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> | |
c9e313bc SM |
39 | #include <common/common.hpp> |
40 | #include <common/compat/poll.hpp> | |
41 | #include <common/compat/socket.hpp> | |
42 | #include <common/compat/endian.hpp> | |
43 | #include <common/compat/getenv.hpp> | |
44 | #include <common/defaults.hpp> | |
45 | #include <common/daemonize.hpp> | |
46 | #include <common/futex.hpp> | |
47 | #include <common/sessiond-comm/sessiond-comm.hpp> | |
48 | #include <common/sessiond-comm/inet.hpp> | |
49 | #include <common/sessiond-comm/relayd.hpp> | |
50 | #include <common/uri.hpp> | |
51 | #include <common/utils.hpp> | |
52 | #include <common/path.hpp> | |
53 | #include <common/align.hpp> | |
54 | #include <common/ini-config/ini-config.hpp> | |
55 | #include <common/dynamic-buffer.hpp> | |
56 | #include <common/buffer-view.hpp> | |
57 | #include <common/string-utils/format.hpp> | |
58 | #include <common/fd-tracker/fd-tracker.hpp> | |
59 | #include <common/fd-tracker/utils.hpp> | |
b8aa1682 | 60 | |
c9e313bc SM |
61 | #include "backward-compatibility-group-by.hpp" |
62 | #include "cmd.hpp" | |
63 | #include "connection.hpp" | |
64 | #include "ctf-trace.hpp" | |
65 | #include "health-relayd.hpp" | |
66 | #include "index.hpp" | |
67 | #include "live.hpp" | |
68 | #include "lttng-relayd.hpp" | |
69 | #include "session.hpp" | |
70 | #include "sessiond-trace-chunks.hpp" | |
71 | #include "stream.hpp" | |
72 | #include "tcp_keep_alive.hpp" | |
73 | #include "testpoint.hpp" | |
74 | #include "tracefile-array.hpp" | |
75 | #include "utils.hpp" | |
76 | #include "version.hpp" | |
77 | #include "viewer-stream.hpp" | |
b8aa1682 | 78 | |
4fc83d94 PP |
79 | static const char *help_msg = |
80 | #ifdef LTTNG_EMBED_HELP | |
81 | #include <lttng-relayd.8.h> | |
82 | #else | |
83 | NULL | |
84 | #endif | |
85 | ; | |
86 | ||
5569b118 JG |
87 | enum relay_connection_status { |
88 | RELAY_CONNECTION_STATUS_OK, | |
a9577b76 | 89 | /* An error occurred while processing an event on the connection. */ |
5569b118 JG |
90 | RELAY_CONNECTION_STATUS_ERROR, |
91 | /* Connection closed/shutdown cleanly. */ | |
92 | RELAY_CONNECTION_STATUS_CLOSED, | |
93 | }; | |
94 | ||
b8aa1682 | 95 | /* command line options */ |
ce9ee1fb | 96 | char *opt_output_path, *opt_working_directory; |
35ab25e5 | 97 | static int opt_daemon, opt_background, opt_print_version, opt_allow_clear = 1; |
3e38c8b3 | 98 | static int opt_allow_ctf2 = 1; |
a8b66566 | 99 | enum relay_group_output_by opt_group_output_by = RELAYD_GROUP_OUTPUT_BY_UNKNOWN; |
3fd27398 | 100 | |
e56e5792 MJ |
101 | /* Argument variables */ |
102 | int lttng_opt_quiet; /* not static in error.h */ | |
103 | int lttng_opt_verbose; /* not static in error.h */ | |
104 | int lttng_opt_mi; /* not static in error.h */ | |
105 | ||
3fd27398 MD |
106 | /* |
107 | * We need to wait for listener and live listener threads, as well as | |
108 | * health check thread, before being ready to signal readiness. | |
109 | */ | |
110 | #define NR_LTTNG_RELAY_READY 3 | |
111 | static int lttng_relay_ready = NR_LTTNG_RELAY_READY; | |
0848dba7 MD |
112 | |
113 | /* Size of receive buffer. */ | |
114 | #define RECV_DATA_BUFFER_SIZE 65536 | |
115 | ||
3fd27398 MD |
116 | static int recv_child_signal; /* Set to 1 when a SIGUSR1 signal is received. */ |
117 | static pid_t child_ppid; /* Internal parent PID use with daemonize. */ | |
118 | ||
095a4ae5 MD |
119 | static struct lttng_uri *control_uri; |
120 | static struct lttng_uri *data_uri; | |
d3e2ba59 | 121 | static struct lttng_uri *live_uri; |
b8aa1682 JD |
122 | |
123 | const char *progname; | |
b8aa1682 | 124 | |
65931c8b | 125 | const char *tracing_group_name = DEFAULT_TRACING_GROUP; |
cd60b05a JG |
126 | static int tracing_group_name_override; |
127 | ||
128 | const char * const config_section_name = "relayd"; | |
65931c8b | 129 | |
b8aa1682 JD |
130 | /* |
131 | * Quit pipe for all threads. This permits a single cancellation point | |
132 | * for all threads when receiving an event on the pipe. | |
133 | */ | |
0b242f62 | 134 | int thread_quit_pipe[2] = { -1, -1 }; |
b8aa1682 JD |
135 | |
136 | /* | |
137 | * This pipe is used to inform the worker thread that a command is queued and | |
138 | * ready to be processed. | |
139 | */ | |
58eb9381 | 140 | static int relay_conn_pipe[2] = { -1, -1 }; |
b8aa1682 | 141 | |
26c9d55e | 142 | /* Shared between threads */ |
b8aa1682 JD |
143 | static int dispatch_thread_exit; |
144 | ||
145 | static pthread_t listener_thread; | |
146 | static pthread_t dispatcher_thread; | |
147 | static pthread_t worker_thread; | |
65931c8b | 148 | static pthread_t health_thread; |
b8aa1682 | 149 | |
7591bab1 MD |
150 | /* |
151 | * last_relay_stream_id_lock protects last_relay_stream_id increment | |
152 | * atomicity on 32-bit architectures. | |
153 | */ | |
154 | static pthread_mutex_t last_relay_stream_id_lock = PTHREAD_MUTEX_INITIALIZER; | |
095a4ae5 | 155 | static uint64_t last_relay_stream_id; |
b8aa1682 JD |
156 | |
157 | /* | |
158 | * Relay command queue. | |
159 | * | |
160 | * The relay_thread_listener and relay_thread_dispatcher communicate with this | |
161 | * queue. | |
162 | */ | |
58eb9381 | 163 | static struct relay_conn_queue relay_conn_queue; |
b8aa1682 | 164 | |
896010e3 | 165 | /* Cap of file desriptors to be in simultaneous use by the relay daemon. */ |
5c0551f9 | 166 | static unsigned int lttng_opt_fd_pool_size = -1; |
896010e3 | 167 | |
d3e2ba59 JD |
168 | /* Global relay stream hash table. */ |
169 | struct lttng_ht *relay_streams_ht; | |
170 | ||
92c6ca54 DG |
171 | /* Global relay viewer stream hash table. */ |
172 | struct lttng_ht *viewer_streams_ht; | |
173 | ||
7591bab1 MD |
174 | /* Global relay sessions hash table. */ |
175 | struct lttng_ht *sessions_ht; | |
0a6518b0 | 176 | |
55706a7d | 177 | /* Relayd health monitoring */ |
eea7556c | 178 | struct health_app *health_relayd; |
55706a7d | 179 | |
23c8ff50 JG |
180 | struct sessiond_trace_chunk_registry *sessiond_trace_chunk_registry; |
181 | ||
00e3b7f1 JG |
182 | /* Global fd tracker. */ |
183 | struct fd_tracker *the_fd_tracker; | |
184 | ||
cd60b05a JG |
185 | static struct option long_options[] = { |
186 | { "control-port", 1, 0, 'C', }, | |
187 | { "data-port", 1, 0, 'D', }, | |
8d5c808e | 188 | { "live-port", 1, 0, 'L', }, |
cd60b05a | 189 | { "daemonize", 0, 0, 'd', }, |
b5218ffb | 190 | { "background", 0, 0, 'b', }, |
cd60b05a | 191 | { "group", 1, 0, 'g', }, |
5c0551f9 | 192 | { "fd-pool-size", 1, 0, '\0', }, |
cd60b05a JG |
193 | { "help", 0, 0, 'h', }, |
194 | { "output", 1, 0, 'o', }, | |
195 | { "verbose", 0, 0, 'v', }, | |
196 | { "config", 1, 0, 'f' }, | |
3a904098 | 197 | { "version", 0, 0, 'V' }, |
ce9ee1fb | 198 | { "working-directory", 1, 0, 'w', }, |
a8b66566 JR |
199 | { "group-output-by-session", 0, 0, 's', }, |
200 | { "group-output-by-host", 0, 0, 'p', }, | |
35ab25e5 | 201 | { "disallow-clear", 0, 0, 'x' }, |
3e38c8b3 | 202 | { "disallow-ctf2", 0, 0, 'y' }, |
cd60b05a JG |
203 | { NULL, 0, 0, 0, }, |
204 | }; | |
205 | ||
3a904098 | 206 | static const char *config_ignore_options[] = { "help", "config", "version" }; |
cd60b05a | 207 | |
a3bc3918 JR |
208 | static void print_version(void) { |
209 | fprintf(stdout, "%s\n", VERSION); | |
210 | } | |
211 | ||
212 | static void relayd_config_log(void) | |
213 | { | |
214 | DBG("LTTng-relayd " VERSION " - " VERSION_NAME "%s%s", | |
215 | GIT_VERSION[0] == '\0' ? "" : " - " GIT_VERSION, | |
216 | EXTRA_VERSION_NAME[0] == '\0' ? "" : " - " EXTRA_VERSION_NAME); | |
217 | if (EXTRA_VERSION_DESCRIPTION[0] != '\0') { | |
218 | DBG("LTTng-relayd extra version description:\n\t" EXTRA_VERSION_DESCRIPTION "\n"); | |
219 | } | |
7f5ed73a JR |
220 | if (EXTRA_VERSION_PATCHES[0] != '\0') { |
221 | DBG("LTTng-relayd extra patches:\n\t" EXTRA_VERSION_PATCHES "\n"); | |
222 | } | |
3e38c8b3 JR |
223 | |
224 | DBG("Trace format supported: %s%s", "ctf1", opt_allow_ctf2 ? ", ctf2" : ""); | |
a3bc3918 JR |
225 | } |
226 | ||
cd60b05a JG |
227 | /* |
228 | * Take an option from the getopt output and set it in the right variable to be | |
229 | * used later. | |
230 | * | |
231 | * Return 0 on success else a negative value. | |
232 | */ | |
7591bab1 | 233 | static int set_option(int opt, const char *arg, const char *optname) |
b8aa1682 | 234 | { |
cd60b05a JG |
235 | int ret; |
236 | ||
237 | switch (opt) { | |
238 | case 0: | |
5c0551f9 | 239 | if (!strcmp(optname, "fd-pool-size")) { |
896010e3 JG |
240 | unsigned long v; |
241 | ||
242 | errno = 0; | |
243 | v = strtoul(arg, NULL, 0); | |
60b7e1f8 | 244 | if (errno != 0 || !isdigit((unsigned char) arg[0])) { |
5c0551f9 | 245 | ERR("Wrong value in --fd-pool-size parameter: %s", arg); |
896010e3 JG |
246 | ret = -1; |
247 | goto end; | |
248 | } | |
896010e3 | 249 | if (v >= UINT_MAX) { |
5c0551f9 | 250 | ERR("File descriptor cap overflow in --fd-pool-size parameter: %s", arg); |
896010e3 JG |
251 | ret = -1; |
252 | goto end; | |
253 | } | |
5c0551f9 | 254 | lttng_opt_fd_pool_size = (unsigned int) v; |
896010e3 JG |
255 | } else { |
256 | fprintf(stderr, "unknown option %s", optname); | |
257 | if (arg) { | |
258 | fprintf(stderr, " with arg %s\n", arg); | |
259 | } | |
cd60b05a JG |
260 | } |
261 | break; | |
262 | case 'C': | |
e8fa9fb0 MD |
263 | if (lttng_is_setuid_setgid()) { |
264 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
265 | "-C, --control-port"); | |
266 | } else { | |
267 | ret = uri_parse(arg, &control_uri); | |
268 | if (ret < 0) { | |
269 | ERR("Invalid control URI specified"); | |
270 | goto end; | |
271 | } | |
272 | if (control_uri->port == 0) { | |
273 | control_uri->port = DEFAULT_NETWORK_CONTROL_PORT; | |
274 | } | |
cd60b05a JG |
275 | } |
276 | break; | |
277 | case 'D': | |
e8fa9fb0 MD |
278 | if (lttng_is_setuid_setgid()) { |
279 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
280 | "-D, -data-port"); | |
281 | } else { | |
282 | ret = uri_parse(arg, &data_uri); | |
283 | if (ret < 0) { | |
284 | ERR("Invalid data URI specified"); | |
285 | goto end; | |
286 | } | |
287 | if (data_uri->port == 0) { | |
288 | data_uri->port = DEFAULT_NETWORK_DATA_PORT; | |
289 | } | |
cd60b05a JG |
290 | } |
291 | break; | |
8d5c808e | 292 | case 'L': |
e8fa9fb0 MD |
293 | if (lttng_is_setuid_setgid()) { |
294 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
295 | "-L, -live-port"); | |
296 | } else { | |
297 | ret = uri_parse(arg, &live_uri); | |
298 | if (ret < 0) { | |
299 | ERR("Invalid live URI specified"); | |
300 | goto end; | |
301 | } | |
302 | if (live_uri->port == 0) { | |
303 | live_uri->port = DEFAULT_NETWORK_VIEWER_PORT; | |
304 | } | |
8d5c808e AM |
305 | } |
306 | break; | |
cd60b05a JG |
307 | case 'd': |
308 | opt_daemon = 1; | |
309 | break; | |
b5218ffb MD |
310 | case 'b': |
311 | opt_background = 1; | |
312 | break; | |
cd60b05a | 313 | case 'g': |
e8fa9fb0 MD |
314 | if (lttng_is_setuid_setgid()) { |
315 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
316 | "-g, --group"); | |
317 | } else { | |
318 | tracing_group_name = strdup(arg); | |
319 | if (tracing_group_name == NULL) { | |
320 | ret = -errno; | |
321 | PERROR("strdup"); | |
322 | goto end; | |
323 | } | |
324 | tracing_group_name_override = 1; | |
330a40bb | 325 | } |
cd60b05a JG |
326 | break; |
327 | case 'h': | |
4fc83d94 | 328 | ret = utils_show_help(8, "lttng-relayd", help_msg); |
655b5cc1 | 329 | if (ret) { |
4fc83d94 | 330 | ERR("Cannot show --help for `lttng-relayd`"); |
655b5cc1 PP |
331 | perror("exec"); |
332 | } | |
cd60b05a | 333 | exit(EXIT_FAILURE); |
3a904098 | 334 | case 'V': |
a3bc3918 JR |
335 | opt_print_version = 1; |
336 | break; | |
cd60b05a | 337 | case 'o': |
e8fa9fb0 MD |
338 | if (lttng_is_setuid_setgid()) { |
339 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
340 | "-o, --output"); | |
341 | } else { | |
342 | ret = asprintf(&opt_output_path, "%s", arg); | |
343 | if (ret < 0) { | |
344 | ret = -errno; | |
345 | PERROR("asprintf opt_output_path"); | |
346 | goto end; | |
347 | } | |
cd60b05a JG |
348 | } |
349 | break; | |
ce9ee1fb JR |
350 | case 'w': |
351 | if (lttng_is_setuid_setgid()) { | |
352 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
353 | "-w, --working-directory"); | |
354 | } else { | |
355 | ret = asprintf(&opt_working_directory, "%s", arg); | |
356 | if (ret < 0) { | |
357 | ret = -errno; | |
358 | PERROR("asprintf opt_working_directory"); | |
359 | goto end; | |
360 | } | |
361 | } | |
362 | break; | |
363 | ||
cd60b05a JG |
364 | case 'v': |
365 | /* Verbose level can increase using multiple -v */ | |
366 | if (arg) { | |
367 | lttng_opt_verbose = config_parse_value(arg); | |
368 | } else { | |
849e5b7b DG |
369 | /* Only 3 level of verbosity (-vvv). */ |
370 | if (lttng_opt_verbose < 3) { | |
371 | lttng_opt_verbose += 1; | |
372 | } | |
cd60b05a JG |
373 | } |
374 | break; | |
a8b66566 JR |
375 | case 's': |
376 | if (opt_group_output_by != RELAYD_GROUP_OUTPUT_BY_UNKNOWN) { | |
377 | ERR("Cannot set --group-output-by-session, another --group-output-by argument is present"); | |
378 | exit(EXIT_FAILURE); | |
379 | } | |
380 | opt_group_output_by = RELAYD_GROUP_OUTPUT_BY_SESSION; | |
381 | break; | |
382 | case 'p': | |
383 | if (opt_group_output_by != RELAYD_GROUP_OUTPUT_BY_UNKNOWN) { | |
384 | ERR("Cannot set --group-output-by-host, another --group-output-by argument is present"); | |
385 | exit(EXIT_FAILURE); | |
386 | } | |
387 | opt_group_output_by = RELAYD_GROUP_OUTPUT_BY_HOST; | |
388 | break; | |
35ab25e5 MD |
389 | case 'x': |
390 | /* Disallow clear */ | |
391 | opt_allow_clear = 0; | |
392 | break; | |
3e38c8b3 JR |
393 | case 'y': |
394 | /* Disallow clear */ | |
395 | opt_allow_ctf2 = 0; | |
396 | break; | |
cd60b05a JG |
397 | default: |
398 | /* Unknown option or other error. | |
399 | * Error is printed by getopt, just return */ | |
400 | ret = -1; | |
401 | goto end; | |
402 | } | |
403 | ||
404 | /* All good. */ | |
405 | ret = 0; | |
406 | ||
407 | end: | |
408 | return ret; | |
409 | } | |
410 | ||
411 | /* | |
412 | * config_entry_handler_cb used to handle options read from a config file. | |
f40ef1d5 | 413 | * See config_entry_handler_cb comment in common/config/session-config.h for the |
cd60b05a JG |
414 | * return value conventions. |
415 | */ | |
f46376a1 MJ |
416 | static int config_entry_handler(const struct config_entry *entry, |
417 | void *unused __attribute__((unused))) | |
cd60b05a JG |
418 | { |
419 | int ret = 0, i; | |
420 | ||
421 | if (!entry || !entry->name || !entry->value) { | |
422 | ret = -EINVAL; | |
423 | goto end; | |
424 | } | |
425 | ||
426 | /* Check if the option is to be ignored */ | |
427 | for (i = 0; i < sizeof(config_ignore_options) / sizeof(char *); i++) { | |
428 | if (!strcmp(entry->name, config_ignore_options[i])) { | |
429 | goto end; | |
430 | } | |
431 | } | |
432 | ||
433 | for (i = 0; i < (sizeof(long_options) / sizeof(struct option)) - 1; i++) { | |
434 | /* Ignore if entry name is not fully matched. */ | |
435 | if (strcmp(entry->name, long_options[i].name)) { | |
436 | continue; | |
437 | } | |
438 | ||
439 | /* | |
7591bab1 MD |
440 | * If the option takes no argument on the command line, |
441 | * we have to check if the value is "true". We support | |
442 | * non-zero numeric values, true, on and yes. | |
cd60b05a JG |
443 | */ |
444 | if (!long_options[i].has_arg) { | |
445 | ret = config_parse_value(entry->value); | |
446 | if (ret <= 0) { | |
447 | if (ret) { | |
448 | WARN("Invalid configuration value \"%s\" for option %s", | |
449 | entry->value, entry->name); | |
450 | } | |
451 | /* False, skip boolean config option. */ | |
452 | goto end; | |
453 | } | |
454 | } | |
455 | ||
456 | ret = set_option(long_options[i].val, entry->value, entry->name); | |
457 | goto end; | |
458 | } | |
459 | ||
460 | WARN("Unrecognized option \"%s\" in daemon configuration file.", | |
461 | entry->name); | |
462 | ||
463 | end: | |
464 | return ret; | |
465 | } | |
466 | ||
2a10de3b JR |
467 | static int parse_env_options(void) |
468 | { | |
469 | int ret = 0; | |
470 | char *value = NULL; | |
471 | ||
472 | value = lttng_secure_getenv(DEFAULT_LTTNG_RELAYD_WORKING_DIRECTORY_ENV); | |
473 | if (value) { | |
474 | opt_working_directory = strdup(value); | |
475 | if (!opt_working_directory) { | |
476 | ERR("Failed to allocate working directory string (\"%s\")", | |
477 | value); | |
478 | ret = -1; | |
479 | } | |
480 | } | |
481 | return ret; | |
482 | } | |
483 | ||
5c0551f9 JG |
484 | static int set_fd_pool_size(void) |
485 | { | |
486 | int ret = 0; | |
487 | struct rlimit rlimit; | |
488 | ||
489 | ret = getrlimit(RLIMIT_NOFILE, &rlimit); | |
490 | if (ret) { | |
491 | PERROR("Failed to get file descriptor limit"); | |
492 | ret = -1; | |
493 | goto end; | |
494 | } | |
495 | ||
496 | DBG("File descriptor count limits are %" PRIu64 " (soft) and %" PRIu64 " (hard)", | |
497 | (uint64_t) rlimit.rlim_cur, | |
498 | (uint64_t) rlimit.rlim_max); | |
499 | if (lttng_opt_fd_pool_size == -1) { | |
500 | /* Use default value (soft limit - reserve). */ | |
501 | if (rlimit.rlim_cur < DEFAULT_RELAYD_MIN_FD_POOL_SIZE) { | |
502 | ERR("The process' file number limit is too low (%" PRIu64 "). The process' file number limit must be set to at least %i.", | |
503 | (uint64_t) rlimit.rlim_cur, DEFAULT_RELAYD_MIN_FD_POOL_SIZE); | |
504 | ret = -1; | |
505 | goto end; | |
506 | } | |
507 | lttng_opt_fd_pool_size = rlimit.rlim_cur - | |
508 | DEFAULT_RELAYD_FD_POOL_SIZE_RESERVE; | |
509 | goto end; | |
510 | } | |
511 | ||
512 | if (lttng_opt_fd_pool_size < DEFAULT_RELAYD_MIN_FD_POOL_SIZE) { | |
513 | ERR("File descriptor pool size must be set to at least %d", | |
514 | DEFAULT_RELAYD_MIN_FD_POOL_SIZE); | |
515 | ret = -1; | |
516 | goto end; | |
517 | } | |
518 | ||
519 | if (lttng_opt_fd_pool_size > rlimit.rlim_cur) { | |
520 | ERR("File descriptor pool size argument (%u) exceeds the process' soft limit (%" PRIu64 ").", | |
521 | lttng_opt_fd_pool_size, (uint64_t) rlimit.rlim_cur); | |
522 | ret = -1; | |
523 | goto end; | |
524 | } | |
525 | ||
d49487dc | 526 | DBG("File descriptor pool size argument (%u) adjusted to %u to accommodates transient fd uses", |
5c0551f9 JG |
527 | lttng_opt_fd_pool_size, |
528 | lttng_opt_fd_pool_size - DEFAULT_RELAYD_FD_POOL_SIZE_RESERVE); | |
529 | lttng_opt_fd_pool_size -= DEFAULT_RELAYD_FD_POOL_SIZE_RESERVE; | |
530 | end: | |
531 | return ret; | |
532 | } | |
533 | ||
7591bab1 | 534 | static int set_options(int argc, char **argv) |
cd60b05a | 535 | { |
178a0557 | 536 | int c, ret = 0, option_index = 0, retval = 0; |
cd60b05a JG |
537 | int orig_optopt = optopt, orig_optind = optind; |
538 | char *default_address, *optstring; | |
3a9e5d16 | 539 | char *config_path = NULL; |
cd60b05a JG |
540 | |
541 | optstring = utils_generate_optstring(long_options, | |
542 | sizeof(long_options) / sizeof(struct option)); | |
543 | if (!optstring) { | |
178a0557 | 544 | retval = -ENOMEM; |
cd60b05a JG |
545 | goto exit; |
546 | } | |
547 | ||
548 | /* Check for the --config option */ | |
549 | ||
550 | while ((c = getopt_long(argc, argv, optstring, long_options, | |
551 | &option_index)) != -1) { | |
552 | if (c == '?') { | |
178a0557 | 553 | retval = -EINVAL; |
cd60b05a JG |
554 | goto exit; |
555 | } else if (c != 'f') { | |
556 | continue; | |
557 | } | |
558 | ||
e8fa9fb0 MD |
559 | if (lttng_is_setuid_setgid()) { |
560 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
561 | "-f, --config"); | |
562 | } else { | |
3a9e5d16 | 563 | free(config_path); |
e8fa9fb0 MD |
564 | config_path = utils_expand_path(optarg); |
565 | if (!config_path) { | |
566 | ERR("Failed to resolve path: %s", optarg); | |
567 | } | |
cd60b05a JG |
568 | } |
569 | } | |
570 | ||
571 | ret = config_get_section_entries(config_path, config_section_name, | |
572 | config_entry_handler, NULL); | |
573 | if (ret) { | |
574 | if (ret > 0) { | |
575 | ERR("Invalid configuration option at line %i", ret); | |
cd60b05a | 576 | } |
178a0557 | 577 | retval = -1; |
cd60b05a JG |
578 | goto exit; |
579 | } | |
b8aa1682 | 580 | |
cd60b05a JG |
581 | /* Reset getopt's global state */ |
582 | optopt = orig_optopt; | |
583 | optind = orig_optind; | |
b8aa1682 | 584 | while (1) { |
cd60b05a | 585 | c = getopt_long(argc, argv, optstring, long_options, &option_index); |
b8aa1682 JD |
586 | if (c == -1) { |
587 | break; | |
588 | } | |
589 | ||
cd60b05a JG |
590 | ret = set_option(c, optarg, long_options[option_index].name); |
591 | if (ret < 0) { | |
178a0557 | 592 | retval = -1; |
b8aa1682 JD |
593 | goto exit; |
594 | } | |
595 | } | |
596 | ||
597 | /* assign default values */ | |
598 | if (control_uri == NULL) { | |
fa91dc52 MD |
599 | ret = asprintf(&default_address, |
600 | "tcp://" DEFAULT_NETWORK_CONTROL_BIND_ADDRESS ":%d", | |
601 | DEFAULT_NETWORK_CONTROL_PORT); | |
b8aa1682 JD |
602 | if (ret < 0) { |
603 | PERROR("asprintf default data address"); | |
178a0557 | 604 | retval = -1; |
b8aa1682 JD |
605 | goto exit; |
606 | } | |
607 | ||
608 | ret = uri_parse(default_address, &control_uri); | |
609 | free(default_address); | |
610 | if (ret < 0) { | |
611 | ERR("Invalid control URI specified"); | |
178a0557 | 612 | retval = -1; |
b8aa1682 JD |
613 | goto exit; |
614 | } | |
615 | } | |
616 | if (data_uri == NULL) { | |
fa91dc52 MD |
617 | ret = asprintf(&default_address, |
618 | "tcp://" DEFAULT_NETWORK_DATA_BIND_ADDRESS ":%d", | |
619 | DEFAULT_NETWORK_DATA_PORT); | |
b8aa1682 JD |
620 | if (ret < 0) { |
621 | PERROR("asprintf default data address"); | |
178a0557 | 622 | retval = -1; |
b8aa1682 JD |
623 | goto exit; |
624 | } | |
625 | ||
626 | ret = uri_parse(default_address, &data_uri); | |
627 | free(default_address); | |
628 | if (ret < 0) { | |
629 | ERR("Invalid data URI specified"); | |
178a0557 | 630 | retval = -1; |
b8aa1682 JD |
631 | goto exit; |
632 | } | |
633 | } | |
d3e2ba59 | 634 | if (live_uri == NULL) { |
fa91dc52 MD |
635 | ret = asprintf(&default_address, |
636 | "tcp://" DEFAULT_NETWORK_VIEWER_BIND_ADDRESS ":%d", | |
637 | DEFAULT_NETWORK_VIEWER_PORT); | |
d3e2ba59 JD |
638 | if (ret < 0) { |
639 | PERROR("asprintf default viewer control address"); | |
178a0557 | 640 | retval = -1; |
d3e2ba59 JD |
641 | goto exit; |
642 | } | |
643 | ||
644 | ret = uri_parse(default_address, &live_uri); | |
645 | free(default_address); | |
646 | if (ret < 0) { | |
647 | ERR("Invalid viewer control URI specified"); | |
178a0557 | 648 | retval = -1; |
d3e2ba59 JD |
649 | goto exit; |
650 | } | |
651 | } | |
5c0551f9 JG |
652 | ret = set_fd_pool_size(); |
653 | if (ret) { | |
654 | retval = -1; | |
655 | goto exit; | |
896010e3 | 656 | } |
b8aa1682 | 657 | |
a8b66566 JR |
658 | if (opt_group_output_by == RELAYD_GROUP_OUTPUT_BY_UNKNOWN) { |
