packagefs: Package: Use PackagesDirectory directly

... instead of Volume. Necessary to support using packages from
different directories.

src/add-ons/kernel/file_systems/packagefs/package/Package.cpp

@@ -30,6 +30,7 @@
 #include "GlobalFactory.h"
 #include "PackageDirectory.h"
 #include "PackageFile.h"
+#include "PackagesDirectory.h"
 #include "PackageSettings.h"
 #include "PackageSymlink.h"
 #include "Version.h"
@@ -789,9 +790,11 @@ private:
 // #pragma mark - Package
 
 
-Package::Package(::Volume* volume, dev_t deviceID, ino_t nodeID)
+Package::Package(::Volume* volume, PackagesDirectory* directory, dev_t deviceID,
+	ino_t nodeID)
 	:
 	fVolume(volume),
+	fPackagesDirectory(directory),
 	fFileName(),
 	fName(),
 	fInstallPath(),
@@ -806,6 +809,8 @@ Package::Package(::Volume* volume, dev_t deviceID, ino_t nodeID)
 	fDeviceID(deviceID)
 {
 	mutex_init(&fLock, "packagefs package");
+
+	fPackagesDirectory->AcquireReference();
 }
 
 
@@ -824,6 +829,8 @@ Package::~Package()
 
 	delete fVersion;
 
+	fPackagesDirectory->ReleaseReference();
+
 	mutex_destroy(&fLock);
 }
 
@@ -920,7 +927,7 @@ Package::Open()
 	}
 
 	// open the file
-	fFD = openat(fVolume->PackagesDirectoryFD(), fFileName, O_RDONLY);
+	fFD = openat(fPackagesDirectory->DirectoryFD(), fFileName, O_RDONLY);
 	if (fFD < 0) {
 		ERROR("Failed to open package file \"%s\"\n", fFileName.Data());
 		return errno;

src/add-ons/kernel/file_systems/packagefs/package/Package.h

@@ -28,6 +28,7 @@ using BPackageKit::BHPKG::BAbstractBufferedDataReader;
 
 
 class PackageLinkDirectory;
+class PackagesDirectory;
 class PackageSettings;
 class Volume;
 class Version;
@@ -36,8 +37,9 @@ class Version;
 class Package : public BReferenceable,
 	public DoublyLinkedListLinkImpl<Package> {
 public:
-								Package(::Volume* volume, dev_t deviceID,
-									ino_t nodeID);
+								Package(::Volume* volume,
+									PackagesDirectory* directory,
+									dev_t deviceID, ino_t nodeID);
 								~Package();
 
 			status_t			Init(const char* fileName);
@@ -113,6 +115,7 @@ private:
 private:
 			mutex				fLock;
 			::Volume*			fVolume;
+			PackagesDirectory*	fPackagesDirectory;
 			String				fFileName;
 			String				fName;
 			String				fInstallPath;

src/add-ons/kernel/file_systems/packagefs/volume/Volume.cpp

@@ -220,13 +220,6 @@ Volume::~Volume()
 }
 
 
-int
-Volume::PackagesDirectoryFD() const
-{
-	return fPackagesDirectory->DirectoryFD();
-}
-
-
 status_t
 Volume::Mount(const char* parameterString)
 {
@@ -1326,7 +1319,8 @@ Volume::_LoadPackage(const char* name, Package*& _package)
 	}
 
 	// create a package
-	Package* package = new(std::nothrow) Package(this, st.st_dev, st.st_ino);
+	Package* package = new(std::nothrow) Package(this, fPackagesDirectory,
+		st.st_dev, st.st_ino);
 	if (package == NULL)
 		RETURN_ERROR(B_NO_MEMORY);
 	BReference<Package> packageReference(package, true);

src/add-ons/kernel/file_systems/packagefs/volume/Volume.h

@@ -53,8 +53,6 @@ public:
 
 			::MountType			MountType() const	{ return fMountType; }
 
-			int					PackagesDirectoryFD() const;
-
 			void				SetPackageFSRoot(::PackageFSRoot* root)
 									{ fPackageFSRoot = root; }
 			::PackageFSRoot*	PackageFSRoot() const