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. -- Jens Axboe
