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 | |
07c4863f | 158 | const 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 | 176 | { |
a5a21280 FD |
177 | ASSERT_LOCKED(the_event_notifier_counter.lock); |
178 | ||
cad5fc86 JG |
179 | for (auto *uid_entry : |
180 | lttng::urcu::lfht_iteration_adapter<ust_error_accounting_entry, | |
181 | decltype(ust_error_accounting_entry::node), | |
182 | &ust_error_accounting_entry::node>( | |
183 | *error_counter_uid_ht->ht)) { | |
184 | ust_error_accounting_entry_put(uid_entry); | |
56047f5a | 185 | } |
a5a21280 FD |
186 | } |
187 | ||
188 | /* | |
189 | * Get one reference to every UID entries. | |
190 | */ | |
cd9adb8b | 191 | static void get_ref_all_ust_error_accounting_entry() |
a5a21280 | 192 | { |
a5a21280 FD |
193 | ASSERT_LOCKED(the_event_notifier_counter.lock); |
194 | ||
cad5fc86 JG |
195 | for (auto *uid_entry : |
196 | lttng::urcu::lfht_iteration_adapter<ust_error_accounting_entry, | |
197 | decltype(ust_error_accounting_entry::node), | |
198 | &ust_error_accounting_entry::node>( | |
199 | *error_counter_uid_ht->ht)) { | |
200 | ust_error_accounting_entry_get(uid_entry); | |
56047f5a | 201 | } |
a5a21280 FD |
202 | } |
203 | ||
204 | #endif /* HAVE_LIBLTTNG_UST_CTL */ | |
205 | ||
28ab034a JG |
206 | static enum event_notifier_error_accounting_status |
207 | init_error_accounting_state(struct error_accounting_state *state, uint64_t index_count) | |
90aa04a1 FD |
208 | { |
209 | enum event_notifier_error_accounting_status status; | |
210 | ||
a0377dfe | 211 | LTTNG_ASSERT(state); |
761ffce2 FD |
212 | |
213 | state->number_indices = index_count; | |
214 | ||
215 | state->index_allocator = lttng_index_allocator_create(index_count); | |
216 | if (!state->index_allocator) { | |
217 | ERR("Failed to allocate event notifier error counter index allocator"); | |
90aa04a1 | 218 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NOMEM; |
761ffce2 | 219 | goto end; |
90aa04a1 FD |
220 | } |
221 | ||
28ab034a | 222 | state->indices_ht = lttng_ht_new(ERROR_COUNTER_INDEX_HT_INITIAL_SIZE, LTTNG_HT_TYPE_U64); |
761ffce2 | 223 | if (!state->indices_ht) { |
533a90fb FD |
224 | ERR("Failed to allocate error counter indices hash table"); |
225 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NOMEM; | |
761ffce2 FD |
226 | goto error_indices_ht; |
227 | } | |
228 | ||
229 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; | |
230 | goto end; | |
231 | ||
232 | error_indices_ht: | |
233 | lttng_index_allocator_destroy(state->index_allocator); | |
cd9adb8b | 234 | state->index_allocator = nullptr; |
761ffce2 FD |
235 | end: |
236 | return status; | |
237 | } | |
238 | ||
28ab034a | 239 | static void fini_error_accounting_state(struct error_accounting_state *state) |
761ffce2 | 240 | { |
a0377dfe | 241 | LTTNG_ASSERT(state); |
761ffce2 FD |
242 | |
243 | /* | |
244 | * Will assert if some error counter indices were not released (an | |
245 | * internal error). | |
246 | */ | |
247 | lttng_ht_destroy(state->indices_ht); | |
248 | lttng_index_allocator_destroy(state->index_allocator); | |
249 | } | |
250 | ||
251 | enum event_notifier_error_accounting_status | |
28ab034a | 252 | event_notifier_error_accounting_init(uint64_t buffer_size_kernel, uint64_t buffer_size_ust) |
761ffce2 FD |
253 | { |
254 | enum event_notifier_error_accounting_status status; | |
255 | ||
256 | status = init_error_accounting_state(&kernel_state, buffer_size_kernel); | |
257 | if (status != EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK) { | |
258 | ERR("Failed to initialize kernel event notifier accounting state: status = %s", | |
28ab034a | 259 | error_accounting_status_str(status)); |
761ffce2 FD |
260 | goto end; |
261 | } | |
262 | ||
263 | status = init_error_accounting_state(&ust_state, buffer_size_ust); | |
264 | if (status != EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK) { | |
265 | ERR("Failed to initialize UST event notifier accounting state: status = %s", | |
28ab034a | 266 | error_accounting_status_str(status)); |
761ffce2 | 267 | goto error_ust_state; |
533a90fb FD |
268 | } |
269 | ||
28ab034a | 270 | error_counter_uid_ht = lttng_ht_new(ERROR_COUNTER_INDEX_HT_INITIAL_SIZE, LTTNG_HT_TYPE_U64); |
533a90fb FD |
271 | if (!error_counter_uid_ht) { |
272 | ERR("Failed to allocate UID to error counter accountant hash table"); | |
90aa04a1 | 273 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NOMEM; |
761ffce2 | 274 | goto error_uid_ht; |
90aa04a1 FD |
275 | } |
276 | ||
90aa04a1 | 277 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; |
761ffce2 | 278 | goto end; |
90aa04a1 | 279 | |
761ffce2 FD |
280 | error_uid_ht: |
281 | fini_error_accounting_state(&ust_state); | |
282 | error_ust_state: | |
283 | fini_error_accounting_state(&kernel_state); | |
284 | end: | |
90aa04a1 FD |
285 | return status; |
286 | } | |
287 | ||
a5a21280 FD |
288 | /* |
289 | * Return the error counteur index associated to this event notifier tracer | |
290 | * token. Returns _STATUS_OK if found and _STATUS_NOT_FOUND otherwise. | |
291 | */ | |
28ab034a JG |
292 | static enum event_notifier_error_accounting_status get_error_counter_index_for_token( |
293 | struct error_accounting_state *state, uint64_t tracer_token, uint64_t *error_counter_index) | |
90aa04a1 FD |
294 | { |
295 | struct lttng_ht_node_u64 *node; | |
296 | struct lttng_ht_iter iter; | |
297 | const struct index_ht_entry *index_entry; | |
298 | enum event_notifier_error_accounting_status status; | |
07c4863f | 299 | const lttng::urcu::read_lock_guard read_guard; |
90aa04a1 | 300 | |
761ffce2 | 301 | lttng_ht_lookup(state->indices_ht, &tracer_token, &iter); |
00d7d903 | 302 | node = lttng_ht_iter_get_node<lttng_ht_node_u64>(&iter); |
90aa04a1 | 303 | if (node) { |
0114db0e | 304 | index_entry = lttng::utils::container_of(node, &index_ht_entry::node); |
90aa04a1 FD |
305 | *error_counter_index = index_entry->error_counter_index; |
