From 2f1849aae9ec6fc7d2cead067e79ad3c9e7b2a71 Mon Sep 17 00:00:00 2001 From: jean Date: Mon, 15 Feb 1999 11:25:23 +0000 Subject: [PATCH] add a read buffer of one cluster for each file svn path=/trunk/; revision=230 --- reactos/drivers/fs/vfat/iface.c | 144 ++++++++++++++++++++------------ 1 file changed, 92 insertions(+), 52 deletions(-) diff --git a/reactos/drivers/fs/vfat/iface.c b/reactos/drivers/fs/vfat/iface.c index acf76df8d29..b59ff1d9a14 100644 --- a/reactos/drivers/fs/vfat/iface.c +++ b/reactos/drivers/fs/vfat/iface.c @@ -617,12 +617,16 @@ NTSTATUS FindFile(PDEVICE_EXTENSION DeviceExt, PVfatFCB Fcb, return(STATUS_SUCCESS); } } + TempFcb.Buffer=NULL; if (Parent==NULL) { memset(&TempFcb,0,sizeof(VfatFCB)); memset(TempFcb.entry.Filename,' ',11); TempFcb.entry.FileSize=DeviceExt->rootDirectorySectors*BLOCKSIZE; TempFcb.entry.Attrib=FILE_ATTRIBUTE_DIRECTORY; + TempFcb.Buffer=ExAllocatePool(NonPagedPool,DeviceExt->BytesPerCluster); + TempFcb.Cluster=0xFFFFFFFF; + TempFcb.Flags=0; if (DeviceExt->FatType == FAT32) TempFcb.entry.FirstCluster=2; else @@ -650,11 +654,13 @@ NTSTATUS FindFile(PDEVICE_EXTENSION DeviceExt, PVfatFCB Fcb, memcpy(&Fcb->entry,&FatEntry,sizeof(FATDirEntry)); vfat_wcsncpy(Fcb->ObjectName,name,MAX_PATH); if(Entry) *Entry=i; + if(TempFcb.Buffer) ExFreePool(TempFcb.Buffer); return(STATUS_SUCCESS); } } } if(Entry) *Entry=i; + if(TempFcb.Buffer) ExFreePool(TempFcb.Buffer); return(STATUS_UNSUCCESSFUL); } @@ -667,8 +673,11 @@ NTSTATUS FsdCloseFile(PDEVICE_EXTENSION DeviceExt, PFILE_OBJECT FileObject) PVfatFCB pFcb; PVfatCCB pCcb; //FIXME : update entry in directory ? + assert(FileObject); pCcb = (PVfatCCB)(FileObject->FsContext2); + if(!pCcb) return STATUS_UNSUCCESSFUL; pFcb = pCcb->pFcb; + assert(pFcb); pFcb->RefCount--; if(pFcb->RefCount<=0) { @@ -678,6 +687,7 @@ NTSTATUS FsdCloseFile(PDEVICE_EXTENSION DeviceExt, PFILE_OBJECT FileObject) pFirstFcb=pFcb->nextFcb; if(pFcb->nextFcb) pFcb->nextFcb->prevFcb=pFcb->prevFcb; + ExFreePool(pFcb->Buffer); ExFreePool(pFcb); } ExFreePool(pCcb); @@ -707,7 +717,6 @@ NTSTATUS FsdOpenFile(PDEVICE_EXTENSION DeviceExt, PFILE_OBJECT FileObject, // treat relative name if(FileObject->RelatedFileObject) { -DbgPrint("try related for %w\n",FileName); pRelFileObject=FileObject->RelatedFileObject; pRelCcb=pRelFileObject->FsContext2; assert(pRelCcb); @@ -753,12 +762,20 @@ DbgPrint("try related for %w\n",FileName); Fcb = ExAllocatePool(NonPagedPool, sizeof(VfatFCB)); memset(Fcb,0,sizeof(VfatFCB)); Fcb->ObjectName=Fcb->PathName; + Fcb->Buffer=ExAllocatePool(NonPagedPool,DeviceExt->BytesPerCluster); + Fcb->Cluster=0xFFFFFFFF; + Fcb->Flags=0; next = &string[0]; current = next+1; if(*next==0) // root { - Status = FindFile(DeviceExt,Fcb,ParentFcb,next,NULL); + memset(Fcb->entry.Filename,' ',11); + Fcb->entry.FileSize=DeviceExt->rootDirectorySectors*BLOCKSIZE; + Fcb->entry.Attrib=FILE_ATTRIBUTE_DIRECTORY; + if (DeviceExt->FatType == FAT32) + Fcb->entry.FirstCluster=2; + else Fcb->entry.FirstCluster=1;//FIXME : is 1 the good value