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; | |
b727abf5 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 | ||
b727abf5 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 | |
b727abf5 | 187 | ret_len = lttng_live_send(ctx->control_sock, cmd_buf, cmd_buf_len); |
4a744367 | 188 | if (ret_len < 0) { |
b727abf5 | 189 | perror("[error] Error sending cmd for establishing session"); |
4a744367 JD |
190 | goto error; |
191 | } | |
b727abf5 | 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; |
bb35f032 | 393 | BT_INIT_LIST_HEAD(&trace->stream_list); |
4a744367 | 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 | ||
bb35f032 MD |
401 | assert(!stream->in_trace); |
402 | stream->in_trace = 1; | |
4a744367 | 403 | stream->ctf_trace = trace; |
bb35f032 | 404 | bt_list_add(&stream->trace_stream_node, &trace->stream_list); |
4a744367 | 405 | |
4a744367 JD |
406 | return ret; |
407 | } | |
408 | ||
af701dc4 JD |
409 | static |
410 | int open_metadata_fp_write(struct lttng_live_viewer_stream *stream, | |
411 | char **metadata_buf, size_t *size) | |
412 | { | |
413 | int ret = 0; | |
414 | ||
415 | stream->metadata_fp_write = | |
416 | babeltrace_open_memstream(metadata_buf, size); | |
417 | if (!stream->metadata_fp_write) { | |
418 | perror("Metadata open_memstream"); | |
419 | ret = -1; | |
420 | } | |
421 | ||
422 | return ret; | |
423 | } | |
424 | ||
4a744367 JD |
425 | int lttng_live_attach_session(struct lttng_live_ctx *ctx, uint64_t id) |
426 | { | |
427 | struct lttng_viewer_cmd cmd; | |
428 | struct lttng_viewer_attach_session_request rq; | |
429 | struct lttng_viewer_attach_session_response rp; | |
430 | struct lttng_viewer_stream stream; | |
b727abf5 JR |
431 | const size_t cmd_buf_len = sizeof(cmd) + sizeof(rq); |
432 | char cmd_buf[cmd_buf_len]; | |
4a744367 JD |
433 | int ret, i; |
434 | ssize_t ret_len; | |
435 | ||
8ace20bf MD |
436 | if (lttng_live_should_quit()) { |
437 | ret = -1; | |
438 | goto end; | |
439 | } | |
440 | ||
4a744367 | 441 | cmd.cmd = htobe32(LTTNG_VIEWER_ATTACH_SESSION); |
259863bd | 442 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); |
e11a3d28 | 443 | cmd.cmd_version = htobe32(0); |
4a744367 JD |
444 | |
445 | memset(&rq, 0, sizeof(rq)); | |
446 | rq.session_id = htobe64(id); | |
447 | // TODO: add cmd line parameter to select seek beginning | |
448 | // rq.seek = htobe32(LTTNG_VIEWER_SEEK_BEGINNING); | |
449 | rq.seek = htobe32(LTTNG_VIEWER_SEEK_LAST); | |
450 | ||
b727abf5 JR |
451 | /* |
452 | * Merge the cmd and connection request to prevent a write-write | |
453 | * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the | |
454 | * second write to be performed quickly in presence of Nagle's algorithm. | |
455 | */ | |
456 | memcpy(cmd_buf, &cmd, sizeof(cmd)); | |
457 | memcpy(cmd_buf + sizeof(cmd), &rq, sizeof(rq)); | |
4a744367 | 458 | |
b727abf5 | 459 | ret_len = lttng_live_send(ctx->control_sock, cmd_buf, cmd_buf_len); |
4a744367 | 460 | if (ret_len < 0) { |
b727abf5 | 461 | perror("[error] Error sending attach command and request"); |
4a744367 JD |
462 | goto error; |
463 | } | |
b727abf5 | 464 | assert(ret_len == cmd_buf_len); |
4a744367 | 465 | |
b7e8a8e1 | 466 | ret_len = lttng_live_recv(ctx->control_sock, &rp, sizeof(rp)); |
f8612f31 MD |
467 | if (ret_len == 0) { |
468 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
469 | goto error; |
470 | } | |
4a744367 | 471 | if (ret_len < 0) { |
79620497 | 472 | perror("[error] Error receiving attach response"); |
4a744367 JD |
473 | goto error; |
474 | } | |
475 | assert(ret_len == sizeof(rp)); | |
476 | ||
477 | switch(be32toh(rp.status)) { | |
478 | case LTTNG_VIEWER_ATTACH_OK: | |
479 | break; | |
480 | case LTTNG_VIEWER_ATTACH_UNK: | |
481 | ret = -LTTNG_VIEWER_ATTACH_UNK; | |
482 | goto end; | |
483 | case LTTNG_VIEWER_ATTACH_ALREADY: | |
79620497 | 484 | fprintf(stderr, "[error] There is already a viewer attached to this session\n"); |
8ace20bf | 485 | goto error; |
4a744367 JD |
486 | case LTTNG_VIEWER_ATTACH_NOT_LIVE: |
487 | fprintf(stderr, "[error] Not a live session\n"); | |
8ace20bf | 488 | goto error; |
4a744367 JD |
489 | case LTTNG_VIEWER_ATTACH_SEEK_ERR: |
490 | fprintf(stderr, "[error] Wrong seek parameter\n"); | |
8ace20bf | 491 | goto error; |
4a744367 JD |
492 | default: |
493 | fprintf(stderr, "[error] Unknown attach return code %u\n", | |
494 | be32toh(rp.status)); | |
8ace20bf | 495 | goto error; |
4a744367 JD |
496 | } |
497 | if (be32toh(rp.status) != LTTNG_VIEWER_ATTACH_OK) { | |
8ace20bf | 498 | goto error; |
4a744367 JD |
499 | } |
500 | ||
2acdc547 | 501 | ctx->session->stream_count += be32toh(rp.streams_count); |
4a744367 JD |
502 | /* |
503 | * When the session is created but not started, we do an active wait | |
504 | * until it starts. It allows the viewer to start processing the trace | |
505 | * as soon as the session starts. | |
506 | */ | |
507 | if (ctx->session->stream_count == 0) { | |
508 | ret = 0; | |
509 | goto end; | |
510 | } | |
21fe3eb3 MD |
511 | printf_verbose("Waiting for %d streams:\n", |
512 | be32toh(rp.streams_count)); | |
4a744367 | 513 | for (i = 0; i < be32toh(rp.streams_count); i++) { |
21fe3eb3 MD |
514 | struct lttng_live_viewer_stream *lvstream; |
515 | ||
516 | lvstream = g_new0(struct lttng_live_viewer_stream, 1); | |
517 | ret_len = lttng_live_recv(ctx->control_sock, &stream, | |
518 | sizeof(stream)); | |
f8612f31 MD |
519 | if (ret_len == 0) { |
520 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
21fe3eb3 | 521 | g_free(lvstream); |
f8612f31 MD |
522 | goto error; |
523 | } | |
4a744367 | 524 | if (ret_len < 0) { |
79620497 | 525 | perror("[error] Error receiving stream"); |
21fe3eb3 | 526 | g_free(lvstream); |
4a744367 JD |
527 | goto error; |
528 | } | |
529 | assert(ret_len == sizeof(stream)); | |
9ed31e53 MD |
530 | stream.path_name[LTTNG_VIEWER_PATH_MAX - 1] = '\0'; |
531 | stream.channel_name[LTTNG_VIEWER_NAME_MAX - 1] = '\0'; | |
4a744367 JD |
532 | |
533 | printf_verbose(" stream %" PRIu64 " : %s/%s\n", | |
534 | be64toh(stream.id), stream.path_name, | |
535 | stream.channel_name); | |
21fe3eb3 MD |
536 | lvstream->id = be64toh(stream.id); |
537 | lvstream->session = ctx->session; | |
4a744367 | 538 | |
21fe3eb3 MD |
539 | lvstream->mmap_size = 0; |
540 | lvstream->ctf_stream_id = -1ULL; | |
4a744367 JD |
541 | |
542 | if (be32toh(stream.metadata_flag)) { | |
21fe3eb3 | 543 | lvstream->metadata_flag = 1; |
4a744367 | 544 | } |
21fe3eb3 | 545 | ret = lttng_live_ctf_trace_assign(lvstream, |
4a744367 JD |
546 | be64toh(stream.ctf_trace_id)); |
547 | if (ret < 0) { | |
21fe3eb3 | 548 | g_free(lvstream); |
4a744367 JD |
549 | goto error; |
550 | } | |
bb35f032 | 551 | bt_list_add(&lvstream->session_stream_node, |
21fe3eb3 | 552 | &ctx->session->stream_list); |
4a744367 JD |
553 | } |
554 | ret = 0; | |
4a744367 | 555 | end: |
4a744367 | 556 | return ret; |
8ace20bf MD |
557 | |
558 | error: | |
559 | return -1; | |
4a744367 JD |
560 | } |
561 | ||
73b2b0d1 JD |
