Also changes the fsync prep helper to require passing in the actual
flag, not just a boolean for fsync vs fdatasync.
Signed-off-by: Jens Axboe <axboe@kernel.dk>
io_uring_queue_init does not allow the caller to specify sq_thread_cpu
or sq_thread_idle. Users that want to specify those parameters need to
call io_uring_setup(2) themselves. Add a helper so that they don't also
have to hand-craft the code to map the submission and completion queues,
and setup the sqe ring. This allows those applications to still make
use of io_uring_submit and get/wait_completion.
Signed-off-by: Jeff Moyer <jmoyer@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Applications should not need to care about this, we can pass it in
ourselves. Once the libc support is there, we won't expose this
parameter either.
Signed-off-by: Jens Axboe <axboe@kernel.dk>
We don't need any of the information in there in the caller, and
this makes it harder to abuse as we don't require the caller to
have memset() the struct first.
Signed-off-by: Jens Axboe <axboe@kernel.dk>
- Fixed buffers are now available through io_uring_register()
- Various thread/wq options are now dead and automatic instead
- sqe->index is now sqe->buf_index
- Fixed buffers require flag, not separate opcode
Signed-off-by: Jens Axboe <axboe@kernel.dk>
- io_uring_sqe added a data field that's passed back at completion
- io_uring_sqe added an index field, for fixed buffer locations
- io_uring_setup(2) system call added a 'nr_iovecs' field
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This is cleaner than having the app juggle an SQ and CQ ring,
just wrap them in struct io_uring and have the API always take
that. This means the app doesn't need to worry about the different
types of rings, and that we only need to pass in one argument
for setup/teardown.
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This now exposes two helpers:
io_uring_get_completion()
Return a completion, if we have one (or more) available in
the ring
io_uring_wait_completion()
Return a completion, waiting for it if necessary
Signed-off-by: Jens Axboe <axboe@kernel.dk>
