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ob_x.h File Reference
#include "ex.h"
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Macros

#define OBP_LOCK_STATE_PRE_ACQUISITION_EXCLUSIVE   0xAAAA1234
 
#define OBP_LOCK_STATE_PRE_ACQUISITION_SHARED   0xBBBB1234
 
#define OBP_LOCK_STATE_POST_ACQUISITION_EXCLUSIVE   0xCCCC1234
 
#define OBP_LOCK_STATE_POST_ACQUISITION_SHARED   0xDDDD1234
 
#define OBP_LOCK_STATE_RELEASED   0xEEEE1234
 
#define OBP_LOCK_STATE_INITIALIZED   0xFFFF1234
 
#define OBP_NAME_LOOKASIDE_MAX_SIZE   248
 

Functions

FORCEINLINE ULONG ObpValidateAttributes (IN ULONG Attributes, IN KPROCESSOR_MODE PreviousMode)
 
FORCEINLINE ULONG ObpSelectObjectLockSlot (IN POBJECT_HEADER ObjectHeader)
 
FORCEINLINE VOID ObpAcquireObjectLock (IN POBJECT_HEADER ObjectHeader)
 
FORCEINLINE VOID ObpAcquireObjectLockShared (IN POBJECT_HEADER ObjectHeader)
 
FORCEINLINE VOID ObpReleaseObjectLock (IN POBJECT_HEADER ObjectHeader)
 
FORCEINLINE POBJECT_HEADER_NAME_INFO ObpReferenceNameInfo (IN POBJECT_HEADER ObjectHeader)
 
FORCEINLINE VOID ObpDereferenceNameInfo (IN POBJECT_HEADER_NAME_INFO HeaderNameInfo)
 
FORCEINLINE VOID ObpAcquireDirectoryLockShared (IN POBJECT_DIRECTORY Directory, IN POBP_LOOKUP_CONTEXT Context)
 Locks a directory for shared access. Used for reading members of the directory object. More...
 
FORCEINLINE VOID ObpAcquireDirectoryLockExclusive (IN POBJECT_DIRECTORY Directory, IN POBP_LOOKUP_CONTEXT Context)
 Locks a directory for exclusive access. Used for writing/reading members of the directory object. More...
 
FORCEINLINE VOID ObpReleaseDirectoryLock (IN POBJECT_DIRECTORY Directory, IN POBP_LOOKUP_CONTEXT Context)
 Unlocks a previously shared or exclusively locked directory. More...
 
FORCEINLINE VOID ObpInitializeLookupContext (IN POBP_LOOKUP_CONTEXT Context)
 Initializes a new object directory lookup context. Used for lookup operations (insertions/deletions) in a directory. Employed in conjunction with the directory locking functions. More...
 
FORCEINLINE VOID ObpAcquireLookupContextLock (IN POBP_LOOKUP_CONTEXT Context, IN POBJECT_DIRECTORY Directory)
 Locks an object directory lookup context for performing lookup operations (insertions/deletions) in a directory. The directory is locked for exclusive access. More...
 
FORCEINLINE VOID ObpReleaseLookupContextObject (IN POBP_LOOKUP_CONTEXT Context)
 
FORCEINLINE VOID ObpReleaseLookupContext (IN POBP_LOOKUP_CONTEXT Context)
 Releases an initialized object directory lookup context. Unlocks it if necessary, and dereferences the underlying object. More...
 
FORCEINLINE VOID ObpEnterObjectTypeMutex (IN POBJECT_TYPE ObjectType)
 
FORCEINLINE VOID ObpLeaveObjectTypeMutex (IN POBJECT_TYPE ObjectType)
 
FORCEINLINE VOID ObpReleaseObjectCreateInformation (IN POBJECT_CREATE_INFORMATION ObjectCreateInfo)
 
FORCEINLINE PVOID ObpAllocateObjectCreateInfoBuffer (IN PP_NPAGED_LOOKASIDE_NUMBER Type)
 
FORCEINLINE VOID ObpFreeCapturedAttributes (IN PVOID Buffer, IN PP_NPAGED_LOOKASIDE_NUMBER Type)
 
FORCEINLINE VOID ObpFreeObjectCreateInformation (IN POBJECT_CREATE_INFORMATION ObjectCreateInfo)
 
FORCEINLINE VOID ObpCalloutStart (IN PKIRQL CalloutIrql)
 
FORCEINLINE VOID ObpCalloutEnd (IN KIRQL CalloutIrql, IN PCHAR Procedure, IN POBJECT_TYPE ObjectType, IN PVOID Object)
 

Macro Definition Documentation

◆ OBP_LOCK_STATE_INITIALIZED

#define OBP_LOCK_STATE_INITIALIZED   0xFFFF1234

Definition at line 16 of file ob_x.h.

