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; | |
de417d04 JR |
160 | const size_t cmd_buf_len = sizeof(cmd) + sizeof(connect); |
161 | char cmd_buf[cmd_buf_len]; | |
4a744367 JD |
162 | int ret; |
163 | ssize_t ret_len; | |
164 | ||
8ace20bf MD |
165 | if (lttng_live_should_quit()) { |
166 | ret = -1; | |
167 | goto end; | |
168 | } | |
169 | ||
4a744367 | 170 | cmd.cmd = htobe32(LTTNG_VIEWER_CONNECT); |
259863bd | 171 | cmd.data_size = htobe64((uint64_t) sizeof(connect)); |
e11a3d28 | 172 | cmd.cmd_version = htobe32(0); |
4a744367 | 173 | |
0c3cd7e1 | 174 | connect.viewer_session_id = -1ULL; /* will be set on recv */ |
4a744367 JD |
175 | connect.major = htobe32(LTTNG_LIVE_MAJOR); |
176 | connect.minor = htobe32(LTTNG_LIVE_MINOR); | |
177 | connect.type = htobe32(LTTNG_VIEWER_CLIENT_COMMAND); | |
178 | ||
de417d04 JR |
179 | /* |
180 | * Merge the cmd and connection request to prevent a write-write | |
181 | * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the | |
182 | * second write to be performed quickly in presence of Nagle's algorithm. | |
183 | */ | |
184 | memcpy(cmd_buf, &cmd, sizeof(cmd)); | |
185 | memcpy(cmd_buf + sizeof(cmd), &connect, sizeof(connect)); | |
4a744367 | 186 | |
de417d04 | 187 | ret_len = lttng_live_send(ctx->control_sock, cmd_buf, cmd_buf_len); |
4a744367 | 188 | if (ret_len < 0) { |
de417d04 | 189 | perror("[error] Error sending cmd for establishing session"); |
4a744367 JD |
190 | goto error; |
191 | } | |
de417d04 | 192 | assert(ret_len == cmd_buf_len); |
4a744367 | 193 | |
b7e8a8e1 | 194 | ret_len = lttng_live_recv(ctx->control_sock, &connect, sizeof(connect)); |
f8612f31 MD |
195 | if (ret_len == 0) { |
196 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
197 | goto error; |
198 | } | |
4a744367 | 199 | if (ret_len < 0) { |
79620497 | 200 | perror("[error] Error receiving version"); |
4a744367 JD |
201 | goto error; |
202 | } | |
203 | assert(ret_len == sizeof(connect)); | |
204 | ||
205 | printf_verbose("Received viewer session ID : %" PRIu64 "\n", | |
206 | be64toh(connect.viewer_session_id)); | |
207 | printf_verbose("Relayd version : %u.%u\n", be32toh(connect.major), | |
208 | be32toh(connect.minor)); | |
9aa155c5 JD |
209 | |
210 | if (LTTNG_LIVE_MAJOR != be32toh(connect.major)) { | |
211 | fprintf(stderr, "[error] Incompatible lttng-relayd protocol\n"); | |
212 | goto error; | |
213 | } | |
214 | /* Use the smallest protocol version implemented. */ | |
215 | if (LTTNG_LIVE_MINOR > be32toh(connect.minor)) { | |
216 | ctx->minor = be32toh(connect.minor); | |
217 | } else { | |
218 | ctx->minor = LTTNG_LIVE_MINOR; | |
219 | } | |
220 | ctx->major = LTTNG_LIVE_MAJOR; | |
4a744367 | 221 | ret = 0; |
8ace20bf MD |
222 | end: |
223 | return ret; | |
4a744367 JD |
224 | |
225 | error: | |
8ace20bf MD |
226 | fprintf(stderr, "[error] Unable to establish connection\n"); |
227 | return -1; | |
4a744367 JD |
228 | } |
229 | ||
b5a1fa45 JD |
230 | static |
231 | void free_session_list(GPtrArray *session_list) | |
232 | { | |
233 | int i; | |
234 | struct lttng_live_relay_session *relay_session; | |
235 | ||
236 | for (i = 0; i < session_list->len; i++) { | |
237 | relay_session = g_ptr_array_index(session_list, i); | |
238 | free(relay_session->name); | |
239 | free(relay_session->hostname); | |
240 | } | |
241 | g_ptr_array_free(session_list, TRUE); | |
242 | } | |
243 | ||
244 | static | |
245 | void print_session_list(GPtrArray *session_list, const char *path) | |
246 | { | |
247 | int i; | |
248 | struct lttng_live_relay_session *relay_session; | |
249 | ||
250 | for (i = 0; i < session_list->len; i++) { | |
251 | relay_session = g_ptr_array_index(session_list, i); | |
857eaa68 | 252 | fprintf(LTTNG_LIVE_OUTPUT_FP, "%s/host/%s/%s (timer = %u, " |
b5a1fa45 JD |
253 | "%u stream(s), %u client(s) connected)\n", |
254 | path, relay_session->hostname, | |
255 | relay_session->name, relay_session->timer, | |
256 | relay_session->streams, relay_session->clients); | |
257 | } | |
258 | } | |
259 | ||
260 | static | |
261 | void update_session_list(GPtrArray *session_list, char *hostname, | |
262 | char *session_name, uint32_t streams, uint32_t clients, | |
263 | uint32_t timer) | |
264 | { | |
265 | int i, found = 0; | |
266 | struct lttng_live_relay_session *relay_session; | |
267 | ||
268 | for (i = 0; i < session_list->len; i++) { | |
269 | relay_session = g_ptr_array_index(session_list, i); | |
0206bb4a | 270 | if ((strncmp(relay_session->hostname, hostname, MAXNAMLEN) == 0) && |
b5a1fa45 | 271 | strncmp(relay_session->name, |
0206bb4a | 272 | session_name, MAXNAMLEN) == 0) { |
b5a1fa45 JD |
273 | relay_session->streams += streams; |
274 | if (relay_session->clients < clients) | |
275 | relay_session->clients = clients; | |
276 | found = 1; | |
277 | break; | |
278 | } | |
279 | } | |
280 | if (found) | |
281 | return; | |
282 | ||
283 | relay_session = g_new0(struct lttng_live_relay_session, 1); | |
5ea98697 MJ |
284 | relay_session->hostname = bt_strndup(hostname, MAXNAMLEN); |
285 | relay_session->name = bt_strndup(session_name, MAXNAMLEN); | |
b5a1fa45 JD |
286 | relay_session->clients = clients; |
287 | relay_session->streams = streams; | |
288 | relay_session->timer = timer; | |
289 | g_ptr_array_add(session_list, relay_session); | |
290 | } | |
291 | ||
4a744367 JD |
292 | int lttng_live_list_sessions(struct lttng_live_ctx *ctx, const char *path) |
293 | { | |
294 | struct lttng_viewer_cmd cmd; | |
295 | struct lttng_viewer_list_sessions list; | |
296 | struct lttng_viewer_session lsession; | |
b5a1fa45 | 297 | int i, ret, sessions_count, print_list = 0; |
4a744367 | 298 | ssize_t ret_len; |
b5a1fa45 JD |
299 | uint64_t session_id; |
300 | GPtrArray *session_list = NULL; | |
301 | ||
8ace20bf MD |
302 | if (lttng_live_should_quit()) { |
303 | ret = -1; | |
304 | goto end; | |
305 | } | |
306 | ||
b5a1fa45 JD |
307 | if (strlen(ctx->session_name) == 0) { |
308 | print_list = 1; | |
309 | session_list = g_ptr_array_new(); | |
310 | } | |
4a744367 JD |
311 | |
312 | cmd.cmd = htobe32(LTTNG_VIEWER_LIST_SESSIONS); | |
259863bd | 313 | cmd.data_size = htobe64((uint64_t) 0); |
e11a3d28 | 314 | cmd.cmd_version = htobe32(0); |
4a744367 | 315 | |
b7e8a8e1 | 316 | ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd)); |
4a744367 | 317 | if (ret_len < 0) { |
79620497 | 318 | perror("[error] Error sending cmd"); |
4a744367 JD |
319 | goto error; |
320 | } | |
321 | assert(ret_len == sizeof(cmd)); | |
322 | ||
b7e8a8e1 | 323 | ret_len = lttng_live_recv(ctx->control_sock, &list, sizeof(list)); |
f8612f31 MD |
324 | if (ret_len == 0) { |
325 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
326 | goto error; |
327 | } | |
4a744367 | 328 | if (ret_len < 0) { |
79620497 | 329 | perror("[error] Error receiving session list"); |
4a744367 JD |
330 | goto error; |
331 | } | |
332 | assert(ret_len == sizeof(list)); | |
333 | ||
334 | sessions_count = be32toh(list.sessions_count); | |
4a744367 | 335 | for (i = 0; i < sessions_count; i++) { |
b7e8a8e1 | 336 | ret_len = lttng_live_recv(ctx->control_sock, &lsession, sizeof(lsession)); |
f8612f31 MD |
337 | if (ret_len == 0) { |
338 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
339 | goto error; |
340 | } | |
4a744367 | 341 | if (ret_len < 0) { |
79620497 | 342 | perror("[error] Error receiving session"); |
4a744367 JD |
343 | goto error; |
344 | } | |
345 | assert(ret_len == sizeof(lsession)); | |
9ed31e53 MD |
346 | lsession.hostname[LTTNG_VIEWER_HOST_NAME_MAX - 1] = '\0'; |
347 | lsession.session_name[LTTNG_VIEWER_NAME_MAX - 1] = '\0'; | |
b5a1fa45 JD |
348 | session_id = be64toh(lsession.id); |
349 | ||
350 | if (print_list) { | |
351 | update_session_list(session_list, | |
352 | lsession.hostname, | |
353 | lsession.session_name, | |
354 | be32toh(lsession.streams), | |
355 | be32toh(lsession.clients), | |
356 | be32toh(lsession.live_timer)); | |
357 | } else { | |
358 | if ((strncmp(lsession.session_name, ctx->session_name, | |
