Re: [Xen-devel] [PATCH v5 3/7] libxl/libxl_domain_info: Log if domain not found.

[Ian Murray <murrayie@xxxxxxxxxxx>]

On 03/04/15 21:02, Konrad Rzeszutek Wilk wrote:
> If we cannot find the domain - log an error (and still
> continue returning an error).
Forgive me if I am misunderstanding the effect of this patch (I tried to
find the original rationale but failed). If the effect is that commands
such as xl domid will cause a log entry when the specified domain
doesn't exist, I would suggest that's going to be a problem for people
that use that or similar commands to tell if a domain is present or
still alive. I use it as part of a back-up script to make sure a domain
shutdown before the script continues. I suspect many other people will
be doing something similar.

Apologies if I have the wrong end of the stick!

Thanks,

Ian.


>
> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
> Acked-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
> ---
>  tools/libxl/libxl.c | 6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
>
> diff --git a/tools/libxl/libxl.c b/tools/libxl/libxl.c
> index c0e9cfe..8753e27 100644
> --- a/tools/libxl/libxl.c
> +++ b/tools/libxl/libxl.c
> @@ -698,8 +698,10 @@ int libxl_domain_info(libxl_ctx *ctx, libxl_dominfo 
> *info_r,
>          LIBXL__LOG_ERRNO(ctx, LIBXL__LOG_ERROR, "getting domain info list");
>          return ERROR_FAIL;
>      }
> -    if (ret==0 || xcinfo.domain != domid) return ERROR_DOMAIN_NOTFOUND;
> -
> +    if (ret==0 || xcinfo.domain != domid) {
> +        LIBXL__LOG_ERRNO(ctx, LIBXL__LOG_ERROR, "Domain %d not found!", 
> domid);
> +        return ERROR_DOMAIN_NOTFOUND;
> +    }
>      if (info_r)
>          xcinfo2xlinfo(ctx, &xcinfo, info_r);
>      return 0;


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