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 JD |
392 | trace->ctf_trace_id = ctf_trace_id; |
393 | trace->streams = g_ptr_array_new(); | |
394 | g_hash_table_insert(stream->session->ctf_traces, | |
37307240 | 395 | &trace->ctf_trace_id, |
4a744367 JD |
396 | trace); |
397 | } | |
398 | if (stream->metadata_flag) | |
399 | trace->metadata_stream = stream; | |
400 | ||
401 | stream->ctf_trace = trace; | |
402 | g_ptr_array_add(trace->streams, stream); | |
403 | ||
4a744367 JD |
404 | return ret; |
405 | } | |
406 | ||
af701dc4 JD |
407 | static |
408 | int open_metadata_fp_write(struct lttng_live_viewer_stream *stream, | |
409 | char **metadata_buf, size_t *size) | |
410 | { | |
411 | int ret = 0; | |
412 | ||
413 | stream->metadata_fp_write = | |
414 | babeltrace_open_memstream(metadata_buf, size); | |
415 | if (!stream->metadata_fp_write) { | |
416 | perror("Metadata open_memstream"); | |
417 | ret = -1; | |
418 | } | |
419 | ||
420 | return ret; | |
421 | } | |
422 | ||
4a744367 JD |
423 | int lttng_live_attach_session(struct lttng_live_ctx *ctx, uint64_t id) |
424 | { | |
425 | struct lttng_viewer_cmd cmd; | |
426 | struct lttng_viewer_attach_session_request rq; | |
427 | struct lttng_viewer_attach_session_response rp; | |
428 | struct lttng_viewer_stream stream; | |
b727abf5 JR |
429 | const size_t cmd_buf_len = sizeof(cmd) + sizeof(rq); |
430 | char cmd_buf[cmd_buf_len]; | |
4a744367 JD |
431 | int ret, i; |
432 | ssize_t ret_len; | |
433 | ||
8ace20bf MD |
434 | if (lttng_live_should_quit()) { |
435 | ret = -1; | |
436 | goto end; | |
437 | } | |
438 | ||
4a744367 | 439 | cmd.cmd = htobe32(LTTNG_VIEWER_ATTACH_SESSION); |
259863bd | 440 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); |
e11a3d28 | 441 | cmd.cmd_version = htobe32(0); |
4a744367 JD |
442 | |
443 | memset(&rq, 0, sizeof(rq)); | |
444 | rq.session_id = htobe64(id); | |
445 | // TODO: add cmd line parameter to select seek beginning | |
446 | // rq.seek = htobe32(LTTNG_VIEWER_SEEK_BEGINNING); | |
447 | rq.seek = htobe32(LTTNG_VIEWER_SEEK_LAST); | |
448 | ||
b727abf5 JR |
449 | /* |
450 | * Merge the cmd and connection request to prevent a write-write | |
451 | * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the | |
452 | * second write to be performed quickly in presence of Nagle's algorithm. | |
453 | */ | |
454 | memcpy(cmd_buf, &cmd, sizeof(cmd)); | |
455 | memcpy(cmd_buf + sizeof(cmd), &rq, sizeof(rq)); | |
4a744367 | 456 | |
b727abf5 | 457 | ret_len = lttng_live_send(ctx->control_sock, cmd_buf, cmd_buf_len); |
4a744367 | 458 | if (ret_len < 0) { |
b727abf5 | 459 | perror("[error] Error sending attach command and request"); |
4a744367 JD |
460 | goto error; |
461 | } | |
b727abf5 | 462 | assert(ret_len == cmd_buf_len); |
4a744367 | 463 | |
b7e8a8e1 | 464 | ret_len = lttng_live_recv(ctx->control_sock, &rp, sizeof(rp)); |
f8612f31 MD |
465 | if (ret_len == 0) { |
466 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
467 | goto error; |
468 | } | |
4a744367 | 469 | if (ret_len < 0) { |
79620497 | 470 | perror("[error] Error receiving attach response"); |
4a744367 JD |
471 | goto error; |
472 | } | |
473 | assert(ret_len == sizeof(rp)); | |
474 | ||
475 | switch(be32toh(rp.status)) { | |
476 | case LTTNG_VIEWER_ATTACH_OK: | |
477 | break; | |
478 | case LTTNG_VIEWER_ATTACH_UNK: | |
479 | ret = -LTTNG_VIEWER_ATTACH_UNK; | |
480 | goto end; | |
481 | case LTTNG_VIEWER_ATTACH_ALREADY: | |
79620497 | 482 | fprintf(stderr, "[error] There is already a viewer attached to this session\n"); |
8ace20bf | 483 | goto error; |
4a744367 JD |
484 | case LTTNG_VIEWER_ATTACH_NOT_LIVE: |
485 | fprintf(stderr, "[error] Not a live session\n"); | |
8ace20bf | 486 | goto error; |
4a744367 JD |
487 | case LTTNG_VIEWER_ATTACH_SEEK_ERR: |
488 | fprintf(stderr, "[error] Wrong seek parameter\n"); | |
8ace20bf | 489 | goto error; |
4a744367 JD |
490 | default: |
491 | fprintf(stderr, "[error] Unknown attach return code %u\n", | |
492 | be32toh(rp.status)); | |
8ace20bf | 493 | goto error; |
4a744367 JD |
494 | } |
495 | if (be32toh(rp.status) != LTTNG_VIEWER_ATTACH_OK) { | |
8ace20bf | 496 | goto error; |
4a744367 JD |
497 | } |
498 | ||
2acdc547 | 499 | ctx->session->stream_count += be32toh(rp.streams_count); |
4a744367 JD |
500 | /* |
501 | * When the session is created but not started, we do an active wait | |
502 | * until it starts. It allows the viewer to start processing the trace | |
503 | * as soon as the session starts. | |
504 | */ | |
505 | if (ctx->session->stream_count == 0) { | |
506 | ret = 0; | |
507 | goto end; | |
508 | } | |
509 | printf_verbose("Waiting for %" PRIu64 " streams:\n", | |
510 | ctx->session->stream_count); | |
511 | ctx->session->streams = g_new0(struct lttng_live_viewer_stream, | |
512 | ctx->session->stream_count); | |
4a744367 | 513 | for (i = 0; i < be32toh(rp.streams_count); i++) { |
b7e8a8e1 | 514 | ret_len = lttng_live_recv(ctx->control_sock, &stream, sizeof(stream)); |
f8612f31 MD |
515 | if (ret_len == 0) { |
516 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
517 | goto error; |
518 | } | |
4a744367 | 519 | if (ret_len < 0) { |
79620497 | 520 | perror("[error] Error receiving stream"); |
4a744367 JD |
521 | goto error; |
522 | } | |
523 | assert(ret_len == sizeof(stream)); | |
9ed31e53 MD |
524 | stream.path_name[LTTNG_VIEWER_PATH_MAX - 1] = '\0'; |
525 | stream.channel_name[LTTNG_VIEWER_NAME_MAX - 1] = '\0'; | |
4a744367 JD |
526 | |
527 | printf_verbose(" stream %" PRIu64 " : %s/%s\n", | |
528 | be64toh(stream.id), stream.path_name, | |
529 | stream.channel_name); | |
530 | ctx->session->streams[i].id = be64toh(stream.id); | |
531 | ctx->session->streams[i].session = ctx->session; | |
532 | ||
4a744367 | 533 | ctx->session->streams[i].mmap_size = 0; |
fb6b45aa | 534 | ctx->session->streams[i].ctf_stream_id = -1ULL; |
4a744367 JD |
535 | |
536 | if (be32toh(stream.metadata_flag)) { | |
4a744367 | 537 | ctx->session->streams[i].metadata_flag = 1; |
4a744367 JD |
538 | } |
539 | ret = lttng_live_ctf_trace_assign(&ctx->session->streams[i], | |
540 | be64toh(stream.ctf_trace_id)); | |
541 | if (ret < 0) { | |
542 | goto error; | |
543 | } | |
544 | ||
545 | } | |
546 | ret = 0; | |
4a744367 | 547 | end: |
4a744367 | 548 | return ret; |
8ace20bf MD |
549 | |
550 | error: | |
551 | return -1; | |
4a744367 JD |
552 | } |
553 | ||
73b2b0d1 JD |
554 | /* |
555 | * Ask the relay for new streams. | |
556 | * | |
557 | * Returns the number of new streams received or a negative value on error. | |
558 | */ | |
2acdc547 JD |
559 | static |
560 | int ask_new_streams(struct lttng_live_ctx *ctx) | |
561 | { | |
73b2b0d1 | 562 | int i, ret = 0, nb_streams = 0; |
2acdc547 JD |
563 | uint64_t id; |
564 | ||
565 | restart: | |
