VirtualBox

source: vbox/trunk/src/VBox/HostDrivers/Support/SUPDrvInternal.h@ 28800

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1/* $Revision: 28800 $ */
2/** @file
3 * VirtualBox Support Driver - Internal header.
4 */
5
6/*
7 * Copyright (C) 2006-2007 Oracle Corporation
8 *
9 * This file is part of VirtualBox Open Source Edition (OSE), as
10 * available from http://www.virtualbox.org. This file is free software;
11 * you can redistribute it and/or modify it under the terms of the GNU
12 * General Public License (GPL) as published by the Free Software
13 * Foundation, in version 2 as it comes in the "COPYING" file of the
14 * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15 * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16 *
17 * The contents of this file may alternatively be used under the terms
18 * of the Common Development and Distribution License Version 1.0
19 * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
20 * VirtualBox OSE distribution, in which case the provisions of the
21 * CDDL are applicable instead of those of the GPL.
22 *
23 * You may elect to license modified versions of this file under the
24 * terms and conditions of either the GPL or the CDDL or both.
25 */
26
27#ifndef ___SUPDrvInternal_h
28#define ___SUPDrvInternal_h
29
30
31/*******************************************************************************
32* Header Files *
33*******************************************************************************/
34#include <VBox/cdefs.h>
35#include <VBox/types.h>
36#include <iprt/assert.h>
37#include <iprt/asm.h>
38#include <VBox/sup.h>
39#include <iprt/memobj.h>
40#include <iprt/time.h>
41#include <iprt/timer.h>
42#include <iprt/string.h>
43#include <iprt/err.h>
44
45#ifdef SUPDRV_AGNOSTIC
46/* do nothing */
47
48#elif defined(RT_OS_WINDOWS)
49 RT_C_DECLS_BEGIN
50# if (_MSC_VER >= 1400) && !defined(VBOX_WITH_PATCHED_DDK)
51# define _InterlockedExchange _InterlockedExchange_StupidDDKVsCompilerCrap
52# define _InterlockedExchangeAdd _InterlockedExchangeAdd_StupidDDKVsCompilerCrap
53# define _InterlockedCompareExchange _InterlockedCompareExchange_StupidDDKVsCompilerCrap
54# define _InterlockedAddLargeStatistic _InterlockedAddLargeStatistic_StupidDDKVsCompilerCrap
55# define _interlockedbittestandset _interlockedbittestandset_StupidDDKVsCompilerCrap
56# define _interlockedbittestandreset _interlockedbittestandreset_StupidDDKVsCompilerCrap
57# define _interlockedbittestandset64 _interlockedbittestandset64_StupidDDKVsCompilerCrap
58# define _interlockedbittestandreset64 _interlockedbittestandreset64_StupidDDKVsCompilerCrap
59# pragma warning(disable : 4163)
60# include <ntddk.h>
61# pragma warning(default : 4163)
62# undef _InterlockedExchange
63# undef _InterlockedExchangeAdd
64# undef _InterlockedCompareExchange
65# undef _InterlockedAddLargeStatistic
66# undef _interlockedbittestandset
67# undef _interlockedbittestandreset
68# undef _interlockedbittestandset64
69# undef _interlockedbittestandreset64
70# else
71# include <ntddk.h>
72# endif
73# include <memory.h>
74# define memcmp(a,b,c) mymemcmp(a,b,c)
75 int VBOXCALL mymemcmp(const void *, const void *, size_t);
76 RT_C_DECLS_END
77
78#elif defined(RT_OS_LINUX)
79# ifndef AUTOCONF_INCLUDED
80# include <linux/autoconf.h>
81# endif
82# include <linux/version.h>
83# if defined(CONFIG_MODVERSIONS) && !defined(MODVERSIONS)
84# define MODVERSIONS
85# if LINUX_VERSION_CODE < KERNEL_VERSION(2, 5, 71)
86# include <linux/modversions.h>
87# endif
88# endif
89# if LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 0)
90# undef ALIGN
91# endif
92# ifndef KBUILD_STR
93# if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 16)
94# define KBUILD_STR(s) s
95# else
96# define KBUILD_STR(s) #s
97# endif
98# endif
99# include <linux/string.h>
100# include <linux/spinlock.h>
101# include <linux/slab.h>
