Implement tracepoint wildcard support
[lttng-modules.git] / lttng-events.h
1 #ifndef _LTTNG_EVENTS_H
2 #define _LTTNG_EVENTS_H
3
4 /*
5 * lttng-events.h
6 *
7 * Holds LTTng per-session event registry.
8 *
9 * Copyright (C) 2010-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
10 *
11 * This library is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU Lesser General Public
13 * License as published by the Free Software Foundation; only
14 * version 2.1 of the License.
15 *
16 * This library is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 * Lesser General Public License for more details.
20 *
21 * You should have received a copy of the GNU Lesser General Public
22 * License along with this library; if not, write to the Free Software
23 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 */
25
26 #include <linux/version.h>
27 #include <linux/list.h>
28 #include <linux/kprobes.h>
29 #include <linux/kref.h>
30 #include "wrapper/uuid.h"
31 #include "lttng-abi.h"
32 #include "lttng-abi-old.h"
33
34 #define lttng_is_signed_type(type) (((type)(-1)) < 0)
35
36 struct lttng_channel;
37 struct lttng_session;
38 struct lttng_metadata_cache;
39 struct lib_ring_buffer_ctx;
40 struct perf_event;
41 struct perf_event_attr;
42 struct lib_ring_buffer_config;
43
44 /* Type description */
45
46 /* Update the astract_types name table in lttng-types.c along with this enum */
47 enum abstract_types {
48 atype_integer,
49 atype_enum,
50 atype_array,
51 atype_sequence,
52 atype_string,
53 NR_ABSTRACT_TYPES,
54 };
55
56 /* Update the string_encodings name table in lttng-types.c along with this enum */
57 enum lttng_string_encodings {
58 lttng_encode_none = 0,
59 lttng_encode_UTF8 = 1,
60 lttng_encode_ASCII = 2,
61 NR_STRING_ENCODINGS,
62 };
63
64 enum channel_type {
65 PER_CPU_CHANNEL,
66 METADATA_CHANNEL,
67 };
68
69 struct lttng_enum_entry {
70 unsigned long long start, end; /* start and end are inclusive */
71 const char *string;
72 };
73
74 #define __type_integer(_type, _byte_order, _base, _encoding) \
75 { \
76 .atype = atype_integer, \
77 .u.basic.integer = \
78 { \
79 .size = sizeof(_type) * CHAR_BIT, \
80 .alignment = lttng_alignof(_type) * CHAR_BIT, \
81 .signedness = lttng_is_signed_type(_type), \
82 .reverse_byte_order = _byte_order != __BYTE_ORDER, \
83 .base = _base, \
84 .encoding = lttng_encode_##_encoding, \
85 }, \
86 } \
87
88 struct lttng_integer_type {
89 unsigned int size; /* in bits */
90 unsigned short alignment; /* in bits */
91 unsigned int signedness:1,
92 reverse_byte_order:1;
93 unsigned int base; /* 2, 8, 10, 16, for pretty print */
94 enum lttng_string_encodings encoding;
95 };
96
97 union _lttng_basic_type {
98 struct lttng_integer_type integer;
99 struct {
100 const char *name;
101 } enumeration;
102 struct {
103 enum lttng_string_encodings encoding;
104 } string;
105 };
106
107 struct lttng_basic_type {
108 enum abstract_types atype;
109 union {
110 union _lttng_basic_type basic;
111 } u;
112 };
113
114 struct lttng_type {
115 enum abstract_types atype;
116 union {
117 union _lttng_basic_type basic;
118 struct {
119 struct lttng_basic_type elem_type;
120 unsigned int length; /* num. elems. */
121 } array;
122 struct {
123 struct lttng_basic_type length_type;
124 struct lttng_basic_type elem_type;
125 } sequence;
126 } u;
127 };
128
129 struct lttng_enum {
130 const char *name;
131 struct lttng_type container_type;
132 const struct lttng_enum_entry *entries;
133 unsigned int len;
134 };
135
136 /* Event field description */
137
138 struct lttng_event_field {
139 const char *name;
140 struct lttng_type type;
141 };
142
143 /*
144 * We need to keep this perf counter field separately from struct
145 * lttng_ctx_field because cpu hotplug needs fixed-location addresses.
