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Introduce network device nodes. Network devices will now automatically

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appear in /dev.  Interface hardware ioctls (not protocol or routing) can
be performed on the descriptor.  The SIOCGIFCONF ioctl may be performed
on the special /dev/network node.
This commit is contained in:
Jonathan Lemon 2001-09-29 05:55:04 +00:00
parent a35b06c555
commit f13ad20660
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=84106
2 changed files with 158 additions and 63 deletions
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1
sys/conf/majors
View File

@ -180,6 +180,7 @@ chrdev name comments
162 digi Digiboard
163 gdt ICP Vortex RAID controller
164 src Intel SRC RAID controller
165 net Network drivers <jlemon>
200 ?? entries from 200-252 are reserved for local use
252 ?? entries from 200-252 are reserved for local use
254 internal Used internally by the kernel

220
sys/net/if.c
View File

@ -39,6 +39,7 @@
#include "opt_inet.h"
#include <sys/param.h>
#include <sys/conf.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/systm.h>
@ -80,6 +81,7 @@ static void link_rtrequest(int, struct rtentry *, struct sockaddr *);
static int if_rtdel(struct radix_node *, void *);
static struct if_clone *if_clone_lookup(const char *, int *);
static int if_clone_list(struct if_clonereq *);
static int ifhwioctl(u_long, struct ifnet *, caddr_t, struct thread *);
#ifdef INET6
/*
* XXX: declare here to avoid to include many inet6 related files..
@ -96,6 +98,7 @@ int if_cloners_count;
LIST_HEAD(, if_clone) if_cloners = LIST_HEAD_INITIALIZER(if_cloners);
static int if_indexlim = 8;
static struct klist ifklist;
/*
* System initialization
@ -106,6 +109,69 @@ SYSINIT(interface_check, SI_SUB_PROTO_IF, SI_ORDER_FIRST, if_check, NULL)
MALLOC_DEFINE(M_IFADDR, "ifaddr", "interface address");
MALLOC_DEFINE(M_IFMADDR, "ether_multi", "link-level multicast address");
#define CDEV_MAJOR 165
static d_open_t netopen;
static d_close_t netclose;
static d_ioctl_t netioctl;
static struct cdevsw net_cdevsw = {
/* open */ netopen,
/* close */ netclose,
/* read */ noread,
/* write */ nowrite,
/* ioctl */ netioctl,
/* poll */ nopoll,
/* mmap */ nommap,
/* strategy */ nostrategy,
/* name */ "net",
/* maj */ CDEV_MAJOR,
/* dump */ nodump,
/* psize */ nopsize,
/* flags */ 0
};
static int
netopen(dev_t dev, int flag, int mode, struct thread *td)
{
return (0);
}
static int
netclose(dev_t dev, int flags, int fmt, struct thread *td)
{
return (0);
}
static int
netioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct thread *td)
{
struct ifnet *ifp;
int error, idx;
/* only support interface specific ioctls */
if (IOCGROUP(cmd) != 'i')
return (EOPNOTSUPP);
idx = minor(dev);
if (idx == 0) {
/*
* special network device, not interface.
*/
if (cmd == SIOCGIFCONF)
return (ifconf(cmd, data)); /* XXX remove cmd */
return (EOPNOTSUPP);
}
ifp = ifnet_byindex(idx);
if (ifp == NULL)
return (ENXIO);
error = ifhwioctl(cmd, ifp, data, td);
if (error == ENOIOCTL)
error = EOPNOTSUPP;
return (error);
}
/*
* Network interface utility routines.
*
@ -119,7 +185,10 @@ if_init(dummy)
{
TAILQ_INIT(&ifnet);
SLIST_INIT(&ifklist);
if_grow(); /* create initial table */
ifdev_byindex(0) = make_dev(&net_cdevsw, 0,
UID_ROOT, GID_WHEEL, 0600, "network");
}
static void
@ -194,6 +263,12 @@ if_attach(ifp)
if_grow();
ifnet_byindex(if_index) = ifp;
ifdev_byindex(if_index) = make_dev(&net_cdevsw, if_index,
UID_ROOT, GID_WHEEL, 0600, "%s%d", ifp->if_name, ifp->if_unit);
#if 0
make_dev_alias(ifdev_byindex(if_index), "%s%d", "net", if_index - 1);
#endif
mtx_init(&ifp->if_snd.ifq_mtx, ifp->if_name, MTX_DEF);
/*
@ -255,6 +330,8 @@ if_detach(ifp)
* Clean up all addresses.
*/
ifaddr_byindex(ifp->if_index) = NULL;
destroy_dev(ifdev_byindex(ifp->if_index));
ifdev_byindex(ifp->if_index) = NULL;
while (if_index > 0 && ifaddr_byindex(if_index) == NULL)
if_index--;
@ -947,49 +1024,18 @@ if_withname(sa)
return ifunit(ifname);
}
/*
* Interface ioctls.
* Hardware specific interface ioctls.
*/
int
ifioctl(so, cmd, data, td)
struct socket *so;
u_long cmd;
caddr_t data;
struct thread *td;
static int
