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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 | ||
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) { | |
494 | ERR("Failed to send counter data to application tracer: status = %s, application uid = %d, pid = %d, application name = '%s'", | |
495 | error_accounting_status_str(status), | |
496 | (int) app->uid, (int) app->pid, app->name); | |
497 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; | |
498 | goto error_send_counter_data; | |
499 | } | |
500 | ||
477b83a4 | 501 | cpu_counters = zmalloc(entry->nr_counter_cpu_fds * sizeof(struct lttng_ust_abi_object_data *)); |
533a90fb FD |
502 | if (!cpu_counters) { |
503 | 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", | |
504 | (int) app->uid, app->name, (int) app->pid, | |
505 | entry->nr_counter_cpu_fds * sizeof(**cpu_counters)); | |
506 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NOMEM; | |
507 | goto error_allocate_cpu_counters; | |
508 | } | |
509 | ||
510 | for (i = 0; i < entry->nr_counter_cpu_fds; i++) { | |
511 | struct lttng_ust_abi_object_data *new_counter_cpu = NULL; | |
512 | ||
513 | ret = ustctl_duplicate_ust_object_data(&new_counter_cpu, | |
514 | entry->cpu_counters[i]); | |
515 | if (ret) { | |
516 | ERR("Failed to duplicate userspace tracer counter cpu data for application user: uid = %d, pid = %d, application name = '%s'", | |
517 | (int) app->uid, (int) app->pid, | |
518 | app->name); | |
519 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NOMEM; | |
520 | goto error_duplicate_cpu_counter; | |
521 | } | |
522 | ||
523 | cpu_counters[i] = new_counter_cpu; | |
524 | ||
525 | status = send_counter_cpu_data_to_ust(app, new_counter, | |
526 | new_counter_cpu); | |
527 | if (status != EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK) { | |
528 | ERR("Failed to send counter cpu data to application tracer: status = %s, application uid = %d, pid = %d, application name = '%s'", | |
529 | error_accounting_status_str(status), | |
530 | (int) app->uid, (int) app->pid, | |
531 | app->name); | |
532 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; | |
533 | goto error_send_cpu_counter_data; | |
534 | } | |
535 | } | |
536 | ||
537 | app->event_notifier_group.counter = new_counter; | |
538 | new_counter = NULL; | |
539 | app->event_notifier_group.nr_counter_cpu = entry->nr_counter_cpu_fds; | |
540 | app->event_notifier_group.counter_cpu = cpu_counters; | |
541 | cpu_counters = NULL; | |
542 | goto end; | |
543 | ||
533a90fb FD |
544 | error_send_cpu_counter_data: |
545 | error_duplicate_cpu_counter: | |
546 | /* Teardown any duplicated cpu counters. */ | |
547 | for (i = 0; i < entry->nr_counter_cpu_fds; i++) { | |
548 | if (!cpu_counters[i]) { | |
549 | /* | |
550 | * Early-exit when error occurred before all cpu | |
551 | * counters could be initialized. | |
552 | */ | |
553 | break; | |
554 | } | |
555 | ||
556 | ustctl_release_object(-1, cpu_counters[i]); | |
557 | free(cpu_counters[i]); | |
558 | } | |
559 | ||
a55f8ad1 JG |
560 | free(cpu_counters); |
561 | ||
5d650dcd | 562 | error_allocate_cpu_counters: |
533a90fb FD |
563 | error_send_counter_data: |
564 | ustctl_release_object(-1, new_counter); | |
565 | free(new_counter); | |
566 | end: | |
567 | rcu_read_unlock(); | |
568 | return status; | |
569 | } | |
570 | ||
571 | enum event_notifier_error_accounting_status | |
572 | event_notifier_error_accounting_unregister_app(struct ust_app *app) | |
573 | { | |
574 | enum event_notifier_error_accounting_status status; | |
