Commit | Line | Data |
---|---|---|
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 | ||
761ffce2 FD |
34 | struct ust_error_accounting_entry { |
35 | uid_t uid; | |
533a90fb FD |
36 | struct lttng_ht_node_u64 node; |
37 | struct rcu_head rcu_head; | |
38 | struct ustctl_daemon_counter *daemon_counter; | |
39 | /* | |
40 | * Those `lttng_ust_abi_object_data` are anonymous handles to the counters | |
41 | * objects. | |
42 | * They are only used to be duplicated for each new applications of the | |
43 | * user. To destroy them, call with the `sock` parameter set to -1. | |
44 | * e.g. `ustctl_release_object(-1, data)`; | |
45 | */ | |
46 | struct lttng_ust_abi_object_data *counter; | |
47 | struct lttng_ust_abi_object_data **cpu_counters; | |
48 | int nr_counter_cpu_fds; | |
49 | }; | |
50 | ||
761ffce2 | 51 | struct kernel_error_accounting_entry { |
90aa04a1 FD |
52 | int kernel_event_notifier_error_counter_fd; |
53 | }; | |
54 | ||
761ffce2 | 55 | static struct kernel_error_accounting_entry kernel_error_accountant; |
90aa04a1 | 56 | |
533a90fb FD |
57 | /* Hashtable mapping uid to error_account_entry. */ |
58 | static struct lttng_ht *error_counter_uid_ht; | |
59 | ||
761ffce2 FD |
60 | struct error_accounting_state { |
61 | struct lttng_index_allocator *index_allocator; | |
62 | /* Hashtable mapping event notifier token to index_ht_entry. */ | |
63 | struct lttng_ht *indices_ht; | |
64 | uint64_t number_indices; | |
65 | }; | |
66 | ||
67 | static struct error_accounting_state ust_state; | |
68 | static struct error_accounting_state kernel_state; | |
90aa04a1 | 69 | |
533a90fb FD |
70 | static inline void get_trigger_info_for_log(const struct lttng_trigger *trigger, |
71 | const char **trigger_name, | |
72 | uid_t *trigger_owner_uid) | |
73 | { | |
74 | enum lttng_trigger_status trigger_status; | |
75 | ||
76 | trigger_status = lttng_trigger_get_name(trigger, trigger_name); | |
77 | switch (trigger_status) { | |
78 | case LTTNG_TRIGGER_STATUS_OK: | |
79 | break; | |
80 | case LTTNG_TRIGGER_STATUS_UNSET: | |
81 | *trigger_name = "(unset)"; | |
82 | break; | |
83 | default: | |
84 | abort(); | |
85 | } | |
86 | ||
87 | trigger_status = lttng_trigger_get_owner_uid(trigger, | |
88 | trigger_owner_uid); | |
89 | assert(trigger_status == LTTNG_TRIGGER_STATUS_OK); | |
90 | } | |
91 | ||
90aa04a1 FD |
92 | static inline |
93 | const char *error_accounting_status_str( | |
94 | enum event_notifier_error_accounting_status status) | |
95 | { | |
96 | switch (status) { | |
97 | case EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK: | |
98 | return "OK"; | |
99 | case EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR: | |
100 | return "ERROR"; | |
101 | case EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NOT_FOUND: | |
102 | return "NOT_FOUND"; | |
103 | case EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NOMEM: | |
104 | return "NOMEM"; | |
105 | case EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NO_INDEX_AVAILABLE: | |
106 | return "NO_INDEX_AVAILABLE"; | |
533a90fb FD |
107 | case EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_APP_DEAD: |
108 | return "APP_DEAD"; | |
90aa04a1 FD |
109 | default: |
110 | abort(); | |
111 | } | |
112 | } | |
113 | ||
761ffce2 | 114 | static |
90aa04a1 | 115 | enum event_notifier_error_accounting_status |
761ffce2 FD |
116 | init_error_accounting_state(struct error_accounting_state *state, |
117 | uint64_t index_count) | |
90aa04a1 FD |
118 | { |
119 | enum event_notifier_error_accounting_status status; | |
120 | ||
761ffce2 FD |
121 | assert(state); |
122 | ||
123 | state->number_indices = index_count; | |
124 | ||
125 | state->index_allocator = lttng_index_allocator_create(index_count); | |
126 | if (!state->index_allocator) { | |
127 | ERR("Failed to allocate event notifier error counter index allocator"); | |
90aa04a1 | 128 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NOMEM; |
761ffce2 | 129 | goto end; |
90aa04a1 FD |
130 | } |
131 | ||
761ffce2 FD |
132 | state->indices_ht = lttng_ht_new(ERROR_COUNTER_INDEX_HT_INITIAL_SIZE, |
133 | LTTNG_HT_TYPE_U64); | |
134 | if (!state->indices_ht) { | |
533a90fb FD |
135 | ERR("Failed to allocate error counter indices hash table"); |
136 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NOMEM; | |
761ffce2 FD |
137 | goto error_indices_ht; |
138 | } | |
139 | ||
140 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; | |
141 | goto end; | |
142 | ||
143 | error_indices_ht: | |
144 | lttng_index_allocator_destroy(state->index_allocator); | |
145 | state->index_allocator = NULL; | |
146 | end: | |
147 | return status; | |
148 | } | |
149 | ||
150 | static | |
151 | void fini_error_accounting_state(struct error_accounting_state *state) | |
152 | { | |
153 | assert(state); | |
154 | ||
155 | /* | |
156 | * Will assert if some error counter indices were not released (an | |
157 | * internal error). | |
158 | */ | |
159 | lttng_ht_destroy(state->indices_ht); | |
160 | lttng_index_allocator_destroy(state->index_allocator); | |
161 | } | |
162 | ||
163 | enum event_notifier_error_accounting_status | |
164 | event_notifier_error_accounting_init(uint64_t buffer_size_kernel, | |
165 | uint64_t buffer_size_ust) | |
166 | { | |
167 | enum event_notifier_error_accounting_status status; | |
168 | ||
169 | status = init_error_accounting_state(&kernel_state, buffer_size_kernel); | |
170 | if (status != EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK) { | |
171 | ERR("Failed to initialize kernel event notifier accounting state: status = %s", | |
172 | error_accounting_status_str(status)); | |
173 | goto end; | |
174 | } | |
175 | ||
176 | status = init_error_accounting_state(&ust_state, buffer_size_ust); | |
177 | if (status != EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK) { | |
178 | ERR("Failed to initialize UST event notifier accounting state: status = %s", | |
