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90aa04a1 FD |
1 | /* |
2 | * Copyright (C) 2020 Francis Deslauriers <francis.deslauriers@efficios.com> | |
3 | * | |
4 | * SPDX-License-Identifier: GPL-2.0-only | |
5 | * | |
6 | */ | |
7 | ||
8 | #include <fcntl.h> | |
9 | #include <sys/mman.h> | |
10 | #include <sys/stat.h> | |
11 | #include <unistd.h> | |
12 | #include <urcu/compiler.h> | |
533a90fb | 13 | #include <pthread.h> |
90aa04a1 FD |
14 | |
15 | #include <common/error.h> | |
16 | #include <common/hashtable/hashtable.h> | |
17 | #include <common/index-allocator.h> | |
18 | #include <common/kernel-ctl/kernel-ctl.h> | |
533a90fb | 19 | #include <common/shm.h> |
90aa04a1 FD |
20 | #include <lttng/trigger/trigger-internal.h> |
21 | ||
22 | #include "event-notifier-error-accounting.h" | |
533a90fb FD |
23 | #include "lttng-ust-error.h" |
24 | #include "ust-app.h" | |
90aa04a1 FD |
25 | |
26 | #define ERROR_COUNTER_INDEX_HT_INITIAL_SIZE 16 | |
27 | ||
28 | struct index_ht_entry { | |
29 | struct lttng_ht_node_u64 node; | |
30 | uint64_t error_counter_index; | |
31 | struct rcu_head rcu_head; | |
32 | }; | |
33 | ||
533a90fb FD |
34 | struct error_account_entry { |
35 | struct lttng_ht_node_u64 node; | |
36 | struct rcu_head rcu_head; | |
37 | struct ustctl_daemon_counter *daemon_counter; | |
38 | /* | |
39 | * Those `lttng_ust_abi_object_data` are anonymous handles to the counters | |
40 | * objects. | |
41 | * They are only used to be duplicated for each new applications of the | |
42 | * user. To destroy them, call with the `sock` parameter set to -1. | |
43 | * e.g. `ustctl_release_object(-1, data)`; | |
44 | */ | |
45 | struct lttng_ust_abi_object_data *counter; | |
46 | struct lttng_ust_abi_object_data **cpu_counters; | |
47 | int nr_counter_cpu_fds; | |
48 | }; | |
49 | ||
90aa04a1 FD |
50 | struct kernel_error_account_entry { |
51 | int kernel_event_notifier_error_counter_fd; | |
52 | }; | |
53 | ||
54 | static struct kernel_error_account_entry kernel_error_accountant; | |
55 | ||
56 | /* Hashtable mapping event notifier token to index_ht_entry. */ | |
57 | static struct lttng_ht *error_counter_indexes_ht; | |
58 | ||
533a90fb FD |
59 | /* Hashtable mapping uid to error_account_entry. */ |
60 | static struct lttng_ht *error_counter_uid_ht; | |
61 | ||
90aa04a1 FD |
62 | static uint64_t error_counter_size; |
63 | static struct lttng_index_allocator *index_allocator; | |
64 | ||
533a90fb FD |
65 | static inline void get_trigger_info_for_log(const struct lttng_trigger *trigger, |
66 | const char **trigger_name, | |
67 | uid_t *trigger_owner_uid) | |
68 | { | |
69 | enum lttng_trigger_status trigger_status; | |
70 | ||
71 | trigger_status = lttng_trigger_get_name(trigger, trigger_name); | |
72 | switch (trigger_status) { | |
73 | case LTTNG_TRIGGER_STATUS_OK: | |
74 | break; | |
75 | case LTTNG_TRIGGER_STATUS_UNSET: | |
76 | *trigger_name = "(unset)"; | |
77 | break; | |
78 | default: | |
79 | abort(); | |
80 | } | |
81 | ||
82 | trigger_status = lttng_trigger_get_owner_uid(trigger, | |
83 | trigger_owner_uid); | |
84 | assert(trigger_status == LTTNG_TRIGGER_STATUS_OK); | |
85 | } | |
86 | ||
90aa04a1 FD |
87 | static inline |
88 | const char *error_accounting_status_str( | |
89 | enum event_notifier_error_accounting_status status) | |
90 | { | |
91 | switch (status) { | |
92 | case EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK: | |
93 | return "OK"; | |
94 | case EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR: | |
95 | return "ERROR"; | |
96 | case EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NOT_FOUND: | |
97 | return "NOT_FOUND"; | |
98 | case EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NOMEM: | |
99 | return "NOMEM"; | |
100 | case EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NO_INDEX_AVAILABLE: | |
101 | return "NO_INDEX_AVAILABLE"; | |
533a90fb FD |
102 | case EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_APP_DEAD: |
103 | return "APP_DEAD"; | |
90aa04a1 FD |
104 | default: |
105 | abort(); | |
106 | } | |
107 | } | |
108 | ||
109 | enum event_notifier_error_accounting_status | |
110 | event_notifier_error_accounting_init(uint64_t nb_bucket) | |
111 | { | |
112 | enum event_notifier_error_accounting_status status; | |
113 | ||
114 | index_allocator = lttng_index_allocator_create(nb_bucket); | |
115 | if (!index_allocator) { | |
116 | ERR("Failed to allocate event notifier error counter index"); | |
117 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NOMEM; | |
118 | goto error_index_allocator; | |
119 | } | |
120 | ||
121 | error_counter_indexes_ht = lttng_ht_new( | |
122 | ERROR_COUNTER_INDEX_HT_INITIAL_SIZE, LTTNG_HT_TYPE_U64); | |
123 | if (!error_counter_indexes_ht) { | |
533a90fb FD |
124 | ERR("Failed to allocate error counter indices hash table"); |
125 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NOMEM; | |
126 | goto error_index_allocator; | |
127 | } | |
128 | ||
129 | error_counter_uid_ht = lttng_ht_new( | |
130 | ERROR_COUNTER_INDEX_HT_INITIAL_SIZE, LTTNG_HT_TYPE_U64); | |
131 | if (!error_counter_uid_ht) { | |
132 | ERR("Failed to allocate UID to error counter accountant hash table"); | |
90aa04a1 FD |
133 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NOMEM; |
134 | goto error_index_allocator; | |
135 | } | |
136 | ||
137 | error_counter_size = nb_bucket; | |
138 | ||
139 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; | |
