nlm_fopen(9)

✨ nlm_fopen(9) ✨

okay so bestie, we're in the Kernel API Manual today and the star of the show is nlm_fopen — yes it's giving kernel-internals realness but stay with me, it's literally just "open an NFSD file" 💅

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🎀 NAME 🎀

nlm_fopen — open an NFSD file 🦋

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🌸 SYNOPSIS 🌸

int nlm_fopen (struct svc_rqst *rqstp , struct nfs_fh *f , struct file
**filp , int flags );

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💖 ARGUMENTS 💖

• rqstp — the NLM RPC procedure execution context, aka the whole vibe/environment this call is happening inside 🫶
• f — the NFS file handle that you want opened, like the little ID card for the file 👑
• filp — OUT: an opened struct file — this is where the opened file lands, so it's an output param, not something you bring to the party 🙈
• flags — the POSIX open flags to use, the actual "how do you want it opened" instructions ⭐

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🔥 DESCRIPTION 🔥

so here's the tea: nlm_fopen holds the dentry reference until nlm_fclose releases it. no cap, that's the whole deal — it grabs the reference and keeps it, and nlm_fclose is the one who lets it go. don't be out here releasing it yourself, iykyk 😭

it returns zero on success or a negative errno value if the file cannot be opened — so if you see a negative number, that's the file not cooperating, fr fr 💀

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🌈 SEE ALSO 🌈

• Kernel file ./fs/nfsd/lockd.c
• nlm_fclose(9) 🧚

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so yeah, that's the whole page, bestie — go forth and open those NFSD files responsibly 💜 periodt.

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this lil gem comes to you straight from ./fs/nfsd, dated October 2026, page nlm_fopen(9) — mwah, stay slay ✨🎀