mirror of
https://github.com/reactos/reactos.git
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301 lines
7.6 KiB
C
301 lines
7.6 KiB
C
/*
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* PROJECT: Registry manipulation library
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* LICENSE: GPL - See COPYING in the top level directory
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* COPYRIGHT: Copyright 2005 Filip Navara <navaraf@reactos.org>
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* Copyright 2001 - 2005 Eric Kohl
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*/
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#include "cmlib.h"
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#define NDEBUG
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#include <debug.h>
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static BOOLEAN CMAPI
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HvpWriteLog(
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PHHIVE RegistryHive)
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{
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ULONG FileOffset;
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UINT32 BufferSize;
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UINT32 BitmapSize;
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PUCHAR Buffer;
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PUCHAR Ptr;
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ULONG BlockIndex;
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ULONG LastIndex;
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PVOID BlockPtr;
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BOOLEAN Success;
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static ULONG PrintCount = 0;
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if (PrintCount++ == 0)
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{
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UNIMPLEMENTED;
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}
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return TRUE;
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ASSERT(RegistryHive->ReadOnly == FALSE);
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ASSERT(RegistryHive->BaseBlock->Length ==
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RegistryHive->Storage[Stable].Length * HBLOCK_SIZE);
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DPRINT("HvpWriteLog called\n");
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if (RegistryHive->BaseBlock->Sequence1 !=
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RegistryHive->BaseBlock->Sequence2)
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{
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return FALSE;
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}
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BitmapSize = RegistryHive->DirtyVector.SizeOfBitMap;
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BufferSize = HV_LOG_HEADER_SIZE + sizeof(ULONG) + BitmapSize;
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BufferSize = ROUND_UP(BufferSize, HBLOCK_SIZE);
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DPRINT("Bitmap size %u buffer size: %u\n", BitmapSize, BufferSize);
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Buffer = RegistryHive->Allocate(BufferSize, TRUE, TAG_CM);
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if (Buffer == NULL)
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{
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return FALSE;
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}
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/* Update first update counter and CheckSum */
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RegistryHive->BaseBlock->Type = HFILE_TYPE_LOG;
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RegistryHive->BaseBlock->Sequence1++;
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RegistryHive->BaseBlock->CheckSum =
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HvpHiveHeaderChecksum(RegistryHive->BaseBlock);
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/* Copy hive header */
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RtlCopyMemory(Buffer, RegistryHive->BaseBlock, HV_LOG_HEADER_SIZE);
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Ptr = Buffer + HV_LOG_HEADER_SIZE;
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RtlCopyMemory(Ptr, "DIRT", 4);
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Ptr += 4;
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RtlCopyMemory(Ptr, RegistryHive->DirtyVector.Buffer, BitmapSize);
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/* Write hive block and block bitmap */
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FileOffset = 0;
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Success = RegistryHive->FileWrite(RegistryHive, HFILE_TYPE_LOG,
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&FileOffset, Buffer, BufferSize);
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RegistryHive->Free(Buffer, 0);
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if (!Success)
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{
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return FALSE;
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}
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/* Write dirty blocks */
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FileOffset = BufferSize;
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BlockIndex = 0;
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while (BlockIndex < RegistryHive->Storage[Stable].Length)
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{
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LastIndex = BlockIndex;
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BlockIndex = RtlFindSetBits(&RegistryHive->DirtyVector, 1, BlockIndex);
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if (BlockIndex == ~0U || BlockIndex < LastIndex)
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{
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break;
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}
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BlockPtr = (PVOID)RegistryHive->Storage[Stable].BlockList[BlockIndex].BlockAddress;
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/* Write hive block */
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Success = RegistryHive->FileWrite(RegistryHive, HFILE_TYPE_LOG,
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&FileOffset, BlockPtr, HBLOCK_SIZE);
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if (!Success)
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{
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return FALSE;
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}
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BlockIndex++;
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FileOffset += HBLOCK_SIZE;
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}
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Success = RegistryHive->FileSetSize(RegistryHive, HFILE_TYPE_LOG, FileOffset, FileOffset);
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if (!Success)
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{
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DPRINT("FileSetSize failed\n");
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return FALSE;
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}
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/* Flush the log file */
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Success = RegistryHive->FileFlush(RegistryHive, HFILE_TYPE_LOG, NULL, 0);
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if (!Success)
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{
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DPRINT("FileFlush failed\n");
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}
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/* Update second update counter and CheckSum */
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RegistryHive->BaseBlock->Sequence2++;
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RegistryHive->BaseBlock->CheckSum =
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HvpHiveHeaderChecksum(RegistryHive->BaseBlock);
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/* Write hive header again with updated sequence counter. */
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FileOffset = 0;
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Success = RegistryHive->FileWrite(RegistryHive, HFILE_TYPE_LOG,
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&FileOffset, RegistryHive->BaseBlock,
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HV_LOG_HEADER_SIZE);
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if (!Success)
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{
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return FALSE;
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}
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/* Flush the log file */
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Success = RegistryHive->FileFlush(RegistryHive, HFILE_TYPE_LOG, NULL, 0);
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if (!Success)
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{
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DPRINT("FileFlush failed\n");
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}
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return TRUE;
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}
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static BOOLEAN CMAPI