0206bb4a MJ |
359 | MAXNAMLEN) == 0) && (strncmp(lsession.hostname, |
360 | ctx->traced_hostname, MAXNAMLEN) == 0)) { | |
b5a1fa45 JD |
361 | printf_verbose("Reading from session %" PRIu64 "\n", |
362 | session_id); | |
363 | g_array_append_val(ctx->session_ids, | |
364 | session_id); | |
365 | } | |
366 | } | |
367 | } | |
4a744367 | 368 | |
b5a1fa45 JD |
369 | if (print_list) { |
370 | print_session_list(session_list, path); | |
371 | free_session_list(session_list); | |
4a744367 | 372 | } |
4a744367 | 373 | ret = 0; |
8ace20bf MD |
374 | end: |
375 | return ret; | |
4a744367 JD |
376 | |
377 | error: | |
8ace20bf MD |
378 | fprintf(stderr, "[error] Unable to list sessions\n"); |
379 | return -1; | |
4a744367 JD |
380 | } |
381 | ||
382 | int lttng_live_ctf_trace_assign(struct lttng_live_viewer_stream *stream, | |
383 | uint64_t ctf_trace_id) | |
384 | { | |
385 | struct lttng_live_ctf_trace *trace; | |
386 | int ret = 0; | |
387 | ||
388 | trace = g_hash_table_lookup(stream->session->ctf_traces, | |
37307240 | 389 | &ctf_trace_id); |
4a744367 JD |
390 | if (!trace) { |
391 | trace = g_new0(struct lttng_live_ctf_trace, 1); | |
4a744367 JD |
392 | trace->ctf_trace_id = ctf_trace_id; |
393 | trace->streams = g_ptr_array_new(); | |
394 | g_hash_table_insert(stream->session->ctf_traces, | |
37307240 | 395 | &trace->ctf_trace_id, |
4a744367 JD |
396 | trace); |
397 | } | |
398 | if (stream->metadata_flag) | |
399 | trace->metadata_stream = stream; | |
400 | ||
401 | stream->ctf_trace = trace; | |
402 | g_ptr_array_add(trace->streams, stream); | |
403 | ||
4a744367 JD |
404 | return ret; |
405 | } | |
406 | ||
af701dc4 JD |
407 | static |
408 | int open_metadata_fp_write(struct lttng_live_viewer_stream *stream, | |
409 | char **metadata_buf, size_t *size) | |
410 | { | |
411 | int ret = 0; | |
412 | ||
413 | stream->metadata_fp_write = | |
414 | babeltrace_open_memstream(metadata_buf, size); | |
415 | if (!stream->metadata_fp_write) { | |
416 | perror("Metadata open_memstream"); | |
417 | ret = -1; | |
418 | } | |
419 | ||
420 | return ret; | |
421 | } | |
422 | ||
4a744367 JD |
423 | int lttng_live_attach_session(struct lttng_live_ctx *ctx, uint64_t id) |
424 | { | |
425 | struct lttng_viewer_cmd cmd; | |
426 | struct lttng_viewer_attach_session_request rq; | |
427 | struct lttng_viewer_attach_session_response rp; | |
428 | struct lttng_viewer_stream stream; | |
de417d04 JR |
429 | const size_t cmd_buf_len = sizeof(cmd) + sizeof(rq); |
430 | char cmd_buf[cmd_buf_len]; | |
4a744367 JD |
431 | int ret, i; |
432 | ssize_t ret_len; | |
433 | ||
8ace20bf MD |
434 | if (lttng_live_should_quit()) { |
435 | ret = -1; | |
436 | goto end; | |
437 | } | |
438 | ||
4a744367 | 439 | cmd.cmd = htobe32(LTTNG_VIEWER_ATTACH_SESSION); |
259863bd | 440 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); |
e11a3d28 | 441 | cmd.cmd_version = htobe32(0); |
4a744367 JD |
442 | |
443 | memset(&rq, 0, sizeof(rq)); | |
444 | rq.session_id = htobe64(id); | |
445 | // TODO: add cmd line parameter to select seek beginning | |
446 | // rq.seek = htobe32(LTTNG_VIEWER_SEEK_BEGINNING); | |
447 | rq.seek = htobe32(LTTNG_VIEWER_SEEK_LAST); | |
448 | ||
de417d04 JR |
449 | /* |
450 | * Merge the cmd and connection request to prevent a write-write | |
451 | * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the | |
452 | * second write to be performed quickly in presence of Nagle's algorithm. | |
453 | */ | |
454 | memcpy(cmd_buf, &cmd, sizeof(cmd)); | |
455 | memcpy(cmd_buf + sizeof(cmd), &rq, sizeof(rq)); | |
4a744367 | 456 | |
de417d04 | 457 | ret_len = lttng_live_send(ctx->control_sock, cmd_buf, cmd_buf_len); |
4a744367 | 458 | if (ret_len < 0) { |
de417d04 | 459 | perror("[error] Error sending attach command and request"); |
4a744367 JD |
460 | goto error; |
461 | } | |
de417d04 | 462 | assert(ret_len == cmd_buf_len); |
4a744367 | 463 | |
b7e8a8e1 | 464 | ret_len = lttng_live_recv(ctx->control_sock, &rp, sizeof(rp)); |
f8612f31 MD |
465 | if (ret_len == 0) { |
466 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
467 | goto error; |
468 | } | |
4a744367 | 469 | if (ret_len < 0) { |
79620497 | 470 | perror("[error] Error receiving attach response"); |
4a744367 JD |
471 | goto error; |
472 | } | |
473 | assert(ret_len == sizeof(rp)); | |
474 | ||
475 | switch(be32toh(rp.status)) { | |
476 | case LTTNG_VIEWER_ATTACH_OK: | |
477 | break; | |
478 | case LTTNG_VIEWER_ATTACH_UNK: | |
479 | ret = -LTTNG_VIEWER_ATTACH_UNK; | |
480 | goto end; | |
481 | case LTTNG_VIEWER_ATTACH_ALREADY: | |
79620497 | 482 | fprintf(stderr, "[error] There is already a viewer attached to this session\n"); |
8ace20bf | 483 | goto error; |
4a744367 JD |
484 | case LTTNG_VIEWER_ATTACH_NOT_LIVE: |
485 | fprintf(stderr, "[error] Not a live session\n"); | |
8ace20bf | 486 | goto error; |
4a744367 JD |
487 | case LTTNG_VIEWER_ATTACH_SEEK_ERR: |
488 | fprintf(stderr, "[error] Wrong seek parameter\n"); | |
8ace20bf | 489 | goto error; |
4a744367 JD |
490 | default: |
491 | fprintf(stderr, "[error] Unknown attach return code %u\n", | |
492 | be32toh(rp.status)); | |
8ace20bf | 493 | goto error; |
4a744367 JD |
494 | } |
495 | if (be32toh(rp.status) != LTTNG_VIEWER_ATTACH_OK) { | |
8ace20bf | 496 | goto error; |
4a744367 JD |
497 | } |
498 | ||
2acdc547 | 499 | ctx->session->stream_count += be32toh(rp.streams_count); |
4a744367 JD |
500 | /* |
501 | * When the session is created but not started, we do an active wait | |
502 | * until it starts. It allows the viewer to start processing the trace | |
503 | * as soon as the session starts. | |
504 | */ | |
505 | if (ctx->session->stream_count == 0) { | |
506 | ret = 0; | |
507 | goto end; | |
508 | } | |
b5e7994d MD |
509 | printf_verbose("Waiting for %d streams:\n", |
510 | be32toh(rp.streams_count)); | |
4a744367 | 511 | for (i = 0; i < be32toh(rp.streams_count); i++) { |
b5e7994d MD |
512 | struct lttng_live_viewer_stream *lvstream; |
513 | ||
514 | lvstream = g_new0(struct lttng_live_viewer_stream, 1); | |
515 | ret_len = lttng_live_recv(ctx->control_sock, &stream, | |
516 | sizeof(stream)); | |
f8612f31 MD |
517 | if (ret_len == 0) { |
518 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
b5e7994d | 519 | g_free(lvstream); |
f8612f31 MD |
520 | goto error; |
521 | } | |
4a744367 | 522 | if (ret_len < 0) { |
79620497 | 523 | perror("[error] Error receiving stream"); |
b5e7994d | 524 | g_free(lvstream); |
4a744367 JD |
525 | goto error; |
526 | } | |
527 | assert(ret_len == sizeof(stream)); | |
9ed31e53 MD |
528 | stream.path_name[LTTNG_VIEWER_PATH_MAX - 1] = '\0'; |
529 | stream.channel_name[LTTNG_VIEWER_NAME_MAX - 1] = '\0'; | |
4a744367 JD |
530 | |
531 | printf_verbose(" stream %" PRIu64 " : %s/%s\n", | |
532 | be64toh(stream.id), stream.path_name, | |
533 | stream.channel_name); | |
b5e7994d MD |
534 | lvstream->id = be64toh(stream.id); |
535 | lvstream->session = ctx->session; | |
4a744367 | 536 | |
b5e7994d MD |
537 | lvstream->mmap_size = 0; |
538 | lvstream->ctf_stream_id = -1ULL; | |
4a744367 JD |
539 | |
540 | if (be32toh(stream.metadata_flag)) { | |
b5e7994d | 541 | lvstream->metadata_flag = 1; |
4a744367 | 542 | } |
b5e7994d | 543 | ret = lttng_live_ctf_trace_assign(lvstream, |
4a744367 JD |
544 | be64toh(stream.ctf_trace_id)); |
545 | if (ret < 0) { | |
b5e7994d | 546 | g_free(lvstream); |
4a744367 JD |
547 | goto error; |
548 | } | |
b5e7994d MD |
549 | bt_list_add(&lvstream->stream_node, |
550 | &ctx->session->stream_list); | |
4a744367 JD |
551 | } |
552 | ret = 0; | |
4a744367 | 553 | end: |
4a744367 | 554 | return ret; |
8ace20bf MD |
555 | |
556 | error: | |
557 | return -1; | |
4a744367 JD |
558 | } |
559 | ||
73b2b0d1 JD |
560 | /* |
561 | * Ask the relay for new streams. | |
562 | * | |
563 | * Returns the number of new streams received or a negative value on error. | |
564 | */ | |
2acdc547 JD |
565 | static |
566 | int ask_new_streams(struct lttng_live_ctx *ctx) | |
567 | { | |