102# if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 27)
103# include <linux/semaphore.h>
104# else /* older kernels */
105# include <asm/semaphore.h>
106# endif /* older kernels */
107# include <linux/timer.h>
108
109# if 0
110# include <linux/hrtimer.h>
111# define VBOX_HRTIMER
112# endif
113
114#elif defined(RT_OS_DARWIN)
115# include <libkern/libkern.h>
116# include <iprt/string.h>
117
118#elif defined(RT_OS_OS2)
119
120#elif defined(RT_OS_FREEBSD)
121# define memset libkern_memset /** @todo these are just hacks to get it compiling, check out later. */
122# define memcmp libkern_memcmp
123# define strchr libkern_strchr
124# define strrchr libkern_strrchr
125# define ffsl libkern_ffsl
126# define fls libkern_fls
127# define flsl libkern_flsl
128# include <sys/libkern.h>
129# undef memset
130# undef memcmp
131# undef strchr
132# undef strrchr
133# undef ffs
134# undef ffsl
135# undef fls
136# undef flsl
137# include <iprt/string.h>
138
139#elif defined(RT_OS_SOLARIS)
140# include <sys/cmn_err.h>
141# include <iprt/string.h>
142
143#else
144# error "unsupported OS."
145#endif
146
147#include "SUPDrvIOC.h"
148#include "SUPDrvIDC.h"
149
150
151
152/*******************************************************************************
153* Defined Constants And Macros *
154*******************************************************************************/
155/*
156 * Hardcoded cookies.
157 */
158#define BIRD 0x64726962 /* 'bird' */
159#define BIRD_INV 0x62697264 /* 'drib' */
160
161
162#ifdef RT_OS_WINDOWS
163/** Use a normal mutex for the loader so we remain at the same IRQL after
164 * taking it.
165 * @todo fix the mutex implementation on linux and make this the default. */
166# define SUPDRV_USE_MUTEX_FOR_LDR
167
168/** Use a normal mutex for the GIP so we remain at the same IRQL after
169 * taking it.
170 * @todo fix the mutex implementation on linux and make this the default. */
171# define SUPDRV_USE_MUTEX_FOR_GIP
172#endif
173
174
175/**
176 * OS debug print macro.
177 */
178#define OSDBGPRINT(a) SUPR0Printf a
179
180
181/** @name Context values for the per-session handle tables.
182 * The context value is used to distiguish between the different kinds of
183 * handles, making the handle table API do all the work.
184 * @{ */
185/** Handle context value for single release event handles. */
186#define SUPDRV_HANDLE_CTX_EVENT ((void *)(uintptr_t)(SUPDRVOBJTYPE_SEM_EVENT))
187/** Handle context value for multiple release event handles. */
188#define SUPDRV_HANDLE_CTX_EVENT_MULTI ((void *)(uintptr_t)(SUPDRVOBJTYPE_SEM_EVENT_MULTI))
189/** @} */
190
191
192/**
193 * Validates a session pointer.
194 *
195 * @returns true/false accordingly.
196 * @param pSession The session.
197 */
198#define SUP_IS_SESSION_VALID(pSession) \
199 ( VALID_PTR(pSession) \
200 && pSession->u32Cookie == BIRD_INV)
201
202
203/*******************************************************************************
204* Structures and Typedefs *
205*******************************************************************************/
206/** Pointer to the device extension. */
207typedef struct SUPDRVDEVEXT *PSUPDRVDEVEXT;
208
209
210/**
211 * Memory reference types.
212 */
213typedef enum
214{
215 /** Unused entry */
216 MEMREF_TYPE_UNUSED = 0,
217 /** Locked memory (r3 mapping only). */
218 MEMREF_TYPE_LOCKED,
219 /** Continous memory block (r3 and r0 mapping). */
220 MEMREF_TYPE_CONT,
221 /** Low memory block (r3 and r0 mapping). */
222 MEMREF_TYPE_LOW,
223 /** Memory block (r3 and r0 mapping). */
224 MEMREF_TYPE_MEM,
225 /** Locked memory (r3 mapping only) allocated by the support driver. */
226 MEMREF_TYPE_PAGE,
227 /** Blow the type up to 32-bit and mark the end. */
228 MEMREG_TYPE_32BIT_HACK = 0x7fffffff
229} SUPDRVMEMREFTYPE, *PSUPDRVMEMREFTYPE;
230
231
232/**
233 * Structure used for tracking memory a session
234 * references in one way or another.
