2 * lttng-ring-buffer-client.h
4 * LTTng lib ring buffer client template.
6 * Copyright (C) 2010-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; only
11 * version 2.1 of the License.
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with this library; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 #include <linux/module.h>
24 #include <linux/types.h>
25 #include "lib/bitfield.h"
26 #include "wrapper/vmalloc.h" /* for wrapper_vmalloc_sync_all() */
27 #include "wrapper/trace-clock.h"
28 #include "lttng-events.h"
29 #include "lttng-tracer.h"
30 #include "wrapper/ringbuffer/frontend_types.h"
32 #define LTTNG_COMPACT_EVENT_BITS 5
33 #define LTTNG_COMPACT_TSC_BITS 27
35 static struct lttng_transport lttng_relay_transport
;
38 * Keep the natural field alignment for _each field_ within this structure if
39 * you ever add/remove a field from this header. Packed attribute is not used
40 * because gcc generates poor code on at least powerpc and mips. Don't ever
41 * let gcc add padding between the structure elements.
43 * The guarantee we have with timestamps is that all the events in a
44 * packet are included (inclusive) within the begin/end timestamps of
45 * the packet. Another guarantee we have is that the "timestamp begin",
46 * as well as the event timestamps, are monotonically increasing (never
47 * decrease) when moving forward in a stream (physically). But this
48 * guarantee does not apply to "timestamp end", because it is sampled at
49 * commit time, which is not ordered with respect to space reservation.
52 struct packet_header
{
53 /* Trace packet header */
56 * contains endianness information.
60 uint64_t stream_instance_id
;
63 /* Stream packet context */
64 uint64_t timestamp_begin
; /* Cycle count at subbuffer start */
65 uint64_t timestamp_end
; /* Cycle count at subbuffer end */
66 uint64_t content_size
; /* Size of data in subbuffer */
67 uint64_t packet_size
; /* Subbuffer size (include padding) */
68 uint64_t packet_seq_num
; /* Packet sequence number */
69 unsigned long events_discarded
; /*
70 * Events lost in this subbuffer since
71 * the beginning of the trace.
74 uint32_t cpu_id
; /* CPU id associated with stream */
75 uint8_t header_end
; /* End of header */
80 static inline notrace u64
lib_ring_buffer_clock_read(struct channel
*chan
)
82 return trace_clock_read64();
86 size_t ctx_get_size(size_t offset
, struct lttng_ctx
*ctx
)
89 size_t orig_offset
= offset
;
93 offset
+= lib_ring_buffer_align(offset
, ctx
->largest_align
);
94 for (i
= 0; i
< ctx
->nr_fields
; i
++)
95 offset
+= ctx
->fields
[i
].get_size(offset
);
96 return offset
- orig_offset
;
100 void ctx_record(struct lib_ring_buffer_ctx
*bufctx
,
101 struct lttng_channel
*chan
,
102 struct lttng_ctx
*ctx
)
108 lib_ring_buffer_align_ctx(bufctx
, ctx
->largest_align
);
109 for (i
= 0; i
< ctx
->nr_fields
; i
++)
110 ctx
->fields
[i
].record(&ctx
->fields
[i
], bufctx
, chan
);
114 * record_header_size - Calculate the header size and padding necessary.
115 * @config: ring buffer instance configuration
117 * @offset: offset in the write buffer
118 * @pre_header_padding: padding to add before the header (output)
119 * @ctx: reservation context
121 * Returns the event header size (including padding).
