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wow64: Add support for file system redirection.

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Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Alexandre Julliard 2021-07-28 18:28:16 +02:00
parent fdd4594554
commit 90e1907ded
3 changed files with 189 additions and 9 deletions
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184
dlls/wow64/file.c
View file

@ -26,12 +26,172 @@
#include "winbase.h"
#include "winnt.h"
#include "winternl.h"
#include "winioctl.h"
#include "wow64_private.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(wow);
static FILE_OBJECTID_BUFFER windir_id, sysdir_id;
static inline NTSTATUS get_file_id( HANDLE handle, FILE_OBJECTID_BUFFER *id )
{
IO_STATUS_BLOCK io;
return NtFsControlFile( handle, 0, NULL, NULL, &io, FSCTL_GET_OBJECT_ID, NULL, 0, id, sizeof(*id) );
}
static inline ULONG starts_with_path( const WCHAR *name, ULONG name_len, const WCHAR *prefix )
{
ULONG len = wcslen( prefix );
if (name_len < len) return 0;
if (wcsnicmp( name, prefix, len )) return 0;
if (name_len > len && name[len] != '\\') return 0;
return len;
}
/***********************************************************************
* init_file_redirects
*/
void init_file_redirects(void)
{
OBJECT_ATTRIBUTES attr;
UNICODE_STRING nameW;
IO_STATUS_BLOCK io;
HANDLE handle;
InitializeObjectAttributes( &attr, &nameW, OBJ_CASE_INSENSITIVE, 0, NULL );
RtlInitUnicodeString( &nameW, L"\\??\\C:\\windows" );
if (!NtOpenFile( &handle, SYNCHRONIZE | FILE_LIST_DIRECTORY, &attr, &io,
FILE_SHARE_READ, FILE_SYNCHRONOUS_IO_NONALERT |
FILE_OPEN_FOR_BACKUP_INTENT | FILE_DIRECTORY_FILE ))
{
get_file_id( handle, &windir_id );
NtClose( handle );
}
RtlInitUnicodeString( &nameW, L"\\??\\C:\\windows\\system32" );
if (!NtOpenFile( &handle, SYNCHRONIZE | FILE_LIST_DIRECTORY, &attr, &io,
FILE_SHARE_READ, FILE_SYNCHRONOUS_IO_NONALERT |
FILE_OPEN_FOR_BACKUP_INTENT | FILE_DIRECTORY_FILE ))
{
get_file_id( handle, &sysdir_id );
NtClose( handle );
}
}
/***********************************************************************
* replace_path
*
* Helper for get_file_redirect().
*/
static BOOL replace_path( OBJECT_ATTRIBUTES *attr, ULONG prefix_len, const WCHAR *match,
const WCHAR *replace_dir, const WCHAR *replace_name )
{
const WCHAR *name = attr->ObjectName->Buffer;
ULONG match_len, replace_len, len = attr->ObjectName->Length / sizeof(WCHAR);
UNICODE_STRING str;
WCHAR *p;
if (!starts_with_path( name + prefix_len, len - prefix_len, match )) return FALSE;
match_len = wcslen( match );
replace_len = wcslen( replace_dir );
if (replace_name) replace_len += wcslen( replace_name );
str.Length = (len + replace_len - match_len) * sizeof(WCHAR);
str.MaximumLength = str.Length + sizeof(WCHAR);
if (!(p = str.Buffer = Wow64AllocateTemp( str.MaximumLength ))) return FALSE;
memcpy( p, name, prefix_len * sizeof(WCHAR) );
p += prefix_len;
wcscpy( p, replace_dir );
p += wcslen(p);
if (replace_name)
{
wcscpy( p, replace_name );
p += wcslen(p);
}
name += prefix_len + match_len;
len -= prefix_len + match_len;
memcpy( p, name, len * sizeof(WCHAR) );
p[len] = 0;
*attr->ObjectName = str;
return TRUE;
}
/***********************************************************************
* get_file_redirect
*/
BOOL get_file_redirect( OBJECT_ATTRIBUTES *attr )
{
static const WCHAR * const no_redirect[] =
{
L"system32\\catroot", L"system32\\catroot2", L"system32\\driversstore",
L"system32\\drivers\\etc", L"system32\\logfiles", L"system32\\spool"
};
static const WCHAR windirW[] = L"\\??\\C:\\windows\\";
const WCHAR *name = attr->ObjectName->Buffer;
unsigned int i, prefix_len = 0, len = attr->ObjectName->Length / sizeof(WCHAR);
const WCHAR *syswow64dir;
UNICODE_STRING redir;
if (!len) return FALSE;
if (!attr->RootDirectory)
{
prefix_len = wcslen( windirW );
if (len < prefix_len || wcsnicmp( name, windirW, prefix_len )) return FALSE;
}
else
{
FILE_OBJECTID_BUFFER id;
if (get_file_id( attr->RootDirectory, &id )) return FALSE;
if (memcmp( &id, &windir_id, sizeof(id) ))
{
if (memcmp( &id, &sysdir_id, sizeof(id) )) return FALSE;
if (NtCurrentTeb()->TlsSlots[WOW64_TLS_FILESYSREDIR]) return FALSE;
if (name[0] == '\\') return FALSE;
