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Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Shuah Khan CC: "netdev@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "linux-kselftest@vger.kernel.org" , Ido Schimmel Subject: [PATCH net-next v2 1/4] nexthop: Factor out hash threshold fdb nexthop selection Thread-Topic: [PATCH net-next v2 1/4] nexthop: Factor out hash threshold fdb nexthop selection Thread-Index: Adm6SOo2pRJ1b9JTe0qaFpcgHytNCA== Date: Wed, 19 Jul 2023 13:57:11 +0000 Message-ID: <20230719-nh_select-v2-1-04383e89f868@nvidia.com> References: <20230719-nh_select-v2-0-04383e89f868@nvidia.com> In-Reply-To: <20230719-nh_select-v2-0-04383e89f868@nvidia.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-clientproxiedby: YQBPR01CA0111.CANPRD01.PROD.OUTLOOK.COM (2603:10b6:c01:1::11) To MN2PR12MB4373.namprd12.prod.outlook.com (2603:10b6:208:261::8) x-mailer: b4 0.12.2 authentication-results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=nvidia.com; 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Since this does not apply to fdb nexthops, simplify the loop by moving the fdb nexthop selection to its own function. Signed-off-by: Ido Schimmel Signed-off-by: Benjamin Poirier Reviewed-by: David Ahern --- net/ipv4/nexthop.c | 22 ++++++++++++++++++++-- 1 file changed, 20 insertions(+), 2 deletions(-) diff --git a/net/ipv4/nexthop.c b/net/ipv4/nexthop.c index f95142e56da0..27089dea0ed0 100644 --- a/net/ipv4/nexthop.c +++ b/net/ipv4/nexthop.c @@ -1152,11 +1152,31 @@ static bool ipv4_good_nh(const struct fib_nh *nh) return !!(state & NUD_VALID); } +static struct nexthop *nexthop_select_path_fdb(struct nh_group *nhg, int hash) +{ + int i; + + for (i = 0; i < nhg->num_nh; i++) { + struct nh_grp_entry *nhge = &nhg->nh_entries[i]; + + if (hash > atomic_read(&nhge->hthr.upper_bound)) + continue; + + return nhge->nh; + } + + WARN_ON_ONCE(1); + return NULL; +} + static struct nexthop *nexthop_select_path_hthr(struct nh_group *nhg, int hash) { struct nexthop *rc = NULL; int i; + if (nhg->fdb_nh) + return nexthop_select_path_fdb(nhg, hash); + for (i = 0; i < nhg->num_nh; ++i) { struct nh_grp_entry *nhge = &nhg->nh_entries[i]; struct nh_info *nhi; @@ -1165,8 +1185,6 @@ static struct nexthop *nexthop_select_path_hthr(struct nh_group *nhg, int hash) continue; nhi = rcu_dereference(nhge->nh->nh_info); - if (nhi->fdb_nh) - return nhge->nh; /* nexthops always check if it is good and does * not rely on a sysctl for this behavior From patchwork Wed Jul 19 13:57:16 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Benjamin Poirier X-Patchwork-Id: 13319033 X-Patchwork-Delegate: kuba@kernel.org Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (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 13E6C13FE0 for ; Wed, 19 Jul 2023 13:57:20 +0000 (UTC) Received: from NAM10-BN7-obe.outbound.protection.outlook.com (mail-bn7nam10on2074.outbound.protection.outlook.com [40.107.92.74]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A25C71724; Wed, 19 Jul 2023 06:57:18 