kernel: event notifier: kernel-ctl interface
[lttng-tools.git] / src / common / lttng-kernel.h
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93128a92 1/*
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2 * Copyright (C) 2011 Julien Desfossez <julien.desfossez@polymtl.ca>
3 * Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
4 * Copyright (C) 2011 David Goulet <david.goulet@polymtl.ca>
93128a92 5 *
ab5be9fa 6 * SPDX-License-Identifier: GPL-2.0-only
93128a92 7 *
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8 */
9
10#ifndef _LTTNG_KERNEL_H
11#define _LTTNG_KERNEL_H
12
e848fc76 13#include <stdint.h>
113373e4 14#include <common/macros.h>
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15#include <lttng/constant.h>
16#include <lttng/event.h>
e848fc76 17
dbbb3ec5 18#define LTTNG_KERNEL_SYM_NAME_LEN 256
0ef03255 19#define LTTNG_KERNEL_MAX_UPROBE_NUM 32
8ff4109e 20#define LTTNG_KERNEL_SESSION_NAME_LEN 256
e04b2181 21#define LTTNG_KERNEL_SESSION_CREATION_TIME_ISO8601_LEN 26
9cb98350 22
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23/*
24 * LTTng DebugFS ABI structures.
25 *
26 * This is the kernel ABI copied from lttng-modules tree.
27 */
28
9cb98350 29enum lttng_kernel_instrumentation {
5f822d0a 30 LTTNG_KERNEL_ALL = -1, /* Used within lttng-tools */
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31 LTTNG_KERNEL_TRACEPOINT = 0,
32 LTTNG_KERNEL_KPROBE = 1,
33 LTTNG_KERNEL_FUNCTION = 2,
8f0d098b 34 LTTNG_KERNEL_KRETPROBE = 3,
0133c199 35 LTTNG_KERNEL_NOOP = 4, /* not hooked */
a54bd42d 36 LTTNG_KERNEL_SYSCALL = 5,
1ab8c2ad 37 LTTNG_KERNEL_UPROBE = 6,
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38};
39
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40enum lttng_kernel_context_type {
41 LTTNG_KERNEL_CONTEXT_PID = 0,
aa3514e9 42 LTTNG_KERNEL_CONTEXT_PERF_CPU_COUNTER = 1,
9197c5c4 43 LTTNG_KERNEL_CONTEXT_PROCNAME = 2,
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44 LTTNG_KERNEL_CONTEXT_PRIO = 3,
45 LTTNG_KERNEL_CONTEXT_NICE = 4,
46 LTTNG_KERNEL_CONTEXT_VPID = 5,
47 LTTNG_KERNEL_CONTEXT_TID = 6,
48 LTTNG_KERNEL_CONTEXT_VTID = 7,
49 LTTNG_KERNEL_CONTEXT_PPID = 8,
50 LTTNG_KERNEL_CONTEXT_VPPID = 9,
54773d68 51 LTTNG_KERNEL_CONTEXT_HOSTNAME = 10,
33e801a9 52 LTTNG_KERNEL_CONTEXT_CPU_ID = 11,
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53 LTTNG_KERNEL_CONTEXT_INTERRUPTIBLE = 12,
54 LTTNG_KERNEL_CONTEXT_PREEMPTIBLE = 13,
55 LTTNG_KERNEL_CONTEXT_NEED_RESCHEDULE = 14,
56 LTTNG_KERNEL_CONTEXT_MIGRATABLE = 15,
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57 LTTNG_KERNEL_CONTEXT_CALLSTACK_KERNEL = 16,
58 LTTNG_KERNEL_CONTEXT_CALLSTACK_USER = 17,
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59 LTTNG_KERNEL_CONTEXT_CGROUP_NS = 18,
60 LTTNG_KERNEL_CONTEXT_IPC_NS = 19,
61 LTTNG_KERNEL_CONTEXT_MNT_NS = 20,
62 LTTNG_KERNEL_CONTEXT_NET_NS = 21,
63 LTTNG_KERNEL_CONTEXT_PID_NS = 22,
64 LTTNG_KERNEL_CONTEXT_USER_NS = 23,
65 LTTNG_KERNEL_CONTEXT_UTS_NS = 24,
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66 LTTNG_KERNEL_CONTEXT_UID = 25,
67 LTTNG_KERNEL_CONTEXT_EUID = 26,
68 LTTNG_KERNEL_CONTEXT_SUID = 27,
69 LTTNG_KERNEL_CONTEXT_GID = 28,
70 LTTNG_KERNEL_CONTEXT_EGID = 29,
71 LTTNG_KERNEL_CONTEXT_SGID = 30,
72 LTTNG_KERNEL_CONTEXT_VUID = 31,
73 LTTNG_KERNEL_CONTEXT_VEUID = 32,
74 LTTNG_KERNEL_CONTEXT_VSUID = 33,
75 LTTNG_KERNEL_CONTEXT_VGID = 34,
