mtype_del_cidr(9)

✨ NAME ✨

Okay bestie, meet mtype_del_cidr(9) from the Kernel API Manual 🫶. Its whole vibe is Remove CIDR entry and maintain array integrity. Literally that’s the job — no cap 💅. Think of it as the cleanup bestie that keeps the array looking cute and staying contiguous after a CIDR entry dips out.

💫 SYNOPSIS 💫

void mtype_del_cidr (struct ip_set *set , struct htype *h , u8 cidr , u8
n );

🎀 ARGUMENTS 🎀

• set — Pointer to the ip_set 🫶 yes, that ip_set.
• h — Pointer to the htype.
• cidr — The CIDR prefix length.
• n — The index of the net_prefix array to remove cidr from.

🔥 DESCRIPTION 🔥

If the CIDR entry count falls to 0, this function performs a "shift-left" operation on all following elements 😤. That’s the whole point: it ensures that the array remains contiguous and maintains its descending order by CIDR. Iconic behavior, honestly ✨. The vacated slot at the end of the array is zeroed out (cidr=0, count=0) — not me making it empty and tidy, it’s literally in the spec 💀✨.

bestie, this is the “keep the array cute and contiguous” era 💅

🌈 SEE ALSO 🌈

• Kernel file ./net/netfilter/ipset/ip_set_hash_gen.h
• struct net_prefix(9)
• struct net_prefixes(9)
• mtype_add_cidr(9)

— xoxo, sourced from ./net/netfilter/ipset, dated October 2026 💖🎀