#include <lttng/events.h>
+struct lttng_kernel_event_common_private {
+ struct lttng_kernel_event_common *pub; /* Public event interface */
+
+ const struct lttng_kernel_event_desc *desc;
+ /* Backward references: list of lttng_enabler_ref (ref to enablers) */
+ struct list_head enablers_ref_head;
+ int registered; /* has reg'd tracepoint probe */
+ uint64_t user_token;
+
+ int has_enablers_without_filter_bytecode;
+ /* list of struct lttng_bytecode_runtime, sorted by seqnum */
+ struct list_head filter_bytecode_runtime_head;
+ enum lttng_kernel_abi_instrumentation instrumentation;
+ /* Selected by instrumentation */
+ union {
+ struct lttng_kprobe kprobe;
+ struct lttng_uprobe uprobe;
+ struct {
+ struct lttng_krp *lttng_krp;
+ char *symbol_name;
+ } kretprobe;
+ struct {
+ enum lttng_syscall_entryexit entryexit;
+ enum lttng_syscall_abi abi;
+ struct hlist_node node; /* chain registered syscall event_notifier */
+ unsigned int syscall_id;
+ } syscall;
+ } u;
+};
+
+struct lttng_kernel_event_recorder_private {
+ struct lttng_kernel_event_common_private parent;
+
+ struct lttng_kernel_event_recorder *pub; /* Public event interface */
+ struct list_head node; /* Event recorder list */
+ struct hlist_node hlist; /* Hash table of event recorders */
+ struct lttng_kernel_ctx *ctx;
+ unsigned int id;
+ unsigned int metadata_dumped:1;
+};
+
+struct lttng_kernel_event_notifier_private {
+ struct lttng_kernel_event_common_private parent;
+
+ struct lttng_kernel_event_notifier *pub; /* Public event notifier interface */
+ struct lttng_event_notifier_group *group; /* weak ref */
+ size_t num_captures; /* Needed to allocate the msgpack array. */
+ uint64_t error_counter_index;
+ struct list_head node; /* Event notifier list */
+ struct hlist_node hlist; /* Hash table of event notifiers */
+ struct list_head capture_bytecode_runtime_head;
+
+};
+
+enum lttng_kernel_bytecode_interpreter_ret {
+ LTTNG_KERNEL_BYTECODE_INTERPRETER_ERROR = -1,
+ LTTNG_KERNEL_BYTECODE_INTERPRETER_OK = 0,
+};
+
+enum lttng_kernel_bytecode_filter_result {
+ LTTNG_KERNEL_BYTECODE_FILTER_ACCEPT = 0,
+ LTTNG_KERNEL_BYTECODE_FILTER_REJECT = 1,
+};
+
+struct lttng_kernel_bytecode_filter_ctx {
+ enum lttng_kernel_bytecode_filter_result result;
+};
+
+/*
+ * Enabler field, within whatever object is enabling an event. Target of
+ * backward reference.
+ */
+struct lttng_enabler {
+ enum lttng_enabler_format_type format_type;
+
+ /* head list of struct lttng_bytecode_node */
+ struct list_head filter_bytecode_head;
+
+ struct lttng_kernel_abi_event event_param;
+ unsigned int enabled:1;
+
+ uint64_t user_token; /* User-provided token. */
+};
+
+struct lttng_event_enabler {
+ struct lttng_enabler base;
+ struct list_head node; /* per-session list of enablers */
+ struct lttng_channel *chan;
+};
+
+struct lttng_event_notifier_enabler {
+ struct lttng_enabler base;
+ uint64_t error_counter_index;
+ struct list_head node; /* List of event_notifier enablers */
+ struct lttng_event_notifier_group *group;
+
+ /* head list of struct lttng_bytecode_node */
+ struct list_head capture_bytecode_head;
+ uint64_t num_captures;
+};
+
+struct lttng_ctx_value {
+ union {
+ int64_t s64;
+ const char *str;
+ double d;
+ } u;
+};
+
+/*
+ * We need to keep this perf counter field separately from struct
+ * lttng_kernel_ctx_field because cpu hotplug needs fixed-location addresses.