73b2b0d1 | 568 | int i, ret = 0, nb_streams = 0; |
2acdc547 JD |
569 | uint64_t id; |
570 | ||
571 | restart: | |
572 | for (i = 0; i < ctx->session_ids->len; i++) { | |
573 | id = g_array_index(ctx->session_ids, uint64_t, i); | |
574 | ret = lttng_live_get_new_streams(ctx, id); | |
73b2b0d1 | 575 | printf_verbose("Asking for new streams returns %d\n", ret); |
09aa42aa MD |
576 | if (lttng_live_should_quit()) { |
577 | ret = -1; | |
578 | goto end; | |
579 | } | |
2acdc547 JD |
580 | if (ret < 0) { |
581 | if (ret == -LTTNG_VIEWER_NEW_STREAMS_HUP) { | |
582 | printf_verbose("Session %" PRIu64 " closed\n", | |
583 | id); | |
b5a1fa45 JD |
584 | /* |
585 | * The streams have already been closed during | |
586 | * the reading, so we only need to get rid of | |
587 | * the trace in our internal table of sessions. | |
588 | */ | |
2acdc547 JD |
589 | g_array_remove_index(ctx->session_ids, i); |
590 | /* | |
591 | * We can't continue iterating on the g_array | |
592 | * after a remove, we have to start again. | |
593 | */ | |
594 | goto restart; | |
595 | } else { | |
596 | ret = -1; | |
597 | goto end; | |
598 | } | |
73b2b0d1 JD |
599 | } else { |
600 | nb_streams += ret; | |
2acdc547 JD |
601 | } |
602 | } | |
2600cf83 MD |
603 | if (ctx->session_ids->len == 0) { |
604 | /* All sessions are closed. */ | |
605 | ret = -1; | |
606 | } else { | |
607 | ret = nb_streams; | |
608 | } | |
2acdc547 JD |
609 | |
610 | end: | |
611 | return ret; | |
612 | } | |
613 | ||
50d207af JD |
614 | static |
615 | int append_metadata(struct lttng_live_ctx *ctx, | |
616 | struct lttng_live_viewer_stream *viewer_stream) | |
617 | { | |
618 | int ret; | |
619 | struct lttng_live_viewer_stream *metadata; | |
620 | char *metadata_buf = NULL; | |
621 | ||
4d174373 MD |
622 | if (!viewer_stream->ctf_trace->handle) { |
623 | printf_verbose("append_metadata: trace handle not ready yet.\n"); | |
624 | return 0; | |
625 | } | |
626 | ||
50d207af JD |
627 | printf_verbose("get_next_index: new metadata needed\n"); |
628 | ret = get_new_metadata(ctx, viewer_stream, &metadata_buf); | |
629 | if (ret < 0) { | |
630 | free(metadata_buf); | |
631 | goto error; | |
632 | } | |
633 | ||
634 | metadata = viewer_stream->ctf_trace->metadata_stream; | |
635 | metadata->ctf_trace->metadata_fp = | |
636 | babeltrace_fmemopen(metadata_buf, | |
637 | metadata->metadata_len, "rb"); | |
638 | if (!metadata->ctf_trace->metadata_fp) { | |
639 | perror("Metadata fmemopen"); | |
640 | free(metadata_buf); | |
641 | ret = -1; | |
642 | goto error; | |
643 | } | |
644 | ret = ctf_append_trace_metadata( | |
645 | viewer_stream->ctf_trace->handle->td, | |
646 | metadata->ctf_trace->metadata_fp); | |
251fc08c MD |
647 | /* We accept empty metadata packets */ |
648 | if (ret != 0 && ret != -ENOENT) { | |
50d207af JD |
649 | fprintf(stderr, "[error] Appending metadata\n"); |
650 | goto error; | |
651 | } | |
251fc08c | 652 | ret = 0; |
50d207af JD |
653 | |
654 | error: | |
655 | return ret; | |
656 | } | |
657 | ||
4a744367 JD |
658 | static |
659 | int get_data_packet(struct lttng_live_ctx *ctx, | |
660 | struct ctf_stream_pos *pos, | |
661 | struct lttng_live_viewer_stream *stream, uint64_t offset, | |
662 | uint64_t len) | |
663 | { | |
664 | struct lttng_viewer_cmd cmd; | |
665 | struct lttng_viewer_get_packet rq; | |
666 | struct lttng_viewer_trace_packet rp; | |
de417d04 JR |
667 | const size_t cmd_buf_len = sizeof(cmd) + sizeof(rq); |
668 | char cmd_buf[cmd_buf_len]; | |
4a744367 JD |
669 | ssize_t ret_len; |
670 | int ret; | |
671 | ||
50d207af | 672 | retry: |
8ace20bf MD |
673 | if (lttng_live_should_quit()) { |
674 | ret = -1; | |
675 | goto end; | |
676 | } | |
857eaa68 | 677 | |
4a744367 | 678 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_PACKET); |
259863bd | 679 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); |
e11a3d28 | 680 | cmd.cmd_version = htobe32(0); |
4a744367 JD |
681 | |
682 | memset(&rq, 0, sizeof(rq)); | |
683 | rq.stream_id = htobe64(stream->id); | |
c1e8ac81 | 684 | rq.offset = htobe64(offset); |
4a744367 JD |
685 | rq.len = htobe32(len); |
686 | ||
de417d04 JR |
687 | /* |
688 | * Merge the cmd and connection request to prevent a write-write | |
689 | * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the | |
690 | * second write to be performed quickly in presence of Nagle's algorithm. | |
691 | */ | |
692 | memcpy(cmd_buf, &cmd, sizeof(cmd)); | |
693 | memcpy(cmd_buf + sizeof(cmd), &rq, sizeof(rq)); | |
4a744367 | 694 | |
de417d04 | 695 | ret_len = lttng_live_send(ctx->control_sock, cmd_buf, cmd_buf_len); |
4a744367 | 696 | if (ret_len < 0) { |
de417d04 | 697 | perror("[error] Error sending get_data_packet cmd and request"); |
4a744367 JD |
698 | goto error; |
699 | } | |
de417d04 | 700 | assert(ret_len == cmd_buf_len); |
4a744367 | 701 | |
b7e8a8e1 | 702 | ret_len = lttng_live_recv(ctx->control_sock, &rp, sizeof(rp)); |
f8612f31 MD |
703 | if (ret_len == 0) { |
704 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
705 | goto error; |
706 | } | |
4a744367 | 707 | if (ret_len < 0) { |
79620497 | 708 | perror("[error] Error receiving data response"); |
4a744367 JD |
709 | goto error; |
710 | } | |
57b9d843 | 711 | if (ret_len != sizeof(rp)) { |
7e5e4176 MD |
712 | fprintf(stderr, "[error] get_data_packet: expected %zu" |
713 | ", received %zd\n", sizeof(rp), | |
a5e4b11e | 714 | ret_len); |
57b9d843 JD |
715 | goto error; |
716 | } | |
4a744367 JD |
717 | |
718 | rp.flags = be32toh(rp.flags); | |
719 | ||
720 | switch (be32toh(rp.status)) { | |
721 | case LTTNG_VIEWER_GET_PACKET_OK: | |
722 | len = be32toh(rp.len); | |
723 | printf_verbose("get_data_packet: Ok, packet size : %" PRIu64 | |
724 | "\n", len); | |
725 | break; | |
726 | case LTTNG_VIEWER_GET_PACKET_RETRY: | |
8ace20bf | 727 | /* Unimplemented by relay daemon */ |
4a744367 | 728 | printf_verbose("get_data_packet: retry\n"); |
8ace20bf | 729 | goto error; |
4a744367 JD |
730 | case LTTNG_VIEWER_GET_PACKET_ERR: |
731 | if (rp.flags & LTTNG_VIEWER_FLAG_NEW_METADATA) { | |
732 | printf_verbose("get_data_packet: new metadata needed\n"); | |
50d207af JD |
733 | ret = append_metadata(ctx, stream); |
734 | if (ret) | |
735 | goto error; | |
4a744367 | 736 | } |
2acdc547 | 737 | if (rp.flags & LTTNG_VIEWER_FLAG_NEW_STREAM) { |
f312b3aa | 738 | printf_verbose("get_data_packet: new streams needed\n"); |
2acdc547 | 739 | ret = ask_new_streams(ctx); |
7840bb08 | 740 | if (ret < 0) { |
2acdc547 | 741 | goto error; |
7840bb08 JD |
742 | } else if (ret > 0) { |
743 | ret = add_traces(ctx); | |
744 | if (ret < 0) { | |
745 | goto error; | |
746 | } | |
747 | } | |
2acdc547 | 748 | } |
f312b3aa MD |
749 | if (rp.flags & (LTTNG_VIEWER_FLAG_NEW_METADATA |
750 | | LTTNG_VIEWER_FLAG_NEW_STREAM)) { | |
751 | goto retry; | |
752 | } | |
4a744367 | 753 | fprintf(stderr, "[error] get_data_packet: error\n"); |
8ace20bf | 754 | goto error; |
4a744367 JD |
755 | case LTTNG_VIEWER_GET_PACKET_EOF: |
756 | ret = -2; | |
8ace20bf | 757 | goto end; |
4a744367 JD |
758 | default: |
759 | printf_verbose("get_data_packet: unknown\n"); | |
8ace20bf | 760 | goto error; |
4a744367 JD |
761 | } |
762 | ||
65ae9a82 | 763 | if (len == 0) { |
96943040 | 764 | goto error; |
4a744367 JD |
765 | } |
766 | ||
767 | if (len > stream->mmap_size) { | |
768 | uint64_t new_size; | |
769 | ||
770 | new_size = max_t(uint64_t, len, stream->mmap_size << 1); | |
771 | if (pos->base_mma) { | |
772 | /* unmap old base */ | |
773 | ret = munmap_align(pos->base_mma); | |
774 | if (ret) { | |
79620497 | 775 | perror("[error] Unable to unmap old base"); |
4a744367 JD |
776 | goto error; |
777 | } | |
778 | pos->base_mma = NULL; | |
779 | } | |
780 | pos->base_mma = mmap_align(new_size, | |
781 | PROT_READ | PROT_WRITE, | |
782 | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); | |
783 | if (pos->base_mma == MAP_FAILED) { | |
79620497 | 784 | perror("[error] mmap error"); |
4a744367 | 785 | pos->base_mma = NULL; |
4a744367 JD |
786 | goto error; |