761ffce2 | 575 | struct ust_error_accounting_entry *entry; |
533a90fb FD |
576 | int i; |
577 | ||
578 | rcu_read_lock(); | |
579 | entry = get_uid_accounting_entry(app); | |
580 | if (entry == NULL) { | |
581 | ERR("Failed to find event notitifier error accounting entry on application teardown: pid = %d, application name = '%s'", | |
582 | app->pid, app->name); | |
583 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; | |
584 | goto end; | |
585 | } | |
586 | ||
587 | for (i = 0; i < app->event_notifier_group.nr_counter_cpu; i++) { | |
588 | ustctl_release_object(app->sock, | |
589 | app->event_notifier_group.counter_cpu[i]); | |
590 | free(app->event_notifier_group.counter_cpu[i]); | |
591 | } | |
592 | ||
593 | free(app->event_notifier_group.counter_cpu); | |
594 | ||
595 | ustctl_release_object(app->sock, app->event_notifier_group.counter); | |
596 | free(app->event_notifier_group.counter); | |
597 | ||
598 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; | |
599 | end: | |
600 | rcu_read_unlock(); | |
601 | return status; | |
602 | } | |
603 | ||
604 | static | |
605 | enum event_notifier_error_accounting_status | |
606 | event_notifier_error_accounting_ust_get_count( | |
607 | const struct lttng_trigger *trigger, uint64_t *count) | |
608 | { | |
609 | struct lttng_ht_iter iter; | |
761ffce2 | 610 | struct ust_error_accounting_entry *uid_entry; |
533a90fb FD |
611 | uint64_t error_counter_index, global_sum = 0; |
612 | enum event_notifier_error_accounting_status status; | |
613 | size_t dimension_indexes[1]; | |
614 | const uint64_t tracer_token = lttng_trigger_get_tracer_token(trigger); | |
761ffce2 FD |
615 | uid_t trigger_owner_uid; |
616 | const char *trigger_name; | |
533a90fb | 617 | |
533a90fb FD |
618 | |
619 | rcu_read_lock(); | |
620 | ||
761ffce2 FD |
621 | get_trigger_info_for_log(trigger, &trigger_name, &trigger_owner_uid); |
622 | ||
623 | /* | |
624 | * At the moment, the error counter index is domain wide. This means | |
625 | * that if UID 1000 registers a event notifier and is allocated index 0 | |
626 | * in it's error counter, index zero will be unused in error counter of | |
627 | * all other users. | |
628 | */ | |
533a90fb | 629 | status = get_error_counter_index_for_token( |
761ffce2 | 630 | &ust_state, |
533a90fb FD |
631 | tracer_token, |
632 | &error_counter_index); | |
633 | if (status != EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK) { | |
533a90fb FD |
634 | |
635 | ERR("Failed to retrieve index for tracer token: token = %" PRIu64 ", trigger name = '%s', trigger owner uid = %d, status = %s", | |
636 | tracer_token, trigger_name, | |
637 | (int) trigger_owner_uid, | |
638 | error_accounting_status_str(status)); | |
639 | goto end; | |
640 | } | |
641 | ||
642 | dimension_indexes[0] = error_counter_index; | |
643 | ||
761ffce2 FD |
644 | /* |
645 | * Iterate over all the UID entries. | |
646 | * We aggregate the value of all uid entries regardless of if the uid | |
647 | * matches the trigger's uid because a user that is allowed to register | |
648 | * a trigger to a given sessiond is also allowed to create an event | |
649 | * notifier on all apps that this sessiond is aware of. | |
650 | */ | |
533a90fb FD |
651 | cds_lfht_for_each_entry(error_counter_uid_ht->ht, &iter.iter, |
652 | uid_entry, node.node) { | |
653 | int ret; | |
654 | int64_t local_value = 0; | |
655 | bool overflow = false, underflow = false; | |
656 | ||
657 | ret = ustctl_counter_aggregate(uid_entry->daemon_counter, | |
658 | dimension_indexes, &local_value, &overflow, | |
659 | &underflow); | |
