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Re: [Qemu-block] [PATCH v7 for-2.12 24/25] block/curl: Implement bdrv_re

From: Max Reitz
Subject: Re: [Qemu-block] [PATCH v7 for-2.12 24/25] block/curl: Implement bdrv_refresh_filename()
Date: Fri, 8 Dec 2017 14:47:52 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.4.0

On 2017-12-05 11:31, Alberto Garcia wrote:
> On Mon 04 Dec 2017 07:26:02 PM CET, Max Reitz wrote:
>>>> +static void curl_refresh_filename(BlockDriverState *bs)
>>>> +{
>>>> +    BDRVCURLState *s = bs->opaque;
>>>> +
>>>> +    if (!s->sslverify || s->cookie ||
>>>> +        s->username || s->password || s->proxyusername || 
>>>> s->proxypassword)
>>>> +    {
>>> Is !s->sslverify negative because that setting is true by default?
>> Yes, exactly.  If it's false, you'd need to override it (and you can't
>> do that through a plain filename).
> I think this is not the only case in this series, but I'm not very
> comfortable with the idea that this condition and the default value of
> the setting are implicity dependent on each other. If you change one and
> forget to change the other things will break.

Well, yes, but...

> I understand that the default value is never supposed to change so in
> practice I don't see this breaking,


>                                     but is it perhaps worth adding tests
> for all these cases?

In theory, sure.  In practice, adding a curl test case seems hard.

Well, I could connect to, I don't know, qemu.org or something and then
just test things there (with the index used as a raw image), but if I
add one test for the curl protocol, nobody is ever going to run them...
And in theory, that's not how a curl test should work.  In theory, you'd
expect the user to set up a localhost server with some known root
directory and then _make_test_img etc. would set up images there.  But
that way, really nobody is ever going to run them.

And just adding a test for all protocols that then accesses qemu.org
feels somehow wrong, too...  Maybe if I add it to a network group, that
wouldn't feel so bad.

Also, adding macros for the default values could help, I think.


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