for mark root? ParentFcb=Fcb; Fcb=NULL; } @@ -786,6 +803,9 @@ DbgPrint("try related for %w\n",FileName); Fcb = ExAllocatePool(NonPagedPool,sizeof(VfatFCB)); memset(Fcb,0,sizeof(VfatFCB)); Fcb->ObjectName=Fcb->PathName; + Fcb->Buffer=ExAllocatePool(NonPagedPool,DeviceExt->BytesPerCluster); + Fcb->Cluster=0xFFFFFFFF; + Fcb->Flags=0; } else Fcb = ParentFcb; ParentFcb = Temp; @@ -799,12 +819,18 @@ DbgPrint("try related for %w\n",FileName); newCCB->PtrFileObject=FileObject; ParentFcb->RefCount++; //FIXME : initialize all fields in FCB and CCB + ParentFcb->Cluster=0xFFFFFFFF; + ParentFcb->Flags=0; ParentFcb->nextFcb=pFirstFcb; pFirstFcb=ParentFcb; vfat_wcsncpy(ParentFcb->PathName,FileName,MAX_PATH); ParentFcb->ObjectName=ParentFcb->PathName+(current-FileName); ParentFcb->pDevExt=DeviceExt; - if(Fcb) ExFreePool(Fcb); + if(Fcb) + { + ExFreePool(Fcb->Buffer); + ExFreePool(Fcb); + } if(AbsFileName)ExFreePool(AbsFileName); return(STATUS_SUCCESS); } @@ -922,12 +948,14 @@ NTSTATUS FsdReadFile(PDEVICE_EXTENSION DeviceExt, PVfatFCB Fcb, ULONG CurrentCluster; ULONG FileOffset; ULONG FirstCluster; - PVOID Temp; +// PVOID Temp; ULONG TempLength; /* PRECONDITION */ assert(DeviceExt != NULL); assert(DeviceExt->BytesPerCluster != 0); + assert(Fcb); + assert(Fcb->Buffer != NULL); if (DeviceExt->FatType == FAT32) CurrentCluster = Fcb->entry.FirstCluster @@ -946,9 +974,6 @@ NTSTATUS FsdReadFile(PDEVICE_EXTENSION DeviceExt, PVfatFCB Fcb, Length = Fcb->entry.FileSize - ReadOffset; } *LengthRead = 0; - /* FIXME: optimize by remembering the last cluster read and using if possible */ - Temp = ExAllocatePool(NonPagedPool,DeviceExt->BytesPerCluster); - if(!Temp) return STATUS_UNSUCCESSFUL; if (FirstCluster==1) { //root of FAT16 or FAT12 CurrentCluster=DeviceExt->rootStart+ReadOffset @@ -964,19 +989,23 @@ NTSTATUS FsdReadFile(PDEVICE_EXTENSION DeviceExt, PVfatFCB Fcb, { if (FirstCluster==1) { - VFATReadSectors(DeviceExt->StorageDevice,CurrentCluster - ,DeviceExt->Boot->SectorsPerCluster,Temp); + if(CurrentCluster!=Fcb->Cluster) + VFATReadSectors(DeviceExt->StorageDevice,CurrentCluster + ,DeviceExt->Boot->SectorsPerCluster,Fcb->Buffer); + Fcb->Cluster=CurrentCluster; CurrentCluster += DeviceExt->Boot->SectorsPerCluster; } else { - VFATLoadCluster(DeviceExt,Temp,CurrentCluster); + if(CurrentCluster!=Fcb->Cluster) + VFATLoadCluster(DeviceExt,Fcb->Buffer,CurrentCluster); + Fcb->Cluster=CurrentCluster; CurrentCluster = GetNextCluster(DeviceExt, CurrentCluster); } TempLength = min(Length,DeviceExt->BytesPerCluster - (ReadOffset % DeviceExt->BytesPerCluster)); - memcpy(Buffer, Temp + ReadOffset % DeviceExt->BytesPerCluster, + memcpy(Buffer, Fcb->Buffer + ReadOffset % DeviceExt->BytesPerCluster, TempLength); (*LengthRead) = (*LengthRead) + TempLength; @@ -987,42 +1016,49 @@ NTSTATUS FsdReadFile(PDEVICE_EXTENSION DeviceExt, PVfatFCB Fcb, { if (FirstCluster==1) { - VFATReadSectors(DeviceExt->StorageDevice,CurrentCluster - ,DeviceExt->Boot->SectorsPerCluster,Buffer); + if(CurrentCluster!