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freebsd-dev/sys/sys/dtrace_bsd.h
George V. Neville-Neil 3fac94ba94 Initial commit of an I/O provider for DTrace on FreeBSD. 
These probes are most useful when looking into the structures
they provide, which are listed in io.d.  For example:

dtrace -n 'io:genunix::start { printf("%d\n", args[0]->bio_bcount); }'

Note that the I/O systems in FreeBSD and Solaris/Illumos are sufficiently
different that there is not a 1:1 mapping from scripts that work
with one to the other.
MFC after:	1 month
2012-07-11 16:27:02 +00:00

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/*-
* Copyright (c) 2007-2008 John Birrell (jb@freebsd.org)
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*
* This file contains BSD shims for Sun's DTrace code.
*/
#ifndef _SYS_DTRACE_BSD_H
#define _SYS_DTRACE_BSD_H
/* Forward definitions: */
struct mbuf;
struct trapframe;
struct thread;
struct vattr;
struct vnode;
struct reg;
struct devstat;
struct bio;
/*
* Cyclic clock function type definition used to hook the cyclic
* subsystem into the appropriate timer interrupt.
*/
typedef void (*cyclic_clock_func_t)(struct trapframe *);
extern cyclic_clock_func_t cyclic_clock_func;
void clocksource_cyc_set(const struct bintime *t);
/*
* The dtrace module handles traps that occur during a DTrace probe.
* This type definition is used in the trap handler to provide a
* hook for the dtrace module to register it's handler with.
*/
typedef int (*dtrace_trap_func_t)(struct trapframe *, u_int);
int dtrace_trap(struct trapframe *, u_int);
extern dtrace_trap_func_t dtrace_trap_func;
/* Used by the machine dependent trap() code. */
typedef int (*dtrace_invop_func_t)(uintptr_t, uintptr_t *, uintptr_t);
typedef void (*dtrace_doubletrap_func_t)(void);
/* Global variables in trap.c */
extern dtrace_invop_func_t dtrace_invop_func;
extern dtrace_doubletrap_func_t dtrace_doubletrap_func;
/* Pid provider hooks */
typedef int (*dtrace_fasttrap_probe_ptr_t)(struct reg *);
extern dtrace_fasttrap_probe_ptr_t dtrace_fasttrap_probe_ptr;
typedef int (*dtrace_pid_probe_ptr_t)(struct reg *);
extern dtrace_pid_probe_ptr_t dtrace_pid_probe_ptr;
typedef int (*dtrace_return_probe_ptr_t)(struct reg *);
extern dtrace_return_probe_ptr_t dtrace_return_probe_ptr;
/* Virtual time hook function type. */
typedef void (*dtrace_vtime_switch_func_t)(struct thread *);
extern int dtrace_vtime_active;
extern dtrace_vtime_switch_func_t dtrace_vtime_switch_func;
/* The fasttrap module hooks into the fork, exit and exit. */
typedef void (*dtrace_fork_func_t)(struct proc *, struct proc *);
typedef void (*dtrace_execexit_func_t)(struct proc *);
/* Global variable in kern_fork.c */
extern dtrace_fork_func_t dtrace_fasttrap_fork;
/* Global variable in kern_exec.c */
extern dtrace_execexit_func_t dtrace_fasttrap_exec;
/* Global variable in kern_exit.c */
extern dtrace_execexit_func_t dtrace_fasttrap_exit;
/* The dtmalloc provider hooks into malloc. */
typedef void (*dtrace_malloc_probe_func_t)(u_int32_t, uintptr_t arg0,
uintptr_t arg1, uintptr_t arg2, uintptr_t arg3, uintptr_t arg4);
extern dtrace_malloc_probe_func_t dtrace_malloc_probe;
/* dtnfsclient NFSv[34] access cache provider hooks. */
typedef void (*dtrace_nfsclient_accesscache_flush_probe_func_t)(uint32_t,
struct vnode *);
extern dtrace_nfsclient_accesscache_flush_probe_func_t
dtrace_nfsclient_accesscache_flush_done_probe;
extern dtrace_nfsclient_accesscache_flush_probe_func_t
dtrace_nfscl_accesscache_flush_done_probe;
typedef void (*dtrace_nfsclient_accesscache_get_probe_func_t)(uint32_t,
struct vnode *, uid_t, uint32_t);
