Re: [Qemu-devel] [PATCH RFC 3/3] block/nfs: switch to error_init_local

[Eric Blake]

On 06/16/2015 06:53 AM, Michael S. Tsirkin wrote:
> We probably should just switch everyone, this is
> just to demonstrate the API usage.
> 
> Signed-off-by: Michael S. Tsirkin <address@hidden>
> ---
>  block/nfs.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

And indeed this is the reason things are still at RFC level.  I like the
idea.  It doesn't change anything for a bug-free program, but where we
DO have a bug, we now get a stacktrace that aborts as soon as possible
rather than delaying to the propagation point and losing some information.

> 
> diff --git a/block/nfs.c b/block/nfs.c
> index ca9e24e..de4b8c3 100644
> --- a/block/nfs.c
> +++ b/block/nfs.c
> @@ -385,7 +385,7 @@ static int nfs_file_open(BlockDriverState *bs, QDict 
> *options, int flags,
>      NFSClient *client = bs->opaque;
>      int64_t ret;
>      QemuOpts *opts;
> -    Error *local_err = NULL;
> +    Error *local_err = error_init_local(errp);

Should be a fairly mechanical patch to catch all the spots; although
there are multiple spellings (not all callers name it local_err).

-- 
Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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