660 | if (ret || local_value < 0) { | |
533a90fb FD |
661 | if (ret) { |
662 | ERR("Failed to aggregate event notifier error counter values of trigger: trigger name = '%s', trigger owner uid = %d", | |
663 | trigger_name, | |
664 | (int) trigger_owner_uid); | |
665 | } else if (local_value < 0) { | |
666 | ERR("Negative event notifier error counter value encountered during aggregation: trigger name = '%s', trigger owner uid = %d, value = %" PRId64, | |
667 | trigger_name, | |
668 | (int) trigger_owner_uid, | |
669 | local_value); | |
670 | } else { | |
671 | abort(); | |
672 | } | |
673 | ||
674 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; | |
675 | goto end; | |
676 | } | |
677 | ||
678 | /* Cast is safe as negative values are checked-for above. */ | |
679 | global_sum += (uint64_t) local_value; | |
533a90fb FD |
680 | } |
681 | ||
682 | *count = global_sum; | |
683 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; | |
684 | ||
685 | end: | |
686 | rcu_read_unlock(); | |
687 | return status; | |
688 | } | |
689 | ||
690 | static | |
691 | enum event_notifier_error_accounting_status event_notifier_error_accounting_ust_clear( | |
692 | const struct lttng_trigger *trigger) | |
693 | { | |
694 | struct lttng_ht_iter iter; | |
761ffce2 | 695 | struct ust_error_accounting_entry *uid_entry; |
533a90fb FD |
696 | uint64_t error_counter_index; |
697 | enum event_notifier_error_accounting_status status; | |
698 | size_t dimension_index; | |
699 | const uint64_t tracer_token = lttng_trigger_get_tracer_token(trigger); | |
700 | ||
701 | /* | |
702 | * Go over all error counters (ignoring uid) as a trigger (and trigger | |
703 | * errors) can be generated from any applications that this session | |
704 | * daemon is managing. | |
705 | */ | |
706 | ||
707 | rcu_read_lock(); | |
708 | status = get_error_counter_index_for_token( | |
761ffce2 | 709 | &ust_state, |
533a90fb FD |
710 | tracer_token, |
711 | &error_counter_index); | |
712 | if (status != EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK) { | |
713 | uid_t trigger_owner_uid; | |
714 | const char *trigger_name; | |
715 | ||
716 | get_trigger_info_for_log(trigger, &trigger_name, | |
717 | &trigger_owner_uid); | |
718 | ||
719 | ERR("Failed to retrieve index for tracer token: token = %" PRIu64 ", trigger name = '%s', trigger owner uid = %d, status = %s", | |
720 | tracer_token, trigger_name, | |
721 | (int) trigger_owner_uid, | |
722 | error_accounting_status_str(status)); | |
723 | goto end; | |
724 | } | |
725 | ||
726 | dimension_index = error_counter_index; | |
727 | ||
728 | cds_lfht_for_each_entry(error_counter_uid_ht->ht, &iter.iter, | |
729 | uid_entry, node.node) { | |
730 | const int ret = ustctl_counter_clear(uid_entry->daemon_counter, | |
731 | &dimension_index); | |
732 | ||
733 | if (ret) { | |
734 | uid_t trigger_owner_uid; | |
735 | const char *trigger_name; | |
736 | ||
737 | get_trigger_info_for_log(trigger, &trigger_name, | |
738 | &trigger_owner_uid); | |
739 | ERR("Failed to clear event notifier counter value for trigger: counter uid = %d, trigger name = '%s', trigger owner uid = %d", | |
740 | (int) uid_entry->node.key, trigger_name, | |
741 | (int) trigger_owner_uid); | |
742 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; | |
743 | goto end; | |
744 | } | |
745 | } | |
746 | ||
747 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; | |
748 | end: | |
749 | rcu_read_unlock(); | |
750 | return status; | |
751 | } | |
752 | #endif /* HAVE_LIBLTTNG_UST_CTL */ | |
753 | ||
90aa04a1 FD |
754 | static |
755 | enum event_notifier_error_accounting_status | |