146 */
147 struct lttng_perf_counter_field {
148 struct notifier_block nb;
149 int hp_enable;
150 struct perf_event_attr *attr;
151 struct perf_event **e; /* per-cpu array */
152 };
153
154 struct lttng_ctx_field {
155 struct lttng_event_field event_field;
156 size_t (*get_size)(size_t offset);
157 void (*record)(struct lttng_ctx_field *field,
158 struct lib_ring_buffer_ctx *ctx,
159 struct lttng_channel *chan);
160 union {
161 struct lttng_perf_counter_field *perf_counter;
162 } u;
163 void (*destroy)(struct lttng_ctx_field *field);
164 };
165
166 struct lttng_ctx {
167 struct lttng_ctx_field *fields;
168 unsigned int nr_fields;
169 unsigned int allocated_fields;
170 size_t largest_align; /* in bytes */
171 };
172
173 struct lttng_event_desc {
174 const char *name; /* lttng-modules name */
175 const char *kname; /* Linux kernel name (tracepoints) */
176 void *probe_callback;
177 const struct lttng_event_ctx *ctx; /* context */
178 const struct lttng_event_field *fields; /* event payload */
179 unsigned int nr_fields;
180 struct module *owner;
181 };
182
183 struct lttng_probe_desc {
184 const char *provider;
185 const struct lttng_event_desc **event_desc;
186 unsigned int nr_events;
187 struct list_head head; /* chain registered probes */
188 struct list_head lazy_init_head;
189 int lazy; /* lazy registration */
190 };
191
192 struct lttng_krp; /* Kretprobe handling */
193
194 enum lttng_event_type {
195 LTTNG_TYPE_EVENT = 0,
196 LTTNG_TYPE_ENABLER = 1,
197 };
198
199 /*
200 * Objects in a linked-list of enablers, owned by an event.
201 */
202 struct lttng_enabler_ref {
203 struct list_head node; /* enabler ref list */
204 struct lttng_enabler *ref; /* backward ref */
205 };
206
207 /*
208 * lttng_event structure is referred to by the tracing fast path. It must be
209 * kept small.
210 */
211 struct lttng_event {
212 enum lttng_event_type evtype; /* First field. */
213 unsigned int id;
214 struct lttng_channel *chan;
215 int enabled;
216 const struct lttng_event_desc *desc;
217 void *filter;
218 struct lttng_ctx *ctx;
219 enum lttng_kernel_instrumentation instrumentation;
220 union {
221 struct {
222 struct kprobe kp;
223 char *symbol_name;
224 } kprobe;
225 struct {
226 struct lttng_krp *lttng_krp;
227 char *symbol_name;
228 } kretprobe;
229 struct {
230 char *symbol_name;
231 } ftrace;
232 } u;
233 struct list_head list; /* Event list in session */
234 unsigned int metadata_dumped:1;
235
236 /* Backward references: list of lttng_enabler_ref (ref to enablers) */
237 struct list_head enablers_ref_head;
238 struct hlist_node hlist; /* session ht of events */
239 int registered; /* has reg'd tracepoint probe */
240 };
241
242 enum lttng_enabler_type {
243 LTTNG_ENABLER_WILDCARD,
244 LTTNG_ENABLER_NAME,
245 };
246
247 /*
248 * Enabler field, within whatever object is enabling an event. Target of
249 * backward reference.
