mirror of
https://github.com/reactos/reactos.git
synced 2024-12-30 19:14:31 +00:00
4c63ed5a7a
- Disentangle the usage of ObpAcquireDirectoryLockExclusive() when it's used only for accessing a directory structure, or as part of a lookup operation. The Obp*DirectoryLock*() -- both shared and exclusive -- functions are only for locking an OB directory, for reading or writing its structure members. When performing lookup operations (insertions/deletions of entries within a directory), use a ObpAcquireLookupContextLock() function that exclusively locks the directory and saves extra lock state, that can be used by ObpReleaseLookupContextObject() for cleanup. - Add documentation for these functions.
437 lines
15 KiB
C
437 lines
15 KiB
C
/*
|
|
* PROJECT: ReactOS Kernel
|
|
* LICENSE: GPL - See COPYING in the top level directory
|
|
* FILE: ntoskrnl/ob/obinit.c
|
|
* PURPOSE: Handles Object Manager Initialization and Shutdown
|
|
* PROGRAMMERS: Alex Ionescu (alex.ionescu@reactos.org)
|
|
* Eric Kohl
|
|
* Thomas Weidenmueller (w3seek@reactos.org)
|
|
*/
|
|
|
|
/* INCLUDES ******************************************************************/
|
|
|
|
#include <ntoskrnl.h>
|
|
#define NDEBUG
|
|
#include <debug.h>
|
|
|
|
/* GLOBALS *******************************************************************/
|
|
|
|
GENERIC_MAPPING ObpTypeMapping =
|
|
{
|
|
STANDARD_RIGHTS_READ,
|
|
STANDARD_RIGHTS_WRITE,
|
|
STANDARD_RIGHTS_EXECUTE,
|
|
0x000F0001
|
|
};
|
|
|
|
GENERIC_MAPPING ObpDirectoryMapping =
|
|
{
|
|
STANDARD_RIGHTS_READ | DIRECTORY_QUERY |
|
|
DIRECTORY_TRAVERSE,
|
|
STANDARD_RIGHTS_WRITE | DIRECTORY_CREATE_SUBDIRECTORY |
|
|
DIRECTORY_CREATE_OBJECT,
|
|
STANDARD_RIGHTS_EXECUTE | DIRECTORY_QUERY |
|
|
DIRECTORY_TRAVERSE,
|
|
DIRECTORY_ALL_ACCESS
|
|
};
|
|
|
|
GENERIC_MAPPING ObpSymbolicLinkMapping =
|
|
{
|
|
STANDARD_RIGHTS_READ | SYMBOLIC_LINK_QUERY,
|
|
STANDARD_RIGHTS_WRITE,
|
|
STANDARD_RIGHTS_EXECUTE | SYMBOLIC_LINK_QUERY,
|
|
SYMBOLIC_LINK_ALL_ACCESS
|
|
};
|
|
|
|
PDEVICE_MAP ObSystemDeviceMap = NULL;
|
|
ULONG ObpTraceLevel = 0;
|
|
|
|
CODE_SEG("INIT")
|
|
VOID
|
|
NTAPI
|
|
PsInitializeQuotaSystem(VOID);
|
|
|
|
ULONG ObpInitializationPhase;
|
|
|
|
ULONG ObpObjectSecurityMode = 0;
|
|
ULONG ObpProtectionMode = 0;
|
|
|
|
/* PRIVATE FUNCTIONS *********************************************************/
|
|
|
|
static
|
|
CODE_SEG("INIT")
|
|
NTSTATUS
|
|
NTAPI
|
|
ObpCreateKernelObjectsSD(OUT PSECURITY_DESCRIPTOR *SecurityDescriptor)
|
|
{
|
|
PSECURITY_DESCRIPTOR Sd = NULL;
|
|
PACL Dacl;
|
|
ULONG AclSize, SdSize;
|
|
NTSTATUS Status;
|
|
|
|
AclSize = sizeof(ACL) +
|
|
sizeof(ACE) + RtlLengthSid(SeWorldSid) +
|
|
sizeof(ACE) + RtlLengthSid(SeAliasAdminsSid) +
|
|
sizeof(ACE) + RtlLengthSid(SeLocalSystemSid);
