Re: [Qemu-devel] [RFC PATCH 10/17] COLO ctl: introduce is_slave() and is_master()

[Dr. David Alan Gilbert]

* Yang Hongyang (address@hidden) wrote:
> is_slaver is to determine whether the QEMU instance is a
> slaver(migration target) at runtime.
> is_master is to determine whether the QEMU instance is a
> master(migration starter) at runtime.
> This 2 APIs will be used later.

Since the names are made global in patch 15, I think it's best to
do it here, but also use a more specific name for them, like
colo_is_master.

Dave

> Signed-off-by: Yang Hongyang <address@hidden>
> ---
>  migration-colo.c | 11 +++++++++++
>  1 file changed, 11 insertions(+)
> 
> diff --git a/migration-colo.c b/migration-colo.c
> index 802f8b0..2699e77 100644
> --- a/migration-colo.c
> +++ b/migration-colo.c
> @@ -187,6 +187,12 @@ static const QEMUFileOps colo_read_ops = {
>  
>  /* save */
>  
> +static __attribute__((unused)) bool is_master(void)
> +{
> +    MigrationState *s = migrate_get_current();
> +    return (s->state == MIG_STATE_COLO);
> +}
> +
>  static void *colo_thread(void *opaque)
>  {
>      MigrationState *s = opaque;
> @@ -275,6 +281,11 @@ void colo_init_checkpointer(MigrationState *s)
>  
>  static Coroutine *colo;
>  
> +static __attribute__((unused)) bool is_slave(void)
> +{
> +    return colo != NULL;
> +}
> +
>  /*
>   * return:
>   * 0: start a checkpoint
> -- 
> 1.9.1
> 
--
Dr. David Alan Gilbert / address@hidden / Manchester, UK