From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id D427CC072A2 for ; Wed, 15 Nov 2023 19:54:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235542AbjKOTyI (ORCPT ); Wed, 15 Nov 2023 14:54:08 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57834 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235552AbjKOTyH (ORCPT ); Wed, 15 Nov 2023 14:54:07 -0500 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 146521AC for ; Wed, 15 Nov 2023 11:54:04 -0800 (PST) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8D887C433C7; Wed, 15 Nov 2023 19:54:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1700078043; bh=f0To1b8iDnkUFOsysJZ9kxmx13PvFFWWQhGTWfN/M9I=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=wlyDr7meEOdLlItL/fWEPTRsbC/+UY+Tm3a4ZxFWNZb9Nk4ahtZZwLODledF9ImMN Lp3AlVmtYD7M7rOfSi1u73L1vm4gKX2L4qDhZYvt0y35lRQVjaO1u7TK4drK/x4zeg Ek0/9BsBx4DszIIwkND69BusmYreF3+w+XmqlGhI= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Eric Dumazet , Mahesh Bandewar , Jakub Kicinski , Sasha Levin Subject: [PATCH 6.1 075/379] ipvlan: properly track tx_errors Date: Wed, 15 Nov 2023 14:22:30 -0500 Message-ID: <20231115192649.580995055@linuxfoundation.org> X-Mailer: git-send-email 2.42.1 In-Reply-To: <20231115192645.143643130@linuxfoundation.org> References: <20231115192645.143643130@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org 6.1-stable review patch. If anyone has any objections, please let me know. ------------------ From: Eric Dumazet [ Upstream commit ff672b9ffeb3f82135488ac16c5c5eb4b992999b ] Both ipvlan_process_v4_outbound() and ipvlan_process_v6_outbound() increment dev->stats.tx_errors in case of errors. Unfortunately there are two issues : 1) ipvlan_get_stats64() does not propagate dev->stats.tx_errors to user. 2) Increments are not atomic. KCSAN would complain eventually. Use DEV_STATS_INC() to not miss an update, and change ipvlan_get_stats64() to copy the value back to user. Fixes: 2ad7bf363841 ("ipvlan: Initial check-in of the IPVLAN driver.") Signed-off-by: Eric Dumazet Cc: Mahesh Bandewar Link: https://lore.kernel.org/r/20231026131446.3933175-1-edumazet@google.com Signed-off-by: Jakub Kicinski Signed-off-by: Sasha Levin --- drivers/net/ipvlan/ipvlan_core.c | 8 ++++---- drivers/net/ipvlan/ipvlan_main.c | 1 + 2 files changed, 5 insertions(+), 4 deletions(-) diff --git a/drivers/net/ipvlan/ipvlan_core.c b/drivers/net/ipvlan/ipvlan_core.c index 59e29e08398a0..b29b7d97b7739 100644 --- a/drivers/net/ipvlan/ipvlan_core.c +++ b/drivers/net/ipvlan/ipvlan_core.c @@ -441,12 +441,12 @@ static int ipvlan_process_v4_outbound(struct sk_buff *skb) err = ip_local_out(net, skb->sk, skb); if (unlikely(net_xmit_eval(err))) - dev->stats.tx_errors++; + DEV_STATS_INC(dev, tx_errors); else ret = NET_XMIT_SUCCESS; goto out; err: - dev->stats.tx_errors++; + DEV_STATS_INC(dev, tx_errors); kfree_skb(skb); out: return ret; @@ -482,12 +482,12 @@ static int ipvlan_process_v6_outbound(struct sk_buff *skb) err = ip6_local_out(net, skb->sk, skb); if (unlikely(net_xmit_eval(err))) - dev->stats.tx_errors++; + DEV_STATS_INC(dev, tx_errors); else ret = NET_XMIT_SUCCESS; goto out; err: - dev->stats.tx_errors++; + DEV_STATS_INC(dev, tx_errors); kfree_skb(skb); out: return ret; diff --git a/drivers/net/ipvlan/ipvlan_main.c b/drivers/net/ipvlan/ipvlan_main.c index cd16bc8bf154c..fbf2d5b67aafa 100644 --- a/drivers/net/ipvlan/ipvlan_main.c +++ b/drivers/net/ipvlan/ipvlan_main.c @@ -324,6 +324,7 @@ static void ipvlan_get_stats64(struct net_device *dev, s->rx_dropped = rx_errs; s->tx_dropped = tx_drps; } + s->tx_errors = DEV_STATS_READ(dev, tx_errors); } static int ipvlan_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid) -- 2.42.0