+#ifndef _LTT_TRACER_H
+#define _LTT_TRACER_H
+
/*
- * Copyright (C) 2005,2006,2008 Mathieu Desnoyers (mathieu.desnoyers@polymtl.ca)
+ * ltt-tracer.h
+ *
+ * Copyright (C) 2005-2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
*
* This contains the definitions for the Linux Trace Toolkit tracer.
*
* Dual LGPL v2.1/GPL v2 license.
*/
-#ifndef _LTT_TRACER_H
-#define _LTT_TRACER_H
-
#include <stdarg.h>
#include <linux/types.h>
#include <linux/limits.h>
#include "ltt-tracer-core.h"
#include "ltt-events.h"
+#define LTTNG_VERSION 0
+#define LTTNG_PATCHLEVEL 9
+#define LTTNG_SUBLEVEL 1
+
#ifndef CHAR_BIT
#define CHAR_BIT 8
#endif
/* Number of bytes to log with a read/write event */
#define LTT_LOG_RW_SIZE 32L
-
-/* Maximum number of callbacks per marker */
-#define LTT_NR_CALLBACKS 10
-
-struct ltt_serialize_closure;
-
-/* Serialization callback */
-typedef size_t (*ltt_serialize_cb)(struct lib_ring_buffer *buf,
- size_t buf_offset,
- struct ltt_serialize_closure *closure,
- void *serialize_private,
- unsigned int stack_pos_ctx,
- int *largest_align,
- const char *fmt, va_list *args);
-
-struct ltt_serialize_closure {
- ltt_serialize_cb *callbacks;
- long cb_args[LTT_NR_CALLBACKS];
- unsigned int cb_idx;
-};
-
-size_t ltt_serialize_data(struct lib_ring_buffer *buf, size_t buf_offset,
- struct ltt_serialize_closure *closure,
- void *serialize_private, unsigned int stack_pos_ctx,
- int *largest_align, const char *fmt, va_list *args);
-
-enum ltt_channels {
- LTT_CHANNEL_METADATA,
- LTT_CHANNEL_FD_STATE,
- LTT_CHANNEL_GLOBAL_STATE,
- LTT_CHANNEL_IRQ_STATE,
- LTT_CHANNEL_MODULE_STATE,
- LTT_CHANNEL_NETIF_STATE,
- LTT_CHANNEL_SOFTIRQ_STATE,
- LTT_CHANNEL_SWAP_STATE,
- LTT_CHANNEL_SYSCALL_STATE,
- LTT_CHANNEL_TASK_STATE,
- LTT_CHANNEL_VM_STATE,
- LTT_CHANNEL_FS,
- LTT_CHANNEL_INPUT,
- LTT_CHANNEL_IPC,
- LTT_CHANNEL_KERNEL,
- LTT_CHANNEL_MM,
- LTT_CHANNEL_RCU,
- LTT_CHANNEL_DEFAULT,
-};
-
-/*
- * Hardcoded event headers
- *
- * event header for a trace with active heartbeat : 27 bits timestamps
- *
- * headers are 32-bits aligned. In order to insure such alignment, a dynamic per
- * trace alignment value must be done.
- *
- * Remember that the C compiler does align each member on the boundary
- * equivalent to their own size.
- *
- * As relay subbuffers are aligned on pages, we are sure that they are 4 and 8
- * bytes aligned, so the buffer header and trace header are aligned.
- *
- * Event headers are aligned depending on the trace alignment option.
- *
- * Note using C structure bitfields for cross-endianness and portability
- * concerns.
- */
-
-#define LTT_RESERVED_EVENTS 3
-#define LTT_EVENT_BITS 5
-#define LTT_FREE_EVENTS ((1 << LTT_EVENT_BITS) - LTT_RESERVED_EVENTS)
-#define LTT_TSC_BITS 27
-#define LTT_TSC_MASK ((1 << LTT_TSC_BITS) - 1)
-
-struct event_header {
- u32 id_time; /* 5 bits event id (MSB); 27 bits time (LSB) */
-};
-
-/* Reservation flags */
-#define LTT_RFLAG_ID (1 << 0)
-#define LTT_RFLAG_ID_SIZE (1 << 1)
-#define LTT_RFLAG_ID_SIZE_TSC (1 << 2)
-
#define LTT_MAX_SMALL_SIZE 0xFFFFU
#ifdef RING_BUFFER_ALIGN
-static inline
-size_t ltt_get_header_alignment(void)
-{
- return sizeof(struct event_header) * CHAR_BIT;
-}
-
#define ltt_alignof(type) __alignof__(type)
#else
-static inline
-size_t ltt_get_header_alignment(void)
-{
- return CHAR_BIT;
-}
-
#define ltt_alignof(type) 1
#endif
/* Tracer properties */
#define CTF_MAGIC_NUMBER 0xC1FC1FC1
#define TSDL_MAGIC_NUMBER 0x75D11D57
+
+/* CTF specification version followed */
+#define CTF_SPEC_MAJOR 1
+#define CTF_SPEC_MINOR 8
+
+/* Tracer major/minor versions */
#define CTF_VERSION_MAJOR 0
#define CTF_VERSION_MINOR 1
*/
#define LTTNG_METADATA_TIMEOUT_MSEC 10000
-/*
- * Size reserved for high priority events (interrupts, NMI, BH) at the end of a
- * nearly full buffer. User space won't use this last amount of space when in
- * blocking mode. This space also includes the event header that would be
- * written by this user space event.
- */
-#define LTT_RESERVE_CRITICAL 4096
-
-/* Register and unregister function pointers */
-
-enum ltt_module_function {
- LTT_FUNCTION_RUN_FILTER,
- LTT_FUNCTION_FILTER_CONTROL,
- LTT_FUNCTION_STATEDUMP
-};
-
-extern int ltt_module_register(enum ltt_module_function name, void *function,
- struct module *owner);
-extern void ltt_module_unregister(enum ltt_module_function name);
-
-/* Exported control function */
-
-void ltt_core_register(int (*function)(u8, void *));
-
-void ltt_core_unregister(void);
-
-extern
-void ltt_statedump_register_kprobes_dump(void (*callback)(void *call_data));
-extern
-void ltt_statedump_unregister_kprobes_dump(void (*callback)(void *call_data));
-
-extern void ltt_dump_softirq_vec(void *call_data);
-
-#ifdef CONFIG_HAVE_LTT_DUMP_TABLES
-extern void ltt_dump_sys_call_table(void *call_data);
-extern void ltt_dump_idt_table(void *call_data);
-#else
-static inline void ltt_dump_sys_call_table(void *call_data)
-{
-}
-
-static inline void ltt_dump_idt_table(void *call_data)
-{
-}
-#endif
+#define LTT_RFLAG_EXTENDED RING_BUFFER_RFLAG_END
+#define LTT_RFLAG_END (LTT_RFLAG_EXTENDED << 1)
#endif /* _LTT_TRACER_H */
projects / lttng-modules.git / blobdiff