Modules/LVM - Framework for partitioning type detection

[tpg/acess2.git] / KernelLand / Modules / Storage / LVM / mbr.c

diff --git a/KernelLand/Modules/Storage/LVM/mbr.c b/KernelLand/Modules/Storage/LVM/mbr.c
index 9de8fcd..78d3d24 100644 (file)
--- a/KernelLand/Modules/Storage/LVM/mbr.c
+++ b/KernelLand/Modules/Storage/LVM/mbr.c
@@ -11,6 +11,7 @@
 #include "mbr.h"
 
 // === PROTOTYPES ===
+ int   LVM_MBR_Detect(tLVM_Vol *Volume);
  int   LVM_MBR_CountSubvolumes(tLVM_Vol *Volume, void *FirstSector);
 void   LVM_MBR_PopulateSubvolumes(tLVM_Vol *Volume, void *FirstSector);
 Uint64 LVM_MBR_int_ReadExt(tLVM_Vol *Volume, Uint64 Addr, Uint64 *Base, Uint64 *Length);
@@ -23,13 +24,25 @@ tLVM_Format gLVM_MBRType = {
 };
 
 // === CODE ===
+int LVM_MBR_Detect(tLVM_Vol *Volume)
+{
+       tMBR    mbr;
+       // TODO: handle non-512 byte sectors
+       if( LVM_int_ReadVolume( Volume, 0, 1, &mbr ) != 0 )
+               return -1;      // Stop on Errors
+
+       if( mbr.BootFlag != LittleEndian16(0xAA55) )
+               return 0;
+
+       return 1;
+}
+
 /**
  * \brief Initialise a volume as 
  */
 int LVM_MBR_CountSubvolumes(tLVM_Vol *Volume, void *FirstSector)
 {
        tMBR    *MBR = FirstSector;
-        int    i;
        Uint64  extendedLBA;
        Uint64  base, len;
         int    numPartitions = 0;
@@ -39,7 +52,7 @@ int LVM_MBR_CountSubvolumes(tLVM_Vol *Volume, void *FirstSector)
        // Count Partitions
        numPartitions = 0;
        extendedLBA = 0;
-       for( i = 0; i < 4; i ++ )
+       for( int i = 0; i < 4; i ++ )
        {
                if( MBR->Parts[i].SystemID == 0 )       continue;