acdc547 | 1051 | ret = ask_new_streams(ctx); |
7840bb08 | 1052 | if (ret < 0) { |
2acdc547 | 1053 | goto error; |
7840bb08 JD |
1054 | } else if (ret > 0) { |
1055 | ret = add_traces(ctx); | |
1056 | if (ret < 0) { | |
1057 | goto error; | |
1058 | } | |
1059 | } | |
2acdc547 | 1060 | } |
4a744367 JD |
1061 | break; |
1062 | case LTTNG_VIEWER_INDEX_RETRY: | |
1063 | printf_verbose("get_next_index: retry\n"); | |
85e2085e | 1064 | (void) poll(NULL, 0, ACTIVE_POLL_DELAY); |
4a744367 JD |
1065 | goto retry; |
1066 | case LTTNG_VIEWER_INDEX_HUP: | |
1067 | printf_verbose("get_next_index: stream hung up\n"); | |
1068 | viewer_stream->id = -1ULL; | |
4a744367 | 1069 | index->offset = EOF; |
2acdc547 | 1070 | ctx->session->stream_count--; |
4a744367 JD |
1071 | break; |
1072 | case LTTNG_VIEWER_INDEX_ERR: | |
1073 | fprintf(stderr, "[error] get_next_index: error\n"); | |
4a744367 JD |
1074 | goto error; |
1075 | default: | |
1076 | fprintf(stderr, "[error] get_next_index: unkwown value\n"); | |
4a744367 JD |
1077 | goto error; |
1078 | } | |
4a744367 | 1079 | ret = 0; |
8ace20bf MD |
1080 | end: |
1081 | return ret; | |
4a744367 JD |
1082 | |
1083 | error: | |
8ace20bf | 1084 | return -1; |
4a744367 JD |
1085 | } |
1086 | ||
fb6b45aa JD |
1087 | static |
1088 | void read_packet_header(struct ctf_stream_pos *pos, | |
1089 | struct ctf_file_stream *file_stream) | |
1090 | { | |
1091 | int ret; | |
1092 | ||
1093 | /* update trace_packet_header and stream_packet_context */ | |
fcf10417 JG |
1094 | if (!(pos->prot & PROT_WRITE) && |
1095 | file_stream->parent.trace_packet_header) { | |
fb6b45aa JD |
1096 | /* Read packet header */ |
1097 | ret = generic_rw(&pos->parent, | |
1098 | &file_stream->parent.trace_packet_header->p); | |
1099 | if (ret) { | |
1100 | pos->offset = EOF; | |
1101 | fprintf(stderr, "[error] trace packet " | |
1102 | "header read failed\n"); | |
1103 | goto end; | |
1104 | } | |
1105 | } | |
fcf10417 JG |
1106 | if (!(pos->prot & PROT_WRITE) && |
1107 | file_stream->parent.stream_packet_context) { | |
fb6b45aa JD |
1108 | /* Read packet context */ |
1109 | ret = generic_rw(&pos->parent, | |
1110 | &file_stream->parent.stream_packet_context->p); | |
1111 | if (ret) { | |
1112 | pos->offset = EOF; | |
1113 | fprintf(stderr, "[error] stream packet " | |
1114 | "context read failed\n"); | |
1115 | goto end; | |
1116 | } | |
1117 | } | |
1118 | pos->data_offset = pos->offset; | |
1119 | ||
1120 | end: | |
1121 | return; | |
1122 | } | |
1123 | ||
1124 | /* | |
1125 | * Handle the seek parameters. | |
1126 | * Returns 0 if the packet_seek can continue, a positive value to | |
1127 | * cleanly exit the packet_seek, a negative value on error. | |
1128 | */ | |
1129 | static | |
1130 | int handle_seek_position(size_t index, int whence, | |
1131 | struct lttng_live_viewer_stream *viewer_stream, | |
1132 | struct ctf_stream_pos *pos, | |
1133 | struct ctf_file_stream *file_stream) | |
1134 | { | |
6a724a1e | 1135 | int ret = 0; |
fb6b45aa JD |
1136 | |
1137 | switch (whence) { | |
1138 | case SEEK_CUR: | |
1139 | ret = 0; | |
1140 | goto end; | |
1141 | case SEEK_SET: | |
1142 | /* | |
1143 | * We only allow to seek to 0. | |
1144 | */ | |
1145 | if (index != 0) { | |
1146 | fprintf(stderr, "[error] Arbitrary seek in lttng-live " | |
