int
pppoutput(struct ifnet *ifp, struct mbuf *m0, struct sockaddr *dst,
struct rtentry *rtp)
{
int error;
ifnet_serialize_tx(ifp);
error = pppoutput_serialized(ifp, m0, dst, rtp);
ifnet_deserialize_tx(ifp);
return error;
}
static int
ng_iface_output(struct ifnet *ifp, struct mbuf *m,
struct sockaddr *dst, struct rtentry *rt0)
{
const struct ifaltq_subque *ifsq = ifq_get_subq_default(&ifp->if_snd);
int error;
ifnet_serialize_tx(ifp, ifsq);
error = ng_iface_output_serialized(ifp, m, dst, rt0);
ifnet_deserialize_tx(ifp, ifsq);
return error;
}
void
vlan_start_dispatch(netmsg_t msg)
{
struct netmsg_packet *nmp = &msg->packet;
struct mbuf *m;
struct ifnet *ifp;
struct altq_pktattr pktattr;
m = nmp->nm_packet;
ifp = msg->lmsg.u.ms_resultp;
M_ASSERTPKTHDR(m);
KASSERT(m->m_flags & M_VLANTAG, ("mbuf has not been vlan tagged!"));
ifnet_serialize_tx(ifp);
/*
* Make sure that the interface is still UP and RUNNING,
* since interface state may have been changed when the
* mbuf is pending on the msgport.
*/
if ((ifp->if_flags & (IFF_UP | IFF_RUNNING)) !=
(IFF_UP | IFF_RUNNING)) {
m_freem(m);
goto back;
}
/*
* If ALTQ is enabled on the parent interface, do
* classification; the queueing discipline might
* not require classification, but might require
* the address family/header pointer in the pktattr.
*/
if (ifq_is_enabled(&ifp->if_snd))
altq_etherclassify(&ifp->if_snd, m, &pktattr);
/*
* If underlying interface can do VLAN tag insertion itself,
* just pass the packet along.
*/
if ((ifp->if_capenable & IFCAP_VLAN_HWTAGGING) == 0) {
uint16_t vlantag = m->m_pkthdr.ether_vlantag;
struct ether_vlan_header *evl;
M_PREPEND(m, EVL_ENCAPLEN, MB_DONTWAIT);
if (m == NULL) {
if_printf(ifp, "vlan%u M_PREPEND failed", vlantag);
goto back;
}
/* M_PREPEND takes care of m_len, m_pkthdr.len for us */
m = m_pullup(m, ETHER_HDR_LEN + EVL_ENCAPLEN);
if (m == NULL) {
if_printf(ifp, "vlan%u m_pullup failed", vlantag);
goto back;
}
m->m_pkthdr.csum_lhlen = sizeof(struct ether_vlan_header);
/*
* Transform the Ethernet header into an Ethernet header
* with 802.1Q encapsulation.
*/
bcopy(mtod(m, char *) + EVL_ENCAPLEN, mtod(m, char *),
sizeof(struct ether_header));
evl = mtod(m, struct ether_vlan_header *);
evl->evl_proto = evl->evl_encap_proto;
evl->evl_encap_proto = htons(ETHERTYPE_VLAN);
evl->evl_tag = htons(vlantag);
#ifdef DEBUG
kprintf("vlan_start: %*D\n", (int)sizeof *evl,
(unsigned char *)evl, ":");
#endif
/* Hardware does not need to setup vlan tagging */
m->m_flags &= ~M_VLANTAG;
}