Commit | Line | Data |
---|---|---|
0475c50c | 1 | /* |
ab5be9fa MJ |
2 | * Copyright (C) 2013 David Goulet <dgoulet@efficios.com> |
3 | * Copyright (C) 2016 Jérémie Galarneau <jeremie.galarneau@efficios.com> | |
0475c50c | 4 | * |
ab5be9fa | 5 | * SPDX-License-Identifier: GPL-2.0-only |
0475c50c | 6 | * |
0475c50c DG |
7 | */ |
8 | ||
6c1c0768 | 9 | #define _LGPL_SOURCE |
f20baf8e | 10 | #include <urcu/uatomic.h> |
bdf64013 | 11 | #include <urcu/rculist.h> |
0475c50c | 12 | |
44760c20 | 13 | #include <lttng/event-rule/event-rule.h> |
c9e313bc | 14 | #include <lttng/event-rule/event-rule-internal.hpp> |
695f7044 JR |
15 | #include <lttng/event-rule/jul-logging.h> |
16 | #include <lttng/event-rule/log4j-logging.h> | |
17 | #include <lttng/event-rule/python-logging.h> | |
44760c20 | 18 | #include <lttng/condition/condition.h> |
670a26e4 | 19 | #include <lttng/condition/event-rule-matches.h> |
c9e313bc SM |
20 | #include <lttng/domain-internal.hpp> |
21 | #include <lttng/log-level-rule-internal.hpp> | |
44760c20 | 22 | |
c9e313bc SM |
23 | #include <common/common.hpp> |
24 | #include <common/sessiond-comm/agent.hpp> | |
0475c50c | 25 | |
c9e313bc | 26 | #include <common/compat/endian.hpp> |
f263b7fd | 27 | |
c9e313bc SM |
28 | #include "agent.hpp" |
29 | #include "ust-app.hpp" | |
30 | #include "utils.hpp" | |
31 | #include "common/error.hpp" | |
23c2bd47 | 32 | |
695f7044 JR |
33 | typedef enum lttng_event_rule_status (*event_rule_logging_get_name_pattern)( |
34 | const struct lttng_event_rule *rule, const char **pattern); | |
35 | typedef enum lttng_event_rule_status (*event_rule_logging_get_log_level_rule)( | |
36 | const struct lttng_event_rule *rule, | |
37 | const struct lttng_log_level_rule **log_level_rule); | |
38 | ||
bdf64013 JG |
39 | /* |
40 | * Agent application context representation. | |
41 | */ | |
f1494934 | 42 | namespace { |
bdf64013 JG |
43 | struct agent_app_ctx { |
44 | char *provider_name; | |
45 | char *ctx_name; | |
46 | ||
47 | /* agent_app_ctx are part of the agent app_ctx_list. */ | |
48 | struct cds_list_head list_node; | |
49 | ||
50 | /* For call_rcu teardown. */ | |
51 | struct rcu_head rcu_node; | |
52 | }; | |
f1494934 | 53 | } /* namespace */ |
bdf64013 | 54 | |
23c2bd47 JG |
55 | /* |
56 | * Human readable agent return code. | |
57 | */ | |
7966af57 SM |
58 | static |
59 | const char *lttcomm_agent_ret_code_str(lttcomm_agent_ret_code code) | |
60 | { | |
61 | switch (code) { | |
62 | case AGENT_RET_CODE_SUCCESS: | |
63 | return "Success"; | |
64 | case AGENT_RET_CODE_INVALID: | |
65 | return "Invalid command"; | |
66 | case AGENT_RET_CODE_UNKNOWN_NAME: | |
67 | return "Unknown logger name"; | |
68 | default: | |
69 | return "Unknown code"; | |
70 | } | |
23c2bd47 JG |
71 | }; |
72 | ||
73 | static | |
74 | void log_reply_code(uint32_t in_reply_ret_code) | |
75 | { | |
76 | int level = PRINT_DBG3; | |
77 | /* | |
78 | * reply_ret_code and in_reply_ret_code are kept separate to have a | |
79 | * sanitized value (used to retrieve the human readable string) and the | |
80 | * original value which is logged as-is. | |
81 | */ | |
82 | uint32_t reply_ret_code = in_reply_ret_code; | |
83 | ||
84 | if (reply_ret_code < AGENT_RET_CODE_SUCCESS || | |
85 | reply_ret_code >= AGENT_RET_CODE_NR) { | |
86 | reply_ret_code = AGENT_RET_CODE_NR; | |
87 | level = PRINT_ERR; | |
88 | } | |
89 | ||
7966af57 SM |
90 | LOG(level, "Agent replied with retcode: %s (%" PRIu32 ")", |
91 | lttcomm_agent_ret_code_str((lttcomm_agent_ret_code) reply_ret_code), | |
23c2bd47 JG |
92 | in_reply_ret_code); |
93 | } | |
0475c50c | 94 | |
4a4ab2c3 DG |
95 | /* |
96 | * Match function for the events hash table lookup by name. | |
97 | */ | |
98 | static int ht_match_event_by_name(struct cds_lfht_node *node, | |
99 | const void *_key) | |
100 | { | |
022d91ba DG |
101 | struct agent_event *event; |
102 | const struct agent_ht_key *key; | |
4a4ab2c3 | 103 | |
a0377dfe FD |
104 | LTTNG_ASSERT(node); |
105 | LTTNG_ASSERT(_key); | |
4a4ab2c3 | 106 | |
022d91ba | 107 | event = caa_container_of(node, struct agent_event, node.node); |
7966af57 | 108 | key = (agent_ht_key *) _key; |
4a4ab2c3 DG |
109 | |
110 | /* Match 1 elements of the key: name. */ | |
111 | ||
112 | /* Event name */ | |
113 | if (strncmp(event->name, key->name, sizeof(event->name)) != 0) { | |
114 | goto no_match; | |
115 | } | |
116 | /* Match. */ | |
117 | return 1; | |
118 | ||
119 | no_match: | |
120 | return 0; | |
121 | } | |
122 | ||
123 | /* | |
44760c20 JR |
124 | * Match function for the events hash table lookup by name, log level and |
125 | * filter expression. | |
4a4ab2c3 DG |
126 | */ |
127 | static int ht_match_event(struct cds_lfht_node *node, | |
128 | const void *_key) | |
129 | { | |
022d91ba DG |
130 | struct agent_event *event; |
131 | const struct agent_ht_key *key; | |
19a97244 | 132 | int ll_match; |
4a4ab2c3 | 133 | |
a0377dfe FD |
134 | LTTNG_ASSERT(node); |
135 | LTTNG_ASSERT(_key); | |
4a4ab2c3 | 136 | |
022d91ba | 137 | event = caa_container_of(node, struct agent_event, node.node); |
7966af57 | 138 | key = (agent_ht_key *) _key; |
4a4ab2c3 DG |
139 | |
140 | /* Match 2 elements of the key: name and loglevel. */ | |
141 | ||
142 | /* Event name */ | |
143 | if (strncmp(event->name, key->name, sizeof(event->name)) != 0) { | |
144 | goto no_match; | |
145 | } | |
146 | ||
a9319624 | 147 | /* Event loglevel value and type. */ |
19a97244 PP |
148 | ll_match = loglevels_match(event->loglevel_type, |
149 | event->loglevel_value, key->loglevel_type, | |
150 | key->loglevel_value, LTTNG_EVENT_LOGLEVEL_ALL); | |
151 | ||
152 | if (!ll_match) { | |
4a4ab2c3 DG |
153 | goto no_match; |
154 | } | |
a9319624 | 155 | |
6b10b3b0 | 156 | /* Filter expression */ |
d42bc3c8 | 157 | if (!!event->filter_expression != !!key->filter_expression) { |
71e147d0 | 158 | /* One has a filter expression, the other does not */ |
6b10b3b0 AM |
159 | goto no_match; |
160 | } | |
161 | ||
71e147d0 PP |
162 | if (event->filter_expression) { |
163 | if (strncmp(event->filter_expression, key->filter_expression, | |
164 | strlen(event->filter_expression)) != 0) { | |
165 | goto no_match; | |
166 | } | |
167 | } | |
168 | ||
4a4ab2c3 DG |
169 | return 1; |
170 | ||
171 | no_match: | |
172 | return 0; | |
173 | } | |
174 | ||
175 | /* | |
022d91ba | 176 | * Add unique agent event based on the event name and loglevel. |
4a4ab2c3 | 177 | */ |
022d91ba DG |
178 | static void add_unique_agent_event(struct lttng_ht *ht, |
179 | struct agent_event *event) | |
4a4ab2c3 DG |
180 | { |
181 | struct cds_lfht_node *node_ptr; | |
022d91ba | 182 | struct agent_ht_key key; |
4a4ab2c3 | 183 | |
a0377dfe FD |
184 | LTTNG_ASSERT(ht); |
185 | LTTNG_ASSERT(ht->ht); | |
186 | LTTNG_ASSERT(event); | |
4a4ab2c3 DG |
187 | |
188 | key.name = event->name; | |
2106efa0 | 189 | key.loglevel_value = event->loglevel_value; |
a9319624 | 190 | key.loglevel_type = event->loglevel_type; |
6b10b3b0 | 191 | key.filter_expression = event->filter_expression; |
4a4ab2c3 DG |
192 | |
193 | node_ptr = cds_lfht_add_unique(ht->ht, | |
194 | ht->hash_fct(event->node.key, lttng_ht_seed), | |
195 | ht_match_event, &key, &event->node.node); | |
a0377dfe | 196 | LTTNG_ASSERT(node_ptr == &event->node.node); |
4a4ab2c3 DG |
197 | } |
198 | ||
0475c50c | 199 | /* |
022d91ba | 200 | * URCU delayed agent event reclaim. |
0475c50c | 201 | */ |
022d91ba | 202 | static void destroy_event_agent_rcu(struct rcu_head *head) |
0475c50c DG |
203 | { |
204 | struct lttng_ht_node_str *node = | |
0114db0e | 205 | lttng::utils::container_of(head, <tng_ht_node_str::head); |
022d91ba | 206 | struct agent_event *event = |
0114db0e | 207 | lttng::utils::container_of(node, &agent_event::node); |
0475c50c | 208 | |
992febc7 | 209 | agent_destroy_event(event); |
0475c50c DG |
210 | } |
211 | ||
f20baf8e | 212 | /* |
022d91ba | 213 | * URCU delayed agent app reclaim. |
f20baf8e | 214 | */ |
022d91ba | 215 | static void destroy_app_agent_rcu(struct rcu_head *head) |
f20baf8e DG |
216 | { |
217 | struct lttng_ht_node_ulong *node = | |
0114db0e | 218 | lttng::utils::container_of(head, <tng_ht_node_ulong::head); |
022d91ba | 219 | struct agent_app *app = |
0114db0e | 220 | lttng::utils::container_of(node, &agent_app::node); |
f20baf8e DG |
221 | |
222 | free(app); | |
223 | } | |
224 | ||
225 | /* | |
022d91ba DG |
226 | * Communication with the agent. Send the message header to the given socket in |
227 | * big endian. | |
f20baf8e DG |
228 | * |
229 | * Return 0 on success or else a negative errno message of sendmsg() op. | |
230 | */ | |
231 | static int send_header(struct lttcomm_sock *sock, uint64_t data_size, | |
232 | uint32_t cmd, uint32_t cmd_version) | |
233 | { | |
234 | int ret; | |
235 | ssize_t size; | |
022d91ba | 236 | struct lttcomm_agent_hdr msg; |
f20baf8e | 237 | |
a0377dfe | 238 | LTTNG_ASSERT(sock); |
f20baf8e | 239 | |
53efb85a | 240 | memset(&msg, 0, sizeof(msg)); |
f20baf8e DG |
241 | msg.data_size = htobe64(data_size); |
242 | msg.cmd = htobe32(cmd); | |
243 | msg.cmd_version = htobe32(cmd_version); | |
244 | ||
245 | size = sock->ops->sendmsg(sock, &msg, sizeof(msg), 0); | |
246 | if (size < sizeof(msg)) { | |
247 | ret = -errno; | |
248 | goto error; | |
249 | } | |
250 | ret = 0; | |
251 | ||
252 | error: | |
253 | return ret; | |
254 | } | |
255 | ||
256 | /* | |
022d91ba DG |
257 | * Communication call with the agent. Send the payload to the given socket. The |
258 | * header MUST be sent prior to this call. | |
f20baf8e DG |
259 | * |
260 | * Return 0 on success or else a negative errno value of sendmsg() op. | |
261 | */ | |
bdf64013 | 262 | static int send_payload(struct lttcomm_sock *sock, const void *data, |
f20baf8e DG |
263 | size_t size) |
264 | { | |
265 | int ret; | |
266 | ssize_t len; | |
267 | ||
a0377dfe FD |
268 | LTTNG_ASSERT(sock); |
269 | LTTNG_ASSERT(data); | |
f20baf8e DG |
270 | |
271 | len = sock->ops->sendmsg(sock, data, size, 0); | |
272 | if (len < size) { | |
273 | ret = -errno; | |
274 | goto error; | |
275 | } | |
276 | ret = 0; | |
277 | ||
278 | error: | |
279 | return ret; | |
280 | } | |
281 | ||
282 | /* | |
022d91ba DG |
283 | * Communication call with the agent. Receive reply from the agent using the |
284 | * given socket. | |
f20baf8e DG |
285 | * |
286 | * Return 0 on success or else a negative errno value from recvmsg() op. | |
287 | */ | |
288 | static int recv_reply(struct lttcomm_sock *sock, void *buf, size_t size) | |
289 | { | |
290 | int ret; | |
291 | ssize_t len; | |
292 | ||
a0377dfe FD |
293 | LTTNG_ASSERT(sock); |
294 | LTTNG_ASSERT(buf); | |
f20baf8e DG |
295 | |
296 | len = sock->ops->recvmsg(sock, buf, size, 0); | |
297 | if (len < size) { | |
298 | ret = -errno; | |
299 | goto error; | |
300 | } | |
301 | ret = 0; | |
302 | ||
303 | error: | |
304 | return ret; | |
305 | } | |
306 | ||
3c6a091f | 307 | /* |
428de77a | 308 | * Internal event listing for a given app. Populate events. |
3c6a091f DG |
309 | * |
310 | * Return number of element in the list or else a negative LTTNG_ERR* code. | |
428de77a MD |
311 | * On success, the caller is responsible for freeing the memory |
312 | * allocated for "events". | |
3c6a091f | 313 | */ |
022d91ba | 314 | static ssize_t list_events(struct agent_app *app, struct lttng_event **events) |
3c6a091f DG |
315 | { |
316 | int ret, i, len = 0, offset = 0; | |
317 | uint32_t nb_event; | |
318 | size_t data_size; | |
d84af1a4 | 319 | uint32_t reply_ret_code; |
3c6a091f | 320 | struct lttng_event *tmp_events = NULL; |
022d91ba DG |
321 | struct lttcomm_agent_list_reply *reply = NULL; |
322 | struct lttcomm_agent_list_reply_hdr reply_hdr; | |
3c6a091f | 323 | |
a0377dfe FD |
324 | LTTNG_ASSERT(app); |
325 | LTTNG_ASSERT(app->sock); | |
326 | LTTNG_ASSERT(events); | |
3c6a091f | 327 | |
022d91ba | 328 | DBG2("Agent listing events for app pid: %d and socket %d", app->pid, |
3c6a091f DG |
329 | app->sock->fd); |
330 | ||
022d91ba | 331 | ret = send_header(app->sock, 0, AGENT_CMD_LIST, 0); |
3c6a091f DG |
332 | if (ret < 0) { |
333 | goto error_io; | |
334 | } | |
335 | ||
336 | /* Get list header so we know how much we'll receive. */ | |
337 | ret = recv_reply(app->sock, &reply_hdr, sizeof(reply_hdr)); | |
338 | if (ret < 0) { | |
339 | goto error_io; | |
340 | } | |
341 | ||
d84af1a4 JG |
342 | reply_ret_code = be32toh(reply_hdr.ret_code); |
343 | log_reply_code(reply_ret_code); | |
344 | switch (reply_ret_code) { | |
022d91ba | 345 | case AGENT_RET_CODE_SUCCESS: |
3c6a091f DG |
346 | data_size = be32toh(reply_hdr.data_size) + sizeof(*reply); |
347 | break; | |
348 | default: | |
3bd9aaeb | 349 | ret = LTTNG_ERR_UNK; |
3c6a091f DG |
350 | goto error; |
351 | } | |
352 | ||
64803277 | 353 | reply = zmalloc<lttcomm_agent_list_reply>(data_size); |
3c6a091f DG |
354 | if (!reply) { |
355 | ret = LTTNG_ERR_NOMEM; | |
356 | goto error; | |
357 | } | |
358 | ||
359 | /* Get the list with the appropriate data size. */ | |
360 | ret = recv_reply(app->sock, reply, data_size); | |
361 | if (ret < 0) { | |
362 | goto error_io; | |
363 | } | |
364 | ||
365 | nb_event = be32toh(reply->nb_event); | |
64803277 | 366 | tmp_events = calloc<lttng_event>(nb_event); |
3c6a091f DG |
367 | if (!tmp_events) { |
368 | ret = LTTNG_ERR_NOMEM; | |
369 | goto error; | |
370 | } | |
371 | ||
372 | for (i = 0; i < nb_event; i++) { | |
373 | offset += len; | |
0a85e7a3 MD |
374 | if (lttng_strncpy(tmp_events[i].name, reply->payload + offset, |
375 | sizeof(tmp_events[i].name))) { | |
376 | ret = LTTNG_ERR_INVALID; | |
377 | goto error; | |
378 | } | |
3c6a091f DG |
379 | tmp_events[i].pid = app->pid; |
380 | tmp_events[i].enabled = -1; | |
381 | len = strlen(reply->payload + offset) + 1; | |
382 | } | |
383 | ||
384 | *events = tmp_events; | |
385 | ||
386 | free(reply); | |
387 | return nb_event; | |
388 | ||
389 | error_io: | |
390 | ret = LTTNG_ERR_UST_LIST_FAIL; | |
391 | error: | |
392 | free(reply); | |
393 | free(tmp_events); | |
394 | return -ret; | |
395 | ||
396 | } | |
397 | ||
f20baf8e | 398 | /* |
022d91ba DG |
399 | * Internal enable agent event on a agent application. This function |
400 | * communicates with the agent to enable a given event. | |
f20baf8e DG |
401 | * |
402 | * Return LTTNG_OK on success or else a LTTNG_ERR* code. | |
403 | */ | |
733c9165 | 404 | static int enable_event(const struct agent_app *app, struct agent_event *event) |
f20baf8e DG |
405 | { |
406 | int ret; | |
a0ba721c | 407 | char *bytes_to_send; |
f20baf8e | 408 | uint64_t data_size; |
a0ba721c | 409 | size_t filter_expression_length; |
f4f9d4db | 410 | uint32_t reply_ret_code; |
bdf64013 | 411 | struct lttcomm_agent_enable_event msg; |
022d91ba | 412 | struct lttcomm_agent_generic_reply reply; |
f20baf8e | 413 | |
a0377dfe FD |
414 | LTTNG_ASSERT(app); |
415 | LTTNG_ASSERT(app->sock); | |
416 | LTTNG_ASSERT(event); | |
f20baf8e | 417 | |
022d91ba | 418 | DBG2("Agent enabling event %s for app pid: %d and socket %d", event->name, |
