Re: [Qemu-devel] [PATCH v3 RFC] block/vxhs: Initial commit to add Veritas HyperScale VxHS block device support

[Kevin Wolf]

Am 15.08.2016 um 12:20 hat Daniel P. Berrange geschrieben:
> On Sat, Aug 13, 2016 at 09:35:12PM -0700, Ashish Mittal wrote:
> > +/*
> > + * vxhs_parse_uri: Parse the incoming URI and populate *conf with the
> > + * vdisk_id, and all the host(s) information. Host at index 0 is local 
> > storage
> > + * agent and the rest, reflection target storage agents. The local storage
> > + * agent ip is the efficient internal address in the uri, e.g. 192.168.0.2.
> > + * The local storage agent address is stored at index 0. The reflection 
> > target
> > + * ips, are the E-W data network addresses of the reflection node agents, 
> > also
> > + * extracted from the uri.
> > + */
> > +static int vxhs_parse_uri(BlockdevOptionsVxHS *conf,
> > +                               const char *filename)
> 
> Delete this method entirely. We should not be adding URI syntax for any new
> block driver. The QAPI schema syntax is all we need.

I disagree. URI syntax is nice for human users.

However, you should use the proper interfaces to implement this, which
is .bdrv_parse_filename(). This is a function that gets a string and
converts it into a QDict, which is then passed to .bdrv_open(). So it
uses exactly the same code path in .bdrv_open() as if used directly with
QAPI.

Kevin