562 | /* |
563 | * Ask the relay for new streams. | |
564 | * | |
565 | * Returns the number of new streams received or a negative value on error. | |
566 | */ | |
2acdc547 JD |
567 | static |
568 | int ask_new_streams(struct lttng_live_ctx *ctx) | |
569 | { | |
73b2b0d1 | 570 | int i, ret = 0, nb_streams = 0; |
2acdc547 JD |
571 | uint64_t id; |
572 | ||
573 | restart: | |
574 | for (i = 0; i < ctx->session_ids->len; i++) { | |
575 | id = g_array_index(ctx->session_ids, uint64_t, i); | |
576 | ret = lttng_live_get_new_streams(ctx, id); | |
73b2b0d1 | 577 | printf_verbose("Asking for new streams returns %d\n", ret); |
6baf4b8e MD |
578 | if (lttng_live_should_quit()) { |
579 | ret = -1; | |
580 | goto end; | |
581 | } | |
2acdc547 JD |
582 | if (ret < 0) { |
583 | if (ret == -LTTNG_VIEWER_NEW_STREAMS_HUP) { | |
584 | printf_verbose("Session %" PRIu64 " closed\n", | |
585 | id); | |
b5a1fa45 JD |
586 | /* |
587 | * The streams have already been closed during | |
588 | * the reading, so we only need to get rid of | |
589 | * the trace in our internal table of sessions. | |
590 | */ | |
2acdc547 JD |
591 | g_array_remove_index(ctx->session_ids, i); |
592 | /* | |
593 | * We can't continue iterating on the g_array | |
594 | * after a remove, we have to start again. | |
595 | */ | |
596 | goto restart; | |
597 | } else { | |
598 | ret = -1; | |
599 | goto end; | |
600 | } | |
73b2b0d1 JD |
601 | } else { |
602 | nb_streams += ret; | |
2acdc547 JD |
603 | } |
604 | } | |
4e58c7d3 MD |
605 | if (ctx->session_ids->len == 0) { |
606 | /* All sessions are closed. */ | |
607 | ret = -1; | |
608 | } else { | |
609 | ret = nb_streams; | |
610 | } | |
2acdc547 JD |
611 | |
612 | end: | |
613 | return ret; | |
614 | } | |
615 | ||
50d207af JD |
616 | static |
617 | int append_metadata(struct lttng_live_ctx *ctx, | |
618 | struct lttng_live_viewer_stream *viewer_stream) | |
619 | { | |
620 | int ret; | |
621 | struct lttng_live_viewer_stream *metadata; | |
622 | char *metadata_buf = NULL; | |
623 | ||
b93293f6 MD |
624 | if (!viewer_stream->ctf_trace->handle) { |
625 | printf_verbose("append_metadata: trace handle not ready yet.\n"); | |
626 | return 0; | |
627 | } | |
628 | ||
50d207af JD |
629 | printf_verbose("get_next_index: new metadata needed\n"); |
630 | ret = get_new_metadata(ctx, viewer_stream, &metadata_buf); | |
631 | if (ret < 0) { | |
632 | free(metadata_buf); | |
633 | goto error; | |
634 | } | |
635 | ||
636 | metadata = viewer_stream->ctf_trace->metadata_stream; | |
637 | metadata->ctf_trace->metadata_fp = | |
638 | babeltrace_fmemopen(metadata_buf, | |
639 | metadata->metadata_len, "rb"); | |
640 | if (!metadata->ctf_trace->metadata_fp) { | |
641 | perror("Metadata fmemopen"); | |
642 | free(metadata_buf); | |
643 | ret = -1; | |
644 | goto error; | |
645 | } | |
646 | ret = ctf_append_trace_metadata( | |
647 | viewer_stream->ctf_trace->handle->td, | |
648 | metadata->ctf_trace->metadata_fp); | |
251fc08c MD |
649 | /* We accept empty metadata packets */ |
650 | if (ret != 0 && ret != -ENOENT) { | |
50d207af JD |
651 | fprintf(stderr, "[error] Appending metadata\n"); |
652 | goto error; | |
653 | } | |
251fc08c | 654 | ret = 0; |
50d207af JD |
655 | |
656 | error: | |
657 | return ret; | |
658 | } | |
659 | ||
4a744367 JD |
660 | static |
661 | int get_data_packet(struct lttng_live_ctx *ctx, | |
662 | struct ctf_stream_pos *pos, | |
663 | struct lttng_live_viewer_stream *stream, uint64_t offset, | |
664 | uint64_t len) | |
665 | { | |
666 | struct lttng_viewer_cmd cmd; | |
667 | struct lttng_viewer_get_packet rq; | |
668 | struct lttng_viewer_trace_packet rp; | |
b727abf5 JR |
669 | const size_t cmd_buf_len = sizeof(cmd) + sizeof(rq); |
670 | char cmd_buf[cmd_buf_len]; | |
4a744367 JD |
671 | ssize_t ret_len; |
672 | int ret; | |
673 | ||
50d207af | 674 | retry: |
8ace20bf MD |
675 | if (lttng_live_should_quit()) { |
676 | ret = -1; | |
677 | goto end; | |
678 | } | |
857eaa68 | 679 | |
4a744367 | 680 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_PACKET); |
259863bd | 681 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); |
e11a3d28 | 682 | cmd.cmd_version = htobe32(0); |
4a744367 JD |
683 | |
684 | memset(&rq, 0, sizeof(rq)); | |
685 | rq.stream_id = htobe64(stream->id); | |
c1e8ac81 | 686 | rq.offset = htobe64(offset); |
4a744367 JD |
687 | rq.len = htobe32(len); |
688 | ||
b727abf5 JR |
689 | /* |
690 | * Merge the cmd and connection request to prevent a write-write | |
691 | * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the | |
692 | * second write to be performed quickly in presence of Nagle's algorithm. | |
693 | */ | |
694 | memcpy(cmd_buf, &cmd, sizeof(cmd)); | |
695 | memcpy(cmd_buf + sizeof(cmd), &rq, sizeof(rq)); | |
4a744367 | 696 | |
b727abf5 | 697 | ret_len = lttng_live_send(ctx->control_sock, cmd_buf, cmd_buf_len); |
4a744367 | 698 | if (ret_len < 0) { |
b727abf5 | 699 | perror("[error] Error sending get_data_packet cmd and request"); |
4a744367 JD |
700 | goto error; |
701 | } | |
b727abf5 | 702 | assert(ret_len == cmd_buf_len); |
4a744367 | 703 | |
b7e8a8e1 | 704 | ret_len = lttng_live_recv(ctx->control_sock, &rp, sizeof(rp)); |
f8612f31 MD |
705 | if (ret_len == 0) { |
706 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
707 | goto error; |
708 | } | |
4a744367 | 709 | if (ret_len < 0) { |
79620497 | 710 | perror("[error] Error receiving data response"); |
4a744367 JD |
711 | goto error; |
712 | } | |
57b9d843 | 713 | if (ret_len != sizeof(rp)) { |
7e5e4176 MD |
714 | fprintf(stderr, "[error] get_data_packet: expected %zu" |
715 | ", received %zd\n", sizeof(rp), | |
a5e4b11e | 716 | ret_len); |
57b9d843 JD |
717 | goto error; |
718 | } | |
4a744367 JD |
719 | |
720 | rp.flags = be32toh(rp.flags); | |
721 | ||
722 | switch (be32toh(rp.status)) { | |
723 | case LTTNG_VIEWER_GET_PACKET_OK: | |
724 | len = be32toh(rp.len); | |
725 | printf_verbose("get_data_packet: Ok, packet size : %" PRIu64 | |
726 | "\n", len); | |
727 | break; | |
728 | case LTTNG_VIEWER_GET_PACKET_RETRY: | |
8ace20bf | 729 | /* Unimplemented by relay daemon */ |
4a744367 | 730 | printf_verbose("get_data_packet: retry\n"); |
8ace20bf | 731 | goto error; |
4a744367 JD |
732 | case LTTNG_VIEWER_GET_PACKET_ERR: |
733 | if (rp.flags & LTTNG_VIEWER_FLAG_NEW_METADATA) { | |
734 | printf_verbose("get_data_packet: new metadata needed\n"); | |
50d207af JD |
735 | ret = append_metadata(ctx, stream); |
736 | if (ret) | |
737 | goto error; | |
4a744367 | 738 | } |
2acdc547 | 739 | if (rp.flags & LTTNG_VIEWER_FLAG_NEW_STREAM) { |
f312b3aa | 740 | printf_verbose("get_data_packet: new streams needed\n"); |
2acdc547 | 741 | ret = ask_new_streams(ctx); |
7840bb08 | 742 | if (ret < 0) { |
2acdc547 | 743 | goto error; |
7840bb08 JD |
744 | } else if (ret > 0) { |
745 | ret = add_traces(ctx); | |
746 | if (ret < 0) { | |
747 | goto error; | |
748 | } | |
749 | } | |
2acdc547 | 750 | } |
f312b3aa MD |
751 | if (rp.flags & (LTTNG_VIEWER_FLAG_NEW_METADATA |
