Commit | Line | Data |
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b7cdc182 | 1 | /* SPDX-License-Identifier: (GPL-2.0-only or LGPL-2.1-only) |
9f36eaed | 2 | * |
a90917c3 | 3 | * lttng-events.c |
4e3c1b9b | 4 | * |
4e3c1b9b | 5 | * Holds LTTng per-session event registry. |
17baffe2 | 6 | * |
886d51a3 | 7 | * Copyright (C) 2010-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
4e3c1b9b MD |
8 | */ |
9 | ||
389d7070 MD |
10 | /* |
11 | * This page_alloc.h wrapper needs to be included before gfpflags.h because it | |
12 | * overrides a function with a define. | |
13 | */ | |
14 | #include "wrapper/page_alloc.h" | |
15 | ||
4e3c1b9b | 16 | #include <linux/module.h> |
c0e31d2e MD |
17 | #include <linux/mutex.h> |
18 | #include <linux/sched.h> | |
11b5a3c2 | 19 | #include <linux/slab.h> |
c099397a | 20 | #include <linux/jiffies.h> |
99dc9597 | 21 | #include <linux/utsname.h> |
abc0446a | 22 | #include <linux/err.h> |
7e6f9ef6 MD |
23 | #include <linux/seq_file.h> |
24 | #include <linux/file.h> | |
25 | #include <linux/anon_inodes.h> | |
241ae9a8 | 26 | #include <wrapper/file.h> |
8c6e7f13 | 27 | #include <linux/uaccess.h> |
a606b6e8 | 28 | #include <linux/vmalloc.h> |
c88f762e | 29 | #include <linux/dmi.h> |
3c997079 | 30 | |
c190d76e | 31 | #include <wrapper/compiler_attributes.h> |
a7008254 | 32 | #include <wrapper/uuid.h> |
263b6c88 | 33 | #include <wrapper/vmalloc.h> /* for wrapper_vmalloc_sync_mappings() */ |
241ae9a8 MD |
34 | #include <wrapper/random.h> |
35 | #include <wrapper/tracepoint.h> | |
36 | #include <wrapper/list.h> | |
cbc19040 | 37 | #include <wrapper/types.h> |
2df37e95 MD |
38 | #include <lttng/kernel-version.h> |
39 | #include <lttng/events.h> | |
92bc1e23 | 40 | #include <lttng/events-internal.h> |
0b365677 | 41 | #include <lttng/lttng-bytecode.h> |
2df37e95 | 42 | #include <lttng/tracer.h> |
21f58fb7 | 43 | #include <lttng/event-notifier-notification.h> |
2df37e95 MD |
44 | #include <lttng/abi-old.h> |
45 | #include <lttng/endian.h> | |
46 | #include <lttng/string-utils.h> | |
4a11ef1c | 47 | #include <lttng/utils.h> |
24591303 MD |
48 | #include <ringbuffer/backend.h> |
49 | #include <ringbuffer/frontend.h> | |
3636085f | 50 | #include <wrapper/time.h> |
4e3c1b9b | 51 | |
d83004aa JD |
52 | #define METADATA_CACHE_DEFAULT_SIZE 4096 |
53 | ||
4e3c1b9b | 54 | static LIST_HEAD(sessions); |
750b05f2 | 55 | static LIST_HEAD(event_notifier_groups); |
a90917c3 | 56 | static LIST_HEAD(lttng_transport_list); |
a101fa10 | 57 | static LIST_HEAD(lttng_counter_transport_list); |
d83004aa JD |
58 | /* |
59 | * Protect the sessions and metadata caches. | |
60 | */ | |
4e3c1b9b | 61 | static DEFINE_MUTEX(sessions_mutex); |
a67ba386 MD |
62 | static struct kmem_cache *event_recorder_cache; |
63 | static struct kmem_cache *event_recorder_private_cache; | |
dffef45d | 64 | static struct kmem_cache *event_notifier_cache; |
a67ba386 | 65 | static struct kmem_cache *event_notifier_private_cache; |
4e3c1b9b | 66 | |
8cdc1a81 MD |
67 | static void lttng_session_lazy_sync_event_enablers(struct lttng_kernel_session *session); |
68 | static void lttng_session_sync_event_enablers(struct lttng_kernel_session *session); | |
b01155ba | 69 | static void lttng_event_notifier_group_sync_enablers(struct lttng_event_notifier_group *event_notifier_group); |
7b25ab0e | 70 | static void lttng_event_enabler_sync(struct lttng_event_enabler_common *event_enabler); |
3c997079 | 71 | |
0648898e | 72 | static void _lttng_event_destroy(struct lttng_kernel_event_common *event); |
f7d06400 | 73 | static void _lttng_channel_destroy(struct lttng_kernel_channel_buffer *chan); |
96c59af1 | 74 | static int _lttng_event_recorder_unregister(struct lttng_kernel_event_recorder *event); |
a67ba386 | 75 | static int _lttng_event_notifier_unregister(struct lttng_kernel_event_notifier *event_notifier); |
c099397a | 76 | static |
8cdc1a81 | 77 | int _lttng_event_metadata_statedump(struct lttng_kernel_session *session, |
f7d06400 | 78 | struct lttng_kernel_channel_buffer *chan, |
a67ba386 | 79 | struct lttng_kernel_event_recorder *event); |
c099397a | 80 | static |
8cdc1a81 | 81 | int _lttng_session_metadata_statedump(struct lttng_kernel_session *session); |
d83004aa JD |
82 | static |
83 | void _lttng_metadata_channel_hangup(struct lttng_metadata_stream *stream); | |
f513b2bf | 84 | static |
8cdc1a81 | 85 | int _lttng_type_statedump(struct lttng_kernel_session *session, |
437d5aa5 MD |
86 | const struct lttng_kernel_type_common *type, |
87 | enum lttng_kernel_string_encoding parent_encoding, | |
ceabb767 MD |
88 | size_t nesting); |
89 | static | |
8cdc1a81 | 90 | int _lttng_field_statedump(struct lttng_kernel_session *session, |
437d5aa5 | 91 | const struct lttng_kernel_event_field *field, |
51ef4536 | 92 | size_t nesting, const char **prev_field_name_p); |
c099397a | 93 | |
c099397a | 94 | void synchronize_trace(void) |
abcca994 | 95 | { |
05355f0b MJ |
96 | #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,1,0) || \ |
97 | LTTNG_RHEL_KERNEL_RANGE(4,18,0,193,0,0, 4,19,0,0,0,0)) | |
92da05ce MJ |
98 | synchronize_rcu(); |
99 | #else | |
abcca994 | 100 | synchronize_sched(); |
92da05ce MJ |
101 | #endif |
102 | ||
5f4c791e | 103 | #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,4,0)) |
b8590f40 MD |
104 | #ifdef CONFIG_PREEMPT_RT_FULL |
105 | synchronize_rcu(); | |
106 | #endif | |
5f4c791e | 107 | #else /* (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,4,0)) */ |
abcca994 MD |
108 | #ifdef CONFIG_PREEMPT_RT |
109 | synchronize_rcu(); | |
110 | #endif | |
5f4c791e | 111 | #endif /* (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,4,0)) */ |
abcca994 MD |
112 | } |
113 | ||
3c997079 MD |
114 | void lttng_lock_sessions(void) |
115 | { | |
116 | mutex_lock(&sessions_mutex); | |
117 | } | |
118 | ||
119 | void lttng_unlock_sessions(void) | |
120 | { | |
121 | mutex_unlock(&sessions_mutex); | |
122 | } | |
123 | ||
9fe593d2 FD |
124 | static struct lttng_transport *lttng_transport_find(const char *name) |
125 | { | |
126 | struct lttng_transport *transport; | |
127 | ||
128 | list_for_each_entry(transport, <tng_transport_list, node) { | |
129 | if (!strcmp(transport->name, name)) | |
130 | return transport; | |
131 | } | |
132 | return NULL; | |
133 | } | |
134 | ||
3c997079 MD |
135 | /* |
136 | * Called with sessions lock held. | |
137 | */ | |
138 | int lttng_session_active(void) | |
139 | { | |
8cdc1a81 | 140 | struct lttng_kernel_session_private *iter; |
3c997079 MD |
141 | |
142 | list_for_each_entry(iter, &sessions, list) { | |
8cdc1a81 | 143 | if (iter->pub->active) |
3c997079 MD |
144 | return 1; |
145 | } | |
146 | return 0; | |
147 | } | |
148 | ||
8cdc1a81 | 149 | struct lttng_kernel_session *lttng_session_create(void) |
4e3c1b9b | 150 | { |
8cdc1a81 MD |
151 | struct lttng_kernel_session *session; |
152 | struct lttng_kernel_session_private *session_priv; | |
d83004aa | 153 | struct lttng_metadata_cache *metadata_cache; |
3c997079 | 154 | int i; |
4e3c1b9b MD |
155 | |
156 | mutex_lock(&sessions_mutex); | |
8cdc1a81 | 157 | session = lttng_kvzalloc(sizeof(*session), GFP_KERNEL); |
4e3c1b9b | 158 | if (!session) |
d83004aa | 159 | goto err; |
8cdc1a81 MD |
160 | session_priv = lttng_kvzalloc(sizeof(*session_priv), GFP_KERNEL); |
161 | if (!session_priv) | |
162 | goto err_free_session; | |
163 | session->priv = session_priv; | |
164 | session_priv->pub = session; | |
165 | ||
166 | INIT_LIST_HEAD(&session_priv->chan); | |
167 | INIT_LIST_HEAD(&session_priv->events); | |
168 | lttng_guid_gen(&session_priv->uuid); | |
d83004aa JD |
169 | |
170 | metadata_cache = kzalloc(sizeof(struct lttng_metadata_cache), | |
171 | GFP_KERNEL); | |
172 | if (!metadata_cache) | |
8cdc1a81 | 173 | goto err_free_session_private; |
0ca42eb7 | 174 | metadata_cache->data = vzalloc(METADATA_CACHE_DEFAULT_SIZE); |
d83004aa JD |
175 | if (!metadata_cache->data) |
176 | goto err_free_cache; | |
177 | metadata_cache->cache_alloc = METADATA_CACHE_DEFAULT_SIZE; | |
178 | kref_init(&metadata_cache->refcount); | |
92d9f5e6 | 179 | mutex_init(&metadata_cache->lock); |
8cdc1a81 | 180 | session_priv->metadata_cache = metadata_cache; |
d83004aa | 181 | INIT_LIST_HEAD(&metadata_cache->metadata_stream); |
8cdc1a81 | 182 | memcpy(&metadata_cache->uuid, &session_priv->uuid, |
a36580d5 | 183 | sizeof(metadata_cache->uuid)); |
8cdc1a81 | 184 | INIT_LIST_HEAD(&session_priv->enablers_head); |
3c997079 | 185 | for (i = 0; i < LTTNG_EVENT_HT_SIZE; i++) |
8cdc1a81 MD |
186 | INIT_HLIST_HEAD(&session_priv->events_ht.table[i]); |
187 | list_add(&session_priv->list, &sessions); | |
188 | ||
8c0393c3 MD |
189 | if (lttng_id_tracker_init(&session->pid_tracker, session, TRACKER_PID)) |
190 | goto tracker_alloc_error; | |
191 | if (lttng_id_tracker_init(&session->vpid_tracker, session, TRACKER_VPID)) | |
192 | goto tracker_alloc_error; | |
193 | if (lttng_id_tracker_init(&session->uid_tracker, session, TRACKER_UID)) | |
194 | goto tracker_alloc_error; | |
195 | if (lttng_id_tracker_init(&session->vuid_tracker, session, TRACKER_VUID)) | |
196 | goto tracker_alloc_error; | |
197 | if (lttng_id_tracker_init(&session->gid_tracker, session, TRACKER_GID)) | |
198 | goto tracker_alloc_error; | |
199 | if (lttng_id_tracker_init(&session->vgid_tracker, session, TRACKER_VGID)) | |
200 | goto tracker_alloc_error; | |
201 | ||
4e3c1b9b | 202 | mutex_unlock(&sessions_mutex); |
8cdc1a81 | 203 | |
4e3c1b9b | 204 | return session; |
d83004aa | 205 | |
8c0393c3 MD |
206 | tracker_alloc_error: |
207 | lttng_id_tracker_fini(&session->pid_tracker); | |
208 | lttng_id_tracker_fini(&session->vpid_tracker); | |
209 | lttng_id_tracker_fini(&session->uid_tracker); | |
210 | lttng_id_tracker_fini(&session->vuid_tracker); | |
211 | lttng_id_tracker_fini(&session->gid_tracker); | |
212 | lttng_id_tracker_fini(&session->vgid_tracker); | |
d83004aa JD |
213 | err_free_cache: |
214 | kfree(metadata_cache); | |
8cdc1a81 MD |
215 | err_free_session_private: |
216 | lttng_kvfree(session_priv); | |
d83004aa | 217 | err_free_session: |
48f5e0b5 | 218 | lttng_kvfree(session); |
d83004aa JD |
219 | err: |
220 | mutex_unlock(&sessions_mutex); | |
221 | return NULL; | |
222 | } | |
223 | ||
99f52fcc FD |
224 | static |
225 | struct lttng_counter_transport *lttng_counter_transport_find(const char *name) | |
226 | { | |
227 | struct lttng_counter_transport *transport; | |
228 | ||
229 | list_for_each_entry(transport, <tng_counter_transport_list, node) { | |
230 | if (!strcmp(transport->name, name)) | |
231 | return transport; | |
232 | } | |
233 | return NULL; | |
234 | } | |
235 | ||
236 | struct lttng_counter *lttng_kernel_counter_create( | |
237 | const char *counter_transport_name, | |
238 | size_t number_dimensions, const size_t *dimensions_sizes) | |
239 | { | |
240 | struct lttng_counter *counter = NULL; | |
241 | struct lttng_counter_transport *counter_transport = NULL; | |
242 | ||
243 | counter_transport = lttng_counter_transport_find(counter_transport_name); | |
244 | if (!counter_transport) { | |
245 | printk(KERN_WARNING "LTTng: counter transport %s not found.\n", | |
246 | counter_transport_name); | |
247 | goto notransport; | |
248 | } | |
249 | if (!try_module_get(counter_transport->owner)) { | |
250 | printk(KERN_WARNING "LTTng: Can't lock counter transport module.\n"); | |
251 | goto notransport; | |
252 | } | |
253 | ||
254 | counter = lttng_kvzalloc(sizeof(struct lttng_counter), GFP_KERNEL); | |
255 | if (!counter) | |
256 | goto nomem; | |
257 | ||
258 | /* Create event notifier error counter. */ | |
259 | counter->ops = &counter_transport->ops; | |
260 | counter->transport = counter_transport; | |
261 | ||
262 | counter->counter = counter->ops->counter_create( | |
263 | number_dimensions, dimensions_sizes, 0); | |
264 | if (!counter->counter) { | |
265 | goto create_error; | |
266 | } | |
267 | ||
268 | return counter; | |
269 | ||
270 | create_error: | |
271 | lttng_kvfree(counter); | |
272 | nomem: | |
273 | if (counter_transport) | |
274 | module_put(counter_transport->owner); | |
275 | notransport: | |
276 | return NULL; | |
277 | } | |
278 | ||
750b05f2 FD |
279 | struct lttng_event_notifier_group *lttng_event_notifier_group_create(void) |
280 | { | |
281 | struct lttng_transport *transport = NULL; | |
282 | struct lttng_event_notifier_group *event_notifier_group; | |
283 | const char *transport_name = "relay-event-notifier"; | |
284 | size_t subbuf_size = 4096; //TODO | |
285 | size_t num_subbuf = 16; //TODO | |
286 | unsigned int switch_timer_interval = 0; | |
287 | unsigned int read_timer_interval = 0; | |
dffef45d | 288 | int i; |
750b05f2 FD |
289 | |
290 | mutex_lock(&sessions_mutex); | |
291 | ||
292 | transport = lttng_transport_find(transport_name); | |
293 | if (!transport) { | |
294 | printk(KERN_WARNING "LTTng: transport %s not found\n", | |
295 | transport_name); | |
296 | goto notransport; | |
297 | } | |
298 | if (!try_module_get(transport->owner)) { | |
299 | printk(KERN_WARNING "LTTng: Can't lock transport %s module.\n", | |
300 | transport_name); | |
301 | goto notransport; | |
302 | } | |
303 | ||
304 | event_notifier_group = lttng_kvzalloc(sizeof(struct lttng_event_notifier_group), | |
305 | GFP_KERNEL); | |
306 | if (!event_notifier_group) | |
307 | goto nomem; | |
308 | ||
309 | /* | |
310 | * Initialize the ring buffer used to store event notifier | |
311 | * notifications. | |
312 | */ | |
313 | event_notifier_group->ops = &transport->ops; | |
4a399b76 | 314 | event_notifier_group->chan = transport->ops.priv->channel_create( |
750b05f2 FD |
315 | transport_name, event_notifier_group, NULL, |
316 | subbuf_size, num_subbuf, switch_timer_interval, | |
317 | read_timer_interval); | |
318 | if (!event_notifier_group->chan) | |
319 | goto create_error; | |
320 | ||
321 | event_notifier_group->transport = transport; | |
dffef45d FD |
322 | |
323 | INIT_LIST_HEAD(&event_notifier_group->enablers_head); | |
324 | INIT_LIST_HEAD(&event_notifier_group->event_notifiers_head); | |
325 | for (i = 0; i < LTTNG_EVENT_NOTIFIER_HT_SIZE; i++) | |
326 | INIT_HLIST_HEAD(&event_notifier_group->event_notifiers_ht.table[i]); | |
327 | ||
750b05f2 FD |
328 | list_add(&event_notifier_group->node, &event_notifier_groups); |
329 | ||
330 | mutex_unlock(&sessions_mutex); | |
331 | ||
332 | return event_notifier_group; | |
333 | ||
334 | create_error: | |
335 | lttng_kvfree(event_notifier_group); | |
336 | nomem: | |
337 | if (transport) | |
338 | module_put(transport->owner); | |
339 | notransport: | |
340 | mutex_unlock(&sessions_mutex); | |
341 | return NULL; | |
342 | } | |
343 | ||
d83004aa JD |
344 | void metadata_cache_destroy(struct kref *kref) |
345 | { | |
346 | struct lttng_metadata_cache *cache = | |
347 | container_of(kref, struct lttng_metadata_cache, refcount); | |
a606b6e8 | 348 | vfree(cache->data); |
d83004aa | 349 | kfree(cache); |
4e3c1b9b MD |
350 | } |
351 | ||
8cdc1a81 | 352 | void lttng_session_destroy(struct lttng_kernel_session *session) |
4e3c1b9b | 353 | { |
f7d06400 | 354 | struct lttng_kernel_channel_buffer_private *chan_priv, *tmpchan_priv; |
a67ba386 | 355 | struct lttng_kernel_event_recorder_private *event_recorder_priv, *tmpevent_recorder_priv; |
d83004aa | 356 | struct lttng_metadata_stream *metadata_stream; |
44b1abdc | 357 | struct lttng_event_recorder_enabler *event_recorder_enabler, *tmp_event_recorder_enabler; |
dda6a249 | 358 | int ret; |
4e3c1b9b MD |
359 | |
360 | mutex_lock(&sessions_mutex); | |
a8f2d0c7 | 361 | WRITE_ONCE(session->active, 0); |
f7d06400 | 362 | list_for_each_entry(chan_priv, &session->priv->chan, node) { |
6053e75e | 363 | ret = lttng_syscalls_unregister_syscall_table(&chan_priv->parent.syscall_table); |
1ec65de1 MD |
364 | WARN_ON(ret); |
365 | } | |
8cdc1a81 | 366 | list_for_each_entry(event_recorder_priv, &session->priv->events, node) { |
96c59af1 | 367 | ret = _lttng_event_recorder_unregister(event_recorder_priv->pub); |
dda6a249 MD |
368 | WARN_ON(ret); |
369 | } | |
abcca994 | 370 | synchronize_trace(); /* Wait for in-flight events to complete */ |
f7d06400 | 371 | list_for_each_entry(chan_priv, &session->priv->chan, node) { |
6053e75e | 372 | ret = lttng_syscalls_destroy_syscall_table(&chan_priv->parent.syscall_table); |
badfe9f5 MD |
373 | WARN_ON(ret); |
374 | } | |
44b1abdc | 375 | list_for_each_entry_safe(event_recorder_enabler, tmp_event_recorder_enabler, |
8cdc1a81 | 376 | &session->priv->enablers_head, node) |
44b1abdc | 377 | lttng_event_enabler_destroy(&event_recorder_enabler->parent); |
8cdc1a81 | 378 | list_for_each_entry_safe(event_recorder_priv, tmpevent_recorder_priv, &session->priv->events, node) |
0648898e | 379 | _lttng_event_destroy(&event_recorder_priv->pub->parent); |
f7d06400 MD |
380 | list_for_each_entry_safe(chan_priv, tmpchan_priv, &session->priv->chan, node) { |
381 | BUG_ON(chan_priv->channel_type == METADATA_CHANNEL); | |
382 | _lttng_channel_destroy(chan_priv->pub); | |
d83004aa | 383 | } |
8cdc1a81 MD |
384 | mutex_lock(&session->priv->metadata_cache->lock); |
385 | list_for_each_entry(metadata_stream, &session->priv->metadata_cache->metadata_stream, list) | |
d83004aa | 386 | _lttng_metadata_channel_hangup(metadata_stream); |
8cdc1a81 | 387 | mutex_unlock(&session->priv->metadata_cache->lock); |
8c0393c3 MD |
388 | lttng_id_tracker_fini(&session->pid_tracker); |
389 | lttng_id_tracker_fini(&session->vpid_tracker); | |
390 | lttng_id_tracker_fini(&session->uid_tracker); | |
391 | lttng_id_tracker_fini(&session->vuid_tracker); | |
392 | lttng_id_tracker_fini(&session->gid_tracker); | |
393 | lttng_id_tracker_fini(&session->vgid_tracker); | |
8cdc1a81 MD |
394 | kref_put(&session->priv->metadata_cache->refcount, metadata_cache_destroy); |
395 | list_del(&session->priv->list); | |
4e3c1b9b | 396 | mutex_unlock(&sessions_mutex); |
8cdc1a81 | 397 | lttng_kvfree(session->priv); |
48f5e0b5 | 398 | lttng_kvfree(session); |
4e3c1b9b MD |
399 | } |
400 | ||
dffef45d FD |
401 | void lttng_event_notifier_group_destroy( |
402 | struct lttng_event_notifier_group *event_notifier_group) | |
750b05f2 | 403 | { |
dffef45d | 404 | struct lttng_event_notifier_enabler *event_notifier_enabler, *tmp_event_notifier_enabler; |
a67ba386 | 405 | struct lttng_kernel_event_notifier_private *event_notifier_priv, *tmpevent_notifier_priv; |
dffef45d FD |
406 | int ret; |
407 | ||
750b05f2 FD |
408 | if (!event_notifier_group) |
409 | return; | |
410 | ||
411 | mutex_lock(&sessions_mutex); | |
dffef45d | 412 | |
6053e75e | 413 | ret = lttng_syscalls_unregister_syscall_table(&event_notifier_group->syscall_table); |
8a8ac9a8 FD |
414 | WARN_ON(ret); |
415 | ||
a67ba386 MD |
416 | list_for_each_entry_safe(event_notifier_priv, tmpevent_notifier_priv, |
417 | &event_notifier_group->event_notifiers_head, node) { | |
418 | ret = _lttng_event_notifier_unregister(event_notifier_priv->pub); | |
dffef45d FD |
419 | WARN_ON(ret); |
420 | } | |
421 | ||
b01155ba FD |
422 | /* Wait for in-flight event notifier to complete */ |
423 | synchronize_trace(); | |
424 | ||
21f58fb7 FD |
425 | irq_work_sync(&event_notifier_group->wakeup_pending); |
426 | ||
6053e75e MD |
427 | ret = lttng_syscalls_destroy_syscall_table(&event_notifier_group->syscall_table); |
428 | WARN_ON(ret); | |
8a8ac9a8 | 429 | |
dffef45d FD |
430 | list_for_each_entry_safe(event_notifier_enabler, tmp_event_notifier_enabler, |
431 | &event_notifier_group->enablers_head, node) | |
44b1abdc | 432 | lttng_event_enabler_destroy(&event_notifier_enabler->parent); |
dffef45d | 433 | |
a67ba386 MD |
434 | list_for_each_entry_safe(event_notifier_priv, tmpevent_notifier_priv, |
435 | &event_notifier_group->event_notifiers_head, node) | |
0648898e | 436 | _lttng_event_destroy(&event_notifier_priv->pub->parent); |
dffef45d | 437 | |
99f52fcc FD |
438 | if (event_notifier_group->error_counter) { |
439 | struct lttng_counter *error_counter = event_notifier_group->error_counter; | |
ab04d7b1 | 440 | |
99f52fcc FD |
441 | error_counter->ops->counter_destroy(error_counter->counter); |
442 | module_put(error_counter->transport->owner); | |
443 | lttng_kvfree(error_counter); | |
444 | event_notifier_group->error_counter = NULL; | |
445 | } | |
446 | ||
4a399b76 | 447 | event_notifier_group->ops->priv->channel_destroy(event_notifier_group->chan); |
750b05f2 FD |
448 | module_put(event_notifier_group->transport->owner); |
449 | list_del(&event_notifier_group->node); | |
dffef45d | 450 | |
750b05f2 FD |
451 | mutex_unlock(&sessions_mutex); |
452 | lttng_kvfree(event_notifier_group); | |
453 | } | |
454 | ||
8cdc1a81 | 455 | int lttng_session_statedump(struct lttng_kernel_session *session) |
601252cf MD |
456 | { |
457 | int ret; | |
458 | ||
459 | mutex_lock(&sessions_mutex); | |
460 | ret = lttng_statedump_start(session); | |
461 | mutex_unlock(&sessions_mutex); | |
462 | return ret; | |
463 | } | |
464 | ||
8cdc1a81 | 465 | int lttng_session_enable(struct lttng_kernel_session *session) |
c0e31d2e MD |
466 | { |
467 | int ret = 0; | |
f7d06400 | 468 | struct lttng_kernel_channel_buffer_private *chan_priv; |
c0e31d2e MD |
469 | |
470 | mutex_lock(&sessions_mutex); | |
471 | if (session->active) { | |
472 | ret = -EBUSY; | |
473 | goto end; | |
474 | } | |
c099397a | 475 | |
3c997079 | 476 | /* Set transient enabler state to "enabled" */ |
8cdc1a81 | 477 | session->priv->tstate = 1; |
3c997079 | 478 | |
4ef81e4a | 479 | /* We need to sync enablers with session before activation. */ |
b2bc0bc8 | 480 | lttng_session_sync_event_enablers(session); |
4ef81e4a | 481 | |
c099397a MD |
482 | /* |
483 | * Snapshot the number of events per channel to know the type of header | |
484 | * we need to use. | |
485 | */ | |
f7d06400 MD |
486 | list_for_each_entry(chan_priv, &session->priv->chan, node) { |
487 | if (chan_priv->header_type) | |
488 | continue; /* don't change it if session stop/restart */ | |
489 | if (chan_priv->free_event_id < 31) | |
490 | chan_priv->header_type = 1; /* compact */ | |
c099397a | 491 | else |
f7d06400 | 492 | chan_priv->header_type = 2; /* large */ |
c099397a MD |
493 | } |
494 | ||
64af2437 | 495 | /* Clear each stream's quiescent state. */ |
f7d06400 MD |
496 | list_for_each_entry(chan_priv, &session->priv->chan, node) { |
497 | if (chan_priv->channel_type != METADATA_CHANNEL) | |
498 | lib_ring_buffer_clear_quiescent_channel(chan_priv->rb_chan); | |
09b93db9 | 499 | } |
64af2437 | 500 | |
a8f2d0c7 | 501 | WRITE_ONCE(session->active, 1); |
8cdc1a81 | 502 | WRITE_ONCE(session->priv->been_active, 1); |
a90917c3 | 503 | ret = _lttng_session_metadata_statedump(session); |
c337ddc2 | 504 | if (ret) { |
a8f2d0c7 | 505 | WRITE_ONCE(session->active, 0); |
c337ddc2 MD |
506 | goto end; |
507 | } | |
508 | ret = lttng_statedump_start(session); | |
360f38ea | 509 | if (ret) |
a8f2d0c7 | 510 | WRITE_ONCE(session->active, 0); |
c0e31d2e MD |
511 | end: |
512 | mutex_unlock(&sessions_mutex); | |
11b5a3c2 | 513 | return ret; |
c0e31d2e MD |
514 | } |
515 | ||
8cdc1a81 | 516 | int lttng_session_disable(struct lttng_kernel_session *session) |
c0e31d2e MD |
517 | { |
518 | int ret = 0; | |
f7d06400 | 519 | struct lttng_kernel_channel_buffer_private *chan_priv; |
c0e31d2e MD |
520 | |
521 | mutex_lock(&sessions_mutex); | |
522 | if (!session->active) { | |
523 | ret = -EBUSY; | |
524 | goto end; | |
525 | } | |
a8f2d0c7 | 526 | WRITE_ONCE(session->active, 0); |
3c997079 MD |
527 | |
528 | /* Set transient enabler state to "disabled" */ | |
8cdc1a81 | 529 | session->priv->tstate = 0; |
b2bc0bc8 | 530 | lttng_session_sync_event_enablers(session); |
64af2437 MD |
531 | |
532 | /* Set each stream's quiescent state. */ | |
f7d06400 MD |
533 | list_for_each_entry(chan_priv, &session->priv->chan, node) { |
534 | if (chan_priv->channel_type != METADATA_CHANNEL) | |