659 | opt_group_output_by = RELAYD_GROUP_OUTPUT_BY_HOST; | |
660 | } | |
35ab25e5 MD |
661 | if (opt_allow_clear) { |
662 | /* Check if env variable exists. */ | |
663 | const char *value = lttng_secure_getenv(DEFAULT_LTTNG_RELAYD_DISALLOW_CLEAR_ENV); | |
664 | if (value) { | |
665 | ret = config_parse_value(value); | |
666 | if (ret < 0) { | |
667 | ERR("Invalid value for %s specified", DEFAULT_LTTNG_RELAYD_DISALLOW_CLEAR_ENV); | |
668 | retval = -1; | |
669 | goto exit; | |
670 | } | |
671 | opt_allow_clear = !ret; | |
672 | } | |
673 | } | |
a8b66566 | 674 | |
3e38c8b3 JR |
675 | if (opt_allow_ctf2) { |
676 | /* Check if env variable exists. */ | |
677 | const char *value = lttng_secure_getenv(DEFAULT_LTTNG_RELAYD_DISALLOW_CTF2_ENV); | |
678 | if (value) { | |
679 | ret = config_parse_value(value); | |
680 | if (ret < 0) { | |
681 | ERR("Invalid value for %s specified", | |
682 | DEFAULT_LTTNG_RELAYD_DISALLOW_CTF2_ENV); | |
683 | retval = -1; | |
684 | goto exit; | |
685 | } | |
686 | opt_allow_ctf2 = !ret; | |
687 | } | |
688 | } | |
689 | ||
b8aa1682 | 690 | exit: |
3a9e5d16 | 691 | free(config_path); |
cd60b05a | 692 | free(optstring); |
178a0557 | 693 | return retval; |
b8aa1682 JD |
694 | } |
695 | ||
7591bab1 MD |
696 | static void print_global_objects(void) |
697 | { | |
7591bab1 MD |
698 | print_viewer_streams(); |
699 | print_relay_streams(); | |
700 | print_sessions(); | |
7591bab1 MD |
701 | } |
702 | ||
f46376a1 MJ |
703 | static int noop_close(void *data __attribute__((unused)), |
704 | int *fds __attribute__((unused))) | |
5c0551f9 JG |
705 | { |
706 | return 0; | |
707 | } | |
708 | ||
709 | static void untrack_stdio(void) | |
710 | { | |
711 | int fds[] = { fileno(stdout), fileno(stderr) }; | |
712 | ||
713 | /* | |
714 | * noop_close is used since we don't really want to close | |
715 | * the stdio output fds; we merely want to stop tracking them. | |
716 | */ | |
717 | (void) fd_tracker_close_unsuspendable_fd(the_fd_tracker, | |
718 | fds, 2, noop_close, NULL); | |
719 | } | |
720 | ||
b8aa1682 JD |
721 | /* |
722 | * Cleanup the daemon | |
723 | */ | |
7591bab1 | 724 | static void relayd_cleanup(void) |
b8aa1682 | 725 | { |
7591bab1 MD |
726 | print_global_objects(); |
727 | ||
b8aa1682 JD |
728 | DBG("Cleaning up"); |
729 | ||
178a0557 MD |
730 | if (viewer_streams_ht) |
731 | lttng_ht_destroy(viewer_streams_ht); | |
732 | if (relay_streams_ht) | |
733 | lttng_ht_destroy(relay_streams_ht); | |
7591bab1 MD |
734 | if (sessions_ht) |
735 | lttng_ht_destroy(sessions_ht); | |
178a0557 | 736 | |
095a4ae5 | 737 | free(opt_output_path); |
ce9ee1fb | 738 | free(opt_working_directory); |
095a4ae5 | 739 | |
794e2e5f JG |
740 | if (health_relayd) { |
741 | health_app_destroy(health_relayd); | |
742 | } | |
a02de639 | 743 | /* Close thread quit pipes */ |
bcee2b96 JG |
744 | if (health_quit_pipe[0] != -1) { |
745 | (void) fd_tracker_util_pipe_close( | |
746 | the_fd_tracker, health_quit_pipe); | |
747 | } | |
67609994 JG |
748 | if (thread_quit_pipe[0] != -1) { |
749 | (void) fd_tracker_util_pipe_close( | |
750 | the_fd_tracker, thread_quit_pipe); | |
751 | } | |
794e2e5f JG |
752 | if (sessiond_trace_chunk_registry) { |
753 | sessiond_trace_chunk_registry_destroy( | |
754 | sessiond_trace_chunk_registry); | |
755 | } | |
00e3b7f1 | 756 | if (the_fd_tracker) { |
9c256b01 JG |
757 | untrack_stdio(); |
758 | /* | |
759 | * fd_tracker_destroy() will log the contents of the fd-tracker | |
760 | * if a leak is detected. | |
761 | */ | |
00e3b7f1 JG |
762 | fd_tracker_destroy(the_fd_tracker); |
763 | } | |
794e2e5f | 764 | |
710c1f73 DG |
765 | uri_free(control_uri); |
766 | uri_free(data_uri); | |
8d5c808e | 767 | /* Live URI is freed in the live thread. */ |
cd60b05a JG |
768 | |
769 | if (tracing_group_name_override) { | |
770 | free((void *) tracing_group_name); | |
771 | } | |
b8aa1682 JD |
772 | } |
773 | ||
774 | /* | |
775 | * Write to writable pipe used to notify a thread. | |
776 | */ | |
7591bab1 | 777 | static int notify_thread_pipe(int wpipe) |
b8aa1682 | 778 | { |
6cd525e8 | 779 | ssize_t ret; |
b8aa1682 | 780 | |
6cd525e8 MD |
781 | ret = lttng_write(wpipe, "!", 1); |
782 | if (ret < 1) { | |
b8aa1682 | 783 | PERROR("write poll pipe"); |
b4aacfdc | 784 | goto end; |
b8aa1682 | 785 | } |
b4aacfdc MD |
786 | ret = 0; |
787 | end: | |
b8aa1682 JD |
788 | return ret; |
789 | } | |
790 | ||
7591bab1 | 791 | static int notify_health_quit_pipe(int *pipe) |
65931c8b | 792 | { |
6cd525e8 | 793 | ssize_t ret; |
65931c8b | 794 | |
6cd525e8 MD |
795 | ret = lttng_write(pipe[1], "4", 1); |
796 | if (ret < 1) { | |
65931c8b | 797 | PERROR("write relay health quit"); |
b4aacfdc | 798 | goto end; |
65931c8b | 799 | } |
b4aacfdc MD |
800 | ret = 0; |
801 | end: | |
802 | return ret; | |
65931c8b MD |
803 | } |
804 | ||
b8aa1682 | 805 | /* |
b4aacfdc | 806 | * Stop all relayd and relayd-live threads. |
b8aa1682 | 807 | */ |
b4aacfdc | 808 | int lttng_relay_stop_threads(void) |
b8aa1682 | 809 | { |
b4aacfdc | 810 | int retval = 0; |
b8aa1682 JD |
811 | |
812 | /* Stopping all threads */ | |
813 | DBG("Terminating all threads"); | |
b4aacfdc | 814 | if (notify_thread_pipe(thread_quit_pipe[1])) { |
b8aa1682 | 815 | ERR("write error on thread quit pipe"); |
b4aacfdc | 816 | retval = -1; |
b8aa1682 JD |
817 | } |
818 | ||
b4aacfdc MD |
819 | if (notify_health_quit_pipe(health_quit_pipe)) { |
820 | ERR("write error on health quit pipe"); | |
821 | } | |
65931c8b | 822 | |
b8aa1682 | 823 | /* Dispatch thread */ |
26c9d55e | 824 | CMM_STORE_SHARED(dispatch_thread_exit, 1); |
58eb9381 | 825 | futex_nto1_wake(&relay_conn_queue.futex); |
178a0557 | 826 | |
b4aacfdc | 827 | if (relayd_live_stop()) { |
178a0557 | 828 | ERR("Error stopping live threads"); |
b4aacfdc | 829 | retval = -1; |
178a0557 | 830 | } |
b4aacfdc | 831 | return retval; |
b8aa1682 JD |
832 | } |
833 | ||
834 | /* | |
835 | * Signal handler for the daemon | |
836 | * | |
837 | * Simply stop all worker threads, leaving main() return gracefully after | |
838 | * joining all threads and calling cleanup(). | |
839 | */ | |
7591bab1 | 840 | static void sighandler(int sig) |
b8aa1682 JD |
841 | { |
842 | switch (sig) { | |
b8aa1682 JD |
843 | case SIGINT: |
844 | DBG("SIGINT caught"); | |
b4aacfdc MD |
845 | if (lttng_relay_stop_threads()) { |
846 | ERR("Error stopping threads"); | |
847 | } | |
b8aa1682 JD |
848 | break; |
849 | case SIGTERM: | |
850 | DBG("SIGTERM caught"); | |
b4aacfdc MD |
851 | if (lttng_relay_stop_threads()) { |
852 | ERR("Error stopping threads"); | |
853 | } | |
b8aa1682 | 854 | break; |
3fd27398 MD |
855 | case SIGUSR1: |
856 | CMM_STORE_SHARED(recv_child_signal, 1); | |
857 | break; | |
b8aa1682 JD |
858 | default: |
859 | break; | |
860 | } | |
861 | } | |
862 | ||
863 | /* | |
864 | * Setup signal handler for : | |
865 | * SIGINT, SIGTERM, SIGPIPE | |
866 | */ | |
7591bab1 | 867 | static int set_signal_handler(void) |
b8aa1682 JD |
868 | { |
869 | int ret = 0; | |
870 | struct sigaction sa; | |
871 | sigset_t sigset; | |
872 | ||
873 | if ((ret = sigemptyset(&sigset)) < 0) { | |
874 | PERROR("sigemptyset"); | |
875 | return ret; | |
876 | } | |
877 | ||
b8aa1682 JD |
878 | sa.sa_mask = sigset; |
879 | sa.sa_flags = 0; | |
0072e5e2 MD |
880 | |
881 | sa.sa_handler = sighandler; | |
b8aa1682 JD |
882 | if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) { |
883 | PERROR("sigaction"); | |
884 | return ret; | |
885 | } | |
886 | ||
887 | if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) { | |
888 | PERROR("sigaction"); | |
889 | return ret; | |
890 | } | |
891 | ||
0072e5e2 | 892 | if ((ret = sigaction(SIGUSR1, &sa, NULL)) < 0) { |
b8aa1682 JD |
893 | PERROR("sigaction"); |
894 | return ret; | |
895 | } | |
896 | ||
0072e5e2 MD |
897 | sa.sa_handler = SIG_IGN; |
898 | if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) { | |
3fd27398 MD |
899 | PERROR("sigaction"); |
900 | return ret; | |
901 | } | |
902 | ||
903 | DBG("Signal handler set for SIGTERM, SIGUSR1, SIGPIPE and SIGINT"); | |
b8aa1682 JD |
904 | |
905 | return ret; | |
906 | } | |
907 | ||
3fd27398 MD |
908 | void lttng_relay_notify_ready(void) |
909 | { | |
910 | /* Notify the parent of the fork() process that we are ready. */ | |
911 | if (opt_daemon || opt_background) { | |
912 | if (uatomic_sub_return(<tng_relay_ready, 1) == 0) { | |
913 | kill(child_ppid, SIGUSR1); | |
914 | } | |
915 | } | |
916 | } | |
917 | ||
b8aa1682 JD |
918 | /* |
919 | * Init thread quit pipe. | |
920 | * | |
921 | * Return -1 on error or 0 if all pipes are created. | |
922 | */ | |
7591bab1 | 923 | static int init_thread_quit_pipe(void) |
b8aa1682 | 924 | { |
67609994 JG |
925 | return fd_tracker_util_pipe_open_cloexec( |
926 | the_fd_tracker, "Quit pipe", thread_quit_pipe); | |
b8aa1682 JD |
927 | } |
928 | ||
bcee2b96 JG |
929 | /* |
930 | * Init health quit pipe. | |
931 | * | |
932 | * Return -1 on error or 0 if all pipes are created. | |
933 | */ | |
934 | static int init_health_quit_pipe(void) | |
935 | { | |
936 | return fd_tracker_util_pipe_open_cloexec(the_fd_tracker, | |
937 | "Health quit pipe", health_quit_pipe); | |
938 | } | |
939 | ||
b8aa1682 JD |
940 | /* |
941 | * Create a poll set with O_CLOEXEC and add the thread quit pipe to the set. | |
942 | */ | |
e32a0864 JG |
943 | static int create_named_thread_poll_set(struct lttng_poll_event *events, |
944 | int size, const char *name) | |
b8aa1682 JD |
945 | { |
946 | int ret; | |
947 | ||
948 | if (events == NULL || size == 0) { | |
949 | ret = -1; | |
950 | goto error; | |
951 | } | |
952 | ||
e32a0864 | 953 | ret = fd_tracker_util_poll_create(the_fd_tracker, |
f118099a | 954 | name, events, 1, LTTNG_CLOEXEC); |
64e2c0ed JG |
955 | if (ret) { |
956 | PERROR("Failed to create \"%s\" poll file descriptor", name); | |
957 | goto error; | |
958 | } | |
b8aa1682 JD |
959 | |
960 | /* Add quit pipe */ | |
c7759e6a | 961 | ret = lttng_poll_add(events, thread_quit_pipe[0], LPOLLIN | LPOLLERR); |
b8aa1682 JD |
962 | if (ret < 0) { |
963 | goto error; | |
964 | } | |
965 | ||
966 | return 0; | |
967 | ||
968 | error: | |
969 | return ret; | |
970 | } | |
971 | ||
972 | /* | |
973 | * Check if the thread quit pipe was triggered. | |
974 | * | |
975 | * Return 1 if it was triggered else 0; | |
976 | */ | |
7591bab1 | 977 | static int check_thread_quit_pipe(int fd, uint32_t events) |
b8aa1682 JD |
978 | { |
979 | if (fd == thread_quit_pipe[0] && (events & LPOLLIN)) { | |
980 | return 1; | |
981 | } | |
982 | ||
983 | return 0; | |
984 | } | |
985 | ||
40212d87 JG |
986 | static int create_sock(void *data, int *out_fd) |
987 | { | |
988 | int ret; | |
ac497a37 | 989 | struct lttcomm_sock *sock = (lttcomm_sock *) data; |
40212d87 JG |
990 | |
991 | ret = lttcomm_create_sock(sock); | |
992 | if (ret < 0) { | |
993 | goto end; | |
994 | } | |
995 | ||
996 | *out_fd = sock->fd; | |
997 | end: | |
998 | return ret; | |
999 | } | |
1000 | ||
f46376a1 | 1001 | static int close_sock(void *data, int *in_fd __attribute__((unused))) |
40212d87 | 1002 | { |
ac497a37 | 1003 | struct lttcomm_sock *sock = (lttcomm_sock *) data; |
40212d87 JG |
1004 | |
1005 | return sock->ops->close(sock); | |
1006 | } | |
1007 | ||
f355467e JG |
1008 | static int accept_sock(void *data, int *out_fd) |
1009 | { | |
1010 | int ret = 0; | |
1011 | /* Socks is an array of in_sock, out_sock. */ | |
ac497a37 | 1012 | struct lttcomm_sock **socks = (lttcomm_sock **) data; |
f355467e JG |
1013 | struct lttcomm_sock *in_sock = socks[0]; |
1014 | ||
f118099a | 1015 | socks[1] = in_sock->ops->accept(in_sock); |
f355467e JG |
1016 | if (!socks[1]) { |
1017 | ret = -1; | |
1018 | goto end; | |
1019 | } | |
1020 | *out_fd = socks[1]->fd; | |
1021 | end: | |
1022 | return ret; | |
1023 | } | |
1024 | ||
b8aa1682 JD |
1025 | /* |
1026 | * Create and init socket from uri. | |
1027 | */ | |
40212d87 JG |
1028 | static struct lttcomm_sock *relay_socket_create(struct lttng_uri *uri, |
1029 | const char *name) | |
b8aa1682 | 1030 | { |
40212d87 | 1031 | int ret, sock_fd; |
b8aa1682 | 1032 | struct lttcomm_sock *sock = NULL; |
40212d87 JG |
1033 | char uri_str[PATH_MAX]; |
1034 | char *formated_name = NULL; | |
b8aa1682 JD |
1035 | |
1036 | sock = lttcomm_alloc_sock_from_uri(uri); | |
1037 | if (sock == NULL) { | |
1038 | ERR("Allocating socket"); | |
1039 | goto error; | |
1040 | } | |
1041 | ||
40212d87 JG |
1042 | /* |
1043 | * Don't fail to create the socket if the name can't be built as it is | |
1044 | * only used for debugging purposes. | |
1045 | */ | |
1046 | ret = uri_to_str_url(uri, uri_str, sizeof(uri_str)); | |
1047 | uri_str[sizeof(uri_str) - 1] = '\0'; | |
1048 | if (ret >= 0) { | |
1049 | ret = asprintf(&formated_name, "%s socket @ %s", name, | |
1050 | uri_str); | |
1051 | if (ret < 0) { | |
1052 | formated_name = NULL; | |
1053 | } | |
b8aa1682 | 1054 | } |
40212d87 JG |
1055 | |
1056 | ret = fd_tracker_open_unsuspendable_fd(the_fd_tracker, &sock_fd, | |
1057 | (const char **) (formated_name ? &formated_name : NULL), | |
1058 | 1, create_sock, sock); | |
6016eb62 JG |
1059 | if (ret) { |
1060 | PERROR("Failed to open \"%s\" relay socket", | |
1061 | formated_name ?: "Unknown"); | |
1062 | goto error; | |
1063 | } | |
40212d87 | 1064 | DBG("Listening on %s socket %d", name, sock->fd); |
b8aa1682 JD |
1065 | |
1066 | ret = sock->ops->bind(sock); | |
1067 | if (ret < 0) { | |
2288467f | 1068 | PERROR("Failed to bind socket"); |
b8aa1682 JD |
1069 | goto error; |
1070 | } | |
1071 | ||
1072 | ret = sock->ops->listen(sock, -1); | |
1073 | if (ret < 0) { | |
1074 | goto error; | |
1075 | ||
1076 | } | |
1077 | ||
6016eb62 | 1078 | free(formated_name); |
b8aa1682 JD |
1079 | return sock; |
1080 | ||
1081 | error: | |
1082 | if (sock) { | |
1083 | lttcomm_destroy_sock(sock); | |
1084 | } | |
6016eb62 | 1085 | free(formated_name); |
b8aa1682 JD |
1086 | return NULL; |
1087 | } | |
1088 | ||
f355467e JG |
1089 | static |
1090 | struct lttcomm_sock *accept_relayd_sock(struct lttcomm_sock *listening_sock, | |
1091 | const char *name) | |
1092 | { | |
1093 | int out_fd, ret; | |
1094 | struct lttcomm_sock *socks[2] = { listening_sock, NULL }; | |
1095 | struct lttcomm_sock *new_sock = NULL; | |
1096 | ||
f118099a | 1097 | ret = fd_tracker_open_unsuspendable_fd( |
f355467e JG |
1098 | the_fd_tracker, &out_fd, |
1099 | (const char **) &name, | |
1100 | 1, accept_sock, &socks); | |
1101 | if (ret) { | |
1102 | goto end; | |
1103 | } | |
1104 | new_sock = socks[1]; | |
1105 | DBG("%s accepted, socket %d", name, new_sock->fd); | |
1106 | end: | |
1107 | return new_sock; | |
1108 | } | |
1109 | ||
b8aa1682 JD |
1110 | /* |
1111 | * This thread manages the listening for new connections on the network | |
1112 | */ | |
f46376a1 | 1113 | static void *relay_thread_listener(void *data __attribute__((unused))) |
b8aa1682 | 1114 | { |
095a4ae5 | 1115 | int i, ret, pollfd, err = -1; |
b8aa1682 JD |
1116 | uint32_t revents, nb_fd; |
1117 | struct lttng_poll_event events; | |
1118 | struct lttcomm_sock *control_sock, *data_sock; | |
1119 | ||
b8aa1682 JD |
1120 | DBG("[thread] Relay listener started"); |
1121 | ||
8fba2b8d | 1122 | rcu_register_thread(); |
55706a7d MD |
1123 | health_register(health_relayd, HEALTH_RELAYD_TYPE_LISTENER); |
1124 | ||
f385ae0a MD |
1125 | health_code_update(); |
1126 | ||
40212d87 | 1127 | control_sock = relay_socket_create(control_uri, "Control listener"); |
b8aa1682 | 1128 | if (!control_sock) { |
095a4ae5 | 1129 | goto error_sock_control; |
b8aa1682 JD |
1130 | } |
1131 | ||
40212d87 | 1132 | data_sock = relay_socket_create(data_uri, "Data listener"); |
b8aa1682 | 1133 | if (!data_sock) { |
095a4ae5 | 1134 | goto error_sock_relay; |
b8aa1682 JD |
1135 | } |
1136 | ||
1137 | /* | |
7591bab1 MD |
1138 | * Pass 3 as size here for the thread quit pipe, control and |
1139 | * data socket. | |
b8aa1682 | 1140 | */ |
ba9cf8e1 | 1141 | ret = create_named_thread_poll_set(&events, 3, "Listener thread epoll"); |
b8aa1682 JD |
1142 | if (ret < 0) { |
1143 | goto error_create_poll; | |
1144 | } | |
1145 | ||
1146 | /* Add the control socket */ | |
1147 | ret = lttng_poll_add(&events, control_sock->fd, LPOLLIN | LPOLLRDHUP); | |
1148 | if (ret < 0) { | |
1149 | goto error_poll_add; | |
1150 | } | |
1151 | ||
1152 | /* Add the data socket */ | |
1153 | ret = lttng_poll_add(&events, data_sock->fd, LPOLLIN | LPOLLRDHUP); | |
1154 | if (ret < 0) { | |
1155 | goto error_poll_add; | |
1156 | } | |
1157 | ||
3fd27398 MD |
1158 | lttng_relay_notify_ready(); |
1159 | ||
9b5e0863 MD |
1160 | if (testpoint(relayd_thread_listener)) { |
1161 | goto error_testpoint; | |
1162 | } | |
1163 | ||
b8aa1682 | 1164 | while (1) { |
f385ae0a MD |
1165 | health_code_update(); |
1166 | ||
b8aa1682 JD |
1167 | DBG("Listener accepting connections"); |
1168 | ||
b8aa1682 | 1169 | restart: |
f385ae0a | 1170 | health_poll_entry(); |
b8aa1682 | 1171 | ret = lttng_poll_wait(&events, -1); |
f385ae0a | 1172 | health_poll_exit(); |
b8aa1682 JD |
1173 | if (ret < 0) { |
1174 | /* | |
1175 | * Restart interrupted system call. | |
1176 | */ | |
1177 | if (errno == EINTR) { | |
1178 | goto restart; | |
1179 | } | |
1180 | goto error; | |
1181 | } | |
1182 | ||
0d9c5d77 DG |
1183 | nb_fd = ret; |
1184 | ||
b8aa1682 JD |
1185 | DBG("Relay new connection received"); |
1186 | for (i = 0; i < nb_fd; i++) { | |
f385ae0a MD |
1187 | health_code_update(); |
1188 | ||
b8aa1682 JD |
1189 | /* Fetch once the poll data */ |
1190 | revents = LTTNG_POLL_GETEV(&events, i); | |
1191 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1192 | ||
1193 | /* Thread quit pipe has been closed. Killing thread. */ | |
1194 | ret = check_thread_quit_pipe(pollfd, revents); | |
1195 | if (ret) { | |
095a4ae5 MD |
1196 | err = 0; |
1197 | goto exit; | |
b8aa1682 JD |
1198 | } |
1199 | ||
03e43155 | 1200 | if (revents & LPOLLIN) { |
4b7f17b2 | 1201 | /* |
7591bab1 MD |
1202 | * A new connection is requested, therefore a |
1203 | * sessiond/consumerd connection is allocated in | |
1204 | * this thread, enqueued to a global queue and | |
1205 | * dequeued (and freed) in the worker thread. | |
4b7f17b2 | 1206 | */ |
58eb9381 DG |
1207 | int val = 1; |
1208 | struct relay_connection *new_conn; | |
f355467e | 1209 | struct lttcomm_sock *newsock = NULL; |
7591bab1 | 1210 | enum connection_type type; |
b8aa1682 JD |
1211 | |
1212 | if (pollfd == data_sock->fd) { | |
7591bab1 | 1213 | type = RELAY_DATA; |
f355467e JG |
1214 | newsock = accept_relayd_sock(data_sock, |
1215 | "Data socket to relayd"); | |
4b7f17b2 | 1216 | } else { |
a0377dfe | 1217 | LTTNG_ASSERT(pollfd == control_sock->fd); |
7591bab1 | 1218 | type = RELAY_CONTROL; |
875e3164 JG |
1219 | newsock = accept_relayd_sock(control_sock, |
1220 | "Control socket to relayd"); | |
b8aa1682 | 1221 | } |
58eb9381 DG |
1222 | if (!newsock) { |
1223 | PERROR("accepting sock"); | |
58eb9381 DG |
1224 | goto error; |
1225 | } | |
1226 | ||
1227 | ret = setsockopt(newsock->fd, SOL_SOCKET, SO_REUSEADDR, &val, | |
1228 | sizeof(val)); | |
b8aa1682 JD |
1229 | if (ret < 0) { |
1230 | PERROR("setsockopt inet"); | |
4b7f17b2 | 1231 | lttcomm_destroy_sock(newsock); |
b8aa1682 JD |
1232 | goto error; |
1233 | } | |
f056029c JR |
1234 | |
1235 | ret = socket_apply_keep_alive_config(newsock->fd); | |
1236 | if (ret < 0) { | |
1237 | ERR("Failed to apply TCP keep-alive configuration on socket (%i)", | |
1238 | newsock->fd); | |
1239 | lttcomm_destroy_sock(newsock); | |
1240 | goto error; | |
1241 | } | |
1242 | ||
7591bab1 MD |
1243 | new_conn = connection_create(newsock, type); |
1244 | if (!new_conn) { | |
1245 | lttcomm_destroy_sock(newsock); | |
1246 | goto error; | |
1247 | } | |
58eb9381 DG |
1248 | |
1249 | /* Enqueue request for the dispatcher thread. */ | |
ac497a37 SM |
1250 | cds_wfcq_head_ptr_t head; |
1251 | head.h = &relay_conn_queue.head; | |
1252 | cds_wfcq_enqueue(head, &relay_conn_queue.tail, | |
8bdee6e2 | 1253 | &new_conn->qnode); |
b8aa1682 JD |
1254 | |
1255 | /* | |
7591bab1 MD |
1256 | * Wake the dispatch queue futex. |
1257 | * Implicit memory barrier with the | |
1258 | * exchange in cds_wfcq_enqueue. | |
b8aa1682 | 1259 | */ |
58eb9381 | 1260 | futex_nto1_wake(&relay_conn_queue.futex); |
03e43155 MD |
1261 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
1262 | ERR("socket poll error"); | |
1263 | goto error; | |
1264 | } else { | |
1265 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
1266 | goto error; | |
b8aa1682 JD |
1267 | } |
1268 | } | |
1269 | } | |
1270 | ||
095a4ae5 | 1271 | exit: |
b8aa1682 JD |
1272 | error: |
1273 | error_poll_add: | |
9b5e0863 | 1274 | error_testpoint: |
ba9cf8e1 | 1275 | (void) fd_tracker_util_poll_clean(the_fd_tracker, &events); |
b8aa1682 | 1276 | error_create_poll: |
095a4ae5 | 1277 | if (data_sock->fd >= 0) { |
40212d87 JG |
1278 | int data_sock_fd = data_sock->fd; |
1279 | ||
1280 | ret = fd_tracker_close_unsuspendable_fd(the_fd_tracker, | |
1281 | &data_sock_fd, 1, close_sock, | |
1282 | data_sock); | |
b8aa1682 | 1283 | if (ret) { |
40212d87 | 1284 | PERROR("Failed to close the data listener socket file descriptor"); |
b8aa1682 | 1285 | } |
40212d87 | 1286 | data_sock->fd = -1; |
b8aa1682 | 1287 | } |
095a4ae5 MD |
1288 | lttcomm_destroy_sock(data_sock); |
1289 | error_sock_relay: | |
1290 | if (control_sock->fd >= 0) { | |
40212d87 JG |
1291 | int control_sock_fd = control_sock->fd; |
1292 | ||
1293 | ret = fd_tracker_close_unsuspendable_fd(the_fd_tracker, | |
1294 | &control_sock_fd, 1, close_sock, | |
1295 | control_sock); | |
b8aa1682 | 1296 | if (ret) { |
40212d87 | 1297 | PERROR("Failed to close the control listener socket file descriptor"); |
b8aa1682 | 1298 | } |
40212d87 | 1299 | control_sock->fd = -1; |
b8aa1682 | 1300 | } |
095a4ae5 MD |
1301 | lttcomm_destroy_sock(control_sock); |
1302 | error_sock_control: | |
1303 | if (err) { | |
f385ae0a MD |
1304 | health_error(); |
1305 | ERR("Health error occurred in %s", __func__); | |
095a4ae5 | 1306 | } |
55706a7d | 1307 | health_unregister(health_relayd); |
8fba2b8d | 1308 | rcu_unregister_thread(); |
b8aa1682 | 1309 | DBG("Relay listener thread cleanup complete"); |
b4aacfdc | 1310 | lttng_relay_stop_threads(); |
b8aa1682 JD |
1311 | return NULL; |
1312 | } | |
1313 | ||
1314 | /* | |
1315 | * This thread manages the dispatching of the requests to worker threads | |
1316 | */ | |
f46376a1 | 1317 | static void *relay_thread_dispatcher(void *data __attribute__((unused))) |
b8aa1682 | 1318 | { |
6cd525e8 MD |
1319 | int err = -1; |
1320 | ssize_t ret; | |
8bdee6e2 | 1321 | struct cds_wfcq_node *node; |
58eb9381 | 1322 | struct relay_connection *new_conn = NULL; |
b8aa1682 JD |
1323 | |
1324 | DBG("[thread] Relay dispatcher started"); | |