1147 | "trace not supported\n"); | |
1148 | pos->offset = EOF; | |
1149 | ret = -1; | |
1150 | goto end; | |
1151 | } | |
1152 | ||
1153 | ret = 0; | |
1154 | goto end; | |
1155 | ||
1156 | default: | |
1157 | fprintf(stderr, "[error] Invalid seek parameter\n"); | |
1158 | assert(0); | |
1159 | } | |
1160 | ||
1161 | end: | |
1162 | return ret; | |
1163 | } | |
1164 | ||
b5a1fa45 | 1165 | static |
4a744367 JD |
1166 | void ctf_live_packet_seek(struct bt_stream_pos *stream_pos, size_t index, |
1167 | int whence) | |
1168 | { | |
1169 | struct ctf_stream_pos *pos; | |
1170 | struct ctf_file_stream *file_stream; | |
f1f52630 | 1171 | struct packet_index *prev_index = NULL, *cur_index; |
4a744367 JD |
1172 | struct lttng_live_viewer_stream *viewer_stream; |
1173 | struct lttng_live_session *session; | |
fb6b45aa | 1174 | uint64_t stream_id = -1ULL; |
4a744367 JD |
1175 | int ret; |
1176 | ||
4a744367 JD |
1177 | pos = ctf_pos(stream_pos); |
1178 | file_stream = container_of(pos, struct ctf_file_stream, pos); | |
1179 | viewer_stream = (struct lttng_live_viewer_stream *) pos->priv; | |
1180 | session = viewer_stream->session; | |
1181 | ||
fb6b45aa JD |
1182 | ret = handle_seek_position(index, whence, viewer_stream, pos, |
1183 | file_stream); | |
1184 | if (ret != 0) { | |
1185 | return; | |
1186 | } | |
1187 | ||
1188 | retry: | |
f1f52630 MD |
1189 | switch (pos->packet_index->len) { |
1190 | case 0: | |
1191 | g_array_set_size(pos->packet_index, 1); | |
1192 | cur_index = &g_array_index(pos->packet_index, | |
1193 | struct packet_index, 0); | |
1194 | break; | |
1195 | case 1: | |
1196 | g_array_set_size(pos->packet_index, 2); | |
1197 | prev_index = &g_array_index(pos->packet_index, | |
1198 | struct packet_index, 0); | |
1199 | cur_index = &g_array_index(pos->packet_index, | |
1200 | struct packet_index, 1); | |
1201 | break; | |
1202 | case 2: | |
1203 | g_array_index(pos->packet_index, | |
1204 | struct packet_index, 0) = | |
1205 | g_array_index(pos->packet_index, | |
1206 | struct packet_index, 1); | |
1207 | prev_index = &g_array_index(pos->packet_index, | |
1208 | struct packet_index, 0); | |
1209 | cur_index = &g_array_index(pos->packet_index, | |
1210 | struct packet_index, 1); | |
1211 | break; | |
1212 | default: | |
1213 | abort(); | |
1214 | break; | |
1215 | } | |
fb6b45aa JD |
1216 | |
1217 | if (viewer_stream->data_pending) { | |
1218 | lttng_index_to_packet_index(&viewer_stream->current_index, cur_index); | |
1219 | } else { | |
1220 | printf_verbose("get_next_index for stream %" PRIu64 "\n", viewer_stream->id); | |
1221 | ret = get_next_index(session->ctx, viewer_stream, cur_index, &stream_id); | |
1222 | if (ret < 0) { | |
1223 | pos->offset = EOF; | |
1224 | if (!lttng_live_should_quit()) { | |
1225 | fprintf(stderr, "[error] get_next_index failed\n"); | |
1226 | } | |
1227 | return; | |
e29395a8 | 1228 | } |
fb6b45aa JD |
1229 | printf_verbose("Index received : packet_size : %" PRIu64 |
1230 | ", offset %" PRIu64 ", content_size %" PRIu64 | |
1231 | ", timestamp_end : %" PRIu64 "\n", | |
1232 | cur_index->packet_size, cur_index->offset, | |
1233 | cur_index->content_size, | |
1234 | cur_index->ts_cycles.timestamp_end); | |
1235 | ||
1236 | } | |
1237 | ||
