netlbl_cache_add(9)

📦 version 7.3.1, in nixpkgs unstable

💖 netlbl_cache_add(9) 💖

okay so this is netlbl_cache_add(9) from the Kernel API Manual — yes bestie, we're in kernel-doc territory and it's giving very "I read the source for fun" energy 🧚✨

✨ NAME ✨

netlbl_cache_add — add an entry to a NetLabel protocol cache 🎀

🌸 SYNOPSIS 🌸

int netlbl_cache_add (const struct sk_buff *skb , u16 family ,
                      const struct netlbl_lsm_secattr *secattr );

like literally that's the whole signature, no cap 💅

🦋 ARGUMENTS 🦋

  • skb — the packet 📦 (the actual sk_buff we're talking about here)
  • family — the family 🏠 (that's the address family arg, exactly as named)
  • secattr — the packet's security attributes 🔐 (a const struct netlbl_lsm_secattr *)

👑 DESCRIPTION 👑

so what this does 👏 is it takes the LSM security attributes for the given packet and adds them to the underlying NetLabel protocol's label mapping cache. that's it, that's the whole vibe 🫶

return value check, bestie, do not skip:

  • returns zero on success ⭐
  • returns negative values on error 💀
ngl, always check the return. zero is the slay outcome, negatives are the "we have a problem" outcome 😭

🔥 SEE ALSO 🔥

Kernel file ./net/netlabel/netlabel_kapi.c and honestly the whole NetLabel friend group 🫶:

and that's the page bestie 🌈 this gem lives in ./net/netlabel, dated October 2026, and it's filed under netlbl_cache_add(9) — go forth and cache those labels 💜🎀✨

📦 where this page comes from