179 | error_accounting_status_str(status)); | |
180 | goto error_ust_state; | |
533a90fb FD |
181 | } |
182 | ||
183 | error_counter_uid_ht = lttng_ht_new( | |
184 | ERROR_COUNTER_INDEX_HT_INITIAL_SIZE, LTTNG_HT_TYPE_U64); | |
185 | if (!error_counter_uid_ht) { | |
186 | ERR("Failed to allocate UID to error counter accountant hash table"); | |
90aa04a1 | 187 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NOMEM; |
761ffce2 | 188 | goto error_uid_ht; |
90aa04a1 FD |
189 | } |
190 | ||
90aa04a1 | 191 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; |
761ffce2 | 192 | goto end; |
90aa04a1 | 193 | |
761ffce2 FD |
194 | error_uid_ht: |
195 | fini_error_accounting_state(&ust_state); | |
196 | error_ust_state: | |
197 | fini_error_accounting_state(&kernel_state); | |
198 | end: | |
90aa04a1 FD |
199 | return status; |
200 | } | |
201 | ||
202 | static | |
203 | enum event_notifier_error_accounting_status get_error_counter_index_for_token( | |
761ffce2 FD |
204 | struct error_accounting_state *state, uint64_t tracer_token, |
205 | uint64_t *error_counter_index) | |
90aa04a1 FD |
206 | { |
207 | struct lttng_ht_node_u64 *node; | |
208 | struct lttng_ht_iter iter; | |
209 | const struct index_ht_entry *index_entry; | |
210 | enum event_notifier_error_accounting_status status; | |
211 | ||
212 | rcu_read_lock(); | |
761ffce2 | 213 | lttng_ht_lookup(state->indices_ht, &tracer_token, &iter); |
90aa04a1 FD |
214 | node = lttng_ht_iter_get_node_u64(&iter); |
215 | if (node) { | |
216 | index_entry = caa_container_of( | |
217 | node, const struct index_ht_entry, node); | |
218 | *error_counter_index = index_entry->error_counter_index; | |
219 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; | |
220 | } else { | |
221 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NOT_FOUND; | |
222 | } | |
223 | ||
224 | rcu_read_unlock(); | |
225 | return status; | |
226 | } | |
227 | ||
533a90fb FD |
228 | #ifdef HAVE_LIBLTTNG_UST_CTL |
229 | static | |
761ffce2 | 230 | struct ust_error_accounting_entry *get_uid_accounting_entry(const struct ust_app *app) |
533a90fb | 231 | { |
761ffce2 | 232 | struct ust_error_accounting_entry *entry; |
533a90fb FD |
233 | struct lttng_ht_node_u64 *node; |
234 | struct lttng_ht_iter iter; | |
235 | uint64_t key = app->uid; | |
236 | ||
237 | lttng_ht_lookup(error_counter_uid_ht, &key, &iter); | |
238 | node = lttng_ht_iter_get_node_u64(&iter); | |
239 | if(node == NULL) { | |
240 | entry = NULL; | |
241 | } else { | |
761ffce2 | 242 | entry = caa_container_of(node, struct ust_error_accounting_entry, node); |
533a90fb FD |
243 | } |
244 | ||
245 | return entry; | |
246 | } | |
247 | ||
248 | static | |
761ffce2 | 249 | struct ust_error_accounting_entry *create_uid_accounting_entry( |
533a90fb FD |
250 | const struct ust_app *app) |
251 | { | |
252 | int i, ret; | |
253 | struct ustctl_daemon_counter *daemon_counter; | |
254 | struct lttng_ust_abi_object_data *counter, **cpu_counters; | |
255 | int *cpu_counter_fds = NULL; | |
761ffce2 | 256 | struct ust_error_accounting_entry *entry = NULL; |
533a90fb | 257 | const struct ustctl_counter_dimension dimension = { |
761ffce2 | 258 | .size = ust_state.number_indices, |
533a90fb FD |
259 | .has_underflow = false, |
260 | .has_overflow = false, | |
261 | }; | |
262 | ||
761ffce2 | 263 | entry = zmalloc(sizeof(struct ust_error_accounting_entry)); |
533a90fb FD |
264 | if (!entry) { |
265 | PERROR("Failed to allocate event notifier error acounting entry") | |
266 | goto error; | |
267 | } | |
268 | ||
761ffce2 | 269 | entry->uid = app->uid; |
533a90fb | 270 | entry->nr_counter_cpu_fds = ustctl_get_nr_cpu_per_counter(); |
761ffce2 | 271 | |
533a90fb FD |
272 | cpu_counter_fds = zmalloc(entry->nr_counter_cpu_fds * sizeof(*cpu_counter_fds)); |
273 | if (!cpu_counter_fds) { | |
274 | PERROR("Failed to allocate event notifier error counter file descriptors array: application uid = %d, application name = '%s', pid = %d, allocation size = %zu", | |
275 | (int) app->uid, app->name, (int) app->pid, | |
276 | entry->nr_counter_cpu_fds * sizeof(*cpu_counter_fds)); | |
277 | ret = -1; | |
278 | goto error_counter_cpu_fds_alloc; | |
279 | } | |
280 | ||
281 | /* Initialize to an invalid fd value to closes fds in case of error. */ | |
282 | for (i = 0; i < entry->nr_counter_cpu_fds; i++) { | |
283 | cpu_counter_fds[i] = -1; | |
284 | } | |
285 | ||
74f286be | 286 | cpu_counters = zmalloc(entry->nr_counter_cpu_fds * sizeof(struct lttng_ust_abi_object_data *)); |
533a90fb FD |
287 | if (!cpu_counters) { |
288 | 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", | |
289 | (int) app->uid, app->name, (int) app->pid, | |
74f286be | 290 | entry->nr_counter_cpu_fds * sizeof(struct lttng_ust_abi_object_data *)); |
533a90fb FD |
291 | ret = -1; |
292 | goto error_counter_cpus_alloc; | |
293 | } | |
294 | ||
295 | for (i = 0; i < entry->nr_counter_cpu_fds; i++) { | |
296 | cpu_counter_fds[i] = shm_create_anonymous("event-notifier-error-accounting"); | |
297 | if (cpu_counter_fds[i] == -1) { | |
298 | ERR("Failed to create event notifier error accounting shared memory for application user: application uid = %d, pid = %d, application name = '%s'", | |
299 | (int) app->uid, (int) app->pid, app->name); | |
300 | goto error_shm_alloc; | |
301 | } | |
302 | } | |
303 | ||
304 | /* | |
305 | * Ownership of the file descriptors transferred to the ustctl object. | |
306 | */ | |
307 | daemon_counter = ustctl_create_counter(1, &dimension, 0, -1, | |
308 | entry->nr_counter_cpu_fds, cpu_counter_fds, | |
309 | USTCTL_COUNTER_BITNESS_32, | |
310 | USTCTL_COUNTER_ARITHMETIC_MODULAR, | |
311 | USTCTL_COUNTER_ALLOC_PER_CPU, | |
312 | false); | |
313 | if (!daemon_counter) { | |
314 | goto error_create_daemon_counter; | |
315 | } | |
316 | ||
317 | ret = ustctl_create_counter_data(daemon_counter, &counter); | |
318 | if (ret) { | |
