+#ifndef _LTT_EVENTS_H
+#define _LTT_EVENTS_H
+
/*
* ltt-events.h
*
*/
#include <linux/list.h>
+#include <linux/uuid.h>
+#include <linux/kprobes.h>
+#include "ltt-debugfs-abi.h"
+
+#undef is_signed_type
+#define is_signed_type(type) (((type)(-1)) < 0)
struct ltt_channel;
struct ltt_session;
+struct lib_ring_buffer_ctx;
+struct perf_event;
+struct perf_event_attr;
+
+/* 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_none = 0,
+ lttng_encode_UTF8 = 1,
+ lttng_encode_ASCII = 2,
+ NR_STRING_ENCODINGS,
+};
+
+struct lttng_enum_entry {
+ unsigned long long start, end; /* start and end are inclusive */
+ const char *string;
+};
+
+#define __type_integer(_type, _byte_order, _base, _encoding) \
+ { \
+ .atype = atype_integer, \
+ .u.basic.integer = \
+ { \
+ .size = sizeof(_type) * CHAR_BIT, \
+ .alignment = ltt_alignof(_type) * CHAR_BIT, \
+ .signedness = is_signed_type(_type), \
+ .reverse_byte_order = _byte_order != __BYTE_ORDER, \
+ .base = _base, \
+ .encoding = lttng_encode_##_encoding, \
+ }, \
+ } \
+
+struct lttng_integer_type {
+ unsigned int size; /* in bits */
+ unsigned short alignment; /* in bits */
+ unsigned int signedness:1;
+ unsigned int reverse_byte_order:1;
+ unsigned int base; /* 2, 8, 10, 16, for pretty print */
+ enum lttng_string_encodings encoding;
+};
+
+union _lttng_basic_type {
+ struct lttng_integer_type integer;
+ struct {
+ const char *name;
+ } enumeration;
+ struct {
+ enum lttng_string_encodings encoding;
+ } string;
+};
+
+struct lttng_basic_type {
+ enum abstract_types atype;
+ union {
+ union _lttng_basic_type basic;
+ } u;
+};
+
+struct lttng_type {
+ enum abstract_types atype;
+ union {
+ union _lttng_basic_type basic;
+ struct {
+ struct lttng_basic_type elem_type;
+ unsigned int length; /* num. elems. */
+ } array;
+ struct {
+ struct lttng_basic_type length_type;
+ struct lttng_basic_type elem_type;
+ } sequence;
+ } u;
+};
+
+struct lttng_enum {
+ const char *name;
+ struct lttng_type container_type;
+ const struct lttng_enum_entry *entries;
+ unsigned int len;
+};
+
+/* Event field description */
+
+struct lttng_event_field {
+ const char *name;
+ struct lttng_type type;
+};
+
+struct lttng_ctx_field {
+ struct lttng_event_field event_field;
+ size_t (*get_size)(size_t offset);
+ void (*record)(struct lttng_ctx_field *field,
+ struct lib_ring_buffer_ctx *ctx,
+ struct ltt_channel *chan);
+ union {
+ struct {
+ struct perf_event **e; /* per-cpu array */
+ struct list_head head;
+ struct perf_event_attr *attr;
+ } perf_counter;
+ } u;
+ void (*destroy)(struct lttng_ctx_field *field);
+};
+
+struct lttng_ctx {
+ struct lttng_ctx_field *fields;
+ unsigned int nr_fields;
+ unsigned int allocated_fields;
+};
+
+struct lttng_event_desc {
+ const char *name;
+ void *probe_callback;
+ const struct lttng_event_ctx *ctx; /* context */
+ const struct lttng_event_field *fields; /* event payload */
+ unsigned int nr_fields;
+ struct module *owner;
+};
-enum instrum_type itype {
- INSTRUM_TRACEPOINTS,
+struct lttng_probe_desc {
+ const struct lttng_event_desc *event_desc;
+ unsigned int nr_events;
+ struct list_head head; /* chain registered probes */
};
/*
struct ltt_event {
unsigned int id;
struct ltt_channel *chan;
- void *probe;
+ const struct lttng_event_desc *desc;
void *filter;
- char *name;
- enum instrum_type itype;
+ struct lttng_ctx *ctx;
+ enum lttng_kernel_instrumentation instrumentation;
+ union {
+ struct {
+ struct kprobe kp;
+ char *symbol_name;
+ } kprobe;
+ struct {
+ char *symbol_name;
+ } ftrace;
+ } u;
struct list_head list; /* Event list */
+ int metadata_dumped:1;
