STRUCT OVS_SKB_CB(9)

✨ NAME ✨

okay so bestie, this is struct ovs_skb_cb from the Kernel API Manual, and it is literally OVS data in skb CB. That’s the whole vibe. 🫶

💅 SYNOPSIS 💅

       struct ovs_skb_cb {
           struct vport            *input_vport;
           u16 mru;
           u16 acts_origlen;
           u32 cutlen;
           u32 probability;
           u32 upcall_pid;
        };

🎀 Members 🎀

bestie, here’s the member-by-member tea ☕ — all six, no skips:

• input_vport — the original vport packet came in on. This value is cached when a packet is received by OVS. 💖
• mru — the maximum received fragement size; 0 if the packet is not fragmented. 🦋
• acts_origlen — the netlink size of the flow actions applied to this skb. ✨
• cutlen — the number of bytes in the packet to preserve on output. 🎀
• probability — the sampling probability that was applied to this skb; 0 means no sampling has occurred; U32_MAX means 100% probability. 🔥
• upcall_pid — Netlink socket PID to use for sending this packet to userspace; 0 means "not set" and default per-CPU or per-vport dispatch should be used. 👑

🦋 SEE ALSO 🦋

Kernel file ./net/openvswitch/datapath.h — go peek at the whole squad: struct dp_stats_percpu(9), struct dp_nlsk_pids(9), struct datapath(9), struct dp_upcall_info(9), struct ovs_net(9), enum ovs_pkt_hash_types(9). Periodt. 💅

mwah 💋 — source/version: ./net/openvswitch; date: October 2026; page: struct ovs_skb_cb(9). bye bestie, go slay those skbs! 🌈