I tried following the directions at: http://funionfs.apiou.org/articles.php?lng=en&pg=11 I'm using: kernel-2.6.23.14-107.fc8 funionfs-0.4.3-1.fc8 fuse-2.7.0-8.fc8 I'm able to mount the unionfs and make some modifications, but a number of things fail, notably mkdir. I'm setting things up with: # mkdir /mnt/test-base /mnt/test-overlay /mnt/test-union # funionfs -o dirs=/mnt/test-base=RO:/mnt/test-overlay -o allow_other NONE /mnt/test-union (I've also tried with the mount syntax, and gotten the same behavior). Perhaps I'm missing something. If so, please enlighten me. I can create a new file by writing to it: # cd /mnt/test-union/ # echo hello >new_file # cat new_file hello but other things fail: # mkdir /mnt/test-union/new_dir mkdir: cannot create directory `/mnt/test-union/new_dir': No such file or directory oddly enough, this also fails for an existing file (nomatter which underlying fs it lives on): # echo hello >/mnt/test-union/some_file -bash: /mnt/test-union/some_file: File exists It seems to be the O_TRUNC flag that causes the error. # python -c 'import os; fd = os.open("new_file", os.O_CREAT|os.O_RDWR|os.O_TRUNC)' Traceback (most recent call last): File "<string>", line 1, in <module> # python -c 'import os; fd = os.open("new_file", os.O_CREAT|os.O_RDWR)' (succeeds)
Adding myself to cc as i can't find any union filesystem working in f9 at the moment and i badly need one..
Stephan - I haven't tried with f9 yet, but I was able to apply the unionfs patch (non-FUSE) to the f8 kernel and get things working. http://www.am-utils.org/project-unionfs.html
Stephan, could you try to use unionfs-fuse? Like funionfs it is fuse based, but very actively maintained. If you ever have problem with it, please report to the mailing list. Thanks, Bernd
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I'm experiencing this problem on Fedora 14.
(In reply to comment #6) > I'm experiencing this problem on Fedora 14. me as well!
F17 has the same problem with no alternatives in sight