Update following loglevel support UST API change
[lttng-tools.git] / lttng-sessiond / lttng-ust-abi.h
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1#ifndef _LTTNG_UST_ABI_H
2#define _LTTNG_UST_ABI_H
3
4/*
9df8df5e 5 * lttng/ust-abi.h
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6 *
7 * Copyright 2010-2011 (c) - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
8 *
9 * LTTng-UST ABI header
10 *
11 * Dual LGPL v2.1/GPL v2 license.
12 */
13
14#include <stdint.h>
15
16#define LTTNG_UST_SYM_NAME_LEN 128
17
18#define LTTNG_UST_COMM_VERSION_MAJOR 0
19#define LTTNG_UST_COMM_VERSION_MINOR 1
20
21enum lttng_ust_instrumentation {
22 LTTNG_UST_TRACEPOINT = 0,
23 LTTNG_UST_PROBE = 1,
24 LTTNG_UST_FUNCTION = 2,
25};
26
27enum lttng_ust_output {
28 LTTNG_UST_MMAP = 0,
29};
30
31struct lttng_ust_tracer_version {
32 uint32_t version;
33 uint32_t patchlevel;
34 uint32_t sublevel;
35};
36
37struct lttng_ust_channel {
38 int overwrite; /* 1: overwrite, 0: discard */
39 uint64_t subbuf_size; /* in bytes */
40 uint64_t num_subbuf;
41 unsigned int switch_timer_interval; /* usecs */
42 unsigned int read_timer_interval; /* usecs */
43 enum lttng_ust_output output; /* output mode */
44 /* The following fields are used internally within UST. */
45 int shm_fd;
46 int wait_fd;
47 uint64_t memory_map_size;
48};
49
50/*
51 * This structure is only used internally within UST. It is not per-se
52 * part of the communication between sessiond and UST.
53 */
54struct lttng_ust_stream {
55 int shm_fd;
56 int wait_fd;
57 uint64_t memory_map_size;
58};
59
60struct lttng_ust_event {
61 char name[LTTNG_UST_SYM_NAME_LEN]; /* event name */
62 enum lttng_ust_instrumentation instrumentation;
63 /* Per instrumentation type configuration */
64 union {
65 } u;
66};
67
68enum lttng_ust_context_type {
69 LTTNG_UST_CONTEXT_VTID = 0,
70 LTTNG_UST_CONTEXT_VPID = 1,
71 LTTNG_UST_CONTEXT_PTHREAD_ID = 2,
72 LTTNG_UST_CONTEXT_PROCNAME = 3,
73};
74
75struct lttng_ust_context {
76 enum lttng_ust_context_type ctx;
77 union {
78 } u;
79};
80
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81/*
82 * Tracer channel attributes.
83 */
84struct lttng_ust_channel_attr {
85 int overwrite; /* 1: overwrite, 0: discard */
86 uint64_t subbuf_size; /* bytes */
87 uint64_t num_subbuf; /* power of 2 */
88 unsigned int switch_timer_interval; /* usec */
89 unsigned int read_timer_interval; /* usec */
90 enum lttng_ust_output output; /* splice, mmap */
91};
92
93struct lttng_ust_object_data {
94 int handle;
95 int shm_fd;
96 int wait_fd;
97 uint64_t memory_map_size;
98};
99
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100#define _UST_CMD(minor) (minor)
101#define _UST_CMDR(minor, type) (minor)
102#define _UST_CMDW(minor, type) (minor)
103
104/* Handled by object descriptor */
105#define LTTNG_UST_RELEASE _UST_CMD(0x1)
106
107/* Handled by object cmd */
108
109/* LTTng-UST commands */
110#define LTTNG_UST_SESSION _UST_CMD(0x40)
111#define LTTNG_UST_TRACER_VERSION \
112 _UST_CMDR(0x41, struct lttng_ust_tracer_version)
113#define LTTNG_UST_TRACEPOINT_LIST _UST_CMD(0x42)
114#define LTTNG_UST_WAIT_QUIESCENT _UST_CMD(0x43)
115#define LTTNG_UST_REGISTER_DONE _UST_CMD(0x44)
116
117/* Session FD commands */
118#define LTTNG_UST_METADATA \
119 _UST_CMDW(0x50, struct lttng_ust_channel)
120#define LTTNG_UST_CHANNEL \
121 _UST_CMDW(0x51, struct lttng_ust_channel)
122#define LTTNG_UST_SESSION_START _UST_CMD(0x52)
123#define LTTNG_UST_SESSION_STOP _UST_CMD(0x53)
124
125/* Channel FD commands */
126#define LTTNG_UST_STREAM _UST_CMD(0x60)
127#define LTTNG_UST_EVENT \
128 _UST_CMDW(0x61, struct lttng_ust_event)
129
130/* Event and Channel FD commands */
131#define LTTNG_UST_CONTEXT \
132 _UST_CMDW(0x70, struct lttng_ust_context)
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133#define LTTNG_UST_FLUSH_BUFFER \
134 _UST_CMD(0x71)
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135
136/* Event, Channel and Session commands */
137#define LTTNG_UST_ENABLE _UST_CMD(0x80)
138#define LTTNG_UST_DISABLE _UST_CMD(0x81)
139
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140/* Tracepoint list commands */
141#define LTTNG_UST_TRACEPOINT_LIST_GET _UST_CMD(0x90)
142
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143#define LTTNG_UST_ROOT_HANDLE 0
144
9df8df5e 145struct lttng_ust_obj;
3bd1e081 146
9df8df5e 147struct lttng_ust_objd_ops {
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148 long (*cmd)(int objd, unsigned int cmd, unsigned long arg);
149 int (*release)(int objd);
150};
151
152/* Create root handle. Always ID 0. */
153int lttng_abi_create_root_handle(void);
154
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155const struct lttng_ust_objd_ops *objd_ops(int id);
156int lttng_ust_objd_unref(int id);
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157
158void lttng_ust_abi_exit(void);
9df8df5e 159void lttng_ust_events_exit(void);
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160
161#endif /* _LTTNG_UST_ABI_H */
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