◆ OBP_LOCK_STATE_POST_ACQUISITION_EXCLUSIVE

#define OBP_LOCK_STATE_POST_ACQUISITION_EXCLUSIVE   0xCCCC1234

Definition at line 13 of file ob_x.h.

◆ OBP_LOCK_STATE_POST_ACQUISITION_SHARED

#define OBP_LOCK_STATE_POST_ACQUISITION_SHARED   0xDDDD1234

Definition at line 14 of file ob_x.h.

◆ OBP_LOCK_STATE_PRE_ACQUISITION_EXCLUSIVE

#define OBP_LOCK_STATE_PRE_ACQUISITION_EXCLUSIVE   0xAAAA1234

Definition at line 11 of file ob_x.h.

◆ OBP_LOCK_STATE_PRE_ACQUISITION_SHARED

#define OBP_LOCK_STATE_PRE_ACQUISITION_SHARED   0xBBBB1234

Definition at line 12 of file ob_x.h.

◆ OBP_LOCK_STATE_RELEASED

#define OBP_LOCK_STATE_RELEASED   0xEEEE1234

Definition at line 15 of file ob_x.h.

◆ OBP_NAME_LOOKASIDE_MAX_SIZE

#define OBP_NAME_LOOKASIDE_MAX_SIZE   248

Definition at line 18 of file ob_x.h.

Function Documentation

◆ ObpAcquireDirectoryLockExclusive()

FORCEINLINE VOID ObpAcquireDirectoryLockExclusive ( IN POBJECT_DIRECTORY  Directory,
IN POBP_LOOKUP_CONTEXT  Context 
)

Locks a directory for exclusive access. Used for writing/reading members of the directory object.

Parameters
[in]DirectoryThe directory to lock.
[in]ContextThe lookup lock context.

Definition at line 212 of file ob_x.h.

214 {
215  /* Update lock flag */
217 
218  /* Acquire an exclusive directory lock */
221 
222  /* Update lock flag */
224 }
FORCEINLINE VOID ExAcquirePushLockExclusive(PEX_PUSH_LOCK PushLock)
Definition: ex.h:1034
#define KeEnterCriticalRegion()
Definition: ke_x.h:88
#define OBP_LOCK_STATE_POST_ACQUISITION_EXCLUSIVE
Definition: ob_x.h:13
base for all directory entries
Definition: entries.h:138
#define OBP_LOCK_STATE_PRE_ACQUISITION_EXCLUSIVE
Definition: ob_x.h:11

Referenced by NtSetInformationObject(), and ObpAcquireLookupContextLock().

◆ ObpAcquireDirectoryLockShared()

FORCEINLINE VOID ObpAcquireDirectoryLockShared ( IN POBJECT_DIRECTORY  Directory,
IN POBP_LOOKUP_CONTEXT  Context 
)

Locks a directory for shared access. Used for reading members of the directory object.

Parameters
[in]DirectoryThe directory to lock.
[in]ContextThe lookup lock context.

Definition at line 185 of file ob_x.h.

187 {
188  /* Update lock flag */
189  Context->LockStateSignature = OBP_LOCK_STATE_PRE_ACQUISITION_SHARED;
190 
191  /* Acquire an shared directory lock */
194 
195  /* Update lock flag */
196  Context->LockStateSignature = OBP_LOCK_STATE_POST_ACQUISITION_SHARED;
197 }
#define OBP_LOCK_STATE_POST_ACQUISITION_SHARED
Definition: ob_x.h:14
#define KeEnterCriticalRegion()
Definition: ke_x.h:88
FORCEINLINE VOID ExAcquirePushLockShared(PEX_PUSH_LOCK PushLock)
Definition: ex.h:1103
#define OBP_LOCK_STATE_PRE_ACQUISITION_SHARED
Definition: ob_x.h:12
base for all directory entries
Definition: entries.h:138

Referenced by NtQueryDirectoryObject(), and ObpLookupEntryDirectory().