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=Htr0M8fqOPdo0ZQUmDux4aWNKFM+AFgfaKgq1DoVvNhCXmbh0mIdvx6npmjO/Y25+maYRXLmqYd/XNYS7EjRKh/Kv3y/6r8Vy77sPUUtthJKd3aQL8C5AEynxzUdfgBE2Inx7xF7vvoHcGVgs0zWFN7qT7S5M3/CFbrflAqrZ/o7VT+xrt6lf/mBALVF+2ao5iqXStJL99GO+7km4gljmGzsj4QDxPTtaMD6CsyiVmT2TPTY30KcD5iB6vrcfp83cNTjopMqe2mikN2krNK3Czp9z5B7YJPvUdhwYve5H8VDLMNXISlLHNzoTPEMvEAf4oRse5zf1qzR5bHOpjlwCQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=5G7duKyBRwn33i/M0Orq92l5Mbix0iGcQuUUTFgRYXY=; b=AcDE73cdI6ULWf3Yvbard2MwmPbHfHuQCIIbXUdOrebJchCAHn/xM+/RlMBxv+JRKNVBIujK0dTe73MFX5RkBA7dsYFMRYG8jsGAu0M/hkRrPE5DXgKaOuPaQXy4c3doRGXU2yaHHUAHS5mF/4Qyjh4ubzA7FEIvXh4B4eY21ulGcTDpye1f7c3v7QUrz7/y7nMg6RvU3Hq312sqPFDpv0Y+AFAe6IZQFqRIuBQ3wugNqTIZt+CQku5oAJ8x5+hU53uYK4qLvnu9Xi33O0KethgnzC3kXx6jivf5R/2SntUpfKEJybNGC2DXj13HssoW2xnOChE+H1gmLkGTb5Cl5w== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=nvidia.com; dmarc=pass action=none header.from=nvidia.com; dkim=pass header.d=nvidia.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=Nvidia.com; s=selector2; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=5G7duKyBRwn33i/M0Orq92l5Mbix0iGcQuUUTFgRYXY=; b=Kw7AudvM5WaA+os5yY7N81/jEeJ4mxqKA1aakoTkPa8LLFAMSAENs1dQ6fr2lu3C8UGO3VqfKEUd9Q2qGRGVNWAaS7FozfE+DAEj6skE4Ol1WQbJK5MIV3xPrjhlMjaHNz8eIA5kYw2nBgfE9P8bm8ylvJ4972qoy1BYkYqE99kAbK3ML6aa4YUsfZ6u5OUtDP8TfrbDPP36psHW59GcQeLckYAG02ojWjC+zRTdQEmMsjf4SIR8i0dt5BojrDxv30uxOOkILBe6sEY3lkDTxddwoIqcmNwgRV/5uHUFLkkrascvr9CcvQ9o48CeIkoVlTPtmrM7RFpmozbmYvm5aQ== Received: from MN2PR12MB4373.namprd12.prod.outlook.com (2603:10b6:208:261::8) by SJ0PR12MB6687.namprd12.prod.outlook.com (2603:10b6:a03:47a::19) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6609.24; Wed, 19 Jul 2023 13:57:16 +0000 Received: from MN2PR12MB4373.namprd12.prod.outlook.com ([fe80::982f:232b:f4af:29ec]) by MN2PR12MB4373.namprd12.prod.outlook.com ([fe80::982f:232b:f4af:29ec%5]) with mapi id 15.20.6609.022; Wed, 19 Jul 2023 13:57:16 +0000 From: Benjamin Poirier To: David Ahern , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Shuah Khan CC: "netdev@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "linux-kselftest@vger.kernel.org" , Ido Schimmel Subject: [PATCH net-next v2 2/4] nexthop: Factor out neighbor validity check Thread-Topic: [PATCH net-next v2 2/4] nexthop: Factor out neighbor validity check Thread-Index: Adm6SO0RjClS2VcqDUm7NVFWUjJK/g== Date: Wed, 19 Jul 2023 13:57:16 +0000 Message-ID: <20230719-nh_select-v2-2-04383e89f868@nvidia.com> References: <20230719-nh_select-v2-0-04383e89f868@nvidia.com> In-Reply-To: <20230719-nh_select-v2-0-04383e89f868@nvidia.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-clientproxiedby: YQXP288CA0030.CANP288.PROD.OUTLOOK.COM (2603:10b6:c00:41::36) To MN2PR12MB4373.namprd12.prod.outlook.com (2603:10b6:208:261::8) x-mailer: b4 0.12.2 authentication-results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=nvidia.com; x-ms-publictraffictype: Email x-ms-traffictypediagnostic: MN2PR12MB4373:EE_|SJ0PR12MB6687:EE_ x-ms-office365-filtering-correlation-id: 843f0ad7-5f98-4caf-ac0b-08db88600f91 