Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1/*
2 * Copyright (C) 2012 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>
3 *
4 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation;
8 * version 2.1 of the License (not later!)
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU Lesser General Public License for more details.
14 *
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
20 */
21#ifndef _KBUFFER_H
22#define _KBUFFER_H
23
24#ifndef TS_SHIFT
25#define TS_SHIFT 27
26#endif
27
28enum kbuffer_endian {
29 KBUFFER_ENDIAN_BIG,
30 KBUFFER_ENDIAN_LITTLE,
31};
32
33enum kbuffer_long_size {
34 KBUFFER_LSIZE_4,
35 KBUFFER_LSIZE_8,
36};
37
38enum {
39 KBUFFER_TYPE_PADDING = 29,
40 KBUFFER_TYPE_TIME_EXTEND = 30,
41 KBUFFER_TYPE_TIME_STAMP = 31,
42};
43
44struct kbuffer;
45
46struct kbuffer *kbuffer_alloc(enum kbuffer_long_size size, enum kbuffer_endian endian);
47void kbuffer_free(struct kbuffer *kbuf);
48int kbuffer_load_subbuffer(struct kbuffer *kbuf, void *subbuffer);
49void *kbuffer_read_event(struct kbuffer *kbuf, unsigned long long *ts);
50void *kbuffer_next_event(struct kbuffer *kbuf, unsigned long long *ts);
51unsigned long long kbuffer_timestamp(struct kbuffer *kbuf);
52unsigned long long kbuffer_subbuf_timestamp(struct kbuffer *kbuf, void *subbuf);
53unsigned int kbuffer_ptr_delta(struct kbuffer *kbuf, void *ptr);
54
55void *kbuffer_translate_data(int swap, void *data, unsigned int *size);
56
57void *kbuffer_read_at_offset(struct kbuffer *kbuf, int offset, unsigned long long *ts);
58
59int kbuffer_curr_index(struct kbuffer *kbuf);
60
61int kbuffer_curr_offset(struct kbuffer *kbuf);
62int kbuffer_curr_size(struct kbuffer *kbuf);
63int kbuffer_event_size(struct kbuffer *kbuf);
64int kbuffer_missed_events(struct kbuffer *kbuf);
65int kbuffer_subbuffer_size(struct kbuffer *kbuf);
66
67void kbuffer_set_old_format(struct kbuffer *kbuf);
68int kbuffer_start_of_data(struct kbuffer *kbuf);
69
70/* Debugging */
71
72struct kbuffer_raw_info {
73 int type;
74 int length;
75 unsigned long long delta;
76 void *next;
77};
78
79/* Read raw data */
80struct kbuffer_raw_info *kbuffer_raw_get(struct kbuffer *kbuf, void *subbuf,
81 struct kbuffer_raw_info *info);
82
83#endif /* _K_BUFFER_H */