Commit | Line | Data |
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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 | ||
28ab034a JG |
8 | #include "event-notifier-error-accounting.hpp" |
9 | #include "lttng-ust-error.hpp" | |
10 | #include "ust-app.hpp" | |
90aa04a1 | 11 | |
c9e313bc SM |
12 | #include <common/error.hpp> |
13 | #include <common/hashtable/hashtable.hpp> | |
14 | #include <common/index-allocator.hpp> | |
15 | #include <common/kernel-ctl/kernel-ctl.hpp> | |
16 | #include <common/shm.hpp> | |
56047f5a | 17 | #include <common/urcu.hpp> |
28ab034a | 18 | |
c9e313bc | 19 | #include <lttng/trigger/trigger-internal.hpp> |
90aa04a1 | 20 | |
28ab034a JG |
21 | #include <fcntl.h> |
22 | #include <pthread.h> | |
23 | #include <sys/mman.h> | |
24 | #include <sys/stat.h> | |
25 | #include <unistd.h> | |
26 | #include <urcu/compiler.h> | |
90aa04a1 FD |
27 | |
28 | #define ERROR_COUNTER_INDEX_HT_INITIAL_SIZE 16 | |
29 | ||
f1494934 | 30 | namespace { |
90aa04a1 FD |
31 | struct index_ht_entry { |
32 | struct lttng_ht_node_u64 node; | |
33 | uint64_t error_counter_index; | |
34 | struct rcu_head rcu_head; | |
35 | }; | |
36 | ||
761ffce2 FD |
37 | struct ust_error_accounting_entry { |
38 | uid_t uid; | |
a5a21280 | 39 | struct urcu_ref ref; |
533a90fb FD |
40 | struct lttng_ht_node_u64 node; |
41 | struct rcu_head rcu_head; | |
b623cb6a | 42 | struct lttng_ust_ctl_daemon_counter *daemon_counter; |
533a90fb | 43 | /* |
a5a21280 FD |
44 | * Those `lttng_ust_abi_object_data` are anonymous handles to the |
45 | * counters objects. | |
533a90fb FD |
46 | * They are only used to be duplicated for each new applications of the |
47 | * user. To destroy them, call with the `sock` parameter set to -1. | |
b623cb6a | 48 | * e.g. `lttng_ust_ctl_release_object(-1, data)`; |
533a90fb FD |
49 | */ |
50 | struct lttng_ust_abi_object_data *counter; | |
51 | struct lttng_ust_abi_object_data **cpu_counters; | |
52 | int nr_counter_cpu_fds; | |
53 | }; | |
54 | ||
761ffce2 | 55 | struct kernel_error_accounting_entry { |
a5a21280 | 56 | int error_counter_fd; |
90aa04a1 FD |
57 | }; |
58 | ||
f1494934 | 59 | struct kernel_error_accounting_entry kernel_error_accounting_entry; |
90aa04a1 | 60 | |
533a90fb | 61 | /* Hashtable mapping uid to error_account_entry. */ |
f1494934 | 62 | struct lttng_ht *error_counter_uid_ht; |
533a90fb | 63 | |
761ffce2 FD |
64 | struct error_accounting_state { |
65 | struct lttng_index_allocator *index_allocator; | |
66 | /* Hashtable mapping event notifier token to index_ht_entry. */ | |
67 | struct lttng_ht *indices_ht; | |
68 | uint64_t number_indices; | |
69 | }; | |
70 | ||
f1494934 JG |
71 | struct error_accounting_state ust_state; |
72 | struct error_accounting_state kernel_state; | |
73 | } /* namespace */ | |
90aa04a1 | 74 | |
533a90fb | 75 | static inline void get_trigger_info_for_log(const struct lttng_trigger *trigger, |
28ab034a JG |
76 | const char **trigger_name, |
77 | uid_t *trigger_owner_uid) | |
533a90fb FD |
78 | { |
79 | enum lttng_trigger_status trigger_status; | |
80 | ||
81 | trigger_status = lttng_trigger_get_name(trigger, trigger_name); | |
82 | switch (trigger_status) { | |
83 | case LTTNG_TRIGGER_STATUS_OK: | |
84 | break; | |
85 | case LTTNG_TRIGGER_STATUS_UNSET: | |
0efb2ad7 | 86 | *trigger_name = "(anonymous)"; |
533a90fb FD |
87 | break; |
88 | default: | |
89 | abort(); | |
90 | } | |
91 | ||
28ab034a | 92 | trigger_status = lttng_trigger_get_owner_uid(trigger, trigger_owner_uid); |
a0377dfe | 93 | LTTNG_ASSERT(trigger_status == LTTNG_TRIGGER_STATUS_OK); |
533a90fb FD |
94 | } |
95 | ||
28ab034a JG |
96 | static inline const char * |
97 | error_accounting_status_str(enum event_notifier_error_accounting_status status) | |
90aa04a1 FD |
98 | { |
99 | switch (status) { | |
100 | case EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK: | |
101 | return "OK"; | |
102 | case EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR: | |
103 | return "ERROR"; | |
104 | case EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NOT_FOUND: | |
105 | return "NOT_FOUND"; | |
106 | case EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NOMEM: | |
107 | return "NOMEM"; | |
108 | case EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NO_INDEX_AVAILABLE: | |
109 | return "NO_INDEX_AVAILABLE"; | |
533a90fb FD |
110 | case EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_APP_DEAD: |
111 | return "APP_DEAD"; | |
90aa04a1 FD |
112 | default: |
113 | abort(); | |
114 | } | |
115 | } | |
116 | ||
a5a21280 | 117 | #ifdef HAVE_LIBLTTNG_UST_CTL |
f1494934 | 118 | namespace { |
a5a21280 FD |
119 | struct event_notifier_counter { |
120 | pthread_mutex_t lock; | |
121 | long count; | |
122 | }; | |
123 | ||
f1494934 JG |
124 | struct event_notifier_counter the_event_notifier_counter; |
125 | } /* namespace */ | |
a5a21280 FD |
126 | |
127 | static void free_ust_error_accounting_entry(struct rcu_head *head) | |
128 | { | |
129 | int i; | |
130 | struct ust_error_accounting_entry *entry = | |
28ab034a | 131 | lttng::utils::container_of(head, &ust_error_accounting_entry::rcu_head); |
a5a21280 FD |
132 | |
133 | for (i = 0; i < entry->nr_counter_cpu_fds; i++) { | |
b623cb6a | 134 | lttng_ust_ctl_release_object(-1, entry->cpu_counters[i]); |
a5a21280 FD |
135 | free(entry->cpu_counters[i]); |
136 | } | |
137 | ||
138 | free(entry->cpu_counters); | |
139 | ||
b623cb6a | 140 | lttng_ust_ctl_release_object(-1, entry->counter); |
a5a21280 FD |
141 | free(entry->counter); |
142 | ||
b623cb6a | 143 | lttng_ust_ctl_destroy_counter(entry->daemon_counter); |
a5a21280 FD |
144 | |
145 | free(entry); | |
146 | } | |
147 | ||
28ab034a | 148 | static bool ust_error_accounting_entry_get(struct ust_error_accounting_entry *entry) |
a5a21280 FD |
149 | { |
150 | return urcu_ref_get_unless_zero(&entry->ref); | |
151 | } | |
152 | ||
28ab034a | 153 | static void ust_error_accounting_entry_release(struct urcu_ref *entry_ref) |
a5a21280 FD |
154 | { |
155 | struct ust_error_accounting_entry *entry = | |
28ab034a | 156 | lttng::utils::container_of(entry_ref, &ust_error_accounting_entry::ref); |
a5a21280 | 157 | |
56047f5a | 158 | lttng::urcu::read_lock_guard read_lock; |
a5a21280 FD |
159 | cds_lfht_del(error_counter_uid_ht->ht, &entry->node.node); |
160 | call_rcu(&entry->rcu_head, free_ust_error_accounting_entry); | |
a5a21280 FD |
161 | } |
162 | ||
28ab034a | 163 | static void ust_error_accounting_entry_put(struct ust_error_accounting_entry *entry) |
a5a21280 FD |
164 | { |
165 | if (!entry) { | |
166 | return; | |
167 | } | |
168 | ||
169 | urcu_ref_put(&entry->ref, ust_error_accounting_entry_release); | |
170 | } | |
171 | ||
172 | /* | |
173 | * Put one reference to every UID entries. | |
174 | */ | |
cd9adb8b | 175 | static void put_ref_all_ust_error_accounting_entry() |
a5a21280 FD |
176 | { |
177 | struct lttng_ht_iter iter; | |
178 | struct ust_error_accounting_entry *uid_entry; | |
179 | ||
180 | ASSERT_LOCKED(the_event_notifier_counter.lock); | |
181 | ||
56047f5a JG |
182 | { |
183 | lttng::urcu::read_lock_guard read_lock; | |
a5a21280 | 184 | |
56047f5a JG |
185 | cds_lfht_for_each_entry ( |
186 | error_counter_uid_ht->ht, &iter.iter, uid_entry, node.node) { | |
