Method notifyChangeUpstream

backend/cache/cache.go:872–880

notifyChangeUpstream will loop through all the upstreams and notify of the provided remote (should be only a dir)

(remote string, entryType fs.EntryType)

// notifyChangeUpstream will loop through all the upstreams and notify
// of the provided remote (should be only a dir)
func (f *Fs) notifyChangeUpstream(remote string, entryType fs.EntryType) {
	f.parentsForgetMu.Lock()
	defer f.parentsForgetMu.Unlock()
	if len(f.parentsForgetFn) > 0 {
		for _, fn := range f.parentsForgetFn {
			fn(remote, entryType)
		}
	}
}

// ChangeNotify can subscribe multiple callers
// this is coupled with the wrapped fs ChangeNotify (if it supports it)