319 | ERR("Failed to create userspace tracer counter data for application user: uid = %d, pid = %d, application name = '%s'", | |
320 | (int) app->uid, (int) app->pid, app->name); | |
321 | goto error_create_counter_data; | |
322 | } | |
323 | ||
324 | for (i = 0; i < entry->nr_counter_cpu_fds; i++) { | |
325 | ret = ustctl_create_counter_cpu_data(daemon_counter, i, | |
326 | &cpu_counters[i]); | |
327 | if (ret) { | |
328 | ERR("Failed to create userspace tracer counter cpu data for application user: uid = %d, pid = %d, application name = '%s'", | |
329 | (int) app->uid, (int) app->pid, | |
330 | app->name); | |
331 | goto error_create_counter_cpu_data; | |
332 | } | |
333 | } | |
334 | ||
335 | entry->daemon_counter = daemon_counter; | |
336 | entry->counter = counter; | |
337 | entry->cpu_counters = cpu_counters; | |
338 | ||
339 | lttng_ht_node_init_u64(&entry->node, app->uid); | |
340 | lttng_ht_add_unique_u64(error_counter_uid_ht, &entry->node); | |
341 | ||
342 | goto end; | |
343 | ||
344 | error_create_counter_cpu_data: | |
345 | /* Teardown any allocated cpu counters. */ | |
346 | for (i = 0; i < entry->nr_counter_cpu_fds; i++) { | |
347 | if (!cpu_counters[i]) { | |
348 | /* | |
349 | * Early-exit when error occurred before all cpu | |
350 | * counters could be initialized. | |
351 | */ | |
352 | break; | |
353 | } | |
354 | ||
355 | ustctl_release_object(-1, cpu_counters[i]); | |
356 | free(cpu_counters[i]); | |
357 | } | |
358 | ||
359 | ustctl_release_object(-1, entry->counter); | |
360 | free(entry->counter); | |
361 | error_create_counter_data: | |
362 | ustctl_destroy_counter(daemon_counter); | |
363 | error_create_daemon_counter: | |
364 | error_shm_alloc: | |
365 | /* Error occured before per-cpu SHMs were handed-off to ustctl. */ | |
366 | if (cpu_counter_fds) { | |
367 | for (i = 0; i < entry->nr_counter_cpu_fds; i++) { | |
368 | if (cpu_counter_fds[i] < 0) { | |
369 | /* | |
370 | * Early-exit when error occurred before all cpu | |
371 | * counter shm fds could be initialized. | |
372 | */ | |
373 | break; | |
374 | } | |
375 | ||
376 | ret = close(cpu_counter_fds[i]); | |
377 | if (ret) { | |
378 | PERROR("Failed to close error counter per-CPU shm file descriptor: fd = %d", cpu_counter_fds[i]); | |
379 | } | |
380 | } | |
381 | } | |
382 | ||
383 | free(cpu_counters); | |
384 | error_counter_cpus_alloc: | |
385 | error_counter_cpu_fds_alloc: | |
386 | free(entry); | |
387 | error: | |
388 | entry = NULL; | |
389 | end: | |
390 | free(cpu_counter_fds); | |
391 | return entry; | |
392 | } | |
393 | ||
394 | static | |
395 | enum event_notifier_error_accounting_status send_counter_data_to_ust( | |
396 | struct ust_app *app, | |
397 | struct lttng_ust_abi_object_data *new_counter) | |
398 | { | |
399 | int ret; | |
400 | enum event_notifier_error_accounting_status status; | |
401 | ||
402 | /* Attach counter to trigger group. */ | |
403 | pthread_mutex_lock(&app->sock_lock); | |
404 | ret = ustctl_send_counter_data_to_ust(app->sock, | |
405 | app->event_notifier_group.object->handle, new_counter); | |
406 | pthread_mutex_unlock(&app->sock_lock); | |
407 | if (ret < 0) { | |
408 | if (ret != -EPIPE && ret != -LTTNG_UST_ERR_EXITING) { | |
409 | ERR("Failed to send counter data to application: application name = '%s', pid = %d, ret = %d", | |
410 | app->name, app->pid, ret); | |
411 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; | |
412 | } else { | |
413 | DBG3("Failed to send counter data to application (application is dead): application name = '%s', pid = %d, ret = %d", | |
414 | app->name, app->pid, ret); | |
415 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_APP_DEAD; | |
416 | } | |
417 | ||
418 | goto end; | |
419 | } | |
420 | ||
421 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; | |
422 | end: | |
423 | return status; | |
424 | } | |
425 | ||
426 | static | |
427 | enum event_notifier_error_accounting_status send_counter_cpu_data_to_ust( | |
428 | struct ust_app *app, | |
429 | struct lttng_ust_abi_object_data *counter, | |
430 | struct lttng_ust_abi_object_data *counter_cpu) | |
431 | { | |
432 | int ret; | |
433 | enum event_notifier_error_accounting_status status; | |
434 | ||
435 | pthread_mutex_lock(&app->sock_lock); | |
436 | ret = ustctl_send_counter_cpu_data_to_ust(app->sock, | |
437 | counter, counter_cpu); | |
438 | pthread_mutex_unlock(&app->sock_lock); | |
439 | if (ret < 0) { | |
440 | if (ret != -EPIPE && ret != -LTTNG_UST_ERR_EXITING) { | |
441 | ERR("Failed to send counter CPU data to application: application name = '%s', pid = %d, ret = %d", | |
442 | app->name, app->pid, ret); | |
443 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; | |
444 | } else { | |
445 | DBG3("Failed to send counter CPU data to application: application name = '%s', pid = %d, ret = %d", | |
446 | app->name, app->pid, ret); | |
447 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_APP_DEAD; | |
448 | } | |
449 | ||
450 | goto end; | |
451 | } | |
452 | ||
453 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; | |
454 | end: | |
455 | return status; | |
456 | } | |
457 | ||
458 | enum event_notifier_error_accounting_status | |
459 | event_notifier_error_accounting_register_app(struct ust_app *app) | |
460 | { | |
461 | int ret; | |
462 | uint64_t i; | |
463 | struct lttng_ust_abi_object_data *new_counter; | |
761ffce2 | 464 | struct ust_error_accounting_entry *entry; |
533a90fb FD |
465 | enum event_notifier_error_accounting_status status; |
466 | struct lttng_ust_abi_object_data **cpu_counters; | |
467 | ||
468 | /* | |
469 | * Check if we already have a error counter for the user id of this | |
470 | * app. If not, create one. | |
471 | */ | |
472 | rcu_read_lock(); | |
473 | entry = get_uid_accounting_entry(app); | |
474 | if (entry == NULL) { | |
475 | entry = create_uid_accounting_entry(app); | |
476 | if (!entry) { | |
477 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; | |