187 | ust_error_accounting_entry_put(uid_entry); | |
188 | } | |
189 | } | |
a5a21280 FD |
190 | } |
191 | ||
192 | /* | |
193 | * Get one reference to every UID entries. | |
194 | */ | |
cd9adb8b | 195 | static void get_ref_all_ust_error_accounting_entry() |
a5a21280 FD |
196 | { |
197 | struct lttng_ht_iter iter; | |
198 | struct ust_error_accounting_entry *uid_entry; | |
199 | ||
200 | ASSERT_LOCKED(the_event_notifier_counter.lock); | |
201 | ||
56047f5a JG |
202 | { |
203 | lttng::urcu::read_lock_guard read_lock; | |
a5a21280 | 204 | |
56047f5a JG |
205 | cds_lfht_for_each_entry ( |
206 | error_counter_uid_ht->ht, &iter.iter, uid_entry, node.node) { | |
207 | ust_error_accounting_entry_get(uid_entry); | |
208 | } | |
209 | } | |
a5a21280 FD |
210 | } |
211 | ||
212 | #endif /* HAVE_LIBLTTNG_UST_CTL */ | |
213 | ||
28ab034a JG |
214 | static enum event_notifier_error_accounting_status |
215 | init_error_accounting_state(struct error_accounting_state *state, uint64_t index_count) | |
90aa04a1 FD |
216 | { |
217 | enum event_notifier_error_accounting_status status; | |
218 | ||
a0377dfe | 219 | LTTNG_ASSERT(state); |
761ffce2 FD |
220 | |
221 | state->number_indices = index_count; | |
222 | ||
223 | state->index_allocator = lttng_index_allocator_create(index_count); | |
224 | if (!state->index_allocator) { | |
225 | ERR("Failed to allocate event notifier error counter index allocator"); | |
90aa04a1 | 226 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NOMEM; |
761ffce2 | 227 | goto end; |
90aa04a1 FD |
228 | } |
229 | ||
28ab034a | 230 | state->indices_ht = lttng_ht_new(ERROR_COUNTER_INDEX_HT_INITIAL_SIZE, LTTNG_HT_TYPE_U64); |
761ffce2 | 231 | if (!state->indices_ht) { |
533a90fb FD |
232 | ERR("Failed to allocate error counter indices hash table"); |
233 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NOMEM; | |
761ffce2 FD |
234 | goto error_indices_ht; |
235 | } | |
236 | ||
237 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; | |
238 | goto end; | |
239 | ||
240 | error_indices_ht: | |
241 | lttng_index_allocator_destroy(state->index_allocator); | |
cd9adb8b | 242 | state->index_allocator = nullptr; |
761ffce2 FD |
243 | end: |
244 | return status; | |
245 | } | |
246 | ||
28ab034a | 247 | static void fini_error_accounting_state(struct error_accounting_state *state) |
761ffce2 | 248 | { |
a0377dfe | 249 | LTTNG_ASSERT(state); |
761ffce2 FD |
250 | |
251 | /* | |
252 | * Will assert if some error counter indices were not released (an | |
253 | * internal error). | |
254 | */ | |
255 | lttng_ht_destroy(state->indices_ht); | |
256 | lttng_index_allocator_destroy(state->index_allocator); | |
257 | } | |
258 | ||
259 | enum event_notifier_error_accounting_status | |
28ab034a | 260 | event_notifier_error_accounting_init(uint64_t buffer_size_kernel, uint64_t buffer_size_ust) |
761ffce2 FD |
261 | { |
262 | enum event_notifier_error_accounting_status status; | |
263 | ||
264 | status = init_error_accounting_state(&kernel_state, buffer_size_kernel); | |
265 | if (status != EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK) { | |
266 | ERR("Failed to initialize kernel event notifier accounting state: status = %s", | |
28ab034a | 267 | error_accounting_status_str(status)); |
761ffce2 FD |
268 | goto end; |
269 | } | |
270 | ||
271 | status = init_error_accounting_state(&ust_state, buffer_size_ust); | |
272 | if (status != EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK) { | |
273 | ERR("Failed to initialize UST event notifier accounting state: status = %s", | |
28ab034a | 274 | error_accounting_status_str(status)); |
761ffce2 | 275 | goto error_ust_state; |
533a90fb FD |
276 | } |
277 | ||
28ab034a | 278 | error_counter_uid_ht = lttng_ht_new(ERROR_COUNTER_INDEX_HT_INITIAL_SIZE, LTTNG_HT_TYPE_U64); |
533a90fb FD |
279 | if (!error_counter_uid_ht) { |
280 | ERR("Failed to allocate UID to error counter accountant hash table"); | |
90aa04a1 | 281 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NOMEM; |
761ffce2 | 282 | goto error_uid_ht; |
90aa04a1 FD |
283 | } |
284 | ||
90aa04a1 | 285 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; |
761ffce2 | 286 | goto end; |
90aa04a1 | 287 | |
761ffce2 FD |
288 | error_uid_ht: |
289 | fini_error_accounting_state(&ust_state); | |
290 | error_ust_state: | |
291 | fini_error_accounting_state(&kernel_state); | |
292 | end: | |
90aa04a1 FD |
293 | return status; |
294 | } | |
295 | ||
a5a21280 FD |
296 | /* |
297 | * Return the error counteur index associated to this event notifier tracer | |
298 | * token. Returns _STATUS_OK if found and _STATUS_NOT_FOUND otherwise. | |
299 | */ | |
28ab034a JG |
300 | static enum event_notifier_error_accounting_status get_error_counter_index_for_token( |
301 | struct error_accounting_state *state, uint64_t tracer_token, uint64_t *error_counter_index) | |
90aa04a1 FD |
302 | { |
303 | struct lttng_ht_node_u64 *node; | |
304 | struct lttng_ht_iter iter; | |
305 | const struct index_ht_entry *index_entry; | |
306 | enum event_notifier_error_accounting_status status; | |
56047f5a | 307 | lttng::urcu::read_lock_guard read_guard; |
90aa04a1 | 308 | |
761ffce2 | 309 | lttng_ht_lookup(state->indices_ht, &tracer_token, &iter); |
90aa04a1 FD |
310 | node = lttng_ht_iter_get_node_u64(&iter); |
311 | if (node) { | |
0114db0e | 312 | index_entry = lttng::utils::container_of(node, &index_ht_entry::node); |
90aa04a1 FD |
313 | *error_counter_index = index_entry->error_counter_index; |
314 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; | |
315 | } else { | |
316 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NOT_FOUND; | |
317 | } | |
318 | ||
90aa04a1 FD |
319 | return status; |
320 | } | |
321 | ||
533a90fb | 322 | #ifdef HAVE_LIBLTTNG_UST_CTL |
a5a21280 FD |
323 | /* |
324 | * Find the entry for this app's UID, the caller acquires a reference if the | |
325 | * entry is found. | |
326 | */ | |
28ab034a JG |
327 | static struct ust_error_accounting_entry *ust_error_accounting_entry_find(struct lttng_ht *uid_ht, |
328 | const struct ust_app *app) | |
533a90fb | 329 | { |
761ffce2 | 330 | struct ust_error_accounting_entry *entry; |
533a90fb FD |
331 | struct lttng_ht_node_u64 *node; |
332 | struct lttng_ht_iter iter; | |
333 | uint64_t key = app->uid; | |
334 | ||
a5a21280 | 335 | lttng_ht_lookup(uid_ht, &key, &iter); |
533a90fb | 336 | node = lttng_ht_iter_get_node_u64(&iter); |
cd9adb8b JG |
337 | if (node == nullptr) { |
338 | entry = nullptr; | |
533a90fb | 339 | } else { |
a5a21280 FD |
340 | bool got_ref; |
341 | ||
28ab034a | 342 | entry = caa_container_of(node, struct ust_error_accounting_entry, node); |
a5a21280 FD |
343 | |
344 | got_ref = ust_error_accounting_entry_get(entry); | |
345 | if (!got_ref) { | |
cd9adb8b | 346 | entry = nullptr; |
a5a21280 | 347 | } |
533a90fb FD |
348 | } |
349 | ||
350 | return entry; | |
351 | } | |
352 | ||
a5a21280 FD |
353 | /* |
354 | * Create the entry for this app's UID, the caller acquires a reference to the | |
355 | * entry, | |
356 | */ | |
28ab034a JG |
357 | static struct ust_error_accounting_entry * |
358 | ust_error_accounting_entry_create(const struct ust_app *app) | |
533a90fb | 359 | { |
cd9adb8b | 360 | int i, ret, *cpu_counter_fds = nullptr; |
