util: storage: Add 'ssh' network storage protocol

Allow using 'ssh' protocol in backing chains and later for disks
themselves.

src/libxl/libxl_conf.c

@@ -581,6 +581,7 @@ libxlMakeNetworkDiskSrcStr(virStorageSourcePtr src,
     case VIR_STORAGE_NET_PROTOCOL_ISCSI:
     case VIR_STORAGE_NET_PROTOCOL_GLUSTER:
     case VIR_STORAGE_NET_PROTOCOL_SHEEPDOG:
+    case VIR_STORAGE_NET_PROTOCOL_SSH:
     case VIR_STORAGE_NET_PROTOCOL_LAST:
     case VIR_STORAGE_NET_PROTOCOL_NONE:
         virReportError(VIR_ERR_NO_SUPPORT,

src/qemu/qemu_command.c

@@ -480,6 +480,9 @@ qemuNetworkDriveGetPort(int protocol,
         case VIR_STORAGE_NET_PROTOCOL_NBD:
             return 10809;
 
+        case VIR_STORAGE_NET_PROTOCOL_SSH:
+            return 22;
+
         case VIR_STORAGE_NET_PROTOCOL_ISCSI:
         case VIR_STORAGE_NET_PROTOCOL_GLUSTER:
             /* no default port specified */
@@ -878,6 +881,10 @@ qemuBuildNetworkDriveURI(virStorageSourcePtr src,
             ret = virBufferContentAndReset(&buf);
             break;
 
+        case VIR_STORAGE_NET_PROTOCOL_SSH:
+            virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+                           _("'ssh' protocol is not yet supported"));
+            goto cleanup;
 
         case VIR_STORAGE_NET_PROTOCOL_LAST:
         case VIR_STORAGE_NET_PROTOCOL_NONE:

src/qemu/qemu_driver.c

@@ -13373,6 +13373,7 @@ qemuDomainSnapshotPrepareDiskExternalBackingInactive(virDomainDiskDefPtr disk)
         case VIR_STORAGE_NET_PROTOCOL_FTP:
         case VIR_STORAGE_NET_PROTOCOL_FTPS:
         case VIR_STORAGE_NET_PROTOCOL_TFTP:
+        case VIR_STORAGE_NET_PROTOCOL_SSH:
         case VIR_STORAGE_NET_PROTOCOL_LAST:
             virReportError(VIR_ERR_INTERNAL_ERROR,
                            _("external inactive snapshots are not supported on "
@@ -13435,6 +13436,7 @@ qemuDomainSnapshotPrepareDiskExternalOverlayActive(virDomainSnapshotDiskDefPtr d
         case VIR_STORAGE_NET_PROTOCOL_FTP:
         case VIR_STORAGE_NET_PROTOCOL_FTPS:
         case VIR_STORAGE_NET_PROTOCOL_TFTP:
+        case VIR_STORAGE_NET_PROTOCOL_SSH:
         case VIR_STORAGE_NET_PROTOCOL_LAST:
             virReportError(VIR_ERR_INTERNAL_ERROR,
                            _("external active snapshots are not supported on "
@@ -13579,6 +13581,7 @@ qemuDomainSnapshotPrepareDiskInternal(virConnectPtr conn,
         case VIR_STORAGE_NET_PROTOCOL_FTP:
         case VIR_STORAGE_NET_PROTOCOL_FTPS:
         case VIR_STORAGE_NET_PROTOCOL_TFTP:
+        case VIR_STORAGE_NET_PROTOCOL_SSH:
         case VIR_STORAGE_NET_PROTOCOL_LAST:
             virReportError(VIR_ERR_INTERNAL_ERROR,
                            _("internal inactive snapshots are not supported on "

src/qemu/qemu_parse_command.c

@@ -2014,6 +2014,7 @@ qemuParseCommandLine(virCapsPtr caps,
                 case VIR_STORAGE_NET_PROTOCOL_FTP:
                 case VIR_STORAGE_NET_PROTOCOL_FTPS:
                 case VIR_STORAGE_NET_PROTOCOL_TFTP:
+                case VIR_STORAGE_NET_PROTOCOL_SSH:
                 case VIR_STORAGE_NET_PROTOCOL_LAST:
                 case VIR_STORAGE_NET_PROTOCOL_NONE:
                     /* ignored for now */

src/util/virstoragefile.c

@@ -84,7 +84,8 @@ VIR_ENUM_IMPL(virStorageNetProtocol, VIR_STORAGE_NET_PROTOCOL_LAST,
               "https",
               "ftp",
               "ftps",
-              "tftp")
+              "tftp",
+              "ssh")
 
 VIR_ENUM_IMPL(virStorageNetHostTransport, VIR_STORAGE_NET_HOST_TRANS_LAST,
               "tcp",
@@ -2501,6 +2502,7 @@ virStorageSourceParseBackingColon(virStorageSourcePtr src,
     case VIR_STORAGE_NET_PROTOCOL_TFTP:
     case VIR_STORAGE_NET_PROTOCOL_ISCSI:
     case VIR_STORAGE_NET_PROTOCOL_GLUSTER:
+    case VIR_STORAGE_NET_PROTOCOL_SSH:
         virReportError(VIR_ERR_INTERNAL_ERROR,
                        _("malformed backing store path for protocol %s"),
                        protocol);

src/util/virstoragefile.h

@@ -132,6 +132,7 @@ typedef enum {
     VIR_STORAGE_NET_PROTOCOL_FTP,
     VIR_STORAGE_NET_PROTOCOL_FTPS,
     VIR_STORAGE_NET_PROTOCOL_TFTP,
+    VIR_STORAGE_NET_PROTOCOL_SSH,
 
     VIR_STORAGE_NET_PROTOCOL_LAST
 } virStorageNetProtocol;

src/xenconfig/xen_xl.c

@@ -727,6 +727,7 @@ xenFormatXLDiskSrcNet(virStorageSourcePtr src)
     case VIR_STORAGE_NET_PROTOCOL_ISCSI:
     case VIR_STORAGE_NET_PROTOCOL_GLUSTER:
     case VIR_STORAGE_NET_PROTOCOL_SHEEPDOG:
+    case VIR_STORAGE_NET_PROTOCOL_SSH:
     case VIR_STORAGE_NET_PROTOCOL_LAST:
     case VIR_STORAGE_NET_PROTOCOL_NONE:
         virReportError(VIR_ERR_NO_SUPPORT,