535 | lib_ring_buffer_set_quiescent_channel(chan_priv->rb_chan); | |
09b93db9 | 536 | } |
c0e31d2e MD |
537 | end: |
538 | mutex_unlock(&sessions_mutex); | |
11b5a3c2 | 539 | return ret; |
c0e31d2e MD |
540 | } |
541 | ||
8cdc1a81 | 542 | int lttng_session_metadata_regenerate(struct lttng_kernel_session *session) |
9616f0bf JD |
543 | { |
544 | int ret = 0; | |
f7d06400 | 545 | struct lttng_kernel_channel_buffer_private *chan_priv; |
a67ba386 | 546 | struct lttng_kernel_event_recorder_private *event_recorder_priv; |
8cdc1a81 | 547 | struct lttng_metadata_cache *cache = session->priv->metadata_cache; |
9616f0bf JD |
548 | struct lttng_metadata_stream *stream; |
549 | ||
550 | mutex_lock(&sessions_mutex); | |
551 | if (!session->active) { | |
552 | ret = -EBUSY; | |
553 | goto end; | |
554 | } | |
555 | ||
556 | mutex_lock(&cache->lock); | |
557 | memset(cache->data, 0, cache->cache_alloc); | |
558 | cache->metadata_written = 0; | |
559 | cache->version++; | |
8cdc1a81 | 560 | list_for_each_entry(stream, &session->priv->metadata_cache->metadata_stream, list) { |
9616f0bf JD |
561 | stream->metadata_out = 0; |
562 | stream->metadata_in = 0; | |
563 | } | |
564 | mutex_unlock(&cache->lock); | |
565 | ||
8cdc1a81 | 566 | session->priv->metadata_dumped = 0; |
f7d06400 MD |
567 | list_for_each_entry(chan_priv, &session->priv->chan, node) { |
568 | chan_priv->metadata_dumped = 0; | |
9616f0bf JD |
569 | } |
570 | ||
8cdc1a81 | 571 | list_for_each_entry(event_recorder_priv, &session->priv->events, node) { |
a67ba386 | 572 | event_recorder_priv->metadata_dumped = 0; |
9616f0bf JD |
573 | } |
574 | ||
575 | ret = _lttng_session_metadata_statedump(session); | |
576 | ||
577 | end: | |
578 | mutex_unlock(&sessions_mutex); | |
579 | return ret; | |
580 | } | |
581 | ||
6b757027 MD |
582 | static |
583 | bool is_channel_buffer_metadata(struct lttng_kernel_channel_common *channel) | |
584 | { | |
585 | struct lttng_kernel_channel_buffer *chan_buf; | |
586 | ||
587 | if (channel->type != LTTNG_KERNEL_CHANNEL_TYPE_BUFFER) | |
588 | return false; | |
589 | chan_buf = container_of(channel, struct lttng_kernel_channel_buffer, parent); | |
590 | if (chan_buf->priv->channel_type == METADATA_CHANNEL) | |
591 | return true; | |
592 | return false; | |
593 | } | |
594 | ||
595 | int lttng_channel_enable(struct lttng_kernel_channel_common *channel) | |
e64957da | 596 | { |
3c997079 | 597 | int ret = 0; |
e64957da | 598 | |
3c997079 | 599 | mutex_lock(&sessions_mutex); |
6b757027 | 600 | if (is_channel_buffer_metadata(channel)) { |
3c997079 MD |
601 | ret = -EPERM; |
602 | goto end; | |
603 | } | |
6b757027 | 604 | if (channel->enabled) { |
3c997079 MD |
605 | ret = -EEXIST; |
606 | goto end; | |
607 | } | |
608 | /* Set transient enabler state to "enabled" */ | |
6b757027 MD |
609 | channel->priv->tstate = 1; |
610 | lttng_session_sync_event_enablers(channel->session); | |
3c997079 | 611 | /* Set atomically the state to "enabled" */ |
6b757027 | 612 | WRITE_ONCE(channel->enabled, 1); |
3c997079 MD |
613 | end: |
614 | mutex_unlock(&sessions_mutex); | |
615 | return ret; | |
e64957da MD |
616 | } |
617 | ||
6b757027 | 618 | int lttng_channel_disable(struct lttng_kernel_channel_common *channel) |
e64957da | 619 | { |
3c997079 | 620 | int ret = 0; |
e64957da | 621 | |
3c997079 | 622 | mutex_lock(&sessions_mutex); |
6b757027 | 623 | if (is_channel_buffer_metadata(channel)) { |
3c997079 MD |
624 | ret = -EPERM; |
625 | goto end; | |
626 | } | |
6b757027 | 627 | if (!channel->enabled) { |
3c997079 MD |
628 | ret = -EEXIST; |
629 | goto end; | |
630 | } | |
631 | /* Set atomically the state to "disabled" */ | |
6b757027 | 632 | WRITE_ONCE(channel->enabled, 0); |
3c997079 | 633 | /* Set transient enabler state to "enabled" */ |
6b757027 MD |
634 | channel->priv->tstate = 0; |
635 | lttng_session_sync_event_enablers(channel->session); | |
3c997079 MD |
636 | end: |
637 | mutex_unlock(&sessions_mutex); | |
638 | return ret; | |
e64957da MD |
639 | } |
640 | ||
9d993668 | 641 | int lttng_event_enable(struct lttng_kernel_event_common *event) |
e64957da | 642 | { |
3c997079 | 643 | int ret = 0; |
e64957da | 644 | |
3c997079 | 645 | mutex_lock(&sessions_mutex); |
9d993668 MD |
646 | switch (event->type) { |
647 | case LTTNG_KERNEL_EVENT_TYPE_RECORDER: | |
648 | { | |
649 | struct lttng_kernel_event_recorder *event_recorder = | |
650 | container_of(event, struct lttng_kernel_event_recorder, parent); | |
651 | ||
f7d06400 | 652 | if (event_recorder->chan->priv->channel_type == METADATA_CHANNEL) { |
9d993668 MD |
653 | ret = -EPERM; |
654 | goto end; | |
655 | } | |
a0493bef | 656 | break; |
9d993668 MD |
657 | } |
658 | case LTTNG_KERNEL_EVENT_TYPE_NOTIFIER: | |
659 | switch (event->priv->instrumentation) { | |
660 | case LTTNG_KERNEL_ABI_KRETPROBE: | |
661 | ret = -EINVAL; | |
662 | goto end; | |
663 | default: | |
664 | break; | |
665 | } | |
a0493bef MD |
666 | break; |
667 | default: | |
9d993668 | 668 | break; |
a0493bef | 669 | } |
e64957da | 670 | |
9d993668 | 671 | if (event->enabled) { |
3c997079 MD |
672 | ret = -EEXIST; |
673 | goto end; | |
674 | } | |
a67ba386 | 675 | switch (event->priv->instrumentation) { |
c190d76e MJ |
676 | case LTTNG_KERNEL_ABI_TRACEPOINT: |
677 | lttng_fallthrough; | |
606828e4 | 678 | case LTTNG_KERNEL_ABI_SYSCALL: |
a0493bef MD |
679 | ret = -EINVAL; |
680 | break; | |
b4a75708 | 681 | |
c190d76e MJ |
682 | case LTTNG_KERNEL_ABI_KPROBE: |
683 | lttng_fallthrough; | |
606828e4 | 684 | case LTTNG_KERNEL_ABI_UPROBE: |
9d993668 | 685 | WRITE_ONCE(event->enabled, 1); |
a0493bef | 686 | break; |
b4a75708 | 687 | |
606828e4 | 688 | case LTTNG_KERNEL_ABI_KRETPROBE: |
9d993668 | 689 | ret = lttng_kretprobes_event_enable_state(event, 1); |
a0493bef | 690 | break; |
b4a75708 | 691 | |
c190d76e MJ |
692 | case LTTNG_KERNEL_ABI_FUNCTION: |
693 | lttng_fallthrough; | |
694 | case LTTNG_KERNEL_ABI_NOOP: | |
695 | lttng_fallthrough; | |
a0493bef MD |
696 | default: |
697 | WARN_ON_ONCE(1); | |
698 | ret = -EINVAL; | |
699 | } | |
3c997079 MD |
700 | end: |
701 | mutex_unlock(&sessions_mutex); | |
702 | return ret; | |
e64957da MD |
703 | } |
704 | ||
9d993668 | 705 | int lttng_event_disable(struct lttng_kernel_event_common *event) |
dffef45d FD |
706 | { |
707 | int ret = 0; | |
708 | ||
709 | mutex_lock(&sessions_mutex); | |
9d993668 MD |
710 | switch (event->type) { |
711 | case LTTNG_KERNEL_EVENT_TYPE_RECORDER: | |
712 | { | |
713 | struct lttng_kernel_event_recorder *event_recorder = | |
714 | container_of(event, struct lttng_kernel_event_recorder, parent); | |
715 | ||
f7d06400 | 716 | if (event_recorder->chan->priv->channel_type == METADATA_CHANNEL) { |
9d993668 MD |
717 | ret = -EPERM; |
718 | goto end; | |
719 | } | |
b01155ba | 720 | break; |
9d993668 MD |
721 | } |
722 | case LTTNG_KERNEL_EVENT_TYPE_NOTIFIER: | |
723 | switch (event->priv->instrumentation) { | |
724 | case LTTNG_KERNEL_ABI_KRETPROBE: | |
725 | ret = -EINVAL; | |
726 | goto end; | |
727 | default: | |
728 | break; | |
729 | } | |
2b16f0c9 | 730 | break; |
dffef45d | 731 | default: |
9d993668 | 732 | break; |
dffef45d | 733 | } |
dffef45d | 734 | |
a67ba386 | 735 | if (!event->enabled) { |
dffef45d FD |
736 | ret = -EEXIST; |
737 | goto end; | |
738 | } | |
a67ba386 | 739 | switch (event->priv->instrumentation) { |
c190d76e MJ |
740 | case LTTNG_KERNEL_ABI_TRACEPOINT: |
741 | lttng_fallthrough; | |
606828e4 | 742 | case LTTNG_KERNEL_ABI_SYSCALL: |
b01155ba FD |
743 | ret = -EINVAL; |
744 | break; | |
b4a75708 | 745 | |
c190d76e MJ |
746 | case LTTNG_KERNEL_ABI_KPROBE: |
747 | lttng_fallthrough; | |
606828e4 | 748 | case LTTNG_KERNEL_ABI_UPROBE: |
a67ba386 | 749 | WRITE_ONCE(event->enabled, 0); |
2b16f0c9 | 750 | break; |
b4a75708 | 751 | |
9d993668 MD |
752 | case LTTNG_KERNEL_ABI_KRETPROBE: |
753 | ret = lttng_kretprobes_event_enable_state(event, 0); | |
754 | break; | |
755 | ||
c190d76e MJ |
756 | case LTTNG_KERNEL_ABI_FUNCTION: |
757 | lttng_fallthrough; | |
758 | case LTTNG_KERNEL_ABI_NOOP: | |
759 | lttng_fallthrough; | |
dffef45d FD |
760 | default: |
761 | WARN_ON_ONCE(1); | |
762 | ret = -EINVAL; | |
763 | } | |
764 | end: | |
765 | mutex_unlock(&sessions_mutex); | |
766 | return ret; | |
767 | } | |
768 | ||
4e252d1e | 769 | struct lttng_kernel_channel_buffer *lttng_channel_buffer_create(struct lttng_kernel_session *session, |
5dbbdb43 MD |
770 | const char *transport_name, |
771 | void *buf_addr, | |
4e3c1b9b MD |
772 | size_t subbuf_size, size_t num_subbuf, |
773 | unsigned int switch_timer_interval, | |
d83004aa JD |
774 | unsigned int read_timer_interval, |
775 | enum channel_type channel_type) | |
4e3c1b9b | 776 | { |
f7d06400 MD |
777 | struct lttng_kernel_channel_buffer *chan; |
778 | struct lttng_kernel_channel_buffer_private *chan_priv; | |
a90917c3 | 779 | struct lttng_transport *transport = NULL; |
4e3c1b9b MD |
780 | |
781 | mutex_lock(&sessions_mutex); | |
8cdc1a81 | 782 | if (session->priv->been_active && channel_type != METADATA_CHANNEL) |
e5382b6d | 783 | goto active; /* Refuse to add channel to active session */ |
a90917c3 | 784 | transport = lttng_transport_find(transport_name); |
f3d01b96 | 785 | if (!transport) { |
5a15f70c | 786 | printk(KERN_WARNING "LTTng: transport %s not found\n", |
f3d01b96 | 787 | transport_name); |
c0e31d2e | 788 | goto notransport; |
f3d01b96 | 789 | } |
a33c9927 | 790 | if (!try_module_get(transport->owner)) { |
5a15f70c | 791 | printk(KERN_WARNING "LTTng: Can't lock transport module.\n"); |
a33c9927 MD |
792 | goto notransport; |
793 | } | |
f7d06400 | 794 | chan = kzalloc(sizeof(struct lttng_kernel_channel_buffer), GFP_KERNEL); |
4e3c1b9b | 795 | if (!chan) |
c0e31d2e | 796 | goto nomem; |
f7d06400 MD |
797 | chan_priv = kzalloc(sizeof(struct lttng_kernel_channel_buffer_private), GFP_KERNEL); |
798 | if (!chan_priv) | |
799 | goto nomem_priv; | |
800 | chan->priv = chan_priv; | |
801 | chan_priv->pub = chan; | |
802 | chan->parent.type = LTTNG_KERNEL_CHANNEL_TYPE_BUFFER; | |
803 | chan->parent.session = session; | |
804 | chan->priv->id = session->priv->free_chan_id++; | |
3b731ab1 | 805 | chan->ops = &transport->ops; |
125b4df4 MD |
806 | /* |
807 | * Note: the channel creation op already writes into the packet | |
808 | * headers. Therefore the "chan" information used as input | |
809 | * should be already accessible. | |
810 | */ | |
f7d06400 | 811 | chan->priv->rb_chan = transport->ops.priv->channel_create(transport_name, |
5f5ddf01 MD |
812 | chan, buf_addr, subbuf_size, num_subbuf, |
813 | switch_timer_interval, read_timer_interval); | |
f7d06400 | 814 | if (!chan->priv->rb_chan) |
f3d01b96 | 815 | goto create_error; |
f7d06400 MD |
816 | chan->priv->parent.tstate = 1; |
817 | chan->parent.enabled = 1; | |
818 | chan->priv->transport = transport; | |
819 | chan->priv->channel_type = channel_type; | |
820 | list_add(&chan->priv->node, &session->priv->chan); | |
4e3c1b9b MD |
821 | mutex_unlock(&sessions_mutex); |
822 | return chan; | |
823 | ||
f3d01b96 | 824 | create_error: |
f7d06400 MD |
825 | kfree(chan_priv); |
826 | nomem_priv: | |
f3d01b96 | 827 | kfree(chan); |
c0e31d2e | 828 | nomem: |
a33c9927 MD |
829 | if (transport) |
830 | module_put(transport->owner); | |
c0e31d2e | 831 | notransport: |
e5382b6d | 832 | active: |
4e3c1b9b MD |
833 | mutex_unlock(&sessions_mutex); |
834 | return NULL; | |
835 | } | |
836 | ||
837 | /* | |
d83004aa JD |
838 | * Only used internally at session destruction for per-cpu channels, and |
839 | * when metadata channel is released. | |
840 | * Needs to be called with sessions mutex held. | |
4e3c1b9b | 841 | */ |
aa7c23a9 | 842 | static |
f7d06400 | 843 | void _lttng_channel_destroy(struct lttng_kernel_channel_buffer *chan) |
4e3c1b9b | 844 | { |
f7d06400 MD |
845 | chan->ops->priv->channel_destroy(chan->priv->rb_chan); |
846 | module_put(chan->priv->transport->owner); | |
847 | list_del(&chan->priv->node); | |
848 | lttng_kernel_destroy_context(chan->priv->ctx); | |
849 | kfree(chan->priv); | |
4e3c1b9b MD |
850 | kfree(chan); |
851 | } | |
852 | ||
f7d06400 | 853 | void lttng_metadata_channel_destroy(struct lttng_kernel_channel_buffer *chan) |
d83004aa | 854 | { |
f7d06400 | 855 | BUG_ON(chan->priv->channel_type != METADATA_CHANNEL); |
d83004aa JD |
856 | |
857 | /* Protect the metadata cache with the sessions_mutex. */ | |
858 | mutex_lock(&sessions_mutex); | |
859 | _lttng_channel_destroy(chan); | |
860 | mutex_unlock(&sessions_mutex); | |
861 | } | |
862 | EXPORT_SYMBOL_GPL(lttng_metadata_channel_destroy); | |
863 | ||
864 | static | |
865 | void _lttng_metadata_channel_hangup(struct lttng_metadata_stream *stream) | |
866 | { | |
867 | stream->finalized = 1; | |
868 | wake_up_interruptible(&stream->read_wait); | |
869 | } | |
870 | ||
a101fa10 | 871 | |
e5382b6d MD |
872 | /* |
873 | * Supports event creation while tracing session is active. | |
3c997079 | 874 | * Needs to be called with sessions mutex held. |
e5382b6d | 875 | */ |
1ae083ba | 876 | struct lttng_kernel_event_recorder *_lttng_kernel_event_recorder_create(struct lttng_event_recorder_enabler *event_enabler, |
def1e304 | 877 | const struct lttng_kernel_event_desc *event_desc) |
4e3c1b9b | 878 | { |
def1e304 | 879 | struct lttng_kernel_channel_buffer *chan = event_enabler->chan; |
5b9817ae | 880 | struct lttng_kernel_abi_event *event_param = &event_enabler->parent.event_param; |
def1e304 | 881 | enum lttng_kernel_abi_instrumentation itype = event_param->instrumentation; |
f7d06400 | 882 | struct lttng_kernel_session *session = chan->parent.session; |
a67ba386 MD |
883 | struct lttng_kernel_event_recorder *event_recorder; |
884 | struct lttng_kernel_event_recorder_private *event_recorder_priv; | |
3c997079 MD |
885 | const char *event_name; |
886 | struct hlist_head *head; | |
3d084699 | 887 | int ret; |
4e3c1b9b | 888 | |
f7d06400 | 889 | if (chan->priv->free_event_id == -1U) { |
4cf0bf51 | 890 | ret = -EMFILE; |
e5382b6d | 891 | goto full; |
abc0446a | 892 | } |
3c997079 MD |
893 | |
894 | switch (itype) { | |
606828e4 | 895 | case LTTNG_KERNEL_ABI_TRACEPOINT: |
437d5aa5 | 896 | event_name = event_desc->event_name; |
3c997079 | 897 | break; |
b4a75708 | 898 | |
c190d76e MJ |
899 | case LTTNG_KERNEL_ABI_KPROBE: |
900 | lttng_fallthrough; | |
901 | case LTTNG_KERNEL_ABI_UPROBE: | |
902 | lttng_fallthrough; | |
903 | case LTTNG_KERNEL_ABI_KRETPROBE: | |
904 | lttng_fallthrough; | |
606828e4 | 905 | case LTTNG_KERNEL_ABI_SYSCALL: |
3c997079 MD |
906 | event_name = event_param->name; |
907 | break; | |
b4a75708 | 908 | |
c190d76e MJ |
909 | case LTTNG_KERNEL_ABI_FUNCTION: |
910 | lttng_fallthrough; | |
911 | case LTTNG_KERNEL_ABI_NOOP: | |
912 | lttng_fallthrough; | |
3c997079 MD |
913 | default: |
914 | WARN_ON_ONCE(1); | |
915 | ret = -EINVAL; | |
916 | goto type_error; | |
917 | } | |
4a11ef1c | 918 | |
8cdc1a81 | 919 | head = utils_borrow_hash_table_bucket(session->priv->events_ht.table, |
4a11ef1c | 920 | LTTNG_EVENT_HT_SIZE, event_name); |
a67ba386 MD |
921 | lttng_hlist_for_each_entry(event_recorder_priv, head, hlist) { |
922 | WARN_ON_ONCE(!event_recorder_priv->parent.desc); | |
923 | if (!strncmp(event_recorder_priv->parent.desc->event_name, event_name, | |
606828e4 | 924 | LTTNG_KERNEL_ABI_SYM_NAME_LEN - 1) |
a67ba386 | 925 | && chan == event_recorder_priv->pub->chan) { |
3c997079 MD |
926 | ret = -EEXIST; |
927 | goto exist; | |
abc0446a MD |
928 | } |
929 | } | |
3c997079 | 930 | |
a67ba386 MD |
931 | event_recorder = kmem_cache_zalloc(event_recorder_cache, GFP_KERNEL); |
932 | if (!event_recorder) { | |
4cf0bf51 | 933 | ret = -ENOMEM; |
4e3c1b9b | 934 | goto cache_error; |
abc0446a | 935 | } |
a67ba386 MD |
936 | event_recorder_priv = kmem_cache_zalloc(event_recorder_private_cache, GFP_KERNEL); |
937 | if (!event_recorder_priv) { | |
938 | ret = -ENOMEM; | |
939 | goto cache_private_error; | |
940 | } | |
941 | event_recorder_priv->pub = event_recorder; | |
942 | event_recorder_priv->parent.pub = &event_recorder->parent; | |
943 | event_recorder->priv = event_recorder_priv; | |
944 | event_recorder->parent.priv = &event_recorder_priv->parent; | |
945 | event_recorder->parent.type = LTTNG_KERNEL_EVENT_TYPE_RECORDER; | |
946 | ||
8a445457 | 947 | event_recorder->parent.run_filter = lttng_kernel_interpret_event_filter; |
a67ba386 | 948 | event_recorder->chan = chan; |
f7d06400 | 949 | event_recorder->priv->id = chan->priv->free_event_id++; |
a67ba386 MD |
950 | event_recorder->priv->parent.instrumentation = itype; |
951 | INIT_LIST_HEAD(&event_recorder->priv->parent.filter_bytecode_runtime_head); | |
952 | INIT_LIST_HEAD(&event_recorder->priv->parent.enablers_ref_head); | |
3c997079 MD |
953 | |
954 | switch (itype) { | |
606828e4 | 955 | case LTTNG_KERNEL_ABI_TRACEPOINT: |
3c997079 | 956 | /* Event will be enabled by enabler sync. */ |
a67ba386 MD |
957 | event_recorder->parent.enabled = 0; |
958 | event_recorder->priv->parent.registered = 0; | |
959 | event_recorder->priv->parent.desc = lttng_event_desc_get(event_name); | |
960 | if (!event_recorder->priv->parent.desc) { | |
4cf0bf51 | 961 | ret = -ENOENT; |
d3dbe23c | 962 | goto register_error; |
abc0446a | 963 | } |
3c997079 MD |
964 | /* Populate lttng_event structure before event registration. */ |
965 | smp_wmb(); | |
baf20995 | 966 | break; |
b4a75708 | 967 | |
606828e4 | 968 | case LTTNG_KERNEL_ABI_KPROBE: |
a0493bef MD |
969 | /* |
970 | * Needs to be explicitly enabled after creation, since | |
971 | * we may want to apply filters. | |
972 | */ | |
a67ba386 MD |
973 | event_recorder->parent.enabled = 0; |
974 | event_recorder->priv->parent.registered = 1; | |
3c997079 MD |
975 | /* |
976 | * Populate lttng_event structure before event | |
977 | * registration. | |
978 | */ | |
979 | smp_wmb(); | |
8bf17deb | 980 | ret = lttng_kprobes_register_event(event_name, |
f17701fb MD |
981 | event_param->u.kprobe.symbol_name, |
982 | event_param->u.kprobe.offset, | |
983 | event_param->u.kprobe.addr, | |
6a35e5bd | 984 | &event_recorder->parent); |
abc0446a | 985 | if (ret) { |
4cf0bf51 | 986 | ret = -EINVAL; |
d6d808f3 | 987 | goto register_error; |
abc0446a | 988 | } |
a67ba386 | 989 | ret = try_module_get(event_recorder->priv->parent.desc->owner); |
edeb3137 | 990 | WARN_ON_ONCE(!ret); |
d6d808f3 | 991 | break; |
b4a75708 | 992 | |
606828e4 | 993 | case LTTNG_KERNEL_ABI_KRETPROBE: |
7371f44c | 994 | { |
a67ba386 MD |
995 | struct lttng_kernel_event_recorder *event_recorder_return; |
996 | struct lttng_kernel_event_recorder_private *event_recorder_return_priv; | |
7371f44c MD |
997 | |
998 | /* kretprobe defines 2 events */ | |
a0493bef MD |
999 | /* |
1000 | * Needs to be explicitly enabled after creation, since | |
1001 | * we may want to apply filters. | |
1002 | */ | |
a67ba386 MD |
1003 | event_recorder->parent.enabled = 0; |
1004 | event_recorder->priv->parent.registered = 1; | |
1005 | ||
1006 | event_recorder_return = kmem_cache_zalloc(event_recorder_cache, GFP_KERNEL); | |
1007 | if (!event_recorder_return) { | |
1008 | ret = -ENOMEM; | |
1009 | goto register_error; | |
1010 | } | |
1011 | event_recorder_return_priv = kmem_cache_zalloc(event_recorder_private_cache, GFP_KERNEL); | |
1012 | if (!event_recorder_return_priv) { | |
1013 | kmem_cache_free(event_recorder_cache, event_recorder_return); | |
4cf0bf51 | 1014 | ret = -ENOMEM; |
7371f44c | 1015 | goto register_error; |
abc0446a | 1016 | } |
a67ba386 MD |
1017 | event_recorder_return_priv->pub = event_recorder_return; |
1018 | event_recorder_return_priv->parent.pub = &event_recorder_return->parent; | |
1019 | event_recorder_return->priv = event_recorder_return_priv; | |
1020 | event_recorder_return->parent.priv = &event_recorder_return_priv->parent; | |
1021 | event_recorder_return->parent.type = LTTNG_KERNEL_EVENT_TYPE_RECORDER; | |
1022 | ||
8a445457 | 1023 | event_recorder_return->parent.run_filter = lttng_kernel_interpret_event_filter; |
a67ba386 | 1024 | event_recorder_return->chan = chan; |
f7d06400 | 1025 | event_recorder_return->priv->id = chan->priv->free_event_id++; |
a67ba386 MD |
1026 | event_recorder_return->priv->parent.instrumentation = itype; |
1027 | event_recorder_return->parent.enabled = 0; | |
1028 | event_recorder_return->priv->parent.registered = 1; | |
1029 | INIT_LIST_HEAD(&event_recorder_return->priv->parent.filter_bytecode_runtime_head); | |
1030 | INIT_LIST_HEAD(&event_recorder_return->priv->parent.enablers_ref_head); | |
7371f44c | 1031 | /* |
a90917c3 | 1032 | * Populate lttng_event structure before kretprobe registration. |
7371f44c MD |
1033 | */ |
1034 | smp_wmb(); | |
3c997079 | 1035 | ret = lttng_kretprobes_register(event_name, |
7371f44c MD |
1036 | event_param->u.kretprobe.symbol_name, |
1037 | event_param->u.kretprobe.offset, | |
1038 | event_param->u.kretprobe.addr, | |
eb6b47db | 1039 | &event_recorder->parent, &event_recorder_return->parent); |
7371f44c | 1040 | if (ret) { |
a67ba386 MD |
1041 | kmem_cache_free(event_recorder_private_cache, event_recorder_return_priv); |
1042 | kmem_cache_free(event_recorder_cache, event_recorder_return); | |
4cf0bf51 | 1043 | ret = -EINVAL; |
7371f44c MD |
1044 | goto register_error; |
1045 | } | |
1046 | /* Take 2 refs on the module: one per event. */ | |
a67ba386 | 1047 | ret = try_module_get(event_recorder->priv->parent.desc->owner); |
7371f44c | 1048 | WARN_ON_ONCE(!ret); |
a67ba386 | 1049 | ret = try_module_get(event_recorder_return->priv->parent.desc->owner); |
7371f44c | 1050 | WARN_ON_ONCE(!ret); |
f7d06400 | 1051 | ret = _lttng_event_metadata_statedump(chan->parent.session, chan, |
a67ba386 | 1052 | event_recorder_return); |
abc0446a | 1053 | WARN_ON_ONCE(ret > 0); |
7371f44c | 1054 | if (ret) { |
a67ba386 MD |
1055 | kmem_cache_free(event_recorder_private_cache, event_recorder_return_priv); |
1056 | kmem_cache_free(event_recorder_cache, event_recorder_return); | |
1057 | module_put(event_recorder_return->priv->parent.desc->owner); | |
1058 | module_put(event_recorder->priv->parent.desc->owner); | |
7371f44c MD |
1059 | goto statedump_error; |
1060 | } | |
f7d06400 | 1061 | list_add(&event_recorder_return->priv->node, &chan->parent.session->priv->events); |
7371f44c MD |
1062 | break; |
1063 | } | |
b4a75708 | 1064 | |
606828e4 | 1065 | case LTTNG_KERNEL_ABI_SYSCALL: |
a0493bef MD |
1066 | /* |
1067 | * Needs to be explicitly enabled after creation, since | |
1068 | * we may want to apply filters. | |
1069 | */ | |
a67ba386 MD |
1070 | event_recorder->parent.enabled = 0; |
1071 | event_recorder->priv->parent.registered = 0; | |
1072 | event_recorder->priv->parent.desc = event_desc; | |
badfe9f5 | 1073 | switch (event_param->u.syscall.entryexit) { |
606828e4 | 1074 | case LTTNG_KERNEL_ABI_SYSCALL_ENTRYEXIT: |
badfe9f5 MD |
1075 | ret = -EINVAL; |
1076 | goto register_error; | |
606828e4 | 1077 | case LTTNG_KERNEL_ABI_SYSCALL_ENTRY: |
a67ba386 | 1078 | event_recorder->priv->parent.u.syscall.entryexit = LTTNG_SYSCALL_ENTRY; |
badfe9f5 | 1079 | break; |
606828e4 | 1080 | case LTTNG_KERNEL_ABI_SYSCALL_EXIT: |
a67ba386 | 1081 | event_recorder->priv->parent.u.syscall.entryexit = LTTNG_SYSCALL_EXIT; |
badfe9f5 MD |
1082 | break; |
1083 | } | |
1084 | switch (event_param->u.syscall.abi) { | |
606828e4 | 1085 | case LTTNG_KERNEL_ABI_SYSCALL_ABI_ALL: |
badfe9f5 MD |
1086 | ret = -EINVAL; |
1087 | goto register_error; | |
606828e4 | 1088 | case LTTNG_KERNEL_ABI_SYSCALL_ABI_NATIVE: |
a67ba386 | 1089 | event_recorder->priv->parent.u.syscall.abi = LTTNG_SYSCALL_ABI_NATIVE; |
badfe9f5 | 1090 | break; |
606828e4 | 1091 | case LTTNG_KERNEL_ABI_SYSCALL_ABI_COMPAT: |
a67ba386 | 1092 | event_recorder->priv->parent.u.syscall.abi = LTTNG_SYSCALL_ABI_COMPAT; |
badfe9f5 MD |
1093 | break; |
1094 | } | |
a67ba386 | 1095 | if (!event_recorder->priv->parent.desc) { |
4cf0bf51 | 1096 | ret = -EINVAL; |