787 | } | |
788 | ||
789 | stream->mmap_size = new_size; | |
790 | printf_verbose("Expanding stream mmap size to %" PRIu64 " bytes\n", | |
791 | stream->mmap_size); | |
792 | } | |
793 | ||
b7e8a8e1 MD |
794 | ret_len = lttng_live_recv(ctx->control_sock, |
795 | mmap_align_addr(pos->base_mma), len); | |
f8612f31 MD |
796 | if (ret_len == 0) { |
797 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
798 | goto error; |
799 | } | |
4a744367 | 800 | if (ret_len < 0) { |
79620497 | 801 | perror("[error] Error receiving trace packet"); |
4a744367 JD |
802 | goto error; |
803 | } | |
804 | assert(ret_len == len); | |
f312b3aa | 805 | ret = 0; |
4a744367 | 806 | end: |
4a744367 | 807 | return ret; |
8ace20bf MD |
808 | |
809 | error: | |
810 | return -1; | |
4a744367 JD |
811 | } |
812 | ||
4a744367 | 813 | static |
9abca178 JD |
814 | int get_one_metadata_packet(struct lttng_live_ctx *ctx, |
815 | struct lttng_live_viewer_stream *metadata_stream) | |
4a744367 JD |
816 | { |
817 | uint64_t len = 0; | |
818 | int ret; | |
819 | struct lttng_viewer_cmd cmd; | |
820 | struct lttng_viewer_get_metadata rq; | |
821 | struct lttng_viewer_metadata_packet rp; | |
4a744367 JD |
822 | char *data = NULL; |
823 | ssize_t ret_len; | |
de417d04 JR |
824 | const size_t cmd_buf_len = sizeof(cmd) + sizeof(rq); |
825 | char cmd_buf[cmd_buf_len]; | |
4a744367 | 826 | |
8ace20bf MD |
827 | if (lttng_live_should_quit()) { |
828 | ret = -1; | |
829 | goto end; | |
830 | } | |
831 | ||
9abca178 | 832 | rq.stream_id = htobe64(metadata_stream->id); |
4a744367 | 833 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_METADATA); |
259863bd | 834 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); |
e11a3d28 | 835 | cmd.cmd_version = htobe32(0); |
4a744367 | 836 | |
de417d04 JR |
837 | /* |
838 | * Merge the cmd and connection request to prevent a write-write | |
839 | * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the | |
840 | * second write to be performed quickly in presence of Nagle's algorithm. | |
841 | */ | |
842 | memcpy(cmd_buf, &cmd, sizeof(cmd)); | |
843 | memcpy(cmd_buf + sizeof(cmd), &rq, sizeof(rq)); | |
4a744367 | 844 | |
de417d04 | 845 | ret_len = lttng_live_send(ctx->control_sock, cmd_buf, cmd_buf_len); |
4a744367 | 846 | if (ret_len < 0) { |
de417d04 | 847 | perror("[error] Error sending get_metadata cmd and request"); |
4a744367 JD |
848 | goto error; |
849 | } | |
de417d04 | 850 | assert(ret_len == cmd_buf_len); |
4a744367 | 851 | |
b7e8a8e1 | 852 | ret_len = lttng_live_recv(ctx->control_sock, &rp, sizeof(rp)); |
f8612f31 MD |
853 | if (ret_len == 0) { |
854 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
855 | goto error; |
856 | } | |
4a744367 | 857 | if (ret_len < 0) { |
79620497 | 858 | perror("[error] Error receiving metadata response"); |
4a744367 JD |
859 | goto error; |
860 | } | |
861 | assert(ret_len == sizeof(rp)); | |
862 | ||
863 | switch (be32toh(rp.status)) { | |
864 | case LTTNG_VIEWER_METADATA_OK: | |
865 | printf_verbose("get_metadata : OK\n"); | |
866 | break; | |
867 | case LTTNG_VIEWER_NO_NEW_METADATA: | |
868 | printf_verbose("get_metadata : NO NEW\n"); | |
9abca178 | 869 | ret = 0; |
4a744367 JD |
870 | goto end; |
871 | case LTTNG_VIEWER_METADATA_ERR: | |
872 | printf_verbose("get_metadata : ERR\n"); | |
8ace20bf | 873 | goto error; |
4a744367 JD |
874 | default: |
875 | printf_verbose("get_metadata : UNKNOWN\n"); | |
8ace20bf | 876 | goto error; |
4a744367 JD |
877 | } |
878 | ||
879 | len = be64toh(rp.len); | |
880 | printf_verbose("Writing %" PRIu64" bytes to metadata\n", len); | |
881 | if (len <= 0) { | |
8ace20bf | 882 | goto error; |
4a744367 JD |
883 | } |
884 | ||
885 | data = zmalloc(len); | |
886 | if (!data) { | |
887 | perror("relay data zmalloc"); | |
4a744367 JD |
888 | goto error; |
889 | } | |
b7e8a8e1 | 890 | ret_len = lttng_live_recv(ctx->control_sock, data, len); |
f8612f31 MD |
891 | if (ret_len == 0) { |
892 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
8ace20bf | 893 | goto error_free_data; |
f8612f31 | 894 | } |
4a744367 | 895 | if (ret_len < 0) { |
79620497 | 896 | perror("[error] Error receiving trace packet"); |
8ace20bf | 897 | goto error_free_data; |
4a744367 JD |
898 | } |
899 | assert(ret_len == len); | |
900 | ||
901 | do { | |
af701dc4 JD |
902 | ret_len = fwrite(data, 1, len, |
903 | metadata_stream->metadata_fp_write); | |
4a744367 JD |
904 | } while (ret_len < 0 && errno == EINTR); |
905 | if (ret_len < 0) { | |
af701dc4 | 906 | fprintf(stderr, "[error] Writing in the metadata fp\n"); |
8ace20bf | 907 | goto error_free_data; |
4a744367 JD |
908 | } |
909 | assert(ret_len == len); | |
af701dc4 | 910 | metadata_stream->metadata_len += len; |
8ace20bf | 911 | free(data); |
9abca178 | 912 | ret = len; |
8ace20bf MD |
913 | end: |
914 | return ret; | |
4a744367 | 915 | |
8ace20bf | 916 | error_free_data: |
4a744367 | 917 | free(data); |
4a744367 | 918 | error: |
8ace20bf | 919 | return -1; |
4a744367 JD |
920 | } |
921 | ||
9abca178 JD |
922 | /* |
923 | * Return 0 on success, a negative value on error. | |
924 | */ | |
925 | static | |
926 | int get_new_metadata(struct lttng_live_ctx *ctx, | |
af701dc4 JD |
927 | struct lttng_live_viewer_stream *viewer_stream, |
928 | char **metadata_buf) | |
9abca178 JD |
929 | { |
930 | int ret = 0; | |
931 | struct lttng_live_viewer_stream *metadata_stream; | |
73b2b0d1 | 932 | size_t size, len_read = 0; |
9abca178 JD |
933 | |
934 | metadata_stream = viewer_stream->ctf_trace->metadata_stream; | |
50d207af JD |
935 | if (!metadata_stream) { |
936 | fprintf(stderr, "[error] No metadata stream\n"); | |
937 | ret = -1; | |
938 | goto error; | |
939 | } | |
af701dc4 JD |
940 | metadata_stream->metadata_len = 0; |
941 | ret = open_metadata_fp_write(metadata_stream, metadata_buf, &size); | |
942 | if (ret < 0) { | |
943 | goto error; | |
944 | } | |
9abca178 JD |
945 | |
946 | do { | |
d1694e41 JD |
947 | if (lttng_live_should_quit()) { |
948 | ret = -1; | |
949 | goto error; | |
950 | } | |
9abca178 JD |
951 | /* |
952 | * get_one_metadata_packet returns the number of bytes | |
953 | * received, 0 when we have received everything, a | |
954 | * negative value on error. | |
955 | */ | |
956 | ret = get_one_metadata_packet(ctx, metadata_stream); | |
c111d5d7 MD |
957 | if (ret > 0) { |
958 | len_read += ret; | |
959 | } | |
85e2085e MD |
960 | if (!len_read) { |
961 | (void) poll(NULL, 0, ACTIVE_POLL_DELAY); | |
962 | } | |
27da2781 MD |
963 | if (ret < 0) { |
964 | break; /* Stop on error. */ | |
965 | } | |
c111d5d7 | 966 | } while (ret > 0 || !len_read); |
9abca178 | 967 | |
91bb0024 MD |
968 | if (babeltrace_close_memstream(metadata_buf, &size, |
969 | metadata_stream->metadata_fp_write)) { | |
970 | perror("babeltrace_close_memstream"); | |
971 | } | |
af701dc4 JD |
972 | metadata_stream->metadata_fp_write = NULL; |
973 | ||
974 | error: | |
9abca178 JD |
975 | return ret; |
976 | } | |
977 | ||
fb6b45aa JD |
978 | /* |
979 | * Assign the fields from a lttng_viewer_index to a packet_index. | |
980 | */ | |
981 | static | |
982 | void lttng_index_to_packet_index(struct lttng_viewer_index *lindex, | |
983 | struct packet_index *pindex) | |
984 | { | |
985 | assert(lindex); | |
986 | assert(pindex); | |
987 | ||
988 | pindex->offset = be64toh(lindex->offset); | |
989 | pindex->packet_size = be64toh(lindex->packet_size); | |
990 | pindex->content_size = be64toh(lindex->content_size); | |
991 | pindex->ts_cycles.timestamp_begin = be64toh(lindex->timestamp_begin); | |
992 | pindex->ts_cycles.timestamp_end = be64toh(lindex->timestamp_end); | |
993 | pindex->events_discarded = be64toh(lindex->events_discarded); | |
994 | } | |
995 | ||
4a744367 JD |
996 | /* |
997 | * Get one index for a stream. | |
998 | * | |
999 | * Returns 0 on success or a negative value on error. | |
1000 | */ | |
1001 | static | |
1002 | int get_next_index(struct lttng_live_ctx *ctx, | |
1003 | struct lttng_live_viewer_stream *viewer_stream, | |