752 | | LTTNG_VIEWER_FLAG_NEW_STREAM)) { | |
753 | goto retry; | |
754 | } | |
4a744367 | 755 | fprintf(stderr, "[error] get_data_packet: error\n"); |
8ace20bf | 756 | goto error; |
4a744367 JD |
757 | case LTTNG_VIEWER_GET_PACKET_EOF: |
758 | ret = -2; | |
8ace20bf | 759 | goto end; |
4a744367 JD |
760 | default: |
761 | printf_verbose("get_data_packet: unknown\n"); | |
8ace20bf | 762 | goto error; |
4a744367 JD |
763 | } |
764 | ||
65ae9a82 | 765 | if (len == 0) { |
96943040 | 766 | goto error; |
4a744367 JD |
767 | } |
768 | ||
769 | if (len > stream->mmap_size) { | |
770 | uint64_t new_size; | |
771 | ||
772 | new_size = max_t(uint64_t, len, stream->mmap_size << 1); | |
773 | if (pos->base_mma) { | |
774 | /* unmap old base */ | |
775 | ret = munmap_align(pos->base_mma); | |
776 | if (ret) { | |
79620497 | 777 | perror("[error] Unable to unmap old base"); |
4a744367 JD |
778 | goto error; |
779 | } | |
780 | pos->base_mma = NULL; | |
781 | } | |
782 | pos->base_mma = mmap_align(new_size, | |
783 | PROT_READ | PROT_WRITE, | |
784 | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); | |
785 | if (pos->base_mma == MAP_FAILED) { | |
79620497 | 786 | perror("[error] mmap error"); |
4a744367 | 787 | pos->base_mma = NULL; |
4a744367 JD |
788 | goto error; |
789 | } | |
790 | ||
791 | stream->mmap_size = new_size; | |
792 | printf_verbose("Expanding stream mmap size to %" PRIu64 " bytes\n", | |
793 | stream->mmap_size); | |
794 | } | |
795 | ||
b7e8a8e1 MD |
796 | ret_len = lttng_live_recv(ctx->control_sock, |
797 | mmap_align_addr(pos->base_mma), len); | |
f8612f31 MD |
798 | if (ret_len == 0) { |
799 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
800 | goto error; |
801 | } | |
4a744367 | 802 | if (ret_len < 0) { |
79620497 | 803 | perror("[error] Error receiving trace packet"); |
4a744367 JD |
804 | goto error; |
805 | } | |
806 | assert(ret_len == len); | |
f312b3aa | 807 | ret = 0; |
4a744367 | 808 | end: |
4a744367 | 809 | return ret; |
8ace20bf MD |
810 | |
811 | error: | |
812 | return -1; | |
4a744367 JD |
813 | } |
814 | ||
4a744367 | 815 | static |
9abca178 JD |
816 | int get_one_metadata_packet(struct lttng_live_ctx *ctx, |
817 | struct lttng_live_viewer_stream *metadata_stream) | |
4a744367 JD |
818 | { |
819 | uint64_t len = 0; | |
820 | int ret; | |
821 | struct lttng_viewer_cmd cmd; | |
822 | struct lttng_viewer_get_metadata rq; | |
823 | struct lttng_viewer_metadata_packet rp; | |
4a744367 JD |
824 | char *data = NULL; |
825 | ssize_t ret_len; | |
b727abf5 JR |
826 | const size_t cmd_buf_len = sizeof(cmd) + sizeof(rq); |
827 | char cmd_buf[cmd_buf_len]; | |
4a744367 | 828 | |
8ace20bf MD |
829 | if (lttng_live_should_quit()) { |
830 | ret = -1; | |
831 | goto end; | |
832 | } | |
833 | ||
9abca178 | 834 | rq.stream_id = htobe64(metadata_stream->id); |
4a744367 | 835 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_METADATA); |
259863bd | 836 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); |
e11a3d28 | 837 | cmd.cmd_version = htobe32(0); |
4a744367 | 838 | |
b727abf5 JR |
839 | /* |
840 | * Merge the cmd and connection request to prevent a write-write | |
841 | * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the | |
842 | * second write to be performed quickly in presence of Nagle's algorithm. | |
843 | */ | |
844 | memcpy(cmd_buf, &cmd, sizeof(cmd)); | |
845 | memcpy(cmd_buf + sizeof(cmd), &rq, sizeof(rq)); | |
4a744367 | 846 | |
b727abf5 | 847 | ret_len = lttng_live_send(ctx->control_sock, cmd_buf, cmd_buf_len); |
4a744367 | 848 | if (ret_len < 0) { |
b727abf5 | 849 | perror("[error] Error sending get_metadata cmd and request"); |
4a744367 JD |
850 | goto error; |
851 | } | |
b727abf5 | 852 | assert(ret_len == cmd_buf_len); |
4a744367 | 853 | |
b7e8a8e1 | 854 | ret_len = lttng_live_recv(ctx->control_sock, &rp, sizeof(rp)); |
f8612f31 MD |
855 | if (ret_len == 0) { |
856 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
857 | goto error; |
858 | } | |
4a744367 | 859 | if (ret_len < 0) { |
79620497 | 860 | perror("[error] Error receiving metadata response"); |
4a744367 JD |
861 | goto error; |
862 | } | |
863 | assert(ret_len == sizeof(rp)); | |
864 | ||
865 | switch (be32toh(rp.status)) { | |
866 | case LTTNG_VIEWER_METADATA_OK: | |
867 | printf_verbose("get_metadata : OK\n"); | |
868 | break; | |
869 | case LTTNG_VIEWER_NO_NEW_METADATA: | |
870 | printf_verbose("get_metadata : NO NEW\n"); | |
9abca178 | 871 | ret = 0; |
4a744367 JD |
872 | goto end; |
873 | case LTTNG_VIEWER_METADATA_ERR: | |
874 | printf_verbose("get_metadata : ERR\n"); | |
8ace20bf | 875 | goto error; |
4a744367 JD |
876 | default: |
877 | printf_verbose("get_metadata : UNKNOWN\n"); | |
8ace20bf | 878 | goto error; |
4a744367 JD |
879 | } |
880 | ||
881 | len = be64toh(rp.len); | |
882 | printf_verbose("Writing %" PRIu64" bytes to metadata\n", len); | |
883 | if (len <= 0) { | |
8ace20bf | 884 | goto error; |
4a744367 JD |
885 | } |
886 | ||
887 | data = zmalloc(len); | |
888 | if (!data) { | |
889 | perror("relay data zmalloc"); | |
4a744367 JD |
890 | goto error; |
891 | } | |
b7e8a8e1 | 892 | ret_len = lttng_live_recv(ctx->control_sock, data, len); |
f8612f31 MD |
893 | if (ret_len == 0) { |
894 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
8ace20bf | 895 | goto error_free_data; |
f8612f31 | 896 | } |
4a744367 | 897 | if (ret_len < 0) { |
79620497 | 898 | perror("[error] Error receiving trace packet"); |
8ace20bf | 899 | goto error_free_data; |
4a744367 JD |
900 | } |
901 | assert(ret_len == len); | |
902 | ||
903 | do { | |
af701dc4 JD |
904 | ret_len = fwrite(data, 1, len, |
905 | metadata_stream->metadata_fp_write); | |
4a744367 JD |
906 | } while (ret_len < 0 && errno == EINTR); |
907 | if (ret_len < 0) { | |
af701dc4 | 908 | fprintf(stderr, "[error] Writing in the metadata fp\n"); |
8ace20bf | 909 | goto error_free_data; |
4a744367 JD |
910 | } |
911 | assert(ret_len == len); | |
af701dc4 | 912 | metadata_stream->metadata_len += len; |
8ace20bf | 913 | free(data); |
9abca178 | 914 | ret = len; |
8ace20bf MD |
915 | end: |
916 | return ret; | |
4a744367 | 917 | |
8ace20bf | 918 | error_free_data: |
4a744367 | 919 | free(data); |
4a744367 | 920 | error: |
8ace20bf | 921 | return -1; |
4a744367 JD |
922 | } |
923 | ||
9abca178 JD |
924 | /* |
925 | * Return 0 on success, a negative value on error. | |
926 | */ | |
927 | static | |
928 | int get_new_metadata(struct lttng_live_ctx *ctx, | |
af701dc4 JD |
929 | struct lttng_live_viewer_stream *viewer_stream, |
930 | char **metadata_buf) | |
9abca178 JD |
931 | { |
932 | int ret = 0; | |
933 | struct lttng_live_viewer_stream *metadata_stream; | |
73b2b0d1 | 934 | size_t size, len_read = 0; |
9abca178 JD |
935 | |
936 | metadata_stream = viewer_stream->ctf_trace->metadata_stream; | |
50d207af JD |
937 | if (!metadata_stream) { |
938 | fprintf(stderr, "[error] No metadata stream\n"); | |
939 | ret = -1; | |
940 | goto error; | |
941 | } | |
af701dc4 JD |
942 | metadata_stream->metadata_len = 0; |