x-ms-exchange-senderadcheck: 1 x-ms-exchange-antispam-relay: 0 x-microsoft-antispam: BCL:0; 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In order to make the nexthop object code more similar to the legacy nexthop code, factor out the nexthop object neighbor validity check into its own function. Signed-off-by: Ido Schimmel Signed-off-by: Benjamin Poirier Reviewed-by: David Ahern --- net/ipv4/nexthop.c | 29 ++++++++++++++++------------- 1 file changed, 16 insertions(+), 13 deletions(-) diff --git a/net/ipv4/nexthop.c b/net/ipv4/nexthop.c index 27089dea0ed0..c12acbf39659 100644 --- a/net/ipv4/nexthop.c +++ b/net/ipv4/nexthop.c @@ -1152,6 +1152,20 @@ static bool ipv4_good_nh(const struct fib_nh *nh) return !!(state & NUD_VALID); } +static bool nexthop_is_good_nh(const struct nexthop *nh) +{ + struct nh_info *nhi = rcu_dereference(nh->nh_info); + + switch (nhi->family) { + case AF_INET: + return ipv4_good_nh(&nhi->fib_nh); + case AF_INET6: + return ipv6_good_nh(&nhi->fib6_nh); + } + + return false; +} + static struct nexthop *nexthop_select_path_fdb(struct nh_group *nhg, int hash) { int i; @@ -1179,26 +1193,15 @@ static struct nexthop *nexthop_select_path_hthr(struct nh_group *nhg, int hash) for (i = 0; i < nhg->num_nh; ++i) { struct nh_grp_entry *nhge = &nhg->nh_entries[i]; - struct nh_info *nhi; if (hash > atomic_read(&nhge->hthr.upper_bound)) continue; - nhi = rcu_dereference(nhge->nh->nh_info); - /* nexthops always check if it is good and does * not rely on a sysctl for this behavior */ - switch (nhi->family) { - case AF_INET: - if (ipv4_good_nh(&nhi->fib_nh)) - return nhge->nh; - break; - case AF_INET6: - if (ipv6_good_nh(&nhi->fib6_nh)) - return nhge->nh; - break; - } + if (nexthop_is_good_nh(nhge->nh)) + return nhge->nh; if (!rc) rc = nhge->nh; From patchwork Wed Jul 19 13:57:22 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Benjamin Poirier X-Patchwork-Id: 13319034 X-Patchwork-Delegate: kuba@kernel.org Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (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 9CE5813FE0 for ; Wed, 19 Jul 2023 13:57:29 +0000 (UTC) Received: from NAM10-BN7-obe.outbound.protection.outlook.com (mail-bn7nam10on2050.outbound.protection.outlook.com [40.107.92.50]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 66A041BF5; Wed, 19 Jul 2023 06:57:24 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=Yrtmbe4o94yrI2Sly2digJt5GyCs28ixFN3WwlHLOGFDBUZWU+5j5SFfadkh1KOEUUUQh9NzSHMA3kQYN+czX4Fi0xB7aLKJ8BQ4Pm74xStK8GTsxnTphrcMitHtRJ8LY8RoLqcjMEWabkehXoCdIzK+5OrWp7NgQVx6IHveG/Bi/YFbsjC7sQ+RgDImuBAqAr064Eqq4n+rr+ShBbyfTFFAiwCjpi9gZ5FgHgudhf213v0C9xDPkB+8yIOaCkRmd6Z1RFGYkSAqSUxSvMCYT8nK8Cx62pKc7k1AFsTXwhstiUu2VIIihnzn6ww0AXRqGoTl+c+C+5Ik4lJSaMguVQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=xxpO4bcWuo1MgkT2NiTuTmmshEYXt3etyzvEDEnQDdc=; b=KXeFyAMV53etekt76F0m6VpNOdd1g2qhclpP5r0ePB7caO7VdWrbcizTWRXfhpQfzssJJNKLdhhDM6ZvFIbHuYojL8p1A8D1YlVZ38FTyD3JSTC8PI2yom9/f7RvugFHoOwcLWy6Wui1IuPCKWrE38xbVqBthrmV+itP+b5GTddsLf2e9+62XTprBFOJzbX1TmPvMaIbwRKBDXLaDxdKODFAJ2b3X8+44nA4d85Qu1hZwsDnRViQbA08b0XaOGHVSJ0CzxNvsOI8IaBYWgfpnvlypcg0r25gWjXxOiDc5MaKzQwObERsTe68akodF8lV6/Ks5MS9L85SEFLRcUaE0A== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=nvidia.com; dmarc=pass action=none header.from=nvidia.com; dkim=pass header.d=nvidia.