[reactos] 02/02: [FREELDR] Rework EXT2 filesystem to interface with ARC and not be tied to the boot volume.
10 Aug
2019
10 Aug
'19
1:40 p.m.
https://git.reactos.org/?p=reactos.git;a=commitdiff;h=c9a20ced91a4d021366c8…
commit c9a20ced91a4d021366c81233805ff68e9066081
Author: Hermès Bélusca-Maïto <hermes.belusca-maito(a)reactos.org>
AuthorDate: Sat Aug 10 16:36:11 2019 +0200
Commit: Hermès Bélusca-Maïto <hermes.belusca-maito(a)reactos.org>
CommitDate: Sat Aug 10 16:41:29 2019 +0200
[FREELDR] Rework EXT2 filesystem to interface with ARC and not be tied to the boot
volume.
See 28bf1f3b (r42537) and c599bd7d (r43267) for additional information.
---
boot/freeldr/freeldr/include/fs/ext2.h | 12 +-
boot/freeldr/freeldr/lib/fs/ext2.c | 610 +++++++++++++++++----------------
2 files changed, 314 insertions(+), 308 deletions(-)
diff --git a/boot/freeldr/freeldr/include/fs/ext2.h
b/boot/freeldr/freeldr/include/fs/ext2.h
index c32000032c1..b1b3c7e8d38 100644
--- a/boot/freeldr/freeldr/include/fs/ext2.h
+++ b/boot/freeldr/freeldr/include/fs/ext2.h
@@ -226,13 +226,15 @@ typedef struct ext2_dirent EXT2_DIR_ENTRY, *PEXT2_DIR_ENTRY;
#define FAST_SYMLINK_MAX_NAME_SIZE 60
+typedef struct _EXT2_VOLUME_INFO *PEXT2_VOLUME_INFO;
+
typedef struct
{
- ULONGLONG FileSize; // File size
- ULONGLONG FilePointer; // File pointer
- ULONG* FileBlockList; // File block list
- UCHAR DriveNumber; // Drive number of open file
- EXT2_INODE Inode; // File's inode
+ ULONGLONG FileSize; // File size
+ ULONGLONG FilePointer; // File pointer
+ ULONG* FileBlockList; // File block list
+ EXT2_INODE Inode; // File's inode
+ PEXT2_VOLUME_INFO Volume;
} EXT2_FILE_INFO, * PEXT2_FILE_INFO;
const DEVVTBL* Ext2Mount(ULONG DeviceId);
diff --git a/boot/freeldr/freeldr/lib/fs/ext2.c b/boot/freeldr/freeldr/lib/fs/ext2.c
index e0f2bc077d8..19550c8425e 100644
--- a/boot/freeldr/freeldr/lib/fs/ext2.c
+++ b/boot/freeldr/freeldr/lib/fs/ext2.c
@@ -23,94 +23,74 @@
DBG_DEFAULT_CHANNEL(FILESYSTEM);
-BOOLEAN Ext2OpenVolume(UCHAR DriveNumber, ULONGLONG VolumeStartSector, ULONGLONG
PartitionSectorCount);
-PEXT2_FILE_INFO Ext2OpenFile(PCSTR FileName);
-BOOLEAN Ext2LookupFile(PCSTR FileName, PEXT2_FILE_INFO Ext2FileInfoPointer);
+BOOLEAN Ext2OpenVolume(PEXT2_VOLUME_INFO Volume);
+PEXT2_FILE_INFO Ext2OpenFile(PEXT2_VOLUME_INFO Volume, PCSTR FileName);
+BOOLEAN Ext2LookupFile(PEXT2_VOLUME_INFO Volume, PCSTR FileName, PEXT2_FILE_INFO
Ext2FileInfo);
BOOLEAN Ext2SearchDirectoryBufferForFile(PVOID DirectoryBuffer, ULONG DirectorySize,
PCHAR FileName, PEXT2_DIR_ENTRY DirectoryEntry);
-BOOLEAN Ext2ReadVolumeSectors(UCHAR DriveNumber, ULONGLONG SectorNumber, ULONG
SectorCount, PVOID Buffer);
+BOOLEAN Ext2ReadVolumeSectors(PEXT2_VOLUME_INFO Volume, ULONGLONG SectorNumber, ULONG
SectorCount, PVOID Buffer);
BOOLEAN Ext2ReadFileBig(PEXT2_FILE_INFO Ext2FileInfo, ULONGLONG BytesToRead,
ULONGLONG* BytesRead, PVOID Buffer);
-BOOLEAN Ext2ReadSuperBlock(VOID);
-BOOLEAN Ext2ReadGroupDescriptors(VOID);
-BOOLEAN Ext2ReadDirectory(ULONG Inode, PVOID* DirectoryBuffer, PEXT2_INODE
InodePointer);
-BOOLEAN Ext2ReadBlock(ULONG BlockNumber, PVOID Buffer);
-BOOLEAN Ext2ReadPartialBlock(ULONG BlockNumber, ULONG StartingOffset, ULONG Length,
PVOID Buffer);
-ULONG Ext2GetGroupDescBlockNumber(ULONG Group);
-ULONG Ext2GetGroupDescOffsetInBlock(ULONG Group);
-ULONG Ext2GetInodeGroupNumber(ULONG Inode);
-ULONG Ext2GetInodeBlockNumber(ULONG Inode);
-ULONG Ext2GetInodeOffsetInBlock(ULONG Inode);
-BOOLEAN Ext2ReadInode(ULONG Inode, PEXT2_INODE InodeBuffer);
-BOOLEAN Ext2ReadGroupDescriptor(ULONG Group, PEXT2_GROUP_DESC GroupBuffer);
-ULONG* Ext2ReadBlockPointerList(PEXT2_INODE Inode);
+BOOLEAN Ext2ReadSuperBlock(PEXT2_VOLUME_INFO Volume);
+BOOLEAN Ext2ReadGroupDescriptors(PEXT2_VOLUME_INFO Volume);
+BOOLEAN Ext2ReadDirectory(PEXT2_VOLUME_INFO Volume, ULONG Inode, PVOID*
DirectoryBuffer, PEXT2_INODE InodePointer);
+BOOLEAN Ext2ReadBlock(PEXT2_VOLUME_INFO Volume, ULONG BlockNumber, PVOID Buffer);
+BOOLEAN Ext2ReadPartialBlock(PEXT2_VOLUME_INFO Volume, ULONG BlockNumber, ULONG
StartingOffset, ULONG Length, PVOID Buffer);
+BOOLEAN Ext2ReadInode(PEXT2_VOLUME_INFO Volume, ULONG Inode, PEXT2_INODE
InodeBuffer);
+BOOLEAN Ext2ReadGroupDescriptor(PEXT2_VOLUME_INFO Volume, ULONG Group,
PEXT2_GROUP_DESC GroupBuffer);
+ULONG* Ext2ReadBlockPointerList(PEXT2_VOLUME_INFO Volume, PEXT2_INODE Inode);
ULONGLONG Ext2GetInodeFileSize(PEXT2_INODE Inode);
-BOOLEAN Ext2CopyIndirectBlockPointers(ULONG* BlockList, ULONG* CurrentBlockInList,
ULONG BlockCount, ULONG IndirectBlock);
-BOOLEAN Ext2CopyDoubleIndirectBlockPointers(ULONG* BlockList, ULONG*
CurrentBlockInList, ULONG BlockCount, ULONG DoubleIndirectBlock);
-BOOLEAN Ext2CopyTripleIndirectBlockPointers(ULONG* BlockList, ULONG*
CurrentBlockInList, ULONG BlockCount, ULONG TripleIndirectBlock);
+BOOLEAN Ext2CopyIndirectBlockPointers(PEXT2_VOLUME_INFO Volume, ULONG* BlockList,
ULONG* CurrentBlockInList, ULONG BlockCount, ULONG IndirectBlock);
+BOOLEAN Ext2CopyDoubleIndirectBlockPointers(PEXT2_VOLUME_INFO Volume, ULONG*
BlockList, ULONG* CurrentBlockInList, ULONG BlockCount, ULONG DoubleIndirectBlock);
+BOOLEAN Ext2CopyTripleIndirectBlockPointers(PEXT2_VOLUME_INFO Volume, ULONG*
BlockList, ULONG* CurrentBlockInList, ULONG BlockCount, ULONG TripleIndirectBlock);
-GEOMETRY Ext2DiskGeometry; // Ext2 file system disk geometry
+typedef struct _EXT2_VOLUME_INFO
+{
+ ULONG BytesPerSector; // Usually 512...
