From owner-freebsd-bugs@freebsd.org Fri Nov 20 21:54:13 2015 Return-Path: Delivered-To: freebsd-bugs@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id BE327A342DB for ; Fri, 20 Nov 2015 21:54:13 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2001:1900:2254:206a::16:76]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 8601512F7 for ; Fri, 20 Nov 2015 21:54:13 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from bugs.freebsd.org ([127.0.1.118]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id tAKLsDqQ046174 for ; Fri, 20 Nov 2015 21:54:13 GMT (envelope-from bugzilla-noreply@freebsd.org) From: bugzilla-noreply@freebsd.org To: freebsd-bugs@FreeBSD.org Subject: [Bug 204705] zfs receive mounts received dataset even if -u is given Date: Fri, 20 Nov 2015 21:54:13 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: 10.2-RELEASE X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Only Me X-Bugzilla-Who: vlad-fbsd@acheronmedia.com X-Bugzilla-Status: New X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: freebsd-bugs@FreeBSD.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_id short_desc product version rep_platform op_sys bug_status bug_severity priority component assigned_to reporter Message-ID: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 20 Nov 2015 21:54:14 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=204705 Bug ID: 204705 Summary: zfs receive mounts received dataset even if -u is given Product: Base System Version: 10.2-RELEASE Hardware: Any OS: Any Status: New Severity: Affects Only Me Priority: --- Component: kern Assignee: freebsd-bugs@FreeBSD.org Reporter: vlad-fbsd@acheronmedia.com It appears that `zfs send -R | zfs receive -Fdu ` will mount the received dataset despite the -u flag. I discovered this sending the root partition having mountpoint=/ which broke devfs. Below is a session done in a clean new (KVM) VM install with two disks to replicate the issue: root@freebsd:~ # zpool status pool: zroot state: ONLINE scan: none requested config: NAME STATE READ WRITE CKSUM zroot ONLINE 0 0 0 vtbd0p2 ONLINE 0 0 0 errors: No known data errors root@freebsd:~ # zpool list NAME SIZE ALLOC FREE EXPANDSZ FRAG CAP DEDUP HEALTH ALTROOT zroot 3.97G 830M 3.16G - 13% 20% 1.00x ONLINE - root@freebsd:~ # zfs list NAME USED AVAIL REFER MOUNTPOINT zroot 830M 3.03G 829M / root@freebsd:~ # zpool list -t snapshot NAME USED AVAIL REFER MOUNTPOINT zroot@test-snapshot 496K - 829M - root@freebsd:~ # zpool create zbackup vtbd1 root@freebsd:~ # zfs create zbackup/backup root@freebsd:~ # zfs list NAME USED AVAIL REFER MOUNTPOINT zbackup 250K 3.84G 19K /zbackup zbackup/backup 19K 3.84G 19K /zbackup/backup zroot 830M 3.03G 829M / root@freebsd:~ # zfs send -R zroot@test-snapshot | zfs receive -Fdu zbackup/backup root@freebsd:~ # zfs list internal error: failed to initialize ZFS library root@freebsd:~ # mount zroot on / (zfs, local, nfsv4acls) devfs on /dev (devfs, local, multilabel) zbackup on /zbackup (zfs, local, nfsv4acls) zbackup/backup on / (zfs, local, nfsv4acls) root@freebsd:~ # mount -t devfs devfs /dev root@freebsd:~ # zfs list NAME USED AVAIL REFER MOUNTPOINT zbackup 829M 3.03G 19K /zbackup zbackup/backup 829M 3.03G 829M / zroot 830M 3.03G 829M / root@freebsd:~ # zfs mount zroot / zbackup /zbackup zbackup/backup / root@freebsd:~ # zpool export zbackup cannot unmount '/': Device busy -- You are receiving this mail because: You are the assignee for the bug.