2636 	struct virtio_net_hdr vnet_hdr = { 0 };  in packet_snd()  local
2681 		vnet_hdr_len = sizeof(vnet_hdr);  in packet_snd()
2690 		n = copy_from_iter(&vnet_hdr, vnet_hdr_len, &msg->msg_iter);  in packet_snd()
2694 		if ((vnet_hdr.flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) &&  in packet_snd()
2695 		    (__virtio16_to_cpu(vio_le(), vnet_hdr.csum_start) +  in packet_snd()
2696 		     __virtio16_to_cpu(vio_le(), vnet_hdr.csum_offset) + 2 >  in packet_snd()
2697 		      __virtio16_to_cpu(vio_le(), vnet_hdr.hdr_len)))  in packet_snd()
2698 			vnet_hdr.hdr_len = __cpu_to_virtio16(vio_le(),  in packet_snd()
2699 				 __virtio16_to_cpu(vio_le(), vnet_hdr.csum_start) +  in packet_snd()
2700 				__virtio16_to_cpu(vio_le(), vnet_hdr.csum_offset) + 2);  in packet_snd()
2703 		if (__virtio16_to_cpu(vio_le(), vnet_hdr.hdr_len) > len)  in packet_snd()
2706 		if (vnet_hdr.gso_type != VIRTIO_NET_HDR_GSO_NONE) {  in packet_snd()
2707 			switch (vnet_hdr.gso_type & ~VIRTIO_NET_HDR_GSO_ECN) {  in packet_snd()
2721 			if (vnet_hdr.gso_type & VIRTIO_NET_HDR_GSO_ECN)  in packet_snd()
2724 			if (vnet_hdr.gso_size == 0)  in packet_snd()
2746 			       __virtio16_to_cpu(vio_le(), vnet_hdr.hdr_len),  in packet_snd()
2787 		if (vnet_hdr.flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) {  in packet_snd()
2788 			u16 s = __virtio16_to_cpu(vio_le(), vnet_hdr.csum_start);  in packet_snd()
2789 			u16 o = __virtio16_to_cpu(vio_le(), vnet_hdr.csum_offset);  in packet_snd()
2797 			__virtio16_to_cpu(vio_le(), vnet_hdr.gso_size);  in packet_snd()
3175 		struct virtio_net_hdr vnet_hdr = { 0 };  in packet_recvmsg()  local
3178 		vnet_hdr_len = sizeof(vnet_hdr);  in packet_recvmsg()
3188 			vnet_hdr.hdr_len =  in packet_recvmsg()
3190 			vnet_hdr.gso_size =  in packet_recvmsg()
3193 				vnet_hdr.gso_type = VIRTIO_NET_HDR_GSO_TCPV4;  in packet_recvmsg()
3195 				vnet_hdr.gso_type = VIRTIO_NET_HDR_GSO_TCPV6;  in packet_recvmsg()
3197 				vnet_hdr.gso_type = VIRTIO_NET_HDR_GSO_UDP;  in packet_recvmsg()
3203 				vnet_hdr.gso_type |= VIRTIO_NET_HDR_GSO_ECN;  in packet_recvmsg()
3205 			vnet_hdr.gso_type = VIRTIO_NET_HDR_GSO_NONE;  in packet_recvmsg()
3208 			vnet_hdr.flags = VIRTIO_NET_HDR_F_NEEDS_CSUM;  in packet_recvmsg()
3209 			vnet_hdr.csum_start = __cpu_to_virtio16(vio_le(),  in packet_recvmsg()
3211 			vnet_hdr.csum_offset = __cpu_to_virtio16(vio_le(),  in packet_recvmsg()
3214 			vnet_hdr.flags = VIRTIO_NET_HDR_F_DATA_VALID;  in packet_recvmsg()
3217 		err = memcpy_to_msg(msg, (void *)&vnet_hdr, vnet_hdr_len);  in packet_recvmsg()