◆ ObpAcquireLookupContextLock()

FORCEINLINE VOID ObpAcquireLookupContextLock ( IN POBP_LOOKUP_CONTEXT  Context,
IN POBJECT_DIRECTORY  Directory 
)

Locks an object directory lookup context for performing lookup operations (insertions/deletions) in a directory. The directory is locked for exclusive access.

Parameters
[in]ContextThe lookup context to lock.
[in]DirectoryThe directory on which the lookup context applies.

Definition at line 281 of file ob_x.h.

283 {
284  /* Acquire an exclusive directory lock and save its lock state */
286  Context->Directory = Directory;
287  Context->DirectoryLocked = TRUE;
288 }
#define TRUE
Definition: types.h:120
FORCEINLINE VOID ObpAcquireDirectoryLockExclusive(IN POBJECT_DIRECTORY Directory, IN POBP_LOOKUP_CONTEXT Context)
Locks a directory for exclusive access. Used for writing/reading members of the directory object.
Definition: ob_x.h:212
base for all directory entries
Definition: entries.h:138
_In_ BOOLEAN _In_ USHORT Directory
Definition: rtlfuncs.h:3885

Referenced by ObCreateObjectType(), ObInitSystem(), ObpDeleteNameCheck(), and ObpLookupObjectName().

◆ ObpAcquireObjectLock()

FORCEINLINE VOID ObpAcquireObjectLock ( IN POBJECT_HEADER  ObjectHeader)

Definition at line 48 of file ob_x.h.

49 {
50  ULONG Slot;
51  POBJECT_TYPE ObjectType = ObjectHeader->Type;
52 
53  /* Sanity check */
55 
56  /* Pick a slot */
57  Slot = ObpSelectObjectLockSlot(ObjectHeader);
58 
59  /* Enter a critical region and acquire the resource */
61  ExAcquireResourceExclusiveLite(&ObjectType->ObjectLocks[Slot], TRUE);
62 }
#define KeGetCurrentIrql()
Definition: env_spec_w32.h:706
ObjectType
Definition: metafile.c:80
#define TRUE
Definition: types.h:120
BOOLEAN NTAPI ExAcquireResourceExclusiveLite(IN PERESOURCE Resource, IN BOOLEAN Wait)
Definition: resource.c:770
FORCEINLINE ULONG ObpSelectObjectLockSlot(IN POBJECT_HEADER ObjectHeader)
Definition: ob_x.h:40
#define ASSERT(a)
Definition: mode.c:44
#define KeEnterCriticalRegion()
Definition: ke_x.h:88
unsigned int ULONG
Definition: retypes.h:1
#define APC_LEVEL
Definition: env_spec_w32.h:695

Referenced by NtQuerySymbolicLinkObject(), ObInsertObject(), ObpDecrementHandleCount(), ObpDeleteNameCheck(), ObpIncrementHandleCount(), ObpIncrementUnnamedHandleCount(), ObpSetPermanentObject(), and ObSetSecurityDescriptorInfo().

◆ ObpAcquireObjectLockShared()

FORCEINLINE VOID ObpAcquireObjectLockShared ( IN POBJECT_HEADER  ObjectHeader)

Definition at line 66 of file ob_x.h.

67 {
68  ULONG Slot;
69  POBJECT_TYPE ObjectType = ObjectHeader->Type;
70 
71  /* Sanity check */
73 
74  /* Pick a slot */
75  Slot = ObpSelectObjectLockSlot(ObjectHeader);
76 
77  /* Enter a critical region and acquire the resource */
79  ExAcquireResourceSharedLite(&ObjectType->ObjectLocks[Slot], TRUE);
80 }
#define KeGetCurrentIrql()
Definition: env_spec_w32.h:706
ObjectType
Definition: metafile.c:80
#define TRUE
Definition: types.h:120
FORCEINLINE ULONG ObpSelectObjectLockSlot(IN POBJECT_HEADER ObjectHeader)
Definition: ob_x.h:40
#define ASSERT(a)
Definition: mode.c:44
#define KeEnterCriticalRegion()
Definition: ke_x.h:88
BOOLEAN NTAPI ExAcquireResourceSharedLite(IN PERESOURCE Resource, IN BOOLEAN Wait)
Definition: resource.c:885
unsigned int ULONG
Definition: retypes.h:1
#define APC_LEVEL
Definition: env_spec_w32.h:695

Referenced by ObpReferenceSecurityDescriptor().

