Add kernel uid/gid contexts
[lttng-tools.git] / src / common / lttng-kernel.h
... / ...
CommitLineData
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 *
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.
9 *
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.
14 *
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.
18 */
19
20#ifndef _LTTNG_KERNEL_H
21#define _LTTNG_KERNEL_H
22
23#include <stdint.h>
24#include <common/macros.h>
25#include <lttng/constant.h>
26#include <lttng/event.h>
27
28#define LTTNG_KERNEL_SYM_NAME_LEN 256
29#define LTTNG_KERNEL_MAX_UPROBE_NUM 32
30#define LTTNG_KERNEL_SESSION_NAME_LEN 256
31#define LTTNG_KERNEL_SESSION_CREATION_TIME_ISO8601_LEN 26
32
33/*
34 * LTTng DebugFS ABI structures.
35 *
36 * This is the kernel ABI copied from lttng-modules tree.
37 */
38
39enum lttng_kernel_instrumentation {
40 LTTNG_KERNEL_ALL = -1, /* Used within lttng-tools */
41 LTTNG_KERNEL_TRACEPOINT = 0,
42 LTTNG_KERNEL_KPROBE = 1,
43 LTTNG_KERNEL_FUNCTION = 2,
44 LTTNG_KERNEL_KRETPROBE = 3,
45 LTTNG_KERNEL_NOOP = 4, /* not hooked */
46 LTTNG_KERNEL_SYSCALL = 5,
47 LTTNG_KERNEL_UPROBE = 6,
48};
49
50enum lttng_kernel_context_type {
51 LTTNG_KERNEL_CONTEXT_PID = 0,
52 LTTNG_KERNEL_CONTEXT_PERF_CPU_COUNTER = 1,
53 LTTNG_KERNEL_CONTEXT_PROCNAME = 2,
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,
61 LTTNG_KERNEL_CONTEXT_HOSTNAME = 10,
62 LTTNG_KERNEL_CONTEXT_CPU_ID = 11,
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,
67 LTTNG_KERNEL_CONTEXT_CALLSTACK_KERNEL = 16,
68 LTTNG_KERNEL_CONTEXT_CALLSTACK_USER = 17,
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,
76 LTTNG_KERNEL_CONTEXT_UID = 25,
77 LTTNG_KERNEL_CONTEXT_EUID = 26,
78 LTTNG_KERNEL_CONTEXT_SUID = 27,
79 LTTNG_KERNEL_CONTEXT_GID = 28,
80 LTTNG_KERNEL_CONTEXT_EGID = 29,
81 LTTNG_KERNEL_CONTEXT_SGID = 30,
82 LTTNG_KERNEL_CONTEXT_VUID = 31,
83 LTTNG_KERNEL_CONTEXT_VEUID = 32,
84 LTTNG_KERNEL_CONTEXT_VSUID = 33,
85 LTTNG_KERNEL_CONTEXT_VGID = 34,
86 LTTNG_KERNEL_CONTEXT_VEGID = 35,
87 LTTNG_KERNEL_CONTEXT_VSGID = 36,
88};
89
90/* Perf counter attributes */
91struct lttng_kernel_perf_counter_ctx {
92 uint32_t type;
93 uint64_t config;
94 char name[LTTNG_KERNEL_SYM_NAME_LEN];
95} LTTNG_PACKED;
96
97/* Event/Channel context */
98#define LTTNG_KERNEL_CONTEXT_PADDING1 16
99#define LTTNG_KERNEL_CONTEXT_PADDING2 LTTNG_KERNEL_SYM_NAME_LEN + 32
100struct lttng_kernel_context {
101 enum lttng_kernel_context_type ctx;
102 char padding[LTTNG_KERNEL_CONTEXT_PADDING1];
103
104 union {
105 struct lttng_kernel_perf_counter_ctx perf_counter;
106 char padding[LTTNG_KERNEL_CONTEXT_PADDING2];
107 } u;
108} LTTNG_PACKED;
109
110struct lttng_kernel_kretprobe {
111 uint64_t addr;
112
113 uint64_t offset;
114 char symbol_name[LTTNG_KERNEL_SYM_NAME_LEN];
115} LTTNG_PACKED;
116
117/*
118 * Either addr is used, or symbol_name and offset.
