From fd5b59d2271d433bf42e9d5d677435c2ff25e24b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Axel=20D=C3=B6rfler?= <axeld@pinc-software.de>
Date: Tue, 9 Sep 2003 02:12:06 +0000
Subject: [PATCH] Added initial support for file systems. Not tested yet, but
 compiles. New Directory class for use in file systems; file systems need to
 publish their root directory as a subclass of this class.

git-svn-id: file:///srv/svn/repos/haiku/trunk/current@4587 a95241bf-73f2-0310-859d-f6bbb57e9c96
---
 headers/private/kernel/boot/partitions.h | 29 ++++++++++++++++++++----
 headers/private/kernel/boot/vfs.h        | 28 ++++++++++++++++++++++-
 2 files changed, 52 insertions(+), 5 deletions(-)

diff --git a/headers/private/kernel/boot/partitions.h b/headers/private/kernel/boot/partitions.h
index 1921b3cd10..899ded7b42 100644
--- a/headers/private/kernel/boot/partitions.h
+++ b/headers/private/kernel/boot/partitions.h
@@ -11,17 +11,38 @@
 
 
 // DiskDeviceTypes we need/support in the boot loader
-#define kPartitionTypeAmiga "Amiga RDB"
-#define kPartitionTypeIntel "Intel"
+#define kPartitionTypeAmiga		"Amiga RDB"
+#define kPartitionTypeIntel		"Intel"
 #define kPartitionTypeIntelExtended "Intel Extended"
-#define kPartitionTypeApple "Apple"
+#define kPartitionTypeApple		"Apple"
 
-#define kPartitionTypeBFS "BFS"
+#define kPartitionTypeBFS		"BFS Filesystem"
+#define kPartitionTypeAmigaFFS	"AmigaFFS Filesystem"
+#define kPartitionTypeBFS		"BFS Filesystem"
+#define kPartitionTypeEXT2		"EXT2 Filesystem"
+#define kPartitionTypeEXT3		"EXT3 Filesystem"
+#define kPartitionTypeFAT12		"FAT12 Filesystem"
+#define kPartitionTypeFAT32		"FAT32 Filesystem"
+#define kPartitionTypeISO9660	"ISO9660 Filesystem"
+#define kPartitionTypeReiser	"Reiser Filesystem"
+#define kPartitionTypeUDF		"UDF Filesystem"
 
+// structure definitions as used in the boot loader
 struct partition_module_info;
 extern partition_module_info gAmigaPartitionModule;
 extern partition_module_info gIntelPartitionMapModule;
 extern partition_module_info gIntelExtendedPartitionModule;
 extern partition_module_info gApplePartitionModule;
 
+// the file system module info is not a standard module info;
+// their modules are specifically written for the boot loader,
+// and hence, don't need to follow the standard module specs.
+
+struct file_system_module_info {
+	const char	*pretty_name;
+	status_t	(*get_file_system)(Node *device, Directory **_root);
+};
+
+extern file_system_module_info gBFSFileSystemModule;
+
 #endif	/* KERNEL_BOOT_PARTITIONS_H */
diff --git a/headers/private/kernel/boot/vfs.h b/headers/private/kernel/boot/vfs.h
index aac6035899..7a4fa54d97 100644
--- a/headers/private/kernel/boot/vfs.h
+++ b/headers/private/kernel/boot/vfs.h
@@ -8,7 +8,7 @@
 
 #include <SupportDefs.h>
 
-#include <list.h>
+#include <util/list.h>
 #include <boot/stage2_args.h>
 
 
@@ -27,12 +27,36 @@ class Node {
 		virtual ssize_t ReadAt(void *cookie, off_t pos, void *buffer, size_t bufferSize) = 0;
 		virtual ssize_t WriteAt(void *cookie, off_t pos, const void *buffer, size_t bufferSize) = 0;
 
+		virtual status_t GetName(char *nameBuffer, size_t bufferSize) const;
+		virtual int32 Type() const;
+		virtual off_t Size() const;
+
+		status_t Acquire();
+		status_t Release();
+
 	protected:
 		list_link	fLink;
 		int32		fRefCount;
 };
 
 
+class Directory : public Node {
+	public:
+		Directory();
+
+		virtual ssize_t ReadAt(void *cookie, off_t pos, void *buffer, size_t bufferSize);
+		virtual ssize_t WriteAt(void *cookie, off_t pos, const void *buffer, size_t bufferSize);
+
+		virtual int32 Type() const;
+
+		virtual Node *Lookup(const char *name, bool traverseLinks) = 0;
+
+		virtual status_t GetNextNode(void *cookie, Node **_node) = 0;
+		virtual status_t Rewind(void *cookie) = 0;
+
+		virtual status_t AddNode(Node *node);
+};
+
 /** The console based nodes don't need cookies for I/O, they
  *	also don't support to change the stream position.
  *	Live is simple in the boot loader :-)
@@ -46,6 +70,7 @@ class ConsoleNode : public Node {
 		virtual ssize_t Write(const void *buffer, size_t bufferSize);
 };
 
+extern Directory *gRoot;
 
 extern "C" {
 #endif	/* __cplusplus */
@@ -53,6 +78,7 @@ extern "C" {
 extern status_t vfs_init(stage2_args *args);
 extern status_t mount_boot_file_systems();
 extern status_t add_partitions_for(int fd);
+extern int open_node(Node *node, int mode);
 
 #ifdef __cplusplus
 }