mirror of
https://github.com/reactos/reactos.git
synced 2025-04-20 20:36:35 +00:00
- Formatting/name/comment/declaration/calling convention changes.
- Make ObpCreateHandleTable return NTSTATUS instead of VOID, so that it can return STATUS_INSUFFIENT_RESOURCES if the handle table couldn't be allocated. svn path=/trunk/; revision=22249
This commit is contained in:
Alex Ionescu
parent
7fff40f524
commit
a25a59160d
4 changed files with 220 additions and 216 deletions
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@ -42,25 +42,33 @@ extern NPAGED_LOOKASIDE_LIST ObpNmLookasideList, ObpCiLookasideList;
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BOOLEAN
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NTAPI
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ObpDeleteEntryDirectory(POBP_LOOKUP_CONTEXT Context);
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ObpDeleteEntryDirectory(
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IN POBP_LOOKUP_CONTEXT Context
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);
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BOOLEAN
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NTAPI
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ObpInsertEntryDirectory(IN POBJECT_DIRECTORY Parent,
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IN POBP_LOOKUP_CONTEXT Context,
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IN POBJECT_HEADER ObjectHeader);
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ObpInsertEntryDirectory(
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IN POBJECT_DIRECTORY Parent,
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IN POBP_LOOKUP_CONTEXT Context,
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IN POBJECT_HEADER ObjectHeader
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);
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PVOID
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NTAPI
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ObpLookupEntryDirectory(IN POBJECT_DIRECTORY Directory,
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IN PUNICODE_STRING Name,
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IN ULONG Attributes,
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IN UCHAR SearchShadow,
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IN POBP_LOOKUP_CONTEXT Context);
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ObpLookupEntryDirectory(
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IN POBJECT_DIRECTORY Directory,
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IN PUNICODE_STRING Name,
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IN ULONG Attributes,
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IN UCHAR SearchShadow,
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IN POBP_LOOKUP_CONTEXT Context
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);
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VOID
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NTAPI
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ObInitSymbolicLinkImplementation(VOID);
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ObInitSymbolicLinkImplementation(
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VOID
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);
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NTSTATUS
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NTAPI
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@ -73,21 +81,15 @@ ObpCreateHandle(
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NTSTATUS
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NTAPI
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ObpParseDirectory(
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PVOID Object,
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PVOID * NextObject,
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PUNICODE_STRING FullPath,
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PWSTR * Path,
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ULONG Attributes,
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POBP_LOOKUP_CONTEXT Context
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ObpCreateHandleTable(
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IN PEPROCESS Parent,
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IN PEPROCESS Process
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);
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VOID
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NTAPI
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ObCreateHandleTable(
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struct _EPROCESS* Parent,
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BOOLEAN Inherit,
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struct _EPROCESS* Process
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ObKillProcess(
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IN PEPROCESS Process
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);
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NTSTATUS
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@ -137,10 +139,10 @@ NTAPI
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ObpGetHandleCountByHandleTable(PHANDLE_TABLE HandleTable);
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VOID
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STDCALL
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NTAPI
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ObQueryDeviceMapInformation(
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PEPROCESS Process,
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PPROCESS_DEVICEMAP_INFORMATION DeviceMapInfo
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IN PEPROCESS Process,
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OUT PPROCESS_DEVICEMAP_INFORMATION DeviceMapInfo
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);
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VOID
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@ -150,10 +152,6 @@ ObpSetPermanentObject(
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IN BOOLEAN Permanent
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);
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VOID
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STDCALL
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ObKillProcess(PEPROCESS Process);
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VOID
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FASTCALL
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ObpDeleteObject(
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@ -323,6 +323,106 @@ ObpDeleteHandle(HANDLE Handle)
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return Status;
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}
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NTSTATUS
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NTAPI
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ObpCreateHandle(PVOID ObjectBody,
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ACCESS_MASK GrantedAccess,
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ULONG HandleAttributes,
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PHANDLE HandleReturn)
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/*
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* FUNCTION: Add a handle referencing an object
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* ARGUMENTS:
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* obj = Object body that the handle should refer to
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* RETURNS: The created handle
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* NOTE: The handle is valid only in the context of the current process
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*/
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{
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HANDLE_TABLE_ENTRY NewEntry;
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PEPROCESS Process, CurrentProcess;
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POBJECT_HEADER ObjectHeader;
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HANDLE Handle;
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KAPC_STATE ApcState;
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BOOLEAN AttachedToProcess = FALSE;
