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Re: [libvirt] [PATCH 3/6] Added new public API virDomainMigrateStartPostCopy



On Wed, Sep 24, 2014 at 14:45:02 +0200, Jiri Denemark wrote:
> On Tue, Sep 23, 2014 at 16:09:58 +0200, Cristian Klein wrote:
> > The user first start migration using the `VIR_MIGRATE_POSTCOPY` flag,
> > then calls `virDomainMigrateStartPostCopy` asynchronously to switch from
> > pre-copy to post-copy.
> > 
> > Signed-off-by: Cristian Klein <cristian klein cs umu se>
> > ---
> >  include/libvirt/libvirt.h.in |  2 ++
> >  src/driver.h                 |  4 ++++
> >  src/libvirt.c                | 37 +++++++++++++++++++++++++++++++++++++
> >  src/libvirt_public.syms      |  5 +++++
> >  4 files changed, 48 insertions(+)
> > 
> > diff --git a/include/libvirt/libvirt.h.in b/include/libvirt/libvirt.h.in
> > index bdc33c6..eabedfa 100644
> > --- a/include/libvirt/libvirt.h.in
> > +++ b/include/libvirt/libvirt.h.in
> > @@ -1346,6 +1346,8 @@ int virDomainMigrateToURI3(virDomainPtr domain,
> >                             unsigned int nparams,
> >                             unsigned int flags);
> >  
> > +int virDomainMigrateStartPostCopy (virDomainPtr domain);
> > +
> >  int virDomainMigrateSetMaxDowntime (virDomainPtr domain,
> >                                      unsigned long long downtime,
> >                                      unsigned int flags);
> > diff --git a/src/driver.h b/src/driver.h
> > index bb748c4..6866ccd 100644
> > --- a/src/driver.h
> > +++ b/src/driver.h
> > @@ -1212,6 +1212,9 @@ typedef int
> >                                    virDomainStatsRecordPtr **retStats,
> >                                    unsigned int flags);
> >  
> > +typedef int
> > +(*virDrvDomainMigrateStartPostCopy)(virDomainPtr domain);
> > +
> >  typedef struct _virDriver virDriver;
> >  typedef virDriver *virDriverPtr;
> >  
> > @@ -1435,6 +1438,7 @@ struct _virDriver {
> >      virDrvNodeGetFreePages nodeGetFreePages;
> >      virDrvConnectGetDomainCapabilities connectGetDomainCapabilities;
> >      virDrvConnectGetAllDomainStats connectGetAllDomainStats;
> > +    virDrvDomainMigrateStartPostCopy domainMigrateStartPostCopy;
> >  };
> >  
> >  
> > diff --git a/src/libvirt.c b/src/libvirt.c
> > index 33aeafa..e685da2 100644
> > --- a/src/libvirt.c
> > +++ b/src/libvirt.c
> > @@ -17803,6 +17803,43 @@ virDomainMigrateSetCompressionCache(virDomainPtr domain,
> >  
> >  
> >  /**
> > + * virDomainMigrateStartPostCopy:
> > + * @domain: a domain object
> > + *
> > + * Starts post-copy migration. This function has to be called while
> > + * migration (initially pre-copy) is in progress. The migration operation
> > + * must be called with the VIR_MIGRATE_POSTCOPY flag.
> > + *
> > + * Returns 0 in case of success, -1 otherwise.
> > + */
> > +int
> > +virDomainMigrateStartPostCopy(virDomainPtr domain)

Oops, I forgot to mention we should add unsigned int flags parameter for
this API just in case we need it in the future.

Jirka


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