f20baf8e DG |
419 | app->pid, app->sock->fd); |
420 | ||
a0ba721c AM |
421 | /* |
422 | * Calculate the payload's size, which is the fixed-size struct followed | |
423 | * by the variable-length filter expression (+1 for the ending \0). | |
424 | */ | |
425 | if (!event->filter_expression) { | |
426 | filter_expression_length = 0; | |
427 | } else { | |
428 | filter_expression_length = strlen(event->filter_expression) + 1; | |
429 | } | |
430 | data_size = sizeof(msg) + filter_expression_length; | |
f20baf8e | 431 | |
53efb85a | 432 | memset(&msg, 0, sizeof(msg)); |
a9bfd666 JG |
433 | msg.loglevel_value = htobe32(event->loglevel_value); |
434 | msg.loglevel_type = htobe32(event->loglevel_type); | |
bb45c03e MD |
435 | if (lttng_strncpy(msg.name, event->name, sizeof(msg.name))) { |
436 | ret = LTTNG_ERR_INVALID; | |
437 | goto error; | |
438 | } | |
a9bfd666 | 439 | msg.filter_expression_length = htobe32(filter_expression_length); |
a0ba721c | 440 | |
bb45c03e MD |
441 | ret = send_header(app->sock, data_size, AGENT_CMD_ENABLE, 0); |
442 | if (ret < 0) { | |
443 | goto error_io; | |
444 | } | |
445 | ||
64803277 | 446 | bytes_to_send = calloc<char>(data_size); |
a0ba721c AM |
447 | if (!bytes_to_send) { |
448 | ret = LTTNG_ERR_NOMEM; | |
449 | goto error; | |
450 | } | |
451 | ||
452 | memcpy(bytes_to_send, &msg, sizeof(msg)); | |
453 | if (filter_expression_length > 0) { | |
454 | memcpy(bytes_to_send + sizeof(msg), event->filter_expression, | |
455 | filter_expression_length); | |
456 | } | |
457 | ||
458 | ret = send_payload(app->sock, bytes_to_send, data_size); | |
459 | free(bytes_to_send); | |
f20baf8e DG |
460 | if (ret < 0) { |
461 | goto error_io; | |
462 | } | |
463 | ||
464 | ret = recv_reply(app->sock, &reply, sizeof(reply)); | |
465 | if (ret < 0) { | |
466 | goto error_io; | |
467 | } | |
468 | ||
f4f9d4db JG |
469 | reply_ret_code = be32toh(reply.ret_code); |
470 | log_reply_code(reply_ret_code); | |
471 | switch (reply_ret_code) { | |
022d91ba | 472 | case AGENT_RET_CODE_SUCCESS: |
f20baf8e | 473 | break; |
022d91ba | 474 | case AGENT_RET_CODE_UNKNOWN_NAME: |
f20baf8e DG |
475 | ret = LTTNG_ERR_UST_EVENT_NOT_FOUND; |
476 | goto error; | |
477 | default: | |
3bd9aaeb | 478 | ret = LTTNG_ERR_UNK; |
f20baf8e DG |
479 | goto error; |
480 | } | |
481 | ||
482 | return LTTNG_OK; | |
483 | ||
484 | error_io: | |
485 | ret = LTTNG_ERR_UST_ENABLE_FAIL; | |
486 | error: | |
487 | return ret; | |
488 | } | |
489 | ||
bdf64013 JG |
490 | /* |
491 | * Send Pascal-style string. Size is sent as a 32-bit big endian integer. | |
492 | */ | |
493 | static | |
494 | int send_pstring(struct lttcomm_sock *sock, const char *str, uint32_t len) | |
495 | { | |
496 | int ret; | |
497 | uint32_t len_be; | |
498 | ||
499 | len_be = htobe32(len); | |
500 | ret = send_payload(sock, &len_be, sizeof(len_be)); | |
501 | if (ret) { | |
502 | goto end; | |
503 | } | |
504 | ||
505 | ret = send_payload(sock, str, len); | |
506 | if (ret) { | |
507 | goto end; | |
508 | } | |
509 | end: | |
510 | return ret; | |
511 | } | |
512 | ||
513 | /* | |
514 | * Internal enable application context on an agent application. This function | |
515 | * communicates with the agent to enable a given application context. | |
516 | * | |
517 | * Return LTTNG_OK on success or else a LTTNG_ERR* code. | |
518 | */ | |
733c9165 JG |
519 | static int app_context_op(const struct agent_app *app, |
520 | const struct agent_app_ctx *ctx, enum lttcomm_agent_command cmd) | |
bdf64013 JG |
521 | { |
522 | int ret; | |
523 | uint32_t reply_ret_code; | |
524 | struct lttcomm_agent_generic_reply reply; | |
525 | size_t app_ctx_provider_name_len, app_ctx_name_len, data_size; | |
526 | ||
a0377dfe FD |
527 | LTTNG_ASSERT(app); |
528 | LTTNG_ASSERT(app->sock); | |
529 | LTTNG_ASSERT(ctx); | |
530 | LTTNG_ASSERT(cmd == AGENT_CMD_APP_CTX_ENABLE || | |
bdf64013 JG |
531 | cmd == AGENT_CMD_APP_CTX_DISABLE); |
532 | ||
533 | DBG2("Agent %s application %s:%s for app pid: %d and socket %d", | |
534 | cmd == AGENT_CMD_APP_CTX_ENABLE ? "enabling" : "disabling", | |
535 | ctx->provider_name, ctx->ctx_name, | |
536 | app->pid, app->sock->fd); | |
537 | ||
538 | /* | |
539 | * Calculate the payload's size, which consists of the size (u32, BE) | |
540 | * of the provider name, the NULL-terminated provider name string, the | |
541 | * size (u32, BE) of the context name, followed by the NULL-terminated | |
542 | * context name string. | |
543 | */ | |
544 | app_ctx_provider_name_len = strlen(ctx->provider_name) + 1; | |
545 | app_ctx_name_len = strlen(ctx->ctx_name) + 1; | |
546 | data_size = sizeof(uint32_t) + app_ctx_provider_name_len + | |
547 | sizeof(uint32_t) + app_ctx_name_len; | |
548 | ||
549 | ret = send_header(app->sock, data_size, cmd, 0); | |
550 | if (ret < 0) { | |
551 | goto error_io; | |
552 | } | |
553 | ||
554 | if (app_ctx_provider_name_len > UINT32_MAX || | |
555 | app_ctx_name_len > UINT32_MAX) { | |
556 | ERR("Application context name > MAX_UINT32"); | |
557 | ret = LTTNG_ERR_INVALID; | |
558 | goto error; | |
559 | } | |
560 | ||
561 | ret = send_pstring(app->sock, ctx->provider_name, | |
562 | (uint32_t) app_ctx_provider_name_len); | |
563 | if (ret < 0) { | |
564 | goto error_io; | |
565 | } | |
566 | ||
567 | ret = send_pstring(app->sock, ctx->ctx_name, | |
568 | (uint32_t) app_ctx_name_len); | |
569 | if (ret < 0) { | |
570 | goto error_io; | |
571 | } | |
572 | ||
573 | ret = recv_reply(app->sock, &reply, sizeof(reply)); | |
574 | if (ret < 0) { | |
575 | goto error_io; | |
576 | } | |
577 | ||
578 | reply_ret_code = be32toh(reply.ret_code); | |
579 | log_reply_code(reply_ret_code); | |
580 | switch (reply_ret_code) { | |
581 | case AGENT_RET_CODE_SUCCESS: | |
582 | break; | |
583 | default: | |
584 | ret = LTTNG_ERR_UNK; | |
585 | goto error; | |
586 | } | |
587 | ||
588 | return LTTNG_OK; | |
589 | ||
590 | error_io: | |
591 | ret = LTTNG_ERR_UST_ENABLE_FAIL; | |
592 | error: | |
593 | return ret; | |
594 | } | |
595 | ||
f20baf8e | 596 | /* |
022d91ba DG |
597 | * Internal disable agent event call on a agent application. This function |
598 | * communicates with the agent to disable a given event. | |
f20baf8e DG |
599 | * |
600 | * Return LTTNG_OK on success or else a LTTNG_ERR* code. | |
601 | */ | |
022d91ba | 602 | static int disable_event(struct agent_app *app, struct agent_event *event) |
f20baf8e DG |
603 | { |
604 | int ret; | |
605 | uint64_t data_size; | |
517992f8 | 606 | uint32_t reply_ret_code; |
bdf64013 | 607 | struct lttcomm_agent_disable_event msg; |
022d91ba | 608 | struct lttcomm_agent_generic_reply reply; |
f20baf8e | 609 | |
a0377dfe FD |
610 | LTTNG_ASSERT(app); |
611 | LTTNG_ASSERT(app->sock); | |
612 | LTTNG_ASSERT(event); | |
f20baf8e | 613 | |
022d91ba | 614 | DBG2("Agent disabling event %s for app pid: %d and socket %d", event->name, |
f20baf8e DG |
615 | app->pid, app->sock->fd); |
616 | ||
617 | data_size = sizeof(msg); | |
63be730a MD |
618 | memset(&msg, 0, sizeof(msg)); |
619 | if (lttng_strncpy(msg.name, event->name, sizeof(msg.name))) { | |
620 | ret = LTTNG_ERR_INVALID; | |
621 | goto error; | |
622 | } | |
f20baf8e | 623 | |
022d91ba | 624 | ret = send_header(app->sock, data_size, AGENT_CMD_DISABLE, 0); |
f20baf8e DG |
625 | if (ret < 0) { |
626 | goto error_io; | |
627 | } | |
628 | ||
f20baf8e DG |
629 | ret = send_payload(app->sock, &msg, sizeof(msg)); |
630 | if (ret < 0) { | |
631 | goto error_io; | |
