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92bc1e23 MD |
1 | /* SPDX-License-Identifier: (GPL-2.0-only or LGPL-2.1-only) |
2 | * | |
3 | * lttng/events-internal.h | |
4 | * | |
5 | * Copyright (C) 2010-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
6 | */ | |
7 | ||
8 | #ifndef _LTTNG_EVENTS_INTERNAL_H | |
9 | #define _LTTNG_EVENTS_INTERNAL_H | |
10 | ||
437d5aa5 MD |
11 | #include <lttng/events.h> |
12 | ||
a67ba386 MD |
13 | struct lttng_kernel_event_common_private { |
14 | struct lttng_kernel_event_common *pub; /* Public event interface */ | |
15 | ||
16 | const struct lttng_kernel_event_desc *desc; | |
17 | /* Backward references: list of lttng_enabler_ref (ref to enablers) */ | |
18 | struct list_head enablers_ref_head; | |
19 | int registered; /* has reg'd tracepoint probe */ | |
20 | uint64_t user_token; | |
21 | ||
22 | int has_enablers_without_filter_bytecode; | |
8a445457 | 23 | /* list of struct lttng_bytecode_runtime, sorted by seqnum */ |
a67ba386 MD |
24 | struct list_head filter_bytecode_runtime_head; |
25 | enum lttng_kernel_abi_instrumentation instrumentation; | |
26 | /* Selected by instrumentation */ | |
27 | union { | |
28 | struct lttng_kprobe kprobe; | |
29 | struct lttng_uprobe uprobe; | |
30 | struct { | |
31 | struct lttng_krp *lttng_krp; | |
32 | char *symbol_name; | |
33 | } kretprobe; | |
34 | struct { | |
35 | enum lttng_syscall_entryexit entryexit; | |
36 | enum lttng_syscall_abi abi; | |
37 | struct hlist_node node; /* chain registered syscall event_notifier */ | |
38 | unsigned int syscall_id; | |
39 | } syscall; | |
40 | } u; | |
41 | }; | |
42 | ||
43 | struct lttng_kernel_event_recorder_private { | |
44 | struct lttng_kernel_event_common_private parent; | |
45 | ||
46 | struct lttng_kernel_event_recorder *pub; /* Public event interface */ | |
47 | struct list_head node; /* Event recorder list */ | |
48 | struct hlist_node hlist; /* Hash table of event recorders */ | |
49 | struct lttng_kernel_ctx *ctx; | |
50 | unsigned int id; | |
51 | unsigned int metadata_dumped:1; | |
52 | }; | |
53 | ||
54 | struct lttng_kernel_event_notifier_private { | |
55 | struct lttng_kernel_event_common_private parent; | |
56 | ||
57 | struct lttng_kernel_event_notifier *pub; /* Public event notifier interface */ | |
58 | struct lttng_event_notifier_group *group; /* weak ref */ | |
59 | size_t num_captures; /* Needed to allocate the msgpack array. */ | |
60 | uint64_t error_counter_index; | |
61 | struct list_head node; /* Event notifier list */ | |
62 | struct hlist_node hlist; /* Hash table of event notifiers */ | |
63 | struct list_head capture_bytecode_runtime_head; | |
64 | ||
65 | }; | |
66 | ||
8a445457 MD |
67 | enum lttng_kernel_bytecode_interpreter_ret { |
68 | LTTNG_KERNEL_BYTECODE_INTERPRETER_ERROR = -1, | |
69 | LTTNG_KERNEL_BYTECODE_INTERPRETER_OK = 0, | |
70 | }; | |
71 | ||
72 | enum lttng_kernel_bytecode_filter_result { | |
73 | LTTNG_KERNEL_BYTECODE_FILTER_ACCEPT = 0, | |
74 | LTTNG_KERNEL_BYTECODE_FILTER_REJECT = 1, | |
75 | }; | |
76 | ||
77 | struct lttng_kernel_bytecode_filter_ctx { | |
78 | enum lttng_kernel_bytecode_filter_result result; | |
79 | }; | |
80 | ||
5e08a34f MD |
81 | /* |
82 | * Enabler field, within whatever object is enabling an event. Target of | |
83 | * backward reference. | |
84 | */ | |
85 | struct lttng_enabler { | |
86 | enum lttng_enabler_format_type format_type; | |
87 | ||
88 | /* head list of struct lttng_bytecode_node */ | |
89 | struct list_head filter_bytecode_head; | |
90 | ||
91 | struct lttng_kernel_abi_event event_param; | |
92 | unsigned int enabled:1; | |
93 | ||
94 | uint64_t user_token; /* User-provided token. */ | |
95 | }; | |
96 | ||
97 | struct lttng_event_enabler { | |
98 | struct lttng_enabler base; | |
99 | struct list_head node; /* per-session list of enablers */ | |
100 | struct lttng_channel *chan; | |
101 | }; | |
102 | ||
103 | struct lttng_event_notifier_enabler { | |
104 | struct lttng_enabler base; | |
105 | uint64_t error_counter_index; | |
