nfs_set_verifier(9)

💅 nfs_set_verifier — a kernel API manual, but make it make sense

okay so bestie, welcome to nfs_set_verifier from the Kernel API Manual ✨ this one's a tiny little function in the NFS filesystem code and it's genuinely doing the most important lowkey job: it stashes a parent directory verifier inside a dentry. that's it. that's the whole vibe. but like, it matters, so pay attention 🎀

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🌸 NAME 🌸

nfs_set_verifier — save a parent directory verifier in the dentry 🫶

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✨ SYNOPSIS ✨

void nfs_set_verifier (struct dentry *dentry , unsigned long verf );

like literally that's it, two args, returns void, no drama 💅

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🦋 ARGUMENTS 🦋

• dentry — pointer to dentry 👑 this is the lucky little dentry that's getting the verifier
• verf — verifier to save 🍓 the actual value going in

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💖 DESCRIPTION 💖

okay so here's the tea: it saves the parent directory verifier in dentry. simple. iconic. no notes.

and then — this is the part where it gets interesting — if the inode has a delegation, we also tag the dentry as having been revalidated while holding a delegation. why?? so that we know we don't have to look it up again after a directory change 🧠✨ like, we already did the work, bestie, we're not doing it twice. main character energy fr fr.

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🌈 SEE ALSO 🌈

• Kernel file ./fs/nfs/dir.c
• nfs_force_lookup_revalidate(9)
• nfs_verify_change_attribute(9)
• nfs_clear_verifier_delegated(9)

go read those too, they're all in the same little NFS friend group 💜

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okay and finally, the lil sign-off moment 🎀 this one comes from ./fs/nfs, dated October 2026, and it's filed under nfs_set_verifier(9) in the Kernel API Manual. slay. periodt. 💅✨