259b6cb3 | 1097 | goto register_error; |
abc0446a | 1098 | } |
1ec65de1 | 1099 | break; |
b4a75708 | 1100 | |
606828e4 | 1101 | case LTTNG_KERNEL_ABI_UPROBE: |
a344f64b FD |
1102 | /* |
1103 | * Needs to be explicitly enabled after creation, since | |
1104 | * we may want to apply filters. | |
1105 | */ | |
a67ba386 MD |
1106 | event_recorder->parent.enabled = 0; |
1107 | event_recorder->priv->parent.registered = 1; | |
3aed4dca | 1108 | |
a344f64b FD |
1109 | /* |
1110 | * Populate lttng_event structure before event | |
1111 | * registration. | |
1112 | */ | |
1113 | smp_wmb(); | |
149b9a9d | 1114 | |
83b802dc | 1115 | ret = lttng_uprobes_register_event(event_param->name, |
56377c91 | 1116 | event_param->u.uprobe.fd, |
17806c46 | 1117 | &event_recorder->parent); |
149b9a9d YB |
1118 | if (ret) |
1119 | goto register_error; | |
a67ba386 | 1120 | ret = try_module_get(event_recorder->priv->parent.desc->owner); |
149b9a9d YB |
1121 | WARN_ON_ONCE(!ret); |
1122 | break; | |
b4a75708 | 1123 | |
c190d76e MJ |
1124 | case LTTNG_KERNEL_ABI_FUNCTION: |
1125 | lttng_fallthrough; | |
1126 | case LTTNG_KERNEL_ABI_NOOP: | |
1127 | lttng_fallthrough; | |
baf20995 MD |
1128 | default: |
1129 | WARN_ON_ONCE(1); | |
4cf0bf51 | 1130 | ret = -EINVAL; |
df07930b | 1131 | goto register_error; |
baf20995 | 1132 | } |
f7d06400 | 1133 | ret = _lttng_event_metadata_statedump(chan->parent.session, chan, event_recorder); |
abc0446a MD |
1134 | WARN_ON_ONCE(ret > 0); |
1135 | if (ret) { | |
c099397a | 1136 | goto statedump_error; |
abc0446a | 1137 | } |
a67ba386 | 1138 | hlist_add_head(&event_recorder->priv->hlist, head); |
f7d06400 | 1139 | list_add(&event_recorder->priv->node, &chan->parent.session->priv->events); |
a67ba386 | 1140 | return event_recorder; |
4e3c1b9b | 1141 | |
c099397a | 1142 | statedump_error: |
259b6cb3 | 1143 | /* If a statedump error occurs, events will not be readable. */ |
11b5a3c2 | 1144 | register_error: |
a67ba386 MD |
1145 | kmem_cache_free(event_recorder_private_cache, event_recorder_priv); |
1146 | cache_private_error: | |
1147 | kmem_cache_free(event_recorder_cache, event_recorder); | |
4e3c1b9b MD |
1148 | cache_error: |
1149 | exist: | |
3c997079 | 1150 | type_error: |
e5382b6d | 1151 | full: |
4cf0bf51 | 1152 | return ERR_PTR(ret); |
4e3c1b9b MD |
1153 | } |
1154 | ||
a67ba386 | 1155 | struct lttng_kernel_event_notifier *_lttng_event_notifier_create( |
437d5aa5 | 1156 | const struct lttng_kernel_event_desc *event_desc, |
99f52fcc FD |
1157 | uint64_t token, uint64_t error_counter_index, |
1158 | struct lttng_event_notifier_group *event_notifier_group, | |
606828e4 | 1159 | struct lttng_kernel_abi_event_notifier *event_notifier_param, |
a67ba386 | 1160 | enum lttng_kernel_abi_instrumentation itype) |
dffef45d | 1161 | { |
a67ba386 MD |
1162 | struct lttng_kernel_event_notifier *event_notifier; |
1163 | struct lttng_kernel_event_notifier_private *event_notifier_priv; | |
ab04d7b1 | 1164 | struct lttng_counter *error_counter; |
dffef45d FD |
1165 | const char *event_name; |
1166 | struct hlist_head *head; | |
1167 | int ret; | |
1168 | ||
1169 | switch (itype) { | |
606828e4 | 1170 | case LTTNG_KERNEL_ABI_TRACEPOINT: |
437d5aa5 | 1171 | event_name = event_desc->event_name; |
b01155ba | 1172 | break; |
b4a75708 | 1173 | |
c190d76e MJ |
1174 | case LTTNG_KERNEL_ABI_KPROBE: |
1175 | lttng_fallthrough; | |
1176 | case LTTNG_KERNEL_ABI_UPROBE: | |
1177 | lttng_fallthrough; | |
606828e4 | 1178 | case LTTNG_KERNEL_ABI_SYSCALL: |
2b16f0c9 FD |
1179 | event_name = event_notifier_param->event.name; |
1180 | break; | |
b4a75708 | 1181 | |
c190d76e MJ |
1182 | case LTTNG_KERNEL_ABI_KRETPROBE: |
1183 | lttng_fallthrough; | |
1184 | case LTTNG_KERNEL_ABI_FUNCTION: | |
1185 | lttng_fallthrough; | |
1186 | case LTTNG_KERNEL_ABI_NOOP: | |
1187 | lttng_fallthrough; | |
dffef45d FD |
1188 | default: |
1189 | WARN_ON_ONCE(1); | |
1190 | ret = -EINVAL; | |
1191 | goto type_error; | |
1192 | } | |
1193 | ||
1194 | head = utils_borrow_hash_table_bucket(event_notifier_group->event_notifiers_ht.table, | |
1195 | LTTNG_EVENT_NOTIFIER_HT_SIZE, event_name); | |
a67ba386 MD |
1196 | lttng_hlist_for_each_entry(event_notifier_priv, head, hlist) { |
1197 | WARN_ON_ONCE(!event_notifier_priv->parent.desc); | |
1198 | if (!strncmp(event_notifier_priv->parent.desc->event_name, event_name, | |
606828e4 | 1199 | LTTNG_KERNEL_ABI_SYM_NAME_LEN - 1) |
a67ba386 MD |
1200 | && event_notifier_group == event_notifier_priv->group |
1201 | && token == event_notifier_priv->parent.user_token) { | |
dffef45d FD |
1202 | ret = -EEXIST; |
1203 | goto exist; | |
1204 | } | |
1205 | } | |
1206 | ||
1207 | event_notifier = kmem_cache_zalloc(event_notifier_cache, GFP_KERNEL); | |
1208 | if (!event_notifier) { | |
1209 | ret = -ENOMEM; | |
1210 | goto cache_error; | |
1211 | } | |
a67ba386 MD |
1212 | event_notifier_priv = kmem_cache_zalloc(event_notifier_private_cache, GFP_KERNEL); |
1213 | if (!event_notifier_priv) { | |
1214 | ret = -ENOMEM; | |
1215 | goto cache_private_error; | |
1216 | } | |
1217 | event_notifier_priv->pub = event_notifier; | |
1218 | event_notifier_priv->parent.pub = &event_notifier->parent; | |
1219 | event_notifier->priv = event_notifier_priv; | |
1220 | event_notifier->parent.priv = &event_notifier_priv->parent; | |
1221 | event_notifier->parent.type = LTTNG_KERNEL_EVENT_TYPE_NOTIFIER; | |
1222 | ||
1223 | event_notifier->priv->group = event_notifier_group; | |
1224 | event_notifier->priv->parent.user_token = token; | |
1225 | event_notifier->priv->error_counter_index = error_counter_index; | |
1226 | event_notifier->priv->num_captures = 0; | |
1227 | event_notifier->priv->parent.instrumentation = itype; | |
1228 | event_notifier->notification_send = lttng_event_notifier_notification_send; | |
1229 | INIT_LIST_HEAD(&event_notifier->priv->parent.filter_bytecode_runtime_head); | |
1230 | INIT_LIST_HEAD(&event_notifier->priv->parent.enablers_ref_head); | |
1231 | INIT_LIST_HEAD(&event_notifier->priv->capture_bytecode_runtime_head); | |
8a445457 | 1232 | event_notifier->parent.run_filter = lttng_kernel_interpret_event_filter; |
dffef45d FD |
1233 | |
1234 | switch (itype) { | |
606828e4 | 1235 | case LTTNG_KERNEL_ABI_TRACEPOINT: |
dffef45d | 1236 | /* Event will be enabled by enabler sync. */ |
a67ba386 MD |
1237 | event_notifier->parent.enabled = 0; |
1238 | event_notifier->priv->parent.registered = 0; | |
1239 | event_notifier->priv->parent.desc = lttng_event_desc_get(event_name); | |
1240 | if (!event_notifier->priv->parent.desc) { | |
dffef45d FD |
1241 | ret = -ENOENT; |
1242 | goto register_error; | |
1243 | } | |
1244 | /* Populate lttng_event_notifier structure before event registration. */ | |
1245 | smp_wmb(); | |
1246 | break; | |
b4a75708 | 1247 | |
606828e4 | 1248 | case LTTNG_KERNEL_ABI_KPROBE: |
2b16f0c9 FD |
1249 | /* |
1250 | * Needs to be explicitly enabled after creation, since | |
1251 | * we may want to apply filters. | |
1252 | */ | |
a67ba386 MD |
1253 | event_notifier->parent.enabled = 0; |
1254 | event_notifier->priv->parent.registered = 1; | |
2b16f0c9 FD |
1255 | /* |
1256 | * Populate lttng_event_notifier structure before event | |
1257 | * registration. | |
1258 | */ | |
1259 | smp_wmb(); | |
6a35e5bd | 1260 | ret = lttng_kprobes_register_event(event_notifier_param->event.u.kprobe.symbol_name, |
2b16f0c9 FD |
1261 | event_notifier_param->event.u.kprobe.symbol_name, |
1262 | event_notifier_param->event.u.kprobe.offset, | |
1263 | event_notifier_param->event.u.kprobe.addr, | |
6a35e5bd | 1264 | &event_notifier->parent); |
2b16f0c9 FD |
1265 | if (ret) { |
1266 | ret = -EINVAL; | |
1267 | goto register_error; | |
1268 | } | |
a67ba386 | 1269 | ret = try_module_get(event_notifier->priv->parent.desc->owner); |
2b16f0c9 FD |
1270 | WARN_ON_ONCE(!ret); |
1271 | break; | |
b4a75708 | 1272 | |
606828e4 | 1273 | case LTTNG_KERNEL_ABI_SYSCALL: |
8a8ac9a8 FD |
1274 | /* |
1275 | * Needs to be explicitly enabled after creation, since | |
1276 | * we may want to apply filters. | |
1277 | */ | |
a67ba386 MD |
1278 | event_notifier->parent.enabled = 0; |
1279 | event_notifier->priv->parent.registered = 0; | |
1280 | event_notifier->priv->parent.desc = event_desc; | |
8a8ac9a8 | 1281 | switch (event_notifier_param->event.u.syscall.entryexit) { |
606828e4 | 1282 | case LTTNG_KERNEL_ABI_SYSCALL_ENTRYEXIT: |
8a8ac9a8 FD |
1283 | ret = -EINVAL; |
1284 | goto register_error; | |
606828e4 | 1285 | case LTTNG_KERNEL_ABI_SYSCALL_ENTRY: |
a67ba386 | 1286 | event_notifier->priv->parent.u.syscall.entryexit = LTTNG_SYSCALL_ENTRY; |
8a8ac9a8 | 1287 | break; |
606828e4 | 1288 | case LTTNG_KERNEL_ABI_SYSCALL_EXIT: |
a67ba386 | 1289 | event_notifier->priv->parent.u.syscall.entryexit = LTTNG_SYSCALL_EXIT; |
8a8ac9a8 FD |
1290 | break; |
1291 | } | |
1292 | switch (event_notifier_param->event.u.syscall.abi) { | |
606828e4 | 1293 | case LTTNG_KERNEL_ABI_SYSCALL_ABI_ALL: |
8a8ac9a8 FD |
1294 | ret = -EINVAL; |
1295 | goto register_error; | |
606828e4 | 1296 | case LTTNG_KERNEL_ABI_SYSCALL_ABI_NATIVE: |
a67ba386 | 1297 | event_notifier->priv->parent.u.syscall.abi = LTTNG_SYSCALL_ABI_NATIVE; |
8a8ac9a8 | 1298 | break; |
606828e4 | 1299 | case LTTNG_KERNEL_ABI_SYSCALL_ABI_COMPAT: |
a67ba386 | 1300 | event_notifier->priv->parent.u.syscall.abi = LTTNG_SYSCALL_ABI_COMPAT; |
8a8ac9a8 FD |
1301 | break; |
1302 | } | |
1303 | ||
a67ba386 | 1304 | if (!event_notifier->priv->parent.desc) { |
8a8ac9a8 FD |
1305 | ret = -EINVAL; |
1306 | goto register_error; | |
1307 | } | |
1308 | break; | |
b4a75708 | 1309 | |
606828e4 | 1310 | case LTTNG_KERNEL_ABI_UPROBE: |
9de67196 FD |
1311 | /* |
1312 | * Needs to be explicitly enabled after creation, since | |
1313 | * we may want to apply filters. | |
1314 | */ | |
a67ba386 MD |
1315 | event_notifier->parent.enabled = 0; |
1316 | event_notifier->priv->parent.registered = 1; | |
9de67196 FD |
1317 | |
1318 | /* | |
1319 | * Populate lttng_event_notifier structure before | |
1320 | * event_notifier registration. | |
1321 | */ | |
1322 | smp_wmb(); | |
1323 | ||
17806c46 | 1324 | ret = lttng_uprobes_register_event(event_notifier_param->event.name, |
9de67196 | 1325 | event_notifier_param->event.u.uprobe.fd, |
17806c46 | 1326 | &event_notifier->parent); |
9de67196 FD |
1327 | if (ret) |
1328 | goto register_error; | |
a67ba386 | 1329 | ret = try_module_get(event_notifier->priv->parent.desc->owner); |
9de67196 FD |
1330 | WARN_ON_ONCE(!ret); |
1331 | break; | |
b4a75708 | 1332 | |
c190d76e MJ |
1333 | case LTTNG_KERNEL_ABI_KRETPROBE: |
1334 | lttng_fallthrough; | |
1335 | case LTTNG_KERNEL_ABI_FUNCTION: | |
1336 | lttng_fallthrough; | |
1337 | case LTTNG_KERNEL_ABI_NOOP: | |
1338 | lttng_fallthrough; | |
dffef45d FD |
1339 | default: |
1340 | WARN_ON_ONCE(1); | |
1341 | ret = -EINVAL; | |
1342 | goto register_error; | |
1343 | } | |
1344 | ||
a67ba386 MD |
1345 | list_add(&event_notifier->priv->node, &event_notifier_group->event_notifiers_head); |
1346 | hlist_add_head(&event_notifier->priv->hlist, head); | |
99f52fcc FD |
1347 | |
1348 | /* | |
1349 | * Clear the error counter bucket. The sessiond keeps track of which | |
ab04d7b1 MD |
1350 | * bucket is currently in use. We trust it. The session lock |
1351 | * synchronizes against concurrent creation of the error | |
1352 | * counter. | |
99f52fcc | 1353 | */ |
ab04d7b1 MD |
1354 | error_counter = event_notifier_group->error_counter; |
1355 | if (error_counter) { | |
99f52fcc FD |
1356 | size_t dimension_index[1]; |
1357 | ||
1358 | /* | |
1359 | * Check that the index is within the boundary of the counter. | |
1360 | */ | |
a67ba386 | 1361 | if (event_notifier->priv->error_counter_index >= event_notifier_group->error_counter_len) { |
99f52fcc | 1362 | printk(KERN_INFO "LTTng: event_notifier: Error counter index out-of-bound: counter-len=%zu, index=%llu\n", |
a67ba386 | 1363 | event_notifier_group->error_counter_len, event_notifier->priv->error_counter_index); |
99f52fcc FD |
1364 | ret = -EINVAL; |
1365 | goto register_error; | |
1366 | } | |
1367 | ||
a67ba386 | 1368 | dimension_index[0] = event_notifier->priv->error_counter_index; |
ab04d7b1 | 1369 | ret = error_counter->ops->counter_clear(error_counter->counter, dimension_index); |
99f52fcc FD |
1370 | if (ret) { |
1371 | printk(KERN_INFO "LTTng: event_notifier: Unable to clear error counter bucket %llu\n", | |
a67ba386 | 1372 | event_notifier->priv->error_counter_index); |
99f52fcc FD |
1373 | goto register_error; |
1374 | } | |
1375 | } | |
1376 | ||
dffef45d FD |
1377 | return event_notifier; |
1378 | ||
1379 | register_error: | |
a67ba386 MD |
1380 | kmem_cache_free(event_notifier_private_cache, event_notifier_priv); |
1381 | cache_private_error: | |
dffef45d FD |
1382 | kmem_cache_free(event_notifier_cache, event_notifier); |
1383 | cache_error: | |
1384 | exist: | |
1385 | type_error: | |
1386 | return ERR_PTR(ret); | |
1387 | } | |
1388 | ||
99f52fcc FD |
1389 | int lttng_kernel_counter_read(struct lttng_counter *counter, |
1390 | const size_t *dim_indexes, int32_t cpu, | |
1391 | int64_t *val, bool *overflow, bool *underflow) | |
1392 | { | |
1393 | return counter->ops->counter_read(counter->counter, dim_indexes, | |
1394 | cpu, val, overflow, underflow); | |
1395 | } | |
1396 | ||
1397 | int lttng_kernel_counter_aggregate(struct lttng_counter *counter, | |
1398 | const size_t *dim_indexes, int64_t *val, | |
1399 | bool *overflow, bool *underflow) | |
1400 | { | |
1401 | return counter->ops->counter_aggregate(counter->counter, dim_indexes, | |
1402 | val, overflow, underflow); | |
1403 | } | |
1404 | ||
1405 | int lttng_kernel_counter_clear(struct lttng_counter *counter, | |
1406 | const size_t *dim_indexes) | |
1407 | { | |
1408 | return counter->ops->counter_clear(counter->counter, dim_indexes); | |
1409 | } | |
1410 | ||
1ae083ba | 1411 | struct lttng_kernel_event_recorder *lttng_kernel_event_recorder_create(struct lttng_event_recorder_enabler *event_enabler, |
def1e304 | 1412 | const struct lttng_kernel_event_desc *event_desc) |
3c997079 | 1413 | { |
a67ba386 | 1414 | struct lttng_kernel_event_recorder *event; |
3c997079 MD |
1415 | |
1416 | mutex_lock(&sessions_mutex); | |
def1e304 | 1417 | event = _lttng_kernel_event_recorder_create(event_enabler, event_desc); |
3c997079 MD |
1418 | mutex_unlock(&sessions_mutex); |
1419 | return event; | |
1420 | } | |
1421 | ||
a67ba386 | 1422 | struct lttng_kernel_event_notifier *lttng_event_notifier_create( |
437d5aa5 | 1423 | const struct lttng_kernel_event_desc *event_desc, |
99f52fcc FD |
1424 | uint64_t id, uint64_t error_counter_index, |
1425 | struct lttng_event_notifier_group *event_notifier_group, | |
606828e4 | 1426 | struct lttng_kernel_abi_event_notifier *event_notifier_param, |
a67ba386 | 1427 | enum lttng_kernel_abi_instrumentation itype) |
dffef45d | 1428 | { |
a67ba386 | 1429 | struct lttng_kernel_event_notifier *event_notifier; |
dffef45d FD |
1430 | |
1431 | mutex_lock(&sessions_mutex); | |
1432 | event_notifier = _lttng_event_notifier_create(event_desc, id, | |
99f52fcc | 1433 | error_counter_index, event_notifier_group, |
a67ba386 | 1434 | event_notifier_param, itype); |
dffef45d FD |
1435 | mutex_unlock(&sessions_mutex); |
1436 | return event_notifier; | |
1437 | } | |
1438 | ||
3c997079 MD |
1439 | /* Only used for tracepoints for now. */ |
1440 | static | |
96c59af1 | 1441 | void register_event_recorder(struct lttng_kernel_event_recorder *event_recorder) |
3c997079 | 1442 | { |
437d5aa5 | 1443 | const struct lttng_kernel_event_desc *desc; |
f127e61e | 1444 | int ret = -EINVAL; |
3c997079 | 1445 | |
a67ba386 | 1446 | if (event_recorder->priv->parent.registered) |
3c997079 | 1447 | return; |
4ecb5ad5 | 1448 | |
a67ba386 MD |
1449 | desc = event_recorder->priv->parent.desc; |
1450 | switch (event_recorder->priv->parent.instrumentation) { | |
606828e4 | 1451 | case LTTNG_KERNEL_ABI_TRACEPOINT: |
437d5aa5 | 1452 | ret = lttng_wrapper_tracepoint_probe_register(desc->event_kname, |
6c8c025b | 1453 | desc->tp_class->probe_callback, |
14a15bad | 1454 | &event_recorder->parent); |
4ecb5ad5 | 1455 | break; |
b4a75708 | 1456 | |
606828e4 | 1457 | case LTTNG_KERNEL_ABI_SYSCALL: |
9b2f1c54 | 1458 | ret = lttng_syscall_filter_enable_event(&event_recorder->parent); |
4ecb5ad5 | 1459 | break; |
b4a75708 | 1460 | |
c190d76e MJ |
1461 | case LTTNG_KERNEL_ABI_KPROBE: |
1462 | lttng_fallthrough; | |
1463 | case LTTNG_KERNEL_ABI_UPROBE: | |
1464 | lttng_fallthrough; | |
606828e4 | 1465 | case LTTNG_KERNEL_ABI_KRETPROBE: |
4ecb5ad5 MD |
1466 | ret = 0; |
1467 | break; | |
b4a75708 | 1468 | |
c190d76e MJ |
1469 | case LTTNG_KERNEL_ABI_FUNCTION: |
1470 | lttng_fallthrough; | |
1471 | case LTTNG_KERNEL_ABI_NOOP: | |
1472 | lttng_fallthrough; | |
4ecb5ad5 MD |
1473 | default: |
1474 | WARN_ON_ONCE(1); | |
1475 | } | |
3c997079 | 1476 | if (!ret) |
a67ba386 | 1477 | event_recorder->priv->parent.registered = 1; |
3c997079 MD |
1478 | } |
1479 | ||
4e3c1b9b MD |
1480 | /* |
1481 | * Only used internally at session destruction. | |
1482 | */ | |
96c59af1 | 1483 | int _lttng_event_recorder_unregister(struct lttng_kernel_event_recorder *event_recorder) |
4e3c1b9b | 1484 | { |
a67ba386 | 1485 | struct lttng_kernel_event_common_private *event_priv = &event_recorder->priv->parent; |
437d5aa5 | 1486 | const struct lttng_kernel_event_desc *desc; |
11b5a3c2 MD |
1487 | int ret = -EINVAL; |
1488 | ||
a67ba386 | 1489 | if (!event_priv->registered) |
3c997079 MD |
1490 | return 0; |
1491 | ||
a67ba386 MD |
1492 | desc = event_priv->desc; |
1493 | switch (event_priv->instrumentation) { | |
606828e4 | 1494 | case LTTNG_KERNEL_ABI_TRACEPOINT: |
a67ba386 | 1495 | ret = lttng_wrapper_tracepoint_probe_unregister(event_priv->desc->event_kname, |
6c8c025b | 1496 | event_priv->desc->tp_class->probe_callback, |
14a15bad | 1497 | &event_recorder->parent); |
baf20995 | 1498 | break; |
b4a75708 | 1499 | |
606828e4 | 1500 | case LTTNG_KERNEL_ABI_KPROBE: |
6a35e5bd | 1501 | lttng_kprobes_unregister_event(&event_recorder->parent); |
d6d808f3 MD |
1502 | ret = 0; |
1503 | break; | |
b4a75708 | 1504 | |
606828e4 | 1505 | case LTTNG_KERNEL_ABI_KRETPROBE: |
eb6b47db | 1506 | lttng_kretprobes_unregister(&event_recorder->parent); |
7371f44c MD |
1507 | ret = 0; |
1508 | break; | |
b4a75708 | 1509 | |
606828e4 | 1510 | case LTTNG_KERNEL_ABI_SYSCALL: |
9b2f1c54 | 1511 | ret = lttng_syscall_filter_disable_event(&event_recorder->parent); |
4ecb5ad5 | 1512 | break; |
b4a75708 | 1513 | |
606828e4 | 1514 | case LTTNG_KERNEL_ABI_NOOP: |
259b6cb3 MD |
1515 | ret = 0; |
1516 | break; | |
b4a75708 | 1517 | |
606828e4 | 1518 | case LTTNG_KERNEL_ABI_UPROBE: |
17806c46 | 1519 | lttng_uprobes_unregister_event(&event_recorder->parent); |
149b9a9d YB |
1520 | ret = 0; |
1521 | break; | |
b4a75708 | 1522 | |
c190d76e MJ |
1523 | case LTTNG_KERNEL_ABI_FUNCTION: |
1524 | lttng_fallthrough; | |
baf20995 MD |
1525 | default: |
1526 | WARN_ON_ONCE(1); | |
1527 | } | |
3c997079 | 1528 | if (!ret) |
a67ba386 | 1529 | event_priv->registered = 0; |
dda6a249 MD |
1530 | return ret; |
1531 | } | |
1532 | ||
dffef45d FD |
1533 | /* Only used for tracepoints for now. */ |
1534 | static | |
a67ba386 | 1535 | void register_event_notifier(struct lttng_kernel_event_notifier *event_notifier) |
dffef45d | 1536 | { |
437d5aa5 | 1537 | const struct lttng_kernel_event_desc *desc; |
dffef45d FD |
1538 | int ret = -EINVAL; |
1539 | ||
a67ba386 | 1540 | if (event_notifier->priv->parent.registered) |
dffef45d FD |
1541 | return; |
1542 | ||
a67ba386 MD |
1543 | desc = event_notifier->priv->parent.desc; |
1544 | switch (event_notifier->priv->parent.instrumentation) { | |
606828e4 | 1545 | case LTTNG_KERNEL_ABI_TRACEPOINT: |
437d5aa5 | 1546 | ret = lttng_wrapper_tracepoint_probe_register(desc->event_kname, |
6c8c025b | 1547 | desc->tp_class->probe_callback, |
14a15bad | 1548 | &event_notifier->parent); |
b01155ba | 1549 | break; |
b4a75708 | 1550 | |
606828e4 | 1551 | case LTTNG_KERNEL_ABI_SYSCALL: |
9b2f1c54 | 1552 | ret = lttng_syscall_filter_enable_event(&event_notifier->parent); |
8a8ac9a8 | 1553 | break; |
b4a75708 | 1554 | |
c190d76e MJ |
1555 | case LTTNG_KERNEL_ABI_KPROBE: |
1556 | lttng_fallthrough; | |
606828e4 | 1557 | case LTTNG_KERNEL_ABI_UPROBE: |
2b16f0c9 FD |
1558 | ret = 0; |
1559 | break; | |
b4a75708 | 1560 | |
c190d76e MJ |
1561 | case LTTNG_KERNEL_ABI_KRETPROBE: |
1562 | lttng_fallthrough; | |
1563 | case LTTNG_KERNEL_ABI_FUNCTION: | |
1564 | lttng_fallthrough; | |
1565 | case LTTNG_KERNEL_ABI_NOOP: | |
1566 | lttng_fallthrough; | |
dffef45d FD |
1567 | default: |
1568 | WARN_ON_ONCE(1); | |
1569 | } | |
1570 | if (!ret) | |
a67ba386 | 1571 | event_notifier->priv->parent.registered = 1; |
dffef45d FD |
1572 | } |
1573 | ||
1574 | static | |
1575 | int _lttng_event_notifier_unregister( | |
a67ba386 | 1576 | struct lttng_kernel_event_notifier *event_notifier) |
dffef45d | 1577 | { |
437d5aa5 | 1578 | const struct lttng_kernel_event_desc *desc; |
dffef45d FD |
1579 | int ret = -EINVAL; |
1580 | ||
a67ba386 | 1581 | if (!event_notifier->priv->parent.registered) |
dffef45d FD |
1582 | return 0; |
1583 | ||
a67ba386 MD |
1584 | desc = event_notifier->priv->parent.desc; |
1585 | switch (event_notifier->priv->parent.instrumentation) { | |
606828e4 | 1586 | case LTTNG_KERNEL_ABI_TRACEPOINT: |
a67ba386 | 1587 | ret = lttng_wrapper_tracepoint_probe_unregister(event_notifier->priv->parent.desc->event_kname, |
6c8c025b | 1588 | event_notifier->priv->parent.desc->tp_class->probe_callback, |
14a15bad | 1589 | &event_notifier->parent); |
b01155ba | 1590 | break; |
b4a75708 | 1591 | |
606828e4 | 1592 | case LTTNG_KERNEL_ABI_KPROBE: |
6a35e5bd | 1593 | lttng_kprobes_unregister_event(&event_notifier->parent); |
2b16f0c9 FD |
1594 | ret = 0; |
1595 | break; | |
b4a75708 | 1596 | |
606828e4 | 1597 | case LTTNG_KERNEL_ABI_UPROBE: |
17806c46 | 1598 | lttng_uprobes_unregister_event(&event_notifier->parent); |
9de67196 FD |
1599 | ret = 0; |
1600 | break; | |
b4a75708 | 1601 | |
606828e4 | 1602 | case LTTNG_KERNEL_ABI_SYSCALL: |
9b2f1c54 | 1603 | ret = lttng_syscall_filter_disable_event(&event_notifier->parent); |
8a8ac9a8 | 1604 | break; |
b4a75708 | 1605 | |
c190d76e MJ |
1606 | case LTTNG_KERNEL_ABI_KRETPROBE: |
1607 | lttng_fallthrough; | |
1608 | case LTTNG_KERNEL_ABI_FUNCTION: | |
1609 | lttng_fallthrough; | |
1610 | case LTTNG_KERNEL_ABI_NOOP: | |
1611 | lttng_fallthrough; | |
dffef45d FD |
1612 | default: |
1613 | WARN_ON_ONCE(1); | |
1614 | } | |
1615 | if (!ret) | |
a67ba386 | 1616 | event_notifier->priv->parent.registered = 0; |
dffef45d FD |
1617 | return ret; |
1618 | } | |
1619 | ||
dda6a249 MD |
1620 | /* |
1621 | * Only used internally at session destruction. | |
1622 | */ | |
be066e6c | 1623 | static |
0648898e | 1624 | void _lttng_event_destroy(struct lttng_kernel_event_common *event) |
dda6a249 | 1625 | { |
0648898e | 1626 | struct lttng_kernel_event_common_private *event_priv = event->priv; |
966ad253 MD |
1627 | struct lttng_enabler_ref *enabler_ref, *tmp_enabler_ref; |
1628 | ||
0648898e MD |
1629 | lttng_free_event_filter_runtime(event); |
1630 | /* Free event enabler refs */ | |
1631 | list_for_each_entry_safe(enabler_ref, tmp_enabler_ref, | |
1632 | &event_priv->enablers_ref_head, node) | |
1633 | kfree(enabler_ref); | |
b4a75708 | 1634 | |
0648898e MD |
1635 | switch (event->type) { |
1636 | case LTTNG_KERNEL_EVENT_TYPE_RECORDER: | |
1637 | { | |
1638 | struct lttng_kernel_event_recorder *event_recorder = | |
1639 | container_of(event, struct lttng_kernel_event_recorder, parent); | |
b4a75708 | 1640 | |
0648898e MD |
1641 | switch (event_priv->instrumentation) { |
1642 | case LTTNG_KERNEL_ABI_TRACEPOINT: | |
1643 | lttng_event_desc_put(event_priv->desc); | |
1644 | break; | |