1238 | /* | |
1239 | * On the first time we receive an index, the stream_id needs to | |
1240 | * be set for the stream in order to use it, we don't want any | |
1241 | * data at this stage. | |
1242 | */ | |
1243 | if (file_stream->parent.stream_id == -1ULL) { | |
1244 | /* | |
1245 | * Warning: with lttng-tools < 2.4.2, the beacon does not | |
1246 | * contain the real stream ID, it is memset to 0, so this | |
1247 | * might create a problem when a session has multiple | |
1248 | * channels. We can't detect it at this stage, lttng-tools | |
1249 | * has to be upgraded to fix this problem. | |
1250 | */ | |
1251 | printf_verbose("Assigning stream_id %" PRIu64 "\n", | |
1252 | stream_id); | |
1253 | file_stream->parent.stream_id = stream_id; | |
1254 | viewer_stream->ctf_stream_id = stream_id; | |
1255 | ||
4a744367 JD |
1256 | return; |
1257 | } | |
1258 | ||
f1f52630 MD |
1259 | pos->packet_size = cur_index->packet_size; |
1260 | pos->content_size = cur_index->content_size; | |
4a744367 | 1261 | pos->mmap_base_offset = 0; |
f1f52630 | 1262 | if (cur_index->offset == EOF) { |
4a744367 JD |
1263 | pos->offset = EOF; |
1264 | } else { | |
1265 | pos->offset = 0; | |
1266 | } | |
1267 | ||
f1f52630 | 1268 | if (cur_index->content_size == 0) { |
fb6b45aa JD |
1269 | if (file_stream->parent.stream_class) { |
1270 | file_stream->parent.cycles_timestamp = | |
f1f52630 | 1271 | cur_index->ts_cycles.timestamp_end; |
fb6b45aa JD |
1272 | file_stream->parent.real_timestamp = ctf_get_real_timestamp( |
1273 | &file_stream->parent, | |
1274 | cur_index->ts_cycles.timestamp_end); | |
1275 | } | |
4a744367 | 1276 | } else { |
fb6b45aa JD |
1277 | if (file_stream->parent.stream_class) { |
1278 | /* Convert the timestamps and append to the real_index. */ | |
1279 | cur_index->ts_real.timestamp_begin = ctf_get_real_timestamp( | |
1280 | &file_stream->parent, | |
1281 | cur_index->ts_cycles.timestamp_begin); | |
1282 | cur_index->ts_real.timestamp_end = ctf_get_real_timestamp( | |
1283 | &file_stream->parent, | |
1284 | cur_index->ts_cycles.timestamp_end); | |
1285 | } | |
f1f52630 MD |
1286 | |
1287 | ctf_update_current_packet_index(&file_stream->parent, | |
1288 | prev_index, cur_index); | |
1289 | ||
1290 | file_stream->parent.cycles_timestamp = | |
1291 | cur_index->ts_cycles.timestamp_begin; | |
1292 | file_stream->parent.real_timestamp = | |
1293 | cur_index->ts_real.timestamp_begin; | |
4a744367 JD |
1294 | } |
1295 | ||
1296 | if (pos->packet_size == 0 || pos->offset == EOF) { | |
1297 | goto end; | |
1298 | } | |
1299 | ||
1300 | printf_verbose("get_data_packet for stream %" PRIu64 "\n", | |
1301 | viewer_stream->id); | |
1302 | ret = get_data_packet(session->ctx, pos, viewer_stream, | |
c1e8ac81 | 1303 | cur_index->offset, |
f1f52630 | 1304 | cur_index->packet_size / CHAR_BIT); |
4a744367 JD |
1305 | if (ret == -2) { |
1306 | goto retry; | |
1307 | } else if (ret < 0) { | |
1308 | pos->offset = EOF; | |
e29395a8 JG |
1309 | if (!lttng_live_should_quit()) { |
1310 | fprintf(stderr, "[error] get_data_packet failed\n"); | |
1311 | } | |
4a744367 JD |
1312 | return; |
1313 | } | |
fb6b45aa | 1314 | viewer_stream->data_pending = 0; |
4a744367 | 1315 | |
fb6b45aa | 1316 | read_packet_header(pos, file_stream); |
