From 3c496a30a8c22105fcf21089dce53809e5201205 Mon Sep 17 00:00:00 2001
From: John Hodge <tpg@mutabah.net>
Date: Mon, 24 May 2010 13:32:21 +0800
Subject: [PATCH] Update to tVFS_Node to support hard links

---
 Kernel/include/vfs.h           | 11 +++++++++-
 Modules/Filesystems/Ext2/dir.c | 40 ++++++++++++++++++++++++----------
 2 files changed, 38 insertions(+), 13 deletions(-)

diff --git a/Kernel/include/vfs.h b/Kernel/include/vfs.h
index e3a61d43..ab0bd35b 100644
--- a/Kernel/include/vfs.h
+++ b/Kernel/include/vfs.h
@@ -224,7 +224,7 @@ typedef struct sVFS_Node
 	 * \param Node	Pointer to this node
 	 * \param Name	Name of the new child
 	 * \param Flags	Flags to apply to the new child (directory or symlink)
-	 * \return Boolean success
+	 * \return Zero on Success, non-zero on error (see errno.h)
 	 */
 	 int	(*MkNod)(struct sVFS_Node *Node, char *Name, Uint Flags);
 	
@@ -236,6 +236,15 @@ typedef struct sVFS_Node
 	 * \return Zero on Success, non-zero on error (see errno.h)
 	 */
 	 int	(*Relink)(struct sVFS_Node *Node, char *OldName, char *NewName);
+	
+	/**
+	 * \brief Link a node to a name
+	 * \param Node	Pointer to this node (directory)
+	 * \param Child	Node to create a new link to
+	 * \param NewName	Name for the new link
+	 * \return Zeron on success, non-zero on error (see errno.h)
+	 */
+	 int	(*Link)(struct sVFS_Node *Node, struct sVFS_Node *Child, char *NewName);
 	 
 	 /**
 	  * }
diff --git a/Modules/Filesystems/Ext2/dir.c b/Modules/Filesystems/Ext2/dir.c
index 86092b0f..1832ff97 100644
--- a/Modules/Filesystems/Ext2/dir.c
+++ b/Modules/Filesystems/Ext2/dir.c
@@ -13,16 +13,17 @@
 
 
 // === PROTOTYPES ===
-char		*Ext2_ReadDir(tVFS_Node *Node, int Pos);
+char	*Ext2_ReadDir(tVFS_Node *Node, int Pos);
 tVFS_Node	*Ext2_FindDir(tVFS_Node *Node, char *FileName);
- int		Ext2_MkNod(tVFS_Node *Node, char *Name, Uint Flags);
+ int	Ext2_MkNod(tVFS_Node *Node, char *Name, Uint Flags);
 tVFS_Node	*Ext2_int_CreateNode(tExt2_Disk *Disk, Uint InodeId, char *Name);
 
 // === CODE ===
 /**
- \fn char *Ext2_ReadDir(tVFS_Node *Node, int Pos)
- \brief Reads a directory entry
-*/
+ * \brief Reads a directory entry
+ * \param Node	Directory node
+ * \param Pos	Position of desired element
+ */
 char *Ext2_ReadDir(tVFS_Node *Node, int Pos)
 {
 	tExt2_Inode	inode;
@@ -47,6 +48,7 @@ char *Ext2_ReadDir(tVFS_Node *Node, int Pos)
 	// Get First Block
 	// - Do this ourselves as it is a simple operation
 	Base = inode.i_block[0] * disk->BlockSize;
+	// Scan directory
 	while(Pos -- && size > 0)
 	{
 		VFS_ReadAt( disk->FD, Base+ofs, sizeof(tExt2_DirEnt), &dirent);
@@ -93,12 +95,11 @@ char *Ext2_ReadDir(tVFS_Node *Node, int Pos)
 }
 
 /**
- \fn tVFS_Node *Ext2_FindDir(tVFS_Node *node, char *filename)
- \brief Gets information about a file
- \param node	vfs node - Parent Node
- \param filename	String - Name of file
- \return VFS Node of file
-*/
+ * \brief Gets information about a file
+ * \param Node	Parent Node
+ * \param Filename	Name of wanted file
+ * \return VFS Node of file
+ */
 tVFS_Node *Ext2_FindDir(tVFS_Node *Node, char *Filename)
 {
 	tExt2_Disk	*disk = Node->ImplPtr;
@@ -152,7 +153,22 @@ tVFS_Node *Ext2_FindDir(tVFS_Node *Node, char *Filename)
  */
 int Ext2_MkNod(tVFS_Node *Parent, char *Name, Uint Flags)
 {
-	return 0;
+	tVFS_Node	*child;
+	
+	child = Ext2_int_AllocateNode(Parent, Flags);
+	return Ext2_Link(Parent, child, Name);
+}
+
+/**
+ * \brief Links an existing node to a new name
+ * \param Parent	Parent (directory) node
+ * \param Node	Node to link
+ * \param Name	New name for the node
+ * \return Boolean Failure - See ::tVFS_Node.Link for info
+ */
+int Ext2_Link(tVFS_Node *Parent, tVFS_Node *Node, char *Name)
+{
+	return 1;
 }
 
 // ---- INTERNAL FUNCTIONS ----
-- 
2.20.1