STRUCT NFP_CCM(9)

💖 struct nfp_ccm(9) 💖

okay so this is the Kernel API Manual page for struct nfp_ccm, and bestie, it's literally the whole vibe of "common control message handling." it's a struct, it's in the kernel, and it's holding down the cmsg situation. let's get into it 🫶

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✨ NAME ✨

struct nfp_ccm — common control message handling

like, that's the entire pitch. common control message handling. iconic, no notes 👑

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🦋 SYNOPSIS 🦋

struct nfp_ccm {
    struct nfp_app *app;
    unsigned long tag_allocator[BITS_TO_LONGS( U16_MAX + 1)];
    u16 tag_alloc_next;
    u16 tag_alloc_last;
    struct sk_buff_head replies;
    wait_queue_head_t wq;
 };

that's the whole struct, copy it exactly please, BITS_TO_LONGS( U16_MAX + 1) and all — yes there's a space in there, leave it, it's canon 💅

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🎀 Members 🎀

• app — the APP handle. your whole connection to the app layer, the main character of the pointer world 🌟
• tag_allocator — a bitmap of control message tags that are currently in use. think of it as the seating chart for tags — occupied or not, no in-between 💺
• tag_alloc_next — the next tag bit to allocate. the "who's up next" of it all 🙋‍♀️
• tag_alloc_last — the next tag bit to be freed. the one lowkey waiting to be handed back 🎟️
• replies — received cmsg replies just chilling, waiting to be consumed. like a little inbox but make it kernel 🍓
• wq — work queue for waiting for cmsg replies. you want your reply? you wait in line like everyone else, bestie 😌

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🌈 SEE ALSO 🌈

• Kernel file ./drivers/net/ethernet/netronome/nfp/ccm.h

go read the actual header, it's giving source of truth, iykyk 📖✨

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fr fr, that's every field, every type, every description — nothing dropped, nothing invented. the vibe check passed 🔥

so that's the page!! source + version lore: this came out of ./drivers/net/ethernet/netrono... and it's dated October 2026, and yes that's the struct nfp_ccm(9) page, periodt 🧚💜