235 */
236typedef struct SUPDRVMEMREF
237{
238 /** The memory object handle. */
239 RTR0MEMOBJ MemObj;
240 /** The ring-3 mapping memory object handle. */
241 RTR0MEMOBJ MapObjR3;
242 /** Type of memory. */
243 SUPDRVMEMREFTYPE eType;
244} SUPDRVMEMREF, *PSUPDRVMEMREF;
245
246
247/**
248 * Bundle of locked memory ranges.
249 */
250typedef struct SUPDRVBUNDLE
251{
252 /** Pointer to the next bundle. */
253 struct SUPDRVBUNDLE * volatile pNext;
254 /** Referenced memory. */
255 SUPDRVMEMREF aMem[64];
256 /** Number of entries used. */
257 uint32_t volatile cUsed;
258} SUPDRVBUNDLE, *PSUPDRVBUNDLE;
259
260
261/**
262 * Loaded image.
263 */
264typedef struct SUPDRVLDRIMAGE
265{
266 /** Next in chain. */
267 struct SUPDRVLDRIMAGE * volatile pNext;
268 /** Pointer to the image. */
269 void *pvImage;
270 /** Pointer to the allocated image buffer.
271 * pvImage is 32-byte aligned or it may governed by the native loader (this
272 * member is NULL then). */
273 void *pvImageAlloc;
274 /** Size of the image including the tables. This is mainly for verification
275 * of the load request. */
276 uint32_t cbImageWithTabs;
277 /** Size of the image. */
278 uint32_t cbImageBits;
279 /** The number of entries in the symbol table. */
280 uint32_t cSymbols;
281 /** Pointer to the symbol table. */
282 PSUPLDRSYM paSymbols;
283 /** The offset of the string table. */
284 char *pachStrTab;
285 /** Size of the string table. */
286 uint32_t cbStrTab;
287 /** Pointer to the optional module initialization callback. */
288 PFNR0MODULEINIT pfnModuleInit;
289 /** Pointer to the optional module termination callback. */
290 PFNR0MODULETERM pfnModuleTerm;
291 /** Service request handler. This is NULL for non-service modules. */
292 PFNSUPR0SERVICEREQHANDLER pfnServiceReqHandler;
293 /** The ldr image state. (IOCtl code of last opration.) */
294 uint32_t uState;
295 /** Usage count. */
296 uint32_t volatile cUsage;
297#ifdef RT_OS_WINDOWS
298 /** The section object for the loaded image (fNative=true). */
299 void *pvNtSectionObj;
300 /** Lock object. */
301 RTR0MEMOBJ hMemLock;
302#endif
303 /** Whether it's loaded by the native loader or not. */
304 bool fNative;
305 /** Image name. */
306 char szName[32];
307} SUPDRVLDRIMAGE, *PSUPDRVLDRIMAGE;
308
309
310/** Image usage record. */
311typedef struct SUPDRVLDRUSAGE
312{
313 /** Next in chain. */
314 struct SUPDRVLDRUSAGE * volatile pNext;
315 /** The image. */
316 PSUPDRVLDRIMAGE pImage;
317 /** Load count. */
318 uint32_t volatile cUsage;
319} SUPDRVLDRUSAGE, *PSUPDRVLDRUSAGE;
320
321
322/**
323 * Component factory registration record.
324 */
325typedef struct SUPDRVFACTORYREG
326{
327 /** Pointer to the next registration. */
328 struct SUPDRVFACTORYREG *pNext;
329 /** Pointer to the registered factory. */
330 PCSUPDRVFACTORY pFactory;
331 /** The session owning the factory.
332 * Used for deregistration and session cleanup. */
333 PSUPDRVSESSION pSession;
334 /** Length of the name. */
335 size_t cchName;
336} SUPDRVFACTORYREG;
337/** Pointer to a component factory registration record. */
338typedef SUPDRVFACTORYREG *PSUPDRVFACTORYREG;
339/** Pointer to a const component factory registration record. */
340typedef SUPDRVFACTORYREG const *PCSUPDRVFACTORYREG;
341
342
343/**
344 * Registered object.
