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Re: [Qemu-devel] Ignoring errno makes QMP errors suck
From: |
Luiz Capitulino |
Subject: |
Re: [Qemu-devel] Ignoring errno makes QMP errors suck |
Date: |
Mon, 26 Mar 2012 11:33:12 -0300 |
On Mon, 26 Mar 2012 16:04:26 +0200
Kevin Wolf <address@hidden> wrote:
> >> Does the patch that you mentioned add a generic way for adding an
> >> (converted) errno to QMP errors? Or does it split up existing errors
> >> into more and finer grained errors?
> >
> > The latter. The QMP errors have to be added manually. But it's just a matter
> > of time to get the most used errnos added.
>
> Your PermissionDenied example doesn't really do this. It is a generic
> error message that may occur in multiple contexts, right? So in one
> context you may need a file name as additional information, in another
> context permission for something completely different may be missing
> (especially if you include EPERM in the same error).
Yes, but it's not a severe problem. Not yet. Because most of the time the
error context can be inferred from the command's context. Say, you fail to
create a file where only one file could be created.
But yes, we need to add a way for errors to accept optional parameters.
I have a series that's almost done that moves all errors to a qapi-error.json
file and auto-generates the QErrors tables. Maybe that's a first step towards
more flexible errors.
> I think 'OpenFileFailed' is not too bad, it's just missing a field that
> gives the detail 'PermissionDenied'. I'm not sure if having
> 'PermissionDenied' as the top-level error object is the best idea.
I think the end result is the same, but I prefer PermissionDenied as the
top level because it's slightly simpler.
- [Qemu-devel] Ignoring errno makes QMP errors suck, Kevin Wolf, 2012/03/26
- Re: [Qemu-devel] Ignoring errno makes QMP errors suck, Luiz Capitulino, 2012/03/26
- Re: [Qemu-devel] Ignoring errno makes QMP errors suck, Kevin Wolf, 2012/03/26
- Re: [Qemu-devel] Ignoring errno makes QMP errors suck, Luiz Capitulino, 2012/03/26
- Re: [Qemu-devel] Ignoring errno makes QMP errors suck, Anthony Liguori, 2012/03/26
- Re: [Qemu-devel] Ignoring errno makes QMP errors suck, Kevin Wolf, 2012/03/26
- Re: [Qemu-devel] Ignoring errno makes QMP errors suck,
Luiz Capitulino <=
- Re: [Qemu-devel] Ignoring errno makes QMP errors suck, Kevin Wolf, 2012/03/26
- Re: [Qemu-devel] Ignoring errno makes QMP errors suck, Luiz Capitulino, 2012/03/26
- Re: [Qemu-devel] Ignoring errno makes QMP errors suck, Kevin Wolf, 2012/03/26
Re: [Qemu-devel] Ignoring errno makes QMP errors suck, Anthony Liguori, 2012/03/26
- Re: [Qemu-devel] Ignoring errno makes QMP errors suck, Kevin Wolf, 2012/03/26
- Re: [Qemu-devel] Ignoring errno makes QMP errors suck, Anthony Liguori, 2012/03/26
- Re: [Qemu-devel] Ignoring errno makes QMP errors suck, Kevin Wolf, 2012/03/26
- Re: [Qemu-devel] Ignoring errno makes QMP errors suck, Anthony Liguori, 2012/03/26
- Re: [Qemu-devel] Ignoring errno makes QMP errors suck, Kevin Wolf, 2012/03/26
- Re: [Qemu-devel] Ignoring errno makes QMP errors suck, Anthony Liguori, 2012/03/26