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PAGED_CODE();
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DPRINT("ObpCreateHandle(obj %p)\n",ObjectBody);
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ASSERT(ObjectBody);
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CurrentProcess = PsGetCurrentProcess();
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ObjectHeader = OBJECT_TO_OBJECT_HEADER(ObjectBody);
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/* check that this is a valid kernel pointer */
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ASSERT((ULONG_PTR)ObjectHeader & EX_HANDLE_ENTRY_LOCKED);
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if (GrantedAccess & MAXIMUM_ALLOWED)
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{
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GrantedAccess &= ~MAXIMUM_ALLOWED;
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GrantedAccess |= GENERIC_ALL;
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}
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if (GrantedAccess & GENERIC_ACCESS)
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{
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RtlMapGenericMask(&GrantedAccess,
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&ObjectHeader->Type->TypeInfo.GenericMapping);
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}
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NewEntry.Object = ObjectHeader;
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if(HandleAttributes & OBJ_INHERIT)
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NewEntry.ObAttributes |= EX_HANDLE_ENTRY_INHERITABLE;
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else
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NewEntry.ObAttributes &= ~EX_HANDLE_ENTRY_INHERITABLE;
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NewEntry.GrantedAccess = GrantedAccess;
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if ((HandleAttributes & OBJ_KERNEL_HANDLE) &&
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ExGetPreviousMode == KernelMode)
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{
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Process = PsInitialSystemProcess;
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if (Process != CurrentProcess)
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{
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KeStackAttachProcess(&Process->Pcb,
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&ApcState);
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AttachedToProcess = TRUE;
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}
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}
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else
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{
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Process = CurrentProcess;
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/* mask out the OBJ_KERNEL_HANDLE attribute */
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HandleAttributes &= ~OBJ_KERNEL_HANDLE;
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}
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Handle = ExCreateHandle(Process->ObjectTable,
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&NewEntry);
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if (AttachedToProcess)
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{
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KeUnstackDetachProcess(&ApcState);
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}
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if(Handle != NULL)
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{
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if (HandleAttributes & OBJ_KERNEL_HANDLE)
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{
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/* mark the handle value */
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Handle = ObMarkHandleAsKernelHandle(Handle);
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}
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if(InterlockedIncrement(&ObjectHeader->HandleCount) == 1)
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{
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ObReferenceObject(ObjectBody);
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}
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*HandleReturn = Handle;
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return STATUS_SUCCESS;
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}
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return STATUS_UNSUCCESSFUL;
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}
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/*++
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* @name ObpSetHandleAttributes
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*
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@ -389,6 +489,98 @@ ObpSetHandleAttributes(IN PHANDLE_TABLE HandleTable,
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return TRUE;
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}
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VOID
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NTAPI
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ObpCloseHandleCallback(IN PHANDLE_TABLE HandleTable,
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IN PVOID Object,
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IN ULONG GrantedAccess,
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IN PVOID Context)
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{
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PAGED_CODE();
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/* Simply decrement the handle count */
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ObpDecrementHandleCount(&EX_OBJ_TO_HDR(Object)->Body,
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PsGetCurrentProcess(),
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GrantedAccess);
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}
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BOOLEAN
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NTAPI
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ObpDuplicateHandleCallback(IN PHANDLE_TABLE HandleTable,
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IN PHANDLE_TABLE_ENTRY HandleTableEntry,
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IN PVOID Context)
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{
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POBJECT_HEADER ObjectHeader;
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BOOLEAN Ret = FALSE;
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PAGED_CODE();
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/* Make sure that the handle is inheritable */
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Ret = (HandleTableEntry->ObAttributes & EX_HANDLE_ENTRY_INHERITABLE) != 0;
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if(Ret)
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{
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/* Get the object header and increment the handle and pointer counts */
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ObjectHeader = EX_HTE_TO_HDR(HandleTableEntry);
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InterlockedIncrement(&ObjectHeader->HandleCount);
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InterlockedIncrement(&ObjectHeader->PointerCount);
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}
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/* Return duplication result */
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return Ret;
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}
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NTSTATUS
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NTAPI
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ObpCreateHandleTable(IN PEPROCESS Parent,
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IN PEPROCESS Process)
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{
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PHANDLE_TABLE HandleTable;
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PAGED_CODE();
