ibvallocpd
ibv_alloc_pd is a function in the libibverbs API used to allocate a protection domain (PD) for a given RDMA device context. A protection domain provides an isolation boundary for memory regions, queue pairs, and other resources, ensuring that memory registrations and queue pairs created within the PD can only access memory and resources associated with that same PD.
The function takes a single argument: a pointer to a populated RDMA device context (struct ibv_context *context).
A protection domain serves as a scope for resources used in RDMA operations. Memory regions registered with
To release resources, the application calls ibv_dealloc_pd with the pointer returned by ibv_alloc_pd. Deallocation frees the
Common error conditions include insufficient resources (ENOMEM), invalid or closed context (EINVAL or ENODEV), or other
See also: ibv_dealloc_pd, ibv_reg_mr, ibv_create_qp. ibv_alloc_pd is a foundational step in setting up RDMA resources on