X-Git-Url: https://git.ucc.asn.au/?a=blobdiff_plain;f=KernelLand%2FModules%2FStorage%2FLVM%2Fvolumes.c;h=c9ce9a8287efb84267372c99204a637ca8a99ee5;hb=c8bd079f05637954fb0a177d24b7045c7c9609e1;hp=e69de29bb2d1d6434b8b29ae775ad8c2e48c5391;hpb=48743e39650eb1ef988380e9d95f27fd40d3a9ce;p=tpg%2Facess2.git

diff --git a/KernelLand/Modules/Storage/LVM/volumes.c b/KernelLand/Modules/Storage/LVM/volumes.c
index e69de29b..c9ce9a82 100644
--- a/KernelLand/Modules/Storage/LVM/volumes.c
+++ b/KernelLand/Modules/Storage/LVM/volumes.c
@@ -0,0 +1,159 @@
+/*
+ * Acess2 Logical Volume Manager
+ * - By John Hodge (thePowersGang)
+ *
+ * volumes.c
+ * - Volume management
+ */
+#define DEBUG	1
+#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_AddVolumeVFS(const char *Name, int FD)
+{
+	// Assuming 512-byte blocks, not a good idea
+//	return LVM_AddVolume(Name, (void*)(Uint)FD, 512, LVM_int_VFSReadEmul, LVM_int_VFSWriteEmul);
+	return 0;
+}
+
+int LVM_AddVolume(const tLVM_VolType *Type, const char *Name, void *Ptr, size_t BlockSize, size_t BlockCount)
+{
+	tLVM_Vol	dummy_vol;
+	tLVM_Vol	*real_vol;
+	tLVM_Format	*fmt;
+	void	*first_block;
+
+	dummy_vol.Type = Type;
+	dummy_vol.Ptr = Ptr;
+	dummy_vol.BlockCount = BlockCount;
+	dummy_vol.BlockSize = BlockSize;
+
+	// Read the first block of the volume	
+	first_block = malloc(BlockSize);
+	Type->Read(Ptr, 0, 1, first_block);
+	
+	// Determine Format
+	// TODO: Determine format
+	fmt = &gLVM_MBRType;
+
+	// Type->CountSubvolumes
+	dummy_vol.nSubVolumes = fmt->CountSubvolumes(&dummy_vol, first_block);
+	
+	// Create real volume descriptor
+	// TODO: If this needs to be rescanned later, having the subvolume list separate might be an idea
+	real_vol = malloc( sizeof(tLVM_Vol) + strlen(Name) + 1 + sizeof(tLVM_SubVolume*) * dummy_vol.nSubVolumes );
+	real_vol->Next = NULL;
+	real_vol->Type = Type;
+	real_vol->Ptr = Ptr;
+	real_vol->BlockSize = BlockSize;
+	real_vol->BlockCount = BlockCount;
+	real_vol->nSubVolumes = dummy_vol.nSubVolumes;
+	real_vol->SubVolumes = (void*)( real_vol->Name + strlen(Name) + 1 );
+	real_vol->BlockSize = BlockSize;
+	strcpy(real_vol->Name, Name);
+	memset(real_vol->SubVolumes, 0, sizeof(tLVM_SubVolume*) * real_vol->nSubVolumes);
+	// - VFS Nodes
+	memset(&real_vol->DirNode, 0, sizeof(tVFS_Node));
+	real_vol->DirNode.Type = &gLVM_VolNodeType;
+	real_vol->DirNode.ImplPtr = real_vol;
+	real_vol->DirNode.Flags = VFS_FFLAG_DIRECTORY;
+	real_vol->DirNode.Size = -1;
+	memset(&real_vol->VolNode, 0, sizeof(tVFS_Node));
+	real_vol->VolNode.Type = &gLVM_VolNodeType;
+	real_vol->VolNode.ImplPtr = real_vol;
+	real_vol->VolNode.Size = BlockCount * BlockSize;
+
+	// Type->PopulateSubvolumes
+	fmt->PopulateSubvolumes(real_vol, first_block);
+	free(first_block);
+
+	// Add to volume list
+	gpLVM_LastVolume->Next = real_vol;
+	gpLVM_LastVolume = real_vol;
+
+	return 0;
+}
+
+void LVM_int_SetSubvolume_Anon(tLVM_Vol *Volume, int Index, Uint64 FirstBlock, Uint64 BlockCount)
+{
+	tLVM_SubVolume	*sv;
+	 int	namelen;
+
+	if( Index < 0 || Index >= Volume->nSubVolumes ) {
+		Log_Warning("LVM", "SV ID is out of range (0 < %i < %i)",
+			Index, Volume->nSubVolumes);
+		return ;
+	}
+
+	if( Volume->SubVolumes[Index] ) {
+		Log_Warning("LVM", "Attempt to set SV %i of %p twice", Index, Volume);
+		return ;
+	}
+	
+	namelen = snprintf(NULL, 0, "%i", Index);
+
+	sv = malloc( sizeof(tLVM_SubVolume) + namelen + 1 );
+	if(!sv) {
+		// Oh, f*ck
+		return ;
+	}
+	Volume->SubVolumes[Index] = sv;	
+
+	sv->Vol = Volume;
+	sprintf(sv->Name, "%i", Index);
+	sv->FirstBlock = FirstBlock;
+	sv->BlockCount = BlockCount;
+	memset(&sv->Node, 0, sizeof(tVFS_Node));
+	
+	sv->Node.ImplPtr = sv;
+	sv->Node.Type = &gLVM_SubVolNodeType;
+	sv->Node.Size = BlockCount * Volume->BlockSize;
+	
+	Log_Log("LVM", "Partition %s/%s - 0x%llx+0x%llx blocks",
+		Volume->Name, sv->Name, FirstBlock, BlockCount);
+}
+
+// --------------------------------------------------------------------
+// IO
+// --------------------------------------------------------------------
+size_t LVM_int_ReadVolume(tLVM_Vol *Volume, Uint64 BlockNum, size_t BlockCount, void *Dest)
+{
+	return Volume->Type->Read(Volume->Ptr, BlockNum, BlockCount, Dest);
+}
+
+size_t LVM_int_WriteVolume(tLVM_Vol *Volume, Uint64 BlockNum, size_t BlockCount, const void *Src)
+{
+	return Volume->Type->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;
+
+	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;
+}
+