◆ ObpAllocateObjectCreateInfoBuffer()

FORCEINLINE PVOID ObpAllocateObjectCreateInfoBuffer ( IN PP_NPAGED_LOOKASIDE_NUMBER  Type)

Definition at line 379 of file ob_x.h.

380 {
381  PVOID Buffer;
383  PKPRCB Prcb = KeGetCurrentPrcb();
384 
385  /* Get the P list first */
387 
388  /* Attempt allocation */
389  List->L.TotalAllocates++;
390  Buffer = (PVOID)InterlockedPopEntrySList(&List->L.ListHead);
391  if (!Buffer)
392  {
393  /* Let the balancer know that the P list failed */
394  List->L.AllocateMisses++;
395 
396  /* Try the L List */
398  List->L.TotalAllocates++;
399  Buffer = (PVOID)InterlockedPopEntrySList(&List->L.ListHead);
400  if (!Buffer)
401  {
402  /* Let the balancer know the L list failed too */
403  List->L.AllocateMisses++;
404 
405  /* Allocate it */
406  Buffer = List->L.Allocate(List->L.Type, List->L.Size, List->L.Tag);
407  }
408  }
409 
410  /* Return buffer */
411  return Buffer;
412 }
IN BOOLEAN OUT PSTR Buffer
Definition: progress.h:34
FORCEINLINE struct _KPRCB * KeGetCurrentPrcb(VOID)
Definition: ketypes.h:1080
struct LOOKASIDE_ALIGN _NPAGED_LOOKASIDE_LIST * PNPAGED_LOOKASIDE_LIST
PP_LOOKASIDE_LIST PPLookasideList[16]
Definition: ketypes.h:629
Definition: bufpool.h:45
Type
Definition: Type.h:6
struct _GENERAL_LOOKASIDE * L
Definition: ketypes.h:812
_Must_inspect_result_ _In_ WDFCMRESLIST List
Definition: wdfresource.h:550
struct _GENERAL_LOOKASIDE * P
Definition: ketypes.h:811
#define InterlockedPopEntrySList(SListHead)
Definition: rtlfuncs.h:3392

Referenced by ObCreateObject(), and ObpAllocateObjectNameBuffer().

◆ ObpCalloutEnd()

FORCEINLINE VOID ObpCalloutEnd ( IN KIRQL  CalloutIrql,
IN PCHAR  Procedure,
IN POBJECT_TYPE  ObjectType,
IN PVOID  Object 
)

◆ ObpCalloutStart()

FORCEINLINE VOID ObpCalloutStart ( IN PKIRQL  CalloutIrql)

◆ ObpDereferenceNameInfo()

FORCEINLINE VOID ObpDereferenceNameInfo ( IN POBJECT_HEADER_NAME_INFO  HeaderNameInfo)

Definition at line 143 of file ob_x.h.

144 {
146 
147  /* Bail out if there's no info at all */
148  if (!HeaderNameInfo) return;
149 
150  /* Remove a query reference and check if it was the last one */
151  if (!InterlockedDecrement((PLONG)&HeaderNameInfo->QueryReferences))
152  {
153  /* Check if we have a name */
154  if (HeaderNameInfo->Name.Buffer)
155  {
156  /* We can get rid of the object name now */
157  ExFreePoolWithTag(HeaderNameInfo->Name.Buffer, OB_NAME_TAG);
158  RtlInitEmptyUnicodeString(&HeaderNameInfo->Name, NULL, 0);
159  }
160 
161  /* Check if the object has a directory associated to it */
162  Directory = HeaderNameInfo->Directory;
163  if (Directory)
164  {
165  /* Delete the directory */
166  HeaderNameInfo->Directory = NULL;
168  }
169  }
170 }
VOID NTAPI ObDereferenceObjectDeferDelete(IN PVOID Object)
Definition: obref.c:358
Directory()
Definition: entries.h:140
#define OB_NAME_TAG
Definition: tag.h:115
#define InterlockedDecrement
Definition: armddk.h:52
#define NULL
Definition: types.h:112
base for all directory entries
Definition: entries.h:138
_In_ BOOLEAN _In_ USHORT Directory
Definition: rtlfuncs.h:3885
#define ExFreePoolWithTag(_P, _T)
Definition: module.h:1099
signed int * PLONG
Definition: retypes.h:5

Referenced by ObInsertObject(), ObpCreateSymbolicLinkName(), ObpDeleteNameCheck(), ObpProcessDosDeviceSymbolicLink(), ObpReleaseLookupContextObject(), ObSetDeviceMap(), and ObSetDirectoryDeviceMap().