b4a75708 | 1645 | |
0648898e MD |
1646 | case LTTNG_KERNEL_ABI_KPROBE: |
1647 | module_put(event_priv->desc->owner); | |
6a35e5bd | 1648 | lttng_kprobes_destroy_event_private(&event_recorder->parent); |
0648898e | 1649 | break; |
b4a75708 | 1650 | |
0648898e MD |
1651 | case LTTNG_KERNEL_ABI_KRETPROBE: |
1652 | module_put(event_priv->desc->owner); | |
eb6b47db | 1653 | lttng_kretprobes_destroy_private(&event_recorder->parent); |
0648898e | 1654 | break; |
b4a75708 | 1655 | |
0648898e MD |
1656 | case LTTNG_KERNEL_ABI_SYSCALL: |
1657 | break; | |
4e3c1b9b | 1658 | |
0648898e MD |
1659 | case LTTNG_KERNEL_ABI_UPROBE: |
1660 | module_put(event_priv->desc->owner); | |
17806c46 | 1661 | lttng_uprobes_destroy_event_private(&event_recorder->parent); |
0648898e | 1662 | break; |
3ef5cc03 | 1663 | |
c190d76e MJ |
1664 | case LTTNG_KERNEL_ABI_FUNCTION: |
1665 | lttng_fallthrough; | |
1666 | case LTTNG_KERNEL_ABI_NOOP: | |
1667 | lttng_fallthrough; | |
0648898e MD |
1668 | default: |
1669 | WARN_ON_ONCE(1); | |
1670 | } | |
1671 | list_del(&event_recorder->priv->node); | |
1672 | kmem_cache_free(event_recorder_private_cache, event_recorder->priv); | |
1673 | kmem_cache_free(event_recorder_cache, event_recorder); | |
b01155ba | 1674 | break; |
0648898e MD |
1675 | } |
1676 | case LTTNG_KERNEL_EVENT_TYPE_NOTIFIER: | |
1677 | { | |
1678 | struct lttng_kernel_event_notifier *event_notifier = | |
1679 | container_of(event, struct lttng_kernel_event_notifier, parent); | |
b4a75708 | 1680 | |
0648898e MD |
1681 | switch (event_notifier->priv->parent.instrumentation) { |
1682 | case LTTNG_KERNEL_ABI_TRACEPOINT: | |
1683 | lttng_event_desc_put(event_notifier->priv->parent.desc); | |
1684 | break; | |
b4a75708 | 1685 | |
0648898e MD |
1686 | case LTTNG_KERNEL_ABI_KPROBE: |
1687 | module_put(event_notifier->priv->parent.desc->owner); | |
6a35e5bd | 1688 | lttng_kprobes_destroy_event_private(&event_notifier->parent); |
0648898e | 1689 | break; |
b4a75708 | 1690 | |
0648898e MD |
1691 | case LTTNG_KERNEL_ABI_SYSCALL: |
1692 | break; | |
b4a75708 | 1693 | |
0648898e MD |
1694 | case LTTNG_KERNEL_ABI_UPROBE: |
1695 | module_put(event_notifier->priv->parent.desc->owner); | |
17806c46 | 1696 | lttng_uprobes_destroy_event_private(&event_notifier->parent); |
0648898e MD |
1697 | break; |
1698 | ||
c190d76e MJ |
1699 | case LTTNG_KERNEL_ABI_KRETPROBE: |
1700 | lttng_fallthrough; | |
1701 | case LTTNG_KERNEL_ABI_FUNCTION: | |
1702 | lttng_fallthrough; | |
1703 | case LTTNG_KERNEL_ABI_NOOP: | |
1704 | lttng_fallthrough; | |
0648898e MD |
1705 | default: |
1706 | WARN_ON_ONCE(1); | |
1707 | } | |
1708 | list_del(&event_notifier->priv->node); | |
1709 | kmem_cache_free(event_notifier_private_cache, event_notifier->priv); | |
1710 | kmem_cache_free(event_notifier_cache, event_notifier); | |
1711 | break; | |
1712 | } | |
dffef45d FD |
1713 | default: |
1714 | WARN_ON_ONCE(1); | |
1715 | } | |
dffef45d FD |
1716 | } |
1717 | ||
8c0393c3 | 1718 | struct lttng_kernel_id_tracker *get_tracker(struct lttng_kernel_session *session, |
d1f652f8 | 1719 | enum tracker_type tracker_type) |
e0130fab | 1720 | { |
d1f652f8 MD |
1721 | switch (tracker_type) { |
1722 | case TRACKER_PID: | |
1723 | return &session->pid_tracker; | |
1724 | case TRACKER_VPID: | |
1725 | return &session->vpid_tracker; | |
1726 | case TRACKER_UID: | |
1727 | return &session->uid_tracker; | |
1728 | case TRACKER_VUID: | |
1729 | return &session->vuid_tracker; | |
1730 | case TRACKER_GID: | |
1731 | return &session->gid_tracker; | |
1732 | case TRACKER_VGID: | |
1733 | return &session->vgid_tracker; | |
1734 | default: | |
1735 | WARN_ON_ONCE(1); | |
1736 | return NULL; | |
1737 | } | |
1738 | } | |
1739 | ||
8cdc1a81 | 1740 | int lttng_session_track_id(struct lttng_kernel_session *session, |
d1f652f8 MD |
1741 | enum tracker_type tracker_type, int id) |
1742 | { | |
8c0393c3 | 1743 | struct lttng_kernel_id_tracker *tracker; |
e0130fab MD |
1744 | int ret; |
1745 | ||
d1f652f8 MD |
1746 | tracker = get_tracker(session, tracker_type); |
1747 | if (!tracker) | |
1748 | return -EINVAL; | |
1749 | if (id < -1) | |
e0130fab MD |
1750 | return -EINVAL; |
1751 | mutex_lock(&sessions_mutex); | |
d1f652f8 MD |
1752 | if (id == -1) { |
1753 | /* track all ids: destroy tracker. */ | |
1754 | lttng_id_tracker_destroy(tracker, true); | |
e0130fab MD |
1755 | ret = 0; |
1756 | } else { | |
d1f652f8 | 1757 | ret = lttng_id_tracker_add(tracker, id); |
e0130fab | 1758 | } |
e0130fab MD |
1759 | mutex_unlock(&sessions_mutex); |
1760 | return ret; | |
1761 | } | |
1762 | ||
8cdc1a81 | 1763 | int lttng_session_untrack_id(struct lttng_kernel_session *session, |
d1f652f8 | 1764 | enum tracker_type tracker_type, int id) |
e0130fab | 1765 | { |
8c0393c3 | 1766 | struct lttng_kernel_id_tracker *tracker; |
e0130fab MD |
1767 | int ret; |
1768 | ||
d1f652f8 MD |
1769 | tracker = get_tracker(session, tracker_type); |
1770 | if (!tracker) | |
1771 | return -EINVAL; | |
1772 | if (id < -1) | |
e0130fab MD |
1773 | return -EINVAL; |
1774 | mutex_lock(&sessions_mutex); | |
d1f652f8 MD |
1775 | if (id == -1) { |
1776 | /* untrack all ids: replace by empty tracker. */ | |
1777 | ret = lttng_id_tracker_empty_set(tracker); | |
e0130fab | 1778 | } else { |
d1f652f8 | 1779 | ret = lttng_id_tracker_del(tracker, id); |
e0130fab | 1780 | } |
e0130fab MD |
1781 | mutex_unlock(&sessions_mutex); |
1782 | return ret; | |
1783 | } | |
1784 | ||
7e6f9ef6 | 1785 | static |
d1f652f8 | 1786 | void *id_list_start(struct seq_file *m, loff_t *pos) |
7e6f9ef6 | 1787 | { |
8c0393c3 MD |
1788 | struct lttng_kernel_id_tracker *id_tracker = m->private; |
1789 | struct lttng_kernel_id_tracker_rcu *id_tracker_p = id_tracker->p; | |
d1f652f8 | 1790 | struct lttng_id_hash_node *e; |
7e6f9ef6 MD |
1791 | int iter = 0, i; |
1792 | ||
1793 | mutex_lock(&sessions_mutex); | |
d1f652f8 MD |
1794 | if (id_tracker_p) { |
1795 | for (i = 0; i < LTTNG_ID_TABLE_SIZE; i++) { | |
1796 | struct hlist_head *head = &id_tracker_p->id_hash[i]; | |
7e6f9ef6 | 1797 | |
f934e302 | 1798 | lttng_hlist_for_each_entry(e, head, hlist) { |
7e6f9ef6 MD |
1799 | if (iter++ >= *pos) |
1800 | return e; | |
1801 | } | |
1802 | } | |
1803 | } else { | |
d1f652f8 | 1804 | /* ID tracker disabled. */ |
7e6f9ef6 | 1805 | if (iter >= *pos && iter == 0) { |
d1f652f8 | 1806 | return id_tracker_p; /* empty tracker */ |
7e6f9ef6 MD |
1807 | } |
1808 | iter++; | |
1809 | } | |
1810 | /* End of list */ | |
1811 | return NULL; | |
1812 | } | |
1813 | ||
1814 | /* Called with sessions_mutex held. */ | |
1815 | static | |
d1f652f8 | 1816 | void *id_list_next(struct seq_file *m, void *p, loff_t *ppos) |
7e6f9ef6 | 1817 | { |
8c0393c3 MD |
1818 | struct lttng_kernel_id_tracker *id_tracker = m->private; |
1819 | struct lttng_kernel_id_tracker_rcu *id_tracker_p = id_tracker->p; | |
d1f652f8 | 1820 | struct lttng_id_hash_node *e; |
7e6f9ef6 MD |
1821 | int iter = 0, i; |
1822 | ||
1823 | (*ppos)++; | |
d1f652f8 MD |
1824 | if (id_tracker_p) { |
1825 | for (i = 0; i < LTTNG_ID_TABLE_SIZE; i++) { | |
1826 | struct hlist_head *head = &id_tracker_p->id_hash[i]; | |
7e6f9ef6 | 1827 | |
f934e302 | 1828 | lttng_hlist_for_each_entry(e, head, hlist) { |
7e6f9ef6 MD |
1829 | if (iter++ >= *ppos) |
1830 | return e; | |
1831 | } | |
1832 | } | |
1833 | } else { | |
d1f652f8 | 1834 | /* ID tracker disabled. */ |
7e6f9ef6 | 1835 | if (iter >= *ppos && iter == 0) |
d1f652f8 | 1836 | return p; /* empty tracker */ |
7e6f9ef6 MD |
1837 | iter++; |
1838 | } | |
1839 | ||
1840 | /* End of list */ | |
1841 | return NULL; | |
1842 | } | |
1843 | ||
1844 | static | |
d1f652f8 | 1845 | void id_list_stop(struct seq_file *m, void *p) |
7e6f9ef6 MD |
1846 | { |
1847 | mutex_unlock(&sessions_mutex); | |
1848 | } | |
1849 | ||
1850 | static | |
d1f652f8 | 1851 | int id_list_show(struct seq_file *m, void *p) |
7e6f9ef6 | 1852 | { |
8c0393c3 MD |
1853 | struct lttng_kernel_id_tracker *id_tracker = m->private; |
1854 | struct lttng_kernel_id_tracker_rcu *id_tracker_p = id_tracker->p; | |
d1f652f8 | 1855 | int id; |
7e6f9ef6 | 1856 | |
d1f652f8 | 1857 | if (p == id_tracker_p) { |
7e6f9ef6 | 1858 | /* Tracker disabled. */ |
d1f652f8 | 1859 | id = -1; |
7e6f9ef6 | 1860 | } else { |
d1f652f8 | 1861 | const struct lttng_id_hash_node *e = p; |
7e6f9ef6 | 1862 | |
d1f652f8 MD |
1863 | id = lttng_id_tracker_get_node_id(e); |
1864 | } | |
8c0393c3 | 1865 | switch (id_tracker->priv->tracker_type) { |
d1f652f8 MD |
1866 | case TRACKER_PID: |
1867 | seq_printf(m, "process { pid = %d; };\n", id); | |
1868 | break; | |
1869 | case TRACKER_VPID: | |
1870 | seq_printf(m, "process { vpid = %d; };\n", id); | |
1871 | break; | |
1872 | case TRACKER_UID: | |
1873 | seq_printf(m, "user { uid = %d; };\n", id); | |
1874 | break; | |
1875 | case TRACKER_VUID: | |
1876 | seq_printf(m, "user { vuid = %d; };\n", id); | |
1877 | break; | |
1878 | case TRACKER_GID: | |
1879 | seq_printf(m, "group { gid = %d; };\n", id); | |
1880 | break; | |
1881 | case TRACKER_VGID: | |
1882 | seq_printf(m, "group { vgid = %d; };\n", id); | |
1883 | break; | |
1884 | default: | |
1885 | seq_printf(m, "UNKNOWN { field = %d };\n", id); | |
7e6f9ef6 | 1886 | } |
7e6f9ef6 MD |
1887 | return 0; |
1888 | } | |
1889 | ||
1890 | static | |
d1f652f8 MD |
1891 | const struct seq_operations lttng_tracker_ids_list_seq_ops = { |
1892 | .start = id_list_start, | |
1893 | .next = id_list_next, | |
1894 | .stop = id_list_stop, | |
1895 | .show = id_list_show, | |
7e6f9ef6 MD |
1896 | }; |
1897 | ||
1898 | static | |
d1f652f8 | 1899 | int lttng_tracker_ids_list_open(struct inode *inode, struct file *file) |
7e6f9ef6 | 1900 | { |
d1f652f8 | 1901 | return seq_open(file, <tng_tracker_ids_list_seq_ops); |
7e6f9ef6 MD |
1902 | } |
1903 | ||
1904 | static | |
d1f652f8 | 1905 | int lttng_tracker_ids_list_release(struct inode *inode, struct file *file) |
7e6f9ef6 MD |
1906 | { |
1907 | struct seq_file *m = file->private_data; | |
8c0393c3 | 1908 | struct lttng_kernel_id_tracker *id_tracker = m->private; |
7e6f9ef6 MD |
1909 | int ret; |
1910 | ||
d1f652f8 | 1911 | WARN_ON_ONCE(!id_tracker); |
7e6f9ef6 | 1912 | ret = seq_release(inode, file); |
d1f652f8 | 1913 | if (!ret) |
8c0393c3 | 1914 | fput(id_tracker->priv->session->priv->file); |
7e6f9ef6 MD |
1915 | return ret; |
1916 | } | |
1917 | ||
d1f652f8 | 1918 | const struct file_operations lttng_tracker_ids_list_fops = { |
7e6f9ef6 | 1919 | .owner = THIS_MODULE, |
d1f652f8 | 1920 | .open = lttng_tracker_ids_list_open, |
7e6f9ef6 MD |
1921 | .read = seq_read, |
1922 | .llseek = seq_lseek, | |
d1f652f8 | 1923 | .release = lttng_tracker_ids_list_release, |
7e6f9ef6 MD |
1924 | }; |
1925 | ||
8cdc1a81 | 1926 | int lttng_session_list_tracker_ids(struct lttng_kernel_session *session, |
d1f652f8 | 1927 | enum tracker_type tracker_type) |
7e6f9ef6 | 1928 | { |
d1f652f8 | 1929 | struct file *tracker_ids_list_file; |
7e6f9ef6 MD |
1930 | struct seq_file *m; |
1931 | int file_fd, ret; | |
1932 | ||
1933 | file_fd = lttng_get_unused_fd(); | |
1934 | if (file_fd < 0) { | |
1935 | ret = file_fd; | |
1936 | goto fd_error; | |
1937 | } | |
1938 | ||
d1f652f8 MD |
1939 | tracker_ids_list_file = anon_inode_getfile("[lttng_tracker_ids_list]", |
1940 | <tng_tracker_ids_list_fops, | |
7e6f9ef6 | 1941 | NULL, O_RDWR); |
d1f652f8 MD |
1942 | if (IS_ERR(tracker_ids_list_file)) { |
1943 | ret = PTR_ERR(tracker_ids_list_file); | |
7e6f9ef6 MD |
1944 | goto file_error; |
1945 | } | |
8cdc1a81 | 1946 | if (!atomic_long_add_unless(&session->priv->file->f_count, 1, LONG_MAX)) { |
98d7281c | 1947 | ret = -EOVERFLOW; |
9c1f4643 MD |
1948 | goto refcount_error; |
1949 | } | |
d1f652f8 | 1950 | ret = lttng_tracker_ids_list_fops.open(NULL, tracker_ids_list_file); |
7e6f9ef6 MD |
1951 | if (ret < 0) |
1952 | goto open_error; | |
d1f652f8 MD |
1953 | m = tracker_ids_list_file->private_data; |
1954 | ||
1955 | m->private = get_tracker(session, tracker_type); | |
1956 | BUG_ON(!m->private); | |
1957 | fd_install(file_fd, tracker_ids_list_file); | |
7e6f9ef6 MD |
1958 | |
1959 | return file_fd; | |
1960 | ||
1961 | open_error: | |
8cdc1a81 | 1962 | atomic_long_dec(&session->priv->file->f_count); |
9c1f4643 | 1963 | refcount_error: |
d1f652f8 | 1964 | fput(tracker_ids_list_file); |
7e6f9ef6 MD |
1965 | file_error: |
1966 | put_unused_fd(file_fd); | |
1967 | fd_error: | |
1968 | return ret; | |
1969 | } | |
1970 | ||
3c997079 MD |
1971 | /* |
1972 | * Enabler management. | |
1973 | */ | |
1974 | static | |
4993071a PP |
1975 | int lttng_match_enabler_star_glob(const char *desc_name, |
1976 | const char *pattern) | |
3c997079 | 1977 | { |
cbc19040 MD |
1978 | if (!strutils_star_glob_match(pattern, LTTNG_SIZE_MAX, |
1979 | desc_name, LTTNG_SIZE_MAX)) | |
3c997079 MD |
1980 | return 0; |
1981 | return 1; | |
1982 | } | |
1983 | ||
1984 | static | |
4ecb5ad5 MD |
1985 | int lttng_match_enabler_name(const char *desc_name, |
1986 | const char *name) | |
3c997079 | 1987 | { |
4ecb5ad5 | 1988 | if (strcmp(desc_name, name)) |
3c997079 MD |
1989 | return 0; |
1990 | return 1; | |
1991 | } | |
1992 | ||
437d5aa5 | 1993 | int lttng_desc_match_enabler(const struct lttng_kernel_event_desc *desc, |
8d554755 | 1994 | struct lttng_event_enabler_common *enabler) |
3c997079 | 1995 | { |
4ecb5ad5 | 1996 | const char *desc_name, *enabler_name; |
badfe9f5 | 1997 | bool compat = false, entry = false; |
4ecb5ad5 MD |
1998 | |
1999 | enabler_name = enabler->event_param.name; | |
2000 | switch (enabler->event_param.instrumentation) { | |
606828e4 | 2001 | case LTTNG_KERNEL_ABI_TRACEPOINT: |
437d5aa5 | 2002 | desc_name = desc->event_name; |
3b861b22 FD |
2003 | switch (enabler->format_type) { |
2004 | case LTTNG_ENABLER_FORMAT_STAR_GLOB: | |
badfe9f5 | 2005 | return lttng_match_enabler_star_glob(desc_name, enabler_name); |
3b861b22 | 2006 | case LTTNG_ENABLER_FORMAT_NAME: |
badfe9f5 MD |
2007 | return lttng_match_enabler_name(desc_name, enabler_name); |
2008 | default: | |
2009 | return -EINVAL; | |
2010 | } | |
4ecb5ad5 | 2011 | break; |
b4a75708 | 2012 | |
606828e4 | 2013 | case LTTNG_KERNEL_ABI_SYSCALL: |
437d5aa5 | 2014 | desc_name = desc->event_name; |
badfe9f5 | 2015 | if (!strncmp(desc_name, "compat_", strlen("compat_"))) { |
4ecb5ad5 | 2016 | desc_name += strlen("compat_"); |
badfe9f5 MD |
2017 | compat = true; |
2018 | } | |
4ecb5ad5 MD |
2019 | if (!strncmp(desc_name, "syscall_exit_", |
2020 | strlen("syscall_exit_"))) { | |
2021 | desc_name += strlen("syscall_exit_"); | |
2022 | } else if (!strncmp(desc_name, "syscall_entry_", | |
2023 | strlen("syscall_entry_"))) { | |
2024 | desc_name += strlen("syscall_entry_"); | |
badfe9f5 | 2025 | entry = true; |
4ecb5ad5 MD |
2026 | } else { |
2027 | WARN_ON_ONCE(1); | |
2028 | return -EINVAL; | |
2029 | } | |
badfe9f5 | 2030 | switch (enabler->event_param.u.syscall.entryexit) { |
606828e4 | 2031 | case LTTNG_KERNEL_ABI_SYSCALL_ENTRYEXIT: |
badfe9f5 | 2032 | break; |
606828e4 | 2033 | case LTTNG_KERNEL_ABI_SYSCALL_ENTRY: |
badfe9f5 MD |
2034 | if (!entry) |
2035 | return 0; | |
2036 | break; | |
606828e4 | 2037 | case LTTNG_KERNEL_ABI_SYSCALL_EXIT: |
badfe9f5 MD |
2038 | if (entry) |
2039 | return 0; | |
2040 | break; | |
2041 | default: | |
2042 | return -EINVAL; | |
2043 | } | |
2044 | switch (enabler->event_param.u.syscall.abi) { | |
606828e4 | 2045 | case LTTNG_KERNEL_ABI_SYSCALL_ABI_ALL: |
badfe9f5 | 2046 | break; |
606828e4 | 2047 | case LTTNG_KERNEL_ABI_SYSCALL_ABI_NATIVE: |
badfe9f5 MD |
2048 | if (compat) |
2049 | return 0; | |
2050 | break; | |
606828e4 | 2051 | case LTTNG_KERNEL_ABI_SYSCALL_ABI_COMPAT: |
badfe9f5 MD |
2052 | if (!compat) |
2053 | return 0; | |
2054 | break; | |
2055 | default: | |
2056 | return -EINVAL; | |
2057 | } | |
2058 | switch (enabler->event_param.u.syscall.match) { | |
606828e4 | 2059 | case LTTNG_KERNEL_ABI_SYSCALL_MATCH_NAME: |
3b861b22 FD |
2060 | switch (enabler->format_type) { |
2061 | case LTTNG_ENABLER_FORMAT_STAR_GLOB: | |
badfe9f5 | 2062 | return lttng_match_enabler_star_glob(desc_name, enabler_name); |
3b861b22 | 2063 | case LTTNG_ENABLER_FORMAT_NAME: |
badfe9f5 MD |
2064 | return lttng_match_enabler_name(desc_name, enabler_name); |
2065 | default: | |
2066 | return -EINVAL; | |
2067 | } | |
2068 | break; | |
606828e4 | 2069 | case LTTNG_KERNEL_ABI_SYSCALL_MATCH_NR: |
badfe9f5 MD |
2070 | return -EINVAL; /* Not implemented. */ |
2071 | default: | |
2072 | return -EINVAL; | |
2073 | } | |
4ecb5ad5 | 2074 | break; |
b4a75708 | 2075 | |
4ecb5ad5 MD |
2076 | default: |
2077 | WARN_ON_ONCE(1); | |
2078 | return -EINVAL; | |
2079 | } | |
3c997079 MD |
2080 | } |
2081 | ||
2082 | static | |
1ae083ba | 2083 | int lttng_event_enabler_match_event(struct lttng_event_recorder_enabler *event_enabler, |
a67ba386 | 2084 | struct lttng_kernel_event_recorder *event_recorder) |
3c997079 | 2085 | { |
1ae083ba | 2086 | struct lttng_event_enabler_common *base_enabler = lttng_event_recorder_enabler_as_enabler( |
b2bc0bc8 FD |
2087 | event_enabler); |
2088 | ||
a67ba386 | 2089 | if (base_enabler->event_param.instrumentation != event_recorder->priv->parent.instrumentation) |
33a39a3c | 2090 | return 0; |
a67ba386 MD |
2091 | if (lttng_desc_match_enabler(event_recorder->priv->parent.desc, base_enabler) |
2092 | && event_recorder->chan == event_enabler->chan) | |
3c997079 MD |
2093 | return 1; |
2094 | else | |
2095 | return 0; | |
2096 | } | |
2097 | ||
b01155ba FD |
2098 | static |
2099 | int lttng_event_notifier_enabler_match_event_notifier(struct lttng_event_notifier_enabler *event_notifier_enabler, | |
a67ba386 | 2100 | struct lttng_kernel_event_notifier *event_notifier) |
b01155ba | 2101 | { |
8d554755 | 2102 | struct lttng_event_enabler_common *base_enabler = lttng_event_notifier_enabler_as_enabler( |
b01155ba FD |
2103 | event_notifier_enabler); |
2104 | ||
a67ba386 | 2105 | if (base_enabler->event_param.instrumentation != event_notifier->priv->parent.instrumentation) |
b01155ba | 2106 | return 0; |
a67ba386 MD |
2107 | if (lttng_desc_match_enabler(event_notifier->priv->parent.desc, base_enabler) |
2108 | && event_notifier->priv->group == event_notifier_enabler->group | |
5b9817ae | 2109 | && event_notifier->priv->parent.user_token == event_notifier_enabler->parent.user_token) |
b01155ba FD |
2110 | return 1; |
2111 | else | |
2112 | return 0; | |
2113 | } | |
2114 | ||
3c997079 | 2115 | static |
b2bc0bc8 FD |
2116 | struct lttng_enabler_ref *lttng_enabler_ref( |
2117 | struct list_head *enablers_ref_list, | |
8d554755 | 2118 | struct lttng_event_enabler_common *enabler) |
3c997079 MD |
2119 | { |
2120 | struct lttng_enabler_ref *enabler_ref; | |
2121 | ||
b2bc0bc8 | 2122 | list_for_each_entry(enabler_ref, enablers_ref_list, node) { |
3c997079 MD |
2123 | if (enabler_ref->ref == enabler) |
2124 | return enabler_ref; | |
2125 | } | |
2126 | return NULL; | |
2127 | } | |
2128 | ||
3c997079 | 2129 | static |
1ae083ba | 2130 | void lttng_create_tracepoint_event_if_missing(struct lttng_event_recorder_enabler *event_enabler) |
3c997079 | 2131 | { |
f7d06400 | 2132 | struct lttng_kernel_session *session = event_enabler->chan->parent.session; |
437d5aa5 MD |
2133 | struct lttng_kernel_probe_desc *probe_desc; |
2134 | const struct lttng_kernel_event_desc *desc; | |
3c997079 MD |
2135 | int i; |
2136 | struct list_head *probe_list; | |
2137 | ||
2138 | probe_list = lttng_get_probe_list_head(); | |
2139 | /* | |
2140 | * For each probe event, if we find that a probe event matches | |
2141 | * our enabler, create an associated lttng_event if not | |
2142 | * already present. | |
2143 | */ | |
2144 | list_for_each_entry(probe_desc, probe_list, head) { | |
2145 | for (i = 0; i < probe_desc->nr_events; i++) { | |
2146 | int found = 0; | |
2147 | struct hlist_head *head; | |
a67ba386 MD |
2148 | struct lttng_kernel_event_recorder_private *event_recorder_private; |
2149 | struct lttng_kernel_event_recorder *event_recorder; | |
3c997079 MD |
2150 | |
2151 | desc = probe_desc->event_desc[i]; | |
b2bc0bc8 | 2152 | if (!lttng_desc_match_enabler(desc, |
1ae083ba | 2153 | lttng_event_recorder_enabler_as_enabler(event_enabler))) |
3c997079 | 2154 | continue; |
3c997079 MD |
2155 | |
2156 | /* | |
2157 | * Check if already created. | |
2158 | */ | |
4a11ef1c | 2159 | head = utils_borrow_hash_table_bucket( |
8cdc1a81 | 2160 | session->priv->events_ht.table, LTTNG_EVENT_HT_SIZE, |
437d5aa5 | 2161 | desc->event_name); |
a67ba386 MD |
2162 | lttng_hlist_for_each_entry(event_recorder_private, head, hlist) { |
2163 | if (event_recorder_private->parent.desc == desc | |
2164 | && event_recorder_private->pub->chan == event_enabler->chan) | |
3c997079 MD |
2165 | found = 1; |
2166 | } | |
2167 | if (found) | |
2168 | continue; | |
2169 | ||
2170 | /* | |
2171 | * We need to create an event for this | |
2172 | * event probe. | |
2173 | */ | |
def1e304 | 2174 | event_recorder = _lttng_kernel_event_recorder_create(event_enabler, desc); |
a67ba386 | 2175 | if (!event_recorder) { |
5a15f70c | 2176 | printk(KERN_INFO "LTTng: Unable to create event %s\n", |
437d5aa5 | 2177 | probe_desc->event_desc[i]->event_name); |
3c997079 MD |
2178 | } |
2179 | } | |
2180 | } | |
2181 | } | |
2182 | ||
b01155ba FD |
2183 | static |
2184 | void lttng_create_tracepoint_event_notifier_if_missing(struct lttng_event_notifier_enabler *event_notifier_enabler) | |
2185 | { | |
2186 | struct lttng_event_notifier_group *event_notifier_group = event_notifier_enabler->group; | |
437d5aa5 MD |
2187 | struct lttng_kernel_probe_desc *probe_desc; |
2188 | const struct lttng_kernel_event_desc *desc; | |
b01155ba FD |
2189 | int i; |
2190 | struct list_head *probe_list; | |
2191 | ||
2192 | probe_list = lttng_get_probe_list_head(); | |
2193 | /* | |
2194 | * For each probe event, if we find that a probe event matches | |
2195 | * our enabler, create an associated lttng_event_notifier if not | |
2196 | * already present. | |
2197 | */ | |
2198 | list_for_each_entry(probe_desc, probe_list, head) { | |
2199 | for (i = 0; i < probe_desc->nr_events; i++) { | |
2200 | int found = 0; | |
2201 | struct hlist_head *head; | |
a67ba386 MD |
2202 | struct lttng_kernel_event_notifier_private *event_notifier_priv; |
2203 | struct lttng_kernel_event_notifier *event_notifier; | |
b01155ba FD |
2204 | |
2205 | desc = probe_desc->event_desc[i]; | |
2206 | if (!lttng_desc_match_enabler(desc, | |
2207 | lttng_event_notifier_enabler_as_enabler(event_notifier_enabler))) | |
2208 | continue; | |
2209 | ||
2210 | /* | |
2211 | * Check if already created. | |
2212 | */ | |
2213 | head = utils_borrow_hash_table_bucket( | |
2214 | event_notifier_group->event_notifiers_ht.table, | |
437d5aa5 | 2215 | LTTNG_EVENT_NOTIFIER_HT_SIZE, desc->event_name); |
a67ba386 MD |
2216 | lttng_hlist_for_each_entry(event_notifier_priv, head, hlist) { |
2217 | if (event_notifier_priv->parent.desc == desc | |
5b9817ae | 2218 | && event_notifier_priv->parent.user_token == event_notifier_enabler->parent.user_token) |
b01155ba FD |
2219 | found = 1; |
2220 | } | |
2221 | if (found) | |
2222 | continue; | |
2223 | ||
2224 | /* | |
2225 | * We need to create a event_notifier for this event probe. | |
2226 | */ | |
2227 | event_notifier = _lttng_event_notifier_create(desc, | |
5b9817ae | 2228 | event_notifier_enabler->parent.user_token, |
99f52fcc | 2229 | event_notifier_enabler->error_counter_index, |
a67ba386 | 2230 | event_notifier_group, NULL, |
606828e4 | 2231 | LTTNG_KERNEL_ABI_TRACEPOINT); |
b01155ba FD |
2232 | if (IS_ERR(event_notifier)) { |
2233 | printk(KERN_INFO "Unable to create event_notifier %s\n", | |
437d5aa5 | 2234 | probe_desc->event_desc[i]->event_name); |
b01155ba FD |
2235 | } |
2236 | } | |
2237 | } | |
2238 | } | |
2239 | ||
33a39a3c | 2240 | static |
1ae083ba | 2241 | void lttng_create_syscall_event_if_missing(struct lttng_event_recorder_enabler *event_enabler) |