306 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; | |
307 | } else { | |
308 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NOT_FOUND; | |
309 | } | |
310 | ||
90aa04a1 FD |
311 | return status; |
312 | } | |
313 | ||
533a90fb | 314 | #ifdef HAVE_LIBLTTNG_UST_CTL |
a5a21280 FD |
315 | /* |
316 | * Find the entry for this app's UID, the caller acquires a reference if the | |
317 | * entry is found. | |
318 | */ | |
28ab034a JG |
319 | static struct ust_error_accounting_entry *ust_error_accounting_entry_find(struct lttng_ht *uid_ht, |
320 | const struct ust_app *app) | |
533a90fb | 321 | { |
761ffce2 | 322 | struct ust_error_accounting_entry *entry; |
533a90fb FD |
323 | struct lttng_ht_node_u64 *node; |
324 | struct lttng_ht_iter iter; | |
325 | uint64_t key = app->uid; | |
326 | ||
a5a21280 | 327 | lttng_ht_lookup(uid_ht, &key, &iter); |
00d7d903 | 328 | node = lttng_ht_iter_get_node<lttng_ht_node_u64>(&iter); |
cd9adb8b JG |
329 | if (node == nullptr) { |
330 | entry = nullptr; | |
533a90fb | 331 | } else { |
a5a21280 FD |
332 | bool got_ref; |
333 | ||
3fdd08e6 | 334 | entry = lttng::utils::container_of(node, &ust_error_accounting_entry::node); |
a5a21280 FD |
335 | |
336 | got_ref = ust_error_accounting_entry_get(entry); | |
337 | if (!got_ref) { | |
cd9adb8b | 338 | entry = nullptr; |
a5a21280 | 339 | } |
533a90fb FD |
340 | } |
341 | ||
342 | return entry; | |
343 | } | |
344 | ||
a5a21280 FD |
345 | /* |
346 | * Create the entry for this app's UID, the caller acquires a reference to the | |
347 | * entry, | |
348 | */ | |
28ab034a JG |
349 | static struct ust_error_accounting_entry * |
350 | ust_error_accounting_entry_create(const struct ust_app *app) | |
533a90fb | 351 | { |
cd9adb8b | 352 | int i, ret, *cpu_counter_fds = nullptr; |
b623cb6a | 353 | struct lttng_ust_ctl_daemon_counter *daemon_counter; |
533a90fb | 354 | struct lttng_ust_abi_object_data *counter, **cpu_counters; |
cd9adb8b | 355 | struct ust_error_accounting_entry *entry = nullptr; |
5728ab7d | 356 | lttng_ust_ctl_counter_dimension dimension = {}; |
7966af57 SM |
357 | |
358 | dimension.size = ust_state.number_indices; | |
359 | dimension.has_underflow = false; | |
360 | dimension.has_overflow = false; | |
533a90fb | 361 | |
783db316 MD |
362 | if (!ust_app_supports_counters(app)) { |
363 | DBG("Refusing to create accounting entry for application (unsupported feature): app name = '%s', app ppid = %d", | |
28ab034a JG |
364 | app->name, |
365 | (int) app->ppid); | |
783db316 MD |
366 | goto error; |
367 | } | |
368 | ||
64803277 | 369 | entry = zmalloc<ust_error_accounting_entry>(); |
533a90fb FD |
370 | if (!entry) { |
371 | PERROR("Failed to allocate event notifier error acounting entry") | |
372 | goto error; | |
373 | } | |
374 | ||
a5a21280 | 375 | urcu_ref_init(&entry->ref); |
761ffce2 | 376 | entry->uid = app->uid; |
b623cb6a | 377 | entry->nr_counter_cpu_fds = lttng_ust_ctl_get_nr_cpu_per_counter(); |
761ffce2 | 378 | |
64803277 | 379 | cpu_counter_fds = calloc<int>(entry->nr_counter_cpu_fds); |
533a90fb FD |
380 | if (!cpu_counter_fds) { |
381 | PERROR("Failed to allocate event notifier error counter file descriptors array: application uid = %d, application name = '%s', pid = %d, allocation size = %zu", | |
28ab034a JG |
382 | (int) app->uid, |
383 | app->name, | |
384 | (int) app->pid, | |
385 | entry->nr_counter_cpu_fds * sizeof(*cpu_counter_fds)); | |
533a90fb FD |
386 | goto error_counter_cpu_fds_alloc; |
387 | } | |
388 | ||
389 | /* Initialize to an invalid fd value to closes fds in case of error. */ | |
390 | for (i = 0; i < entry->nr_counter_cpu_fds; i++) { | |
391 | cpu_counter_fds[i] = -1; | |
392 | } | |
393 | ||
64803277 | 394 | cpu_counters = calloc<lttng_ust_abi_object_data *>(entry->nr_counter_cpu_fds); |
533a90fb FD |
395 | if (!cpu_counters) { |
396 | 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 |
397 | (int) app->uid, |
398 | app->name, | |
399 | (int) app->pid, | |
400 | entry->nr_counter_cpu_fds * sizeof(struct lttng_ust_abi_object_data *)); | |
533a90fb FD |
401 | goto error_counter_cpus_alloc; |
402 | } | |
403 | ||
404 | for (i = 0; i < entry->nr_counter_cpu_fds; i++) { | |
405 | cpu_counter_fds[i] = shm_create_anonymous("event-notifier-error-accounting"); | |
406 | if (cpu_counter_fds[i] == -1) { | |
407 | ERR("Failed to create event notifier error accounting shared memory for application user: application uid = %d, pid = %d, application name = '%s'", | |
28ab034a JG |
408 | (int) app->uid, |
409 | (int) app->pid, | |
410 | app->name); | |
533a90fb FD |
411 | goto error_shm_alloc; |
412 | } | |
413 | } | |
414 | ||
415 | /* | |
416 | * Ownership of the file descriptors transferred to the ustctl object. | |
417 | */ | |
28ab034a JG |
418 | daemon_counter = lttng_ust_ctl_create_counter(1, |
419 | &dimension, | |
420 | 0, | |
421 | -1, | |
422 | entry->nr_counter_cpu_fds, | |
423 | cpu_counter_fds, | |
424 | LTTNG_UST_CTL_COUNTER_BITNESS_32, | |
425 | LTTNG_UST_CTL_COUNTER_ARITHMETIC_MODULAR, | |
426 | LTTNG_UST_CTL_COUNTER_ALLOC_PER_CPU, | |
427 | false); | |
533a90fb FD |
428 | if (!daemon_counter) { |
429 | goto error_create_daemon_counter; | |
430 | } | |
431 | ||
b623cb6a | 432 | ret = lttng_ust_ctl_create_counter_data(daemon_counter, &counter); |
533a90fb FD |
433 | if (ret) { |
434 | ERR("Failed to create userspace tracer counter data for application user: uid = %d, pid = %d, application name = '%s'", | |
28ab034a JG |
435 | (int) app->uid, |
436 | (int) app->pid, | |
437 | app->name); | |
533a90fb FD |
438 | goto error_create_counter_data; |
439 | } | |
440 | ||
441 | for (i = 0; i < entry->nr_counter_cpu_fds; i++) { | |
28ab034a | 442 | ret = lttng_ust_ctl_create_counter_cpu_data(daemon_counter, i, &cpu_counters[i]); |
533a90fb FD |
443 | if (ret) { |
444 | ERR("Failed to create userspace tracer counter cpu data for application user: uid = %d, pid = %d, application name = '%s'", | |
28ab034a JG |
445 | (int) app->uid, |
