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Allow for vlan(4) ifnets to have overlapping unit numbers if they are

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created in separated vnets.  As a side-effect of having a separated
if_cloner instance for each vnet, all vlan ifnets created in a vnet
will be automatically destroyed when vnet teardown is initiated.

Disallow SIOCSETVLAN and SIOCGETVLAN ioctls on vlan ifnets which are
associated with physical ifnets residing in parent vnets.

This is an interim vlan-specific solution which will be superseded by a
more generic if_cloner V_irtualization change from p4.  For nooptions
VIMAGE builds, this should be a no-op change.

Discussed with:	bz
MFC after:	3 days
This commit is contained in:
Marko Zec 2010-11-22 23:35:29 +00:00
parent 96ecb95ed9
commit ccf7ba972c
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=215726
1 changed files with 42 additions and 0 deletions
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42
sys/net/if_vlan.c
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@ -206,6 +206,11 @@ static void vlan_iflladdr(void *arg, struct ifnet *ifp);
static struct if_clone vlan_cloner = IFC_CLONE_INITIALIZER(VLANNAME, NULL,
IF_MAXUNIT, NULL, vlan_clone_match, vlan_clone_create, vlan_clone_destroy);
#ifdef VIMAGE
static VNET_DEFINE(struct if_clone, vlan_cloner);
#define V_vlan_cloner VNET(vlan_cloner)
#endif
#ifndef VLAN_ARRAY
#define HASH(n, m) ((((n) >> 8) ^ ((n) >> 4) ^ (n)) & (m))
@ -588,7 +593,9 @@ vlan_modevent(module_t mod, int type, void *data)
vlan_input_p = vlan_input;
vlan_link_state_p = vlan_link_state;
vlan_trunk_cap_p = vlan_trunk_capabilities;
#ifndef VIMAGE
if_clone_attach(&vlan_cloner);
#endif
if (bootverbose)
printf("vlan: initialized, using "
#ifdef VLAN_ARRAY
@ -600,7 +607,9 @@ vlan_modevent(module_t mod, int type, void *data)
"\n");
break;
case MOD_UNLOAD:
#ifndef VIMAGE
if_clone_detach(&vlan_cloner);
#endif
EVENTHANDLER_DEREGISTER(ifnet_departure_event, ifdetach_tag);
EVENTHANDLER_DEREGISTER(iflladdr_event, iflladdr_tag);
vlan_input_p = NULL;
@ -625,6 +634,27 @@ static moduledata_t vlan_mod = {
DECLARE_MODULE(if_vlan, vlan_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
MODULE_VERSION(if_vlan, 3);
#ifdef VIMAGE
static void
vnet_vlan_init(const void *unused __unused)
{
V_vlan_cloner = vlan_cloner;
if_clone_attach(&V_vlan_cloner);
}
VNET_SYSINIT(vnet_vlan_init, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_ANY,
vnet_vlan_init, NULL);
static void
vnet_vlan_uninit(const void *unused __unused)
{
if_clone_detach(&V_vlan_cloner);
}
VNET_SYSUNINIT(vnet_vlan_uninit, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_FIRST,
vnet_vlan_uninit, NULL);
#endif
static struct ifnet *
vlan_clone_match_ethertag(struct if_clone *ifc, const char *name, int *tag)
{
@ -1432,6 +1462,12 @@ vlan_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
break;
case SIOCSETVLAN:
#ifdef VIMAGE
if (ifp->if_vnet != ifp->if_home_vnet) {
error = EPERM;
break;
}
#endif
error = copyin(ifr->ifr_data, &vlr, sizeof(vlr));
if (error)
break;
@ -1461,6 +1497,12 @@ vlan_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
break;
case SIOCGETVLAN:
#ifdef VIMAGE
if (ifp->if_vnet != ifp->if_home_vnet) {
error = EPERM;
break;
}
#endif
bzero(&vlr, sizeof(vlr));
VLAN_LOCK();
if (TRUNK(ifv) != NULL) {