566 | for (i = 0; i < ctx->session_ids->len; i++) { | |
567 | id = g_array_index(ctx->session_ids, uint64_t, i); | |
568 | ret = lttng_live_get_new_streams(ctx, id); | |
73b2b0d1 | 569 | printf_verbose("Asking for new streams returns %d\n", ret); |
6baf4b8e MD |
570 | if (lttng_live_should_quit()) { |
571 | ret = -1; | |
572 | goto end; | |
573 | } | |
2acdc547 JD |
574 | if (ret < 0) { |
575 | if (ret == -LTTNG_VIEWER_NEW_STREAMS_HUP) { | |
576 | printf_verbose("Session %" PRIu64 " closed\n", | |
577 | id); | |
b5a1fa45 JD |
578 | /* |
579 | * The streams have already been closed during | |
580 | * the reading, so we only need to get rid of | |
581 | * the trace in our internal table of sessions. | |
582 | */ | |
2acdc547 JD |
583 | g_array_remove_index(ctx->session_ids, i); |
584 | /* | |
585 | * We can't continue iterating on the g_array | |
586 | * after a remove, we have to start again. | |
587 | */ | |
588 | goto restart; | |
589 | } else { | |
590 | ret = -1; | |
591 | goto end; | |
592 | } | |
73b2b0d1 JD |
593 | } else { |
594 | nb_streams += ret; | |
2acdc547 JD |
595 | } |
596 | } | |
73b2b0d1 | 597 | ret = nb_streams; |
2acdc547 JD |
598 | |
599 | end: | |
600 | return ret; | |
601 | } | |
602 | ||
50d207af JD |
603 | static |
604 | int append_metadata(struct lttng_live_ctx *ctx, | |
605 | struct lttng_live_viewer_stream *viewer_stream) | |
606 | { | |
607 | int ret; | |
608 | struct lttng_live_viewer_stream *metadata; | |
609 | char *metadata_buf = NULL; | |
610 | ||
b93293f6 MD |
611 | if (!viewer_stream->ctf_trace->handle) { |
612 | printf_verbose("append_metadata: trace handle not ready yet.\n"); | |
613 | return 0; | |
614 | } | |
615 | ||
50d207af JD |
616 | printf_verbose("get_next_index: new metadata needed\n"); |
617 | ret = get_new_metadata(ctx, viewer_stream, &metadata_buf); | |
618 | if (ret < 0) { | |
619 | free(metadata_buf); | |
620 | goto error; | |
621 | } | |
622 | ||
623 | metadata = viewer_stream->ctf_trace->metadata_stream; | |
624 | metadata->ctf_trace->metadata_fp = | |
625 | babeltrace_fmemopen(metadata_buf, | |
626 | metadata->metadata_len, "rb"); | |
627 | if (!metadata->ctf_trace->metadata_fp) { | |
628 | perror("Metadata fmemopen"); | |
629 | free(metadata_buf); | |
630 | ret = -1; | |
631 | goto error; | |
632 | } | |
633 | ret = ctf_append_trace_metadata( | |
634 | viewer_stream->ctf_trace->handle->td, | |
635 | metadata->ctf_trace->metadata_fp); | |
251fc08c MD |
636 | /* We accept empty metadata packets */ |
637 | if (ret != 0 && ret != -ENOENT) { | |
50d207af JD |
638 | fprintf(stderr, "[error] Appending metadata\n"); |
639 | goto error; | |
640 | } | |
251fc08c | 641 | ret = 0; |
50d207af JD |
642 | |
643 | error: | |
644 | return ret; | |
645 | } | |
646 | ||
4a744367 JD |
647 | static |
648 | int get_data_packet(struct lttng_live_ctx *ctx, | |
649 | struct ctf_stream_pos *pos, | |
650 | struct lttng_live_viewer_stream *stream, uint64_t offset, | |
651 | uint64_t len) | |
652 | { | |
653 | struct lttng_viewer_cmd cmd; | |
654 | struct lttng_viewer_get_packet rq; | |
655 | struct lttng_viewer_trace_packet rp; | |
b727abf5 JR |
656 | const size_t cmd_buf_len = sizeof(cmd) + sizeof(rq); |
657 | char cmd_buf[cmd_buf_len]; | |
4a744367 JD |
658 | ssize_t ret_len; |
659 | int ret; | |
660 | ||
50d207af | 661 | retry: |
8ace20bf MD |
662 | if (lttng_live_should_quit()) { |
663 | ret = -1; | |
664 | goto end; | |
665 | } | |
857eaa68 | 666 | |
4a744367 | 667 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_PACKET); |
259863bd | 668 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); |
e11a3d28 | 669 | cmd.cmd_version = htobe32(0); |
4a744367 JD |
670 | |
671 | memset(&rq, 0, sizeof(rq)); | |
672 | rq.stream_id = htobe64(stream->id); | |
c1e8ac81 | 673 | rq.offset = htobe64(offset); |
4a744367 JD |
674 | rq.len = htobe32(len); |
675 | ||
b727abf5 JR |
676 | /* |
677 | * Merge the cmd and connection request to prevent a write-write | |
678 | * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the | |
679 | * second write to be performed quickly in presence of Nagle's algorithm. | |
680 | */ | |
681 | memcpy(cmd_buf, &cmd, sizeof(cmd)); | |
682 | memcpy(cmd_buf + sizeof(cmd), &rq, sizeof(rq)); | |
4a744367 | 683 | |
b727abf5 | 684 | ret_len = lttng_live_send(ctx->control_sock, cmd_buf, cmd_buf_len); |
4a744367 | 685 | if (ret_len < 0) { |
b727abf5 | 686 | perror("[error] Error sending get_data_packet cmd and request"); |
4a744367 JD |
687 | goto error; |
688 | } | |
b727abf5 | 689 | assert(ret_len == cmd_buf_len); |
4a744367 | 690 | |
b7e8a8e1 | 691 | ret_len = lttng_live_recv(ctx->control_sock, &rp, sizeof(rp)); |
f8612f31 MD |
692 | if (ret_len == 0) { |
693 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
694 | goto error; |
695 | } | |
4a744367 | 696 | if (ret_len < 0) { |
79620497 | 697 | perror("[error] Error receiving data response"); |
4a744367 JD |
698 | goto error; |
699 | } | |
57b9d843 | 700 | if (ret_len != sizeof(rp)) { |
7e5e4176 MD |
701 | fprintf(stderr, "[error] get_data_packet: expected %zu" |
702 | ", received %zd\n", sizeof(rp), | |
a5e4b11e | 703 | ret_len); |
57b9d843 JD |
704 | goto error; |
705 | } | |
4a744367 JD |
706 | |
707 | rp.flags = be32toh(rp.flags); | |
708 | ||
709 | switch (be32toh(rp.status)) { | |
710 | case LTTNG_VIEWER_GET_PACKET_OK: | |
711 | len = be32toh(rp.len); | |
712 | printf_verbose("get_data_packet: Ok, packet size : %" PRIu64 | |
713 | "\n", len); | |
714 | break; | |
715 | case LTTNG_VIEWER_GET_PACKET_RETRY: | |
8ace20bf | 716 | /* Unimplemented by relay daemon */ |
4a744367 | 717 | printf_verbose("get_data_packet: retry\n"); |
8ace20bf | 718 | goto error; |
4a744367 JD |
719 | case LTTNG_VIEWER_GET_PACKET_ERR: |
720 | if (rp.flags & LTTNG_VIEWER_FLAG_NEW_METADATA) { | |
721 | printf_verbose("get_data_packet: new metadata needed\n"); | |
50d207af JD |
722 | ret = append_metadata(ctx, stream); |
723 | if (ret) | |
724 | goto error; | |
4a744367 | 725 | } |
2acdc547 | 726 | if (rp.flags & LTTNG_VIEWER_FLAG_NEW_STREAM) { |
f312b3aa | 727 | printf_verbose("get_data_packet: new streams needed\n"); |
2acdc547 | 728 | ret = ask_new_streams(ctx); |
7840bb08 | 729 | if (ret < 0) { |
2acdc547 | 730 | goto error; |
7840bb08 JD |
731 | } else if (ret > 0) { |
732 | ret = add_traces(ctx); | |
733 | if (ret < 0) { | |
734 | goto error; | |
735 | } | |
736 | } | |
2acdc547 | 737 | } |
f312b3aa MD |
738 | if (rp.flags & (LTTNG_VIEWER_FLAG_NEW_METADATA |
739 | | LTTNG_VIEWER_FLAG_NEW_STREAM)) { | |
740 | goto retry; | |
741 | } | |
4a744367 | 742 | fprintf(stderr, "[error] get_data_packet: error\n"); |
8ace20bf | 743 | goto error; |
4a744367 JD |
744 | case LTTNG_VIEWER_GET_PACKET_EOF: |
745 | ret = -2; | |
8ace20bf | 746 | goto end; |
