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nbd: allow authorization with nbd-server-start QMP command

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As with the previous patch to qemu-nbd, the nbd-server-start QMP command
also needs to be able to specify authorization when enabling TLS encryption.

First the client must create a QAuthZ object instance using the
'object-add' command:

   {
     'execute': 'object-add',
     'arguments': {
       'qom-type': 'authz-list',
       'id': 'authz0',
       'parameters': {
         'policy': 'deny',
         'rules': [
           {
             'match': '*CN=fred',
             'policy': 'allow'
           }
         ]
       }
     }
   }

They can then reference this in the new 'tls-authz' parameter when
executing the 'nbd-server-start' command:

   {
     'execute': 'nbd-server-start',
     'arguments': {
       'addr': {
           'type': 'inet',
           'host': '127.0.0.1',
           'port': '9000'
       },
       'tls-creds': 'tls0',
       'tls-authz': 'authz0'
     }
   }

Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Message-Id: <20190227162035.18543-3-berrange@redhat.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
This commit is contained in:
Daniel P. Berrange 2019-02-27 16:20:34 +00:00 • committed by Eric Blake
parent b25e12daff
commit 000194556b
4 changed files with 17 additions and 6 deletions
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2
include/block/nbd.h
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@ -332,7 +332,7 @@ void nbd_client_get(NBDClient *client);
void nbd_client_put(NBDClient *client);
void nbd_server_start(SocketAddress *addr, const char *tls_creds,
Error **errp);
const char *tls_authz, Error **errp);
/* nbd_read
* Reads @size bytes from @ioc. Returns 0 on success.