Re: [PATCH] migration: use migration_is_active to represent active state

["Dr. David Alan Gilbert" <dgilbert@redhat.com>]

* Wei Yang (richardw.yang@linux.intel.com) wrote:
> Wrap the check into a function to make it easy to read.
> 
> Signed-off-by: Wei Yang <richardw.yang@linux.intel.com>

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

> ---
>  include/migration/misc.h |  1 +
>  migration/migration.c    | 12 ++++++++----
>  2 files changed, 9 insertions(+), 4 deletions(-)
> 
> diff --git a/include/migration/misc.h b/include/migration/misc.h
> index 5cdbabd094..42d6abc920 100644
> --- a/include/migration/misc.h
> +++ b/include/migration/misc.h
> @@ -61,6 +61,7 @@ void migration_object_init(void);
>  void migration_shutdown(void);
>  void qemu_start_incoming_migration(const char *uri, Error **errp);
>  bool migration_is_idle(void);
> +bool migration_is_active(MigrationState *);
>  void add_migration_state_change_notifier(Notifier *notify);
>  void remove_migration_state_change_notifier(Notifier *notify);
>  bool migration_in_setup(MigrationState *);
> diff --git a/migration/migration.c b/migration/migration.c
> index 43fd8297ef..4c066fc85c 100644
> --- a/migration/migration.c
> +++ b/migration/migration.c
> @@ -1529,8 +1529,7 @@ static void migrate_fd_cleanup(MigrationState *s)
>          qemu_fclose(tmp);
>      }
>  
> -    assert((s->state != MIGRATION_STATUS_ACTIVE) &&
> -           (s->state != MIGRATION_STATUS_POSTCOPY_ACTIVE));
> +    assert(!migration_is_active(s));
>  
>      if (s->state == MIGRATION_STATUS_CANCELLING) {
>          migrate_set_state(&s->state, MIGRATION_STATUS_CANCELLING,
> @@ -1690,6 +1689,12 @@ bool migration_is_idle(void)
>      return false;
>  }
>  
> +bool migration_is_active(MigrationState *s)
> +{
> +    return (s->state == MIGRATION_STATUS_ACTIVE ||
> +            s->state == MIGRATION_STATUS_POSTCOPY_ACTIVE);
> +}
> +
>  void migrate_init(MigrationState *s)
>  {
>      /*
> @@ -3226,8 +3231,7 @@ static void *migration_thread(void *opaque)
>  
>      trace_migration_thread_setup_complete();
>  
> -    while (s->state == MIGRATION_STATUS_ACTIVE ||
> -           s->state == MIGRATION_STATUS_POSTCOPY_ACTIVE) {
> +    while (migration_is_active(s)) {
>          int64_t current_time;
>  
>          if (urgent || !qemu_file_rate_limit(s->to_dst_file)) {
> -- 
> 2.17.1
> 
--
Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK