Work in progress in getting GPTPartitionHandle working.

* Tried to use EFI::Header class, but there doesn't seem to be an easy
  way to actually hit the disk -- which we'll have to do to find out
  how large the GPT table is.
* Initialization of GPT disks is now working which is why I added the disk
  system add-on to the image. However, there is a caveat, as the backup
  header and table aren't written yet.
* Partitions can be deleted.
* Creating partitions does not work yet, but I don't know yet why; in
  theory it could already work.

build/jam/HaikuImage

@@ -678,7 +678,7 @@ AddFilesToHaikuImage system add-ons Screen\ Savers
 	: $(SYSTEM_ADD_ONS_SCREENSAVERS) ;
 
 AddFilesToHaikuImage system add-ons disk_systems
-	: <disk_system>intel <disk_system>bfs <disk_system>ntfs ;
+	: <disk_system>intel <disk_system>gpt <disk_system>bfs <disk_system>ntfs ;
 
 # decorators
 AddDirectoryToHaikuImage home config add-ons decorators ;

src/add-ons/disk_systems/gpt/GPTDiskAddOn.rdef

@@ -1,8 +1,4 @@
-/*
- * IntelDiskAddOn.rdef
- */
-
-resource app_signature "application/x-vnd.Haiku-IntelDiskAddOn";
+resource app_signature "application/x-vnd.Haiku-GPTDiskAddOn";
 
 resource app_version {
 	major  = 1,
@@ -11,5 +7,5 @@ resource app_version {
 	variety = 0,
 	internal = 0,
 	short_info = "1.0.0",
-	long_info = "Haiku Intel disk add-on."
+	long_info = "GUID Partition Table disk add-on."
 };

src/add-ons/disk_systems/gpt/GPTPartitionHandle.cpp

@@ -1,5 +1,6 @@
 /*
  * Copyright 2013, Axel Dörfler, axeld@pinc-software.de.
+ * Copyright 2007, Ingo Weinhold, bonefish@users.sf.net.
  * Distributed under the terms of the MIT License.
  */
 
@@ -13,6 +14,7 @@
 #include <MutablePartition.h>
 #include <PartitioningInfo.h>
 #include <PartitionParameterEditor.h>
+#include <Path.h>
 
 #include <AutoDeleter.h>
 
@@ -43,6 +45,23 @@ GPTPartitionHandle::~GPTPartitionHandle()
 status_t
 GPTPartitionHandle::Init()
 {
+	// TODO: how to get the path of a BMutablePartition?
+	//BPath path;
+	//status_t status = Partition()->GetPath(&path);
+	//if (status != B_OK)
+		//return status;
+
+	//fd = open(path.Path(), O_RDONLY);
+	//if (fd < 0)
+		//return errno;
+
+	//fHeader = new EFI::Header(fd, Partition()->BlockSize(),
+		//Partition()->BlockSize());
+	//status = fHeader->InitCheck();
+	//if (status != B_OK)
+		//return status;
+
+	//close(fd);
 	return B_OK;
 }
 
@@ -100,10 +119,12 @@ GPTPartitionHandle::GetNextSupportedType(const BMutablePartition* child,
 status_t
 GPTPartitionHandle::GetPartitioningInfo(BPartitioningInfo* info)
 {
-	// init to the full size (minus the first sector)
+	// init to the full size (minus the GPT table header and entries)
 	off_t size = Partition()->ContentSize();
-	status_t status = info->SetTo(Partition()->BlockSize(),
-		size - Partition()->BlockSize());
+	// TODO: use fHeader
+	size_t headerSize = Partition()->BlockSize() + 16384;
+	status_t status = info->SetTo(Partition()->BlockSize() + headerSize,
+		size - Partition()->BlockSize() - 2 * headerSize);
 	if (status != B_OK)
 		return status;
 
@@ -141,7 +162,7 @@ status_t
 GPTPartitionHandle::ValidateCreateChild(off_t* _offset, off_t* _size,
 	const char* typeString, BString* name, const char* parameters)
 {
-	return B_BAD_VALUE;
+	return B_OK;
 }
 
 
@@ -150,7 +171,21 @@ GPTPartitionHandle::CreateChild(off_t offset, off_t size,
 	const char* typeString, const char* name, const char* parameters,
 	BMutablePartition** _child)
 {
-	return B_BAD_VALUE;
+	// create the child
+	BMutablePartition* partition = Partition();
+	BMutablePartition* child;
+	status_t status = partition->CreateChild(0, typeString, name,
+		parameters, &child);
+	if (status != B_OK)
+		return status;
+
+	// init the child
+	child->SetOffset(offset);
+	child->SetSize(size);
+	child->SetBlockSize(partition->BlockSize());
+
+	*_child = child;
+	return B_OK;
 }
 
 

src/add-ons/disk_systems/gpt/GPTPartitionHandle.h

@@ -8,6 +8,8 @@
 
 #include <DiskSystemAddOn.h>
 
+#include "Header.h"
+
 
 class GPTPartitionHandle : public BPartitionHandle {
 public:
@@ -39,6 +41,9 @@ class GPTPartitionHandle : public BPartitionHandle {
 									const char* parameters,
 									BMutablePartition** child);
 	virtual status_t			DeleteChild(BMutablePartition* child);
+
+private:
+			EFI::Header*		fHeader;
 };
 
 

src/add-ons/disk_systems/gpt/Jamfile

@@ -1,6 +1,6 @@
 SubDir HAIKU_TOP src add-ons disk_systems gpt ;
 
-UsePrivateHeaders shared storage ;
+UsePrivateHeaders interface shared storage ;
 UsePrivateSystemHeaders ;
 
 SEARCH_SOURCE
@@ -13,5 +13,10 @@ Addon <disk_system>gpt :
 	GPTDiskAddOn.cpp
 	GPTPartitionHandle.cpp
 
+	# from the kernel partitioning system add-on
+	Header.cpp
+	crc32.cpp
+	utility.cpp
+
 	: be $(TARGET_LIBSUPC++)
 ;