140 | ||
141 | error_index_allocator: | |
142 | return status; | |
143 | } | |
144 | ||
145 | static | |
146 | enum event_notifier_error_accounting_status get_error_counter_index_for_token( | |
147 | uint64_t tracer_token, uint64_t *error_counter_index) | |
148 | { | |
149 | struct lttng_ht_node_u64 *node; | |
150 | struct lttng_ht_iter iter; | |
151 | const struct index_ht_entry *index_entry; | |
152 | enum event_notifier_error_accounting_status status; | |
153 | ||
154 | rcu_read_lock(); | |
155 | lttng_ht_lookup(error_counter_indexes_ht, &tracer_token, &iter); | |
156 | node = lttng_ht_iter_get_node_u64(&iter); | |
157 | if (node) { | |
158 | index_entry = caa_container_of( | |
159 | node, const struct index_ht_entry, node); | |
160 | *error_counter_index = index_entry->error_counter_index; | |
161 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; | |
162 | } else { | |
163 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NOT_FOUND; | |
164 | } | |
165 | ||
166 | rcu_read_unlock(); | |
167 | return status; | |
168 | } | |
169 | ||
533a90fb FD |
170 | #ifdef HAVE_LIBLTTNG_UST_CTL |
171 | static | |
172 | struct error_account_entry *get_uid_accounting_entry(const struct ust_app *app) | |
173 | { | |
174 | struct error_account_entry *entry; | |
175 | struct lttng_ht_node_u64 *node; | |
176 | struct lttng_ht_iter iter; | |
177 | uint64_t key = app->uid; | |
178 | ||
179 | lttng_ht_lookup(error_counter_uid_ht, &key, &iter); | |
180 | node = lttng_ht_iter_get_node_u64(&iter); | |
181 | if(node == NULL) { | |
182 | entry = NULL; | |
183 | } else { | |
184 | entry = caa_container_of(node, struct error_account_entry, node); | |
185 | } | |
186 | ||
187 | return entry; | |
188 | } | |
189 | ||
190 | static | |
191 | struct error_account_entry *create_uid_accounting_entry( | |
192 | const struct ust_app *app) | |
193 | { | |
194 | int i, ret; | |
195 | struct ustctl_daemon_counter *daemon_counter; | |
196 | struct lttng_ust_abi_object_data *counter, **cpu_counters; | |
197 | int *cpu_counter_fds = NULL; | |
198 | struct error_account_entry *entry = NULL; | |
199 | const struct ustctl_counter_dimension dimension = { | |
200 | .size = error_counter_size, | |
201 | .has_underflow = false, | |
202 | .has_overflow = false, | |
203 | }; | |
204 | ||
205 | entry = zmalloc(sizeof(struct error_account_entry)); | |
206 | if (!entry) { | |
207 | PERROR("Failed to allocate event notifier error acounting entry") | |
208 | goto error; | |
209 | } | |
210 | ||
211 | entry->nr_counter_cpu_fds = ustctl_get_nr_cpu_per_counter(); | |
212 | cpu_counter_fds = zmalloc(entry->nr_counter_cpu_fds * sizeof(*cpu_counter_fds)); | |
213 | if (!cpu_counter_fds) { | |
214 | PERROR("Failed to allocate event notifier error counter file descriptors array: application uid = %d, application name = '%s', pid = %d, allocation size = %zu", | |
215 | (int) app->uid, app->name, (int) app->pid, | |
216 | entry->nr_counter_cpu_fds * sizeof(*cpu_counter_fds)); | |
217 | ret = -1; | |
218 | goto error_counter_cpu_fds_alloc; | |
219 | } | |
220 | ||
221 | /* Initialize to an invalid fd value to closes fds in case of error. */ | |
222 | for (i = 0; i < entry->nr_counter_cpu_fds; i++) { | |
223 | cpu_counter_fds[i] = -1; | |
224 | } | |
225 | ||
226 | cpu_counters = zmalloc(entry->nr_counter_cpu_fds * sizeof(**cpu_counters)); | |
227 | if (!cpu_counters) { | |
228 | PERROR("Failed to allocate event notifier error counter lttng_ust_abi_object_data array: application uid = %d, application name = '%s', pid = %d, allocation size = %zu", | |
229 | (int) app->uid, app->name, (int) app->pid, | |
230 | entry->nr_counter_cpu_fds * sizeof(**cpu_counters)); | |
231 | ret = -1; | |
232 | goto error_counter_cpus_alloc; | |
233 | } | |
234 | ||
235 | for (i = 0; i < entry->nr_counter_cpu_fds; i++) { | |
236 | cpu_counter_fds[i] = shm_create_anonymous("event-notifier-error-accounting"); | |
237 | if (cpu_counter_fds[i] == -1) { | |
238 | ERR("Failed to create event notifier error accounting shared memory for application user: application uid = %d, pid = %d, application name = '%s'", | |
239 | (int) app->uid, (int) app->pid, app->name); | |
240 | goto error_shm_alloc; | |
241 | } | |
242 | } | |
243 | ||
244 | /* | |
245 | * Ownership of the file descriptors transferred to the ustctl object. | |
246 | */ | |
247 | daemon_counter = ustctl_create_counter(1, &dimension, 0, -1, | |
248 | entry->nr_counter_cpu_fds, cpu_counter_fds, | |
249 | USTCTL_COUNTER_BITNESS_32, | |
250 | USTCTL_COUNTER_ARITHMETIC_MODULAR, | |
251 | USTCTL_COUNTER_ALLOC_PER_CPU, | |
252 | false); | |
253 | if (!daemon_counter) { | |
254 | goto error_create_daemon_counter; | |
255 | } | |
256 | ||
257 | ret = ustctl_create_counter_data(daemon_counter, &counter); | |
258 | if (ret) { | |
259 | ERR("Failed to create userspace tracer counter data for application user: uid = %d, pid = %d, application name = '%s'", | |
260 | (int) app->uid, (int) app->pid, app->name); | |
261 | goto error_create_counter_data; | |
262 | } | |
263 | ||
264 | for (i = 0; i < entry->nr_counter_cpu_fds; i++) { | |
265 | ret = ustctl_create_counter_cpu_data(daemon_counter, i, | |
266 | &cpu_counters[i]); | |
267 | if (ret) { | |
268 | ERR("Failed to create userspace tracer counter cpu data for application user: uid = %d, pid = %d, application name = '%s'", | |
269 | (int) app->uid, (int) app->pid, | |
270 | app->name); | |
271 | goto error_create_counter_cpu_data; | |
