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
14 #define LTTNG_SYM_NAME_LEN 128
16 enum lttng_kernel_instrumentation
{
17 LTTNG_KERNEL_TRACEPOINT
,
19 LTTNG_KERNEL_FUNCTION
,
23 * LTTng DebugFS ABI structures.
26 struct lttng_kernel_channel
{
27 int overwrite
; /* 1: overwrite, 0: discard */
28 uint64_t subbuf_size
; /* in bytes */
30 unsigned int switch_timer_interval
; /* usecs */
31 unsigned int read_timer_interval
; /* usecs */
35 * Either addr is used, or symbol_name and offset.
37 struct lttng_kernel_kprobe
{
41 char symbol_name
[LTTNG_SYM_NAME_LEN
];
44 struct lttng_kernel_function_tracer
{
45 char symbol_name
[LTTNG_SYM_NAME_LEN
];
48 struct lttng_kernel_event
{
49 char name
[LTTNG_SYM_NAME_LEN
]; /* event name */
50 enum lttng_kernel_instrumentation instrumentation
;
51 /* Per instrumentation type configuration */
53 struct lttng_kernel_kprobe kprobe
;
54 struct lttng_kernel_function_tracer ftrace
;
58 struct lttng_kernel_tracer_version
{
64 enum lttng_kernel_context_type
{
65 LTTNG_KERNEL_CONTEXT_PID
,
66 LTTNG_KERNEL_CONTEXT_PERF_COUNTER
,
67 LTTNG_KERNEL_CONTEXT_COMM
,
70 struct lttng_kernel_perf_counter_ctx
{
75 struct lttng_kernel_context
{
76 enum lttng_kernel_context_type ctx
;
78 struct lttng_kernel_perf_counter_ctx perf_counter
;
82 /* LTTng file descriptor ioctl */
83 #define LTTNG_KERNEL_SESSION _IO(0xF6, 0x40)
84 #define LTTNG_KERNEL_TRACER_VERSION \
85 _IOR(0xF6, 0x41, struct lttng_kernel_tracer_version)
86 #define LTTNG_KERNEL_TRACEPOINT_LIST _IO(0xF6, 0x42)
88 /* Session FD ioctl */
89 #define LTTNG_KERNEL_METADATA \
90 _IOW(0xF6, 0x50, struct lttng_kernel_channel)
91 #define LTTNG_KERNEL_CHANNEL \
92 _IOW(0xF6, 0x51, struct lttng_kernel_channel)
93 #define LTTNG_KERNEL_SESSION_START _IO(0xF6, 0x52)
94 #define LTTNG_KERNEL_SESSION_STOP _IO(0xF6, 0x53)
96 /* Channel FD ioctl */
97 #define LTTNG_KERNEL_STREAM _IO(0xF6, 0x60)
98 #define LTTNG_KERNEL_EVENT \
99 _IOW(0xF6, 0x61, struct lttng_kernel_event)
101 /* Event and Channel FD ioctl */
102 #define LTTNG_KERNEL_CONTEXT \
103 _IOW(0xF6, 0x70, struct lttng_kernel_context)
105 #endif /* _LTT_DEBUGFS_ABI_H */