freebsd-dev/sys/dev/pdq/pdq_ifsubr.c
Jonathan Lemon df5e198723 Lock down the network interface queues. The queue mutex must be obtained
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.
2000-11-25 07:35:38 +00:00

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/*-
* Copyright (c) 1995, 1996 Matt Thomas <matt@3am-software.com>
* 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. The name of the author may not be used to endorse or promote products
* derived from this software withough specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*
* $FreeBSD$
*
*/
/*
* DEC PDQ FDDI Controller; code for BSD derived operating systems
*
* This module provide bus independent BSD specific O/S functions.
* (ie. it provides an ifnet interface to the rest of the system)
*/
#include "opt_inet.h"
#include <sys/param.h>
#include <sys/socket.h>
#include <sys/sockio.h>
#if defined(__bsdi__) || defined(__NetBSD__)
#include <sys/device.h>
#endif
#include <net/if.h>
#include <net/if_dl.h>
#include <net/bpf.h>
#if defined(__FreeBSD__)
#ifdef INET
#include <netinet/in.h>
#include <netinet/if_ether.h>
#endif
#include <netinet/if_fddi.h>
#else
#include <net/if_fddi.h>
#endif
#if defined(__bsdi__)
#include <i386/isa/isavar.h>
#endif
#ifdef NS
#include <netns/ns.h>
#include <netns/ns_if.h>
#endif
#if defined(__FreeBSD__)
#include <dev/pdq/pdqvar.h>
#include <dev/pdq/pdqreg.h>
#else
#include "pdqvar.h"
#include "pdqreg.h"
#endif
#if defined(__bsdi__) && _BSDI_VERSION < 199506 /* XXX */
static void
arp_ifinit(
struct arpcom *ac,
struct ifaddr *ifa)
{
sc->sc_ac.ac_ipaddr = IA_SIN(ifa)->sin_addr;
arpwhohas(&sc->sc_ac, &IA_SIN(ifa)->sin_addr);
#if _BSDI_VERSION >= 199401
ifa->ifa_rtrequest = arp_rtrequest;
ifa->ifa_flags |= RTF_CLONING;
#endif
}
#endif
void
pdq_ifinit(
pdq_softc_t *sc)
{
if (sc->sc_if.if_flags & IFF_UP) {
sc->sc_if.if_flags |= IFF_RUNNING;
if (sc->sc_if.if_flags & IFF_PROMISC) {
sc->sc_pdq->pdq_flags |= PDQ_PROMISC;
} else {
sc->sc_pdq->pdq_flags &= ~PDQ_PROMISC;
}
if (sc->sc_if.if_flags & IFF_ALLMULTI) {
sc->sc_pdq->pdq_flags |= PDQ_ALLMULTI;
} else {
sc->sc_pdq->pdq_flags &= ~PDQ_ALLMULTI;
}
if (sc->sc_if.if_flags & IFF_LINK1) {
sc->sc_pdq->pdq_flags |= PDQ_PASS_SMT;
} else {
sc->sc_pdq->pdq_flags &= ~PDQ_PASS_SMT;
}
sc->sc_pdq->pdq_flags |= PDQ_RUNNING;
pdq_run(sc->sc_pdq);
} else {
sc->sc_if.if_flags &= ~IFF_RUNNING;
sc->sc_pdq->pdq_flags &= ~PDQ_RUNNING;
pdq_stop(sc->sc_pdq);
}
}
void
pdq_ifwatchdog(
struct ifnet *ifp)
{
/*
* No progress was made on the transmit queue for PDQ_OS_TX_TRANSMIT
* seconds. Remove all queued packets.
*/
ifp->if_flags &= ~IFF_OACTIVE;
ifp->if_timer = 0;
IF_DRAIN(&ifp->if_snd);
}
ifnet_ret_t
pdq_ifstart(
struct ifnet *ifp)
{
pdq_softc_t *sc = (pdq_softc_t *) ((caddr_t) ifp - offsetof(pdq_softc_t, sc_ac.ac_if));
struct ifqueue *ifq = &ifp->if_snd;
struct mbuf *m;
int tx = 0;
if ((ifp->if_flags & IFF_RUNNING) == 0)
return;
if (sc->sc_if.if_timer == 0)
sc->sc_if.if_timer = PDQ_OS_TX_TIMEOUT;
if ((sc->sc_pdq->pdq_flags & PDQ_TXOK) == 0) {
sc->sc_if.if_flags |= IFF_OACTIVE;
return;
}
for (;; tx = 1) {
IF_DEQUEUE(ifq, m);
if (m == NULL)
break;
if (pdq_queue_transmit_data(sc->sc_pdq, m) == PDQ_FALSE) {
ifp->if_flags |= IFF_OACTIVE;
IF_PREPEND(ifq, m);
break;
}
}
if (tx)
PDQ_DO_TYPE2_PRODUCER(sc->sc_pdq);
}
void
pdq_os_receive_pdu(
pdq_t *pdq,
struct mbuf *m,
size_t pktlen)
{
pdq_softc_t *sc = (pdq_softc_t *) pdq->pdq_os_ctx;
struct fddi_header *fh = mtod(m, struct fddi_header *);
sc->sc_if.if_ipackets++;
if (sc->sc_bpf != NULL)
PDQ_BPF_MTAP(sc, m);
if ((fh->fddi_fc & (FDDIFC_L|FDDIFC_F)) != FDDIFC_LLC_ASYNC) {
m_freem(m);