fb6b45aa | 1004 | struct packet_index *index, uint64_t *stream_id) |
4a744367 JD |
1005 | { |
1006 | struct lttng_viewer_cmd cmd; | |
1007 | struct lttng_viewer_get_next_index rq; | |
4a744367 | 1008 | int ret; |
4a744367 | 1009 | ssize_t ret_len; |
fb6b45aa | 1010 | struct lttng_viewer_index *rp = &viewer_stream->current_index; |
de417d04 JR |
1011 | const size_t cmd_buf_len = sizeof(cmd) + sizeof(rq); |
1012 | char cmd_buf[cmd_buf_len]; | |
4a744367 JD |
1013 | |
1014 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_NEXT_INDEX); | |
259863bd | 1015 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); |
e11a3d28 | 1016 | cmd.cmd_version = htobe32(0); |
4a744367 JD |
1017 | |
1018 | memset(&rq, 0, sizeof(rq)); | |
1019 | rq.stream_id = htobe64(viewer_stream->id); | |
1020 | ||
de417d04 JR |
1021 | /* |
1022 | * Merge the cmd and connection request to prevent a write-write | |
1023 | * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the | |
1024 | * second write to be performed quickly in presence of Nagle's algorithm. | |
1025 | */ | |
1026 | memcpy(cmd_buf, &cmd, sizeof(cmd)); | |
1027 | memcpy(cmd_buf + sizeof(cmd), &rq, sizeof(rq)); | |
4a744367 | 1028 | retry: |
8ace20bf MD |
1029 | if (lttng_live_should_quit()) { |
1030 | ret = -1; | |
1031 | goto end; | |
1032 | } | |
de417d04 | 1033 | ret_len = lttng_live_send(ctx->control_sock, &cmd_buf, cmd_buf_len); |
4a744367 | 1034 | if (ret_len < 0) { |
de417d04 | 1035 | perror("[error] Error sending get_next_index cmd and request"); |
4a744367 JD |
1036 | goto error; |
1037 | } | |
de417d04 | 1038 | assert(ret_len == cmd_buf_len); |
4a744367 | 1039 | |
fb6b45aa | 1040 | ret_len = lttng_live_recv(ctx->control_sock, rp, sizeof(*rp)); |
f8612f31 MD |
1041 | if (ret_len == 0) { |
1042 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
1043 | goto error; |
1044 | } | |
4a744367 | 1045 | if (ret_len < 0) { |
79620497 | 1046 | perror("[error] Error receiving index response"); |
4a744367 JD |
1047 | goto error; |
1048 | } | |
fb6b45aa | 1049 | assert(ret_len == sizeof(*rp)); |
4a744367 | 1050 | |
fb6b45aa | 1051 | rp->flags = be32toh(rp->flags); |
4a744367 | 1052 | |
fb6b45aa | 1053 | switch (be32toh(rp->status)) { |
4a744367 JD |
1054 | case LTTNG_VIEWER_INDEX_INACTIVE: |
1055 | printf_verbose("get_next_index: inactive\n"); | |
4594dbd8 JR |
1056 | |
1057 | if (index->ts_cycles.timestamp_end == | |
1058 | be64toh(rp->timestamp_end)) { | |
1059 | /* Already seen this timestamp. */ | |
1060 | (void) poll(NULL, 0, ACTIVE_POLL_DELAY); | |
1061 | } | |
1062 | ||
4a744367 | 1063 | memset(index, 0, sizeof(struct packet_index)); |
fb6b45aa JD |
1064 | index->ts_cycles.timestamp_end = be64toh(rp->timestamp_end); |
1065 | *stream_id = be64toh(rp->stream_id); | |
4a744367 JD |
1066 | break; |
1067 | case LTTNG_VIEWER_INDEX_OK: | |
1068 | printf_verbose("get_next_index: Ok, need metadata update : %u\n", | |
fb6b45aa JD |
1069 | rp->flags & LTTNG_VIEWER_FLAG_NEW_METADATA); |
1070 | lttng_index_to_packet_index(rp, index); | |
1071 | *stream_id = be64toh(rp->stream_id); | |
1072 | viewer_stream->data_pending = 1; | |
4a744367 | 1073 | |
fb6b45aa | 1074 | if (rp->flags & LTTNG_VIEWER_FLAG_NEW_METADATA) { |
50d207af JD |
1075 | ret = append_metadata(ctx, viewer_stream); |
1076 | if (ret) | |
4a744367 | 1077 | goto error; |
4a744367 | 1078 | } |
fb6b45aa | 1079 | if (rp->flags & LTTNG_VIEWER_FLAG_NEW_STREAM) { |
73b2b0d1 | 1080 | printf_verbose("get_next_index: need new streams\n"); |
2acdc547 | 1081 | ret = ask_new_streams(ctx); |
7840bb08 | 1082 | if (ret < 0) { |
2acdc547 | 1083 | goto error; |
7840bb08 JD |
1084 | } else if (ret > 0) { |
1085 | ret = add_traces(ctx); | |
1086 | if (ret < 0) { | |
1087 | goto error; | |
1088 | } | |
1089 | } | |
2acdc547 | 1090 | } |
4a744367 JD |
1091 | break; |
1092 | case LTTNG_VIEWER_INDEX_RETRY: | |
1093 | printf_verbose("get_next_index: retry\n"); | |
85e2085e | 1094 | (void) poll(NULL, 0, ACTIVE_POLL_DELAY); |
4a744367 JD |
1095 | goto retry; |
1096 | case LTTNG_VIEWER_INDEX_HUP: | |
1097 | printf_verbose("get_next_index: stream hung up\n"); | |
b5e7994d | 1098 | /* TODO: remove stream from session list and trace ptr array */ |
4a744367 | 1099 | viewer_stream->id = -1ULL; |
4a744367 | 1100 | index->offset = EOF; |
2acdc547 | 1101 | ctx->session->stream_count--; |
4a744367 JD |
1102 | break; |
1103 | case LTTNG_VIEWER_INDEX_ERR: | |
1104 | fprintf(stderr, "[error] get_next_index: error\n"); | |
4a744367 JD |
1105 | goto error; |
1106 | default: | |
1107 | fprintf(stderr, "[error] get_next_index: unkwown value\n"); | |
4a744367 JD |
1108 | goto error; |
1109 | } | |
4a744367 | 1110 | ret = 0; |
8ace20bf MD |
1111 | end: |
1112 | return ret; | |
4a744367 JD |
1113 | |
1114 | error: | |
8ace20bf | 1115 | return -1; |
4a744367 JD |
1116 | } |
1117 | ||
fb6b45aa JD |
1118 | static |
1119 | void read_packet_header(struct ctf_stream_pos *pos, | |
1120 | struct ctf_file_stream *file_stream) | |
1121 | { | |
1122 | int ret; | |
1123 | ||
1124 | /* update trace_packet_header and stream_packet_context */ | |
fcf10417 JG |
1125 | if (!(pos->prot & PROT_WRITE) && |
1126 | file_stream->parent.trace_packet_header) { | |
fb6b45aa JD |
1127 | /* Read packet header */ |
1128 | ret = generic_rw(&pos->parent, | |
1129 | &file_stream->parent.trace_packet_header->p); | |
1130 | if (ret) { | |
1131 | pos->offset = EOF; | |
1132 | fprintf(stderr, "[error] trace packet " | |
1133 | "header read failed\n"); | |
1134 | goto end; | |
1135 | } | |
1136 | } | |
fcf10417 JG |
1137 | if (!(pos->prot & PROT_WRITE) && |
1138 | file_stream->parent.stream_packet_context) { | |
fb6b45aa JD |
1139 | /* Read packet context */ |
1140 | ret = generic_rw(&pos->parent, | |
1141 | &file_stream->parent.stream_packet_context->p); | |
1142 | if (ret) { | |
1143 | pos->offset = EOF; | |
1144 | fprintf(stderr, "[error] stream packet " | |
1145 | "context read failed\n"); | |
1146 | goto end; | |
1147 | } | |
1148 | } | |
1149 | pos->data_offset = pos->offset; | |
1150 | ||
1151 | end: | |
1152 | return; | |
1153 | } | |
1154 | ||
1155 | /* | |
1156 | * Handle the seek parameters. | |
1157 | * Returns 0 if the packet_seek can continue, a positive value to | |
1158 | * cleanly exit the packet_seek, a negative value on error. | |
1159 | */ | |
1160 | static | |
1161 | int handle_seek_position(size_t index, int whence, | |
1162 | struct lttng_live_viewer_stream *viewer_stream, | |
1163 | struct ctf_stream_pos *pos, | |
1164 | struct ctf_file_stream *file_stream) | |
1165 | { | |
6a724a1e | 1166 | int ret = 0; |
fb6b45aa JD |
1167 | |
1168 | switch (whence) { | |
1169 | case SEEK_CUR: | |
1170 | ret = 0; | |
1171 | goto end; | |
1172 | case SEEK_SET: | |
1173 | /* | |
1174 | * We only allow to seek to 0. | |
1175 | */ | |
1176 | if (index != 0) { | |
1177 | fprintf(stderr, "[error] Arbitrary seek in lttng-live " | |
1178 | "trace not supported\n"); | |
1179 | pos->offset = EOF; | |
1180 | ret = -1; | |
1181 | goto end; | |
1182 | } | |
1183 | ||
1184 | ret = 0; | |
1185 | goto end; | |
1186 | ||
1187 | default: | |
1188 | fprintf(stderr, "[error] Invalid seek parameter\n"); | |
1189 | assert(0); | |
1190 | } | |
1191 | ||
1192 | end: | |
1193 | return ret; | |
1194 | } | |
1195 | ||
b5a1fa45 | 1196 | static |
4a744367 JD |
1197 | void ctf_live_packet_seek(struct bt_stream_pos *stream_pos, size_t index, |
1198 | int whence) | |
1199 | { | |
1200 | struct ctf_stream_pos *pos; | |
1201 | struct ctf_file_stream *file_stream; | |
f1f52630 | 1202 | struct packet_index *prev_index = NULL, *cur_index; |
4a744367 JD |
1203 | struct lttng_live_viewer_stream *viewer_stream; |
1204 | struct lttng_live_session *session; | |
fb6b45aa | 1205 | uint64_t stream_id = -1ULL; |
4a744367 JD |
1206 | int ret; |
1207 | ||
4a744367 JD |
1208 | pos = ctf_pos(stream_pos); |
1209 | file_stream = container_of(pos, struct ctf_file_stream, pos); | |
1210 | viewer_stream = (struct lttng_live_viewer_stream *) pos->priv; | |