+};
+
+struct ltt_channel_ops {
+ struct channel *(*channel_create)(const char *name,
+ struct ltt_channel *ltt_chan,
+ 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,
+ 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,
+ 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_reader_wait_queue)(struct ltt_channel *chan);
};
struct ltt_channel {
+ unsigned int id;
struct channel *chan; /* Channel buffers */
+ struct lttng_ctx *ctx;
/* 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;
+ int header_type; /* 0: unset, 1: compact, 2: large */
+ int metadata_dumped:1;
};
struct ltt_session {
int active; /* Is trace session active ? */
+ int been_active; /* Has trace session been active ? */
+ struct file *file; /* File associated to session */
+ struct ltt_channel *metadata; /* Metadata channel */
struct list_head chan; /* Channel list head */
struct list_head events; /* Event list head */
struct list_head list; /* Session list */
- char name[PATH_MAX];
+ unsigned int free_chan_id; /* Next chan ID to allocate */
+ uuid_le uuid; /* Trace session unique ID */
+ int metadata_dumped:1;
+};
+
+struct ltt_transport {
+ char *name;
+ struct module *owner;
+ struct list_head node;
+ struct ltt_channel_ops ops;
};
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);
-struct ltt_event *ltt_event_create(struct ltt_channel *chan, char *name,
+struct ltt_event *ltt_event_create(struct ltt_channel *chan,
+ struct lttng_kernel_event *event_param,
void *filter);
-int _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(struct lttng_probe_desc *desc);
+void ltt_probe_unregister(struct lttng_probe_desc *desc);
+const struct lttng_event_desc *ltt_event_get(const char *name);
+void ltt_event_put(const struct lttng_event_desc *desc);
+int ltt_probes_init(void);
+void ltt_probes_exit(void);
+struct lttng_ctx_field *lttng_append_context(struct lttng_ctx **ctx);
+void lttng_destroy_context(struct lttng_ctx *ctx);
+
+int wrapper_task_prio_init(void);
+int wrapper_task_prio_sym(struct task_struct *t);
+
+int lttng_add_pid_to_ctx(struct lttng_ctx **ctx);
+int lttng_add_comm_to_ctx(struct lttng_ctx **ctx);
+int lttng_add_prio_to_ctx(struct lttng_ctx **ctx);
+int lttng_add_nice_to_ctx(struct lttng_ctx **ctx);
+
+#ifdef CONFIG_KPROBES
+int lttng_kprobes_register(const char *name,
+ const char *symbol_name,
+ uint64_t offset,
+ uint64_t addr,
+ struct ltt_event *event);
+void lttng_kprobes_unregister(struct ltt_event *event);
+void lttng_kprobes_destroy_private(struct ltt_event *event);
+#else
+static inline
+int lttng_kprobes_register(const char *name,
+ const char *symbol_name,
+ uint64_t offset,
+ uint64_t addr,
+ struct ltt_event *event)
+{
+ return -ENOSYS;
+}
+
+static inline
+void lttng_kprobes_unregister(struct ltt_event *event)
+{
+}
+
+static inline
+void lttng_kprobes_destroy_private(struct ltt_event *event)
+{
+}
+#endif
+
+#ifdef CONFIG_DYNAMIC_FTRACE
+int lttng_ftrace_register(const char *name,
+ const char *symbol_name,
+ struct ltt_event *event);
+void lttng_ftrace_unregister(struct ltt_event *event);
+void lttng_ftrace_destroy_private(struct ltt_event *event);
+#else
+static inline
+int lttng_ftrace_register(const char *name,
+ const char *symbol_name,
+ struct ltt_event *event)
+{
+ return -ENOSYS;
+}
+
+static inline
+void lttng_ftrace_unregister(struct ltt_event *event)
+{
+}
+
+static inline
+void lttng_ftrace_destroy_private(struct ltt_event *event)
+{
+}
+#endif
+
+extern const struct file_operations lttng_tracepoint_list_fops;
+
+#endif /* _LTT_EVENTS_H */
projects / lttng-modules.git / blobdiff