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HvpWriteHive(
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PHHIVE RegistryHive,
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BOOLEAN OnlyDirty)
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{
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ULONG FileOffset;
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ULONG BlockIndex;
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ULONG LastIndex;
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PVOID BlockPtr;
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BOOLEAN Success;
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ASSERT(RegistryHive->ReadOnly == FALSE);
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ASSERT(RegistryHive->BaseBlock->Length ==
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RegistryHive->Storage[Stable].Length * HBLOCK_SIZE);
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DPRINT("HvpWriteHive called\n");
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if (RegistryHive->BaseBlock->Sequence1 !=
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RegistryHive->BaseBlock->Sequence2)
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{
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return FALSE;
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}
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/* Update first update counter and CheckSum */
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RegistryHive->BaseBlock->Type = HFILE_TYPE_PRIMARY;
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RegistryHive->BaseBlock->Sequence1++;
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RegistryHive->BaseBlock->CheckSum =
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HvpHiveHeaderChecksum(RegistryHive->BaseBlock);
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/* Write hive block */
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FileOffset = 0;
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Success = RegistryHive->FileWrite(RegistryHive, HFILE_TYPE_PRIMARY,
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&FileOffset, RegistryHive->BaseBlock,
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sizeof(HBASE_BLOCK));
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if (!Success)
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{
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return FALSE;
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}
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BlockIndex = 0;
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while (BlockIndex < RegistryHive->Storage[Stable].Length)
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{
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if (OnlyDirty)
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{
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LastIndex = BlockIndex;
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BlockIndex = RtlFindSetBits(&RegistryHive->DirtyVector, 1, BlockIndex);
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if (BlockIndex == ~0U || BlockIndex < LastIndex)
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{
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break;
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}
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}
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BlockPtr = (PVOID)RegistryHive->Storage[Stable].BlockList[BlockIndex].BlockAddress;
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FileOffset = (BlockIndex + 1) * HBLOCK_SIZE;
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/* Write hive block */
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Success = RegistryHive->FileWrite(RegistryHive, HFILE_TYPE_PRIMARY,
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&FileOffset, BlockPtr, HBLOCK_SIZE);
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if (!Success)
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{
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return FALSE;
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}
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BlockIndex++;
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}
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Success = RegistryHive->FileFlush(RegistryHive, HFILE_TYPE_PRIMARY, NULL, 0);
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if (!Success)
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{
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DPRINT("FileFlush failed\n");
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}
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/* Update second update counter and CheckSum */
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RegistryHive->BaseBlock->Sequence2++;
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RegistryHive->BaseBlock->CheckSum =
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HvpHiveHeaderChecksum(RegistryHive->BaseBlock);
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/* Write hive block */
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FileOffset = 0;
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Success = RegistryHive->FileWrite(RegistryHive, HFILE_TYPE_PRIMARY,
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&FileOffset, RegistryHive->BaseBlock,
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sizeof(HBASE_BLOCK));
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if (!Success)
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{
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return FALSE;
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}
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Success = RegistryHive->FileFlush(RegistryHive, HFILE_TYPE_PRIMARY, NULL, 0);
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if (!Success)
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{
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DPRINT("FileFlush failed\n");
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}
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return TRUE;
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}
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BOOLEAN CMAPI
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HvSyncHive(
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PHHIVE RegistryHive)
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{
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ASSERT(RegistryHive->ReadOnly == FALSE);
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if (RtlFindSetBits(&RegistryHive->DirtyVector, 1, 0) == ~0U)
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{
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return TRUE;
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}
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/* Update hive header modification time */
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KeQuerySystemTime(&RegistryHive->BaseBlock->TimeStamp);
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/* Update log file */
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if (!HvpWriteLog(RegistryHive))
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{
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return FALSE;
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}
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/* Update hive file */
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if (!HvpWriteHive(RegistryHive, TRUE))
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{
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return FALSE;
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}
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/* Clear dirty bitmap. */
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RtlClearAllBits(&RegistryHive->DirtyVector);
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RegistryHive->DirtyCount = 0;
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return TRUE;
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}
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BOOLEAN
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CMAPI
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HvHiveWillShrink(IN PHHIVE RegistryHive)
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{
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/* No shrinking yet */
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UNIMPLEMENTED;
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return FALSE;
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}
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BOOLEAN CMAPI
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HvWriteHive(
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PHHIVE RegistryHive)
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{
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ASSERT(RegistryHive->ReadOnly == FALSE);
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/* Update hive header modification time */
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KeQuerySystemTime(&RegistryHive->BaseBlock->TimeStamp);
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/* Update hive file */
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if (!HvpWriteHive(RegistryHive, FALSE))
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{
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return FALSE;
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}
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return TRUE;
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}
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