b623cb6a | 361 | struct lttng_ust_ctl_daemon_counter *daemon_counter; |
533a90fb | 362 | struct lttng_ust_abi_object_data *counter, **cpu_counters; |
cd9adb8b | 363 | struct ust_error_accounting_entry *entry = nullptr; |
5728ab7d | 364 | lttng_ust_ctl_counter_dimension dimension = {}; |
7966af57 SM |
365 | |
366 | dimension.size = ust_state.number_indices; | |
367 | dimension.has_underflow = false; | |
368 | dimension.has_overflow = false; | |
533a90fb | 369 | |
783db316 MD |
370 | if (!ust_app_supports_counters(app)) { |
371 | DBG("Refusing to create accounting entry for application (unsupported feature): app name = '%s', app ppid = %d", | |
28ab034a JG |
372 | app->name, |
373 | (int) app->ppid); | |
783db316 MD |
374 | goto error; |
375 | } | |
376 | ||
64803277 | 377 | entry = zmalloc<ust_error_accounting_entry>(); |
533a90fb FD |
378 | if (!entry) { |
379 | PERROR("Failed to allocate event notifier error acounting entry") | |
380 | goto error; | |
381 | } | |
382 | ||
a5a21280 | 383 | urcu_ref_init(&entry->ref); |
761ffce2 | 384 | entry->uid = app->uid; |
b623cb6a | 385 | entry->nr_counter_cpu_fds = lttng_ust_ctl_get_nr_cpu_per_counter(); |
761ffce2 | 386 | |
64803277 | 387 | cpu_counter_fds = calloc<int>(entry->nr_counter_cpu_fds); |
533a90fb FD |
388 | if (!cpu_counter_fds) { |
389 | PERROR("Failed to allocate event notifier error counter file descriptors array: application uid = %d, application name = '%s', pid = %d, allocation size = %zu", | |
28ab034a JG |
390 | (int) app->uid, |
391 | app->name, | |
392 | (int) app->pid, | |
393 | entry->nr_counter_cpu_fds * sizeof(*cpu_counter_fds)); | |
533a90fb FD |
394 | goto error_counter_cpu_fds_alloc; |
395 | } | |
396 | ||
397 | /* Initialize to an invalid fd value to closes fds in case of error. */ | |
398 | for (i = 0; i < entry->nr_counter_cpu_fds; i++) { | |
399 | cpu_counter_fds[i] = -1; | |
400 | } | |
401 | ||
64803277 | 402 | cpu_counters = calloc<lttng_ust_abi_object_data *>(entry->nr_counter_cpu_fds); |
533a90fb FD |
403 | if (!cpu_counters) { |
404 | 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", | |
28ab034a JG |
405 | (int) app->uid, |
406 | app->name, | |
407 | (int) app->pid, | |
408 | entry->nr_counter_cpu_fds * sizeof(struct lttng_ust_abi_object_data *)); | |
533a90fb FD |
409 | goto error_counter_cpus_alloc; |
410 | } | |
411 | ||
412 | for (i = 0; i < entry->nr_counter_cpu_fds; i++) { | |
413 | cpu_counter_fds[i] = shm_create_anonymous("event-notifier-error-accounting"); | |
414 | if (cpu_counter_fds[i] == -1) { | |
415 | ERR("Failed to create event notifier error accounting shared memory for application user: application uid = %d, pid = %d, application name = '%s'", | |
28ab034a JG |
416 | (int) app->uid, |
417 | (int) app->pid, | |
418 | app->name); | |
533a90fb FD |
419 | goto error_shm_alloc; |
420 | } | |
421 | } | |
422 | ||
423 | /* | |
424 | * Ownership of the file descriptors transferred to the ustctl object. | |
425 | */ | |
28ab034a JG |
426 | daemon_counter = lttng_ust_ctl_create_counter(1, |
427 | &dimension, | |
428 | 0, | |
429 | -1, | |
430 | entry->nr_counter_cpu_fds, | |
431 | cpu_counter_fds, | |
432 | LTTNG_UST_CTL_COUNTER_BITNESS_32, | |
433 | LTTNG_UST_CTL_COUNTER_ARITHMETIC_MODULAR, | |
434 | LTTNG_UST_CTL_COUNTER_ALLOC_PER_CPU, | |
435 | false); | |
533a90fb FD |
436 | if (!daemon_counter) { |
437 | goto error_create_daemon_counter; | |
438 | } | |
439 | ||
b623cb6a | 440 | ret = lttng_ust_ctl_create_counter_data(daemon_counter, &counter); |
533a90fb FD |
441 | if (ret) { |
442 | ERR("Failed to create userspace tracer counter data for application user: uid = %d, pid = %d, application name = '%s'", | |
28ab034a JG |
443 | (int) app->uid, |
444 | (int) app->pid, | |
445 | app->name); | |
533a90fb FD |
446 | goto error_create_counter_data; |
447 | } | |
448 | ||
449 | for (i = 0; i < entry->nr_counter_cpu_fds; i++) { | |
28ab034a | 450 | ret = lttng_ust_ctl_create_counter_cpu_data(daemon_counter, i, &cpu_counters[i]); |
533a90fb FD |
451 | if (ret) { |
452 | ERR("Failed to create userspace tracer counter cpu data for application user: uid = %d, pid = %d, application name = '%s'", | |
28ab034a JG |
453 | (int) app->uid, |
454 | (int) app->pid, | |
455 | app->name); | |
533a90fb FD |
456 | goto error_create_counter_cpu_data; |
457 | } | |
458 | } | |
459 | ||
460 | entry->daemon_counter = daemon_counter; | |
461 | entry->counter = counter; | |
462 | entry->cpu_counters = cpu_counters; | |
463 | ||
a5a21280 | 464 | lttng_ht_node_init_u64(&entry->node, entry->uid); |
533a90fb FD |
465 | lttng_ht_add_unique_u64(error_counter_uid_ht, &entry->node); |
466 | ||
467 | goto end; | |
468 | ||
469 | error_create_counter_cpu_data: | |
470 | /* Teardown any allocated cpu counters. */ | |
471 | for (i = 0; i < entry->nr_counter_cpu_fds; i++) { | |
472 | if (!cpu_counters[i]) { | |
473 | /* | |
474 | * Early-exit when error occurred before all cpu | |
475 | * counters could be initialized. | |
476 | */ | |
477 | break; | |
478 | } | |
479 | ||
b623cb6a | 480 | lttng_ust_ctl_release_object(-1, cpu_counters[i]); |
533a90fb FD |
481 | free(cpu_counters[i]); |
482 | } | |
483 | ||
b623cb6a | 484 | lttng_ust_ctl_release_object(-1, entry->counter); |
533a90fb FD |
485 | free(entry->counter); |
486 | error_create_counter_data: | |
b623cb6a | 487 | lttng_ust_ctl_destroy_counter(daemon_counter); |
533a90fb FD |
488 | error_create_daemon_counter: |
489 | error_shm_alloc: | |
8f0646a0 | 490 | /* Error occurred before per-cpu SHMs were handed-off to ustctl. */ |
533a90fb FD |
491 | if (cpu_counter_fds) { |
492 | for (i = 0; i < entry->nr_counter_cpu_fds; i++) { | |
493 | if (cpu_counter_fds[i] < 0) { | |
494 | /* | |
495 | * Early-exit when error occurred before all cpu | |
496 | * counter shm fds could be initialized. | |
497 | */ | |
498 | break; | |
499 | } | |
500 | ||
501 | ret = close(cpu_counter_fds[i]); | |
502 | if (ret) { | |
a5a21280 | 503 | PERROR("Failed to close error counter per-CPU shm file descriptor: fd = %d", |
28ab034a | 504 | cpu_counter_fds[i]); |
533a90fb FD |
505 | } |
506 | } | |
507 | } | |
508 | ||
509 | free(cpu_counters); | |
510 | error_counter_cpus_alloc: | |
511 | error_counter_cpu_fds_alloc: | |
512 | free(entry); | |
513 | error: | |
cd9adb8b | 514 | entry = nullptr; |
533a90fb FD |
515 | end: |
516 | free(cpu_counter_fds); | |
517 | return entry; | |
518 | } | |
519 | ||
28ab034a JG |
520 | static enum event_notifier_error_accounting_status |
521 | send_counter_data_to_ust(struct ust_app *app, struct lttng_ust_abi_object_data *new_counter) | |
533a90fb FD |
522 | { |
523 | int ret; | |
524 | enum event_notifier_error_accounting_status status; | |
525 | ||
526 | /* Attach counter to trigger group. */ | |
527 | pthread_mutex_lock(&app->sock_lock); | |
28ab034a JG |
528 | ret = lttng_ust_ctl_send_counter_data_to_ust( |
529 | app->sock, app->event_notifier_group.object->handle, new_counter); | |
533a90fb FD |
530 | pthread_mutex_unlock(&app->sock_lock); |
531 | if (ret < 0) { | |
532 | if (ret != -EPIPE && ret != -LTTNG_UST_ERR_EXITING) { | |
533 | ERR("Failed to send counter data to application: application name = '%s', pid = %d, ret = %d", | |
28ab034a JG |