4a744367 JD |
1317 | |
1318 | end: | |
1319 | return; | |
1320 | } | |
1321 | ||
2acdc547 JD |
1322 | int lttng_live_create_viewer_session(struct lttng_live_ctx *ctx) |
1323 | { | |
1324 | struct lttng_viewer_cmd cmd; | |
1325 | struct lttng_viewer_create_session_response resp; | |
1326 | int ret; | |
1327 | ssize_t ret_len; | |
1328 | ||
8ace20bf MD |
1329 | if (lttng_live_should_quit()) { |
1330 | ret = -1; | |
1331 | goto end; | |
1332 | } | |
1333 | ||
2acdc547 | 1334 | cmd.cmd = htobe32(LTTNG_VIEWER_CREATE_SESSION); |
259863bd | 1335 | cmd.data_size = htobe64((uint64_t) 0); |
e11a3d28 | 1336 | cmd.cmd_version = htobe32(0); |
2acdc547 | 1337 | |
b7e8a8e1 | 1338 | ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd)); |
2acdc547 | 1339 | if (ret_len < 0) { |
79620497 | 1340 | perror("[error] Error sending cmd"); |
2acdc547 JD |
1341 | goto error; |
1342 | } | |
1343 | assert(ret_len == sizeof(cmd)); | |
1344 | ||
b7e8a8e1 | 1345 | ret_len = lttng_live_recv(ctx->control_sock, &resp, sizeof(resp)); |
f8612f31 MD |
1346 | if (ret_len == 0) { |
1347 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
1348 | goto error; |
1349 | } | |
2acdc547 | 1350 | if (ret_len < 0) { |
79620497 | 1351 | perror("[error] Error receiving create session reply"); |
2acdc547 JD |
1352 | goto error; |
1353 | } | |
1354 | assert(ret_len == sizeof(resp)); | |
1355 | ||
1356 | if (be32toh(resp.status) != LTTNG_VIEWER_CREATE_SESSION_OK) { | |
1357 | fprintf(stderr, "[error] Error creating viewer session\n"); | |
2acdc547 JD |
1358 | goto error; |
1359 | } | |
1360 | ret = 0; | |
8ace20bf MD |
1361 | end: |
1362 | return ret; | |
2acdc547 JD |
1363 | |
1364 | error: | |
8ace20bf | 1365 | return -1; |
2acdc547 JD |
1366 | } |
1367 | ||
1368 | static | |
1369 | int del_traces(gpointer key, gpointer value, gpointer user_data) | |
4a744367 JD |
1370 | { |
1371 | struct bt_context *bt_ctx = user_data; | |
1372 | struct lttng_live_ctf_trace *trace = value; | |
1373 | int ret; | |
1374 | ||
1375 | ret = bt_context_remove_trace(bt_ctx, trace->trace_id); | |
1376 | if (ret < 0) | |
1377 | fprintf(stderr, "[error] removing trace from context\n"); | |
1378 | ||
1379 | /* remove the key/value pair from the HT. */ | |
1380 | return 1; | |
1381 | } | |
1382 | ||
2acdc547 | 1383 | static |
7840bb08 JD |
1384 | int add_one_trace(struct lttng_live_ctx *ctx, |
1385 | struct lttng_live_ctf_trace *trace) | |
4a744367 | 1386 | { |
9abca178 | 1387 | int i, ret; |
7840bb08 | 1388 | struct bt_context *bt_ctx = ctx->bt_ctx; |
4a744367 JD |
1389 | struct lttng_live_viewer_stream *stream; |
1390 | struct bt_mmap_stream *new_mmap_stream; | |
1391 | struct bt_mmap_stream_list mmap_list; | |
150595c4 JD |
1392 | struct bt_trace_descriptor *td; |
1393 | struct bt_trace_handle *handle; | |
4a744367 | 1394 | |
b5a1fa45 JD |
1395 | /* |
1396 | * We don't know how many streams we will receive for a trace, so | |
1397 | * once we are done receiving the traces, we add all the traces | |
1398 | * received to the bt_context. | |
1399 | * We can receive streams during the attach command or the | |
1400 | * get_new_streams, so we have to make sure not to add multiple | |
1401 | * times the same traces. | |
1402 | * If a trace is already in the context, we just skip this function. | |
