Adding upstream version 2:4.20.0+dfsg.upstream/2%4.20.0+dfsg

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

5 files changed, 2646 insertions, 0 deletions

diff --git a/examples/VFS/README b/examples/VFS/README
new file mode 100644
index 0000000..dc99e20
--- /dev/null
+++ b/examples/VFS/README
@@ -0,0 +1,20 @@
+README for Samba Virtual File System (VFS) Example
+===================================================
+
+This directory contains skeleton VFS modules.  When used,
+this module simply passes all requests back to the disk functions
+(i.e it operates as a passthrough filter).  It should be
+useful as a starting point for developing new VFS
+modules. 
+
+Please look at skel_opaque.c when you want your module to provide
+final functions, like a database filesystem.
+
+Please look at skel_transparent.c when you want your module to provide
+passthrough functions, like audit modules. 
+
+Please read the VFS chapter in the HOWTO collection for general help 
+on the usage of VFS modules.
+
+Further documentation on writing VFS modules for Samba can be found in
+Samba Developers Guide.
diff --git a/examples/VFS/shadow_copy_test.c b/examples/VFS/shadow_copy_test.c
new file mode 100644
index 0000000..157e576
--- /dev/null
+++ b/examples/VFS/shadow_copy_test.c
@@ -0,0 +1,92 @@
+/* 
+ * TEST implementation of an Shadow Copy module
+ *
+ * Copyright (C) Stefan Metzmacher	2003
+ * Copyright (C) Jeremy Allison 2009.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *  
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *  
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "../source3/include/includes.h"
+#include "ntioctl.h"
+
+#undef DBGC_CLASS
+#define DBGC_CLASS DBGC_VFS
+
+/* USE THIS MODULE ONLY FOR TESTING!!!! */
+
+/*    
+    For this share
+    Z:\
+
+    the ShadowCopies are in these directories
+
+    Z:\@GMT-2003.08.05-12.00.00\
+    Z:\@GMT-2003.08.05-12.01.00\
+    Z:\@GMT-2003.08.05-12.02.00\
+
+    e.g.
+    
+    Z:\testfile.txt
+    Z:\@GMT-2003.08.05-12.02.00\testfile.txt
+
+    or:
+
+    Z:\testdir\testfile.txt
+    Z:\@GMT-2003.08.05-12.02.00\testdir\testfile.txt
+
+
+    Note: Files must differ to be displayed via Windows Explorer!
+	  Directories are always displayed...    
+*/
+
+static int test_get_shadow_copy_data(vfs_handle_struct *handle,
+				    files_struct *fsp,
+				    struct shadow_copy_data *shadow_copy_data,
+				    bool labels)
+{
+	uint32_t num = 3;
+	uint32_t i;
+	
+	shadow_copy_data->num_volumes = num;
+	
+	if (labels) {	
+		if (num) {
+			shadow_copy_data->labels = talloc_zero_array(shadow_copy_data,SHADOW_COPY_LABEL,num);
+		} else {
+			shadow_copy_data->labels = NULL;
+		}
+		for (i=0;i<num;i++) {
+			snprintf(shadow_copy_data->labels[i], sizeof(SHADOW_COPY_LABEL), "@GMT-2003.08.05-12.%02u.00",i);
+		}
+	} else {
+		shadow_copy_data->labels = NULL;
+	}
+
+	return 0;
+}
+
+/* VFS operations structure */
+
+static struct vfs_fn_pointers vfs_test_shadow_copy_fns = {
+	.get_shadow_copy_data_fn = test_get_shadow_copy_data
+};
+
+static_decl_vfs;
+NTSTATUS vfs_shadow_copy_test_init(TALLOC_CTX *ctx)
+{
+	return smb_register_vfs(SMB_VFS_INTERFACE_VERSION,
+				"shadow_copy_test",
+				&vfs_test_shadow_copy_fns);
+}
diff --git a/examples/VFS/skel_opaque.c b/examples/VFS/skel_opaque.c
new file mode 100644
index 0000000..255fa83
--- /dev/null
+++ b/examples/VFS/skel_opaque.c
@@ -0,0 +1,1099 @@
+/* 
+ * Skeleton VFS module.  Implements dummy versions of all VFS
+ * functions.
+ *
+ * Copyright (C) Tim Potter, 1999-2000
+ * Copyright (C) Alexander Bokovoy, 2002
+ * Copyright (C) Stefan (metze) Metzmacher, 2003
+ * Copyright (C) Jeremy Allison 2009
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *  
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *  
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "../source3/include/includes.h"
+#include "lib/util/tevent_unix.h"
+#include "lib/util/tevent_ntstatus.h"
+
+/* PLEASE,PLEASE READ THE VFS MODULES CHAPTER OF THE 
+   SAMBA DEVELOPERS GUIDE!!!!!!
+ */
+
+/* If you take this file as template for your module
+ * you must re-implement every function.
+ */
+
+static int skel_connect(vfs_handle_struct *handle, const char *service,
+			const char *user)
+{
+	errno = ENOSYS;
+	return -1;
+}
+
+static void skel_disconnect(vfs_handle_struct *handle)
+{
+	;
+}
+
+static uint64_t skel_disk_free(vfs_handle_struct *handle,
+				const struct smb_filename *smb_fname,
+				uint64_t *bsize,
+				uint64_t *dfree,
+				uint64_t *dsize)
+{
+	*bsize = 0;
+	*dfree = 0;
+	*dsize = 0;
+	return 0;
+}
+
+static int skel_get_quota(vfs_handle_struct *handle,
+				const struct smb_filename *smb_fname,
+				enum SMB_QUOTA_TYPE qtype,
+				unid_t id,
+				SMB_DISK_QUOTA *dq)
+{
+	errno = ENOSYS;
+	return -1;
+}
+
+static int skel_set_quota(vfs_handle_struct *handle, enum SMB_QUOTA_TYPE qtype,
+			  unid_t id, SMB_DISK_QUOTA *dq)
+{
+	errno = ENOSYS;
+	return -1;
+}
+
+static int skel_get_shadow_copy_data(vfs_handle_struct *handle,
+				     files_struct *fsp,
+				     struct shadow_copy_data *shadow_copy_data,
+				     bool labels)
+{
+	errno = ENOSYS;
+	return -1;
+}
+
+static int skel_statvfs(struct vfs_handle_struct *handle,
+				const struct smb_filename *smb_fname,
+				struct vfs_statvfs_struct *statbuf)
+{
+	errno = ENOSYS;
+	return -1;
+}
+
+static uint32_t skel_fs_capabilities(struct vfs_handle_struct *handle,
+				     enum timestamp_set_resolution *p_ts_res)
+{
+	return 0;
+}
+
+static NTSTATUS skel_get_dfs_referrals(struct vfs_handle_struct *handle,
+				       struct dfs_GetDFSReferral *r)
+{
+	return NT_STATUS_NOT_IMPLEMENTED;
+}
+
+static NTSTATUS skel_create_dfs_pathat(struct vfs_handle_struct *handle,
+				struct files_struct *dirfsp,
+				const struct smb_filename *smb_fname,
+				const struct referral *reflist,
+				size_t referral_count)
+{
+	return NT_STATUS_NOT_IMPLEMENTED;
+}
+
+static NTSTATUS skel_read_dfs_pathat(struct vfs_handle_struct *handle,
+				TALLOC_CTX *mem_ctx,
+				struct files_struct *dirfsp,
+				struct smb_filename *smb_fname,
+				struct referral **ppreflist,
+				size_t *preferral_count)
+{
+	return NT_STATUS_NOT_IMPLEMENTED;
+}
+
+static NTSTATUS skel_snap_check_path(struct vfs_handle_struct *handle,
+				     TALLOC_CTX *mem_ctx,
+				     const char *service_path,
+				     char **base_volume)
+{
+	return NT_STATUS_NOT_SUPPORTED;
+}
+
+static NTSTATUS skel_snap_create(struct vfs_handle_struct *handle,
+				 TALLOC_CTX *mem_ctx,
+				 const char *base_volume,
+				 time_t *tstamp,
+				 bool rw,
+				 char **base_path,
+				 char **snap_path)
+{
+	return NT_STATUS_NOT_SUPPORTED;
+}
+
+static NTSTATUS skel_snap_delete(struct vfs_handle_struct *handle,
+				 TALLOC_CTX *mem_ctx,
+				 char *base_path,
+				 char *snap_path)
+{
+	return NT_STATUS_NOT_SUPPORTED;
+}
+
+static DIR *skel_fdopendir(vfs_handle_struct *handle, files_struct *fsp,
+			   const char *mask, uint32_t attr)
+{
+	return NULL;
+}
+
+static struct dirent *skel_readdir(vfs_handle_struct *handle,
+				   struct files_struct *dirfsp,
+				   DIR *dirp)
+{
+	return NULL;
+}
+
+static void skel_rewind_dir(vfs_handle_struct *handle, DIR *dirp)
+{
+	;
+}
+
+static int skel_mkdirat(vfs_handle_struct *handle,
+		struct files_struct *dirfsp,
+		const struct smb_filename *smb_fname,
+		mode_t mode)
+{
+	errno = ENOSYS;
+	return -1;
+}
+
+static int skel_closedir(vfs_handle_struct *handle, DIR *dir)
+{
+	errno = ENOSYS;
+	return -1;
+}
+
+static int skel_openat(struct vfs_handle_struct *handle,
+		       const struct files_struct *dirfsp,
+		       const struct smb_filename *smb_fname,
+		       struct files_struct *fsp,
+		       const struct vfs_open_how *how)
+{
+	if (how->resolve != 0) {
+		errno = ENOSYS;
+		return -1;
+	}
+
+	errno = ENOSYS;
+	return -1;
+}
+
+static NTSTATUS skel_create_file(struct vfs_handle_struct *handle,
+				 struct smb_request *req,
+				 struct files_struct *dirfsp,
+				 struct smb_filename *smb_fname,
+				 uint32_t access_mask,
+				 uint32_t share_access,
+				 uint32_t create_disposition,
+				 uint32_t create_options,
+				 uint32_t file_attributes,
+				 uint32_t oplock_request,
+				 const struct smb2_lease *lease,
+				 uint64_t allocation_size,
+				 uint32_t private_flags,
+				 struct security_descriptor *sd,
+				 struct ea_list *ea_list,
+				 files_struct **result, int *pinfo,
+				 const struct smb2_create_blobs *in_context_blobs,
+				 struct smb2_create_blobs *out_context_blobs)
+{
+	return NT_STATUS_NOT_IMPLEMENTED;
+}
+
+static int skel_close_fn(vfs_handle_struct *handle, files_struct *fsp)
+{
+	errno = ENOSYS;
+	return -1;
+}
+
+static ssize_t skel_pread(vfs_handle_struct *handle, files_struct *fsp,
+			  void *data, size_t n, off_t offset)
+{
+	errno = ENOSYS;
+	return -1;
+}
+