+ */
+struct lttng_perf_counter_field {
+#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,10,0))
+ struct lttng_cpuhp_node cpuhp_prepare;
+ struct lttng_cpuhp_node cpuhp_online;
+#else
+ struct notifier_block nb;
+ int hp_enable;
+#endif
+ struct perf_event_attr *attr;
+ struct perf_event **e; /* per-cpu array */
+ char *name;
+ struct lttng_kernel_event_field *event_field;
+};
+
+struct lttng_kernel_ctx_field {
+ const struct lttng_kernel_event_field *event_field;
+ size_t (*get_size)(void *priv, struct lttng_probe_ctx *probe_ctx,
+ size_t offset);
+ void (*record)(void *priv, struct lttng_probe_ctx *probe_ctx,
+ struct lib_ring_buffer_ctx *ctx,
+ struct lttng_channel *chan);
+ void (*get_value)(void *priv, struct lttng_probe_ctx *probe_ctx,
+ struct lttng_ctx_value *value);
+ void (*destroy)(void *priv);
+ void *priv;
+};
+
+struct lttng_kernel_ctx {
+ struct lttng_kernel_ctx_field *fields;
+ unsigned int nr_fields;
+ unsigned int allocated_fields;
+ size_t largest_align; /* in bytes */
+};
+
+extern struct lttng_kernel_ctx *lttng_static_ctx;
+
static inline
const struct lttng_kernel_type_integer *lttng_kernel_get_type_integer(const struct lttng_kernel_type_common *type)
{
return true;
}
+int lttng_kernel_interpret_event_filter(const struct lttng_kernel_event_common *event,
+ const char *interpreter_stack_data,
+ struct lttng_probe_ctx *probe_ctx,
+ void *event_filter_ctx);
+
+static inline
+struct lttng_enabler *lttng_event_enabler_as_enabler(
+ struct lttng_event_enabler *event_enabler)
+{
+ return &event_enabler->base;
+}
+
+static inline
+struct lttng_enabler *lttng_event_notifier_enabler_as_enabler(
+ struct lttng_event_notifier_enabler *event_notifier_enabler)
+{
+ return &event_notifier_enabler->base;
+}
+
+int lttng_context_init(void);
+void lttng_context_exit(void);
+int lttng_kernel_context_append(struct lttng_kernel_ctx **ctx_p,
+ const struct lttng_kernel_ctx_field *f);
+void lttng_kernel_context_remove_last(struct lttng_kernel_ctx **ctx_p);
+struct lttng_kernel_ctx_field *lttng_kernel_get_context_field_from_index(struct lttng_kernel_ctx *ctx,
+ size_t index);
+int lttng_kernel_find_context(struct lttng_kernel_ctx *ctx, const char *name);
+int lttng_kernel_get_context_index(struct lttng_kernel_ctx *ctx, const char *name);
+void lttng_kernel_destroy_context(struct lttng_kernel_ctx *ctx);
+int lttng_add_pid_to_ctx(struct lttng_kernel_ctx **ctx);
+int lttng_add_cpu_id_to_ctx(struct lttng_kernel_ctx **ctx);
+int lttng_add_procname_to_ctx(struct lttng_kernel_ctx **ctx);
+int lttng_add_prio_to_ctx(struct lttng_kernel_ctx **ctx);
+int lttng_add_nice_to_ctx(struct lttng_kernel_ctx **ctx);
+int lttng_add_vpid_to_ctx(struct lttng_kernel_ctx **ctx);
+int lttng_add_tid_to_ctx(struct lttng_kernel_ctx **ctx);
+int lttng_add_vtid_to_ctx(struct lttng_kernel_ctx **ctx);
+int lttng_add_ppid_to_ctx(struct lttng_kernel_ctx **ctx);
+int lttng_add_vppid_to_ctx(struct lttng_kernel_ctx **ctx);
+int lttng_add_hostname_to_ctx(struct lttng_kernel_ctx **ctx);
+int lttng_add_interruptible_to_ctx(struct lttng_kernel_ctx **ctx);
+int lttng_add_need_reschedule_to_ctx(struct lttng_kernel_ctx **ctx);
+#if defined(CONFIG_PREEMPT_RT_FULL) || defined(CONFIG_PREEMPT)
+int lttng_add_preemptible_to_ctx(struct lttng_kernel_ctx **ctx);
+#else
+static inline
+int lttng_add_preemptible_to_ctx(struct lttng_kernel_ctx **ctx)
+{
+ return -ENOSYS;
+}
+#endif
+#ifdef CONFIG_PREEMPT_RT_FULL
+int lttng_add_migratable_to_ctx(struct lttng_kernel_ctx **ctx);
+#else
+static inline
+int lttng_add_migratable_to_ctx(struct lttng_kernel_ctx **ctx)
+{
+ return -ENOSYS;
+}
+#endif
+
+int lttng_add_callstack_to_ctx(struct lttng_kernel_ctx **ctx, int type);
+
+#if defined(CONFIG_CGROUPS) && \
+ ((LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,6,0)) || \
+ LTTNG_UBUNTU_KERNEL_RANGE(4,4,0,0, 4,5,0,0))
+int lttng_add_cgroup_ns_to_ctx(struct lttng_kernel_ctx **ctx);
