nfs41_test_stateid(9)

💅 nfs41_test_stateid(9) — a Kernel API Manual moment

okay so bestie, welcome to nfs41_test_stateid, a page straight out of the Kernel API Manual. it's short, it's sweet, it does exactly one thing, and honestly? iconic behavior. let's get into it 🫶

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✨ NAME ✨

nfs41_test_stateid — perform a TEST_STATEID operation

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🦋 SYNOPSIS 🦋

int nfs41_test_stateid (struct nfs_server *server , const nfs4_stateid
*stateid , const struct cred *cred );

like, that's the whole signature. no cap. 📝

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🎀 ARGUMENTS 🎀

• server — the server / transport you're doing the operation on. it's giving "where the vibes happen" ✨
• stateid — the state ID you want to test. yes, that's the whole point, we love a self-aware parameter 💅
• cred — the credential. gotta bring your ID to the function, fr fr 🔑

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🌸 DESCRIPTION 🌸

so here's the tea: it returns NFS_OK if the server recognizes that stateid is valid. slay. 💖

otherwise, you get a negative NFS4ERR value back — that happens if the operation failed, or if the state ID is just not currently valid. 😭 lowkey both roads lead to the same negative number, and that's on purpose.

ngl, remember: negative return = not good. either the op itself fell over or the state ID was a flop. don't @ me, that's literally the manpage.

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👑 SEE ALSO 👑

Kernel file ./fs/nfs/nfs4proc.c and its little friend group:

• nfs41_check_expired_locks(9)
• nfs41_check_open_stateid(9)
• nfs4_proc_get_rootfh(9)
• nfs4_proc_setclientid(9)
• nfs4_proc_setclientid_confirm(9)
• nfs4_proc_get_locations(9)
• nfs4_proc_fsid_present(9)
• nfs4_test_session_trunk(9)
• nfs41_free_stateid(9)

go read them all, i'll wait. 🌈

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and that's the whole page, bestie. this one lives in ./fs/nfs and it's dated October 2026 — so yeah, mark your calendar, save it to your notes app, screenshot it, whatever. mwah 💜🎀✨