Commit | Line | Data |
---|---|---|
b8aa1682 | 1 | /* |
ab5be9fa MJ |
2 | * Copyright (C) 2012 Julien Desfossez <jdesfossez@efficios.com> |
3 | * Copyright (C) 2012 David Goulet <dgoulet@efficios.com> | |
4 | * Copyright (C) 2013 Jérémie Galarneau <jeremie.galarneau@efficios.com> | |
5 | * Copyright (C) 2015 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
b8aa1682 | 6 | * |
ab5be9fa | 7 | * SPDX-License-Identifier: GPL-2.0-only |
b8aa1682 | 8 | * |
b8aa1682 JD |
9 | */ |
10 | ||
6c1c0768 | 11 | #define _LGPL_SOURCE |
b8aa1682 JD |
12 | #include <getopt.h> |
13 | #include <grp.h> | |
14 | #include <limits.h> | |
15 | #include <pthread.h> | |
16 | #include <signal.h> | |
17 | #include <stdio.h> | |
18 | #include <stdlib.h> | |
19 | #include <string.h> | |
20 | #include <sys/mman.h> | |
21 | #include <sys/mount.h> | |
22 | #include <sys/resource.h> | |
23 | #include <sys/socket.h> | |
24 | #include <sys/stat.h> | |
25 | #include <sys/types.h> | |
26 | #include <sys/wait.h> | |
896010e3 | 27 | #include <sys/resource.h> |
173af62f | 28 | #include <inttypes.h> |
b8aa1682 JD |
29 | #include <urcu/futex.h> |
30 | #include <urcu/uatomic.h> | |
70626904 | 31 | #include <urcu/rculist.h> |
b8aa1682 JD |
32 | #include <unistd.h> |
33 | #include <fcntl.h> | |
f8be1183 | 34 | #include <strings.h> |
896010e3 | 35 | #include <ctype.h> |
ac497a37 | 36 | #include <algorithm> |
b8aa1682 JD |
37 | |
38 | #include <lttng/lttng.h> | |
39 | #include <common/common.h> | |
40 | #include <common/compat/poll.h> | |
41 | #include <common/compat/socket.h> | |
f263b7fd | 42 | #include <common/compat/endian.h> |
e8fa9fb0 | 43 | #include <common/compat/getenv.h> |
b8aa1682 | 44 | #include <common/defaults.h> |
3fd27398 | 45 | #include <common/daemonize.h> |
b8aa1682 JD |
46 | #include <common/futex.h> |
47 | #include <common/sessiond-comm/sessiond-comm.h> | |
48 | #include <common/sessiond-comm/inet.h> | |
b8aa1682 JD |
49 | #include <common/sessiond-comm/relayd.h> |
50 | #include <common/uri.h> | |
a02de639 | 51 | #include <common/utils.h> |
d3ecc550 | 52 | #include <common/align.h> |
3299fd31 | 53 | #include <common/ini-config/ini-config.h> |
5312a3ed JG |
54 | #include <common/dynamic-buffer.h> |
55 | #include <common/buffer-view.h> | |
70626904 | 56 | #include <common/string-utils/format.h> |
00e3b7f1 | 57 | #include <common/fd-tracker/fd-tracker.h> |
67609994 | 58 | #include <common/fd-tracker/utils.h> |
b8aa1682 | 59 | |
2a635488 | 60 | #include "backward-compatibility-group-by.h" |
0f907de1 | 61 | #include "cmd.h" |
2a635488 | 62 | #include "connection.h" |
d3e2ba59 | 63 | #include "ctf-trace.h" |
2a635488 | 64 | #include "health-relayd.h" |
1c20f0e2 | 65 | #include "index.h" |
d3e2ba59 | 66 | #include "live.h" |
2a635488 | 67 | #include "lttng-relayd.h" |
2a174661 | 68 | #include "session.h" |
2a635488 | 69 | #include "sessiond-trace-chunks.h" |
2a174661 | 70 | #include "stream.h" |
f056029c | 71 | #include "tcp_keep_alive.h" |
2a635488 JR |
72 | #include "testpoint.h" |
73 | #include "tracefile-array.h" | |
74 | #include "utils.h" | |
75 | #include "version.h" | |
76 | #include "viewer-stream.h" | |
b8aa1682 | 77 | |
4fc83d94 PP |
78 | static const char *help_msg = |
79 | #ifdef LTTNG_EMBED_HELP | |
80 | #include <lttng-relayd.8.h> | |
81 | #else | |
82 | NULL | |
83 | #endif | |
84 | ; | |
85 | ||
5569b118 JG |
86 | enum relay_connection_status { |
87 | RELAY_CONNECTION_STATUS_OK, | |
a9577b76 | 88 | /* An error occurred while processing an event on the connection. */ |
5569b118 JG |
89 | RELAY_CONNECTION_STATUS_ERROR, |
90 | /* Connection closed/shutdown cleanly. */ | |
91 | RELAY_CONNECTION_STATUS_CLOSED, | |
92 | }; | |
93 | ||
b8aa1682 | 94 | /* command line options */ |
ce9ee1fb | 95 | char *opt_output_path, *opt_working_directory; |
35ab25e5 | 96 | static int opt_daemon, opt_background, opt_print_version, opt_allow_clear = 1; |
a8b66566 | 97 | enum relay_group_output_by opt_group_output_by = RELAYD_GROUP_OUTPUT_BY_UNKNOWN; |
3fd27398 | 98 | |
e56e5792 MJ |
99 | /* Argument variables */ |
100 | int lttng_opt_quiet; /* not static in error.h */ | |
101 | int lttng_opt_verbose; /* not static in error.h */ | |
102 | int lttng_opt_mi; /* not static in error.h */ | |
103 | ||
3fd27398 MD |
104 | /* |
105 | * We need to wait for listener and live listener threads, as well as | |
106 | * health check thread, before being ready to signal readiness. | |
107 | */ | |
108 | #define NR_LTTNG_RELAY_READY 3 | |
109 | static int lttng_relay_ready = NR_LTTNG_RELAY_READY; | |
0848dba7 MD |
110 | |
111 | /* Size of receive buffer. */ | |
112 | #define RECV_DATA_BUFFER_SIZE 65536 | |
113 | ||
3fd27398 MD |
114 | static int recv_child_signal; /* Set to 1 when a SIGUSR1 signal is received. */ |
115 | static pid_t child_ppid; /* Internal parent PID use with daemonize. */ | |
116 | ||
095a4ae5 MD |
117 | static struct lttng_uri *control_uri; |
118 | static struct lttng_uri *data_uri; | |
d3e2ba59 | 119 | static struct lttng_uri *live_uri; |
b8aa1682 JD |
120 | |
121 | const char *progname; | |
b8aa1682 | 122 | |
65931c8b | 123 | const char *tracing_group_name = DEFAULT_TRACING_GROUP; |
cd60b05a JG |
124 | static int tracing_group_name_override; |
125 | ||
126 | const char * const config_section_name = "relayd"; | |
65931c8b | 127 | |
b8aa1682 JD |
128 | /* |
129 | * Quit pipe for all threads. This permits a single cancellation point | |
130 | * for all threads when receiving an event on the pipe. | |
131 | */ | |
0b242f62 | 132 | int thread_quit_pipe[2] = { -1, -1 }; |
b8aa1682 JD |
133 | |
134 | /* | |
135 | * This pipe is used to inform the worker thread that a command is queued and | |
136 | * ready to be processed. | |
137 | */ | |
58eb9381 | 138 | static int relay_conn_pipe[2] = { -1, -1 }; |
b8aa1682 | 139 | |
26c9d55e | 140 | /* Shared between threads */ |
b8aa1682 JD |
141 | static int dispatch_thread_exit; |
142 | ||
143 | static pthread_t listener_thread; | |
144 | static pthread_t dispatcher_thread; | |
145 | static pthread_t worker_thread; | |
65931c8b | 146 | static pthread_t health_thread; |
b8aa1682 | 147 | |
7591bab1 MD |
148 | /* |
149 | * last_relay_stream_id_lock protects last_relay_stream_id increment | |
150 | * atomicity on 32-bit architectures. | |
151 | */ | |
152 | static pthread_mutex_t last_relay_stream_id_lock = PTHREAD_MUTEX_INITIALIZER; | |
095a4ae5 | 153 | static uint64_t last_relay_stream_id; |
b8aa1682 JD |
154 | |
155 | /* | |
156 | * Relay command queue. | |
157 | * | |
158 | * The relay_thread_listener and relay_thread_dispatcher communicate with this | |
159 | * queue. | |
160 | */ | |
58eb9381 | 161 | static struct relay_conn_queue relay_conn_queue; |
b8aa1682 | 162 | |
896010e3 | 163 | /* Cap of file desriptors to be in simultaneous use by the relay daemon. */ |
5c0551f9 | 164 | static unsigned int lttng_opt_fd_pool_size = -1; |
896010e3 | 165 | |
d3e2ba59 JD |
166 | /* Global relay stream hash table. */ |
167 | struct lttng_ht *relay_streams_ht; | |
168 | ||
92c6ca54 DG |
169 | /* Global relay viewer stream hash table. */ |
170 | struct lttng_ht *viewer_streams_ht; | |
171 | ||
7591bab1 MD |
172 | /* Global relay sessions hash table. */ |
173 | struct lttng_ht *sessions_ht; | |
0a6518b0 | 174 | |
55706a7d | 175 | /* Relayd health monitoring */ |
eea7556c | 176 | struct health_app *health_relayd; |
55706a7d | 177 | |
23c8ff50 JG |
178 | struct sessiond_trace_chunk_registry *sessiond_trace_chunk_registry; |
179 | ||
00e3b7f1 JG |
180 | /* Global fd tracker. */ |
181 | struct fd_tracker *the_fd_tracker; | |
182 | ||
cd60b05a JG |
183 | static struct option long_options[] = { |
184 | { "control-port", 1, 0, 'C', }, | |
185 | { "data-port", 1, 0, 'D', }, | |
8d5c808e | 186 | { "live-port", 1, 0, 'L', }, |
cd60b05a | 187 | { "daemonize", 0, 0, 'd', }, |
b5218ffb | 188 | { "background", 0, 0, 'b', }, |
cd60b05a | 189 | { "group", 1, 0, 'g', }, |
5c0551f9 | 190 | { "fd-pool-size", 1, 0, '\0', }, |
cd60b05a JG |
191 | { "help", 0, 0, 'h', }, |
192 | { "output", 1, 0, 'o', }, | |
193 | { "verbose", 0, 0, 'v', }, | |
194 | { "config", 1, 0, 'f' }, | |
3a904098 | 195 | { "version", 0, 0, 'V' }, |
ce9ee1fb | 196 | { "working-directory", 1, 0, 'w', }, |
a8b66566 JR |
197 | { "group-output-by-session", 0, 0, 's', }, |
198 | { "group-output-by-host", 0, 0, 'p', }, | |
35ab25e5 | 199 | { "disallow-clear", 0, 0, 'x' }, |
cd60b05a JG |
200 | { NULL, 0, 0, 0, }, |
201 | }; | |
202 | ||
3a904098 | 203 | static const char *config_ignore_options[] = { "help", "config", "version" }; |
cd60b05a | 204 | |
a3bc3918 JR |
205 | static void print_version(void) { |
206 | fprintf(stdout, "%s\n", VERSION); | |
207 | } | |
208 | ||
209 | static void relayd_config_log(void) | |
210 | { | |
211 | DBG("LTTng-relayd " VERSION " - " VERSION_NAME "%s%s", | |
212 | GIT_VERSION[0] == '\0' ? "" : " - " GIT_VERSION, | |
213 | EXTRA_VERSION_NAME[0] == '\0' ? "" : " - " EXTRA_VERSION_NAME); | |
214 | if (EXTRA_VERSION_DESCRIPTION[0] != '\0') { | |
215 | DBG("LTTng-relayd extra version description:\n\t" EXTRA_VERSION_DESCRIPTION "\n"); | |
216 | } | |
7f5ed73a JR |
217 | if (EXTRA_VERSION_PATCHES[0] != '\0') { |
218 | DBG("LTTng-relayd extra patches:\n\t" EXTRA_VERSION_PATCHES "\n"); | |
219 | } | |
a3bc3918 JR |
220 | } |
221 | ||
cd60b05a JG |
222 | /* |
223 | * Take an option from the getopt output and set it in the right variable to be | |
224 | * used later. | |
225 | * | |
226 | * Return 0 on success else a negative value. | |
227 | */ | |
7591bab1 | 228 | static int set_option(int opt, const char *arg, const char *optname) |
b8aa1682 | 229 | { |
cd60b05a JG |
230 | int ret; |
231 | ||
232 | switch (opt) { | |
233 | case 0: | |
5c0551f9 | 234 | if (!strcmp(optname, "fd-pool-size")) { |
896010e3 JG |
235 | unsigned long v; |
236 | ||
237 | errno = 0; | |
238 | v = strtoul(arg, NULL, 0); | |
60b7e1f8 | 239 | if (errno != 0 || !isdigit((unsigned char) arg[0])) { |
5c0551f9 | 240 | ERR("Wrong value in --fd-pool-size parameter: %s", arg); |
896010e3 JG |
241 | ret = -1; |
242 | goto end; | |
243 | } | |
896010e3 | 244 | if (v >= UINT_MAX) { |
5c0551f9 | 245 | ERR("File descriptor cap overflow in --fd-pool-size parameter: %s", arg); |
896010e3 JG |
246 | ret = -1; |
247 | goto end; | |
248 | } | |
5c0551f9 | 249 | lttng_opt_fd_pool_size = (unsigned int) v; |
896010e3 JG |
250 | } else { |
251 | fprintf(stderr, "unknown option %s", optname); | |
252 | if (arg) { | |
253 | fprintf(stderr, " with arg %s\n", arg); | |
254 | } | |
cd60b05a JG |
255 | } |
256 | break; | |
257 | case 'C': | |
e8fa9fb0 MD |
258 | if (lttng_is_setuid_setgid()) { |
259 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
260 | "-C, --control-port"); | |
261 | } else { | |
262 | ret = uri_parse(arg, &control_uri); | |
263 | if (ret < 0) { | |
264 | ERR("Invalid control URI specified"); | |
265 | goto end; | |
266 | } | |
267 | if (control_uri->port == 0) { | |
268 | control_uri->port = DEFAULT_NETWORK_CONTROL_PORT; | |
269 | } | |
cd60b05a JG |
270 | } |
271 | break; | |
272 | case 'D': | |
e8fa9fb0 MD |
273 | if (lttng_is_setuid_setgid()) { |
274 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
275 | "-D, -data-port"); | |
276 | } else { | |
277 | ret = uri_parse(arg, &data_uri); | |
278 | if (ret < 0) { | |
279 | ERR("Invalid data URI specified"); | |
280 | goto end; | |
281 | } | |
282 | if (data_uri->port == 0) { | |
283 | data_uri->port = DEFAULT_NETWORK_DATA_PORT; | |
284 | } | |
cd60b05a JG |
285 | } |
286 | break; | |
8d5c808e | 287 | case 'L': |
e8fa9fb0 MD |
288 | if (lttng_is_setuid_setgid()) { |
289 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
290 | "-L, -live-port"); | |
291 | } else { | |
292 | ret = uri_parse(arg, &live_uri); | |
293 | if (ret < 0) { | |
294 | ERR("Invalid live URI specified"); | |
295 | goto end; | |
296 | } | |
297 | if (live_uri->port == 0) { | |
298 | live_uri->port = DEFAULT_NETWORK_VIEWER_PORT; | |
299 | } | |
8d5c808e AM |
300 | } |
301 | break; | |
cd60b05a JG |
302 | case 'd': |
303 | opt_daemon = 1; | |
304 | break; | |
b5218ffb MD |
305 | case 'b': |
306 | opt_background = 1; | |
307 | break; | |
cd60b05a | 308 | case 'g': |
e8fa9fb0 MD |
309 | if (lttng_is_setuid_setgid()) { |
310 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
311 | "-g, --group"); | |
312 | } else { | |
313 | tracing_group_name = strdup(arg); | |
314 | if (tracing_group_name == NULL) { | |
315 | ret = -errno; | |
316 | PERROR("strdup"); | |
317 | goto end; | |
318 | } | |
319 | tracing_group_name_override = 1; | |
330a40bb | 320 | } |
cd60b05a JG |
321 | break; |
322 | case 'h': | |
4fc83d94 | 323 | ret = utils_show_help(8, "lttng-relayd", help_msg); |
655b5cc1 | 324 | if (ret) { |
4fc83d94 | 325 | ERR("Cannot show --help for `lttng-relayd`"); |
655b5cc1 PP |
326 | perror("exec"); |
327 | } | |
cd60b05a | 328 | exit(EXIT_FAILURE); |
3a904098 | 329 | case 'V': |
a3bc3918 JR |
330 | opt_print_version = 1; |
331 | break; | |
cd60b05a | 332 | case 'o': |
e8fa9fb0 MD |
333 | if (lttng_is_setuid_setgid()) { |
334 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
335 | "-o, --output"); | |
336 | } else { | |
337 | ret = asprintf(&opt_output_path, "%s", arg); | |
338 | if (ret < 0) { | |
339 | ret = -errno; | |
340 | PERROR("asprintf opt_output_path"); | |
341 | goto end; | |
342 | } | |
cd60b05a JG |
343 | } |
344 | break; | |
ce9ee1fb JR |
345 | case 'w': |
346 | if (lttng_is_setuid_setgid()) { | |
347 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
348 | "-w, --working-directory"); | |
349 | } else { | |
350 | ret = asprintf(&opt_working_directory, "%s", arg); | |
351 | if (ret < 0) { | |
352 | ret = -errno; | |
353 | PERROR("asprintf opt_working_directory"); | |
354 | goto end; | |
355 | } | |
356 | } | |
357 | break; | |
358 | ||
cd60b05a JG |
359 | case 'v': |
360 | /* Verbose level can increase using multiple -v */ | |
361 | if (arg) { | |
362 | lttng_opt_verbose = config_parse_value(arg); | |
363 | } else { | |
849e5b7b DG |
364 | /* Only 3 level of verbosity (-vvv). */ |
365 | if (lttng_opt_verbose < 3) { | |
366 | lttng_opt_verbose += 1; | |
367 | } | |
cd60b05a JG |
368 | } |
369 | break; | |
a8b66566 JR |
370 | case 's': |
371 | if (opt_group_output_by != RELAYD_GROUP_OUTPUT_BY_UNKNOWN) { | |
372 | ERR("Cannot set --group-output-by-session, another --group-output-by argument is present"); | |
373 | exit(EXIT_FAILURE); | |
374 | } | |
375 | opt_group_output_by = RELAYD_GROUP_OUTPUT_BY_SESSION; | |
376 | break; | |
377 | case 'p': | |
378 | if (opt_group_output_by != RELAYD_GROUP_OUTPUT_BY_UNKNOWN) { | |
379 | ERR("Cannot set --group-output-by-host, another --group-output-by argument is present"); | |
380 | exit(EXIT_FAILURE); | |
381 | } | |
382 | opt_group_output_by = RELAYD_GROUP_OUTPUT_BY_HOST; | |
383 | break; | |
35ab25e5 MD |
384 | case 'x': |
385 | /* Disallow clear */ | |
386 | opt_allow_clear = 0; | |
387 | break; | |
cd60b05a JG |
388 | default: |
389 | /* Unknown option or other error. | |
390 | * Error is printed by getopt, just return */ | |
391 | ret = -1; | |
392 | goto end; | |
393 | } | |
394 | ||
395 | /* All good. */ | |
396 | ret = 0; | |
397 | ||
398 | end: | |
399 | return ret; | |
400 | } | |
401 | ||
402 | /* | |
403 | * config_entry_handler_cb used to handle options read from a config file. | |
f40ef1d5 | 404 | * See config_entry_handler_cb comment in common/config/session-config.h for the |
cd60b05a JG |
405 | * return value conventions. |
406 | */ | |
7591bab1 | 407 | static int config_entry_handler(const struct config_entry *entry, void *unused) |
cd60b05a JG |
408 | { |
409 | int ret = 0, i; | |
410 | ||
411 | if (!entry || !entry->name || !entry->value) { | |
412 | ret = -EINVAL; | |
413 | goto end; | |
414 | } | |
415 | ||
416 | /* Check if the option is to be ignored */ | |
417 | for (i = 0; i < sizeof(config_ignore_options) / sizeof(char *); i++) { | |
418 | if (!strcmp(entry->name, config_ignore_options[i])) { | |
419 | goto end; | |
420 | } | |
421 | } | |
422 | ||
423 | for (i = 0; i < (sizeof(long_options) / sizeof(struct option)) - 1; i++) { | |
424 | /* Ignore if entry name is not fully matched. */ | |
425 | if (strcmp(entry->name, long_options[i].name)) { | |
426 | continue; | |
427 | } | |
428 | ||
429 | /* | |
7591bab1 MD |
430 | * If the option takes no argument on the command line, |
431 | * we have to check if the value is "true". We support | |
432 | * non-zero numeric values, true, on and yes. | |
cd60b05a JG |
433 | */ |
434 | if (!long_options[i].has_arg) { | |
435 | ret = config_parse_value(entry->value); | |
436 | if (ret <= 0) { | |
437 | if (ret) { | |
438 | WARN("Invalid configuration value \"%s\" for option %s", | |
439 | entry->value, entry->name); | |
440 | } | |
441 | /* False, skip boolean config option. */ | |
442 | goto end; | |
443 | } | |
444 | } | |
445 | ||
446 | ret = set_option(long_options[i].val, entry->value, entry->name); | |
447 | goto end; | |
448 | } | |
449 | ||
450 | WARN("Unrecognized option \"%s\" in daemon configuration file.", | |
451 | entry->name); | |
452 | ||
453 | end: | |
454 | return ret; | |
455 | } | |
456 | ||
2a10de3b JR |
457 | static int parse_env_options(void) |
458 | { | |
459 | int ret = 0; | |
460 | char *value = NULL; | |
461 | ||
462 | value = lttng_secure_getenv(DEFAULT_LTTNG_RELAYD_WORKING_DIRECTORY_ENV); | |
463 | if (value) { | |
464 | opt_working_directory = strdup(value); | |
465 | if (!opt_working_directory) { | |
466 | ERR("Failed to allocate working directory string (\"%s\")", | |
467 | value); | |
468 | ret = -1; | |
469 | } | |
470 | } | |
471 | return ret; | |
472 | } | |
473 | ||
5c0551f9 JG |
474 | static int set_fd_pool_size(void) |
475 | { | |
476 | int ret = 0; | |
477 | struct rlimit rlimit; | |
478 | ||
479 | ret = getrlimit(RLIMIT_NOFILE, &rlimit); | |
480 | if (ret) { | |
481 | PERROR("Failed to get file descriptor limit"); | |
482 | ret = -1; | |
483 | goto end; | |
484 | } | |
485 | ||
486 | DBG("File descriptor count limits are %" PRIu64 " (soft) and %" PRIu64 " (hard)", | |
487 | (uint64_t) rlimit.rlim_cur, | |
488 | (uint64_t) rlimit.rlim_max); | |
489 | if (lttng_opt_fd_pool_size == -1) { | |
490 | /* Use default value (soft limit - reserve). */ | |
491 | if (rlimit.rlim_cur < DEFAULT_RELAYD_MIN_FD_POOL_SIZE) { | |
492 | ERR("The process' file number limit is too low (%" PRIu64 "). The process' file number limit must be set to at least %i.", | |
493 | (uint64_t) rlimit.rlim_cur, DEFAULT_RELAYD_MIN_FD_POOL_SIZE); | |
494 | ret = -1; | |
495 | goto end; | |
496 | } | |
497 | lttng_opt_fd_pool_size = rlimit.rlim_cur - | |
498 | DEFAULT_RELAYD_FD_POOL_SIZE_RESERVE; | |
499 | goto end; | |
500 | } | |
501 | ||
502 | if (lttng_opt_fd_pool_size < DEFAULT_RELAYD_MIN_FD_POOL_SIZE) { | |
503 | ERR("File descriptor pool size must be set to at least %d", | |
504 | DEFAULT_RELAYD_MIN_FD_POOL_SIZE); | |
505 | ret = -1; | |
506 | goto end; | |
507 | } | |
508 | ||
509 | if (lttng_opt_fd_pool_size > rlimit.rlim_cur) { | |
510 | ERR("File descriptor pool size argument (%u) exceeds the process' soft limit (%" PRIu64 ").", | |
511 | lttng_opt_fd_pool_size, (uint64_t) rlimit.rlim_cur); | |
512 | ret = -1; | |
513 | goto end; | |
514 | } | |
515 | ||
d49487dc | 516 | DBG("File descriptor pool size argument (%u) adjusted to %u to accommodates transient fd uses", |
5c0551f9 JG |
517 | lttng_opt_fd_pool_size, |
518 | lttng_opt_fd_pool_size - DEFAULT_RELAYD_FD_POOL_SIZE_RESERVE); | |
519 | lttng_opt_fd_pool_size -= DEFAULT_RELAYD_FD_POOL_SIZE_RESERVE; | |
520 | end: | |
521 | return ret; | |
522 | } | |
523 | ||
7591bab1 | 524 | static int set_options(int argc, char **argv) |
cd60b05a | 525 | { |
178a0557 | 526 | int c, ret = 0, option_index = 0, retval = 0; |
cd60b05a JG |
527 | int orig_optopt = optopt, orig_optind = optind; |
528 | char *default_address, *optstring; | |
3a9e5d16 | 529 | char *config_path = NULL; |
cd60b05a JG |
530 | |
531 | optstring = utils_generate_optstring(long_options, | |
532 | sizeof(long_options) / sizeof(struct option)); | |
533 | if (!optstring) { | |
178a0557 | 534 | retval = -ENOMEM; |
cd60b05a JG |
535 | goto exit; |
536 | } | |
537 | ||
538 | /* Check for the --config option */ | |
539 | ||
540 | while ((c = getopt_long(argc, argv, optstring, long_options, | |
541 | &option_index)) != -1) { | |
542 | if (c == '?') { | |
178a0557 | 543 | retval = -EINVAL; |
cd60b05a JG |
544 | goto exit; |
545 | } else if (c != 'f') { | |
546 | continue; | |
547 | } | |
548 | ||
e8fa9fb0 MD |
549 | if (lttng_is_setuid_setgid()) { |
550 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
551 | "-f, --config"); | |
552 | } else { | |
3a9e5d16 | 553 | free(config_path); |
e8fa9fb0 MD |
554 | config_path = utils_expand_path(optarg); |
555 | if (!config_path) { | |
556 | ERR("Failed to resolve path: %s", optarg); | |
557 | } | |
cd60b05a JG |
558 | } |
559 | } | |
560 | ||
561 | ret = config_get_section_entries(config_path, config_section_name, | |
562 | config_entry_handler, NULL); | |
563 | if (ret) { | |
564 | if (ret > 0) { | |
565 | ERR("Invalid configuration option at line %i", ret); | |
cd60b05a | 566 | } |
178a0557 | 567 | retval = -1; |
cd60b05a JG |
568 | goto exit; |
569 | } | |
b8aa1682 | 570 | |
cd60b05a JG |
571 | /* Reset getopt's global state */ |
572 | optopt = orig_optopt; | |
573 | optind = orig_optind; | |
b8aa1682 | 574 | while (1) { |
cd60b05a | 575 | c = getopt_long(argc, argv, optstring, long_options, &option_index); |
b8aa1682 JD |
576 | if (c == -1) { |
577 | break; | |
578 | } | |
579 | ||
cd60b05a JG |
580 | ret = set_option(c, optarg, long_options[option_index].name); |
581 | if (ret < 0) { | |
178a0557 | 582 | retval = -1; |
b8aa1682 JD |
583 | goto exit; |
584 | } | |
585 | } | |
586 | ||
587 | /* assign default values */ | |
588 | if (control_uri == NULL) { | |
fa91dc52 MD |
589 | ret = asprintf(&default_address, |
590 | "tcp://" DEFAULT_NETWORK_CONTROL_BIND_ADDRESS ":%d", | |
591 | DEFAULT_NETWORK_CONTROL_PORT); | |
b8aa1682 JD |
592 | if (ret < 0) { |
593 | PERROR("asprintf default data address"); | |
178a0557 | 594 | retval = -1; |
b8aa1682 JD |
595 | goto exit; |
596 | } | |
597 | ||
598 | ret = uri_parse(default_address, &control_uri); | |
599 | free(default_address); | |
600 | if (ret < 0) { | |
601 | ERR("Invalid control URI specified"); | |
178a0557 | 602 | retval = -1; |
b8aa1682 JD |
603 | goto exit; |
