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 JR |
13 | #include <lttng/event-rule/event-rule.h> |
14 | #include <lttng/event-rule/event-rule-internal.h> | |
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> |
44760c20 | 20 | #include <lttng/domain-internal.h> |
85b05318 | 21 | #include <lttng/log-level-rule-internal.h> |
44760c20 | 22 | |
0475c50c | 23 | #include <common/common.h> |
022d91ba | 24 | #include <common/sessiond-comm/agent.h> |
0475c50c | 25 | |
f263b7fd JD |
26 | #include <common/compat/endian.h> |
27 | ||
022d91ba | 28 | #include "agent.h" |
f20baf8e | 29 | #include "ust-app.h" |
0475c50c | 30 | #include "utils.h" |
6712db61 | 31 | #include "common/error.h" |
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 | */ | |
42 | struct agent_app_ctx { | |
43 | char *provider_name; | |
44 | char *ctx_name; | |
45 | ||
46 | /* agent_app_ctx are part of the agent app_ctx_list. */ | |
47 | struct cds_list_head list_node; | |
48 | ||
49 | /* For call_rcu teardown. */ | |
50 | struct rcu_head rcu_node; | |
51 | }; | |
52 | ||
23c2bd47 JG |
53 | /* |
54 | * Human readable agent return code. | |
55 | */ | |
7966af57 SM |
56 | static |
57 | const char *lttcomm_agent_ret_code_str(lttcomm_agent_ret_code code) | |
58 | { | |
59 | switch (code) { | |
60 | case AGENT_RET_CODE_SUCCESS: | |
61 | return "Success"; | |
62 | case AGENT_RET_CODE_INVALID: | |
63 | return "Invalid command"; | |
64 | case AGENT_RET_CODE_UNKNOWN_NAME: | |
65 | return "Unknown logger name"; | |
66 | default: | |
67 | return "Unknown code"; | |
68 | } | |
23c2bd47 JG |
69 | }; |
70 | ||
71 | static | |
72 | void log_reply_code(uint32_t in_reply_ret_code) | |
73 | { | |
74 | int level = PRINT_DBG3; | |
75 | /* | |
76 | * reply_ret_code and in_reply_ret_code are kept separate to have a | |
77 | * sanitized value (used to retrieve the human readable string) and the | |
78 | * original value which is logged as-is. | |
79 | */ | |
80 | uint32_t reply_ret_code = in_reply_ret_code; | |
81 | ||
82 | if (reply_ret_code < AGENT_RET_CODE_SUCCESS || | |
83 | reply_ret_code >= AGENT_RET_CODE_NR) { | |
84 | reply_ret_code = AGENT_RET_CODE_NR; | |
85 | level = PRINT_ERR; | |
86 | } | |
87 | ||
7966af57 SM |
88 | LOG(level, "Agent replied with retcode: %s (%" PRIu32 ")", |
89 | lttcomm_agent_ret_code_str((lttcomm_agent_ret_code) reply_ret_code), | |
23c2bd47 JG |
90 | in_reply_ret_code); |
91 | } | |
0475c50c | 92 | |
4a4ab2c3 DG |
93 | /* |
94 | * Match function for the events hash table lookup by name. | |
95 | */ | |
96 | static int ht_match_event_by_name(struct cds_lfht_node *node, | |
97 | const void *_key) | |
98 | { | |
022d91ba DG |
99 | struct agent_event *event; |
100 | const struct agent_ht_key *key; | |
4a4ab2c3 | 101 | |
a0377dfe FD |
102 | LTTNG_ASSERT(node); |
103 | LTTNG_ASSERT(_key); | |
4a4ab2c3 | 104 | |
022d91ba | 105 | event = caa_container_of(node, struct agent_event, node.node); |
7966af57 | 106 | key = (agent_ht_key *) _key; |
4a4ab2c3 DG |
107 | |
108 | /* Match 1 elements of the key: name. */ | |
109 | ||
110 | /* Event name */ | |
111 | if (strncmp(event->name, key->name, sizeof(event->name)) != 0) { | |
112 | goto no_match; | |
113 | } | |
114 | /* Match. */ | |
115 | return 1; | |
116 | ||
117 | no_match: | |
118 | return 0; | |
119 | } | |
120 | ||
121 | /* | |
44760c20 JR |
122 | * Match function for the events hash table lookup by name, log level and |
123 | * filter expression. | |
4a4ab2c3 DG |
124 | */ |
125 | static int ht_match_event(struct cds_lfht_node *node, | |
126 | const void *_key) | |
127 | { | |
022d91ba DG |
128 | struct agent_event *event; |
129 | const struct agent_ht_key *key; | |
19a97244 | 130 | int ll_match; |
4a4ab2c3 | 131 | |
a0377dfe FD |
132 | LTTNG_ASSERT(node); |
133 | LTTNG_ASSERT(_key); | |
4a4ab2c3 | 134 | |
022d91ba | 135 | event = caa_container_of(node, struct agent_event, node.node); |
7966af57 | 136 | key = (agent_ht_key *) _key; |
4a4ab2c3 DG |
137 | |
138 | /* Match 2 elements of the key: name and loglevel. */ | |
139 | ||
140 | /* Event name */ | |
141 | if (strncmp(event->name, key->name, sizeof(event->name)) != 0) { | |
142 | goto no_match; | |
143 | } | |
144 | ||
a9319624 | 145 | /* Event loglevel value and type. */ |
19a97244 PP |
146 | ll_match = loglevels_match(event->loglevel_type, |
147 | event->loglevel_value, key->loglevel_type, | |
148 | key->loglevel_value, LTTNG_EVENT_LOGLEVEL_ALL); | |
149 | ||
150 | if (!ll_match) { | |
4a4ab2c3 DG |
151 | goto no_match; |
152 | } | |
a9319624 | 153 | |
6b10b3b0 | 154 | /* Filter expression */ |
d42bc3c8 | 155 | if (!!event->filter_expression != !!key->filter_expression) { |
71e147d0 | 156 | /* One has a filter expression, the other does not */ |
6b10b3b0 AM |
157 | goto no_match; |
158 | } | |
159 | ||
71e147d0 PP |
160 | if (event->filter_expression) { |
161 | if (strncmp(event->filter_expression, key->filter_expression, | |
162 | strlen(event->filter_expression)) != 0) { | |
163 | goto no_match; | |
164 | } | |
165 | } | |
166 | ||
4a4ab2c3 DG |
167 | return 1; |
168 | ||
169 | no_match: | |
170 | return 0; | |
171 | } | |
172 | ||
173 | /* | |
022d91ba | 174 | * Add unique agent event based on the event name and loglevel. |
4a4ab2c3 | 175 | */ |
022d91ba DG |
176 | static void add_unique_agent_event(struct lttng_ht *ht, |
177 | struct agent_event *event) | |
4a4ab2c3 DG |
178 | { |
179 | struct cds_lfht_node *node_ptr; | |
022d91ba | 180 | struct agent_ht_key key; |
4a4ab2c3 | 181 | |
a0377dfe FD |
182 | LTTNG_ASSERT(ht); |
183 | LTTNG_ASSERT(ht->ht); | |
184 | LTTNG_ASSERT(event); | |
4a4ab2c3 DG |
185 | |
186 | key.name = event->name; | |
2106efa0 | 187 | key.loglevel_value = event->loglevel_value; |
a9319624 | 188 | key.loglevel_type = event->loglevel_type; |
6b10b3b0 | 189 | key.filter_expression = event->filter_expression; |
4a4ab2c3 DG |
190 | |
191 | node_ptr = cds_lfht_add_unique(ht->ht, | |
192 | ht->hash_fct(event->node.key, lttng_ht_seed), | |
193 | ht_match_event, &key, &event->node.node); | |
a0377dfe | 194 | LTTNG_ASSERT(node_ptr == &event->node.node); |
4a4ab2c3 DG |
195 | } |
196 | ||
0475c50c | 197 | /* |
022d91ba | 198 | * URCU delayed agent event reclaim. |
0475c50c | 199 | */ |
022d91ba | 200 | static void destroy_event_agent_rcu(struct rcu_head *head) |
0475c50c DG |
201 | { |
202 | struct lttng_ht_node_str *node = | |
203 | caa_container_of(head, struct lttng_ht_node_str, head); | |
022d91ba DG |
204 | struct agent_event *event = |
205 | caa_container_of(node, struct agent_event, node); | |
0475c50c | 206 | |
992febc7 | 207 | agent_destroy_event(event); |
0475c50c DG |
208 | } |
209 | ||
f20baf8e | 210 | /* |
022d91ba | 211 | * URCU delayed agent app reclaim. |
f20baf8e | 212 | */ |
022d91ba | 213 | static void destroy_app_agent_rcu(struct rcu_head *head) |
f20baf8e DG |
214 | { |
215 | struct lttng_ht_node_ulong *node = | |
216 | caa_container_of(head, struct lttng_ht_node_ulong, head); | |
022d91ba DG |
217 | struct agent_app *app = |
218 | caa_container_of(node, struct agent_app, node); | |
f20baf8e DG |
219 | |
220 | free(app); | |
221 | } | |
222 | ||
223 | /* | |
022d91ba DG |
224 | * Communication with the agent. Send the message header to the given socket in |
225 | * big endian. | |
f20baf8e DG |
226 | * |
227 | * Return 0 on success or else a negative errno message of sendmsg() op. | |
