From owner-freebsd-fs@freebsd.org Sun Jan 26 12:56:52 2020 Return-Path: Delivered-To: freebsd-fs@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 67E9D23D3D9 for ; Sun, 26 Jan 2020 12:56:52 +0000 (UTC) (envelope-from wjw@digiware.nl) Received: from smtp.digiware.nl (smtp.digiware.nl [176.74.240.9]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) server-signature RSA-PSS (4096 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 485CZC4Cz8z40lh for ; Sun, 26 Jan 2020 12:56:51 +0000 (UTC) (envelope-from wjw@digiware.nl) Received: from router.digiware.nl (localhost.digiware.nl [127.0.0.1]) by smtp.digiware.nl (Postfix) with ESMTP id 1F1831D3D6; Sun, 26 Jan 2020 13:56:49 +0100 (CET) X-Virus-Scanned: amavisd-new at digiware.com Received: from smtp.digiware.nl ([127.0.0.1]) by router.digiware.nl (router.digiware.nl [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 2KFY8KoN2aI0; Sun, 26 Jan 2020 13:56:48 +0100 (CET) Received: from [192.168.10.9] (vaio [192.168.10.9]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.digiware.nl (Postfix) with ESMTPSA id 7BF2C1D3D5; Sun, 26 Jan 2020 13:56:48 +0100 (CET) Subject: Re: export a zfs snapshot over nfs To: mike tancsa , freebsd-fs References: <62fc92d6-7a31-9dac-d237-082cc71d0dd9@sentex.net> From: Willem Jan Withagen Message-ID: Date: Sun, 26 Jan 2020 13:56:48 +0100 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:60.0) Gecko/20100101 Thunderbird/60.9.1 MIME-Version: 1.0 In-Reply-To: <62fc92d6-7a31-9dac-d237-082cc71d0dd9@sentex.net> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit Content-Language: nl X-Rspamd-Queue-Id: 485CZC4Cz8z40lh X-Spamd-Bar: ----- Authentication-Results: mx1.freebsd.org; dkim=none; dmarc=none; spf=pass (mx1.freebsd.org: domain of wjw@digiware.nl designates 176.74.240.9 as permitted sender) smtp.mailfrom=wjw@digiware.nl X-Spamd-Result: default: False [-5.63 / 15.00]; ARC_NA(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; NEURAL_HAM_MEDIUM(-1.00)[-1.000,0]; FROM_HAS_DN(0.00)[]; R_SPF_ALLOW(-0.20)[+mx]; NEURAL_HAM_LONG(-1.00)[-1.000,0]; MIME_GOOD(-0.10)[text/plain]; RCVD_TLS_LAST(0.00)[]; DMARC_NA(0.00)[digiware.nl]; RCVD_COUNT_THREE(0.00)[4]; TO_MATCH_ENVRCPT_SOME(0.00)[]; TO_DN_ALL(0.00)[]; RCVD_IN_DNSWL_MED(-0.20)[9.240.74.176.list.dnswl.org : 127.0.9.2]; RCPT_COUNT_TWO(0.00)[2]; IP_SCORE(-3.13)[ip: (-9.76), ipnet: 176.74.224.0/19(-4.88), asn: 28878(-1.05), country: NL(0.03)]; FROM_EQ_ENVFROM(0.00)[]; R_DKIM_NA(0.00)[]; MIME_TRACE(0.00)[0:+]; ASN(0.00)[asn:28878, ipnet:176.74.224.0/19, country:NL]; MID_RHS_MATCH_FROM(0.00)[] X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 26 Jan 2020 12:56:52 -0000 On 24-1-2020 16:33, mike tancsa wrote: > On a backup server, I want to export a zfs snapshot via nfs, but I cant > seem to do it. > > given the snapshot is > backup2/zrepl/sink2/nfserver1/images/vms@zrepl_20190902_122114_000 > > I can do something locally like > > mkdir /tmpmount > > add > > /tmpmount       -maproot=nobody   192.168.13.36 > > and from the client machine mount /tmpmount. > > But if I do on the server > > mount -t zfs > backup2/zrepl/sink2/nfserver1/images/vms@zrepl_20190902_122114_000 /tmpmount > > and then try and mount from the client, I get a permission denied. > > I can work around it by creating a quick clone of the snapshot and > mounting the clone.  