X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;f=include%2Flttng%2Fevents.h;h=3a5f94d339339e7102a64c070508173232b8d7d8;hb=7c1ba2cad7412f74a10e0a7aabda67f6d649e15c;hp=2ceec317d604edc11c0a12d7b5cd3fd7b110ab86;hpb=9d993668c1e98fa676ea33432bf0d89fd33a0599;p=lttng-modules.git

diff --git a/include/lttng/events.h b/include/lttng/events.h
index 2ceec317..3a5f94d3 100644
--- a/include/lttng/events.h
+++ b/include/lttng/events.h
@@ -26,12 +26,8 @@
 #define lttng_is_signed_type(type)	(((type) -1) < (type) 1)
 
 struct lttng_channel;
-struct lttng_session;
-struct lttng_metadata_cache;
-struct lib_ring_buffer_ctx;
-struct perf_event;
-struct perf_event_attr;
-struct lib_ring_buffer_config;
+struct lttng_kernel_session;
+struct lttng_kernel_ring_buffer_ctx;
 
 /* Type description */
 
@@ -109,7 +105,7 @@ struct lttng_kernel_type_array {
 
 struct lttng_kernel_type_sequence {
 	struct lttng_kernel_type_common parent;
-	const char *length_name;	/* Length field name. */
+	const char *length_name;	/* Length field name. If NULL, use previous field. */
 	const struct lttng_kernel_type_common *elem_type;
 	unsigned int alignment;		/* Alignment before elements. */
 	enum lttng_kernel_string_encoding encoding;
@@ -124,7 +120,7 @@ struct lttng_kernel_type_struct {
 
 struct lttng_kernel_type_variant {
 	struct lttng_kernel_type_common parent;
-	const char *tag_name;
+	const char *tag_name;		/* Tag field name. If NULL, use previous field. */
 	const struct lttng_kernel_event_field **choices; /* Array of pointers to fields. */
 	unsigned int nr_choices;
 	unsigned int alignment;
@@ -246,17 +242,6 @@ struct lttng_kernel_event_field {
 		_fields											\
 	)
 
-#define lttng_kernel_static_ctx_field(_event_field, _get_size, _get_size_arg, _record, _get_value, _destroy, _priv) \
-	__LTTNG_COMPOUND_LITERAL(const struct lttng_kernel_ctx_field, {					\
-		.event_field = (_event_field),								\
-		.get_size = (_get_size),								\
-		.get_size_arg = (_get_size_arg),							\
-		.record = (_record),									\
-		.get_value = (_get_value),								\
-		.destroy = (_destroy),									\
-		.priv = (_priv),									\
-	})
-
 #define lttng_kernel_static_enum_entry_value(_string, _value)						\
 	__LTTNG_COMPOUND_LITERAL(const struct lttng_kernel_enum_entry, {				\
 		.start = {										\
@@ -303,58 +288,11 @@ struct lttng_kernel_event_field {
 		}											\
 	}),
 
-union lttng_ctx_value {
-	int64_t s64;
-	const char *str;
-	double d;
-};
-
-/*
- * 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_probe_ctx {
+struct lttng_kernel_probe_ctx {
 	struct lttng_kernel_event_common *event;
 	uint8_t interruptible;
 };
 
-struct lttng_kernel_ctx_field {
-	const struct lttng_kernel_event_field *event_field;
-	size_t (*get_size)(size_t offset);
-	size_t (*get_size_arg)(size_t offset, struct lttng_kernel_ctx_field *field,
-	                       struct lib_ring_buffer_ctx *ctx,
-	                       struct lttng_channel *chan);
-	void (*record)(struct lttng_kernel_ctx_field *field,
-		       struct lib_ring_buffer_ctx *ctx,
-		       struct lttng_channel *chan);
-	void (*get_value)(struct lttng_kernel_ctx_field *field,
-			 struct lttng_probe_ctx *lttng_probe_ctx,
-			 union lttng_ctx_value *value);
-	void (*destroy)(struct lttng_kernel_ctx_field *field);
-	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 */
-};
-
 struct lttng_kernel_event_desc {
 	const char *event_name;		/* lttng-modules name */
 	const char *event_kname;	/* Linux kernel name (tracepoints) */
@@ -374,86 +312,12 @@ struct lttng_kernel_probe_desc {
 	int lazy;				/* lazy registration */
 };
 
