Metadata: add env fields to ease lttng path hierarchy creation for viewer
[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>
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25#include <lttng/constant.h>
26#include <lttng/event.h>
e848fc76 27
dbbb3ec5 28#define LTTNG_KERNEL_SYM_NAME_LEN 256
0ef03255 29#define LTTNG_KERNEL_MAX_UPROBE_NUM 32
9cb98350 30
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31/*
32 * LTTng DebugFS ABI structures.
33 *
34 * This is the kernel ABI copied from lttng-modules tree.
35 */
36
9cb98350 37enum lttng_kernel_instrumentation {
5f822d0a 38 LTTNG_KERNEL_ALL = -1, /* Used within lttng-tools */
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39 LTTNG_KERNEL_TRACEPOINT = 0,
40 LTTNG_KERNEL_KPROBE = 1,
41 LTTNG_KERNEL_FUNCTION = 2,
8f0d098b 42 LTTNG_KERNEL_KRETPROBE = 3,
0133c199 43 LTTNG_KERNEL_NOOP = 4, /* not hooked */
a54bd42d 44 LTTNG_KERNEL_SYSCALL = 5,
1ab8c2ad 45 LTTNG_KERNEL_UPROBE = 6,
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46};
47
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48enum lttng_kernel_context_type {
49 LTTNG_KERNEL_CONTEXT_PID = 0,
aa3514e9 50 LTTNG_KERNEL_CONTEXT_PERF_CPU_COUNTER = 1,
9197c5c4 51 LTTNG_KERNEL_CONTEXT_PROCNAME = 2,
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52 LTTNG_KERNEL_CONTEXT_PRIO = 3,
53 LTTNG_KERNEL_CONTEXT_NICE = 4,
54 LTTNG_KERNEL_CONTEXT_VPID = 5,
55 LTTNG_KERNEL_CONTEXT_TID = 6,
56 LTTNG_KERNEL_CONTEXT_VTID = 7,
57 LTTNG_KERNEL_CONTEXT_PPID = 8,
58 LTTNG_KERNEL_CONTEXT_VPPID = 9,
54773d68 59 LTTNG_KERNEL_CONTEXT_HOSTNAME = 10,
33e801a9 60 LTTNG_KERNEL_CONTEXT_CPU_ID = 11,
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61 LTTNG_KERNEL_CONTEXT_INTERRUPTIBLE = 12,
62 LTTNG_KERNEL_CONTEXT_PREEMPTIBLE = 13,
63 LTTNG_KERNEL_CONTEXT_NEED_RESCHEDULE = 14,
64 LTTNG_KERNEL_CONTEXT_MIGRATABLE = 15,
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65 LTTNG_KERNEL_CONTEXT_CALLSTACK_KERNEL = 16,
66 LTTNG_KERNEL_CONTEXT_CALLSTACK_USER = 17,
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67};
68
69/* Perf counter attributes */
70struct lttng_kernel_perf_counter_ctx {
71 uint32_t type;
72 uint64_t config;
dbbb3ec5 73 char name[LTTNG_KERNEL_SYM_NAME_LEN];
113373e4 74} LTTNG_PACKED;
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75
76/* Event/Channel context */
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77#define LTTNG_KERNEL_CONTEXT_PADDING1 16
78#define LTTNG_KERNEL_CONTEXT_PADDING2 LTTNG_KERNEL_SYM_NAME_LEN + 32
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79struct lttng_kernel_context {
80 enum lttng_kernel_context_type ctx;
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81 char padding[LTTNG_KERNEL_CONTEXT_PADDING1];
82
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83 union {
84 struct lttng_kernel_perf_counter_ctx perf_counter;
dbbb3ec5 85 char padding[LTTNG_KERNEL_CONTEXT_PADDING2];
7d29a247 86 } u;
113373e4 87} LTTNG_PACKED;
9cb98350 88
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89struct lttng_kernel_kretprobe {
90 uint64_t addr;
91
92 uint64_t offset;
dbbb3ec5 93 char symbol_name[LTTNG_KERNEL_SYM_NAME_LEN];
113373e4 94} LTTNG_PACKED;
8f0d098b 95
93128a92 96/*
7d29a247 97 * Either addr is used, or symbol_name and offset.
