From patchwork Mon Feb 8 20:42:51 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Petr Machata X-Patchwork-Id: 12076523 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-19.3 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 70AD3C433E9 for ; Mon, 8 Feb 2021 20:49:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2C9D564E7A for ; Mon, 8 Feb 2021 20:49:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232897AbhBHUsw (ORCPT ); Mon, 8 Feb 2021 15:48:52 -0500 Received: from hqnvemgate26.nvidia.com ([216.228.121.65]:7071 "EHLO hqnvemgate26.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233465AbhBHUon (ORCPT ); Mon, 8 Feb 2021 15:44:43 -0500 Received: from hqmail.nvidia.com (Not Verified[216.228.121.13]) by hqnvemgate26.nvidia.com (using TLS: TLSv1.2, AES256-SHA) id ; Mon, 08 Feb 2021 12:43:47 -0800 Received: from DRHQMAIL107.nvidia.com (10.27.9.16) by HQMAIL105.nvidia.com (172.20.187.12) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Mon, 8 Feb 2021 20:43:47 +0000 Received: from yaviefel.local (172.20.145.6) by DRHQMAIL107.nvidia.com (10.27.9.16) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Mon, 8 Feb 2021 20:43:44 +0000 From: Petr Machata To: CC: David Ahern , "David S. Miller" , Jakub Kicinski , Ido Schimmel , "Petr Machata" Subject: [RFC PATCH 08/13] nexthop: Allow reporting activity of nexthop buckets Date: Mon, 8 Feb 2021 21:42:51 +0100 Message-ID: <3aad399ba65d7942546bb5ea53968cb299f58610.1612815058.git.petrm@nvidia.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: References: MIME-Version: 1.0 X-Originating-IP: [172.20.145.6] X-ClientProxiedBy: HQMAIL101.nvidia.com (172.20.187.10) To DRHQMAIL107.nvidia.com (10.27.9.16) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nvidia.com; s=n1; t=1612817027; bh=+C5mUoUIkKR1IRP6LILbRa8NPwM5Af8163tpbOTzj2M=; h=From:To:CC:Subject:Date:Message-ID:X-Mailer:In-Reply-To: References:MIME-Version:Content-Transfer-Encoding:Content-Type: X-Originating-IP:X-ClientProxiedBy; b=WcFe+sybruobLzYFQCKnw2KGTVjbZ2BoRgLdimKAsiM5XysKMrprrZcaux4a5E1H3 SnN0kxSWCEtWor8Bcmvk+TAdQciPS4upM/FuaJklSa3J3ADv5UvCoBKo6v4PutjKXq tLVbUfTK/LpeLvYzgwxj8v6OGDKGNwh22LDJ785hb6ilDuy/EhfIHfLc9GnhxS1ciN hSU30miK+zy0QrJF83rDmtuOQ/wM9JF7GrSuuGL/sjaD+bRG4klqTJdtyzAzyGhVWP ZS9TF209k/JBZg2+7XPMiVoPX3umUAqDoU+4GHJl9RC7yOBIizLFaXEM3hR5eanCMD 1X3DVFhjULexA== Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org X-Patchwork-State: RFC From: Ido Schimmel The kernel periodically checks the idle time of nexthop buckets to determine if they are idle and can be re-populated with a new nexthop. When the resilient nexthop group is offloaded to hardware, the kernel will not see activity on nexthop buckets unless it is reported from hardware. Add a function that can be periodically called by device drivers to report activity on nexthop buckets after querying it from the underlying device. Signed-off-by: Ido Schimmel Reviewed-by: Petr Machata Signed-off-by: Petr Machata --- include/net/nexthop.h | 2 ++ net/ipv4/nexthop.c | 35 +++++++++++++++++++++++++++++++++++ 2 files changed, 37 insertions(+) diff --git a/include/net/nexthop.h b/include/net/nexthop.h index e1c30584e601..406bf0d959c6 100644 --- a/include/net/nexthop.h +++ b/include/net/nexthop.h @@ -221,6 +221,8 @@ int unregister_nexthop_notifier(struct net *net, struct notifier_block *nb); void nexthop_set_hw_flags(struct net *net, u32 id, bool offload, bool trap); void nexthop_bucket_set_hw_flags(struct net *net, u32 id, u32 bucket_index, bool offload, bool trap); +void nexthop_res_grp_activity_update(struct net *net, u32 id, u32 num_buckets, + unsigned long *activity); /* caller is holding rcu or rtnl; no reference taken to nexthop */ struct nexthop *nexthop_find_by_id(struct net *net, u32 id); diff --git a/net/ipv4/nexthop.c b/net/ipv4/nexthop.c index aa5c8343ded7..0e80d34b20a7 100644 --- a/net/ipv4/nexthop.c +++ b/net/ipv4/nexthop.c @@ -3099,6 +3099,41 @@ void nexthop_bucket_set_hw_flags(struct net *net, u32 id, u32 bucket_index, } EXPORT_SYMBOL(nexthop_bucket_set_hw_flags); +void nexthop_res_grp_activity_update(struct net *net, u32 id, u32 num_buckets, + unsigned long *activity) +{ + struct nh_res_table *res_table; + struct nexthop *nexthop; + struct nh_group *nhg; + u32 i; + + rcu_read_lock(); + + nexthop = nexthop_find_by_id(net, id); + if (!nexthop || !nexthop->is_group) + goto out; + + nhg = rcu_dereference(nexthop->nh_grp); + if (!nhg->resilient) + goto out; + + /* Instead of silently ignoring some buckets, demand that the sizes + * be the same. + */ + if (num_buckets != nhg->res_table->num_nh_buckets) + goto out; + + res_table = rcu_dereference(nhg->res_table); + for (i = 0; i < num_buckets; i++) { + if (test_bit(i, activity)) + nh_res_bucket_set_busy(&res_table->nh_buckets[i]); + } + +out: + rcu_read_unlock(); +} +EXPORT_SYMBOL(nexthop_res_grp_activity_update); + static void __net_exit nexthop_net_exit(struct net *net) { rtnl_lock();