123 * The payload must itself determine its own alignment from the biggest type it
127 unsigned char record_header_size(const struct lib_ring_buffer_config
*config
,
128 struct channel
*chan
, size_t offset
,
129 size_t *pre_header_padding
,
130 struct lib_ring_buffer_ctx
*ctx
)
132 struct lttng_channel
*lttng_chan
= channel_get_private(chan
);
133 struct lttng_event
*event
= ctx
->priv
;
134 size_t orig_offset
= offset
;
137 switch (lttng_chan
->header_type
) {
138 case 1: /* compact */
139 padding
= lib_ring_buffer_align(offset
, lttng_alignof(uint32_t));
141 if (!(ctx
->rflags
& (RING_BUFFER_RFLAG_FULL_TSC
| LTTNG_RFLAG_EXTENDED
))) {
142 offset
+= sizeof(uint32_t); /* id and timestamp */
144 /* Minimum space taken by LTTNG_COMPACT_EVENT_BITS id */
145 offset
+= (LTTNG_COMPACT_EVENT_BITS
+ CHAR_BIT
- 1) / CHAR_BIT
;
146 /* Align extended struct on largest member */
147 offset
+= lib_ring_buffer_align(offset
, lttng_alignof(uint64_t));
148 offset
+= sizeof(uint32_t); /* id */
149 offset
+= lib_ring_buffer_align(offset
, lttng_alignof(uint64_t));
150 offset
+= sizeof(uint64_t); /* timestamp */
154 padding
= lib_ring_buffer_align(offset
, lttng_alignof(uint16_t));
156 offset
+= sizeof(uint16_t);
157 if (!(ctx
->rflags
& (RING_BUFFER_RFLAG_FULL_TSC
| LTTNG_RFLAG_EXTENDED
))) {
158 offset
+= lib_ring_buffer_align(offset
, lttng_alignof(uint32_t));
159 offset
+= sizeof(uint32_t); /* timestamp */
161 /* Align extended struct on largest member */
162 offset
+= lib_ring_buffer_align(offset
, lttng_alignof(uint64_t));
163 offset
+= sizeof(uint32_t); /* id */
164 offset
+= lib_ring_buffer_align(offset
, lttng_alignof(uint64_t));
165 offset
+= sizeof(uint64_t); /* timestamp */
172 offset
+= ctx_get_size(offset
, event
->ctx
);
173 offset
+= ctx_get_size(offset
, lttng_chan
->ctx
);
175 *pre_header_padding
= padding
;
176 return offset
- orig_offset
;
179 #include "wrapper/ringbuffer/api.h"
182 void lttng_write_event_header_slow(const struct lib_ring_buffer_config
*config
,
183 struct lib_ring_buffer_ctx
*ctx
,
187 * lttng_write_event_header
189 * Writes the event header to the offset (already aligned on 32-bits).
191 * @config: ring buffer instance configuration
192 * @ctx: reservation context
193 * @event_id: event ID
196 void lttng_write_event_header(const struct lib_ring_buffer_config
*config
,
197 struct lib_ring_buffer_ctx
*ctx
,
200 struct lttng_channel
*lttng_chan
= channel_get_private(ctx
->chan
);
201 struct lttng_event
*event
= ctx
->priv
;
203 if (unlikely(ctx
->rflags
))
206 switch (lttng_chan
->header_type
) {
207 case 1: /* compact */
209 uint32_t id_time
= 0;
211 bt_bitfield_write(&id_time
, uint32_t,
213 LTTNG_COMPACT_EVENT_BITS
,
215 bt_bitfield_write(&id_time
, uint32_t,
216 LTTNG_COMPACT_EVENT_BITS
,
217 LTTNG_COMPACT_TSC_BITS
,
219 lib_ring_buffer_write(config
, ctx
, &id_time
, sizeof(id_time
));
224 uint32_t timestamp
= (uint32_t) ctx
->tsc
;
225 uint16_t id
= event_id
;
227 lib_ring_buffer_write(config
, ctx
, &id
, sizeof(id
));
228 lib_ring_buffer_align_ctx(ctx
, lttng_alignof(uint32_t));
229 lib_ring_buffer_write(config
, ctx
, ×tamp
, sizeof(timestamp
));
236 ctx_record(ctx
, lttng_chan
, lttng_chan
->ctx
);
237 ctx_record(ctx
, lttng_chan
, event
->ctx
);
238 lib_ring_buffer_align_ctx(ctx
, ctx
->largest_align
);
243 lttng_write_event_header_slow(config
, ctx
, event_id
);
247 void lttng_write_event_header_slow(const struct lib_ring_buffer_config
*config
,
248 struct lib_ring_buffer_ctx
*ctx
,
251 struct lttng_channel
*lttng_chan
= channel_get_private(ctx
->chan
);
252 struct lttng_event
*event
= ctx
->priv
;
254 switch (lttng_chan
->header_type
) {
255 case 1: /* compact */
256 if (!(ctx
->rflags
& (RING_BUFFER_RFLAG_FULL_TSC
