[PATCH] merge befs file system from 2.4 (no core changes)

fs/Config.help

@@ -963,6 +963,28 @@ CONFIG_VXFS_FS
   module, say M here and read <file:Documentation/modules.txt>.  If
   unsure, say N.
 
+CONFIG_BEFS_FS
+  The BeOS File System (BeFS) is the native file system of Be, Inc's
+  BeOS. Notable features include support for arbitrary attributes
+  on files and directories, and database-like indices on selected
+  attributes. (Also note that this driver doesn't make those features
+  available at this time). It is a 64 bit filesystem, so it supports
+  extreemly large volumes and files.
+
+  If you use this filesystem, you should also say Y to at least one
+  of the NLS (native language support) options below.
+
+  If you don't know what this is about, say N.
+
+  If you want to compile this as a module ( = code which can be
+  inserted in and removed from the running kernel whenever you want),
+  say M here and read Documentation/modules.txt. The module will be
+  called befs.o.
+
+CONFIG_BEFS_DEBUG
+  If you say Y here, you can use the 'debug' mount option to enable
+  debugging output from the driver. 
+
 CIFS (Common Internet File System) support
 CONFIG_CIFS
   This is the client VFS module for the Common Internet File System

fs/Config.in

@@ -24,6 +24,9 @@ dep_tristate 'Amiga FFS file system support (EXPERIMENTAL)' CONFIG_AFFS_FS $CONF
 
 dep_tristate 'Apple Macintosh file system support (EXPERIMENTAL)' CONFIG_HFS_FS $CONFIG_EXPERIMENTAL
 
+dep_tristate 'BeOS file systemv(BeFS) support (read only) (EXPERIMENTAL)' CONFIG_BEFS_FS $CONFIG_EXPERIMENTAL
+dep_mbool '  Debug BeFS' CONFIG_BEFS_DEBUG $CONFIG_BEFS_FS
+
 dep_tristate 'BFS file system support (EXPERIMENTAL)' CONFIG_BFS_FS $CONFIG_EXPERIMENTAL
 
 tristate 'Ext3 journalling file system support' CONFIG_EXT3_FS

fs/Makefile

@@ -87,5 +87,6 @@ obj-$(CONFIG_SUN_OPENPROMFS)	+= openpromfs/
 obj-$(CONFIG_JFS_FS)		+= jfs/
 obj-$(CONFIG_XFS_FS)		+= xfs/
 obj-$(CONFIG_AFS_FS)		+= afs/
+obj-$(CONFIG_BEFS_FS)		+= befs/
 
 include $(TOPDIR)/Rules.make

fs/befs/Makefile

+#
+# Makefile for the linux BeOS filesystem routines.
+#
+# Note! Dependencies are done automagically by 'make dep', which also
+# removes any old dependencies. DON'T put your own dependencies here
+# unless it's something special (ie not a .c file).
+#
+# Note 2! The CFLAGS definitions are now in the main makefile...
+
+ 
+obj-$(CONFIG_BEFS_FS) += befs.o
+
+befs-objs := datastream.o btree.o super.o inode.o debug.o io.o linuxvfs.o
+
+include $(TOPDIR)/Rules.make

fs/befs/TODO

+TODO
+==========
+
+* Convert comments to the Kernel-Doc format.
+
+* Befs_fs.h has gotten big and messy. No reason not to break it up into 
+	smaller peices.
+
+* See if Alexander Viro's option parser made it into the kernel tree. 
+	Use that if we can. (include/linux/parser.h)
+
+* See if we really need separate types for on-disk and in-memory 
+	representations of the superblock and inode.
+

