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> | |
28ab034a | 17 | |
c9e313bc | 18 | #include <lttng/trigger/trigger-internal.hpp> |
90aa04a1 | 19 | |
28ab034a JG |
20 | #include <fcntl.h> |
21 | #include <pthread.h> | |
22 | #include <sys/mman.h> | |
23 | #include <sys/stat.h> | |
24 | #include <unistd.h> | |
25 | #include <urcu/compiler.h> | |
90aa04a1 FD |
26 | |
27 | #define ERROR_COUNTER_INDEX_HT_INITIAL_SIZE 16 | |
28 | ||
f1494934 | 29 | namespace { |
90aa04a1 FD |
30 | struct index_ht_entry { |
31 | struct lttng_ht_node_u64 node; | |
32 | uint64_t error_counter_index; | |
33 | struct rcu_head rcu_head; | |
34 | }; | |
35 | ||
761ffce2 FD |
36 | struct ust_error_accounting_entry { |
37 | uid_t uid; | |
a5a21280 | 38 | struct urcu_ref ref; |
533a90fb FD |
39 | struct lttng_ht_node_u64 node; |
40 | struct rcu_head rcu_head; | |
b623cb6a | 41 | struct lttng_ust_ctl_daemon_counter *daemon_counter; |
533a90fb | 42 | /* |
a5a21280 FD |
43 | * Those `lttng_ust_abi_object_data` are anonymous handles to the |
44 | * counters objects. | |
533a90fb FD |
45 | * They are only used to be duplicated for each new applications of the |
46 | * user. To destroy them, call with the `sock` parameter set to -1. | |
b623cb6a | 47 | * e.g. `lttng_ust_ctl_release_object(-1, data)`; |
533a90fb FD |
48 | */ |
49 | struct lttng_ust_abi_object_data *counter; | |
50 | struct lttng_ust_abi_object_data **cpu_counters; | |
51 | int nr_counter_cpu_fds; | |
52 | }; | |
53 | ||
761ffce2 | 54 | struct kernel_error_accounting_entry { |
a5a21280 | 55 | int error_counter_fd; |
90aa04a1 FD |
56 | }; |
57 | ||
f1494934 | 58 | struct kernel_error_accounting_entry kernel_error_accounting_entry; |
90aa04a1 | 59 | |
533a90fb | 60 | /* Hashtable mapping uid to error_account_entry. */ |
f1494934 | 61 | struct lttng_ht *error_counter_uid_ht; |
533a90fb | 62 | |
761ffce2 FD |
63 | struct error_accounting_state { |
64 | struct lttng_index_allocator *index_allocator; | |
65 | /* Hashtable mapping event notifier token to index_ht_entry. */ | |
66 | struct lttng_ht *indices_ht; | |
67 | uint64_t number_indices; | |
68 | }; | |
69 | ||
f1494934 JG |
70 | struct error_accounting_state ust_state; |
71 | struct error_accounting_state kernel_state; | |
72 | } /* namespace */ | |
90aa04a1 | 73 | |
533a90fb | 74 | static inline void get_trigger_info_for_log(const struct lttng_trigger *trigger, |
28ab034a JG |
75 | const char **trigger_name, |
76 | uid_t *trigger_owner_uid) | |
533a90fb FD |
77 | { |
78 | enum lttng_trigger_status trigger_status; | |
79 | ||
80 | trigger_status = lttng_trigger_get_name(trigger, trigger_name); | |
81 | switch (trigger_status) { | |
82 | case LTTNG_TRIGGER_STATUS_OK: | |
83 | break; | |
84 | case LTTNG_TRIGGER_STATUS_UNSET: | |
0efb2ad7 | 85 | *trigger_name = "(anonymous)"; |
533a90fb FD |
86 | break; |
87 | default: | |
88 | abort(); | |
89 | } | |
90 | ||
28ab034a | 91 | trigger_status = lttng_trigger_get_owner_uid(trigger, trigger_owner_uid); |
a0377dfe | 92 | LTTNG_ASSERT(trigger_status == LTTNG_TRIGGER_STATUS_OK); |
533a90fb FD |
93 | } |
94 | ||
28ab034a JG |
95 | static inline const char * |
96 | error_accounting_status_str(enum event_notifier_error_accounting_status status) | |
90aa04a1 FD |
97 | { |
98 | switch (status) { | |
99 | case EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK: | |
100 | return "OK"; | |
101 | case EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR: | |
102 | return "ERROR"; | |
103 | case EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NOT_FOUND: | |
104 | return "NOT_FOUND"; | |
105 | case EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NOMEM: | |
106 | return "NOMEM"; | |
107 | case EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NO_INDEX_AVAILABLE: | |
108 | return "NO_INDEX_AVAILABLE"; | |
533a90fb FD |
109 | case EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_APP_DEAD: |
110 | return "APP_DEAD"; | |
90aa04a1 FD |
111 | default: |
112 | abort(); | |
113 | } | |
114 | } | |
115 | ||
a5a21280 | 116 | #ifdef HAVE_LIBLTTNG_UST_CTL |
f1494934 | 117 | namespace { |
a5a21280 FD |
118 | struct event_notifier_counter { |
119 | pthread_mutex_t lock; | |
120 | long count; | |
121 | }; | |
122 | ||
f1494934 JG |
123 | struct event_notifier_counter the_event_notifier_counter; |
124 | } /* namespace */ | |
a5a21280 FD |
125 | |
126 | static void free_ust_error_accounting_entry(struct rcu_head *head) | |
127 | { | |
128 | int i; | |
129 | struct ust_error_accounting_entry *entry = | |
28ab034a | 130 | lttng::utils::container_of(head, &ust_error_accounting_entry::rcu_head); |
a5a21280 FD |
131 | |
132 | for (i = 0; i < entry->nr_counter_cpu_fds; i++) { | |
b623cb6a | 133 | lttng_ust_ctl_release_object(-1, entry->cpu_counters[i]); |
a5a21280 FD |
134 | free(entry->cpu_counters[i]); |
135 | } | |
136 | ||
137 | free(entry->cpu_counters); | |
138 | ||
b623cb6a | 139 | lttng_ust_ctl_release_object(-1, entry->counter); |
a5a21280 FD |
140 | free(entry->counter); |
141 | ||
b623cb6a | 142 | lttng_ust_ctl_destroy_counter(entry->daemon_counter); |
a5a21280 FD |
143 | |
144 | free(entry); | |
145 | } | |
146 | ||
28ab034a | 147 | static bool ust_error_accounting_entry_get(struct ust_error_accounting_entry *entry) |
a5a21280 FD |
148 | { |
149 | return urcu_ref_get_unless_zero(&entry->ref); | |
150 | } | |
151 | ||
28ab034a | 152 | static void ust_error_accounting_entry_release(struct urcu_ref *entry_ref) |
a5a21280 FD |
153 | { |
154 | struct ust_error_accounting_entry *entry = | |
28ab034a | 155 | lttng::utils::container_of(entry_ref, &ust_error_accounting_entry::ref); |
a5a21280 FD |
156 | |
157 | rcu_read_lock(); | |
158 | cds_lfht_del(error_counter_uid_ht->ht, &entry->node.node); | |
159 | call_rcu(&entry->rcu_head, free_ust_error_accounting_entry); | |
160 | rcu_read_unlock(); | |
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 | */ | |
28ab034a | 175 | static void put_ref_all_ust_error_accounting_entry(void) |
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 | ||
182 | rcu_read_lock(); | |
28ab034a JG |
183 | cds_lfht_for_each_entry (error_counter_uid_ht->ht, &iter.iter, uid_entry, node.node) { |
184 | ust_error_accounting_entry_put(uid_entry); | |
a5a21280 FD |
185 | } |
186 | ||
187 | rcu_read_unlock(); | |
188 | } | |
189 | ||
190 | /* | |
191 | * Get one reference to every UID entries. | |
192 | */ | |
28ab034a | 193 | static void get_ref_all_ust_error_accounting_entry(void) |