604 | } | |
605 | } | |
606 | if (data_uri == NULL) { | |
fa91dc52 MD |
607 | ret = asprintf(&default_address, |
608 | "tcp://" DEFAULT_NETWORK_DATA_BIND_ADDRESS ":%d", | |
609 | DEFAULT_NETWORK_DATA_PORT); | |
b8aa1682 JD |
610 | if (ret < 0) { |
611 | PERROR("asprintf default data address"); | |
178a0557 | 612 | retval = -1; |
b8aa1682 JD |
613 | goto exit; |
614 | } | |
615 | ||
616 | ret = uri_parse(default_address, &data_uri); | |
617 | free(default_address); | |
618 | if (ret < 0) { | |
619 | ERR("Invalid data URI specified"); | |
178a0557 | 620 | retval = -1; |
b8aa1682 JD |
621 | goto exit; |
622 | } | |
623 | } | |
d3e2ba59 | 624 | if (live_uri == NULL) { |
fa91dc52 MD |
625 | ret = asprintf(&default_address, |
626 | "tcp://" DEFAULT_NETWORK_VIEWER_BIND_ADDRESS ":%d", | |
627 | DEFAULT_NETWORK_VIEWER_PORT); | |
d3e2ba59 JD |
628 | if (ret < 0) { |
629 | PERROR("asprintf default viewer control address"); | |
178a0557 | 630 | retval = -1; |
d3e2ba59 JD |
631 | goto exit; |
632 | } | |
633 | ||
634 | ret = uri_parse(default_address, &live_uri); | |
635 | free(default_address); | |
636 | if (ret < 0) { | |
637 | ERR("Invalid viewer control URI specified"); | |
178a0557 | 638 | retval = -1; |
d3e2ba59 JD |
639 | goto exit; |
640 | } | |
641 | } | |
5c0551f9 JG |
642 | ret = set_fd_pool_size(); |
643 | if (ret) { | |
644 | retval = -1; | |
645 | goto exit; | |
896010e3 | 646 | } |
b8aa1682 | 647 | |
a8b66566 JR |
648 | if (opt_group_output_by == RELAYD_GROUP_OUTPUT_BY_UNKNOWN) { |
649 | opt_group_output_by = RELAYD_GROUP_OUTPUT_BY_HOST; | |
650 | } | |
35ab25e5 MD |
651 | if (opt_allow_clear) { |
652 | /* Check if env variable exists. */ | |
653 | const char *value = lttng_secure_getenv(DEFAULT_LTTNG_RELAYD_DISALLOW_CLEAR_ENV); | |
654 | if (value) { | |
655 | ret = config_parse_value(value); | |
656 | if (ret < 0) { | |
657 | ERR("Invalid value for %s specified", DEFAULT_LTTNG_RELAYD_DISALLOW_CLEAR_ENV); | |
658 | retval = -1; | |
659 | goto exit; | |
660 | } | |
661 | opt_allow_clear = !ret; | |
662 | } | |
663 | } | |
a8b66566 | 664 | |
b8aa1682 | 665 | exit: |
3a9e5d16 | 666 | free(config_path); |
cd60b05a | 667 | free(optstring); |
178a0557 | 668 | return retval; |
b8aa1682 JD |
669 | } |
670 | ||
7591bab1 MD |
671 | static void print_global_objects(void) |
672 | { | |
7591bab1 MD |
673 | print_viewer_streams(); |
674 | print_relay_streams(); | |
675 | print_sessions(); | |
7591bab1 MD |
676 | } |
677 | ||
5c0551f9 JG |
678 | static int noop_close(void *data, int *fds) |
679 | { | |
680 | return 0; | |
681 | } | |
682 | ||
683 | static void untrack_stdio(void) | |
684 | { | |
685 | int fds[] = { fileno(stdout), fileno(stderr) }; | |
686 | ||
687 | /* | |
688 | * noop_close is used since we don't really want to close | |
689 | * the stdio output fds; we merely want to stop tracking them. | |
690 | */ | |
691 | (void) fd_tracker_close_unsuspendable_fd(the_fd_tracker, | |
692 | fds, 2, noop_close, NULL); | |
693 | } | |
694 | ||
b8aa1682 JD |
695 | /* |
696 | * Cleanup the daemon | |
697 | */ | |
7591bab1 | 698 | static void relayd_cleanup(void) |
b8aa1682 | 699 | { |
7591bab1 MD |
700 | print_global_objects(); |
701 | ||
b8aa1682 JD |
702 | DBG("Cleaning up"); |
703 | ||
178a0557 MD |
704 | if (viewer_streams_ht) |
705 | lttng_ht_destroy(viewer_streams_ht); | |
706 | if (relay_streams_ht) | |
707 | lttng_ht_destroy(relay_streams_ht); | |
7591bab1 MD |
708 | if (sessions_ht) |
709 | lttng_ht_destroy(sessions_ht); | |
178a0557 | 710 | |
095a4ae5 | 711 | free(opt_output_path); |
ce9ee1fb | 712 | free(opt_working_directory); |
095a4ae5 | 713 | |
794e2e5f JG |
714 | if (health_relayd) { |
715 | health_app_destroy(health_relayd); | |
716 | } | |
a02de639 | 717 | /* Close thread quit pipes */ |
bcee2b96 JG |
718 | if (health_quit_pipe[0] != -1) { |
719 | (void) fd_tracker_util_pipe_close( | |
720 | the_fd_tracker, health_quit_pipe); | |
721 | } | |
67609994 JG |
722 | if (thread_quit_pipe[0] != -1) { |
723 | (void) fd_tracker_util_pipe_close( | |
724 | the_fd_tracker, thread_quit_pipe); | |
725 | } | |
794e2e5f JG |
726 | if (sessiond_trace_chunk_registry) { |
727 | sessiond_trace_chunk_registry_destroy( | |
728 | sessiond_trace_chunk_registry); | |
729 | } | |
00e3b7f1 | 730 | if (the_fd_tracker) { |
9c256b01 JG |
731 | untrack_stdio(); |
732 | /* | |
733 | * fd_tracker_destroy() will log the contents of the fd-tracker | |
734 | * if a leak is detected. | |
735 | */ | |
00e3b7f1 JG |
736 | fd_tracker_destroy(the_fd_tracker); |
737 | } | |
794e2e5f | 738 | |
710c1f73 DG |
739 | uri_free(control_uri); |
740 | uri_free(data_uri); | |
8d5c808e | 741 | /* Live URI is freed in the live thread. */ |
cd60b05a JG |
742 | |
743 | if (tracing_group_name_override) { | |
744 | free((void *) tracing_group_name); | |
745 | } | |
b8aa1682 JD |
746 | } |
747 | ||
748 | /* | |
749 | * Write to writable pipe used to notify a thread. | |
750 | */ | |
7591bab1 | 751 | static int notify_thread_pipe(int wpipe) |
b8aa1682 | 752 | { |
6cd525e8 | 753 | ssize_t ret; |
b8aa1682 | 754 | |
6cd525e8 MD |
755 | ret = lttng_write(wpipe, "!", 1); |
756 | if (ret < 1) { | |
b8aa1682 | 757 | PERROR("write poll pipe"); |
b4aacfdc | 758 | goto end; |
b8aa1682 | 759 | } |
b4aacfdc MD |
760 | ret = 0; |
761 | end: | |
b8aa1682 JD |
762 | return ret; |
763 | } | |
764 | ||
7591bab1 | 765 | static int notify_health_quit_pipe(int *pipe) |
65931c8b | 766 | { |
6cd525e8 | 767 | ssize_t ret; |
65931c8b | 768 | |
6cd525e8 MD |
769 | ret = lttng_write(pipe[1], "4", 1); |
770 | if (ret < 1) { | |
65931c8b | 771 | PERROR("write relay health quit"); |
b4aacfdc | 772 | goto end; |
65931c8b | 773 | } |
b4aacfdc MD |
774 | ret = 0; |
775 | end: | |
776 | return ret; | |
65931c8b MD |
777 | } |
778 | ||
b8aa1682 | 779 | /* |
b4aacfdc | 780 | * Stop all relayd and relayd-live threads. |
b8aa1682 | 781 | */ |
b4aacfdc | 782 | int lttng_relay_stop_threads(void) |
b8aa1682 | 783 | { |
b4aacfdc | 784 | int retval = 0; |
b8aa1682 JD |
785 | |
786 | /* Stopping all threads */ | |
787 | DBG("Terminating all threads"); | |
b4aacfdc | 788 | if (notify_thread_pipe(thread_quit_pipe[1])) { |
b8aa1682 | 789 | ERR("write error on thread quit pipe"); |
b4aacfdc | 790 | retval = -1; |
b8aa1682 JD |
791 | } |
792 | ||
b4aacfdc MD |
793 | if (notify_health_quit_pipe(health_quit_pipe)) { |
794 | ERR("write error on health quit pipe"); | |
795 | } | |
65931c8b | 796 | |
b8aa1682 | 797 | /* Dispatch thread */ |
26c9d55e | 798 | CMM_STORE_SHARED(dispatch_thread_exit, 1); |
58eb9381 | 799 | futex_nto1_wake(&relay_conn_queue.futex); |
178a0557 | 800 | |
b4aacfdc | 801 | if (relayd_live_stop()) { |
178a0557 | 802 | ERR("Error stopping live threads"); |
b4aacfdc | 803 | retval = -1; |
178a0557 | 804 | } |
b4aacfdc | 805 | return retval; |
b8aa1682 JD |
806 | } |
807 | ||
808 | /* | |
809 | * Signal handler for the daemon | |
810 | * | |
811 | * Simply stop all worker threads, leaving main() return gracefully after | |
812 | * joining all threads and calling cleanup(). | |
813 | */ | |
7591bab1 | 814 | static void sighandler(int sig) |
b8aa1682 JD |
815 | { |
816 | switch (sig) { | |
b8aa1682 JD |
817 | case SIGINT: |
818 | DBG("SIGINT caught"); | |
b4aacfdc MD |
819 | if (lttng_relay_stop_threads()) { |
820 | ERR("Error stopping threads"); | |
821 | } | |
b8aa1682 JD |
822 | break; |
823 | case SIGTERM: | |
824 | DBG("SIGTERM caught"); | |
b4aacfdc MD |
825 | if (lttng_relay_stop_threads()) { |
826 | ERR("Error stopping threads"); | |
827 | } | |
b8aa1682 | 828 | break; |
3fd27398 MD |
829 | case SIGUSR1: |
830 | CMM_STORE_SHARED(recv_child_signal, 1); | |
831 | break; | |
b8aa1682 JD |
832 | default: |
833 | break; | |
834 | } | |
835 | } | |
836 | ||
837 | /* | |
838 | * Setup signal handler for : | |
839 | * SIGINT, SIGTERM, SIGPIPE | |
840 | */ | |
7591bab1 | 841 | static int set_signal_handler(void) |
b8aa1682 JD |
842 | { |
843 | int ret = 0; | |
844 | struct sigaction sa; | |
845 | sigset_t sigset; | |
846 | ||
847 | if ((ret = sigemptyset(&sigset)) < 0) { | |
848 | PERROR("sigemptyset"); | |
849 | return ret; | |
850 | } | |
851 | ||
b8aa1682 JD |
852 | sa.sa_mask = sigset; |
853 | sa.sa_flags = 0; | |
0072e5e2 MD |
854 | |
855 | sa.sa_handler = sighandler; | |
b8aa1682 JD |
856 | if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) { |
857 | PERROR("sigaction"); | |
858 | return ret; | |
859 | } | |
860 | ||
861 | if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) { | |
862 | PERROR("sigaction"); | |
863 | return ret; | |
864 | } | |
865 | ||
0072e5e2 | 866 | if ((ret = sigaction(SIGUSR1, &sa, NULL)) < 0) { |
b8aa1682 JD |
867 | PERROR("sigaction"); |
868 | return ret; | |
869 | } | |
870 | ||
0072e5e2 MD |
871 | sa.sa_handler = SIG_IGN; |
872 | if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) { | |
3fd27398 MD |
873 | PERROR("sigaction"); |
874 | return ret; | |
875 | } | |
876 | ||
877 | DBG("Signal handler set for SIGTERM, SIGUSR1, SIGPIPE and SIGINT"); | |
b8aa1682 JD |
878 | |
879 | return ret; | |
880 | } | |
881 | ||
3fd27398 MD |
882 | void lttng_relay_notify_ready(void) |
883 | { | |
884 | /* Notify the parent of the fork() process that we are ready. */ | |
885 | if (opt_daemon || opt_background) { | |
886 | if (uatomic_sub_return(<tng_relay_ready, 1) == 0) { | |
887 | kill(child_ppid, SIGUSR1); | |
888 | } | |
889 | } | |
890 | } | |
891 | ||
b8aa1682 JD |
892 | /* |
893 | * Init thread quit pipe. | |
894 | * | |
895 | * Return -1 on error or 0 if all pipes are created. | |
896 | */ | |
7591bab1 | 897 | static int init_thread_quit_pipe(void) |
b8aa1682 | 898 | { |
67609994 JG |
899 | return fd_tracker_util_pipe_open_cloexec( |
900 | the_fd_tracker, "Quit pipe", thread_quit_pipe); | |
b8aa1682 JD |
901 | } |
902 | ||
bcee2b96 JG |
903 | /* |
904 | * Init health quit pipe. | |
905 | * | |
906 | * Return -1 on error or 0 if all pipes are created. | |
907 | */ | |
908 | static int init_health_quit_pipe(void) | |
909 | { | |
910 | return fd_tracker_util_pipe_open_cloexec(the_fd_tracker, | |
911 | "Health quit pipe", health_quit_pipe); | |
912 | } | |
913 | ||
b8aa1682 JD |
914 | /* |
915 | * Create a poll set with O_CLOEXEC and add the thread quit pipe to the set. | |
916 | */ | |
e32a0864 JG |
917 | static int create_named_thread_poll_set(struct lttng_poll_event *events, |
918 | int size, const char *name) | |
b8aa1682 JD |
919 | { |
920 | int ret; | |
921 | ||
922 | if (events == NULL || size == 0) { | |
923 | ret = -1; | |
924 | goto error; | |
925 | } | |
926 | ||
e32a0864 | 927 | ret = fd_tracker_util_poll_create(the_fd_tracker, |
f118099a | 928 | name, events, 1, LTTNG_CLOEXEC); |
64e2c0ed JG |
929 | if (ret) { |
930 | PERROR("Failed to create \"%s\" poll file descriptor", name); | |
931 | goto error; | |
932 | } | |
b8aa1682 JD |
933 | |
934 | /* Add quit pipe */ | |
c7759e6a | 935 | ret = lttng_poll_add(events, thread_quit_pipe[0], LPOLLIN | LPOLLERR); |
b8aa1682 JD |
936 | if (ret < 0) { |
937 | goto error; | |
938 | } | |
939 | ||
940 | return 0; | |
941 | ||
942 | error: | |
943 | return ret; | |
944 | } | |
945 | ||
946 | /* | |
947 | * Check if the thread quit pipe was triggered. | |
948 | * | |
949 | * Return 1 if it was triggered else 0; | |
950 | */ | |
7591bab1 | 951 | static int check_thread_quit_pipe(int fd, uint32_t events) |
b8aa1682 JD |
952 | { |
953 | if (fd == thread_quit_pipe[0] && (events & LPOLLIN)) { | |
954 | return 1; | |
955 | } | |
956 | ||
957 | return 0; | |
958 | } | |
959 | ||
40212d87 JG |
960 | static int create_sock(void *data, int *out_fd) |
961 | { | |
962 | int ret; | |
ac497a37 | 963 | struct lttcomm_sock *sock = (lttcomm_sock *) data; |
40212d87 JG |
964 | |
965 | ret = lttcomm_create_sock(sock); | |
966 | if (ret < 0) { | |
967 | goto end; | |
968 | } | |
969 | ||
970 | *out_fd = sock->fd; | |
971 | end: | |
972 | return ret; | |
973 | } | |
974 | ||
975 | static int close_sock(void *data, int *in_fd) | |
976 | { | |
ac497a37 | 977 | struct lttcomm_sock *sock = (lttcomm_sock *) data; |
40212d87 JG |
978 | |
979 | return sock->ops->close(sock); | |
980 | } | |
981 | ||
f355467e JG |
982 | static int accept_sock(void *data, int *out_fd) |
983 | { | |
984 | int ret = 0; | |
985 | /* Socks is an array of in_sock, out_sock. */ | |
ac497a37 | 986 | struct lttcomm_sock **socks = (lttcomm_sock **) data; |
f355467e JG |
987 | struct lttcomm_sock *in_sock = socks[0]; |
988 | ||
f118099a | 989 | socks[1] = in_sock->ops->accept(in_sock); |
f355467e JG |
990 | if (!socks[1]) { |
991 | ret = -1; | |
992 | goto end; | |
993 | } | |
994 | *out_fd = socks[1]->fd; | |
995 | end: | |
996 | return ret; | |
997 | } | |
998 | ||
b8aa1682 JD |
999 | /* |
1000 | * Create and init socket from uri. | |
1001 | */ | |
40212d87 JG |
1002 | static struct lttcomm_sock *relay_socket_create(struct lttng_uri *uri, |
1003 | const char *name) | |
b8aa1682 | 1004 | { |
40212d87 | 1005 | int ret, sock_fd; |
b8aa1682 | 1006 | struct lttcomm_sock *sock = NULL; |
40212d87 JG |
1007 | char uri_str[PATH_MAX]; |
1008 | char *formated_name = NULL; | |
b8aa1682 JD |
1009 | |
1010 | sock = lttcomm_alloc_sock_from_uri(uri); | |
1011 | if (sock == NULL) { | |
1012 | ERR("Allocating socket"); | |
1013 | goto error; | |
1014 | } | |
1015 | ||
40212d87 JG |
1016 | /* |
1017 | * Don't fail to create the socket if the name can't be built as it is | |
1018 | * only used for debugging purposes. | |
1019 | */ | |
1020 | ret = uri_to_str_url(uri, uri_str, sizeof(uri_str)); | |
1021 | uri_str[sizeof(uri_str) - 1] = '\0'; | |
1022 | if (ret >= 0) { | |
1023 | ret = asprintf(&formated_name, "%s socket @ %s", name, | |
1024 | uri_str); | |
1025 | if (ret < 0) { | |
1026 | formated_name = NULL; | |
1027 | } | |
b8aa1682 | 1028 | } |
40212d87 JG |
1029 | |
1030 | ret = fd_tracker_open_unsuspendable_fd(the_fd_tracker, &sock_fd, | |
1031 | (const char **) (formated_name ? &formated_name : NULL), | |
1032 | 1, create_sock, sock); | |
6016eb62 JG |
1033 | if (ret) { |
1034 | PERROR("Failed to open \"%s\" relay socket", | |
1035 | formated_name ?: "Unknown"); | |
1036 | goto error; | |
1037 | } | |
40212d87 | 1038 | DBG("Listening on %s socket %d", name, sock->fd); |
b8aa1682 JD |
1039 | |
1040 | ret = sock->ops->bind(sock); | |
1041 | if (ret < 0) { | |
2288467f | 1042 | PERROR("Failed to bind socket"); |
b8aa1682 JD |
1043 | goto error; |
1044 | } | |
1045 | ||
1046 | ret = sock->ops->listen(sock, -1); | |
1047 | if (ret < 0) { | |
1048 | goto error; | |
1049 | ||
1050 | } | |
1051 | ||
6016eb62 | 1052 | free(formated_name); |
b8aa1682 JD |
1053 | return sock; |
1054 | ||
1055 | error: | |
1056 | if (sock) { | |
1057 | lttcomm_destroy_sock(sock); | |
1058 | } | |
6016eb62 | 1059 | free(formated_name); |
b8aa1682 JD |
1060 | return NULL; |
1061 | } | |
1062 | ||
f355467e JG |
1063 | static |
1064 | struct lttcomm_sock *accept_relayd_sock(struct lttcomm_sock *listening_sock, | |
1065 | const char *name) | |
1066 | { | |
1067 | int out_fd, ret; | |
1068 | struct lttcomm_sock *socks[2] = { listening_sock, NULL }; | |
1069 | struct lttcomm_sock *new_sock = NULL; | |
1070 | ||
f118099a | 1071 | ret = fd_tracker_open_unsuspendable_fd( |
f355467e JG |
1072 | the_fd_tracker, &out_fd, |
1073 | (const char **) &name, | |
1074 | 1, accept_sock, &socks); | |
1075 | if (ret) { | |
1076 | goto end; | |
1077 | } | |
1078 | new_sock = socks[1]; | |
1079 | DBG("%s accepted, socket %d", name, new_sock->fd); | |
1080 | end: | |
1081 | return new_sock; | |
1082 | } | |
1083 | ||
b8aa1682 JD |
1084 | /* |
1085 | * This thread manages the listening for new connections on the network | |
1086 | */ | |
7591bab1 | 1087 | static void *relay_thread_listener(void *data) |
b8aa1682 | 1088 | { |
095a4ae5 | 1089 | int i, ret, pollfd, err = -1; |
b8aa1682 JD |
1090 | uint32_t revents, nb_fd; |
1091 | struct lttng_poll_event events; | |
1092 | struct lttcomm_sock *control_sock, *data_sock; | |
1093 | ||
b8aa1682 JD |
1094 | DBG("[thread] Relay listener started"); |
1095 | ||
8fba2b8d | 1096 | rcu_register_thread(); |
55706a7d MD |
1097 | health_register(health_relayd, HEALTH_RELAYD_TYPE_LISTENER); |
1098 | ||
f385ae0a MD |
1099 | health_code_update(); |
1100 | ||
40212d87 | 1101 | control_sock = relay_socket_create(control_uri, "Control listener"); |
b8aa1682 | 1102 | if (!control_sock) { |
095a4ae5 | 1103 | goto error_sock_control; |
b8aa1682 JD |
1104 | } |
1105 | ||
40212d87 | 1106 | data_sock = relay_socket_create(data_uri, "Data listener"); |
b8aa1682 | 1107 | if (!data_sock) { |
095a4ae5 | 1108 | goto error_sock_relay; |
b8aa1682 JD |
1109 | } |
1110 | ||
1111 | /* | |
7591bab1 MD |
1112 | * Pass 3 as size here for the thread quit pipe, control and |
1113 | * data socket. | |
b8aa1682 | 1114 | */ |
ba9cf8e1 | 1115 | ret = create_named_thread_poll_set(&events, 3, "Listener thread epoll"); |
b8aa1682 JD |
1116 | if (ret < 0) { |
1117 | goto error_create_poll; | |
1118 | } | |
1119 | ||
1120 | /* Add the control socket */ | |
1121 | ret = lttng_poll_add(&events, control_sock->fd, LPOLLIN | LPOLLRDHUP); | |
1122 | if (ret < 0) { | |
1123 | goto error_poll_add; | |
1124 | } | |
1125 | ||
1126 | /* Add the data socket */ | |
1127 | ret = lttng_poll_add(&events, data_sock->fd, LPOLLIN | LPOLLRDHUP); | |
1128 | if (ret < 0) { | |
1129 | goto error_poll_add; | |
1130 | } | |
1131 | ||
3fd27398 MD |
1132 | lttng_relay_notify_ready(); |
1133 | ||
9b5e0863 MD |
1134 | if (testpoint(relayd_thread_listener)) { |
1135 | goto error_testpoint; | |
1136 | } | |
1137 | ||
b8aa1682 | 1138 | while (1) { |
f385ae0a MD |
1139 | health_code_update(); |
1140 | ||
b8aa1682 JD |
1141 | DBG("Listener accepting connections"); |
1142 | ||
b8aa1682 | 1143 | restart: |
f385ae0a | 1144 | health_poll_entry(); |
b8aa1682 | 1145 | ret = lttng_poll_wait(&events, -1); |
f385ae0a | 1146 | health_poll_exit(); |
b8aa1682 JD |
1147 | if (ret < 0) { |
1148 | /* | |
1149 | * Restart interrupted system call. | |
1150 | */ | |
1151 | if (errno == EINTR) { | |
1152 | goto restart; | |
1153 | } | |
1154 | goto error; | |
1155 | } | |
1156 | ||
0d9c5d77 DG |
1157 | nb_fd = ret; |
1158 | ||
b8aa1682 JD |
1159 | DBG("Relay new connection received"); |
1160 | for (i = 0; i < nb_fd; i++) { | |
f385ae0a MD |
1161 | health_code_update(); |
1162 | ||
b8aa1682 JD |
1163 | /* Fetch once the poll data */ |
1164 | revents = LTTNG_POLL_GETEV(&events, i); | |
1165 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1166 | ||
1167 | /* Thread quit pipe has been closed. Killing thread. */ | |
1168 | ret = check_thread_quit_pipe(pollfd, revents); | |
1169 | if (ret) { | |
095a4ae5 MD |
1170 | err = 0; |
1171 | goto exit; | |
b8aa1682 JD |
1172 | } |
1173 | ||
03e43155 | 1174 | if (revents & LPOLLIN) { |
4b7f17b2 | 1175 | /* |
7591bab1 MD |
1176 | * A new connection is requested, therefore a |
1177 | * sessiond/consumerd connection is allocated in | |
1178 | * this thread, enqueued to a global queue and | |
1179 | * dequeued (and freed) in the worker thread. | |
4b7f17b2 | 1180 | */ |
58eb9381 DG |
1181 | int val = 1; |
1182 | struct relay_connection *new_conn; | |
f355467e | 1183 | struct lttcomm_sock *newsock = NULL; |
7591bab1 | 1184 | enum connection_type type; |
b8aa1682 JD |
1185 | |
1186 | if (pollfd == data_sock->fd) { | |
7591bab1 | 1187 | type = RELAY_DATA; |
f355467e JG |
1188 | newsock = accept_relayd_sock(data_sock, |
1189 | "Data socket to relayd"); | |
4b7f17b2 | 1190 | } else { |
a0377dfe | 1191 | LTTNG_ASSERT(pollfd == control_sock->fd); |
7591bab1 | 1192 | type = RELAY_CONTROL; |
875e3164 JG |
1193 | newsock = accept_relayd_sock(control_sock, |
1194 | "Control socket to relayd"); | |
b8aa1682 | 1195 | } |
58eb9381 DG |
1196 | if (!newsock) { |
1197 | PERROR("accepting sock"); | |
58eb9381 DG |
1198 | goto error; |
1199 | } | |
1200 | ||
1201 | ret = setsockopt(newsock->fd, SOL_SOCKET, SO_REUSEADDR, &val, | |
1202 | sizeof(val)); | |
b8aa1682 JD |
1203 | if (ret < 0) { |
1204 | PERROR("setsockopt inet"); | |
4b7f17b2 | 1205 | lttcomm_destroy_sock(newsock); |
b8aa1682 JD |
1206 | goto error; |
1207 | } | |
f056029c JR |
1208 | |
1209 | ret = socket_apply_keep_alive_config(newsock->fd); | |
1210 | if (ret < 0) { | |
1211 | ERR("Failed to apply TCP keep-alive configuration on socket (%i)", | |
1212 | newsock->fd); | |
1213 | lttcomm_destroy_sock(newsock); | |
1214 | goto error; | |
1215 | } | |
1216 | ||
7591bab1 MD |
1217 | new_conn = connection_create(newsock, type); |
1218 | if (!new_conn) { | |
1219 | lttcomm_destroy_sock(newsock); | |
1220 | goto error; | |
1221 | } | |
58eb9381 DG |
1222 | |
1223 | /* Enqueue request for the dispatcher thread. */ | |
ac497a37 SM |
1224 | cds_wfcq_head_ptr_t head; |
1225 | head.h = &relay_conn_queue.head; | |
1226 | cds_wfcq_enqueue(head, &relay_conn_queue.tail, | |
8bdee6e2 | 1227 | &new_conn->qnode); |
b8aa1682 JD |
1228 | |
1229 | /* | |
7591bab1 MD |
1230 | * Wake the dispatch queue futex. |
1231 | * Implicit memory barrier with the | |
1232 | * exchange in cds_wfcq_enqueue. | |
b8aa1682 | 1233 | */ |
58eb9381 | 1234 | futex_nto1_wake(&relay_conn_queue.futex); |
03e43155 MD |
1235 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
1236 | ERR("socket poll error"); | |
1237 | goto error; | |
1238 | } else { | |
1239 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
1240 | goto error; | |
b8aa1682 JD |
1241 | } |
1242 | } | |
1243 | } | |
1244 | ||
095a4ae5 | 1245 | exit: |
b8aa1682 JD |
1246 | error: |
1247 | error_poll_add: | |
9b5e0863 | 1248 | error_testpoint: |
ba9cf8e1 | 1249 | (void) fd_tracker_util_poll_clean(the_fd_tracker, &events); |
b8aa1682 | 1250 | error_create_poll: |
095a4ae5 | 1251 | if (data_sock->fd >= 0) { |
40212d87 JG |
1252 | int data_sock_fd = data_sock->fd; |
1253 | ||
1254 | ret = fd_tracker_close_unsuspendable_fd(the_fd_tracker, | |
1255 | &data_sock_fd, 1, close_sock, | |
1256 | data_sock); | |
b8aa1682 | 1257 | if (ret) { |
40212d87 | 1258 | PERROR("Failed to close the data listener socket file descriptor"); |
b8aa1682 | 1259 | } |
40212d87 | 1260 | data_sock->fd = -1; |
b8aa1682 | 1261 | } |
095a4ae5 MD |
1262 | lttcomm_destroy_sock(data_sock); |
1263 | error_sock_relay: | |
1264 | if (control_sock->fd >= 0) { | |
40212d87 JG |
1265 | int control_sock_fd = control_sock->fd; |
1266 | ||
1267 | ret = fd_tracker_close_unsuspendable_fd(the_fd_tracker, | |
1268 | &control_sock_fd, 1, close_sock, | |
