nla_policy_len(9)

💅 nla_policy_len(9) — Kernel API Manual, bestie edition ✨

🌸 NAME 🌸

nla_policy_len — determine the max. length of a policy 🫶

✨ SYNOPSIS ✨

int nla_policy_len (const struct nla_policy *p , int n );

🎀 ARGUMENTS 🎀

• p — the policy you're working with, bestie 💖
• n — the number of policies 🔢

🦋 DESCRIPTION 🦋

Okay so this one determines the max. length of the policy 👑. It's currently used to allocate Netlink buffers roughly the size of the actual message — like, matching the real message's vibe instead of just guessing wildly ✨.

It returns 0 on success, or a negative error code if things go sideways 😭. That's the tea, fr fr.

🌈 SEE ALSO 🌈

Kernel file ./lib/nlattr.c — plus the whole friend group:

• __nla_validate(9)
• __nla_parse(9)
• nla_find(9)
• nla_strscpy(9)
• nla_strdup(9)
• nla_memcpy(9)
• nla_memcmp(9)
• nla_strcmp(9)
• __nla_reserve(9)
• __nla_reserve_64bit(9)
• __nla_reserve_nohdr(9)
• nla_reserve(9)
• nla_reserve_64bit(9)
• nla_reserve_nohdr(9)
• __nla_put(9)
• __nla_put_64bit(9)
• __nla_put_nohdr(9)
• nla_put(9)
• nla_put_64bit(9)
• nla_put_nohdr(9)
• nla_append(9)

This page lives in ./lib, is dated October 2026, and it's the nla_policy_len(9) manual page — periodt 💅✨