-/*
+/* $Id: iface.c,v 1.59 2001/11/02 22:47:36 hbirr Exp $
+ *
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS kernel
* FILE: services/fs/vfat/iface.c
* PURPOSE: VFAT Filesystem
* PROGRAMMER: Jason Filby (jasonfilby@yahoo.com)
* UPDATE HISTORY:
- ?? Created
- 24-10-1998 Fixed bugs in long filename support
- Fixed a bug that prevented unsuccessful file open requests being reported
- Now works with long filenames that span over a sector boundary
- 28-10-1998 Reads entire FAT into memory
- VFatReadSector modified to read in more than one sector at a time
- 7-11-1998 Fixed bug that assumed that directory data could be fragmented
- 8-12-1998 Added FAT32 support
- Added initial writability functions
- WARNING: DO NOT ATTEMPT TO TEST WRITABILITY FUNCTIONS!!!
- 12-12-1998 Added basic support for FILE_STANDARD_INFORMATION request
-
-*/
+ * ?? Created
+ * 24-10-1998 Fixed bugs in long filename support
+ * Fixed a bug that prevented unsuccessful file open requests
+ * being reported
+ * Now works with long filenames that span over a sector
+ * boundary
+ * 28-10-1998 Reads entire FAT into memory
+ * VFatReadSector modified to read in more than one sector at a
+ * time
+ * 7-11-1998 Fixed bug that assumed that directory data could be
+ * fragmented
+ * 8-12-1998 Added FAT32 support
+ * Added initial writability functions
+ * WARNING: DO NOT ATTEMPT TO TEST WRITABILITY FUNCTIONS!!!
+ * 12-12-1998 Added basic support for FILE_STANDARD_INFORMATION request
+ *
+ */
/* INCLUDES *****************************************************************/
#include <ddk/ntddk.h>
-#include <internal/string.h>
-#include <wstring.h>
-#include <ddk/cctypes.h>
-//#define NDEBUG
-#include <internal/debug.h>
+#define NDEBUG
+#include <debug.h>
#include "vfat.h"
-
/* GLOBALS *****************************************************************/
-static PDRIVER_OBJECT DriverObject;
+#define CACHEPAGESIZE(pDeviceExt) ((pDeviceExt)->BytesPerCluster > PAGESIZE ? \
+ (pDeviceExt)->BytesPerCluster : PAGESIZE)
+
+static PDRIVER_OBJECT VfatDriverObject;
/* FUNCTIONS ****************************************************************/
-ULONG Fat32GetNextCluster(PDEVICE_EXTENSION DeviceExt, ULONG CurrentCluster)
+static NTSTATUS
+VfatHasFileSystem(PDEVICE_OBJECT DeviceToMount,
+ PBOOLEAN RecognizedFS)
/*
- * FUNCTION: Retrieve the next FAT32 cluster from the FAT table via a physical
- * disk read
+ * FUNCTION: Tests if the device contains a filesystem that can be mounted
+ * by this fsd
*/
{
- ULONG FATsector;
- ULONG FATeis;
- PULONG Block;
- Block = ExAllocatePool(NonPagedPool,1024);
- FATsector=CurrentCluster/(512/sizeof(ULONG));
- FATeis=CurrentCluster-(FATsector*(512/sizeof(ULONG)));
- VFATReadSectors(DeviceExt->StorageDevice
- ,(ULONG)(DeviceExt->FATStart+FATsector), 1,(UCHAR*) Block);
- CurrentCluster = Block[FATeis];
- if (CurrentCluster >= 0xffffff8 && CurrentCluster <= 0xfffffff)
- CurrentCluster = 0;
- ExFreePool(Block);
- return(CurrentCluster);
-}
+ BootSector *Boot;
+ NTSTATUS Status;
-ULONG Fat16GetNextCluster(PDEVICE_EXTENSION DeviceExt, ULONG CurrentCluster)
-/*
- * FUNCTION: Retrieve the next FAT16 cluster from the FAT table from the
- * in-memory FAT
- */
-{
- ULONG FATsector;
- ULONG FATeis;
- PUSHORT Block;
- Block = ExAllocatePool(NonPagedPool,BLOCKSIZE);
- FATsector=CurrentCluster/(512/sizeof(USHORT));
- FATeis=CurrentCluster-(FATsector*256);
- memcpy(Block,DeviceExt->FAT+FATsector*BLOCKSIZE, BLOCKSIZE);
- CurrentCluster = Block[FATeis];
- if (CurrentCluster >= 0xfff8 && CurrentCluster <= 0xffff)
- CurrentCluster = 0;
- ExFreePool(Block);
- DPRINT("Returning %x\n",CurrentCluster);
- return(CurrentCluster);
-}
+ Boot = ExAllocatePool(NonPagedPool, 512);
-ULONG Fat12GetNextCluster(PDEVICE_EXTENSION DeviceExt, ULONG CurrentCluster)
-/*
- * FUNCTION: Retrieve the next FAT12 cluster from the FAT table from the
- * in-memory FAT
- */
-{
- unsigned char* CBlock;
- ULONG FATsector;
- ULONG FATOffset;
- ULONG Entry;
- CBlock = ExAllocatePool(NonPagedPool,1024);
- FATsector = (CurrentCluster * 12) / (512 * 8);
- memcpy(CBlock,DeviceExt->FAT+FATsector*BLOCKSIZE, BLOCKSIZE);
- FATOffset = (CurrentCluster * 12) % (512 * 8);
- DPRINT("FATSector %d FATOffset %d\n",FATsector,FATOffset);
- if ((CurrentCluster % 2) == 0)
- {
- Entry = CBlock[((FATOffset / 24)*3)];
- Entry |= (CBlock[((FATOffset / 24)*3) + 1] & 0xf);
- }
- else
+ Status = VfatReadSectors(DeviceToMount, 0, 1, (UCHAR *) Boot);
+ if (!NT_SUCCESS(Status))
{
- Entry = (CBlock[((FATOffset / 24)*3) + 1] >> 4);
- Entry |= (CBlock[((FATOffset / 24)*3) + 2] << 4);
+ return(Status);
}
- DPRINT("Entry %x\n",Entry);
- if (Entry >= 0xff8 && Entry <= 0xfff)
- Entry = 0;
- CurrentCluster = Entry;
- ExFreePool(CBlock);
- DPRINT("Returning %x\n",CurrentCluster);
- return(CurrentCluster);
-}
-ULONG GetNextCluster(PDEVICE_EXTENSION DeviceExt, ULONG CurrentCluster)
-/*
- * FUNCTION: Retrieve the next cluster depending on the FAT type
- */
-{
-
- DPRINT("GetNextCluster(DeviceExt %x, CurrentCluster %x)\n",
- DeviceExt,CurrentCluster);
- if (DeviceExt->FatType == FAT16)
- {
- return(Fat16GetNextCluster(DeviceExt, CurrentCluster));
- }
- else if (DeviceExt->FatType == FAT32)
+ DPRINT1("Boot->SysType %.5s\n", Boot->SysType);
+ if (strncmp(Boot->SysType, "FAT12", 5) == 0 ||
+ strncmp(Boot->SysType, "FAT16", 5) == 0 ||
+ strncmp(((struct _BootSector32 *) (Boot))->SysType, "FAT32", 5) == 0)
{
- return(Fat32GetNextCluster(DeviceExt, CurrentCluster));
+ *RecognizedFS = TRUE;
}
else
{
- return(Fat12GetNextCluster(DeviceExt, CurrentCluster));
- }
-}
-
-ULONG FAT16FindAvailableCluster(PDEVICE_EXTENSION DeviceExt)
-/*
- * FUNCTION: Finds the first available cluster in a FAT16 table
- */
-{
- ULONG sector;
- PUSHORT Block;
- int i;
-
- sector = 0;
- Block = ExAllocatePool(NonPagedPool,BLOCKSIZE);
-
- while(sector<DeviceExt->Boot->FATSectors) {
- memcpy(Block, DeviceExt->FAT+sector*BLOCKSIZE, BLOCKSIZE);
-
- for(i=0; i<512; i++) {
- if(Block[i]==0) {
- ExFreePool(Block);
- return i;
- }
- }
-
