rxe_attach_mcast(9)

📦 version 7.3.1, in nixpkgs unstable

💖 rxe_attach_mcast(9) 💖

okay so bestie, welcome to the Kernel API Manual, section 9 — we're doing kernel-adjacent networking today and honestly? it's giving main character energy ✨

🌸 NAME 🌸

rxe_attach_mcast — attaches a qp to a multicast group 🫶 (peep IBA-11.3.1 for the receipts, iykyk)

🎀 SYNOPSIS 🎀

int rxe_attach_mcast (struct ib_qp *ibqp , union ib_gid *mgid , u16 mlid
);

🦋 ARGUMENTS 🦋

  • ibqp — the (IB) qp object 💅 like, the queue pair we're doing all this for
  • mgid — the multicast IP address 🌈
  • mlid — the multicast LID. lowkey gets ignored for RoCEv2, no cap (see IBA-A17.5.6 for the lore 👀)

⭐ RETURN ⭐

0 on success — slay 💅 — otherwise you get an errno 😭 (yeah, something went sideways, bestie)

🧚 SEE ALSO 🧚

Kernel file: ./drivers/infiniband/sw/rxe/rxe_mcast.c — literally the whole squad lives here:

🫶 friendly lil reminder: the double-underscore ones are the internal besties, the plain ones are the ones you actually call. the way that convention ate 🔥

okay that's the whole page, periodt 💜 this cutie came from ./drivers/infiniband/sw/rxe and it's dated October 2026 — go forth and attach those multicast groups, icon 👑✨

📦 where this page comes from