Commit | Line | Data |
---|---|---|
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 | 392 | trace->ctf_trace_id = ctf_trace_id; |
917bba7f | 393 | printf_verbose("Create trace ctf_trace_id %" PRIu64 "\n", ctf_trace_id); |
e88db11d | 394 | BT_INIT_LIST_HEAD(&trace->stream_list); |
4a744367 | 395 | g_hash_table_insert(stream->session->ctf_traces, |
37307240 | 396 | &trace->ctf_trace_id, |
4a744367 JD |
397 | trace); |
398 | } | |
399 | if (stream->metadata_flag) | |
400 | trace->metadata_stream = stream; | |
401 | ||
e88db11d MD |
402 | assert(!stream->in_trace); |
403 | stream->in_trace = 1; | |
4a744367 | 404 | stream->ctf_trace = trace; |
e88db11d | 405 | bt_list_add(&stream->trace_stream_node, &trace->stream_list); |
4a744367 | 406 | |
4a744367 JD |
407 | return ret; |
408 | } | |
409 | ||
af701dc4 JD |
410 | static |
411 | int open_metadata_fp_write(struct lttng_live_viewer_stream *stream, | |
412 | char **metadata_buf, size_t *size) | |
413 | { | |
414 | int ret = 0; | |
415 | ||
416 | stream->metadata_fp_write = | |
417 | babeltrace_open_memstream(metadata_buf, size); | |
418 | if (!stream->metadata_fp_write) { | |
419 | perror("Metadata open_memstream"); | |
420 | ret = -1; | |
421 | } | |
422 | ||
423 | return ret; | |
424 | } | |
425 | ||
4a744367 JD |
426 | int lttng_live_attach_session(struct lttng_live_ctx *ctx, uint64_t id) |
427 | { | |
428 | struct lttng_viewer_cmd cmd; | |
429 | struct lttng_viewer_attach_session_request rq; | |
430 | struct lttng_viewer_attach_session_response rp; | |
431 | struct lttng_viewer_stream stream; | |
de417d04 JR |
432 | const size_t cmd_buf_len = sizeof(cmd) + sizeof(rq); |
433 | char cmd_buf[cmd_buf_len]; | |
4a744367 JD |
434 | int ret, i; |
435 | ssize_t ret_len; | |
436 | ||
8ace20bf MD |
437 | if (lttng_live_should_quit()) { |
438 | ret = -1; | |
439 | goto end; | |
440 | } | |
441 | ||
4a744367 | 442 | cmd.cmd = htobe32(LTTNG_VIEWER_ATTACH_SESSION); |
259863bd | 443 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); |
e11a3d28 | 444 | cmd.cmd_version = htobe32(0); |
4a744367 JD |
445 | |
446 | memset(&rq, 0, sizeof(rq)); | |
447 | rq.session_id = htobe64(id); | |
448 | // TODO: add cmd line parameter to select seek beginning | |
449 | // rq.seek = htobe32(LTTNG_VIEWER_SEEK_BEGINNING); | |
450 | rq.seek = htobe32(LTTNG_VIEWER_SEEK_LAST); | |
451 | ||
de417d04 JR |
452 | /* |
453 | * Merge the cmd and connection request to prevent a write-write | |
454 | * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the | |
455 | * second write to be performed quickly in presence of Nagle's algorithm. | |
456 | */ | |
457 | memcpy(cmd_buf, &cmd, sizeof(cmd)); | |
458 | memcpy(cmd_buf + sizeof(cmd), &rq, sizeof(rq)); | |
4a744367 | 459 | |
de417d04 | 460 | ret_len = lttng_live_send(ctx->control_sock, cmd_buf, cmd_buf_len); |
4a744367 | 461 | if (ret_len < 0) { |
de417d04 | 462 | perror("[error] Error sending attach command and request"); |
4a744367 JD |
463 | goto error; |
464 | } | |
de417d04 | 465 | assert(ret_len == cmd_buf_len); |
4a744367 | 466 | |
b7e8a8e1 | 467 | ret_len = lttng_live_recv(ctx->control_sock, &rp, sizeof(rp)); |
f8612f31 MD |
468 | if (ret_len == 0) { |
469 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
470 | goto error; |
471 | } | |
4a744367 | 472 | if (ret_len < 0) { |
79620497 | 473 | perror("[error] Error receiving attach response"); |
4a744367 JD |
474 | goto error; |
475 | } | |
476 | assert(ret_len == sizeof(rp)); | |
477 | ||
478 | switch(be32toh(rp.status)) { | |
479 | case LTTNG_VIEWER_ATTACH_OK: | |
480 | break; | |
481 | case LTTNG_VIEWER_ATTACH_UNK: | |
482 | ret = -LTTNG_VIEWER_ATTACH_UNK; | |
483 | goto end; | |
484 | case LTTNG_VIEWER_ATTACH_ALREADY: | |
79620497 | 485 | fprintf(stderr, "[error] There is already a viewer attached to this session\n"); |
8ace20bf | 486 | goto error; |
4a744367 JD |
487 | case LTTNG_VIEWER_ATTACH_NOT_LIVE: |
488 | fprintf(stderr, "[error] Not a live session\n"); | |
8ace20bf | 489 | goto error; |
4a744367 JD |
490 | case LTTNG_VIEWER_ATTACH_SEEK_ERR: |
491 | fprintf(stderr, "[error] Wrong seek parameter\n"); | |
8ace20bf | 492 | goto error; |
4a744367 JD |
493 | default: |
494 | fprintf(stderr, "[error] Unknown attach return code %u\n", | |
495 | be32toh(rp.status)); | |
8ace20bf | 496 | goto error; |
4a744367 JD |
497 | } |
498 | if (be32toh(rp.status) != LTTNG_VIEWER_ATTACH_OK) { | |
8ace20bf | 499 | goto error; |
4a744367 JD |
500 | } |
501 | ||
2acdc547 | 502 | ctx->session->stream_count += be32toh(rp.streams_count); |
4a744367 JD |
503 | /* |
504 | * When the session is created but not started, we do an active wait | |
505 | * until it starts. It allows the viewer to start processing the trace | |
506 | * as soon as the session starts. | |
507 | */ | |
508 | if (ctx->session->stream_count == 0) { | |
509 | ret = 0; | |
510 | goto end; | |
511 | } | |
b5e7994d MD |
512 | printf_verbose("Waiting for %d streams:\n", |
513 | be32toh(rp.streams_count)); | |
4a744367 | 514 | for (i = 0; i < be32toh(rp.streams_count); i++) { |
b5e7994d MD |
515 | struct lttng_live_viewer_stream *lvstream; |
516 | ||
517 | lvstream = g_new0(struct lttng_live_viewer_stream, 1); | |
518 | ret_len = lttng_live_recv(ctx->control_sock, &stream, | |
519 | sizeof(stream)); | |
f8612f31 MD |
520 | if (ret_len == 0) { |
521 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
b5e7994d | 522 | g_free(lvstream); |
f8612f31 MD |
523 | goto error; |
524 | } | |
4a744367 | 525 | if (ret_len < 0) { |
79620497 | 526 | perror("[error] Error receiving stream"); |
b5e7994d | 527 | g_free(lvstream); |
4a744367 JD |
528 | goto error; |
529 | } | |
530 | assert(ret_len == sizeof(stream)); | |
9ed31e53 MD |
531 | stream.path_name[LTTNG_VIEWER_PATH_MAX - 1] = '\0'; |
532 | stream.channel_name[LTTNG_VIEWER_NAME_MAX - 1] = '\0'; | |
4a744367 JD |
533 | |
534 | printf_verbose(" stream %" PRIu64 " : %s/%s\n", | |
535 | be64toh(stream.id), stream.path_name, | |
536 | stream.channel_name); | |
b5e7994d MD |
537 | lvstream->id = be64toh(stream.id); |
538 | lvstream->session = ctx->session; | |
4a744367 | 539 | |
b5e7994d MD |
540 | lvstream->mmap_size = 0; |
541 | lvstream->ctf_stream_id = -1ULL; | |
4a744367 JD |
542 | |
543 | if (be32toh(stream.metadata_flag)) { | |
b5e7994d | 544 | lvstream->metadata_flag = 1; |
4a744367 | 545 | } |
b5e7994d | 546 | ret = lttng_live_ctf_trace_assign(lvstream, |
4a744367 JD |
547 | be64toh(stream.ctf_trace_id)); |
548 | if (ret < 0) { | |
b5e7994d | 549 | g_free(lvstream); |
4a744367 JD |
550 | goto error; |
551 | } | |
e88db11d | 552 | bt_list_add(&lvstream->session_stream_node, |
b5e7994d | 553 | &ctx->session->stream_list); |
4a744367 JD |
554 | } |
555 | ret = 0; | |
4a744367 | 556 | end: |
4a744367 | 557 | return ret; |
8ace20bf MD |
558 | |
559 | error: | |
560 | return -1; | |
4a744367 JD |
561 | } |
562 | ||
73b2b0d1 JD |
563 | /* |
564 | * Ask the relay for new streams. | |
565 | * | |
566 | * Returns the number of new streams received or a negative value on error. | |
567 | */ | |
2acdc547 JD |
568 | static |
569 | int ask_new_streams(struct lttng_live_ctx *ctx) | |
570 | { | |
73b2b0d1 | 571 | int i, ret = 0, nb_streams = 0; |
2acdc547 JD |
572 | uint64_t id; |
573 | ||
574 | restart: | |
575 | for (i = 0; i < ctx->session_ids->len; i++) { | |