632 | } | |
633 | ||
634 | ret = recv_reply(app->sock, &reply, sizeof(reply)); | |
635 | if (ret < 0) { | |
636 | goto error_io; | |
637 | } | |
638 | ||
517992f8 JG |
639 | reply_ret_code = be32toh(reply.ret_code); |
640 | log_reply_code(reply_ret_code); | |
641 | switch (reply_ret_code) { | |
022d91ba DG |
642 | case AGENT_RET_CODE_SUCCESS: |
643 | break; | |
644 | case AGENT_RET_CODE_UNKNOWN_NAME: | |
645 | ret = LTTNG_ERR_UST_EVENT_NOT_FOUND; | |
646 | goto error; | |
647 | default: | |
3bd9aaeb | 648 | ret = LTTNG_ERR_UNK; |
022d91ba | 649 | goto error; |
f20baf8e DG |
650 | } |
651 | ||
652 | return LTTNG_OK; | |
653 | ||
654 | error_io: | |
655 | ret = LTTNG_ERR_UST_DISABLE_FAIL; | |
656 | error: | |
657 | return ret; | |
658 | } | |
659 | ||
1b500e7a | 660 | /* |
022d91ba | 661 | * Send back the registration DONE command to a given agent application. |
1b500e7a DG |
662 | * |
663 | * Return 0 on success or else a negative value. | |
664 | */ | |
022d91ba | 665 | int agent_send_registration_done(struct agent_app *app) |
1b500e7a | 666 | { |
a0377dfe FD |
667 | LTTNG_ASSERT(app); |
668 | LTTNG_ASSERT(app->sock); | |
1b500e7a | 669 | |
022d91ba | 670 | DBG("Agent sending registration done to app socket %d", app->sock->fd); |
1b500e7a | 671 | |
b26d1f5c | 672 | return send_header(app->sock, 0, AGENT_CMD_REG_DONE, 0); |
1b500e7a DG |
673 | } |
674 | ||
f20baf8e | 675 | /* |
022d91ba | 676 | * Enable agent event on every agent applications registered with the session |
f20baf8e DG |
677 | * daemon. |
678 | * | |
679 | * Return LTTNG_OK on success or else a LTTNG_ERR* code. | |
680 | */ | |
fefd409b DG |
681 | int agent_enable_event(struct agent_event *event, |
682 | enum lttng_domain_type domain) | |
f20baf8e DG |
683 | { |
684 | int ret; | |
022d91ba | 685 | struct agent_app *app; |
f20baf8e DG |
686 | struct lttng_ht_iter iter; |
687 | ||
a0377dfe | 688 | LTTNG_ASSERT(event); |
f20baf8e DG |
689 | |
690 | rcu_read_lock(); | |
691 | ||
412d7227 | 692 | cds_lfht_for_each_entry(the_agent_apps_ht_by_sock->ht, &iter.iter, app, |
f20baf8e | 693 | node.node) { |
fefd409b DG |
694 | if (app->domain != domain) { |
695 | continue; | |
696 | } | |
697 | ||
022d91ba | 698 | /* Enable event on agent application through TCP socket. */ |
f20baf8e DG |
699 | ret = enable_event(app, event); |
700 | if (ret != LTTNG_OK) { | |
701 | goto error; | |
702 | } | |
f20baf8e DG |
703 | } |
704 | ||
44760c20 | 705 | event->enabled_count++; |
f20baf8e DG |
706 | ret = LTTNG_OK; |
707 | ||
708 | error: | |
709 | rcu_read_unlock(); | |
710 | return ret; | |
711 | } | |
712 | ||
bdf64013 JG |
713 | static |
714 | void destroy_app_ctx(struct agent_app_ctx *ctx) | |
715 | { | |
716 | free(ctx->provider_name); | |
717 | free(ctx->ctx_name); | |
718 | free(ctx); | |
719 | } | |
720 | ||
721 | static | |
df4f5a87 | 722 | struct agent_app_ctx *create_app_ctx(const struct lttng_event_context *ctx) |
bdf64013 JG |
723 | { |
724 | struct agent_app_ctx *agent_ctx = NULL; | |
725 | ||
726 | if (!ctx) { | |
727 | goto end; | |
728 | } | |
729 | ||
a0377dfe | 730 | LTTNG_ASSERT(ctx->ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT); |
64803277 | 731 | agent_ctx = zmalloc<agent_app_ctx>(); |
bdf64013 JG |
732 | if (!agent_ctx) { |
733 | goto end; | |
734 | } | |
735 | ||
736 | agent_ctx->provider_name = strdup(ctx->u.app_ctx.provider_name); | |
737 | agent_ctx->ctx_name = strdup(ctx->u.app_ctx.ctx_name); | |
738 | if (!agent_ctx->provider_name || !agent_ctx->ctx_name) { | |
739 | destroy_app_ctx(agent_ctx); | |
740 | agent_ctx = NULL; | |
741 | } | |
742 | end: | |
743 | return agent_ctx; | |
744 | } | |
745 | ||
746 | /* | |
747 | * Enable agent context on every agent applications registered with the session | |
748 | * daemon. | |
749 | * | |
750 | * Return LTTNG_OK on success or else a LTTNG_ERR* code. | |
751 | */ | |
df4f5a87 | 752 | int agent_enable_context(const struct lttng_event_context *ctx, |
bdf64013 JG |
753 | enum lttng_domain_type domain) |
754 | { | |
755 | int ret; | |
756 | struct agent_app *app; | |
757 | struct lttng_ht_iter iter; | |
758 | ||
a0377dfe | 759 | LTTNG_ASSERT(ctx); |
bdf64013 JG |
760 | if (ctx->ctx != LTTNG_EVENT_CONTEXT_APP_CONTEXT) { |
761 | ret = LTTNG_ERR_INVALID; | |
762 | goto error; | |
763 | } | |
764 | ||
765 | rcu_read_lock(); | |
766 | ||
412d7227 | 767 | cds_lfht_for_each_entry(the_agent_apps_ht_by_sock->ht, &iter.iter, app, |
bdf64013 JG |
768 | node.node) { |
769 | struct agent_app_ctx *agent_ctx; | |
770 | ||
771 | if (app->domain != domain) { | |
772 | continue; | |
773 | } | |
774 | ||
775 | agent_ctx = create_app_ctx(ctx); | |
776 | if (!agent_ctx) { | |
a33c2651 | 777 | ret = LTTNG_ERR_NOMEM; |
bdf64013 JG |
778 | goto error_unlock; |
779 | } | |
780 | ||
781 | /* Enable event on agent application through TCP socket. */ | |
782 | ret = app_context_op(app, agent_ctx, AGENT_CMD_APP_CTX_ENABLE); | |
c12618b5 | 783 | destroy_app_ctx(agent_ctx); |
bdf64013 | 784 | if (ret != LTTNG_OK) { |
bdf64013 JG |
785 | goto error_unlock; |
786 | } | |
787 | } | |
788 | ||
789 | ret = LTTNG_OK; | |
790 | ||
791 | error_unlock: | |
792 | rcu_read_unlock(); | |
793 | error: | |
794 | return ret; | |
795 | } | |
796 | ||
f20baf8e | 797 | /* |
bdf64013 | 798 | * Disable agent event on every agent application registered with the session |
f20baf8e DG |
799 | * daemon. |
800 | * | |
801 | * Return LTTNG_OK on success or else a LTTNG_ERR* code. | |
802 | */ | |
fefd409b DG |
803 | int agent_disable_event(struct agent_event *event, |
804 | enum lttng_domain_type domain) | |
f20baf8e | 805 | { |
f1bc0129 | 806 | int ret = LTTNG_OK; |
022d91ba | 807 | struct agent_app *app; |
f20baf8e DG |
808 | struct lttng_ht_iter iter; |
809 | ||
a0377dfe | 810 | LTTNG_ASSERT(event); |
44760c20 JR |
811 | if (!AGENT_EVENT_IS_ENABLED(event)) { |
812 | goto end; | |
813 | } | |
814 | ||
815 | if (--event->enabled_count != 0) { | |
816 | /* | |
817 | * Agent event still enabled. Disable the agent event only when | |
818 | * all "users" have disabled it (event notifiers, event rules, | |
819 | * etc.). | |
820 | */ | |
821 | ret = LTTNG_OK; | |
f1bc0129 JG |
822 | goto end; |
823 | } | |
f20baf8e DG |
824 | |
825 | rcu_read_lock(); | |
826 | ||
412d7227 | 827 | cds_lfht_for_each_entry(the_agent_apps_ht_by_sock->ht, &iter.iter, app, |
f20baf8e | 828 | node.node) { |
fefd409b DG |
829 | if (app->domain != domain) { |
830 | continue; | |
831 | } | |
832 | ||
022d91ba | 833 | /* Enable event on agent application through TCP socket. */ |
f20baf8e DG |
834 | ret = disable_event(app, event); |
835 | if (ret != LTTNG_OK) { | |
836 | goto error; | |
837 | } | |
f20baf8e DG |
838 | } |
839 | ||
44760c20 | 840 | /* event->enabled_count is now 0. */ |
a0377dfe | 841 | LTTNG_ASSERT(!AGENT_EVENT_IS_ENABLED(event)); |
f20baf8e DG |
842 | |
843 | error: | |
844 | rcu_read_unlock(); | |
f1bc0129 | 845 | end: |
f20baf8e DG |
846 | return ret; |
847 | } | |
848 | ||
bdf64013 JG |
849 | /* |
850 | * Disable agent context on every agent application registered with the session | |
851 | * daemon. | |
852 | * | |
853 | * Return LTTNG_OK on success or else a LTTNG_ERR* code. | |
854 | */ | |
46440d0c SM |
855 | static int disable_context(struct agent_app_ctx *ctx, |
856 | enum lttng_domain_type domain) | |
bdf64013 JG |
857 | { |
858 | int ret = LTTNG_OK; | |
859 | struct agent_app *app; | |
860 | struct lttng_ht_iter iter; | |
861 | ||
a0377dfe | 862 | LTTNG_ASSERT(ctx); |
