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 |
28ab034a JG |
10 | #include "agent.hpp" |
11 | #include "common/error.hpp" | |
12 | #include "ust-app.hpp" | |
13 | #include "utils.hpp" | |
0475c50c | 14 | |
28ab034a JG |
15 | #include <common/common.hpp> |
16 | #include <common/compat/endian.hpp> | |
17 | #include <common/sessiond-comm/agent.hpp> | |
18 | ||
19 | #include <lttng/condition/condition.h> | |
20 | #include <lttng/condition/event-rule-matches.h> | |
21 | #include <lttng/domain-internal.hpp> | |
c9e313bc | 22 | #include <lttng/event-rule/event-rule-internal.hpp> |
28ab034a | 23 | #include <lttng/event-rule/event-rule.h> |
695f7044 JR |
24 | #include <lttng/event-rule/jul-logging.h> |
25 | #include <lttng/event-rule/log4j-logging.h> | |
26 | #include <lttng/event-rule/python-logging.h> | |
c9e313bc | 27 | #include <lttng/log-level-rule-internal.hpp> |
44760c20 | 28 | |
28ab034a JG |
29 | #include <urcu/rculist.h> |
30 | #include <urcu/uatomic.h> | |
23c2bd47 | 31 | |
e665dfbc JG |
32 | using event_rule_logging_get_name_pattern = |
33 | enum lttng_event_rule_status (*)(const struct lttng_event_rule *, const char **); | |
34 | using event_rule_logging_get_log_level_rule = enum lttng_event_rule_status (*)( | |
35 | const struct lttng_event_rule *, const struct lttng_log_level_rule **); | |
695f7044 | 36 | |
bdf64013 JG |
37 | /* |
38 | * Agent application context representation. | |
39 | */ | |
f1494934 | 40 | namespace { |
bdf64013 JG |
41 | struct agent_app_ctx { |
42 | char *provider_name; | |
43 | char *ctx_name; | |
44 | ||
45 | /* agent_app_ctx are part of the agent app_ctx_list. */ | |
46 | struct cds_list_head list_node; | |
47 | ||
48 | /* For call_rcu teardown. */ | |
49 | struct rcu_head rcu_node; | |
50 | }; | |
f1494934 | 51 | } /* namespace */ |
bdf64013 | 52 | |
23c2bd47 JG |
53 | /* |
54 | * Human readable agent return code. | |
55 | */ | |
28ab034a | 56 | static const char *lttcomm_agent_ret_code_str(lttcomm_agent_ret_code code) |
7966af57 SM |
57 | { |
58 | switch (code) { | |
59 | case AGENT_RET_CODE_SUCCESS: | |
60 | return "Success"; | |
61 | case AGENT_RET_CODE_INVALID: | |
62 | return "Invalid command"; | |
63 | case AGENT_RET_CODE_UNKNOWN_NAME: | |
64 | return "Unknown logger name"; | |
65 | default: | |
66 | return "Unknown code"; | |
67 | } | |
23c2bd47 JG |
68 | }; |
69 | ||
28ab034a | 70 | static void log_reply_code(uint32_t in_reply_ret_code) |
23c2bd47 JG |
71 | { |
72 | int level = PRINT_DBG3; | |
73 | /* | |
74 | * reply_ret_code and in_reply_ret_code are kept separate to have a | |
75 | * sanitized value (used to retrieve the human readable string) and the | |
76 | * original value which is logged as-is. | |
77 | */ | |
78 | uint32_t reply_ret_code = in_reply_ret_code; | |
79 | ||
28ab034a | 80 | if (reply_ret_code < AGENT_RET_CODE_SUCCESS || reply_ret_code >= AGENT_RET_CODE_NR) { |
23c2bd47 JG |
81 | reply_ret_code = AGENT_RET_CODE_NR; |
82 | level = PRINT_ERR; | |
83 | } | |
84 | ||
28ab034a JG |
85 | LOG(level, |
86 | "Agent replied with retcode: %s (%" PRIu32 ")", | |
87 | lttcomm_agent_ret_code_str((lttcomm_agent_ret_code) reply_ret_code), | |
88 | in_reply_ret_code); | |
23c2bd47 | 89 | } |
0475c50c | 90 | |
4a4ab2c3 DG |
91 | /* |
92 | * Match function for the events hash table lookup by name. | |
93 | */ | |
28ab034a | 94 | static int ht_match_event_by_name(struct cds_lfht_node *node, const void *_key) |
4a4ab2c3 | 95 | { |
022d91ba DG |
96 | struct agent_event *event; |
97 | const struct agent_ht_key *key; | |
4a4ab2c3 | 98 | |
a0377dfe FD |
99 | LTTNG_ASSERT(node); |
100 | LTTNG_ASSERT(_key); | |
4a4ab2c3 | 101 | |
022d91ba | 102 | event = caa_container_of(node, struct agent_event, node.node); |
7966af57 | 103 | key = (agent_ht_key *) _key; |
4a4ab2c3 DG |
104 | |
105 | /* Match 1 elements of the key: name. */ | |
106 | ||
107 | /* Event name */ | |
108 | if (strncmp(event->name, key->name, sizeof(event->name)) != 0) { | |
109 | goto no_match; | |
110 | } | |
111 | /* Match. */ | |
112 | return 1; | |
113 | ||
114 | no_match: | |
115 | return 0; | |
116 | } | |
117 | ||
118 | /* | |
44760c20 JR |
119 | * Match function for the events hash table lookup by name, log level and |
120 | * filter expression. | |
4a4ab2c3 | 121 | */ |
28ab034a | 122 | static int ht_match_event(struct cds_lfht_node *node, const void *_key) |
4a4ab2c3 | 123 | { |
022d91ba DG |
124 | struct agent_event *event; |
125 | const struct agent_ht_key *key; | |
19a97244 | 126 | int ll_match; |
4a4ab2c3 | 127 | |
a0377dfe FD |
128 | LTTNG_ASSERT(node); |
129 | LTTNG_ASSERT(_key); | |
4a4ab2c3 | 130 | |
022d91ba | 131 | event = caa_container_of(node, struct agent_event, node.node); |
7966af57 | 132 | key = (agent_ht_key *) _key; |
4a4ab2c3 DG |
133 | |
134 | /* Match 2 elements of the key: name and loglevel. */ | |
135 | ||
136 | /* Event name */ | |
137 | if (strncmp(event->name, key->name, sizeof(event->name)) != 0) { | |
138 | goto no_match; | |
139 | } | |
140 | ||
a9319624 | 141 | /* Event loglevel value and type. */ |
19a97244 | 142 | ll_match = loglevels_match(event->loglevel_type, |
28ab034a JG |
143 | event->loglevel_value, |
144 | key->loglevel_type, | |
145 | key->loglevel_value, | |
146 | LTTNG_EVENT_LOGLEVEL_ALL); | |
19a97244 PP |
147 | |
148 | if (!ll_match) { | |
4a4ab2c3 DG |
149 | goto no_match; |
150 | } | |
a9319624 | 151 | |
6b10b3b0 | 152 | /* Filter expression */ |
d42bc3c8 | 153 | if (!!event->filter_expression != !!key->filter_expression) { |
71e147d0 | 154 | /* One has a filter expression, the other does not */ |
6b10b3b0 AM |
155 | goto no_match; |
156 | } | |
157 | ||
71e147d0 | 158 | if (event->filter_expression) { |
28ab034a JG |
159 | if (strncmp(event->filter_expression, |
160 | key->filter_expression, | |
161 | strlen(event->filter_expression)) != 0) { | |
71e147d0 PP |
162 | goto no_match; |
163 | } | |
164 | } | |
165 | ||
4a4ab2c3 DG |
166 | return 1; |
167 | ||
168 | no_match: | |
169 | return 0; | |
170 | } | |
171 | ||
172 | /* | |
022d91ba | 173 | * Add unique agent event based on the event name and loglevel. |
4a4ab2c3 | 174 | */ |
28ab034a | 175 | static void add_unique_agent_event(struct lttng_ht *ht, struct agent_event *event) |
4a4ab2c3 DG |
176 | { |
177 | struct cds_lfht_node *node_ptr; | |
022d91ba | 178 | struct agent_ht_key key; |
4a4ab2c3 | 179 | |
a0377dfe FD |
180 | LTTNG_ASSERT(ht); |
181 | LTTNG_ASSERT(ht->ht); | |
182 | LTTNG_ASSERT(event); | |
4a4ab2c3 DG |
183 | |
184 | key.name = event->name; | |
2106efa0 | 185 | key.loglevel_value = event->loglevel_value; |
a9319624 | 186 | key.loglevel_type = event->loglevel_type; |
6b10b3b0 | 187 | key.filter_expression = event->filter_expression; |
4a4ab2c3 DG |
188 | |
189 | node_ptr = cds_lfht_add_unique(ht->ht, | |
28ab034a JG |
190 | ht->hash_fct(event->node.key, lttng_ht_seed), |
191 | ht_match_event, | |
192 | &key, | |
193 | &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 | 201 | { |
28ab034a JG |
202 | struct lttng_ht_node_str *node = lttng::utils::container_of(head, <tng_ht_node_str::head); |
203 | struct agent_event *event = lttng::utils::container_of(node, &agent_event::node); | |
0475c50c | 204 | |
992febc7 | 205 | agent_destroy_event(event); |
0475c50c DG |
206 | } |
207 | ||
f20baf8e | 208 | /* |
022d91ba | 209 | * URCU delayed agent app reclaim. |
f20baf8e | 210 | */ |
022d91ba | 211 | static void destroy_app_agent_rcu(struct rcu_head *head) |
f20baf8e DG |
212 | { |