1269 | control_sock); | |
b8aa1682 | 1270 | if (ret) { |
40212d87 | 1271 | PERROR("Failed to close the control listener socket file descriptor"); |
b8aa1682 | 1272 | } |
40212d87 | 1273 | control_sock->fd = -1; |
b8aa1682 | 1274 | } |
095a4ae5 MD |
1275 | lttcomm_destroy_sock(control_sock); |
1276 | error_sock_control: | |
1277 | if (err) { | |
f385ae0a MD |
1278 | health_error(); |
1279 | ERR("Health error occurred in %s", __func__); | |
095a4ae5 | 1280 | } |
55706a7d | 1281 | health_unregister(health_relayd); |
8fba2b8d | 1282 | rcu_unregister_thread(); |
b8aa1682 | 1283 | DBG("Relay listener thread cleanup complete"); |
b4aacfdc | 1284 | lttng_relay_stop_threads(); |
b8aa1682 JD |
1285 | return NULL; |
1286 | } | |
1287 | ||
1288 | /* | |
1289 | * This thread manages the dispatching of the requests to worker threads | |
1290 | */ | |
7591bab1 | 1291 | static void *relay_thread_dispatcher(void *data) |
b8aa1682 | 1292 | { |
6cd525e8 MD |
1293 | int err = -1; |
1294 | ssize_t ret; | |
8bdee6e2 | 1295 | struct cds_wfcq_node *node; |
58eb9381 | 1296 | struct relay_connection *new_conn = NULL; |
b8aa1682 JD |
1297 | |
1298 | DBG("[thread] Relay dispatcher started"); | |
1299 | ||
55706a7d MD |
1300 | health_register(health_relayd, HEALTH_RELAYD_TYPE_DISPATCHER); |
1301 | ||
9b5e0863 MD |
1302 | if (testpoint(relayd_thread_dispatcher)) { |
1303 | goto error_testpoint; | |
1304 | } | |
1305 | ||
f385ae0a MD |
1306 | health_code_update(); |
1307 | ||
0ed3b1a8 | 1308 | for (;;) { |
f385ae0a MD |
1309 | health_code_update(); |
1310 | ||
b8aa1682 | 1311 | /* Atomically prepare the queue futex */ |
58eb9381 | 1312 | futex_nto1_prepare(&relay_conn_queue.futex); |
b8aa1682 | 1313 | |
0ed3b1a8 MD |
1314 | if (CMM_LOAD_SHARED(dispatch_thread_exit)) { |
1315 | break; | |
1316 | } | |
1317 | ||
b8aa1682 | 1318 | do { |
f385ae0a MD |
1319 | health_code_update(); |
1320 | ||
b8aa1682 | 1321 | /* Dequeue commands */ |
8bdee6e2 SM |
1322 | node = cds_wfcq_dequeue_blocking(&relay_conn_queue.head, |
1323 | &relay_conn_queue.tail); | |
b8aa1682 JD |
1324 | if (node == NULL) { |
1325 | DBG("Woken up but nothing in the relay command queue"); | |
1326 | /* Continue thread execution */ | |
1327 | break; | |
1328 | } | |
58eb9381 | 1329 | new_conn = caa_container_of(node, struct relay_connection, qnode); |
b8aa1682 | 1330 | |
58eb9381 | 1331 | DBG("Dispatching request waiting on sock %d", new_conn->sock->fd); |
b8aa1682 JD |
1332 | |
1333 | /* | |
7591bab1 MD |
1334 | * Inform worker thread of the new request. This |
1335 | * call is blocking so we can be assured that | |
1336 | * the data will be read at some point in time | |
1337 | * or wait to the end of the world :) | |
b8aa1682 | 1338 | */ |
58eb9381 DG |
1339 | ret = lttng_write(relay_conn_pipe[1], &new_conn, sizeof(new_conn)); |
1340 | if (ret < 0) { | |
1341 | PERROR("write connection pipe"); | |
7591bab1 | 1342 | connection_put(new_conn); |
b8aa1682 JD |
1343 | goto error; |
1344 | } | |
1345 | } while (node != NULL); | |
1346 | ||
1347 | /* Futex wait on queue. Blocking call on futex() */ | |
f385ae0a | 1348 | health_poll_entry(); |
58eb9381 | 1349 | futex_nto1_wait(&relay_conn_queue.futex); |
f385ae0a | 1350 | health_poll_exit(); |
b8aa1682 JD |
1351 | } |
1352 | ||
f385ae0a MD |
1353 | /* Normal exit, no error */ |
1354 | err = 0; | |
1355 | ||
b8aa1682 | 1356 | error: |
9b5e0863 | 1357 | error_testpoint: |
f385ae0a MD |
1358 | if (err) { |
1359 | health_error(); | |
1360 | ERR("Health error occurred in %s", __func__); | |
1361 | } | |
55706a7d | 1362 | health_unregister(health_relayd); |
b8aa1682 | 1363 | DBG("Dispatch thread dying"); |
b4aacfdc | 1364 | lttng_relay_stop_threads(); |
b8aa1682 JD |
1365 | return NULL; |
1366 | } | |
1367 | ||
298a25ca JG |
1368 | static bool session_streams_have_index(const struct relay_session *session) |
1369 | { | |
1370 | return session->minor >= 4 && !session->snapshot; | |
1371 | } | |
1372 | ||
c5b6f4f0 DG |
1373 | /* |
1374 | * Handle the RELAYD_CREATE_SESSION command. | |
1375 | * | |
1376 | * On success, send back the session id or else return a negative value. | |
1377 | */ | |
5312a3ed JG |
1378 | static int relay_create_session(const struct lttcomm_relayd_hdr *recv_hdr, |
1379 | struct relay_connection *conn, | |
1380 | const struct lttng_buffer_view *payload) | |
c5b6f4f0 | 1381 | { |
5312a3ed JG |
1382 | int ret = 0; |
1383 | ssize_t send_ret; | |
4c6885d2 | 1384 | struct relay_session *session = NULL; |
ecd1a12f | 1385 | struct lttcomm_relayd_create_session_reply_2_11 reply = {}; |
1e791a74 JG |
1386 | char session_name[LTTNG_NAME_MAX] = {}; |
1387 | char hostname[LTTNG_HOST_NAME_MAX] = {}; | |
7591bab1 MD |
1388 | uint32_t live_timer = 0; |
1389 | bool snapshot = false; | |
46ef2188 | 1390 | bool session_name_contains_creation_timestamp = false; |
23c8ff50 | 1391 | /* Left nil for peers < 2.11. */ |
6fa5fe7c | 1392 | char base_path[LTTNG_PATH_MAX] = {}; |
23c8ff50 | 1393 | lttng_uuid sessiond_uuid = {}; |
1e791a74 JG |
1394 | LTTNG_OPTIONAL(uint64_t) id_sessiond = {}; |
1395 | LTTNG_OPTIONAL(uint64_t) current_chunk_id = {}; | |
db1da059 | 1396 | LTTNG_OPTIONAL(time_t) creation_time = {}; |
ecd1a12f MD |
1397 | struct lttng_dynamic_buffer reply_payload; |
1398 | ||
1399 | lttng_dynamic_buffer_init(&reply_payload); | |
c5b6f4f0 | 1400 | |
f86f6389 JR |
1401 | if (conn->minor < 4) { |
1402 | /* From 2.1 to 2.3 */ | |
1403 | ret = 0; | |
1404 | } else if (conn->minor >= 4 && conn->minor < 11) { | |
1405 | /* From 2.4 to 2.10 */ | |
5312a3ed | 1406 | ret = cmd_create_session_2_4(payload, session_name, |
7591bab1 | 1407 | hostname, &live_timer, &snapshot); |
f86f6389 | 1408 | } else { |
84fa4db5 | 1409 | bool has_current_chunk; |
db1da059 JG |
1410 | uint64_t current_chunk_id_value; |
1411 | time_t creation_time_value; | |
1412 | uint64_t id_sessiond_value; | |
84fa4db5 | 1413 | |
f86f6389 | 1414 | /* From 2.11 to ... */ |
db1da059 | 1415 | ret = cmd_create_session_2_11(payload, session_name, hostname, |
6fa5fe7c | 1416 | base_path, &live_timer, &snapshot, &id_sessiond_value, |
db1da059 | 1417 | sessiond_uuid, &has_current_chunk, |
46ef2188 MD |
1418 | ¤t_chunk_id_value, &creation_time_value, |
1419 | &session_name_contains_creation_timestamp); | |
23c8ff50 JG |
1420 | if (lttng_uuid_is_nil(sessiond_uuid)) { |
1421 | /* The nil UUID is reserved for pre-2.11 clients. */ | |
1422 | ERR("Illegal nil UUID announced by peer in create session command"); | |
1423 | ret = -1; | |
1424 | goto send_reply; | |
1425 | } | |
db1da059 JG |
1426 | LTTNG_OPTIONAL_SET(&id_sessiond, id_sessiond_value); |
1427 | LTTNG_OPTIONAL_SET(&creation_time, creation_time_value); | |
1428 | if (has_current_chunk) { | |
1429 | LTTNG_OPTIONAL_SET(¤t_chunk_id, | |
1430 | current_chunk_id_value); | |
1431 | } | |
7591bab1 | 1432 | } |
f86f6389 | 1433 | |
7591bab1 MD |
1434 | if (ret < 0) { |
1435 | goto send_reply; | |
d3e2ba59 JD |
1436 | } |
1437 | ||
6fa5fe7c | 1438 | session = session_create(session_name, hostname, base_path, live_timer, |
1e791a74 JG |
1439 | snapshot, sessiond_uuid, |
1440 | id_sessiond.is_set ? &id_sessiond.value : NULL, | |
1441 | current_chunk_id.is_set ? ¤t_chunk_id.value : NULL, | |
db1da059 | 1442 | creation_time.is_set ? &creation_time.value : NULL, |
46ef2188 MD |
1443 | conn->major, conn->minor, |
1444 | session_name_contains_creation_timestamp); | |
7591bab1 MD |
1445 | if (!session) { |
1446 | ret = -1; | |
1447 | goto send_reply; | |
1448 | } | |
a0377dfe | 1449 | LTTNG_ASSERT(!conn->session); |
7591bab1 | 1450 | conn->session = session; |
c5b6f4f0 DG |
1451 | DBG("Created session %" PRIu64, session->id); |
1452 | ||
ecd1a12f | 1453 | reply.generic.session_id = htobe64(session->id); |
7591bab1 MD |
1454 | |
1455 | send_reply: | |
c5b6f4f0 | 1456 | if (ret < 0) { |
ecd1a12f | 1457 | reply.generic.ret_code = htobe32(LTTNG_ERR_FATAL); |
c5b6f4f0 | 1458 | } else { |
ecd1a12f | 1459 | reply.generic.ret_code = htobe32(LTTNG_OK); |
c5b6f4f0 DG |
1460 | } |
1461 | ||
ecd1a12f MD |
1462 | if (conn->minor < 11) { |
1463 | /* From 2.1 to 2.10 */ | |
1464 | ret = lttng_dynamic_buffer_append(&reply_payload, | |
1465 | &reply.generic, sizeof(reply.generic)); | |
1466 | if (ret) { | |
1467 | ERR("Failed to append \"create session\" command reply header to payload buffer"); | |
1468 | ret = -1; | |
1469 | goto end; | |
1470 | } | |
1471 | } else { | |
1472 | const uint32_t output_path_length = | |
8d382dd4 | 1473 | session ? strlen(session->output_path) + 1 : 0; |
ecd1a12f MD |
1474 | |
1475 | reply.output_path_length = htobe32(output_path_length); | |
8d382dd4 JG |
1476 | ret = lttng_dynamic_buffer_append( |
1477 | &reply_payload, &reply, sizeof(reply)); | |
ecd1a12f MD |
1478 | if (ret) { |
1479 | ERR("Failed to append \"create session\" command reply header to payload buffer"); | |
1480 | goto end; | |
1481 | } | |
1482 | ||
8d382dd4 JG |
1483 | if (output_path_length) { |
1484 | ret = lttng_dynamic_buffer_append(&reply_payload, | |
1485 | session->output_path, | |
1486 | output_path_length); | |
1487 | if (ret) { | |
1488 | ERR("Failed to append \"create session\" command reply path to payload buffer"); | |
1489 | goto end; | |
1490 | } | |
ecd1a12f MD |
1491 | } |
1492 | } | |
1493 | ||
1494 | send_ret = conn->sock->ops->sendmsg(conn->sock, reply_payload.data, | |
1495 | reply_payload.size, 0); | |
1496 | if (send_ret < (ssize_t) reply_payload.size) { | |
1497 | ERR("Failed to send \"create session\" command reply of %zu bytes (ret = %zd)", | |
1498 | reply_payload.size, send_ret); | |
5312a3ed | 1499 | ret = -1; |
c5b6f4f0 | 1500 | } |
ecd1a12f | 1501 | end: |
4c6885d2 JG |
1502 | if (ret < 0 && session) { |
1503 | session_put(session); | |
1504 | } | |
ecd1a12f | 1505 | lttng_dynamic_buffer_reset(&reply_payload); |
c5b6f4f0 DG |
1506 | return ret; |
1507 | } | |
1508 | ||
a4baae1b JD |
1509 | /* |
1510 | * When we have received all the streams and the metadata for a channel, | |
1511 | * we make them visible to the viewer threads. | |
1512 | */ | |
7591bab1 | 1513 | static void publish_connection_local_streams(struct relay_connection *conn) |
a4baae1b | 1514 | { |
7591bab1 MD |
1515 | struct relay_stream *stream; |
1516 | struct relay_session *session = conn->session; | |
a4baae1b | 1517 | |
7591bab1 MD |
1518 | /* |
1519 | * We publish all streams belonging to a session atomically wrt | |
1520 | * session lock. | |
1521 | */ | |
1522 | pthread_mutex_lock(&session->lock); | |
1523 | rcu_read_lock(); | |
1524 | cds_list_for_each_entry_rcu(stream, &session->recv_list, | |
1525 | recv_node) { | |
1526 | stream_publish(stream); | |
a4baae1b | 1527 | } |
7591bab1 | 1528 | rcu_read_unlock(); |
a4baae1b | 1529 | |
7591bab1 MD |
1530 | /* |
1531 | * Inform the viewer that there are new streams in the session. | |
1532 | */ | |
1533 | if (session->viewer_attached) { | |
1534 | uatomic_set(&session->new_streams, 1); | |
1535 | } | |
1536 | pthread_mutex_unlock(&session->lock); | |
a4baae1b JD |
1537 | } |
1538 | ||
348a81dc JG |
1539 | static int conform_channel_path(char *channel_path) |
1540 | { | |
1541 | int ret = 0; | |
1542 | ||
1543 | if (strstr("../", channel_path)) { | |
1544 | ERR("Refusing channel path as it walks up the path hierarchy: \"%s\"", | |
1545 | channel_path); | |
1546 | ret = -1; | |
1547 | goto end; | |
1548 | } | |
1549 | ||
1550 | if (*channel_path == '/') { | |
1551 | const size_t len = strlen(channel_path); | |
1552 | ||
1553 | /* | |
1554 | * Channel paths from peers prior to 2.11 are expressed as an | |
1555 | * absolute path that is, in reality, relative to the relay | |
1556 | * daemon's output directory. Remove the leading slash so it | |
1557 | * is correctly interpreted as a relative path later on. | |
1558 | * | |
1559 | * len (and not len - 1) is used to copy the trailing NULL. | |
1560 | */ | |
1561 | bcopy(channel_path + 1, channel_path, len); | |
1562 | } | |
1563 | end: | |
1564 | return ret; | |
1565 | } | |
1566 | ||
b8aa1682 JD |
1567 | /* |
1568 | * relay_add_stream: allocate a new stream for a session | |
1569 | */ | |
5312a3ed JG |
1570 | static int relay_add_stream(const struct lttcomm_relayd_hdr *recv_hdr, |
1571 | struct relay_connection *conn, | |
1572 | const struct lttng_buffer_view *payload) | |
b8aa1682 | 1573 | { |
7591bab1 MD |
1574 | int ret; |
1575 | ssize_t send_ret; | |
58eb9381 | 1576 | struct relay_session *session = conn->session; |
b8aa1682 JD |
1577 | struct relay_stream *stream = NULL; |
1578 | struct lttcomm_relayd_status_stream reply; | |
4030a636 | 1579 | struct ctf_trace *trace = NULL; |
7591bab1 MD |
1580 | uint64_t stream_handle = -1ULL; |
1581 | char *path_name = NULL, *channel_name = NULL; | |
1582 | uint64_t tracefile_size = 0, tracefile_count = 0; | |
348a81dc | 1583 | LTTNG_OPTIONAL(uint64_t) stream_chunk_id = {}; |
b8aa1682 | 1584 | |
5312a3ed | 1585 | if (!session || !conn->version_check_done) { |
b8aa1682 JD |
1586 | ERR("Trying to add a stream before version check"); |
1587 | ret = -1; | |
1588 | goto end_no_session; | |
1589 | } | |
1590 | ||
2f21a469 JR |
1591 | if (session->minor == 1) { |
1592 | /* For 2.1 */ | |
5312a3ed | 1593 | ret = cmd_recv_stream_2_1(payload, &path_name, |
7591bab1 | 1594 | &channel_name); |
2f21a469 JR |
1595 | } else if (session->minor > 1 && session->minor < 11) { |
1596 | /* From 2.2 to 2.10 */ | |
5312a3ed | 1597 | ret = cmd_recv_stream_2_2(payload, &path_name, |
7591bab1 | 1598 | &channel_name, &tracefile_size, &tracefile_count); |
2f21a469 JR |
1599 | } else { |
1600 | /* From 2.11 to ... */ | |
1601 | ret = cmd_recv_stream_2_11(payload, &path_name, | |
0b50e4b3 JG |
1602 | &channel_name, &tracefile_size, &tracefile_count, |
1603 | &stream_chunk_id.value); | |
1604 | stream_chunk_id.is_set = true; | |
0f907de1 | 1605 | } |
2f21a469 | 1606 | |
0f907de1 | 1607 | if (ret < 0) { |
7591bab1 | 1608 | goto send_reply; |
b8aa1682 JD |
1609 | } |
1610 | ||
348a81dc JG |
1611 | if (conform_channel_path(path_name)) { |
1612 | goto send_reply; | |
1613 | } | |
1614 | ||
2a635488 JR |
1615 | /* |
1616 | * Backward compatibility for --group-output-by-session. | |
1617 | * Prior to lttng 2.11, the complete path is passed by the stream. | |
1618 | * Starting at 2.11, lttng-relayd uses chunk. When dealing with producer | |
1619 | * >=2.11 the chunk is responsible for the output path. When dealing | |
1620 | * with producer < 2.11 the chunk output_path is the root output path | |
1621 | * and the stream carries the complete path (path_name). | |
1622 | * To support --group-output-by-session with older producer (<2.11), we | |
1623 | * need to craft the path based on the stream path. | |
1624 | */ | |
1625 | if (opt_group_output_by == RELAYD_GROUP_OUTPUT_BY_SESSION) { | |
1626 | if (conn->minor < 4) { | |
1627 | /* | |
1628 | * From 2.1 to 2.3, the session_name is not passed on | |
1629 | * the RELAYD_CREATE_SESSION command. The session name | |
1630 | * is necessary to detect the presence of a base_path | |
1631 | * inside the stream path. Without it we cannot perform | |
1632 | * a valid group-output-by-session transformation. | |
1633 | */ | |
1634 | WARN("Unable to perform a --group-by-session transformation for session %" PRIu64 | |
1635 | " for stream with path \"%s\" as it is produced by a peer using a protocol older than v2.4", | |
1636 | session->id, path_name); | |
1637 | } else if (conn->minor >= 4 && conn->minor < 11) { | |
1638 | char *group_by_session_path_name; | |
1639 | ||
a0377dfe | 1640 | LTTNG_ASSERT(session->session_name[0] != '\0'); |
2a635488 JR |
1641 | |
1642 | group_by_session_path_name = | |
1643 | backward_compat_group_by_session( | |
1644 | path_name, | |
d2cb4a90 JG |
1645 | session->session_name, |
1646 | session->creation_time.value); | |
2a635488 JR |
1647 | if (!group_by_session_path_name) { |
1648 | ERR("Failed to apply group by session to stream of session %" PRIu64, | |
1649 | session->id); | |
1650 | goto send_reply; | |
1651 | } | |
1652 | ||
1653 | DBG("Transformed session path from \"%s\" to \"%s\" to honor per-session name grouping", | |
1654 | path_name, group_by_session_path_name); | |
1655 | ||
1656 | free(path_name); | |
1657 | path_name = group_by_session_path_name; | |
1658 | } | |
1659 | } | |
1660 | ||
7591bab1 | 1661 | trace = ctf_trace_get_by_path_or_create(session, path_name); |
2a174661 | 1662 | if (!trace) { |
7591bab1 | 1663 | goto send_reply; |
2a174661 | 1664 | } |
2a174661 | 1665 | |
2a635488 | 1666 | /* This stream here has one reference on the trace. */ |
7591bab1 MD |
1667 | pthread_mutex_lock(&last_relay_stream_id_lock); |
1668 | stream_handle = ++last_relay_stream_id; | |
1669 | pthread_mutex_unlock(&last_relay_stream_id_lock); | |
d3e2ba59 | 1670 | |
7591bab1 MD |
1671 | /* We pass ownership of path_name and channel_name. */ |
1672 | stream = stream_create(trace, stream_handle, path_name, | |
348a81dc | 1673 | channel_name, tracefile_size, tracefile_count); |
7591bab1 MD |
1674 | path_name = NULL; |
1675 | channel_name = NULL; | |
a4baae1b | 1676 | |
2a174661 | 1677 | /* |
7591bab1 MD |
1678 | * Streams are the owners of their trace. Reference to trace is |
1679 | * kept within stream_create(). | |
2a174661 | 1680 | */ |
7591bab1 | 1681 | ctf_trace_put(trace); |
d3e2ba59 | 1682 | |
7591bab1 | 1683 | send_reply: |
53efb85a | 1684 | memset(&reply, 0, sizeof(reply)); |
7591bab1 MD |
1685 | reply.handle = htobe64(stream_handle); |
1686 | if (!stream) { | |
f73fabfd | 1687 | reply.ret_code = htobe32(LTTNG_ERR_UNK); |
b8aa1682 | 1688 | } else { |
f73fabfd | 1689 | reply.ret_code = htobe32(LTTNG_OK); |
b8aa1682 | 1690 | } |
5af40280 | 1691 | |
58eb9381 | 1692 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, |
b8aa1682 | 1693 | sizeof(struct lttcomm_relayd_status_stream), 0); |
5312a3ed JG |
1694 | if (send_ret < (ssize_t) sizeof(reply)) { |
1695 | ERR("Failed to send \"add stream\" command reply (ret = %zd)", | |
1696 | send_ret); | |
1697 | ret = -1; | |
b8aa1682 JD |
1698 | } |
1699 | ||
1700 | end_no_session: | |
7591bab1 MD |
1701 | free(path_name); |
1702 | free(channel_name); | |
0f907de1 | 1703 | return ret; |
b8aa1682 JD |
1704 | } |
1705 | ||
173af62f DG |
1706 | /* |
1707 | * relay_close_stream: close a specific stream | |
1708 | */ | |
5312a3ed JG |
1709 | static int relay_close_stream(const struct lttcomm_relayd_hdr *recv_hdr, |
1710 | struct relay_connection *conn, | |
1711 | const struct lttng_buffer_view *payload) | |
173af62f | 1712 | { |
5312a3ed JG |
1713 | int ret; |
1714 | ssize_t send_ret; | |
58eb9381 | 1715 | struct relay_session *session = conn->session; |
173af62f DG |
1716 | struct lttcomm_relayd_close_stream stream_info; |
1717 | struct lttcomm_relayd_generic_reply reply; | |
1718 | struct relay_stream *stream; | |
173af62f DG |
1719 | |
1720 | DBG("Close stream received"); | |
1721 | ||
5312a3ed | 1722 | if (!session || !conn->version_check_done) { |
173af62f DG |
1723 | ERR("Trying to close a stream before version check"); |
1724 | ret = -1; | |
1725 | goto end_no_session; | |
1726 | } | |
1727 | ||
5312a3ed JG |
1728 | if (payload->size < sizeof(stream_info)) { |
1729 | ERR("Unexpected payload size in \"relay_close_stream\": expected >= %zu bytes, got %zu bytes", | |
1730 | sizeof(stream_info), payload->size); | |
173af62f DG |
1731 | ret = -1; |
1732 | goto end_no_session; | |
1733 | } | |
5312a3ed JG |
1734 | memcpy(&stream_info, payload->data, sizeof(stream_info)); |
1735 | stream_info.stream_id = be64toh(stream_info.stream_id); | |
1736 | stream_info.last_net_seq_num = be64toh(stream_info.last_net_seq_num); | |
173af62f | 1737 | |
5312a3ed | 1738 | stream = stream_get_by_id(stream_info.stream_id); |
173af62f DG |
1739 | if (!stream) { |
1740 | ret = -1; | |
7591bab1 | 1741 | goto end; |
173af62f | 1742 | } |
77f7bd85 MD |
1743 | |
1744 | /* | |
1745 | * Set last_net_seq_num before the close flag. Required by data | |
1746 | * pending check. | |
1747 | */ | |
7591bab1 | 1748 | pthread_mutex_lock(&stream->lock); |
5312a3ed | 1749 | stream->last_net_seq_num = stream_info.last_net_seq_num; |
77f7bd85 MD |
1750 | pthread_mutex_unlock(&stream->lock); |
1751 | ||
bda7c7b9 JG |
1752 | /* |
1753 | * This is one of the conditions which may trigger a stream close | |
1754 | * with the others being: | |
1755 | * 1) A close command is received for a stream | |
1756 | * 2) The control connection owning the stream is closed | |
1757 | * 3) We have received all of the stream's data _after_ a close | |
1758 | * request. | |
1759 | */ | |
1760 | try_stream_close(stream); | |
7591bab1 | 1761 | stream_put(stream); |
5312a3ed | 1762 | ret = 0; |
173af62f | 1763 | |
7591bab1 | 1764 | end: |
53efb85a | 1765 | memset(&reply, 0, sizeof(reply)); |
173af62f | 1766 | if (ret < 0) { |
f73fabfd | 1767 | reply.ret_code = htobe32(LTTNG_ERR_UNK); |
173af62f | 1768 | } else { |
f73fabfd | 1769 | reply.ret_code = htobe32(LTTNG_OK); |
173af62f | 1770 | } |
58eb9381 | 1771 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, |
173af62f | 1772 | sizeof(struct lttcomm_relayd_generic_reply), 0); |
5312a3ed JG |
1773 | if (send_ret < (ssize_t) sizeof(reply)) { |
1774 | ERR("Failed to send \"close stream\" command reply (ret = %zd)", | |
1775 | send_ret); | |
1776 | ret = -1; | |
173af62f DG |
1777 | } |
1778 | ||
1779 | end_no_session: | |
1780 | return ret; | |
1781 | } | |
1782 | ||
93ec662e JD |
1783 | /* |
1784 | * relay_reset_metadata: reset a metadata stream | |
1785 | */ | |
1786 | static | |
5312a3ed JG |
1787 | int relay_reset_metadata(const struct lttcomm_relayd_hdr *recv_hdr, |
1788 | struct relay_connection *conn, | |
1789 | const struct lttng_buffer_view *payload) | |
93ec662e | 1790 | { |
5312a3ed JG |
1791 | int ret; |
1792 | ssize_t send_ret; | |
93ec662e JD |
1793 | struct relay_session *session = conn->session; |
1794 | struct lttcomm_relayd_reset_metadata stream_info; | |
1795 | struct lttcomm_relayd_generic_reply reply; | |
1796 | struct relay_stream *stream; | |
1797 | ||
1798 | DBG("Reset metadata received"); | |
1799 | ||
5312a3ed | 1800 | if (!session || !conn->version_check_done) { |
93ec662e JD |
1801 | ERR("Trying to reset a metadata stream before version check"); |
1802 | ret = -1; | |
1803 | goto end_no_session; | |
1804 | } | |
1805 | ||
5312a3ed JG |
1806 | if (payload->size < sizeof(stream_info)) { |
1807 | ERR("Unexpected payload size in \"relay_reset_metadata\": expected >= %zu bytes, got %zu bytes", | |