1325 | ||
55706a7d MD |
1326 | health_register(health_relayd, HEALTH_RELAYD_TYPE_DISPATCHER); |
1327 | ||
9b5e0863 MD |
1328 | if (testpoint(relayd_thread_dispatcher)) { |
1329 | goto error_testpoint; | |
1330 | } | |
1331 | ||
f385ae0a MD |
1332 | health_code_update(); |
1333 | ||
0ed3b1a8 | 1334 | for (;;) { |
f385ae0a MD |
1335 | health_code_update(); |
1336 | ||
b8aa1682 | 1337 | /* Atomically prepare the queue futex */ |
58eb9381 | 1338 | futex_nto1_prepare(&relay_conn_queue.futex); |
b8aa1682 | 1339 | |
0ed3b1a8 MD |
1340 | if (CMM_LOAD_SHARED(dispatch_thread_exit)) { |
1341 | break; | |
1342 | } | |
1343 | ||
b8aa1682 | 1344 | do { |
f385ae0a MD |
1345 | health_code_update(); |
1346 | ||
b8aa1682 | 1347 | /* Dequeue commands */ |
8bdee6e2 SM |
1348 | node = cds_wfcq_dequeue_blocking(&relay_conn_queue.head, |
1349 | &relay_conn_queue.tail); | |
b8aa1682 JD |
1350 | if (node == NULL) { |
1351 | DBG("Woken up but nothing in the relay command queue"); | |
1352 | /* Continue thread execution */ | |
1353 | break; | |
1354 | } | |
0114db0e | 1355 | new_conn = lttng::utils::container_of(node, &relay_connection::qnode); |
b8aa1682 | 1356 | |
58eb9381 | 1357 | DBG("Dispatching request waiting on sock %d", new_conn->sock->fd); |
b8aa1682 JD |
1358 | |
1359 | /* | |
7591bab1 MD |
1360 | * Inform worker thread of the new request. This |
1361 | * call is blocking so we can be assured that | |
1362 | * the data will be read at some point in time | |
1363 | * or wait to the end of the world :) | |
b8aa1682 | 1364 | */ |
58eb9381 DG |
1365 | ret = lttng_write(relay_conn_pipe[1], &new_conn, sizeof(new_conn)); |
1366 | if (ret < 0) { | |
1367 | PERROR("write connection pipe"); | |
7591bab1 | 1368 | connection_put(new_conn); |
b8aa1682 JD |
1369 | goto error; |
1370 | } | |
1371 | } while (node != NULL); | |
1372 | ||
1373 | /* Futex wait on queue. Blocking call on futex() */ | |
f385ae0a | 1374 | health_poll_entry(); |
58eb9381 | 1375 | futex_nto1_wait(&relay_conn_queue.futex); |
f385ae0a | 1376 | health_poll_exit(); |
b8aa1682 JD |
1377 | } |
1378 | ||
f385ae0a MD |
1379 | /* Normal exit, no error */ |
1380 | err = 0; | |
1381 | ||
b8aa1682 | 1382 | error: |
9b5e0863 | 1383 | error_testpoint: |
f385ae0a MD |
1384 | if (err) { |
1385 | health_error(); | |
1386 | ERR("Health error occurred in %s", __func__); | |
1387 | } | |
55706a7d | 1388 | health_unregister(health_relayd); |
b8aa1682 | 1389 | DBG("Dispatch thread dying"); |
b4aacfdc | 1390 | lttng_relay_stop_threads(); |
b8aa1682 JD |
1391 | return NULL; |
1392 | } | |
1393 | ||
298a25ca JG |
1394 | static bool session_streams_have_index(const struct relay_session *session) |
1395 | { | |
1396 | return session->minor >= 4 && !session->snapshot; | |
1397 | } | |
1398 | ||
c5b6f4f0 DG |
1399 | /* |
1400 | * Handle the RELAYD_CREATE_SESSION command. | |
1401 | * | |
1402 | * On success, send back the session id or else return a negative value. | |
1403 | */ | |
f46376a1 MJ |
1404 | static int relay_create_session( |
1405 | const struct lttcomm_relayd_hdr *recv_hdr __attribute__((unused)), | |
5312a3ed JG |
1406 | struct relay_connection *conn, |
1407 | const struct lttng_buffer_view *payload) | |
c5b6f4f0 | 1408 | { |
5312a3ed JG |
1409 | int ret = 0; |
1410 | ssize_t send_ret; | |
4c6885d2 | 1411 | struct relay_session *session = NULL; |
ecd1a12f | 1412 | struct lttcomm_relayd_create_session_reply_2_11 reply = {}; |
1e791a74 JG |
1413 | char session_name[LTTNG_NAME_MAX] = {}; |
1414 | char hostname[LTTNG_HOST_NAME_MAX] = {}; | |
7591bab1 MD |
1415 | uint32_t live_timer = 0; |
1416 | bool snapshot = false; | |
46ef2188 | 1417 | bool session_name_contains_creation_timestamp = false; |
23c8ff50 | 1418 | /* Left nil for peers < 2.11. */ |
6fa5fe7c | 1419 | char base_path[LTTNG_PATH_MAX] = {}; |
23c8ff50 | 1420 | lttng_uuid sessiond_uuid = {}; |
1e791a74 JG |
1421 | LTTNG_OPTIONAL(uint64_t) id_sessiond = {}; |
1422 | LTTNG_OPTIONAL(uint64_t) current_chunk_id = {}; | |
db1da059 | 1423 | LTTNG_OPTIONAL(time_t) creation_time = {}; |
ecd1a12f MD |
1424 | struct lttng_dynamic_buffer reply_payload; |
1425 | ||
1426 | lttng_dynamic_buffer_init(&reply_payload); | |
c5b6f4f0 | 1427 | |
f86f6389 JR |
1428 | if (conn->minor < 4) { |
1429 | /* From 2.1 to 2.3 */ | |
1430 | ret = 0; | |
1431 | } else if (conn->minor >= 4 && conn->minor < 11) { | |
1432 | /* From 2.4 to 2.10 */ | |
5312a3ed | 1433 | ret = cmd_create_session_2_4(payload, session_name, |
7591bab1 | 1434 | hostname, &live_timer, &snapshot); |
f86f6389 | 1435 | } else { |
84fa4db5 | 1436 | bool has_current_chunk; |
db1da059 JG |
1437 | uint64_t current_chunk_id_value; |
1438 | time_t creation_time_value; | |
1439 | uint64_t id_sessiond_value; | |
84fa4db5 | 1440 | |
f86f6389 | 1441 | /* From 2.11 to ... */ |
db1da059 | 1442 | ret = cmd_create_session_2_11(payload, session_name, hostname, |
6fa5fe7c | 1443 | base_path, &live_timer, &snapshot, &id_sessiond_value, |
db1da059 | 1444 | sessiond_uuid, &has_current_chunk, |
46ef2188 MD |
1445 | ¤t_chunk_id_value, &creation_time_value, |
1446 | &session_name_contains_creation_timestamp); | |
23c8ff50 JG |
1447 | if (lttng_uuid_is_nil(sessiond_uuid)) { |
1448 | /* The nil UUID is reserved for pre-2.11 clients. */ | |
1449 | ERR("Illegal nil UUID announced by peer in create session command"); | |
1450 | ret = -1; | |
1451 | goto send_reply; | |
1452 | } | |
db1da059 JG |
1453 | LTTNG_OPTIONAL_SET(&id_sessiond, id_sessiond_value); |
1454 | LTTNG_OPTIONAL_SET(&creation_time, creation_time_value); | |
1455 | if (has_current_chunk) { | |
1456 | LTTNG_OPTIONAL_SET(¤t_chunk_id, | |
1457 | current_chunk_id_value); | |
1458 | } | |
7591bab1 | 1459 | } |
f86f6389 | 1460 | |
7591bab1 MD |
1461 | if (ret < 0) { |
1462 | goto send_reply; | |
d3e2ba59 JD |
1463 | } |
1464 | ||
6fa5fe7c | 1465 | session = session_create(session_name, hostname, base_path, live_timer, |
1e791a74 JG |
1466 | snapshot, sessiond_uuid, |
1467 | id_sessiond.is_set ? &id_sessiond.value : NULL, | |
1468 | current_chunk_id.is_set ? ¤t_chunk_id.value : NULL, | |
db1da059 | 1469 | creation_time.is_set ? &creation_time.value : NULL, |
46ef2188 MD |
1470 | conn->major, conn->minor, |
1471 | session_name_contains_creation_timestamp); | |
7591bab1 MD |
1472 | if (!session) { |
1473 | ret = -1; | |
1474 | goto send_reply; | |
1475 | } | |
a0377dfe | 1476 | LTTNG_ASSERT(!conn->session); |
7591bab1 | 1477 | conn->session = session; |
c5b6f4f0 DG |
1478 | DBG("Created session %" PRIu64, session->id); |
1479 | ||
ecd1a12f | 1480 | reply.generic.session_id = htobe64(session->id); |
7591bab1 MD |
1481 | |
1482 | send_reply: | |
c5b6f4f0 | 1483 | if (ret < 0) { |
ecd1a12f | 1484 | reply.generic.ret_code = htobe32(LTTNG_ERR_FATAL); |
c5b6f4f0 | 1485 | } else { |
ecd1a12f | 1486 | reply.generic.ret_code = htobe32(LTTNG_OK); |
c5b6f4f0 DG |
1487 | } |
1488 | ||
ecd1a12f MD |
1489 | if (conn->minor < 11) { |
1490 | /* From 2.1 to 2.10 */ | |
1491 | ret = lttng_dynamic_buffer_append(&reply_payload, | |
1492 | &reply.generic, sizeof(reply.generic)); | |
1493 | if (ret) { | |
1494 | ERR("Failed to append \"create session\" command reply header to payload buffer"); | |
1495 | ret = -1; | |
1496 | goto end; | |
1497 | } | |
1498 | } else { | |
1499 | const uint32_t output_path_length = | |
8d382dd4 | 1500 | session ? strlen(session->output_path) + 1 : 0; |
ecd1a12f MD |
1501 | |
1502 | reply.output_path_length = htobe32(output_path_length); | |
8d382dd4 JG |
1503 | ret = lttng_dynamic_buffer_append( |
1504 | &reply_payload, &reply, sizeof(reply)); | |
ecd1a12f MD |
1505 | if (ret) { |
1506 | ERR("Failed to append \"create session\" command reply header to payload buffer"); | |
1507 | goto end; | |
1508 | } | |
1509 | ||
8d382dd4 JG |
1510 | if (output_path_length) { |
1511 | ret = lttng_dynamic_buffer_append(&reply_payload, | |
1512 | session->output_path, | |
1513 | output_path_length); | |
1514 | if (ret) { | |
1515 | ERR("Failed to append \"create session\" command reply path to payload buffer"); | |
1516 | goto end; | |
1517 | } | |
ecd1a12f MD |
1518 | } |
1519 | } | |
1520 | ||
1521 | send_ret = conn->sock->ops->sendmsg(conn->sock, reply_payload.data, | |
1522 | reply_payload.size, 0); | |
1523 | if (send_ret < (ssize_t) reply_payload.size) { | |
1524 | ERR("Failed to send \"create session\" command reply of %zu bytes (ret = %zd)", | |
1525 | reply_payload.size, send_ret); | |
5312a3ed | 1526 | ret = -1; |
c5b6f4f0 | 1527 | } |
ecd1a12f | 1528 | end: |
4c6885d2 JG |
1529 | if (ret < 0 && session) { |
1530 | session_put(session); | |
1531 | } | |
ecd1a12f | 1532 | lttng_dynamic_buffer_reset(&reply_payload); |
c5b6f4f0 DG |
1533 | return ret; |
1534 | } | |
1535 | ||
a4baae1b JD |
1536 | /* |
1537 | * When we have received all the streams and the metadata for a channel, | |
1538 | * we make them visible to the viewer threads. | |
1539 | */ | |
7591bab1 | 1540 | static void publish_connection_local_streams(struct relay_connection *conn) |
a4baae1b | 1541 | { |
7591bab1 MD |
1542 | struct relay_stream *stream; |
1543 | struct relay_session *session = conn->session; | |
a4baae1b | 1544 | |
7591bab1 MD |
1545 | /* |
1546 | * We publish all streams belonging to a session atomically wrt | |
1547 | * session lock. | |
1548 | */ | |
1549 | pthread_mutex_lock(&session->lock); | |
1550 | rcu_read_lock(); | |
1551 | cds_list_for_each_entry_rcu(stream, &session->recv_list, | |
1552 | recv_node) { | |
1553 | stream_publish(stream); | |
a4baae1b | 1554 | } |
7591bab1 | 1555 | rcu_read_unlock(); |
a4baae1b | 1556 | |
7591bab1 MD |
1557 | /* |
1558 | * Inform the viewer that there are new streams in the session. | |
1559 | */ | |
1560 | if (session->viewer_attached) { | |
1561 | uatomic_set(&session->new_streams, 1); | |
1562 | } | |
1563 | pthread_mutex_unlock(&session->lock); | |
a4baae1b JD |
1564 | } |
1565 | ||
348a81dc JG |
1566 | static int conform_channel_path(char *channel_path) |
1567 | { | |
1568 | int ret = 0; | |
1569 | ||
1570 | if (strstr("../", channel_path)) { | |
1571 | ERR("Refusing channel path as it walks up the path hierarchy: \"%s\"", | |
1572 | channel_path); | |
1573 | ret = -1; | |
1574 | goto end; | |
1575 | } | |
1576 | ||
1577 | if (*channel_path == '/') { | |
1578 | const size_t len = strlen(channel_path); | |
1579 | ||
1580 | /* | |
1581 | * Channel paths from peers prior to 2.11 are expressed as an | |
1582 | * absolute path that is, in reality, relative to the relay | |
1583 | * daemon's output directory. Remove the leading slash so it | |
1584 | * is correctly interpreted as a relative path later on. | |
1585 | * | |
1586 | * len (and not len - 1) is used to copy the trailing NULL. | |
1587 | */ | |
1588 | bcopy(channel_path + 1, channel_path, len); | |
1589 | } | |
1590 | end: | |
1591 | return ret; | |
1592 | } | |
1593 | ||
b8aa1682 JD |
1594 | /* |
1595 | * relay_add_stream: allocate a new stream for a session | |
1596 | */ | |
f46376a1 MJ |
1597 | static int relay_add_stream( |
1598 | const struct lttcomm_relayd_hdr *recv_hdr __attribute__((unused)), | |
5312a3ed JG |
1599 | struct relay_connection *conn, |
1600 | const struct lttng_buffer_view *payload) | |
b8aa1682 | 1601 | { |
7591bab1 MD |
1602 | int ret; |
1603 | ssize_t send_ret; | |
58eb9381 | 1604 | struct relay_session *session = conn->session; |
b8aa1682 JD |
1605 | struct relay_stream *stream = NULL; |
1606 | struct lttcomm_relayd_status_stream reply; | |
4030a636 | 1607 | struct ctf_trace *trace = NULL; |
7591bab1 MD |
1608 | uint64_t stream_handle = -1ULL; |
1609 | char *path_name = NULL, *channel_name = NULL; | |
1610 | uint64_t tracefile_size = 0, tracefile_count = 0; | |
348a81dc | 1611 | LTTNG_OPTIONAL(uint64_t) stream_chunk_id = {}; |
b8aa1682 | 1612 | |
5312a3ed | 1613 | if (!session || !conn->version_check_done) { |
b8aa1682 JD |
1614 | ERR("Trying to add a stream before version check"); |
1615 | ret = -1; | |
1616 | goto end_no_session; | |
1617 | } | |
1618 | ||
2f21a469 JR |
1619 | if (session->minor == 1) { |
1620 | /* For 2.1 */ | |
5312a3ed | 1621 | ret = cmd_recv_stream_2_1(payload, &path_name, |
7591bab1 | 1622 | &channel_name); |
2f21a469 JR |
1623 | } else if (session->minor > 1 && session->minor < 11) { |
1624 | /* From 2.2 to 2.10 */ | |
5312a3ed | 1625 | ret = cmd_recv_stream_2_2(payload, &path_name, |
7591bab1 | 1626 | &channel_name, &tracefile_size, &tracefile_count); |
2f21a469 JR |
1627 | } else { |
1628 | /* From 2.11 to ... */ | |
1629 | ret = cmd_recv_stream_2_11(payload, &path_name, | |
0b50e4b3 JG |
1630 | &channel_name, &tracefile_size, &tracefile_count, |
1631 | &stream_chunk_id.value); | |
1632 | stream_chunk_id.is_set = true; | |
0f907de1 | 1633 | } |
2f21a469 | 1634 | |
0f907de1 | 1635 | if (ret < 0) { |
7591bab1 | 1636 | goto send_reply; |
b8aa1682 JD |
1637 | } |
1638 | ||
348a81dc JG |
1639 | if (conform_channel_path(path_name)) { |
1640 | goto send_reply; | |
1641 | } | |
1642 | ||
2a635488 JR |
1643 | /* |
1644 | * Backward compatibility for --group-output-by-session. | |
1645 | * Prior to lttng 2.11, the complete path is passed by the stream. | |
1646 | * Starting at 2.11, lttng-relayd uses chunk. When dealing with producer | |
1647 | * >=2.11 the chunk is responsible for the output path. When dealing | |
1648 | * with producer < 2.11 the chunk output_path is the root output path | |
1649 | * and the stream carries the complete path (path_name). | |
1650 | * To support --group-output-by-session with older producer (<2.11), we | |
1651 | * need to craft the path based on the stream path. | |
1652 | */ | |
1653 | if (opt_group_output_by == RELAYD_GROUP_OUTPUT_BY_SESSION) { | |
1654 | if (conn->minor < 4) { | |
1655 | /* | |
1656 | * From 2.1 to 2.3, the session_name is not passed on | |
1657 | * the RELAYD_CREATE_SESSION command. The session name | |
1658 | * is necessary to detect the presence of a base_path | |
1659 | * inside the stream path. Without it we cannot perform | |
1660 | * a valid group-output-by-session transformation. | |
1661 | */ | |
1662 | WARN("Unable to perform a --group-by-session transformation for session %" PRIu64 | |
1663 | " for stream with path \"%s\" as it is produced by a peer using a protocol older than v2.4", | |
1664 | session->id, path_name); | |
1665 | } else if (conn->minor >= 4 && conn->minor < 11) { | |
1666 | char *group_by_session_path_name; | |
1667 | ||
a0377dfe | 1668 | LTTNG_ASSERT(session->session_name[0] != '\0'); |
2a635488 JR |
1669 | |
1670 | group_by_session_path_name = | |
1671 | backward_compat_group_by_session( | |
1672 | path_name, | |
d2cb4a90 JG |
1673 | session->session_name, |
1674 | session->creation_time.value); | |
2a635488 JR |
1675 | if (!group_by_session_path_name) { |
1676 | ERR("Failed to apply group by session to stream of session %" PRIu64, | |
1677 | session->id); | |
1678 | goto send_reply; | |
1679 | } | |
1680 | ||
1681 | DBG("Transformed session path from \"%s\" to \"%s\" to honor per-session name grouping", | |
1682 | path_name, group_by_session_path_name); | |
1683 | ||
1684 | free(path_name); | |
1685 | path_name = group_by_session_path_name; | |
1686 | } | |
1687 | } | |
1688 | ||
7591bab1 | 1689 | trace = ctf_trace_get_by_path_or_create(session, path_name); |
2a174661 | 1690 | if (!trace) { |
7591bab1 | 1691 | goto send_reply; |
2a174661 | 1692 | } |
2a174661 | 1693 | |
2a635488 | 1694 | /* This stream here has one reference on the trace. */ |
7591bab1 MD |
1695 | pthread_mutex_lock(&last_relay_stream_id_lock); |
1696 | stream_handle = ++last_relay_stream_id; | |
1697 | pthread_mutex_unlock(&last_relay_stream_id_lock); | |
d3e2ba59 | 1698 | |
7591bab1 MD |
1699 | /* We pass ownership of path_name and channel_name. */ |
1700 | stream = stream_create(trace, stream_handle, path_name, | |
348a81dc | 1701 | channel_name, tracefile_size, tracefile_count); |
7591bab1 MD |
1702 | path_name = NULL; |
1703 | channel_name = NULL; | |
a4baae1b | 1704 | |
2a174661 | 1705 | /* |
7591bab1 MD |
1706 | * Streams are the owners of their trace. Reference to trace is |
1707 | * kept within stream_create(). | |
2a174661 | 1708 | */ |
7591bab1 | 1709 | ctf_trace_put(trace); |
d3e2ba59 | 1710 | |
7591bab1 | 1711 | send_reply: |
53efb85a | 1712 | memset(&reply, 0, sizeof(reply)); |
7591bab1 MD |
1713 | reply.handle = htobe64(stream_handle); |
1714 | if (!stream) { | |
f73fabfd | 1715 | reply.ret_code = htobe32(LTTNG_ERR_UNK); |
b8aa1682 | 1716 | } else { |
f73fabfd | 1717 | reply.ret_code = htobe32(LTTNG_OK); |
b8aa1682 | 1718 | } |
5af40280 | 1719 | |
58eb9381 | 1720 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, |
b8aa1682 | 1721 | sizeof(struct lttcomm_relayd_status_stream), 0); |
5312a3ed JG |
1722 | if (send_ret < (ssize_t) sizeof(reply)) { |
1723 | ERR("Failed to send \"add stream\" command reply (ret = %zd)", | |
1724 | send_ret); | |
1725 | ret = -1; | |
b8aa1682 JD |
1726 | } |
1727 | ||
1728 | end_no_session: | |
7591bab1 MD |
1729 | free(path_name); |
1730 | free(channel_name); | |
0f907de1 | 1731 | return ret; |
b8aa1682 JD |
1732 | } |
1733 | ||
173af62f DG |
1734 | /* |
1735 | * relay_close_stream: close a specific stream | |
1736 | */ | |
f46376a1 MJ |
1737 | static int relay_close_stream( |
1738 | const struct lttcomm_relayd_hdr *recv_hdr __attribute__((unused)), | |
5312a3ed JG |
1739 | struct relay_connection *conn, |
1740 | const struct lttng_buffer_view *payload) | |
173af62f | 1741 | { |
5312a3ed JG |
1742 | int ret; |
1743 | ssize_t send_ret; | |
58eb9381 | 1744 | struct relay_session *session = conn->session; |
173af62f DG |
1745 | struct lttcomm_relayd_close_stream stream_info; |
1746 | struct lttcomm_relayd_generic_reply reply; | |
1747 | struct relay_stream *stream; | |
173af62f DG |
1748 | |
1749 | DBG("Close stream received"); | |
1750 | ||
5312a3ed | 1751 | if (!session || !conn->version_check_done) { |
173af62f DG |
1752 | ERR("Trying to close a stream before version check"); |
1753 | ret = -1; | |
1754 | goto end_no_session; | |
1755 | } | |
1756 | ||
5312a3ed JG |
1757 | if (payload->size < sizeof(stream_info)) { |
1758 | ERR("Unexpected payload size in \"relay_close_stream\": expected >= %zu bytes, got %zu bytes", | |
1759 | sizeof(stream_info), payload->size); | |
173af62f DG |
1760 | ret = -1; |
1761 | goto end_no_session; | |
1762 | } | |
5312a3ed JG |
1763 | memcpy(&stream_info, payload->data, sizeof(stream_info)); |
1764 | stream_info.stream_id = be64toh(stream_info.stream_id); | |
1765 | stream_info.last_net_seq_num = be64toh(stream_info.last_net_seq_num); | |
173af62f | 1766 | |
5312a3ed | 1767 | stream = stream_get_by_id(stream_info.stream_id); |
173af62f DG |
1768 | if (!stream) { |
1769 | ret = -1; | |
7591bab1 | 1770 | goto end; |
173af62f | 1771 | } |
77f7bd85 MD |
1772 | |
1773 | /* | |
1774 | * Set last_net_seq_num before the close flag. Required by data | |
1775 | * pending check. | |
1776 | */ | |
7591bab1 | 1777 | pthread_mutex_lock(&stream->lock); |
5312a3ed | 1778 | stream->last_net_seq_num = stream_info.last_net_seq_num; |
77f7bd85 MD |
1779 | pthread_mutex_unlock(&stream->lock); |
1780 | ||
bda7c7b9 JG |
1781 | /* |
1782 | * This is one of the conditions which may trigger a stream close | |
1783 | * with the others being: | |
1784 | * 1) A close command is received for a stream | |
1785 | * 2) The control connection owning the stream is closed | |
1786 | * 3) We have received all of the stream's data _after_ a close | |
1787 | * request. | |
1788 | */ | |
1789 | try_stream_close(stream); | |
7591bab1 | 1790 | stream_put(stream); |
5312a3ed | 1791 | ret = 0; |
173af62f | 1792 | |
7591bab1 | 1793 | end: |
53efb85a | 1794 | memset(&reply, 0, sizeof(reply)); |
173af62f | 1795 | if (ret < 0) { |
f73fabfd | 1796 | reply.ret_code = htobe32(LTTNG_ERR_UNK); |
173af62f | 1797 | } else { |
f73fabfd | 1798 | reply.ret_code = htobe32(LTTNG_OK); |
173af62f | 1799 | } |
58eb9381 | 1800 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, |
173af62f | 1801 | sizeof(struct lttcomm_relayd_generic_reply), 0); |
5312a3ed JG |
1802 | if (send_ret < (ssize_t) sizeof(reply)) { |
1803 | ERR("Failed to send \"close stream\" command reply (ret = %zd)", | |
1804 | send_ret); | |
1805 | ret = -1; | |
173af62f DG |
1806 | } |
1807 | ||
1808 | end_no_session: | |
1809 | return ret; | |
1810 | } | |
1811 | ||
93ec662e JD |
1812 | /* |
1813 | * relay_reset_metadata: reset a metadata stream | |
1814 | */ | |
1815 | static | |
f46376a1 MJ |
1816 | int relay_reset_metadata( |
1817 | const struct lttcomm_relayd_hdr *recv_hdr __attribute__((unused)), | |
5312a3ed JG |
1818 | struct relay_connection *conn, |
1819 | const struct lttng_buffer_view *payload) | |
93ec662e | 1820 | { |
5312a3ed JG |
1821 | int ret; |
1822 | ssize_t send_ret; | |
93ec662e JD |
1823 | struct relay_session *session = conn->session; |
1824 | struct lttcomm_relayd_reset_metadata stream_info; | |
1825 | struct lttcomm_relayd_generic_reply reply; | |
1826 | struct relay_stream *stream; | |
1827 | ||
1828 | DBG("Reset metadata received"); | |
1829 | ||
5312a3ed | 1830 | if (!session || !conn->version_check_done) { |
93ec662e JD |
1831 | ERR("Trying to reset a metadata stream before version check"); |
1832 | ret = -1; | |
1833 | goto end_no_session; | |
1834 | } | |
1835 | ||
5312a3ed JG |
1836 | if (payload->size < sizeof(stream_info)) { |
1837 | ERR("Unexpected payload size in \"relay_reset_metadata\": expected >= %zu bytes, got %zu bytes", | |
1838 | sizeof(stream_info), payload->size); | |
93ec662e JD |
1839 | ret = -1; |
1840 | goto end_no_session; | |
1841 | } | |
5312a3ed JG |
1842 | memcpy(&stream_info, payload->data, sizeof(stream_info)); |
1843 | stream_info.stream_id = be64toh(stream_info.stream_id); | |
1844 | stream_info.version = be64toh(stream_info.version); | |
1845 | ||
1846 | DBG("Update metadata to version %" PRIu64, stream_info.version); | |
93ec662e JD |
1847 | |
1848 | /* Unsupported for live sessions for now. */ | |
1849 | if (session->live_timer != 0) { | |
1850 | ret = -1; | |
1851 | goto end; | |
1852 | } | |
1853 | ||
5312a3ed | 1854 | stream = stream_get_by_id(stream_info.stream_id); |
93ec662e JD |
1855 | if (!stream) { |
1856 | ret = -1; | |
1857 | goto end; | |
1858 | } | |
1859 | pthread_mutex_lock(&stream->lock); | |
1860 | if (!stream->is_metadata) { | |
1861 | ret = -1; | |
1862 | goto end_unlock; | |
1863 | } | |
1864 | ||
c35f9726 | 1865 | ret = stream_reset_file(stream); |
93ec662e | 1866 | if (ret < 0) { |
c35f9726 JG |
1867 | ERR("Failed to reset metadata stream %" PRIu64 |
1868 | ": stream_path = %s, channel = %s", | |
1869 | stream->stream_handle, stream->path_name, | |
1870 | stream->channel_name); | |
93ec662e JD |
1871 | goto end_unlock; |
1872 | } | |
93ec662e JD |
1873 | end_unlock: |