+
+ PEXT2_SUPER_BLOCK SuperBlock; // Ext2 file system super block
+ PEXT2_GROUP_DESC GroupDescriptors; // Ext2 file system group descriptors
+
+ ULONG BlockSizeInBytes; // Block size in bytes
+ ULONG BlockSizeInSectors; // Block size in sectors
+ ULONG FragmentSizeInBytes; // Fragment size in bytes
+ ULONG FragmentSizeInSectors; // Fragment size in sectors
+ ULONG GroupCount; // Number of groups in this file system
+ ULONG InodesPerBlock; // Number of inodes in one block
+ ULONG GroupDescPerBlock; // Number of group descriptors in one block
+
+ ULONG DeviceId; // Ext2 file system device ID
-PEXT2_SUPER_BLOCK Ext2SuperBlock = NULL; // Ext2 file system super block
-PEXT2_GROUP_DESC Ext2GroupDescriptors = NULL; // Ext2 file system group
descriptors
+} EXT2_VOLUME_INFO;
-UCHAR Ext2DriveNumber = 0; // Ext2 file system drive
number
-ULONGLONG Ext2VolumeStartSector = 0; // Ext2 file system starting
sector
-ULONG Ext2BlockSizeInBytes = 0; // Block size in bytes
-ULONG Ext2BlockSizeInSectors = 0; // Block size in sectors
-ULONG Ext2FragmentSizeInBytes = 0; // Fragment size in bytes
-ULONG Ext2FragmentSizeInSectors = 0; // Fragment size in sectors
-ULONG Ext2GroupCount = 0; // Number of groups in this
file system
-ULONG Ext2InodesPerBlock = 0; // Number of inodes in one
block
-ULONG Ext2GroupDescPerBlock = 0; // Number of group descriptors
in one block
+PEXT2_VOLUME_INFO Ext2Volumes[MAX_FDS];
#define TAG_EXT_BLOCK_LIST 'LtxE'
#define TAG_EXT_FILE 'FtxE'
#define TAG_EXT_BUFFER 'BtxE'
#define TAG_EXT_SUPER_BLOCK 'StxE'
#define TAG_EXT_GROUP_DESC 'GtxE'
+#define TAG_EXT_VOLUME 'VtxE'
-BOOLEAN DiskGetBootVolume(PUCHAR DriveNumber, PULONGLONG StartSector, PULONGLONG
SectorCount, int *FsType)
-{
- *DriveNumber = 0;
- *StartSector = 0;
- *SectorCount = 0;
- *FsType = 0;
- return FALSE;
-}
-
-BOOLEAN Ext2OpenVolume(UCHAR DriveNumber, ULONGLONG VolumeStartSector, ULONGLONG
PartitionSectorCount)
+BOOLEAN Ext2OpenVolume(PEXT2_VOLUME_INFO Volume)
{
+ TRACE("Ext2OpenVolume() DeviceId = %d\n", Volume->DeviceId);
- TRACE("Ext2OpenVolume() DriveNumber = 0x%x VolumeStartSector = %d\n",
DriveNumber, VolumeStartSector);
-
- // Store the drive number and start sector
- Ext2DriveNumber = DriveNumber;
- Ext2VolumeStartSector = VolumeStartSector;
-
- if (!MachDiskGetDriveGeometry(DriveNumber, &Ext2DiskGeometry))
- {
- return FALSE;
- }
-
- //
- // Initialize the disk cache for this drive
- //
+#if 0
+ /* Initialize the disk cache for this drive */
if (!CacheInitializeDrive(DriveNumber))
{
return FALSE;
}
+#endif
+ Volume->BytesPerSector = SECTOR_SIZE;
- // Read in the super block
- if (!Ext2ReadSuperBlock())
- {
+ /* Read in the super block */
+ if (!Ext2ReadSuperBlock(Volume))
return FALSE;
- }
- // Read in the group descriptors
- if (!Ext2ReadGroupDescriptors())
- {
+ /* Read in the group descriptors */
+ if (!Ext2ReadGroupDescriptors(Volume))
return FALSE;
- }
return TRUE;
}
@@ -120,7 +100,7 @@ BOOLEAN Ext2OpenVolume(UCHAR DriveNumber, ULONGLONG VolumeStartSector,
ULONGLONG
* Tries to open the file 'name' and returns true or false
* for success and failure respectively
*/
-PEXT2_FILE_INFO Ext2OpenFile(PCSTR FileName)
+PEXT2_FILE_INFO Ext2OpenFile(PEXT2_VOLUME_INFO Volume, PCSTR FileName)
{
EXT2_FILE_INFO TempExt2FileInfo;
PEXT2_FILE_INFO FileHandle;
@@ -133,7 +113,7 @@ PEXT2_FILE_INFO Ext2OpenFile(PCSTR FileName)
RtlZeroMemory(SymLinkPath, sizeof(SymLinkPath));
// Lookup the file in the file system
- if (!Ext2LookupFile(FileName, &TempExt2FileInfo))
+ if (!Ext2LookupFile(Volume, FileName, &TempExt2FileInfo))
{
return NULL;
}
@@ -194,12 +174,11 @@ PEXT2_FILE_INFO Ext2OpenFile(PCSTR FileName)
FrLdrTempFree(TempExt2FileInfo.FileBlockList, TAG_EXT_BLOCK_LIST);
}
- return Ext2OpenFile(FullPath);
+ return Ext2OpenFile(Volume, FullPath);
}
else
{
FileHandle = FrLdrTempAlloc(sizeof(EXT2_FILE_INFO), TAG_EXT_FILE);
-
if (FileHandle == NULL)
{
if (TempExt2FileInfo.FileBlockList != NULL)
@@ -223,7 +202,7 @@ PEXT2_FILE_INFO Ext2OpenFile(PCSTR FileName)
* with info describing the file, etc. returns true
* if the file exists or false otherwise
*/
-BOOLEAN Ext2LookupFile(PCSTR FileName, PEXT2_FILE_INFO Ext2FileInfoPointer)
+BOOLEAN Ext2LookupFile(PEXT2_VOLUME_INFO Volume, PCSTR FileName, PEXT2_FILE_INFO
Ext2FileInfo)
{
UINT32 i;
ULONG NumberOfPathParts;
@@ -235,7 +214,7 @@ BOOLEAN Ext2LookupFile(PCSTR FileName, PEXT2_FILE_INFO
Ext2FileInfoPointer)
TRACE("Ext2LookupFile() FileName = %s\n", FileName);
- RtlZeroMemory(Ext2FileInfoPointer, sizeof(EXT2_FILE_INFO));
+ RtlZeroMemory(Ext2FileInfo, sizeof(EXT2_FILE_INFO));
//
// Figure out how many sub-directories we are nested in
@@ -263,7 +242,7 @@ BOOLEAN Ext2LookupFile(PCSTR FileName, PEXT2_FILE_INFO
Ext2FileInfoPointer)
//
// Buffer the directory contents
//
- if (!Ext2ReadDirectory(DirectoryInode, &DirectoryBuffer, &InodeData))
+ if (!Ext2ReadDirectory(Volume, DirectoryInode, &DirectoryBuffer,
&InodeData))
{
return FALSE;
}
@@ -282,7 +261,7 @@ BOOLEAN Ext2LookupFile(PCSTR FileName, PEXT2_FILE_INFO
Ext2FileInfoPointer)
DirectoryInode = DirectoryEntry.inode;
}
- if (!Ext2ReadInode(DirectoryInode, &InodeData))
+ if (!Ext2ReadInode(Volume, DirectoryInode, &InodeData))
{
return FALSE;
}
@@ -294,8 +273,8 @@ BOOLEAN Ext2LookupFile(PCSTR FileName, PEXT2_FILE_INFO
Ext2FileInfoPointer)
return FALSE;
}
- // Set the drive number
- Ext2FileInfoPointer->DriveNumber = Ext2DriveNumber;
+ // Set the associated volume
+ Ext2FileInfo->Volume = Volume;
// If it's a regular file or a regular symbolic link
// then get the block pointer list otherwise it must
@@ -303,21 +282,20 @@ BOOLEAN Ext2LookupFile(PCSTR FileName, PEXT2_FILE_INFO
Ext2FileInfoPointer)
if (((InodeData.mode & EXT2_S_IFMT) == EXT2_S_IFREG) ||
((InodeData.mode & EXT2_S_IFMT) == EXT2_S_IFLNK && InodeData.size
> FAST_SYMLINK_MAX_NAME_SIZE))
{
- Ext2FileInfoPointer->FileBlockList =