fs/befs/attribute.c

+/*
+ * linux/fs/befs/attribute.c
+ *
+ * Copyright (C) 2002 Will Dyson <will_dyson@pobox.com>
+ *
+ * Many thanks to Dominic Giampaolo, author of "Practical File System
+ * Design with the Be File System", for such a helpful book.
+ *
+ */
+
+#include <linux/fs.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+
+#include "befs.h"
+#include "endian.h"
+
+#define SD_DATA(sd)\
+	(void*)((char*)sd + sizeof(*sd) + (sd->name_size - sizeof(sd->name)))
+
+#define SD_NEXT(sd)\
+	(befs_small_data*)((char*)sd + sizeof(*sd) + (sd->name_size - \
+	sizeof(sd->name) + sd->data_size))
+
+int
+list_small_data(struct super_block *sb, befs_inode * inode, filldir_t filldir);
+
+befs_small_data *
+find_small_data(struct super_block *sb, befs_inode * inode,
+				 const char *name);
+int
+read_small_data(struct super_block *sb, befs_inode * inode,
+		 befs_small_data * sdata, void *buf, size_t bufsize);
+
+/**
+ *
+ *
+ *
+ *
+ *
+ */
+befs_small_data *
+find_small_data(struct super_block *sb, befs_inode * inode, const char *name)
+{
+	befs_small_data *sdata = inode->small_data;
+
+	while (sdata->type != 0) {
+		if (strcmp(name, sdata->name) != 0) {
+			return sdata;
+		}
+		sdata = SD_NEXT(sdata);
+	}
+	return NULL;
+}
+
+/**
+ *
+ *
+ *
+ *
+ *
+ */
+int
+read_small_data(struct super_block *sb, befs_inode * inode,
+		const char *name, void *buf, size_t bufsize)
+{
+	befs_small_data *sdata;
+
+	sdata = find_small_data(sb, inode, name);
+	if (sdata == NULL)
+		return BEFS_ERR;
+	else if (sdata->data_size > bufsize)
+		return BEFS_ERR;
+
+	memcpy(buf, SD_DATA(sdata), sdata->data_size);
+
+	return BEFS_OK;
+}
+
+/**
+ *
+ *
+ *
+ *
+ *
+ */
+int
+list_small_data(struct super_block *sb, befs_inode * inode)
+{
+
+}
+
+/**
+ *
+ *
+ *
+ *
+ *
+ */
+int
+list_attr(struct super_block *sb, befs_inode * inode)
+{
+
+}
+
+/**
+ *
+ *
+ *
+ *
+ *
+ */
+int
+read_attr(struct super_block *sb, befs_inode * inode)
+{
+
+}