576 | id = g_array_index(ctx->session_ids, uint64_t, i); | |
577 | ret = lttng_live_get_new_streams(ctx, id); | |
73b2b0d1 | 578 | printf_verbose("Asking for new streams returns %d\n", ret); |
09aa42aa MD |
579 | if (lttng_live_should_quit()) { |
580 | ret = -1; | |
581 | goto end; | |
582 | } | |
2acdc547 JD |
583 | if (ret < 0) { |
584 | if (ret == -LTTNG_VIEWER_NEW_STREAMS_HUP) { | |
585 | printf_verbose("Session %" PRIu64 " closed\n", | |
586 | id); | |
b5a1fa45 JD |
587 | /* |
588 | * The streams have already been closed during | |
589 | * the reading, so we only need to get rid of | |
590 | * the trace in our internal table of sessions. | |
591 | */ | |
2acdc547 JD |
592 | g_array_remove_index(ctx->session_ids, i); |
593 | /* | |
594 | * We can't continue iterating on the g_array | |
595 | * after a remove, we have to start again. | |
596 | */ | |
597 | goto restart; | |
598 | } else { | |
599 | ret = -1; | |
600 | goto end; | |
601 | } | |
73b2b0d1 JD |
602 | } else { |
603 | nb_streams += ret; | |
2acdc547 JD |
604 | } |
605 | } | |
2600cf83 MD |
606 | if (ctx->session_ids->len == 0) { |
607 | /* All sessions are closed. */ | |
608 | ret = -1; | |
609 | } else { | |
610 | ret = nb_streams; | |
611 | } | |
2acdc547 JD |
612 | |
613 | end: | |
614 | return ret; | |
615 | } | |
616 | ||
50d207af JD |
617 | static |
618 | int append_metadata(struct lttng_live_ctx *ctx, | |
619 | struct lttng_live_viewer_stream *viewer_stream) | |
620 | { | |
621 | int ret; | |
622 | struct lttng_live_viewer_stream *metadata; | |
623 | char *metadata_buf = NULL; | |
624 | ||
4d174373 MD |
625 | if (!viewer_stream->ctf_trace->handle) { |
626 | printf_verbose("append_metadata: trace handle not ready yet.\n"); | |
627 | return 0; | |
628 | } | |
629 | ||
50d207af JD |
630 | printf_verbose("get_next_index: new metadata needed\n"); |
631 | ret = get_new_metadata(ctx, viewer_stream, &metadata_buf); | |
632 | if (ret < 0) { | |
633 | free(metadata_buf); | |
634 | goto error; | |
635 | } | |
636 | ||
637 | metadata = viewer_stream->ctf_trace->metadata_stream; | |
638 | metadata->ctf_trace->metadata_fp = | |
639 | babeltrace_fmemopen(metadata_buf, | |
640 | metadata->metadata_len, "rb"); | |
641 | if (!metadata->ctf_trace->metadata_fp) { | |
642 | perror("Metadata fmemopen"); | |
643 | free(metadata_buf); | |
644 | ret = -1; | |
645 | goto error; | |
646 | } | |
647 | ret = ctf_append_trace_metadata( | |
648 | viewer_stream->ctf_trace->handle->td, | |
649 | metadata->ctf_trace->metadata_fp); | |
251fc08c MD |
650 | /* We accept empty metadata packets */ |
651 | if (ret != 0 && ret != -ENOENT) { | |
50d207af JD |
652 | fprintf(stderr, "[error] Appending metadata\n"); |
653 | goto error; | |
654 | } | |
251fc08c | 655 | ret = 0; |
50d207af JD |
656 | |
657 | error: | |
658 | return ret; | |
659 | } | |
660 | ||
4a744367 JD |
661 | static |
662 | int get_data_packet(struct lttng_live_ctx *ctx, | |
663 | struct ctf_stream_pos *pos, | |
664 | struct lttng_live_viewer_stream *stream, uint64_t offset, | |
665 | uint64_t len) | |
666 | { | |
667 | struct lttng_viewer_cmd cmd; | |
668 | struct lttng_viewer_get_packet rq; | |
669 | struct lttng_viewer_trace_packet rp; | |
de417d04 JR |
670 | const size_t cmd_buf_len = sizeof(cmd) + sizeof(rq); |
671 | char cmd_buf[cmd_buf_len]; | |
4a744367 JD |
672 | ssize_t ret_len; |
673 | int ret; | |
674 | ||
50d207af | 675 | retry: |
8ace20bf MD |
676 | if (lttng_live_should_quit()) { |
677 | ret = -1; | |
678 | goto end; | |
679 | } | |
857eaa68 | 680 | |
4a744367 | 681 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_PACKET); |
259863bd | 682 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); |
e11a3d28 | 683 | cmd.cmd_version = htobe32(0); |
4a744367 JD |
684 | |
685 | memset(&rq, 0, sizeof(rq)); | |
686 | rq.stream_id = htobe64(stream->id); | |
c1e8ac81 | 687 | rq.offset = htobe64(offset); |
4a744367 JD |
688 | rq.len = htobe32(len); |
689 | ||
de417d04 JR |
690 | /* |
691 | * Merge the cmd and connection request to prevent a write-write | |
692 | * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the | |
693 | * second write to be performed quickly in presence of Nagle's algorithm. | |
694 | */ | |
695 | memcpy(cmd_buf, &cmd, sizeof(cmd)); | |
696 | memcpy(cmd_buf + sizeof(cmd), &rq, sizeof(rq)); | |
4a744367 | 697 | |
de417d04 | 698 | ret_len = lttng_live_send(ctx->control_sock, cmd_buf, cmd_buf_len); |
4a744367 | 699 | if (ret_len < 0) { |
de417d04 | 700 | perror("[error] Error sending get_data_packet cmd and request"); |
4a744367 JD |
701 | goto error; |
702 | } | |
de417d04 | 703 | assert(ret_len == cmd_buf_len); |
4a744367 | 704 | |
b7e8a8e1 | 705 | ret_len = lttng_live_recv(ctx->control_sock, &rp, sizeof(rp)); |
f8612f31 MD |
706 | if (ret_len == 0) { |
707 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
708 | goto error; |
709 | } | |
4a744367 | 710 | if (ret_len < 0) { |
79620497 | 711 | perror("[error] Error receiving data response"); |
4a744367 JD |
712 | goto error; |
713 | } | |
57b9d843 | 714 | if (ret_len != sizeof(rp)) { |
7e5e4176 MD |
715 | fprintf(stderr, "[error] get_data_packet: expected %zu" |
716 | ", received %zd\n", sizeof(rp), | |
a5e4b11e | 717 | ret_len); |
57b9d843 JD |
718 | goto error; |
719 | } | |
4a744367 JD |
720 | |
721 | rp.flags = be32toh(rp.flags); | |
722 | ||
723 | switch (be32toh(rp.status)) { | |
724 | case LTTNG_VIEWER_GET_PACKET_OK: | |
725 | len = be32toh(rp.len); | |
726 | printf_verbose("get_data_packet: Ok, packet size : %" PRIu64 | |
727 | "\n", len); | |
728 | break; | |
729 | case LTTNG_VIEWER_GET_PACKET_RETRY: | |
8ace20bf | 730 | /* Unimplemented by relay daemon */ |
4a744367 | 731 | printf_verbose("get_data_packet: retry\n"); |
8ace20bf | 732 | goto error; |
4a744367 JD |
733 | case LTTNG_VIEWER_GET_PACKET_ERR: |
734 | if (rp.flags & LTTNG_VIEWER_FLAG_NEW_METADATA) { | |
735 | printf_verbose("get_data_packet: new metadata needed\n"); | |
50d207af JD |
736 | ret = append_metadata(ctx, stream); |
737 | if (ret) | |
738 | goto error; | |
4a744367 | 739 | } |
2acdc547 | 740 | if (rp.flags & LTTNG_VIEWER_FLAG_NEW_STREAM) { |
f312b3aa | 741 | printf_verbose("get_data_packet: new streams needed\n"); |
2acdc547 | 742 | ret = ask_new_streams(ctx); |
7840bb08 | 743 | if (ret < 0) { |
2acdc547 | 744 | goto error; |
7840bb08 JD |
745 | } else if (ret > 0) { |
746 | ret = add_traces(ctx); | |
747 | if (ret < 0) { | |
748 | goto error; | |
749 | } | |
750 | } | |
2acdc547 | 751 | } |
f312b3aa MD |
752 | if (rp.flags & (LTTNG_VIEWER_FLAG_NEW_METADATA |
753 | | LTTNG_VIEWER_FLAG_NEW_STREAM)) { | |
754 | goto retry; | |
755 | } | |
4a744367 | 756 | fprintf(stderr, "[error] get_data_packet: error\n"); |
8ace20bf | 757 | goto error; |
4a744367 JD |
758 | case LTTNG_VIEWER_GET_PACKET_EOF: |
759 | ret = -2; | |
8ace20bf | 760 | goto end; |
4a744367 JD |
761 | default: |
762 | printf_verbose("get_data_packet: unknown\n"); | |
8ace20bf | 763 | goto error; |
4a744367 JD |
764 | } |
765 | ||
65ae9a82 | 766 | if (len == 0) { |
96943040 | 767 | goto error; |
4a744367 JD |
768 | } |
769 | ||
770 | if (len > stream->mmap_size) { | |
771 | uint64_t new_size; | |
772 | ||
773 | new_size = max_t(uint64_t, len, stream->mmap_size << 1); | |
774 | if (pos->base_mma) { | |
