Re: [PATCH 09/14] error: Use error_setg_file_open() for simplicity and consistency

["Dr. David Alan Gilbert" <dave@xxxxxxxxxxx>]

* Markus Armbruster (armbru@xxxxxxxxxx) wrote:
> "Dr. David Alan Gilbert" <dave@xxxxxxxxxxx> writes:
> 
> > * Markus Armbruster (armbru@xxxxxxxxxx) wrote:
> >> Replace
> >> 
> >>     error_setg_errno(errp, errno, MSG, FNAME);
> >> 
> >> by
> >> 
> >>     error_setg_file_open(errp, errno, FNAME);
> >> 
> >> where MSG is "Could not open '%s'" or similar.
> >> 
> >> Also replace equivalent uses of error_setg().
> >> 
> >> A few messages lose prefixes ("net dump: ", "SEV: ", __func__ ": ").
> >> We could put them back with error_prepend().  Not worth the bother.
> >
> > Yeh, I guess you could just do it with another macro using
> > the same internal function just with string concatenation.
> 
> I'm no fan of such prefixes.  A sign of developers not caring enough to
> craft a good error message for *users*.  *Especially* in the case of
> __func__.
> 
> The error messages changes in question are:
> 
>     net dump: can't open DUMP-FILE: REASON
>     Could not open 'DUMP-FILE': REASON
> 
>     SEV: Failed to open SEV-DEVICE: REASON
>     Could not open 'SEV-DEVICE': REASON
> 
>     sev_common_kvm_init: Failed to open SEV_DEVICE 'REASON'
>     Could not open 'SEV-DEVICE': REASON
> 
> I think these are all improvements, and the loss of the prefix is fine.

Yeh, although I find the error messages aren't just for users;
they're often for the first dev to see it to guess which other
dev to pass the problem to, so a hint about where it's coming
from can be useful.

Dave

> >> Signed-off-by: Markus Armbruster <armbru@xxxxxxxxxx>
> >
> > Reviewed-by: Dr. David Alan Gilbert <dave@xxxxxxxxxxx>
> 
> Thanks!
> 
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