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/* Check if we have a parent */
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if (Parent)
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{
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/* Duplicate the parent's */
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HandleTable = ExDupHandleTable(Process,
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ObpDuplicateHandleCallback,
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NULL,
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Parent->ObjectTable);
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}
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else
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{
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/* Create a new one */
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HandleTable = ExCreateHandleTable(Process);
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}
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/* Now write it and make sure we got one */
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Process->ObjectTable = HandleTable;
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if (!HandleTable) return STATUS_INSUFFICIENT_RESOURCES;
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/* If we got here then the table was created OK */
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return STATUS_SUCCESS;
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}
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VOID
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NTAPI
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ObKillProcess(IN PEPROCESS Process)
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{
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PAGED_CODE();
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/* Enter a critical region */
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KeEnterCriticalRegion();
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/* Sweep the handle table to close all handles */
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ExSweepHandleTable(Process->ObjectTable,
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ObpCloseHandleCallback,
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Process);
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/* Destroy the table and leave the critical region */
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ExDestroyHandleTable(Process->ObjectTable);
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KeLeaveCriticalRegion();
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/* Clear the object table */
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Process->ObjectTable = NULL;
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}
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NTSTATUS
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NTAPI
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ObDuplicateObject(PEPROCESS SourceProcess,
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@ -546,192 +738,6 @@ ObDuplicateObject(PEPROCESS SourceProcess,
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return Status;
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}
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static VOID STDCALL
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SweepHandleCallback(PHANDLE_TABLE HandleTable,
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PVOID Object,
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ULONG GrantedAccess,
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PVOID Context)
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{
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POBJECT_HEADER ObjectHeader;
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PVOID ObjectBody;
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PAGED_CODE();
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ObjectHeader = EX_OBJ_TO_HDR(Object);
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ObjectBody = &ObjectHeader->Body;
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ObpDecrementHandleCount(ObjectBody, PsGetCurrentProcess(), GrantedAccess);
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}
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static BOOLEAN STDCALL
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DuplicateHandleCallback(PHANDLE_TABLE HandleTable,
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PHANDLE_TABLE_ENTRY HandleTableEntry,
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PVOID Context)
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{
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POBJECT_HEADER ObjectHeader;
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BOOLEAN Ret = FALSE;
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PAGED_CODE();
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Ret = (HandleTableEntry->ObAttributes & EX_HANDLE_ENTRY_INHERITABLE) != 0;
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if(Ret)
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{
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ObjectHeader = EX_HTE_TO_HDR(HandleTableEntry);
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if(InterlockedIncrement(&ObjectHeader->HandleCount) == 1)
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{
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ObReferenceObject(&ObjectHeader->Body);
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}
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}
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return Ret;
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}
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VOID
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NTAPI
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ObCreateHandleTable(PEPROCESS Parent,
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BOOLEAN Inherit,
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PEPROCESS Process)
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/*
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* FUNCTION: Creates a handle table for a process
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* ARGUMENTS:
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* Parent = Parent process (or NULL if this is the first process)
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* Inherit = True if the process should inherit its parent's handles
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* Process = Process whose handle table is to be created
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*/
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{
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PAGED_CODE();
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DPRINT("ObCreateHandleTable(Parent %x, Inherit %d, Process %x)\n",
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Parent,Inherit,Process);
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if(Parent != NULL)
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{
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Process->ObjectTable = ExDupHandleTable(Process,
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DuplicateHandleCallback,
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NULL,
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Parent->ObjectTable);
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}
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else
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{
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Process->ObjectTable = ExCreateHandleTable(Process);
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}
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}
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VOID
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STDCALL
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ObKillProcess(PEPROCESS Process)
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{
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PAGED_CODE();
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/* FIXME - Temporary hack: sweep and destroy here, needs to be fixed!!! */
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ExSweepHandleTable(Process->ObjectTable,