534 | app->name, |
535 | app->pid, | |
536 | ret); | |
533a90fb FD |
537 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; |
538 | } else { | |
539 | DBG3("Failed to send counter data to application (application is dead): application name = '%s', pid = %d, ret = %d", | |
28ab034a JG |
540 | app->name, |
541 | app->pid, | |
542 | ret); | |
533a90fb FD |
543 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_APP_DEAD; |
544 | } | |
545 | ||
546 | goto end; | |
547 | } | |
548 | ||
549 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; | |
550 | end: | |
551 | return status; | |
552 | } | |
553 | ||
28ab034a JG |
554 | static enum event_notifier_error_accounting_status |
555 | send_counter_cpu_data_to_ust(struct ust_app *app, | |
556 | struct lttng_ust_abi_object_data *counter, | |
557 | struct lttng_ust_abi_object_data *counter_cpu) | |
533a90fb FD |
558 | { |
559 | int ret; | |
560 | enum event_notifier_error_accounting_status status; | |
561 | ||
562 | pthread_mutex_lock(&app->sock_lock); | |
28ab034a | 563 | ret = lttng_ust_ctl_send_counter_cpu_data_to_ust(app->sock, counter, counter_cpu); |
533a90fb FD |
564 | pthread_mutex_unlock(&app->sock_lock); |
565 | if (ret < 0) { | |
566 | if (ret != -EPIPE && ret != -LTTNG_UST_ERR_EXITING) { | |
567 | ERR("Failed to send counter CPU data to application: application name = '%s', pid = %d, ret = %d", | |
28ab034a JG |
568 | app->name, |
569 | app->pid, | |
570 | ret); | |
533a90fb FD |
571 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; |
572 | } else { | |
573 | DBG3("Failed to send counter CPU data to application: application name = '%s', pid = %d, ret = %d", | |
28ab034a JG |
574 | app->name, |
575 | app->pid, | |
576 | ret); | |
533a90fb FD |
577 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_APP_DEAD; |
578 | } | |
579 | ||
580 | goto end; | |
581 | } | |
582 | ||
583 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; | |
584 | end: | |
585 | return status; | |
586 | } | |
587 | ||
588 | enum event_notifier_error_accounting_status | |
589 | event_notifier_error_accounting_register_app(struct ust_app *app) | |
590 | { | |
591 | int ret; | |
592 | uint64_t i; | |
593 | struct lttng_ust_abi_object_data *new_counter; | |
761ffce2 | 594 | struct ust_error_accounting_entry *entry; |
533a90fb FD |
595 | enum event_notifier_error_accounting_status status; |
596 | struct lttng_ust_abi_object_data **cpu_counters; | |
56047f5a | 597 | lttng::urcu::read_lock_guard read_lock; |
533a90fb | 598 | |
783db316 MD |
599 | if (!ust_app_supports_counters(app)) { |
600 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_UNSUPPORTED; | |
601 | goto end; | |
602 | } | |
603 | ||
533a90fb FD |
604 | /* |
605 | * Check if we already have a error counter for the user id of this | |
606 | * app. If not, create one. | |
607 | */ | |
a5a21280 | 608 | entry = ust_error_accounting_entry_find(error_counter_uid_ht, app); |
cd9adb8b | 609 | if (entry == nullptr) { |
a5a21280 FD |
610 | /* |
611 | * Take the event notifier counter lock before creating the new | |
612 | * entry to ensure that no event notifier is registered between | |
613 | * the the entry creation and event notifier count check. | |
614 | */ | |
615 | pthread_mutex_lock(&the_event_notifier_counter.lock); | |
616 | ||
f46376a1 | 617 | entry = ust_error_accounting_entry_create(app); |
533a90fb FD |
618 | if (!entry) { |
619 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; | |
a5a21280 FD |
620 | pthread_mutex_unlock(&the_event_notifier_counter.lock); |
621 | goto error_creating_entry; | |
622 | } | |
623 | ||
624 | /* | |
625 | * We just created a new UID entry, If there are event | |
626 | * notifiers already registered, take one reference on their | |
627 | * behalf. | |
628 | */ | |
629 | if (the_event_notifier_counter.count > 0) { | |
630 | ust_error_accounting_entry_get(entry); | |
533a90fb | 631 | } |
a5a21280 FD |
632 | |
633 | pthread_mutex_unlock(&the_event_notifier_counter.lock); | |
533a90fb FD |
634 | } |
635 | ||
636 | /* Duplicate counter object data. */ | |
28ab034a | 637 | ret = lttng_ust_ctl_duplicate_ust_object_data(&new_counter, entry->counter); |
533a90fb FD |
638 | if (ret) { |
639 | ERR("Failed to duplicate event notifier error accounting counter for application user: application uid = %d, pid = %d, application name = '%s'", | |
28ab034a JG |
640 | (int) app->uid, |
641 | (int) app->pid, | |
642 | app->name); | |
533a90fb | 643 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; |
a5a21280 | 644 | goto error_duplicate_counter; |
533a90fb FD |
645 | } |
646 | ||
647 | status = send_counter_data_to_ust(app, new_counter); | |
648 | if (status != EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK) { | |
cd9c532c FD |
649 | if (status == EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_APP_DEAD) { |
650 | goto error_send_counter_data; | |
651 | } | |
652 | ||
533a90fb | 653 | ERR("Failed to send counter data to application tracer: status = %s, application uid = %d, pid = %d, application name = '%s'", |
28ab034a JG |
654 | error_accounting_status_str(status), |
655 | (int) app->uid, | |
656 | (int) app->pid, | |
657 | app->name); | |
533a90fb FD |
658 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; |
659 | goto error_send_counter_data; | |
660 | } | |
661 | ||
64803277 | 662 | cpu_counters = calloc<lttng_ust_abi_object_data *>(entry->nr_counter_cpu_fds); |
533a90fb FD |
663 | if (!cpu_counters) { |
664 | 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", | |
28ab034a JG |
665 | (int) app->uid, |
666 | app->name, | |
667 | (int) app->pid, | |
668 | entry->nr_counter_cpu_fds * sizeof(**cpu_counters)); | |
533a90fb FD |
669 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NOMEM; |
670 | goto error_allocate_cpu_counters; | |
671 | } | |
672 | ||
673 | for (i = 0; i < entry->nr_counter_cpu_fds; i++) { | |
cd9adb8b | 674 | struct lttng_ust_abi_object_data *new_counter_cpu = nullptr; |
533a90fb | 675 | |
b623cb6a | 676 | ret = lttng_ust_ctl_duplicate_ust_object_data(&new_counter_cpu, |
28ab034a | 677 | entry->cpu_counters[i]); |
533a90fb FD |
678 | if (ret) { |
679 | ERR("Failed to duplicate userspace tracer counter cpu data for application user: uid = %d, pid = %d, application name = '%s'", | |
28ab034a JG |
680 | (int) app->uid, |
681 | (int) app->pid, | |
682 | app->name); | |
533a90fb FD |
683 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NOMEM; |
684 | goto error_duplicate_cpu_counter; | |
685 | } | |
686 | ||
687 | cpu_counters[i] = new_counter_cpu; | |
688 | ||
28ab034a | 689 | status = send_counter_cpu_data_to_ust(app, new_counter, new_counter_cpu); |
533a90fb | 690 | if (status != EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK) { |
cd9c532c FD |
691 | if (status == EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_APP_DEAD) { |
692 | goto error_send_cpu_counter_data; | |
693 | } | |
694 | ||
533a90fb | 695 | ERR("Failed to send counter cpu data to application tracer: status = %s, application uid = %d, pid = %d, application name = '%s'", |
28ab034a JG |
696 | error_accounting_status_str(status), |
697 | (int) app->uid, | |
698 | (int) app->pid, | |
699 | app->name); | |
533a90fb FD |