213 | struct lttng_ht_node_ulong *node = | |
0114db0e | 214 | lttng::utils::container_of(head, <tng_ht_node_ulong::head); |
28ab034a | 215 | struct agent_app *app = lttng::utils::container_of(node, &agent_app::node); |
f20baf8e DG |
216 | |
217 | free(app); | |
218 | } | |
219 | ||
220 | /* | |
022d91ba DG |
221 | * Communication with the agent. Send the message header to the given socket in |
222 | * big endian. | |
f20baf8e DG |
223 | * |
224 | * Return 0 on success or else a negative errno message of sendmsg() op. | |
225 | */ | |
28ab034a JG |
226 | static int |
227 | send_header(struct lttcomm_sock *sock, uint64_t data_size, uint32_t cmd, uint32_t cmd_version) | |
f20baf8e DG |
228 | { |
229 | int ret; | |
230 | ssize_t size; | |
022d91ba | 231 | struct lttcomm_agent_hdr msg; |
f20baf8e | 232 | |
a0377dfe | 233 | LTTNG_ASSERT(sock); |
f20baf8e | 234 | |
53efb85a | 235 | memset(&msg, 0, sizeof(msg)); |
f20baf8e DG |
236 | msg.data_size = htobe64(data_size); |
237 | msg.cmd = htobe32(cmd); | |
238 | msg.cmd_version = htobe32(cmd_version); | |
239 | ||
240 | size = sock->ops->sendmsg(sock, &msg, sizeof(msg), 0); | |
241 | if (size < sizeof(msg)) { | |
242 | ret = -errno; | |
243 | goto error; | |
244 | } | |
245 | ret = 0; | |
246 | ||
247 | error: | |
248 | return ret; | |
249 | } | |
250 | ||
251 | /* | |
022d91ba DG |
252 | * Communication call with the agent. Send the payload to the given socket. The |
253 | * header MUST be sent prior to this call. | |
f20baf8e DG |
254 | * |
255 | * Return 0 on success or else a negative errno value of sendmsg() op. | |
256 | */ | |
28ab034a | 257 | static int send_payload(struct lttcomm_sock *sock, const void *data, size_t size) |
f20baf8e DG |
258 | { |
259 | int ret; | |
260 | ssize_t len; | |
261 | ||
a0377dfe FD |
262 | LTTNG_ASSERT(sock); |
263 | LTTNG_ASSERT(data); | |
f20baf8e DG |
264 | |
265 | len = sock->ops->sendmsg(sock, data, size, 0); | |
266 | if (len < size) { | |
267 | ret = -errno; | |
268 | goto error; | |
269 | } | |
270 | ret = 0; | |
271 | ||
272 | error: | |
273 | return ret; | |
274 | } | |
275 | ||
276 | /* | |
022d91ba DG |
277 | * Communication call with the agent. Receive reply from the agent using the |
278 | * given socket. | |
f20baf8e DG |
279 | * |
280 | * Return 0 on success or else a negative errno value from recvmsg() op. | |
281 | */ | |
282 | static int recv_reply(struct lttcomm_sock *sock, void *buf, size_t size) | |
283 | { | |
284 | int ret; | |
285 | ssize_t len; | |
286 | ||
a0377dfe FD |
287 | LTTNG_ASSERT(sock); |
288 | LTTNG_ASSERT(buf); | |
f20baf8e DG |
289 | |
290 | len = sock->ops->recvmsg(sock, buf, size, 0); | |
291 | if (len < size) { | |
292 | ret = -errno; | |
293 | goto error; | |
294 | } | |
295 | ret = 0; | |
296 | ||
297 | error: | |
298 | return ret; | |
299 | } | |
300 | ||
3c6a091f | 301 | /* |
428de77a | 302 | * Internal event listing for a given app. Populate events. |
3c6a091f DG |
303 | * |
304 | * Return number of element in the list or else a negative LTTNG_ERR* code. | |
428de77a MD |
305 | * On success, the caller is responsible for freeing the memory |
306 | * allocated for "events". | |
3c6a091f | 307 | */ |
022d91ba | 308 | static ssize_t list_events(struct agent_app *app, struct lttng_event **events) |
3c6a091f DG |
309 | { |
310 | int ret, i, len = 0, offset = 0; | |
311 | uint32_t nb_event; | |
312 | size_t data_size; | |
d84af1a4 | 313 | uint32_t reply_ret_code; |
cd9adb8b JG |
314 | struct lttng_event *tmp_events = nullptr; |
315 | struct lttcomm_agent_list_reply *reply = nullptr; | |
022d91ba | 316 | struct lttcomm_agent_list_reply_hdr reply_hdr; |
3c6a091f | 317 | |
a0377dfe FD |
318 | LTTNG_ASSERT(app); |
319 | LTTNG_ASSERT(app->sock); | |
320 | LTTNG_ASSERT(events); | |
3c6a091f | 321 | |
28ab034a | 322 | DBG2("Agent listing events for app pid: %d and socket %d", app->pid, app->sock->fd); |
3c6a091f | 323 | |
022d91ba | 324 | ret = send_header(app->sock, 0, AGENT_CMD_LIST, 0); |
3c6a091f DG |
325 | if (ret < 0) { |
326 | goto error_io; | |
327 | } | |
328 | ||
329 | /* Get list header so we know how much we'll receive. */ | |
330 | ret = recv_reply(app->sock, &reply_hdr, sizeof(reply_hdr)); | |
331 | if (ret < 0) { | |
332 | goto error_io; | |
333 | } | |
334 | ||
d84af1a4 JG |
335 | reply_ret_code = be32toh(reply_hdr.ret_code); |
336 | log_reply_code(reply_ret_code); | |
337 | switch (reply_ret_code) { | |
022d91ba | 338 | case AGENT_RET_CODE_SUCCESS: |
3c6a091f DG |
339 | data_size = be32toh(reply_hdr.data_size) + sizeof(*reply); |
340 | break; | |
341 | default: | |
3bd9aaeb | 342 | ret = LTTNG_ERR_UNK; |
3c6a091f DG |
343 | goto error; |
344 | } | |
345 | ||
64803277 | 346 | reply = zmalloc<lttcomm_agent_list_reply>(data_size); |
3c6a091f DG |
347 | if (!reply) { |
348 | ret = LTTNG_ERR_NOMEM; | |
349 | goto error; | |
350 | } | |
351 | ||
352 | /* Get the list with the appropriate data size. */ | |
353 | ret = recv_reply(app->sock, reply, data_size); | |
354 | if (ret < 0) { | |
355 | goto error_io; | |
356 | } | |
357 | ||
358 | nb_event = be32toh(reply->nb_event); | |
64803277 | 359 | tmp_events = calloc<lttng_event>(nb_event); |
3c6a091f DG |
360 | if (!tmp_events) { |
361 | ret = LTTNG_ERR_NOMEM; | |
362 | goto error; | |
363 | } | |
364 | ||
365 | for (i = 0; i < nb_event; i++) { | |
366 | offset += len; | |
28ab034a JG |
367 | if (lttng_strncpy(tmp_events[i].name, |
368 | reply->payload + offset, | |
369 | sizeof(tmp_events[i].name))) { | |
0a85e7a3 MD |
370 | ret = LTTNG_ERR_INVALID; |
371 | goto error; | |
372 | } | |
3c6a091f DG |
373 | tmp_events[i].pid = app->pid; |
374 | tmp_events[i].enabled = -1; | |
375 | len = strlen(reply->payload + offset) + 1; | |
376 | } | |
377 | ||
378 | *events = tmp_events; | |
379 | ||
380 | free(reply); | |
381 | return nb_event; | |
382 | ||
383 | error_io: | |
384 | ret = LTTNG_ERR_UST_LIST_FAIL; | |
385 | error: | |
386 | free(reply); | |
387 | free(tmp_events); | |
388 | return -ret; | |
3c6a091f DG |
389 | } |
390 | ||
f20baf8e | 391 | /* |
022d91ba DG |
392 | * Internal enable agent event on a agent application. This function |
393 | * communicates with the agent to enable a given event. | |
f20baf8e DG |
394 | * |
395 | * Return LTTNG_OK on success or else a LTTNG_ERR* code. | |
396 | */ | |
733c9165 | 397 | static int enable_event(const struct agent_app *app, struct agent_event *event) |
f20baf8e DG |
398 | { |
399 | int ret; | |
a0ba721c | 400 | char *bytes_to_send; |
f20baf8e | 401 | uint64_t data_size; |
a0ba721c | 402 | size_t filter_expression_length; |
f4f9d4db | 403 | uint32_t reply_ret_code; |
bdf64013 | 404 | struct lttcomm_agent_enable_event msg; |
022d91ba | 405 | struct lttcomm_agent_generic_reply reply; |
f20baf8e | 406 | |
a0377dfe FD |
407 | LTTNG_ASSERT(app); |
408 | LTTNG_ASSERT(app->sock); | |
409 | LTTNG_ASSERT(event); | |
f20baf8e | 410 | |
28ab034a JG |
411 | DBG2("Agent enabling event %s for app pid: %d and socket %d", |
412 | event->name, | |
413 | app->pid, | |
414 | app->sock->fd); | |
f20baf8e | 415 | |
a0ba721c AM |
416 | /* |
417 | * Calculate the payload's size, which is the fixed-size struct followed | |
418 | * by the variable-length filter expression (+1 for the ending \0). | |
419 | */ | |
420 | if (!event->filter_expression) { | |
421 | filter_expression_length = 0; | |
422 | } else { | |
423 | filter_expression_length = strlen(event->filter_expression) + 1; | |
424 | } | |
425 | data_size = sizeof(msg) + filter_expression_length; | |
