private void OpenSqlFileStream
(
string path,
byte[] transactionContext,
System.IO.FileAccess access,
System.IO.FileOptions options,
Int64 allocationSize
)
{
//-----------------------------------------------------------------
// precondition validation
// these should be checked by any caller of this method
// ensure we have validated and normalized the path before
Debug.Assert(path != null);
Debug.Assert(transactionContext != null);
if (access != FileAccess.Read && access != FileAccess.Write && access != FileAccess.ReadWrite)
{
throw ADP.ArgumentOutOfRange("access");
}
// FileOptions is a set of flags, so AND the given value against the set of values we do not support
if ((options & ~(FileOptions.WriteThrough | FileOptions.Asynchronous | FileOptions.RandomAccess | FileOptions.SequentialScan)) != 0)
{
throw ADP.ArgumentOutOfRange("options");
}
//-----------------------------------------------------------------
// normalize the provided path
// * compress path to remove any occurences of '.' or '..'
// * trim whitespace from the beginning and end of the path
// * ensure that the path starts with '\\'
// * ensure that the path does not start with '\\.\'
// * ensure that the path is not longer than Int16.MaxValue
path = GetFullPathInternal(path);
// ensure the running code has permission to read/write the file
DemandAccessPermission(path, access);
FileFullEaInformation eaBuffer = null;
SecurityQualityOfService qos = null;
UnicodeString objectName = null;
Microsoft.Win32.SafeHandles.SafeFileHandle hFile = null;
int nDesiredAccess = UnsafeNativeMethods.FILE_READ_ATTRIBUTES | UnsafeNativeMethods.SYNCHRONIZE;
UInt32 dwCreateOptions = 0;
UInt32 dwCreateDisposition = 0;
System.IO.FileShare shareAccess = System.IO.FileShare.None;
switch (access)
{
case System.IO.FileAccess.Read:
nDesiredAccess |= UnsafeNativeMethods.FILE_READ_DATA;
shareAccess = System.IO.FileShare.Delete | System.IO.FileShare.ReadWrite;
dwCreateDisposition = (uint)UnsafeNativeMethods.CreationDisposition.FILE_OPEN;
break;
case System.IO.FileAccess.Write:
nDesiredAccess |= UnsafeNativeMethods.FILE_WRITE_DATA;
shareAccess = System.IO.FileShare.Delete | System.IO.FileShare.Read;
dwCreateDisposition = (uint)UnsafeNativeMethods.CreationDisposition.FILE_OVERWRITE;
break;
case System.IO.FileAccess.ReadWrite:
default:
// we validate the value of 'access' parameter in the beginning of this method
Debug.Assert(access == System.IO.FileAccess.ReadWrite);
nDesiredAccess |= UnsafeNativeMethods.FILE_READ_DATA | UnsafeNativeMethods.FILE_WRITE_DATA;
shareAccess = System.IO.FileShare.Delete | System.IO.FileShare.Read;
dwCreateDisposition = (uint)UnsafeNativeMethods.CreationDisposition.FILE_OVERWRITE;
break;
}
if ((options & System.IO.FileOptions.WriteThrough) != 0)
{
dwCreateOptions |= (uint)UnsafeNativeMethods.CreateOption.FILE_WRITE_THROUGH;
}
if ((options & System.IO.FileOptions.Asynchronous) == 0)
{
dwCreateOptions |= (uint)UnsafeNativeMethods.CreateOption.FILE_SYNCHRONOUS_IO_NONALERT;
}
if ((options & System.IO.FileOptions.SequentialScan) != 0)
{
dwCreateOptions |= (uint)UnsafeNativeMethods.CreateOption.FILE_SEQUENTIAL_ONLY;
}
if ((options & System.IO.FileOptions.RandomAccess) != 0)
{
dwCreateOptions |= (uint)UnsafeNativeMethods.CreateOption.FILE_RANDOM_ACCESS;
}
try
{
eaBuffer = new FileFullEaInformation(transactionContext);
qos = new SecurityQualityOfService(UnsafeNativeMethods.SecurityImpersonationLevel.SecurityAnonymous,
false, false);
// NOTE: the Name property is intended to reveal the publicly available moniker for the
// FILESTREAM attributed column data. We will not surface the internal processing that
// takes place to create the mappedPath.
