rpcrdma_prepare_send_sges(9)

💅 rpcrdma_prepare_send_sges(9) 💅

okay bestie, welcome to the Kernel API Manual — yes, we're in the kernel today, put your big-girl hat on, it's giving ✨serious business✨ but make it cute.

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🌸 NAME 🌸

rpcrdma_prepare_send_sges — the function that constructs SGEs for a Send WR. that's it, that's the whole vibe. it builds scatter/gather entries so your Send work request can actually go somewhere 🎀

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🦋 SYNOPSIS 🦋

int rpcrdma_prepare_send_sges (struct rpcrdma_xprt *r_xprt , struct
       rpcrdma_req *req , u32 hdrlen , struct xdr_buf *xdr , enum
       rpcrdma_chunktype rtype );

like, five arguments, one int coming back. she's compact, she's iconic, she's lowkey doing a lot 💅

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💖 ARGUMENTS 💖

• r_xprt — the controlling transport. think of it as the main character of this whole operation 👑
• req — the context of the RPC Call being marshalled. this is where the actual Call lives while it's getting its act together 🫶
• hdrlen — size of the transport header, in bytes. yes bestie, bytes, we count in bytes here 🔢
• xdr — the xdr_buf containing the RPC Call. the payload's home address fr fr 🏠
• rtype — the chunk type being encoded. which flavor of chunk are we dealing with, iykyk 🌈

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✨ DESCRIPTION ✨

Returns 0 on success; otherwise a negative errno is returned.

that's the whole deal, no cap. zero means slay 💚, negative errno means something went off and you gotta go read the errno like it's a text from your situationship 😭

ngl there is truly not a lot of prose here — the details are all up in ARGUMENTS. read those, they ate.

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🎀 SEE ALSO 🎀

• Kernel file ./net/sunrpc/xprtrdma/rpc_rdma.c — the source, the origin story, the blueprint 💀
• rpcrdma_set_max_header_sizes(9)
• rpcrdma_sendctx_unmap(9)
• rpcrdma_marshal_req(9)
• rpcrdma_reset_cwnd(9)
• rpcrdma_inline_fixup(9)
• rpcrdma_unpin_rqst(9)
• rpcrdma_complete_rqst(9)
• rpcrdma_reply_handler(9)

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and that's the page, bestie 🧚 this one came to you from ./net/sunrpc/xprtrdma, dated October 2026 — a whole little time capsule of kernel lore. go forth and prepare those SGEs, you've got this 💜🔥