Ext2ReadBlockPointerList(&InodeData);
-
- if (Ext2FileInfoPointer->FileBlockList == NULL)
+ Ext2FileInfo->FileBlockList = Ext2ReadBlockPointerList(Volume,
&InodeData);
+ if (Ext2FileInfo->FileBlockList == NULL)
{
return FALSE;
}
}
else
{
- Ext2FileInfoPointer->FileBlockList = NULL;
+ Ext2FileInfo->FileBlockList = NULL;
}
- Ext2FileInfoPointer->FilePointer = 0;
- Ext2FileInfoPointer->FileSize = Ext2GetInodeFileSize(&InodeData);
- RtlCopyMemory(&Ext2FileInfoPointer->Inode, &InodeData,
sizeof(EXT2_INODE));
+ Ext2FileInfo->FilePointer = 0;
+ Ext2FileInfo->FileSize = Ext2GetInodeFileSize(&InodeData);
+ RtlCopyMemory(&Ext2FileInfo->Inode, &InodeData, sizeof(EXT2_INODE));
return TRUE;
}
@@ -380,6 +358,7 @@ BOOLEAN Ext2SearchDirectoryBufferForFile(PVOID DirectoryBuffer, ULONG
DirectoryS
*/
BOOLEAN Ext2ReadFileBig(PEXT2_FILE_INFO Ext2FileInfo, ULONGLONG BytesToRead, ULONGLONG*
BytesRead, PVOID Buffer)
{
+ PEXT2_VOLUME_INFO Volume = Ext2FileInfo->Volume;
ULONG BlockNumber;
ULONG BlockNumberIndex;
ULONG OffsetInBlock;
@@ -475,20 +454,20 @@ BOOLEAN Ext2ReadFileBig(PEXT2_FILE_INFO Ext2FileInfo, ULONGLONG
BytesToRead, ULO
// Only do the first read if we
// aren't aligned on a block boundary
//
- if (Ext2FileInfo->FilePointer % Ext2BlockSizeInBytes)
+ if (Ext2FileInfo->FilePointer % Volume->BlockSizeInBytes)
{
//
// Do the math for our first read
//
- BlockNumberIndex = (ULONG)(Ext2FileInfo->FilePointer / Ext2BlockSizeInBytes);
+ BlockNumberIndex = (ULONG)(Ext2FileInfo->FilePointer /
Volume->BlockSizeInBytes);
BlockNumber = Ext2FileInfo->FileBlockList[BlockNumberIndex];
- OffsetInBlock = (Ext2FileInfo->FilePointer % Ext2BlockSizeInBytes);
- LengthInBlock = (ULONG)((BytesToRead > (Ext2BlockSizeInBytes - OffsetInBlock))
? (Ext2BlockSizeInBytes - OffsetInBlock) : BytesToRead);
+ OffsetInBlock = (Ext2FileInfo->FilePointer % Volume->BlockSizeInBytes);
+ LengthInBlock = (ULONG)((BytesToRead > (Volume->BlockSizeInBytes -
OffsetInBlock)) ? (Volume->BlockSizeInBytes - OffsetInBlock) : BytesToRead);
//
// Now do the read and update BytesRead, BytesToRead, FilePointer, & Buffer
//
- if (!Ext2ReadPartialBlock(BlockNumber, OffsetInBlock, LengthInBlock, Buffer))
+ if (!Ext2ReadPartialBlock(Volume, BlockNumber, OffsetInBlock, LengthInBlock,
Buffer))
{
return FALSE;
}
@@ -509,27 +488,27 @@ BOOLEAN Ext2ReadFileBig(PEXT2_FILE_INFO Ext2FileInfo, ULONGLONG
BytesToRead, ULO
//
// Determine how many full clusters we need to read
//
- NumberOfBlocks = (ULONG)(BytesToRead / Ext2BlockSizeInBytes);
+ NumberOfBlocks = (ULONG)(BytesToRead / Volume->BlockSizeInBytes);
while (NumberOfBlocks > 0)
{
- BlockNumberIndex = (ULONG)(Ext2FileInfo->FilePointer /
Ext2BlockSizeInBytes);
+ BlockNumberIndex = (ULONG)(Ext2FileInfo->FilePointer /
Volume->BlockSizeInBytes);
BlockNumber = Ext2FileInfo->FileBlockList[BlockNumberIndex];
//
// Now do the read and update BytesRead, BytesToRead, FilePointer, &
Buffer
//
- if (!Ext2ReadBlock(BlockNumber, Buffer))
+ if (!Ext2ReadBlock(Volume, BlockNumber, Buffer))
{
return FALSE;
}
if (BytesRead != NULL)
{
- *BytesRead += Ext2BlockSizeInBytes;
+ *BytesRead += Volume->BlockSizeInBytes;
}
- BytesToRead -= Ext2BlockSizeInBytes;
- Ext2FileInfo->FilePointer += Ext2BlockSizeInBytes;
- Buffer = (PVOID)((ULONG_PTR)Buffer + Ext2BlockSizeInBytes);
+ BytesToRead -= Volume->BlockSizeInBytes;
+ Ext2FileInfo->FilePointer += Volume->BlockSizeInBytes;
+ Buffer = (PVOID)((ULONG_PTR)Buffer + Volume->BlockSizeInBytes);
NumberOfBlocks--;
}
}
@@ -539,13 +518,13 @@ BOOLEAN Ext2ReadFileBig(PEXT2_FILE_INFO Ext2FileInfo, ULONGLONG
BytesToRead, ULO
//
if (BytesToRead > 0)
{
- BlockNumberIndex = (ULONG)(Ext2FileInfo->FilePointer / Ext2BlockSizeInBytes);
+ BlockNumberIndex = (ULONG)(Ext2FileInfo->FilePointer /
Volume->BlockSizeInBytes);
BlockNumber = Ext2FileInfo->FileBlockList[BlockNumberIndex];
//
// Now do the read and update BytesRead, BytesToRead, FilePointer, & Buffer
//
- if (!Ext2ReadPartialBlock(BlockNumber, 0, (ULONG)BytesToRead, Buffer))
+ if (!Ext2ReadPartialBlock(Volume, BlockNumber, 0, (ULONG)BytesToRead, Buffer))
{
return FALSE;
}
@@ -561,100 +540,122 @@ BOOLEAN Ext2ReadFileBig(PEXT2_FILE_INFO Ext2FileInfo, ULONGLONG
BytesToRead, ULO
return TRUE;
}
-BOOLEAN Ext2ReadVolumeSectors(UCHAR DriveNumber, ULONGLONG SectorNumber, ULONG
SectorCount, PVOID Buffer)
+BOOLEAN Ext2ReadVolumeSectors(PEXT2_VOLUME_INFO Volume, ULONGLONG SectorNumber, ULONG
SectorCount, PVOID Buffer)
{
- //GEOMETRY DiskGeometry;
- //BOOLEAN ReturnValue;
- //if (!DiskGetDriveGeometry(DriveNumber, &DiskGeometry))
- //{
- // return FALSE;
- //}
- //ReturnValue = MachDiskReadLogicalSectors(DriveNumber, SectorNumber +
Ext2VolumeStartSector, SectorCount, DiskReadBuffer);
- //RtlCopyMemory(Buffer, DiskReadBuffer, SectorCount * DiskGeometry.BytesPerSector);
- //return ReturnValue;
-
+#if 0
return CacheReadDiskSectors(DriveNumber, SectorNumber + Ext2VolumeStartSector,
SectorCount, Buffer);
+#endif
+
+ LARGE_INTEGER Position;
+ ULONG Count;
+ ARC_STATUS Status;
+
+ /* Seek to right position */
+ Position.QuadPart = (ULONGLONG)SectorNumber * 512;
+ Status = ArcSeek(Volume->DeviceId, &Position, SeekAbsolute);
+ if (Status != ESUCCESS)
+ {
+ TRACE("Ext2ReadVolumeSectors() Failed to seek\n");
+ return FALSE;
+ }
+
+ /* Read data */
+ Status = ArcRead(Volume->DeviceId, Buffer, SectorCount * 512, &Count);
+ if (Status != ESUCCESS || Count != SectorCount * 512)
+ {
+ TRACE("Ext2ReadVolumeSectors() Failed to read\n");
+ return FALSE;
+ }
+
+ /* Return success */
+ return TRUE;
}
-BOOLEAN Ext2ReadSuperBlock(VOID)
+BOOLEAN Ext2ReadSuperBlock(PEXT2_VOLUME_INFO Volume)
{
+ PEXT2_SUPER_BLOCK SuperBlock = Volume->SuperBlock;
+ LARGE_INTEGER Position;
+ ULONG Count;
+ ARC_STATUS Status;
TRACE("Ext2ReadSuperBlock()\n");
- //
- // Free any memory previously allocated
- //
- if (Ext2SuperBlock != NULL)