33a39a3c MD |
2242 | { |
2243 | int ret; | |
2244 | ||
d26015f6 | 2245 | ret = lttng_syscalls_register_event(&event_enabler->parent); |
33a39a3c MD |
2246 | WARN_ON_ONCE(ret); |
2247 | } | |
2248 | ||
8a8ac9a8 FD |
2249 | static |
2250 | void lttng_create_syscall_event_notifier_if_missing(struct lttng_event_notifier_enabler *event_notifier_enabler) | |
2251 | { | |
2252 | int ret; | |
2253 | ||
d26015f6 | 2254 | ret = lttng_syscalls_register_event(&event_notifier_enabler->parent); |
8a8ac9a8 | 2255 | WARN_ON_ONCE(ret); |
8a8ac9a8 FD |
2256 | } |
2257 | ||
33a39a3c | 2258 | /* |
a67ba386 | 2259 | * Create struct lttng_kernel_event_recorder if it is missing and present in the list of |
33a39a3c MD |
2260 | * tracepoint probes. |
2261 | * Should be called with sessions mutex held. | |
2262 | */ | |
2263 | static | |
1ae083ba | 2264 | void lttng_create_event_if_missing(struct lttng_event_recorder_enabler *event_enabler) |
33a39a3c | 2265 | { |
5b9817ae | 2266 | switch (event_enabler->parent.event_param.instrumentation) { |
606828e4 | 2267 | case LTTNG_KERNEL_ABI_TRACEPOINT: |
1b917d6b | 2268 | lttng_create_tracepoint_event_if_missing(event_enabler); |
33a39a3c | 2269 | break; |
b4a75708 | 2270 | |
606828e4 | 2271 | case LTTNG_KERNEL_ABI_SYSCALL: |
1b917d6b | 2272 | lttng_create_syscall_event_if_missing(event_enabler); |
33a39a3c | 2273 | break; |
b4a75708 | 2274 | |
33a39a3c MD |
2275 | default: |
2276 | WARN_ON_ONCE(1); | |
2277 | break; | |
2278 | } | |
2279 | } | |
2280 | ||
3c997079 | 2281 | /* |
b2bc0bc8 | 2282 | * Create events associated with an event_enabler (if not already present), |
3c997079 MD |
2283 | * and add backward reference from the event to the enabler. |
2284 | * Should be called with sessions mutex held. | |
2285 | */ | |
2286 | static | |
1ae083ba | 2287 | int lttng_event_enabler_ref_events(struct lttng_event_recorder_enabler *event_enabler) |
3c997079 | 2288 | { |
f7d06400 MD |
2289 | struct lttng_kernel_channel_buffer *chan = event_enabler->chan; |
2290 | struct lttng_kernel_session *session = event_enabler->chan->parent.session; | |
1ae083ba | 2291 | struct lttng_event_enabler_common *base_enabler = lttng_event_recorder_enabler_as_enabler(event_enabler); |
a67ba386 | 2292 | struct lttng_kernel_event_recorder_private *event_recorder_priv; |
3c997079 | 2293 | |
606828e4 MD |
2294 | if (base_enabler->event_param.instrumentation == LTTNG_KERNEL_ABI_SYSCALL && |
2295 | base_enabler->event_param.u.syscall.abi == LTTNG_KERNEL_ABI_SYSCALL_ABI_ALL && | |
2296 | base_enabler->event_param.u.syscall.match == LTTNG_KERNEL_ABI_SYSCALL_MATCH_NAME && | |
b2bc0bc8 | 2297 | !strcmp(base_enabler->event_param.name, "*")) { |
3b82c4e1 | 2298 | int enabled = base_enabler->enabled; |
606828e4 | 2299 | enum lttng_kernel_abi_syscall_entryexit entryexit = base_enabler->event_param.u.syscall.entryexit; |
3b82c4e1 | 2300 | |
606828e4 | 2301 | if (entryexit == LTTNG_KERNEL_ABI_SYSCALL_ENTRY || entryexit == LTTNG_KERNEL_ABI_SYSCALL_ENTRYEXIT) |
0bb716a8 | 2302 | WRITE_ONCE(chan->priv->parent.syscall_table.syscall_all_entry, enabled); |
3b82c4e1 | 2303 | |
606828e4 | 2304 | if (entryexit == LTTNG_KERNEL_ABI_SYSCALL_EXIT || entryexit == LTTNG_KERNEL_ABI_SYSCALL_ENTRYEXIT) |
0bb716a8 | 2305 | WRITE_ONCE(chan->priv->parent.syscall_table.syscall_all_exit, enabled); |
badfe9f5 MD |
2306 | } |
2307 | ||
3c997079 | 2308 | /* First ensure that probe events are created for this enabler. */ |
b2bc0bc8 | 2309 | lttng_create_event_if_missing(event_enabler); |
3c997079 | 2310 | |
b2bc0bc8 | 2311 | /* For each event matching event_enabler in session event list. */ |
8cdc1a81 | 2312 | list_for_each_entry(event_recorder_priv, &session->priv->events, node) { |
a67ba386 | 2313 | struct lttng_kernel_event_recorder *event_recorder = event_recorder_priv->pub; |
3c997079 MD |
2314 | struct lttng_enabler_ref *enabler_ref; |
2315 | ||
a67ba386 | 2316 | if (!lttng_event_enabler_match_event(event_enabler, event_recorder)) |
3c997079 | 2317 | continue; |
a67ba386 | 2318 | enabler_ref = lttng_enabler_ref(&event_recorder_priv->parent.enablers_ref_head, |
1ae083ba | 2319 | lttng_event_recorder_enabler_as_enabler(event_enabler)); |
3c997079 MD |
2320 | if (!enabler_ref) { |
2321 | /* | |
2322 | * If no backward ref, create it. | |
b2bc0bc8 | 2323 | * Add backward ref from event to event_enabler. |
3c997079 MD |
2324 | */ |
2325 | enabler_ref = kzalloc(sizeof(*enabler_ref), GFP_KERNEL); | |
2326 | if (!enabler_ref) | |
2327 | return -ENOMEM; | |
1ae083ba | 2328 | enabler_ref->ref = lttng_event_recorder_enabler_as_enabler(event_enabler); |
3c997079 | 2329 | list_add(&enabler_ref->node, |
a67ba386 | 2330 | &event_recorder_priv->parent.enablers_ref_head); |
3c997079 MD |
2331 | } |
2332 | ||
f127e61e MD |
2333 | /* |
2334 | * Link filter bytecodes if not linked yet. | |
2335 | */ | |
a67ba386 | 2336 | lttng_enabler_link_bytecode(event_recorder_priv->parent.desc, |
2dfda770 | 2337 | lttng_static_ctx, |
a67ba386 | 2338 | &event_recorder_priv->parent.filter_bytecode_runtime_head, |
1ae083ba | 2339 | <tng_event_recorder_enabler_as_enabler(event_enabler)->filter_bytecode_head); |
3c997079 MD |
2340 | } |
2341 | return 0; | |
2342 | } | |
2343 | ||
b01155ba | 2344 | /* |
a67ba386 | 2345 | * Create struct lttng_kernel_event_notifier if it is missing and present in the list of |
b01155ba FD |
2346 | * tracepoint probes. |
2347 | * Should be called with sessions mutex held. | |
2348 | */ | |
2349 | static | |
2350 | void lttng_create_event_notifier_if_missing(struct lttng_event_notifier_enabler *event_notifier_enabler) | |
2351 | { | |
5b9817ae | 2352 | switch (event_notifier_enabler->parent.event_param.instrumentation) { |
606828e4 | 2353 | case LTTNG_KERNEL_ABI_TRACEPOINT: |
b01155ba FD |
2354 | lttng_create_tracepoint_event_notifier_if_missing(event_notifier_enabler); |
2355 | break; | |
b4a75708 | 2356 | |
606828e4 | 2357 | case LTTNG_KERNEL_ABI_SYSCALL: |
8a8ac9a8 FD |
2358 | lttng_create_syscall_event_notifier_if_missing(event_notifier_enabler); |
2359 | break; | |
b4a75708 | 2360 | |
b01155ba FD |
2361 | default: |
2362 | WARN_ON_ONCE(1); | |
2363 | break; | |
2364 | } | |
2365 | } | |
2366 | ||
2367 | /* | |
2368 | * Create event_notifiers associated with a event_notifier enabler (if not already present). | |
2369 | */ | |
2370 | static | |
8a8ac9a8 FD |
2371 | int lttng_event_notifier_enabler_ref_event_notifiers( |
2372 | struct lttng_event_notifier_enabler *event_notifier_enabler) | |
b01155ba FD |
2373 | { |
2374 | struct lttng_event_notifier_group *event_notifier_group = event_notifier_enabler->group; | |
8d554755 | 2375 | struct lttng_event_enabler_common *base_enabler = lttng_event_notifier_enabler_as_enabler(event_notifier_enabler); |
a67ba386 | 2376 | struct lttng_kernel_event_notifier_private *event_notifier_priv; |
b01155ba | 2377 | |
606828e4 MD |
2378 | if (base_enabler->event_param.instrumentation == LTTNG_KERNEL_ABI_SYSCALL && |
2379 | base_enabler->event_param.u.syscall.abi == LTTNG_KERNEL_ABI_SYSCALL_ABI_ALL && | |
2380 | base_enabler->event_param.u.syscall.match == LTTNG_KERNEL_ABI_SYSCALL_MATCH_NAME && | |
8a8ac9a8 FD |
2381 | !strcmp(base_enabler->event_param.name, "*")) { |
2382 | ||
2383 | int enabled = base_enabler->enabled; | |
606828e4 | 2384 | enum lttng_kernel_abi_syscall_entryexit entryexit = base_enabler->event_param.u.syscall.entryexit; |
8a8ac9a8 | 2385 | |
606828e4 | 2386 | if (entryexit == LTTNG_KERNEL_ABI_SYSCALL_ENTRY || entryexit == LTTNG_KERNEL_ABI_SYSCALL_ENTRYEXIT) |
0bb716a8 | 2387 | WRITE_ONCE(event_notifier_group->syscall_table.syscall_all_entry, enabled); |
8a8ac9a8 | 2388 | |
606828e4 | 2389 | if (entryexit == LTTNG_KERNEL_ABI_SYSCALL_EXIT || entryexit == LTTNG_KERNEL_ABI_SYSCALL_ENTRYEXIT) |
0bb716a8 | 2390 | WRITE_ONCE(event_notifier_group->syscall_table.syscall_all_exit, enabled); |
8a8ac9a8 FD |
2391 | |
2392 | } | |
2393 | ||
b01155ba FD |
2394 | /* First ensure that probe event_notifiers are created for this enabler. */ |
2395 | lttng_create_event_notifier_if_missing(event_notifier_enabler); | |
2396 | ||
2397 | /* Link the created event_notifier with its associated enabler. */ | |
a67ba386 MD |
2398 | list_for_each_entry(event_notifier_priv, &event_notifier_group->event_notifiers_head, node) { |
2399 | struct lttng_kernel_event_notifier *event_notifier = event_notifier_priv->pub; | |
b01155ba FD |
2400 | struct lttng_enabler_ref *enabler_ref; |
2401 | ||
2402 | if (!lttng_event_notifier_enabler_match_event_notifier(event_notifier_enabler, event_notifier)) | |
2403 | continue; | |
2404 | ||
a67ba386 | 2405 | enabler_ref = lttng_enabler_ref(&event_notifier_priv->parent.enablers_ref_head, |
b01155ba FD |
2406 | lttng_event_notifier_enabler_as_enabler(event_notifier_enabler)); |
2407 | if (!enabler_ref) { | |
2408 | /* | |
2409 | * If no backward ref, create it. | |
2410 | * Add backward ref from event_notifier to enabler. | |
2411 | */ | |
2412 | enabler_ref = kzalloc(sizeof(*enabler_ref), GFP_KERNEL); | |
2413 | if (!enabler_ref) | |
2414 | return -ENOMEM; | |
2415 | ||
2416 | enabler_ref->ref = lttng_event_notifier_enabler_as_enabler( | |
2417 | event_notifier_enabler); | |
2418 | list_add(&enabler_ref->node, | |
a67ba386 | 2419 | &event_notifier_priv->parent.enablers_ref_head); |
b01155ba FD |
2420 | } |
2421 | ||
2422 | /* | |
2423 | * Link filter bytecodes if not linked yet. | |
2424 | */ | |
a67ba386 MD |
2425 | lttng_enabler_link_bytecode(event_notifier_priv->parent.desc, |
2426 | lttng_static_ctx, &event_notifier_priv->parent.filter_bytecode_runtime_head, | |
60206944 | 2427 | <tng_event_notifier_enabler_as_enabler(event_notifier_enabler)->filter_bytecode_head); |
99d223ad FD |
2428 | |
2429 | /* Link capture bytecodes if not linked yet. */ | |
a67ba386 MD |
2430 | lttng_enabler_link_bytecode(event_notifier_priv->parent.desc, |
2431 | lttng_static_ctx, &event_notifier_priv->capture_bytecode_runtime_head, | |
99d223ad FD |
2432 | &event_notifier_enabler->capture_bytecode_head); |
2433 | ||
a67ba386 | 2434 | event_notifier_priv->num_captures = event_notifier_enabler->num_captures; |
b01155ba FD |
2435 | } |
2436 | return 0; | |
2437 | } | |
2438 | ||
3c997079 MD |
2439 | /* |
2440 | * Called at module load: connect the probe on all enablers matching | |
2441 | * this event. | |
2442 | * Called with sessions lock held. | |
2443 | */ | |
2444 | int lttng_fix_pending_events(void) | |
2445 | { | |
8cdc1a81 | 2446 | struct lttng_kernel_session_private *session_priv; |
3c997079 | 2447 | |
8cdc1a81 MD |
2448 | list_for_each_entry(session_priv, &sessions, list) |
2449 | lttng_session_lazy_sync_event_enablers(session_priv->pub); | |
3c997079 MD |
2450 | return 0; |
2451 | } | |
2452 | ||
b01155ba FD |
2453 | static bool lttng_event_notifier_group_has_active_event_notifiers( |
2454 | struct lttng_event_notifier_group *event_notifier_group) | |
2455 | { | |
2456 | struct lttng_event_notifier_enabler *event_notifier_enabler; | |
2457 | ||
2458 | list_for_each_entry(event_notifier_enabler, &event_notifier_group->enablers_head, | |
2459 | node) { | |
5b9817ae | 2460 | if (event_notifier_enabler->parent.enabled) |
b01155ba FD |
2461 | return true; |
2462 | } | |
2463 | return false; | |
2464 | } | |
2465 | ||
2466 | bool lttng_event_notifier_active(void) | |
2467 | { | |
2468 | struct lttng_event_notifier_group *event_notifier_group; | |
2469 | ||
2470 | list_for_each_entry(event_notifier_group, &event_notifier_groups, node) { | |
2471 | if (lttng_event_notifier_group_has_active_event_notifiers(event_notifier_group)) | |
2472 | return true; | |
2473 | } | |
2474 | return false; | |
2475 | } | |
2476 | ||
2477 | int lttng_fix_pending_event_notifiers(void) | |
2478 | { | |
2479 | struct lttng_event_notifier_group *event_notifier_group; | |
2480 | ||
2481 | list_for_each_entry(event_notifier_group, &event_notifier_groups, node) | |
2482 | lttng_event_notifier_group_sync_enablers(event_notifier_group); | |
2483 | return 0; | |
2484 | } | |
2485 | ||
1ae083ba | 2486 | struct lttng_event_recorder_enabler *lttng_event_recorder_enabler_create( |
b2bc0bc8 | 2487 | enum lttng_enabler_format_type format_type, |
606828e4 | 2488 | struct lttng_kernel_abi_event *event_param, |
f7d06400 | 2489 | struct lttng_kernel_channel_buffer *chan) |
3c997079 | 2490 | { |
1ae083ba | 2491 | struct lttng_event_recorder_enabler *event_enabler; |
3c997079 | 2492 | |
b2bc0bc8 FD |
2493 | event_enabler = kzalloc(sizeof(*event_enabler), GFP_KERNEL); |
2494 | if (!event_enabler) | |
3c997079 | 2495 | return NULL; |
0bb716a8 | 2496 | event_enabler->parent.enabler_type = LTTNG_EVENT_ENABLER_TYPE_RECORDER; |
5b9817ae MD |
2497 | event_enabler->parent.format_type = format_type; |
2498 | INIT_LIST_HEAD(&event_enabler->parent.filter_bytecode_head); | |
2499 | memcpy(&event_enabler->parent.event_param, event_param, | |
2500 | sizeof(event_enabler->parent.event_param)); | |
b2bc0bc8 | 2501 | event_enabler->chan = chan; |
3c997079 | 2502 | /* ctx left NULL */ |
5b9817ae | 2503 | event_enabler->parent.enabled = 0; |
def1e304 MD |
2504 | return event_enabler; |
2505 | } | |
2506 | ||
2507 | void lttng_event_enabler_session_add(struct lttng_kernel_session *session, | |
1ae083ba | 2508 | struct lttng_event_recorder_enabler *event_enabler) |
def1e304 | 2509 | { |
3c997079 | 2510 | mutex_lock(&sessions_mutex); |
def1e304 MD |
2511 | list_add(&event_enabler->node, &session->priv->enablers_head); |
2512 | event_enabler->published = true; | |
2513 | lttng_session_lazy_sync_event_enablers(session); | |
3c997079 | 2514 | mutex_unlock(&sessions_mutex); |
3c997079 MD |
2515 | } |
2516 | ||
7b25ab0e | 2517 | int lttng_event_enabler_enable(struct lttng_event_enabler_common *event_enabler) |
3c997079 MD |
2518 | { |
2519 | mutex_lock(&sessions_mutex); | |
7b25ab0e MD |
2520 | event_enabler->enabled = 1; |
2521 | lttng_event_enabler_sync(event_enabler); | |
3c997079 MD |
2522 | mutex_unlock(&sessions_mutex); |
2523 | return 0; | |
2524 | } | |
2525 | ||
7b25ab0e | 2526 | int lttng_event_enabler_disable(struct lttng_event_enabler_common *event_enabler) |
3c997079 MD |
2527 | { |
2528 | mutex_lock(&sessions_mutex); | |
7b25ab0e MD |
2529 | event_enabler->enabled = 0; |
2530 | lttng_event_enabler_sync(event_enabler); | |
3c997079 MD |
2531 | mutex_unlock(&sessions_mutex); |
2532 | return 0; | |
2533 | } | |
2534 | ||
b2bc0bc8 | 2535 | static |
8d554755 | 2536 | int lttng_enabler_attach_filter_bytecode(struct lttng_event_enabler_common *enabler, |
606828e4 | 2537 | struct lttng_kernel_abi_filter_bytecode __user *bytecode) |
07dfc1d0 | 2538 | { |
d64ca521 | 2539 | struct lttng_kernel_bytecode_node *bytecode_node; |
07dfc1d0 MD |
2540 | uint32_t bytecode_len; |
2541 | int ret; | |
2542 | ||
2543 | ret = get_user(bytecode_len, &bytecode->len); | |
2544 | if (ret) | |
2545 | return ret; | |
52cfcdf3 | 2546 | bytecode_node = lttng_kvzalloc(sizeof(*bytecode_node) + bytecode_len, |
07dfc1d0 MD |
2547 | GFP_KERNEL); |
2548 | if (!bytecode_node) | |
2549 | return -ENOMEM; | |
2550 | ret = copy_from_user(&bytecode_node->bc, bytecode, | |
2551 | sizeof(*bytecode) + bytecode_len); | |
2552 | if (ret) | |
2553 | goto error_free; | |
b2bc0bc8 | 2554 | |
8a445457 | 2555 | bytecode_node->type = LTTNG_KERNEL_BYTECODE_TYPE_FILTER; |
07dfc1d0 MD |
2556 | bytecode_node->enabler = enabler; |
2557 | /* Enforce length based on allocated size */ | |
2558 | bytecode_node->bc.len = bytecode_len; | |
2559 | list_add_tail(&bytecode_node->node, &enabler->filter_bytecode_head); | |
b2bc0bc8 | 2560 | |
07dfc1d0 MD |
2561 | return 0; |
2562 | ||
2563 | error_free: | |
52cfcdf3 | 2564 | lttng_kvfree(bytecode_node); |
07dfc1d0 MD |
2565 | return ret; |
2566 | } | |
2567 | ||
6048044f | 2568 | int lttng_event_enabler_attach_filter_bytecode(struct lttng_event_enabler_common *event_enabler, |
606828e4 | 2569 | struct lttng_kernel_abi_filter_bytecode __user *bytecode) |
b2bc0bc8 FD |
2570 | { |
2571 | int ret; | |
6048044f | 2572 | ret = lttng_enabler_attach_filter_bytecode(event_enabler, bytecode); |
b2bc0bc8 FD |
2573 | if (ret) |
2574 | goto error; | |
7b25ab0e | 2575 | lttng_event_enabler_sync(event_enabler); |
b2bc0bc8 FD |
2576 | return 0; |
2577 | ||
2578 | error: | |
2579 | return ret; | |
2580 | } | |
2581 | ||
e2d5dbc7 | 2582 | int lttng_event_add_callsite(struct lttng_kernel_event_common *event, |
606828e4 | 2583 | struct lttng_kernel_abi_event_callsite __user *callsite) |
3aed4dca FD |
2584 | { |
2585 | ||
e2d5dbc7 | 2586 | switch (event->priv->instrumentation) { |
606828e4 | 2587 | case LTTNG_KERNEL_ABI_UPROBE: |
e2d5dbc7 | 2588 | return lttng_uprobes_event_add_callsite(event, callsite); |
3aed4dca FD |
2589 | default: |
2590 | return -EINVAL; | |
2591 | } | |
2592 | } | |
2593 | ||
3c997079 | 2594 | static |
8d554755 | 2595 | void lttng_enabler_destroy(struct lttng_event_enabler_common *enabler) |
3c997079 | 2596 | { |
d64ca521 | 2597 | struct lttng_kernel_bytecode_node *filter_node, *tmp_filter_node; |
07dfc1d0 MD |
2598 | |
2599 | /* Destroy filter bytecode */ | |
2600 | list_for_each_entry_safe(filter_node, tmp_filter_node, | |
2601 | &enabler->filter_bytecode_head, node) { | |
52cfcdf3 | 2602 | lttng_kvfree(filter_node); |
07dfc1d0 | 2603 | } |
b2bc0bc8 FD |
2604 | } |
2605 | ||
44b1abdc | 2606 | void lttng_event_enabler_destroy(struct lttng_event_enabler_common *event_enabler) |
b2bc0bc8 | 2607 | { |
44b1abdc MD |
2608 | switch (event_enabler->enabler_type) { |
2609 | case LTTNG_EVENT_ENABLER_TYPE_RECORDER: | |
2610 | { | |
2611 | struct lttng_event_recorder_enabler *event_recorder_enabler = | |
2612 | container_of(event_enabler, struct lttng_event_recorder_enabler, parent); | |
2613 | ||
2614 | lttng_enabler_destroy(event_enabler); | |
2615 | if (event_recorder_enabler->published) | |
2616 | list_del(&event_recorder_enabler->node); | |
2617 | kfree(event_recorder_enabler); | |
2618 | break; | |
2619 | } | |
2620 | case LTTNG_EVENT_ENABLER_TYPE_NOTIFIER: | |
2621 | { | |
2622 | struct lttng_event_notifier_enabler *event_notifier_enabler = | |
2623 | container_of(event_enabler, struct lttng_event_notifier_enabler, parent); | |
07dfc1d0 | 2624 | |
44b1abdc MD |
2625 | list_del(&event_notifier_enabler->node); |
2626 | lttng_enabler_destroy(event_enabler); | |
2627 | kfree(event_notifier_enabler); | |
2628 | break; | |
2629 | } | |
2630 | default: | |
2631 | WARN_ON_ONCE(1); | |
2632 | } | |
3c997079 MD |
2633 | } |
2634 | ||
dffef45d FD |
2635 | struct lttng_event_notifier_enabler *lttng_event_notifier_enabler_create( |
2636 | struct lttng_event_notifier_group *event_notifier_group, | |
2637 | enum lttng_enabler_format_type format_type, | |
606828e4 | 2638 | struct lttng_kernel_abi_event_notifier *event_notifier_param) |
dffef45d FD |
2639 | { |
2640 | struct lttng_event_notifier_enabler *event_notifier_enabler; | |
2641 | ||
2642 | event_notifier_enabler = kzalloc(sizeof(*event_notifier_enabler), GFP_KERNEL); | |
2643 | if (!event_notifier_enabler) | |
2644 | return NULL; | |
2645 | ||
0bb716a8 | 2646 | event_notifier_enabler->parent.enabler_type = LTTNG_EVENT_ENABLER_TYPE_NOTIFIER; |
5b9817ae MD |
2647 | event_notifier_enabler->parent.format_type = format_type; |
2648 | INIT_LIST_HEAD(&event_notifier_enabler->parent.filter_bytecode_head); | |
99d223ad FD |
2649 | INIT_LIST_HEAD(&event_notifier_enabler->capture_bytecode_head); |
2650 | ||
99f52fcc | 2651 | event_notifier_enabler->error_counter_index = event_notifier_param->error_counter_index; |
99d223ad | 2652 | event_notifier_enabler->num_captures = 0; |
dffef45d | 2653 | |
5b9817ae MD |
2654 | memcpy(&event_notifier_enabler->parent.event_param, &event_notifier_param->event, |
2655 | sizeof(event_notifier_enabler->parent.event_param)); | |
dffef45d | 2656 | |
5b9817ae MD |
2657 | event_notifier_enabler->parent.enabled = 0; |
2658 | event_notifier_enabler->parent.user_token = event_notifier_param->event.token; | |
dffef45d FD |
2659 | event_notifier_enabler->group = event_notifier_group; |
2660 | ||
2661 | mutex_lock(&sessions_mutex); | |
2662 | list_add(&event_notifier_enabler->node, &event_notifier_enabler->group->enablers_head); | |
b01155ba | 2663 | lttng_event_notifier_group_sync_enablers(event_notifier_enabler->group); |
dffef45d FD |
2664 | |
2665 | mutex_unlock(&sessions_mutex); | |
2666 | ||
2667 | return event_notifier_enabler; | |
2668 | } | |
2669 | ||
2670 | int lttng_event_notifier_enabler_enable( | |
2671 | struct lttng_event_notifier_enabler *event_notifier_enabler) | |
2672 | { | |
2673 | mutex_lock(&sessions_mutex); | |
2674 | lttng_event_notifier_enabler_as_enabler(event_notifier_enabler)->enabled = 1; | |
b01155ba | 2675 | lttng_event_notifier_group_sync_enablers(event_notifier_enabler->group); |
dffef45d FD |
2676 | mutex_unlock(&sessions_mutex); |
2677 | return 0; | |
2678 | } | |
2679 | ||
2680 | int lttng_event_notifier_enabler_disable( | |
2681 | struct lttng_event_notifier_enabler *event_notifier_enabler) | |
2682 | { | |
2683 | mutex_lock(&sessions_mutex); | |
2684 | lttng_event_notifier_enabler_as_enabler(event_notifier_enabler)->enabled = 0; | |
b01155ba | 2685 | lttng_event_notifier_group_sync_enablers(event_notifier_enabler->group); |
dffef45d FD |
2686 | mutex_unlock(&sessions_mutex); |
2687 | return 0; | |
2688 | } | |
2689 | ||
99d223ad FD |
2690 | int lttng_event_notifier_enabler_attach_capture_bytecode( |
2691 | struct lttng_event_notifier_enabler *event_notifier_enabler, | |
606828e4 | 2692 | struct lttng_kernel_abi_capture_bytecode __user *bytecode) |
99d223ad | 2693 | { |
d64ca521 | 2694 | struct lttng_kernel_bytecode_node *bytecode_node; |
8d554755 | 2695 | struct lttng_event_enabler_common *enabler = |
99d223ad FD |
2696 | lttng_event_notifier_enabler_as_enabler(event_notifier_enabler); |
2697 | uint32_t bytecode_len; | |
2698 | int ret; | |
2699 | ||
2700 | ret = get_user(bytecode_len, &bytecode->len); | |
2701 | if (ret) | |
2702 | return ret; | |
2703 | ||
2704 | bytecode_node = lttng_kvzalloc(sizeof(*bytecode_node) + bytecode_len, | |
2705 | GFP_KERNEL); | |
2706 | if (!bytecode_node) | |
2707 | return -ENOMEM; | |
2708 | ||
2709 | ret = copy_from_user(&bytecode_node->bc, bytecode, | |
2710 | sizeof(*bytecode) + bytecode_len); | |
2711 | if (ret) | |
2712 | goto error_free; | |
2713 | ||
8a445457 | 2714 | bytecode_node->type = LTTNG_KERNEL_BYTECODE_TYPE_CAPTURE; |
99d223ad FD |
2715 | bytecode_node->enabler = enabler; |
2716 | ||
2717 | /* Enforce length based on allocated size */ | |
2718 | bytecode_node->bc.len = bytecode_len; | |
2719 | list_add_tail(&bytecode_node->node, &event_notifier_enabler->capture_bytecode_head); | |
2720 | ||
2721 | event_notifier_enabler->num_captures++; | |
2722 | ||
2723 | lttng_event_notifier_group_sync_enablers(event_notifier_enabler->group); | |
2724 | goto end; | |
2725 | ||
2726 | error_free: | |
2727 | lttng_kvfree(bytecode_node); | |
2728 | end: | |
2729 | return ret; | |
2730 | } | |
2731 | ||
3c997079 | 2732 | /* |
b2bc0bc8 | 2733 | * lttng_session_sync_event_enablers should be called just before starting a |
3c997079 MD |
2734 | * session. |
2735 | * Should be called with sessions mutex held. | |
2736 | */ | |
2737 | static | |
8cdc1a81 | 2738 | void lttng_session_sync_event_enablers(struct lttng_kernel_session *session) |
3c997079 | 2739 | { |
1ae083ba | 2740 | struct lttng_event_recorder_enabler *event_enabler; |
a67ba386 | 2741 | struct lttng_kernel_event_recorder_private *event_recorder_priv; |
3c997079 | 2742 | |
8cdc1a81 | 2743 | list_for_each_entry(event_enabler, &session->priv->enablers_head, node) |
b2bc0bc8 | 2744 | lttng_event_enabler_ref_events(event_enabler); |
3c997079 MD |
2745 | /* |
2746 | * For each event, if at least one of its enablers is enabled, | |
