From patchwork Sun Mar 2 00:08:55 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stanislav Fomichev X-Patchwork-Id: 13997725 X-Patchwork-Delegate: kuba@kernel.org Received: from mail-pl1-f174.google.com (mail-pl1-f174.google.com [209.85.214.174]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8E20C23774 for ; Sun, 2 Mar 2025 00:09:14 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.174 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740874157; cv=none; b=lM/VkLwcegP+dkqRInbAhdR0Pl2sw7BfEJBYhq7RxQFDtCIBSuG3TY396UkE438qZt0HuLcF+zVT1z1IQZmzRSKYWnbVVnY4l/G5PoMzUHyXEw5Ttqx+B3G1v2PJ97UfKz40VNIDT3eqBalqxutvTlafqY9fvhMlZTiLqHJwW4I= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740874157; c=relaxed/simple; bh=AXuPatgI6JYh65SXbP/s0MAfMkxj9+67nkhCGsyh+SA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=nDP6tkIR/Dz3FQ6WmqGYvOxg+901iyF76HgkC4MFi9qtwxnaWH6dnJJX75ht5TXFTXPMGOmB6F+n03mNjE1yOa+zvanTuD6QX4+lgdpIzRmdflmbq0RMiwrueQxGNFBcQTCR5PHR2G5tXrB+jFtaw6chrqJ020uzvwk4Fpkdi8Y= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=fomichev.me; spf=pass smtp.mailfrom=gmail.com; arc=none smtp.client-ip=209.85.214.174 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=fomichev.me Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Received: by mail-pl1-f174.google.com with SMTP id d9443c01a7336-22339936bbfso49114505ad.1 for ; Sat, 01 Mar 2025 16:09:14 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1740874153; x=1741478953; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=7GbArhpot/rdRkmXTytt5Baj/3rBns75b0alG0TAw8I=; b=uCI0LZr3yQIeMoxVij6+w6x9F/vN9HxMkUEpLtpbfQFR/WUYPs9QVMBqttx8CxKmg+ CWQb5awRRnEnsr1aSYErxyhGS1DS221QfF4D6LvXoqOCwbbczcMjHul44bGcLLG6Qz1q 2BUmtBy3s6gjR09cAvMRnyZyCGrpzIEorofokfT57p1o42LSl1kzyd6n8WCboBYDZB9v Y7/lB2n8gergwlBVdikUgdVRNjwDWCQLHLHN9ANMKZoXN3BlsCJRkdWI+Oz/8asu6Ca6 CcFWSiu88OgpHX6PC24cGrRuP1La61FxcxaBbTx42qPqG8ewnH01DBbBvg4VrIXCL196 p7OQ== X-Gm-Message-State: AOJu0YxswGHRReUQsbPpYnbugyOz4EH8yrbbBFnH1QA+rE8xVgdRgaNn WqPG2uMAE0mCO6uDl5fDB6+QkfgtT16MzAMhUUCXWSmT91bti7yiNciY X-Gm-Gg: ASbGncsg5o0Gcl8dmIa401ia1CjMZZkMVtERKju3NkIHRQmMSFK/38ac838Ke5dSd+a Ke8GZK/a7zOKXu6YL5Jbe9hfQEpsZxm7i3QiVfg7aNzS0ravATp5Gj36Cv97P6OBHZgNc66tFdv 4oJ/uiye7JbiyeB6HUFm0ZGai/Q6sm5opfKfxdb/1iKOWsEEBPAn8Vbt6jEU62qllgzdfNF3RFc qdNqYPwNydOsnidE+oATlgMwE67mPC29+zBzdMKmvC9VQw1HBHrt4infY18WjDd74Ut+WcOpN2t wMDSHTDRz56eVeYck3VtqhbXT2Cwii1fbNrHr8++jLAh X-Google-Smtp-Source: AGHT+IH3M4WFX1bMV9IlGnP/BxBUz01Zjlt3WUO4Gi7TQakz9zyJbuSML1X0czVNg6cQZsxoCB9LGQ== X-Received: by 2002:a17:902:e750:b0:21f:81f4:21b8 with SMTP id d9443c01a7336-2236926a6e9mr117035045ad.50.1740874153620; Sat, 01 Mar 2025 16:09:13 -0800 (PST) Received: from localhost ([2601:646:9e00:f56e:123b:cea3:439a:b3e3]) by smtp.gmail.com with UTF8SMTPSA id d9443c01a7336-223504c5bfesm53641505ad.131.2025.03.01.16.09.12 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 01 Mar 2025 16:09:13 -0800 (PST) From: Stanislav Fomichev To: netdev@vger.kernel.org Cc: davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, Saeed Mahameed Subject: [PATCH net-next v10 08/14] net: hold netdev instance lock during sysfs operations Date: Sat, 1 Mar 2025 16:08:55 -0800 Message-ID: <20250302000901.2729164-9-sdf@fomichev.me> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20250302000901.2729164-1-sdf@fomichev.me> References: <20250302000901.2729164-1-sdf@fomichev.me> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Patchwork-Delegate: kuba@kernel.org Most of them are already covered by the converted dev_xxx APIs. Add the locking wrappers for the remaining ones. Cc: Saeed Mahameed Signed-off-by: Stanislav Fomichev --- drivers/net/bonding/bond_main.c | 7 +++- include/linux/netdevice.h | 4 ++ net/core/dev.c | 58 ++++++----------------------- net/core/dev_api.c | 65 +++++++++++++++++++++++++++++++++ net/core/net-sysfs.c | 2 + 5 files changed, 88 insertions(+), 48 deletions(-) diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c index 916e90d54c0b..d20fc984adb4 100644 --- a/drivers/net/bonding/bond_main.c +++ b/drivers/net/bonding/bond_main.c @@ -2644,10 +2644,13 @@ static int __bond_release_one(struct net_device *bond_dev, dev_set_mac_address(slave_dev, (struct sockaddr *)&ss, NULL); } - if (unregister) + if (unregister) { + netdev_lock_ops(slave_dev); __dev_set_mtu(slave_dev, slave->original_mtu); - else + netdev_unlock_ops(slave_dev); + } else { dev_set_mtu(slave_dev, slave->original_mtu); + } if (!netif_is_bond_master(slave_dev)) slave_dev->priv_flags &= ~IFF_BONDING; diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index 2aabd4ba1471..f95d389959d0 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -3382,6 +3382,7 @@ void dev_close(struct net_device *dev); void dev_close_many(struct list_head *head, bool unlink); int dev_setup_tc(struct net_device *dev, enum tc_setup_type type, void *type_data); +void netif_disable_lro(struct net_device *dev); void dev_disable_lro(struct net_device *dev); int dev_loopback_xmit(struct net *net, struct sock *sk, struct sk_buff *newskb); u16 dev_pick_tx_zero(struct net_device *dev, struct sk_buff *skb, @@ -4256,6 +4257,8 @@ int netif_set_mtu(struct net_device *dev, int new_mtu); int dev_set_mtu(struct net_device *, int); int dev_pre_changeaddr_notify(struct net_device *dev, const char *addr, struct netlink_ext_ack *extack); +int netif_set_mac_address(struct net_device *dev, struct sockaddr *sa, + struct netlink_ext_ack *extack); int dev_set_mac_address(struct net_device *dev, struct sockaddr *sa, struct netlink_ext_ack *extack); int netif_set_mac_address_user(struct net_device *dev, struct sockaddr *sa, @@ -5015,6 +5018,7 @@ static inline void __dev_mc_unsync(struct net_device *dev, /* Functions used for secondary unicast and multicast support */ void dev_set_rx_mode(struct net_device *dev); int dev_set_promiscuity(struct net_device *dev, int inc); +int netif_set_allmulti(struct net_device *dev, int inc, bool notify); int dev_set_allmulti(struct net_device *dev, int inc); void netdev_state_change(struct net_device *dev); void __netdev_notify_peers(struct net_device *dev); diff --git a/net/core/dev.c b/net/core/dev.c index d5cf27933699..fd12bb119372 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -1757,15 +1757,7 @@ int dev_setup_tc(struct net_device *dev, enum tc_setup_type