Introduce virStorageFileIsClusterFS

src/libvirt_private.syms

@@ -1011,6 +1011,7 @@ virStorageFileFormatTypeToString;
 virStorageFileFreeMetadata;
 virStorageFileGetMetadata;
 virStorageFileGetMetadataFromFD;
+virStorageFileIsClusterFS;
 virStorageFileIsSharedFS;
 virStorageFileIsSharedFSType;
 virStorageFileProbeFormat;

src/util/storage_file.c

@@ -1063,3 +1063,13 @@ int virStorageFileIsSharedFS(const char *path)
                                         VIR_STORAGE_FILE_SHFS_OCFS |
                                         VIR_STORAGE_FILE_SHFS_AFS);
 }
+
+int virStorageFileIsClusterFS(const char *path)
+{
+    /* These are coherent cluster filesystems known to be safe for
+     * migration with cache != none
+     */
+    return virStorageFileIsSharedFSType(path,
+                                        VIR_STORAGE_FILE_SHFS_GFS2 |
+                                        VIR_STORAGE_FILE_SHFS_OCFS);
+}

src/util/storage_file.h

@@ -82,6 +82,7 @@ enum {
 };
 
 int virStorageFileIsSharedFS(const char *path);
+int virStorageFileIsClusterFS(const char *path);
 int virStorageFileIsSharedFSType(const char *path,
                                  int fstypes);