| LTTNG_RFLAG_EXTENDED
))) {
257 uint32_t id_time
= 0;
259 bt_bitfield_write(&id_time
, uint32_t,
261 LTTNG_COMPACT_EVENT_BITS
,
263 bt_bitfield_write(&id_time
, uint32_t,
264 LTTNG_COMPACT_EVENT_BITS
,
265 LTTNG_COMPACT_TSC_BITS
, ctx
->tsc
);
266 lib_ring_buffer_write(config
, ctx
, &id_time
, sizeof(id_time
));
269 uint64_t timestamp
= ctx
->tsc
;
271 bt_bitfield_write(&id
, uint8_t,
273 LTTNG_COMPACT_EVENT_BITS
,
275 lib_ring_buffer_write(config
, ctx
, &id
, sizeof(id
));
276 /* Align extended struct on largest member */
277 lib_ring_buffer_align_ctx(ctx
, lttng_alignof(uint64_t));
278 lib_ring_buffer_write(config
, ctx
, &event_id
, sizeof(event_id
));
279 lib_ring_buffer_align_ctx(ctx
, lttng_alignof(uint64_t));
280 lib_ring_buffer_write(config
, ctx
, ×tamp
, sizeof(timestamp
));
285 if (!(ctx
->rflags
& (RING_BUFFER_RFLAG_FULL_TSC
| LTTNG_RFLAG_EXTENDED
))) {
286 uint32_t timestamp
= (uint32_t) ctx
->tsc
;
287 uint16_t id
= event_id
;
289 lib_ring_buffer_write(config
, ctx
, &id
, sizeof(id
));
290 lib_ring_buffer_align_ctx(ctx
, lttng_alignof(uint32_t));
291 lib_ring_buffer_write(config
, ctx
, ×tamp
, sizeof(timestamp
));
294 uint64_t timestamp
= ctx
->tsc
;
296 lib_ring_buffer_write(config
, ctx
, &id
, sizeof(id
));
297 /* Align extended struct on largest member */
298 lib_ring_buffer_align_ctx(ctx
, lttng_alignof(uint64_t));
299 lib_ring_buffer_write(config
, ctx
, &event_id
, sizeof(event_id
));
300 lib_ring_buffer_align_ctx(ctx
, lttng_alignof(uint64_t));
301 lib_ring_buffer_write(config
, ctx
, ×tamp
, sizeof(timestamp
));
308 ctx_record(ctx
, lttng_chan
, lttng_chan
->ctx
);
309 ctx_record(ctx
, lttng_chan
, event
->ctx
);
310 lib_ring_buffer_align_ctx(ctx
, ctx
->largest_align
);
313 static const struct lib_ring_buffer_config client_config
;
315 static u64
client_ring_buffer_clock_read(struct channel
*chan
)
317 return lib_ring_buffer_clock_read(chan
);
321 size_t client_record_header_size(const struct lib_ring_buffer_config
*config
,
322 struct channel
*chan
, size_t offset
,
323 size_t *pre_header_padding
,
324 struct lib_ring_buffer_ctx
*ctx
)
326 return record_header_size(config
, chan
, offset
,
327 pre_header_padding
, ctx
);
331 * client_packet_header_size - called on buffer-switch to a new sub-buffer
333 * Return header size without padding after the structure. Don't use packed
334 * structure because gcc generates inefficient code on some architectures
337 static size_t client_packet_header_size(void)
339 return offsetof(struct packet_header
, ctx
.header_end
);
342 static void client_buffer_begin(struct lib_ring_buffer
*buf
, u64 tsc
,
343 unsigned int subbuf_idx
)
345 struct channel
*chan
= buf
->backend
.chan
;
346 struct packet_header
*header
=
347 (struct packet_header
*)
348 lib_ring_buffer_offset_address(&buf
->backend
,
349 subbuf_idx
* chan
->backend
.subbuf_size
);
350 struct lttng_channel
*lttng_chan
= channel_get_private(chan
);
351 struct lttng_session
*session
= lttng_chan
->session
;
353 header
->magic
= CTF_MAGIC_NUMBER
;
354 memcpy(header
->uuid
, session
->uuid
.b
, sizeof(session
->uuid
));
355 header
->stream_id
= lttng_chan
->id
;
356 header
->stream_instance_id
= buf
->backend
.cpu
;
357 header
->ctx
.timestamp_begin
= tsc
;
358 header
->ctx
.timestamp_end
= 0;
359 header
->ctx
.content_size
= ~0ULL; /* for debugging */
360 header
->ctx
.packet_size
= ~0ULL;
361 header
->ctx
.packet_seq_num
= chan
->backend
.num_subbuf
* \
362 buf
->backend
.buf_cnt
[subbuf_idx
].seq_cnt
+ \
364 header
->ctx
.events_discarded
= 0;
365 header
->ctx
.cpu_id
= buf
->backend
.cpu
;
369 * offset is assumed to never be 0 here : never deliver a completely empty
370 * subbuffer. data_size is between 1 and subbuf_size.
