Add exclusion data to enable-command
[lttng-tools.git] / src / common / lttng-kernel.h
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
26 #define LTTNG_KERNEL_SYM_NAME_LEN 256
27
28 /*
29 * LTTng DebugFS ABI structures.
30 *
31 * This is the kernel ABI copied from lttng-modules tree.
32 */
33
34 enum lttng_kernel_instrumentation {
35 LTTNG_KERNEL_ALL = -1, /* Used within lttng-tools */
36 LTTNG_KERNEL_TRACEPOINT = 0,
37 LTTNG_KERNEL_KPROBE = 1,
38 LTTNG_KERNEL_FUNCTION = 2,
39 LTTNG_KERNEL_KRETPROBE = 3,
40 LTTNG_KERNEL_NOOP = 4, /* not hooked */
41 LTTNG_KERNEL_SYSCALL = 5,
42 };
43
44 enum lttng_kernel_context_type {
45 LTTNG_KERNEL_CONTEXT_PID = 0,
46 LTTNG_KERNEL_CONTEXT_PERF_COUNTER = 1,
47 LTTNG_KERNEL_CONTEXT_PROCNAME = 2,
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,
55 LTTNG_KERNEL_CONTEXT_HOSTNAME = 10,
56 };
57
58 /* Perf counter attributes */
59 struct lttng_kernel_perf_counter_ctx {
60 uint32_t type;
61 uint64_t config;
62 char name[LTTNG_KERNEL_SYM_NAME_LEN];
63 } LTTNG_PACKED;
64
65 /* Event/Channel context */
66 #define LTTNG_KERNEL_CONTEXT_PADDING1 16
67 #define LTTNG_KERNEL_CONTEXT_PADDING2 LTTNG_KERNEL_SYM_NAME_LEN + 32
68 struct lttng_kernel_context {
69 enum lttng_kernel_context_type ctx;
70 char padding[LTTNG_KERNEL_CONTEXT_PADDING1];
71
72 union {
73 struct lttng_kernel_perf_counter_ctx perf_counter;
74 char padding[LTTNG_KERNEL_CONTEXT_PADDING2];
75 } u;
76 } LTTNG_PACKED;
77
78 struct lttng_kernel_kretprobe {
79 uint64_t addr;
80
81 uint64_t offset;
82 char symbol_name[LTTNG_KERNEL_SYM_NAME_LEN];
83 } LTTNG_PACKED;
84
85 /*
86 * Either addr is used, or symbol_name and offset.
87 */
88 struct lttng_kernel_kprobe {
89 uint64_t addr;
90
91 uint64_t offset;
92 char symbol_name[LTTNG_KERNEL_SYM_NAME_LEN];
93 } LTTNG_PACKED;
94
95 /* Function tracer */
96 struct lttng_kernel_function {
97 char symbol_name[LTTNG_KERNEL_SYM_NAME_LEN];
98 } LTTNG_PACKED;
99
100 #define LTTNG_KERNEL_EVENT_PADDING1 16
101 #define LTTNG_KERNEL_EVENT_PADDING2 LTTNG_KERNEL_SYM_NAME_LEN + 32
102 struct lttng_kernel_event {
103 char name[LTTNG_KERNEL_SYM_NAME_LEN];
104 enum lttng_kernel_instrumentation instrumentation;
105 char padding[LTTNG_KERNEL_EVENT_PADDING1];
106
107 /* Per instrumentation type configuration */
108 union {
109 struct lttng_kernel_kretprobe kretprobe;
110 struct lttng_kernel_kprobe kprobe;
111 struct lttng_kernel_function ftrace;
112 char padding[LTTNG_KERNEL_EVENT_PADDING2];
113 } u;
114 } LTTNG_PACKED;
115
116 struct lttng_kernel_tracer_version {
117 uint32_t major;
118 uint32_t minor;
119 uint32_t patchlevel;
120 } LTTNG_PACKED;
121
122 enum lttng_kernel_calibrate_type {
123 LTTNG_KERNEL_CALIBRATE_KRETPROBE,
124 };
125
126 struct lttng_kernel_calibrate {
127 enum lttng_kernel_calibrate_type type; /* type (input) */
128 } LTTNG_PACKED;
129
130 /*
131 * kernel channel
132 */
133 #define LTTNG_KERNEL_CHANNEL_PADDING1 LTTNG_SYMBOL_NAME_LEN + 32
134 struct lttng_kernel_channel {
135 uint64_t subbuf_size; /* bytes */
136 uint64_t num_subbuf; /* power of 2 */
137 unsigned int switch_timer_interval; /* usec */
138 unsigned int read_timer_interval; /* usec */
139 enum lttng_event_output output; /* splice, mmap */
140
141 int overwrite; /* 1: overwrite, 0: discard */
142 char padding[LTTNG_KERNEL_CHANNEL_PADDING1];
143 } LTTNG_PACKED;
144
145 #endif /* _LTTNG_KERNEL_H */
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