| 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 | |
| 11 | #include <lttng/events.h> |
| 12 | |
| 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; |
| 23 | /* list of struct lttng_bytecode_runtime, sorted by seqnum */ |
| 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 | |
| 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 | |
| 81 | static inline |
| 82 | const struct lttng_kernel_type_integer *lttng_kernel_get_type_integer(const struct lttng_kernel_type_common *type) |
| 83 | { |
| 84 | if (type->type != lttng_kernel_type_integer) |
| 85 | return NULL; |
| 86 | return container_of(type, const struct lttng_kernel_type_integer, parent); |
| 87 | } |
| 88 | |
| 89 | static inline |
| 90 | const struct lttng_kernel_type_string *lttng_kernel_get_type_string(const struct lttng_kernel_type_common *type) |
| 91 | { |
| 92 | if (type->type != lttng_kernel_type_string) |
| 93 | return NULL; |
| 94 | return container_of(type, const struct lttng_kernel_type_string, parent); |
| 95 | } |
| 96 | |
| 97 | static inline |
| 98 | const struct lttng_kernel_type_enum *lttng_kernel_get_type_enum(const struct lttng_kernel_type_common *type) |
| 99 | { |
| 100 | if (type->type != lttng_kernel_type_enum) |
| 101 | return NULL; |
| 102 | return container_of(type, const struct lttng_kernel_type_enum, parent); |
| 103 | } |
| 104 | |
| 105 | static inline |
| 106 | const struct lttng_kernel_type_array *lttng_kernel_get_type_array(const struct lttng_kernel_type_common *type) |
| 107 | { |
| 108 | if (type->type != lttng_kernel_type_array) |
| 109 | return NULL; |
| 110 | return container_of(type, const struct lttng_kernel_type_array, parent); |
| 111 | } |
| 112 | |
| 113 | static inline |
| 114 | const struct lttng_kernel_type_sequence *lttng_kernel_get_type_sequence(const struct lttng_kernel_type_common *type) |
| 115 | { |
| 116 | if (type->type != lttng_kernel_type_sequence) |
| 117 | return NULL; |
| 118 | return container_of(type, const struct lttng_kernel_type_sequence, parent); |
| 119 | } |
| 120 | |
| 121 | static inline |
| 122 | const struct lttng_kernel_type_struct *lttng_kernel_get_type_struct(const struct lttng_kernel_type_common *type) |
| 123 | { |
| 124 | if (type->type != lttng_kernel_type_struct) |
| 125 | return NULL; |
| 126 | return container_of(type, const struct lttng_kernel_type_struct, parent); |
| 127 | } |
| 128 | |
| 129 | static inline |
| 130 | const struct lttng_kernel_type_variant *lttng_kernel_get_type_variant(const struct lttng_kernel_type_common *type) |
| 131 | { |
| 132 | if (type->type != lttng_kernel_type_variant) |
| 133 | return NULL; |
| 134 | return container_of(type, const struct lttng_kernel_type_variant, parent); |
| 135 | } |
| 136 | |
| 137 | static inline bool lttng_kernel_type_is_bytewise_integer(const struct lttng_kernel_type_common *type) |
| 138 | { |
| 139 | const struct lttng_kernel_type_integer *type_integer = lttng_kernel_get_type_integer(type); |
| 140 | |
| 141 | if (!type_integer) |
| 142 | return false; |
| 143 | switch (type_integer->size) { |
| 144 | case 8: /* Fall-through. */ |
| 145 | case 16: /* Fall-through. */ |
| 146 | case 32: /* Fall-through. */ |
| 147 | case 64: |
| 148 | break; |
| 149 | default: |
| 150 | return false; |
| 151 | } |
| 152 | return true; |
| 153 | } |
| 154 | |
| 155 | int lttng_kernel_interpret_event_filter(const struct lttng_kernel_event_common *event, |
| 156 | const char *interpreter_stack_data, |
| 157 | struct lttng_probe_ctx *probe_ctx, |
| 158 | void *event_filter_ctx); |
| 159 | |
| 160 | #endif /* _LTTNG_EVENTS_INTERNAL_H */ |