f20baf8e | 426 | |
53efb85a | 427 | memset(&msg, 0, sizeof(msg)); |
a9bfd666 JG |
428 | msg.loglevel_value = htobe32(event->loglevel_value); |
429 | msg.loglevel_type = htobe32(event->loglevel_type); | |
bb45c03e MD |
430 | if (lttng_strncpy(msg.name, event->name, sizeof(msg.name))) { |
431 | ret = LTTNG_ERR_INVALID; | |
432 | goto error; | |
433 | } | |
a9bfd666 | 434 | msg.filter_expression_length = htobe32(filter_expression_length); |
a0ba721c | 435 | |
bb45c03e MD |
436 | ret = send_header(app->sock, data_size, AGENT_CMD_ENABLE, 0); |
437 | if (ret < 0) { | |
438 | goto error_io; | |
439 | } | |
440 | ||
64803277 | 441 | bytes_to_send = calloc<char>(data_size); |
a0ba721c AM |
442 | if (!bytes_to_send) { |
443 | ret = LTTNG_ERR_NOMEM; | |
444 | goto error; | |
445 | } | |
446 | ||
447 | memcpy(bytes_to_send, &msg, sizeof(msg)); | |
448 | if (filter_expression_length > 0) { | |
28ab034a JG |
449 | memcpy(bytes_to_send + sizeof(msg), |
450 | event->filter_expression, | |
451 | filter_expression_length); | |
a0ba721c AM |
452 | } |
453 | ||
454 | ret = send_payload(app->sock, bytes_to_send, data_size); | |
455 | free(bytes_to_send); | |
f20baf8e DG |
456 | if (ret < 0) { |
457 | goto error_io; | |
458 | } | |
459 | ||
460 | ret = recv_reply(app->sock, &reply, sizeof(reply)); | |
461 | if (ret < 0) { | |
462 | goto error_io; | |
463 | } | |
464 | ||
f4f9d4db JG |
465 | reply_ret_code = be32toh(reply.ret_code); |
466 | log_reply_code(reply_ret_code); | |
467 | switch (reply_ret_code) { | |
022d91ba | 468 | case AGENT_RET_CODE_SUCCESS: |
f20baf8e | 469 | break; |
022d91ba | 470 | case AGENT_RET_CODE_UNKNOWN_NAME: |
f20baf8e DG |
471 | ret = LTTNG_ERR_UST_EVENT_NOT_FOUND; |
472 | goto error; | |
473 | default: | |
3bd9aaeb | 474 | ret = LTTNG_ERR_UNK; |
f20baf8e DG |
475 | goto error; |
476 | } | |
477 | ||
478 | return LTTNG_OK; | |
479 | ||
480 | error_io: | |
481 | ret = LTTNG_ERR_UST_ENABLE_FAIL; | |
482 | error: | |
483 | return ret; | |
484 | } | |
485 | ||
bdf64013 JG |
486 | /* |
487 | * Send Pascal-style string. Size is sent as a 32-bit big endian integer. | |
488 | */ | |
28ab034a | 489 | static int send_pstring(struct lttcomm_sock *sock, const char *str, uint32_t len) |
bdf64013 JG |
490 | { |
491 | int ret; | |
492 | uint32_t len_be; | |
493 | ||
494 | len_be = htobe32(len); | |
495 | ret = send_payload(sock, &len_be, sizeof(len_be)); | |
496 | if (ret) { | |
497 | goto end; | |
498 | } | |
499 | ||
500 | ret = send_payload(sock, str, len); | |
501 | if (ret) { | |
502 | goto end; | |
503 | } | |
504 | end: | |
505 | return ret; | |
506 | } | |
507 | ||
508 | /* | |
509 | * Internal enable application context on an agent application. This function | |
510 | * communicates with the agent to enable a given application context. | |
511 | * | |
512 | * Return LTTNG_OK on success or else a LTTNG_ERR* code. | |
513 | */ | |
733c9165 | 514 | static int app_context_op(const struct agent_app *app, |
28ab034a JG |
515 | const struct agent_app_ctx *ctx, |
516 | enum lttcomm_agent_command cmd) | |
bdf64013 JG |
517 | { |
518 | int ret; | |
519 | uint32_t reply_ret_code; | |
520 | struct lttcomm_agent_generic_reply reply; | |
521 | size_t app_ctx_provider_name_len, app_ctx_name_len, data_size; | |
522 | ||
a0377dfe FD |
523 | LTTNG_ASSERT(app); |
524 | LTTNG_ASSERT(app->sock); | |
525 | LTTNG_ASSERT(ctx); | |
28ab034a | 526 | LTTNG_ASSERT(cmd == AGENT_CMD_APP_CTX_ENABLE || cmd == AGENT_CMD_APP_CTX_DISABLE); |
bdf64013 JG |
527 | |
528 | DBG2("Agent %s application %s:%s for app pid: %d and socket %d", | |
28ab034a JG |
529 | cmd == AGENT_CMD_APP_CTX_ENABLE ? "enabling" : "disabling", |
530 | ctx->provider_name, | |
531 | ctx->ctx_name, | |
532 | app->pid, | |
533 | app->sock->fd); | |
bdf64013 JG |
534 | |
535 | /* | |
536 | * Calculate the payload's size, which consists of the size (u32, BE) | |
537 | * of the provider name, the NULL-terminated provider name string, the | |
538 | * size (u32, BE) of the context name, followed by the NULL-terminated | |
539 | * context name string. | |
540 | */ | |
541 | app_ctx_provider_name_len = strlen(ctx->provider_name) + 1; | |
542 | app_ctx_name_len = strlen(ctx->ctx_name) + 1; | |
28ab034a JG |
543 | data_size = |
544 | sizeof(uint32_t) + app_ctx_provider_name_len + sizeof(uint32_t) + app_ctx_name_len; | |
bdf64013 JG |
545 | |
546 | ret = send_header(app->sock, data_size, cmd, 0); | |
547 | if (ret < 0) { | |
548 | goto error_io; | |
549 | } | |
550 | ||
28ab034a | 551 | if (app_ctx_provider_name_len > UINT32_MAX || app_ctx_name_len > UINT32_MAX) { |
bdf64013 JG |
552 | ERR("Application context name > MAX_UINT32"); |
553 | ret = LTTNG_ERR_INVALID; | |
554 | goto error; | |
555 | } | |
556 | ||
28ab034a | 557 | ret = send_pstring(app->sock, ctx->provider_name, (uint32_t) app_ctx_provider_name_len); |
bdf64013 JG |
558 | if (ret < 0) { |
559 | goto error_io; | |
560 | } | |
561 | ||
28ab034a | 562 | ret = send_pstring(app->sock, ctx->ctx_name, (uint32_t) app_ctx_name_len); |
bdf64013 JG |
563 | if (ret < 0) { |
564 | goto error_io; | |
565 | } | |
566 | ||
567 | ret = recv_reply(app->sock, &reply, sizeof(reply)); | |
568 | if (ret < 0) { | |
569 | goto error_io; | |
570 | } | |
571 | ||
572 | reply_ret_code = be32toh(reply.ret_code); | |
573 | log_reply_code(reply_ret_code); | |
574 | switch (reply_ret_code) { | |
575 | case AGENT_RET_CODE_SUCCESS: | |
576 | break; | |
577 | default: | |
578 | ret = LTTNG_ERR_UNK; | |
579 | goto error; | |
580 | } | |
581 | ||
582 | return LTTNG_OK; | |
583 | ||
584 | error_io: | |
585 | ret = LTTNG_ERR_UST_ENABLE_FAIL; | |
586 | error: | |
587 | return ret; | |
588 | } | |
589 | ||
f20baf8e | 590 | /* |
022d91ba DG |
591 | * Internal disable agent event call on a agent application. This function |
592 | * communicates with the agent to disable a given event. | |
f20baf8e DG |
593 | * |
594 | * Return LTTNG_OK on success or else a LTTNG_ERR* code. | |
595 | */ | |
022d91ba | 596 | static int disable_event(struct agent_app *app, struct agent_event *event) |
f20baf8e DG |
597 | { |
598 | int ret; | |
599 | uint64_t data_size; | |
517992f8 | 600 | uint32_t reply_ret_code; |
bdf64013 | 601 | struct lttcomm_agent_disable_event msg; |
022d91ba | 602 | struct lttcomm_agent_generic_reply reply; |
f20baf8e | 603 | |
a0377dfe FD |
604 | LTTNG_ASSERT(app); |
605 | LTTNG_ASSERT(app->sock); | |
606 | LTTNG_ASSERT(event); | |
f20baf8e | 607 | |
28ab034a JG |
608 | DBG2("Agent disabling event %s for app pid: %d and socket %d", |
609 | event->name, | |
610 | app->pid, | |
611 | app->sock->fd); | |
f20baf8e DG |
612 | |
613 | data_size = sizeof(msg); | |
63be730a MD |
614 | memset(&msg, 0, sizeof(msg)); |
615 | if (lttng_strncpy(msg.name, event->name, sizeof(msg.name))) { | |
616 | ret = LTTNG_ERR_INVALID; | |
617 | goto error; | |
618 | } | |
f20baf8e | 619 | |
022d91ba | 620 | ret = send_header(app->sock, data_size, AGENT_CMD_DISABLE, 0); |
f20baf8e DG |
621 | if (ret < 0) { |
622 | goto error_io; | |
623 | } | |
624 | ||
f20baf8e DG |
625 | ret = send_payload(app->sock, &msg, sizeof(msg)); |
626 | if (ret < 0) { | |
627 | goto error_io; | |
628 | } | |
629 | ||
630 | ret = recv_reply(app->sock, &reply, sizeof(reply)); | |
631 | if (ret < 0) { | |
632 | goto error_io; | |
633 | } | |
634 | ||
517992f8 JG |
635 | reply_ret_code = be32toh(reply.ret_code); |
636 | log_reply_code(reply_ret_code); | |
637 | switch (reply_ret_code) { | |
022d91ba DG |
