Loopback fs could no be used inside a tree

[goloveychuk]

Maybe I'm doing smth incorrect, but when I try to render loopback somewhere inside a tree, path is calculated incorrectly, it takes bridge root to calc relative path, but it should take LoopBack root.

go-fuse/fs/loopback.go

Line 88 in e9e7c22

path := n.Path(n.Root())

fix could be to add

func (n *LoopbackNode) Root() *Inode {
	if n.RootData.RootNode != nil {
		return n.RootData.RootNode
	}
	return n.Inode.Root()
}

and replace all inode.Root() usages with loopback.Root(), e.g.

go-fuse/fs/loopback.go

Line 242 in e9e7c22

if inode.Root() != inode && inode.StableAttr().Ino != n.RootData.idFromStat(&st).Ino {

[goloveychuk]

fast "fix"
e0b7bf3