Optional test for the metadata regeneration
[lttng-tools.git] / src / common / lttng-kernel.h
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1/*
2 * Copyright (C) 2011 - Julien Desfossez <julien.desfossez@polymtl.ca>
3 * Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
4 * David Goulet <david.goulet@polymtl.ca>
5 *
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6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License, version 2 only,
8 * as published by the Free Software Foundation.
93128a92 9 *
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10 * This program is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * more details.
93128a92 14 *
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15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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18 */
19
20#ifndef _LTTNG_KERNEL_H
21#define _LTTNG_KERNEL_H
22
e848fc76 23#include <stdint.h>
113373e4 24#include <common/macros.h>
e848fc76 25
dbbb3ec5 26#define LTTNG_KERNEL_SYM_NAME_LEN 256
9cb98350 27
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28/*
29 * LTTng DebugFS ABI structures.
30 *
31 * This is the kernel ABI copied from lttng-modules tree.
32 */
33
9cb98350 34enum lttng_kernel_instrumentation {
5f822d0a 35 LTTNG_KERNEL_ALL = -1, /* Used within lttng-tools */
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36 LTTNG_KERNEL_TRACEPOINT = 0,
37 LTTNG_KERNEL_KPROBE = 1,
38 LTTNG_KERNEL_FUNCTION = 2,
8f0d098b 39 LTTNG_KERNEL_KRETPROBE = 3,
0133c199 40 LTTNG_KERNEL_NOOP = 4, /* not hooked */
a54bd42d 41 LTTNG_KERNEL_SYSCALL = 5,
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42};
43
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44enum lttng_kernel_context_type {
45 LTTNG_KERNEL_CONTEXT_PID = 0,
aa3514e9 46 LTTNG_KERNEL_CONTEXT_PERF_CPU_COUNTER = 1,
9197c5c4 47 LTTNG_KERNEL_CONTEXT_PROCNAME = 2,
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48 LTTNG_KERNEL_CONTEXT_PRIO = 3,
49 LTTNG_KERNEL_CONTEXT_NICE = 4,
50 LTTNG_KERNEL_CONTEXT_VPID = 5,
51 LTTNG_KERNEL_CONTEXT_TID = 6,
52 LTTNG_KERNEL_CONTEXT_VTID = 7,
53 LTTNG_KERNEL_CONTEXT_PPID = 8,
54 LTTNG_KERNEL_CONTEXT_VPPID = 9,
54773d68 55 LTTNG_KERNEL_CONTEXT_HOSTNAME = 10,
33e801a9 56 LTTNG_KERNEL_CONTEXT_CPU_ID = 11,
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57};
58
59/* Perf counter attributes */
60struct lttng_kernel_perf_counter_ctx {
61 uint32_t type;
62 uint64_t config;
dbbb3ec5 63 char name[LTTNG_KERNEL_SYM_NAME_LEN];
113373e4 64} LTTNG_PACKED;
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65
66/* Event/Channel context */
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67#define LTTNG_KERNEL_CONTEXT_PADDING1 16
68#define LTTNG_KERNEL_CONTEXT_PADDING2 LTTNG_KERNEL_SYM_NAME_LEN + 32
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69struct lttng_kernel_context {
70 enum lttng_kernel_context_type ctx;
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71 char padding[LTTNG_KERNEL_CONTEXT_PADDING1];
72
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73 union {
74 struct lttng_kernel_perf_counter_ctx perf_counter;
dbbb3ec5 75 char padding[LTTNG_KERNEL_CONTEXT_PADDING2];
7d29a247 76 } u;
113373e4 77} LTTNG_PACKED;
9cb98350 78
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79struct lttng_kernel_kretprobe {
80 uint64_t addr;
81
82 uint64_t offset;
dbbb3ec5 83 char symbol_name[LTTNG_KERNEL_SYM_NAME_LEN];
113373e4 84} LTTNG_PACKED;
8f0d098b 85
93128a92 86/*
7d29a247 87 * Either addr is used, or symbol_name and offset.
93128a92 88 */
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89struct lttng_kernel_kprobe {
90 uint64_t addr;
91
92 uint64_t offset;
dbbb3ec5 93 char symbol_name[LTTNG_KERNEL_SYM_NAME_LEN];
113373e4 94} LTTNG_PACKED;
9cb98350 95
f05b5f07 96/* Function tracer */
7d29a247 97struct lttng_kernel_function {
dbbb3ec5 98 char symbol_name[LTTNG_KERNEL_SYM_NAME_LEN];
113373e4 99} LTTNG_PACKED;
93128a92 100
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101#define LTTNG_KERNEL_EVENT_PADDING1 16
102#define LTTNG_KERNEL_EVENT_PADDING2 LTTNG_KERNEL_SYM_NAME_LEN + 32
9cb98350 103struct lttng_kernel_event {
dbbb3ec5 104 char name[LTTNG_KERNEL_SYM_NAME_LEN];
9cb98350 105 enum lttng_kernel_instrumentation instrumentation;
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106 char padding[LTTNG_KERNEL_EVENT_PADDING1];
107
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108 /* Per instrumentation type configuration */
109 union {
8f0d098b 110 struct lttng_kernel_kretprobe kretprobe;
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111 struct lttng_kernel_kprobe kprobe;
112 struct lttng_kernel_function ftrace;
dbbb3ec5 113 char padding[LTTNG_KERNEL_EVENT_PADDING2];
9cb98350 114 } u;
113373e4 115} LTTNG_PACKED;
93128a92 116
9cb98350 117struct lttng_kernel_tracer_version {
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118 uint32_t major;
119 uint32_t minor;
9cb98350 120 uint32_t patchlevel;
113373e4 121} LTTNG_PACKED;
93128a92 122
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123struct lttng_kernel_tracer_abi_version {
124 uint32_t major;
125 uint32_t minor;
126} LTTNG_PACKED;
127
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128enum lttng_kernel_calibrate_type {
129 LTTNG_KERNEL_CALIBRATE_KRETPROBE,
130};
131
132struct lttng_kernel_calibrate {
133 enum lttng_kernel_calibrate_type type; /* type (input) */
113373e4 134} LTTNG_PACKED;
4dbc372b 135
e80c3634 136struct lttng_kernel_syscall_mask {
46820c8b 137 uint32_t len; /* in bits */
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138 char mask[];
139} LTTNG_PACKED;
140
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141/*
142 * kernel channel
143 */
144#define LTTNG_KERNEL_CHANNEL_PADDING1 LTTNG_SYMBOL_NAME_LEN + 32
145struct lttng_kernel_channel {
146 uint64_t subbuf_size; /* bytes */
147 uint64_t num_subbuf; /* power of 2 */
148 unsigned int switch_timer_interval; /* usec */
149 unsigned int read_timer_interval; /* usec */
150 enum lttng_event_output output; /* splice, mmap */
151
152 int overwrite; /* 1: overwrite, 0: discard */
153 char padding[LTTNG_KERNEL_CHANNEL_PADDING1];
113373e4 154} LTTNG_PACKED;
d0254c7c 155
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156#define KERNEL_FILTER_BYTECODE_MAX_LEN 65536
157struct lttng_kernel_filter_bytecode {
158 uint32_t len;
159 uint32_t reloc_offset;
160 uint64_t seqnum;
161 char data[0];
162} LTTNG_PACKED;
163
93128a92 164#endif /* _LTTNG_KERNEL_H */
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