943 | ret = open_metadata_fp_write(metadata_stream, metadata_buf, &size); | |
944 | if (ret < 0) { | |
945 | goto error; | |
946 | } | |
9abca178 JD |
947 | |
948 | do { | |
d1694e41 JD |
949 | if (lttng_live_should_quit()) { |
950 | ret = -1; | |
951 | goto error; | |
952 | } | |
9abca178 JD |
953 | /* |
954 | * get_one_metadata_packet returns the number of bytes | |
955 | * received, 0 when we have received everything, a | |
956 | * negative value on error. | |
957 | */ | |
958 | ret = get_one_metadata_packet(ctx, metadata_stream); | |
c111d5d7 MD |
959 | if (ret > 0) { |
960 | len_read += ret; | |
961 | } | |
85e2085e MD |
962 | if (!len_read) { |
963 | (void) poll(NULL, 0, ACTIVE_POLL_DELAY); | |
964 | } | |
70e09c94 MD |
965 | if (ret < 0) { |
966 | break; /* Stop on error. */ | |
967 | } | |
c111d5d7 | 968 | } while (ret > 0 || !len_read); |
9abca178 | 969 | |
91bb0024 MD |
970 | if (babeltrace_close_memstream(metadata_buf, &size, |
971 | metadata_stream->metadata_fp_write)) { | |
972 | perror("babeltrace_close_memstream"); | |
973 | } | |
af701dc4 JD |
974 | metadata_stream->metadata_fp_write = NULL; |
975 | ||
976 | error: | |
9abca178 JD |
977 | return ret; |
978 | } | |
979 | ||
fb6b45aa JD |
980 | /* |
981 | * Assign the fields from a lttng_viewer_index to a packet_index. | |
982 | */ | |
983 | static | |
984 | void lttng_index_to_packet_index(struct lttng_viewer_index *lindex, | |
985 | struct packet_index *pindex) | |
986 | { | |
987 | assert(lindex); | |
988 | assert(pindex); | |
989 | ||
990 | pindex->offset = be64toh(lindex->offset); | |
991 | pindex->packet_size = be64toh(lindex->packet_size); | |
992 | pindex->content_size = be64toh(lindex->content_size); | |
993 | pindex->ts_cycles.timestamp_begin = be64toh(lindex->timestamp_begin); | |
994 | pindex->ts_cycles.timestamp_end = be64toh(lindex->timestamp_end); | |
995 | pindex->events_discarded = be64toh(lindex->events_discarded); | |
996 | } | |
997 | ||
4a744367 JD |
998 | /* |
999 | * Get one index for a stream. | |
1000 | * | |
1001 | * Returns 0 on success or a negative value on error. | |
1002 | */ | |
1003 | static | |
1004 | int get_next_index(struct lttng_live_ctx *ctx, | |
1005 | struct lttng_live_viewer_stream *viewer_stream, | |
fb6b45aa | 1006 | struct packet_index *index, uint64_t *stream_id) |
4a744367 JD |
1007 | { |
1008 | struct lttng_viewer_cmd cmd; | |
1009 | struct lttng_viewer_get_next_index rq; | |
4a744367 | 1010 | int ret; |
4a744367 | 1011 | ssize_t ret_len; |
fb6b45aa | 1012 | struct lttng_viewer_index *rp = &viewer_stream->current_index; |
b727abf5 JR |
1013 | const size_t cmd_buf_len = sizeof(cmd) + sizeof(rq); |
1014 | char cmd_buf[cmd_buf_len]; | |
4a744367 JD |
1015 | |
1016 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_NEXT_INDEX); | |
259863bd | 1017 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); |
e11a3d28 | 1018 | cmd.cmd_version = htobe32(0); |
4a744367 JD |
1019 | |
1020 | memset(&rq, 0, sizeof(rq)); | |
1021 | rq.stream_id = htobe64(viewer_stream->id); | |
1022 | ||
b727abf5 JR |
1023 | /* |
1024 | * Merge the cmd and connection request to prevent a write-write | |
1025 | * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the | |
1026 | * second write to be performed quickly in presence of Nagle's algorithm. | |
1027 | */ | |
1028 | memcpy(cmd_buf, &cmd, sizeof(cmd)); | |
1029 | memcpy(cmd_buf + sizeof(cmd), &rq, sizeof(rq)); | |
4a744367 | 1030 | retry: |
8ace20bf MD |
1031 | if (lttng_live_should_quit()) { |
1032 | ret = -1; | |
1033 | goto end; | |
1034 | } | |
b727abf5 | 1035 | ret_len = lttng_live_send(ctx->control_sock, &cmd_buf, cmd_buf_len); |
4a744367 | 1036 | if (ret_len < 0) { |
b727abf5 | 1037 | perror("[error] Error sending get_next_index cmd and request"); |
4a744367 JD |
1038 | goto error; |
1039 | } | |
b727abf5 | 1040 | assert(ret_len == cmd_buf_len); |
4a744367 | 1041 | |
fb6b45aa | 1042 | ret_len = lttng_live_recv(ctx->control_sock, rp, sizeof(*rp)); |
f8612f31 MD |
1043 | if (ret_len == 0) { |
1044 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
1045 | goto error; |
1046 | } | |
4a744367 | 1047 | if (ret_len < 0) { |
79620497 | 1048 | perror("[error] Error receiving index response"); |
4a744367 JD |
1049 | goto error; |
1050 | } | |
fb6b45aa | 1051 | assert(ret_len == sizeof(*rp)); |
4a744367 | 1052 | |
fb6b45aa | 1053 | rp->flags = be32toh(rp->flags); |
4a744367 | 1054 | |
fb6b45aa | 1055 | switch (be32toh(rp->status)) { |
4a744367 JD |
1056 | case LTTNG_VIEWER_INDEX_INACTIVE: |
1057 | printf_verbose("get_next_index: inactive\n"); | |
ad5c40d0 JR |
1058 | |
1059 | if (index->ts_cycles.timestamp_end == | |
1060 | be64toh(rp->timestamp_end)) { | |
1061 | /* Already seen this timestamp. */ | |
1062 | (void) poll(NULL, 0, ACTIVE_POLL_DELAY); | |
1063 | } | |
1064 | ||
4a744367 | 1065 | memset(index, 0, sizeof(struct packet_index)); |
fb6b45aa JD |
1066 | index->ts_cycles.timestamp_end = be64toh(rp->timestamp_end); |
1067 | *stream_id = be64toh(rp->stream_id); | |
4a744367 JD |
1068 | break; |
1069 | case LTTNG_VIEWER_INDEX_OK: | |
1070 | printf_verbose("get_next_index: Ok, need metadata update : %u\n", | |
fb6b45aa JD |
1071 | rp->flags & LTTNG_VIEWER_FLAG_NEW_METADATA); |
1072 | lttng_index_to_packet_index(rp, index); | |
1073 | *stream_id = be64toh(rp->stream_id); | |
1074 | viewer_stream->data_pending = 1; | |
4a744367 | 1075 | |
fb6b45aa | 1076 | if (rp->flags & LTTNG_VIEWER_FLAG_NEW_METADATA) { |
50d207af JD |
1077 | ret = append_metadata(ctx, viewer_stream); |
1078 | if (ret) | |
4a744367 | 1079 | goto error; |
4a744367 | 1080 | } |
fb6b45aa | 1081 | if (rp->flags & LTTNG_VIEWER_FLAG_NEW_STREAM) { |
73b2b0d1 | 1082 | printf_verbose("get_next_index: need new streams\n"); |
2acdc547 | 1083 | ret = ask_new_streams(ctx); |
7840bb08 | 1084 | if (ret < 0) { |
2acdc547 | 1085 | goto error; |
7840bb08 JD |
1086 | } else if (ret > 0) { |
1087 | ret = add_traces(ctx); | |
1088 | if (ret < 0) { | |
1089 | goto error; | |
1090 | } | |
1091 | } | |
2acdc547 | 1092 | } |
4a744367 JD |
1093 | break; |
1094 | case LTTNG_VIEWER_INDEX_RETRY: | |
1095 | printf_verbose("get_next_index: retry\n"); | |
85e2085e | 1096 | (void) poll(NULL, 0, ACTIVE_POLL_DELAY); |
4a744367 JD |
1097 | goto retry; |
1098 | case LTTNG_VIEWER_INDEX_HUP: | |
1099 | printf_verbose("get_next_index: stream hung up\n"); | |
1100 | viewer_stream->id = -1ULL; | |
4a744367 | 1101 | index->offset = EOF; |
2acdc547 | 1102 | ctx->session->stream_count--; |
bb35f032 MD |
1103 | viewer_stream->in_trace = 0; |
1104 | bt_list_del(&viewer_stream->trace_stream_node); | |
1105 | bt_list_del(&viewer_stream->session_stream_node); | |
1106 | g_free(viewer_stream); | |
4a744367 JD |
1107 | break; |
1108 | case LTTNG_VIEWER_INDEX_ERR: | |
1109 | fprintf(stderr, "[error] get_next_index: error\n"); | |
4a744367 JD |
1110 | goto error; |
1111 | default: | |
1112 | fprintf(stderr, "[error] get_next_index: unkwown value\n"); | |
4a744367 JD |
1113 | goto error; |