-struct lttng_krp;				/* Kretprobe handling */
-
-enum lttng_bytecode_node_type {
-	LTTNG_BYTECODE_NODE_TYPE_FILTER,
-	LTTNG_BYTECODE_NODE_TYPE_CAPTURE,
-};
-
-struct lttng_bytecode_node {
-	enum lttng_bytecode_node_type type;
-	struct list_head node;
-	struct lttng_enabler *enabler;
-	struct {
-		uint32_t len;
-		uint32_t reloc_offset;
-		uint64_t seqnum;
-		char data[];
-	} bc;
-};
-
-/*
- * Bytecode interpreter return value masks.
- */
-enum lttng_bytecode_interpreter_ret {
-	LTTNG_INTERPRETER_DISCARD = 0,
-	LTTNG_INTERPRETER_RECORD_FLAG = (1ULL << 0),
-	/* Other bits are kept for future use. */
-};
-
-struct lttng_interpreter_output;
-
-struct lttng_bytecode_runtime {
-	/* Associated bytecode */
-	struct lttng_bytecode_node *bc;
-	union {
-		uint64_t (*filter)(void *filter_data,
-				struct lttng_probe_ctx *lttng_probe_ctx,
-				const char *filter_stack_data);
-		uint64_t (*capture)(void *filter_data,
-				struct lttng_probe_ctx *lttng_probe_ctx,
-				const char *capture_stack_data,
-				struct lttng_interpreter_output *output);
-	} interpreter_funcs;
-	int link_failed;
-	struct list_head node;	/* list of bytecode runtime in event */
-	struct lttng_kernel_ctx *ctx;
-};
-
 /*
- * Objects in a linked-list of enablers, owned by an event.
+ * Result of the run_filter() callback.
  */
-struct lttng_enabler_ref {
-	struct list_head node;			/* enabler ref list */
-	struct lttng_enabler *ref;		/* backward ref */
-};
-
-struct lttng_uprobe_handler {
-	struct lttng_kernel_event_common *event;
-	loff_t offset;
-	struct uprobe_consumer up_consumer;
-	struct list_head node;
-};
-
-struct lttng_kprobe {
-	struct kprobe kp;
-	char *symbol_name;
-};
-
-struct lttng_uprobe {
-	struct inode *inode;
-	struct list_head head;
-};
-
-enum lttng_syscall_entryexit {
-	LTTNG_SYSCALL_ENTRY,
-	LTTNG_SYSCALL_EXIT,
-};
-
-enum lttng_syscall_abi {
-	LTTNG_SYSCALL_ABI_NATIVE,
-	LTTNG_SYSCALL_ABI_COMPAT,
+enum lttng_kernel_event_filter_result {
+	LTTNG_KERNEL_EVENT_FILTER_ACCEPT = 0,
+	LTTNG_KERNEL_EVENT_FILTER_REJECT = 1,
 };
 
 struct lttng_kernel_event_common_private;
@@ -471,8 +335,9 @@ struct lttng_kernel_event_common {
 
 	int enabled;
 	int eval_filter;				/* Need to evaluate filters */
-	int (*run_filter)(struct lttng_kernel_event_common *event,
+	int (*run_filter)(const struct lttng_kernel_event_common *event,
 		const char *stack_data,
+		struct lttng_kernel_probe_ctx *probe_ctx,
 		void *filter_ctx);
 };
 
@@ -497,165 +362,28 @@ struct lttng_kernel_event_notifier {
 
 	int eval_capture;				/* Need to evaluate capture */
 	void (*notification_send)(struct lttng_kernel_event_notifier *event_notifier,
-		struct lttng_probe_ctx *probe_ctx,
 		const char *stack_data,
+		struct lttng_kernel_probe_ctx *probe_ctx,
 		struct lttng_kernel_notification_ctx *notif_ctx);
 };
 
-enum lttng_enabler_format_type {
-	LTTNG_ENABLER_FORMAT_STAR_GLOB,
-	LTTNG_ENABLER_FORMAT_NAME,
-};
-
-/*
- * 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_kernel_channel_buffer_ops {
+	struct lttng_kernel_channel_buffer_ops_private *priv;	/* Private channel buffer ops interface. */
 
