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3bd1e081 MD |
1 | #ifndef _LTTNG_UST_ABI_H |
2 | #define _LTTNG_UST_ABI_H | |
3 | ||
4 | /* | |
9df8df5e | 5 | * lttng/ust-abi.h |
3bd1e081 MD |
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 | ||
57ab7638 | 16 | #define LTTNG_UST_SYM_NAME_LEN 256 |
3bd1e081 MD |
17 | |
18 | #define LTTNG_UST_COMM_VERSION_MAJOR 0 | |
19 | #define LTTNG_UST_COMM_VERSION_MINOR 1 | |
20 | ||
21 | enum lttng_ust_instrumentation { | |
177f8533 MD |
22 | LTTNG_UST_TRACEPOINT = 0, |
23 | LTTNG_UST_PROBE = 1, | |
24 | LTTNG_UST_FUNCTION = 2, | |
25 | LTTNG_UST_TRACEPOINT_LOGLEVEL = 3, | |
3bd1e081 MD |
26 | }; |
27 | ||
28 | enum lttng_ust_output { | |
29 | LTTNG_UST_MMAP = 0, | |
30 | }; | |
31 | ||
32 | struct lttng_ust_tracer_version { | |
33 | uint32_t version; | |
34 | uint32_t patchlevel; | |
35 | uint32_t sublevel; | |
36 | }; | |
37 | ||
38 | struct lttng_ust_channel { | |
39 | int overwrite; /* 1: overwrite, 0: discard */ | |
40 | uint64_t subbuf_size; /* in bytes */ | |
41 | uint64_t num_subbuf; | |
42 | unsigned int switch_timer_interval; /* usecs */ | |
43 | unsigned int read_timer_interval; /* usecs */ | |
44 | enum lttng_ust_output output; /* output mode */ | |
45 | /* The following fields are used internally within UST. */ | |
46 | int shm_fd; | |
47 | int wait_fd; | |
48 | uint64_t memory_map_size; | |
49 | }; | |
50 | ||
51 | /* | |
52 | * This structure is only used internally within UST. It is not per-se | |
53 | * part of the communication between sessiond and UST. | |
54 | */ | |
55 | struct lttng_ust_stream { | |
56 | int shm_fd; | |
57 | int wait_fd; | |
58 | uint64_t memory_map_size; | |
59 | }; | |
60 | ||
61 | struct lttng_ust_event { | |
62 | char name[LTTNG_UST_SYM_NAME_LEN]; /* event name */ | |
63 | enum lttng_ust_instrumentation instrumentation; | |
64 | /* Per instrumentation type configuration */ | |
65 | union { | |
66 | } u; | |
67 | }; | |
68 | ||
69 | enum lttng_ust_context_type { | |
70 | LTTNG_UST_CONTEXT_VTID = 0, | |
71 | LTTNG_UST_CONTEXT_VPID = 1, | |
72 | LTTNG_UST_CONTEXT_PTHREAD_ID = 2, | |
73 | LTTNG_UST_CONTEXT_PROCNAME = 3, | |
74 | }; | |
75 | ||
76 | struct lttng_ust_context { | |
77 | enum lttng_ust_context_type ctx; | |
78 | union { | |
79 | } u; | |
80 | }; | |
81 | ||
13161846 DG |
82 | /* |
83 | * Tracer channel attributes. | |
84 | */ | |
85 | struct lttng_ust_channel_attr { | |
86 | int overwrite; /* 1: overwrite, 0: discard */ | |
87 | uint64_t subbuf_size; /* bytes */ | |
88 | uint64_t num_subbuf; /* power of 2 */ | |
89 | unsigned int switch_timer_interval; /* usec */ | |
90 | unsigned int read_timer_interval; /* usec */ | |
91 | enum lttng_ust_output output; /* splice, mmap */ | |
92 | }; | |
93 | ||
177f8533 MD |
94 | struct lttng_ust_tracepoint_iter { |
