From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ie0-f171.google.com ([209.85.223.171]:35459 "EHLO mail-ie0-f171.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932280AbbDVNyM (ORCPT ); Wed, 22 Apr 2015 09:54:12 -0400 Received: by iejt8 with SMTP id t8so37606067iej.2 for ; Wed, 22 Apr 2015 06:54:11 -0700 (PDT) Message-ID: <5537A7F6.9040003@gmail.com> Date: Wed, 22 Apr 2015 09:53:58 -0400 From: Austin S Hemmelgarn MIME-Version: 1.0 To: sri , linux-btrfs@vger.kernel.org Subject: Re: btrfs snapshot root level and for subvolumes References: In-Reply-To: Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha1; boundary="------------ms020306010004040609020307" Sender: linux-btrfs-owner@vger.kernel.org List-ID: This is a cryptographically signed message in MIME format. --------------ms020306010004040609020307 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: quoted-printable On 2015-04-22 07:19, sri wrote: > Hi, > I btrfs file system created with one device /dev/sdb and mounted under > /btrfs1. > > created one file /btrfs1/errno.h, one directory /btrfs1/dir1 and > 2 subvolumes /btrfs1/subvol1 and /btrfs/subvol2 > > create directories and files under subvolume /btrfs1/subvol1. > Nothing inside /btrfs1/subvol2. > > Below is tree representation of the file system. > > #cd /btrfs1 > #tree /btrfs1 > - errno.h > -dir1 > - file1 > - file2 > -subvol1 > -dir1 > -file1 > -file2 > > -subvol2 > > > at root level of /btrfs1, i have one file errno.h, dir1, and 2 > subvolumes subvol1, subvol2. > > When I create snapshot for subvol1 (say snap_subvol1), I can able to se= e > all files and directories of subvol1 are showed in /btrfs1/snap_subvol1= > > But when I create snapshot at btrfs1 level by using below command > "btrfs subvolume snapshot /btrfs1 /btrfs1/root_snap" > > and see contents of /btrfs1/root_snap, I can able to see all root level= > files and directories but cannot find any files and directories inside > subvol1. > > My question is can't we take btrfs root level snapshot and get snapshot= > of everything under root file system ?? > Is btrfs subvolume snapshot is only to take subvolume snapshot? > > If it so, is there a way to take snapshot at root level? (in this case > /btrfs1) > > I am just confused how subvolume snapshot work in this