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   rdma_create_ep    ( 3 )

назначьте идентификатор связи и дополнительный QP (Allocate a communication identifier and optional QP.)

Имя (Name)

rdma_create_ep - Allocate a communication identifier and optional
       QP.

Синопсис (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);


Аргументы (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.


Описание (Description)

Creates an identifier that is used to track communication
       information.

Возвращаемое значение (Return value)

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

Примечание (Note)

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.


Смотри также (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)