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Write log file header, block bitmap and dirty blocks.

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svn path=/trunk/; revision=4166
This commit is contained in:
Eric Kohl 2003-02-17 19:15:41 +00:00
parent 32bef2128d
commit acea065ea0
2 changed files with 166 additions and 11 deletions
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1
reactos/ntoskrnl/cm/cm.h
View file

@ -247,6 +247,7 @@ typedef struct _REGISTRY_HIVE
UNICODE_STRING LogFileName;
ULONG FileSize;
PHIVE_HEADER HiveHeader;
ULONG UpdateCounter;
ULONG BlockListSize;
PHBIN *BlockList;
ULONG FreeListSize;

176
reactos/ntoskrnl/cm/regfile.c
View file

@ -344,7 +344,7 @@ CmiVerifyHiveHeader(PHIVE_HEADER Header)
assert(Header->Unused7 == 1);
}
}
}
}
@ -611,6 +611,9 @@ CmiInitNonVolatileRegistryHive(PREGISTRY_HIVE RegistryHive,
/* FIXME: Check hive header */
/* Read update counter */
RegistryHive->UpdateCounter = RegistryHive->HiveHeader->UpdateCounter1;
Status = NtQueryInformationFile(FileHandle,
&IoSB,
&fsi,
@ -902,6 +905,156 @@ CmiCalcChecksum(PULONG Buffer)
static NTSTATUS
CmiStartLogUpdate(PREGISTRY_HIVE RegistryHive)
{
OBJECT_ATTRIBUTES ObjectAttributes;
IO_STATUS_BLOCK IoStatusBlock;
HANDLE FileHandle;
LARGE_INTEGER FileOffset;
ULONG BufferSize;
ULONG BitmapSize;
PUCHAR Buffer;
PUCHAR Ptr;
ULONG BlockIndex;
ULONG BlockOffset;
PVOID BlockPtr;
NTSTATUS Status;
DPRINT1("CmiStartLogUpdate() called\n");
BitmapSize = ROUND_UP(RegistryHive->BlockListSize, sizeof(ULONG) * 8) / 8;
BufferSize = sizeof(HIVE_HEADER) +
sizeof(ULONG) +
BitmapSize;
BufferSize = ROUND_UP(BufferSize, 4096);
DPRINT1("Bitmap size %lu buffer size: %lu\n", BitmapSize, BufferSize);
Buffer = (PUCHAR)ExAllocatePool(NonPagedPool, BufferSize);
if (Buffer == NULL)
{
DPRINT1("ExAllocatePool() failed\n");
return(STATUS_INSUFFICIENT_RESOURCES);
}
/* Open log file for writing */
InitializeObjectAttributes(&ObjectAttributes,
&RegistryHive->LogFileName,
0,
NULL,
NULL);
Status = NtCreateFile(&FileHandle,
FILE_ALL_ACCESS,
&ObjectAttributes,
&IoStatusBlock,
NULL,
FILE_ATTRIBUTE_NORMAL,
0,
FILE_SUPERSEDE,
FILE_NON_DIRECTORY_FILE | FILE_SYNCHRONOUS_IO_NONALERT,
NULL,
0);
if (!NT_SUCCESS(Status))
{
DPRINT1("NtCreateFile() failed (Status %lx)\n", Status);
ExFreePool(Buffer);
return(Status);
}
/* Update firt update counter and checksum */
RegistryHive->HiveHeader->UpdateCounter1 = RegistryHive->UpdateCounter + 1;
RegistryHive->HiveHeader->Checksum = CmiCalcChecksum((PULONG)RegistryHive->HiveHeader);
/* Copy hive header */
memcpy(Buffer, RegistryHive->HiveHeader, sizeof(HIVE_HEADER));
Ptr = Buffer + sizeof(HIVE_HEADER);
memcpy(Ptr, "DIRT", 4);
Ptr += 4;
memcpy(Ptr, RegistryHive->DirtyBitMap.Buffer, BitmapSize);
/* Write hive block and block bitmap */
FileOffset.QuadPart = 0ULL;
Status = NtWriteFile(FileHandle,
NULL,
NULL,
NULL,
&IoStatusBlock,
Buffer,
BufferSize,
&FileOffset,
NULL);
if (!NT_SUCCESS(Status))
{