fs/befs/befs.h

+/*
+ * befs.h
+ *
+ * Copyright (C) 2001-2002 Will Dyson <will_dyson@pobox.com>
+ * Copyright (C) 1999 Makoto Kato (m_kato@ga2.so-net.ne.jp)
+ */
+
+#ifndef _LINUX_BEFS_H
+#define _LINUX_BEFS_H
+
+#include "befs_fs_types.h"
+
+/* used in debug.c */
+#define BEFS_VERSION "0.9.3"
+
+
+/* Sector_t makes this sillyness obsolete */
+typedef u64 befs_blocknr_t;
+typedef u32 vfs_blocknr_t;
+
+/*
+ * BeFS in memory structures
+ */
+
+typedef struct befs_mount_options {
+	gid_t gid;
+	uid_t uid;
+	int use_gid;
+	int use_uid;
+	int debug;
+	char *iocharset;
+} befs_mount_options;
+
+typedef struct befs_sb_info {
+	u32 magic1;
+	u32 block_size;
+	u32 block_shift;
+	int byte_order;
+	befs_off_t num_blocks;
+	befs_off_t used_blocks;
+	u32 inode_size;
+	u32 magic2;
+
+	/* Allocation group information */
+	u32 blocks_per_ag;
+	u32 ag_shift;
+	u32 num_ags;
+
+	/* jornal log entry */
+	befs_block_run log_blocks;
+	befs_off_t log_start;
+	befs_off_t log_end;
+
+	befs_inode_addr root_dir;
+	befs_inode_addr indices;
+	u32 magic3;
+
+	befs_mount_options mount_opts;
+	struct nls_table *nls;
+
+} befs_sb_info;
+
+typedef struct befs_inode_info {
+	u32 i_flags;
+	u32 i_type;
+
+	befs_inode_addr i_inode_num;
+	befs_inode_addr i_parent;
+	befs_inode_addr i_attribute;
+
+	union {
+		befs_data_stream ds;
+		char symlink[BEFS_SYMLINK_LEN];
+	} i_data;
+
+	struct inode vfs_inode;
+
+} befs_inode_info;
+
+enum befs_err {
+	BEFS_OK,
+	BEFS_ERR,
+	BEFS_BAD_INODE,
+	BEFS_BT_END,
+	BEFS_BT_EMPTY,
+	BEFS_BT_MATCH,
+	BEFS_BT_PARMATCH,
+	BEFS_BT_NOT_FOUND
+};
+
+
+/****************************/
+/* debug.c */
+void befs_error(const struct super_block *sb, const char *fmt, ...);
+void befs_warning(const struct super_block *sb, const char *fmt, ...);
+void befs_debug(const struct super_block *sb, const char *fmt, ...);
+
+void befs_dump_super_block(const struct super_block *sb, befs_super_block *);
+void befs_dump_inode(const struct super_block *sb, befs_inode *);
+void befs_dump_index_entry(const struct super_block *sb, befs_btree_super *);
+void befs_dump_index_node(const struct super_block *sb, befs_btree_nodehead *);
+void befs_dump_inode_addr(const struct super_block *sb, befs_inode_addr);
+/****************************/
+
+
+/* Gets a pointer to the private portion of the super_block
+ * structure from the public part
+ */
+static inline befs_sb_info *
+BEFS_SB(const struct super_block *super)
+{
+	return (befs_sb_info *) super->s_fs_info;
+}
+
+static inline befs_inode_info *
+BEFS_I(const struct inode *inode)
+{
+	return list_entry(inode, struct befs_inode_info, vfs_inode);
+}
+
+static inline befs_blocknr_t
+iaddr2blockno(struct super_block *sb, befs_inode_addr * iaddr)
+{
+	return ((iaddr->allocation_group << BEFS_SB(sb)->ag_shift) +
+		iaddr->start);
+}
+
+static inline befs_inode_addr
+blockno2iaddr(struct super_block *sb, befs_blocknr_t blockno)
+{
+	befs_inode_addr iaddr;
+	iaddr.allocation_group = blockno >> BEFS_SB(sb)->ag_shift;
+	iaddr.start =
+	    blockno - (iaddr.allocation_group << BEFS_SB(sb)->ag_shift);
+	iaddr.len = 1;
+
+	return iaddr;
+}
+
+static inline unsigned int
+befs_iaddrs_per_block(struct super_block *sb)
+{
+	return BEFS_SB(sb)->block_size / sizeof (befs_inode_addr);
+}
+
+static inline int
+befs_iaddr_is_empty(befs_inode_addr * iaddr)
+{
+	return (!iaddr->allocation_group) && (!iaddr->start) && (!iaddr->len);
+}
+
+static inline size_t
+befs_brun_size(struct super_block *sb, befs_block_run run)
+{
+	return BEFS_SB(sb)->block_size * run.len;
+}
+
+#endif				/* _LINUX_BEFS_H */