+static struct tevent_req *skel_pread_send(struct vfs_handle_struct *handle,
+					  TALLOC_CTX *mem_ctx,
+					  struct tevent_context *ev,
+					  struct files_struct *fsp,
+					  void *data, size_t n, off_t offset)
+{
+	return NULL;
+}
+
+static ssize_t skel_pread_recv(struct tevent_req *req,
+			       struct vfs_aio_state *vfs_aio_state)
+{
+	vfs_aio_state->error = ENOSYS;
+	return -1;
+}
+
+static ssize_t skel_pwrite(vfs_handle_struct *handle, files_struct *fsp,
+			   const void *data, size_t n, off_t offset)
+{
+	errno = ENOSYS;
+	return -1;
+}
+
+static struct tevent_req *skel_pwrite_send(struct vfs_handle_struct *handle,
+					   TALLOC_CTX *mem_ctx,
+					   struct tevent_context *ev,
+					   struct files_struct *fsp,
+					   const void *data,
+					   size_t n, off_t offset)
+{
+	return NULL;
+}
+
+static ssize_t skel_pwrite_recv(struct tevent_req *req,
+				struct vfs_aio_state *vfs_aio_state)
+{
+	vfs_aio_state->error = ENOSYS;
+	return -1;
+}
+
+static off_t skel_lseek(vfs_handle_struct *handle, files_struct *fsp,
+			off_t offset, int whence)
+{
+	errno = ENOSYS;
+	return (off_t) - 1;
+}
+
+static ssize_t skel_sendfile(vfs_handle_struct *handle, int tofd,
+			     files_struct *fromfsp, const DATA_BLOB *hdr,
+			     off_t offset, size_t n)
+{
+	errno = ENOSYS;
+	return -1;
+}
+
+static ssize_t skel_recvfile(vfs_handle_struct *handle, int fromfd,
+			     files_struct *tofsp, off_t offset, size_t n)
+{
+	errno = ENOSYS;
+	return -1;
+}
+
+static int skel_renameat(vfs_handle_struct *handle,
+		       files_struct *srcfsp,
+		       const struct smb_filename *smb_fname_src,
+		       files_struct *dstfsp,
+		       const struct smb_filename *smb_fname_dst)
+{
+	errno = ENOSYS;
+	return -1;
+}
+
+static struct tevent_req *skel_fsync_send(struct vfs_handle_struct *handle,
+					  TALLOC_CTX *mem_ctx,
+					  struct tevent_context *ev,
+					  struct files_struct *fsp)
+{
+	return NULL;
+}
+
+static int skel_fsync_recv(struct tevent_req *req,
+			   struct vfs_aio_state *vfs_aio_state)
+{
+	vfs_aio_state->error = ENOSYS;
+	return -1;
+}
+
+static int skel_stat(vfs_handle_struct *handle, struct smb_filename *smb_fname)
+{
+	errno = ENOSYS;
+	return -1;
+}
+
+static int skel_fstat(vfs_handle_struct *handle, files_struct *fsp,
+		      SMB_STRUCT_STAT *sbuf)
+{
+	errno = ENOSYS;
+	return -1;
+}
+
+static int skel_lstat(vfs_handle_struct *handle,
+		      struct smb_filename *smb_fname)
+{
+	errno = ENOSYS;
+	return -1;
+}
+
+static int skel_fstatat(
+	struct vfs_handle_struct *handle,
+	const struct files_struct *dirfsp,
+	const struct smb_filename *smb_fname,
+	SMB_STRUCT_STAT *sbuf,
+	int flags)
+{
+	errno = ENOSYS;
+	return -1;
+}
+
+static uint64_t skel_get_alloc_size(struct vfs_handle_struct *handle,
+				    struct files_struct *fsp,
+				    const SMB_STRUCT_STAT *sbuf)
+{
+	errno = ENOSYS;
+	return -1;
+}
+
+static int skel_unlinkat(vfs_handle_struct *handle,
+			struct files_struct *dirfsp,
+			const struct smb_filename *smb_fname,
+			int flags)
+{
+	errno = ENOSYS;
+	return -1;
+}
+
+static int skel_fchmod(vfs_handle_struct *handle, files_struct *fsp,
+		       mode_t mode)
+{
+	errno = ENOSYS;
+	return -1;
+}
+
+static int skel_fchown(vfs_handle_struct *handle, files_struct *fsp,
+		       uid_t uid, gid_t gid)
+{
+	errno = ENOSYS;
+	return -1;
+}
+
+static int skel_lchown(vfs_handle_struct *handle,
+			const struct smb_filename *smb_fname,
+			uid_t uid,
+			gid_t gid)
+{
+	errno = ENOSYS;
+	return -1;
+}
+
+static int skel_chdir(vfs_handle_struct *handle,
+			const struct smb_filename *smb_fname)
+{
+	errno = ENOSYS;
+	return -1;
+}
+
+static struct smb_filename *skel_getwd(vfs_handle_struct *handle,
+				TALLOC_CTX *ctx)
+{
+	errno = ENOSYS;
+	return NULL;
+}
+
+static int skel_fntimes(vfs_handle_struct *handle,
+			files_struct *fsp,
+			struct smb_file_time *ft)
+{
+	errno = ENOSYS;
+	return -1;
+}
+
+static int skel_ftruncate(vfs_handle_struct *handle, files_struct *fsp,
+			  off_t offset)
+{
+	errno = ENOSYS;
+	return -1;
+}
+
+static int skel_fallocate(vfs_handle_struct *handle, files_struct *fsp,
+			  uint32_t mode, off_t offset, off_t len)
+{
+	errno = ENOSYS;
+	return -1;
+}
+
+static bool skel_lock(vfs_handle_struct *handle, files_struct *fsp, int op,
+		      off_t offset, off_t count, int type)
+{
+	errno = ENOSYS;
+	return false;
+}
+
+static int skel_filesystem_sharemode(struct vfs_handle_struct *handle,
+				     struct files_struct *fsp,
+				     uint32_t share_mode,
+				     uint32_t access_mask)
+{
+	errno = ENOSYS;
+	return -1;
+}
+
+static int skel_fcntl(struct vfs_handle_struct *handle,
+		      struct files_struct *fsp, int cmd, va_list cmd_arg)
+{
+	errno = ENOSYS;
+	return -1;
+}
+
+static int skel_linux_setlease(struct vfs_handle_struct *handle,
+			       struct files_struct *fsp, int leasetype)
+{
+	errno = ENOSYS;
+	return -1;
+}
+
+static bool skel_getlock(vfs_handle_struct *handle, files_struct *fsp,
+			 off_t *poffset, off_t *pcount, int *ptype,
+			 pid_t *ppid)
+{
+	errno = ENOSYS;
+	return false;
+}
+
+static int skel_symlinkat(vfs_handle_struct *handle,
+			const struct smb_filename *link_contents,
+			struct files_struct *dirfsp,
+			const struct smb_filename *new_smb_fname)
+{
+	errno = ENOSYS;
+	return -1;
+}
+
+static int skel_vfs_readlinkat(vfs_handle_struct *handle,
+			const struct files_struct *dirfsp,
+			const struct smb_filename *smb_fname,
+			char *buf,
+			size_t bufsiz)
+{
+	errno = ENOSYS;
+	return -1;
+}
+
+static int skel_linkat(vfs_handle_struct *handle,
+			files_struct *srcfsp,
+			const struct smb_filename *old_smb_fname,
+			files_struct *dstfsp,
+			const struct smb_filename *new_smb_fname,
+			int flags)
+{
+	errno = ENOSYS;
+	return -1;
+}
+
+static int skel_mknodat(vfs_handle_struct *handle,
+			files_struct *dirfsp,
+			const struct smb_filename *smb_fname,
+			mode_t mode,
+			SMB_DEV_T dev)
+{
+	errno = ENOSYS;
+	return -1;
+}
+
+static struct smb_filename *skel_realpath(vfs_handle_struct *handle,
+			TALLOC_CTX *ctx,
+			const struct smb_filename *smb_fname)
+{
+	errno = ENOSYS;
+	return NULL;
+}
+
+static int skel_fchflags(vfs_handle_struct *handle,
+			struct files_struct *fsp,
+			uint flags)
+{
+	errno = ENOSYS;
+	return -1;
+}
+
+static struct file_id skel_file_id_create(vfs_handle_struct *handle,
+					  const SMB_STRUCT_STAT *sbuf)
+{
+	struct file_id id;
+	ZERO_STRUCT(id);
+	errno = ENOSYS;
+	return id;
+}
+
+static uint64_t skel_fs_file_id(vfs_handle_struct *handle,
+				const SMB_STRUCT_STAT *sbuf)
+{
+	errno = ENOSYS;
+	return 0;
+}
+
+struct skel_offload_read_state {
+	bool dummy;
+};
+
+static struct tevent_req *skel_offload_read_send(
+	TALLOC_CTX *mem_ctx,
+	struct tevent_context *ev,
+	struct vfs_handle_struct *handle,
+	struct files_struct *fsp,
+	uint32_t fsctl,
+	uint32_t ttl,
+	off_t offset,
+	size_t to_copy)
+{
+	struct tevent_req *req = NULL;
+	struct skel_offload_read_state *state = NULL;
+
+	req = tevent_req_create(mem_ctx, &state, struct skel_offload_read_state);
+	if (req == NULL) {
+		return NULL;
+	}
+
+	tevent_req_nterror(req, NT_STATUS_NOT_IMPLEMENTED);
+	return tevent_req_post(req, ev);
+}
+
+static NTSTATUS skel_offload_read_recv(struct tevent_req *req,
+				       struct vfs_handle_struct *handle,
+				       TALLOC_CTX *mem_ctx,
+				       uint32_t *flags,
+				       uint64_t *xferlen,
+				       DATA_BLOB *_token_blob)
+{
+	NTSTATUS status;
+
+	if (tevent_req_is_nterror(req, &status)) {
+		tevent_req_received(req);
+		return status;
+	}
+	tevent_req_received(req);
+
+	return NT_STATUS_OK;
+}
+
+struct skel_cc_state {
+	uint64_t unused;
+};
+static struct tevent_req *skel_offload_write_send(struct vfs_handle_struct *handle,
+					       TALLOC_CTX *mem_ctx,
+					       struct tevent_context *ev,
+					       uint32_t fsctl,
+					       DATA_BLOB *token,
+					       off_t transfer_offset,
+					       struct files_struct *dest_fsp,
+					       off_t dest_off,
+					       off_t num)
+{
+	struct tevent_req *req;
+	struct skel_cc_state *cc_state;
+
+	req = tevent_req_create(mem_ctx, &cc_state, struct skel_cc_state);
+	if (req == NULL) {
+		return NULL;
+	}
+
+	tevent_req_nterror(req, NT_STATUS_NOT_IMPLEMENTED);
+	return tevent_req_post(req, ev);
+}
+
+static NTSTATUS skel_offload_write_recv(struct vfs_handle_struct *handle,
+				     struct tevent_req *req,
+				     off_t *copied)
+{
+	NTSTATUS status;
+
+	if (tevent_req_is_nterror(req, &status)) {
+		tevent_req_received(req);
+		return status;
+	}
+	tevent_req_received(req);
+
+	return NT_STATUS_OK;
+}
+
+static NTSTATUS skel_fget_compression(struct vfs_handle_struct *handle,
+				     TALLOC_CTX *mem_ctx,
+				     struct files_struct *fsp,
+				     uint16_t *_compression_fmt)
+{
+	return NT_STATUS_INVALID_DEVICE_REQUEST;
+}
+
+static NTSTATUS skel_set_compression(struct vfs_handle_struct *handle,
