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- Add Object Header Quota structure/define
- Give Files/Devices a parse routine and currently stubplement it for debugging purposes and trying to figure out a way to kill the IopCreateFile hack. - Implement ObpChargeQuotaForObject. Using a memory breakpoint in WinDBG I've finally found where the OB_FLAG_CREATE_INFO flag gets masked out. Also attempted a very naive quota charging implementation, but it's a guess and probably wrong (but at least it does...something.) svn path=/trunk/; revision=22287
This commit is contained in:
Alex Ionescu
parent
1c378756d0
commit
d7c17c883d
4 changed files with 175 additions and 0 deletions
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@ -98,6 +98,10 @@ Author:
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((POBJECT_HEADER_HANDLE_INFO)(!(h)->HandleInfoOffset ? \
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NULL: ((PCHAR)(h) - (h)->HandleInfoOffset)))
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#define OBJECT_HEADER_TO_QUOTA_INFO(h) \
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((POBJECT_HEADER_QUOTA_INFO)(!(h)->QuotaInfoOffset ? \
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NULL: ((PCHAR)(h) - (h)->QuotaInfoOffset)))
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#define OBJECT_HEADER_TO_CREATOR_INFO(h) \
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((POBJECT_HEADER_CREATOR_INFO)(!((h)->Flags & \
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OB_FLAG_CREATOR_INFO) ? NULL: ((PCHAR)(h) - \
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@ -409,6 +413,14 @@ typedef struct _OBJECT_HEADER_CREATOR_INFO
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USHORT Reserved;
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} OBJECT_HEADER_CREATOR_INFO, *POBJECT_HEADER_CREATOR_INFO;
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typedef struct _OBJECT_HEADER_QUOTA_INFO
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{
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ULONG PagedPoolCharge;
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ULONG NonPagedPoolCharge;
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ULONG SecurityDescriptorCharge;
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PEPROCESS ExclusiveProcess;
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} OBJECT_HEADER_QUOTA_INFO, *POBJECT_HEADER_QUOTA_INFO;
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//
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// Object Header
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//
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@ -26,6 +26,86 @@ SeSetWorldSecurityDescriptor(SECURITY_INFORMATION SecurityInformation,
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/* INTERNAL FUNCTIONS ********************************************************/
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NTSTATUS
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NTAPI
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IopParseDevice(IN PVOID ParseObject,
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IN POBJECT_TYPE ObjectType,
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IN OUT PACCESS_STATE AccessState,
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IN KPROCESSOR_MODE AccessMode,
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IN ULONG Attributes,
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IN OUT PUNICODE_STRING CompleteName,
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IN OUT PUNICODE_STRING RemainingName,
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IN OUT PVOID Context OPTIONAL,
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IN PSECURITY_QUALITY_OF_SERVICE SecurityQos OPTIONAL,
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OUT PVOID *Object)
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{
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DPRINT("IopParseDevice:\n"
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"DeviceObject : %p, Type : %p, TypeName : %wZ\n"
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"FileObject : %p, Type : %p, TypeName : %wZ\n"
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"CompleteName : %wZ, RemainingName : %wZ\n",
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ParseObject,
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ObjectType,
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&ObjectType->Name,
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Context,
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Context ? OBJECT_TO_OBJECT_HEADER(Context)->Type : NULL,
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Context ? &OBJECT_TO_OBJECT_HEADER(Context)->Type->Name: NULL,
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CompleteName,
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RemainingName);
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/*
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* Just clear the object and return success, and ObFindObject will behave
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* just as if we had no parse procedure, so we can debug in peace.
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*/
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*Object = NULL;
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return STATUS_SUCCESS;
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}
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NTSTATUS
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NTAPI
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IopParseFile(IN PVOID ParseObject,
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IN POBJECT_TYPE ObjectType,
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IN OUT PACCESS_STATE AccessState,
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IN KPROCESSOR_MODE AccessMode,
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IN ULONG Attributes,
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IN OUT PUNICODE_STRING CompleteName,
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IN OUT PUNICODE_STRING RemainingName,
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IN OUT PVOID Context OPTIONAL,
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IN PSECURITY_QUALITY_OF_SERVICE SecurityQos OPTIONAL,
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OUT PVOID *Object)
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{
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PVOID DeviceObject;
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/* Get the device object */
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DeviceObject = IoGetRelatedDeviceObject(ParseObject);
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Context = ParseObject;
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DPRINT("IopParseFile:\n"
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"DeviceObject : %p, Type : %p, TypeName : %wZ\n"
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"FileObject : %p, Type : %p, TypeName : %wZ\n"
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"CompleteName : %wZ, RemainingName : %wZ\n",
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DeviceObject,
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OBJECT_TO_OBJECT_HEADER(DeviceObject)->Type,
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&OBJECT_TO_OBJECT_HEADER(DeviceObject)->Type->Name,
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ParseObject,
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ObjectType,
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&ObjectType->Name,
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CompleteName,
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RemainingName);
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/* Call the main routine */
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return IopParseDevice(DeviceObject,
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ObjectType,
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AccessState,
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AccessMode,
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Attributes,
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CompleteName,
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RemainingName,
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Context,
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SecurityQos,
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Object);
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}
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/*
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* NAME INTERNAL
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* IopCreateFile
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@ -51,7 +51,31 @@ VOID INIT_FUNCTION IopInitLookasideLists(VOID);
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#pragma alloc_text(INIT, IoInit3)
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#endif
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NTSTATUS
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NTAPI
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IopParseFile(IN PVOID ParseObject,
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IN PVOID ObjectType,
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IN OUT PACCESS_STATE AccessState,