1874 | pthread_mutex_unlock(&stream->lock); | |
1875 | stream_put(stream); | |
1876 | ||
1877 | end: | |
1878 | memset(&reply, 0, sizeof(reply)); | |
1879 | if (ret < 0) { | |
1880 | reply.ret_code = htobe32(LTTNG_ERR_UNK); | |
1881 | } else { | |
1882 | reply.ret_code = htobe32(LTTNG_OK); | |
1883 | } | |
1884 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, | |
1885 | sizeof(struct lttcomm_relayd_generic_reply), 0); | |
5312a3ed JG |
1886 | if (send_ret < (ssize_t) sizeof(reply)) { |
1887 | ERR("Failed to send \"reset metadata\" command reply (ret = %zd)", | |
1888 | send_ret); | |
1889 | ret = -1; | |
93ec662e JD |
1890 | } |
1891 | ||
1892 | end_no_session: | |
1893 | return ret; | |
1894 | } | |
1895 | ||
b8aa1682 JD |
1896 | /* |
1897 | * relay_unknown_command: send -1 if received unknown command | |
1898 | */ | |
7591bab1 | 1899 | static void relay_unknown_command(struct relay_connection *conn) |
b8aa1682 JD |
1900 | { |
1901 | struct lttcomm_relayd_generic_reply reply; | |
5312a3ed | 1902 | ssize_t send_ret; |
b8aa1682 | 1903 | |
53efb85a | 1904 | memset(&reply, 0, sizeof(reply)); |
f73fabfd | 1905 | reply.ret_code = htobe32(LTTNG_ERR_UNK); |
5312a3ed JG |
1906 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
1907 | if (send_ret < sizeof(reply)) { | |
1908 | ERR("Failed to send \"unknown command\" command reply (ret = %zd)", send_ret); | |
b8aa1682 JD |
1909 | } |
1910 | } | |
1911 | ||
1912 | /* | |
1913 | * relay_start: send an acknowledgment to the client to tell if we are | |
1914 | * ready to receive data. We are ready if a session is established. | |
1915 | */ | |
f46376a1 MJ |
1916 | static int relay_start( |
1917 | const struct lttcomm_relayd_hdr *recv_hdr __attribute__((unused)), | |
5312a3ed | 1918 | struct relay_connection *conn, |
f46376a1 | 1919 | const struct lttng_buffer_view *payload __attribute__((unused))) |
b8aa1682 | 1920 | { |
5312a3ed JG |
1921 | int ret = 0; |
1922 | ssize_t send_ret; | |
b8aa1682 | 1923 | struct lttcomm_relayd_generic_reply reply; |
58eb9381 | 1924 | struct relay_session *session = conn->session; |
b8aa1682 JD |
1925 | |
1926 | if (!session) { | |
1927 | DBG("Trying to start the streaming without a session established"); | |
f73fabfd | 1928 | ret = htobe32(LTTNG_ERR_UNK); |
b8aa1682 JD |
1929 | } |
1930 | ||
53efb85a | 1931 | memset(&reply, 0, sizeof(reply)); |
5312a3ed JG |
1932 | reply.ret_code = htobe32(LTTNG_OK); |
1933 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, | |
1934 | sizeof(reply), 0); | |
1935 | if (send_ret < (ssize_t) sizeof(reply)) { | |
1936 | ERR("Failed to send \"relay_start\" command reply (ret = %zd)", | |
1937 | send_ret); | |
1938 | ret = -1; | |
b8aa1682 JD |
1939 | } |
1940 | ||
1941 | return ret; | |
1942 | } | |
1943 | ||
b8aa1682 | 1944 | /* |
7591bab1 | 1945 | * relay_recv_metadata: receive the metadata for the session. |
b8aa1682 | 1946 | */ |
5312a3ed JG |
1947 | static int relay_recv_metadata(const struct lttcomm_relayd_hdr *recv_hdr, |
1948 | struct relay_connection *conn, | |
1949 | const struct lttng_buffer_view *payload) | |
b8aa1682 | 1950 | { |
32d1569c | 1951 | int ret = 0; |
58eb9381 | 1952 | struct relay_session *session = conn->session; |
5312a3ed | 1953 | struct lttcomm_relayd_metadata_payload metadata_payload_header; |
b8aa1682 | 1954 | struct relay_stream *metadata_stream; |
5312a3ed | 1955 | uint64_t metadata_payload_size; |
c35f9726 | 1956 | struct lttng_buffer_view packet_view; |
b8aa1682 JD |
1957 | |
1958 | if (!session) { | |
1959 | ERR("Metadata sent before version check"); | |
1960 | ret = -1; | |
1961 | goto end; | |
1962 | } | |
1963 | ||
5312a3ed | 1964 | if (recv_hdr->data_size < sizeof(struct lttcomm_relayd_metadata_payload)) { |
f6416125 MD |
1965 | ERR("Incorrect data size"); |
1966 | ret = -1; | |
1967 | goto end; | |
1968 | } | |
5312a3ed JG |
1969 | metadata_payload_size = recv_hdr->data_size - |
1970 | sizeof(struct lttcomm_relayd_metadata_payload); | |
f6416125 | 1971 | |
5312a3ed JG |
1972 | memcpy(&metadata_payload_header, payload->data, |
1973 | sizeof(metadata_payload_header)); | |
1974 | metadata_payload_header.stream_id = be64toh( | |
1975 | metadata_payload_header.stream_id); | |
1976 | metadata_payload_header.padding_size = be32toh( | |
1977 | metadata_payload_header.padding_size); | |
9d1bbf21 | 1978 | |
5312a3ed | 1979 | metadata_stream = stream_get_by_id(metadata_payload_header.stream_id); |
b8aa1682 JD |
1980 | if (!metadata_stream) { |
1981 | ret = -1; | |
7591bab1 | 1982 | goto end; |
b8aa1682 JD |
1983 | } |
1984 | ||
c35f9726 JG |
1985 | packet_view = lttng_buffer_view_from_view(payload, |
1986 | sizeof(metadata_payload_header), metadata_payload_size); | |
3e6e0df2 | 1987 | if (!lttng_buffer_view_is_valid(&packet_view)) { |
c35f9726 | 1988 | ERR("Invalid metadata packet length announced by header"); |
b8aa1682 | 1989 | ret = -1; |
7591bab1 | 1990 | goto end_put; |
b8aa1682 | 1991 | } |
1d4dfdef | 1992 | |
c35f9726 JG |
1993 | pthread_mutex_lock(&metadata_stream->lock); |
1994 | ret = stream_write(metadata_stream, &packet_view, | |
5312a3ed | 1995 | metadata_payload_header.padding_size); |
c35f9726 JG |
1996 | pthread_mutex_unlock(&metadata_stream->lock); |
1997 | if (ret){ | |
5312a3ed | 1998 | ret = -1; |
7591bab1 | 1999 | goto end_put; |
1d4dfdef | 2000 | } |
7591bab1 | 2001 | end_put: |
7591bab1 | 2002 | stream_put(metadata_stream); |
b8aa1682 JD |
2003 | end: |
2004 | return ret; | |
2005 | } | |
2006 | ||
2007 | /* | |
2008 | * relay_send_version: send relayd version number | |
2009 | */ | |
f46376a1 MJ |
2010 | static int relay_send_version( |
2011 | const struct lttcomm_relayd_hdr *recv_hdr __attribute__((unused)), | |
5312a3ed JG |
2012 | struct relay_connection *conn, |
2013 | const struct lttng_buffer_view *payload) | |
b8aa1682 | 2014 | { |
7f51dcba | 2015 | int ret; |
5312a3ed | 2016 | ssize_t send_ret; |
092b6259 | 2017 | struct lttcomm_relayd_version reply, msg; |
87cb6359 | 2018 | bool compatible = true; |
b8aa1682 | 2019 | |
5312a3ed | 2020 | conn->version_check_done = true; |
b8aa1682 | 2021 | |
092b6259 | 2022 | /* Get version from the other side. */ |
5312a3ed JG |
2023 | if (payload->size < sizeof(msg)) { |
2024 | ERR("Unexpected payload size in \"relay_send_version\": expected >= %zu bytes, got %zu bytes", | |
2025 | sizeof(msg), payload->size); | |
092b6259 | 2026 | ret = -1; |
092b6259 DG |
2027 | goto end; |
2028 | } | |
2029 | ||
5312a3ed JG |
2030 | memcpy(&msg, payload->data, sizeof(msg)); |
2031 | msg.major = be32toh(msg.major); | |
2032 | msg.minor = be32toh(msg.minor); | |
2033 | ||
53efb85a | 2034 | memset(&reply, 0, sizeof(reply)); |
d83a952c MD |
2035 | reply.major = RELAYD_VERSION_COMM_MAJOR; |
2036 | reply.minor = RELAYD_VERSION_COMM_MINOR; | |
d4519fa3 JD |
2037 | |
2038 | /* Major versions must be the same */ | |
5312a3ed | 2039 | if (reply.major != msg.major) { |
6151a90f | 2040 | DBG("Incompatible major versions (%u vs %u), deleting session", |
5312a3ed | 2041 | reply.major, msg.major); |
87cb6359 | 2042 | compatible = false; |
d4519fa3 JD |
2043 | } |
2044 | ||
58eb9381 | 2045 | conn->major = reply.major; |
0f907de1 | 2046 | /* We adapt to the lowest compatible version */ |
5312a3ed | 2047 | if (reply.minor <= msg.minor) { |
58eb9381 | 2048 | conn->minor = reply.minor; |
0f907de1 | 2049 | } else { |
5312a3ed | 2050 | conn->minor = msg.minor; |
0f907de1 JD |
2051 | } |
2052 | ||
6151a90f JD |
2053 | reply.major = htobe32(reply.major); |
2054 | reply.minor = htobe32(reply.minor); | |
5312a3ed JG |
2055 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, |
2056 | sizeof(reply), 0); | |
2057 | if (send_ret < (ssize_t) sizeof(reply)) { | |
2058 | ERR("Failed to send \"send version\" command reply (ret = %zd)", | |
2059 | send_ret); | |
2060 | ret = -1; | |
2061 | goto end; | |
2062 | } else { | |
2063 | ret = 0; | |
6151a90f JD |
2064 | } |
2065 | ||
87cb6359 JD |
2066 | if (!compatible) { |
2067 | ret = -1; | |
2068 | goto end; | |
2069 | } | |
2070 | ||
58eb9381 DG |
2071 | DBG("Version check done using protocol %u.%u", conn->major, |
2072 | conn->minor); | |
b8aa1682 JD |
2073 | |
2074 | end: | |
2075 | return ret; | |
2076 | } | |
2077 | ||
c8f59ee5 | 2078 | /* |
6d805429 | 2079 | * Check for data pending for a given stream id from the session daemon. |
c8f59ee5 | 2080 | */ |
f46376a1 MJ |
2081 | static int relay_data_pending( |
2082 | const struct lttcomm_relayd_hdr *recv_hdr __attribute__((unused)), | |
5312a3ed JG |
2083 | struct relay_connection *conn, |
2084 | const struct lttng_buffer_view *payload) | |
c8f59ee5 | 2085 | { |
58eb9381 | 2086 | struct relay_session *session = conn->session; |
6d805429 | 2087 | struct lttcomm_relayd_data_pending msg; |
c8f59ee5 DG |
2088 | struct lttcomm_relayd_generic_reply reply; |
2089 | struct relay_stream *stream; | |
5312a3ed | 2090 | ssize_t send_ret; |
c8f59ee5 | 2091 | int ret; |
298a25ca | 2092 | uint64_t stream_seq; |
c8f59ee5 | 2093 | |
6d805429 | 2094 | DBG("Data pending command received"); |
c8f59ee5 | 2095 | |
5312a3ed | 2096 | if (!session || !conn->version_check_done) { |
c8f59ee5 DG |
2097 | ERR("Trying to check for data before version check"); |
2098 | ret = -1; | |
2099 | goto end_no_session; | |
2100 | } | |
2101 | ||
5312a3ed JG |
2102 | if (payload->size < sizeof(msg)) { |
2103 | ERR("Unexpected payload size in \"relay_data_pending\": expected >= %zu bytes, got %zu bytes", | |
2104 | sizeof(msg), payload->size); | |
c8f59ee5 DG |
2105 | ret = -1; |
2106 | goto end_no_session; | |
2107 | } | |
5312a3ed JG |
2108 | memcpy(&msg, payload->data, sizeof(msg)); |
2109 | msg.stream_id = be64toh(msg.stream_id); | |
2110 | msg.last_net_seq_num = be64toh(msg.last_net_seq_num); | |
c8f59ee5 | 2111 | |
5312a3ed | 2112 | stream = stream_get_by_id(msg.stream_id); |
de91f48a | 2113 | if (stream == NULL) { |
c8f59ee5 | 2114 | ret = -1; |
7591bab1 | 2115 | goto end; |
c8f59ee5 DG |
2116 | } |
2117 | ||
7591bab1 MD |
2118 | pthread_mutex_lock(&stream->lock); |
2119 | ||
298a25ca JG |
2120 | if (session_streams_have_index(session)) { |
2121 | /* | |
2122 | * Ensure that both the index and stream data have been | |
2123 | * flushed up to the requested point. | |
2124 | */ | |
ac497a37 | 2125 | stream_seq = std::min(stream->prev_data_seq, stream->prev_index_seq); |
298a25ca | 2126 | } else { |
a8f9f353 | 2127 | stream_seq = stream->prev_data_seq; |
298a25ca | 2128 | } |
a8f9f353 | 2129 | DBG("Data pending for stream id %" PRIu64 ": prev_data_seq %" PRIu64 |
298a25ca JG |
2130 | ", prev_index_seq %" PRIu64 |
2131 | ", and last_seq %" PRIu64, msg.stream_id, | |
a8f9f353 | 2132 | stream->prev_data_seq, stream->prev_index_seq, |
298a25ca | 2133 | msg.last_net_seq_num); |
c8f59ee5 | 2134 | |
33832e64 | 2135 | /* Avoid wrapping issue */ |
298a25ca | 2136 | if (((int64_t) (stream_seq - msg.last_net_seq_num)) >= 0) { |
6d805429 | 2137 | /* Data has in fact been written and is NOT pending */ |
c8f59ee5 | 2138 | ret = 0; |
6d805429 DG |
2139 | } else { |
2140 | /* Data still being streamed thus pending */ | |
2141 | ret = 1; | |
c8f59ee5 DG |
2142 | } |
2143 | ||
7591bab1 MD |
2144 | stream->data_pending_check_done = true; |
2145 | pthread_mutex_unlock(&stream->lock); | |
f7079f67 | 2146 | |
7591bab1 MD |
2147 | stream_put(stream); |
2148 | end: | |
c8f59ee5 | 2149 | |
53efb85a | 2150 | memset(&reply, 0, sizeof(reply)); |
c8f59ee5 | 2151 | reply.ret_code = htobe32(ret); |
5312a3ed JG |
2152 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
2153 | if (send_ret < (ssize_t) sizeof(reply)) { | |
2154 | ERR("Failed to send \"data pending\" command reply (ret = %zd)", | |
2155 | send_ret); | |
2156 | ret = -1; | |
c8f59ee5 DG |
2157 | } |
2158 | ||
2159 | end_no_session: | |
2160 | return ret; | |
2161 | } | |
2162 | ||
2163 | /* | |
2164 | * Wait for the control socket to reach a quiescent state. | |
2165 | * | |
7591bab1 MD |
2166 | * Note that for now, when receiving this command from the session |
2167 | * daemon, this means that every subsequent commands or data received on | |
2168 | * the control socket has been handled. So, this is why we simply return | |
2169 | * OK here. | |
c8f59ee5 | 2170 | */ |
f46376a1 MJ |
2171 | static int relay_quiescent_control( |
2172 | const struct lttcomm_relayd_hdr *recv_hdr __attribute__((unused)), | |
5312a3ed JG |
2173 | struct relay_connection *conn, |
2174 | const struct lttng_buffer_view *payload) | |
c8f59ee5 DG |
2175 | { |
2176 | int ret; | |
5312a3ed | 2177 | ssize_t send_ret; |
ad7051c0 | 2178 | struct relay_stream *stream; |
ad7051c0 | 2179 | struct lttcomm_relayd_quiescent_control msg; |
c8f59ee5 DG |
2180 | struct lttcomm_relayd_generic_reply reply; |
2181 | ||
2182 | DBG("Checking quiescent state on control socket"); | |
2183 | ||
5312a3ed | 2184 | if (!conn->session || !conn->version_check_done) { |
ad7051c0 DG |
2185 | ERR("Trying to check for data before version check"); |
2186 | ret = -1; | |
2187 | goto end_no_session; | |
2188 | } | |
2189 | ||
5312a3ed JG |
2190 | if (payload->size < sizeof(msg)) { |
2191 | ERR("Unexpected payload size in \"relay_quiescent_control\": expected >= %zu bytes, got %zu bytes", | |
2192 | sizeof(msg), payload->size); | |
ad7051c0 DG |
2193 | ret = -1; |
2194 | goto end_no_session; | |
2195 | } | |
5312a3ed JG |
2196 | memcpy(&msg, payload->data, sizeof(msg)); |
2197 | msg.stream_id = be64toh(msg.stream_id); | |
ad7051c0 | 2198 | |
5312a3ed | 2199 | stream = stream_get_by_id(msg.stream_id); |
7591bab1 MD |
2200 | if (!stream) { |
2201 | goto reply; | |
2202 | } | |
2203 | pthread_mutex_lock(&stream->lock); | |
2204 | stream->data_pending_check_done = true; | |
2205 | pthread_mutex_unlock(&stream->lock); | |
5312a3ed JG |
2206 | |
2207 | DBG("Relay quiescent control pending flag set to %" PRIu64, msg.stream_id); | |
7591bab1 MD |
2208 | stream_put(stream); |
2209 | reply: | |
53efb85a | 2210 | memset(&reply, 0, sizeof(reply)); |
c8f59ee5 | 2211 | reply.ret_code = htobe32(LTTNG_OK); |
5312a3ed JG |
2212 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
2213 | if (send_ret < (ssize_t) sizeof(reply)) { | |
2214 | ERR("Failed to send \"quiescent control\" command reply (ret = %zd)", | |
2215 | send_ret); | |
2216 | ret = -1; | |
2217 | } else { | |
2218 | ret = 0; | |
c8f59ee5 DG |
2219 | } |
2220 | ||
ad7051c0 | 2221 | end_no_session: |
c8f59ee5 DG |
2222 | return ret; |
2223 | } | |
2224 | ||
f7079f67 | 2225 | /* |
7591bab1 MD |
2226 | * Initialize a data pending command. This means that a consumer is about |
2227 | * to ask for data pending for each stream it holds. Simply iterate over | |
2228 | * all streams of a session and set the data_pending_check_done flag. | |
f7079f67 DG |
2229 | * |
2230 | * This command returns to the client a LTTNG_OK code. | |
2231 | */ | |
5312a3ed JG |
2232 | static int relay_begin_data_pending(const struct lttcomm_relayd_hdr *recv_hdr, |
2233 | struct relay_connection *conn, | |
2234 | const struct lttng_buffer_view *payload) | |
f7079f67 DG |
2235 | { |
2236 | int ret; | |
5312a3ed | 2237 | ssize_t send_ret; |
f7079f67 DG |
2238 | struct lttng_ht_iter iter; |
2239 | struct lttcomm_relayd_begin_data_pending msg; | |
2240 | struct lttcomm_relayd_generic_reply reply; | |
2241 | struct relay_stream *stream; | |
f7079f67 | 2242 | |
a0377dfe FD |
2243 | LTTNG_ASSERT(recv_hdr); |
2244 | LTTNG_ASSERT(conn); | |
f7079f67 DG |
2245 | |
2246 | DBG("Init streams for data pending"); | |
2247 | ||
5312a3ed | 2248 | if (!conn->session || !conn->version_check_done) { |
f7079f67 DG |
2249 | ERR("Trying to check for data before version check"); |
2250 | ret = -1; | |
2251 | goto end_no_session; | |
2252 | } | |
2253 | ||
5312a3ed JG |
2254 | if (payload->size < sizeof(msg)) { |
2255 | ERR("Unexpected payload size in \"relay_begin_data_pending\": expected >= %zu bytes, got %zu bytes", | |
2256 | sizeof(msg), payload->size); | |
f7079f67 DG |
2257 | ret = -1; |
2258 | goto end_no_session; | |
2259 | } | |
5312a3ed JG |
2260 | memcpy(&msg, payload->data, sizeof(msg)); |
2261 | msg.session_id = be64toh(msg.session_id); | |
f7079f67 DG |
2262 | |
2263 | /* | |
7591bab1 MD |
2264 | * Iterate over all streams to set the begin data pending flag. |
2265 | * For now, the streams are indexed by stream handle so we have | |
2266 | * to iterate over all streams to find the one associated with | |
2267 | * the right session_id. | |
f7079f67 DG |
2268 | */ |
2269 | rcu_read_lock(); | |
d3e2ba59 | 2270 | cds_lfht_for_each_entry(relay_streams_ht->ht, &iter.iter, stream, |
2a174661 | 2271 | node.node) { |
7591bab1 MD |
2272 | if (!stream_get(stream)) { |
2273 | continue; | |
2274 | } | |
5312a3ed | 2275 | if (stream->trace->session->id == msg.session_id) { |
7591bab1 MD |
2276 | pthread_mutex_lock(&stream->lock); |
2277 | stream->data_pending_check_done = false; | |
2278 | pthread_mutex_unlock(&stream->lock); | |
f7079f67 DG |
2279 | DBG("Set begin data pending flag to stream %" PRIu64, |
2280 | stream->stream_handle); | |
2281 | } | |
7591bab1 | 2282 | stream_put(stream); |
f7079f67 DG |
2283 | } |
2284 | rcu_read_unlock(); | |
2285 | ||
53efb85a | 2286 | memset(&reply, 0, sizeof(reply)); |
f7079f67 DG |
2287 | /* All good, send back reply. */ |
2288 | reply.ret_code = htobe32(LTTNG_OK); | |
2289 | ||
5312a3ed JG |
2290 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
2291 | if (send_ret < (ssize_t) sizeof(reply)) { | |
2292 | ERR("Failed to send \"begin data pending\" command reply (ret = %zd)", | |
2293 | send_ret); | |
2294 | ret = -1; | |
2295 | } else { | |
2296 | ret = 0; | |
f7079f67 DG |
2297 | } |
2298 | ||
2299 | end_no_session: | |
2300 | return ret; | |
2301 | } | |
2302 | ||
2303 | /* | |
7591bab1 MD |
2304 | * End data pending command. This will check, for a given session id, if |
2305 | * each stream associated with it has its data_pending_check_done flag | |
2306 | * set. If not, this means that the client lost track of the stream but | |
2307 | * the data is still being streamed on our side. In this case, we inform | |
2308 | * the client that data is in flight. | |
f7079f67 DG |
2309 | * |
2310 | * Return to the client if there is data in flight or not with a ret_code. | |
2311 | */ | |
f46376a1 MJ |
2312 | static int relay_end_data_pending( |
2313 | const struct lttcomm_relayd_hdr *recv_hdr __attribute__((unused)), | |
5312a3ed JG |
2314 | struct relay_connection *conn, |
2315 | const struct lttng_buffer_view *payload) | |
f7079f67 DG |
2316 | { |
2317 | int ret; | |
5312a3ed | 2318 | ssize_t send_ret; |
f7079f67 DG |
2319 | struct lttng_ht_iter iter; |
2320 | struct lttcomm_relayd_end_data_pending msg; | |
2321 | struct lttcomm_relayd_generic_reply reply; | |
2322 | struct relay_stream *stream; | |
f7079f67 DG |
2323 | uint32_t is_data_inflight = 0; |
2324 | ||
f7079f67 DG |
2325 | DBG("End data pending command"); |
2326 | ||
5312a3ed | 2327 | if (!conn->session || !conn->version_check_done) { |
f7079f67 DG |
2328 | ERR("Trying to check for data before version check"); |
2329 | ret = -1; | |
2330 | goto end_no_session; | |
2331 | } | |
2332 | ||
5312a3ed JG |
2333 | if (payload->size < sizeof(msg)) { |
2334 | ERR("Unexpected payload size in \"relay_end_data_pending\": expected >= %zu bytes, got %zu bytes", | |
2335 | sizeof(msg), payload->size); | |
f7079f67 DG |
2336 | ret = -1; |
2337 | goto end_no_session; | |
2338 | } | |
5312a3ed JG |
2339 | memcpy(&msg, payload->data, sizeof(msg)); |
2340 | msg.session_id = be64toh(msg.session_id); | |
f7079f67 | 2341 | |
7591bab1 MD |
2342 | /* |
2343 | * Iterate over all streams to see if the begin data pending | |
2344 | * flag is set. | |
2345 | */ | |
f7079f67 | 2346 | rcu_read_lock(); |
d3e2ba59 | 2347 | cds_lfht_for_each_entry(relay_streams_ht->ht, &iter.iter, stream, |
2a174661 | 2348 | node.node) { |
7591bab1 MD |
2349 | if (!stream_get(stream)) { |
2350 | continue; | |
2351 | } | |
5312a3ed | 2352 | if (stream->trace->session->id != msg.session_id) { |
7591bab1 MD |
2353 | stream_put(stream); |
2354 | continue; | |
2355 | } | |
2356 | pthread_mutex_lock(&stream->lock); | |
2357 | if (!stream->data_pending_check_done) { | |
298a25ca JG |
2358 | uint64_t stream_seq; |
2359 | ||
2360 | if (session_streams_have_index(conn->session)) { | |
2361 | /* | |
2362 | * Ensure that both the index and stream data have been | |
2363 | * flushed up to the requested point. | |
2364 | */ | |
ac497a37 | 2365 | stream_seq = std::min(stream->prev_data_seq, stream->prev_index_seq); |
298a25ca | 2366 | } else { |
a8f9f353 | 2367 | stream_seq = stream->prev_data_seq; |
298a25ca JG |
2368 | } |
2369 | if (!stream->closed || !(((int64_t) (stream_seq - stream->last_net_seq_num)) >= 0)) { | |
7591bab1 MD |
2370 | is_data_inflight = 1; |
2371 | DBG("Data is still in flight for stream %" PRIu64, | |
2372 | stream->stream_handle); | |
2373 | pthread_mutex_unlock(&stream->lock); | |
2374 | stream_put(stream); | |
2375 | break; | |
2376 | } | |
f7079f67 | 2377 | } |
7591bab1 MD |
2378 | pthread_mutex_unlock(&stream->lock); |
2379 | stream_put(stream); | |
f7079f67 DG |
2380 | } |
2381 | rcu_read_unlock(); | |
2382 | ||
53efb85a | 2383 | memset(&reply, 0, sizeof(reply)); |
f7079f67 DG |
2384 | /* All good, send back reply. */ |
2385 | reply.ret_code = htobe32(is_data_inflight); | |
2386 | ||
5312a3ed JG |
2387 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
2388 | if (send_ret < (ssize_t) sizeof(reply)) { | |
2389 | ERR("Failed to send \"end data pending\" command reply (ret = %zd)", | |
2390 | send_ret); | |
2391 | ret = -1; | |
2392 | } else { | |
2393 | ret = 0; | |
f7079f67 DG |
2394 | } |
2395 | ||
2396 | end_no_session: | |
2397 | return ret; | |
2398 | } | |
2399 | ||
1c20f0e2 JD |
2400 | /* |
2401 | * Receive an index for a specific stream. | |
2402 | * | |
2403 | * Return 0 on success else a negative value. | |
2404 | */ | |
f46376a1 MJ |
2405 | static int relay_recv_index( |
2406 | const struct lttcomm_relayd_hdr *recv_hdr __attribute__((unused)), | |
5312a3ed JG |
2407 | struct relay_connection *conn, |
2408 | const struct lttng_buffer_view *payload) | |
1c20f0e2 | 2409 | { |
5312a3ed JG |
2410 | int ret; |
2411 | ssize_t send_ret; | |
58eb9381 | 2412 | struct relay_session *session = conn->session; |
1c20f0e2 | 2413 | struct lttcomm_relayd_index index_info; |
1c20f0e2 JD |
2414 | struct lttcomm_relayd_generic_reply reply; |
2415 | struct relay_stream *stream; | |
f8f3885c | 2416 | size_t msg_len; |
1c20f0e2 | 2417 | |
a0377dfe | 2418 | LTTNG_ASSERT(conn); |
1c20f0e2 JD |
2419 | |
2420 | DBG("Relay receiving index"); | |
2421 | ||
5312a3ed | 2422 | if (!session || !conn->version_check_done) { |
1c20f0e2 JD |
2423 | ERR("Trying to close a stream before version check"); |
2424 | ret = -1; | |
2425 | goto end_no_session; | |