700 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; |
701 | goto error_send_cpu_counter_data; | |
702 | } | |
703 | } | |
704 | ||
705 | app->event_notifier_group.counter = new_counter; | |
cd9adb8b | 706 | new_counter = nullptr; |
533a90fb FD |
707 | app->event_notifier_group.nr_counter_cpu = entry->nr_counter_cpu_fds; |
708 | app->event_notifier_group.counter_cpu = cpu_counters; | |
cd9adb8b | 709 | cpu_counters = nullptr; |
56047f5a | 710 | goto end; |
533a90fb | 711 | |
533a90fb FD |
712 | error_send_cpu_counter_data: |
713 | error_duplicate_cpu_counter: | |
714 | /* Teardown any duplicated cpu counters. */ | |
715 | for (i = 0; i < entry->nr_counter_cpu_fds; i++) { | |
716 | if (!cpu_counters[i]) { | |
717 | /* | |
718 | * Early-exit when error occurred before all cpu | |
719 | * counters could be initialized. | |
720 | */ | |
721 | break; | |
722 | } | |
723 | ||
b623cb6a | 724 | lttng_ust_ctl_release_object(-1, cpu_counters[i]); |
533a90fb FD |
725 | free(cpu_counters[i]); |
726 | } | |
727 | ||
a55f8ad1 JG |
728 | free(cpu_counters); |
729 | ||
5d650dcd | 730 | error_allocate_cpu_counters: |
533a90fb | 731 | error_send_counter_data: |
b623cb6a | 732 | lttng_ust_ctl_release_object(-1, new_counter); |
533a90fb | 733 | free(new_counter); |
a5a21280 FD |
734 | error_duplicate_counter: |
735 | ust_error_accounting_entry_put(entry); | |
736 | error_creating_entry: | |
cd9adb8b | 737 | app->event_notifier_group.counter = nullptr; |
783db316 | 738 | end: |
533a90fb FD |
739 | return status; |
740 | } | |
741 | ||
742 | enum event_notifier_error_accounting_status | |
743 | event_notifier_error_accounting_unregister_app(struct ust_app *app) | |
744 | { | |
745 | enum event_notifier_error_accounting_status status; | |
761ffce2 | 746 | struct ust_error_accounting_entry *entry; |
533a90fb FD |
747 | int i; |
748 | ||
56047f5a | 749 | lttng::urcu::read_lock_guard read_lock; |
a5a21280 FD |
750 | |
751 | /* If an error occurred during app registration no entry was created. */ | |
752 | if (!app->event_notifier_group.counter) { | |
753 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; | |
754 | goto end; | |
755 | } | |
756 | ||
757 | entry = ust_error_accounting_entry_find(error_counter_uid_ht, app); | |
cd9adb8b | 758 | if (entry == nullptr) { |
533a90fb | 759 | ERR("Failed to find event notitifier error accounting entry on application teardown: pid = %d, application name = '%s'", |
28ab034a JG |
760 | app->pid, |
761 | app->name); | |
533a90fb FD |
762 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; |
763 | goto end; | |
a5a21280 FD |
764 | } else { |
765 | /* | |
766 | * Put the entry twice as we acquired a reference from the | |
767 | * `ust_error_accounting_entry_find()` above. | |
768 | */ | |
769 | ust_error_accounting_entry_put(entry); | |
770 | ust_error_accounting_entry_put(entry); | |
533a90fb FD |
771 | } |
772 | ||
773 | for (i = 0; i < app->event_notifier_group.nr_counter_cpu; i++) { | |
28ab034a | 774 | lttng_ust_ctl_release_object(app->sock, app->event_notifier_group.counter_cpu[i]); |
533a90fb FD |
775 | free(app->event_notifier_group.counter_cpu[i]); |
776 | } | |
777 | ||
778 | free(app->event_notifier_group.counter_cpu); | |
779 | ||
b623cb6a | 780 | lttng_ust_ctl_release_object(app->sock, app->event_notifier_group.counter); |
533a90fb FD |
781 | free(app->event_notifier_group.counter); |
782 | ||
783 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; | |
784 | end: | |
533a90fb FD |
785 | return status; |
786 | } | |
787 | ||
28ab034a JG |
788 | static enum event_notifier_error_accounting_status |
789 | event_notifier_error_accounting_ust_get_count(const struct lttng_trigger *trigger, uint64_t *count) | |
533a90fb FD |
790 | { |
791 | struct lttng_ht_iter iter; | |
761ffce2 | 792 | struct ust_error_accounting_entry *uid_entry; |
533a90fb FD |
793 | uint64_t error_counter_index, global_sum = 0; |
794 | enum event_notifier_error_accounting_status status; | |
795 | size_t dimension_indexes[1]; | |
796 | const uint64_t tracer_token = lttng_trigger_get_tracer_token(trigger); | |
761ffce2 FD |
797 | uid_t trigger_owner_uid; |
798 | const char *trigger_name; | |
533a90fb | 799 | |
56047f5a | 800 | lttng::urcu::read_lock_guard read_lock; |
533a90fb | 801 | |
761ffce2 FD |
802 | get_trigger_info_for_log(trigger, &trigger_name, &trigger_owner_uid); |
803 | ||
28ab034a | 804 | status = get_error_counter_index_for_token(&ust_state, tracer_token, &error_counter_index); |
533a90fb | 805 | if (status != EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK) { |
28ab034a JG |
806 | ERR("Failed to retrieve index for tracer token: token = %" PRIu64 |
807 | ", trigger name = '%s', trigger owner uid = %d, status = %s", | |
808 | tracer_token, | |
809 | trigger_name, | |
810 | (int) trigger_owner_uid, | |
811 | error_accounting_status_str(status)); | |
533a90fb FD |
812 | goto end; |
813 | } | |
814 | ||
815 | dimension_indexes[0] = error_counter_index; | |
816 | ||
761ffce2 FD |
817 | /* |
818 | * Iterate over all the UID entries. | |
819 | * We aggregate the value of all uid entries regardless of if the uid | |
820 | * matches the trigger's uid because a user that is allowed to register | |
821 | * a trigger to a given sessiond is also allowed to create an event | |
822 | * notifier on all apps that this sessiond is aware of. | |
823 | */ | |
28ab034a | 824 | cds_lfht_for_each_entry (error_counter_uid_ht->ht, &iter.iter, uid_entry, node.node) { |
533a90fb FD |
825 | int ret; |
826 | int64_t local_value = 0; | |
827 | bool overflow = false, underflow = false; | |
828 | ||
b623cb6a | 829 | ret = lttng_ust_ctl_counter_aggregate(uid_entry->daemon_counter, |
28ab034a JG |
830 | dimension_indexes, |
831 | &local_value, | |
832 | &overflow, | |
833 | &underflow); | |
533a90fb | 834 | if (ret || local_value < 0) { |
533a90fb FD |
835 | if (ret) { |
836 | ERR("Failed to aggregate event notifier error counter values of trigger: trigger name = '%s', trigger owner uid = %d", | |
28ab034a JG |
837 | trigger_name, |
838 | (int) trigger_owner_uid); | |
533a90fb FD |
839 | } else if (local_value < 0) { |
840 | ERR("Negative event notifier error counter value encountered during aggregation: trigger name = '%s', trigger owner uid = %d, value = %" PRId64, | |
28ab034a JG |
841 | trigger_name, |
842 | (int) trigger_owner_uid, | |
843 | local_value); | |
533a90fb FD |
844 | } else { |
845 | abort(); | |
846 | } | |
847 | ||
848 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; | |
849 | goto end; | |
850 | } | |
851 | ||
852 | /* Cast is safe as negative values are checked-for above. */ | |
853 | global_sum += (uint64_t) local_value; | |
533a90fb FD |
854 | } |
855 | ||
856 | *count = global_sum; | |
857 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; | |
858 | ||
859 | end: | |
533a90fb FD |
860 | return status; |
861 | } | |
862 | ||
28ab034a JG |
863 | static enum event_notifier_error_accounting_status |
864 | event_notifier_error_accounting_ust_clear(const struct lttng_trigger *trigger) | |
533a90fb FD |
865 | { |
866 | struct lttng_ht_iter iter; | |
761ffce2 | 867 | struct ust_error_accounting_entry *uid_entry; |
533a90fb FD |
868 | uint64_t error_counter_index; |
