From: Arseny Maslennikov <ar@cs.msu.ru>
To: linux-rdma@vger.kernel.org
Cc: Arseny Maslennikov <ar@cs.msu.ru>,
Doug Ledford <dledford@redhat.com>,
Jason Gunthorpe <jgg@ziepe.ca>,
netdev@vger.kernel.org
Subject: [PATCH v3 0/3] IB/ipoib: Use dev_port to disambiguate port numbers
Date: Mon, 3 Sep 2018 19:13:13 +0300 [thread overview]
Message-ID: <20180903161316.25121-1-ar@cs.msu.ru> (raw)
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])
1/3 documents the sysfs field — that's why I'm CC-ing netdev.
This series was tested on and applies to 4.19-rc2.
[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
v1->v2: replace a line instead of inserting and then removing.
v2->v3: restore both attributes, output a notice of deprecation to kmsg.
Arseny Maslennikov (3):
Documentation/ABI: document /sys/class/net/*/dev_port
IB/ipoib: Use dev_port to expose network interface port numbers
IB/ipoib: Log sysfs 'dev_id' accesses from userspace
Documentation/ABI/testing/sysfs-class-net | 18 ++++++++++
drivers/infiniband/ulp/ipoib/ipoib_main.c | 40 +++++++++++++++++++++++
2 files changed, 58 insertions(+)
--
2.19.0.rc1
next reply other threads:[~2018-09-03 16:13 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-03 16:13 Arseny Maslennikov [this message]
2018-09-03 16:13 ` [PATCH v3 1/3] Documentation/ABI: document /sys/class/net/*/dev_port Arseny Maslennikov
2018-09-03 16:13 ` [PATCH v3 2/3] IB/ipoib: Use dev_port to expose network interface port numbers Arseny Maslennikov
2018-09-05 13:41 ` Leon Romanovsky
2018-09-03 16:13 ` [PATCH v3 3/3] IB/ipoib: Log sysfs 'dev_id' accesses from userspace Arseny Maslennikov
2018-09-05 13:50 ` Leon Romanovsky
2018-09-06 7:04 ` Arseny Maslennikov
2018-09-06 13:03 ` Leon Romanovsky
2018-09-07 17:14 ` Doug Ledford
2018-09-07 17:28 ` Leon Romanovsky
2018-09-07 20:02 ` Doug Ledford
2018-09-05 15:47 ` Stephen Hemminger
2018-09-06 7:26 ` Arseny Maslennikov
2018-09-06 12:56 ` Leon Romanovsky
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