>How does UD operation work with the SID anyhow?
Not sure what you mean here. The passive side listens on a SID. Either a REQ
or SIDR REQ can match with that. For UD, the expectation is that it will be a
SIDR REQ. (The rdma cm needs a changed to reject whichever is unexpected.)
>So where does ai_qp_type get stuffed in user space?
Right now, there's a new call:
int rdma_create_ep(struct rdma_cm_id **id, struct rdma_addrinfo *res,
struct ibv_pd *pd, struct ibv_qp_init_attr *qp_init_attr);
Based on whether RAI_PASSIVE flag is set and the input parameters, this provides
functionality similar to:
rdma_create_id / rdma_bind_addr
or
rdma_create_id / rdma_resolve_addr / rdma_resolve_route / rdma_create_qp
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