a5a21280 FD |
194 | { |
195 | struct lttng_ht_iter iter; | |
196 | struct ust_error_accounting_entry *uid_entry; | |
197 | ||
198 | ASSERT_LOCKED(the_event_notifier_counter.lock); | |
199 | ||
200 | rcu_read_lock(); | |
28ab034a JG |
201 | cds_lfht_for_each_entry (error_counter_uid_ht->ht, &iter.iter, uid_entry, node.node) { |
202 | ust_error_accounting_entry_get(uid_entry); | |
a5a21280 FD |
203 | } |
204 | ||
205 | rcu_read_unlock(); | |
206 | } | |
207 | ||
208 | #endif /* HAVE_LIBLTTNG_UST_CTL */ | |
209 | ||
28ab034a JG |
210 | static enum event_notifier_error_accounting_status |
211 | init_error_accounting_state(struct error_accounting_state *state, uint64_t index_count) | |
90aa04a1 FD |
212 | { |
213 | enum event_notifier_error_accounting_status status; | |
214 | ||
a0377dfe | 215 | LTTNG_ASSERT(state); |
761ffce2 FD |
216 | |
217 | state->number_indices = index_count; | |
218 | ||
219 | state->index_allocator = lttng_index_allocator_create(index_count); | |
220 | if (!state->index_allocator) { | |
221 | ERR("Failed to allocate event notifier error counter index allocator"); | |
90aa04a1 | 222 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NOMEM; |
761ffce2 | 223 | goto end; |
90aa04a1 FD |
224 | } |
225 | ||
28ab034a | 226 | state->indices_ht = lttng_ht_new(ERROR_COUNTER_INDEX_HT_INITIAL_SIZE, LTTNG_HT_TYPE_U64); |
761ffce2 | 227 | if (!state->indices_ht) { |
533a90fb FD |
228 | ERR("Failed to allocate error counter indices hash table"); |
229 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NOMEM; | |
761ffce2 FD |
230 | goto error_indices_ht; |
231 | } | |
232 | ||
233 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; | |
234 | goto end; | |
235 | ||
236 | error_indices_ht: | |
237 | lttng_index_allocator_destroy(state->index_allocator); | |
238 | state->index_allocator = NULL; | |
239 | end: | |
240 | return status; | |
241 | } | |
242 | ||
28ab034a | 243 | static void fini_error_accounting_state(struct error_accounting_state *state) |
761ffce2 | 244 | { |
a0377dfe | 245 | LTTNG_ASSERT(state); |
761ffce2 FD |
246 | |
247 | /* | |
248 | * Will assert if some error counter indices were not released (an | |
249 | * internal error). | |
250 | */ | |
251 | lttng_ht_destroy(state->indices_ht); | |
252 | lttng_index_allocator_destroy(state->index_allocator); | |
253 | } | |
254 | ||
255 | enum event_notifier_error_accounting_status | |
28ab034a | 256 | event_notifier_error_accounting_init(uint64_t buffer_size_kernel, uint64_t buffer_size_ust) |
761ffce2 FD |
257 | { |
258 | enum event_notifier_error_accounting_status status; | |
259 | ||
260 | status = init_error_accounting_state(&kernel_state, buffer_size_kernel); | |
261 | if (status != EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK) { | |
262 | ERR("Failed to initialize kernel event notifier accounting state: status = %s", | |
28ab034a | 263 | error_accounting_status_str(status)); |
761ffce2 FD |
264 | goto end; |
265 | } | |
266 | ||
267 | status = init_error_accounting_state(&ust_state, buffer_size_ust); | |
268 | if (status != EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK) { | |
269 | ERR("Failed to initialize UST event notifier accounting state: status = %s", | |
28ab034a | 270 | error_accounting_status_str(status)); |
761ffce2 | 271 | goto error_ust_state; |
533a90fb FD |
272 | } |
273 | ||
28ab034a | 274 | error_counter_uid_ht = lttng_ht_new(ERROR_COUNTER_INDEX_HT_INITIAL_SIZE, LTTNG_HT_TYPE_U64); |
533a90fb FD |
275 | if (!error_counter_uid_ht) { |
276 | ERR("Failed to allocate UID to error counter accountant hash table"); | |
90aa04a1 | 277 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NOMEM; |
761ffce2 | 278 | goto error_uid_ht; |
90aa04a1 FD |
279 | } |
280 | ||
90aa04a1 | 281 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; |
761ffce2 | 282 | goto end; |
90aa04a1 | 283 | |
761ffce2 FD |
284 | error_uid_ht: |
285 | fini_error_accounting_state(&ust_state); | |
286 | error_ust_state: | |
287 | fini_error_accounting_state(&kernel_state); | |
288 | end: | |
90aa04a1 FD |
289 | return status; |
290 | } | |
291 | ||
a5a21280 FD |
292 | /* |
293 | * Return the error counteur index associated to this event notifier tracer | |
294 | * token. Returns _STATUS_OK if found and _STATUS_NOT_FOUND otherwise. | |
295 | */ | |
28ab034a JG |
296 | static enum event_notifier_error_accounting_status get_error_counter_index_for_token( |
297 | struct error_accounting_state *state, uint64_t tracer_token, uint64_t *error_counter_index) | |
90aa04a1 FD |
298 | { |
299 | struct lttng_ht_node_u64 *node; | |
300 | struct lttng_ht_iter iter; | |
301 | const struct index_ht_entry *index_entry; | |
302 | enum event_notifier_error_accounting_status status; | |
303 | ||
304 | rcu_read_lock(); | |
761ffce2 | 305 | lttng_ht_lookup(state->indices_ht, &tracer_token, &iter); |
90aa04a1 FD |
306 | node = lttng_ht_iter_get_node_u64(&iter); |
307 | if (node) { | |
0114db0e | 308 | index_entry = lttng::utils::container_of(node, &index_ht_entry::node); |
90aa04a1 FD |
309 | *error_counter_index = index_entry->error_counter_index; |
310 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; | |
311 | } else { | |
312 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NOT_FOUND; | |
313 | } | |
314 | ||
315 | rcu_read_unlock(); | |
316 | return status; | |
317 | } | |
318 | ||
533a90fb | 319 | #ifdef HAVE_LIBLTTNG_UST_CTL |
a5a21280 FD |
320 | /* |
321 | * Find the entry for this app's UID, the caller acquires a reference if the | |
322 | * entry is found. | |
323 | */ | |
28ab034a JG |
324 | static struct ust_error_accounting_entry *ust_error_accounting_entry_find(struct lttng_ht *uid_ht, |
325 | const struct ust_app *app) | |
533a90fb | 326 | { |
761ffce2 | 327 | struct ust_error_accounting_entry *entry; |
533a90fb FD |
328 | struct lttng_ht_node_u64 *node; |
329 | struct lttng_ht_iter iter; | |
330 | uint64_t key = app->uid; | |
331 | ||
a5a21280 | 332 | lttng_ht_lookup(uid_ht, &key, &iter); |
533a90fb | 333 | node = lttng_ht_iter_get_node_u64(&iter); |
28ab034a | 334 | if (node == NULL) { |
533a90fb FD |
335 | entry = NULL; |
336 | } else { | |
a5a21280 FD |
337 | bool got_ref; |
338 | ||
28ab034a | 339 | entry = caa_container_of(node, struct ust_error_accounting_entry, node); |
a5a21280 FD |
340 | |
341 | got_ref = ust_error_accounting_entry_get(entry); | |
342 | if (!got_ref) { | |
343 | entry = NULL; | |
