bpf_prog_ar...lete_safe_at(9)

🎀 NAME 🎀

bpf_prog_ar...lete_safe_at — okay so this one replaces the program sitting at the index you pass in, inside the program array, with a dummy no-op program. Like, it ghosts the real program and puts a vibe-only stand-in in its place 💅 (this page lives in the Kernel API Manual, bestie, kernel internals edition ✨)

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✨ SYNOPSIS ✨

int bpf_prog_array_delete_safe_at (struct bpf_prog_array *array , int index );

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🫶 ARGUMENTS 🫶

• array — a bpf_prog_array. That's the array we're messing with, periodt.
• index — the index of the program you want to replace. Which program? That one. The one at this index 👑

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🌸 DESCRIPTION 🌸

So when it's figuring out where the program to replace actually lives, it skips over dummy programs — by just... not counting them 😌. Lowkey the whole trick. They don't count, so they don't shift the position math. Iconic behavior honestly.

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💖 RETURN 💖

• 0 — Success 🎉 slay, it worked
• -EINVAL — Invalid index value. It literally must be a non-negative integer, no cap 🚩
• -ENOENT — Index out of range 😭 you went too far bestie

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🦋 SEE ALSO 🦋

• Kernel file ./kernel/bpf/core.c
• ___bpf_prog_run(9)
• bpf_prog_select_runtime(9)
• bpf_prog_array_update_at(9)

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and that's the whole page, bestie 🧚💜 this lil masterpiece came from the ./kernel/bpf source tree and it's dated October 2026 — go forth and replace programs safely, mwah 💋🎀