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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id F0729EB64D9 for ; Tue, 4 Jul 2023 14:06:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230479AbjGDOGb (ORCPT ); Tue, 4 Jul 2023 10:06:31 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37116 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230197AbjGDOGb (ORCPT ); Tue, 4 Jul 2023 10:06:31 -0400 Received: from mail-pl1-f169.google.com (mail-pl1-f169.google.com [209.85.214.169]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6CB9BF7; Tue, 4 Jul 2023 07:06:30 -0700 (PDT) Received: by mail-pl1-f169.google.com with SMTP id d9443c01a7336-1b8303cd32aso44543055ad.2; Tue, 04 Jul 2023 07:06:30 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1688479590; x=1691071590; h=content-transfer-encoding:in-reply-to:from:references:cc:to :content-language:subject:user-agent:mime-version:date:message-id :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=JV2SCOEdB9t0w6tigDexjJMYhGF54ZwsLlYmJ1gE7wU=; b=bMICWCFC1W076H+YN1lR/nCQau0HbgCI0H4vl8vZYXgociPXrYyV5p2vJwJSn4IvXw X0VdLEzWRujDjUle97qp5ejyEiOTvK9cEwtJF9fXchWUeZ3V4uQSdYUun19YJ76vkPzg EZ1VW7i4f34rBtELVeYa/NvSt/WWf8EGkE3xgRc0FNndIJufTeQZZj1KiqF78g6Qv4BO 0X8PwY5ee/rPn2rjRArQ76JDuSpgQ/4XYckAc/yuSHkTasvw/OegnkRz43f6yLq3W0e3 rRA6atJmAtXopQDEq1HSeWbL6ASsixUt+la82hfgmJxFH2y2NJEwaZhVIkeu3mm+1ick EadQ== X-Gm-Message-State: ABy/qLaMBNDn1rNBaXGQB2u/UKIklMPTeUzdebm00ZhMy9QxeJpBvQHH tDxcOHS51TLWDp/ELdGfDOY= X-Google-Smtp-Source: APBJJlEESj5502hCCjnCrW5aNdhMviGxH5NXIz8SFwBF+614aVB6e0+1hJtWMTw8TJzZNuQy8olTNg== X-Received: by 2002:a17:903:447:b0:1b8:a31b:ac85 with SMTP id iw7-20020a170903044700b001b8a31bac85mr2719760plb.41.1688479589749; Tue, 04 Jul 2023 07:06:29 -0700 (PDT) Received: from [192.168.50.14] ([98.51.102.78]) by smtp.gmail.com with ESMTPSA id jk4-20020a170903330400b001b672af624esm13083569plb.164.2023.07.04.07.06.26 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 04 Jul 2023 07:06:29 -0700 (PDT) Message-ID: Date: Tue, 4 Jul 2023 07:06:26 -0700 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.11.0 Subject: Re: [PATCH 01/32] block: Provide blkdev_get_handle_* functions Content-Language: en-US To: Jan Kara , linux-block@vger.kernel.org Cc: linux-fsdevel@vger.kernel.org, Jens Axboe , Christoph Hellwig , Alasdair Kergon , Andrew Morton , Anna Schumaker , Chao Yu , Christian Borntraeger , "Darrick J. Wong" , Dave Kleikamp , David Sterba , dm-devel@redhat.com, drbd-dev@lists.linbit.com, Gao Xiang , Jack Wang , Jaegeuk Kim , jfs-discussion@lists.sourceforge.net, Joern Engel , Joseph Qi , Kent Overstreet , linux-bcache@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-erofs@lists.ozlabs.org, linux-ext4@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-mm@kvack.org, linux-mtd@lists.infradead.org, linux-nfs@vger.kernel.org, linux-nilfs@vger.kernel.org, linux-nvme@lists.infradead.org, linux-pm@vger.kernel.org, linux-raid@vger.kernel.org, linux-s390@vger.kernel.org, linux-scsi@vger.kernel.org, linux-xfs@vger.kernel.org, "Md. Haris Iqbal" , Mike Snitzer , Minchan Kim , ocfs2-devel@oss.oracle.com, reiserfs-devel@vger.kernel.org, Sergey Senozhatsky , Song Liu , Sven Schnelle , target-devel@vger.kernel.org, Ted Tso , Trond Myklebust , xen-devel@lists.xenproject.org References: <20230629165206.383-1-jack@suse.cz> <20230704122224.16257-1-jack@suse.cz> From: Bart Van Assche In-Reply-To: <20230704122224.16257-1-jack@suse.cz> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-bcache@vger.kernel.org On 7/4/23 05:21, Jan Kara wrote: > +struct bdev_handle { > + struct block_device *bdev; > + void *holder; > +}; Please explain in the patch description why a holder pointer is introduced in struct bdev_handle and how it relates to the bd_holder pointer in struct block_device. Is one of the purposes of this patch series perhaps to add support for multiple holders per block device? Thanks, Bart.