qemu: prepare secret for the graphics upfront

Instead of hardcoding the TLS creds alias in
qemuBuildGraphicsVNCCommandLine, store it
in the domain private data.

Given that we only support one VNC graphics
and thus have only one alias per-domain,
this is overengineered, but it will allow us
to prepare the secret upfront when we start
supporting encrypted server TLS keys.

Note that the alias is not formatted anywhere
since we won't need to access it after domain
startup.

Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: John Ferlan <jferlan@redhat.com>

diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index 3913ac4c1586c92443dabf46778a07e6ee289c3f..d617f8aa60fb0df932bef9e0211e7b15cd3b0e61 100644 (file)
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -8036,18 +8036,18 @@ qemuBuildGraphicsVNCCommandLine(virQEMUDriverConfigPtr cfg,
         virBufferAddLit(&opt, ",password");
 
     if (cfg->vncTLS) {
-        if (virQEMUCapsGet(qemuCaps, QEMU_CAPS_OBJECT_TLS_CREDS_X509)) {
-            const char *alias = "vnc-tls-creds0";
+        qemuDomainGraphicsPrivatePtr gfxPriv = QEMU_DOMAIN_GRAPHICS_PRIVATE(graphics);
+        if (gfxPriv->tlsAlias) {
             if (qemuBuildTLSx509CommandLine(cmd,
                                             cfg->vncTLSx509certdir,
                                             true,
                                             cfg->vncTLSx509verify,
                                             NULL,
-                                            alias,
+                                            gfxPriv->tlsAlias,
                                             qemuCaps) < 0)
                 goto error;
 
-            virBufferAsprintf(&opt, ",tls-creds=%s", alias);
+            virBufferAsprintf(&opt, ",tls-creds=%s", gfxPriv->tlsAlias);
         } else {
             virBufferAddLit(&opt, ",tls");
             if (cfg->vncTLSx509verify) {

diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c
index 4b11cba1bd4c06b04bdb325d30baec707b9ac33b..b35c217d655cb30424ad4be8d5e59285888a4b5d 100644 (file)
--- a/src/qemu/qemu_domain.c
+++ b/src/qemu/qemu_domain.c
@@ -1726,6 +1726,42 @@ qemuDomainSecretChardevPrepare(virQEMUDriverConfigPtr cfg,
 }
 
 
+static void
+qemuDomainSecretGraphicsDestroy(virDomainGraphicsDefPtr graphics)
+{
+    qemuDomainGraphicsPrivatePtr gfxPriv = QEMU_DOMAIN_GRAPHICS_PRIVATE(graphics);
+
+    if (!gfxPriv)
+        return;
+
+    VIR_FREE(gfxPriv->tlsAlias);
+}
+
+
+static int
+qemuDomainSecretGraphicsPrepare(virQEMUDriverConfigPtr cfg,
+                                qemuDomainObjPrivatePtr priv,
+                                virDomainGraphicsDefPtr graphics)
+{
+    virQEMUCapsPtr qemuCaps = priv->qemuCaps;
+    qemuDomainGraphicsPrivatePtr gfxPriv = QEMU_DOMAIN_GRAPHICS_PRIVATE(graphics);
+
+    if (graphics->type != VIR_DOMAIN_GRAPHICS_TYPE_VNC)
+        return 0;
+
+    if (!virQEMUCapsGet(qemuCaps, QEMU_CAPS_OBJECT_TLS_CREDS_X509))
+        return 0;
+
+    if (!cfg->vncTLS)
+        return 0;
+
+    if (VIR_STRDUP(gfxPriv->tlsAlias, "vnc-tls-creds0") < 0)
+        return -1;
+
+    return 0;
+}
+
+
 /* qemuDomainSecretDestroy:
  * @vm: Domain object
  *
@@ -1767,6 +1803,9 @@ qemuDomainSecretDestroy(virDomainObjPtr vm)
 
     for (i = 0; i < vm->def->nredirdevs; i++)
         qemuDomainSecretChardevDestroy(vm->def->redirdevs[i]->source);
+
+    for (i = 0; i < vm->def->ngraphics; i++)
+        qemuDomainSecretGraphicsDestroy(vm->def->graphics[i]);
 }
 
 
@@ -1850,6 +1889,11 @@ qemuDomainSecretPrepare(virQEMUDriverPtr driver,
             goto cleanup;
     }
 
+    for (i = 0; i < vm->def->ngraphics; i++) {
+        if (qemuDomainSecretGraphicsPrepare(cfg, priv, vm->def->graphics[i]) < 0)
+            goto cleanup;
+    }
+
     ret = 0;
 
  cleanup: