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diff --git a/src/VBox/Additions/solaris/SharedFolders/vboxfs_vfs.h b/src/VBox/Additions/solaris/SharedFolders/vboxfs_vfs.h
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+/* $Id: vboxfs_vfs.h $ */
+/** @file
+ * VirtualBox File System for Solaris Guests, VFS header.
+ */
+
+/*
+ * Copyright (C) 2009-2020 Oracle Corporation
+ *
+ * This file is part of VirtualBox Open Source Edition (OSE), as
+ * available from http://www.virtualbox.org. This file is free software;
+ * you can redistribute it and/or modify it under the terms of the GNU
+ * General Public License (GPL) as published by the Free Software
+ * Foundation, in version 2 as it comes in the "COPYING" file of the
+ * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
+ * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
+ * VirtualBox OSE distribution, in which case the provisions of the
+ * CDDL are applicable instead of those of the GPL.
+ *
+ * You may elect to license modified versions of this file under the
+ * terms and conditions of either the GPL or the CDDL or both.
+ */
+
+#ifndef GA_INCLUDED_SRC_solaris_SharedFolders_vboxfs_vfs_h
+#define GA_INCLUDED_SRC_solaris_SharedFolders_vboxfs_vfs_h
+#ifndef RT_WITHOUT_PRAGMA_ONCE
+# pragma once
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*
+ * Shared Folders filesystem per-mount data structure.
+ */
+typedef struct sffs_data {
+ vfs_t *sf_vfsp; /* filesystem's vfs struct */
+ vnode_t *sf_rootnode; /* of vnode of the root directory */
+ int sf_stat_ttl; /* ttl for stat caches (in ms) */
+ int sf_fsync; /* whether to honor fsync or not */
+ char *sf_share_name;
+ char *sf_mntpath; /* name of mount point */
+ sfp_mount_t *sf_handle;
+ uint64_t sf_ino; /* per FS ino generator */
+} sffs_data_t;
+
+/*
+ * Workaround for older Solaris versions which called map_addr()/choose_addr()/
+ * map_addr_proc() with an 'alignment' argument that was removed in Solaris
+ * 11.4.
+ */
+typedef struct VBoxVFS_SolAddrMap
+{
+ union
+ {
+ void *(*pfnSol_map_addr) (caddr_t *, size_t, offset_t, uint_t);
+ void *(*pfnSol_map_addr_old) (caddr_t *, size_t, offset_t, int, uint_t);
+ } MapAddr;
+
+ union
+ {
+ int (*pfnSol_choose_addr) (struct as *, caddr_t *, size_t, offset_t, uint_t);
+ int (*pfnSol_choose_addr_old) (struct as *, caddr_t *, size_t, offset_t, int, uint_t);
+ } ChooseAddr;
+} VBoxVFS_SolAddrMap;
+typedef VBoxVFS_SolAddrMap *pVBoxVFS_SolAddrMap;
+
+extern bool g_fVBoxVFS_SolOldAddrMap;
+extern VBoxVFS_SolAddrMap g_VBoxVFS_SolAddrMap;
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* !GA_INCLUDED_SRC_solaris_SharedFolders_vboxfs_vfs_h */
+