But was curious as to why I cant do it the first way ? The fact that it works for a clone, but not for a snapshot with 'permission denied' gives me the feeling that one way or another something is trying to modify the snapshot, which is not allowed. Could perhaps be things like  atime of mtime. And on a snapshot you are not allowed to do so. Not sure if nfs-mounting  /tmpmount '-ro' will help? --WjW From owner-freebsd-fs@freebsd.org Sun Jan 26 15:54:01 2020 Return-Path: Delivered-To: freebsd-fs@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 5E0541F1DE9 for ; Sun, 26 Jan 2020 15:54:01 +0000 (UTC) (envelope-from agapon@gmail.com) Received: from mail-lj1-f173.google.com (mail-lj1-f173.google.com [209.85.208.173]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) server-signature RSA-PSS (4096 bits) client-signature RSA-PSS (2048 bits) client-digest SHA256) (Client CN "smtp.gmail.com", Issuer "GTS CA 1O1" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 485HVc48Vqz49DK for ; Sun, 26 Jan 2020 15:54:00 +0000 (UTC) (envelope-from agapon@gmail.com) Received: by mail-lj1-f173.google.com with SMTP id j26so7961705ljc.12 for ; Sun, 26 Jan 2020 07:54:00 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:references:from:openpgp:autocrypt :message-id:date:user-agent:mime-version:in-reply-to :content-language:content-transfer-encoding; bh=GeFA0tdiyWtKDhM8LrcXuPaZcQ/2k15DGesxfoGanTg=; b=U9cxlKykpHXoSRCqzB0yhiqQtErmKXEPHhEmMaswjSaQNHMQKnpVx9bJNk65jd81Zj gRa62Vhkb87faJpa0hvn6gmPkygjpojir4nNkcRlk9KjWS7zUsMGg4wcA5IXefyhFoMD BIj1Ve7JT/ftfLYVGstnBOGHpsqoTV9bK/qaDR/9tVCIeif9QLXrwdmJkwAWX7JMeU8s deopgQU3leJY4WCu0KFJUwfDearFzBaecH/fzXCfVestCOE9q4vOqYMh/N+sba+iZL7I NCZGHjP4iMDJIDjyneosCMj1zt+rGQiBKzWMmPXchcfBStM6Orc6tGF0ENV7rztCDS19 10tQ== X-Gm-Message-State: APjAAAWH3D/qfqQYuIWkX4JThFx/xUqCW6hmNygCeOv79ZHzy8PhGXd/ XuDwtWObpYtGo6pcfc5eG5ogS+n3 X-Google-Smtp-Source: APXvYqxa6EnZxGHCKzzNckPIJ95M9bak1GFFvQpwMODhWzyxzFI8xvUPhyoKhLxq0FOhxzIJOj1QFw== X-Received: by 2002:a2e:9b05:: with SMTP id u5mr7883851lji.59.1580054038436; Sun, 26 Jan 2020 07:53:58 -0800 (PST) Received: from [192.168.0.88] (east.meadow.volia.net. [93.72.151.96]) by smtp.googlemail.com with ESMTPSA id h7sm6596264lfj.29.2020.01.26.07.53.57 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sun, 26 Jan 2020 07:53:57 -0800 (PST) Subject: Re: export a zfs snapshot over nfs To: mike tancsa , freebsd-fs References: <62fc92d6-7a31-9dac-d237-082cc71d0dd9@sentex.net> From: Andriy Gapon Openpgp: preference=signencrypt Autocrypt: addr=avg@FreeBSD.org; prefer-encrypt=mutual; keydata= mQINBFm4LIgBEADNB/3lT7f15UKeQ52xCFQx/GqHkSxEdVyLFZTmY3KyNPQGBtyvVyBfprJ7 mAeXZWfhat6cKNRAGZcL5EmewdQuUfQfBdYmKjbw3a9GFDsDNuhDA2QwFt8BmkiVMRYyvI7l N0eVzszWCUgdc3qqM6qqcgBaqsVmJluwpvwp4ZBXmch5BgDDDb1MPO8AZ2QZfIQmplkj8Y6Z AiNMknkmgaekIINSJX8IzRzKD5WwMsin70psE8dpL/iBsA2cpJGzWMObVTtCxeDKlBCNqM1i gTXta1ukdUT7JgLEFZk9ceYQQMJJtUwzWu1UHfZn0Fs29HTqawfWPSZVbulbrnu5q55R4PlQ /xURkWQUTyDpqUvb4JK371zhepXiXDwrrpnyyZABm3SFLkk2bHlheeKU6Yql4pcmSVym1AS4 dV8y0oHAfdlSCF6tpOPf2+K9nW1CFA8b/tw4oJBTtfZ1kxXOMdyZU5fiG7xb1qDgpQKgHUX8 7Rd2T1UVLVeuhYlXNw2F+a2ucY+cMoqz3LtpksUiBppJhw099gEXehcN2JbUZ2TueJdt1FdS ztnZmsHUXLxrRBtGwqnFL7GSd6snpGIKuuL305iaOGODbb9c7ne1JqBbkw1wh8ci6vvwGlzx rexzimRaBzJxlkjNfMx8WpCvYebGMydNoeEtkWldtjTNVsUAtQARAQABtB5BbmRyaXkgR2Fw b24gPGF2Z0BGcmVlQlNELm9yZz6JAlQEEwEIAD4WIQS+LEO7ngQnXA4Bjr538m7TUc1yjwUC WbgsiAIbIwUJBaOagAULCQgHAgYVCAkKCwIEFgIDAQIeAQIXgAAKCRB38m7TUc1yj+JAEACV l9AK/nOWAt/9cufV2fRj0hdOqB1aCshtSrwHk/exXsDa4/FkmegxXQGY+3GWX3deIyesbVRL rYdtdK0dqJyT1SBqXK1h3/at9rxr9GQA6KWOxTjUFURsU7ok/6SIlm8uLRPNKO+yq0GDjgaO LzN+xykuBA0FlhQAXJnpZLcVfPJdWv7sSHGedL5ln8P8rxR+XnmsA5TUaaPcbhTB+mG+iKFj GghASDSfGqLWFPBlX/fpXikBDZ1gvOr8nyMY9nXhgfXpq3B6QCRYKPy58ChrZ5weeJZ29b7/ QdEO8NFNWHjSD9meiLdWQaqo9Y7uUxN3wySc/YUZxtS0bhAd8zJdNPsJYG8sXgKjeBQMVGuT eCAJFEYJqbwWvIXMfVWop4+O4xB+z2YE3jAbG/9tB/GSnQdVSj3G8MS80iLS58frnt+RSEw/ psahrfh0dh6SFHttE049xYiC+cM8J27Aaf0i9RflyITq57NuJm+AHJoU9SQUkIF0nc6lfA+o JRiyRlHZHKoRQkIg4aiKaZSWjQYRl5Txl0IZUP1dSWMX4s3XTMurC/pnja45dge/4ESOtJ9R 8XuIWg45Oq6MeIWdjKddGhRj3OohsltKgkEU3eLKYtB6qRTQypHHUawCXz88uYt5e3w4V16H lCpSTZV/EVHnNe45FVBlvK7k7HFfDDkryLkCDQRZuCyIARAAlq0slcsVboY/+IUJdcbEiJRW be9HKVz4SUchq0z9MZPX/0dcnvz/gkyYA+OuM78dNS7Mbby5dTvOqfpLJfCuhaNYOhlE0wY+ 1T6Tf1f4c/uA3U/YiadukQ3+6TJuYGAdRZD5EqYFIkreARTVWg87N9g0fT9BEqLw9lJtEGDY EWUE7L++B8o4uu3LQFEYxcrb4K/WKmgtmFcm77s0IKDrfcX4doV92QTIpLiRxcOmCC/OCYuO jB1oaaqXQzZrCutXRK0L5XN1Y1PYjIrEzHMIXmCDlLYnpFkK+itlXwlE2ZQxkfMruCWdQXye syl2fynAe8hvp7Mms9qU2r2K9EcJiR5N1t1C2/kTKNUhcRv7Yd/vwusK7BqJbhlng5ZgRx0m WxdntU/JLEntz3QBsBsWM9Y9wf2V4tLv6/DuDBta781RsCB/UrU2zNuOEkSixlUiHxw1dccI 6CVlaWkkJBxmHX22GdDFrcjvwMNIbbyfQLuBq6IOh8nvu9vuItup7qemDG3Ms6TVwA7BD3j+ 3fGprtyW8Fd/RR2bW2+LWkMrqHffAr6Y6V3h5kd2G9Q8ZWpEJk+LG6Mk3fhZhmCnHhDu6CwN MeUvxXDVO+fqc3JjFm5OxhmfVeJKrbCEUJyM8ESWLoNHLqjywdZga4Q7P12g8DUQ1mRxYg/L HgZY3zfKOqcAEQEAAYkCPAQYAQgAJhYhBL4sQ7ueBCdcDgGOvnfybtNRzXKPBQJZuCyIAhsM BQkFo5qAAAoJEHfybtNRzXKPBVwQAKfFy9P7N3OsLDMB56A4Kf+ZT+d5cIx0Yiaf4n6w7m3i ImHHHk9FIetI4Xe54a2IXh4Bq5UkAGY0667eIs+Z1Ea6I2i27Sdo7DxGwq09Qnm/Y65ADvXs 3aBvokCcm7FsM1wky395m8xUos1681oV5oxgqeRI8/76qy0hD9WR65UW+HQgZRIcIjSel9vR XDaD2HLGPTTGr7u4v00UeTMs6qvPsa2PJagogrKY8RXdFtXvweQFz78NbXhluwix2Tb9ETPk LIpDrtzV73CaE2aqBG/KrboXT2C67BgFtnk7T7Y7iKq4/XvEdDWscz2wws91BOXuMMd4c/c4 OmGW9m3RBLufFrOag1q5yUS9QbFfyqL6dftJP3Zq/xe+mr7sbWbhPVCQFrH3r26mpmy841ym dwQnNcsbIGiBASBSKksOvIDYKa2Wy8htPmWFTEOPRpFXdGQ27awcjjnB42nngyCK5ukZDHi6 