◆ ObpEnterObjectTypeMutex()

FORCEINLINE VOID ObpEnterObjectTypeMutex ( IN POBJECT_TYPE  ObjectType)

Definition at line 340 of file ob_x.h.

341 {
342  /* Sanity check */
344 
345  /* Enter a critical region and acquire the resource */
348 }
#define KeGetCurrentIrql()
Definition: env_spec_w32.h:706
ObjectType
Definition: metafile.c:80
#define TRUE
Definition: types.h:120
BOOLEAN NTAPI ExAcquireResourceExclusiveLite(IN PERESOURCE Resource, IN BOOLEAN Wait)
Definition: resource.c:770
#define ASSERT(a)
Definition: mode.c:44
#define KeEnterCriticalRegion()
Definition: ke_x.h:88
#define APC_LEVEL
Definition: env_spec_w32.h:695

Referenced by ObCreateObjectType(), ObpDeleteObject(), ObpIncrementHandleCount(), ObpIncrementUnnamedHandleCount(), ObSetDeviceMap(), and ObSetDirectoryDeviceMap().

◆ ObpFreeCapturedAttributes()

FORCEINLINE VOID ObpFreeCapturedAttributes ( IN PVOID  Buffer,
IN PP_NPAGED_LOOKASIDE_NUMBER  Type 
)

Definition at line 416 of file ob_x.h.

418 {
420  PKPRCB Prcb = KeGetCurrentPrcb();
421 
422  /* Use the P List */
424  List->L.TotalFrees++;
425 
426  /* Check if the Free was within the Depth or not */
427  if (ExQueryDepthSList(&List->L.ListHead) >= List->L.Depth)
428  {
429  /* Let the balancer know */
430  List->L.FreeMisses++;
431 
432  /* Use the L List */
434  List->L.TotalFrees++;
435 
436  /* Check if the Free was within the Depth or not */
437  if (ExQueryDepthSList(&List->L.ListHead) >= List->L.Depth)
438  {
439  /* All lists failed, use the pool */
440  List->L.FreeMisses++;
441  List->L.Free(Buffer);
442  }
443  else
444  {
445  /* The free was within the Depth */
446  InterlockedPushEntrySList(&List->L.ListHead,
448  }
449  }
450  else
451  {
452  /* The free was within the Depth */
453  InterlockedPushEntrySList(&List->L.ListHead,
455  }
456 }
FORCEINLINE struct _KPRCB * KeGetCurrentPrcb(VOID)
Definition: ketypes.h:1080
if(dx==0 &&dy==0)
Definition: linetemp.h:174
struct LOOKASIDE_ALIGN _NPAGED_LOOKASIDE_LIST * PNPAGED_LOOKASIDE_LIST
PP_LOOKASIDE_LIST PPLookasideList[16]
Definition: ketypes.h:629
Definition: bufpool.h:45
Type
Definition: Type.h:6
#define PSLIST_ENTRY
Definition: rtltypes.h:134
FORCEINLINE USHORT ExQueryDepthSList(_In_ PSLIST_HEADER SListHead)
Definition: exfuncs.h:153
struct _GENERAL_LOOKASIDE * L
Definition: ketypes.h:812
_Must_inspect_result_ _In_ WDFCMRESLIST List
Definition: wdfresource.h:550
#define InterlockedPushEntrySList(SListHead, SListEntry)
Definition: rtlfuncs.h:3389
struct _GENERAL_LOOKASIDE * P
Definition: ketypes.h:811

Referenced by ObCreateObject(), ObFreeObjectCreateInfoBuffer(), ObpFreeObjectCreateInformation(), and ObpFreeObjectNameBuffer().

◆ ObpFreeObjectCreateInformation()

FORCEINLINE VOID ObpFreeObjectCreateInformation ( IN POBJECT_CREATE_INFORMATION  ObjectCreateInfo)

Definition at line 460 of file ob_x.h.

461 {
462  /* First release the attributes, then free them from the lookaside list */
463  ObpReleaseObjectCreateInformation(ObjectCreateInfo);
465 }
FORCEINLINE VOID ObpFreeCapturedAttributes(IN PVOID Buffer, IN PP_NPAGED_LOOKASIDE_NUMBER Type)
Definition: ob_x.h:416
FORCEINLINE VOID ObpReleaseObjectCreateInformation(IN POBJECT_CREATE_INFORMATION ObjectCreateInfo)
Definition: ob_x.h:364

Referenced by ObCreateObject(), ObDeleteCapturedInsertInfo(), ObInsertObject(), ObOpenObjectByName(), and ObpDeallocateObject().

