The issue is that I was running the fuse mount command as a normal user and mount as root. By default fuse does NOT allow root to access filesystems it creates unless root created them. For me there are 2 work-arounds: - Add sudo in front of my command creating the filesytem - Set an option in /etc/fuse.conf to allow none-owners of a filesystem to use the filesystem. I suspect when I did this in the past I was running as root, so I never noticed the problem. Sorry for the noise, Greg -- Greg Freemyer On Wed, Dec 3, 2014 at 7:12 PM, Greg Freemyer <greg.freemyer@xxxxxxxxx> wrote: > All, > > I don't know if this is a kernel issue or not. I just don't know > where else to look for help. > > I seem to be having a conflict between fuse and loopback devices. I > can get each to work fine independently, but I can get them to work > together. This has worked with older kernels, but I can't get it to > work with a 3.16.6 kernel. > > I'm just guessing the issue is a kernel issue. I really don't want to > have to compile kernels to track this down, but it may come to that. > > All userspace tools I'm using are opensource, so I dod have the > userspace source to work with, although I'm not the author. > > ===== > I'm trying to use a tool (ewfmount) that leverages the fuse kernel > sub-system to merge several files together and also uncompress them. > > Thus I might originally have: > > image.E01 > image.E02 > image.E03 > > where each of those files is a segment of full dd image that has been > compressed. > > If I run "ewfmount image.E01 /mnt" then a virtual file /mnt/ewf1 is > created. That is working fine. > > In the past I have been able to now loopback mount partitions from > that virtual file via: > > mount -t hfsplus -r -o loop,offset=209735680 /mnt/ewf1 /mnt > > Currently that is failing with: > mount: /mnt/ewf1: failed to setup loop device: Permission denied > > Thus loop back seems broken. To test that I copied the virtual file > to a real file via dd. After that mount properly accesses the true > file. > > === > Thus: > > fuse is working right to merge my files together and uncompress them. > > loopback is working right when the object being mounted is a standard file. > > loopback is failing when pointed at the virtual file created by fuse. > === > > I am suspicious of the kernel because this has worked for me in the > pastk but with older kernels. I can't say when it last worked, but at > least a year ago. > > Any suggestions / help appreciated. > > Thanks > Greg > -- > Greg Freemyer _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