446 | (int) app->pid, | |
447 | app->name); | |
533a90fb FD |
448 | goto error_create_counter_cpu_data; |
449 | } | |
450 | } | |
451 | ||
452 | entry->daemon_counter = daemon_counter; | |
453 | entry->counter = counter; | |
454 | entry->cpu_counters = cpu_counters; | |
455 | ||
a5a21280 | 456 | lttng_ht_node_init_u64(&entry->node, entry->uid); |
533a90fb FD |
457 | lttng_ht_add_unique_u64(error_counter_uid_ht, &entry->node); |
458 | ||
459 | goto end; | |
460 | ||
461 | error_create_counter_cpu_data: | |
462 | /* Teardown any allocated cpu counters. */ | |
463 | for (i = 0; i < entry->nr_counter_cpu_fds; i++) { | |
464 | if (!cpu_counters[i]) { | |
465 | /* | |
466 | * Early-exit when error occurred before all cpu | |
467 | * counters could be initialized. | |
468 | */ | |
469 | break; | |
470 | } | |
471 | ||
b623cb6a | 472 | lttng_ust_ctl_release_object(-1, cpu_counters[i]); |
533a90fb FD |
473 | free(cpu_counters[i]); |
474 | } | |
475 | ||
b623cb6a | 476 | lttng_ust_ctl_release_object(-1, entry->counter); |
533a90fb FD |
477 | free(entry->counter); |
478 | error_create_counter_data: | |
b623cb6a | 479 | lttng_ust_ctl_destroy_counter(daemon_counter); |
533a90fb FD |
480 | error_create_daemon_counter: |
481 | error_shm_alloc: | |
8f0646a0 | 482 | /* Error occurred before per-cpu SHMs were handed-off to ustctl. */ |
533a90fb FD |
483 | if (cpu_counter_fds) { |
484 | for (i = 0; i < entry->nr_counter_cpu_fds; i++) { | |
485 | if (cpu_counter_fds[i] < 0) { | |
486 | /* | |
487 | * Early-exit when error occurred before all cpu | |
488 | * counter shm fds could be initialized. | |
489 | */ | |
490 | break; | |
491 | } | |
492 | ||
493 | ret = close(cpu_counter_fds[i]); | |
494 | if (ret) { | |
a5a21280 | 495 | PERROR("Failed to close error counter per-CPU shm file descriptor: fd = %d", |
28ab034a | 496 | cpu_counter_fds[i]); |
533a90fb FD |
497 | } |
498 | } | |
499 | } | |
500 | ||
501 | free(cpu_counters); | |
502 | error_counter_cpus_alloc: | |
503 | error_counter_cpu_fds_alloc: | |
504 | free(entry); | |
505 | error: | |
cd9adb8b | 506 | entry = nullptr; |
533a90fb FD |
507 | end: |
508 | free(cpu_counter_fds); | |
509 | return entry; | |
510 | } | |
511 | ||
28ab034a JG |
512 | static enum event_notifier_error_accounting_status |
513 | send_counter_data_to_ust(struct ust_app *app, struct lttng_ust_abi_object_data *new_counter) | |
533a90fb FD |
514 | { |
515 | int ret; | |
516 | enum event_notifier_error_accounting_status status; | |
517 | ||
518 | /* Attach counter to trigger group. */ | |
519 | pthread_mutex_lock(&app->sock_lock); | |
28ab034a JG |
520 | ret = lttng_ust_ctl_send_counter_data_to_ust( |
521 | app->sock, app->event_notifier_group.object->handle, new_counter); | |
533a90fb FD |
522 | pthread_mutex_unlock(&app->sock_lock); |
523 | if (ret < 0) { | |
524 | if (ret != -EPIPE && ret != -LTTNG_UST_ERR_EXITING) { | |
525 | ERR("Failed to send counter data to application: application name = '%s', pid = %d, ret = %d", | |
28ab034a JG |
526 | app->name, |
527 | app->pid, | |
528 | ret); | |
533a90fb FD |
529 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; |
530 | } else { | |
531 | DBG3("Failed to send counter data to application (application is dead): application name = '%s', pid = %d, ret = %d", | |
28ab034a JG |
532 | app->name, |
533 | app->pid, | |
534 | ret); | |
533a90fb FD |
535 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_APP_DEAD; |
536 | } | |
537 | ||
538 | goto end; | |
539 | } | |
540 | ||
541 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; | |
542 | end: | |
543 | return status; | |
544 | } | |
545 | ||
28ab034a JG |
546 | static enum event_notifier_error_accounting_status |
547 | send_counter_cpu_data_to_ust(struct ust_app *app, | |
548 | struct lttng_ust_abi_object_data *counter, | |
549 | struct lttng_ust_abi_object_data *counter_cpu) | |
533a90fb FD |
550 | { |
551 | int ret; | |
552 | enum event_notifier_error_accounting_status status; | |
553 | ||
554 | pthread_mutex_lock(&app->sock_lock); | |
28ab034a | 555 | ret = lttng_ust_ctl_send_counter_cpu_data_to_ust(app->sock, counter, counter_cpu); |
533a90fb FD |
556 | pthread_mutex_unlock(&app->sock_lock); |
557 | if (ret < 0) { | |
558 | if (ret != -EPIPE && ret != -LTTNG_UST_ERR_EXITING) { | |
559 | ERR("Failed to send counter CPU data to application: application name = '%s', pid = %d, ret = %d", | |
28ab034a JG |
560 | app->name, |
561 | app->pid, | |
562 | ret); | |
533a90fb FD |
563 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; |
564 | } else { | |
565 | DBG3("Failed to send counter CPU data to application: application name = '%s', pid = %d, ret = %d", | |
28ab034a JG |
566 | app->name, |
567 | app->pid, | |
568 | ret); | |
533a90fb FD |
569 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_APP_DEAD; |
570 | } | |
571 | ||
572 | goto end; | |
573 | } | |
574 | ||
575 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; | |
576 | end: | |
577 | return status; | |
578 | } | |
579 | ||
580 | enum event_notifier_error_accounting_status | |
581 | event_notifier_error_accounting_register_app(struct ust_app *app) | |
582 | { | |
583 | int ret; | |
584 | uint64_t i; | |
585 | struct lttng_ust_abi_object_data *new_counter; | |
761ffce2 | 586 | struct ust_error_accounting_entry *entry; |
533a90fb FD |
587 | enum event_notifier_error_accounting_status status; |
588 | struct lttng_ust_abi_object_data **cpu_counters; | |
07c4863f | 589 | const lttng::urcu::read_lock_guard read_lock; |
533a90fb | 590 | |
783db316 MD |
591 | if (!ust_app_supports_counters(app)) { |
592 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_UNSUPPORTED; | |
593 | goto end; | |
594 | } | |
595 | ||
533a90fb FD |
596 | /* |
597 | * Check if we already have a error counter for the user id of this | |
598 | * app. If not, create one. | |
599 | */ | |
a5a21280 | 600 | entry = ust_error_accounting_entry_find(error_counter_uid_ht, app); |
cd9adb8b | 601 | if (entry == nullptr) { |