345 * This takes care of reference counting and tracking data for access checks.
346 */
347typedef struct SUPDRVOBJ
348{
349 /** Magic value (SUPDRVOBJ_MAGIC). */
350 uint32_t u32Magic;
351 /** The object type. */
352 SUPDRVOBJTYPE enmType;
353 /** Pointer to the next in the global list. */
354 struct SUPDRVOBJ * volatile pNext;
355 /** Pointer to the object destructor.
356 * This may be set to NULL if the image containing the destructor get unloaded. */
357 PFNSUPDRVDESTRUCTOR pfnDestructor;
358 /** User argument 1. */
359 void *pvUser1;
360 /** User argument 2. */
361 void *pvUser2;
362 /** The total sum of all per-session usage. */
363 uint32_t volatile cUsage;
364 /** The creator user id. */
365 RTUID CreatorUid;
366 /** The creator group id. */
367 RTGID CreatorGid;
368 /** The creator process id. */
369 RTPROCESS CreatorProcess;
370} SUPDRVOBJ, *PSUPDRVOBJ;
371
372/** Magic number for SUPDRVOBJ::u32Magic. (Dame Agatha Mary Clarissa Christie). */
373#define SUPDRVOBJ_MAGIC 0x18900915
374/** Dead number magic for SUPDRVOBJ::u32Magic. */
375#define SUPDRVOBJ_MAGIC_DEAD 0x19760112
376
377/**
378 * The per-session object usage record.
379 */
380typedef struct SUPDRVUSAGE
381{
382 /** Pointer to the next in the list. */
383 struct SUPDRVUSAGE * volatile pNext;
384 /** Pointer to the object we're recording usage for. */
385 PSUPDRVOBJ pObj;
386 /** The usage count. */
387 uint32_t volatile cUsage;
388} SUPDRVUSAGE, *PSUPDRVUSAGE;
389
390
391/**
392 * Per session data.
393 * This is mainly for memory tracking.
394 */
395typedef struct SUPDRVSESSION
396{
397 /** Pointer to the device extension. */
398 PSUPDRVDEVEXT pDevExt;
399 /** Session Cookie. */
400 uint32_t u32Cookie;
401
402 /** The VM associated with the session. */
403 PVM pVM;
404 /** Handle table for IPRT semaphore wrapper APIs.
405 * Programmable from R0 and R3. */
406 RTHANDLETABLE hHandleTable;
407 /** Load usage records. (protected by SUPDRVDEVEXT::mtxLdr) */
408 PSUPDRVLDRUSAGE volatile pLdrUsage;
409
410 /** Spinlock protecting the bundles and the GIP members. */
411 RTSPINLOCK Spinlock;
412 /** The ring-3 mapping of the GIP (readonly). */
413 RTR0MEMOBJ GipMapObjR3;
414 /** Set if the session is using the GIP. */
415 uint32_t fGipReferenced;
416 /** Bundle of locked memory objects. */
417 SUPDRVBUNDLE Bundle;
418 /** List of generic usage records. (protected by SUPDRVDEVEXT::SpinLock) */
419 PSUPDRVUSAGE volatile pUsage;
420
421 /** The user id of the session. (Set by the OS part.) */
422 RTUID Uid;
423 /** The group id of the session. (Set by the OS part.) */
424 RTGID Gid;
425 /** The process (id) of the session. */
426 RTPROCESS Process;
427 /** Which process this session is associated with.
428 * This is NIL_RTR0PROCESS for kernel sessions and valid for user ones. */
429 RTR0PROCESS R0Process;
430#ifndef SUPDRV_AGNOSTIC
431# if defined(RT_OS_DARWIN)
432 /** Pointer to the associated org_virtualbox_SupDrvClient object. */
433 void *pvSupDrvClient;
434 /** Whether this session has been opened or not. */
435 bool fOpened;
436# endif
437# if defined(RT_OS_OS2)
438 /** The system file number of this session. */
439 uint16_t sfn;
440 uint16_t Alignment; /**< Alignment */
441# endif
442# if defined(RT_OS_DARWIN) || defined(RT_OS_OS2) || defined(RT_OS_SOLARIS)
443 /** Pointer to the next session with the same hash. */
444 PSUPDRVSESSION pNextHash;
445# endif
446#endif /* !SUPDRV_AGNOSTIC */
447} SUPDRVSESSION;
448
449
450/**
451 * Device extension.
