commit 3d2b847fb99cf2b28aa046e486636e555bc6ed1c
author Michal Kubecek <mkubecek@suse.cz> Fri Dec 27 15:56:23 2019 +0100
committer David S. Miller <davem@davemloft.net> Fri Dec 27 16:40:02 2019 -0800
tree 216f898fac0e7de4b289a93f5f491492254eeb53
parent 1b1b1847c8505df2e1dd8804838526bed22a8bd4

ethtool: provide link state with LINKSTATE_GET request

Implement LINKSTATE_GET netlink request to get link state information.

At the moment, only link up flag as provided by ETHTOOL_GLINK ioctl command
is returned.

LINKSTATE_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>

net/ethtool/netlink.c

diff --git a/net/ethtool/netlink.c b/net/ethtool/netlink.c
index 1b5e1bd..4ca96c7 100644
--- a/net/ethtool/netlink.c
+++ b/net/ethtool/netlink.c
@@ -210,6 +210,7 @@ ethnl_default_requests[__ETHTOOL_MSG_USER_CNT] = {
 	[ETHTOOL_MSG_STRSET_GET]	= &ethnl_strset_request_ops,
 	[ETHTOOL_MSG_LINKINFO_GET]	= &ethnl_linkinfo_request_ops,
 	[ETHTOOL_MSG_LINKMODES_GET]	= &ethnl_linkmodes_request_ops,
+	[ETHTOOL_MSG_LINKSTATE_GET]	= &ethnl_linkstate_request_ops,
 };
 
 static struct ethnl_dump_ctx *ethnl_dump_context(struct netlink_callback *cb)
@@ -645,6 +646,13 @@ static const struct genl_ops ethtool_genl_ops[] = {
 		.flags	= GENL_UNS_ADMIN_PERM,
 		.doit	= ethnl_set_linkmodes,
 	},
+	{
+		.cmd	= ETHTOOL_MSG_LINKSTATE_GET,
+		.doit	= ethnl_default_doit,
+		.start	= ethnl_default_start,
+		.dumpit	= ethnl_default_dumpit,
+		.done	= ethnl_default_done,
+	},
 };
 
 static const struct genl_multicast_group ethtool_nl_mcgrps[] = {