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11b5a3c2 MD |
1 | #ifndef _LTT_EVENTS_H |
2 | #define _LTT_EVENTS_H | |
3 | ||
4e3c1b9b MD |
4 | /* |
5 | * ltt-events.h | |
6 | * | |
7 | * Copyright 2010 (c) - Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
8 | * | |
9 | * Holds LTTng per-session event registry. | |
10 | */ | |
11 | ||
12 | #include <linux/list.h> | |
11b5a3c2 | 13 | #include "ltt-debugfs-abi.h" |
4e3c1b9b MD |
14 | |
15 | struct ltt_channel; | |
16 | struct ltt_session; | |
17 | ||
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 | ||
11b5a3c2 MD |
32 | struct ltt_channel_ops { |
33 | struct channel *(*channel_create)(const char *name, | |
34 | struct ltt_session *session, | |
35 | void *buf_addr, | |
36 | size_t subbuf_size, size_t num_subbuf, | |
37 | unsigned int switch_timer_interval, | |
38 | unsigned int read_timer_interval); | |
39 | void (*channel_destroy)(struct channel *chan); | |
40 | struct lib_ring_buffer *(*buffer_read_open)(struct channel *chan); | |
41 | struct lib_ring_buffer *(*buffer_read_close)(struct lib_ring_buffer *buf); | |
42 | }; | |
43 | ||
4e3c1b9b MD |
44 | struct ltt_channel { |
45 | struct channel *chan; /* Channel buffers */ | |
46 | /* Event ID management */ | |
47 | struct ltt_session *session; | |
d4e1a740 | 48 | struct file *file; /* File associated to channel */ |
e5382b6d | 49 | unsigned int free_event_id; /* Next event ID to allocate */ |
4e3c1b9b | 50 | struct list_head list; /* Channel list */ |
653fe716 | 51 | wait_queue_head_t notify_wait; /* Channel addition notif. waitqueue */ |
11b5a3c2 | 52 | struct ltt_channel_ops *ops; |
4e3c1b9b MD |
53 | }; |
54 | ||
55 | struct ltt_session { | |
e5382b6d | 56 | int active; /* Is trace session active ? */ |
d4e1a740 | 57 | struct file *file; /* File associated to session */ |
4e3c1b9b MD |
58 | struct list_head chan; /* Channel list head */ |
59 | struct list_head events; /* Event list head */ | |
60 | struct list_head list; /* Session list */ | |
4e3c1b9b MD |
61 | }; |
62 | ||
c0e31d2e MD |
63 | struct ltt_transport { |
64 | char *name; | |
65 | struct module *owner; | |
66 | struct list_head node; | |
11b5a3c2 | 67 | struct ltt_channel_ops ops; |
c0e31d2e MD |
68 | }; |
69 | ||
baf20995 | 70 | struct ltt_session *ltt_session_create(void); |
c0e31d2e MD |
71 | int ltt_session_start(struct ltt_session *session); |
72 | int ltt_session_stop(struct ltt_session *session); | |
11b5a3c2 | 73 | void ltt_session_destroy(struct ltt_session *session); |
4e3c1b9b | 74 | |
baf20995 | 75 | struct ltt_channel *ltt_channel_create(struct ltt_session *session, |
4e3c1b9b MD |
76 | int overwrite, void *buf_addr, |
77 | size_t subbuf_size, size_t num_subbuf, | |
78 | unsigned int switch_timer_interval, | |
79 | unsigned int read_timer_interval); | |
11b5a3c2 | 80 | void _ltt_channel_destroy(struct ltt_channel *chan); |
4e3c1b9b | 81 | |
653fe716 | 82 | struct ltt_event *ltt_event_create(struct ltt_channel *chan, |
653fe716 | 83 | char *name, |
11b5a3c2 MD |
84 | enum instrum_type itype, |
85 | void *probe, void *filter); | |
4e3c1b9b | 86 | int _ltt_event_destroy(struct ltt_event *event); |
c0e31d2e MD |
87 | |
88 | void ltt_transport_register(struct ltt_transport *transport); | |
89 | void ltt_transport_unregister(struct ltt_transport *transport); | |
11b5a3c2 MD |
90 | |
91 | #endif /* _LTT_EVENTS_H */ |