/* only check for paths that should NOT be redirected */
for (i = 0; i < ARRAY_SIZE( no_redirect ); i++)
if (starts_with_path( name, len, no_redirect[i] + 9 /* "system32\\" */)) return FALSE;
/* redirect everything else */
syswow64dir = get_machine_wow64_dir( current_machine );
redir.Length = (wcslen(syswow64dir) + 1 + len) * sizeof(WCHAR);
redir.MaximumLength = redir.Length + sizeof(WCHAR);
if (!(redir.Buffer = Wow64AllocateTemp( redir.MaximumLength ))) return FALSE;
wcscpy( redir.Buffer, syswow64dir );
wcscat( redir.Buffer, L"\\" );
memcpy( redir.Buffer + wcslen(redir.Buffer), name, len * sizeof(WCHAR) );
redir.Buffer[redir.Length / sizeof(WCHAR)] = 0;
attr->RootDirectory = 0;
*attr->ObjectName = redir;
return TRUE;
}
}
/* sysnative is redirected even when redirection is disabled */
if (replace_path( attr, prefix_len, L"sysnative", L"system32", NULL )) return TRUE;
if (NtCurrentTeb()->TlsSlots[WOW64_TLS_FILESYSREDIR]) return FALSE;
for (i = 0; i < ARRAY_SIZE( no_redirect ); i++)
if (starts_with_path( name + prefix_len, len - prefix_len, no_redirect[i] )) return FALSE;
syswow64dir = get_machine_wow64_dir( current_machine ) + wcslen( windirW );
if (replace_path( attr, prefix_len, L"system32", syswow64dir, NULL )) return TRUE;
if (replace_path( attr, prefix_len, L"regedit.exe", syswow64dir, L"\\regedit.exe" )) return TRUE;
return FALSE;
}
/**********************************************************************
* wow64_NtCancelIoFile
*/
@ -90,7 +250,7 @@ NTSTATUS WINAPI wow64_NtCreateFile( UINT *args )
NTSTATUS status;
*handle_ptr = 0;
status = NtCreateFile( &handle, access, objattr_32to64( &attr, attr32 ),
status = NtCreateFile( &handle, access, objattr_32to64_redirect( &attr, attr32 ),
iosb_32to64( &io, io32 ), alloc_size, attributes,
sharing, disposition, options, ea_buffer, ea_length );
put_handle( handle_ptr, handle );
@ -188,7 +348,7 @@ NTSTATUS WINAPI wow64_NtDeleteFile( UINT *args )
struct object_attr64 attr;
return NtDeleteFile( objattr_32to64( &attr, attr32 ));
return NtDeleteFile( objattr_32to64_redirect( &attr, attr32 ));
}
@ -279,7 +439,7 @@ NTSTATUS WINAPI wow64_NtOpenFile( UINT *args )
NTSTATUS status;
*handle_ptr = 0;
status = NtOpenFile( &handle, access, objattr_32to64( &attr, attr32 ),
status = NtOpenFile( &handle, access, objattr_32to64_redirect( &attr, attr32 ),
iosb_32to64( &io, io32 ), sharing, options );
put_handle( handle_ptr, handle );
put_iosb( io32, &io );
@ -297,7 +457,7 @@ NTSTATUS WINAPI wow64_NtQueryAttributesFile( UINT *args )
struct object_attr64 attr;
return NtQueryAttributesFile( objattr_32to64( &attr, attr32 ), info );
return NtQueryAttributesFile( objattr_32to64_redirect( &attr, attr32 ), info );
}
@ -365,7 +525,7 @@ NTSTATUS WINAPI wow64_NtQueryFullAttributesFile( UINT *args )
struct object_attr64 attr;
return NtQueryFullAttributesFile( objattr_32to64( &attr, attr32 ), info );
return NtQueryFullAttributesFile( objattr_32to64_redirect( &attr, attr32 ), info );
}
@ -564,16 +724,22 @@ NTSTATUS WINAPI wow64_NtSetInformationFile( UINT *args )
case FileLinkInformation: /* FILE_LINK_INFORMATION */
if (len >= sizeof(FILE_RENAME_INFORMATION32))
{
OBJECT_ATTRIBUTES attr;
UNICODE_STRING name;
FILE_RENAME_INFORMATION32 *info32 = ptr;
FILE_RENAME_INFORMATION *info;
ULONG size;
size = offsetof( FILE_RENAME_INFORMATION, FileName[info32->FileNameLength/sizeof(WCHAR)] );
name.Buffer = info32->FileName;
name.Length = info32->FileNameLength;
InitializeObjectAttributes( &attr, &name, 0, LongToHandle( info32->RootDirectory ), 0 );
get_file_redirect( &attr );
size = offsetof( FILE_RENAME_INFORMATION, FileName[name.Length/sizeof(WCHAR)] );
info = Wow64AllocateTemp( size );
info->ReplaceIfExists = info32->ReplaceIfExists;
info->RootDirectory = LongToHandle( info32->RootDirectory );
info->FileNameLength = info32->FileNameLength;
memcpy( info->FileName, info32->FileName, info->FileNameLength );
info->RootDirectory = attr.RootDirectory;
info->FileNameLength = name.Length;
memcpy( info->FileName, name.Buffer, info->FileNameLength );
status = NtSetInformationFile( handle, iosb_32to64( &io, io32 ), info, size, class );
}
else status = io.Status = STATUS_INVALID_PARAMETER_3;