a5a21280 FD |
602 | /* |
603 | * Take the event notifier counter lock before creating the new | |
604 | * entry to ensure that no event notifier is registered between | |
605 | * the the entry creation and event notifier count check. | |
606 | */ | |
607 | pthread_mutex_lock(&the_event_notifier_counter.lock); | |
608 | ||
f46376a1 | 609 | entry = ust_error_accounting_entry_create(app); |
533a90fb FD |
610 | if (!entry) { |
611 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; | |
a5a21280 FD |
612 | pthread_mutex_unlock(&the_event_notifier_counter.lock); |
613 | goto error_creating_entry; | |
614 | } | |
615 | ||
616 | /* | |
617 | * We just created a new UID entry, If there are event | |
618 | * notifiers already registered, take one reference on their | |
619 | * behalf. | |
620 | */ | |
621 | if (the_event_notifier_counter.count > 0) { | |
622 | ust_error_accounting_entry_get(entry); | |
533a90fb | 623 | } |
a5a21280 FD |
624 | |
625 | pthread_mutex_unlock(&the_event_notifier_counter.lock); | |
533a90fb FD |
626 | } |
627 | ||
628 | /* Duplicate counter object data. */ | |
28ab034a | 629 | ret = lttng_ust_ctl_duplicate_ust_object_data(&new_counter, entry->counter); |
533a90fb FD |
630 | if (ret) { |
631 | ERR("Failed to duplicate event notifier error accounting counter for application user: application uid = %d, pid = %d, application name = '%s'", | |
28ab034a JG |
632 | (int) app->uid, |
633 | (int) app->pid, | |
634 | app->name); | |
533a90fb | 635 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; |
a5a21280 | 636 | goto error_duplicate_counter; |
533a90fb FD |
637 | } |
638 | ||
639 | status = send_counter_data_to_ust(app, new_counter); | |
640 | if (status != EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK) { | |
cd9c532c FD |
641 | if (status == EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_APP_DEAD) { |
642 | goto error_send_counter_data; | |
643 | } | |
644 | ||
533a90fb | 645 | ERR("Failed to send counter data to application tracer: status = %s, application uid = %d, pid = %d, application name = '%s'", |
28ab034a JG |
646 | error_accounting_status_str(status), |
647 | (int) app->uid, | |
648 | (int) app->pid, | |
649 | app->name); | |
533a90fb FD |
650 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; |
651 | goto error_send_counter_data; | |
652 | } | |
653 | ||
64803277 | 654 | cpu_counters = calloc<lttng_ust_abi_object_data *>(entry->nr_counter_cpu_fds); |
533a90fb FD |
655 | if (!cpu_counters) { |
656 | 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 |
657 | (int) app->uid, |
658 | app->name, | |
659 | (int) app->pid, | |
660 | entry->nr_counter_cpu_fds * sizeof(**cpu_counters)); | |
533a90fb FD |
661 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NOMEM; |
662 | goto error_allocate_cpu_counters; | |
663 | } | |
664 | ||
665 | for (i = 0; i < entry->nr_counter_cpu_fds; i++) { | |
cd9adb8b | 666 | struct lttng_ust_abi_object_data *new_counter_cpu = nullptr; |
533a90fb | 667 | |
b623cb6a | 668 | ret = lttng_ust_ctl_duplicate_ust_object_data(&new_counter_cpu, |
28ab034a | 669 | entry->cpu_counters[i]); |
533a90fb FD |
670 | if (ret) { |
671 | ERR("Failed to duplicate userspace tracer counter cpu data for application user: uid = %d, pid = %d, application name = '%s'", | |
28ab034a JG |
672 | (int) app->uid, |
673 | (int) app->pid, | |
674 | app->name); | |
533a90fb FD |
675 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NOMEM; |
676 | goto error_duplicate_cpu_counter; | |
677 | } | |
678 | ||
679 | cpu_counters[i] = new_counter_cpu; | |
680 | ||
28ab034a | 681 | status = send_counter_cpu_data_to_ust(app, new_counter, new_counter_cpu); |
533a90fb | 682 | if (status != EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK) { |
cd9c532c FD |
683 | if (status == EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_APP_DEAD) { |
684 | goto error_send_cpu_counter_data; | |
685 | } | |
686 | ||
533a90fb | 687 | ERR("Failed to send counter cpu data to application tracer: status = %s, application uid = %d, pid = %d, application name = '%s'", |
28ab034a JG |
688 | error_accounting_status_str(status), |
689 | (int) app->uid, | |
690 | (int) app->pid, | |
691 | app->name); | |
533a90fb FD |
692 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; |
693 | goto error_send_cpu_counter_data; | |
694 | } | |
695 | } | |
696 | ||
697 | app->event_notifier_group.counter = new_counter; | |
cd9adb8b | 698 | new_counter = nullptr; |
533a90fb FD |
699 | app->event_notifier_group.nr_counter_cpu = entry->nr_counter_cpu_fds; |
700 | app->event_notifier_group.counter_cpu = cpu_counters; | |
cd9adb8b | 701 | cpu_counters = nullptr; |
56047f5a | 702 | goto end; |
533a90fb | 703 | |
533a90fb FD |
704 | error_send_cpu_counter_data: |
705 | error_duplicate_cpu_counter: | |
706 | /* Teardown any duplicated cpu counters. */ | |
707 | for (i = 0; i < entry->nr_counter_cpu_fds; i++) { | |
708 | if (!cpu_counters[i]) { | |
709 | /* | |
710 | * Early-exit when error occurred before all cpu | |
711 | * counters could be initialized. | |
712 | */ | |
713 | break; | |
714 | } | |
715 | ||
b623cb6a | 716 | lttng_ust_ctl_release_object(-1, cpu_counters[i]); |
533a90fb FD |
717 | free(cpu_counters[i]); |
718 | } | |
719 | ||
a55f8ad1 JG |
720 | free(cpu_counters); |
721 | ||
5d650dcd | 722 | error_allocate_cpu_counters: |
533a90fb | 723 | error_send_counter_data: |
b623cb6a | 724 | lttng_ust_ctl_release_object(-1, new_counter); |
533a90fb | 725 | free(new_counter); |
a5a21280 FD |
726 | error_duplicate_counter: |
727 | ust_error_accounting_entry_put(entry); | |
728 | error_creating_entry: | |
cd9adb8b | 729 | app->event_notifier_group.counter = nullptr; |
783db316 | 730 | end: |
533a90fb FD |
731 | return status; |
732 | } | |
733 | ||
734 | enum event_notifier_error_accounting_status | |
735 | event_notifier_error_accounting_unregister_app(struct ust_app *app) | |
736 | { | |