case. Because of how subvolumes work on btrfs, snapshots currently stop at=20 subvolume boundaries. This is an intended behavior to people from=20 shooting themselves in the foot with recursive snapshots stored in the=20 subvolume that is being snapshotted. As far as I know, there is=20 currently no way to do recursive snapshotting of subvolumes without=20 using some form of scripting. --------------ms020306010004040609020307 Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: S/MIME Cryptographic Signature MIAGCSqGSIb3DQEHAqCAMIACAQExCzAJBgUrDgMCGgUAMIAGCSqGSIb3DQEHAQAAoIIGuDCC BrQwggScoAMCAQICAxBuVTANBgkqhkiG9w0BAQ0FADB5MRAwDgYDVQQKEwdSb290IENBMR4w HAYDVQQLExVodHRwOi8vd3d3LmNhY2VydC5vcmcxIjAgBgNVBAMTGUNBIENlcnQgU2lnbmlu ZyBBdXRob3JpdHkxITAfBgkqhkiG9w0BCQEWEnN1cHBvcnRAY2FjZXJ0Lm9yZzAeFw0xNTAz MjUxOTM0MzhaFw0xNTA5MjExOTM0MzhaMGMxGDAWBgNVBAMTD0NBY2VydCBXb1QgVXNlcjEj MCEGCSqGSIb3DQEJARYUYWhmZXJyb2luN0BnbWFpbC5jb20xIjAgBgkqhkiG9w0BCQEWE2Fo ZW1tZWxnQG9oaW9ndC5jb20wggIiMA0GCSqGSIb3DQEBAQUAA4ICDwAwggIKAoICAQCdD/zW 2rRAFCLnDfXpWxU1+ODqRVUgzHvrRO7ADUxRo1CBDc3JSX5TIW2OGmQ3DAKGOACp8Z0sgxMc B05tzAZ/M7m4jajVrwwdVCdrwVGxTdAai7Kwg4ZCVfyMVhcwo8R2eW3QahBx34G0RKumK9sZ ZQSQ+zULAzpY6uz7T1sAk/erMoivRXF6u8WvOsLkOD1F/Xyv1ZccSUG5YeDgZgc0nZUBvyIp zXSHjgWerFkrxEM3y2z/Ff3eL1sgGYecV/I1F+I5S01V7Kclt/qRW10c/4JEGRcI1FmrJBPu BtMYPbg/3Y9LZROYN+mVIFxZxOfrmjfFZ96xt/TaMXo8vcEKtWcNEjhGBjEbfMUEm4aq8ygQ 4MuEcpJc8DJCHBkg2KBk13DkbU2qNepTD6Uip1C+g+KMr0nd6KOJqSH27ZuNY4xqV4hIxFHp ex0zY7mq6fV2o6sKBGQzRdI20FDYmNjsLJwjH6qJ8laxFphZnPRpBThmu0AjuBWE72GnI1oA aO+bs92MQGJernt7hByCnDO82W/ykbVz+Ge3Sax8NY0m2Xdvp6WFDY/PjD9CdaJ9nwQGsUSa N54lrZ2qMTeCI9Vauwf6U69BA42xgk65VvxvTNqji+tZ4aZbarZ7el2/QDHOb/rRwlCFplS/ z4l1f1nOrE6bnDl5RBJyW3zi74P6GwIDAQABo4IBWTCCAVUwDAYDVR0TAQH/BAIwADBWBglg hkgBhvhCAQ0ESRZHVG8gZ2V0IHlvdXIgb3duIGNlcnRpZmljYXRlIGZvciBGUkVFIGhlYWQg b3ZlciB0byBodHRwOi8vd3d3LkNBY2VydC5vcmcwDgYDVR0PAQH/BAQDAgOoMEAGA1UdJQQ5 MDcGCCsGAQUFBwMEBggrBgEFBQcDAgYKKwYBBAGCNwoDBAYKKwYBBAGCNwoDAwYJYIZIAYb4 QgQBMDIGCCsGAQUFBwEBBCYwJDAiBggrBgEFBQcwAYYWaHR0cDovL29jc3AuY2FjZXJ0Lm9y ZzAxBgNVHR8EKjAoMCagJKAihiBodHRwOi8vY3JsLmNhY2VydC5vcmcvcmV2b2tlLmNybDA0 BgNVHREELTArgRRhaGZlcnJvaW43QGdtYWlsLmNvbYETYWhlbW1lbGdAb2hpb2d0LmNvbTAN BgkqhkiG9w0BAQ0FAAOCAgEAGvl7xb42JMRH5D/vCIDYvFY3dR2FPd5kmOqpKU/fvQ8ovmJa