From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 66F94223339 for ; Sat, 21 Jun 2025 17:19:54 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750526394; cv=none; b=MmGB0sxRA8mOTAYcjcmEJw2yqSPiegA0/xDf1u+cc9cCrhXaANBrJXIa5tsCafAq3FNM4ovKVLzABSlotz6Ggu86gYz/c02irJiUQlaG4kiMWL1PDQvg+Z2J7dqIJSk1rg5cENxtktaZ/+a/34PMrM50qTgwhT+CLqvtPvXqbTo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750526394; c=relaxed/simple; bh=Zx11s1YucFMH1ZeVE8yR+BxFrskCjmQC0zphyCBX7kg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=ZqVoyqEazkc1ITtVVJS6ZwocIgA5VXAqWCx4NZwt2zSvL1YIUoPXDFiDyzfiOwEp8TbCEz0T/kSy5mC8SHdXJ0fiG43VV9Dj2Tp3Gn9YVTlqTwYatHGRhnK8XVzResPRjq7t7lW0lmZ5HbT+tL3Gd/A0uPZsur7i17SXs80cMt0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=qgGP1Loq; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="qgGP1Loq" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C6C98C4CEF2; Sat, 21 Jun 2025 17:19:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1750526394; bh=Zx11s1YucFMH1ZeVE8yR+BxFrskCjmQC0zphyCBX7kg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=qgGP1LoqK75nlGeJwyxNeL6GqViQK5BtZ6CfsfyrZ+kd3GauGjQxxmdKrNCis+ue5 QFtoiBnDLCClznVVGkyPDdvBTPdv/Ou6DxT+fk1HiKG5+VcKxsJuGR349O922QOAa4 3g6HFRsKJzQRS8z8oZ7ejUTYaZa6qZ6yeO/xfEy8jKDVFxJoqEUerQ7Y4HjNaxzkVS hWohFg5EXPYNCcwLOxgxFixGLQJ3by1vLa95MVriiW6KHX+f5sH2FF6qsmEDeV/J6o VDmOAKioVW88mh4E+rpTKGkvxMwlg89HymWY7AF7wEkiBoKiN4qpDYfbm1kNkbZy6j xL+ca5W1F1Gog== From: Jakub Kicinski To: davem@davemloft.net Cc: netdev@vger.kernel.org, edumazet@google.com, pabeni@redhat.com, andrew+netdev@lunn.ch, horms@kernel.org, donald.hunter@gmail.com, maxime.chevallier@bootlin.com, sdf@fomichev.me, jdamato@fastly.com, ecree.xilinx@gmail.com, Jakub Kicinski Subject: [PATCH net-next 4/9] net: ethtool: remove the data argument from ethtool_notify() Date: Sat, 21 Jun 2025 10:19:39 -0700 Message-ID: <20250621171944.2619249-5-kuba@kernel.org> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250621171944.2619249-1-kuba@kernel.org> References: <20250621171944.2619249-1-kuba@kernel.org> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit ethtool_notify() takes a const void *data argument, which presumably was intended to pass information from the call site to the subcommand handler. This argument currently has no users. Expecting the data to be subcommand-specific has two complications. Complication #1 is that its not plumbed thru any of the standardized callbacks. It gets propagated to ethnl_default_notify() where it remains unused. Coming from the ethnl_default_set_doit() side we pass in NULL, because how could we have a command specific attribute in a generic handler. Complication #2 is that we expect the ethtool_notify() callers to know what attribute type to pass in. Again, the data pointer is untyped. RSS will need to pass the context ID to the notifications. I think it's a better design if the "subcommand" exports its own typed interface and constructs the appropriate argument struct (which will be req_info). Remove the unused data argument from ethtool_notify() but retain it in a new internal helper which subcommands can use