869 | enum event_notifier_error_accounting_status status; | |
870 | size_t dimension_index; | |
871 | const uint64_t tracer_token = lttng_trigger_get_tracer_token(trigger); | |
872 | ||
56047f5a JG |
873 | lttng::urcu::read_lock_guard read_lock; |
874 | ||
28ab034a | 875 | status = get_error_counter_index_for_token(&ust_state, tracer_token, &error_counter_index); |
533a90fb FD |
876 | if (status != EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK) { |
877 | uid_t trigger_owner_uid; | |
878 | const char *trigger_name; | |
879 | ||
28ab034a | 880 | get_trigger_info_for_log(trigger, &trigger_name, &trigger_owner_uid); |
533a90fb | 881 | |
28ab034a JG |
882 | ERR("Failed to retrieve index for tracer token: token = %" PRIu64 |
883 | ", trigger name = '%s', trigger owner uid = %d, status = %s", | |
884 | tracer_token, | |
885 | trigger_name, | |
886 | (int) trigger_owner_uid, | |
887 | error_accounting_status_str(status)); | |
533a90fb FD |
888 | goto end; |
889 | } | |
890 | ||
891 | dimension_index = error_counter_index; | |
892 | ||
a5a21280 FD |
893 | /* |
894 | * Go over all error counters (ignoring uid) as a trigger (and trigger | |
895 | * errors) can be generated from any applications that this session | |
896 | * daemon is managing. | |
897 | */ | |
28ab034a JG |
898 | cds_lfht_for_each_entry (error_counter_uid_ht->ht, &iter.iter, uid_entry, node.node) { |
899 | const int ret = | |
900 | lttng_ust_ctl_counter_clear(uid_entry->daemon_counter, &dimension_index); | |
533a90fb FD |
901 | |
902 | if (ret) { | |
903 | uid_t trigger_owner_uid; | |
904 | const char *trigger_name; | |
905 | ||
28ab034a | 906 | get_trigger_info_for_log(trigger, &trigger_name, &trigger_owner_uid); |
533a90fb | 907 | ERR("Failed to clear event notifier counter value for trigger: counter uid = %d, trigger name = '%s', trigger owner uid = %d", |
28ab034a JG |
908 | (int) uid_entry->node.key, |
909 | trigger_name, | |
910 | (int) trigger_owner_uid); | |
533a90fb FD |
911 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; |
912 | goto end; | |
913 | } | |
914 | } | |
915 | ||
916 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; | |
917 | end: | |
533a90fb FD |
918 | return status; |
919 | } | |
920 | #endif /* HAVE_LIBLTTNG_UST_CTL */ | |
921 | ||
28ab034a JG |
922 | static enum event_notifier_error_accounting_status |
923 | event_notifier_error_accounting_kernel_clear(const struct lttng_trigger *trigger) | |
90aa04a1 FD |
924 | { |
925 | int ret; | |
926 | uint64_t error_counter_index; | |
927 | enum event_notifier_error_accounting_status status; | |
b8e2fb80 | 928 | struct lttng_kernel_abi_counter_clear counter_clear = {}; |
90aa04a1 | 929 | |
28ab034a JG |
930 | status = get_error_counter_index_for_token( |
931 | &kernel_state, lttng_trigger_get_tracer_token(trigger), &error_counter_index); | |
90aa04a1 FD |
932 | if (status != EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK) { |
933 | uid_t trigger_owner_uid; | |
934 | const char *trigger_name; | |
90aa04a1 | 935 | |
28ab034a | 936 | get_trigger_info_for_log(trigger, &trigger_name, &trigger_owner_uid); |
533a90fb FD |
937 | |
938 | ERR("Failed to get event notifier error counter index: trigger owner uid = %d, trigger name = '%s', status = '%s'", | |
28ab034a JG |
939 | trigger_owner_uid, |
940 | trigger_name, | |
941 | error_accounting_status_str(status)); | |
90aa04a1 FD |
942 | goto end; |
943 | } | |
944 | ||
945 | counter_clear.index.number_dimensions = 1; | |
946 | counter_clear.index.dimension_indexes[0] = error_counter_index; | |
947 | ||
28ab034a | 948 | ret = kernctl_counter_clear(kernel_error_accounting_entry.error_counter_fd, &counter_clear); |
90aa04a1 | 949 | if (ret) { |
533a90fb FD |
950 | uid_t trigger_owner_uid; |
951 | const char *trigger_name; | |
952 | ||
28ab034a | 953 | get_trigger_info_for_log(trigger, &trigger_name, &trigger_owner_uid); |
533a90fb FD |
954 | |
955 | ERR("Failed to clear kernel event notifier error counter: trigger owner uid = %d, trigger name = '%s'", | |
28ab034a JG |
956 | trigger_owner_uid, |
957 | trigger_name); | |
90aa04a1 FD |
958 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; |
959 | goto end; | |
960 | } | |
961 | ||
962 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; | |
963 | end: | |
964 | return status; | |
965 | } | |
966 | ||
967 | enum event_notifier_error_accounting_status | |
28ab034a | 968 | event_notifier_error_accounting_register_kernel(int kernel_event_notifier_group_fd) |
90aa04a1 FD |
969 | { |
970 | int error_counter_fd = -1, ret; | |
971 | enum event_notifier_error_accounting_status status; | |
7966af57 | 972 | lttng_kernel_abi_counter_conf error_counter_conf = { |
b8e2fb80 | 973 | .arithmetic = LTTNG_KERNEL_ABI_COUNTER_ARITHMETIC_MODULAR, |
90aa04a1 | 974 | .bitness = sizeof(void *) == sizeof(uint32_t) ? |
28ab034a JG |
975 | LTTNG_KERNEL_ABI_COUNTER_BITNESS_32 : |
976 | LTTNG_KERNEL_ABI_COUNTER_BITNESS_64, | |
90aa04a1 | 977 | .number_dimensions = 1, |
7966af57 | 978 | .global_sum_step = 0, |
1c9a0b0e MJ |
979 | .dimensions = {}, |
980 | .coalesce_hits = 0, | |
981 | .padding = {}, | |
90aa04a1 | 982 | }; |
7966af57 SM |
983 | error_counter_conf.dimensions[0].size = kernel_state.number_indices; |
984 | error_counter_conf.dimensions[0].has_underflow = false; | |
985 | error_counter_conf.dimensions[0].has_overflow = false; | |
90aa04a1 | 986 | |
28ab034a JG |
987 | ret = kernctl_create_event_notifier_group_error_counter(kernel_event_notifier_group_fd, |
988 | &error_counter_conf); | |
90aa04a1 FD |
989 | if (ret < 0) { |
990 | PERROR("Failed to create event notifier group error counter through kernel ioctl: kernel_event_notifier_group_fd = %d", | |
28ab034a | 991 | kernel_event_notifier_group_fd); |
90aa04a1 FD |
992 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; |
993 | goto error; | |
994 | } | |
995 | ||
996 | error_counter_fd = ret; | |
997 | ||
998 | /* Prevent fd duplication after execlp(). */ | |
999 | ret = fcntl(error_counter_fd, F_SETFD, FD_CLOEXEC); | |
1000 | if (ret < 0) { | |
1001 | PERROR("Failed to set FD_CLOEXEC flag on event notifier error counter file descriptor: error_counter_fd = %d", | |
28ab034a | 1002 | error_counter_fd); |
90aa04a1 FD |
1003 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; |
1004 | goto error; | |
1005 | } | |
1006 | ||
28ab034a | 1007 | DBG("Created kernel event notifier group error counter: fd = %d", error_counter_fd); |
90aa04a1 | 1008 | |
28ab034a | 1009 | kernel_error_accounting_entry.error_counter_fd = error_counter_fd; |
90aa04a1 FD |
1010 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; |
1011 | ||
1012 | error: | |
1013 | return status; | |
1014 | } | |
1015 | ||
28ab034a JG |
1016 | static enum event_notifier_error_accounting_status create_error_counter_index_for_token( |
1017 | struct error_accounting_state *state, uint64_t tracer_token, uint64_t *error_counter_index) | |
90aa04a1 FD |
1018 | { |
1019 | struct index_ht_entry *index_entry; | |
1020 | enum lttng_index_allocator_status index_alloc_status; | |
1021 | uint64_t local_error_counter_index; | |
1022 | enum event_notifier_error_accounting_status status; | |
1023 | ||
a0377dfe | 1024 | LTTNG_ASSERT(state); |
761ffce2 | 1025 | |
