ethtool: rejig the RSS notification machinery for more types

In anticipation for CREATE and DELETE notifications - explicitly
pass the notification type to ethtool_rss_notify(), when calling
from the IOCTL code.

Reviewed-by: Gal Pressman <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Jakub Kicinski <[e-mail]>

net/ethtool/common.h

···
 bool __ethtool_dev_mm_supported(struct net_device *dev);
 
 #if IS_ENABLED(CONFIG_ETHTOOL_NETLINK)
-void ethtool_rss_notify(struct net_device *dev, u32 rss_context);
+void ethtool_rss_notify(struct net_device *dev, u32 type, u32 rss_context);
 #else
-static inline void ethtool_rss_notify(struct net_device *dev, u32 rss_context)
+static inline void
+ethtool_rss_notify(struct net_device *dev, u32 type, u32 rss_context)
 {
 }
 #endif

net/ethtool/ioctl.c

···
 	if (rc)
 		return rc;
 
-	ethtool_rss_notify(dev, fields.rss_context);
+	ethtool_rss_notify(dev, ETHTOOL_MSG_RSS_NTF, fields.rss_context);
 	return 0;
 }
 
···
 	struct ethtool_rxnfc rx_rings;
 	struct ethtool_rxfh rxfh;
 	bool create = false;
-	bool mod = false;
 	u8 *rss_config;
+	int ntf = 0;
 	int ret;
 
 	if (!ops->get_rxnfc || !ops->set_rxfh)
···
 	rxfh_dev.input_xfrm = rxfh.input_xfrm;
 
 	if (!rxfh.rss_context) {
+		ntf = ETHTOOL_MSG_RSS_NTF;
 		ret = ops->set_rxfh(dev, &rxfh_dev, extack);
 	} else if (create) {
 		ret = ops->create_rxfh_context(dev, ctx, &rxfh_dev, extack);
···
 		ret = ops->remove_rxfh_context(dev, ctx, rxfh.rss_context,
 					       extack);
 	} else {
+		ntf = ETHTOOL_MSG_RSS_NTF;
 		ret = ops->modify_rxfh_context(dev, ctx, &rxfh_dev, extack);
 	}
 	if (ret) {
+		ntf = 0;
 		if (create) {
 			/* failed to create, free our new tracking entry */
 			xa_erase(&dev->ethtool->rss_ctx, rxfh.rss_context);
···
 		}
 		goto out_unlock;
 	}
-	mod = !create && !rxfh_dev.rss_delete;
 
 	if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, rss_context),
 			 &rxfh_dev.rss_context, sizeof(rxfh_dev.rss_context)))
···
 	mutex_unlock(&dev->ethtool->rss_lock);
 out_free:
 	kfree(rss_config);
-	if (mod)
-		ethtool_rss_notify(dev, rxfh.rss_context);
+	if (ntf)
+		ethtool_rss_notify(dev, ntf, rxfh.rss_context);
 	return ret;
 }
 

net/ethtool/rss.c

···
 
 /* RSS_NTF */
 
-void ethtool_rss_notify(struct net_device *dev, u32 rss_context)
+void ethtool_rss_notify(struct net_device *dev, u32 type, u32 rss_context)
 {
 	struct rss_req_info req_info = {
 		.rss_context = rss_context,
 	};
 
-	ethnl_notify(dev, ETHTOOL_MSG_RSS_NTF, &req_info.base);
+	ethnl_notify(dev, type, &req_info.base);
 }
 
 /* RSS_SET */