2426 | } | |
2427 | ||
f8f3885c MD |
2428 | msg_len = lttcomm_relayd_index_len( |
2429 | lttng_to_index_major(conn->major, conn->minor), | |
2430 | lttng_to_index_minor(conn->major, conn->minor)); | |
5312a3ed JG |
2431 | if (payload->size < msg_len) { |
2432 | ERR("Unexpected payload size in \"relay_recv_index\": expected >= %zu bytes, got %zu bytes", | |
2433 | msg_len, payload->size); | |
1c20f0e2 JD |
2434 | ret = -1; |
2435 | goto end_no_session; | |
2436 | } | |
5312a3ed JG |
2437 | memcpy(&index_info, payload->data, msg_len); |
2438 | index_info.relay_stream_id = be64toh(index_info.relay_stream_id); | |
2439 | index_info.net_seq_num = be64toh(index_info.net_seq_num); | |
2440 | index_info.packet_size = be64toh(index_info.packet_size); | |
2441 | index_info.content_size = be64toh(index_info.content_size); | |
2442 | index_info.timestamp_begin = be64toh(index_info.timestamp_begin); | |
2443 | index_info.timestamp_end = be64toh(index_info.timestamp_end); | |
2444 | index_info.events_discarded = be64toh(index_info.events_discarded); | |
2445 | index_info.stream_id = be64toh(index_info.stream_id); | |
81df238b JR |
2446 | |
2447 | if (conn->minor >= 8) { | |
2448 | index_info.stream_instance_id = | |
2449 | be64toh(index_info.stream_instance_id); | |
2450 | index_info.packet_seq_num = be64toh(index_info.packet_seq_num); | |
0f83d1cc MD |
2451 | } else { |
2452 | index_info.stream_instance_id = -1ULL; | |
2453 | index_info.packet_seq_num = -1ULL; | |
81df238b | 2454 | } |
5312a3ed JG |
2455 | |
2456 | stream = stream_get_by_id(index_info.relay_stream_id); | |
1c20f0e2 | 2457 | if (!stream) { |
7591bab1 | 2458 | ERR("stream_get_by_id not found"); |
1c20f0e2 | 2459 | ret = -1; |
7591bab1 | 2460 | goto end; |
1c20f0e2 | 2461 | } |
d3e2ba59 | 2462 | |
c35f9726 JG |
2463 | pthread_mutex_lock(&stream->lock); |
2464 | ret = stream_add_index(stream, &index_info); | |
2465 | pthread_mutex_unlock(&stream->lock); | |
2466 | if (ret) { | |
7591bab1 MD |
2467 | goto end_stream_put; |
2468 | } | |
1c20f0e2 | 2469 | |
7591bab1 | 2470 | end_stream_put: |
7591bab1 | 2471 | stream_put(stream); |
7591bab1 | 2472 | end: |
53efb85a | 2473 | memset(&reply, 0, sizeof(reply)); |
1c20f0e2 JD |
2474 | if (ret < 0) { |
2475 | reply.ret_code = htobe32(LTTNG_ERR_UNK); | |
2476 | } else { | |
2477 | reply.ret_code = htobe32(LTTNG_OK); | |
2478 | } | |
58eb9381 | 2479 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
5312a3ed JG |
2480 | if (send_ret < (ssize_t) sizeof(reply)) { |
2481 | ERR("Failed to send \"recv index\" command reply (ret = %zd)", send_ret); | |
2482 | ret = -1; | |
1c20f0e2 JD |
2483 | } |
2484 | ||
2485 | end_no_session: | |
2486 | return ret; | |
2487 | } | |
2488 | ||
a4baae1b JD |
2489 | /* |
2490 | * Receive the streams_sent message. | |
2491 | * | |
2492 | * Return 0 on success else a negative value. | |
2493 | */ | |
f46376a1 MJ |
2494 | static int relay_streams_sent( |
2495 | const struct lttcomm_relayd_hdr *recv_hdr __attribute__((unused)), | |
5312a3ed | 2496 | struct relay_connection *conn, |
f46376a1 | 2497 | const struct lttng_buffer_view *payload __attribute__((unused))) |
a4baae1b | 2498 | { |
5312a3ed JG |
2499 | int ret; |
2500 | ssize_t send_ret; | |
a4baae1b JD |
2501 | struct lttcomm_relayd_generic_reply reply; |
2502 | ||
a0377dfe | 2503 | LTTNG_ASSERT(conn); |
a4baae1b JD |
2504 | |
2505 | DBG("Relay receiving streams_sent"); | |
2506 | ||
5312a3ed | 2507 | if (!conn->session || !conn->version_check_done) { |
a4baae1b JD |
2508 | ERR("Trying to close a stream before version check"); |
2509 | ret = -1; | |
2510 | goto end_no_session; | |
2511 | } | |
2512 | ||
2513 | /* | |
7591bab1 MD |
2514 | * Publish every pending stream in the connection recv list which are |
2515 | * now ready to be used by the viewer. | |
4a9daf17 | 2516 | */ |
7591bab1 | 2517 | publish_connection_local_streams(conn); |
4a9daf17 | 2518 | |
53efb85a | 2519 | memset(&reply, 0, sizeof(reply)); |
a4baae1b | 2520 | reply.ret_code = htobe32(LTTNG_OK); |
58eb9381 | 2521 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, sizeof(reply), 0); |
5312a3ed JG |
2522 | if (send_ret < (ssize_t) sizeof(reply)) { |
2523 | ERR("Failed to send \"streams sent\" command reply (ret = %zd)", | |
2524 | send_ret); | |
2525 | ret = -1; | |
a4baae1b JD |
2526 | } else { |
2527 | /* Success. */ | |
2528 | ret = 0; | |
2529 | } | |
2530 | ||
2531 | end_no_session: | |
2532 | return ret; | |
2533 | } | |
2534 | ||
ce9dbd47 JG |
2535 | static ssize_t relay_unpack_rotate_streams_header( |
2536 | const struct lttng_buffer_view *payload, | |
2537 | struct lttcomm_relayd_rotate_streams *_rotate_streams) | |
2538 | { | |
2539 | struct lttcomm_relayd_rotate_streams rotate_streams; | |
2540 | /* | |
2541 | * Set to the smallest version (packed) of `lttcomm_relayd_rotate_streams`. | |
2542 | * This is the smallest version of this structure, but it can be larger; | |
2543 | * this variable is updated once the proper size of the structure is known. | |
2544 | * | |
2545 | * See comment at the declaration of this structure for more information. | |
2546 | */ | |
2547 | ssize_t header_len = sizeof(struct lttcomm_relayd_rotate_streams_packed); | |
2548 | size_t expected_payload_size_no_padding, | |
2549 | expected_payload_size_3_bytes_padding, | |
2550 | expected_payload_size_7_bytes_padding; | |
2551 | ||
2552 | if (payload->size < header_len) { | |
2553 | ERR("Unexpected payload size in \"relay_rotate_session_stream\": expected >= %zu bytes, got %zu bytes", | |
2554 | header_len, payload->size); | |
2555 | goto error; | |
2556 | } | |
2557 | ||
2558 | /* | |
2559 | * Some versions incorrectly omitted the LTTNG_PACKED annotation on the | |
2560 | * `new_chunk_id` optional field of struct lttcomm_relayd_rotate_streams. | |
2561 | * | |
2562 | * We start by "unpacking" `stream_count` to figure out the padding length | |
2563 | * emited by our peer. | |
2564 | */ | |
11bcbf89 JG |
2565 | { |
2566 | decltype(rotate_streams.stream_count) stream_count; | |
2567 | ||
2568 | memcpy(&stream_count, payload->data, sizeof(stream_count)); | |
2569 | rotate_streams.stream_count = be32toh(stream_count); | |
2570 | } | |
2571 | ||
2572 | rotate_streams.new_chunk_id = LTTNG_OPTIONAL_INIT_UNSET; | |
ce9dbd47 JG |
2573 | |
2574 | /* | |
2575 | * Payload size expected given the possible padding lengths in | |
2576 | * `struct lttcomm_relayd_rotate_streams`. | |
2577 | */ | |
2578 | expected_payload_size_no_padding = (rotate_streams.stream_count * | |
2579 | sizeof(*rotate_streams.rotation_positions)) + | |
2580 | sizeof(lttcomm_relayd_rotate_streams_packed); | |
2581 | expected_payload_size_3_bytes_padding = (rotate_streams.stream_count * | |
2582 | sizeof(*rotate_streams.rotation_positions)) + | |
2583 | sizeof(lttcomm_relayd_rotate_streams_3_bytes_padding); | |
2584 | expected_payload_size_7_bytes_padding = (rotate_streams.stream_count * | |
2585 | sizeof(*rotate_streams.rotation_positions)) + | |
2586 | sizeof(lttcomm_relayd_rotate_streams_7_bytes_padding); | |
2587 | ||
2588 | if (payload->size == expected_payload_size_no_padding) { | |
2589 | struct lttcomm_relayd_rotate_streams_packed packed_rotate_streams; | |
2590 | ||
2591 | /* | |
2592 | * This handles cases where someone might build with | |
2593 | * -fpack-struct or any other toolchain that wouldn't produce | |
2594 | * padding to align `value`. | |
2595 | */ | |
2596 | DBG("Received `struct lttcomm_relayd_rotate_streams` with no padding"); | |
2597 | ||
2598 | header_len = sizeof(packed_rotate_streams); | |
2599 | memcpy(&packed_rotate_streams, payload->data, header_len); | |
2600 | ||
2601 | /* Unpack the packed structure to the natively-packed version. */ | |
11bcbf89 JG |
2602 | _rotate_streams->new_chunk_id = (typeof(_rotate_streams->new_chunk_id)){ |
2603 | .is_set = !!packed_rotate_streams.new_chunk_id.is_set, | |
2604 | .value = be64toh(packed_rotate_streams.new_chunk_id.value), | |
ce9dbd47 | 2605 | }; |
11bcbf89 | 2606 | _rotate_streams->stream_count = be32toh(packed_rotate_streams.stream_count); |
ce9dbd47 JG |
2607 | } else if (payload->size == expected_payload_size_3_bytes_padding) { |
2608 | struct lttcomm_relayd_rotate_streams_3_bytes_padding padded_rotate_streams; | |
2609 | ||
2610 | DBG("Received `struct lttcomm_relayd_rotate_streams` with 3 bytes of padding (4-byte aligned peer)"); | |
2611 | ||
2612 | header_len = sizeof(padded_rotate_streams); | |
2613 | memcpy(&padded_rotate_streams, payload->data, header_len); | |
2614 | ||
2615 | /* Unpack the 3-byte padded structure to the natively-packed version. */ | |
11bcbf89 JG |
2616 | _rotate_streams->new_chunk_id = (typeof(_rotate_streams->new_chunk_id)){ |
2617 | .is_set = !!padded_rotate_streams.new_chunk_id.is_set, | |
2618 | .value = be64toh(padded_rotate_streams.new_chunk_id.value), | |
ce9dbd47 | 2619 | }; |
11bcbf89 | 2620 | _rotate_streams->stream_count = be32toh(padded_rotate_streams.stream_count); |
ce9dbd47 JG |
2621 | } else if (payload->size == expected_payload_size_7_bytes_padding) { |
2622 | struct lttcomm_relayd_rotate_streams_7_bytes_padding padded_rotate_streams; | |
2623 | ||
2624 | DBG("Received `struct lttcomm_relayd_rotate_streams` with 7 bytes of padding (8-byte aligned peer)"); | |
2625 | ||
2626 | header_len = sizeof(padded_rotate_streams); | |
2627 | memcpy(&padded_rotate_streams, payload->data, header_len); | |
2628 | ||
2629 | /* Unpack the 7-byte padded structure to the natively-packed version. */ | |
11bcbf89 JG |
2630 | _rotate_streams->new_chunk_id = (typeof(_rotate_streams->new_chunk_id)){ |
2631 | .is_set = !!padded_rotate_streams.new_chunk_id.is_set, | |
2632 | .value = be64toh(padded_rotate_streams.new_chunk_id.value), | |
ce9dbd47 | 2633 | }; |
11bcbf89 | 2634 | _rotate_streams->stream_count = be32toh(padded_rotate_streams.stream_count); |
ce9dbd47 JG |
2635 | |
2636 | header_len = sizeof(padded_rotate_streams); | |
2637 | } else { | |
2638 | ERR("Unexpected payload size in \"relay_rotate_session_stream\": expected %zu, %zu or %zu bytes, got %zu bytes", | |
2639 | expected_payload_size_no_padding, | |
2640 | expected_payload_size_3_bytes_padding, | |
2641 | expected_payload_size_7_bytes_padding, | |
2642 | payload->size); | |
2643 | goto error; | |
2644 | } | |
2645 | ||
2646 | return header_len; | |
2647 | error: | |
2648 | return -1; | |
2649 | } | |
2650 | ||
d3ecc550 | 2651 | /* |
c35f9726 JG |
2652 | * relay_rotate_session_stream: rotate a stream to a new tracefile for the |
2653 | * session rotation feature (not the tracefile rotation feature). | |
d3ecc550 | 2654 | */ |
c35f9726 | 2655 | static int relay_rotate_session_streams( |
f46376a1 | 2656 | const struct lttcomm_relayd_hdr *recv_hdr __attribute__((unused)), |
5312a3ed JG |
2657 | struct relay_connection *conn, |
2658 | const struct lttng_buffer_view *payload) | |
d3ecc550 | 2659 | { |
30b9d5ab | 2660 | int ret = 0; |
c35f9726 | 2661 | uint32_t i; |
5312a3ed | 2662 | ssize_t send_ret; |
c35f9726 | 2663 | enum lttng_error_code reply_code = LTTNG_ERR_UNK; |
d3ecc550 | 2664 | struct relay_session *session = conn->session; |
c35f9726 JG |
2665 | struct lttcomm_relayd_rotate_streams rotate_streams; |
2666 | struct lttcomm_relayd_generic_reply reply = {}; | |
2667 | struct relay_stream *stream = NULL; | |
c35f9726 JG |
2668 | struct lttng_trace_chunk *next_trace_chunk = NULL; |
2669 | struct lttng_buffer_view stream_positions; | |
70626904 JG |
2670 | char chunk_id_buf[MAX_INT_DEC_LEN(uint64_t)]; |
2671 | const char *chunk_id_str = "none"; | |
ce9dbd47 | 2672 | ssize_t header_len; |
d3ecc550 | 2673 | |
d3ecc550 JD |
2674 | if (!session || !conn->version_check_done) { |
2675 | ERR("Trying to rotate a stream before version check"); | |
2676 | ret = -1; | |
2677 | goto end_no_reply; | |
2678 | } | |
2679 | ||
2680 | if (session->major == 2 && session->minor < 11) { | |
2681 | ERR("Unsupported feature before 2.11"); | |
2682 | ret = -1; | |
2683 | goto end_no_reply; | |
2684 | } | |
2685 | ||
ce9dbd47 JG |
2686 | header_len = relay_unpack_rotate_streams_header(payload, &rotate_streams); |
2687 | if (header_len < 0) { | |
d3ecc550 JD |
2688 | ret = -1; |
2689 | goto end_no_reply; | |
2690 | } | |
2691 | ||
c35f9726 JG |
2692 | if (rotate_streams.new_chunk_id.is_set) { |
2693 | /* | |
2694 | * Retrieve the trace chunk the stream must transition to. As | |
2695 | * per the protocol, this chunk should have been created | |
2696 | * before this command is received. | |
2697 | */ | |
2698 | next_trace_chunk = sessiond_trace_chunk_registry_get_chunk( | |
2699 | sessiond_trace_chunk_registry, | |
c5c79321 JG |
2700 | session->sessiond_uuid, |
2701 | conn->session->id_sessiond.is_set ? | |
2702 | conn->session->id_sessiond.value : | |
2703 | conn->session->id, | |
c35f9726 JG |
2704 | rotate_streams.new_chunk_id.value); |
2705 | if (!next_trace_chunk) { | |
c70636a7 | 2706 | char uuid_str[LTTNG_UUID_STR_LEN]; |
c35f9726 JG |
2707 | |
2708 | lttng_uuid_to_str(session->sessiond_uuid, uuid_str); | |
2709 | ERR("Unknown next trace chunk in ROTATE_STREAMS command: sessiond_uuid = {%s}, session_id = %" PRIu64 | |
2710 | ", trace_chunk_id = %" PRIu64, | |
2711 | uuid_str, session->id, | |
2712 | rotate_streams.new_chunk_id.value); | |
2713 | reply_code = LTTNG_ERR_INVALID_PROTOCOL; | |
2714 | ret = -1; | |
2715 | goto end; | |
2716 | } | |
70626904 JG |
2717 | |
2718 | ret = snprintf(chunk_id_buf, sizeof(chunk_id_buf), "%" PRIu64, | |
2719 | rotate_streams.new_chunk_id.value); | |
2720 | if (ret < 0 || ret >= sizeof(chunk_id_buf)) { | |
2721 | chunk_id_str = "formatting error"; | |
2722 | } else { | |
2723 | chunk_id_str = chunk_id_buf; | |
2724 | } | |
d3ecc550 JD |
2725 | } |
2726 | ||
70626904 JG |
2727 | DBG("Rotate %" PRIu32 " streams of session \"%s\" to chunk \"%s\"", |
2728 | rotate_streams.stream_count, session->session_name, | |
2729 | chunk_id_str); | |
2730 | ||
c35f9726 | 2731 | stream_positions = lttng_buffer_view_from_view(payload, |
ce9dbd47 | 2732 | header_len, -1); |
c35f9726 JG |
2733 | if (!stream_positions.data || |
2734 | stream_positions.size < | |
2735 | (rotate_streams.stream_count * | |
2736 | sizeof(struct lttcomm_relayd_stream_rotation_position))) { | |
2737 | reply_code = LTTNG_ERR_INVALID_PROTOCOL; | |
d3ecc550 | 2738 | ret = -1; |
5312a3ed | 2739 | goto end; |
d3ecc550 JD |
2740 | } |
2741 | ||
c35f9726 JG |
2742 | for (i = 0; i < rotate_streams.stream_count; i++) { |
2743 | struct lttcomm_relayd_stream_rotation_position *position_comm = | |
2744 | &((typeof(position_comm)) stream_positions.data)[i]; | |
2745 | const struct lttcomm_relayd_stream_rotation_position pos = { | |
2746 | .stream_id = be64toh(position_comm->stream_id), | |
2747 | .rotate_at_seq_num = be64toh( | |
2748 | position_comm->rotate_at_seq_num), | |
2749 | }; | |
5312a3ed | 2750 | |
c35f9726 JG |
2751 | stream = stream_get_by_id(pos.stream_id); |
2752 | if (!stream) { | |
2753 | reply_code = LTTNG_ERR_INVALID; | |
2754 | ret = -1; | |
2755 | goto end; | |
c6db3843 JG |
2756 | } |
2757 | ||
c35f9726 JG |
2758 | pthread_mutex_lock(&stream->lock); |
2759 | ret = stream_set_pending_rotation(stream, next_trace_chunk, | |
2760 | pos.rotate_at_seq_num); | |
2761 | pthread_mutex_unlock(&stream->lock); | |
2762 | if (ret) { | |
2763 | reply_code = LTTNG_ERR_FILE_CREATION_ERROR; | |
2764 | goto end; | |
c6db3843 | 2765 | } |
c35f9726 JG |
2766 | |
2767 | stream_put(stream); | |
2768 | stream = NULL; | |
d3ecc550 JD |
2769 | } |
2770 | ||
c35f9726 | 2771 | reply_code = LTTNG_OK; |
eaeb64a9 | 2772 | ret = 0; |
d3ecc550 | 2773 | end: |
c35f9726 JG |
2774 | if (stream) { |
2775 | stream_put(stream); | |
d3ecc550 | 2776 | } |
c35f9726 JG |
2777 | |
2778 | reply.ret_code = htobe32((uint32_t) reply_code); | |
d3ecc550 JD |
2779 | send_ret = conn->sock->ops->sendmsg(conn->sock, &reply, |
2780 | sizeof(struct lttcomm_relayd_generic_reply), 0); | |
5312a3ed JG |
2781 | if (send_ret < (ssize_t) sizeof(reply)) { |
2782 | ERR("Failed to send \"rotate session stream\" command reply (ret = %zd)", | |
2783 | send_ret); | |
2784 | ret = -1; | |
d3ecc550 | 2785 | } |
d3ecc550 | 2786 | end_no_reply: |
c35f9726 | 2787 | lttng_trace_chunk_put(next_trace_chunk); |
d3ecc550 JD |
2788 | return ret; |
2789 | } | |
2790 | ||
e5add6d0 JG |
2791 | /* |
2792 | * relay_create_trace_chunk: create a new trace chunk | |
2793 | */ | |
f46376a1 MJ |
2794 | static int relay_create_trace_chunk( |
2795 | const struct lttcomm_relayd_hdr *recv_hdr __attribute__((unused)), | |
e5add6d0 JG |
2796 | struct relay_connection *conn, |
2797 | const struct lttng_buffer_view *payload) | |
2798 | { | |
2799 | int ret = 0; | |
2800 | ssize_t send_ret; | |
2801 | struct relay_session *session = conn->session; | |
2802 | struct lttcomm_relayd_create_trace_chunk *msg; | |
2803 | struct lttcomm_relayd_generic_reply reply = {}; | |
2804 | struct lttng_buffer_view header_view; | |
e5add6d0 JG |
2805 | struct lttng_trace_chunk *chunk = NULL, *published_chunk = NULL; |
2806 | enum lttng_error_code reply_code = LTTNG_OK; | |
2807 | enum lttng_trace_chunk_status chunk_status; | |
a7ceb342 | 2808 | const char *new_path; |
e5add6d0 JG |
2809 | |
2810 | if (!session || !conn->version_check_done) { | |
2811 | ERR("Trying to create a trace chunk before version check"); | |
2812 | ret = -1; | |
2813 | goto end_no_reply; | |
2814 | } | |
2815 | ||
2816 | if (session->major == 2 && session->minor < 11) { | |
2817 | ERR("Chunk creation command is unsupported before 2.11"); | |
2818 | ret = -1; | |
2819 | goto end_no_reply; | |
2820 | } | |
2821 | ||
2822 | header_view = lttng_buffer_view_from_view(payload, 0, sizeof(*msg)); | |
3e6e0df2 | 2823 | if (!lttng_buffer_view_is_valid(&header_view)) { |
e5add6d0 JG |
2824 | ERR("Failed to receive payload of chunk creation command"); |
2825 | ret = -1; | |
2826 | goto end_no_reply; | |
2827 | } | |
2828 | ||
2829 | /* Convert to host endianness. */ | |
2830 | msg = (typeof(msg)) header_view.data; | |
2831 | msg->chunk_id = be64toh(msg->chunk_id); | |
2832 | msg->creation_timestamp = be64toh(msg->creation_timestamp); | |
2833 | msg->override_name_length = be32toh(msg->override_name_length); | |
2834 | ||
8cd15f6a MD |
2835 | pthread_mutex_lock(&conn->session->lock); |
2836 | session->ongoing_rotation = true; | |
a7ceb342 MD |
2837 | if (session->current_trace_chunk && |
2838 | !lttng_trace_chunk_get_name_overridden(session->current_trace_chunk)) { | |
2839 | chunk_status = lttng_trace_chunk_rename_path(session->current_trace_chunk, | |
2840 | DEFAULT_CHUNK_TMP_OLD_DIRECTORY); | |
2841 | if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) { | |
2842 | ERR("Failed to rename old chunk"); | |
2843 | ret = -1; | |
2844 | reply_code = LTTNG_ERR_UNK; | |
2845 | goto end; | |
2846 | } | |
2847 | } | |
a7ceb342 MD |
2848 | if (!session->current_trace_chunk) { |
2849 | if (!session->has_rotated) { | |
2850 | new_path = ""; | |
2851 | } else { | |
2852 | new_path = NULL; | |
2853 | } | |
2854 | } else { | |
2855 | new_path = DEFAULT_CHUNK_TMP_NEW_DIRECTORY; | |
2856 | } | |
e5add6d0 | 2857 | chunk = lttng_trace_chunk_create( |
a7ceb342 | 2858 | msg->chunk_id, msg->creation_timestamp, new_path); |
e5add6d0 JG |
2859 | if (!chunk) { |
2860 | ERR("Failed to create trace chunk in trace chunk creation command"); | |
2861 | ret = -1; | |
2862 | reply_code = LTTNG_ERR_NOMEM; | |
2863 | goto end; | |
2864 | } | |
7145f5e9 | 2865 | lttng_trace_chunk_set_fd_tracker(chunk, the_fd_tracker); |
e5add6d0 JG |
2866 | |
2867 | if (msg->override_name_length) { | |
2868 | const char *name; | |
3e6e0df2 JG |
2869 | const struct lttng_buffer_view chunk_name_view = |
2870 | lttng_buffer_view_from_view(payload, | |
2871 | sizeof(*msg), | |
2872 | msg->override_name_length); | |
2873 | ||
2874 | if (!lttng_buffer_view_is_valid(&chunk_name_view)) { | |
2875 | ERR("Invalid payload of chunk creation command (protocol error): buffer too short for expected name length"); | |
2876 | ret = -1; | |
2877 | reply_code = LTTNG_ERR_INVALID; | |
2878 | goto end; | |
2879 | } | |
e5add6d0 | 2880 | |
e5add6d0 | 2881 | name = chunk_name_view.data; |
3e6e0df2 JG |
2882 | if (name[msg->override_name_length - 1]) { |
2883 | ERR("Invalid payload of chunk creation command (protocol error): name is not null-terminated"); | |
e5add6d0 JG |
2884 | ret = -1; |
2885 | reply_code = LTTNG_ERR_INVALID; | |
2886 | goto end; | |
2887 | } | |
2888 | ||
2889 | chunk_status = lttng_trace_chunk_override_name( | |
2890 | chunk, chunk_name_view.data); | |
2891 | switch (chunk_status) { | |
2892 | case LTTNG_TRACE_CHUNK_STATUS_OK: | |
2893 | break; | |
2894 | case LTTNG_TRACE_CHUNK_STATUS_INVALID_ARGUMENT: | |
2895 | ERR("Failed to set the name of new trace chunk in trace chunk creation command (invalid name)"); | |
2896 | reply_code = LTTNG_ERR_INVALID; | |
2897 | ret = -1; | |
2898 | goto end; | |
2899 | default: | |
2900 | ERR("Failed to set the name of new trace chunk in trace chunk creation command (unknown error)"); | |
2901 | reply_code = LTTNG_ERR_UNK; | |
2902 | ret = -1; | |
2903 | goto end; | |
2904 | } | |
2905 | } | |
2906 | ||
e5add6d0 JG |
2907 | chunk_status = lttng_trace_chunk_set_credentials_current_user(chunk); |
2908 | if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) { | |
2909 | reply_code = LTTNG_ERR_UNK; | |
2910 | ret = -1; | |
2911 | goto end; | |
2912 | } | |
2913 | ||
a0377dfe | 2914 | LTTNG_ASSERT(conn->session->output_directory); |
7ceefac4 JG |
2915 | chunk_status = lttng_trace_chunk_set_as_owner(chunk, |
2916 | conn->session->output_directory); | |
e5add6d0 JG |
2917 | if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) { |
2918 | reply_code = LTTNG_ERR_UNK; | |
2919 | ret = -1; | |
2920 | goto end; | |
2921 | } | |
2922 | ||
2923 | published_chunk = sessiond_trace_chunk_registry_publish_chunk( | |
2924 | sessiond_trace_chunk_registry, | |
2925 | conn->session->sessiond_uuid, | |
c5c79321 JG |
2926 | conn->session->id_sessiond.is_set ? |
2927 | conn->session->id_sessiond.value : | |
2928 | conn->session->id, | |
e5add6d0 JG |
2929 | chunk); |
2930 | if (!published_chunk) { | |
c70636a7 | 2931 | char uuid_str[LTTNG_UUID_STR_LEN]; |
e5add6d0 JG |
2932 | |
2933 | lttng_uuid_to_str(conn->session->sessiond_uuid, uuid_str); | |
2934 | ERR("Failed to publish chunk: sessiond_uuid = %s, session_id = %" PRIu64 ", chunk_id = %" PRIu64, | |
2935 | uuid_str, | |
2936 | conn->session->id, | |
2937 | msg->chunk_id); | |
2938 | ret = -1; | |
2939 | reply_code = LTTNG_ERR_NOMEM; | |
2940 | goto end; | |
2941 | } | |
2942 | ||
62bad3bf JG |
2943 | if (conn->session->pending_closure_trace_chunk) { |
2944 | /* | |
2945 | * Invalid; this means a second create_trace_chunk command was | |
2946 | * received before a close_trace_chunk. | |
