nfs4_delegat...ush_on_close(9)

💅 nfs4_delegat...ush_on_close(9) 💅

okay so this is a page from the Kernel API Manual — yes, the Kernel API Manual, we're in the big leagues now bestie 🎀 — and it's all about one very specific little check.

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✨ NAME ✨

nfs4_delegation_flush_on_close — the function that checks whether we absolutely must flush the file on close 😤

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🦋 SYNOPSIS 🦋

bool nfs4_delegation_flush_on_close (const struct inode *inode );

literally returns a bool. that's it. that's the whole vibe check 💫

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🌸 ARGUMENTS 🌸

• inode — the inode we're checking, bestie. the thing under inspection. the main character of this function 🫶

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👑 DESCRIPTION 👑

so here's the deal: this function peeks at the number of outstanding writes on the file, and compares that against the delegation's 'space_limit' field — yep, that's the exact field name, no cap 💅 — all to figure out whether the spec requires us to flush the file on close.

think of it as the "do we gotta flush or can we chill" check ✨

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💜 SEE ALSO 💜

• Kernel file ./fs/nfs/delegation.c
• nfs_mark_delegation_referenced(9)
• nfs4_have_delegation(9)
• nfs_inode_reclaim_delegation(9)
• nfs_inode_set_delegation(9)
• nfs_client_return_marked_delegations(9)
• nfs_inode_evict_delegation(9)
• nfs4_inode_return_delegation(9)
• nfs4_inode_set_return_delegation_on_close(9)
• nfs4_inode_return_delegation_on_close(9)
• nfs4_inode_make_writeable(9)
• nfs_expire_all_delegations(9)
• nfs_server_return_all_delegations(9)
• nfs_remove_bad_delegation(9)
• nfs_expire_unreferenced_delegations(9)
• nfs_async_inode_return_delegation(9)
• nfs_delegation_find_inode(9)
• nfs_delegation_mark_reclaim(9)
• nfs_delegation_reap_unclaimed(9)
• nfs_mark_test_expired_all_delegations(9)
• nfs_test_expired_all_delegations(9)
• nfs_reap_expired_delegations(9)
• nfs_delegations_present(9)
• nfs4_refresh_delegation_stateid(9)
• nfs4_copy_delegation_stateid(9)

like, that's the whole delegation friend group fr fr 😭💀 go read them all, they're iconic.

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and that's the tea, bestie 🍓 this page lives in ./fs/nfs, dated October 2026, and it answers to the name nfs4_delegat...ush_on_close(9) — yes the name is literally abbreviated, don't come for me, that's just how it's printed 💀💖