gfs2_permission(9)

📦 version 7.3.1, in nixpkgs unstable

✨ gfs2_permission ✨

okay bestie, welcome to the gfs2_permission page 💅 this one lives in the Kernel API Manual, and ngl the NAME line is a little mysterious — it's literally just gfs2_permission with no description after the dash. iconic minimalist behavior, we respect it 🎀

🌸 SYNOPSIS 🌸

int gfs2_permission (struct mnt_idmap *idmap , struct inode *inode , int
mask );

like, that's the whole vibe. one function, three args, int on the way out ✨

🦋 ARGUMENTS 🦋

  • idmap — the idmap of the mount that the inode was found from 🫶 (iykyk, it's the mapping context for the mount you scooped this inode out of)
  • inode — the inode itself. the main character, literally 👑
  • mask — the mask to be tested 🧪 that's what we're checking permissions against

💜 DESCRIPTION 💜

so here's the situation, bestie: this can be called from the VFS directly, or from inside GFS2 while the inode is already locked 🔒 and because of that double-entry energy, we do a lil vibe check first — we look to see if the glock is already locked, and we only lock the glock if it hasn't already been done 😌 no double-locking, no drama, we're not about that life 💅

lowkey the whole function is that check. it's giving "responsible friend who texts 'you up?' before just showing up" 🎀

⭐ RETURN ⭐

errno — that's it, that's the return value 🌈

🧚 SEE ALSO 🧚

okay so this is a long list and we're not skipping a single one, because every one of these is part of the family 🫶 they all live in the kernel file ./fs/gfs2/inode.c:

like, go read them, they're all slaying in their own way 🔥

okay and one tiny heads up before you go: this whole page comes from ./fs/gfs2 and it's dated October 2026 under the Kernel API Manual 💖 that's the version and source, just so you have receipts. mwah, go check those glocks bestie 💋🌸
📦 where this page comes from