+				     TALLOC_CTX *mem_ctx,
+				     struct files_struct *fsp,
+				     uint16_t compression_fmt)
+{
+	return NT_STATUS_INVALID_DEVICE_REQUEST;
+}
+
+static NTSTATUS skel_fstreaminfo(struct vfs_handle_struct *handle,
+				 struct files_struct *fsp,
+				 TALLOC_CTX *mem_ctx,
+				 unsigned int *num_streams,
+				 struct stream_struct **streams)
+{
+	return NT_STATUS_NOT_IMPLEMENTED;
+}
+
+static NTSTATUS skel_get_real_filename_at(struct vfs_handle_struct *handle,
+					  struct files_struct *dirfsp,
+					  const char *name,
+					  TALLOC_CTX *mem_ctx,
+					  char **found_name)
+{
+	return NT_STATUS_NOT_IMPLEMENTED;
+}
+
+static const char *skel_connectpath(
+	struct vfs_handle_struct *handle,
+	const struct files_struct *dirfsp,
+	const struct smb_filename *smb_fname)
+{
+	errno = ENOSYS;
+	return NULL;
+}
+
+static NTSTATUS skel_brl_lock_windows(struct vfs_handle_struct *handle,
+				      struct byte_range_lock *br_lck,
+				      struct lock_struct *plock)
+{
+	return NT_STATUS_NOT_IMPLEMENTED;
+}
+
+static bool skel_brl_unlock_windows(struct vfs_handle_struct *handle,
+				    struct byte_range_lock *br_lck,
+				    const struct lock_struct *plock)
+{
+	errno = ENOSYS;
+	return false;
+}
+
+static bool skel_strict_lock_check(struct vfs_handle_struct *handle,
+				   struct files_struct *fsp,
+				   struct lock_struct *plock)
+{
+	errno = ENOSYS;
+	return false;
+}
+
+static NTSTATUS skel_translate_name(struct vfs_handle_struct *handle,
+				    const char *mapped_name,
+				    enum vfs_translate_direction direction,
+				    TALLOC_CTX *mem_ctx, char **pmapped_name)
+{
+	return NT_STATUS_NOT_IMPLEMENTED;
+}
+
+static NTSTATUS skel_parent_pathname(struct vfs_handle_struct *handle,
+				     TALLOC_CTX *mem_ctx,
+				     const struct smb_filename *smb_fname_in,
+				     struct smb_filename **parent_dir_out,
+				     struct smb_filename **atname_out)
+{
+	return NT_STATUS_NOT_IMPLEMENTED;
+}
+
+static NTSTATUS skel_fsctl(struct vfs_handle_struct *handle,
+			   struct files_struct *fsp,
+			   TALLOC_CTX *ctx,
+			   uint32_t function,
+			   uint16_t req_flags,	/* Needed for UNICODE ... */
+			   const uint8_t *_in_data,
+			   uint32_t in_len,
+			   uint8_t **_out_data,
+			   uint32_t max_out_len, uint32_t *out_len)
+{
+	return NT_STATUS_NOT_IMPLEMENTED;
+}
+
+static NTSTATUS skel_freaddir_attr(struct vfs_handle_struct *handle,
+				   struct files_struct *fsp,
+				   TALLOC_CTX *mem_ctx,
+				   struct readdir_attr_data **pattr_data)
+{
+	return NT_STATUS_NOT_IMPLEMENTED;
+}
+
+struct skel_get_dos_attributes_state {
+	struct vfs_aio_state aio_state;
+	uint32_t dosmode;
+};
+
+static struct tevent_req *skel_get_dos_attributes_send(
+			TALLOC_CTX *mem_ctx,
+			struct tevent_context *ev,
+			struct vfs_handle_struct *handle,
+			files_struct *dir_fsp,
+			struct smb_filename *smb_fname)
+{
+	struct tevent_req *req = NULL;
+	struct skel_get_dos_attributes_state *state = NULL;
+
+	req = tevent_req_create(mem_ctx, &state,
+				struct skel_get_dos_attributes_state);
+	if (req == NULL) {
+		return NULL;
+	}
+
+	tevent_req_nterror(req, NT_STATUS_NOT_IMPLEMENTED);
+	return tevent_req_post(req, ev);
+}
+
+static NTSTATUS skel_get_dos_attributes_recv(struct tevent_req *req,
+					     struct vfs_aio_state *aio_state,
+					     uint32_t *dosmode)
+{
+	struct skel_get_dos_attributes_state *state =
+		tevent_req_data(req,
+		struct skel_get_dos_attributes_state);
+	NTSTATUS status;
+
+	if (tevent_req_is_nterror(req, &status)) {
+		tevent_req_received(req);
+		return status;
+	}
+
+	*aio_state = state->aio_state;
+	*dosmode = state->dosmode;
+	tevent_req_received(req);
+	return NT_STATUS_OK;
+}
+
+static NTSTATUS skel_fget_dos_attributes(struct vfs_handle_struct *handle,
+				struct files_struct *fsp,
+				uint32_t *dosmode)
+{
+	return NT_STATUS_NOT_IMPLEMENTED;
+}
+
+static NTSTATUS skel_fset_dos_attributes(struct vfs_handle_struct *handle,
+				struct files_struct *fsp,
+				uint32_t dosmode)
+{
+	return NT_STATUS_NOT_IMPLEMENTED;
+}
+
+static NTSTATUS skel_fget_nt_acl(vfs_handle_struct *handle, files_struct *fsp,
+				 uint32_t security_info,
+				 TALLOC_CTX *mem_ctx,
+				 struct security_descriptor **ppdesc)
+{
+	return NT_STATUS_NOT_IMPLEMENTED;
+}
+
+static NTSTATUS skel_fset_nt_acl(vfs_handle_struct *handle, files_struct *fsp,
+				 uint32_t security_info_sent,
+				 const struct security_descriptor *psd)
+{
+	return NT_STATUS_NOT_IMPLEMENTED;
+}
+
+static SMB_ACL_T skel_sys_acl_get_fd(vfs_handle_struct *handle,
+				     files_struct *fsp,
+				     SMB_ACL_TYPE_T type,
+				     TALLOC_CTX *mem_ctx)
+{
+	errno = ENOSYS;
+	return (SMB_ACL_T) NULL;
+}
+
+static int skel_sys_acl_blob_get_fd(vfs_handle_struct *handle,
+				    files_struct *fsp, TALLOC_CTX *mem_ctx,
+				    char **blob_description, DATA_BLOB *blob)
+{
+	errno = ENOSYS;
+	return -1;
+}
+
+static int skel_sys_acl_set_fd(vfs_handle_struct *handle,
+			       struct files_struct *fsp,
+			       SMB_ACL_TYPE_T type,
+			       SMB_ACL_T theacl)
+{
+	errno = ENOSYS;
+	return -1;
+}
+
+static int skel_sys_acl_delete_def_fd(vfs_handle_struct *handle,
+					struct files_struct *fsp)
+{
+	errno = ENOSYS;
+	return -1;
+}
+
+struct skel_getxattrat_state {
+	struct vfs_aio_state aio_state;
+	ssize_t xattr_size;
+	uint8_t *xattr_value;
+};
+
+static struct tevent_req *skel_getxattrat_send(
+			TALLOC_CTX *mem_ctx,
+			struct tevent_context *ev,
+			struct vfs_handle_struct *handle,
+			files_struct *dir_fsp,
+			const struct smb_filename *smb_fname,
+			const char *xattr_name,
+			size_t alloc_hint)
+{
+	struct tevent_req *req = NULL;
+	struct skel_getxattrat_state *state = NULL;
+
+	req = tevent_req_create(mem_ctx, &state,
+				struct skel_getxattrat_state);
+	if (req == NULL) {
+		return NULL;
+	}
+
+	tevent_req_error(req, ENOSYS);
+	return tevent_req_post(req, ev);
+}
+
+static ssize_t skel_getxattrat_recv(struct tevent_req *req,
+				    struct vfs_aio_state *aio_state,
+				    TALLOC_CTX *mem_ctx,
+				    uint8_t **xattr_value)
+{
+	struct skel_getxattrat_state *state = tevent_req_data(
+		req, struct skel_getxattrat_state);
+	ssize_t xattr_size;
+
+	if (tevent_req_is_unix_error(req, &aio_state->error)) {
+		tevent_req_received(req);
+		return -1;
+	}
+
+	*aio_state = state->aio_state;
+	xattr_size = state->xattr_size;
+	if (xattr_value != NULL) {
+		*xattr_value = talloc_move(mem_ctx, &state->xattr_value);
+	}
+
+	tevent_req_received(req);
+	return xattr_size;
+}
+
+static ssize_t skel_fgetxattr(vfs_handle_struct *handle,
+			      struct files_struct *fsp, const char *name,
+			      void *value, size_t size)
+{
+	errno = ENOSYS;
+	return -1;
+}
+
+static ssize_t skel_flistxattr(vfs_handle_struct *handle,
+			       struct files_struct *fsp, char *list,
+			       size_t size)
+{
+	errno = ENOSYS;
+	return -1;
+}
+
+static int skel_fremovexattr(vfs_handle_struct *handle,
+			     struct files_struct *fsp, const char *name)
+{
+	errno = ENOSYS;
+	return -1;
+}
+
+static int skel_fsetxattr(vfs_handle_struct *handle, struct files_struct *fsp,
+			  const char *name, const void *value, size_t size,
+			  int flags)
+{
+	errno = ENOSYS;
+	return -1;
+}
+
+static bool skel_aio_force(struct vfs_handle_struct *handle,
+			   struct files_struct *fsp)
+{
+	errno = ENOSYS;
+	return false;
+}
+
+static NTSTATUS skel_audit_file(struct vfs_handle_struct *handle,
+				struct smb_filename *file,
+				struct security_acl *sacl,
+				uint32_t access_requested,
+				uint32_t access_denied)
+{
+	return NT_STATUS_NOT_IMPLEMENTED;
+}
+
+static NTSTATUS skel_durable_cookie(struct vfs_handle_struct *handle,
+				    struct files_struct *fsp,
+				    TALLOC_CTX *mem_ctx,
+				    DATA_BLOB *cookie)
+{
+	return NT_STATUS_NOT_IMPLEMENTED;
+}
+
+static NTSTATUS skel_durable_disconnect(struct vfs_handle_struct *handle,
+					struct files_struct *fsp,
+					const DATA_BLOB old_cookie,
+					TALLOC_CTX *mem_ctx,
+					DATA_BLOB *new_cookie)
+{
+	return NT_STATUS_NOT_IMPLEMENTED;
+}
+
+static NTSTATUS skel_durable_reconnect(struct vfs_handle_struct *handle,
+				       struct smb_request *smb1req,
+				       struct smbXsrv_open *op,
+				       const DATA_BLOB old_cookie,
+				       TALLOC_CTX *mem_ctx,
+				       struct files_struct **fsp,
+				       DATA_BLOB *new_cookie)
+{
+	return NT_STATUS_NOT_IMPLEMENTED;
+}
+
+/* VFS operations structure */
+
+static struct vfs_fn_pointers skel_opaque_fns = {
+	/* Disk operations */
+
+	.connect_fn = skel_connect,
+	.disconnect_fn = skel_disconnect,
+	.disk_free_fn = skel_disk_free,
+	.get_quota_fn = skel_get_quota,
+	.set_quota_fn = skel_set_quota,
+	.get_shadow_copy_data_fn = skel_get_shadow_copy_data,
+	.statvfs_fn = skel_statvfs,
+	.fs_capabilities_fn = skel_fs_capabilities,
+	.get_dfs_referrals_fn = skel_get_dfs_referrals,
