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[FORMATTING] - STDCALL->NTAPI changes, tab->Spaces, name decoration, etc.

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- Add Eric's name since when I copied security.c into file.c, I forgot to add his name as well for that code.

svn path=/trunk/; revision=22936
This commit is contained in:
Alex Ionescu
2006-07-08 18:57:51 +00:00
parent 909fdbdc9c
commit b256a775b7
1 changed files with 320 additions and 360 deletions
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reactos/ntoskrnl/io/iomgr/file.c
+320 -360
View File
@@ -5,6 +5,7 @@
* PURPOSE: Functions that deal with managing the FILE_OBJECT itself.
* PROGRAMMERS: Alex Ionescu ([email protected])
* Gunnar Dalsnes
* Eric Kohl
* Filip Navara ([email protected])
*/
@@ -1197,7 +1198,7 @@ IoCheckQuerySetFileInformation(IN FILE_INFORMATION_CLASS FileInformationClass,
* @unimplemented
*/
NTSTATUS
STDCALL
NTAPI
IoCheckQuotaBufferValidity(IN PFILE_QUOTA_INFORMATION QuotaBuffer,
IN ULONG QuotaLength,
OUT PULONG ErrorOffset)
@@ -1457,7 +1458,7 @@ IoCreateFile(OUT PHANDLE FileHandle,
* @unimplemented
*/
NTSTATUS
STDCALL
NTAPI
IoCreateFileSpecifyDeviceObjectHint(OUT PHANDLE FileHandle,
IN ACCESS_MASK DesiredAccess,
IN POBJECT_ATTRIBUTES ObjectAttributes,
@@ -1534,7 +1535,7 @@ IoCreateStreamFileObject(IN PFILE_OBJECT FileObject,
* @unimplemented
*/
PFILE_OBJECT
STDCALL
NTAPI
IoCreateStreamFileObjectEx(IN PFILE_OBJECT FileObject OPTIONAL,
IN PDEVICE_OBJECT DeviceObject OPTIONAL,
OUT PHANDLE FileObjectHandle OPTIONAL)
@@ -1547,7 +1548,7 @@ IoCreateStreamFileObjectEx(IN PFILE_OBJECT FileObject OPTIONAL,
* @unimplemented
*/
PFILE_OBJECT
STDCALL
NTAPI
IoCreateStreamFileObjectLite(IN PFILE_OBJECT FileObject OPTIONAL,
IN PDEVICE_OBJECT DeviceObject OPTIONAL)
{
@@ -1559,9 +1560,10 @@ IoCreateStreamFileObjectLite(IN PFILE_OBJECT FileObject OPTIONAL,
* @implemented
*/
PGENERIC_MAPPING
STDCALL
NTAPI
IoGetFileObjectGenericMapping(VOID)
{
/* Return the mapping */
return &IopFileMapping;
}
@@ -1576,6 +1578,264 @@ IoIsFileOriginRemote(IN PFILE_OBJECT FileObject)
return (FileObject->Flags & FO_REMOTE_ORIGIN);
}
/*
* @implemented
*/
BOOLEAN
NTAPI
IoFastQueryNetworkAttributes(IN POBJECT_ATTRIBUTES ObjectAttributes,
IN ACCESS_MASK DesiredAccess,
IN ULONG OpenOptions,
OUT PIO_STATUS_BLOCK IoStatus,
OUT PFILE_NETWORK_OPEN_INFORMATION Buffer)
{
NTSTATUS Status;
DUMMY_FILE_OBJECT DummyFileObject;
HANDLE Handle;
OPEN_PACKET OpenPacket;
PAGED_CODE();
/* Setup the Open Packet */
OpenPacket.Type = IO_TYPE_OPEN_PACKET;
OpenPacket.Size = sizeof(OPEN_PACKET);
OpenPacket.FileObject = NULL;
OpenPacket.FinalStatus = STATUS_SUCCESS;
OpenPacket.Information = 0;
OpenPacket.ParseCheck = 0;
OpenPacket.RelatedFileObject = NULL;
OpenPacket.AllocationSize.QuadPart = 0;
OpenPacket.CreateOptions = OpenOptions | FILE_OPEN_REPARSE_POINT;
OpenPacket.FileAttributes = 0;
OpenPacket.ShareAccess = FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE;
OpenPacket.EaBuffer = NULL;
OpenPacket.EaLength = 0;
OpenPacket.Options = IO_FORCE_ACCESS_CHECK;
OpenPacket.Disposition = FILE_OPEN;
OpenPacket.BasicInformation = NULL;
OpenPacket.NetworkInformation = Buffer;
OpenPacket.CreateFileType = 0;
OpenPacket.MailslotOrPipeParameters = NULL;
OpenPacket.Override = FALSE;
OpenPacket.QueryOnly = TRUE;
OpenPacket.DeleteOnly = FALSE;
OpenPacket.FullAttributes = TRUE;
OpenPacket.DummyFileObject = &DummyFileObject;
OpenPacket.InternalFlags = 0;
/*
* Attempt opening the file. This will call the I/O Parse Routine for
* the File Object (IopParseDevice) which will use the dummy file obejct
* send the IRP to its device object. Note that we have two statuses
* to worry about: the Object Manager's status (in Status) and the I/O
* status, which is in the Open Packet's Final Status, and determined
* by the Parse Check member.
