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net: dsa: Expose tagging protocol to user-space

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There is no way for user-space to know what a given DSA network device's
tagging protocol is. Expose this information through a dsa/tagging
attribute which reflects the tagging protocol currently in use.

This is helpful for configuration (e.g: none behaves dramatically
different wrt. bridges) as well as for packet capture tools when there
is not a proper Ethernet type available.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Florian Fainelli
2018-09-07 11:09:02 -07:00
committed by David S. Miller
parent 0fdc0d675b
commit 98cdb48071
4 changed files with 79 additions and 0 deletions
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Documentation/ABI/testing/sysfs-class-net-dsa Normal file
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What: /sys/class/net/<iface>/tagging
Date: August 2018
KernelVersion: 4.20
Contact: netdev@vger.kernel.org
Description:
String indicating the type of tagging protocol used by the
DSA slave network device.