+	.create_dfs_pathat_fn = skel_create_dfs_pathat,
+	.read_dfs_pathat_fn = skel_read_dfs_pathat,
+	.snap_check_path_fn = skel_snap_check_path,
+	.snap_create_fn = skel_snap_create,
+	.snap_delete_fn = skel_snap_delete,
+
+	/* Directory operations */
+
+	.fdopendir_fn = skel_fdopendir,
+	.readdir_fn = skel_readdir,
+	.rewind_dir_fn = skel_rewind_dir,
+	.mkdirat_fn = skel_mkdirat,
+	.closedir_fn = skel_closedir,
+
+	/* File operations */
+
+	.openat_fn = skel_openat,
+	.create_file_fn = skel_create_file,
+	.close_fn = skel_close_fn,
+	.pread_fn = skel_pread,
+	.pread_send_fn = skel_pread_send,
+	.pread_recv_fn = skel_pread_recv,
+	.pwrite_fn = skel_pwrite,
+	.pwrite_send_fn = skel_pwrite_send,
+	.pwrite_recv_fn = skel_pwrite_recv,
+	.lseek_fn = skel_lseek,
+	.sendfile_fn = skel_sendfile,
+	.recvfile_fn = skel_recvfile,
+	.renameat_fn = skel_renameat,
+	.fsync_send_fn = skel_fsync_send,
+	.fsync_recv_fn = skel_fsync_recv,
+	.stat_fn = skel_stat,
+	.fstat_fn = skel_fstat,
+	.lstat_fn = skel_lstat,
+	.fstatat_fn = skel_fstatat,
+	.get_alloc_size_fn = skel_get_alloc_size,
+	.unlinkat_fn = skel_unlinkat,
+	.fchmod_fn = skel_fchmod,
+	.fchown_fn = skel_fchown,
+	.lchown_fn = skel_lchown,
+	.chdir_fn = skel_chdir,
+	.getwd_fn = skel_getwd,
+	.fntimes_fn = skel_fntimes,
+	.ftruncate_fn = skel_ftruncate,
+	.fallocate_fn = skel_fallocate,
+	.lock_fn = skel_lock,
+	.filesystem_sharemode_fn = skel_filesystem_sharemode,
+	.fcntl_fn = skel_fcntl,
+	.linux_setlease_fn = skel_linux_setlease,
+	.getlock_fn = skel_getlock,
+	.symlinkat_fn = skel_symlinkat,
+	.readlinkat_fn = skel_vfs_readlinkat,
+	.linkat_fn = skel_linkat,
+	.mknodat_fn = skel_mknodat,
+	.realpath_fn = skel_realpath,
+	.fchflags_fn = skel_fchflags,
+	.file_id_create_fn = skel_file_id_create,
+	.fs_file_id_fn = skel_fs_file_id,
+	.offload_read_send_fn = skel_offload_read_send,
+	.offload_read_recv_fn = skel_offload_read_recv,
+	.offload_write_send_fn = skel_offload_write_send,
+	.offload_write_recv_fn = skel_offload_write_recv,
+	.fget_compression_fn = skel_fget_compression,
+	.set_compression_fn = skel_set_compression,
+
+	.fstreaminfo_fn = skel_fstreaminfo,
+	.get_real_filename_at_fn = skel_get_real_filename_at,
+	.connectpath_fn = skel_connectpath,
+	.brl_lock_windows_fn = skel_brl_lock_windows,
+	.brl_unlock_windows_fn = skel_brl_unlock_windows,
+	.strict_lock_check_fn = skel_strict_lock_check,
+	.translate_name_fn = skel_translate_name,
+	.parent_pathname_fn = skel_parent_pathname,
+	.fsctl_fn = skel_fsctl,
+	.freaddir_attr_fn = skel_freaddir_attr,
+	.audit_file_fn = skel_audit_file,
+
+	/* DOS attributes. */
+	.get_dos_attributes_send_fn = skel_get_dos_attributes_send,
+	.get_dos_attributes_recv_fn = skel_get_dos_attributes_recv,
+	.fget_dos_attributes_fn = skel_fget_dos_attributes,
+	.fset_dos_attributes_fn = skel_fset_dos_attributes,
+
+	/* NT ACL operations. */
+
+	.fget_nt_acl_fn = skel_fget_nt_acl,
+	.fset_nt_acl_fn = skel_fset_nt_acl,
+
+	/* POSIX ACL operations. */
+
+	.sys_acl_get_fd_fn = skel_sys_acl_get_fd,
+	.sys_acl_blob_get_fd_fn = skel_sys_acl_blob_get_fd,
+	.sys_acl_set_fd_fn = skel_sys_acl_set_fd,
+	.sys_acl_delete_def_fd_fn = skel_sys_acl_delete_def_fd,
+
+	/* EA operations. */
+	.getxattrat_send_fn = skel_getxattrat_send,
+	.getxattrat_recv_fn = skel_getxattrat_recv,
+	.fgetxattr_fn = skel_fgetxattr,
+	.flistxattr_fn = skel_flistxattr,
+	.fremovexattr_fn = skel_fremovexattr,
+	.fsetxattr_fn = skel_fsetxattr,
+
+	/* aio operations */
+	.aio_force_fn = skel_aio_force,
+
+	/* durable handle operations */
+	.durable_cookie_fn = skel_durable_cookie,
+	.durable_disconnect_fn = skel_durable_disconnect,
+	.durable_reconnect_fn = skel_durable_reconnect,
+};
+
+static_decl_vfs;
+NTSTATUS vfs_skel_opaque_init(TALLOC_CTX *ctx)
+{
+	/*
+	 * smb_vfs_assert_all_fns() makes sure every
+	 * call is implemented.
+	 *
+	 * An opaque module requires this!
+	 */
+	smb_vfs_assert_all_fns(&skel_opaque_fns, "skel_opaque");
+	return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "skel_opaque",
+				&skel_opaque_fns);
+}
diff --git a/examples/VFS/skel_transparent.c b/examples/VFS/skel_transparent.c
new file mode 100644
index 0000000..461228f
--- /dev/null
+++ b/examples/VFS/skel_transparent.c
@@ -0,0 +1,1410 @@
+/* 
+ * Skeleton VFS module.  Implements passthrough operation of all VFS
+ * calls to disk functions.
+ *
+ * Copyright (C) Tim Potter, 1999-2000
+ * Copyright (C) Alexander Bokovoy, 2002
+ * Copyright (C) Stefan (metze) Metzmacher, 2003
+ * Copyright (C) Jeremy Allison 2009
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *  
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *  
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "../source3/include/includes.h"
+#include "lib/util/tevent_unix.h"
+#include "lib/util/tevent_ntstatus.h"
+
+/* PLEASE,PLEASE READ THE VFS MODULES CHAPTER OF THE 
+   SAMBA DEVELOPERS GUIDE!!!!!!
+ */
+
+/* If you take this file as template for your module
+ * please make sure that you remove all skel_XXX() functions you don't
+ * want to implement!! The passthrough operations are not
+ * necessary in a real module.
+ *
+ * --metze
+ */
+
+static int skel_connect(vfs_handle_struct *handle, const char *service,
+			const char *user)
+{
+	return SMB_VFS_NEXT_CONNECT(handle, service, user);
+}
+
+static void skel_disconnect(vfs_handle_struct *handle)
+{
+	SMB_VFS_NEXT_DISCONNECT(handle);
+}
+
+static uint64_t skel_disk_free(vfs_handle_struct *handle,
+				const struct smb_filename *smb_fname,
+				uint64_t *bsize,
+				uint64_t *dfree,
+				uint64_t *dsize)
+{
+	return SMB_VFS_NEXT_DISK_FREE(handle, smb_fname, bsize, dfree, dsize);
+}
+
+static int skel_get_quota(vfs_handle_struct *handle,
+				const struct smb_filename *smb_fname,
+				enum SMB_QUOTA_TYPE qtype,
+				unid_t id,
+				SMB_DISK_QUOTA *dq)
+{
+	return SMB_VFS_NEXT_GET_QUOTA(handle, smb_fname, qtype, id, dq);
+}
+
+static int skel_set_quota(vfs_handle_struct *handle, enum SMB_QUOTA_TYPE qtype,
+			  unid_t id, SMB_DISK_QUOTA *dq)
+{
+	return SMB_VFS_NEXT_SET_QUOTA(handle, qtype, id, dq);
+}
+
+static int skel_get_shadow_copy_data(vfs_handle_struct *handle,
+				     files_struct *fsp,
+				     struct shadow_copy_data *shadow_copy_data,
+				     bool labels)
+{
+	return SMB_VFS_NEXT_GET_SHADOW_COPY_DATA(handle, fsp, shadow_copy_data,
+						 labels);
+}
+
+static int skel_statvfs(struct vfs_handle_struct *handle,
+			const struct smb_filename *smb_fname,
+			struct vfs_statvfs_struct *statbuf)
+{
+	return SMB_VFS_NEXT_STATVFS(handle, smb_fname, statbuf);
+}
+
+static uint32_t skel_fs_capabilities(struct vfs_handle_struct *handle,
+				     enum timestamp_set_resolution *p_ts_res)
+{
+	return SMB_VFS_NEXT_FS_CAPABILITIES(handle, p_ts_res);
+}
+
+static NTSTATUS skel_get_dfs_referrals(struct vfs_handle_struct *handle,
+				       struct dfs_GetDFSReferral *r)
+{
+	return SMB_VFS_NEXT_GET_DFS_REFERRALS(handle, r);
+}
+
+static NTSTATUS skel_create_dfs_pathat(struct vfs_handle_struct *handle,
+				struct files_struct *dirfsp,
+				const struct smb_filename *smb_fname,
+				const struct referral *reflist,
+				size_t referral_count)
+{
+	return SMB_VFS_NEXT_CREATE_DFS_PATHAT(handle,
+					dirfsp,
+					smb_fname,
+					reflist,
+					referral_count);
+}
+
+static NTSTATUS skel_read_dfs_pathat(struct vfs_handle_struct *handle,
+				TALLOC_CTX *mem_ctx,
+				struct files_struct *dirfsp,
+				struct smb_filename *smb_fname,
+				struct referral **ppreflist,
+				size_t *preferral_count)
+{
+	return SMB_VFS_NEXT_READ_DFS_PATHAT(handle,
+					mem_ctx,
+					dirfsp,
+					smb_fname,
+					ppreflist,
+					preferral_count);
+}
+
+static NTSTATUS skel_snap_check_path(struct vfs_handle_struct *handle,
+				     TALLOC_CTX *mem_ctx,
+				     const char *service_path,
+				     char **base_volume)
+{
+	return SMB_VFS_NEXT_SNAP_CHECK_PATH(handle, mem_ctx, service_path,
+					    base_volume);
+}
+
+static NTSTATUS skel_snap_create(struct vfs_handle_struct *handle,
+				 TALLOC_CTX *mem_ctx,
+				 const char *base_volume,
+				 time_t *tstamp,
+				 bool rw,
+				 char **base_path,
+				 char **snap_path)
+{
+	return SMB_VFS_NEXT_SNAP_CREATE(handle, mem_ctx, base_volume, tstamp,
+					rw, base_path, snap_path);
+}
+
+static NTSTATUS skel_snap_delete(struct vfs_handle_struct *handle,
+				 TALLOC_CTX *mem_ctx,
+				 char *base_path,
+				 char *snap_path)
+{
+	return SMB_VFS_NEXT_SNAP_DELETE(handle, mem_ctx, base_path, snap_path);
+}
+
+static DIR *skel_fdopendir(vfs_handle_struct *handle, files_struct *fsp,
+			   const char *mask, uint32_t attr)
+{
+	return SMB_VFS_NEXT_FDOPENDIR(handle, fsp, mask, attr);
+}
+
+static struct dirent *
+skel_readdir(vfs_handle_struct *handle, struct files_struct *dirfsp, DIR *dirp)
+{
+	return SMB_VFS_NEXT_READDIR(handle, dirfsp, dirp);