4a744367 JD |
747 | default: |
748 | printf_verbose("get_data_packet: unknown\n"); | |
8ace20bf | 749 | goto error; |
4a744367 JD |
750 | } |
751 | ||
65ae9a82 | 752 | if (len == 0) { |
96943040 | 753 | goto error; |
4a744367 JD |
754 | } |
755 | ||
756 | if (len > stream->mmap_size) { | |
757 | uint64_t new_size; | |
758 | ||
759 | new_size = max_t(uint64_t, len, stream->mmap_size << 1); | |
760 | if (pos->base_mma) { | |
761 | /* unmap old base */ | |
762 | ret = munmap_align(pos->base_mma); | |
763 | if (ret) { | |
79620497 | 764 | perror("[error] Unable to unmap old base"); |
4a744367 JD |
765 | goto error; |
766 | } | |
767 | pos->base_mma = NULL; | |
768 | } | |
769 | pos->base_mma = mmap_align(new_size, | |
770 | PROT_READ | PROT_WRITE, | |
771 | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); | |
772 | if (pos->base_mma == MAP_FAILED) { | |
79620497 | 773 | perror("[error] mmap error"); |
4a744367 | 774 | pos->base_mma = NULL; |
4a744367 JD |
775 | goto error; |
776 | } | |
777 | ||
778 | stream->mmap_size = new_size; | |
779 | printf_verbose("Expanding stream mmap size to %" PRIu64 " bytes\n", | |
780 | stream->mmap_size); | |
781 | } | |
782 | ||
b7e8a8e1 MD |
783 | ret_len = lttng_live_recv(ctx->control_sock, |
784 | mmap_align_addr(pos->base_mma), len); | |
f8612f31 MD |
785 | if (ret_len == 0) { |
786 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
787 | goto error; |
788 | } | |
4a744367 | 789 | if (ret_len < 0) { |
79620497 | 790 | perror("[error] Error receiving trace packet"); |
4a744367 JD |
791 | goto error; |
792 | } | |
793 | assert(ret_len == len); | |
f312b3aa | 794 | ret = 0; |
4a744367 | 795 | end: |
4a744367 | 796 | return ret; |
8ace20bf MD |
797 | |
798 | error: | |
799 | return -1; | |
4a744367 JD |
800 | } |
801 | ||
4a744367 | 802 | static |
9abca178 JD |
803 | int get_one_metadata_packet(struct lttng_live_ctx *ctx, |
804 | struct lttng_live_viewer_stream *metadata_stream) | |
4a744367 JD |
805 | { |
806 | uint64_t len = 0; | |
807 | int ret; | |
808 | struct lttng_viewer_cmd cmd; | |
809 | struct lttng_viewer_get_metadata rq; | |
810 | struct lttng_viewer_metadata_packet rp; | |
4a744367 JD |
811 | char *data = NULL; |
812 | ssize_t ret_len; | |
b727abf5 JR |
813 | const size_t cmd_buf_len = sizeof(cmd) + sizeof(rq); |
814 | char cmd_buf[cmd_buf_len]; | |
4a744367 | 815 | |
8ace20bf MD |
816 | if (lttng_live_should_quit()) { |
817 | ret = -1; | |
818 | goto end; | |
819 | } | |
820 | ||
9abca178 | 821 | rq.stream_id = htobe64(metadata_stream->id); |
4a744367 | 822 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_METADATA); |
259863bd | 823 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); |
e11a3d28 | 824 | cmd.cmd_version = htobe32(0); |
4a744367 | 825 | |
b727abf5 JR |
826 | /* |
827 | * Merge the cmd and connection request to prevent a write-write | |
828 | * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the | |
829 | * second write to be performed quickly in presence of Nagle's algorithm. | |
830 | */ | |
831 | memcpy(cmd_buf, &cmd, sizeof(cmd)); | |
832 | memcpy(cmd_buf + sizeof(cmd), &rq, sizeof(rq)); | |
4a744367 | 833 | |
b727abf5 | 834 | ret_len = lttng_live_send(ctx->control_sock, cmd_buf, cmd_buf_len); |
4a744367 | 835 | if (ret_len < 0) { |
b727abf5 | 836 | perror("[error] Error sending get_metadata cmd and request"); |
4a744367 JD |
837 | goto error; |
838 | } | |
b727abf5 | 839 | assert(ret_len == cmd_buf_len); |
4a744367 | 840 | |
b7e8a8e1 | 841 | ret_len = lttng_live_recv(ctx->control_sock, &rp, sizeof(rp)); |
f8612f31 MD |
842 | if (ret_len == 0) { |
843 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
844 | goto error; |
845 | } | |
4a744367 | 846 | if (ret_len < 0) { |
79620497 | 847 | perror("[error] Error receiving metadata response"); |
4a744367 JD |
848 | goto error; |
849 | } | |
850 | assert(ret_len == sizeof(rp)); | |
851 | ||
852 | switch (be32toh(rp.status)) { | |
853 | case LTTNG_VIEWER_METADATA_OK: | |
854 | printf_verbose("get_metadata : OK\n"); | |
855 | break; | |
856 | case LTTNG_VIEWER_NO_NEW_METADATA: | |
857 | printf_verbose("get_metadata : NO NEW\n"); | |
9abca178 | 858 | ret = 0; |
4a744367 JD |
859 | goto end; |
860 | case LTTNG_VIEWER_METADATA_ERR: | |
861 | printf_verbose("get_metadata : ERR\n"); | |
8ace20bf | 862 | goto error; |
4a744367 JD |
863 | default: |
864 | printf_verbose("get_metadata : UNKNOWN\n"); | |
8ace20bf | 865 | goto error; |
4a744367 JD |
866 | } |
867 | ||
868 | len = be64toh(rp.len); | |
869 | printf_verbose("Writing %" PRIu64" bytes to metadata\n", len); | |
870 | if (len <= 0) { | |
8ace20bf | 871 | goto error; |
4a744367 JD |
872 | } |
873 | ||
874 | data = zmalloc(len); | |
875 | if (!data) { | |
876 | perror("relay data zmalloc"); | |
4a744367 JD |
877 | goto error; |
878 | } | |
b7e8a8e1 | 879 | ret_len = lttng_live_recv(ctx->control_sock, data, len); |
f8612f31 MD |
880 | if (ret_len == 0) { |
881 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
8ace20bf | 882 | goto error_free_data; |
f8612f31 | 883 | } |
4a744367 | 884 | if (ret_len < 0) { |
79620497 | 885 | perror("[error] Error receiving trace packet"); |
8ace20bf | 886 | goto error_free_data; |
4a744367 JD |
887 | } |
888 | assert(ret_len == len); | |
889 | ||
890 | do { | |
af701dc4 JD |
891 | ret_len = fwrite(data, 1, len, |
892 | metadata_stream->metadata_fp_write); | |
4a744367 JD |
893 | } while (ret_len < 0 && errno == EINTR); |
894 | if (ret_len < 0) { | |
af701dc4 | 895 | fprintf(stderr, "[error] Writing in the metadata fp\n"); |
8ace20bf | 896 | goto error_free_data; |
4a744367 JD |
897 | } |
898 | assert(ret_len == len); | |
af701dc4 | 899 | metadata_stream->metadata_len += len; |
8ace20bf | 900 | free(data); |
9abca178 | 901 | ret = len; |
8ace20bf MD |
902 | end: |
903 | return ret; | |
4a744367 | 904 | |
8ace20bf | 905 | error_free_data: |
4a744367 | 906 | free(data); |
4a744367 | 907 | error: |
8ace20bf | 908 | return -1; |
4a744367 JD |
909 | } |
910 | ||
9abca178 JD |
911 | /* |
912 | * Return 0 on success, a negative value on error. | |
913 | */ | |
914 | static | |
915 | int get_new_metadata(struct lttng_live_ctx *ctx, | |
af701dc4 JD |
916 | struct lttng_live_viewer_stream *viewer_stream, |
917 | char **metadata_buf) | |
9abca178 JD |
918 | { |
919 | int ret = 0; | |
920 | struct lttng_live_viewer_stream *metadata_stream; | |
73b2b0d1 | 921 | size_t size, len_read = 0; |
9abca178 JD |
922 | |
923 | metadata_stream = viewer_stream->ctf_trace->metadata_stream; | |
50d207af JD |
924 | if (!metadata_stream) { |
925 | fprintf(stderr, "[error] No metadata stream\n"); | |
926 | ret = -1; | |
927 | goto error; | |
928 | } | |
af701dc4 JD |
929 | metadata_stream->metadata_len = 0; |
