Adding upstream version 2:4.17.12+dfsg.upstream/2%4.17.12+dfsgupstream

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

1 files changed, 2247 insertions, 0 deletions

diff --git a/source3/include/vfs.h b/source3/include/vfs.h
new file mode 100644
index 0000000..61360b3
--- /dev/null
+++ b/source3/include/vfs.h
@@ -0,0 +1,2247 @@
+/* 
+   Unix SMB/CIFS implementation.
+   VFS structures and parameters
+   Copyright (C) Jeremy Allison                         1999-2005
+   Copyright (C) Tim Potter				1999
+   Copyright (C) Alexander Bokovoy			2002-2005
+   Copyright (C) Stefan (metze) Metzmacher		2003
+   Copyright (C) Volker Lendecke			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/>.
+
+   This work was sponsored by Optifacio Software Services, Inc.
+*/
+
+#ifndef _VFS_H
+#define _VFS_H
+
+/* Avoid conflict with an AIX include file */
+
+#ifdef vfs_ops
+#undef vfs_ops
+#endif
+
+/*
+ * As we're now (thanks Andrew ! :-) using file_structs and connection
+ * structs in the vfs - then anyone writing a vfs must include includes.h...
+ */
+
+/*
+ * This next constant specifies the version number of the VFS interface
+ * this smbd will load. Increment this if *ANY* changes are made to the
+ * vfs_ops below. JRA.
+ *
+ * If you change anything here, please also update modules/vfs_full_audit.c.
+ * VL.
+ */
+
+/*
+ * Changed to version 2 for CIFS UNIX extensions (mknod and link added). JRA.
+ * Changed to version 3 for POSIX acl extensions. JRA.
+ * Changed to version 4 for cascaded VFS interface. Alexander Bokovoy.
+ * Changed to version 5 for sendfile addition. JRA.
+ * Changed to version 6 for the new module system, fixed cascading and quota functions. --metze
+ * Changed to version 7 to include the get_nt_acl info parameter. JRA.
+ * Changed to version 8 includes EA calls. JRA.
+ * Changed to version 9 to include the get_shadow_data call. --metze
+ * Changed to version 10 to include pread pwrite calls.
+ * Changed to version 11 to include seekdir telldir rewinddir calls. JRA
+ * Changed to version 12 to add mask and attributes to opendir(). JRA
+ * Also include aio calls. JRA.
+ * Changed to version 13 as the internal structure of files_struct has changed. JRA
+ * Changed to version 14 as we had to change DIR to SMB_STRUCT_DIR. JRA
+ * Changed to version 15 as we added the statvfs call. JRA
+ * Changed to version 16 as we added the getlock call. JRA
+ * Changed to version 17 as we removed redundant connection_struct parameters. --jpeach
+ * Changed to version 18 to add fsp parameter to the open call -- jpeach
+ * Also include kernel_flock call - jmcd
+ * Changed to version 19, kernel change notify has been merged
+ * Also included linux setlease call - jmcd
+ * Changed to version 20, use ntimes call instead of utime (greater
+ * timestamp resolition. JRA.
+ * Changed to version21 to add chflags operation -- jpeach
+ * Changed to version22 to add lchown operation -- jra
+ * Leave at 22 - not yet released. But change set_nt_acl to return an NTSTATUS. jra.
+ * Leave at 22 - not yet released. Add file_id_create operation. --metze
+ * Leave at 22 - not yet released. Change all BOOL parameters (int) to bool. jra.
+ * Leave at 22 - not yet released. Added recvfile.
+ * Leave at 22 - not yet released. Change get_nt_acl to return NTSTATUS - vl
+ * Leave at 22 - not yet released. Change get_nt_acl to *not* take a
+ * files_struct. - obnox.
+ * Leave at 22 - not yet released. Remove parameter fd from fget_nt_acl. - obnox
+ * Leave at 22 - not yet released. Remove parameter fd from gset_nt_acl. - obnox
+ * Leave at 22 - not yet released. Remove parameter fd from pread. - obnox
+ * Leave at 22 - not yet released. Remove parameter fd from pwrite. - obnox
+ * Leave at 22 - not yet released. Remove parameter fd from lseek. - obnox
+ * Leave at 22 - not yet released. Remove parameter fd from fsync. - obnox
+ * Leave at 22 - not yet released. Remove parameter fd from fstat. - obnox
+ * Leave at 22 - not yet released. Remove parameter fd from fchmod. - obnox
+ * Leave at 22 - not yet released. Remove parameter fd from fchown. - obnox
+ * Leave at 22 - not yet released. Remove parameter fd from ftruncate. - obnox
+ * Leave at 22 - not yet released. Remove parameter fd from lock. - obnox
+ * Leave at 22 - not yet released. Remove parameter fd from kernel_flock. - obnox
+ * Leave at 22 - not yet released. Remove parameter fd from linux_setlease. - obnox
+ * Leave at 22 - not yet released. Remove parameter fd from getlock. - obnox
+ * Leave at 22 - not yet released. Remove parameter fd from sys_acl_get_fd. - obnox
+ * Leave at 22 - not yet released. Remove parameter fd from fchmod_acl. - obnox
+ * Leave at 22 - not yet released. Remove parameter fd from sys_acl_set_fd. - obnox
+ * Leave at 22 - not yet released. Remove parameter fd from fgetxattr. - obnox
+ * Leave at 22 - not yet released. Remove parameter fd from flistxattr. - obnox
+ * Leave at 22 - not yet released. Remove parameter fd from fremovexattr. - obnox
+ * Leave at 22 - not yet released. Remove parameter fd from fsetxattr. - obnox
+ * Leave at 22 - not yet released. Remove parameter fd from aio_cancel. - obnox
+ * Leave at 22 - not yet released. Remove parameter fd from read. - obnox
+ * Leave at 22 - not yet released. Remove parameter fd from write. - obnox
+ * Leave at 22 - not yet released. Remove parameter fromfd from sendfile. - obnox
+ * Leave at 22 - not yet released. Remove parameter fromfd from recvfile. - obnox
+ * Leave at 22 - not yet released. Additional change: add operations for offline files -- ab
+ * Leave at 22 - not yet released. Add the streaminfo call. -- jpeach, vl
+ * Leave at 22 - not yet released. Remove parameter fd from close_fn. - obnox
+ * Changed to version 23 - remove set_nt_acl call. This can only be done via an
+ *                         open handle. JRA.
+ * Changed to version 24 - make security descriptor const in fset_nt_acl. JRA.
+ * Changed to version 25 - Jelmer's change from SMB_BIG_UINT to uint64_t.
+ * Leave at 25 - not yet released. Add create_file call. -- tprouty.
+ * Leave at 25 - not yet released. Add create time to ntimes. -- tstecher.
+ * Leave at 25 - not yet released. Add get_alloc_size call. -- tprouty.
+ * Leave at 25 - not yet released. Add SMB_STRUCT_STAT to readdir. - sdann
+ * Leave at 25 - not yet released. Add init_search_op call. - sdann
+ * Leave at 25 - not yet released. Add locking calls. -- zkirsch.
+ * Leave at 25 - not yet released. Add strict locking calls. -- drichards.
+ * Changed to version 26 - Plumb struct smb_filename to SMB_VFS_CREATE_FILE,
+ *                         SMB_VFS_OPEN, SMB_VFS_STAT, SMB_VFS_LSTAT,
+ *                         SMB_VFS_RENAME, SMB_VFS_UNLINK, SMB_VFS_NTIMES.
+ * Changed to version 27 - not yet released. Added enum timestamp_set_resolution
+ *                         return to fs_capabilities call. JRA.
+ * Leave at 27 - not yet released. Add translate_name VFS call to convert
+ *               UNIX names to Windows supported names -- asrinivasan.
+ * Changed to version 28 - Add private_flags uint32_t to CREATE call.
+ * Leave at 28 - not yet released. Change realpath to assume NULL and return a
+ *               malloc'ed path. JRA.
+ * Leave at 28 - not yet released. Move posix_fallocate into the VFS
+ *              where it belongs. JRA.
+ * Leave at 28 - not yet released. Rename posix_fallocate to fallocate
+ *              to split out the two possible uses. JRA.
+ * Leave at 28 - not yet released. Add fdopendir. JRA.
+ * Leave at 28 - not yet released. Rename open function to open_fn. - gd
+ * Leave at 28 - not yet released. Make getwd function always return malloced memory. JRA.
+ * Bump to version 29 - Samba 3.6.0 will ship with interface version 28.
+ * Leave at 29 - not yet releases. Add fsctl. Richard Sharpe
+ * Leave at 29 - not yet released. add SMB_VFS_GET_DFS_REFERRAL() - metze
+ * Leave at 29 - not yet released. Remove l{list,get,set,remove}xattr - abartlet
+ * Leave at 29 - not yet released. move to plain off_t - abartlet
+ * Leave at 29 - not yet released. Remove sys_acl functions other than set and get - abartlet
+ * Leave at 29 - not yet released. Added backup_intent bool to files_struct - JRA
+ * Leave at 29 - not yet released. Add durable handle functions - metze obnox
+ * Leave at 29 - not yet released. Added sys_acl_blob_get_file and sys_acl_blob_get_fd
+ * Bump to version 30 - Samba 4.0.0 will ship with interface version 30
+ * Leave at 30 - not yet released. Added conn->cwd to save vfs_GetWd() calls.
+ * Leave at 30 - not yet released. Changed sys_acl_blob_get_file interface to remove type
+ * Bump to version 31 - Samba 4.1.0 will ship with interface version 31
+ * Leave at 31 - not yet released. Make struct vuid_cache_entry in
+ *               connection_struct a pointer.
+ * Leave at 31 - not yet released. Add share_access to vuid_cache_entry.
+ * Leave at 31 - not yet released. add SMB_VFS_COPY_CHUNK()
+ * Leave at 31 - not yet released. Remove the unused
+ *               fsp->pending_break_messages array
+ * Leave at 31 - not yet released. add SMB_VFS_[GET SET]_COMPRESSION()
+ *
+ * Bump to version 32 - Samba 4.2 will ship with that.
+ * Version 32 - Add "lease" to CREATE_FILE operation
+ * Version 32 - Add "lease" to struct files_struct
+ * Version 32 - Add SMB_VFS_READDIR_ATTR()
+ * Version 32 - Add in and out create context blobs to create_file
+ * Version 32 - Remove unnecessary SMB_VFS_DISK_FREE() small_query parameter
+ * Bump to version 33 - Samba 4.3 will ship with that.
+ * Version 33 - change fallocate mode flags param from enum->uint32_t
+ * Version 33 - Add snapshot create delete calls
+ * Version 33 - Add OS X SMB2 AAPL copyfile extension flag to fsp
+ * Version 33 - Remove notify_watch_fn
+ * Bump to version 34 - Samba 4.4 will ship with that
+ * Version 34 - Remove bool posix_open, add uint64_t posix_flags
+ * Version 34 - Added bool posix_pathnames to struct smb_request
+ * Bump to version 35 - Samba 4.5 will ship with that
+ * Version 35 - Change get_nt_acl_fn from const char *, to
+ *              const struct smb_filename *
+ * Version 35 - Change mkdir from const char *, to
+ *              const struct smb_filename *
+ * Version 35 - Change rmdir from const char *, to
+ *              const struct smb_filename *
+ * Version 35 - Change opendir from const char *, to
+ *              const struct smb_filename *
+ * Version 35 - Wrap aio async funtions args in a struct vfs_aio_state
+ * Version 35 - Change chmod from const char *, to
+ *              const struct smb_filename *
+ * Version 35 - Change chmod_acl from const char *, to
+ *              const struct smb_filename *
+ * Version 35 - Change chown from const char *, to
+ *              const struct smb_filename *
+ * Version 35 - Change lchown from const char *, to
+ *              const struct smb_filename *
+ * Version 35 - Change streaminfo from const char *, to
+ *              const struct smb_filename *
+ * Version 35 - Add uint32_t flags to struct smb_filename
+ * Version 35 - Add get set fget fset dos attribute functions.
+ * Version 35 - Add bool use_ofd_locks to struct files_struct
+ * Bump to version 36 - Samba 4.6 will ship with that
+ * Version 36 - Remove is_offline and set_offline
+ * Version 37 - Module init functions now take a TALLOC_CTX * parameter.