+}
+
+static void skel_rewind_dir(vfs_handle_struct *handle, DIR *dirp)
+{
+	SMB_VFS_NEXT_REWINDDIR(handle, dirp);
+}
+
+static int skel_mkdirat(vfs_handle_struct *handle,
+		struct files_struct *dirfsp,
+		const struct smb_filename *smb_fname,
+		mode_t mode)
+{
+	return SMB_VFS_NEXT_MKDIRAT(handle,
+			dirfsp,
+			smb_fname,
+			mode);
+}
+
+static int skel_closedir(vfs_handle_struct *handle, DIR *dir)
+{
+	return SMB_VFS_NEXT_CLOSEDIR(handle, dir);
+}
+
+static int skel_openat(struct vfs_handle_struct *handle,
+		       const struct files_struct *dirfsp,
+		       const struct smb_filename *smb_fname,
+		       struct files_struct *fsp,
+		       const struct vfs_open_how *how)
+{
+	return SMB_VFS_NEXT_OPENAT(handle, dirfsp, smb_fname, fsp, how);
+}
+
+static NTSTATUS skel_create_file(struct vfs_handle_struct *handle,
+				 struct smb_request *req,
+				 struct files_struct *dirfsp,
+				 struct smb_filename *smb_fname,
+				 uint32_t access_mask,
+				 uint32_t share_access,
+				 uint32_t create_disposition,
+				 uint32_t create_options,
+				 uint32_t file_attributes,
+				 uint32_t oplock_request,
+				 const struct smb2_lease *lease,
+				 uint64_t allocation_size,
+				 uint32_t private_flags,
+				 struct security_descriptor *sd,
+				 struct ea_list *ea_list,
+				 files_struct ** result, int *pinfo,
+				 const struct smb2_create_blobs *in_context_blobs,
+				 struct smb2_create_blobs *out_context_blobs)
+{
+	return SMB_VFS_NEXT_CREATE_FILE(handle,
+					req,
+					dirfsp,
+					smb_fname,
+					access_mask,
+					share_access,
+					create_disposition,
+					create_options,
+					file_attributes,
+					oplock_request,
+					lease,
+					allocation_size,
+					private_flags,
+					sd, ea_list, result, pinfo,
+					in_context_blobs, out_context_blobs);
+}
+
+static int skel_close_fn(vfs_handle_struct *handle, files_struct *fsp)
+{
+	return SMB_VFS_NEXT_CLOSE(handle, fsp);
+}
+
+static ssize_t skel_pread(vfs_handle_struct *handle, files_struct *fsp,
+			  void *data, size_t n, off_t offset)
+{
+	return SMB_VFS_NEXT_PREAD(handle, fsp, data, n, offset);
+}
+
+struct skel_pread_state {
+	ssize_t ret;
+	struct vfs_aio_state vfs_aio_state;
+};
+
+static void skel_pread_done(struct tevent_req *subreq);
+
+static struct tevent_req *skel_pread_send(struct vfs_handle_struct *handle,
+					  TALLOC_CTX *mem_ctx,
+					  struct tevent_context *ev,
+					  struct files_struct *fsp,
+					  void *data, size_t n, off_t offset)
+{
+	struct tevent_req *req, *subreq;
+	struct skel_pread_state *state;
+
+	req = tevent_req_create(mem_ctx, &state, struct skel_pread_state);
+	if (req == NULL) {
+		return NULL;
+	}
+	subreq = SMB_VFS_NEXT_PREAD_SEND(state, ev, handle, fsp, data,
+					 n, offset);
+	if (tevent_req_nomem(subreq, req)) {
+		return tevent_req_post(req, ev);
+	}
+	tevent_req_set_callback(subreq, skel_pread_done, req);
+	return req;
+}
+
+static void skel_pread_done(struct tevent_req *subreq)
+{
+	struct tevent_req *req =
+	    tevent_req_callback_data(subreq, struct tevent_req);
+	struct skel_pread_state *state =
+	    tevent_req_data(req, struct skel_pread_state);
+
+	state->ret = SMB_VFS_PREAD_RECV(subreq, &state->vfs_aio_state);
+	TALLOC_FREE(subreq);
+	tevent_req_done(req);
+}
+
+static ssize_t skel_pread_recv(struct tevent_req *req,
+			       struct vfs_aio_state *vfs_aio_state)
+{
+	struct skel_pread_state *state =
+	    tevent_req_data(req, struct skel_pread_state);
+
+	if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
+		return -1;
+	}
+	*vfs_aio_state = state->vfs_aio_state;
+	return state->ret;
+}
+
+static ssize_t skel_pwrite(vfs_handle_struct *handle, files_struct *fsp,
+			   const void *data, size_t n, off_t offset)
+{
+	return SMB_VFS_NEXT_PWRITE(handle, fsp, data, n, offset);
+}
+
+struct skel_pwrite_state {
+	ssize_t ret;
+	struct vfs_aio_state vfs_aio_state;
+};
+
+static void skel_pwrite_done(struct tevent_req *subreq);
+
+static struct tevent_req *skel_pwrite_send(struct vfs_handle_struct *handle,
+					   TALLOC_CTX *mem_ctx,
+					   struct tevent_context *ev,
+					   struct files_struct *fsp,
+					   const void *data,
+					   size_t n, off_t offset)
+{
+	struct tevent_req *req, *subreq;
+	struct skel_pwrite_state *state;
+
+	req = tevent_req_create(mem_ctx, &state, struct skel_pwrite_state);
+	if (req == NULL) {
+		return NULL;
+	}
+	subreq = SMB_VFS_NEXT_PWRITE_SEND(state, ev, handle, fsp, data,
+					  n, offset);
+	if (tevent_req_nomem(subreq, req)) {
+		return tevent_req_post(req, ev);
+	}
+	tevent_req_set_callback(subreq, skel_pwrite_done, req);
+	return req;
+}
+
+static void skel_pwrite_done(struct tevent_req *subreq)
+{
+	struct tevent_req *req =
+	    tevent_req_callback_data(subreq, struct tevent_req);
+	struct skel_pwrite_state *state =
+	    tevent_req_data(req, struct skel_pwrite_state);
+
+	state->ret = SMB_VFS_PWRITE_RECV(subreq, &state->vfs_aio_state);
+	TALLOC_FREE(subreq);
+	tevent_req_done(req);
+}
+
+static ssize_t skel_pwrite_recv(struct tevent_req *req,
+				struct vfs_aio_state *vfs_aio_state)
+{
+	struct skel_pwrite_state *state =
+	    tevent_req_data(req, struct skel_pwrite_state);
+
+	if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
+		return -1;
+	}
+	*vfs_aio_state = state->vfs_aio_state;
+	return state->ret;
+}
+
+static off_t skel_lseek(vfs_handle_struct *handle, files_struct *fsp,
+			off_t offset, int whence)
+{
+	return SMB_VFS_NEXT_LSEEK(handle, fsp, offset, whence);
+}
+
+static ssize_t skel_sendfile(vfs_handle_struct *handle, int tofd,
+			     files_struct *fromfsp, const DATA_BLOB *hdr,
+			     off_t offset, size_t n)
+{
+	return SMB_VFS_NEXT_SENDFILE(handle, tofd, fromfsp, hdr, offset, n);
+}
+
+static ssize_t skel_recvfile(vfs_handle_struct *handle, int fromfd,
+			     files_struct *tofsp, off_t offset, size_t n)
+{
+	return SMB_VFS_NEXT_RECVFILE(handle, fromfd, tofsp, offset, n);
+}
+
+static int skel_renameat(vfs_handle_struct *handle,
+		       files_struct *srcfsp,
+		       const struct smb_filename *smb_fname_src,
+		       files_struct *dstfsp,
+		       const struct smb_filename *smb_fname_dst)
+{
+	return SMB_VFS_NEXT_RENAMEAT(handle,
+			srcfsp,
+			smb_fname_src,
+			dstfsp,
+			smb_fname_dst);
+}
+
+struct skel_fsync_state {
+	int ret;
+	struct vfs_aio_state vfs_aio_state;
+};
+
+static void skel_fsync_done(struct tevent_req *subreq);
+
+static struct tevent_req *skel_fsync_send(struct vfs_handle_struct *handle,
+					  TALLOC_CTX *mem_ctx,
+					  struct tevent_context *ev,
+					  struct files_struct *fsp)
+{
+	struct tevent_req *req, *subreq;
+	struct skel_fsync_state *state;
+
+	req = tevent_req_create(mem_ctx, &state, struct skel_fsync_state);
+	if (req == NULL) {
+		return NULL;
+	}
+	subreq = SMB_VFS_NEXT_FSYNC_SEND(state, ev, handle, fsp);
+	if (tevent_req_nomem(subreq, req)) {
+		return tevent_req_post(req, ev);
+	}
+	tevent_req_set_callback(subreq, skel_fsync_done, req);
+	return req;
+}
+
+static void skel_fsync_done(struct tevent_req *subreq)
+{
+	struct tevent_req *req =
+	    tevent_req_callback_data(subreq, struct tevent_req);
+	struct skel_fsync_state *state =
+	    tevent_req_data(req, struct skel_fsync_state);
+
+	state->ret = SMB_VFS_FSYNC_RECV(subreq, &state->vfs_aio_state);
+	TALLOC_FREE(subreq);
+	tevent_req_done(req);
+}
+
+static int skel_fsync_recv(struct tevent_req *req,
+			   struct vfs_aio_state *vfs_aio_state)
+{
+	struct skel_fsync_state *state =
+	    tevent_req_data(req, struct skel_fsync_state);
+
+	if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
+		return -1;
+	}
+	*vfs_aio_state = state->vfs_aio_state;
+	return state->ret;
+}
+
+static int skel_stat(vfs_handle_struct *handle, struct smb_filename *smb_fname)
+{
+	return SMB_VFS_NEXT_STAT(handle, smb_fname);
+}
+
+static int skel_fstat(vfs_handle_struct *handle, files_struct *fsp,
+		      SMB_STRUCT_STAT *sbuf)
+{
+	return SMB_VFS_NEXT_FSTAT(handle, fsp, sbuf);
+}
+
+static int skel_lstat(vfs_handle_struct *handle,
+		      struct smb_filename *smb_fname)
+{
+	return SMB_VFS_NEXT_LSTAT(handle, smb_fname);
+}
+
+static int skel_fstatat(
+	struct vfs_handle_struct *handle,
+	const struct files_struct *dirfsp,
+	const struct smb_filename *smb_fname,
+	SMB_STRUCT_STAT *sbuf,
+	int flags)
+{
+	return SMB_VFS_NEXT_FSTATAT(handle, dirfsp, smb_fname, sbuf, flags);
+}
+
+static uint64_t skel_get_alloc_size(struct vfs_handle_struct *handle,
+				    struct files_struct *fsp,
+				    const SMB_STRUCT_STAT *sbuf)
+{
+	return SMB_VFS_NEXT_GET_ALLOC_SIZE(handle, fsp, sbuf);
+}
+
+static int skel_unlinkat(vfs_handle_struct *handle,
+			struct files_struct *dirfsp,
+			const struct smb_filename *smb_fname,
+			int flags)
+{
+	return SMB_VFS_NEXT_UNLINKAT(handle,
+			dirfsp,
+			smb_fname,
+			flags);
+}
+
+static int skel_fchmod(vfs_handle_struct *handle, files_struct *fsp,