930 | ret = open_metadata_fp_write(metadata_stream, metadata_buf, &size); | |
931 | if (ret < 0) { | |
932 | goto error; | |
933 | } | |
9abca178 JD |
934 | |
935 | do { | |
d1694e41 JD |
936 | if (lttng_live_should_quit()) { |
937 | ret = -1; | |
938 | goto error; | |
939 | } | |
9abca178 JD |
940 | /* |
941 | * get_one_metadata_packet returns the number of bytes | |
942 | * received, 0 when we have received everything, a | |
943 | * negative value on error. | |
944 | */ | |
945 | ret = get_one_metadata_packet(ctx, metadata_stream); | |
c111d5d7 MD |
946 | if (ret > 0) { |
947 | len_read += ret; | |
948 | } | |
85e2085e MD |
949 | if (!len_read) { |
950 | (void) poll(NULL, 0, ACTIVE_POLL_DELAY); | |
951 | } | |
c111d5d7 | 952 | } while (ret > 0 || !len_read); |
9abca178 | 953 | |
91bb0024 MD |
954 | if (babeltrace_close_memstream(metadata_buf, &size, |
955 | metadata_stream->metadata_fp_write)) { | |
956 | perror("babeltrace_close_memstream"); | |
957 | } | |
af701dc4 JD |
958 | metadata_stream->metadata_fp_write = NULL; |
959 | ||
960 | error: | |
9abca178 JD |
961 | return ret; |
962 | } | |
963 | ||
fb6b45aa JD |
964 | /* |
965 | * Assign the fields from a lttng_viewer_index to a packet_index. | |
966 | */ | |
967 | static | |
968 | void lttng_index_to_packet_index(struct lttng_viewer_index *lindex, | |
969 | struct packet_index *pindex) | |
970 | { | |
971 | assert(lindex); | |
972 | assert(pindex); | |
973 | ||
974 | pindex->offset = be64toh(lindex->offset); | |
975 | pindex->packet_size = be64toh(lindex->packet_size); | |
976 | pindex->content_size = be64toh(lindex->content_size); | |
977 | pindex->ts_cycles.timestamp_begin = be64toh(lindex->timestamp_begin); | |
978 | pindex->ts_cycles.timestamp_end = be64toh(lindex->timestamp_end); | |
979 | pindex->events_discarded = be64toh(lindex->events_discarded); | |
980 | } | |
981 | ||
4a744367 JD |
982 | /* |
983 | * Get one index for a stream. | |
984 | * | |
985 | * Returns 0 on success or a negative value on error. | |
986 | */ | |
987 | static | |
988 | int get_next_index(struct lttng_live_ctx *ctx, | |
989 | struct lttng_live_viewer_stream *viewer_stream, | |
fb6b45aa | 990 | struct packet_index *index, uint64_t *stream_id) |
4a744367 JD |
991 | { |
992 | struct lttng_viewer_cmd cmd; | |
993 | struct lttng_viewer_get_next_index rq; | |
4a744367 | 994 | int ret; |
4a744367 | 995 | ssize_t ret_len; |
fb6b45aa | 996 | struct lttng_viewer_index *rp = &viewer_stream->current_index; |
b727abf5 JR |
997 | const size_t cmd_buf_len = sizeof(cmd) + sizeof(rq); |
998 | char cmd_buf[cmd_buf_len]; | |
4a744367 JD |
999 | |
1000 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_NEXT_INDEX); | |
259863bd | 1001 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); |
e11a3d28 | 1002 | cmd.cmd_version = htobe32(0); |
4a744367 JD |
1003 | |
1004 | memset(&rq, 0, sizeof(rq)); | |
1005 | rq.stream_id = htobe64(viewer_stream->id); | |
1006 | ||
b727abf5 JR |
1007 | /* |
1008 | * Merge the cmd and connection request to prevent a write-write | |
1009 | * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the | |
1010 | * second write to be performed quickly in presence of Nagle's algorithm. | |
1011 | */ | |
1012 | memcpy(cmd_buf, &cmd, sizeof(cmd)); | |
1013 | memcpy(cmd_buf + sizeof(cmd), &rq, sizeof(rq)); | |
4a744367 | 1014 | retry: |
8ace20bf MD |
1015 | if (lttng_live_should_quit()) { |
1016 | ret = -1; | |
1017 | goto end; | |
1018 | } | |
b727abf5 | 1019 | ret_len = lttng_live_send(ctx->control_sock, &cmd_buf, cmd_buf_len); |
4a744367 | 1020 | if (ret_len < 0) { |
b727abf5 | 1021 | perror("[error] Error sending get_next_index cmd and request"); |
4a744367 JD |
1022 | goto error; |
1023 | } | |
b727abf5 | 1024 | assert(ret_len == cmd_buf_len); |
4a744367 | 1025 | |
fb6b45aa | 1026 | ret_len = lttng_live_recv(ctx->control_sock, rp, sizeof(*rp)); |
f8612f31 MD |
1027 | if (ret_len == 0) { |
1028 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
1029 | goto error; |
1030 | } | |
4a744367 | 1031 | if (ret_len < 0) { |
79620497 | 1032 | perror("[error] Error receiving index response"); |
4a744367 JD |
1033 | goto error; |
1034 | } | |
fb6b45aa | 1035 | assert(ret_len == sizeof(*rp)); |
4a744367 | 1036 | |
fb6b45aa | 1037 | rp->flags = be32toh(rp->flags); |
4a744367 | 1038 | |
fb6b45aa | 1039 | switch (be32toh(rp->status)) { |
4a744367 JD |
1040 | case LTTNG_VIEWER_INDEX_INACTIVE: |
1041 | printf_verbose("get_next_index: inactive\n"); | |
ad5c40d0 JR |
1042 | |
1043 | if (index->ts_cycles.timestamp_end == | |
1044 | be64toh(rp->timestamp_end)) { | |
1045 | /* Already seen this timestamp. */ | |
1046 | (void) poll(NULL, 0, ACTIVE_POLL_DELAY); | |
1047 | } | |
1048 | ||
4a744367 | 1049 | memset(index, 0, sizeof(struct packet_index)); |
fb6b45aa JD |
1050 | index->ts_cycles.timestamp_end = be64toh(rp->timestamp_end); |
1051 | *stream_id = be64toh(rp->stream_id); | |
4a744367 JD |
1052 | break; |
1053 | case LTTNG_VIEWER_INDEX_OK: | |
1054 | printf_verbose("get_next_index: Ok, need metadata update : %u\n", | |
fb6b45aa JD |
1055 | rp->flags & LTTNG_VIEWER_FLAG_NEW_METADATA); |
1056 | lttng_index_to_packet_index(rp, index); | |
1057 | *stream_id = be64toh(rp->stream_id); | |
1058 | viewer_stream->data_pending = 1; | |
4a744367 | 1059 | |
fb6b45aa | 1060 | if (rp->flags & LTTNG_VIEWER_FLAG_NEW_METADATA) { |
50d207af JD |
1061 | ret = append_metadata(ctx, viewer_stream); |
1062 | if (ret) | |
4a744367 | 1063 | goto error; |
4a744367 | 1064 | } |
fb6b45aa | 1065 | if (rp->flags & LTTNG_VIEWER_FLAG_NEW_STREAM) { |
73b2b0d1 | 1066 | printf_verbose("get_next_index: need new streams\n"); |
2acdc547 | 1067 | ret = ask_new_streams(ctx); |
7840bb08 | 1068 | if (ret < 0) { |
2acdc547 | 1069 | goto error; |
7840bb08 JD |
1070 | } else if (ret > 0) { |
1071 | ret = add_traces(ctx); | |
1072 | if (ret < 0) { | |
1073 | goto error; | |
1074 | } | |
1075 | } | |
2acdc547 | 1076 | } |
4a744367 JD |
1077 | break; |
1078 | case LTTNG_VIEWER_INDEX_RETRY: | |
1079 | printf_verbose("get_next_index: retry\n"); | |
85e2085e | 1080 | (void) poll(NULL, 0, ACTIVE_POLL_DELAY); |
4a744367 JD |
1081 | goto retry; |
1082 | case LTTNG_VIEWER_INDEX_HUP: | |
1083 | printf_verbose("get_next_index: stream hung up\n"); | |
1084 | viewer_stream->id = -1ULL; | |
4a744367 | 1085 | index->offset = EOF; |
2acdc547 | 1086 | ctx->session->stream_count--; |
4a744367 JD |
1087 | break; |
1088 | case LTTNG_VIEWER_INDEX_ERR: | |
1089 | fprintf(stderr, "[error] get_next_index: error\n"); | |
4a744367 JD |
1090 | goto error; |
1091 | default: | |
1092 | fprintf(stderr, "[error] get_next_index: unkwown value\n"); | |
4a744367 JD |
1093 | goto error; |
1094 | } | |
4a744367 | 1095 | ret = 0; |
8ace20bf MD |
1096 | end: |
1097 | return ret; | |
4a744367 JD |
1098 | |
