ethtool: add EEE_NTF notification

Send ETHTOOL_MSG_EEE_NTF notification whenever EEE settings of a network
device are modified using ETHTOOL_MSG_EEE_SET netlink message or
ETHTOOL_SEEE ioctl request.
Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
Signed-off-by: David S. Miller <davem@davemloft.net>

Documentation/networking/ethtool-netlink.rst

@@ -232,6 +232,7 @@ Kernel to userspace:
   ``ETHTOOL_MSG_PAUSE_GET_REPLY``       pause parameters
   ``ETHTOOL_MSG_PAUSE_NTF``             pause parameters
   ``ETHTOOL_MSG_EEE_GET_REPLY``         EEE settings
+  ``ETHTOOL_MSG_EEE_NTF``               EEE settings
   ===================================== =================================
 
 ``GET`` requests are sent by userspace applications to retrieve device

include/uapi/linux/ethtool_netlink.h

@@ -71,6 +71,7 @@ enum {
 	ETHTOOL_MSG_PAUSE_GET_REPLY,
 	ETHTOOL_MSG_PAUSE_NTF,
 	ETHTOOL_MSG_EEE_GET_REPLY,
+	ETHTOOL_MSG_EEE_NTF,
 
 	/* add new constants above here */
 	__ETHTOOL_MSG_KERNEL_CNT,

net/ethtool/eee.c

@@ -192,6 +192,9 @@ int ethnl_set_eee(struct sk_buff *skb, struct genl_info *info)
 		goto out_ops;
 
 	ret = dev->ethtool_ops->set_eee(dev, &eee);
+	if (ret < 0)
+		goto out_ops;
+	ethtool_notify(dev, ETHTOOL_MSG_EEE_NTF, NULL);
 
 out_ops:
 	ethnl_ops_complete(dev);

net/ethtool/ioctl.c

@@ -1354,6 +1354,7 @@ static int ethtool_get_eee(struct net_device *dev, char __user *useraddr)
 static int ethtool_set_eee(struct net_device *dev, char __user *useraddr)
 {
 	struct ethtool_eee edata;
+	int ret;
 
 	if (!dev->ethtool_ops->set_eee)
 		return -EOPNOTSUPP;
@@ -1361,7 +1362,10 @@ static int ethtool_set_eee(struct net_device *dev, char __user *useraddr)
 	if (copy_from_user(&edata, useraddr, sizeof(edata)))
 		return -EFAULT;
 
-	return dev->ethtool_ops->set_eee(dev, &edata);
+	ret = dev->ethtool_ops->set_eee(dev, &edata);
+	if (!ret)
+		ethtool_notify(dev, ETHTOOL_MSG_EEE_NTF, NULL);
+	return ret;
 }
 
 static int ethtool_nway_reset(struct net_device *dev)

net/ethtool/netlink.c

@@ -548,6 +548,7 @@ ethnl_default_notify_ops[ETHTOOL_MSG_KERNEL_MAX + 1] = {
 	[ETHTOOL_MSG_CHANNELS_NTF]	= &ethnl_channels_request_ops,
 	[ETHTOOL_MSG_COALESCE_NTF]	= &ethnl_coalesce_request_ops,
 	[ETHTOOL_MSG_PAUSE_NTF]		= &ethnl_pause_request_ops,
+	[ETHTOOL_MSG_EEE_NTF]		= &ethnl_eee_request_ops,
 };
 
 /* default notification handler */
@@ -639,6 +640,7 @@ static const ethnl_notify_handler_t ethnl_notify_handlers[] = {
 	[ETHTOOL_MSG_CHANNELS_NTF]	= ethnl_default_notify,
 	[ETHTOOL_MSG_COALESCE_NTF]	= ethnl_default_notify,
 	[ETHTOOL_MSG_PAUSE_NTF]		= ethnl_default_notify,
+	[ETHTOOL_MSG_EEE_NTF]		= ethnl_default_notify,
 };
 
 void ethtool_notify(struct net_device *dev, unsigned int cmd, const void *data)