-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;
-};
-
-
-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;
-}
-
-struct lttng_channel_ops {
-	struct channel *(*channel_create)(const char *name,
-				void *priv,
-				void *buf_addr,
-				size_t subbuf_size, size_t num_subbuf,
-				unsigned int switch_timer_interval,
-				unsigned int read_timer_interval);
-	void (*channel_destroy)(struct channel *chan);
-	struct lib_ring_buffer *(*buffer_read_open)(struct channel *chan);
-	int (*buffer_has_read_closed_stream)(struct channel *chan);
-	void (*buffer_read_close)(struct lib_ring_buffer *buf);
-	int (*event_reserve)(struct lib_ring_buffer_ctx *ctx,
-			     uint32_t event_id);
-	void (*event_commit)(struct lib_ring_buffer_ctx *ctx);
-	void (*event_write)(struct lib_ring_buffer_ctx *ctx, const void *src,
+	int (*event_reserve)(struct lttng_kernel_ring_buffer_ctx *ctx);
+	void (*event_commit)(struct lttng_kernel_ring_buffer_ctx *ctx);
+	void (*event_write)(struct lttng_kernel_ring_buffer_ctx *ctx, const void *src,
 			    size_t len);
-	void (*event_write_from_user)(struct lib_ring_buffer_ctx *ctx,
+	void (*event_write_from_user)(struct lttng_kernel_ring_buffer_ctx *ctx,
 				      const void *src, size_t len);
-	void (*event_memset)(struct lib_ring_buffer_ctx *ctx,
+	void (*event_memset)(struct lttng_kernel_ring_buffer_ctx *ctx,
 			     int c, size_t len);
-	void (*event_strcpy)(struct lib_ring_buffer_ctx *ctx, const char *src,
+	void (*event_strcpy)(struct lttng_kernel_ring_buffer_ctx *ctx, const char *src,
 			     size_t len);
-	void (*event_strcpy_from_user)(struct lib_ring_buffer_ctx *ctx,
+	void (*event_strcpy_from_user)(struct lttng_kernel_ring_buffer_ctx *ctx,
 				       const char __user *src, size_t len);
-	/*
-	 * packet_avail_size returns the available size in the current
-	 * packet. Note that the size returned is only a hint, since it
-	 * may change due to concurrent writes.
-	 */
-	size_t (*packet_avail_size)(struct channel *chan);
-	wait_queue_head_t *(*get_writer_buf_wait_queue)(struct channel *chan, int cpu);
-	wait_queue_head_t *(*get_hp_wait_queue)(struct channel *chan);
-	int (*is_finalized)(struct channel *chan);
-	int (*is_disabled)(struct channel *chan);
-	int (*timestamp_begin) (const struct lib_ring_buffer_config *config,
-			struct lib_ring_buffer *bufb,
-			uint64_t *timestamp_begin);
-	int (*timestamp_end) (const struct lib_ring_buffer_config *config,
-			struct lib_ring_buffer *bufb,
-			uint64_t *timestamp_end);
-	int (*events_discarded) (const struct lib_ring_buffer_config *config,
-			struct lib_ring_buffer *bufb,
-			uint64_t *events_discarded);
-	int (*content_size) (const struct lib_ring_buffer_config *config,
-			struct lib_ring_buffer *bufb,
-			uint64_t *content_size);
-	int (*packet_size) (const struct lib_ring_buffer_config *config,
-			struct lib_ring_buffer *bufb,
-			uint64_t *packet_size);
-	int (*stream_id) (const struct lib_ring_buffer_config *config,
-			struct lib_ring_buffer *bufb,
-			uint64_t *stream_id);
-	int (*current_timestamp) (const struct lib_ring_buffer_config *config,
-			struct lib_ring_buffer *bufb,
-			uint64_t *ts);
-	int (*sequence_number) (const struct lib_ring_buffer_config *config,
-			struct lib_ring_buffer *bufb,
-			uint64_t *seq);
-	int (*instance_id) (const struct lib_ring_buffer_config *config,
-			struct lib_ring_buffer *bufb,
-			uint64_t *id);
 };
 
-struct lttng_counter_ops {
-	struct lib_counter *(*counter_create)(size_t nr_dimensions,
-			const size_t *max_nr_elem,	/* for each dimension */
-			int64_t global_sum_step);
-	void (*counter_destroy)(struct lib_counter *counter);
-	int (*counter_add)(struct lib_counter *counter, const size_t *dimension_indexes,
-			int64_t v);
-	/*
-	 * counter_read reads a specific cpu's counter if @cpu >= 0, or
-	 * the global aggregation counter if @cpu == -1.
-	 */
-	int (*counter_read)(struct lib_counter *counter, const size_t *dimension_indexes, int cpu,
-			 int64_t *value, bool *overflow, bool *underflow);
-	/*
-	 * counter_aggregate returns the total sum of all per-cpu counters and
-	 * the global aggregation counter.
-	 */
-	int (*counter_aggregate)(struct lib_counter *counter, const size_t *dimension_indexes,
-			int64_t *value, bool *overflow, bool *underflow);
-	int (*counter_clear)(struct lib_counter *counter, const size_t *dimension_indexes);
-};
-
-struct lttng_transport {
-	char *name;
-	struct module *owner;
-	struct list_head node;
-	struct lttng_channel_ops ops;
-};
-
-struct lttng_counter_transport {
-	char *name;
-	struct module *owner;
-	struct list_head node;
-	struct lttng_counter_ops ops;
-};
-
-struct lttng_syscall_filter;
-
 #define LTTNG_EVENT_HT_BITS		12
 #define LTTNG_EVENT_HT_SIZE		(1U << LTTNG_EVENT_HT_BITS)
 
@@ -676,11 +404,11 @@ struct lttng_channel {
 	int enabled;
 	struct lttng_kernel_ctx *ctx;
 	/* Event ID management */
-	struct lttng_session *session;
+	struct lttng_kernel_session *session;
 	struct file *file;		/* File associated to channel */
 	unsigned int free_event_id;	/* Next event ID to allocate */
 	struct list_head list;		/* Channel list */
-	struct lttng_channel_ops *ops;
+	struct lttng_kernel_channel_buffer_ops *ops;
 	struct lttng_transport *transport;
 	struct hlist_head *sc_table;	/* for syscall tracing */
 	struct hlist_head *compat_sc_table;
@@ -701,19 +429,6 @@ struct lttng_channel {
 		tstate:1;		/* Transient enable state */
 };
 