76 LTTNG_KERNEL_CONTEXT_VEGID = 35,
77 LTTNG_KERNEL_CONTEXT_VSGID = 36,
d37ac3cd 78 LTTNG_KERNEL_CONTEXT_TIME_NS = 37,
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79};
80
81/* Perf counter attributes */
82struct lttng_kernel_perf_counter_ctx {
83 uint32_t type;
84 uint64_t config;
dbbb3ec5 85 char name[LTTNG_KERNEL_SYM_NAME_LEN];
113373e4 86} LTTNG_PACKED;
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87
88/* Event/Channel context */
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89#define LTTNG_KERNEL_CONTEXT_PADDING1 16
90#define LTTNG_KERNEL_CONTEXT_PADDING2 LTTNG_KERNEL_SYM_NAME_LEN + 32
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91struct lttng_kernel_context {
92 enum lttng_kernel_context_type ctx;
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93 char padding[LTTNG_KERNEL_CONTEXT_PADDING1];
94
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95 union {
96 struct lttng_kernel_perf_counter_ctx perf_counter;
dbbb3ec5 97 char padding[LTTNG_KERNEL_CONTEXT_PADDING2];
7d29a247 98 } u;
113373e4 99} LTTNG_PACKED;
9cb98350 100
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101struct lttng_kernel_kretprobe {
102 uint64_t addr;
103
104 uint64_t offset;
dbbb3ec5 105 char symbol_name[LTTNG_KERNEL_SYM_NAME_LEN];
113373e4 106} LTTNG_PACKED;
8f0d098b 107
93128a92 108/*
7d29a247 109 * Either addr is used, or symbol_name and offset.
93128a92 110 */
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111struct lttng_kernel_kprobe {
112 uint64_t addr;
113
114 uint64_t offset;
dbbb3ec5 115 char symbol_name[LTTNG_KERNEL_SYM_NAME_LEN];
113373e4 116} LTTNG_PACKED;
9cb98350 117
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118struct lttng_kernel_uprobe {
119 int fd;
120} LTTNG_PACKED;
121
122struct lttng_kernel_event_callsite_uprobe {
123 uint64_t offset;
124} LTTNG_PACKED;
125
126struct lttng_kernel_event_callsite {
127 union {
128 struct lttng_kernel_event_callsite_uprobe uprobe;
129 } u;
130} LTTNG_PACKED;
131
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132enum lttng_kernel_syscall_entryexit {
133 LTTNG_KERNEL_SYSCALL_ENTRYEXIT = 0,
134 LTTNG_KERNEL_SYSCALL_ENTRY = 1,
135 LTTNG_KERNEL_SYSCALL_EXIT = 2,
136};
137
138enum lttng_kernel_syscall_abi {
139 LTTNG_KERNEL_SYSCALL_ABI_ALL = 0,
140 LTTNG_KERNEL_SYSCALL_ABI_NATIVE = 1,
141 LTTNG_KERNEL_SYSCALL_ABI_COMPAT = 2,
142};
143
144enum lttng_kernel_syscall_match {
145 LTTNG_KERNEL_SYSCALL_MATCH_NAME = 0,
146 LTTNG_KERNEL_SYSCALL_MATCH_NR = 1,
147};
148
149struct lttng_kernel_syscall {
150 uint8_t entryexit; /* enum lttng_kernel_syscall_entryexit */
151 uint8_t abi; /* enum lttng_kernel_syscall_abi */
152 uint8_t match; /* enum lttng_kernel_syscall_match */
153 uint8_t padding;
154 uint32_t nr; /* For LTTNG_SYSCALL_MATCH_NR */
155} LTTNG_PACKED;
156
f05b5f07 157/* Function tracer */
7d29a247 158struct lttng_kernel_function {
dbbb3ec5 159 char symbol_name[LTTNG_KERNEL_SYM_NAME_LEN];
113373e4 160} LTTNG_PACKED;
93128a92 161
8e49ca12 162#define LTTNG_KERNEL_EVENT_PADDING1 8
dbbb3ec5 163#define LTTNG_KERNEL_EVENT_PADDING2 LTTNG_KERNEL_SYM_NAME_LEN + 32
9cb98350 164struct lttng_kernel_event {
dbbb3ec5 165 char name[LTTNG_KERNEL_SYM_NAME_LEN];
9cb98350 166 enum lttng_kernel_instrumentation instrumentation;
8e49ca12 167 uint64_t token;
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168 char padding[LTTNG_KERNEL_EVENT_PADDING1];
169