1808 | sizeof(stream_info), payload->size); | |
93ec662e JD |
1809 | ret = -1; |
1810 | goto end_no_session; | |
1811 | } | |
5312a3ed JG |
1812 | memcpy(&stream_info, payload->data, sizeof(stream_info)); |
1813 | stream_info.stream_id = be64toh(stream_info.stream_id); | |
1814 | stream_info.version = be64toh(stream_info.version); | |
1815 | ||
1816 | DBG("Update metadata to version %" PRIu64, stream_info.version); | |
93ec662e JD |
1817 | |
1818 | /* Unsupported for live sessions for now. */ | |
1819 | if (session->live_timer != 0) { | |
1820 | ret = -1; | |
1821 | goto end; | |
1822 | } | |
1823 | ||
5312a3ed | 1824 | stream = stream_get_by_id(stream_info.stream_id); |
93ec662e JD |
1825 | if (!stream) { |
1826 | ret = -1; | |
1827 | goto end; | |
1828 | } | |
1829 | pthread_mutex_lock(&stream->lock); | |
1830 | if (!stream->is_metadata) { | |
1831 | ret = -1; | |
1832 | goto end_unlock; | |
1833 | } | |
1834 | ||
c35f9726 | 1835 | ret = stream_reset_file(stream); |
93ec662e | 1836 | if (ret < 0) { |
c35f9726 JG |
1837 | ERR("Failed to reset metadata stream %" PRIu64 |
1838 | ": stream_path = %s, channel = %s", | |
1839 | stream->stream_handle, stream->path_name, | |
1840 | stream->channel_name); | |
93ec662e JD |
1841 | goto end_unlock; |
1842 | } | |
93ec662e JD |
1843 | end_unlock: |
1844 | pthread_mutex_unlock(&stream->lock); | |
1845 | stream_put(stream); | |
1846 | ||
1847 | end: | |
1848 | memset(&reply, 0, sizeof(reply)); | |
1849 | if (ret < 0) { | |
1850 | reply.ret_code = htobe32(LTTNG_ERR_UNK); | |
1851 | } else { | |
1852 | reply.ret_code = htobe32(LTTNG_OK); | |
1853 | } | |
1854 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, | |
1855 | sizeof(struct lttcomm_relayd_generic_reply), 0); | |
5312a3ed JG |
1856 | if (send_ret < (ssize_t) sizeof(reply)) { |
1857 | ERR("Failed to send \"reset metadata\" command reply (ret = %zd)", | |
1858 | send_ret); | |
1859 | ret = -1; | |
93ec662e JD |
1860 | } |
1861 | ||
1862 | end_no_session: | |
1863 | return ret; | |
1864 | } | |
1865 | ||
b8aa1682 JD |
1866 | /* |
1867 | * relay_unknown_command: send -1 if received unknown command | |
1868 | */ | |
7591bab1 | 1869 | static void relay_unknown_command(struct relay_connection *conn) |
b8aa1682 JD |
1870 | { |
1871 | struct lttcomm_relayd_generic_reply reply; | |
5312a3ed | 1872 | ssize_t send_ret; |
b8aa1682 | 1873 | |
53efb85a | 1874 | memset(&reply, 0, sizeof(reply)); |
f73fabfd | 1875 | reply.ret_code = htobe32(LTTNG_ERR_UNK); |
5312a3ed JG |
1876 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
1877 | if (send_ret < sizeof(reply)) { | |
1878 | ERR("Failed to send \"unknown command\" command reply (ret = %zd)", send_ret); | |
b8aa1682 JD |
1879 | } |
1880 | } | |
1881 | ||
1882 | /* | |
1883 | * relay_start: send an acknowledgment to the client to tell if we are | |
1884 | * ready to receive data. We are ready if a session is established. | |
1885 | */ | |
5312a3ed JG |
1886 | static int relay_start(const struct lttcomm_relayd_hdr *recv_hdr, |
1887 | struct relay_connection *conn, | |
1888 | const struct lttng_buffer_view *payload) | |
b8aa1682 | 1889 | { |
5312a3ed JG |
1890 | int ret = 0; |
1891 | ssize_t send_ret; | |
b8aa1682 | 1892 | struct lttcomm_relayd_generic_reply reply; |
58eb9381 | 1893 | struct relay_session *session = conn->session; |
b8aa1682 JD |
1894 | |
1895 | if (!session) { | |
1896 | DBG("Trying to start the streaming without a session established"); | |
f73fabfd | 1897 | ret = htobe32(LTTNG_ERR_UNK); |
b8aa1682 JD |
1898 | } |
1899 | ||
53efb85a | 1900 | memset(&reply, 0, sizeof(reply)); |
5312a3ed JG |
1901 | reply.ret_code = htobe32(LTTNG_OK); |
1902 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, | |
1903 | sizeof(reply), 0); | |
1904 | if (send_ret < (ssize_t) sizeof(reply)) { | |
1905 | ERR("Failed to send \"relay_start\" command reply (ret = %zd)", | |
1906 | send_ret); | |
1907 | ret = -1; | |
b8aa1682 JD |
1908 | } |
1909 | ||
1910 | return ret; | |
1911 | } | |
1912 | ||
b8aa1682 | 1913 | /* |
7591bab1 | 1914 | * relay_recv_metadata: receive the metadata for the session. |
b8aa1682 | 1915 | */ |
5312a3ed JG |
1916 | static int relay_recv_metadata(const struct lttcomm_relayd_hdr *recv_hdr, |
1917 | struct relay_connection *conn, | |
1918 | const struct lttng_buffer_view *payload) | |
b8aa1682 | 1919 | { |
32d1569c | 1920 | int ret = 0; |
58eb9381 | 1921 | struct relay_session *session = conn->session; |
5312a3ed | 1922 | struct lttcomm_relayd_metadata_payload metadata_payload_header; |
b8aa1682 | 1923 | struct relay_stream *metadata_stream; |
5312a3ed | 1924 | uint64_t metadata_payload_size; |
c35f9726 | 1925 | struct lttng_buffer_view packet_view; |
b8aa1682 JD |
1926 | |
1927 | if (!session) { | |
1928 | ERR("Metadata sent before version check"); | |
1929 | ret = -1; | |
1930 | goto end; | |
1931 | } | |
1932 | ||
5312a3ed | 1933 | if (recv_hdr->data_size < sizeof(struct lttcomm_relayd_metadata_payload)) { |
f6416125 MD |
1934 | ERR("Incorrect data size"); |
1935 | ret = -1; | |
1936 | goto end; | |
1937 | } | |
5312a3ed JG |
1938 | metadata_payload_size = recv_hdr->data_size - |
1939 | sizeof(struct lttcomm_relayd_metadata_payload); | |
f6416125 | 1940 | |
5312a3ed JG |
1941 | memcpy(&metadata_payload_header, payload->data, |
1942 | sizeof(metadata_payload_header)); | |
1943 | metadata_payload_header.stream_id = be64toh( | |
1944 | metadata_payload_header.stream_id); | |
1945 | metadata_payload_header.padding_size = be32toh( | |
1946 | metadata_payload_header.padding_size); | |
9d1bbf21 | 1947 | |
5312a3ed | 1948 | metadata_stream = stream_get_by_id(metadata_payload_header.stream_id); |
b8aa1682 JD |
1949 | if (!metadata_stream) { |
1950 | ret = -1; | |
7591bab1 | 1951 | goto end; |
b8aa1682 JD |
1952 | } |
1953 | ||
c35f9726 JG |
1954 | packet_view = lttng_buffer_view_from_view(payload, |
1955 | sizeof(metadata_payload_header), metadata_payload_size); | |
3e6e0df2 | 1956 | if (!lttng_buffer_view_is_valid(&packet_view)) { |
c35f9726 | 1957 | ERR("Invalid metadata packet length announced by header"); |
b8aa1682 | 1958 | ret = -1; |
7591bab1 | 1959 | goto end_put; |
b8aa1682 | 1960 | } |
1d4dfdef | 1961 | |
c35f9726 JG |
1962 | pthread_mutex_lock(&metadata_stream->lock); |
1963 | ret = stream_write(metadata_stream, &packet_view, | |
5312a3ed | 1964 | metadata_payload_header.padding_size); |
c35f9726 JG |
1965 | pthread_mutex_unlock(&metadata_stream->lock); |
1966 | if (ret){ | |
5312a3ed | 1967 | ret = -1; |
7591bab1 | 1968 | goto end_put; |
1d4dfdef | 1969 | } |
7591bab1 | 1970 | end_put: |
7591bab1 | 1971 | stream_put(metadata_stream); |
b8aa1682 JD |
1972 | end: |
1973 | return ret; | |
1974 | } | |
1975 | ||
1976 | /* | |
1977 | * relay_send_version: send relayd version number | |
1978 | */ | |
5312a3ed JG |
1979 | static int relay_send_version(const struct lttcomm_relayd_hdr *recv_hdr, |
1980 | struct relay_connection *conn, | |
1981 | const struct lttng_buffer_view *payload) | |
b8aa1682 | 1982 | { |
7f51dcba | 1983 | int ret; |
5312a3ed | 1984 | ssize_t send_ret; |
092b6259 | 1985 | struct lttcomm_relayd_version reply, msg; |
87cb6359 | 1986 | bool compatible = true; |
b8aa1682 | 1987 | |
5312a3ed | 1988 | conn->version_check_done = true; |
b8aa1682 | 1989 | |
092b6259 | 1990 | /* Get version from the other side. */ |
5312a3ed JG |
1991 | if (payload->size < sizeof(msg)) { |
1992 | ERR("Unexpected payload size in \"relay_send_version\": expected >= %zu bytes, got %zu bytes", | |
1993 | sizeof(msg), payload->size); | |
092b6259 | 1994 | ret = -1; |
092b6259 DG |
1995 | goto end; |
1996 | } | |
1997 | ||
5312a3ed JG |
1998 | memcpy(&msg, payload->data, sizeof(msg)); |
1999 | msg.major = be32toh(msg.major); | |
2000 | msg.minor = be32toh(msg.minor); | |
2001 | ||
53efb85a | 2002 | memset(&reply, 0, sizeof(reply)); |
d83a952c MD |
2003 | reply.major = RELAYD_VERSION_COMM_MAJOR; |
2004 | reply.minor = RELAYD_VERSION_COMM_MINOR; | |
d4519fa3 JD |
2005 | |
2006 | /* Major versions must be the same */ | |
5312a3ed | 2007 | if (reply.major != msg.major) { |
6151a90f | 2008 | DBG("Incompatible major versions (%u vs %u), deleting session", |
5312a3ed | 2009 | reply.major, msg.major); |
87cb6359 | 2010 | compatible = false; |
d4519fa3 JD |
2011 | } |
2012 | ||
58eb9381 | 2013 | conn->major = reply.major; |
0f907de1 | 2014 | /* We adapt to the lowest compatible version */ |
5312a3ed | 2015 | if (reply.minor <= msg.minor) { |
58eb9381 | 2016 | conn->minor = reply.minor; |
0f907de1 | 2017 | } else { |
5312a3ed | 2018 | conn->minor = msg.minor; |
0f907de1 JD |
2019 | } |
2020 | ||
6151a90f JD |
2021 | reply.major = htobe32(reply.major); |
2022 | reply.minor = htobe32(reply.minor); | |
5312a3ed JG |
2023 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, |
2024 | sizeof(reply), 0); | |
2025 | if (send_ret < (ssize_t) sizeof(reply)) { | |
2026 | ERR("Failed to send \"send version\" command reply (ret = %zd)", | |
2027 | send_ret); | |
2028 | ret = -1; | |
2029 | goto end; | |
2030 | } else { | |
2031 | ret = 0; | |
6151a90f JD |
2032 | } |
2033 | ||
87cb6359 JD |
2034 | if (!compatible) { |
2035 | ret = -1; | |
2036 | goto end; | |
2037 | } | |
2038 | ||
58eb9381 DG |
2039 | DBG("Version check done using protocol %u.%u", conn->major, |
2040 | conn->minor); | |
b8aa1682 JD |
2041 | |
2042 | end: | |
2043 | return ret; | |
2044 | } | |
2045 | ||
c8f59ee5 | 2046 | /* |
6d805429 | 2047 | * Check for data pending for a given stream id from the session daemon. |
c8f59ee5 | 2048 | */ |
5312a3ed JG |
2049 | static int relay_data_pending(const struct lttcomm_relayd_hdr *recv_hdr, |
2050 | struct relay_connection *conn, | |
2051 | const struct lttng_buffer_view *payload) | |
c8f59ee5 | 2052 | { |
58eb9381 | 2053 | struct relay_session *session = conn->session; |
6d805429 | 2054 | struct lttcomm_relayd_data_pending msg; |
c8f59ee5 DG |
2055 | struct lttcomm_relayd_generic_reply reply; |
2056 | struct relay_stream *stream; | |
5312a3ed | 2057 | ssize_t send_ret; |
c8f59ee5 | 2058 | int ret; |
298a25ca | 2059 | uint64_t stream_seq; |
c8f59ee5 | 2060 | |
6d805429 | 2061 | DBG("Data pending command received"); |
c8f59ee5 | 2062 | |
5312a3ed | 2063 | if (!session || !conn->version_check_done) { |
c8f59ee5 DG |
2064 | ERR("Trying to check for data before version check"); |
2065 | ret = -1; | |
2066 | goto end_no_session; | |
2067 | } | |
2068 | ||
5312a3ed JG |
2069 | if (payload->size < sizeof(msg)) { |
2070 | ERR("Unexpected payload size in \"relay_data_pending\": expected >= %zu bytes, got %zu bytes", | |
2071 | sizeof(msg), payload->size); | |
c8f59ee5 DG |
2072 | ret = -1; |
2073 | goto end_no_session; | |
2074 | } | |
5312a3ed JG |
2075 | memcpy(&msg, payload->data, sizeof(msg)); |
2076 | msg.stream_id = be64toh(msg.stream_id); | |
2077 | msg.last_net_seq_num = be64toh(msg.last_net_seq_num); | |
c8f59ee5 | 2078 | |
5312a3ed | 2079 | stream = stream_get_by_id(msg.stream_id); |
de91f48a | 2080 | if (stream == NULL) { |
c8f59ee5 | 2081 | ret = -1; |
7591bab1 | 2082 | goto end; |
c8f59ee5 DG |
2083 | } |
2084 | ||
7591bab1 MD |
2085 | pthread_mutex_lock(&stream->lock); |
2086 | ||
298a25ca JG |
2087 | if (session_streams_have_index(session)) { |
2088 | /* | |
2089 | * Ensure that both the index and stream data have been | |
2090 | * flushed up to the requested point. | |
2091 | */ | |
ac497a37 | 2092 | stream_seq = std::min(stream->prev_data_seq, stream->prev_index_seq); |
298a25ca | 2093 | } else { |
a8f9f353 | 2094 | stream_seq = stream->prev_data_seq; |
298a25ca | 2095 | } |
a8f9f353 | 2096 | DBG("Data pending for stream id %" PRIu64 ": prev_data_seq %" PRIu64 |
298a25ca JG |
2097 | ", prev_index_seq %" PRIu64 |
2098 | ", and last_seq %" PRIu64, msg.stream_id, | |
a8f9f353 | 2099 | stream->prev_data_seq, stream->prev_index_seq, |
298a25ca | 2100 | msg.last_net_seq_num); |
c8f59ee5 | 2101 | |
33832e64 | 2102 | /* Avoid wrapping issue */ |
298a25ca | 2103 | if (((int64_t) (stream_seq - msg.last_net_seq_num)) >= 0) { |
6d805429 | 2104 | /* Data has in fact been written and is NOT pending */ |
c8f59ee5 | 2105 | ret = 0; |
6d805429 DG |
2106 | } else { |
2107 | /* Data still being streamed thus pending */ | |
2108 | ret = 1; | |
c8f59ee5 DG |
2109 | } |
2110 | ||
7591bab1 MD |
2111 | stream->data_pending_check_done = true; |
2112 | pthread_mutex_unlock(&stream->lock); | |
f7079f67 | 2113 | |
7591bab1 MD |
2114 | stream_put(stream); |
2115 | end: | |
c8f59ee5 | 2116 | |
53efb85a | 2117 | memset(&reply, 0, sizeof(reply)); |
c8f59ee5 | 2118 | reply.ret_code = htobe32(ret); |
5312a3ed JG |
2119 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
2120 | if (send_ret < (ssize_t) sizeof(reply)) { | |
2121 | ERR("Failed to send \"data pending\" command reply (ret = %zd)", | |
2122 | send_ret); | |
2123 | ret = -1; | |
c8f59ee5 DG |
2124 | } |
2125 | ||
2126 | end_no_session: | |
2127 | return ret; | |
2128 | } | |
2129 | ||
2130 | /* | |
2131 | * Wait for the control socket to reach a quiescent state. | |
2132 | * | |
7591bab1 MD |
2133 | * Note that for now, when receiving this command from the session |
2134 | * daemon, this means that every subsequent commands or data received on | |
2135 | * the control socket has been handled. So, this is why we simply return | |
2136 | * OK here. | |
c8f59ee5 | 2137 | */ |
5312a3ed JG |
2138 | static int relay_quiescent_control(const struct lttcomm_relayd_hdr *recv_hdr, |
2139 | struct relay_connection *conn, | |
2140 | const struct lttng_buffer_view *payload) | |
c8f59ee5 DG |
2141 | { |
2142 | int ret; | |
5312a3ed | 2143 | ssize_t send_ret; |
ad7051c0 | 2144 | struct relay_stream *stream; |
ad7051c0 | 2145 | struct lttcomm_relayd_quiescent_control msg; |
c8f59ee5 DG |
2146 | struct lttcomm_relayd_generic_reply reply; |
2147 | ||
2148 | DBG("Checking quiescent state on control socket"); | |
2149 | ||
5312a3ed | 2150 | if (!conn->session || !conn->version_check_done) { |
ad7051c0 DG |
2151 | ERR("Trying to check for data before version check"); |
2152 | ret = -1; | |
2153 | goto end_no_session; | |
2154 | } | |
2155 | ||
5312a3ed JG |
2156 | if (payload->size < sizeof(msg)) { |
2157 | ERR("Unexpected payload size in \"relay_quiescent_control\": expected >= %zu bytes, got %zu bytes", | |
2158 | sizeof(msg), payload->size); | |
ad7051c0 DG |
2159 | ret = -1; |
2160 | goto end_no_session; | |
2161 | } | |
5312a3ed JG |
2162 | memcpy(&msg, payload->data, sizeof(msg)); |
2163 | msg.stream_id = be64toh(msg.stream_id); | |
ad7051c0 | 2164 | |
5312a3ed | 2165 | stream = stream_get_by_id(msg.stream_id); |
7591bab1 MD |
2166 | if (!stream) { |
2167 | goto reply; | |
2168 | } | |
2169 | pthread_mutex_lock(&stream->lock); | |
2170 | stream->data_pending_check_done = true; | |
2171 | pthread_mutex_unlock(&stream->lock); | |
5312a3ed JG |
2172 | |
2173 | DBG("Relay quiescent control pending flag set to %" PRIu64, msg.stream_id); | |
7591bab1 MD |
2174 | stream_put(stream); |
2175 | reply: | |
53efb85a | 2176 | memset(&reply, 0, sizeof(reply)); |
c8f59ee5 | 2177 | reply.ret_code = htobe32(LTTNG_OK); |
5312a3ed JG |
2178 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
2179 | if (send_ret < (ssize_t) sizeof(reply)) { | |
2180 | ERR("Failed to send \"quiescent control\" command reply (ret = %zd)", | |
2181 | send_ret); | |
2182 | ret = -1; | |
2183 | } else { | |
2184 | ret = 0; | |
c8f59ee5 DG |
2185 | } |
2186 | ||
ad7051c0 | 2187 | end_no_session: |
c8f59ee5 DG |
2188 | return ret; |
2189 | } | |
2190 | ||
f7079f67 | 2191 | /* |
7591bab1 MD |
2192 | * Initialize a data pending command. This means that a consumer is about |
2193 | * to ask for data pending for each stream it holds. Simply iterate over | |
2194 | * all streams of a session and set the data_pending_check_done flag. | |
f7079f67 DG |
2195 | * |
2196 | * This command returns to the client a LTTNG_OK code. | |
2197 | */ | |
5312a3ed JG |
2198 | static int relay_begin_data_pending(const struct lttcomm_relayd_hdr *recv_hdr, |
2199 | struct relay_connection *conn, | |
2200 | const struct lttng_buffer_view *payload) | |
f7079f67 DG |
2201 | { |
2202 | int ret; | |
5312a3ed | 2203 | ssize_t send_ret; |
f7079f67 DG |
2204 | struct lttng_ht_iter iter; |
2205 | struct lttcomm_relayd_begin_data_pending msg; | |
2206 | struct lttcomm_relayd_generic_reply reply; | |
2207 | struct relay_stream *stream; | |
f7079f67 | 2208 | |
a0377dfe FD |
2209 | LTTNG_ASSERT(recv_hdr); |
2210 | LTTNG_ASSERT(conn); | |
f7079f67 DG |
2211 | |
2212 | DBG("Init streams for data pending"); | |
2213 | ||
5312a3ed | 2214 | if (!conn->session || !conn->version_check_done) { |
f7079f67 DG |
2215 | ERR("Trying to check for data before version check"); |
2216 | ret = -1; | |
2217 | goto end_no_session; | |
2218 | } | |
2219 | ||
5312a3ed JG |
2220 | if (payload->size < sizeof(msg)) { |
2221 | ERR("Unexpected payload size in \"relay_begin_data_pending\": expected >= %zu bytes, got %zu bytes", | |
2222 | sizeof(msg), payload->size); | |
f7079f67 DG |
2223 | ret = -1; |
2224 | goto end_no_session; | |
2225 | } | |
5312a3ed JG |
2226 | memcpy(&msg, payload->data, sizeof(msg)); |
2227 | msg.session_id = be64toh(msg.session_id); | |
f7079f67 DG |
2228 | |
2229 | /* | |
7591bab1 MD |
2230 | * Iterate over all streams to set the begin data pending flag. |
2231 | * For now, the streams are indexed by stream handle so we have | |
2232 | * to iterate over all streams to find the one associated with | |
2233 | * the right session_id. | |
f7079f67 DG |
2234 | */ |
2235 | rcu_read_lock(); | |
d3e2ba59 | 2236 | cds_lfht_for_each_entry(relay_streams_ht->ht, &iter.iter, stream, |
2a174661 | 2237 | node.node) { |
7591bab1 MD |
2238 | if (!stream_get(stream)) { |
2239 | continue; | |
2240 | } | |
5312a3ed | 2241 | if (stream->trace->session->id == msg.session_id) { |
7591bab1 MD |
2242 | pthread_mutex_lock(&stream->lock); |
2243 | stream->data_pending_check_done = false; | |
2244 | pthread_mutex_unlock(&stream->lock); | |
f7079f67 DG |
2245 | DBG("Set begin data pending flag to stream %" PRIu64, |
2246 | stream->stream_handle); | |
2247 | } | |
7591bab1 | 2248 | stream_put(stream); |
f7079f67 DG |
2249 | } |
2250 | rcu_read_unlock(); | |
2251 | ||
53efb85a | 2252 | memset(&reply, 0, sizeof(reply)); |
f7079f67 DG |
2253 | /* All good, send back reply. */ |
2254 | reply.ret_code = htobe32(LTTNG_OK); | |
2255 | ||
5312a3ed JG |
2256 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
2257 | if (send_ret < (ssize_t) sizeof(reply)) { | |
2258 | ERR("Failed to send \"begin data pending\" command reply (ret = %zd)", | |
2259 | send_ret); | |
2260 | ret = -1; | |
2261 | } else { | |
2262 | ret = 0; | |
f7079f67 DG |
2263 | } |
2264 | ||
2265 | end_no_session: | |
2266 | return ret; | |
2267 | } | |
2268 | ||
2269 | /* | |
7591bab1 MD |
2270 | * End data pending command. This will check, for a given session id, if |
2271 | * each stream associated with it has its data_pending_check_done flag | |
2272 | * set. If not, this means that the client lost track of the stream but | |
2273 | * the data is still being streamed on our side. In this case, we inform | |
2274 | * the client that data is in flight. | |
f7079f67 DG |
2275 | * |
2276 | * Return to the client if there is data in flight or not with a ret_code. | |
2277 | */ | |
5312a3ed JG |
2278 | static int relay_end_data_pending(const struct lttcomm_relayd_hdr *recv_hdr, |
2279 | struct relay_connection *conn, | |
2280 | const struct lttng_buffer_view *payload) | |
f7079f67 DG |
2281 | { |
2282 | int ret; | |
5312a3ed | 2283 | ssize_t send_ret; |
f7079f67 DG |
2284 | struct lttng_ht_iter iter; |
2285 | struct lttcomm_relayd_end_data_pending msg; | |
2286 | struct lttcomm_relayd_generic_reply reply; | |
2287 | struct relay_stream *stream; | |
f7079f67 DG |
2288 | uint32_t is_data_inflight = 0; |
2289 | ||
f7079f67 DG |
2290 | DBG("End data pending command"); |
2291 | ||
5312a3ed | 2292 | if (!conn->session || !conn->version_check_done) { |
f7079f67 DG |
2293 | ERR("Trying to check for data before version check"); |
2294 | ret = -1; | |
2295 | goto end_no_session; | |
2296 | } | |
2297 | ||
5312a3ed JG |
2298 | if (payload->size < sizeof(msg)) { |
2299 | ERR("Unexpected payload size in \"relay_end_data_pending\": expected >= %zu bytes, got %zu bytes", | |
2300 | sizeof(msg), payload->size); | |
f7079f67 DG |
2301 | ret = -1; |
2302 | goto end_no_session; | |
2303 | } | |
5312a3ed JG |
2304 | memcpy(&msg, payload->data, sizeof(msg)); |
2305 | msg.session_id = be64toh(msg.session_id); | |
f7079f67 | 2306 | |
7591bab1 MD |
2307 | /* |
2308 | * Iterate over all streams to see if the begin data pending | |
2309 | * flag is set. | |
2310 | */ | |
f7079f67 | 2311 | rcu_read_lock(); |
d3e2ba59 | 2312 | cds_lfht_for_each_entry(relay_streams_ht->ht, &iter.iter, stream, |
2a174661 | 2313 | node.node) { |
7591bab1 MD |
2314 | if (!stream_get(stream)) { |
2315 | continue; | |
2316 | } | |
5312a3ed | 2317 | if (stream->trace->session->id != msg.session_id) { |
7591bab1 MD |
2318 | stream_put(stream); |
2319 | continue; | |
2320 | } | |
2321 | pthread_mutex_lock(&stream->lock); | |
2322 | if (!stream->data_pending_check_done) { | |
298a25ca JG |
2323 | uint64_t stream_seq; |
2324 | ||
2325 | if (session_streams_have_index(conn->session)) { | |
2326 | /* | |
2327 | * Ensure that both the index and stream data have been | |
2328 | * flushed up to the requested point. | |
2329 | */ | |
ac497a37 | 2330 | stream_seq = std::min(stream->prev_data_seq, stream->prev_index_seq); |
298a25ca | 2331 | } else { |
a8f9f353 | 2332 | stream_seq = stream->prev_data_seq; |
298a25ca JG |
2333 | } |
2334 | if (!stream->closed || !(((int64_t) (stream_seq - stream->last_net_seq_num)) >= 0)) { | |
7591bab1 MD |
2335 | is_data_inflight = 1; |
2336 | DBG("Data is still in flight for stream %" PRIu64, | |
2337 | stream->stream_handle); | |
2338 | pthread_mutex_unlock(&stream->lock); | |
2339 | stream_put(stream); | |
2340 | break; | |
2341 | } | |
f7079f67 | 2342 | } |
7591bab1 MD |
2343 | pthread_mutex_unlock(&stream->lock); |
2344 | stream_put(stream); | |
f7079f67 DG |
2345 | } |
2346 | rcu_read_unlock(); | |
2347 | ||
53efb85a | 2348 | memset(&reply, 0, sizeof(reply)); |
f7079f67 DG |
2349 | /* All good, send back reply. */ |
2350 | reply.ret_code = htobe32(is_data_inflight); | |
2351 | ||
5312a3ed JG |
2352 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