106 | struct list_head node; /* List of event_notifier enablers */ | |
107 | struct lttng_event_notifier_group *group; | |
108 | ||
109 | /* head list of struct lttng_bytecode_node */ | |
110 | struct list_head capture_bytecode_head; | |
111 | uint64_t num_captures; | |
112 | }; | |
113 | ||
437d5aa5 MD |
114 | static inline |
115 | const struct lttng_kernel_type_integer *lttng_kernel_get_type_integer(const struct lttng_kernel_type_common *type) | |
116 | { | |
117 | if (type->type != lttng_kernel_type_integer) | |
118 | return NULL; | |
119 | return container_of(type, const struct lttng_kernel_type_integer, parent); | |
120 | } | |
121 | ||
122 | static inline | |
123 | const struct lttng_kernel_type_string *lttng_kernel_get_type_string(const struct lttng_kernel_type_common *type) | |
124 | { | |
125 | if (type->type != lttng_kernel_type_string) | |
126 | return NULL; | |
127 | return container_of(type, const struct lttng_kernel_type_string, parent); | |
128 | } | |
129 | ||
130 | static inline | |
131 | const struct lttng_kernel_type_enum *lttng_kernel_get_type_enum(const struct lttng_kernel_type_common *type) | |
132 | { | |
133 | if (type->type != lttng_kernel_type_enum) | |
134 | return NULL; | |
135 | return container_of(type, const struct lttng_kernel_type_enum, parent); | |
136 | } | |
137 | ||
138 | static inline | |
139 | const struct lttng_kernel_type_array *lttng_kernel_get_type_array(const struct lttng_kernel_type_common *type) | |
140 | { | |
141 | if (type->type != lttng_kernel_type_array) | |
142 | return NULL; | |
143 | return container_of(type, const struct lttng_kernel_type_array, parent); | |
144 | } | |
145 | ||
146 | static inline | |
147 | const struct lttng_kernel_type_sequence *lttng_kernel_get_type_sequence(const struct lttng_kernel_type_common *type) | |
148 | { | |
149 | if (type->type != lttng_kernel_type_sequence) | |
150 | return NULL; | |
151 | return container_of(type, const struct lttng_kernel_type_sequence, parent); | |
152 | } | |
153 | ||
154 | static inline | |
155 | const struct lttng_kernel_type_struct *lttng_kernel_get_type_struct(const struct lttng_kernel_type_common *type) | |
156 | { | |
157 | if (type->type != lttng_kernel_type_struct) | |
158 | return NULL; | |
159 | return container_of(type, const struct lttng_kernel_type_struct, parent); | |
160 | } | |
161 | ||
162 | static inline | |
163 | const struct lttng_kernel_type_variant *lttng_kernel_get_type_variant(const struct lttng_kernel_type_common *type) | |
164 | { | |
165 | if (type->type != lttng_kernel_type_variant) | |
166 | return NULL; | |
167 | return container_of(type, const struct lttng_kernel_type_variant, parent); | |
168 | } | |
169 | ||
170 | static inline bool lttng_kernel_type_is_bytewise_integer(const struct lttng_kernel_type_common *type) | |
171 | { | |
172 | const struct lttng_kernel_type_integer *type_integer = lttng_kernel_get_type_integer(type); | |
173 | ||
174 | if (!type_integer) | |
175 | return false; | |
176 | switch (type_integer->size) { | |
177 | case 8: /* Fall-through. */ | |
178 | case 16: /* Fall-through. */ | |
179 | case 32: /* Fall-through. */ | |
180 | case 64: | |
181 | break; | |
182 | default: | |
183 | return false; | |
184 | } | |
185 | return true; | |
186 | } | |
187 | ||
8a445457 MD |
188 | int lttng_kernel_interpret_event_filter(const struct lttng_kernel_event_common *event, |
189 | const char *interpreter_stack_data, | |
190 | struct lttng_probe_ctx *probe_ctx, | |
191 | void *event_filter_ctx); | |
192 | ||
5e08a34f MD |
193 | static inline |
194 | struct lttng_enabler *lttng_event_enabler_as_enabler( | |
195 | struct lttng_event_enabler *event_enabler) | |
196 | { | |
197 | return &event_enabler->base; | |
198 | } | |
199 | ||
200 | static inline | |
201 | struct lttng_enabler *lttng_event_notifier_enabler_as_enabler( | |
202 | struct lttng_event_notifier_enabler *event_notifier_enabler) | |
203 | { | |
204 | return &event_notifier_enabler->base; | |
205 | } | |
206 | ||
92bc1e23 | 207 | #endif /* _LTTNG_EVENTS_INTERNAL_H */ |