589739056f
pr_input is currently called in softint. Some pr_input such as ICMP, ICMPv6 and CARP can add/delete/update IP addresses and routing table entries. For example, icmp6_redirect_input updates an a routing table entry and nd6_ra_input may delete an IP address. Basically such operations shouldn't be done in softint. That aside, we have a reason to avoid the situation; psz/psref waits cannot be used in softint, however they are required to work in such pr_input in the MP-safe world. The change implements the workqueue pr_input framework called wqinput which provides a means to defer pr_input of a protocol to workqueue easily. Currently icmp_input, icmp6_input, carp_proto_input and carp6_proto_input are deferred to workqueue by the framework. Proposed and discussed on tech-kern and tech-net
43 lines
1.8 KiB
C
43 lines
1.8 KiB
C
/* $NetBSD: wqinput.h,v 1.1 2017/02/02 02:52:10 ozaki-r Exp $ */
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/*-
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* Copyright (c) 2017 Internet Initiative Japan Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _NETINET_WQINPUT_H_
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#define _NETINET_WQINPUT_H_
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#if !defined(_KERNEL)
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#error "not supposed to be exposed to userland."
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#endif
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#include <sys/mbuf.h>
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struct wqinput;
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struct wqinput *wqinput_create(const char *, void(*)(struct mbuf *, int, int));
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void wqinput_input(struct wqinput *, struct mbuf *, int, int);
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#endif /* _NETINET_WQINPUT_H_ */
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