272 | } | |
273 | } | |
274 | ||
275 | entry->daemon_counter = daemon_counter; | |
276 | entry->counter = counter; | |
277 | entry->cpu_counters = cpu_counters; | |
278 | ||
279 | lttng_ht_node_init_u64(&entry->node, app->uid); | |
280 | lttng_ht_add_unique_u64(error_counter_uid_ht, &entry->node); | |
281 | ||
282 | goto end; | |
283 | ||
284 | error_create_counter_cpu_data: | |
285 | /* Teardown any allocated cpu counters. */ | |
286 | for (i = 0; i < entry->nr_counter_cpu_fds; i++) { | |
287 | if (!cpu_counters[i]) { | |
288 | /* | |
289 | * Early-exit when error occurred before all cpu | |
290 | * counters could be initialized. | |
291 | */ | |
292 | break; | |
293 | } | |
294 | ||
295 | ustctl_release_object(-1, cpu_counters[i]); | |
296 | free(cpu_counters[i]); | |
297 | } | |
298 | ||
299 | ustctl_release_object(-1, entry->counter); | |
300 | free(entry->counter); | |
301 | error_create_counter_data: | |
302 | ustctl_destroy_counter(daemon_counter); | |
303 | error_create_daemon_counter: | |
304 | error_shm_alloc: | |
305 | /* Error occured before per-cpu SHMs were handed-off to ustctl. */ | |
306 | if (cpu_counter_fds) { | |
307 | for (i = 0; i < entry->nr_counter_cpu_fds; i++) { | |
308 | if (cpu_counter_fds[i] < 0) { | |
309 | /* | |
310 | * Early-exit when error occurred before all cpu | |
311 | * counter shm fds could be initialized. | |
312 | */ | |
313 | break; | |
314 | } | |
315 | ||
316 | ret = close(cpu_counter_fds[i]); | |
317 | if (ret) { | |
318 | PERROR("Failed to close error counter per-CPU shm file descriptor: fd = %d", cpu_counter_fds[i]); | |
319 | } | |
320 | } | |
321 | } | |
322 | ||
323 | free(cpu_counters); | |
324 | error_counter_cpus_alloc: | |
325 | error_counter_cpu_fds_alloc: | |
326 | free(entry); | |
327 | error: | |
328 | entry = NULL; | |
329 | end: | |
330 | free(cpu_counter_fds); | |
331 | return entry; | |
332 | } | |
333 | ||
334 | static | |
335 | enum event_notifier_error_accounting_status send_counter_data_to_ust( | |
336 | struct ust_app *app, | |
337 | struct lttng_ust_abi_object_data *new_counter) | |
338 | { | |
339 | int ret; | |
340 | enum event_notifier_error_accounting_status status; | |
341 | ||
342 | /* Attach counter to trigger group. */ | |
343 | pthread_mutex_lock(&app->sock_lock); | |
344 | ret = ustctl_send_counter_data_to_ust(app->sock, | |
345 | app->event_notifier_group.object->handle, new_counter); | |
346 | pthread_mutex_unlock(&app->sock_lock); | |
347 | if (ret < 0) { | |
348 | if (ret != -EPIPE && ret != -LTTNG_UST_ERR_EXITING) { | |
349 | ERR("Failed to send counter data to application: application name = '%s', pid = %d, ret = %d", | |
350 | app->name, app->pid, ret); | |
351 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; | |
352 | } else { | |
353 | DBG3("Failed to send counter data to application (application is dead): application name = '%s', pid = %d, ret = %d", | |
354 | app->name, app->pid, ret); | |
355 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_APP_DEAD; | |
356 | } | |
357 | ||
358 | goto end; | |
359 | } | |
360 | ||
361 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; | |
362 | end: | |
363 | return status; | |
364 | } | |
365 | ||
366 | static | |
367 | enum event_notifier_error_accounting_status send_counter_cpu_data_to_ust( | |
368 | struct ust_app *app, | |
369 | struct lttng_ust_abi_object_data *counter, | |
370 | struct lttng_ust_abi_object_data *counter_cpu) | |
371 | { | |
372 | int ret; | |
373 | enum event_notifier_error_accounting_status status; | |
374 | ||
375 | pthread_mutex_lock(&app->sock_lock); | |
376 | ret = ustctl_send_counter_cpu_data_to_ust(app->sock, | |
377 | counter, counter_cpu); | |
378 | pthread_mutex_unlock(&app->sock_lock); | |
379 | if (ret < 0) { | |
380 | if (ret != -EPIPE && ret != -LTTNG_UST_ERR_EXITING) { | |
381 | ERR("Failed to send counter CPU data to application: application name = '%s', pid = %d, ret = %d", | |
382 | app->name, app->pid, ret); | |
383 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; | |
384 | } else { | |
385 | DBG3("Failed to send counter CPU data to application: application name = '%s', pid = %d, ret = %d", | |
386 | app->name, app->pid, ret); | |
387 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_APP_DEAD; | |
388 | } | |
389 | ||
390 | goto end; | |
391 | } | |
392 | ||
393 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; | |
394 | end: | |
395 | return status; | |
396 | } | |
397 | ||
398 | enum event_notifier_error_accounting_status | |
399 | event_notifier_error_accounting_register_app(struct ust_app *app) | |
400 | { | |
401 | int ret; | |
402 | uint64_t i; | |
403 | struct lttng_ust_abi_object_data *new_counter; | |
404 | struct error_account_entry *entry; | |
405 | enum event_notifier_error_accounting_status status; | |
406 | struct lttng_ust_abi_object_data **cpu_counters; | |
407 | ||
408 | /* | |
409 | * Check if we already have a error counter for the user id of this | |
410 | * app. If not, create one. | |
411 | */ | |
412 | rcu_read_lock(); | |
413 | entry = get_uid_accounting_entry(app); | |
414 | if (entry == NULL) { | |
415 | entry = create_uid_accounting_entry(app); | |
416 | if (!entry) { | |
417 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; | |
418 | goto end; | |
419 | } | |
420 | } | |
421 | ||
422 | /* Duplicate counter object data. */ | |
423 | ret = ustctl_duplicate_ust_object_data(&new_counter, | |