=Fcb->Cluster) + VFATReadSectors(DeviceExt->StorageDevice,CurrentCluster + ,DeviceExt->Boot->SectorsPerCluster,Fcb->Buffer); + Fcb->Cluster=CurrentCluster; CurrentCluster += DeviceExt->Boot->SectorsPerCluster; } else { - VFATLoadCluster(DeviceExt,Buffer,CurrentCluster); + if(CurrentCluster!=Fcb->Cluster) + VFATLoadCluster(DeviceExt,Fcb->Buffer,CurrentCluster); + Fcb->Cluster=CurrentCluster; CurrentCluster = GetNextCluster(DeviceExt, CurrentCluster); } - if (CurrentCluster == 0xffffffff) + memcpy(Buffer, Fcb->Buffer, DeviceExt->BytesPerCluster); + if (CurrentCluster == 0xffffffff) { - ExFreePool(Temp); return(STATUS_SUCCESS); } (*LengthRead) = (*LengthRead) + DeviceExt->BytesPerCluster; Buffer = Buffer + DeviceExt->BytesPerCluster; Length = Length - DeviceExt->BytesPerCluster; - } + } if (Length > 0) - { + { (*LengthRead) = (*LengthRead) + Length; if (FirstCluster==1) - { + { + if(CurrentCluster!=Fcb->Cluster) VFATReadSectors(DeviceExt->StorageDevice,CurrentCluster - ,DeviceExt->Boot->SectorsPerCluster,Temp); - CurrentCluster += DeviceExt->Boot->SectorsPerCluster; - } + ,DeviceExt->Boot->SectorsPerCluster,Fcb->Buffer); + Fcb->Cluster=CurrentCluster; + CurrentCluster += DeviceExt->Boot->SectorsPerCluster; + } else { - VFATLoadCluster(DeviceExt,Temp,CurrentCluster); + if(CurrentCluster!=Fcb->Cluster) + VFATLoadCluster(DeviceExt,Fcb->Buffer,CurrentCluster); + Fcb->Cluster=CurrentCluster; CurrentCluster = GetNextCluster(DeviceExt, CurrentCluster); } - memcpy(Buffer, Temp, Length); + memcpy(Buffer, Fcb->Buffer, Length); } - ExFreePool(Temp); return(STATUS_SUCCESS); } @@ -1035,7 +1071,6 @@ NTSTATUS FsdWriteFile(PDEVICE_EXTENSION DeviceExt, PVfatFCB Fcb, ULONG CurrentCluster; ULONG FileOffset; ULONG FirstCluster; - PVOID Temp; ULONG TempLength,Length2=Length; CHECKPOINT; @@ -1053,10 +1088,6 @@ NTSTATUS FsdWriteFile(PDEVICE_EXTENSION DeviceExt, PVfatFCB Fcb, else CurrentCluster = Fcb->entry.FirstCluster; FirstCluster=CurrentCluster; - /* Allocate a buffer to hold 1 cluster of data */ - - Temp = ExAllocatePool(NonPagedPool,DeviceExt->BytesPerCluster); - assert(Temp); /* Find the cluster according to the offset in the file */ @@ -1095,26 +1126,29 @@ NTSTATUS FsdWriteFile(PDEVICE_EXTENSION DeviceExt, PVfatFCB Fcb, TempLength = min(Length,DeviceExt->BytesPerCluster - (WriteOffset % DeviceExt->BytesPerCluster)); /* Read in the existing cluster data */ - if (FirstCluster==1) - VFATReadSectors(DeviceExt->StorageDevice,CurrentCluster - ,DeviceExt->Boot->SectorsPerCluster,Temp); - else - VFATLoadCluster(DeviceExt,Temp,CurrentCluster); - + if(CurrentCluster!=Fcb->Cluster) + { + if (FirstCluster==1) + VFATReadSectors(DeviceExt->StorageDevice,CurrentCluster + ,DeviceExt->Boot->SectorsPerCluster,Fcb->Buffer); + else + VFATLoadCluster(DeviceExt,Fcb->Buffer,CurrentCluster); + Fcb->Cluster=CurrentCluster; + } /* Overwrite the last parts of the data as necessary */ - memcpy(Temp + (WriteOffset % DeviceExt->BytesPerCluster), Buffer, + memcpy(Fcb->Buffer + (WriteOffset % DeviceExt->BytesPerCluster), Buffer, TempLength); /* Write