119 */
120struct lttng_kernel_kprobe {
121 uint64_t addr;
122
123 uint64_t offset;
124 char symbol_name[LTTNG_KERNEL_SYM_NAME_LEN];
125} LTTNG_PACKED;
126
127struct lttng_kernel_uprobe {
128 int fd;
129} LTTNG_PACKED;
130
131struct lttng_kernel_event_callsite_uprobe {
132 uint64_t offset;
133} LTTNG_PACKED;
134
135struct lttng_kernel_event_callsite {
136 union {
137 struct lttng_kernel_event_callsite_uprobe uprobe;
138 } u;
139} LTTNG_PACKED;
140
141/* Function tracer */
142struct lttng_kernel_function {
143 char symbol_name[LTTNG_KERNEL_SYM_NAME_LEN];
144} LTTNG_PACKED;
145
146#define LTTNG_KERNEL_EVENT_PADDING1 16
147#define LTTNG_KERNEL_EVENT_PADDING2 LTTNG_KERNEL_SYM_NAME_LEN + 32
148struct lttng_kernel_event {
149 char name[LTTNG_KERNEL_SYM_NAME_LEN];
150 enum lttng_kernel_instrumentation instrumentation;
151 char padding[LTTNG_KERNEL_EVENT_PADDING1];
152
153 /* Per instrumentation type configuration */
154 union {
155 struct lttng_kernel_kretprobe kretprobe;
156 struct lttng_kernel_kprobe kprobe;
157 struct lttng_kernel_uprobe uprobe;
158 struct lttng_kernel_function ftrace;
159 char padding[LTTNG_KERNEL_EVENT_PADDING2];
160 } u;
161} LTTNG_PACKED;
162
163struct lttng_kernel_tracer_version {
164 uint32_t major;
165 uint32_t minor;
166 uint32_t patchlevel;
167} LTTNG_PACKED;
168
169struct lttng_kernel_tracer_abi_version {
170 uint32_t major;
171 uint32_t minor;
172} LTTNG_PACKED;
173
174struct lttng_kernel_syscall_mask {
175 uint32_t len; /* in bits */
176 char mask[];
177} LTTNG_PACKED;
178
179/*
180 * kernel channel
181 */
182#define LTTNG_KERNEL_CHANNEL_PADDING1 LTTNG_SYMBOL_NAME_LEN + 32
183struct lttng_kernel_channel {
184 uint64_t subbuf_size; /* bytes */
185 uint64_t num_subbuf; /* power of 2 */
186 unsigned int switch_timer_interval; /* usec */
187 unsigned int read_timer_interval; /* usec */
188 enum lttng_event_output output; /* splice, mmap */
189
190 int overwrite; /* 1: overwrite, 0: discard */
191 char padding[LTTNG_KERNEL_CHANNEL_PADDING1];
192} LTTNG_PACKED;
193
194#define KERNEL_FILTER_BYTECODE_MAX_LEN 65536
195struct lttng_kernel_filter_bytecode {
196 uint32_t len;
197 uint32_t reloc_offset;
198 uint64_t seqnum;
199 char data[0];
200} LTTNG_PACKED;
201
202/*
203 * kernel session name
204 */
205struct lttng_kernel_session_name {
206 char name[LTTNG_KERNEL_SESSION_NAME_LEN];
207} LTTNG_PACKED;
208
209/*
210 * kernel session creation datetime
211 */
212struct lttng_kernel_session_creation_time {
213 char iso8601[LTTNG_KERNEL_SESSION_CREATION_TIME_ISO8601_LEN];
214} LTTNG_PACKED;
215
216#endif /* _LTTNG_KERNEL_H */
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