fs/befs/befs_fs_types.h

+/*
+ * include/linux/befs_fs_types.h
+ *
+ * Copyright (C) 2001 Will Dyson (will@cs.earlham.edu)
+ *
+ *
+ *
+ * from linux/include/linux/befs_fs.h
+ *
+ * Copyright (C) 1999 Makoto Kato (m_kato@ga2.so-net.ne.jp)
+ *
+ */
+
+#ifndef _LINUX_BEFS_FS_TYPES
+#define _LINUX_BEFS_FS_TYPES
+
+#ifdef __KERNEL__
+#include <linux/types.h>
+#endif /*__KERNEL__*/
+
+#define PACKED __attribute__ ((__packed__))
+
+/*
+ * Max name lengths of BFS
+ */
+
+#define BEFS_NAME_LEN 255
+
+#define BEFS_SYMLINK_LEN 144
+#define BEFS_NUM_DIRECT_BLOCKS 12
+#define B_OS_NAME_LENGTH 32
+
+/* The datastream blocks mapped by the double-indirect
+ * block are always 4 fs blocks long.
+ * This eliminates the need for linear searches among
+ * the potentially huge number of indirect blocks
+ *
+ * Err. Should that be 4 fs blocks or 4k???
+ * It matters on large blocksize volumes
+ */
+#define BEFS_DBLINDIR_BRUN_LEN 4
+
+/*
+ * Flags of superblock
+ */
+
+enum super_flags {
+	BEFS_BYTESEX_BE,
+	BEFS_BYTESEX_LE,
+	BEFS_CLEAN = 0x434c454e,
+	BEFS_DIRTY = 0x44495254,
+	BEFS_SUPER_MAGIC1 = 0x42465331,	/* BFS1 */
+	BEFS_SUPER_MAGIC2 = 0xdd121031,
+	BEFS_SUPER_MAGIC3 = 0x15b6830e,
+};
+
+#define BEFS_BYTEORDER_NATIVE 0x42494745
+
+#define BEFS_SUPER_MAGIC BEFS_SUPER_MAGIC1
+
+/*
+ * Flags of inode
+ */
+
+#define BEFS_INODE_MAGIC1 0x3bbe0ad9
+
+enum inode_flags {
+	BEFS_INODE_IN_USE = 0x00000001,
+	BEFS_ATTR_INODE = 0x00000004,
+	BEFS_INODE_LOGGED = 0x00000008,
+	BEFS_INODE_DELETED = 0x00000010,
+	BEFS_LONG_SYMLINK = 0x00000040,
+	BEFS_PERMANENT_FLAG = 0x0000ffff,
+	BEFS_INODE_NO_CREATE = 0x00010000,
+	BEFS_INODE_WAS_WRITTEN = 0x00020000,
+	BEFS_NO_TRANSACTION = 0x00040000,
+};
+/* 
+ * On-Disk datastructures of BeFS
+ */
+
+typedef u64 befs_off_t;
+typedef u64 befs_time_t;
+typedef void befs_binode_etc;
+
+/* Block runs */
+typedef struct {
+	u32 allocation_group;
+	u16 start;
+	u16 len;
+} PACKED befs_block_run;
+
+typedef befs_block_run befs_inode_addr;
+
+/*
+ * The Superblock Structure
+ */
+typedef struct {
+	char name[B_OS_NAME_LENGTH];
+	u32 magic1;
+	u32 fs_byte_order;
+
+	u32 block_size;
+	u32 block_shift;
+
+	befs_off_t num_blocks;
+	befs_off_t used_blocks;
+
+	u32 inode_size;
+
+	u32 magic2;
+	u32 blocks_per_ag;
+	u32 ag_shift;
+	u32 num_ags;
+
+	u32 flags;
+
+	befs_block_run log_blocks;
+	befs_off_t log_start;
+	befs_off_t log_end;
+
+	u32 magic3;
+	befs_inode_addr root_dir;
+	befs_inode_addr indices;
+
+} PACKED befs_super_block;
+
+/* 
+ * Note: the indirect and dbl_indir block_runs may
+ * be longer than one block!
+ */
+typedef struct {
+	befs_block_run direct[BEFS_NUM_DIRECT_BLOCKS];
+	befs_off_t max_direct_range;
+	befs_block_run indirect;
+	befs_off_t max_indirect_range;
+	befs_block_run double_indirect;
+	befs_off_t max_double_indirect_range;
+	befs_off_t size;
+} PACKED befs_data_stream;
+
+/* Attribute */
+typedef struct {
+	u32 type;
+	u16 name_size;
+	u16 data_size;
+	char name[1];
+} PACKED befs_small_data;
+
+/* Inode structure */
+typedef struct {
+	u32 magic1;
+	befs_inode_addr inode_num;
+	u32 uid;
+	u32 gid;
+	u32 mode;
+	u32 flags;
+	befs_time_t create_time;
+	befs_time_t last_modified_time;
+	befs_inode_addr parent;
+	befs_inode_addr attributes;
+	u32 type;
+
+	u32 inode_size;
+	u32 etc;		/* not use */
+
+	union {
+		befs_data_stream datastream;
+		char symlink[BEFS_SYMLINK_LEN];
+	} data;
+
+	u32 pad[4];		/* not use */
+	befs_small_data small_data[1];
+} PACKED befs_inode;
+
+/*
+ * B+tree superblock
+ */
+
+#define BEFS_BTREE_MAGIC 0x69f6c2e8
+
+enum btree_types {
+	BTREE_STRING_TYPE = 0,
+	BTREE_INT32_TYPE = 1,
+	BTREE_UINT32_TYPE = 2,
+	BTREE_INT64_TYPE = 3,
+	BTREE_UINT64_TYPE = 4,
+	BTREE_FLOAT_TYPE = 5,
+	BTREE_DOUBLE_TYPE = 6
+};
+
+typedef struct {
+	u32 magic;
+	u32 node_size;
+	u32 max_depth;
+	u32 data_type;
+	befs_off_t root_node_ptr;
+	befs_off_t free_node_ptr;
+	befs_off_t max_size;
+} PACKED befs_btree_super;
+
+/*
+ * Header stucture of each btree node
+ */
+typedef struct {
+	befs_off_t left;
+	befs_off_t right;
+	befs_off_t overflow;
+	u16 all_key_count;
+	u16 all_key_length;
+} PACKED befs_btree_nodehead;
+
+#endif				/* _LINUX_BEFS_FS_TYPES */