+		       mode_t mode)
+{
+	return SMB_VFS_NEXT_FCHMOD(handle, fsp, mode);
+}
+
+static int skel_fchown(vfs_handle_struct *handle, files_struct *fsp,
+		       uid_t uid, gid_t gid)
+{
+	return SMB_VFS_NEXT_FCHOWN(handle, fsp, uid, gid);
+}
+
+static int skel_lchown(vfs_handle_struct *handle,
+			const struct smb_filename *smb_fname,
+			uid_t uid,
+			gid_t gid)
+{
+	return SMB_VFS_NEXT_LCHOWN(handle, smb_fname, uid, gid);
+}
+
+static int skel_chdir(vfs_handle_struct *handle,
+			const struct smb_filename *smb_fname)
+{
+	return SMB_VFS_NEXT_CHDIR(handle, smb_fname);
+}
+
+static struct smb_filename *skel_getwd(vfs_handle_struct *handle,
+					TALLOC_CTX *ctx)
+{
+	return SMB_VFS_NEXT_GETWD(handle, ctx);
+}
+
+static int skel_fntimes(vfs_handle_struct *handle,
+			files_struct *fsp,
+			struct smb_file_time *ft)
+{
+	return SMB_VFS_NEXT_FNTIMES(handle, fsp, ft);
+}
+
+static int skel_ftruncate(vfs_handle_struct *handle, files_struct *fsp,
+			  off_t offset)
+{
+	return SMB_VFS_NEXT_FTRUNCATE(handle, fsp, offset);
+}
+
+static int skel_fallocate(vfs_handle_struct *handle, files_struct *fsp,
+			  uint32_t mode, off_t offset, off_t len)
+{
+	return SMB_VFS_NEXT_FALLOCATE(handle, fsp, mode, offset, len);
+}
+
+static bool skel_lock(vfs_handle_struct *handle, files_struct *fsp, int op,
+		      off_t offset, off_t count, int type)
+{
+	return SMB_VFS_NEXT_LOCK(handle, fsp, op, offset, count, type);
+}
+
+static int skel_filesystem_sharemode(struct vfs_handle_struct *handle,
+				     struct files_struct *fsp,
+				     uint32_t share_mode,
+				     uint32_t access_mask)
+{
+	return SMB_VFS_NEXT_FILESYSTEM_SHAREMODE(handle,
+						 fsp,
+						 share_mode,
+						 access_mask);
+}
+
+static int skel_fcntl(struct vfs_handle_struct *handle,
+		      struct files_struct *fsp, int cmd, va_list cmd_arg)
+{
+	void *arg;
+	va_list dup_cmd_arg;
+	int result;
+
+	va_copy(dup_cmd_arg, cmd_arg);
+	arg = va_arg(dup_cmd_arg, void *);
+	result = SMB_VFS_NEXT_FCNTL(handle, fsp, cmd, arg);
+	va_end(dup_cmd_arg);
+
+	return result;
+}
+
+static int skel_linux_setlease(struct vfs_handle_struct *handle,
+			       struct files_struct *fsp, int leasetype)
+{
+	return SMB_VFS_NEXT_LINUX_SETLEASE(handle, fsp, leasetype);
+}
+
+static bool skel_getlock(vfs_handle_struct *handle, files_struct *fsp,
+			 off_t *poffset, off_t *pcount, int *ptype,
+			 pid_t *ppid)
+{
+	return SMB_VFS_NEXT_GETLOCK(handle, fsp, poffset, pcount, ptype, ppid);
+}
+
+static int skel_symlinkat(vfs_handle_struct *handle,
+			const struct smb_filename *link_contents,
+			struct files_struct *dirfsp,
+			const struct smb_filename *new_smb_fname)
+{
+	return SMB_VFS_NEXT_SYMLINKAT(handle,
+				link_contents,
+				dirfsp,
+				new_smb_fname);
+}
+
+static int skel_vfs_readlinkat(vfs_handle_struct *handle,
+			const struct files_struct *dirfsp,
+			const struct smb_filename *smb_fname,
+			char *buf,
+			size_t bufsiz)
+{
+	return SMB_VFS_NEXT_READLINKAT(handle,
+			dirfsp,
+			smb_fname,
+			buf,
+			bufsiz);
+}
+
+static int skel_linkat(vfs_handle_struct *handle,
+			files_struct *srcfsp,
+			const struct smb_filename *old_smb_fname,
+			files_struct *dstfsp,
+			const struct smb_filename *new_smb_fname,
+			int flags)
+{
+	return SMB_VFS_NEXT_LINKAT(handle,
+			srcfsp,
+			old_smb_fname,
+			dstfsp,
+			new_smb_fname,
+			flags);
+}
+
+static int skel_mknodat(vfs_handle_struct *handle,
+			files_struct *dirfsp,
+			const struct smb_filename *smb_fname,
+			mode_t mode,
+			SMB_DEV_T dev)
+{
+	return SMB_VFS_NEXT_MKNODAT(handle,
+			dirfsp,
+			smb_fname,
+			mode,
+			dev);
+}
+
+static struct smb_filename *skel_realpath(vfs_handle_struct *handle,
+			TALLOC_CTX *ctx,
+			const struct smb_filename *smb_fname)
+{
+	return SMB_VFS_NEXT_REALPATH(handle, ctx, smb_fname);
+}
+
+static int skel_fchflags(vfs_handle_struct *handle,
+			struct files_struct *fsp,
+			uint flags)
+{
+	return SMB_VFS_NEXT_FCHFLAGS(handle, fsp, flags);
+}
+
+static struct file_id skel_file_id_create(vfs_handle_struct *handle,
+					  const SMB_STRUCT_STAT *sbuf)
+{
+	return SMB_VFS_NEXT_FILE_ID_CREATE(handle, sbuf);
+}
+
+static uint64_t skel_fs_file_id(vfs_handle_struct *handle,
+				const SMB_STRUCT_STAT *sbuf)
+{
+	return SMB_VFS_NEXT_FS_FILE_ID(handle, sbuf);
+}
+
+struct skel_offload_read_state {
+	struct vfs_handle_struct *handle;
+	uint32_t flags;
+	uint64_t xferlen;
+	DATA_BLOB token;
+};
+
+static void skel_offload_read_done(struct tevent_req *subreq);
+
+static struct tevent_req *skel_offload_read_send(
+	TALLOC_CTX *mem_ctx,
+	struct tevent_context *ev,
+	struct vfs_handle_struct *handle,
+	struct files_struct *fsp,
+	uint32_t fsctl,
+	uint32_t ttl,
+	off_t offset,
+	size_t to_copy)
+{
+	struct tevent_req *req = NULL;
+	struct skel_offload_read_state *state = NULL;
+	struct tevent_req *subreq = NULL;
+
+	req = tevent_req_create(mem_ctx, &state, struct skel_offload_read_state);
+	if (req == NULL) {
+		return NULL;
+	}
+	*state = (struct skel_offload_read_state) {
+		.handle = handle,
+	};
+
+	subreq = SMB_VFS_NEXT_OFFLOAD_READ_SEND(mem_ctx, ev, handle, fsp,
+						fsctl, ttl, offset, to_copy);
+	if (tevent_req_nomem(subreq, req)) {
+		return tevent_req_post(req, ev);
+	}
+	tevent_req_set_callback(subreq, skel_offload_read_done, req);
+	return req;
+}
+
+static void skel_offload_read_done(struct tevent_req *subreq)
+{
+	struct tevent_req *req = tevent_req_callback_data(
+		subreq, struct tevent_req);
+	struct skel_offload_read_state *state = tevent_req_data(
+		req, struct skel_offload_read_state);
+	NTSTATUS status;
+
+	status = SMB_VFS_NEXT_OFFLOAD_READ_RECV(subreq,
+						state->handle,
+						state,
+						&state->flags,
+						&state->xferlen,
+						&state->token);
+	TALLOC_FREE(subreq);
+	if (tevent_req_nterror(req, status)) {
+		return;
+	}
+
+	tevent_req_done(req);
+	return;
+}
+
+static NTSTATUS skel_offload_read_recv(struct tevent_req *req,
+				       struct vfs_handle_struct *handle,
+				       TALLOC_CTX *mem_ctx,
+				       uint32_t *flags,
+				       uint64_t *xferlen,
+				       DATA_BLOB *_token)
+{
+	struct skel_offload_read_state *state = tevent_req_data(
+		req, struct skel_offload_read_state);
+	DATA_BLOB token;
+	NTSTATUS status;
+
+	if (tevent_req_is_nterror(req, &status)) {
+		tevent_req_received(req);
+		return status;
+	}
+
+	token = data_blob_talloc(mem_ctx,
+				 state->token.data,
+				 state->token.length);
+
+	tevent_req_received(req);
+
+	if (token.data == NULL) {
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	*flags = state->flags;
+	*xferlen = state->xferlen;
+	*_token = token;
+	return NT_STATUS_OK;
+}
+
+struct skel_offload_write_state {
+	struct vfs_handle_struct *handle;
+	off_t copied;
+};
+static void skel_offload_write_done(struct tevent_req *subreq);
+
+static struct tevent_req *skel_offload_write_send(struct vfs_handle_struct *handle,
+					       TALLOC_CTX *mem_ctx,
+					       struct tevent_context *ev,
+					       uint32_t fsctl,
+					       DATA_BLOB *token,
+					       off_t transfer_offset,
+					       struct files_struct *dest_fsp,
+					       off_t dest_off,
+					       off_t num)
+{
+	struct tevent_req *req;
+	struct tevent_req *subreq;
+	struct skel_offload_write_state *state;
+
+	req = tevent_req_create(mem_ctx, &state, struct skel_offload_write_state);
+	if (req == NULL) {
+		return NULL;
+	}
+
+	state->handle = handle;
+	subreq = SMB_VFS_NEXT_OFFLOAD_WRITE_SEND(handle, state, ev,
+					      fsctl, token, transfer_offset,
+					      dest_fsp, dest_off, num);
+	if (tevent_req_nomem(subreq, req)) {
+		return tevent_req_post(req, ev);
+	}
+
+	tevent_req_set_callback(subreq, skel_offload_write_done, req);
+	return req;
+}
+
+static void skel_offload_write_done(struct tevent_req *subreq)
+{
+	struct tevent_req *req = tevent_req_callback_data(
+		subreq, struct tevent_req);
+	struct skel_offload_write_state *state
+			= tevent_req_data(req, struct skel_offload_write_state);
+	NTSTATUS status;
+
+	status = SMB_VFS_NEXT_OFFLOAD_WRITE_RECV(state->handle,
+					      subreq,
+					      &state->copied);
+	TALLOC_FREE(subreq);
+	if (tevent_req_nterror(req, status)) {
+		return;
+	}
+	tevent_req_done(req);
+}
+
+static NTSTATUS skel_offload_write_recv(struct vfs_handle_struct *handle,
+				     struct tevent_req *req,
+				     off_t *copied)
+{
+	struct skel_offload_write_state *state
+			= tevent_req_data(req, struct skel_offload_write_state);
+	NTSTATUS status;
+
+	*copied = state->copied;
+	if (tevent_req_is_nterror(req, &status)) {
+		tevent_req_received(req);
+		return status;
+	}
+
+	tevent_req_received(req);
+	return NT_STATUS_OK;
+}
+
+static NTSTATUS skel_fget_compression(struct vfs_handle_struct *handle,
+				     TALLOC_CTX *mem_ctx,
+				     struct files_struct *fsp,
+				     uint16_t *_compression_fmt)
