[2/3] migration/savevm: split qemu_savevm_state_complete_precopy() into two parts

This is a preparation patch for further cleanup.

No functional change, just wrap two major part of
qemu_savevm_state_complete_precopy() into function.

Signed-off-by: Wei Yang <richardw.yang@linux.intel.com>
---
 migration/savevm.c | 66 ++++++++++++++++++++++++++++++++++------------
 1 file changed, 49 insertions(+), 17 deletions(-)

* Wei Yang (richardw.yang@linux.intel.com) wrote:
> This is a preparation patch for further cleanup.
> 
> No functional change, just wrap two major part of
> qemu_savevm_state_complete_precopy() into function.
> 
> Signed-off-by: Wei Yang <richardw.yang@linux.intel.com>

Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>

> ---
>  migration/savevm.c | 66 ++++++++++++++++++++++++++++++++++------------
>  1 file changed, 49 insertions(+), 17 deletions(-)
> 
> diff --git a/migration/savevm.c b/migration/savevm.c
> index becedcc1c6..c41e13e322 100644
> --- a/migration/savevm.c
> +++ b/migration/savevm.c
> @@ -1246,23 +1246,12 @@ void qemu_savevm_state_complete_postcopy(QEMUFile *f)
>      qemu_fflush(f);
>  }
>  
> -int qemu_savevm_state_complete_precopy(QEMUFile *f, bool iterable_only,
> -                                       bool inactivate_disks)
> +static
> +int qemu_savevm_state_complete_precopy_iterable(QEMUFile *f, bool in_postcopy,
> +                                                bool iterable_only)
>  {
> -    QJSON *vmdesc;
> -    int vmdesc_len;
>      SaveStateEntry *se;
>      int ret;
> -    bool in_postcopy = migration_in_postcopy();
> -    Error *local_err = NULL;
> -
> -    if (precopy_notify(PRECOPY_NOTIFY_COMPLETE, &local_err)) {
> -        error_report_err(local_err);
> -    }
> -
> -    trace_savevm_state_complete_precopy();
> -
> -    cpu_synchronize_all_states();
>  
>      QTAILQ_FOREACH(se, &savevm_state.handlers, entry) {
>          if (!se->ops ||
> @@ -1291,9 +1280,18 @@ int qemu_savevm_state_complete_precopy(QEMUFile *f, bool iterable_only,
>          }
>      }
>  
> -    if (iterable_only) {
> -        goto flush;
> -    }
> +    return 0;
> +}
> +
> +static
> +int qemu_savevm_state_complete_precopy_non_iterable(QEMUFile *f,
> +                                                    bool in_postcopy,
> +                                                    bool inactivate_disks)
> +{
> +    QJSON *vmdesc;
> +    int vmdesc_len;
> +    SaveStateEntry *se;
> +    int ret;
>  
>      vmdesc = qjson_new();
>      json_prop_int(vmdesc, "page_size", qemu_target_page_size());
> @@ -1353,6 +1351,40 @@ int qemu_savevm_state_complete_precopy(QEMUFile *f, bool iterable_only,
>      }
>      qjson_destroy(vmdesc);
>  
> +    return 0;
> +}
> +
> +int qemu_savevm_state_complete_precopy(QEMUFile *f, bool iterable_only,
> +                                       bool inactivate_disks)
> +{
> +    int ret;
> +    Error *local_err = NULL;
> +    bool in_postcopy = migration_in_postcopy();
> +
> +    if (precopy_notify(PRECOPY_NOTIFY_COMPLETE, &local_err)) {
> +        error_report_err(local_err);
> +    }
> +
> +    trace_savevm_state_complete_precopy();
> +
> +    cpu_synchronize_all_states();
> +
> +    ret = qemu_savevm_state_complete_precopy_iterable(f, in_postcopy,
> +                                                      iterable_only);
> +    if (ret) {
> +        return ret;
> +    }
> +
> +    if (iterable_only) {
> +        goto flush;
> +    }
> +
> +    ret = qemu_savevm_state_complete_precopy_non_iterable(f, in_postcopy,
> +                                                          inactivate_disks);
> +    if (ret) {
> +        return ret;
> +    }
> +
>  flush:
>      qemu_fflush(f);
>      return 0;
> -- 
> 2.17.1
> 
--
Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK