netdev - Re: [patch net-next v2 00/10] Add support for resource abstraction

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Date:   Wed, 3 Jan 2018 20:05:44 +0200
From:   Arkadi Sharshevsky <arkadis@...lanox.com>
To:     David Ahern <dsa@...ulusnetworks.com>,
        Jiri Pirko <jiri@...nulli.us>, netdev@...r.kernel.org,
        roopa@...ulusnetworks.com
Cc:     davem@...emloft.net, mlxsw@...lanox.com, andrew@...n.ch,
        vivien.didelot@...oirfairelinux.com, f.fainelli@...il.com,
        michael.chan@...adcom.com, ganeshgr@...lsio.com,
        saeedm@...lanox.com, matanb@...lanox.com, leonro@...lanox.com,
        idosch@...lanox.com, jakub.kicinski@...ronome.com, ast@...nel.org,
        daniel@...earbox.net, simon.horman@...ronome.com,
        pieter.jansenvanvuuren@...ronome.com, john.hurley@...ronome.com,
        alexander.h.duyck@...el.com, linville@...driver.com,
        gospo@...adcom.com, steven.lin1@...adcom.com, yuvalm@...lanox.com,
        ogerlitz@...lanox.com
Subject: Re: [patch net-next v2 00/10] Add support for resource abstraction



On 01/02/2018 08:05 PM, David Ahern wrote:
> On 1/1/18 7:58 AM, Arkadi Sharshevsky wrote:
>>
>> Just to summarize the current fixes required:
>>
>> 1. ERIF dpipe table size is reporting wrong size. More precisely the
>>    ERIF table does not take rifs, so it should not be linked to the rif
>>    bank resource (is not part of this patchset, future extension).
>> 2. Extended ACK user-space bug.
>> 3. ABI documentation- Not sure we agreed upon it, Jiri?
>>
>> If I missed something please respond. Nothing of the fixes mentioned
>> above is relevant for this patchset actually.
>>
> 
> Can you fix the userspace command and then we come back to what else is
> needed? Right now, it is hard to tell what is a user space bug and what
> is a kernel space bug.
> 
> For example:
> $ devlink resource set pci/0000:03:00.0 path /kvd/linear size 10000
> $ devlink resource show pci/0000:03:00.0
> pci/0000:03:00.0:
>   name kvd size 245760 size_valid true
>   resources:
>     name linear size 98304 occ 0
>     name hash_double size 60416
>     name hash_single size 87040
> 
> The set command did not fail, yet there is no size_new arg in the output
> like there is for this change:
> 
> $ devlink resource set pci/0000:03:00.0 path /kvd/linear size 0
> $ devlink resource show pci/0000:03:00.0
> pci/0000:03:00.0:
>   name kvd size 245760 size_valid true
>   resources:
>     name linear size 98304 size_new 0 occ 0
>     name hash_double size 60416
>     name hash_single size 87040
> 

As I stated this is a user-space bug which I fixed, and updated my repo
so please pull. Devlink uses mnl,and currently mnl does not support
extended ack. I added support for this in my local ver of libmnl:

https://github.com/arkadis/libmnl.git

On branch master, so you can check it out. Besides this bugs, which were
userspace, can please specify what are the pending problems from your
point of view? Thanks!