+{
+	return SMB_VFS_NEXT_FGET_COMPRESSION(handle, mem_ctx, fsp,
+					    _compression_fmt);
+}
+
+static NTSTATUS skel_set_compression(struct vfs_handle_struct *handle,
+				     TALLOC_CTX *mem_ctx,
+				     struct files_struct *fsp,
+				     uint16_t compression_fmt)
+{
+	return SMB_VFS_NEXT_SET_COMPRESSION(handle, mem_ctx, fsp,
+					    compression_fmt);
+}
+
+static NTSTATUS skel_fstreaminfo(struct vfs_handle_struct *handle,
+				 struct files_struct *fsp,
+				 TALLOC_CTX *mem_ctx,
+				 unsigned int *num_streams,
+				 struct stream_struct **streams)
+{
+	return SMB_VFS_NEXT_FSTREAMINFO(handle,
+				fsp,
+				mem_ctx,
+				num_streams,
+				streams);
+}
+
+static NTSTATUS skel_get_real_filename_at(struct vfs_handle_struct *handle,
+					  struct files_struct *dirfsp,
+					  const char *name,
+					  TALLOC_CTX *mem_ctx,
+					  char **found_name)
+{
+	return SMB_VFS_NEXT_GET_REAL_FILENAME_AT(
+		handle, dirfsp, name, mem_ctx, found_name);
+}
+
+static const char *skel_connectpath(
+	struct vfs_handle_struct *handle,
+	const struct files_struct *dirfsp,
+	const struct smb_filename *smb_fname)
+{
+	return SMB_VFS_NEXT_CONNECTPATH(handle, dirfsp, smb_fname);
+}
+
+static NTSTATUS skel_brl_lock_windows(struct vfs_handle_struct *handle,
+				      struct byte_range_lock *br_lck,
+				      struct lock_struct *plock)
+{
+	return SMB_VFS_NEXT_BRL_LOCK_WINDOWS(handle, br_lck, plock);
+}
+
+static bool skel_brl_unlock_windows(struct vfs_handle_struct *handle,
+				    struct byte_range_lock *br_lck,
+				    const struct lock_struct *plock)
+{
+	return SMB_VFS_NEXT_BRL_UNLOCK_WINDOWS(handle, br_lck, plock);
+}
+
+static bool skel_strict_lock_check(struct vfs_handle_struct *handle,
+				   struct files_struct *fsp,
+				   struct lock_struct *plock)
+{
+	return SMB_VFS_NEXT_STRICT_LOCK_CHECK(handle, fsp, plock);
+}
+
+static NTSTATUS skel_translate_name(struct vfs_handle_struct *handle,
+				    const char *mapped_name,
+				    enum vfs_translate_direction direction,
+				    TALLOC_CTX *mem_ctx, char **pmapped_name)
+{
+	return SMB_VFS_NEXT_TRANSLATE_NAME(handle, mapped_name, direction,
+					   mem_ctx, pmapped_name);
+}
+
+static NTSTATUS skel_parent_pathname(struct vfs_handle_struct *handle,
+				     TALLOC_CTX *mem_ctx,
+				     const struct smb_filename *smb_fname_in,
+				     struct smb_filename **parent_dir_out,
+				     struct smb_filename **atname_out)
+{
+	return SMB_VFS_NEXT_PARENT_PATHNAME(handle,
+					    mem_ctx,
+					    smb_fname_in,
+					    parent_dir_out,
+					    atname_out);
+}
+
+static NTSTATUS skel_fsctl(struct vfs_handle_struct *handle,
+			   struct files_struct *fsp,
+			   TALLOC_CTX *ctx,
+			   uint32_t function,
+			   uint16_t req_flags,	/* Needed for UNICODE ... */
+			   const uint8_t *_in_data,
+			   uint32_t in_len,
+			   uint8_t ** _out_data,
+			   uint32_t max_out_len, uint32_t *out_len)
+{
+	return SMB_VFS_NEXT_FSCTL(handle,
+				  fsp,
+				  ctx,
+				  function,
+				  req_flags,
+				  _in_data,
+				  in_len, _out_data, max_out_len, out_len);
+}
+
+static NTSTATUS skel_freaddir_attr(struct vfs_handle_struct *handle,
+				   struct files_struct *fsp,
+				   TALLOC_CTX *mem_ctx,
+				   struct readdir_attr_data **pattr_data)
+{
+	return SMB_VFS_NEXT_FREADDIR_ATTR(handle, fsp, mem_ctx, pattr_data);
+}
+
+struct skel_get_dos_attributes_state {
+	struct vfs_aio_state aio_state;
+	uint32_t dosmode;
+};
+
+static void skel_get_dos_attributes_done(struct tevent_req *subreq);
+
+static struct tevent_req *skel_get_dos_attributes_send(
+			TALLOC_CTX *mem_ctx,
+			struct tevent_context *ev,
+			struct vfs_handle_struct *handle,
+			files_struct *dir_fsp,
+			struct smb_filename *smb_fname)
+{
+	struct tevent_req *req = NULL;
+	struct skel_get_dos_attributes_state *state = NULL;
+	struct tevent_req *subreq = NULL;
+
+	req = tevent_req_create(mem_ctx, &state,
+				struct skel_get_dos_attributes_state);
+	if (req == NULL) {
+		return NULL;
+	}
+
+	subreq = SMB_VFS_NEXT_GET_DOS_ATTRIBUTES_SEND(mem_ctx,
+						      ev,
+						      handle,
+						      dir_fsp,
+						      smb_fname);
+	if (tevent_req_nomem(subreq, req)) {
+		return tevent_req_post(req, ev);
+	}
+	tevent_req_set_callback(subreq, skel_get_dos_attributes_done, req);
+
+	return req;
+}
+
+static void skel_get_dos_attributes_done(struct tevent_req *subreq)
+{
+	struct tevent_req *req =
+		tevent_req_callback_data(subreq,
+		struct tevent_req);
+	struct skel_get_dos_attributes_state *state =
+		tevent_req_data(req,
+		struct skel_get_dos_attributes_state);
+	NTSTATUS status;
+
+	status = SMB_VFS_NEXT_GET_DOS_ATTRIBUTES_RECV(subreq,
+						      &state->aio_state,
+						      &state->dosmode);
+	TALLOC_FREE(subreq);
+	if (tevent_req_nterror(req, status)) {
+		return;
+	}
+
+	tevent_req_done(req);
+	return;
+}
+
+static NTSTATUS skel_get_dos_attributes_recv(struct tevent_req *req,
+					     struct vfs_aio_state *aio_state,
+					     uint32_t *dosmode)
+{
+	struct skel_get_dos_attributes_state *state =
+		tevent_req_data(req,
+		struct skel_get_dos_attributes_state);
+	NTSTATUS status;
+
+	if (tevent_req_is_nterror(req, &status)) {
+		tevent_req_received(req);
+		return status;
+	}
+
+	*aio_state = state->aio_state;
+	*dosmode = state->dosmode;
+	tevent_req_received(req);
+	return NT_STATUS_OK;
+}
+
+static NTSTATUS skel_fget_dos_attributes(struct vfs_handle_struct *handle,
+				struct files_struct *fsp,
+				uint32_t *dosmode)
+{
+	return SMB_VFS_NEXT_FGET_DOS_ATTRIBUTES(handle,
+				fsp,
+				dosmode);
+}
+
+static NTSTATUS skel_fset_dos_attributes(struct vfs_handle_struct *handle,
+				struct files_struct *fsp,
+				uint32_t dosmode)
+{
+	return SMB_VFS_NEXT_FSET_DOS_ATTRIBUTES(handle,
+				fsp,
+				dosmode);
+}
+
+static NTSTATUS skel_fget_nt_acl(vfs_handle_struct *handle, files_struct *fsp,
+				 uint32_t security_info,
+				 TALLOC_CTX *mem_ctx,
+				 struct security_descriptor **ppdesc)
+{
+	return SMB_VFS_NEXT_FGET_NT_ACL(handle, fsp, security_info, mem_ctx,
+					ppdesc);
+}
+
+static NTSTATUS skel_fset_nt_acl(vfs_handle_struct *handle, files_struct *fsp,
+				 uint32_t security_info_sent,
+				 const struct security_descriptor *psd)
+{
+	return SMB_VFS_NEXT_FSET_NT_ACL(handle, fsp, security_info_sent, psd);
+}
+
+static SMB_ACL_T skel_sys_acl_get_fd(vfs_handle_struct *handle,
+				     files_struct *fsp,
+				     SMB_ACL_TYPE_T type,
+				     TALLOC_CTX *mem_ctx)
+{
+	return SMB_VFS_NEXT_SYS_ACL_GET_FD(handle, fsp, type, mem_ctx);
+}
+
+static int skel_sys_acl_blob_get_fd(vfs_handle_struct *handle,
+				    files_struct *fsp, TALLOC_CTX *mem_ctx,
+				    char **blob_description, DATA_BLOB *blob)
+{
+	return SMB_VFS_NEXT_SYS_ACL_BLOB_GET_FD(handle, fsp, mem_ctx,
+						blob_description, blob);
+}
+
+static int skel_sys_acl_set_fd(vfs_handle_struct *handle,
+			       struct files_struct *fsp,
+			       SMB_ACL_TYPE_T type,
+			       SMB_ACL_T theacl)
+{
+	return SMB_VFS_NEXT_SYS_ACL_SET_FD(handle, fsp, type, theacl);
+}
+
+static int skel_sys_acl_delete_def_fd(vfs_handle_struct *handle,
+					struct files_struct *fsp)
+{
+	return SMB_VFS_NEXT_SYS_ACL_DELETE_DEF_FD(handle, fsp);
+}
+
+struct skel_getxattrat_state {
+	struct vfs_aio_state aio_state;
+	ssize_t xattr_size;
+	uint8_t *xattr_value;
+};
+
+static void skel_getxattrat_done(struct tevent_req *subreq);
+
+static struct tevent_req *skel_getxattrat_send(
+			TALLOC_CTX *mem_ctx,
+			struct tevent_context *ev,
+			struct vfs_handle_struct *handle,
+			files_struct *dir_fsp,
+			const struct smb_filename *smb_fname,
+			const char *xattr_name,
+			size_t alloc_hint)
+{
+	struct tevent_req *req = NULL;
+	struct skel_getxattrat_state *state = NULL;
+	struct tevent_req *subreq = NULL;
+
+	req = tevent_req_create(mem_ctx, &state,
+				struct skel_getxattrat_state);
+	if (req == NULL) {
+		return NULL;
+	}
+
+	subreq = SMB_VFS_NEXT_GETXATTRAT_SEND(state,
+					      ev,
+					      handle,
+					      dir_fsp,
+					      smb_fname,
+					      xattr_name,
+					      alloc_hint);
+	if (tevent_req_nomem(subreq, req)) {
+		return tevent_req_post(req, ev);
+	}
+	tevent_req_set_callback(subreq, skel_getxattrat_done, req);
+
+	return req;
+}
+
+static void skel_getxattrat_done(struct tevent_req *subreq)
+{
+	struct tevent_req *req = tevent_req_callback_data(
+		subreq, struct tevent_req);
+	struct skel_getxattrat_state *state = tevent_req_data(
+		req, struct skel_getxattrat_state);
+
+	state->xattr_size = SMB_VFS_NEXT_GETXATTRAT_RECV(subreq,
+							 &state->aio_state,
+							 state,
+							 &state->xattr_value);
+	TALLOC_FREE(subreq);
+	if (state->xattr_size == -1) {
+		tevent_req_error(req, state->aio_state.error);
+		return;
+	}
+
+	tevent_req_done(req);
+}
+
+static ssize_t skel_getxattrat_recv(struct tevent_req *req,
+				    struct vfs_aio_state *aio_state,