string mappedPath = InitializeNtPath(path);
objectName = new UnicodeString(mappedPath);
UnsafeNativeMethods.OBJECT_ATTRIBUTES oa;
oa.length = Marshal.SizeOf(typeof(UnsafeNativeMethods.OBJECT_ATTRIBUTES));
oa.rootDirectory = IntPtr.Zero;
oa.attributes = (int)UnsafeNativeMethods.Attributes.CaseInsensitive;
oa.securityDescriptor = IntPtr.Zero;
oa.securityQualityOfService = qos;
oa.objectName = objectName;
UnsafeNativeMethods.IO_STATUS_BLOCK ioStatusBlock;
uint oldMode;
uint retval = 0;
UnsafeNativeMethods.SetErrorModeWrapper(UnsafeNativeMethods.SEM_FAILCRITICALERRORS, out oldMode);
try
{
Bid.Trace("<sc.SqlFileStream.OpenSqlFileStream|ADV> %d#, desiredAccess=0x%08x, allocationSize=%I64d, fileAttributes=0x%08x, shareAccess=0x%08x, dwCreateDisposition=0x%08x, createOptions=0x%08x\n",
ObjectID, (int)nDesiredAccess, allocationSize, 0, (int)shareAccess, dwCreateDisposition, dwCreateOptions);
retval = UnsafeNativeMethods.NtCreateFile(out hFile, nDesiredAccess,
ref oa, out ioStatusBlock, ref allocationSize,
0, shareAccess, dwCreateDisposition, dwCreateOptions,
eaBuffer, (uint)eaBuffer.Length);
}
finally
{
UnsafeNativeMethods.SetErrorModeWrapper(oldMode, out oldMode);
}
switch (retval)
{
case 0:
break;
case UnsafeNativeMethods.STATUS_SHARING_VIOLATION:
throw ADP.InvalidOperation(Res.GetString(Res.SqlFileStream_FileAlreadyInTransaction));
case UnsafeNativeMethods.STATUS_INVALID_PARAMETER:
throw ADP.Argument(Res.GetString(Res.SqlFileStream_InvalidParameter));
case UnsafeNativeMethods.STATUS_OBJECT_NAME_NOT_FOUND:
{
System.IO.DirectoryNotFoundException e = new System.IO.DirectoryNotFoundException();
ADP.TraceExceptionAsReturnValue(e);
throw e;
}
default:
{
uint error = UnsafeNativeMethods.RtlNtStatusToDosError(retval);
if (error == UnsafeNativeMethods.ERROR_MR_MID_NOT_FOUND)
{
// status code could not be mapped to a Win32 error code
error = retval;
}
System.ComponentModel.Win32Exception e = new System.ComponentModel.Win32Exception(unchecked ((int)error));
ADP.TraceExceptionAsReturnValue(e);
throw e;
}
}
if (hFile.IsInvalid)
{
System.ComponentModel.Win32Exception e = new System.ComponentModel.Win32Exception(UnsafeNativeMethods.ERROR_INVALID_HANDLE);
ADP.TraceExceptionAsReturnValue(e);
throw e;
}
UnsafeNativeMethods.FileType fileType = UnsafeNativeMethods.GetFileType(hFile);
if (fileType != UnsafeNativeMethods.FileType.Disk)
{
hFile.Dispose();
throw ADP.Argument(Res.GetString(Res.SqlFileStream_PathNotValidDiskResource));
}
// if the user is opening the SQL FileStream in read/write mode, we assume that they want to scan
// through current data and then append new data to the end, so we need to tell SQL Server to preserve
// the existing file contents.