+#if 0
+ /* Free any memory previously allocated */
+ if (SuperBlock != NULL)
{
- FrLdrTempFree(Ext2SuperBlock, TAG_EXT_SUPER_BLOCK);
-
- Ext2SuperBlock = NULL;
+ FrLdrTempFree(SuperBlock, TAG_EXT_SUPER_BLOCK);
+ SuperBlock = NULL;
}
+#endif
- //
- // Now allocate the memory to hold the super block
- //
- Ext2SuperBlock = (PEXT2_SUPER_BLOCK)FrLdrTempAlloc(1024, TAG_EXT_SUPER_BLOCK);
-
- //
- // Make sure we got the memory
- //
- if (Ext2SuperBlock == NULL)
+ /* Allocate the memory to hold the super block if needed */
+ if (SuperBlock == NULL)
{
- FileSystemError("Out of memory.");
- return FALSE;
+ SuperBlock = (PEXT2_SUPER_BLOCK)FrLdrTempAlloc(1024, TAG_EXT_SUPER_BLOCK);
+ if (SuperBlock == NULL)
+ {
+ FileSystemError("Out of memory.");
+ return FALSE;
+ }
}
+ Volume->SuperBlock = SuperBlock;
- // Now try to read the super block
- // If this fails then abort
- if (!MachDiskReadLogicalSectors(Ext2DriveNumber, Ext2VolumeStartSector, 8,
DiskReadBuffer))
- {
+ /* Reset its contents */
+ RtlZeroMemory(SuperBlock, 1024);
+
+ /* Read the SuperBlock */
+ Position.QuadPart = 2 * 512;
+ Status = ArcSeek(Volume->DeviceId, &Position, SeekAbsolute);
+ if (Status != ESUCCESS)
+ return FALSE;
+ Status = ArcRead(Volume->DeviceId, SuperBlock, 2 * 512, &Count);
+ if (Status != ESUCCESS || Count != 2 * 512)
return FALSE;
- }
- RtlCopyMemory(Ext2SuperBlock, ((PUCHAR)DiskReadBuffer + 1024), 1024);
TRACE("Dumping super block:\n");
- TRACE("total_inodes: %d\n", Ext2SuperBlock->total_inodes);
- TRACE("total_blocks: %d\n", Ext2SuperBlock->total_blocks);
- TRACE("reserved_blocks: %d\n", Ext2SuperBlock->reserved_blocks);
- TRACE("free_blocks: %d\n", Ext2SuperBlock->free_blocks);
- TRACE("free_inodes: %d\n", Ext2SuperBlock->free_inodes);
- TRACE("first_data_block: %d\n", Ext2SuperBlock->first_data_block);
- TRACE("log2_block_size: %d\n", Ext2SuperBlock->log2_block_size);
- TRACE("log2_fragment_size: %d\n", Ext2SuperBlock->log2_fragment_size);
- TRACE("blocks_per_group: %d\n", Ext2SuperBlock->blocks_per_group);
- TRACE("fragments_per_group: %d\n",
Ext2SuperBlock->fragments_per_group);
- TRACE("inodes_per_group: %d\n", Ext2SuperBlock->inodes_per_group);
- TRACE("mtime: %d\n", Ext2SuperBlock->mtime);
- TRACE("utime: %d\n", Ext2SuperBlock->utime);
- TRACE("mnt_count: %d\n", Ext2SuperBlock->mnt_count);
- TRACE("max_mnt_count: %d\n", Ext2SuperBlock->max_mnt_count);
- TRACE("magic: 0x%x\n", Ext2SuperBlock->magic);
- TRACE("fs_state: %d\n", Ext2SuperBlock->fs_state);
- TRACE("error_handling: %d\n", Ext2SuperBlock->error_handling);
- TRACE("minor_revision_level: %d\n",
Ext2SuperBlock->minor_revision_level);
- TRACE("lastcheck: %d\n", Ext2SuperBlock->lastcheck);
- TRACE("checkinterval: %d\n", Ext2SuperBlock->checkinterval);
- TRACE("creator_os: %d\n", Ext2SuperBlock->creator_os);
- TRACE("revision_level: %d\n", Ext2SuperBlock->revision_level);
- TRACE("uid_reserved: %d\n", Ext2SuperBlock->uid_reserved);
- TRACE("gid_reserved: %d\n", Ext2SuperBlock->gid_reserved);
- TRACE("first_inode: %d\n", Ext2SuperBlock->first_inode);
- TRACE("inode_size: %d\n", Ext2SuperBlock->inode_size);
- TRACE("block_group_number: %d\n", Ext2SuperBlock->block_group_number);
- TRACE("feature_compatibility: 0x%x\n",
Ext2SuperBlock->feature_compatibility);
- TRACE("feature_incompat: 0x%x\n", Ext2SuperBlock->feature_incompat);
- TRACE("feature_ro_compat: 0x%x\n", Ext2SuperBlock->feature_ro_compat);
+ TRACE("total_inodes: %d\n", SuperBlock->total_inodes);
+ TRACE("total_blocks: %d\n", SuperBlock->total_blocks);
+ TRACE("reserved_blocks: %d\n", SuperBlock->reserved_blocks);
+ TRACE("free_blocks: %d\n", SuperBlock->free_blocks);
+ TRACE("free_inodes: %d\n", SuperBlock->free_inodes);
+ TRACE("first_data_block: %d\n", SuperBlock->first_data_block);
+ TRACE("log2_block_size: %d\n", SuperBlock->log2_block_size);
+ TRACE("log2_fragment_size: %d\n", SuperBlock->log2_fragment_size);
+ TRACE("blocks_per_group: %d\n", SuperBlock->blocks_per_group);
+ TRACE("fragments_per_group: %d\n", SuperBlock->fragments_per_group);
+ TRACE("inodes_per_group: %d\n", SuperBlock->inodes_per_group);
+ TRACE("mtime: %d\n", SuperBlock->mtime);
+ TRACE("utime: %d\n", SuperBlock->utime);
+ TRACE("mnt_count: %d\n", SuperBlock->mnt_count);
+ TRACE("max_mnt_count: %d\n", SuperBlock->max_mnt_count);
+ TRACE("magic: 0x%x\n", SuperBlock->magic);
+ TRACE("fs_state: %d\n", SuperBlock->fs_state);
+ TRACE("error_handling: %d\n", SuperBlock->error_handling);
+ TRACE("minor_revision_level: %d\n", SuperBlock->minor_revision_level);
+ TRACE("lastcheck: %d\n", SuperBlock->lastcheck);
+ TRACE("checkinterval: %d\n", SuperBlock->checkinterval);
+ TRACE("creator_os: %d\n", SuperBlock->creator_os);
+ TRACE("revision_level: %d\n", SuperBlock->revision_level);
+ TRACE("uid_reserved: %d\n", SuperBlock->uid_reserved);
+ TRACE("gid_reserved: %d\n", SuperBlock->gid_reserved);
+ TRACE("first_inode: %d\n", SuperBlock->first_inode);
+ TRACE("inode_size: %d\n", SuperBlock->inode_size);
+ TRACE("block_group_number: %d\n", SuperBlock->block_group_number);
+ TRACE("feature_compatibility: 0x%x\n",
SuperBlock->feature_compatibility);
+ TRACE("feature_incompat: 0x%x\n", SuperBlock->feature_incompat);
+ TRACE("feature_ro_compat: 0x%x\n", SuperBlock->feature_ro_compat);
TRACE("unique_id = { 0x%x, 0x%x, 0x%x, 0x%x }\n",
- Ext2SuperBlock->unique_id[0], Ext2SuperBlock->unique_id[1],
Ext2SuperBlock->unique_id[2], Ext2SuperBlock->unique_id[3]);
- TRACE("volume_name = '%.16s'\n", Ext2SuperBlock->volume_name);
- TRACE("last_mounted_on = '%.64s'\n",
Ext2SuperBlock->last_mounted_on);
- TRACE("compression_info = 0x%x\n", Ext2SuperBlock->compression_info);
+ SuperBlock->unique_id[0], SuperBlock->unique_id[1],
+ SuperBlock->unique_id[2], SuperBlock->unique_id[3]);
+ TRACE("volume_name = '%.16s'\n", SuperBlock->volume_name);
+ TRACE("last_mounted_on = '%.64s'\n",
