RDMA_CREATE_ID(3)

NAME
rdma_create_id - Allocate a communication identifier.

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);

ARGUMENTS

channel
    The communication channel that events associated with the allocated rdma_cm_id will be reported on.

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.

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

NOTES
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. Communication events on an rdma_cm_id are reported through the associated event channel. 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.

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)