344 | } | |
533a90fb FD |
345 | } |
346 | ||
347 | return entry; | |
348 | } | |
349 | ||
a5a21280 FD |
350 | /* |
351 | * Create the entry for this app's UID, the caller acquires a reference to the | |
352 | * entry, | |
353 | */ | |
28ab034a JG |
354 | static struct ust_error_accounting_entry * |
355 | ust_error_accounting_entry_create(const struct ust_app *app) | |
533a90fb | 356 | { |
a5a21280 | 357 | int i, ret, *cpu_counter_fds = NULL; |
b623cb6a | 358 | struct lttng_ust_ctl_daemon_counter *daemon_counter; |
533a90fb | 359 | struct lttng_ust_abi_object_data *counter, **cpu_counters; |
761ffce2 | 360 | struct ust_error_accounting_entry *entry = NULL; |
5728ab7d | 361 | lttng_ust_ctl_counter_dimension dimension = {}; |
7966af57 SM |
362 | |
363 | dimension.size = ust_state.number_indices; | |
364 | dimension.has_underflow = false; | |
365 | dimension.has_overflow = false; | |
533a90fb | 366 | |
783db316 MD |
367 | if (!ust_app_supports_counters(app)) { |
368 | DBG("Refusing to create accounting entry for application (unsupported feature): app name = '%s', app ppid = %d", | |
28ab034a JG |
369 | app->name, |
370 | (int) app->ppid); | |
783db316 MD |
371 | goto error; |
372 | } | |
373 | ||
64803277 | 374 | entry = zmalloc<ust_error_accounting_entry>(); |
533a90fb FD |
375 | if (!entry) { |
376 | PERROR("Failed to allocate event notifier error acounting entry") | |
377 | goto error; | |
378 | } | |
379 | ||
a5a21280 | 380 | urcu_ref_init(&entry->ref); |
761ffce2 | 381 | entry->uid = app->uid; |
b623cb6a | 382 | entry->nr_counter_cpu_fds = lttng_ust_ctl_get_nr_cpu_per_counter(); |
761ffce2 | 383 | |
64803277 | 384 | cpu_counter_fds = calloc<int>(entry->nr_counter_cpu_fds); |
533a90fb FD |
385 | if (!cpu_counter_fds) { |
386 | PERROR("Failed to allocate event notifier error counter file descriptors array: application uid = %d, application name = '%s', pid = %d, allocation size = %zu", | |
28ab034a JG |
387 | (int) app->uid, |
388 | app->name, | |
389 | (int) app->pid, | |
390 | entry->nr_counter_cpu_fds * sizeof(*cpu_counter_fds)); | |
533a90fb FD |
391 | goto error_counter_cpu_fds_alloc; |
392 | } | |
393 | ||
394 | /* Initialize to an invalid fd value to closes fds in case of error. */ | |
395 | for (i = 0; i < entry->nr_counter_cpu_fds; i++) { | |
396 | cpu_counter_fds[i] = -1; | |
397 | } | |
398 | ||
64803277 | 399 | cpu_counters = calloc<lttng_ust_abi_object_data *>(entry->nr_counter_cpu_fds); |
533a90fb FD |
400 | if (!cpu_counters) { |
401 | 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 |
402 | (int) app->uid, |
403 | app->name, | |
404 | (int) app->pid, | |
405 | entry->nr_counter_cpu_fds * sizeof(struct lttng_ust_abi_object_data *)); | |
533a90fb FD |
406 | goto error_counter_cpus_alloc; |
407 | } | |
408 | ||
409 | for (i = 0; i < entry->nr_counter_cpu_fds; i++) { | |
410 | cpu_counter_fds[i] = shm_create_anonymous("event-notifier-error-accounting"); | |
411 | if (cpu_counter_fds[i] == -1) { | |
412 | ERR("Failed to create event notifier error accounting shared memory for application user: application uid = %d, pid = %d, application name = '%s'", | |
28ab034a JG |
413 | (int) app->uid, |
414 | (int) app->pid, | |
415 | app->name); | |
533a90fb FD |
416 | goto error_shm_alloc; |
417 | } | |
418 | } | |
419 | ||
420 | /* | |
421 | * Ownership of the file descriptors transferred to the ustctl object. | |
422 | */ | |
28ab034a JG |
423 | daemon_counter = lttng_ust_ctl_create_counter(1, |
424 | &dimension, | |
425 | 0, | |
426 | -1, | |
427 | entry->nr_counter_cpu_fds, | |
428 | cpu_counter_fds, | |
429 | LTTNG_UST_CTL_COUNTER_BITNESS_32, | |
430 | LTTNG_UST_CTL_COUNTER_ARITHMETIC_MODULAR, | |
431 | LTTNG_UST_CTL_COUNTER_ALLOC_PER_CPU, | |
432 | false); | |
533a90fb FD |
433 | if (!daemon_counter) { |
434 | goto error_create_daemon_counter; | |
435 | } | |
436 | ||
b623cb6a | 437 | ret = lttng_ust_ctl_create_counter_data(daemon_counter, &counter); |
533a90fb FD |
438 | if (ret) { |
439 | ERR("Failed to create userspace tracer counter data for application user: uid = %d, pid = %d, application name = '%s'", | |
28ab034a JG |
440 | (int) app->uid, |
441 | (int) app->pid, | |
442 | app->name); | |
533a90fb FD |
443 | goto error_create_counter_data; |
444 | } | |
445 | ||
446 | for (i = 0; i < entry->nr_counter_cpu_fds; i++) { | |
28ab034a | 447 | ret = lttng_ust_ctl_create_counter_cpu_data(daemon_counter, i, &cpu_counters[i]); |
533a90fb FD |
448 | if (ret) { |
449 | ERR("Failed to create userspace tracer counter cpu data for application user: uid = %d, pid = %d, application name = '%s'", | |
28ab034a JG |
450 | (int) app->uid, |
451 | (int) app->pid, | |
452 | app->name); | |
533a90fb FD |
453 | goto error_create_counter_cpu_data; |
454 | } | |
455 | } | |
456 | ||
457 | entry->daemon_counter = daemon_counter; | |
458 | entry->counter = counter; | |
459 | entry->cpu_counters = cpu_counters; | |
460 | ||
a5a21280 | 461 | lttng_ht_node_init_u64(&entry->node, entry->uid); |
533a90fb FD |
462 | lttng_ht_add_unique_u64(error_counter_uid_ht, &entry->node); |
463 | ||
464 | goto end; | |
465 | ||
466 | error_create_counter_cpu_data: | |
467 | /* Teardown any allocated cpu counters. */ | |
468 | for (i = 0; i < entry->nr_counter_cpu_fds; i++) { | |
469 | if (!cpu_counters[i]) { | |
470 | /* | |
471 | * Early-exit when error occurred before all cpu | |
472 | * counters could be initialized. | |
473 | */ | |
474 | break; | |
475 | } | |
476 | ||
b623cb6a | 477 | lttng_ust_ctl_release_object(-1, cpu_counters[i]); |
533a90fb FD |
478 | free(cpu_counters[i]); |
479 | } | |
480 | ||
b623cb6a | 481 | lttng_ust_ctl_release_object(-1, entry->counter); |
533a90fb FD |
482 | free(entry->counter); |
483 | error_create_counter_data: | |
b623cb6a | 484 | lttng_ust_ctl_destroy_counter(daemon_counter); |
533a90fb FD |
485 | error_create_daemon_counter: |
486 | error_shm_alloc: | |
8f0646a0 | 487 | /* Error occurred before per-cpu SHMs were handed-off to ustctl. */ |
533a90fb FD |
488 | if (cpu_counter_fds) { |
489 | for (i = 0; i < entry->nr_counter_cpu_fds; i++) { | |
490 | if (cpu_counter_fds[i] < 0) { | |
491 | /* | |
492 | * Early-exit when error occurred before all cpu | |
493 | * counter shm fds could be initialized. | |
494 | */ | |
495 | break; | |
496 | } | |
497 | ||
498 | ret = close(cpu_counter_fds[i]); | |
499 | if (ret) { | |
a5a21280 | 500 | PERROR("Failed to close error counter per-CPU shm file descriptor: fd = %d", |
