tree 750b990337ef4e197b7da915acec97d8f00d3a4c
parent a81bc3102b4ffb885f34855d0133f862f915ab13
author Jeff Layton <jlayton@kernel.org> 1573656966 -0500
committer Ilya Dryomov <idryomov@gmail.com> 1573753491 +0100

ceph: increment/decrement dio counter on async requests

Ceph can in some cases issue an async DIO request, in which case we can
end up calling ceph_end_io_direct before the I/O is actually complete.
That may allow buffered operations to proceed while DIO requests are
still in flight.

Fix this by incrementing the i_dio_count when issuing an async DIO
request, and decrement it when tearing down the aio_req.

Fixes: 321fe13c9398 ("ceph: add buffered/direct exclusionary locking for reads and writes")
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>