|
|
|
|
SdSize = sizeof(SECURITY_DESCRIPTOR) + AclSize;
|
|
|
|
/* Allocate the SD and ACL */
|
|
Sd = ExAllocatePoolWithTag(PagedPool, SdSize, TAG_SD);
|
|
if (Sd == NULL)
|
|
{
|
|
return STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
/* Initialize the SD */
|
|
Status = RtlCreateSecurityDescriptor(Sd,
|
|
SECURITY_DESCRIPTOR_REVISION);
|
|
if (!NT_SUCCESS(Status))
|
|
goto done;
|
|
|
|
Dacl = (PACL)((INT_PTR)Sd + sizeof(SECURITY_DESCRIPTOR));
|
|
|
|
/* Initialize the DACL */
|
|
RtlCreateAcl(Dacl, AclSize, ACL_REVISION);
|
|
|
|
/* Add the ACEs */
|
|
RtlAddAccessAllowedAce(Dacl,
|
|
ACL_REVISION,
|
|
GENERIC_READ,
|
|
SeWorldSid);
|
|
|
|
RtlAddAccessAllowedAce(Dacl,
|
|
ACL_REVISION,
|
|
GENERIC_ALL,
|
|
SeAliasAdminsSid);
|
|
|
|
RtlAddAccessAllowedAce(Dacl,
|
|
ACL_REVISION,
|
|
GENERIC_ALL,
|
|
SeLocalSystemSid);
|
|
|
|
/* Attach the DACL to the SD */
|
|
Status = RtlSetDaclSecurityDescriptor(Sd,
|
|
TRUE,
|
|
Dacl,
|
|
FALSE);
|
|
if (!NT_SUCCESS(Status))
|
|
goto done;
|
|
|
|
*SecurityDescriptor = Sd;
|
|
|
|
done:
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
if (Sd != NULL)
|
|
ExFreePoolWithTag(Sd, TAG_SD);
|
|
}
|
|
|
|
return Status;
|
|
}
|
|
|
|
CODE_SEG("INIT")
|
|
BOOLEAN
|
|
NTAPI
|
|
ObInit2(VOID)
|
|
{
|
|
CCHAR i;
|
|
PKPRCB Prcb;
|
|
PGENERAL_LOOKASIDE CurrentList = NULL;
|
|
|
|
/* Now allocate the per-processor lists */
|
|
for (i = 0; i < KeNumberProcessors; i++)
|
|
{
|
|
/* Get the PRCB for this CPU */
|
|
Prcb = KiProcessorBlock[(int)i];
|
|
|
|
/* Set the OBJECT_CREATE_INFORMATION List */
|
|
Prcb->PPLookasideList[LookasideCreateInfoList].L = &ObpCreateInfoLookasideList;
|
|
CurrentList = ExAllocatePoolWithTag(NonPagedPool,
|
|
sizeof(GENERAL_LOOKASIDE),
|
|
'ICbO');
|
|
if (CurrentList)
|
|
{
|
|
/* Initialize it */
|
|
ExInitializeSystemLookasideList(CurrentList,
|
|
NonPagedPool,
|
|
sizeof(OBJECT_CREATE_INFORMATION),
|
|
'ICbO',
|
|
32,
|
|
&ExSystemLookasideListHead);
|
|
}
|
|
else
|
|
{
|
|
/* No list, use the static buffer */
|
|
CurrentList = &ObpCreateInfoLookasideList;
|
|
}
|
|
|
|
/* Link it */
|
|
Prcb->PPLookasideList[LookasideCreateInfoList].P = CurrentList;
|
|
|
|
/* Set the captured UNICODE_STRING Object Name List */
|
|
Prcb->PPLookasideList[LookasideNameBufferList].L = &ObpNameBufferLookasideList;
|
|
CurrentList = ExAllocatePoolWithTag(NonPagedPool,
|
|
sizeof(GENERAL_LOOKASIDE),
|
|
'MNbO');
|
|
if (CurrentList)
|
|
{
|
|
/* Initialize it */
|
|
ExInitializeSystemLookasideList(CurrentList,
|
|
PagedPool,
|
|
248,
|
|
'MNbO',
|
|
16,
|
|
&ExSystemLookasideListHead);
|
|
}
|
|
else
|
|
{
|
|
/* No list, use the static buffer */
|
|
CurrentList = &ObpNameBufferLookasideList;
|
|
}
|
|
|
|
/* Link it */
|
|