638 | case AGENT_RET_CODE_SUCCESS: |
639 | break; | |
640 | case AGENT_RET_CODE_UNKNOWN_NAME: | |
641 | ret = LTTNG_ERR_UST_EVENT_NOT_FOUND; | |
642 | goto error; | |
643 | default: | |
3bd9aaeb | 644 | ret = LTTNG_ERR_UNK; |
022d91ba | 645 | goto error; |
f20baf8e DG |
646 | } |
647 | ||
648 | return LTTNG_OK; | |
649 | ||
650 | error_io: | |
651 | ret = LTTNG_ERR_UST_DISABLE_FAIL; | |
652 | error: | |
653 | return ret; | |
654 | } | |
655 | ||
1b500e7a | 656 | /* |
022d91ba | 657 | * Send back the registration DONE command to a given agent application. |
1b500e7a DG |
658 | * |
659 | * Return 0 on success or else a negative value. | |
660 | */ | |
022d91ba | 661 | int agent_send_registration_done(struct agent_app *app) |
1b500e7a | 662 | { |
a0377dfe FD |
663 | LTTNG_ASSERT(app); |
664 | LTTNG_ASSERT(app->sock); | |
1b500e7a | 665 | |
022d91ba | 666 | DBG("Agent sending registration done to app socket %d", app->sock->fd); |
1b500e7a | 667 | |
b26d1f5c | 668 | return send_header(app->sock, 0, AGENT_CMD_REG_DONE, 0); |
1b500e7a DG |
669 | } |
670 | ||
f20baf8e | 671 | /* |
022d91ba | 672 | * Enable agent event on every agent applications registered with the session |
f20baf8e DG |
673 | * daemon. |
674 | * | |
675 | * Return LTTNG_OK on success or else a LTTNG_ERR* code. | |
676 | */ | |
28ab034a | 677 | int agent_enable_event(struct agent_event *event, enum lttng_domain_type domain) |
f20baf8e DG |
678 | { |
679 | int ret; | |
022d91ba | 680 | struct agent_app *app; |
f20baf8e DG |
681 | struct lttng_ht_iter iter; |
682 | ||
a0377dfe | 683 | LTTNG_ASSERT(event); |
f20baf8e DG |
684 | |
685 | rcu_read_lock(); | |
686 | ||
28ab034a | 687 | cds_lfht_for_each_entry (the_agent_apps_ht_by_sock->ht, &iter.iter, app, node.node) { |
fefd409b DG |
688 | if (app->domain != domain) { |
689 | continue; | |
690 | } | |
691 | ||
022d91ba | 692 | /* Enable event on agent application through TCP socket. */ |
f20baf8e DG |
693 | ret = enable_event(app, event); |
694 | if (ret != LTTNG_OK) { | |
695 | goto error; | |
696 | } | |
f20baf8e DG |
697 | } |
698 | ||
44760c20 | 699 | event->enabled_count++; |
f20baf8e DG |
700 | ret = LTTNG_OK; |
701 | ||
702 | error: | |
703 | rcu_read_unlock(); | |
704 | return ret; | |
705 | } | |
706 | ||
28ab034a | 707 | static void destroy_app_ctx(struct agent_app_ctx *ctx) |
bdf64013 JG |
708 | { |
709 | free(ctx->provider_name); | |
710 | free(ctx->ctx_name); | |
711 | free(ctx); | |
712 | } | |
713 | ||
28ab034a | 714 | static struct agent_app_ctx *create_app_ctx(const struct lttng_event_context *ctx) |
bdf64013 | 715 | { |
cd9adb8b | 716 | struct agent_app_ctx *agent_ctx = nullptr; |
bdf64013 JG |
717 | |
718 | if (!ctx) { | |
719 | goto end; | |
720 | } | |
721 | ||
a0377dfe | 722 | LTTNG_ASSERT(ctx->ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT); |
64803277 | 723 | agent_ctx = zmalloc<agent_app_ctx>(); |
bdf64013 JG |
724 | if (!agent_ctx) { |
725 | goto end; | |
726 | } | |
727 | ||
728 | agent_ctx->provider_name = strdup(ctx->u.app_ctx.provider_name); | |
729 | agent_ctx->ctx_name = strdup(ctx->u.app_ctx.ctx_name); | |
730 | if (!agent_ctx->provider_name || !agent_ctx->ctx_name) { | |
731 | destroy_app_ctx(agent_ctx); | |
cd9adb8b | 732 | agent_ctx = nullptr; |
bdf64013 JG |
733 | } |
734 | end: | |
735 | return agent_ctx; | |
736 | } | |
737 | ||
738 | /* | |
739 | * Enable agent context on every agent applications registered with the session | |
740 | * daemon. | |
741 | * | |
742 | * Return LTTNG_OK on success or else a LTTNG_ERR* code. | |
743 | */ | |
28ab034a | 744 | int agent_enable_context(const struct lttng_event_context *ctx, enum lttng_domain_type domain) |
bdf64013 JG |
745 | { |
746 | int ret; | |
747 | struct agent_app *app; | |
748 | struct lttng_ht_iter iter; | |
749 | ||
a0377dfe | 750 | LTTNG_ASSERT(ctx); |
bdf64013 JG |
751 | if (ctx->ctx != LTTNG_EVENT_CONTEXT_APP_CONTEXT) { |
752 | ret = LTTNG_ERR_INVALID; | |
753 | goto error; | |
754 | } | |
755 | ||
756 | rcu_read_lock(); | |
757 | ||
28ab034a | 758 | cds_lfht_for_each_entry (the_agent_apps_ht_by_sock->ht, &iter.iter, app, node.node) { |
bdf64013 JG |
759 | struct agent_app_ctx *agent_ctx; |
760 | ||
761 | if (app->domain != domain) { | |
762 | continue; | |
763 | } | |
764 | ||
765 | agent_ctx = create_app_ctx(ctx); | |
766 | if (!agent_ctx) { | |
a33c2651 | 767 | ret = LTTNG_ERR_NOMEM; |
bdf64013 JG |
768 | goto error_unlock; |
769 | } | |
770 | ||
771 | /* Enable event on agent application through TCP socket. */ | |
772 | ret = app_context_op(app, agent_ctx, AGENT_CMD_APP_CTX_ENABLE); | |
c12618b5 | 773 | destroy_app_ctx(agent_ctx); |
bdf64013 | 774 | if (ret != LTTNG_OK) { |
bdf64013 JG |
775 | goto error_unlock; |
776 | } | |
777 | } | |
778 | ||
779 | ret = LTTNG_OK; | |
780 | ||
781 | error_unlock: | |
782 | rcu_read_unlock(); | |
783 | error: | |
784 | return ret; | |
785 | } | |
786 | ||
f20baf8e | 787 | /* |
bdf64013 | 788 | * Disable agent event on every agent application registered with the session |
f20baf8e DG |
789 | * daemon. |
790 | * | |
791 | * Return LTTNG_OK on success or else a LTTNG_ERR* code. | |
792 | */ | |
28ab034a | 793 | int agent_disable_event(struct agent_event *event, enum lttng_domain_type domain) |
f20baf8e | 794 | { |
f1bc0129 | 795 | int ret = LTTNG_OK; |
022d91ba | 796 | struct agent_app *app; |
f20baf8e DG |
797 | struct lttng_ht_iter iter; |
798 | ||
a0377dfe | 799 | LTTNG_ASSERT(event); |
44760c20 JR |
800 | if (!AGENT_EVENT_IS_ENABLED(event)) { |
801 | goto end; | |
802 | } | |
803 | ||
804 | if (--event->enabled_count != 0) { | |
805 | /* | |
806 | * Agent event still enabled. Disable the agent event only when | |
807 | * all "users" have disabled it (event notifiers, event rules, | |
808 | * etc.). | |
809 | */ | |
810 | ret = LTTNG_OK; | |
f1bc0129 JG |
811 | goto end; |
812 | } | |
f20baf8e DG |
813 | |
814 | rcu_read_lock(); | |
815 | ||
28ab034a | 816 | cds_lfht_for_each_entry (the_agent_apps_ht_by_sock->ht, &iter.iter, app, node.node) { |
fefd409b DG |
817 | if (app->domain != domain) { |
818 | continue; | |
819 | } | |
820 | ||
022d91ba | 821 | /* Enable event on agent application through TCP socket. */ |
f20baf8e DG |
822 | ret = disable_event(app, event); |
823 | if (ret != LTTNG_OK) { | |
824 | goto error; | |
825 | } | |
f20baf8e DG |
826 | } |
827 | ||
44760c20 | 828 | /* event->enabled_count is now 0. */ |
a0377dfe | 829 | LTTNG_ASSERT(!AGENT_EVENT_IS_ENABLED(event)); |
f20baf8e DG |
830 | |
831 | error: | |
832 | rcu_read_unlock(); | |
f1bc0129 | 833 | end: |
f20baf8e DG |
834 | return ret; |
835 | } | |
836 | ||
bdf64013 JG |
837 | /* |
838 | * Disable agent context on every agent application registered with the session | |
839 | * daemon. | |
840 | * | |
841 | * Return LTTNG_OK on success or else a LTTNG_ERR* code. | |
842 | */ | |
28ab034a | 843 | static int disable_context(struct agent_app_ctx *ctx, enum lttng_domain_type domain) |
bdf64013 JG |
844 | { |
845 | int ret = LTTNG_OK; | |
846 | struct agent_app *app; | |
847 | struct lttng_ht_iter iter; | |
848 | ||
a0377dfe | 849 | LTTNG_ASSERT(ctx); |
bdf64013 JG |
850 | |
851 | rcu_read_lock(); | |
28ab034a JG |
852 | DBG2("Disabling agent application context %s:%s", ctx->provider_name, ctx->ctx_name); |
853 | cds_lfht_for_each_entry (the_agent_apps_ht_by_sock->ht, &iter.iter, app, node.node) { | |
bdf64013 JG |
854 | if (app->domain != domain) { |
855 | continue; | |
856 | } | |
857 | ||
