Start of a file map disk driver for the bootloader.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@26911 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/kernel/boot/FileMapDisk.h

@@ -0,0 +1,68 @@
+/*
+ * Copyright 2008, François Revol <[email protected]>.
+ * All rights reserved. Distributed under the terms of the MIT License.
+ */
+
+#ifndef _BOOT_FILE_MAP_DISK_H
+#define _BOOT_FILE_MAP_DISK_H
+
+#include <boot/vfs.h>
+#include <boot/partitions.h>
+
+#define FMAP_FOLDER_NAME "BEOS"
+#define FMAP_IMAGE_NAME "IMAGE.BE"
+//#define FMAP_FOLDER_NAME "HAIKU"
+//#define FMAP_IMAGE_NAME "IMAGE.BFS"
+
+#define FMAP_MAX_RUNS 128
+
+struct file_map_run {
+	off_t offset;
+	off_t block;
+	off_t len;
+};
+
+class FileMap {
+public:
+	FileMap();
+	~FileMap();
+	void AddRun(off_t offset, off_t block, off_t len);
+
+private:
+	struct file_map_run fRuns[FMAP_MAX_RUNS];
+};
+
+class FileMapDisk : public Node {
+	public:
+		FileMapDisk();
+		virtual ~FileMapDisk();
+
+		status_t Init(Node *node/*Partition *partition, FileMap *map, off_t imageSize*/);
+
+		virtual status_t Open(void **_cookie, int mode);
+		virtual status_t Close(void *cookie);
+
+
+		virtual ssize_t ReadAt(void *cookie, off_t pos, void *buffer,
+			size_t bufferSize);
+		virtual ssize_t WriteAt(void *cookie, off_t pos, const void *buffer,
+			size_t bufferSize);
+
+		virtual status_t GetName(char *nameBuffer, size_t bufferSize) const;
+		virtual off_t Size() const;
+
+		status_t GetFileMap(FileMap **map);
+
+		static FileMapDisk *FindAnyFileMapDisk(Directory *volume);
+
+	private:
+		Node		*fNode;
+		/*
+		Partition	*fPartition;
+		FileMap		*fMap;
+		off_t		fImageSize;
+		*/
+	
+};
+
+#endif	// _BOOT_FILE_MAP_DISK_H

src/system/boot/loader/FileMapDisk.cpp

@@ -0,0 +1,151 @@
+/*
+ * Copyright 2005, Ingo Weinhold <[email protected]>.
+ * All rights reserved. Distributed under the terms of the MIT License.
+ */
+
+#include <boot/FileMapDisk.h>
+
+#include <new>
+
+#include <endian.h>
+#include <stdio.h>
+#include <string.h>
+
+#include <OS.h>
+#include <SupportDefs.h>
+
+
+// constructor
+FileMapDisk::FileMapDisk()
+{
+}
+
+// destructor
+FileMapDisk::~FileMapDisk()
+{
+}
+
+// Init
+status_t
+FileMapDisk::Init(Node *node/*, Partition *partition, FileMap *map, off_t imageSize*/)
+{
+	fNode = node;
+	/*
+	fPartition = partition;
+	fMap = map;
+	fImageSize = imageSize;
+
+	// create and bind socket
+	fSocket = new(nothrow) UDPSocket;
+	if (!fSocket)
+		return B_NO_MEMORY;
+	
+	status_t error = fSocket->Bind(INADDR_ANY, 6666);
+	if (error != B_OK)
+		return error;
+	*/
+
+	return B_OK;
+}
+
+
+status_t
+FileMapDisk::Open(void **_cookie, int mode)
+{
+	if (!fNode)
+		return B_NO_INIT;
+
+	return fNode->Open(_cookie, mode);
+}
+
+
+status_t
+FileMapDisk::Close(void *cookie)
+{
+	if (!fNode)
+		return B_NO_INIT;
+
+	return fNode->Close(cookie);
+}
+
+
+// ReadAt
+ssize_t
+FileMapDisk::ReadAt(void *cookie, off_t pos, void *_buffer,
+	size_t bufferSize)
+{
+	if (!fNode)
+		return B_NO_INIT;
+
+	return fNode->ReadAt(cookie, pos, _buffer, bufferSize);
+}
+
+
+// WriteAt
+ssize_t
+FileMapDisk::WriteAt(void */*cookie*/, off_t pos, const void *buffer,
+	size_t bufferSize)
+{
+	// Not needed in the boot loader.
+	return B_PERMISSION_DENIED;
+}
+
+// GetName
+status_t
+FileMapDisk::GetName(char *nameBuffer, size_t bufferSize) const
+{
+	const char *prefix = "FileMapDisk:";
+	if (!nameBuffer)
+		return B_BAD_VALUE;
+
+	snprintf(nameBuffer, bufferSize, prefix);
+	if (bufferSize > strlen(prefix) && fNode)
+		return fNode->GetName(nameBuffer + strlen(prefix), 
+			bufferSize - strlen(prefix));
+
+	return B_OK;
+}
+
+// Size
+off_t
+FileMapDisk::Size() const
+{
+	if (!fNode)
+		return B_NO_INIT;
+	return fNode->Size();
+}
+
+
+status_t
+FileMapDisk::GetFileMap(FileMap **map)
+{
+	return ENOSYS;
+}
+
+
+// FindAnyFileMapDisk
+FileMapDisk *
+FileMapDisk::FindAnyFileMapDisk(Directory *volume)
+{
+	Node *node;
+	status_t error;
+
+	if (!volume)
+		return NULL;
+
+	node = volume->Lookup(FMAP_FOLDER_NAME "/" FMAP_IMAGE_NAME, true);
+	if (!node)
+		return NULL;
+
+	// create a FileMapDisk object
+	FileMapDisk *disk = new(nothrow) FileMapDisk;
+	if (disk) {
+		error = disk->Init(node);
+		if (error != B_OK) {
+			delete disk;
+			disk = NULL;
+		}
+	}
+
+	return disk;
+}

src/system/boot/loader/Jamfile

@@ -34,6 +34,7 @@ UsePrivateHeaders shared storage ;
 KernelStaticLibrary boot_loader :
 	main.cpp
 	vfs.cpp
+	FileMapDisk.cpp
 	RootFileSystem.cpp
 	partitions.cpp
 	heap.cpp