756 | event_notifier_error_accounting_kernel_clear( | |
757 | const struct lttng_trigger *trigger) | |
758 | { | |
759 | int ret; | |
760 | uint64_t error_counter_index; | |
761 | enum event_notifier_error_accounting_status status; | |
762 | struct lttng_kernel_counter_clear counter_clear = {}; | |
763 | ||
764 | status = get_error_counter_index_for_token( | |
761ffce2 | 765 | &kernel_state, |
90aa04a1 FD |
766 | lttng_trigger_get_tracer_token(trigger), |
767 | &error_counter_index); | |
768 | if (status != EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK) { | |
769 | uid_t trigger_owner_uid; | |
770 | const char *trigger_name; | |
90aa04a1 | 771 | |
533a90fb FD |
772 | get_trigger_info_for_log( |
773 | trigger, &trigger_name, &trigger_owner_uid); | |
774 | ||
775 | ERR("Failed to get event notifier error counter index: trigger owner uid = %d, trigger name = '%s', status = '%s'", | |
776 | trigger_owner_uid, trigger_name, | |
777 | error_accounting_status_str(status)); | |
90aa04a1 FD |
778 | goto end; |
779 | } | |
780 | ||
781 | counter_clear.index.number_dimensions = 1; | |
782 | counter_clear.index.dimension_indexes[0] = error_counter_index; | |
783 | ||
784 | ret = kernctl_counter_clear( | |
785 | kernel_error_accountant.kernel_event_notifier_error_counter_fd, | |
786 | &counter_clear); | |
787 | if (ret) { | |
533a90fb FD |
788 | uid_t trigger_owner_uid; |
789 | const char *trigger_name; | |
790 | ||
791 | get_trigger_info_for_log( | |
792 | trigger, &trigger_name, &trigger_owner_uid); | |
793 | ||
794 | ERR("Failed to clear kernel event notifier error counter: trigger owner uid = %d, trigger name = '%s'", | |
795 | trigger_owner_uid, trigger_name); | |
90aa04a1 FD |
796 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; |
797 | goto end; | |
798 | } | |
799 | ||
800 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; | |
801 | end: | |
802 | return status; | |
803 | } | |
804 | ||
805 | enum event_notifier_error_accounting_status | |
806 | event_notifier_error_accounting_register_kernel( | |
807 | int kernel_event_notifier_group_fd) | |
808 | { | |
809 | int error_counter_fd = -1, ret; | |
810 | enum event_notifier_error_accounting_status status; | |
811 | const struct lttng_kernel_counter_conf error_counter_conf = { | |
812 | .arithmetic = LTTNG_KERNEL_COUNTER_ARITHMETIC_MODULAR, | |
813 | .bitness = sizeof(void *) == sizeof(uint32_t) ? | |
814 | LTTNG_KERNEL_COUNTER_BITNESS_32 : | |
815 | LTTNG_KERNEL_COUNTER_BITNESS_64, | |
816 | .global_sum_step = 0, | |
817 | .number_dimensions = 1, | |
761ffce2 | 818 | .dimensions[0].size = kernel_state.number_indices, |
90aa04a1 FD |
819 | .dimensions[0].has_underflow = false, |
820 | .dimensions[0].has_overflow = false, | |
821 | }; | |
822 | ||
823 | ret = kernctl_create_event_notifier_group_error_counter( | |
824 | kernel_event_notifier_group_fd, &error_counter_conf); | |
825 | if (ret < 0) { | |
826 | PERROR("Failed to create event notifier group error counter through kernel ioctl: kernel_event_notifier_group_fd = %d", | |
827 | kernel_event_notifier_group_fd); | |
828 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; | |
829 | goto error; | |
830 | } | |
831 | ||
832 | error_counter_fd = ret; | |
833 | ||
834 | /* Prevent fd duplication after execlp(). */ | |
835 | ret = fcntl(error_counter_fd, F_SETFD, FD_CLOEXEC); | |
836 | if (ret < 0) { | |
837 | PERROR("Failed to set FD_CLOEXEC flag on event notifier error counter file descriptor: error_counter_fd = %d", | |
838 | error_counter_fd); | |