28ab034a | 501 | cpu_counter_fds[i]); |
533a90fb FD |
502 | } |
503 | } | |
504 | } | |
505 | ||
506 | free(cpu_counters); | |
507 | error_counter_cpus_alloc: | |
508 | error_counter_cpu_fds_alloc: | |
509 | free(entry); | |
510 | error: | |
511 | entry = NULL; | |
512 | end: | |
513 | free(cpu_counter_fds); | |
514 | return entry; | |
515 | } | |
516 | ||
28ab034a JG |
517 | static enum event_notifier_error_accounting_status |
518 | send_counter_data_to_ust(struct ust_app *app, struct lttng_ust_abi_object_data *new_counter) | |
533a90fb FD |
519 | { |
520 | int ret; | |
521 | enum event_notifier_error_accounting_status status; | |
522 | ||
523 | /* Attach counter to trigger group. */ | |
524 | pthread_mutex_lock(&app->sock_lock); | |
28ab034a JG |
525 | ret = lttng_ust_ctl_send_counter_data_to_ust( |
526 | app->sock, app->event_notifier_group.object->handle, new_counter); | |
533a90fb FD |
527 | pthread_mutex_unlock(&app->sock_lock); |
528 | if (ret < 0) { | |
529 | if (ret != -EPIPE && ret != -LTTNG_UST_ERR_EXITING) { | |
530 | ERR("Failed to send counter data to application: application name = '%s', pid = %d, ret = %d", | |
28ab034a JG |
531 | app->name, |
532 | app->pid, | |
533 | ret); | |
533a90fb FD |
534 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; |
535 | } else { | |
536 | DBG3("Failed to send counter data to application (application is dead): application name = '%s', pid = %d, ret = %d", | |
28ab034a JG |
537 | app->name, |
538 | app->pid, | |
539 | ret); | |
533a90fb FD |
540 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_APP_DEAD; |
541 | } | |
542 | ||
543 | goto end; | |
544 | } | |
545 | ||
546 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; | |
547 | end: | |
548 | return status; | |
549 | } | |
550 | ||
28ab034a JG |
551 | static enum event_notifier_error_accounting_status |
552 | send_counter_cpu_data_to_ust(struct ust_app *app, | |
553 | struct lttng_ust_abi_object_data *counter, | |
554 | struct lttng_ust_abi_object_data *counter_cpu) | |
533a90fb FD |
555 | { |
556 | int ret; | |
557 | enum event_notifier_error_accounting_status status; | |
558 | ||
559 | pthread_mutex_lock(&app->sock_lock); | |
28ab034a | 560 | ret = lttng_ust_ctl_send_counter_cpu_data_to_ust(app->sock, counter, counter_cpu); |
533a90fb FD |
561 | pthread_mutex_unlock(&app->sock_lock); |
562 | if (ret < 0) { | |
563 | if (ret != -EPIPE && ret != -LTTNG_UST_ERR_EXITING) { | |
564 | ERR("Failed to send counter CPU data to application: application name = '%s', pid = %d, ret = %d", | |
28ab034a JG |
565 | app->name, |
566 | app->pid, | |
567 | ret); | |
533a90fb FD |
568 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; |
569 | } else { | |
570 | DBG3("Failed to send counter CPU data to application: application name = '%s', pid = %d, ret = %d", | |
28ab034a JG |
571 | app->name, |
572 | app->pid, | |
573 | ret); | |
533a90fb FD |
574 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_APP_DEAD; |
575 | } | |
576 | ||
577 | goto end; | |
578 | } | |
579 | ||
580 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; | |
581 | end: | |
582 | return status; | |
583 | } | |
584 | ||
585 | enum event_notifier_error_accounting_status | |
586 | event_notifier_error_accounting_register_app(struct ust_app *app) | |
587 | { | |
588 | int ret; | |
589 | uint64_t i; | |
590 | struct lttng_ust_abi_object_data *new_counter; | |
761ffce2 | 591 | struct ust_error_accounting_entry *entry; |
533a90fb FD |
592 | enum event_notifier_error_accounting_status status; |
593 | struct lttng_ust_abi_object_data **cpu_counters; | |
594 | ||
783db316 MD |
595 | if (!ust_app_supports_counters(app)) { |
596 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_UNSUPPORTED; | |
597 | goto end; | |
598 | } | |
599 | ||
533a90fb FD |
600 | /* |
601 | * Check if we already have a error counter for the user id of this | |
602 | * app. If not, create one. | |
603 | */ | |
604 | rcu_read_lock(); | |
a5a21280 | 605 | entry = ust_error_accounting_entry_find(error_counter_uid_ht, app); |
533a90fb | 606 | if (entry == NULL) { |
a5a21280 FD |
607 | /* |
608 | * Take the event notifier counter lock before creating the new | |
609 | * entry to ensure that no event notifier is registered between | |
610 | * the the entry creation and event notifier count check. | |
611 | */ | |
612 | pthread_mutex_lock(&the_event_notifier_counter.lock); | |
613 | ||
f46376a1 | 614 | entry = ust_error_accounting_entry_create(app); |
533a90fb FD |
615 | if (!entry) { |
616 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; | |
a5a21280 FD |
617 | pthread_mutex_unlock(&the_event_notifier_counter.lock); |
618 | goto error_creating_entry; | |
619 | } | |
620 | ||
621 | /* | |
622 | * We just created a new UID entry, If there are event | |
623 | * notifiers already registered, take one reference on their | |
624 | * behalf. | |
625 | */ | |
626 | if (the_event_notifier_counter.count > 0) { | |
627 | ust_error_accounting_entry_get(entry); | |
533a90fb | 628 | } |
a5a21280 FD |
629 | |
630 | pthread_mutex_unlock(&the_event_notifier_counter.lock); | |
533a90fb FD |
631 | } |
632 | ||
633 | /* Duplicate counter object data. */ | |
28ab034a | 634 | ret = lttng_ust_ctl_duplicate_ust_object_data(&new_counter, entry->counter); |
533a90fb FD |
635 | if (ret) { |
636 | ERR("Failed to duplicate event notifier error accounting counter for application user: application uid = %d, pid = %d, application name = '%s'", | |
28ab034a JG |
637 | (int) app->uid, |
638 | (int) app->pid, | |
639 | app->name); | |
533a90fb | 640 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; |
a5a21280 | 641 | goto error_duplicate_counter; |
533a90fb FD |
642 | } |
643 | ||
644 | status = send_counter_data_to_ust(app, new_counter); | |
645 | if (status != EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK) { | |
cd9c532c FD |
646 | if (status == EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_APP_DEAD) { |
647 | goto error_send_counter_data; | |
648 | } | |
649 | ||
533a90fb | 650 | ERR("Failed to send counter data to application tracer: status = %s, application uid = %d, pid = %d, application name = '%s'", |
28ab034a JG |
651 | error_accounting_status_str(status), |
652 | (int) app->uid, | |
653 | (int) app->pid, | |
654 | app->name); | |
533a90fb FD |
655 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; |
656 | goto error_send_counter_data; | |