type, } EXPORT_SYMBOL(dev_setup_tc); -/** - * dev_disable_lro - disable Large Receive Offload on a device - * @dev: device - * - * Disable Large Receive Offload (LRO) on a net device. Must be - * called under RTNL. This is needed if received packets may be - * forwarded to another interface. - */ -void dev_disable_lro(struct net_device *dev) +void netif_disable_lro(struct net_device *dev) { struct net_device *lower_dev; struct list_head *iter; @@ -1776,10 +1768,12 @@ void dev_disable_lro(struct net_device *dev) if (unlikely(dev->features & NETIF_F_LRO)) netdev_WARN(dev, "failed to disable LRO!\n"); - netdev_for_each_lower_dev(dev, lower_dev, iter) - dev_disable_lro(lower_dev); + netdev_for_each_lower_dev(dev, lower_dev, iter) { + netdev_lock_ops(lower_dev); + netif_disable_lro(lower_dev); + netdev_unlock_ops(lower_dev); + } } -EXPORT_SYMBOL(dev_disable_lro); /** * dev_disable_gro_hw - disable HW Generic Receive Offload on a device @@ -6038,7 +6032,7 @@ static int generic_xdp_install(struct net_device *dev, struct netdev_bpf *xdp) static_branch_dec(&generic_xdp_needed_key); } else if (new && !old) { static_branch_inc(&generic_xdp_needed_key); - dev_disable_lro(dev); + netif_disable_lro(dev); dev_disable_gro_hw(dev); } break; @@ -9210,7 +9204,7 @@ int dev_set_promiscuity(struct net_device *dev, int inc) } EXPORT_SYMBOL(dev_set_promiscuity); -static int __dev_set_allmulti(struct net_device *dev, int inc, bool notify) +int netif_set_allmulti(struct net_device *dev, int inc, bool notify) { unsigned int old_flags = dev->flags, old_gflags = dev->gflags; unsigned int allmulti, flags; @@ -9245,25 +9239,6 @@ static int __dev_set_allmulti(struct net_device *dev, int inc, bool notify) return 0; } -/** - * dev_set_allmulti - update allmulti count on a device - * @dev: device - * @inc: modifier - * - * Add or remove reception of all multicast frames to a device. While the - * count in the device remains above zero the interface remains listening - * to all interfaces. Once it hits zero the device reverts back to normal - * filtering operation. A negative @inc value is used to drop the counter - * when releasing a resource needing all multicasts. - * Return 0 if successful or a negative errno code on error. - */ - -int dev_set_allmulti(struct net_device *dev, int inc) -{ - return __dev_set_allmulti(dev, inc, true); -} -EXPORT_SYMBOL(dev_set_allmulti); - /* * Upload unicast and multicast address lists to device and * configure RX filtering. When the device doesn't support unicast @@ -9396,7 +9371,7 @@ int __dev_change_flags(struct net_device *dev, unsigned int flags, int inc = (flags & IFF_ALLMULTI) ? 1 : -1; dev->gflags ^= IFF_ALLMULTI; - __dev_set_allmulti(dev, inc, false); + netif_set_allmulti(dev, inc, false); } return ret; @@ -9588,16 +9563,8 @@ int dev_pre_changeaddr_notify(struct net_device *dev, const char *addr, } EXPORT_SYMBOL(dev_pre_changeaddr_notify); -/** - * dev_set_mac_address - Change Media Access Control Address - * @dev: device - * @sa: new address - * @extack: netlink extended ack - * - * Change the hardware (MAC) address of the device - */ -int dev_set_mac_address(struct