1099 | error: | |
8ace20bf | 1100 | return -1; |
4a744367 JD |
1101 | } |
1102 | ||
fb6b45aa JD |
1103 | static |
1104 | void read_packet_header(struct ctf_stream_pos *pos, | |
1105 | struct ctf_file_stream *file_stream) | |
1106 | { | |
1107 | int ret; | |
1108 | ||
1109 | /* update trace_packet_header and stream_packet_context */ | |
fcf10417 JG |
1110 | if (!(pos->prot & PROT_WRITE) && |
1111 | file_stream->parent.trace_packet_header) { | |
fb6b45aa JD |
1112 | /* Read packet header */ |
1113 | ret = generic_rw(&pos->parent, | |
1114 | &file_stream->parent.trace_packet_header->p); | |
1115 | if (ret) { | |
1116 | pos->offset = EOF; | |
1117 | fprintf(stderr, "[error] trace packet " | |
1118 | "header read failed\n"); | |
1119 | goto end; | |
1120 | } | |
1121 | } | |
fcf10417 JG |
1122 | if (!(pos->prot & PROT_WRITE) && |
1123 | file_stream->parent.stream_packet_context) { | |
fb6b45aa JD |
1124 | /* Read packet context */ |
1125 | ret = generic_rw(&pos->parent, | |
1126 | &file_stream->parent.stream_packet_context->p); | |
1127 | if (ret) { | |
1128 | pos->offset = EOF; | |
1129 | fprintf(stderr, "[error] stream packet " | |
1130 | "context read failed\n"); | |
1131 | goto end; | |
1132 | } | |
1133 | } | |
1134 | pos->data_offset = pos->offset; | |
1135 | ||
1136 | end: | |
1137 | return; | |
1138 | } | |
1139 | ||
1140 | /* | |
1141 | * Handle the seek parameters. | |
1142 | * Returns 0 if the packet_seek can continue, a positive value to | |
1143 | * cleanly exit the packet_seek, a negative value on error. | |
1144 | */ | |
1145 | static | |
1146 | int handle_seek_position(size_t index, int whence, | |
1147 | struct lttng_live_viewer_stream *viewer_stream, | |
1148 | struct ctf_stream_pos *pos, | |
1149 | struct ctf_file_stream *file_stream) | |
1150 | { | |
6a724a1e | 1151 | int ret = 0; |
fb6b45aa JD |
1152 | |
1153 | switch (whence) { | |
1154 | case SEEK_CUR: | |
1155 | ret = 0; | |
1156 | goto end; | |
1157 | case SEEK_SET: | |
1158 | /* | |
1159 | * We only allow to seek to 0. | |
1160 | */ | |
1161 | if (index != 0) { | |
1162 | fprintf(stderr, "[error] Arbitrary seek in lttng-live " | |
1163 | "trace not supported\n"); | |
1164 | pos->offset = EOF; | |
1165 | ret = -1; | |
1166 | goto end; | |
1167 | } | |
1168 | ||
1169 | ret = 0; | |
1170 | goto end; | |
1171 | ||
1172 | default: | |
1173 | fprintf(stderr, "[error] Invalid seek parameter\n"); | |
1174 | assert(0); | |
1175 | } | |
1176 | ||
1177 | end: | |
1178 | return ret; | |
1179 | } | |
1180 | ||
b5a1fa45 | 1181 | static |
4a744367 JD |
1182 | void ctf_live_packet_seek(struct bt_stream_pos *stream_pos, size_t index, |
1183 | int whence) | |
1184 | { | |
1185 | struct ctf_stream_pos *pos; | |
1186 | struct ctf_file_stream *file_stream; | |
f1f52630 | 1187 | struct packet_index *prev_index = NULL, *cur_index; |
4a744367 JD |
1188 | struct lttng_live_viewer_stream *viewer_stream; |
1189 | struct lttng_live_session *session; | |
fb6b45aa | 1190 | uint64_t stream_id = -1ULL; |
4a744367 JD |
1191 | int ret; |
1192 | ||
4a744367 JD |
1193 | pos = ctf_pos(stream_pos); |
1194 | file_stream = container_of(pos, struct ctf_file_stream, pos); | |
1195 | viewer_stream = (struct lttng_live_viewer_stream *) pos->priv; | |
1196 | session = viewer_stream->session; | |
1197 | ||
fb6b45aa JD |
1198 | ret = handle_seek_position(index, whence, viewer_stream, pos, |
1199 | file_stream); | |
1200 | if (ret != 0) { | |
1201 | return; | |
1202 | } | |
1203 | ||
1204 | retry: | |
f1f52630 MD |
1205 | switch (pos->packet_index->len) { |
1206 | case 0: | |
1207 | g_array_set_size(pos->packet_index, 1); | |
1208 | cur_index = &g_array_index(pos->packet_index, | |
1209 | struct packet_index, 0); | |
1210 | break; | |
1211 | case 1: | |
1212 | g_array_set_size(pos->packet_index, 2); | |
1213 | prev_index = &g_array_index(pos->packet_index, | |
1214 | struct packet_index, 0); | |
1215 | cur_index = &g_array_index(pos->packet_index, | |
1216 | struct packet_index, 1); | |
1217 | break; | |
1218 | case 2: | |
1219 | g_array_index(pos->packet_index, | |
1220 | struct packet_index, 0) = | |
1221 | g_array_index(pos->packet_index, | |
1222 | struct packet_index, 1); | |
1223 | prev_index = &g_array_index(pos->packet_index, | |
1224 | struct packet_index, 0); | |
1225 | cur_index = &g_array_index(pos->packet_index, | |
1226 | struct packet_index, 1); | |
1227 | break; | |
1228 | default: | |
1229 | abort(); | |
1230 | break; | |
1231 | } | |
fb6b45aa JD |
1232 | |
1233 | if (viewer_stream->data_pending) { | |
1234 | lttng_index_to_packet_index(&viewer_stream->current_index, cur_index); | |
1235 | } else { | |
1236 | printf_verbose("get_next_index for stream %" PRIu64 "\n", viewer_stream->id); | |
1237 | ret = get_next_index(session->ctx, viewer_stream, cur_index, &stream_id); | |
1238 | if (ret < 0) { | |
1239 | pos->offset = EOF; | |
1240 | if (!lttng_live_should_quit()) { | |
1241 | fprintf(stderr, "[error] get_next_index failed\n"); | |
1242 | } | |
1243 | return; | |
e29395a8 | 1244 | } |
fb6b45aa JD |
1245 | printf_verbose("Index received : packet_size : %" PRIu64 |
1246 | ", offset %" PRIu64 ", content_size %" PRIu64 | |
1247 | ", timestamp_end : %" PRIu64 "\n", | |
1248 | cur_index->packet_size, cur_index->offset, | |
1249 | cur_index->content_size, | |
1250 | cur_index->ts_cycles.timestamp_end); | |
1251 | ||
1252 | } | |
1253 | ||
1254 | /* | |
1255 | * On the first time we receive an index, the stream_id needs to | |
1256 | * be set for the stream in order to use it, we don't want any | |
1257 | * data at this stage. | |
1258 | */ | |
1259 | if (file_stream->parent.stream_id == -1ULL) { | |
1260 | /* | |
1261 | * Warning: with lttng-tools < 2.4.2, the beacon does not | |
1262 | * contain the real stream ID, it is memset to 0, so this | |
1263 | * might create a problem when a session has multiple | |
1264 | * channels. We can't detect it at this stage, lttng-tools | |
1265 | * has to be upgraded to fix this problem. | |
1266 | */ | |
1267 | printf_verbose("Assigning stream_id %" PRIu64 "\n", | |
1268 | stream_id); | |
1269 | file_stream->parent.stream_id = stream_id; | |
1270 | viewer_stream->ctf_stream_id = stream_id; | |
1271 | ||
4a744367 JD |
1272 | return; |
1273 | } | |
1274 | ||
f1f52630 MD |
1275 | pos->packet_size = cur_index->packet_size; |
1276 | pos->content_size = cur_index->content_size; | |
4a744367 | 1277 | pos->mmap_base_offset = 0; |
f1f52630 | 1278 | if (cur_index->offset == EOF) { |
4a744367 JD |
1279 | pos->offset = EOF; |
1280 | } else { | |
1281 | pos->offset = 0; | |
1282 | } | |
1283 | ||
f1f52630 | 1284 | if (cur_index->content_size == 0) { |
c0bed139 | 1285 | /* Beacon packet index */ |
fb6b45aa JD |
1286 | if (file_stream->parent.stream_class) { |