the cluster back */ if (FirstCluster==1) { VFATWriteSectors(DeviceExt->StorageDevice,CurrentCluster - ,DeviceExt->Boot->SectorsPerCluster,Temp); + ,DeviceExt->Boot->SectorsPerCluster,Fcb->Buffer); CurrentCluster += DeviceExt->Boot->SectorsPerCluster; } else { - VFATWriteCluster(DeviceExt,Temp,CurrentCluster); + VFATWriteCluster(DeviceExt,Fcb->Buffer,CurrentCluster); CurrentCluster = GetNextCluster(DeviceExt, CurrentCluster); } Length2 -= TempLength; @@ -1129,18 +1163,21 @@ NTSTATUS FsdWriteFile(PDEVICE_EXTENSION DeviceExt, PVfatFCB Fcb, CHECKPOINT; if (CurrentCluster == 0) { - ExFreePool(Temp); return(STATUS_UNSUCCESSFUL); } if (FirstCluster==1) { VFATWriteSectors(DeviceExt->StorageDevice,CurrentCluster ,DeviceExt->Boot->SectorsPerCluster,Buffer); + Fcb->Cluster=CurrentCluster; + memcpy(Fcb->Buffer,Buffer,DeviceExt->Boot->SectorsPerCluster); CurrentCluster += DeviceExt->Boot->SectorsPerCluster; } else { VFATWriteCluster(DeviceExt,Buffer,CurrentCluster); + Fcb->Cluster=CurrentCluster; + memcpy(Fcb->Buffer,Buffer,DeviceExt->Boot->SectorsPerCluster); CurrentCluster = GetNextCluster(DeviceExt, CurrentCluster); } Buffer = Buffer + DeviceExt->BytesPerCluster; @@ -1154,23 +1191,26 @@ NTSTATUS FsdWriteFile(PDEVICE_EXTENSION DeviceExt, PVfatFCB Fcb, { if (CurrentCluster == 0) { - ExFreePool(Temp); return(STATUS_UNSUCCESSFUL); } /* Read in the existing cluster data */ - if (FirstCluster==1) - VFATReadSectors(DeviceExt->StorageDevice,CurrentCluster - ,DeviceExt->Boot->SectorsPerCluster,Temp); - else - VFATLoadCluster(DeviceExt,Temp,CurrentCluster); - memcpy(Temp, Buffer, Length2); + if(CurrentCluster!=Fcb->Cluster) + { + if (FirstCluster==1) + VFATReadSectors(DeviceExt->StorageDevice,CurrentCluster + ,DeviceExt->Boot->SectorsPerCluster,Fcb->Buffer); + else + VFATLoadCluster(DeviceExt,Fcb->Buffer,CurrentCluster); + Fcb->Cluster=CurrentCluster; + } + memcpy(Fcb->Buffer, Buffer, Length2); if (FirstCluster==1) { VFATWriteSectors(DeviceExt->StorageDevice,CurrentCluster - ,DeviceExt->Boot->SectorsPerCluster,Temp); + ,DeviceExt->Boot->SectorsPerCluster,Fcb->Buffer); } else - VFATWriteCluster(DeviceExt,Temp,CurrentCluster); + VFATWriteCluster(DeviceExt,Fcb->Buffer,CurrentCluster); } //FIXME : set last write time and date if(Fcb->entry.FileSizeResource),ExGetCurrentResourceThread()); +DbgPrint("open, Status=%x\n",Status); return Status; } @@ -1345,9 +1385,9 @@ NTSTATUS FsdRead(PDEVICE_OBJECT DeviceObject, PIRP Irp) Length = Stack->Parameters.Read.Length; Buffer = MmGetSystemAddressForMdl(Irp->MdlAddress); Offset = GET_LARGE_INTEGER_LOW_PART(Stack->Parameters.Read.ByteOffset); - assert(FileObject->FsContext2 != NULL); pFcb = ((PVfatCCB)(FileObject->FsContext2))->pFcb; + assert(pFcb); Status = FsdReadFile(DeviceExt,pFcb,Buffer,Length,Offset, &LengthRead); @@ -1512,7 +1552,7 @@ NTSTATUS DriverEntry(PDRIVER_OBJECT _DriverObject, UNICODE_STRING ustr; ANSI_STRING astr; - DbgPrint("VFAT 0.0.6\n"); + DbgPrint("VFAT 0.0.7\n"); pFirstFcb=NULL; VFATDriverObject = _DriverObject;