From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=3.0 tests=MAILING_LIST_MULTI,SPF_PASS, URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0B57FC282D7 for ; Sat, 2 Feb 2019 04:01:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D333D20870 for ; Sat, 2 Feb 2019 04:01:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726410AbfBBEBQ convert rfc822-to-8bit (ORCPT ); Fri, 1 Feb 2019 23:01:16 -0500 Received: from mail.wl.linuxfoundation.org ([198.145.29.98]:45704 "EHLO mail.wl.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726193AbfBBEBP (ORCPT ); Fri, 1 Feb 2019 23:01:15 -0500 Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 1997633192 for ; Sat, 2 Feb 2019 04:01:15 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 0C14A32C42; Sat, 2 Feb 2019 04:01:15 +0000 (UTC) From: bugzilla-daemon@bugzilla.kernel.org To: linux-ext4@vger.kernel.org Subject: [Bug 202485] chmod'ed permission not persisted upon fsync Date: Sat, 02 Feb 2019 04:01:14 +0000 X-Bugzilla-Reason: None X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: AssignedTo fs_ext4@kernel-bugs.osdl.org X-Bugzilla-Product: File System X-Bugzilla-Component: ext4 X-Bugzilla-Version: 2.5 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: vijayc@utexas.edu X-Bugzilla-Status: NEW X-Bugzilla-Resolution: X-Bugzilla-Priority: P1 X-Bugzilla-Assigned-To: fs_ext4@kernel-bugs.osdl.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: cc Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8BIT X-Bugzilla-URL: https://bugzilla.kernel.org/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-Virus-Scanned: ClamAV using ClamSMTP Sender: linux-ext4-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-ext4@vger.kernel.org https://bugzilla.kernel.org/show_bug.cgi?id=202485 Vijay Chidambaram (vijayc@utexas.edu) changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |vijayc@utexas.edu --- Comment #2 from Vijay Chidambaram (vijayc@utexas.edu) --- Hi Seulbae, Adding on to what Ted said, the POSIX standards are not very specific about crash-consistency guarantees. I'd recommend you go through the ext4/btrfs/xfs mailing lists searching for "Vijay Chidambaram", Jayashree Mohan", or "Ashlie Martinez" to find prior discussions and other potential dead-ends. The previous discussions also document the guarantees provided by the widely-used Linux file systems, so that you know what is a bug and what is not. For example, a symlink also does not have crash-consistency guarantees: https://www.spinics.net/lists/linux-btrfs/msg76816.html Our OSDI paper has more details: http://www.cs.utexas.edu/~vijay/papers/osdi18-crashmonkey.pdf Thanks, Vijay Chidambaram, UT Austin -- You are receiving this mail because: You are watching the assignee of the bug.