*/
Status = ObOpenObjectByName(ObjectAttributes,
NULL,
KernelMode,
NULL,
DesiredAccess,
&OpenPacket,
&Handle);
if (OpenPacket.ParseCheck != TRUE)
{
/* Parse failed */
IoStatus->Status = Status;
}
else
{
/* Use the Io status */
IoStatus->Status = OpenPacket.FinalStatus;
IoStatus->Information = OpenPacket.Information;
}
/* Return success */
return TRUE;
}
/*
* @implemented
*/
VOID
NTAPI
IoUpdateShareAccess(IN PFILE_OBJECT FileObject,
OUT PSHARE_ACCESS ShareAccess)
{
PAGED_CODE();
if (FileObject->ReadAccess ||
FileObject->WriteAccess ||
FileObject->DeleteAccess)
{
ShareAccess->OpenCount++;
ShareAccess->Readers += FileObject->ReadAccess;
ShareAccess->Writers += FileObject->WriteAccess;
ShareAccess->Deleters += FileObject->DeleteAccess;
ShareAccess->SharedRead += FileObject->SharedRead;
ShareAccess->SharedWrite += FileObject->SharedWrite;
ShareAccess->SharedDelete += FileObject->SharedDelete;
}
}
/*
* @implemented
*/
NTSTATUS
NTAPI
IoCheckShareAccess(IN ACCESS_MASK DesiredAccess,
IN ULONG DesiredShareAccess,
IN PFILE_OBJECT FileObject,
IN PSHARE_ACCESS ShareAccess,
IN BOOLEAN Update)
{
BOOLEAN ReadAccess;
BOOLEAN WriteAccess;
BOOLEAN DeleteAccess;
BOOLEAN SharedRead;
BOOLEAN SharedWrite;
BOOLEAN SharedDelete;
PAGED_CODE();
ReadAccess = (DesiredAccess & (FILE_READ_DATA | FILE_EXECUTE)) != 0;
WriteAccess = (DesiredAccess & (FILE_WRITE_DATA | FILE_APPEND_DATA)) != 0;
DeleteAccess = (DesiredAccess & DELETE) != 0;
FileObject->ReadAccess = ReadAccess;
FileObject->WriteAccess = WriteAccess;
FileObject->DeleteAccess = DeleteAccess;
if (ReadAccess || WriteAccess || DeleteAccess)
{
SharedRead = (DesiredShareAccess & FILE_SHARE_READ) != 0;
SharedWrite = (DesiredShareAccess & FILE_SHARE_WRITE) != 0;
SharedDelete = (DesiredShareAccess & FILE_SHARE_DELETE) != 0;
FileObject->SharedRead = SharedRead;
FileObject->SharedWrite = SharedWrite;
FileObject->SharedDelete = SharedDelete;
if ((ReadAccess && (ShareAccess->SharedRead < ShareAccess->OpenCount)) ||
(WriteAccess && (ShareAccess->SharedWrite < ShareAccess->OpenCount)) ||
(DeleteAccess && (ShareAccess->SharedDelete < ShareAccess->OpenCount)) ||
((ShareAccess->Readers != 0) && !SharedRead) ||
((ShareAccess->Writers != 0) && !SharedWrite) ||
((ShareAccess->Deleters != 0) && !SharedDelete))
{
return(STATUS_SHARING_VIOLATION);
}
if (Update)
{
ShareAccess->OpenCount++;
ShareAccess->Readers += ReadAccess;
ShareAccess->Writers += WriteAccess;
ShareAccess->Deleters += DeleteAccess;
ShareAccess->SharedRead += SharedRead;
ShareAccess->SharedWrite += SharedWrite;
