From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dotan Barak Subject: Re: positive or negative error values from vendor library for immediate errors? Date: Fri, 12 Dec 2014 13:56:31 +0200 Message-ID: <548AD7EF.1030102@gmail.com> References: Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Sender: linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Devesh Sharma , "linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org" List-Id: linux-rdma@vger.kernel.org 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