657 | } | |
658 | ||
64803277 | 659 | cpu_counters = calloc<lttng_ust_abi_object_data *>(entry->nr_counter_cpu_fds); |
533a90fb FD |
660 | if (!cpu_counters) { |
661 | 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 |
662 | (int) app->uid, |
663 | app->name, | |
664 | (int) app->pid, | |
665 | entry->nr_counter_cpu_fds * sizeof(**cpu_counters)); | |
533a90fb FD |
666 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NOMEM; |
667 | goto error_allocate_cpu_counters; | |
668 | } | |
669 | ||
670 | for (i = 0; i < entry->nr_counter_cpu_fds; i++) { | |
671 | struct lttng_ust_abi_object_data *new_counter_cpu = NULL; | |
672 | ||
b623cb6a | 673 | ret = lttng_ust_ctl_duplicate_ust_object_data(&new_counter_cpu, |
28ab034a | 674 | entry->cpu_counters[i]); |
533a90fb FD |
675 | if (ret) { |
676 | ERR("Failed to duplicate userspace tracer counter cpu data for application user: uid = %d, pid = %d, application name = '%s'", | |
28ab034a JG |
677 | (int) app->uid, |
678 | (int) app->pid, | |
679 | app->name); | |
533a90fb FD |
680 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NOMEM; |
681 | goto error_duplicate_cpu_counter; | |
682 | } | |
683 | ||
684 | cpu_counters[i] = new_counter_cpu; | |
685 | ||
28ab034a | 686 | status = send_counter_cpu_data_to_ust(app, new_counter, new_counter_cpu); |
533a90fb | 687 | if (status != EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK) { |
cd9c532c FD |
688 | if (status == EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_APP_DEAD) { |
689 | goto error_send_cpu_counter_data; | |
690 | } | |
691 | ||
533a90fb | 692 | ERR("Failed to send counter cpu data to application tracer: status = %s, application uid = %d, pid = %d, application name = '%s'", |
28ab034a JG |
693 | error_accounting_status_str(status), |
694 | (int) app->uid, | |
695 | (int) app->pid, | |
696 | app->name); | |
533a90fb FD |
697 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; |
698 | goto error_send_cpu_counter_data; | |
699 | } | |
700 | } | |
701 | ||
702 | app->event_notifier_group.counter = new_counter; | |
703 | new_counter = NULL; | |
704 | app->event_notifier_group.nr_counter_cpu = entry->nr_counter_cpu_fds; | |
705 | app->event_notifier_group.counter_cpu = cpu_counters; | |
706 | cpu_counters = NULL; | |
783db316 | 707 | goto end_unlock; |
533a90fb | 708 | |
533a90fb FD |
709 | error_send_cpu_counter_data: |
710 | error_duplicate_cpu_counter: | |
711 | /* Teardown any duplicated cpu counters. */ | |
712 | for (i = 0; i < entry->nr_counter_cpu_fds; i++) { | |
713 | if (!cpu_counters[i]) { | |
714 | /* | |
715 | * Early-exit when error occurred before all cpu | |
716 | * counters could be initialized. | |
717 | */ | |
718 | break; | |
719 | } | |
720 | ||
b623cb6a | 721 | lttng_ust_ctl_release_object(-1, cpu_counters[i]); |
533a90fb FD |
722 | free(cpu_counters[i]); |
723 | } | |
724 | ||
a55f8ad1 JG |
725 | free(cpu_counters); |
726 | ||
5d650dcd | 727 | error_allocate_cpu_counters: |
533a90fb | 728 | error_send_counter_data: |
b623cb6a | 729 | lttng_ust_ctl_release_object(-1, new_counter); |
533a90fb | 730 | free(new_counter); |
a5a21280 FD |
731 | error_duplicate_counter: |
732 | ust_error_accounting_entry_put(entry); | |
733 | error_creating_entry: | |
734 | app->event_notifier_group.counter = NULL; | |
783db316 | 735 | end_unlock: |
533a90fb | 736 | rcu_read_unlock(); |
783db316 | 737 | end: |
533a90fb FD |
738 | return status; |
739 | } | |
740 | ||
741 | enum event_notifier_error_accounting_status | |
742 | event_notifier_error_accounting_unregister_app(struct ust_app *app) | |
743 | { | |
744 | enum event_notifier_error_accounting_status status; | |
761ffce2 | 745 | struct ust_error_accounting_entry *entry; |
533a90fb FD |
746 | int i; |
747 | ||
748 | rcu_read_lock(); | |
a5a21280 FD |
749 | |
750 | /* If an error occurred during app registration no entry was created. */ | |
751 | if (!app->event_notifier_group.counter) { | |
752 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; | |
753 | goto end; | |
754 | } | |
755 | ||
756 | entry = ust_error_accounting_entry_find(error_counter_uid_ht, app); | |
533a90fb FD |
757 | if (entry == NULL) { |
758 | ERR("Failed to find event notitifier error accounting entry on application teardown: pid = %d, application name = '%s'", | |
28ab034a JG |
759 | app->pid, |
760 | app->name); | |
533a90fb FD |
761 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; |
762 | goto end; | |
a5a21280 FD |
763 | } else { |
764 | /* | |
765 | * Put the entry twice as we acquired a reference from the | |
766 | * `ust_error_accounting_entry_find()` above. | |
767 | */ | |
768 | ust_error_accounting_entry_put(entry); | |
769 | ust_error_accounting_entry_put(entry); | |
533a90fb FD |
770 | } |
771 | ||
772 | for (i = 0; i < app->event_notifier_group.nr_counter_cpu; i++) { | |
28ab034a | 773 | lttng_ust_ctl_release_object(app->sock, app->event_notifier_group.counter_cpu[i]); |
533a90fb FD |
774 | free(app->event_notifier_group.counter_cpu[i]); |
775 | } | |
776 | ||
777 | free(app->event_notifier_group.counter_cpu); | |
778 | ||
b623cb6a | 779 | lttng_ust_ctl_release_object(app->sock, app->event_notifier_group.counter); |
533a90fb FD |
780 | free(app->event_notifier_group.counter); |
781 | ||
782 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; | |
783 | end: | |
784 | rcu_read_unlock(); | |
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 | |
533a90fb FD |
800 | rcu_read_lock(); |
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: | |
860 | rcu_read_unlock(); | |
861 | return status; | |
862 | } | |
863 | ||
28ab034a JG |
864 | static enum event_notifier_error_accounting_status |
865 | event_notifier_error_accounting_ust_clear(const struct lttng_trigger *trigger) | |
533a90fb FD |
866 | { |
867 | struct lttng_ht_iter iter; | |
761ffce2 | 868 | struct ust_error_accounting_entry *uid_entry; |
533a90fb FD |
869 | uint64_t error_counter_index; |
870 | enum event_notifier_error_accounting_status status; | |
871 | size_t dimension_index; | |
872 | const uint64_t tracer_token = lttng_trigger_get_tracer_token(trigger); | |
873 | ||
533a90fb | 874 | rcu_read_lock(); |
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: | |
918 | rcu_read_unlock(); | |
919 | return status; | |
920 | } | |
921 | #endif /* HAVE_LIBLTTNG_UST_CTL */ | |
922 | ||
28ab034a JG |
923 | static enum event_notifier_error_accounting_status |