452 */
453typedef struct SUPDRVDEVEXT
454{
455 /** Spinlock to serialize the initialization, usage counting and objects. */
456 RTSPINLOCK Spinlock;
457
458 /** List of registered objects. Protected by the spinlock. */
459 PSUPDRVOBJ volatile pObjs;
460 /** List of free object usage records. */
461 PSUPDRVUSAGE volatile pUsageFree;
462
463 /** Global cookie. */
464 uint32_t u32Cookie;
465 /** The actual size of SUPDRVSESSION. (SUPDRV_AGNOSTIC) */
466 uint32_t cbSession;
467
468 /** Loader mutex.
469 * This protects pvVMMR0, pvVMMR0Entry, pImages and SUPDRVSESSION::pLdrUsage. */
470#ifdef SUPDRV_USE_MUTEX_FOR_LDR
471 RTSEMMUTEX mtxLdr;
472#else
473 RTSEMFASTMUTEX mtxLdr;
474#endif
475
476 /** VMM Module 'handle'.
477 * 0 if the code VMM isn't loaded and Idt are nops. */
478 void * volatile pvVMMR0;
479 /** VMMR0EntryInt() pointer. */
480 DECLR0CALLBACKMEMBER(int, pfnVMMR0EntryInt, (PVM pVM, unsigned uOperation, void *pvArg));
481 /** VMMR0EntryFast() pointer. */
482 DECLR0CALLBACKMEMBER(void, pfnVMMR0EntryFast, (PVM pVM, VMCPUID idCpu, unsigned uOperation));
483 /** VMMR0EntryEx() pointer. */
484 DECLR0CALLBACKMEMBER(int, pfnVMMR0EntryEx, (PVM pVM, VMCPUID idCpu, unsigned uOperation, PSUPVMMR0REQHDR pReq, uint64_t u64Arg, PSUPDRVSESSION pSession));
485
486 /** Linked list of loaded code. */
487 PSUPDRVLDRIMAGE volatile pLdrImages;
488
489 /** GIP mutex.
490 * Any changes to any of the GIP members requires ownership of this mutex,
491 * except on driver init and termination. */
492#ifdef SUPDRV_USE_MUTEX_FOR_GIP
493 RTSEMMUTEX mtxGip;
494#else
495 RTSEMFASTMUTEX mtxGip;
496#endif
497 /** Pointer to the Global Info Page (GIP). */
498 PSUPGLOBALINFOPAGE pGip;
499 /** The physical address of the GIP. */
500 RTHCPHYS HCPhysGip;
501 /** Number of processes using the GIP.
502 * (The updates are suspend while cGipUsers is 0.)*/
503 uint32_t volatile cGipUsers;
504 /** The ring-0 memory object handle for the GIP page. */
505 RTR0MEMOBJ GipMemObj;
506 /** The GIP timer handle. */
507 PRTTIMER pGipTimer;
508 /** If non-zero we've successfully called RTTimerRequestSystemGranularity(). */
509 uint32_t u32SystemTimerGranularityGrant;
510 /** The CPU id of the GIP master.
511 * This CPU is responsible for the updating the common GIP data. */
512 RTCPUID volatile idGipMaster;
513
514 /** Component factory mutex.
