1 #ifndef _LTT_DEBUGFS_ABI_H
2 #define _LTT_DEBUGFS_ABI_H
7 * Copyright 2010 (c) - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
9 * LTTng debugfs ABI header
11 * Dual LGPL v2.1/GPL v2 license.
16 #define LTTNG_SYM_NAME_LEN 128
18 enum lttng_kernel_instrumentation
{
19 LTTNG_KERNEL_TRACEPOINT
,
21 LTTNG_KERNEL_FUNCTION
,
25 * LTTng DebugFS ABI structures.
28 struct lttng_kernel_channel
{
29 int overwrite
; /* 1: overwrite, 0: discard */
30 uint64_t subbuf_size
; /* in bytes */
32 unsigned int switch_timer_interval
; /* usecs */
33 unsigned int read_timer_interval
; /* usecs */
37 * Either addr is used, or symbol_name and offset.
39 struct lttng_kernel_kprobe
{
43 char symbol_name
[LTTNG_SYM_NAME_LEN
];
46 struct lttng_kernel_function_tracer
{
47 char symbol_name
[LTTNG_SYM_NAME_LEN
];
50 struct lttng_kernel_event
{
51 char name
[LTTNG_SYM_NAME_LEN
]; /* event name */
52 enum lttng_kernel_instrumentation instrumentation
;
53 /* Per instrumentation type configuration */
55 struct lttng_kernel_kprobe kprobe
;
56 struct lttng_kernel_function_tracer ftrace
;
60 struct lttng_kernel_tracer_version
{
66 enum lttng_kernel_context_type
{
67 LTTNG_KERNEL_CONTEXT_PID
,
68 LTTNG_KERNEL_CONTEXT_PERF_COUNTER
,
69 LTTNG_KERNEL_CONTEXT_COMM
,
70 LTTNG_KERNEL_CONTEXT_PRIO
,
71 LTTNG_KERNEL_CONTEXT_NICE
,
74 struct lttng_kernel_perf_counter_ctx
{
77 char name
[LTTNG_SYM_NAME_LEN
];
80 struct lttng_kernel_context
{
81 enum lttng_kernel_context_type ctx
;
83 struct lttng_kernel_perf_counter_ctx perf_counter
;
87 /* LTTng file descriptor ioctl */
88 #define LTTNG_KERNEL_SESSION _IO(0xF6, 0x40)
89 #define LTTNG_KERNEL_TRACER_VERSION \
90 _IOR(0xF6, 0x41, struct lttng_kernel_tracer_version)
91 #define LTTNG_KERNEL_TRACEPOINT_LIST _IO(0xF6, 0x42)
93 /* Session FD ioctl */
94 #define LTTNG_KERNEL_METADATA \
95 _IOW(0xF6, 0x50, struct lttng_kernel_channel)
96 #define LTTNG_KERNEL_CHANNEL \
97 _IOW(0xF6, 0x51, struct lttng_kernel_channel)
98 #define LTTNG_KERNEL_SESSION_START _IO(0xF6, 0x52)
99 #define LTTNG_KERNEL_SESSION_STOP _IO(0xF6, 0x53)
101 /* Channel FD ioctl */
102 #define LTTNG_KERNEL_STREAM _IO(0xF6, 0x60)
103 #define LTTNG_KERNEL_EVENT \
104 _IOW(0xF6, 0x61, struct lttng_kernel_event)
106 /* Event and Channel FD ioctl */
107 #define LTTNG_KERNEL_CONTEXT \
108 _IOW(0xF6, 0x70, struct lttng_kernel_context)
110 /* Event, Channel and Session ioctl */
111 #define LTTNG_KERNEL_ENABLE _IO(0xF6, 0x80)
112 #define LTTNG_KERNEL_DISABLE _IO(0xF6, 0x81)
114 #endif /* _LTT_DEBUGFS_ABI_H */