1403 | */ | |
7840bb08 JD |
1404 | if (trace->in_use) { |
1405 | ret = 0; | |
1406 | goto end; | |
1407 | } | |
2acdc547 | 1408 | |
4a744367 JD |
1409 | BT_INIT_LIST_HEAD(&mmap_list.head); |
1410 | ||
1411 | for (i = 0; i < trace->streams->len; i++) { | |
1412 | stream = g_ptr_array_index(trace->streams, i); | |
4a744367 JD |
1413 | |
1414 | if (!stream->metadata_flag) { | |
1415 | new_mmap_stream = zmalloc(sizeof(struct bt_mmap_stream)); | |
1416 | new_mmap_stream->priv = (void *) stream; | |
1417 | new_mmap_stream->fd = -1; | |
1418 | bt_list_add(&new_mmap_stream->list, &mmap_list.head); | |
1419 | } else { | |
af701dc4 JD |
1420 | char *metadata_buf = NULL; |
1421 | ||
4a744367 | 1422 | /* Get all possible metadata before starting */ |
af701dc4 JD |
1423 | ret = get_new_metadata(ctx, stream, &metadata_buf); |
1424 | if (ret) { | |
1425 | free(metadata_buf); | |
1426 | goto end_free; | |
1427 | } | |
1428 | if (!stream->metadata_len) { | |
1429 | fprintf(stderr, "[error] empty metadata\n"); | |
1430 | ret = -1; | |
1431 | free(metadata_buf); | |
1432 | goto end_free; | |
1433 | } | |
1434 | ||
1435 | trace->metadata_fp = babeltrace_fmemopen(metadata_buf, | |
1436 | stream->metadata_len, "rb"); | |
1437 | if (!trace->metadata_fp) { | |
1438 | perror("Metadata fmemopen"); | |
1439 | ret = -1; | |
1440 | free(metadata_buf); | |
9abca178 | 1441 | goto end_free; |
af701dc4 | 1442 | } |
4a744367 JD |
1443 | } |
1444 | } | |
1445 | ||
1446 | if (!trace->metadata_fp) { | |
1447 | fprintf(stderr, "[error] No metadata stream opened\n"); | |
7840bb08 | 1448 | ret = -1; |
4a744367 JD |
1449 | goto end_free; |
1450 | } | |
1451 | ||
1452 | ret = bt_context_add_trace(bt_ctx, NULL, "ctf", | |
1453 | ctf_live_packet_seek, &mmap_list, trace->metadata_fp); | |
1454 | if (ret < 0) { | |
1455 | fprintf(stderr, "[error] Error adding trace\n"); | |
7840bb08 | 1456 | ret = -1; |
4a744367 JD |
1457 | goto end_free; |
1458 | } | |
af701dc4 JD |
1459 | trace->metadata_stream->metadata_len = 0; |
1460 | ||
150595c4 JD |
1461 | handle = (struct bt_trace_handle *) g_hash_table_lookup( |
1462 | bt_ctx->trace_handles, | |
1463 | (gpointer) (unsigned long) ret); | |
1464 | td = handle->td; | |
1465 | trace->handle = handle; | |
2acdc547 | 1466 | if (bt_ctx->current_iterator) { |
2acdc547 JD |
1467 | bt_iter_add_trace(bt_ctx->current_iterator, td); |
1468 | } | |
1469 | ||
4a744367 | 1470 | trace->trace_id = ret; |
2acdc547 | 1471 | trace->in_use = 1; |
4a744367 JD |
1472 | |
1473 | goto end; | |
1474 | ||
1475 | end_free: | |
1476 | bt_context_put(bt_ctx); | |
1477 | end: | |
7840bb08 JD |
1478 | return ret; |
1479 | } | |
1480 | ||
1481 | static | |
1482 | int add_traces(struct lttng_live_ctx *ctx) | |
1483 | { | |
1484 | int ret; | |
1485 | struct lttng_live_ctf_trace *trace; | |
1486 | GHashTableIter it; | |
1487 | gpointer key; | |
1488 | gpointer value; | |
1489 | ||
1490 | g_hash_table_iter_init(&it, ctx->session->ctf_traces); | |
1491 | while (g_hash_table_iter_next(&it, &key, &value)) { | |
1492 | trace = (struct lttng_live_ctf_trace *) value; | |
1493 | ret = add_one_trace(ctx, trace); | |
1494 | if (ret < 0) { | |
1495 | goto end; | |
1496 | } | |
1497 | } | |
1498 | ||
1499 | ret = 0; | |
1500 | ||