478 | goto end; | |
479 | } | |
480 | } | |
481 | ||
482 | /* Duplicate counter object data. */ | |
483 | ret = ustctl_duplicate_ust_object_data(&new_counter, | |
484 | entry->counter); | |
485 | if (ret) { | |
486 | ERR("Failed to duplicate event notifier error accounting counter for application user: application uid = %d, pid = %d, application name = '%s'", | |
487 | (int) app->uid, (int) app->pid, app->name); | |
488 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; | |
489 | goto end; | |
490 | } | |
491 | ||
492 | status = send_counter_data_to_ust(app, new_counter); | |
493 | if (status != EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK) { | |
cd9c532c FD |
494 | if (status == EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_APP_DEAD) { |
495 | goto error_send_counter_data; | |
496 | } | |
497 | ||
533a90fb FD |
498 | ERR("Failed to send counter data to application tracer: status = %s, application uid = %d, pid = %d, application name = '%s'", |
499 | error_accounting_status_str(status), | |
500 | (int) app->uid, (int) app->pid, app->name); | |
501 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; | |
502 | goto error_send_counter_data; | |
503 | } | |
504 | ||
477b83a4 | 505 | cpu_counters = zmalloc(entry->nr_counter_cpu_fds * sizeof(struct lttng_ust_abi_object_data *)); |
533a90fb FD |
506 | if (!cpu_counters) { |
507 | 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", | |
508 | (int) app->uid, app->name, (int) app->pid, | |
509 | entry->nr_counter_cpu_fds * sizeof(**cpu_counters)); | |
510 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NOMEM; | |
511 | goto error_allocate_cpu_counters; | |
512 | } | |
513 | ||
514 | for (i = 0; i < entry->nr_counter_cpu_fds; i++) { | |
515 | struct lttng_ust_abi_object_data *new_counter_cpu = NULL; | |
516 | ||
517 | ret = ustctl_duplicate_ust_object_data(&new_counter_cpu, | |
518 | entry->cpu_counters[i]); | |
519 | if (ret) { | |
520 | ERR("Failed to duplicate userspace tracer counter cpu data for application user: uid = %d, pid = %d, application name = '%s'", | |
521 | (int) app->uid, (int) app->pid, | |
522 | app->name); | |
523 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NOMEM; | |
524 | goto error_duplicate_cpu_counter; | |
525 | } | |
526 | ||
527 | cpu_counters[i] = new_counter_cpu; | |
528 | ||
529 | status = send_counter_cpu_data_to_ust(app, new_counter, | |
530 | new_counter_cpu); | |
531 | if (status != EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK) { | |
cd9c532c FD |
532 | if (status == EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_APP_DEAD) { |
533 | goto error_send_cpu_counter_data; | |
534 | } | |
535 | ||
533a90fb FD |
536 | ERR("Failed to send counter cpu data to application tracer: status = %s, application uid = %d, pid = %d, application name = '%s'", |
537 | error_accounting_status_str(status), | |
538 | (int) app->uid, (int) app->pid, | |
539 | app->name); | |
540 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; | |
541 | goto error_send_cpu_counter_data; | |
542 | } | |
543 | } | |
544 | ||
545 | app->event_notifier_group.counter = new_counter; | |
546 | new_counter = NULL; | |
547 | app->event_notifier_group.nr_counter_cpu = entry->nr_counter_cpu_fds; | |
548 | app->event_notifier_group.counter_cpu = cpu_counters; | |
549 | cpu_counters = NULL; | |
550 | goto end; | |
551 | ||
533a90fb FD |
552 | error_send_cpu_counter_data: |
553 | error_duplicate_cpu_counter: | |
554 | /* Teardown any duplicated cpu counters. */ | |
555 | for (i = 0; i < entry->nr_counter_cpu_fds; i++) { | |
556 | if (!cpu_counters[i]) { | |
557 | /* | |
558 | * Early-exit when error occurred before all cpu | |
559 | * counters could be initialized. | |
560 | */ | |
561 | break; | |
562 | } | |
563 | ||
564 | ustctl_release_object(-1, cpu_counters[i]); | |
565 | free(cpu_counters[i]); | |
566 | } | |
567 | ||
a55f8ad1 JG |
568 | free(cpu_counters); |
569 | ||
5d650dcd | 570 | error_allocate_cpu_counters: |
533a90fb FD |
571 | error_send_counter_data: |
572 | ustctl_release_object(-1, new_counter); | |
573 | free(new_counter); | |
574 | end: | |
575 | rcu_read_unlock(); | |
576 | return status; | |
577 | } | |
578 | ||
579 | enum event_notifier_error_accounting_status | |
580 | event_notifier_error_accounting_unregister_app(struct ust_app *app) | |
581 | { | |
582 | enum event_notifier_error_accounting_status status; | |
761ffce2 | 583 | struct ust_error_accounting_entry *entry; |
533a90fb FD |
584 | int i; |
585 | ||
586 | rcu_read_lock(); | |
587 | entry = get_uid_accounting_entry(app); | |
588 | if (entry == NULL) { | |
589 | ERR("Failed to find event notitifier error accounting entry on application teardown: pid = %d, application name = '%s'", | |
590 | app->pid, app->name); | |
591 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; | |
592 | goto end; | |
593 | } | |
594 | ||
595 | for (i = 0; i < app->event_notifier_group.nr_counter_cpu; i++) { | |
596 | ustctl_release_object(app->sock, | |
597 | app->event_notifier_group.counter_cpu[i]); | |
598 | free(app->event_notifier_group.counter_cpu[i]); | |
599 | } | |
600 | ||
601 | free(app->event_notifier_group.counter_cpu); | |
602 | ||
603 | ustctl_release_object(app->sock, app->event_notifier_group.counter); | |
604 | free(app->event_notifier_group.counter); | |
605 | ||
606 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; | |
607 | end: | |
608 | rcu_read_unlock(); | |
609 | return status; | |
610 | } | |
611 | ||
612 | static | |
613 | enum event_notifier_error_accounting_status | |
614 | event_notifier_error_accounting_ust_get_count( | |
615 | const struct lttng_trigger *trigger, uint64_t *count) | |
616 | { | |
617 | struct lttng_ht_iter iter; | |
761ffce2 | 618 | struct ust_error_accounting_entry *uid_entry; |
533a90fb FD |
619 | uint64_t error_counter_index, global_sum = 0; |