if (access == System.IO.FileAccess.ReadWrite)
{
uint ioControlCode = UnsafeNativeMethods.CTL_CODE(UnsafeNativeMethods.FILE_DEVICE_FILE_SYSTEM,
IoControlCodeFunctionCode, (byte)UnsafeNativeMethods.Method.METHOD_BUFFERED,
(byte)UnsafeNativeMethods.Access.FILE_ANY_ACCESS);
uint cbBytesReturned = 0;
if (!UnsafeNativeMethods.DeviceIoControl(hFile, ioControlCode, IntPtr.Zero, 0, IntPtr.Zero, 0, out cbBytesReturned, IntPtr.Zero))
{
System.ComponentModel.Win32Exception e = new System.ComponentModel.Win32Exception(Marshal.GetLastWin32Error());
ADP.TraceExceptionAsReturnValue(e);
throw e;
}
}
// now that we've successfully opened a handle on the path and verified that it is a file,
// use the SafeFileHandle to initialize our internal System.IO.FileStream instance
// NOTE: need to assert UnmanagedCode permissions for this constructor. This is relatively benign
// in that we've done much the same validation as in the FileStream(string path, ...) ctor case
// most notably, validating that the handle type corresponds to an on-disk file.
bool bRevertAssert = false;
try
{
SecurityPermission sp = new SecurityPermission(SecurityPermissionFlag.UnmanagedCode);
sp.Assert();
bRevertAssert = true;
System.Diagnostics.Debug.Assert(m_fs == null);
m_fs = new System.IO.FileStream(hFile, access, DefaultBufferSize, ((options & System.IO.FileOptions.Asynchronous) != 0));
}
finally
{
if (bRevertAssert)
{
SecurityPermission.RevertAssert();
}
}
}
catch
{
if (hFile != null && !hFile.IsInvalid)
{
hFile.Dispose();
}
throw;
}
finally
{
if (eaBuffer != null)
{
eaBuffer.Dispose();
eaBuffer = null;
}
if (qos != null)
{
qos.Dispose();
qos = null;
}
if (objectName != null)
{
objectName.Dispose();
objectName = null;
}
}
}
private void OpenSqlFileStream
(
string path,
byte[] transactionContext,
System.IO.FileAccess access,
System.IO.FileOptions options,
Int64 allocationSize
)
{
//-----------------------------------------------------------------
// precondition validation
// these should be checked by any caller of this method
// ensure we have validated and normalized the path before
Debug.Assert ( path != null );
Debug.Assert (transactionContext != null);
if (access != FileAccess.Read && access != FileAccess.Write && access != FileAccess.ReadWrite)
throw ADP.ArgumentOutOfRange ("access");
// FileOptions is a set of flags, so AND the given value against the set of values we do not support
if ( ( options & ~( FileOptions.WriteThrough | FileOptions.Asynchronous | FileOptions.RandomAccess | FileOptions.SequentialScan ) ) != 0 )
throw ADP.ArgumentOutOfRange ( "options" );
//-----------------------------------------------------------------
// normalize the provided path
// * compress path to remove any occurences of '.' or '..'
// * trim whitespace from the beginning and end of the path
// * ensure that the path starts with '\\'
// * ensure that the path does not start with '\\.\'
// * ensure that the path is not longer than Int16.MaxValue
path = GetFullPathInternal ( path );
// ensure the running code has permission to read/write the file
DemandAccessPermission(path, access);
FileFullEaInformation eaBuffer = null;
SecurityQualityOfService qos = null;
UnicodeString objectName = null;
Microsoft.Win32.SafeHandles.SafeFileHandle hFile = null;
