97 lines
2.4 KiB
C
97 lines
2.4 KiB
C
/*-
|
|
* Copyright (c) 2012 Gleb Smirnoff <glebius@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.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/lock.h>
|
|
#include <sys/mutex.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/sched.h>
|
|
#include <sys/smp.h>
|
|
#include <sys/sysctl.h>
|
|
#include <vm/uma.h>
|
|
|
|
#define IN_SUBR_COUNTER_C
|
|
#include <sys/counter.h>
|
|
|
|
void
|
|
counter_u64_zero(counter_u64_t c)
|
|
{
|
|
|
|
counter_u64_zero_inline(c);
|
|
}
|
|
|
|
uint64_t
|
|
counter_u64_fetch(counter_u64_t c)
|
|
{
|
|
|
|
return (counter_u64_fetch_inline(c));
|
|
}
|
|
|
|
counter_u64_t
|
|
counter_u64_alloc(int flags)
|
|
{
|
|
counter_u64_t r;
|
|
|
|
r = uma_zalloc(pcpu_zone_64, flags);
|
|
if (r != NULL)
|
|
counter_u64_zero(r);
|
|
|
|
return (r);
|
|
}
|
|
|
|
void
|
|
counter_u64_free(counter_u64_t c)
|
|
{
|
|
|
|
uma_zfree(pcpu_zone_64, c);
|
|
}
|
|
|
|
int
|
|
sysctl_handle_counter_u64(SYSCTL_HANDLER_ARGS)
|
|
{
|
|
uint64_t out;
|
|
int error;
|
|
|
|
out = counter_u64_fetch(*(counter_u64_t *)arg1);
|
|
|
|
error = SYSCTL_OUT(req, &out, sizeof(uint64_t));
|
|
|
|
if (error || !req->newptr)
|
|
return (error);
|
|
|
|
/*
|
|
* Any write attempt to a counter zeroes it.
|
|
*/
|
|
counter_u64_zero(*(counter_u64_t *)arg1);
|
|
|
|
return (0);
|
|
}
|