nfsd_reset_write_verifier(9)

nfsd_reset_write_verifier(9) — Kernel API Manual 💅

okay so bestie, welcome to the Kernel API Manual entry for this absolute little function. it's giving “tiny but important” energy, and we're gonna go through it together, no cap ✨

💖 NAME 💖

nfsd_reset_write_verifier — Generate a new write verifier

✨ SYNOPSIS ✨

void nfsd_reset_write_verifier (struct nfsd_net *nn );

🎀 ARGUMENTS 🎀

• nn — NFS net namespace

🦋 DESCRIPTION 🦋

so this function updates the ->writeverf field of nn, periodt. that field is holding an opaque cookie, and according to Section 18.32.3 of RFC 8881, it's literally this:

"the client can use to determine whether a server has changed instance state (e.g., server restart) between a call to WRITE and a subsequent call to either WRITE or COMMIT. This cookie MUST be unchanged during a single instance of the NFSv4.1 server and MUST be unique between instances of the NFSv4.1 server."

so yeah, the cookie has main character energy: it MUST stay unchanged during a single instance of the NFSv4.1 server, and it MUST be unique between instances of the NFSv4.1 server. those MUSTs are not decorative, bestie 💀

🌸 SEE ALSO 🌸

• Kernel file ./fs/nfsd/nfssvc.c
• nfsd_nrthreads(9)
• nfsd_copy_write_verifier(9)
• nfsd_destroy_serv(9)
• nfsd_set_nrthreads(9)
• nfsd_svc(9)
• nfsd_dispatch(9)
• nfssvc_decode_voidarg(9)
• nfssvc_encode_voidres(9)

okay bye bestie — this one comes from ./fs/nfsd, dated October 2026, and it's literally nfsd_reset_write_verifier(9) 💜✨