228 | */ | |
229 | static int send_header(struct lttcomm_sock *sock, uint64_t data_size, | |
230 | uint32_t cmd, uint32_t cmd_version) | |
231 | { | |
232 | int ret; | |
233 | ssize_t size; | |
022d91ba | 234 | struct lttcomm_agent_hdr msg; |
f20baf8e | 235 | |
a0377dfe | 236 | LTTNG_ASSERT(sock); |
f20baf8e | 237 | |
53efb85a | 238 | memset(&msg, 0, sizeof(msg)); |
f20baf8e DG |
239 | msg.data_size = htobe64(data_size); |
240 | msg.cmd = htobe32(cmd); | |
241 | msg.cmd_version = htobe32(cmd_version); | |
242 | ||
243 | size = sock->ops->sendmsg(sock, &msg, sizeof(msg), 0); | |
244 | if (size < sizeof(msg)) { | |
245 | ret = -errno; | |
246 | goto error; | |
247 | } | |
248 | ret = 0; | |
249 | ||
250 | error: | |
251 | return ret; | |
252 | } | |
253 | ||
254 | /* | |
022d91ba DG |
255 | * Communication call with the agent. Send the payload to the given socket. The |
256 | * header MUST be sent prior to this call. | |
f20baf8e DG |
257 | * |
258 | * Return 0 on success or else a negative errno value of sendmsg() op. | |
259 | */ | |
bdf64013 | 260 | static int send_payload(struct lttcomm_sock *sock, const void *data, |
f20baf8e DG |
261 | size_t size) |
262 | { | |
263 | int ret; | |
264 | ssize_t len; | |
265 | ||
a0377dfe FD |
266 | LTTNG_ASSERT(sock); |
267 | LTTNG_ASSERT(data); | |
f20baf8e DG |
268 | |
269 | len = sock->ops->sendmsg(sock, data, size, 0); | |
270 | if (len < size) { | |
271 | ret = -errno; | |
272 | goto error; | |
273 | } | |
274 | ret = 0; | |
275 | ||
276 | error: | |
277 | return ret; | |
278 | } | |
279 | ||
280 | /* | |
022d91ba DG |
281 | * Communication call with the agent. Receive reply from the agent using the |
282 | * given socket. | |
f20baf8e DG |
283 | * |
284 | * Return 0 on success or else a negative errno value from recvmsg() op. | |
285 | */ | |
286 | static int recv_reply(struct lttcomm_sock *sock, void *buf, size_t size) | |
287 | { | |
288 | int ret; | |
289 | ssize_t len; | |
290 | ||
a0377dfe FD |
291 | LTTNG_ASSERT(sock); |
292 | LTTNG_ASSERT(buf); | |
f20baf8e DG |
293 | |
294 | len = sock->ops->recvmsg(sock, buf, size, 0); | |
295 | if (len < size) { | |
296 | ret = -errno; | |
297 | goto error; | |
298 | } | |
299 | ret = 0; | |
300 | ||
301 | error: | |
302 | return ret; | |
303 | } | |
304 | ||
3c6a091f | 305 | /* |
428de77a | 306 | * Internal event listing for a given app. Populate events. |
3c6a091f DG |
307 | * |
308 | * Return number of element in the list or else a negative LTTNG_ERR* code. | |
428de77a MD |
309 | * On success, the caller is responsible for freeing the memory |
310 | * allocated for "events". | |
3c6a091f | 311 | */ |
022d91ba | 312 | static ssize_t list_events(struct agent_app *app, struct lttng_event **events) |
3c6a091f DG |
313 | { |
314 | int ret, i, len = 0, offset = 0; | |
315 | uint32_t nb_event; | |
316 | size_t data_size; | |
d84af1a4 | 317 | uint32_t reply_ret_code; |
3c6a091f | 318 | struct lttng_event *tmp_events = NULL; |
022d91ba DG |
319 | struct lttcomm_agent_list_reply *reply = NULL; |
320 | struct lttcomm_agent_list_reply_hdr reply_hdr; | |
3c6a091f | 321 | |
a0377dfe FD |
322 | LTTNG_ASSERT(app); |
323 | LTTNG_ASSERT(app->sock); | |
324 | LTTNG_ASSERT(events); | |
3c6a091f | 325 | |
022d91ba | 326 | DBG2("Agent listing events for app pid: %d and socket %d", app->pid, |
3c6a091f DG |
327 | app->sock->fd); |
328 | ||
022d91ba | 329 | ret = send_header(app->sock, 0, AGENT_CMD_LIST, 0); |
3c6a091f DG |
330 | if (ret < 0) { |
331 | goto error_io; | |
332 | } | |
333 | ||
334 | /* Get list header so we know how much we'll receive. */ | |
335 | ret = recv_reply(app->sock, &reply_hdr, sizeof(reply_hdr)); | |
336 | if (ret < 0) { | |
337 | goto error_io; | |
338 | } | |
339 | ||
d84af1a4 JG |
340 | reply_ret_code = be32toh(reply_hdr.ret_code); |
341 | log_reply_code(reply_ret_code); | |
342 | switch (reply_ret_code) { | |
022d91ba | 343 | case AGENT_RET_CODE_SUCCESS: |
3c6a091f DG |
344 | data_size = be32toh(reply_hdr.data_size) + sizeof(*reply); |
345 | break; | |
346 | default: | |
3bd9aaeb | 347 | ret = LTTNG_ERR_UNK; |
3c6a091f DG |
348 | goto error; |
349 | } | |
350 | ||
7966af57 | 351 | reply = (lttcomm_agent_list_reply *) zmalloc(data_size); |
3c6a091f DG |
352 | if (!reply) { |
353 | ret = LTTNG_ERR_NOMEM; | |
354 | goto error; | |
355 | } | |
356 | ||
357 | /* Get the list with the appropriate data size. */ | |
358 | ret = recv_reply(app->sock, reply, data_size); | |
359 | if (ret < 0) { | |
360 | goto error_io; | |
361 | } | |
362 | ||
363 | nb_event = be32toh(reply->nb_event); | |
7966af57 | 364 | tmp_events = (lttng_event *) zmalloc(sizeof(*tmp_events) * nb_event); |
3c6a091f DG |
365 | if (!tmp_events) { |
366 | ret = LTTNG_ERR_NOMEM; | |
367 | goto error; | |
368 | } | |
369 | ||
370 | for (i = 0; i < nb_event; i++) { | |
371 | offset += len; | |
0a85e7a3 MD |
372 | if (lttng_strncpy(tmp_events[i].name, reply->payload + offset, |
373 | sizeof(tmp_events[i].name))) { | |
374 | ret = LTTNG_ERR_INVALID; | |
375 | goto error; | |
376 | } | |
3c6a091f DG |
377 | tmp_events[i].pid = app->pid; |
378 | tmp_events[i].enabled = -1; | |
379 | len = strlen(reply->payload + offset) + 1; | |
380 | } | |
381 | ||
382 | *events = tmp_events; | |
383 | ||
384 | free(reply); | |
385 | return nb_event; | |
386 | ||
387 | error_io: | |
388 | ret = LTTNG_ERR_UST_LIST_FAIL; | |
389 | error: | |
390 | free(reply); | |
391 | free(tmp_events); | |
392 | return -ret; | |
393 | ||
394 | } | |
395 | ||
f20baf8e | 396 | /* |
022d91ba DG |
397 | * Internal enable agent event on a agent application. This function |
398 | * communicates with the agent to enable a given event. | |
f20baf8e DG |
399 | * |
400 | * Return LTTNG_OK on success or else a LTTNG_ERR* code. | |
401 | */ | |
733c9165 | 402 | static int enable_event(const struct agent_app *app, struct agent_event *event) |
f20baf8e DG |
403 | { |
404 | int ret; | |
a0ba721c | 405 | char *bytes_to_send; |
f20baf8e | 406 | uint64_t data_size; |
a0ba721c | 407 | size_t filter_expression_length; |
f4f9d4db | 408 | uint32_t reply_ret_code; |
bdf64013 | 409 | struct lttcomm_agent_enable_event msg; |
022d91ba | 410 | struct lttcomm_agent_generic_reply reply; |
f20baf8e | 411 | |
a0377dfe FD |
412 | LTTNG_ASSERT(app); |
413 | LTTNG_ASSERT(app->sock); | |
414 | LTTNG_ASSERT(event); | |
f20baf8e | 415 | |
022d91ba | 416 | DBG2("Agent enabling event %s for app pid: %d and socket %d", event->name, |
f20baf8e DG |
417 | app->pid, app->sock->fd); |
418 | ||
a0ba721c AM |
419 | /* |
420 | * Calculate the payload's size, which is the fixed-size struct followed | |
421 | * by the variable-length filter expression (+1 for the ending \0). | |
422 | */ | |
423 | if (!event->filter_expression) { | |
424 | filter_expression_length = 0; | |
425 | } else { | |
426 | filter_expression_length = strlen(event->filter_expression) + 1; | |
427 | } | |
428 | data_size = sizeof(msg) + filter_expression_length; | |
f20baf8e | 429 | |
53efb85a | 430 | memset(&msg, 0, sizeof(msg)); |
a9bfd666 JG |
431 | msg.loglevel_value = htobe32(event->loglevel_value); |
432 | msg.loglevel_type = htobe32(event->loglevel_type); | |
bb45c03e MD |
433 | if (lttng_strncpy(msg.name, event->name, sizeof(msg.name))) { |
434 | ret = LTTNG_ERR_INVALID; | |
435 | goto error; | |
436 | } | |
