qemu: process: assign node names for user defined backing chains

Prepare the full backing chain by instantiating authentication and TLS
transport secrets and other necessary objects so that we can add the
full backing chain explicitly to qemu. This also includes allocation of
nodenames for the individual backing chain members.

Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>

diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c
index 2d78210770c5aabc0f2befe1c3179a181a16411f..75b5e916b4ed33b73613277eee6f1f055e3b20b7 100644 (file)
--- a/src/qemu/qemu_domain.c
+++ b/src/qemu/qemu_domain.c
@@ -137,6 +137,14 @@ static virClassPtr qemuDomainSaveCookieClass;
 static void qemuDomainLogContextDispose(void *obj);
 static void qemuDomainSaveCookieDispose(void *obj);
 
+
+static int
+qemuDomainPrepareStorageSourceBlockdev(virDomainDiskDefPtr disk,
+                                       virStorageSourcePtr src,
+                                       qemuDomainObjPrivatePtr priv,
+                                       virQEMUDriverConfigPtr cfg);
+
+
 static int
 qemuDomainOnceInit(void)
 {
@@ -8653,6 +8661,10 @@ qemuDomainDetermineDiskChain(virQEMUDriverPtr driver,
 
         if (qemuDomainPrepareDiskSourceData(disk, n, cfg, priv->qemuCaps) < 0)
             goto cleanup;
+
+        if (virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_BLOCKDEV) &&
+            qemuDomainPrepareStorageSourceBlockdev(disk, n, priv, cfg) < 0)
+            goto cleanup;
     }
 
     ret = 0;
@@ -13103,6 +13115,62 @@ qemuDomainPrepareDiskSourceLegacy(virDomainDiskDefPtr disk,
 }
 
 
+static int
+qemuDomainPrepareStorageSourceBlockdev(virDomainDiskDefPtr disk,
+                                       virStorageSourcePtr src,
+                                       qemuDomainObjPrivatePtr priv,
+                                       virQEMUDriverConfigPtr cfg)
+{
+    src->id = qemuDomainStorageIdNew(priv);
+
+    if (virAsprintf(&src->nodestorage, "libvirt-%u-storage", src->id) < 0 ||
+        virAsprintf(&src->nodeformat, "libvirt-%u-format", src->id) < 0)
+        return -1;
+
+    if (qemuDomainValidateStorageSource(src, priv->qemuCaps) < 0)
+        return -1;
+
+    if (qemuDomainPrepareDiskSourceData(disk, src, cfg, priv->qemuCaps) < 0)
+        return -1;
+
+    if (qemuDomainSecretStorageSourcePrepare(priv, src,
+                                             src->nodestorage,
+                                             src->nodeformat) < 0)
+        return -1;
+
+    if (qemuDomainPrepareStorageSourcePR(disk->src, priv, src->nodestorage) < 0)
+        return -1;
+
+    if (qemuDomainPrepareStorageSourceTLS(disk->src, cfg, src->nodestorage,
+                                          priv->qemuCaps) < 0)
+        return -1;
+
+    return 0;
+}
+
+
+static int
+qemuDomainPrepareDiskSourceBlockdev(virDomainDiskDefPtr disk,
+                                    qemuDomainObjPrivatePtr priv,
+                                    virQEMUDriverConfigPtr cfg)
+{
+    qemuDomainDiskPrivatePtr diskPriv = QEMU_DOMAIN_DISK_PRIVATE(disk);
+    virStorageSourcePtr n;
+
+    if (disk->copy_on_read == VIR_TRISTATE_SWITCH_ON &&
+        !diskPriv->nodeCopyOnRead &&
+        virAsprintf(&diskPriv->nodeCopyOnRead, "libvirt-CoR-%s", disk->dst) < 0)
+        return -1;
+
+    for (n = disk->src; virStorageSourceIsBacking(n); n = n->backingStore) {
+        if (qemuDomainPrepareStorageSourceBlockdev(disk, n, priv, cfg) < 0)
+            return -1;
+    }
+
+    return 0;
+}
+
+
 int
 qemuDomainPrepareDiskSource(virDomainDiskDefPtr disk,
                             qemuDomainObjPrivatePtr priv,
@@ -13110,8 +13178,13 @@ qemuDomainPrepareDiskSource(virDomainDiskDefPtr disk,
 {
     qemuDomainPrepareDiskCachemode(disk);
 
-    if (qemuDomainPrepareDiskSourceLegacy(disk, priv, cfg) < 0)
-        return -1;
+    if (virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_BLOCKDEV)) {
+        if (qemuDomainPrepareDiskSourceBlockdev(disk, priv, cfg) < 0)
+            return -1;
+    } else {
+        if (qemuDomainPrepareDiskSourceLegacy(disk, priv, cfg) < 0)
+            return -1;
+    }
 
     return 0;
 }