95 | char name[LTTNG_UST_SYM_NAME_LEN]; /* provider:name */ | |
96 | char loglevel[LTTNG_UST_SYM_NAME_LEN]; /* loglevel */ | |
97 | int64_t loglevel_value; | |
98 | }; | |
99 | ||
13161846 DG |
100 | struct lttng_ust_object_data { |
101 | int handle; | |
102 | int shm_fd; | |
103 | int wait_fd; | |
104 | uint64_t memory_map_size; | |
105 | }; | |
106 | ||
3bd1e081 MD |
107 | #define _UST_CMD(minor) (minor) |
108 | #define _UST_CMDR(minor, type) (minor) | |
109 | #define _UST_CMDW(minor, type) (minor) | |
110 | ||
111 | /* Handled by object descriptor */ | |
112 | #define LTTNG_UST_RELEASE _UST_CMD(0x1) | |
113 | ||
114 | /* Handled by object cmd */ | |
115 | ||
116 | /* LTTng-UST commands */ | |
117 | #define LTTNG_UST_SESSION _UST_CMD(0x40) | |
118 | #define LTTNG_UST_TRACER_VERSION \ | |
119 | _UST_CMDR(0x41, struct lttng_ust_tracer_version) | |
120 | #define LTTNG_UST_TRACEPOINT_LIST _UST_CMD(0x42) | |
121 | #define LTTNG_UST_WAIT_QUIESCENT _UST_CMD(0x43) | |
122 | #define LTTNG_UST_REGISTER_DONE _UST_CMD(0x44) | |
123 | ||
124 | /* Session FD commands */ | |
125 | #define LTTNG_UST_METADATA \ | |
126 | _UST_CMDW(0x50, struct lttng_ust_channel) | |
127 | #define LTTNG_UST_CHANNEL \ | |
128 | _UST_CMDW(0x51, struct lttng_ust_channel) | |
129 | #define LTTNG_UST_SESSION_START _UST_CMD(0x52) | |
130 | #define LTTNG_UST_SESSION_STOP _UST_CMD(0x53) | |
131 | ||
132 | /* Channel FD commands */ | |
133 | #define LTTNG_UST_STREAM _UST_CMD(0x60) | |
134 | #define LTTNG_UST_EVENT \ | |
135 | _UST_CMDW(0x61, struct lttng_ust_event) | |
136 | ||
137 | /* Event and Channel FD commands */ | |
138 | #define LTTNG_UST_CONTEXT \ | |
139 | _UST_CMDW(0x70, struct lttng_ust_context) | |
2bdd86d4 MD |
140 | #define LTTNG_UST_FLUSH_BUFFER \ |
141 | _UST_CMD(0x71) | |
3bd1e081 MD |
142 | |
143 | /* Event, Channel and Session commands */ | |
144 | #define LTTNG_UST_ENABLE _UST_CMD(0x80) | |
145 | #define LTTNG_UST_DISABLE _UST_CMD(0x81) | |
146 | ||
8ec2d32a MD |
147 | /* Tracepoint list commands */ |
148 | #define LTTNG_UST_TRACEPOINT_LIST_GET _UST_CMD(0x90) | |
149 | ||
3bd1e081 MD |
150 | #define LTTNG_UST_ROOT_HANDLE 0 |
151 | ||
9df8df5e | 152 | struct lttng_ust_obj; |
3bd1e081 | 153 | |
9df8df5e | 154 | struct lttng_ust_objd_ops { |
3bd1e081 MD |
155 | long (*cmd)(int objd, unsigned int cmd, unsigned long arg); |
156 | int (*release)(int objd); | |
157 | }; | |
158 | ||
159 | /* Create root handle. Always ID 0. */ | |
160 | int lttng_abi_create_root_handle(void); | |
161 | ||
9df8df5e DG |
162 | const struct lttng_ust_objd_ops *objd_ops(int id); |
163 | int lttng_ust_objd_unref(int id); | |
3bd1e081 MD |
164 | |
165 | void lttng_ust_abi_exit(void); | |
9df8df5e | 166 | void lttng_ust_events_exit(void); |
3bd1e081 MD |
167 | |
168 | #endif /* _LTTNG_UST_ABI_H */ |