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=Nvidia.com; s=selector2; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=xxpO4bcWuo1MgkT2NiTuTmmshEYXt3etyzvEDEnQDdc=; b=M/QqG0RHUJ0mOgTGuSUhQwrO5g7m+/dfWUcagmAqyOqQlmhpJI5dA45PJBFk4u7q+Q7fMBmDZ4wbAf0H13Jz6TLvbzAP7NTBAgI1y/YFf9/7D+BwV/3jP9je3eX/tR+cibAK5YwZyHORiQdSUnQMRyNnH0CNyidkruDnflHqgaycatSn+YOc2q33gwD8rWw5JeE78nEWcYqile9KYhMCGn9Ks6A5y2cPBpc6YBFG801Htk7hvo95fc60ZtwWs/feCgzg7xjT73uUkqBSFCEM9VLBe0TFGZ7YK14L0DWh89L1nieKqBWcXdI4fxl7EBb4nU7zcmqMCmpd1+rS8s7qSw== Received: from MN2PR12MB4373.namprd12.prod.outlook.com (2603:10b6:208:261::8) by SJ0PR12MB6687.namprd12.prod.outlook.com (2603:10b6:a03:47a::19) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6609.24; Wed, 19 Jul 2023 13:57:22 +0000 Received: from MN2PR12MB4373.namprd12.prod.outlook.com ([fe80::982f:232b:f4af:29ec]) by MN2PR12MB4373.namprd12.prod.outlook.com ([fe80::982f:232b:f4af:29ec%5]) with mapi id 15.20.6609.022; Wed, 19 Jul 2023 13:57:22 +0000 From: Benjamin Poirier To: David Ahern , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Shuah Khan CC: "netdev@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "linux-kselftest@vger.kernel.org" , Ido Schimmel Subject: [PATCH net-next v2 3/4] nexthop: Do not return invalid nexthop object during multipath selection Thread-Topic: [PATCH net-next v2 3/4] nexthop: Do not return invalid nexthop object during multipath selection Thread-Index: Adm6SPCTjLnm6ZDF2UuYdzGvm4mP9w== Date: Wed, 19 Jul 2023 13:57:22 +0000 Message-ID: <20230719-nh_select-v2-3-04383e89f868@nvidia.com> References: <20230719-nh_select-v2-0-04383e89f868@nvidia.com> In-Reply-To: <20230719-nh_select-v2-0-04383e89f868@nvidia.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-clientproxiedby: YQXP288CA0028.CANP288.PROD.OUTLOOK.COM (2603:10b6:c00:41::40) To MN2PR12MB4373.namprd12.prod.outlook.com (2603:10b6:208:261::8) x-mailer: b4 0.12.2 authentication-results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=nvidia.com; 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OTOH, with nexthop objects, nexthop_select_path_hthr() may return a nexthop that failed the nexthop_is_good_nh() test even if there was one that passed. Refactor nexthop_select_path_hthr() to follow a selection logic more similar to fib_select_multipath(). The issue can be demonstrated with the following sequence of commands. The first block shows that things work as expected with legacy nexthops. The last sequence of `ip rou get` in the second block shows the problem case - some routes still use the .2 nexthop. sysctl net.ipv4.fib_multipath_use_neigh=1 ip link add dummy1 up type dummy ip rou add 198.51.100.0/24 nexthop via 192.0.2.1 dev dummy1 onlink nexthop via 192.0.2.2 dev dummy1 onlink for i in {10..19}; do ip -o rou get 198.51.100.