to build a typed interface. Signed-off-by: Jakub Kicinski --- include/linux/netdevice.h | 5 ++--- net/ethtool/netlink.h | 1 + net/ethtool/ioctl.c | 24 ++++++++++++------------ net/ethtool/netlink.c | 11 ++++++++--- 4 files changed, 23 insertions(+), 18 deletions(-) diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index 03c26bb0fbbe..db5bfd4e7ec8 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -5138,10 +5138,9 @@ void netdev_bonding_info_change(struct net_device *dev, struct netdev_bonding_info *bonding_info); #if IS_ENABLED(CONFIG_ETHTOOL_NETLINK) -void ethtool_notify(struct net_device *dev, unsigned int cmd, const void *data); +void ethtool_notify(struct net_device *dev, unsigned int cmd); #else -static inline void ethtool_notify(struct net_device *dev, unsigned int cmd, - const void *data) +static inline void ethtool_notify(struct net_device *dev, unsigned int cmd) { } #endif diff --git a/net/ethtool/netlink.h b/net/ethtool/netlink.h index 91b953924af3..4a061944a3aa 100644 --- a/net/ethtool/netlink.h +++ b/net/ethtool/netlink.h @@ -23,6 +23,7 @@ void *ethnl_dump_put(struct sk_buff *skb, struct netlink_callback *cb, u8 cmd); void *ethnl_bcastmsg_put(struct sk_buff *skb, u8 cmd); void *ethnl_unicast_put(struct sk_buff *skb, u32 portid, u32 seq, u8 cmd); int ethnl_multicast(struct sk_buff *skb, struct net_device *dev); +void ethnl_notify(struct net_device *dev, unsigned int cmd, const void *data); /** * ethnl_strz_size() - calculate attribute length for fixed size string diff --git a/net/ethtool/ioctl.c b/net/ethtool/ioctl.c index 82cde640aa87..96da9d18789b 100644 --- a/net/ethtool/ioctl.c +++ b/net/ethtool/ioctl.c @@ -617,8 +617,8 @@ static int ethtool_set_link_ksettings(struct net_device *dev, err = dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings); if (err >= 0) { - ethtool_notify(dev, ETHTOOL_MSG_LINKINFO_NTF, NULL); - ethtool_notify(dev, ETHTOOL_MSG_LINKMODES_NTF, NULL); + ethtool_notify(dev, ETHTOOL_MSG_LINKINFO_NTF); + ethtool_notify(dev, ETHTOOL_MSG_LINKMODES_NTF); } return err; } @@ -708,8 +708,8 @@ static int ethtool_set_settings(struct net_device *dev, void __user *useraddr) __ETHTOOL_LINK_MODE_MASK_NU32; ret = dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings); if (ret >= 0) { - ethtool_notify(dev, ETHTOOL_MSG_LINKINFO_NTF, NULL); - ethtool_notify(dev, ETHTOOL_MSG_LINKMODES_NTF, NULL); + ethtool_notify(dev, ETHTOOL_MSG_LINKINFO_NTF); + ethtool_notify(dev, ETHTOOL_MSG_LINKMODES_NTF); } return ret; } @@ -1868,7 +1868,7 @@ static int ethtool_set_wol(struct net_device *dev, char __user *useraddr) return ret; dev->ethtool->wol_enabled = !!wol.wolopts; - ethtool_notify(dev, ETHTOOL_MSG_WOL_NTF, NULL); + ethtool_notify(dev, ETHTOOL_MSG_WOL_NTF); return 0; } @@ -1944,7 +1944,7 @@ static int ethtool_set_eee(struct net_device *dev, char __user *useraddr) eee_to_keee(&keee, &eee); ret = dev->ethtool_ops->set_eee(dev, &keee); if (!ret) - ethtool_notify(dev, ETHTOOL_MSG_EEE_NTF, NULL); + ethtool_notify(dev, ETHTOOL_MSG_EEE_NTF); return ret; } @@ -2184,7 +2184,7 @@ static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev, ret = dev->ethtool_ops->set_coalesce(dev, &coalesce, &kernel_coalesce, NULL); if (!ret) - ethtool_notify(dev, ETHTOOL_MSG_COALESCE_NTF, NULL); + ethtool_notify(dev, ETHTOOL_MSG_COALESCE_NTF); return ret; } @@ -2228,7 +2228,7 @@ static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr) ret = dev->ethtool_ops->set_ringparam(dev, &ringparam, &kernel_ringparam, NULL); if (!ret) - ethtool_notify(dev, ETHTOOL_MSG_RINGS_NTF, NULL); + ethtool_notify(dev, ETHTOOL_MSG_RINGS_NTF); return ret; } @@ -2295,7 +2295,7 @@ static noinline_for_stack int ethtool_set_channels(struct net_device *dev, ret = dev->ethtool_ops->set_channels(dev, &channels); if (!ret) - ethtool_notify(dev, ETHTOOL_MSG_CHANNELS_NTF, NULL); + ethtool_notify(dev, ETHTOOL_MSG_CHANNELS_NTF); return ret; } @@ -2326,7 +2326,7 @@ static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr) ret = dev->ethtool_ops->set_pauseparam(dev, &pauseparam); if (!ret) - ethtool_notify(dev, ETHTOOL_MSG_PAUSE_NTF, NULL); + ethtool_notify(dev, ETHTOOL_MSG_PAUSE_NTF); return ret; } @@ -3328,7 +3328,7 @@ __dev_ethtool(struct net *net, struct ifreq *ifr, void __user *useraddr, rc = ethtool_set_value_void(dev, useraddr, dev->ethtool_ops->set_msglevel); if (!rc) - ethtool_notify(dev, ETHTOOL_MSG_DEBUG_NTF, NULL); + ethtool_notify(dev, ETHTOOL_MSG_DEBUG_NTF); break; case ETHTOOL_GEEE: rc = ethtool_get_eee(dev, useraddr); @@ -3392,7 +3392,7 @@ __dev_ethtool(struct net *net, struct ifreq *ifr, void __user *useraddr, rc = ethtool_get_value(dev, useraddr, ethcmd, dev->ethtool_ops->get_priv_flags); if (!rc) - ethtool_notify(dev, ETHTOOL_MSG_PRIVFLAGS_NTF, NULL); + ethtool_notify(dev, ETHTOOL_MSG_PRIVFLAGS_NTF); break; case ETHTOOL_SPFLAGS: rc = ethtool_set_value(dev, useraddr, diff --git a/net/ethtool/netlink.c b/net/ethtool/netlink.c index c5ec3c82ab2e..129f9d56ac65 100644 --- a/net/ethtool/netlink.c +++ b/net/ethtool/netlink.c @@ -911,7 +911,7 @@ static int ethnl_default_set_doit(struct sk_buff *skb, struct genl_info *info) swap(dev->cfg, dev->cfg_pending); if (!ret) goto out_ops; - ethtool_notify(dev, ops->set_ntf_cmd, NULL); + ethtool_notify(dev, ops->set_ntf_cmd); ret = 0; out_ops: @@ -1049,7 +1049,7 @@ static const ethnl_notify_handler_t ethnl_notify_handlers[] = { [ETHTOOL_MSG_MM_NTF] = ethnl_default_notify, }; -void ethtool_notify(struct net_device *dev, unsigned int cmd, const void *data) +void ethnl_notify(struct net_device *dev, unsigned int cmd, const void *data) { if (unlikely(!ethnl_ok)) return; @@ -1062,13 +1062,18 @@ void ethtool_notify(struct net_device *dev, unsigned int cmd, const void *data) WARN_ONCE(1, "notification %u not implemented (dev=%s)\n", cmd, netdev_name(dev)); } + +void ethtool_notify(struct net_device *dev, unsigned int cmd) +{ + ethnl_notify(dev, cmd, NULL); +} EXPORT_SYMBOL(ethtool_notify); static void ethnl_notify_features(struct netdev_notifier_info *info) { struct net_device *dev = netdev_notifier_info_to_dev(info); - ethtool_notify(dev, ETHTOOL_MSG_FEATURES_NTF, NULL); + ethtool_notify(dev, ETHTOOL_MSG_FEATURES_NTF); } static int ethnl_netdev_event(struct notifier_block *this, unsigned long event, -- 2.49.0