diff -r 21274e5950af -r a1f4cb076d2f src/server/public/vfs.h
--- a/src/server/public/vfs.h	Tue Aug 13 22:14:32 2019 +0200
+++ b/src/server/public/vfs.h	Sat Sep 24 16:26:10 2022 +0200
@@ -1,7 +1,7 @@
 /*
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
  *
- * Copyright 2013 Olaf Wintermann. All rights reserved.
+ * Copyright 2018 Olaf Wintermann. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
@@ -48,13 +48,16 @@
 #define VFS_ENTRY         VFSEntry
 
 struct VFS {
-    SYS_FILE (*open)(VFSContext *ctx, char *path, int oflags);
-    int (*stat)(VFSContext *ctx, char *path, struct stat *buf);
+    SYS_FILE (*open)(VFSContext *ctx, const char *path, int oflags);
+    int (*stat)(VFSContext *ctx, const char *path, struct stat *buf);
     int (*fstat)(VFSContext *ctx, SYS_FILE fd, struct stat *buf);
-    VFS_DIR (*opendir)(VFSContext *ctx, char *path);
-    int (*mkdir)(VFSContext *ctx, char *path);
-    int (*unlink)(VFSContext *ctx, char *path);
+    VFS_DIR (*opendir)(VFSContext *ctx, const char *path);
+    VFS_DIR (*fdopendir)(VFSContext *ctx, SYS_FILE fd);
+    int (*mkdir)(VFSContext *ctx, const char *path);
+    int (*unlink)(VFSContext *ctx, const char *path);
+    int (*rmdir)(VFSContext *Ctx, const char *path);
     uint32_t flags;
+    void *instance;
 };
 
 struct VFSContext {
@@ -66,20 +69,21 @@
     ACLListHandle *acllist;
     uint32_t aclreqaccess;
     int vfs_errno;
+    WSBool error_response_set;
 };
 
 struct VFSFile {
     VFSContext *ctx;
-    VFS_IO *io; // IO functions
-    void *data; // private data used by the VFSFile implementation
-    int fd; // native file descriptor if available, or -1
+    VFS_IO *io; /* IO functions */
+    void *data; /* private data used by the VFSFile implementation */
+    int fd; /* native file descriptor if available, or -1 */
 };
 
 struct VFSDir {
     VFSContext *ctx;
     VFS_DIRIO *io;
-    void *data; // private data used by the VFSDir implementation
-    int fd; // native file descriptor if available, or -1
+    void *data; /* private data used by the VFSDir implementation */
+    int fd; /* native file descriptor if available, or -1 */
 };
 
 struct VFSEntry {
@@ -98,6 +102,7 @@
     void (*close)(SYS_FILE fd);
     int (*opt_aioread)(aiocb_s *aiocb);
     int (*opt_aiowrite)(aiocb_s *aiocb);
+    const char* (*opt_getetag)(SYS_FILE fd);
 };
 
 struct VFS_DIRIO {
@@ -105,10 +110,18 @@
     void (*close)(VFS_DIR dir);
 };
 
+typedef void*(*vfs_init_func)(ServerConfiguration *cfg, pool_handle_t *pool, WSConfigNode *config);
+typedef VFS*(*vfs_create_func)(Session *sn, Request *rq, pblock *pb, void *initData);
+
 /*
  * registers a new VFS
  */
-void vfs_add(char *name, VFS *vfs);
+int vfs_register_type(const char *name, vfs_init_func vfsInit, vfs_create_func vfsCreate);
+
+/*
+ * Create a new VFS instance
+ */
+VFS* vfs_create(Session *sn, Request *rq, const char *vfs_class, pblock *pb, void *initData);
 
 /*
  * creates a VFSContext for a Request
@@ -116,19 +129,22 @@
  */
 VFSContext* vfs_request_context(Session *sn, Request *rq);
 
-SYS_FILE vfs_open(VFSContext *ctx, char *path, int oflags);
-SYS_FILE vfs_openRO(VFSContext *ctx, char *path);
-SYS_FILE vfs_openWO(VFSContext *ctx, char *path);
-SYS_FILE vfs_openRW(VFSContext *ctx, char *path);
-int vfs_stat(VFSContext *ctx, char *path, struct stat *buf);
+SYS_FILE vfs_open(VFSContext *ctx, const char *path, int oflags);
+SYS_FILE vfs_openRO(VFSContext *ctx, const char *path);
+SYS_FILE vfs_openWO(VFSContext *ctx, const char *path);
+SYS_FILE vfs_openRW(VFSContext *ctx, const char *path);
+int vfs_stat(VFSContext *ctx, const char *path, struct stat *buf);
 int vfs_fstat(VFSContext *ctx, SYS_FILE fd, struct stat *buf);
+const char * vfs_getetag(SYS_FILE fd);
 void vfs_close(SYS_FILE fd);
-VFS_DIR vfs_opendir(VFSContext *ctx, char *path);
+VFS_DIR vfs_opendir(VFSContext *ctx, const char *path);
+VFS_DIR vfs_fdopendir(VFSContext *ctx, SYS_FILE fd);
 int vfs_readdir(VFS_DIR dir, VFS_ENTRY *entry);
 int vfs_readdir_stat(VFS_DIR dir, VFS_ENTRY *entry);
 void vfs_closedir(VFS_DIR dir);
-int vfs_mkdir(VFSContext *ctx, char *path);
-int vfs_unlink(VFSContext *ctx, char *path);
+int vfs_mkdir(VFSContext *ctx, const char *path);
+int vfs_unlink(VFSContext *ctx, const char *path);
+int vfs_rmdir(VFSContext *ctx, const char *path);
 
 #ifdef	__cplusplus
 }