2353 | if (send_ret < (ssize_t) sizeof(reply)) { | |
2354 | ERR("Failed to send \"end data pending\" command reply (ret = %zd)", | |
2355 | send_ret); | |
2356 | ret = -1; | |
2357 | } else { | |
2358 | ret = 0; | |
f7079f67 DG |
2359 | } |
2360 | ||
2361 | end_no_session: | |
2362 | return ret; | |
2363 | } | |
2364 | ||
1c20f0e2 JD |
2365 | /* |
2366 | * Receive an index for a specific stream. | |
2367 | * | |
2368 | * Return 0 on success else a negative value. | |
2369 | */ | |
5312a3ed JG |
2370 | static int relay_recv_index(const struct lttcomm_relayd_hdr *recv_hdr, |
2371 | struct relay_connection *conn, | |
2372 | const struct lttng_buffer_view *payload) | |
1c20f0e2 | 2373 | { |
5312a3ed JG |
2374 | int ret; |
2375 | ssize_t send_ret; | |
58eb9381 | 2376 | struct relay_session *session = conn->session; |
1c20f0e2 | 2377 | struct lttcomm_relayd_index index_info; |
1c20f0e2 JD |
2378 | struct lttcomm_relayd_generic_reply reply; |
2379 | struct relay_stream *stream; | |
f8f3885c | 2380 | size_t msg_len; |
1c20f0e2 | 2381 | |
a0377dfe | 2382 | LTTNG_ASSERT(conn); |
1c20f0e2 JD |
2383 | |
2384 | DBG("Relay receiving index"); | |
2385 | ||
5312a3ed | 2386 | if (!session || !conn->version_check_done) { |
1c20f0e2 JD |
2387 | ERR("Trying to close a stream before version check"); |
2388 | ret = -1; | |
2389 | goto end_no_session; | |
2390 | } | |
2391 | ||
f8f3885c MD |
2392 | msg_len = lttcomm_relayd_index_len( |
2393 | lttng_to_index_major(conn->major, conn->minor), | |
2394 | lttng_to_index_minor(conn->major, conn->minor)); | |
5312a3ed JG |
2395 | if (payload->size < msg_len) { |
2396 | ERR("Unexpected payload size in \"relay_recv_index\": expected >= %zu bytes, got %zu bytes", | |
2397 | msg_len, payload->size); | |
1c20f0e2 JD |
2398 | ret = -1; |
2399 | goto end_no_session; | |
2400 | } | |
5312a3ed JG |
2401 | memcpy(&index_info, payload->data, msg_len); |
2402 | index_info.relay_stream_id = be64toh(index_info.relay_stream_id); | |
2403 | index_info.net_seq_num = be64toh(index_info.net_seq_num); | |
2404 | index_info.packet_size = be64toh(index_info.packet_size); | |
2405 | index_info.content_size = be64toh(index_info.content_size); | |
2406 | index_info.timestamp_begin = be64toh(index_info.timestamp_begin); | |
2407 | index_info.timestamp_end = be64toh(index_info.timestamp_end); | |
2408 | index_info.events_discarded = be64toh(index_info.events_discarded); | |
2409 | index_info.stream_id = be64toh(index_info.stream_id); | |
81df238b JR |
2410 | |
2411 | if (conn->minor >= 8) { | |
2412 | index_info.stream_instance_id = | |
2413 | be64toh(index_info.stream_instance_id); | |
2414 | index_info.packet_seq_num = be64toh(index_info.packet_seq_num); | |
0f83d1cc MD |
2415 | } else { |
2416 | index_info.stream_instance_id = -1ULL; | |
2417 | index_info.packet_seq_num = -1ULL; | |
81df238b | 2418 | } |
5312a3ed JG |
2419 | |
2420 | stream = stream_get_by_id(index_info.relay_stream_id); | |
1c20f0e2 | 2421 | if (!stream) { |
7591bab1 | 2422 | ERR("stream_get_by_id not found"); |
1c20f0e2 | 2423 | ret = -1; |
7591bab1 | 2424 | goto end; |
1c20f0e2 | 2425 | } |
d3e2ba59 | 2426 | |
c35f9726 JG |
2427 | pthread_mutex_lock(&stream->lock); |
2428 | ret = stream_add_index(stream, &index_info); | |
2429 | pthread_mutex_unlock(&stream->lock); | |
2430 | if (ret) { | |
7591bab1 MD |
2431 | goto end_stream_put; |
2432 | } | |
1c20f0e2 | 2433 | |
7591bab1 | 2434 | end_stream_put: |
7591bab1 | 2435 | stream_put(stream); |
7591bab1 | 2436 | end: |
53efb85a | 2437 | memset(&reply, 0, sizeof(reply)); |
1c20f0e2 JD |
2438 | if (ret < 0) { |
2439 | reply.ret_code = htobe32(LTTNG_ERR_UNK); | |
2440 | } else { | |
2441 | reply.ret_code = htobe32(LTTNG_OK); | |
2442 | } | |
58eb9381 | 2443 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
5312a3ed JG |
2444 | if (send_ret < (ssize_t) sizeof(reply)) { |
2445 | ERR("Failed to send \"recv index\" command reply (ret = %zd)", send_ret); | |
2446 | ret = -1; | |
1c20f0e2 JD |
2447 | } |
2448 | ||
2449 | end_no_session: | |
2450 | return ret; | |
2451 | } | |
2452 | ||
a4baae1b JD |
2453 | /* |
2454 | * Receive the streams_sent message. | |
2455 | * | |
2456 | * Return 0 on success else a negative value. | |
2457 | */ | |
5312a3ed JG |
2458 | static int relay_streams_sent(const struct lttcomm_relayd_hdr *recv_hdr, |
2459 | struct relay_connection *conn, | |
2460 | const struct lttng_buffer_view *payload) | |
a4baae1b | 2461 | { |
5312a3ed JG |
2462 | int ret; |
2463 | ssize_t send_ret; | |
a4baae1b JD |
2464 | struct lttcomm_relayd_generic_reply reply; |
2465 | ||
a0377dfe | 2466 | LTTNG_ASSERT(conn); |
a4baae1b JD |
2467 | |
2468 | DBG("Relay receiving streams_sent"); | |
2469 | ||
5312a3ed | 2470 | if (!conn->session || !conn->version_check_done) { |
a4baae1b JD |
2471 | ERR("Trying to close a stream before version check"); |
2472 | ret = -1; | |
2473 | goto end_no_session; | |
2474 | } | |
2475 | ||
2476 | /* | |
7591bab1 MD |
2477 | * Publish every pending stream in the connection recv list which are |
2478 | * now ready to be used by the viewer. | |
4a9daf17 | 2479 | */ |
7591bab1 | 2480 | publish_connection_local_streams(conn); |
4a9daf17 | 2481 | |
53efb85a | 2482 | memset(&reply, 0, sizeof(reply)); |
a4baae1b | 2483 | reply.ret_code = htobe32(LTTNG_OK); |
58eb9381 | 2484 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
5312a3ed JG |
2485 | if (send_ret < (ssize_t) sizeof(reply)) { |
2486 | ERR("Failed to send \"streams sent\" command reply (ret = %zd)", | |
2487 | send_ret); | |
2488 | ret = -1; | |
a4baae1b JD |
2489 | } else { |
2490 | /* Success. */ | |
2491 | ret = 0; | |
2492 | } | |
2493 | ||
2494 | end_no_session: | |
2495 | return ret; | |
2496 | } | |
2497 | ||
ce9dbd47 JG |
2498 | static ssize_t relay_unpack_rotate_streams_header( |
2499 | const struct lttng_buffer_view *payload, | |
2500 | struct lttcomm_relayd_rotate_streams *_rotate_streams) | |
2501 | { | |
2502 | struct lttcomm_relayd_rotate_streams rotate_streams; | |
2503 | /* | |
2504 | * Set to the smallest version (packed) of `lttcomm_relayd_rotate_streams`. | |
2505 | * This is the smallest version of this structure, but it can be larger; | |
2506 | * this variable is updated once the proper size of the structure is known. | |
2507 | * | |
2508 | * See comment at the declaration of this structure for more information. | |
2509 | */ | |
2510 | ssize_t header_len = sizeof(struct lttcomm_relayd_rotate_streams_packed); | |
2511 | size_t expected_payload_size_no_padding, | |
2512 | expected_payload_size_3_bytes_padding, | |
2513 | expected_payload_size_7_bytes_padding; | |
2514 | ||
2515 | if (payload->size < header_len) { | |
2516 | ERR("Unexpected payload size in \"relay_rotate_session_stream\": expected >= %zu bytes, got %zu bytes", | |
2517 | header_len, payload->size); | |
2518 | goto error; | |
2519 | } | |
2520 | ||
2521 | /* | |
2522 | * Some versions incorrectly omitted the LTTNG_PACKED annotation on the | |
2523 | * `new_chunk_id` optional field of struct lttcomm_relayd_rotate_streams. | |
2524 | * | |
2525 | * We start by "unpacking" `stream_count` to figure out the padding length | |
2526 | * emited by our peer. | |
2527 | */ | |
2528 | memcpy(&rotate_streams.stream_count, payload->data, | |
2529 | sizeof(rotate_streams.stream_count)); | |
2530 | rotate_streams = (typeof(rotate_streams)) { | |
2531 | .stream_count = be32toh(rotate_streams.stream_count), | |
2532 | }; | |
2533 | ||
2534 | /* | |
2535 | * Payload size expected given the possible padding lengths in | |
2536 | * `struct lttcomm_relayd_rotate_streams`. | |
2537 | */ | |
2538 | expected_payload_size_no_padding = (rotate_streams.stream_count * | |
2539 | sizeof(*rotate_streams.rotation_positions)) + | |
2540 | sizeof(lttcomm_relayd_rotate_streams_packed); | |
2541 | expected_payload_size_3_bytes_padding = (rotate_streams.stream_count * | |
2542 | sizeof(*rotate_streams.rotation_positions)) + | |
2543 | sizeof(lttcomm_relayd_rotate_streams_3_bytes_padding); | |
2544 | expected_payload_size_7_bytes_padding = (rotate_streams.stream_count * | |
2545 | sizeof(*rotate_streams.rotation_positions)) + | |
2546 | sizeof(lttcomm_relayd_rotate_streams_7_bytes_padding); | |
2547 | ||
2548 | if (payload->size == expected_payload_size_no_padding) { | |
2549 | struct lttcomm_relayd_rotate_streams_packed packed_rotate_streams; | |
2550 | ||
2551 | /* | |
2552 | * This handles cases where someone might build with | |
2553 | * -fpack-struct or any other toolchain that wouldn't produce | |
2554 | * padding to align `value`. | |
2555 | */ | |
2556 | DBG("Received `struct lttcomm_relayd_rotate_streams` with no padding"); | |
2557 | ||
2558 | header_len = sizeof(packed_rotate_streams); | |
2559 | memcpy(&packed_rotate_streams, payload->data, header_len); | |
2560 | ||
2561 | /* Unpack the packed structure to the natively-packed version. */ | |
2562 | *_rotate_streams = (typeof(*_rotate_streams)) { | |
2563 | .stream_count = be32toh(packed_rotate_streams.stream_count), | |
2564 | .new_chunk_id = (typeof(_rotate_streams->new_chunk_id)) { | |
2565 | .is_set = !!packed_rotate_streams.new_chunk_id.is_set, | |
2566 | .value = be64toh(packed_rotate_streams.new_chunk_id.value), | |
2567 | } | |
2568 | }; | |
2569 | } else if (payload->size == expected_payload_size_3_bytes_padding) { | |
2570 | struct lttcomm_relayd_rotate_streams_3_bytes_padding padded_rotate_streams; | |
2571 | ||
2572 | DBG("Received `struct lttcomm_relayd_rotate_streams` with 3 bytes of padding (4-byte aligned peer)"); | |
2573 | ||
2574 | header_len = sizeof(padded_rotate_streams); | |
2575 | memcpy(&padded_rotate_streams, payload->data, header_len); | |
2576 | ||
2577 | /* Unpack the 3-byte padded structure to the natively-packed version. */ | |
2578 | *_rotate_streams = (typeof(*_rotate_streams)) { | |
2579 | .stream_count = be32toh(padded_rotate_streams.stream_count), | |
2580 | .new_chunk_id = (typeof(_rotate_streams->new_chunk_id)) { | |
2581 | .is_set = !!padded_rotate_streams.new_chunk_id.is_set, | |
2582 | .value = be64toh(padded_rotate_streams.new_chunk_id.value), | |
2583 | } | |
2584 | }; | |
2585 | } else if (payload->size == expected_payload_size_7_bytes_padding) { | |
2586 | struct lttcomm_relayd_rotate_streams_7_bytes_padding padded_rotate_streams; | |
2587 | ||
2588 | DBG("Received `struct lttcomm_relayd_rotate_streams` with 7 bytes of padding (8-byte aligned peer)"); | |
2589 | ||
2590 | header_len = sizeof(padded_rotate_streams); | |
2591 | memcpy(&padded_rotate_streams, payload->data, header_len); | |
2592 | ||
2593 | /* Unpack the 7-byte padded structure to the natively-packed version. */ | |
2594 | *_rotate_streams = (typeof(*_rotate_streams)) { | |
2595 | .stream_count = be32toh(padded_rotate_streams.stream_count), | |
2596 | .new_chunk_id = (typeof(_rotate_streams->new_chunk_id)) { | |
2597 | .is_set = !!padded_rotate_streams.new_chunk_id.is_set, | |
2598 | .value = be64toh(padded_rotate_streams.new_chunk_id.value), | |
2599 | } | |
2600 | }; | |
2601 | ||
2602 | header_len = sizeof(padded_rotate_streams); | |
2603 | } else { | |
2604 | ERR("Unexpected payload size in \"relay_rotate_session_stream\": expected %zu, %zu or %zu bytes, got %zu bytes", | |
2605 | expected_payload_size_no_padding, | |
2606 | expected_payload_size_3_bytes_padding, | |
2607 | expected_payload_size_7_bytes_padding, | |
2608 | payload->size); | |
2609 | goto error; | |
2610 | } | |
2611 | ||
2612 | return header_len; | |
2613 | error: | |
2614 | return -1; | |
2615 | } | |
2616 | ||
d3ecc550 | 2617 | /* |
c35f9726 JG |
2618 | * relay_rotate_session_stream: rotate a stream to a new tracefile for the |
2619 | * session rotation feature (not the tracefile rotation feature). | |
d3ecc550 | 2620 | */ |
c35f9726 JG |
2621 | static int relay_rotate_session_streams( |
2622 | const struct lttcomm_relayd_hdr *recv_hdr, | |
5312a3ed JG |
2623 | struct relay_connection *conn, |
2624 | const struct lttng_buffer_view *payload) | |
d3ecc550 | 2625 | { |
30b9d5ab | 2626 | int ret = 0; |
c35f9726 | 2627 | uint32_t i; |
5312a3ed | 2628 | ssize_t send_ret; |
c35f9726 | 2629 | enum lttng_error_code reply_code = LTTNG_ERR_UNK; |
d3ecc550 | 2630 | struct relay_session *session = conn->session; |
c35f9726 JG |
2631 | struct lttcomm_relayd_rotate_streams rotate_streams; |
2632 | struct lttcomm_relayd_generic_reply reply = {}; | |
2633 | struct relay_stream *stream = NULL; | |
c35f9726 JG |
2634 | struct lttng_trace_chunk *next_trace_chunk = NULL; |
2635 | struct lttng_buffer_view stream_positions; | |
70626904 JG |
2636 | char chunk_id_buf[MAX_INT_DEC_LEN(uint64_t)]; |
2637 | const char *chunk_id_str = "none"; | |
ce9dbd47 | 2638 | ssize_t header_len; |
d3ecc550 | 2639 | |
d3ecc550 JD |
2640 | if (!session || !conn->version_check_done) { |
2641 | ERR("Trying to rotate a stream before version check"); | |
2642 | ret = -1; | |
2643 | goto end_no_reply; | |
2644 | } | |
2645 | ||
2646 | if (session->major == 2 && session->minor < 11) { | |
2647 | ERR("Unsupported feature before 2.11"); | |
2648 | ret = -1; | |
2649 | goto end_no_reply; | |
2650 | } | |
2651 | ||
ce9dbd47 JG |
2652 | header_len = relay_unpack_rotate_streams_header(payload, &rotate_streams); |
2653 | if (header_len < 0) { | |
d3ecc550 JD |
2654 | ret = -1; |
2655 | goto end_no_reply; | |
2656 | } | |
2657 | ||
c35f9726 JG |
2658 | if (rotate_streams.new_chunk_id.is_set) { |
2659 | /* | |
2660 | * Retrieve the trace chunk the stream must transition to. As | |
2661 | * per the protocol, this chunk should have been created | |
2662 | * before this command is received. | |
2663 | */ | |
2664 | next_trace_chunk = sessiond_trace_chunk_registry_get_chunk( | |
2665 | sessiond_trace_chunk_registry, | |
c5c79321 JG |
2666 | session->sessiond_uuid, |
2667 | conn->session->id_sessiond.is_set ? | |
2668 | conn->session->id_sessiond.value : | |
2669 | conn->session->id, | |
c35f9726 JG |
2670 | rotate_streams.new_chunk_id.value); |
2671 | if (!next_trace_chunk) { | |
c70636a7 | 2672 | char uuid_str[LTTNG_UUID_STR_LEN]; |
c35f9726 JG |
2673 | |
2674 | lttng_uuid_to_str(session->sessiond_uuid, uuid_str); | |
2675 | ERR("Unknown next trace chunk in ROTATE_STREAMS command: sessiond_uuid = {%s}, session_id = %" PRIu64 | |
2676 | ", trace_chunk_id = %" PRIu64, | |
2677 | uuid_str, session->id, | |
2678 | rotate_streams.new_chunk_id.value); | |
2679 | reply_code = LTTNG_ERR_INVALID_PROTOCOL; | |
2680 | ret = -1; | |
2681 | goto end; | |
2682 | } | |
70626904 JG |
2683 | |
2684 | ret = snprintf(chunk_id_buf, sizeof(chunk_id_buf), "%" PRIu64, | |
2685 | rotate_streams.new_chunk_id.value); | |
2686 | if (ret < 0 || ret >= sizeof(chunk_id_buf)) { | |
2687 | chunk_id_str = "formatting error"; | |
2688 | } else { | |
2689 | chunk_id_str = chunk_id_buf; | |
2690 | } | |
d3ecc550 JD |
2691 | } |
2692 | ||
70626904 JG |
2693 | DBG("Rotate %" PRIu32 " streams of session \"%s\" to chunk \"%s\"", |
2694 | rotate_streams.stream_count, session->session_name, | |
2695 | chunk_id_str); | |
2696 | ||
c35f9726 | 2697 | stream_positions = lttng_buffer_view_from_view(payload, |
ce9dbd47 | 2698 | header_len, -1); |
c35f9726 JG |
2699 | if (!stream_positions.data || |
2700 | stream_positions.size < | |
2701 | (rotate_streams.stream_count * | |
2702 | sizeof(struct lttcomm_relayd_stream_rotation_position))) { | |
2703 | reply_code = LTTNG_ERR_INVALID_PROTOCOL; | |
d3ecc550 | 2704 | ret = -1; |
5312a3ed | 2705 | goto end; |
d3ecc550 JD |
2706 | } |
2707 | ||
c35f9726 JG |
2708 | for (i = 0; i < rotate_streams.stream_count; i++) { |
2709 | struct lttcomm_relayd_stream_rotation_position *position_comm = | |
2710 | &((typeof(position_comm)) stream_positions.data)[i]; | |
2711 | const struct lttcomm_relayd_stream_rotation_position pos = { | |
2712 | .stream_id = be64toh(position_comm->stream_id), | |
2713 | .rotate_at_seq_num = be64toh( | |
2714 | position_comm->rotate_at_seq_num), | |
2715 | }; | |
5312a3ed | 2716 | |
c35f9726 JG |
2717 | stream = stream_get_by_id(pos.stream_id); |
2718 | if (!stream) { | |
2719 | reply_code = LTTNG_ERR_INVALID; | |
2720 | ret = -1; | |
2721 | goto end; | |
c6db3843 JG |
2722 | } |
2723 | ||
c35f9726 JG |
2724 | pthread_mutex_lock(&stream->lock); |
2725 | ret = stream_set_pending_rotation(stream, next_trace_chunk, | |
2726 | pos.rotate_at_seq_num); | |
2727 | pthread_mutex_unlock(&stream->lock); | |
2728 | if (ret) { | |
2729 | reply_code = LTTNG_ERR_FILE_CREATION_ERROR; | |
2730 | goto end; | |
c6db3843 | 2731 | } |
c35f9726 JG |
2732 | |
2733 | stream_put(stream); | |
2734 | stream = NULL; | |
d3ecc550 JD |
2735 | } |
2736 | ||
c35f9726 | 2737 | reply_code = LTTNG_OK; |
eaeb64a9 | 2738 | ret = 0; |
d3ecc550 | 2739 | end: |
c35f9726 JG |
2740 | if (stream) { |
2741 | stream_put(stream); | |
d3ecc550 | 2742 | } |
c35f9726 JG |
2743 | |
2744 | reply.ret_code = htobe32((uint32_t) reply_code); | |
d3ecc550 JD |
2745 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, |
2746 | sizeof(struct lttcomm_relayd_generic_reply), 0); | |
5312a3ed JG |
2747 | if (send_ret < (ssize_t) sizeof(reply)) { |
2748 | ERR("Failed to send \"rotate session stream\" command reply (ret = %zd)", | |
2749 | send_ret); | |
2750 | ret = -1; | |
d3ecc550 | 2751 | } |
d3ecc550 | 2752 | end_no_reply: |
c35f9726 | 2753 | lttng_trace_chunk_put(next_trace_chunk); |
d3ecc550 JD |
2754 | return ret; |
2755 | } | |
2756 | ||
e5add6d0 JG |
2757 | /* |
2758 | * relay_create_trace_chunk: create a new trace chunk | |
2759 | */ | |
2760 | static int relay_create_trace_chunk(const struct lttcomm_relayd_hdr *recv_hdr, | |
2761 | struct relay_connection *conn, | |
2762 | const struct lttng_buffer_view *payload) | |
2763 | { | |
2764 | int ret = 0; | |
2765 | ssize_t send_ret; | |
2766 | struct relay_session *session = conn->session; | |
2767 | struct lttcomm_relayd_create_trace_chunk *msg; | |
2768 | struct lttcomm_relayd_generic_reply reply = {}; | |
2769 | struct lttng_buffer_view header_view; | |
e5add6d0 JG |
2770 | struct lttng_trace_chunk *chunk = NULL, *published_chunk = NULL; |
2771 | enum lttng_error_code reply_code = LTTNG_OK; | |
2772 | enum lttng_trace_chunk_status chunk_status; | |
a7ceb342 | 2773 | const char *new_path; |
e5add6d0 JG |
2774 | |
2775 | if (!session || !conn->version_check_done) { | |
2776 | ERR("Trying to create a trace chunk before version check"); | |
2777 | ret = -1; | |
2778 | goto end_no_reply; | |
2779 | } | |
2780 | ||
2781 | if (session->major == 2 && session->minor < 11) { | |
2782 | ERR("Chunk creation command is unsupported before 2.11"); | |
2783 | ret = -1; | |
2784 | goto end_no_reply; | |
2785 | } | |
2786 | ||
2787 | header_view = lttng_buffer_view_from_view(payload, 0, sizeof(*msg)); | |
3e6e0df2 | 2788 | if (!lttng_buffer_view_is_valid(&header_view)) { |
e5add6d0 JG |
2789 | ERR("Failed to receive payload of chunk creation command"); |
2790 | ret = -1; | |
2791 | goto end_no_reply; | |
2792 | } | |
2793 | ||
2794 | /* Convert to host endianness. */ | |
2795 | msg = (typeof(msg)) header_view.data; | |
2796 | msg->chunk_id = be64toh(msg->chunk_id); | |
2797 | msg->creation_timestamp = be64toh(msg->creation_timestamp); | |
2798 | msg->override_name_length = be32toh(msg->override_name_length); | |
2799 | ||
8cd15f6a MD |
2800 | pthread_mutex_lock(&conn->session->lock); |
2801 | session->ongoing_rotation = true; | |
a7ceb342 MD |
2802 | if (session->current_trace_chunk && |
2803 | !lttng_trace_chunk_get_name_overridden(session->current_trace_chunk)) { | |
2804 | chunk_status = lttng_trace_chunk_rename_path(session->current_trace_chunk, | |
2805 | DEFAULT_CHUNK_TMP_OLD_DIRECTORY); | |
2806 | if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) { | |
2807 | ERR("Failed to rename old chunk"); | |
2808 | ret = -1; | |
2809 | reply_code = LTTNG_ERR_UNK; | |
2810 | goto end; | |
2811 | } | |
2812 | } | |
a7ceb342 MD |
2813 | if (!session->current_trace_chunk) { |
2814 | if (!session->has_rotated) { | |
2815 | new_path = ""; | |
2816 | } else { | |
2817 | new_path = NULL; | |
2818 | } | |
2819 | } else { | |
2820 | new_path = DEFAULT_CHUNK_TMP_NEW_DIRECTORY; | |
2821 | } | |
e5add6d0 | 2822 | chunk = lttng_trace_chunk_create( |
a7ceb342 | 2823 | msg->chunk_id, msg->creation_timestamp, new_path); |
e5add6d0 JG |
2824 | if (!chunk) { |
2825 | ERR("Failed to create trace chunk in trace chunk creation command"); | |
2826 | ret = -1; | |
2827 | reply_code = LTTNG_ERR_NOMEM; | |
2828 | goto end; | |
2829 | } | |
7145f5e9 | 2830 | lttng_trace_chunk_set_fd_tracker(chunk, the_fd_tracker); |
e5add6d0 JG |
2831 | |
2832 | if (msg->override_name_length) { | |
2833 | const char *name; | |
3e6e0df2 JG |
2834 | const struct lttng_buffer_view chunk_name_view = |
2835 | lttng_buffer_view_from_view(payload, | |
2836 | sizeof(*msg), | |
2837 | msg->override_name_length); | |
2838 | ||
2839 | if (!lttng_buffer_view_is_valid(&chunk_name_view)) { | |
2840 | ERR("Invalid payload of chunk creation command (protocol error): buffer too short for expected name length"); | |
2841 | ret = -1; | |
2842 | reply_code = LTTNG_ERR_INVALID; | |
2843 | goto end; | |
2844 | } | |
e5add6d0 | 2845 | |
e5add6d0 | 2846 | name = chunk_name_view.data; |
3e6e0df2 JG |
2847 | if (name[msg->override_name_length - 1]) { |
2848 | ERR("Invalid payload of chunk creation command (protocol error): name is not null-terminated"); | |
e5add6d0 JG |
2849 | ret = -1; |
2850 | reply_code = LTTNG_ERR_INVALID; | |
2851 | goto end; | |
2852 | } | |
2853 | ||
2854 | chunk_status = lttng_trace_chunk_override_name( | |
2855 | chunk, chunk_name_view.data); | |
2856 | switch (chunk_status) { | |
2857 | case LTTNG_TRACE_CHUNK_STATUS_OK: | |
2858 | break; | |
2859 | case LTTNG_TRACE_CHUNK_STATUS_INVALID_ARGUMENT: | |
2860 | ERR("Failed to set the name of new trace chunk in trace chunk creation command (invalid name)"); | |
2861 | reply_code = LTTNG_ERR_INVALID; | |
2862 | ret = -1; | |
2863 | goto end; | |
2864 | default: | |
2865 | ERR("Failed to set the name of new trace chunk in trace chunk creation command (unknown error)"); | |
2866 | reply_code = LTTNG_ERR_UNK; | |
2867 | ret = -1; | |
2868 | goto end; | |
2869 | } | |
2870 | } | |
2871 | ||
e5add6d0 JG |
2872 | chunk_status = lttng_trace_chunk_set_credentials_current_user(chunk); |
2873 | if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) { | |
2874 | reply_code = LTTNG_ERR_UNK; | |
2875 | ret = -1; | |