775 | /* unmap old base */ | |
776 | ret = munmap_align(pos->base_mma); | |
777 | if (ret) { | |
79620497 | 778 | perror("[error] Unable to unmap old base"); |
4a744367 JD |
779 | goto error; |
780 | } | |
781 | pos->base_mma = NULL; | |
782 | } | |
783 | pos->base_mma = mmap_align(new_size, | |
784 | PROT_READ | PROT_WRITE, | |
785 | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); | |
786 | if (pos->base_mma == MAP_FAILED) { | |
79620497 | 787 | perror("[error] mmap error"); |
4a744367 | 788 | pos->base_mma = NULL; |
4a744367 JD |
789 | goto error; |
790 | } | |
791 | ||
792 | stream->mmap_size = new_size; | |
793 | printf_verbose("Expanding stream mmap size to %" PRIu64 " bytes\n", | |
794 | stream->mmap_size); | |
795 | } | |
796 | ||
b7e8a8e1 MD |
797 | ret_len = lttng_live_recv(ctx->control_sock, |
798 | mmap_align_addr(pos->base_mma), len); | |
f8612f31 MD |
799 | if (ret_len == 0) { |
800 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
801 | goto error; |
802 | } | |
4a744367 | 803 | if (ret_len < 0) { |
79620497 | 804 | perror("[error] Error receiving trace packet"); |
4a744367 JD |
805 | goto error; |
806 | } | |
807 | assert(ret_len == len); | |
f312b3aa | 808 | ret = 0; |
4a744367 | 809 | end: |
4a744367 | 810 | return ret; |
8ace20bf MD |
811 | |
812 | error: | |
813 | return -1; | |
4a744367 JD |
814 | } |
815 | ||
4a744367 | 816 | static |
9abca178 JD |
817 | int get_one_metadata_packet(struct lttng_live_ctx *ctx, |
818 | struct lttng_live_viewer_stream *metadata_stream) | |
4a744367 JD |
819 | { |
820 | uint64_t len = 0; | |
821 | int ret; | |
822 | struct lttng_viewer_cmd cmd; | |
823 | struct lttng_viewer_get_metadata rq; | |
824 | struct lttng_viewer_metadata_packet rp; | |
4a744367 JD |
825 | char *data = NULL; |
826 | ssize_t ret_len; | |
de417d04 JR |
827 | const size_t cmd_buf_len = sizeof(cmd) + sizeof(rq); |
828 | char cmd_buf[cmd_buf_len]; | |
4a744367 | 829 | |
8ace20bf MD |
830 | if (lttng_live_should_quit()) { |
831 | ret = -1; | |
832 | goto end; | |
833 | } | |
834 | ||
9abca178 | 835 | rq.stream_id = htobe64(metadata_stream->id); |
4a744367 | 836 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_METADATA); |
259863bd | 837 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); |
e11a3d28 | 838 | cmd.cmd_version = htobe32(0); |
4a744367 | 839 | |
de417d04 JR |
840 | /* |
841 | * Merge the cmd and connection request to prevent a write-write | |
842 | * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the | |
843 | * second write to be performed quickly in presence of Nagle's algorithm. | |
844 | */ | |
845 | memcpy(cmd_buf, &cmd, sizeof(cmd)); | |
846 | memcpy(cmd_buf + sizeof(cmd), &rq, sizeof(rq)); | |
4a744367 | 847 | |
917bba7f JD |
848 | printf_verbose("get_metadata for trace_id: %d, ctf_trace_id: %" PRIu64 "\n", |
849 | metadata_stream->ctf_trace->trace_id, | |
850 | metadata_stream->ctf_trace->ctf_trace_id); | |
de417d04 | 851 | ret_len = lttng_live_send(ctx->control_sock, cmd_buf, cmd_buf_len); |
4a744367 | 852 | if (ret_len < 0) { |
de417d04 | 853 | perror("[error] Error sending get_metadata cmd and request"); |
4a744367 JD |
854 | goto error; |
855 | } | |
de417d04 | 856 | assert(ret_len == cmd_buf_len); |
4a744367 | 857 | |
b7e8a8e1 | 858 | ret_len = lttng_live_recv(ctx->control_sock, &rp, sizeof(rp)); |
f8612f31 MD |
859 | if (ret_len == 0) { |
860 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
861 | goto error; |
862 | } | |
4a744367 | 863 | if (ret_len < 0) { |
79620497 | 864 | perror("[error] Error receiving metadata response"); |
4a744367 JD |
865 | goto error; |
866 | } | |
867 | assert(ret_len == sizeof(rp)); | |
868 | ||
869 | switch (be32toh(rp.status)) { | |
870 | case LTTNG_VIEWER_METADATA_OK: | |
871 | printf_verbose("get_metadata : OK\n"); | |
872 | break; | |
873 | case LTTNG_VIEWER_NO_NEW_METADATA: | |
874 | printf_verbose("get_metadata : NO NEW\n"); | |
9abca178 | 875 | ret = 0; |
4a744367 JD |
876 | goto end; |
877 | case LTTNG_VIEWER_METADATA_ERR: | |
878 | printf_verbose("get_metadata : ERR\n"); | |
8ace20bf | 879 | goto error; |
4a744367 JD |
880 | default: |
881 | printf_verbose("get_metadata : UNKNOWN\n"); | |
8ace20bf | 882 | goto error; |
4a744367 JD |
883 | } |
884 | ||
885 | len = be64toh(rp.len); | |
886 | printf_verbose("Writing %" PRIu64" bytes to metadata\n", len); | |
887 | if (len <= 0) { | |
8ace20bf | 888 | goto error; |
4a744367 JD |
889 | } |
890 | ||
891 | data = zmalloc(len); | |
892 | if (!data) { | |
893 | perror("relay data zmalloc"); | |
4a744367 JD |
894 | goto error; |
895 | } | |
b7e8a8e1 | 896 | ret_len = lttng_live_recv(ctx->control_sock, data, len); |
f8612f31 MD |
897 | if (ret_len == 0) { |
898 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
8ace20bf | 899 | goto error_free_data; |
f8612f31 | 900 | } |
4a744367 | 901 | if (ret_len < 0) { |
79620497 | 902 | perror("[error] Error receiving trace packet"); |
8ace20bf | 903 | goto error_free_data; |
4a744367 JD |
904 | } |
905 | assert(ret_len == len); | |
906 | ||
907 | do { | |
af701dc4 JD |
908 | ret_len = fwrite(data, 1, len, |
909 | metadata_stream->metadata_fp_write); | |
4a744367 JD |
910 | } while (ret_len < 0 && errno == EINTR); |
911 | if (ret_len < 0) { | |
af701dc4 | 912 | fprintf(stderr, "[error] Writing in the metadata fp\n"); |
8ace20bf | 913 | goto error_free_data; |
4a744367 JD |
914 | } |
915 | assert(ret_len == len); | |
af701dc4 | 916 | metadata_stream->metadata_len += len; |
8ace20bf | 917 | free(data); |
9abca178 | 918 | ret = len; |
8ace20bf MD |
919 | end: |
920 | return ret; | |
4a744367 | 921 | |
8ace20bf | 922 | error_free_data: |
4a744367 | 923 | free(data); |
4a744367 | 924 | error: |
8ace20bf | 925 | return -1; |
4a744367 JD |
926 | } |
927 | ||
9abca178 JD |
928 | /* |
929 | * Return 0 on success, a negative value on error. | |
930 | */ | |
931 | static | |
932 | int get_new_metadata(struct lttng_live_ctx *ctx, | |
af701dc4 JD |
933 | struct lttng_live_viewer_stream *viewer_stream, |
934 | char **metadata_buf) | |
9abca178 JD |
935 | { |
936 | int ret = 0; | |
937 | struct lttng_live_viewer_stream *metadata_stream; | |
73b2b0d1 | 938 | size_t size, len_read = 0; |
9abca178 JD |
939 | |
940 | metadata_stream = viewer_stream->ctf_trace->metadata_stream; | |
50d207af JD |
941 | if (!metadata_stream) { |
942 | fprintf(stderr, "[error] No metadata stream\n"); | |
943 | ret = -1; | |
944 | goto error; | |
945 | } | |
af701dc4 JD |
946 | metadata_stream->metadata_len = 0; |
947 | ret = open_metadata_fp_write(metadata_stream, metadata_buf, &size); | |
948 | if (ret < 0) { | |
949 | goto error; | |
950 | } | |
9abca178 JD |
951 | |
952 | do { | |
d1694e41 JD |
953 | if (lttng_live_should_quit()) { |
954 | ret = -1; | |
955 | goto error; | |
956 | } | |
9abca178 JD |
957 | /* |
958 | * get_one_metadata_packet returns the number of bytes | |
959 | * received, 0 when we have received everything, a | |
960 | * negative value on error. | |
961 | */ | |
962 | ret = get_one_metadata_packet(ctx, metadata_stream); | |
c111d5d7 MD |
963 | if (ret > 0) { |
964 | len_read += ret; | |
965 | } | |
85e2085e MD |
966 | if (!len_read) { |
967 | (void) poll(NULL, 0, ACTIVE_POLL_DELAY); | |
968 | } | |
27da2781 MD |
969 | if (ret < 0) { |
970 | break; /* Stop on error. */ | |
