[LTP] [PATCH v5] Refactor aiocp using new LTP API

[Petr Vorel]

Hi Andrea, Cyril,

> Hi!
> The code looks good now, but still needs a runtime treatement similar to
> the one done in 3ab0b3cb24198a0a833e4450b8bc9cee8b70baf6.

OK, new version is needed. When you're in it, could you please consider things
Cyril asked in v1? [1]

* rename functions
	I guess that it would be cleaner to rename the functions to something as
	put_iocb() and get_iocb() since they do not allcate anything but they
	have to stay.

* I suppose later you implement ioctl() BLKSZGET
	> -static int dev_block_size_by_path(const char *path)

	Just FYI this is actually the only correct way how to get the O_DIRECT
	block size, we have to get the device and then call the BLKSZGET
	ioctl(). This code has to be put into the test library and reused in all
	O_DIRECT tests in a followup patch.

Kind regards,
Petr

[1] https://patchwork.ozlabs.org/comment/2917667/