smb2_prep_rdma_read(9)

📦 version 7.3.1, in nixpkgs unstable

💅 smb2_prep_rdma_read(9) — Kernel API Manual, section 9 🎀

okay so bestie, gather round, because today we're looking at smb2_prep_rdma_read — a little kernel function from the Kernel API Manual, section 9, and honestly? it's giving "small but mighty" ✨

🌸 NAME 🌸

smb2_prep_rdma_read — transform an RDMA READ payload 💫

🦋 SYNOPSIS 🦋

int smb2_prep_rdma_read (struct ksmbd_work *work , struct smb2_read_req
*req , struct smb2_read_rsp *rsp , void *data , unsigned int datalen );

like, that's the whole signature, no cap 🫶

🎀 ARGUMENTS 🎀

  • work — the request work item. your main character struct for this call 💖
  • req — the READ request, and it's the one controlling encryption or signing, so it's lowkey the boss here
  • rsp — the READ response, and this is where the transform metadata goes to live ✨
  • data — the actual data that will be transferred through RDMA. the payload bestie herself 🌈
  • datalen — the data length, obviously, we love a straightforward queen 👑

💜 DESCRIPTION 💜

So what does it actually do? Two things, and both of them are in place:

  1. It encrypts the payload in place 🔥
  2. It encodes the detached crypto metadata into the response buffer 🧚

that's it, that's the vibe. no extra steps, no drama, just crypto business handled 💅

⭐ RETURN ⭐

The function returns the metadata length 🎉

But also, watch out:

  • returns zero when no transform applies 🙈
  • or a negative errno if something went wrong 😭
ngl bestie, always check that return value. zero is a valid answer here, and negative means trouble 💀

👑 SEE ALSO 👑

okay this list is LONG and honestly kind of iconic — everything from the same neighbourhood, Kernel file ./fs/smb/server/smb2pdu.c 🍓:

like, the whole friend group showed up 💀💖

and that's the page bestie!! 🦋 this one came out of ./fs/smb/server, dated October 2026, and it's filed under smb2_prep_rdma_read(9) — go forth and transform those payloads, you absolute icon 👑✨

📦 where this page comes from