[libvirt] [PATCH] metadata: track title edits across libvirtd restart

[Martin Kletzander]

On Tue, Jul 22, 2014 at 01:11:03PM -0600, Eric Blake wrote:
>https://bugzilla.redhat.com/show_bug.cgi?id=1122205
>
>Although the edits were changing in-memory XML, it was not flushed
>to disk; so unless some other action changes XML, a libvirtd restart
>would lose the changed information.
>

And there are more places like that.  Take a
qemuDomainSetNumaParameters() for example.  Would it be possible (as
in "not devastatingly hard" to create a syntax-check rule for
*_driver.c files (only those that are applicable, mostly stateful)
that would check if virCheckFlags is called with
VIR_DOMAIN_AFFECT_LIVE and if yes, then that function would have to
call virDomainSaveStatus() as well?

[...]
>diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
>index 4b00280..6ed6155 100644
>--- a/src/conf/domain_conf.c
>+++ b/src/conf/domain_conf.c
[...]
>@@ -19753,9 +19757,12 @@ virDomainObjSetMetadata(virDomainObjPtr vm,
>                                         &persistentDef) < 0)
>         return -1;
>
>-    if (flags & VIR_DOMAIN_AFFECT_LIVE)
>+    if (flags & VIR_DOMAIN_AFFECT_LIVE) {
>         if (virDomainDefSetMetadata(vm->def, type, metadata, key, uri) < 0)
>             return -1;

One empty line right here would perfectly go with the rest of the
function ;)

ACK with or without this change,

Martin
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