io_uring_register_ifq3
Register a zero-copy receive interface queue
Usage
#include <liburing.h>
int io_uring_register_ifq(struct io_uring *ring, struct io_uring_zcrx_ifq_reg *reg);
Overview
The io_uring_register_ifq(3) function registers a zero-copy receive interface queue with the io_uring instance specified by ring. Zero-copy receive allows the kernel to place incoming network data directly into application-provided memory without copying.
The reg argument is a pointer to a struct io_uring_zcrx_ifq_reg that describes the interface queue to register. See io_uring_register(2) for a description of the IORING_REGISTER_ZCRX_IFQ operation and the structure fields.
The io_uring ring must have been created with IORING_SETUP_DEFER_TASKRUN and either IORING_SETUP_CQE32 or IORING_SETUP_CQE_MIXED flags set. The caller must have the CAP_NET_ADMIN capability.
Return value
Returns 0 on success. On error, a negative errno value is returned.