ib_cm_insert_listen(9)

📦 version 7.3.1, in nixpkgs unstable

🌸 ib_cm_insert_listen(9) 🌸

ok so this is a page from the Kernel API Manual, and honestly? it's a little baddie. it's all about grabbing yourself a listening ib_cm_id and parking it on a service ID. let's get into it bestie 💅

✨ NAME ✨

ib_cm_insert_listen — creates a fresh listening ib_cm_id and listens on the service ID you hand it. that's the whole vibe. 🎀

🦋 SYNOPSIS 🦋

struct ib_cm_id * ib_cm_insert_listen (struct ib_device *device ,
ib_cm_handler cm_handler , __be64 service_id );

like, look at her. three args, one pointer back. iconic. ✨

💖 ARGUMENTS 💖

  • device — the device the cm_id is associated with. everything communication-wise that's related to this will be tied to the device you specify here. no cap, it's all in on that device 🫶
  • cm_handler — the callback that gets invoked to notify the user of CM events. think of it as your little messenger fairy 🧚
  • service_id — the service identifier that gets matched against incoming connection requests and service ID resolution requests. important detail bestie: the service ID should be specified in network-byte order. and if you set it to IB_CM_ASSIGN_SERVICE_ID, the CM will assign a service ID to the caller for you. slay, it does the work 💅

🔥 DESCRIPTION 🔥

okay so here's the tea: if there's already an existing ID listening on that same device and that same service ID, you just get it back. no new one, no drama. return to sender, basically 💌

and listen — callers should call ib_destroy_cm_id when they're done with the listener ID. like please clean up after yourself, we're not animals 🙈

👑 SEE ALSO 👑

and that's the whole page, bestie. go forth and listen responsibly 🌈⭐

reminder from your girl: network-byte order for service_id, and ib_destroy_cm_id when you're done. that's the whole manifesto 💀

so cute, so official — brought to you by ./drivers/infiniband/core, dated October 2026, and yes that's the ib_cm_insert_listen(9) manual you just read 🎀✨

📦 where this page comes from