Re: [Qemu-devel] [RFC PATCH 2/3] block: assign backing relationship in drive-backup

[Paolo Bonzini]

Il 26/06/2013 05:59, Fam Zheng ha scritto:
> Assign source image as the backing hd of target bs, so reading target bs
> gets the point-in-time copy of data from source image.
> 
> Signed-off-by: Fam Zheng <address@hidden>
> ---
>  blockdev.c | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/blockdev.c b/blockdev.c
> index 5e694f3..a1d816e 100644
> --- a/blockdev.c
> +++ b/blockdev.c
> @@ -1504,6 +1504,10 @@ void qmp_drive_backup(const char *device, const char 
> *target,
>          return;
>      }
>  
> +    target_bs->backing_hd = bs;
> +    pstrcpy(target_bs->backing_file, sizeof(target_bs->backing_file),
> +            bs->filename);

backing_format missing.

Paolo

>      backup_start(bs, target_bs, speed, on_source_error, on_target_error,
>                   block_job_cb, bs, &local_err);
>      if (local_err != NULL) {
>