io_uring_ring_dontfork(3)       liburing Manual      io_uring_ring_dontfork(3)

NAME
       io_uring_ring_dontfork - prevent ring memory from being shared after
       fork

SYNOPSIS
       #include <liburing.h>

       int io_uring_ring_dontfork(struct io_uring *ring);

DESCRIPTION
       The io_uring_ring_dontfork(3) function ensures that the mmap'ed rings
       for the io_uring instance ring are not available to a child process
       after a fork(2).

       This function uses madvise(2) with MADV_DONTFORK on the mmap'ed ranges
       to prevent them from being shared with child processes. This is useful
       when the parent wants exclusive access to the ring and doesn't want the
       child to be able to access or interfere with it.


RETURN VALUE
       Returns 0 on success. On error, a negative errno value is returned.

SEE ALSO
       io_uring_queue_init(3), madvise(2), fork(2)

liburing-2.4                   January 18, 2025      io_uring_ring_dontfork(3)