1114 | } | |
4a744367 | 1115 | ret = 0; |
8ace20bf MD |
1116 | end: |
1117 | return ret; | |
4a744367 JD |
1118 | |
1119 | error: | |
8ace20bf | 1120 | return -1; |
4a744367 JD |
1121 | } |
1122 | ||
fb6b45aa JD |
1123 | static |
1124 | void read_packet_header(struct ctf_stream_pos *pos, | |
1125 | struct ctf_file_stream *file_stream) | |
1126 | { | |
1127 | int ret; | |
1128 | ||
1129 | /* update trace_packet_header and stream_packet_context */ | |
fcf10417 JG |
1130 | if (!(pos->prot & PROT_WRITE) && |
1131 | file_stream->parent.trace_packet_header) { | |
fb6b45aa JD |
1132 | /* Read packet header */ |
1133 | ret = generic_rw(&pos->parent, | |
1134 | &file_stream->parent.trace_packet_header->p); | |
1135 | if (ret) { | |
1136 | pos->offset = EOF; | |
1137 | fprintf(stderr, "[error] trace packet " | |
1138 | "header read failed\n"); | |
1139 | goto end; | |
1140 | } | |
1141 | } | |
fcf10417 JG |
1142 | if (!(pos->prot & PROT_WRITE) && |
1143 | file_stream->parent.stream_packet_context) { | |
fb6b45aa JD |
1144 | /* Read packet context */ |
1145 | ret = generic_rw(&pos->parent, | |
1146 | &file_stream->parent.stream_packet_context->p); | |
1147 | if (ret) { | |
1148 | pos->offset = EOF; | |
1149 | fprintf(stderr, "[error] stream packet " | |
1150 | "context read failed\n"); | |
1151 | goto end; | |
1152 | } | |
1153 | } | |
1154 | pos->data_offset = pos->offset; | |
1155 | ||
1156 | end: | |
1157 | return; | |
1158 | } | |
1159 | ||
1160 | /* | |
1161 | * Handle the seek parameters. | |
1162 | * Returns 0 if the packet_seek can continue, a positive value to | |
1163 | * cleanly exit the packet_seek, a negative value on error. | |
1164 | */ | |
1165 | static | |
1166 | int handle_seek_position(size_t index, int whence, | |
1167 | struct lttng_live_viewer_stream *viewer_stream, | |
1168 | struct ctf_stream_pos *pos, | |
1169 | struct ctf_file_stream *file_stream) | |
1170 | { | |
6a724a1e | 1171 | int ret = 0; |
fb6b45aa JD |
1172 | |
1173 | switch (whence) { | |
1174 | case SEEK_CUR: | |
1175 | ret = 0; | |
1176 | goto end; | |
1177 | case SEEK_SET: | |
1178 | /* | |
1179 | * We only allow to seek to 0. | |
1180 | */ | |
1181 | if (index != 0) { | |
1182 | fprintf(stderr, "[error] Arbitrary seek in lttng-live " | |
1183 | "trace not supported\n"); | |
1184 | pos->offset = EOF; | |
1185 | ret = -1; | |
1186 | goto end; | |
1187 | } | |
1188 | ||
1189 | ret = 0; | |
1190 | goto end; | |
1191 | ||
1192 | default: | |
1193 | fprintf(stderr, "[error] Invalid seek parameter\n"); | |
1194 | assert(0); | |
1195 | } | |
1196 | ||
1197 | end: | |
1198 | return ret; | |
1199 | } | |
1200 | ||
b5a1fa45 | 1201 | static |
4a744367 JD |
1202 | void ctf_live_packet_seek(struct bt_stream_pos *stream_pos, size_t index, |
1203 | int whence) | |
1204 | { | |
1205 | struct ctf_stream_pos *pos; | |
1206 | struct ctf_file_stream *file_stream; | |
f1f52630 | 1207 | struct packet_index *prev_index = NULL, *cur_index; |
4a744367 JD |
1208 | struct lttng_live_viewer_stream *viewer_stream; |
1209 | struct lttng_live_session *session; | |
fb6b45aa | 1210 | uint64_t stream_id = -1ULL; |
4a744367 JD |
1211 | int ret; |
1212 | ||
4a744367 JD |
1213 | pos = ctf_pos(stream_pos); |
1214 | file_stream = container_of(pos, struct ctf_file_stream, pos); | |
1215 | viewer_stream = (struct lttng_live_viewer_stream *) pos->priv; | |
1216 | session = viewer_stream->session; | |
1217 | ||
fb6b45aa JD |
1218 | ret = handle_seek_position(index, whence, viewer_stream, pos, |
1219 | file_stream); | |
1220 | if (ret != 0) { | |
1221 | return; | |
1222 | } | |
1223 | ||
1224 | retry: | |
f1f52630 MD |
1225 | switch (pos->packet_index->len) { |
1226 | case 0: | |
1227 | g_array_set_size(pos->packet_index, 1); | |
1228 | cur_index = &g_array_index(pos->packet_index, | |
1229 | struct packet_index, 0); | |
1230 | break; | |
1231 | case 1: | |
1232 | g_array_set_size(pos->packet_index, 2); | |
1233 | prev_index = &g_array_index(pos->packet_index, | |
1234 | struct packet_index, 0); | |
1235 | cur_index = &g_array_index(pos->packet_index, | |
1236 | struct packet_index, 1); | |
1237 | break; | |
1238 | case 2: | |
1239 | g_array_index(pos->packet_index, | |
1240 | struct packet_index, 0) = | |
1241 | g_array_index(pos->packet_index, | |
1242 | struct packet_index, 1); | |
1243 | prev_index = &g_array_index(pos->packet_index, | |
1244 | struct packet_index, 0); | |
1245 | cur_index = &g_array_index(pos->packet_index, | |
1246 | struct packet_index, 1); | |
1247 | break; | |
1248 | default: | |
1249 | abort(); | |
1250 | break; | |
1251 | } | |
fb6b45aa JD |
1252 | |
1253 | if (viewer_stream->data_pending) { | |
1254 | lttng_index_to_packet_index(&viewer_stream->current_index, cur_index); | |
1255 | } else { | |
1256 | printf_verbose("get_next_index for stream %" PRIu64 "\n", viewer_stream->id); | |
1257 | ret = get_next_index(session->ctx, viewer_stream, cur_index, &stream_id); | |
1258 | if (ret < 0) { | |
1259 | pos->offset = EOF; | |
1260 | if (!lttng_live_should_quit()) { | |
1261 | fprintf(stderr, "[error] get_next_index failed\n"); | |
1262 | } | |
1263 | return; | |
e29395a8 | 1264 | } |
fb6b45aa JD |
1265 | printf_verbose("Index received : packet_size : %" PRIu64 |
1266 | ", offset %" PRIu64 ", content_size %" PRIu64 | |
1267 | ", timestamp_end : %" PRIu64 "\n", | |
1268 | cur_index->packet_size, cur_index->offset, | |
1269 | cur_index->content_size, | |
1270 | cur_index->ts_cycles.timestamp_end); | |
1271 | ||
1272 | } | |
1273 | ||
1274 | /* | |
1275 | * On the first time we receive an index, the stream_id needs to | |
1276 | * be set for the stream in order to use it, we don't want any | |
1277 | * data at this stage. | |
1278 | */ | |
1279 | if (file_stream->parent.stream_id == -1ULL) { | |
1280 | /* | |
1281 | * Warning: with lttng-tools < 2.4.2, the beacon does not | |
1282 | * contain the real stream ID, it is memset to 0, so this | |
1283 | * might create a problem when a session has multiple | |
1284 | * channels. We can't detect it at this stage, lttng-tools | |
1285 | * has to be upgraded to fix this problem. | |
1286 | */ | |
1287 | printf_verbose("Assigning stream_id %" PRIu64 "\n", | |
1288 | stream_id); | |
1289 | file_stream->parent.stream_id = stream_id; | |
1290 | viewer_stream->ctf_stream_id = stream_id; | |
1291 | ||
4a744367 JD |
1292 | return; |
1293 | } | |
1294 | ||
f1f52630 MD |
1295 | pos->packet_size = cur_index->packet_size; |
1296 | pos->content_size = cur_index->content_size; | |
4a744367 | 1297 | pos->mmap_base_offset = 0; |
f1f52630 | 1298 | if (cur_index->offset == EOF) { |
4a744367 JD |
1299 | pos->offset = EOF; |
1300 | } else { | |
1301 | pos->offset = 0; | |
1302 | } | |
1303 | ||
f1f52630 | 1304 | if (cur_index->content_size == 0) { |
c0bed139 | 1305 | /* Beacon packet index */ |
fb6b45aa JD |
1306 | if (file_stream->parent.stream_class) { |
1307 | file_stream->parent.cycles_timestamp = | |
f1f52630 | 1308 | cur_index->ts_cycles.timestamp_end; |
fb6b45aa JD |
