NAME

       io_uring_free_buf_ring - register and free a buffer ring for provided buffers

SYNOPSIS

       #include <liburing.h>

       int io_uring_free_buf_ring(struct io_uring *ring,
                                  struct io_uring_buf_ring *br,
                                  unsigned int nentries,
                                  int bgid);

DESCRIPTION

       The  io_uring_free_buf_ring(3)  function unregisters a previously registered shared buffer ring. The ring
       must have heen previously returned from io_uring_setup_buf_ring(3).

       The ring argument must pointer to the ring for which the provided buffer ring  is  being  registered,  br
       must  point to a buffer ring previously returned by io_uring_setup_buf_ring(3), nentries is the number of
       entries requested in the buffer ring, and bgid is the buffer group ID that br was setup with.

       Under the covers, this function uses io_uring_unregister_buf_ring(3) to unregister the ring, and  handles
       the freeing of the ring rather than letting the application open code it.

       Available since 5.19.

RETURN VALUE

       On success io_uring_free_buf_ring(3) returns a pointer to the buffe ring. On failure it returns -errno.

SEE ALSO

       io_uring_setup_buf_ring(3)

liburing-2.4                                      Mar 07, 2023                         io_uring_free_buf_ring(3)