2947 | */ | |
2948 | ERR("Invalid trace chunk close command received; a trace chunk is already waiting for a trace chunk close command"); | |
2949 | reply_code = LTTNG_ERR_INVALID_PROTOCOL; | |
2950 | ret = -1; | |
8cd15f6a | 2951 | goto end; |
62bad3bf JG |
2952 | } |
2953 | conn->session->pending_closure_trace_chunk = | |
2954 | conn->session->current_trace_chunk; | |
e5add6d0 | 2955 | conn->session->current_trace_chunk = published_chunk; |
e5add6d0 | 2956 | published_chunk = NULL; |
a7ceb342 MD |
2957 | if (!conn->session->pending_closure_trace_chunk) { |
2958 | session->ongoing_rotation = false; | |
2959 | } | |
e5add6d0 | 2960 | end: |
8cd15f6a | 2961 | pthread_mutex_unlock(&conn->session->lock); |
e5add6d0 JG |
2962 | reply.ret_code = htobe32((uint32_t) reply_code); |
2963 | send_ret = conn->sock->ops->sendmsg(conn->sock, | |
2964 | &reply, | |
2965 | sizeof(struct lttcomm_relayd_generic_reply), | |
2966 | 0); | |
2967 | if (send_ret < (ssize_t) sizeof(reply)) { | |
2968 | ERR("Failed to send \"create trace chunk\" command reply (ret = %zd)", | |
2969 | send_ret); | |
2970 | ret = -1; | |
2971 | } | |
2972 | end_no_reply: | |
2973 | lttng_trace_chunk_put(chunk); | |
2974 | lttng_trace_chunk_put(published_chunk); | |
e5add6d0 JG |
2975 | return ret; |
2976 | } | |
2977 | ||
bbc4768c JG |
2978 | /* |
2979 | * relay_close_trace_chunk: close a trace chunk | |
2980 | */ | |
f46376a1 MJ |
2981 | static int relay_close_trace_chunk( |
2982 | const struct lttcomm_relayd_hdr *recv_hdr __attribute__((unused)), | |
bbc4768c JG |
2983 | struct relay_connection *conn, |
2984 | const struct lttng_buffer_view *payload) | |
2985 | { | |
9898f786 | 2986 | int ret = 0, buf_ret; |
bbc4768c JG |
2987 | ssize_t send_ret; |
2988 | struct relay_session *session = conn->session; | |
2989 | struct lttcomm_relayd_close_trace_chunk *msg; | |
ecd1a12f | 2990 | struct lttcomm_relayd_close_trace_chunk_reply reply = {}; |
bbc4768c JG |
2991 | struct lttng_buffer_view header_view; |
2992 | struct lttng_trace_chunk *chunk = NULL; | |
2993 | enum lttng_error_code reply_code = LTTNG_OK; | |
2994 | enum lttng_trace_chunk_status chunk_status; | |
2995 | uint64_t chunk_id; | |
c35f9726 | 2996 | LTTNG_OPTIONAL(enum lttng_trace_chunk_command_type) close_command = {}; |
bbc4768c | 2997 | time_t close_timestamp; |
ecd1a12f MD |
2998 | char closed_trace_chunk_path[LTTNG_PATH_MAX]; |
2999 | size_t path_length = 0; | |
3000 | const char *chunk_name = NULL; | |
3001 | struct lttng_dynamic_buffer reply_payload; | |
a7ceb342 | 3002 | const char *new_path; |
ecd1a12f MD |
3003 | |
3004 | lttng_dynamic_buffer_init(&reply_payload); | |
bbc4768c JG |
3005 | |
3006 | if (!session || !conn->version_check_done) { | |
3007 | ERR("Trying to close a trace chunk before version check"); | |
3008 | ret = -1; | |
3009 | goto end_no_reply; | |
3010 | } | |
3011 | ||
3012 | if (session->major == 2 && session->minor < 11) { | |
3013 | ERR("Chunk close command is unsupported before 2.11"); | |
3014 | ret = -1; | |
3015 | goto end_no_reply; | |
3016 | } | |
3017 | ||
3018 | header_view = lttng_buffer_view_from_view(payload, 0, sizeof(*msg)); | |
3e6e0df2 | 3019 | if (!lttng_buffer_view_is_valid(&header_view)) { |
bbc4768c JG |
3020 | ERR("Failed to receive payload of chunk close command"); |
3021 | ret = -1; | |
3022 | goto end_no_reply; | |
3023 | } | |
3024 | ||
3025 | /* Convert to host endianness. */ | |
3026 | msg = (typeof(msg)) header_view.data; | |
3027 | chunk_id = be64toh(msg->chunk_id); | |
3028 | close_timestamp = (time_t) be64toh(msg->close_timestamp); | |
ac497a37 SM |
3029 | close_command.value = (lttng_trace_chunk_command_type) be32toh(msg->close_command.value); |
3030 | close_command.is_set = msg->close_command.is_set; | |
bbc4768c JG |
3031 | |
3032 | chunk = sessiond_trace_chunk_registry_get_chunk( | |
3033 | sessiond_trace_chunk_registry, | |
3034 | conn->session->sessiond_uuid, | |
c5c79321 JG |
3035 | conn->session->id_sessiond.is_set ? |
3036 | conn->session->id_sessiond.value : | |
3037 | conn->session->id, | |
bbc4768c JG |
3038 | chunk_id); |
3039 | if (!chunk) { | |
c70636a7 | 3040 | char uuid_str[LTTNG_UUID_STR_LEN]; |
bbc4768c JG |
3041 | |
3042 | lttng_uuid_to_str(conn->session->sessiond_uuid, uuid_str); | |
3043 | ERR("Failed to find chunk to close: sessiond_uuid = %s, session_id = %" PRIu64 ", chunk_id = %" PRIu64, | |
3044 | uuid_str, | |
3045 | conn->session->id, | |
3046 | msg->chunk_id); | |
3047 | ret = -1; | |
3048 | reply_code = LTTNG_ERR_NOMEM; | |
3049 | goto end; | |
3050 | } | |
3051 | ||
62bad3bf | 3052 | pthread_mutex_lock(&session->lock); |
f77a6ec2 MD |
3053 | if (close_command.is_set && |
3054 | close_command.value == LTTNG_TRACE_CHUNK_COMMAND_TYPE_DELETE) { | |
3055 | /* | |
3056 | * Clear command. It is a protocol error to ask for a | |
3057 | * clear on a relay which does not allow it. Querying | |
3058 | * the configuration allows figuring out whether | |
3059 | * clearing is allowed before doing the clear. | |
3060 | */ | |
3061 | if (!opt_allow_clear) { | |
3062 | ret = -1; | |
3063 | reply_code = LTTNG_ERR_INVALID_PROTOCOL; | |
3064 | goto end_unlock_session; | |
3065 | } | |
3066 | } | |
62bad3bf JG |
3067 | if (session->pending_closure_trace_chunk && |
3068 | session->pending_closure_trace_chunk != chunk) { | |
3069 | ERR("Trace chunk close command for session \"%s\" does not target the trace chunk pending closure", | |
3070 | session->session_name); | |
3071 | reply_code = LTTNG_ERR_INVALID_PROTOCOL; | |
3072 | ret = -1; | |
3073 | goto end_unlock_session; | |
3074 | } | |
3075 | ||
a7ceb342 MD |
3076 | if (session->current_trace_chunk && session->current_trace_chunk != chunk && |
3077 | !lttng_trace_chunk_get_name_overridden(session->current_trace_chunk)) { | |
3078 | if (close_command.is_set && | |
3079 | close_command.value == LTTNG_TRACE_CHUNK_COMMAND_TYPE_DELETE && | |
3080 | !session->has_rotated) { | |
3081 | /* New chunk stays in session output directory. */ | |
3082 | new_path = ""; | |
3083 | } else { | |
3084 | /* Use chunk name for new chunk. */ | |
3085 | new_path = NULL; | |
3086 | } | |
3087 | /* Rename new chunk path. */ | |
3088 | chunk_status = lttng_trace_chunk_rename_path(session->current_trace_chunk, | |
3089 | new_path); | |
3090 | if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) { | |
3091 | ret = -1; | |
88188199 | 3092 | goto end_unlock_session; |
a7ceb342 MD |
3093 | } |
3094 | session->ongoing_rotation = false; | |
3095 | } | |
3096 | if ((!close_command.is_set || | |
3097 | close_command.value == LTTNG_TRACE_CHUNK_COMMAND_TYPE_NO_OPERATION) && | |
3098 | !lttng_trace_chunk_get_name_overridden(chunk)) { | |
3099 | const char *old_path; | |
3100 | ||
3101 | if (!session->has_rotated) { | |
3102 | old_path = ""; | |
3103 | } else { | |
3104 | old_path = NULL; | |
3105 | } | |
3106 | /* We need to move back the .tmp_old_chunk to its rightful place. */ | |
3107 | chunk_status = lttng_trace_chunk_rename_path(chunk, old_path); | |
3108 | if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) { | |
3109 | ret = -1; | |
88188199 | 3110 | goto end_unlock_session; |
a7ceb342 MD |
3111 | } |
3112 | } | |
bbc4768c JG |
3113 | chunk_status = lttng_trace_chunk_set_close_timestamp( |
3114 | chunk, close_timestamp); | |
3115 | if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) { | |
3116 | ERR("Failed to set trace chunk close timestamp"); | |
3117 | ret = -1; | |
3118 | reply_code = LTTNG_ERR_UNK; | |
62bad3bf | 3119 | goto end_unlock_session; |
bbc4768c JG |
3120 | } |
3121 | ||
3122 | if (close_command.is_set) { | |
3123 | chunk_status = lttng_trace_chunk_set_close_command( | |
3124 | chunk, close_command.value); | |
3125 | if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) { | |
3126 | ret = -1; | |
3127 | reply_code = LTTNG_ERR_INVALID; | |
62bad3bf | 3128 | goto end_unlock_session; |
bbc4768c JG |
3129 | } |
3130 | } | |
ecd1a12f MD |
3131 | chunk_status = lttng_trace_chunk_get_name(chunk, &chunk_name, NULL); |
3132 | if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) { | |
3133 | ERR("Failed to get chunk name"); | |
3134 | ret = -1; | |
3135 | reply_code = LTTNG_ERR_UNK; | |
3136 | goto end_unlock_session; | |
3137 | } | |
3138 | if (!session->has_rotated && !session->snapshot) { | |
3139 | ret = lttng_strncpy(closed_trace_chunk_path, | |
3140 | session->output_path, | |
3141 | sizeof(closed_trace_chunk_path)); | |
3142 | if (ret) { | |
3143 | ERR("Failed to send trace chunk path: path length of %zu bytes exceeds the maximal allowed length of %zu bytes", | |
3144 | strlen(session->output_path), | |
3145 | sizeof(closed_trace_chunk_path)); | |
3146 | reply_code = LTTNG_ERR_NOMEM; | |
3147 | ret = -1; | |
3148 | goto end_unlock_session; | |
3149 | } | |
3150 | } else { | |
3151 | if (session->snapshot) { | |
3152 | ret = snprintf(closed_trace_chunk_path, | |
3153 | sizeof(closed_trace_chunk_path), | |
3154 | "%s/%s", session->output_path, | |
3155 | chunk_name); | |
3156 | } else { | |
3157 | ret = snprintf(closed_trace_chunk_path, | |
3158 | sizeof(closed_trace_chunk_path), | |
3159 | "%s/" DEFAULT_ARCHIVED_TRACE_CHUNKS_DIRECTORY | |
3160 | "/%s", | |
3161 | session->output_path, chunk_name); | |
3162 | } | |
3163 | if (ret < 0 || ret == sizeof(closed_trace_chunk_path)) { | |
3164 | ERR("Failed to format closed trace chunk resulting path"); | |
3165 | reply_code = ret < 0 ? LTTNG_ERR_UNK : LTTNG_ERR_NOMEM; | |
3166 | ret = -1; | |
3167 | goto end_unlock_session; | |
3168 | } | |
3169 | } | |
489ea154 MD |
3170 | if (close_command.is_set && |
3171 | close_command.value == LTTNG_TRACE_CHUNK_COMMAND_TYPE_MOVE_TO_COMPLETED) { | |
3172 | session->has_rotated = true; | |
3173 | } | |
ecd1a12f MD |
3174 | DBG("Reply chunk path on close: %s", closed_trace_chunk_path); |
3175 | path_length = strlen(closed_trace_chunk_path) + 1; | |
3176 | if (path_length > UINT32_MAX) { | |
3177 | ERR("Closed trace chunk path exceeds the maximal length allowed by the protocol"); | |
3178 | ret = -1; | |
3179 | reply_code = LTTNG_ERR_INVALID_PROTOCOL; | |
3180 | goto end_unlock_session; | |
3181 | } | |
bbc4768c | 3182 | |
c35f9726 JG |
3183 | if (session->current_trace_chunk == chunk) { |
3184 | /* | |
3185 | * After a trace chunk close command, no new streams | |
3186 | * referencing the chunk may be created. Hence, on the | |
3187 | * event that no new trace chunk have been created for | |
3188 | * the session, the reference to the current trace chunk | |
3189 | * is released in order to allow it to be reclaimed when | |
3190 | * the last stream releases its reference to it. | |
3191 | */ | |
3192 | lttng_trace_chunk_put(session->current_trace_chunk); | |
3193 | session->current_trace_chunk = NULL; | |
3194 | } | |
62bad3bf JG |
3195 | lttng_trace_chunk_put(session->pending_closure_trace_chunk); |
3196 | session->pending_closure_trace_chunk = NULL; | |
3197 | end_unlock_session: | |
c35f9726 JG |
3198 | pthread_mutex_unlock(&session->lock); |
3199 | ||
bbc4768c | 3200 | end: |
ecd1a12f MD |
3201 | reply.generic.ret_code = htobe32((uint32_t) reply_code); |
3202 | reply.path_length = htobe32((uint32_t) path_length); | |
9898f786 | 3203 | buf_ret = lttng_dynamic_buffer_append( |
ecd1a12f | 3204 | &reply_payload, &reply, sizeof(reply)); |
9898f786 | 3205 | if (buf_ret) { |
ecd1a12f MD |
3206 | ERR("Failed to append \"close trace chunk\" command reply header to payload buffer"); |
3207 | goto end_no_reply; | |
3208 | } | |
3209 | ||
3210 | if (reply_code == LTTNG_OK) { | |
9898f786 | 3211 | buf_ret = lttng_dynamic_buffer_append(&reply_payload, |
ecd1a12f | 3212 | closed_trace_chunk_path, path_length); |
9898f786 | 3213 | if (buf_ret) { |
ecd1a12f MD |
3214 | ERR("Failed to append \"close trace chunk\" command reply path to payload buffer"); |
3215 | goto end_no_reply; | |
3216 | } | |
3217 | } | |
3218 | ||
bbc4768c | 3219 | send_ret = conn->sock->ops->sendmsg(conn->sock, |
ecd1a12f MD |
3220 | reply_payload.data, |
3221 | reply_payload.size, | |
bbc4768c | 3222 | 0); |
ecd1a12f MD |
3223 | if (send_ret < reply_payload.size) { |
3224 | ERR("Failed to send \"close trace chunk\" command reply of %zu bytes (ret = %zd)", | |
3225 | reply_payload.size, send_ret); | |
bbc4768c | 3226 | ret = -1; |
ecd1a12f | 3227 | goto end_no_reply; |
bbc4768c JG |
3228 | } |
3229 | end_no_reply: | |
3230 | lttng_trace_chunk_put(chunk); | |
ecd1a12f | 3231 | lttng_dynamic_buffer_reset(&reply_payload); |
bbc4768c JG |
3232 | return ret; |
3233 | } | |
3234 | ||
c35f9726 JG |
3235 | /* |
3236 | * relay_trace_chunk_exists: check if a trace chunk exists | |
3237 | */ | |
f46376a1 MJ |
3238 | static int relay_trace_chunk_exists( |
3239 | const struct lttcomm_relayd_hdr *recv_hdr __attribute__((unused)), | |
c35f9726 JG |
3240 | struct relay_connection *conn, |
3241 | const struct lttng_buffer_view *payload) | |
3242 | { | |
3243 | int ret = 0; | |
3244 | ssize_t send_ret; | |
3245 | struct relay_session *session = conn->session; | |
3246 | struct lttcomm_relayd_trace_chunk_exists *msg; | |
3247 | struct lttcomm_relayd_trace_chunk_exists_reply reply = {}; | |
3248 | struct lttng_buffer_view header_view; | |
c35f9726 | 3249 | uint64_t chunk_id; |
6b584c2e | 3250 | bool chunk_exists; |
c35f9726 JG |
3251 | |
3252 | if (!session || !conn->version_check_done) { | |
0f1b1d25 | 3253 | ERR("Trying to check for the presence of a trace chunk before version check"); |
c35f9726 JG |
3254 | ret = -1; |
3255 | goto end_no_reply; | |
3256 | } | |
3257 | ||
3258 | if (session->major == 2 && session->minor < 11) { | |
8a82be4c | 3259 | ERR("Chunk exists command is unsupported before 2.11"); |
c35f9726 JG |
3260 | ret = -1; |
3261 | goto end_no_reply; | |
3262 | } | |
3263 | ||
3264 | header_view = lttng_buffer_view_from_view(payload, 0, sizeof(*msg)); | |
3e6e0df2 | 3265 | if (!lttng_buffer_view_is_valid(&header_view)) { |
8a82be4c | 3266 | ERR("Failed to receive payload of chunk exists command"); |
c35f9726 JG |
3267 | ret = -1; |
3268 | goto end_no_reply; | |
3269 | } | |
3270 | ||
3271 | /* Convert to host endianness. */ | |
3272 | msg = (typeof(msg)) header_view.data; | |
3273 | chunk_id = be64toh(msg->chunk_id); | |
3274 | ||
6b584c2e | 3275 | ret = sessiond_trace_chunk_registry_chunk_exists( |
c35f9726 JG |
3276 | sessiond_trace_chunk_registry, |
3277 | conn->session->sessiond_uuid, | |
3278 | conn->session->id, | |
6b584c2e JG |
3279 | chunk_id, &chunk_exists); |
3280 | /* | |
3281 | * If ret is not 0, send the reply and report the error to the caller. | |
3282 | * It is a protocol (or internal) error and the session/connection | |
3283 | * should be torn down. | |
3284 | */ | |
ac497a37 SM |
3285 | reply.generic.ret_code = htobe32((uint32_t) (ret == 0 ? LTTNG_OK : LTTNG_ERR_INVALID_PROTOCOL)); |
3286 | reply.trace_chunk_exists = ret == 0 ? chunk_exists : 0; | |
3287 | ||
6b584c2e JG |
3288 | send_ret = conn->sock->ops->sendmsg( |
3289 | conn->sock, &reply, sizeof(reply), 0); | |
c35f9726 JG |
3290 | if (send_ret < (ssize_t) sizeof(reply)) { |
3291 | ERR("Failed to send \"create trace chunk\" command reply (ret = %zd)", | |
3292 | send_ret); | |
3293 | ret = -1; | |
3294 | } | |
3295 | end_no_reply: | |
c35f9726 JG |
3296 | return ret; |
3297 | } | |
3298 | ||
8614e600 MD |
3299 | /* |
3300 | * relay_get_configuration: query whether feature is available | |
3301 | */ | |
f46376a1 MJ |
3302 | static int relay_get_configuration( |
3303 | const struct lttcomm_relayd_hdr *recv_hdr __attribute__((unused)), | |
8614e600 MD |
3304 | struct relay_connection *conn, |
3305 | const struct lttng_buffer_view *payload) | |
3306 | { | |
3307 | int ret = 0; | |
3308 | ssize_t send_ret; | |
3309 | struct lttcomm_relayd_get_configuration *msg; | |
3310 | struct lttcomm_relayd_get_configuration_reply reply = {}; | |
3311 | struct lttng_buffer_view header_view; | |
f4c5b127 JR |
3312 | struct lttng_dynamic_buffer buffer; |
3313 | struct lttng_dynamic_buffer extra_payload; | |
8614e600 MD |
3314 | uint64_t query_flags = 0; |
3315 | uint64_t result_flags = 0; | |
3316 | ||
f4c5b127 JR |
3317 | lttng_dynamic_buffer_init(&buffer); |
3318 | lttng_dynamic_buffer_init(&extra_payload); | |
3319 | ||
8614e600 | 3320 | header_view = lttng_buffer_view_from_view(payload, 0, sizeof(*msg)); |
3e6e0df2 | 3321 | if (!lttng_buffer_view_is_valid(&header_view)) { |
8614e600 MD |
3322 | ERR("Failed to receive payload of chunk close command"); |
3323 | ret = -1; | |
3324 | goto end_no_reply; | |
3325 | } | |
3326 | ||
3327 | /* Convert to host endianness. */ | |
3328 | msg = (typeof(msg)) header_view.data; | |
3329 | query_flags = be64toh(msg->query_flags); | |
3330 | ||
3e38c8b3 JR |
3331 | /* FIXME: Do we want to return invalid protocol or do we want to return |
3332 | * an array of lttcomm_relayd_get_configuration_specialized_query_reply | |
3333 | * for each unknown query bit ? | |
3334 | */ | |
f4c5b127 | 3335 | if (query_flags & ~LTTCOMM_RELAYD_CONFIGURATION_QUERY_FLAG_MASK) { |
8614e600 MD |
3336 | ret = LTTNG_ERR_INVALID_PROTOCOL; |
3337 | goto reply; | |
3338 | } | |
f4c5b127 | 3339 | |
8614e600 MD |
3340 | if (opt_allow_clear) { |
3341 | result_flags |= LTTCOMM_RELAYD_CONFIGURATION_FLAG_CLEAR_ALLOWED; | |
3342 | } | |
f4c5b127 JR |
3343 | |
3344 | if (query_flags & LTTCOMM_RELAYD_CONFIGURATION_QUERY_FLAG_SUPPORTED_TRACE_FORMAT) { | |
3345 | uint64_t supported_trace_format = 0; | |
3346 | ||
3347 | supported_trace_format |= LTTCOMM_RELAYD_CONFIGURATION_TRACE_FORMAT_SUPPORTED_CTF1; | |
3348 | ||
3349 | supported_trace_format = htobe64(supported_trace_format); | |
3350 | ||
3351 | lttcomm_relayd_get_configuration_specialized_query_reply s_reply = {}; | |
3352 | s_reply.query_flag = htobe64( | |
3353 | LTTCOMM_RELAYD_CONFIGURATION_QUERY_FLAG_SUPPORTED_TRACE_FORMAT); | |
3354 | s_reply.payload_len = htobe64((uint64_t) sizeof(supported_trace_format)); | |
3355 | lttng_dynamic_buffer_append(&extra_payload, &s_reply, sizeof(s_reply)); | |
3356 | lttng_dynamic_buffer_append(&extra_payload, &supported_trace_format, | |
3357 | sizeof(supported_trace_format)); | |
3358 | } | |
3359 | ||
8614e600 | 3360 | reply: |
f4c5b127 JR |
3361 | reply.generic.ret_code = |
3362 | htobe32((uint32_t) (ret == 0 ? LTTNG_OK : LTTNG_ERR_INVALID_PROTOCOL)); | |
ac497a37 SM |
3363 | reply.relayd_configuration_flags = htobe64(result_flags); |
3364 | ||
f4c5b127 JR |
3365 | lttng_dynamic_buffer_append(&buffer, &reply, sizeof(reply)); |
3366 | lttng_dynamic_buffer_append_buffer(&buffer, &extra_payload); | |
3367 | ||
3368 | send_ret = conn->sock->ops->sendmsg(conn->sock, buffer.data, buffer.size, 0); | |
3369 | if (send_ret < (ssize_t) buffer.size) { | |
3370 | ERR("Failed to send \"get configuration\" command reply (ret = %zd)", send_ret); | |
8614e600 MD |
3371 | ret = -1; |
3372 | } | |
3373 | end_no_reply: | |
f4c5b127 JR |
3374 | lttng_dynamic_buffer_reset(&extra_payload); |
3375 | lttng_dynamic_buffer_reset(&buffer); | |
8614e600 MD |
3376 | return ret; |
3377 | } | |
3378 | ||
5312a3ed JG |
3379 | static int relay_process_control_command(struct relay_connection *conn, |
3380 | const struct lttcomm_relayd_hdr *header, | |
3381 | const struct lttng_buffer_view *payload) | |
b8aa1682 JD |
3382 | { |
3383 | int ret = 0; | |
3384 | ||
00e71031 FD |
3385 | DBG3("Processing \"%s\" command for socket %i", |
3386 | lttcomm_relayd_command_str((lttcomm_relayd_command) header->cmd), | |
3387 | conn->sock->fd); | |
5312a3ed | 3388 | switch (header->cmd) { |
b8aa1682 | 3389 | case RELAYD_CREATE_SESSION: |
5312a3ed | 3390 | ret = relay_create_session(header, conn, payload); |
b8aa1682 | 3391 | break; |
b8aa1682 | 3392 | case RELAYD_ADD_STREAM: |
5312a3ed | 3393 | ret = relay_add_stream(header, conn, payload); |
b8aa1682 JD |
3394 | break; |
3395 | case RELAYD_START_DATA: | |
5312a3ed | 3396 | ret = relay_start(header, conn, payload); |
b8aa1682 JD |
3397 | break; |
3398 | case RELAYD_SEND_METADATA: | |
5312a3ed | 3399 | ret = relay_recv_metadata(header, conn, payload); |
b8aa1682 JD |
3400 | break; |
3401 | case RELAYD_VERSION: | |
5312a3ed | 3402 | ret = relay_send_version(header, conn, payload); |
b8aa1682 | 3403 | break; |
173af62f | 3404 | case RELAYD_CLOSE_STREAM: |
5312a3ed | 3405 | ret = relay_close_stream(header, conn, payload); |
173af62f | 3406 | break; |
6d805429 | 3407 | case RELAYD_DATA_PENDING: |
5312a3ed | 3408 | ret = relay_data_pending(header, conn, payload); |
c8f59ee5 DG |
3409 | break; |
3410 | case RELAYD_QUIESCENT_CONTROL: | |
5312a3ed | 3411 | ret = relay_quiescent_control(header, conn, payload); |
c8f59ee5 | 3412 | break; |
f7079f67 | 3413 | case RELAYD_BEGIN_DATA_PENDING: |
5312a3ed | 3414 | ret = relay_begin_data_pending(header, conn, payload); |
f7079f67 DG |
3415 | break; |
3416 | case RELAYD_END_DATA_PENDING: | |
5312a3ed | 3417 | ret = relay_end_data_pending(header, conn, payload); |
f7079f67 | 3418 | break; |
1c20f0e2 | 3419 | case RELAYD_SEND_INDEX: |
5312a3ed | 3420 | ret = relay_recv_index(header, conn, payload); |
1c20f0e2 | 3421 | break; |
a4baae1b | 3422 | case RELAYD_STREAMS_SENT: |
5312a3ed | 3423 | ret = relay_streams_sent(header, conn, payload); |
a4baae1b | 3424 | break; |
93ec662e | 3425 | case RELAYD_RESET_METADATA: |
5312a3ed | 3426 | ret = relay_reset_metadata(header, conn, payload); |
93ec662e | 3427 | break; |
c35f9726 | 3428 | case RELAYD_ROTATE_STREAMS: |
c35f9726 | 3429 | ret = relay_rotate_session_streams(header, conn, payload); |
d3ecc550 | 3430 | break; |
e5add6d0 | 3431 | case RELAYD_CREATE_TRACE_CHUNK: |
e5add6d0 JG |
3432 | ret = relay_create_trace_chunk(header, conn, payload); |
3433 | break; | |
bbc4768c | 3434 | case RELAYD_CLOSE_TRACE_CHUNK: |
bbc4768c JG |
3435 | ret = relay_close_trace_chunk(header, conn, payload); |
3436 | break; | |
c35f9726 | 3437 | case RELAYD_TRACE_CHUNK_EXISTS: |
c35f9726 JG |
3438 | ret = relay_trace_chunk_exists(header, conn, payload); |
3439 | break; | |
8614e600 | 3440 | case RELAYD_GET_CONFIGURATION: |
8614e600 MD |
3441 | ret = relay_get_configuration(header, conn, payload); |
3442 | break; | |
b8aa1682 JD |
3443 | case RELAYD_UPDATE_SYNC_INFO: |
3444 | default: | |
5312a3ed | 3445 | ERR("Received unknown command (%u)", header->cmd); |
58eb9381 | 3446 | relay_unknown_command(conn); |
b8aa1682 JD |
3447 | ret = -1; |
3448 | goto end; | |
3449 | } | |
3450 | ||
3451 | end: | |
3452 | return ret; | |
3453 | } | |
3454 | ||
5569b118 JG |
3455 | static enum relay_connection_status relay_process_control_receive_payload( |
3456 | struct relay_connection *conn) | |
5312a3ed JG |
3457 | { |
3458 | int ret = 0; | |
5569b118 | 3459 | enum relay_connection_status status = RELAY_CONNECTION_STATUS_OK; |
5312a3ed JG |
3460 | struct lttng_dynamic_buffer *reception_buffer = |
3461 | &conn->protocol.ctrl.reception_buffer; | |