1309 | file_stream->parent.real_timestamp = ctf_get_real_timestamp( |
1310 | &file_stream->parent, | |
1311 | cur_index->ts_cycles.timestamp_end); | |
c0bed139 JD |
1312 | |
1313 | /* | |
1314 | * Duplicate the data from the previous index, because | |
1315 | * the one we just received is only a beacon with no | |
1316 | * relevant information except the timestamp_end. We | |
1317 | * don't need to keep this timestamp_end because we already | |
1318 | * updated the file_stream timestamps, so we only need | |
1319 | * to keep the last real index data as prev_index. That | |
1320 | * way, we keep the original prev timestamps and | |
1321 | * discarded events counter. This is the same behaviour | |
1322 | * as if we were reading a local trace, we would not | |
1323 | * have fake indexes between real indexes. | |
1324 | */ | |
1325 | memcpy(cur_index, prev_index, sizeof(struct packet_index)); | |
fb6b45aa | 1326 | } |
4a744367 | 1327 | } else { |
c0bed139 | 1328 | /* Real packet index */ |
fb6b45aa JD |
1329 | if (file_stream->parent.stream_class) { |
1330 | /* Convert the timestamps and append to the real_index. */ | |
1331 | cur_index->ts_real.timestamp_begin = ctf_get_real_timestamp( | |
1332 | &file_stream->parent, | |
1333 | cur_index->ts_cycles.timestamp_begin); | |
1334 | cur_index->ts_real.timestamp_end = ctf_get_real_timestamp( | |
1335 | &file_stream->parent, | |
1336 | cur_index->ts_cycles.timestamp_end); | |
1337 | } | |
f1f52630 MD |
1338 | |
1339 | ctf_update_current_packet_index(&file_stream->parent, | |
1340 | prev_index, cur_index); | |
1341 | ||
7371a182 MD |
1342 | /* |
1343 | * We need to check if we are in trace read or called | |
1344 | * from packet indexing. In this last case, the | |
1345 | * collection is not there, so we cannot print the | |
1346 | * timestamps. | |
1347 | */ | |
1348 | if ((&file_stream->parent)->stream_class->trace->parent.collection) { | |
1349 | ctf_print_discarded_lost(stderr, &file_stream->parent); | |
1350 | } | |
1351 | ||
f1f52630 MD |
1352 | file_stream->parent.cycles_timestamp = |
1353 | cur_index->ts_cycles.timestamp_begin; | |
1354 | file_stream->parent.real_timestamp = | |
1355 | cur_index->ts_real.timestamp_begin; | |
4a744367 JD |
1356 | } |
1357 | ||
8dcb4e83 JG |
1358 | /* |
1359 | * Flush the output between attempts to grab a packet, thus | |
1360 | * ensuring we flush at least at the periodical timer period. | |
1361 | * This ensures the output remains reactive for interactive users and | |
1362 | * that the output is flushed when redirected to a file by the shell. | |
1363 | */ | |
1364 | if (fflush(LTTNG_LIVE_OUTPUT_FP) < 0) { | |
1365 | perror("fflush"); | |
1366 | goto end; | |
1367 | } | |
1368 | ||
4a744367 JD |
1369 | if (pos->packet_size == 0 || pos->offset == EOF) { |
1370 | goto end; | |
1371 | } | |
1372 | ||
1373 | printf_verbose("get_data_packet for stream %" PRIu64 "\n", | |
1374 | viewer_stream->id); | |
1375 | ret = get_data_packet(session->ctx, pos, viewer_stream, | |
c1e8ac81 | 1376 | cur_index->offset, |
f1f52630 | 1377 | cur_index->packet_size / CHAR_BIT); |
4a744367 JD |
1378 | if (ret == -2) { |
1379 | goto retry; | |
1380 | } else if (ret < 0) { | |
1381 | pos->offset = EOF; | |
e29395a8 JG |
1382 | if (!lttng_live_should_quit()) { |
1383 | fprintf(stderr, "[error] get_data_packet failed\n"); | |
1384 | } | |
4a744367 JD |
1385 | return; |
1386 | } | |
fb6b45aa | 1387 | viewer_stream->data_pending = 0; |
4a744367 | 1388 | |
fb6b45aa | 1389 | read_packet_header(pos, file_stream); |
4a744367 JD |
1390 | |
1391 | end: | |
1392 | return; | |
1393 | } | |
1394 | ||
2acdc547 JD |
1395 | int lttng_live_create_viewer_session(struct lttng_live_ctx *ctx) |
1396 | { | |
1397 | struct lttng_viewer_cmd cmd; | |
1398 | struct lttng_viewer_create_session_response resp; | |
1399 | int ret; | |
1400 | ssize_t ret_len; | |
1401 | ||
8ace20bf MD |
1402 | if (lttng_live_should_quit()) { |
1403 | ret = -1; | |
1404 | goto end; | |
1405 | } | |
1406 | ||
2acdc547 | 1407 | cmd.cmd = htobe32(LTTNG_VIEWER_CREATE_SESSION); |
259863bd | 1408 | cmd.data_size = htobe64((uint64_t) 0); |
e11a3d28 | 1409 | cmd.cmd_version = htobe32(0); |
2acdc547 | 1410 | |
b7e8a8e1 | 1411 | ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd)); |
2acdc547 | 1412 | if (ret_len < 0) { |
79620497 | 1413 | perror("[error] Error sending cmd"); |
2acdc547 JD |
1414 | goto error; |
1415 | } | |
1416 | assert(ret_len == sizeof(cmd)); | |
1417 | ||
b7e8a8e1 | 1418 | ret_len = lttng_live_recv(ctx->control_sock, &resp, sizeof(resp)); |
f8612f31 MD |
1419 | if (ret_len == 0) { |
1420 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
1421 | goto error; |
1422 | } | |
2acdc547 | 1423 | if (ret_len < 0) { |
79620497 | 1424 | perror("[error] Error receiving create session reply"); |
2acdc547 JD |
1425 | goto error; |
1426 | } | |
1427 | assert(ret_len == sizeof(resp)); | |
1428 | ||
1429 | if (be32toh(resp.status) != LTTNG_VIEWER_CREATE_SESSION_OK) { | |
1430 | fprintf(stderr, "[error] Error creating viewer session\n"); | |
2acdc547 JD |
1431 | goto error; |
1432 | } | |
1433 | ret = 0; | |
8ace20bf MD |
1434 | end: |
1435 | return ret; | |
2acdc547 JD |
1436 | |
1437 | error: | |
8ace20bf | 1438 | return -1; |
2acdc547 JD |
1439 | } |
1440 | ||
1441 | static | |
1442 | int del_traces(gpointer key, gpointer value, gpointer user_data) | |
4a744367 JD |
1443 | { |
1444 | struct bt_context *bt_ctx = user_data; | |
1445 | struct lttng_live_ctf_trace *trace = value; | |
1446 | int ret; | |
bb35f032 | 1447 | struct lttng_live_viewer_stream *lvstream, *tmp; |
4a744367 | 1448 | |
bb35f032 MD |
1449 | /* |
1450 | * We don't have ownership of the live viewer stream, just | |
1451 | * remove them from our list. | |
1452 | */ | |
1453 | bt_list_for_each_entry_safe(lvstream, tmp, &trace->stream_list, | |
1454 | trace_stream_node) { | |
1455 | lvstream->in_trace = 0; | |
1456 | bt_list_del(&lvstream->trace_stream_node); | |
1457 | } | |
1458 | if (trace->in_use) { | |
1459 | ret = bt_context_remove_trace(bt_ctx, trace->trace_id); | |
1460 | if (ret < 0) | |
1461 | fprintf(stderr, "[error] removing trace from context\n"); | |
1462 | } | |
4a744367 JD |
1463 | |
1464 | /* remove the key/value pair from the HT. */ | |
1465 | return 1; | |
1466 | } | |
1467 | ||
2acdc547 | 1468 | static |
7840bb08 JD |
1469 | int add_one_trace(struct lttng_live_ctx *ctx, |
1470 | struct lttng_live_ctf_trace *trace) | |
4a744367 | 1471 | { |
bb35f032 | 1472 | int ret; |
7840bb08 | 1473 | struct bt_context *bt_ctx = ctx->bt_ctx; |
4a744367 JD |
1474 | struct lttng_live_viewer_stream *stream; |
1475 | struct bt_mmap_stream *new_mmap_stream; | |
1476 | struct bt_mmap_stream_list mmap_list; | |
150595c4 JD |
1477 | struct bt_trace_descriptor *td; |
1478 | struct bt_trace_handle *handle; | |
4a744367 | 1479 | |
b5a1fa45 JD |
1480 | /* |
1481 | * We don't know how many streams we will receive for a trace, so | |
1482 | * once we are done receiving the traces, we add all the traces | |