◆ ObpInitializeLookupContext()

FORCEINLINE VOID ObpInitializeLookupContext ( IN POBP_LOOKUP_CONTEXT  Context)

Initializes a new object directory lookup context. Used for lookup operations (insertions/deletions) in a directory. Employed in conjunction with the directory locking functions.

Parameters
[in]ContextThe new lookup context to initialize.

Definition at line 258 of file ob_x.h.

259 {
260  /* Initialize a null context */
261  Context->Object = NULL;
262  Context->Directory = NULL;
263  Context->DirectoryLocked = FALSE;
264  Context->LockStateSignature = OBP_LOCK_STATE_INITIALIZED;
265 }
#define FALSE
Definition: types.h:117
#define OBP_LOCK_STATE_INITIALIZED
Definition: ob_x.h:16
#define NULL
Definition: types.h:112

Referenced by NtQueryDirectoryObject(), NtSetInformationObject(), ObCreateObjectType(), ObInitSystem(), ObInsertObject(), ObpDeleteNameCheck(), ObpLookupObjectName(), and ObpProcessDosDeviceSymbolicLink().

◆ ObpLeaveObjectTypeMutex()

FORCEINLINE VOID ObpLeaveObjectTypeMutex ( IN POBJECT_TYPE  ObjectType)

Definition at line 352 of file ob_x.h.

353 {
354  /* Enter a critical region and acquire the resource */
357 
358  /* Sanity check */
360 }
#define KeGetCurrentIrql()
Definition: env_spec_w32.h:706
ObjectType
Definition: metafile.c:80
#define ASSERT(a)
Definition: mode.c:44
VOID FASTCALL ExReleaseResourceLite(IN PERESOURCE Resource)
Definition: resource.c:1817
#define KeLeaveCriticalRegion()
Definition: ke_x.h:119
#define APC_LEVEL
Definition: env_spec_w32.h:695

Referenced by ObCreateObjectType(), ObpDeleteObject(), ObpIncrementHandleCount(), ObpIncrementUnnamedHandleCount(), ObSetDeviceMap(), and ObSetDirectoryDeviceMap().

◆ ObpReferenceNameInfo()

FORCEINLINE POBJECT_HEADER_NAME_INFO ObpReferenceNameInfo ( IN POBJECT_HEADER  ObjectHeader)

Definition at line 102 of file ob_x.h.

103 {
104  POBJECT_HEADER_NAME_INFO ObjectNameInfo;
105  ULONG NewValue, References;
106 
107  /* Make sure we have name information at all */
108  ObjectNameInfo = OBJECT_HEADER_TO_NAME_INFO(ObjectHeader);
109  if (!ObjectNameInfo) return NULL;
110 
111  /* Get the number of references */
112  References = ObjectNameInfo->QueryReferences;
113  for (;;)
114  {
115  /* Check if the count is 0 and fail if so */
116  if (!References) return NULL;
117 
118  /* Increment the number of references */
119  NewValue = InterlockedCompareExchange((PLONG)&ObjectNameInfo->
120  QueryReferences,
121  References + 1,
122  References);
123  if (NewValue == References) break;
124 
125  /* We failed, try again */
126  References = NewValue;
127  }
128 
129  /* Check for magic flag */
130  if (ObjectNameInfo->QueryReferences & 0x80000000)
131  {
132  /* FIXME: Unhandled*/
133  DbgPrint("OB: Unhandled path\n");
134  ASSERT(FALSE);
135  }
136 
137  /* Return the name information */
138  return ObjectNameInfo;
139 }
#define DbgPrint
Definition: hal.h:12
#define InterlockedCompareExchange
Definition: interlocked.h:104
#define OBJECT_HEADER_TO_NAME_INFO(h)
Definition: obtypes.h:114
#define FALSE
Definition: types.h:117
#define ASSERT(a)
Definition: mode.c:44
#define NULL
Definition: types.h:112
unsigned int ULONG
Definition: retypes.h:1
signed int * PLONG
Definition: retypes.h:5

Referenced by ObInsertObject(), ObpCreateSymbolicLinkName(), ObpDeleteNameCheck(), ObpLookupEntryDirectory(), ObpProcessDosDeviceSymbolicLink(), ObSetDeviceMap(), and ObSetDirectoryDeviceMap().