515 * This protects pComponentFactoryHead and component factory querying. */
516 RTSEMFASTMUTEX mtxComponentFactory;
517 /** The head of the list of registered component factories. */
518 PSUPDRVFACTORYREG pComponentFactoryHead;
519
520#ifndef SUPDRV_AGNOSTIC
521# ifdef RT_OS_WINDOWS
522 /* Callback object returned by ExCreateCallback. */
523 PCALLBACK_OBJECT pObjPowerCallback;
524 /* Callback handle returned by ExRegisterCallback. */
525 PVOID hPowerCallback;
526# endif
527#endif
528} SUPDRVDEVEXT;
529
530
531RT_C_DECLS_BEGIN
532
533/*******************************************************************************
534* OS Specific Functions *
535*******************************************************************************/
536void VBOXCALL supdrvOSObjInitCreator(PSUPDRVOBJ pObj, PSUPDRVSESSION pSession);
537bool VBOXCALL supdrvOSObjCanAccess(PSUPDRVOBJ pObj, PSUPDRVSESSION pSession, const char *pszObjName, int *prc);
538bool VBOXCALL supdrvOSGetForcedAsyncTscMode(PSUPDRVDEVEXT pDevExt);
539int VBOXCALL supdrvOSEnableVTx(bool fEnabled);
540
541/**
542 * Try open the image using the native loader.
543 *
544 * @returns IPRT status code.
545 * @retval VERR_NOT_SUPPORTED if native loading isn't supported.
546 *
547 * @param pDevExt The device globals.
548 * @param pImage The image handle. pvImage should be set on
549 * success, pvImageAlloc can also be set if
550 * appropriate.
551 * @param pszFilename The file name - UTF-8, may containg UNIX
552 * slashes on non-UNIX systems.
553 */
554int VBOXCALL supdrvOSLdrOpen(PSUPDRVDEVEXT pDevExt, PSUPDRVLDRIMAGE pImage, const char *pszFilename);
555
556/**
557 * Validates an entry point address.
558 *
559 * Called before supdrvOSLdrLoad.
560 *
561 * @returns IPRT status code.
562 * @param pDevExt The device globals.
563 * @param pImage The image data (still in the open state).
564 * @param pv The address within the image.
565 * @param pbImageBits The image bits as loaded by ring-3.
566 */
567int VBOXCALL supdrvOSLdrValidatePointer(PSUPDRVDEVEXT pDevExt, PSUPDRVLDRIMAGE pImage,
568 void *pv, const uint8_t *pbImageBits);
569
570/**
571 * Load the image.
572 *
573 * @returns IPRT status code.
574 * @param pDevExt The device globals.
575 * @param pImage The image data (up to date except for some
576 * entry point pointers).
577 * @param pbImageBits The image bits as loaded by ring-3.
578 */
579int VBOXCALL supdrvOSLdrLoad(PSUPDRVDEVEXT pDevExt, PSUPDRVLDRIMAGE pImage, const uint8_t *pbImageBits);
580
581
582/**
583 * Unload the image.
584 *
585 * @param pDevExt The device globals.
586 * @param pImage The image data (mostly still valid).
587 */
588void VBOXCALL supdrvOSLdrUnload(PSUPDRVDEVEXT pDevExt, PSUPDRVLDRIMAGE pImage);
589
590
591/*******************************************************************************
592* Shared Functions *
593*******************************************************************************/
594/* SUPDrv.c */
595int VBOXCALL supdrvIOCtl(uintptr_t uIOCtl, PSUPDRVDEVEXT pDevExt, PSUPDRVSESSION pSession, PSUPREQHDR pReqHdr);
596int VBOXCALL supdrvIOCtlFast(uintptr_t uIOCtl, VMCPUID idCpu, PSUPDRVDEVEXT pDevExt, PSUPDRVSESSION pSession);
597int VBOXCALL supdrvIDC(uintptr_t uIOCtl, PSUPDRVDEVEXT pDevExt, PSUPDRVSESSION pSession, PSUPDRVIDCREQHDR pReqHdr);
598int VBOXCALL supdrvInitDevExt(PSUPDRVDEVEXT pDevExt, size_t cbSession);
599void VBOXCALL supdrvDeleteDevExt(PSUPDRVDEVEXT pDevExt);
600int VBOXCALL supdrvCreateSession(PSUPDRVDEVEXT pDevExt, bool fUser, PSUPDRVSESSION *ppSession);
601void VBOXCALL supdrvCloseSession(PSUPDRVDEVEXT pDevExt, PSUPDRVSESSION pSession);
602void VBOXCALL supdrvCleanupSession(PSUPDRVDEVEXT pDevExt, PSUPDRVSESSION pSession);
603
604RT_C_DECLS_END
605
606#endif
607
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