fs/befs/btree.h

+/*
+ * btree.h
+ * 
+ */
+
+
+int befs_btree_find(struct super_block *sb, befs_data_stream * ds,
+		    const char *key, befs_off_t * value);
+
+int befs_btree_read(struct super_block *sb, befs_data_stream * ds,
+		    loff_t key_no, size_t bufsize, char *keybuf,
+		    size_t * keysize, befs_off_t * value);
+

fs/befs/datastream.h

+/*
+ * datastream.h
+ *
+ */
+
+struct buffer_head *befs_read_datastream(struct super_block *sb,
+					 befs_data_stream * ds, befs_off_t pos,
+					 uint * off);
+
+int befs_fblock2brun(struct super_block *sb, befs_data_stream * data,
+		     befs_blocknr_t fblock, befs_block_run * run);
+
+size_t befs_read_lsymlink(struct super_block *sb, befs_data_stream * data,
+			  void *buff, befs_off_t len);
+
+befs_blocknr_t befs_count_blocks(struct super_block *sb, befs_data_stream * ds);
+
+extern const befs_inode_addr BAD_IADDR;
+

fs/befs/debug.c

+/*
+ *  linux/fs/befs/debug.c
+ * 
+ * Copyright (C) 2001 Will Dyson (will_dyson at pobox.com)
+ *
+ * With help from the ntfs-tng driver by Anton Altparmakov
+ *
+ * Copyright (C) 1999  Makoto Kato (m_kato@ga2.so-net.ne.jp)
+ *
+ * debug functions
+ */
+
+#ifdef __KERNEL__
+
+#include <stdarg.h>
+#include <linux/string.h>
+#include <linux/spinlock.h>
+#include <linux/kernel.h>
+#include <linux/fs.h>
+
+#endif				/* __KERNEL__ */
+
+#include "befs.h"
+#include "endian.h"
+
+#define ERRBUFSIZE 1024
+
+void
+befs_error(const struct super_block *sb, const char *fmt, ...)
+{
+	va_list args;
+	char err_buf[ERRBUFSIZE];
+
+	va_start(args, fmt);
+	vsnprintf(err_buf, ERRBUFSIZE, fmt, args);
+	va_end(args);
+
+	printk(KERN_ERR "BeFS(%s): %s\n", sb->s_id, err_buf);
+
+	befs_debug(sb, err_buf);
+}
+
+void
+befs_warning(const struct super_block *sb, const char *fmt, ...)
+{
+	va_list args;
+	char err_buf[ERRBUFSIZE];
+
+	va_start(args, fmt);
+	vsnprintf(err_buf, ERRBUFSIZE, fmt, args);
+	va_end(args);
+
+	printk(KERN_WARNING "BeFS(%s): %s\n", sb->s_id, err_buf);
+
+	befs_debug(sb, err_buf);
+}
+
+void
+befs_debug(const struct super_block *sb, const char *fmt, ...)
+{
+#ifdef CONFIG_BEFS_DEBUG
+
+	va_list args;
+	char err_buf[ERRBUFSIZE];
+
+	if (BEFS_SB(sb)->mount_opts.debug) {
+		va_start(args, fmt);
+		vsnprintf(err_buf, ERRBUFSIZE, fmt, args);
+		va_end(args);
+
+		printk(KERN_DEBUG "BeFS(%s): %s\n", sb->s_id, err_buf);
+	}
+#endif				//CONFIG_BEFS_DEBUG
+}
+
+void
+befs_dump_inode(const struct super_block *sb, befs_inode * inode)
+{
+#ifdef CONFIG_BEFS_DEBUG
+
+	befs_block_run tmp_run;
+
+	befs_debug(sb, "befs_inode infomation");
+
+	befs_debug(sb, "  magic1 %08x", fs32_to_cpu(sb, inode->magic1));
+
+	tmp_run = fsrun_to_cpu(sb, inode->inode_num);
+	befs_debug(sb, "  inode_num %u, %hu, %hu",
+		   tmp_run.allocation_group, tmp_run.start, tmp_run.len);
+
