cma_acquire_dev_by_src_ip(9)

💅 cma_acquire_dev_by_src_ip

okay bestie, welcome to the Kernel API Manual ✨ this one's a kernel-level baddie from the infiniband world and she is very specific about who she binds to. let's get into it 🫶

---

✨ NAME ✨

cma_acquire_dev_by_src_ip — acquires the cma device, port, and gid attribute, all based on the source ip address 💖

like, it literally reads your source IP and goes "okay this is your vibe, here's your device" no cap 🔥

---

🌸 SYNOPSIS 🌸

int cma_acquire_dev_by_src_ip (struct rdma_id_private *id_priv );

---

🎀 ARGUMENTS 🎀

• id_priv — the cm_id that should be bound to the cma device 👑 this is the main character of the call fr fr

---

🦋 DESCRIPTION 🦋

so cma_acquire_dev_by_src_ip binds the cm id to the cma device, the port, and the GID attribute, and it figures alllll of that out based on the source IP address 💫 like it's matching the IP to the whole fit, iykyk.

it returns 0 on success, or an error code otherwise 😭 that's the vibe check — zero means slay, anything else means something went sideways.

and the best part? it's applicable to both active and passive side cm_id 💅 so no matter which side you're on, she's got you.

---

🌈 SEE ALSO 🌈

• Kernel file ./drivers/infiniband/core/cma.c
• rdma_is_consumer_reject(9)
• rdma_iw_cm_id(9)
• cma_ib_acquire_dev(9)
• rdma_set_ack_timeout(9)
• rdma_set_min_rnr_timer(9)
• rdma_connect_locked(9)
• rdma_connect(9)
• rdma_connect_ece(9)
• rdma_accept(9)

like a whole friend group of related calls, go say hi to all of them 🧚💜

---

and that's the whole page bestie 🍓 this iconic lil entry lives over in ./drivers/infiniband/core and the version is dated October 2026 — go off, kernel docs, periodt 💀✨