a9bfd666 | 437 | msg.filter_expression_length = htobe32(filter_expression_length); |
a0ba721c | 438 | |
bb45c03e MD |
439 | ret = send_header(app->sock, data_size, AGENT_CMD_ENABLE, 0); |
440 | if (ret < 0) { | |
441 | goto error_io; | |
442 | } | |
443 | ||
7966af57 | 444 | bytes_to_send = (char *) zmalloc(data_size); |
a0ba721c AM |
445 | if (!bytes_to_send) { |
446 | ret = LTTNG_ERR_NOMEM; | |
447 | goto error; | |
448 | } | |
449 | ||
450 | memcpy(bytes_to_send, &msg, sizeof(msg)); | |
451 | if (filter_expression_length > 0) { | |
452 | memcpy(bytes_to_send + sizeof(msg), event->filter_expression, | |
453 | filter_expression_length); | |
454 | } | |
455 | ||
456 | ret = send_payload(app->sock, bytes_to_send, data_size); | |
457 | free(bytes_to_send); | |
f20baf8e DG |
458 | if (ret < 0) { |
459 | goto error_io; | |
460 | } | |
461 | ||
462 | ret = recv_reply(app->sock, &reply, sizeof(reply)); | |
463 | if (ret < 0) { | |
464 | goto error_io; | |
465 | } | |
466 | ||
f4f9d4db JG |
467 | reply_ret_code = be32toh(reply.ret_code); |
468 | log_reply_code(reply_ret_code); | |
469 | switch (reply_ret_code) { | |
022d91ba | 470 | case AGENT_RET_CODE_SUCCESS: |
f20baf8e | 471 | break; |
022d91ba | 472 | case AGENT_RET_CODE_UNKNOWN_NAME: |
f20baf8e DG |
473 | ret = LTTNG_ERR_UST_EVENT_NOT_FOUND; |
474 | goto error; | |
475 | default: | |
3bd9aaeb | 476 | ret = LTTNG_ERR_UNK; |
f20baf8e DG |
477 | goto error; |
478 | } | |
479 | ||
480 | return LTTNG_OK; | |
481 | ||
482 | error_io: | |
483 | ret = LTTNG_ERR_UST_ENABLE_FAIL; | |
484 | error: | |
485 | return ret; | |
486 | } | |
487 | ||
bdf64013 JG |
488 | /* |
489 | * Send Pascal-style string. Size is sent as a 32-bit big endian integer. | |
490 | */ | |
491 | static | |
492 | int send_pstring(struct lttcomm_sock *sock, const char *str, uint32_t len) | |
493 | { | |
494 | int ret; | |
495 | uint32_t len_be; | |
496 | ||
497 | len_be = htobe32(len); | |
498 | ret = send_payload(sock, &len_be, sizeof(len_be)); | |
499 | if (ret) { | |
500 | goto end; | |
501 | } | |
502 | ||
503 | ret = send_payload(sock, str, len); | |
504 | if (ret) { | |
505 | goto end; | |
506 | } | |
507 | end: | |
508 | return ret; | |
509 | } | |
510 | ||
511 | /* | |
512 | * Internal enable application context on an agent application. This function | |
513 | * communicates with the agent to enable a given application context. | |
514 | * | |
515 | * Return LTTNG_OK on success or else a LTTNG_ERR* code. | |
516 | */ | |
733c9165 JG |
517 | static int app_context_op(const struct agent_app *app, |
518 | const struct agent_app_ctx *ctx, enum lttcomm_agent_command cmd) | |
bdf64013 JG |
519 | { |
520 | int ret; | |
521 | uint32_t reply_ret_code; | |
522 | struct lttcomm_agent_generic_reply reply; | |
523 | size_t app_ctx_provider_name_len, app_ctx_name_len, data_size; | |
524 | ||
a0377dfe FD |
525 | LTTNG_ASSERT(app); |
526 | LTTNG_ASSERT(app->sock); | |
527 | LTTNG_ASSERT(ctx); | |
528 | LTTNG_ASSERT(cmd == AGENT_CMD_APP_CTX_ENABLE || | |
bdf64013 JG |
529 | cmd == AGENT_CMD_APP_CTX_DISABLE); |
530 | ||
531 | DBG2("Agent %s application %s:%s for app pid: %d and socket %d", | |
532 | cmd == AGENT_CMD_APP_CTX_ENABLE ? "enabling" : "disabling", | |
533 | ctx->provider_name, ctx->ctx_name, | |
534 | app->pid, app->sock->fd); | |
535 | ||
536 | /* | |
537 | * Calculate the payload's size, which consists of the size (u32, BE) | |
538 | * of the provider name, the NULL-terminated provider name string, the | |
539 | * size (u32, BE) of the context name, followed by the NULL-terminated | |
540 | * context name string. | |
541 | */ | |
542 | app_ctx_provider_name_len = strlen(ctx->provider_name) + 1; | |
543 | app_ctx_name_len = strlen(ctx->ctx_name) + 1; | |
544 | data_size = sizeof(uint32_t) + app_ctx_provider_name_len + | |
545 | sizeof(uint32_t) + app_ctx_name_len; | |
546 | ||
547 | ret = send_header(app->sock, data_size, cmd, 0); | |
548 | if (ret < 0) { | |
549 | goto error_io; | |
550 | } | |
551 | ||
552 | if (app_ctx_provider_name_len > UINT32_MAX || | |
553 | app_ctx_name_len > UINT32_MAX) { | |
554 | ERR("Application context name > MAX_UINT32"); | |
555 | ret = LTTNG_ERR_INVALID; | |
556 | goto error; | |
557 | } | |
558 | ||
559 | ret = send_pstring(app->sock, ctx->provider_name, | |
560 | (uint32_t) app_ctx_provider_name_len); | |
561 | if (ret < 0) { | |
562 | goto error_io; | |
563 | } | |
564 | ||
565 | ret = send_pstring(app->sock, ctx->ctx_name, | |
566 | (uint32_t) app_ctx_name_len); | |
567 | if (ret < 0) { | |
568 | goto error_io; | |
569 | } | |
570 | ||
571 | ret = recv_reply(app->sock, &reply, sizeof(reply)); | |
572 | if (ret < 0) { | |
573 | goto error_io; | |
574 | } | |
575 | ||
576 | reply_ret_code = be32toh(reply.ret_code); | |
577 | log_reply_code(reply_ret_code); | |
578 | switch (reply_ret_code) { | |
579 | case AGENT_RET_CODE_SUCCESS: | |
580 | break; | |
581 | default: | |
582 | ret = LTTNG_ERR_UNK; | |
583 | goto error; | |
584 | } | |
585 | ||
586 | return LTTNG_OK; | |
587 | ||
588 | error_io: | |
589 | ret = LTTNG_ERR_UST_ENABLE_FAIL; | |
590 | error: | |
591 | return ret; | |
592 | } | |
593 | ||
f20baf8e | 594 | /* |
022d91ba DG |
595 | * Internal disable agent event call on a agent application. This function |
596 | * communicates with the agent to disable a given event. | |
f20baf8e DG |
597 | * |
598 | * Return LTTNG_OK on success or else a LTTNG_ERR* code. | |
599 | */ | |
022d91ba | 600 | static int disable_event(struct agent_app *app, struct agent_event *event) |
f20baf8e DG |
601 | { |
602 | int ret; | |
603 | uint64_t data_size; | |
517992f8 | 604 | uint32_t reply_ret_code; |
bdf64013 | 605 | struct lttcomm_agent_disable_event msg; |
022d91ba | 606 | struct lttcomm_agent_generic_reply reply; |
f20baf8e | 607 | |
a0377dfe FD |
608 | LTTNG_ASSERT(app); |
609 | LTTNG_ASSERT(app->sock); | |
610 | LTTNG_ASSERT(event); | |
f20baf8e | 611 | |
022d91ba | 612 | DBG2("Agent disabling event %s for app pid: %d and socket %d", event->name, |
f20baf8e DG |
613 | app->pid, app->sock->fd); |
614 | ||
615 | data_size = sizeof(msg); | |
63be730a MD |
616 | memset(&msg, 0, sizeof(msg)); |
617 | if (lttng_strncpy(msg.name, event->name, sizeof(msg.name))) { | |
618 | ret = LTTNG_ERR_INVALID; | |
619 | goto error; | |
620 | } | |
f20baf8e | 621 | |
022d91ba | 622 | ret = send_header(app->sock, data_size, AGENT_CMD_DISABLE, 0); |
f20baf8e DG |
623 | if (ret < 0) { |
624 | goto error_io; | |
625 | } | |
626 | ||
f20baf8e DG |
627 | ret = send_payload(app->sock, &msg, sizeof(msg)); |
628 | if (ret < 0) { | |
629 | goto error_io; | |
630 | } | |
631 | ||
632 | ret = recv_reply(app->sock, &reply, sizeof(reply)); | |
633 | if (ret < 0) { | |
634 | goto error_io; | |
635 | } | |
636 | ||
517992f8 JG |
637 | reply_ret_code = be32toh(reply.ret_code); |
638 | log_reply_code(reply_ret_code); | |
639 | switch (reply_ret_code) { | |
022d91ba DG |
640 | case AGENT_RET_CODE_SUCCESS: |
641 | break; | |
642 | case AGENT_RET_CODE_UNKNOWN_NAME: | |
643 | ret = LTTNG_ERR_UST_EVENT_NOT_FOUND; | |
644 | goto error; | |
645 | default: | |
3bd9aaeb | 646 | ret = LTTNG_ERR_UNK; |
022d91ba | 647 | goto error; |
f20baf8e DG |
648 | } |
649 | ||
650 | return LTTNG_OK; | |
651 | ||
652 | error_io: | |
653 | ret = LTTNG_ERR_UST_DISABLE_FAIL; | |
654 | error: | |
655 | return ret; | |