SuperBlock->last_mounted_on);
+ TRACE("compression_info = 0x%x\n", SuperBlock->compression_info);
//
// Check the super block magic
//
- if (Ext2SuperBlock->magic != EXT2_MAGIC)
+ if (SuperBlock->magic != EXT2_MAGIC)
{
FileSystemError("Invalid super block magic (0xef53)");
return FALSE;
@@ -663,7 +664,7 @@ BOOLEAN Ext2ReadSuperBlock(VOID)
//
// Check the revision level
//
- if (Ext2SuperBlock->revision_level > EXT2_DYNAMIC_REVISION)
+ if (SuperBlock->revision_level > EXT2_DYNAMIC_REVISION)
{
FileSystemError("FreeLoader does not understand the revision of this
EXT2/EXT3 filesystem.\nPlease update FreeLoader.");
return FALSE;
@@ -674,57 +675,57 @@ BOOLEAN Ext2ReadSuperBlock(VOID)
// Don't need to check the compatible or read-only compatible features
// because we only mount the filesystem as read-only
//
- if ((Ext2SuperBlock->revision_level >= EXT2_DYNAMIC_REVISION) &&
- (/*((Ext2SuperBlock->s_feature_compat & ~EXT3_FEATURE_COMPAT_SUPP) != 0)
||*/
- /*((Ext2SuperBlock->s_feature_ro_compat & ~EXT3_FEATURE_RO_COMPAT_SUPP)
!= 0) ||*/
- ((Ext2SuperBlock->feature_incompat & ~EXT3_FEATURE_INCOMPAT_SUPP) !=
0)))
+ if ((SuperBlock->revision_level >= EXT2_DYNAMIC_REVISION) &&
+ (/*((SuperBlock->s_feature_compat & ~EXT3_FEATURE_COMPAT_SUPP) != 0) ||*/
+ /*((SuperBlock->s_feature_ro_compat & ~EXT3_FEATURE_RO_COMPAT_SUPP) != 0)
||*/
+ ((SuperBlock->feature_incompat & ~EXT3_FEATURE_INCOMPAT_SUPP) != 0)))
{
FileSystemError("FreeLoader does not understand features of this EXT2/EXT3
filesystem.\nPlease update FreeLoader.");
return FALSE;
}
// Calculate the group count
- Ext2GroupCount = (Ext2SuperBlock->total_blocks -
Ext2SuperBlock->first_data_block + Ext2SuperBlock->blocks_per_group - 1) /
Ext2SuperBlock->blocks_per_group;
- TRACE("Ext2GroupCount: %d\n", Ext2GroupCount);
+ Volume->GroupCount = (SuperBlock->total_blocks -
SuperBlock->first_data_block + SuperBlock->blocks_per_group - 1) /
SuperBlock->blocks_per_group;
+ TRACE("Ext2GroupCount: %d\n", Volume->GroupCount);
// Calculate the block size
- Ext2BlockSizeInBytes = 1024 << Ext2SuperBlock->log2_block_size;
- Ext2BlockSizeInSectors = Ext2BlockSizeInBytes / Ext2DiskGeometry.BytesPerSector;
- TRACE("Ext2BlockSizeInBytes: %d\n", Ext2BlockSizeInBytes);
- TRACE("Ext2BlockSizeInSectors: %d\n", Ext2BlockSizeInSectors);
+ Volume->BlockSizeInBytes = 1024 << SuperBlock->log2_block_size;
+ Volume->BlockSizeInSectors = Volume->BlockSizeInBytes /
Volume->BytesPerSector;
+ TRACE("Ext2BlockSizeInBytes: %d\n", Volume->BlockSizeInBytes);
+ TRACE("Ext2BlockSizeInSectors: %d\n", Volume->BlockSizeInSectors);
// Calculate the fragment size
- if (Ext2SuperBlock->log2_fragment_size >= 0)
+ if (SuperBlock->log2_fragment_size >= 0)
{
- Ext2FragmentSizeInBytes = 1024 << Ext2SuperBlock->log2_fragment_size;
+ Volume->FragmentSizeInBytes = 1024 <<
SuperBlock->log2_fragment_size;
}
else
{
- Ext2FragmentSizeInBytes = 1024 >>
-(Ext2SuperBlock->log2_fragment_size);
+ Volume->FragmentSizeInBytes = 1024 >>
-(SuperBlock->log2_fragment_size);
}
- Ext2FragmentSizeInSectors = Ext2FragmentSizeInBytes /
Ext2DiskGeometry.BytesPerSector;
- TRACE("Ext2FragmentSizeInBytes: %d\n", Ext2FragmentSizeInBytes);
- TRACE("Ext2FragmentSizeInSectors: %d\n", Ext2FragmentSizeInSectors);
+ Volume->FragmentSizeInSectors = Volume->FragmentSizeInBytes /
Volume->BytesPerSector;
+ TRACE("Ext2FragmentSizeInBytes: %d\n", Volume->FragmentSizeInBytes);
+ TRACE("Ext2FragmentSizeInSectors: %d\n",
Volume->FragmentSizeInSectors);
// Verify that the fragment size and the block size are equal
- if (Ext2BlockSizeInBytes != Ext2FragmentSizeInBytes)
+ if (Volume->BlockSizeInBytes != Volume->FragmentSizeInBytes)
{
FileSystemError("The fragment size must be equal to the block size.");
return FALSE;
}
// Calculate the number of inodes in one block
- Ext2InodesPerBlock = Ext2BlockSizeInBytes / EXT2_INODE_SIZE(Ext2SuperBlock);
- TRACE("Ext2InodesPerBlock: %d\n", Ext2InodesPerBlock);
+ Volume->InodesPerBlock = Volume->BlockSizeInBytes /
EXT2_INODE_SIZE(SuperBlock);
+ TRACE("Ext2InodesPerBlock: %d\n", Volume->InodesPerBlock);
// Calculate the number of group descriptors in one block
- Ext2GroupDescPerBlock = EXT2_DESC_PER_BLOCK(Ext2SuperBlock);
- TRACE("Ext2GroupDescPerBlock: %d\n", Ext2GroupDescPerBlock);
+ Volume->GroupDescPerBlock = EXT2_DESC_PER_BLOCK(SuperBlock);
+ TRACE("Ext2GroupDescPerBlock: %d\n", Volume->GroupDescPerBlock);
return TRUE;
}
-BOOLEAN Ext2ReadGroupDescriptors(VOID)
+BOOLEAN Ext2ReadGroupDescriptors(PEXT2_VOLUME_INFO Volume)
{
ULONG GroupDescBlockCount;
ULONG BlockNumber;
@@ -732,57 +733,48 @@ BOOLEAN Ext2ReadGroupDescriptors(VOID)
TRACE("Ext2ReadGroupDescriptors()\n");
- //
- // Free any memory previously allocated
- //
- if (Ext2GroupDescriptors != NULL)
+ /* Free any memory previously allocated */
+ if (Volume->GroupDescriptors != NULL)
{
- FrLdrTempFree(Ext2GroupDescriptors, TAG_EXT_GROUP_DESC);
-
- Ext2GroupDescriptors = NULL;
+ FrLdrTempFree(Volume->GroupDescriptors, TAG_EXT_GROUP_DESC);
+ Volume->GroupDescriptors = NULL;
}
- //
- // Now allocate the memory to hold the group descriptors
- //
- GroupDescBlockCount = ROUND_UP(Ext2GroupCount, Ext2GroupDescPerBlock) /
Ext2GroupDescPerBlock;
- Ext2GroupDescriptors = (PEXT2_GROUP_DESC)FrLdrTempAlloc(GroupDescBlockCount *
Ext2BlockSizeInBytes, TAG_EXT_GROUP_DESC);
-
- //
- // Make sure we got the memory
- //
- if (Ext2GroupDescriptors == NULL)
+ /* Now allocate the memory to hold the group descriptors */
+ GroupDescBlockCount = ROUND_UP(Volume->GroupCount, Volume->GroupDescPerBlock) /
Volume->GroupDescPerBlock;
+ Volume->GroupDescriptors = (PEXT2_GROUP_DESC)FrLdrTempAlloc(GroupDescBlockCount *
Volume->BlockSizeInBytes, TAG_EXT_GROUP_DESC);
+ if (Volume->GroupDescriptors == NULL)
{
FileSystemError("Out of memory.");
return FALSE;
}
// Now read the group descriptors
