From patchwork Sun Feb 7 08:22:51 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ido Schimmel X-Patchwork-Id: 378343 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=-16.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, 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 8800FC433E0 for ; Sun, 7 Feb 2021 08:28:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3378664E73 for ; Sun, 7 Feb 2021 08:28:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230154AbhBGI2f (ORCPT ); Sun, 7 Feb 2021 03:28:35 -0500 Received: from new3-smtp.messagingengine.com ([66.111.4.229]:55889 "EHLO new3-smtp.messagingengine.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230051AbhBGIYn (ORCPT ); Sun, 7 Feb 2021 03:24:43 -0500 Received: from compute3.internal (compute3.nyi.internal [10.202.2.43]) by mailnew.nyi.internal (Postfix) with ESMTP id 958975801A6; Sun, 7 Feb 2021 03:23:40 -0500 (EST) Received: from mailfrontend2 ([10.202.2.163]) by compute3.internal (MEProxy); Sun, 07 Feb 2021 03:23:40 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:content-transfer-encoding:date:from :in-reply-to:message-id:mime-version:references:subject:to :x-me-proxy:x-me-proxy:x-me-sender:x-me-sender:x-sasl-enc; s= fm2; bh=durX5d6NI8cC2uK0fr5jIDaWAs32TUQoOX+SvmGJqhA=; b=Qxlio/re aub+8xUEj4ReEI/sG0dasYP2OMCnftylOW/m/b1whcl9RkhPtDQOA7OY/9/MPFcR IuTlOd2JSeqUG9IoyAnwgE2YcKXruVa0Z2DA6/kwDF6vdVP72HKg54BYe/FpYuGN AGEiI8HqYeLy1XXzeRaudFQxjqat3VRYGv2X1gpfRJp3ySvcF82jXlE+P+C7evrd iGKbxn4ut37B4RXPF/PuSi9QoydWWWrstXs3YsttMlT83G9u3i6GSQeaHpA7OCxd Ex03dhHx9F+DIOo84t+MVFPNZZu55M1ozlHyp1p32fKAyMDgWgEZVjZ247OKfk3e B7hYkdYZAocmsw== X-ME-Sender: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgeduledrhedtgddvjecutefuodetggdotefrodftvf curfhrohhfihhlvgemucfhrghsthforghilhdpqfgfvfdpuffrtefokffrpgfnqfghnecu uegrihhlohhuthemuceftddtnecunecujfgurhephffvufffkffojghfggfgsedtkeertd ertddtnecuhfhrohhmpefkughoucfutghhihhmmhgvlhcuoehiughoshgthhesihguohhs tghhrdhorhhgqeenucggtffrrghtthgvrhhnpeduteeiveffffevleekleejffekhfekhe fgtdfftefhledvjefggfehgfevjeekhfenucfkphepkeegrddvvdelrdduheefrdeggeen ucevlhhushhtvghrufhiiigvpedunecurfgrrhgrmhepmhgrihhlfhhrohhmpehiughosh gthhesihguohhstghhrdhorhhg X-ME-Proxy: Received: from shredder.lan (igld-84-229-153-44.inter.net.il [84.229.153.44]) by mail.messagingengine.com (Postfix) with ESMTPA id B5B5F1080057; Sun, 7 Feb 2021 03:23:37 -0500 (EST) From: Ido Schimmel To: netdev@vger.kernel.org Cc: davem@davemloft.net, kuba@kernel.org, dsahern@gmail.com, jiri@nvidia.com, yoshfuji@linux-ipv6.org, amcohen@nvidia.com, roopa@nvidia.com, bpoirier@nvidia.com, sharpd@nvidia.com, mlxsw@nvidia.com, Ido Schimmel Subject: [PATCH net-next 03/10] IPv4: Extend 'fib_notify_on_flag_change' sysctl Date: Sun, 7 Feb 2021 10:22:51 +0200 Message-Id: <20210207082258.3872086-4-idosch@idosch.org> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210207082258.3872086-1-idosch@idosch.org> References: <20210207082258.3872086-1-idosch@idosch.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Amit Cohen Add the value '2' to 'fib_notify_on_flag_change' to allow sending notifications only for failed route installation. Separate value is added for such notifications because there are less of them, so they do not impact performance and some users will find them more important. Signed-off-by: Amit Cohen Signed-off-by: Ido Schimmel --- Documentation/networking/ip-sysctl.rst | 3 ++- net/ipv4/fib_trie.c | 6 ++++++ net/ipv4/sysctl_net_ipv4.c | 2 +- 3 files changed, 9 insertions(+), 2 deletions(-) diff --git a/Documentation/networking/ip-sysctl.rst b/Documentation/networking/ip-sysctl.rst index 61a358301f12..cd0ec577a5b5 100644 --- a/Documentation/networking/ip-sysctl.rst +++ b/Documentation/networking/ip-sysctl.rst @@ -180,7 +180,7 @@ min_adv_mss - INTEGER fib_notify_on_flag_change - INTEGER Whether to emit RTM_NEWROUTE notifications whenever RTM_F_OFFLOAD/ - RTM_F_TRAP flags are changed. + RTM_F_TRAP/RTM_F_OFFLOAD_FAILED flags are changed. After installing a route to the kernel, user space receives an acknowledgment, which means the route was installed in the kernel, @@ -197,6 +197,7 @@ fib_notify_on_flag_change - INTEGER - 0 - Do not emit notifications. - 1 - Emit notifications. + - 2 - Emit notifications only for RTM_F_OFFLOAD_FAILED flag change. IP Fragmentation: diff --git a/net/ipv4/fib_trie.c b/net/ipv4/fib_trie.c index 80147caa9bfd..25cf387cca5b 100644 --- a/net/ipv4/fib_trie.c +++ b/net/ipv4/fib_trie.c @@ -1053,6 +1053,12 @@ void fib_alias_hw_flags_set(struct net *net, const struct fib_rt_info *fri) fa_match->offload = fri->offload; fa_match->trap = fri->trap; + + /* 2 means send notifications only if offload_failed was changed. */ + if (net->ipv4.sysctl_fib_notify_on_flag_change == 2 && + fa_match->offload_failed == fri->offload_failed) + goto out; + fa_match->offload_failed = fri->offload_failed; if (!net->ipv4.sysctl_fib_notify_on_flag_change) diff --git a/net/ipv4/sysctl_net_ipv4.c b/net/ipv4/sysctl_net_ipv4.c index e5798b3b59d2..f55095d3ed16 100644 --- a/net/ipv4/sysctl_net_ipv4.c +++ b/net/ipv4/sysctl_net_ipv4.c @@ -1361,7 +1361,7 @@ static struct ctl_table ipv4_net_table[] = { .mode = 0644, .proc_handler = proc_dointvec_minmax, .extra1 = SYSCTL_ZERO, - .extra2 = SYSCTL_ONE, + .extra2 = &two, }, { } };