bdf64013 JG |
863 | |
864 | rcu_read_lock(); | |
865 | DBG2("Disabling agent application context %s:%s", | |
866 | ctx->provider_name, ctx->ctx_name); | |
412d7227 | 867 | cds_lfht_for_each_entry(the_agent_apps_ht_by_sock->ht, &iter.iter, app, |
bdf64013 JG |
868 | node.node) { |
869 | if (app->domain != domain) { | |
870 | continue; | |
871 | } | |
872 | ||
873 | ret = app_context_op(app, ctx, AGENT_CMD_APP_CTX_DISABLE); | |
874 | if (ret != LTTNG_OK) { | |
875 | goto end; | |
876 | } | |
877 | } | |
878 | end: | |
879 | rcu_read_unlock(); | |
880 | return ret; | |
881 | } | |
882 | ||
f20baf8e | 883 | /* |
022d91ba DG |
884 | * Ask every agent for the list of possible event. Events is allocated with the |
885 | * events of every agent application. | |
f20baf8e DG |
886 | * |
887 | * Return the number of events or else a negative value. | |
888 | */ | |
f60140a1 DG |
889 | int agent_list_events(struct lttng_event **events, |
890 | enum lttng_domain_type domain) | |
f20baf8e DG |
891 | { |
892 | int ret; | |
893 | size_t nbmem, count = 0; | |
022d91ba | 894 | struct agent_app *app; |
aae6255e | 895 | struct lttng_event *tmp_events = NULL; |
f20baf8e DG |
896 | struct lttng_ht_iter iter; |
897 | ||
a0377dfe | 898 | LTTNG_ASSERT(events); |
f20baf8e | 899 | |
0e115563 DG |
900 | DBG2("Agent listing events for domain %d", domain); |
901 | ||
f20baf8e | 902 | nbmem = UST_APP_EVENT_LIST_SIZE; |
64803277 | 903 | tmp_events = calloc<lttng_event>(nbmem); |
f20baf8e | 904 | if (!tmp_events) { |
022d91ba | 905 | PERROR("zmalloc agent list events"); |
f20baf8e DG |
906 | ret = -ENOMEM; |
907 | goto error; | |
908 | } | |
909 | ||
910 | rcu_read_lock(); | |
412d7227 | 911 | cds_lfht_for_each_entry(the_agent_apps_ht_by_sock->ht, &iter.iter, app, |
f20baf8e DG |
912 | node.node) { |
913 | ssize_t nb_ev; | |
022d91ba | 914 | struct lttng_event *agent_events; |
f20baf8e | 915 | |
f60140a1 DG |
916 | /* Skip domain not asked by the list. */ |
917 | if (app->domain != domain) { | |
918 | continue; | |
919 | } | |
920 | ||
022d91ba | 921 | nb_ev = list_events(app, &agent_events); |
f20baf8e DG |
922 | if (nb_ev < 0) { |
923 | ret = nb_ev; | |
428de77a | 924 | goto error_unlock; |
f20baf8e DG |
925 | } |
926 | ||
53efb85a | 927 | if (count + nb_ev > nbmem) { |
f20baf8e | 928 | /* In case the realloc fails, we free the memory */ |
53efb85a MD |
929 | struct lttng_event *new_tmp_events; |
930 | size_t new_nbmem; | |
931 | ||
7966af57 | 932 | new_nbmem = std::max(count + nb_ev, nbmem << 1); |
022d91ba | 933 | DBG2("Reallocating agent event list from %zu to %zu entries", |
53efb85a | 934 | nbmem, new_nbmem); |
7966af57 | 935 | new_tmp_events = (lttng_event *) realloc(tmp_events, |
53efb85a MD |
936 | new_nbmem * sizeof(*new_tmp_events)); |
937 | if (!new_tmp_events) { | |
022d91ba | 938 | PERROR("realloc agent events"); |
f20baf8e | 939 | ret = -ENOMEM; |
022d91ba | 940 | free(agent_events); |
428de77a | 941 | goto error_unlock; |
f20baf8e | 942 | } |
53efb85a MD |
943 | /* Zero the new memory */ |
944 | memset(new_tmp_events + nbmem, 0, | |
945 | (new_nbmem - nbmem) * sizeof(*new_tmp_events)); | |
946 | nbmem = new_nbmem; | |
947 | tmp_events = new_tmp_events; | |
f20baf8e | 948 | } |
022d91ba | 949 | memcpy(tmp_events + count, agent_events, |
53efb85a | 950 | nb_ev * sizeof(*tmp_events)); |
022d91ba | 951 | free(agent_events); |
f20baf8e DG |
952 | count += nb_ev; |
953 | } | |
954 | rcu_read_unlock(); | |
955 | ||
956 | ret = count; | |
957 | *events = tmp_events; | |
aae6255e | 958 | return ret; |
f20baf8e | 959 | |
428de77a MD |
960 | error_unlock: |
961 | rcu_read_unlock(); | |
f20baf8e | 962 | error: |
aae6255e | 963 | free(tmp_events); |
f20baf8e DG |
964 | return ret; |
965 | } | |
966 | ||
967 | /* | |
022d91ba | 968 | * Create a agent app object using the given PID. |
f20baf8e DG |
969 | * |
970 | * Return newly allocated object or else NULL on error. | |
971 | */ | |
fefd409b DG |
972 | struct agent_app *agent_create_app(pid_t pid, enum lttng_domain_type domain, |
973 | struct lttcomm_sock *sock) | |
f20baf8e | 974 | { |
022d91ba | 975 | struct agent_app *app; |
f20baf8e | 976 | |
a0377dfe | 977 | LTTNG_ASSERT(sock); |
f20baf8e | 978 | |
64803277 | 979 | app = zmalloc<agent_app>(); |
f20baf8e | 980 | if (!app) { |
733c9165 | 981 | PERROR("Failed to allocate agent application instance"); |
f20baf8e DG |
982 | goto error; |
983 | } | |
984 | ||
985 | app->pid = pid; | |
fefd409b | 986 | app->domain = domain; |
f20baf8e | 987 | app->sock = sock; |
f20baf8e DG |
988 | lttng_ht_node_init_ulong(&app->node, (unsigned long) app->sock->fd); |
989 | ||
990 | error: | |
991 | return app; | |
992 | } | |
993 | ||
994 | /* | |
022d91ba | 995 | * Lookup agent app by socket in the global hash table. |
f20baf8e DG |
996 | * |
997 | * RCU read side lock MUST be acquired. | |
998 | * | |
999 | * Return object if found else NULL. | |
1000 | */ | |
022d91ba | 1001 | struct agent_app *agent_find_app_by_sock(int sock) |
f20baf8e DG |
1002 | { |
1003 | struct lttng_ht_node_ulong *node; | |
1004 | struct lttng_ht_iter iter; | |
022d91ba | 1005 | struct agent_app *app; |
f20baf8e | 1006 | |
a0377dfe | 1007 | LTTNG_ASSERT(sock >= 0); |
48b7cdc2 | 1008 | ASSERT_RCU_READ_LOCKED(); |
f20baf8e | 1009 | |
412d7227 SM |
1010 | lttng_ht_lookup(the_agent_apps_ht_by_sock, |
1011 | (void *) ((unsigned long) sock), &iter); | |
f20baf8e DG |
1012 | node = lttng_ht_iter_get_node_ulong(&iter); |
1013 | if (node == NULL) { | |
1014 | goto error; | |
1015 | } | |
0114db0e | 1016 | app = lttng::utils::container_of(node, &agent_app::node); |
f20baf8e | 1017 | |
022d91ba | 1018 | DBG3("Agent app pid %d found by sock %d.", app->pid, sock); |
f20baf8e DG |
1019 | return app; |
1020 | ||
1021 | error: | |
022d91ba | 1022 | DBG3("Agent app NOT found by sock %d.", sock); |
f20baf8e DG |
1023 | return NULL; |
1024 | } | |
1025 | ||
1026 | /* | |
022d91ba | 1027 | * Add agent application object to the global hash table. |
f20baf8e | 1028 | */ |
022d91ba | 1029 | void agent_add_app(struct agent_app *app) |
f20baf8e | 1030 | { |
a0377dfe | 1031 | LTTNG_ASSERT(app); |
f20baf8e | 1032 | |
022d91ba | 1033 | DBG3("Agent adding app sock: %d and pid: %d to ht", app->sock->fd, app->pid); |
412d7227 | 1034 | lttng_ht_add_unique_ulong(the_agent_apps_ht_by_sock, &app->node); |
f20baf8e DG |
1035 | } |
1036 | ||
f20baf8e | 1037 | /* |
022d91ba | 1038 | * Delete agent application from the global hash table. |
d558f236 JG |
1039 | * |
1040 | * rcu_read_lock() must be held by the caller. | |
f20baf8e | 1041 | */ |
022d91ba | 1042 | void agent_delete_app(struct agent_app *app) |
f20baf8e DG |
1043 | { |
1044 | int ret; | |
1045 | struct lttng_ht_iter iter; | |
1046 | ||
a0377dfe | 1047 | LTTNG_ASSERT(app); |
48b7cdc2 | 1048 | ASSERT_RCU_READ_LOCKED(); |
f20baf8e | 1049 | |
022d91ba | 1050 | DBG3("Agent deleting app pid: %d and sock: %d", app->pid, app->sock->fd); |
f20baf8e DG |
1051 | |
1052 | iter.iter.node = &app->node.node; | |
412d7227 | 1053 | ret = lttng_ht_del(the_agent_apps_ht_by_sock, &iter); |
a0377dfe | 1054 | LTTNG_ASSERT(!ret); |
f20baf8e DG |
1055 | } |
1056 | ||
1057 | /* | |
e785906c | 1058 | * Destroy an agent application object by detaching it from its corresponding |
022d91ba | 1059 | * UST app if one is connected by closing the socket. Finally, perform a |
428de77a | 1060 | * delayed memory reclaim. |
f20baf8e | 1061 | */ |
022d91ba | 1062 | void agent_destroy_app(struct agent_app *app) |