1211 | session = viewer_stream->session; | |
1212 | ||
fb6b45aa JD |
1213 | ret = handle_seek_position(index, whence, viewer_stream, pos, |
1214 | file_stream); | |
1215 | if (ret != 0) { | |
1216 | return; | |
1217 | } | |
1218 | ||
1219 | retry: | |
f1f52630 MD |
1220 | switch (pos->packet_index->len) { |
1221 | case 0: | |
1222 | g_array_set_size(pos->packet_index, 1); | |
1223 | cur_index = &g_array_index(pos->packet_index, | |
1224 | struct packet_index, 0); | |
1225 | break; | |
1226 | case 1: | |
1227 | g_array_set_size(pos->packet_index, 2); | |
1228 | prev_index = &g_array_index(pos->packet_index, | |
1229 | struct packet_index, 0); | |
1230 | cur_index = &g_array_index(pos->packet_index, | |
1231 | struct packet_index, 1); | |
1232 | break; | |
1233 | case 2: | |
1234 | g_array_index(pos->packet_index, | |
1235 | struct packet_index, 0) = | |
1236 | g_array_index(pos->packet_index, | |
1237 | struct packet_index, 1); | |
1238 | prev_index = &g_array_index(pos->packet_index, | |
1239 | struct packet_index, 0); | |
1240 | cur_index = &g_array_index(pos->packet_index, | |
1241 | struct packet_index, 1); | |
1242 | break; | |
1243 | default: | |
1244 | abort(); | |
1245 | break; | |
1246 | } | |
fb6b45aa JD |
1247 | |
1248 | if (viewer_stream->data_pending) { | |
1249 | lttng_index_to_packet_index(&viewer_stream->current_index, cur_index); | |
1250 | } else { | |
1251 | printf_verbose("get_next_index for stream %" PRIu64 "\n", viewer_stream->id); | |
1252 | ret = get_next_index(session->ctx, viewer_stream, cur_index, &stream_id); | |
1253 | if (ret < 0) { | |
1254 | pos->offset = EOF; | |
1255 | if (!lttng_live_should_quit()) { | |
1256 | fprintf(stderr, "[error] get_next_index failed\n"); | |
1257 | } | |
1258 | return; | |
e29395a8 | 1259 | } |
fb6b45aa JD |
1260 | printf_verbose("Index received : packet_size : %" PRIu64 |
1261 | ", offset %" PRIu64 ", content_size %" PRIu64 | |
1262 | ", timestamp_end : %" PRIu64 "\n", | |
1263 | cur_index->packet_size, cur_index->offset, | |
1264 | cur_index->content_size, | |
1265 | cur_index->ts_cycles.timestamp_end); | |
1266 | ||
1267 | } | |
1268 | ||
1269 | /* | |
1270 | * On the first time we receive an index, the stream_id needs to | |
1271 | * be set for the stream in order to use it, we don't want any | |
1272 | * data at this stage. | |
1273 | */ | |
1274 | if (file_stream->parent.stream_id == -1ULL) { | |
1275 | /* | |
1276 | * Warning: with lttng-tools < 2.4.2, the beacon does not | |
1277 | * contain the real stream ID, it is memset to 0, so this | |
1278 | * might create a problem when a session has multiple | |
1279 | * channels. We can't detect it at this stage, lttng-tools | |
1280 | * has to be upgraded to fix this problem. | |
1281 | */ | |
1282 | printf_verbose("Assigning stream_id %" PRIu64 "\n", | |
1283 | stream_id); | |
1284 | file_stream->parent.stream_id = stream_id; | |
1285 | viewer_stream->ctf_stream_id = stream_id; | |
1286 | ||
4a744367 JD |
1287 | return; |
1288 | } | |
1289 | ||
f1f52630 MD |
1290 | pos->packet_size = cur_index->packet_size; |
1291 | pos->content_size = cur_index->content_size; | |
4a744367 | 1292 | pos->mmap_base_offset = 0; |
f1f52630 | 1293 | if (cur_index->offset == EOF) { |
4a744367 JD |
1294 | pos->offset = EOF; |
1295 | } else { | |
1296 | pos->offset = 0; | |
1297 | } | |
1298 | ||
f1f52630 | 1299 | if (cur_index->content_size == 0) { |
680ea180 | 1300 | /* Beacon packet index */ |
fb6b45aa JD |
1301 | if (file_stream->parent.stream_class) { |
1302 | file_stream->parent.cycles_timestamp = | |
f1f52630 | 1303 | cur_index->ts_cycles.timestamp_end; |
fb6b45aa JD |
1304 | file_stream->parent.real_timestamp = ctf_get_real_timestamp( |
1305 | &file_stream->parent, | |
1306 | cur_index->ts_cycles.timestamp_end); | |
680ea180 JD |
1307 | |
1308 | /* | |
1309 | * Duplicate the data from the previous index, because | |
1310 | * the one we just received is only a beacon with no | |
1311 | * relevant information except the timestamp_end. We | |
1312 | * don't need to keep this timestamp_end because we already | |
1313 | * updated the file_stream timestamps, so we only need | |
1314 | * to keep the last real index data as prev_index. That | |
1315 | * way, we keep the original prev timestamps and | |
1316 | * discarded events counter. This is the same behaviour | |
1317 | * as if we were reading a local trace, we would not | |
1318 | * have fake indexes between real indexes. | |
1319 | */ | |
1320 | memcpy(cur_index, prev_index, sizeof(struct packet_index)); | |
fb6b45aa | 1321 | } |
4a744367 | 1322 | } else { |
680ea180 | 1323 | /* Real packet index */ |
fb6b45aa JD |
1324 | if (file_stream->parent.stream_class) { |
1325 | /* Convert the timestamps and append to the real_index. */ | |
1326 | cur_index->ts_real.timestamp_begin = ctf_get_real_timestamp( | |
1327 | &file_stream->parent, | |
1328 | cur_index->ts_cycles.timestamp_begin); | |
1329 | cur_index->ts_real.timestamp_end = ctf_get_real_timestamp( | |
1330 | &file_stream->parent, | |
1331 | cur_index->ts_cycles.timestamp_end); | |
1332 | } | |
f1f52630 MD |
1333 | |
1334 | ctf_update_current_packet_index(&file_stream->parent, | |
1335 | prev_index, cur_index); | |
1336 | ||
ed093d0e MD |
1337 | /* |
1338 | * We need to check if we are in trace read or called | |
1339 | * from packet indexing. In this last case, the | |
1340 | * collection is not there, so we cannot print the | |
1341 | * timestamps. | |
1342 | */ | |
1343 | if ((&file_stream->parent)->stream_class->trace->parent.collection) { | |
1344 | ctf_print_discarded_lost(stderr, &file_stream->parent); | |
1345 | } | |
1346 | ||
f1f52630 MD |
1347 | file_stream->parent.cycles_timestamp = |
1348 | cur_index->ts_cycles.timestamp_begin; | |
1349 | file_stream->parent.real_timestamp = | |
1350 | cur_index->ts_real.timestamp_begin; | |
4a744367 JD |
1351 | } |
1352 | ||
2a4ae771 JG |
1353 | /* |
1354 | * Flush the output between attempts to grab a packet, thus | |
1355 | * ensuring we flush at least at the periodical timer period. | |
1356 | * This ensures the output remains reactive for interactive users and | |
1357 | * that the output is flushed when redirected to a file by the shell. | |
1358 | */ | |
1359 | if (fflush(LTTNG_LIVE_OUTPUT_FP) < 0) { | |
1360 | perror("fflush"); | |
1361 | goto end; | |
1362 | } | |
1363 | ||
4a744367 JD |
1364 | if (pos->packet_size == 0 || pos->offset == EOF) { |
1365 | goto end; | |
1366 | } | |
1367 | ||
1368 | printf_verbose("get_data_packet for stream %" PRIu64 "\n", | |
1369 | viewer_stream->id); | |
1370 | ret = get_data_packet(session->ctx, pos, viewer_stream, | |
c1e8ac81 | 1371 | cur_index->offset, |
f1f52630 | 1372 | cur_index->packet_size / CHAR_BIT); |
4a744367 JD |
1373 | if (ret == -2) { |
1374 | goto retry; | |
1375 | } else if (ret < 0) { | |
1376 | pos->offset = EOF; | |
e29395a8 JG |
1377 | if (!lttng_live_should_quit()) { |
1378 | fprintf(stderr, "[error] get_data_packet failed\n"); | |
1379 | } | |
4a744367 JD |
1380 | return; |
1381 | } | |
fb6b45aa | 1382 | viewer_stream->data_pending = 0; |
4a744367 | 1383 | |
fb6b45aa | 1384 | read_packet_header(pos, file_stream); |
4a744367 JD |
1385 | |
1386 | end: | |
1387 | return; | |
1388 | } | |
1389 | ||
2acdc547 JD |
1390 | int lttng_live_create_viewer_session(struct lttng_live_ctx *ctx) |
1391 | { | |
1392 | struct lttng_viewer_cmd cmd; | |
1393 | struct lttng_viewer_create_session_response resp; | |
1394 | int ret; | |
1395 | ssize_t ret_len; | |
1396 | ||
8ace20bf MD |
1397 | if (lttng_live_should_quit()) { |
1398 | ret = -1; | |
1399 | goto end; | |
1400 | } | |
1401 | ||
2acdc547 | 1402 | cmd.cmd = htobe32(LTTNG_VIEWER_CREATE_SESSION); |
259863bd | 1403 | cmd.data_size = htobe64((uint64_t) 0); |
e11a3d28 | 1404 | cmd.cmd_version = htobe32(0); |
2acdc547 | 1405 | |
b7e8a8e1 | 1406 | ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd)); |
2acdc547 | 1407 | if (ret_len < 0) { |
79620497 | 1408 | perror("[error] Error sending cmd"); |