- CurrentGroupDescBlock = (PUCHAR)Ext2GroupDescriptors;
- BlockNumber = Ext2SuperBlock->first_data_block + 1;
+ CurrentGroupDescBlock = (PUCHAR)Volume->GroupDescriptors;
+ BlockNumber = Volume->SuperBlock->first_data_block + 1;
while (GroupDescBlockCount--)
{
- if (!Ext2ReadBlock(BlockNumber, CurrentGroupDescBlock))
+ if (!Ext2ReadBlock(Volume, BlockNumber, CurrentGroupDescBlock))
{
return FALSE;
}
BlockNumber++;
- CurrentGroupDescBlock += Ext2BlockSizeInBytes;
+ CurrentGroupDescBlock += Volume->BlockSizeInBytes;
}
return TRUE;
}
-BOOLEAN Ext2ReadDirectory(ULONG Inode, PVOID* DirectoryBuffer, PEXT2_INODE InodePointer)
+BOOLEAN Ext2ReadDirectory(PEXT2_VOLUME_INFO Volume, ULONG Inode, PVOID* DirectoryBuffer,
PEXT2_INODE InodePointer)
{
- EXT2_FILE_INFO DirectoryFileInfo;
+ EXT2_FILE_INFO DirectoryFileInfo;
TRACE("Ext2ReadDirectory() Inode = %d\n", Inode);
// Read the directory inode
- if (!Ext2ReadInode(Inode, InodePointer))
+ if (!Ext2ReadInode(Volume, Inode, InodePointer))
{
return FALSE;
}
@@ -796,8 +788,8 @@ BOOLEAN Ext2ReadDirectory(ULONG Inode, PVOID* DirectoryBuffer,
PEXT2_INODE Inode
// Fill in file info struct so we can call Ext2ReadFileBig()
RtlZeroMemory(&DirectoryFileInfo, sizeof(EXT2_FILE_INFO));
- DirectoryFileInfo.DriveNumber = Ext2DriveNumber;
- DirectoryFileInfo.FileBlockList = Ext2ReadBlockPointerList(InodePointer);
+ DirectoryFileInfo.Volume = Volume;
+ DirectoryFileInfo.FileBlockList = Ext2ReadBlockPointerList(Volume, InodePointer);
DirectoryFileInfo.FilePointer = 0;
DirectoryFileInfo.FileSize = Ext2GetInodeFileSize(InodePointer);
@@ -835,14 +827,14 @@ BOOLEAN Ext2ReadDirectory(ULONG Inode, PVOID* DirectoryBuffer,
PEXT2_INODE Inode
return TRUE;
}
-BOOLEAN Ext2ReadBlock(ULONG BlockNumber, PVOID Buffer)
+BOOLEAN Ext2ReadBlock(PEXT2_VOLUME_INFO Volume, ULONG BlockNumber, PVOID Buffer)
{
CHAR ErrorString[80];
TRACE("Ext2ReadBlock() BlockNumber = %d Buffer = 0x%x\n", BlockNumber,
Buffer);
// Make sure its a valid block
- if (BlockNumber > Ext2SuperBlock->total_blocks)
+ if (BlockNumber > Volume->SuperBlock->total_blocks)
{
sprintf(ErrorString, "Error reading block %d - block out of range.",
(int) BlockNumber);
FileSystemError(ErrorString);
@@ -854,28 +846,29 @@ BOOLEAN Ext2ReadBlock(ULONG BlockNumber, PVOID Buffer)
{
TRACE("Block is part of a sparse file. Zeroing input buffer.\n");
- RtlZeroMemory(Buffer, Ext2BlockSizeInBytes);
+ RtlZeroMemory(Buffer, Volume->BlockSizeInBytes);
return TRUE;
}
- return Ext2ReadVolumeSectors(Ext2DriveNumber, (ULONGLONG)BlockNumber *
Ext2BlockSizeInSectors, Ext2BlockSizeInSectors, Buffer);
+ return Ext2ReadVolumeSectors(Volume, (ULONGLONG)BlockNumber *
Volume->BlockSizeInSectors, Volume->BlockSizeInSectors, Buffer);
}
/*
* Ext2ReadPartialBlock()
* Reads part of a block into memory
*/
-BOOLEAN Ext2ReadPartialBlock(ULONG BlockNumber, ULONG StartingOffset, ULONG Length, PVOID
Buffer)
+BOOLEAN Ext2ReadPartialBlock(PEXT2_VOLUME_INFO Volume, ULONG BlockNumber, ULONG
StartingOffset, ULONG Length, PVOID Buffer)
{
PVOID TempBuffer;
TRACE("Ext2ReadPartialBlock() BlockNumber = %d StartingOffset = %d Length = %d
Buffer = 0x%x\n", BlockNumber, StartingOffset, Length, Buffer);
- TempBuffer = FrLdrTempAlloc(Ext2BlockSizeInBytes, TAG_EXT_BUFFER);
+ TempBuffer = FrLdrTempAlloc(Volume->BlockSizeInBytes, TAG_EXT_BUFFER);
- if (!Ext2ReadBlock(BlockNumber, TempBuffer))
+ if (!Ext2ReadBlock(Volume, BlockNumber, TempBuffer))
{
+ FrLdrTempFree(TempBuffer, TAG_EXT_BUFFER);
return FALSE;
}
@@ -886,32 +879,34 @@ BOOLEAN Ext2ReadPartialBlock(ULONG BlockNumber, ULONG
StartingOffset, ULONG Leng
return TRUE;
}
-ULONG Ext2GetGroupDescBlockNumber(ULONG Group)
+#if 0
+ULONG Ext2GetGroupDescBlockNumber(PEXT2_VOLUME_INFO Volume, ULONG Group)
{
- return (((Group * sizeof(EXT2_GROUP_DESC)) / Ext2GroupDescPerBlock) +
Ext2SuperBlock->first_data_block + 1);
+ return (((Group * sizeof(EXT2_GROUP_DESC)) / Volume->GroupDescPerBlock) +
Volume->SuperBlock->first_data_block + 1);
}
-ULONG Ext2GetGroupDescOffsetInBlock(ULONG Group)
+ULONG Ext2GetGroupDescOffsetInBlock(PEXT2_VOLUME_INFO Volume, ULONG Group)
{
- return ((Group * sizeof(EXT2_GROUP_DESC)) % Ext2GroupDescPerBlock);
+ return ((Group * sizeof(EXT2_GROUP_DESC)) % Volume->GroupDescPerBlock);
}
+#endif
-ULONG Ext2GetInodeGroupNumber(ULONG Inode)
+ULONG Ext2GetInodeGroupNumber(PEXT2_VOLUME_INFO Volume, ULONG Inode)
{
- return ((Inode - 1) / Ext2SuperBlock->inodes_per_group);
+ return ((Inode - 1) / Volume->SuperBlock->inodes_per_group);
}
-ULONG Ext2GetInodeBlockNumber(ULONG Inode)
+ULONG Ext2GetInodeBlockNumber(PEXT2_VOLUME_INFO Volume, ULONG Inode)
{
- return (((Inode - 1) % Ext2SuperBlock->inodes_per_group) / Ext2InodesPerBlock);
+ return (((Inode - 1) % Volume->SuperBlock->inodes_per_group) /
Volume->InodesPerBlock);
}
-ULONG Ext2GetInodeOffsetInBlock(ULONG Inode)
+ULONG Ext2GetInodeOffsetInBlock(PEXT2_VOLUME_INFO Volume, ULONG Inode)
{
- return (((Inode - 1) % Ext2SuperBlock->inodes_per_group) % Ext2InodesPerBlock);
+ return (((Inode - 1) % Volume->SuperBlock->inodes_per_group) %
Volume->InodesPerBlock);
}
-BOOLEAN Ext2ReadInode(ULONG Inode, PEXT2_INODE InodeBuffer)
+BOOLEAN Ext2ReadInode(PEXT2_VOLUME_INFO Volume, ULONG Inode, PEXT2_INODE InodeBuffer)
{
ULONG InodeGroupNumber;
ULONG InodeBlockNumber;
@@ -922,7 +917,7 @@ BOOLEAN Ext2ReadInode(ULONG Inode, PEXT2_INODE InodeBuffer)
TRACE("Ext2ReadInode() Inode = %d\n", Inode);
// Make sure its a valid inode
- if ((Inode < 1) || (Inode > Ext2SuperBlock->total_inodes))
+ if ((Inode < 1) || (Inode > Volume->SuperBlock->total_inodes))
{
sprintf(ErrorString, "Error reading inode %ld - inode out of range.",
Inode);
FileSystemError(ErrorString);
@@ -930,15 +925,15 @@ BOOLEAN Ext2ReadInode(ULONG Inode, PEXT2_INODE InodeBuffer)
}
// Get inode group & block number and offset in block
- InodeGroupNumber = Ext2GetInodeGroupNumber(Inode);
