Re: [PATCH 1/2] keyval: accept escaped commas in implied option

[Paolo Bonzini <pbonzini@redhat.com>]

On 11/11/20 11:53, Daniel P. Berrangé wrote:
> On Wed, Nov 11, 2020 at 05:45:20AM -0500, Paolo Bonzini wrote:
>> This is used with the weirdly-named device "SUNFD,two", so accepting it
>> is also a preparatory step towards keyval-ifying -device and the
>> device_add monitor command.  But in general it is an unexpected wart
>> of the keyval syntax and leads to suboptimal errors compared to QemuOpts:
> 
> If "SUNFD,two" is the only wierdly named device, can we just rename
> it to get rid of the comma, and then put validation in QOM to forbid
> commas entirely.  eg rename it to "SUNFD-two"
> 
> Just have a targetted hack in vl.c to replace any use of "SUNFD,two"
> with the new name before parsing in keyval, if we care enough about
> back compat for this niche hardware device.

See the rest of the commit message.  The patch improves error messages 
as a side effect, and in my opinion also the code.  So it can be 
considered independent of the original reason why it was developed.

Paolo