424 | entry->counter); | |
425 | if (ret) { | |
426 | ERR("Failed to duplicate event notifier error accounting counter for application user: application uid = %d, pid = %d, application name = '%s'", | |
427 | (int) app->uid, (int) app->pid, app->name); | |
428 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; | |
429 | goto end; | |
430 | } | |
431 | ||
432 | status = send_counter_data_to_ust(app, new_counter); | |
433 | if (status != EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK) { | |
434 | ERR("Failed to send counter data to application tracer: status = %s, application uid = %d, pid = %d, application name = '%s'", | |
435 | error_accounting_status_str(status), | |
436 | (int) app->uid, (int) app->pid, app->name); | |
437 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; | |
438 | goto error_send_counter_data; | |
439 | } | |
440 | ||
441 | cpu_counters = zmalloc(entry->nr_counter_cpu_fds * sizeof(struct lttng_ust_abi_object_data)); | |
442 | if (!cpu_counters) { | |
443 | PERROR("Failed to allocate event notifier error counter lttng_ust_abi_object_data array: application uid = %d, application name = '%s', pid = %d, allocation size = %zu", | |
444 | (int) app->uid, app->name, (int) app->pid, | |
445 | entry->nr_counter_cpu_fds * sizeof(**cpu_counters)); | |
446 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NOMEM; | |
447 | goto error_allocate_cpu_counters; | |
448 | } | |
449 | ||
450 | for (i = 0; i < entry->nr_counter_cpu_fds; i++) { | |
451 | struct lttng_ust_abi_object_data *new_counter_cpu = NULL; | |
452 | ||
453 | ret = ustctl_duplicate_ust_object_data(&new_counter_cpu, | |
454 | entry->cpu_counters[i]); | |
455 | if (ret) { | |
456 | ERR("Failed to duplicate userspace tracer counter cpu data for application user: uid = %d, pid = %d, application name = '%s'", | |
457 | (int) app->uid, (int) app->pid, | |
458 | app->name); | |
459 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NOMEM; | |
460 | goto error_duplicate_cpu_counter; | |
461 | } | |
462 | ||
463 | cpu_counters[i] = new_counter_cpu; | |
464 | ||
465 | status = send_counter_cpu_data_to_ust(app, new_counter, | |
466 | new_counter_cpu); | |
467 | if (status != EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK) { | |
468 | ERR("Failed to send counter cpu data to application tracer: status = %s, application uid = %d, pid = %d, application name = '%s'", | |
469 | error_accounting_status_str(status), | |
470 | (int) app->uid, (int) app->pid, | |
471 | app->name); | |
472 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; | |
473 | goto error_send_cpu_counter_data; | |
474 | } | |
475 | } | |
476 | ||
477 | app->event_notifier_group.counter = new_counter; | |
478 | new_counter = NULL; | |
479 | app->event_notifier_group.nr_counter_cpu = entry->nr_counter_cpu_fds; | |
480 | app->event_notifier_group.counter_cpu = cpu_counters; | |
481 | cpu_counters = NULL; | |
482 | goto end; | |
483 | ||
484 | error_allocate_cpu_counters: | |
485 | error_send_cpu_counter_data: | |
486 | error_duplicate_cpu_counter: | |
487 | /* Teardown any duplicated cpu counters. */ | |
488 | for (i = 0; i < entry->nr_counter_cpu_fds; i++) { | |
489 | if (!cpu_counters[i]) { | |
490 | /* | |
491 | * Early-exit when error occurred before all cpu | |
492 | * counters could be initialized. | |
493 | */ | |
494 | break; | |
495 | } | |
496 | ||
497 | ustctl_release_object(-1, cpu_counters[i]); | |
498 | free(cpu_counters[i]); | |
499 | } | |
500 | ||
501 | error_send_counter_data: | |
502 | ustctl_release_object(-1, new_counter); | |
503 | free(new_counter); | |
504 | end: | |
505 | rcu_read_unlock(); | |
506 | return status; | |
507 | } | |
508 | ||
509 | enum event_notifier_error_accounting_status | |
510 | event_notifier_error_accounting_unregister_app(struct ust_app *app) | |
511 | { | |
512 | enum event_notifier_error_accounting_status status; | |
513 | struct error_account_entry *entry; | |
514 | int i; | |
515 | ||
516 | rcu_read_lock(); | |
517 | entry = get_uid_accounting_entry(app); | |
518 | if (entry == NULL) { | |
519 | ERR("Failed to find event notitifier error accounting entry on application teardown: pid = %d, application name = '%s'", | |
520 | app->pid, app->name); | |
521 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; | |
522 | goto end; | |
523 | } | |
524 | ||
525 | for (i = 0; i < app->event_notifier_group.nr_counter_cpu; i++) { | |
526 | ustctl_release_object(app->sock, | |
527 | app->event_notifier_group.counter_cpu[i]); | |
528 | free(app->event_notifier_group.counter_cpu[i]); | |
529 | } | |
530 | ||
531 | free(app->event_notifier_group.counter_cpu); | |
532 | ||
533 | ustctl_release_object(app->sock, app->event_notifier_group.counter); | |
534 | free(app->event_notifier_group.counter); | |
535 | ||
536 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; | |
537 | end: | |
538 | rcu_read_unlock(); | |
539 | return status; | |
540 | } | |
541 | ||
542 | static | |
543 | enum event_notifier_error_accounting_status | |
544 | event_notifier_error_accounting_ust_get_count( | |
545 | const struct lttng_trigger *trigger, uint64_t *count) | |
546 | { | |
547 | struct lttng_ht_iter iter; | |
548 | struct error_account_entry *uid_entry; | |
549 | uint64_t error_counter_index, global_sum = 0; | |
550 | enum event_notifier_error_accounting_status status; | |
551 | size_t dimension_indexes[1]; | |
552 | const uint64_t tracer_token = lttng_trigger_get_tracer_token(trigger); | |
