On Mon, Jun 13, 2016 at 1:07 PM, André Roth <neolynx@xxxxxxxxx> wrote: > > Hello, > > I try to use overlay for network boot clients using an NFS read-only > filesystem. This works pretty well, except renaming files with the mv > command fails: > > ========================== > # ls -l > -rw-r--r-- 1 root root 785 Mar 27 2016 foo > > # mv foo bar > mv: cannot move 'foo' to a subdirectory of itself, 'bar' > ========================== > > I mount the overlay filesystem as follows in the initrd, where /root is > already mounted read-only from NFS: > ========================== > mkdir /writable > mkfs.ext2 /dev/ram0 >/dev/null > mount -n /dev/ram0 /writable >/dev/null > > mkdir /writable/upper > mkdir /writable/work > > modprobe overlay > mount -t overlay overlay -olowerdir=/root,upperdir=/writable/upper,workdir=/writable/work,default_permissions /root > ========================== > > kernel version is 4.7.0-rc2, git cloned from > git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs.git, > using the overlayfs-next branch. > > is this a bug ? > can I help anything debugging fixing this ? # echo 'module overlay +mp' > /sys/kernel/debug/dynamic_debug/control # strace -o /tmp/strace mv foo bar # dmesg | grep overlay > /tmp/debug And post the /tmp/strace and /tmp/debug files. Thanks, Miklos -- To unsubscribe from this list: send the line "unsubscribe linux-unionfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
