bool ext2_read_block(PEXT2_FILESYS fs, ULONG block, void *inbuf)
{
bool retval = false;
retval = NT_SUCCESS(Ext2ReadDisk(
fs,
((ULONGLONG)block * fs->blocksize),
fs->blocksize, (unsigned char *)inbuf));
return retval;
}
bool ext2_load_inode(PEXT2_FILESYS Ext2Sys, ULONG no, PEXT2_INODE pInode)
{
LONGLONG Offset;
bool bRet = false;
if (ext2_get_inode_lba(Ext2Sys, no, &Offset))
{
bRet = NT_SUCCESS(Ext2ReadDisk(
Ext2Sys,
Offset,
sizeof(EXT2_INODE),
(unsigned char *)pInode));
}
return bRet;
}
bool ext2_read_inode(PEXT2_FILESYS Ext2Sys,
ULONG ino,
ULONG offset,
PVOID Buffer,
ULONG size,
PULONG dwReturn)
{
PEXT2_BDL ext2_bdl = NULL;
ULONG blocks, i;
bool bRet = true;
EXT2_INODE ext2_inode;
ULONG dwTotal = 0;
if (!ext2_load_inode(Ext2Sys, ino, &ext2_inode))
{
return false;
}
blocks = ext2_build_bdl(Ext2Sys, &ext2_inode, offset, size, &ext2_bdl);
if (blocks <= 0)
return false;
for(i = 0; i < blocks; i++)
{
bRet = NT_SUCCESS(Ext2ReadDisk(
Ext2Sys,
ext2_bdl[i].Lba,
ext2_bdl[i].Length,
(PUCHAR)Buffer + ext2_bdl[i].Offset
));
if (!bRet)
break;
dwTotal += ext2_bdl[i].Length;
}
*dwReturn = dwTotal;
if (ext2_bdl)
RtlFreeHeap(RtlGetProcessHeap(), 0, ext2_bdl);
return bRet;
}