$i; done ip neigh add 192.0.2.1 dev dummy1 nud failed echo ".1 failed:" # results should not use .1 for i in {10..19}; do ip -o rou get 198.51.100.$i; done ip neigh del 192.0.2.1 dev dummy1 ip neigh add 192.0.2.2 dev dummy1 nud failed echo ".2 failed:" # results should not use .2 for i in {10..19}; do ip -o rou get 198.51.100.$i; done ip link del dummy1 ip link add dummy1 up type dummy ip nexthop add id 1 via 192.0.2.1 dev dummy1 onlink ip nexthop add id 2 via 192.0.2.2 dev dummy1 onlink ip nexthop add id 1001 group 1/2 ip rou add 198.51.100.0/24 nhid 1001 for i in {10..19}; do ip -o rou get 198.51.100.$i; done ip neigh add 192.0.2.1 dev dummy1 nud failed echo ".1 failed:" # results should not use .1 for i in {10..19}; do ip -o rou get 198.51.100.$i; done ip neigh del 192.0.2.1 dev dummy1 ip neigh add 192.0.2.2 dev dummy1 nud failed echo ".2 failed:" # results should not use .2 for i in {10..19}; do ip -o rou get 198.51.100.$i; done ip link del dummy1 Signed-off-by: Ido Schimmel Signed-off-by: Benjamin Poirier Reviewed-by: David Ahern --- net/ipv4/nexthop.c | 14 ++++++++------ 1 file changed, 8 insertions(+), 6 deletions(-) diff --git a/net/ipv4/nexthop.c b/net/ipv4/nexthop.c index c12acbf39659..93f14d39fef6 100644 --- a/net/ipv4/nexthop.c +++ b/net/ipv4/nexthop.c @@ -1194,20 +1194,22 @@ static struct nexthop *nexthop_select_path_hthr(struct nh_group *nhg, int hash) for (i = 0; i < nhg->num_nh; ++i) { struct nh_grp_entry *nhge = &nhg->nh_entries[i]; - if (hash > atomic_read(&nhge->hthr.upper_bound)) - continue; - /* nexthops always check if it is good and does * not rely on a sysctl for this behavior */ - if (nexthop_is_good_nh(nhge->nh)) - return nhge->nh; + if (!nexthop_is_good_nh(nhge->nh)) + continue; if (!rc) rc = nhge->nh; + + if (hash > atomic_read(&nhge->hthr.upper_bound)) + continue; + + return nhge->nh; } - return rc; + return rc ? : nhg->nh_entries[0].nh; } static struct nexthop *nexthop_select_path_res(struct nh_group *nhg, int hash) From patchwork Wed Jul 19 13:57:27 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Benjamin Poirier X-Patchwork-Id: 13319035 X-Patchwork-Delegate: kuba@kernel.org Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (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 D6D9E13FE0 for ; Wed, 19 Jul 2023 13:57:43 +0000 (UTC) Received: from NAM10-BN7-obe.outbound.protection.outlook.com (mail-bn7nam10on2050.outbound.protection.outlook.com [40.107.92.50]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9E68A1FFB; Wed, 19 Jul 2023 06:57:29 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=LCVrFmt5NKhRTsGhnlgU6ohT9/+6HK9tEwzn4JDeIz805o+ky1WjX4zXEQTKlz2ZPp+J4ComvIq++VggrUUZbVotQktsIHG9PWKbrdqVTbp/30Esx0emdb/LvEZ0iGSl/IrwSM4z+NC1NwLk2oPWoskFlg0MOF2whsDljg8wAo1TXjy9H6R21bpxJWFB1AklDkciYPt/MGq/YIIBhX3MU2mx6FR5vp9gXq8tc2VB3fZmld7oP4Kk4ErAHD0CBbeh5Rbx1+Y1f9n+7JTF4bVbSJh4/CN6Blbg4C2FgaDcePOk4S5EjnbJWD2sZwD58AANX2m6pqI+DCEfYWdSMWtt1w== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=mHreOrxHmeQscue0UYzAUvLaEA5x2VQ2tDaoVTf6vR0=; b=Y6J7dLe3Bv6QXEFDj2Dv8aqd6p2Q3vWX2094cjd9tdaeMX6vHcq0M/xmdqHRS0gCa8NRgCxb4vzk76n1uiRGLMM23Oc9+dxYsAtxazwqKphKxlWlHIeJmE+u2E30TvDc72k0UrTxkaAor+Nf+H9tQzzxWGGzvpbxnWWdFkah/9+5DRipGs2S7fv023fxSmuMZtzfc45mpM9LvvN+ehc8Bp3n5Ue0kFlBDutcQSyesMvvhyDPWRu5BrmotvPEbMSpf/qcpc1fnngxFR7kFjfaNxbB2ACm+GrcOqqNq+XDIei5ESPsjNqBAEPSS0IIe2Cthvn/lPM+3nABOrkf00VJfQ== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=nvidia.com; dmarc=pass action=none header.from=nvidia.com; dkim=pass header.d=nvidia.