1483 | * received to the bt_context. | |
1484 | * We can receive streams during the attach command or the | |
1485 | * get_new_streams, so we have to make sure not to add multiple | |
1486 | * times the same traces. | |
1487 | * If a trace is already in the context, we just skip this function. | |
1488 | */ | |
7840bb08 JD |
1489 | if (trace->in_use) { |
1490 | ret = 0; | |
1491 | goto end; | |
1492 | } | |
2acdc547 | 1493 | |
4a744367 JD |
1494 | BT_INIT_LIST_HEAD(&mmap_list.head); |
1495 | ||
bb35f032 | 1496 | bt_list_for_each_entry(stream, &trace->stream_list, trace_stream_node) { |
4a744367 JD |
1497 | if (!stream->metadata_flag) { |
1498 | new_mmap_stream = zmalloc(sizeof(struct bt_mmap_stream)); | |
1499 | new_mmap_stream->priv = (void *) stream; | |
1500 | new_mmap_stream->fd = -1; | |
1501 | bt_list_add(&new_mmap_stream->list, &mmap_list.head); | |
1502 | } else { | |
af701dc4 JD |
1503 | char *metadata_buf = NULL; |
1504 | ||
4a744367 | 1505 | /* Get all possible metadata before starting */ |
af701dc4 JD |
1506 | ret = get_new_metadata(ctx, stream, &metadata_buf); |
1507 | if (ret) { | |
1508 | free(metadata_buf); | |
1509 | goto end_free; | |
1510 | } | |
1511 | if (!stream->metadata_len) { | |
1512 | fprintf(stderr, "[error] empty metadata\n"); | |
1513 | ret = -1; | |
1514 | free(metadata_buf); | |
1515 | goto end_free; | |
1516 | } | |
1517 | ||
1518 | trace->metadata_fp = babeltrace_fmemopen(metadata_buf, | |
1519 | stream->metadata_len, "rb"); | |
1520 | if (!trace->metadata_fp) { | |
1521 | perror("Metadata fmemopen"); | |
1522 | ret = -1; | |
1523 | free(metadata_buf); | |
9abca178 | 1524 | goto end_free; |
af701dc4 | 1525 | } |
4a744367 JD |
1526 | } |
1527 | } | |
1528 | ||
1529 | if (!trace->metadata_fp) { | |
1530 | fprintf(stderr, "[error] No metadata stream opened\n"); | |
7840bb08 | 1531 | ret = -1; |
4a744367 JD |
1532 | goto end_free; |
1533 | } | |
1534 | ||
1535 | ret = bt_context_add_trace(bt_ctx, NULL, "ctf", | |
1536 | ctf_live_packet_seek, &mmap_list, trace->metadata_fp); | |
1537 | if (ret < 0) { | |
1538 | fprintf(stderr, "[error] Error adding trace\n"); | |
7840bb08 | 1539 | ret = -1; |
4a744367 JD |
1540 | goto end_free; |
1541 | } | |
af701dc4 JD |
1542 | trace->metadata_stream->metadata_len = 0; |
1543 | ||
150595c4 JD |
1544 | handle = (struct bt_trace_handle *) g_hash_table_lookup( |
1545 | bt_ctx->trace_handles, | |
1546 | (gpointer) (unsigned long) ret); | |
1547 | td = handle->td; | |
1548 | trace->handle = handle; | |
2acdc547 | 1549 | if (bt_ctx->current_iterator) { |
2acdc547 JD |
1550 | bt_iter_add_trace(bt_ctx->current_iterator, td); |
1551 | } | |
1552 | ||
4a744367 | 1553 | trace->trace_id = ret; |
2acdc547 | 1554 | trace->in_use = 1; |
4a744367 JD |
1555 | |
1556 | goto end; | |
1557 | ||
1558 | end_free: | |
1559 | bt_context_put(bt_ctx); | |
1560 | end: | |
7840bb08 JD |
1561 | return ret; |
1562 | } | |
1563 | ||
1564 | static | |
1565 | int add_traces(struct lttng_live_ctx *ctx) | |
1566 | { | |
1567 | int ret; | |
1568 | struct lttng_live_ctf_trace *trace; | |
1569 | GHashTableIter it; | |
1570 | gpointer key; | |
1571 | gpointer value; | |
1572 | ||
1573 | g_hash_table_iter_init(&it, ctx->session->ctf_traces); | |
1574 | while (g_hash_table_iter_next(&it, &key, &value)) { | |
1575 | trace = (struct lttng_live_ctf_trace *) value; | |
1576 | ret = add_one_trace(ctx, trace); | |
1577 | if (ret < 0) { | |
1578 | goto end; | |
1579 | } | |
1580 | } | |
1581 | ||
1582 | ret = 0; | |
1583 | ||
1584 | end: | |
1585 | return ret; | |
4a744367 JD |
1586 | } |
1587 | ||
73b2b0d1 JD |
1588 | /* |
1589 | * Request new streams for a session. | |
1590 | * Returns the number of streams received or a negative value on error. | |
1591 | */ | |
2acdc547 | 1592 | int lttng_live_get_new_streams(struct lttng_live_ctx *ctx, uint64_t id) |
6192b988 JD |
1593 | { |
1594 | struct lttng_viewer_cmd cmd; | |
2acdc547 JD |
1595 | struct lttng_viewer_new_streams_request rq; |
1596 | struct lttng_viewer_new_streams_response rp; | |
1597 | struct lttng_viewer_stream stream; | |
73b2b0d1 | 1598 | int ret, i, nb_streams = 0; |
6192b988 | 1599 | ssize_t ret_len; |
b5a1fa45 | 1600 | uint32_t stream_count; |
b727abf5 JR |
1601 | const size_t cmd_buf_len = sizeof(cmd) + sizeof(rq); |
1602 | char cmd_buf[cmd_buf_len]; | |
6192b988 | 1603 | |
8ace20bf MD |
1604 | if (lttng_live_should_quit()) { |
1605 | ret = -1; | |
1606 | goto end; | |
1607 | } | |
1608 | ||
2acdc547 | 1609 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_NEW_STREAMS); |
259863bd | 1610 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); |
e11a3d28 | 1611 | cmd.cmd_version = htobe32(0); |
6192b988 | 1612 | |
2acdc547 JD |
1613 | memset(&rq, 0, sizeof(rq)); |
1614 | rq.session_id = htobe64(id); | |
1615 | ||
b727abf5 JR |
1616 | /* |
1617 | * Merge the cmd and connection request to prevent a write-write | |
1618 | * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the | |
1619 | * second write to be performed quickly in presence of Nagle's algorithm. | |
1620 | */ | |
1621 | memcpy(cmd_buf, &cmd, sizeof(cmd)); | |
1622 | memcpy(cmd_buf + sizeof(cmd), &rq, sizeof(rq)); | |
6192b988 | 1623 | |
b727abf5 | 1624 | ret_len = lttng_live_send(ctx->control_sock, cmd_buf, cmd_buf_len); |
6192b988 | 1625 | if (ret_len < 0) { |
b727abf5 | 1626 | perror("[error] Error sending get_new_streams cmd and request"); |
6192b988 JD |
1627 | goto error; |
1628 | } | |
b727abf5 | 1629 | assert(ret_len == cmd_buf_len); |
6192b988 | 1630 | |
b7e8a8e1 | 1631 | ret_len = lttng_live_recv(ctx->control_sock, &rp, sizeof(rp)); |
f8612f31 MD |
1632 | if (ret_len == 0) { |
1633 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
1634 | goto error; |
1635 | } | |
2acdc547 | 1636 | if (ret_len < 0) { |
79620497 | 1637 | perror("[error] Error receiving get_new_streams response"); |
6192b988 JD |
1638 | goto error; |
1639 | } | |
2acdc547 JD |
1640 | assert(ret_len == sizeof(rp)); |
1641 | ||
1642 | switch(be32toh(rp.status)) { | |
1643 | case LTTNG_VIEWER_NEW_STREAMS_OK: | |
1644 | break; | |
1645 | case LTTNG_VIEWER_NEW_STREAMS_NO_NEW: | |
1646 | ret = 0; | |
1647 | goto end; | |
1648 | case LTTNG_VIEWER_NEW_STREAMS_HUP: | |
1649 | ret = -LTTNG_VIEWER_NEW_STREAMS_HUP; | |
1650 | goto end; | |
1651 | case LTTNG_VIEWER_NEW_STREAMS_ERR: | |
1652 | fprintf(stderr, "[error] get_new_streams error\n"); | |
8ace20bf | 1653 | goto error; |
2acdc547 JD |
1654 | default: |
1655 | fprintf(stderr, "[error] Unknown return code %u\n", | |
1656 | be32toh(rp.status)); | |
8ace20bf | 1657 | goto error; |
2acdc547 JD |
1658 | } |
1659 | ||
b5a1fa45 JD |
1660 | stream_count = be32toh(rp.streams_count); |
1661 | ctx->session->stream_count += stream_count; | |
2acdc547 JD |
1662 | /* |
1663 | * When the session is created but not started, we do an active wait | |
1664 | * until it starts. It allows the viewer to start processing the trace | |
1665 | * as soon as the session starts. | |
1666 | */ | |