DPRINT1("NtWriteFile() failed (Status %lx)\n", Status);
NtClose(FileHandle);
ExFreePool(Buffer);
return(Status);
}
ExFreePool(Buffer);
/* Write dirty blocks */
FileOffset.QuadPart = (ULONGLONG)BufferSize;
BlockIndex = 0;
while (TRUE)
{
BlockIndex = RtlFindSetBits(&RegistryHive->DirtyBitMap,
1,
BlockIndex);
if (BlockIndex == (ULONG)-1)
{
DPRINT("No more set bits\n");
Status = STATUS_SUCCESS;
break;
}
DPRINT1("Block %lu is dirty\n", BlockIndex);
BlockOffset = RegistryHive->BlockList[BlockIndex]->BlockOffset;
DPRINT1("Block offset %lx\n", BlockOffset);
BlockPtr = RegistryHive->BlockList[BlockIndex] + ((BlockIndex * 4096) - BlockOffset);
DPRINT1("BlockPtr %p\n", BlockPtr);
// FileOffset.QuadPart = (ULONGLONG)(BlockIndex + 1) * 4096ULL;
DPRINT1("File offset %I64x\n", FileOffset.QuadPart);
/* Write hive block */
Status = NtWriteFile(FileHandle,
NULL,
NULL,
NULL,
&IoStatusBlock,
BlockPtr,
REG_BLOCK_SIZE,
&FileOffset,
NULL);
if (!NT_SUCCESS(Status))
{
DPRINT1("NtWriteFile() failed (Status %lx)\n", Status);
NtClose(FileHandle);
return(Status);
}
BlockIndex++;
FileOffset.QuadPart += 4096ULL;
}
/* Flush the log file */
Status = NtFlushBuffersFile(FileHandle,
&IoStatusBlock);
if (!NT_SUCCESS(Status))
{
DPRINT1("NtFlushBuffersFile() failed (Status %lx)\n", Status);
}
NtClose(FileHandle);
return(Status);
return(STATUS_SUCCESS);
}
@ -951,11 +1104,8 @@ CmiStartHiveUpdate(PREGISTRY_HIVE RegistryHive)
return(Status);
}
/* Update hive header */
RegistryHive->HiveHeader->UpdateCounter1++;
NtQuerySystemTime((PTIME)&RegistryHive->HiveHeader->DateModified);
/* Update header checksum */
/* Update firt update counter and checksum */
RegistryHive->HiveHeader->UpdateCounter1 = RegistryHive->UpdateCounter + 1;
RegistryHive->HiveHeader->Checksum = CmiCalcChecksum((PULONG)RegistryHive->HiveHeader);
/* Write hive block */
@ -1069,13 +1219,10 @@ CmiFinishHiveUpdate(PREGISTRY_HIVE RegistryHive)
return(Status);
}
/* Update hive header */
RegistryHive->HiveHeader->UpdateCounter2 = RegistryHive->HiveHeader->UpdateCounter1;
/* Update header checksum */
/* Update second update counter and checksum */
RegistryHive->HiveHeader->UpdateCounter2 = RegistryHive->UpdateCounter + 1;
RegistryHive->HiveHeader->Checksum = CmiCalcChecksum((PULONG)RegistryHive->HiveHeader);
/* Write hive block */
FileOffset.QuadPart = 0ULL;
Status = NtWriteFile(FileHandle,
@ -1127,6 +1274,10 @@ CmiFlushRegistryHive(PREGISTRY_HIVE RegistryHive)
DPRINT1("Log file: '%wZ'\n",
&RegistryHive->LogFileName);
/* Update hive header modification time */
NtQuerySystemTime((PTIME)&RegistryHive->HiveHeader->DateModified);
/* Start log update */
Status = CmiStartLogUpdate(RegistryHive);
if (!NT_SUCCESS(Status))
@ -1159,6 +1310,9 @@ CmiFlushRegistryHive(PREGISTRY_HIVE RegistryHive)
return(Status);
}
/* Increment update counter */
RegistryHive->UpdateCounter++;
/* Clear dirty bitmap and dirty flag */
RtlClearAllBits(&RegistryHive->DirtyBitMap);
RegistryHive->HiveDirty = FALSE;