ib_alloc_xrcd_user(9)

💅 ib_alloc_xrcd_user — the man page bestie (kernel API manual, section 9, ily)

okay so picture this: you're deep in the kernel API manual, section 9, and you have found... ib_alloc_xrcd_user. it's giving "small function, big responsibilities" and honestly? we're obsessed. this one Allocates an XRC domain. that's the whole vibe. that's the assignment. 🎀

---

✨ NAME ✨

ib_alloc_xrcd_user — Allocates an XRC domain. periodt. 💖

---

🌸 SYNOPSIS 🌸

lowkey the whole thing in one look:

struct ib_xrcd * ib_alloc_xrcd_user (struct ib_device *device , struct inode *inode , struct ib_udata *udata );

like yes, it returns a struct ib_xrcd *, and yes it takes exactly three things. no cap, that's it. 🦋

---

🧚 ARGUMENTS 🧚

three lil besties walk into a function call:

• device — the device on which to allocate the XRC domain. your main character hardware. everything happens here. 👑
• inode — inode to connect XRCD. yes, that inode. it's literally the connector. 🫶
• udata — Valid user data or NULL for kernel object. so like, hand over real user data, or pass NULL if you're doing the kernel-object thing. both are valid, pick your lane. 💀

---

🔥 SEE ALSO 🔥

the whole friend group, no one left behind — Kernel file ./drivers/infiniband/core/verbs.c plus these icons:

• __ib_alloc_pd(9)
• ib_dealloc_pd_user(9)
• rdma_copy_ah_attr(9)
• rdma_replace_ah_attr(9)
• rdma_move_ah_attr(9)
• rdma_create_ah(9)
• rdma_create_user_ah(9)
• rdma_move_grh_sgid_attr(9)
• rdma_destroy_ah_attr(9)
• ib_create_srq_user(9)
• ib_create_qp_user(9)
• ib_resolve_eth_dmac(9)
• ib_modify_qp_with_udata(9)
• ib_alloc_mr(9)
• ib_alloc_mr_integrity(9)
• ib_dealloc_xrcd_user(9)
• ib_create_wq(9)
• ib_destroy_wq_user(9)
• ib_map_mr_sg_pi(9)
• ib_map_mr_sg(9)
• ib_sg_to_pages(9)
• ib_drain_sq(9)
• ib_drain_rq(9)
• ib_drain_qp(9)
• rdma_alloc_hw_stats_struct(9)
• rdma_free_hw_stats_struct(9)

go read them. iykyk. 🌈⭐

---

💀 real talk though: read the prototypes before you call anything, bestie. the man page tells you the shape of things, not the whole story. 🙈

---

and that's the page!! 💜 brought to you by the ./drivers/infiniband/core girlies, dated October 2026, filed under ib_alloc_xrcd_user(9) — mwah, slay, go allocate something iconic. 🍓✨