2876 | goto end; | |
2877 | } | |
2878 | ||
a0377dfe | 2879 | LTTNG_ASSERT(conn->session->output_directory); |
7ceefac4 JG |
2880 | chunk_status = lttng_trace_chunk_set_as_owner(chunk, |
2881 | conn->session->output_directory); | |
e5add6d0 JG |
2882 | if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) { |
2883 | reply_code = LTTNG_ERR_UNK; | |
2884 | ret = -1; | |
2885 | goto end; | |
2886 | } | |
2887 | ||
2888 | published_chunk = sessiond_trace_chunk_registry_publish_chunk( | |
2889 | sessiond_trace_chunk_registry, | |
2890 | conn->session->sessiond_uuid, | |
c5c79321 JG |
2891 | conn->session->id_sessiond.is_set ? |
2892 | conn->session->id_sessiond.value : | |
2893 | conn->session->id, | |
e5add6d0 JG |
2894 | chunk); |
2895 | if (!published_chunk) { | |
c70636a7 | 2896 | char uuid_str[LTTNG_UUID_STR_LEN]; |
e5add6d0 JG |
2897 | |
2898 | lttng_uuid_to_str(conn->session->sessiond_uuid, uuid_str); | |
2899 | ERR("Failed to publish chunk: sessiond_uuid = %s, session_id = %" PRIu64 ", chunk_id = %" PRIu64, | |
2900 | uuid_str, | |
2901 | conn->session->id, | |
2902 | msg->chunk_id); | |
2903 | ret = -1; | |
2904 | reply_code = LTTNG_ERR_NOMEM; | |
2905 | goto end; | |
2906 | } | |
2907 | ||
62bad3bf JG |
2908 | if (conn->session->pending_closure_trace_chunk) { |
2909 | /* | |
2910 | * Invalid; this means a second create_trace_chunk command was | |
2911 | * received before a close_trace_chunk. | |
2912 | */ | |
2913 | ERR("Invalid trace chunk close command received; a trace chunk is already waiting for a trace chunk close command"); | |
2914 | reply_code = LTTNG_ERR_INVALID_PROTOCOL; | |
2915 | ret = -1; | |
8cd15f6a | 2916 | goto end; |
62bad3bf JG |
2917 | } |
2918 | conn->session->pending_closure_trace_chunk = | |
2919 | conn->session->current_trace_chunk; | |
e5add6d0 | 2920 | conn->session->current_trace_chunk = published_chunk; |
e5add6d0 | 2921 | published_chunk = NULL; |
a7ceb342 MD |
2922 | if (!conn->session->pending_closure_trace_chunk) { |
2923 | session->ongoing_rotation = false; | |
2924 | } | |
e5add6d0 | 2925 | end: |
8cd15f6a | 2926 | pthread_mutex_unlock(&conn->session->lock); |
e5add6d0 JG |
2927 | reply.ret_code = htobe32((uint32_t) reply_code); |
2928 | send_ret = conn->sock->ops->sendmsg(conn->sock, | |
2929 | &reply, | |
2930 | sizeof(struct lttcomm_relayd_generic_reply), | |
2931 | 0); | |
2932 | if (send_ret < (ssize_t) sizeof(reply)) { | |
2933 | ERR("Failed to send \"create trace chunk\" command reply (ret = %zd)", | |
2934 | send_ret); | |
2935 | ret = -1; | |
2936 | } | |
2937 | end_no_reply: | |
2938 | lttng_trace_chunk_put(chunk); | |
2939 | lttng_trace_chunk_put(published_chunk); | |
e5add6d0 JG |
2940 | return ret; |
2941 | } | |
2942 | ||
bbc4768c JG |
2943 | /* |
2944 | * relay_close_trace_chunk: close a trace chunk | |
2945 | */ | |
2946 | static int relay_close_trace_chunk(const struct lttcomm_relayd_hdr *recv_hdr, | |
2947 | struct relay_connection *conn, | |
2948 | const struct lttng_buffer_view *payload) | |
2949 | { | |
9898f786 | 2950 | int ret = 0, buf_ret; |
bbc4768c JG |
2951 | ssize_t send_ret; |
2952 | struct relay_session *session = conn->session; | |
2953 | struct lttcomm_relayd_close_trace_chunk *msg; | |
ecd1a12f | 2954 | struct lttcomm_relayd_close_trace_chunk_reply reply = {}; |
bbc4768c JG |
2955 | struct lttng_buffer_view header_view; |
2956 | struct lttng_trace_chunk *chunk = NULL; | |
2957 | enum lttng_error_code reply_code = LTTNG_OK; | |
2958 | enum lttng_trace_chunk_status chunk_status; | |
2959 | uint64_t chunk_id; | |
c35f9726 | 2960 | LTTNG_OPTIONAL(enum lttng_trace_chunk_command_type) close_command = {}; |
bbc4768c | 2961 | time_t close_timestamp; |
ecd1a12f MD |
2962 | char closed_trace_chunk_path[LTTNG_PATH_MAX]; |
2963 | size_t path_length = 0; | |
2964 | const char *chunk_name = NULL; | |
2965 | struct lttng_dynamic_buffer reply_payload; | |
a7ceb342 | 2966 | const char *new_path; |
ecd1a12f MD |
2967 | |
2968 | lttng_dynamic_buffer_init(&reply_payload); | |
bbc4768c JG |
2969 | |
2970 | if (!session || !conn->version_check_done) { | |
2971 | ERR("Trying to close a trace chunk before version check"); | |
2972 | ret = -1; | |
2973 | goto end_no_reply; | |
2974 | } | |
2975 | ||
2976 | if (session->major == 2 && session->minor < 11) { | |
2977 | ERR("Chunk close command is unsupported before 2.11"); | |
2978 | ret = -1; | |
2979 | goto end_no_reply; | |
2980 | } | |
2981 | ||
2982 | header_view = lttng_buffer_view_from_view(payload, 0, sizeof(*msg)); | |
3e6e0df2 | 2983 | if (!lttng_buffer_view_is_valid(&header_view)) { |
bbc4768c JG |
2984 | ERR("Failed to receive payload of chunk close command"); |
2985 | ret = -1; | |
2986 | goto end_no_reply; | |
2987 | } | |
2988 | ||
2989 | /* Convert to host endianness. */ | |
2990 | msg = (typeof(msg)) header_view.data; | |
2991 | chunk_id = be64toh(msg->chunk_id); | |
2992 | close_timestamp = (time_t) be64toh(msg->close_timestamp); | |
ac497a37 SM |
2993 | close_command.value = (lttng_trace_chunk_command_type) be32toh(msg->close_command.value); |
2994 | close_command.is_set = msg->close_command.is_set; | |
bbc4768c JG |
2995 | |
2996 | chunk = sessiond_trace_chunk_registry_get_chunk( | |
2997 | sessiond_trace_chunk_registry, | |
2998 | conn->session->sessiond_uuid, | |
c5c79321 JG |
2999 | conn->session->id_sessiond.is_set ? |
3000 | conn->session->id_sessiond.value : | |
3001 | conn->session->id, | |
bbc4768c JG |
3002 | chunk_id); |
3003 | if (!chunk) { | |
c70636a7 | 3004 | char uuid_str[LTTNG_UUID_STR_LEN]; |
bbc4768c JG |
3005 | |
3006 | lttng_uuid_to_str(conn->session->sessiond_uuid, uuid_str); | |
3007 | ERR("Failed to find chunk to close: sessiond_uuid = %s, session_id = %" PRIu64 ", chunk_id = %" PRIu64, | |
3008 | uuid_str, | |
3009 | conn->session->id, | |
3010 | msg->chunk_id); | |
3011 | ret = -1; | |
3012 | reply_code = LTTNG_ERR_NOMEM; | |
3013 | goto end; | |
3014 | } | |
3015 | ||
62bad3bf | 3016 | pthread_mutex_lock(&session->lock); |
f77a6ec2 MD |
3017 | if (close_command.is_set && |
3018 | close_command.value == LTTNG_TRACE_CHUNK_COMMAND_TYPE_DELETE) { | |
3019 | /* | |
3020 | * Clear command. It is a protocol error to ask for a | |
3021 | * clear on a relay which does not allow it. Querying | |
3022 | * the configuration allows figuring out whether | |
3023 | * clearing is allowed before doing the clear. | |
3024 | */ | |
3025 | if (!opt_allow_clear) { | |
3026 | ret = -1; | |
3027 | reply_code = LTTNG_ERR_INVALID_PROTOCOL; | |
3028 | goto end_unlock_session; | |
3029 | } | |
3030 | } | |
62bad3bf JG |
3031 | if (session->pending_closure_trace_chunk && |
3032 | session->pending_closure_trace_chunk != chunk) { | |
3033 | ERR("Trace chunk close command for session \"%s\" does not target the trace chunk pending closure", | |
3034 | session->session_name); | |
3035 | reply_code = LTTNG_ERR_INVALID_PROTOCOL; | |
3036 | ret = -1; | |
3037 | goto end_unlock_session; | |
3038 | } | |
3039 | ||
a7ceb342 MD |
3040 | if (session->current_trace_chunk && session->current_trace_chunk != chunk && |
3041 | !lttng_trace_chunk_get_name_overridden(session->current_trace_chunk)) { | |
3042 | if (close_command.is_set && | |
3043 | close_command.value == LTTNG_TRACE_CHUNK_COMMAND_TYPE_DELETE && | |
3044 | !session->has_rotated) { | |
3045 | /* New chunk stays in session output directory. */ | |
3046 | new_path = ""; | |
3047 | } else { | |
3048 | /* Use chunk name for new chunk. */ | |
3049 | new_path = NULL; | |
3050 | } | |
3051 | /* Rename new chunk path. */ | |
3052 | chunk_status = lttng_trace_chunk_rename_path(session->current_trace_chunk, | |
3053 | new_path); | |
3054 | if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) { | |
3055 | ret = -1; | |
88188199 | 3056 | goto end_unlock_session; |
a7ceb342 MD |
3057 | } |
3058 | session->ongoing_rotation = false; | |
3059 | } | |
3060 | if ((!close_command.is_set || | |
3061 | close_command.value == LTTNG_TRACE_CHUNK_COMMAND_TYPE_NO_OPERATION) && | |
3062 | !lttng_trace_chunk_get_name_overridden(chunk)) { | |
3063 | const char *old_path; | |
3064 | ||
3065 | if (!session->has_rotated) { | |
3066 | old_path = ""; | |
3067 | } else { | |
3068 | old_path = NULL; | |
3069 | } | |
3070 | /* We need to move back the .tmp_old_chunk to its rightful place. */ | |
3071 | chunk_status = lttng_trace_chunk_rename_path(chunk, old_path); | |
3072 | if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) { | |
3073 | ret = -1; | |
88188199 | 3074 | goto end_unlock_session; |
a7ceb342 MD |
3075 | } |
3076 | } | |
bbc4768c JG |
3077 | chunk_status = lttng_trace_chunk_set_close_timestamp( |
3078 | chunk, close_timestamp); | |
3079 | if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) { | |
3080 | ERR("Failed to set trace chunk close timestamp"); | |
3081 | ret = -1; | |
3082 | reply_code = LTTNG_ERR_UNK; | |
62bad3bf | 3083 | goto end_unlock_session; |
bbc4768c JG |
3084 | } |
3085 | ||
3086 | if (close_command.is_set) { | |
3087 | chunk_status = lttng_trace_chunk_set_close_command( | |
3088 | chunk, close_command.value); | |
3089 | if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) { | |
3090 | ret = -1; | |
3091 | reply_code = LTTNG_ERR_INVALID; | |
62bad3bf | 3092 | goto end_unlock_session; |
bbc4768c JG |
3093 | } |
3094 | } | |
ecd1a12f MD |
3095 | chunk_status = lttng_trace_chunk_get_name(chunk, &chunk_name, NULL); |
3096 | if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) { | |
3097 | ERR("Failed to get chunk name"); | |
3098 | ret = -1; | |
3099 | reply_code = LTTNG_ERR_UNK; | |
3100 | goto end_unlock_session; | |
3101 | } | |
3102 | if (!session->has_rotated && !session->snapshot) { | |
3103 | ret = lttng_strncpy(closed_trace_chunk_path, | |
3104 | session->output_path, | |
3105 | sizeof(closed_trace_chunk_path)); | |
3106 | if (ret) { | |
3107 | ERR("Failed to send trace chunk path: path length of %zu bytes exceeds the maximal allowed length of %zu bytes", | |
3108 | strlen(session->output_path), | |
3109 | sizeof(closed_trace_chunk_path)); | |
3110 | reply_code = LTTNG_ERR_NOMEM; | |
3111 | ret = -1; | |
3112 | goto end_unlock_session; | |
3113 | } | |
3114 | } else { | |
3115 | if (session->snapshot) { | |
3116 | ret = snprintf(closed_trace_chunk_path, | |
3117 | sizeof(closed_trace_chunk_path), | |
3118 | "%s/%s", session->output_path, | |
3119 | chunk_name); | |
3120 | } else { | |
3121 | ret = snprintf(closed_trace_chunk_path, | |
3122 | sizeof(closed_trace_chunk_path), | |
3123 | "%s/" DEFAULT_ARCHIVED_TRACE_CHUNKS_DIRECTORY | |
3124 | "/%s", | |
3125 | session->output_path, chunk_name); | |
3126 | } | |
3127 | if (ret < 0 || ret == sizeof(closed_trace_chunk_path)) { | |
3128 | ERR("Failed to format closed trace chunk resulting path"); | |
3129 | reply_code = ret < 0 ? LTTNG_ERR_UNK : LTTNG_ERR_NOMEM; | |
3130 | ret = -1; | |
3131 | goto end_unlock_session; | |
3132 | } | |
3133 | } | |
489ea154 MD |
3134 | if (close_command.is_set && |
3135 | close_command.value == LTTNG_TRACE_CHUNK_COMMAND_TYPE_MOVE_TO_COMPLETED) { | |
3136 | session->has_rotated = true; | |
3137 | } | |
ecd1a12f MD |
3138 | DBG("Reply chunk path on close: %s", closed_trace_chunk_path); |
3139 | path_length = strlen(closed_trace_chunk_path) + 1; | |
3140 | if (path_length > UINT32_MAX) { | |
3141 | ERR("Closed trace chunk path exceeds the maximal length allowed by the protocol"); | |
3142 | ret = -1; | |
3143 | reply_code = LTTNG_ERR_INVALID_PROTOCOL; | |
3144 | goto end_unlock_session; | |
3145 | } | |
bbc4768c | 3146 | |
c35f9726 JG |
3147 | if (session->current_trace_chunk == chunk) { |
3148 | /* | |
3149 | * After a trace chunk close command, no new streams | |
3150 | * referencing the chunk may be created. Hence, on the | |
3151 | * event that no new trace chunk have been created for | |
3152 | * the session, the reference to the current trace chunk | |
3153 | * is released in order to allow it to be reclaimed when | |
3154 | * the last stream releases its reference to it. | |
3155 | */ | |
3156 | lttng_trace_chunk_put(session->current_trace_chunk); | |
3157 | session->current_trace_chunk = NULL; | |
3158 | } | |
62bad3bf JG |
3159 | lttng_trace_chunk_put(session->pending_closure_trace_chunk); |
3160 | session->pending_closure_trace_chunk = NULL; | |
3161 | end_unlock_session: | |
c35f9726 JG |
3162 | pthread_mutex_unlock(&session->lock); |
3163 | ||
bbc4768c | 3164 | end: |
ecd1a12f MD |
3165 | reply.generic.ret_code = htobe32((uint32_t) reply_code); |
3166 | reply.path_length = htobe32((uint32_t) path_length); | |
9898f786 | 3167 | buf_ret = lttng_dynamic_buffer_append( |
ecd1a12f | 3168 | &reply_payload, &reply, sizeof(reply)); |
9898f786 | 3169 | if (buf_ret) { |
ecd1a12f MD |
3170 | ERR("Failed to append \"close trace chunk\" command reply header to payload buffer"); |
3171 | goto end_no_reply; | |
3172 | } | |
3173 | ||
3174 | if (reply_code == LTTNG_OK) { | |
9898f786 | 3175 | buf_ret = lttng_dynamic_buffer_append(&reply_payload, |
ecd1a12f | 3176 | closed_trace_chunk_path, path_length); |
9898f786 | 3177 | if (buf_ret) { |
ecd1a12f MD |
3178 | ERR("Failed to append \"close trace chunk\" command reply path to payload buffer"); |
3179 | goto end_no_reply; | |
3180 | } | |
3181 | } | |
3182 | ||
bbc4768c | 3183 | send_ret = conn->sock->ops->sendmsg(conn->sock, |
ecd1a12f MD |
3184 | reply_payload.data, |
3185 | reply_payload.size, | |
bbc4768c | 3186 | 0); |
ecd1a12f MD |
3187 | if (send_ret < reply_payload.size) { |
3188 | ERR("Failed to send \"close trace chunk\" command reply of %zu bytes (ret = %zd)", | |
3189 | reply_payload.size, send_ret); | |
bbc4768c | 3190 | ret = -1; |
ecd1a12f | 3191 | goto end_no_reply; |
bbc4768c JG |
3192 | } |
3193 | end_no_reply: | |
3194 | lttng_trace_chunk_put(chunk); | |
ecd1a12f | 3195 | lttng_dynamic_buffer_reset(&reply_payload); |
bbc4768c JG |
3196 | return ret; |
3197 | } | |
3198 | ||
c35f9726 JG |
3199 | /* |
3200 | * relay_trace_chunk_exists: check if a trace chunk exists | |
3201 | */ | |
3202 | static int relay_trace_chunk_exists(const struct lttcomm_relayd_hdr *recv_hdr, | |
3203 | struct relay_connection *conn, | |
3204 | const struct lttng_buffer_view *payload) | |
3205 | { | |
3206 | int ret = 0; | |
3207 | ssize_t send_ret; | |
3208 | struct relay_session *session = conn->session; | |
3209 | struct lttcomm_relayd_trace_chunk_exists *msg; | |
3210 | struct lttcomm_relayd_trace_chunk_exists_reply reply = {}; | |
3211 | struct lttng_buffer_view header_view; | |
c35f9726 | 3212 | uint64_t chunk_id; |
6b584c2e | 3213 | bool chunk_exists; |
c35f9726 JG |
3214 | |
3215 | if (!session || !conn->version_check_done) { | |
0f1b1d25 | 3216 | ERR("Trying to check for the presence of a trace chunk before version check"); |
c35f9726 JG |
3217 | ret = -1; |
3218 | goto end_no_reply; | |
3219 | } | |
3220 | ||
3221 | if (session->major == 2 && session->minor < 11) { | |
8a82be4c | 3222 | ERR("Chunk exists command is unsupported before 2.11"); |
c35f9726 JG |
3223 | ret = -1; |
3224 | goto end_no_reply; | |
3225 | } | |
3226 | ||
3227 | header_view = lttng_buffer_view_from_view(payload, 0, sizeof(*msg)); | |
3e6e0df2 | 3228 | if (!lttng_buffer_view_is_valid(&header_view)) { |
8a82be4c | 3229 | ERR("Failed to receive payload of chunk exists command"); |
c35f9726 JG |
3230 | ret = -1; |
3231 | goto end_no_reply; | |
3232 | } | |
3233 | ||
3234 | /* Convert to host endianness. */ | |
3235 | msg = (typeof(msg)) header_view.data; | |
3236 | chunk_id = be64toh(msg->chunk_id); | |
3237 | ||
6b584c2e | 3238 | ret = sessiond_trace_chunk_registry_chunk_exists( |
c35f9726 JG |
3239 | sessiond_trace_chunk_registry, |
3240 | conn->session->sessiond_uuid, | |
3241 | conn->session->id, | |
6b584c2e JG |
3242 | chunk_id, &chunk_exists); |
3243 | /* | |
3244 | * If ret is not 0, send the reply and report the error to the caller. | |
3245 | * It is a protocol (or internal) error and the session/connection | |
3246 | * should be torn down. | |
3247 | */ | |
ac497a37 SM |
3248 | reply.generic.ret_code = htobe32((uint32_t) (ret == 0 ? LTTNG_OK : LTTNG_ERR_INVALID_PROTOCOL)); |
3249 | reply.trace_chunk_exists = ret == 0 ? chunk_exists : 0; | |
3250 | ||
6b584c2e JG |
3251 | send_ret = conn->sock->ops->sendmsg( |
3252 | conn->sock, &reply, sizeof(reply), 0); | |
c35f9726 JG |
3253 | if (send_ret < (ssize_t) sizeof(reply)) { |
3254 | ERR("Failed to send \"create trace chunk\" command reply (ret = %zd)", | |
3255 | send_ret); | |
3256 | ret = -1; | |
3257 | } | |
3258 | end_no_reply: | |
c35f9726 JG |
3259 | return ret; |
3260 | } | |
3261 | ||
8614e600 MD |
3262 | /* |
3263 | * relay_get_configuration: query whether feature is available | |
3264 | */ | |
3265 | static int relay_get_configuration(const struct lttcomm_relayd_hdr *recv_hdr, | |
3266 | struct relay_connection *conn, | |
3267 | const struct lttng_buffer_view *payload) | |
3268 | { | |
3269 | int ret = 0; | |
3270 | ssize_t send_ret; | |
3271 | struct lttcomm_relayd_get_configuration *msg; | |
3272 | struct lttcomm_relayd_get_configuration_reply reply = {}; | |
3273 | struct lttng_buffer_view header_view; | |
3274 | uint64_t query_flags = 0; | |
3275 | uint64_t result_flags = 0; | |
3276 | ||
3277 | header_view = lttng_buffer_view_from_view(payload, 0, sizeof(*msg)); | |
3e6e0df2 | 3278 | if (!lttng_buffer_view_is_valid(&header_view)) { |
8614e600 MD |
3279 | ERR("Failed to receive payload of chunk close command"); |
3280 | ret = -1; | |
3281 | goto end_no_reply; | |
3282 | } | |
3283 | ||
3284 | /* Convert to host endianness. */ | |
3285 | msg = (typeof(msg)) header_view.data; | |
3286 | query_flags = be64toh(msg->query_flags); | |
3287 | ||
3288 | if (query_flags) { | |
3289 | ret = LTTNG_ERR_INVALID_PROTOCOL; | |
3290 | goto reply; | |
3291 | } | |
3292 | if (opt_allow_clear) { | |
3293 | result_flags |= LTTCOMM_RELAYD_CONFIGURATION_FLAG_CLEAR_ALLOWED; | |
3294 | } | |
3295 | ret = 0; | |
3296 | reply: | |
ac497a37 SM |
3297 | reply.generic.ret_code = htobe32((uint32_t) (ret == 0 ? LTTNG_OK : LTTNG_ERR_INVALID_PROTOCOL)); |
3298 | reply.relayd_configuration_flags = htobe64(result_flags); | |
3299 | ||
8614e600 MD |
3300 | send_ret = conn->sock->ops->sendmsg( |
3301 | conn->sock, &reply, sizeof(reply), 0); | |
3302 | if (send_ret < (ssize_t) sizeof(reply)) { | |
3303 | ERR("Failed to send \"get configuration\" command reply (ret = %zd)", | |
3304 | send_ret); | |
3305 | ret = -1; | |
3306 | } | |
3307 | end_no_reply: | |
3308 | return ret; | |
3309 | } | |
3310 | ||
5312a3ed JG |
3311 | static int relay_process_control_command(struct relay_connection *conn, |
3312 | const struct lttcomm_relayd_hdr *header, | |
3313 | const struct lttng_buffer_view *payload) | |
b8aa1682 JD |
3314 | { |
3315 | int ret = 0; | |
3316 | ||
00e71031 FD |
3317 | DBG3("Processing \"%s\" command for socket %i", |
3318 | lttcomm_relayd_command_str((lttcomm_relayd_command) header->cmd), | |
3319 | conn->sock->fd); | |
5312a3ed | 3320 | switch (header->cmd) { |
b8aa1682 | 3321 | case RELAYD_CREATE_SESSION: |
5312a3ed | 3322 | ret = relay_create_session(header, conn, payload); |
b8aa1682 | 3323 | break; |
b8aa1682 | 3324 | case RELAYD_ADD_STREAM: |
5312a3ed | 3325 | ret = relay_add_stream(header, conn, payload); |
b8aa1682 JD |
3326 | break; |
3327 | case RELAYD_START_DATA: | |
5312a3ed | 3328 | ret = relay_start(header, conn, payload); |
b8aa1682 JD |
3329 | break; |
3330 | case RELAYD_SEND_METADATA: | |
5312a3ed | 3331 | ret = relay_recv_metadata(header, conn, payload); |
b8aa1682 JD |
3332 | break; |
3333 | case RELAYD_VERSION: | |
5312a3ed | 3334 | ret = relay_send_version(header, conn, payload); |
b8aa1682 | 3335 | break; |
173af62f | 3336 | case RELAYD_CLOSE_STREAM: |
5312a3ed | 3337 | ret = relay_close_stream(header, conn, payload); |
173af62f | 3338 | break; |
6d805429 | 3339 | case RELAYD_DATA_PENDING: |
5312a3ed | 3340 | ret = relay_data_pending(header, conn, payload); |
c8f59ee5 DG |
3341 | break; |
3342 | case RELAYD_QUIESCENT_CONTROL: | |
5312a3ed | 3343 | ret = relay_quiescent_control(header, conn, payload); |
c8f59ee5 | 3344 | break; |
f7079f67 | 3345 | case RELAYD_BEGIN_DATA_PENDING: |
5312a3ed | 3346 | ret = relay_begin_data_pending(header, conn, payload); |
f7079f67 DG |
3347 | break; |
3348 | case RELAYD_END_DATA_PENDING: | |
5312a3ed | 3349 | ret = relay_end_data_pending(header, conn, payload); |
f7079f67 | 3350 | break; |
1c20f0e2 | 3351 | case RELAYD_SEND_INDEX: |
5312a3ed | 3352 | ret = relay_recv_index(header, conn, payload); |
1c20f0e2 | 3353 | break; |
a4baae1b | 3354 | case RELAYD_STREAMS_SENT: |
5312a3ed | 3355 | ret = relay_streams_sent(header, conn, payload); |
a4baae1b | 3356 | break; |
93ec662e | 3357 | case RELAYD_RESET_METADATA: |
5312a3ed | 3358 | ret = relay_reset_metadata(header, conn, payload); |
93ec662e | 3359 | break; |
c35f9726 | 3360 | case RELAYD_ROTATE_STREAMS: |
c35f9726 | 3361 | ret = relay_rotate_session_streams(header, conn, payload); |
d3ecc550 | 3362 | break; |
e5add6d0 | 3363 | case RELAYD_CREATE_TRACE_CHUNK: |
e5add6d0 JG |
3364 | ret = relay_create_trace_chunk(header, conn, payload); |
3365 | break; | |
bbc4768c | 3366 | case RELAYD_CLOSE_TRACE_CHUNK: |
bbc4768c JG |
3367 | ret = relay_close_trace_chunk(header, conn, payload); |
3368 | break; | |
c35f9726 | 3369 | case RELAYD_TRACE_CHUNK_EXISTS: |
c35f9726 JG |
3370 | ret = relay_trace_chunk_exists(header, conn, payload); |
3371 | break; | |
8614e600 | 3372 | case RELAYD_GET_CONFIGURATION: |
8614e600 MD |
3373 | ret = relay_get_configuration(header, conn, payload); |
3374 | break; | |
b8aa1682 JD |
3375 | case RELAYD_UPDATE_SYNC_INFO: |
3376 | default: | |
5312a3ed | 3377 | ERR("Received unknown command (%u)", header->cmd); |
58eb9381 | 3378 | relay_unknown_command(conn); |
b8aa1682 JD |
3379 | ret = -1; |
3380 | goto end; | |
3381 | } | |
3382 | ||
3383 | end: | |
3384 | return ret; | |
3385 | } | |
3386 | ||
5569b118 JG |
3387 | static enum relay_connection_status relay_process_control_receive_payload( |
3388 | struct relay_connection *conn) | |
5312a3ed JG |
3389 | { |
3390 | int ret = 0; | |
5569b118 | 3391 | enum relay_connection_status status = RELAY_CONNECTION_STATUS_OK; |
5312a3ed JG |
3392 | struct lttng_dynamic_buffer *reception_buffer = |
3393 | &conn->protocol.ctrl.reception_buffer; | |
3394 | struct ctrl_connection_state_receive_payload *state = | |
3395 | &conn->protocol.ctrl.state.receive_payload; | |