737 | enum event_notifier_error_accounting_status status; | |
761ffce2 | 738 | struct ust_error_accounting_entry *entry; |
533a90fb FD |
739 | int i; |
740 | ||
07c4863f | 741 | const lttng::urcu::read_lock_guard read_lock; |
a5a21280 FD |
742 | |
743 | /* If an error occurred during app registration no entry was created. */ | |
744 | if (!app->event_notifier_group.counter) { | |
745 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; | |
746 | goto end; | |
747 | } | |
748 | ||
749 | entry = ust_error_accounting_entry_find(error_counter_uid_ht, app); | |
cd9adb8b | 750 | if (entry == nullptr) { |
533a90fb | 751 | ERR("Failed to find event notitifier error accounting entry on application teardown: pid = %d, application name = '%s'", |
28ab034a JG |
752 | app->pid, |
753 | app->name); | |
533a90fb FD |
754 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; |
755 | goto end; | |
a5a21280 FD |
756 | } else { |
757 | /* | |
758 | * Put the entry twice as we acquired a reference from the | |
759 | * `ust_error_accounting_entry_find()` above. | |
760 | */ | |
761 | ust_error_accounting_entry_put(entry); | |
762 | ust_error_accounting_entry_put(entry); | |
533a90fb FD |
763 | } |
764 | ||
765 | for (i = 0; i < app->event_notifier_group.nr_counter_cpu; i++) { | |
28ab034a | 766 | lttng_ust_ctl_release_object(app->sock, app->event_notifier_group.counter_cpu[i]); |
533a90fb FD |
767 | free(app->event_notifier_group.counter_cpu[i]); |
768 | } | |
769 | ||
770 | free(app->event_notifier_group.counter_cpu); | |
771 | ||
b623cb6a | 772 | lttng_ust_ctl_release_object(app->sock, app->event_notifier_group.counter); |
533a90fb FD |
773 | free(app->event_notifier_group.counter); |
774 | ||
775 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; | |
776 | end: | |
533a90fb FD |
777 | return status; |
778 | } | |
779 | ||
28ab034a JG |
780 | static enum event_notifier_error_accounting_status |
781 | event_notifier_error_accounting_ust_get_count(const struct lttng_trigger *trigger, uint64_t *count) | |
533a90fb | 782 | { |
533a90fb FD |
783 | uint64_t error_counter_index, global_sum = 0; |
784 | enum event_notifier_error_accounting_status status; | |
785 | size_t dimension_indexes[1]; | |
786 | const uint64_t tracer_token = lttng_trigger_get_tracer_token(trigger); | |
761ffce2 FD |
787 | uid_t trigger_owner_uid; |
788 | const char *trigger_name; | |
533a90fb | 789 | |
07c4863f | 790 | const lttng::urcu::read_lock_guard read_lock; |
533a90fb | 791 | |
761ffce2 FD |
792 | get_trigger_info_for_log(trigger, &trigger_name, &trigger_owner_uid); |
793 | ||
28ab034a | 794 | status = get_error_counter_index_for_token(&ust_state, tracer_token, &error_counter_index); |
533a90fb | 795 | if (status != EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK) { |
28ab034a JG |
796 | ERR("Failed to retrieve index for tracer token: token = %" PRIu64 |
797 | ", trigger name = '%s', trigger owner uid = %d, status = %s", | |
798 | tracer_token, | |
799 | trigger_name, | |
800 | (int) trigger_owner_uid, | |
801 | error_accounting_status_str(status)); | |
533a90fb FD |
802 | goto end; |
803 | } | |
804 | ||
805 | dimension_indexes[0] = error_counter_index; | |
806 | ||
761ffce2 FD |
807 | /* |
808 | * Iterate over all the UID entries. | |
809 | * We aggregate the value of all uid entries regardless of if the uid | |
810 | * matches the trigger's uid because a user that is allowed to register | |
811 | * a trigger to a given sessiond is also allowed to create an event | |
812 | * notifier on all apps that this sessiond is aware of. | |
813 | */ | |
cad5fc86 JG |
814 | for (auto *uid_entry : |
815 | lttng::urcu::lfht_iteration_adapter<ust_error_accounting_entry, | |
816 | decltype(ust_error_accounting_entry::node), | |
817 | &ust_error_accounting_entry::node>( | |
818 | *error_counter_uid_ht->ht)) { | |
533a90fb FD |
819 | int ret; |
820 | int64_t local_value = 0; | |
821 | bool overflow = false, underflow = false; | |
822 | ||
b623cb6a | 823 | ret = lttng_ust_ctl_counter_aggregate(uid_entry->daemon_counter, |
28ab034a JG |
824 | dimension_indexes, |
825 | &local_value, | |
826 | &overflow, | |
827 | &underflow); | |
533a90fb | 828 | if (ret || local_value < 0) { |
533a90fb FD |
829 | if (ret) { |
830 | ERR("Failed to aggregate event notifier error counter values of trigger: trigger name = '%s', trigger owner uid = %d", | |
28ab034a JG |
831 | trigger_name, |
832 | (int) trigger_owner_uid); | |
533a90fb FD |
833 | } else if (local_value < 0) { |
834 | ERR("Negative event notifier error counter value encountered during aggregation: trigger name = '%s', trigger owner uid = %d, value = %" PRId64, | |
28ab034a JG |
835 | trigger_name, |
836 | (int) trigger_owner_uid, | |
837 | local_value); | |
533a90fb FD |
838 | } else { |
839 | abort(); | |
840 | } | |
841 | ||
842 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; | |
843 | goto end; | |
844 | } | |
845 | ||
846 | /* Cast is safe as negative values are checked-for above. */ | |
847 | global_sum += (uint64_t) local_value; | |
533a90fb FD |
848 | } |
849 | ||
850 | *count = global_sum; | |
851 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; | |
852 | ||
853 | end: | |
533a90fb FD |
854 | return status; |
855 | } | |
856 | ||
28ab034a JG |
857 | static enum event_notifier_error_accounting_status |
858 | event_notifier_error_accounting_ust_clear(const struct lttng_trigger *trigger) | |
533a90fb | 859 | { |
533a90fb FD |
860 | uint64_t error_counter_index; |
861 | enum event_notifier_error_accounting_status status; | |
862 | size_t dimension_index; | |
863 | const uint64_t tracer_token = lttng_trigger_get_tracer_token(trigger); | |
864 | ||
07c4863f | 865 | const lttng::urcu::read_lock_guard read_lock; |
56047f5a | 866 | |
28ab034a | 867 | status = get_error_counter_index_for_token(&ust_state, tracer_token, &error_counter_index); |
533a90fb FD |
868 | if (status != EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK) { |