656 | } | |
657 | ||
1b500e7a | 658 | /* |
022d91ba | 659 | * Send back the registration DONE command to a given agent application. |
1b500e7a DG |
660 | * |
661 | * Return 0 on success or else a negative value. | |
662 | */ | |
022d91ba | 663 | int agent_send_registration_done(struct agent_app *app) |
1b500e7a | 664 | { |
a0377dfe FD |
665 | LTTNG_ASSERT(app); |
666 | LTTNG_ASSERT(app->sock); | |
1b500e7a | 667 | |
022d91ba | 668 | DBG("Agent sending registration done to app socket %d", app->sock->fd); |
1b500e7a | 669 | |
b26d1f5c | 670 | return send_header(app->sock, 0, AGENT_CMD_REG_DONE, 0); |
1b500e7a DG |
671 | } |
672 | ||
f20baf8e | 673 | /* |
022d91ba | 674 | * Enable agent event on every agent applications registered with the session |
f20baf8e DG |
675 | * daemon. |
676 | * | |
677 | * Return LTTNG_OK on success or else a LTTNG_ERR* code. | |
678 | */ | |
fefd409b DG |
679 | int agent_enable_event(struct agent_event *event, |
680 | enum lttng_domain_type domain) | |
f20baf8e DG |
681 | { |
682 | int ret; | |
022d91ba | 683 | struct agent_app *app; |
f20baf8e DG |
684 | struct lttng_ht_iter iter; |
685 | ||
a0377dfe | 686 | LTTNG_ASSERT(event); |
f20baf8e DG |
687 | |
688 | rcu_read_lock(); | |
689 | ||
412d7227 | 690 | cds_lfht_for_each_entry(the_agent_apps_ht_by_sock->ht, &iter.iter, app, |
f20baf8e | 691 | node.node) { |
fefd409b DG |
692 | if (app->domain != domain) { |
693 | continue; | |
694 | } | |
695 | ||
022d91ba | 696 | /* Enable event on agent application through TCP socket. */ |
f20baf8e DG |
697 | ret = enable_event(app, event); |
698 | if (ret != LTTNG_OK) { | |
699 | goto error; | |
700 | } | |
f20baf8e DG |
701 | } |
702 | ||
44760c20 | 703 | event->enabled_count++; |
f20baf8e DG |
704 | ret = LTTNG_OK; |
705 | ||
706 | error: | |
707 | rcu_read_unlock(); | |
708 | return ret; | |
709 | } | |
710 | ||
bdf64013 JG |
711 | static |
712 | void destroy_app_ctx(struct agent_app_ctx *ctx) | |
713 | { | |
714 | free(ctx->provider_name); | |
715 | free(ctx->ctx_name); | |
716 | free(ctx); | |
717 | } | |
718 | ||
719 | static | |
df4f5a87 | 720 | struct agent_app_ctx *create_app_ctx(const struct lttng_event_context *ctx) |
bdf64013 JG |
721 | { |
722 | struct agent_app_ctx *agent_ctx = NULL; | |
723 | ||
724 | if (!ctx) { | |
725 | goto end; | |
726 | } | |
727 | ||
a0377dfe | 728 | LTTNG_ASSERT(ctx->ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT); |
7966af57 | 729 | agent_ctx = (agent_app_ctx *) zmalloc(sizeof(*ctx)); |
bdf64013 JG |
730 | if (!agent_ctx) { |
731 | goto end; | |
732 | } | |
733 | ||
734 | agent_ctx->provider_name = strdup(ctx->u.app_ctx.provider_name); | |
735 | agent_ctx->ctx_name = strdup(ctx->u.app_ctx.ctx_name); | |
736 | if (!agent_ctx->provider_name || !agent_ctx->ctx_name) { | |
737 | destroy_app_ctx(agent_ctx); | |
738 | agent_ctx = NULL; | |
739 | } | |
740 | end: | |
741 | return agent_ctx; | |
742 | } | |
743 | ||
744 | /* | |
745 | * Enable agent context on every agent applications registered with the session | |
746 | * daemon. | |
747 | * | |
748 | * Return LTTNG_OK on success or else a LTTNG_ERR* code. | |
749 | */ | |
df4f5a87 | 750 | int agent_enable_context(const struct lttng_event_context *ctx, |
bdf64013 JG |
751 | enum lttng_domain_type domain) |
752 | { | |
753 | int ret; | |
754 | struct agent_app *app; | |
755 | struct lttng_ht_iter iter; | |
756 | ||
a0377dfe | 757 | LTTNG_ASSERT(ctx); |
bdf64013 JG |
758 | if (ctx->ctx != LTTNG_EVENT_CONTEXT_APP_CONTEXT) { |
759 | ret = LTTNG_ERR_INVALID; | |
760 | goto error; | |
761 | } | |
762 | ||
763 | rcu_read_lock(); | |
764 | ||
412d7227 | 765 | cds_lfht_for_each_entry(the_agent_apps_ht_by_sock->ht, &iter.iter, app, |
bdf64013 JG |
766 | node.node) { |
767 | struct agent_app_ctx *agent_ctx; | |
768 | ||
769 | if (app->domain != domain) { | |
770 | continue; | |
771 | } | |
772 | ||
773 | agent_ctx = create_app_ctx(ctx); | |
774 | if (!agent_ctx) { | |
a33c2651 | 775 | ret = LTTNG_ERR_NOMEM; |
bdf64013 JG |
776 | goto error_unlock; |
777 | } | |
778 | ||
779 | /* Enable event on agent application through TCP socket. */ | |
780 | ret = app_context_op(app, agent_ctx, AGENT_CMD_APP_CTX_ENABLE); | |
c12618b5 | 781 | destroy_app_ctx(agent_ctx); |
bdf64013 | 782 | if (ret != LTTNG_OK) { |
bdf64013 JG |
783 | goto error_unlock; |
784 | } | |
785 | } | |
786 | ||
787 | ret = LTTNG_OK; | |
788 | ||
789 | error_unlock: | |
790 | rcu_read_unlock(); | |
791 | error: | |
792 | return ret; | |
793 | } | |
794 | ||
f20baf8e | 795 | /* |
bdf64013 | 796 | * Disable agent event on every agent application registered with the session |
f20baf8e DG |
797 | * daemon. |
798 | * | |
799 | * Return LTTNG_OK on success or else a LTTNG_ERR* code. | |
800 | */ | |
fefd409b DG |
801 | int agent_disable_event(struct agent_event *event, |
802 | enum lttng_domain_type domain) | |
f20baf8e | 803 | { |
f1bc0129 | 804 | int ret = LTTNG_OK; |
022d91ba | 805 | struct agent_app *app; |
f20baf8e DG |
806 | struct lttng_ht_iter iter; |
807 | ||
a0377dfe | 808 | LTTNG_ASSERT(event); |
44760c20 JR |
809 | if (!AGENT_EVENT_IS_ENABLED(event)) { |
810 | goto end; | |
811 | } | |
812 | ||
813 | if (--event->enabled_count != 0) { | |
814 | /* | |
815 | * Agent event still enabled. Disable the agent event only when | |
816 | * all "users" have disabled it (event notifiers, event rules, | |
817 | * etc.). | |
818 | */ | |
819 | ret = LTTNG_OK; | |
f1bc0129 JG |
820 | goto end; |
821 | } | |
f20baf8e DG |
822 | |
823 | rcu_read_lock(); | |
824 | ||
412d7227 | 825 | cds_lfht_for_each_entry(the_agent_apps_ht_by_sock->ht, &iter.iter, app, |
f20baf8e | 826 | node.node) { |
fefd409b DG |
827 | if (app->domain != domain) { |
828 | continue; | |
829 | } | |
830 | ||
022d91ba | 831 | /* Enable event on agent application through TCP socket. */ |
f20baf8e DG |
832 | ret = disable_event(app, event); |
833 | if (ret != LTTNG_OK) { | |
834 | goto error; | |
835 | } | |
f20baf8e DG |
836 | } |
837 | ||
44760c20 | 838 | /* event->enabled_count is now 0. */ |
a0377dfe | 839 | LTTNG_ASSERT(!AGENT_EVENT_IS_ENABLED(event)); |
f20baf8e DG |
840 | |
841 | error: | |
842 | rcu_read_unlock(); | |
f1bc0129 | 843 | end: |
f20baf8e DG |
844 | return ret; |
845 | } | |
846 | ||
bdf64013 JG |
847 | /* |
848 | * Disable agent context on every agent application registered with the session | |
849 | * daemon. | |
850 | * | |
851 | * Return LTTNG_OK on success or else a LTTNG_ERR* code. | |
852 | */ | |
46440d0c SM |
853 | static int disable_context(struct agent_app_ctx *ctx, |
854 | enum lttng_domain_type domain) | |
bdf64013 JG |
855 | { |
856 | int ret = LTTNG_OK; | |
857 | struct agent_app *app; | |
858 | struct lttng_ht_iter iter; | |
859 | ||
a0377dfe | 860 | LTTNG_ASSERT(ctx); |
bdf64013 JG |
861 | |
862 | rcu_read_lock(); | |
863 | DBG2("Disabling agent application context %s:%s", | |
864 | ctx->provider_name, ctx->ctx_name); | |
412d7227 | 865 | cds_lfht_for_each_entry(the_agent_apps_ht_by_sock->ht, &iter.iter, app, |
bdf64013 JG |
866 | node.node) { |
867 | if (app->domain != domain) { | |
868 | continue; | |
869 | } | |
870 | ||
871 | ret = app_context_op(app, ctx, AGENT_CMD_APP_CTX_DISABLE); | |
872 | if (ret != LTTNG_OK) { | |
873 | goto end; | |
874 | } | |
875 | } | |
876 | end: | |
877 | rcu_read_unlock(); | |
878 | return ret; | |
