On Fri, Oct 21, 2016 at 11:13 AM, Amir Goldstein <amir73il@xxxxxxxxx> wrote: > I think it would be a good idea in general to stabilize the overlay ino/dev > throughout copy-up, same as Miklos suggested to do for directories, to > all files: > pure upper uses upper ino + overlayfs dev > non-pure upper uses lower ino + overlayfs dev Making st_ino, st_dev and d_ino behave consistently would be the next big step. The above scheme only works if lower and upper are on the same filesystem. Otherwise there can be collisions between the lower and upper inode numbers. Perhaps you meant: - pure upper uses upper ino + upper dev - non-pure upper uses lower ino + overlayfs dev It works for the single lower layer case, but again breaks if there are multiple lower layers. And d_ino in a merged directory could still get us into trouble. And find -xdev would not do what you'd expect with a "normal" filesystem. So there doesn't appear to be any easy solutions to this... Thanks, Miklos -- 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
