sel_netnode_sid(9)

💅 sel_netnode_sid (9) — like, the Kernel API Manual, bestie ✨

okay so we're deep in the kernel docs rn, specifically the sel_netnode_sid page from the Kernel API Manual, and honestly? it's a little baddie 🎀

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🌸 NAME 🌸

sel_netnode_sid — Lookup the SID of a network address 👑 no cap, that's literally the whole job

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✨ SYNOPSIS ✨

int sel_netnode_sid (const void *addr , u16 family , u32 *sid );

like yes, that's the whole signature, don't @ me 🫶

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🦋 ARGUMENTS 🦋

• addr — the IP address, the main character of this lil function fr
• family — the address family, iykyk 🌈
• sid — node SID, that's the output bestie 💖

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💜 DESCRIPTION 💜

okay so here's the vibe: this function determines the SID of a network address using the fastest method possible. ⚡ highkey efficient, we love to see it.

here's how it goes down:

1. First the address table is queried 👀
2. but if an entry can't be found, then the policy is queried 🧚
3. and the result is added to the table to speedup future queries 🔥 self-improving queen behaviour honestly

Returns zero on success, negative values on failure. 😭 that's the whole return contract, no notes.

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🌟 SEE ALSO 🌟

Kernel file ./security/selinux/netnode.c and its whole friend group 💅:

• sel_netnode_hashfn_ipv4(9)
• sel_netnode_hashfn_ipv6(9)
• sel_netnode_find(9)
• sel_netnode_insert(9)
• sel_netnode_sid_slow(9)
• sel_netnode_flush(9)

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💀 quick vibe check: sel_netnode_sid_slow(9) is right there in the see-also list, so yes, there IS a slow version, and yes, this page is the fast one. slay.

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that's the whole page bestie, mwah 💋

sign-off szn 🎀 — this cutie lives under ./security/selinux, dated October 2026, per the Kernel API Manual. periodt. 🌈✨