D11948.id31852.diff
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D11948.id31852.diff
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	Index: sys/dev/hyperv/netvsc/if_hn.c
	===================================================================
	--- sys/dev/hyperv/netvsc/if_hn.c
	+++ sys/dev/hyperv/netvsc/if_hn.c
	@@ -1266,16 +1266,37 @@
	rm_runlock(&hn_vfmap_lock, &pt);

	if (hn_ifp != NULL) {
	- /*
	- * Fix up rcvif and go through hn(4)'s if_input and
	- * increase ipackets.
	- */
	for (mn = m; mn != NULL; mn = mn->m_nextpkt) {
	- /* Allow tapping on the VF. */
	+ /*
	+ * Allow tapping on the VF.
	+ */
	ETHER_BPF_MTAP(vf_ifp, mn);
	+
	+ /*
	+ * Update VF stats.
	+ */
	+ if ((vf_ifp->if_capenable & IFCAP_HWSTATS) == 0) {
	+ if_inc_counter(vf_ifp, IFCOUNTER_IBYTES,
	+ mn->m_pkthdr.len);
	+ }
	+ /*
	+ * XXX IFCOUNTER_IMCAST
	+ * This stat updating is kinda invasive, since it
	+ * requires two checks on the mbuf: the length check
	+ * and the ethernet header check. As of this write,
	+ * all multicast packets go directly to hn(4), which
	+ * makes imcast stat updating in the VF a try in vian.
	+ */
	+
	+ /*
	+ * Fix up rcvif and increase hn(4)'s ipackets.
	+ */
	mn->m_pkthdr.rcvif = hn_ifp;
	if_inc_counter(hn_ifp, IFCOUNTER_IPACKETS, 1);
	}
	+ /*
	+ * Go through hn(4)'s if_input.
	+ */
	hn_ifp->if_input(hn_ifp, m);
	} else {
	/*