On Mon, Jan 22, 2018 at 8:39 PM, Vivek Goyal <vgoyal@xxxxxxxxxx> wrote: > There is a need to support metacopy dentry in midlayer. That means there > could be a chain of metacopy dentries. > > For example, upper could be metacopy, midlayer lower could be metacopy and > lowest layer could be actual data inode. This means when we copy up actual > data, we should be able to reach to lowest data inode and copy up data from > there. And that means we should keep track of all the dentries in origin > chain which lead to data inode. > > Current ovl_check_origin() logic only looks for one origin dentry. This patch > enhances ovl_check_origin() to continue to follow origin chain and return > all the origin entries found. This is done only if caller of the function > set "follow_chain" argument. > We don't really need to keep the entire chain do we? We can follow chain but keep only the one inode that is not a metacopy inode. All the rest are useless, no? Then we don't create a new type of object - non-dir with numlower > 1. Amir. -- 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
