#include "lvm_int.h"
// === PROTOTYPES ===
+ int LVM_int_VFSReadEmul(void *Arg, Uint64 BlockStart, size_t BlockCount, void *Dest);
+ int LVM_int_VFSWriteEmul(void *Arg, Uint64 BlockStart, size_t BlockCount, const void *Source);
// === CODE ===
// --------------------------------------------------------------------
// Managment / Initialisation
// --------------------------------------------------------------------
-int LVM_AddVolume(const char *Name, int FD)
+int LVM_AddVolumeVFS(const char *Name, int FD)
{
- // Make dummy volume descriptor (for the read code)
+ return LVM_AddVolume(Name, (void*)(Uint)FD, LVM_int_VFSReadEmul, LVM_int_VFSWriteEmul);
+}
+
+int LVM_AddVolume(const char *Name, void *Ptr, tLVM_ReadFcn Read, tLVM_WriteFcn Write)
+{
+ tLVM_Vol dummy_vol;
+// tLVM_Vol *real_vol;
+ dummy_vol.Ptr = Ptr;
+ dummy_vol.Read = Read;
+ dummy_vol.Write = Write;
+
// Determine Type
// Type->CountSubvolumes
// --------------------------------------------------------------------
size_t LVM_int_ReadVolume(tLVM_Vol *Volume, Uint64 BlockNum, size_t BlockCount, void *Dest)
{
- size_t rv;
- rv = VFS_ReadAt(
- Volume->BackingDescriptor,
- BlockNum * Volume->BlockSize,
- BlockCount * Volume->BlockSize,
- Dest
- );
- return rv / Volume->BlockSize;
+ return Volume->Read(Volume->Ptr, BlockNum, BlockCount, Dest);
}
size_t LVM_int_WriteVolume(tLVM_Vol *Volume, Uint64 BlockNum, size_t BlockCount, const void *Src)
{
+ return Volume->Write(Volume->Ptr, BlockNum, BlockCount, Src);
+}
+
+int LVM_int_VFSReadEmul(void *Arg, Uint64 BlockStart, size_t BlockCount, void *Dest)
+{
+ size_t blocksize;
size_t rv;
- rv = VFS_WriteAt(
- Volume->BackingDescriptor,
- BlockNum * Volume->BlockSize,
- BlockCount * Volume->BlockSize,
- Src
- );
- return rv / Volume->BlockSize;
+
+ blocksize = 512; // TODO: Don't assume
+
+ rv = VFS_ReadAt( (int)(Uint)Arg, BlockStart * blocksize, BlockCount * blocksize, Dest );
+ rv /= blocksize;
+ return rv;
+}
+
+int LVM_int_VFSWriteEmul(void *Arg, Uint64 BlockStart, size_t BlockCount, const void *Source)
+{
+ size_t blocksize;
+ size_t rv;
+
+ blocksize = 512; // TODO: Don't assume
+
+ rv = VFS_WriteAt( (int)(Uint)Arg, BlockStart * blocksize, BlockCount * blocksize, Source );
+ rv /= blocksize;
+ return rv;
}