p5N/FDrsCL+YdslxPY+AAn78PYmL5pFHTdRadT++07DPIMtQyy2qd+XRmz6zP8Il7vGcEDmO WmMLYMq4xV9s/N7t7JJp6ftdIYUcoTVChUgilDaRWMLidtslCdRsBVfUjPb1bF5Ua31diKDP e0M9/e2CU36rbcTtiNCXhptMigzuL3zJXUf2B9jyUV8pnqNEQH36fqJ7YTBLcpq3aYa2XbAH Hgx9GehJBIqwspDmhPCFZ/QmqUXCkt+XfvinQ2NzKR6P3+OdYbwqzVX8BdMeojh7Ig8x/nIx mQ+/ufstL1ZYp0bg13fyK/hPYSIBpayaC76vzWovkIm70DIDRIFLi20p/qTd7rfDYy831Hjm +lDdCECF9bIXEWFk33kA97dgQIMbf5chEmlFg8S0e4iw7LMjvRqMX3eCD8GJ2+oqyZUwzZxy S0Mx+rBld5rrN7LsXwZ671HsGqNeYbYeU25e7t7/Gcc6Bd/kPfA+adEuUGFcvUKH3trDYqNq 6mOkAd8WO/mQadlc3ztS++XDMhmIpfBre9MPAr6usqf+wc+R8Nk9KLK39kEgrqVfzc/fgf8L MaD4rHnusdg4gca6Yi+kNrm99anw7SwaBrBvULYBp7ixNRUhaYiNW4YjTrYxggShMIIEnQIB ATCBgDB5MRAwDgYDVQQKEwdSb290IENBMR4wHAYDVQQLExVodHRwOi8vd3d3LmNhY2VydC5v cmcxIjAgBgNVBAMTGUNBIENlcnQgU2lnbmluZyBBdXRob3JpdHkxITAfBgkqhkiG9w0BCQEW EnN1cHBvcnRAY2FjZXJ0Lm9yZwIDEG5VMAkGBSsOAwIaBQCgggH1MBgGCSqGSIb3DQEJAzEL BgkqhkiG9w0BBwEwHAYJKoZIhvcNAQkFMQ8XDTE1MDQyMjEzNTM1OFowIwYJKoZIhvcNAQkE MRYEFPc5ITZsEsL6JiX2bBx3T/ttUUBrMGwGCSqGSIb3DQEJDzFfMF0wCwYJYIZIAWUDBAEq MAsGCWCGSAFlAwQBAjAKBggqhkiG9w0DBzAOBggqhkiG9w0DAgICAIAwDQYIKoZIhvcNAwIC AUAwBwYFKw4DAgcwDQYIKoZIhvcNAwICASgwgZEGCSsGAQQBgjcQBDGBgzCBgDB5MRAwDgYD VQQKEwdSb290IENBMR4wHAYDVQQLExVodHRwOi8vd3d3LmNhY2VydC5vcmcxIjAgBgNVBAMT GUNBIENlcnQgU2lnbmluZyBBdXRob3JpdHkxITAfBgkqhkiG9w0BCQEWEnN1cHBvcnRAY2Fj ZXJ0Lm9yZwIDEG5VMIGTBgsqhkiG9w0BCRACCzGBg6CBgDB5MRAwDgYDVQQKEwdSb290IENB MR4wHAYDVQQLExVodHRwOi8vd3d3LmNhY2VydC5vcmcxIjAgBgNVBAMTGUNBIENlcnQgU2ln bmluZyBBdXRob3JpdHkxITAfBgkqhkiG9w0BCQEWEnN1cHBvcnRAY2FjZXJ0Lm9yZwIDEG5V MA0GCSqGSIb3DQEBAQUABIICAEtjGY3lUh+S5TUsAFso9KJBg5W0kN6eiIJNFXcTgTWNgdLr SdsyQNCvWb3QrkpC6I10ZVtzmh7yhx++HAbL/BUAjz9ioIo4RLtu+qAXXG5ehqSGNV/oikyw 3txjMXRLrjkT0s8PQdAfjLoL+KBnqBNqumI4RDAgILxKra/OmIxMkilKrM+pMqeQI8m4VHp1 cygtUOTbY2EzfQQOf40kcmTqAVYTmksZ9W48M0zgmFPjsKyP0nlELgsZcwRDe0boZH7CzY8/ RBT3HTukgMZkNYWnGtb+RKB2OzV7xLUz7rfvRidPEf+Y3E7W0HneQ1+tQz7hV5Y8bP7Nu8sE TGaHNBTaDd8j05VQH651lh2DFtVtRo8ZDlK7/14nZeazH8aulqNB63h+N2BjnQlmVYQFLONQ yE4M8BUCZji9cuiAos355ev8XiXzbpBH7ZHVZnDKt5lUdzrPmOttjNCf5KuO/gfaOyzgRhOT iyGBiKiLRhAp0A9iTWderXm9/SPNV9cWqJBeEM9jnHmd/5c0gg5RizIi3uIH99sa/DrV6k69 C1x2KvtXBjxCa3XPbPg9YSu0tavGaY5sHV43slCnDrOjDp4f7z3Kei5aOe/lVuZS6wFlYpxQ xp3WHJHgXXK9mj8/QBJz/vsN6zH34i8vFTeeI8843MwxwWrS8Qh+nfPBPzyOAAAAAAAA --------------ms020306010004040609020307--