* dir.cc (readdir_worker): Drop dir parameter from call to

readdir_get_ino.
	* fhandler.h (fhandler_disk_file::readdir_helper): Switch file name
	parameter to PUNICODE_STRING.
	* fhandler_disk_file.cc: Drop including ntdef.h.
	(class __DIR_mounts): Store mount points in UNICODE.  Additionally
	store cygdrive prefix in unicode here.  Change methods accordingly.
	(__DIR_mounts::eval_ino): Call new stat_worker instead of lstat64.
	(__DIR_mounts::~__DIR_mounts): New destructor to free UNICODE buffers.
	(path_conv::ndisk_links): Rewrite using native NT functions.
	(fhandler_base::fstat_by_handle): Use NAME_MAX instead of CYG_MAX_PATH.
	Always set pfvi->VolumeSerialNumber to non-0.  Remove last resort
	code.
	(fhandler_base::fstat_by_name): Rewrite using native NT functions.
	(fhandler_base::fstat_fs): Always call fstat_by_name if fstat_by_handle
	fails.
	(fhandler_base::fstat_helper): Rely on dwVolumeSerialNumber.
	(fhandler_disk_file::facl): Call fstat_by_name if fstat_by_handle fails.
	(DIR_BUF_SIZE): Define using NAME_MAX instead of CYG_MAX_PATH.
	(__DIR_cache): Remove __name.
	(d_dirname): Remove.
	(fhandler_disk_file::opendir): Drop pathname length check.
	Remove outdated comment.  Use get_name method instead of accessing
	pc.normalized_path directly.
	(readdir_get_ino): Drop unused dir parameter.  Accomodate throughout.
	Allocate fname dynamically.  Call new stat_worker instead of lstat64.
	Call NtOpenFile instead of CreateFile.  Call NtClose instead of
	CloseHandle.
	(fhandler_disk_file::readdir_helper): Use native NT functions.
	Check for volume mount points and use correct inode number.
	(fhandler_disk_file::readdir): Simplify slightly.
	Use get_name instead of pc.normalized_path.
	(fhandler_disk_file::rewinddir): Use RtlInitUnicodeString.
	(fhandler_cygdrive::fstat): Ignore floppy drives.  Set st_nlink
	correctly.
	(fhandler_cygdrive::readdir): Ignore floppy drives.
	* fhandler_netdrive.cc (fhandler_netdrive::readdir): Accommodate
	change to readdir_get_ino.
	* fhandler_proc.cc (PROC_DIR_COUNT): Define.
	(fhandler_proc::fstat): Evaluate correct link count for /proc.
	* ntdll.h (struct _FILE_DIRECTORY_INFORMATION): Define.
	(NtFsControlFile): Declare.
	(RtlAppendUnicodeToString): Declare.
	(RtlAppendUnicodeStringToString): Declare.
	(RtlCompareUnicodeString): Declare.
	(RtlCopyUnicodeString): Declare.
	(RtlCreateUnicodeStringFromAsciiz): Declare.
	(RtlEqualUnicodeString): Declare.
	(RtlFreeUnicodeString): Declare.
	(RtlInitEmptyUnicodeString): Declare.
	(RtlSecondsSince1970ToTime): Declare.
	(RtlInitEmptyUnicodeString): Define as inline function.
	(RtlInitCountedUnicodeString): Define as inline function.
	* path.cc (path_conv::check): New method with PUNICODE_STRING as path,
	preliminary implementation.
	(mount_info::get_mounts_here): Change to create UNICODE_STRINGs.
	Also copy cygpath prefix into UNICODE_STRING.
	(is_floppy): Drop 9x consideration.
	* path.h: Drop including ntdef.h.
	(path_conv::check): Add declaration.
	(path_conv::path_conv): Add constructor for UNICODE_STRING paths.
	* shared_info.h (mount_info::get_mounts_here): Change declaration.
	* syscalls.cc: Drop forward declaration of stat_worker.
	(stat_worke): Take path_conv as parameter.  Drop nofollow flag.
	(stat64): Create matching path_conv and call stat_worker with it.
	(lstat64): Ditto.
	* winsup.h: Include ntdef.h.
	(stat_worker): Declare.
	(readdir_get_ino): Change declaration.

winsup/cygwin/fhandler.h

@@ -671,7 +671,7 @@ class fhandler_dev_tape: public fhandler_dev_raw
 
 class fhandler_disk_file: public fhandler_base
 {
-  int readdir_helper (DIR *, dirent *, DWORD, DWORD, char *) __attribute__ ((regparm (3)));
+  int readdir_helper (DIR *, dirent *, DWORD, DWORD, PUNICODE_STRING fname) __attribute__ ((regparm (3)));
 
  public:
   fhandler_disk_file ();