879 | } | |
880 | ||
f20baf8e | 881 | /* |
022d91ba DG |
882 | * Ask every agent for the list of possible event. Events is allocated with the |
883 | * events of every agent application. | |
f20baf8e DG |
884 | * |
885 | * Return the number of events or else a negative value. | |
886 | */ | |
f60140a1 DG |
887 | int agent_list_events(struct lttng_event **events, |
888 | enum lttng_domain_type domain) | |
f20baf8e DG |
889 | { |
890 | int ret; | |
891 | size_t nbmem, count = 0; | |
022d91ba | 892 | struct agent_app *app; |
aae6255e | 893 | struct lttng_event *tmp_events = NULL; |
f20baf8e DG |
894 | struct lttng_ht_iter iter; |
895 | ||
a0377dfe | 896 | LTTNG_ASSERT(events); |
f20baf8e | 897 | |
0e115563 DG |
898 | DBG2("Agent listing events for domain %d", domain); |
899 | ||
f20baf8e | 900 | nbmem = UST_APP_EVENT_LIST_SIZE; |
7966af57 | 901 | tmp_events = (lttng_event *) zmalloc(nbmem * sizeof(*tmp_events)); |
f20baf8e | 902 | if (!tmp_events) { |
022d91ba | 903 | PERROR("zmalloc agent list events"); |
f20baf8e DG |
904 | ret = -ENOMEM; |
905 | goto error; | |
906 | } | |
907 | ||
908 | rcu_read_lock(); | |
412d7227 | 909 | cds_lfht_for_each_entry(the_agent_apps_ht_by_sock->ht, &iter.iter, app, |
f20baf8e DG |
910 | node.node) { |
911 | ssize_t nb_ev; | |
022d91ba | 912 | struct lttng_event *agent_events; |
f20baf8e | 913 | |
f60140a1 DG |
914 | /* Skip domain not asked by the list. */ |
915 | if (app->domain != domain) { | |
916 | continue; | |
917 | } | |
918 | ||
022d91ba | 919 | nb_ev = list_events(app, &agent_events); |
f20baf8e DG |
920 | if (nb_ev < 0) { |
921 | ret = nb_ev; | |
428de77a | 922 | goto error_unlock; |
f20baf8e DG |
923 | } |
924 | ||
53efb85a | 925 | if (count + nb_ev > nbmem) { |
f20baf8e | 926 | /* In case the realloc fails, we free the memory */ |
53efb85a MD |
927 | struct lttng_event *new_tmp_events; |
928 | size_t new_nbmem; | |
929 | ||
7966af57 | 930 | new_nbmem = std::max(count + nb_ev, nbmem << 1); |
022d91ba | 931 | DBG2("Reallocating agent event list from %zu to %zu entries", |
53efb85a | 932 | nbmem, new_nbmem); |
7966af57 | 933 | new_tmp_events = (lttng_event *) realloc(tmp_events, |
53efb85a MD |
934 | new_nbmem * sizeof(*new_tmp_events)); |
935 | if (!new_tmp_events) { | |
022d91ba | 936 | PERROR("realloc agent events"); |
f20baf8e | 937 | ret = -ENOMEM; |
022d91ba | 938 | free(agent_events); |
428de77a | 939 | goto error_unlock; |
f20baf8e | 940 | } |
53efb85a MD |
941 | /* Zero the new memory */ |
942 | memset(new_tmp_events + nbmem, 0, | |
943 | (new_nbmem - nbmem) * sizeof(*new_tmp_events)); | |
944 | nbmem = new_nbmem; | |
945 | tmp_events = new_tmp_events; | |
f20baf8e | 946 | } |
022d91ba | 947 | memcpy(tmp_events + count, agent_events, |
53efb85a | 948 | nb_ev * sizeof(*tmp_events)); |
022d91ba | 949 | free(agent_events); |
f20baf8e DG |
950 | count += nb_ev; |
951 | } | |
952 | rcu_read_unlock(); | |
953 | ||
954 | ret = count; | |
955 | *events = tmp_events; | |
aae6255e | 956 | return ret; |
f20baf8e | 957 | |
428de77a MD |
958 | error_unlock: |
959 | rcu_read_unlock(); | |
f20baf8e | 960 | error: |
aae6255e | 961 | free(tmp_events); |
f20baf8e DG |
962 | return ret; |
963 | } | |
964 | ||
965 | /* | |
022d91ba | 966 | * Create a agent app object using the given PID. |
f20baf8e DG |
967 | * |
968 | * Return newly allocated object or else NULL on error. | |
969 | */ | |
fefd409b DG |
970 | struct agent_app *agent_create_app(pid_t pid, enum lttng_domain_type domain, |
971 | struct lttcomm_sock *sock) | |
f20baf8e | 972 | { |
022d91ba | 973 | struct agent_app *app; |
f20baf8e | 974 | |
a0377dfe | 975 | LTTNG_ASSERT(sock); |
f20baf8e | 976 | |
7966af57 | 977 | app = (agent_app *) zmalloc(sizeof(*app)); |
f20baf8e | 978 | if (!app) { |
733c9165 | 979 | PERROR("Failed to allocate agent application instance"); |
f20baf8e DG |
980 | goto error; |
981 | } | |
982 | ||
983 | app->pid = pid; | |
fefd409b | 984 | app->domain = domain; |
f20baf8e | 985 | app->sock = sock; |
f20baf8e DG |
986 | lttng_ht_node_init_ulong(&app->node, (unsigned long) app->sock->fd); |
987 | ||
988 | error: | |
989 | return app; | |
990 | } | |
991 | ||
992 | /* | |
022d91ba | 993 | * Lookup agent app by socket in the global hash table. |
f20baf8e DG |
994 | * |
995 | * RCU read side lock MUST be acquired. | |
996 | * | |
997 | * Return object if found else NULL. | |
998 | */ | |
022d91ba | 999 | struct agent_app *agent_find_app_by_sock(int sock) |
f20baf8e DG |
1000 | { |
1001 | struct lttng_ht_node_ulong *node; | |
1002 | struct lttng_ht_iter iter; | |
022d91ba | 1003 | struct agent_app *app; |
f20baf8e | 1004 | |
a0377dfe | 1005 | LTTNG_ASSERT(sock >= 0); |
48b7cdc2 | 1006 | ASSERT_RCU_READ_LOCKED(); |
f20baf8e | 1007 | |
412d7227 SM |
1008 | lttng_ht_lookup(the_agent_apps_ht_by_sock, |
1009 | (void *) ((unsigned long) sock), &iter); | |
f20baf8e DG |
1010 | node = lttng_ht_iter_get_node_ulong(&iter); |
1011 | if (node == NULL) { | |
1012 | goto error; | |
1013 | } | |
022d91ba | 1014 | app = caa_container_of(node, struct agent_app, node); |
f20baf8e | 1015 | |
022d91ba | 1016 | DBG3("Agent app pid %d found by sock %d.", app->pid, sock); |
f20baf8e DG |
1017 | return app; |
1018 | ||
1019 | error: | |
022d91ba | 1020 | DBG3("Agent app NOT found by sock %d.", sock); |
f20baf8e DG |
1021 | return NULL; |
1022 | } | |
1023 | ||
1024 | /* | |
022d91ba | 1025 | * Add agent application object to the global hash table. |
f20baf8e | 1026 | */ |
022d91ba | 1027 | void agent_add_app(struct agent_app *app) |
f20baf8e | 1028 | { |
a0377dfe | 1029 | LTTNG_ASSERT(app); |
f20baf8e | 1030 | |
022d91ba | 1031 | DBG3("Agent adding app sock: %d and pid: %d to ht", app->sock->fd, app->pid); |
412d7227 | 1032 | lttng_ht_add_unique_ulong(the_agent_apps_ht_by_sock, &app->node); |
f20baf8e DG |
1033 | } |
1034 | ||
f20baf8e | 1035 | /* |
022d91ba | 1036 | * Delete agent application from the global hash table. |
d558f236 JG |
1037 | * |
1038 | * rcu_read_lock() must be held by the caller. | |
f20baf8e | 1039 | */ |
022d91ba | 1040 | void agent_delete_app(struct agent_app *app) |
f20baf8e DG |
1041 | { |
1042 | int ret; | |
1043 | struct lttng_ht_iter iter; | |
1044 | ||
a0377dfe | 1045 | LTTNG_ASSERT(app); |
48b7cdc2 | 1046 | ASSERT_RCU_READ_LOCKED(); |
f20baf8e | 1047 | |
022d91ba | 1048 | DBG3("Agent deleting app pid: %d and sock: %d", app->pid, app->sock->fd); |
f20baf8e DG |
1049 | |
1050 | iter.iter.node = &app->node.node; | |
412d7227 | 1051 | ret = lttng_ht_del(the_agent_apps_ht_by_sock, &iter); |
a0377dfe | 1052 | LTTNG_ASSERT(!ret); |
f20baf8e DG |
1053 | } |
1054 | ||
1055 | /* | |
e785906c | 1056 | * Destroy an agent application object by detaching it from its corresponding |
022d91ba | 1057 | * UST app if one is connected by closing the socket. Finally, perform a |
428de77a | 1058 | * delayed memory reclaim. |
f20baf8e | 1059 | */ |
022d91ba | 1060 | void agent_destroy_app(struct agent_app *app) |
f20baf8e | 1061 | { |
a0377dfe | 1062 | LTTNG_ASSERT(app); |
f20baf8e DG |
1063 | |
1064 | if (app->sock) { | |
1065 | app->sock->ops->close(app->sock); | |
1066 | lttcomm_destroy_sock(app->sock); | |
1067 | } | |
1068 | ||
022d91ba | 1069 | call_rcu(&app->node.head, destroy_app_agent_rcu); |
f20baf8e DG |
1070 | } |
1071 | ||
0475c50c | 1072 | /* |