ShareAccess->SharedDelete += SharedDelete;
}
}
return(STATUS_SUCCESS);
}
/*
* @implemented
*/
VOID
NTAPI
IoRemoveShareAccess(IN PFILE_OBJECT FileObject,
IN PSHARE_ACCESS ShareAccess)
{
PAGED_CODE();
if (FileObject->ReadAccess ||
FileObject->WriteAccess ||
FileObject->DeleteAccess)
{
ShareAccess->OpenCount--;
ShareAccess->Readers -= FileObject->ReadAccess;
ShareAccess->Writers -= FileObject->WriteAccess;
ShareAccess->Deleters -= FileObject->DeleteAccess;
ShareAccess->SharedRead -= FileObject->SharedRead;
ShareAccess->SharedWrite -= FileObject->SharedWrite;
ShareAccess->SharedDelete -= FileObject->SharedDelete;
}
}
/*
* @implemented
*/
VOID
NTAPI
IoSetShareAccess(IN ACCESS_MASK DesiredAccess,
IN ULONG DesiredShareAccess,
IN PFILE_OBJECT FileObject,
OUT PSHARE_ACCESS ShareAccess)
{
BOOLEAN ReadAccess;
BOOLEAN WriteAccess;
BOOLEAN DeleteAccess;
BOOLEAN SharedRead;
BOOLEAN SharedWrite;
BOOLEAN SharedDelete;
PAGED_CODE();
ReadAccess = (DesiredAccess & (FILE_READ_DATA | FILE_EXECUTE)) != 0;
WriteAccess = (DesiredAccess & (FILE_WRITE_DATA | FILE_APPEND_DATA)) != 0;
DeleteAccess = (DesiredAccess & DELETE) != 0;
FileObject->ReadAccess = ReadAccess;
FileObject->WriteAccess = WriteAccess;
FileObject->DeleteAccess = DeleteAccess;
if (!ReadAccess && !WriteAccess && !DeleteAccess)
{
ShareAccess->OpenCount = 0;
ShareAccess->Readers = 0;
ShareAccess->Writers = 0;
ShareAccess->Deleters = 0;
ShareAccess->SharedRead = 0;
ShareAccess->SharedWrite = 0;
ShareAccess->SharedDelete = 0;
}
else
{
SharedRead = (DesiredShareAccess & FILE_SHARE_READ) != 0;
SharedWrite = (DesiredShareAccess & FILE_SHARE_WRITE) != 0;
SharedDelete = (DesiredShareAccess & FILE_SHARE_DELETE) != 0;
FileObject->SharedRead = SharedRead;
FileObject->SharedWrite = SharedWrite;
FileObject->SharedDelete = SharedDelete;
ShareAccess->OpenCount = 1;
ShareAccess->Readers = ReadAccess;
ShareAccess->Writers = WriteAccess;
ShareAccess->Deleters = DeleteAccess;
ShareAccess->SharedRead = SharedRead;
ShareAccess->SharedWrite = SharedWrite;
ShareAccess->SharedDelete = SharedDelete;
}
}
/*
* @unimplemented
*/
VOID
STDCALL
IoCancelFileOpen(IN PDEVICE_OBJECT DeviceObject,
IN PFILE_OBJECT FileObject)
{
UNIMPLEMENTED;
}
/*
* @unimplemented
*/
@@ -1601,25 +1861,7 @@ IoSetFileOrigin(IN PFILE_OBJECT FileObject,
}
/*
* NAME EXPORTED
* NtCreateFile@44
*
* DESCRIPTION
* Entry point to call IoCreateFile with
* default parameters.
*
* ARGUMENTS
* See IoCreateFile.
*
* RETURN VALUE
* See IoCreateFile.
*
* REVISIONS
* 2000-03-25 (ea)
* Code originally in NtCreateFile moved in IoCreateFile.