858 | ret = app_context_op(app, ctx, AGENT_CMD_APP_CTX_DISABLE); | |
859 | if (ret != LTTNG_OK) { | |
860 | goto end; | |
861 | } | |
862 | } | |
863 | end: | |
864 | rcu_read_unlock(); | |
865 | return ret; | |
866 | } | |
867 | ||
f20baf8e | 868 | /* |
022d91ba DG |
869 | * Ask every agent for the list of possible event. Events is allocated with the |
870 | * events of every agent application. | |
f20baf8e DG |
871 | * |
872 | * Return the number of events or else a negative value. | |
873 | */ | |
28ab034a | 874 | int agent_list_events(struct lttng_event **events, enum lttng_domain_type domain) |
f20baf8e DG |
875 | { |
876 | int ret; | |
877 | size_t nbmem, count = 0; | |
022d91ba | 878 | struct agent_app *app; |
cd9adb8b | 879 | struct lttng_event *tmp_events = nullptr; |
f20baf8e DG |
880 | struct lttng_ht_iter iter; |
881 | ||
a0377dfe | 882 | LTTNG_ASSERT(events); |
f20baf8e | 883 | |
0e115563 DG |
884 | DBG2("Agent listing events for domain %d", domain); |
885 | ||
f20baf8e | 886 | nbmem = UST_APP_EVENT_LIST_SIZE; |
64803277 | 887 | tmp_events = calloc<lttng_event>(nbmem); |
f20baf8e | 888 | if (!tmp_events) { |
022d91ba | 889 | PERROR("zmalloc agent list events"); |
f20baf8e DG |
890 | ret = -ENOMEM; |
891 | goto error; | |
892 | } | |
893 | ||
894 | rcu_read_lock(); | |
28ab034a | 895 | cds_lfht_for_each_entry (the_agent_apps_ht_by_sock->ht, &iter.iter, app, node.node) { |
f20baf8e | 896 | ssize_t nb_ev; |
022d91ba | 897 | struct lttng_event *agent_events; |
f20baf8e | 898 | |
f60140a1 DG |
899 | /* Skip domain not asked by the list. */ |
900 | if (app->domain != domain) { | |
901 | continue; | |
902 | } | |
903 | ||
022d91ba | 904 | nb_ev = list_events(app, &agent_events); |
f20baf8e DG |
905 | if (nb_ev < 0) { |
906 | ret = nb_ev; | |
428de77a | 907 | goto error_unlock; |
f20baf8e DG |
908 | } |
909 | ||
53efb85a | 910 | if (count + nb_ev > nbmem) { |
f20baf8e | 911 | /* In case the realloc fails, we free the memory */ |
53efb85a MD |
912 | struct lttng_event *new_tmp_events; |
913 | size_t new_nbmem; | |
914 | ||
7966af57 | 915 | new_nbmem = std::max(count + nb_ev, nbmem << 1); |
022d91ba | 916 | DBG2("Reallocating agent event list from %zu to %zu entries", |
28ab034a JG |
917 | nbmem, |
918 | new_nbmem); | |
919 | new_tmp_events = (lttng_event *) realloc( | |
920 | tmp_events, new_nbmem * sizeof(*new_tmp_events)); | |
53efb85a | 921 | if (!new_tmp_events) { |
022d91ba | 922 | PERROR("realloc agent events"); |
f20baf8e | 923 | ret = -ENOMEM; |
022d91ba | 924 | free(agent_events); |
428de77a | 925 | goto error_unlock; |
f20baf8e | 926 | } |
53efb85a | 927 | /* Zero the new memory */ |
28ab034a JG |
928 | memset(new_tmp_events + nbmem, |
929 | 0, | |
930 | (new_nbmem - nbmem) * sizeof(*new_tmp_events)); | |
53efb85a MD |
931 | nbmem = new_nbmem; |
932 | tmp_events = new_tmp_events; | |
f20baf8e | 933 | } |
28ab034a | 934 | memcpy(tmp_events + count, agent_events, nb_ev * sizeof(*tmp_events)); |
022d91ba | 935 | free(agent_events); |
f20baf8e DG |
936 | count += nb_ev; |
937 | } | |
938 | rcu_read_unlock(); | |
939 | ||
940 | ret = count; | |
941 | *events = tmp_events; | |
aae6255e | 942 | return ret; |
f20baf8e | 943 | |
428de77a MD |
944 | error_unlock: |
945 | rcu_read_unlock(); | |
f20baf8e | 946 | error: |
aae6255e | 947 | free(tmp_events); |
f20baf8e DG |
948 | return ret; |
949 | } | |
950 | ||
951 | /* | |
022d91ba | 952 | * Create a agent app object using the given PID. |
f20baf8e DG |
953 | * |
954 | * Return newly allocated object or else NULL on error. | |
955 | */ | |
28ab034a JG |
956 | struct agent_app * |
957 | agent_create_app(pid_t pid, enum lttng_domain_type domain, struct lttcomm_sock *sock) | |
f20baf8e | 958 | { |
022d91ba | 959 | struct agent_app *app; |
f20baf8e | 960 | |
a0377dfe | 961 | LTTNG_ASSERT(sock); |
f20baf8e | 962 | |
64803277 | 963 | app = zmalloc<agent_app>(); |
f20baf8e | 964 | if (!app) { |
733c9165 | 965 | PERROR("Failed to allocate agent application instance"); |
f20baf8e DG |
966 | goto error; |
967 | } | |
968 | ||
969 | app->pid = pid; | |
fefd409b | 970 | app->domain = domain; |
f20baf8e | 971 | app->sock = sock; |
f20baf8e DG |
972 | lttng_ht_node_init_ulong(&app->node, (unsigned long) app->sock->fd); |
973 | ||
974 | error: | |
975 | return app; | |
976 | } | |
977 | ||
978 | /* | |
022d91ba | 979 | * Lookup agent app by socket in the global hash table. |
f20baf8e DG |
980 | * |
981 | * RCU read side lock MUST be acquired. | |
982 | * | |
983 | * Return object if found else NULL. | |
984 | */ | |
022d91ba | 985 | struct agent_app *agent_find_app_by_sock(int sock) |
f20baf8e DG |
986 | { |
987 | struct lttng_ht_node_ulong *node; | |
988 | struct lttng_ht_iter iter; | |
022d91ba | 989 | struct agent_app *app; |
f20baf8e | 990 | |
a0377dfe | 991 | LTTNG_ASSERT(sock >= 0); |
48b7cdc2 | 992 | ASSERT_RCU_READ_LOCKED(); |
f20baf8e | 993 | |
28ab034a | 994 | lttng_ht_lookup(the_agent_apps_ht_by_sock, (void *) ((unsigned long) sock), &iter); |
f20baf8e | 995 | node = lttng_ht_iter_get_node_ulong(&iter); |
cd9adb8b | 996 | if (node == nullptr) { |
f20baf8e DG |
997 | goto error; |
998 | } | |
0114db0e | 999 | app = lttng::utils::container_of(node, &agent_app::node); |
f20baf8e | 1000 | |
022d91ba | 1001 | DBG3("Agent app pid %d found by sock %d.", app->pid, sock); |
f20baf8e DG |
1002 | return app; |
1003 | ||
1004 | error: | |
022d91ba | 1005 | DBG3("Agent app NOT found by sock %d.", sock); |
cd9adb8b | 1006 | return nullptr; |
f20baf8e DG |
1007 | } |
1008 | ||
1009 | /* | |
022d91ba | 1010 | * Add agent application object to the global hash table. |
f20baf8e | 1011 | */ |
022d91ba | 1012 | void agent_add_app(struct agent_app *app) |
f20baf8e | 1013 | { |
a0377dfe | 1014 | LTTNG_ASSERT(app); |
f20baf8e | 1015 | |
022d91ba | 1016 | DBG3("Agent adding app sock: %d and pid: %d to ht", app->sock->fd, app->pid); |
412d7227 | 1017 | lttng_ht_add_unique_ulong(the_agent_apps_ht_by_sock, &app->node); |
f20baf8e DG |
1018 | } |
1019 | ||
f20baf8e | 1020 | /* |
022d91ba | 1021 | * Delete agent application from the global hash table. |
d558f236 JG |
1022 | * |
1023 | * rcu_read_lock() must be held by the caller. | |
f20baf8e | 1024 | */ |
022d91ba | 1025 | void agent_delete_app(struct agent_app *app) |
f20baf8e DG |
1026 | { |
1027 | int ret; | |
1028 | struct lttng_ht_iter iter; | |
1029 | ||
a0377dfe | 1030 | LTTNG_ASSERT(app); |
48b7cdc2 | 1031 | ASSERT_RCU_READ_LOCKED(); |
f20baf8e | 1032 | |
022d91ba | 1033 | DBG3("Agent deleting app pid: %d and sock: %d", app->pid, app->sock->fd); |
f20baf8e DG |
1034 | |
1035 | iter.iter.node = &app->node.node; | |
412d7227 | 1036 | ret = lttng_ht_del(the_agent_apps_ht_by_sock, &iter); |
a0377dfe | 1037 | LTTNG_ASSERT(!ret); |
f20baf8e DG |
1038 | } |
1039 | ||
1040 | /* | |
e785906c | 1041 | * Destroy an agent application object by detaching it from its corresponding |
022d91ba | 1042 | * UST app if one is connected by closing the socket. Finally, perform a |
428de77a | 1043 | * delayed memory reclaim. |
f20baf8e | 1044 | */ |
022d91ba | 1045 | void agent_destroy_app(struct agent_app *app) |
f20baf8e | 1046 | { |
a0377dfe | 1047 | LTTNG_ASSERT(app); |
f20baf8e DG |
1048 | |
1049 | if (app->sock) { | |
1050 | app->sock->ops->close(app->sock); | |
1051 | lttcomm_destroy_sock(app->sock); | |
1052 | } | |
1053 | ||
022d91ba | 1054 | call_rcu(&app->node.head, destroy_app_agent_rcu); |
f20baf8e DG |
1055 | } |
1056 | ||
0475c50c | 1057 | /* |
