Arnd Bergmann: > > By the way, how do you think link(2) or rename(2)? When the source file > > exists on the lower writable branch, do you think copy-up is the best > > way? Or do you think all lower branches should be readonly? > > There is an exception in aufs's branch-select policy. That is > > link/rename case. When the source file exists on a writable branch, aufs > > tries link/rename it on that branch in every policy. Do you think it > > best to do it on the top branch only? > > Yes, I tend to consider the union case identical to the cross-mount > move or link, so I'd expect the kernel to return errno=EXDEV and user > space to handle this by doing the appropriate copy/unlink as it does > for other cases already. Aure rename returns EXDEV when the target is a dir and it has child entr(y|ies) on lower branhc(es). And mv(1) handles this case. My Engilsh might be miunderstood. Do you think link(2) should return an error when the target exists on lower writable branch? Junjiro Okajima -- 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
