fix leaking goroutines (#7291)

* fix leaking goroutines

* simplify

* simplify

weed/mount/weedfs_file_lseek.go

@@ -58,10 +58,14 @@ func (wfs *WFS) Lseek(cancel <-chan struct{}, in *fuse.LseekIn, out *fuse.LseekO
 
 	// Create a context that will be cancelled when the cancel channel receives a signal
 	ctx, cancelFunc := context.WithCancel(context.Background())
+	defer cancelFunc() // Ensure cleanup
+
 	go func() {
 		select {
 		case <-cancel:
 			cancelFunc()
+		case <-ctx.Done():
+			// Clean exit when lseek operation completes
 		}
 	}()
 

weed/mount/weedfs_file_read.go

@@ -49,14 +49,13 @@ func (wfs *WFS) Read(cancel <-chan struct{}, in *fuse.ReadIn, buff []byte) (fuse
 
 	// Create a context that will be cancelled when the cancel channel receives a signal
 	ctx, cancelFunc := context.WithCancel(context.Background())
-	defer cancelFunc()
-	
+	defer cancelFunc() // Ensure cleanup
+
 	go func() {
 		select {
 		case <-cancel:
 			cancelFunc()
 		case <-ctx.Done():
-			// Context already cancelled, exit goroutine
 		}
 	}()