ReactOS  0.4.15-dev-4874-g57c84dd
fs.c
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1 /*
2  * COPYRIGHT: See COPYING in the top level directory
3  * PROJECT: ReactOS kernel
4  * FILE: ntoskrnl/cc/fs.c
5  * PURPOSE: Implements cache managers functions useful for File Systems
6  *
7  * PROGRAMMERS: Alex Ionescu
8  */
9 
10 /* INCLUDES ******************************************************************/
11 
12 #include <ntoskrnl.h>
13 
14 #define NDEBUG
15 #include <debug.h>
16 
17 /* FUNCTIONS *****************************************************************/
18 
19 /*
20  * @unimplemented
21  */
23 NTAPI
26  IN PDIRTY_PAGE_ROUTINE DirtyPageRoutine,
29 {
31 
32  CCTRACE(CC_API_DEBUG, "LogHandle=%p DirtyPageRoutine=%p Context1=%p Context2=%p\n",
33  LogHandle, DirtyPageRoutine, Context1, Context2);
34 
36  i.QuadPart = 0;
37  return i;
38 }
39 
40 /*
41  * @implemented
42  */
44 NTAPI
46  IN PVOID Bcb)
47 {
49 
50  CCTRACE(CC_API_DEBUG, "Bcb=%p\n", Bcb);
51 
52  return iBcb->Vacb->SharedCacheMap->FileObject;
53 }
54 
55 /*
56  * @unimplemented
57  */
59 NTAPI
62  OUT PLARGE_INTEGER OldestLsn OPTIONAL)
63 {
65 
66  CCTRACE(CC_API_DEBUG, "FileObject=%p\n", FileObject);
67 
69  i.QuadPart = 0;
70  return i;
71 }
72 
73 /*
74  * @unimplemented
75  */
76 VOID
77 NTAPI
81  IN BOOLEAN PinAccess,
82  IN PCACHE_MANAGER_CALLBACKS CallBacks,
83  IN PVOID LazyWriterContext)
84 {
86 
89 
90  CCTRACE(CC_API_DEBUG, "FileObject=%p FileSizes=%p PinAccess=%d CallBacks=%p LazyWriterContext=%p\n",
91  FileObject, FileSizes, PinAccess, CallBacks, LazyWriterContext);
92 
93  /* Call old ROS cache init function */
95  FileSizes,
96  PinAccess,
97  CallBacks,
98  LazyWriterContext);
99  if (!NT_SUCCESS(Status))
101 }
102 
103 /*
104  * @implemented
105  */
106 BOOLEAN
107 NTAPI
109  IN PVPB Vpb)
110 {
111  PROS_VACB Vacb;
113  KIRQL oldIrql;
114  /* Assume no dirty data */
115  BOOLEAN Dirty = FALSE;
116 
117  CCTRACE(CC_API_DEBUG, "Vpb=%p\n", Vpb);
118 
120 
121  /* Browse dirty VACBs */
123  {
124  Vacb = CONTAINING_RECORD(Entry, ROS_VACB, DirtyVacbListEntry);
125  /* Look for these associated with our volume */
126  if (Vacb->SharedCacheMap->FileObject->Vpb != Vpb)
127  {
128  continue;
129  }
130 
131  /* From now on, we are associated with our VPB */
132 
133  /* Temporary files are not counted as dirty */
135  {
136  continue;
137  }
138 
139  /* A single dirty VACB is enough to have dirty data */
140  if (Vacb->Dirty)
141  {
142  Dirty = TRUE;
143  break;
144  }
145  }
146 
148 
149  return Dirty;
150 }
151 
152 /*
153  * @unimplemented
154  */
155 BOOLEAN
156 NTAPI
160  IN ULONG Length,
161  IN BOOLEAN UninitializeCacheMaps)
162 {
163  PROS_SHARED_CACHE_MAP SharedCacheMap;
164  PPRIVATE_CACHE_MAP PrivateCacheMap;
165  LONGLONG StartOffset;
166  LONGLONG EndOffset;
167  LIST_ENTRY FreeList;
168  KIRQL OldIrql;
169  PLIST_ENTRY ListEntry;
170  PROS_VACB Vacb;
171  LONGLONG ViewEnd;
173 
174  CCTRACE(CC_API_DEBUG, "SectionObjectPointer=%p\n FileOffset=%p Length=%lu UninitializeCacheMaps=%d",
175  SectionObjectPointer, FileOffset, Length, UninitializeCacheMaps);
176 
177  /* Obtain the shared cache from the section */
178  SharedCacheMap = SectionObjectPointer->SharedCacheMap;
179  if (!SharedCacheMap)
180  {
181  Success = TRUE;
182  goto purgeMm;
183  }
184 
185  if (UninitializeCacheMaps)
186  {
187  /*
188  * We have gotten the acknowledgement that
189  * the caller wants to unintialize the private
190  * cache maps so let's do this. Since we already
191  * have the shared cache map from above, iterate
192  * over that cache's private lists.