022d91ba | 1073 | * Initialize an already allocated agent object. |
0475c50c DG |
1074 | * |
1075 | * Return 0 on success or else a negative errno value. | |
1076 | */ | |
022d91ba | 1077 | int agent_init(struct agent *agt) |
0475c50c DG |
1078 | { |
1079 | int ret; | |
1080 | ||
a0377dfe | 1081 | LTTNG_ASSERT(agt); |
0475c50c | 1082 | |
022d91ba DG |
1083 | agt->events = lttng_ht_new(0, LTTNG_HT_TYPE_STRING); |
1084 | if (!agt->events) { | |
0475c50c DG |
1085 | ret = -ENOMEM; |
1086 | goto error; | |
1087 | } | |
fefd409b | 1088 | lttng_ht_node_init_u64(&agt->node, agt->domain); |
0475c50c | 1089 | |
bdf64013 | 1090 | CDS_INIT_LIST_HEAD(&agt->app_ctx_list); |
0475c50c DG |
1091 | return 0; |
1092 | ||
1093 | error: | |
1094 | return ret; | |
1095 | } | |
1096 | ||
fefd409b DG |
1097 | /* |
1098 | * Add agent object to the given hash table. | |
1099 | */ | |
1100 | void agent_add(struct agent *agt, struct lttng_ht *ht) | |
1101 | { | |
a0377dfe FD |
1102 | LTTNG_ASSERT(agt); |
1103 | LTTNG_ASSERT(ht); | |
fefd409b DG |
1104 | |
1105 | DBG3("Agent adding from domain %d", agt->domain); | |
1106 | ||
fefd409b | 1107 | lttng_ht_add_unique_u64(ht, &agt->node); |
fefd409b DG |
1108 | } |
1109 | ||
1110 | /* | |
1111 | * Create an agent object for the given domain. | |
1112 | * | |
1113 | * Return the allocated agent or NULL on error. | |
1114 | */ | |
1115 | struct agent *agent_create(enum lttng_domain_type domain) | |
1116 | { | |
1117 | int ret; | |
1118 | struct agent *agt; | |
1119 | ||
7966af57 | 1120 | agt = (agent *) zmalloc(sizeof(struct agent)); |
fefd409b DG |
1121 | if (!agt) { |
1122 | goto error; | |
1123 | } | |
1124 | agt->domain = domain; | |
1125 | ||
1126 | ret = agent_init(agt); | |
1127 | if (ret < 0) { | |
1128 | free(agt); | |
988ae332 | 1129 | agt = NULL; |
fefd409b DG |
1130 | goto error; |
1131 | } | |
1132 | ||
1133 | error: | |
1134 | return agt; | |
1135 | } | |
1136 | ||
0475c50c | 1137 | /* |
51755dc8 JG |
1138 | * Create a newly allocated agent event data structure. |
1139 | * Ownership of filter_expression is taken. | |
0475c50c DG |
1140 | * |
1141 | * Return a new object else NULL on error. | |
1142 | */ | |
022d91ba | 1143 | struct agent_event *agent_create_event(const char *name, |
a9319624 | 1144 | enum lttng_loglevel_type loglevel_type, int loglevel_value, |
2b00d462 | 1145 | struct lttng_bytecode *filter, char *filter_expression) |
0475c50c | 1146 | { |
51755dc8 | 1147 | struct agent_event *event = NULL; |
0475c50c | 1148 | |
6b10b3b0 AM |
1149 | DBG3("Agent create new event with name %s, loglevel type %d, \ |
1150 | loglevel value %d and filter %s", | |
40111ba1 JG |
1151 | name, loglevel_type, loglevel_value, |
1152 | filter_expression ? filter_expression : "NULL"); | |
0475c50c | 1153 | |
51755dc8 JG |
1154 | if (!name) { |
1155 | ERR("Failed to create agent event; no name provided."); | |
0475c50c DG |
1156 | goto error; |
1157 | } | |
1158 | ||
7966af57 | 1159 | event = (agent_event *) zmalloc(sizeof(*event)); |
51755dc8 JG |
1160 | if (!event) { |
1161 | goto error; | |
0475c50c DG |
1162 | } |
1163 | ||
51755dc8 JG |
1164 | strncpy(event->name, name, sizeof(event->name)); |
1165 | event->name[sizeof(event->name) - 1] = '\0'; | |
1166 | lttng_ht_node_init_str(&event->node, event->name); | |
be6a6276 | 1167 | |
2106efa0 | 1168 | event->loglevel_value = loglevel_value; |
51755dc8 JG |
1169 | event->loglevel_type = loglevel_type; |
1170 | event->filter = filter; | |
1171 | event->filter_expression = filter_expression; | |
0475c50c DG |
1172 | error: |
1173 | return event; | |
1174 | } | |
1175 | ||
1176 | /* | |
022d91ba | 1177 | * Unique add of a agent event to an agent object. |
0475c50c | 1178 | */ |
022d91ba | 1179 | void agent_add_event(struct agent_event *event, struct agent *agt) |
0475c50c | 1180 | { |
a0377dfe FD |
1181 | LTTNG_ASSERT(event); |
1182 | LTTNG_ASSERT(agt); | |
1183 | LTTNG_ASSERT(agt->events); | |
0475c50c | 1184 | |
022d91ba | 1185 | DBG3("Agent adding event %s", event->name); |
022d91ba | 1186 | add_unique_agent_event(agt->events, event); |
022d91ba | 1187 | agt->being_used = 1; |
0475c50c DG |
1188 | } |
1189 | ||
bdf64013 JG |
1190 | /* |
1191 | * Unique add of a agent context to an agent object. | |
1192 | */ | |
df4f5a87 | 1193 | int agent_add_context(const struct lttng_event_context *ctx, struct agent *agt) |
bdf64013 JG |
1194 | { |
1195 | int ret = LTTNG_OK; | |
1196 | struct agent_app_ctx *agent_ctx = NULL; | |
1197 | ||
a0377dfe FD |
1198 | LTTNG_ASSERT(ctx); |
1199 | LTTNG_ASSERT(agt); | |
1200 | LTTNG_ASSERT(agt->events); | |
1201 | LTTNG_ASSERT(ctx->ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT); | |
bdf64013 JG |
1202 | |
1203 | agent_ctx = create_app_ctx(ctx); | |
1204 | if (!agent_ctx) { | |
1205 | ret = LTTNG_ERR_NOMEM; | |
1206 | goto end; | |
1207 | } | |
1208 | ||
1209 | DBG3("Agent adding context %s:%s", ctx->u.app_ctx.provider_name, | |
1210 | ctx->u.app_ctx.ctx_name); | |
1211 | cds_list_add_tail_rcu(&agent_ctx->list_node, &agt->app_ctx_list); | |
1212 | end: | |
1213 | return ret; | |
1214 | } | |
1215 | ||
0475c50c | 1216 | /* |
e261a6cc | 1217 | * Find multiple agent events sharing the given name. |
4a4ab2c3 | 1218 | * |
e261a6cc PP |
1219 | * RCU read side lock MUST be acquired. It must be held for the |
1220 | * duration of the iteration. | |
4a4ab2c3 | 1221 | * |
e261a6cc | 1222 | * Sets the given iterator. |
4a4ab2c3 | 1223 | */ |
e261a6cc PP |
1224 | void agent_find_events_by_name(const char *name, struct agent *agt, |
1225 | struct lttng_ht_iter* iter) | |
4a4ab2c3 | 1226 | { |
4a4ab2c3 | 1227 | struct lttng_ht *ht; |
022d91ba | 1228 | struct agent_ht_key key; |
4a4ab2c3 | 1229 | |
a0377dfe FD |
1230 | LTTNG_ASSERT(name); |
1231 | LTTNG_ASSERT(agt); | |
1232 | LTTNG_ASSERT(agt->events); | |
1233 | LTTNG_ASSERT(iter); | |
48b7cdc2 | 1234 | ASSERT_RCU_READ_LOCKED(); |
4a4ab2c3 | 1235 | |
022d91ba | 1236 | ht = agt->events; |
4a4ab2c3 DG |
1237 | key.name = name; |
1238 | ||
1239 | cds_lfht_lookup(ht->ht, ht->hash_fct((void *) name, lttng_ht_seed), | |
e261a6cc PP |
1240 | ht_match_event_by_name, &key, &iter->iter); |
1241 | } | |
4a4ab2c3 | 1242 | |
44760c20 JR |
1243 | /* |
1244 | * Find the agent event matching a trigger. | |
1245 | * | |
1246 | * RCU read side lock MUST be acquired. It must be held for as long as | |
1247 | * the returned agent_event is used. | |
1248 | * | |
1249 | * Return object if found else NULL. | |
1250 | */ | |
1251 | struct agent_event *agent_find_event_by_trigger( | |
1252 | const struct lttng_trigger *trigger, struct agent *agt) | |
1253 | { | |
1254 | enum lttng_condition_status c_status; | |
1255 | enum lttng_event_rule_status er_status; | |
1256 | enum lttng_domain_type domain; | |
1257 | const struct lttng_condition *condition; | |
1258 | const struct lttng_event_rule *rule; | |
1259 | const char *name; | |
1260 | const char *filter_expression; | |
85b05318 | 1261 | const struct lttng_log_level_rule *log_level_rule; |
44760c20 JR |
1262 | /* Unused when loglevel_type is 'ALL'. */ |
1263 | int loglevel_value = 0; | |
1264 | enum lttng_loglevel_type loglevel_type; | |
695f7044 JR |
1265 | event_rule_logging_get_name_pattern logging_get_name_pattern; |
1266 | event_rule_logging_get_log_level_rule logging_get_log_level_rule; | |
44760c20 | 1267 | |
a0377dfe FD |
1268 | LTTNG_ASSERT(agt); |
