Hello, I'm trying to store a Docker graph directory in a ext4 encypted dir (/mnt/drbd0/docker): - /dev/drbd0 <- ext4 partition - /dev/drbd0 -> mounted on /mnt/drbd0 - /mnt/drbd0/docker <- dir encrypted with ext4 std encryption The Docker daemon runs ok, pulls the images layers as needed but it's unable to mount the ovl. The kernel used is a mainline pure v4.6 manually compiled and running on a standard Gentoo installation. the relevant error line in dmseg are (i.e.) /mnt/drbd0/docker/overlay/446f76c928f35f1e30228c79e89faae2c5c57a814109b602a318e02f264a5e50-init/upper' not supported as upperdir The same error is given even if I use another unencrypted directory on the same partition as my graph directory. Moreover, manually testing with this procedure: - cd /mnt/drbd0/test <- unencryped dir - mkdir lower upper work merged - mount -t overlay overlay -olowerdir=lower,upperdir=upper,workdir=work merged gives exactly the same error. If I run the same procedures (docker and/or the manual test) after formatting the same partition (but keeping the encryption disabled) everything works perfectly. Looking at the code, as far as I'm able to understand, it seems that the check for the dentry flags (DCACHE_OP_REVALIDATE | DCACHE_OP_WEAK_REVALIDATE) in the ovl_dentry_remote() call (file: super.c, line 871) fails and the mount procedure is then aborted. Maybe I have to change some flags on the ext4 fs and I'm missing something? Could someone please give me some hint? Thank you in advance and best regards, Andrew -- 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
