STRUCT NFP_BPF_MAP(9)

💖 NAME 💖

okay bestie, welcome to the struct nfp_bpf_map(9) page from the Kernel API Manual — it's literally the private per-map data attached to BPF maps for offload ✨

✨ SYNOPSIS ✨

struct nfp_bpf_map {
    struct bpf_offloaded_map *offmap;
    struct nfp_app_bpf *bpf;
    u32 tid;
    spinlock_t cache_lock;
    u32 cache_blockers;
    u32 cache_gen;
    u64 cache_to;
    struct sk_buff *cache;
    struct list_head l;
    struct nfp_bpf_map_word use_map[];
};

🫶 Members 🫶

the whole squad, one by one 💅

• offmap — pointer to the offloaded BPF map, no cap
• bpf — back pointer to the bpf app private structure, it's giving "remember where you came from"
• tid — table id identifying the map on datapath 👑
• cache_lock — protects cache_blockers, cache_to, and cache; do not touch without it fr fr
• cache_blockers — number of ops in flight which block caching 🚧
• cache_gen — counter incremented by every blocker on exit, iconic little bookkeeping moment
• cache_to — time when the cache will no longer be valid (ns) ⏳
• cache — skb with cached response, the main character of the cache situation
• l — link on the nfp_app_bpf->map_list list 🔗
• use_map — map of how the value is used (in 4B chunks), lowkey the most mysterious member and we respect that 🧚

🌈 SEE ALSO 🌈

go read these next, bestie, iykyk:

• Kernel file ./drivers/net/ethernet/netronome/nfp/bpf/main.h
• struct nfp_app_bpf(9)
• struct nfp_bpf_reg_state(9)
• struct nfp_insn_meta(9)
• struct nfp_bpf_subprog_info(9)
• struct nfp_prog(9)
• struct nfp_bpf_vnic(9)

and that's the page 💖 cute little sign-off: the source/version line was ./drivers/net/ethernet/netrono... and the date was October 2026 — so yeah, October 2026 energy, slay 🎀✨