Add UST namespace contexts
[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
8ff4109e 30#define LTTNG_KERNEL_SESSION_NAME_LEN 256
e04b2181 31#define LTTNG_KERNEL_SESSION_CREATION_TIME_ISO8601_LEN 26
9cb98350 32
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33/*
34 * LTTng DebugFS ABI structures.
35 *
36 * This is the kernel ABI copied from lttng-modules tree.
37 */
38
9cb98350 39enum lttng_kernel_instrumentation {
5f822d0a 40 LTTNG_KERNEL_ALL = -1, /* Used within lttng-tools */
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41 LTTNG_KERNEL_TRACEPOINT = 0,
42 LTTNG_KERNEL_KPROBE = 1,
43 LTTNG_KERNEL_FUNCTION = 2,
8f0d098b 44 LTTNG_KERNEL_KRETPROBE = 3,
0133c199 45 LTTNG_KERNEL_NOOP = 4, /* not hooked */
a54bd42d 46 LTTNG_KERNEL_SYSCALL = 5,
1ab8c2ad 47 LTTNG_KERNEL_UPROBE = 6,
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48};
49
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50enum lttng_kernel_context_type {
51 LTTNG_KERNEL_CONTEXT_PID = 0,
aa3514e9 52 LTTNG_KERNEL_CONTEXT_PERF_CPU_COUNTER = 1,
9197c5c4 53 LTTNG_KERNEL_CONTEXT_PROCNAME = 2,
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54 LTTNG_KERNEL_CONTEXT_PRIO = 3,
55 LTTNG_KERNEL_CONTEXT_NICE = 4,
56 LTTNG_KERNEL_CONTEXT_VPID = 5,
57 LTTNG_KERNEL_CONTEXT_TID = 6,
58 LTTNG_KERNEL_CONTEXT_VTID = 7,
59 LTTNG_KERNEL_CONTEXT_PPID = 8,
60 LTTNG_KERNEL_CONTEXT_VPPID = 9,
54773d68 61 LTTNG_KERNEL_CONTEXT_HOSTNAME = 10,
33e801a9 62 LTTNG_KERNEL_CONTEXT_CPU_ID = 11,
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63 LTTNG_KERNEL_CONTEXT_INTERRUPTIBLE = 12,
64 LTTNG_KERNEL_CONTEXT_PREEMPTIBLE = 13,
65 LTTNG_KERNEL_CONTEXT_NEED_RESCHEDULE = 14,
66 LTTNG_KERNEL_CONTEXT_MIGRATABLE = 15,
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67 LTTNG_KERNEL_CONTEXT_CALLSTACK_KERNEL = 16,
68 LTTNG_KERNEL_CONTEXT_CALLSTACK_USER = 17,
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69 LTTNG_KERNEL_CONTEXT_CGROUP_NS = 18,
70 LTTNG_KERNEL_CONTEXT_IPC_NS = 19,
71 LTTNG_KERNEL_CONTEXT_MNT_NS = 20,
72 LTTNG_KERNEL_CONTEXT_NET_NS = 21,
73 LTTNG_KERNEL_CONTEXT_PID_NS = 22,
74 LTTNG_KERNEL_CONTEXT_USER_NS = 23,
75 LTTNG_KERNEL_CONTEXT_UTS_NS = 24,
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76};
77
78/* Perf counter attributes */
79struct lttng_kernel_perf_counter_ctx {
80 uint32_t type;
81 uint64_t config;
dbbb3ec5 82 char name[LTTNG_KERNEL_SYM_NAME_LEN];
113373e4 83} LTTNG_PACKED;
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84
85/* Event/Channel context */
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86#define LTTNG_KERNEL_CONTEXT_PADDING1 16
87#define LTTNG_KERNEL_CONTEXT_PADDING2 LTTNG_KERNEL_SYM_NAME_LEN + 32
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88struct lttng_kernel_context {
89 enum lttng_kernel_context_type ctx;
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90 char padding[LTTNG_KERNEL_CONTEXT_PADDING1];
91
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92 union {
93 struct lttng_kernel_perf_counter_ctx perf_counter;
dbbb3ec5 94 char padding[LTTNG_KERNEL_CONTEXT_PADDING2];
7d29a247 95 } u;
113373e4 96} LTTNG_PACKED;
9cb98350 97
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98struct lttng_kernel_kretprobe {
99 uint64_t addr;
100
101 uint64_t offset;
dbbb3ec5 102 char symbol_name[LTTNG_KERNEL_SYM_NAME_LEN];
113373e4 103} LTTNG_PACKED;
8f0d098b 104
93128a92 105/*
7d29a247 106 * Either addr is used, or symbol_name and offset.