839 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; | |
840 | goto error; | |
841 | } | |
842 | ||
843 | DBG("Created kernel event notifier group error counter: fd = %d", | |
844 | error_counter_fd); | |
845 | ||
846 | kernel_error_accountant.kernel_event_notifier_error_counter_fd = | |
847 | error_counter_fd; | |
848 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; | |
849 | ||
850 | error: | |
851 | return status; | |
852 | } | |
853 | ||
854 | static | |
855 | enum event_notifier_error_accounting_status create_error_counter_index_for_token( | |
761ffce2 FD |
856 | struct error_accounting_state *state, uint64_t tracer_token, |
857 | uint64_t *error_counter_index) | |
90aa04a1 FD |
858 | { |
859 | struct index_ht_entry *index_entry; | |
860 | enum lttng_index_allocator_status index_alloc_status; | |
861 | uint64_t local_error_counter_index; | |
862 | enum event_notifier_error_accounting_status status; | |
863 | ||
761ffce2 FD |
864 | assert(state); |
865 | ||
90aa04a1 | 866 | /* Allocate a new index for that counter. */ |
761ffce2 | 867 | index_alloc_status = lttng_index_allocator_alloc(state->index_allocator, |
90aa04a1 FD |
868 | &local_error_counter_index); |
869 | switch (index_alloc_status) { | |
870 | case LTTNG_INDEX_ALLOCATOR_STATUS_EMPTY: | |
871 | DBG("No indices left in the configured event notifier error counter: " | |
872 | "number-of-indices = %"PRIu64, | |
873 | lttng_index_allocator_get_index_count( | |
761ffce2 | 874 | state->index_allocator)); |
90aa04a1 FD |
875 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NO_INDEX_AVAILABLE; |
876 | goto end; | |
877 | case LTTNG_INDEX_ALLOCATOR_STATUS_OK: | |
878 | break; | |
879 | default: | |
880 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; | |
881 | goto end; | |
882 | } | |
883 | ||
884 | index_entry = zmalloc(sizeof(*index_entry)); | |
885 | if (index_entry == NULL) { | |
886 | PERROR("Failed to allocate event notifier error counter hash table entry"); | |
887 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NOMEM; | |
888 | goto end; | |
889 | } | |
890 | ||
891 | index_entry->error_counter_index = local_error_counter_index; | |
892 | lttng_ht_node_init_u64(&index_entry->node, tracer_token); | |
761ffce2 | 893 | lttng_ht_add_unique_u64(state->indices_ht, &index_entry->node); |
90aa04a1 FD |
894 | |
895 | DBG("Allocated error counter index for tracer token: tracer token = %" PRIu64 ", index = %" PRIu64, | |
896 | tracer_token, local_error_counter_index); | |
897 | *error_counter_index = local_error_counter_index; | |
898 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; | |
899 | end: | |
900 | return status; | |
901 | } | |
902 | ||
903 | enum event_notifier_error_accounting_status | |
904 | event_notifier_error_accounting_register_event_notifier( | |
905 | const struct lttng_trigger *trigger, | |
906 | uint64_t *error_counter_index) | |
907 | { | |
908 | enum event_notifier_error_accounting_status status; | |
909 | uint64_t local_error_counter_index; | |
761ffce2 FD |
910 | struct error_accounting_state *state; |
911 | ||
912 | switch (lttng_trigger_get_underlying_domain_type_restriction(trigger)) { | |
913 | case LTTNG_DOMAIN_KERNEL: | |
914 | state = &kernel_state; | |
915 | break; | |
916 | case LTTNG_DOMAIN_UST: | |
917 | state = &ust_state; | |
918 | break; | |
919 | default: | |
920 | abort(); | |
921 | } | |
90aa04a1 FD |
922 | |
923 | /* | |
924 | * Check if this event notifier already has a error counter index | |
925 | * assigned. | |
926 | */ | |
761ffce2 | 927 | status = get_error_counter_index_for_token(state, |
