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1 | #ifndef _LTTNG_UST_ABI_H |
2 | #define _LTTNG_UST_ABI_H | |
3 | ||
4 | /* | |
5 | * lttng-ust-abi.h | |
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 | ||
21 | enum lttng_ust_instrumentation { | |
22 | LTTNG_UST_TRACEPOINT = 0, | |
23 | LTTNG_UST_PROBE = 1, | |
24 | LTTNG_UST_FUNCTION = 2, | |
25 | }; | |
26 | ||
27 | enum lttng_ust_output { | |
28 | LTTNG_UST_MMAP = 0, | |
29 | }; | |
30 | ||
31 | struct lttng_ust_tracer_version { | |
32 | uint32_t version; | |
33 | uint32_t patchlevel; | |
34 | uint32_t sublevel; | |
35 | }; | |
36 | ||
37 | struct 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 | */ | |
54 | struct lttng_ust_stream { | |
55 | int shm_fd; | |
56 | int wait_fd; | |
57 | uint64_t memory_map_size; | |
58 | }; | |
59 | ||
60 | struct 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 | ||
68 | enum 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 | ||
75 | struct lttng_ust_context { | |
76 | enum lttng_ust_context_type ctx; | |
77 | union { | |
78 | } u; | |
79 | }; | |
80 | ||
81 | #define _UST_CMD(minor) (minor) | |
82 | #define _UST_CMDR(minor, type) (minor) | |
83 | #define _UST_CMDW(minor, type) (minor) | |
84 | ||
85 | /* Handled by object descriptor */ | |
86 | #define LTTNG_UST_RELEASE _UST_CMD(0x1) | |
87 | ||
88 | /* Handled by object cmd */ | |
89 | ||
90 | /* LTTng-UST commands */ | |
91 | #define LTTNG_UST_SESSION _UST_CMD(0x40) | |
92 | #define LTTNG_UST_TRACER_VERSION \ | |
93 | _UST_CMDR(0x41, struct lttng_ust_tracer_version) | |
94 | #define LTTNG_UST_TRACEPOINT_LIST _UST_CMD(0x42) | |
95 | #define LTTNG_UST_WAIT_QUIESCENT _UST_CMD(0x43) | |
96 | #define LTTNG_UST_REGISTER_DONE _UST_CMD(0x44) | |
97 | ||
98 | /* Session FD commands */ | |
99 | #define LTTNG_UST_METADATA \ | |
100 | _UST_CMDW(0x50, struct lttng_ust_channel) | |
101 | #define LTTNG_UST_CHANNEL \ | |
102 | _UST_CMDW(0x51, struct lttng_ust_channel) | |
103 | #define LTTNG_UST_SESSION_START _UST_CMD(0x52) | |
104 | #define LTTNG_UST_SESSION_STOP _UST_CMD(0x53) | |
105 | ||
106 | /* Channel FD commands */ | |
107 | #define LTTNG_UST_STREAM _UST_CMD(0x60) | |
108 | #define LTTNG_UST_EVENT \ | |
109 | _UST_CMDW(0x61, struct lttng_ust_event) | |
110 | ||
111 | /* Event and Channel FD commands */ | |
112 | #define LTTNG_UST_CONTEXT \ | |
113 | _UST_CMDW(0x70, struct lttng_ust_context) | |
114 | ||
115 | /* Event, Channel and Session commands */ | |
116 | #define LTTNG_UST_ENABLE _UST_CMD(0x80) | |
117 | #define LTTNG_UST_DISABLE _UST_CMD(0x81) | |
118 | ||
119 | #define LTTNG_UST_ROOT_HANDLE 0 | |
120 | ||
121 | struct obj; | |
122 | ||
123 | struct objd_ops { | |
124 | long (*cmd)(int objd, unsigned int cmd, unsigned long arg); | |
125 | int (*release)(int objd); | |
126 | }; | |
127 | ||
128 | /* Create root handle. Always ID 0. */ | |
129 | int lttng_abi_create_root_handle(void); | |
130 | ||
131 | const struct objd_ops *objd_ops(int id); | |
132 | int objd_unref(int id); | |
133 | ||
134 | void lttng_ust_abi_exit(void); | |
135 | void ltt_events_exit(void); | |
136 | ||
137 | #endif /* _LTTNG_UST_ABI_H */ |