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SweepHandleCallback,
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Process);
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ExDestroyHandleTable(Process->ObjectTable);
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Process->ObjectTable = NULL;
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}
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NTSTATUS
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NTAPI
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ObpCreateHandle(PVOID ObjectBody,
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ACCESS_MASK GrantedAccess,
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ULONG HandleAttributes,
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PHANDLE HandleReturn)
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/*
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* FUNCTION: Add a handle referencing an object
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* ARGUMENTS:
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* obj = Object body that the handle should refer to
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* RETURNS: The created handle
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* NOTE: The handle is valid only in the context of the current process
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*/
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{
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HANDLE_TABLE_ENTRY NewEntry;
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PEPROCESS Process, CurrentProcess;
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POBJECT_HEADER ObjectHeader;
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HANDLE Handle;
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KAPC_STATE ApcState;
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BOOLEAN AttachedToProcess = FALSE;
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PAGED_CODE();
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DPRINT("ObpCreateHandle(obj %p)\n",ObjectBody);
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ASSERT(ObjectBody);
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CurrentProcess = PsGetCurrentProcess();
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ObjectHeader = OBJECT_TO_OBJECT_HEADER(ObjectBody);
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/* check that this is a valid kernel pointer */
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ASSERT((ULONG_PTR)ObjectHeader & EX_HANDLE_ENTRY_LOCKED);
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if (GrantedAccess & MAXIMUM_ALLOWED)
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{
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GrantedAccess &= ~MAXIMUM_ALLOWED;
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GrantedAccess |= GENERIC_ALL;
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}
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if (GrantedAccess & GENERIC_ACCESS)
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{
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RtlMapGenericMask(&GrantedAccess,
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&ObjectHeader->Type->TypeInfo.GenericMapping);
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}
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NewEntry.Object = ObjectHeader;
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if(HandleAttributes & OBJ_INHERIT)
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NewEntry.ObAttributes |= EX_HANDLE_ENTRY_INHERITABLE;
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else
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NewEntry.ObAttributes &= ~EX_HANDLE_ENTRY_INHERITABLE;
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NewEntry.GrantedAccess = GrantedAccess;
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if ((HandleAttributes & OBJ_KERNEL_HANDLE) &&
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ExGetPreviousMode == KernelMode)
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{
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Process = PsInitialSystemProcess;
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if (Process != CurrentProcess)
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{
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KeStackAttachProcess(&Process->Pcb,
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&ApcState);
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AttachedToProcess = TRUE;
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}
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}
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else
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{
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Process = CurrentProcess;
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/* mask out the OBJ_KERNEL_HANDLE attribute */
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HandleAttributes &= ~OBJ_KERNEL_HANDLE;
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}
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Handle = ExCreateHandle(Process->ObjectTable,
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&NewEntry);
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if (AttachedToProcess)
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{
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KeUnstackDetachProcess(&ApcState);
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}
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if(Handle != NULL)
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{
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if (HandleAttributes & OBJ_KERNEL_HANDLE)
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{
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/* mark the handle value */
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Handle = ObMarkHandleAsKernelHandle(Handle);
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}
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if(InterlockedIncrement(&ObjectHeader->HandleCount) == 1)
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{
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ObReferenceObject(ObjectBody);
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}
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*HandleReturn = Handle;
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return STATUS_SUCCESS;
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}
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return STATUS_UNSUCCESSFUL;
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}
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/* PUBLIC FUNCTIONS *********************************************************/
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NTSTATUS
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@ -340,7 +340,7 @@ PspCreateProcess(OUT PHANDLE ProcessHandle,
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/* Create or Clone the Handle Table */
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DPRINT("Initialzing Process Handle Table\n");
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ObCreateHandleTable(pParentProcess, InheritObjectTable, Process);
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ObpCreateHandleTable(pParentProcess, Process);
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DPRINT("Handle Table: %x\n", Process->ObjectTable);
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/* Set Process's Directory Base */
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@ -303,7 +303,7 @@ PspPostInitSystemProcess(VOID)
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process a PID */
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PsInitClientIDManagment();
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ObCreateHandleTable(NULL, FALSE, PsInitialSystemProcess);
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ObpCreateHandleTable(NULL, PsInitialSystemProcess);
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ObpKernelHandleTable = PsInitialSystemProcess->ObjectTable;
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CidEntry.Object = PsInitialSystemProcess;
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