[0/3] xfstests: add IO_URING test cases

Message

Zorro Lang Sept. 16, 2020, 5:14 p.m. UTC

This patchset bases on https://patchwork.kernel.org/cover/11769847/, which
makes xfstests fsstress and fsx supports IO_URING.

The io_uring IOs in fsstress will be run automatically when fsstress get
running. But fsx need a special option '-U' to run IO_URING read/write, so
add two new cases to xfstests to do fsx buffered and direct IO IO_URING
test.

[1/3] new helper to require io_uring feature
[2/3] fsx buffered IO io_uring test
[3/3] fsx direct IO io_uring test

And the [2/3] just found an io_uring regression bug (need LVM TEST_DEV):
https://bugzilla.kernel.org/show_bug.cgi?id=209243

Feel free to tell me, if you have more suggestions to test io_uring on
filesystem.

Thanks,
Zorro