2747 | * and its channel and session transient states are enabled, we | |
2748 | * enable the event, else we disable it. | |
2749 | */ | |
8cdc1a81 | 2750 | list_for_each_entry(event_recorder_priv, &session->priv->events, node) { |
a67ba386 | 2751 | struct lttng_kernel_event_recorder *event_recorder = event_recorder_priv->pub; |
3c997079 | 2752 | struct lttng_enabler_ref *enabler_ref; |
218585b9 | 2753 | struct lttng_kernel_bytecode_runtime *runtime; |
e2d5dbc7 MD |
2754 | int enabled = 0, has_enablers_without_filter_bytecode = 0; |
2755 | int nr_filters = 0; | |
3c997079 | 2756 | |
a67ba386 | 2757 | switch (event_recorder_priv->parent.instrumentation) { |
c190d76e MJ |
2758 | case LTTNG_KERNEL_ABI_TRACEPOINT: |
2759 | lttng_fallthrough; | |
606828e4 | 2760 | case LTTNG_KERNEL_ABI_SYSCALL: |
3c997079 MD |
2761 | /* Enable events */ |
2762 | list_for_each_entry(enabler_ref, | |
a67ba386 | 2763 | &event_recorder_priv->parent.enablers_ref_head, node) { |
3c997079 MD |
2764 | if (enabler_ref->ref->enabled) { |
2765 | enabled = 1; | |
2766 | break; | |
2767 | } | |
2768 | } | |
4ecb5ad5 | 2769 | break; |
b4a75708 | 2770 | |
4ecb5ad5 | 2771 | default: |
3c997079 MD |
2772 | /* Not handled with lazy sync. */ |
2773 | continue; | |
2774 | } | |
2775 | /* | |
2776 | * Enabled state is based on union of enablers, with | |
2777 | * intesection of session and channel transient enable | |
2778 | * states. | |
2779 | */ | |
f7d06400 | 2780 | enabled = enabled && session->priv->tstate && event_recorder->chan->priv->parent.tstate; |
3c997079 | 2781 | |
a67ba386 | 2782 | WRITE_ONCE(event_recorder->parent.enabled, enabled); |
3c997079 MD |
2783 | /* |
2784 | * Sync tracepoint registration with event enabled | |
2785 | * state. | |
2786 | */ | |
2787 | if (enabled) { | |
96c59af1 | 2788 | register_event_recorder(event_recorder); |
3c997079 | 2789 | } else { |
96c59af1 | 2790 | _lttng_event_recorder_unregister(event_recorder); |
3c997079 | 2791 | } |
07dfc1d0 MD |
2792 | |
2793 | /* Check if has enablers without bytecode enabled */ | |
2794 | list_for_each_entry(enabler_ref, | |
a67ba386 | 2795 | &event_recorder_priv->parent.enablers_ref_head, node) { |
07dfc1d0 MD |
2796 | if (enabler_ref->ref->enabled |
2797 | && list_empty(&enabler_ref->ref->filter_bytecode_head)) { | |
e2d5dbc7 | 2798 | has_enablers_without_filter_bytecode = 1; |
07dfc1d0 MD |
2799 | break; |
2800 | } | |
2801 | } | |
a67ba386 | 2802 | event_recorder_priv->parent.has_enablers_without_filter_bytecode = |
e2d5dbc7 | 2803 | has_enablers_without_filter_bytecode; |
07dfc1d0 MD |
2804 | |
2805 | /* Enable filters */ | |
2806 | list_for_each_entry(runtime, | |
e2d5dbc7 | 2807 | &event_recorder_priv->parent.filter_bytecode_runtime_head, node) { |
8a445457 | 2808 | lttng_bytecode_sync_state(runtime); |
e2d5dbc7 MD |
2809 | nr_filters++; |
2810 | } | |
2811 | WRITE_ONCE(event_recorder_priv->parent.pub->eval_filter, | |
2812 | !(has_enablers_without_filter_bytecode || !nr_filters)); | |
3c997079 MD |
2813 | } |
2814 | } | |
2815 | ||
2816 | /* | |
2817 | * Apply enablers to session events, adding events to session if need | |
2818 | * be. It is required after each modification applied to an active | |
2819 | * session, and right before session "start". | |
2820 | * "lazy" sync means we only sync if required. | |
2821 | * Should be called with sessions mutex held. | |
2822 | */ | |
2823 | static | |
8cdc1a81 | 2824 | void lttng_session_lazy_sync_event_enablers(struct lttng_kernel_session *session) |
3c997079 MD |
2825 | { |
2826 | /* We can skip if session is not active */ | |
2827 | if (!session->active) | |
2828 | return; | |
b2bc0bc8 | 2829 | lttng_session_sync_event_enablers(session); |
3c997079 MD |
2830 | } |
2831 | ||
b01155ba FD |
2832 | static |
2833 | void lttng_event_notifier_group_sync_enablers(struct lttng_event_notifier_group *event_notifier_group) | |
2834 | { | |
2835 | struct lttng_event_notifier_enabler *event_notifier_enabler; | |
a67ba386 | 2836 | struct lttng_kernel_event_notifier_private *event_notifier_priv; |
b01155ba FD |
2837 | |
2838 | list_for_each_entry(event_notifier_enabler, &event_notifier_group->enablers_head, node) | |
2839 | lttng_event_notifier_enabler_ref_event_notifiers(event_notifier_enabler); | |
2840 | ||
2841 | /* | |
2842 | * For each event_notifier, if at least one of its enablers is enabled, | |
2843 | * we enable the event_notifier, else we disable it. | |
2844 | */ | |
a67ba386 MD |
2845 | list_for_each_entry(event_notifier_priv, &event_notifier_group->event_notifiers_head, node) { |
2846 | struct lttng_kernel_event_notifier *event_notifier = event_notifier_priv->pub; | |
b01155ba | 2847 | struct lttng_enabler_ref *enabler_ref; |
218585b9 | 2848 | struct lttng_kernel_bytecode_runtime *runtime; |
e2d5dbc7 MD |
2849 | int enabled = 0, has_enablers_without_filter_bytecode = 0; |
2850 | int nr_filters = 0, nr_captures = 0; | |
b01155ba | 2851 | |
a67ba386 | 2852 | switch (event_notifier_priv->parent.instrumentation) { |
c190d76e MJ |
2853 | case LTTNG_KERNEL_ABI_TRACEPOINT: |
2854 | lttng_fallthrough; | |
606828e4 | 2855 | case LTTNG_KERNEL_ABI_SYSCALL: |
b01155ba FD |
2856 | /* Enable event_notifiers */ |
2857 | list_for_each_entry(enabler_ref, | |
a67ba386 | 2858 | &event_notifier_priv->parent.enablers_ref_head, node) { |
b01155ba FD |
2859 | if (enabler_ref->ref->enabled) { |
2860 | enabled = 1; | |
2861 | break; | |
2862 | } | |
2863 | } | |
2864 | break; | |
b4a75708 | 2865 | |
b01155ba FD |
2866 | default: |
2867 | /* Not handled with sync. */ | |
2868 | continue; | |
2869 | } | |
2870 | ||
a67ba386 | 2871 | WRITE_ONCE(event_notifier->parent.enabled, enabled); |
b01155ba FD |
2872 | /* |
2873 | * Sync tracepoint registration with event_notifier enabled | |
2874 | * state. | |
2875 | */ | |
2876 | if (enabled) { | |
a67ba386 | 2877 | if (!event_notifier_priv->parent.registered) |
b01155ba FD |
2878 | register_event_notifier(event_notifier); |
2879 | } else { | |
a67ba386 | 2880 | if (event_notifier_priv->parent.registered) |
b01155ba FD |
2881 | _lttng_event_notifier_unregister(event_notifier); |
2882 | } | |
2883 | ||
2884 | /* Check if has enablers without bytecode enabled */ | |
2885 | list_for_each_entry(enabler_ref, | |
a67ba386 | 2886 | &event_notifier_priv->parent.enablers_ref_head, node) { |
b01155ba FD |
2887 | if (enabler_ref->ref->enabled |
2888 | && list_empty(&enabler_ref->ref->filter_bytecode_head)) { | |
e2d5dbc7 | 2889 | has_enablers_without_filter_bytecode = 1; |
b01155ba FD |
2890 | break; |
2891 | } | |
2892 | } | |
a67ba386 | 2893 | event_notifier_priv->parent.has_enablers_without_filter_bytecode = |
e2d5dbc7 | 2894 | has_enablers_without_filter_bytecode; |
b01155ba FD |
2895 | |
2896 | /* Enable filters */ | |
2897 | list_for_each_entry(runtime, | |
e2d5dbc7 | 2898 | &event_notifier_priv->parent.filter_bytecode_runtime_head, node) { |
8a445457 | 2899 | lttng_bytecode_sync_state(runtime); |
e2d5dbc7 MD |
2900 | nr_filters++; |
2901 | } | |
2902 | WRITE_ONCE(event_notifier_priv->parent.pub->eval_filter, | |
2903 | !(has_enablers_without_filter_bytecode || !nr_filters)); | |
99d223ad FD |
2904 | |
2905 | /* Enable captures */ | |
2906 | list_for_each_entry(runtime, | |
e2d5dbc7 | 2907 | &event_notifier_priv->capture_bytecode_runtime_head, node) { |
8a445457 | 2908 | lttng_bytecode_sync_state(runtime); |
e2d5dbc7 MD |
2909 | nr_captures++; |
2910 | } | |
2911 | WRITE_ONCE(event_notifier->eval_capture, !!nr_captures); | |
b01155ba FD |
2912 | } |
2913 | } | |
2914 | ||
7b25ab0e MD |
2915 | static |
2916 | void lttng_event_enabler_sync(struct lttng_event_enabler_common *event_enabler) | |
2917 | { | |
2918 | switch (event_enabler->enabler_type) { | |
2919 | case LTTNG_EVENT_ENABLER_TYPE_RECORDER: | |
2920 | { | |
2921 | struct lttng_event_recorder_enabler *event_recorder_enabler = | |
2922 | container_of(event_enabler, struct lttng_event_recorder_enabler, parent); | |
2923 | lttng_session_lazy_sync_event_enablers(event_recorder_enabler->chan->parent.session); | |
2924 | break; | |
2925 | } | |
2926 | case LTTNG_EVENT_ENABLER_TYPE_NOTIFIER: | |
2927 | { | |
2928 | struct lttng_event_notifier_enabler *event_notifier_enabler = | |
2929 | container_of(event_enabler, struct lttng_event_notifier_enabler, parent); | |
2930 | lttng_event_notifier_group_sync_enablers(event_notifier_enabler->group); | |
2931 | break; | |
2932 | } | |
2933 | default: | |
2934 | WARN_ON_ONCE(1); | |
2935 | } | |
2936 | } | |
2937 | ||
1ec3f75a | 2938 | /* |
d83004aa JD |
2939 | * Serialize at most one packet worth of metadata into a metadata |
2940 | * channel. | |
92d9f5e6 MD |
2941 | * We grab the metadata cache mutex to get exclusive access to our metadata |
2942 | * buffer and to the metadata cache. Exclusive access to the metadata buffer | |
2943 | * allows us to do racy operations such as looking for remaining space left in | |
2944 | * packet and write, since mutual exclusion protects us from concurrent writes. | |
2945 | * Mutual exclusion on the metadata cache allow us to read the cache content | |
2946 | * without racing against reallocation of the cache by updates. | |
35097f36 JD |
2947 | * Returns the number of bytes written in the channel, 0 if no data |
2948 | * was written and a negative value on error. | |
1ec3f75a | 2949 | */ |
b3b8072b | 2950 | int lttng_metadata_output_channel(struct lttng_metadata_stream *stream, |
860c213b | 2951 | struct lttng_kernel_ring_buffer_channel *chan, bool *coherent) |
d83004aa | 2952 | { |
8a57ec02 | 2953 | struct lttng_kernel_ring_buffer_ctx ctx; |
d83004aa JD |
2954 | int ret = 0; |
2955 | size_t len, reserve_len; | |
2956 | ||
f613e3e6 | 2957 | /* |
92d9f5e6 MD |
2958 | * Ensure we support mutiple get_next / put sequences followed by |
2959 | * put_next. The metadata cache lock protects reading the metadata | |
2960 | * cache. It can indeed be read concurrently by "get_next_subbuf" and | |
2961 | * "flush" operations on the buffer invoked by different processes. | |
2962 | * Moreover, since the metadata cache memory can be reallocated, we | |
2963 | * need to have exclusive access against updates even though we only | |
2964 | * read it. | |
f613e3e6 | 2965 | */ |
92d9f5e6 | 2966 | mutex_lock(&stream->metadata_cache->lock); |
f613e3e6 MD |
2967 | WARN_ON(stream->metadata_in < stream->metadata_out); |
2968 | if (stream->metadata_in != stream->metadata_out) | |
de23d59d | 2969 | goto end; |
f613e3e6 | 2970 | |
9616f0bf JD |
2971 | /* Metadata regenerated, change the version. */ |
2972 | if (stream->metadata_cache->version != stream->version) | |
2973 | stream->version = stream->metadata_cache->version; | |
2974 | ||
d83004aa | 2975 | len = stream->metadata_cache->metadata_written - |
f613e3e6 | 2976 | stream->metadata_in; |
9de2c215 | 2977 | if (!len) |
de23d59d | 2978 | goto end; |
d83004aa | 2979 | reserve_len = min_t(size_t, |
4a399b76 | 2980 | stream->transport->ops.priv->packet_avail_size(chan), |
d83004aa | 2981 | len); |
a775608d | 2982 | lib_ring_buffer_ctx_init(&ctx, chan, reserve_len, |
b1199bd3 | 2983 | sizeof(char), NULL); |
d83004aa JD |
2984 | /* |
2985 | * If reservation failed, return an error to the caller. | |
2986 | */ | |
c2fb9c1c | 2987 | ret = stream->transport->ops.event_reserve(&ctx); |
d83004aa JD |
2988 | if (ret != 0) { |
2989 | printk(KERN_WARNING "LTTng: Metadata event reservation failed\n"); | |
8b97fd42 | 2990 | stream->coherent = false; |
d83004aa JD |
2991 | goto end; |
2992 | } | |
b3b8072b | 2993 | stream->transport->ops.event_write(&ctx, |
f613e3e6 | 2994 | stream->metadata_cache->data + stream->metadata_in, |
f5ffbd77 | 2995 | reserve_len, 1); |
b3b8072b | 2996 | stream->transport->ops.event_commit(&ctx); |
f613e3e6 | 2997 | stream->metadata_in += reserve_len; |
3e75e2a7 | 2998 | if (reserve_len < len) |
8b97fd42 MD |
2999 | stream->coherent = false; |
3000 | else | |
3001 | stream->coherent = true; | |
d83004aa JD |
3002 | ret = reserve_len; |
3003 | ||
3004 | end: | |
8b97fd42 MD |
3005 | if (coherent) |
3006 | *coherent = stream->coherent; | |
92d9f5e6 | 3007 | mutex_unlock(&stream->metadata_cache->lock); |
d83004aa JD |
3008 | return ret; |
3009 | } | |
3010 | ||
8b97fd42 | 3011 | static |
8cdc1a81 | 3012 | void lttng_metadata_begin(struct lttng_kernel_session *session) |
8b97fd42 | 3013 | { |
8cdc1a81 MD |
3014 | if (atomic_inc_return(&session->priv->metadata_cache->producing) == 1) |
3015 | mutex_lock(&session->priv->metadata_cache->lock); | |
8b97fd42 MD |
3016 | } |
3017 | ||
3018 | static | |
8cdc1a81 | 3019 | void lttng_metadata_end(struct lttng_kernel_session *session) |
8b97fd42 | 3020 | { |
8cdc1a81 MD |
3021 | WARN_ON_ONCE(!atomic_read(&session->priv->metadata_cache->producing)); |
3022 | if (atomic_dec_return(&session->priv->metadata_cache->producing) == 0) { | |
3e75e2a7 MD |
3023 | struct lttng_metadata_stream *stream; |
3024 | ||
8cdc1a81 | 3025 | list_for_each_entry(stream, &session->priv->metadata_cache->metadata_stream, list) |
3e75e2a7 | 3026 | wake_up_interruptible(&stream->read_wait); |
8cdc1a81 | 3027 | mutex_unlock(&session->priv->metadata_cache->lock); |
3e75e2a7 | 3028 | } |
8b97fd42 MD |
3029 | } |
3030 | ||
d83004aa JD |
3031 | /* |
3032 | * Write the metadata to the metadata cache. | |
3033 | * Must be called with sessions_mutex held. | |
92d9f5e6 MD |
3034 | * The metadata cache lock protects us from concurrent read access from |
3035 | * thread outputting metadata content to ring buffer. | |
8b97fd42 MD |
3036 | * The content of the printf is printed as a single atomic metadata |
3037 | * transaction. | |
d83004aa | 3038 | */ |
8cdc1a81 | 3039 | int lttng_metadata_printf(struct lttng_kernel_session *session, |
c099397a MD |
3040 | const char *fmt, ...) |
3041 | { | |
c099397a | 3042 | char *str; |
d83004aa | 3043 | size_t len; |
c099397a MD |
3044 | va_list ap; |
3045 | ||
585e5dcc | 3046 | WARN_ON_ONCE(!LTTNG_READ_ONCE(session->active)); |
c099397a MD |
3047 | |
3048 | va_start(ap, fmt); | |
3049 | str = kvasprintf(GFP_KERNEL, fmt, ap); | |
3050 | va_end(ap); | |
3051 | if (!str) | |
3052 | return -ENOMEM; | |
3053 | ||
1ec3f75a | 3054 | len = strlen(str); |
8cdc1a81 MD |
3055 | WARN_ON_ONCE(!atomic_read(&session->priv->metadata_cache->producing)); |
3056 | if (session->priv->metadata_cache->metadata_written + len > | |
3057 | session->priv->metadata_cache->cache_alloc) { | |
d83004aa JD |
3058 | char *tmp_cache_realloc; |
3059 | unsigned int tmp_cache_alloc_size; | |
3060 | ||
3061 | tmp_cache_alloc_size = max_t(unsigned int, | |
8cdc1a81 MD |
3062 | session->priv->metadata_cache->cache_alloc + len, |
3063 | session->priv->metadata_cache->cache_alloc << 1); | |
0ca42eb7 | 3064 | tmp_cache_realloc = vzalloc(tmp_cache_alloc_size); |
d83004aa JD |
3065 | if (!tmp_cache_realloc) |
3066 | goto err; | |
8cdc1a81 | 3067 | if (session->priv->metadata_cache->data) { |
a606b6e8 | 3068 | memcpy(tmp_cache_realloc, |
8cdc1a81 MD |
3069 | session->priv->metadata_cache->data, |
3070 | session->priv->metadata_cache->cache_alloc); | |
3071 | vfree(session->priv->metadata_cache->data); | |
a606b6e8 ML |
3072 | } |
3073 | ||
8cdc1a81 MD |
3074 | session->priv->metadata_cache->cache_alloc = tmp_cache_alloc_size; |
3075 | session->priv->metadata_cache->data = tmp_cache_realloc; | |
c099397a | 3076 | } |
8cdc1a81 MD |
3077 | memcpy(session->priv->metadata_cache->data + |
3078 | session->priv->metadata_cache->metadata_written, | |
d83004aa | 3079 | str, len); |
8cdc1a81 | 3080 | session->priv->metadata_cache->metadata_written += len; |
c099397a | 3081 | kfree(str); |
d83004aa | 3082 | |
d83004aa JD |
3083 | return 0; |
3084 | ||
3085 | err: | |
3086 | kfree(str); | |
3087 | return -ENOMEM; | |
c099397a MD |
3088 | } |
3089 | ||
f513b2bf | 3090 | static |
8cdc1a81 | 3091 | int print_tabs(struct lttng_kernel_session *session, size_t nesting) |
f513b2bf MD |
3092 | { |
3093 | size_t i; | |
3094 | ||
3095 | for (i = 0; i < nesting; i++) { | |
3096 | int ret; | |
3097 | ||
3098 | ret = lttng_metadata_printf(session, " "); | |
3099 | if (ret) { | |
3100 | return ret; | |
3101 | } | |
3102 | } | |
3103 | return 0; | |
3104 | } | |
3105 | ||
ceabb767 | 3106 | static |
8cdc1a81 | 3107 | int lttng_field_name_statedump(struct lttng_kernel_session *session, |
437d5aa5 | 3108 | const struct lttng_kernel_event_field *field, |
ceabb767 MD |
3109 | size_t nesting) |
3110 | { | |
3111 | return lttng_metadata_printf(session, " _%s;\n", field->name); | |
3112 | } | |
3113 | ||
3114 | static | |
8cdc1a81 | 3115 | int _lttng_integer_type_statedump(struct lttng_kernel_session *session, |
437d5aa5 MD |
3116 | const struct lttng_kernel_type_integer *type, |
3117 | enum lttng_kernel_string_encoding parent_encoding, | |
ceabb767 MD |
3118 | size_t nesting) |
3119 | { | |
3120 | int ret; | |
3121 | ||
ceabb767 MD |
3122 | ret = print_tabs(session, nesting); |
3123 | if (ret) | |
3124 | return ret; | |
3125 | ret = lttng_metadata_printf(session, | |
3126 | "integer { size = %u; align = %u; signed = %u; encoding = %s; base = %u;%s }", | |
437d5aa5 MD |
3127 | type->size, |
3128 | type->alignment, | |
3129 | type->signedness, | |
3130 | (parent_encoding == lttng_kernel_string_encoding_none) | |
ceabb767 | 3131 | ? "none" |
437d5aa5 | 3132 | : (parent_encoding == lttng_kernel_string_encoding_UTF8) |
ceabb767 MD |
3133 | ? "UTF8" |
3134 | : "ASCII", | |
437d5aa5 | 3135 | type->base, |
ceabb767 | 3136 | #if __BYTE_ORDER == __BIG_ENDIAN |
437d5aa5 | 3137 | type->reverse_byte_order ? " byte_order = le;" : "" |
ceabb767 | 3138 | #else |
437d5aa5 | 3139 | type->reverse_byte_order ? " byte_order = be;" : "" |
ceabb767 MD |
3140 | #endif |
3141 | ); | |
3142 | return ret; | |
3143 | } | |
3144 | ||
f513b2bf MD |
3145 | /* |
3146 | * Must be called with sessions_mutex held. | |
3147 | */ | |
3148 | static | |
8cdc1a81 | 3149 | int _lttng_struct_type_statedump(struct lttng_kernel_session *session, |
437d5aa5 | 3150 | const struct lttng_kernel_type_struct *type, |
f513b2bf MD |
3151 | size_t nesting) |
3152 | { | |
51ef4536 | 3153 | const char *prev_field_name = NULL; |
f513b2bf MD |
3154 | int ret; |
3155 | uint32_t i, nr_fields; | |
ceabb767 MD |
3156 | unsigned int alignment; |
3157 | ||
f513b2bf MD |
3158 | ret = print_tabs(session, nesting); |
3159 | if (ret) | |
3160 | return ret; | |
3161 | ret = lttng_metadata_printf(session, | |
3162 | "struct {\n"); | |
3163 | if (ret) | |
3164 | return ret; | |
437d5aa5 | 3165 | nr_fields = type->nr_fields; |
f513b2bf | 3166 | for (i = 0; i < nr_fields; i++) { |
437d5aa5 | 3167 | const struct lttng_kernel_event_field *iter_field; |
f513b2bf | 3168 | |
437d5aa5 | 3169 | iter_field = type->fields[i]; |
51ef4536 | 3170 | ret = _lttng_field_statedump(session, iter_field, nesting + 1, &prev_field_name); |
f513b2bf MD |
3171 | if (ret) |
3172 | return ret; | |
3173 | } | |
3174 | ret = print_tabs(session, nesting); | |
3175 | if (ret) | |
3176 | return ret; | |
437d5aa5 | 3177 | alignment = type->alignment; |
ceabb767 MD |
3178 | if (alignment) { |
3179 | ret = lttng_metadata_printf(session, | |
3180 | "} align(%u)", | |
3181 | alignment); | |
3182 | } else { | |
3183 | ret = lttng_metadata_printf(session, | |
3184 | "}"); | |
3185 | } | |
f513b2bf MD |
3186 | return ret; |
3187 | } | |
3188 | ||
3189 | /* | |
3190 | * Must be called with sessions_mutex held. | |
3191 | */ | |
3192 | static | |
8cdc1a81 | 3193 | int _lttng_struct_field_statedump(struct lttng_kernel_session *session, |
437d5aa5 | 3194 | const struct lttng_kernel_event_field *field, |
f513b2bf MD |
3195 | size_t nesting) |
3196 | { | |
3197 | int ret; | |
3198 | ||
3199 | ret = _lttng_struct_type_statedump(session, | |
437d5aa5 | 3200 | lttng_kernel_get_type_struct(field->type), nesting); |
f513b2bf MD |
3201 | if (ret) |
3202 | return ret; | |
ceabb767 | 3203 | return lttng_field_name_statedump(session, field, nesting); |
f513b2bf MD |
3204 | } |
3205 | ||
65c85aa6 MD |
3206 | /* |
3207 | * Must be called with sessions_mutex held. | |
3208 | */ | |
3209 | static | |
8cdc1a81 | 3210 | int _lttng_variant_type_statedump(struct lttng_kernel_session *session, |
437d5aa5 | 3211 | const struct lttng_kernel_type_variant *type, |
51ef4536 MD |
3212 | size_t nesting, |
3213 | const char *prev_field_name) | |
65c85aa6 | 3214 | { |
51ef4536 | 3215 | const char *tag_name; |
65c85aa6 MD |
3216 | int ret; |
3217 | uint32_t i, nr_choices; | |
3218 | ||
51ef4536 MD |
3219 | tag_name = type->tag_name; |
3220 | if (!tag_name) | |
3221 | tag_name = prev_field_name; | |
3222 | if (!tag_name) | |
3223 | return -EINVAL; | |
ceabb767 MD |
3224 | /* |
3225 | * CTF 1.8 does not allow expressing nonzero variant alignment in a nestable way. | |
3226 | */ | |
437d5aa5 | 3227 | if (type->alignment != 0) |
ceabb767 | 3228 | return -EINVAL; |
65c85aa6 MD |
3229 | ret = print_tabs(session, nesting); |
3230 | if (ret) | |
3231 | return ret; | |
3232 | ret = lttng_metadata_printf(session, | |
3233 | "variant <_%s> {\n", | |
51ef4536 | 3234 | tag_name); |
65c85aa6 MD |
3235 | if (ret) |
3236 | return ret; | |
437d5aa5 | 3237 | nr_choices = type->nr_choices; |
65c85aa6 | 3238 | for (i = 0; i < nr_choices; i++) { |
437d5aa5 | 3239 | const struct lttng_kernel_event_field *iter_field; |
65c85aa6 | 3240 | |
437d5aa5 | 3241 | iter_field = type->choices[i]; |
51ef4536 | 3242 | ret = _lttng_field_statedump(session, iter_field, nesting + 1, NULL); |
65c85aa6 MD |
3243 | if (ret) |
3244 | return ret; | |
3245 | } | |
3246 | ret = print_tabs(session, nesting); | |
3247 | if (ret) | |
3248 | return ret; | |
3249 | ret = lttng_metadata_printf(session, | |
3250 | "}"); | |
3251 | return ret; | |
3252 | } | |
3253 | ||
3254 | /* | |
3255 | * Must be called with sessions_mutex held. | |
3256 | */ | |
3257 | static | |
8cdc1a81 | 3258 | int _lttng_variant_field_statedump(struct lttng_kernel_session *session, |
437d5aa5 | 3259 | const struct lttng_kernel_event_field *field, |
51ef4536 MD |
3260 | size_t nesting, |
3261 | const char *prev_field_name) | |
65c85aa6 MD |
3262 | { |
3263 | int ret; | |
3264 | ||
3265 | ret = _lttng_variant_type_statedump(session, | |
51ef4536 MD |
3266 | lttng_kernel_get_type_variant(field->type), nesting, |
3267 | prev_field_name); | |
65c85aa6 MD |
3268 | if (ret) |
3269 | return ret; | |
ceabb767 | 3270 | return lttng_field_name_statedump(session, field, nesting); |
65c85aa6 MD |
3271 | } |
3272 | ||
f513b2bf MD |
3273 | /* |
3274 | * Must be called with sessions_mutex held. | |
3275 | */ | |
3276 | static | |
8cdc1a81 | 3277 | int _lttng_array_field_statedump(struct lttng_kernel_session *session, |
437d5aa5 | 3278 | const struct lttng_kernel_event_field *field, |
f513b2bf MD |
3279 | size_t nesting) |
3280 | { | |
3281 | int ret; | |
437d5aa5 MD |
3282 | const struct lttng_kernel_type_array *array_type; |
3283 | const struct lttng_kernel_type_common *elem_type; | |
f513b2bf | 3284 | |
437d5aa5 MD |
3285 | array_type = lttng_kernel_get_type_array(field->type); |
3286 | WARN_ON_ONCE(!array_type); | |
ceabb767 | 3287 | |
437d5aa5 | 3288 | if (array_type->alignment) { |
ceabb767 | 3289 | ret = print_tabs(session, nesting); |
f513b2bf MD |
3290 | if (ret) |
3291 | return ret; | |
ceabb767 MD |
3292 | ret = lttng_metadata_printf(session, |
3293 | "struct { } align(%u) _%s_padding;\n", | |
437d5aa5 | 3294 | array_type->alignment * CHAR_BIT, |
ceabb767 MD |
3295 | field->name); |
3296 | if (ret) | |
3297 | return ret; | |
3298 | } | |
3299 | /* | |
3300 | * Nested compound types: Only array of structures and variants are | |
3301 | * currently supported. | |
3302 | */ | |
437d5aa5 | 3303 | elem_type = array_type->elem_type; |
12bb2edb MD |
3304 | switch (elem_type->type) { |
3305 | case lttng_kernel_type_integer: | |
437d5aa5 MD |
3306 | case lttng_kernel_type_struct: |
3307 | case lttng_kernel_type_variant: | |