372 static void client_buffer_end(struct lib_ring_buffer
*buf
, u64 tsc
,
373 unsigned int subbuf_idx
, unsigned long data_size
)
375 struct channel
*chan
= buf
->backend
.chan
;
376 struct packet_header
*header
=
377 (struct packet_header
*)
378 lib_ring_buffer_offset_address(&buf
->backend
,
379 subbuf_idx
* chan
->backend
.subbuf_size
);
380 unsigned long records_lost
= 0;
382 header
->ctx
.timestamp_end
= tsc
;
383 header
->ctx
.content_size
=
384 (uint64_t) data_size
* CHAR_BIT
; /* in bits */
385 header
->ctx
.packet_size
=
386 (uint64_t) PAGE_ALIGN(data_size
) * CHAR_BIT
; /* in bits */
387 records_lost
+= lib_ring_buffer_get_records_lost_full(&client_config
, buf
);
388 records_lost
+= lib_ring_buffer_get_records_lost_wrap(&client_config
, buf
);
389 records_lost
+= lib_ring_buffer_get_records_lost_big(&client_config
, buf
);
390 header
->ctx
.events_discarded
= records_lost
;
393 static int client_buffer_create(struct lib_ring_buffer
*buf
, void *priv
,
394 int cpu
, const char *name
)
399 static void client_buffer_finalize(struct lib_ring_buffer
*buf
, void *priv
, int cpu
)
403 static struct packet_header
*client_packet_header(
404 const struct lib_ring_buffer_config
*config
,
405 struct lib_ring_buffer
*buf
)
407 return lib_ring_buffer_read_offset_address(&buf
->backend
, 0);
410 static int client_timestamp_begin(const struct lib_ring_buffer_config
*config
,
411 struct lib_ring_buffer
*buf
,
412 uint64_t *timestamp_begin
)
414 struct packet_header
*header
= client_packet_header(config
, buf
);
415 *timestamp_begin
= header
->ctx
.timestamp_begin
;
420 static int client_timestamp_end(const struct lib_ring_buffer_config
*config
,
421 struct lib_ring_buffer
*buf
,
422 uint64_t *timestamp_end
)
424 struct packet_header
*header
= client_packet_header(config
, buf
);
425 *timestamp_end
= header
->ctx
.timestamp_end
;
430 static int client_events_discarded(const struct lib_ring_buffer_config
*config
,
431 struct lib_ring_buffer
*buf
,
432 uint64_t *events_discarded
)
434 struct packet_header
*header
= client_packet_header(config
, buf
);
435 *events_discarded
= header
->ctx
.events_discarded
;
440 static int client_content_size(const struct lib_ring_buffer_config
*config
,
441 struct lib_ring_buffer
*buf
,
442 uint64_t *content_size
)
444 struct packet_header
*header
= client_packet_header(config
, buf
);
445 *content_size
= header
->ctx
.content_size
;
450 static int client_packet_size(const struct lib_ring_buffer_config
*config
,
451 struct lib_ring_buffer
*buf
,
452 uint64_t *packet_size
)
454 struct packet_header
*header
= client_packet_header(config
, buf
);
455 *packet_size
= header
->ctx
.packet_size
;
460 static int client_stream_id(const struct lib_ring_buffer_config
*config
,
461 struct lib_ring_buffer
*buf
,
464 struct packet_header
*header
= client_packet_header(config
, buf
);
465 *stream_id
= header
->stream_id
;
470 static int client_current_timestamp(const struct lib_ring_buffer_config
*config
,
471 struct lib_ring_buffer
*bufb
,
474 *ts
= config
->cb
.ring_buffer_clock_read(bufb
->backend
.chan
);
479 static int client_sequence_number(const struct lib_ring_buffer_config
*config
,
480 struct lib_ring_buffer
*buf
,
483 struct packet_header
*header
= client_packet_header(config
, buf
);
485 *seq
= header
->ctx
.packet_seq_num