int nDesiredAccess = UnsafeNativeMethods.FILE_READ_ATTRIBUTES | UnsafeNativeMethods.SYNCHRONIZE;
UInt32 dwCreateOptions = 0;
UInt32 dwCreateDisposition = 0;
System.IO.FileShare shareAccess = System.IO.FileShare.None;
switch (access)
{
case System.IO.FileAccess.Read:
nDesiredAccess |= UnsafeNativeMethods.FILE_READ_DATA;
shareAccess = System.IO.FileShare.Delete | System.IO.FileShare.ReadWrite;
dwCreateDisposition = (uint) UnsafeNativeMethods.CreationDisposition.FILE_OPEN;
break;
case System.IO.FileAccess.Write:
nDesiredAccess |= UnsafeNativeMethods.FILE_WRITE_DATA;
shareAccess = System.IO.FileShare.Delete | System.IO.FileShare.Read;
dwCreateDisposition = (uint) UnsafeNativeMethods.CreationDisposition.FILE_OVERWRITE;
break;
case System.IO.FileAccess.ReadWrite:
default:
// we validate the value of 'access' parameter in the beginning of this method
Debug.Assert(access == System.IO.FileAccess.ReadWrite);
nDesiredAccess |= UnsafeNativeMethods.FILE_READ_DATA | UnsafeNativeMethods.FILE_WRITE_DATA;
shareAccess = System.IO.FileShare.Delete | System.IO.FileShare.Read;
dwCreateDisposition = (uint) UnsafeNativeMethods.CreationDisposition.FILE_OVERWRITE;
break;
}
if ((options & System.IO.FileOptions.WriteThrough) != 0)
{
dwCreateOptions |= (uint) UnsafeNativeMethods.CreateOption.FILE_WRITE_THROUGH;
}
if ((options & System.IO.FileOptions.Asynchronous) == 0)
{
dwCreateOptions |= (uint) UnsafeNativeMethods.CreateOption.FILE_SYNCHRONOUS_IO_NONALERT;
}
if ((options & System.IO.FileOptions.SequentialScan) != 0)
{
dwCreateOptions |= (uint) UnsafeNativeMethods.CreateOption.FILE_SEQUENTIAL_ONLY;
}
if ( (options & System.IO.FileOptions.RandomAccess) != 0)
{
dwCreateOptions |= (uint) UnsafeNativeMethods.CreateOption.FILE_RANDOM_ACCESS;
}
try
{
eaBuffer = new FileFullEaInformation(transactionContext);
qos = new SecurityQualityOfService(UnsafeNativeMethods.SecurityImpersonationLevel.SecurityAnonymous,
false, false);
// NOTE: the Name property is intended to reveal the publicly available moniker for the
// FILESTREAM attributed column data. We will not surface the internal processing that
// takes place to create the mappedPath.
string mappedPath = InitializeNtPath(path);
objectName = new UnicodeString(mappedPath);
UnsafeNativeMethods.OBJECT_ATTRIBUTES oa;
oa.length = Marshal.SizeOf(typeof(UnsafeNativeMethods.OBJECT_ATTRIBUTES));
oa.rootDirectory = IntPtr.Zero;
oa.attributes = (int)UnsafeNativeMethods.Attributes.CaseInsensitive;
oa.securityDescriptor = IntPtr.Zero;
oa.securityQualityOfService = qos;
oa.objectName = objectName;
UnsafeNativeMethods.IO_STATUS_BLOCK ioStatusBlock;
uint oldMode;
uint retval = 0;
UnsafeNativeMethods.SetErrorModeWrapper ( UnsafeNativeMethods.SEM_FAILCRITICALERRORS, out oldMode );
try
{
Bid.Trace("<sc.SqlFileStream.OpenSqlFileStream|ADV> %d#, desiredAccess=0x%08x, allocationSize=%I64d, fileAttributes=0x%08x, shareAccess=0x%08x, dwCreateDisposition=0x%08x, createOptions=0x%08x\n",
ObjectID, (int) nDesiredAccess, allocationSize, 0, (int) shareAccess, dwCreateDisposition, dwCreateOptions );
retval = UnsafeNativeMethods.NtCreateFile(out hFile, nDesiredAccess,
ref oa, out ioStatusBlock, ref allocationSize,
0, shareAccess, dwCreateDisposition, dwCreateOptions,
eaBuffer, (uint) eaBuffer.Length);
}
finally
{
