X-Git-Url: https://git.ucc.asn.au/?a=blobdiff_plain;f=KernelLand%2FKernel%2Finclude%2Fvfs.h;h=b030627e0c983d2dc6661d72546fd6b0fb20704c;hb=d7dcea0e5a8df0f479e99f168a10b9a9535c7ad6;hp=4be24c383655cb3856b740f081e8204f1802b025;hpb=2015e19b71476d1fee2480aef4de60d22ed5438d;p=tpg%2Facess2.git

diff --git a/KernelLand/Kernel/include/vfs.h b/KernelLand/Kernel/include/vfs.h
index 4be24c38..b030627e 100644
--- a/KernelLand/Kernel/include/vfs.h
+++ b/KernelLand/Kernel/include/vfs.h
@@ -216,6 +216,21 @@ typedef struct sVFS_Node
  * \}
  */
 
+/**
+ * \name tVFS_NodeType.Type flags
+ * \brief Flags for node types
+ * \{
+ */
+//\! Calls to VFS_Write should not generate calls to .Trunctate
+//\! 
+//\! If this flag is set, writing over the end of the file will not call .Truncate automatically
+#define VFS_NODETYPEFLAG_NOAUTOEXPAND	0x001
+//\! Node type describes a stream (offset ignored, seeking disallowed)
+#define VFS_NODETYPEFLAG_STREAM 	0x002
+/**
+ * \}
+ */
+
 /**
  * \brief Functions for a specific node type
  */
@@ -226,6 +241,11 @@ struct sVFS_NodeType
 	 */
 	const char	*TypeName;
 
+	/**
+	 * \brief Flags describing operational quirks
+	 */
+	unsigned int	Flags;
+
 	/**
 	 * \name Common Functions
 	 * \brief Functions that are used no matter the value of .Flags
@@ -293,7 +313,18 @@ struct sVFS_NodeType
 	 * \return Boolean Failure
 	 * \note If NULL, the VFS implements it using .Read
 	 */
-	 int	(*MMap)(struct sVFS_Node *Node, off_t Offset, int Length, void *Dest);
+	 int	(*MMap)(struct sVFS_Node *Node, off_t Offset, size_t Length, void *Dest);
+	
+	/**
+	 * \brief Resize a file
+	 * \param Node	Pointer to this node
+	 * \param NewSize	New file size
+	 * \return Actual new file size
+	 * \note If NULL, \a Write may be called with Offset + Length > Size
+	 *
+	 * Called to increase/decrease the size of a file. If the 
+	 */
+	off_t	(*Truncate)(struct sVFS_Node *Node, off_t NewSize);
 	
 	/**
 	 * \}