- InodeBlockNumber = Ext2GetInodeBlockNumber(Inode);
- InodeOffsetInBlock = Ext2GetInodeOffsetInBlock(Inode);
+ InodeGroupNumber = Ext2GetInodeGroupNumber(Volume, Inode);
+ InodeBlockNumber = Ext2GetInodeBlockNumber(Volume, Inode);
+ InodeOffsetInBlock = Ext2GetInodeOffsetInBlock(Volume, Inode);
TRACE("InodeGroupNumber = %d\n", InodeGroupNumber);
TRACE("InodeBlockNumber = %d\n", InodeBlockNumber);
TRACE("InodeOffsetInBlock = %d\n", InodeOffsetInBlock);
// Read the group descriptor
- if (!Ext2ReadGroupDescriptor(InodeGroupNumber, &GroupDescriptor))
+ if (!Ext2ReadGroupDescriptor(Volume, InodeGroupNumber, &GroupDescriptor))
{
return FALSE;
}
@@ -948,8 +943,9 @@ BOOLEAN Ext2ReadInode(ULONG Inode, PEXT2_INODE InodeBuffer)
TRACE("InodeBlockNumber (after group desc correction) = %d\n",
InodeBlockNumber);
// Read the block
- if (!Ext2ReadPartialBlock(InodeBlockNumber,
- (InodeOffsetInBlock * EXT2_INODE_SIZE(Ext2SuperBlock)),
+ if (!Ext2ReadPartialBlock(Volume,
+ InodeBlockNumber,
+ (InodeOffsetInBlock *
EXT2_INODE_SIZE(Volume->SuperBlock)),
sizeof(EXT2_INODE),
InodeBuffer))
{
@@ -986,18 +982,19 @@ BOOLEAN Ext2ReadInode(ULONG Inode, PEXT2_INODE InodeBuffer)
return TRUE;
}
-BOOLEAN Ext2ReadGroupDescriptor(ULONG Group, PEXT2_GROUP_DESC GroupBuffer)
+BOOLEAN Ext2ReadGroupDescriptor(PEXT2_VOLUME_INFO Volume, ULONG Group, PEXT2_GROUP_DESC
GroupBuffer)
{
TRACE("Ext2ReadGroupDescriptor()\n");
- /*if (!Ext2ReadBlock(Ext2GetGroupDescBlockNumber(Group), (PVOID)FILESYSBUFFER))
+#if 0
+ if (!Ext2ReadBlock(Volume, Ext2GetGroupDescBlockNumber(Volume, Group),
(PVOID)FILESYSBUFFER))
{
return FALSE;
}
+ RtlCopyMemory(GroupBuffer, (PVOID)(FILESYSBUFFER +
Ext2GetGroupDescOffsetInBlock(Volume, Group)), sizeof(EXT2_GROUP_DESC));
+#endif
- RtlCopyMemory(GroupBuffer, (PVOID)(FILESYSBUFFER +
Ext2GetGroupDescOffsetInBlock(Group)), sizeof(EXT2_GROUP_DESC));*/
-
- RtlCopyMemory(GroupBuffer, &Ext2GroupDescriptors[Group],
sizeof(EXT2_GROUP_DESC));
+ RtlCopyMemory(GroupBuffer, &Volume->GroupDescriptors[Group],
sizeof(EXT2_GROUP_DESC));
TRACE("Dumping group descriptor:\n");
TRACE("block_id = %d\n", GroupBuffer->block_id);
@@ -1010,7 +1007,7 @@ BOOLEAN Ext2ReadGroupDescriptor(ULONG Group, PEXT2_GROUP_DESC
GroupBuffer)
return TRUE;
}
-ULONG* Ext2ReadBlockPointerList(PEXT2_INODE Inode)
+ULONG* Ext2ReadBlockPointerList(PEXT2_VOLUME_INFO Volume, PEXT2_INODE Inode)
{
ULONGLONG FileSize;
ULONG BlockCount;
@@ -1027,8 +1024,8 @@ ULONG* Ext2ReadBlockPointerList(PEXT2_INODE Inode)
// it is much bigger.
//BlockCount = Inode->i_blocks;
FileSize = Ext2GetInodeFileSize(Inode);
- FileSize = ROUND_UP(FileSize, Ext2BlockSizeInBytes);
- BlockCount = (ULONG)(FileSize / Ext2BlockSizeInBytes);
+ FileSize = ROUND_UP(FileSize, Volume->BlockSizeInBytes);
+ BlockCount = (ULONG)(FileSize / Volume->BlockSizeInBytes);
// Allocate the memory for the block list
BlockList = FrLdrTempAlloc(BlockCount * sizeof(ULONG), TAG_EXT_BLOCK_LIST);
@@ -1050,7 +1047,7 @@ ULONG* Ext2ReadBlockPointerList(PEXT2_INODE Inode)
// Copy the indirect block pointers
if (CurrentBlockInList < BlockCount)
{
- if (!Ext2CopyIndirectBlockPointers(BlockList, &CurrentBlockInList,
BlockCount, Inode->blocks.indir_block))
+ if (!Ext2CopyIndirectBlockPointers(Volume, BlockList, &CurrentBlockInList,
BlockCount, Inode->blocks.indir_block))
{
FrLdrTempFree(BlockList, TAG_EXT_BLOCK_LIST);
return NULL;
@@ -1060,7 +1057,7 @@ ULONG* Ext2ReadBlockPointerList(PEXT2_INODE Inode)
// Copy the double indirect block pointers
if (CurrentBlockInList < BlockCount)
{
- if (!Ext2CopyDoubleIndirectBlockPointers(BlockList, &CurrentBlockInList,
BlockCount, Inode->blocks.double_indir_block))
+ if (!Ext2CopyDoubleIndirectBlockPointers(Volume, BlockList,
&CurrentBlockInList, BlockCount, Inode->blocks.double_indir_block))
{
FrLdrTempFree(BlockList, TAG_EXT_BLOCK_LIST);
return NULL;
@@ -1070,7 +1067,7 @@ ULONG* Ext2ReadBlockPointerList(PEXT2_INODE Inode)
// Copy the triple indirect block pointers
if (CurrentBlockInList < BlockCount)
{
- if (!Ext2CopyTripleIndirectBlockPointers(BlockList, &CurrentBlockInList,
BlockCount, Inode->blocks.tripple_indir_block))
+ if (!Ext2CopyTripleIndirectBlockPointers(Volume, BlockList,
&CurrentBlockInList, BlockCount, Inode->blocks.tripple_indir_block))
{
FrLdrTempFree(BlockList, TAG_EXT_BLOCK_LIST);
return NULL;
@@ -1092,7 +1089,7 @@ ULONGLONG Ext2GetInodeFileSize(PEXT2_INODE Inode)
}
}
-BOOLEAN Ext2CopyIndirectBlockPointers(ULONG* BlockList, ULONG* CurrentBlockInList, ULONG
BlockCount, ULONG IndirectBlock)
+BOOLEAN Ext2CopyIndirectBlockPointers(PEXT2_VOLUME_INFO Volume, ULONG* BlockList, ULONG*
CurrentBlockInList, ULONG BlockCount, ULONG IndirectBlock)
{
ULONG* BlockBuffer;
ULONG CurrentBlock;
@@ -1100,15 +1097,15 @@ BOOLEAN Ext2CopyIndirectBlockPointers(ULONG* BlockList, ULONG*
CurrentBlockInLis
TRACE("Ext2CopyIndirectBlockPointers() BlockCount = %d\n", BlockCount);
- BlockPointersPerBlock = Ext2BlockSizeInBytes / sizeof(ULONG);
+ BlockPointersPerBlock = Volume->BlockSizeInBytes / sizeof(ULONG);
- BlockBuffer = FrLdrTempAlloc(Ext2BlockSizeInBytes, TAG_EXT_BUFFER);
+ BlockBuffer = FrLdrTempAlloc(Volume->BlockSizeInBytes, TAG_EXT_BUFFER);
if (!BlockBuffer)
{
return FALSE;
}
- if (!Ext2ReadBlock(IndirectBlock, BlockBuffer))
+ if (!Ext2ReadBlock(Volume, IndirectBlock, BlockBuffer))
{
return FALSE;
}
@@ -1124,7 +1121,7 @@ BOOLEAN Ext2CopyIndirectBlockPointers(ULONG* BlockList, ULONG*
CurrentBlockInLis
return TRUE;
}
-BOOLEAN Ext2CopyDoubleIndirectBlockPointers(ULONG* BlockList, ULONG* CurrentBlockInList,
ULONG BlockCount, ULONG DoubleIndirectBlock)
+BOOLEAN Ext2CopyDoubleIndirectBlockPointers(PEXT2_VOLUME_INFO Volume, ULONG* BlockList,
ULONG* CurrentBlockInList, ULONG BlockCount, ULONG DoubleIndirectBlock)
{
ULONG* BlockBuffer;
ULONG CurrentBlock;
@@ -1132,15 +1129,15 @@ BOOLEAN Ext2CopyDoubleIndirectBlockPointers(ULONG* BlockList,