;
491 int client_instance_id(const struct lib_ring_buffer_config
*config
,
492 struct lib_ring_buffer
*buf
,
495 struct packet_header
*header
= client_packet_header(config
, buf
);
496 *id
= header
->stream_instance_id
;
501 static const struct lib_ring_buffer_config client_config
= {
502 .cb
.ring_buffer_clock_read
= client_ring_buffer_clock_read
,
503 .cb
.record_header_size
= client_record_header_size
,
504 .cb
.subbuffer_header_size
= client_packet_header_size
,
505 .cb
.buffer_begin
= client_buffer_begin
,
506 .cb
.buffer_end
= client_buffer_end
,
507 .cb
.buffer_create
= client_buffer_create
,
508 .cb
.buffer_finalize
= client_buffer_finalize
,
510 .tsc_bits
= LTTNG_COMPACT_TSC_BITS
,
511 .alloc
= RING_BUFFER_ALLOC_PER_CPU
,
512 .sync
= RING_BUFFER_SYNC_PER_CPU
,
513 .mode
= RING_BUFFER_MODE_TEMPLATE
,
514 .backend
= RING_BUFFER_PAGE
,
515 .output
= RING_BUFFER_OUTPUT_TEMPLATE
,
516 .oops
= RING_BUFFER_OOPS_CONSISTENCY
,
517 .ipi
= RING_BUFFER_IPI_BARRIER
,
518 .wakeup
= RING_BUFFER_WAKEUP_BY_TIMER
,
522 void release_priv_ops(void *priv_ops
)
524 module_put(THIS_MODULE
);
528 void lttng_channel_destroy(struct channel
*chan
)
530 channel_destroy(chan
);
534 struct channel
*_channel_create(const char *name
,
535 struct lttng_channel
*lttng_chan
, void *buf_addr
,
536 size_t subbuf_size
, size_t num_subbuf
,
537 unsigned int switch_timer_interval
,
538 unsigned int read_timer_interval
)
540 struct channel
*chan
;
542 chan
= channel_create(&client_config
, name
, lttng_chan
, buf_addr
,
543 subbuf_size
, num_subbuf
, switch_timer_interval
,
544 read_timer_interval
);
547 * Ensure this module is not unloaded before we finish
548 * using lttng_relay_transport.ops.
550 if (!try_module_get(THIS_MODULE
)) {
551 printk(KERN_WARNING
"LTT : Can't lock transport module.\n");
554 chan
->backend
.priv_ops
= <tng_relay_transport
.ops
;
555 chan
->backend
.release_priv_ops
= release_priv_ops
;
560 lttng_channel_destroy(chan
);
565 struct lib_ring_buffer
*lttng_buffer_read_open(struct channel
*chan
)
567 struct lib_ring_buffer
*buf
;
570 for_each_channel_cpu(cpu
, chan
) {
571 buf
= channel_get_ring_buffer(&client_config
, chan
, cpu
);
572 if (!lib_ring_buffer_open_read(buf
))
579 int lttng_buffer_has_read_closed_stream(struct channel
*chan
)
581 struct lib_ring_buffer
*buf
;
584 for_each_channel_cpu(cpu
, chan
) {
585 buf
= channel_get_ring_buffer(&client_config
, chan
, cpu
);
586 if (!atomic_long_read(&buf
->active_readers
))
593 void lttng_buffer_read_close(struct lib_ring_buffer
*buf
)
595 lib_ring_buffer_release_read(buf
);
599 int lttng_event_reserve(struct lib_ring_buffer_ctx
*ctx
,
602 struct lttng_channel
*lttng_chan
= channel_get_private(ctx
->chan
);
605 cpu
= lib_ring_buffer_get_cpu(&client_config
);
610 switch (lttng_chan
->header_type
) {
611 case 1: /* compact */
613 ctx
->rflags
|= LTTNG_RFLAG_EXTENDED
;
616 if (event_id
> 65534)
617 ctx
->rflags
|= LTTNG_RFLAG_EXTENDED
;
623 ret
= lib_ring_buffer_reserve(&client_config
, ctx
);
626 lttng_write_event_header(&client_config
, ctx
, event_id
);
629 lib_ring_buffer_put_cpu(&client_config
);
634 void lttng_event_commit(struct lib_ring_buffer_ctx
*ctx
)
636 lib_ring_buffer_commit(&client_config
, ctx
);
637 lib_ring_buffer_put_cpu(&client_config
);
641 void lttng_event_write(struct lib_ring_buffer_ctx