UnsafeNativeMethods.SetErrorModeWrapper( oldMode, out oldMode );
}
switch ( retval )
{
case 0:
break;
case UnsafeNativeMethods.STATUS_SHARING_VIOLATION:
throw ADP.InvalidOperation ( Res.GetString ( Res.SqlFileStream_FileAlreadyInTransaction ) );
case UnsafeNativeMethods.STATUS_INVALID_PARAMETER:
throw ADP.Argument ( Res.GetString ( Res.SqlFileStream_InvalidParameter ) );
case UnsafeNativeMethods.STATUS_OBJECT_NAME_NOT_FOUND:
{
System.IO.DirectoryNotFoundException e = new System.IO.DirectoryNotFoundException();
ADP.TraceExceptionAsReturnValue ( e );
throw e;
}
default:
{
uint error = UnsafeNativeMethods.RtlNtStatusToDosError ( retval );
if ( error == UnsafeNativeMethods.ERROR_MR_MID_NOT_FOUND )
{
// status code could not be mapped to a Win32 error code
error = retval;
}
System.ComponentModel.Win32Exception e = new System.ComponentModel.Win32Exception ( unchecked ( (int) error ) );
ADP.TraceExceptionAsReturnValue ( e );
throw e;
}
}
if ( hFile.IsInvalid )
{
System.ComponentModel.Win32Exception e = new System.ComponentModel.Win32Exception ( UnsafeNativeMethods.ERROR_INVALID_HANDLE );
ADP.TraceExceptionAsReturnValue ( e );
throw e;
}
UnsafeNativeMethods.FileType fileType = UnsafeNativeMethods.GetFileType(hFile);
if (fileType != UnsafeNativeMethods.FileType.Disk)
{
hFile.Dispose();
throw ADP.Argument ( Res.GetString ( Res.SqlFileStream_PathNotValidDiskResource ) );
}
// if the user is opening the SQL FileStream in read/write mode, we assume that they want to scan
// through current data and then append new data to the end, so we need to tell SQL Server to preserve
// the existing file contents.
if ( access == System.IO.FileAccess.ReadWrite )
{
uint ioControlCode = UnsafeNativeMethods.CTL_CODE ( UnsafeNativeMethods.FILE_DEVICE_FILE_SYSTEM,
IoControlCodeFunctionCode, (byte) UnsafeNativeMethods.Method.METHOD_BUFFERED,
(byte) UnsafeNativeMethods.Access.FILE_ANY_ACCESS);
uint cbBytesReturned = 0;
if ( !UnsafeNativeMethods.DeviceIoControl ( hFile, ioControlCode, IntPtr.Zero, 0, IntPtr.Zero, 0, out cbBytesReturned, IntPtr.Zero ) )
{
System.ComponentModel.Win32Exception e = new System.ComponentModel.Win32Exception ( Marshal.GetLastWin32Error() );
ADP.TraceExceptionAsReturnValue ( e );
throw e;
}
}
// now that we've successfully opened a handle on the path and verified that it is a file,
// use the SafeFileHandle to initialize our internal System.IO.FileStream instance
// NOTE: need to assert UnmanagedCode permissions for this constructor. This is relatively benign
// in that we've done much the same validation as in the FileStream(string path, ...) ctor case
// most notably, validating that the handle type corresponds to an on-disk file.
bool bRevertAssert = false;
try
{
SecurityPermission sp = new SecurityPermission ( SecurityPermissionFlag.UnmanagedCode );
sp.Assert();
bRevertAssert = true;
System.Diagnostics.Debug.Assert ( m_fs == null );
#if MOBILE
m_fs = new System.IO.FileStream ( hFile.DangerousGetHandle (), access, ( ( options & System.IO.FileOptions.Asynchronous ) != 0 ), DefaultBufferSize );
#else
m_fs = new System.IO.FileStream ( hFile, access, DefaultBufferSize, ( ( options & System.IO.FileOptions.Asynchronous ) != 0 ) );
#endif
}
finally
{
if ( bRevertAssert )
SecurityPermission.RevertAssert();
}
}
catch
{