+				    TALLOC_CTX *mem_ctx,
+				    uint8_t **xattr_value)
+{
+	struct skel_getxattrat_state *state = tevent_req_data(
+		req, struct skel_getxattrat_state);
+	ssize_t xattr_size;
+
+	if (tevent_req_is_unix_error(req, &aio_state->error)) {
+		tevent_req_received(req);
+		return -1;
+	}
+
+	*aio_state = state->aio_state;
+	xattr_size = state->xattr_size;
+	if (xattr_value != NULL) {
+		*xattr_value = talloc_move(mem_ctx, &state->xattr_value);
+	}
+
+	tevent_req_received(req);
+	return xattr_size;
+}
+
+static ssize_t skel_fgetxattr(vfs_handle_struct *handle,
+			      struct files_struct *fsp, const char *name,
+			      void *value, size_t size)
+{
+	return SMB_VFS_NEXT_FGETXATTR(handle, fsp, name, value, size);
+}
+
+static ssize_t skel_flistxattr(vfs_handle_struct *handle,
+			       struct files_struct *fsp, char *list,
+			       size_t size)
+{
+	return SMB_VFS_NEXT_FLISTXATTR(handle, fsp, list, size);
+}
+
+static int skel_fremovexattr(vfs_handle_struct *handle,
+			     struct files_struct *fsp, const char *name)
+{
+	return SMB_VFS_NEXT_FREMOVEXATTR(handle, fsp, name);
+}
+
+static int skel_fsetxattr(vfs_handle_struct *handle, struct files_struct *fsp,
+			  const char *name, const void *value, size_t size,
+			  int flags)
+{
+	return SMB_VFS_NEXT_FSETXATTR(handle, fsp, name, value, size, flags);
+}
+
+static bool skel_aio_force(struct vfs_handle_struct *handle,
+			   struct files_struct *fsp)
+{
+	return SMB_VFS_NEXT_AIO_FORCE(handle, fsp);
+}
+
+static NTSTATUS skel_audit_file(struct vfs_handle_struct *handle,
+				struct smb_filename *file,
+				struct security_acl *sacl,
+				uint32_t access_requested,
+				uint32_t access_denied)
+{
+	return SMB_VFS_NEXT_AUDIT_FILE(handle,
+				       file,
+				       sacl,
+				       access_requested,
+				       access_denied);
+}
+
+static NTSTATUS skel_durable_cookie(struct vfs_handle_struct *handle,
+				    struct files_struct *fsp,
+				    TALLOC_CTX *mem_ctx,
+				    DATA_BLOB *cookie)
+{
+	return SMB_VFS_NEXT_DURABLE_COOKIE(handle,
+					   fsp,
+					   mem_ctx,
+					   cookie);
+}
+
+static NTSTATUS skel_durable_disconnect(struct vfs_handle_struct *handle,
+					struct files_struct *fsp,
+					const DATA_BLOB old_cookie,
+					TALLOC_CTX *mem_ctx,
+					DATA_BLOB *new_cookie)
+{
+	return SMB_VFS_NEXT_DURABLE_DISCONNECT(handle,
+					       fsp,
+					       old_cookie,
+					       mem_ctx,
+					       new_cookie);
+}
+
+static NTSTATUS skel_durable_reconnect(struct vfs_handle_struct *handle,
+				       struct smb_request *smb1req,
+				       struct smbXsrv_open *op,
+				       const DATA_BLOB old_cookie,
+				       TALLOC_CTX *mem_ctx,
+				       struct files_struct **fsp,
+				       DATA_BLOB *new_cookie)
+{
+	return SMB_VFS_NEXT_DURABLE_RECONNECT(handle,
+					      smb1req,
+					      op,
+					      old_cookie,
+					      mem_ctx,
+					      fsp,
+					      new_cookie);
+}
+
+/* VFS operations structure */
+
+static struct vfs_fn_pointers skel_transparent_fns = {
+	/* Disk operations */
+
+	.connect_fn = skel_connect,
+	.disconnect_fn = skel_disconnect,
+	.disk_free_fn = skel_disk_free,
+	.get_quota_fn = skel_get_quota,
+	.set_quota_fn = skel_set_quota,
+	.get_shadow_copy_data_fn = skel_get_shadow_copy_data,
+	.statvfs_fn = skel_statvfs,
+	.fs_capabilities_fn = skel_fs_capabilities,
+	.get_dfs_referrals_fn = skel_get_dfs_referrals,
+	.create_dfs_pathat_fn = skel_create_dfs_pathat,
+	.read_dfs_pathat_fn = skel_read_dfs_pathat,
+	.snap_check_path_fn = skel_snap_check_path,
+	.snap_create_fn = skel_snap_create,
+	.snap_delete_fn = skel_snap_delete,
+
+	/* Directory operations */
+
+	.fdopendir_fn = skel_fdopendir,
+	.readdir_fn = skel_readdir,
+	.rewind_dir_fn = skel_rewind_dir,
+	.mkdirat_fn = skel_mkdirat,
+	.closedir_fn = skel_closedir,
+
+	/* File operations */
+
+	.openat_fn = skel_openat,
+	.create_file_fn = skel_create_file,
+	.close_fn = skel_close_fn,
+	.pread_fn = skel_pread,
+	.pread_send_fn = skel_pread_send,
+	.pread_recv_fn = skel_pread_recv,
+	.pwrite_fn = skel_pwrite,
+	.pwrite_send_fn = skel_pwrite_send,
+	.pwrite_recv_fn = skel_pwrite_recv,
+	.lseek_fn = skel_lseek,
+	.sendfile_fn = skel_sendfile,
+	.recvfile_fn = skel_recvfile,
+	.renameat_fn = skel_renameat,
+	.fsync_send_fn = skel_fsync_send,
+	.fsync_recv_fn = skel_fsync_recv,
+	.stat_fn = skel_stat,
+	.fstat_fn = skel_fstat,
+	.lstat_fn = skel_lstat,
+	.fstatat_fn = skel_fstatat,
+	.get_alloc_size_fn = skel_get_alloc_size,
+	.unlinkat_fn = skel_unlinkat,
+	.fchmod_fn = skel_fchmod,
+	.fchown_fn = skel_fchown,
+	.lchown_fn = skel_lchown,
+	.chdir_fn = skel_chdir,
+	.getwd_fn = skel_getwd,
+	.fntimes_fn = skel_fntimes,
+	.ftruncate_fn = skel_ftruncate,
+	.fallocate_fn = skel_fallocate,
+	.lock_fn = skel_lock,
+	.filesystem_sharemode_fn = skel_filesystem_sharemode,
+	.fcntl_fn = skel_fcntl,
+	.linux_setlease_fn = skel_linux_setlease,
+	.getlock_fn = skel_getlock,
+	.symlinkat_fn = skel_symlinkat,
+	.readlinkat_fn = skel_vfs_readlinkat,
+	.linkat_fn = skel_linkat,
+	.mknodat_fn = skel_mknodat,
+	.realpath_fn = skel_realpath,
+	.fchflags_fn = skel_fchflags,
+	.file_id_create_fn = skel_file_id_create,
+	.fs_file_id_fn = skel_fs_file_id,
+	.offload_read_send_fn = skel_offload_read_send,
+	.offload_read_recv_fn = skel_offload_read_recv,
+	.offload_write_send_fn = skel_offload_write_send,
+	.offload_write_recv_fn = skel_offload_write_recv,
+	.fget_compression_fn = skel_fget_compression,
+	.set_compression_fn = skel_set_compression,
+
+	.fstreaminfo_fn = skel_fstreaminfo,
+	.get_real_filename_at_fn = skel_get_real_filename_at,
+	.connectpath_fn = skel_connectpath,
+	.brl_lock_windows_fn = skel_brl_lock_windows,
+	.brl_unlock_windows_fn = skel_brl_unlock_windows,
+	.strict_lock_check_fn = skel_strict_lock_check,
+	.translate_name_fn = skel_translate_name,
+	.parent_pathname_fn = skel_parent_pathname,
+	.fsctl_fn = skel_fsctl,
+	.freaddir_attr_fn = skel_freaddir_attr,
+	.audit_file_fn = skel_audit_file,
+
+	/* DOS attributes. */
+	.get_dos_attributes_send_fn = skel_get_dos_attributes_send,
+	.get_dos_attributes_recv_fn = skel_get_dos_attributes_recv,
+	.fget_dos_attributes_fn = skel_fget_dos_attributes,
+	.fset_dos_attributes_fn = skel_fset_dos_attributes,
+
+	/* NT ACL operations. */
+
+	.fget_nt_acl_fn = skel_fget_nt_acl,
+	.fset_nt_acl_fn = skel_fset_nt_acl,
+
+	/* POSIX ACL operations. */
+
+	.sys_acl_get_fd_fn = skel_sys_acl_get_fd,
+	.sys_acl_blob_get_fd_fn = skel_sys_acl_blob_get_fd,
+	.sys_acl_set_fd_fn = skel_sys_acl_set_fd,
+	.sys_acl_delete_def_fd_fn = skel_sys_acl_delete_def_fd,
+
+	/* EA operations. */
+	.getxattrat_send_fn = skel_getxattrat_send,
+	.getxattrat_recv_fn = skel_getxattrat_recv,
+	.fgetxattr_fn = skel_fgetxattr,
+	.flistxattr_fn = skel_flistxattr,
+	.fremovexattr_fn = skel_fremovexattr,
+	.fsetxattr_fn = skel_fsetxattr,
+
+	/* aio operations */
+	.aio_force_fn = skel_aio_force,
+
+	/* durable handle operations */
+	.durable_cookie_fn = skel_durable_cookie,
+	.durable_disconnect_fn = skel_durable_disconnect,
+	.durable_reconnect_fn = skel_durable_reconnect,
+};
+
+static_decl_vfs;
+NTSTATUS vfs_skel_transparent_init(TALLOC_CTX *ctx)
+{
+	/*
+	 * smb_vfs_assert_all_fns() is only needed in
+	 * order to have a complete example.
+	 *
+	 * A transparent vfs module typically don't
+	 * need to implement every calls.
+	 */
+	smb_vfs_assert_all_fns(&skel_transparent_fns, "skel_transparent");
+	return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "skel_transparent",
+				&skel_transparent_fns);
+}
diff --git a/examples/VFS/wscript_build b/examples/VFS/wscript_build
new file mode 100644
index 0000000..92fea70
--- /dev/null
+++ b/examples/VFS/wscript_build
@@ -0,0 +1,25 @@
+#!/usr/bin/env python
+
+bld.SAMBA3_MODULE('vfs_skel_opaque',
+                 subsystem='vfs',
+                 source='skel_opaque.c',
+                 deps='samba-util',
+                 init_function='',
+                 internal_module=bld.SAMBA3_IS_STATIC_MODULE('vfs_skel_opaque'),
+                 enabled=bld.SAMBA3_IS_ENABLED_MODULE('vfs_skel_opaque'))
+
+bld.SAMBA3_MODULE('vfs_skel_transparent',
+                 subsystem='vfs',
+                 source='skel_transparent.c',
+                 deps='samba-util',
+                 init_function='',
+                 internal_module=bld.SAMBA3_IS_STATIC_MODULE('vfs_skel_transparent'),
+                 enabled=bld.SAMBA3_IS_ENABLED_MODULE('vfs_skel_transparent'))
+
+bld.SAMBA3_MODULE('vfs_shadow_copy_test',
+                 subsystem='vfs',
+                 source='shadow_copy_test.c',
+                 deps='samba-util',
+                 init_function='',
+                 internal_module=bld.SAMBA3_IS_STATIC_MODULE('vfs_shadow_copy_test'),
+                 enabled=bld.SAMBA3_IS_ENABLED_MODULE('vfs_shadow_copy_test'))