10:18 a.m.
I want to change the driver->open function so that as well as declining
a name (returning -1 as now), it may also indicate that it accepts the
name, but there is an error opening the name (-2). virConnectOpen fails
in this second case, rather than going on and trying the next driver in
sequence.
Rich.
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11:05 a.m.
On Wed, Feb 28, 2007 at 04:18:45PM +0000, Richard W.M. Jones wrote:
I want to change the driver->open function so that as well as declining
a name (returning -1 as now), it may also indicate that it accepts the
name, but there is an error opening the name (-2). virConnectOpen fails
in this second case, rather than going on and trying the next driver in
sequence.
This is all sane - I've certainly seen some really odd problems before
from not being able to detect the difference between an operation not
being supported, vs supported but failed. When we merge the Xen drivers
into one those will go away, and thus addresses the open() case, so
I'll commit it unless anyone objects.
Regards,
Dan
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3:38 a.m.
On Wed, 2007-02-28 at 16:18 +0000, Richard W.M. Jones wrote:
+ case VIR_DRV_OPEN_ERROR: goto failed;
+ case VIR_DRV_OPEN_DECLINED:
+ /*
+ * For a default connect to Xen make sure we manage to contact
+ * all related drivers.
+ */
+ if (for_xen &&
+ strncasecmp(virDriverTab[i]->name, "xen", 3) == 0
&&
+ virDriverTab[i]->no != VIR_DRV_XEN_PROXY)
+ goto failed;
+ break;
Are there no current cases where we should return VIR_DRV_OPEN_ERROR?
Also, can we change the existing open methods to use DECLINED? I was
confused for a minute because I presumed ERROR was -1 ...
Cheers,
Mark.
7:57 a.m.
New subject: [Libvir] Patch: driver->open functions return declined or error status
Mark McLoughlin wrote:
On Wed, 2007-02-28 at 16:18 +0000, Richard W.M. Jones wrote:
> + case VIR_DRV_OPEN_ERROR: goto failed;
> + case VIR_DRV_OPEN_DECLINED:
> + /*
> + * For a default connect to Xen make sure we manage to contact
> + * all related drivers.
> + */
> + if (for_xen &&
> + strncasecmp(virDriverTab[i]->name, "xen", 3) == 0
&&
> + virDriverTab[i]->no != VIR_DRV_XEN_PROXY)
> + goto failed;
> + break;
Are there no current cases where we should return VIR_DRV_OPEN_ERROR?
Also, can we change the existing open methods to use DECLINED? I was
confused for a minute because I presumed ERROR was -1 ...
Oh definitely. I didn't claim that I'd fixed all the other drivers :-)
Rich.
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Daniel P. Berrange -
Mark McLoughlin -
Richard W.M. Jones