553 | ||
554 | /* | |
555 | * Go over all error counters (ignoring uid) as a trigger (and trigger | |
556 | * errors) can be generated from any applications that this session | |
557 | * daemon is managing. | |
558 | */ | |
559 | ||
560 | rcu_read_lock(); | |
561 | ||
562 | status = get_error_counter_index_for_token( | |
563 | tracer_token, | |
564 | &error_counter_index); | |
565 | if (status != EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK) { | |
566 | uid_t trigger_owner_uid; | |
567 | const char *trigger_name; | |
568 | ||
569 | get_trigger_info_for_log(trigger, &trigger_name, | |
570 | &trigger_owner_uid); | |
571 | ||
572 | ERR("Failed to retrieve index for tracer token: token = %" PRIu64 ", trigger name = '%s', trigger owner uid = %d, status = %s", | |
573 | tracer_token, trigger_name, | |
574 | (int) trigger_owner_uid, | |
575 | error_accounting_status_str(status)); | |
576 | goto end; | |
577 | } | |
578 | ||
579 | dimension_indexes[0] = error_counter_index; | |
580 | ||
581 | cds_lfht_for_each_entry(error_counter_uid_ht->ht, &iter.iter, | |
582 | uid_entry, node.node) { | |
583 | int ret; | |
584 | int64_t local_value = 0; | |
585 | bool overflow = false, underflow = false; | |
586 | ||
587 | ret = ustctl_counter_aggregate(uid_entry->daemon_counter, | |
588 | dimension_indexes, &local_value, &overflow, | |
589 | &underflow); | |
590 | if (ret || local_value < 0) { | |
591 | uid_t trigger_owner_uid; | |
592 | const char *trigger_name; | |
593 | ||
594 | get_trigger_info_for_log(trigger, &trigger_name, | |
595 | &trigger_owner_uid); | |
596 | ||
597 | if (ret) { | |
598 | ERR("Failed to aggregate event notifier error counter values of trigger: trigger name = '%s', trigger owner uid = %d", | |
599 | trigger_name, | |
600 | (int) trigger_owner_uid); | |
601 | } else if (local_value < 0) { | |
602 | ERR("Negative event notifier error counter value encountered during aggregation: trigger name = '%s', trigger owner uid = %d, value = %" PRId64, | |
603 | trigger_name, | |
604 | (int) trigger_owner_uid, | |
605 | local_value); | |
606 | } else { | |
607 | abort(); | |
608 | } | |
609 | ||
610 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; | |
611 | goto end; | |
612 | } | |
613 | ||
614 | /* Cast is safe as negative values are checked-for above. */ | |
615 | global_sum += (uint64_t) local_value; | |
616 | ||
617 | } | |
618 | ||
619 | *count = global_sum; | |
620 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; | |
621 | ||
622 | end: | |
623 | rcu_read_unlock(); | |
624 | return status; | |
625 | } | |
626 | ||
627 | static | |
628 | enum event_notifier_error_accounting_status event_notifier_error_accounting_ust_clear( | |
629 | const struct lttng_trigger *trigger) | |
630 | { | |
631 | struct lttng_ht_iter iter; | |
632 | struct error_account_entry *uid_entry; | |
633 | uint64_t error_counter_index; | |
634 | enum event_notifier_error_accounting_status status; | |
635 | size_t dimension_index; | |
636 | const uint64_t tracer_token = lttng_trigger_get_tracer_token(trigger); | |
637 | ||
638 | /* | |
639 | * Go over all error counters (ignoring uid) as a trigger (and trigger | |
640 | * errors) can be generated from any applications that this session | |
641 | * daemon is managing. | |
642 | */ | |
643 | ||
644 | rcu_read_lock(); | |
645 | status = get_error_counter_index_for_token( | |
646 | tracer_token, | |
647 | &error_counter_index); | |
648 | if (status != EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK) { | |
649 | uid_t trigger_owner_uid; | |
650 | const char *trigger_name; | |
651 | ||
652 | get_trigger_info_for_log(trigger, &trigger_name, | |
653 | &trigger_owner_uid); | |
654 | ||
655 | ERR("Failed to retrieve index for tracer token: token = %" PRIu64 ", trigger name = '%s', trigger owner uid = %d, status = %s", | |
656 | tracer_token, trigger_name, | |
657 | (int) trigger_owner_uid, | |
658 | error_accounting_status_str(status)); | |
659 | goto end; | |
660 | } | |
661 | ||
662 | dimension_index = error_counter_index; | |
663 | ||
664 | cds_lfht_for_each_entry(error_counter_uid_ht->ht, &iter.iter, | |
665 | uid_entry, node.node) { | |
666 | const int ret = ustctl_counter_clear(uid_entry->daemon_counter, | |
667 | &dimension_index); | |
668 | ||
669 | if (ret) { | |
670 | uid_t trigger_owner_uid; | |
671 | const char *trigger_name; | |
672 | ||
673 | get_trigger_info_for_log(trigger, &trigger_name, | |
674 | &trigger_owner_uid); | |
675 | ERR("Failed to clear event notifier counter value for trigger: counter uid = %d, trigger name = '%s', trigger owner uid = %d", | |
676 | (int) uid_entry->node.key, trigger_name, | |
677 | (int) trigger_owner_uid); | |
678 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; | |
679 | goto end; | |
680 | } | |
681 | } | |
682 | ||
683 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; | |
684 | end: | |
685 | rcu_read_unlock(); | |
686 | return status; | |
687 | } | |
688 | #endif /* HAVE_LIBLTTNG_UST_CTL */ | |
689 | ||
90aa04a1 FD |
690 | static |
691 | enum event_notifier_error_accounting_status | |
692 | event_notifier_error_accounting_kernel_clear( | |
693 | const struct lttng_trigger *trigger) | |
694 | { | |
695 | int ret; | |
696 | uint64_t error_counter_index; | |
697 | enum event_notifier_error_accounting_status status; | |
698 | struct lttng_kernel_counter_clear counter_clear = {}; | |
699 | ||
