Assign node IDs to packagefs nodes

Fixes module loading. elf_load_image() checks the node ID to verify
whether an image was already loaded, so giving all nodes the same ID
only gets one image loaded. The IDs don't necessarily match the ones the
kernel packagefs assigns, which could be a problem later on.

src/system/boot/loader/file_systems/packagefs/packagefs.cpp

@@ -64,6 +64,7 @@ struct PackageNode : DoublyLinkedListLinkImpl<PackageNode> {
 		fVolume(volume),
 		fParentDirectory(NULL),
 		fName(NULL),
+		fNodeID(0),
 		fMode(mode)
 	{
 		fModifiedTime.tv_sec = 0;
@@ -75,10 +76,11 @@ struct PackageNode : DoublyLinkedListLinkImpl<PackageNode> {
 		free(fName);
 	}
 
-	status_t Init(PackageDirectory* parentDir, const char* name)
+	status_t Init(PackageDirectory* parentDir, const char* name, ino_t nodeID)
 	{
 		fParentDirectory = parentDir;
 		fName = strdup(name);
+		fNodeID = nodeID;
 
 		return fName != NULL ? B_OK : B_NO_MEMORY;
 	}
@@ -93,6 +95,11 @@ struct PackageNode : DoublyLinkedListLinkImpl<PackageNode> {
 		return fName;
 	}
 
+	ino_t NodeID() const
+	{
+		return fNodeID;
+	}
+
 	mode_t Mode() const
 	{
 		return fMode;
@@ -112,6 +119,7 @@ protected:
 	PackageVolume*		fVolume;
 	PackageDirectory*	fParentDirectory;
 	char*				fName;
+	ino_t				fNodeID;
 	mode_t				fMode;
 	timespec			fModifiedTime;
 };
@@ -269,6 +277,7 @@ private:
 struct PackageVolume : BReferenceable {
 	PackageVolume()
 		:
+		fNextNodeID(1),
 		fRootDirectory(this, S_IFDIR),
 		fBufferCache(B_HPKG_DEFAULT_DATA_CHUNK_SIZE_ZLIB, 2),
 		fDataReaderFactory(&fBufferCache),
@@ -284,7 +293,12 @@ struct PackageVolume : BReferenceable {
 
 	status_t Init(int fd)
 	{
-		status_t error = fBufferCache.Init();
+		status_t error = fRootDirectory.Init(&fRootDirectory, ".",
+			NextNodeID());
+		if (error != B_OK)
+			return error;
+
+		error = fBufferCache.Init();
 		if (error != B_OK)
 			return error;
 
@@ -300,6 +314,11 @@ struct PackageVolume : BReferenceable {
 		return &fRootDirectory;
 	}
 
+	ino_t NextNodeID()
+	{
+		return fNextNodeID++;
+	}
+
 	void AddNode(PackageNode* node)
 	{
 		fRootDirectory.AddChild(node);
@@ -324,6 +343,7 @@ struct PackageVolume : BReferenceable {
 	}
 
 private:
+	ino_t						fNextNodeID;
 	PackageDirectory			fRootDirectory;
 	BBlockBufferCacheNoLock		fBufferCache;
 	BPackageDataReaderFactory	fDataReaderFactory;
@@ -408,7 +428,7 @@ struct PackageLoaderContentHandler : BPackageContentHandler {
 		if (node == NULL)
 			RETURN_ERROR(B_NO_MEMORY);
 
-		error = node->Init(parentDir, entry->Name());
+		error = node->Init(parentDir, entry->Name(), fVolume->NextNodeID());
 		if (error != B_OK) {
 			delete node;
 			RETURN_ERROR(error);
@@ -539,6 +559,11 @@ struct File : ::Node {
 		return fFile->Size();
 	}
 
+	virtual ino_t Inode() const
+	{
+		return fFile->NodeID();
+	}
+
 private:
 	PackageFile*	fFile;
 };
@@ -600,6 +625,11 @@ struct Symlink : ::Node {
 		return strlen(fSymlink->SymlinkPath()) + 1;
 	}
 
+	virtual ino_t Inode() const
+	{
+		return fSymlink->NodeID();
+	}
+
 private:
 	PackageSymlink*	fSymlink;
 };
@@ -644,6 +674,11 @@ struct Directory : ::Directory {
 		return fDirectory->Mode() & S_IFMT;
 	}
 
+	virtual ino_t Inode() const
+	{
+		return fDirectory->NodeID();
+	}
+
 	virtual status_t Open(void** _cookie, int mode)
 	{
 		if ((mode & O_ACCMODE) != O_RDONLY && (mode & O_ACCMODE) != O_RDWR)