+ * Version 37 - Add vfs_copy_chunk_flags for DUP_EXTENTS_TO_FILE
+ * Version 37 - Change sys_acl_delete_def_file from const char *
+ *              to const struct smb_filename *
+ * Version 37 - Change sys_acl_get_file from const char *
+ *              to const struct smb_filename *
+ * Version 37 - Change sys_acl_blob_get_file from const char *
+ *              to const struct smb_filename *
+ * Version 37 - Change sys_acl_set_file from const char *
+ *              to const struct smb_filename *
+ * Version 37 - Change listxattr from const char *
+ *              to const struct smb_filename *
+ * Version 37 - Change removexattr from const char *
+ *              to const struct smb_filename *
+ * Version 37 - Change setxattr from const char *
+ *              to const struct smb_filename *
+ * Version 37 - Change getxattr from const char *
+ *              to const struct smb_filename *
+ * Version 37 - Change mknod from const char * to const struct smb_filename *
+ * Version 37 - Change chflags from const char *
+ *              to const struct smb_filename *
+ * Version 37 - Change disk_free from const char *
+ *              to const struct smb_filename *
+ * Version 37 - Change get_quota from const char *
+ *              to const struct smb_filename *
+ * Version 37 - Change link from const char *
+ *              to const struct smb_filename *
+ * Version 37 - Change statvfs from const char *
+ *              to const struct smb_filename *
+ * Version 37 - Change readlink from const char *
+ *              to const struct smb_filename *
+ * Version 37 - Change symlink from const char *
+ *              to const struct smb_filename *
+ * Version 37 - Change chdir from const char *
+ *              to const struct smb_filename *
+ * Version 37 - Change getwd from char *
+ *              to const struct smb_filename *
+ * Version 37 - Change conn->cwd from char *
+ *              to struct smb_filename *
+ * Version 37 - Change realpath from char *
+ *              to struct smb_filename *
+ * Version 37 - Change connectpath from char *
+ *              to struct smb_filename *
+ * Version 37 - Add SMB_VFS_OFFLOAD_READ_SEND RECV
+ * Version 37 - Rename SMB_VFS_COPY_CHUNK_SEND RECV to
+ *              SMB_VFS_OFFLOAD_READ_SEND RECV
+ * Version 37 - Remove SMB_VFS_STRICT_UNLOCK
+ * Version 37 - Rename SMB_VFS_STRICT_LOCK to
+ *              SMB_VFS_STRICT_LOCK_CHECK
+ * Version 38 - Remove SMB_VFS_INIT_SEARCH_OP
+ * Bump to version 39, Samba 4.9 will ship with that
+ * Version 39 - Remove SMB_VFS_FSYNC
+ *              Only implement async versions.
+ * Version 39 - Remove SMB_VFS_READ
+ *              All users are now pread or async versions.
+ * Version 39 - Remove SMB_VFS_WRITE
+ *              All users are now pwrite or async versions.
+ * Version 39 - Remove SMB_VFS_CHMOD_ACL - no longer used.
+ * Version 39 - Remove SMB_VFS_FCHMOD_ACL - no longer used.
+ * Version 39 - Remove struct dfree_cached_info pointer from
+ *              connection struct
+ * Bump to version 40, Samba 4.10 will ship with that
+ * Version 40 - Add SMB_VFS_GETXATTRAT_SEND RECV
+ * Version 40 - Add SMB_VFS_GET_DOS_ATTRIBUTES_SEND RECV
+ * Bump to version 41, Samba 4.11 will ship with that
+ * Version 41 - Remove SMB_VFS_BRL_CANCEL_WINDOWS
+ * Version 41 - Remove unused st_ex_mask from struct stat_ex
+ * Version 41 - convert struct stat_ex.st_ex_calculated_birthtime to flags
+ * Version 41 - add st_ex_itime to struct stat_ex
+ * Version 41 - add st_ex_file_id to struct stat_ex
+ * Version 41 - add SMB_VFS_FS_FILE_ID
+ * Version 41 - Remove "blocking_lock" parameter from
+ *              SMB_VFS_BRL_LOCK_WINDOWS
+ * Version 41 - Remove "msg_ctx" parameter from SMB_VFS_BRL_UNLOCK_WINDOWS
+ * Bump to version 42, Samba 4.12 will ship with that
+ * Version 42 - Remove share_access member from struct files_struct
+ * Version 42 - Make "lease" a const* in create_file_fn
+ * Version 42 - Move SMB_VFS_RENAME -> SMB_VFS_RENAMEAT
+ * Version 42 - Move SMB_VFS_LINK -> SMB_VFS_LINKAT.
+ * Version 42 - Move SMB_VFS_MKNOD -> SMB_VFS_MKDNODAT.
+ * Version 42 - Move SMB_VFS_READLINK -> SMB_VFS_READLINKAT.
+ * Version 42 - Move SMB_VFS_SYMLINK -> SMB_VFS_SYMLINKAT.
+ * Version 42 - Move SMB_VFS_MKDIR -> SMB_VFS_MKDIRAT.
+ * Version 42 - Move change_to_user() -> change_to_user_and_service()
+ * Version 42 - Move change_to_user_by_fsp() -> change_to_user_and_service_by_fsp()
+ * Version 42 - Move [un]become_user*() -> [un]become_user_without_service*()
+ * Version 42 - Move SMB_VFS_UNLINK -> SMB_VFS_UNLINKAT.
+ * Version 42 - Add SMB_VFS_FCNTL
+ * Version 42 - Remove SMB_VFS_RMDIR.
+ *              Use SMB_VFS_UNLINKAT(.., AT_REMOVEDIR) instead.
+ * Version 42 - Remove SMB_VFS_CHOWN
+ * Version 42 - Remove struct write_cache *wcp from files_struct
+ * Version 42 - SMB_VFS_NTIMES() receives null times based on UTIMES_OMIT
+ * Version 42 - Add SMB_VFS_CREATE_DFS_PATHAT()
+ * Version 42 - Add SMB_VFS_READ_DFS_PATHAT()
+ * Change to Version 43 - will ship with 4.13.
+ * Version 43 - Remove deferred_close from struct files_struct
+ * Version 43 - Remove SMB_VFS_OPENDIR()
+ * Version 43 - Remove original_lcomp from struct smb_filename
+ * Version 43 - files_struct flags:
+ *              bool kernel_share_modes_taken
+ *              bool update_write_time_triggered
+ *              bool update_write_time_on_close
+ *              bool write_time_forced
+ *              bool can_lock
+ *              bool can_read
+ *              bool can_write
+ *              bool modified
+ *              bool is_directory
+ *              bool aio_write_behind
+ *              bool initial_delete_on_close
+ *              bool delete_on_close
+ *              bool is_sparse
+ *              bool backup_intent
+ *              bool use_ofd_locks
+ *              bool closing
+ *              bool lock_failure_seen
+ *              changed to bitfields.
+ * Version 43 - convert SMB_VFS_GET_REAL_FILENAME() arg path
+ *              to be a struct smb_filename
+ * Version 43 - convert link_contents arg of SMB_VFS_SYMLINKAT()
+ *              to struct smb_filename
+ * Version 43 - Move SMB_VFS_GET_NT_ACL() -> SMB_VFS_GET_NT_ACL_AT().
+ * Version 43 - Remove root_dir_fid from SMB_VFS_CREATE_FILE().
+ * Version 43 - Add dirfsp to struct files_struct
+ * Version 43 - Add dirfsp args to SMB_VFS_CREATE_FILE()
+ * Version 43 - Add SMB_VFS_OPENAT()
+ * Version 43 - Remove SMB_VFS_OPEN()
+ * Version 43 - SMB_VFS_READ_DFS_PATHAT() should take a non-const name.
+		There's no easy way to return stat info for a DFS link
+		otherwise.
+ * Change to Version 44 - will ship with 4.14.
+ * Version 44 - Remove dirfsp arg from struct files_struct
+ * Version 44 - Remove dirfsp arg to SMB_VFS_CREATE_FILE()
+ * Version 44 - Make dirfsp arg to SMB_VFS_READLINKAT() const
+ * Version 44 - Add a flag 'encryption_required' to files_struct that that
+ *              prevents that encrypted connections can be downgraded.
+ * Version 44 - Add a flag 'is_pathref' to struct files_struct.
+ * Version 44 - Add 'is_fsa' flag to struct files_struct.
+ * Version 44 - Add 'have_proc_fds' flag to struct connection_struct.
+ * Version 44 - Add 'have_proc_fds' flag to struct files_struct.
+ * Version 44 - Add dirfsp arg to SMB_VFS_READDIR()
+ * Version 44 - Replace SMB_VFS_GET_COMPRESSION() with SMB_VFS_FGET_COMPRESSION()
+ * Version 44 - Add type argument to SMB_VFS_SYS_ACL_SET_FD()
+ * Version 44 - Remove SMB_VFS_SYS_ACL_SET_FILE()
+ * Change to Version 45 - will ship with 4.15
+ * Version 45 - Remove SMB_VFS_LISTXATTR
+ * Version 45 - Remove SMB_VFS_SETXATTR
+ * Version 45 - Remove SMB_VFS_REMOVEXATTR
+ * Version 45 - Remove SMB_VFS_GET_DOS_ATTRIBUTES()
+ * Version 45 - Remove SMB_VFS_CHMOD
+ * Version 45 - Add SMB_VFS_FNTIMES
+ * Version 45 - Remove SMB_VFS_NTIMES
+ * Version 45 - ADD SMB_VFS_FSTREAMINFO
+ * Version 45 - Add SMB_VFS_FREADDIR_ATTR
+ * Version 45 - Remove SMB_VFS_READDIR_ATTR
+ * Version 45 - Add SMB_VFS_SYS_ACL_DELETE_DEF_FD
+ * Version 45 - Remove SMB_VFS_SYS_ACL_DELETE_DEF_FILE
+ * Version 45 - Add SMB_VFS_PARENT_PATHNAME
+ * Version 45 - Remove SMB_VFS_GET_NT_ACL_AT
+ * Version 45 - Remove SYS_ACL_GET_FILE
+ * Version 45 - Remove SYS_ACL_BLOB_GET_FILE
+ * Version 45 - Add SMB_VFS_FCHFLAGS
+ * Version 45 - Remove SMB_VFS_GETXATTR
+ * Change to Version 46 - will ship with 4.16
+ * Version 46 - Rename SMB_VFS_KERNEL_FLOCK to SMB_VFS_FILESYSTEM_SHAREMODE
+ * Version 46 - Add flags and xferlen args to SMB_VFS_OFFLOAD_READ_RECV
+ * Change to Version 47 - will ship with 4.17
+ * Version 47 - Add SMB_VFS_FSTATAT
+ * Version 47 - Change SMB_VFS_GET_REAL_FILENAME to return NTSTATUS
+ * Version 47 - remove st_ex_itime from struct stat_ex
+ * Version 47 - remove (unused) struct lock_struct last_lock_failure
+		from files_struct.
+ * Version 47 - Add SMB_VFS_GET_REAL_FILENAME_AT
+ * Version 47 - Replace SMB_VFS_GET_REAL_FILENAME with SMB_VFS_GET_REAL_FILENAME_AT
+ * Version 47 - Re-add dirfsp to CREATE_FILE
+ * Version 47 - Add fsp flag fstat_before_close
+ * Version 47 - Change SMB_VFS_OPENAT() to match the Linux openat2 prototype, add vfs_open_how
+ * Version 47 - Add VFS_OPEN_HOW_RESOLVE_NO_SYMLINKS for SMB_VFS_OPENAT()
+ */
+
+#define SMB_VFS_INTERFACE_VERSION 47
+
+/*
+    All intercepted VFS operations must be declared as static functions inside module source
+    in order to keep smbd namespace unpolluted. See source of audit, extd_audit, fake_perms and recycle
+    example VFS modules for more details.