1269 | LTTNG_ASSERT(agt->events); | |
48b7cdc2 | 1270 | ASSERT_RCU_READ_LOCKED(); |
44760c20 JR |
1271 | |
1272 | condition = lttng_trigger_get_const_condition(trigger); | |
1273 | ||
a0377dfe | 1274 | LTTNG_ASSERT(lttng_condition_get_type(condition) == |
8dbb86b8 | 1275 | LTTNG_CONDITION_TYPE_EVENT_RULE_MATCHES); |
44760c20 | 1276 | |
8dbb86b8 JR |
1277 | c_status = lttng_condition_event_rule_matches_get_rule( |
1278 | condition, &rule); | |
a0377dfe | 1279 | LTTNG_ASSERT(c_status == LTTNG_CONDITION_STATUS_OK); |
44760c20 | 1280 | |
695f7044 JR |
1281 | switch (lttng_event_rule_get_type(rule)) { |
1282 | case LTTNG_EVENT_RULE_TYPE_JUL_LOGGING: | |
1283 | logging_get_name_pattern = | |
1284 | lttng_event_rule_jul_logging_get_name_pattern; | |
1285 | logging_get_log_level_rule = | |
1286 | lttng_event_rule_jul_logging_get_log_level_rule; | |
1287 | break; | |
1288 | case LTTNG_EVENT_RULE_TYPE_LOG4J_LOGGING: | |
1289 | logging_get_name_pattern = | |
1290 | lttng_event_rule_log4j_logging_get_name_pattern; | |
1291 | logging_get_log_level_rule = | |
1292 | lttng_event_rule_log4j_logging_get_log_level_rule; | |
1293 | break; | |
1294 | case LTTNG_EVENT_RULE_TYPE_PYTHON_LOGGING: | |
1295 | logging_get_name_pattern = | |
1296 | lttng_event_rule_python_logging_get_name_pattern; | |
1297 | logging_get_log_level_rule = | |
1298 | lttng_event_rule_python_logging_get_log_level_rule; | |
1299 | break; | |
1300 | default: | |
1301 | abort(); | |
1302 | break; | |
1303 | } | |
44760c20 JR |
1304 | |
1305 | domain = lttng_event_rule_get_domain_type(rule); | |
a0377dfe | 1306 | LTTNG_ASSERT(domain == LTTNG_DOMAIN_JUL || domain == LTTNG_DOMAIN_LOG4J || |
44760c20 JR |
1307 | domain == LTTNG_DOMAIN_PYTHON); |
1308 | ||
8bc73626 | 1309 | /* Get the event's pattern name ('name' in the legacy terminology). */ |
695f7044 | 1310 | er_status = logging_get_name_pattern(rule, &name); |
a0377dfe | 1311 | LTTNG_ASSERT(er_status == LTTNG_EVENT_RULE_STATUS_OK); |
44760c20 JR |
1312 | |
1313 | /* Get the internal filter expression. */ | |
1314 | filter_expression = lttng_event_rule_get_filter(rule); | |
1315 | ||
85b05318 | 1316 | /* Map log_level_rule to loglevel value. */ |
695f7044 | 1317 | er_status = logging_get_log_level_rule(rule, &log_level_rule); |
85b05318 JR |
1318 | if (er_status == LTTNG_EVENT_RULE_STATUS_UNSET) { |
1319 | loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL; | |
1320 | loglevel_value = 0; | |
1321 | } else if (er_status == LTTNG_EVENT_RULE_STATUS_OK) { | |
1322 | lttng_log_level_rule_to_loglevel(log_level_rule, &loglevel_type, &loglevel_value); | |
1323 | } else { | |
1324 | abort(); | |
44760c20 JR |
1325 | } |
1326 | ||
1327 | return agent_find_event(name, loglevel_type, loglevel_value, | |
1328 | filter_expression, agt); | |
1329 | } | |
1330 | ||
e261a6cc PP |
1331 | /* |
1332 | * Get the next agent event duplicate by name. This should be called | |
1333 | * after a call to agent_find_events_by_name() to iterate on events. | |
1334 | * | |
1335 | * The RCU read lock must be held during the iteration and for as long | |
1336 | * as the object the iterator points to remains in use. | |
1337 | */ | |
1338 | void agent_event_next_duplicate(const char *name, | |
1339 | struct agent *agt, struct lttng_ht_iter* iter) | |
1340 | { | |
1341 | struct agent_ht_key key; | |
4a4ab2c3 | 1342 | |
48b7cdc2 FD |
1343 | ASSERT_RCU_READ_LOCKED(); |
1344 | ||
e261a6cc PP |
1345 | key.name = name; |
1346 | ||
1347 | cds_lfht_next_duplicate(agt->events->ht, ht_match_event_by_name, | |
1348 | &key, &iter->iter); | |
4a4ab2c3 DG |
1349 | } |
1350 | ||
1351 | /* | |
6b10b3b0 | 1352 | * Find a agent event in the given agent using name, loglevel and filter. |
0475c50c | 1353 | * |
1e17eae2 JG |
1354 | * RCU read side lock MUST be acquired. It must be kept for as long as |
1355 | * the returned agent_event is used. | |
0475c50c DG |
1356 | * |
1357 | * Return object if found else NULL. | |
1358 | */ | |
a9319624 | 1359 | struct agent_event *agent_find_event(const char *name, |
44760c20 JR |
1360 | enum lttng_loglevel_type loglevel_type, |
1361 | int loglevel_value, | |
1362 | const char *filter_expression, | |
1363 | struct agent *agt) | |
0475c50c DG |
1364 | { |
1365 | struct lttng_ht_node_str *node; | |
1366 | struct lttng_ht_iter iter; | |
4a4ab2c3 | 1367 | struct lttng_ht *ht; |
022d91ba | 1368 | struct agent_ht_key key; |
0475c50c | 1369 | |
a0377dfe FD |
1370 | LTTNG_ASSERT(name); |
1371 | LTTNG_ASSERT(agt); | |
1372 | LTTNG_ASSERT(agt->events); | |
48b7cdc2 | 1373 | ASSERT_RCU_READ_LOCKED(); |
0475c50c | 1374 | |
022d91ba | 1375 | ht = agt->events; |
4a4ab2c3 | 1376 | key.name = name; |
2106efa0 | 1377 | key.loglevel_value = loglevel_value; |
a9319624 | 1378 | key.loglevel_type = loglevel_type; |
6b10b3b0 | 1379 | key.filter_expression = filter_expression; |
4a4ab2c3 DG |
1380 | |
1381 | cds_lfht_lookup(ht->ht, ht->hash_fct((void *) name, lttng_ht_seed), | |
1382 | ht_match_event, &key, &iter.iter); | |
0475c50c DG |
1383 | node = lttng_ht_iter_get_node_str(&iter); |
1384 | if (node == NULL) { | |
1385 | goto error; | |
1386 | } | |
1387 | ||
022d91ba DG |
1388 | DBG3("Agent event found %s.", name); |
1389 | return caa_container_of(node, struct agent_event, node); | |
0475c50c DG |
1390 | |
1391 | error: | |
a51e817b | 1392 | DBG3("Agent event NOT found %s.", name); |
0475c50c DG |
1393 | return NULL; |
1394 | } | |
1395 | ||
0475c50c | 1396 | /* |
022d91ba DG |
1397 | * Free given agent event. This event must not be globally visible at this |
1398 | * point (only expected to be used on failure just after event creation). After | |
1399 | * this call, the pointer is not usable anymore. | |
0475c50c | 1400 | */ |
022d91ba | 1401 | void agent_destroy_event(struct agent_event *event) |
0475c50c | 1402 | { |
a0377dfe | 1403 | LTTNG_ASSERT(event); |
0475c50c | 1404 | |
971da06a | 1405 | free(event->filter); |
8404118c | 1406 | free(event->filter_expression); |
51755dc8 | 1407 | free(event->exclusion); |
0475c50c DG |
1408 | free(event); |
1409 | } | |
1410 | ||
bdf64013 JG |
1411 | static |
1412 | void destroy_app_ctx_rcu(struct rcu_head *head) | |
1413 | { | |
1414 | struct agent_app_ctx *ctx = | |
1415 | caa_container_of(head, struct agent_app_ctx, rcu_node); | |
1416 | ||
1417 | destroy_app_ctx(ctx); | |
1418 | } | |
1419 | ||
0475c50c | 1420 | /* |
35ed21a5 | 1421 | * Destroy an agent completely. |
0475c50c | 1422 | */ |
022d91ba | 1423 | void agent_destroy(struct agent *agt) |
0475c50c DG |
1424 | { |
1425 | struct lttng_ht_node_str *node; | |
1426 | struct lttng_ht_iter iter; | |
bdf64013 | 1427 | struct agent_app_ctx *ctx; |
0475c50c | 1428 | |
a0377dfe | 1429 | LTTNG_ASSERT(agt); |
0475c50c | 1430 | |
022d91ba | 1431 | DBG3("Agent destroy"); |
0475c50c | 1432 | |
0475c50c | 1433 | rcu_read_lock(); |
022d91ba | 1434 | cds_lfht_for_each_entry(agt->events->ht, &iter.iter, node, node) { |
0475c50c | 1435 | int ret; |
022d91ba | 1436 | struct agent_event *event; |
29c0fd4d DG |
1437 | |
1438 | /* | |
bdf64013 JG |
1439 | * When destroying an event, we have to try to disable it on the |
1440 | * agent side so the event stops generating data. The return | |
1441 | * value is not important since we have to continue anyway | |
1442 | * destroying the object. | |
29c0fd4d | 1443 | */ |
