mirror of
https://github.com/freebsd/freebsd-src.git
synced 2026-10-28 11:25:21 +01:00
Gleb Smirnoff
0d469d2371
This change retires two historic relics: the if_afdata[] array and the dom_ifattach/dom_ifdetach methods. The if_afdata[] array is a relic of the era, when there was expectation that many transport protocols will coexist with IP, e.g. IPX or NetAtalk. The array hasn't had any members except AF_INET and AF_INET6 for over a decade already. This change removes the array and just leaves two pointer fields: if_inet and if_inet6. The dom_ifattach/dom_ifdetach predates the EVENTHANDLER(9) framework and was a good enough method to initialize protocol contexts back then. Today there is no good reason to treat IPv4 and IPv6 stacks differently to other protocols/features that attach and detach from an interface. The locking of if_afdata[] is a relic of SMPng times, when the system startup and the interface attach was even more convoluted than before this change, and we also had unloadable protocols that used a field in if_afdata[]. Note that IPv4 and IPv6 are not unloadable. Note that this change removes NET_EPOCH_WAIT() from the interface detach sequence. This may surface several new races associated with interface removal. I failed to hit any with consecutive test suite runs, though. The expected general race scenario is that while struct ifnet is freed with proper epoch_call(9) itself, some structures hanging off ifnet are freed with direct free(9). The proper fix is either make if_foo point at some static "dead" structure providing SMP visibility of this store, or free those structure with epoch_call(9). All of these cases are planned to be found and resolved during 16.0-CURRENT lifetime. Reviewed by: zlei, gallatin, melifaro Differential Revision: https://reviews.freebsd.org/D54089
135 lines
4.6 KiB
C
135 lines
4.6 KiB
C
/*-
|
|
* SPDX-License-Identifier: BSD-3-Clause
|
|
*
|
|
* Copyright (c) 1982, 1986, 1993
|
|
* The Regents of the University of California. 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.
|
|
* 3. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* 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 "opt_mrouting.h"
|
|
#include "opt_ipsec.h"
|
|
#include "opt_inet.h"
|
|
#include "opt_inet6.h"
|
|
#include "opt_sctp.h"
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/domain.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/protosw.h>
|
|
#include <sys/queue.h>
|
|
#include <sys/sysctl.h>
|
|
|
|
#include <net/if.h>
|
|
#include <net/if_var.h>
|
|
#include <netinet/in.h>
|
|
#include <netinet/in_var.h>
|
|
|
|
/*
|
|
* While this file provides the domain and protocol switch tables for IPv4, it
|
|
* also provides the sysctl node declarations for net.inet.* often shared with
|
|
* IPv6 for common features or by upper layer protocols. In case of no IPv4
|
|
* support compile out everything but these sysctl nodes.
|
|
*/
|
|
#ifdef INET
|
|
/* netinet/raw_ip.c */
|
|
extern struct protosw rip_protosw;
|
|
/* netinet/udp_usrreq.c */
|
|
extern struct protosw udp_protosw, udplite_protosw;
|
|
/* netinet/tcp_usrreq.c */
|
|
extern struct protosw tcp_protosw;
|
|
/* netinet/sctp_usrreq.c */
|
|
extern struct protosw sctp_seqpacket_protosw, sctp_stream_protosw;
|
|
|
|
FEATURE(inet, "Internet Protocol version 4");
|
|
|
|
struct domain inetdomain = {
|
|
.dom_family = AF_INET,
|
|
.dom_name = "internet",
|
|
.dom_rtattach = in_inithead,
|
|
#ifdef VIMAGE
|
|
.dom_rtdetach = in_detachhead,
|
|
#endif
|
|
.dom_nprotosw = 14,
|
|
.dom_protosw = {
|
|
&tcp_protosw,
|
|
&udp_protosw,
|
|
#ifdef SCTP
|
|
&sctp_seqpacket_protosw,
|
|
&sctp_stream_protosw,
|
|
#else
|
|
NULL, NULL,
|
|
#endif
|
|
&udplite_protosw,
|
|
&rip_protosw,
|
|
/* Spacer 8 times for loadable protocols. XXXGL: why 8? */
|
|
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
|
|
},
|
|
};
|
|
|
|
DOMAIN_SET(inet);
|
|
#endif /* INET */
|
|
|
|
SYSCTL_NODE(_net, PF_INET, inet, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
|
|
"Internet Family");
|
|
|
|
SYSCTL_NODE(_net_inet, IPPROTO_IP, ip, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
|
|
"IP");
|
|
SYSCTL_NODE(_net_inet, IPPROTO_ICMP, icmp, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
|
|
"ICMP");
|
|
SYSCTL_NODE(_net_inet, IPPROTO_UDP, udp, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
|
|
"UDP");
|
|
SYSCTL_NODE(_net_inet, IPPROTO_UDPLITE, udplite, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
|
|
"UDP-Lite");
|
|
SYSCTL_NODE(_net_inet, IPPROTO_TCP, tcp, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
|
|
"TCP");
|
|
#if defined(SCTP) || defined(SCTP_SUPPORT)
|
|
SYSCTL_NODE(_net_inet, IPPROTO_SCTP, sctp, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
|
|
"SCTP");
|
|
#endif
|
|
SYSCTL_NODE(_net_inet, IPPROTO_IGMP, igmp, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
|
|
"IGMP");
|
|
#if defined(IPSEC) || defined(IPSEC_SUPPORT)
|
|
/* XXX no protocol # to use, pick something "reserved" */
|
|
SYSCTL_NODE(_net_inet, 253, ipsec, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
|
|
"IPSEC");
|
|
SYSCTL_NODE(_net_inet, IPPROTO_AH, ah, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
|
|
"AH");
|
|
SYSCTL_NODE(_net_inet, IPPROTO_ESP, esp, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
|
|
"ESP");
|
|
SYSCTL_NODE(_net_inet, IPPROTO_IPCOMP, ipcomp, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
|
|
"IPCOMP");
|
|
SYSCTL_NODE(_net_inet, IPPROTO_IPIP, ipip, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
|
|
"IPIP");
|
|
#endif /* IPSEC */
|
|
SYSCTL_NODE(_net_inet, IPPROTO_RAW, raw, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
|
|
"RAW");
|
|
SYSCTL_NODE(_net_inet, OID_AUTO, accf, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
|
|
"Accept filters");
|