From patchwork Mon Mar 22 20:09:36 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Konstantin Shelekhin X-Patchwork-Id: 406380 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=-13.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, HEADER_FROM_DIFFERENT_DOMAINS, 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 0A6E4C433DB for ; Mon, 22 Mar 2021 20:10:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C80C86198E for ; Mon, 22 Mar 2021 20:10:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230479AbhCVUKX (ORCPT ); Mon, 22 Mar 2021 16:10:23 -0400 Received: from mta-02.yadro.com ([89.207.88.252]:33766 "EHLO mta-01.yadro.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S229771AbhCVUKA (ORCPT ); Mon, 22 Mar 2021 16:10:00 -0400 Received: from localhost (unknown [127.0.0.1]) by mta-01.yadro.com (Postfix) with ESMTP id 2784F41241; Mon, 22 Mar 2021 20:09:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=yadro.com; h= content-type:content-type:content-transfer-encoding:mime-version :x-mailer:message-id:date:date:subject:subject:from:from :received:received:received; s=mta-01; t=1616443798; x= 1618258199; bh=Eo8NzvTI0JpVuMWJEC88TNXK9BbNf8g0phv16kBufYw=; b=k 8/5S0fYUwy39VMehTz3J+JvRg7/hHjyTUfWdZ+4UPpBCPRYFHYDltN7rgdJdC2mq TDK0qM6MMQhHKglhScvROPLYbq7fQBmrgsKE4X3/1G6tjtD7QIxrbJho0axSmMVc ALfazH+REaBgZAwLbjrZTIX9h3UJ51EJxMjV7CuzwE= X-Virus-Scanned: amavisd-new at yadro.com Received: from mta-01.yadro.com ([127.0.0.1]) by localhost (mta-01.yadro.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id FMMjXLmS4qgs; Mon, 22 Mar 2021 23:09:58 +0300 (MSK) Received: from T-EXCH-03.corp.yadro.com (t-exch-03.corp.yadro.com [172.17.100.103]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA384 (256/256 bits)) (No client certificate requested) by mta-01.yadro.com (Postfix) with ESMTPS id E8FF441220; Mon, 22 Mar 2021 23:09:57 +0300 (MSK) Received: from yadro.com (10.199.0.64) by T-EXCH-03.corp.yadro.com (172.17.100.103) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P384) id 15.1.669.32; Mon, 22 Mar 2021 23:09:57 +0300 From: Konstantin Shelekhin To: Martin Petersen , Mike Christie , CC: , , Konstantin Shelekhin Subject: [PATCH v2 0/2] target: Introduce dummy devices Date: Mon, 22 Mar 2021 23:09:36 +0300 Message-ID: <20210322200938.53300-1-k.shelekhin@yadro.com> X-Mailer: git-send-email 2.31.0 MIME-Version: 1.0 X-Originating-IP: [10.199.0.64] X-ClientProxiedBy: T-EXCH-01.corp.yadro.com (172.17.10.101) To T-EXCH-03.corp.yadro.com (172.17.100.103) Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org This patch series (inspired by SCST) adds support for the dummy devices via the new DUMMY flag of rd_mcp. The rationale behind the change is to give a user the ability to create conifgurable devices for LUN 0 with custom WWN values (like vendor, product or revision) as some tools like QConvergeGUI use LUN 0 to identify the whole storage. The advantage over simply creating a NULLIO rd_mcp device is that the DUMMY device will not be seen as a block device, hence less confusion for the system administrator. Konstantin Shelekhin (2): target: Add the DUMMY flag to rd_mcp target: Make the virtual LUN 0 device dummy drivers/target/target_core_device.c | 2 +- drivers/target/target_core_rd.c | 27 +++++++++++++++++++++++---- drivers/target/target_core_rd.h | 1 + drivers/target/target_core_spc.c | 6 +----- 4 files changed, 26 insertions(+), 10 deletions(-) Reviewed-by: Mike Christie