+	befs_debug(sb, "  uid %u", fs32_to_cpu(sb, inode->uid));
+	befs_debug(sb, "  gid %u", fs32_to_cpu(sb, inode->gid));
+	befs_debug(sb, "  mode %08x", fs32_to_cpu(sb, inode->mode));
+	befs_debug(sb, "  flags %08x", fs32_to_cpu(sb, inode->flags));
+	befs_debug(sb, "  create_time %Lu",
+		   fs64_to_cpu(sb, inode->create_time));
+	befs_debug(sb, "  last_modified_time %Lu",
+		   fs64_to_cpu(sb, inode->last_modified_time));
+
+	tmp_run = fsrun_to_cpu(sb, inode->parent);
+	befs_debug(sb, "  parent [%u, %hu, %hu]",
+		   tmp_run.allocation_group, tmp_run.start, tmp_run.len);
+
+	tmp_run = fsrun_to_cpu(sb, inode->attributes);
+	befs_debug(sb, "  attributes [%u, %hu, %hu]",
+		   tmp_run.allocation_group, tmp_run.start, tmp_run.len);
+
+	befs_debug(sb, "  type %08x", fs32_to_cpu(sb, inode->type));
+	befs_debug(sb, "  inode_size %u", fs32_to_cpu(sb, inode->inode_size));
+
+	if (S_ISLNK(inode->mode)) {
+		befs_debug(sb, "  Symbolic link [%s]", inode->data.symlink);
+	} else {
+		int i;
+
+		for (i = 0; i < BEFS_NUM_DIRECT_BLOCKS; i++) {
+			tmp_run =
+			    fsrun_to_cpu(sb, inode->data.datastream.direct[i]);
+			befs_debug(sb, "  direct %d [%u, %hu, %hu]", i,
+				   tmp_run.allocation_group, tmp_run.start,
+				   tmp_run.len);
+		}
+		befs_debug(sb, "  max_direct_range %Lu",
+			   fs64_to_cpu(sb,
+				       inode->data.datastream.
+				       max_direct_range));
+
+		tmp_run = fsrun_to_cpu(sb, inode->data.datastream.indirect);
+		befs_debug(sb, "  indirect [%u, %hu, %hu]",
+			   tmp_run.allocation_group,
+			   tmp_run.start, tmp_run.len);
+
+		befs_debug(sb, "  max_indirect_range %Lu",
+			   fs64_to_cpu(sb,
+				       inode->data.datastream.
+				       max_indirect_range));
+
+		tmp_run =
+		    fsrun_to_cpu(sb, inode->data.datastream.double_indirect);
+		befs_debug(sb, "  double indirect [%u, %hu, %hu]",
+			   tmp_run.allocation_group, tmp_run.start,
+			   tmp_run.len);
+
+		befs_debug(sb, "  max_double_indirect_range %Lu",
+			   fs64_to_cpu(sb,
+				       inode->data.datastream.
+				       max_double_indirect_range));
+
+		befs_debug(sb, "  size %Lu",
+			   fs64_to_cpu(sb, inode->data.datastream.size));
+	}
+
+#endif				//CONFIG_BEFS_DEBUG
+}
+
+/*
+ * Display super block structure for debug.
+ */
+
+void
+befs_dump_super_block(const struct super_block *sb, befs_super_block * sup)
+{
+#ifdef CONFIG_BEFS_DEBUG
+
+	befs_block_run tmp_run;
+
+	befs_debug(sb, "befs_super_block information");
+
+	befs_debug(sb, "  name %s", sup->name);
+	befs_debug(sb, "  magic1 %08x", fs32_to_cpu(sb, sup->magic1));
+	befs_debug(sb, "  fs_byte_order %08x",
+		   fs32_to_cpu(sb, sup->fs_byte_order));
+
+	befs_debug(sb, "  block_size %u", fs32_to_cpu(sb, sup->block_size));
+	befs_debug(sb, "  block_shift %u", fs32_to_cpu(sb, sup->block_shift));
+
+	befs_debug(sb, "  num_blocks %Lu", fs64_to_cpu(sb, sup->num_blocks));
