```java
// In Smb2ReadRequest.java
private RdmaChannelInfo rdmaChannelInfo;

public void addRdmaChannelInfo(int remoteKey, long address, int length) {
    this.rdmaChannelInfo = new RdmaChannelInfo(remoteKey, address, length);
}

@Override
protected int writePayload(byte[] dst, int dstIndex) {
    int written = super.writePayload(dst, dstIndex);
    
    if (rdmaChannelInfo != null) {
        // Add RDMA read channel info