rpcrdma_marshal_req(9)

okay so bestie, welcome to the rpcrdma_marshal_req(9) page from the Kernel API Manual — we're gonna make this make sense, no cap 💅✨

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🎀 NAME 🎀

rpcrdma_marshal_req — Marshal and send one RPC request 🫶

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✨ SYNOPSIS ✨

int rpcrdma_marshal_req (struct rpcrdma_xprt *r_xprt , struct rpc_rqst *rqst );

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🌸 ARGUMENTS 🌸

• r_xprt — controlling transport 🚂
• rqst — RPC request to be marshaled 📦

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💖 DESCRIPTION 💖

so for the RPC in rqst, this function is literally doing all of this:

• Chooses the transfer mode (eg., RDMA_MSG or RDMA_NOMSG) 🌀
• Registers Read, Write, and Reply chunks 🧩
• Constructs the transport header 🛠️
• Posts a Send WR to send the transport header and request 📤

like it's giving "full request glow-up" energy, fr fr 🔥

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⭐ RETURN ⭐

• 0 if the RPC was sent successfully 🎉
• -ENOTCONN if the connection was lost 😭
• -EAGAIN if the caller should call again with the same arguments 🔁
• -ENOBUFS if the caller should call again after a delay ⏳
• -EMSGSIZE if the transport header is too small 📏
• -EIO if a permanent problem occurred while marshaling 💀

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🦋 SEE ALSO 🦋

• Kernel file ./net/sunrpc/xprtrdma/rpc_rdma.c 📁
• rpcrdma_set_max_header_sizes(9)
• rpcrdma_sendctx_unmap(9)
• rpcrdma_prepare_send_sges(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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mwah 💋 this page's source/version is ./net/sunrpc/xprtrdma, dated October 2026, and that's the wrap bestie 🫶🎀