From: Ronak Doshi <doshir@vmware.com>
Date: Fri, 29 May 2020 02:53:52 +0000 (-0700)
Subject: vmxnet3: use correct hdr reference when packet is encapsulated
X-Git-Tag: baikal/mips/sdk5.9~13530^2~65
X-Git-Url: https://git.baikalelectronics.ru/sdk/?a=commitdiff_plain;h=6ca6e8193d5f9e52358c30c1cef5617b7909c16b;p=kernel.git

vmxnet3: use correct hdr reference when packet is encapsulated

'Commit 72efc4f3621c ("vmxnet3: add geneve and vxlan tunnel offload
support")' added support for encapsulation offload. However, while
preparing inner tso packet, it uses reference to outer ip headers.

This patch fixes this issue by using correct reference for inner
headers.

Fixes: 72efc4f3621c ("vmxnet3: add geneve and vxlan tunnel offload support")
Signed-off-by: Ronak Doshi <doshir@vmware.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/drivers/net/vmxnet3/vmxnet3_drv.c b/drivers/net/vmxnet3/vmxnet3_drv.c
index 3d07ce6cb7065..ca395f9679d04 100644
--- a/drivers/net/vmxnet3/vmxnet3_drv.c
+++ b/drivers/net/vmxnet3/vmxnet3_drv.c
@@ -859,14 +859,29 @@ vmxnet3_parse_hdr(struct sk_buff *skb, struct vmxnet3_tx_queue *tq,
 			 */
 			ctx->l4_offset = skb_checksum_start_offset(skb);
 
-			if (ctx->ipv4) {
-				const struct iphdr *iph = ip_hdr(skb);
+			if (VMXNET3_VERSION_GE_4(adapter) &&
+			    skb->encapsulation) {
+				struct iphdr *iph = inner_ip_hdr(skb);
+
+				if (iph->version == 4) {
+					protocol = iph->protocol;
+				} else {
+					const struct ipv6hdr *ipv6h;
 
-				protocol = iph->protocol;
-			} else if (ctx->ipv6) {
-				const struct ipv6hdr *ipv6h = ipv6_hdr(skb);
+					ipv6h = inner_ipv6_hdr(skb);
+					protocol = ipv6h->nexthdr;
+				}
+			} else {
+				if (ctx->ipv4) {
+					const struct iphdr *iph = ip_hdr(skb);
 
-				protocol = ipv6h->nexthdr;
+					protocol = iph->protocol;
+				} else if (ctx->ipv6) {
+					const struct ipv6hdr *ipv6h;
+
+					ipv6h = ipv6_hdr(skb);
+					protocol = ipv6h->nexthdr;
+				}
 			}
 
 			switch (protocol) {
@@ -946,11 +961,11 @@ vmxnet3_prepare_inner_tso(struct sk_buff *skb,
 	struct tcphdr *tcph = inner_tcp_hdr(skb);
 	struct iphdr *iph = inner_ip_hdr(skb);
 
-	if (ctx->ipv4) {
+	if (iph->version == 4) {
 		iph->check = 0;
 		tcph->check = ~csum_tcpudp_magic(iph->saddr, iph->daddr, 0,
 						 IPPROTO_TCP, 0);
-	} else if (ctx->ipv6) {
+	} else {
 		struct ipv6hdr *iph = inner_ipv6_hdr(skb);
 
 		tcph->check = ~csum_ipv6_magic(&iph->saddr, &iph->daddr, 0,