1501 | end: | |
1502 | return ret; | |
4a744367 JD |
1503 | } |
1504 | ||
73b2b0d1 JD |
1505 | /* |
1506 | * Request new streams for a session. | |
1507 | * Returns the number of streams received or a negative value on error. | |
1508 | */ | |
2acdc547 | 1509 | int lttng_live_get_new_streams(struct lttng_live_ctx *ctx, uint64_t id) |
6192b988 JD |
1510 | { |
1511 | struct lttng_viewer_cmd cmd; | |
2acdc547 JD |
1512 | struct lttng_viewer_new_streams_request rq; |
1513 | struct lttng_viewer_new_streams_response rp; | |
1514 | struct lttng_viewer_stream stream; | |
73b2b0d1 | 1515 | int ret, i, nb_streams = 0; |
6192b988 | 1516 | ssize_t ret_len; |
b5a1fa45 | 1517 | uint32_t stream_count; |
6192b988 | 1518 | |
8ace20bf MD |
1519 | if (lttng_live_should_quit()) { |
1520 | ret = -1; | |
1521 | goto end; | |
1522 | } | |
1523 | ||
2acdc547 | 1524 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_NEW_STREAMS); |
259863bd | 1525 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); |
e11a3d28 | 1526 | cmd.cmd_version = htobe32(0); |
6192b988 | 1527 | |
2acdc547 JD |
1528 | memset(&rq, 0, sizeof(rq)); |
1529 | rq.session_id = htobe64(id); | |
1530 | ||
b7e8a8e1 | 1531 | ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd)); |
6192b988 | 1532 | if (ret_len < 0) { |
79620497 | 1533 | perror("[error] Error sending cmd"); |
6192b988 JD |
1534 | goto error; |
1535 | } | |
1536 | assert(ret_len == sizeof(cmd)); | |
1537 | ||
b7e8a8e1 | 1538 | ret_len = lttng_live_send(ctx->control_sock, &rq, sizeof(rq)); |
6192b988 | 1539 | if (ret_len < 0) { |
79620497 | 1540 | perror("[error] Error sending get_new_streams request"); |
6192b988 JD |
1541 | goto error; |
1542 | } | |
2acdc547 | 1543 | assert(ret_len == sizeof(rq)); |
6192b988 | 1544 | |
b7e8a8e1 | 1545 | ret_len = lttng_live_recv(ctx->control_sock, &rp, sizeof(rp)); |
f8612f31 MD |
1546 | if (ret_len == 0) { |
1547 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
1548 | goto error; |
1549 | } | |
2acdc547 | 1550 | if (ret_len < 0) { |
79620497 | 1551 | perror("[error] Error receiving get_new_streams response"); |
6192b988 JD |
1552 | goto error; |
1553 | } | |
2acdc547 JD |
1554 | assert(ret_len == sizeof(rp)); |
1555 | ||
1556 | switch(be32toh(rp.status)) { | |
1557 | case LTTNG_VIEWER_NEW_STREAMS_OK: | |
1558 | break; | |
1559 | case LTTNG_VIEWER_NEW_STREAMS_NO_NEW: | |
1560 | ret = 0; | |
1561 | goto end; | |
1562 | case LTTNG_VIEWER_NEW_STREAMS_HUP: | |
1563 | ret = -LTTNG_VIEWER_NEW_STREAMS_HUP; | |
1564 | goto end; | |
1565 | case LTTNG_VIEWER_NEW_STREAMS_ERR: | |
1566 | fprintf(stderr, "[error] get_new_streams error\n"); | |
8ace20bf | 1567 | goto error; |
2acdc547 JD |
1568 | default: |
1569 | fprintf(stderr, "[error] Unknown return code %u\n", | |
1570 | be32toh(rp.status)); | |
8ace20bf | 1571 | goto error; |
2acdc547 JD |
1572 | } |
1573 | ||
b5a1fa45 JD |
1574 | stream_count = be32toh(rp.streams_count); |
1575 | ctx->session->stream_count += stream_count; | |
2acdc547 JD |
1576 | /* |
1577 | * When the session is created but not started, we do an active wait | |
1578 | * until it starts. It allows the viewer to start processing the trace | |
1579 | * as soon as the session starts. | |
1580 | */ | |
1581 | if (ctx->session->stream_count == 0) { | |