f20baf8e | 1063 | { |
a0377dfe | 1064 | LTTNG_ASSERT(app); |
f20baf8e DG |
1065 | |
1066 | if (app->sock) { | |
1067 | app->sock->ops->close(app->sock); | |
1068 | lttcomm_destroy_sock(app->sock); | |
1069 | } | |
1070 | ||
022d91ba | 1071 | call_rcu(&app->node.head, destroy_app_agent_rcu); |
f20baf8e DG |
1072 | } |
1073 | ||
0475c50c | 1074 | /* |
022d91ba | 1075 | * Initialize an already allocated agent object. |
0475c50c DG |
1076 | * |
1077 | * Return 0 on success or else a negative errno value. | |
1078 | */ | |
022d91ba | 1079 | int agent_init(struct agent *agt) |
0475c50c DG |
1080 | { |
1081 | int ret; | |
1082 | ||
a0377dfe | 1083 | LTTNG_ASSERT(agt); |
0475c50c | 1084 | |
022d91ba DG |
1085 | agt->events = lttng_ht_new(0, LTTNG_HT_TYPE_STRING); |
1086 | if (!agt->events) { | |
0475c50c DG |
1087 | ret = -ENOMEM; |
1088 | goto error; | |
1089 | } | |
fefd409b | 1090 | lttng_ht_node_init_u64(&agt->node, agt->domain); |
0475c50c | 1091 | |
bdf64013 | 1092 | CDS_INIT_LIST_HEAD(&agt->app_ctx_list); |
0475c50c DG |
1093 | return 0; |
1094 | ||
1095 | error: | |
1096 | return ret; | |
1097 | } | |
1098 | ||
fefd409b DG |
1099 | /* |
1100 | * Add agent object to the given hash table. | |
1101 | */ | |
1102 | void agent_add(struct agent *agt, struct lttng_ht *ht) | |
1103 | { | |
a0377dfe FD |
1104 | LTTNG_ASSERT(agt); |
1105 | LTTNG_ASSERT(ht); | |
fefd409b DG |
1106 | |
1107 | DBG3("Agent adding from domain %d", agt->domain); | |
1108 | ||
fefd409b | 1109 | lttng_ht_add_unique_u64(ht, &agt->node); |
fefd409b DG |
1110 | } |
1111 | ||
1112 | /* | |
1113 | * Create an agent object for the given domain. | |
1114 | * | |
1115 | * Return the allocated agent or NULL on error. | |
1116 | */ | |
1117 | struct agent *agent_create(enum lttng_domain_type domain) | |
1118 | { | |
1119 | int ret; | |
1120 | struct agent *agt; | |
1121 | ||
64803277 | 1122 | agt = zmalloc<agent>(); |
fefd409b DG |
1123 | if (!agt) { |
1124 | goto error; | |
1125 | } | |
1126 | agt->domain = domain; | |
1127 | ||
1128 | ret = agent_init(agt); | |
1129 | if (ret < 0) { | |
1130 | free(agt); | |
988ae332 | 1131 | agt = NULL; |
fefd409b DG |
1132 | goto error; |
1133 | } | |
1134 | ||
1135 | error: | |
1136 | return agt; | |
1137 | } | |
1138 | ||
0475c50c | 1139 | /* |
51755dc8 JG |
1140 | * Create a newly allocated agent event data structure. |
1141 | * Ownership of filter_expression is taken. | |
0475c50c DG |
1142 | * |
1143 | * Return a new object else NULL on error. | |
1144 | */ | |
022d91ba | 1145 | struct agent_event *agent_create_event(const char *name, |
a9319624 | 1146 | enum lttng_loglevel_type loglevel_type, int loglevel_value, |
2b00d462 | 1147 | struct lttng_bytecode *filter, char *filter_expression) |
0475c50c | 1148 | { |
51755dc8 | 1149 | struct agent_event *event = NULL; |
0475c50c | 1150 | |
6b10b3b0 AM |
1151 | DBG3("Agent create new event with name %s, loglevel type %d, \ |
1152 | loglevel value %d and filter %s", | |
40111ba1 JG |
1153 | name, loglevel_type, loglevel_value, |
1154 | filter_expression ? filter_expression : "NULL"); | |
0475c50c | 1155 | |
51755dc8 JG |
1156 | if (!name) { |
1157 | ERR("Failed to create agent event; no name provided."); | |
0475c50c DG |
1158 | goto error; |
1159 | } | |
1160 | ||
64803277 | 1161 | event = zmalloc<agent_event>(); |
51755dc8 JG |
1162 | if (!event) { |
1163 | goto error; | |
0475c50c DG |
1164 | } |
1165 | ||
51755dc8 JG |
1166 | strncpy(event->name, name, sizeof(event->name)); |
1167 | event->name[sizeof(event->name) - 1] = '\0'; | |
1168 | lttng_ht_node_init_str(&event->node, event->name); | |
be6a6276 | 1169 | |
2106efa0 | 1170 | event->loglevel_value = loglevel_value; |
51755dc8 JG |
1171 | event->loglevel_type = loglevel_type; |
1172 | event->filter = filter; | |
1173 | event->filter_expression = filter_expression; | |
0475c50c DG |
1174 | error: |
1175 | return event; | |
1176 | } | |
1177 | ||
1178 | /* | |
022d91ba | 1179 | * Unique add of a agent event to an agent object. |
0475c50c | 1180 | */ |
022d91ba | 1181 | void agent_add_event(struct agent_event *event, struct agent *agt) |
0475c50c | 1182 | { |
a0377dfe FD |
1183 | LTTNG_ASSERT(event); |
1184 | LTTNG_ASSERT(agt); | |
1185 | LTTNG_ASSERT(agt->events); | |
0475c50c | 1186 | |
022d91ba | 1187 | DBG3("Agent adding event %s", event->name); |
022d91ba | 1188 | add_unique_agent_event(agt->events, event); |
022d91ba | 1189 | agt->being_used = 1; |
0475c50c DG |
1190 | } |
1191 | ||
bdf64013 JG |
1192 | /* |
1193 | * Unique add of a agent context to an agent object. | |
1194 | */ | |
df4f5a87 | 1195 | int agent_add_context(const struct lttng_event_context *ctx, struct agent *agt) |
bdf64013 JG |
1196 | { |
1197 | int ret = LTTNG_OK; | |
1198 | struct agent_app_ctx *agent_ctx = NULL; | |
1199 | ||
a0377dfe FD |
1200 | LTTNG_ASSERT(ctx); |
1201 | LTTNG_ASSERT(agt); | |
1202 | LTTNG_ASSERT(agt->events); | |
1203 | LTTNG_ASSERT(ctx->ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT); | |
bdf64013 JG |
1204 | |
1205 | agent_ctx = create_app_ctx(ctx); | |
1206 | if (!agent_ctx) { | |
1207 | ret = LTTNG_ERR_NOMEM; | |
1208 | goto end; | |
1209 | } | |
1210 | ||
1211 | DBG3("Agent adding context %s:%s", ctx->u.app_ctx.provider_name, | |
1212 | ctx->u.app_ctx.ctx_name); | |
1213 | cds_list_add_tail_rcu(&agent_ctx->list_node, &agt->app_ctx_list); | |
1214 | end: | |
1215 | return ret; | |
1216 | } | |
1217 | ||
0475c50c | 1218 | /* |
e261a6cc | 1219 | * Find multiple agent events sharing the given name. |
4a4ab2c3 | 1220 | * |
e261a6cc PP |
1221 | * RCU read side lock MUST be acquired. It must be held for the |
1222 | * duration of the iteration. | |
4a4ab2c3 | 1223 | * |
e261a6cc | 1224 | * Sets the given iterator. |
4a4ab2c3 | 1225 | */ |
e261a6cc PP |
1226 | void agent_find_events_by_name(const char *name, struct agent *agt, |
1227 | struct lttng_ht_iter* iter) | |
4a4ab2c3 | 1228 | { |
4a4ab2c3 | 1229 | struct lttng_ht *ht; |
022d91ba | 1230 | struct agent_ht_key key; |
4a4ab2c3 | 1231 | |
a0377dfe FD |
1232 | LTTNG_ASSERT(name); |
1233 | LTTNG_ASSERT(agt); | |
1234 | LTTNG_ASSERT(agt->events); | |
1235 | LTTNG_ASSERT(iter); | |
48b7cdc2 | 1236 | ASSERT_RCU_READ_LOCKED(); |
4a4ab2c3 | 1237 | |
022d91ba | 1238 | ht = agt->events; |
4a4ab2c3 DG |
1239 | key.name = name; |
1240 | ||
1241 | cds_lfht_lookup(ht->ht, ht->hash_fct((void *) name, lttng_ht_seed), | |
e261a6cc PP |
1242 | ht_match_event_by_name, &key, &iter->iter); |
1243 | } | |
4a4ab2c3 | 1244 | |
44760c20 JR |
1245 | /* |
1246 | * Find the agent event matching a trigger. | |
1247 | * | |
1248 | * RCU read side lock MUST be acquired. It must be held for as long as | |
1249 | * the returned agent_event is used. | |
1250 | * | |
1251 | * Return object if found else NULL. | |
1252 | */ | |
1253 | struct agent_event *agent_find_event_by_trigger( | |
1254 | const struct lttng_trigger *trigger, struct agent *agt) | |
1255 | { | |
1256 | enum lttng_condition_status c_status; | |
1257 | enum lttng_event_rule_status er_status; | |
1258 | enum lttng_domain_type domain; | |
1259 | const struct lttng_condition *condition; | |
1260 | const struct lttng_event_rule *rule; | |
1261 | const char *name; | |
1262 | const char *filter_expression; | |
85b05318 | 1263 | const struct lttng_log_level_rule *log_level_rule; |
44760c20 JR |
1264 | /* Unused when loglevel_type is 'ALL'. */ |
1265 | int loglevel_value = 0; | |
1266 | enum lttng_loglevel_type loglevel_type; | |
695f7044 JR |