*
* @implemented
*/
NTSTATUS
@@ -1665,41 +1907,44 @@ NtCreateMailslotFile(OUT PHANDLE FileHandle,
IN PLARGE_INTEGER TimeOut)
{
MAILSLOT_CREATE_PARAMETERS Buffer;
DPRINT("NtCreateMailslotFile(FileHandle 0x%p, DesiredAccess %x, "
"ObjectAttributes 0x%p)\n",
FileHandle,DesiredAccess,ObjectAttributes);
NTSTATUS Status = STATUS_SUCCESS;
PAGED_CODE();
/* Check for Timeout */
if (TimeOut != NULL)
if (DefaultTimeout)
{
/* check if the call came from user mode */
if (KeGetPreviousMode() != KernelMode)
{
NTSTATUS Status = STATUS_SUCCESS;
/* Enter SEH for Probe */
_SEH_TRY
{
Buffer.ReadTimeout = ProbeForReadLargeInteger(TimeOut);
/* Probe the timeout */
Buffer.DefaultTimeout =
ProbeForReadLargeInteger(DefaultTimeout);
}
_SEH_HANDLE
{
/* Get exception code */
Status = _SEH_GetExceptionCode();
}
_SEH_END;
/* Return the exception */
if (!NT_SUCCESS(Status)) return Status;
}
else
{
Buffer.ReadTimeout = *TimeOut;
/* Otherwise, capture directly */
Buffer.DefaultTimeout = *DefaultTimeout;
}
/* Set the correct setting */
Buffer.TimeoutSpecified = TRUE;
}
else
{
/* Tell the FSD we don't have a timeout */
Buffer.TimeoutSpecified = FALSE;
}
@@ -1713,7 +1958,7 @@ NtCreateMailslotFile(OUT PHANDLE FileHandle,
ObjectAttributes,
IoStatusBlock,
NULL,
FILE_ATTRIBUTE_NORMAL,
0,
FILE_SHARE_READ | FILE_SHARE_WRITE,
FILE_CREATE,
CreateOptions,
@@ -1725,58 +1970,63 @@ NtCreateMailslotFile(OUT PHANDLE FileHandle,
}
NTSTATUS
STDCALL
NtCreateNamedPipeFile(PHANDLE FileHandle,
ACCESS_MASK DesiredAccess,
POBJECT_ATTRIBUTES ObjectAttributes,
PIO_STATUS_BLOCK IoStatusBlock,
ULONG ShareAccess,
ULONG CreateDisposition,
ULONG CreateOptions,
ULONG NamedPipeType,
ULONG ReadMode,
ULONG CompletionMode,
ULONG MaximumInstances,
ULONG InboundQuota,
ULONG OutboundQuota,
PLARGE_INTEGER DefaultTimeout)
NTAPI
NtCreateNamedPipeFile(OUT PHANDLE FileHandle,
IN ACCESS_MASK DesiredAccess,
IN POBJECT_ATTRIBUTES ObjectAttributes,
OUT PIO_STATUS_BLOCK IoStatusBlock,
IN ULONG ShareAccess,
IN ULONG CreateDisposition,
IN ULONG CreateOptions,
IN ULONG NamedPipeType,
IN ULONG ReadMode,
IN ULONG CompletionMode,
IN ULONG MaximumInstances,
IN ULONG InboundQuota,
IN ULONG OutboundQuota,
IN PLARGE_INTEGER DefaultTimeout)
{
NAMED_PIPE_CREATE_PARAMETERS Buffer;
DPRINT("NtCreateNamedPipeFile(FileHandle 0x%p, DesiredAccess %x, "
"ObjectAttributes 0x%p)\n",
FileHandle,DesiredAccess,ObjectAttributes);
NTSTATUS Status = STATUS_SUCCESS;
PAGED_CODE();
/* Check for Timeout */
if (DefaultTimeout != NULL)
if (DefaultTimeout)
{
/* check if the call came from user mode */
if (KeGetPreviousMode() != KernelMode)
{
NTSTATUS Status = STATUS_SUCCESS;
/* Enter SEH for Probe */
_SEH_TRY
{
Buffer.DefaultTimeout = ProbeForReadLargeInteger(DefaultTimeout);
/* Probe the timeout */
Buffer.DefaultTimeout =
ProbeForReadLargeInteger(DefaultTimeout);
}
_SEH_HANDLE
{
/* Get exception code */
Status = _SEH_GetExceptionCode();
}
_SEH_END;