-struct lttng_metadata_stream {
-	void *priv;			/* Ring buffer private data */
-	struct lttng_metadata_cache *metadata_cache;
-	unsigned int metadata_in;	/* Bytes read from the cache */
-	unsigned int metadata_out;	/* Bytes consumed from stream */
-	int finalized;			/* Has channel been finalized */
-	wait_queue_head_t read_wait;	/* Reader buffer-level wait queue */
-	struct list_head list;		/* Stream list */
-	struct lttng_transport *transport;
-	uint64_t version;		/* Current version of the metadata cache */
-	bool coherent;			/* Stream in a coherent state */
-};
-
 #define LTTNG_DYNAMIC_LEN_STACK_SIZE	128
 
 struct lttng_dynamic_len_stack {
@@ -724,708 +439,40 @@ struct lttng_dynamic_len_stack {
 DECLARE_PER_CPU(struct lttng_dynamic_len_stack, lttng_dynamic_len_stack);
 
 /*
- * struct lttng_id_tracker declared in header due to deferencing of *v
+ * struct lttng_kernel_id_tracker declared in header due to deferencing of *v
  * in RCU_INITIALIZER(v).
  */
 #define LTTNG_ID_HASH_BITS	6
 #define LTTNG_ID_TABLE_SIZE	(1 << LTTNG_ID_HASH_BITS)
 
-enum tracker_type {
-	TRACKER_PID,
-	TRACKER_VPID,
-	TRACKER_UID,
-	TRACKER_VUID,
-	TRACKER_GID,
-	TRACKER_VGID,
-
-	TRACKER_UNKNOWN,
-};
-
-struct lttng_id_tracker_rcu {
+struct lttng_kernel_id_tracker_rcu {
 	struct hlist_head id_hash[LTTNG_ID_TABLE_SIZE];
 };
 
-struct lttng_id_tracker {
-	struct lttng_session *session;
-	enum tracker_type tracker_type;
-	struct lttng_id_tracker_rcu *p;	/* RCU dereferenced. */
-};
+struct lttng_kernel_id_tracker {
+	struct lttng_kernel_id_tracker_private *priv;	/* Private API */
 
-struct lttng_id_hash_node {
-	struct hlist_node hlist;
-	int id;
+	struct lttng_kernel_id_tracker_rcu *p;	/* RCU dereferenced. */
 };
 
-struct lttng_session {
-	int active;			/* Is trace session active ? */
-	int been_active;		/* Has trace session been active ? */
-	struct file *file;		/* File associated to session */
-	struct list_head chan;		/* Channel list head */
-	struct list_head events;	/* Event list head */
-	struct list_head list;		/* Session list */
-	unsigned int free_chan_id;	/* Next chan ID to allocate */
-	uuid_le uuid;			/* Trace session unique ID */
-	struct lttng_metadata_cache *metadata_cache;
-	struct lttng_id_tracker pid_tracker;
-	struct lttng_id_tracker vpid_tracker;
-	struct lttng_id_tracker uid_tracker;
-	struct lttng_id_tracker vuid_tracker;
-	struct lttng_id_tracker gid_tracker;
-	struct lttng_id_tracker vgid_tracker;
-	unsigned int metadata_dumped:1,
-		tstate:1;		/* Transient enable state */
-	/* List of event enablers */
-	struct list_head enablers_head;
-	/* Hash table of events */
-	struct lttng_event_ht events_ht;
-	char name[LTTNG_KERNEL_ABI_SESSION_NAME_LEN];
-	char creation_time[LTTNG_KERNEL_ABI_SESSION_CREATION_TIME_ISO8601_LEN];
-};
+struct lttng_kernel_session_private;
 
-struct lttng_counter {
-	struct file *file;		/* File associated to counter. */
-	struct file *owner;
-	struct lttng_counter_transport *transport;
-	struct lib_counter *counter;
-	struct lttng_counter_ops *ops;
-};
+struct lttng_kernel_session {
+	struct lttng_kernel_session_private *priv;	/* Private session interface */
 
