netdev - Re: [PATCH 0/3] IB/ipoib: Use dev_port to disambiguate port numbers

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Date:   Thu, 30 Aug 2018 11:42:46 +0300
From:   Arseny Maslennikov <ar@...msu.ru>
To:     Leon Romanovsky <leon@...nel.org>
Cc:     linux-rdma@...r.kernel.org, Doug Ledford <dledford@...hat.com>,
        Jason Gunthorpe <jgg@...pe.ca>, netdev@...r.kernel.org
Subject: Re: [PATCH 0/3] IB/ipoib: Use dev_port to disambiguate port numbers

On Thu, Aug 30, 2018 at 08:43:30AM +0300, Leon Romanovsky wrote:
> On Wed, Aug 29, 2018 at 12:01:14AM +0300, Arseny Maslennikov wrote:
> > Pre-3.15 userspace had trouble distinguishing different ports
> > of a NIC on a single PCI bus/device/function. To solve this,
> > a sysfs field `dev_port' was introduced quite a while ago
> > (commit v3.14-rc3-739-g3f85944fe207), and some relevant device
> > drivers were fixed to use it, but not in case of IPoIB.
> >
> > The convention for some reason never got documented in the kernel, but
> > was immediately adopted by userspace (notably udev[1][2], biosdevname[3])
> >
> > 3/3 documents the sysfs field — that's why I'm CC-ing netdev.
> >
> > This series was tested on and applies to 4.19-rc1.
> >
> > [1] https://lists.freedesktop.org/archives/systemd-devel/2014-June/020788.html
> > [2] https://lists.freedesktop.org/archives/systemd-devel/2014-July/020804.html
> > [3] https://github.com/CloudAutomationNTools/biosdevname/blob/c795d51dd93a5309652f0d635f12a3ecfabfaa72/src/eths.c#L38
> >
> > Arseny Maslennikov (3):
> >   IB/ipoib: Use dev_port to expose network interface port numbers
> >   IB/ipoib: Stop using dev_id to expose port numbers
> 
> I completely agree with previous Yuval's comment, it makes no sense to
> start separate commits for every line.
> 
> Please decide what is best and right behavior and do it, instead of
> pushing it up to be the maintainer's problem.
> 

No problem; will squash those two in v2, then.

> Thanks
> 
> >   Documentation/ABI: document /sys/class/net/*/dev_port
> >
> >  Documentation/ABI/testing/sysfs-class-net | 10 ++++++++++
> >  drivers/infiniband/ulp/ipoib/ipoib_main.c |  2 +-
> >  2 files changed, 11 insertions(+), 1 deletion(-)
> >
> > --
> > 2.18.0
> >



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