gp: Fix startup scripts add not always set runonce

[Samba.git] / source3 / include / vfs.h

/* 
   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()
 * Change to Version 48 - will ship with 4.18
 * Version 48 - Add cached_dos_attributes to struct stat_ex
 * Version 48 - Add dirfsp to connectpath_fn()
 */

#define SMB_VFS_INTERFACE_VERSION 48

/*
    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

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 files_struct *dirfsp,
                                      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"

struct smb_vfs_deny_state {
        struct smb_vfs_deny_state *parent;
        const char *location;
};

void smb_vfs_assert_allowed(void);

void _smb_vfs_deny_push(struct smb_vfs_deny_state *state, const char *location);
#define smb_vfs_deny_push(__state) _smb_vfs_deny_push(__state, __location__);
void _smb_vfs_deny_pop(struct smb_vfs_deny_state *state, const char *location);
#define smb_vfs_deny_pop(__state) _smb_vfs_deny_pop(__state, __location__);

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 files_struct *dirfsp,
                                 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 files_struct *dirfsp,
        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 */