- sector++;
- }
-
- /* Give an error message (out of disk space) if we reach here) */
-
- ExFreePool(Block);
- return 0;
-}
-
-void FAT16WriteCluster(PDEVICE_EXTENSION DeviceExt, ULONG ClusterToWrite,
- ULONG NewValue)
-/*
- * FUNCTION: Writes a cluster to the FAT16 physical and in-memory tables
- */
-{
- ULONG FATsector;
- ULONG FATeis;
- PUSHORT Block;
-
- Block = ExAllocatePool(NonPagedPool,BLOCKSIZE);
-
- FATsector=ClusterToWrite/(512/sizeof(USHORT));
- FATeis=ClusterToWrite-(FATsector*256);
-
- /* Update the in-memory FAT */
- memcpy(Block, DeviceExt->FAT+FATsector*BLOCKSIZE, BLOCKSIZE);
- Block[FATeis] = NewValue;
- memcpy(DeviceExt->FAT+FATsector*BLOCKSIZE, Block, BLOCKSIZE);
-
- /* Write the changed FAT sector to disk */
- VFATWriteSectors(DeviceExt->StorageDevice,
- DeviceExt->FATStart+FATsector,
- DeviceExt->Boot->SectorsPerCluster,
- (UCHAR *)Block);
-
- ExFreePool(Block);
-}
-
-void WriteCluster(PDEVICE_EXTENSION DeviceExt, ULONG ClusterToWrite,
- ULONG NewValue)
-/*
- * FUNCTION: Write a changed FAT entry
- */
-{
- if (DeviceExt->FatType == FAT16) {
- FAT16WriteCluster(DeviceExt, ClusterToWrite, NewValue);
- }
-}
-
-ULONG GetNextWriteCluster(PDEVICE_EXTENSION DeviceExt, ULONG CurrentCluster)
-/*
- * FUNCTION: Determines the next cluster to be written
- */
-{
- ULONG LastCluster, NewCluster;
- BOOLEAN EOF = FALSE;
-
- DPRINT("GetNextWriteCluster(DeviceExt %x, CurrentCluster %x)\n",
- DeviceExt,CurrentCluster);
-
- /* Find out what was happening in the last cluster's AU */
-
- if (DeviceExt->FatType == FAT16)
- {
- LastCluster = Fat16GetNextCluster(DeviceExt, CurrentCluster);
- if(LastCluster == 0xFFFF) {
- EOF = TRUE;
- }
- }
- else
- {
- LastCluster = Fat12GetNextCluster(DeviceExt, CurrentCluster);
- if(LastCluster == 0xFFF) {
- EOF = TRUE;
- }
- }
-
- /* Check to see if we must append or overwrite */
-
- if (EOF == TRUE) {
-
- /* Append */
-
- /* Firstly, find the next available open allocation unit */
- NewCluster = FAT16FindAvailableCluster(DeviceExt);
-
- /* Mark the new AU as the EOF */
- if(DeviceExt->FatType == FAT16) {
- FAT16WriteCluster(DeviceExt, NewCluster, 0xFFFF);
- } else {
-//FIXME FAT12WriteCluster(DeviceExt, NewCluster, 0xFFF);
- }
-
- /* Now, write the AU of the LastCluster with the value of the newly
- found AU */
- WriteCluster(DeviceExt, LastCluster, NewCluster);
-
- /* Return NewCluster as CurrentCluster */
- return NewCluster;
-
- } else {
-
- /* Overwrite: Return LastCluster as CurrentCluster */
- return LastCluster;
-
- }
-}
-
-ULONG ClusterToSector(PDEVICE_EXTENSION DeviceExt,
- unsigned long Cluster)
-/*
- * FUNCTION: Converts the cluster number to a sector number for this physical
- * device
- */
-{
- return DeviceExt->dataStart+((Cluster-2)*DeviceExt->Boot->SectorsPerCluster);
-}
-
-void RtlAnsiToUnicode(PWSTR Dest, PCH Source, ULONG Length)
-/*
- * FUNCTION: Convert an ANSI string to it's Unicode equivalent
- */
-{
- int i;
-
- for (i=0; (i<Length && Source[i] != ' '); i++)
- {
- Dest[i] = Source[i];
+ *RecognizedFS = FALSE;
}
- Dest[i]=0;
-}
-
-void RtlCatAnsiToUnicode(PWSTR Dest, PCH Source, ULONG Length)
-/*
- * FUNCTION: Appends a converted ANSI to Unicode string to the end of an
- * existing Unicode string
- */
-{
- ULONG i;
-
- while((*Dest)!=0)
- {
- Dest++;
- }
- for (i=0; (i<Length && Source[i] != ' '); i++)
- {
- Dest[i] = Source[i];
- }
- Dest[i]=0;
-}
-
-void vfat_initstr(wchar_t *wstr, ULONG wsize)
-/*
- * FUNCTION: Initialize a string for use with a long file name
- */
-{
- int i;
- wchar_t nc=0;
- for(i=0; i<wsize; i++)
- {
- *wstr=nc;
- wstr++;
- }
- wstr=wstr-wsize;
-}
-
-wchar_t * vfat_wcsncat(wchar_t * dest, const wchar_t * src,size_t wstart, size_t wcount)
-/*
- * FUNCTION: Append a string for use with a long file name
- */
-{
- int i;
-
- dest+=wstart;
- for(i=0; i<wcount; i++)
- {
- *dest=src[i];
- dest++;
- }
- dest=dest-(wcount+wstart);
-
- return dest;
-}
-
-wchar_t * vfat_wcsncpy(wchar_t * dest, const wchar_t *src,size_t wcount)
-/*
- * FUNCTION: Copy a string for use with long file names
- */
-{
- int i;
-
- for (i=0;i<wcount;i++)
- {
- *dest=src[i];
- dest++;
- }
- dest=dest-wcount;
- return(dest);
-}
-
-wchar_t * vfat_movstr(wchar_t * dest, const wchar_t *src, ULONG dpos,
- ULONG spos, ULONG len)
-/*
- * FUNCTION: Move the characters in a string to a new position in the same
- * string
- */
-{
- int i;
-
- dest+=dpos;
- for(i=spos; i<spos+len; i++)
- {
- *dest=src[i];
- dest++;
- }
- dest-=(dpos+len);
-
- return(dest);
-}
-
-BOOLEAN IsLastEntry(PVOID Block, ULONG Offset)
-/*
- * FUNCTION: Determine if the given directory entry is the last
- */
-{
- return(((FATDirEntry *)Block)[Offset].Filename[0] == 0);
-}
-
-BOOLEAN IsDeletedEntry(PVOID Block, ULONG Offset)
-/*
- * FUNCTION: Determines if the given entry is a deleted one
- */
-{
- /* Checks special character (short names) or attrib=0 (long names) */
+ ExFreePool(Boot);
- return ((((FATDirEntry *)Block)[Offset].Filename[0] == 0xe5) ||
- (((FATDirEntry *)Block)[Offset].Attrib == 0x00));
+ return(STATUS_SUCCESS);
}
-BOOLEAN GetEntryName(PVOID Block, PULONG _Offset, PWSTR Name, PULONG _jloop,
- PDEVICE_EXTENSION DeviceExt, ULONG * _StartingSector)
-/*
- * FUNCTION: Retrieves the file name, be it in short or long file name format
- */
-{
- FATDirEntry* test;
- slot* test2;
- ULONG Offset = *_Offset;
- ULONG StartingSector = *_StartingSector;
- ULONG jloop = *_jloop;
- ULONG cpos;
- WCHAR tmp[256];
-
- test = (FATDirEntry *)Block;
- test2 = (slot *)Block;
-
- *Name = 0;
-
- if (IsDeletedEntry(Block,Offset))
- {
- return(FALSE);
- }
-
- if(test2[Offset].attr == 0x0f)
- {
- vfat_initstr(Name, 256);
- vfat_wcsncpy(Name,test2[Offset].name0_4,5);
- vfat_wcsncat(Name,test2[Offset].name5_10,5,6);
- vfat_wcsncat(Name,test2[Offset].name11_12,11,2);
-
- cpos=0;
- while((test2[Offset].id!=0x41) && (test2[Offset].id!=0x01) &&
- (test2[Offset].attr>0))
- {
- Offset++;
- if(Offset==ENTRIES_PER_SECTOR) {
- Offset=0;
- StartingSector++;
- jloop++;
- VFATReadSectors(DeviceExt->StorageDevice,StartingSector,1,Block);