869 | uid_t trigger_owner_uid; | |
870 | const char *trigger_name; | |
871 | ||
28ab034a | 872 | get_trigger_info_for_log(trigger, &trigger_name, &trigger_owner_uid); |
533a90fb | 873 | |
28ab034a JG |
874 | ERR("Failed to retrieve index for tracer token: token = %" PRIu64 |
875 | ", trigger name = '%s', trigger owner uid = %d, status = %s", | |
876 | tracer_token, | |
877 | trigger_name, | |
878 | (int) trigger_owner_uid, | |
879 | error_accounting_status_str(status)); | |
533a90fb FD |
880 | goto end; |
881 | } | |
882 | ||
883 | dimension_index = error_counter_index; | |
884 | ||
a5a21280 FD |
885 | /* |
886 | * Go over all error counters (ignoring uid) as a trigger (and trigger | |
887 | * errors) can be generated from any applications that this session | |
888 | * daemon is managing. | |
889 | */ | |
cad5fc86 JG |
890 | for (auto *uid_entry : |
891 | lttng::urcu::lfht_iteration_adapter<ust_error_accounting_entry, | |
892 | decltype(ust_error_accounting_entry::node), | |
893 | &ust_error_accounting_entry::node>( | |
894 | *error_counter_uid_ht->ht)) { | |
28ab034a JG |
895 | const int ret = |
896 | lttng_ust_ctl_counter_clear(uid_entry->daemon_counter, &dimension_index); | |
533a90fb FD |
897 | |
898 | if (ret) { | |
899 | uid_t trigger_owner_uid; | |
900 | const char *trigger_name; | |
901 | ||
28ab034a | 902 | get_trigger_info_for_log(trigger, &trigger_name, &trigger_owner_uid); |
533a90fb | 903 | ERR("Failed to clear event notifier counter value for trigger: counter uid = %d, trigger name = '%s', trigger owner uid = %d", |
28ab034a JG |
904 | (int) uid_entry->node.key, |
905 | trigger_name, | |
906 | (int) trigger_owner_uid); | |
533a90fb FD |
907 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; |
908 | goto end; | |
909 | } | |
910 | } | |
911 | ||
912 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; | |
913 | end: | |
533a90fb FD |
914 | return status; |
915 | } | |
916 | #endif /* HAVE_LIBLTTNG_UST_CTL */ | |
917 | ||
28ab034a JG |
918 | static enum event_notifier_error_accounting_status |
919 | event_notifier_error_accounting_kernel_clear(const struct lttng_trigger *trigger) | |
90aa04a1 FD |
920 | { |
921 | int ret; | |
922 | uint64_t error_counter_index; | |
923 | enum event_notifier_error_accounting_status status; | |
b8e2fb80 | 924 | struct lttng_kernel_abi_counter_clear counter_clear = {}; |
90aa04a1 | 925 | |
28ab034a JG |
926 | status = get_error_counter_index_for_token( |
927 | &kernel_state, lttng_trigger_get_tracer_token(trigger), &error_counter_index); | |
90aa04a1 FD |
928 | if (status != EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK) { |
929 | uid_t trigger_owner_uid; | |
930 | const char *trigger_name; | |
90aa04a1 | 931 | |
28ab034a | 932 | get_trigger_info_for_log(trigger, &trigger_name, &trigger_owner_uid); |
533a90fb FD |
933 | |
934 | ERR("Failed to get event notifier error counter index: trigger owner uid = %d, trigger name = '%s', status = '%s'", | |
28ab034a JG |
935 | trigger_owner_uid, |
936 | trigger_name, | |
937 | error_accounting_status_str(status)); | |
90aa04a1 FD |
938 | goto end; |
939 | } | |
940 | ||
941 | counter_clear.index.number_dimensions = 1; | |
942 | counter_clear.index.dimension_indexes[0] = error_counter_index; | |
943 | ||
28ab034a | 944 | ret = kernctl_counter_clear(kernel_error_accounting_entry.error_counter_fd, &counter_clear); |
90aa04a1 | 945 | if (ret) { |
533a90fb FD |
946 | uid_t trigger_owner_uid; |
947 | const char *trigger_name; | |
948 | ||
28ab034a | 949 | get_trigger_info_for_log(trigger, &trigger_name, &trigger_owner_uid); |
533a90fb FD |
950 | |
951 | ERR("Failed to clear kernel event notifier error counter: trigger owner uid = %d, trigger name = '%s'", | |
28ab034a JG |
952 | trigger_owner_uid, |
953 | trigger_name); | |
90aa04a1 FD |
954 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; |
955 | goto end; | |
956 | } | |
957 | ||
958 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; | |
959 | end: | |
960 | return status; | |
961 | } | |
962 | ||
963 | enum event_notifier_error_accounting_status | |
28ab034a | 964 | event_notifier_error_accounting_register_kernel(int kernel_event_notifier_group_fd) |
90aa04a1 FD |
965 | { |
966 | int error_counter_fd = -1, ret; | |
967 | enum event_notifier_error_accounting_status status; | |
7966af57 | 968 | lttng_kernel_abi_counter_conf error_counter_conf = { |
b8e2fb80 | 969 | .arithmetic = LTTNG_KERNEL_ABI_COUNTER_ARITHMETIC_MODULAR, |
90aa04a1 | 970 | .bitness = sizeof(void *) == sizeof(uint32_t) ? |
28ab034a JG |
971 | LTTNG_KERNEL_ABI_COUNTER_BITNESS_32 : |
972 | LTTNG_KERNEL_ABI_COUNTER_BITNESS_64, | |
90aa04a1 | 973 | .number_dimensions = 1, |
7966af57 | 974 | .global_sum_step = 0, |
1c9a0b0e MJ |
975 | .dimensions = {}, |
976 | .coalesce_hits = 0, | |
977 | .padding = {}, | |
90aa04a1 | 978 | }; |
7966af57 SM |
979 | error_counter_conf.dimensions[0].size = kernel_state.number_indices; |
980 | error_counter_conf.dimensions[0].has_underflow = false; | |
981 | error_counter_conf.dimensions[0].has_overflow = false; | |
90aa04a1 | 982 | |
28ab034a JG |
983 | ret = kernctl_create_event_notifier_group_error_counter(kernel_event_notifier_group_fd, |
984 | &error_counter_conf); | |
90aa04a1 FD |
985 | if (ret < 0) { |
986 | PERROR("Failed to create event notifier group error counter through kernel ioctl: kernel_event_notifier_group_fd = %d", | |
28ab034a | 987 | kernel_event_notifier_group_fd); |
90aa04a1 FD |
988 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; |
989 | goto error; | |
990 | } | |
991 | ||
992 | error_counter_fd = ret; | |
993 | ||
994 | /* Prevent fd duplication after execlp(). */ | |
995 | ret = fcntl(error_counter_fd, F_SETFD, FD_CLOEXEC); | |
996 | if (ret < 0) { | |
997 | PERROR("Failed to set FD_CLOEXEC flag on event notifier error counter file descriptor: error_counter_fd = %d", | |
28ab034a | 998 | error_counter_fd); |
90aa04a1 FD |
999 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; |