620 | enum event_notifier_error_accounting_status status; | |
621 | size_t dimension_indexes[1]; | |
622 | const uint64_t tracer_token = lttng_trigger_get_tracer_token(trigger); | |
761ffce2 FD |
623 | uid_t trigger_owner_uid; |
624 | const char *trigger_name; | |
533a90fb | 625 | |
533a90fb FD |
626 | |
627 | rcu_read_lock(); | |
628 | ||
761ffce2 FD |
629 | get_trigger_info_for_log(trigger, &trigger_name, &trigger_owner_uid); |
630 | ||
631 | /* | |
632 | * At the moment, the error counter index is domain wide. This means | |
633 | * that if UID 1000 registers a event notifier and is allocated index 0 | |
634 | * in it's error counter, index zero will be unused in error counter of | |
635 | * all other users. | |
636 | */ | |
533a90fb | 637 | status = get_error_counter_index_for_token( |
761ffce2 | 638 | &ust_state, |
533a90fb FD |
639 | tracer_token, |
640 | &error_counter_index); | |
641 | if (status != EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK) { | |
533a90fb FD |
642 | |
643 | ERR("Failed to retrieve index for tracer token: token = %" PRIu64 ", trigger name = '%s', trigger owner uid = %d, status = %s", | |
644 | tracer_token, trigger_name, | |
645 | (int) trigger_owner_uid, | |
646 | error_accounting_status_str(status)); | |
647 | goto end; | |
648 | } | |
649 | ||
650 | dimension_indexes[0] = error_counter_index; | |
651 | ||
761ffce2 FD |
652 | /* |
653 | * Iterate over all the UID entries. | |
654 | * We aggregate the value of all uid entries regardless of if the uid | |
655 | * matches the trigger's uid because a user that is allowed to register | |
656 | * a trigger to a given sessiond is also allowed to create an event | |
657 | * notifier on all apps that this sessiond is aware of. | |
658 | */ | |
533a90fb FD |
659 | cds_lfht_for_each_entry(error_counter_uid_ht->ht, &iter.iter, |
660 | uid_entry, node.node) { | |
661 | int ret; | |
662 | int64_t local_value = 0; | |
663 | bool overflow = false, underflow = false; | |
664 | ||
665 | ret = ustctl_counter_aggregate(uid_entry->daemon_counter, | |
666 | dimension_indexes, &local_value, &overflow, | |
667 | &underflow); | |
668 | if (ret || local_value < 0) { | |
533a90fb FD |
669 | if (ret) { |
670 | ERR("Failed to aggregate event notifier error counter values of trigger: trigger name = '%s', trigger owner uid = %d", | |
671 | trigger_name, | |
672 | (int) trigger_owner_uid); | |
673 | } else if (local_value < 0) { | |
674 | ERR("Negative event notifier error counter value encountered during aggregation: trigger name = '%s', trigger owner uid = %d, value = %" PRId64, | |
675 | trigger_name, | |
676 | (int) trigger_owner_uid, | |
677 | local_value); | |
678 | } else { | |
679 | abort(); | |
680 | } | |
681 | ||
682 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; | |
683 | goto end; | |
684 | } | |
685 | ||
686 | /* Cast is safe as negative values are checked-for above. */ | |
687 | global_sum += (uint64_t) local_value; | |
533a90fb FD |
688 | } |
689 | ||
690 | *count = global_sum; | |
691 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; | |
692 | ||
693 | end: | |
694 | rcu_read_unlock(); | |
695 | return status; | |
696 | } | |
697 | ||
698 | static | |
699 | enum event_notifier_error_accounting_status event_notifier_error_accounting_ust_clear( | |
700 | const struct lttng_trigger *trigger) | |
701 | { | |
702 | struct lttng_ht_iter iter; | |
761ffce2 | 703 | struct ust_error_accounting_entry *uid_entry; |
533a90fb FD |
704 | uint64_t error_counter_index; |
705 | enum event_notifier_error_accounting_status status; | |
706 | size_t dimension_index; | |
707 | const uint64_t tracer_token = lttng_trigger_get_tracer_token(trigger); | |
708 | ||
709 | /* | |
710 | * Go over all error counters (ignoring uid) as a trigger (and trigger | |
711 | * errors) can be generated from any applications that this session | |
712 | * daemon is managing. | |
713 | */ | |
714 | ||
715 | rcu_read_lock(); | |
716 | status = get_error_counter_index_for_token( | |
761ffce2 | 717 | &ust_state, |
533a90fb FD |
718 | tracer_token, |
719 | &error_counter_index); | |
720 | if (status != EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK) { | |
721 | uid_t trigger_owner_uid; | |
722 | const char *trigger_name; | |
723 | ||
724 | get_trigger_info_for_log(trigger, &trigger_name, | |
725 | &trigger_owner_uid); | |
726 | ||
727 | ERR("Failed to retrieve index for tracer token: token = %" PRIu64 ", trigger name = '%s', trigger owner uid = %d, status = %s", | |
728 | tracer_token, trigger_name, | |
729 | (int) trigger_owner_uid, | |
730 | error_accounting_status_str(status)); | |
731 | goto end; | |
732 | } | |
733 | ||
734 | dimension_index = error_counter_index; | |
735 | ||
736 | cds_lfht_for_each_entry(error_counter_uid_ht->ht, &iter.iter, | |
737 | uid_entry, node.node) { | |
738 | const int ret = ustctl_counter_clear(uid_entry->daemon_counter, | |
739 | &dimension_index); | |
740 | ||
741 | if (ret) { | |
742 | uid_t trigger_owner_uid; | |
743 | const char *trigger_name; | |
744 | ||
745 | get_trigger_info_for_log(trigger, &trigger_name, | |
746 | &trigger_owner_uid); | |
747 | ERR("Failed to clear event notifier counter value for trigger: counter uid = %d, trigger name = '%s', trigger owner uid = %d", | |
748 | (int) uid_entry->node.key, trigger_name, | |
749 | (int) trigger_owner_uid); | |
750 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; | |
751 | goto end; | |
752 | } | |
753 | } | |
754 | ||
755 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; | |
756 | end: | |
757 | rcu_read_unlock(); | |
758 | return status; | |
759 | } | |
760 | #endif /* HAVE_LIBLTTNG_UST_CTL */ | |
761 | ||
90aa04a1 FD |
762 | static |
763 | enum event_notifier_error_accounting_status | |
764 | event_notifier_error_accounting_kernel_clear( | |
765 | const struct lttng_trigger *trigger) | |
766 | { | |
767 | int ret; | |
768 | uint64_t error_counter_index; | |