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=Nvidia.com; s=selector2; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=mHreOrxHmeQscue0UYzAUvLaEA5x2VQ2tDaoVTf6vR0=; b=Pk0fRJ5l0cwtD8YsmKLHbSOJOYWr/ClDW1npDFvUJyo//FBFSEGnvPi+UXz65p56S5KgRjviXRwUCdV//QwQAN7d3004baNUnl+uIe5V/7SLOL3DTHa5A8EMPLRWcuhjn1JH0OXyqE3JRZV2ZP98yrETbwwIJLCQV1Kv3LZFdMrpBipCGUs1kszEJAr4Al5rz7UYKBB7lX3yEBXFWbq+HVRBb+/9O8IqOSX6muNlPn0JSe19K/muhbfUsTiUS4hf27bEH7Q+FwkECbQ5JOVPvLAgsTRFOB5HEAFKzbd4vduPVZgpC+vBdR5no/X40lWYrCOpmx76AvXoQMEy1PqDLQ== Received: from MN2PR12MB4373.namprd12.prod.outlook.com (2603:10b6:208:261::8) by SJ0PR12MB6687.namprd12.prod.outlook.com (2603:10b6:a03:47a::19) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6609.24; Wed, 19 Jul 2023 13:57:27 +0000 Received: from MN2PR12MB4373.namprd12.prod.outlook.com ([fe80::982f:232b:f4af:29ec]) by MN2PR12MB4373.namprd12.prod.outlook.com ([fe80::982f:232b:f4af:29ec%5]) with mapi id 15.20.6609.022; Wed, 19 Jul 2023 13:57:27 +0000 From: Benjamin Poirier To: David Ahern , "David S. 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Check that a nexthop with invalid neighbor is not selected when there is another nexthop with a valid neighbor. Check that there is no crash when there is no nexthop with a valid neighbor. The first test fails before the previous commit in this series. Signed-off-by: Benjamin Poirier Reviewed-by: David Ahern --- tools/testing/selftests/net/fib_nexthops.sh | 129 ++++++++++++++++++++++++++++ 1 file changed, 129 insertions(+) diff --git a/tools/testing/selftests/net/fib_nexthops.sh b/tools/testing/selftests/net/fib_nexthops.sh index 0f5e88c8f4ff..54ec2b7b7b8c 100755 --- a/tools/testing/selftests/net/fib_nexthops.sh +++ b/tools/testing/selftests/net/fib_nexthops.sh @@ -29,6 +29,7 @@ IPV4_TESTS=" ipv4_large_res_grp ipv4_compat_mode ipv4_fdb_grp_fcnal + ipv4_mpath_select ipv4_torture ipv4_res_torture " @@ -42,6 +43,7 @@ IPV6_TESTS=" ipv6_large_res_grp ipv6_compat_mode ipv6_fdb_grp_fcnal + ipv6_mpath_select ipv6_torture ipv6_res_torture " @@ -370,6 +372,27 @@ check_large_res_grp() log_test $? 0 "Dump large (x$buckets) nexthop buckets" } +get_route_dev() +{ + local pfx="$1" + local out + + if out=$($IP -j route get "$pfx" | jq -re ".