Prcb->PPLookasideList[LookasideNameBufferList].P = CurrentList;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
CODE_SEG("INIT")
|
|
BOOLEAN
|
|
NTAPI
|
|
ObInitSystem(VOID)
|
|
{
|
|
OBJECT_ATTRIBUTES ObjectAttributes;
|
|
UNICODE_STRING Name;
|
|
OBJECT_TYPE_INITIALIZER ObjectTypeInitializer;
|
|
OBP_LOOKUP_CONTEXT Context;
|
|
HANDLE Handle;
|
|
PKPRCB Prcb = KeGetCurrentPrcb();
|
|
PLIST_ENTRY ListHead, NextEntry;
|
|
POBJECT_HEADER Header;
|
|
POBJECT_HEADER_CREATOR_INFO CreatorInfo;
|
|
POBJECT_HEADER_NAME_INFO NameInfo;
|
|
PSECURITY_DESCRIPTOR KernelObjectsSD = NULL;
|
|
NTSTATUS Status;
|
|
|
|
/* Check if this is actually Phase 1 initialization */
|
|
if (ObpInitializationPhase != 0) goto ObPostPhase0;
|
|
|
|
/* Initialize the OBJECT_CREATE_INFORMATION List */
|
|
ExInitializeSystemLookasideList(&ObpCreateInfoLookasideList,
|
|
NonPagedPool,
|
|
sizeof(OBJECT_CREATE_INFORMATION),
|
|
'ICbO',
|
|
32,
|
|
&ExSystemLookasideListHead);
|
|
|
|
/* Set the captured UNICODE_STRING Object Name List */
|
|
ExInitializeSystemLookasideList(&ObpNameBufferLookasideList,
|
|
PagedPool,
|
|
248,
|
|
'MNbO',
|
|
16,
|
|
&ExSystemLookasideListHead);
|
|
|
|
/* Temporarily setup both pointers to the shared list */
|
|
Prcb->PPLookasideList[LookasideCreateInfoList].L = &ObpCreateInfoLookasideList;
|
|
Prcb->PPLookasideList[LookasideCreateInfoList].P = &ObpCreateInfoLookasideList;
|
|
Prcb->PPLookasideList[LookasideNameBufferList].L = &ObpNameBufferLookasideList;
|
|
Prcb->PPLookasideList[LookasideNameBufferList].P = &ObpNameBufferLookasideList;
|
|
|
|
/* Initialize the security descriptor cache */
|
|
ObpInitSdCache();
|
|
|
|
/* Initialize the Default Event */
|
|
KeInitializeEvent(&ObpDefaultObject, NotificationEvent, TRUE);
|
|
|
|
/* Initialize the Dos Device Map mutex */
|
|
KeInitializeGuardedMutex(&ObpDeviceMapLock);
|
|
|
|
/* Setup default access for the system process */
|
|
PsGetCurrentProcess()->GrantedAccess = PROCESS_ALL_ACCESS;
|
|
PsGetCurrentThread()->GrantedAccess = THREAD_ALL_ACCESS;
|
|
|
|
/* Setup the Object Reaper */
|
|
ExInitializeWorkItem(&ObpReaperWorkItem, ObpReapObject, NULL);
|
|
|
|
/* Initialize default Quota block */
|
|
PsInitializeQuotaSystem();
|
|
|
|
/* Create kernel handle table */
|
|
PsGetCurrentProcess()->ObjectTable = ExCreateHandleTable(NULL);
|
|
ObpKernelHandleTable = PsGetCurrentProcess()->ObjectTable;
|
|
|
|
/* Create the Type Type */
|
|
RtlZeroMemory(&ObjectTypeInitializer, sizeof(ObjectTypeInitializer));
|
|
RtlInitUnicodeString(&Name, L"Type");
|
|
ObjectTypeInitializer.Length = sizeof(ObjectTypeInitializer);
|
|
ObjectTypeInitializer.ValidAccessMask = OBJECT_TYPE_ALL_ACCESS;
|
|
ObjectTypeInitializer.UseDefaultObject = TRUE;
|
|
ObjectTypeInitializer.MaintainTypeList = TRUE;
|