+*/
+
+/* VFS operations structure */
+
+struct vfs_handle_struct;
+struct connection_struct;
+struct files_struct;
+struct security_descriptor;
+struct vfs_statvfs_struct;
+struct smb_request;
+struct ea_list;
+struct smb_file_time;
+struct smb_filename;
+struct dfs_GetDFSReferral;
+
+typedef union unid_t {
+	uid_t uid;
+	gid_t gid;
+} unid_t;
+
+struct fd_handle;
+
+struct fsp_lease {
+	size_t ref_count;
+	struct smbd_server_connection *sconn;
+	struct tevent_timer *timeout;
+	struct smb2_lease lease;
+};
+
+typedef struct files_struct {
+	struct files_struct *next, *prev;
+	uint64_t fnum;
+	struct smbXsrv_open *op;
+	struct connection_struct *conn;
+	struct fd_handle *fh;
+	unsigned int num_smb_operations;
+	struct file_id file_id;
+	uint64_t initial_allocation_size; /* Faked up initial allocation on disk. */
+	uint16_t file_pid;
+	uint64_t vuid; /* SMB2 compat */
+	struct timeval open_time;
+	uint32_t access_mask;		/* NTCreateX access bits (FILE_READ_DATA etc.) */
+	struct {
+		bool is_pathref : 1; /* See below */
+		bool is_fsa : 1;     /* See below */
+		bool have_proc_fds : 1;
+		bool kernel_share_modes_taken : 1;
+		bool update_write_time_triggered : 1;
+		bool update_write_time_on_close : 1;
+		bool write_time_forced : 1;
+		bool can_lock : 1;
+		bool can_read : 1;
+		bool can_write : 1;
+		bool modified : 1;
+		bool is_directory : 1;
+		bool is_dirfsp : 1;
+		bool aio_write_behind : 1;
+		bool initial_delete_on_close : 1;
+		bool delete_on_close : 1;
+		bool is_sparse : 1;
+		bool backup_intent : 1;
+		bool use_ofd_locks : 1;
+		bool closing : 1;
+		bool lock_failure_seen : 1;
+		bool encryption_required : 1;
+		bool fstat_before_close : 1;
+	} fsp_flags;
+
+	struct tevent_timer *update_write_time_event;
+	struct timespec close_write_time;
+
+	int oplock_type;
+
+	/*
+	 * Cache of our lease_type, stored as "current_state" in
+	 * leases.tdb
+	 */
+	int leases_db_seqnum;
+	uint32_t lease_type;
+
+	struct fsp_lease *lease;
+	int sent_oplock_break;
+	struct tevent_timer *oplock_timeout;
+	int current_lock_count; /* Count the number of outstanding locks and pending locks. */
+
+	uint64_t posix_flags;
+	struct smb_filename *fsp_name;
+	uint32_t name_hash;		/* Jenkins hash of full pathname. */
+	uint64_t mid;			/* Mid of the operation that created us. */
+
+	struct vfs_fsp_data *vfs_extension;
+	struct fake_file_handle *fake_file_handle;
+
+	struct notify_change_buf *notify;
+
+	struct files_struct *base_fsp; /* placeholder for delete on close */
+	struct files_struct *stream_fsp; /* backlink from base_fsp */
+
+	/*
+	 * Cache of share_mode_data->flags
+	 */
+	int share_mode_flags_seqnum;
+	uint16_t share_mode_flags;
+
+	/*
+	 * Read-only cached brlock record, thrown away when the
+	 * brlock.tdb seqnum changes. This avoids fetching data from
+	 * the brlock.tdb on every read/write call.
+	 */
+	int brlock_seqnum;
+	struct byte_range_lock *brlock_rec;
+
+	struct dptr_struct *dptr;
+
+	/* if not NULL, means this is a print file */
+	struct print_file_data *print_file;
+
+	/*
+	 * Optimize the aio_requests array for high performance: Never
+	 * shrink it, maintain num_aio_requests separately
+	 */
+	unsigned num_aio_requests;
+	struct tevent_req **aio_requests;
+
+	/*
+	 * Requests waiting for smb1 byte range locks. They are
+	 * generated by smbd_smb1_do_locks_send and are required here,
+	 * because lock cancel operations index through reply_lockingX
+	 * not based on mid but on the lock type and range.
+	 */
+	struct tevent_req **blocked_smb1_lock_reqs;
+
+	/*
+	 * SMB1 remembers lock failures and delays repeated blocking
+	 * lock attempts on the same offset.
+	 */
+	uint64_t lock_failure_offset;
+} files_struct;
+
+/*
+ * The fsp flags "is_pathref" and "is_fsa"
+ * =======================================
+ *
+ * Summary
+ * -------
+ *
+ * The flag "is_pathref" is a property of the low-level VFS-layer file
+ * handle. If "is_pathref" is true, only a subset of VFS calls are allowed
+ * on the handle and on systems that support it, the low-level fd is open
+ * with O_PATH. If "is_pathref" is false, the low-level fd is a "normal"
+ * file descriptor that can be used with all VFS calls.
+ *
+ * The flag "is_fsa" is a property of the FSA layer in Samba. The term FSA
+ * layer refers to the parts of smbd that implement Windows NTFS semantics
+ * on-top of a POSIX filesystem. If "is_fsa" is true, the fsp was
+ * processed by the SMB_VFS_CREATE_FILE() VFS call, otherwise the fsp was
+ * created by openat_pathref_fsp() which only connected the low-level
+ * handle by calling into VFS SMB_VFS_OPENAT(), but the whole FSA layer
+ * logic is skipped.
+ *
+ * Note that only three possible combinations of "is_pathref" and "is_fsa"
+ * are possible:
+ *
+ * | is_fsa \ is_pathref | + | - |
+ * |---------------------+---+---|
+ * | +                   | + | + |
+ * | -                   | + | - |
+ *
+ * So a fsp can't be a full low-level fd (is_pathref=false) and not be
+ * processed by the FSA layer.
+ *
+ * Details
+ * -------
+ *
+ * On Linux the O_PATH flag to open() can be used to open a filehandle on
+ * a file or directory with interesting properties:
+ *
+ * - the file-handle indicates a location in the filesystem tree,
+ * - no permission checks are done by the kernel and
+ * - only operations that act purely at the file descriptor level are
+ *   allowed.
+ *
+ * The file itself is not opened, and other file operations (e.g.,
+ * read(2), write(2), fchmod(2), fchown(2), fgetxattr(2), ioctl(2),
+ * mmap(2)) fail with the error EBADF.
+ *
+ * The following subset of operations that is relevant to Samba is allowed:
+ *
+ * - close(2),
+ * - fchdir(2), if the file descriptor refers to a directory,
+ * - fstat(2),
+ * - fstatfs(2) and
+ * - passing the file descriptor as the dirfd argument of openat() and the
+ *   other "*at()" system calls. This includes linkat(2) with
+ *   AT_EMPTY_PATH (or via procfs using AT_SYMLINK_FOLLOW) even if the
+ *   file is not a directory.
+ *
+ * Opening a file or directory with the O_PATH flag requires no
+ * permissions on the object itself (but does require execute permission
+ * on the directories in the path prefix). By contrast, obtaining a
+ * reference to a filesystem object by opening it with the O_RDONLY flag
+ * requires that the caller have read permission on the object, even when
+ * the subsequent operation (e.g., fchdir(2), fstat(2)) does not require
+ * read permission on the object. [1]
+ *
+ * If for example Samba receives an SMB request to open a file requesting
+ * SEC_FILE_READ_ATTRIBUTE access rights because the client wants to read
+ * the file's metadata from the handle, Samba will have to call POSIX
+ * open() with at least O_RDONLY access rights.
+ *
+ * Usecase for O_PATH in Samba
+ * ---------------------------
+ *
+ * By leveraging this Linux specific flags we can avoid permission
+ * mismatches as described above. Additionally O_PATH allows basing all
+ * filesystem accesses done by the fileserver on handle based syscalls by
+ * opening all client pathnames with O_PATH and consistently using for
+ * example fstat() instead of stat() throughout the codebase.
+ *
+ * Subsequently we will refer to Samba file-handles (fsp's) opened with
+ * O_PATH "path referencing fsp's" or "pathref" fsp's for short.
+ *
+ * Currently Samba bases the decision whether to call POSIX open() on a
+ * client pathname or whether to leave the low-level handle at -1, what we
+ * call a stat-open, in the function open_file() and it is based on the
+ * client requested SMB acccess mask.
+ *
+ * The set of rights that trigger an open() include READ_CONTROL_ACCESS,
+ * resulting in a call to open() with at least O_RDONLY. If the filesystem
+ * supports NT style ACLs natively (like GPFS or ZFS), the filesystem may
+ * grant the user requested right READ_CONTROL_ACCESS, but it may not
+ * grant READ_DATA (O_RDONLY), resulting in a permission denied error.
+ *
+ * Historically the set of access rights that triggered opening a file was:
+ *
+ *   FILE_READ_DATA
+ *   FILE_WRITE_DATA
+ *   FILE_APPEND_DATA
+ *   FILE_EXECUTE
+ *   WRITE_DAC_ACCESS
+ *   WRITE_OWNER_ACCESS
+ *   SEC_FLAG_SYSTEM_SECURITY
+ *   READ_CONTROL_ACCESS
+ *
+ * By using O_PATH this can be trimmed down to
+ *
+ *   FILE_READ_DATA
+ *   FILE_WRITE_DATA
+ *   FILE_APPEND_DATA
+ *   FILE_EXECUTE
+ *
+ * Fallback on systems without O_PATH support
+ * ------------------------------------------
+ *
+ * A fallback is needed that allows opening a file-handle with the same
+ * higher level semantics even if the system doesn't support O_PATH. This
+ * is implemented by impersonating the root user for the open()
+ * syscall. To avoid bypassing restrictive permissions on intermediate
+ * directories components of a path, the root user is only impersonated
+ * after changing directory to the parent directory of the client
+ * requested pathname.
+ *
+ * In order to avoid privilege escalation security issues with these root
+ * opened file-handles we must carefully control their usage throughout
+ * the codebase. Therefore we
+ *
+ * - tag the pathref fsp's with the flag "is_pathref" and
+ *
+ * - control access to the file-handle by making the structure private and only
+ *   allowing access with accessor functions.
+ *
+ * Two functions are used to fetch the low-level system file-handle from an fsp
+ *
+ * - fsp_get_io_fd(fsp): enforces fsp is NOT a pathref file-handle and
+ *
+ * - fsp_get_pathref_fd(fsp): allows fsp to be either a pathref file-handle or a
+ *   traditional POSIX file-handle opened with O_RDONLY or any other POSIX open
+ *   flag.
+ *
+ * The general guideline when to use which function is:
+ *
+ * - if you do something like fstat(fd), use fsp_get_pathref_fd(fsp),
+ * - if you do something like *at(dirfd, ...), use fsp_get_pathref_fd(fsp),
+ * - if you want to print the fd for example in DEBUG messages, use
+ *   fsp_get_pathref_fd(fsp),
+ * - if you want to call close(fd), use fsp_get_pathref_fd(fsp),
+ * - if you're doing a logical comparison of fd values, use
+ *   fsp_get_pathref_fd().
+ *
+ * In any other case use fsp_get_io_fd().
+ */
+
+#define FSP_POSIX_FLAGS_OPEN		0x01
+#define FSP_POSIX_FLAGS_RENAME		0x02
+#define FSP_POSIX_FLAGS_PATHNAMES	0x04
+
+#define FSP_POSIX_FLAGS_ALL			\
+	(FSP_POSIX_FLAGS_OPEN |			\
+	 FSP_POSIX_FLAGS_PATHNAMES |		\
+	 FSP_POSIX_FLAGS_RENAME)
+
+struct vuid_cache_entry {
+	struct auth_session_info *session_info;
+	uint64_t vuid; /* SMB2 compat */
+	bool read_only;
+	uint32_t share_access;
+};
+
+struct vuid_cache {
+	unsigned int next_entry;
+	struct vuid_cache_entry array[VUID_CACHE_SIZE];
+};
+
+typedef struct {
+	char *name;
+	bool is_wild;
+} name_compare_entry;
+
+struct share_params {
+	int service;
+};
+
+typedef struct connection_struct {
+	struct connection_struct *next, *prev;
+	struct smbd_server_connection *sconn; /* can be NULL */
+	struct smbXsrv_tcon *tcon; /* can be NULL */
+	uint32_t cnum; /* an index passed over the wire */
+	struct share_params *params;
+	bool force_user;
+	struct vuid_cache *vuid_cache;
+	bool printer;
+	bool ipc;
+	bool read_only; /* Attributes for the current user of the share. */
+	bool have_proc_fds;
+	uint64_t open_how_resolve; /* supported vfs_open_how.resolve features */
+	uint32_t share_access;
+	/* Does this filesystem honor
+	   sub second timestamps on files
+	   and directories when setting time ? */
+	enum timestamp_set_resolution ts_res;
+	char *connectpath;
+	struct files_struct *cwd_fsp; /* Working directory. */
+	bool tcon_done;
+
+	struct vfs_handle_struct *vfs_handles;		/* for the new plugins */
+
+	/*
+	 * This represents the user information on this connection. Depending
+	 * on the vuid using this tid, this might change per SMB request.
