svc_rdma_read_call_chunk(9)

📦 version 7.3.1, in nixpkgs unstable

💖 svc_rdma_read_call_chunk 💖

okay so bestie, welcome to the svc_rdma_read_call_chunk(9) page — that's the Kernel API Manual, and yes it's exactly as niche and iconic as it sounds 🎀

✨ NAME ✨

svc_rdma_read_call_chunk — build RDMA Read WQEs to pull a Long Message 🫶

like. that's the whole vibe. it builds the WQEs. it pulls the Long Message. slay.

🌸 SYNOPSIS 🌸

int svc_rdma_read_call_chunk (struct svc_rqst *rqstp , struct
svc_rdma_recv_ctxt *head );

no cap, that's literally the signature — copy it exactly, don't get creative 💅

🦋 ARGUMENTS 🦋

  • rqstp — the RPC transaction context ✨ this is the main character of the transaction btw
  • head — context for the ongoing I/O 💫

🧚 DESCRIPTION 🧚

the way this function just returns values and each one is a whole mood:

  • 0 — RDMA Read WQEs were successfully built 🎉 ate, no crumbs
  • -EINVAL — there were not enough resources to finish 😭 it's giving "ran out of stuff mid-task"
  • -ENOMEM — the rdma_rw context pool was exhausted 💀 gone. empty. the pool said "no <3"
  • -ENOTCONN — posting failed (connection is lost) 🙈 the connection literally left the chat
  • -EIO — rdma_rw initialization failed (DMA mapping, etc.) 😬 like the init just did not happen, DMA mapping and friends included
bestie please read the return values, they are not decorative. each negative one tells you exactly which part of the situation went sideways 👑

🌈 SEE ALSO 🌈

the kernel file in question, for the curious girlies:

Kernel file ./net/sunrpc/xprtrdma/svc_rdma_rw.c

and the whole friend group 🫶:

and that's the page!! 🎀 this little gift came to you from the source path ./net/sunrpc/xprtrdma, dated October 2026 — so like, mark your calendar bestie, and remember: svc_rdma_read_call_chunk(9) said what it said 💜✨

📦 where this page comes from