w0qK5DNQQCkiweevCIC6wc3p67jl1EMFY5+z+zdTPb3h7LeVnGqW0qBQl99vVFgzLxchKcl0 R/paSFgwqXCZhAKMuUHncJuynDOP7z5LirUeFI8qsBAJi1rXpQoLJTVcW72swZ42IdPiboqx NbTMiNOiE36GqMcTPfKylCbF45JNX4nF9ElM0E+Y8gi4cizJYBRr2FBJgay0b9Cp Message-ID: Date: Sun, 26 Jan 2020 17:53:56 +0200 User-Agent: Mozilla/5.0 (X11; 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TO_MATCH_ENVRCPT_SOME(0.00)[]; IP_SCORE(-1.07)[ip: (-0.44), ipnet: 209.85.128.0/17(-3.06), asn: 15169(-1.79), country: US(-0.05)]; FORGED_SENDER(0.30)[avg@FreeBSD.org,agapon@gmail.com]; RWL_MAILSPIKE_POSSIBLE(0.00)[173.208.85.209.rep.mailspike.net : 127.0.0.17]; R_DKIM_NA(0.00)[]; FREEMAIL_ENVFROM(0.00)[gmail.com]; ASN(0.00)[asn:15169, ipnet:209.85.128.0/17, country:US]; FROM_NEQ_ENVFROM(0.00)[avg@FreeBSD.org,agapon@gmail.com]; MID_RHS_MATCH_FROM(0.00)[]; RECEIVED_SPAMHAUS_PBL(0.00)[96.151.72.93.khpj7ygk5idzvmvt5x4ziurxhy.zen.dq.spamhaus.net : 127.0.0.10] X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 26 Jan 2020 15:54:01 -0000 On 24/01/2020 17:33, mike tancsa wrote: > On a backup server, I want to export a zfs snapshot via nfs, but I cant > seem to do it. > > given the snapshot is > backup2/zrepl/sink2/nfserver1/images/vms@zrepl_20190902_122114_000 > > I can do something locally like > > mkdir /tmpmount > > add > > /tmpmount       -maproot=nobody   192.168.13.36 > > and from the client machine mount /tmpmount. > > But if I do on the server > > mount -t zfs > backup2/zrepl/sink2/nfserver1/images/vms@zrepl_20190902_122114_000 /tmpmount > > and then try and mount from the client, I get a permission denied. > > I can work around it by creating a quick clone of the snapshot and > mounting the clone.  But was curious as to why I cant do it the first way ? > > server is releng12 and nfsv3 Have you tried to navigate to the snapshot from the filesystem mount via .zfs/snapshot ? -- Andriy Gapon From owner-freebsd-fs@freebsd.org Tue Jan 28 14:07:43 2020 Return-Path: Delivered-To: freebsd-fs@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id AE9AD22E27A for ; Tue, 28 Jan 2020 14:07:43 +0000 (UTC) (envelope-from mike@sentex.net) Received: from pyroxene2a.sentex.ca (pyroxene19.sentex.ca [IPv6:2607:f3e0:0:3::19]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) server-signature RSA-PSS (4096 bits) client-signature RSA-PSS (2048 bits) client-digest SHA256) (Client CN "pyroxene.sentex.ca", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 486T323RPJz40s4; Tue, 28 Jan 2020 14:07:42 +0000 (UTC) (envelope-from mike@sentex.net) Received: from [IPv6:2607:f3e0:0:4:4d3b:d152:8d6a:eb10] ([IPv6:2607:f3e0:0:4:4d3b:d152:8d6a:eb10]) by pyroxene2a.sentex.ca (8.15.2/8.15.2) with ESMTPS id 00SE7ftF069695 (version=TLSv1.3 cipher=TLS_AES_128_GCM_SHA256 bits=128 verify=NO); Tue, 28 Jan 2020 09:07:41 -0500 (EST) (envelope-from mike@sentex.net) Subject: Re: export a zfs snapshot over nfs To: Andriy Gapon , freebsd-fs References: <62fc92d6-7a31-9dac-d237-082cc71d0dd9@sentex.net> From: mike tancsa Autocrypt: addr=mike@sentex.net; 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WOW64; rv:68.0) Gecko/20100101 Thunderbird/68.4.1 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit Content-Language: en-US X-Rspamd-Queue-Id: 486T323RPJz40s4 X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org; dkim=none; dmarc=none; spf=pass (mx1.freebsd.org: domain of mike@sentex.net designates 2607:f3e0:0:3::19 as permitted sender) smtp.mailfrom=mike@sentex.net X-Spamd-Result: default: False [-2.71 / 15.00]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-1.00)[-0.998,0]; FROM_HAS_DN(0.00)[]; R_SPF_ALLOW(-0.20)[+ptr]; TO_MATCH_ENVRCPT_ALL(0.00)[]; MIME_GOOD(-0.10)[text/plain]; HFILTER_HELO_IP_A(1.00)[pyroxene2a.sentex.ca]; DMARC_NA(0.00)[sentex.net]; HFILTER_HELO_NORES_A_OR_MX(0.30)[pyroxene2a.sentex.ca]; NEURAL_HAM_LONG(-1.00)[-0.998,0]; IP_SCORE(-1.71)[ipnet: 2607:f3e0::/32(-4.93), asn: 11647(-3.54), country: CA(-0.09)]; TO_DN_ALL(0.00)[]; RCPT_COUNT_TWO(0.00)[2]; FROM_EQ_ENVFROM(0.00)[]; R_DKIM_NA(0.00)[]; MIME_TRACE(0.00)[0:+]; ASN(0.00)[asn:11647, ipnet:2607:f3e0::/32, country:CA]; MID_RHS_MATCH_FROM(0.00)[]; RCVD_TLS_ALL(0.00)[]; RCVD_COUNT_TWO(0.00)[2] X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 28 Jan 2020 14:07:43 -0000 On 1/26/2020 10:53 AM, Andriy Gapon wrote: > On 24/01/2020 17:33, mike tancsa wrote: >> On a backup server, I want to export a zfs snapshot via nfs, but I cant >> seem to do it. >> >> given the snapshot is >> backup2/zrepl/sink2/nfserver1/images/vms@zrepl_20190902_122114_000 >> >> I can do something locally like >> >> mkdir /tmpmount >> >> add >> >> /tmpmount       -maproot=nobody   192.168.13.36 >> >> and from the client machine mount /tmpmount. >> >> But if I do on the server >> >> mount -t zfs >> backup2/zrepl/sink2/nfserver1/images/vms@zrepl_20190902_122114_000 /tmpmount >> >> and then try and mount from the client, I get a permission denied. >> >> I can work around it by creating a quick clone of the snapshot and >> mounting the clone.  But was curious as to why I cant do it the first way ? >> >> server is releng12 and nfsv3 > Have you tried to navigate to the snapshot from the filesystem mount via > .zfs/snapshot ? > Thanks to everyone who replied. I can indeed mount the snapshot on nfsv4 by going directly to it So if I have something like slowtank/tmp and a snapshot called slowtank/tmp@clean2019-server mount -t nfs 192.168.242.1:/slowtank/tmp/.zfs/snapshot/clean2019-server /mnt I can indeed do this on nfsv4 On nfsv3, I have to have on the exports line keep it to , /slowtank/tmp/.zfs/snapshot having /slowtank/tmp/.zfs/snapshot/clean2019-server gives a "bad exports line" when I restart mountd. But other than that, it works. When I have time, I will move the main server in question to nfsv4 as it seems more flexible.  But for now, between clones, direct snapshot mounts etc, I am able to get done what I need to.     ---Mike