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170 /* Per instrumentation type configuration */
171 union {
8f0d098b 172 struct lttng_kernel_kretprobe kretprobe;
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173 struct lttng_kernel_kprobe kprobe;
174 struct lttng_kernel_function ftrace;
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175 struct lttng_kernel_uprobe uprobe;
176 struct lttng_kernel_syscall syscall;
dbbb3ec5 177 char padding[LTTNG_KERNEL_EVENT_PADDING2];
9cb98350 178 } u;
113373e4 179} LTTNG_PACKED;
93128a92 180
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181#define LTTNG_KERNEL_EVENT_NOTIFIER_PADDING 40
182struct lttng_kernel_event_notifier {
183 struct lttng_kernel_event event;
184 char padding[LTTNG_KERNEL_EVENT_NOTIFIER_PADDING];
185} LTTNG_PACKED;
186
187#define LTTNG_KERNEL_EVENT_NOTIFIER_NOTIFICATION_PADDING 34
188struct lttng_kernel_event_notifier_notification {
189 uint64_t token;
190 char padding[LTTNG_KERNEL_EVENT_NOTIFIER_NOTIFICATION_PADDING];
191} LTTNG_PACKED;
192
9cb98350 193struct lttng_kernel_tracer_version {
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194 uint32_t major;
195 uint32_t minor;
9cb98350 196 uint32_t patchlevel;
113373e4 197} LTTNG_PACKED;
93128a92 198
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199struct lttng_kernel_tracer_abi_version {
200 uint32_t major;
201 uint32_t minor;
202} LTTNG_PACKED;
203
e80c3634 204struct lttng_kernel_syscall_mask {
46820c8b 205 uint32_t len; /* in bits */
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206 char mask[];
207} LTTNG_PACKED;
208
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209/*
210 * kernel channel
211 */
212#define LTTNG_KERNEL_CHANNEL_PADDING1 LTTNG_SYMBOL_NAME_LEN + 32
213struct lttng_kernel_channel {
214 uint64_t subbuf_size; /* bytes */
215 uint64_t num_subbuf; /* power of 2 */
216 unsigned int switch_timer_interval; /* usec */
217 unsigned int read_timer_interval; /* usec */
218 enum lttng_event_output output; /* splice, mmap */
219
220 int overwrite; /* 1: overwrite, 0: discard */
221 char padding[LTTNG_KERNEL_CHANNEL_PADDING1];
113373e4 222} LTTNG_PACKED;
d0254c7c 223
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224#define KERNEL_FILTER_BYTECODE_MAX_LEN 65536
225struct lttng_kernel_filter_bytecode {
226 uint32_t len;
227 uint32_t reloc_offset;
228 uint64_t seqnum;
229 char data[0];
230} LTTNG_PACKED;
231
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232/*
233 * kernel session name
234 */
235struct lttng_kernel_session_name {
236 char name[LTTNG_KERNEL_SESSION_NAME_LEN];
237} LTTNG_PACKED;
238
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239/*
240 * kernel session creation datetime
241 */
242struct lttng_kernel_session_creation_time {
243 char iso8601[LTTNG_KERNEL_SESSION_CREATION_TIME_ISO8601_LEN];
244} LTTNG_PACKED;
245
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246enum lttng_kernel_tracker_type {
247 LTTNG_KERNEL_TRACKER_UNKNOWN = -1,
248
249 LTTNG_KERNEL_TRACKER_PID = 0,
250 LTTNG_KERNEL_TRACKER_VPID = 1,
251 LTTNG_KERNEL_TRACKER_UID = 2,
252 LTTNG_KERNEL_TRACKER_VUID = 3,
253 LTTNG_KERNEL_TRACKER_GID = 4,
254 LTTNG_KERNEL_TRACKER_VGID = 5,
255};
256
257struct lttng_kernel_tracker_args {
258 enum lttng_kernel_tracker_type type;
259 int32_t id;
260};
261
93128a92 262#endif /* _LTTNG_KERNEL_H */
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