3308 | ret = _lttng_type_statedump(session, elem_type, | |
3309 | array_type->encoding, nesting); | |
65c85aa6 MD |
3310 | if (ret) |
3311 | return ret; | |
3312 | break; | |
ceabb767 | 3313 | |
f513b2bf MD |
3314 | default: |
3315 | return -EINVAL; | |
3316 | } | |
3317 | ret = lttng_metadata_printf(session, | |
3318 | " _%s[%u];\n", | |
3319 | field->name, | |
437d5aa5 | 3320 | array_type->length); |
f513b2bf MD |
3321 | return ret; |
3322 | } | |
3323 | ||
3324 | /* | |
3325 | * Must be called with sessions_mutex held. | |
3326 | */ | |
3327 | static | |
8cdc1a81 | 3328 | int _lttng_sequence_field_statedump(struct lttng_kernel_session *session, |
437d5aa5 | 3329 | const struct lttng_kernel_event_field *field, |
51ef4536 MD |
3330 | size_t nesting, |
3331 | const char *prev_field_name) | |
f513b2bf MD |
3332 | { |
3333 | int ret; | |
3334 | const char *length_name; | |
437d5aa5 MD |
3335 | const struct lttng_kernel_type_sequence *sequence_type; |
3336 | const struct lttng_kernel_type_common *elem_type; | |
f513b2bf | 3337 | |
437d5aa5 MD |
3338 | sequence_type = lttng_kernel_get_type_sequence(field->type); |
3339 | WARN_ON_ONCE(!sequence_type); | |
f513b2bf | 3340 | |
437d5aa5 | 3341 | length_name = sequence_type->length_name; |
51ef4536 MD |
3342 | if (!length_name) |
3343 | length_name = prev_field_name; | |
3344 | if (!length_name) | |
3345 | return -EINVAL; | |
ceabb767 | 3346 | |
437d5aa5 | 3347 | if (sequence_type->alignment) { |
ceabb767 | 3348 | ret = print_tabs(session, nesting); |
f513b2bf MD |
3349 | if (ret) |
3350 | return ret; | |
ceabb767 MD |
3351 | ret = lttng_metadata_printf(session, |
3352 | "struct { } align(%u) _%s_padding;\n", | |
437d5aa5 | 3353 | sequence_type->alignment * CHAR_BIT, |
ceabb767 MD |
3354 | field->name); |
3355 | if (ret) | |
3356 | return ret; | |
3357 | } | |
3358 | ||
3359 | /* | |
3360 | * Nested compound types: Only array of structures and variants are | |
3361 | * currently supported. | |
3362 | */ | |
437d5aa5 | 3363 | elem_type = sequence_type->elem_type; |
12bb2edb MD |
3364 | switch (elem_type->type) { |
3365 | case lttng_kernel_type_integer: | |
437d5aa5 MD |
3366 | case lttng_kernel_type_struct: |
3367 | case lttng_kernel_type_variant: | |
3368 | ret = _lttng_type_statedump(session, elem_type, | |
3369 | sequence_type->encoding, nesting); | |
65c85aa6 MD |
3370 | if (ret) |
3371 | return ret; | |
3372 | break; | |
ceabb767 | 3373 | |
f513b2bf MD |
3374 | default: |
3375 | return -EINVAL; | |
3376 | } | |
3377 | ret = lttng_metadata_printf(session, | |
3378 | " _%s[ _%s ];\n", | |
3379 | field->name, | |
51ef4536 | 3380 | length_name); |
f513b2bf MD |
3381 | return ret; |
3382 | } | |
3383 | ||
141ddf28 MD |
3384 | /* |
3385 | * Must be called with sessions_mutex held. | |
3386 | */ | |
3387 | static | |
8cdc1a81 | 3388 | int _lttng_enum_type_statedump(struct lttng_kernel_session *session, |
437d5aa5 | 3389 | const struct lttng_kernel_type_enum *type, |
141ddf28 MD |
3390 | size_t nesting) |
3391 | { | |
d96a4a7a | 3392 | const struct lttng_kernel_enum_desc *enum_desc; |
437d5aa5 | 3393 | const struct lttng_kernel_type_common *container_type; |
141ddf28 MD |
3394 | int ret; |
3395 | unsigned int i, nr_entries; | |
3396 | ||
437d5aa5 | 3397 | container_type = type->container_type; |
12bb2edb | 3398 | if (container_type->type != lttng_kernel_type_integer) { |
ceabb767 MD |
3399 | ret = -EINVAL; |
3400 | goto end; | |
3401 | } | |
437d5aa5 | 3402 | enum_desc = type->desc; |
141ddf28 MD |
3403 | nr_entries = enum_desc->nr_entries; |
3404 | ||
3405 | ret = print_tabs(session, nesting); | |
3406 | if (ret) | |
3407 | goto end; | |
ceabb767 MD |
3408 | ret = lttng_metadata_printf(session, "enum : "); |
3409 | if (ret) | |
3410 | goto end; | |
437d5aa5 MD |
3411 | ret = _lttng_integer_type_statedump(session, lttng_kernel_get_type_integer(container_type), |
3412 | lttng_kernel_string_encoding_none, 0); | |
141ddf28 | 3413 | if (ret) |
ceabb767 MD |
3414 | goto end; |
3415 | ret = lttng_metadata_printf(session, " {\n"); | |
3416 | if (ret) | |
3417 | goto end; | |
141ddf28 MD |
3418 | /* Dump all entries */ |
3419 | for (i = 0; i < nr_entries; i++) { | |
437d5aa5 | 3420 | const struct lttng_kernel_enum_entry *entry = enum_desc->entries[i]; |
141ddf28 MD |
3421 | int j, len; |
3422 | ||
3423 | ret = print_tabs(session, nesting + 1); | |
3424 | if (ret) | |
3425 | goto end; | |
3426 | ret = lttng_metadata_printf(session, | |
3427 | "\""); | |
3428 | if (ret) | |
3429 | goto end; | |
3430 | len = strlen(entry->string); | |
3431 | /* Escape the character '"' */ | |
3432 | for (j = 0; j < len; j++) { | |
3433 | char c = entry->string[j]; | |
3434 | ||
3435 | switch (c) { | |
3436 | case '"': | |
3437 | ret = lttng_metadata_printf(session, | |
3438 | "\\\""); | |
3439 | break; | |
3440 | case '\\': | |
3441 | ret = lttng_metadata_printf(session, | |
3442 | "\\\\"); | |
3443 | break; | |
3444 | default: | |
3445 | ret = lttng_metadata_printf(session, | |
3446 | "%c", c); | |
3447 | break; | |
3448 | } | |
3449 | if (ret) | |
3450 | goto end; | |
3451 | } | |
08ad1061 PP |
3452 | ret = lttng_metadata_printf(session, "\""); |
3453 | if (ret) | |
3454 | goto end; | |
3455 | ||
3456 | if (entry->options.is_auto) { | |
3457 | ret = lttng_metadata_printf(session, ",\n"); | |
3458 | if (ret) | |
3459 | goto end; | |
141ddf28 | 3460 | } else { |
7c559490 MD |
3461 | ret = lttng_metadata_printf(session, |
3462 | " = "); | |
3463 | if (ret) | |
3464 | goto end; | |
3465 | if (entry->start.signedness) | |
141ddf28 | 3466 | ret = lttng_metadata_printf(session, |
7c559490 MD |
3467 | "%lld", (long long) entry->start.value); |
3468 | else | |
3469 | ret = lttng_metadata_printf(session, | |
3470 | "%llu", entry->start.value); | |
3471 | if (ret) | |
3472 | goto end; | |
3473 | if (entry->start.signedness == entry->end.signedness && | |
3474 | entry->start.value | |
3475 | == entry->end.value) { | |
141ddf28 | 3476 | ret = lttng_metadata_printf(session, |
7c559490 MD |
3477 | ",\n"); |
3478 | } else { | |
3479 | if (entry->end.signedness) { | |
3480 | ret = lttng_metadata_printf(session, | |
3481 | " ... %lld,\n", | |
3482 | (long long) entry->end.value); | |
3483 | } else { | |
3484 | ret = lttng_metadata_printf(session, | |
3485 | " ... %llu,\n", | |
3486 | entry->end.value); | |
3487 | } | |
141ddf28 | 3488 | } |
7c559490 MD |
3489 | if (ret) |
3490 | goto end; | |
141ddf28 | 3491 | } |
141ddf28 MD |
3492 | } |
3493 | ret = print_tabs(session, nesting); | |
3494 | if (ret) | |
3495 | goto end; | |
ceabb767 | 3496 | ret = lttng_metadata_printf(session, "}"); |
141ddf28 MD |
3497 | end: |
3498 | return ret; | |
3499 | } | |
3500 | ||
d83004aa JD |
3501 | /* |
3502 | * Must be called with sessions_mutex held. | |
3503 | */ | |
c099397a | 3504 | static |
8cdc1a81 | 3505 | int _lttng_enum_field_statedump(struct lttng_kernel_session *session, |
437d5aa5 | 3506 | const struct lttng_kernel_event_field *field, |
ceabb767 MD |
3507 | size_t nesting) |
3508 | { | |
3509 | int ret; | |
437d5aa5 | 3510 | const struct lttng_kernel_type_enum *enum_type; |
ceabb767 | 3511 | |
437d5aa5 MD |
3512 | enum_type = lttng_kernel_get_type_enum(field->type); |
3513 | WARN_ON_ONCE(!enum_type); | |
3514 | ret = _lttng_enum_type_statedump(session, enum_type, nesting); | |
ceabb767 MD |
3515 | if (ret) |
3516 | return ret; | |
3517 | return lttng_field_name_statedump(session, field, nesting); | |
3518 | } | |
3519 | ||
3520 | static | |
8cdc1a81 | 3521 | int _lttng_integer_field_statedump(struct lttng_kernel_session *session, |
437d5aa5 | 3522 | const struct lttng_kernel_event_field *field, |
ceabb767 MD |
3523 | size_t nesting) |
3524 | { | |
3525 | int ret; | |
3526 | ||
437d5aa5 MD |
3527 | ret = _lttng_integer_type_statedump(session, lttng_kernel_get_type_integer(field->type), |
3528 | lttng_kernel_string_encoding_none, nesting); | |
ceabb767 MD |
3529 | if (ret) |
3530 | return ret; | |
3531 | return lttng_field_name_statedump(session, field, nesting); | |
3532 | } | |
3533 | ||
3534 | static | |
8cdc1a81 | 3535 | int _lttng_string_type_statedump(struct lttng_kernel_session *session, |
437d5aa5 | 3536 | const struct lttng_kernel_type_string *type, |
ceabb767 MD |
3537 | size_t nesting) |
3538 | { | |
3539 | int ret; | |
3540 | ||
ceabb767 MD |
3541 | /* Default encoding is UTF8 */ |
3542 | ret = print_tabs(session, nesting); | |
3543 | if (ret) | |
3544 | return ret; | |
3545 | ret = lttng_metadata_printf(session, | |
3546 | "string%s", | |
437d5aa5 | 3547 | type->encoding == lttng_kernel_string_encoding_ASCII ? |
ceabb767 MD |
3548 | " { encoding = ASCII; }" : ""); |
3549 | return ret; | |
3550 | } | |
3551 | ||
3552 | static | |
8cdc1a81 | 3553 | int _lttng_string_field_statedump(struct lttng_kernel_session *session, |
437d5aa5 | 3554 | const struct lttng_kernel_event_field *field, |
f513b2bf | 3555 | size_t nesting) |
ceabb767 | 3556 | { |
437d5aa5 | 3557 | const struct lttng_kernel_type_string *string_type; |
ceabb767 MD |
3558 | int ret; |
3559 | ||
437d5aa5 MD |
3560 | string_type = lttng_kernel_get_type_string(field->type); |
3561 | WARN_ON_ONCE(!string_type); | |
3562 | ret = _lttng_string_type_statedump(session, string_type, nesting); | |
ceabb767 MD |
3563 | if (ret) |
3564 | return ret; | |
3565 | return lttng_field_name_statedump(session, field, nesting); | |
3566 | } | |
3567 | ||
3568 | /* | |
3569 | * Must be called with sessions_mutex held. | |
3570 | */ | |
3571 | static | |
8cdc1a81 | 3572 | int _lttng_type_statedump(struct lttng_kernel_session *session, |
437d5aa5 MD |
3573 | const struct lttng_kernel_type_common *type, |
3574 | enum lttng_kernel_string_encoding parent_encoding, | |
ceabb767 | 3575 | size_t nesting) |
c099397a | 3576 | { |
c099397a | 3577 | int ret = 0; |
c099397a | 3578 | |
12bb2edb MD |
3579 | switch (type->type) { |
3580 | case lttng_kernel_type_integer: | |
437d5aa5 MD |
3581 | ret = _lttng_integer_type_statedump(session, |
3582 | lttng_kernel_get_type_integer(type), | |
3583 | parent_encoding, nesting); | |
8070f5c0 | 3584 | break; |
437d5aa5 MD |
3585 | case lttng_kernel_type_enum: |
3586 | ret = _lttng_enum_type_statedump(session, | |
3587 | lttng_kernel_get_type_enum(type), | |
3588 | nesting); | |
8070f5c0 | 3589 | break; |
12bb2edb | 3590 | case lttng_kernel_type_string: |
437d5aa5 MD |
3591 | ret = _lttng_string_type_statedump(session, |
3592 | lttng_kernel_get_type_string(type), | |
3593 | nesting); | |
ceabb767 | 3594 | break; |
437d5aa5 MD |
3595 | case lttng_kernel_type_struct: |
3596 | ret = _lttng_struct_type_statedump(session, | |
3597 | lttng_kernel_get_type_struct(type), | |
3598 | nesting); | |
8070f5c0 | 3599 | break; |
437d5aa5 MD |
3600 | case lttng_kernel_type_variant: |
3601 | ret = _lttng_variant_type_statedump(session, | |
3602 | lttng_kernel_get_type_variant(type), | |
51ef4536 | 3603 | nesting, NULL); |
ceabb767 MD |
3604 | break; |
3605 | ||
3606 | /* Nested arrays and sequences are not supported yet. */ | |
437d5aa5 MD |
3607 | case lttng_kernel_type_array: |
3608 | case lttng_kernel_type_sequence: | |
ceabb767 MD |
3609 | default: |
3610 | WARN_ON_ONCE(1); | |
3611 | return -EINVAL; | |
8070f5c0 | 3612 | } |
ceabb767 MD |
3613 | return ret; |
3614 | } | |
8070f5c0 | 3615 | |
ceabb767 MD |
3616 | /* |
3617 | * Must be called with sessions_mutex held. | |
3618 | */ | |
3619 | static | |
8cdc1a81 | 3620 | int _lttng_field_statedump(struct lttng_kernel_session *session, |
437d5aa5 | 3621 | const struct lttng_kernel_event_field *field, |
51ef4536 MD |
3622 | size_t nesting, |
3623 | const char **prev_field_name_p) | |
ceabb767 | 3624 | { |
51ef4536 | 3625 | const char *prev_field_name = NULL; |
ceabb767 | 3626 | int ret = 0; |
27d2368e | 3627 | |
51ef4536 MD |
3628 | if (prev_field_name_p) |
3629 | prev_field_name = *prev_field_name_p; | |
437d5aa5 | 3630 | switch (field->type->type) { |
12bb2edb | 3631 | case lttng_kernel_type_integer: |
ceabb767 MD |
3632 | ret = _lttng_integer_field_statedump(session, field, nesting); |
3633 | break; | |
437d5aa5 | 3634 | case lttng_kernel_type_enum: |
ceabb767 | 3635 | ret = _lttng_enum_field_statedump(session, field, nesting); |
8070f5c0 | 3636 | break; |
12bb2edb | 3637 | case lttng_kernel_type_string: |
ceabb767 | 3638 | ret = _lttng_string_field_statedump(session, field, nesting); |
8070f5c0 | 3639 | break; |
437d5aa5 | 3640 | case lttng_kernel_type_struct: |
ceabb767 | 3641 | ret = _lttng_struct_field_statedump(session, field, nesting); |
f513b2bf | 3642 | break; |
437d5aa5 | 3643 | case lttng_kernel_type_array: |
ceabb767 | 3644 | ret = _lttng_array_field_statedump(session, field, nesting); |
f513b2bf | 3645 | break; |
437d5aa5 | 3646 | case lttng_kernel_type_sequence: |
51ef4536 | 3647 | ret = _lttng_sequence_field_statedump(session, field, nesting, prev_field_name); |
f513b2bf | 3648 | break; |
437d5aa5 | 3649 | case lttng_kernel_type_variant: |
51ef4536 | 3650 | ret = _lttng_variant_field_statedump(session, field, nesting, prev_field_name); |
65c85aa6 | 3651 | break; |
f513b2bf | 3652 | |
8070f5c0 MD |
3653 | default: |
3654 | WARN_ON_ONCE(1); | |
3655 | return -EINVAL; | |
3656 | } | |
51ef4536 MD |
3657 | if (prev_field_name_p) |
3658 | *prev_field_name_p = field->name; | |
8070f5c0 MD |
3659 | return ret; |
3660 | } | |
3661 | ||
3662 | static | |
8cdc1a81 | 3663 | int _lttng_context_metadata_statedump(struct lttng_kernel_session *session, |
437d5aa5 | 3664 | struct lttng_kernel_ctx *ctx) |
8070f5c0 | 3665 | { |
51ef4536 | 3666 | const char *prev_field_name = NULL; |
8070f5c0 MD |
3667 | int ret = 0; |
3668 | int i; | |
3669 | ||
3670 | if (!ctx) | |
3671 | return 0; | |
3672 | for (i = 0; i < ctx->nr_fields; i++) { | |
437d5aa5 | 3673 | const struct lttng_kernel_ctx_field *field = &ctx->fields[i]; |
8070f5c0 | 3674 | |
51ef4536 | 3675 | ret = _lttng_field_statedump(session, field->event_field, 2, &prev_field_name); |
8070f5c0 MD |
3676 | if (ret) |
3677 | return ret; | |
3678 | } | |
3679 | return ret; | |
3680 | } | |
3681 | ||
3682 | static | |
8cdc1a81 | 3683 | int _lttng_fields_metadata_statedump(struct lttng_kernel_session *session, |
a67ba386 | 3684 | struct lttng_kernel_event_recorder *event_recorder) |
8070f5c0 | 3685 | { |
51ef4536 | 3686 | const char *prev_field_name = NULL; |
a67ba386 | 3687 | const struct lttng_kernel_event_desc *desc = event_recorder->priv->parent.desc; |
8070f5c0 MD |
3688 | int ret = 0; |
3689 | int i; | |
3690 | ||
6c8c025b MD |
3691 | for (i = 0; i < desc->tp_class->nr_fields; i++) { |
3692 | const struct lttng_kernel_event_field *field = desc->tp_class->fields[i]; | |
8070f5c0 | 3693 | |
51ef4536 | 3694 | ret = _lttng_field_statedump(session, field, 2, &prev_field_name); |
8070f5c0 MD |
3695 | if (ret) |
3696 | return ret; | |
c099397a MD |
3697 | } |
3698 | return ret; | |
3699 | } | |
3700 | ||
d83004aa JD |
3701 | /* |
3702 | * Must be called with sessions_mutex held. | |
8b97fd42 MD |
3703 | * The entire event metadata is printed as a single atomic metadata |
3704 | * transaction. | |
d83004aa | 3705 | */ |
c099397a | 3706 | static |
8cdc1a81 | 3707 | int _lttng_event_metadata_statedump(struct lttng_kernel_session *session, |
f7d06400 | 3708 | struct lttng_kernel_channel_buffer *chan, |
a67ba386 | 3709 | struct lttng_kernel_event_recorder *event_recorder) |
c099397a MD |
3710 | { |
3711 | int ret = 0; | |
3712 | ||
a67ba386 | 3713 | if (event_recorder->priv->metadata_dumped || !LTTNG_READ_ONCE(session->active)) |
c099397a | 3714 | return 0; |
f7d06400 | 3715 | if (chan->priv->channel_type == METADATA_CHANNEL) |
c099397a MD |
3716 | return 0; |
3717 | ||
8b97fd42 MD |
3718 | lttng_metadata_begin(session); |
3719 | ||
c099397a MD |
3720 | ret = lttng_metadata_printf(session, |
3721 | "event {\n" | |
ae734547 | 3722 | " name = \"%s\";\n" |
c099397a | 3723 | " id = %u;\n" |
b9074a1b | 3724 | " stream_id = %u;\n", |
a67ba386 MD |
3725 | event_recorder->priv->parent.desc->event_name, |
3726 | event_recorder->priv->id, | |
f7d06400 | 3727 | event_recorder->chan->priv->id); |
c099397a MD |
3728 | if (ret) |
3729 | goto end; | |
3730 | ||
8070f5c0 | 3731 | ret = lttng_metadata_printf(session, |
8070f5c0 MD |
3732 | " fields := struct {\n" |
3733 | ); | |
3734 | if (ret) | |
3735 | goto end; | |
3736 | ||
a67ba386 | 3737 | ret = _lttng_fields_metadata_statedump(session, event_recorder); |
c099397a MD |
3738 | if (ret) |
3739 | goto end; | |
3740 | ||
3741 | /* | |
3742 | * LTTng space reservation can only reserve multiples of the | |
3743 | * byte size. | |
3744 | */ | |
3745 | ret = lttng_metadata_printf(session, | |
9115fbdc MD |
3746 | " };\n" |
3747 | "};\n\n"); | |
c099397a MD |
3748 | if (ret) |
3749 | goto end; | |
3750 | ||
a67ba386 | 3751 | event_recorder->priv->metadata_dumped = 1; |
c099397a | 3752 | end: |
8b97fd42 | 3753 | lttng_metadata_end(session); |
c099397a MD |
3754 | return ret; |
3755 | ||
3756 | } | |
3757 | ||
d83004aa JD |
3758 | /* |
3759 | * Must be called with sessions_mutex held. | |
8b97fd42 MD |
3760 | * The entire channel metadata is printed as a single atomic metadata |
3761 | * transaction. | |
d83004aa | 3762 | */ |
c099397a | 3763 | static |
8cdc1a81 | 3764 | int _lttng_channel_metadata_statedump(struct lttng_kernel_session *session, |
f7d06400 | 3765 | struct lttng_kernel_channel_buffer *chan) |
c099397a MD |
3766 | { |
3767 | int ret = 0; | |
3768 | ||
f7d06400 | 3769 | if (chan->priv->metadata_dumped || !LTTNG_READ_ONCE(session->active)) |
c099397a | 3770 | return 0; |
d83004aa | 3771 | |
f7d06400 | 3772 | if (chan->priv->channel_type == METADATA_CHANNEL) |
c099397a MD |
3773 | return 0; |
3774 | ||
8b97fd42 MD |
3775 | lttng_metadata_begin(session); |
3776 | ||
f7d06400 | 3777 | WARN_ON_ONCE(!chan->priv->header_type); |
c099397a MD |
3778 | ret = lttng_metadata_printf(session, |
3779 | "stream {\n" | |
3780 | " id = %u;\n" | |
9115fbdc | 3781 | " event.header := %s;\n" |
b9074a1b | 3782 | " packet.context := struct packet_context;\n", |
f7d06400 MD |
3783 | chan->priv->id, |
3784 | chan->priv->header_type == 1 ? "struct event_header_compact" : | |
c099397a MD |
3785 | "struct event_header_large"); |
3786 | if (ret) | |
3787 | goto end; | |
3788 | ||
f7d06400 | 3789 | if (chan->priv->ctx) { |
b9074a1b MD |
3790 | ret = lttng_metadata_printf(session, |
3791 | " event.context := struct {\n"); | |
3792 | if (ret) | |
3793 | goto end; | |
3794 | } | |
f7d06400 | 3795 | ret = _lttng_context_metadata_statedump(session, chan->priv->ctx); |
8070f5c0 MD |
3796 | if (ret) |
3797 | goto end; | |
f7d06400 | 3798 | if (chan->priv->ctx) { |
b9074a1b MD |
3799 | ret = lttng_metadata_printf(session, |
3800 | " };\n"); | |
3801 | if (ret) | |
3802 | goto end; | |
3803 | } | |
8070f5c0 MD |
3804 | |
3805 | ret = lttng_metadata_printf(session, | |
b9074a1b | 3806 | "};\n\n"); |
8070f5c0 | 3807 | |
f7d06400 | 3808 | chan->priv->metadata_dumped = 1; |
c099397a | 3809 | end: |
8b97fd42 | 3810 | lttng_metadata_end(session); |
c099397a MD |
3811 | return ret; |
3812 | } | |
3813 | ||
d83004aa JD |
3814 | /* |
3815 | * Must be called with sessions_mutex held. | |
3816 | */ | |
9115fbdc | 3817 | static |
8cdc1a81 | 3818 | int _lttng_stream_packet_context_declare(struct lttng_kernel_session *session) |
9115fbdc MD |
3819 | { |
3820 | return lttng_metadata_printf(session, | |
3821 | "struct packet_context {\n" | |
a3ccff4f MD |
3822 | " uint64_clock_monotonic_t timestamp_begin;\n" |
3823 | " uint64_clock_monotonic_t timestamp_end;\n" | |
576ca06a MD |
3824 | " uint64_t content_size;\n" |
3825 | " uint64_t packet_size;\n" | |
5b3cf4f9 | 3826 | " uint64_t packet_seq_num;\n" |
a9afe705 | 3827 | " unsigned long events_discarded;\n" |
9115fbdc | 3828 | " uint32_t cpu_id;\n" |
c6dfdf6f | 3829 | "};\n\n" |
9115fbdc MD |
3830 | ); |
3831 | } | |
3832 | ||
3833 | /* | |
3834 | * Compact header: | |
3835 | * id: range: 0 - 30. | |
3836 | * id 31 is reserved to indicate an extended header. | |
3837 | * | |
3838 | * Large header: | |
3839 | * id: range: 0 - 65534. | |
3840 | * id 65535 is reserved to indicate an extended header. | |
d83004aa JD |
3841 | * |
3842 | * Must be called with sessions_mutex held. | |
9115fbdc MD |
3843 | */ |
3844 | static | |
8cdc1a81 | 3845 | int _lttng_event_header_declare(struct lttng_kernel_session *session) |
9115fbdc MD |
3846 | { |
3847 | return lttng_metadata_printf(session, | |
3848 | "struct event_header_compact {\n" | |
3849 | " enum : uint5_t { compact = 0 ... 30, extended = 31 } id;\n" | |
3850 | " variant <id> {\n" | |
3851 | " struct {\n" | |
a3ccff4f | 3852 | " uint27_clock_monotonic_t timestamp;\n" |
9115fbdc MD |
3853 | " } compact;\n" |
3854 | " struct {\n" | |
3855 | " uint32_t id;\n" | |
a3ccff4f | 3856 | " uint64_clock_monotonic_t timestamp;\n" |
9115fbdc MD |
3857 | " } extended;\n" |
3858 | " } v;\n" | |
3859 | "} align(%u);\n" | |
3860 | "\n" | |
3861 | "struct event_header_large {\n" | |
3862 | " enum : uint16_t { compact = 0 ... 65534, extended = 65535 } id;\n" | |
3863 | " variant <id> {\n" | |
3864 | " struct {\n" | |
a3ccff4f | 3865 | " uint32_clock_monotonic_t timestamp;\n" |
9115fbdc MD |
3866 | " } compact;\n" |
3867 | " struct {\n" | |
3868 | " uint32_t id;\n" | |
a3ccff4f | 3869 | " uint64_clock_monotonic_t timestamp;\n" |
9115fbdc MD |
3870 | " } extended;\n" |
3871 | " } v;\n" | |
3872 | "} align(%u);\n\n", | |
a90917c3 MD |
3873 | lttng_alignof(uint32_t) * CHAR_BIT, |
3874 | lttng_alignof(uint16_t) * CHAR_BIT | |
9115fbdc MD |
3875 | ); |
3876 | } | |
3877 | ||
a3ccff4f MD |
3878 | /* |
3879 | * Approximation of NTP time of day to clock monotonic correlation, | |
3880 | * taken at start of trace. | |
3881 | * Yes, this is only an approximation. Yes, we can (and will) do better | |
3882 | * in future versions. | |
5283350b MD |
3883 | * This function may return a negative offset. It may happen if the |
3884 | * system sets the REALTIME clock to 0 after boot. | |
3636085f MJ |
3885 | * |
3886 | * Use 64bit timespec on kernels that have it, this makes 32bit arch | |
3887 | * y2038 compliant. | |
a3ccff4f MD |
3888 | */ |
3889 | static | |
8967b2a3 | 3890 | int64_t measure_clock_offset(void) |
a3ccff4f | 3891 | { |
dcb93448 | 3892 | uint64_t monotonic_avg, monotonic[2], realtime; |
2754583e | 3893 | uint64_t tcf = trace_clock_freq(); |
dcb93448 | 3894 | int64_t offset; |
a3ccff4f | 3895 | unsigned long flags; |
3636085f MJ |
3896 | #ifdef LTTNG_KERNEL_HAS_TIMESPEC64 |
3897 | struct timespec64 rts = { 0, 0 }; | |
3898 | #else | |
3899 | struct timespec rts = { 0, 0 }; | |
3900 | #endif | |
a3ccff4f MD |
3901 | |
3902 | /* Disable interrupts to increase correlation precision. */ | |
3903 | local_irq_save(flags); | |
3904 | monotonic[0] = trace_clock_read64(); | |
3636085f MJ |
3905 | #ifdef LTTNG_KERNEL_HAS_TIMESPEC64 |
3906 | ktime_get_real_ts64(&rts); | |
3907 | #else | |
216b6baa | 3908 | getnstimeofday(&rts); |
3636085f | 3909 | #endif |
a3ccff4f MD |
3910 | monotonic[1] = trace_clock_read64(); |
3911 | local_irq_restore(flags); | |
3912 | ||
dcb93448 | 3913 | monotonic_avg = (monotonic[0] + monotonic[1]) >> 1; |
2754583e MD |
3914 | realtime = (uint64_t) rts.tv_sec * tcf; |
3915 | if (tcf == NSEC_PER_SEC) { | |
3916 | realtime += rts.tv_nsec; | |
3917 | } else { | |
3918 | uint64_t n = rts.tv_nsec * tcf; | |
3919 | ||
3920 | do_div(n, NSEC_PER_SEC); | |
3921 | realtime += n; | |
3922 | } | |
dcb93448 | 3923 | offset = (int64_t) realtime - monotonic_avg; |
a3ccff4f MD |
3924 | return offset; |
3925 | } | |
3926 | ||
3eb95be4 | 3927 | static |
8cdc1a81 | 3928 | int print_escaped_ctf_string(struct lttng_kernel_session *session, const char *string) |
3eb95be4 | 3929 | { |
0f3eaad4 | 3930 | int ret = 0; |
3eb95be4 JR |
3931 | size_t i; |
3932 | char cur; | |
3933 | ||
