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Wed, 28 Feb 2024 08:24:55 +0000 From: =?utf-8?B?TGVuYSBXYW5nICjnjovlqJwp?= To: "davem@davemloft.net" , "kuba@kernel.org" , "pabeni@redhat.com" , "dsahern@kernel.org" , "edumazet@google.com" CC: "linux-kernel@vger.kernel.org" , "netdev@vger.kernel.org" , =?utf-8?B?U2hpbWluZyBDaGVuZyAo5oiQ6K+X5piOKQ==?= Subject: [PATCH net v2] Net:cache didn't flush when ipv6 rule changed Thread-Topic: [PATCH net v2] Net:cache didn't flush when ipv6 rule changed Thread-Index: AQHaah+c6oKxRhQg9Uub4r5oXRowsw== Date: Wed, 28 Feb 2024 08:24:55 +0000 Message-ID: <696e39599c7a5e793a9d96aceef0e34817ab0bb2.camel@mediatek.com> References: <3efcbaf0872481d1a842eb9e18fa368b4b94d940.camel@mediatek.com> In-Reply-To: <3efcbaf0872481d1a842eb9e18fa368b4b94d940.camel@mediatek.com> Accept-Language: zh-CN, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=mediatek.com; x-ms-publictraffictype: Email x-ms-traffictypediagnostic: SEZPR03MB6466:EE_|SEYPR03MB6879:EE_ x-ms-office365-filtering-correlation-id: b24006d9-3f4c-4820-acfb-08dc3836be9a x-ms-exchange-senderadcheck: 1 x-ms-exchange-antispam-relay: 0 x-microsoft-antispam: BCL:0; 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charset="utf-8" Content-ID: Content-Transfer-Encoding: quoted-printable Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: SEZPR03MB6466.apcprd03.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: b24006d9-3f4c-4820-acfb-08dc3836be9a X-MS-Exchange-CrossTenant-originalarrivaltime: 28 Feb 2024 08:24:55.6763 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: a7687ede-7a6b-4ef6-bace-642f677fbe31 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: fnD8NGxGQthL5j8brUI5FHPFzHFargYVXTxHxo3MoQ4OS4V5ZtcVGBeaWcJ8IXKczypSjSsUaNNB27vSa6zn5w== X-MS-Exchange-Transport-CrossTenantHeadersStamped: SEYPR03MB6879 X-TM-AS-Product-Ver: SMEX-14.0.0.3152-9.1.1006-23728.005 X-TM-AS-Result: No-10--8.495200-8.000000 X-TMASE-MatchedRID: 8O9XrlnJpuwUN/8aAzvyJfVFR4sC8dPyWYu9PKwvg8/+TXZJvYxoecCS 2AMm1nQCqeCFN03ZT0c18T+UX/k6C4moXedGE6+KjWe5HOFKvuO+OYU/Hm95Gd9zZd3pUn7KmBy ZR5gLLj478mRVMHEjG17ZOWlZyFCqzB1CJ6qmdNpor4yxPAz7WUyQ5fRSh265CqIJhrrDy2/8/L 2o6LnOl1PEBxhgY10jzPswo+b23xfvk9E0156d6KDH6drx3JPVfS0Ip2eEHnylPA9G9KhcvZkw8 KdMzN86KrauXd3MZDV4aBaaKovc7xmgJDpdISDeemgtuhDgV3pkO0DDJG8LV4Z6qqfuZrRa X-TM-AS-User-Approved-Sender: No X-TM-AS-User-Blocked-Sender: No X-TMASE-Result: 10--8.495200-8.000000 X-TMASE-Version: SMEX-14.0.0.3152-9.1.1006-23728.005 X-TM-SNTS-SMTP: C92A945A6C14ECA83A1ECC3391208E8901DDC4F6EDD524C81638397F2A132D732000:8 From bf53859b379a653eec8a14fbb3f29286f9f888fb Mon Sep 17 00:00:00 2001 From: shiming cheng Date: Mon, 26 Feb 2024 20:17:58 +0800 Subject: [PATCH net v2] Net:cache didn't flush when ipv6 rule changed When changed from old rule&route configure to new one as below, ipv6 cache dst_entry did not change to new route table as no cache flush callback function, then forward to wrong out interface. When fib6_check dst_entry, the fib6_node version[fn_sernm] is always the same with socket dst_cookie, old cache dst_entry is always used and no chance to update. So we need to update fib6_node version when rule changed and flush cache to avoid dispatching a wrong interface. Signed-off-by: shiming cheng --- v2:=20 1. Add the fix tag. 2. Changes according to David Ahern's suggestions, modify flush functions same way as ipv4 flush cache and use tabs to aligh with existing code. --- --- net/ipv6/fib6_rules.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/net/ipv6/fib6_rules.c b/net/ipv6/fib6_rules.c index 7523c4baef35..52c04f0ac498 100644 --- a/net/ipv6/fib6_rules.c +++ b/net/ipv6/fib6_rules.c @@ -449,6 +449,11 @@ static size_t fib6_rule_nlmsg_payload(struct fib_rule *rule) + nla_total_size(16); /* src */ } =20 +static void fib6_rule_flush_cache(struct fib_rules_ops *ops) +{ + rt_genid_bump_ipv6(ops->fro_net); +} + static const struct fib_rules_ops __net_initconst fib6_rules_ops_template =3D { .family =3D AF_INET6, .rule_size =3D sizeof(struct fib6_rule), @@ -461,6 +466,7 @@ static const struct fib_rules_ops __net_initconst fib6_rules_ops_template =3D { .compare =3D fib6_rule_compare, .fill =3D fib6_rule_fill, .nlmsg_payload =3D fib6_rule_nlmsg_payload, + .flush_cache =3D fib6_rule_flush_cache, .nlgroup =3D RTNLGRP_IPV6_RULE, .owner =3D THIS_MODULE, .fro_net =3D &init_net, --=20 2.18.0