◆ ObpReleaseDirectoryLock()

FORCEINLINE VOID ObpReleaseDirectoryLock ( IN POBJECT_DIRECTORY  Directory,
IN POBP_LOOKUP_CONTEXT  Context 
)

Unlocks a previously shared or exclusively locked directory.

Parameters
[in]DirectoryThe directory to unlock.
[in]ContextThe lookup lock context.

Definition at line 238 of file ob_x.h.

240 {
241  /* Release the lock */
243  Context->LockStateSignature = OBP_LOCK_STATE_RELEASED;
245 }
#define OBP_LOCK_STATE_RELEASED
Definition: ob_x.h:15
FORCEINLINE VOID ExReleasePushLock(PEX_PUSH_LOCK PushLock)
Definition: ex.h:1294
#define KeLeaveCriticalRegion()
Definition: ke_x.h:119
base for all directory entries
Definition: entries.h:138

Referenced by NtQueryDirectoryObject(), NtSetInformationObject(), ObpLookupEntryDirectory(), and ObpReleaseLookupContext().

◆ ObpReleaseLookupContext()

FORCEINLINE VOID ObpReleaseLookupContext ( IN POBP_LOOKUP_CONTEXT  Context)

Releases an initialized object directory lookup context. Unlocks it if necessary, and dereferences the underlying object.

Parameters
[in]ContextThe lookup context to release.

Definition at line 323 of file ob_x.h.

324 {
325  /* Check if we came back with the directory locked */
326  if (Context->DirectoryLocked)
327  {
328  /* Release the directory lock */
330  Context->Directory = NULL;
331  Context->DirectoryLocked = FALSE;
332  }
333 
334  /* Clear the context */
336 }
FORCEINLINE VOID ObpReleaseDirectoryLock(IN POBJECT_DIRECTORY Directory, IN POBP_LOOKUP_CONTEXT Context)
Unlocks a previously shared or exclusively locked directory.
Definition: ob_x.h:238
#define FALSE
Definition: types.h:117
FORCEINLINE VOID ObpReleaseLookupContextObject(IN POBP_LOOKUP_CONTEXT Context)
Definition: ob_x.h:292
#define NULL
Definition: types.h:112

Referenced by NtSetInformationObject(), ObCreateObjectType(), ObInitSystem(), ObInsertObject(), ObOpenObjectByName(), ObpCreateHandle(), ObpDeleteNameCheck(), ObpLookupObjectName(), ObpProcessDosDeviceSymbolicLink(), and ObReferenceObjectByName().

◆ ObpReleaseLookupContextObject()

FORCEINLINE VOID ObpReleaseLookupContextObject ( IN POBP_LOOKUP_CONTEXT  Context)

Definition at line 292 of file ob_x.h.

293 {
294  POBJECT_HEADER ObjectHeader;
295  POBJECT_HEADER_NAME_INFO HeaderNameInfo;
296 
297  /* Check if we had an object */
298  if (Context->Object)
299  {
300  /* Get the object name information */
301  ObjectHeader = OBJECT_TO_OBJECT_HEADER(Context->Object);
302  HeaderNameInfo = OBJECT_HEADER_TO_NAME_INFO(ObjectHeader);
303 
304  /* Release the name information */
305  ObpDereferenceNameInfo(HeaderNameInfo);
306 
307  /* Dereference the object */
308  ObDereferenceObject(Context->Object);
309  Context->Object = NULL;
310  }
311 }
#define OBJECT_HEADER_TO_NAME_INFO(h)
Definition: obtypes.h:114
#define OBJECT_TO_OBJECT_HEADER(o)
Definition: obtypes.h:111
#define ObDereferenceObject
Definition: obfuncs.h:203
#define NULL
Definition: types.h:112
FORCEINLINE VOID ObpDereferenceNameInfo(IN POBJECT_HEADER_NAME_INFO HeaderNameInfo)
Definition: ob_x.h:143

Referenced by ObpLookupEntryDirectory(), and ObpReleaseLookupContext().

◆ ObpReleaseObjectCreateInformation()

FORCEINLINE VOID ObpReleaseObjectCreateInformation ( IN POBJECT_CREATE_INFORMATION  ObjectCreateInfo)

Definition at line 364 of file ob_x.h.