2acdc547 JD |
1409 | goto error; |
1410 | } | |
1411 | assert(ret_len == sizeof(cmd)); | |
1412 | ||
b7e8a8e1 | 1413 | ret_len = lttng_live_recv(ctx->control_sock, &resp, sizeof(resp)); |
f8612f31 MD |
1414 | if (ret_len == 0) { |
1415 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
1416 | goto error; |
1417 | } | |
2acdc547 | 1418 | if (ret_len < 0) { |
79620497 | 1419 | perror("[error] Error receiving create session reply"); |
2acdc547 JD |
1420 | goto error; |
1421 | } | |
1422 | assert(ret_len == sizeof(resp)); | |
1423 | ||
1424 | if (be32toh(resp.status) != LTTNG_VIEWER_CREATE_SESSION_OK) { | |
1425 | fprintf(stderr, "[error] Error creating viewer session\n"); | |
2acdc547 JD |
1426 | goto error; |
1427 | } | |
1428 | ret = 0; | |
8ace20bf MD |
1429 | end: |
1430 | return ret; | |
2acdc547 JD |
1431 | |
1432 | error: | |
8ace20bf | 1433 | return -1; |
2acdc547 JD |
1434 | } |
1435 | ||
1436 | static | |
1437 | int del_traces(gpointer key, gpointer value, gpointer user_data) | |
4a744367 JD |
1438 | { |
1439 | struct bt_context *bt_ctx = user_data; | |
1440 | struct lttng_live_ctf_trace *trace = value; | |
1441 | int ret; | |
1442 | ||
1443 | ret = bt_context_remove_trace(bt_ctx, trace->trace_id); | |
1444 | if (ret < 0) | |
1445 | fprintf(stderr, "[error] removing trace from context\n"); | |
1446 | ||
1447 | /* remove the key/value pair from the HT. */ | |
1448 | return 1; | |
1449 | } | |
1450 | ||
2acdc547 | 1451 | static |
7840bb08 JD |
1452 | int add_one_trace(struct lttng_live_ctx *ctx, |
1453 | struct lttng_live_ctf_trace *trace) | |
4a744367 | 1454 | { |
9abca178 | 1455 | int i, ret; |
7840bb08 | 1456 | struct bt_context *bt_ctx = ctx->bt_ctx; |
4a744367 JD |
1457 | struct lttng_live_viewer_stream *stream; |
1458 | struct bt_mmap_stream *new_mmap_stream; | |
1459 | struct bt_mmap_stream_list mmap_list; | |
150595c4 JD |
1460 | struct bt_trace_descriptor *td; |
1461 | struct bt_trace_handle *handle; | |
4a744367 | 1462 | |
b5a1fa45 JD |
1463 | /* |
1464 | * We don't know how many streams we will receive for a trace, so | |
1465 | * once we are done receiving the traces, we add all the traces | |
1466 | * received to the bt_context. | |
1467 | * We can receive streams during the attach command or the | |
1468 | * get_new_streams, so we have to make sure not to add multiple | |
1469 | * times the same traces. | |
1470 | * If a trace is already in the context, we just skip this function. | |
1471 | */ | |
7840bb08 JD |
1472 | if (trace->in_use) { |
1473 | ret = 0; | |
1474 | goto end; | |
1475 | } | |
2acdc547 | 1476 | |
4a744367 JD |
1477 | BT_INIT_LIST_HEAD(&mmap_list.head); |
1478 | ||
1479 | for (i = 0; i < trace->streams->len; i++) { | |
1480 | stream = g_ptr_array_index(trace->streams, i); | |
4a744367 JD |
1481 | |
1482 | if (!stream->metadata_flag) { | |
1483 | new_mmap_stream = zmalloc(sizeof(struct bt_mmap_stream)); | |
1484 | new_mmap_stream->priv = (void *) stream; | |
1485 | new_mmap_stream->fd = -1; | |
1486 | bt_list_add(&new_mmap_stream->list, &mmap_list.head); | |
1487 | } else { | |
af701dc4 JD |
1488 | char *metadata_buf = NULL; |
1489 | ||
4a744367 | 1490 | /* Get all possible metadata before starting */ |
af701dc4 JD |
1491 | ret = get_new_metadata(ctx, stream, &metadata_buf); |
1492 | if (ret) { | |
1493 | free(metadata_buf); | |
1494 | goto end_free; | |
1495 | } | |
1496 | if (!stream->metadata_len) { | |
1497 | fprintf(stderr, "[error] empty metadata\n"); | |
1498 | ret = -1; | |
1499 | free(metadata_buf); | |
1500 | goto end_free; | |
1501 | } | |
1502 | ||
1503 | trace->metadata_fp = babeltrace_fmemopen(metadata_buf, | |
1504 | stream->metadata_len, "rb"); | |
1505 | if (!trace->metadata_fp) { | |
1506 | perror("Metadata fmemopen"); | |
1507 | ret = -1; | |
1508 | free(metadata_buf); | |
9abca178 | 1509 | goto end_free; |
af701dc4 | 1510 | } |
4a744367 JD |
1511 | } |
1512 | } | |
1513 | ||
1514 | if (!trace->metadata_fp) { | |
1515 | fprintf(stderr, "[error] No metadata stream opened\n"); | |
7840bb08 | 1516 | ret = -1; |
4a744367 JD |
1517 | goto end_free; |
1518 | } | |
1519 | ||
1520 | ret = bt_context_add_trace(bt_ctx, NULL, "ctf", | |
1521 | ctf_live_packet_seek, &mmap_list, trace->metadata_fp); | |
1522 | if (ret < 0) { | |
1523 | fprintf(stderr, "[error] Error adding trace\n"); | |
7840bb08 | 1524 | ret = -1; |
4a744367 JD |
1525 | goto end_free; |
1526 | } | |
af701dc4 JD |
1527 | trace->metadata_stream->metadata_len = 0; |
1528 | ||
150595c4 JD |
1529 | handle = (struct bt_trace_handle *) g_hash_table_lookup( |
1530 | bt_ctx->trace_handles, | |
1531 | (gpointer) (unsigned long) ret); | |
1532 | td = handle->td; | |
1533 | trace->handle = handle; | |
2acdc547 | 1534 | if (bt_ctx->current_iterator) { |
2acdc547 JD |
1535 | bt_iter_add_trace(bt_ctx->current_iterator, td); |
1536 | } | |
1537 | ||
4a744367 | 1538 | trace->trace_id = ret; |
2acdc547 | 1539 | trace->in_use = 1; |
4a744367 JD |
1540 | |
1541 | goto end; | |
1542 | ||
1543 | end_free: | |
1544 | bt_context_put(bt_ctx); | |
1545 | end: | |
7840bb08 JD |
1546 | return ret; |
1547 | } | |
1548 | ||
1549 | static | |
1550 | int add_traces(struct lttng_live_ctx *ctx) | |
1551 | { | |
1552 | int ret; | |
1553 | struct lttng_live_ctf_trace *trace; | |
1554 | GHashTableIter it; | |
1555 | gpointer key; | |
1556 | gpointer value; | |
1557 | ||
1558 | g_hash_table_iter_init(&it, ctx->session->ctf_traces); | |
1559 | while (g_hash_table_iter_next(&it, &key, &value)) { | |
1560 | trace = (struct lttng_live_ctf_trace *) value; | |
1561 | ret = add_one_trace(ctx, trace); | |
1562 | if (ret < 0) { | |
1563 | goto end; | |
1564 | } | |
1565 | } | |
1566 | ||
1567 | ret = 0; | |
1568 | ||
1569 | end: | |
1570 | return ret; | |
4a744367 JD |
1571 | } |
1572 | ||
73b2b0d1 JD |
1573 | /* |
1574 | * Request new streams for a session. | |
1575 | * Returns the number of streams received or a negative value on error. | |
1576 | */ | |
2acdc547 | 1577 | int lttng_live_get_new_streams(struct lttng_live_ctx *ctx, uint64_t id) |
6192b988 JD |
1578 | { |
1579 | struct lttng_viewer_cmd cmd; | |
2acdc547 JD |
1580 | struct lttng_viewer_new_streams_request rq; |
1581 | struct lttng_viewer_new_streams_response rp; | |
1582 | struct lttng_viewer_stream stream; | |
73b2b0d1 | 1583 | int ret, i, nb_streams = 0; |
6192b988 | 1584 | ssize_t ret_len; |
b5a1fa45 | 1585 | uint32_t stream_count; |
de417d04 JR |
1586 | const size_t cmd_buf_len = sizeof(cmd) + sizeof(rq); |
1587 | char cmd_buf[cmd_buf_len]; | |
6192b988 | 1588 | |
8ace20bf MD |
1589 | if (lttng_live_should_quit()) { |
1590 | ret = -1; | |
1591 | goto end; | |
1592 | } | |
1593 | ||
2acdc547 | 1594 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_NEW_STREAMS); |
259863bd | 1595 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); |
e11a3d28 | 1596 | cmd.cmd_version = htobe32(0); |
6192b988 | 1597 | |
2acdc547 JD |
1598 | memset(&rq, 0, sizeof(rq)); |
1599 | rq.session_id = htobe64(id); | |
1600 | ||
de417d04 JR |
1601 | /* |
1602 | * Merge the cmd and connection request to prevent a write-write | |
1603 | * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the | |
1604 | * second write to be performed quickly in presence of Nagle's algorithm. | |
1605 | */ | |
1606 | memcpy(cmd_buf, &cmd, sizeof(cmd)); | |
1607 | memcpy(cmd_buf + sizeof(cmd), &rq, sizeof(rq)); | |
6192b988 | 1608 | |
de417d04 | 1609 | ret_len = lttng_live_send(ctx->control_sock, cmd_buf, cmd_buf_len); |
6192b988 | 1610 | if (ret_len < 0) { |
de417d04 | 1611 | perror("[error] Error sending get_new_streams cmd and request"); |
6192b988 JD |
1612 | goto error; |
1613 | } | |
de417d04 | 1614 | assert(ret_len == cmd_buf_len); |
6192b988 | 1615 | |
b7e8a8e1 | 1616 | ret_len = lttng_live_recv(ctx->control_sock, &rp, sizeof(rp)); |
f8612f31 MD |
1617 | if (ret_len == 0) { |
1618 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
1619 | goto error; |
1620 | } | |
2acdc547 | 1621 | if (ret_len < 0) { |
