rpcauth_checkverf(9)

💖 rpcauth_checkverf(9) — Validate verifier in RPC Reply header 💖

okay so bestie, this is the rpcauth_checkverf(9) kernel API page. The manual name is literally right there in the title, and the whole lore is: we're validating the verifier in an RPC Reply header. main character energy for a tiny return-value function, honestly. ✨

💅 NAME 💅

rpcauth_checkverf — Validate verifier in RPC Reply header

✨ SYNOPSIS ✨

int rpcauth_checkverf (struct rpc_task *task , struct xdr_stream *xdr );

🎀 ARGUMENTS 🎀

• task — controlling RPC task
• xdr — xdr_stream containing RPC Reply header

🦋 DESCRIPTION 🦋

so here's the tea on the return values, bestie — this is the whole vibe check:

• 0 — Verifier is valid. xdr now points past the verifier. slay. 💖
• -EIO — Verifier is corrupted or message ended early. not the vibe. 😭
• -EACCES — Verifier is intact but not valid. it's giving "looks fine, is not fine." 🙈
• -EPROTONOSUPPORT — Server does not support the requested auth type. rude, but okay. 💀

⚠️ Major caveat: when a negative errno is returned, xdr is left in an undefined state. no cap, it is literally undefined — do not trust the little guy. periodt. 🫶

🌸 SEE ALSO 🌸

go read these next, bestie — it's giving "required reading for the group chat":

• Kernel file ./net/sunrpc/auth.c
• rpcauth_get_pseudoflavor(9)
• rpcauth_get_gssinfo(9)
• rpcauth_marshcred(9)
• rpcauth_wrap_req_encode(9)
• rpcauth_wrap_req(9)
• rpcauth_unwrap_resp_decode(9)
• rpcauth_unwrap_resp(9)

— xoxo, your source/version ./net/sunrpc bestie, dated October 2026 💖🎀