svc_rdma_build_read_chunk(9)

📦 version 7.3.1, in nixpkgs unstable

✨ svc_rdma_build_read_chunk(9) ✨

okay bestie, so this one's a kernel API manual page from the Linux Kernel API Manual, and it's literally about building RDMA Read WQEs to pull one RDMA chunk. yes, just one. we love a focused icon. 💅

🌸 SYNOPSIS 🌸

int svc_rdma_build_read_chunk (struct svc_rqst *rqstp , struct
       svc_rdma_recv_ctxt *head , const struct svc_rdma_chunk *chunk );

🎀 ARGUMENTS 🎀

  • rqstp — your RPC transaction context, the main character of this whole little operation 🫶
  • head — the context for the I/O that's currently happening, like the group chat log for this transfer
  • chunk — the Read chunk we're pulling. that's the one. the chosen one. ✨

💖 DESCRIPTION 💖

so what does it actually do? it builds RDMA Read WQEs to pull one RDMA chunk. that's the whole vibe. one chunk, properly pulled, no cap.

and here's the return value tea, because you know we gotta know what comes back:

  • 0 — slay, the Read WR chain was constructed successfully 💅
  • -EINVAL — nope, there were not enough resources to finish 😭
  • -ENOMEM — allocating a local resources failed (yes, that's exactly how the original says it, "a local resources", we don't gatekeep grammar 💀)
  • -EIO — a DMA mapping error occurred, and that's the "something went wrong in the plumbing" moment 🙈
bestie please actually check the return value. all four of those are real and they all mean different things. 0 is the only happy one.

🦋 SEE ALSO 🦋

the kernel file lives right here, character for character:

./net/sunrpc/xprtrdma/svc_rdma_rw.c

and here come the siblings, the whole extended family, all twenty-two of them, no skipping, we don't do that here 👑

that's the whole page bestie, nothing hidden, nothing skipped, we ate and left no crumbs 🍓

and this little masterpiece comes to you courtesy of the kernel path ./net/sunrpc/xprtrdma, dated October 2026, and filed under svc_rdma_build_read_chunk(9) — go forth and pull your chunks, icon 🌈⭐👑

📦 where this page comes from