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before adding/removing packets from the queue. Also, the if_obytes and if_omcasts fields should only be manipulated under protection of the mutex. IF_ENQUEUE, IF_PREPEND, and IF_DEQUEUE perform all necessary locking on the queue. An IF_LOCK macro is provided, as well as the old (mutex-less) versions of the macros in the form _IF_ENQUEUE, _IF_QFULL, for code which needs them, but their use is discouraged. Two new macros are introduced: IF_DRAIN() to drain a queue, and IF_HANDOFF, which takes care of locking/enqueue, and also statistics updating/start if necessary.
133 lines
3.7 KiB
C
133 lines
3.7 KiB
C
/* $NetBSD: natm_proto.c,v 1.3 1996/09/18 00:56:41 chuck Exp $ */
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/*
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*
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* Copyright (c) 1996 Charles D. Cranor and Washington University.
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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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Charles D. Cranor and
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* Washington University.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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/*
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* protocol layer for access to native mode ATM
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/socket.h>
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#include <sys/protosw.h>
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#include <sys/domain.h>
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#include <net/if.h>
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#include <net/intrq.h>
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#include <netinet/in.h>
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#include <netnatm/natm.h>
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extern struct domain natmdomain;
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static void natm_init __P((void));
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static struct protosw natmsw[] = {
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{ SOCK_STREAM, &natmdomain, PROTO_NATMAAL5, PR_CONNREQUIRED,
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0, 0, 0, 0,
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#ifdef FREEBSD_USRREQS
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0,
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#else
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natm_usrreq,
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#endif
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0, 0, 0, 0,
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#if defined(__NetBSD__) || defined(__OpenBSD__)
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natm5_sysctl
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#elif defined(FREEBSD_USRREQS)
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&natm_usrreqs
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#endif
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},
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{ SOCK_DGRAM, &natmdomain, PROTO_NATMAAL5, PR_CONNREQUIRED | PR_ATOMIC,
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0, 0, 0, 0,
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#ifdef FREEBSD_USRREQS
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0,
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#else
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natm_usrreq,
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#endif
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0, 0, 0, 0,
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#if defined(__NetBSD__) || defined(__OpenBSD__)
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natm5_sysctl
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#elif defined(FREEBSD_USRREQS)
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&natm_usrreqs
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#endif
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},
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{ SOCK_STREAM, &natmdomain, PROTO_NATMAAL0, PR_CONNREQUIRED,
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0, 0, 0, 0,
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#ifdef FREEBSD_USRREQS
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0,
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#else
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natm_usrreq,
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#endif
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0, 0, 0, 0,
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#if defined(__NetBSD__) || defined(__OpenBSD__)
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natm0_sysctl
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#elif defined(FREEBSD_USRREQS)
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&natm_usrreqs
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#endif
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},
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};
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static struct domain natmdomain =
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{ AF_NATM, "natm", natm_init, 0, 0,
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natmsw, &natmsw[sizeof(natmsw)/sizeof(natmsw[0])], 0,
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0, 0, 0};
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static int natmqmaxlen = IFQ_MAXLEN; /* max # of packets on queue */
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#ifdef NATM_STAT
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u_int natm_sodropcnt = 0; /* # mbufs dropped due to full sb */
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u_int natm_sodropbytes = 0; /* # of bytes dropped */
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u_int natm_sookcnt = 0; /* # mbufs ok */
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u_int natm_sookbytes = 0; /* # of bytes ok */
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#endif
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const int natmintrq_present = 1;
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void natm_init()
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{
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LIST_INIT(&natm_pcbs);
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bzero(&natmintrq, sizeof(natmintrq));
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natmintrq.ifq_maxlen = natmqmaxlen;
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mtx_init(&natmintrq.ifq_mtx, "natm_inq", MTX_DEF);
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}
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#if defined(__FreeBSD__)
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DOMAIN_SET(natm);
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#endif
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