mirror of
https://github.com/reactos/reactos.git
synced 2024-07-03 11:14:33 +00:00
- Documented ObpDeleteNameCheck and ObpSetPermanentObject
- Added function documentation header for ObpDecrementHandleCount and ObpSetHandleAttributes - Modified ObpDecrementHandleCount to accept Process and GrantedAccess paraemters since the definition for the Close Procedure Callback requires them (and we were currently sending NULL). Also send 0 for process handle count, since we don't yet parse/support per-process handle databases. - Minor optimization: All objects have an object type, don't actually check if the object has one when decrementing a handle. - Minor accounting fix: Decrement the total number of handles for the object type whose handle count is being decreased. svn path=/trunk/; revision=22245
This commit is contained in:
Alex Ionescu
parent
afea80bbe4
commit
18ed42b8a4
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@ -19,8 +19,64 @@
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PHANDLE_TABLE ObpKernelHandleTable = NULL;
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/* UGLY FUNCTIONS ************************************************************/
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ULONG
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NTAPI
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ObpGetHandleCountByHandleTable(PHANDLE_TABLE HandleTable)
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{
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return HandleTable->HandleCount;
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}
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VOID
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ObpGetNextHandleByProcessCount(PSYSTEM_HANDLE_TABLE_ENTRY_INFO pshi,
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PEPROCESS Process,
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int Count)
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{
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ULONG P;
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// KIRQL oldIrql;
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// pshi->HandleValue;
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/*
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This will never work with ROS! M$, I guess uses 0 -> 65535.
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Ros uses 0 -> 4294967295!
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*/
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P = (ULONG) Process->UniqueProcessId;
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pshi->UniqueProcessId = (USHORT) P;
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// KeAcquireSpinLock( &Process->HandleTable.ListLock, &oldIrql );
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// pshi->GrantedAccess;
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// pshi->Object;
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// pshi->TypeIndex;
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// pshi->HandleAttributes;
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// KeReleaseSpinLock( &Process->HandleTable.ListLock, oldIrql );
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return;
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}
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/* PRIVATE FUNCTIONS *********************************************************/
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/*++
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* @name ObpDeleteNameCheck
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*
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* The ObpDeleteNameCheck routine checks if a named object should be
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* removed from the object directory namespace.
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*
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* @param Object
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* Pointer to the object to check for possible removal.
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*
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* @return None.
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*
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* @remarks An object is removed if the following 4 criteria are met:
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* 1) The object has 0 handles open
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* 2) The object is in the directory namespace and has a name
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* 3) The object is not permanent
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*
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*--*/
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VOID
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NTAPI
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ObpDeleteNameCheck(IN PVOID Object)
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@ -88,17 +144,19 @@ ObpDeleteNameCheck(IN PVOID Object)
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/*++
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* @name ObpSetPermanentObject
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*
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* The ObpSetPermanentObject routine <FILLMEIN>
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* The ObpSetPermanentObject routine makes an sets or clears the permanent
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* flag of an object, thus making it either permanent or temporary.
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*
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* @param ObjectBody
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* <FILLMEIN>
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* Pointer to the object to make permanent or temporary.
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*
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* @param Permanent
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* <FILLMEIN>
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* Flag specifying which operation to perform.
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*
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* @return None.
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*
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* @remarks None.
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* @remarks If the object is being made temporary, then it will be checked
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* as a candidate for immediate removal from the namespace.
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*
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*--*/
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VOID
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@ -125,63 +183,133 @@ ObpSetPermanentObject(IN PVOID ObjectBody,
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}
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}
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ULONG
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NTAPI
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ObpGetHandleCountByHandleTable(PHANDLE_TABLE HandleTable)
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{
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return HandleTable->HandleCount;
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}
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/*++
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* @name ObpDecrementHandleCount
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*
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* The ObpDecrementHandleCount routine <FILLMEIN>
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*
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* @param ObjectBody
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* <FILLMEIN>.
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*
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* @param Process
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* <FILLMEIN>.
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*
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* @param GrantedAccess
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* <FILLMEIN>.
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*
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* @return None.
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*
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* @remarks None.
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*
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*--*/
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VOID
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ObpGetNextHandleByProcessCount(PSYSTEM_HANDLE_TABLE_ENTRY_INFO pshi,
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PEPROCESS Process,
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int Count)
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NTAPI
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ObpDecrementHandleCount(IN PVOID ObjectBody,
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IN PEPROCESS Process,
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IN ACCESS_MASK GrantedAccess)
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{
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ULONG P;
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// KIRQL oldIrql;
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POBJECT_HEADER ObjectHeader;
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POBJECT_TYPE ObjectType;
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LONG SystemHandleCount, ProcessHandleCount;
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// pshi->HandleValue;
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/* Get the object type and header */
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ObjectHeader = OBJECT_TO_OBJECT_HEADER(ObjectBody);
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ObjectType = ObjectHeader->Type;
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/*
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This will never work with ROS! M$, I guess uses 0 -> 65535.
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Ros uses 0 -> 4294967295!