/* Return the exception */
if (!NT_SUCCESS(Status)) return Status;
}
else
{
/* Otherwise, capture directly */
Buffer.DefaultTimeout = *DefaultTimeout;
}
/* Set the correct setting */
Buffer.TimeoutSpecified = TRUE;
}
else
{
/* Tell the FSD we don't have a timeout */
Buffer.TimeoutSpecified = FALSE;
}
/* Set Settings */
Buffer.NamedPipeType = NamedPipeType;
@@ -1792,7 +2042,7 @@ NtCreateNamedPipeFile(PHANDLE FileHandle,
ObjectAttributes,
IoStatusBlock,
NULL,
FILE_ATTRIBUTE_NORMAL,
0,
ShareAccess,
CreateDisposition,
CreateOptions,
@@ -1804,58 +2054,27 @@ NtCreateNamedPipeFile(PHANDLE FileHandle,
}
NTSTATUS
STDCALL
NTAPI
NtFlushWriteBuffer(VOID)
{
PAGED_CODE();
/* Call the kernel */
KeFlushWriteBuffer();
return STATUS_SUCCESS;
}
/*
* NAME EXPORTED
* NtOpenFile@24
*
* DESCRIPTION
* Opens an existing file (simpler than NtCreateFile).
*
* ARGUMENTS
* FileHandle (OUT)
* Variable that receives the file handle on return;
*
* DesiredAccess
* Access desired by the caller to the file;
*
* ObjectAttributes
* Structue describing the file to be opened;
*
* IoStatusBlock (OUT)
* Receives details about the result of the
* operation;
*
* ShareAccess
* Type of shared access the caller requires;
*
* OpenOptions
* Options for the file open.
*
* RETURN VALUE
* Status.
*
* NOTE
* Undocumented.
*
* @implemented
*/
NTSTATUS
STDCALL
NtOpenFile(PHANDLE FileHandle,
ACCESS_MASK DesiredAccess,
POBJECT_ATTRIBUTES ObjectAttributes,
PIO_STATUS_BLOCK IoStatusBlock,
ULONG ShareAccess,
ULONG OpenOptions)
NTAPI
NtOpenFile(OUT PHANDLE FileHandle,
IN ACCESS_MASK DesiredAccess,
IN POBJECT_ATTRIBUTES ObjectAttributes,
OUT PIO_STATUS_BLOCK IoStatusBlock,
IN ULONG ShareAccess,
IN ULONG OpenOptions)
{
/* Call the I/O Function */
return IoCreateFile(FileHandle,
@@ -1875,7 +2094,7 @@ NtOpenFile(PHANDLE FileHandle,
}
NTSTATUS
STDCALL
NTAPI
NtQueryAttributesFile(IN POBJECT_ATTRIBUTES ObjectAttributes,
OUT PFILE_BASIC_INFORMATION FileInformation)
{
@@ -1887,7 +2106,7 @@ NtQueryAttributesFile(IN POBJECT_ATTRIBUTES ObjectAttributes,
}
NTSTATUS
STDCALL
NTAPI
NtQueryFullAttributesFile(IN POBJECT_ATTRIBUTES ObjectAttributes,
OUT PFILE_NETWORK_OPEN_INFORMATION FileInformation)
{
@@ -2089,263 +2308,4 @@ NtDeleteFile(IN POBJECT_ATTRIBUTES ObjectAttributes)
return OpenPacket.FinalStatus;
}
/*
* @implemented
*/
BOOLEAN
NTAPI
IoFastQueryNetworkAttributes(IN POBJECT_ATTRIBUTES ObjectAttributes,
IN ACCESS_MASK DesiredAccess,
IN ULONG OpenOptions,
OUT PIO_STATUS_BLOCK IoStatus,
OUT PFILE_NETWORK_OPEN_INFORMATION Buffer)
{
NTSTATUS Status;
DUMMY_FILE_OBJECT DummyFileObject;
HANDLE Handle;
OPEN_PACKET OpenPacket;
PAGED_CODE();
/* Setup the Open Packet */
OpenPacket.Type = IO_TYPE_OPEN_PACKET;
OpenPacket.Size = sizeof(OPEN_PACKET);
OpenPacket.FileObject = NULL;
OpenPacket.FinalStatus = STATUS_SUCCESS;
OpenPacket.Information = 0;
OpenPacket.ParseCheck = 0;
OpenPacket.RelatedFileObject = NULL;
OpenPacket.AllocationSize.QuadPart = 0;
