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4e3c1b9b MD |
1 | /* |
2 | * ltt-events.h | |
3 | * | |
4 | * Copyright 2010 (c) - Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
5 | * | |
6 | * Holds LTTng per-session event registry. | |
7 | */ | |
8 | ||
9 | #include <linux/list.h> | |
10 | ||
11 | struct ltt_channel; | |
12 | struct ltt_session; | |
13 | ||
baf20995 MD |
14 | enum instrum_type itype { |
15 | INSTRUM_TRACEPOINTS, | |
16 | }; | |
17 | ||
4e3c1b9b MD |
18 | /* |
19 | * ltt_event structure is referred to by the tracing fast path. It must be | |
20 | * kept small. | |
21 | */ | |
22 | struct ltt_event { | |
23 | unsigned int id; | |
24 | struct ltt_channel *chan; | |
baf20995 | 25 | void *probe; |
4e3c1b9b MD |
26 | void *filter; |
27 | char *name; | |
baf20995 | 28 | enum instrum_type itype; |
4e3c1b9b MD |
29 | struct list_head list; /* Event list */ |
30 | }; | |
31 | ||
32 | struct ltt_channel { | |
33 | struct channel *chan; /* Channel buffers */ | |
34 | /* Event ID management */ | |
35 | struct ltt_session *session; | |
d4e1a740 | 36 | struct file *file; /* File associated to channel */ |
e5382b6d | 37 | unsigned int free_event_id; /* Next event ID to allocate */ |
4e3c1b9b | 38 | struct list_head list; /* Channel list */ |
653fe716 | 39 | wait_queue_head_t notify_wait; /* Channel addition notif. waitqueue */ |
4e3c1b9b MD |
40 | }; |
41 | ||
42 | struct ltt_session { | |
e5382b6d | 43 | int active; /* Is trace session active ? */ |
d4e1a740 | 44 | struct file *file; /* File associated to session */ |
4e3c1b9b MD |
45 | struct list_head chan; /* Channel list head */ |
46 | struct list_head events; /* Event list head */ | |
47 | struct list_head list; /* Session list */ | |
4e3c1b9b MD |
48 | }; |
49 | ||
baf20995 | 50 | struct ltt_session *ltt_session_create(void); |
4e3c1b9b MD |
51 | int ltt_session_destroy(struct ltt_session *session); |
52 | ||
baf20995 | 53 | struct ltt_channel *ltt_channel_create(struct ltt_session *session, |
4e3c1b9b MD |
54 | int overwrite, void *buf_addr, |
55 | size_t subbuf_size, size_t num_subbuf, | |
56 | unsigned int switch_timer_interval, | |
57 | unsigned int read_timer_interval); | |
58 | int _ltt_channel_destroy(struct ltt_channel *chan); | |
59 | ||
653fe716 MD |
60 | struct ltt_event *ltt_event_create(struct ltt_channel *chan, |
61 | enum instrum_type itype, | |
62 | char *name, | |
4e3c1b9b MD |
63 | void *filter); |
64 | int _ltt_event_destroy(struct ltt_event *event); |