From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from xenbox.codefidence.com ([92.48.73.16]) by bombadil.infradead.org with esmtps (Exim 4.69 #1 (Red Hat Linux)) id 1Ljbfs-0003M5-3q for linux-mtd@lists.infradead.org; Tue, 17 Mar 2009 15:58:00 +0000 Message-ID: <49BFC87D.5050608@codefidence.com> Date: Tue, 17 Mar 2009 17:57:49 +0200 From: Gilad Ben-Yossef MIME-Version: 1.0 To: linux-mtd@lists.infradead.org Subject: Loop back mounted files on UBIFS file system Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Hi All, I am trying to loop back mount a file (which contains a FAT32 file system image), which resides on a UBIFS file system. Command I try: *# losetup -o 4096 /dev/loop/0 /mnt/ubifs/fat32 *** Where /nnt/ubifs/ is the mount point of a valid UBIFS file system. The response I get is: losetup: /dev/loop/0: No such device or address Trying a loopback mount from any other file system (such as tmpfs) works. Trying to do any other activity with the UBIFS file system works as well. Please note that I am NOT trying to loop back mount a file containing a UBIFS file system image and I read the FAQ and understand that this is not directly possible, disregarding nandsim. I am trying to do the opposite - loopback mount a file residing on an UBIFS file system. Googling around I've found another post citing what seems like the very same behaviour. The answer there was a reference to the above mentioned FAQ entry, which I believe is not relevant for the aforementioned reasons. Kernel version is 2.6.24 with the last back ported UBIFS support. I realize that this is an old version and no longer maintained and I'd be happy to try the latest and greatest, just wanted to make sure this is something that is supposed to work rather then that I am trying to do the impossible. Many thanks, Gilad -- Gilad Ben-Yossef Chief Coffee Drinker Codefidence Ltd. The code is free, your time isn't.(TM) Web: http://codefidence.com Email: gilad@codefidence.com Office: +972-8-9316883 ext. 201 Fax: +972-8-9316885 Mobile: +972-52-8260388 The Doctor: Don't worry, Reinette, just a nightmare. Everyone has nightmares. Even monsters from under the bed have nightmares, don't you, monster? Reinette: What do monsters have nightmares about? The Doctor: Me!