Hi, Miklos We are testing and evaluating overlayfs on our machines now. It is stable but we feel unsure about the ovl_link. Imaging using ext4 as upperdir which has a file "hello" and lowdir is totally empty. 1. mount -t overlayfs overlayfs -o lowerdir=/lower,upperdir=/upper /overlay 2. cd /overlay 3. ln hello bye then the overlayfs code will call vfs_link to create a real ext4 dentry for "bye" and create a new overlayfs dentry point to overlayfs inode (which standed for "hello"). That means: two overlayfs dentries and only one overlayfs inode. now we continue 4. umount /overlay 5. mount -t overlayfs overlayfs -o lowerdir=/lower,upperdir=/upper /overlay (again) 6. cd /overlay 7. ls hello bye then the overlayfs will create two inodes(one for the "hello", another for the "bye") and two dentries (each point a inode).That means: two dentries and two inodes. As above, with different order of "create link" and "mount", the result is not the same. My question is: Why not create a new overlayfs inode for "bye" and a new overrlayfs dentry to point it when user do "ln hello bye" ? Thanks -- -- Best Regard Robin Dong -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
