b941bc1d6e
of needed interface when many gif interfaces are present. Remove rmlock from gif_softc, use epoch(9) and CK_LIST instead. Move more AF-related code into AF-related locations. Use hash table to speedup lookup of needed softc. Interfaces with GIF_IGNORE_SOURCE flag are stored in plain CK_LIST. Sysctl net.link.gif.parallel_tunnels is removed. The removal was planed 16 years ago, and actually it could work only for outbound direction. Each protocol, that can be handled by if_gif(4) interface is registered by separate encap handler, this helps avoid invoking the handler for unrelated protocols (GRE, PIM, etc.). This change allows dramatically improve performance when many gif(4) interfaces are used. Sponsored by: Yandex LLC
131 lines
4.2 KiB
C
131 lines
4.2 KiB
C
/* $FreeBSD$ */
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/* $KAME: if_gif.h,v 1.17 2000/09/11 11:36:41 sumikawa Exp $ */
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/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
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* Copyright (c) 2018 Andrey V. Elsukov <ae@FreeBSD.org>
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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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#ifndef _NET_IF_GIF_H_
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#define _NET_IF_GIF_H_
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#ifdef _KERNEL
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struct ip;
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struct ip6_hdr;
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extern void (*ng_gif_input_p)(struct ifnet *ifp, struct mbuf **mp,
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int af);
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extern void (*ng_gif_input_orphan_p)(struct ifnet *ifp, struct mbuf *m,
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int af);
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extern int (*ng_gif_output_p)(struct ifnet *ifp, struct mbuf **mp);
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extern void (*ng_gif_attach_p)(struct ifnet *ifp);
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extern void (*ng_gif_detach_p)(struct ifnet *ifp);
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struct gif_softc {
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struct ifnet *gif_ifp;
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int gif_family;
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int gif_flags;
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u_int gif_fibnum;
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u_int gif_options;
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void *gif_netgraph; /* netgraph node info */
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union {
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void *hdr;
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struct ip *iphdr;
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struct ip6_hdr *ip6hdr;
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} gif_uhdr;
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CK_LIST_ENTRY(gif_softc) chain;
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};
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CK_LIST_HEAD(gif_list, gif_softc);
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MALLOC_DECLARE(M_GIF);
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#ifndef GIF_HASH_SIZE
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#define GIF_HASH_SIZE (1 << 4)
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#endif
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#define GIF2IFP(sc) ((sc)->gif_ifp)
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#define gif_iphdr gif_uhdr.iphdr
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#define gif_hdr gif_uhdr.hdr
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#define gif_ip6hdr gif_uhdr.ip6hdr
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#define GIF_MTU (1280) /* Default MTU */
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#define GIF_MTU_MIN (1280) /* Minimum MTU */
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#define GIF_MTU_MAX (8192) /* Maximum MTU */
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struct etherip_header {
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#if BYTE_ORDER == LITTLE_ENDIAN
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u_int eip_resvl:4, /* reserved */
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eip_ver:4; /* version */
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#endif
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#if BYTE_ORDER == BIG_ENDIAN
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u_int eip_ver:4, /* version */
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eip_resvl:4; /* reserved */
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#endif
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u_int8_t eip_resvh; /* reserved */
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} __packed;
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#define ETHERIP_VERSION 0x3
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/* mbuf adjust factor to force 32-bit alignment of IP header */
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#define ETHERIP_ALIGN 2
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#define GIF_RLOCK() epoch_enter_preempt(net_epoch_preempt)
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#define GIF_RUNLOCK() epoch_exit_preempt(net_epoch_preempt)
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#define GIF_WAIT() epoch_wait_preempt(net_epoch_preempt)
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/* Prototypes */
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struct gif_list *gif_hashinit(void);
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void gif_hashdestroy(struct gif_list *);
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void gif_input(struct mbuf *, struct ifnet *, int, uint8_t);
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int gif_output(struct ifnet *, struct mbuf *, const struct sockaddr *,
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struct route *);
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void in_gif_init(void);
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void in_gif_uninit(void);
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int in_gif_output(struct ifnet *, struct mbuf *, int, uint8_t);
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int in_gif_ioctl(struct gif_softc *, u_long, caddr_t);
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int in_gif_setopts(struct gif_softc *, u_int);
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void in6_gif_init(void);
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void in6_gif_uninit(void);
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int in6_gif_output(struct ifnet *, struct mbuf *, int, uint8_t);
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int in6_gif_ioctl(struct gif_softc *, u_long, caddr_t);
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int in6_gif_setopts(struct gif_softc *, u_int);
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#endif /* _KERNEL */
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#define GIFGOPTS _IOWR('i', 150, struct ifreq)
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#define GIFSOPTS _IOW('i', 151, struct ifreq)
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#define GIF_IGNORE_SOURCE 0x0002
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#define GIF_OPTMASK (GIF_IGNORE_SOURCE)
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#endif /* _NET_IF_GIF_H_ */
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