[Qemu-devel] Re: [PATCH] set proper migration status on ->write error (v4)

[Luiz Capitulino <lcapitulino@redhat.com>]

On Tue, 13 Jul 2010 14:30:22 -0300
Marcelo Tosatti <mtosatti@redhat.com> wrote:

> 
> If ->write fails, declare migration status as MIG_STATE_ERROR.
> 
> Also, in buffered_file.c, ->close the object in case of an
> error.
> 
> Fixes "migrate -d "exec:dd of=file", where dd fails to open file.
> 
> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
> 
> diff --git a/buffered_file.c b/buffered_file.c
> index 54dc6c2..be147d6 100644
> --- a/buffered_file.c
> +++ b/buffered_file.c
> @@ -222,8 +222,10 @@ static void buffered_rate_tick(void *opaque)
>  {
>      QEMUFileBuffered *s = opaque;
>  
> -    if (s->has_error)
> +    if (s->has_error) {
> +        buffered_close(s);
>          return;
> +    }
>  
>      qemu_mod_timer(s->timer, qemu_get_clock(rt_clock) + 100);
>  
> diff --git a/migration.c b/migration.c
> index b49964c..f8e6325 100644
> --- a/migration.c
> +++ b/migration.c
> @@ -316,8 +316,14 @@ ssize_t migrate_fd_put_buffer(void *opaque, const void *data, size_t size)
>      if (ret == -1)
>          ret = -(s->get_error(s));
>  
> -    if (ret == -EAGAIN)
> +    if (ret == -EAGAIN) {
>          qemu_set_fd_handler2(s->fd, NULL, NULL, migrate_fd_put_notify, s);
> +    } else if (ret < 0) {
> +        if (s->mon) {
> +            monitor_resume(s);

s/monitor_resume(s)/monitor_resume(s->mon)

> +        }
> +        s->state = MIG_STATE_ERROR;
> +    }
>  
>      return ret;
>  }
>