Re: [PATCH] fstests: cleanup $TEST_DIR/$seq* files

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On Fri, Feb 3, 2017 at 11:35 AM, Eryu Guan <eguan@xxxxxxxxxx> wrote:
> On Fri, Jan 27, 2017 at 12:39:49PM +0200, Amir Goldstein wrote:
>> Test generic/007 was failing after running test overlay/007,
>> because the latter left behind a directory named 007 in test dir
>> and the former failed to mkdir a directory with the same name.
>>
>> Greping the tests for the pattern $TEST_DIR/$seq* found some more
>> files/dirs of this sort that were not being cleaned up.
>>
>> Clean those files/dir on _cleanup trap to fix the 007 tests collision
>> and avoid similar collisions in future tests.
>>
>> Left the directories $TEST_DIR/$seq.mnt in tact, because they are
>> always empty and created with mkdir -p.
>>
>> There are more files left behind as can be seen in any aged test dir.
>
> TEST_DIR is supposed to be aged over multiple runs, so leaving test
> files in it should be just fine, unless these files are consuming a lot
> of free space and would block subsequent tests.
>

Good point, but aging doesn't mean that the files need to stay there
create + delete is perfectly good aging.
As a matter of fact, all these test take care of removing the test
files *before* running the test, so why not cleanup *after* the test as well?
I can understand why it makes sense to leave behind $seq.$$ files to
fill up TEST_DIR with junk over time, but I cannot understand the reasoning
to leave behind $seq.<const> files, which are going to be removed before
next run anyway.


> For tests that need an empty dir or a newly created file in TEST_DIR,
> they could just remove the dir or file in test setup phase before doing
> any actual setups.
>
> So I think adding "-p" to mkdir command in generic/007 looks sufficient.
>

Fair enough, but please give this cleanup issue a second thought.

> Thanks,
> Eryu
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