971 | } | |
c111d5d7 | 972 | } while (ret > 0 || !len_read); |
9abca178 | 973 | |
91bb0024 MD |
974 | if (babeltrace_close_memstream(metadata_buf, &size, |
975 | metadata_stream->metadata_fp_write)) { | |
976 | perror("babeltrace_close_memstream"); | |
977 | } | |
af701dc4 JD |
978 | metadata_stream->metadata_fp_write = NULL; |
979 | ||
980 | error: | |
9abca178 JD |
981 | return ret; |
982 | } | |
983 | ||
fb6b45aa JD |
984 | /* |
985 | * Assign the fields from a lttng_viewer_index to a packet_index. | |
986 | */ | |
987 | static | |
988 | void lttng_index_to_packet_index(struct lttng_viewer_index *lindex, | |
989 | struct packet_index *pindex) | |
990 | { | |
991 | assert(lindex); | |
992 | assert(pindex); | |
993 | ||
994 | pindex->offset = be64toh(lindex->offset); | |
995 | pindex->packet_size = be64toh(lindex->packet_size); | |
996 | pindex->content_size = be64toh(lindex->content_size); | |
997 | pindex->ts_cycles.timestamp_begin = be64toh(lindex->timestamp_begin); | |
998 | pindex->ts_cycles.timestamp_end = be64toh(lindex->timestamp_end); | |
999 | pindex->events_discarded = be64toh(lindex->events_discarded); | |
1000 | } | |
1001 | ||
4a744367 JD |
1002 | /* |
1003 | * Get one index for a stream. | |
1004 | * | |
1005 | * Returns 0 on success or a negative value on error. | |
1006 | */ | |
1007 | static | |
1008 | int get_next_index(struct lttng_live_ctx *ctx, | |
1009 | struct lttng_live_viewer_stream *viewer_stream, | |
fb6b45aa | 1010 | struct packet_index *index, uint64_t *stream_id) |
4a744367 JD |
1011 | { |
1012 | struct lttng_viewer_cmd cmd; | |
1013 | struct lttng_viewer_get_next_index rq; | |
4a744367 | 1014 | int ret; |
4a744367 | 1015 | ssize_t ret_len; |
fb6b45aa | 1016 | struct lttng_viewer_index *rp = &viewer_stream->current_index; |
de417d04 JR |
1017 | const size_t cmd_buf_len = sizeof(cmd) + sizeof(rq); |
1018 | char cmd_buf[cmd_buf_len]; | |
4a744367 JD |
1019 | |
1020 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_NEXT_INDEX); | |
259863bd | 1021 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); |
e11a3d28 | 1022 | cmd.cmd_version = htobe32(0); |
4a744367 JD |
1023 | |
1024 | memset(&rq, 0, sizeof(rq)); | |
1025 | rq.stream_id = htobe64(viewer_stream->id); | |
1026 | ||
de417d04 JR |
1027 | /* |
1028 | * Merge the cmd and connection request to prevent a write-write | |
1029 | * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the | |
1030 | * second write to be performed quickly in presence of Nagle's algorithm. | |
1031 | */ | |
1032 | memcpy(cmd_buf, &cmd, sizeof(cmd)); | |
1033 | memcpy(cmd_buf + sizeof(cmd), &rq, sizeof(rq)); | |
4a744367 | 1034 | retry: |
8ace20bf MD |
1035 | if (lttng_live_should_quit()) { |
1036 | ret = -1; | |
1037 | goto end; | |
1038 | } | |
de417d04 | 1039 | ret_len = lttng_live_send(ctx->control_sock, &cmd_buf, cmd_buf_len); |
4a744367 | 1040 | if (ret_len < 0) { |
de417d04 | 1041 | perror("[error] Error sending get_next_index cmd and request"); |
4a744367 JD |
1042 | goto error; |
1043 | } | |
de417d04 | 1044 | assert(ret_len == cmd_buf_len); |
4a744367 | 1045 | |
fb6b45aa | 1046 | ret_len = lttng_live_recv(ctx->control_sock, rp, sizeof(*rp)); |
f8612f31 MD |
1047 | if (ret_len == 0) { |
1048 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
1049 | goto error; |
1050 | } | |
4a744367 | 1051 | if (ret_len < 0) { |
79620497 | 1052 | perror("[error] Error receiving index response"); |
4a744367 JD |
1053 | goto error; |
1054 | } | |
fb6b45aa | 1055 | assert(ret_len == sizeof(*rp)); |
4a744367 | 1056 | |
fb6b45aa | 1057 | rp->flags = be32toh(rp->flags); |
4a744367 | 1058 | |
fb6b45aa | 1059 | switch (be32toh(rp->status)) { |
4a744367 JD |
1060 | case LTTNG_VIEWER_INDEX_INACTIVE: |
1061 | printf_verbose("get_next_index: inactive\n"); | |
4594dbd8 JR |
1062 | |
1063 | if (index->ts_cycles.timestamp_end == | |
1064 | be64toh(rp->timestamp_end)) { | |
1065 | /* Already seen this timestamp. */ | |
1066 | (void) poll(NULL, 0, ACTIVE_POLL_DELAY); | |
1067 | } | |
1068 | ||
4a744367 | 1069 | memset(index, 0, sizeof(struct packet_index)); |
fb6b45aa JD |
1070 | index->ts_cycles.timestamp_end = be64toh(rp->timestamp_end); |
1071 | *stream_id = be64toh(rp->stream_id); | |
4a744367 JD |
1072 | break; |
1073 | case LTTNG_VIEWER_INDEX_OK: | |
1074 | printf_verbose("get_next_index: Ok, need metadata update : %u\n", | |
fb6b45aa JD |
1075 | rp->flags & LTTNG_VIEWER_FLAG_NEW_METADATA); |
1076 | lttng_index_to_packet_index(rp, index); | |
1077 | *stream_id = be64toh(rp->stream_id); | |
1078 | viewer_stream->data_pending = 1; | |
4a744367 | 1079 | |
fb6b45aa | 1080 | if (rp->flags & LTTNG_VIEWER_FLAG_NEW_METADATA) { |
50d207af JD |
1081 | ret = append_metadata(ctx, viewer_stream); |
1082 | if (ret) | |
4a744367 | 1083 | goto error; |
4a744367 | 1084 | } |
fb6b45aa | 1085 | if (rp->flags & LTTNG_VIEWER_FLAG_NEW_STREAM) { |
73b2b0d1 | 1086 | printf_verbose("get_next_index: need new streams\n"); |
2acdc547 | 1087 | ret = ask_new_streams(ctx); |
7840bb08 | 1088 | if (ret < 0) { |
2acdc547 | 1089 | goto error; |
7840bb08 JD |
1090 | } else if (ret > 0) { |
1091 | ret = add_traces(ctx); | |
1092 | if (ret < 0) { | |
1093 | goto error; | |
1094 | } | |
1095 | } | |
2acdc547 | 1096 | } |
4a744367 JD |
1097 | break; |
1098 | case LTTNG_VIEWER_INDEX_RETRY: | |
1099 | printf_verbose("get_next_index: retry\n"); | |
85e2085e | 1100 | (void) poll(NULL, 0, ACTIVE_POLL_DELAY); |
4a744367 JD |
1101 | goto retry; |
1102 | case LTTNG_VIEWER_INDEX_HUP: | |
1103 | printf_verbose("get_next_index: stream hung up\n"); | |
1104 | viewer_stream->id = -1ULL; | |
4a744367 | 1105 | index->offset = EOF; |
2acdc547 | 1106 | ctx->session->stream_count--; |
e88db11d MD |
1107 | viewer_stream->in_trace = 0; |
1108 | bt_list_del(&viewer_stream->trace_stream_node); | |
1109 | bt_list_del(&viewer_stream->session_stream_node); | |
1110 | g_free(viewer_stream); | |
9c8366a9 | 1111 | *stream_id = be64toh(rp->stream_id); |
4a744367 JD |
1112 | break; |
1113 | case LTTNG_VIEWER_INDEX_ERR: | |
1114 | fprintf(stderr, "[error] get_next_index: error\n"); | |
4a744367 JD |
1115 | goto error; |
1116 | default: | |
1117 | fprintf(stderr, "[error] get_next_index: unkwown value\n"); | |
4a744367 JD |
1118 | goto error; |
1119 | } | |
4a744367 | 1120 | ret = 0; |
8ace20bf MD |
1121 | end: |
1122 | return ret; | |
4a744367 JD |
1123 | |
1124 | error: | |
8ace20bf | 1125 | return -1; |
4a744367 JD |
1126 | } |
1127 | ||
fb6b45aa JD |
1128 | static |
1129 | void read_packet_header(struct ctf_stream_pos *pos, | |
1130 | struct ctf_file_stream *file_stream) | |
1131 | { | |
1132 | int ret; | |
1133 | ||
1134 | /* update trace_packet_header and stream_packet_context */ | |
fcf10417 JG |
1135 | if (!(pos->prot & PROT_WRITE) && |
1136 | file_stream->parent.trace_packet_header) { | |
fb6b45aa JD |
1137 | /* Read packet header */ |
1138 | ret = generic_rw(&pos->parent, | |
1139 | &file_stream->parent.trace_packet_header->p); | |
1140 | if (ret) { | |
1141 | pos->offset = EOF; | |
1142 | fprintf(stderr, "[error] trace packet " | |
1143 | "header read failed\n"); | |
1144 | goto end; | |
1145 | } | |
1146 | } | |
fcf10417 JG |
1147 | if (!(pos->prot & PROT_WRITE) && |
1148 | file_stream->parent.stream_packet_context) { | |
fb6b45aa JD |
