bpf_prog_arena(9)

💜 bpf_prog_arena(9) — like, the kernel API manual, bestie 💜

okay so this is a page from the Kernel API Manual and it's literally about bpf_prog_arena, no cap. it's short, it's sweet, it's giving "small function, big main character energy" ✨ let's get into it 🫶

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🌸 NAME 🌸

bpf_prog_arena — returns the bpf_map of the arena that @prog is referencing 💅 that's it, that's the whole job, and she does it flawlessly

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✨ SYNOPSIS ✨

struct bpf_map * bpf_prog_arena (struct bpf_prog *prog );

like yes, that's the whole signature, copy it exactly bestie, don't be weird about the spacing 😭

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🎀 ARGUMENTS 🎀

• prog — a loaded BPF program 🌈 that's the one and only thing you hand her

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🦋 DESCRIPTION 🦋

okay so here's the tea ☕ — the verifier enforces at most one arena per program, periodt 💀 and it stores that arena in prog->aux->arena. iconic behavior honestly 👑

so what bpf_prog_arena does is: it returns that arena's underlying bpf_map 🔥 that's the whole vibe.

and if prog does not reference an arena? she returns NULL 🙈 no drama, no error, just NULL. vibe check passed, nothing there 💜

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👑 SEE ALSO 👑

• Kernel file ./kernel/bpf/arena.c
• bpf_arena_map_kern_vm_start(9)

go read those too, iykyk 🧚

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ngl this page is tiny but she's still slaying, don't sleep on her 💅

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and that's a wrap bestie!! 🍓 this lil beauty lives under ./kernel/bpf and it's dated October 2026 — the source/version and date, mentioned right here in the sign-off like the cute lil footer it is 🌸💖 bye pookie, go read the arena source 🦋