extern dtrace_nfsclient_accesscache_get_probe_func_t
dtrace_nfsclient_accesscache_get_hit_probe,
dtrace_nfsclient_accesscache_get_miss_probe;
extern dtrace_nfsclient_accesscache_get_probe_func_t
dtrace_nfscl_accesscache_get_hit_probe,
dtrace_nfscl_accesscache_get_miss_probe;
typedef void (*dtrace_nfsclient_accesscache_load_probe_func_t)(uint32_t,
struct vnode *, uid_t, uint32_t, int);
extern dtrace_nfsclient_accesscache_load_probe_func_t
dtrace_nfsclient_accesscache_load_done_probe;
extern dtrace_nfsclient_accesscache_load_probe_func_t
dtrace_nfscl_accesscache_load_done_probe;
/* dtnfsclient NFSv[234] attribute cache provider hooks. */
typedef void (*dtrace_nfsclient_attrcache_flush_probe_func_t)(uint32_t,
struct vnode *);
extern dtrace_nfsclient_attrcache_flush_probe_func_t
dtrace_nfsclient_attrcache_flush_done_probe;
extern dtrace_nfsclient_attrcache_flush_probe_func_t
dtrace_nfscl_attrcache_flush_done_probe;
typedef void (*dtrace_nfsclient_attrcache_get_hit_probe_func_t)(uint32_t,
struct vnode *, struct vattr *);
extern dtrace_nfsclient_attrcache_get_hit_probe_func_t
dtrace_nfsclient_attrcache_get_hit_probe;
extern dtrace_nfsclient_attrcache_get_hit_probe_func_t
dtrace_nfscl_attrcache_get_hit_probe;
typedef void (*dtrace_nfsclient_attrcache_get_miss_probe_func_t)(uint32_t,
struct vnode *);
extern dtrace_nfsclient_attrcache_get_miss_probe_func_t
dtrace_nfsclient_attrcache_get_miss_probe;
extern dtrace_nfsclient_attrcache_get_miss_probe_func_t
dtrace_nfscl_attrcache_get_miss_probe;
typedef void (*dtrace_nfsclient_attrcache_load_probe_func_t)(uint32_t,
struct vnode *, struct vattr *, int);
extern dtrace_nfsclient_attrcache_load_probe_func_t
dtrace_nfsclient_attrcache_load_done_probe;
extern dtrace_nfsclient_attrcache_load_probe_func_t
dtrace_nfscl_attrcache_load_done_probe;
/* dtnfsclient NFSv[234] RPC provider hooks. */
typedef void (*dtrace_nfsclient_nfs23_start_probe_func_t)(uint32_t,
struct vnode *, struct mbuf *, struct ucred *, int);
extern dtrace_nfsclient_nfs23_start_probe_func_t
dtrace_nfsclient_nfs23_start_probe;
extern dtrace_nfsclient_nfs23_start_probe_func_t
dtrace_nfscl_nfs234_start_probe;
typedef void (*dtrace_nfsclient_nfs23_done_probe_func_t)(uint32_t,
struct vnode *, struct mbuf *, struct ucred *, int, int);
extern dtrace_nfsclient_nfs23_done_probe_func_t
dtrace_nfsclient_nfs23_done_probe;
extern dtrace_nfsclient_nfs23_done_probe_func_t
dtrace_nfscl_nfs234_done_probe;
/* IO Provider hooks, really hook into devstat */
typedef void (*dtrace_io_start_probe_func_t)(uint32_t, struct bio *,
struct devstat *);
extern dtrace_io_start_probe_func_t dtrace_io_start_probe;
typedef void (*dtrace_io_done_probe_func_t)(uint32_t, struct bio *,
struct devstat *);
extern dtrace_io_done_probe_func_t dtrace_io_done_probe;
typedef void (*dtrace_io_wait_start_probe_func_t)(uint32_t, uintptr_t *,
struct devstat *);
extern dtrace_io_wait_start_probe_func_t dtrace_io_wait_start_probe;
typedef void (*dtrace_io_wait_done_probe_func_t)(uint32_t, uintptr_t *,
struct devstat *);
extern dtrace_io_wait_done_probe_func_t dtrace_io_wait_done_probe;
/*
* Functions which allow the dtrace module to check that the kernel
* hooks have been compiled with sufficient space for it's private
* structures.
*/
size_t kdtrace_proc_size(void);
size_t kdtrace_thread_size(void);
/*
* OpenSolaris compatible time functions returning nanoseconds.
* On OpenSolaris these return hrtime_t which we define as uint64_t.
*/
uint64_t dtrace_gethrtime(void);
uint64_t dtrace_gethrestime(void);
#endif /* _SYS_DTRACE_BSD_H */
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