|
ObjectTypeInitializer.PoolType = NonPagedPool;
|
|
ObjectTypeInitializer.GenericMapping = ObpTypeMapping;
|
|
ObjectTypeInitializer.DefaultNonPagedPoolCharge = sizeof(OBJECT_TYPE);
|
|
ObjectTypeInitializer.InvalidAttributes = OBJ_OPENLINK;
|
|
ObjectTypeInitializer.DeleteProcedure = ObpDeleteObjectType;
|
|
ObCreateObjectType(&Name, &ObjectTypeInitializer, NULL, &ObpTypeObjectType);
|
|
|
|
/* Create the Directory Type */
|
|
RtlInitUnicodeString(&Name, L"Directory");
|
|
ObjectTypeInitializer.PoolType = PagedPool;
|
|
ObjectTypeInitializer.ValidAccessMask = DIRECTORY_ALL_ACCESS;
|
|
ObjectTypeInitializer.CaseInsensitive = TRUE;
|
|
ObjectTypeInitializer.MaintainTypeList = FALSE;
|
|
ObjectTypeInitializer.GenericMapping = ObpDirectoryMapping;
|
|
ObjectTypeInitializer.DeleteProcedure = NULL;
|
|
ObjectTypeInitializer.DefaultNonPagedPoolCharge = sizeof(OBJECT_DIRECTORY);
|
|
ObCreateObjectType(&Name, &ObjectTypeInitializer, NULL, &ObpDirectoryObjectType);
|
|
ObpDirectoryObjectType->TypeInfo.ValidAccessMask &= ~SYNCHRONIZE;
|
|
|
|
/* Create 'symbolic link' object type */
|
|
RtlInitUnicodeString(&Name, L"SymbolicLink");
|
|
ObjectTypeInitializer.DefaultNonPagedPoolCharge = sizeof(OBJECT_SYMBOLIC_LINK);
|
|
ObjectTypeInitializer.GenericMapping = ObpSymbolicLinkMapping;
|
|
ObjectTypeInitializer.ValidAccessMask = SYMBOLIC_LINK_ALL_ACCESS;
|
|
ObjectTypeInitializer.ParseProcedure = ObpParseSymbolicLink;
|
|
ObjectTypeInitializer.DeleteProcedure = ObpDeleteSymbolicLink;
|
|
ObCreateObjectType(&Name, &ObjectTypeInitializer, NULL, &ObpSymbolicLinkObjectType);
|
|
ObpSymbolicLinkObjectType->TypeInfo.ValidAccessMask &= ~SYNCHRONIZE;
|
|
|
|
/* Phase 0 initialization complete */
|
|
ObpInitializationPhase++;
|
|
return TRUE;
|
|
|
|
ObPostPhase0:
|
|
|
|
/* Re-initialize lookaside lists */
|
|
ObInit2();
|
|
|
|
/* Initialize Object Types directory attributes */
|
|
RtlInitUnicodeString(&Name, L"\\");
|
|
InitializeObjectAttributes(&ObjectAttributes,
|
|
&Name,
|
|
OBJ_CASE_INSENSITIVE | OBJ_PERMANENT,
|
|
NULL,
|
|
SePublicDefaultUnrestrictedSd);
|
|
|
|
/* Create the directory */
|
|
Status = NtCreateDirectoryObject(&Handle,
|
|
DIRECTORY_ALL_ACCESS,
|
|
&ObjectAttributes);
|
|
if (!NT_SUCCESS(Status)) return FALSE;
|
|
|
|
/* Get a handle to it */
|
|
Status = ObReferenceObjectByHandle(Handle,
|
|
0,
|
|
ObpDirectoryObjectType,
|
|
KernelMode,
|
|
(PVOID*)&ObpRootDirectoryObject,
|
|
NULL);
|
|
if (!NT_SUCCESS(Status)) return FALSE;
|
|
|
|
/* Close the extra handle */
|
|
Status = NtClose(Handle);
|
|
if (!NT_SUCCESS(Status)) return FALSE;
|
|
|
|
/* Create a custom security descriptor for the KernelObjects directory */
|
|
Status = ObpCreateKernelObjectsSD(&KernelObjectsSD);
|
|
if (!NT_SUCCESS(Status))
|