022d91ba | 1058 | * Initialize an already allocated agent object. |
0475c50c DG |
1059 | * |
1060 | * Return 0 on success or else a negative errno value. | |
1061 | */ | |
022d91ba | 1062 | int agent_init(struct agent *agt) |
0475c50c DG |
1063 | { |
1064 | int ret; | |
1065 | ||
a0377dfe | 1066 | LTTNG_ASSERT(agt); |
0475c50c | 1067 | |
022d91ba DG |
1068 | agt->events = lttng_ht_new(0, LTTNG_HT_TYPE_STRING); |
1069 | if (!agt->events) { | |
0475c50c DG |
1070 | ret = -ENOMEM; |
1071 | goto error; | |
1072 | } | |
fefd409b | 1073 | lttng_ht_node_init_u64(&agt->node, agt->domain); |
0475c50c | 1074 | |
bdf64013 | 1075 | CDS_INIT_LIST_HEAD(&agt->app_ctx_list); |
0475c50c DG |
1076 | return 0; |
1077 | ||
1078 | error: | |
1079 | return ret; | |
1080 | } | |
1081 | ||
fefd409b DG |
1082 | /* |
1083 | * Add agent object to the given hash table. | |
1084 | */ | |
1085 | void agent_add(struct agent *agt, struct lttng_ht *ht) | |
1086 | { | |
a0377dfe FD |
1087 | LTTNG_ASSERT(agt); |
1088 | LTTNG_ASSERT(ht); | |
fefd409b DG |
1089 | |
1090 | DBG3("Agent adding from domain %d", agt->domain); | |
1091 | ||
fefd409b | 1092 | lttng_ht_add_unique_u64(ht, &agt->node); |
fefd409b DG |
1093 | } |
1094 | ||
1095 | /* | |
1096 | * Create an agent object for the given domain. | |
1097 | * | |
1098 | * Return the allocated agent or NULL on error. | |
1099 | */ | |
1100 | struct agent *agent_create(enum lttng_domain_type domain) | |
1101 | { | |
1102 | int ret; | |
1103 | struct agent *agt; | |
1104 | ||
64803277 | 1105 | agt = zmalloc<agent>(); |
fefd409b DG |
1106 | if (!agt) { |
1107 | goto error; | |
1108 | } | |
1109 | agt->domain = domain; | |
1110 | ||
1111 | ret = agent_init(agt); | |
1112 | if (ret < 0) { | |
1113 | free(agt); | |
cd9adb8b | 1114 | agt = nullptr; |
fefd409b DG |
1115 | goto error; |
1116 | } | |
1117 | ||
1118 | error: | |
1119 | return agt; | |
1120 | } | |
1121 | ||
0475c50c | 1122 | /* |
51755dc8 JG |
1123 | * Create a newly allocated agent event data structure. |
1124 | * Ownership of filter_expression is taken. | |
0475c50c DG |
1125 | * |
1126 | * Return a new object else NULL on error. | |
1127 | */ | |
022d91ba | 1128 | struct agent_event *agent_create_event(const char *name, |
28ab034a JG |
1129 | enum lttng_loglevel_type loglevel_type, |
1130 | int loglevel_value, | |
1131 | struct lttng_bytecode *filter, | |
1132 | char *filter_expression) | |
0475c50c | 1133 | { |
cd9adb8b | 1134 | struct agent_event *event = nullptr; |
0475c50c | 1135 | |
6b10b3b0 AM |
1136 | DBG3("Agent create new event with name %s, loglevel type %d, \ |
1137 | loglevel value %d and filter %s", | |
28ab034a JG |
1138 | name, |
1139 | loglevel_type, | |
1140 | loglevel_value, | |
1141 | filter_expression ? filter_expression : "NULL"); | |
0475c50c | 1142 | |
51755dc8 JG |
1143 | if (!name) { |
1144 | ERR("Failed to create agent event; no name provided."); | |
0475c50c DG |
1145 | goto error; |
1146 | } | |
1147 | ||
64803277 | 1148 | event = zmalloc<agent_event>(); |
51755dc8 JG |
1149 | if (!event) { |
1150 | goto error; | |
0475c50c DG |
1151 | } |
1152 | ||
51755dc8 JG |
1153 | strncpy(event->name, name, sizeof(event->name)); |
1154 | event->name[sizeof(event->name) - 1] = '\0'; | |
1155 | lttng_ht_node_init_str(&event->node, event->name); | |
be6a6276 | 1156 | |
2106efa0 | 1157 | event->loglevel_value = loglevel_value; |
51755dc8 JG |
1158 | event->loglevel_type = loglevel_type; |
1159 | event->filter = filter; | |
1160 | event->filter_expression = filter_expression; | |
0475c50c DG |
1161 | error: |
1162 | return event; | |
1163 | } | |
1164 | ||
1165 | /* | |
022d91ba | 1166 | * Unique add of a agent event to an agent object. |
0475c50c | 1167 | */ |
022d91ba | 1168 | void agent_add_event(struct agent_event *event, struct agent *agt) |
0475c50c | 1169 | { |
a0377dfe FD |
1170 | LTTNG_ASSERT(event); |
1171 | LTTNG_ASSERT(agt); | |
1172 | LTTNG_ASSERT(agt->events); | |
0475c50c | 1173 | |
022d91ba | 1174 | DBG3("Agent adding event %s", event->name); |
022d91ba | 1175 | add_unique_agent_event(agt->events, event); |
022d91ba | 1176 | agt->being_used = 1; |
0475c50c DG |
1177 | } |
1178 | ||
bdf64013 JG |
1179 | /* |
1180 | * Unique add of a agent context to an agent object. | |
1181 | */ | |
df4f5a87 | 1182 | int agent_add_context(const struct lttng_event_context *ctx, struct agent *agt) |
bdf64013 JG |
1183 | { |
1184 | int ret = LTTNG_OK; | |
cd9adb8b | 1185 | struct agent_app_ctx *agent_ctx = nullptr; |
bdf64013 | 1186 | |
a0377dfe FD |
1187 | LTTNG_ASSERT(ctx); |
1188 | LTTNG_ASSERT(agt); | |
1189 | LTTNG_ASSERT(agt->events); | |
1190 | LTTNG_ASSERT(ctx->ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT); | |
bdf64013 JG |
1191 | |
1192 | agent_ctx = create_app_ctx(ctx); | |
1193 | if (!agent_ctx) { | |
1194 | ret = LTTNG_ERR_NOMEM; | |
1195 | goto end; | |
1196 | } | |
1197 | ||
28ab034a | 1198 | DBG3("Agent adding context %s:%s", ctx->u.app_ctx.provider_name, ctx->u.app_ctx.ctx_name); |
bdf64013 JG |
1199 | cds_list_add_tail_rcu(&agent_ctx->list_node, &agt->app_ctx_list); |
1200 | end: | |
1201 | return ret; | |
1202 | } | |
1203 | ||
0475c50c | 1204 | /* |
e261a6cc | 1205 | * Find multiple agent events sharing the given name. |
4a4ab2c3 | 1206 | * |
e261a6cc PP |
1207 | * RCU read side lock MUST be acquired. It must be held for the |
1208 | * duration of the iteration. | |
4a4ab2c3 | 1209 | * |
e261a6cc | 1210 | * Sets the given iterator. |
4a4ab2c3 | 1211 | */ |
28ab034a | 1212 | void agent_find_events_by_name(const char *name, struct agent *agt, struct lttng_ht_iter *iter) |
4a4ab2c3 | 1213 | { |
4a4ab2c3 | 1214 | struct lttng_ht *ht; |
022d91ba | 1215 | struct agent_ht_key key; |
4a4ab2c3 | 1216 | |
a0377dfe FD |
1217 | LTTNG_ASSERT(name); |
1218 | LTTNG_ASSERT(agt); | |
1219 | LTTNG_ASSERT(agt->events); | |
1220 | LTTNG_ASSERT(iter); | |
48b7cdc2 | 1221 | ASSERT_RCU_READ_LOCKED(); |
4a4ab2c3 | 1222 | |
022d91ba | 1223 | ht = agt->events; |
4a4ab2c3 DG |
1224 | key.name = name; |
1225 | ||
28ab034a JG |
1226 | cds_lfht_lookup(ht->ht, |
1227 | ht->hash_fct((void *) name, lttng_ht_seed), | |
1228 | ht_match_event_by_name, | |
1229 | &key, | |
1230 | &iter->iter); | |
e261a6cc | 1231 | } |
4a4ab2c3 | 1232 | |
44760c20 JR |
1233 | /* |
1234 | * Find the agent event matching a trigger. | |
1235 | * | |
1236 | * RCU read side lock MUST be acquired. It must be held for as long as | |
1237 | * the returned agent_event is used. | |
1238 | * | |
1239 | * Return object if found else NULL. | |
1240 | */ | |
28ab034a JG |
1241 | struct agent_event *agent_find_event_by_trigger(const struct lttng_trigger *trigger, |
1242 | struct agent *agt) | |
44760c20 JR |
1243 | { |
1244 | enum lttng_condition_status c_status; | |
1245 | enum lttng_event_rule_status er_status; | |
1246 | enum lttng_domain_type domain; | |
1247 | const struct lttng_condition *condition; | |
1248 | const struct lttng_event_rule *rule; | |
1249 | const char *name; | |
1250 | const char *filter_expression; | |
85b05318 | 1251 | const struct lttng_log_level_rule *log_level_rule; |
44760c20 JR |
1252 | /* Unused when loglevel_type is 'ALL'. */ |
1253 | int loglevel_value = 0; | |
1254 | enum lttng_loglevel_type loglevel_type; | |
695f7044 JR |
1255 | event_rule_logging_get_name_pattern logging_get_name_pattern; |
1256 | event_rule_logging_get_log_level_rule logging_get_log_level_rule; | |
44760c20 | 1257 | |
a0377dfe FD |
1258 | LTTNG_ASSERT(agt); |
1259 | LTTNG_ASSERT(agt->events); | |
