STRUCT NFP_QDISC(9)

✨ struct nfp_qdisc 💅 (Kernel API Manual energy, bestie)

okay so this is the whole entire struct nfp_qdisc — it's literally the tracked TC Qdisc, like the kernel's little receipt for a qdisc it's keeping an eye on. It lives in the Kernel API Manual, and ngl it's giving "very demure, very mindful bookkeeping" 🎀

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🌸 NAME 🌸

struct nfp_qdisc — tracked TC Qdisc. That's it, that's the whole vibe. She tracks, she qdiscs, she slays ✨

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🦋 SYNOPSIS 🦋

struct nfp_qdisc {
    struct net_device *netdev;
    enum nfp_qdisc_type type;
    u32 handle;
    u32 parent_handle;
    unsigned int use_cnt;
    unsigned int num_children;
    struct nfp_qdisc **children;
    bool params_ok;
    bool offload_mark;
    bool offloaded;
    union {
      struct {
        struct nfp_alink_stats stats;
        struct nfp_alink_stats prev_stats;
      } mq;
      struct {
        unsigned int num_bands;
        struct {
          bool ecn;
          u32 threshold;
          struct nfp_alink_stats stats;
          struct nfp_alink_stats prev_stats;
          struct nfp_alink_xstats xstats;
          struct nfp_alink_xstats prev_xstats;
        } band[MAX_DPs];
      } red;
    };
 };

like look at her. nested unions, arrays of bands, MAX_DPs just vibing there at the end of the band array. icon behavior fr fr 👑

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💖 Members 💖

okay bestie let's go through every single field, no skipping, no cap:

• netdev — the netdev on which this Qdisc was created. her home address basically 🏠
• type — the Qdisc type. which flavor of qdisc she is.
• handle — the handle of this Qdisc.
• parent_handle — the handle of the parent. ⚠️ fair warning: this is unreliable if the Qdisc was grafted — so like, don't trust her after a glow-up, she's been moved around 😭
• use_cnt — number of attachment points in the hierarchy. how many places are holding onto her.
• num_children — the current size of the children array.
• children — pointers to children. her little offspring pointers 🫶
• params_ok — parameters of this Qdisc are OK for offload. the vibe check result, basically.
• offload_mark — offload refresh state — selected for offload. lowkey a "you're on the list" situation.
• offloaded — the Qdisc is currently offloaded to the HW. she's out there, in the hardware, living her best life 🔥
• {unnamed_union} — anonymous. no name, just mystery 🕵️‍♀️
• mq — MQ Qdisc specific parameters and state.
• mq.stats — current stats of the MQ Qdisc.
• mq.prev_stats — previously reported mq.stats.
• red — RED Qdisc specific parameters and state.
• red.num_bands — number of valid entries in the red.band table.
• red.band — per-band array of RED instances.
• red.band.ecn — ECN marking is enabled (rather than drop). mark, don't drop, periodt ✨
• red.band.threshold — the ECN marking threshold.
• red.band.stats — current stats of the RED Qdisc.
• red.band.prev_stats — previously reported red.stats.
• red.band.xstats — extended stats for RED — current.
• red.band.prev_xstats — extended stats for RED — previously reported. yes she keeps receipts of her receipts 💀

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🌈 SEE ALSO 🌈

• Kernel file ./drivers/net/ethernet/netronome/nfp/abm/main.h — that's where she actually lives, go say hi 🧚
• struct nfp_abm(9)
• struct nfp_alink_stats(9)
• struct nfp_alink_xstats(9)
• struct nfp_abm_link(9)

the whole friend group honestly. go read all of them, iykyk 💜

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okay that's the page!! no notes, she ate 💅

kiss kiss, this was struct nfp_qdisc(9) from the Kernel API Manual, coming at you from ./drivers/net/ethernet/netrono... (yes it got cut off bestie, that's literally how it's printed) and dated October 2026 — see u in the next man page, mwah 🍓