+	 */
+	struct auth_session_info *session_info;
+
+	/*
+	 * If the "force group" parameter is set, this is the primary gid that
+	 * may be used in the users token, depending on the vuid using this tid.
+	 */
+	gid_t force_group_gid;
+
+	uint64_t vuid; /* vuid of user who *opened* this connection, or UID_FIELD_INVALID */
+
+	time_t lastused;
+	time_t lastused_count;
+	int num_files_open;
+	unsigned int num_smb_operations; /* Count of smb operations on this tree. */
+	int encrypt_level;
+	bool encrypted_tid;
+
+	/* Semantics requested by the client or forced by the server config. */
+	bool case_sensitive;
+	bool case_preserve;
+	bool short_case_preserve;
+
+	/* Semantics provided by the underlying filesystem. */
+	int fs_capabilities;
+	/* Device number of the directory of the share mount.
+	   Used to ensure unique FileIndex returns. */
+	SMB_DEV_T base_share_dev;
+
+	name_compare_entry *hide_list; /* Per-share list of files to return as hidden. */
+	name_compare_entry *veto_list; /* Per-share list of files to veto (never show). */
+	name_compare_entry *veto_oplock_list; /* Per-share list of files to refuse oplocks on. */       
+	name_compare_entry *aio_write_behind_list; /* Per-share list of files to use aio write behind on. */       
+	struct trans_state *pending_trans;
+
+	struct rpc_pipe_client *spoolss_pipe;
+
+} connection_struct;
+
+struct smbd_smb2_request;
+struct referral;
+
+struct smb_request {
+	uint8_t cmd;
+	uint16_t flags2;
+	uint16_t smbpid;
+	uint64_t mid; /* For compatibility with SMB2. */
+	uint32_t seqnum;
+	uint64_t vuid; /* For compatibility with SMB2. */
+	uint32_t tid;
+	uint8_t  wct;
+	const uint16_t *vwv;
+	uint16_t buflen;
+	const uint8_t *buf;
+	const uint8_t *inbuf;
+
+	/*
+	 * Async handling in the main smb processing loop is directed by
+	 * outbuf: reply_xxx routines indicate sync behaviour by putting their
+	 * reply into "outbuf". If they leave it as NULL, they take care of it
+	 * themselves, possibly later.
+	 *
+	 * If async handling is wanted, the reply_xxx routine must make sure
+	 * that it talloc_move()s the smb_req somewhere else.
+	 */
+	uint8_t *outbuf;
+
+	size_t unread_bytes;
+	bool encrypted;
+	connection_struct *conn;
+	struct smbd_server_connection *sconn;
+	struct smbXsrv_connection *xconn;
+
+	/*
+	 * Pointer to session, can be NULL,
+	 * eg during negprot and session setup.
+	 */
+	struct smbXsrv_session *session;
+
+	struct smb_perfcount_data pcd;
+
+	/*
+	 * Chained request handling
+	 */
+	struct files_struct *chain_fsp;
+
+	/*
+	 * state information for async smb handling
+	 */
+	void *async_priv;
+
+	/*
+	 * Back pointer to smb2 request.
+	 */
+	struct smbd_smb2_request *smb2req;
+
+	/*
+	 * Request list for chained requests, we're part of it.
+	 */
+	struct smb_request **chain;
+
+	struct timeval request_time;
+
+	bool posix_pathnames;
+};
+
+/*
+ * Info about an alternate data stream
+ */
+
+struct stream_struct {
+	off_t size;
+	off_t alloc_size;
+	char *name;
+};
+
+/* time info */
+struct smb_file_time {
+	struct timespec mtime;
+	struct timespec atime;
+	struct timespec ctime;
+	struct timespec create_time;
+};
+
+/*
+ * smb_filename
+ */
+struct smb_filename {
+	char *base_name;
+	char *stream_name;
+	uint32_t flags;
+	SMB_STRUCT_STAT st;
+	NTTIME twrp;
+
+	/*
+	 * Internal file handle, O_PATH based if available,
+	 * otherwise O_RDONLY as root.
+	 */
+	struct files_struct *fsp;
+
+	/*
+	 * Link between the struct smb_filename and the above
+	 * fsp. fsp_link is a talloc child of the fsp. Ensures a possible
+	 * talloc_free(fsp) resets the smb_fname->fsp pointer to NULL in
+	 * the is fsp_link talloc destructor.
+	 */
+	struct fsp_smb_fname_link *fsp_link;
+};
+
+/*
+ * smb_filename flags. Define in terms of the FSP_POSIX_FLAGS_XX
+ * to keep the numeric values consistent.
+ */
+
+#define SMB_FILENAME_POSIX_PATH		FSP_POSIX_FLAGS_PATHNAMES
+
+#define VFS_FIND(__fn__) while (handle->fns->__fn__##_fn==NULL) { \
+				handle = handle->next; \
+			 }
+
+enum vfs_translate_direction {
+	vfs_translate_to_unix = 0,
+	vfs_translate_to_windows
+};
+
+enum vfs_fallocate_flags {
+	VFS_FALLOCATE_FL_KEEP_SIZE		= 0x0001,
+	VFS_FALLOCATE_FL_PUNCH_HOLE		= 0x0002,
+};
+
+struct vfs_aio_state {
+	int error;
+	uint64_t duration;
+};
+
+#define VFS_OPEN_HOW_RESOLVE_NO_SYMLINKS 1
+
+struct vfs_open_how {
+	int flags;
+	mode_t mode;
+	uint64_t resolve;
+};
+
+/*
+    Available VFS operations. These values must be in sync with vfs_ops struct
+    (struct vfs_fn_pointers and struct vfs_handle_pointers inside of struct vfs_ops).
+    In particular, if new operations are added to vfs_ops, appropriate constants
+    should be added to vfs_op_type so that order of them kept same as in vfs_ops.
+*/
+struct shadow_copy_data;
+
+struct vfs_fn_pointers {
+	/* Disk operations */
+
+	int (*connect_fn)(struct vfs_handle_struct *handle, const char *service, const char *user);
+	void (*disconnect_fn)(struct vfs_handle_struct *handle);
+	uint64_t (*disk_free_fn)(struct vfs_handle_struct *handle,
+				const struct smb_filename *smb_fname,
+				uint64_t *bsize,
+				uint64_t *dfree,
+				uint64_t *dsize);
+	int (*get_quota_fn)(struct vfs_handle_struct *handle,
+				const struct smb_filename *smb_fname,
+				enum SMB_QUOTA_TYPE qtype,
+				unid_t id,
+				SMB_DISK_QUOTA *qt);
+	int (*set_quota_fn)(struct vfs_handle_struct *handle, enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *qt);
+	int (*get_shadow_copy_data_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, struct shadow_copy_data *shadow_copy_data, bool labels);
+	int (*statvfs_fn)(struct vfs_handle_struct *handle,
+				const struct smb_filename *smb_fname,
+				struct vfs_statvfs_struct *statbuf);
+	uint32_t (*fs_capabilities_fn)(struct vfs_handle_struct *handle, enum timestamp_set_resolution *p_ts_res);
+
+	/*
+	 * Note: that "struct dfs_GetDFSReferral *r"
+	 * needs to be a valid TALLOC_CTX
+	 */
+	NTSTATUS (*get_dfs_referrals_fn)(struct vfs_handle_struct *handle,
+					 struct dfs_GetDFSReferral *r);
+	NTSTATUS (*create_dfs_pathat_fn)(struct vfs_handle_struct *handle,
+				struct files_struct *dirfsp,
+				const struct smb_filename *smb_fname,
+				const struct referral *reflist,
+				size_t referral_count);
+	NTSTATUS (*read_dfs_pathat_fn)(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);
+
+	/* Directory operations */
+
+	DIR *(*fdopendir_fn)(struct vfs_handle_struct *handle, files_struct *fsp, const char *mask, uint32_t attributes);
+	struct dirent *(*readdir_fn)(struct vfs_handle_struct *handle,
+				     struct files_struct *dirfsp,
+				     DIR *dirp,
+				     SMB_STRUCT_STAT *sbuf);
+	void (*seekdir_fn)(struct vfs_handle_struct *handle, DIR *dirp, long offset);
+	long (*telldir_fn)(struct vfs_handle_struct *handle, DIR *dirp);
+	void (*rewind_dir_fn)(struct vfs_handle_struct *handle, DIR *dirp);
+	int (*mkdirat_fn)(struct vfs_handle_struct *handle,
+			struct files_struct *dirfsp,
+			const struct smb_filename *smb_fname,
+			mode_t mode);
+	int (*closedir_fn)(struct vfs_handle_struct *handle, DIR *dir);
+
+	/* File operations */
+
+	int (*openat_fn)(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);
+	NTSTATUS (*create_file_fn)(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);
+	int (*close_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp);
+	ssize_t (*pread_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, void *data, size_t n, off_t offset);
+	struct tevent_req *(*pread_send_fn)(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);
+	ssize_t (*pread_recv_fn)(struct tevent_req *req, struct vfs_aio_state *state);
+	ssize_t (*pwrite_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, const void *data, size_t n, off_t offset);
+	struct tevent_req *(*pwrite_send_fn)(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);
+	ssize_t (*pwrite_recv_fn)(struct tevent_req *req, struct vfs_aio_state *state);
+	off_t (*lseek_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, off_t offset, int whence);
+	ssize_t (*sendfile_fn)(struct vfs_handle_struct *handle, int tofd, files_struct *fromfsp, const DATA_BLOB *header, off_t offset, size_t count);
+	ssize_t (*recvfile_fn)(struct vfs_handle_struct *handle, int fromfd, files_struct *tofsp, off_t offset, size_t count);
+	int (*renameat_fn)(struct vfs_handle_struct *handle,
+			 struct files_struct *srcdir_fsp,
+			 const struct smb_filename *smb_fname_src,
+			 struct files_struct *dstdir_fsp,
+			 const struct smb_filename *smb_fname_dst);
+	struct tevent_req *(*fsync_send_fn)(struct vfs_handle_struct *handle,
+					    TALLOC_CTX *mem_ctx,
+					    struct tevent_context *ev,
+					    struct files_struct *fsp);
+	int (*fsync_recv_fn)(struct tevent_req *req, struct vfs_aio_state *state);
+	int (*stat_fn)(struct vfs_handle_struct *handle, struct smb_filename *smb_fname);
+	int (*fstat_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, SMB_STRUCT_STAT *sbuf);
+	int (*lstat_fn)(struct vfs_handle_struct *handle, struct smb_filename *smb_filename);
+	int (*fstatat_fn)(
+		struct vfs_handle_struct *handle,
+		const struct files_struct *dirfsp,
+		const struct smb_filename *smb_fname,
+		SMB_STRUCT_STAT *sbuf,
+		int flags);
+	uint64_t (*get_alloc_size_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, const SMB_STRUCT_STAT *sbuf);
+	int (*unlinkat_fn)(struct vfs_handle_struct *handle,
+			struct files_struct *srcdir_fsp,
+			const struct smb_filename *smb_fname,
+			int flags);
+	int (*fchmod_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, mode_t mode);
+	int (*fchown_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, uid_t uid, gid_t gid);
+	int (*lchown_fn)(struct vfs_handle_struct *handle,
+			const struct smb_filename *smb_fname,
+			uid_t uid,
+			gid_t gid);
+	int (*chdir_fn)(struct vfs_handle_struct *handle,
+			 const struct smb_filename *smb_fname);
+	struct smb_filename *(*getwd_fn)(struct vfs_handle_struct *handle,
+				TALLOC_CTX *mem_ctx);
+	int (*fntimes_fn)(struct vfs_handle_struct *handle,
+			  struct files_struct *fsp,
+			  struct smb_file_time *ft);
+	int (*ftruncate_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, off_t offset);