- test2 = (slot *)Block;
- }
- cpos++;
-
- vfat_initstr(tmp, 256);
- vfat_movstr(tmp, Name, 13, 0, cpos*13);
- vfat_wcsncpy(Name, tmp, 256);
- vfat_wcsncpy(Name, test2[Offset].name0_4, 5);
- vfat_wcsncat(Name,test2[Offset].name5_10,5,6);
- vfat_wcsncat(Name,test2[Offset].name11_12,11,2);
-
- }
-
- if (IsDeletedEntry(Block,Offset+1))
- {
- Offset++;
- *_Offset = Offset;
- *_jloop = jloop;
- *_StartingSector = StartingSector;
- return(FALSE);
- }
-
- *_Offset = Offset;
- *_jloop = jloop;
- *_StartingSector = StartingSector;
-
- return(TRUE);
- }
-
- RtlAnsiToUnicode(Name,test[Offset].Filename,8);
- if (test[Offset].Ext[0]!=' ')
- {
- RtlCatAnsiToUnicode(Name,".",1);
- }
- RtlCatAnsiToUnicode(Name,test[Offset].Ext,3);
-
- *_Offset = Offset;
-
- return(TRUE);
-}
-BOOLEAN wstrcmpi(PWSTR s1, PWSTR s2)
+static NTSTATUS
+VfatMountDevice(PDEVICE_EXTENSION DeviceExt,
+ PDEVICE_OBJECT DeviceToMount)
/*
- * FUNCTION: Compare to wide character strings
- * return TRUE if s1==s2
- */
-{
- while (wtolower(*s1)==wtolower(*s2))
- {
- if ((*s1)==0 && (*s2)==0)
- {
- return(TRUE);
- }
-
- s1++;
- s2++;
- }
- return(FALSE);
-}
-BOOLEAN wstrcmpjoki(PWSTR s1, PWSTR s2)
-/*
- * FUNCTION: Compare to wide character strings, s2 with jokers (* or ?)
- * return TRUE if s1 like s2
+ * FUNCTION: Mounts the device
*/
{
- while ((*s2=='?')||(wtolower(*s1)==wtolower(*s2)))
- {
- if ((*s1)==0 && (*s2)==0)
- return(TRUE);
- s1++;
- s2++;
- }
- if(*s2=='*')
- {
- s2++;
- while (*s1)
- if (wstrcmpjoki(s1,s2)) return TRUE;
- else s1++;
- }
- if ((*s1)==0 && (*s2)==0)
- return(TRUE);
- return(FALSE);
-}
+ NTSTATUS Status;
-NTSTATUS FindFile(PDEVICE_EXTENSION DeviceExt, PFCB Fcb,
- PFCB Parent, PWSTR FileToFind,ULONG *StartSector,ULONG *Entry)
-/*
- * FUNCTION: Find a file
- */
-{
- ULONG i, j;
- ULONG Size;
- char* block;
- WCHAR name[256];
- ULONG StartingSector;
- ULONG NextCluster;
- DPRINT("FindFile(Parent %x, FileToFind %w)\n",Parent,FileToFind);
-
- if (Parent == NULL)
- {
- Size = DeviceExt->rootDirectorySectors;//FIXME : in fat32, no limit
- StartingSector = DeviceExt->rootStart;
- if(FileToFind[0]==0 ||(FileToFind[0]=='\\' && FileToFind[1]==0))
- {// it's root !
- memset(Fcb,0,sizeof(FCB));
- memset(Fcb->entry.Filename,' ',11);
- if (DeviceExt->FatType == FAT32)
- Fcb->entry.FirstCluster=2;
- else Fcb->entry.FirstCluster=1;
- if(StartSector) *StartSector=StartingSector;
- if(Entry) *Entry=0;
- return(STATUS_SUCCESS);
- }
- }
- else
- {
- DPRINT("Parent->entry.FileSize %x\n",Parent->entry.FileSize);
-
- Size = ULONG_MAX;
- if (DeviceExt->FatType == FAT32)
- NextCluster = Parent->entry.FirstCluster+Parent->entry.FirstClusterHigh*65536;
- else
- NextCluster = Parent->entry.FirstCluster;
- StartingSector = ClusterToSector(DeviceExt, NextCluster);
- }
- block = ExAllocatePool(NonPagedPool,BLOCKSIZE);
- if (StartSector && (*StartSector)) StartingSector=*StartSector;
- i=(Entry)?(*Entry):0;
- DPRINT("FindFile : start at sector %lx, entry %ld\n",StartingSector,i);
- for (j=0; j<Size; j++)
- {
- VFATReadSectors(DeviceExt->StorageDevice,StartingSector,1,block);
-
- for (i=(Entry)?(*Entry):0; i<ENTRIES_PER_SECTOR; i++)
- {
- if (IsLastEntry((PVOID)block,i))
- {
- ExFreePool(block);
- return(STATUS_UNSUCCESSFUL);
- }
- if (GetEntryName((PVOID)block,&i,name,&j,DeviceExt,&StartingSector))
- {
-// DPRINT("Comparing %w %w\n",name,FileToFind);
- if (wstrcmpjoki(name,FileToFind))
- {
- /* In the case of a long filename, the firstcluster is stored in
- the next record -- where it's short name is */
- if(((FATDirEntry *)block)[i].Attrib==0x0f) i++;
-// if(DeviceExt->FatType==FAT32)
-// {
-// if(((FATDirEntry *)block)[i].FirstCluster==0
-// &&((FATDirEntry *)block)[i].FirstClusterHigh==0
-// ) i++;
-// }
-// else
-// if(((FATDirEntry *)block)[i].FirstCluster==0) i++;
- if( i==(ENTRIES_PER_SECTOR))
- {// entry is in next sector
- StartingSector++;
- VFATReadSectors(DeviceExt->StorageDevice,StartingSector,1,block);
- i=0;
- }
- memcpy(&Fcb->entry,&((FATDirEntry *)block)[i],
- sizeof(FATDirEntry));
- vfat_wcsncpy(Fcb->ObjectName,name,251);
- ExFreePool(block);
- if(StartSector) *StartSector=StartingSector;
- if(Entry) *Entry=i;
- return(STATUS_SUCCESS);
- }
- }
- }
- if(Entry) *Entry=0;
- // not found in this sector, try next :
+ DPRINT("Mounting VFAT device...");
+ DPRINT("DeviceExt %x\n", DeviceExt);
- /* It seems that directory sectors cannot be fragmented and therefore,
- they only have a first cluster, but the one's after it are marked
- with 0xffff. This theory is still not 100% certain, so the following
- lines are commented and not removed */
+ DeviceExt->Boot = ExAllocatePool(NonPagedPool, 512);
- StartingSector++;
- /* if (Parent == NULL)
+ Status = VfatReadSectors(DeviceToMount, 0, 1, (UCHAR *) DeviceExt->Boot);
+ if (!NT_SUCCESS(Status))
{
- StartingSector++;
+ return(Status);
}
- else
- {
- NextCluster = GetNextCluster(DeviceExt,NextCluster);
- if (NextCluster == 0)
- {
- ExFreePool(block);
- return(STATUS_UNSUCCESSFUL);
- }
- StartingSector = ClusterToSector(DeviceExt,NextCluster);
- } */
- }
- ExFreePool(block);
- return(STATUS_UNSUCCESSFUL);
-}
+ DeviceExt->FATStart = DeviceExt->Boot->ReservedSectors;
+ DeviceExt->rootDirectorySectors =
+ (DeviceExt->Boot->RootEntries * 32) / DeviceExt->Boot->BytesPerSector;
+ DeviceExt->rootStart =
+ DeviceExt->FATStart +
+ DeviceExt->Boot->FATCount * DeviceExt->Boot->FATSectors;
+ DeviceExt->dataStart =
+ DeviceExt->rootStart + DeviceExt->rootDirectorySectors;
+ DeviceExt->BytesPerSector = DeviceExt->Boot->BytesPerSector;
+ DeviceExt->FATEntriesPerSector = DeviceExt->Boot->BytesPerSector / 32;
+ DeviceExt->BytesPerCluster = DeviceExt->Boot->SectorsPerCluster *
+ DeviceExt->Boot->BytesPerSector;
-NTSTATUS FsdCloseFile(PDEVICE_EXTENSION DeviceExt, PFILE_OBJECT FileObject)
-/*
- * FUNCTION: Closes a file
- */
-{
- /* NOP */
- return STATUS_SUCCESS;
-}
-
-NTSTATUS FsdOpenFile(PDEVICE_EXTENSION DeviceExt, PFILE_OBJECT FileObject,
- PWSTR FileName)
-/*
- * FUNCTION: Opens a file