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*/
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/* FIXME: The process handle count should be in the Handle DB. Investigate */
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SystemHandleCount = ObjectHeader->HandleCount;
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ProcessHandleCount = 0;
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P = (ULONG) Process->UniqueProcessId;
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pshi->UniqueProcessId = (USHORT) P;
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/* Decrement the handle count */
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InterlockedDecrement(&ObjectHeader->HandleCount);
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// KeAcquireSpinLock( &Process->HandleTable.ListLock, &oldIrql );
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// pshi->GrantedAccess;
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// pshi->Object;
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// pshi->TypeIndex;
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// pshi->HandleAttributes;
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// KeReleaseSpinLock( &Process->HandleTable.ListLock, oldIrql );
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return;
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}
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static VOID
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ObpDecrementHandleCount(PVOID ObjectBody)
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{
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POBJECT_HEADER ObjectHeader = OBJECT_TO_OBJECT_HEADER(ObjectBody);
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LONG NewHandleCount = InterlockedDecrement(&ObjectHeader->HandleCount);
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DPRINT("Header: %x\n", ObjectHeader);
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DPRINT("NewHandleCount: %x\n", NewHandleCount);
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DPRINT("OBJECT_HEADER_TO_NAME_INFO: %x\n", OBJECT_HEADER_TO_NAME_INFO(ObjectHeader));
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if ((ObjectHeader->Type != NULL) &&
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(ObjectHeader->Type->TypeInfo.CloseProcedure != NULL))
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/* Check if we have a close procedure */
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if (ObjectType->TypeInfo.CloseProcedure)
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{
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/* the handle count should be decremented but we pass the previous value
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to the callback */
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ObjectHeader->Type->TypeInfo.CloseProcedure(NULL, ObjectBody, 0, NewHandleCount + 1, NewHandleCount + 1);
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/* Call it */
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ObjectType->TypeInfo.CloseProcedure(Process,
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ObjectBody,
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GrantedAccess,
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ProcessHandleCount,
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SystemHandleCount);
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}
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/* Check if we should delete the object */
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ObpDeleteNameCheck(ObjectBody);
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/* Decrease the total number of handles for this type */
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ObjectType->TotalNumberOfHandles--;
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}
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static NTSTATUS
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ObpDeleteHandle(HANDLE Handle)
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{
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PHANDLE_TABLE_ENTRY HandleEntry;
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PVOID Body;
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POBJECT_HEADER ObjectHeader;
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PHANDLE_TABLE ObjectTable;
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ACCESS_MASK GrantedAccess;
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PAGED_CODE();
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DPRINT("ObpDeleteHandle(Handle %p)\n",Handle);
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ObjectTable = PsGetCurrentProcess()->ObjectTable;
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KeEnterCriticalRegion();
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HandleEntry = ExMapHandleToPointer(ObjectTable,
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Handle);
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if(HandleEntry != NULL)
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{
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if(HandleEntry->ObAttributes & EX_HANDLE_ENTRY_PROTECTFROMCLOSE)
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{
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ExUnlockHandleTableEntry(ObjectTable,
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HandleEntry);
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KeLeaveCriticalRegion();
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return STATUS_HANDLE_NOT_CLOSABLE;
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}
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ObjectHeader = EX_HTE_TO_HDR(HandleEntry);
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Body = &ObjectHeader->Body;
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GrantedAccess = HandleEntry->GrantedAccess;
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/* destroy and unlock the handle entry */
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ExDestroyHandleByEntry(ObjectTable,
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HandleEntry,
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Handle);
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ObpDecrementHandleCount(Body, PsGetCurrentProcess(), GrantedAccess);
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KeLeaveCriticalRegion();
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return STATUS_SUCCESS;
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}
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KeLeaveCriticalRegion();
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return STATUS_INVALID_HANDLE;
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}
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/*++
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* @name ObpSetHandleAttributes
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*
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* The ObpSetHandleAttributes routine <FILLMEIN>
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*
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* @param HandleTable
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* <FILLMEIN>.
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*
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* @param HandleTableEntry
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* <FILLMEIN>.
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*
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* @param Context
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* <FILLMEIN>.
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*
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* @return <FILLMEIN>.
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*
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* @remarks None.
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*
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*--*/
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BOOLEAN
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NTAPI
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ObpSetHandleAttributes(IN PHANDLE_TABLE HandleTable,
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@ -229,54 +357,6 @@ ObpSetHandleAttributes(IN PHANDLE_TABLE HandleTable,
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return TRUE;
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}
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static NTSTATUS
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ObpDeleteHandle(HANDLE Handle)
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{
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PHANDLE_TABLE_ENTRY HandleEntry;
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PVOID Body;
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POBJECT_HEADER ObjectHeader;
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PHANDLE_TABLE ObjectTable;
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PAGED_CODE();
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DPRINT("ObpDeleteHandle(Handle %p)\n",Handle);
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ObjectTable = PsGetCurrentProcess()->ObjectTable;
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KeEnterCriticalRegion();
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HandleEntry = ExMapHandleToPointer(ObjectTable,
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Handle);
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if(HandleEntry != NULL)
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{
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if(HandleEntry->ObAttributes & EX_HANDLE_ENTRY_PROTECTFROMCLOSE)
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{
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ExUnlockHandleTableEntry(ObjectTable,
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HandleEntry);
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KeLeaveCriticalRegion();
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return STATUS_HANDLE_NOT_CLOSABLE;
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}
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ObjectHeader = EX_HTE_TO_HDR(HandleEntry);
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Body = &ObjectHeader->Body;
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/* destroy and unlock the handle entry */
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ExDestroyHandleByEntry(ObjectTable,
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HandleEntry,
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Handle);
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ObpDecrementHandleCount(Body);
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KeLeaveCriticalRegion();
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return STATUS_SUCCESS;
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}
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KeLeaveCriticalRegion();
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return STATUS_INVALID_HANDLE;
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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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@ -448,7 +528,7 @@ SweepHandleCallback(PHANDLE_TABLE HandleTable,
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ObjectHeader = EX_OBJ_TO_HDR(Object);
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ObjectBody = &ObjectHeader->Body;
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ObpDecrementHandleCount(ObjectBody);
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ObpDecrementHandleCount(ObjectBody, PsGetCurrentProcess(), GrantedAccess);
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}
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static BOOLEAN STDCALL
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