250 */
251 struct lttng_enabler {
252 enum lttng_event_type evtype; /* First field. */
253
254 enum lttng_enabler_type type;
255
256 struct list_head node; /* per-session list of enablers */
257
258 struct lttng_kernel_event event_param;
259 struct lttng_channel *chan;
260 struct lttng_ctx *ctx;
261 unsigned int enabled:1;
262 };
263
264 struct lttng_channel_ops {
265 struct channel *(*channel_create)(const char *name,
266 struct lttng_channel *lttng_chan,
267 void *buf_addr,
268 size_t subbuf_size, size_t num_subbuf,
269 unsigned int switch_timer_interval,
270 unsigned int read_timer_interval);
271 void (*channel_destroy)(struct channel *chan);
272 struct lib_ring_buffer *(*buffer_read_open)(struct channel *chan);
273 int (*buffer_has_read_closed_stream)(struct channel *chan);
274 void (*buffer_read_close)(struct lib_ring_buffer *buf);
275 int (*event_reserve)(struct lib_ring_buffer_ctx *ctx,
276 uint32_t event_id);
277 void (*event_commit)(struct lib_ring_buffer_ctx *ctx);
278 void (*event_write)(struct lib_ring_buffer_ctx *ctx, const void *src,
279 size_t len);
280 void (*event_write_from_user)(struct lib_ring_buffer_ctx *ctx,
281 const void *src, size_t len);
282 void (*event_memset)(struct lib_ring_buffer_ctx *ctx,
283 int c, size_t len);
284 void (*event_strcpy)(struct lib_ring_buffer_ctx *ctx, const char *src,
285 size_t len);
286 void (*event_strcpy_from_user)(struct lib_ring_buffer_ctx *ctx,
287 const char __user *src, size_t len);
288 /*
289 * packet_avail_size returns the available size in the current
290 * packet. Note that the size returned is only a hint, since it
291 * may change due to concurrent writes.
292 */
293 size_t (*packet_avail_size)(struct channel *chan);
294 wait_queue_head_t *(*get_writer_buf_wait_queue)(struct channel *chan, int cpu);
295 wait_queue_head_t *(*get_hp_wait_queue)(struct channel *chan);
296 int (*is_finalized)(struct channel *chan);
297 int (*is_disabled)(struct channel *chan);
298 int (*timestamp_begin) (const struct lib_ring_buffer_config *config,
299 struct lib_ring_buffer *bufb,
300 uint64_t *timestamp_begin);
301 int (*timestamp_end) (const struct lib_ring_buffer_config *config,
302 struct lib_ring_buffer *bufb,
303 uint64_t *timestamp_end);
304 int (*events_discarded) (const struct lib_ring_buffer_config *config,
305 struct lib_ring_buffer *bufb,
306 uint64_t *events_discarded);
307 int (*content_size) (const struct lib_ring_buffer_config *config,
308 struct lib_ring_buffer *bufb,
309 uint64_t *content_size);
310 int (*packet_size) (const struct lib_ring_buffer_config *config,
311 struct lib_ring_buffer *bufb,
312 uint64_t *packet_size);
313 int (*stream_id) (const struct lib_ring_buffer_config *config,
314 struct lib_ring_buffer *bufb,
315 uint64_t *stream_id);
316 int (*current_timestamp) (const struct lib_ring_buffer_config *config,
317 struct lib_ring_buffer *bufb,
318 uint64_t *ts);
319 };
320
321 struct lttng_transport {
322 char *name;
323 struct module *owner;
324 struct list_head node;
325 struct lttng_channel_ops ops;
326 };
327
328 struct lttng_syscall_filter;
329
330 #define LTTNG_EVENT_HT_BITS 12
331 #define LTTNG_EVENT_HT_SIZE (1U << LTTNG_EVENT_HT_BITS)
332
333 struct lttng_event_ht {
334 struct hlist_head table[LTTNG_EVENT_HT_SIZE];
335 };
336
337 struct lttng_channel {
338 unsigned int id;
339 struct channel *chan; /* Channel buffers */
340 int enabled;
341 struct lttng_ctx *ctx;
342 /* Event ID management */
343 struct lttng_session *session;
344 struct file *file; /* File associated to channel */
345 unsigned int free_event_id; /* Next event ID to allocate */
346 struct list_head list; /* Channel list */
347 struct lttng_channel_ops *ops;
348 struct lttng_transport *transport;
349 struct lttng_event **sc_table; /* for syscall tracing */
350 struct lttng_event **compat_sc_table;
351 struct lttng_event **sc_exit_table; /* for syscall exit tracing */
352 struct lttng_event **compat_sc_exit_table;
353 struct lttng_event *sc_unknown; /* for unknown syscalls */
354 struct lttng_event *sc_compat_unknown;
355 struct lttng_event *sc_exit_unknown;
356 struct lttng_event *compat_sc_exit_unknown;
357 struct lttng_syscall_filter *sc_filter;
358 int header_type; /* 0: unset, 1: compact, 2: large */
359 enum channel_type channel_type;
360 unsigned int metadata_dumped:1,
361 sys_enter_registered:1,
362 sys_exit_registered:1,
363 syscall_all:1,
364 tstate:1; /* Transient enable state */
365 };
366
367 struct lttng_metadata_stream {
368 void *priv; /* Ring buffer private data */
369 struct lttng_metadata_cache *metadata_cache;
370 unsigned int metadata_in; /* Bytes read from the cache */
371 unsigned int metadata_out; /* Bytes consumed from stream */
372 int finalized; /* Has channel been finalized */
373 wait_queue_head_t read_wait; /* Reader buffer-level wait queue */
374 struct list_head list; /* Stream list */
375 struct lttng_transport *transport;
376 struct mutex lock;
377 };
378
379
380 /*
381 * struct lttng_pid_tracker declared in header due to deferencing of *v
382 * in RCU_INITIALIZER(v).
