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ethtool: provide link mode information with LINKMODES_GET request

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Implement LINKMODES_GET netlink request to get link modes related
information provided by ETHTOOL_GLINKSETTINGS and ETHTOOL_GSET ioctl
commands.

This request provides supported, advertised and peer advertised link modes,
autonegotiation flag, speed and duplex.

LINKMODES_GET request can be used with NLM_F_DUMP (without device
identification) to request the information for all devices in current
network namespace providing the data.

Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Michal Kubecek
2019-12-27 15:56:08 +01:00
committed by David S. Miller
parent 73286734c1
commit f625aa9be8
7 changed files with 207 additions and 1 deletions
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36
Documentation/networking/ethtool-netlink.rst
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@@ -182,6 +182,7 @@ Userspace to kernel:
``ETHTOOL_MSG_STRSET_GET`` get string set
``ETHTOOL_MSG_LINKINFO_GET`` get link settings
``ETHTOOL_MSG_LINKINFO_SET`` set link settings
``ETHTOOL_MSG_LINKMODES_GET`` get link modes info
===================================== ================================
Kernel to userspace:
@@ -190,6 +191,7 @@ Kernel to userspace:
``ETHTOOL_MSG_STRSET_GET_REPLY`` string set contents
``ETHTOOL_MSG_LINKINFO_GET_REPLY`` link settings
``ETHTOOL_MSG_LINKINFO_NTF`` link settings notification
``ETHTOOL_MSG_LINKMODES_GET_REPLY`` link modes info
===================================== ================================
``GET`` requests are sent by userspace applications to retrieve device
@@ -332,6 +334,38 @@ MDI(-X) status and transceiver cannot be set, request with the corresponding
attributes is rejected.
LINKMODES_GET
=============
Requests link modes (supported, advertised and peer advertised) and related
information (autonegotiation status, link speed and duplex) as provided by
``ETHTOOL_GLINKSETTINGS``. The request does not use any attributes.
Request contents:
==================================== ====== ==========================
``ETHTOOL_A_LINKMODES_HEADER`` nested request header
==================================== ====== ==========================
Kernel response contents:
==================================== ====== ==========================
``ETHTOOL_A_LINKMODES_HEADER`` nested reply header
``ETHTOOL_A_LINKMODES_AUTONEG`` u8 autonegotiation status
``ETHTOOL_A_LINKMODES_OURS`` bitset advertised link modes
``ETHTOOL_A_LINKMODES_PEER`` bitset partner link modes
``ETHTOOL_A_LINKMODES_SPEED`` u32 link speed (Mb/s)
``ETHTOOL_A_LINKMODES_DUPLEX`` u8 duplex mode
==================================== ====== ==========================
For ``ETHTOOL_A_LINKMODES_OURS``, value represents advertised modes and mask
represents supported modes. ``ETHTOOL_A_LINKMODES_PEER`` in the reply is a bit
list.
``LINKMODES_GET`` allows dump requests (kernel returns reply messages for all
devices supporting the request).
Request translation
===================
@@ -343,6 +377,7 @@ have their netlink replacement yet.
ioctl command netlink command
=================================== =====================================
``ETHTOOL_GSET`` ``ETHTOOL_MSG_LINKINFO_GET``
``ETHTOOL_MSG_LINKMODES_GET``
``ETHTOOL_SSET`` ``ETHTOOL_MSG_LINKINFO_SET``
``ETHTOOL_GDRVINFO`` n/a
``ETHTOOL_GREGS`` n/a
@@ -417,6 +452,7 @@ have their netlink replacement yet.
``ETHTOOL_GPHYSTATS`` n/a
``ETHTOOL_PERQUEUE`` n/a
``ETHTOOL_GLINKSETTINGS`` ``ETHTOOL_MSG_LINKINFO_GET``
``ETHTOOL_MSG_LINKMODES_GET``
``ETHTOOL_SLINKSETTINGS`` ``ETHTOOL_MSG_LINKINFO_SET``
``ETHTOOL_PHY_GTUNABLE`` n/a
``ETHTOOL_PHY_STUNABLE`` n/a