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DEVFS cloning for if_tap.

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Submitted by:	Maksim Yevmenkin <m_evmenkin@yahoo.com>
This commit is contained in:
Poul-Henning Kamp 2001-01-24 20:59:34 +00:00
parent 77e9b2790e
commit b8627aab72
1 changed files with 47 additions and 5 deletions
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52
sys/net/if_tap.c
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@ -79,6 +79,7 @@
static int tapmodevent __P((module_t, int, void *));
/* device */
static void tapclone __P((void *, char *, int, dev_t *));
static void tapcreate __P((dev_t));
/* network interface */
@ -131,27 +132,33 @@ tapmodevent(mod, type, data)
int type;
void *data;
{
static int attached = 0;
struct ifnet *ifp = NULL;
int unit, s;
static int attached = 0;
static eventhandler_tag eh_tag = NULL;
switch (type) {
case MOD_LOAD:
if (attached)
return (EEXIST);
eh_tag = EVENTHANDLER_REGISTER(dev_clone, tapclone, 0, 1000);
cdevsw_add(&tap_cdevsw);
attached = 1;
break;
case MOD_UNLOAD:
case MOD_UNLOAD: {
int unit;
if (taprefcnt > 0)
return (EBUSY);
EVENTHANDLER_DEREGISTER(dev_clone, eh_tag);
cdevsw_remove(&tap_cdevsw);
unit = 0;
while (unit <= taplastunit) {
int s;
struct ifnet *ifp = NULL;
s = splimp();
TAILQ_FOREACH(ifp, &ifnet, if_link)
if ((strcmp(ifp->if_name, TAP) == 0) ||
@ -179,7 +186,7 @@ tapmodevent(mod, type, data)
}
attached = 0;
break;
} break;
default:
return (EOPNOTSUPP);
@ -189,6 +196,41 @@ tapmodevent(mod, type, data)
} /* tapmodevent */
/*
* DEVFS handler
*
* We need to support two kind of devices - tap and vmnet
*/
static void
tapclone(arg, name, namelen, dev)
void *arg;
char *name;
int namelen;
dev_t *dev;
{
int unit, minor;
char *device_name = NULL;
if (*dev != NODEV)
return;
device_name = TAP;
if (dev_stdclone(name, NULL, device_name, &unit) != 1) {
device_name = VMNET;
if (dev_stdclone(name, NULL, device_name, &unit) != 1)
return;
minor = (unit | VMNET_DEV_MASK);
}
else
minor = unit;
*dev = make_dev(&tap_cdevsw, minor, UID_ROOT, GID_WHEEL, 0600, "%s%d",
device_name, unit);
} /* tapclone */
/*
* tapcreate
*