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 71FB56BFBB; Tue, 14 May 2024 10:44:27 +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=1715683467; cv=none; b=o2GSxSGtHnWCZ7x82Ysk7pH7n8ysl5tZLj/wmYzrbCKkMGEFFX5t5sB92F1cevcQAE83JhkYBdSBq27H9guCYrR/fDVl8sKLlGLFQ/3zQbejeP8fM7SfCVbw2fH6ldZkE5Dbv5f8oxEXZLekPd5qf2rS/mq83lRkt5JJS8N+iDs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1715683467; c=relaxed/simple; bh=+dfb71cBrElcnunDduxpHuLMwJ9BInceTavh/eHbqMk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Z10K7K0LKfL4za7jPB/08TAb1hRwWs1TYxK2c0cQF5NWpNxu6uTTPD8ilJOwN/pinam8lJtuSb6h/w3uZS7Tk1xJ2HyLNOUfaIuTHOVS5An5LrQByMiNSPFhn0/+tznRaiqI/I27ga9oIQ77cPcDM7/bKBUsvo4rk/ZFdsTzx2w= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=IPkVN2EQ; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="IPkVN2EQ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 92AE3C2BD10; Tue, 14 May 2024 10:44:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1715683467; bh=+dfb71cBrElcnunDduxpHuLMwJ9BInceTavh/eHbqMk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=IPkVN2EQVW3pW61RWCbgnU+KJ5jQ84gCBnYbCie4Naq3N6cgwBVpytEYEaxVeayeK ud/vP2HVFLj0sp9hkCU+R44Al3rA2QKT5u3b/FyH4EwEiGKpz+FqLV2wX2edT26DSL R7siA+AKw2lVISIZJRStXs+sbrN4PNyRYB6Y3SY0= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Lukasz Majewski , Simon Horman , Jakub Kicinski , Sasha Levin Subject: [PATCH 6.8 222/336] hsr: Simplify code for announcing HSR nodes timer setup Date: Tue, 14 May 2024 12:17:06 +0200 Message-ID: <20240514101046.996886922@linuxfoundation.org> X-Mailer: git-send-email 2.45.0 In-Reply-To: <20240514101038.595152603@linuxfoundation.org> References: <20240514101038.595152603@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.8-stable review patch. If anyone has any objections, please let me know. ------------------ From: Lukasz Majewski [ Upstream commit 4893b8b3ef8db2b182d1a1bebf6c7acf91405000 ] Up till now the code to start HSR announce timer, which triggers sending supervisory frames, was assuming that hsr_netdev_notify() would be called at least twice for hsrX interface. This was required to have different values for old and current values of network device's operstate. This is problematic for a case where hsrX interface is already in the operational state when hsr_netdev_notify() is called, so timer is not configured to trigger and as a result the hsrX is not sending supervisory frames to HSR ring. This error has been discovered when hsr_ping.sh script was run. To be more specific - for the hsr1 and hsr2 the hsr_netdev_notify() was called at least twice with different IF_OPER_{LOWERDOWN|DOWN|UP} states assigned in hsr_check_carrier_and_operstate(hsr). As a result there was no issue with sending supervisory frames. However, with hsr3, the notify function was called only once with operstate set to IF_OPER_UP and timer responsible for triggering supervisory frames was not fired. The solution is to use netif_oper_up() and netif_running() helper functions to assess if network hsrX device is up. Only then, when the timer is not already pending, it is started. Otherwise it is deactivated. Fixes: f421436a591d ("net/hsr: Add support for the High-availability Seamless Redundancy protocol (HSRv0)") Signed-off-by: Lukasz Majewski Reviewed-by: Simon Horman Link: https://lore.kernel.org/r/20240507111214.3519800-1-lukma@denx.de Signed-off-by: Jakub Kicinski Signed-off-by: Sasha Levin --- net/hsr/hsr_device.c | 27 ++++++++++++--------------- 1 file changed, 12 insertions(+), 15 deletions(-) diff --git a/net/hsr/hsr_device.c b/net/hsr/hsr_device.c index be0e43f46556e..03a42de7511e8 100644 --- a/net/hsr/hsr_device.c +++ b/net/hsr/hsr_device.c @@ -71,39 +71,36 @@ static bool hsr_check_carrier(struct hsr_port *master) return false; } -static void hsr_check_announce(struct net_device *hsr_dev, - unsigned char old_operstate) +static void hsr_check_announce(struct net_device *hsr_dev) { struct hsr_priv *hsr; hsr = netdev_priv(hsr_dev); - - if (READ_ONCE(hsr_dev->operstate) == IF_OPER_UP && old_operstate != IF_OPER_UP) { - /* Went up */ - hsr->announce_count = 0; - mod_timer(&hsr->announce_timer, - jiffies + msecs_to_jiffies(HSR_ANNOUNCE_INTERVAL)); + if (netif_running(hsr_dev) && netif_oper_up(hsr_dev)) { + /* Enable announce timer and start sending supervisory frames */ + if (!timer_pending(&hsr->announce_timer)) { + hsr->announce_count = 0; + mod_timer(&hsr->announce_timer, jiffies + + msecs_to_jiffies(HSR_ANNOUNCE_INTERVAL)); + } + } else { + /* Deactivate the announce timer */ + timer_delete(&hsr->announce_timer); } - - if (READ_ONCE(hsr_dev->operstate) != IF_OPER_UP && old_operstate == IF_OPER_UP) - /* Went down */ - del_timer(&hsr->announce_timer); } void hsr_check_carrier_and_operstate(struct hsr_priv *hsr) { struct hsr_port *master; - unsigned char old_operstate; bool has_carrier; master = hsr_port_get_hsr(hsr, HSR_PT_MASTER); /* netif_stacked_transfer_operstate() cannot be used here since * it doesn't set IF_OPER_LOWERLAYERDOWN (?) */ - old_operstate = READ_ONCE(master->dev->operstate); has_carrier = hsr_check_carrier(master); hsr_set_operstate(master, has_carrier); - hsr_check_announce(master->dev, old_operstate); + hsr_check_announce(master->dev); } int hsr_get_max_mtu(struct hsr_priv *hsr) -- 2.43.0