From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Tue, 24 Jul 2001 16:16:50 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Tue, 24 Jul 2001 16:16:40 -0400 Received: from utopia.booyaka.com ([206.156.231.220]:39098 "HELO utopia.booyaka.com") by vger.kernel.org with SMTP id ; Tue, 24 Jul 2001 16:16:28 -0400 Date: Tue, 24 Jul 2001 15:16:27 -0500 From: Ryan Dooley To: linux-kernel@vger.kernel.org Subject: soft read-only fs Message-ID: <20010724151627.A12709@utopia.booyaka.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 1.0pre3us Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Original-Recipient: rfc822;linux-kernel-outgoing Hi, I was trying to come up with a project to do and I was wondering if anybody had done work on a filesystem to support soft read only mounts. This is something I had seen on our F5 Big-IP boxes. They are based on BSD/OS for those who are intrested. The soft read-only functionality checks to see if files are open for writing. If there are none, the file system gets downgraded to read-only. When a file opens up for writing, the file system is promoted to read-write. It's probably not a necessity with the more journaling filesystems that get working with Linux. I just wanted to make sure I wasn't about to reinvent the wheel (or fs if you like :-) Cheers, Ryan