+#else
+static inline
+int lttng_add_cgroup_ns_to_ctx(struct lttng_kernel_ctx **ctx)
+{
+ return -ENOSYS;
+}
+#endif
+
+#if defined(CONFIG_IPC_NS) && \
+ (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
+int lttng_add_ipc_ns_to_ctx(struct lttng_kernel_ctx **ctx);
+#else
+static inline
+int lttng_add_ipc_ns_to_ctx(struct lttng_kernel_ctx **ctx)
+{
+ return -ENOSYS;
+}
+#endif
+
+#if !defined(LTTNG_MNT_NS_MISSING_HEADER) && \
+ (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
+int lttng_add_mnt_ns_to_ctx(struct lttng_kernel_ctx **ctx);
+#else
+static inline
+int lttng_add_mnt_ns_to_ctx(struct lttng_kernel_ctx **ctx)
+{
+ return -ENOSYS;
+}
+#endif
+
+#if defined(CONFIG_NET_NS) && \
+ (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
+int lttng_add_net_ns_to_ctx(struct lttng_kernel_ctx **ctx);
+#else
+static inline
+int lttng_add_net_ns_to_ctx(struct lttng_kernel_ctx **ctx)
+{
+ return -ENOSYS;
+}
+#endif
+
+#if defined(CONFIG_PID_NS) && \
+ (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
+int lttng_add_pid_ns_to_ctx(struct lttng_kernel_ctx **ctx);
+#else
+static inline
+int lttng_add_pid_ns_to_ctx(struct lttng_kernel_ctx **ctx)
+{
+ return -ENOSYS;
+}
+#endif
+
+#if defined(CONFIG_USER_NS) && \
+ (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
+int lttng_add_user_ns_to_ctx(struct lttng_kernel_ctx **ctx);
+#else
+static inline
+int lttng_add_user_ns_to_ctx(struct lttng_kernel_ctx **ctx)
+{
+ return -ENOSYS;
+}
+#endif
+
+#if defined(CONFIG_UTS_NS) && \
+ (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
+int lttng_add_uts_ns_to_ctx(struct lttng_kernel_ctx **ctx);
+#else
+static inline
+int lttng_add_uts_ns_to_ctx(struct lttng_kernel_ctx **ctx)
+{
+ return -ENOSYS;
+}
+#endif
+
+#if defined(CONFIG_TIME_NS) && \
+ (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,6,0))
+int lttng_add_time_ns_to_ctx(struct lttng_kernel_ctx **ctx);
+#else
+static inline
+int lttng_add_time_ns_to_ctx(struct lttng_kernel_ctx **ctx)
+{
+ return -ENOSYS;
+}
+#endif
+
+int lttng_add_uid_to_ctx(struct lttng_kernel_ctx **ctx);
+int lttng_add_euid_to_ctx(struct lttng_kernel_ctx **ctx);
+int lttng_add_suid_to_ctx(struct lttng_kernel_ctx **ctx);
+int lttng_add_gid_to_ctx(struct lttng_kernel_ctx **ctx);
+int lttng_add_egid_to_ctx(struct lttng_kernel_ctx **ctx);
+int lttng_add_sgid_to_ctx(struct lttng_kernel_ctx **ctx);
+int lttng_add_vuid_to_ctx(struct lttng_kernel_ctx **ctx);
+int lttng_add_veuid_to_ctx(struct lttng_kernel_ctx **ctx);
+int lttng_add_vsuid_to_ctx(struct lttng_kernel_ctx **ctx);
+int lttng_add_vgid_to_ctx(struct lttng_kernel_ctx **ctx);
+int lttng_add_vegid_to_ctx(struct lttng_kernel_ctx **ctx);
+int lttng_add_vsgid_to_ctx(struct lttng_kernel_ctx **ctx);
+
+#if defined(CONFIG_PERF_EVENTS)
+int lttng_add_perf_counter_to_ctx(uint32_t type,
+ uint64_t config,
+ const char *name,
+ struct lttng_kernel_ctx **ctx);
+int lttng_cpuhp_perf_counter_online(unsigned int cpu,
+ struct lttng_cpuhp_node *node);
+int lttng_cpuhp_perf_counter_dead(unsigned int cpu,
+ struct lttng_cpuhp_node *node);
+#else
+static inline
+int lttng_add_perf_counter_to_ctx(uint32_t type,
+ uint64_t config,
+ const char *name,
+ struct lttng_kernel_ctx **ctx)
+{
+ return -ENOSYS;
+}
+static inline
+int lttng_cpuhp_perf_counter_online(unsigned int cpu,
+ struct lttng_cpuhp_node *node)
+{
+ return 0;
+}
+static inline
+int lttng_cpuhp_perf_counter_dead(unsigned int cpu,
+ struct lttng_cpuhp_node *node)
+{
+ return 0;
+}
+#endif
+
+
+
+#define lttng_kernel_static_ctx_field(_event_field, _get_size, _record, _get_value, _destroy, _priv) \
+ __LTTNG_COMPOUND_LITERAL(const struct lttng_kernel_ctx_field, { \
+ .event_field = (_event_field), \
+ .get_size = (_get_size), \
+ .record = (_record), \
+ .get_value = (_get_value), \
+ .destroy = (_destroy), \
+ .priv = (_priv), \
+ })
+
#endif /* _LTTNG_EVENTS_INTERNAL_H */