nfsd_wait_for_delegreturn(9)

💅 nfsd_wait_for_delegreturn — like, the kernel API manual (section 9) edition 🎀

okay so real talk, this page is from the Kernel API Manual, section 9, and the function is called nfsd_wait_for_delegreturn. bestie, we're going to talk about waiting for delegations to be returned and honestly it's giving patience-is-a-virtue energy ✨

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🌸 NAME 🌸

nfsd_wait_for_delegreturn — literally just: wait for delegations to be returned 🫶

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✨ SYNOPSIS ✨

bool nfsd_wait_for_delegreturn (struct svc_rqst *rqstp , struct inode
*inode );

yes that's the whole signature, no cap. it returns a bool 👑

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🦋 ARGUMENTS 🦋

• rqstp — the RPC transaction that's being executed. like, the whole vibe of the request you're currently running 💫
• inode — the in-core inode of the file we're waiting on. that's the file in question, chillin' in memory 🌸

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💖 DESCRIPTION 💖

so here's the thing — there's a timeout, and it's not just there for aesthetics. the timeout prevents deadlock if all nfsd threads happen to be tied up waiting for returning delegations 😭 like imagine every single thread is standing around waiting and nobody's doing anything — that's the deadlock, and the timeout is the icon that refuses to let that happen. periodt.

Return values:

• true — the delegation was returned 🎉
• false — we timed out waiting for delegreturn 💀

ngl this is important: the deadline is load-bearing. without the timeout, everything stalls forever. so don't go thinking it's optional flair 🙈

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🔥 SEE ALSO 🔥

Kernel file ./fs/nfsd/nfs4state.c, plus a whole friend group of functions:

• nfs4_delegation_exists(9)
• hash_delegation_locked(9)
• revoke_delegation(9)
• nfs4_replay_free_cache(9)
• nfsd4_revoke_states(9)
• nfsd4_revoke_export_states(9)
• nfsd_slot_shrinker_count(9)
• nfsd_slot_shrinker_scan(9)
• nfsd4_put_client(9)
• nfsd_breaker_owns_lease(9)
• nfsd4_deleg_lm_open_conflict(9)
• nfsd4_process_open2(9)
• nfsd4_force_end_grace(9)
• nfs4_preprocess_stateid_op(9)
• nfs4_preprocess_seqid_op(9)
• nfsd4_release_lockowner(9)
• nfsd4_vet_deleg_time(9)
• nfsd4_deleg_getattr_conflict(9)
• nfsd_get_dir_deleg(9)
• nfsd_update_cmtime_attr(9)

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and that's the whole page, bestie 🧚💜 this one lives in ./fs/nfsd, dated October 2026, and yes the man page name is nfsd_wait_for_delegreturn(9) in case you forgot already 😌 slay, go wait on those delegations responsibly ⭐