1287 | file_stream->parent.cycles_timestamp = | |
f1f52630 | 1288 | cur_index->ts_cycles.timestamp_end; |
fb6b45aa JD |
1289 | file_stream->parent.real_timestamp = ctf_get_real_timestamp( |
1290 | &file_stream->parent, | |
1291 | cur_index->ts_cycles.timestamp_end); | |
c0bed139 JD |
1292 | |
1293 | /* | |
1294 | * Duplicate the data from the previous index, because | |
1295 | * the one we just received is only a beacon with no | |
1296 | * relevant information except the timestamp_end. We | |
1297 | * don't need to keep this timestamp_end because we already | |
1298 | * updated the file_stream timestamps, so we only need | |
1299 | * to keep the last real index data as prev_index. That | |
1300 | * way, we keep the original prev timestamps and | |
1301 | * discarded events counter. This is the same behaviour | |
1302 | * as if we were reading a local trace, we would not | |
1303 | * have fake indexes between real indexes. | |
1304 | */ | |
1305 | memcpy(cur_index, prev_index, sizeof(struct packet_index)); | |
fb6b45aa | 1306 | } |
4a744367 | 1307 | } else { |
c0bed139 | 1308 | /* Real packet index */ |
fb6b45aa JD |
1309 | if (file_stream->parent.stream_class) { |
1310 | /* Convert the timestamps and append to the real_index. */ | |
1311 | cur_index->ts_real.timestamp_begin = ctf_get_real_timestamp( | |
1312 | &file_stream->parent, | |
1313 | cur_index->ts_cycles.timestamp_begin); | |
1314 | cur_index->ts_real.timestamp_end = ctf_get_real_timestamp( | |
1315 | &file_stream->parent, | |
1316 | cur_index->ts_cycles.timestamp_end); | |
1317 | } | |
f1f52630 MD |
1318 | |
1319 | ctf_update_current_packet_index(&file_stream->parent, | |
1320 | prev_index, cur_index); | |
1321 | ||
7371a182 MD |
1322 | /* |
1323 | * We need to check if we are in trace read or called | |
1324 | * from packet indexing. In this last case, the | |
1325 | * collection is not there, so we cannot print the | |
1326 | * timestamps. | |
1327 | */ | |
1328 | if ((&file_stream->parent)->stream_class->trace->parent.collection) { | |
1329 | ctf_print_discarded_lost(stderr, &file_stream->parent); | |
1330 | } | |
1331 | ||
f1f52630 MD |
1332 | file_stream->parent.cycles_timestamp = |
1333 | cur_index->ts_cycles.timestamp_begin; | |
1334 | file_stream->parent.real_timestamp = | |
1335 | cur_index->ts_real.timestamp_begin; | |
4a744367 JD |
1336 | } |
1337 | ||
8dcb4e83 JG |
1338 | /* |
1339 | * Flush the output between attempts to grab a packet, thus | |
1340 | * ensuring we flush at least at the periodical timer period. | |
1341 | * This ensures the output remains reactive for interactive users and | |
1342 | * that the output is flushed when redirected to a file by the shell. | |
1343 | */ | |
1344 | if (fflush(LTTNG_LIVE_OUTPUT_FP) < 0) { | |
1345 | perror("fflush"); | |
1346 | goto end; | |
1347 | } | |
1348 | ||
4a744367 JD |
1349 | if (pos->packet_size == 0 || pos->offset == EOF) { |
1350 | goto end; | |
1351 | } | |
1352 | ||
1353 | printf_verbose("get_data_packet for stream %" PRIu64 "\n", | |
1354 | viewer_stream->id); | |
1355 | ret = get_data_packet(session->ctx, pos, viewer_stream, | |
c1e8ac81 | 1356 | cur_index->offset, |
f1f52630 | 1357 | cur_index->packet_size / CHAR_BIT); |
4a744367 JD |
1358 | if (ret == -2) { |
1359 | goto retry; | |
1360 | } else if (ret < 0) { | |
1361 | pos->offset = EOF; | |
e29395a8 JG |
1362 | if (!lttng_live_should_quit()) { |
1363 | fprintf(stderr, "[error] get_data_packet failed\n"); | |
1364 | } | |
4a744367 JD |
1365 | return; |
1366 | } | |
fb6b45aa | 1367 | viewer_stream->data_pending = 0; |
4a744367 | 1368 | |
fb6b45aa | 1369 | read_packet_header(pos, file_stream); |
4a744367 JD |
1370 | |
1371 | end: | |
1372 | return; | |
1373 | } | |
1374 | ||
2acdc547 JD |
1375 | int lttng_live_create_viewer_session(struct lttng_live_ctx *ctx) |
1376 | { | |
1377 | struct lttng_viewer_cmd cmd; | |
1378 | struct lttng_viewer_create_session_response resp; | |
1379 | int ret; | |
1380 | ssize_t ret_len; | |
1381 | ||
8ace20bf MD |
1382 | if (lttng_live_should_quit()) { |
1383 | ret = -1; | |
1384 | goto end; | |
1385 | } | |
1386 | ||
2acdc547 | 1387 | cmd.cmd = htobe32(LTTNG_VIEWER_CREATE_SESSION); |
259863bd | 1388 | cmd.data_size = htobe64((uint64_t) 0); |
e11a3d28 | 1389 | cmd.cmd_version = htobe32(0); |
2acdc547 | 1390 | |
b7e8a8e1 | 1391 | ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd)); |
2acdc547 | 1392 | if (ret_len < 0) { |
79620497 | 1393 | perror("[error] Error sending cmd"); |
2acdc547 JD |
1394 | goto error; |
1395 | } | |
1396 | assert(ret_len == sizeof(cmd)); | |
1397 | ||
b7e8a8e1 | 1398 | ret_len = lttng_live_recv(ctx->control_sock, &resp, sizeof(resp)); |
f8612f31 MD |
1399 | if (ret_len == 0) { |
1400 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
1401 | goto error; |
1402 | } | |
2acdc547 | 1403 | if (ret_len < 0) { |
79620497 | 1404 | perror("[error] Error receiving create session reply"); |
2acdc547 JD |
1405 | goto error; |
1406 | } | |
1407 | assert(ret_len == sizeof(resp)); | |
1408 | ||
1409 | if (be32toh(resp.status) != LTTNG_VIEWER_CREATE_SESSION_OK) { | |
1410 | fprintf(stderr, "[error] Error creating viewer session\n"); | |
2acdc547 JD |
1411 | goto error; |
1412 | } | |
1413 | ret = 0; | |
8ace20bf MD |
1414 | end: |
1415 | return ret; | |
2acdc547 JD |
1416 | |
1417 | error: | |
8ace20bf | 1418 | return -1; |
2acdc547 JD |
1419 | } |
1420 | ||
1421 | static | |
1422 | int del_traces(gpointer key, gpointer value, gpointer user_data) | |
4a744367 JD |
1423 | { |
1424 | struct bt_context *bt_ctx = user_data; | |
1425 | struct lttng_live_ctf_trace *trace = value; | |
1426 | int ret; | |
1427 | ||
1428 | ret = bt_context_remove_trace(bt_ctx, trace->trace_id); | |
1429 | if (ret < 0) | |
1430 | fprintf(stderr, "[error] removing trace from context\n"); | |
1431 | ||
1432 | /* remove the key/value pair from the HT. */ | |
1433 | return 1; | |
1434 | } | |
1435 | ||
2acdc547 | 1436 | static |
7840bb08 JD |
1437 | int add_one_trace(struct lttng_live_ctx *ctx, |
1438 | struct lttng_live_ctf_trace *trace) | |
4a744367 | 1439 | { |
9abca178 | 1440 | int i, ret; |
7840bb08 | 1441 | struct bt_context *bt_ctx = ctx->bt_ctx; |
4a744367 JD |
1442 | struct lttng_live_viewer_stream *stream; |
1443 | struct bt_mmap_stream *new_mmap_stream; | |
1444 | struct bt_mmap_stream_list mmap_list; | |
150595c4 JD |
1445 | struct bt_trace_descriptor *td; |
1446 | struct bt_trace_handle *handle; | |
4a744367 | 1447 | |
b5a1fa45 JD |
1448 | /* |
1449 | * We don't know how many streams we will receive for a trace, so | |
1450 | * once we are done receiving the traces, we add all the traces | |
1451 | * received to the bt_context. | |
1452 | * We can receive streams during the attach command or the | |