769 | enum event_notifier_error_accounting_status status; | |
770 | struct lttng_kernel_counter_clear counter_clear = {}; | |
771 | ||
772 | status = get_error_counter_index_for_token( | |
761ffce2 | 773 | &kernel_state, |
90aa04a1 FD |
774 | lttng_trigger_get_tracer_token(trigger), |
775 | &error_counter_index); | |
776 | if (status != EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK) { | |
777 | uid_t trigger_owner_uid; | |
778 | const char *trigger_name; | |
90aa04a1 | 779 | |
533a90fb FD |
780 | get_trigger_info_for_log( |
781 | trigger, &trigger_name, &trigger_owner_uid); | |
782 | ||
783 | ERR("Failed to get event notifier error counter index: trigger owner uid = %d, trigger name = '%s', status = '%s'", | |
784 | trigger_owner_uid, trigger_name, | |
785 | error_accounting_status_str(status)); | |
90aa04a1 FD |
786 | goto end; |
787 | } | |
788 | ||
789 | counter_clear.index.number_dimensions = 1; | |
790 | counter_clear.index.dimension_indexes[0] = error_counter_index; | |
791 | ||
792 | ret = kernctl_counter_clear( | |
793 | kernel_error_accountant.kernel_event_notifier_error_counter_fd, | |
794 | &counter_clear); | |
795 | if (ret) { | |
533a90fb FD |
796 | uid_t trigger_owner_uid; |
797 | const char *trigger_name; | |
798 | ||
799 | get_trigger_info_for_log( | |
800 | trigger, &trigger_name, &trigger_owner_uid); | |
801 | ||
802 | ERR("Failed to clear kernel event notifier error counter: trigger owner uid = %d, trigger name = '%s'", | |
803 | trigger_owner_uid, trigger_name); | |
90aa04a1 FD |
804 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; |
805 | goto end; | |
806 | } | |
807 | ||
808 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; | |
809 | end: | |
810 | return status; | |
811 | } | |
812 | ||
813 | enum event_notifier_error_accounting_status | |
814 | event_notifier_error_accounting_register_kernel( | |
815 | int kernel_event_notifier_group_fd) | |
816 | { | |
817 | int error_counter_fd = -1, ret; | |
818 | enum event_notifier_error_accounting_status status; | |
819 | const struct lttng_kernel_counter_conf error_counter_conf = { | |
820 | .arithmetic = LTTNG_KERNEL_COUNTER_ARITHMETIC_MODULAR, | |
821 | .bitness = sizeof(void *) == sizeof(uint32_t) ? | |
822 | LTTNG_KERNEL_COUNTER_BITNESS_32 : | |
823 | LTTNG_KERNEL_COUNTER_BITNESS_64, | |
824 | .global_sum_step = 0, | |
825 | .number_dimensions = 1, | |
761ffce2 | 826 | .dimensions[0].size = kernel_state.number_indices, |
90aa04a1 FD |
827 | .dimensions[0].has_underflow = false, |
828 | .dimensions[0].has_overflow = false, | |
829 | }; | |
830 | ||
831 | ret = kernctl_create_event_notifier_group_error_counter( | |
832 | kernel_event_notifier_group_fd, &error_counter_conf); | |
833 | if (ret < 0) { | |
834 | PERROR("Failed to create event notifier group error counter through kernel ioctl: kernel_event_notifier_group_fd = %d", | |
835 | kernel_event_notifier_group_fd); | |
836 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; | |
837 | goto error; | |
838 | } | |
839 | ||
840 | error_counter_fd = ret; | |
841 | ||
842 | /* Prevent fd duplication after execlp(). */ | |
843 | ret = fcntl(error_counter_fd, F_SETFD, FD_CLOEXEC); | |
844 | if (ret < 0) { | |
845 | PERROR("Failed to set FD_CLOEXEC flag on event notifier error counter file descriptor: error_counter_fd = %d", | |
846 | error_counter_fd); | |
847 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; | |
848 | goto error; | |
849 | } | |
850 | ||
851 | DBG("Created kernel event notifier group error counter: fd = %d", | |
852 | error_counter_fd); | |
853 | ||
854 | kernel_error_accountant.kernel_event_notifier_error_counter_fd = | |
855 | error_counter_fd; | |
856 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; | |
857 | ||
858 | error: | |
859 | return status; | |
860 | } | |
861 | ||
862 | static | |
863 | enum event_notifier_error_accounting_status create_error_counter_index_for_token( | |
761ffce2 FD |
864 | struct error_accounting_state *state, uint64_t tracer_token, |
865 | uint64_t *error_counter_index) | |
90aa04a1 FD |
866 | { |
867 | struct index_ht_entry *index_entry; | |
868 | enum lttng_index_allocator_status index_alloc_status; | |
869 | uint64_t local_error_counter_index; | |
870 | enum event_notifier_error_accounting_status status; | |
871 | ||
761ffce2 FD |
872 | assert(state); |
873 | ||
90aa04a1 | 874 | /* Allocate a new index for that counter. */ |
761ffce2 | 875 | index_alloc_status = lttng_index_allocator_alloc(state->index_allocator, |
90aa04a1 FD |
876 | &local_error_counter_index); |
877 | switch (index_alloc_status) { | |
878 | case LTTNG_INDEX_ALLOCATOR_STATUS_EMPTY: | |
879 | DBG("No indices left in the configured event notifier error counter: " | |
880 | "number-of-indices = %"PRIu64, | |
881 | lttng_index_allocator_get_index_count( | |
761ffce2 | 882 | state->index_allocator)); |
90aa04a1 FD |
883 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NO_INDEX_AVAILABLE; |
884 | goto end; | |
885 | case LTTNG_INDEX_ALLOCATOR_STATUS_OK: | |
886 | break; | |
887 | default: | |
888 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; | |
889 | goto end; | |
890 | } | |
891 | ||
892 | index_entry = zmalloc(sizeof(*index_entry)); | |
893 | if (index_entry == NULL) { | |
894 | PERROR("Failed to allocate event notifier error counter hash table entry"); | |
895 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NOMEM; | |
896 | goto end; | |
897 | } | |
898 | ||
899 | index_entry->error_counter_index = local_error_counter_index; | |
900 | lttng_ht_node_init_u64(&index_entry->node, tracer_token); | |
761ffce2 | 901 | lttng_ht_add_unique_u64(state->indices_ht, &index_entry->node); |
90aa04a1 FD |
902 | |
903 | DBG("Allocated error counter index for tracer token: tracer token = %" PRIu64 ", index = %" PRIu64, | |
904 | tracer_token, local_error_counter_index); | |
905 | *error_counter_index = local_error_counter_index; | |
