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Currently it has several disadvantages: - it uses single mutex to protect internal structures. It is used by data- and control- path, thus there are no parallelism at all. - it uses single list to keep encap handlers for both INET and INET6 families. - struct encaptab keeps unneeded information (src, dst, masks, protosw), that isn't used by code in the source tree. - matches are prioritized and when many tunneling interfaces are registered, encapcheck handler of each interface is invoked for each packet. The search takes O(n) for n interfaces. All this work is done with exclusive lock held. What this patch includes: - the datapath is converted to be lockless using epoch(9) KPI. - struct encaptab now linked using CK_LIST. - all unused fields removed from struct encaptab. Several new fields addedr: min_length is the minimum packet length, that encapsulation handler expects to see; exact_match is maximum number of bits, that can return an encapsulation handler, when it wants to consume a packet. - IPv6 and IPv4 handlers are stored in separate lists; - added new "encap_lookup_t" method, that will be used later. It is targeted to speedup lookup of needed interface, when gif(4)/gre(4) have many interfaces. - the need to use protosw structure is eliminated. The only pr_input method was used from this structure, so I don't see the need to keep using it. - encap_input_t method changed to avoid using mbuf tags to store softc pointer. Now it is passed directly trough encap_input_t method. encap_getarg() funtions is removed. - all sockaddr structures and code that uses them removed. We don't have any code in the tree that uses them. All consumers use encap_attach_func() method, that relies on invoking of encapcheck() to determine the needed handler. - introduced struct encap_config, it contains parameters of encap handler that is going to be registered by encap_attach() function. - encap handlers are stored in lists ordered by exact_match value, thus handlers that need more bits to match will be checked first, and if encapcheck method returns exact_match value, the search will be stopped. - all current consumers changed to use new KPI. Reviewed by: mmacy Sponsored by: Yandex LLC Differential Revision: https://reviews.freebsd.org/D15617
80 lines
3.1 KiB
C
80 lines
3.1 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1998-2000
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* University of Southern California/Information Sciences Institute.
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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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* 3. Neither the name of the project nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _NETINET_PIM_VAR_H_
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#define _NETINET_PIM_VAR_H_
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/*
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* Protocol Independent Multicast (PIM),
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* kernel variables and implementation-specific definitions.
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*
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* Written by George Edmond Eddy (Rusty), ISI, February 1998.
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* Modified by Pavlin Radoslavov, USC/ISI, May 1998, Aug 1999, October 2000.
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* Modified by Hitoshi Asaeda, WIDE, August 1998.
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*/
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/*
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* PIM statistics kept in the kernel
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*/
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struct pimstat {
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uint64_t pims_rcv_total_msgs; /* total PIM messages received */
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uint64_t pims_rcv_total_bytes; /* total PIM bytes received */
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uint64_t pims_rcv_tooshort; /* rcvd with too few bytes */
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uint64_t pims_rcv_badsum; /* rcvd with bad checksum */
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uint64_t pims_rcv_badversion; /* rcvd bad PIM version */
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uint64_t pims_rcv_registers_msgs; /* rcvd regs. msgs (data only) */
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uint64_t pims_rcv_registers_bytes; /* rcvd regs. bytes (data only) */
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uint64_t pims_rcv_registers_wrongiif; /* rcvd regs. on wrong iif */
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uint64_t pims_rcv_badregisters; /* rcvd invalid registers */
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uint64_t pims_snd_registers_msgs; /* sent regs. msgs (data only) */
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uint64_t pims_snd_registers_bytes; /* sent regs. bytes (data only) */
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};
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#ifdef _KERNEL
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#define PIMSTAT_ADD(name, val) \
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VNET_PCPUSTAT_ADD(struct pimstat, pimstat, name, (val))
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#define PIMSTAT_INC(name) PIMSTAT_ADD(name, 1)
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#endif
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/*
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* Identifiers for PIM sysctl nodes
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*/
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#define PIMCTL_STATS 1 /* statistics (read-only) */
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#ifdef _KERNEL
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SYSCTL_DECL(_net_inet_pim);
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#endif
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#endif /* _NETINET_PIM_VAR_H_ */
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