1453 | * get_new_streams, so we have to make sure not to add multiple | |
1454 | * times the same traces. | |
1455 | * If a trace is already in the context, we just skip this function. | |
1456 | */ | |
7840bb08 JD |
1457 | if (trace->in_use) { |
1458 | ret = 0; | |
1459 | goto end; | |
1460 | } | |
2acdc547 | 1461 | |
4a744367 JD |
1462 | BT_INIT_LIST_HEAD(&mmap_list.head); |
1463 | ||
1464 | for (i = 0; i < trace->streams->len; i++) { | |
1465 | stream = g_ptr_array_index(trace->streams, i); | |
4a744367 JD |
1466 | |
1467 | if (!stream->metadata_flag) { | |
1468 | new_mmap_stream = zmalloc(sizeof(struct bt_mmap_stream)); | |
1469 | new_mmap_stream->priv = (void *) stream; | |
1470 | new_mmap_stream->fd = -1; | |
1471 | bt_list_add(&new_mmap_stream->list, &mmap_list.head); | |
1472 | } else { | |
af701dc4 JD |
1473 | char *metadata_buf = NULL; |
1474 | ||
4a744367 | 1475 | /* Get all possible metadata before starting */ |
af701dc4 JD |
1476 | ret = get_new_metadata(ctx, stream, &metadata_buf); |
1477 | if (ret) { | |
1478 | free(metadata_buf); | |
1479 | goto end_free; | |
1480 | } | |
1481 | if (!stream->metadata_len) { | |
1482 | fprintf(stderr, "[error] empty metadata\n"); | |
1483 | ret = -1; | |
1484 | free(metadata_buf); | |
1485 | goto end_free; | |
1486 | } | |
1487 | ||
1488 | trace->metadata_fp = babeltrace_fmemopen(metadata_buf, | |
1489 | stream->metadata_len, "rb"); | |
1490 | if (!trace->metadata_fp) { | |
1491 | perror("Metadata fmemopen"); | |
1492 | ret = -1; | |
1493 | free(metadata_buf); | |
9abca178 | 1494 | goto end_free; |
af701dc4 | 1495 | } |
4a744367 JD |
1496 | } |
1497 | } | |
1498 | ||
1499 | if (!trace->metadata_fp) { | |
1500 | fprintf(stderr, "[error] No metadata stream opened\n"); | |
7840bb08 | 1501 | ret = -1; |
4a744367 JD |
1502 | goto end_free; |
1503 | } | |
1504 | ||
1505 | ret = bt_context_add_trace(bt_ctx, NULL, "ctf", | |
1506 | ctf_live_packet_seek, &mmap_list, trace->metadata_fp); | |
1507 | if (ret < 0) { | |
1508 | fprintf(stderr, "[error] Error adding trace\n"); | |
7840bb08 | 1509 | ret = -1; |
4a744367 JD |
1510 | goto end_free; |
1511 | } | |
af701dc4 JD |
1512 | trace->metadata_stream->metadata_len = 0; |
1513 | ||
150595c4 JD |
1514 | handle = (struct bt_trace_handle *) g_hash_table_lookup( |
1515 | bt_ctx->trace_handles, | |
1516 | (gpointer) (unsigned long) ret); | |
1517 | td = handle->td; | |
1518 | trace->handle = handle; | |
2acdc547 | 1519 | if (bt_ctx->current_iterator) { |
2acdc547 JD |
1520 | bt_iter_add_trace(bt_ctx->current_iterator, td); |
1521 | } | |
1522 | ||
4a744367 | 1523 | trace->trace_id = ret; |
2acdc547 | 1524 | trace->in_use = 1; |
4a744367 JD |
1525 | |
1526 | goto end; | |
1527 | ||
1528 | end_free: | |
1529 | bt_context_put(bt_ctx); | |
1530 | end: | |
7840bb08 JD |
1531 | return ret; |
1532 | } | |
1533 | ||
1534 | static | |
1535 | int add_traces(struct lttng_live_ctx *ctx) | |
1536 | { | |
1537 | int ret; | |
1538 | struct lttng_live_ctf_trace *trace; | |
1539 | GHashTableIter it; | |
1540 | gpointer key; | |
1541 | gpointer value; | |
1542 | ||
1543 | g_hash_table_iter_init(&it, ctx->session->ctf_traces); | |
1544 | while (g_hash_table_iter_next(&it, &key, &value)) { | |
1545 | trace = (struct lttng_live_ctf_trace *) value; | |
1546 | ret = add_one_trace(ctx, trace); | |
1547 | if (ret < 0) { | |
1548 | goto end; | |
1549 | } | |
1550 | } | |
1551 | ||
1552 | ret = 0; | |
1553 | ||
1554 | end: | |
1555 | return ret; | |
4a744367 JD |
1556 | } |
1557 | ||
73b2b0d1 JD |
1558 | /* |
1559 | * Request new streams for a session. | |
1560 | * Returns the number of streams received or a negative value on error. | |
1561 | */ | |
2acdc547 | 1562 | int lttng_live_get_new_streams(struct lttng_live_ctx *ctx, uint64_t id) |
6192b988 JD |
1563 | { |
1564 | struct lttng_viewer_cmd cmd; | |
2acdc547 JD |
1565 | struct lttng_viewer_new_streams_request rq; |
1566 | struct lttng_viewer_new_streams_response rp; | |
1567 | struct lttng_viewer_stream stream; | |
73b2b0d1 | 1568 | int ret, i, nb_streams = 0; |
6192b988 | 1569 | ssize_t ret_len; |
b5a1fa45 | 1570 | uint32_t stream_count; |
b727abf5 JR |
1571 | const size_t cmd_buf_len = sizeof(cmd) + sizeof(rq); |
1572 | char cmd_buf[cmd_buf_len]; | |
6192b988 | 1573 | |
8ace20bf MD |
1574 | if (lttng_live_should_quit()) { |
1575 | ret = -1; | |
1576 | goto end; | |
1577 | } | |
1578 | ||
2acdc547 | 1579 | cmd.cmd = htobe32(LTTNG_VIEWER_GET_NEW_STREAMS); |
259863bd | 1580 | cmd.data_size = htobe64((uint64_t) sizeof(rq)); |
e11a3d28 | 1581 | cmd.cmd_version = htobe32(0); |
6192b988 | 1582 | |
2acdc547 JD |
1583 | memset(&rq, 0, sizeof(rq)); |
1584 | rq.session_id = htobe64(id); | |
1585 | ||
b727abf5 JR |
1586 | /* |
1587 | * Merge the cmd and connection request to prevent a write-write | |
1588 | * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the | |
1589 | * second write to be performed quickly in presence of Nagle's algorithm. | |
1590 | */ | |
1591 | memcpy(cmd_buf, &cmd, sizeof(cmd)); | |
1592 | memcpy(cmd_buf + sizeof(cmd), &rq, sizeof(rq)); | |
6192b988 | 1593 | |
b727abf5 | 1594 | ret_len = lttng_live_send(ctx->control_sock, cmd_buf, cmd_buf_len); |
6192b988 | 1595 | if (ret_len < 0) { |
b727abf5 | 1596 | perror("[error] Error sending get_new_streams cmd and request"); |
6192b988 JD |
1597 | goto error; |
1598 | } | |
b727abf5 | 1599 | assert(ret_len == cmd_buf_len); |
6192b988 | 1600 | |
b7e8a8e1 | 1601 | ret_len = lttng_live_recv(ctx->control_sock, &rp, sizeof(rp)); |
f8612f31 MD |
1602 | if (ret_len == 0) { |
1603 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
1604 | goto error; |
1605 | } | |
2acdc547 | 1606 | if (ret_len < 0) { |
79620497 | 1607 | perror("[error] Error receiving get_new_streams response"); |
6192b988 JD |
1608 | goto error; |
1609 | } | |
2acdc547 JD |
1610 | assert(ret_len == sizeof(rp)); |
1611 | ||
1612 | switch(be32toh(rp.status)) { | |
1613 | case LTTNG_VIEWER_NEW_STREAMS_OK: | |
1614 | break; | |
1615 | case LTTNG_VIEWER_NEW_STREAMS_NO_NEW: | |
1616 | ret = 0; | |
1617 | goto end; | |
1618 | case LTTNG_VIEWER_NEW_STREAMS_HUP: | |
1619 | ret = -LTTNG_VIEWER_NEW_STREAMS_HUP; | |
1620 | goto end; | |
1621 | case LTTNG_VIEWER_NEW_STREAMS_ERR: | |
1622 | fprintf(stderr, "[error] get_new_streams error\n"); | |
8ace20bf | 1623 | goto error; |
2acdc547 JD |
1624 | default: |
1625 | fprintf(stderr, "[error] Unknown return code %u\n", | |
1626 | be32toh(rp.status)); | |
8ace20bf | 1627 | goto error; |
2acdc547 JD |
1628 | } |
1629 | ||
b5a1fa45 JD |
1630 | stream_count = be32toh(rp.streams_count); |
1631 | ctx->session->stream_count += stream_count; | |
2acdc547 JD |
1632 | /* |
1633 | * When the session is created but not started, we do an active wait | |
