Re: positive or negative error values from vendor library for immediate errors?

Dotan Barak
2014-12-12T11:56:31Z

Hi Devesh.

I wish that there was a header that maps the return errors to errno,
to make things much more canonical. But currently we don't have it :(

AFAIK, the guidelines is that kernel code returns negative values
and userspace code should return positive values.

Thanks
Dotan

On 08/12/2014 12:47, Devesh Sharma wrote:
> Hello list,
>
> While reviewing some the vendor library source I found that Mellanox and Pathscale user-space provider library returns positive error number if any immediate error is encountered.
> However, other vendor user-space libraries return negative error numbers.
>
> Is there any guideline on this topic. If not, what is the correct way to do this.
> Taking reference of glibc implementation, I found that it expects negative integer as return value.
>
> Any pointer/reference/guideline will be a great help.
>
> -Regards
> Devesh
> --
> To unsubscribe from this list: send the line "unsubscribe linux-rdma" in
> the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html

--
To unsubscribe from this list: send the line "unsubscribe linux-rdma" in
the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
More majordomo info at http://vger.kernel.org/majordomo-info.html