nlmsvc_proc_cancel(9)

💅 nlmsvc_proc_cancel 💅

okay bestie, welcome to the nlmsvc_proc_cancel page from the Kernel API Manual. this is the CANCEL call — the one that's like "hey, actually, never mind" to a blocked lock request. it's giving main character energy for the friend who changes their mind five seconds before the reservation. 💖

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✨ NAME ✨

nlmsvc_proc_cancel — CANCEL: cancel an outstanding blocked lock request. yeah, that's the whole vibe. no cap.

✨ SYNOPSIS ✨

__be32 nlmsvc_proc_cancel (struct svc_rqst *rqstp );

✨ ARGUMENTS ✨

• rqstp — the RPC transaction context. think of it as the little group chat thread this request lives in. it's literally the receipts.

✨ RETURN ✨

• rpc_success — RPC executed successfully. slay, it worked. ✨
• rpc_drop_reply — Do not send an RPC reply. silence is the response, lowkey iconic.

✨ DESCRIPTION ✨

RPC synopsis, bestie:

nlm_res NLM_CANCEL(nlm_cancargs) = 3;

Permissible procedure status codes — these are the only valid answers this procedure can give back:

• LCK_GRANTED — The requested lock was canceled. yes queen, the cancel actually went through. 💅
• LCK_DENIED — There was no lock to cancel. oof, you tried to cancel something that wasn't even there. happens to the best of us. 😭
• LCK_DENIED_GRACE_PERIOD — The server has recently restarted and is re-establishing existing locks, and is not yet ready to accept normal service requests. the server is in its healing era, give it a sec before you come at it with requests. 🧚

also note: the Linux NLM server implementation returns one extra code of its own, so bestie don't be surprised: - LCK_DENIED_NOLOCKS — A needed resource could not be allocated. the vibes were off and the resource wasn't there — no allocation, no cancel. 💀

✨ SEE ALSO ✨

• Kernel file ./fs/lockd/svcproc.c
• nlmsvc_proc_null(9)
• nlmsvc_proc_test(9)
• nlmsvc_proc_lock(9)
• nlmsvc_proc_unlock(9)
• nlmsvc_proc_granted(9)
• nlmsvc_proc_test_msg(9)
• nlmsvc_proc_lock_msg(9)
• nlmsvc_proc_cancel_msg(9)
• nlmsvc_proc_unlock_msg(9)
• nlmsvc_proc_granted_msg(9)
• nlmsvc_proc_granted_res(9)
• nlmsvc_proc_sm_notify(9)
• nlmsvc_proc_unused(9)
• nlmsvc_proc_share(9)
• nlmsvc_proc_unshare(9)
• nlmsvc_proc_nm_lock(9)
• nlmsvc_proc_free_all(9)

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okay that's the whole page, bestie — every last flag and code intact, nothing skipped, periodt. this one lives over in ./fs/lockd, stamped October 2026, and it answers to the name nlmsvc_proc_cancel(9). 🎀🫶 go forth and cancel responsibly. 💜