+	int (*fallocate_fn)(struct vfs_handle_struct *handle,
+			    struct files_struct *fsp,
+			    uint32_t mode,
+			    off_t offset,
+			    off_t len);
+	bool (*lock_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, int op, off_t offset, off_t count, int type);
+	int (*filesystem_sharemode_fn)(struct vfs_handle_struct *handle,
+				       struct files_struct *fsp,
+				       uint32_t share_access, uint32_t
+				       access_mask);
+	int (*fcntl_fn)(struct vfs_handle_struct *handle,
+			struct files_struct *fsp, int cmd, va_list cmd_arg);
+	int (*linux_setlease_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, int leasetype);
+	bool (*getlock_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, off_t *poffset, off_t *pcount, int *ptype, pid_t *ppid);
+	int (*symlinkat_fn)(struct vfs_handle_struct *handle,
+				const struct smb_filename *link_contents,
+				struct files_struct *dirfsp,
+				const struct smb_filename *new_smb_fname);
+	int (*readlinkat_fn)(struct vfs_handle_struct *handle,
+				const struct files_struct *dirfsp,
+				const struct smb_filename *smb_fname,
+				char *buf,
+				size_t bufsiz);
+	int (*linkat_fn)(struct vfs_handle_struct *handle,
+				struct files_struct *srcfsp,
+				const struct smb_filename *old_smb_fname,
+				struct files_struct *dstfsp,
+				const struct smb_filename *new_smb_fname,
+				int flags);
+	int (*mknodat_fn)(struct vfs_handle_struct *handle,
+				struct files_struct *dirfsp,
+				const struct smb_filename *smb_fname,
+				mode_t mode,
+				SMB_DEV_T dev);
+	struct smb_filename *(*realpath_fn)(struct vfs_handle_struct *handle,
+				TALLOC_CTX *ctx,
+				const struct smb_filename *smb_fname);
+	int (*fchflags_fn)(struct vfs_handle_struct *handle,
+				struct files_struct *fsp,
+				unsigned int flags);
+	struct file_id (*file_id_create_fn)(struct vfs_handle_struct *handle,
+					    const SMB_STRUCT_STAT *sbuf);
+	uint64_t (*fs_file_id_fn)(struct vfs_handle_struct *handle,
+				  const SMB_STRUCT_STAT *sbuf);
+	struct tevent_req *(*offload_read_send_fn)(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);
+	NTSTATUS (*offload_read_recv_fn)(struct tevent_req *req,
+					 struct vfs_handle_struct *handle,
+					 TALLOC_CTX *mem_ctx,
+					 uint32_t *flags,
+					 uint64_t *xferlen,
+					 DATA_BLOB *token_blob);
+	struct tevent_req *(*offload_write_send_fn)(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 to_copy);
+	NTSTATUS (*offload_write_recv_fn)(struct vfs_handle_struct *handle,
+					  struct tevent_req *req,
+					  off_t *copied);
+	NTSTATUS (*fget_compression_fn)(struct vfs_handle_struct *handle,
+				       TALLOC_CTX *mem_ctx,
+				       struct files_struct *fsp,
+				       uint16_t *_compression_fmt);
+	NTSTATUS (*set_compression_fn)(struct vfs_handle_struct *handle,
+				       TALLOC_CTX *mem_ctx,
+				       struct files_struct *fsp,
+				       uint16_t compression_fmt);
+	NTSTATUS (*snap_check_path_fn)(struct vfs_handle_struct *handle,
+				       TALLOC_CTX *mem_ctx,
+				       const char *service_path,
+				       char **base_volume);
+	NTSTATUS (*snap_create_fn)(struct vfs_handle_struct *handle,
+				   TALLOC_CTX *mem_ctx,
+				   const char *base_volume,
+				   time_t *tstamp,
+				   bool rw,
+				   char **base_path,
+				   char **snap_path);
+	NTSTATUS (*snap_delete_fn)(struct vfs_handle_struct *handle,
+				   TALLOC_CTX *mem_ctx,
+				   char *base_path,
+				   char *snap_path);
+
+	NTSTATUS (*fstreaminfo_fn)(struct vfs_handle_struct *handle,
+				   struct files_struct *fsp,
+				   TALLOC_CTX *mem_ctx,
+				   unsigned int *num_streams,
+				   struct stream_struct **streams);
+
+	NTSTATUS (*get_real_filename_at_fn)(struct vfs_handle_struct *handle,
+					    struct files_struct *dirfsp,
+					    const char *name,
+					    TALLOC_CTX *mem_ctx,
+					    char **found_name);
+
+	const char *(*connectpath_fn)(struct vfs_handle_struct *handle,
+				      const struct smb_filename *smb_fname);
+
+	NTSTATUS (*brl_lock_windows_fn)(struct vfs_handle_struct *handle,
+					struct byte_range_lock *br_lck,
+					struct lock_struct *plock);
+
+	bool (*brl_unlock_windows_fn)(struct vfs_handle_struct *handle,
+				      struct byte_range_lock *br_lck,
+				      const struct lock_struct *plock);
+
+	bool (*strict_lock_check_fn)(struct vfs_handle_struct *handle,
+				     struct files_struct *fsp,
+				     struct lock_struct *plock);
+
+	NTSTATUS (*translate_name_fn)(struct vfs_handle_struct *handle,
+				      const char *name,
+				      enum vfs_translate_direction direction,
+				      TALLOC_CTX *mem_ctx,
+				      char **mapped_name);
+
+	NTSTATUS (*parent_pathname_fn)(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);
+
+	NTSTATUS (*fsctl_fn)(struct vfs_handle_struct *handle,
+			     struct files_struct *fsp,
+			     TALLOC_CTX *ctx,
+			     uint32_t function,
+			     uint16_t req_flags,
+			     const uint8_t *_in_data,
+			     uint32_t in_len,
+			     uint8_t **_out_data,
+			     uint32_t max_out_len,
+			     uint32_t *out_len); 
+
+	NTSTATUS (*fget_dos_attributes_fn)(struct vfs_handle_struct *handle,
+					   struct files_struct *fsp,
+					   uint32_t *dosmode);
+
+	NTSTATUS (*fset_dos_attributes_fn)(struct vfs_handle_struct *hande,
+					   struct files_struct *fsp,
+					   uint32_t dosmode);
+
+	struct tevent_req *(*get_dos_attributes_send_fn)(
+				TALLOC_CTX *mem_ctx,
+				struct tevent_context *ev,
+				struct vfs_handle_struct *handle,
+				files_struct *dir_fsp,
+				struct smb_filename *smb_fname);
+
+	NTSTATUS (*get_dos_attributes_recv_fn)(
+				struct tevent_req *req,
+				struct vfs_aio_state *aio_state,
+				uint32_t *dosmode);
+
+	/* NT ACL operations. */
+
+	NTSTATUS (*fget_nt_acl_fn)(struct vfs_handle_struct *handle,
+				   struct files_struct *fsp,
+				   uint32_t security_info,
+				   TALLOC_CTX *mem_ctx,
+				   struct security_descriptor **ppdesc);
+	NTSTATUS (*fset_nt_acl_fn)(struct vfs_handle_struct *handle,
+				   struct files_struct *fsp,
+				   uint32_t security_info_sent,
+				   const struct security_descriptor *psd);
+
+	NTSTATUS (*audit_file_fn)(struct vfs_handle_struct *handle,
+				  struct smb_filename *file,
+				  struct security_acl *sacl,
+				  uint32_t access_requested,
+				  uint32_t access_denied);
+
+	/* POSIX ACL operations. */
+
+	SMB_ACL_T (*sys_acl_get_fd_fn)(struct vfs_handle_struct *handle,
+				       struct files_struct *fsp,
+				       SMB_ACL_TYPE_T type,
+				       TALLOC_CTX *mem_ctx);
+	int (*sys_acl_blob_get_fd_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp,
+				      TALLOC_CTX *mem_ctx, char **blob_description,
+				      DATA_BLOB *blob);
+	int (*sys_acl_set_fd_fn)(struct vfs_handle_struct *handle,
+				 struct files_struct *fsp,
+				 SMB_ACL_TYPE_T type,
+				 SMB_ACL_T theacl);
+	int (*sys_acl_delete_def_fd_fn)(struct vfs_handle_struct *handle,
+					struct files_struct *fsp);
+
+	/* EA operations. */
+	struct tevent_req *(*getxattrat_send_fn)(
+				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);
+	ssize_t (*getxattrat_recv_fn)(struct tevent_req *req,
+				      struct vfs_aio_state *aio_state,
+				      TALLOC_CTX *mem_ctx,
+				      uint8_t **xattr_value);
+	ssize_t (*fgetxattr_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, const char *name, void *value, size_t size);
+	ssize_t (*flistxattr_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, char *list, size_t size);
+	int (*fremovexattr_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, const char *name);
+	int (*fsetxattr_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, const char *name, const void *value, size_t size, int flags);
+
+	/* aio operations */
+	bool (*aio_force_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp);
+
+	/* durable handle operations */
+	NTSTATUS (*durable_cookie_fn)(struct vfs_handle_struct *handle,
+				      struct files_struct *fsp,
+				      TALLOC_CTX *mem_ctx,
+				      DATA_BLOB *cookie);
+	NTSTATUS (*durable_disconnect_fn)(struct vfs_handle_struct *handle,
+					  struct files_struct *fsp,
+					  const DATA_BLOB old_cookie,
+					  TALLOC_CTX *mem_ctx,
+					  DATA_BLOB *new_cookie);
+	NTSTATUS (*durable_reconnect_fn)(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);
+
+	NTSTATUS (*freaddir_attr_fn)(struct vfs_handle_struct *handle,
+				     struct files_struct *fsp,
+				     TALLOC_CTX *mem_ctx,
+				     struct readdir_attr_data **attr_data);
+};
+
+/*
+    VFS operation description. Each VFS module registers an array of vfs_op_tuple to VFS subsystem,
+    which describes all operations this module is willing to intercept.
+    VFS subsystem initializes then the conn->vfs_ops and conn->vfs_opaque_ops structs
+    using this information.
+*/
+
+typedef struct vfs_handle_struct {
+	struct vfs_handle_struct  *next, *prev;
+	const char *param;
+	struct connection_struct *conn;
+	const struct vfs_fn_pointers *fns;
+	void *data;
+	void (*free_data)(void **data);
+} vfs_handle_struct;
+
+
+struct vfs_statvfs_struct {
+	/* For undefined recommended transfer size return -1 in that field */
+	uint32_t OptimalTransferSize;  /* bsize on some os, iosize on other os */
+	uint32_t BlockSize;
+
+	/*
+	 The next three fields are in terms of the block size.
+	 (above). If block size is unknown, 4096 would be a
+	 reasonable block size for a server to report.
+	 Note that returning the blocks/blocksavail removes need
+	 to make a second call (to QFSInfo level 0x103 to get this info.
+	 UserBlockAvail is typically less than or equal to BlocksAvail,
+	 if no distinction is made return the same value in each.
+	*/
+
+	uint64_t TotalBlocks;
+	uint64_t BlocksAvail;       /* bfree */
+	uint64_t UserBlocksAvail;   /* bavail */
+
+	/* For undefined Node fields or FSID return -1 */
+	uint64_t TotalFileNodes;
+	uint64_t FreeFileNodes;
+	uint64_t FsIdentifier;   /* fsid */
+	/* NB Namelen comes from FILE_SYSTEM_ATTRIBUTE_INFO call */
+	/* NB flags can come from FILE_SYSTEM_DEVICE_INFO call   */
+
+	int FsCapabilities;
+};
+
+/* Add a new FSP extension of the given type. Returns a pointer to the
+ * extenstion data.
