reactos/rosapps/ramdrv/minix/cache.c

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/*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS kernel
* FILE: services/fs/minix/cache.c
* PURPOSE: Minix FSD
* PROGRAMMER: David Welch (welch@mcmail.com)
* UPDATE HISTORY:
*/
/* INCLUDES *****************************************************************/
#include <ntddk.h>
#include <ntifs.h>
//#define NDEBUG
#include <debug.h>
#include "minix.h"
/* FUNCTIONS ****************************************************************/
NTSTATUS MinixRequestCacheBlock(PDEVICE_OBJECT DeviceObject,
PBCB Bcb,
ULONG FileOffset,
PVOID* BaseAddress,
PCACHE_SEGMENT* CacheSeg)
{
BOOLEAN UptoDate;
CcRosRequestCacheSegment(Bcb,
FileOffset,
BaseAddress,
&UptoDate,
CacheSeg);
if (!UptoDate)
{
MinixReadPage(DeviceObject,
PAGE_ROUND_DOWN(FileOffset),
BaseAddress);
}
BaseAddress = BaseAddress + (FileOffset % PAGE_SIZE);
return(STATUS_SUCCESS);
}