OpenPacket.CreateOptions = OpenOptions | FILE_OPEN_REPARSE_POINT;
OpenPacket.FileAttributes = 0;
OpenPacket.ShareAccess = FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE;
OpenPacket.EaBuffer = NULL;
OpenPacket.EaLength = 0;
OpenPacket.Options = IO_FORCE_ACCESS_CHECK;
OpenPacket.Disposition = FILE_OPEN;
OpenPacket.BasicInformation = NULL;
OpenPacket.NetworkInformation = Buffer;
OpenPacket.CreateFileType = 0;
OpenPacket.MailslotOrPipeParameters = NULL;
OpenPacket.Override = FALSE;
OpenPacket.QueryOnly = TRUE;
OpenPacket.DeleteOnly = FALSE;
OpenPacket.FullAttributes = TRUE;
OpenPacket.DummyFileObject = &DummyFileObject;
OpenPacket.InternalFlags = 0;
/*
* Attempt opening the file. This will call the I/O Parse Routine for
* the File Object (IopParseDevice) which will use the dummy file obejct
* send the IRP to its device object. Note that we have two statuses
* to worry about: the Object Manager's status (in Status) and the I/O
* status, which is in the Open Packet's Final Status, and determined
* by the Parse Check member.
*/
Status = ObOpenObjectByName(ObjectAttributes,
NULL,
KernelMode,
NULL,
DesiredAccess,
&OpenPacket,
&Handle);
if (OpenPacket.ParseCheck != TRUE)
{
/* Parse failed */
IoStatus->Status = Status;
}
else
{
/* Use the Io status */
IoStatus->Status = OpenPacket.FinalStatus;
IoStatus->Information = OpenPacket.Information;
}
/* Return success */
return TRUE;
}
/*
* @implemented
*/
VOID STDCALL
IoUpdateShareAccess(PFILE_OBJECT FileObject,
PSHARE_ACCESS ShareAccess)
{
PAGED_CODE();
if (FileObject->ReadAccess ||
FileObject->WriteAccess ||
FileObject->DeleteAccess)
{
ShareAccess->OpenCount++;
ShareAccess->Readers += FileObject->ReadAccess;
ShareAccess->Writers += FileObject->WriteAccess;
ShareAccess->Deleters += FileObject->DeleteAccess;
ShareAccess->SharedRead += FileObject->SharedRead;
ShareAccess->SharedWrite += FileObject->SharedWrite;
ShareAccess->SharedDelete += FileObject->SharedDelete;
}
}
/*
* @implemented
*/
NTSTATUS STDCALL
IoCheckShareAccess(IN ACCESS_MASK DesiredAccess,
IN ULONG DesiredShareAccess,
IN PFILE_OBJECT FileObject,
IN PSHARE_ACCESS ShareAccess,
IN BOOLEAN Update)
{
BOOLEAN ReadAccess;
BOOLEAN WriteAccess;
BOOLEAN DeleteAccess;
BOOLEAN SharedRead;
BOOLEAN SharedWrite;
BOOLEAN SharedDelete;
PAGED_CODE();
ReadAccess = (DesiredAccess & (FILE_READ_DATA | FILE_EXECUTE)) != 0;
WriteAccess = (DesiredAccess & (FILE_WRITE_DATA | FILE_APPEND_DATA)) != 0;
DeleteAccess = (DesiredAccess & DELETE) != 0;
FileObject->ReadAccess = ReadAccess;
FileObject->WriteAccess = WriteAccess;
FileObject->DeleteAccess = DeleteAccess;
if (ReadAccess || WriteAccess || DeleteAccess)
{
SharedRead = (DesiredShareAccess & FILE_SHARE_READ) != 0;
SharedWrite = (DesiredShareAccess & FILE_SHARE_WRITE) != 0;
SharedDelete = (DesiredShareAccess & FILE_SHARE_DELETE) != 0;
FileObject->SharedRead = SharedRead;
FileObject->SharedWrite = SharedWrite;