1267 | event_rule_logging_get_name_pattern logging_get_name_pattern; |
1268 | event_rule_logging_get_log_level_rule logging_get_log_level_rule; | |
44760c20 | 1269 | |
a0377dfe FD |
1270 | LTTNG_ASSERT(agt); |
1271 | LTTNG_ASSERT(agt->events); | |
48b7cdc2 | 1272 | ASSERT_RCU_READ_LOCKED(); |
44760c20 JR |
1273 | |
1274 | condition = lttng_trigger_get_const_condition(trigger); | |
1275 | ||
a0377dfe | 1276 | LTTNG_ASSERT(lttng_condition_get_type(condition) == |
8dbb86b8 | 1277 | LTTNG_CONDITION_TYPE_EVENT_RULE_MATCHES); |
44760c20 | 1278 | |
8dbb86b8 JR |
1279 | c_status = lttng_condition_event_rule_matches_get_rule( |
1280 | condition, &rule); | |
a0377dfe | 1281 | LTTNG_ASSERT(c_status == LTTNG_CONDITION_STATUS_OK); |
44760c20 | 1282 | |
695f7044 JR |
1283 | switch (lttng_event_rule_get_type(rule)) { |
1284 | case LTTNG_EVENT_RULE_TYPE_JUL_LOGGING: | |
1285 | logging_get_name_pattern = | |
1286 | lttng_event_rule_jul_logging_get_name_pattern; | |
1287 | logging_get_log_level_rule = | |
1288 | lttng_event_rule_jul_logging_get_log_level_rule; | |
1289 | break; | |
1290 | case LTTNG_EVENT_RULE_TYPE_LOG4J_LOGGING: | |
1291 | logging_get_name_pattern = | |
1292 | lttng_event_rule_log4j_logging_get_name_pattern; | |
1293 | logging_get_log_level_rule = | |
1294 | lttng_event_rule_log4j_logging_get_log_level_rule; | |
1295 | break; | |
1296 | case LTTNG_EVENT_RULE_TYPE_PYTHON_LOGGING: | |
1297 | logging_get_name_pattern = | |
1298 | lttng_event_rule_python_logging_get_name_pattern; | |
1299 | logging_get_log_level_rule = | |
1300 | lttng_event_rule_python_logging_get_log_level_rule; | |
1301 | break; | |
1302 | default: | |
1303 | abort(); | |
1304 | break; | |
1305 | } | |
44760c20 JR |
1306 | |
1307 | domain = lttng_event_rule_get_domain_type(rule); | |
a0377dfe | 1308 | LTTNG_ASSERT(domain == LTTNG_DOMAIN_JUL || domain == LTTNG_DOMAIN_LOG4J || |
44760c20 JR |
1309 | domain == LTTNG_DOMAIN_PYTHON); |
1310 | ||
8bc73626 | 1311 | /* Get the event's pattern name ('name' in the legacy terminology). */ |
695f7044 | 1312 | er_status = logging_get_name_pattern(rule, &name); |
a0377dfe | 1313 | LTTNG_ASSERT(er_status == LTTNG_EVENT_RULE_STATUS_OK); |
44760c20 JR |
1314 | |
1315 | /* Get the internal filter expression. */ | |
1316 | filter_expression = lttng_event_rule_get_filter(rule); | |
1317 | ||
85b05318 | 1318 | /* Map log_level_rule to loglevel value. */ |
695f7044 | 1319 | er_status = logging_get_log_level_rule(rule, &log_level_rule); |
85b05318 JR |
1320 | if (er_status == LTTNG_EVENT_RULE_STATUS_UNSET) { |
1321 | loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL; | |
1322 | loglevel_value = 0; | |
1323 | } else if (er_status == LTTNG_EVENT_RULE_STATUS_OK) { | |
1324 | lttng_log_level_rule_to_loglevel(log_level_rule, &loglevel_type, &loglevel_value); | |
1325 | } else { | |
1326 | abort(); | |
44760c20 JR |
1327 | } |
1328 | ||
1329 | return agent_find_event(name, loglevel_type, loglevel_value, | |
1330 | filter_expression, agt); | |
1331 | } | |
1332 | ||
e261a6cc PP |
1333 | /* |
1334 | * Get the next agent event duplicate by name. This should be called | |
1335 | * after a call to agent_find_events_by_name() to iterate on events. | |
1336 | * | |
1337 | * The RCU read lock must be held during the iteration and for as long | |
1338 | * as the object the iterator points to remains in use. | |
1339 | */ | |
1340 | void agent_event_next_duplicate(const char *name, | |
1341 | struct agent *agt, struct lttng_ht_iter* iter) | |
1342 | { | |
1343 | struct agent_ht_key key; | |
4a4ab2c3 | 1344 | |
48b7cdc2 FD |
1345 | ASSERT_RCU_READ_LOCKED(); |
1346 | ||
e261a6cc PP |
1347 | key.name = name; |
1348 | ||
1349 | cds_lfht_next_duplicate(agt->events->ht, ht_match_event_by_name, | |
1350 | &key, &iter->iter); | |
4a4ab2c3 DG |
1351 | } |
1352 | ||
1353 | /* | |
6b10b3b0 | 1354 | * Find a agent event in the given agent using name, loglevel and filter. |
0475c50c | 1355 | * |
1e17eae2 JG |
1356 | * RCU read side lock MUST be acquired. It must be kept for as long as |
1357 | * the returned agent_event is used. | |
0475c50c DG |
1358 | * |
1359 | * Return object if found else NULL. | |
1360 | */ | |
a9319624 | 1361 | struct agent_event *agent_find_event(const char *name, |
44760c20 JR |
1362 | enum lttng_loglevel_type loglevel_type, |
1363 | int loglevel_value, | |
1364 | const char *filter_expression, | |
1365 | struct agent *agt) | |
0475c50c DG |
1366 | { |
1367 | struct lttng_ht_node_str *node; | |
1368 | struct lttng_ht_iter iter; | |
4a4ab2c3 | 1369 | struct lttng_ht *ht; |
022d91ba | 1370 | struct agent_ht_key key; |
0475c50c | 1371 | |
a0377dfe FD |
1372 | LTTNG_ASSERT(name); |
1373 | LTTNG_ASSERT(agt); | |
1374 | LTTNG_ASSERT(agt->events); | |
48b7cdc2 | 1375 | ASSERT_RCU_READ_LOCKED(); |
0475c50c | 1376 | |
022d91ba | 1377 | ht = agt->events; |
4a4ab2c3 | 1378 | key.name = name; |
2106efa0 | 1379 | key.loglevel_value = loglevel_value; |
a9319624 | 1380 | key.loglevel_type = loglevel_type; |
6b10b3b0 | 1381 | key.filter_expression = filter_expression; |
4a4ab2c3 DG |
1382 | |
1383 | cds_lfht_lookup(ht->ht, ht->hash_fct((void *) name, lttng_ht_seed), | |
1384 | ht_match_event, &key, &iter.iter); | |
0475c50c DG |
1385 | node = lttng_ht_iter_get_node_str(&iter); |
1386 | if (node == NULL) { | |
1387 | goto error; | |
1388 | } | |
1389 | ||
022d91ba | 1390 | DBG3("Agent event found %s.", name); |
0114db0e | 1391 | return lttng::utils::container_of(node, &agent_event::node); |
0475c50c DG |
1392 | |
1393 | error: | |
a51e817b | 1394 | DBG3("Agent event NOT found %s.", name); |
0475c50c DG |
1395 | return NULL; |
1396 | } | |
1397 | ||
0475c50c | 1398 | /* |
022d91ba DG |
1399 | * Free given agent event. This event must not be globally visible at this |
1400 | * point (only expected to be used on failure just after event creation). After | |
1401 | * this call, the pointer is not usable anymore. | |
0475c50c | 1402 | */ |
022d91ba | 1403 | void agent_destroy_event(struct agent_event *event) |
0475c50c | 1404 | { |
a0377dfe | 1405 | LTTNG_ASSERT(event); |
0475c50c | 1406 | |
971da06a | 1407 | free(event->filter); |
8404118c | 1408 | free(event->filter_expression); |
51755dc8 | 1409 | free(event->exclusion); |
0475c50c DG |
1410 | free(event); |
1411 | } | |
1412 | ||
bdf64013 JG |
1413 | static |
1414 | void destroy_app_ctx_rcu(struct rcu_head *head) | |
1415 | { | |
1416 | struct agent_app_ctx *ctx = | |
0114db0e | 1417 | lttng::utils::container_of(head, &agent_app_ctx::rcu_node); |
bdf64013 JG |
1418 | |
1419 | destroy_app_ctx(ctx); | |
1420 | } | |
1421 | ||
0475c50c | 1422 | /* |
35ed21a5 | 1423 | * Destroy an agent completely. |
0475c50c | 1424 | */ |
022d91ba | 1425 | void agent_destroy(struct agent *agt) |
0475c50c DG |
1426 | { |
1427 | struct lttng_ht_node_str *node; | |
1428 | struct lttng_ht_iter iter; | |
bdf64013 | 1429 | struct agent_app_ctx *ctx; |
0475c50c | 1430 | |
a0377dfe | 1431 | LTTNG_ASSERT(agt); |
0475c50c | 1432 | |
022d91ba | 1433 | DBG3("Agent destroy"); |
0475c50c | 1434 | |
0475c50c | 1435 | rcu_read_lock(); |
022d91ba | 1436 | cds_lfht_for_each_entry(agt->events->ht, &iter.iter, node, node) { |
0475c50c | 1437 | int ret; |
022d91ba | 1438 | struct agent_event *event; |
29c0fd4d DG |
1439 | |
1440 | /* | |
bdf64013 JG |
1441 | * When destroying an event, we have to try to disable it on the |
1442 | * agent side so the event stops generating data. The return | |
1443 | * value is not important since we have to continue anyway | |