- */
-{
- PWSTR current;
- PWSTR next;
- PWSTR string;
- PFCB ParentFcb;
- PFCB Fcb;
- PFCB Temp;
- NTSTATUS Status;
-
- DPRINT("FsdOpenFile(%08lx, %08lx, %08lx)\n",
- DeviceExt,
- FileObject,
- FileName);
-
-CHECKPOINT;
- string = FileName;
-CHECKPOINT;
- ParentFcb = NULL;
-CHECKPOINT;
- Fcb = ExAllocatePool(NonPagedPool, sizeof(FCB));
-CHECKPOINT;
- next = &string[0];
-CHECKPOINT;
- current = next+1;
-
-CHECKPOINT;
- while (next!=NULL)
+ if (DeviceExt->BytesPerCluster >= PAGESIZE &&
+ (DeviceExt->BytesPerCluster % PAGESIZE) != 0)
{
- DPRINT("current %w next %x\n",current,next);
-
- *next = '\\';
- current = next+1;
- next = wcschr(next+1,'\\');
- if (next!=NULL)
- {
- *next=0;
- }
-
-CHECKPOINT;
- Status = FindFile(DeviceExt,Fcb,ParentFcb,current,NULL,NULL);
- if (Status != STATUS_SUCCESS)
- {
- /* FIXME: should the FCB be freed here? */
- return(Status);
- }
- Temp = Fcb;
- if (ParentFcb == NULL)
- {
- Fcb = ExAllocatePool(NonPagedPool,sizeof(FCB));
- }
- else
- {
- Fcb = ParentFcb;
- }
- ParentFcb = Temp;
-CHECKPOINT;
+ DbgPrint("Invalid cluster size\n");
+ KeBugCheck(0);
}
- FileObject->FsContext = ParentFcb;
- DPRINT("file opn, fcb=%x\n",ParentFcb);
- DPRINT("ParentFcb->entry.FileSize %d\n",ParentFcb->entry.FileSize);
-
- return(STATUS_SUCCESS);
-}
-
-BOOLEAN FsdHasFileSystem(PDEVICE_OBJECT DeviceToMount)
-/*
- * FUNCTION: Tests if the device contains a filesystem that can be mounted
- * by this fsd
- */
-{
- BootSector* Boot;
-
- Boot = ExAllocatePool(NonPagedPool,512);
-
- VFATReadSectors(DeviceToMount, 0, 1, (UCHAR *)Boot);
-
- if (strncmp(Boot->SysType,"FAT12",5)==0 ||
- strncmp(Boot->SysType,"FAT16",5)==0 ||
- strncmp(((struct _BootSector32 *)(Boot))->SysType,"FAT32",5)==0)
+ else if (DeviceExt->BytesPerCluster < PAGESIZE &&
+ (PAGESIZE % DeviceExt->BytesPerCluster) != 0)
{
- ExFreePool(Boot);
- return(TRUE);
+ DbgPrint("Invalid cluster size2\n");
+ KeBugCheck(0);
}
- ExFreePool(Boot);
- return(FALSE);
-}
-NTSTATUS FsdMountDevice(PDEVICE_EXTENSION DeviceExt,
- PDEVICE_OBJECT DeviceToMount)
-/*
- * FUNCTION: Mounts the device
- */
-{
- DPRINT("Mounting VFAT device...");
- DPRINT("DeviceExt %x\n",DeviceExt);
-
- DeviceExt->Boot = ExAllocatePool(NonPagedPool,512);
- VFATReadSectors(DeviceToMount, 0, 1, (UCHAR *)DeviceExt->Boot);
-
- DPRINT("DeviceExt->Boot->BytesPerSector %x\n",
- DeviceExt->Boot->BytesPerSector);
-
- DeviceExt->FATStart=DeviceExt->Boot->ReservedSectors;
- DeviceExt->rootDirectorySectors=
- (DeviceExt->Boot->RootEntries*32)/DeviceExt->Boot->BytesPerSector;
- DeviceExt->rootStart=
- DeviceExt->FATStart+DeviceExt->Boot->FATCount*DeviceExt->Boot->FATSectors;
- DeviceExt->dataStart=DeviceExt->rootStart+DeviceExt->rootDirectorySectors;
- DeviceExt->FATEntriesPerSector=DeviceExt->Boot->BytesPerSector/32;
- DeviceExt->BytesPerCluster = DeviceExt->Boot->SectorsPerCluster *
- DeviceExt->Boot->BytesPerSector;
-
- if (strncmp(DeviceExt->Boot->SysType,"FAT12",5)==0)
+ if (strncmp (DeviceExt->Boot->SysType, "FAT12", 5) == 0)
{
+ DbgPrint("FAT12\n");
DeviceExt->FatType = FAT12;
}
- else if (strncmp(((struct _BootSector32 *)(DeviceExt->Boot))->SysType,"FAT32",5)==0)
+ else if (strncmp
+ (((struct _BootSector32 *) (DeviceExt->Boot))->SysType, "FAT32",
+ 5) == 0)
{
- DeviceExt->FatType = FAT32;
- DeviceExt->rootDirectorySectors=DeviceExt->Boot->SectorsPerCluster;
- DeviceExt->rootStart=
- DeviceExt->FATStart+DeviceExt->Boot->FATCount
- * ((struct _BootSector32 *)( DeviceExt->Boot))->FATSectors32;
- DeviceExt->dataStart=DeviceExt->rootStart;
- }
+ DbgPrint("FAT32\n");
+ DeviceExt->FatType = FAT32;
+ DeviceExt->rootDirectorySectors = DeviceExt->Boot->SectorsPerCluster;
+ DeviceExt->dataStart = DeviceExt->FATStart + DeviceExt->Boot->FATCount
+ * ((struct _BootSector32 *) (DeviceExt->Boot))->FATSectors32;
+ DeviceExt->rootStart = ClusterToSector (DeviceExt,
+ ((struct _BootSector32 *)(DeviceExt->Boot))->RootCluster);
+ }
else
{
+ DbgPrint("FAT16\n");
DeviceExt->FatType = FAT16;
}
- // with FAT32 it's not a good idea to load always fat in memory
- // because on a 8GB partition with 2 KO clusters, the fat = 8 MO
- if(DeviceExt->FatType!=FAT32)
- {
- DeviceExt->FAT = ExAllocatePool(NonPagedPool, BLOCKSIZE*DeviceExt->Boot->FATSectors);
- VFATReadSectors(DeviceToMount, DeviceExt->FATStart, DeviceExt->Boot->FATSectors, (UCHAR *)DeviceExt->FAT);
- }
- return STATUS_SUCCESS;
-}
-
-void VFATLoadCluster(PDEVICE_EXTENSION DeviceExt, PVOID Buffer, ULONG Cluster)
-/*
- * FUNCTION: Load a cluster from the physical device
- */
-{
- ULONG Sector;
-
- DPRINT("VFATLoadCluster(DeviceExt %x, Buffer %x, Cluster %d)\n",
- DeviceExt,Buffer,Cluster);
-
- Sector = ClusterToSector(DeviceExt, Cluster);
-
- VFATReadSectors(DeviceExt->StorageDevice,
- Sector,
- DeviceExt->Boot->SectorsPerCluster,
- Buffer);
-}
-
-void VFATWriteCluster(PDEVICE_EXTENSION DeviceExt, PVOID Buffer, ULONG Cluster)
-/*
- * FUNCTION: Write a cluster to the physical device
- */
-{
- ULONG Sector;
-
- DPRINT("VFATWriteCluster(DeviceExt %x, Buffer %x, Cluster %d)\n",
- DeviceExt,Buffer,Cluster);
-
- Sector = ClusterToSector(DeviceExt, Cluster);
-
- VFATWriteSectors(DeviceExt->StorageDevice,
- Sector,
- DeviceExt->Boot->SectorsPerCluster,
- Buffer);
-}
-
-NTSTATUS FsdReadFile(PDEVICE_EXTENSION DeviceExt, PFILE_OBJECT FileObject,
- PVOID Buffer, ULONG Length, ULONG ReadOffset,
- PULONG LengthRead)
-/*
- * FUNCTION: Reads data from a file
- */
-{
- ULONG CurrentCluster;
- ULONG FileOffset;
- ULONG FirstCluster;
- PFCB Fcb;
- PVOID Temp;
- ULONG TempLength;
-
- DPRINT("FsdReadFile(DeviceExt %x, FileObject %x, Buffer %x, "
- "Length %d, ReadOffset %d)\n",DeviceExt,FileObject,Buffer,
- Length,ReadOffset);
-
- FirstCluster = ReadOffset / DeviceExt->BytesPerCluster;
- Fcb = FileObject->FsContext;
- if (DeviceExt->FatType == FAT32)
- CurrentCluster = Fcb->entry.FirstCluster+Fcb->entry.FirstClusterHigh*65536;
- else
- CurrentCluster = Fcb->entry.FirstCluster;
- if (CurrentCluster<2)
- return STATUS_UNSUCCESSFUL;// FIXME : root of FAT16 ?
