netdev - Re: [PATCH v2 iproute2-next 3/6] rdma: Add CM

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Message-ID: <20180326223033.GK15554@ziepe.ca>
Date:   Mon, 26 Mar 2018 16:30:33 -0600
From:   Jason Gunthorpe <jgg@...pe.ca>
To:     Steve Wise <swise@...ngridcomputing.com>
Cc:     David Ahern <dsahern@...il.com>, leon@...nel.org,
        stephen@...workplumber.org, netdev@...r.kernel.org,
        linux-rdma@...r.kernel.org
Subject: Re: [PATCH v2 iproute2-next 3/6] rdma: Add CM_ID resource tracking
 information

On Mon, Mar 26, 2018 at 04:34:44PM -0500, Steve Wise wrote:
> 
> On 3/26/2018 4:15 PM, Jason Gunthorpe wrote:
> > On Mon, Mar 26, 2018 at 09:30:41AM -0500, Steve Wise wrote:
> >>
> >> On 3/26/2018 9:17 AM, David Ahern wrote:
> >>> On 2/27/18 9:07 AM, Steve Wise wrote:
> >>>> diff --git a/rdma/rdma.h b/rdma/rdma.h
> >>>> index 5809f70..e55205b 100644
> >>>> +++ b/rdma/rdma.h
> >>>> @@ -18,10 +18,12 @@
> >>>>  #include <libmnl/libmnl.h>
> >>>>  #include <rdma/rdma_netlink.h>
> >>>>  #include <time.h>
> >>>> +#include <net/if_arp.h>
> >>>>  
> >>>>  #include "list.h"
> >>>>  #include "utils.h"
> >>>>  #include "json_writer.h"
> >>>> +#include <rdma/rdma_cma.h>
> >>>>  
> >>> did you forget to add rdma_cma.h? I don't see that file in my repo.
> >> It is provided by the rdma-core package, upon which rdma tool now
> >> depends for the rdma_port_space enum.
> > It is a kernel bug that enum is not in an include/uapi/rdma header
> >
> > Fix it there and don't try to use rdma-core headers to get kernel ABI.
> >
> > Jason
> 
> I wish you'd commented on this just a little sooner.  I just resent v3
> of this series... with rdma_cma.h included. :)
> 
> How about the restrack/nldev code just translates the port space from
> enum rdma_port_space to a new ABI enum, say nldev_rdma_port_space, that
> i add to rdma_netlink.h?  I'd hate to open the can of worms of trying to
> split rdma_cma.h into uabi and no uabi headers. :(

If port space is already part of the ABI there isn't much reason to
translate it.

You just need to pick the right header to put it in, since it is a verbs
define it doesn't belong in the netlink header.

Jason