2 * Acess2 Logical Volume Manager
3 * - By John Hodge (thePowersGang)
11 int LVM_int_VFSReadEmul(void *Arg, Uint64 BlockStart, size_t BlockCount, void *Dest);
12 int LVM_int_VFSWriteEmul(void *Arg, Uint64 BlockStart, size_t BlockCount, const void *Source);
15 // --------------------------------------------------------------------
16 // Managment / Initialisation
17 // --------------------------------------------------------------------
18 int LVM_AddVolumeVFS(const char *Name, int FD)
20 return LVM_AddVolume(Name, (void*)FD, LVM_int_VFSReadEmul, LVM_int_VFSWriteEmul);
23 int LVM_AddVolume(const char *Name, void *Ptr, tLVM_ReadFcn Read, tLVM_WriteFcn Write)
26 // tLVM_Vol *real_vol;
29 dummy_vol.Read = Read;
30 dummy_vol.Write = Write;
34 // Type->CountSubvolumes
36 // Create real volume descriptor
38 // Type->PopulateSubvolumes
45 void LVM_int_SetSubvolume_Anon(tLVM_Vol *Volume, int Index, Uint64 FirstBlock, Uint64 BlockCount)
50 if( Index < 0 || Index >= Volume->nSubVolumes ) {
51 Log_Warning("LVM", "SV ID is out of range (0 < %i < %i)",
52 Index, Volume->nSubVolumes);
56 if( Volume->SubVolumes[Index] ) {
57 Log_Warning("LVM", "Attempt to set SV %i of %p twice", Index, Volume);
61 namelen = snprintf(NULL, 0, "%i", Index);
63 sv = malloc( sizeof(tLVM_SubVolume) + namelen + 1 );
68 Volume->SubVolumes[Index] = sv;
71 sprintf(sv->Name, "%i", Index);
72 sv->FirstBlock = FirstBlock;
73 sv->BlockCount = BlockCount;
74 memset(&sv->Node, 0, sizeof(tVFS_Node));
76 sv->Node.ImplPtr = sv;
77 sv->Node.Type = &gLVM_SubVolNodeType;
80 // --------------------------------------------------------------------
82 // --------------------------------------------------------------------
83 size_t LVM_int_ReadVolume(tLVM_Vol *Volume, Uint64 BlockNum, size_t BlockCount, void *Dest)
85 return Volume->Read(Volume->Ptr, BlockNum, BlockCount, Dest);
88 size_t LVM_int_WriteVolume(tLVM_Vol *Volume, Uint64 BlockNum, size_t BlockCount, const void *Src)
90 return Volume->Write(Volume->Ptr, BlockNum, BlockCount, Src);
93 int LVM_int_VFSReadEmul(void *Arg, Uint64 BlockStart, size_t BlockCount, void *Dest)
98 blocksize = 512; // TODO: Don't assume
100 rv = VFS_ReadAt( (int)Arg, BlockStart * blocksize, BlockCount * blocksize, Dest );
105 int LVM_int_VFSWriteEmul(void *Arg, Uint64 BlockStart, size_t BlockCount, const void *Source)
110 blocksize = 512; // TODO: Don't assume
112 rv = VFS_WriteAt( (int)Arg, BlockStart * blocksize, BlockCount * blocksize, Source );