return;
}
m->m_data += sizeof(struct fddi_header);
m->m_len -= sizeof(struct fddi_header);
m->m_pkthdr.len = pktlen - sizeof(struct fddi_header);
m->m_pkthdr.rcvif = &sc->sc_if;
fddi_input(&sc->sc_if, fh, m);
}
void
pdq_os_restart_transmitter(
pdq_t *pdq)
{
pdq_softc_t *sc = (pdq_softc_t *) pdq->pdq_os_ctx;
sc->sc_if.if_flags &= ~IFF_OACTIVE;
if (sc->sc_if.if_snd.ifq_head != NULL) {
sc->sc_if.if_timer = PDQ_OS_TX_TIMEOUT;
pdq_ifstart(&sc->sc_if);
} else {
sc->sc_if.if_timer = 0;
}
}
void
pdq_os_transmit_done(
pdq_t *pdq,
struct mbuf *m)
{
pdq_softc_t *sc = (pdq_softc_t *) pdq->pdq_os_ctx;
if (sc->sc_bpf != NULL)
PDQ_BPF_MTAP(sc, m);
m_freem(m);
sc->sc_if.if_opackets++;
}
void
pdq_os_addr_fill(
pdq_t *pdq,
pdq_lanaddr_t *addr,
size_t num_addrs)
{
pdq_softc_t *sc = (pdq_softc_t *) pdq->pdq_os_ctx;
struct ifmultiaddr *ifma;
for (ifma = sc->sc_if.if_multiaddrs.lh_first; ifma && num_addrs > 0;
ifma = ifma->ifma_link.le_next) {
char *mcaddr;
if (ifma->ifma_addr->sa_family != AF_LINK)
continue;
mcaddr = LLADDR((struct sockaddr_dl *)ifma->ifma_addr);
((u_short *) addr->lanaddr_bytes)[0] = ((u_short *) mcaddr)[0];
((u_short *) addr->lanaddr_bytes)[1] = ((u_short *) mcaddr)[1];
((u_short *) addr->lanaddr_bytes)[2] = ((u_short *) mcaddr)[2];
addr++;
num_addrs--;
}
}
int
pdq_ifioctl(
struct ifnet *ifp,
ioctl_cmd_t cmd,
caddr_t data)
{
pdq_softc_t *sc = (pdq_softc_t *) ((caddr_t) ifp - offsetof(pdq_softc_t, sc_ac.ac_if));
int s, error = 0;
s = splimp();
switch (cmd) {
case SIOCSIFADDR: {
struct ifaddr *ifa = (struct ifaddr *)data;
ifp->if_flags |= IFF_UP;
switch(ifa->ifa_addr->sa_family) {
#if defined(INET)
case AF_INET: {
pdq_ifinit(sc);
arp_ifinit(&sc->sc_ac, ifa);
break;
}
#endif /* INET */
#if defined(NS)
/* This magic copied from if_is.c; I don't use XNS,
* so I have no way of telling if this actually
* works or not.
*/
case AF_NS: {
struct ns_addr *ina = &(IA_SNS(ifa)->sns_addr);
if (ns_nullhost(*ina)) {
ina->x_host = *(union ns_host *)(sc->sc_ac.ac_enaddr);
} else {
ifp->if_flags &= ~IFF_RUNNING;
bcopy((caddr_t)ina->x_host.c_host,
(caddr_t)sc->sc_ac.ac_enaddr,
sizeof sc->sc_ac.ac_enaddr);
}
pdq_ifinit(sc);
break;
}
#endif /* NS */
default: {
pdq_ifinit(sc);
break;
}
}
break;
}
case SIOCGIFADDR: {
struct ifreq *ifr = (struct ifreq *)data;
bcopy((caddr_t) sc->sc_ac.ac_enaddr,
(caddr_t) ((struct sockaddr *)&ifr->ifr_data)->sa_data,
6);
break;
}
case SIOCSIFFLAGS: {
pdq_ifinit(sc);
break;
}
case SIOCADDMULTI:
case SIOCDELMULTI:
/*
* Update multicast listeners
*/
if (sc->sc_if.if_flags & IFF_RUNNING)
pdq_run(sc->sc_pdq);
error = 0;
break;
#if defined(SIOCSIFMTU)
#if !defined(ifr_mtu)
#define ifr_mtu ifr_metric
#endif
case SIOCSIFMTU: {
struct ifreq *ifr = (struct ifreq *)data;
/*
* Set the interface MTU.
*/
if (ifr->ifr_mtu > FDDIMTU) {
error = EINVAL;
break;
}
ifp->if_mtu = ifr->ifr_mtu;
break;
}
#endif /* SIOCSIFMTU */
default: {
error = EINVAL;
break;
}
}
splx(s);
return error;
}
#ifndef IFF_NOTRAILERS
#define IFF_NOTRAILERS 0
#endif
void
pdq_ifattach(
pdq_softc_t *sc,
ifnet_ret_t (*ifwatchdog)(int unit))
{
struct ifnet *ifp = &sc->sc_if;
ifp->if_flags = IFF_BROADCAST|IFF_SIMPLEX|IFF_NOTRAILERS|IFF_MULTICAST;
#if (defined(__FreeBSD__) && BSD >= 199506) || defined(__NetBSD__)
ifp->if_watchdog = pdq_ifwatchdog;
#else
ifp->if_watchdog = ifwatchdog;
#endif
ifp->if_ioctl = pdq_ifioctl;
ifp->if_output = fddi_output;
ifp->if_start = pdq_ifstart;
ifp->if_snd.ifq_maxlen = IFQ_MAXLEN;
#warning "Implement fddi_resolvemulti!"
/* ifp->if_resolvemulti = ether_resolvemulti; XXX */
if_attach(ifp);
fddi_ifattach(ifp);
PDQ_BPFATTACH(sc, DLT_FDDI, sizeof(struct fddi_header));
}