79620497 | 1622 | perror("[error] Error receiving get_new_streams response"); |
6192b988 JD |
1623 | goto error; |
1624 | } | |
2acdc547 JD |
1625 | assert(ret_len == sizeof(rp)); |
1626 | ||
1627 | switch(be32toh(rp.status)) { | |
1628 | case LTTNG_VIEWER_NEW_STREAMS_OK: | |
1629 | break; | |
1630 | case LTTNG_VIEWER_NEW_STREAMS_NO_NEW: | |
1631 | ret = 0; | |
1632 | goto end; | |
1633 | case LTTNG_VIEWER_NEW_STREAMS_HUP: | |
1634 | ret = -LTTNG_VIEWER_NEW_STREAMS_HUP; | |
1635 | goto end; | |
1636 | case LTTNG_VIEWER_NEW_STREAMS_ERR: | |
1637 | fprintf(stderr, "[error] get_new_streams error\n"); | |
8ace20bf | 1638 | goto error; |
2acdc547 JD |
1639 | default: |
1640 | fprintf(stderr, "[error] Unknown return code %u\n", | |
1641 | be32toh(rp.status)); | |
8ace20bf | 1642 | goto error; |
2acdc547 JD |
1643 | } |
1644 | ||
b5a1fa45 JD |
1645 | stream_count = be32toh(rp.streams_count); |
1646 | ctx->session->stream_count += stream_count; | |
2acdc547 JD |
1647 | /* |
1648 | * When the session is created but not started, we do an active wait | |
1649 | * until it starts. It allows the viewer to start processing the trace | |
1650 | * as soon as the session starts. | |
1651 | */ | |
1652 | if (ctx->session->stream_count == 0) { | |
1653 | ret = 0; | |
1654 | goto end; | |
1655 | } | |
b5e7994d MD |
1656 | printf_verbose("Waiting for %d streams:\n", stream_count); |
1657 | ||
b5a1fa45 | 1658 | for (i = 0; i < stream_count; i++) { |
b5e7994d MD |
1659 | struct lttng_live_viewer_stream *lvstream; |
1660 | ||
1661 | lvstream = g_new0(struct lttng_live_viewer_stream, 1); | |
1662 | ret_len = lttng_live_recv(ctx->control_sock, &stream, | |
1663 | sizeof(stream)); | |
f8612f31 MD |
1664 | if (ret_len == 0) { |
1665 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
b5e7994d | 1666 | g_free(lvstream); |
f8612f31 MD |
1667 | goto error; |
1668 | } | |
2acdc547 | 1669 | if (ret_len < 0) { |
79620497 | 1670 | perror("[error] Error receiving stream"); |
b5e7994d | 1671 | g_free(lvstream); |
2acdc547 JD |
1672 | goto error; |
1673 | } | |
1674 | assert(ret_len == sizeof(stream)); | |
1675 | stream.path_name[LTTNG_VIEWER_PATH_MAX - 1] = '\0'; | |
1676 | stream.channel_name[LTTNG_VIEWER_NAME_MAX - 1] = '\0'; | |
1677 | ||
1678 | printf_verbose(" stream %" PRIu64 " : %s/%s\n", | |
1679 | be64toh(stream.id), stream.path_name, | |
1680 | stream.channel_name); | |
b5e7994d MD |
1681 | lvstream->id = be64toh(stream.id); |
1682 | lvstream->session = ctx->session; | |
2acdc547 | 1683 | |
b5e7994d MD |
1684 | lvstream->mmap_size = 0; |
1685 | lvstream->ctf_stream_id = -1ULL; | |
2acdc547 JD |
1686 | |
1687 | if (be32toh(stream.metadata_flag)) { | |
b5e7994d | 1688 | lvstream->metadata_flag = 1; |
2acdc547 | 1689 | } |
b5e7994d | 1690 | ret = lttng_live_ctf_trace_assign(lvstream, |
2acdc547 JD |
1691 | be64toh(stream.ctf_trace_id)); |
1692 | if (ret < 0) { | |
b5e7994d | 1693 | g_free(lvstream); |
2acdc547 JD |
1694 | goto error; |
1695 | } | |
73b2b0d1 | 1696 | nb_streams++; |
b5e7994d MD |
1697 | bt_list_add(&lvstream->stream_node, |
1698 | &ctx->session->stream_list); | |
2acdc547 | 1699 | } |
73b2b0d1 | 1700 | ret = nb_streams; |
2acdc547 | 1701 | end: |
6192b988 | 1702 | return ret; |
8ace20bf MD |
1703 | |
1704 | error: | |
1705 | return -1; | |
6192b988 JD |
1706 | } |
1707 | ||
28756729 | 1708 | int lttng_live_read(struct lttng_live_ctx *ctx) |
4a744367 | 1709 | { |
28756729 JG |
1710 | int ret = -1; |
1711 | int i; | |
4a744367 JD |
1712 | struct bt_ctf_iter *iter; |
1713 | const struct bt_ctf_event *event; | |
1714 | struct bt_iter_pos begin_pos; | |
1715 | struct bt_trace_descriptor *td_write; | |
1716 | struct bt_format *fmt_write; | |
1717 | struct ctf_text_stream_pos *sout; | |
2acdc547 | 1718 | uint64_t id; |
4a744367 | 1719 | |
2acdc547 JD |
1720 | ctx->bt_ctx = bt_context_create(); |
1721 | if (!ctx->bt_ctx) { | |
4a744367 JD |
1722 | fprintf(stderr, "[error] bt_context_create allocation\n"); |
1723 | goto end; | |
1724 | } | |
1725 | ||
1726 | fmt_write = bt_lookup_format(g_quark_from_static_string("text")); | |
1727 | if (!fmt_write) { | |
1728 | fprintf(stderr, "[error] ctf-text error\n"); | |
1729 | goto end; | |
1730 | } | |
1731 | ||
1732 | td_write = fmt_write->open_trace(NULL, O_RDWR, NULL, NULL); | |
1733 | if (!td_write) { | |
1734 | fprintf(stderr, "[error] Error opening output trace\n"); | |
1735 | goto end_free; | |
1736 | } | |
1737 | ||
1738 | sout = container_of(td_write, struct ctf_text_stream_pos, | |
1739 | trace_descriptor); | |
85bb4663 | 1740 | if (!sout->parent.event_cb) { |
4a744367 | 1741 | goto end_free; |
85bb4663 | 1742 | } |
4a744367 | 1743 | |
6192b988 JD |
1744 | ret = lttng_live_create_viewer_session(ctx); |
1745 | if (ret < 0) { | |
1746 | goto end_free; | |
1747 | } | |
1748 | ||
2acdc547 JD |
1749 | for (i = 0; i < ctx->session_ids->len; i++) { |
1750 | id = g_array_index(ctx->session_ids, uint64_t, i); | |
7e5e4176 | 1751 | printf_verbose("Attaching to session %" PRIu64 "\n", id); |
2acdc547 JD |
1752 | ret = lttng_live_attach_session(ctx, id); |
1753 | printf_verbose("Attaching session returns %d\n", ret); | |
1754 | if (ret < 0) { | |
1755 | if (ret == -LTTNG_VIEWER_ATTACH_UNK) { | |
1756 | fprintf(stderr, "[error] Unknown session ID\n"); | |
1757 | } | |
1758 | goto end_free; | |
1759 | } | |
1760 | } | |
1761 | ||
4a744367 | 1762 | /* |
2acdc547 | 1763 | * As long as the session is active, we try to get new streams. |
4a744367 | 1764 | */ |
2acdc547 | 1765 | for (;;) { |
4a744367 JD |
1766 | int flags; |
1767 | ||
8ace20bf | 1768 | if (lttng_live_should_quit()) { |
28756729 | 1769 | ret = 0; |
8ace20bf MD |
1770 | goto end_free; |
1771 | } | |
1772 | ||
2acdc547 | 1773 | while (!ctx->session->stream_count) { |
8ace20bf MD |
1774 | if (lttng_live_should_quit() |
1775 | || ctx->session_ids->len == 0) { | |
28756729 | 1776 | ret = 0; |
4a744367 | 1777 | goto end_free; |
85bb4663 | 1778 | } |
2acdc547 | 1779 | ret = ask_new_streams(ctx); |
85bb4663 | 1780 | if (ret < 0) { |
09aa42aa | 1781 | ret = 0; |
2acdc547 | 1782 | goto end_free; |
85bb4663 MD |
1783 | } |
1784 | if (!ctx->session->stream_count) { | |
85e2085e | 1785 | (void) poll(NULL, 0, ACTIVE_POLL_DELAY); |
85bb4663 | 1786 | } |
2acdc547 | 1787 | } |
4a744367 | 1788 | |
7840bb08 JD |
1789 | ret = add_traces(ctx); |
1790 | if (ret < 0) { | |
1791 | goto end_free; | |
1792 | } | |
4a744367 JD |
1793 | |
1794 | begin_pos.type = BT_SEEK_BEGIN; | |
2acdc547 | 1795 | iter = bt_ctf_iter_create(ctx->bt_ctx, &begin_pos, NULL); |
4a744367 | 1796 | if (!iter) { |
e29395a8 JG |
1797 | if (lttng_live_should_quit()) { |
1798 | ret = 0; | |
1799 | goto end; | |
1800 | } | |
4a744367 JD |
1801 | fprintf(stderr, "[error] Iterator creation error\n"); |
1802 | goto end; | |
1803 | } | |
1804 | for (;;) { | |
8ace20bf | 1805 | if (lttng_live_should_quit()) { |
28756729 | 1806 | ret = 0; |
8ace20bf MD |
1807 | goto end_free; |
1808 | } | |
4a744367 JD |
1809 | event = bt_ctf_iter_read_event_flags(iter, &flags); |
1810 | if (!(flags & BT_ITER_FLAG_RETRY)) { | |
1811 | if (!event) { | |
1812 | /* End of trace */ | |
1813 | break; | |
1814 | } | |
1815 | ret = sout->parent.event_cb(&sout->parent, | |
1816 | event->parent->stream); | |
1817 | if (ret) { | |
1818 | fprintf(stderr, "[error] Writing " | |
1819 | "event failed.\n"); | |
1820 | goto end_free; | |
1821 | } | |
1822 | } | |
1823 | ret = bt_iter_next(bt_ctf_get_iter(iter)); | |
1824 | if (ret < 0) { | |
1825 | goto end_free; | |
1826 | } | |
1827 | } | |
1828 | bt_ctf_iter_destroy(iter); | |
2acdc547 JD |
1829 | g_hash_table_foreach_remove(ctx->session->ctf_traces, |
1830 | del_traces, ctx->bt_ctx); | |
1831 | ctx->session->stream_count = 0; | |
1832 | } | |
4a744367 JD |
1833 | |
1834 | end_free: | |
2acdc547 | 1835 | bt_context_put(ctx->bt_ctx); |
4a744367 | 1836 | end: |
e29395a8 JG |
1837 | if (lttng_live_should_quit()) { |
1838 | ret = 0; | |
1839 | } | |
28756729 | 1840 | return ret; |
4a744367 | 1841 | } |