[PATCH v2 0/5] random fixes for fstests

[Zorro Lang <zlang@kernel.org>]

V2 did below changes:

[PATCH v2 1/5] generic/139: require 512 bytes to be the minimum dio
Improve the code change in _require_odirect()

[PATCH v2 2/5] generic/506: call _require_quota before _qmount
Nothing changed

[PATCH v2 3/5] generic/591: remove redundant output from golden image
Replace fflush(stdout) with setlinebuf(stdout). Thanks the review from Dave.

[PATCH v2 4/5] generic/591: use proper sector size
Remove bad binary files commit, and deal with them in [5/5].

[PATCH v2 5/5] gitignore: ignore missed binary files in src
Add two binary files to .gitignore file.

Removed original "[PATCH 5/5] generic/623: add overlay into the blacklist",
Amir would like to use another patch to deal with it.

=== Messages from orignal V1 ===
These 5 patches are random fixes, except patch 4/5 bases on 3/5.

 - [PATCH 1/5] generic/139: require 512 bytes to be the minimum dio size
I tried to help it support 4096 sector size, but it's not simple, especially
the golden image broken. So I'm thinking how about limit it in 512 bytes dio
testing.

 - [PATCH 2/5] generic/506: call _require_quota before _qmount
As subject

 - [PATCH 3/5] generic/591: remove redundant output from golden image
I think I found where's the issue from, but I'm not sure if it's the best
way to fix it. So welcome suggestions :)

 - [PATCH 4/5] generic/591: use proper sector size
Help splice-test to support a sector size option

 - [PATCH 5/5] generic/623: add overlay into the blacklist
I think it's simple to exclude overlay from this test directly, or we have to
check if $FSTYP=overlay, then think about how to deal with OVL_BASE_SCRATCH_DEV
things.

Thanks,
Zorro