nfsd_file_is_cached(9)

💅 nfsd_file_is_cached — from the Kernel API Manual, bestie

okay so first of all, welcome to nfsd_file_is_cached(9), a true icon of the kernel API manual and honestly kind of a vibe. sit down, hydrate, let's get into it 🫶

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✨ NAME ✨

nfsd_file_is_cached — literally the question: are there any cached open files for this inode? that's it. that's the function. 💅

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🦋 SYNOPSIS 🦋

bool nfsd_file_is_cached (struct inode *inode );

like, yes, it's a bool. she returns a yes or a no. no in-between, no situationships 🌸

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🎀 ARGUMENTS 🎀

• inode — the inode to check 👀 that's the whole argument. one (1) inode. the subject of the vibe check.

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🔥 DESCRIPTION 🔥

so the lookup matches inodes in all net namespaces, and it's atomic wrt nfsd_file_acquire. no cap — all of them, and it plays nice with nfsd_file_acquire atomically. the way that this function just knows 😭

now the return values, bestie, because this is the part everyone actually asks about:

• true: filecache contains at least one file matching this inode ✅ slay, she found something
• false: filecache contains no files matching this inode 🍓 bestie the cache is empty for this inode, it's giving nothing

periodt. that's the whole description. iconic, honestly.

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👑 SEE ALSO 👑

Kernel file ./fs/nfsd/filecache.c — the source file, iykyk 💖

and now the whole friend group, in order, no one left behind:

• nfsd_file_check_write_error(9)
• nfsd_file_put(9)
• nfsd_file_put_local(9)
• nfsd_file_file(9)
• nfsd_file_dispose_list_delayed(9)
• nfsd_file_net_dispose(9)
• nfsd_file_lru_cb(9)
• nfsd_file_cond_queue(9)
• nfsd_file_queue_for_close(9)
• nfsd_file_close_inode(9)
• nfsd_file_close_inode_sync(9)
• nfsd_file_close_export(9)
• __nfsd_file_cache_purge(9) — yes she has two underscores in front, respect the name 🫶
• nfsd_file_cache_purge(9)
• nfsd_file_acquire_gc(9)
• nfsd_file_acquire(9)
• nfsd_file_acquire_local(9)
• nfsd_file_acquire_opened(9)
• nfsd_file_acquire_dir(9)
• nfsd_fsnotify_recalc_mask(9)

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🌈 and that's the whole page, bestie! this one lives in ./fs/nfsd and the manual is dated October 2026 — put it in your calendar, screenshot it, send it to the group chat ��⭐ bye mwah 💜