FileObject->SharedDelete = SharedDelete;
if ((ReadAccess && (ShareAccess->SharedRead < ShareAccess->OpenCount)) ||
(WriteAccess && (ShareAccess->SharedWrite < ShareAccess->OpenCount)) ||
(DeleteAccess && (ShareAccess->SharedDelete < ShareAccess->OpenCount)) ||
((ShareAccess->Readers != 0) && !SharedRead) ||
((ShareAccess->Writers != 0) && !SharedWrite) ||
((ShareAccess->Deleters != 0) && !SharedDelete))
{
return(STATUS_SHARING_VIOLATION);
}
if (Update)
{
ShareAccess->OpenCount++;
ShareAccess->Readers += ReadAccess;
ShareAccess->Writers += WriteAccess;
ShareAccess->Deleters += DeleteAccess;
ShareAccess->SharedRead += SharedRead;
ShareAccess->SharedWrite += SharedWrite;
ShareAccess->SharedDelete += SharedDelete;
}
}
return(STATUS_SUCCESS);
}
/*
* @implemented
*/
VOID STDCALL
IoRemoveShareAccess(IN PFILE_OBJECT FileObject,
IN PSHARE_ACCESS ShareAccess)
{
PAGED_CODE();
if (FileObject->ReadAccess ||
FileObject->WriteAccess ||
FileObject->DeleteAccess)
{
ShareAccess->OpenCount--;
ShareAccess->Readers -= FileObject->ReadAccess;
ShareAccess->Writers -= FileObject->WriteAccess;
ShareAccess->Deleters -= FileObject->DeleteAccess;
ShareAccess->SharedRead -= FileObject->SharedRead;
ShareAccess->SharedWrite -= FileObject->SharedWrite;
ShareAccess->SharedDelete -= FileObject->SharedDelete;
}
}
/*
* @implemented
*/
VOID STDCALL
IoSetShareAccess(IN ACCESS_MASK DesiredAccess,
IN ULONG DesiredShareAccess,
IN PFILE_OBJECT FileObject,
OUT PSHARE_ACCESS ShareAccess)
{
BOOLEAN ReadAccess;
BOOLEAN WriteAccess;
BOOLEAN DeleteAccess;
BOOLEAN SharedRead;
BOOLEAN SharedWrite;
BOOLEAN SharedDelete;
PAGED_CODE();
ReadAccess = (DesiredAccess & (FILE_READ_DATA | FILE_EXECUTE)) != 0;
WriteAccess = (DesiredAccess & (FILE_WRITE_DATA | FILE_APPEND_DATA)) != 0;
DeleteAccess = (DesiredAccess & DELETE) != 0;
FileObject->ReadAccess = ReadAccess;
FileObject->WriteAccess = WriteAccess;
FileObject->DeleteAccess = DeleteAccess;
if (!ReadAccess && !WriteAccess && !DeleteAccess)
{
ShareAccess->OpenCount = 0;
ShareAccess->Readers = 0;
ShareAccess->Writers = 0;
ShareAccess->Deleters = 0;
ShareAccess->SharedRead = 0;
ShareAccess->SharedWrite = 0;
ShareAccess->SharedDelete = 0;
}
else
{
SharedRead = (DesiredShareAccess & FILE_SHARE_READ) != 0;
SharedWrite = (DesiredShareAccess & FILE_SHARE_WRITE) != 0;
SharedDelete = (DesiredShareAccess & FILE_SHARE_DELETE) != 0;
FileObject->SharedRead = SharedRead;
FileObject->SharedWrite = SharedWrite;
FileObject->SharedDelete = SharedDelete;
ShareAccess->OpenCount = 1;
ShareAccess->Readers = ReadAccess;
ShareAccess->Writers = WriteAccess;
ShareAccess->Deleters = DeleteAccess;
ShareAccess->SharedRead = SharedRead;
ShareAccess->SharedWrite = SharedWrite;
ShareAccess->SharedDelete = SharedDelete;
}
}
/*
* @unimplemented
*/
VOID
STDCALL
IoCancelFileOpen(
IN PDEVICE_OBJECT DeviceObject,
IN PFILE_OBJECT FileObject
)
{
UNIMPLEMENTED;
}
/* EOF */