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IN KPROCESSOR_MODE AccessMode,
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IN ULONG Attributes,
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IN OUT PUNICODE_STRING CompleteName,
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IN OUT PUNICODE_STRING RemainingName,
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IN OUT PVOID Context OPTIONAL,
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IN PSECURITY_QUALITY_OF_SERVICE SecurityQos OPTIONAL,
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OUT PVOID *Object);
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NTSTATUS
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NTAPI
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IopParseDevice(IN PVOID ParseObject,
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IN PVOID ObjectType,
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IN OUT PACCESS_STATE AccessState,
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IN KPROCESSOR_MODE AccessMode,
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IN ULONG Attributes,
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IN OUT PUNICODE_STRING CompleteName,
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IN OUT PUNICODE_STRING RemainingName,
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IN OUT PVOID Context OPTIONAL,
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IN PSECURITY_QUALITY_OF_SERVICE SecurityQos OPTIONAL,
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OUT PVOID *Object);
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/* INIT FUNCTIONS ************************************************************/
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VOID
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@ -210,6 +234,7 @@ IoInit (VOID)
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ObjectTypeInitializer.ValidAccessMask = FILE_ALL_ACCESS;
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ObjectTypeInitializer.UseDefaultObject = TRUE;
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ObjectTypeInitializer.GenericMapping = IopFileMapping;
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ObjectTypeInitializer.ParseProcedure = IopParseDevice;
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ObCreateObjectType(&Name, &ObjectTypeInitializer, NULL, &IoDeviceObjectType);
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/* Do the Adapter Type */
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@ -229,6 +254,7 @@ IoInit (VOID)
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ObjectTypeInitializer.DeleteProcedure = IopDeleteFile;
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ObjectTypeInitializer.SecurityProcedure = IopSecurityFile;
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ObjectTypeInitializer.QueryNameProcedure = IopQueryNameFile;
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ObjectTypeInitializer.ParseProcedure = IopParseFile;
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ObjectTypeInitializer.UseDefaultObject = FALSE;
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ObCreateObjectType(&Name, &ObjectTypeInitializer, NULL, &IoFileObjectType);
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@ -27,6 +27,50 @@ PHANDLE_TABLE ObpKernelHandleTable = NULL;
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/* PRIVATE FUNCTIONS *********************************************************/
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NTSTATUS
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NTAPI
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ObpChargeQuotaForObject(IN POBJECT_HEADER ObjectHeader,
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IN POBJECT_TYPE ObjectType)
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{
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POBJECT_HEADER_QUOTA_INFO ObjectQuota;
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ULONG PagedPoolCharge, NonPagedPoolCharge;
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PEPROCESS Process;
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/* Get quota information */
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ObjectQuota = OBJECT_HEADER_TO_QUOTA_INFO(ObjectHeader);
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/* Check if this is a new object */
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if (ObjectHeader->Flags & OB_FLAG_CREATE_INFO)
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{
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/* Remove the flag */
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ObjectHeader->Flags &= ~ OB_FLAG_CREATE_INFO;
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if (ObjectQuota)
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{
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/* We have a quota, get the charges */
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PagedPoolCharge = ObjectQuota->PagedPoolCharge;
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NonPagedPoolCharge = ObjectQuota->NonPagedPoolCharge;
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}
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else
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{
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/* Get it from the object type */
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PagedPoolCharge = ObjectType->TypeInfo.DefaultPagedPoolCharge;
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NonPagedPoolCharge = ObjectType->TypeInfo.DefaultNonPagedPoolCharge;
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}
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/*
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* Charge the quota
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* FIXME: This is a *COMPLETE* guess and probably defintely not the way to do this.
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*/
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Process = PsGetCurrentProcess();
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Process->QuotaBlock->QuotaEntry[PagedPool].Usage += PagedPoolCharge;
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Process->QuotaBlock->QuotaEntry[NonPagedPool].Usage += NonPagedPoolCharge;
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ObjectHeader->QuotaBlockCharged = Process->QuotaBlock;
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}
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/* Return success */
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return STATUS_SUCCESS;
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}
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/*++
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* @name ObpDecrementHandleCount
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*
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@ -247,6 +291,7 @@ ObpIncrementHandleCount(IN PVOID Object,
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POBJECT_HEADER ObjectHeader;
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POBJECT_TYPE ObjectType;
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ULONG ProcessHandleCount;
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NTSTATUS Status;
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/* Get the object header and type */
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ObjectHeader = OBJECT_TO_OBJECT_HEADER(Object);
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@ -258,6 +303,10 @@ ObpIncrementHandleCount(IN PVOID Object,
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ObjectHeader->HandleCount,
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ObjectHeader->PointerCount);
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/* Charge quota and remove the creator info flag */
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Status = ObpChargeQuotaForObject(ObjectHeader, ObjectType);
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if (!NT_SUCCESS(Status)) return Status;
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/* Check if we're opening an existing handle */
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if (OpenReason == ObOpenHandle)
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{
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@ -1151,6 +1200,14 @@ ObOpenObjectByName(IN POBJECT_ATTRIBUTES ObjectAttributes,
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{
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/* Then we are creating a new handle */
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OpenReason = ObCreateHandle;
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/* Check if we still have create info */
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if (ObjectHeader->ObjectCreateInfo)
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{
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/* Free it */
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//ObpFreeAndReleaseCapturedAttributes(&ObjectCreateInfo);
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//ObjectHeader->ObjectCreateInfo = NULL;
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}
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}
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else
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{
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