- DPRINT("DeviceExt->BytesPerCluster %x\n",DeviceExt->BytesPerCluster);
-
- if (ReadOffset >= Fcb->entry.FileSize)
- {
- return(STATUS_END_OF_FILE);
- }
- if ((ReadOffset + Length) > Fcb->entry.FileSize)
- {
- Length = Fcb->entry.FileSize - ReadOffset;
- }
- *LengthRead = 0;
- Temp = ExAllocatePool(NonPagedPool,DeviceExt->BytesPerCluster);
- for (FileOffset=0; FileOffset < FirstCluster; FileOffset++)
- {
- CurrentCluster = GetNextCluster(DeviceExt,CurrentCluster);
- }
- CHECKPOINT;
- if ((ReadOffset % DeviceExt->BytesPerCluster)!=0)
- {
- VFATLoadCluster(DeviceExt,Temp,CurrentCluster);
- CurrentCluster = GetNextCluster(DeviceExt, CurrentCluster);
-
- TempLength = min(Length,DeviceExt->BytesPerCluster -
- (ReadOffset % DeviceExt->BytesPerCluster));
-
- memcpy(Buffer, Temp + ReadOffset % DeviceExt->BytesPerCluster,
- TempLength);
-
- (*LengthRead) = (*LengthRead) + TempLength;
- Length = Length - TempLength;
- Buffer = Buffer + TempLength;
- }
- CHECKPOINT;
- while (Length > DeviceExt->BytesPerCluster)
- {
- VFATLoadCluster(DeviceExt, Buffer, CurrentCluster);
- CurrentCluster = GetNextCluster(DeviceExt, CurrentCluster);
-
- if (CurrentCluster == 0)
- {
- ExFreePool(Temp);
- return(STATUS_SUCCESS);
- }
-
- (*LengthRead) = (*LengthRead) + DeviceExt->BytesPerCluster;
- Buffer = Buffer + DeviceExt->BytesPerCluster;
- Length = Length - DeviceExt->BytesPerCluster;
- }
- CHECKPOINT;
- if (Length > 0)
- {
- (*LengthRead) = (*LengthRead) + Length;
- VFATLoadCluster(DeviceExt, Temp, CurrentCluster);
- memcpy(Buffer, Temp, Length);
- }
- ExFreePool(Temp);
return(STATUS_SUCCESS);
}
-NTSTATUS FsdWriteFile(PDEVICE_EXTENSION DeviceExt, PFILE_OBJECT FileObject,
- PVOID Buffer, ULONG Length, ULONG WriteOffset)
+
+static NTSTATUS
+VfatMount (PVFAT_IRP_CONTEXT IrpContext)
/*
- * FUNCTION: Writes data to file
+ * FUNCTION: Mount the filesystem
*/
{
- ULONG CurrentCluster;
- ULONG FileOffset;
- ULONG FirstCluster;
- PFCB Fcb;
- PVOID Temp;
- ULONG TempLength;
-
- /* Locate the first cluster of the file */
-
- FirstCluster = WriteOffset / DeviceExt->BytesPerCluster;
- Fcb = FileObject->FsContext;
- if (DeviceExt->FatType == FAT32)
- CurrentCluster = Fcb->entry.FirstCluster+Fcb->entry.FirstClusterHigh*65536;
- else
- CurrentCluster = Fcb->entry.FirstCluster;
+ PDEVICE_OBJECT DeviceObject = NULL;
+ PDEVICE_EXTENSION DeviceExt = NULL;
+ BOOLEAN RecognizedFS;
+ NTSTATUS Status;
+ PVFATFCB Fcb = NULL;
+ PVFATCCB Ccb = NULL;
- /* Allocate a buffer to hold 1 cluster of data */
+ DPRINT1("VfatMount(IrpContext %x)\n", IrpContext);
- Temp = ExAllocatePool(NonPagedPool,DeviceExt->BytesPerCluster);
+ assert (IrpContext);
- /* Find the cluster according to the offset in the file */
+ if (IrpContext->DeviceObject != VfatDriverObject->DeviceObject)
+ {
+ // Only allowed on the main device object
+ Status = STATUS_INVALID_DEVICE_REQUEST;
+ goto ByeBye;
+ }
- for (FileOffset=0; FileOffset < FirstCluster; FileOffset++)
- {
- CurrentCluster = GetNextCluster(DeviceExt,CurrentCluster);
- }
- CHECKPOINT;
+ Status = VfatHasFileSystem (IrpContext->Stack->Parameters.Mount.DeviceObject, &RecognizedFS);
+ if (!NT_SUCCESS(Status))
+ {
+ goto ByeBye;
+ }
- /*
- If the offset in the cluster doesn't fall on the cluster boundary then
- we have to write only from the specified offset
- */
+ if (RecognizedFS == FALSE)
+ {
+ DPRINT("VFAT: Unrecognized Volume\n");
+ Status = STATUS_UNRECOGNIZED_VOLUME;
+ goto ByeBye;
+ }
- if ((WriteOffset % DeviceExt->BytesPerCluster)!=0)
- {
- TempLength = min(Length,DeviceExt->BytesPerCluster -
- (WriteOffset % DeviceExt->BytesPerCluster));
+ DPRINT("VFAT: Recognized volume\n");
- /* Read in the existing cluster data */
- VFATLoadCluster(DeviceExt,Temp,CurrentCluster);
+ Status = IoCreateDevice(VfatDriverObject,
+ sizeof (DEVICE_EXTENSION),
+ NULL,
+ FILE_DEVICE_FILE_SYSTEM,
+ 0,
+ FALSE,
+ &DeviceObject);
+ if (!NT_SUCCESS(Status))
+ {
+ goto ByeBye;
+ }
- /* Overwrite the last parts of the data as necessary */
- memcpy(Temp + WriteOffset % DeviceExt->BytesPerCluster, Buffer,
- TempLength);
+ DeviceObject->Flags = DeviceObject->Flags | DO_DIRECT_IO;
+ DeviceExt = (PVOID) DeviceObject->DeviceExtension;
+ RtlZeroMemory(DeviceExt, sizeof(DEVICE_EXTENSION));
- /* Write the cluster back */
- VFATWriteCluster(DeviceExt,Temp,CurrentCluster);
+ /* use same vpb as device disk */
+ DeviceObject->Vpb = IrpContext->Stack->Parameters.Mount.DeviceObject->Vpb;
+ Status = VfatMountDevice(DeviceExt, IrpContext->Stack->Parameters.Mount.DeviceObject);
+ if (!NT_SUCCESS(Status))
+ {
+ /* FIXME: delete device object */
+ goto ByeBye;
+ }
- /* Next write cluster */
- CurrentCluster = GetNextWriteCluster(DeviceExt, CurrentCluster);
+#if 1
+ DbgPrint("BytesPerSector: %d\n", DeviceExt->Boot->BytesPerSector);
+ DbgPrint("SectorsPerCluster: %d\n", DeviceExt->Boot->SectorsPerCluster);
+ DbgPrint("ReservedSectors: %d\n", DeviceExt->Boot->ReservedSectors);
+ DbgPrint("FATCount: %d\n", DeviceExt->Boot->FATCount);
