Received: by 2002:a05:6a10:206:0:0:0:0 with SMTP id 6csp1774646pxj; Sat, 12 Jun 2021 21:11:32 -0700 (PDT) X-Google-Smtp-Source: ABdhPJw56g28iBC67+5f8NkF/0Rv+IHF6J+3mK+WosSxGIHvhR62wO2oBHI2t9wiBKDP/tkVSZXX X-Received: by 2002:a17:906:546:: with SMTP id k6mr10026382eja.53.1623557492466; Sat, 12 Jun 2021 21:11:32 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1623557492; cv=none; d=google.com; s=arc-20160816; b=HrrLRIuuIIOOHCKEsW5PdKnVXnLWZ8VuoH9PIrlBNqQILupWY2gnDpiJIjRCfRGdIE pLO/C8sA+9bz2yZCfUvvQPrwwzAEL3zVov/Jxdw8/b1K1ULhV4D+U7NSvpXjg5jioW27 VeXUOUZtvnoRzFq+XdYx9VlsXqZr08xVFpoyHH/4MJPopL3TKFYzUtHrlyBIWJk2fhBB vZPn7UeXzvRG4abqkmYK00D/iHIZDnrodNRWQrZE/Vl878D4fZ45qB4rFq6NOC5qKcrL fKV/Q+MSOES6jAJwWtNucjNprclFQ05iRkRpAUxIm1TYRv0op5es/A4WuV5YqzD4MtD2 Ve/g== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :message-id:cc:subject:to:from:date; bh=lFip1kFsSMYN5axmd4KkvuLIulNRBP+R5aZKcbf6PSM=; b=IYV/BtvifuS25B1ZCLrZF85yleVO7lzBRSPsw4IO9BzBmHd7RkUhsJDNzGLi/c5XDr Th+R4asN5akJy4Fjoax68SWdi3bO9mLp0fUTMq7lFxLNITTlKLiODfIjr2Jwm+DLi4NP 7l8IZWHxA/98MZibCQsbewbdXdpUm3PO0gDvp8/yWWQ1v8JkGei77y3Rz6S5rZzptTOm p4PMvJ5Sm7BGsNuhRpgdhc17+12HU4M3O/fikqtBcRCkt3iJhrnhcelEg5KddznQrdhF UGHTrxvSV1NqTyhtMspogZSvl/aul7B5xEo8lv3R/0djU6gCcm/xU910QUnmQ8/YzSuv 9lLw== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-nfs-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-nfs-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id u7si306468eju.463.2021.06.12.21.10.50; Sat, 12 Jun 2021 21:11:32 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-nfs-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-nfs-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-nfs-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231575AbhFMDzO (ORCPT + 99 others); Sat, 12 Jun 2021 23:55:14 -0400 Received: from out20-98.mail.aliyun.com ([115.124.20.98]:44051 "EHLO out20-98.mail.aliyun.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231537AbhFMDzO (ORCPT ); Sat, 12 Jun 2021 23:55:14 -0400 X-Alimail-AntiSpam: AC=CONTINUE;BC=0.2167115|-1;CH=green;DM=|CONTINUE|false|;DS=CONTINUE|ham_news_journal|0.00157549-0.00027822-0.998146;FP=0|0|0|0|0|-1|-1|-1;HT=ay29a033018047209;MF=wangyugui@e16-tech.com;NM=1;PH=DS;RN=2;RT=2;SR=0;TI=SMTPD_---.KRcIApQ_1623556391; Received: from 192.168.2.112(mailfrom:wangyugui@e16-tech.com fp:SMTPD_---.KRcIApQ_1623556391) by smtp.aliyun-inc.com(10.147.41.231); Sun, 13 Jun 2021 11:53:11 +0800 Date: Sun, 13 Jun 2021 11:53:14 +0800 From: Wang Yugui To: linux-nfs@vger.kernel.org Subject: any idea about auto export multiple btrfs snapshots? Cc: neilb@suse.de Message-Id: <20210613115313.BC59.409509F4@e16-tech.com> MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit X-Mailer: Becky! ver. 2.75.04 [en] Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org Hi, Any idea about auto export multiple btrfs snapshots? One related patch is yet not merged to nfs-utils 2.5.3. From: "NeilBrown" Subject: [PATCH/RFC v2 nfs-utils] Fix NFSv4 export of tmpfs filesystems. In this patch, an UUID is auto generated when a tmpfs have no UUID. for btrfs, multiple subvolume snapshot have the same filesystem UUID. Could we generate an UUID for btrfs subvol with 'filesystem UUID' + 'subvol ID'? Best Regards Wang Yugui (wangyugui@e16-tech.com) 2021/06/13