From nobody Thu Nov 6 03:22:10 2025 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of redhat.com designates 209.132.183.28 as permitted sender) client-ip=209.132.183.28; envelope-from=libvir-list-bounces@redhat.com; helo=mx1.redhat.com; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of redhat.com designates 209.132.183.28 as permitted sender) smtp.mailfrom=libvir-list-bounces@redhat.com; dmarc=pass(p=none dis=none) header.from=redhat.com Return-Path: Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by mx.zohomail.com with SMTPS id 1539091449705500.74289816817713; Tue, 9 Oct 2018 06:24:09 -0700 (PDT) Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id DD87B34CB; Tue, 9 Oct 2018 13:24:07 +0000 (UTC) Received: from colo-mx.corp.redhat.com (colo-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.21]) by smtp.corp.redhat.com (Postfix) with ESMTPS id A82AE6E6FF; Tue, 9 Oct 2018 13:24:07 +0000 (UTC) Received: from lists01.pubmisc.prod.ext.phx2.redhat.com (lists01.pubmisc.prod.ext.phx2.redhat.com [10.5.19.33]) by colo-mx.corp.redhat.com (Postfix) with ESMTP id 544B94CAA0; Tue, 9 Oct 2018 13:24:07 +0000 (UTC) Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) by lists01.pubmisc.prod.ext.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id w99DNvmh002628 for ; Tue, 9 Oct 2018 09:23:57 -0400 Received: by smtp.corp.redhat.com (Postfix) id 1C6CE7821A; Tue, 9 Oct 2018 13:23:57 +0000 (UTC) Received: from localhost.localdomain.com (unknown [10.42.22.189]) by smtp.corp.redhat.com (Postfix) with ESMTP id AEA8C6A96D; Tue, 9 Oct 2018 13:23:48 +0000 (UTC) From: =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= To: qemu-devel@nongnu.org Date: Tue, 9 Oct 2018 14:23:26 +0100 Message-Id: <20181009132330.7549-3-berrange@redhat.com> In-Reply-To: <20181009132330.7549-1-berrange@redhat.com> References: <20181009132330.7549-1-berrange@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 X-loop: libvir-list@redhat.com Cc: Kevin Wolf , qemu-block@nongnu.org, Juan Quintela , libvir-list@redhat.com, Max Reitz , Gerd Hoffmann , =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= , Paolo Bonzini , "Dr. David Alan Gilbert" Subject: [libvirt] [PATCH v3 2/6] nbd: allow authorization with nbd-server-start QMP command X-BeenThere: libvir-list@redhat.com X-Mailman-Version: 2.1.12 Precedence: junk List-Id: Development discussions about the libvirt library & tools List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Sender: libvir-list-bounces@redhat.com Errors-To: libvir-list-bounces@redhat.com X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.29]); Tue, 09 Oct 2018 13:24:08 +0000 (UTC) X-ZohoMail: RDMRC_0 RSF_0 Z_629925259 SPT_0 Content-Type: text/plain; charset="utf-8" From: "Daniel P. Berrange" 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=3Dfred', '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' } } Signed-off-by: Daniel P. Berrange Reviewed-by: Juan Quintela --- blockdev-nbd.c | 11 ++++++++--- hmp.c | 2 +- include/block/nbd.h | 2 +- qapi/block.json | 8 +++++++- 4 files changed, 17 insertions(+), 6 deletions(-) diff --git a/blockdev-nbd.c b/blockdev-nbd.c index 1d170c80b8..c10d6c0c81 100644 --- a/blockdev-nbd.c +++ b/blockdev-nbd.c @@ -23,6 +23,7 @@ typedef struct NBDServerData { QIONetListener *listener; QCryptoTLSCreds *tlscreds; + char *tlsauthz; } NBDServerData; =20 static NBDServerData *nbd_server; @@ -36,7 +37,7 @@ static void nbd_accept(QIONetListener *listener, QIOChann= elSocket *cioc, gpointer opaque) { qio_channel_set_name(QIO_CHANNEL(cioc), "nbd-server"); - nbd_client_new(cioc, nbd_server->tlscreds, NULL, + nbd_client_new(cioc, nbd_server->tlscreds, nbd_server->tlsauthz, nbd_blockdev_client_closed); } =20 @@ -52,6 +53,7 @@ static void nbd_server_free(NBDServerData *server) if (server->tlscreds) { object_unref(OBJECT(server->tlscreds)); } + g_free(server->tlsauthz); =20 g_free(server); } @@ -87,7 +89,7 @@ static QCryptoTLSCreds *nbd_get_tls_creds(const char *id,= Error **errp) =20 =20 void nbd_server_start(SocketAddress *addr, const char *tls_creds, - Error **errp) + const char *tls_authz, Error **errp) { if (nbd_server) { error_setg(errp, "NBD server already running"); @@ -117,6 +119,8 @@ void nbd_server_start(SocketAddress *addr, const char *= tls_creds, } } =20 + nbd_server->tlsauthz =3D g_strdup(tls_authz); + qio_net_listener_set_client_func(nbd_server->listener, nbd_accept, NULL, @@ -131,11 +135,12 @@ void nbd_server_start(SocketAddress *addr, const char= *tls_creds, =20 void qmp_nbd_server_start(SocketAddressLegacy *addr, bool has_tls_creds, const char *tls_creds, + bool has_tls_authz, const char *tls_authz, Error **errp) { SocketAddress *addr_flat =3D socket_address_flatten(addr); =20 - nbd_server_start(addr_flat, tls_creds, errp); + nbd_server_start(addr_flat, tls_creds, tls_authz, errp); qapi_free_SocketAddress(addr_flat); } =20 diff --git a/hmp.c b/hmp.c index 61ef120423..7fc5a6502f 100644 --- a/hmp.c +++ b/hmp.c @@ -2300,7 +2300,7 @@ void hmp_nbd_server_start(Monitor *mon, const QDict *= qdict) goto exit; } =20 - nbd_server_start(addr, NULL, &local_err); + nbd_server_start(addr, NULL, NULL, &local_err); qapi_free_SocketAddress(addr); if (local_err !=3D NULL) { goto exit; diff --git a/include/block/nbd.h b/include/block/nbd.h index d7aa6b24d0..6cb336b45a 100644 --- a/include/block/nbd.h +++ b/include/block/nbd.h @@ -318,7 +318,7 @@ void nbd_client_get(NBDClient *client); void nbd_client_put(NBDClient *client); =20 void nbd_server_start(SocketAddress *addr, const char *tls_creds, - Error **errp); + const char *tls_authz, Error **errp); =20 void nbd_export_bitmap(NBDExport *exp, const char *bitmap, const char *bitmap_export_name, Error **errp); diff --git a/qapi/block.json b/qapi/block.json index 11f01f28ef..812a9b1917 100644 --- a/qapi/block.json +++ b/qapi/block.json @@ -225,6 +225,11 @@ # # @addr: Address on which to listen. # @tls-creds: (optional) ID of the TLS credentials object. Since 2.6 +# @tls-authz: ID of the QAuthZ authorization object used to validate +# the client's x509 distinguished name. This object is +# is only resolved at time of use, so can be deleted and +# recreated on the fly while the NBD server is active. +# If missing, it will default to denying access. Since 3.1 # # Returns: error if the server is already running. # @@ -232,7 +237,8 @@ ## { 'command': 'nbd-server-start', 'data': { 'addr': 'SocketAddressLegacy', - '*tls-creds': 'str'} } + '*tls-creds': 'str', + '*tls-authz': 'str'} } =20 ## # @nbd-server-add: --=20 2.17.1 -- libvir-list mailing list libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list