nfsd_nl_fh_key_set(9)

🌸 nfsd_nl_fh_key_set(9) 🌸

hiii bestie! this page is from the Kernel API Manual, and the main character is literally nfsd_nl_fh_key_set(9) 🫶. it's a tiny helper with big “read the rules first” energy, so let's go 💅.

💅 NAME 💅

nfsd_nl_fh_key_set — helper to copy fh_key from userspace ✨

🦋 SYNOPSIS 🦋

int nfsd_nl_fh_key_set (const struct nlattr *attr , struct nfsd_net *nn
);

🎀 ARGUMENTS 🎀

• attr — the nlattr NFSD_A_SERVER_FH_KEY 👑
• nn — the nfsd_net 🦋

🔥 DESCRIPTION 🔥

okay so the rules, fr fr: callers should hold nfsd_mutex 🔒. it returns 0 on success or a negative errno 😭.

callers must ensure the server is shut down (sv_nrthreads == 0) — userspace documentation asserts the key may only be set when the server is not running. periodt. no sneaky running-server key-setting, bestie 🚫👑

💜 SEE ALSO 💜

Kernel file ./fs/nfsd/nfsctl.c is right here, and these besties are linked too:

• nfsd_nl_rpc_status_get_dumpit(9)
• nfsd_nl_threads_set_doit(9)
• nfsd_nl_threads_get_doit(9)
• nfsd_nl_version_set_doit(9)
• nfsd_nl_version_get_doit(9)
• nfsd_nl_validate_listeners(9)
• nfsd_nl_listener_set_doit(9)
• nfsd_nl_listener_get_doit(9)
• nfsd_nl_pool_mode_set_doit(9)
• nfsd_nl_pool_mode_get_doit(9)
• nfsd_nl_cache_flush_doit(9)
• nfsd_nl_server_stats_get_dumpit(9)
• nfsd_nl_unlock_ip_doit(9)
• nfsd_nl_unlock_filesystem_doit(9)
• nfsd_nl_unlock_export_doit(9)
• nfsd_net_init(9)
• nfsd_net_pre_exit(9)
• nfsd_net_exit(9)

xoxo, bestie 💖 — source ./fs/nfsd, October 2026, page nfsd_nl_fh_key_set(9). slay and goodbye! 🎀✨