stopFn := globalSftpMetrics.log(r, f.AccessKey())
	defer stopFn(0, err)

	clnt, err := f.getMinIOClient()
	if err != nil {
		return err
	}

	switch r.Method {
	case "Setstat", "Rename", "Link", "Symlink":
		return sftp.ErrSSHFxOpUnsupported

	case "Rmdir":
		bucket, prefix := path2BucketObject(r.Filepath)
		if bucket == "" {
			return errors.New("deleting all buckets not allowed")

        registration.setState(WitnessRegistrationState.REGISTERED);
        assertEquals(WitnessRegistrationState.REGISTERED, registration.getState());

        registration.setState(WitnessRegistrationState.UNREGISTERING);
        assertEquals(WitnessRegistrationState.UNREGISTERING, registration.getState());

        registration.setState(WitnessRegistrationState.FAILED);

        assertEquals(ChannelState.ESTABLISHED, channelInfo.getState());
        assertTrue(channelInfo.isHealthy());

        channelInfo.setState(ChannelState.ACTIVE);
        assertTrue(channelInfo.isHealthy());

        channelInfo.setState(ChannelState.FAILED);
        assertFalse(channelInfo.isHealthy());
    }

    @Test
    void testActivityTracking() {

        channel.setState(ChannelState.ESTABLISHED);

        // Simulate failure
        IOException failure = new IOException("Connection lost");
        failover.handleFailure(channel, failure);

        // Verify channel state changed
        assertFalse(channel.isHealthy());
        assertEquals(ChannelState.FAILED, channel.getState());
    }

    @Test

                WitnessRegisterResponse response = rpcClient.register(request);

                if (response != null && response.isSuccess()) {
                    registration.setState(WitnessRegistrationState.REGISTERED);
                    registration.setContextHandle(response.getContextHandle());
                    registrations.put(registration.getRegistrationId(), registration);

      boolean isDone() {
        return (getState() & (COMPLETED | CANCELLED | INTERRUPTED)) != 0;
      }

      /** Checks if the state is {@link #CANCELLED} or {@link #INTERRUPTED}. */
      boolean isCancelled() {
        return (getState() & (CANCELLED | INTERRUPTED)) != 0;
      }

      /** Checks if the state is {@link #INTERRUPTED}. */

        failedChannel.setState(ChannelState.ESTABLISHED);

        when(mockChannelManager.getLoadBalancer()).thenReturn(mockLoadBalancer);
    }

    @Test
    void testHandleFailure() {
        IOException error = new IOException("Connection failed");

        failover.handleFailure(failedChannel, error);

        assertEquals(ChannelState.FAILED, failedChannel.getState());

    public InetAddress getServerAddress() { return serverAddress; }
    public WitnessServiceType getServiceType() { return serviceType; }
    public WitnessRegistrationState getState() { return state; }
    public void setState(WitnessRegistrationState state) { this.state = state; }
}
```

### 4.2 Witness Notification
```java
package jcifs.internal.witness;

import java.util.List;

     *
     * @return the current registration state
     */
    public WitnessRegistrationState getState() {
        return state;
    }

    /**
     * Sets the registration state.
     *
     * @param state the new registration state
     */
    public void setState(WitnessRegistrationState state) {
        this.state = state;
    }

    /**
     * Gets the registration flags.

        
        // Establish connection
        channel.setState(ChannelState.CONNECTING);
        transport.connect();
        
        // Perform channel binding
        performChannelBinding(channel);
        
        // Add to active channels
        channels.put(channelId, channel);
        channel.setState(ChannelState.ESTABLISHED);