383 */
384 #define LTTNG_PID_HASH_BITS 6
385 #define LTTNG_PID_TABLE_SIZE (1 << LTTNG_PID_HASH_BITS)
386
387 struct lttng_pid_tracker {
388 struct hlist_head pid_hash[LTTNG_PID_TABLE_SIZE];
389 };
390
391 struct lttng_pid_hash_node {
392 struct hlist_node hlist;
393 int pid;
394 };
395
396 struct lttng_session {
397 int active; /* Is trace session active ? */
398 int been_active; /* Has trace session been active ? */
399 struct file *file; /* File associated to session */
400 struct list_head chan; /* Channel list head */
401 struct list_head events; /* Event list head */
402 struct list_head list; /* Session list */
403 unsigned int free_chan_id; /* Next chan ID to allocate */
404 uuid_le uuid; /* Trace session unique ID */
405 struct lttng_metadata_cache *metadata_cache;
406 struct lttng_pid_tracker *pid_tracker;
407 unsigned int metadata_dumped:1,
408 tstate:1; /* Transient enable state */
409 /* List of enablers */
410 struct list_head enablers_head;
411 /* Hash table of events */
412 struct lttng_event_ht events_ht;
413 };
414
415 struct lttng_metadata_cache {
416 char *data; /* Metadata cache */
417 unsigned int cache_alloc; /* Metadata allocated size (bytes) */
418 unsigned int metadata_written; /* Number of bytes written in metadata cache */
419 struct kref refcount; /* Metadata cache usage */
420 struct list_head metadata_stream; /* Metadata stream list */
421 uuid_le uuid; /* Trace session unique ID (copy) */
422 };
423
424 void lttng_lock_sessions(void);
425 void lttng_unlock_sessions(void);
426
427 struct list_head *lttng_get_probe_list_head(void);
428
429 struct lttng_enabler *lttng_enabler_create(enum lttng_enabler_type type,
430 struct lttng_kernel_event *event_param,
431 struct lttng_channel *chan);
432
433 int lttng_enabler_enable(struct lttng_enabler *enabler);
434 int lttng_enabler_disable(struct lttng_enabler *enabler);
435 int lttng_fix_pending_events(void);
436 int lttng_session_active(void);
437
438 struct lttng_session *lttng_session_create(void);
439 int lttng_session_enable(struct lttng_session *session);
440 int lttng_session_disable(struct lttng_session *session);
441 void lttng_session_destroy(struct lttng_session *session);
442 void metadata_cache_destroy(struct kref *kref);
443
444 struct lttng_channel *lttng_channel_create(struct lttng_session *session,
445 const char *transport_name,
446 void *buf_addr,
447 size_t subbuf_size, size_t num_subbuf,
448 unsigned int switch_timer_interval,
449 unsigned int read_timer_interval,
450 enum channel_type channel_type);
451 struct lttng_channel *lttng_global_channel_create(struct lttng_session *session,
452 int overwrite, void *buf_addr,
453 size_t subbuf_size, size_t num_subbuf,
454 unsigned int switch_timer_interval,
455 unsigned int read_timer_interval);
456
457 void lttng_metadata_channel_destroy(struct lttng_channel *chan);
458 struct lttng_event *lttng_event_create(struct lttng_channel *chan,
459 struct lttng_kernel_event *event_param,
460 void *filter,
461 const struct lttng_event_desc *event_desc,
462 enum lttng_kernel_instrumentation itype);
463 struct lttng_event *lttng_event_compat_old_create(struct lttng_channel *chan,
464 struct lttng_kernel_old_event *old_event_param,
465 void *filter,
466 const struct lttng_event_desc *internal_desc);
467
468 int lttng_channel_enable(struct lttng_channel *channel);
469 int lttng_channel_disable(struct lttng_channel *channel);
470 int lttng_event_enable(struct lttng_event *event);