3462 | struct ctrl_connection_state_receive_payload *state = | |
3463 | &conn->protocol.ctrl.state.receive_payload; | |
3464 | struct lttng_buffer_view payload_view; | |
3465 | ||
3466 | if (state->left_to_receive == 0) { | |
3467 | /* Short-circuit for payload-less commands. */ | |
3468 | goto reception_complete; | |
3469 | } | |
3470 | ||
3471 | ret = conn->sock->ops->recvmsg(conn->sock, | |
3472 | reception_buffer->data + state->received, | |
3473 | state->left_to_receive, MSG_DONTWAIT); | |
3474 | if (ret < 0) { | |
942003e5 MJ |
3475 | DIAGNOSTIC_PUSH |
3476 | DIAGNOSTIC_IGNORE_LOGICAL_OP | |
5569b118 | 3477 | if (errno != EAGAIN && errno != EWOULDBLOCK) { |
942003e5 | 3478 | DIAGNOSTIC_POP |
5569b118 JG |
3479 | PERROR("Unable to receive command payload on sock %d", |
3480 | conn->sock->fd); | |
3481 | status = RELAY_CONNECTION_STATUS_ERROR; | |
3482 | } | |
5312a3ed JG |
3483 | goto end; |
3484 | } else if (ret == 0) { | |
3485 | DBG("Socket %d performed an orderly shutdown (received EOF)", conn->sock->fd); | |
5569b118 | 3486 | status = RELAY_CONNECTION_STATUS_CLOSED; |
5312a3ed JG |
3487 | goto end; |
3488 | } | |
3489 | ||
a0377dfe FD |
3490 | LTTNG_ASSERT(ret > 0); |
3491 | LTTNG_ASSERT(ret <= state->left_to_receive); | |
5312a3ed JG |
3492 | |
3493 | state->left_to_receive -= ret; | |
3494 | state->received += ret; | |
3495 | ||
3496 | if (state->left_to_receive > 0) { | |
3497 | /* | |
3498 | * Can't transition to the protocol's next state, wait to | |
3499 | * receive the rest of the header. | |
3500 | */ | |
3501 | DBG3("Partial reception of control connection protocol payload (received %" PRIu64 " bytes, %" PRIu64 " bytes left to receive, fd = %i)", | |
3502 | state->received, state->left_to_receive, | |
3503 | conn->sock->fd); | |
5312a3ed JG |
3504 | goto end; |
3505 | } | |
3506 | ||
3507 | reception_complete: | |
3508 | DBG("Done receiving control command payload: fd = %i, payload size = %" PRIu64 " bytes", | |
3509 | conn->sock->fd, state->received); | |
3510 | /* | |
3511 | * The payload required to process the command has been received. | |
3512 | * A view to the reception buffer is forwarded to the various | |
3513 | * commands and the state of the control is reset on success. | |
3514 | * | |
3515 | * Commands are responsible for sending their reply to the peer. | |
3516 | */ | |
3517 | payload_view = lttng_buffer_view_from_dynamic_buffer(reception_buffer, | |
3518 | 0, -1); | |
3519 | ret = relay_process_control_command(conn, | |
3520 | &state->header, &payload_view); | |
3521 | if (ret < 0) { | |
5569b118 | 3522 | status = RELAY_CONNECTION_STATUS_ERROR; |
5312a3ed JG |
3523 | goto end; |
3524 | } | |
3525 | ||
3526 | ret = connection_reset_protocol_state(conn); | |
5569b118 JG |
3527 | if (ret) { |
3528 | status = RELAY_CONNECTION_STATUS_ERROR; | |
3529 | } | |
5312a3ed | 3530 | end: |
5569b118 | 3531 | return status; |
5312a3ed JG |
3532 | } |
3533 | ||
5569b118 JG |
3534 | static enum relay_connection_status relay_process_control_receive_header( |
3535 | struct relay_connection *conn) | |
5312a3ed JG |
3536 | { |
3537 | int ret = 0; | |
5569b118 | 3538 | enum relay_connection_status status = RELAY_CONNECTION_STATUS_OK; |
5312a3ed JG |
3539 | struct lttcomm_relayd_hdr header; |
3540 | struct lttng_dynamic_buffer *reception_buffer = | |
3541 | &conn->protocol.ctrl.reception_buffer; | |
3542 | struct ctrl_connection_state_receive_header *state = | |
3543 | &conn->protocol.ctrl.state.receive_header; | |
3544 | ||
a0377dfe | 3545 | LTTNG_ASSERT(state->left_to_receive != 0); |
5312a3ed JG |
3546 | |
3547 | ret = conn->sock->ops->recvmsg(conn->sock, | |
3548 | reception_buffer->data + state->received, | |
3549 | state->left_to_receive, MSG_DONTWAIT); | |
3550 | if (ret < 0) { | |
942003e5 MJ |
3551 | DIAGNOSTIC_PUSH |
3552 | DIAGNOSTIC_IGNORE_LOGICAL_OP | |
5569b118 | 3553 | if (errno != EAGAIN && errno != EWOULDBLOCK) { |
942003e5 | 3554 | DIAGNOSTIC_POP |
5569b118 JG |
3555 | PERROR("Unable to receive control command header on sock %d", |
3556 | conn->sock->fd); | |
3557 | status = RELAY_CONNECTION_STATUS_ERROR; | |
3558 | } | |
5312a3ed JG |
3559 | goto end; |
3560 | } else if (ret == 0) { | |
3561 | DBG("Socket %d performed an orderly shutdown (received EOF)", conn->sock->fd); | |
5569b118 | 3562 | status = RELAY_CONNECTION_STATUS_CLOSED; |
5312a3ed JG |
3563 | goto end; |
3564 | } | |
3565 | ||
a0377dfe FD |
3566 | LTTNG_ASSERT(ret > 0); |
3567 | LTTNG_ASSERT(ret <= state->left_to_receive); | |
5312a3ed JG |
3568 | |
3569 | state->left_to_receive -= ret; | |
3570 | state->received += ret; | |
3571 | ||
3572 | if (state->left_to_receive > 0) { | |
3573 | /* | |
3574 | * Can't transition to the protocol's next state, wait to | |
3575 | * receive the rest of the header. | |
3576 | */ | |
3577 | DBG3("Partial reception of control connection protocol header (received %" PRIu64 " bytes, %" PRIu64 " bytes left to receive, fd = %i)", | |
3578 | state->received, state->left_to_receive, | |
3579 | conn->sock->fd); | |
5312a3ed JG |
3580 | goto end; |
3581 | } | |
3582 | ||
3583 | /* Transition to next state: receiving the command's payload. */ | |
3584 | conn->protocol.ctrl.state_id = | |
3585 | CTRL_CONNECTION_STATE_RECEIVE_PAYLOAD; | |
3586 | memcpy(&header, reception_buffer->data, sizeof(header)); | |
3587 | header.circuit_id = be64toh(header.circuit_id); | |
3588 | header.data_size = be64toh(header.data_size); | |
3589 | header.cmd = be32toh(header.cmd); | |
3590 | header.cmd_version = be32toh(header.cmd_version); | |
3591 | memcpy(&conn->protocol.ctrl.state.receive_payload.header, | |
3592 | &header, sizeof(header)); | |
3593 | ||
00e71031 FD |
3594 | DBG("Done receiving control command header: fd = %i, cmd = %s, cmd_version = %" PRIu32 ", payload size = %" PRIu64 " bytes", |
3595 | conn->sock->fd, lttcomm_relayd_command_str((enum lttcomm_relayd_command) header.cmd), | |
3596 | header.cmd_version, header.data_size); | |
5312a3ed | 3597 | |
715e6fb1 | 3598 | if (header.data_size > DEFAULT_NETWORK_RELAYD_CTRL_MAX_PAYLOAD_SIZE) { |
5312a3ed JG |
3599 | ERR("Command header indicates a payload (%" PRIu64 " bytes) that exceeds the maximal payload size allowed on a control connection.", |
3600 | header.data_size); | |
5569b118 | 3601 | status = RELAY_CONNECTION_STATUS_ERROR; |
5312a3ed JG |
3602 | goto end; |
3603 | } | |
3604 | ||
3605 | conn->protocol.ctrl.state.receive_payload.left_to_receive = | |
3606 | header.data_size; | |
3607 | conn->protocol.ctrl.state.receive_payload.received = 0; | |
3608 | ret = lttng_dynamic_buffer_set_size(reception_buffer, | |
3609 | header.data_size); | |
3610 | if (ret) { | |
5569b118 | 3611 | status = RELAY_CONNECTION_STATUS_ERROR; |
5312a3ed JG |
3612 | goto end; |
3613 | } | |
3614 | ||
3615 | if (header.data_size == 0) { | |
3616 | /* | |
3617 | * Manually invoke the next state as the poll loop | |
3618 | * will not wake-up to allow us to proceed further. | |
3619 | */ | |
5569b118 | 3620 | status = relay_process_control_receive_payload(conn); |
5312a3ed JG |
3621 | } |
3622 | end: | |
5569b118 | 3623 | return status; |
5312a3ed JG |
3624 | } |
3625 | ||
3626 | /* | |
3627 | * Process the commands received on the control socket | |
3628 | */ | |
5569b118 JG |
3629 | static enum relay_connection_status relay_process_control( |
3630 | struct relay_connection *conn) | |
5312a3ed | 3631 | { |
5569b118 | 3632 | enum relay_connection_status status; |
5312a3ed JG |
3633 | |
3634 | switch (conn->protocol.ctrl.state_id) { | |
3635 | case CTRL_CONNECTION_STATE_RECEIVE_HEADER: | |
5569b118 | 3636 | status = relay_process_control_receive_header(conn); |
5312a3ed JG |
3637 | break; |
3638 | case CTRL_CONNECTION_STATE_RECEIVE_PAYLOAD: | |
5569b118 | 3639 | status = relay_process_control_receive_payload(conn); |
5312a3ed JG |
3640 | break; |
3641 | default: | |
3642 | ERR("Unknown control connection protocol state encountered."); | |
3643 | abort(); | |
3644 | } | |
3645 | ||
5569b118 | 3646 | return status; |
5312a3ed JG |
3647 | } |
3648 | ||
5569b118 JG |
3649 | static enum relay_connection_status relay_process_data_receive_header( |
3650 | struct relay_connection *conn) | |
b8aa1682 | 3651 | { |
5312a3ed | 3652 | int ret; |
5569b118 | 3653 | enum relay_connection_status status = RELAY_CONNECTION_STATUS_OK; |
5312a3ed JG |
3654 | struct data_connection_state_receive_header *state = |
3655 | &conn->protocol.data.state.receive_header; | |
3656 | struct lttcomm_relayd_data_hdr header; | |
b8aa1682 | 3657 | struct relay_stream *stream; |
5312a3ed | 3658 | |
a0377dfe | 3659 | LTTNG_ASSERT(state->left_to_receive != 0); |
5312a3ed JG |
3660 | |
3661 | ret = conn->sock->ops->recvmsg(conn->sock, | |
3662 | state->header_reception_buffer + state->received, | |
3663 | state->left_to_receive, MSG_DONTWAIT); | |
3664 | if (ret < 0) { | |
942003e5 MJ |
3665 | DIAGNOSTIC_PUSH |
3666 | DIAGNOSTIC_IGNORE_LOGICAL_OP | |
5569b118 | 3667 | if (errno != EAGAIN && errno != EWOULDBLOCK) { |
942003e5 | 3668 | DIAGNOSTIC_POP |
5569b118 JG |
3669 | PERROR("Unable to receive data header on sock %d", conn->sock->fd); |
3670 | status = RELAY_CONNECTION_STATUS_ERROR; | |
3671 | } | |
5312a3ed JG |
3672 | goto end; |
3673 | } else if (ret == 0) { | |
3674 | /* Orderly shutdown. Not necessary to print an error. */ | |
3675 | DBG("Socket %d performed an orderly shutdown (received EOF)", conn->sock->fd); | |
5569b118 | 3676 | status = RELAY_CONNECTION_STATUS_CLOSED; |
b8aa1682 JD |
3677 | goto end; |
3678 | } | |
3679 | ||
a0377dfe FD |
3680 | LTTNG_ASSERT(ret > 0); |
3681 | LTTNG_ASSERT(ret <= state->left_to_receive); | |
5312a3ed JG |
3682 | |
3683 | state->left_to_receive -= ret; | |
3684 | state->received += ret; | |
3685 | ||
3686 | if (state->left_to_receive > 0) { | |
3687 | /* | |
3688 | * Can't transition to the protocol's next state, wait to | |
3689 | * receive the rest of the header. | |
3690 | */ | |
3691 | DBG3("Partial reception of data connection header (received %" PRIu64 " bytes, %" PRIu64 " bytes left to receive, fd = %i)", | |
3692 | state->received, state->left_to_receive, | |
3693 | conn->sock->fd); | |
7591bab1 | 3694 | goto end; |
b8aa1682 | 3695 | } |
b8aa1682 | 3696 | |
5312a3ed JG |
3697 | /* Transition to next state: receiving the payload. */ |
3698 | conn->protocol.data.state_id = DATA_CONNECTION_STATE_RECEIVE_PAYLOAD; | |
173af62f | 3699 | |
5312a3ed JG |
3700 | memcpy(&header, state->header_reception_buffer, sizeof(header)); |
3701 | header.circuit_id = be64toh(header.circuit_id); | |
3702 | header.stream_id = be64toh(header.stream_id); | |
3703 | header.data_size = be32toh(header.data_size); | |
3704 | header.net_seq_num = be64toh(header.net_seq_num); | |
3705 | header.padding_size = be32toh(header.padding_size); | |
3706 | memcpy(&conn->protocol.data.state.receive_payload.header, &header, sizeof(header)); | |
3707 | ||
3708 | conn->protocol.data.state.receive_payload.left_to_receive = | |
3709 | header.data_size; | |
3710 | conn->protocol.data.state.receive_payload.received = 0; | |
3711 | conn->protocol.data.state.receive_payload.rotate_index = false; | |
3712 | ||
3713 | DBG("Received data connection header on fd %i: circuit_id = %" PRIu64 ", stream_id = %" PRIu64 ", data_size = %" PRIu32 ", net_seq_num = %" PRIu64 ", padding_size = %" PRIu32, | |
3714 | conn->sock->fd, header.circuit_id, | |
3715 | header.stream_id, header.data_size, | |
3716 | header.net_seq_num, header.padding_size); | |
3717 | ||
3718 | stream = stream_get_by_id(header.stream_id); | |
3719 | if (!stream) { | |
3720 | DBG("relay_process_data_receive_payload: Cannot find stream %" PRIu64, | |
3721 | header.stream_id); | |
5569b118 JG |
3722 | /* Protocol error. */ |
3723 | status = RELAY_CONNECTION_STATUS_ERROR; | |
5312a3ed JG |
3724 | goto end; |
3725 | } | |
b8aa1682 | 3726 | |
7591bab1 | 3727 | pthread_mutex_lock(&stream->lock); |
c35f9726 JG |
3728 | /* Prepare stream for the reception of a new packet. */ |
3729 | ret = stream_init_packet(stream, header.data_size, | |
3730 | &conn->protocol.data.state.receive_payload.rotate_index); | |
3731 | pthread_mutex_unlock(&stream->lock); | |
3732 | if (ret) { | |
3733 | ERR("Failed to rotate stream output file"); | |
3734 | status = RELAY_CONNECTION_STATUS_ERROR; | |
3735 | goto end_stream_unlock; | |
1c20f0e2 JD |
3736 | } |
3737 | ||
5312a3ed | 3738 | end_stream_unlock: |
5312a3ed JG |
3739 | stream_put(stream); |
3740 | end: | |
5569b118 | 3741 | return status; |
5312a3ed JG |
3742 | } |
3743 | ||
5569b118 JG |
3744 | static enum relay_connection_status relay_process_data_receive_payload( |
3745 | struct relay_connection *conn) | |
5312a3ed JG |
3746 | { |
3747 | int ret; | |
5569b118 | 3748 | enum relay_connection_status status = RELAY_CONNECTION_STATUS_OK; |
5312a3ed JG |
3749 | struct relay_stream *stream; |
3750 | struct data_connection_state_receive_payload *state = | |
3751 | &conn->protocol.data.state.receive_payload; | |
3752 | const size_t chunk_size = RECV_DATA_BUFFER_SIZE; | |
3753 | char data_buffer[chunk_size]; | |
3754 | bool partial_recv = false; | |
3755 | bool new_stream = false, close_requested = false, index_flushed = false; | |
3756 | uint64_t left_to_receive = state->left_to_receive; | |
3757 | struct relay_session *session; | |
3758 | ||
fd0f1e3e JR |
3759 | DBG3("Receiving data for stream id %" PRIu64 " seqnum %" PRIu64 ", %" PRIu64" bytes received, %" PRIu64 " bytes left to receive", |
3760 | state->header.stream_id, state->header.net_seq_num, | |
3761 | state->received, left_to_receive); | |
3762 | ||
5312a3ed JG |
3763 | stream = stream_get_by_id(state->header.stream_id); |
3764 | if (!stream) { | |
5569b118 | 3765 | /* Protocol error. */ |
fd0f1e3e | 3766 | ERR("relay_process_data_receive_payload: cannot find stream %" PRIu64, |
5312a3ed | 3767 | state->header.stream_id); |
5569b118 | 3768 | status = RELAY_CONNECTION_STATUS_ERROR; |
5312a3ed | 3769 | goto end; |
1c20f0e2 JD |
3770 | } |
3771 | ||
5312a3ed JG |
3772 | pthread_mutex_lock(&stream->lock); |
3773 | session = stream->trace->session; | |
fd0f1e3e JR |
3774 | if (!conn->session) { |
3775 | ret = connection_set_session(conn, session); | |
3776 | if (ret) { | |
3777 | status = RELAY_CONNECTION_STATUS_ERROR; | |
3778 | goto end_stream_unlock; | |
3779 | } | |
3780 | } | |
5312a3ed JG |
3781 | |
3782 | /* | |
3783 | * The size of the "chunk" received on any iteration is bounded by: | |
3784 | * - the data left to receive, | |
3785 | * - the data immediately available on the socket, | |
3786 | * - the on-stack data buffer | |
3787 | */ | |
3788 | while (left_to_receive > 0 && !partial_recv) { | |
ff2aa8f0 | 3789 | size_t recv_size = std::min<uint64_t>(left_to_receive, chunk_size); |
c35f9726 | 3790 | struct lttng_buffer_view packet_chunk; |
5312a3ed JG |
3791 | |
3792 | ret = conn->sock->ops->recvmsg(conn->sock, data_buffer, | |
3793 | recv_size, MSG_DONTWAIT); | |
3794 | if (ret < 0) { | |
942003e5 MJ |
3795 | DIAGNOSTIC_PUSH |
3796 | DIAGNOSTIC_IGNORE_LOGICAL_OP | |
5569b118 | 3797 | if (errno != EAGAIN && errno != EWOULDBLOCK) { |
942003e5 | 3798 | DIAGNOSTIC_POP |
5569b118 JG |
3799 | PERROR("Socket %d error", conn->sock->fd); |
3800 | status = RELAY_CONNECTION_STATUS_ERROR; | |
3801 | } | |
0848dba7 | 3802 | goto end_stream_unlock; |
5312a3ed JG |
3803 | } else if (ret == 0) { |
3804 | /* No more data ready to be consumed on socket. */ | |
3805 | DBG3("No more data ready for consumption on data socket of stream id %" PRIu64, | |
3806 | state->header.stream_id); | |
5569b118 | 3807 | status = RELAY_CONNECTION_STATUS_CLOSED; |
5312a3ed JG |
3808 | break; |
3809 | } else if (ret < (int) recv_size) { | |
3810 | /* | |
3811 | * All the data available on the socket has been | |
3812 | * consumed. | |
3813 | */ | |
3814 | partial_recv = true; | |
c35f9726 | 3815 | recv_size = ret; |
0848dba7 MD |
3816 | } |
3817 | ||
c35f9726 JG |
3818 | packet_chunk = lttng_buffer_view_init(data_buffer, |
3819 | 0, recv_size); | |
a0377dfe | 3820 | LTTNG_ASSERT(packet_chunk.data); |
5312a3ed | 3821 | |
c35f9726 JG |
3822 | ret = stream_write(stream, &packet_chunk, 0); |
3823 | if (ret) { | |
0848dba7 | 3824 | ERR("Relay error writing data to file"); |
5569b118 | 3825 | status = RELAY_CONNECTION_STATUS_ERROR; |
0848dba7 MD |
3826 | goto end_stream_unlock; |
3827 | } | |
3828 | ||
5312a3ed JG |
3829 | left_to_receive -= recv_size; |
3830 | state->received += recv_size; | |
3831 | state->left_to_receive = left_to_receive; | |
5312a3ed JG |
3832 | } |
3833 | ||
3834 | if (state->left_to_receive > 0) { | |
3835 | /* | |
3836 | * Did not receive all the data expected, wait for more data to | |
3837 | * become available on the socket. | |
3838 | */ | |
3839 | DBG3("Partial receive on data connection of stream id %" PRIu64 ", %" PRIu64 " bytes received, %" PRIu64 " bytes left to receive", | |
3840 | state->header.stream_id, state->received, | |
3841 | state->left_to_receive); | |
5312a3ed | 3842 | goto end_stream_unlock; |
0848dba7 | 3843 | } |
5ab7344e | 3844 | |
c35f9726 JG |
3845 | ret = stream_write(stream, NULL, state->header.padding_size); |
3846 | if (ret) { | |
5569b118 | 3847 | status = RELAY_CONNECTION_STATUS_ERROR; |
7591bab1 | 3848 | goto end_stream_unlock; |
1d4dfdef | 3849 | } |
5312a3ed | 3850 | |
298a25ca | 3851 | if (session_streams_have_index(session)) { |
c35f9726 JG |
3852 | ret = stream_update_index(stream, state->header.net_seq_num, |
3853 | state->rotate_index, &index_flushed, | |
3854 | state->header.data_size + state->header.padding_size); | |
5312a3ed | 3855 | if (ret < 0) { |
c35f9726 | 3856 | ERR("Failed to update index: stream %" PRIu64 " net_seq_num %" PRIu64 " ret %d", |
5312a3ed JG |
3857 | stream->stream_handle, |
3858 | state->header.net_seq_num, ret); | |
5569b118 | 3859 | status = RELAY_CONNECTION_STATUS_ERROR; |
5312a3ed JG |
3860 | goto end_stream_unlock; |
3861 | } | |
3862 | } | |
3863 | ||
a8f9f353 | 3864 | if (stream->prev_data_seq == -1ULL) { |
c0bae11d MD |
3865 | new_stream = true; |
3866 | } | |
3867 | ||
c35f9726 JG |
3868 | ret = stream_complete_packet(stream, state->header.data_size + |
3869 | state->header.padding_size, state->header.net_seq_num, | |
3870 | index_flushed); | |
3871 | if (ret) { | |
3872 | status = RELAY_CONNECTION_STATUS_ERROR; | |
3873 | goto end_stream_unlock; | |
3874 | } | |
5312a3ed JG |
3875 | |
3876 | /* | |
3877 | * Resetting the protocol state (to RECEIVE_HEADER) will trash the | |
3878 | * contents of *state which are aliased (union) to the same location as | |
3879 | * the new state. Don't use it beyond this point. | |
3880 | */ | |
3881 | connection_reset_protocol_state(conn); | |
3882 | state = NULL; | |
173af62f | 3883 | |
7591bab1 | 3884 | end_stream_unlock: |
bda7c7b9 | 3885 | close_requested = stream->close_requested; |
7591bab1 | 3886 | pthread_mutex_unlock(&stream->lock); |
5312a3ed | 3887 | if (close_requested && left_to_receive == 0) { |
bda7c7b9 JG |
3888 | try_stream_close(stream); |
3889 | } | |
3890 | ||
c0bae11d MD |
3891 | if (new_stream) { |
3892 | pthread_mutex_lock(&session->lock); | |
3893 | uatomic_set(&session->new_streams, 1); | |
3894 | pthread_mutex_unlock(&session->lock); | |
3895 | } | |
5312a3ed | 3896 | |
7591bab1 | 3897 | stream_put(stream); |
b8aa1682 | 3898 | end: |
5569b118 | 3899 | return status; |
b8aa1682 JD |
3900 | } |
3901 | ||
5312a3ed JG |
3902 | /* |
3903 | * relay_process_data: Process the data received on the data socket | |
3904 | */ | |
5569b118 JG |
3905 | static enum relay_connection_status relay_process_data( |
3906 | struct relay_connection *conn) | |
5312a3ed | 3907 | { |
5569b118 | 3908 | enum relay_connection_status status; |
5312a3ed JG |
3909 | |
3910 | switch (conn->protocol.data.state_id) { | |
3911 | case DATA_CONNECTION_STATE_RECEIVE_HEADER: | |
5569b118 | 3912 | status = relay_process_data_receive_header(conn); |
5312a3ed JG |
3913 | break; |
3914 | case DATA_CONNECTION_STATE_RECEIVE_PAYLOAD: | |
5569b118 | 3915 | status = relay_process_data_receive_payload(conn); |
5312a3ed JG |
3916 | break; |
3917 | default: | |
3918 | ERR("Unexpected data connection communication state."); | |
3919 | abort(); | |
3920 | } | |
3921 | ||
5569b118 | 3922 | return status; |
5312a3ed JG |
3923 | } |
3924 | ||
7591bab1 | 3925 | static void cleanup_connection_pollfd(struct lttng_poll_event *events, int pollfd) |
b8aa1682 JD |
3926 | { |
3927 | int ret; | |
3928 | ||
58eb9381 | 3929 | (void) lttng_poll_del(events, pollfd); |
b8aa1682 | 3930 | |
f355467e JG |
3931 | ret = fd_tracker_close_unsuspendable_fd(the_fd_tracker, &pollfd, 1, |
3932 | fd_tracker_util_close_fd, NULL); | |
b8aa1682 JD |
3933 | if (ret < 0) { |
3934 | ERR("Closing pollfd %d", pollfd); | |
3935 | } | |
3936 | } | |
3937 | ||
7591bab1 MD |
3938 | static void relay_thread_close_connection(struct lttng_poll_event *events, |
3939 | int pollfd, struct relay_connection *conn) | |
9d1bbf21 | 3940 | { |
7591bab1 | 3941 | const char *type_str; |
2a174661 | 3942 | |
7591bab1 MD |
3943 | switch (conn->type) { |
3944 | case RELAY_DATA: | |
3945 | type_str = "Data"; | |
3946 | break; | |
3947 | case RELAY_CONTROL: | |
3948 | type_str = "Control"; | |
3949 | break; | |
3950 | case RELAY_VIEWER_COMMAND: | |
3951 | type_str = "Viewer Command"; | |
3952 | break; | |
3953 | case RELAY_VIEWER_NOTIFICATION: | |
3954 | type_str = "Viewer Notification"; | |
3955 | break; | |
3956 | default: | |
3957 | type_str = "Unknown"; | |
9d1bbf21 | 3958 | } |
7591bab1 MD |
3959 | cleanup_connection_pollfd(events, pollfd); |
3960 | connection_put(conn); | |
3961 | DBG("%s connection closed with %d", type_str, pollfd); | |
b8aa1682 JD |
3962 | } |
3963 | ||
3964 | /* | |
3965 | * This thread does the actual work | |
3966 | */ | |
f46376a1 | 3967 | static void *relay_thread_worker(void *data __attribute__((unused))) |
b8aa1682 | 3968 | { |
beaad64c DG |
3969 | int ret, err = -1, last_seen_data_fd = -1; |
3970 | uint32_t nb_fd; | |
b8aa1682 JD |
3971 | struct lttng_poll_event events; |
3972 | struct lttng_ht *relay_connections_ht; | |
b8aa1682 | 3973 | struct lttng_ht_iter iter; |
90e7d72f | 3974 | struct relay_connection *destroy_conn = NULL; |
b8aa1682 JD |
3975 | |
3976 | DBG("[thread] Relay worker started"); | |
3977 | ||
9d1bbf21 MD |
3978 | rcu_register_thread(); |
3979 | ||
55706a7d MD |
3980 | health_register(health_relayd, HEALTH_RELAYD_TYPE_WORKER); |
3981 | ||
9b5e0863 MD |
3982 | if (testpoint(relayd_thread_worker)) { |
3983 | goto error_testpoint; | |
3984 | } | |
3985 | ||
f385ae0a MD |
3986 | health_code_update(); |
3987 | ||
b8aa1682 JD |
3988 | /* table of connections indexed on socket */ |
3989 | relay_connections_ht = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); | |
