From mboxrd@z Thu Jan 1 00:00:00 1970 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=-2.6 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no 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 AEA72C06513 for ; Tue, 2 Jul 2019 08:11:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8626220659 for ; Tue, 2 Jul 2019 08:11:59 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=oracle.com header.i=@oracle.com header.b="npQIMBjD" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728707AbfGBIJi (ORCPT ); Tue, 2 Jul 2019 04:09:38 -0400 Received: from aserp2120.oracle.com ([141.146.126.78]:54014 "EHLO aserp2120.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728697AbfGBIJg (ORCPT ); Tue, 2 Jul 2019 04:09:36 -0400 Received: from pps.filterd (aserp2120.oracle.com [127.0.0.1]) by aserp2120.oracle.com (8.16.0.27/8.16.0.27) with SMTP id x6288irh162788 for ; Tue, 2 Jul 2019 08:09:35 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=subject : from : to : references : message-id : date : mime-version : in-reply-to : content-type : content-transfer-encoding; s=corp-2018-07-02; bh=5POajhMPl0qRevwXf0QmzJmvINtzQ8cr25mR/XkwaEI=; b=npQIMBjDjPGEbNEpl/lEntV6KaJcnaS38ozL+ylzbtSdz6R0zL/JRil285SEBR11y7iu naxqa4i7qwnXMKzTGI7O3SdtCXTKLrQNVYuRmLuKLFXY/e65K5BKPfgwZ42XlolSTEFX Kzk+owtZf+ANpUCX5CZf0IfM6GL9miXtaVpTqFE2ZTBTr0JDt8oX3wE8SQjOmg7ro2Nc dBnZMpb58ZhZzhj+NAg5/pEI1x7wb+4FuIDHBa7EE7UUQoFL6BD6nEgeu6MM36pYPRgi P/i08JL/a+7WMw69OX5284DoSd0e08PxLTtlIhd6xcHo4IpY/QPrgCV6y3Et0r18vUtv nw== Received: from userp3030.oracle.com (userp3030.oracle.com [156.151.31.80]) by aserp2120.oracle.com with ESMTP id 2te5tbhv0y-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK) for ; Tue, 02 Jul 2019 08:09:35 +0000 Received: from pps.filterd (userp3030.oracle.com [127.0.0.1]) by userp3030.oracle.com (8.16.0.27/8.16.0.27) with SMTP id x6287UIe170653 for ; Tue, 2 Jul 2019 08:09:34 GMT Received: from aserv0121.oracle.com (aserv0121.oracle.com [141.146.126.235]) by userp3030.oracle.com with ESMTP id 2tebqgc0pk-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK) for ; Tue, 02 Jul 2019 08:09:34 +0000 Received: from abhmp0017.oracle.com (abhmp0017.oracle.com [141.146.116.23]) by aserv0121.oracle.com (8.14.4/8.13.8) with ESMTP id x6289XWN012529 for ; Tue, 2 Jul 2019 08:09:33 GMT Received: from [10.190.130.61] (/192.188.170.109) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Tue, 02 Jul 2019 01:09:33 -0700 Subject: Re: [PATCH 0/3 RESEND Rebased] readmirror feature From: Anand Jain To: linux-btrfs@vger.kernel.org References: <20190626083402.1895-1-anand.jain@oracle.com> Message-ID: <5fcf9c23-89b5-b167-1f80-a0f4ac107d0b@oracle.com> Date: Tue, 2 Jul 2019 16:09:30 +0800 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:52.0) Gecko/20100101 Thunderbird/52.9.1 MIME-Version: 1.0 In-Reply-To: <20190626083402.1895-1-anand.jain@oracle.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9305 signatures=668688 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=1 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1907020095 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9305 signatures=668688 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 priorityscore=1501 malwarescore=0 suspectscore=1 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1907020095 Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org Ping? On 26/6/19 4:33 PM, Anand Jain wrote: > These patches are tested to be working fine. > > Function call chain __btrfs_map_block()->find_live_mirror() uses > thread pid to determine the %mirror_num when the mirror_num=0. > > This patch introduces a framework so that we can add policies to determine > the %mirror_num. And adds the devid as the readmirror policy. > > The property is stored as an extented attributes of root inode > (BTRFS_FS_TREE_OBJECTID). > User provided devid list is validated against the fs_devices::dev_list. > > For example: > Usage: > btrfs property set readmirror devid[,...] > btrfs property set readmirror "" > > mkfs.btrfs -fq -draid1 -mraid1 /dev/sd[b-d] && mount /dev/sdb /btrfs > btrfs prop set /btrfs readmirror devid1,2 > btrfs prop get /btrfs readmirror > readmirror=devid1,2 > getfattr -n btrfs.readmirror --absolute-names /btrfs > btrfs.readmirror="devid1,2" > btrfs prop set /btrfs readmirror "" > getfattr -n btrfs.readmirror --absolute-names /btrfs > /btrfs: btrfs.readmirror: No such attribute > btrfs prop get /btrfs readmirror > > RFC->v1: > Drops pid as one of the readmirror policy choices and as usual remains > as default. And when the devid is reset the readmirror policy falls back > to pid. > Drops the mount -o readmirror idea, it can be added at a later point of > time. > Property now accepts more than 1 devid as readmirror device. As shown > in the example above. > > Anand Jain (3): > btrfs: add inode pointer to prop_handler::validate() > btrfs: add readmirror property framework > btrfs: add readmirror devid property > > fs/btrfs/props.c | 120 +++++++++++++++++++++++++++++++++++++++++++-- > fs/btrfs/props.h | 4 +- > fs/btrfs/volumes.c | 25 +++++++++- > fs/btrfs/volumes.h | 8 +++ > fs/btrfs/xattr.c | 2 +- > 5 files changed, 150 insertions(+), 9 deletions(-) >