1149 | /* Read packet context */ |
1150 | ret = generic_rw(&pos->parent, | |
1151 | &file_stream->parent.stream_packet_context->p); | |
1152 | if (ret) { | |
1153 | pos->offset = EOF; | |
1154 | fprintf(stderr, "[error] stream packet " | |
1155 | "context read failed\n"); | |
1156 | goto end; | |
1157 | } | |
1158 | } | |
1159 | pos->data_offset = pos->offset; | |
1160 | ||
1161 | end: | |
1162 | return; | |
1163 | } | |
1164 | ||
1165 | /* | |
1166 | * Handle the seek parameters. | |
1167 | * Returns 0 if the packet_seek can continue, a positive value to | |
1168 | * cleanly exit the packet_seek, a negative value on error. | |
1169 | */ | |
1170 | static | |
1171 | int handle_seek_position(size_t index, int whence, | |
1172 | struct lttng_live_viewer_stream *viewer_stream, | |
1173 | struct ctf_stream_pos *pos, | |
1174 | struct ctf_file_stream *file_stream) | |
1175 | { | |
6a724a1e | 1176 | int ret = 0; |
fb6b45aa JD |
1177 | |
1178 | switch (whence) { | |
1179 | case SEEK_CUR: | |
1180 | ret = 0; | |
1181 | goto end; | |
1182 | case SEEK_SET: | |
1183 | /* | |
1184 | * We only allow to seek to 0. | |
1185 | */ | |
1186 | if (index != 0) { | |
1187 | fprintf(stderr, "[error] Arbitrary seek in lttng-live " | |
1188 | "trace not supported\n"); | |
1189 | pos->offset = EOF; | |
1190 | ret = -1; | |
1191 | goto end; | |
1192 | } | |
1193 | ||
1194 | ret = 0; | |
1195 | goto end; | |
1196 | ||
1197 | default: | |
1198 | fprintf(stderr, "[error] Invalid seek parameter\n"); | |
1199 | assert(0); | |
1200 | } | |
1201 | ||
1202 | end: | |
1203 | return ret; | |
1204 | } | |
1205 | ||
b5a1fa45 | 1206 | static |
4a744367 JD |
1207 | void ctf_live_packet_seek(struct bt_stream_pos *stream_pos, size_t index, |
1208 | int whence) | |
1209 | { | |
1210 | struct ctf_stream_pos *pos; | |
1211 | struct ctf_file_stream *file_stream; | |
f1f52630 | 1212 | struct packet_index *prev_index = NULL, *cur_index; |
4a744367 JD |
1213 | struct lttng_live_viewer_stream *viewer_stream; |
1214 | struct lttng_live_session *session; | |
fb6b45aa | 1215 | uint64_t stream_id = -1ULL; |
4a744367 JD |
1216 | int ret; |
1217 | ||
4a744367 JD |
1218 | pos = ctf_pos(stream_pos); |
1219 | file_stream = container_of(pos, struct ctf_file_stream, pos); | |
1220 | viewer_stream = (struct lttng_live_viewer_stream *) pos->priv; | |
1221 | session = viewer_stream->session; | |
1222 | ||
fb6b45aa JD |
1223 | ret = handle_seek_position(index, whence, viewer_stream, pos, |
1224 | file_stream); | |
1225 | if (ret != 0) { | |
1226 | return; | |
1227 | } | |
1228 | ||
1229 | retry: | |
f1f52630 MD |
1230 | switch (pos->packet_index->len) { |
1231 | case 0: | |
1232 | g_array_set_size(pos->packet_index, 1); | |
1233 | cur_index = &g_array_index(pos->packet_index, | |
1234 | struct packet_index, 0); | |
1235 | break; | |
1236 | case 1: | |
1237 | g_array_set_size(pos->packet_index, 2); | |
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 | case 2: | |
1244 | g_array_index(pos->packet_index, | |
1245 | struct packet_index, 0) = | |
1246 | g_array_index(pos->packet_index, | |
1247 | struct packet_index, 1); | |
1248 | prev_index = &g_array_index(pos->packet_index, | |
1249 | struct packet_index, 0); | |
1250 | cur_index = &g_array_index(pos->packet_index, | |
1251 | struct packet_index, 1); | |
1252 | break; | |
1253 | default: | |
1254 | abort(); | |
1255 | break; | |
1256 | } | |
fb6b45aa JD |
1257 | |
1258 | if (viewer_stream->data_pending) { | |
1259 | lttng_index_to_packet_index(&viewer_stream->current_index, cur_index); | |
1260 | } else { | |
1261 | printf_verbose("get_next_index for stream %" PRIu64 "\n", viewer_stream->id); | |
1262 | ret = get_next_index(session->ctx, viewer_stream, cur_index, &stream_id); | |
1263 | if (ret < 0) { | |
1264 | pos->offset = EOF; | |
1265 | if (!lttng_live_should_quit()) { | |
1266 | fprintf(stderr, "[error] get_next_index failed\n"); | |
1267 | } | |
1268 | return; | |
e29395a8 | 1269 | } |
fb6b45aa JD |
1270 | printf_verbose("Index received : packet_size : %" PRIu64 |
1271 | ", offset %" PRIu64 ", content_size %" PRIu64 | |
1272 | ", timestamp_end : %" PRIu64 "\n", | |
1273 | cur_index->packet_size, cur_index->offset, | |
1274 | cur_index->content_size, | |
1275 | cur_index->ts_cycles.timestamp_end); | |
1276 | ||
1277 | } | |
1278 | ||
1279 | /* | |
1280 | * On the first time we receive an index, the stream_id needs to | |
1281 | * be set for the stream in order to use it, we don't want any | |
1282 | * data at this stage. | |
1283 | */ | |
1284 | if (file_stream->parent.stream_id == -1ULL) { | |
1285 | /* | |
1286 | * Warning: with lttng-tools < 2.4.2, the beacon does not | |
1287 | * contain the real stream ID, it is memset to 0, so this | |
1288 | * might create a problem when a session has multiple | |
1289 | * channels. We can't detect it at this stage, lttng-tools | |
1290 | * has to be upgraded to fix this problem. | |
1291 | */ | |
1292 | printf_verbose("Assigning stream_id %" PRIu64 "\n", | |
1293 | stream_id); | |
1294 | file_stream->parent.stream_id = stream_id; | |
1295 | viewer_stream->ctf_stream_id = stream_id; | |
1296 | ||
4a744367 JD |
1297 | return; |
1298 | } | |
1299 | ||
f1f52630 MD |
1300 | pos->packet_size = cur_index->packet_size; |
1301 | pos->content_size = cur_index->content_size; | |
4a744367 | 1302 | pos->mmap_base_offset = 0; |
f1f52630 | 1303 | if (cur_index->offset == EOF) { |
4a744367 JD |
1304 | pos->offset = EOF; |
1305 | } else { | |
1306 | pos->offset = 0; | |
1307 | } | |
1308 | ||
f1f52630 | 1309 | if (cur_index->content_size == 0) { |
680ea180 | 1310 | /* Beacon packet index */ |
fb6b45aa JD |
1311 | if (file_stream->parent.stream_class) { |
1312 | file_stream->parent.cycles_timestamp = | |
f1f52630 | 1313 | cur_index->ts_cycles.timestamp_end; |
fb6b45aa JD |
1314 | file_stream->parent.real_timestamp = ctf_get_real_timestamp( |
1315 | &file_stream->parent, | |
1316 | cur_index->ts_cycles.timestamp_end); | |
680ea180 JD |
1317 | |
1318 | /* | |
1319 | * Duplicate the data from the previous index, because | |
1320 | * the one we just received is only a beacon with no | |
1321 | * relevant information except the timestamp_end. We | |
1322 | * don't need to keep this timestamp_end because we already | |
1323 | * updated the file_stream timestamps, so we only need | |
1324 | * to keep the last real index data as prev_index. That | |
1325 | * way, we keep the original prev timestamps and | |
1326 | * discarded events counter. This is the same behaviour | |
1327 | * as if we were reading a local trace, we would not | |
1328 | * have fake indexes between real indexes. | |
1329 | */ | |
1330 | memcpy(cur_index, prev_index, sizeof(struct packet_index)); | |
fb6b45aa | 1331 | } |
4a744367 | 1332 | } else { |
680ea180 | 1333 | /* Real packet index */ |
fb6b45aa JD |
1334 | if (file_stream->parent.stream_class) { |
1335 | /* Convert the timestamps and append to the real_index. */ | |
1336 | cur_index->ts_real.timestamp_begin = ctf_get_real_timestamp( | |
1337 | &file_stream->parent, | |
1338 | cur_index->ts_cycles.timestamp_begin); | |
1339 | cur_index->ts_real.timestamp_end = ctf_get_real_timestamp( | |
1340 | &file_stream->parent, | |
1341 | cur_index->ts_cycles.timestamp_end); | |
1342 | } | |
f1f52630 MD |
1343 | |
