On Fri, Apr 7, 2017 at 11:32 AM, Miklos Szeredi <miklos@xxxxxxxxxx> wrote: > On Thu, Apr 6, 2017 at 6:25 PM, Amir Goldstein <amir73il@xxxxxxxxx> wrote: > When renaming a lower/merged directory or lower non-directory, always > add back-redirect pointer to moved object pointing to original > location, as well as forward-redirect to whiteout at original location > pointing to new location. Possibly could do both with file handle. > Whenever either is moved/created/removed pointers need to be updated. > Hard linking a copied up file would result in duplication of the > forward pointers. Solves the nfs export case, since we can always > find new location of objects based on location on lower layer. This breaks when an ancestor of a forward-redirect is moved/removed. A linked list would still work, but all these are bit fragile. I feel it's better to keep this sort of info out-of-band. 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