-struct lttng_event_notifier_group {
-	struct file *file;		/* File associated to event notifier group */
-	struct file *notif_file;	/* File used to expose notifications to userspace. */
-	struct list_head node;		/* event notifier group list */
-	struct list_head enablers_head; /* List of enablers */
-	struct list_head event_notifiers_head; /* List of event notifier */
-	struct lttng_event_notifier_ht event_notifiers_ht; /* Hash table of event notifiers */
-	struct lttng_channel_ops *ops;
-	struct lttng_transport *transport;
-	struct channel *chan;		/* Ring buffer channel for event notifier group. */
-	struct lib_ring_buffer *buf;	/* Ring buffer for event notifier group. */
-	wait_queue_head_t read_wait;
-	struct irq_work wakeup_pending;	/* Pending wakeup irq work. */
-	struct lttng_kernel_event_notifier *sc_unknown;	/* for unknown syscalls */
-	struct lttng_kernel_event_notifier *sc_compat_unknown;
-
-	struct lttng_syscall_filter *sc_filter;
-
-	struct hlist_head *event_notifier_syscall_dispatch;
-	struct hlist_head *event_notifier_compat_syscall_dispatch;
-	struct hlist_head *event_notifier_exit_syscall_dispatch;
-	struct hlist_head *event_notifier_exit_compat_syscall_dispatch;
-
-	struct hlist_head event_notifier_unknown_syscall_dispatch;
-	struct hlist_head event_notifier_compat_unknown_syscall_dispatch;
-	struct hlist_head event_notifier_exit_unknown_syscall_dispatch;
-	struct hlist_head event_notifier_exit_compat_unknown_syscall_dispatch;
-
-	int syscall_all_entry;
-	int syscall_all_exit;
-
-	unsigned int sys_enter_registered:1, sys_exit_registered:1;
+	int active;			/* Is trace session active ? */
 
-	struct lttng_counter *error_counter;
-	size_t error_counter_len;
+	struct lttng_kernel_id_tracker pid_tracker;
+	struct lttng_kernel_id_tracker vpid_tracker;
+	struct lttng_kernel_id_tracker uid_tracker;
+	struct lttng_kernel_id_tracker vuid_tracker;
+	struct lttng_kernel_id_tracker gid_tracker;
+	struct lttng_kernel_id_tracker vgid_tracker;
 };
 
-struct lttng_metadata_cache {
-	char *data;			/* Metadata cache */
-	unsigned int cache_alloc;	/* Metadata allocated size (bytes) */
-	unsigned int metadata_written;	/* Number of bytes written in metadata cache */
-	atomic_t producing;		/* Metadata being produced (incomplete) */
-	struct kref refcount;		/* Metadata cache usage */
-	struct list_head metadata_stream;	/* Metadata stream list */
-	uuid_le uuid;			/* Trace session unique ID (copy) */
-	struct mutex lock;		/* Produce/consume lock */
-	uint64_t version;		/* Current version of the metadata */
-};
+int lttng_kernel_probe_register(struct lttng_kernel_probe_desc *desc);
+void lttng_kernel_probe_unregister(struct lttng_kernel_probe_desc *desc);
 
