nbd: enable use of TLS with NBD block driver

This modifies the NBD driver so that it is possible to request
use of TLS. This is done by providing the 'tls-creds' parameter
with the ID of a previously created QCryptoTLSCreds object.

For example

  $QEMU -object tls-creds-x509,id=tls0,endpoint=client,\
                dir=/home/berrange/security/qemutls \
        -drive driver=nbd,host=localhost,port=9000,tls-creds=tls0

The client will drop the connection if the NBD server does not
provide TLS.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Message-Id: <1455129674-17255-15-git-send-email-berrange@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/block/nbd-client.h b/block/nbd-client.h
index e8b3283382..53f116d017 100644
--- a/block/nbd-client.h
+++ b/block/nbd-client.h
@@ -39,6 +39,8 @@ NbdClientSession *nbd_get_client_session(BlockDriverState *bs);
 int nbd_client_init(BlockDriverState *bs,
                     QIOChannelSocket *sock,
                     const char *export_name,
+                    QCryptoTLSCreds *tlscreds,
+                    const char *hostname,
                     Error **errp);
 void nbd_client_close(BlockDriverState *bs);