NAME

       io_uring_submit - submit requests to the submission queue

SYNOPSIS

       #include <liburing.h>

       int io_uring_submit(struct io_uring *ring);

DESCRIPTION

       The  io_uring_submit(3) function submits the next events to the submission queue belonging
       to the ring.

       After the caller retrieves a submission queue entry  (SQE)  with  io_uring_get_sqe(3)  and
       prepares   the  SQE  using  one  of  the  provided  helpers,  it  can  be  submitted  with
       io_uring_submit(3).

RETURN VALUE

       On success io_uring_submit(3) returns the number of submitted submission queue entries. On
       failure it returns -errno.

NOTES

       For  any  request  that  passes in data in a struct, that data must remain valid until the
       request has been successfully submitted. It need not remain valid until completion. Once a
       request  has  been  submitted,  the in-kernel state is stable. Very early kernels (5.4 and
       earlier) required state to be stable until the completion occurred. Applications can  test
       for  this  behavior  by  inspecting  the  IORING_FEAT_SUBMIT_STABLE  flag passed back from
       io_uring_queue_init_params(3).  In general, the man pages for the individual prep  helpers
       will have a note mentioning this fact as well, if required for the given command.

SEE ALSO

       io_uring_get_sqe(3), io_uring_submit_and_wait(3), io_uring_submit_and_wait_timeout(3)