-void lttng_lock_sessions(void);
-void lttng_unlock_sessions(void);
-
-struct list_head *lttng_get_probe_list_head(void);
-
-struct lttng_event_enabler *lttng_event_enabler_create(
-		enum lttng_enabler_format_type format_type,
-		struct lttng_kernel_abi_event *event_param,
-		struct lttng_channel *chan);
-
-int lttng_event_enabler_enable(struct lttng_event_enabler *event_enabler);
-int lttng_event_enabler_disable(struct lttng_event_enabler *event_enabler);
-struct lttng_event_notifier_enabler *lttng_event_notifier_enabler_create(
-		struct lttng_event_notifier_group *event_notifier_group,
-		enum lttng_enabler_format_type format_type,
-		struct lttng_kernel_abi_event_notifier *event_notifier_param);
-
-int lttng_event_notifier_enabler_enable(
-		struct lttng_event_notifier_enabler *event_notifier_enabler);
-int lttng_event_notifier_enabler_disable(
-		struct lttng_event_notifier_enabler *event_notifier_enabler);
-int lttng_fix_pending_events(void);
-int lttng_fix_pending_event_notifiers(void);
-int lttng_session_active(void);
-bool lttng_event_notifier_active(void);
-
-struct lttng_session *lttng_session_create(void);
-int lttng_session_enable(struct lttng_session *session);
-int lttng_session_disable(struct lttng_session *session);
-void lttng_session_destroy(struct lttng_session *session);
-int lttng_session_metadata_regenerate(struct lttng_session *session);
-int lttng_session_statedump(struct lttng_session *session);
-void metadata_cache_destroy(struct kref *kref);
-
-struct lttng_counter *lttng_kernel_counter_create(
-		const char *counter_transport_name, size_t number_dimensions,
-		const size_t *dimensions_sizes);
-int lttng_kernel_counter_read(struct lttng_counter *counter,
-		const size_t *dimension_indexes, int32_t cpu,
-		int64_t *val, bool *overflow, bool *underflow);
-int lttng_kernel_counter_aggregate(struct lttng_counter *counter,
-		const size_t *dimension_indexes, int64_t *val,
-		bool *overflow, bool *underflow);
-int lttng_kernel_counter_clear(struct lttng_counter *counter,
-		const size_t *dimension_indexes);
-
-
-struct lttng_event_notifier_group *lttng_event_notifier_group_create(void);
-int lttng_event_notifier_group_create_error_counter(
-		struct file *event_notifier_group_file,
-		const struct lttng_kernel_abi_counter_conf *error_counter_conf);
-void lttng_event_notifier_group_destroy(
-		struct lttng_event_notifier_group *event_notifier_group);
-
-struct lttng_channel *lttng_channel_create(struct lttng_session *session,
-				       const char *transport_name,
-				       void *buf_addr,
-				       size_t subbuf_size, size_t num_subbuf,
-				       unsigned int switch_timer_interval,
-				       unsigned int read_timer_interval,
-				       enum channel_type channel_type);
-struct lttng_channel *lttng_global_channel_create(struct lttng_session *session,
-				       int overwrite, void *buf_addr,
-				       size_t subbuf_size, size_t num_subbuf,
-				       unsigned int switch_timer_interval,
-				       unsigned int read_timer_interval);
-
-void lttng_metadata_channel_destroy(struct lttng_channel *chan);
-struct lttng_kernel_event_recorder *lttng_kernel_event_recorder_create(struct lttng_channel *chan,
-				struct lttng_kernel_abi_event *event_param,
-				const struct lttng_kernel_event_desc *event_desc,
-				enum lttng_kernel_abi_instrumentation itype);
-struct lttng_kernel_event_recorder *_lttng_kernel_event_recorder_create(struct lttng_channel *chan,
-				struct lttng_kernel_abi_event *event_param,
-				const struct lttng_kernel_event_desc *event_desc,
-				enum lttng_kernel_abi_instrumentation itype);
-struct lttng_kernel_event_recorder *lttng_event_compat_old_create(struct lttng_channel *chan,
-		struct lttng_kernel_abi_old_event *old_event_param,
-		const struct lttng_kernel_event_desc *internal_desc);
-
-struct lttng_kernel_event_notifier *lttng_event_notifier_create(
-				const struct lttng_kernel_event_desc *event_notifier_desc,
-				uint64_t id,
-				uint64_t error_counter_idx,
-				struct lttng_event_notifier_group *event_notifier_group,
-				struct lttng_kernel_abi_event_notifier *event_notifier_param,
-				enum lttng_kernel_abi_instrumentation itype);
-struct lttng_kernel_event_notifier *_lttng_event_notifier_create(
-				const struct lttng_kernel_event_desc *event_notifier_desc,
-				uint64_t id,
-				uint64_t error_counter_idx,
-				struct lttng_event_notifier_group *event_notifier_group,
-				struct lttng_kernel_abi_event_notifier *event_notifier_param,
-				enum lttng_kernel_abi_instrumentation itype);
-
-int lttng_channel_enable(struct lttng_channel *channel);
-int lttng_channel_disable(struct lttng_channel *channel);
-int lttng_event_enable(struct lttng_kernel_event_common *event);
-int lttng_event_disable(struct lttng_kernel_event_common *event);
-
-void lttng_transport_register(struct lttng_transport *transport);
-void lttng_transport_unregister(struct lttng_transport *transport);
-
-void lttng_counter_transport_register(struct lttng_counter_transport *transport);
-void lttng_counter_transport_unregister(struct lttng_counter_transport *transport);