+ */
+#define VFS_ADD_FSP_EXTENSION(handle, fsp, type, destroy_fn)		\
+    (type *)vfs_add_fsp_extension_notype(handle, (fsp), sizeof(type), (destroy_fn))
+
+/* Return a pointer to the existing FSP extension data. */
+#define VFS_FETCH_FSP_EXTENSION(handle, fsp) \
+    vfs_fetch_fsp_extension(handle, (fsp))
+
+/* Return the talloc context associated with an FSP extension. */
+#define VFS_MEMCTX_FSP_EXTENSION(handle, fsp) \
+    vfs_memctx_fsp_extension(handle, (fsp))
+
+/* Remove and destroy an FSP extension. */
+#define VFS_REMOVE_FSP_EXTENSION(handle, fsp) \
+    vfs_remove_fsp_extension((handle), (fsp))
+
+#define SMB_VFS_HANDLE_GET_DATA(handle, datap, type, ret) { \
+	if (!(handle)||((datap=(type *)(handle)->data)==NULL)) { \
+		DEBUG(0,("%s() failed to get vfs_handle->data!\n",__FUNCTION__)); \
+		ret; \
+	} \
+}
+
+#define SMB_VFS_HANDLE_SET_DATA(handle, datap, free_fn, type, ret) { \
+	if (!(handle)) { \
+		DEBUG(0,("%s() failed to set handle->data!\n",__FUNCTION__)); \
+		ret; \
+	} else { \
+		if ((handle)->free_data) { \
+			(handle)->free_data(&(handle)->data); \
+		} \
+		(handle)->data = (void *)datap; \
+		(handle)->free_data = free_fn; \
+	} \
+}
+
+#define SMB_VFS_HANDLE_FREE_DATA(handle) { \
+	if ((handle) && (handle)->free_data) { \
+		(handle)->free_data(&(handle)->data); \
+	} \
+}
+
+/* Check whether module-specific data handle was already allocated or not */
+#define SMB_VFS_HANDLE_TEST_DATA(handle)  ( !(handle) || !(handle)->data ? False : True )
+
+#define SMB_VFS_OP(x) ((void *) x)
+
+#define DEFAULT_VFS_MODULE_NAME "/[Default VFS]/"
+
+#include "vfs_macros.h"
+
+int smb_vfs_call_connect(struct vfs_handle_struct *handle,
+			 const char *service, const char *user);
+void smb_vfs_call_disconnect(struct vfs_handle_struct *handle);
+uint64_t smb_vfs_call_disk_free(struct vfs_handle_struct *handle,
+				const struct smb_filename *smb_filename,
+				uint64_t *bsize,
+				uint64_t *dfree,
+				uint64_t *dsize);
+int smb_vfs_call_get_quota(struct vfs_handle_struct *handle,
+				const struct smb_filename *smb_filename,
+				enum SMB_QUOTA_TYPE qtype,
+				unid_t id,
+				SMB_DISK_QUOTA *qt);
+int smb_vfs_call_set_quota(struct vfs_handle_struct *handle,
+			   enum SMB_QUOTA_TYPE qtype, unid_t id,
+			   SMB_DISK_QUOTA *qt);
+int smb_vfs_call_get_shadow_copy_data(struct vfs_handle_struct *handle,
+				      struct files_struct *fsp,
+				      struct shadow_copy_data *shadow_copy_data,
+				      bool labels);
+int smb_vfs_call_statvfs(struct vfs_handle_struct *handle,
+			const struct smb_filename *smb_fname,
+			struct vfs_statvfs_struct *statbuf);
+uint32_t smb_vfs_call_fs_capabilities(struct vfs_handle_struct *handle,
+				      enum timestamp_set_resolution *p_ts_res);
+/*
+ * Note: that "struct dfs_GetDFSReferral *r" needs to be a valid TALLOC_CTX
+ */
+NTSTATUS smb_vfs_call_get_dfs_referrals(struct vfs_handle_struct *handle,
+					struct dfs_GetDFSReferral *r);
+NTSTATUS smb_vfs_call_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);
+NTSTATUS smb_vfs_call_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);
+DIR *smb_vfs_call_fdopendir(struct vfs_handle_struct *handle,
+					struct files_struct *fsp,
+					const char *mask,
+					uint32_t attributes);
+struct dirent *smb_vfs_call_readdir(struct vfs_handle_struct *handle,
+				    struct files_struct *dirfsp,
+				    DIR *dirp,
+				    SMB_STRUCT_STAT *sbuf);
+void smb_vfs_call_seekdir(struct vfs_handle_struct *handle,
+			  DIR *dirp, long offset);
+long smb_vfs_call_telldir(struct vfs_handle_struct *handle,
+			  DIR *dirp);
+void smb_vfs_call_rewind_dir(struct vfs_handle_struct *handle,
+			     DIR *dirp);
+int smb_vfs_call_mkdirat(struct vfs_handle_struct *handle,
+			struct files_struct *dirfsp,
+			const struct smb_filename *smb_fname,
+			mode_t mode);
+int smb_vfs_call_closedir(struct vfs_handle_struct *handle,
+			  DIR *dir);
+int smb_vfs_call_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);
+NTSTATUS smb_vfs_call_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);
+int smb_vfs_call_close(struct vfs_handle_struct *handle,
+		       struct files_struct *fsp);
+ssize_t smb_vfs_call_pread(struct vfs_handle_struct *handle,
+			   struct files_struct *fsp, void *data, size_t n,
+			   off_t offset);
+struct tevent_req *smb_vfs_call_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);
+ssize_t SMB_VFS_PREAD_RECV(struct tevent_req *req, struct vfs_aio_state *state);
+
+ssize_t smb_vfs_call_pwrite(struct vfs_handle_struct *handle,
+			    struct files_struct *fsp, const void *data,
+			    size_t n, off_t offset);
+struct tevent_req *smb_vfs_call_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);
+ssize_t SMB_VFS_PWRITE_RECV(struct tevent_req *req, struct vfs_aio_state *state);
+
+off_t smb_vfs_call_lseek(struct vfs_handle_struct *handle,
+			     struct files_struct *fsp, off_t offset,
+			     int whence);
+ssize_t smb_vfs_call_sendfile(struct vfs_handle_struct *handle, int tofd,
+			      files_struct *fromfsp, const DATA_BLOB *header,
+			      off_t offset, size_t count);
+ssize_t smb_vfs_call_recvfile(struct vfs_handle_struct *handle, int fromfd,
+			      files_struct *tofsp, off_t offset,
+			      size_t count);
+int smb_vfs_call_renameat(struct vfs_handle_struct *handle,
+			struct files_struct *srcfsp,
+			const struct smb_filename *smb_fname_src,
+			struct files_struct *dstfsp,
+			const struct smb_filename *smb_fname_dst);
+
+struct tevent_req *smb_vfs_call_fsync_send(struct vfs_handle_struct *handle,
+					   TALLOC_CTX *mem_ctx,
+					   struct tevent_context *ev,
+					   struct files_struct *fsp);
+int SMB_VFS_FSYNC_RECV(struct tevent_req *req, struct vfs_aio_state *state);
+
+int smb_vfs_fsync_sync(files_struct *fsp);
+int smb_vfs_call_stat(struct vfs_handle_struct *handle,
+		      struct smb_filename *smb_fname);
+int smb_vfs_call_fstat(struct vfs_handle_struct *handle,
+		       struct files_struct *fsp, SMB_STRUCT_STAT *sbuf);
+int smb_vfs_call_lstat(struct vfs_handle_struct *handle,
+		       struct smb_filename *smb_filename);
+int smb_vfs_call_fstatat(
+	struct vfs_handle_struct *handle,
+	const struct files_struct *dirfsp,
+	const struct smb_filename *smb_fname,
+	SMB_STRUCT_STAT *sbuf,
+	int flags);
+uint64_t smb_vfs_call_get_alloc_size(struct vfs_handle_struct *handle,
+				     struct files_struct *fsp,
+				     const SMB_STRUCT_STAT *sbuf);
+int smb_vfs_call_unlinkat(struct vfs_handle_struct *handle,
+			struct files_struct *dirfsp,
+			const struct smb_filename *smb_fname,
+			int flags);
+int smb_vfs_call_fchmod(struct vfs_handle_struct *handle,
+			struct files_struct *fsp, mode_t mode);
+int smb_vfs_call_fchown(struct vfs_handle_struct *handle,
+			struct files_struct *fsp, uid_t uid, gid_t gid);
+int smb_vfs_call_lchown(struct vfs_handle_struct *handle,
+			const struct smb_filename *smb_fname,
+			uid_t uid,
+			gid_t gid);
+int smb_vfs_call_chdir(struct vfs_handle_struct *handle,
+			const struct smb_filename *smb_fname);
+struct smb_filename *smb_vfs_call_getwd(struct vfs_handle_struct *handle,
+				TALLOC_CTX *ctx);
+int smb_vfs_call_ntimes(struct vfs_handle_struct *handle,
+			const struct smb_filename *smb_fname,
+			struct smb_file_time *ft);
+int smb_vfs_call_fntimes(struct vfs_handle_struct *handle,
+			 struct files_struct *fsp,
+			 struct smb_file_time *ft);
+int smb_vfs_call_ftruncate(struct vfs_handle_struct *handle,
+			   struct files_struct *fsp, off_t offset);
+int smb_vfs_call_fallocate(struct vfs_handle_struct *handle,
+			   struct files_struct *fsp,
+			   uint32_t mode,
+			   off_t offset,
+			   off_t len);
+bool smb_vfs_call_lock(struct vfs_handle_struct *handle,
+		       struct files_struct *fsp, int op, off_t offset,
+		       off_t count, int type);
+int smb_vfs_call_filesystem_sharemode(struct vfs_handle_struct *handle,
+				      struct files_struct *fsp,
+				      uint32_t share_access,
+				      uint32_t access_mask);
+int smb_vfs_call_fcntl(struct vfs_handle_struct *handle,
+		       struct files_struct *fsp, int cmd, ...);
+int smb_vfs_call_linux_setlease(struct vfs_handle_struct *handle,
+				struct files_struct *fsp, int leasetype);
+bool smb_vfs_call_getlock(struct vfs_handle_struct *handle,
+			  struct files_struct *fsp, off_t *poffset,
+			  off_t *pcount, int *ptype, pid_t *ppid);
+int smb_vfs_call_symlinkat(struct vfs_handle_struct *handle,
+			const struct smb_filename *link_contents,
+			struct files_struct *dirfsp,
+			const struct smb_filename *new_smb_fname);
+int smb_vfs_call_readlinkat(struct vfs_handle_struct *handle,
+			const struct files_struct *dirfsp,
+			const struct smb_filename *smb_fname,
+			char *buf,
+			size_t bufsiz);
+int smb_vfs_call_linkat(struct vfs_handle_struct *handle,
+			struct files_struct *srcfsp,
+			const struct smb_filename *old_smb_fname,
+			struct files_struct *dstfsp,
+			const struct smb_filename *new_smb_fname,
+			int flags);
+int smb_vfs_call_mknodat(struct vfs_handle_struct *handle,
+			struct files_struct *dirfsp,
+			const struct smb_filename *smb_fname,
+			mode_t mode,
+			SMB_DEV_T dev);
+struct smb_filename *smb_vfs_call_realpath(struct vfs_handle_struct *handle,
+			TALLOC_CTX *ctx,
+			const struct smb_filename *smb_fname);
+int smb_vfs_call_chflags(struct vfs_handle_struct *handle,
+			const struct smb_filename *smb_fname,
+			unsigned int flags);
+int smb_vfs_call_fchflags(struct vfs_handle_struct *handle,
+			struct files_struct *fsp,
+			unsigned int flags);
+struct file_id smb_vfs_call_file_id_create(struct vfs_handle_struct *handle,
+					   const SMB_STRUCT_STAT *sbuf);
+uint64_t smb_vfs_call_fs_file_id(struct vfs_handle_struct *handle,
+				 const SMB_STRUCT_STAT *sbuf);
+NTSTATUS smb_vfs_call_fstreaminfo(struct vfs_handle_struct *handle,
+				  struct files_struct *fsp,
+				  TALLOC_CTX *mem_ctx,
+				  unsigned int *num_streams,
+				  struct stream_struct **streams);
+NTSTATUS smb_vfs_call_get_real_filename_at(struct vfs_handle_struct *handle,
+					   struct files_struct *dirfsp,
+					   const char *name,
+					   TALLOC_CTX *mem_ctx,
+					   char **found_name);
+const char *smb_vfs_call_connectpath(struct vfs_handle_struct *handle,
+				     const struct smb_filename *smb_fname);
+NTSTATUS smb_vfs_call_brl_lock_windows(struct vfs_handle_struct *handle,
+				       struct byte_range_lock *br_lck,
+				       struct lock_struct *plock);
+bool smb_vfs_call_brl_unlock_windows(struct vfs_handle_struct *handle,
+				     struct byte_range_lock *br_lck,
+				     const struct lock_struct *plock);
+bool smb_vfs_call_strict_lock_check(struct vfs_handle_struct *handle,