095a4ae5 MD |
3990 | if (!relay_connections_ht) { |
3991 | goto relay_connections_ht_error; | |
3992 | } | |
b8aa1682 | 3993 | |
e32a0864 | 3994 | ret = create_named_thread_poll_set(&events, 2, "Worker thread epoll"); |
b8aa1682 JD |
3995 | if (ret < 0) { |
3996 | goto error_poll_create; | |
3997 | } | |
3998 | ||
58eb9381 | 3999 | ret = lttng_poll_add(&events, relay_conn_pipe[0], LPOLLIN | LPOLLRDHUP); |
b8aa1682 JD |
4000 | if (ret < 0) { |
4001 | goto error; | |
4002 | } | |
4003 | ||
beaad64c | 4004 | restart: |
b8aa1682 | 4005 | while (1) { |
beaad64c DG |
4006 | int idx = -1, i, seen_control = 0, last_notdel_data_fd = -1; |
4007 | ||
f385ae0a MD |
4008 | health_code_update(); |
4009 | ||
b8aa1682 | 4010 | /* Infinite blocking call, waiting for transmission */ |
87c1611d | 4011 | DBG3("Relayd worker thread polling..."); |
f385ae0a | 4012 | health_poll_entry(); |
b8aa1682 | 4013 | ret = lttng_poll_wait(&events, -1); |
f385ae0a | 4014 | health_poll_exit(); |
b8aa1682 JD |
4015 | if (ret < 0) { |
4016 | /* | |
4017 | * Restart interrupted system call. | |
4018 | */ | |
4019 | if (errno == EINTR) { | |
4020 | goto restart; | |
4021 | } | |
4022 | goto error; | |
4023 | } | |
4024 | ||
0d9c5d77 DG |
4025 | nb_fd = ret; |
4026 | ||
beaad64c | 4027 | /* |
7591bab1 MD |
4028 | * Process control. The control connection is |
4029 | * prioritized so we don't starve it with high | |
4030 | * throughput tracing data on the data connection. | |
beaad64c | 4031 | */ |
b8aa1682 JD |
4032 | for (i = 0; i < nb_fd; i++) { |
4033 | /* Fetch once the poll data */ | |
beaad64c DG |
4034 | uint32_t revents = LTTNG_POLL_GETEV(&events, i); |
4035 | int pollfd = LTTNG_POLL_GETFD(&events, i); | |
b8aa1682 | 4036 | |
f385ae0a MD |
4037 | health_code_update(); |
4038 | ||
b8aa1682 JD |
4039 | /* Thread quit pipe has been closed. Killing thread. */ |
4040 | ret = check_thread_quit_pipe(pollfd, revents); | |
4041 | if (ret) { | |
095a4ae5 MD |
4042 | err = 0; |
4043 | goto exit; | |
b8aa1682 JD |
4044 | } |
4045 | ||
58eb9381 DG |
4046 | /* Inspect the relay conn pipe for new connection */ |
4047 | if (pollfd == relay_conn_pipe[0]) { | |
03e43155 | 4048 | if (revents & LPOLLIN) { |
90e7d72f JG |
4049 | struct relay_connection *conn; |
4050 | ||
58eb9381 | 4051 | ret = lttng_read(relay_conn_pipe[0], &conn, sizeof(conn)); |
b8aa1682 JD |
4052 | if (ret < 0) { |
4053 | goto error; | |
4054 | } | |
73039936 FD |
4055 | ret = lttng_poll_add(&events, |
4056 | conn->sock->fd, | |
58eb9381 | 4057 | LPOLLIN | LPOLLRDHUP); |
73039936 FD |
4058 | if (ret) { |
4059 | ERR("Failed to add new connection file descriptor to poll set"); | |
4060 | goto error; | |
4061 | } | |
7591bab1 | 4062 | connection_ht_add(relay_connections_ht, conn); |
58eb9381 | 4063 | DBG("Connection socket %d added", conn->sock->fd); |
03e43155 MD |
4064 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
4065 | ERR("Relay connection pipe error"); | |
4066 | goto error; | |
4067 | } else { | |
4068 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
4069 | goto error; | |
b8aa1682 | 4070 | } |
58eb9381 | 4071 | } else { |
90e7d72f JG |
4072 | struct relay_connection *ctrl_conn; |
4073 | ||
7591bab1 | 4074 | ctrl_conn = connection_get_by_sock(relay_connections_ht, pollfd); |
58eb9381 | 4075 | /* If not found, there is a synchronization issue. */ |
a0377dfe | 4076 | LTTNG_ASSERT(ctrl_conn); |
58eb9381 | 4077 | |
03e43155 MD |
4078 | if (ctrl_conn->type == RELAY_DATA) { |
4079 | if (revents & LPOLLIN) { | |
beaad64c DG |
4080 | /* |
4081 | * Flag the last seen data fd not deleted. It will be | |
4082 | * used as the last seen fd if any fd gets deleted in | |
4083 | * this first loop. | |
4084 | */ | |
4085 | last_notdel_data_fd = pollfd; | |
4086 | } | |
03e43155 MD |
4087 | goto put_ctrl_connection; |
4088 | } | |
a0377dfe | 4089 | LTTNG_ASSERT(ctrl_conn->type == RELAY_CONTROL); |
03e43155 MD |
4090 | |
4091 | if (revents & LPOLLIN) { | |
5569b118 JG |
4092 | enum relay_connection_status status; |
4093 | ||
4094 | status = relay_process_control(ctrl_conn); | |
4095 | if (status != RELAY_CONNECTION_STATUS_OK) { | |
fd0f1e3e JR |
4096 | /* |
4097 | * On socket error flag the session as aborted to force | |
4098 | * the cleanup of its stream otherwise it can leak | |
4099 | * during the lifetime of the relayd. | |
4100 | * | |
4101 | * This prevents situations in which streams can be | |
4102 | * left opened because an index was received, the | |
4103 | * control connection is closed, and the data | |
4104 | * connection is closed (uncleanly) before the packet's | |
4105 | * data provided. | |
4106 | * | |
4107 | * Since the control connection encountered an error, | |
4108 | * it is okay to be conservative and close the | |
4109 | * session right now as we can't rely on the protocol | |
4110 | * being respected anymore. | |
4111 | */ | |
4112 | if (status == RELAY_CONNECTION_STATUS_ERROR) { | |
4113 | session_abort(ctrl_conn->session); | |
4114 | } | |
4115 | ||
5569b118 | 4116 | /* Clear the connection on error or close. */ |
5312a3ed JG |
4117 | relay_thread_close_connection(&events, |
4118 | pollfd, | |
03e43155 | 4119 | ctrl_conn); |
03e43155 | 4120 | } |
5312a3ed | 4121 | seen_control = 1; |
03e43155 MD |
4122 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
4123 | relay_thread_close_connection(&events, | |
4124 | pollfd, ctrl_conn); | |
4125 | if (last_seen_data_fd == pollfd) { | |
4126 | last_seen_data_fd = last_notdel_data_fd; | |
4127 | } | |
58eb9381 | 4128 | } else { |
03e43155 MD |
4129 | ERR("Unexpected poll events %u for control sock %d", |
4130 | revents, pollfd); | |
4131 | connection_put(ctrl_conn); | |
4132 | goto error; | |
beaad64c | 4133 | } |
03e43155 | 4134 | put_ctrl_connection: |
7591bab1 | 4135 | connection_put(ctrl_conn); |
beaad64c DG |
4136 | } |
4137 | } | |
4138 | ||
4139 | /* | |
4140 | * The last loop handled a control request, go back to poll to make | |
4141 | * sure we prioritise the control socket. | |
4142 | */ | |
4143 | if (seen_control) { | |
4144 | continue; | |
4145 | } | |
4146 | ||
4147 | if (last_seen_data_fd >= 0) { | |
4148 | for (i = 0; i < nb_fd; i++) { | |
4149 | int pollfd = LTTNG_POLL_GETFD(&events, i); | |
f385ae0a MD |
4150 | |
4151 | health_code_update(); | |
4152 | ||
beaad64c DG |
4153 | if (last_seen_data_fd == pollfd) { |
4154 | idx = i; | |
4155 | break; | |
4156 | } | |
4157 | } | |
4158 | } | |
4159 | ||
4160 | /* Process data connection. */ | |
4161 | for (i = idx + 1; i < nb_fd; i++) { | |
4162 | /* Fetch the poll data. */ | |
4163 | uint32_t revents = LTTNG_POLL_GETEV(&events, i); | |
4164 | int pollfd = LTTNG_POLL_GETFD(&events, i); | |
90e7d72f | 4165 | struct relay_connection *data_conn; |
beaad64c | 4166 | |
f385ae0a MD |
4167 | health_code_update(); |
4168 | ||
fd20dac9 MD |
4169 | if (!revents) { |
4170 | /* No activity for this FD (poll implementation). */ | |
4171 | continue; | |
4172 | } | |
4173 | ||
beaad64c | 4174 | /* Skip the command pipe. It's handled in the first loop. */ |
58eb9381 | 4175 | if (pollfd == relay_conn_pipe[0]) { |
beaad64c DG |
4176 | continue; |
4177 | } | |
4178 | ||
7591bab1 | 4179 | data_conn = connection_get_by_sock(relay_connections_ht, pollfd); |
90e7d72f | 4180 | if (!data_conn) { |
fd20dac9 | 4181 | /* Skip it. Might be removed before. */ |
fd20dac9 MD |
4182 | continue; |
4183 | } | |
03e43155 MD |
4184 | if (data_conn->type == RELAY_CONTROL) { |
4185 | goto put_data_connection; | |
4186 | } | |
a0377dfe | 4187 | LTTNG_ASSERT(data_conn->type == RELAY_DATA); |
fd20dac9 MD |
4188 | |
4189 | if (revents & LPOLLIN) { | |
5569b118 JG |
4190 | enum relay_connection_status status; |
4191 | ||
4192 | status = relay_process_data(data_conn); | |
4193 | /* Connection closed or error. */ | |
4194 | if (status != RELAY_CONNECTION_STATUS_OK) { | |
fd0f1e3e JR |
4195 | /* |
4196 | * On socket error flag the session as aborted to force | |
4197 | * the cleanup of its stream otherwise it can leak | |
4198 | * during the lifetime of the relayd. | |
4199 | * | |
4200 | * This prevents situations in which streams can be | |
4201 | * left opened because an index was received, the | |
4202 | * control connection is closed, and the data | |
4203 | * connection is closed (uncleanly) before the packet's | |
4204 | * data provided. | |
4205 | * | |
4206 | * Since the data connection encountered an error, | |
4207 | * it is okay to be conservative and close the | |
4208 | * session right now as we can't rely on the protocol | |
4209 | * being respected anymore. | |
4210 | */ | |
4211 | if (status == RELAY_CONNECTION_STATUS_ERROR) { | |
4212 | session_abort(data_conn->session); | |
4213 | } | |
7591bab1 | 4214 | relay_thread_close_connection(&events, pollfd, |
03e43155 | 4215 | data_conn); |
fd20dac9 MD |
4216 | /* |
4217 | * Every goto restart call sets the last seen fd where | |
4218 | * here we don't really care since we gracefully | |
4219 | * continue the loop after the connection is deleted. | |
4220 | */ | |
4221 | } else { | |
4222 | /* Keep last seen port. */ | |
4223 | last_seen_data_fd = pollfd; | |
7591bab1 | 4224 | connection_put(data_conn); |
fd20dac9 | 4225 | goto restart; |
b8aa1682 | 4226 | } |
03e43155 MD |
4227 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
4228 | relay_thread_close_connection(&events, pollfd, | |
4229 | data_conn); | |
4230 | } else { | |
4231 | ERR("Unknown poll events %u for data sock %d", | |
4232 | revents, pollfd); | |
b8aa1682 | 4233 | } |
03e43155 | 4234 | put_data_connection: |
7591bab1 | 4235 | connection_put(data_conn); |
b8aa1682 | 4236 | } |
beaad64c | 4237 | last_seen_data_fd = -1; |
b8aa1682 JD |
4238 | } |
4239 | ||
f385ae0a MD |
4240 | /* Normal exit, no error */ |
4241 | ret = 0; | |
4242 | ||
095a4ae5 | 4243 | exit: |
b8aa1682 | 4244 | error: |
71efa8ef | 4245 | /* Cleanup remaining connection object. */ |
9d1bbf21 | 4246 | rcu_read_lock(); |
90e7d72f JG |
4247 | cds_lfht_for_each_entry(relay_connections_ht->ht, &iter.iter, |
4248 | destroy_conn, | |
58eb9381 | 4249 | sock_n.node) { |
f385ae0a | 4250 | health_code_update(); |
98ba050e | 4251 | |
fd0f1e3e | 4252 | session_abort(destroy_conn->session); |
98ba050e | 4253 | |
7591bab1 MD |
4254 | /* |
4255 | * No need to grab another ref, because we own | |
4256 | * destroy_conn. | |
4257 | */ | |
4258 | relay_thread_close_connection(&events, destroy_conn->sock->fd, | |
4259 | destroy_conn); | |
b8aa1682 | 4260 | } |
94d49140 | 4261 | rcu_read_unlock(); |
7591bab1 | 4262 | |
e32a0864 | 4263 | (void) fd_tracker_util_poll_clean(the_fd_tracker, &events); |
7d2f7452 | 4264 | error_poll_create: |
b8aa1682 | 4265 | lttng_ht_destroy(relay_connections_ht); |
095a4ae5 | 4266 | relay_connections_ht_error: |
58eb9381 | 4267 | /* Close relay conn pipes */ |
726b2396 JG |
4268 | (void) fd_tracker_util_pipe_close(the_fd_tracker, |
4269 | relay_conn_pipe); | |
095a4ae5 MD |
4270 | if (err) { |
4271 | DBG("Thread exited with error"); | |
4272 | } | |
b8aa1682 | 4273 | DBG("Worker thread cleanup complete"); |
9b5e0863 | 4274 | error_testpoint: |
f385ae0a MD |
4275 | if (err) { |
4276 | health_error(); | |
4277 | ERR("Health error occurred in %s", __func__); | |
4278 | } | |
4279 | health_unregister(health_relayd); | |
9d1bbf21 | 4280 | rcu_unregister_thread(); |
b4aacfdc | 4281 | lttng_relay_stop_threads(); |
b8aa1682 JD |
4282 | return NULL; |
4283 | } | |
4284 | ||
4285 | /* | |
4286 | * Create the relay command pipe to wake thread_manage_apps. | |
4287 | * Closed in cleanup(). | |
4288 | */ | |
58eb9381 | 4289 | static int create_relay_conn_pipe(void) |
b8aa1682 | 4290 | { |
726b2396 JG |
4291 | return fd_tracker_util_pipe_open_cloexec(the_fd_tracker, |
4292 | "Relayd connection pipe", relay_conn_pipe); | |
b8aa1682 JD |
4293 | } |
4294 | ||
f46376a1 | 4295 | static int stdio_open(void *data __attribute__((unused)), int *fds) |
9c256b01 JG |
4296 | { |
4297 | fds[0] = fileno(stdout); | |
4298 | fds[1] = fileno(stderr); | |
4299 | return 0; | |
4300 | } | |
4301 | ||
9c256b01 JG |
4302 | static int track_stdio(void) |
4303 | { | |
4304 | int fds[2]; | |
4305 | const char *names[] = { "stdout", "stderr" }; | |
4306 | ||
4307 | return fd_tracker_open_unsuspendable_fd(the_fd_tracker, fds, | |
4308 | names, 2, stdio_open, NULL); | |
4309 | } | |
4310 | ||
b8aa1682 JD |
4311 | /* |
4312 | * main | |
4313 | */ | |
4314 | int main(int argc, char **argv) | |
4315 | { | |
00e3b7f1 | 4316 | bool thread_is_rcu_registered = false; |
178a0557 | 4317 | int ret = 0, retval = 0; |
b8aa1682 | 4318 | void *status; |
f7c3ffd7 | 4319 | char *unlinked_file_directory_path = NULL, *output_path = NULL; |
b8aa1682 | 4320 | |
2a10de3b JR |
4321 | /* Parse environment variables */ |
4322 | ret = parse_env_options(); | |
4323 | if (ret) { | |
4324 | retval = -1; | |
4325 | goto exit_options; | |
4326 | } | |
4327 | ||
4328 | /* | |
4329 | * Parse arguments. | |
4330 | * Command line arguments overwrite environment. | |
4331 | */ | |
b8aa1682 | 4332 | progname = argv[0]; |
178a0557 MD |
4333 | if (set_options(argc, argv)) { |
4334 | retval = -1; | |
4335 | goto exit_options; | |
b8aa1682 JD |
4336 | } |
4337 | ||
178a0557 MD |
4338 | if (set_signal_handler()) { |
4339 | retval = -1; | |
4340 | goto exit_options; | |
b8aa1682 JD |
4341 | } |
4342 | ||
a3bc3918 JR |
4343 | relayd_config_log(); |
4344 | ||
4345 | if (opt_print_version) { | |
4346 | print_version(); | |
4347 | retval = 0; | |
4348 | goto exit_options; | |
4349 | } | |
4350 | ||
c0407718 JG |
4351 | ret = fclose(stdin); |
4352 | if (ret) { | |
4353 | PERROR("Failed to close stdin"); | |
4354 | goto exit_options; | |
4355 | } | |
4356 | ||
35ab25e5 MD |
4357 | DBG("Clear command %s", opt_allow_clear ? "allowed" : "disallowed"); |
4358 | ||
4d513a50 DG |
4359 | /* Try to create directory if -o, --output is specified. */ |
4360 | if (opt_output_path) { | |
994fa64f DG |
4361 | if (*opt_output_path != '/') { |
4362 | ERR("Please specify an absolute path for -o, --output PATH"); | |
178a0557 MD |
4363 | retval = -1; |
4364 | goto exit_options; | |
994fa64f DG |
4365 | } |
4366 | ||
d77dded2 JG |
4367 | ret = utils_mkdir_recursive(opt_output_path, S_IRWXU | S_IRWXG, |
4368 | -1, -1); | |
4d513a50 DG |
4369 | if (ret < 0) { |
4370 | ERR("Unable to create %s", opt_output_path); | |
178a0557 MD |
4371 | retval = -1; |
4372 | goto exit_options; | |
4d513a50 DG |
4373 | } |
4374 | } | |
4375 | ||
b8aa1682 | 4376 | /* Daemonize */ |
b5218ffb | 4377 | if (opt_daemon || opt_background) { |
3fd27398 MD |
4378 | ret = lttng_daemonize(&child_ppid, &recv_child_signal, |
4379 | !opt_background); | |
b8aa1682 | 4380 | if (ret < 0) { |
178a0557 MD |
4381 | retval = -1; |
4382 | goto exit_options; | |
b8aa1682 | 4383 | } |
3fd27398 MD |
4384 | } |
4385 | ||
ce9ee1fb JR |
4386 | if (opt_working_directory) { |
4387 | ret = utils_change_working_directory(opt_working_directory); | |
4388 | if (ret) { | |
4389 | /* All errors are already logged. */ | |
4390 | goto exit_options; | |
4391 | } | |
4392 | } | |
4393 | ||
23c8ff50 JG |
4394 | sessiond_trace_chunk_registry = sessiond_trace_chunk_registry_create(); |
4395 | if (!sessiond_trace_chunk_registry) { | |
4396 | ERR("Failed to initialize session daemon trace chunk registry"); | |
4397 | retval = -1; | |
794e2e5f | 4398 | goto exit_options; |
23c8ff50 JG |
4399 | } |
4400 | ||
00e3b7f1 JG |
4401 | /* |
4402 | * The RCU thread registration (and use, through the fd-tracker's | |
4403 | * creation) is done after the daemonization to allow us to not | |
4404 | * deal with liburcu's fork() management as the call RCU needs to | |
4405 | * be restored. | |
4406 | */ | |
4407 | rcu_register_thread(); | |
4408 | thread_is_rcu_registered = true; | |
4409 | ||
f7c3ffd7 JG |
4410 | output_path = create_output_path(""); |
4411 | if (!output_path) { | |
4412 | ERR("Failed to get output path"); | |
4413 | retval = -1; | |
4414 | goto exit_options; | |
4415 | } | |
4416 | ret = asprintf(&unlinked_file_directory_path, "%s/%s", output_path, | |
4417 | DEFAULT_UNLINKED_FILES_DIRECTORY); | |
4418 | free(output_path); | |
4419 | if (ret < 0) { | |
4420 | ERR("Failed to format unlinked file directory path"); | |
4421 | retval = -1; | |
4422 | goto exit_options; | |
4423 | } | |
4424 | the_fd_tracker = fd_tracker_create( | |
4425 | unlinked_file_directory_path, lttng_opt_fd_pool_size); | |
4426 | free(unlinked_file_directory_path); | |
00e3b7f1 JG |
4427 | if (!the_fd_tracker) { |
4428 | retval = -1; | |
4429 | goto exit_options; | |
4430 | } | |
4431 | ||
9c256b01 JG |
4432 | ret = track_stdio(); |
4433 | if (ret) { | |
4434 | retval = -1; | |
4435 | goto exit_options; | |
4436 | } | |
4437 | ||
178a0557 MD |
4438 | /* Initialize thread health monitoring */ |
4439 | health_relayd = health_app_create(NR_HEALTH_RELAYD_TYPES); | |
4440 | if (!health_relayd) { | |
4441 | PERROR("health_app_create error"); | |
4442 | retval = -1; | |
794e2e5f | 4443 | goto exit_options; |
178a0557 MD |
4444 | } |
4445 | ||
3fd27398 | 4446 | /* Create thread quit pipe */ |
178a0557 MD |
4447 | if (init_thread_quit_pipe()) { |
4448 | retval = -1; | |
794e2e5f | 4449 | goto exit_options; |
b8aa1682 JD |
4450 | } |
4451 | ||
b8aa1682 | 4452 | /* Setup the thread apps communication pipe. */ |
178a0557 MD |
4453 | if (create_relay_conn_pipe()) { |
4454 | retval = -1; | |
794e2e5f | 4455 | goto exit_options; |
b8aa1682 JD |
4456 | } |
4457 | ||
4458 | /* Init relay command queue. */ | |
8bdee6e2 | 4459 | cds_wfcq_init(&relay_conn_queue.head, &relay_conn_queue.tail); |
b8aa1682 | 4460 | |
554831e7 MD |
4461 | /* Initialize communication library */ |
4462 | lttcomm_init(); | |
87e45c13 | 4463 | lttcomm_inet_init(); |
554831e7 | 4464 | |
d3e2ba59 | 4465 | /* tables of sessions indexed by session ID */ |
7591bab1 MD |
4466 | sessions_ht = lttng_ht_new(0, LTTNG_HT_TYPE_U64); |
4467 | if (!sessions_ht) { | |
178a0557 | 4468 | retval = -1; |
794e2e5f | 4469 | goto exit_options; |
d3e2ba59 JD |
4470 | } |
4471 | ||
4472 | /* tables of streams indexed by stream ID */ | |
2a174661 | 4473 | relay_streams_ht = lttng_ht_new(0, LTTNG_HT_TYPE_U64); |
d3e2ba59 | 4474 | if (!relay_streams_ht) { |
178a0557 | 4475 | retval = -1; |
794e2e5f | 4476 | goto exit_options; |
d3e2ba59 JD |
4477 | } |
4478 | ||
4479 | /* tables of streams indexed by stream ID */ | |
92c6ca54 DG |
4480 | viewer_streams_ht = lttng_ht_new(0, LTTNG_HT_TYPE_U64); |
4481 | if (!viewer_streams_ht) { | |
178a0557 | 4482 | retval = -1; |
794e2e5f | 4483 | goto exit_options; |
55706a7d MD |
4484 | } |
4485 | ||
bcee2b96 | 4486 | ret = init_health_quit_pipe(); |
178a0557 MD |
4487 | if (ret) { |
4488 | retval = -1; | |
794e2e5f | 4489 | goto exit_options; |
65931c8b MD |
4490 | } |
4491 | ||
4492 | /* Create thread to manage the client socket */ | |
1a1a34b4 | 4493 | ret = pthread_create(&health_thread, default_pthread_attr(), |
19708280 | 4494 | thread_manage_health_relayd, (void *) NULL); |
178a0557 MD |
4495 | if (ret) { |
4496 | errno = ret; | |
65931c8b | 4497 | PERROR("pthread_create health"); |
178a0557 | 4498 | retval = -1; |
794e2e5f | 4499 | goto exit_options; |
65931c8b MD |
4500 | } |
4501 | ||
b8aa1682 | 4502 | /* Setup the dispatcher thread */ |
1a1a34b4 | 4503 | ret = pthread_create(&dispatcher_thread, default_pthread_attr(), |
b8aa1682 | 4504 | relay_thread_dispatcher, (void *) NULL); |
178a0557 MD |
4505 | if (ret) { |
4506 | errno = ret; | |
b8aa1682 | 4507 | PERROR("pthread_create dispatcher"); |
178a0557 MD |
4508 | retval = -1; |
4509 | goto exit_dispatcher_thread; | |
b8aa1682 JD |
4510 | } |
4511 | ||
4512 | /* Setup the worker thread */ | |
1a1a34b4 | 4513 | ret = pthread_create(&worker_thread, default_pthread_attr(), |
7591bab1 | 4514 | relay_thread_worker, NULL); |
178a0557 MD |
4515 | if (ret) { |
4516 | errno = ret; | |
b8aa1682 | 4517 | PERROR("pthread_create worker"); |
178a0557 MD |
4518 | retval = -1; |
4519 | goto exit_worker_thread; | |
b8aa1682 JD |
4520 | } |
4521 | ||
4522 | /* Setup the listener thread */ | |
1a1a34b4 | 4523 | ret = pthread_create(&listener_thread, default_pthread_attr(), |
b8aa1682 | 4524 | relay_thread_listener, (void *) NULL); |
178a0557 MD |
4525 | if (ret) { |
4526 | errno = ret; | |
b8aa1682 | 4527 | PERROR("pthread_create listener"); |
178a0557 MD |
4528 | retval = -1; |
4529 | goto exit_listener_thread; | |
b8aa1682 JD |
4530 | } |
4531 | ||
7591bab1 | 4532 | ret = relayd_live_create(live_uri); |
178a0557 | 4533 | if (ret) { |
d3e2ba59 | 4534 | ERR("Starting live viewer threads"); |
178a0557 | 4535 | retval = -1; |
50138f51 | 4536 | goto exit_live; |
d3e2ba59 JD |
4537 | } |
4538 | ||
178a0557 MD |
4539 | /* |
4540 | * This is where we start awaiting program completion (e.g. through | |
4541 | * signal that asks threads to teardown). | |
4542 | */ | |
4543 | ||
4544 | ret = relayd_live_join(); | |
4545 | if (ret) { | |
4546 | retval = -1; | |
4547 | } | |
50138f51 | 4548 | exit_live: |
178a0557 | 4549 | |
b8aa1682 | 4550 | ret = pthread_join(listener_thread, &status); |
178a0557 MD |
4551 | if (ret) { |
4552 | errno = ret; | |
4553 | PERROR("pthread_join listener_thread"); | |
4554 | retval = -1; | |
b8aa1682 JD |
4555 | } |
4556 | ||
178a0557 | 4557 | exit_listener_thread: |
b8aa1682 | 4558 | ret = pthread_join(worker_thread, &status); |
178a0557 MD |
4559 | if (ret) { |
4560 | errno = ret; | |
4561 | PERROR("pthread_join worker_thread"); | |
4562 | retval = -1; | |
b8aa1682 JD |
4563 | } |
4564 | ||
178a0557 | 4565 | exit_worker_thread: |
b8aa1682 | 4566 | ret = pthread_join(dispatcher_thread, &status); |
178a0557 MD |
4567 | if (ret) { |
4568 | errno = ret; | |
4569 | PERROR("pthread_join dispatcher_thread"); | |
4570 | retval = -1; | |
b8aa1682 | 4571 | } |
178a0557 | 4572 | exit_dispatcher_thread: |
42415026 | 4573 | |
65931c8b | 4574 | ret = pthread_join(health_thread, &status); |
178a0557 MD |
4575 | if (ret) { |
4576 | errno = ret; | |
4577 | PERROR("pthread_join health_thread"); | |
4578 | retval = -1; | |
65931c8b | 4579 | } |
178a0557 | 4580 | exit_options: |
4d62fbf8 MD |
4581 | /* |
4582 | * Wait for all pending call_rcu work to complete before tearing | |
4583 | * down data structures. call_rcu worker may be trying to | |
4584 | * perform lookups in those structures. | |
4585 | */ | |
4586 | rcu_barrier(); | |
7591bab1 MD |
4587 | relayd_cleanup(); |
4588 | ||
4589 | /* Ensure all prior call_rcu are done. */ | |
4590 | rcu_barrier(); | |
d3e2ba59 | 4591 | |
00e3b7f1 JG |
4592 | if (thread_is_rcu_registered) { |
4593 | rcu_unregister_thread(); | |
4594 | } | |
4595 | ||
178a0557 | 4596 | if (!retval) { |
b8aa1682 | 4597 | exit(EXIT_SUCCESS); |
178a0557 MD |
4598 | } else { |
4599 | exit(EXIT_FAILURE); | |
b8aa1682 | 4600 | } |
b8aa1682 | 4601 | } |