022d91ba DG |
1444 | event = caa_container_of(node, struct agent_event, node); |
1445 | (void) agent_disable_event(event, agt->domain); | |
0475c50c | 1446 | |
022d91ba | 1447 | ret = lttng_ht_del(agt->events, &iter); |
a0377dfe | 1448 | LTTNG_ASSERT(!ret); |
022d91ba | 1449 | call_rcu(&node->head, destroy_event_agent_rcu); |
0475c50c | 1450 | } |
0475c50c | 1451 | |
bdf64013 JG |
1452 | cds_list_for_each_entry_rcu(ctx, &agt->app_ctx_list, list_node) { |
1453 | (void) disable_context(ctx, agt->domain); | |
1454 | cds_list_del(&ctx->list_node); | |
1455 | call_rcu(&ctx->rcu_node, destroy_app_ctx_rcu); | |
1456 | } | |
1457 | rcu_read_unlock(); | |
3c339053 | 1458 | lttng_ht_destroy(agt->events); |
35ed21a5 | 1459 | free(agt); |
f20baf8e DG |
1460 | } |
1461 | ||
1462 | /* | |
6a4e4039 | 1463 | * Allocate agent_apps_ht_by_sock. |
f20baf8e | 1464 | */ |
6a4e4039 | 1465 | int agent_app_ht_alloc(void) |
f20baf8e | 1466 | { |
412d7227 SM |
1467 | the_agent_apps_ht_by_sock = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
1468 | return the_agent_apps_ht_by_sock ? 0 : -1; | |
6a4e4039 JG |
1469 | } |
1470 | ||
1471 | /* | |
1472 | * Destroy a agent application by socket. | |
1473 | */ | |
1474 | void agent_destroy_app_by_sock(int sock) | |
1475 | { | |
1476 | struct agent_app *app; | |
1477 | ||
a0377dfe | 1478 | LTTNG_ASSERT(sock >= 0); |
6a4e4039 JG |
1479 | |
1480 | /* | |
1481 | * Not finding an application is a very important error that should NEVER | |
1482 | * happen. The hash table deletion is ONLY done through this call when the | |
1483 | * main sessiond thread is torn down. | |
1484 | */ | |
1485 | rcu_read_lock(); | |
1486 | app = agent_find_app_by_sock(sock); | |
a0377dfe | 1487 | LTTNG_ASSERT(app); |
6a4e4039 JG |
1488 | |
1489 | /* RCU read side lock is assumed to be held by this function. */ | |
1490 | agent_delete_app(app); | |
1491 | ||
1492 | /* The application is freed in a RCU call but the socket is closed here. */ | |
1493 | agent_destroy_app(app); | |
1494 | rcu_read_unlock(); | |
1495 | } | |
1496 | ||
1497 | /* | |
1498 | * Clean-up the agent app hash table and destroy it. | |
1499 | */ | |
1500 | void agent_app_ht_clean(void) | |
1501 | { | |
1502 | struct lttng_ht_node_ulong *node; | |
1503 | struct lttng_ht_iter iter; | |
1504 | ||
412d7227 | 1505 | if (!the_agent_apps_ht_by_sock) { |
a433283e JG |
1506 | return; |
1507 | } | |
6a4e4039 | 1508 | rcu_read_lock(); |
412d7227 SM |
1509 | cds_lfht_for_each_entry( |
1510 | the_agent_apps_ht_by_sock->ht, &iter.iter, node, node) { | |
6a4e4039 JG |
1511 | struct agent_app *app; |
1512 | ||
1513 | app = caa_container_of(node, struct agent_app, node); | |
1514 | agent_destroy_app_by_sock(app->sock->fd); | |
1515 | } | |
1516 | rcu_read_unlock(); | |
1517 | ||
412d7227 | 1518 | lttng_ht_destroy(the_agent_apps_ht_by_sock); |
f20baf8e DG |
1519 | } |
1520 | ||
1521 | /* | |
022d91ba | 1522 | * Update a agent application (given socket) using the given agent. |
f20baf8e DG |
1523 | * |
1524 | * Note that this function is most likely to be used with a tracing session | |
1525 | * thus the caller should make sure to hold the appropriate lock(s). | |
1526 | */ | |
733c9165 | 1527 | void agent_update(const struct agent *agt, const struct agent_app *app) |
f20baf8e DG |
1528 | { |
1529 | int ret; | |
022d91ba | 1530 | struct agent_event *event; |
f20baf8e | 1531 | struct lttng_ht_iter iter; |
bdf64013 | 1532 | struct agent_app_ctx *ctx; |
f20baf8e | 1533 | |
a0377dfe FD |
1534 | LTTNG_ASSERT(agt); |
1535 | LTTNG_ASSERT(app); | |
f20baf8e | 1536 | |
733c9165 | 1537 | DBG("Agent updating app: pid = %ld", (long) app->pid); |
f20baf8e DG |
1538 | |
1539 | rcu_read_lock(); | |
bdf64013 JG |
1540 | /* |
1541 | * We are in the registration path thus if the application is gone, | |
1542 | * there is a serious code flow error. | |
1543 | */ | |
733c9165 | 1544 | |
022d91ba | 1545 | cds_lfht_for_each_entry(agt->events->ht, &iter.iter, event, node.node) { |
f20baf8e | 1546 | /* Skip event if disabled. */ |
44760c20 | 1547 | if (!AGENT_EVENT_IS_ENABLED(event)) { |
f20baf8e DG |
1548 | continue; |
1549 | } | |
1550 | ||
f20baf8e DG |
1551 | ret = enable_event(app, event); |
1552 | if (ret != LTTNG_OK) { | |
022d91ba | 1553 | DBG2("Agent update unable to enable event %s on app pid: %d sock %d", |
f20baf8e DG |
1554 | event->name, app->pid, app->sock->fd); |
1555 | /* Let's try the others here and don't assume the app is dead. */ | |
1556 | continue; | |
1557 | } | |
1558 | } | |
bdf64013 JG |
1559 | |
1560 | cds_list_for_each_entry_rcu(ctx, &agt->app_ctx_list, list_node) { | |
1561 | ret = app_context_op(app, ctx, AGENT_CMD_APP_CTX_ENABLE); | |
1562 | if (ret != LTTNG_OK) { | |
1563 | DBG2("Agent update unable to add application context %s:%s on app pid: %d sock %d", | |
1564 | ctx->provider_name, ctx->ctx_name, | |
1565 | app->pid, app->sock->fd); | |
1566 | continue; | |
1567 | } | |
1568 | } | |
1569 | ||
f20baf8e | 1570 | rcu_read_unlock(); |
0475c50c | 1571 | } |
44760c20 JR |
1572 | |
1573 | /* | |
1574 | * Allocate the per-event notifier domain agent hash table. It is lazily | |
1575 | * populated as domains are used. | |
1576 | */ | |
1577 | int agent_by_event_notifier_domain_ht_create(void) | |
1578 | { | |
412d7227 SM |
1579 | the_trigger_agents_ht_by_domain = lttng_ht_new(0, LTTNG_HT_TYPE_U64); |
1580 | return the_trigger_agents_ht_by_domain ? 0 : -1; | |
44760c20 JR |
1581 | } |
1582 | ||
1583 | /* | |
1584 | * Clean-up the per-event notifier domain agent hash table and destroy it. | |
1585 | */ | |
1586 | void agent_by_event_notifier_domain_ht_destroy(void) | |
1587 | { | |
1588 | struct lttng_ht_node_u64 *node; | |
1589 | struct lttng_ht_iter iter; | |
1590 | ||
412d7227 | 1591 | if (!the_trigger_agents_ht_by_domain) { |
44760c20 JR |
1592 | return; |
1593 | } | |
1594 | ||
1595 | rcu_read_lock(); | |
412d7227 SM |
1596 | cds_lfht_for_each_entry(the_trigger_agents_ht_by_domain->ht, |
1597 | &iter.iter, node, node) { | |
44760c20 JR |
1598 | struct agent *agent = |
1599 | caa_container_of(node, struct agent, node); | |
1600 | const int ret = lttng_ht_del( | |
412d7227 | 1601 | the_trigger_agents_ht_by_domain, &iter); |
44760c20 | 1602 | |
a0377dfe | 1603 | LTTNG_ASSERT(ret == 0); |
44760c20 JR |
1604 | agent_destroy(agent); |
1605 | } | |
1606 | ||
1607 | rcu_read_unlock(); | |
412d7227 | 1608 | lttng_ht_destroy(the_trigger_agents_ht_by_domain); |
44760c20 JR |
1609 | } |
1610 | ||
1611 | struct agent *agent_find_by_event_notifier_domain( | |
1612 | enum lttng_domain_type domain_type) | |
1613 | { | |
1614 | struct agent *agt = NULL; | |
1615 | struct lttng_ht_node_u64 *node; | |
1616 | struct lttng_ht_iter iter; | |
1617 | const uint64_t key = (uint64_t) domain_type; | |
1618 | ||
a0377dfe | 1619 | LTTNG_ASSERT(the_trigger_agents_ht_by_domain); |
44760c20 JR |
1620 | |
1621 | DBG3("Per-event notifier domain agent lookup for domain '%s'", | |
1622 | lttng_domain_type_str(domain_type)); | |
1623 | ||
412d7227 | 1624 | lttng_ht_lookup(the_trigger_agents_ht_by_domain, &key, &iter); |
44760c20 JR |
1625 | node = lttng_ht_iter_get_node_u64(&iter); |
1626 | if (!node) { | |
1627 | goto end; | |
1628 | } | |
1629 | ||
1630 | agt = caa_container_of(node, struct agent, node); | |
1631 | ||
1632 | end: | |
1633 | return agt; | |
1634 | } |