1582 | ret = 0; | |
1583 | goto end; | |
1584 | } | |
1585 | printf_verbose("Waiting for %" PRIu64 " streams:\n", | |
1586 | ctx->session->stream_count); | |
1587 | ctx->session->streams = g_new0(struct lttng_live_viewer_stream, | |
1588 | ctx->session->stream_count); | |
b5a1fa45 | 1589 | for (i = 0; i < stream_count; i++) { |
b7e8a8e1 | 1590 | ret_len = lttng_live_recv(ctx->control_sock, &stream, sizeof(stream)); |
f8612f31 MD |
1591 | if (ret_len == 0) { |
1592 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
1593 | goto error; |
1594 | } | |
2acdc547 | 1595 | if (ret_len < 0) { |
79620497 | 1596 | perror("[error] Error receiving stream"); |
2acdc547 JD |
1597 | goto error; |
1598 | } | |
1599 | assert(ret_len == sizeof(stream)); | |
1600 | stream.path_name[LTTNG_VIEWER_PATH_MAX - 1] = '\0'; | |
1601 | stream.channel_name[LTTNG_VIEWER_NAME_MAX - 1] = '\0'; | |
1602 | ||
1603 | printf_verbose(" stream %" PRIu64 " : %s/%s\n", | |
1604 | be64toh(stream.id), stream.path_name, | |
1605 | stream.channel_name); | |
1606 | ctx->session->streams[i].id = be64toh(stream.id); | |
1607 | ctx->session->streams[i].session = ctx->session; | |
1608 | ||
2acdc547 | 1609 | ctx->session->streams[i].mmap_size = 0; |
fb6b45aa | 1610 | ctx->session->streams[i].ctf_stream_id = -1ULL; |
2acdc547 JD |
1611 | |
1612 | if (be32toh(stream.metadata_flag)) { | |
2acdc547 | 1613 | ctx->session->streams[i].metadata_flag = 1; |
2acdc547 JD |
1614 | } |
1615 | ret = lttng_live_ctf_trace_assign(&ctx->session->streams[i], | |
1616 | be64toh(stream.ctf_trace_id)); | |
1617 | if (ret < 0) { | |
1618 | goto error; | |
1619 | } | |
73b2b0d1 | 1620 | nb_streams++; |
2acdc547 JD |
1621 | |
1622 | } | |
73b2b0d1 | 1623 | ret = nb_streams; |
2acdc547 | 1624 | end: |
6192b988 | 1625 | return ret; |
8ace20bf MD |
1626 | |
1627 | error: | |
1628 | return -1; | |
6192b988 JD |
1629 | } |
1630 | ||
28756729 | 1631 | int lttng_live_read(struct lttng_live_ctx *ctx) |
4a744367 | 1632 | { |
28756729 JG |
1633 | int ret = -1; |
1634 | int i; | |
4a744367 JD |
1635 | struct bt_ctf_iter *iter; |
1636 | const struct bt_ctf_event *event; | |
1637 | struct bt_iter_pos begin_pos; | |
1638 | struct bt_trace_descriptor *td_write; | |
1639 | struct bt_format *fmt_write; | |
1640 | struct ctf_text_stream_pos *sout; | |
2acdc547 | 1641 | uint64_t id; |
4a744367 | 1642 | |
2acdc547 JD |
1643 | ctx->bt_ctx = bt_context_create(); |
1644 | if (!ctx->bt_ctx) { | |
4a744367 JD |
1645 | fprintf(stderr, "[error] bt_context_create allocation\n"); |
1646 | goto end; | |
1647 | } | |
1648 | ||
1649 | fmt_write = bt_lookup_format(g_quark_from_static_string("text")); | |
1650 | if (!fmt_write) { | |
1651 | fprintf(stderr, "[error] ctf-text error\n"); | |
1652 | goto end; | |
1653 | } | |
1654 | ||
1655 | td_write = fmt_write->open_trace(NULL, O_RDWR, NULL, NULL); | |
1656 | if (!td_write) { | |
1657 | fprintf(stderr, "[error] Error opening output trace\n"); | |
1658 | goto end_free; | |
1659 | } | |
1660 | ||
1661 | sout = container_of(td_write, struct ctf_text_stream_pos, | |
1662 | trace_descriptor); | |
85bb4663 | 1663 | if (!sout->parent.event_cb) { |
4a744367 | 1664 | goto end_free; |
85bb4663 | 1665 | } |
4a744367 | 1666 | |
6192b988 JD |
1667 | ret = lttng_live_create_viewer_session(ctx); |