-
-void synchronize_trace(void);
-int lttng_abi_init(void);
-int lttng_abi_compat_old_init(void);
-void lttng_abi_exit(void);
-void lttng_abi_compat_old_exit(void);
-
-int lttng_probe_register(struct lttng_kernel_probe_desc *desc);
-void lttng_probe_unregister(struct lttng_kernel_probe_desc *desc);
-const struct lttng_kernel_event_desc *lttng_event_desc_get(const char *name);
-void lttng_event_desc_put(const struct lttng_kernel_event_desc *desc);
-int lttng_probes_init(void);
-void lttng_probes_exit(void);
-
-int lttng_metadata_output_channel(struct lttng_metadata_stream *stream,
-		struct channel *chan, bool *coherent);
-
-int lttng_id_tracker_get_node_id(const struct lttng_id_hash_node *node);
-int lttng_id_tracker_empty_set(struct lttng_id_tracker *lf);
-void lttng_id_tracker_destroy(struct lttng_id_tracker *lf, bool rcu);
-bool lttng_id_tracker_lookup(struct lttng_id_tracker_rcu *p, int id);
-int lttng_id_tracker_add(struct lttng_id_tracker *lf, int id);
-int lttng_id_tracker_del(struct lttng_id_tracker *lf, int id);
-
-int lttng_session_track_id(struct lttng_session *session,
-		enum tracker_type tracker_type, int id);
-int lttng_session_untrack_id(struct lttng_session *session,
-		enum tracker_type tracker_type, int id);
-
-int lttng_session_list_tracker_ids(struct lttng_session *session,
-		enum tracker_type tracker_type);
-
-void lttng_clock_ref(void);
-void lttng_clock_unref(void);
-
-int lttng_desc_match_enabler(const struct lttng_kernel_event_desc *desc,
-		struct lttng_enabler *enabler);
-
-#if defined(CONFIG_HAVE_SYSCALL_TRACEPOINTS)
-int lttng_syscalls_register_event(struct lttng_event_enabler *event_enabler);
-int lttng_syscalls_unregister_channel(struct lttng_channel *chan);
-int lttng_syscalls_destroy_event(struct lttng_channel *chan);
-int lttng_syscall_filter_enable_event(
-		struct lttng_channel *chan,
-		struct lttng_kernel_event_recorder *event);
-int lttng_syscall_filter_disable_event(
-		struct lttng_channel *chan,
-		struct lttng_kernel_event_recorder *event);
-
-long lttng_channel_syscall_mask(struct lttng_channel *channel,
-		struct lttng_kernel_abi_syscall_mask __user *usyscall_mask);
-
-int lttng_syscalls_register_event_notifier(
-		struct lttng_event_notifier_enabler *event_notifier_enabler);
-int lttng_syscalls_create_matching_event_notifiers(
-		struct lttng_event_notifier_enabler *event_notifier_enabler);
-int lttng_syscalls_unregister_event_notifier_group(struct lttng_event_notifier_group *group);
-int lttng_syscall_filter_enable_event_notifier(struct lttng_kernel_event_notifier *event_notifier);
-int lttng_syscall_filter_disable_event_notifier(struct lttng_kernel_event_notifier *event_notifier);
-#else
-static inline int lttng_syscalls_register_event(
-		struct lttng_event_enabler *event_enabler)
-{
-	return -ENOSYS;
-}
-
-static inline int lttng_syscalls_unregister_channel(struct lttng_channel *chan)
-{
-	return 0;
-}
-
-static inline int lttng_syscalls_destroy(struct lttng_channel *chan)
-{
-	return 0;
-}
-
-static inline int lttng_syscall_filter_enable_event(struct lttng_channel *chan,
-		struct lttng_kernel_event_recorder *event);
-{
-	return -ENOSYS;
-}
-
-static inline int lttng_syscall_filter_disable_event(struct lttng_channel *chan,
-		struct lttng_kernel_event_recorder *event);
-{
-	return -ENOSYS;
-}
-
-static inline long lttng_channel_syscall_mask(struct lttng_channel *channel,
-		struct lttng_kernel_syscall_mask __user *usyscall_mask)
-{
-	return -ENOSYS;
-}
-
-static inline int lttng_syscalls_register_event_notifier(
-		struct lttng_event_notifier_group *group)
-{
-	return -ENOSYS;
-}
-
-static inline int lttng_syscalls_unregister_event_notifier_group(
-		struct lttng_event_notifier_group *group)
-{
-	return 0;
-}
-
-static inline int lttng_syscall_filter_enable_event_notifier(
-		struct lttng_event_notifier_group *group,
-		const char *name)
-{
-	return -ENOSYS;
-}
-
-static inline int lttng_syscall_filter_disable_event_notifier(
-		struct lttng_event_notifier_group *group,
-		const char *name)
-{
-	return -ENOSYS;
-}
-
-#endif
-
-int lttng_event_enabler_attach_filter_bytecode(struct lttng_event_enabler *event_enabler,
-		struct lttng_kernel_abi_filter_bytecode __user *bytecode);
-int lttng_event_notifier_enabler_attach_filter_bytecode(
-		struct lttng_event_notifier_enabler *event_notifier_enabler,
-		struct lttng_kernel_abi_filter_bytecode __user *bytecode);
-int lttng_event_notifier_enabler_attach_capture_bytecode(
-		struct lttng_event_notifier_enabler *event_notifier_enabler,
-		struct lttng_kernel_abi_capture_bytecode __user *bytecode);
-
-void lttng_enabler_link_bytecode(const struct lttng_kernel_event_desc *event_desc,
-		struct lttng_kernel_ctx *ctx,
-		struct list_head *instance_bytecode_runtime_head,
-		struct list_head *enabler_bytecode_runtime_head);
-void lttng_free_event_filter_runtime(struct lttng_kernel_event_common *event);
-
-int lttng_probes_init(void);
-
-extern struct lttng_kernel_ctx *lttng_static_ctx;
-
-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