1444 | * destroying the object. | |
29c0fd4d | 1445 | */ |
0114db0e | 1446 | event = lttng::utils::container_of(node, &agent_event::node); |
022d91ba | 1447 | (void) agent_disable_event(event, agt->domain); |
0475c50c | 1448 | |
022d91ba | 1449 | ret = lttng_ht_del(agt->events, &iter); |
a0377dfe | 1450 | LTTNG_ASSERT(!ret); |
022d91ba | 1451 | call_rcu(&node->head, destroy_event_agent_rcu); |
0475c50c | 1452 | } |
0475c50c | 1453 | |
bdf64013 JG |
1454 | cds_list_for_each_entry_rcu(ctx, &agt->app_ctx_list, list_node) { |
1455 | (void) disable_context(ctx, agt->domain); | |
1456 | cds_list_del(&ctx->list_node); | |
1457 | call_rcu(&ctx->rcu_node, destroy_app_ctx_rcu); | |
1458 | } | |
1459 | rcu_read_unlock(); | |
3c339053 | 1460 | lttng_ht_destroy(agt->events); |
35ed21a5 | 1461 | free(agt); |
f20baf8e DG |
1462 | } |
1463 | ||
1464 | /* | |
6a4e4039 | 1465 | * Allocate agent_apps_ht_by_sock. |
f20baf8e | 1466 | */ |
6a4e4039 | 1467 | int agent_app_ht_alloc(void) |
f20baf8e | 1468 | { |
412d7227 SM |
1469 | the_agent_apps_ht_by_sock = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
1470 | return the_agent_apps_ht_by_sock ? 0 : -1; | |
6a4e4039 JG |
1471 | } |
1472 | ||
1473 | /* | |
1474 | * Destroy a agent application by socket. | |
1475 | */ | |
1476 | void agent_destroy_app_by_sock(int sock) | |
1477 | { | |
1478 | struct agent_app *app; | |
1479 | ||
a0377dfe | 1480 | LTTNG_ASSERT(sock >= 0); |
6a4e4039 JG |
1481 | |
1482 | /* | |
1483 | * Not finding an application is a very important error that should NEVER | |
1484 | * happen. The hash table deletion is ONLY done through this call when the | |
1485 | * main sessiond thread is torn down. | |
1486 | */ | |
1487 | rcu_read_lock(); | |
1488 | app = agent_find_app_by_sock(sock); | |
a0377dfe | 1489 | LTTNG_ASSERT(app); |
6a4e4039 JG |
1490 | |
1491 | /* RCU read side lock is assumed to be held by this function. */ | |
1492 | agent_delete_app(app); | |
1493 | ||
1494 | /* The application is freed in a RCU call but the socket is closed here. */ | |
1495 | agent_destroy_app(app); | |
1496 | rcu_read_unlock(); | |
1497 | } | |
1498 | ||
1499 | /* | |
1500 | * Clean-up the agent app hash table and destroy it. | |
1501 | */ | |
1502 | void agent_app_ht_clean(void) | |
1503 | { | |
1504 | struct lttng_ht_node_ulong *node; | |
1505 | struct lttng_ht_iter iter; | |
1506 | ||
412d7227 | 1507 | if (!the_agent_apps_ht_by_sock) { |
a433283e JG |
1508 | return; |
1509 | } | |
6a4e4039 | 1510 | rcu_read_lock(); |
412d7227 SM |
1511 | cds_lfht_for_each_entry( |
1512 | the_agent_apps_ht_by_sock->ht, &iter.iter, node, node) { | |
6a4e4039 JG |
1513 | struct agent_app *app; |
1514 | ||
0114db0e | 1515 | app = lttng::utils::container_of(node, &agent_app::node); |
6a4e4039 JG |
1516 | agent_destroy_app_by_sock(app->sock->fd); |
1517 | } | |
1518 | rcu_read_unlock(); | |
1519 | ||
412d7227 | 1520 | lttng_ht_destroy(the_agent_apps_ht_by_sock); |
f20baf8e DG |
1521 | } |
1522 | ||
1523 | /* | |
022d91ba | 1524 | * Update a agent application (given socket) using the given agent. |
f20baf8e DG |
1525 | * |
1526 | * Note that this function is most likely to be used with a tracing session | |
1527 | * thus the caller should make sure to hold the appropriate lock(s). | |
1528 | */ | |
733c9165 | 1529 | void agent_update(const struct agent *agt, const struct agent_app *app) |
f20baf8e DG |
1530 | { |
1531 | int ret; | |
022d91ba | 1532 | struct agent_event *event; |
f20baf8e | 1533 | struct lttng_ht_iter iter; |
bdf64013 | 1534 | struct agent_app_ctx *ctx; |
f20baf8e | 1535 | |
a0377dfe FD |
1536 | LTTNG_ASSERT(agt); |
1537 | LTTNG_ASSERT(app); | |
f20baf8e | 1538 | |
733c9165 | 1539 | DBG("Agent updating app: pid = %ld", (long) app->pid); |
f20baf8e DG |
1540 | |
1541 | rcu_read_lock(); | |
bdf64013 JG |
1542 | /* |
1543 | * We are in the registration path thus if the application is gone, | |
1544 | * there is a serious code flow error. | |
1545 | */ | |
733c9165 | 1546 | |
022d91ba | 1547 | cds_lfht_for_each_entry(agt->events->ht, &iter.iter, event, node.node) { |
f20baf8e | 1548 | /* Skip event if disabled. */ |
44760c20 | 1549 | if (!AGENT_EVENT_IS_ENABLED(event)) { |
f20baf8e DG |
1550 | continue; |
1551 | } | |
1552 | ||
f20baf8e DG |
1553 | ret = enable_event(app, event); |
1554 | if (ret != LTTNG_OK) { | |
022d91ba | 1555 | DBG2("Agent update unable to enable event %s on app pid: %d sock %d", |
f20baf8e DG |
1556 | event->name, app->pid, app->sock->fd); |
1557 | /* Let's try the others here and don't assume the app is dead. */ | |
1558 | continue; | |
1559 | } | |
1560 | } | |
bdf64013 JG |
1561 | |
1562 | cds_list_for_each_entry_rcu(ctx, &agt->app_ctx_list, list_node) { | |
1563 | ret = app_context_op(app, ctx, AGENT_CMD_APP_CTX_ENABLE); | |
1564 | if (ret != LTTNG_OK) { | |
1565 | DBG2("Agent update unable to add application context %s:%s on app pid: %d sock %d", | |
1566 | ctx->provider_name, ctx->ctx_name, | |
1567 | app->pid, app->sock->fd); | |
1568 | continue; | |
1569 | } | |
1570 | } | |
1571 | ||
f20baf8e | 1572 | rcu_read_unlock(); |
0475c50c | 1573 | } |
44760c20 JR |
1574 | |
1575 | /* | |
1576 | * Allocate the per-event notifier domain agent hash table. It is lazily | |
1577 | * populated as domains are used. | |
1578 | */ | |
1579 | int agent_by_event_notifier_domain_ht_create(void) | |
1580 | { | |
412d7227 SM |
1581 | the_trigger_agents_ht_by_domain = lttng_ht_new(0, LTTNG_HT_TYPE_U64); |
1582 | return the_trigger_agents_ht_by_domain ? 0 : -1; | |
44760c20 JR |
1583 | } |
1584 | ||
1585 | /* | |
1586 | * Clean-up the per-event notifier domain agent hash table and destroy it. | |
1587 | */ | |
1588 | void agent_by_event_notifier_domain_ht_destroy(void) | |
1589 | { | |
1590 | struct lttng_ht_node_u64 *node; | |
1591 | struct lttng_ht_iter iter; | |
1592 | ||
412d7227 | 1593 | if (!the_trigger_agents_ht_by_domain) { |
44760c20 JR |
1594 | return; |
1595 | } | |
1596 | ||
1597 | rcu_read_lock(); | |
412d7227 SM |
1598 | cds_lfht_for_each_entry(the_trigger_agents_ht_by_domain->ht, |
1599 | &iter.iter, node, node) { | |
44760c20 | 1600 | struct agent *agent = |
0114db0e | 1601 | lttng::utils::container_of(node, &agent::node); |
44760c20 | 1602 | const int ret = lttng_ht_del( |
412d7227 | 1603 | the_trigger_agents_ht_by_domain, &iter); |
44760c20 | 1604 | |
a0377dfe | 1605 | LTTNG_ASSERT(ret == 0); |
44760c20 JR |
1606 | agent_destroy(agent); |
1607 | } | |
1608 | ||
1609 | rcu_read_unlock(); | |
412d7227 | 1610 | lttng_ht_destroy(the_trigger_agents_ht_by_domain); |
44760c20 JR |
1611 | } |
1612 | ||
1613 | struct agent *agent_find_by_event_notifier_domain( | |
1614 | enum lttng_domain_type domain_type) | |
1615 | { | |
1616 | struct agent *agt = NULL; | |
1617 | struct lttng_ht_node_u64 *node; | |
1618 | struct lttng_ht_iter iter; | |
1619 | const uint64_t key = (uint64_t) domain_type; | |
1620 | ||
a0377dfe | 1621 | LTTNG_ASSERT(the_trigger_agents_ht_by_domain); |
44760c20 JR |
1622 | |
1623 | DBG3("Per-event notifier domain agent lookup for domain '%s'", | |
1624 | lttng_domain_type_str(domain_type)); | |
1625 | ||
412d7227 | 1626 | lttng_ht_lookup(the_trigger_agents_ht_by_domain, &key, &iter); |
44760c20 JR |
1627 | node = lttng_ht_iter_get_node_u64(&iter); |
1628 | if (!node) { | |
1629 | goto end; | |
1630 | } | |
1631 | ||
0114db0e | 1632 | agt = lttng::utils::container_of(node, &agent::node); |
44760c20 JR |
1633 | |
1634 | end: | |
1635 | return agt; | |
1636 | } |