48b7cdc2 | 1260 | ASSERT_RCU_READ_LOCKED(); |
44760c20 JR |
1261 | |
1262 | condition = lttng_trigger_get_const_condition(trigger); | |
1263 | ||
a0377dfe | 1264 | LTTNG_ASSERT(lttng_condition_get_type(condition) == |
28ab034a | 1265 | LTTNG_CONDITION_TYPE_EVENT_RULE_MATCHES); |
44760c20 | 1266 | |
28ab034a | 1267 | c_status = lttng_condition_event_rule_matches_get_rule(condition, &rule); |
a0377dfe | 1268 | LTTNG_ASSERT(c_status == LTTNG_CONDITION_STATUS_OK); |
44760c20 | 1269 | |
695f7044 JR |
1270 | switch (lttng_event_rule_get_type(rule)) { |
1271 | case LTTNG_EVENT_RULE_TYPE_JUL_LOGGING: | |
28ab034a JG |
1272 | logging_get_name_pattern = lttng_event_rule_jul_logging_get_name_pattern; |
1273 | logging_get_log_level_rule = lttng_event_rule_jul_logging_get_log_level_rule; | |
695f7044 JR |
1274 | break; |
1275 | case LTTNG_EVENT_RULE_TYPE_LOG4J_LOGGING: | |
28ab034a JG |
1276 | logging_get_name_pattern = lttng_event_rule_log4j_logging_get_name_pattern; |
1277 | logging_get_log_level_rule = lttng_event_rule_log4j_logging_get_log_level_rule; | |
695f7044 JR |
1278 | break; |
1279 | case LTTNG_EVENT_RULE_TYPE_PYTHON_LOGGING: | |
28ab034a JG |
1280 | logging_get_name_pattern = lttng_event_rule_python_logging_get_name_pattern; |
1281 | logging_get_log_level_rule = lttng_event_rule_python_logging_get_log_level_rule; | |
695f7044 JR |
1282 | break; |
1283 | default: | |
1284 | abort(); | |
1285 | break; | |
1286 | } | |
44760c20 JR |
1287 | |
1288 | domain = lttng_event_rule_get_domain_type(rule); | |
a0377dfe | 1289 | LTTNG_ASSERT(domain == LTTNG_DOMAIN_JUL || domain == LTTNG_DOMAIN_LOG4J || |
28ab034a | 1290 | domain == LTTNG_DOMAIN_PYTHON); |
44760c20 | 1291 | |
8bc73626 | 1292 | /* Get the event's pattern name ('name' in the legacy terminology). */ |
695f7044 | 1293 | er_status = logging_get_name_pattern(rule, &name); |
a0377dfe | 1294 | LTTNG_ASSERT(er_status == LTTNG_EVENT_RULE_STATUS_OK); |
44760c20 JR |
1295 | |
1296 | /* Get the internal filter expression. */ | |
1297 | filter_expression = lttng_event_rule_get_filter(rule); | |
1298 | ||
85b05318 | 1299 | /* Map log_level_rule to loglevel value. */ |
695f7044 | 1300 | er_status = logging_get_log_level_rule(rule, &log_level_rule); |
85b05318 JR |
1301 | if (er_status == LTTNG_EVENT_RULE_STATUS_UNSET) { |
1302 | loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL; | |
1303 | loglevel_value = 0; | |
1304 | } else if (er_status == LTTNG_EVENT_RULE_STATUS_OK) { | |
1305 | lttng_log_level_rule_to_loglevel(log_level_rule, &loglevel_type, &loglevel_value); | |
1306 | } else { | |
1307 | abort(); | |
44760c20 JR |
1308 | } |
1309 | ||
28ab034a | 1310 | return agent_find_event(name, loglevel_type, loglevel_value, filter_expression, agt); |
44760c20 JR |
1311 | } |
1312 | ||
e261a6cc PP |
1313 | /* |
1314 | * Get the next agent event duplicate by name. This should be called | |
1315 | * after a call to agent_find_events_by_name() to iterate on events. | |
1316 | * | |
1317 | * The RCU read lock must be held during the iteration and for as long | |
1318 | * as the object the iterator points to remains in use. | |
1319 | */ | |
28ab034a | 1320 | void agent_event_next_duplicate(const char *name, struct agent *agt, struct lttng_ht_iter *iter) |
e261a6cc PP |
1321 | { |
1322 | struct agent_ht_key key; | |
4a4ab2c3 | 1323 | |
48b7cdc2 FD |
1324 | ASSERT_RCU_READ_LOCKED(); |
1325 | ||
e261a6cc PP |
1326 | key.name = name; |
1327 | ||
28ab034a | 1328 | cds_lfht_next_duplicate(agt->events->ht, ht_match_event_by_name, &key, &iter->iter); |
4a4ab2c3 DG |
1329 | } |
1330 | ||
1331 | /* | |
6b10b3b0 | 1332 | * Find a agent event in the given agent using name, loglevel and filter. |
0475c50c | 1333 | * |
1e17eae2 JG |
1334 | * RCU read side lock MUST be acquired. It must be kept for as long as |
1335 | * the returned agent_event is used. | |
0475c50c DG |
1336 | * |
1337 | * Return object if found else NULL. | |
1338 | */ | |
a9319624 | 1339 | struct agent_event *agent_find_event(const char *name, |
28ab034a JG |
1340 | enum lttng_loglevel_type loglevel_type, |
1341 | int loglevel_value, | |
1342 | const char *filter_expression, | |
1343 | struct agent *agt) | |
0475c50c DG |
1344 | { |
1345 | struct lttng_ht_node_str *node; | |
1346 | struct lttng_ht_iter iter; | |
4a4ab2c3 | 1347 | struct lttng_ht *ht; |
022d91ba | 1348 | struct agent_ht_key key; |
0475c50c | 1349 | |
a0377dfe FD |
1350 | LTTNG_ASSERT(name); |
1351 | LTTNG_ASSERT(agt); | |
1352 | LTTNG_ASSERT(agt->events); | |
48b7cdc2 | 1353 | ASSERT_RCU_READ_LOCKED(); |
0475c50c | 1354 | |
022d91ba | 1355 | ht = agt->events; |
4a4ab2c3 | 1356 | key.name = name; |
2106efa0 | 1357 | key.loglevel_value = loglevel_value; |
a9319624 | 1358 | key.loglevel_type = loglevel_type; |
6b10b3b0 | 1359 | key.filter_expression = filter_expression; |
4a4ab2c3 | 1360 | |
28ab034a JG |
1361 | cds_lfht_lookup(ht->ht, |
1362 | ht->hash_fct((void *) name, lttng_ht_seed), | |
1363 | ht_match_event, | |
1364 | &key, | |
1365 | &iter.iter); | |
0475c50c | 1366 | node = lttng_ht_iter_get_node_str(&iter); |
cd9adb8b | 1367 | if (node == nullptr) { |
0475c50c DG |
1368 | goto error; |
1369 | } | |
1370 | ||
022d91ba | 1371 | DBG3("Agent event found %s.", name); |
0114db0e | 1372 | return lttng::utils::container_of(node, &agent_event::node); |
0475c50c DG |
1373 | |
1374 | error: | |
a51e817b | 1375 | DBG3("Agent event NOT found %s.", name); |
cd9adb8b | 1376 | return nullptr; |
0475c50c DG |
1377 | } |
1378 | ||
0475c50c | 1379 | /* |
022d91ba DG |
1380 | * Free given agent event. This event must not be globally visible at this |
1381 | * point (only expected to be used on failure just after event creation). After | |
1382 | * this call, the pointer is not usable anymore. | |
0475c50c | 1383 | */ |
022d91ba | 1384 | void agent_destroy_event(struct agent_event *event) |
0475c50c | 1385 | { |
a0377dfe | 1386 | LTTNG_ASSERT(event); |
0475c50c | 1387 | |
971da06a | 1388 | free(event->filter); |
8404118c | 1389 | free(event->filter_expression); |
51755dc8 | 1390 | free(event->exclusion); |
0475c50c DG |
1391 | free(event); |
1392 | } | |
1393 | ||
28ab034a | 1394 | static void destroy_app_ctx_rcu(struct rcu_head *head) |
bdf64013 | 1395 | { |
28ab034a | 1396 | struct agent_app_ctx *ctx = lttng::utils::container_of(head, &agent_app_ctx::rcu_node); |
bdf64013 JG |
1397 | |
1398 | destroy_app_ctx(ctx); | |
1399 | } | |
1400 | ||
0475c50c | 1401 | /* |
35ed21a5 | 1402 | * Destroy an agent completely. |
0475c50c | 1403 | */ |
022d91ba | 1404 | void agent_destroy(struct agent *agt) |
0475c50c DG |
1405 | { |
1406 | struct lttng_ht_node_str *node; | |
1407 | struct lttng_ht_iter iter; | |
bdf64013 | 1408 | struct agent_app_ctx *ctx; |
0475c50c | 1409 | |
a0377dfe | 1410 | LTTNG_ASSERT(agt); |
0475c50c | 1411 | |
022d91ba | 1412 | DBG3("Agent destroy"); |
0475c50c | 1413 | |
0475c50c | 1414 | rcu_read_lock(); |
28ab034a | 1415 | cds_lfht_for_each_entry (agt->events->ht, &iter.iter, node, node) { |
0475c50c | 1416 | int ret; |
022d91ba | 1417 | struct agent_event *event; |
29c0fd4d DG |
1418 | |
1419 | /* | |
bdf64013 JG |
1420 | * When destroying an event, we have to try to disable it on the |
1421 | * agent side so the event stops generating data. The return | |
1422 | * value is not important since we have to continue anyway | |
1423 | * destroying the object. | |
29c0fd4d | 1424 | */ |
0114db0e | 1425 | event = lttng::utils::container_of(node, &agent_event::node); |