if ( hFile != null && !hFile.IsInvalid )
hFile.Dispose();
throw;
}
finally
{
if (eaBuffer != null)
{
eaBuffer.Dispose();
eaBuffer = null;
}
if (qos != null)
{
qos.Dispose();
qos = null;
}
if (objectName != null)
{
objectName.Dispose();
objectName = null;
}
}
}
private void OpenSqlFileStream(string path, byte[] transactionContext, FileAccess access, FileOptions options, long allocationSize)
{
if (((access != FileAccess.Read) && (access != FileAccess.Write)) && (access != FileAccess.ReadWrite))
{
throw ADP.ArgumentOutOfRange("access");
}
if ((options & ~(FileOptions.Asynchronous | FileOptions.RandomAccess | FileOptions.SequentialScan | FileOptions.WriteThrough)) != FileOptions.None)
{
throw ADP.ArgumentOutOfRange("options");
}
path = GetFullPathInternal(path);
DemandAccessPermission(path, access);
FileFullEaInformation eaBuffer = null;
SecurityQualityOfService service = null;
UnicodeString str = null;
SafeFileHandle fileHandle = null;
int num2 = 0x100080;
uint num = 0;
uint num4 = 0;
FileShare none = FileShare.None;
switch (access)
{
case FileAccess.Read:
num2 |= 1;
none = FileShare.Delete | FileShare.ReadWrite;
num4 = 1;
break;
case FileAccess.Write:
num2 |= 2;
none = FileShare.Delete | FileShare.Read;
num4 = 4;
break;
default:
num2 |= 3;
none = FileShare.Delete | FileShare.Read;
num4 = 4;
break;
}
if ((options & (FileOptions.None | FileOptions.WriteThrough)) != FileOptions.None)
{
num |= 2;
}
if ((options & FileOptions.Asynchronous) == FileOptions.None)
{
num |= 0x20;
}
if ((options & FileOptions.SequentialScan) != FileOptions.None)
{
num |= 4;
}
if ((options & FileOptions.RandomAccess) != FileOptions.None)
{
num |= 0x800;
}
try
{
System.Data.SqlTypes.UnsafeNativeMethods.OBJECT_ATTRIBUTES object_attributes;
eaBuffer = new FileFullEaInformation(transactionContext);
service = new SecurityQualityOfService(System.Data.SqlTypes.UnsafeNativeMethods.SecurityImpersonationLevel.SecurityAnonymous, false, false);
str = new UnicodeString(InitializeNtPath(path));
object_attributes.length = Marshal.SizeOf(typeof(System.Data.SqlTypes.UnsafeNativeMethods.OBJECT_ATTRIBUTES));
object_attributes.rootDirectory = IntPtr.Zero;
object_attributes.attributes = 0x40;
object_attributes.securityDescriptor = IntPtr.Zero;
object_attributes.securityQualityOfService = service;
object_attributes.objectName = str;
uint mode = System.Data.SqlTypes.UnsafeNativeMethods.SetErrorMode(1);
uint status = 0;
try
{
System.Data.SqlTypes.UnsafeNativeMethods.IO_STATUS_BLOCK io_status_block;
Bid.Trace("<sc.SqlFileStream.OpenSqlFileStream|ADV> %d#, desiredAccess=0x%08x, allocationSize=%I64d, fileAttributes=0x%08x, shareAccess=0x%08x, dwCreateDisposition=0x%08x, createOptions=0x%08x\n", this.ObjectID, num2, allocationSize, 0, (int) none, num4, num);
status = System.Data.SqlTypes.UnsafeNativeMethods.NtCreateFile(out fileHandle, num2, ref object_attributes, out io_status_block, ref allocationSize, 0, none, num4, num, eaBuffer, (uint) eaBuffer.Length);
}
finally
{
System.Data.SqlTypes.UnsafeNativeMethods.SetErrorMode(mode);
}
switch (status)
{
case 0:
break;
case 0xc000000d:
throw ADP.Argument(Res.GetString("SqlFileStream_InvalidParameter"));
case 0xc0000034:
{
DirectoryNotFoundException e = new DirectoryNotFoundException();
ADP.TraceExceptionAsReturnValue(e);
throw e;