+	befs_debug(sb, "  used_blocks %Lu", fs64_to_cpu(sb, sup->used_blocks));
+
+	befs_debug(sb, "  magic2 %08x", fs32_to_cpu(sb, sup->magic2));
+	befs_debug(sb, "  blocks_per_ag %u",
+		   fs32_to_cpu(sb, sup->blocks_per_ag));
+	befs_debug(sb, "  ag_shift %u", fs32_to_cpu(sb, sup->ag_shift));
+	befs_debug(sb, "  num_ags %u", fs32_to_cpu(sb, sup->num_ags));
+
+	befs_debug(sb, "  flags %08x", fs32_to_cpu(sb, sup->flags));
+
+	tmp_run = fsrun_to_cpu(sb, sup->log_blocks);
+	befs_debug(sb, "  log_blocks %u, %hu, %hu",
+		   tmp_run.allocation_group, tmp_run.start, tmp_run.len);
+
+	befs_debug(sb, "  log_start %Ld", fs64_to_cpu(sb, sup->log_start));
+	befs_debug(sb, "  log_end %Ld", fs64_to_cpu(sb, sup->log_end));
+
+	befs_debug(sb, "  magic3 %08x", fs32_to_cpu(sb, sup->magic3));
+
+	tmp_run = fsrun_to_cpu(sb, sup->root_dir);
+	befs_debug(sb, "  root_dir %u, %hu, %hu",
+		   tmp_run.allocation_group, tmp_run.start, tmp_run.len);
+
+	tmp_run = fsrun_to_cpu(sb, sup->indices);
+	befs_debug(sb, "  indices %u, %hu, %hu",
+		   tmp_run.allocation_group, tmp_run.start, tmp_run.len);
+
+#endif				//CONFIG_BEFS_DEBUG
+}
+
+void
+befs_dump_small_data(const struct super_block *sb, befs_small_data * sd)
+{
+}
+
+void
+befs_dump_run(const struct super_block *sb, befs_block_run run)
+{
+#ifdef CONFIG_BEFS_DEBUG
+
+	run = fsrun_to_cpu(sb, run);
+
+	befs_debug(sb, "[%u, %hu, %hu]",
+		   run.allocation_group, run.start, run.len);
+
+#endif				//CONFIG_BEFS_DEBUG
+}
+
+void
+befs_dump_index_entry(const struct super_block *sb, befs_btree_super * super)
+{
+#ifdef CONFIG_BEFS_DEBUG
+
+	befs_debug(sb, "Btree super structure");
+	befs_debug(sb, "  magic %08x", fs32_to_cpu(sb, super->magic));
+	befs_debug(sb, "  node_size %u", fs32_to_cpu(sb, super->node_size));
+	befs_debug(sb, "  max_depth %08x", fs32_to_cpu(sb, super->max_depth));
+
+	befs_debug(sb, "  data_type %08x", fs32_to_cpu(sb, super->data_type));
+	befs_debug(sb, "  root_node_pointer %016LX",
+		   fs64_to_cpu(sb, super->root_node_ptr));
+	befs_debug(sb, "  free_node_pointer %016LX",
+		   fs64_to_cpu(sb, super->free_node_ptr));
+	befs_debug(sb, "  maximum size %016LX",
+		   fs64_to_cpu(sb, super->max_size));
+
+#endif				//CONFIG_BEFS_DEBUG
+}
+
+void
+befs_dump_index_node(const struct super_block *sb, befs_btree_nodehead * node)
+{
+#ifdef CONFIG_BEFS_DEBUG
+
+	befs_debug(sb, "Btree node structure");
+	befs_debug(sb, "  left %016LX", fs64_to_cpu(sb, node->left));
+	befs_debug(sb, "  right %016LX", fs64_to_cpu(sb, node->right));
+	befs_debug(sb, "  overflow %016LX", fs64_to_cpu(sb, node->overflow));
+	befs_debug(sb, "  all_key_count %hu",
+		   fs16_to_cpu(sb, node->all_key_count));
+	befs_debug(sb, "  all_key_length %hu",
+		   fs16_to_cpu(sb, node->all_key_length));
+
+#endif				//CONFIG_BEFS_DEBUG
+}