924 | event_notifier_error_accounting_kernel_clear(const struct lttng_trigger *trigger) | |
90aa04a1 FD |
925 | { |
926 | int ret; | |
927 | uint64_t error_counter_index; | |
928 | enum event_notifier_error_accounting_status status; | |
b8e2fb80 | 929 | struct lttng_kernel_abi_counter_clear counter_clear = {}; |
90aa04a1 | 930 | |
28ab034a JG |
931 | status = get_error_counter_index_for_token( |
932 | &kernel_state, lttng_trigger_get_tracer_token(trigger), &error_counter_index); | |
90aa04a1 FD |
933 | if (status != EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK) { |
934 | uid_t trigger_owner_uid; | |
935 | const char *trigger_name; | |
90aa04a1 | 936 | |
28ab034a | 937 | get_trigger_info_for_log(trigger, &trigger_name, &trigger_owner_uid); |
533a90fb FD |
938 | |
939 | ERR("Failed to get event notifier error counter index: trigger owner uid = %d, trigger name = '%s', status = '%s'", | |
28ab034a JG |
940 | trigger_owner_uid, |
941 | trigger_name, | |
942 | error_accounting_status_str(status)); | |
90aa04a1 FD |
943 | goto end; |
944 | } | |
945 | ||
946 | counter_clear.index.number_dimensions = 1; | |
947 | counter_clear.index.dimension_indexes[0] = error_counter_index; | |
948 | ||
28ab034a | 949 | ret = kernctl_counter_clear(kernel_error_accounting_entry.error_counter_fd, &counter_clear); |
90aa04a1 | 950 | if (ret) { |
533a90fb FD |
951 | uid_t trigger_owner_uid; |
952 | const char *trigger_name; | |
953 | ||
28ab034a | 954 | get_trigger_info_for_log(trigger, &trigger_name, &trigger_owner_uid); |
533a90fb FD |
955 | |
956 | ERR("Failed to clear kernel event notifier error counter: trigger owner uid = %d, trigger name = '%s'", | |
28ab034a JG |
957 | trigger_owner_uid, |
958 | trigger_name); | |
90aa04a1 FD |
959 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; |
960 | goto end; | |
961 | } | |
962 | ||
963 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; | |
964 | end: | |
965 | return status; | |
966 | } | |
967 | ||
968 | enum event_notifier_error_accounting_status | |
28ab034a | 969 | event_notifier_error_accounting_register_kernel(int kernel_event_notifier_group_fd) |
90aa04a1 FD |
970 | { |
971 | int error_counter_fd = -1, ret; | |
972 | enum event_notifier_error_accounting_status status; | |
7966af57 | 973 | lttng_kernel_abi_counter_conf error_counter_conf = { |
b8e2fb80 | 974 | .arithmetic = LTTNG_KERNEL_ABI_COUNTER_ARITHMETIC_MODULAR, |
90aa04a1 | 975 | .bitness = sizeof(void *) == sizeof(uint32_t) ? |
28ab034a JG |
976 | LTTNG_KERNEL_ABI_COUNTER_BITNESS_32 : |
977 | LTTNG_KERNEL_ABI_COUNTER_BITNESS_64, | |
90aa04a1 | 978 | .number_dimensions = 1, |
7966af57 | 979 | .global_sum_step = 0, |
1c9a0b0e MJ |
980 | .dimensions = {}, |
981 | .coalesce_hits = 0, | |
982 | .padding = {}, | |
90aa04a1 | 983 | }; |
7966af57 SM |
984 | error_counter_conf.dimensions[0].size = kernel_state.number_indices; |
985 | error_counter_conf.dimensions[0].has_underflow = false; | |
986 | error_counter_conf.dimensions[0].has_overflow = false; | |
90aa04a1 | 987 | |
28ab034a JG |
988 | ret = kernctl_create_event_notifier_group_error_counter(kernel_event_notifier_group_fd, |
989 | &error_counter_conf); | |
90aa04a1 FD |
990 | if (ret < 0) { |
991 | PERROR("Failed to create event notifier group error counter through kernel ioctl: kernel_event_notifier_group_fd = %d", | |
28ab034a | 992 | kernel_event_notifier_group_fd); |
90aa04a1 FD |
993 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; |
994 | goto error; | |
995 | } | |
996 | ||
997 | error_counter_fd = ret; | |
998 | ||
999 | /* Prevent fd duplication after execlp(). */ | |
1000 | ret = fcntl(error_counter_fd, F_SETFD, FD_CLOEXEC); | |
1001 | if (ret < 0) { | |
1002 | PERROR("Failed to set FD_CLOEXEC flag on event notifier error counter file descriptor: error_counter_fd = %d", | |
28ab034a | 1003 | error_counter_fd); |
90aa04a1 FD |
1004 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; |
1005 | goto error; | |
1006 | } | |
1007 | ||
28ab034a | 1008 | DBG("Created kernel event notifier group error counter: fd = %d", error_counter_fd); |
90aa04a1 | 1009 | |
28ab034a | 1010 | kernel_error_accounting_entry.error_counter_fd = error_counter_fd; |
90aa04a1 FD |
1011 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; |
1012 | ||
1013 | error: | |
1014 | return status; | |
1015 | } | |
1016 | ||
28ab034a JG |
1017 | static enum event_notifier_error_accounting_status create_error_counter_index_for_token( |
1018 | struct error_accounting_state *state, uint64_t tracer_token, uint64_t *error_counter_index) | |
90aa04a1 FD |
1019 | { |
1020 | struct index_ht_entry *index_entry; | |
1021 | enum lttng_index_allocator_status index_alloc_status; | |
1022 | uint64_t local_error_counter_index; | |
1023 | enum event_notifier_error_accounting_status status; | |
1024 | ||
a0377dfe | 1025 | LTTNG_ASSERT(state); |
761ffce2 | 1026 | |
90aa04a1 | 1027 | /* Allocate a new index for that counter. */ |
28ab034a JG |
1028 | index_alloc_status = |
1029 | lttng_index_allocator_alloc(state->index_allocator, &local_error_counter_index); | |
90aa04a1 FD |
1030 | switch (index_alloc_status) { |
1031 | case LTTNG_INDEX_ALLOCATOR_STATUS_EMPTY: | |
1032 | DBG("No indices left in the configured event notifier error counter: " | |
28ab034a JG |
1033 | "number-of-indices = %" PRIu64, |
1034 | lttng_index_allocator_get_index_count(state->index_allocator)); | |
90aa04a1 FD |
1035 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NO_INDEX_AVAILABLE; |
1036 | goto end; | |
1037 | case LTTNG_INDEX_ALLOCATOR_STATUS_OK: | |
1038 | break; | |
1039 | default: | |
1040 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; | |
1041 | goto end; | |
1042 | } | |
1043 | ||
64803277 | 1044 | index_entry = zmalloc<index_ht_entry>(); |
90aa04a1 FD |
1045 | if (index_entry == NULL) { |
1046 | PERROR("Failed to allocate event notifier error counter hash table entry"); | |
1047 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NOMEM; | |
1048 | goto end; | |
1049 | } | |
1050 | ||
1051 | index_entry->error_counter_index = local_error_counter_index; | |
1052 | lttng_ht_node_init_u64(&index_entry->node, tracer_token); | |
761ffce2 | 1053 | lttng_ht_add_unique_u64(state->indices_ht, &index_entry->node); |
90aa04a1 | 1054 | |
28ab034a JG |
1055 | DBG("Allocated error counter index for tracer token: tracer token = %" PRIu64 |
1056 | ", index = %" PRIu64, | |
1057 | tracer_token, | |