+				    struct files_struct *fsp,
+				    struct lock_struct *plock);
+NTSTATUS smb_vfs_call_translate_name(struct vfs_handle_struct *handle,
+				     const char *name,
+				     enum vfs_translate_direction direction,
+				     TALLOC_CTX *mem_ctx,
+				     char **mapped_name);
+NTSTATUS smb_vfs_call_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);
+NTSTATUS smb_vfs_call_fsctl(struct vfs_handle_struct *handle,
+			    struct files_struct *fsp,
+			    TALLOC_CTX *ctx,
+			    uint32_t function,
+			    uint16_t req_flags,
+			    const uint8_t *_in_data,
+			    uint32_t in_len,
+			    uint8_t **_out_data,
+			    uint32_t max_out_len,
+			    uint32_t *out_len);
+NTSTATUS smb_vfs_call_fget_dos_attributes(struct vfs_handle_struct *handle,
+					  struct files_struct *fsp,
+					  uint32_t *dosmode);
+NTSTATUS smb_vfs_call_fset_dos_attributes(struct vfs_handle_struct *handle,
+					  struct files_struct *fsp,
+					  uint32_t dosmode);
+struct tevent_req *smb_vfs_call_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);
+NTSTATUS smb_vfs_call_get_dos_attributes_recv(
+			struct tevent_req *req,
+			struct vfs_aio_state *aio_state,
+			uint32_t *dosmode);
+struct tevent_req *smb_vfs_call_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);
+NTSTATUS smb_vfs_call_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);
+struct tevent_req *smb_vfs_call_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);
+NTSTATUS smb_vfs_call_offload_write_recv(struct vfs_handle_struct *handle,
+					 struct tevent_req *req,
+					 off_t *copied);
+NTSTATUS smb_vfs_call_fget_compression(struct vfs_handle_struct *handle,
+				      TALLOC_CTX *mem_ctx,
+				      struct files_struct *fsp,
+				      uint16_t *_compression_fmt);
+NTSTATUS smb_vfs_call_set_compression(struct vfs_handle_struct *handle,
+				      TALLOC_CTX *mem_ctx,
+				      struct files_struct *fsp,
+				      uint16_t compression_fmt);
+NTSTATUS smb_vfs_call_snap_check_path(vfs_handle_struct *handle,
+				      TALLOC_CTX *mem_ctx,
+				      const char *service_path,
+				      char **base_volume);
+NTSTATUS smb_vfs_call_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);
+NTSTATUS smb_vfs_call_snap_delete(struct vfs_handle_struct *handle,
+				  TALLOC_CTX *mem_ctx,
+				  char *base_path,
+				  char *snap_path);
+NTSTATUS smb_vfs_call_fget_nt_acl(struct vfs_handle_struct *handle,
+				  struct files_struct *fsp,
+				  uint32_t security_info,
+				  TALLOC_CTX *mem_ctx,
+				  struct security_descriptor **ppdesc);
+NTSTATUS smb_vfs_call_get_nt_acl_at(struct vfs_handle_struct *handle,
+				struct files_struct *dirfsp,
+				const struct smb_filename *smb_fname,
+				uint32_t security_info,
+				TALLOC_CTX *mem_ctx,
+				struct security_descriptor **ppdesc);
+NTSTATUS smb_vfs_call_fset_nt_acl(struct vfs_handle_struct *handle,
+				  struct files_struct *fsp,
+				  uint32_t security_info_sent,
+				  const struct security_descriptor *psd);
+NTSTATUS smb_vfs_call_audit_file(struct vfs_handle_struct *handle,
+				 struct smb_filename *file,
+				 struct security_acl *sacl,
+				 uint32_t access_requested,
+				 uint32_t access_denied);
+int smb_vfs_call_chmod_acl(struct vfs_handle_struct *handle,
+				const struct smb_filename *file,
+				mode_t mode);
+SMB_ACL_T smb_vfs_call_sys_acl_get_fd(struct vfs_handle_struct *handle,
+				      struct files_struct *fsp,
+				      SMB_ACL_TYPE_T type,
+				      TALLOC_CTX *mem_ctx);
+int smb_vfs_call_sys_acl_blob_get_fd(struct vfs_handle_struct *handle,
+				     struct files_struct *fsp, 	
+				     TALLOC_CTX *mem_ctx,
+				     char **blob_description,
+				     DATA_BLOB *blob);
+int smb_vfs_call_sys_acl_set_fd(struct vfs_handle_struct *handle,
+				struct files_struct *fsp,
+				SMB_ACL_TYPE_T type,
+				SMB_ACL_T theacl);
+int smb_vfs_call_sys_acl_delete_def_fd(struct vfs_handle_struct *handle,
+				struct files_struct *fsp);
+struct tevent_req *smb_vfs_call_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);
+ssize_t smb_vfs_call_getxattrat_recv(struct tevent_req *req,
+				     struct vfs_aio_state *aio_state,
+				     TALLOC_CTX *mem_ctx,
+				     uint8_t **xattr_value);
+ssize_t smb_vfs_call_fgetxattr(struct vfs_handle_struct *handle,
+			       struct files_struct *fsp, const char *name,
+			       void *value, size_t size);
+ssize_t smb_vfs_call_flistxattr(struct vfs_handle_struct *handle,
+				struct files_struct *fsp, char *list,
+				size_t size);
+int smb_vfs_call_fremovexattr(struct vfs_handle_struct *handle,
+			      struct files_struct *fsp, const char *name);
+int smb_vfs_call_lsetxattr(struct vfs_handle_struct *handle, const char *path,
+			   const char *name, const void *value, size_t size,
+			   int flags);
+int smb_vfs_call_fsetxattr(struct vfs_handle_struct *handle,
+			   struct files_struct *fsp, const char *name,
+			   const void *value, size_t size, int flags);
+bool smb_vfs_call_aio_force(struct vfs_handle_struct *handle,
+			    struct files_struct *fsp);
+NTSTATUS smb_vfs_call_durable_cookie(struct vfs_handle_struct *handle,
+				     struct files_struct *fsp,
+				     TALLOC_CTX *mem_ctx,
+				     DATA_BLOB *cookie);
+NTSTATUS smb_vfs_call_durable_disconnect(struct vfs_handle_struct *handle,
+					 struct files_struct *fsp,
+					 const DATA_BLOB old_cookie,
+					 TALLOC_CTX *mem_ctx,
+					 DATA_BLOB *new_cookie);
+NTSTATUS smb_vfs_call_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);
+NTSTATUS smb_vfs_call_freaddir_attr(struct vfs_handle_struct *handle,
+				    struct files_struct *fsp,
+				    TALLOC_CTX *mem_ctx,
+				    struct readdir_attr_data **attr_data);
+
+NTSTATUS smb_register_vfs(int version, const char *name,
+			  const struct vfs_fn_pointers *fns);
+void *vfs_add_fsp_extension_notype(vfs_handle_struct *handle,
+				   files_struct *fsp, size_t ext_size,
+				   void (*destroy_fn)(void *p_data));
+void vfs_remove_fsp_extension(vfs_handle_struct *handle, files_struct *fsp);
+void vfs_remove_all_fsp_extensions(struct files_struct *fsp);
+void *vfs_memctx_fsp_extension(vfs_handle_struct *handle,
+			       const struct files_struct *fsp);
+void *vfs_fetch_fsp_extension(vfs_handle_struct *handle, const struct files_struct *fsp);
+
+void smb_vfs_assert_all_fns(const struct vfs_fn_pointers* fns,
+			    const char *module);
+
+/*
+ * Helper functions from source3/modules/vfs_not_implemented.c
+ */
+int vfs_not_implemented_connect(
+			vfs_handle_struct *handle,
+			const char *service,
+			const char *user);
+void vfs_not_implemented_disconnect(vfs_handle_struct *handle);
+uint64_t vfs_not_implemented_disk_free(vfs_handle_struct *handle,
+				const struct smb_filename *smb_fname,
+				uint64_t *bsize,
+				uint64_t *dfree,
+				uint64_t *dsize);
+int vfs_not_implemented_get_quota(vfs_handle_struct *handle,
+				const struct smb_filename *smb_fname,
+				enum SMB_QUOTA_TYPE qtype,
+				unid_t id,
+				SMB_DISK_QUOTA *dq);
+int vfs_not_implemented_set_quota(vfs_handle_struct *handle,
+				  enum SMB_QUOTA_TYPE qtype,
+				  unid_t id, SMB_DISK_QUOTA *dq);
+int vfs_not_implemented_get_shadow_copy_data(vfs_handle_struct *handle,
+				files_struct *fsp,
+				struct shadow_copy_data *shadow_copy_data,
+				bool labels);
+int vfs_not_implemented_statvfs(struct vfs_handle_struct *handle,
+				const struct smb_filename *smb_fname,
+				struct vfs_statvfs_struct *statbuf);
+uint32_t vfs_not_implemented_fs_capabilities(struct vfs_handle_struct *handle,
+				enum timestamp_set_resolution *p_ts_res);
+NTSTATUS vfs_not_implemented_get_dfs_referrals(struct vfs_handle_struct *handle,
+					       struct dfs_GetDFSReferral *r);
+NTSTATUS vfs_not_implemented_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);
+NTSTATUS vfs_not_implemented_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);
+NTSTATUS vfs_not_implemented_snap_check_path(struct vfs_handle_struct *handle,
+				TALLOC_CTX *mem_ctx,
+				const char *service_path,
+				char **base_volume);
+NTSTATUS vfs_not_implemented_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);
+NTSTATUS vfs_not_implemented_snap_delete(struct vfs_handle_struct *handle,
+					 TALLOC_CTX *mem_ctx,
+					 char *base_path,
+					 char *snap_path);
+DIR *vfs_not_implemented_fdopendir(vfs_handle_struct *handle, files_struct *fsp,
+				   const char *mask, uint32_t attr);
+struct dirent *vfs_not_implemented_readdir(vfs_handle_struct *handle,
+					   struct files_struct *dirfsp,
+					   DIR *dirp,
+					   SMB_STRUCT_STAT *sbuf);
+void vfs_not_implemented_seekdir(vfs_handle_struct *handle, DIR *dirp, long offset);
+long vfs_not_implemented_telldir(vfs_handle_struct *handle, DIR *dirp);
+void vfs_not_implemented_rewind_dir(vfs_handle_struct *handle, DIR *dirp);
+int vfs_not_implemented_mkdirat(vfs_handle_struct *handle,
+		struct files_struct *dirfsp,
+		const struct smb_filename *smb_fname,
+		mode_t mode);
+int vfs_not_implemented_closedir(vfs_handle_struct *handle, DIR *dir);
+int vfs_not_implemented_open(vfs_handle_struct *handle,
+			     struct smb_filename *smb_fname,
+			     files_struct *fsp, int flags, mode_t mode);
+int vfs_not_implemented_openat(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);
+NTSTATUS vfs_not_implemented_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);
+int vfs_not_implemented_close_fn(vfs_handle_struct *handle, files_struct *fsp);
+ssize_t vfs_not_implemented_pread(vfs_handle_struct *handle, files_struct *fsp,
+				  void *data, size_t n, off_t offset);
+struct tevent_req *vfs_not_implemented_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);
+ssize_t vfs_not_implemented_pread_recv(struct tevent_req *req,
+				       struct vfs_aio_state *vfs_aio_state);
+ssize_t vfs_not_implemented_pwrite(vfs_handle_struct *handle, files_struct *fsp,
+				   const void *data, size_t n, off_t offset);
+struct tevent_req *vfs_not_implemented_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);
+ssize_t vfs_not_implemented_pwrite_recv(struct tevent_req *req,
+				struct vfs_aio_state *vfs_aio_state);
+off_t vfs_not_implemented_lseek(vfs_handle_struct *handle, files_struct *fsp,
+			off_t offset, int whence);
+ssize_t vfs_not_implemented_sendfile(vfs_handle_struct *handle, int tofd,
+				     files_struct *fromfsp, const DATA_BLOB *hdr,
+				     off_t offset, size_t n);
+ssize_t vfs_not_implemented_recvfile(vfs_handle_struct *handle, int fromfd,
+				     files_struct *tofsp, off_t offset, size_t n);
+int vfs_not_implemented_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);
+struct tevent_req *vfs_not_implemented_fsync_send(struct vfs_handle_struct *handle,
+						  TALLOC_CTX *mem_ctx,