3396 | struct lttng_buffer_view payload_view; | |
3397 | ||
3398 | if (state->left_to_receive == 0) { | |
3399 | /* Short-circuit for payload-less commands. */ | |
3400 | goto reception_complete; | |
3401 | } | |
3402 | ||
3403 | ret = conn->sock->ops->recvmsg(conn->sock, | |
3404 | reception_buffer->data + state->received, | |
3405 | state->left_to_receive, MSG_DONTWAIT); | |
3406 | if (ret < 0) { | |
5569b118 JG |
3407 | if (errno != EAGAIN && errno != EWOULDBLOCK) { |
3408 | PERROR("Unable to receive command payload on sock %d", | |
3409 | conn->sock->fd); | |
3410 | status = RELAY_CONNECTION_STATUS_ERROR; | |
3411 | } | |
5312a3ed JG |
3412 | goto end; |
3413 | } else if (ret == 0) { | |
3414 | DBG("Socket %d performed an orderly shutdown (received EOF)", conn->sock->fd); | |
5569b118 | 3415 | status = RELAY_CONNECTION_STATUS_CLOSED; |
5312a3ed JG |
3416 | goto end; |
3417 | } | |
3418 | ||
a0377dfe FD |
3419 | LTTNG_ASSERT(ret > 0); |
3420 | LTTNG_ASSERT(ret <= state->left_to_receive); | |
5312a3ed JG |
3421 | |
3422 | state->left_to_receive -= ret; | |
3423 | state->received += ret; | |
3424 | ||
3425 | if (state->left_to_receive > 0) { | |
3426 | /* | |
3427 | * Can't transition to the protocol's next state, wait to | |
3428 | * receive the rest of the header. | |
3429 | */ | |
3430 | DBG3("Partial reception of control connection protocol payload (received %" PRIu64 " bytes, %" PRIu64 " bytes left to receive, fd = %i)", | |
3431 | state->received, state->left_to_receive, | |
3432 | conn->sock->fd); | |
5312a3ed JG |
3433 | goto end; |
3434 | } | |
3435 | ||
3436 | reception_complete: | |
3437 | DBG("Done receiving control command payload: fd = %i, payload size = %" PRIu64 " bytes", | |
3438 | conn->sock->fd, state->received); | |
3439 | /* | |
3440 | * The payload required to process the command has been received. | |
3441 | * A view to the reception buffer is forwarded to the various | |
3442 | * commands and the state of the control is reset on success. | |
3443 | * | |
3444 | * Commands are responsible for sending their reply to the peer. | |
3445 | */ | |
3446 | payload_view = lttng_buffer_view_from_dynamic_buffer(reception_buffer, | |
3447 | 0, -1); | |
3448 | ret = relay_process_control_command(conn, | |
3449 | &state->header, &payload_view); | |
3450 | if (ret < 0) { | |
5569b118 | 3451 | status = RELAY_CONNECTION_STATUS_ERROR; |
5312a3ed JG |
3452 | goto end; |
3453 | } | |
3454 | ||
3455 | ret = connection_reset_protocol_state(conn); | |
5569b118 JG |
3456 | if (ret) { |
3457 | status = RELAY_CONNECTION_STATUS_ERROR; | |
3458 | } | |
5312a3ed | 3459 | end: |
5569b118 | 3460 | return status; |
5312a3ed JG |
3461 | } |
3462 | ||
5569b118 JG |
3463 | static enum relay_connection_status relay_process_control_receive_header( |
3464 | struct relay_connection *conn) | |
5312a3ed JG |
3465 | { |
3466 | int ret = 0; | |
5569b118 | 3467 | enum relay_connection_status status = RELAY_CONNECTION_STATUS_OK; |
5312a3ed JG |
3468 | struct lttcomm_relayd_hdr header; |
3469 | struct lttng_dynamic_buffer *reception_buffer = | |
3470 | &conn->protocol.ctrl.reception_buffer; | |
3471 | struct ctrl_connection_state_receive_header *state = | |
3472 | &conn->protocol.ctrl.state.receive_header; | |
3473 | ||
a0377dfe | 3474 | LTTNG_ASSERT(state->left_to_receive != 0); |
5312a3ed JG |
3475 | |
3476 | ret = conn->sock->ops->recvmsg(conn->sock, | |
3477 | reception_buffer->data + state->received, | |
3478 | state->left_to_receive, MSG_DONTWAIT); | |
3479 | if (ret < 0) { | |
5569b118 JG |
3480 | if (errno != EAGAIN && errno != EWOULDBLOCK) { |
3481 | PERROR("Unable to receive control command header on sock %d", | |
3482 | conn->sock->fd); | |
3483 | status = RELAY_CONNECTION_STATUS_ERROR; | |
3484 | } | |
5312a3ed JG |
3485 | goto end; |
3486 | } else if (ret == 0) { | |
3487 | DBG("Socket %d performed an orderly shutdown (received EOF)", conn->sock->fd); | |
5569b118 | 3488 | status = RELAY_CONNECTION_STATUS_CLOSED; |
5312a3ed JG |
3489 | goto end; |
3490 | } | |
3491 | ||
a0377dfe FD |
3492 | LTTNG_ASSERT(ret > 0); |
3493 | LTTNG_ASSERT(ret <= state->left_to_receive); | |
5312a3ed JG |
3494 | |
3495 | state->left_to_receive -= ret; | |
3496 | state->received += ret; | |
3497 | ||
3498 | if (state->left_to_receive > 0) { | |
3499 | /* | |
3500 | * Can't transition to the protocol's next state, wait to | |
3501 | * receive the rest of the header. | |
3502 | */ | |
3503 | DBG3("Partial reception of control connection protocol header (received %" PRIu64 " bytes, %" PRIu64 " bytes left to receive, fd = %i)", | |
3504 | state->received, state->left_to_receive, | |
3505 | conn->sock->fd); | |
5312a3ed JG |
3506 | goto end; |
3507 | } | |
3508 | ||
3509 | /* Transition to next state: receiving the command's payload. */ | |
3510 | conn->protocol.ctrl.state_id = | |
3511 | CTRL_CONNECTION_STATE_RECEIVE_PAYLOAD; | |
3512 | memcpy(&header, reception_buffer->data, sizeof(header)); | |
3513 | header.circuit_id = be64toh(header.circuit_id); | |
3514 | header.data_size = be64toh(header.data_size); | |
3515 | header.cmd = be32toh(header.cmd); | |
3516 | header.cmd_version = be32toh(header.cmd_version); | |
3517 | memcpy(&conn->protocol.ctrl.state.receive_payload.header, | |
3518 | &header, sizeof(header)); | |
3519 | ||
00e71031 FD |
3520 | DBG("Done receiving control command header: fd = %i, cmd = %s, cmd_version = %" PRIu32 ", payload size = %" PRIu64 " bytes", |
3521 | conn->sock->fd, lttcomm_relayd_command_str((enum lttcomm_relayd_command) header.cmd), | |
3522 | header.cmd_version, header.data_size); | |
5312a3ed | 3523 | |
715e6fb1 | 3524 | if (header.data_size > DEFAULT_NETWORK_RELAYD_CTRL_MAX_PAYLOAD_SIZE) { |
5312a3ed JG |
3525 | ERR("Command header indicates a payload (%" PRIu64 " bytes) that exceeds the maximal payload size allowed on a control connection.", |
3526 | header.data_size); | |
5569b118 | 3527 | status = RELAY_CONNECTION_STATUS_ERROR; |
5312a3ed JG |
3528 | goto end; |
3529 | } | |
3530 | ||
3531 | conn->protocol.ctrl.state.receive_payload.left_to_receive = | |
3532 | header.data_size; | |
3533 | conn->protocol.ctrl.state.receive_payload.received = 0; | |
3534 | ret = lttng_dynamic_buffer_set_size(reception_buffer, | |
3535 | header.data_size); | |
3536 | if (ret) { | |
5569b118 | 3537 | status = RELAY_CONNECTION_STATUS_ERROR; |
5312a3ed JG |
3538 | goto end; |
3539 | } | |
3540 | ||
3541 | if (header.data_size == 0) { | |
3542 | /* | |
3543 | * Manually invoke the next state as the poll loop | |
3544 | * will not wake-up to allow us to proceed further. | |
3545 | */ | |
5569b118 | 3546 | status = relay_process_control_receive_payload(conn); |
5312a3ed JG |
3547 | } |
3548 | end: | |
5569b118 | 3549 | return status; |
5312a3ed JG |
3550 | } |
3551 | ||
3552 | /* | |
3553 | * Process the commands received on the control socket | |
3554 | */ | |
5569b118 JG |
3555 | static enum relay_connection_status relay_process_control( |
3556 | struct relay_connection *conn) | |
5312a3ed | 3557 | { |
5569b118 | 3558 | enum relay_connection_status status; |
5312a3ed JG |
3559 | |
3560 | switch (conn->protocol.ctrl.state_id) { | |
3561 | case CTRL_CONNECTION_STATE_RECEIVE_HEADER: | |
5569b118 | 3562 | status = relay_process_control_receive_header(conn); |
5312a3ed JG |
3563 | break; |
3564 | case CTRL_CONNECTION_STATE_RECEIVE_PAYLOAD: | |
5569b118 | 3565 | status = relay_process_control_receive_payload(conn); |
5312a3ed JG |
3566 | break; |
3567 | default: | |
3568 | ERR("Unknown control connection protocol state encountered."); | |
3569 | abort(); | |
3570 | } | |
3571 | ||
5569b118 | 3572 | return status; |
5312a3ed JG |
3573 | } |
3574 | ||
5569b118 JG |
3575 | static enum relay_connection_status relay_process_data_receive_header( |
3576 | struct relay_connection *conn) | |
b8aa1682 | 3577 | { |
5312a3ed | 3578 | int ret; |
5569b118 | 3579 | enum relay_connection_status status = RELAY_CONNECTION_STATUS_OK; |
5312a3ed JG |
3580 | struct data_connection_state_receive_header *state = |
3581 | &conn->protocol.data.state.receive_header; | |
3582 | struct lttcomm_relayd_data_hdr header; | |
b8aa1682 | 3583 | struct relay_stream *stream; |
5312a3ed | 3584 | |
a0377dfe | 3585 | LTTNG_ASSERT(state->left_to_receive != 0); |
5312a3ed JG |
3586 | |
3587 | ret = conn->sock->ops->recvmsg(conn->sock, | |
3588 | state->header_reception_buffer + state->received, | |
3589 | state->left_to_receive, MSG_DONTWAIT); | |
3590 | if (ret < 0) { | |
5569b118 JG |
3591 | if (errno != EAGAIN && errno != EWOULDBLOCK) { |
3592 | PERROR("Unable to receive data header on sock %d", conn->sock->fd); | |
3593 | status = RELAY_CONNECTION_STATUS_ERROR; | |
3594 | } | |
5312a3ed JG |
3595 | goto end; |
3596 | } else if (ret == 0) { | |
3597 | /* Orderly shutdown. Not necessary to print an error. */ | |
3598 | DBG("Socket %d performed an orderly shutdown (received EOF)", conn->sock->fd); | |
5569b118 | 3599 | status = RELAY_CONNECTION_STATUS_CLOSED; |
b8aa1682 JD |
3600 | goto end; |
3601 | } | |
3602 | ||
a0377dfe FD |
3603 | LTTNG_ASSERT(ret > 0); |
3604 | LTTNG_ASSERT(ret <= state->left_to_receive); | |
5312a3ed JG |
3605 | |
3606 | state->left_to_receive -= ret; | |
3607 | state->received += ret; | |
3608 | ||
3609 | if (state->left_to_receive > 0) { | |
3610 | /* | |
3611 | * Can't transition to the protocol's next state, wait to | |
3612 | * receive the rest of the header. | |
3613 | */ | |
3614 | DBG3("Partial reception of data connection header (received %" PRIu64 " bytes, %" PRIu64 " bytes left to receive, fd = %i)", | |
3615 | state->received, state->left_to_receive, | |
3616 | conn->sock->fd); | |
7591bab1 | 3617 | goto end; |
b8aa1682 | 3618 | } |
b8aa1682 | 3619 | |
5312a3ed JG |
3620 | /* Transition to next state: receiving the payload. */ |
3621 | conn->protocol.data.state_id = DATA_CONNECTION_STATE_RECEIVE_PAYLOAD; | |
173af62f | 3622 | |
5312a3ed JG |
3623 | memcpy(&header, state->header_reception_buffer, sizeof(header)); |
3624 | header.circuit_id = be64toh(header.circuit_id); | |
3625 | header.stream_id = be64toh(header.stream_id); | |
3626 | header.data_size = be32toh(header.data_size); | |
3627 | header.net_seq_num = be64toh(header.net_seq_num); | |
3628 | header.padding_size = be32toh(header.padding_size); | |
3629 | memcpy(&conn->protocol.data.state.receive_payload.header, &header, sizeof(header)); | |
3630 | ||
3631 | conn->protocol.data.state.receive_payload.left_to_receive = | |
3632 | header.data_size; | |
3633 | conn->protocol.data.state.receive_payload.received = 0; | |
3634 | conn->protocol.data.state.receive_payload.rotate_index = false; | |
3635 | ||
3636 | DBG("Received data connection header on fd %i: circuit_id = %" PRIu64 ", stream_id = %" PRIu64 ", data_size = %" PRIu32 ", net_seq_num = %" PRIu64 ", padding_size = %" PRIu32, | |
3637 | conn->sock->fd, header.circuit_id, | |
3638 | header.stream_id, header.data_size, | |
3639 | header.net_seq_num, header.padding_size); | |
3640 | ||
3641 | stream = stream_get_by_id(header.stream_id); | |
3642 | if (!stream) { | |
3643 | DBG("relay_process_data_receive_payload: Cannot find stream %" PRIu64, | |
3644 | header.stream_id); | |
5569b118 JG |
3645 | /* Protocol error. */ |
3646 | status = RELAY_CONNECTION_STATUS_ERROR; | |
5312a3ed JG |
3647 | goto end; |
3648 | } | |
b8aa1682 | 3649 | |
7591bab1 | 3650 | pthread_mutex_lock(&stream->lock); |
c35f9726 JG |
3651 | /* Prepare stream for the reception of a new packet. */ |
3652 | ret = stream_init_packet(stream, header.data_size, | |
3653 | &conn->protocol.data.state.receive_payload.rotate_index); | |
3654 | pthread_mutex_unlock(&stream->lock); | |
3655 | if (ret) { | |
3656 | ERR("Failed to rotate stream output file"); | |
3657 | status = RELAY_CONNECTION_STATUS_ERROR; | |
3658 | goto end_stream_unlock; | |
1c20f0e2 JD |
3659 | } |
3660 | ||
5312a3ed | 3661 | end_stream_unlock: |
5312a3ed JG |
3662 | stream_put(stream); |
3663 | end: | |
5569b118 | 3664 | return status; |
5312a3ed JG |
3665 | } |
3666 | ||
5569b118 JG |
3667 | static enum relay_connection_status relay_process_data_receive_payload( |
3668 | struct relay_connection *conn) | |
5312a3ed JG |
3669 | { |
3670 | int ret; | |
5569b118 | 3671 | enum relay_connection_status status = RELAY_CONNECTION_STATUS_OK; |
5312a3ed JG |
3672 | struct relay_stream *stream; |
3673 | struct data_connection_state_receive_payload *state = | |
3674 | &conn->protocol.data.state.receive_payload; | |
3675 | const size_t chunk_size = RECV_DATA_BUFFER_SIZE; | |
3676 | char data_buffer[chunk_size]; | |
3677 | bool partial_recv = false; | |
3678 | bool new_stream = false, close_requested = false, index_flushed = false; | |
3679 | uint64_t left_to_receive = state->left_to_receive; | |
3680 | struct relay_session *session; | |
3681 | ||
fd0f1e3e JR |
3682 | DBG3("Receiving data for stream id %" PRIu64 " seqnum %" PRIu64 ", %" PRIu64" bytes received, %" PRIu64 " bytes left to receive", |
3683 | state->header.stream_id, state->header.net_seq_num, | |
3684 | state->received, left_to_receive); | |
3685 | ||
5312a3ed JG |
3686 | stream = stream_get_by_id(state->header.stream_id); |
3687 | if (!stream) { | |
5569b118 | 3688 | /* Protocol error. */ |
fd0f1e3e | 3689 | ERR("relay_process_data_receive_payload: cannot find stream %" PRIu64, |
5312a3ed | 3690 | state->header.stream_id); |
5569b118 | 3691 | status = RELAY_CONNECTION_STATUS_ERROR; |
5312a3ed | 3692 | goto end; |
1c20f0e2 JD |
3693 | } |
3694 | ||
5312a3ed JG |
3695 | pthread_mutex_lock(&stream->lock); |
3696 | session = stream->trace->session; | |
fd0f1e3e JR |
3697 | if (!conn->session) { |
3698 | ret = connection_set_session(conn, session); | |
3699 | if (ret) { | |
3700 | status = RELAY_CONNECTION_STATUS_ERROR; | |
3701 | goto end_stream_unlock; | |
3702 | } | |
3703 | } | |
5312a3ed JG |
3704 | |
3705 | /* | |
3706 | * The size of the "chunk" received on any iteration is bounded by: | |
3707 | * - the data left to receive, | |
3708 | * - the data immediately available on the socket, | |
3709 | * - the on-stack data buffer | |
3710 | */ | |
3711 | while (left_to_receive > 0 && !partial_recv) { | |
ff2aa8f0 | 3712 | size_t recv_size = std::min<uint64_t>(left_to_receive, chunk_size); |
c35f9726 | 3713 | struct lttng_buffer_view packet_chunk; |
5312a3ed JG |
3714 | |
3715 | ret = conn->sock->ops->recvmsg(conn->sock, data_buffer, | |
3716 | recv_size, MSG_DONTWAIT); | |
3717 | if (ret < 0) { | |
5569b118 JG |
3718 | if (errno != EAGAIN && errno != EWOULDBLOCK) { |
3719 | PERROR("Socket %d error", conn->sock->fd); | |
3720 | status = RELAY_CONNECTION_STATUS_ERROR; | |
3721 | } | |
0848dba7 | 3722 | goto end_stream_unlock; |
5312a3ed JG |
3723 | } else if (ret == 0) { |
3724 | /* No more data ready to be consumed on socket. */ | |
3725 | DBG3("No more data ready for consumption on data socket of stream id %" PRIu64, | |
3726 | state->header.stream_id); | |
5569b118 | 3727 | status = RELAY_CONNECTION_STATUS_CLOSED; |
5312a3ed JG |
3728 | break; |
3729 | } else if (ret < (int) recv_size) { | |
3730 | /* | |
3731 | * All the data available on the socket has been | |
3732 | * consumed. | |
3733 | */ | |
3734 | partial_recv = true; | |
c35f9726 | 3735 | recv_size = ret; |
0848dba7 MD |
3736 | } |
3737 | ||
c35f9726 JG |
3738 | packet_chunk = lttng_buffer_view_init(data_buffer, |
3739 | 0, recv_size); | |
a0377dfe | 3740 | LTTNG_ASSERT(packet_chunk.data); |
5312a3ed | 3741 | |
c35f9726 JG |
3742 | ret = stream_write(stream, &packet_chunk, 0); |
3743 | if (ret) { | |
0848dba7 | 3744 | ERR("Relay error writing data to file"); |
5569b118 | 3745 | status = RELAY_CONNECTION_STATUS_ERROR; |
0848dba7 MD |
3746 | goto end_stream_unlock; |
3747 | } | |
3748 | ||
5312a3ed JG |
3749 | left_to_receive -= recv_size; |
3750 | state->received += recv_size; | |
3751 | state->left_to_receive = left_to_receive; | |
5312a3ed JG |
3752 | } |
3753 | ||
3754 | if (state->left_to_receive > 0) { | |
3755 | /* | |
3756 | * Did not receive all the data expected, wait for more data to | |
3757 | * become available on the socket. | |
3758 | */ | |
3759 | DBG3("Partial receive on data connection of stream id %" PRIu64 ", %" PRIu64 " bytes received, %" PRIu64 " bytes left to receive", | |
3760 | state->header.stream_id, state->received, | |
3761 | state->left_to_receive); | |
5312a3ed | 3762 | goto end_stream_unlock; |
0848dba7 | 3763 | } |
5ab7344e | 3764 | |
c35f9726 JG |
3765 | ret = stream_write(stream, NULL, state->header.padding_size); |
3766 | if (ret) { | |
5569b118 | 3767 | status = RELAY_CONNECTION_STATUS_ERROR; |
7591bab1 | 3768 | goto end_stream_unlock; |
1d4dfdef | 3769 | } |
5312a3ed | 3770 | |
298a25ca | 3771 | if (session_streams_have_index(session)) { |
c35f9726 JG |
3772 | ret = stream_update_index(stream, state->header.net_seq_num, |
3773 | state->rotate_index, &index_flushed, | |
3774 | state->header.data_size + state->header.padding_size); | |
5312a3ed | 3775 | if (ret < 0) { |
c35f9726 | 3776 | ERR("Failed to update index: stream %" PRIu64 " net_seq_num %" PRIu64 " ret %d", |
5312a3ed JG |
3777 | stream->stream_handle, |
3778 | state->header.net_seq_num, ret); | |
5569b118 | 3779 | status = RELAY_CONNECTION_STATUS_ERROR; |
5312a3ed JG |
3780 | goto end_stream_unlock; |
3781 | } | |
3782 | } | |
3783 | ||
a8f9f353 | 3784 | if (stream->prev_data_seq == -1ULL) { |
c0bae11d MD |
3785 | new_stream = true; |
3786 | } | |
3787 | ||
c35f9726 JG |
3788 | ret = stream_complete_packet(stream, state->header.data_size + |
3789 | state->header.padding_size, state->header.net_seq_num, | |
3790 | index_flushed); | |
3791 | if (ret) { | |
3792 | status = RELAY_CONNECTION_STATUS_ERROR; | |
3793 | goto end_stream_unlock; | |
3794 | } | |
5312a3ed JG |
3795 | |
3796 | /* | |
3797 | * Resetting the protocol state (to RECEIVE_HEADER) will trash the | |
3798 | * contents of *state which are aliased (union) to the same location as | |
3799 | * the new state. Don't use it beyond this point. | |
3800 | */ | |
3801 | connection_reset_protocol_state(conn); | |
3802 | state = NULL; | |
173af62f | 3803 | |
7591bab1 | 3804 | end_stream_unlock: |
bda7c7b9 | 3805 | close_requested = stream->close_requested; |
7591bab1 | 3806 | pthread_mutex_unlock(&stream->lock); |
5312a3ed | 3807 | if (close_requested && left_to_receive == 0) { |
bda7c7b9 JG |
3808 | try_stream_close(stream); |
3809 | } | |
3810 | ||
c0bae11d MD |
3811 | if (new_stream) { |
3812 | pthread_mutex_lock(&session->lock); | |
3813 | uatomic_set(&session->new_streams, 1); | |
3814 | pthread_mutex_unlock(&session->lock); | |
3815 | } | |
5312a3ed | 3816 | |
7591bab1 | 3817 | stream_put(stream); |
b8aa1682 | 3818 | end: |
5569b118 | 3819 | return status; |
b8aa1682 JD |
3820 | } |
3821 | ||
5312a3ed JG |
3822 | /* |
3823 | * relay_process_data: Process the data received on the data socket | |
3824 | */ | |
5569b118 JG |
3825 | static enum relay_connection_status relay_process_data( |
3826 | struct relay_connection *conn) | |
5312a3ed | 3827 | { |
5569b118 | 3828 | enum relay_connection_status status; |
5312a3ed JG |
3829 | |
3830 | switch (conn->protocol.data.state_id) { | |
3831 | case DATA_CONNECTION_STATE_RECEIVE_HEADER: | |
5569b118 | 3832 | status = relay_process_data_receive_header(conn); |
5312a3ed JG |
3833 | break; |
3834 | case DATA_CONNECTION_STATE_RECEIVE_PAYLOAD: | |
5569b118 | 3835 | status = relay_process_data_receive_payload(conn); |
5312a3ed JG |
3836 | break; |
3837 | default: | |
3838 | ERR("Unexpected data connection communication state."); | |
3839 | abort(); | |
3840 | } | |
3841 | ||
5569b118 | 3842 | return status; |
5312a3ed JG |
3843 | } |
3844 | ||
7591bab1 | 3845 | static void cleanup_connection_pollfd(struct lttng_poll_event *events, int pollfd) |
b8aa1682 JD |
3846 | { |
3847 | int ret; | |
3848 | ||
58eb9381 | 3849 | (void) lttng_poll_del(events, pollfd); |
b8aa1682 | 3850 | |
f355467e JG |
3851 | ret = fd_tracker_close_unsuspendable_fd(the_fd_tracker, &pollfd, 1, |
3852 | fd_tracker_util_close_fd, NULL); | |
b8aa1682 JD |
3853 | if (ret < 0) { |
3854 | ERR("Closing pollfd %d", pollfd); | |
3855 | } | |
3856 | } | |
3857 | ||
7591bab1 MD |
3858 | static void relay_thread_close_connection(struct lttng_poll_event *events, |
3859 | int pollfd, struct relay_connection *conn) | |
9d1bbf21 | 3860 | { |
7591bab1 | 3861 | const char *type_str; |
2a174661 | 3862 | |
7591bab1 MD |
3863 | switch (conn->type) { |
3864 | case RELAY_DATA: | |
3865 | type_str = "Data"; | |
3866 | break; | |
3867 | case RELAY_CONTROL: | |
3868 | type_str = "Control"; | |
3869 | break; | |
3870 | case RELAY_VIEWER_COMMAND: | |
3871 | type_str = "Viewer Command"; | |
3872 | break; | |
3873 | case RELAY_VIEWER_NOTIFICATION: | |
3874 | type_str = "Viewer Notification"; | |
3875 | break; | |
3876 | default: | |
3877 | type_str = "Unknown"; | |
9d1bbf21 | 3878 | } |
7591bab1 MD |
3879 | cleanup_connection_pollfd(events, pollfd); |
3880 | connection_put(conn); | |
3881 | DBG("%s connection closed with %d", type_str, pollfd); | |
b8aa1682 JD |
3882 | } |
3883 | ||
3884 | /* | |
3885 | * This thread does the actual work | |
3886 | */ | |
7591bab1 | 3887 | static void *relay_thread_worker(void *data) |
b8aa1682 | 3888 | { |
beaad64c DG |
3889 | int ret, err = -1, last_seen_data_fd = -1; |
3890 | uint32_t nb_fd; | |
b8aa1682 JD |
3891 | struct lttng_poll_event events; |
3892 | struct lttng_ht *relay_connections_ht; | |
b8aa1682 | 3893 | struct lttng_ht_iter iter; |
90e7d72f | 3894 | struct relay_connection *destroy_conn = NULL; |
b8aa1682 JD |
3895 | |
3896 | DBG("[thread] Relay worker started"); | |
3897 | ||
9d1bbf21 MD |
3898 | rcu_register_thread(); |
3899 | ||
55706a7d MD |
3900 | health_register(health_relayd, HEALTH_RELAYD_TYPE_WORKER); |
3901 | ||
9b5e0863 MD |
3902 | if (testpoint(relayd_thread_worker)) { |
3903 | goto error_testpoint; | |
3904 | } | |
3905 | ||
f385ae0a MD |
3906 | health_code_update(); |
3907 | ||
b8aa1682 JD |
3908 | /* table of connections indexed on socket */ |
3909 | relay_connections_ht = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); | |
095a4ae5 MD |
3910 | if (!relay_connections_ht) { |
3911 | goto relay_connections_ht_error; | |
3912 | } | |
b8aa1682 | 3913 | |
e32a0864 | 3914 | ret = create_named_thread_poll_set(&events, 2, "Worker thread epoll"); |
b8aa1682 JD |
3915 | if (ret < 0) { |
3916 | goto error_poll_create; | |
3917 | } | |
3918 | ||