}
case 0xc0000043:
throw ADP.InvalidOperation(Res.GetString("SqlFileStream_FileAlreadyInTransaction"));
default:
{
uint num6 = System.Data.SqlTypes.UnsafeNativeMethods.RtlNtStatusToDosError(status);
if (num6 == 0x13d)
{
num6 = status;
}
Win32Exception exception3 = new Win32Exception((int) num6);
ADP.TraceExceptionAsReturnValue(exception3);
throw exception3;
}
}
if (fileHandle.IsInvalid)
{
Win32Exception exception2 = new Win32Exception(6);
ADP.TraceExceptionAsReturnValue(exception2);
throw exception2;
}
if (System.Data.SqlTypes.UnsafeNativeMethods.GetFileType(fileHandle) != System.Data.SqlTypes.UnsafeNativeMethods.FileType.Disk)
{
fileHandle.Dispose();
throw ADP.Argument(Res.GetString("SqlFileStream_PathNotValidDiskResource"));
}
if (access == FileAccess.ReadWrite)
{
uint ioControlCode = System.Data.SqlTypes.UnsafeNativeMethods.CTL_CODE(9, 0x958, 0, 0);
uint cbBytesReturned = 0;
if (!System.Data.SqlTypes.UnsafeNativeMethods.DeviceIoControl(fileHandle, ioControlCode, IntPtr.Zero, 0, IntPtr.Zero, 0, out cbBytesReturned, IntPtr.Zero))
{
Win32Exception exception = new Win32Exception(Marshal.GetLastWin32Error());
ADP.TraceExceptionAsReturnValue(exception);
throw exception;
}
}
bool flag = false;
try
{
new SecurityPermission(SecurityPermissionFlag.UnmanagedCode).Assert();
flag = true;
this.m_fs = new FileStream(fileHandle, access, 1, (options & FileOptions.Asynchronous) != FileOptions.None);
}
finally
{
if (flag)
{
CodeAccessPermission.RevertAssert();
}
}
}
catch
{
if ((fileHandle != null) && !fileHandle.IsInvalid)
{
fileHandle.Dispose();
}
throw;
}
finally
{
if (eaBuffer != null)
{
eaBuffer.Dispose();
eaBuffer = null;
}
if (service != null)
{
service.Dispose();
service = null;
}
if (str != null)
{
str.Dispose();
str = null;
}
}
}
private void OpenSqlFileStream(string path, byte[] transactionContext, FileAccess access, FileOptions options, long allocationSize)
{
if (((access != FileAccess.Read) && (access != FileAccess.Write)) && (access != FileAccess.ReadWrite))
{
throw ADP.ArgumentOutOfRange("access");
}
if ((options & ~(FileOptions.Asynchronous | FileOptions.RandomAccess | FileOptions.SequentialScan | FileOptions.WriteThrough)) != FileOptions.None)
{
throw ADP.ArgumentOutOfRange("options");
}
path = GetFullPathInternal(path);
DemandAccessPermission(path, access);
FileFullEaInformation eaBuffer = null;
SecurityQualityOfService service = null;
UnicodeString str = null;
SafeFileHandle fileHandle = null;
int num2 = 0x100080;
uint num = 0;
uint num4 = 0;
FileShare none = FileShare.None;
switch (access)
{
case FileAccess.Read:
num2 |= 1;
none = FileShare.Delete | FileShare.ReadWrite;
num4 = 1;
break;
case FileAccess.Write:
num2 |= 2;
none = FileShare.Delete | FileShare.Read;
num4 = 4;
break;
default:
num2 |= 3;
none = FileShare.Delete | FileShare.Read;
num4 = 4;
break;
}
if ((options & (FileOptions.None | FileOptions.WriteThrough)) != FileOptions.None)
{
num |= 2;
}
if ((options & FileOptions.Asynchronous) == FileOptions.None)
{
num |= 0x20;
}
if ((options & FileOptions.SequentialScan) != FileOptions.None)
{
num |= 4;
}
if ((options & FileOptions.RandomAccess) != FileOptions.None)
{
num |= 0x800;
}
try
{
System.Data.SqlTypes.UnsafeNativeMethods.OBJECT_ATTRIBUTES object_attributes;
eaBuffer = new FileFullEaInformation(transactionContext);
