Currently, device drivers can only indicate to user space if the network
link is up or down, without additional information.
This patch set expand link-state to allow these drivers to expose more
information to user space about the link state. The information can save
users' time when trying to understand why a link is not operationally up,
for example.
The above is achieved by extending the existing ethtool LINKSTATE_GET
command with attributes that carry the extended state.
For example, no link due to missing cable:
$ ethtool ethX
...
Link detected: no (No cable)
Beside the general extended state, drivers can pass additional
information about the link state using the sub-state field. For example:
$ ethtool ethX
...
Link detected: no (Autoneg, No partner detected)
Amit Cohen (3):
netlink: expand ETHTOOL_LINKSTATE with extended state attributes
common: add infrastructure to convert kernel values to userspace
strings
netlink: settings: expand linkstate_reply_cb() to support link
extended state
common.c | 171 +++++++++++++++++++++++++++++++++++
common.h | 2 +
netlink/desc-ethtool.c | 2 +
netlink/settings.c | 59 +++++++++++-
uapi/linux/ethtool_netlink.h | 2 +
5 files changed, 233 insertions(+), 3 deletions(-)
--
2.20.1