700 | status = get_error_counter_index_for_token( | |
701 | lttng_trigger_get_tracer_token(trigger), | |
702 | &error_counter_index); | |
703 | if (status != EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK) { | |
704 | uid_t trigger_owner_uid; | |
705 | const char *trigger_name; | |
90aa04a1 | 706 | |
533a90fb FD |
707 | get_trigger_info_for_log( |
708 | trigger, &trigger_name, &trigger_owner_uid); | |
709 | ||
710 | ERR("Failed to get event notifier error counter index: trigger owner uid = %d, trigger name = '%s', status = '%s'", | |
711 | trigger_owner_uid, trigger_name, | |
712 | error_accounting_status_str(status)); | |
90aa04a1 FD |
713 | goto end; |
714 | } | |
715 | ||
716 | counter_clear.index.number_dimensions = 1; | |
717 | counter_clear.index.dimension_indexes[0] = error_counter_index; | |
718 | ||
719 | ret = kernctl_counter_clear( | |
720 | kernel_error_accountant.kernel_event_notifier_error_counter_fd, | |
721 | &counter_clear); | |
722 | if (ret) { | |
533a90fb FD |
723 | uid_t trigger_owner_uid; |
724 | const char *trigger_name; | |
725 | ||
726 | get_trigger_info_for_log( | |
727 | trigger, &trigger_name, &trigger_owner_uid); | |
728 | ||
729 | ERR("Failed to clear kernel event notifier error counter: trigger owner uid = %d, trigger name = '%s'", | |
730 | trigger_owner_uid, trigger_name); | |
90aa04a1 FD |
731 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; |
732 | goto end; | |
733 | } | |
734 | ||
735 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; | |
736 | end: | |
737 | return status; | |
738 | } | |
739 | ||
740 | enum event_notifier_error_accounting_status | |
741 | event_notifier_error_accounting_register_kernel( | |
742 | int kernel_event_notifier_group_fd) | |
743 | { | |
744 | int error_counter_fd = -1, ret; | |
745 | enum event_notifier_error_accounting_status status; | |
746 | const struct lttng_kernel_counter_conf error_counter_conf = { | |
747 | .arithmetic = LTTNG_KERNEL_COUNTER_ARITHMETIC_MODULAR, | |
748 | .bitness = sizeof(void *) == sizeof(uint32_t) ? | |
749 | LTTNG_KERNEL_COUNTER_BITNESS_32 : | |
750 | LTTNG_KERNEL_COUNTER_BITNESS_64, | |
751 | .global_sum_step = 0, | |
752 | .number_dimensions = 1, | |
753 | .dimensions[0].size = error_counter_size, | |
754 | .dimensions[0].has_underflow = false, | |
755 | .dimensions[0].has_overflow = false, | |
756 | }; | |
757 | ||
758 | ret = kernctl_create_event_notifier_group_error_counter( | |
759 | kernel_event_notifier_group_fd, &error_counter_conf); | |
760 | if (ret < 0) { | |
761 | PERROR("Failed to create event notifier group error counter through kernel ioctl: kernel_event_notifier_group_fd = %d", | |
762 | kernel_event_notifier_group_fd); | |
763 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; | |
764 | goto error; | |
765 | } | |
766 | ||
767 | error_counter_fd = ret; | |
768 | ||
769 | /* Prevent fd duplication after execlp(). */ | |
770 | ret = fcntl(error_counter_fd, F_SETFD, FD_CLOEXEC); | |
771 | if (ret < 0) { | |
772 | PERROR("Failed to set FD_CLOEXEC flag on event notifier error counter file descriptor: error_counter_fd = %d", | |
773 | error_counter_fd); | |
774 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; | |
775 | goto error; | |
776 | } | |
777 | ||
778 | DBG("Created kernel event notifier group error counter: fd = %d", | |
779 | error_counter_fd); | |
780 | ||
781 | kernel_error_accountant.kernel_event_notifier_error_counter_fd = | |
782 | error_counter_fd; | |
783 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; | |
784 | ||
785 | error: | |
786 | return status; | |
787 | } | |
788 | ||
789 | static | |
790 | enum event_notifier_error_accounting_status create_error_counter_index_for_token( | |
791 | uint64_t tracer_token, uint64_t *error_counter_index) | |
792 | { | |
793 | struct index_ht_entry *index_entry; | |
794 | enum lttng_index_allocator_status index_alloc_status; | |
795 | uint64_t local_error_counter_index; | |
796 | enum event_notifier_error_accounting_status status; | |
797 | ||
798 | /* Allocate a new index for that counter. */ | |
799 | index_alloc_status = lttng_index_allocator_alloc(index_allocator, | |
800 | &local_error_counter_index); | |
801 | switch (index_alloc_status) { | |
802 | case LTTNG_INDEX_ALLOCATOR_STATUS_EMPTY: | |
803 | DBG("No indices left in the configured event notifier error counter: " | |
804 | "number-of-indices = %"PRIu64, | |
805 | lttng_index_allocator_get_index_count( | |
806 | index_allocator)); | |
807 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NO_INDEX_AVAILABLE; | |
808 | goto end; | |
809 | case LTTNG_INDEX_ALLOCATOR_STATUS_OK: | |
810 | break; | |
811 | default: | |
812 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; | |
813 | goto end; | |
814 | } | |
815 | ||
816 | index_entry = zmalloc(sizeof(*index_entry)); | |
817 | if (index_entry == NULL) { | |
818 | PERROR("Failed to allocate event notifier error counter hash table entry"); | |
819 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NOMEM; | |
820 | goto end; | |
821 | } | |
822 | ||
823 | index_entry->error_counter_index = local_error_counter_index; | |
824 | lttng_ht_node_init_u64(&index_entry->node, tracer_token); | |
825 | lttng_ht_add_unique_u64(error_counter_indexes_ht, &index_entry->node); | |
826 | ||
827 | DBG("Allocated error counter index for tracer token: tracer token = %" PRIu64 ", index = %" PRIu64, | |
828 | tracer_token, local_error_counter_index); | |
