X-Git-Url: https://git.ucc.asn.au/?a=blobdiff_plain;f=KernelLand%2FKernel%2Finclude%2Fvfs.h;h=98bc02757cc9b551456e74a25092ad5af722435c;hb=93a6bfbef3c85c3449826d1fbdc9aa08faa1dc20;hp=0977e28cb248b81e48788a44ae9d3c5e19562e27;hpb=dfa46953df4e4c3717fb0fb216b144a787dcde59;p=tpg%2Facess2.git

diff --git a/KernelLand/Kernel/include/vfs.h b/KernelLand/Kernel/include/vfs.h
index 0977e28c..98bc0275 100644
--- a/KernelLand/Kernel/include/vfs.h
+++ b/KernelLand/Kernel/include/vfs.h
@@ -20,6 +20,7 @@
 #define _VFS_H
 
 #include <acess.h>
+#include <mutex.h>
 
 /**
  * \brief Thread list datatype for VFS_Select
@@ -77,7 +78,15 @@ typedef struct sVFS_NodeType	tVFS_NodeType;
  * is unmapped. Nice for read-only files and memory-only files (or 
  * pseudo-readonly filesystems)
  */
-#define VFS_FFLAG_NOWRITEBACK
+#define VFS_FFLAG_NOWRITEBACK	0x1000
+
+/**
+ * \brief "Dirty Metadata" Flag
+ *
+ * Indicates that the node's metadata has been altered since the flag was last
+ * cleared. Tells the driver that it should update the inode at the next flush.
+ */
+#define VFS_FFLAG_DIRTY 	0x8000
 /**
  * \}
  */
@@ -90,6 +99,11 @@ typedef struct sVFS_NodeType	tVFS_NodeType;
  */
 typedef struct sVFS_Node
 {
+	/**
+	 * \brief Functions associated with the node
+	 */
+	tVFS_NodeType	*Type;
+	
 	/**
 	 * \name Identifiers
 	 * \brief Fields used by the driver to identify what data this node
@@ -178,11 +192,6 @@ typedef struct sVFS_Node
 	/**
 	 * \}
 	 */
-	
-	/**
-	 * \brief Functions associated with the node
-	 */
-	tVFS_NodeType	*Type;
 } tVFS_Node;
 
 /**
@@ -339,6 +348,15 @@ typedef struct sVFS_Driver
 	 */
 	Uint	Flags;
 	
+	/**
+	 * \brief Detect if a volume is accessible using this driver
+	 * \return Boolean success (with higher numbers being higher priority)
+	 *
+	 * E.g. FAT would return 1 as it's the lowest common denominator while ext2 might return 2,
+	 * because it can be embedded in a FAT volume (and is a more fully featured filesystem).
+	 */
+	 int	(*Detect)(int FD);
+
 	/**
 	 * \brief Callback to mount a device
 	 */