90aa04a1 | 1026 | /* Allocate a new index for that counter. */ |
28ab034a JG |
1027 | index_alloc_status = |
1028 | lttng_index_allocator_alloc(state->index_allocator, &local_error_counter_index); | |
90aa04a1 FD |
1029 | switch (index_alloc_status) { |
1030 | case LTTNG_INDEX_ALLOCATOR_STATUS_EMPTY: | |
1031 | DBG("No indices left in the configured event notifier error counter: " | |
28ab034a JG |
1032 | "number-of-indices = %" PRIu64, |
1033 | lttng_index_allocator_get_index_count(state->index_allocator)); | |
90aa04a1 FD |
1034 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NO_INDEX_AVAILABLE; |
1035 | goto end; | |
1036 | case LTTNG_INDEX_ALLOCATOR_STATUS_OK: | |
1037 | break; | |
1038 | default: | |
1039 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; | |
1040 | goto end; | |
1041 | } | |
1042 | ||
64803277 | 1043 | index_entry = zmalloc<index_ht_entry>(); |
cd9adb8b | 1044 | if (index_entry == nullptr) { |
90aa04a1 FD |
1045 | PERROR("Failed to allocate event notifier error counter hash table entry"); |
1046 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NOMEM; | |
1047 | goto end; | |
1048 | } | |
1049 | ||
1050 | index_entry->error_counter_index = local_error_counter_index; | |
1051 | lttng_ht_node_init_u64(&index_entry->node, tracer_token); | |
761ffce2 | 1052 | lttng_ht_add_unique_u64(state->indices_ht, &index_entry->node); |
90aa04a1 | 1053 | |
28ab034a JG |
1054 | DBG("Allocated error counter index for tracer token: tracer token = %" PRIu64 |
1055 | ", index = %" PRIu64, | |
1056 | tracer_token, | |
1057 | local_error_counter_index); | |
90aa04a1 FD |
1058 | *error_counter_index = local_error_counter_index; |
1059 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; | |
1060 | end: | |
1061 | return status; | |
1062 | } | |
1063 | ||
1064 | enum event_notifier_error_accounting_status | |
28ab034a JG |
1065 | event_notifier_error_accounting_register_event_notifier(const struct lttng_trigger *trigger, |
1066 | uint64_t *error_counter_index) | |
90aa04a1 FD |
1067 | { |
1068 | enum event_notifier_error_accounting_status status; | |
1069 | uint64_t local_error_counter_index; | |
761ffce2 FD |
1070 | struct error_accounting_state *state; |
1071 | ||
1072 | switch (lttng_trigger_get_underlying_domain_type_restriction(trigger)) { | |
1073 | case LTTNG_DOMAIN_KERNEL: | |
1074 | state = &kernel_state; | |
1075 | break; | |
1076 | case LTTNG_DOMAIN_UST: | |
496fc78f FD |
1077 | case LTTNG_DOMAIN_PYTHON: |
1078 | case LTTNG_DOMAIN_JUL: | |
1079 | case LTTNG_DOMAIN_LOG4J: | |
761ffce2 FD |
1080 | state = &ust_state; |
1081 | break; | |
1082 | default: | |
1083 | abort(); | |
1084 | } | |
90aa04a1 FD |
1085 | |
1086 | /* | |
1087 | * Check if this event notifier already has a error counter index | |
1088 | * assigned. | |
1089 | */ | |
28ab034a JG |
1090 | status = get_error_counter_index_for_token( |
1091 | state, lttng_trigger_get_tracer_token(trigger), &local_error_counter_index); | |
90aa04a1 FD |
1092 | switch (status) { |
1093 | case EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NOT_FOUND: | |
1094 | { | |
1095 | uid_t trigger_owner_uid; | |
1096 | const char *trigger_name; | |
90aa04a1 | 1097 | |
28ab034a | 1098 | get_trigger_info_for_log(trigger, &trigger_name, &trigger_owner_uid); |
533a90fb FD |
1099 | |
1100 | 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, | |
28ab034a JG |
1101 | trigger_name, |
1102 | trigger_owner_uid, | |
1103 | lttng_trigger_get_tracer_token(trigger)); | |
533a90fb | 1104 | |
28ab034a JG |
1105 | status = create_error_counter_index_for_token( |
1106 | state, lttng_trigger_get_tracer_token(trigger), &local_error_counter_index); | |
90aa04a1 | 1107 | if (status != EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK) { |
533a90fb | 1108 | ERR("Error creating index for token: status = %s, trigger name = '%s', trigger owner uid = %d", |
28ab034a JG |
1109 | error_accounting_status_str(status), |
1110 | trigger_name, | |
1111 | trigger_owner_uid); | |
90aa04a1 FD |
1112 | goto end; |
1113 | } | |
90aa04a1 | 1114 | } |
30eb3927 | 1115 | /* fall-through. */ |
90aa04a1 FD |
1116 | case EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK: |
1117 | *error_counter_index = local_error_counter_index; | |
1118 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; | |
1119 | break; | |
1120 | default: | |
1121 | break; | |
1122 | } | |
1123 | ||
a5a21280 FD |
1124 | #ifdef HAVE_LIBLTTNG_UST_CTL |
1125 | switch (lttng_trigger_get_underlying_domain_type_restriction(trigger)) { | |
1126 | case LTTNG_DOMAIN_UST: | |
496fc78f FD |
1127 | case LTTNG_DOMAIN_PYTHON: |
1128 | case LTTNG_DOMAIN_JUL: | |
1129 | case LTTNG_DOMAIN_LOG4J: | |
a5a21280 FD |
1130 | pthread_mutex_lock(&the_event_notifier_counter.lock); |
1131 | the_event_notifier_counter.count++; | |
1132 | if (the_event_notifier_counter.count == 1) { | |
1133 | /* | |
1134 | * On the first event notifier, we get a reference to | |
1135 | * every existing UID entries. This ensures that the | |
1136 | * entries are kept around if there are still | |
1137 | * registered event notifiers but no apps. | |
1138 | */ | |
1139 | get_ref_all_ust_error_accounting_entry(); | |
1140 | } | |
1141 | pthread_mutex_unlock(&the_event_notifier_counter.lock); | |
1142 | break; | |
1143 | default: | |
1144 | break; | |
1145 | } | |
1146 | #endif /* HAVE_LIBLTTNG_UST_CTL */ | |
1147 | ||
90aa04a1 FD |
1148 | end: |
1149 | return status; | |
1150 | } | |
1151 | ||
28ab034a JG |
1152 | static enum event_notifier_error_accounting_status |
1153 | event_notifier_error_accounting_kernel_get_count(const struct lttng_trigger *trigger, | |
1154 | uint64_t *count) | |
90aa04a1 | 1155 | { |
b8e2fb80 | 1156 | struct lttng_kernel_abi_counter_aggregate counter_aggregate = {}; |
90aa04a1 FD |
1157 | enum event_notifier_error_accounting_status status; |
1158 | uint64_t error_counter_index; | |
1159 | int ret; | |
1160 | ||
28ab034a JG |
1161 | status = get_error_counter_index_for_token( |
1162 | &kernel_state, lttng_trigger_get_tracer_token(trigger), &error_counter_index); | |
90aa04a1 | 1163 | if (status != EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK) { |
533a90fb | 1164 | ERR("Error getting index for token: status=%s", |
28ab034a | 1165 | error_accounting_status_str(status)); |
90aa04a1 FD |
1166 | goto end; |
1167 | } | |
1168 | ||
1169 | counter_aggregate.index.number_dimensions = 1; | |
1170 | counter_aggregate.index.dimension_indexes[0] = error_counter_index; | |
1171 | ||
a0377dfe | 1172 | LTTNG_ASSERT(kernel_error_accounting_entry.error_counter_fd); |
90aa04a1 | 1173 | |
28ab034a JG |
1174 | ret = kernctl_counter_get_aggregate_value(kernel_error_accounting_entry.error_counter_fd, |
1175 | &counter_aggregate); | |
90aa04a1 FD |
1176 | if (ret || counter_aggregate.value.value < 0) { |
1177 | uid_t trigger_owner_uid; | |
1178 | const char *trigger_name; | |
533a90fb | 1179 | |
28ab034a | 1180 | get_trigger_info_for_log(trigger, &trigger_name, &trigger_owner_uid); |
90aa04a1 FD |
1181 | |
1182 | if (counter_aggregate.value.value < 0) { | |
1183 | ERR("Invalid negative event notifier error counter value: trigger owner = %d, trigger name = '%s', value = %" PRId64, | |
28ab034a JG |
1184 | trigger_owner_uid, |