829 | *error_counter_index = local_error_counter_index; | |
830 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; | |
831 | end: | |
832 | return status; | |
833 | } | |
834 | ||
835 | enum event_notifier_error_accounting_status | |
836 | event_notifier_error_accounting_register_event_notifier( | |
837 | const struct lttng_trigger *trigger, | |
838 | uint64_t *error_counter_index) | |
839 | { | |
840 | enum event_notifier_error_accounting_status status; | |
841 | uint64_t local_error_counter_index; | |
842 | ||
843 | /* | |
844 | * Check if this event notifier already has a error counter index | |
845 | * assigned. | |
846 | */ | |
847 | status = get_error_counter_index_for_token( | |
848 | lttng_trigger_get_tracer_token(trigger), | |
849 | &local_error_counter_index); | |
850 | switch (status) { | |
851 | case EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NOT_FOUND: | |
852 | { | |
853 | uid_t trigger_owner_uid; | |
854 | const char *trigger_name; | |
90aa04a1 | 855 | |
533a90fb FD |
856 | get_trigger_info_for_log( |
857 | trigger, &trigger_name, &trigger_owner_uid); | |
858 | ||
859 | DBG("Event notifier error counter index not found for tracer token (allocating a new one): trigger name = '%s', trigger owner uid = %d, tracer token = %" PRIu64, | |
860 | trigger_name, trigger_owner_uid, | |
90aa04a1 | 861 | lttng_trigger_get_tracer_token(trigger)); |
533a90fb | 862 | |
90aa04a1 FD |
863 | status = create_error_counter_index_for_token( |
864 | lttng_trigger_get_tracer_token(trigger), | |
865 | &local_error_counter_index); | |
866 | if (status != EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK) { | |
533a90fb FD |
867 | ERR("Error creating index for token: status = %s, trigger name = '%s', trigger owner uid = %d", |
868 | error_accounting_status_str(status), | |
869 | trigger_name, trigger_owner_uid); | |
90aa04a1 FD |
870 | goto end; |
871 | } | |
872 | /* fall-through. */ | |
873 | } | |
874 | case EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK: | |
875 | *error_counter_index = local_error_counter_index; | |
876 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; | |
877 | break; | |
878 | default: | |
879 | break; | |
880 | } | |
881 | ||
882 | end: | |
883 | return status; | |
884 | } | |
885 | ||
886 | static | |
887 | enum event_notifier_error_accounting_status | |
888 | event_notifier_error_accounting_kernel_get_count( | |
889 | const struct lttng_trigger *trigger, uint64_t *count) | |
890 | { | |
891 | struct lttng_kernel_counter_aggregate counter_aggregate = {}; | |
892 | enum event_notifier_error_accounting_status status; | |
893 | uint64_t error_counter_index; | |
894 | int ret; | |
895 | ||
896 | status = get_error_counter_index_for_token( | |
897 | lttng_trigger_get_tracer_token(trigger), &error_counter_index); | |
898 | if (status != EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK) { | |
533a90fb FD |
899 | ERR("Error getting index for token: status=%s", |
900 | error_accounting_status_str(status)); | |
90aa04a1 FD |
901 | goto end; |
902 | } | |
903 | ||
904 | counter_aggregate.index.number_dimensions = 1; | |
905 | counter_aggregate.index.dimension_indexes[0] = error_counter_index; | |
906 | ||
907 | assert(kernel_error_accountant.kernel_event_notifier_error_counter_fd); | |
908 | ||
909 | ret = kernctl_counter_get_aggregate_value( | |
910 | kernel_error_accountant.kernel_event_notifier_error_counter_fd, | |
911 | &counter_aggregate); | |
912 | if (ret || counter_aggregate.value.value < 0) { | |
913 | uid_t trigger_owner_uid; | |
914 | const char *trigger_name; | |
533a90fb FD |
915 | |
916 | get_trigger_info_for_log(trigger, &trigger_name, | |
917 | &trigger_owner_uid); | |
90aa04a1 FD |
918 | |
919 | if (counter_aggregate.value.value < 0) { | |
920 | ERR("Invalid negative event notifier error counter value: trigger owner = %d, trigger name = '%s', value = %" PRId64, | |
921 | trigger_owner_uid, trigger_name, | |
922 | counter_aggregate.value.value); | |
923 | } else { | |
924 | ERR("Failed to getting event notifier error count: trigger owner = %d, trigger name = '%s', ret = %d", | |
925 | trigger_owner_uid, trigger_name, ret); | |
926 | } | |
927 | ||
928 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; | |
929 | goto end; | |
930 | } | |
931 | ||
932 | /* Error count can't be negative. */ | |
933 | assert(counter_aggregate.value.value >= 0); | |
934 | *count = (uint64_t) counter_aggregate.value.value; | |
935 | ||
936 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; | |
937 | ||
938 | end: | |
939 | return status; | |
940 | } | |
941 | ||
942 | enum event_notifier_error_accounting_status | |
943 | event_notifier_error_accounting_get_count( | |
944 | const struct lttng_trigger *trigger, uint64_t *count) | |
945 | { | |
946 | switch (lttng_trigger_get_underlying_domain_type_restriction(trigger)) { | |
947 | case LTTNG_DOMAIN_KERNEL: | |
948 | return event_notifier_error_accounting_kernel_get_count( | |
949 | trigger, count); | |
950 | case LTTNG_DOMAIN_UST: | |
533a90fb FD |
951 | #ifdef HAVE_LIBLTTNG_UST_CTL |
952 | return event_notifier_error_accounting_ust_get_count(trigger, count); | |
953 | #else | |
90aa04a1 | 954 | return EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; |
533a90fb | 955 | #endif /* HAVE_LIBLTTNG_UST_CTL */ |
90aa04a1 FD |
956 | default: |
957 | abort(); | |
958 | } | |
959 | } | |
960 | ||
961 | static | |
962 | enum event_notifier_error_accounting_status | |