471 int lttng_event_disable(struct lttng_event *event);
472
473 void lttng_transport_register(struct lttng_transport *transport);
474 void lttng_transport_unregister(struct lttng_transport *transport);
475
476 void synchronize_trace(void);
477 int lttng_abi_init(void);
478 int lttng_abi_compat_old_init(void);
479 void lttng_abi_exit(void);
480 void lttng_abi_compat_old_exit(void);
481
482 int lttng_probe_register(struct lttng_probe_desc *desc);
483 void lttng_probe_unregister(struct lttng_probe_desc *desc);
484 const struct lttng_event_desc *lttng_event_get(const char *name);
485 void lttng_event_put(const struct lttng_event_desc *desc);
486 int lttng_probes_init(void);
487 void lttng_probes_exit(void);
488
489 int lttng_metadata_output_channel(struct lttng_metadata_stream *stream,
490 struct channel *chan);
491
492 int lttng_pid_tracker_get_node_pid(const struct lttng_pid_hash_node *node);
493 struct lttng_pid_tracker *lttng_pid_tracker_create(void);
494 void lttng_pid_tracker_destroy(struct lttng_pid_tracker *lpf);
495 bool lttng_pid_tracker_lookup(struct lttng_pid_tracker *lpf, int pid);
496 int lttng_pid_tracker_add(struct lttng_pid_tracker *lpf, int pid);
497 int lttng_pid_tracker_del(struct lttng_pid_tracker *lpf, int pid);
498
499 int lttng_session_track_pid(struct lttng_session *session, int pid);
500 int lttng_session_untrack_pid(struct lttng_session *session, int pid);
501
502 int lttng_session_list_tracker_pids(struct lttng_session *session);
503
504 #if defined(CONFIG_HAVE_SYSCALL_TRACEPOINTS)
505 int lttng_syscalls_register(struct lttng_channel *chan, void *filter);
506 int lttng_syscalls_unregister(struct lttng_channel *chan);
507 int lttng_syscall_filter_enable(struct lttng_channel *chan,
508 const char *name);
509 int lttng_syscall_filter_disable(struct lttng_channel *chan,
510 const char *name);
511 long lttng_channel_syscall_mask(struct lttng_channel *channel,
512 struct lttng_kernel_syscall_mask __user *usyscall_mask);
513 int lttng_abi_syscall_list(void);
514 #else
515 static inline int lttng_syscalls_register(struct lttng_channel *chan, void *filter)
516 {
517 return -ENOSYS;
518 }
519
520 static inline int lttng_syscalls_unregister(struct lttng_channel *chan)
521 {
522 return 0;
523 }
524
525 static inline
526 int lttng_syscall_filter_enable(struct lttng_channel *chan,
527 const char *name)
528 {
529 return -ENOSYS;
530 }
531
532 static inline
533 int lttng_syscall_filter_disable(struct lttng_channel *chan,
534 const char *name)
535 {
536 return -ENOSYS;
537 }
538
539 static inline
540 long lttng_channel_syscall_mask(struct lttng_channel *channel,
541 struct lttng_kernel_syscall_mask __user *usyscall_mask)
542 {
543 return -ENOSYS;
544 }
545
546 static inline
547 int lttng_abi_syscall_list(void)
548 {
549 return -ENOSYS;
550 }
551 #endif
552
553 struct lttng_ctx_field *lttng_append_context(struct lttng_ctx **ctx);
554 void lttng_context_update(struct lttng_ctx *ctx);
555 int lttng_find_context(struct lttng_ctx *ctx, const char *name);
556 void lttng_remove_context_field(struct lttng_ctx **ctx,
557 struct lttng_ctx_field *field);
558 void lttng_destroy_context(struct lttng_ctx *ctx);
559 int lttng_add_pid_to_ctx(struct lttng_ctx **ctx);
560 int lttng_add_procname_to_ctx(struct lttng_ctx **ctx);
561 int lttng_add_prio_to_ctx(struct lttng_ctx **ctx);
562 int lttng_add_nice_to_ctx(struct lttng_ctx **ctx);
563 int lttng_add_vpid_to_ctx(struct lttng_ctx **ctx);
