__security_genfs_sid(9)

📦 version 7.3.1, in nixpkgs unstable

okay so we're in the Kernel API Manual, and this page is all about __security_genfs_sid(9) — yes, the tiny helper with main character energy 💅✨

🌸 NAME 🌸

__security_genfs_sid — the helper that obtains a SID for a file in a filesystem. That's the whole name vibe, periodt 🎀

✨ SYNOPSIS ✨

int __security_genfs_sid (struct selinux_policy *policy , const char
       *fstype , const char *path , u16 orig_sclass , u32 *sid );

🦋 ARGUMENTS 🦋

  • policy — policy. That's literally it, bestie — no extra lore here 🫶
  • fstype — filesystem type
  • path — path from root of mount
  • orig_sclass — file security class
  • sid — SID for path

💖 DESCRIPTION 💖

okay so what does this actually do? It obtains a SID to use for a file in a filesystem that cannot support xattr or use a fixed labeling behavior like transition SIDs or task SIDs. That's the tea 🍓

⚠️ WARNING: this function may return -ESTALE, indicating that the caller must retry the operation after re-acquiring the policy pointer! Do not ignore this, bestie — it's literally a warning for a reason 😭💀

🔗 SEE ALSO 🔗

Kernel file: ./security/selinux/ss/services.c — yes, that's the spot. Then the whole linked squad, every single one, no cap:

okay that's the page, bestie 🫶💖. Source/version: ./security/selinux/ss; date: October 2026; title: __security_genfs_sid(9). Now go retry after re-acquiring that policy pointer, mwah 💅✨

📦 where this page comes from