netdev - [PATCH net-next 09/15] ethtool: add PRIVFLAGS

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Date:   Wed, 11 Mar 2020 22:40:48 +0100 (CET)
From:   Michal Kubecek <mkubecek@...e.cz>
To:     David Miller <davem@...emloft.net>, netdev@...r.kernel.org
Cc:     Jakub Kicinski <kuba@...nel.org>, Jiri Pirko <jiri@...nulli.us>,
        Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        John Linville <linville@...driver.com>,
        Johannes Berg <johannes@...solutions.net>,
        linux-kernel@...r.kernel.org
Subject: [PATCH net-next 09/15] ethtool: add PRIVFLAGS_NTF notification

Send ETHTOOL_MSG_PRIVFLAGS_NTF notification whenever private flags of
a network device are modified using ETHTOOL_MSG_PRIVFLAGS_SET netlink
message or ETHTOOL_SPFLAGS ioctl request.

Signed-off-by: Michal Kubecek <mkubecek@...e.cz>
---
 include/uapi/linux/ethtool_netlink.h | 1 +
 net/ethtool/ioctl.c                  | 2 ++
 net/ethtool/netlink.c                | 2 ++
 net/ethtool/privflags.c              | 3 +++
 4 files changed, 8 insertions(+)

diff --git a/include/uapi/linux/ethtool_netlink.h b/include/uapi/linux/ethtool_netlink.h
index 13e631c86825..7f23a7f0fca1 100644
--- a/include/uapi/linux/ethtool_netlink.h
+++ b/include/uapi/linux/ethtool_netlink.h
@@ -51,6 +51,7 @@ enum {
 	ETHTOOL_MSG_FEATURES_SET_REPLY,
 	ETHTOOL_MSG_FEATURES_NTF,
 	ETHTOOL_MSG_PRIVFLAGS_GET_REPLY,
+	ETHTOOL_MSG_PRIVFLAGS_NTF,
 
 	/* add new constants above here */
 	__ETHTOOL_MSG_KERNEL_CNT,
diff --git a/net/ethtool/ioctl.c b/net/ethtool/ioctl.c
index 45d1bf1764b7..298822289496 100644
--- a/net/ethtool/ioctl.c
+++ b/net/ethtool/ioctl.c
@@ -2716,6 +2716,8 @@ int dev_ethtool(struct net *net, struct ifreq *ifr)
 	case ETHTOOL_GPFLAGS:
 		rc = ethtool_get_value(dev, useraddr, ethcmd,
 				       dev->ethtool_ops->get_priv_flags);
+		if (!rc)
+			ethtool_notify(dev, ETHTOOL_MSG_PRIVFLAGS_NTF, NULL);
 		break;
 	case ETHTOOL_SPFLAGS:
 		rc = ethtool_set_value(dev, useraddr,
diff --git a/net/ethtool/netlink.c b/net/ethtool/netlink.c
index b6795aad7ccb..dec82b0b80bd 100644
--- a/net/ethtool/netlink.c
+++ b/net/ethtool/netlink.c
@@ -530,6 +530,7 @@ ethnl_default_notify_ops[ETHTOOL_MSG_KERNEL_MAX + 1] = {
 	[ETHTOOL_MSG_DEBUG_NTF]		= &ethnl_debug_request_ops,
 	[ETHTOOL_MSG_WOL_NTF]		= &ethnl_wol_request_ops,
 	[ETHTOOL_MSG_FEATURES_NTF]	= &ethnl_features_request_ops,
+	[ETHTOOL_MSG_PRIVFLAGS_NTF]	= &ethnl_privflags_request_ops,
 };
 
 /* default notification handler */
@@ -616,6 +617,7 @@ static const ethnl_notify_handler_t ethnl_notify_handlers[] = {
 	[ETHTOOL_MSG_DEBUG_NTF]		= ethnl_default_notify,
 	[ETHTOOL_MSG_WOL_NTF]		= ethnl_default_notify,
 	[ETHTOOL_MSG_FEATURES_NTF]	= ethnl_default_notify,
+	[ETHTOOL_MSG_PRIVFLAGS_NTF]	= ethnl_default_notify,
 };
 
 void ethtool_notify(struct net_device *dev, unsigned int cmd, const void *data)
diff --git a/net/ethtool/privflags.c b/net/ethtool/privflags.c
index dfa76d552277..e8f03b33db9b 100644
--- a/net/ethtool/privflags.c
+++ b/net/ethtool/privflags.c
@@ -194,6 +194,9 @@ int ethnl_set_privflags(struct sk_buff *skb, struct genl_info *info)
 	if (ret < 0 || !mod)
 		goto out_free;
 	ret = ops->set_priv_flags(dev, flags);
+	if (ret < 0)
+		goto out_free;
+	ethtool_notify(dev, ETHTOOL_MSG_PRIVFLAGS_NTF, NULL);
 
 out_free:
 	kfree(names);
-- 
2.25.1