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2019-06-03Do not assume p->{cq,sq}_off.head is 0Kornilios Kourtis
Ring memory is released by umapping {cq,sq}->khead, which assumes that p->{cq,sq}_off.head will always be 0. Add another field to for the mmaped region and use that instead of ->khead when umapping. Signed-off-by: Kornilios Kourtis <kkourt@kkourt.io> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-05-27liburing,queue,setup: handle IORING_SQ_NEED_WAKEUP for io_uring_submit()Roman Penyaev
Enter kernel only if SQ thread is off or wakeup is needed. Signed-off-by: Roman Penyaev <rpenyaev@suse.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-05-27setup: return -errno explicitly from io_uring_queue_init()Roman Penyaev
Signed-off-by: Roman Penyaev <rpenyaev@suse.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-05-20Fix leak of fd in io_uring_queue_init() on failureJens Axboe
If the ring setup fails, close the fd before returning failure. Reported-by: Kornilios Kourtis <kkourt@kkourt.io> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-05-20fix harmless typo in sq_entries in io_uring_mmapWeiping Zhang
We really should use a ';' to terminate the line. This is just a cosmetic issue, no functional changes. Signed-off-by: Weiping Zhang <zhangweiping@didiglobal.com> Modified wording Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-02-08add io_uring_queue_mmapJeff Moyer
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>
2019-01-17Split src/io_uring.c upJens Axboe
Let's have the various helpers be in usefully named functions, no need to bundle them all into the same one. Signed-off-by: Jens Axboe <axboe@kernel.dk>