From patchwork Mon Feb 24 13:14:57 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefan Metzmacher X-Patchwork-Id: 11400473 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 8A6F314D5 for ; Mon, 24 Feb 2020 13:15:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6901920838 for ; Mon, 24 Feb 2020 13:15:48 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (3072-bit key) header.d=samba.org header.i=@samba.org header.b="RJZWCkCl" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727378AbgBXNPr (ORCPT ); Mon, 24 Feb 2020 08:15:47 -0500 Received: from hr2.samba.org ([144.76.82.148]:41842 "EHLO hr2.samba.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727299AbgBXNPr (ORCPT ); Mon, 24 Feb 2020 08:15:47 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=samba.org; s=42; h=Message-Id:Date:To:From:CC; bh=aLcRs5N88qrCXswR1F3toBdOgSIvOo3ZhHNcGVi5gxA=; b=RJZWCkClaiRs9lE1UDgBUCF6o9 ggLU1gXfDXNJMLny7aG2GsWRWLUO7BrmUxfoXHSLnsf7JFvtRxjVYeBhinK4ZMkYFutJ99dLEVAYq opD84esi2J4tC2GIKFfpYPzHsAeDBdoECRRnKEXINWKjeE0TDbSrz1RNnVo8csxg7NnrGlerCg/Wc iV+k7yoZABNYRYCIFVSs9DBQg46vB9M8BxYFj0r6RBbjD5V4ohTlrGZMDE7Ht1UhUoeVBOb6XxMWh SOTURlcSxPZO2HYJRTW9+4mredFZySTHGa3jZAuqEj3dRiO6YXWl7IfRWKvU7oxWE+BX6Xf2Yle56 qSY4YaSzfyLw2YBdZzzOwbwwbffkiooL2o2rncQjj2J52/+h3umoBm/PRW/hBC3wvWfBV5rhfKeJp T8p39YUCunOZIgnwKVw8thMX5rVRsXw7v/ebO7WPLqUR5+UsrTA33d4ZGICDjmDUa5EwreoTXj/Ld LambesqEHGa4zkUy+olc5Xhc; Received: from [127.0.0.2] (localhost [127.0.0.1]) by hr2.samba.org with esmtpsa (TLS1.3:ECDHE_RSA_CHACHA20_POLY1305:256) (Exim) id 1j6DaL-00061e-PJ for linux-cifs@vger.kernel.org; Mon, 24 Feb 2020 13:15:45 +0000 From: Stefan Metzmacher To: linux-cifs@vger.kernel.org Subject: [PATCH v1 00/13] Avoid reconnects of failed session setups on soft mounts Date: Mon, 24 Feb 2020 14:14:57 +0100 Message-Id: <20200224131510.20608-1-metze@samba.org> X-Mailer: git-send-email 2.17.1 MIME-Version: 1.0 Sender: linux-cifs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-cifs@vger.kernel.org Commit b0dd940e582b6a6 ("cifs: fail i/o on soft mounts if sessionsetup errors out") didn't fix the whole problem. New i/o requests still try reconnects on the wire. But we need to avoid that in order to avoid locking out the user account. The first patches consolidate the retry/reconnect handling between SMB1 and SMB2/3. Then we map STATUS_ACCOUNT_LOCKED_OUT also to -EACCES, as it's the follow up of STATUS_LOGON_FAILURE when the wrong password was used too often. Finally if we get -EACCES for a session setup on a soft mount, we'll turn the session into a CifsInvalidCredentials state and return -EKEYREVOKED for all i/o on the session, without trying to reconnect the network connection. In future we could add ways to recover such sessions. cifs_demultiplex_thread() is already prepared for that. I tested this with a trivial /proc/fs/cifs/ResetInvalidCredentials to reset all sessions, but I don't think that's something that should be used in production. For now the only way out is 'umount' (as before). metze