+#ifndef _LTT_EVENTS_H
+#define _LTT_EVENTS_H
+
/*
* ltt-events.h
*
*/
#include <linux/list.h>
+#include "ltt-debugfs-abi.h"
struct ltt_channel;
struct ltt_session;
-
-enum instrum_type itype {
- INSTRUM_TRACEPOINTS,
-};
+struct lib_ring_buffer_ctx;
/*
* ltt_event structure is referred to by the tracing fast path. It must be
struct list_head list; /* Event list */
};
+struct ltt_channel_ops {
+ struct channel *(*channel_create)(const char *name,
+ struct ltt_session *session,
+ 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);
+ void (*buffer_read_close)(struct lib_ring_buffer *buf);
+ int (*event_reserve)(struct lib_ring_buffer_ctx *ctx);
+ void (*event_commit)(struct lib_ring_buffer_ctx *ctx);
+ void (*event_write)(struct lib_ring_buffer_ctx *ctx, const void *src,
+ size_t len);
+};
+
struct ltt_channel {
struct channel *chan; /* Channel buffers */
/* Event ID management */
struct ltt_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 */
- char name[PATH_MAX];
+ wait_queue_head_t notify_wait; /* Channel addition notif. waitqueue */
+ struct ltt_channel_ops *ops;
};
struct ltt_session {
int active; /* Is trace session 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 */
- char name[PATH_MAX];
+};
+
+struct ltt_transport {
+ char *name;
+ struct module *owner;
+ struct list_head node;
+ struct ltt_channel_ops ops;
+};
+
+/* Type description */
+
+/* Update the astract_types name table in lttng-types.c along with this enum */
+enum abstract_types {
+ atype_integer,
+ atype_enum,
+ atype_array,
+ atype_sequence,
+ atype_string,
+ NR_ABSTRACT_TYPES,
+};
+
+/* Update the string_encodings name table in lttng-types.c along with this enum */
+enum lttng_string_encodings {
+ lttng_encode_UTF8 = 0,
+ lttng_encode_ASCII = 1,
+ NR_STRING_ENCODINGS,
+};
+
+struct lttng_enum_entry {
+ unsigned long long start, end; /* start and end are inclusive */
+ const char *string;
+};
+
+struct lttng_enum {
+ const struct lttng_enum_entry *entries;
+ unsigned int len;
+};
+
+struct lttng_type {
+ enum abstract_types atype;
+ const char *name;
+ union {
+ struct {
+ unsigned int size; /* in bits */
+ unsigned short alignment; /* in bits */
+ unsigned int signedness:1;
+ unsigned int reverse_byte_order:1;
+ } integer;
+ struct {
+ const char *parent_type;
+ const struct lttng_enum def;
+ } enumeration;
+ struct {
+ const char *elem_type;
+ unsigned int length; /* num. elems. */
+ } array;
+ struct {
+ const char *elem_type;
+ const char *length_type;
+ } sequence;
+ struct {
+ enum lttng_string_encodings encoding;
+ } string;
+ } u;
+} __attribute__((packed));
+
+/* Event field description */
+
+struct lttng_event_field {
+ const char *name;
+ const struct lttng_type type;
+};
+
+struct lttng_event_desc {
+ const struct lttng_event_field *fields;
+ const char *name;
+ void *probe_callback;
+ unsigned int nr_fields;
};
struct ltt_session *ltt_session_create(void);
-int ltt_session_destroy(struct ltt_session *session);
+int ltt_session_start(struct ltt_session *session);
+int ltt_session_stop(struct ltt_session *session);
+void ltt_session_destroy(struct ltt_session *session);
struct ltt_channel *ltt_channel_create(struct ltt_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);
+struct ltt_channel *ltt_global_channel_create(struct ltt_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);
-int _ltt_channel_destroy(struct ltt_channel *chan);
+void _ltt_channel_destroy(struct ltt_channel *chan);
+
+struct ltt_event *ltt_event_create(struct ltt_channel *chan,
+ char *name,
+ enum instrum_type itype,
+ void *probe, void *filter);
+int _ltt_event_unregister(struct ltt_event *event);
+void _ltt_event_destroy(struct ltt_event *event);
+
+void ltt_transport_register(struct ltt_transport *transport);
+void ltt_transport_unregister(struct ltt_transport *transport);
+
+int ltt_debugfs_abi_init(void);
+void ltt_debugfs_abi_exit(void);
+
+int ltt_probe_register(const char *name, void *cb);
+void ltt_probe_unregister(const char *name);
+void *ltt_probe_get(const char *name);
+void ltt_probe_put(void *cb);
+int ltt_probes_init(void);
+void ltt_probes_exit(void);
-struct ltt_event *ltt_event_create(struct ltt_channel *chan, char *name,
- void *filter);
-int _ltt_event_destroy(struct ltt_event *event);
+#endif /* _LTT_EVENTS_H */
projects / lttng-modules.git / blobdiff