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

SEE ALSO

       io_uring_setup_buf_ring(3)