1668 | if (ret < 0) { | |
1669 | goto end_free; | |
1670 | } | |
1671 | ||
2acdc547 JD |
1672 | for (i = 0; i < ctx->session_ids->len; i++) { |
1673 | id = g_array_index(ctx->session_ids, uint64_t, i); | |
7e5e4176 | 1674 | printf_verbose("Attaching to session %" PRIu64 "\n", id); |
2acdc547 JD |
1675 | ret = lttng_live_attach_session(ctx, id); |
1676 | printf_verbose("Attaching session returns %d\n", ret); | |
1677 | if (ret < 0) { | |
1678 | if (ret == -LTTNG_VIEWER_ATTACH_UNK) { | |
1679 | fprintf(stderr, "[error] Unknown session ID\n"); | |
1680 | } | |
1681 | goto end_free; | |
1682 | } | |
1683 | } | |
1684 | ||
4a744367 | 1685 | /* |
2acdc547 | 1686 | * As long as the session is active, we try to get new streams. |
4a744367 | 1687 | */ |
2acdc547 | 1688 | for (;;) { |
4a744367 JD |
1689 | int flags; |
1690 | ||
8ace20bf | 1691 | if (lttng_live_should_quit()) { |
28756729 | 1692 | ret = 0; |
8ace20bf MD |
1693 | goto end_free; |
1694 | } | |
1695 | ||
2acdc547 | 1696 | while (!ctx->session->stream_count) { |
8ace20bf MD |
1697 | if (lttng_live_should_quit() |
1698 | || ctx->session_ids->len == 0) { | |
28756729 | 1699 | ret = 0; |
4a744367 | 1700 | goto end_free; |
85bb4663 | 1701 | } |
2acdc547 | 1702 | ret = ask_new_streams(ctx); |
85bb4663 | 1703 | if (ret < 0) { |
2acdc547 | 1704 | goto end_free; |
85bb4663 MD |
1705 | } |
1706 | if (!ctx->session->stream_count) { | |
85e2085e | 1707 | (void) poll(NULL, 0, ACTIVE_POLL_DELAY); |
85bb4663 | 1708 | } |
2acdc547 | 1709 | } |
4a744367 | 1710 | |
7840bb08 JD |
1711 | ret = add_traces(ctx); |
1712 | if (ret < 0) { | |
1713 | goto end_free; | |
1714 | } | |
4a744367 JD |
1715 | |
1716 | begin_pos.type = BT_SEEK_BEGIN; | |
2acdc547 | 1717 | iter = bt_ctf_iter_create(ctx->bt_ctx, &begin_pos, NULL); |
4a744367 | 1718 | if (!iter) { |
e29395a8 JG |
1719 | if (lttng_live_should_quit()) { |
1720 | ret = 0; | |
1721 | goto end; | |
1722 | } | |
4a744367 JD |
1723 | fprintf(stderr, "[error] Iterator creation error\n"); |
1724 | goto end; | |
1725 | } | |
1726 | for (;;) { | |
8ace20bf | 1727 | if (lttng_live_should_quit()) { |
28756729 | 1728 | ret = 0; |
8ace20bf MD |
1729 | goto end_free; |
1730 | } | |
4a744367 JD |
1731 | event = bt_ctf_iter_read_event_flags(iter, &flags); |
1732 | if (!(flags & BT_ITER_FLAG_RETRY)) { | |
1733 | if (!event) { | |
1734 | /* End of trace */ | |
1735 | break; | |
1736 | } | |
1737 | ret = sout->parent.event_cb(&sout->parent, | |
1738 | event->parent->stream); | |
1739 | if (ret) { | |
1740 | fprintf(stderr, "[error] Writing " | |
1741 | "event failed.\n"); | |
1742 | goto end_free; | |
1743 | } | |
1744 | } | |
1745 | ret = bt_iter_next(bt_ctf_get_iter(iter)); | |
1746 | if (ret < 0) { | |
1747 | goto end_free; | |
1748 | } | |
1749 | } | |
1750 | bt_ctf_iter_destroy(iter); | |
2acdc547 JD |
1751 | g_hash_table_foreach_remove(ctx->session->ctf_traces, |
1752 | del_traces, ctx->bt_ctx); | |
1753 | ctx->session->stream_count = 0; | |
1754 | } | |
4a744367 JD |
1755 | |
1756 | end_free: | |
2acdc547 | 1757 | bt_context_put(ctx->bt_ctx); |
4a744367 | 1758 | end: |
e29395a8 JG |
1759 | if (lttng_live_should_quit()) { |
1760 | ret = 0; | |
1761 | } | |
28756729 | 1762 | return ret; |
4a744367 | 1763 | } |