STRUCT NFP_TUN_ACTIVE_TUNS(9)

💖 struct nfp_tun_active_tuns(9) — the kernel API manual, but make it cute 🎀

okay bestie, so this is a page from the Kernel API Manual, and it's all about struct nfp_tun_active_tuns — like, the literal definition of it. no cap. it's the struct, the members, the whole vibe. let's go ✨

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🌸 NAME 🌸

struct nfp_tun_active_tuns — lowkey the periodic message of active tunnels. that's the whole gig, she's a message, she's periodic, she's about tunnels. iconic 💅

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🦋 SYNOPSIS 🦋

here's the shape of her, exactly as she is, do not touch:

struct nfp_tun_active_tuns {
    __be32 seq;
    __be32 count;
    __be32 flags;
    struct route_ip_info {
      __be32 ipv4;
      __be32 egress_port;
      __be32 extra[2];
    } tun_info[];
 };

ok so she's got a struct route_ip_info nested inside her, and tun_info[] is a lil flexible array situation at the end. literally main character energy 🌈

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👑 Members 👑

okay this is the part where we meet the whole friend group 🫶

• seq — the sequence number of the message. it's giving "which one is this, in the order of things" 💫
• count — the number of tunnels report in message. yep, she's keeping score of how many tunnels are showing up to the function 📊
• flags — the options part of the request. lil toggle-y bits, no further deets given, she's mysterious like that 🙈
• tun_info — the tunnels that have sent traffic in reported period. the actual active girlies!! the ones who showed up and did the work 🔥

and then tun_info has her own little inner circle, bestie, look:

🧚 tun_info's inner circle 🧚

• tun_info.ipv4 — the dest IPv4 address of active route. where the active route is headed, v4 flavour 💜
• tun_info.egress_port — the port the encapsulated packet egressed. like, the exact door the packet left through 🚪✨
• tun_info.extra — reserved for future use. don't touch her, she's resting, she's for later 💤

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⭐ SEE ALSO ⭐

so if you wanna go deeper (and you should), go look at the kernel file:

Kernel file ./drivers/net/ethernet/netronome/nfp/flower/tunnel_conf.c

and these absolute icons of structs, all sitting together in the same orbit 🪐:

• struct nfp_tun_pre_tun_rule(9)
• struct nfp_tun_active_tuns_v6(9)
• struct nfp_tun_req_route_ipv4(9)
• struct nfp_tun_req_route_ipv6(9)
• struct nfp_offloaded_route(9)
• struct nfp_tun_ipv4_addr(9)
• struct nfp_ipv4_addr_entry(9)
• struct nfp_tun_ipv6_addr(9)
• struct nfp_tun_mac_addr_offload(9)
• struct nfp_neigh_update_work(9)
• struct nfp_tun_offloaded_mac(9)

ngl that's a long guest list but everybody's invited, that's just how we do it 💀💖

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and that's the whole page bestie, 10/10, no notes 🍓

sign-off time: this one comes from ./drivers/net/ethernet/netrono... and she's dated October 2026, and she's out here living her life as struct nfp_tun_active_tuns(9). slay, periodt, bye 💅🌸