io_uring_free_buf_ring(3) liburing Manual io_uring_free_buf_ring(3) NAME io_uring_free_buf_ring - register and free a buffer ring for provided buffers SYNOPSIS #include 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 zero. On failure it returns -errno. SEE ALSO io_uring_setup_buf_ring(3) liburing-2.4 March 7, 2023 io_uring_free_buf_ring(3)