-
-int lttng_logger_init(void);
-void lttng_logger_exit(void);
-
-extern int lttng_statedump_start(struct lttng_session *session);
-
-#ifdef CONFIG_KPROBES
-int lttng_kprobes_register_event(const char *name,
-		const char *symbol_name,
-		uint64_t offset,
-		uint64_t addr,
-		struct lttng_kernel_event_recorder *event);
-void lttng_kprobes_unregister_event(struct lttng_kernel_event_recorder *event);
-void lttng_kprobes_destroy_event_private(struct lttng_kernel_event_recorder *event);
-int lttng_kprobes_register_event_notifier(const char *symbol_name,
-		uint64_t offset,
-		uint64_t addr,
-		struct lttng_kernel_event_notifier *event_notifier);
-void lttng_kprobes_unregister_event_notifier(struct lttng_kernel_event_notifier *event_notifier);
-void lttng_kprobes_destroy_event_notifier_private(struct lttng_kernel_event_notifier *event_notifier);
-#else
-static inline
-int lttng_kprobes_register_event(const char *name,
-		const char *symbol_name,
-		uint64_t offset,
-		uint64_t addr,
-		struct lttng_kernel_event_recorder *event)
-{
-	return -ENOSYS;
-}
-
-static inline
-void lttng_kprobes_unregister_event(struct lttng_kernel_event_recorder *event)
-{
-}
-
-static inline
-void lttng_kprobes_destroy_event_private(struct lttng_kernel_event_recorder *event)
-{
-}
-
-static inline
-int lttng_kprobes_register_event_notifier(const char *symbol_name,
-		uint64_t offset,
-		uint64_t addr,
-		struct lttng_kernel_event_notifier *event_notifier)
-{
-	return -ENOSYS;
-}
-
-static inline
-void lttng_kprobes_unregister_event_notifier(struct lttng_kernel_event_notifier *event_notifier)
-{
-}
-
-static inline
-void lttng_kprobes_destroy_event_notifier_private(struct lttng_kernel_event_notifier *event_notifier)
-{
-}
-#endif
-
-int lttng_event_add_callsite(struct lttng_kernel_event_common *event,
-	struct lttng_kernel_abi_event_callsite __user *callsite);
-
-#ifdef CONFIG_UPROBES
-int lttng_uprobes_register_event(const char *name,
-	int fd, struct lttng_kernel_event_recorder *event);
-int lttng_uprobes_event_add_callsite(struct lttng_kernel_event_common *event,
-	struct lttng_kernel_abi_event_callsite __user *callsite);
-void lttng_uprobes_unregister_event(struct lttng_kernel_event_recorder *event);
-void lttng_uprobes_destroy_event_private(struct lttng_kernel_event_recorder *event);
-int lttng_uprobes_register_event_notifier(const char *name,
-	int fd, struct lttng_kernel_event_notifier *event_notifier);
-void lttng_uprobes_unregister_event_notifier(struct lttng_kernel_event_notifier *event_notifier);
-void lttng_uprobes_destroy_event_notifier_private(struct lttng_kernel_event_notifier *event_notifier);
-#else
-static inline
-int lttng_uprobes_register_event(const char *name,
-	int fd, struct lttng_kernel_event_recorder *event)
-{
-	return -ENOSYS;
-}
-
-static inline
-int lttng_uprobes_event_add_callsite(struct lttng_kernel_event_common *event,
-	struct lttng_kernel_abi_event_callsite __user *callsite)
-{
-	return -ENOSYS;
-}
-
-static inline
-void lttng_uprobes_unregister_event(struct lttng_kernel_event_recorder *event)
-{
-}
-
-static inline
-void lttng_uprobes_destroy_event_private(struct lttng_kernel_event_recorder *event)
-{
-}
-
-static inline
-int lttng_uprobes_register_event_notifier(const char *name,
-	int fd, struct lttng_kernel_event_notifier *event_notifier)
-{
-	return -ENOSYS;
-}
-
-static inline
-void lttng_uprobes_unregister_event_notifier(struct lttng_kernel_event_notifier *event_notifier)
-{
-}
-
-static inline
-void lttng_uprobes_destroy_event_notifier_private(struct lttng_kernel_event_notifier *event_notifier)
-{
-}
-#endif
-
-#ifdef CONFIG_KRETPROBES
-int lttng_kretprobes_register(const char *name,
-		const char *symbol_name,
-		uint64_t offset,
-		uint64_t addr,
-		struct lttng_kernel_event_recorder *event_entry,
-		struct lttng_kernel_event_recorder *event_exit);
-void lttng_kretprobes_unregister(struct lttng_kernel_event_recorder *event);
-void lttng_kretprobes_destroy_private(struct lttng_kernel_event_recorder *event);
-int lttng_kretprobes_event_enable_state(struct lttng_kernel_event_common *event,
-	int enable);
-#else
-static inline
-int lttng_kretprobes_register(const char *name,
-		const char *symbol_name,
-		uint64_t offset,
-		uint64_t addr,
-		struct lttng_kernel_event_recorder *event_entry,
-		struct lttng_kernel_event_recorder *event_exit)
-{
-	return -ENOSYS;
-}
-
-static inline
-void lttng_kretprobes_unregister(struct lttng_kernel_event_recorder *event)
-{
-}
-
-static inline
-void lttng_kretprobes_destroy_private(struct lttng_kernel_event_recorder *event)
-{
-}
-
-static inline
-int lttng_kretprobes_event_enable_state(struct lttng_kernel_event_common *event,
-	int enable)
-{
-	return -ENOSYS;
-}
-#endif
-
-int lttng_calibrate(struct lttng_kernel_abi_calibrate *calibrate);
-
-extern const struct file_operations lttng_tracepoint_list_fops;
-extern const struct file_operations lttng_syscall_list_fops;
-
-#define TRACEPOINT_HAS_DATA_ARG
+bool lttng_id_tracker_lookup(struct lttng_kernel_id_tracker_rcu *p, int id);
 
 #endif /* _LTTNG_EVENTS_H */