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FreeBSD: add knlist_init_sx() for exclusive locks 

This will be used to implement kqfilter support for zvol cdevs.

Reviewed-by: Ryan Moeller <ryan@iXsystems.com>
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Signed-off-by: Rob Wing <rew@FreeBSD.org>
Closes #13773
This commit is contained in:
Rob Wing 2022-08-13 21:09:49 -08:00 committed by Brian Behlendorf
parent 11df48ab8b
commit 9d0887402b
3 changed files with 103 additions and 0 deletions
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37
include/os/freebsd/zfs/sys/freebsd_event.h Normal file
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@ -0,0 +1,37 @@
/*
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2022 Rob Wing
*
* 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 REGENTS 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 REGENTS 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.
*/
#ifndef _ZFS_FREEBSD_EVENT_H
#define _ZFS_FREEBSD_EVENT_H
#ifdef _KERNEL
void knlist_init_sx(struct knlist *knl, struct sx *lock);
#endif /* !_KERNEL */
#endif /* !_ZFS_FREEBSD_EVENT_H */

1
module/Makefile.bsd
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@ -172,6 +172,7 @@ SRCS+= abd_os.c \
arc_os.c \
crypto_os.c \
dmu_os.c \
event_os.c \
hkdf.c \
kmod_core.c \
spa_os.c \

65
module/os/freebsd/zfs/event_os.c Normal file
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@ -0,0 +1,65 @@
/*
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2022 Rob Wing
*
* 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 REGENTS 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 REGENTS 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/param.h>
#include <sys/lock.h>
#include <sys/sx.h>
#include <sys/event.h>
#include <sys/freebsd_event.h>
static void
knlist_sx_xlock(void *arg)
{
sx_xlock((struct sx *)arg);
}
static void
knlist_sx_xunlock(void *arg)
{
sx_xunlock((struct sx *)arg);
}
static void
knlist_sx_assert_lock(void *arg, int what)
{
if (what == LA_LOCKED)
sx_assert((struct sx *)arg, SX_LOCKED);
else
sx_assert((struct sx *)arg, SX_UNLOCKED);
}
void
knlist_init_sx(struct knlist *knl, struct sx *lock)
{
knlist_init(knl, lock, knlist_sx_xlock, knlist_sx_xunlock,
knlist_sx_assert_lock);
}