906 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; | |
907 | end: | |
908 | return status; | |
909 | } | |
910 | ||
911 | enum event_notifier_error_accounting_status | |
912 | event_notifier_error_accounting_register_event_notifier( | |
913 | const struct lttng_trigger *trigger, | |
914 | uint64_t *error_counter_index) | |
915 | { | |
916 | enum event_notifier_error_accounting_status status; | |
917 | uint64_t local_error_counter_index; | |
761ffce2 FD |
918 | struct error_accounting_state *state; |
919 | ||
920 | switch (lttng_trigger_get_underlying_domain_type_restriction(trigger)) { | |
921 | case LTTNG_DOMAIN_KERNEL: | |
922 | state = &kernel_state; | |
923 | break; | |
924 | case LTTNG_DOMAIN_UST: | |
925 | state = &ust_state; | |
926 | break; | |
927 | default: | |
928 | abort(); | |
929 | } | |
90aa04a1 FD |
930 | |
931 | /* | |
932 | * Check if this event notifier already has a error counter index | |
933 | * assigned. | |
934 | */ | |
761ffce2 | 935 | status = get_error_counter_index_for_token(state, |
90aa04a1 FD |
936 | lttng_trigger_get_tracer_token(trigger), |
937 | &local_error_counter_index); | |
938 | switch (status) { | |
939 | case EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NOT_FOUND: | |
940 | { | |
941 | uid_t trigger_owner_uid; | |
942 | const char *trigger_name; | |
90aa04a1 | 943 | |
533a90fb FD |
944 | get_trigger_info_for_log( |
945 | trigger, &trigger_name, &trigger_owner_uid); | |
946 | ||
947 | 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, | |
948 | trigger_name, trigger_owner_uid, | |
90aa04a1 | 949 | lttng_trigger_get_tracer_token(trigger)); |
533a90fb | 950 | |
761ffce2 | 951 | status = create_error_counter_index_for_token(state, |
90aa04a1 FD |
952 | lttng_trigger_get_tracer_token(trigger), |
953 | &local_error_counter_index); | |
954 | if (status != EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK) { | |
533a90fb FD |
955 | ERR("Error creating index for token: status = %s, trigger name = '%s', trigger owner uid = %d", |
956 | error_accounting_status_str(status), | |
957 | trigger_name, trigger_owner_uid); | |
90aa04a1 FD |
958 | goto end; |
959 | } | |
960 | /* fall-through. */ | |
961 | } | |
962 | case EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK: | |
963 | *error_counter_index = local_error_counter_index; | |
964 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; | |
965 | break; | |
966 | default: | |
967 | break; | |
968 | } | |
969 | ||
970 | end: | |
971 | return status; | |
972 | } | |
973 | ||
974 | static | |
975 | enum event_notifier_error_accounting_status | |
976 | event_notifier_error_accounting_kernel_get_count( | |
977 | const struct lttng_trigger *trigger, uint64_t *count) | |
978 | { | |
979 | struct lttng_kernel_counter_aggregate counter_aggregate = {}; | |
980 | enum event_notifier_error_accounting_status status; | |
981 | uint64_t error_counter_index; | |
982 | int ret; | |
983 | ||
984 | status = get_error_counter_index_for_token( | |
761ffce2 FD |
985 | &kernel_state, |
986 | lttng_trigger_get_tracer_token(trigger), | |
987 | &error_counter_index); | |
90aa04a1 | 988 | if (status != EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK) { |
533a90fb FD |
989 | ERR("Error getting index for token: status=%s", |
990 | error_accounting_status_str(status)); | |
90aa04a1 FD |
991 | goto end; |
992 | } | |
993 | ||
994 | counter_aggregate.index.number_dimensions = 1; | |
995 | counter_aggregate.index.dimension_indexes[0] = error_counter_index; | |
996 | ||
997 | assert(kernel_error_accountant.kernel_event_notifier_error_counter_fd); | |
998 | ||
999 | ret = kernctl_counter_get_aggregate_value( | |
1000 | kernel_error_accountant.kernel_event_notifier_error_counter_fd, | |
1001 | &counter_aggregate); | |
1002 | if (ret || counter_aggregate.value.value < 0) { | |
1003 | uid_t trigger_owner_uid; | |
1004 | const char *trigger_name; | |
533a90fb FD |
1005 | |
1006 | get_trigger_info_for_log(trigger, &trigger_name, | |
1007 | &trigger_owner_uid); | |
90aa04a1 FD |
1008 | |
1009 | if (counter_aggregate.value.value < 0) { | |
1010 | ERR("Invalid negative event notifier error counter value: trigger owner = %d, trigger name = '%s', value = %" PRId64, | |
1011 | trigger_owner_uid, trigger_name, | |
1012 | counter_aggregate.value.value); | |
1013 | } else { | |
1014 | ERR("Failed to getting event notifier error count: trigger owner = %d, trigger name = '%s', ret = %d", | |
1015 | trigger_owner_uid, trigger_name, ret); | |
1016 | } | |
1017 | ||
1018 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; | |
1019 | goto end; | |
1020 | } | |
1021 | ||
1022 | /* Error count can't be negative. */ | |
1023 | assert(counter_aggregate.value.value >= 0); | |
1024 | *count = (uint64_t) counter_aggregate.value.value; | |
1025 | ||
1026 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; | |
1027 | ||
1028 | end: | |
1029 | return status; | |
1030 | } | |
1031 | ||
1032 | enum event_notifier_error_accounting_status | |
1033 | event_notifier_error_accounting_get_count( | |
1034 | const struct lttng_trigger *trigger, uint64_t *count) | |
1035 | { | |
1036 | switch (lttng_trigger_get_underlying_domain_type_restriction(trigger)) { | |
1037 | case LTTNG_DOMAIN_KERNEL: | |
1038 | return event_notifier_error_accounting_kernel_get_count( | |
1039 | trigger, count); | |
1040 | case LTTNG_DOMAIN_UST: | |
533a90fb | 1041 | #ifdef HAVE_LIBLTTNG_UST_CTL |
761ffce2 FD |
1042 | return event_notifier_error_accounting_ust_get_count(trigger, |
1043 | count); | |
533a90fb | 1044 | #else |
90aa04a1 | 1045 | return EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; |
533a90fb | 1046 | #endif /* HAVE_LIBLTTNG_UST_CTL */ |
90aa04a1 FD |
1047 | default: |
1048 | abort(); | |
1049 | } | |
1050 | } | |
1051 | ||
1052 | static | |
1053 | enum event_notifier_error_accounting_status | |