365 {
366  /* Check if we have a security descriptor */
367  if (ObjectCreateInfo->SecurityDescriptor)
368  {
369  /* Release it */
370  SeReleaseSecurityDescriptor(ObjectCreateInfo->SecurityDescriptor,
371  ObjectCreateInfo->ProbeMode,
372  TRUE);
373  ObjectCreateInfo->SecurityDescriptor = NULL;
374  }
375 }
#define TRUE
Definition: types.h:120
NTSTATUS NTAPI SeReleaseSecurityDescriptor(_In_ PSECURITY_DESCRIPTOR CapturedSecurityDescriptor, _In_ KPROCESSOR_MODE CurrentMode, _In_ BOOLEAN CaptureIfKernelMode)
Releases a captured security descriptor buffer.
Definition: sd.c:760
#define NULL
Definition: types.h:112

Referenced by ObOpenObjectByName(), ObpCaptureObjectCreateInformation(), and ObpFreeObjectCreateInformation().

◆ ObpReleaseObjectLock()

FORCEINLINE VOID ObpReleaseObjectLock ( IN POBJECT_HEADER  ObjectHeader)

Definition at line 84 of file ob_x.h.

85 {
86  ULONG Slot;
87  POBJECT_TYPE ObjectType = ObjectHeader->Type;
88 
89  /* Pick a slot */
90  Slot = ObpSelectObjectLockSlot(ObjectHeader);
91 
92  /* Release the resource and leave a critical region */
93  ExReleaseResourceLite(&ObjectType->ObjectLocks[Slot]);
95 
96  /* Sanity check */
98 }
#define KeGetCurrentIrql()
Definition: env_spec_w32.h:706
ObjectType
Definition: metafile.c:80
FORCEINLINE ULONG ObpSelectObjectLockSlot(IN POBJECT_HEADER ObjectHeader)
Definition: ob_x.h:40
#define ASSERT(a)
Definition: mode.c:44
VOID FASTCALL ExReleaseResourceLite(IN PERESOURCE Resource)
Definition: resource.c:1817
#define KeLeaveCriticalRegion()
Definition: ke_x.h:119
unsigned int ULONG
Definition: retypes.h:1
#define APC_LEVEL
Definition: env_spec_w32.h:695

Referenced by NtQuerySymbolicLinkObject(), ObInsertObject(), ObpDecrementHandleCount(), ObpDeleteNameCheck(), ObpIncrementHandleCount(), ObpIncrementUnnamedHandleCount(), ObpReferenceSecurityDescriptor(), ObpSetPermanentObject(), and ObSetSecurityDescriptorInfo().

◆ ObpSelectObjectLockSlot()

FORCEINLINE ULONG ObpSelectObjectLockSlot ( IN POBJECT_HEADER  ObjectHeader)

Definition at line 40 of file ob_x.h.

41 {
42  /* We have 4 locks total, this will return a 0-index slot */
43  return (((ULONG_PTR)ObjectHeader) >> 8) & 3;
44 }
uint32_t ULONG_PTR
Definition: typedefs.h:65

Referenced by ObpAcquireObjectLock(), ObpAcquireObjectLockShared(), and ObpReleaseObjectLock().

◆ ObpValidateAttributes()

FORCEINLINE ULONG ObpValidateAttributes ( IN ULONG  Attributes,
IN KPROCESSOR_MODE  PreviousMode 
)

Definition at line 22 of file ob_x.h.

24 {
25  if (PreviousMode == KernelMode)
26  {
27  /* For kernel, allow any valid attributes */
29  }
30  else
31  {
32  /* For user, mask out kernel-only attributes */
33  return (Attributes & OBJ_VALID_ATTRIBUTES) &
35  }
36 }
#define OBJ_VALID_ATTRIBUTES
Definition: winternl.h:233
#define OBJ_KERNEL_HANDLE
Definition: winternl.h:231
#define OBJ_VALID_KERNEL_ATTRIBUTES
Definition: obtypes.h:92
_In_ KPROCESSOR_MODE PreviousMode
Definition: sefuncs.h:103
_Must_inspect_result_ _In_ WDFDMAENABLER _In_ _In_opt_ PWDF_OBJECT_ATTRIBUTES Attributes

Referenced by NtOpenProcess(), NtOpenProcessTokenEx(), NtOpenThread(), NtOpenThreadTokenEx(), and ProbeAndCaptureObjectAttributes().