Re: [PATCH 17/19] xfsprogs: disable truncating of files

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On 4/13/16 11:23 AM, Jan Tulak wrote:
> 
> 
> On Wed, Apr 13, 2016 at 6:17 PM, Eric Sandeen <sandeen@xxxxxxxxxxx <mailto:sandeen@xxxxxxxxxxx>> wrote:
> 
>     On 4/13/16 10:08 AM, Jan Tulak wrote:
> 
>     ...
> 
>     > All right​, I will keep the O_TRUNC there. However, should it
>     > truncate the file every time, or should we offer a way how to avoid
>     > the file truncating? Until now, mkfs behaved differently based on
>     > whether -d file was given, or not. Your explanation suggests that we
>     > should truncate every time, right?
> 
>     There are probably valid reasons to keep size as well as to truncate;
>     it's not immediately clear to me how we should handle it.
> 
>     Honestly, at this point, in the interest of getting the other fixes in,
>     I think I might rather see the truncating behavior unchanged from what
>     we have today; we can tackle that as a separate problem at a later date.
> 
>     What do you think?
> 
> ​For keeping the size, the easiest way might be to implicitly set
> xi.dsize (or whatever) to the current size. Of course, after a check
> for -d file,name,size combo. AFAIK (without looking to the code, I'm
> just ending for today and in the middle of shutting everything down
> :-) ), we ​do the truncation after the combo check. So this should be
> no big issue... I will look on this tomorrow, to know better.

I'm just saying; let's not change current behavior without good reason.
If it requires a lot of discussion, let's keep current behavior in all
cases for now, so that we can move the larger patchset forward.

Thanks,
-Eric

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