1058 | local_error_counter_index); | |
90aa04a1 FD |
1059 | *error_counter_index = local_error_counter_index; |
1060 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; | |
1061 | end: | |
1062 | return status; | |
1063 | } | |
1064 | ||
1065 | enum event_notifier_error_accounting_status | |
28ab034a JG |
1066 | event_notifier_error_accounting_register_event_notifier(const struct lttng_trigger *trigger, |
1067 | uint64_t *error_counter_index) | |
90aa04a1 FD |
1068 | { |
1069 | enum event_notifier_error_accounting_status status; | |
1070 | uint64_t local_error_counter_index; | |
761ffce2 FD |
1071 | struct error_accounting_state *state; |
1072 | ||
1073 | switch (lttng_trigger_get_underlying_domain_type_restriction(trigger)) { | |
1074 | case LTTNG_DOMAIN_KERNEL: | |
1075 | state = &kernel_state; | |
1076 | break; | |
1077 | case LTTNG_DOMAIN_UST: | |
496fc78f FD |
1078 | case LTTNG_DOMAIN_PYTHON: |
1079 | case LTTNG_DOMAIN_JUL: | |
1080 | case LTTNG_DOMAIN_LOG4J: | |
761ffce2 FD |
1081 | state = &ust_state; |
1082 | break; | |
1083 | default: | |
1084 | abort(); | |
1085 | } | |
90aa04a1 FD |
1086 | |
1087 | /* | |
1088 | * Check if this event notifier already has a error counter index | |
1089 | * assigned. | |
1090 | */ | |
28ab034a JG |
1091 | status = get_error_counter_index_for_token( |
1092 | state, lttng_trigger_get_tracer_token(trigger), &local_error_counter_index); | |
90aa04a1 FD |
1093 | switch (status) { |
1094 | case EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NOT_FOUND: | |
1095 | { | |
1096 | uid_t trigger_owner_uid; | |
1097 | const char *trigger_name; | |
90aa04a1 | 1098 | |
28ab034a | 1099 | get_trigger_info_for_log(trigger, &trigger_name, &trigger_owner_uid); |
533a90fb FD |
1100 | |
1101 | 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 |
1102 | trigger_name, |
1103 | trigger_owner_uid, | |
1104 | lttng_trigger_get_tracer_token(trigger)); | |
533a90fb | 1105 | |
28ab034a JG |
1106 | status = create_error_counter_index_for_token( |
1107 | state, lttng_trigger_get_tracer_token(trigger), &local_error_counter_index); | |
90aa04a1 | 1108 | if (status != EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK) { |
533a90fb | 1109 | ERR("Error creating index for token: status = %s, trigger name = '%s', trigger owner uid = %d", |
28ab034a JG |
1110 | error_accounting_status_str(status), |
1111 | trigger_name, | |
1112 | trigger_owner_uid); | |
90aa04a1 FD |
1113 | goto end; |
1114 | } | |
90aa04a1 | 1115 | } |
30eb3927 | 1116 | /* fall-through. */ |
90aa04a1 FD |
1117 | case EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK: |
1118 | *error_counter_index = local_error_counter_index; | |
1119 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; | |
1120 | break; | |
1121 | default: | |
1122 | break; | |
1123 | } | |
1124 | ||
a5a21280 FD |
1125 | #ifdef HAVE_LIBLTTNG_UST_CTL |
1126 | switch (lttng_trigger_get_underlying_domain_type_restriction(trigger)) { | |
1127 | case LTTNG_DOMAIN_UST: | |
496fc78f FD |
1128 | case LTTNG_DOMAIN_PYTHON: |
1129 | case LTTNG_DOMAIN_JUL: | |
1130 | case LTTNG_DOMAIN_LOG4J: | |
a5a21280 FD |
1131 | pthread_mutex_lock(&the_event_notifier_counter.lock); |
1132 | the_event_notifier_counter.count++; | |
1133 | if (the_event_notifier_counter.count == 1) { | |
1134 | /* | |
1135 | * On the first event notifier, we get a reference to | |
1136 | * every existing UID entries. This ensures that the | |
1137 | * entries are kept around if there are still | |
1138 | * registered event notifiers but no apps. | |
1139 | */ | |
1140 | get_ref_all_ust_error_accounting_entry(); | |
1141 | } | |
1142 | pthread_mutex_unlock(&the_event_notifier_counter.lock); | |
1143 | break; | |
1144 | default: | |
1145 | break; | |
1146 | } | |
1147 | #endif /* HAVE_LIBLTTNG_UST_CTL */ | |
1148 | ||
90aa04a1 FD |
1149 | end: |
1150 | return status; | |
1151 | } | |
1152 | ||
28ab034a JG |
1153 | static enum event_notifier_error_accounting_status |
1154 | event_notifier_error_accounting_kernel_get_count(const struct lttng_trigger *trigger, | |
1155 | uint64_t *count) | |
90aa04a1 | 1156 | { |
b8e2fb80 | 1157 | struct lttng_kernel_abi_counter_aggregate counter_aggregate = {}; |
90aa04a1 FD |
1158 | enum event_notifier_error_accounting_status status; |
1159 | uint64_t error_counter_index; | |
1160 | int ret; | |
1161 | ||
28ab034a JG |
1162 | status = get_error_counter_index_for_token( |
1163 | &kernel_state, lttng_trigger_get_tracer_token(trigger), &error_counter_index); | |
90aa04a1 | 1164 | if (status != EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK) { |
533a90fb | 1165 | ERR("Error getting index for token: status=%s", |
28ab034a | 1166 | error_accounting_status_str(status)); |
90aa04a1 FD |
1167 | goto end; |
1168 | } | |
1169 | ||
1170 | counter_aggregate.index.number_dimensions = 1; | |
1171 | counter_aggregate.index.dimension_indexes[0] = error_counter_index; | |
1172 | ||
a0377dfe | 1173 | LTTNG_ASSERT(kernel_error_accounting_entry.error_counter_fd); |
90aa04a1 | 1174 | |
28ab034a JG |
1175 | ret = kernctl_counter_get_aggregate_value(kernel_error_accounting_entry.error_counter_fd, |
1176 | &counter_aggregate); | |
90aa04a1 FD |
1177 | if (ret || counter_aggregate.value.value < 0) { |
1178 | uid_t trigger_owner_uid; | |
1179 | const char *trigger_name; | |
533a90fb | 1180 | |
28ab034a | 1181 | get_trigger_info_for_log(trigger, &trigger_name, &trigger_owner_uid); |
90aa04a1 FD |
1182 | |
1183 | if (counter_aggregate.value.value < 0) { | |
1184 | ERR("Invalid negative event notifier error counter value: trigger owner = %d, trigger name = '%s', value = %" PRId64, | |
28ab034a JG |
1185 | trigger_owner_uid, |
1186 | trigger_name, | |
1187 | counter_aggregate.value.value); | |
90aa04a1 FD |
1188 | } else { |
1189 | ERR("Failed to getting event notifier error count: trigger owner = %d, trigger name = '%s', ret = %d", | |
28ab034a JG |
1190 | trigger_owner_uid, |
1191 | trigger_name, | |
1192 | ret); | |
90aa04a1 FD |
1193 | } |
1194 | ||
1195 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; | |
1196 | goto end; | |
1197 | } | |
1198 | ||
1199 | /* Error count can't be negative. */ | |
a0377dfe | 1200 | LTTNG_ASSERT(counter_aggregate.value.value >= 0); |
90aa04a1 FD |
1201 | *count = (uint64_t) counter_aggregate.value.value; |
1202 | ||
1203 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; | |
1204 | ||
1205 | end: | |
1206 | return status; | |
1207 | } | |
