From owner-freebsd-bugs@freebsd.org Sat Mar 6 09:07:04 2021 Return-Path: Delivered-To: freebsd-bugs@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 6E7E155DCFB for ; Sat, 6 Mar 2021 09:07:04 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mailman.nyi.freebsd.org (unknown [127.0.1.3]) by mx1.freebsd.org (Postfix) with ESMTP id 4DszJ82X0cz3L8l for ; Sat, 6 Mar 2021 09:07:04 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: by mailman.nyi.freebsd.org (Postfix) id 566E755E1CA; Sat, 6 Mar 2021 09:07:04 +0000 (UTC) Delivered-To: bugs@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 5636955E1C9 for ; Sat, 6 Mar 2021 09:07:04 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "R3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4DszJ81Tw2z3LC3 for ; Sat, 6 Mar 2021 09:07:04 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2610:1c1:1:606c::50:1d]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 25C4B209D4 for ; Sat, 6 Mar 2021 09:07:04 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org ([127.0.1.5]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id 126974Uq023497 for ; Sat, 6 Mar 2021 09:07:04 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id 126974MX023496 for bugs@FreeBSD.org; Sat, 6 Mar 2021 09:07:04 GMT (envelope-from bugzilla-noreply@freebsd.org) X-Authentication-Warning: kenobi.freebsd.org: www set sender to bugzilla-noreply@freebsd.org using -f From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 254058] zfs doesn't set mnt_time aka RootOnZFS doesn't work without RTC Date: Sat, 06 Mar 2021 09:07:04 +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: Unspecified X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Only Me X-Bugzilla-Who: peterj@FreeBSD.org X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: bugs@FreeBSD.org 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: quoted-printable 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: 2.1.34 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 06 Mar 2021 09:07:04 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D254058 Bug ID: 254058 Summary: zfs doesn't set mnt_time aka RootOnZFS doesn't work without RTC Product: Base System Version: Unspecified Hardware: Any OS: Any Status: New Severity: Affects Only Me Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: peterj@FreeBSD.org vfs_mountroot() extracts the most recent mnt_time from the mounted filesyst= ems (root and devfs at the time) and passes it to inittodr() as a fallback if t= here isn't a functioning system RTC. This is intended to ensure that things like log timestamps don't go backwards. Unfortunately, only the UFS code actually initialises mnt_time so other root filesystems types will leave mnt_time set to the epoch (1970-01-01 0000Z).= =20 Root on NFS isn't impacted because that uses nfs_mountroot(), which does inittodr() based on the remote filesystem. That leaves ZFS: If a system with root on ZFS doesn't have a functioning RTC then the system time will start at 1970-01-01 0000Z until (eg) NTP fixes it= .=20 This leaves close-to-epoch timestamps strewn throughout the filesystem, whi= ch is annoying. --=20 You are receiving this mail because: You are the assignee for the bug.=