90aa04a1 FD |
928 | lttng_trigger_get_tracer_token(trigger), |
929 | &local_error_counter_index); | |
930 | switch (status) { | |
931 | case EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NOT_FOUND: | |
932 | { | |
933 | uid_t trigger_owner_uid; | |
934 | const char *trigger_name; | |
90aa04a1 | 935 | |
533a90fb FD |
936 | get_trigger_info_for_log( |
937 | trigger, &trigger_name, &trigger_owner_uid); | |
938 | ||
939 | 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, | |
940 | trigger_name, trigger_owner_uid, | |
90aa04a1 | 941 | lttng_trigger_get_tracer_token(trigger)); |
533a90fb | 942 | |
761ffce2 | 943 | status = create_error_counter_index_for_token(state, |
90aa04a1 FD |
944 | lttng_trigger_get_tracer_token(trigger), |
945 | &local_error_counter_index); | |
946 | if (status != EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK) { | |
533a90fb FD |
947 | ERR("Error creating index for token: status = %s, trigger name = '%s', trigger owner uid = %d", |
948 | error_accounting_status_str(status), | |
949 | trigger_name, trigger_owner_uid); | |
90aa04a1 FD |
950 | goto end; |
951 | } | |
952 | /* fall-through. */ | |
953 | } | |
954 | case EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK: | |
955 | *error_counter_index = local_error_counter_index; | |
956 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; | |
957 | break; | |
958 | default: | |
959 | break; | |
960 | } | |
961 | ||
962 | end: | |
963 | return status; | |
964 | } | |
965 | ||
966 | static | |
967 | enum event_notifier_error_accounting_status | |
968 | event_notifier_error_accounting_kernel_get_count( | |
969 | const struct lttng_trigger *trigger, uint64_t *count) | |
970 | { | |
971 | struct lttng_kernel_counter_aggregate counter_aggregate = {}; | |
972 | enum event_notifier_error_accounting_status status; | |
973 | uint64_t error_counter_index; | |
974 | int ret; | |
975 | ||
976 | status = get_error_counter_index_for_token( | |
761ffce2 FD |
977 | &kernel_state, |
978 | lttng_trigger_get_tracer_token(trigger), | |
979 | &error_counter_index); | |
90aa04a1 | 980 | if (status != EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK) { |
533a90fb FD |
981 | ERR("Error getting index for token: status=%s", |
982 | error_accounting_status_str(status)); | |
90aa04a1 FD |
983 | goto end; |
984 | } | |
985 | ||
986 | counter_aggregate.index.number_dimensions = 1; | |
987 | counter_aggregate.index.dimension_indexes[0] = error_counter_index; | |
988 | ||
989 | assert(kernel_error_accountant.kernel_event_notifier_error_counter_fd); | |
990 | ||
991 | ret = kernctl_counter_get_aggregate_value( | |
992 | kernel_error_accountant.kernel_event_notifier_error_counter_fd, | |
993 | &counter_aggregate); | |
994 | if (ret || counter_aggregate.value.value < 0) { | |
995 | uid_t trigger_owner_uid; | |
996 | const char *trigger_name; | |
533a90fb FD |
997 | |
998 | get_trigger_info_for_log(trigger, &trigger_name, | |
999 | &trigger_owner_uid); | |
90aa04a1 FD |
1000 | |
1001 | if (counter_aggregate.value.value < 0) { | |
1002 | ERR("Invalid negative event notifier error counter value: trigger owner = %d, trigger name = '%s', value = %" PRId64, | |
1003 | trigger_owner_uid, trigger_name, | |
1004 | counter_aggregate.value.value); | |
1005 | } else { | |
1006 | ERR("Failed to getting event notifier error count: trigger owner = %d, trigger name = '%s', ret = %d", | |
1007 | trigger_owner_uid, trigger_name, ret); | |
1008 | } | |
1009 | ||
1010 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; | |
1011 | goto end; | |
1012 | } | |
1013 | ||
