Author: royger
Date: Fri Dec 18 14:56:49 2015
New Revision: 292439
URL: https://svnweb.freebsd.org/changeset/base/292439
Log:
MFC r291156:
Ignore the inbound checksum flags when doing packet forwarding in netvsc
driver.
Sponsored by: Microsoft OSTC
PR: 203630
Modified:
stable/10/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c
Directory Properties:
stable/10/ (props changed)
Modified: stable/10/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c
==============================================================================
--- stable/10/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c Fri Dec 18
14:52:12 2015 (r292438)
+++ stable/10/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c Fri Dec 18
14:56:49 2015 (r292439)
@@ -128,6 +128,15 @@ __FBSDID("$FreeBSD$");
#define HV_NV_SC_PTR_OFFSET_IN_BUF 0
#define HV_NV_PACKET_OFFSET_IN_BUF 16
+/*
+ * A unified flag for all outbound check sum flags is useful,
+ * and it helps avoiding unnecessary check sum calculation in
+ * network forwarding scenario.
+ */
+#define HV_CSUM_FOR_OUTBOUND \
+ (CSUM_IP|CSUM_IP_UDP|CSUM_IP_TCP|CSUM_IP_SCTP|CSUM_IP_TSO| \
+ CSUM_IP_ISCSI|CSUM_IP6_UDP|CSUM_IP6_TCP|CSUM_IP6_SCTP| \
+ CSUM_IP6_TSO|CSUM_IP6_ISCSI)
/*
* Data types
@@ -570,7 +579,8 @@ hn_start_locked(struct ifnet *ifp)
packet->vlan_tci & 0xfff;
}
- if (0 == m_head->m_pkthdr.csum_flags) {
+ /* Only check the flags for outbound and ignore the ones for
inbound */
+ if (0 == (m_head->m_pkthdr.csum_flags & HV_CSUM_FOR_OUTBOUND)) {
goto pre_send;
}
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