service = new SecurityQualityOfService(System.Data.SqlTypes.UnsafeNativeMethods.SecurityImpersonationLevel.SecurityAnonymous, false, false);
str = new UnicodeString(InitializeNtPath(path));
object_attributes.length = Marshal.SizeOf(typeof(System.Data.SqlTypes.UnsafeNativeMethods.OBJECT_ATTRIBUTES));
object_attributes.rootDirectory = IntPtr.Zero;
object_attributes.attributes = 0x40;
object_attributes.securityDescriptor = IntPtr.Zero;
object_attributes.securityQualityOfService = service;
object_attributes.objectName = str;
uint mode = System.Data.SqlTypes.UnsafeNativeMethods.SetErrorMode(1);
uint status = 0;
try
{
System.Data.SqlTypes.UnsafeNativeMethods.IO_STATUS_BLOCK io_status_block;
Bid.Trace("<sc.SqlFileStream.OpenSqlFileStream|ADV> %d#, desiredAccess=0x%08x, allocationSize=%I64d, fileAttributes=0x%08x, shareAccess=0x%08x, dwCreateDisposition=0x%08x, createOptions=0x%08x\n", this.ObjectID, num2, allocationSize, 0, (int)none, num4, num);
status = System.Data.SqlTypes.UnsafeNativeMethods.NtCreateFile(out fileHandle, num2, ref object_attributes, out io_status_block, ref allocationSize, 0, none, num4, num, eaBuffer, (uint)eaBuffer.Length);
}
finally
{
System.Data.SqlTypes.UnsafeNativeMethods.SetErrorMode(mode);
}
switch (status)
{
case 0:
break;
case 0xc000000d:
throw ADP.Argument(Res.GetString("SqlFileStream_InvalidParameter"));
case 0xc0000034:
{
DirectoryNotFoundException e = new DirectoryNotFoundException();
ADP.TraceExceptionAsReturnValue(e);
throw e;
}
case 0xc0000043:
throw ADP.InvalidOperation(Res.GetString("SqlFileStream_FileAlreadyInTransaction"));
default:
{
uint num6 = System.Data.SqlTypes.UnsafeNativeMethods.RtlNtStatusToDosError(status);
if (num6 == 0x13d)
{
num6 = status;
}
Win32Exception exception3 = new Win32Exception((int)num6);
ADP.TraceExceptionAsReturnValue(exception3);
throw exception3;
}
}
if (fileHandle.IsInvalid)
{
Win32Exception exception2 = new Win32Exception(6);
ADP.TraceExceptionAsReturnValue(exception2);
throw exception2;
}
if (System.Data.SqlTypes.UnsafeNativeMethods.GetFileType(fileHandle) != System.Data.SqlTypes.UnsafeNativeMethods.FileType.Disk)
{
fileHandle.Dispose();
throw ADP.Argument(Res.GetString("SqlFileStream_PathNotValidDiskResource"));
}
if (access == FileAccess.ReadWrite)
{
uint ioControlCode = System.Data.SqlTypes.UnsafeNativeMethods.CTL_CODE(9, 0x958, 0, 0);
uint cbBytesReturned = 0;
if (!System.Data.SqlTypes.UnsafeNativeMethods.DeviceIoControl(fileHandle, ioControlCode, IntPtr.Zero, 0, IntPtr.Zero, 0, out cbBytesReturned, IntPtr.Zero))
{
Win32Exception exception = new Win32Exception(Marshal.GetLastWin32Error());
ADP.TraceExceptionAsReturnValue(exception);
throw exception;
}
}
bool flag = false;
try
{
new SecurityPermission(SecurityPermissionFlag.UnmanagedCode).Assert();
flag = true;
this.m_fs = new FileStream(fileHandle, access, 1, (options & FileOptions.Asynchronous) != FileOptions.None);
}
finally
{
if (flag)
{
CodeAccessPermission.RevertAssert();
}
}
}
catch
{
if ((fileHandle != null) && !fileHandle.IsInvalid)
{
fileHandle.Dispose();
}
throw;
}
finally
{
if (eaBuffer != null)
{
eaBuffer.Dispose();
eaBuffer = null;
}
if (service != null)
{
service.Dispose();
service = null;
}
if (str != null)
{
str.Dispose();
str = null;
}
}
}