1014 | /* Error count can't be negative. */ | |
1015 | assert(counter_aggregate.value.value >= 0); | |
1016 | *count = (uint64_t) counter_aggregate.value.value; | |
1017 | ||
1018 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; | |
1019 | ||
1020 | end: | |
1021 | return status; | |
1022 | } | |
1023 | ||
1024 | enum event_notifier_error_accounting_status | |
1025 | event_notifier_error_accounting_get_count( | |
1026 | const struct lttng_trigger *trigger, uint64_t *count) | |
1027 | { | |
1028 | switch (lttng_trigger_get_underlying_domain_type_restriction(trigger)) { | |
1029 | case LTTNG_DOMAIN_KERNEL: | |
1030 | return event_notifier_error_accounting_kernel_get_count( | |
1031 | trigger, count); | |
1032 | case LTTNG_DOMAIN_UST: | |
533a90fb | 1033 | #ifdef HAVE_LIBLTTNG_UST_CTL |
761ffce2 FD |
1034 | return event_notifier_error_accounting_ust_get_count(trigger, |
1035 | count); | |
533a90fb | 1036 | #else |
90aa04a1 | 1037 | return EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; |
533a90fb | 1038 | #endif /* HAVE_LIBLTTNG_UST_CTL */ |
90aa04a1 FD |
1039 | default: |
1040 | abort(); | |
1041 | } | |
1042 | } | |
1043 | ||
1044 | static | |
1045 | enum event_notifier_error_accounting_status | |
1046 | event_notifier_error_accounting_clear(const struct lttng_trigger *trigger) | |
1047 | { | |
1048 | switch (lttng_trigger_get_underlying_domain_type_restriction(trigger)) { | |
1049 | case LTTNG_DOMAIN_KERNEL: | |
1050 | return event_notifier_error_accounting_kernel_clear(trigger); | |
1051 | case LTTNG_DOMAIN_UST: | |
533a90fb FD |
1052 | #ifdef HAVE_LIBLTTNG_UST_CTL |
1053 | return event_notifier_error_accounting_ust_clear(trigger); | |
1054 | #else | |
90aa04a1 | 1055 | return EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; |
533a90fb | 1056 | #endif /* HAVE_LIBLTTNG_UST_CTL */ |
90aa04a1 FD |
1057 | default: |
1058 | abort(); | |
1059 | } | |
1060 | } | |
1061 | ||
1062 | static void free_index_ht_entry(struct rcu_head *head) | |
1063 | { | |
1064 | struct index_ht_entry *entry = caa_container_of(head, | |
1065 | struct index_ht_entry, rcu_head); | |
1066 | ||
1067 | free(entry); | |
1068 | } | |
1069 | ||
1070 | void event_notifier_error_accounting_unregister_event_notifier( | |
1071 | const struct lttng_trigger *trigger) | |
1072 | { | |
1073 | struct lttng_ht_iter iter; | |
1074 | struct lttng_ht_node_u64 *node; | |
533a90fb | 1075 | const uint64_t tracer_token = lttng_trigger_get_tracer_token(trigger); |
90aa04a1 | 1076 | enum event_notifier_error_accounting_status status; |
761ffce2 | 1077 | struct error_accounting_state *state; |
90aa04a1 FD |
1078 | |
1079 | status = event_notifier_error_accounting_clear(trigger); | |
1080 | if (status != EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK) { | |
533a90fb FD |
1081 | /* Trigger details already logged by callee on error. */ |
1082 | ERR("Failed to clear event notifier error counter during unregistration of event notifier: status = '%s'", | |
1083 | error_accounting_status_str(status)); | |
90aa04a1 FD |
1084 | } |
1085 | ||
761ffce2 FD |
1086 | switch (lttng_trigger_get_underlying_domain_type_restriction(trigger)) { |
1087 | case LTTNG_DOMAIN_KERNEL: | |
1088 | state = &kernel_state; | |
1089 | break; | |
1090 | case LTTNG_DOMAIN_UST: | |
1091 | state = &ust_state; | |
1092 | break; | |
1093 | default: | |
1094 | abort(); | |
1095 | } | |
1096 | ||
90aa04a1 | 1097 | rcu_read_lock(); |
761ffce2 | 1098 | lttng_ht_lookup(state->indices_ht, &tracer_token, &iter); |
90aa04a1 | 1099 | node = lttng_ht_iter_get_node_u64(&iter); |