3934 | i = 0; | |
3935 | cur = string[i]; | |
3936 | while (cur != '\0') { | |
3937 | switch (cur) { | |
3938 | case '\n': | |
3939 | ret = lttng_metadata_printf(session, "%s", "\\n"); | |
3940 | break; | |
3941 | case '\\': | |
3942 | case '"': | |
3943 | ret = lttng_metadata_printf(session, "%c", '\\'); | |
3944 | if (ret) | |
3945 | goto error; | |
3946 | /* We still print the current char */ | |
c190d76e | 3947 | lttng_fallthrough; |
3eb95be4 JR |
3948 | default: |
3949 | ret = lttng_metadata_printf(session, "%c", cur); | |
3950 | break; | |
3951 | } | |
3952 | ||
3953 | if (ret) | |
3954 | goto error; | |
3955 | ||
3956 | cur = string[++i]; | |
3957 | } | |
3958 | error: | |
3959 | return ret; | |
3960 | } | |
3961 | ||
3962 | static | |
8cdc1a81 | 3963 | int print_metadata_escaped_field(struct lttng_kernel_session *session, const char *field, |
1c88f269 | 3964 | const char *field_value) |
3eb95be4 JR |
3965 | { |
3966 | int ret; | |
3967 | ||
1c88f269 | 3968 | ret = lttng_metadata_printf(session, " %s = \"", field); |
3eb95be4 JR |
3969 | if (ret) |
3970 | goto error; | |
3971 | ||
1c88f269 | 3972 | ret = print_escaped_ctf_string(session, field_value); |
3eb95be4 JR |
3973 | if (ret) |
3974 | goto error; | |
3975 | ||
3976 | ret = lttng_metadata_printf(session, "\";\n"); | |
3977 | ||
3978 | error: | |
3979 | return ret; | |
3980 | } | |
3981 | ||
c099397a MD |
3982 | /* |
3983 | * Output metadata into this session's metadata buffers. | |
d83004aa | 3984 | * Must be called with sessions_mutex held. |
c099397a MD |
3985 | */ |
3986 | static | |
8cdc1a81 | 3987 | int _lttng_session_metadata_statedump(struct lttng_kernel_session *session) |
c099397a | 3988 | { |
8cdc1a81 | 3989 | unsigned char *uuid_c = session->priv->uuid.b; |
a82c63f1 | 3990 | unsigned char uuid_s[37], clock_uuid_s[BOOT_ID_LEN]; |
c88f762e | 3991 | const char *product_uuid; |
f7d06400 | 3992 | struct lttng_kernel_channel_buffer_private *chan_priv; |
a67ba386 | 3993 | struct lttng_kernel_event_recorder_private *event_recorder_priv; |
c099397a MD |
3994 | int ret = 0; |
3995 | ||
585e5dcc | 3996 | if (!LTTNG_READ_ONCE(session->active)) |
c099397a | 3997 | return 0; |
8b97fd42 MD |
3998 | |
3999 | lttng_metadata_begin(session); | |
4000 | ||
8cdc1a81 | 4001 | if (session->priv->metadata_dumped) |
c099397a | 4002 | goto skip_session; |
c099397a | 4003 | |
d793d5e1 | 4004 | snprintf(uuid_s, sizeof(uuid_s), |
30bdb6e4 MD |
4005 | "%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x", |
4006 | uuid_c[0], uuid_c[1], uuid_c[2], uuid_c[3], | |
4007 | uuid_c[4], uuid_c[5], uuid_c[6], uuid_c[7], | |
4008 | uuid_c[8], uuid_c[9], uuid_c[10], uuid_c[11], | |
4009 | uuid_c[12], uuid_c[13], uuid_c[14], uuid_c[15]); | |
d793d5e1 MD |
4010 | |
4011 | ret = lttng_metadata_printf(session, | |
9115fbdc MD |
4012 | "typealias integer { size = 8; align = %u; signed = false; } := uint8_t;\n" |
4013 | "typealias integer { size = 16; align = %u; signed = false; } := uint16_t;\n" | |
4014 | "typealias integer { size = 32; align = %u; signed = false; } := uint32_t;\n" | |
4015 | "typealias integer { size = 64; align = %u; signed = false; } := uint64_t;\n" | |
a9afe705 | 4016 | "typealias integer { size = %u; align = %u; signed = false; } := unsigned long;\n" |
9115fbdc MD |
4017 | "typealias integer { size = 5; align = 1; signed = false; } := uint5_t;\n" |
4018 | "typealias integer { size = 27; align = 1; signed = false; } := uint27_t;\n" | |
d793d5e1 MD |
4019 | "\n" |
4020 | "trace {\n" | |
4021 | " major = %u;\n" | |
4022 | " minor = %u;\n" | |
30bdb6e4 | 4023 | " uuid = \"%s\";\n" |
d793d5e1 MD |
4024 | " byte_order = %s;\n" |
4025 | " packet.header := struct {\n" | |
4026 | " uint32_t magic;\n" | |
1ec3f75a | 4027 | " uint8_t uuid[16];\n" |
d793d5e1 | 4028 | " uint32_t stream_id;\n" |
5594698f | 4029 | " uint64_t stream_instance_id;\n" |
0eb25f58 | 4030 | " };\n" |
d793d5e1 | 4031 | "};\n\n", |
a90917c3 MD |
4032 | lttng_alignof(uint8_t) * CHAR_BIT, |
4033 | lttng_alignof(uint16_t) * CHAR_BIT, | |
4034 | lttng_alignof(uint32_t) * CHAR_BIT, | |
4035 | lttng_alignof(uint64_t) * CHAR_BIT, | |
a9afe705 MD |
4036 | sizeof(unsigned long) * CHAR_BIT, |
4037 | lttng_alignof(unsigned long) * CHAR_BIT, | |
c6c9e10f MD |
4038 | CTF_SPEC_MAJOR, |
4039 | CTF_SPEC_MINOR, | |
d793d5e1 | 4040 | uuid_s, |
5214fa50 | 4041 | #if __BYTE_ORDER == __BIG_ENDIAN |
d793d5e1 MD |
4042 | "be" |
4043 | #else | |
4044 | "le" | |
4045 | #endif | |
4046 | ); | |
4047 | if (ret) | |
4048 | goto end; | |
4049 | ||
99dc9597 MD |
4050 | ret = lttng_metadata_printf(session, |
4051 | "env {\n" | |
a6058143 | 4052 | " hostname = \"%s\";\n" |
c6c9e10f | 4053 | " domain = \"kernel\";\n" |
99dc9597 | 4054 | " sysname = \"%s\";\n" |
c6c9e10f MD |
4055 | " kernel_release = \"%s\";\n" |
4056 | " kernel_version = \"%s\";\n" | |
4057 | " tracer_name = \"lttng-modules\";\n" | |
4058 | " tracer_major = %d;\n" | |
4059 | " tracer_minor = %d;\n" | |
4060 | " tracer_patchlevel = %d;\n" | |
3eb95be4 | 4061 | " trace_buffering_scheme = \"global\";\n", |
3d0d43db | 4062 | current->nsproxy->uts_ns->name.nodename, |
99dc9597 MD |
4063 | utsname()->sysname, |
4064 | utsname()->release, | |
c6c9e10f MD |
4065 | utsname()->version, |
4066 | LTTNG_MODULES_MAJOR_VERSION, | |
4067 | LTTNG_MODULES_MINOR_VERSION, | |
4068 | LTTNG_MODULES_PATCHLEVEL_VERSION | |
99dc9597 MD |
4069 | ); |
4070 | if (ret) | |
4071 | goto end; | |
4072 | ||
8cdc1a81 | 4073 | ret = print_metadata_escaped_field(session, "trace_name", session->priv->name); |
1c88f269 JR |
4074 | if (ret) |
4075 | goto end; | |
4076 | ret = print_metadata_escaped_field(session, "trace_creation_datetime", | |
8cdc1a81 | 4077 | session->priv->creation_time); |
3eb95be4 JR |
4078 | if (ret) |
4079 | goto end; | |
4080 | ||
c88f762e GB |
4081 | /* Add the product UUID to the 'env' section */ |
4082 | product_uuid = dmi_get_system_info(DMI_PRODUCT_UUID); | |
4083 | if (product_uuid) { | |
4084 | ret = lttng_metadata_printf(session, | |
4085 | " product_uuid = \"%s\";\n", | |
4086 | product_uuid | |
4087 | ); | |
4088 | if (ret) | |
4089 | goto end; | |
4090 | } | |
4091 | ||
4092 | /* Close the 'env' section */ | |
3eb95be4 JR |
4093 | ret = lttng_metadata_printf(session, "};\n\n"); |
4094 | if (ret) | |
4095 | goto end; | |
4096 | ||
a3ccff4f MD |
4097 | ret = lttng_metadata_printf(session, |
4098 | "clock {\n" | |
2754583e MD |
4099 | " name = \"%s\";\n", |
4100 | trace_clock_name() | |
a82c63f1 MD |
4101 | ); |
4102 | if (ret) | |
4103 | goto end; | |
4104 | ||
4105 | if (!trace_clock_uuid(clock_uuid_s)) { | |
4106 | ret = lttng_metadata_printf(session, | |
7c27cb17 | 4107 | " uuid = \"%s\";\n", |
a82c63f1 MD |
4108 | clock_uuid_s |
4109 | ); | |
4110 | if (ret) | |
4111 | goto end; | |
4112 | } | |
4113 | ||
4114 | ret = lttng_metadata_printf(session, | |
2754583e | 4115 | " description = \"%s\";\n" |
a3ccff4f MD |
4116 | " freq = %llu; /* Frequency, in Hz */\n" |
4117 | " /* clock value offset from Epoch is: offset * (1/freq) */\n" | |
8967b2a3 | 4118 | " offset = %lld;\n" |
a3ccff4f | 4119 | "};\n\n", |
2754583e | 4120 | trace_clock_description(), |
a3ccff4f | 4121 | (unsigned long long) trace_clock_freq(), |
8967b2a3 | 4122 | (long long) measure_clock_offset() |
a3ccff4f MD |
4123 | ); |
4124 | if (ret) | |
4125 | goto end; | |
4126 | ||
4127 | ret = lttng_metadata_printf(session, | |
4128 | "typealias integer {\n" | |
4129 | " size = 27; align = 1; signed = false;\n" | |
2754583e | 4130 | " map = clock.%s.value;\n" |
a3ccff4f MD |
4131 | "} := uint27_clock_monotonic_t;\n" |
4132 | "\n" | |
4133 | "typealias integer {\n" | |
4134 | " size = 32; align = %u; signed = false;\n" | |
2754583e | 4135 | " map = clock.%s.value;\n" |
a3ccff4f MD |
4136 | "} := uint32_clock_monotonic_t;\n" |
4137 | "\n" | |
4138 | "typealias integer {\n" | |
4139 | " size = 64; align = %u; signed = false;\n" | |
2754583e | 4140 | " map = clock.%s.value;\n" |
a3ccff4f | 4141 | "} := uint64_clock_monotonic_t;\n\n", |
2754583e | 4142 | trace_clock_name(), |
a3ccff4f | 4143 | lttng_alignof(uint32_t) * CHAR_BIT, |
2754583e MD |
4144 | trace_clock_name(), |
4145 | lttng_alignof(uint64_t) * CHAR_BIT, | |
4146 | trace_clock_name() | |
a3ccff4f MD |
4147 | ); |
4148 | if (ret) | |
4149 | goto end; | |
4150 | ||
a90917c3 | 4151 | ret = _lttng_stream_packet_context_declare(session); |
9115fbdc MD |
4152 | if (ret) |
4153 | goto end; | |
4154 | ||
a90917c3 | 4155 | ret = _lttng_event_header_declare(session); |
9115fbdc MD |
4156 | if (ret) |
4157 | goto end; | |
4158 | ||
c099397a | 4159 | skip_session: |
f7d06400 MD |
4160 | list_for_each_entry(chan_priv, &session->priv->chan, node) { |
4161 | ret = _lttng_channel_metadata_statedump(session, chan_priv->pub); | |
c099397a MD |
4162 | if (ret) |
4163 | goto end; | |
4164 | } | |
4165 | ||
8cdc1a81 | 4166 | list_for_each_entry(event_recorder_priv, &session->priv->events, node) { |
a67ba386 MD |
4167 | ret = _lttng_event_metadata_statedump(session, event_recorder_priv->pub->chan, |
4168 | event_recorder_priv->pub); | |
c099397a MD |
4169 | if (ret) |
4170 | goto end; | |
4171 | } | |
8cdc1a81 | 4172 | session->priv->metadata_dumped = 1; |
c099397a | 4173 | end: |
8b97fd42 | 4174 | lttng_metadata_end(session); |
c099397a MD |
4175 | return ret; |
4176 | } | |
4177 | ||
c0e31d2e | 4178 | /** |
a90917c3 | 4179 | * lttng_transport_register - LTT transport registration |
c0e31d2e MD |
4180 | * @transport: transport structure |
4181 | * | |
4182 | * Registers a transport which can be used as output to extract the data out of | |
4183 | * LTTng. The module calling this registration function must ensure that no | |
4184 | * trap-inducing code will be executed by the transport functions. E.g. | |
263b6c88 | 4185 | * vmalloc_sync_mappings() must be called between a vmalloc and the moment the memory |
c0e31d2e | 4186 | * is made visible to the transport function. This registration acts as a |
263b6c88 | 4187 | * vmalloc_sync_mappings. Therefore, only if the module allocates virtual memory |
c0e31d2e MD |
4188 | * after its registration must it synchronize the TLBs. |
4189 | */ | |
a90917c3 | 4190 | void lttng_transport_register(struct lttng_transport *transport) |
c0e31d2e MD |
4191 | { |
4192 | /* | |
4193 | * Make sure no page fault can be triggered by the module about to be | |
4194 | * registered. We deal with this here so we don't have to call | |
263b6c88 | 4195 | * vmalloc_sync_mappings() in each module's init. |
c0e31d2e | 4196 | */ |
263b6c88 | 4197 | wrapper_vmalloc_sync_mappings(); |
c0e31d2e MD |
4198 | |
4199 | mutex_lock(&sessions_mutex); | |
a90917c3 | 4200 | list_add_tail(&transport->node, <tng_transport_list); |
c0e31d2e MD |
4201 | mutex_unlock(&sessions_mutex); |
4202 | } | |
a90917c3 | 4203 | EXPORT_SYMBOL_GPL(lttng_transport_register); |
c0e31d2e MD |
4204 | |
4205 | /** | |
a90917c3 | 4206 | * lttng_transport_unregister - LTT transport unregistration |
c0e31d2e MD |
4207 | * @transport: transport structure |
4208 | */ | |
a90917c3 | 4209 | void lttng_transport_unregister(struct lttng_transport *transport) |
c0e31d2e MD |
4210 | { |
4211 | mutex_lock(&sessions_mutex); | |
4212 | list_del(&transport->node); | |
4213 | mutex_unlock(&sessions_mutex); | |
4214 | } | |
a90917c3 | 4215 | EXPORT_SYMBOL_GPL(lttng_transport_unregister); |
c0e31d2e | 4216 | |
a101fa10 MD |
4217 | void lttng_counter_transport_register(struct lttng_counter_transport *transport) |
4218 | { | |
4219 | /* | |
4220 | * Make sure no page fault can be triggered by the module about to be | |
4221 | * registered. We deal with this here so we don't have to call | |
4222 | * vmalloc_sync_mappings() in each module's init. | |
4223 | */ | |
4224 | wrapper_vmalloc_sync_mappings(); | |
4225 | ||
4226 | mutex_lock(&sessions_mutex); | |
4227 | list_add_tail(&transport->node, <tng_counter_transport_list); | |
4228 | mutex_unlock(&sessions_mutex); | |
4229 | } | |
4230 | EXPORT_SYMBOL_GPL(lttng_counter_transport_register); | |
4231 | ||
4232 | void lttng_counter_transport_unregister(struct lttng_counter_transport *transport) | |
4233 | { | |
4234 | mutex_lock(&sessions_mutex); | |
4235 | list_del(&transport->node); | |
4236 | mutex_unlock(&sessions_mutex); | |
4237 | } | |
4238 | EXPORT_SYMBOL_GPL(lttng_counter_transport_unregister); | |
4239 | ||
5f4c791e | 4240 | #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,10,0)) |
1e367326 MD |
4241 | |
4242 | enum cpuhp_state lttng_hp_prepare; | |
4243 | enum cpuhp_state lttng_hp_online; | |
4244 | ||
4245 | static int lttng_hotplug_prepare(unsigned int cpu, struct hlist_node *node) | |
4246 | { | |
4247 | struct lttng_cpuhp_node *lttng_node; | |
4248 | ||
4249 | lttng_node = container_of(node, struct lttng_cpuhp_node, node); | |
4250 | switch (lttng_node->component) { | |
4251 | case LTTNG_RING_BUFFER_FRONTEND: | |
4252 | return 0; | |
4253 | case LTTNG_RING_BUFFER_BACKEND: | |
4254 | return lttng_cpuhp_rb_backend_prepare(cpu, lttng_node); | |
4255 | case LTTNG_RING_BUFFER_ITER: | |
4256 | return 0; | |
4257 | case LTTNG_CONTEXT_PERF_COUNTERS: | |
4258 | return 0; | |
4259 | default: | |
4260 | return -EINVAL; | |
4261 | } | |
4262 | } | |
4263 | ||
4264 | static int lttng_hotplug_dead(unsigned int cpu, struct hlist_node *node) | |
4265 | { | |
4266 | struct lttng_cpuhp_node *lttng_node; | |
4267 | ||
4268 | lttng_node = container_of(node, struct lttng_cpuhp_node, node); | |
4269 | switch (lttng_node->component) { | |
4270 | case LTTNG_RING_BUFFER_FRONTEND: | |
4271 | return lttng_cpuhp_rb_frontend_dead(cpu, lttng_node); | |
4272 | case LTTNG_RING_BUFFER_BACKEND: | |
4273 | return 0; | |
4274 | case LTTNG_RING_BUFFER_ITER: | |
4275 | return 0; | |
4276 | case LTTNG_CONTEXT_PERF_COUNTERS: | |
4277 | return lttng_cpuhp_perf_counter_dead(cpu, lttng_node); | |
4278 | default: | |
4279 | return -EINVAL; | |
4280 | } | |
4281 | } | |
4282 | ||
4283 | static int lttng_hotplug_online(unsigned int cpu, struct hlist_node *node) | |
4284 | { | |
4285 | struct lttng_cpuhp_node *lttng_node; | |
4286 | ||
4287 | lttng_node = container_of(node, struct lttng_cpuhp_node, node); | |
4288 | switch (lttng_node->component) { | |
4289 | case LTTNG_RING_BUFFER_FRONTEND: | |
4290 | return lttng_cpuhp_rb_frontend_online(cpu, lttng_node); | |
4291 | case LTTNG_RING_BUFFER_BACKEND: | |
4292 | return 0; | |
4293 | case LTTNG_RING_BUFFER_ITER: | |
4294 | return lttng_cpuhp_rb_iter_online(cpu, lttng_node); | |
4295 | case LTTNG_CONTEXT_PERF_COUNTERS: | |
4296 | return lttng_cpuhp_perf_counter_online(cpu, lttng_node); | |
4297 | default: | |
4298 | return -EINVAL; | |
4299 | } | |
4300 | } | |
4301 | ||
4302 | static int lttng_hotplug_offline(unsigned int cpu, struct hlist_node *node) | |
4303 | { | |
4304 | struct lttng_cpuhp_node *lttng_node; | |
4305 | ||
4306 | lttng_node = container_of(node, struct lttng_cpuhp_node, node); | |
4307 | switch (lttng_node->component) { | |
4308 | case LTTNG_RING_BUFFER_FRONTEND: | |
4309 | return lttng_cpuhp_rb_frontend_offline(cpu, lttng_node); | |
4310 | case LTTNG_RING_BUFFER_BACKEND: | |
4311 | return 0; | |
4312 | case LTTNG_RING_BUFFER_ITER: | |
4313 | return 0; | |
4314 | case LTTNG_CONTEXT_PERF_COUNTERS: | |
4315 | return 0; | |
4316 | default: | |
4317 | return -EINVAL; | |
4318 | } | |
4319 | } | |
4320 | ||
4321 | static int __init lttng_init_cpu_hotplug(void) | |
4322 | { | |
4323 | int ret; | |
4324 | ||
4325 | ret = cpuhp_setup_state_multi(CPUHP_BP_PREPARE_DYN, "lttng:prepare", | |
4326 | lttng_hotplug_prepare, | |
4327 | lttng_hotplug_dead); | |
4328 | if (ret < 0) { | |
4329 | return ret; | |
4330 | } | |
4331 | lttng_hp_prepare = ret; | |
4332 | lttng_rb_set_hp_prepare(ret); | |
4333 | ||
4334 | ret = cpuhp_setup_state_multi(CPUHP_AP_ONLINE_DYN, "lttng:online", | |
4335 | lttng_hotplug_online, | |
4336 | lttng_hotplug_offline); | |
4337 | if (ret < 0) { | |
4338 | cpuhp_remove_multi_state(lttng_hp_prepare); | |
4339 | lttng_hp_prepare = 0; | |
4340 | return ret; | |
4341 | } | |
4342 | lttng_hp_online = ret; | |
4343 | lttng_rb_set_hp_online(ret); | |
4344 | ||
4345 | return 0; | |
4346 | } | |
4347 | ||
4348 | static void __exit lttng_exit_cpu_hotplug(void) | |
4349 | { | |
4350 | lttng_rb_set_hp_online(0); | |
4351 | cpuhp_remove_multi_state(lttng_hp_online); | |
4352 | lttng_rb_set_hp_prepare(0); | |
4353 | cpuhp_remove_multi_state(lttng_hp_prepare); | |
4354 | } | |
4355 | ||
5f4c791e | 4356 | #else /* #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,10,0)) */ |
1e367326 MD |
4357 | static int lttng_init_cpu_hotplug(void) |
4358 | { | |
4359 | return 0; | |
4360 | } | |
4361 | static void lttng_exit_cpu_hotplug(void) | |
4362 | { | |
4363 | } | |
5f4c791e | 4364 | #endif /* #else #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,10,0)) */ |
1e367326 | 4365 | |
a90917c3 | 4366 | static int __init lttng_events_init(void) |
4e3c1b9b | 4367 | { |
1c25284c MD |
4368 | int ret; |
4369 | ||
453b2495 JD |
4370 | ret = wrapper_lttng_fixup_sig(THIS_MODULE); |
4371 | if (ret) | |
4372 | return ret; | |
389d7070 | 4373 | ret = wrapper_get_pfnblock_flags_mask_init(); |
36561775 MD |
4374 | if (ret) |
4375 | return ret; | |
4376 | ret = wrapper_get_pageblock_flags_mask_init(); | |
114667d5 MD |
4377 | if (ret) |
4378 | return ret; | |
4379 | ret = lttng_probes_init(); | |
389d7070 MD |
4380 | if (ret) |
4381 | return ret; | |
07dfc1d0 | 4382 | ret = lttng_context_init(); |
20591cf7 MD |
4383 | if (ret) |
4384 | return ret; | |
07dfc1d0 MD |
4385 | ret = lttng_tracepoint_init(); |
4386 | if (ret) | |
4387 | goto error_tp; | |
a67ba386 MD |
4388 | event_recorder_cache = KMEM_CACHE(lttng_kernel_event_recorder, 0); |
4389 | if (!event_recorder_cache) { | |
20591cf7 | 4390 | ret = -ENOMEM; |
a67ba386 | 4391 | goto error_kmem_event_recorder; |
dffef45d | 4392 | } |
a67ba386 MD |
4393 | event_recorder_private_cache = KMEM_CACHE(lttng_kernel_event_recorder_private, 0); |
4394 | if (!event_recorder_private_cache) { | |
4395 | ret = -ENOMEM; | |
4396 | goto error_kmem_event_recorder_private; | |
4397 | } | |
4398 | event_notifier_cache = KMEM_CACHE(lttng_kernel_event_notifier, 0); | |
dffef45d FD |
4399 | if (!event_notifier_cache) { |
4400 | ret = -ENOMEM; | |
4401 | goto error_kmem_event_notifier; | |
20591cf7 | 4402 | } |
a67ba386 MD |
4403 | event_notifier_private_cache = KMEM_CACHE(lttng_kernel_event_notifier_private, 0); |
4404 | if (!event_notifier_private_cache) { | |
4405 | ret = -ENOMEM; | |
4406 | goto error_kmem_event_notifier_private; | |
4407 | } | |
80996790 | 4408 | ret = lttng_abi_init(); |
02119ee5 MD |
4409 | if (ret) |
4410 | goto error_abi; | |
0c956676 MD |
4411 | ret = lttng_logger_init(); |
4412 | if (ret) | |
4413 | goto error_logger; | |
1e367326 MD |
4414 | ret = lttng_init_cpu_hotplug(); |
4415 | if (ret) | |
4416 | goto error_hotplug; | |
101215b7 | 4417 | printk(KERN_NOTICE "LTTng: Loaded modules v%s.%s.%s%s (%s)%s%s\n", |
489de24b MJ |
4418 | __stringify(LTTNG_MODULES_MAJOR_VERSION), |
4419 | __stringify(LTTNG_MODULES_MINOR_VERSION), | |
4420 | __stringify(LTTNG_MODULES_PATCHLEVEL_VERSION), | |
4421 | LTTNG_MODULES_EXTRAVERSION, | |
101215b7 MJ |
4422 | LTTNG_VERSION_NAME, |
4423 | #ifdef LTTNG_EXTRA_VERSION_GIT | |
4424 | LTTNG_EXTRA_VERSION_GIT[0] == '\0' ? "" : " - " LTTNG_EXTRA_VERSION_GIT, | |
4425 | #else | |
4426 | "", | |
4427 | #endif | |
4428 | #ifdef LTTNG_EXTRA_VERSION_NAME | |
4429 | LTTNG_EXTRA_VERSION_NAME[0] == '\0' ? "" : " - " LTTNG_EXTRA_VERSION_NAME); | |
4430 | #else | |
4431 | ""); | |
4432 | #endif | |
c1551e57 MJ |
4433 | #ifdef CONFIG_LTTNG_EXPERIMENTAL_BITWISE_ENUM |
4434 | printk(KERN_NOTICE "LTTng: Experimental bitwise enum enabled.\n"); | |
4435 | #endif /* CONFIG_LTTNG_EXPERIMENTAL_BITWISE_ENUM */ | |
4e3c1b9b | 4436 | return 0; |
0c956676 | 4437 | |
1e367326 MD |
4438 | error_hotplug: |
4439 | lttng_logger_exit(); | |
0c956676 MD |
4440 | error_logger: |
4441 | lttng_abi_exit(); | |
02119ee5 | 4442 | error_abi: |
a67ba386 MD |
4443 | kmem_cache_destroy(event_notifier_private_cache); |
4444 | error_kmem_event_notifier_private: | |
dffef45d FD |
4445 | kmem_cache_destroy(event_notifier_cache); |
4446 | error_kmem_event_notifier: | |
a67ba386 MD |
4447 | kmem_cache_destroy(event_recorder_private_cache); |
4448 | error_kmem_event_recorder_private: | |
4449 | kmem_cache_destroy(event_recorder_cache); | |
4450 | error_kmem_event_recorder: | |
20591cf7 | 4451 | lttng_tracepoint_exit(); |
07dfc1d0 MD |
4452 | error_tp: |
4453 | lttng_context_exit(); | |
101215b7 | 4454 | printk(KERN_NOTICE "LTTng: Failed to load modules v%s.%s.%s%s (%s)%s%s\n", |
489de24b MJ |
4455 | __stringify(LTTNG_MODULES_MAJOR_VERSION), |
4456 | __stringify(LTTNG_MODULES_MINOR_VERSION), | |
4457 | __stringify(LTTNG_MODULES_PATCHLEVEL_VERSION), | |
4458 | LTTNG_MODULES_EXTRAVERSION, | |
101215b7 MJ |
4459 | LTTNG_VERSION_NAME, |
4460 | #ifdef LTTNG_EXTRA_VERSION_GIT | |
4461 | LTTNG_EXTRA_VERSION_GIT[0] == '\0' ? "" : " - " LTTNG_EXTRA_VERSION_GIT, | |
4462 | #else | |
4463 | "", | |
4464 | #endif | |
4465 | #ifdef LTTNG_EXTRA_VERSION_NAME | |
4466 | LTTNG_EXTRA_VERSION_NAME[0] == '\0' ? "" : " - " LTTNG_EXTRA_VERSION_NAME); | |
4467 | #else | |
4468 | ""); | |
4469 | #endif | |
1c25284c | 4470 | return ret; |
4e3c1b9b MD |
4471 | } |
4472 | ||
a90917c3 | 4473 | module_init(lttng_events_init); |
11b5a3c2 | 4474 | |
a90917c3 | 4475 | static void __exit lttng_events_exit(void) |
4e3c1b9b | 4476 | { |
8cdc1a81 | 4477 | struct lttng_kernel_session_private *session_priv, *tmpsession_priv; |
92e94819 | 4478 | |
1e367326 | 4479 | lttng_exit_cpu_hotplug(); |
0c956676 | 4480 | lttng_logger_exit(); |
80996790 | 4481 | lttng_abi_exit(); |
8cdc1a81 MD |
4482 | list_for_each_entry_safe(session_priv, tmpsession_priv, &sessions, list) |
4483 | lttng_session_destroy(session_priv->pub); | |
a67ba386 MD |
4484 | kmem_cache_destroy(event_recorder_cache); |
4485 | kmem_cache_destroy(event_recorder_private_cache); | |
dffef45d | 4486 | kmem_cache_destroy(event_notifier_cache); |
a67ba386 | 4487 | kmem_cache_destroy(event_notifier_private_cache); |
20591cf7 | 4488 | lttng_tracepoint_exit(); |
07dfc1d0 | 4489 | lttng_context_exit(); |
101215b7 | 4490 | printk(KERN_NOTICE "LTTng: Unloaded modules v%s.%s.%s%s (%s)%s%s\n", |
489de24b MJ |
4491 | __stringify(LTTNG_MODULES_MAJOR_VERSION), |
4492 | __stringify(LTTNG_MODULES_MINOR_VERSION), | |
4493 | __stringify(LTTNG_MODULES_PATCHLEVEL_VERSION), | |
4494 | LTTNG_MODULES_EXTRAVERSION, | |
101215b7 MJ |
4495 | LTTNG_VERSION_NAME, |
4496 | #ifdef LTTNG_EXTRA_VERSION_GIT | |
4497 | LTTNG_EXTRA_VERSION_GIT[0] == '\0' ? "" : " - " LTTNG_EXTRA_VERSION_GIT, | |
4498 | #else | |
4499 | "", | |
4500 | #endif | |
4501 | #ifdef LTTNG_EXTRA_VERSION_NAME | |
4502 | LTTNG_EXTRA_VERSION_NAME[0] == '\0' ? "" : " - " LTTNG_EXTRA_VERSION_NAME); | |
4503 | #else | |
4504 | ""); | |
4505 | #endif | |
4e3c1b9b | 4506 | } |
92e94819 | 4507 | |
a90917c3 | 4508 | module_exit(lttng_events_exit); |
11b5a3c2 | 4509 | |
7ca11e77 | 4510 | #include <generated/patches.h> |
101215b7 MJ |
4511 | #ifdef LTTNG_EXTRA_VERSION_GIT |
4512 | MODULE_INFO(extra_version_git, LTTNG_EXTRA_VERSION_GIT); | |
4513 | #endif | |
4514 | #ifdef LTTNG_EXTRA_VERSION_NAME | |
4515 | MODULE_INFO(extra_version_name, LTTNG_EXTRA_VERSION_NAME); | |
4516 | #endif | |
92e94819 MD |
4517 | MODULE_LICENSE("GPL and additional rights"); |
4518 | MODULE_AUTHOR("Mathieu Desnoyers <mathieu.desnoyers@efficios.com>"); | |
1c124020 | 4519 | MODULE_DESCRIPTION("LTTng tracer"); |
9a9973ef MD |
4520 | MODULE_VERSION(__stringify(LTTNG_MODULES_MAJOR_VERSION) "." |
4521 | __stringify(LTTNG_MODULES_MINOR_VERSION) "." | |
309370e2 MD |
4522 | __stringify(LTTNG_MODULES_PATCHLEVEL_VERSION) |
4523 | LTTNG_MODULES_EXTRAVERSION); |