1344 | ctf_update_current_packet_index(&file_stream->parent, | |
1345 | prev_index, cur_index); | |
1346 | ||
ed093d0e MD |
1347 | /* |
1348 | * We need to check if we are in trace read or called | |
1349 | * from packet indexing. In this last case, the | |
1350 | * collection is not there, so we cannot print the | |
1351 | * timestamps. | |
1352 | */ | |
1353 | if ((&file_stream->parent)->stream_class->trace->parent.collection) { | |
1354 | ctf_print_discarded_lost(stderr, &file_stream->parent); | |
1355 | } | |
1356 | ||
f1f52630 MD |
1357 | file_stream->parent.cycles_timestamp = |
1358 | cur_index->ts_cycles.timestamp_begin; | |
1359 | file_stream->parent.real_timestamp = | |
1360 | cur_index->ts_real.timestamp_begin; | |
4a744367 JD |
1361 | } |
1362 | ||
2a4ae771 JG |
1363 | /* |
1364 | * Flush the output between attempts to grab a packet, thus | |
1365 | * ensuring we flush at least at the periodical timer period. | |
1366 | * This ensures the output remains reactive for interactive users and | |
1367 | * that the output is flushed when redirected to a file by the shell. | |
1368 | */ | |
1369 | if (fflush(LTTNG_LIVE_OUTPUT_FP) < 0) { | |
1370 | perror("fflush"); | |
1371 | goto end; | |
1372 | } | |
1373 | ||
4a744367 JD |
1374 | if (pos->packet_size == 0 || pos->offset == EOF) { |
1375 | goto end; | |
1376 | } | |
1377 | ||
1378 | printf_verbose("get_data_packet for stream %" PRIu64 "\n", | |
1379 | viewer_stream->id); | |
1380 | ret = get_data_packet(session->ctx, pos, viewer_stream, | |
c1e8ac81 | 1381 | cur_index->offset, |
f1f52630 | 1382 | cur_index->packet_size / CHAR_BIT); |
4a744367 JD |
1383 | if (ret == -2) { |
1384 | goto retry; | |
1385 | } else if (ret < 0) { | |
1386 | pos->offset = EOF; | |
e29395a8 JG |
1387 | if (!lttng_live_should_quit()) { |
1388 | fprintf(stderr, "[error] get_data_packet failed\n"); | |
1389 | } | |
4a744367 JD |
1390 | return; |
1391 | } | |
fb6b45aa | 1392 | viewer_stream->data_pending = 0; |
4a744367 | 1393 | |
fb6b45aa | 1394 | read_packet_header(pos, file_stream); |
4a744367 JD |
1395 | |
1396 | end: | |
1397 | return; | |
1398 | } | |
1399 | ||
2acdc547 JD |
1400 | int lttng_live_create_viewer_session(struct lttng_live_ctx *ctx) |
1401 | { | |
1402 | struct lttng_viewer_cmd cmd; | |
1403 | struct lttng_viewer_create_session_response resp; | |
1404 | int ret; | |
1405 | ssize_t ret_len; | |
1406 | ||
8ace20bf MD |
1407 | if (lttng_live_should_quit()) { |
1408 | ret = -1; | |
1409 | goto end; | |
1410 | } | |
1411 | ||
2acdc547 | 1412 | cmd.cmd = htobe32(LTTNG_VIEWER_CREATE_SESSION); |
259863bd | 1413 | cmd.data_size = htobe64((uint64_t) 0); |
e11a3d28 | 1414 | cmd.cmd_version = htobe32(0); |
2acdc547 | 1415 | |
b7e8a8e1 | 1416 | ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd)); |
2acdc547 | 1417 | if (ret_len < 0) { |
79620497 | 1418 | perror("[error] Error sending cmd"); |
2acdc547 JD |
1419 | goto error; |
1420 | } | |
1421 | assert(ret_len == sizeof(cmd)); | |
1422 | ||
b7e8a8e1 | 1423 | ret_len = lttng_live_recv(ctx->control_sock, &resp, sizeof(resp)); |
f8612f31 MD |
1424 | if (ret_len == 0) { |
1425 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
1426 | goto error; |
1427 | } | |
2acdc547 | 1428 | if (ret_len < 0) { |
79620497 | 1429 | perror("[error] Error receiving create session reply"); |
2acdc547 JD |
1430 | goto error; |
1431 | } | |
1432 | assert(ret_len == sizeof(resp)); | |
1433 | ||
1434 | if (be32toh(resp.status) != LTTNG_VIEWER_CREATE_SESSION_OK) { | |
1435 | fprintf(stderr, "[error] Error creating viewer session\n"); | |
2acdc547 JD |
1436 | goto error; |
1437 | } | |
1438 | ret = 0; | |
8ace20bf MD |
1439 | end: |
1440 | return ret; | |
2acdc547 JD |
1441 | |
1442 | error: | |
8ace20bf | 1443 | return -1; |
2acdc547 JD |
1444 | } |
1445 | ||
1446 | static | |
1447 | int del_traces(gpointer key, gpointer value, gpointer user_data) | |
4a744367 JD |
1448 | { |
1449 | struct bt_context *bt_ctx = user_data; | |
1450 | struct lttng_live_ctf_trace *trace = value; | |
1451 | int ret; | |
e88db11d | 1452 | struct lttng_live_viewer_stream *lvstream, *tmp; |
4a744367 | 1453 | |
e88db11d MD |
1454 | /* |
1455 | * We don't have ownership of the live viewer stream, just | |
1456 | * remove them from our list. | |
1457 | */ | |
1458 | bt_list_for_each_entry_safe(lvstream, tmp, &trace->stream_list, | |
1459 | trace_stream_node) { | |
1460 | lvstream->in_trace = 0; | |
1461 | bt_list_del(&lvstream->trace_stream_node); | |
1462 | } | |
1463 | if (trace->in_use) { | |
1464 | ret = bt_context_remove_trace(bt_ctx, trace->trace_id); | |
1465 | if (ret < 0) | |
1466 | fprintf(stderr, "[error] removing trace from context\n"); | |
1467 | } | |
4a744367 JD |
1468 | |
1469 | /* remove the key/value pair from the HT. */ | |
1470 | return 1; | |
1471 | } | |
1472 | ||
2acdc547 | 1473 | static |
7840bb08 JD |
1474 | int add_one_trace(struct lttng_live_ctx *ctx, |
1475 | struct lttng_live_ctf_trace *trace) | |
4a744367 | 1476 | { |
e88db11d | 1477 | int ret; |
7840bb08 | 1478 | struct bt_context *bt_ctx = ctx->bt_ctx; |
4a744367 JD |
1479 | struct lttng_live_viewer_stream *stream; |
1480 | struct bt_mmap_stream *new_mmap_stream; | |
1481 | struct bt_mmap_stream_list mmap_list; | |
150595c4 JD |
1482 | struct bt_trace_descriptor *td; |
1483 | struct bt_trace_handle *handle; | |
4a744367 | 1484 | |
917bba7f JD |
1485 | printf_verbose("Add one trace ctf_trace_id: %" PRIu64 |
1486 | " (metadata_stream: %p)\n", | |
1487 | trace->ctf_trace_id, trace->metadata_stream); | |
b5a1fa45 JD |
1488 | /* |
1489 | * We don't know how many streams we will receive for a trace, so | |
1490 | * once we are done receiving the traces, we add all the traces | |
1491 | * received to the bt_context. | |
1492 | * We can receive streams during the attach command or the | |
1493 | * get_new_streams, so we have to make sure not to add multiple | |
1494 | * times the same traces. | |
1495 | * If a trace is already in the context, we just skip this function. | |
1496 | */ | |
7840bb08 | 1497 | if (trace->in_use) { |
917bba7f | 1498 | printf_verbose("Trace already in use\n"); |
7840bb08 JD |
1499 | ret = 0; |
1500 | goto end; | |
1501 | } | |
2acdc547 | 1502 | |
4a744367 JD |
1503 | BT_INIT_LIST_HEAD(&mmap_list.head); |
1504 | ||
e88db11d | 1505 | bt_list_for_each_entry(stream, &trace->stream_list, trace_stream_node) { |
4a744367 JD |
1506 | if (!stream->metadata_flag) { |
1507 | new_mmap_stream = zmalloc(sizeof(struct bt_mmap_stream)); | |
1508 | new_mmap_stream->priv = (void *) stream; | |
1509 | new_mmap_stream->fd = -1; | |
1510 | bt_list_add(&new_mmap_stream->list, &mmap_list.head); | |
1511 | } else { | |
af701dc4 JD |
1512 | char *metadata_buf = NULL; |
1513 | ||
4a744367 | 1514 | /* Get all possible metadata before starting */ |
af701dc4 JD |
1515 | ret = get_new_metadata(ctx, stream, &metadata_buf); |
1516 | if (ret) { | |
1517 | free(metadata_buf); | |
1518 | goto end_free; | |
1519 | } | |
1520 | if (!stream->metadata_len) { | |
1521 | fprintf(stderr, "[error] empty metadata\n"); | |
1522 | ret = -1; | |
1523 | free(metadata_buf); | |
1524 | goto end_free; | |
1525 | } | |
1526 | ||
917bba7f | 1527 | printf_verbose("Metadata stream found\n"); |
af701dc4 JD |
1528 | trace->metadata_fp = babeltrace_fmemopen(metadata_buf, |
