diff options
| author | phk <phk@FreeBSD.org> | 2001-01-24 20:59:34 +0000 |
|---|---|---|
| committer | phk <phk@FreeBSD.org> | 2001-01-24 20:59:34 +0000 |
| commit | 43df074e7c5ac8d62a9cdc1e1506fea5e1ae0151 (patch) | |
| tree | ed9808e2e17066d5fb394fb722bf6e05f21df500 /sys/net/if_tap.c | |
| parent | 9f8dbccd5690e7781a608a577902eb6238522fc3 (diff) | |
| download | FreeBSD-src-43df074e7c5ac8d62a9cdc1e1506fea5e1ae0151.zip FreeBSD-src-43df074e7c5ac8d62a9cdc1e1506fea5e1ae0151.tar.gz | |
DEVFS cloning for if_tap.
Submitted by: Maksim Yevmenkin <m_evmenkin@yahoo.com>
Diffstat (limited to 'sys/net/if_tap.c')
| -rw-r--r-- | sys/net/if_tap.c | 52 |
1 files changed, 47 insertions, 5 deletions
diff --git a/sys/net/if_tap.c b/sys/net/if_tap.c index 504c932..2848749 100644 --- a/sys/net/if_tap.c +++ b/sys/net/if_tap.c @@ -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); @@ -190,6 +197,41 @@ tapmodevent(mod, type, data) /* + * 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 * * to create interface |
