2 * Acess2 Logical Volume Manager
3 * - By John Hodge (thePowersGang)
12 int LVM_int_VFSReadEmul(void *Arg, Uint64 BlockStart, size_t BlockCount, void *Dest);
13 int LVM_int_VFSWriteEmul(void *Arg, Uint64 BlockStart, size_t BlockCount, const void *Source);
16 // --------------------------------------------------------------------
17 // Managment / Initialisation
18 // --------------------------------------------------------------------
19 int LVM_AddVolumeVFS(const char *Name, int FD)
21 // Assuming 512-byte blocks, not a good idea
22 // return LVM_AddVolume(Name, (void*)(Uint)FD, 512, LVM_int_VFSReadEmul, LVM_int_VFSWriteEmul);
26 void *LVM_AddVolume(const tLVM_VolType *Type, const char *Name, void *Ptr, size_t BlockSize, size_t BlockCount)
31 if( BlockCount == 0 || BlockSize == 0 ) {
32 Log_Error("LVM", "BlockSize(0x%x)/BlockCount(0x%x) invalid in LVM_AddVolume",
33 BlockSize, BlockCount);
37 dummy_vol.Type = Type;
39 dummy_vol.BlockCount = BlockCount;
40 dummy_vol.BlockSize = BlockSize;
42 // Read the first block of the volume
43 void *first_block = malloc(BlockSize);
45 Log_Error("LVM", "LVM_AddVolume - malloc error on %i bytes", BlockSize);
48 if( Type->Read(Ptr, 0, 1, first_block) != 1 ) {
49 Log_Error("LVM", "LVM_AddVolume - Failed to read first sector");
55 // TODO: Determine format
58 // Type->CountSubvolumes
59 dummy_vol.nSubVolumes = fmt->CountSubvolumes(&dummy_vol, first_block);
61 // Create real volume descriptor
62 // TODO: If this needs to be rescanned later, having the subvolume list separate might be an idea
63 size_t allocsize = sizeof(tLVM_Vol) + strlen(Name) + 1 + sizeof(tLVM_SubVolume*) * dummy_vol.nSubVolumes;
64 tLVM_Vol *real_vol = malloc( allocsize );
66 Log_Error("LVM", "LVM_AddVolume - malloc error on %i bytes", allocsize);
70 real_vol->Next = NULL;
71 real_vol->Type = Type;
73 real_vol->BlockSize = BlockSize;
74 real_vol->BlockCount = BlockCount;
75 real_vol->nSubVolumes = dummy_vol.nSubVolumes;
76 real_vol->SubVolumes = (void*)( real_vol->Name + strlen(Name) + 1 );
77 real_vol->BlockSize = BlockSize;
78 strcpy(real_vol->Name, Name);
79 memset(real_vol->SubVolumes, 0, sizeof(tLVM_SubVolume*) * real_vol->nSubVolumes);
81 memset(&real_vol->DirNode, 0, sizeof(tVFS_Node));
82 real_vol->DirNode.Type = &gLVM_VolNodeType;
83 real_vol->DirNode.ImplPtr = real_vol;
84 real_vol->DirNode.Flags = VFS_FFLAG_DIRECTORY;
85 real_vol->DirNode.Size = -1;
86 memset(&real_vol->VolNode, 0, sizeof(tVFS_Node));
87 real_vol->VolNode.Type = &gLVM_VolNodeType;
88 real_vol->VolNode.ImplPtr = real_vol;
89 real_vol->VolNode.Size = BlockCount * BlockSize;
91 // Type->PopulateSubvolumes
92 fmt->PopulateSubvolumes(real_vol, first_block);
96 gpLVM_LastVolume->Next = real_vol;
97 gpLVM_LastVolume = real_vol;
102 void LVM_int_SetSubvolume_Anon(tLVM_Vol *Volume, int Index, Uint64 FirstBlock, Uint64 BlockCount)
107 if( Index < 0 || Index >= Volume->nSubVolumes ) {
108 Log_Warning("LVM", "SV ID is out of range (0 < %i < %i)",
109 Index, Volume->nSubVolumes);
113 if( Volume->SubVolumes[Index] ) {
114 Log_Warning("LVM", "Attempt to set SV %i of %p twice", Index, Volume);
118 namelen = snprintf(NULL, 0, "%i", Index);
120 sv = malloc( sizeof(tLVM_SubVolume) + namelen + 1 );
125 Volume->SubVolumes[Index] = sv;
128 sprintf(sv->Name, "%i", Index);
129 sv->FirstBlock = FirstBlock;
130 sv->BlockCount = BlockCount;
131 memset(&sv->Node, 0, sizeof(tVFS_Node));
133 sv->Node.ImplPtr = sv;
134 sv->Node.Type = &gLVM_SubVolNodeType;
135 sv->Node.Size = BlockCount * Volume->BlockSize;
137 Log_Log("LVM", "Partition %s/%s - 0x%llx+0x%llx blocks",
138 Volume->Name, sv->Name, FirstBlock, BlockCount);
141 // --------------------------------------------------------------------
143 // --------------------------------------------------------------------
144 size_t LVM_int_ReadVolume(tLVM_Vol *Volume, Uint64 BlockNum, size_t BlockCount, void *Dest)
146 return Volume->Type->Read(Volume->Ptr, BlockNum, BlockCount, Dest);
149 size_t LVM_int_WriteVolume(tLVM_Vol *Volume, Uint64 BlockNum, size_t BlockCount, const void *Src)
151 return Volume->Type->Write(Volume->Ptr, BlockNum, BlockCount, Src);
154 int LVM_int_VFSReadEmul(void *Arg, Uint64 BlockStart, size_t BlockCount, void *Dest)
159 blocksize = 512; // TODO: Don't assume
161 rv = VFS_ReadAt( (int)(Uint)Arg, BlockStart * blocksize, BlockCount * blocksize, Dest );
166 int LVM_int_VFSWriteEmul(void *Arg, Uint64 BlockStart, size_t BlockCount, const void *Source)
171 blocksize = 512; // TODO: Don't assume
173 rv = VFS_WriteAt( (int)(Uint)Arg, BlockStart * blocksize, BlockCount * blocksize, Source );