93128a92 107 */
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108struct lttng_kernel_kprobe {
109 uint64_t addr;
110
111 uint64_t offset;
dbbb3ec5 112 char symbol_name[LTTNG_KERNEL_SYM_NAME_LEN];
113373e4 113} LTTNG_PACKED;
9cb98350 114
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115struct lttng_kernel_uprobe {
116 int fd;
117} LTTNG_PACKED;
118
119struct lttng_kernel_event_callsite_uprobe {
120 uint64_t offset;
121} LTTNG_PACKED;
122
123struct lttng_kernel_event_callsite {
124 union {
125 struct lttng_kernel_event_callsite_uprobe uprobe;
126 } u;
127} LTTNG_PACKED;
128
f05b5f07 129/* Function tracer */
7d29a247 130struct lttng_kernel_function {
dbbb3ec5 131 char symbol_name[LTTNG_KERNEL_SYM_NAME_LEN];
113373e4 132} LTTNG_PACKED;
93128a92 133
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134#define LTTNG_KERNEL_EVENT_PADDING1 16
135#define LTTNG_KERNEL_EVENT_PADDING2 LTTNG_KERNEL_SYM_NAME_LEN + 32
9cb98350 136struct lttng_kernel_event {
dbbb3ec5 137 char name[LTTNG_KERNEL_SYM_NAME_LEN];
9cb98350 138 enum lttng_kernel_instrumentation instrumentation;
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139 char padding[LTTNG_KERNEL_EVENT_PADDING1];
140
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141 /* Per instrumentation type configuration */
142 union {
8f0d098b 143 struct lttng_kernel_kretprobe kretprobe;
7d29a247 144 struct lttng_kernel_kprobe kprobe;
1ab8c2ad 145 struct lttng_kernel_uprobe uprobe;
7d29a247 146 struct lttng_kernel_function ftrace;
dbbb3ec5 147 char padding[LTTNG_KERNEL_EVENT_PADDING2];
9cb98350 148 } u;
113373e4 149} LTTNG_PACKED;
93128a92 150
9cb98350 151struct lttng_kernel_tracer_version {
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152 uint32_t major;
153 uint32_t minor;
9cb98350 154 uint32_t patchlevel;
113373e4 155} LTTNG_PACKED;
93128a92 156
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157struct lttng_kernel_tracer_abi_version {
158 uint32_t major;
159 uint32_t minor;
160} LTTNG_PACKED;
161
e80c3634 162struct lttng_kernel_syscall_mask {
46820c8b 163 uint32_t len; /* in bits */
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164 char mask[];
165} LTTNG_PACKED;
166
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167/*
168 * kernel channel
169 */
170#define LTTNG_KERNEL_CHANNEL_PADDING1 LTTNG_SYMBOL_NAME_LEN + 32
171struct lttng_kernel_channel {
172 uint64_t subbuf_size; /* bytes */
173 uint64_t num_subbuf; /* power of 2 */
174 unsigned int switch_timer_interval; /* usec */
175 unsigned int read_timer_interval; /* usec */
176 enum lttng_event_output output; /* splice, mmap */
177
178 int overwrite; /* 1: overwrite, 0: discard */
179 char padding[LTTNG_KERNEL_CHANNEL_PADDING1];
113373e4 180} LTTNG_PACKED;
d0254c7c 181
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182#define KERNEL_FILTER_BYTECODE_MAX_LEN 65536
183struct lttng_kernel_filter_bytecode {
184 uint32_t len;
185 uint32_t reloc_offset;
186 uint64_t seqnum;
187 char data[0];
188} LTTNG_PACKED;
189
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190/*
191 * kernel session name
192 */
193struct lttng_kernel_session_name {
194 char name[LTTNG_KERNEL_SESSION_NAME_LEN];
195} LTTNG_PACKED;
196
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197/*
198 * kernel session creation datetime
199 */
200struct lttng_kernel_session_creation_time {
201 char iso8601[LTTNG_KERNEL_SESSION_CREATION_TIME_ISO8601_LEN];
202} LTTNG_PACKED;
203
93128a92 204#endif /* _LTTNG_KERNEL_H */
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