[0].dev"); then + echo "$out" + fi +} + +check_route_dev() +{ + local pfx="$1" + local expected="$2" + local out + + out=$(get_route_dev "$pfx") + + check_output "$out" "$expected" +} + start_ip_monitor() { local mtype=$1 @@ -575,6 +598,112 @@ ipv4_fdb_grp_fcnal() $IP link del dev vx10 } +ipv4_mpath_select() +{ + local rc dev match h addr + + echo + echo "IPv4 multipath selection" + echo "------------------------" + if [ ! -x "$(command -v jq)" ]; then + echo "SKIP: Could not run test; need jq tool" + return $ksft_skip + fi + + # Use status of existing neighbor entry when determining nexthop for + # multipath routes. + local -A gws + gws=([veth1]=172.16.1.2 [veth3]=172.16.2.2) + local -A other_dev + other_dev=([veth1]=veth3 [veth3]=veth1) + + run_cmd "$IP nexthop add id 1 via ${gws["veth1"]} dev veth1" + run_cmd "$IP nexthop add id 2 via ${gws["veth3"]} dev veth3" + run_cmd "$IP nexthop add id 1001 group 1/2" + run_cmd "$IP ro add 172.16.101.0/24 nhid 1001" + rc=0 + for dev in veth1 veth3; do + match=0 + for h in {1..254}; do + addr="172.16.101.$h" + if [ "$(get_route_dev "$addr")" = "$dev" ]; then + match=1 + break + fi + done + if (( match == 0 )); then + echo "SKIP: Did not find a route using device $dev" + return $ksft_skip + fi + run_cmd "$IP neigh add ${gws[$dev]} dev $dev nud failed" + if ! check_route_dev "$addr" "${other_dev[$dev]}"; then + rc=1 + break + fi + run_cmd "$IP neigh del ${gws[$dev]} dev $dev" + done + log_test $rc 0 "Use valid neighbor during multipath selection" + + run_cmd "$IP neigh add 172.16.1.2 dev veth1 nud incomplete" + run_cmd "$IP neigh add 172.16.2.2 dev veth3 nud incomplete" + run_cmd "$IP route get 172.16.101.1" + # if we did not crash, success + log_test $rc 0 "Multipath selection with no valid neighbor" +} + +ipv6_mpath_select() +{ + local rc dev match h addr + + echo + echo "IPv6 multipath selection" + echo "------------------------" + if [ ! -x "$(command -v jq)" ]; then + echo "SKIP: Could not run test; need jq tool" + return $ksft_skip + fi + + # Use status of existing neighbor entry when determining nexthop for + # multipath routes. + local -A gws + gws=([veth1]=2001:db8:91::2 [veth3]=2001:db8:92::2) + local -A other_dev + other_dev=([veth1]=veth3 [veth3]=veth1) + + run_cmd "$IP nexthop add id 1 via ${gws["veth1"]} dev veth1" + run_cmd "$IP nexthop add id 2 via ${gws["veth3"]} dev veth3" + run_cmd "$IP nexthop add id 1001 group 1/2" + run_cmd "$IP ro add 2001:db8:101::/64 nhid 1001" + rc=0 + for dev in veth1 veth3; do + match=0 + for h in {1..65535}; do + addr=$(printf "2001:db8:101::%x" $h) + if [ "$(get_route_dev "$addr")" = "$dev" ]; then + match=1 + break + fi + done + if (( match == 0 )); then + echo "SKIP: Did not find a route using device $dev" + return $ksft_skip + fi + run_cmd "$IP neigh add ${gws[$dev]} dev $dev nud failed" + if ! check_route_dev "$addr" "${other_dev[$dev]}"; then + rc=1 + break + fi + run_cmd "$IP neigh del ${gws[$dev]} dev $dev" + done + log_test $rc 0 "Use valid neighbor during multipath selection" + + run_cmd "$IP neigh add 2001:db8:91::2 dev veth1 nud incomplete" + run_cmd "$IP neigh add 2001:db8:92::2 dev veth3 nud incomplete" + run_cmd "$IP route get 2001:db8:101::1" + # if we did not crash, success + log_test $rc 0 "Multipath selection with no valid neighbor" +} + ################################################################################ # basic operations (add, delete, replace) on nexthops and nexthop groups #