+						  struct tevent_context *ev,
+						  struct files_struct *fsp);
+int vfs_not_implemented_fsync_recv(struct tevent_req *req,
+				   struct vfs_aio_state *vfs_aio_state);
+int vfs_not_implemented_stat(vfs_handle_struct *handle, struct smb_filename *smb_fname);
+int vfs_not_implemented_fstat(vfs_handle_struct *handle, files_struct *fsp,
+			SMB_STRUCT_STAT *sbuf);
+int vfs_not_implemented_lstat(vfs_handle_struct *handle,
+			      struct smb_filename *smb_fname);
+int vfs_not_implemented_fstatat(
+	struct vfs_handle_struct *handle,
+	const struct files_struct *dirfsp,
+	const struct smb_filename *smb_fname,
+	SMB_STRUCT_STAT *sbuf,
+	int flags);
+uint64_t vfs_not_implemented_get_alloc_size(struct vfs_handle_struct *handle,
+					    struct files_struct *fsp,
+					    const SMB_STRUCT_STAT *sbuf);
+int vfs_not_implemented_unlinkat(vfs_handle_struct *handle,
+				struct files_struct *dirfsp,
+				const struct smb_filename *smb_fname,
+				int flags);
+int vfs_not_implemented_fchmod(vfs_handle_struct *handle, files_struct *fsp,
+			       mode_t mode);
+int vfs_not_implemented_fchown(vfs_handle_struct *handle, files_struct *fsp,
+			       uid_t uid, gid_t gid);
+int vfs_not_implemented_lchown(vfs_handle_struct *handle,
+			       const struct smb_filename *smb_fname,
+			       uid_t uid,
+			       gid_t gid);
+int vfs_not_implemented_chdir(vfs_handle_struct *handle,
+			      const struct smb_filename *smb_fname);
+struct smb_filename *vfs_not_implemented_getwd(vfs_handle_struct *handle,
+					       TALLOC_CTX *ctx);
+int vfs_not_implemented_ntimes(vfs_handle_struct *handle,
+			       const struct smb_filename *smb_fname,
+			       struct smb_file_time *ft);
+int vfs_not_implemented_fntimes(vfs_handle_struct *handle,
+				files_struct *fsp,
+				struct smb_file_time *ft);
+int vfs_not_implemented_ftruncate(vfs_handle_struct *handle, files_struct *fsp,
+				  off_t offset);
+int vfs_not_implemented_fallocate(vfs_handle_struct *handle, files_struct *fsp,
+				  uint32_t mode, off_t offset, off_t len);
+bool vfs_not_implemented_lock(vfs_handle_struct *handle, files_struct *fsp, int op,
+			      off_t offset, off_t count, int type);
+int vfs_not_implemented_filesystem_sharemode(struct vfs_handle_struct *handle,
+					     struct files_struct *fsp,
+					     uint32_t share_access,
+					     uint32_t access_mask);
+int vfs_not_implemented_fcntl(struct vfs_handle_struct *handle,
+			      struct files_struct *fsp, int cmd, va_list cmd_arg);
+int vfs_not_implemented_linux_setlease(struct vfs_handle_struct *handle,
+				       struct files_struct *fsp, int leasetype);
+bool vfs_not_implemented_getlock(vfs_handle_struct *handle, files_struct *fsp,
+				 off_t *poffset, off_t *pcount, int *ptype,
+				 pid_t *ppid);
+int vfs_not_implemented_symlinkat(vfs_handle_struct *handle,
+				const struct smb_filename *link_contents,
+				struct files_struct *dirfsp,
+				const struct smb_filename *new_smb_fname);
+int vfs_not_implemented_vfs_readlinkat(vfs_handle_struct *handle,
+			const struct files_struct *dirfsp,
+			const struct smb_filename *smb_fname,
+			char *buf,
+			size_t bufsiz);
+int vfs_not_implemented_linkat(vfs_handle_struct *handle,
+			struct files_struct *srcfsp,
+			const struct smb_filename *old_smb_fname,
+			struct files_struct *dstfsp,
+			const struct smb_filename *new_smb_fname,
+			int flags);
+int vfs_not_implemented_mknodat(vfs_handle_struct *handle,
+			struct files_struct *dirfsp,
+			const struct smb_filename *smb_fname,
+			mode_t mode,
+			SMB_DEV_T dev);
+struct smb_filename *vfs_not_implemented_realpath(vfs_handle_struct *handle,
+						  TALLOC_CTX *ctx,
+						  const struct smb_filename *smb_fname);
+int vfs_not_implemented_chflags(vfs_handle_struct *handle,
+				const struct smb_filename *smb_fname,
+				uint flags);
+int vfs_not_implemented_fchflags(vfs_handle_struct *handle,
+				struct files_struct *fst,
+				uint flags);
+struct file_id vfs_not_implemented_file_id_create(vfs_handle_struct *handle,
+						  const SMB_STRUCT_STAT *sbuf);
+uint64_t vfs_not_implemented_fs_file_id(vfs_handle_struct *handle,
+					const SMB_STRUCT_STAT *sbuf);
+struct tevent_req *vfs_not_implemented_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);
+NTSTATUS vfs_not_implemented_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);
+struct tevent_req *vfs_not_implemented_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);
+NTSTATUS vfs_not_implemented_offload_write_recv(struct vfs_handle_struct *handle,
+						struct tevent_req *req,
+						off_t *copied);
+NTSTATUS vfs_not_implemented_fget_compression(struct vfs_handle_struct *handle,
+					     TALLOC_CTX *mem_ctx,
+					     struct files_struct *fsp,
+					     uint16_t *_compression_fmt);
+NTSTATUS vfs_not_implemented_set_compression(struct vfs_handle_struct *handle,
+					     TALLOC_CTX *mem_ctx,
+					     struct files_struct *fsp,
+					     uint16_t compression_fmt);
+NTSTATUS vfs_not_implemented_fstreaminfo(struct vfs_handle_struct *handle,
+					 struct files_struct *fsp,
+					 TALLOC_CTX *mem_ctx,
+					 unsigned int *num_streams,
+					 struct stream_struct **streams);
+NTSTATUS vfs_not_implemented_get_real_filename(
+	struct vfs_handle_struct *handle,
+	const struct smb_filename *path,
+	const char *name,
+	TALLOC_CTX *mem_ctx,
+	char **found_name);
+NTSTATUS vfs_not_implemented_get_real_filename_at(
+	struct vfs_handle_struct *handle,
+	struct files_struct *dirfsp,
+	const char *name,
+	TALLOC_CTX *mem_ctx,
+	char **found_name);
+const char *vfs_not_implemented_connectpath(struct vfs_handle_struct *handle,
+					    const struct smb_filename *smb_fname);
+NTSTATUS vfs_not_implemented_brl_lock_windows(struct vfs_handle_struct *handle,
+					      struct byte_range_lock *br_lck,
+					      struct lock_struct *plock);
+bool vfs_not_implemented_brl_unlock_windows(struct vfs_handle_struct *handle,
+					    struct byte_range_lock *br_lck,
+					    const struct lock_struct *plock);
+bool vfs_not_implemented_strict_lock_check(struct vfs_handle_struct *handle,
+					   struct files_struct *fsp,
+					   struct lock_struct *plock);
+NTSTATUS vfs_not_implemented_translate_name(struct vfs_handle_struct *handle,
+					    const char *mapped_name,
+					    enum vfs_translate_direction direction,
+					    TALLOC_CTX *mem_ctx, char **pmapped_name);
+NTSTATUS vfs_not_implemented_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);
+NTSTATUS vfs_not_implemented_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);
+NTSTATUS vfs_not_implemented_freaddir_attr(struct vfs_handle_struct *handle,
+					   struct files_struct *dirfsp,
+					   TALLOC_CTX *mem_ctx,
+					   struct readdir_attr_data **pattr_data);
+struct tevent_req *vfs_not_implemented_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);
+NTSTATUS vfs_not_implemented_get_dos_attributes_recv(
+			struct tevent_req *req,
+			struct vfs_aio_state *aio_state,
+			uint32_t *dosmode);
+NTSTATUS vfs_not_implemented_fget_dos_attributes(struct vfs_handle_struct *handle,
+						 struct files_struct *fsp,
+						 uint32_t *dosmode);
+NTSTATUS vfs_not_implemented_set_dos_attributes(struct vfs_handle_struct *handle,
+						const struct smb_filename *smb_fname,
+						uint32_t dosmode);
+NTSTATUS vfs_not_implemented_fset_dos_attributes(struct vfs_handle_struct *handle,
+						 struct files_struct *fsp,
+						 uint32_t dosmode);
+NTSTATUS vfs_not_implemented_fget_nt_acl(vfs_handle_struct *handle, files_struct *fsp,
+					 uint32_t security_info,
+					 TALLOC_CTX *mem_ctx,
+					 struct security_descriptor **ppdesc);
+NTSTATUS vfs_not_implemented_get_nt_acl_at(vfs_handle_struct *handle,
+			struct files_struct *dirfsp,
+			const struct smb_filename *smb_fname,
+			uint32_t security_info,
+			TALLOC_CTX *mem_ctx,
+			struct security_descriptor **ppdesc);
+NTSTATUS vfs_not_implemented_fset_nt_acl(vfs_handle_struct *handle, files_struct *fsp,
+					 uint32_t security_info_sent,
+					 const struct security_descriptor *psd);
+SMB_ACL_T vfs_not_implemented_sys_acl_get_fd(vfs_handle_struct *handle,
+					     files_struct *fsp,
+					     SMB_ACL_TYPE_T type,
+					     TALLOC_CTX *mem_ctx);
+int vfs_not_implemented_sys_acl_blob_get_fd(vfs_handle_struct *handle,
+				files_struct *fsp, TALLOC_CTX *mem_ctx,
+				char **blob_description, DATA_BLOB *blob);
+int vfs_not_implemented_sys_acl_set_fd(vfs_handle_struct *handle,
+				       struct files_struct *fsp,
+				       SMB_ACL_TYPE_T type,
+				       SMB_ACL_T theacl);
+int vfs_not_implemented_sys_acl_delete_def_fd(vfs_handle_struct *handle,
+					files_struct *fsp);
+struct tevent_req *vfs_not_implemented_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);
+ssize_t vfs_not_implemented_getxattrat_recv(struct tevent_req *req,
+				    struct vfs_aio_state *aio_state,
+				    TALLOC_CTX *mem_ctx,
+				    uint8_t **xattr_value);
+ssize_t vfs_not_implemented_fgetxattr(vfs_handle_struct *handle,
+			      struct files_struct *fsp, const char *name,
+			      void *value, size_t size);
+ssize_t vfs_not_implemented_listxattr(vfs_handle_struct *handle,
+				      const struct smb_filename *smb_fname,
+				      char *list,
+				      size_t size);
+ssize_t vfs_not_implemented_flistxattr(vfs_handle_struct *handle,
+				       struct files_struct *fsp, char *list,
+				       size_t size);
+int vfs_not_implemented_fremovexattr(vfs_handle_struct *handle,
+				     struct files_struct *fsp, const char *name);
+int vfs_not_implemented_setxattr(vfs_handle_struct *handle,
+				 const struct smb_filename *smb_fname,
+				 const char *name,
+				 const void *value,
+				 size_t size,
+				 int flags);
+int vfs_not_implemented_fsetxattr(vfs_handle_struct *handle, struct files_struct *fsp,
+				  const char *name, const void *value, size_t size,
+				  int flags);
+bool vfs_not_implemented_aio_force(struct vfs_handle_struct *handle,
+				   struct files_struct *fsp);
+NTSTATUS vfs_not_implemented_audit_file(struct vfs_handle_struct *handle,
+					struct smb_filename *file,
+					struct security_acl *sacl,
+					uint32_t access_requested,
+					uint32_t access_denied);
+NTSTATUS vfs_not_implemented_durable_cookie(struct vfs_handle_struct *handle,
+					    struct files_struct *fsp,
+					    TALLOC_CTX *mem_ctx,
+					    DATA_BLOB *cookie);
+NTSTATUS vfs_not_implemented_durable_disconnect(struct vfs_handle_struct *handle,
+						struct files_struct *fsp,
+						const DATA_BLOB old_cookie,
+						TALLOC_CTX *mem_ctx,
+						DATA_BLOB *new_cookie);
+NTSTATUS vfs_not_implemented_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);
+#endif /* _VFS_H */