By using this " bpf_skb_load_bytes_relative()" helper function we can directly
retrieve the Network header data fields, so we no need to check for L2-header
VLAN presence.
Thanks,
Madhuker.
-----Original Message-----
From: Stephen Hemminger <step...@networkplumber.org>
Sent: 05 January 2024 02:11
To: Madhuker Mythri <madhuker.myt...@oracle.com>
Cc: ferruh.yi...@amd.com; dev@dpdk.org
Subject: [External] : Re: [PATCH] net/tap: Modified TAP BPF program as per the
new Kernel-version upgrade requirements.
On Thu, 4 Jan 2024 22:57:56 +0530
madhuker.myt...@oracle.com wrote:
> - /* Get correct proto for 802.1ad */
> - if (skb->vlan_present && skb->vlan_proto == htons(ETH_P_8021AD)) {
> - if (data + ETH_ALEN * 2 + sizeof(struct vlan_hdr) +
> - sizeof(proto) > data_end)
> - return TC_ACT_OK;
> - proto = *(__u16 *)(data + ETH_ALEN * 2 +
> - sizeof(struct vlan_hdr));
> - off += sizeof(struct vlan_hdr);
> - }
Your version loses VLAN support?