ifhwioctl(u_long cmd, struct ifnet *ifp, caddr_t data, struct thread *td)
{
register struct ifnet *ifp;
register struct ifreq *ifr;
struct ifreq *ifr;
struct ifstat *ifs;
int error;
short oif_flags;
int error = 0;
switch (cmd) {
case SIOCGIFCONF:
case OSIOCGIFCONF:
return (ifconf(cmd, data));
}
ifr = (struct ifreq *)data;
switch (cmd) {
case SIOCIFCREATE:
case SIOCIFDESTROY:
if ((error = suser_td(td)) != 0)
return (error);
return ((cmd == SIOCIFCREATE) ?
if_clone_create(ifr->ifr_name, sizeof(ifr->ifr_name)) :
if_clone_destroy(ifr->ifr_name));
case SIOCIFGCLONERS:
return (if_clone_list((struct if_clonereq *)data));
}
ifp = ifunit(ifr->ifr_name);
if (ifp == 0)
return (ENXIO);
switch (cmd) {
case SIOCGIFFLAGS:
ifr->ifr_flags = ifp->if_flags;
break;
@ -1071,10 +1117,10 @@ ifioctl(so, cmd, data, td)
error = suser_td(td);
if (error)
return (error);
if (ifp->if_ioctl == NULL)
return (EOPNOTSUPP);
if (ifr->ifr_mtu < IF_MINMTU || ifr->ifr_mtu > IF_MAXMTU)
return (EINVAL);
if (ifp->if_ioctl == NULL)
return (EOPNOTSUPP);
error = (*ifp->if_ioctl)(ifp, cmd, data);
if (error == 0) {
getmicrotime(&ifp->if_lastchange);
@ -1088,7 +1134,7 @@ ifioctl(so, cmd, data, td)
nd6_setmtu(ifp);
#endif
}
return (error);
break;
}
case SIOCADDMULTI:
@ -1099,11 +1145,11 @@ ifioctl(so, cmd, data, td)
/* Don't allow group membership on non-multicast interfaces. */
if ((ifp->if_flags & IFF_MULTICAST) == 0)
return EOPNOTSUPP;
return (EOPNOTSUPP);
/* Don't let users screw up protocols' entries. */
if (ifr->ifr_addr.sa_family != AF_LINK)
return EINVAL;
return (EINVAL);
if (cmd == SIOCADDMULTI) {
struct ifmultiaddr *ifma;
@ -1113,7 +1159,7 @@ ifioctl(so, cmd, data, td)
}
if (error == 0)
getmicrotime(&ifp->if_lastchange);
return error;
break;
case SIOCSIFPHYADDR:
case SIOCDIFPHYADDR:
@ -1126,12 +1172,12 @@ ifioctl(so, cmd, data, td)
error = suser_td(td);
if (error)
return (error);
if (ifp->if_ioctl == 0)
if (ifp->if_ioctl == NULL)
return (EOPNOTSUPP);
error = (*ifp->if_ioctl)(ifp, cmd, data);
if (error == 0)
getmicrotime(&ifp->if_lastchange);
return error;
break;
case SIOCGIFSTATUS:
ifs = (struct ifstat *)data;
@ -1144,25 +1190,76 @@ ifioctl(so, cmd, data, td)
case SIOCGIFGENERIC:
if (ifp->if_ioctl == 0)
return (EOPNOTSUPP);
return ((*ifp->if_ioctl)(ifp, cmd, data));
error = (*ifp->if_ioctl)(ifp, cmd, data);
break;
case SIOCSIFLLADDR:
error = suser_td(td);
if (error)
return (error);
return if_setlladdr(ifp,
error = if_setlladdr(ifp,
ifr->ifr_addr.sa_data, ifr->ifr_addr.sa_len);
break;
default:
oif_flags = ifp->if_flags;
if (so->so_proto == 0)
return (EOPNOTSUPP);
error = ENOIOCTL;
break;
}
return (error);
}
/*
* Interface ioctls.
*/
int
ifioctl(so, cmd, data, td)
struct socket *so;
u_long cmd;
caddr_t data;
struct thread *td;
{
struct ifnet *ifp;
struct ifreq *ifr;
int error;
short oif_flags;
switch (cmd) {
case SIOCGIFCONF:
case OSIOCGIFCONF:
return (ifconf(cmd, data));
}
ifr = (struct ifreq *)data;
switch (cmd) {
case SIOCIFCREATE:
case SIOCIFDESTROY:
if ((error = suser_td(td)) != 0)
return (error);
return ((cmd == SIOCIFCREATE) ?
if_clone_create(ifr->ifr_name, sizeof(ifr->ifr_name)) :
if_clone_destroy(ifr->ifr_name));
case SIOCIFGCLONERS:
return (if_clone_list((struct if_clonereq *)data));
}
ifp = ifunit(ifr->ifr_name);
if (ifp == 0)
return (ENXIO);
error = ifhwioctl(cmd, ifp, data, td);
if (error != ENOIOCTL)
return (error);
oif_flags = ifp->if_flags;
if (so->so_proto == 0)
return (EOPNOTSUPP);
#ifndef COMPAT_43
error = ((*so->so_proto->pr_usrreqs->pru_control)(so, cmd,
error = ((*so->so_proto->pr_usrreqs->pru_control)(so, cmd,
data,
ifp, td));
#else
{
{
int ocmd = cmd;
switch (cmd) {
@ -1211,23 +1308,20 @@ ifioctl(so, cmd, data, td)
*(u_short *)&ifr->ifr_addr = ifr->ifr_addr.sa_family;
}
}
}
#endif /* COMPAT_43 */
if ((oif_flags ^ ifp->if_flags) & IFF_UP) {
if ((oif_flags ^ ifp->if_flags) & IFF_UP) {
#ifdef INET6
DELAY(100);/* XXX: temporal workaround for fxp issue*/
if (ifp->if_flags & IFF_UP) {
int s = splimp();
in6_if_up(ifp);
splx(s);
}
#endif
DELAY(100);/* XXX: temporal workaround for fxp issue*/
if (ifp->if_flags & IFF_UP) {
int s = splimp();
in6_if_up(ifp);
splx(s);
}
return (error);
#endif
}
return (0);
return (error);
}
/*