xdr_set_scratch_buffer(9)

✨ xdr_set_scratch_buffer ✨

okay bestie, welcome to section 9 of the Kernel API Manual — yes we're in kernel-land, yes it's giving big-brain energy, and yes this one's actually short and sweet 🎀

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💖 NAME 💖

xdr_set_scratch_buffer — attach a scratch buffer for decoding data, no cap 💅

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🌸 SYNOPSIS 🌸

void xdr_set_scratch_buffer (struct xdr_stream *xdr , void *buf , size_t
buflen );

literally that's the whole signature, copy it exactly, don't @ me 🫶

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🦋 ARGUMENTS 🦋

• xdr — pointer to the xdr_stream struct, your main character rn 👑
• buf — pointer to an empty buffer, gotta be empty, it's a scratch buffer okurrr 🙈
• buflen — the size of buf, i.e. how much room your buffer actually has ✨

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🍓 DESCRIPTION 🍓

so here's the tea ☕ — the scratch buffer gets used when you're decoding from an array of pages 📚

if an xdr_inline_decode call spans across page boundaries 😭 (the audacity), then we copy the data into the scratch buffer so you get linear access 💫 iconic behaviour honestly, very slay, very "i made it work" energy.

lowkey the whole point: pages are chopped up, your decode needs it in one piece, so the scratch buffer is the middleman 🤝

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🌈 SEE ALSO 🌈

kernel file ./include/linux/sunrpc/xdr.h and honestly the whole friend group 🫶:

• xdr_set_scratch_folio(9)
• xdr_reset_scratch_buffer(9)
• xdr_commit_encode(9)
• xdr_stream_remaining(9)
• xdr_align_size(9)
• xdr_pad_size(9)
• xdr_stream_encode_item_present(9)
• xdr_stream_encode_item_absent(9)
• xdr_encode_bool(9)
• xdr_stream_encode_bool(9)
• xdr_stream_encode_u32(9)
• xdr_stream_encode_be32(9)
• xdr_stream_encode_u64(9)
• xdr_stream_encode_opaque_inline(9)
• xdr_stream_encode_opaque_fixed(9)
• xdr_stream_encode_opaque(9)
• xdr_stream_encode_uint32_array(9)
• xdr_item_is_absent(9)
• xdr_item_is_present(9)
• xdr_stream_decode_bool(9)
• xdr_stream_decode_u32(9)
• xdr_stream_decode_be32(9)
• xdr_stream_decode_u64(9)
• xdr_stream_decode_opaque_fixed(9)
• xdr_stream_decode_opaque_inline(9)
• xdr_stream_decode_uint32_array(9)

the way that's a whole roster 💀 go read them, bestie, i believe in you 🧚

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that's the page!! from ./include/linux/sunrpc, dated October 2026, source vibes and all 💜 mwah, go decode something pretty 🌸✨