58eb9381 | 3919 | ret = lttng_poll_add(&events, relay_conn_pipe[0], LPOLLIN | LPOLLRDHUP); |
b8aa1682 JD |
3920 | if (ret < 0) { |
3921 | goto error; | |
3922 | } | |
3923 | ||
beaad64c | 3924 | restart: |
b8aa1682 | 3925 | while (1) { |
beaad64c DG |
3926 | int idx = -1, i, seen_control = 0, last_notdel_data_fd = -1; |
3927 | ||
f385ae0a MD |
3928 | health_code_update(); |
3929 | ||
b8aa1682 | 3930 | /* Infinite blocking call, waiting for transmission */ |
87c1611d | 3931 | DBG3("Relayd worker thread polling..."); |
f385ae0a | 3932 | health_poll_entry(); |
b8aa1682 | 3933 | ret = lttng_poll_wait(&events, -1); |
f385ae0a | 3934 | health_poll_exit(); |
b8aa1682 JD |
3935 | if (ret < 0) { |
3936 | /* | |
3937 | * Restart interrupted system call. | |
3938 | */ | |
3939 | if (errno == EINTR) { | |
3940 | goto restart; | |
3941 | } | |
3942 | goto error; | |
3943 | } | |
3944 | ||
0d9c5d77 DG |
3945 | nb_fd = ret; |
3946 | ||
beaad64c | 3947 | /* |
7591bab1 MD |
3948 | * Process control. The control connection is |
3949 | * prioritized so we don't starve it with high | |
3950 | * throughput tracing data on the data connection. | |
beaad64c | 3951 | */ |
b8aa1682 JD |
3952 | for (i = 0; i < nb_fd; i++) { |
3953 | /* Fetch once the poll data */ | |
beaad64c DG |
3954 | uint32_t revents = LTTNG_POLL_GETEV(&events, i); |
3955 | int pollfd = LTTNG_POLL_GETFD(&events, i); | |
b8aa1682 | 3956 | |
f385ae0a MD |
3957 | health_code_update(); |
3958 | ||
b8aa1682 JD |
3959 | /* Thread quit pipe has been closed. Killing thread. */ |
3960 | ret = check_thread_quit_pipe(pollfd, revents); | |
3961 | if (ret) { | |
095a4ae5 MD |
3962 | err = 0; |
3963 | goto exit; | |
b8aa1682 JD |
3964 | } |
3965 | ||
58eb9381 DG |
3966 | /* Inspect the relay conn pipe for new connection */ |
3967 | if (pollfd == relay_conn_pipe[0]) { | |
03e43155 | 3968 | if (revents & LPOLLIN) { |
90e7d72f JG |
3969 | struct relay_connection *conn; |
3970 | ||
58eb9381 | 3971 | ret = lttng_read(relay_conn_pipe[0], &conn, sizeof(conn)); |
b8aa1682 JD |
3972 | if (ret < 0) { |
3973 | goto error; | |
3974 | } | |
73039936 FD |
3975 | ret = lttng_poll_add(&events, |
3976 | conn->sock->fd, | |
58eb9381 | 3977 | LPOLLIN | LPOLLRDHUP); |
73039936 FD |
3978 | if (ret) { |
3979 | ERR("Failed to add new connection file descriptor to poll set"); | |
3980 | goto error; | |
3981 | } | |
7591bab1 | 3982 | connection_ht_add(relay_connections_ht, conn); |
58eb9381 | 3983 | DBG("Connection socket %d added", conn->sock->fd); |
03e43155 MD |
3984 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
3985 | ERR("Relay connection pipe error"); | |
3986 | goto error; | |
3987 | } else { | |
3988 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
3989 | goto error; | |
b8aa1682 | 3990 | } |
58eb9381 | 3991 | } else { |
90e7d72f JG |
3992 | struct relay_connection *ctrl_conn; |
3993 | ||
7591bab1 | 3994 | ctrl_conn = connection_get_by_sock(relay_connections_ht, pollfd); |
58eb9381 | 3995 | /* If not found, there is a synchronization issue. */ |
a0377dfe | 3996 | LTTNG_ASSERT(ctrl_conn); |
58eb9381 | 3997 | |
03e43155 MD |
3998 | if (ctrl_conn->type == RELAY_DATA) { |
3999 | if (revents & LPOLLIN) { | |
beaad64c DG |
4000 | /* |
4001 | * Flag the last seen data fd not deleted. It will be | |
4002 | * used as the last seen fd if any fd gets deleted in | |
4003 | * this first loop. | |
4004 | */ | |
4005 | last_notdel_data_fd = pollfd; | |
4006 | } | |
03e43155 MD |
4007 | goto put_ctrl_connection; |
4008 | } | |
a0377dfe | 4009 | LTTNG_ASSERT(ctrl_conn->type == RELAY_CONTROL); |
03e43155 MD |
4010 | |
4011 | if (revents & LPOLLIN) { | |
5569b118 JG |
4012 | enum relay_connection_status status; |
4013 | ||
4014 | status = relay_process_control(ctrl_conn); | |
4015 | if (status != RELAY_CONNECTION_STATUS_OK) { | |
fd0f1e3e JR |
4016 | /* |
4017 | * On socket error flag the session as aborted to force | |
4018 | * the cleanup of its stream otherwise it can leak | |
4019 | * during the lifetime of the relayd. | |
4020 | * | |
4021 | * This prevents situations in which streams can be | |
4022 | * left opened because an index was received, the | |
4023 | * control connection is closed, and the data | |
4024 | * connection is closed (uncleanly) before the packet's | |
4025 | * data provided. | |
4026 | * | |
4027 | * Since the control connection encountered an error, | |
4028 | * it is okay to be conservative and close the | |
4029 | * session right now as we can't rely on the protocol | |
4030 | * being respected anymore. | |
4031 | */ | |
4032 | if (status == RELAY_CONNECTION_STATUS_ERROR) { | |
4033 | session_abort(ctrl_conn->session); | |
4034 | } | |
4035 | ||
5569b118 | 4036 | /* Clear the connection on error or close. */ |
5312a3ed JG |
4037 | relay_thread_close_connection(&events, |
4038 | pollfd, | |
03e43155 | 4039 | ctrl_conn); |
03e43155 | 4040 | } |
5312a3ed | 4041 | seen_control = 1; |
03e43155 MD |
4042 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
4043 | relay_thread_close_connection(&events, | |
4044 | pollfd, ctrl_conn); | |
4045 | if (last_seen_data_fd == pollfd) { | |
4046 | last_seen_data_fd = last_notdel_data_fd; | |
4047 | } | |
58eb9381 | 4048 | } else { |
03e43155 MD |
4049 | ERR("Unexpected poll events %u for control sock %d", |
4050 | revents, pollfd); | |
4051 | connection_put(ctrl_conn); | |
4052 | goto error; | |
beaad64c | 4053 | } |
03e43155 | 4054 | put_ctrl_connection: |
7591bab1 | 4055 | connection_put(ctrl_conn); |
beaad64c DG |
4056 | } |
4057 | } | |
4058 | ||
4059 | /* | |
4060 | * The last loop handled a control request, go back to poll to make | |
4061 | * sure we prioritise the control socket. | |
4062 | */ | |
4063 | if (seen_control) { | |
4064 | continue; | |
4065 | } | |
4066 | ||
4067 | if (last_seen_data_fd >= 0) { | |
4068 | for (i = 0; i < nb_fd; i++) { | |
4069 | int pollfd = LTTNG_POLL_GETFD(&events, i); | |
f385ae0a MD |
4070 | |
4071 | health_code_update(); | |
4072 | ||
beaad64c DG |
4073 | if (last_seen_data_fd == pollfd) { |
4074 | idx = i; | |
4075 | break; | |
4076 | } | |
4077 | } | |
4078 | } | |
4079 | ||
4080 | /* Process data connection. */ | |
4081 | for (i = idx + 1; i < nb_fd; i++) { | |
4082 | /* Fetch the poll data. */ | |
4083 | uint32_t revents = LTTNG_POLL_GETEV(&events, i); | |
4084 | int pollfd = LTTNG_POLL_GETFD(&events, i); | |
90e7d72f | 4085 | struct relay_connection *data_conn; |
beaad64c | 4086 | |
f385ae0a MD |
4087 | health_code_update(); |
4088 | ||
fd20dac9 MD |
4089 | if (!revents) { |
4090 | /* No activity for this FD (poll implementation). */ | |
4091 | continue; | |
4092 | } | |
4093 | ||
beaad64c | 4094 | /* Skip the command pipe. It's handled in the first loop. */ |
58eb9381 | 4095 | if (pollfd == relay_conn_pipe[0]) { |
beaad64c DG |
4096 | continue; |
4097 | } | |
4098 | ||
7591bab1 | 4099 | data_conn = connection_get_by_sock(relay_connections_ht, pollfd); |
90e7d72f | 4100 | if (!data_conn) { |
fd20dac9 | 4101 | /* Skip it. Might be removed before. */ |
fd20dac9 MD |
4102 | continue; |
4103 | } | |
03e43155 MD |
4104 | if (data_conn->type == RELAY_CONTROL) { |
4105 | goto put_data_connection; | |
4106 | } | |
a0377dfe | 4107 | LTTNG_ASSERT(data_conn->type == RELAY_DATA); |
fd20dac9 MD |
4108 | |
4109 | if (revents & LPOLLIN) { | |
5569b118 JG |
4110 | enum relay_connection_status status; |
4111 | ||
4112 | status = relay_process_data(data_conn); | |
4113 | /* Connection closed or error. */ | |
4114 | if (status != RELAY_CONNECTION_STATUS_OK) { | |
fd0f1e3e JR |
4115 | /* |
4116 | * On socket error flag the session as aborted to force | |
4117 | * the cleanup of its stream otherwise it can leak | |
4118 | * during the lifetime of the relayd. | |
4119 | * | |
4120 | * This prevents situations in which streams can be | |
4121 | * left opened because an index was received, the | |
4122 | * control connection is closed, and the data | |
4123 | * connection is closed (uncleanly) before the packet's | |
4124 | * data provided. | |
4125 | * | |
4126 | * Since the data connection encountered an error, | |
4127 | * it is okay to be conservative and close the | |
4128 | * session right now as we can't rely on the protocol | |
4129 | * being respected anymore. | |
4130 | */ | |
4131 | if (status == RELAY_CONNECTION_STATUS_ERROR) { | |
4132 | session_abort(data_conn->session); | |
4133 | } | |
7591bab1 | 4134 | relay_thread_close_connection(&events, pollfd, |
03e43155 | 4135 | data_conn); |
fd20dac9 MD |
4136 | /* |
4137 | * Every goto restart call sets the last seen fd where | |
4138 | * here we don't really care since we gracefully | |
4139 | * continue the loop after the connection is deleted. | |
4140 | */ | |
4141 | } else { | |
4142 | /* Keep last seen port. */ | |
4143 | last_seen_data_fd = pollfd; | |
7591bab1 | 4144 | connection_put(data_conn); |
fd20dac9 | 4145 | goto restart; |
b8aa1682 | 4146 | } |
03e43155 MD |
4147 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
4148 | relay_thread_close_connection(&events, pollfd, | |
4149 | data_conn); | |
4150 | } else { | |
4151 | ERR("Unknown poll events %u for data sock %d", | |
4152 | revents, pollfd); | |
b8aa1682 | 4153 | } |
03e43155 | 4154 | put_data_connection: |
7591bab1 | 4155 | connection_put(data_conn); |
b8aa1682 | 4156 | } |
beaad64c | 4157 | last_seen_data_fd = -1; |
b8aa1682 JD |
4158 | } |
4159 | ||
f385ae0a MD |
4160 | /* Normal exit, no error */ |
4161 | ret = 0; | |
4162 | ||
095a4ae5 | 4163 | exit: |
b8aa1682 | 4164 | error: |
71efa8ef | 4165 | /* Cleanup remaining connection object. */ |
9d1bbf21 | 4166 | rcu_read_lock(); |
90e7d72f JG |
4167 | cds_lfht_for_each_entry(relay_connections_ht->ht, &iter.iter, |
4168 | destroy_conn, | |
58eb9381 | 4169 | sock_n.node) { |
f385ae0a | 4170 | health_code_update(); |
98ba050e | 4171 | |
fd0f1e3e | 4172 | session_abort(destroy_conn->session); |
98ba050e | 4173 | |
7591bab1 MD |
4174 | /* |
4175 | * No need to grab another ref, because we own | |
4176 | * destroy_conn. | |
4177 | */ | |
4178 | relay_thread_close_connection(&events, destroy_conn->sock->fd, | |
4179 | destroy_conn); | |
b8aa1682 | 4180 | } |
94d49140 | 4181 | rcu_read_unlock(); |
7591bab1 | 4182 | |
e32a0864 | 4183 | (void) fd_tracker_util_poll_clean(the_fd_tracker, &events); |
7d2f7452 | 4184 | error_poll_create: |
b8aa1682 | 4185 | lttng_ht_destroy(relay_connections_ht); |
095a4ae5 | 4186 | relay_connections_ht_error: |
58eb9381 | 4187 | /* Close relay conn pipes */ |
726b2396 JG |
4188 | (void) fd_tracker_util_pipe_close(the_fd_tracker, |
4189 | relay_conn_pipe); | |
095a4ae5 MD |
4190 | if (err) { |
4191 | DBG("Thread exited with error"); | |
4192 | } | |
b8aa1682 | 4193 | DBG("Worker thread cleanup complete"); |
9b5e0863 | 4194 | error_testpoint: |
f385ae0a MD |
4195 | if (err) { |
4196 | health_error(); | |
4197 | ERR("Health error occurred in %s", __func__); | |
4198 | } | |
4199 | health_unregister(health_relayd); | |
9d1bbf21 | 4200 | rcu_unregister_thread(); |
b4aacfdc | 4201 | lttng_relay_stop_threads(); |
b8aa1682 JD |
4202 | return NULL; |
4203 | } | |
4204 | ||
4205 | /* | |
4206 | * Create the relay command pipe to wake thread_manage_apps. | |
4207 | * Closed in cleanup(). | |
4208 | */ | |
58eb9381 | 4209 | static int create_relay_conn_pipe(void) |
b8aa1682 | 4210 | { |
726b2396 JG |
4211 | return fd_tracker_util_pipe_open_cloexec(the_fd_tracker, |
4212 | "Relayd connection pipe", relay_conn_pipe); | |
b8aa1682 JD |
4213 | } |
4214 | ||
9c256b01 JG |
4215 | static int stdio_open(void *data, int *fds) |
4216 | { | |
4217 | fds[0] = fileno(stdout); | |
4218 | fds[1] = fileno(stderr); | |
4219 | return 0; | |
4220 | } | |
4221 | ||
9c256b01 JG |
4222 | static int track_stdio(void) |
4223 | { | |
4224 | int fds[2]; | |
4225 | const char *names[] = { "stdout", "stderr" }; | |
4226 | ||
4227 | return fd_tracker_open_unsuspendable_fd(the_fd_tracker, fds, | |
4228 | names, 2, stdio_open, NULL); | |
4229 | } | |
4230 | ||
b8aa1682 JD |
4231 | /* |
4232 | * main | |
4233 | */ | |
4234 | int main(int argc, char **argv) | |
4235 | { | |
00e3b7f1 | 4236 | bool thread_is_rcu_registered = false; |
178a0557 | 4237 | int ret = 0, retval = 0; |
b8aa1682 | 4238 | void *status; |
f7c3ffd7 | 4239 | char *unlinked_file_directory_path = NULL, *output_path = NULL; |
b8aa1682 | 4240 | |
2a10de3b JR |
4241 | /* Parse environment variables */ |
4242 | ret = parse_env_options(); | |
4243 | if (ret) { | |
4244 | retval = -1; | |
4245 | goto exit_options; | |
4246 | } | |
4247 | ||
4248 | /* | |
4249 | * Parse arguments. | |
4250 | * Command line arguments overwrite environment. | |
4251 | */ | |
b8aa1682 | 4252 | progname = argv[0]; |
178a0557 MD |
4253 | if (set_options(argc, argv)) { |
4254 | retval = -1; | |
4255 | goto exit_options; | |
b8aa1682 JD |
4256 | } |
4257 | ||
178a0557 MD |
4258 | if (set_signal_handler()) { |
4259 | retval = -1; | |
4260 | goto exit_options; | |
b8aa1682 JD |
4261 | } |
4262 | ||
a3bc3918 JR |
4263 | relayd_config_log(); |
4264 | ||
4265 | if (opt_print_version) { | |
4266 | print_version(); | |
4267 | retval = 0; | |
4268 | goto exit_options; | |
4269 | } | |
4270 | ||
c0407718 JG |
4271 | ret = fclose(stdin); |
4272 | if (ret) { | |
4273 | PERROR("Failed to close stdin"); | |
4274 | goto exit_options; | |
4275 | } | |
4276 | ||
35ab25e5 MD |
4277 | DBG("Clear command %s", opt_allow_clear ? "allowed" : "disallowed"); |
4278 | ||
4d513a50 DG |
4279 | /* Try to create directory if -o, --output is specified. */ |
4280 | if (opt_output_path) { | |
994fa64f DG |
4281 | if (*opt_output_path != '/') { |
4282 | ERR("Please specify an absolute path for -o, --output PATH"); | |
178a0557 MD |
4283 | retval = -1; |
4284 | goto exit_options; | |
994fa64f DG |
4285 | } |
4286 | ||
d77dded2 JG |
4287 | ret = utils_mkdir_recursive(opt_output_path, S_IRWXU | S_IRWXG, |
4288 | -1, -1); | |
4d513a50 DG |
4289 | if (ret < 0) { |
4290 | ERR("Unable to create %s", opt_output_path); | |
178a0557 MD |
4291 | retval = -1; |
4292 | goto exit_options; | |
4d513a50 DG |
4293 | } |
4294 | } | |
4295 | ||
b8aa1682 | 4296 | /* Daemonize */ |
b5218ffb | 4297 | if (opt_daemon || opt_background) { |
3fd27398 MD |
4298 | ret = lttng_daemonize(&child_ppid, &recv_child_signal, |
4299 | !opt_background); | |
b8aa1682 | 4300 | if (ret < 0) { |
178a0557 MD |
4301 | retval = -1; |
4302 | goto exit_options; | |
b8aa1682 | 4303 | } |
3fd27398 MD |
4304 | } |
4305 | ||
ce9ee1fb JR |
4306 | if (opt_working_directory) { |
4307 | ret = utils_change_working_directory(opt_working_directory); | |
4308 | if (ret) { | |
4309 | /* All errors are already logged. */ | |
4310 | goto exit_options; | |
4311 | } | |
4312 | } | |
4313 | ||
23c8ff50 JG |
4314 | sessiond_trace_chunk_registry = sessiond_trace_chunk_registry_create(); |
4315 | if (!sessiond_trace_chunk_registry) { | |
4316 | ERR("Failed to initialize session daemon trace chunk registry"); | |
4317 | retval = -1; | |
794e2e5f | 4318 | goto exit_options; |
23c8ff50 JG |
4319 | } |
4320 | ||
00e3b7f1 JG |
4321 | /* |
4322 | * The RCU thread registration (and use, through the fd-tracker's | |
4323 | * creation) is done after the daemonization to allow us to not | |
4324 | * deal with liburcu's fork() management as the call RCU needs to | |
4325 | * be restored. | |
4326 | */ | |
4327 | rcu_register_thread(); | |
4328 | thread_is_rcu_registered = true; | |
4329 | ||
f7c3ffd7 JG |
4330 | output_path = create_output_path(""); |
4331 | if (!output_path) { | |
4332 | ERR("Failed to get output path"); | |
4333 | retval = -1; | |
4334 | goto exit_options; | |
4335 | } | |
4336 | ret = asprintf(&unlinked_file_directory_path, "%s/%s", output_path, | |
4337 | DEFAULT_UNLINKED_FILES_DIRECTORY); | |
4338 | free(output_path); | |
4339 | if (ret < 0) { | |
4340 | ERR("Failed to format unlinked file directory path"); | |
4341 | retval = -1; | |
4342 | goto exit_options; | |
4343 | } | |
4344 | the_fd_tracker = fd_tracker_create( | |
4345 | unlinked_file_directory_path, lttng_opt_fd_pool_size); | |
4346 | free(unlinked_file_directory_path); | |
00e3b7f1 JG |
4347 | if (!the_fd_tracker) { |
4348 | retval = -1; | |
4349 | goto exit_options; | |
4350 | } | |
4351 | ||
9c256b01 JG |
4352 | ret = track_stdio(); |
4353 | if (ret) { | |
4354 | retval = -1; | |
4355 | goto exit_options; | |
4356 | } | |
4357 | ||
178a0557 MD |
4358 | /* Initialize thread health monitoring */ |
4359 | health_relayd = health_app_create(NR_HEALTH_RELAYD_TYPES); | |
4360 | if (!health_relayd) { | |
4361 | PERROR("health_app_create error"); | |
4362 | retval = -1; | |
794e2e5f | 4363 | goto exit_options; |
178a0557 MD |
4364 | } |
4365 | ||
3fd27398 | 4366 | /* Create thread quit pipe */ |
178a0557 MD |
4367 | if (init_thread_quit_pipe()) { |
4368 | retval = -1; | |
794e2e5f | 4369 | goto exit_options; |
b8aa1682 JD |
4370 | } |
4371 | ||
b8aa1682 | 4372 | /* Setup the thread apps communication pipe. */ |
178a0557 MD |
4373 | if (create_relay_conn_pipe()) { |
4374 | retval = -1; | |
794e2e5f | 4375 | goto exit_options; |
b8aa1682 JD |
4376 | } |
4377 | ||
4378 | /* Init relay command queue. */ | |
8bdee6e2 | 4379 | cds_wfcq_init(&relay_conn_queue.head, &relay_conn_queue.tail); |
b8aa1682 | 4380 | |
554831e7 MD |
4381 | /* Initialize communication library */ |
4382 | lttcomm_init(); | |
87e45c13 | 4383 | lttcomm_inet_init(); |
554831e7 | 4384 | |
d3e2ba59 | 4385 | /* tables of sessions indexed by session ID */ |
7591bab1 MD |
4386 | sessions_ht = lttng_ht_new(0, LTTNG_HT_TYPE_U64); |
4387 | if (!sessions_ht) { | |
178a0557 | 4388 | retval = -1; |
794e2e5f | 4389 | goto exit_options; |
d3e2ba59 JD |
4390 | } |
4391 | ||
4392 | /* tables of streams indexed by stream ID */ | |
2a174661 | 4393 | relay_streams_ht = lttng_ht_new(0, LTTNG_HT_TYPE_U64); |
d3e2ba59 | 4394 | if (!relay_streams_ht) { |
178a0557 | 4395 | retval = -1; |
794e2e5f | 4396 | goto exit_options; |
d3e2ba59 JD |
4397 | } |
4398 | ||
4399 | /* tables of streams indexed by stream ID */ | |
92c6ca54 DG |
4400 | viewer_streams_ht = lttng_ht_new(0, LTTNG_HT_TYPE_U64); |
4401 | if (!viewer_streams_ht) { | |
178a0557 | 4402 | retval = -1; |
794e2e5f | 4403 | goto exit_options; |
55706a7d MD |
4404 | } |
4405 | ||
bcee2b96 | 4406 | ret = init_health_quit_pipe(); |
178a0557 MD |
4407 | if (ret) { |
4408 | retval = -1; | |
794e2e5f | 4409 | goto exit_options; |
65931c8b MD |
4410 | } |
4411 | ||
4412 | /* Create thread to manage the client socket */ | |
1a1a34b4 | 4413 | ret = pthread_create(&health_thread, default_pthread_attr(), |
65931c8b | 4414 | thread_manage_health, (void *) NULL); |
178a0557 MD |
4415 | if (ret) { |
4416 | errno = ret; | |
65931c8b | 4417 | PERROR("pthread_create health"); |
178a0557 | 4418 | retval = -1; |
794e2e5f | 4419 | goto exit_options; |
65931c8b MD |
4420 | } |
4421 | ||
b8aa1682 | 4422 | /* Setup the dispatcher thread */ |
1a1a34b4 | 4423 | ret = pthread_create(&dispatcher_thread, default_pthread_attr(), |
b8aa1682 | 4424 | relay_thread_dispatcher, (void *) NULL); |
178a0557 MD |
4425 | if (ret) { |
4426 | errno = ret; | |
b8aa1682 | 4427 | PERROR("pthread_create dispatcher"); |
178a0557 MD |
4428 | retval = -1; |
4429 | goto exit_dispatcher_thread; | |
b8aa1682 JD |
4430 | } |
4431 | ||
4432 | /* Setup the worker thread */ | |
1a1a34b4 | 4433 | ret = pthread_create(&worker_thread, default_pthread_attr(), |
7591bab1 | 4434 | relay_thread_worker, NULL); |
178a0557 MD |
4435 | if (ret) { |
4436 | errno = ret; | |
b8aa1682 | 4437 | PERROR("pthread_create worker"); |
178a0557 MD |
4438 | retval = -1; |
4439 | goto exit_worker_thread; | |
b8aa1682 JD |
4440 | } |
4441 | ||
4442 | /* Setup the listener thread */ | |
1a1a34b4 | 4443 | ret = pthread_create(&listener_thread, default_pthread_attr(), |
b8aa1682 | 4444 | relay_thread_listener, (void *) NULL); |
178a0557 MD |
4445 | if (ret) { |
4446 | errno = ret; | |
b8aa1682 | 4447 | PERROR("pthread_create listener"); |
178a0557 MD |
4448 | retval = -1; |
4449 | goto exit_listener_thread; | |
b8aa1682 JD |
4450 | } |
4451 | ||
7591bab1 | 4452 | ret = relayd_live_create(live_uri); |
178a0557 | 4453 | if (ret) { |
d3e2ba59 | 4454 | ERR("Starting live viewer threads"); |
178a0557 | 4455 | retval = -1; |
50138f51 | 4456 | goto exit_live; |
d3e2ba59 JD |
4457 | } |
4458 | ||
178a0557 MD |
4459 | /* |
4460 | * This is where we start awaiting program completion (e.g. through | |
4461 | * signal that asks threads to teardown). | |
4462 | */ | |
4463 | ||
4464 | ret = relayd_live_join(); | |
4465 | if (ret) { | |
4466 | retval = -1; | |
4467 | } | |
50138f51 | 4468 | exit_live: |
178a0557 | 4469 | |
b8aa1682 | 4470 | ret = pthread_join(listener_thread, &status); |
178a0557 MD |
4471 | if (ret) { |
4472 | errno = ret; | |
4473 | PERROR("pthread_join listener_thread"); | |
4474 | retval = -1; | |
b8aa1682 JD |
4475 | } |
4476 | ||
178a0557 | 4477 | exit_listener_thread: |
b8aa1682 | 4478 | ret = pthread_join(worker_thread, &status); |
178a0557 MD |
4479 | if (ret) { |
4480 | errno = ret; | |
4481 | PERROR("pthread_join worker_thread"); | |
4482 | retval = -1; | |
b8aa1682 JD |
4483 | } |
4484 | ||
178a0557 | 4485 | exit_worker_thread: |
b8aa1682 | 4486 | ret = pthread_join(dispatcher_thread, &status); |
178a0557 MD |
4487 | if (ret) { |
4488 | errno = ret; | |
4489 | PERROR("pthread_join dispatcher_thread"); | |
4490 | retval = -1; | |
b8aa1682 | 4491 | } |
178a0557 | 4492 | exit_dispatcher_thread: |
42415026 | 4493 | |
65931c8b | 4494 | ret = pthread_join(health_thread, &status); |
178a0557 MD |
4495 | if (ret) { |
4496 | errno = ret; | |
4497 | PERROR("pthread_join health_thread"); | |
4498 | retval = -1; | |
65931c8b | 4499 | } |
178a0557 | 4500 | exit_options: |
4d62fbf8 MD |
4501 | /* |
4502 | * Wait for all pending call_rcu work to complete before tearing | |
4503 | * down data structures. call_rcu worker may be trying to | |
4504 | * perform lookups in those structures. | |
4505 | */ | |
4506 | rcu_barrier(); | |
7591bab1 MD |
4507 | relayd_cleanup(); |
4508 | ||
4509 | /* Ensure all prior call_rcu are done. */ | |
4510 | rcu_barrier(); | |
d3e2ba59 | 4511 | |
00e3b7f1 JG |
4512 | if (thread_is_rcu_registered) { |
4513 | rcu_unregister_thread(); | |
4514 | } | |
4515 | ||
178a0557 | 4516 | if (!retval) { |
b8aa1682 | 4517 | exit(EXIT_SUCCESS); |
178a0557 MD |
4518 | } else { |
4519 | exit(EXIT_FAILURE); | |
b8aa1682 | 4520 | } |
b8aa1682 | 4521 | } |