+ DbgPrint("RootEntries: %d\n", DeviceExt->Boot->RootEntries);
+ DbgPrint("Sectors: %d\n", DeviceExt->Boot->Sectors);
+ DbgPrint("FATSectors: %d\n", DeviceExt->Boot->FATSectors);
+ DbgPrint("SectorsPerTrack: %d\n", DeviceExt->Boot->SectorsPerTrack);
+ DbgPrint("Heads: %d\n", DeviceExt->Boot->Heads);
+ DbgPrint("HiddenSectors: %d\n", DeviceExt->Boot->HiddenSectors);
+ DbgPrint("SectorsHuge: %d\n", DeviceExt->Boot->SectorsHuge);
+ DbgPrint("RootStart: %d\n", DeviceExt->rootStart);
+ DbgPrint("DataStart: %d\n", DeviceExt->dataStart);
+ if (DeviceExt->FatType == FAT32)
+ {
+ DbgPrint("FATSectors32: %d\n",
+ ((struct _BootSector32*)(DeviceExt->Boot))->FATSectors32);
+ DbgPrint("RootCluster: %d\n",
+ ((struct _BootSector32*)(DeviceExt->Boot))->RootCluster);
+ DbgPrint("FSInfoSector: %d\n",
+ ((struct _BootSector32*)(DeviceExt->Boot))->FSInfoSector);
+ DbgPrint("BootBackup: %d\n",
+ ((struct _BootSector32*)(DeviceExt->Boot))->BootBackup);
+ }
+#endif
+ DeviceObject->Vpb->Flags |= VPB_MOUNTED;
+ DeviceExt->StorageDevice = IoAttachDeviceToDeviceStack(DeviceObject, IrpContext->Stack->Parameters.Mount.DeviceObject);
+
+ DeviceExt->FATFileObject = IoCreateStreamFileObject(NULL, DeviceExt->StorageDevice);
+ Fcb = vfatNewFCB(NULL);
+ if (Fcb == NULL)
+ {
+ Status = STATUS_INSUFFICIENT_RESOURCES;
+ goto ByeBye;
+ }
+ Ccb = ExAllocatePoolWithTag (NonPagedPool, sizeof (VFATCCB), TAG_CCB);
+ if (Ccb == NULL)
+ {
+ Status = STATUS_INSUFFICIENT_RESOURCES;
+ goto ByeBye;
+ }
+ memset(Ccb, 0, sizeof (VFATCCB));
+ DeviceExt->FATFileObject->Flags = DeviceExt->FATFileObject->Flags | FO_FCB_IS_VALID | FO_DIRECT_CACHE_PAGING_READ;
+ DeviceExt->FATFileObject->FsContext = (PVOID) &Fcb->RFCB;
+ DeviceExt->FATFileObject->FsContext2 = Ccb;
+ DeviceExt->FATFileObject->SectionObjectPointers = &Fcb->SectionObjectPointers;
+ Ccb->pFcb = Fcb;
+ Ccb->PtrFileObject = DeviceExt->FATFileObject;
+ Fcb->FileObject = DeviceExt->FATFileObject;
+ Fcb->pDevExt = (PDEVICE_EXTENSION)DeviceExt->StorageDevice;
+
+ Fcb->Flags = FCB_IS_FAT;
+
+ if (DeviceExt->Boot->Sectors != 0)
+ {
+ DeviceExt->NumberOfClusters = (DeviceExt->Boot->Sectors - DeviceExt->dataStart)
+ / DeviceExt->Boot->SectorsPerCluster + 2;
+ }
+ else
+ {
+ DeviceExt->NumberOfClusters = (DeviceExt->Boot->SectorsHuge - DeviceExt->dataStart)
+ / DeviceExt->Boot->SectorsPerCluster + 2;
+ }
+ if (DeviceExt->FatType == FAT32)
+ {
+ Fcb->RFCB.FileSize.QuadPart = ((struct _BootSector32 *)DeviceExt->Boot)->FATSectors32 * BLOCKSIZE;
+ Fcb->RFCB.ValidDataLength.QuadPart = ((struct _BootSector32 *)DeviceExt->Boot)->FATSectors32 * BLOCKSIZE;
+ Fcb->RFCB.AllocationSize.QuadPart = ROUND_UP(((struct _BootSector32 *)DeviceExt->Boot)->FATSectors32 * BLOCKSIZE, CACHEPAGESIZE(DeviceExt));
+ Status = CcRosInitializeFileCache(DeviceExt->FATFileObject, &Fcb->RFCB.Bcb, CACHEPAGESIZE(DeviceExt));
+ }
+ else
+ {
+ if (DeviceExt->FatType == FAT16)
+ {
+ Fcb->RFCB.FileSize.QuadPart = DeviceExt->Boot->FATSectors * BLOCKSIZE;
+ Fcb->RFCB.ValidDataLength.QuadPart = DeviceExt->Boot->FATSectors * BLOCKSIZE;
+ Fcb->RFCB.AllocationSize.QuadPart = ROUND_UP(DeviceExt->Boot->FATSectors * BLOCKSIZE, CACHEPAGESIZE(DeviceExt));
+ Status = CcRosInitializeFileCache(DeviceExt->FATFileObject, &Fcb->RFCB.Bcb, CACHEPAGESIZE(DeviceExt));
+ }
+ else
+ {
+ Fcb->RFCB.FileSize.QuadPart = DeviceExt->Boot->FATSectors * BLOCKSIZE;
+ Fcb->RFCB.ValidDataLength.QuadPart = DeviceExt->Boot->FATSectors * BLOCKSIZE;
+ Fcb->RFCB.AllocationSize.QuadPart = 2 * PAGESIZE;
+ Status = CcRosInitializeFileCache(DeviceExt->FATFileObject, &Fcb->RFCB.Bcb, 2 * PAGESIZE);
+ }
+ }
+ if (!NT_SUCCESS (Status))
+ {
+ DbgPrint ("CcRosInitializeFileCache failed\n");
+ goto ByeBye;
+ }
- Length = Length - TempLength;
- Buffer = Buffer + TempLength;
- }
- CHECKPOINT;
+ DeviceExt->LastAvailableCluster = 0;
+ ExInitializeResourceLite(&DeviceExt->DirResource);
+ ExInitializeResourceLite(&DeviceExt->FatResource);
- /* Write the buffer in chunks of 1 cluster */
+ KeInitializeSpinLock(&DeviceExt->FcbListLock);
+ InitializeListHead(&DeviceExt->FcbListHead);
- while (Length > DeviceExt->BytesPerCluster)
- {
- VFATWriteCluster(DeviceExt, Buffer, CurrentCluster);
- CurrentCluster = GetNextWriteCluster(DeviceExt, CurrentCluster);
-
- if (CurrentCluster == 0)
- {
- ExFreePool(Temp);
- return(STATUS_SUCCESS);
- }
-
- Buffer = Buffer + DeviceExt->BytesPerCluster;
- Length = Length - DeviceExt->BytesPerCluster;
- }
- CHECKPOINT;
+ /* read serial number */
+ if (DeviceExt->FatType == FAT12 || DeviceExt->FatType == FAT16)
+ DeviceObject->Vpb->SerialNumber =
+ ((struct _BootSector *) (DeviceExt->Boot))->VolumeID;
+ else if (DeviceExt->FatType == FAT32)
+ DeviceObject->Vpb->SerialNumber =
+ ((struct _BootSector32 *) (DeviceExt->Boot))->VolumeID;
- /* Write the remainder */
+ /* read volume label */
+ ReadVolumeLabel(DeviceExt, DeviceObject->Vpb);
+ Status = STATUS_SUCCESS;
- if (Length > 0)
- {
