From 08bc0c87326899a62ccb0f08b3d334c82b199f07 Mon Sep 17 00:00:00 2001 From: John Hodge Date: Tue, 21 Jan 2014 18:14:08 +0800 Subject: [PATCH] Modules/LVM - Framework for partitioning type detection --- KernelLand/Modules/Storage/LVM/mbr.c | 17 +++++++++++++++-- 1 file changed, 15 insertions(+), 2 deletions(-) diff --git a/KernelLand/Modules/Storage/LVM/mbr.c b/KernelLand/Modules/Storage/LVM/mbr.c index 9de8fcd9..78d3d24d 100644 --- 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; -- 2.20.1