193  */
194  while (!IsListEmpty(&SharedCacheMap->PrivateList))
195  {
196  /*
197  * This list is not empty, grab the
198  * private cache map.
199  */
200  PrivateCacheMap = CONTAINING_RECORD(SharedCacheMap->PrivateList.Flink, PRIVATE_CACHE_MAP, PrivateLinks);
201 
202  /* Unintialize the private cache now */
203  CcUninitializeCacheMap(PrivateCacheMap->FileObject, NULL, NULL);
204  }
205  }
206 
207  StartOffset = FileOffset != NULL ? FileOffset->QuadPart : 0;
208  if (Length == 0 || FileOffset == NULL)
209  {
210  EndOffset = MAXLONGLONG;
211  }
212  else
213  {
214  EndOffset = StartOffset + Length;
215  ASSERT(EndOffset > StartOffset);
216  }
217 
218  InitializeListHead(&FreeList);
219 
220  /* Assume success */
221  Success = TRUE;
222 
224  KeAcquireSpinLockAtDpcLevel(&SharedCacheMap->CacheMapLock);
225  ListEntry = SharedCacheMap->CacheMapVacbListHead.Flink;
226  while (ListEntry != &SharedCacheMap->CacheMapVacbListHead)
227  {
228  ULONG Refs;
229 
230  Vacb = CONTAINING_RECORD(ListEntry, ROS_VACB, CacheMapVacbListEntry);
231  ListEntry = ListEntry->Flink;
232 
233  /* Skip VACBs outside the range, or only partially in range */
234  if (Vacb->FileOffset.QuadPart < StartOffset)
235  {
236  continue;
237  }
239  SharedCacheMap->SectionSize.QuadPart);
240  if (ViewEnd >= EndOffset)
241  {
242  break;
243  }
244 
245  /* Still in use, it cannot be purged, fail
246  * Allow one ref: VACB is supposed to be always 1-referenced
247  */
248  Refs = CcRosVacbGetRefCount(Vacb);
249  if ((Refs > 1 && !Vacb->Dirty) ||
250  (Refs > 2 && Vacb->Dirty))
251  {
252  Success = FALSE;
253  break;
254  }
255 
256  /* This VACB is in range, so unlink it and mark for free */
257  ASSERT(Refs == 1 || Vacb->Dirty);
260  if (Vacb->Dirty)
261  {
263  }
265  InsertHeadList(&FreeList, &Vacb->CacheMapVacbListEntry);
266  }
269 
270  while (!IsListEmpty(&FreeList))
271  {
272  ULONG Refs;
273 
274  Vacb = CONTAINING_RECORD(RemoveHeadList(&FreeList),
275  ROS_VACB,
276  CacheMapVacbListEntry);
278  Refs = CcRosVacbDecRefCount(Vacb);
279  ASSERT(Refs == 0);
280  }
281 
282  /* Now make sure that Mm doesn't hold some pages here. */
283 purgeMm:
284  if (Success)
286 
287  return Success;
288 }
289 
290 
291 /*
292  * @implemented
293  */
294 VOID NTAPI
298 {
299  KIRQL OldIrql;
300  PROS_SHARED_CACHE_MAP SharedCacheMap;
301  LARGE_INTEGER OldSectionSize;
302 
303  CCTRACE(CC_API_DEBUG, "FileObject=%p FileSizes=%p\n",
305 
306  DPRINT("CcSetFileSizes(FileObject 0x%p, FileSizes 0x%p)\n",
308  DPRINT("AllocationSize %I64d, FileSize %I64d, ValidDataLength %I64d\n",
312 
313  SharedCacheMap = FileObject->SectionObjectPointer->SharedCacheMap;
314 
315  /*
316  * It is valid to call this function on file objects that weren't
317  * initialized for caching. In this case it's simple no-op.
