From patchwork Thu Jul 11 17:53:22 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chaitanya Kulkarni X-Patchwork-Id: 11040599 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id D4D98112C for ; Thu, 11 Jul 2019 17:53:56 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id C581728B35 for ; Thu, 11 Jul 2019 17:53:56 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id B9B0A28B37; Thu, 11 Jul 2019 17:53:56 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.7 required=2.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 5F12E28B35 for ; Thu, 11 Jul 2019 17:53:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728458AbfGKRx4 (ORCPT ); Thu, 11 Jul 2019 13:53:56 -0400 Received: from esa2.hgst.iphmx.com ([68.232.143.124]:53237 "EHLO esa2.hgst.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728355AbfGKRxz (ORCPT ); Thu, 11 Jul 2019 13:53:55 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=wdc.com; i=@wdc.com; q=dns/txt; s=dkim.wdc.com; t=1562867712; x=1594403712; h=from:to:cc:subject:date:message-id:in-reply-to: references; bh=gWfetoeiKPzHdzvdliRZb0O5EwrxdvdVo+6ayJ+HVq4=; b=blsfSutxdaudBptF8+DOs7an4+yK4cZZBmjJFkWIZoAP4CtBXpUFdoDv I0oKq9BQ2oYBmMI2y2tkdXqyeJoGWkwei5lbPP4bp8qoHgmoYjrTu5axO iy0uJhPJCXIV1SQB5l4glEL/2EE78QzPilU9O8qjXOceg2n+CGw0wIvm6 TUf7UZLVEe6bKisUulbyTJGU0YdkxozZKEHJQPdhNqs9ScS2RZ1ItKxab N0MZWdyUAkylVO1um0sC6hoszOgx74aUcnKm4I6FXwMFJMIYOT0vJDR9c 4MVd4m6CRLASEam3C4mrDKV9/UkVqBKZGdjkzHS+ucaDbcHvh5APUS7bX Q==; IronPort-SDR: 8xNu9M0XGHeOlUdHcJdlBKl8YOWZ4d0SddHGp5wzlNPaP+XZV67AGdgxwxzweRyPHPHYe8q5yS 1P72mHdEzmrUT57+HIi6dF+IgJ7ppqko7RPu+cJmtml8VzqJ5Pdpk0Tfu1qfEv3VZppXu3YctD /RhFdeSyYKbggOLILFgXUUK8gP8ghhK7GCuSTZp4e0P4xnXl97xZl4LqBJuo7uD0zP84u9m/z0 eEbqQ6D78aIeAzH/lQT/rY0vbSFuqHKx7B+UAcvViA8E1LO/Tkn5VTMsj64kYHeTA3uEJa+ben dXI= X-IronPort-AV: E=Sophos;i="5.63,479,1557158400"; d="scan'208";a="212743405" Received: from uls-op-cesaip02.wdc.com (HELO uls-op-cesaep02.wdc.com) ([199.255.45.15]) by ob1.hgst.iphmx.com with ESMTP; 12 Jul 2019 01:55:12 +0800 IronPort-SDR: agCcj3Wu1ZwEJHZiA/yD6KCrNvbx5L1LrJI7E4AXKT8l08Sv7eiTAXanSvCZvGi4UlMSBhfDlq OwtceuYzlTgCzBqmlIbSZyQ7irH9DWU3Pq+gjgbLDvJM1gO2o98TTWnvKd49FwgnDM2vx30PIK G57m9zswo6LwY8Kc223h3qajZ3AG1ztL8yXurMYB1XM2JVh6fK0wRtYsAao/iVr9HEx0fdK2Rm cUpMnI3t6dpyhcqwPJhwqsK2RnPHY5QhC6jd+ZkFGLpXFwHeECJhWvgTSCSL6iS3d9hH8u5Yb5 yUtdstfdElwH5D9xqsYqLiNK Received: from uls-op-cesaip02.wdc.com ([10.248.3.37]) by uls-op-cesaep02.wdc.com with ESMTP; 11 Jul 2019 10:52:32 -0700 IronPort-SDR: UPnRcSkmbyKysCRsHnaGx6AiVRdnEmpTunped8mvb7gl93NOXyj78HwCLfipHsX8rpuPIUvLIl 18e4WOq4KALXdJkENtsyoaB3DBf4JVHAFheE9S2asSPUyDOnBYc2+JVaOrx9G+fwrzUdV2Id7i gI+cVXXn3xvSuXt/5JDX+vq/f59SICySnmnc6+bAyjlqo29KbXO0m7KdIo4ZLrwypwqdWeIUUU dIiVhlK/EHbzWX+ndcvKMUg4DjL9Od18k5SKDUDNHHhwGHmv3cKYBTnS+0y/PBnA3JrzZaG0wD mOA= Received: from cvenusqemu.hgst.com ([10.202.66.73]) by uls-op-cesaip02.wdc.com with ESMTP; 11 Jul 2019 10:53:55 -0700 From: Chaitanya Kulkarni To: linux-block@vger.kernel.org Cc: axboe@kernel.dk, hch@lst.de, Chaitanya Kulkarni Subject: [PATCH 2/8] null_blk: add REQ_OP_WRITE_ZEROES config property Date: Thu, 11 Jul 2019 10:53:22 -0700 Message-Id: <20190711175328.16430-3-chaitanya.kulkarni@wdc.com> X-Mailer: git-send-email 2.17.0 In-Reply-To: <20190711175328.16430-1-chaitanya.kulkarni@wdc.com> References: <20190711175328.16430-1-chaitanya.kulkarni@wdc.com> Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This is a preparation patch for implementing the support for the write-zeroes operations for null_blk. We introduce a new bool flag write-zeroes for nullb_device structure so that user can either set this value through configfs when null_blk is memory backed or use module parameter. Following two patches are implementing respective support for REQ_OP_WRITE_ZEROES. Signed-off-by: Chaitanya Kulkarni --- drivers/block/null_blk.h | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/block/null_blk.h b/drivers/block/null_blk.h index 34b22d6523ba..ecd1e45f6eb9 100644 --- a/drivers/block/null_blk.h +++ b/drivers/block/null_blk.h @@ -63,6 +63,7 @@ struct nullb_device { bool power; /* power on/off the device */ bool memory_backed; /* if data is stored in memory */ bool discard; /* if support discard */ + bool write_zeroes; /* if support write_zeroes */ bool zoned; /* if device is zoned */ };