Copyright (C) 2021 Stefan Roesch <[email protected]>

SPDX-License-Identifier: LGPL-2.0-or-later

io_uring_register_files - register file descriptors

 #include <liburing.h> 

 "int io_uring_register_files(struct io_uring *" ring ","  " const int *" files ","  " unsigned " nr_files ");" 

 "int io_uring_register_files_sparse(struct io_uring *" ring ","  " unsigned " nr_files ");" 

The io_uring_register_files (3) function registers nr_files number of file descriptors defined by the array files belonging to the ring for subsequent operations. The io_uring_register_files_sparse (3) function registers an empty file table of nr_files number of file descriptors. The sparse variant is available in kernels 5.19 and later. Registering a file table is a prerequisite for using any request that uses direct descriptors.

On success io_uring_register_files (3) and io_uring_register_files_sparse (3) return 0. On failure they return -errno . io_uring_get_sqe (3), io_uring_unregister_files (3)