1054 | event_notifier_error_accounting_clear(const struct lttng_trigger *trigger) | |
1055 | { | |
1056 | switch (lttng_trigger_get_underlying_domain_type_restriction(trigger)) { | |
1057 | case LTTNG_DOMAIN_KERNEL: | |
1058 | return event_notifier_error_accounting_kernel_clear(trigger); | |
1059 | case LTTNG_DOMAIN_UST: | |
533a90fb FD |
1060 | #ifdef HAVE_LIBLTTNG_UST_CTL |
1061 | return event_notifier_error_accounting_ust_clear(trigger); | |
1062 | #else | |
90aa04a1 | 1063 | return EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; |
533a90fb | 1064 | #endif /* HAVE_LIBLTTNG_UST_CTL */ |
90aa04a1 FD |
1065 | default: |
1066 | abort(); | |
1067 | } | |
1068 | } | |
1069 | ||
1070 | static void free_index_ht_entry(struct rcu_head *head) | |
1071 | { | |
1072 | struct index_ht_entry *entry = caa_container_of(head, | |
1073 | struct index_ht_entry, rcu_head); | |
1074 | ||
1075 | free(entry); | |
1076 | } | |
1077 | ||
1078 | void event_notifier_error_accounting_unregister_event_notifier( | |
1079 | const struct lttng_trigger *trigger) | |
1080 | { | |
1081 | struct lttng_ht_iter iter; | |
1082 | struct lttng_ht_node_u64 *node; | |
533a90fb | 1083 | const uint64_t tracer_token = lttng_trigger_get_tracer_token(trigger); |
90aa04a1 | 1084 | enum event_notifier_error_accounting_status status; |
761ffce2 | 1085 | struct error_accounting_state *state; |
90aa04a1 FD |
1086 | |
1087 | status = event_notifier_error_accounting_clear(trigger); | |
1088 | if (status != EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK) { | |
533a90fb FD |
1089 | /* Trigger details already logged by callee on error. */ |
1090 | ERR("Failed to clear event notifier error counter during unregistration of event notifier: status = '%s'", | |
1091 | error_accounting_status_str(status)); | |
90aa04a1 FD |
1092 | } |
1093 | ||
761ffce2 FD |
1094 | switch (lttng_trigger_get_underlying_domain_type_restriction(trigger)) { |
1095 | case LTTNG_DOMAIN_KERNEL: | |
1096 | state = &kernel_state; | |
1097 | break; | |
1098 | case LTTNG_DOMAIN_UST: | |
1099 | state = &ust_state; | |
1100 | break; | |
1101 | default: | |
1102 | abort(); | |
1103 | } | |
1104 | ||
90aa04a1 | 1105 | rcu_read_lock(); |
761ffce2 | 1106 | lttng_ht_lookup(state->indices_ht, &tracer_token, &iter); |
90aa04a1 | 1107 | node = lttng_ht_iter_get_node_u64(&iter); |
533a90fb | 1108 | if (node) { |
44d0e2f1 | 1109 | int del_ret; |
533a90fb FD |
1110 | struct index_ht_entry *index_entry = caa_container_of( |
1111 | node, typeof(*index_entry), node); | |
1112 | enum lttng_index_allocator_status index_alloc_status; | |
1113 | ||
90aa04a1 | 1114 | index_alloc_status = lttng_index_allocator_release( |
761ffce2 | 1115 | state->index_allocator, |
90aa04a1 FD |
1116 | index_entry->error_counter_index); |
1117 | if (index_alloc_status != LTTNG_INDEX_ALLOCATOR_STATUS_OK) { | |
533a90fb FD |
1118 | uid_t trigger_owner_uid; |
1119 | const char *trigger_name; | |
1120 | ||
1121 | get_trigger_info_for_log(trigger, &trigger_name, | |
1122 | &trigger_owner_uid); | |
1123 | ||
1124 | ERR("Failed to release event notifier error counter index: index = %" PRIu64 ", trigger name = '%s', trigger owner uid = %d", | |
1125 | index_entry->error_counter_index, | |
1126 | trigger_name, (int) trigger_owner_uid); | |
1127 | /* Don't exit, perform the rest of the clean-up. */ | |
90aa04a1 FD |
1128 | } |
1129 | ||
761ffce2 | 1130 | del_ret = lttng_ht_del(state->indices_ht, &iter); |
44d0e2f1 | 1131 | assert(!del_ret); |
90aa04a1 FD |
1132 | call_rcu(&index_entry->rcu_head, free_index_ht_entry); |
1133 | } | |
1134 | ||
1135 | rcu_read_unlock(); | |
1136 | } | |
1137 | ||
533a90fb FD |
1138 | #ifdef HAVE_LIBLTTNG_UST_CTL |
1139 | static void free_error_account_entry(struct rcu_head *head) | |
1140 | { | |
1141 | int i; | |
761ffce2 | 1142 | struct ust_error_accounting_entry *entry = |
533a90fb FD |
1143 | caa_container_of(head, typeof(*entry), rcu_head); |
1144 | ||
1145 | for (i = 0; i < entry->nr_counter_cpu_fds; i++) { | |
1146 | ustctl_release_object(-1, entry->cpu_counters[i]); | |
1147 | free(entry->cpu_counters[i]); | |
1148 | } | |
1149 | ||
1150 | free(entry->cpu_counters); | |
1151 | ||
1152 | ustctl_release_object(-1, entry->counter); | |
1153 | free(entry->counter); | |
1154 | ||
1155 | ustctl_destroy_counter(entry->daemon_counter); | |
1156 | ||
1157 | free(entry); | |
1158 | } | |
1159 | #else | |
1160 | /* Not called without UST support. */ | |
1161 | static void free_error_account_entry(struct rcu_head *head) {} | |
1162 | #endif /* HAVE_LIBLTTNG_UST_CTL */ | |
1163 | ||
90aa04a1 FD |
1164 | void event_notifier_error_accounting_fini(void) |
1165 | { | |
533a90fb | 1166 | struct lttng_ht_iter iter; |
761ffce2 | 1167 | struct ust_error_accounting_entry *uid_entry; |
90aa04a1 FD |
1168 | |
1169 | if (kernel_error_accountant.kernel_event_notifier_error_counter_fd) { | |
1170 | const int ret = close(kernel_error_accountant.kernel_event_notifier_error_counter_fd); | |
1171 | ||
1172 | if (ret) { | |
1173 | PERROR("Failed to close kernel event notifier error counter"); | |
1174 | } | |
1175 | } | |
1176 | ||
1177 | /* | |
533a90fb FD |
1178 | * FIXME error account entries are not reference-counted and torn |
1179 | * down on last use. They exist from the moment of their first use | |
1180 | * up until the teardown of the session daemon. | |
1181 | */ | |
1182 | rcu_read_lock(); | |
1183 | cds_lfht_for_each_entry(error_counter_uid_ht->ht, &iter.iter, | |
1184 | uid_entry, node.node) { | |
1185 | cds_lfht_del(error_counter_uid_ht->ht, &uid_entry->node.node); | |
1186 | call_rcu(&uid_entry->rcu_head, free_error_account_entry); | |
1187 | } | |
1188 | rcu_read_unlock(); | |
761ffce2 | 1189 | |
533a90fb FD |
1190 | lttng_ht_destroy(error_counter_uid_ht); |
1191 | ||
761ffce2 FD |
1192 | fini_error_accounting_state(&kernel_state); |
1193 | fini_error_accounting_state(&ust_state); | |
90aa04a1 | 1194 | } |