- memcpy(Temp, Buffer, Length);
- VFATWriteCluster(DeviceExt, Temp, CurrentCluster);
- }
+ByeBye:
- ExFreePool(Temp);
- return(STATUS_SUCCESS);
+ if (!NT_SUCCESS(Status))
+ {
+ // cleanup
+ if (DeviceExt && DeviceExt->FATFileObject)
+ ObDereferenceObject (DeviceExt->FATFileObject);
+ if (Fcb)
+ ExFreePool(Fcb);
+ if (Ccb)
+ ExFreePool(Ccb);
+ if (DeviceObject)
+ IoDeleteDevice(DeviceObject);
+ }
+ return Status;
}
-NTSTATUS FsdClose(PDEVICE_OBJECT DeviceObject, PIRP Irp)
-/*
- * FUNCTION: Close a file
- */
-{
- PIO_STACK_LOCATION Stack = IoGetCurrentIrpStackLocation(Irp);
- PFILE_OBJECT FileObject = Stack->FileObject;
- PDEVICE_EXTENSION DeviceExtension = DeviceObject->DeviceExtension;
- NTSTATUS Status;
-
- Status = FsdCloseFile(DeviceExtension,FileObject);
-
- Irp->IoStatus.Status = Status;
- Irp->IoStatus.Information = 0;
-
- IoCompleteRequest(Irp, IO_NO_INCREMENT);
- return(Status);
-}
-NTSTATUS FsdCreate(PDEVICE_OBJECT DeviceObject, PIRP Irp)
+NTSTATUS VfatFileSystemControl(PVFAT_IRP_CONTEXT IrpContext)
/*
- * FUNCTION: Create or open a file
+ * FUNCTION: File system control
*/
{
- PIO_STACK_LOCATION Stack;
- PFILE_OBJECT FileObject;
- NTSTATUS Status;
- PDEVICE_EXTENSION DeviceExt;
-
- DPRINT("FsdCreate(DeviceObject %08lx, Irp %08lx)\n",
- DeviceObject,
- Irp);
-
- Stack = IoGetCurrentIrpStackLocation(Irp);
-CHECKPOINT;
- FileObject = Stack->FileObject;
-CHECKPOINT;
- DeviceExt = DeviceObject->DeviceExtension;
-CHECKPOINT;
- Status = FsdOpenFile(DeviceExt,FileObject,FileObject->FileName.Buffer);
-CHECKPOINT;
-
- Irp->IoStatus.Status = Status;
-CHECKPOINT;
- Irp->IoStatus.Information = 0;
-CHECKPOINT;
-
- IoCompleteRequest(Irp, IO_NO_INCREMENT);
-CHECKPOINT;
-
- return Status;
-}
-
-NTSTATUS FsdWrite(PDEVICE_OBJECT DeviceObject, PIRP Irp)
-/*
- * FUNCTION: Write to a file
- */
-{
- ULONG Length;
- PVOID Buffer;
- ULONG Offset;
- PIO_STACK_LOCATION Stack = IoGetCurrentIrpStackLocation(Irp);
- PFILE_OBJECT FileObject = Stack->FileObject;
- PDEVICE_EXTENSION DeviceExt = DeviceObject->DeviceExtension;
NTSTATUS Status;
-
- DPRINT("FsdWrite(DeviceObject %x Irp %x)\n",DeviceObject,Irp);
- Length = Stack->Parameters.Write.Length;
- Buffer = MmGetSystemAddressForMdl(Irp->MdlAddress);
- Offset = GET_LARGE_INTEGER_LOW_PART(Stack->Parameters.Write.ByteOffset);
+ DPRINT1("VfatFileSystemControl(IrpContext %x)\n", IrpContext);
- Status = FsdWriteFile(DeviceExt,FileObject,Buffer,Length,Offset);
+ assert (IrpContext);
- Irp->IoStatus.Status = Status;
- Irp->IoStatus.Information = Length;
- IoCompleteRequest(Irp,IO_NO_INCREMENT);
-
- return(Status);
-}
-
-NTSTATUS FsdRead(PDEVICE_OBJECT DeviceObject, PIRP Irp)
-/*
- * FUNCTION: Read from a file
- */
-{
- ULONG Length;
- PVOID Buffer;
- ULONG Offset;
- PIO_STACK_LOCATION Stack = IoGetCurrentIrpStackLocation(Irp);
- PFILE_OBJECT FileObject = Stack->FileObject;
- PDEVICE_EXTENSION DeviceExt = DeviceObject->DeviceExtension;
- NTSTATUS Status;
- ULONG LengthRead;
-
- DPRINT("FsdRead(DeviceObject %x, Irp %x)\n",DeviceObject,Irp);
-
- Length = Stack->Parameters.Read.Length;
- Buffer = MmGetSystemAddressForMdl(Irp->MdlAddress);
- Offset = GET_LARGE_INTEGER_LOW_PART(Stack->Parameters.Read.ByteOffset);
-
- Status = FsdReadFile(DeviceExt,FileObject,Buffer,Length,Offset,
- &LengthRead);
-
- Irp->IoStatus.Status = Status;
- Irp->IoStatus.Information = LengthRead;
- IoCompleteRequest(Irp,IO_NO_INCREMENT);
-
- return(Status);
-}
-
-
-NTSTATUS FsdMount(PDEVICE_OBJECT DeviceToMount)
-/*
- * FUNCTION: Mount the filesystem
- */
-{
- PDEVICE_OBJECT DeviceObject;
- PDEVICE_EXTENSION DeviceExt;
-
- IoCreateDevice(DriverObject,
- sizeof(DEVICE_EXTENSION),
- NULL,
- FILE_DEVICE_FILE_SYSTEM,
- 0,
- FALSE,
- &DeviceObject);
- DeviceObject->Flags = DeviceObject->Flags | DO_DIRECT_IO;
- DeviceExt = (PVOID)DeviceObject->DeviceExtension;
- // use same vpb as device disk
- DeviceObject->Vpb=DeviceToMount->Vpb;
- FsdMountDevice(DeviceExt,DeviceToMount);
- DeviceObject->Vpb->Flags |= VPB_MOUNTED;
- DeviceExt->StorageDevice = IoAttachDeviceToDeviceStack(DeviceObject,
- DeviceToMount);
- return(STATUS_SUCCESS);
-}
+ switch (IrpContext->MinorFunction)
+ {
+ case IRP_MN_USER_FS_REQUEST:
+ DPRINT1("VFAT FSC: IRP_MN_USER_FS_REQUEST\n");
+ Status = STATUS_INVALID_DEVICE_REQUEST;
+ break;
-NTSTATUS FsdFileSystemControl(PDEVICE_OBJECT DeviceObject, PIRP Irp)
-/*
- * FUNCTION: File system control
- */
-{
- PIO_STACK_LOCATION Stack = IoGetCurrentIrpStackLocation(Irp);
-// PVPB vpb = Stack->Parameters.Mount.Vpb;
- PDEVICE_OBJECT DeviceToMount = Stack->Parameters.Mount.DeviceObject;
- NTSTATUS Status;
+ case IRP_MN_MOUNT_VOLUME:
+ Status = VfatMount(IrpContext);
+ break;
- DPRINT("VFAT FSC\n");
+ case IRP_MN_VERIFY_VOLUME:
+ DPRINT1("VFAT FSC: IRP_MN_VERIFY_VOLUME\n");
+ Status = STATUS_INVALID_DEVICE_REQUEST;
+ break;
- if (FsdHasFileSystem(DeviceToMount))
- {
- Status = FsdMount(DeviceToMount);
+ default:
+ DPRINT1("VFAT FSC: MinorFunction %d\n", IrpContext->MinorFunction);
