src/server/pfs/fuse/file.go
func (c *counter) cancel() {
	c.mu.Lock()
	defer c.mu.Unlock()
	c.n = math.MaxInt64
}
func (c *counter) cancel() {
	c.mu.Lock()
	defer c.mu.Unlock()
	c.n = math.MaxInt64
}
func ( c * counter ) cancel ( ) { c . mu . Lock ( ) defer c . mu . Unlock ( ) c . n = math . MaxInt64 }
// cancel indicates that an error has occurred which will prevent any further
// calls to Write, it causes all calls to wait() to return
cancel indicates that an error has occurred which will prevent any further calls to Write it causes all calls to wait () to return