1634 | * until it starts. It allows the viewer to start processing the trace | |
1635 | * as soon as the session starts. | |
1636 | */ | |
1637 | if (ctx->session->stream_count == 0) { | |
1638 | ret = 0; | |
1639 | goto end; | |
1640 | } | |
1641 | printf_verbose("Waiting for %" PRIu64 " streams:\n", | |
1642 | ctx->session->stream_count); | |
1643 | ctx->session->streams = g_new0(struct lttng_live_viewer_stream, | |
1644 | ctx->session->stream_count); | |
b5a1fa45 | 1645 | for (i = 0; i < stream_count; i++) { |
b7e8a8e1 | 1646 | ret_len = lttng_live_recv(ctx->control_sock, &stream, sizeof(stream)); |
f8612f31 MD |
1647 | if (ret_len == 0) { |
1648 | fprintf(stderr, "[error] Remote side has closed connection\n"); | |
f8612f31 MD |
1649 | goto error; |
1650 | } | |
2acdc547 | 1651 | if (ret_len < 0) { |
79620497 | 1652 | perror("[error] Error receiving stream"); |
2acdc547 JD |
1653 | goto error; |
1654 | } | |
1655 | assert(ret_len == sizeof(stream)); | |
1656 | stream.path_name[LTTNG_VIEWER_PATH_MAX - 1] = '\0'; | |
1657 | stream.channel_name[LTTNG_VIEWER_NAME_MAX - 1] = '\0'; | |
1658 | ||
1659 | printf_verbose(" stream %" PRIu64 " : %s/%s\n", | |
1660 | be64toh(stream.id), stream.path_name, | |
1661 | stream.channel_name); | |
1662 | ctx->session->streams[i].id = be64toh(stream.id); | |
1663 | ctx->session->streams[i].session = ctx->session; | |
1664 | ||
2acdc547 | 1665 | ctx->session->streams[i].mmap_size = 0; |
fb6b45aa | 1666 | ctx->session->streams[i].ctf_stream_id = -1ULL; |
2acdc547 JD |
1667 | |
1668 | if (be32toh(stream.metadata_flag)) { | |
2acdc547 | 1669 | ctx->session->streams[i].metadata_flag = 1; |
2acdc547 JD |
1670 | } |
1671 | ret = lttng_live_ctf_trace_assign(&ctx->session->streams[i], | |
1672 | be64toh(stream.ctf_trace_id)); | |
1673 | if (ret < 0) { | |
1674 | goto error; | |
1675 | } | |
73b2b0d1 | 1676 | nb_streams++; |
2acdc547 JD |
1677 | |
1678 | } | |
73b2b0d1 | 1679 | ret = nb_streams; |
2acdc547 | 1680 | end: |
6192b988 | 1681 | return ret; |
8ace20bf MD |
1682 | |
1683 | error: | |
1684 | return -1; | |
6192b988 JD |
1685 | } |
1686 | ||
28756729 | 1687 | int lttng_live_read(struct lttng_live_ctx *ctx) |
4a744367 | 1688 | { |
28756729 JG |
1689 | int ret = -1; |
1690 | int i; | |
4a744367 JD |
1691 | struct bt_ctf_iter *iter; |
1692 | const struct bt_ctf_event *event; | |
1693 | struct bt_iter_pos begin_pos; | |
1694 | struct bt_trace_descriptor *td_write; | |
1695 | struct bt_format *fmt_write; | |
1696 | struct ctf_text_stream_pos *sout; | |
2acdc547 | 1697 | uint64_t id; |
4a744367 | 1698 | |
2acdc547 JD |
1699 | ctx->bt_ctx = bt_context_create(); |
1700 | if (!ctx->bt_ctx) { | |
4a744367 JD |
1701 | fprintf(stderr, "[error] bt_context_create allocation\n"); |
1702 | goto end; | |
1703 | } | |
1704 | ||
1705 | fmt_write = bt_lookup_format(g_quark_from_static_string("text")); | |
1706 | if (!fmt_write) { | |
1707 | fprintf(stderr, "[error] ctf-text error\n"); | |
1708 | goto end; | |
1709 | } | |
1710 | ||
1711 | td_write = fmt_write->open_trace(NULL, O_RDWR, NULL, NULL); | |
1712 | if (!td_write) { | |
1713 | fprintf(stderr, "[error] Error opening output trace\n"); | |
1714 | goto end_free; | |
1715 | } | |
1716 | ||
1717 | sout = container_of(td_write, struct ctf_text_stream_pos, | |
1718 | trace_descriptor); | |
85bb4663 | 1719 | if (!sout->parent.event_cb) { |
4a744367 | 1720 | goto end_free; |
85bb4663 | 1721 | } |
4a744367 | 1722 | |
6192b988 JD |
1723 | ret = lttng_live_create_viewer_session(ctx); |
1724 | if (ret < 0) { | |
1725 | goto end_free; | |
1726 | } | |
1727 | ||
2acdc547 JD |
1728 | for (i = 0; i < ctx->session_ids->len; i++) { |
1729 | id = g_array_index(ctx->session_ids, uint64_t, i); | |
7e5e4176 | 1730 | printf_verbose("Attaching to session %" PRIu64 "\n", id); |
2acdc547 JD |
1731 | ret = lttng_live_attach_session(ctx, id); |
1732 | printf_verbose("Attaching session returns %d\n", ret); | |
1733 | if (ret < 0) { | |
1734 | if (ret == -LTTNG_VIEWER_ATTACH_UNK) { | |
1735 | fprintf(stderr, "[error] Unknown session ID\n"); | |
1736 | } | |
1737 | goto end_free; | |
1738 | } | |
1739 | } | |
1740 | ||
4a744367 | 1741 | /* |
2acdc547 | 1742 | * As long as the session is active, we try to get new streams. |
4a744367 | 1743 | */ |
2acdc547 | 1744 | for (;;) { |
4a744367 JD |
1745 | int flags; |
1746 | ||
8ace20bf | 1747 | if (lttng_live_should_quit()) { |
28756729 | 1748 | ret = 0; |
8ace20bf MD |
1749 | goto end_free; |
1750 | } | |
1751 | ||
2acdc547 | 1752 | while (!ctx->session->stream_count) { |
8ace20bf MD |
1753 | if (lttng_live_should_quit() |
1754 | || ctx->session_ids->len == 0) { | |
28756729 | 1755 | ret = 0; |
4a744367 | 1756 | goto end_free; |
85bb4663 | 1757 | } |
2acdc547 | 1758 | ret = ask_new_streams(ctx); |
85bb4663 | 1759 | if (ret < 0) { |
6baf4b8e | 1760 | ret = 0; |
2acdc547 | 1761 | goto end_free; |
85bb4663 MD |
1762 | } |
1763 | if (!ctx->session->stream_count) { | |
85e2085e | 1764 | (void) poll(NULL, 0, ACTIVE_POLL_DELAY); |
85bb4663 | 1765 | } |
2acdc547 | 1766 | } |
4a744367 | 1767 | |
7840bb08 JD |
1768 | ret = add_traces(ctx); |
1769 | if (ret < 0) { | |
1770 | goto end_free; | |
1771 | } | |
4a744367 JD |
1772 | |
1773 | begin_pos.type = BT_SEEK_BEGIN; | |
2acdc547 | 1774 | iter = bt_ctf_iter_create(ctx->bt_ctx, &begin_pos, NULL); |
4a744367 | 1775 | if (!iter) { |
e29395a8 JG |
1776 | if (lttng_live_should_quit()) { |
1777 | ret = 0; | |
1778 | goto end; | |
1779 | } | |
4a744367 JD |
1780 | fprintf(stderr, "[error] Iterator creation error\n"); |
1781 | goto end; | |
1782 | } | |
1783 | for (;;) { | |
8ace20bf | 1784 | if (lttng_live_should_quit()) { |
28756729 | 1785 | ret = 0; |
8ace20bf MD |
1786 | goto end_free; |
1787 | } | |
4a744367 JD |
1788 | event = bt_ctf_iter_read_event_flags(iter, &flags); |
1789 | if (!(flags & BT_ITER_FLAG_RETRY)) { | |
1790 | if (!event) { | |
1791 | /* End of trace */ | |
1792 | break; | |
1793 | } | |
1794 | ret = sout->parent.event_cb(&sout->parent, | |
1795 | event->parent->stream); | |
1796 | if (ret) { | |
1797 | fprintf(stderr, "[error] Writing " | |
1798 | "event failed.\n"); | |
1799 | goto end_free; | |
1800 | } | |
1801 | } | |
1802 | ret = bt_iter_next(bt_ctf_get_iter(iter)); | |
1803 | if (ret < 0) { | |
1804 | goto end_free; | |
1805 | } | |
1806 | } | |
1807 | bt_ctf_iter_destroy(iter); | |
2acdc547 JD |
1808 | g_hash_table_foreach_remove(ctx->session->ctf_traces, |
1809 | del_traces, ctx->bt_ctx); | |
1810 | ctx->session->stream_count = 0; | |
1811 | } | |
4a744367 JD |
1812 | |
1813 | end_free: | |
2acdc547 | 1814 | bt_context_put(ctx->bt_ctx); |
4a744367 | 1815 | end: |
e29395a8 JG |
1816 | if (lttng_live_should_quit()) { |
1817 | ret = 0; | |
1818 | } | |
28756729 | 1819 | return ret; |
4a744367 | 1820 | } |