smack_fs_context_submount(9)

📦 version 7.3.1, in nixpkgs unstable

💅 smack_fs_context_submount — from the smack(9) kernel API manual, bestie 🎀

okay so picture this: it's a kernel API manual page, manual name smack_fs_context_submount(9), and it is exactly what it says on the tin — well, almost. It's one tiny function in Smack's LSM code, and honestly? she's giving supporting-character energy but she matters. ngl, the whole page is like four lines of actual content and then the world's longest SEE ALSO, and I respect the audacity 💀

🌸 NAME 🌸

smack_fs_context_submount — initialise security data for a filesystem context ✨

like, literally set up the Smack bits when a filesystem context gets a submount. lowkey iconic of her.

🦋 SYNOPSIS 🦋

int smack_fs_context_submount(struct fs_context *fc, struct super_block *reference);

that's the whole signature, no cap 🫶

🧚 ARGUMENTS 🧚

  • fc — the filesystem context. yes, that one. she's the main character here 💖
  • reference — the reference superblock. the blueprint, the vibe-check baseline 🌈

💜 DESCRIPTION 💜

so the entire description is this:

returns 0 on success or -ENOMEM on error.

that's it. that's the whole function. she either slays (0) or she's out of memory (-ENOMEM) 😭 and there is no in-between, periodt.

bestie be warned: this page documents no other return values — so don't go inventing any. 0 or -ENOMEM. those are the rules 🎀

👑 SEE ALSO 👑

okay this is the part where the page goes feral. every single one of these lives in the kernel file ./security/smack/smack_lsm.c — here's the whole fam, and yes, I'm listing all of them because every single one ate 🔥

🍓 helpers & inode/task setup

💅 ptrace, mounts & context

🎀 inode business

🧸 file hooks

💖 creds

🌸 task stuff

🌈 sockets & networking

🫶 IPC (shm, sem, msg queues)

⭐ procattr / selfattr

🦋 keys, audit, secctx, io_uring & the grand finale

and that's the whole page, bestie 🧚 this came at you from ./security/smack, dated October 2026 — so like, shoutout to the future, hope she's thriving 💜✨ go read smack_init(9) ngl, it's the origin story 👑

📦 where this page comes from