93128a92 98 */
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99struct lttng_kernel_kprobe {
100 uint64_t addr;
101
102 uint64_t offset;
dbbb3ec5 103 char symbol_name[LTTNG_KERNEL_SYM_NAME_LEN];
113373e4 104} LTTNG_PACKED;
9cb98350 105
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106struct lttng_kernel_uprobe {
107 int fd;
108} LTTNG_PACKED;
109
110struct lttng_kernel_event_callsite_uprobe {
111 uint64_t offset;
112} LTTNG_PACKED;
113
114struct lttng_kernel_event_callsite {
115 union {
116 struct lttng_kernel_event_callsite_uprobe uprobe;
117 } u;
118} LTTNG_PACKED;
119
f05b5f07 120/* Function tracer */
7d29a247 121struct lttng_kernel_function {
dbbb3ec5 122 char symbol_name[LTTNG_KERNEL_SYM_NAME_LEN];
113373e4 123} LTTNG_PACKED;
93128a92 124
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125#define LTTNG_KERNEL_EVENT_PADDING1 16
126#define LTTNG_KERNEL_EVENT_PADDING2 LTTNG_KERNEL_SYM_NAME_LEN + 32
9cb98350 127struct lttng_kernel_event {
dbbb3ec5 128 char name[LTTNG_KERNEL_SYM_NAME_LEN];
9cb98350 129 enum lttng_kernel_instrumentation instrumentation;
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130 char padding[LTTNG_KERNEL_EVENT_PADDING1];
131
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132 /* Per instrumentation type configuration */
133 union {
8f0d098b 134 struct lttng_kernel_kretprobe kretprobe;
7d29a247 135 struct lttng_kernel_kprobe kprobe;
1ab8c2ad 136 struct lttng_kernel_uprobe uprobe;
7d29a247 137 struct lttng_kernel_function ftrace;
dbbb3ec5 138 char padding[LTTNG_KERNEL_EVENT_PADDING2];
9cb98350 139 } u;
113373e4 140} LTTNG_PACKED;
93128a92 141
9cb98350 142struct lttng_kernel_tracer_version {
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143 uint32_t major;
144 uint32_t minor;
9cb98350 145 uint32_t patchlevel;
113373e4 146} LTTNG_PACKED;
93128a92 147
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148struct lttng_kernel_tracer_abi_version {
149 uint32_t major;
150 uint32_t minor;
151} LTTNG_PACKED;
152
e80c3634 153struct lttng_kernel_syscall_mask {
46820c8b 154 uint32_t len; /* in bits */
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155 char mask[];
156} LTTNG_PACKED;
157
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158/*
159 * kernel channel
160 */
161#define LTTNG_KERNEL_CHANNEL_PADDING1 LTTNG_SYMBOL_NAME_LEN + 32
162struct lttng_kernel_channel {
163 uint64_t subbuf_size; /* bytes */
164 uint64_t num_subbuf; /* power of 2 */
165 unsigned int switch_timer_interval; /* usec */
166 unsigned int read_timer_interval; /* usec */
167 enum lttng_event_output output; /* splice, mmap */
168
169 int overwrite; /* 1: overwrite, 0: discard */
170 char padding[LTTNG_KERNEL_CHANNEL_PADDING1];
113373e4 171} LTTNG_PACKED;
d0254c7c 172
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173#define KERNEL_FILTER_BYTECODE_MAX_LEN 65536
174struct lttng_kernel_filter_bytecode {
175 uint32_t len;
176 uint32_t reloc_offset;
177 uint64_t seqnum;
178 char data[0];
179} LTTNG_PACKED;
180
93128a92 181#endif /* _LTTNG_KERNEL_H */
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