encryption: Add luks parsing for storageencryption

Add parse and format of the luks/passphrase secret including tests for
volume XML parsing.

Signed-off-by: John Ferlan <jferlan@redhat.com>

src/qemu/qemu_process.c

@@ -2414,6 +2414,12 @@ qemuProcessInitPasswords(virConnectPtr conn,
             !virDomainDiskGetSource(vm->def->disks[i]))
             continue;
 
+        if (vm->def->disks[i]->src->encryption->format !=
+            VIR_STORAGE_ENCRYPTION_FORMAT_DEFAULT &&
+            vm->def->disks[i]->src->encryption->format !=
+            VIR_STORAGE_ENCRYPTION_FORMAT_QCOW)
+            continue;
+
         VIR_FREE(secret);
         if (qemuProcessGetVolumeQcowPassphrase(conn,
                                                vm->def->disks[i],

src/storage/storage_backend.c

@@ -1027,8 +1027,7 @@ virStorageBackendCreateQemuImgCheckEncryption(int format,
         }
     } else {
         virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
-                       _("qcow volume encryption unsupported with "
-                         "volume format %s"), type);
+                       _("volume encryption unsupported with format %s"), type);
         return -1;
     }
 

src/storage/storage_backend_fs.c

@@ -157,7 +157,12 @@ virStorageBackendProbeTarget(virStorageSourcePtr target,
         case VIR_STORAGE_FILE_QCOW2:
             (*encryption)->format = VIR_STORAGE_ENCRYPTION_FORMAT_QCOW;
             break;
-        default:
+
+        case VIR_STORAGE_FILE_LUKS:
+            (*encryption)->format = VIR_STORAGE_ENCRYPTION_FORMAT_LUKS;
+            break;
+
+        case VIR_STORAGE_ENCRYPTION_FORMAT_LAST:
             break;
         }
 

src/storage/storage_backend_gluster.c

@@ -321,6 +321,8 @@ virStorageBackendGlusterRefreshVol(virStorageBackendGlusterStatePtr state,
         if (vol->target.format == VIR_STORAGE_FILE_QCOW ||
             vol->target.format == VIR_STORAGE_FILE_QCOW2)
             vol->target.encryption->format = VIR_STORAGE_ENCRYPTION_FORMAT_QCOW;
+        if (vol->target.format == VIR_STORAGE_FILE_LUKS)
+            vol->target.encryption->format = VIR_STORAGE_ENCRYPTION_FORMAT_LUKS;
     }
     vol->target.features = meta->features;
     meta->features = NULL;

src/util/virstorageencryption.c

@@ -43,7 +43,7 @@ VIR_ENUM_IMPL(virStorageEncryptionSecret,
 
 VIR_ENUM_IMPL(virStorageEncryptionFormat,
               VIR_STORAGE_ENCRYPTION_FORMAT_LAST,
-              "default", "qcow")
+              "default", "qcow", "luks")
 
 static void
 virStorageEncryptionSecretFree(virStorageEncryptionSecretPtr secret)

src/util/virstorageencryption.h

@@ -48,6 +48,7 @@ typedef enum {
     /* "default" is only valid for volume creation */
     VIR_STORAGE_ENCRYPTION_FORMAT_DEFAULT = 0,
     VIR_STORAGE_ENCRYPTION_FORMAT_QCOW, /* Both qcow and qcow2 */
+    VIR_STORAGE_ENCRYPTION_FORMAT_LUKS,
 
     VIR_STORAGE_ENCRYPTION_FORMAT_LAST,
 } virStorageEncryptionFormatType;