STRUCT NFP_FL_CT_FLOW_ENTRY(9)

📦 version 7.3.1, in nixpkgs unstable

💖 struct nfp_fl_ct_flow_entry(9) 💖

okay so this is a Kernel API Manual page, bestie — it's literally the struct nfp_fl_ct_flow_entry, and it's the lil container that holds all your conntrack flow info. it's giving "small struct, huge responsibilities" and honestly? we stan. 🫶

✨ NAME ✨

struct nfp_fl_ct_flow_entry — the flow entry that's carrying around all your conntrack flow information 💅

🌸 SYNOPSIS 🌸

struct nfp_fl_ct_flow_entry {
    unsigned long cookie;
    struct list_head list_node;
    u32 chain_index;
    u32 goto_chain_index;
    struct net_device *netdev;
    struct nfp_fl_ct_zone_entry *zt;
    struct list_head children;
    struct flow_rule *rule;
    struct flow_stats stats;
    struct nfp_fl_nft_tc_merge *prev_m_entries[NFP_MAX_RECIRC_CT_ZONES -
1];
    u8 num_prev_m_entries;
    u8 tun_offset;
    u8 flags;
    u8 type;
};

no cap, look at her. the prev_m_entries array is so long it had to wrap a line and it did NOT care. iconic behavior. 👑

🎀 Members 🎀

  • cookie — the flow cookie 🍪. it's the same as the original TC flow, and it's used as the key. literally the main character of the identity department.
  • list_node — used by the list. that's it, that's the whole vibe. it's a struct list_head doing list things.
  • chain_index — chain index of the original flow 🔗.
  • goto_chain_index — the goto chain index of the flow. yes it's different from chain_index, don't @ me.
  • netdev — the net_device structure. the actual network device, right there.
  • zt — a reference to the zone table this whole thing belongs to 🗂️.
  • children — list of tc_merge flows that this flow forms part of. found family fr fr 💖.
  • rule — reference to the original TC flow rule.
  • stats — used to cache stats for updating 📊. it's holding your numbers so they're ready when you need 'em.
  • prev_m_entries — array of ALL previous nft_tc_merge entries. all of them. every single one. it's NFP_MAX_RECIRC_CT_ZONES - 1 wide and proud of it 🦋.
  • num_prev_m_entries — the number of all those previous nft_tc_merge entries. someone's gotta keep count.
  • tun_offset — used to indicate the tunnel action offset in the action list 🕳️✨
  • flags — used to indicate a flow flag like NAT, which is used by merge. flutter that flag, girl 🚩
  • type — the type of ct-entry, straight from enum ct_entry_type.
lowkey important: cookie is the key, and prev_m_entries is sized NFP_MAX_RECIRC_CT_ZONES - 1 — keep both exactly as-is, bestie, no editing the array size, i'm begging 🙈

🌈 SEE ALSO 🌈

like, go read the whole friend group. they all link up. iykyk 🤝

and that's the page!! 🎉 brought to you by the source ./drivers/net/ethernet/netrono... (yes it's truncated in the original, i'm not touching it, it's fragile 💀) and dated October 2026 ⭐ — mwah, go forth and handle your conntrack flows, bestie 💜🧚‍♀️

📦 where this page comes from