1667 | if (ctx->session->stream_count == 0) { | |
1668 | ret = 0; | |
1669 | goto end; | |
1670 | } | |
21fe3eb3 MD |
1671 | printf_verbose("Waiting for %d streams:\n", stream_count); |
1672 | ||
b5a1fa45 | 1673 | for (i = 0; i < stream_count; i++) { |
21fe3eb3 MD |
1674 | struct lttng_live_viewer_stream *lvstream; |
1675 | ||
1676 | lvstream = g_new0(struct lttng_live_viewer_stream, 1); | |
1677 | ret_len = lttng_live_recv(ctx->control_sock, &stream, | |
1678 | sizeof(stream)); | |
f8612f31 MD |
1679 | if (ret_len == 0) { |
1680 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
21fe3eb3 | 1681 | g_free(lvstream); |
f8612f31 MD |
1682 | goto error; |
1683 | } | |
2acdc547 | 1684 | if (ret_len < 0) { |
79620497 | 1685 | perror("[error] Error receiving stream"); |
21fe3eb3 | 1686 | g_free(lvstream); |
2acdc547 JD |
1687 | goto error; |
1688 | } | |
1689 | assert(ret_len == sizeof(stream)); | |
1690 | stream.path_name[LTTNG_VIEWER_PATH_MAX - 1] = '\0'; | |
1691 | stream.channel_name[LTTNG_VIEWER_NAME_MAX - 1] = '\0'; | |
1692 | ||
1693 | printf_verbose(" stream %" PRIu64 " : %s/%s\n", | |
1694 | be64toh(stream.id), stream.path_name, | |
1695 | stream.channel_name); | |
21fe3eb3 MD |
1696 | lvstream->id = be64toh(stream.id); |
1697 | lvstream->session = ctx->session; | |
2acdc547 | 1698 | |
21fe3eb3 MD |
1699 | lvstream->mmap_size = 0; |
1700 | lvstream->ctf_stream_id = -1ULL; | |
2acdc547 JD |
1701 | |
1702 | if (be32toh(stream.metadata_flag)) { | |
21fe3eb3 | 1703 | lvstream->metadata_flag = 1; |
2acdc547 | 1704 | } |
21fe3eb3 | 1705 | ret = lttng_live_ctf_trace_assign(lvstream, |
2acdc547 JD |
1706 | be64toh(stream.ctf_trace_id)); |
1707 | if (ret < 0) { | |
21fe3eb3 | 1708 | g_free(lvstream); |
2acdc547 JD |
1709 | goto error; |
1710 | } | |
73b2b0d1 | 1711 | nb_streams++; |
bb35f032 | 1712 | bt_list_add(&lvstream->session_stream_node, |
21fe3eb3 | 1713 | &ctx->session->stream_list); |
2acdc547 | 1714 | } |
73b2b0d1 | 1715 | ret = nb_streams; |
2acdc547 | 1716 | end: |
6192b988 | 1717 | return ret; |
8ace20bf MD |
1718 | |
1719 | error: | |
1720 | return -1; | |
6192b988 JD |
1721 | } |
1722 | ||
28756729 | 1723 | int lttng_live_read(struct lttng_live_ctx *ctx) |
4a744367 | 1724 | { |
28756729 JG |
1725 | int ret = -1; |
1726 | int i; | |
4a744367 JD |
1727 | struct bt_ctf_iter *iter; |
1728 | const struct bt_ctf_event *event; | |
1729 | struct bt_iter_pos begin_pos; | |
1730 | struct bt_trace_descriptor *td_write; | |
1731 | struct bt_format *fmt_write; | |
1732 | struct ctf_text_stream_pos *sout; | |
2acdc547 | 1733 | uint64_t id; |
4a744367 | 1734 | |
2acdc547 JD |
1735 | ctx->bt_ctx = bt_context_create(); |
1736 | if (!ctx->bt_ctx) { | |
4a744367 JD |
1737 | fprintf(stderr, "[error] bt_context_create allocation\n"); |
1738 | goto end; | |
1739 | } | |
1740 | ||
1741 | fmt_write = bt_lookup_format(g_quark_from_static_string("text")); | |
1742 | if (!fmt_write) { | |
1743 | fprintf(stderr, "[error] ctf-text error\n"); | |
bb35f032 | 1744 | goto end_free; |
4a744367 JD |
1745 | } |
1746 | ||
1747 | td_write = fmt_write->open_trace(NULL, O_RDWR, NULL, NULL); | |
1748 | if (!td_write) { | |
1749 | fprintf(stderr, "[error] Error opening output trace\n"); | |
1750 | goto end_free; | |
1751 | } | |
1752 | ||
1753 | sout = container_of(td_write, struct ctf_text_stream_pos, | |
1754 | trace_descriptor); | |
85bb4663 | 1755 | if (!sout->parent.event_cb) { |
4a744367 | 1756 | goto end_free; |
85bb4663 | 1757 | } |
4a744367 | 1758 | |
6192b988 JD |
1759 | ret = lttng_live_create_viewer_session(ctx); |
1760 | if (ret < 0) { | |
1761 | goto end_free; | |
1762 | } | |
1763 | ||
2acdc547 JD |
1764 | for (i = 0; i < ctx->session_ids->len; i++) { |
1765 | id = g_array_index(ctx->session_ids, uint64_t, i); | |
7e5e4176 | 1766 | printf_verbose("Attaching to session %" PRIu64 "\n", id); |
2acdc547 JD |
1767 | ret = lttng_live_attach_session(ctx, id); |
1768 | printf_verbose("Attaching session returns %d\n", ret); | |
1769 | if (ret < 0) { | |
1770 | if (ret == -LTTNG_VIEWER_ATTACH_UNK) { | |
1771 | fprintf(stderr, "[error] Unknown session ID\n"); | |
1772 | } | |
1773 | goto end_free; | |
1774 | } | |
1775 | } | |
1776 | ||
4a744367 | 1777 | /* |
2acdc547 | 1778 | * As long as the session is active, we try to get new streams. |
4a744367 | 1779 | */ |
2acdc547 | 1780 | for (;;) { |
4a744367 JD |
1781 | int flags; |
1782 | ||
8ace20bf | 1783 | if (lttng_live_should_quit()) { |
28756729 | 1784 | ret = 0; |
8ace20bf MD |
1785 | goto end_free; |
1786 | } | |
1787 | ||
2acdc547 | 1788 | while (!ctx->session->stream_count) { |
8ace20bf MD |
1789 | if (lttng_live_should_quit() |
1790 | || ctx->session_ids->len == 0) { | |
28756729 | 1791 | ret = 0; |
4a744367 | 1792 | goto end_free; |
85bb4663 | 1793 | } |
2acdc547 | 1794 | ret = ask_new_streams(ctx); |
85bb4663 | 1795 | if (ret < 0) { |
6baf4b8e | 1796 | ret = 0; |
2acdc547 | 1797 | goto end_free; |
85bb4663 MD |
1798 | } |
1799 | if (!ctx->session->stream_count) { | |
85e2085e | 1800 | (void) poll(NULL, 0, ACTIVE_POLL_DELAY); |
85bb4663 | 1801 | } |
2acdc547 | 1802 | } |
4a744367 | 1803 | |
7840bb08 JD |
1804 | ret = add_traces(ctx); |
1805 | if (ret < 0) { | |
1806 | goto end_free; | |
1807 | } | |
4a744367 JD |
1808 | |
1809 | begin_pos.type = BT_SEEK_BEGIN; | |
2acdc547 | 1810 | iter = bt_ctf_iter_create(ctx->bt_ctx, &begin_pos, NULL); |
4a744367 | 1811 | if (!iter) { |
e29395a8 JG |
1812 | if (lttng_live_should_quit()) { |
1813 | ret = 0; | |
bb35f032 | 1814 | goto end_free; |
e29395a8 | 1815 | } |
4a744367 | 1816 | fprintf(stderr, "[error] Iterator creation error\n"); |
bb35f032 | 1817 | goto end_free; |
4a744367 JD |
1818 | } |
1819 | for (;;) { | |
8ace20bf | 1820 | if (lttng_live_should_quit()) { |
28756729 | 1821 | ret = 0; |
8ace20bf MD |
1822 | goto end_free; |
1823 | } | |
4a744367 JD |
1824 | event = bt_ctf_iter_read_event_flags(iter, &flags); |
1825 | if (!(flags & BT_ITER_FLAG_RETRY)) { | |
1826 | if (!event) { | |
1827 | /* End of trace */ | |
1828 | break; | |
1829 | } | |
1830 | ret = sout->parent.event_cb(&sout->parent, | |
1831 | event->parent->stream); | |
1832 | if (ret) { | |
1833 | fprintf(stderr, "[error] Writing " | |
1834 | "event failed.\n"); | |
1835 | goto end_free; | |
1836 | } | |
1837 | } | |
1838 | ret = bt_iter_next(bt_ctf_get_iter(iter)); | |
1839 | if (ret < 0) { | |
1840 | goto end_free; | |
1841 | } | |
1842 | } | |
1843 | bt_ctf_iter_destroy(iter); | |
2acdc547 JD |
1844 | g_hash_table_foreach_remove(ctx->session->ctf_traces, |
1845 | del_traces, ctx->bt_ctx); | |
1846 | ctx->session->stream_count = 0; | |
1847 | } | |
4a744367 JD |
1848 | |
1849 | end_free: | |
bb35f032 MD |
1850 | g_hash_table_foreach_remove(ctx->session->ctf_traces, |
1851 | del_traces, ctx->bt_ctx); | |
2acdc547 | 1852 | bt_context_put(ctx->bt_ctx); |
4a744367 | 1853 | end: |
e29395a8 JG |
1854 | if (lttng_live_should_quit()) { |
1855 | ret = 0; | |
1856 | } | |
28756729 | 1857 | return ret; |
4a744367 | 1858 | } |