533a90fb | 1100 | if (node) { |
44d0e2f1 | 1101 | int del_ret; |
533a90fb FD |
1102 | struct index_ht_entry *index_entry = caa_container_of( |
1103 | node, typeof(*index_entry), node); | |
1104 | enum lttng_index_allocator_status index_alloc_status; | |
1105 | ||
90aa04a1 | 1106 | index_alloc_status = lttng_index_allocator_release( |
761ffce2 | 1107 | state->index_allocator, |
90aa04a1 FD |
1108 | index_entry->error_counter_index); |
1109 | if (index_alloc_status != LTTNG_INDEX_ALLOCATOR_STATUS_OK) { | |
533a90fb FD |
1110 | uid_t trigger_owner_uid; |
1111 | const char *trigger_name; | |
1112 | ||
1113 | get_trigger_info_for_log(trigger, &trigger_name, | |
1114 | &trigger_owner_uid); | |
1115 | ||
1116 | ERR("Failed to release event notifier error counter index: index = %" PRIu64 ", trigger name = '%s', trigger owner uid = %d", | |
1117 | index_entry->error_counter_index, | |
1118 | trigger_name, (int) trigger_owner_uid); | |
1119 | /* Don't exit, perform the rest of the clean-up. */ | |
90aa04a1 FD |
1120 | } |
1121 | ||
761ffce2 | 1122 | del_ret = lttng_ht_del(state->indices_ht, &iter); |
44d0e2f1 | 1123 | assert(!del_ret); |
90aa04a1 FD |
1124 | call_rcu(&index_entry->rcu_head, free_index_ht_entry); |
1125 | } | |
1126 | ||
1127 | rcu_read_unlock(); | |
1128 | } | |
1129 | ||
533a90fb FD |
1130 | #ifdef HAVE_LIBLTTNG_UST_CTL |
1131 | static void free_error_account_entry(struct rcu_head *head) | |
1132 | { | |
1133 | int i; | |
761ffce2 | 1134 | struct ust_error_accounting_entry *entry = |
533a90fb FD |
1135 | caa_container_of(head, typeof(*entry), rcu_head); |
1136 | ||
1137 | for (i = 0; i < entry->nr_counter_cpu_fds; i++) { | |
1138 | ustctl_release_object(-1, entry->cpu_counters[i]); | |
1139 | free(entry->cpu_counters[i]); | |
1140 | } | |
1141 | ||
1142 | free(entry->cpu_counters); | |
1143 | ||
1144 | ustctl_release_object(-1, entry->counter); | |
1145 | free(entry->counter); | |
1146 | ||
1147 | ustctl_destroy_counter(entry->daemon_counter); | |
1148 | ||
1149 | free(entry); | |
1150 | } | |
1151 | #else | |
1152 | /* Not called without UST support. */ | |
1153 | static void free_error_account_entry(struct rcu_head *head) {} | |
1154 | #endif /* HAVE_LIBLTTNG_UST_CTL */ | |
1155 | ||
90aa04a1 FD |
1156 | void event_notifier_error_accounting_fini(void) |
1157 | { | |
533a90fb | 1158 | struct lttng_ht_iter iter; |
761ffce2 | 1159 | struct ust_error_accounting_entry *uid_entry; |
90aa04a1 FD |
1160 | |
1161 | if (kernel_error_accountant.kernel_event_notifier_error_counter_fd) { | |
1162 | const int ret = close(kernel_error_accountant.kernel_event_notifier_error_counter_fd); | |
1163 | ||
1164 | if (ret) { | |
1165 | PERROR("Failed to close kernel event notifier error counter"); | |
1166 | } | |
1167 | } | |
1168 | ||
1169 | /* | |
533a90fb FD |
1170 | * FIXME error account entries are not reference-counted and torn |
1171 | * down on last use. They exist from the moment of their first use | |
1172 | * up until the teardown of the session daemon. | |
1173 | */ | |
1174 | rcu_read_lock(); | |
1175 | cds_lfht_for_each_entry(error_counter_uid_ht->ht, &iter.iter, | |
1176 | uid_entry, node.node) { | |
1177 | cds_lfht_del(error_counter_uid_ht->ht, &uid_entry->node.node); | |
1178 | call_rcu(&uid_entry->rcu_head, free_error_account_entry); | |
1179 | } | |
1180 | rcu_read_unlock(); | |
761ffce2 | 1181 | |
533a90fb FD |
1182 | lttng_ht_destroy(error_counter_uid_ht); |
1183 | ||
761ffce2 FD |
1184 | fini_error_accounting_state(&kernel_state); |
1185 | fini_error_accounting_state(&ust_state); | |
90aa04a1 | 1186 | } |