vfs_parse_fs_param(9)

📦 version 7.3.1, in nixpkgs unstable

✨ vfs_parse_fs_param — Kernel API Manual vibes ✨

okay so bestie, you found the vfs_parse_fs_param(9) page and honestly? good for you. this is the manual for one tiny but iconic kernel function. let's get into it 💅

🌸 NAME 🌸

vfs_parse_fs_param — add a single parameter to a superblock config. that's it, that's the whole name, and it ate 💖

🎀 SYNOPSIS 🎀

int vfs_parse_fs_param (struct fs_context *fc , struct fs_parameter
*param );

like, look at that signature. two pointers, one int return. simple, clean, main character energy 👑

🦋 ARGUMENTS 🦋

  • fc — the filesystem context you're modifying. this is the thing getting set up, and you're about to hand it a little treat ✨
  • param — the parameter itself. literally the option in question 🫶

🌈 DESCRIPTION 🌈

okay so here's what's going down: a single mount option, in string form, gets applied to the filesystem context being set up. one option at a time, no cap 💅

certain standard options (for example "ro") are translated into flag bits without ever going to the filesystem. like, they get handled right there, no forwarding address needed. iconic behaviour honestly 🔥

the active security module is allowed to observe and poach options 👀 yes, poach. that's the actual word. it can watch what's coming through and snatch things up for itself. no further comment 😭

any other options are passed over to the filesystem to parse. so at that point it's the filesystem's problem, bestie, not this function's 🌸

this may be called multiple times for a context. so yeah, repeat calls are a whole thing, totally allowed, go off 🔁

return value time: returns 0 on success and a negative error code on failure. and in the event of failure, supplementary error information may have been set — so like, there might be extra tea in the error info, go look at it 💀

🧚 SEE ALSO 🧚

kernel file ./fs/fs_context.c plus the whole friend group:

squad goals, fr fr 💜

⭐ and that's the page!! brought to you by ./fs, dated October 2026, version vfs_parse_fs_param(9) — ty for reading bestie, go parse some params responsibly 🎀💖

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