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 */
34 struct lttng_kernel_tracepoint
{
38 * Either addr is used, or symbol_name and offset.
40 struct lttng_kernel_kprobe
{
44 char symbol_name
[LTTNG_SYM_NAME_LEN
];
47 struct lttng_kernel_function_tracer
{
48 char symbol_name
[LTTNG_SYM_NAME_LEN
];
51 struct lttng_kernel_event
{
52 char name
[LTTNG_SYM_NAME_LEN
]; /* event name */
53 enum lttng_kernel_instrumentation instrumentation
;
54 /* Per instrumentation type configuration */
56 struct lttng_kernel_tracepoint tracepoint
;
57 struct lttng_kernel_kprobe kprobe
;
58 struct lttng_kernel_function_tracer ftrace
;
62 struct lttng_kernel_tracer_version
{
70 LTTNG_CONTEXT_PERF_COUNTER
,
73 struct lttng_kernel_pid_ctx
{
76 struct lttng_kernel_perf_counter_ctx
{
81 struct lttng_kernel_context
{
82 enum lttng_context ctx
;
84 struct lttng_kernel_pid_ctx pid
;
85 struct lttng_kernel_perf_counter_ctx perf_counter
;
89 /* LTTng file descriptor ioctl */
90 #define LTTNG_KERNEL_SESSION _IO(0xF6, 0x40)
91 #define LTTNG_KERNEL_TRACER_VERSION \
92 _IOR(0xF6, 0x41, struct lttng_kernel_tracer_version)
93 #define LTTNG_KERNEL_TRACEPOINT_LIST _IO(0xF6, 0x42)
95 /* Session FD ioctl */
96 #define LTTNG_KERNEL_METADATA \
97 _IOW(0xF6, 0x50, struct lttng_kernel_channel)
98 #define LTTNG_KERNEL_CHANNEL \
99 _IOW(0xF6, 0x51, struct lttng_kernel_channel)
100 #define LTTNG_KERNEL_SESSION_START _IO(0xF6, 0x52)
101 #define LTTNG_KERNEL_SESSION_STOP _IO(0xF6, 0x53)
103 /* Channel FD ioctl */
104 #define LTTNG_KERNEL_STREAM _IO(0xF6, 0x60)
105 #define LTTNG_KERNEL_EVENT \
106 _IOW(0xF6, 0x61, struct lttng_kernel_event)
108 /* Event and Channel FD ioctl */
109 #define LTTNG_KERNEL_CONTEXT \
110 _IOW(0xF6, 0x70, struct lttng_kernel_context)
112 #endif /* _LTT_DEBUGFS_ABI_H */