From 205b80ebad275377da256ea3f761810b535df2d0 Mon Sep 17 00:00:00 2001 From: Anand Kumar Date: Tue, 15 May 2018 16:38:00 -0700 Subject: datapath-windows: Add support for handling DEI bit of VLAN header The Drop eligible indicator(DEI) is 1 bit wide and it is part of Tag control information (TCI) in VLAN header, which indicates that the frame can be dropped during congestion. Signed-off-by: Anand Kumar Acked-by: Alin Gabriel Serdean Signed-off-by: Alin Gabriel Serdean --- datapath-windows/ovsext/User.c | 19 +++++++++++++------ 1 file changed, 13 insertions(+), 6 deletions(-) (limited to 'datapath-windows/ovsext/User.c') diff --git a/datapath-windows/ovsext/User.c b/datapath-windows/ovsext/User.c index 4693a8b55..509472f23 100644 --- a/datapath-windows/ovsext/User.c +++ b/datapath-windows/ovsext/User.c @@ -1000,11 +1000,12 @@ OvsCreateQueueNlPacket(PVOID userData, POVS_PACKET_HDR_INFO hdrInfo) { #define VLAN_TAG_SIZE 4 - UINT32 allocLen, dataLen, extraLen; + UINT32 allocLen, dataLen, extraLen = 0; POVS_PACKET_QUEUE_ELEM elem; UINT8 *src, *dst; NDIS_TCP_IP_CHECKSUM_NET_BUFFER_LIST_INFO csumInfo; - NDIS_NET_BUFFER_LIST_8021Q_INFO vlanInfo; + PNDIS_NET_BUFFER_LIST_8021Q_INFO vlanInfo = NULL; + PVOID vlanTag; OvsIPv4TunnelKey *tunnelKey = (OvsIPv4TunnelKey *)&key->tunKey; UINT32 pid; UINT32 nlMsgSize; @@ -1037,8 +1038,13 @@ OvsCreateQueueNlPacket(PVOID userData, return NULL; } - vlanInfo.Value = NET_BUFFER_LIST_INFO(nbl, Ieee8021QNetBufferListInfo); - extraLen = vlanInfo.TagHeader.VlanId ? VLAN_TAG_SIZE : 0; + vlanTag = NET_BUFFER_LIST_INFO(nbl, Ieee8021QNetBufferListInfo); + if (vlanTag) { + vlanInfo = (PNDIS_NET_BUFFER_LIST_8021Q_INFO)(PVOID *)&vlanTag; + if (vlanInfo->Value) { + extraLen = VLAN_TAG_SIZE; + } + } dataLen = NET_BUFFER_DATA_LENGTH(nb); @@ -1148,8 +1154,9 @@ OvsCreateQueueNlPacket(PVOID userData, ((UINT32 *)dst)[2] = ((UINT32 *)src)[2]; dst += 12; ((UINT16 *)dst)[0] = htons(0x8100); - ((UINT16 *)dst)[1] = htons(vlanInfo.TagHeader.VlanId | - (vlanInfo.TagHeader.UserPriority << 13)); + ((UINT16 *)dst)[1] = htons(vlanInfo->TagHeader.VlanId | + (vlanInfo->TagHeader.CanonicalFormatId << 12) | + (vlanInfo->TagHeader.UserPriority << 13)); elem->hdrInfo.l3Offset += VLAN_TAG_SIZE; elem->hdrInfo.l4Offset += VLAN_TAG_SIZE; ovsUserStats.vlanInsert++; -- cgit v1.2.1