+ Status = STATUS_INVALID_DEVICE_REQUEST;
+ break;
}
- else
- {
- DPRINT("VFAT: Unrecognized Volume\n");
- Status = STATUS_UNRECOGNIZED_VOLUME;
- }
- DPRINT("VFAT File system successfully mounted\n");
- Irp->IoStatus.Status = Status;
- Irp->IoStatus.Information = 0;
+ IrpContext->Irp->IoStatus.Status = Status;
+ IrpContext->Irp->IoStatus.Information = 0;
- IoCompleteRequest(Irp, IO_NO_INCREMENT);
- return(Status);
+ IoCompleteRequest (IrpContext->Irp, IO_NO_INCREMENT);
+ return (Status);
}
-NTSTATUS FsdGetStandardInformation(PFCB FCB, PDEVICE_OBJECT DeviceObject,
- PFILE_STANDARD_INFORMATION StandardInfo)
-/*
- * FUNCTION: Retrieve the standard file information
- */
-{
- PDEVICE_EXTENSION DeviceExtension = DeviceObject->DeviceExtension;
- unsigned long AllocSize;
-
- RtlZeroMemory(StandardInfo, sizeof(FILE_STANDARD_INFORMATION));
-
- /* Make allocsize a rounded up multiple of BytesPerCluster */
- AllocSize = ((FCB->entry.FileSize + DeviceExtension->BytesPerCluster - 1) /
- DeviceExtension->BytesPerCluster) *
- DeviceExtension->BytesPerCluster;
-
- StandardInfo->AllocationSize = RtlConvertUlongToLargeInteger(AllocSize);
- StandardInfo->EndOfFile = RtlConvertUlongToLargeInteger(FCB->entry.FileSize);
- StandardInfo->NumberOfLinks = 0;
- StandardInfo->DeletePending = FALSE;
- if((FCB->entry.Attrib & 0x10)>0) {
- StandardInfo->Directory = TRUE;
- } else {
- StandardInfo->Directory = FALSE;
- }
-
- return STATUS_SUCCESS;
-}
-NTSTATUS FsdQueryInformation(PDEVICE_OBJECT DeviceObject, PIRP Irp)
-/*
- * FUNCTION: Retrieve the specified file information
- */
-{
- PIO_STACK_LOCATION Stack = IoGetCurrentIrpStackLocation(Irp);
- FILE_INFORMATION_CLASS FileInformationClass =
- Stack->Parameters.QueryFile.FileInformationClass;
- PFILE_OBJECT FileObject = NULL;
- PFCB FCB = NULL;
-// PCCB CCB = NULL;
-
- NTSTATUS RC = STATUS_SUCCESS;
- void *SystemBuffer;
-
- FileObject = Stack->FileObject;
-// CCB = (PCCB)(FileObject->FsContext2);
-// FCB = CCB->Buffer; // Should be CCB->FCB???
- FCB=(PFCB)(FileObject->FsContext);
-
- SystemBuffer = Irp->AssociatedIrp.SystemBuffer;
-
- switch(FileInformationClass) {
- case FileStandardInformation:
- RC = FsdGetStandardInformation(FCB, DeviceObject, SystemBuffer);
- break;
- }
-
- return RC;
-}
-
-NTSTATUS DriverEntry(PDRIVER_OBJECT _DriverObject,
- PUNICODE_STRING RegistryPath)
+NTSTATUS STDCALL
+DriverEntry(PDRIVER_OBJECT _DriverObject,
+ PUNICODE_STRING RegistryPath)
/*
* FUNCTION: Called by the system to initalize the driver
* ARGUMENTS:
*/
{
PDEVICE_OBJECT DeviceObject;
- NTSTATUS ret;
- UNICODE_STRING ustr;
- ANSI_STRING astr;
-
- DbgPrint("VFAT 0.0.5\n");
-
- DriverObject = _DriverObject;
-
- RtlInitAnsiString(&astr,"\\Device\\VFAT");
- RtlAnsiStringToUnicodeString(&ustr,&astr,TRUE);
- ret = IoCreateDevice(DriverObject,0,&ustr,
- FILE_DEVICE_FILE_SYSTEM,0,FALSE,&DeviceObject);
- if (ret!=STATUS_SUCCESS)
- {
- return(ret);
- }
+ UNICODE_STRING DeviceName;
+ NTSTATUS Status;
+
+ DbgPrint("VFAT 0.0.6\n");
+
+ VfatDriverObject = _DriverObject;
+
+ RtlInitUnicodeString(&DeviceName,
+ L"\\Device\\Vfat");
+ Status = IoCreateDevice(VfatDriverObject,
+ 0,
+ &DeviceName,
+ FILE_DEVICE_FILE_SYSTEM,
+ 0,
+ FALSE,
+ &DeviceObject);
+ if (!NT_SUCCESS(Status))
+ {
+ return (Status);
+ }
+
+ DeviceObject->Flags = DO_DIRECT_IO;
+ VfatDriverObject->MajorFunction[IRP_MJ_CLOSE] = VfatBuildRequest;
+ VfatDriverObject->MajorFunction[IRP_MJ_CREATE] = VfatBuildRequest;
+ VfatDriverObject->MajorFunction[IRP_MJ_READ] = VfatBuildRequest;
+ VfatDriverObject->MajorFunction[IRP_MJ_WRITE] = VfatBuildRequest;
+ VfatDriverObject->MajorFunction[IRP_MJ_FILE_SYSTEM_CONTROL] =
+ VfatBuildRequest;
+ VfatDriverObject->MajorFunction[IRP_MJ_QUERY_INFORMATION] =
+ VfatBuildRequest;
+ VfatDriverObject->MajorFunction[IRP_MJ_SET_INFORMATION] =
+ VfatBuildRequest;
+ VfatDriverObject->MajorFunction[IRP_MJ_DIRECTORY_CONTROL] =
+ VfatBuildRequest;
+ VfatDriverObject->MajorFunction[IRP_MJ_QUERY_VOLUME_INFORMATION] =
+ VfatBuildRequest;
+ VfatDriverObject->MajorFunction[IRP_MJ_SET_VOLUME_INFORMATION] =
+ VfatBuildRequest;
+ VfatDriverObject->MajorFunction[IRP_MJ_SHUTDOWN] = VfatShutdown;
+ VfatDriverObject->MajorFunction[IRP_MJ_CLEANUP] = VfatBuildRequest;
+
+ VfatDriverObject->DriverUnload = NULL;
- DeviceObject->Flags=0;
- DriverObject->MajorFunction[IRP_MJ_CLOSE] = FsdClose;
- DriverObject->MajorFunction[IRP_MJ_CREATE] = FsdCreate;
- DriverObject->MajorFunction[IRP_MJ_READ] = FsdRead;
- DriverObject->MajorFunction[IRP_MJ_WRITE] = FsdWrite;
- DriverObject->MajorFunction[IRP_MJ_FILE_SYSTEM_CONTROL] =
- FsdFileSystemControl;
- DriverObject->MajorFunction[IRP_MJ_QUERY_INFORMATION] =
- FsdQueryInformation;
- DriverObject->MajorFunction[IRP_MJ_DIRECTORY_CONTROL] =
- FsdDirectoryControl;
-
- DriverObject->DriverUnload = NULL;
-
IoRegisterFileSystem(DeviceObject);
- return(STATUS_SUCCESS);
+ return STATUS_SUCCESS;
}
+/* EOF */
projects / reactos.git / blobdiff