On Thu, Jan 30, 2020 at 11:13 AM Jens Axboe <axboe@xxxxxxxxx> wrote: > > On 1/30/20 9:00 AM, Glauber Costa wrote: > > It is common for an application using an ever-evolving interface to want > > to inquire about the presence of certain functionality it plans to use. > > > > Information about opcodes is stored in a io_uring_probe structure. There > > is usually some boilerplate involved in initializing one, and then using > > it to check if it is enabled. > > > > This patch adds two new helper functions: one that returns a pointer to > > a io_uring_probe (or null if it probe is not available), and another one > > that given a probe checks if the opcode is supported. > > This looks good, I committed it with minor changes. > > On top of this, we should have a helper that doesn't need a ring. So > basically one that just sets up a ring, calls io_uring_get_probe(), > then tears down the ring. > I'd be happy to follow up with that. Just to be sure, the information returned by probe should be able to outlive the tear down of the ring, right ?