1529 | stream->metadata_len, "rb"); | |
1530 | if (!trace->metadata_fp) { | |
1531 | perror("Metadata fmemopen"); | |
1532 | ret = -1; | |
1533 | free(metadata_buf); | |
9abca178 | 1534 | goto end_free; |
af701dc4 | 1535 | } |
4a744367 JD |
1536 | } |
1537 | } | |
1538 | ||
1539 | if (!trace->metadata_fp) { | |
1540 | fprintf(stderr, "[error] No metadata stream opened\n"); | |
7840bb08 | 1541 | ret = -1; |
4a744367 JD |
1542 | goto end_free; |
1543 | } | |
1544 | ||
1545 | ret = bt_context_add_trace(bt_ctx, NULL, "ctf", | |
1546 | ctf_live_packet_seek, &mmap_list, trace->metadata_fp); | |
1547 | if (ret < 0) { | |
1548 | fprintf(stderr, "[error] Error adding trace\n"); | |
7840bb08 | 1549 | ret = -1; |
4a744367 JD |
1550 | goto end_free; |
1551 | } | |
af701dc4 JD |
1552 | trace->metadata_stream->metadata_len = 0; |
1553 | ||
150595c4 JD |
1554 | handle = (struct bt_trace_handle *) g_hash_table_lookup( |
1555 | bt_ctx->trace_handles, | |
1556 | (gpointer) (unsigned long) ret); | |
1557 | td = handle->td; | |
1558 | trace->handle = handle; | |
2acdc547 | 1559 | if (bt_ctx->current_iterator) { |
2acdc547 JD |
1560 | bt_iter_add_trace(bt_ctx->current_iterator, td); |
1561 | } | |
1562 | ||
4a744367 | 1563 | trace->trace_id = ret; |
2acdc547 | 1564 | trace->in_use = 1; |
917bba7f | 1565 | printf_verbose("Trace now in use, id = %d\n", trace->trace_id); |
4a744367 JD |
1566 | |
1567 | goto end; | |
1568 | ||
1569 | end_free: | |
1570 | bt_context_put(bt_ctx); | |
1571 | end: | |
7840bb08 JD |
1572 | return ret; |
1573 | } | |
1574 | ||
8817e492 JD |
1575 | /* |
1576 | * Make sure all the traces we know have a metadata stream or loop on | |
1577 | * ask_new_streams until it is done. This must be called before we call | |
1578 | * add_one_trace. | |
1579 | * | |
1580 | * Return 0 when all known traces have a metadata stream, a negative value | |
1581 | * on error. | |
1582 | */ | |
1583 | static | |
1584 | int check_traces_metadata(struct lttng_live_ctx *ctx) | |
1585 | { | |
1586 | int ret; | |
1587 | struct lttng_live_ctf_trace *trace; | |
1588 | GHashTableIter it; | |
1589 | gpointer key; | |
1590 | gpointer value; | |
1591 | ||
1592 | retry: | |
1593 | g_hash_table_iter_init(&it, ctx->session->ctf_traces); | |
1594 | while (g_hash_table_iter_next(&it, &key, &value)) { | |
1595 | trace = (struct lttng_live_ctf_trace *) value; | |
1596 | printf_verbose("Check trace %" PRIu64 " metadata\n", trace->ctf_trace_id); | |
1597 | while (!trace->metadata_stream) { | |
1598 | printf_verbose("Waiting for metadata stream\n"); | |
1599 | if (lttng_live_should_quit()) { | |
1600 | ret = 0; | |
1601 | goto end; | |
1602 | } | |
1603 | ret = ask_new_streams(ctx); | |
1604 | if (ret < 0) { | |
1605 | goto end; | |
1606 | } else if (ret == 0) { | |
1607 | (void) poll(NULL, 0, ACTIVE_POLL_DELAY); | |
1608 | } else { | |
1609 | /* | |
1610 | * If ask_new_stream got streams from a trace we did not know | |
1611 | * about until now, we have to reinitialize the iterator. | |
1612 | */ | |
1613 | goto retry; | |
1614 | } | |
1615 | } | |
1616 | } | |
1617 | ||
1618 | ret = 0; | |
1619 | ||
1620 | end: | |
1621 | printf_verbose("End check traces metadata\n"); | |
1622 | return ret; | |
1623 | } | |
1624 | ||
7840bb08 JD |
1625 | static |
1626 | int add_traces(struct lttng_live_ctx *ctx) | |
1627 | { | |
1628 | int ret; | |
1629 | struct lttng_live_ctf_trace *trace; | |
1630 | GHashTableIter it; | |
1631 | gpointer key; | |
1632 | gpointer value; | |
1633 | ||
917bba7f | 1634 | printf_verbose("Begin add traces\n"); |
8817e492 JD |
1635 | |
1636 | ret = check_traces_metadata(ctx); | |
1637 | if (ret < 0) { | |
1638 | goto end; | |
1639 | } | |
1640 | ||
7840bb08 JD |
1641 | g_hash_table_iter_init(&it, ctx->session->ctf_traces); |
1642 | while (g_hash_table_iter_next(&it, &key, &value)) { | |
1643 | trace = (struct lttng_live_ctf_trace *) value; | |
1644 | ret = add_one_trace(ctx, trace); | |
1645 | if (ret < 0) { | |
1646 | goto end; | |
1647 | } | |
1648 | } | |
1649 | ||
1650 | ret = 0; | |
1651 | ||
1652 | end: | |
917bba7f | 1653 | printf_verbose("End add traces\n"); |
7840bb08 | 1654 | return ret; |
4a744367 JD |
1655 | } |
1656 | ||
73b2b0d1 JD |
1657 | /* |
1658 | * Request new streams for a session. | |
1659 | * Returns the number of streams received or a negative value on error. | |
1660 | */ | |
2acdc547 | 1661 | int lttng_live_get_new_streams(struct lttng_live_ctx *ctx, uint64_t id) |
6192b988 JD |
1662 | { |
1663 | struct lttng_viewer_cmd cmd; | |
2acdc547 JD |
1664 | struct lttng_viewer_new_streams_request rq; |
1665 | struct lttng_viewer_new_streams_response rp; | |
1666 | struct lttng_viewer_stream stream; | |
73b2b0d1 | 1667 | int ret, i, nb_streams = 0; |
6192b988 | 1668 | ssize_t ret_len; |
b5a1fa45 | 1669 | uint32_t stream_count; |
de417d04 JR |
1670 | const size_t cmd_buf_len = sizeof(cmd) + sizeof(rq); |
1671 | char cmd_buf[cmd_buf_len]; | |
6192b988 | 1672 | |
8ace20bf MD |
1673 | if (lttng_live_should_quit()) { |
1674 | ret = -1; | |
1675 | goto end; | |
1676 | } | |
1677 | ||
2acdc547 | 1678 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_NEW_STREAMS); |
259863bd | 1679 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); |
e11a3d28 | 1680 | cmd.cmd_version = htobe32(0); |
6192b988 | 1681 | |
2acdc547 JD |
1682 | memset(&rq, 0, sizeof(rq)); |
1683 | rq.session_id = htobe64(id); | |
1684 | ||
de417d04 JR |
1685 | /* |
1686 | * Merge the cmd and connection request to prevent a write-write | |
1687 | * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the | |
1688 | * second write to be performed quickly in presence of Nagle's algorithm. | |
1689 | */ | |
1690 | memcpy(cmd_buf, &cmd, sizeof(cmd)); | |
1691 | memcpy(cmd_buf + sizeof(cmd), &rq, sizeof(rq)); | |
6192b988 | 1692 | |
de417d04 | 1693 | ret_len = lttng_live_send(ctx->control_sock, cmd_buf, cmd_buf_len); |
6192b988 | 1694 | if (ret_len < 0) { |
de417d04 | 1695 | perror("[error] Error sending get_new_streams cmd and request"); |
6192b988 JD |
1696 | goto error; |
1697 | } | |
de417d04 | 1698 | assert(ret_len == cmd_buf_len); |
6192b988 | 1699 | |
b7e8a8e1 | 1700 | ret_len = lttng_live_recv(ctx->control_sock, &rp, sizeof(rp)); |
f8612f31 MD |
1701 | if (ret_len == 0) { |
1702 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
1703 | goto error; |
1704 | } | |
2acdc547 | 1705 | if (ret_len < 0) { |
79620497 | 1706 | perror("[error] Error receiving get_new_streams response"); |
6192b988 JD |
1707 | goto error; |
1708 | } | |
2acdc547 JD |
1709 | assert(ret_len == sizeof(rp)); |
1710 | ||
1711 | switch(be32toh(rp.status)) { | |
1712 | case LTTNG_VIEWER_NEW_STREAMS_OK: | |
1713 | break; | |
1714 | case LTTNG_VIEWER_NEW_STREAMS_NO_NEW: | |
1715 | ret = 0; | |
1716 | goto end; | |
1717 | case LTTNG_VIEWER_NEW_STREAMS_HUP: | |
1718 | ret = -LTTNG_VIEWER_NEW_STREAMS_HUP; | |
1719 | goto end; | |
1720 | case LTTNG_VIEWER_NEW_STREAMS_ERR: | |
1721 | fprintf(stderr, "[error] get_new_streams error\n"); | |
8ace20bf | 1722 | goto error; |
2acdc547 JD |
1723 | default: |
1724 | fprintf(stderr, "[error] Unknown return code %u\n", | |
1725 | be32toh(rp.status)); | |
8ace20bf | 1726 | goto error; |
2acdc547 JD |
1727 | } |
1728 | ||
b5a1fa45 JD |
1729 | stream_count = be32toh(rp.streams_count); |