|
return FALSE;
|
|
|
|
/* Initialize the KernelObjects directory attributes */
|
|
RtlInitUnicodeString(&Name, L"\\KernelObjects");
|
|
InitializeObjectAttributes(&ObjectAttributes,
|
|
&Name,
|
|
OBJ_CASE_INSENSITIVE | OBJ_PERMANENT,
|
|
NULL,
|
|
KernelObjectsSD);
|
|
|
|
/* Create the directory */
|
|
Status = NtCreateDirectoryObject(&Handle,
|
|
DIRECTORY_ALL_ACCESS,
|
|
&ObjectAttributes);
|
|
ExFreePoolWithTag(KernelObjectsSD, TAG_SD);
|
|
if (!NT_SUCCESS(Status)) return FALSE;
|
|
|
|
/* Close the extra handle */
|
|
Status = NtClose(Handle);
|
|
if (!NT_SUCCESS(Status)) return FALSE;
|
|
|
|
/* Initialize ObjectTypes directory attributes */
|
|
RtlInitUnicodeString(&Name, L"\\ObjectTypes");
|
|
InitializeObjectAttributes(&ObjectAttributes,
|
|
&Name,
|
|
OBJ_CASE_INSENSITIVE | OBJ_PERMANENT,
|
|
NULL,
|
|
NULL);
|
|
|
|
/* Create the directory */
|
|
Status = NtCreateDirectoryObject(&Handle,
|
|
DIRECTORY_ALL_ACCESS,
|
|
&ObjectAttributes);
|
|
if (!NT_SUCCESS(Status)) return FALSE;
|
|
|
|
/* Get a handle to it */
|
|
Status = ObReferenceObjectByHandle(Handle,
|
|
0,
|
|
ObpDirectoryObjectType,
|
|
KernelMode,
|
|
(PVOID*)&ObpTypeDirectoryObject,
|
|
NULL);
|
|
if (!NT_SUCCESS(Status)) return FALSE;
|
|
|
|
/* Close the extra handle */
|
|
Status = NtClose(Handle);
|
|
if (!NT_SUCCESS(Status)) return FALSE;
|
|
|
|
/* Initialize the lookup context and lock it */
|
|
ObpInitializeLookupContext(&Context);
|
|
ObpAcquireLookupContextLock(&Context, ObpTypeDirectoryObject);
|
|
|
|
/* Loop the object types */
|
|
ListHead = &ObpTypeObjectType->TypeList;
|
|
NextEntry = ListHead->Flink;
|
|
while (ListHead != NextEntry)
|
|
{
|
|
/* Get the creator info from the list */
|
|
CreatorInfo = CONTAINING_RECORD(NextEntry,
|
|
OBJECT_HEADER_CREATOR_INFO,
|
|
TypeList);
|
|
|
|
/* Recover the header and the name header from the creator info */
|
|
Header = (POBJECT_HEADER)(CreatorInfo + 1);
|
|
NameInfo = OBJECT_HEADER_TO_NAME_INFO(Header);
|
|
|
|
/* Make sure we have a name, and aren't inserted yet */
|
|
if ((NameInfo) && !(NameInfo->Directory))
|
|
{
|
|
/* Do the initial lookup to setup the context */
|
|
if (!ObpLookupEntryDirectory(ObpTypeDirectoryObject,
|
|
&NameInfo->Name,
|
|
OBJ_CASE_INSENSITIVE,
|
|
FALSE,
|
|
&Context))
|
|
{
|
|
/* Insert this object type */
|
|
ObpInsertEntryDirectory(ObpTypeDirectoryObject,
|
|
&Context,
|
|
Header);
|
|
}
|
|
}
|
|
|
|
/* Move to the next entry */
|
|
NextEntry = NextEntry->Flink;
|
|
}
|
|
|
|
/* Cleanup after lookup */
|
|
ObpReleaseLookupContext(&Context);
|
|
|
|
/* Initialize DOS Devices Directory and related Symbolic Links */
|
|
Status = ObpCreateDosDevicesDirectory();
|
|
if (!NT_SUCCESS(Status)) return FALSE;
|
|
return TRUE;
|
|
}
|
|
|
|
/* EOF */
|