1000 | goto error; | |
1001 | } | |
1002 | ||
28ab034a | 1003 | DBG("Created kernel event notifier group error counter: fd = %d", error_counter_fd); |
90aa04a1 | 1004 | |
28ab034a | 1005 | kernel_error_accounting_entry.error_counter_fd = error_counter_fd; |
90aa04a1 FD |
1006 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; |
1007 | ||
1008 | error: | |
1009 | return status; | |
1010 | } | |
1011 | ||
28ab034a JG |
1012 | static enum event_notifier_error_accounting_status create_error_counter_index_for_token( |
1013 | struct error_accounting_state *state, uint64_t tracer_token, uint64_t *error_counter_index) | |
90aa04a1 FD |
1014 | { |
1015 | struct index_ht_entry *index_entry; | |
1016 | enum lttng_index_allocator_status index_alloc_status; | |
1017 | uint64_t local_error_counter_index; | |
1018 | enum event_notifier_error_accounting_status status; | |
1019 | ||
a0377dfe | 1020 | LTTNG_ASSERT(state); |
761ffce2 | 1021 | |
90aa04a1 | 1022 | /* Allocate a new index for that counter. */ |
28ab034a JG |
1023 | index_alloc_status = |
1024 | lttng_index_allocator_alloc(state->index_allocator, &local_error_counter_index); | |
90aa04a1 FD |
1025 | switch (index_alloc_status) { |
1026 | case LTTNG_INDEX_ALLOCATOR_STATUS_EMPTY: | |
1027 | DBG("No indices left in the configured event notifier error counter: " | |
28ab034a JG |
1028 | "number-of-indices = %" PRIu64, |
1029 | lttng_index_allocator_get_index_count(state->index_allocator)); | |
90aa04a1 FD |
1030 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NO_INDEX_AVAILABLE; |
1031 | goto end; | |
1032 | case LTTNG_INDEX_ALLOCATOR_STATUS_OK: | |
1033 | break; | |
1034 | default: | |
1035 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; | |
1036 | goto end; | |
1037 | } | |
1038 | ||
64803277 | 1039 | index_entry = zmalloc<index_ht_entry>(); |
cd9adb8b | 1040 | if (index_entry == nullptr) { |
90aa04a1 FD |
1041 | PERROR("Failed to allocate event notifier error counter hash table entry"); |
1042 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NOMEM; | |
1043 | goto end; | |
1044 | } | |
1045 | ||
1046 | index_entry->error_counter_index = local_error_counter_index; | |
1047 | lttng_ht_node_init_u64(&index_entry->node, tracer_token); | |
761ffce2 | 1048 | lttng_ht_add_unique_u64(state->indices_ht, &index_entry->node); |
90aa04a1 | 1049 | |
28ab034a JG |
1050 | DBG("Allocated error counter index for tracer token: tracer token = %" PRIu64 |
1051 | ", index = %" PRIu64, | |
1052 | tracer_token, | |
1053 | local_error_counter_index); | |
90aa04a1 FD |
1054 | *error_counter_index = local_error_counter_index; |
1055 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; | |
1056 | end: | |
1057 | return status; | |
1058 | } | |
1059 | ||
1060 | enum event_notifier_error_accounting_status | |
28ab034a JG |
1061 | event_notifier_error_accounting_register_event_notifier(const struct lttng_trigger *trigger, |
1062 | uint64_t *error_counter_index) | |
90aa04a1 FD |
1063 | { |
1064 | enum event_notifier_error_accounting_status status; | |
1065 | uint64_t local_error_counter_index; | |
761ffce2 FD |
1066 | struct error_accounting_state *state; |
1067 | ||
1068 | switch (lttng_trigger_get_underlying_domain_type_restriction(trigger)) { | |
1069 | case LTTNG_DOMAIN_KERNEL: | |
1070 | state = &kernel_state; | |
1071 | break; | |
1072 | case LTTNG_DOMAIN_UST: | |
496fc78f FD |
1073 | case LTTNG_DOMAIN_PYTHON: |
1074 | case LTTNG_DOMAIN_JUL: | |
1075 | case LTTNG_DOMAIN_LOG4J: | |
47abf22b | 1076 | case LTTNG_DOMAIN_LOG4J2: |
761ffce2 FD |
1077 | state = &ust_state; |
1078 | break; | |
1079 | default: | |
1080 | abort(); | |
1081 | } | |
90aa04a1 FD |
1082 | |
1083 | /* | |
1084 | * Check if this event notifier already has a error counter index | |
1085 | * assigned. | |
1086 | */ | |
28ab034a JG |
1087 | status = get_error_counter_index_for_token( |
1088 | state, lttng_trigger_get_tracer_token(trigger), &local_error_counter_index); | |
90aa04a1 FD |
1089 | switch (status) { |
1090 | case EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NOT_FOUND: | |
1091 | { | |
1092 | uid_t trigger_owner_uid; | |
1093 | const char *trigger_name; | |
90aa04a1 | 1094 | |
28ab034a | 1095 | get_trigger_info_for_log(trigger, &trigger_name, &trigger_owner_uid); |
533a90fb FD |
1096 | |
1097 | 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 |
1098 | trigger_name, |
1099 | trigger_owner_uid, | |
1100 | lttng_trigger_get_tracer_token(trigger)); | |
533a90fb | 1101 | |
28ab034a JG |
1102 | status = create_error_counter_index_for_token( |
1103 | state, lttng_trigger_get_tracer_token(trigger), &local_error_counter_index); | |
90aa04a1 | 1104 | if (status != EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK) { |
533a90fb | 1105 | ERR("Error creating index for token: status = %s, trigger name = '%s', trigger owner uid = %d", |
28ab034a JG |
1106 | error_accounting_status_str(status), |
1107 | trigger_name, | |
1108 | trigger_owner_uid); | |
90aa04a1 FD |
1109 | goto end; |
1110 | } | |
90aa04a1 | 1111 | } |
30eb3927 | 1112 | /* fall-through. */ |
90aa04a1 FD |
1113 | case EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK: |
1114 | *error_counter_index = local_error_counter_index; | |
1115 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; | |
1116 | break; | |
1117 | default: | |
1118 | break; | |
1119 | } | |
1120 | ||
a5a21280 FD |
1121 | #ifdef HAVE_LIBLTTNG_UST_CTL |
1122 | switch (lttng_trigger_get_underlying_domain_type_restriction(trigger)) { | |
1123 | case LTTNG_DOMAIN_UST: | |
496fc78f FD |
1124 | case LTTNG_DOMAIN_PYTHON: |
1125 | case LTTNG_DOMAIN_JUL: | |
1126 | case LTTNG_DOMAIN_LOG4J: | |
47abf22b | 1127 | case LTTNG_DOMAIN_LOG4J2: |
a5a21280 FD |
1128 | pthread_mutex_lock(&the_event_notifier_counter.lock); |
1129 | the_event_notifier_counter.count++; | |
1130 | if (the_event_notifier_counter.count == 1) { | |
1131 | /* | |
1132 | * On the first event notifier, we get a reference to | |