net_device *dev, struct sockaddr *sa, - struct netlink_ext_ack *extack) +int netif_set_mac_address(struct net_device *dev, struct sockaddr *sa, + struct netlink_ext_ack *extack) { const struct net_device_ops *ops = dev->netdev_ops; int err; @@ -9621,7 +9588,6 @@ int dev_set_mac_address(struct net_device *dev, struct sockaddr *sa, add_device_randomness(dev->dev_addr, dev->addr_len); return 0; } -EXPORT_SYMBOL(dev_set_mac_address); DECLARE_RWSEM(dev_addr_sem); @@ -9631,7 +9597,7 @@ int netif_set_mac_address_user(struct net_device *dev, struct sockaddr *sa, int ret; down_write(&dev_addr_sem); - ret = dev_set_mac_address(dev, sa, extack); + ret = netif_set_mac_address(dev, sa, extack); up_write(&dev_addr_sem); return ret; } diff --git a/net/core/dev_api.c b/net/core/dev_api.c index 7dae30781411..87a62022ef1c 100644 --- a/net/core/dev_api.c +++ b/net/core/dev_api.c @@ -252,3 +252,68 @@ int dev_set_mtu(struct net_device *dev, int new_mtu) return ret; } EXPORT_SYMBOL(dev_set_mtu); + +/** + * dev_disable_lro() - disable Large Receive Offload on a device + * @dev: device + * + * Disable Large Receive Offload (LRO) on a net device. Must be + * called under RTNL. This is needed if received packets may be + * forwarded to another interface. + */ +void dev_disable_lro(struct net_device *dev) +{ + netdev_lock_ops(dev); + netif_disable_lro(dev); + netdev_unlock_ops(dev); +} +EXPORT_SYMBOL(dev_disable_lro); + +/** + * dev_set_allmulti() - update allmulti count on a device + * @dev: device + * @inc: modifier + * + * Add or remove reception of all multicast frames to a device. While the + * count in the device remains above zero the interface remains listening + * to all interfaces. Once it hits zero the device reverts back to normal + * filtering operation. A negative @inc value is used to drop the counter + * when releasing a resource needing all multicasts. + * + * Return: 0 on success, -errno on failure. + */ + +int dev_set_allmulti(struct net_device *dev, int inc) +{ + int ret; + + netdev_lock_ops(dev); + ret = netif_set_allmulti(dev, inc, true); + netdev_unlock_ops(dev); + + return ret; +} +EXPORT_SYMBOL(dev_set_allmulti); + +/** + * dev_set_mac_address() - change Media Access Control Address + * @dev: device + * @sa: new address + * @extack: netlink extended ack + * + * Change the hardware (MAC) address of the device + * + * Return: 0 on success, -errno on failure. + */ +int dev_set_mac_address(struct net_device *dev, struct sockaddr *sa, + struct netlink_ext_ack *extack) +{ + int ret; + + netdev_lock_ops(dev); + ret = netif_set_mac_address(dev, sa, extack); + netdev_unlock_ops(dev); + + return ret; +} +EXPORT_SYMBOL(dev_set_mac_address); diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c index 8d9dc048a548..27eea34d1b41 100644 --- a/net/core/net-sysfs.c +++ b/net/core/net-sysfs.c @@ -1483,8 +1483,10 @@ static ssize_t tx_maxrate_store(struct kobject *kobj, struct attribute *attr, return err; err = -EOPNOTSUPP; + netdev_lock_ops(dev); if (dev->netdev_ops->ndo_set_tx_maxrate) err = dev->netdev_ops->ndo_set_tx_maxrate(dev, index, rate); + netdev_unlock_ops(dev); if (!err) { queue->tx_maxrate = rate;