564 int lttng_add_tid_to_ctx(struct lttng_ctx **ctx);
565 int lttng_add_vtid_to_ctx(struct lttng_ctx **ctx);
566 int lttng_add_ppid_to_ctx(struct lttng_ctx **ctx);
567 int lttng_add_vppid_to_ctx(struct lttng_ctx **ctx);
568 int lttng_add_hostname_to_ctx(struct lttng_ctx **ctx);
569 #if defined(CONFIG_PERF_EVENTS) && (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,33))
570 int lttng_add_perf_counter_to_ctx(uint32_t type,
571 uint64_t config,
572 const char *name,
573 struct lttng_ctx **ctx);
574 #else
575 static inline
576 int lttng_add_perf_counter_to_ctx(uint32_t type,
577 uint64_t config,
578 const char *name,
579 struct lttng_ctx **ctx)
580 {
581 return -ENOSYS;
582 }
583 #endif
584
585 int lttng_logger_init(void);
586 void lttng_logger_exit(void);
587
588 extern int lttng_statedump_start(struct lttng_session *session);
589
590 #ifdef CONFIG_KPROBES
591 int lttng_kprobes_register(const char *name,
592 const char *symbol_name,
593 uint64_t offset,
594 uint64_t addr,
595 struct lttng_event *event);
596 void lttng_kprobes_unregister(struct lttng_event *event);
597 void lttng_kprobes_destroy_private(struct lttng_event *event);
598 #else
599 static inline
600 int lttng_kprobes_register(const char *name,
601 const char *symbol_name,
602 uint64_t offset,
603 uint64_t addr,
604 struct lttng_event *event)
605 {
606 return -ENOSYS;
607 }
608
609 static inline
610 void lttng_kprobes_unregister(struct lttng_event *event)
611 {
612 }
613
614 static inline
615 void lttng_kprobes_destroy_private(struct lttng_event *event)
616 {
617 }
618 #endif
619
620 #ifdef CONFIG_KRETPROBES
621 int lttng_kretprobes_register(const char *name,
622 const char *symbol_name,
623 uint64_t offset,
624 uint64_t addr,
625 struct lttng_event *event_entry,
626 struct lttng_event *event_exit);
627 void lttng_kretprobes_unregister(struct lttng_event *event);
628 void lttng_kretprobes_destroy_private(struct lttng_event *event);
629 #else
630 static inline
631 int lttng_kretprobes_register(const char *name,
632 const char *symbol_name,
633 uint64_t offset,
634 uint64_t addr,
635 struct lttng_event *event_entry,
636 struct lttng_event *event_exit)
637 {
638 return -ENOSYS;
639 }
640
641 static inline
642 void lttng_kretprobes_unregister(struct lttng_event *event)
643 {
644 }
645
646 static inline
647 void lttng_kretprobes_destroy_private(struct lttng_event *event)
648 {
649 }
650 #endif
651
652 #ifdef CONFIG_DYNAMIC_FTRACE
653 int lttng_ftrace_register(const char *name,
654 const char *symbol_name,
655 struct lttng_event *event);
656 void lttng_ftrace_unregister(struct lttng_event *event);
657 void lttng_ftrace_destroy_private(struct lttng_event *event);
658 #else
659 static inline
660 int lttng_ftrace_register(const char *name,
661 const char *symbol_name,
662 struct lttng_event *event)
663 {
664 return -ENOSYS;
665 }
666
667 static inline
668 void lttng_ftrace_unregister(struct lttng_event *event)
669 {
670 }
671
672 static inline
673 void lttng_ftrace_destroy_private(struct lttng_event *event)
674 {
675 }
676 #endif
677
678 int lttng_calibrate(struct lttng_kernel_calibrate *calibrate);
679
680 extern const struct file_operations lttng_tracepoint_list_fops;
681 extern const struct file_operations lttng_syscall_list_fops;
682
683 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
684 #define TRACEPOINT_HAS_DATA_ARG
685 #endif
686
687 #endif /* _LTTNG_EVENTS_H */
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