1185 | trigger_name, | |
1186 | counter_aggregate.value.value); | |
90aa04a1 FD |
1187 | } else { |
1188 | ERR("Failed to getting event notifier error count: trigger owner = %d, trigger name = '%s', ret = %d", | |
28ab034a JG |
1189 | trigger_owner_uid, |
1190 | trigger_name, | |
1191 | ret); | |
90aa04a1 FD |
1192 | } |
1193 | ||
1194 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; | |
1195 | goto end; | |
1196 | } | |
1197 | ||
1198 | /* Error count can't be negative. */ | |
a0377dfe | 1199 | LTTNG_ASSERT(counter_aggregate.value.value >= 0); |
90aa04a1 FD |
1200 | *count = (uint64_t) counter_aggregate.value.value; |
1201 | ||
1202 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; | |
1203 | ||
1204 | end: | |
1205 | return status; | |
1206 | } | |
1207 | ||
1208 | enum event_notifier_error_accounting_status | |
28ab034a | 1209 | event_notifier_error_accounting_get_count(const struct lttng_trigger *trigger, uint64_t *count) |
90aa04a1 FD |
1210 | { |
1211 | switch (lttng_trigger_get_underlying_domain_type_restriction(trigger)) { | |
1212 | case LTTNG_DOMAIN_KERNEL: | |
28ab034a | 1213 | return event_notifier_error_accounting_kernel_get_count(trigger, count); |
90aa04a1 | 1214 | case LTTNG_DOMAIN_UST: |
496fc78f FD |
1215 | case LTTNG_DOMAIN_PYTHON: |
1216 | case LTTNG_DOMAIN_JUL: | |
1217 | case LTTNG_DOMAIN_LOG4J: | |
533a90fb | 1218 | #ifdef HAVE_LIBLTTNG_UST_CTL |
28ab034a | 1219 | return event_notifier_error_accounting_ust_get_count(trigger, count); |
533a90fb | 1220 | #else |
43cee6f9 | 1221 | *count = 0; |
90aa04a1 | 1222 | return EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; |
533a90fb | 1223 | #endif /* HAVE_LIBLTTNG_UST_CTL */ |
90aa04a1 FD |
1224 | default: |
1225 | abort(); | |
1226 | } | |
1227 | } | |
1228 | ||
28ab034a | 1229 | static enum event_notifier_error_accounting_status |
90aa04a1 FD |
1230 | event_notifier_error_accounting_clear(const struct lttng_trigger *trigger) |
1231 | { | |
1232 | switch (lttng_trigger_get_underlying_domain_type_restriction(trigger)) { | |
1233 | case LTTNG_DOMAIN_KERNEL: | |
1234 | return event_notifier_error_accounting_kernel_clear(trigger); | |
1235 | case LTTNG_DOMAIN_UST: | |
496fc78f FD |
1236 | case LTTNG_DOMAIN_PYTHON: |
1237 | case LTTNG_DOMAIN_JUL: | |
1238 | case LTTNG_DOMAIN_LOG4J: | |
533a90fb FD |
1239 | #ifdef HAVE_LIBLTTNG_UST_CTL |
1240 | return event_notifier_error_accounting_ust_clear(trigger); | |
1241 | #else | |
90aa04a1 | 1242 | return EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; |
533a90fb | 1243 | #endif /* HAVE_LIBLTTNG_UST_CTL */ |
90aa04a1 FD |
1244 | default: |
1245 | abort(); | |
1246 | } | |
1247 | } | |
1248 | ||
1249 | static void free_index_ht_entry(struct rcu_head *head) | |
1250 | { | |
28ab034a | 1251 | struct index_ht_entry *entry = caa_container_of(head, struct index_ht_entry, rcu_head); |
90aa04a1 FD |
1252 | |
1253 | free(entry); | |
1254 | } | |
1255 | ||
28ab034a | 1256 | void event_notifier_error_accounting_unregister_event_notifier(const struct lttng_trigger *trigger) |
90aa04a1 FD |
1257 | { |
1258 | struct lttng_ht_iter iter; | |
1259 | struct lttng_ht_node_u64 *node; | |
533a90fb | 1260 | const uint64_t tracer_token = lttng_trigger_get_tracer_token(trigger); |
90aa04a1 | 1261 | enum event_notifier_error_accounting_status status; |
761ffce2 | 1262 | struct error_accounting_state *state; |
90aa04a1 | 1263 | |
56047f5a JG |
1264 | lttng::urcu::read_lock_guard read_lock; |
1265 | ||
90aa04a1 FD |
1266 | status = event_notifier_error_accounting_clear(trigger); |
1267 | if (status != EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK) { | |
533a90fb FD |
1268 | /* Trigger details already logged by callee on error. */ |
1269 | ERR("Failed to clear event notifier error counter during unregistration of event notifier: status = '%s'", | |
28ab034a | 1270 | error_accounting_status_str(status)); |
a5a21280 | 1271 | goto end; |
90aa04a1 FD |
1272 | } |
1273 | ||
761ffce2 FD |
1274 | switch (lttng_trigger_get_underlying_domain_type_restriction(trigger)) { |
1275 | case LTTNG_DOMAIN_KERNEL: | |
1276 | state = &kernel_state; | |
1277 | break; | |
a5a21280 | 1278 | #ifdef HAVE_LIBLTTNG_UST_CTL |
761ffce2 | 1279 | case LTTNG_DOMAIN_UST: |
496fc78f FD |
1280 | case LTTNG_DOMAIN_PYTHON: |
1281 | case LTTNG_DOMAIN_JUL: | |
1282 | case LTTNG_DOMAIN_LOG4J: | |
761ffce2 | 1283 | state = &ust_state; |
a5a21280 FD |
1284 | |
1285 | pthread_mutex_lock(&the_event_notifier_counter.lock); | |
1286 | the_event_notifier_counter.count--; | |
1287 | if (the_event_notifier_counter.count == 0) { | |
a5a21280 FD |
1288 | /* |
1289 | * When unregistering the last event notifier, put one | |
1290 | * reference to every uid entries on the behalf of all | |
1291 | * event notifiers. | |
1292 | */ | |
1293 | put_ref_all_ust_error_accounting_entry(); | |
1294 | } | |
1295 | ||
1296 | pthread_mutex_unlock(&the_event_notifier_counter.lock); | |
1297 | ||
761ffce2 | 1298 | break; |
a5a21280 | 1299 | #endif /* HAVE_LIBLTTNG_UST_CTL */ |
761ffce2 FD |
1300 | default: |
1301 | abort(); | |
1302 | } | |
1303 | ||
761ffce2 | 1304 | lttng_ht_lookup(state->indices_ht, &tracer_token, &iter); |
90aa04a1 | 1305 | node = lttng_ht_iter_get_node_u64(&iter); |
533a90fb | 1306 | if (node) { |
44d0e2f1 | 1307 | int del_ret; |
0114db0e | 1308 | struct index_ht_entry *index_entry = |
28ab034a | 1309 | lttng::utils::container_of(node, &index_ht_entry::node); |
533a90fb FD |
1310 | enum lttng_index_allocator_status index_alloc_status; |
1311 | ||
90aa04a1 | 1312 | index_alloc_status = lttng_index_allocator_release( |
28ab034a | 1313 | state->index_allocator, index_entry->error_counter_index); |
90aa04a1 | 1314 | if (index_alloc_status != LTTNG_INDEX_ALLOCATOR_STATUS_OK) { |
533a90fb FD |
1315 | uid_t trigger_owner_uid; |
1316 | const char *trigger_name; | |
1317 | ||
28ab034a | 1318 | get_trigger_info_for_log(trigger, &trigger_name, &trigger_owner_uid); |
533a90fb | 1319 | |
28ab034a JG |
1320 | ERR("Failed to release event notifier error counter index: index = %" PRIu64 |
1321 | ", trigger name = '%s', trigger owner uid = %d", | |
1322 | index_entry->error_counter_index, | |
1323 | trigger_name, | |
1324 | (int) trigger_owner_uid); | |
533a90fb | 1325 | /* Don't exit, perform the rest of the clean-up. */ |
90aa04a1 FD |
1326 | } |
1327 | ||
761ffce2 | 1328 | del_ret = lttng_ht_del(state->indices_ht, &iter); |
a0377dfe | 1329 | LTTNG_ASSERT(!del_ret); |
90aa04a1 FD |
1330 | call_rcu(&index_entry->rcu_head, free_index_ht_entry); |
1331 | } | |
a5a21280 | 1332 | end: |
56047f5a | 1333 | return; |
90aa04a1 FD |
1334 | } |
1335 | ||
cd9adb8b | 1336 | void event_notifier_error_accounting_fini() |
90aa04a1 | 1337 | { |
a5a21280 FD |
1338 | if (kernel_error_accounting_entry.error_counter_fd) { |
1339 | const int ret = close(kernel_error_accounting_entry.error_counter_fd); | |
90aa04a1 FD |
1340 | |
1341 | if (ret) { | |
1342 | PERROR("Failed to close kernel event notifier error counter"); | |
1343 | } | |
1344 | } | |
1345 | ||
533a90fb FD |
1346 | lttng_ht_destroy(error_counter_uid_ht); |
1347 | ||
761ffce2 FD |
1348 | fini_error_accounting_state(&kernel_state); |
1349 | fini_error_accounting_state(&ust_state); | |
90aa04a1 | 1350 | } |