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| author | Arseny Maslennikov <ar@cs.msu.ru> | 2018-09-06 17:51:10 +0300 |
|---|---|---|
| committer | Doug Ledford <dledford@redhat.com> | 2018-09-13 11:47:52 -0400 |
| commit | 4c0b6534c9100c3ad2d69e7dd3562a165a346204 (patch) | |
| tree | 268e69c34130cde288b85192d3f9fa8eafb26f7e | |
| parent | 0e9d2c19bff1d351005afb2f990a913e395ba6d4 (diff) | |
| download | linux-4c0b6534c9100c3ad2d69e7dd3562a165a346204.tar.bz2 | |
Documentation/ABI: document /sys/class/net/*/dev_port
The sysfs field was introduced 4 years ago along with fixes to various
drivers that erroneously used `dev_id' for that purpose, but it was not
properly documented anywhere.
See commit v3.14-rc3-739-g3f85944fe207.
Signed-off-by: Arseny Maslennikov <ar@cs.msu.ru>
Signed-off-by: Doug Ledford <dledford@redhat.com>
| -rw-r--r-- | Documentation/ABI/testing/sysfs-class-net | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-class-net b/Documentation/ABI/testing/sysfs-class-net index 2f1788111cd9..ec2232f6a949 100644 --- a/Documentation/ABI/testing/sysfs-class-net +++ b/Documentation/ABI/testing/sysfs-class-net @@ -91,6 +91,24 @@ Description: stacked (e.g: VLAN interfaces) but still have the same MAC address as their parent device. +What: /sys/class/net/<iface>/dev_port +Date: February 2014 +KernelVersion: 3.15 +Contact: netdev@vger.kernel.org +Description: + Indicates the port number of this network device, formatted + as a decimal value. Some NICs have multiple independent ports + on the same PCI bus, device and function. This attribute allows + userspace to distinguish the respective interfaces. + + Note: some device drivers started to use 'dev_id' for this + purpose since long before 3.15 and have not adopted the new + attribute ever since. To query the port number, some tools look + exclusively at 'dev_port', while others only consult 'dev_id'. + If a network device has multiple client adapter ports as + described in the previous paragraph and does not set this + attribute to its port number, it's a kernel bug. + What: /sys/class/net/<iface>/dormant Date: March 2006 KernelVersion: 2.6.17 |