1208 | ||
1209 | enum event_notifier_error_accounting_status | |
28ab034a | 1210 | event_notifier_error_accounting_get_count(const struct lttng_trigger *trigger, uint64_t *count) |
90aa04a1 FD |
1211 | { |
1212 | switch (lttng_trigger_get_underlying_domain_type_restriction(trigger)) { | |
1213 | case LTTNG_DOMAIN_KERNEL: | |
28ab034a | 1214 | return event_notifier_error_accounting_kernel_get_count(trigger, count); |
90aa04a1 | 1215 | case LTTNG_DOMAIN_UST: |
496fc78f FD |
1216 | case LTTNG_DOMAIN_PYTHON: |
1217 | case LTTNG_DOMAIN_JUL: | |
1218 | case LTTNG_DOMAIN_LOG4J: | |
533a90fb | 1219 | #ifdef HAVE_LIBLTTNG_UST_CTL |
28ab034a | 1220 | return event_notifier_error_accounting_ust_get_count(trigger, count); |
533a90fb | 1221 | #else |
43cee6f9 | 1222 | *count = 0; |
90aa04a1 | 1223 | return EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; |
533a90fb | 1224 | #endif /* HAVE_LIBLTTNG_UST_CTL */ |
90aa04a1 FD |
1225 | default: |
1226 | abort(); | |
1227 | } | |
1228 | } | |
1229 | ||
28ab034a | 1230 | static enum event_notifier_error_accounting_status |
90aa04a1 FD |
1231 | event_notifier_error_accounting_clear(const struct lttng_trigger *trigger) |
1232 | { | |
1233 | switch (lttng_trigger_get_underlying_domain_type_restriction(trigger)) { | |
1234 | case LTTNG_DOMAIN_KERNEL: | |
1235 | return event_notifier_error_accounting_kernel_clear(trigger); | |
1236 | case LTTNG_DOMAIN_UST: | |
496fc78f FD |
1237 | case LTTNG_DOMAIN_PYTHON: |
1238 | case LTTNG_DOMAIN_JUL: | |
1239 | case LTTNG_DOMAIN_LOG4J: | |
533a90fb FD |
1240 | #ifdef HAVE_LIBLTTNG_UST_CTL |
1241 | return event_notifier_error_accounting_ust_clear(trigger); | |
1242 | #else | |
90aa04a1 | 1243 | return EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; |
533a90fb | 1244 | #endif /* HAVE_LIBLTTNG_UST_CTL */ |
90aa04a1 FD |
1245 | default: |
1246 | abort(); | |
1247 | } | |
1248 | } | |
1249 | ||
1250 | static void free_index_ht_entry(struct rcu_head *head) | |
1251 | { | |
28ab034a | 1252 | struct index_ht_entry *entry = caa_container_of(head, struct index_ht_entry, rcu_head); |
90aa04a1 FD |
1253 | |
1254 | free(entry); | |
1255 | } | |
1256 | ||
28ab034a | 1257 | void event_notifier_error_accounting_unregister_event_notifier(const struct lttng_trigger *trigger) |
90aa04a1 FD |
1258 | { |
1259 | struct lttng_ht_iter iter; | |
1260 | struct lttng_ht_node_u64 *node; | |
533a90fb | 1261 | const uint64_t tracer_token = lttng_trigger_get_tracer_token(trigger); |
90aa04a1 | 1262 | enum event_notifier_error_accounting_status status; |
761ffce2 | 1263 | struct error_accounting_state *state; |
90aa04a1 FD |
1264 | |
1265 | status = event_notifier_error_accounting_clear(trigger); | |
1266 | if (status != EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK) { | |
533a90fb FD |
1267 | /* Trigger details already logged by callee on error. */ |
1268 | ERR("Failed to clear event notifier error counter during unregistration of event notifier: status = '%s'", | |
28ab034a | 1269 | error_accounting_status_str(status)); |
a5a21280 | 1270 | goto end; |
90aa04a1 FD |
1271 | } |
1272 | ||
a5a21280 FD |
1273 | rcu_read_lock(); |
1274 | ||
761ffce2 FD |
1275 | switch (lttng_trigger_get_underlying_domain_type_restriction(trigger)) { |
1276 | case LTTNG_DOMAIN_KERNEL: | |
1277 | state = &kernel_state; | |
1278 | break; | |
a5a21280 | 1279 | #ifdef HAVE_LIBLTTNG_UST_CTL |
761ffce2 | 1280 | case LTTNG_DOMAIN_UST: |
496fc78f FD |
1281 | case LTTNG_DOMAIN_PYTHON: |
1282 | case LTTNG_DOMAIN_JUL: | |
1283 | case LTTNG_DOMAIN_LOG4J: | |
761ffce2 | 1284 | state = &ust_state; |
a5a21280 FD |
1285 | |
1286 | pthread_mutex_lock(&the_event_notifier_counter.lock); | |
1287 | the_event_notifier_counter.count--; | |
1288 | if (the_event_notifier_counter.count == 0) { | |
a5a21280 FD |
1289 | /* |
1290 | * When unregistering the last event notifier, put one | |
1291 | * reference to every uid entries on the behalf of all | |
1292 | * event notifiers. | |
1293 | */ | |
1294 | put_ref_all_ust_error_accounting_entry(); | |
1295 | } | |
1296 | ||
1297 | pthread_mutex_unlock(&the_event_notifier_counter.lock); | |
1298 | ||
761ffce2 | 1299 | break; |
a5a21280 | 1300 | #endif /* HAVE_LIBLTTNG_UST_CTL */ |
761ffce2 FD |
1301 | default: |
1302 | abort(); | |
1303 | } | |
1304 | ||
761ffce2 | 1305 | lttng_ht_lookup(state->indices_ht, &tracer_token, &iter); |
90aa04a1 | 1306 | node = lttng_ht_iter_get_node_u64(&iter); |
533a90fb | 1307 | if (node) { |
44d0e2f1 | 1308 | int del_ret; |
0114db0e | 1309 | struct index_ht_entry *index_entry = |
28ab034a | 1310 | lttng::utils::container_of(node, &index_ht_entry::node); |
533a90fb FD |
1311 | enum lttng_index_allocator_status index_alloc_status; |
1312 | ||
90aa04a1 | 1313 | index_alloc_status = lttng_index_allocator_release( |
28ab034a | 1314 | state->index_allocator, index_entry->error_counter_index); |
90aa04a1 | 1315 | if (index_alloc_status != LTTNG_INDEX_ALLOCATOR_STATUS_OK) { |
533a90fb FD |
1316 | uid_t trigger_owner_uid; |
1317 | const char *trigger_name; | |
1318 | ||
28ab034a | 1319 | get_trigger_info_for_log(trigger, &trigger_name, &trigger_owner_uid); |
533a90fb | 1320 | |
28ab034a JG |
1321 | ERR("Failed to release event notifier error counter index: index = %" PRIu64 |
1322 | ", trigger name = '%s', trigger owner uid = %d", | |
1323 | index_entry->error_counter_index, | |
1324 | trigger_name, | |
1325 | (int) trigger_owner_uid); | |
533a90fb | 1326 | /* Don't exit, perform the rest of the clean-up. */ |
90aa04a1 FD |
1327 | } |
1328 | ||
761ffce2 | 1329 | del_ret = lttng_ht_del(state->indices_ht, &iter); |
a0377dfe | 1330 | LTTNG_ASSERT(!del_ret); |
90aa04a1 FD |
1331 | call_rcu(&index_entry->rcu_head, free_index_ht_entry); |
1332 | } | |
1333 | ||
a5a21280 | 1334 | end: |
90aa04a1 FD |
1335 | rcu_read_unlock(); |
1336 | } | |
1337 | ||
1338 | void event_notifier_error_accounting_fini(void) | |
1339 | { | |
a5a21280 FD |
1340 | if (kernel_error_accounting_entry.error_counter_fd) { |
1341 | const int ret = close(kernel_error_accounting_entry.error_counter_fd); | |
90aa04a1 FD |
1342 | |
1343 | if (ret) { | |
1344 | PERROR("Failed to close kernel event notifier error counter"); | |
1345 | } | |
1346 | } | |
1347 | ||
533a90fb FD |
1348 | lttng_ht_destroy(error_counter_uid_ht); |
1349 | ||
761ffce2 FD |
1350 | fini_error_accounting_state(&kernel_state); |
1351 | fini_error_accounting_state(&ust_state); | |
90aa04a1 | 1352 | } |