1133 | * every existing UID entries. This ensures that the | |
1134 | * entries are kept around if there are still | |
1135 | * registered event notifiers but no apps. | |
1136 | */ | |
1137 | get_ref_all_ust_error_accounting_entry(); | |
1138 | } | |
1139 | pthread_mutex_unlock(&the_event_notifier_counter.lock); | |
1140 | break; | |
1141 | default: | |
1142 | break; | |
1143 | } | |
1144 | #endif /* HAVE_LIBLTTNG_UST_CTL */ | |
1145 | ||
90aa04a1 FD |
1146 | end: |
1147 | return status; | |
1148 | } | |
1149 | ||
28ab034a JG |
1150 | static enum event_notifier_error_accounting_status |
1151 | event_notifier_error_accounting_kernel_get_count(const struct lttng_trigger *trigger, | |
1152 | uint64_t *count) | |
90aa04a1 | 1153 | { |
b8e2fb80 | 1154 | struct lttng_kernel_abi_counter_aggregate counter_aggregate = {}; |
90aa04a1 FD |
1155 | enum event_notifier_error_accounting_status status; |
1156 | uint64_t error_counter_index; | |
1157 | int ret; | |
1158 | ||
28ab034a JG |
1159 | status = get_error_counter_index_for_token( |
1160 | &kernel_state, lttng_trigger_get_tracer_token(trigger), &error_counter_index); | |
90aa04a1 | 1161 | if (status != EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK) { |
533a90fb | 1162 | ERR("Error getting index for token: status=%s", |
28ab034a | 1163 | error_accounting_status_str(status)); |
90aa04a1 FD |
1164 | goto end; |
1165 | } | |
1166 | ||
1167 | counter_aggregate.index.number_dimensions = 1; | |
1168 | counter_aggregate.index.dimension_indexes[0] = error_counter_index; | |
1169 | ||
a0377dfe | 1170 | LTTNG_ASSERT(kernel_error_accounting_entry.error_counter_fd); |
90aa04a1 | 1171 | |
28ab034a JG |
1172 | ret = kernctl_counter_get_aggregate_value(kernel_error_accounting_entry.error_counter_fd, |
1173 | &counter_aggregate); | |
90aa04a1 FD |
1174 | if (ret || counter_aggregate.value.value < 0) { |
1175 | uid_t trigger_owner_uid; | |
1176 | const char *trigger_name; | |
533a90fb | 1177 | |
28ab034a | 1178 | get_trigger_info_for_log(trigger, &trigger_name, &trigger_owner_uid); |
90aa04a1 FD |
1179 | |
1180 | if (counter_aggregate.value.value < 0) { | |
1181 | ERR("Invalid negative event notifier error counter value: trigger owner = %d, trigger name = '%s', value = %" PRId64, | |
28ab034a JG |
1182 | trigger_owner_uid, |
1183 | trigger_name, | |
1184 | counter_aggregate.value.value); | |
90aa04a1 FD |
1185 | } else { |
1186 | ERR("Failed to getting event notifier error count: trigger owner = %d, trigger name = '%s', ret = %d", | |
28ab034a JG |
1187 | trigger_owner_uid, |
1188 | trigger_name, | |
1189 | ret); | |
90aa04a1 FD |
1190 | } |
1191 | ||
1192 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; | |
1193 | goto end; | |
1194 | } | |
1195 | ||
1196 | /* Error count can't be negative. */ | |
a0377dfe | 1197 | LTTNG_ASSERT(counter_aggregate.value.value >= 0); |
90aa04a1 FD |
1198 | *count = (uint64_t) counter_aggregate.value.value; |
1199 | ||
1200 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; | |
1201 | ||
1202 | end: | |
1203 | return status; | |
1204 | } | |
1205 | ||
1206 | enum event_notifier_error_accounting_status | |
28ab034a | 1207 | event_notifier_error_accounting_get_count(const struct lttng_trigger *trigger, uint64_t *count) |
90aa04a1 FD |
1208 | { |
1209 | switch (lttng_trigger_get_underlying_domain_type_restriction(trigger)) { | |
1210 | case LTTNG_DOMAIN_KERNEL: | |
28ab034a | 1211 | return event_notifier_error_accounting_kernel_get_count(trigger, count); |
90aa04a1 | 1212 | case LTTNG_DOMAIN_UST: |
496fc78f FD |
1213 | case LTTNG_DOMAIN_PYTHON: |
1214 | case LTTNG_DOMAIN_JUL: | |
1215 | case LTTNG_DOMAIN_LOG4J: | |
47abf22b | 1216 | case LTTNG_DOMAIN_LOG4J2: |
533a90fb | 1217 | #ifdef HAVE_LIBLTTNG_UST_CTL |
28ab034a | 1218 | return event_notifier_error_accounting_ust_get_count(trigger, count); |
533a90fb | 1219 | #else |
43cee6f9 | 1220 | *count = 0; |
90aa04a1 | 1221 | return EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; |
533a90fb | 1222 | #endif /* HAVE_LIBLTTNG_UST_CTL */ |
90aa04a1 FD |
1223 | default: |
1224 | abort(); | |
1225 | } | |
1226 | } | |
1227 | ||
28ab034a | 1228 | static enum event_notifier_error_accounting_status |
90aa04a1 FD |
1229 | event_notifier_error_accounting_clear(const struct lttng_trigger *trigger) |
1230 | { | |
1231 | switch (lttng_trigger_get_underlying_domain_type_restriction(trigger)) { | |
1232 | case LTTNG_DOMAIN_KERNEL: | |
1233 | return event_notifier_error_accounting_kernel_clear(trigger); | |
1234 | case LTTNG_DOMAIN_UST: | |
496fc78f FD |
1235 | case LTTNG_DOMAIN_PYTHON: |
1236 | case LTTNG_DOMAIN_JUL: | |
1237 | case LTTNG_DOMAIN_LOG4J: | |
47abf22b | 1238 | case LTTNG_DOMAIN_LOG4J2: |
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 | { | |
abfedd7d | 1251 | auto *entry = lttng::utils::container_of(head, &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 | |
07c4863f | 1264 | const lttng::urcu::read_lock_guard read_lock; |
56047f5a | 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: | |
47abf22b | 1283 | case LTTNG_DOMAIN_LOG4J2: |
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); |
00d7d903 | 1306 | node = lttng_ht_iter_get_node<lttng_ht_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 | } | |
a5a21280 | 1333 | end: |
56047f5a | 1334 | return; |
90aa04a1 FD |
1335 | } |
1336 | ||
cd9adb8b | 1337 | void event_notifier_error_accounting_fini() |
90aa04a1 | 1338 | { |
a5a21280 FD |
1339 | if (kernel_error_accounting_entry.error_counter_fd) { |
1340 | const int ret = close(kernel_error_accounting_entry.error_counter_fd); | |
90aa04a1 FD |
1341 | |
1342 | if (ret) { | |
1343 | PERROR("Failed to close kernel event notifier error counter"); | |
1344 | } | |
1345 | } | |
1346 | ||
533a90fb FD |
1347 | lttng_ht_destroy(error_counter_uid_ht); |
1348 | ||
761ffce2 FD |
1349 | fini_error_accounting_state(&kernel_state); |
1350 | fini_error_accounting_state(&ust_state); | |
90aa04a1 | 1351 | } |