*ctx
, const void *src
,
644 lib_ring_buffer_write(&client_config
, ctx
, src
, len
);
648 void lttng_event_write_from_user(struct lib_ring_buffer_ctx
*ctx
,
649 const void __user
*src
, size_t len
)
651 lib_ring_buffer_copy_from_user_inatomic(&client_config
, ctx
, src
, len
);
655 void lttng_event_memset(struct lib_ring_buffer_ctx
*ctx
,
658 lib_ring_buffer_memset(&client_config
, ctx
, c
, len
);
662 void lttng_event_strcpy(struct lib_ring_buffer_ctx
*ctx
, const char *src
,
665 lib_ring_buffer_strcpy(&client_config
, ctx
, src
, len
, '#');
669 void lttng_event_strcpy_from_user(struct lib_ring_buffer_ctx
*ctx
,
670 const char __user
*src
, size_t len
)
672 lib_ring_buffer_strcpy_from_user_inatomic(&client_config
, ctx
, src
,
677 wait_queue_head_t
*lttng_get_writer_buf_wait_queue(struct channel
*chan
, int cpu
)
679 struct lib_ring_buffer
*buf
= channel_get_ring_buffer(&client_config
,
681 return &buf
->write_wait
;
685 wait_queue_head_t
*lttng_get_hp_wait_queue(struct channel
*chan
)
687 return &chan
->hp_wait
;
691 int lttng_is_finalized(struct channel
*chan
)
693 return lib_ring_buffer_channel_is_finalized(chan
);
697 int lttng_is_disabled(struct channel
*chan
)
699 return lib_ring_buffer_channel_is_disabled(chan
);
702 static struct lttng_transport lttng_relay_transport
= {
703 .name
= "relay-" RING_BUFFER_MODE_TEMPLATE_STRING
,
704 .owner
= THIS_MODULE
,
706 .channel_create
= _channel_create
,
707 .channel_destroy
= lttng_channel_destroy
,
708 .buffer_read_open
= lttng_buffer_read_open
,
709 .buffer_has_read_closed_stream
=
710 lttng_buffer_has_read_closed_stream
,
711 .buffer_read_close
= lttng_buffer_read_close
,
712 .event_reserve
= lttng_event_reserve
,
713 .event_commit
= lttng_event_commit
,
714 .event_write
= lttng_event_write
,
715 .event_write_from_user
= lttng_event_write_from_user
,
716 .event_memset
= lttng_event_memset
,
717 .event_strcpy
= lttng_event_strcpy
,
718 .event_strcpy_from_user
= lttng_event_strcpy_from_user
,
719 .packet_avail_size
= NULL
, /* Would be racy anyway */
720 .get_writer_buf_wait_queue
= lttng_get_writer_buf_wait_queue
,
721 .get_hp_wait_queue
= lttng_get_hp_wait_queue
,
722 .is_finalized
= lttng_is_finalized
,
723 .is_disabled
= lttng_is_disabled
,
724 .timestamp_begin
= client_timestamp_begin
,
725 .timestamp_end
= client_timestamp_end
,
726 .events_discarded
= client_events_discarded
,
727 .content_size
= client_content_size
,
728 .packet_size
= client_packet_size
,
729 .stream_id
= client_stream_id
,
730 .current_timestamp
= client_current_timestamp
,
731 .sequence_number
= client_sequence_number
,
732 .instance_id
= client_instance_id
,
736 static int __init
lttng_ring_buffer_client_init(void)
739 * This vmalloc sync all also takes care of the lib ring buffer
740 * vmalloc'd module pages when it is built as a module into LTTng.
742 wrapper_vmalloc_sync_all();
743 lttng_transport_register(<tng_relay_transport
);
747 module_init(lttng_ring_buffer_client_init
);
749 static void __exit
lttng_ring_buffer_client_exit(void)
751 lttng_transport_unregister(<tng_relay_transport
);
754 module_exit(lttng_ring_buffer_client_exit
);
756 MODULE_LICENSE("GPL and additional rights");
757 MODULE_AUTHOR("Mathieu Desnoyers");
758 MODULE_DESCRIPTION("LTTng ring buffer " RING_BUFFER_MODE_TEMPLATE_STRING