назначьте идентификатор связи (Allocate a communication identifier.)
Имя (Name)
rdma_create_id - Allocate a communication identifier.
Синопсис (Synopsis)
#include <rdma/rdma_cma.h>
int rdma_create_id (struct rdma_event_channel *channel, struct
rdma_cm_id **id, void *context, enum rdma_port_space ps);
Аргументы (Arguments)
channel The communication channel that events associated with
the allocated rdma_cm_id will be reported on. This
may be NULL.
id A reference where the allocated communication
identifier will be returned.
context User specified context associated with the
rdma_cm_id.
ps RDMA port space.
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)
Rdma_cm_id's are conceptually equivalent to a socket for RDMA
communication. The difference is that RDMA communication
requires explicitly binding to a specified RDMA device before
communication can occur, and most operations are asynchronous in
nature. Asynchronous communication events on an rdma_cm_id are
reported through the associated event channel. If the channel
parameter is NULL, the rdma_cm_id will be placed into synchronous
operation. While operating synchronously, calls that result in
an event will block until the operation completes. The event
will be returned to the user through the rdma_cm_id structure,
and be available for access until another rdma_cm call is made.
Users must release the rdma_cm_id by calling rdma_destroy_id.
PORT SPACE
Details of the services provided by the different port spaces are
outlined below.
RDMA_PS_TCP
Provides reliable, connection-oriented QP communication.
Unlike TCP, the RDMA port space provides message, not
stream, based communication.
RDMA_PS_UDP
Provides unreliable, connectionless QP communication.
Supports both datagram and multicast communication.
RDMA_PS_IB
Provides for any IB services (UD, UC, RC, XRC, etc.).
Смотри также (See also)
rdma_cm(7), rdma_create_event_channel(3), rdma_destroy_id(3),
rdma_get_devices(3), rdma_bind_addr(3), rdma_resolve_addr(3),
rdma_connect(3), rdma_listen(3), rdma_set_option(3)