963 | event_notifier_error_accounting_clear(const struct lttng_trigger *trigger) | |
964 | { | |
965 | switch (lttng_trigger_get_underlying_domain_type_restriction(trigger)) { | |
966 | case LTTNG_DOMAIN_KERNEL: | |
967 | return event_notifier_error_accounting_kernel_clear(trigger); | |
968 | case LTTNG_DOMAIN_UST: | |
533a90fb FD |
969 | #ifdef HAVE_LIBLTTNG_UST_CTL |
970 | return event_notifier_error_accounting_ust_clear(trigger); | |
971 | #else | |
90aa04a1 | 972 | return EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; |
533a90fb | 973 | #endif /* HAVE_LIBLTTNG_UST_CTL */ |
90aa04a1 FD |
974 | default: |
975 | abort(); | |
976 | } | |
977 | } | |
978 | ||
979 | static void free_index_ht_entry(struct rcu_head *head) | |
980 | { | |
981 | struct index_ht_entry *entry = caa_container_of(head, | |
982 | struct index_ht_entry, rcu_head); | |
983 | ||
984 | free(entry); | |
985 | } | |
986 | ||
987 | void event_notifier_error_accounting_unregister_event_notifier( | |
988 | const struct lttng_trigger *trigger) | |
989 | { | |
990 | struct lttng_ht_iter iter; | |
991 | struct lttng_ht_node_u64 *node; | |
533a90fb | 992 | const uint64_t tracer_token = lttng_trigger_get_tracer_token(trigger); |
90aa04a1 | 993 | enum event_notifier_error_accounting_status status; |
90aa04a1 FD |
994 | |
995 | status = event_notifier_error_accounting_clear(trigger); | |
996 | if (status != EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK) { | |
533a90fb FD |
997 | /* Trigger details already logged by callee on error. */ |
998 | ERR("Failed to clear event notifier error counter during unregistration of event notifier: status = '%s'", | |
999 | error_accounting_status_str(status)); | |
90aa04a1 FD |
1000 | } |
1001 | ||
1002 | rcu_read_lock(); | |
1003 | lttng_ht_lookup(error_counter_indexes_ht, &tracer_token, &iter); | |
1004 | node = lttng_ht_iter_get_node_u64(&iter); | |
533a90fb FD |
1005 | if (node) { |
1006 | struct index_ht_entry *index_entry = caa_container_of( | |
1007 | node, typeof(*index_entry), node); | |
1008 | enum lttng_index_allocator_status index_alloc_status; | |
1009 | ||
90aa04a1 FD |
1010 | index_alloc_status = lttng_index_allocator_release( |
1011 | index_allocator, | |
1012 | index_entry->error_counter_index); | |
1013 | if (index_alloc_status != LTTNG_INDEX_ALLOCATOR_STATUS_OK) { | |
533a90fb FD |
1014 | uid_t trigger_owner_uid; |
1015 | const char *trigger_name; | |
1016 | ||
1017 | get_trigger_info_for_log(trigger, &trigger_name, | |
1018 | &trigger_owner_uid); | |
1019 | ||
1020 | ERR("Failed to release event notifier error counter index: index = %" PRIu64 ", trigger name = '%s', trigger owner uid = %d", | |
1021 | index_entry->error_counter_index, | |
1022 | trigger_name, (int) trigger_owner_uid); | |
1023 | /* Don't exit, perform the rest of the clean-up. */ | |
90aa04a1 FD |
1024 | } |
1025 | ||
1026 | lttng_ht_del(error_counter_indexes_ht, &iter); | |
1027 | call_rcu(&index_entry->rcu_head, free_index_ht_entry); | |
1028 | } | |
1029 | ||
1030 | rcu_read_unlock(); | |
1031 | } | |
1032 | ||
533a90fb FD |
1033 | #ifdef HAVE_LIBLTTNG_UST_CTL |
1034 | static void free_error_account_entry(struct rcu_head *head) | |
1035 | { | |
1036 | int i; | |
1037 | struct error_account_entry *entry = | |
1038 | caa_container_of(head, typeof(*entry), rcu_head); | |
1039 | ||
1040 | for (i = 0; i < entry->nr_counter_cpu_fds; i++) { | |
1041 | ustctl_release_object(-1, entry->cpu_counters[i]); | |
1042 | free(entry->cpu_counters[i]); | |
1043 | } | |
1044 | ||
1045 | free(entry->cpu_counters); | |
1046 | ||
1047 | ustctl_release_object(-1, entry->counter); | |
1048 | free(entry->counter); | |
1049 | ||
1050 | ustctl_destroy_counter(entry->daemon_counter); | |
1051 | ||
1052 | free(entry); | |
1053 | } | |
1054 | #else | |
1055 | /* Not called without UST support. */ | |
1056 | static void free_error_account_entry(struct rcu_head *head) {} | |
1057 | #endif /* HAVE_LIBLTTNG_UST_CTL */ | |
1058 | ||
90aa04a1 FD |
1059 | void event_notifier_error_accounting_fini(void) |
1060 | { | |
533a90fb FD |
1061 | struct lttng_ht_iter iter; |
1062 | struct error_account_entry *uid_entry; | |
1063 | ||
90aa04a1 FD |
1064 | lttng_index_allocator_destroy(index_allocator); |
1065 | ||
1066 | if (kernel_error_accountant.kernel_event_notifier_error_counter_fd) { | |
1067 | const int ret = close(kernel_error_accountant.kernel_event_notifier_error_counter_fd); | |
1068 | ||
1069 | if (ret) { | |
1070 | PERROR("Failed to close kernel event notifier error counter"); | |
1071 | } | |
1072 | } | |
1073 | ||
1074 | /* | |
533a90fb FD |
1075 | * FIXME error account entries are not reference-counted and torn |
1076 | * down on last use. They exist from the moment of their first use | |
1077 | * up until the teardown of the session daemon. | |
1078 | */ | |
1079 | rcu_read_lock(); | |
1080 | cds_lfht_for_each_entry(error_counter_uid_ht->ht, &iter.iter, | |
1081 | uid_entry, node.node) { | |
1082 | cds_lfht_del(error_counter_uid_ht->ht, &uid_entry->node.node); | |
1083 | call_rcu(&uid_entry->rcu_head, free_error_account_entry); | |
1084 | } | |
1085 | rcu_read_unlock(); | |
1086 | lttng_ht_destroy(error_counter_uid_ht); | |
1087 | ||
1088 | /* | |
1089 | * Will assert if some error counter indices were not released (an | |
1090 | * internal error). | |
90aa04a1 FD |
1091 | */ |
1092 | lttng_ht_destroy(error_counter_indexes_ht); | |
1093 | } |