ULONG* CurrentBloc
TRACE("Ext2CopyDoubleIndirectBlockPointers() BlockCount = %d\n",
BlockCount);
- BlockPointersPerBlock = Ext2BlockSizeInBytes / sizeof(ULONG);
+ BlockPointersPerBlock = Volume->BlockSizeInBytes / sizeof(ULONG);
- BlockBuffer = (ULONG*)FrLdrTempAlloc(Ext2BlockSizeInBytes, TAG_EXT_BUFFER);
+ BlockBuffer = (ULONG*)FrLdrTempAlloc(Volume->BlockSizeInBytes, TAG_EXT_BUFFER);
if (BlockBuffer == NULL)
{
return FALSE;
}
- if (!Ext2ReadBlock(DoubleIndirectBlock, BlockBuffer))
+ if (!Ext2ReadBlock(Volume, DoubleIndirectBlock, BlockBuffer))
{
FrLdrTempFree(BlockBuffer, TAG_EXT_BUFFER);
return FALSE;
@@ -1148,7 +1145,7 @@ BOOLEAN Ext2CopyDoubleIndirectBlockPointers(ULONG* BlockList, ULONG*
CurrentBloc
for (CurrentBlock=0; (*CurrentBlockInList)<BlockCount &&
CurrentBlock<BlockPointersPerBlock; CurrentBlock++)
{
- if (!Ext2CopyIndirectBlockPointers(BlockList, CurrentBlockInList, BlockCount,
BlockBuffer[CurrentBlock]))
+ if (!Ext2CopyIndirectBlockPointers(Volume, BlockList, CurrentBlockInList,
BlockCount, BlockBuffer[CurrentBlock]))
{
FrLdrTempFree(BlockBuffer, TAG_EXT_BUFFER);
return FALSE;
@@ -1159,7 +1156,7 @@ BOOLEAN Ext2CopyDoubleIndirectBlockPointers(ULONG* BlockList, ULONG*
CurrentBloc
return TRUE;
}
-BOOLEAN Ext2CopyTripleIndirectBlockPointers(ULONG* BlockList, ULONG* CurrentBlockInList,
ULONG BlockCount, ULONG TripleIndirectBlock)
+BOOLEAN Ext2CopyTripleIndirectBlockPointers(PEXT2_VOLUME_INFO Volume, ULONG* BlockList,
ULONG* CurrentBlockInList, ULONG BlockCount, ULONG TripleIndirectBlock)
{
ULONG* BlockBuffer;
ULONG CurrentBlock;
@@ -1167,15 +1164,15 @@ BOOLEAN Ext2CopyTripleIndirectBlockPointers(ULONG* BlockList,
ULONG* CurrentBloc
TRACE("Ext2CopyTripleIndirectBlockPointers() BlockCount = %d\n",
BlockCount);
- BlockPointersPerBlock = Ext2BlockSizeInBytes / sizeof(ULONG);
+ BlockPointersPerBlock = Volume->BlockSizeInBytes / sizeof(ULONG);
- BlockBuffer = (ULONG*)FrLdrTempAlloc(Ext2BlockSizeInBytes, TAG_EXT_BUFFER);
+ BlockBuffer = (ULONG*)FrLdrTempAlloc(Volume->BlockSizeInBytes, TAG_EXT_BUFFER);
if (BlockBuffer == NULL)
{
return FALSE;
}
- if (!Ext2ReadBlock(TripleIndirectBlock, BlockBuffer))
+ if (!Ext2ReadBlock(Volume, TripleIndirectBlock, BlockBuffer))
{
FrLdrTempFree(BlockBuffer, TAG_EXT_BUFFER);
return FALSE;
@@ -1183,7 +1180,7 @@ BOOLEAN Ext2CopyTripleIndirectBlockPointers(ULONG* BlockList, ULONG*
CurrentBloc
for (CurrentBlock=0; (*CurrentBlockInList)<BlockCount &&
CurrentBlock<BlockPointersPerBlock; CurrentBlock++)
{
- if (!Ext2CopyDoubleIndirectBlockPointers(BlockList, CurrentBlockInList,
BlockCount, BlockBuffer[CurrentBlock]))
+ if (!Ext2CopyDoubleIndirectBlockPointers(Volume, BlockList, CurrentBlockInList,
BlockCount, BlockBuffer[CurrentBlock]))
{
FrLdrTempFree(BlockBuffer, TAG_EXT_BUFFER);
return FALSE;
@@ -1219,30 +1216,27 @@ ARC_STATUS Ext2GetFileInformation(ULONG FileId, FILEINFORMATION*
Information)
ARC_STATUS Ext2Open(CHAR* Path, OPENMODE OpenMode, ULONG* FileId)
{
+ PEXT2_VOLUME_INFO Volume;
PEXT2_FILE_INFO FileHandle;
- //ULONG DeviceId;
+ ULONG DeviceId;
+ /* Check parameters */
if (OpenMode != OpenReadOnly)
return EACCES;
- //DeviceId = FsGetDeviceId(*FileId);
+ /* Get underlying device */
+ DeviceId = FsGetDeviceId(*FileId);
+ Volume = Ext2Volumes[DeviceId];
TRACE("Ext2Open() FileName = %s\n", Path);
- //
- // Call old open method
- //
- FileHandle = Ext2OpenFile(Path);
-
- //
- // Check for error
- //
+ /* Call the internal open method */
+ // Status = Ext2OpenFile(Volume, Path, &FileHandle);
+ FileHandle = Ext2OpenFile(Volume, Path);
if (!FileHandle)
return ENOENT;
- //
- // Success. Remember the handle
- //
+ /* Success, remember the handle */
FsSetDeviceSpecific(*FileId, FileHandle);
return ESUCCESS;
}
@@ -1297,6 +1291,7 @@ const DEVVTBL Ext2FuncTable =
const DEVVTBL* Ext2Mount(ULONG DeviceId)
{
+ PEXT2_VOLUME_INFO Volume;
EXT2_SUPER_BLOCK SuperBlock;
LARGE_INTEGER Position;
ULONG Count;
@@ -1304,40 +1299,49 @@ const DEVVTBL* Ext2Mount(ULONG DeviceId)
TRACE("Enter Ext2Mount(%lu)\n", DeviceId);
- //
- // Read the SuperBlock
- //
- Position.HighPart = 0;
- Position.LowPart = 2 * 512;
+ /* Allocate data for volume information */
+ Volume = FrLdrTempAlloc(sizeof(EXT2_VOLUME_INFO), TAG_EXT_VOLUME);
+ if (!Volume)
+ return NULL;
+ RtlZeroMemory(Volume, sizeof(EXT2_VOLUME_INFO));
+
+ /* Read the SuperBlock */
+ Position.QuadPart = 2 * 512;
Status = ArcSeek(DeviceId, &Position, SeekAbsolute);
if (Status != ESUCCESS)
+ {
+ FrLdrTempFree(Volume, TAG_EXT_VOLUME);
return NULL;
+ }
Status = ArcRead(DeviceId, &SuperBlock, sizeof(SuperBlock), &Count);
if (Status != ESUCCESS || Count != sizeof(SuperBlock))
+ {
+ FrLdrTempFree(Volume, TAG_EXT_VOLUME);
return NULL;
+ }
- //
- // Check if SuperBlock is valid. If yes, return Ext2 function table
- //
- if (SuperBlock.magic == EXT2_MAGIC)
+ /* Check if SuperBlock is valid. If yes, return Ext2 function table. */
+ if (SuperBlock.magic != EXT2_MAGIC)
{
- //
- // Compatibility hack as long as FS is not using underlying device DeviceId
- //
- UCHAR DriveNumber;
- ULONGLONG StartSector;
- ULONGLONG SectorCount;
- int Type;
- if (!DiskGetBootVolume(&DriveNumber, &StartSector, &SectorCount,
&Type))
- return NULL;
- Ext2OpenVolume(DriveNumber, StartSector, SectorCount);
-
- /* Return success */
- TRACE("Ext2Mount(%lu) success\n", DeviceId);
- return &Ext2FuncTable;
+ FrLdrTempFree(Volume, TAG_EXT_VOLUME);
+ return NULL;
}
- else
+
+ Volume->DeviceId = DeviceId;
+
+ /* Really open the volume */
+ if (!Ext2OpenVolume(Volume))
+ {
+ FrLdrTempFree(Volume, TAG_EXT_VOLUME);
return NULL;
+ }
+
+ /* Remember EXT2 volume information */
+ Ext2Volumes[DeviceId] = Volume;
+
+ /* Return success */
+ TRACE("Ext2Mount(%lu) success\n", DeviceId);
+ return &Ext2FuncTable;
}
#endif
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Hermès Bélusca-Maïto