2
dlls/wow64/syscall.c
View file

@ -379,6 +379,8 @@ static void process_init(void)
load_cpu_dll();
init_file_redirects();
#undef GET_PTR
}

12
dlls/wow64/wow64_private.h
View file

@ -31,6 +31,9 @@ ALL_SYSCALLS
void * WINAPI Wow64AllocateTemp( SIZE_T size ) DECLSPEC_HIDDEN;
void WINAPI Wow64ApcRoutine( ULONG_PTR arg1, ULONG_PTR arg2, ULONG_PTR arg3, CONTEXT *context ) DECLSPEC_HIDDEN;
extern void init_file_redirects(void) DECLSPEC_HIDDEN;
extern BOOL get_file_redirect( OBJECT_ATTRIBUTES *attr ) DECLSPEC_HIDDEN;
extern USHORT native_machine DECLSPEC_HIDDEN;
extern USHORT current_machine DECLSPEC_HIDDEN;
extern ULONG_PTR args_alignment DECLSPEC_HIDDEN;
@ -170,6 +173,15 @@ static inline OBJECT_ATTRIBUTES *objattr_32to64( struct object_attr64 *out, cons
return &out->attr;
}
static inline OBJECT_ATTRIBUTES *objattr_32to64_redirect( struct object_attr64 *out,
const OBJECT_ATTRIBUTES32 *in )
{
OBJECT_ATTRIBUTES *attr = objattr_32to64( out, in );
if (attr) get_file_redirect( attr );
return attr;
}
static inline void put_handle( ULONG *handle32, HANDLE handle )
{
*handle32 = HandleToULong( handle );