RDMA_CREATE_EP(3)        Librdmacm Programmer's Manual       RDMA_CREATE_EP(3)

NAME
       rdma_create_ep - Allocate a communication identifier and optional QP.

SYNOPSIS
       #include <rdma/rdma_cma.h>

       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);

ARGUMENTS
       id          A reference where the allocated communication identifier
                   will be returned.

       res         Address information associated with the rdma_cm_id returned
                   from rdma_getaddrinfo.

       pd          Optional protection domain if a QP is associated with the
                   rdma_cm_id.

       qp_init_attr
                   Optional initial QP attributes.

DESCRIPTION
       Creates an identifier that is used to track communication information.

RETURN VALUE
       Returns 0 on success, or -1 on error.  If an error occurs, errno will
       be set to indicate the failure reason.

NOTES
       After resolving address information using rdma_getaddrinfo, a user may
       use this call to allocate an rdma_cm_id based on the results.

       If the rdma_cm_id will be used on the active side of a connection,
       meaning that res->ai_flag does not have RAI_PASSIVE set, rdma_create_ep
       will automatically create a QP on the rdma_cm_id if qp_init_attr is not
       NULL.  The QP will be associated with the specified protection domain,
       if provided, or a default protection domain if not.  Users should see
       rdma_create_qp for details on the use of the pd and qp_init_attr
       parameters.  After calling rdma_create_ep, the returned rdma_cm_id may
       be connected by calling rdma_connect.  The active side calls
       rdma_resolve_addr and rdma_resolve_route are not necessary.

       If the rdma_cm_id will be used on the passive side of a connection,
       indicated by having res->ai_flag RAI_PASSIVE set, this call will save
       the provided pd and qp_init_attr parameters.  When a new connection
       request is retrieved by calling rdma_get_request, the rdma_cm_id
       associated with the new connection will automatically be associated
       with a QP using the pd and qp_init_attr parameters.  After calling
       rdma_create_ep, the returned rdma_cm_id may be placed into a listening
       state by immediately calling rdma_listen.  The passive side call
       rdma_bind_addr is not necessary.  Connection requests may then be
       retrieved by calling rdma_get_request.

       The newly created rdma_cm_id will be set to use synchronous operation.
       Users that wish asynchronous operation must migrate the rdma_cm_id to a
       user created event channel using rdma_migrate_id.

       Users must release the created rdma_cm_id by calling rdma_destroy_ep.

SEE ALSO
       rdma_cm(7), rdma_getaddrinfo(3), rdma_create_event_channel(3),
       rdma_connect(3), rdma_listen(3), rdma_destroy_ep(3), rdma_migrate_id(3)

librdmacm                         2010-07-19                 RDMA_CREATE_EP(3)