022d91ba | 1426 | (void) agent_disable_event(event, agt->domain); |
0475c50c | 1427 | |
022d91ba | 1428 | ret = lttng_ht_del(agt->events, &iter); |
a0377dfe | 1429 | LTTNG_ASSERT(!ret); |
022d91ba | 1430 | call_rcu(&node->head, destroy_event_agent_rcu); |
0475c50c | 1431 | } |
0475c50c | 1432 | |
28ab034a JG |
1433 | cds_list_for_each_entry_rcu(ctx, &agt->app_ctx_list, list_node) |
1434 | { | |
bdf64013 JG |
1435 | (void) disable_context(ctx, agt->domain); |
1436 | cds_list_del(&ctx->list_node); | |
1437 | call_rcu(&ctx->rcu_node, destroy_app_ctx_rcu); | |
1438 | } | |
1439 | rcu_read_unlock(); | |
3c339053 | 1440 | lttng_ht_destroy(agt->events); |
35ed21a5 | 1441 | free(agt); |
f20baf8e DG |
1442 | } |
1443 | ||
1444 | /* | |
6a4e4039 | 1445 | * Allocate agent_apps_ht_by_sock. |
f20baf8e | 1446 | */ |
cd9adb8b | 1447 | int agent_app_ht_alloc() |
f20baf8e | 1448 | { |
412d7227 SM |
1449 | the_agent_apps_ht_by_sock = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
1450 | return the_agent_apps_ht_by_sock ? 0 : -1; | |
6a4e4039 JG |
1451 | } |
1452 | ||
1453 | /* | |
1454 | * Destroy a agent application by socket. | |
1455 | */ | |
1456 | void agent_destroy_app_by_sock(int sock) | |
1457 | { | |
1458 | struct agent_app *app; | |
1459 | ||
a0377dfe | 1460 | LTTNG_ASSERT(sock >= 0); |
6a4e4039 JG |
1461 | |
1462 | /* | |
1463 | * Not finding an application is a very important error that should NEVER | |
1464 | * happen. The hash table deletion is ONLY done through this call when the | |
1465 | * main sessiond thread is torn down. | |
1466 | */ | |
1467 | rcu_read_lock(); | |
1468 | app = agent_find_app_by_sock(sock); | |
a0377dfe | 1469 | LTTNG_ASSERT(app); |
6a4e4039 JG |
1470 | |
1471 | /* RCU read side lock is assumed to be held by this function. */ | |
1472 | agent_delete_app(app); | |
1473 | ||
1474 | /* The application is freed in a RCU call but the socket is closed here. */ | |
1475 | agent_destroy_app(app); | |
1476 | rcu_read_unlock(); | |
1477 | } | |
1478 | ||
1479 | /* | |
1480 | * Clean-up the agent app hash table and destroy it. | |
1481 | */ | |
cd9adb8b | 1482 | void agent_app_ht_clean() |
6a4e4039 JG |
1483 | { |
1484 | struct lttng_ht_node_ulong *node; | |
1485 | struct lttng_ht_iter iter; | |
1486 | ||
412d7227 | 1487 | if (!the_agent_apps_ht_by_sock) { |
a433283e JG |
1488 | return; |
1489 | } | |
6a4e4039 | 1490 | rcu_read_lock(); |
28ab034a | 1491 | cds_lfht_for_each_entry (the_agent_apps_ht_by_sock->ht, &iter.iter, node, node) { |
6a4e4039 JG |
1492 | struct agent_app *app; |
1493 | ||
0114db0e | 1494 | app = lttng::utils::container_of(node, &agent_app::node); |
6a4e4039 JG |
1495 | agent_destroy_app_by_sock(app->sock->fd); |
1496 | } | |
1497 | rcu_read_unlock(); | |
1498 | ||
412d7227 | 1499 | lttng_ht_destroy(the_agent_apps_ht_by_sock); |
f20baf8e DG |
1500 | } |
1501 | ||
1502 | /* | |
022d91ba | 1503 | * Update a agent application (given socket) using the given agent. |
f20baf8e DG |
1504 | * |
1505 | * Note that this function is most likely to be used with a tracing session | |
1506 | * thus the caller should make sure to hold the appropriate lock(s). | |
1507 | */ | |
733c9165 | 1508 | void agent_update(const struct agent *agt, const struct agent_app *app) |
f20baf8e DG |
1509 | { |
1510 | int ret; | |
022d91ba | 1511 | struct agent_event *event; |
f20baf8e | 1512 | struct lttng_ht_iter iter; |
bdf64013 | 1513 | struct agent_app_ctx *ctx; |
f20baf8e | 1514 | |
a0377dfe FD |
1515 | LTTNG_ASSERT(agt); |
1516 | LTTNG_ASSERT(app); | |
f20baf8e | 1517 | |
733c9165 | 1518 | DBG("Agent updating app: pid = %ld", (long) app->pid); |
f20baf8e DG |
1519 | |
1520 | rcu_read_lock(); | |
bdf64013 JG |
1521 | /* |
1522 | * We are in the registration path thus if the application is gone, | |
1523 | * there is a serious code flow error. | |
1524 | */ | |
733c9165 | 1525 | |
28ab034a | 1526 | cds_lfht_for_each_entry (agt->events->ht, &iter.iter, event, node.node) { |
f20baf8e | 1527 | /* Skip event if disabled. */ |
44760c20 | 1528 | if (!AGENT_EVENT_IS_ENABLED(event)) { |
f20baf8e DG |
1529 | continue; |
1530 | } | |
1531 | ||
f20baf8e DG |
1532 | ret = enable_event(app, event); |
1533 | if (ret != LTTNG_OK) { | |
022d91ba | 1534 | DBG2("Agent update unable to enable event %s on app pid: %d sock %d", |
28ab034a JG |
1535 | event->name, |
1536 | app->pid, | |
1537 | app->sock->fd); | |
f20baf8e DG |
1538 | /* Let's try the others here and don't assume the app is dead. */ |
1539 | continue; | |
1540 | } | |
1541 | } | |
bdf64013 | 1542 | |
28ab034a JG |
1543 | cds_list_for_each_entry_rcu(ctx, &agt->app_ctx_list, list_node) |
1544 | { | |
bdf64013 JG |
1545 | ret = app_context_op(app, ctx, AGENT_CMD_APP_CTX_ENABLE); |
1546 | if (ret != LTTNG_OK) { | |
1547 | DBG2("Agent update unable to add application context %s:%s on app pid: %d sock %d", | |
28ab034a JG |
1548 | ctx->provider_name, |
1549 | ctx->ctx_name, | |
1550 | app->pid, | |
1551 | app->sock->fd); | |
bdf64013 JG |
1552 | continue; |
1553 | } | |
1554 | } | |
1555 | ||
f20baf8e | 1556 | rcu_read_unlock(); |
0475c50c | 1557 | } |
44760c20 JR |
1558 | |
1559 | /* | |
1560 | * Allocate the per-event notifier domain agent hash table. It is lazily | |
1561 | * populated as domains are used. | |
1562 | */ | |
cd9adb8b | 1563 | int agent_by_event_notifier_domain_ht_create() |
44760c20 | 1564 | { |
412d7227 SM |
1565 | the_trigger_agents_ht_by_domain = lttng_ht_new(0, LTTNG_HT_TYPE_U64); |
1566 | return the_trigger_agents_ht_by_domain ? 0 : -1; | |
44760c20 JR |
1567 | } |
1568 | ||
1569 | /* | |
1570 | * Clean-up the per-event notifier domain agent hash table and destroy it. | |
1571 | */ | |
cd9adb8b | 1572 | void agent_by_event_notifier_domain_ht_destroy() |
44760c20 JR |
1573 | { |
1574 | struct lttng_ht_node_u64 *node; | |
1575 | struct lttng_ht_iter iter; | |
1576 | ||
412d7227 | 1577 | if (!the_trigger_agents_ht_by_domain) { |
44760c20 JR |
1578 | return; |
1579 | } | |
1580 | ||
1581 | rcu_read_lock(); | |
28ab034a JG |
1582 | cds_lfht_for_each_entry (the_trigger_agents_ht_by_domain->ht, &iter.iter, node, node) { |
1583 | struct agent *agent = lttng::utils::container_of(node, &agent::node); | |
1584 | const int ret = lttng_ht_del(the_trigger_agents_ht_by_domain, &iter); | |
44760c20 | 1585 | |
a0377dfe | 1586 | LTTNG_ASSERT(ret == 0); |
44760c20 JR |
1587 | agent_destroy(agent); |
1588 | } | |
1589 | ||
1590 | rcu_read_unlock(); | |
412d7227 | 1591 | lttng_ht_destroy(the_trigger_agents_ht_by_domain); |
44760c20 JR |
1592 | } |
1593 | ||
28ab034a | 1594 | struct agent *agent_find_by_event_notifier_domain(enum lttng_domain_type domain_type) |
44760c20 | 1595 | { |
cd9adb8b | 1596 | struct agent *agt = nullptr; |
44760c20 JR |
1597 | struct lttng_ht_node_u64 *node; |
1598 | struct lttng_ht_iter iter; | |
1599 | const uint64_t key = (uint64_t) domain_type; | |
1600 | ||
a0377dfe | 1601 | LTTNG_ASSERT(the_trigger_agents_ht_by_domain); |
44760c20 JR |
1602 | |
1603 | DBG3("Per-event notifier domain agent lookup for domain '%s'", | |
28ab034a | 1604 | lttng_domain_type_str(domain_type)); |
44760c20 | 1605 | |
412d7227 | 1606 | lttng_ht_lookup(the_trigger_agents_ht_by_domain, &key, &iter); |
44760c20 JR |
1607 | node = lttng_ht_iter_get_node_u64(&iter); |
1608 | if (!node) { | |
1609 | goto end; | |
1610 | } | |
1611 | ||
0114db0e | 1612 | agt = lttng::utils::container_of(node, &agent::node); |
44760c20 JR |
1613 | |
1614 | end: | |
1615 | return agt; | |
1616 | } |