added large files feature support

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@39120 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/add-ons/kernel/file_systems/ext2/Inode.cpp

@@ -129,6 +129,12 @@ Inode::WriteBack(Transaction& transaction)
 	if (status != B_OK)
 		return status;
 
+ 	if (Node().Size() > 0x7fffffffLL) {
+		status = fVolume->ActivateLargeFiles(transaction);
+		 if (status != B_OK)
+			  return status;
+	}
+	
 	CachedBlock cached(fVolume);
 	uint8* inodeBlockData = cached.SetToWritable(transaction, inodeBlock);
 	if (inodeBlockData == NULL)

src/add-ons/kernel/file_systems/ext2/Volume.cpp

@@ -496,6 +496,7 @@ Volume::_UnsupportedIncompatibleFeatures(ext2_super_block& superBlock)
 Volume::_UnsupportedReadOnlyFeatures(ext2_super_block& superBlock)
 {
 	uint32 supportedReadOnly = EXT2_READ_ONLY_FEATURE_SPARSE_SUPER
+		| EXT2_READ_ONLY_FEATURE_LARGE_FILE
 		| EXT2_READ_ONLY_FEATURE_HUGE_FILE;
 	// TODO actually implement EXT2_READ_ONLY_FEATURE_SPARSE_SUPER when
 	// implementing superblock backup copies
@@ -588,6 +589,20 @@ Volume::WriteBlockGroup(Transaction& transaction, int32 index)
 }
 
 
+status_t
+Volume::ActivateLargeFiles(Transaction& transaction)
+{
+	if ((fSuperBlock.ReadOnlyFeatures() 
+		& EXT2_READ_ONLY_FEATURE_LARGE_FILE) != 0)
+		return B_OK;
+	
+	fSuperBlock.SetReadOnlyFeatures(fSuperBlock.ReadOnlyFeatures()
+		| EXT2_READ_ONLY_FEATURE_LARGE_FILE);
+	
+	return WriteSuperBlock(transaction);
+}
+
+
 status_t
 Volume::SaveOrphan(Transaction& transaction, ino_t newID, ino_t& oldID)
 {

src/add-ons/kernel/file_systems/ext2/Volume.h

@@ -82,6 +82,7 @@ public:
 			bool				HugeFiles() const
 									{ return (fSuperBlock.ReadOnlyFeatures()
 										& EXT2_READ_ONLY_FEATURE_HUGE_FILE) != 0; }
+			status_t			ActivateLargeFiles(Transaction& transaction);
 
 			status_t			SaveOrphan(Transaction& transaction,
 									ino_t newID, ino_t &oldID);

src/add-ons/kernel/file_systems/ext2/ext2.h

@@ -123,7 +123,9 @@ struct ext2_super_block {
 		{ free_blocks = B_HOST_TO_LENDIAN_INT32(freeBlocks); }
 	void SetLastOrphan(ino_t id)
 		{ last_orphan = B_HOST_TO_LENDIAN_INT32((uint32)id); }
-
+	void SetReadOnlyFeatures(uint32 readOnlyFeatures) const
+		{ readOnlyFeatures = B_HOST_TO_LENDIAN_INT32(readOnlyFeatures); }
+	
 	bool IsValid();
 		// implemented in Volume.cpp
 } _PACKED;
@@ -147,7 +149,7 @@ struct ext2_super_block {
 
 // read-only compatible features
 #define EXT2_READ_ONLY_FEATURE_SPARSE_SUPER		0x0001
-#define	EXT2_READ_ONLY_FEATURE_LARGE_FILE		0x0002
+#define EXT2_READ_ONLY_FEATURE_LARGE_FILE		0x0002
 #define EXT2_READ_ONLY_FEATURE_BTREE_DIRECTORY	0x0004
 #define EXT2_READ_ONLY_FEATURE_HUGE_FILE		0x0008