318  */
319  if (SharedCacheMap == NULL)
320  return;
321 
322  /* Update the relevant fields */
323  KeAcquireSpinLock(&SharedCacheMap->CacheMapLock, &OldIrql);
324  OldSectionSize = SharedCacheMap->SectionSize;
325  SharedCacheMap->SectionSize = FileSizes->AllocationSize;
326  SharedCacheMap->FileSize = FileSizes->FileSize;
327  SharedCacheMap->ValidDataLength = FileSizes->ValidDataLength;
328  KeReleaseSpinLock(&SharedCacheMap->CacheMapLock, OldIrql);
329 
330  if (FileSizes->AllocationSize.QuadPart < OldSectionSize.QuadPart)
331  {
332  CcPurgeCacheSection(FileObject->SectionObjectPointer,
334  0,
335  FALSE);
336  }
337  else
338  {
339  /* Extend our section object */
340  MmExtendSection(SharedCacheMap->Section, &SharedCacheMap->SectionSize);
341  }
342 }
343 
344 /*
345  * @unimplemented
346  */
347 VOID
348 NTAPI
352  IN PFLUSH_TO_LSN FlushToLsnRoutine)
353 {
354  CCTRACE(CC_API_DEBUG, "FileObject=%p LogHandle=%p FlushToLsnRoutine=%p\n",
355  FileObject, LogHandle, FlushToLsnRoutine);
356 
358 }
359 
360 /*
361  * @unimplemented
362  */
363 BOOLEAN
364 NTAPI
367  IN PLARGE_INTEGER TruncateSize OPTIONAL,
368  IN PCACHE_UNINITIALIZE_EVENT UninitializeCompleteEvent OPTIONAL)
369 {
371  PROS_SHARED_CACHE_MAP SharedCacheMap;
372  KIRQL OldIrql;
373 
374  CCTRACE(CC_API_DEBUG, "FileObject=%p TruncateSize=%p UninitializeCompleteEvent=%p\n",
375  FileObject, TruncateSize, UninitializeCompleteEvent);
376 
377  if (TruncateSize != NULL &&
378  FileObject->SectionObjectPointer->SharedCacheMap != NULL)
379  {
380  SharedCacheMap = FileObject->SectionObjectPointer->SharedCacheMap;
381  KeAcquireSpinLock(&SharedCacheMap->CacheMapLock, &OldIrql);
382  if (SharedCacheMap->FileSize.QuadPart > TruncateSize->QuadPart)
383  {
384  SharedCacheMap->FileSize = *TruncateSize;
385  }
386  KeReleaseSpinLock(&SharedCacheMap->CacheMapLock, OldIrql);
387  CcPurgeCacheSection(FileObject->SectionObjectPointer,
388  TruncateSize,
389  0,
390  FALSE);
391  }
392 
394  if (UninitializeCompleteEvent)
395  {
396  KeSetEvent(&UninitializeCompleteEvent->Event, IO_NO_INCREMENT, FALSE);
397  }
398  return NT_SUCCESS(Status);
399 }
400 
401 BOOLEAN
402 NTAPI
406 {
407  PROS_SHARED_CACHE_MAP SharedCacheMap;
408 
409  SharedCacheMap = FileObject->SectionObjectPointer->SharedCacheMap;
410 
411  if (!SharedCacheMap)
412  return FALSE;
413 
414  FileSizes->AllocationSize = SharedCacheMap->SectionSize;
415  FileSizes->FileSize = FileSizes->ValidDataLength = SharedCacheMap->FileSize;
416  return TRUE;
417 }
NTSTATUS NTAPI MmExtendSection(_In_ PVOID Section, _Inout_ PLARGE_INTEGER NewSize)
Definition: section.c:5124
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#define IN
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_In_ ULONG _In_ ULONG _In_ ULONG Length
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IN PVCB IN VBO IN ULONG OUT PBCB * Bcb
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struct _Entry Entry
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Definition: fs.c:365
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Definition: spinlock.c:198
LONG NTSTATUS
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#define MAXLONGLONG
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Status
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* PFILE_OBJECT
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LARGE_INTEGER ValidDataLength
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Definition: spinlock.c:108
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GLsizei GLenum const GLvoid GLsizei GLenum GLbyte GLbyte GLbyte GLdouble GLdouble GLdouble GLfloat GLfloat GLfloat GLint GLint GLint GLshort GLshort GLshort GLubyte GLubyte GLubyte GLuint GLuint GLuint GLushort GLushort GLushort GLbyte GLbyte GLbyte GLbyte GLdouble GLdouble GLdouble GLdouble GLfloat GLfloat GLfloat GLfloat GLint GLint GLint GLint GLshort GLshort GLshort GLshort GLubyte GLubyte GLubyte GLubyte GLuint GLuint GLuint GLuint GLushort GLushort GLushort GLushort GLboolean const GLdouble const GLfloat const GLint const GLshort const GLbyte const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLdouble const GLfloat const GLfloat const GLint const GLint const GLshort const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort GLenum GLenum GLenum GLfloat GLenum GLint GLenum GLenum GLenum GLfloat GLenum GLenum GLint GLenum GLfloat GLenum GLint GLint GLushort GLenum GLenum GLfloat GLenum GLenum GLint GLfloat const GLubyte GLenum GLenum GLenum const GLfloat GLenum GLenum const GLint GLenum GLint GLint GLsizei GLsizei GLint GLenum GLenum const GLvoid GLenum GLenum const GLfloat GLenum GLenum const GLint GLenum GLenum const GLdouble GLenum GLenum const GLfloat GLenum GLenum const GLint GLsizei GLuint GLfloat GLuint GLbitfield GLfloat GLint GLuint GLboolean GLenum GLfloat GLenum GLbitfield GLenum GLfloat GLfloat GLint GLint const GLfloat GLenum GLfloat GLfloat GLint GLint GLfloat GLfloat GLint GLint const GLfloat GLint GLfloat GLfloat GLint GLfloat GLfloat GLint GLfloat GLfloat const GLdouble const GLfloat const GLdouble const GLfloat GLint i
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