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Mon, 29 Mar 2021 21:52:31 +0000 Received: from YQXPR0101MB0968.CANPRD01.PROD.OUTLOOK.COM ([fe80::1c05:585a:132a:f08e]) by YQXPR0101MB0968.CANPRD01.PROD.OUTLOOK.COM ([fe80::1c05:585a:132a:f08e%4]) with mapi id 15.20.3977.033; Mon, 29 Mar 2021 21:52:31 +0000 From: Rick Macklem To: freebsd-stable Subject: FreeBSD NFSv4.1/4.2 server is broken when Linux mounts use "nconnects" Thread-Topic: FreeBSD NFSv4.1/4.2 server is broken when Linux mounts use "nconnects" Thread-Index: AQHXJOSNRrD5HzlJfk2Se+qkw1812A== Date: Mon, 29 Mar 2021 21:52:31 +0000 Message-ID: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 80b8c043-1fe4-4617-5433-08d8f2fcf444 x-ms-traffictypediagnostic: YQXPR01MB2662: x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:9508; x-ms-exchange-senderadcheck: 1 x-microsoft-antispam: BCL:0; x-microsoft-antispam-message-info: 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 x-forefront-antispam-report: CIP:255.255.255.255; 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RWL_MAILSPIKE_POSSIBLE(0.00)[40.107.66.72:from] X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 29 Mar 2021 21:52:35 -0000 Hi,=0A= =0A= The FreeBSD NFS server is broken when handling multiple=0A= connections for NFSv4.1/4.2.=0A= It incorrectly binds the back channel to a new connection=0A= when is sees an RPC with Sequence in it (almost all RPCs)=0A= and might send a callback on the wrong connection.=0A= =0A= I have a fix, but it won't be in a release until 12.3/13.1.=0A= It can be found in Bugzilla PR#254560.=0A= =0A= In the meantime, avoid using the "nconnects" option=0A= on Linux client mounts.=0A= =0A= Thanks go to Ben Coddington @redhat for diagnosing=0A= this and testing the patch.=0A= =0A= Sorry about the breakage, rick=0A= ps: It was done intentionally long ago, when clients=0A= did not do BindConnectionToSession and then slipped=0A= through the cracks.=0A=