1730 | ctx->session->stream_count += stream_count; | |
2acdc547 JD |
1731 | /* |
1732 | * When the session is created but not started, we do an active wait | |
1733 | * until it starts. It allows the viewer to start processing the trace | |
1734 | * as soon as the session starts. | |
1735 | */ | |
1736 | if (ctx->session->stream_count == 0) { | |
1737 | ret = 0; | |
1738 | goto end; | |
1739 | } | |
b5e7994d MD |
1740 | printf_verbose("Waiting for %d streams:\n", stream_count); |
1741 | ||
b5a1fa45 | 1742 | for (i = 0; i < stream_count; i++) { |
b5e7994d MD |
1743 | struct lttng_live_viewer_stream *lvstream; |
1744 | ||
1745 | lvstream = g_new0(struct lttng_live_viewer_stream, 1); | |
1746 | ret_len = lttng_live_recv(ctx->control_sock, &stream, | |
1747 | sizeof(stream)); | |
f8612f31 MD |
1748 | if (ret_len == 0) { |
1749 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
b5e7994d | 1750 | g_free(lvstream); |
f8612f31 MD |
1751 | goto error; |
1752 | } | |
2acdc547 | 1753 | if (ret_len < 0) { |
79620497 | 1754 | perror("[error] Error receiving stream"); |
b5e7994d | 1755 | g_free(lvstream); |
2acdc547 JD |
1756 | goto error; |
1757 | } | |
1758 | assert(ret_len == sizeof(stream)); | |
1759 | stream.path_name[LTTNG_VIEWER_PATH_MAX - 1] = '\0'; | |
1760 | stream.channel_name[LTTNG_VIEWER_NAME_MAX - 1] = '\0'; | |
1761 | ||
1762 | printf_verbose(" stream %" PRIu64 " : %s/%s\n", | |
1763 | be64toh(stream.id), stream.path_name, | |
1764 | stream.channel_name); | |
b5e7994d MD |
1765 | lvstream->id = be64toh(stream.id); |
1766 | lvstream->session = ctx->session; | |
2acdc547 | 1767 | |
b5e7994d MD |
1768 | lvstream->mmap_size = 0; |
1769 | lvstream->ctf_stream_id = -1ULL; | |
2acdc547 JD |
1770 | |
1771 | if (be32toh(stream.metadata_flag)) { | |
b5e7994d | 1772 | lvstream->metadata_flag = 1; |
2acdc547 | 1773 | } |
b5e7994d | 1774 | ret = lttng_live_ctf_trace_assign(lvstream, |
2acdc547 JD |
1775 | be64toh(stream.ctf_trace_id)); |
1776 | if (ret < 0) { | |
b5e7994d | 1777 | g_free(lvstream); |
2acdc547 JD |
1778 | goto error; |
1779 | } | |
73b2b0d1 | 1780 | nb_streams++; |
e88db11d | 1781 | bt_list_add(&lvstream->session_stream_node, |
b5e7994d | 1782 | &ctx->session->stream_list); |
2acdc547 | 1783 | } |
73b2b0d1 | 1784 | ret = nb_streams; |
2acdc547 | 1785 | end: |
6192b988 | 1786 | return ret; |
8ace20bf MD |
1787 | |
1788 | error: | |
1789 | return -1; | |
6192b988 JD |
1790 | } |
1791 | ||
28756729 | 1792 | int lttng_live_read(struct lttng_live_ctx *ctx) |
4a744367 | 1793 | { |
28756729 JG |
1794 | int ret = -1; |
1795 | int i; | |
4a744367 JD |
1796 | struct bt_ctf_iter *iter; |
1797 | const struct bt_ctf_event *event; | |
1798 | struct bt_iter_pos begin_pos; | |
1799 | struct bt_trace_descriptor *td_write; | |
1800 | struct bt_format *fmt_write; | |
1801 | struct ctf_text_stream_pos *sout; | |
2acdc547 | 1802 | uint64_t id; |
4a744367 | 1803 | |
2acdc547 JD |
1804 | ctx->bt_ctx = bt_context_create(); |
1805 | if (!ctx->bt_ctx) { | |
4a744367 JD |
1806 | fprintf(stderr, "[error] bt_context_create allocation\n"); |
1807 | goto end; | |
1808 | } | |
1809 | ||
1810 | fmt_write = bt_lookup_format(g_quark_from_static_string("text")); | |
1811 | if (!fmt_write) { | |
1812 | fprintf(stderr, "[error] ctf-text error\n"); | |
e88db11d | 1813 | goto end_free; |
4a744367 JD |
1814 | } |
1815 | ||
1816 | td_write = fmt_write->open_trace(NULL, O_RDWR, NULL, NULL); | |
1817 | if (!td_write) { | |
1818 | fprintf(stderr, "[error] Error opening output trace\n"); | |
1819 | goto end_free; | |
1820 | } | |
1821 | ||
1822 | sout = container_of(td_write, struct ctf_text_stream_pos, | |
1823 | trace_descriptor); | |
85bb4663 | 1824 | if (!sout->parent.event_cb) { |
4a744367 | 1825 | goto end_free; |
85bb4663 | 1826 | } |
4a744367 | 1827 | |
6192b988 JD |
1828 | ret = lttng_live_create_viewer_session(ctx); |
1829 | if (ret < 0) { | |
1830 | goto end_free; | |
1831 | } | |
1832 | ||
2acdc547 JD |
1833 | for (i = 0; i < ctx->session_ids->len; i++) { |
1834 | id = g_array_index(ctx->session_ids, uint64_t, i); | |
7e5e4176 | 1835 | printf_verbose("Attaching to session %" PRIu64 "\n", id); |
2acdc547 JD |
1836 | ret = lttng_live_attach_session(ctx, id); |
1837 | printf_verbose("Attaching session returns %d\n", ret); | |
1838 | if (ret < 0) { | |
1839 | if (ret == -LTTNG_VIEWER_ATTACH_UNK) { | |
1840 | fprintf(stderr, "[error] Unknown session ID\n"); | |
1841 | } | |
1842 | goto end_free; | |
1843 | } | |
1844 | } | |
1845 | ||
4a744367 | 1846 | /* |
2acdc547 | 1847 | * As long as the session is active, we try to get new streams. |
4a744367 | 1848 | */ |
2acdc547 | 1849 | for (;;) { |
4a744367 JD |
1850 | int flags; |
1851 | ||
8ace20bf | 1852 | if (lttng_live_should_quit()) { |
28756729 | 1853 | ret = 0; |
8ace20bf MD |
1854 | goto end_free; |
1855 | } | |
1856 | ||
2acdc547 | 1857 | while (!ctx->session->stream_count) { |
8ace20bf MD |
1858 | if (lttng_live_should_quit() |
1859 | || ctx->session_ids->len == 0) { | |
28756729 | 1860 | ret = 0; |
4a744367 | 1861 | goto end_free; |
85bb4663 | 1862 | } |
2acdc547 | 1863 | ret = ask_new_streams(ctx); |
85bb4663 | 1864 | if (ret < 0) { |
09aa42aa | 1865 | ret = 0; |
2acdc547 | 1866 | goto end_free; |
85bb4663 MD |
1867 | } |
1868 | if (!ctx->session->stream_count) { | |
85e2085e | 1869 | (void) poll(NULL, 0, ACTIVE_POLL_DELAY); |
85bb4663 | 1870 | } |
2acdc547 | 1871 | } |
4a744367 | 1872 | |
7840bb08 JD |
1873 | ret = add_traces(ctx); |
1874 | if (ret < 0) { | |
1875 | goto end_free; | |
1876 | } | |
4a744367 JD |
1877 | |
1878 | begin_pos.type = BT_SEEK_BEGIN; | |
2acdc547 | 1879 | iter = bt_ctf_iter_create(ctx->bt_ctx, &begin_pos, NULL); |
4a744367 | 1880 | if (!iter) { |
e29395a8 JG |
1881 | if (lttng_live_should_quit()) { |
1882 | ret = 0; | |
e88db11d | 1883 | goto end_free; |
e29395a8 | 1884 | } |
4a744367 | 1885 | fprintf(stderr, "[error] Iterator creation error\n"); |
e88db11d | 1886 | goto end_free; |
4a744367 JD |
1887 | } |
1888 | for (;;) { | |
8ace20bf | 1889 | if (lttng_live_should_quit()) { |
28756729 | 1890 | ret = 0; |
8ace20bf MD |
1891 | goto end_free; |
1892 | } | |
4a744367 JD |
1893 | event = bt_ctf_iter_read_event_flags(iter, &flags); |
1894 | if (!(flags & BT_ITER_FLAG_RETRY)) { | |
1895 | if (!event) { | |
1896 | /* End of trace */ | |
1897 | break; | |
1898 | } | |
1899 | ret = sout->parent.event_cb(&sout->parent, | |
1900 | event->parent->stream); | |
1901 | if (ret) { | |
1902 | fprintf(stderr, "[error] Writing " | |
1903 | "event failed.\n"); | |
1904 | goto end_free; | |
1905 | } | |
1906 | } | |
1907 | ret = bt_iter_next(bt_ctf_get_iter(iter)); | |
1908 | if (ret < 0) { | |
1909 | goto end_free; | |
1910 | } | |
1911 | } | |
1912 | bt_ctf_iter_destroy(iter); | |
2acdc547 JD |
1913 | g_hash_table_foreach_remove(ctx->session->ctf_traces, |
1914 | del_traces, ctx->bt_ctx); | |
1915 | ctx->session->stream_count = 0; | |
1916 | } | |
4a744367 JD |
1917 | |
1918 | end_free: | |
e88db11d MD |
1919 | g_hash_table_foreach_remove(ctx->session->ctf_traces, |
1920 | del_traces, ctx->bt_ctx); | |
2acdc547 | 1921 | bt_context_put(ctx->bt_ctx); |
4a744367 | 1922 | end: |
e29395a8 JG |
1923 | if (lttng_live_should_quit()) { |
1924 | ret = 0; | |
1925 | } | |
28756729 | 1926 | return ret; |
4a744367 | 1927 | } |