fs/befs/endian.h

+/*
+ * linux/fs/befs/endian.h
+ *
+ * Copyright (C) 2001 Will Dyson <will_dyson@pobox.com>
+ *
+ * Partially based on similar funtions in the sysv driver.
+ */
+
+#ifndef LINUX_BEFS_ENDIAN
+#define LINUX_BEFS_ENDIAN
+
+#include <linux/byteorder/generic.h>
+#include "befs.h"
+
+static inline u64
+fs64_to_cpu(const struct super_block *sb, u64 n)
+{
+	if (BEFS_SB(sb)->byte_order == BEFS_BYTESEX_LE)
+		return le64_to_cpu(n);
+	else
+		return be64_to_cpu(n);
+}
+
+static inline u64
+cpu_to_fs64(const struct super_block *sb, u64 n)
+{
+	if (BEFS_SB(sb)->byte_order == BEFS_BYTESEX_LE)
+		return cpu_to_le64(n);
+	else
+		return cpu_to_be64(n);
+}
+
+static inline u32
+fs32_to_cpu(const struct super_block *sb, u32 n)
+{
+	if (BEFS_SB(sb)->byte_order == BEFS_BYTESEX_LE)
+		return le32_to_cpu(n);
+	else
+		return be32_to_cpu(n);
+}
+
+static inline u32
+cpu_to_fs32(const struct super_block *sb, u32 n)
+{
+	if (BEFS_SB(sb)->byte_order == BEFS_BYTESEX_LE)
+		return cpu_to_le32(n);
+	else
+		return cpu_to_be32(n);
+}
+
+static inline u16
+fs16_to_cpu(const struct super_block *sb, u16 n)
+{
+	if (BEFS_SB(sb)->byte_order == BEFS_BYTESEX_LE)
+		return le16_to_cpu(n);
+	else
+		return be16_to_cpu(n);
+}
+
+static inline u16
+cpu_to_fs16(const struct super_block *sb, u16 n)
+{
+	if (BEFS_SB(sb)->byte_order == BEFS_BYTESEX_LE)
+		return cpu_to_le16(n);
+	else
+		return cpu_to_be16(n);
+}
+
+/* Composite types below here */
+
+static inline befs_block_run
+fsrun_to_cpu(const struct super_block *sb, befs_block_run n)
+{
+	befs_block_run run;
+
+	if (BEFS_SB(sb)->byte_order == BEFS_BYTESEX_LE) {
+		run.allocation_group = le32_to_cpu(n.allocation_group);
+		run.start = le16_to_cpu(n.start);
+		run.len = le16_to_cpu(n.len);
+	} else {
+		run.allocation_group = be32_to_cpu(n.allocation_group);
+		run.start = be16_to_cpu(n.start);
+		run.len = be16_to_cpu(n.len);
+	}
+	return run;
+}
+
+static inline befs_block_run
+cpu_to_fsrun(const struct super_block *sb, befs_block_run n)
+{
+	befs_block_run run;
+
+	if (BEFS_SB(sb)->byte_order == BEFS_BYTESEX_LE) {
+		run.allocation_group = cpu_to_le32(n.allocation_group);
+		run.start = cpu_to_le16(n.start);
+		run.len = cpu_to_le16(n.len);
+	} else {
+		run.allocation_group = cpu_to_be32(n.allocation_group);
+		run.start = cpu_to_be16(n.start);
+		run.len = cpu_to_be16(n.len);
+	}
+	return run;
+}
+
+static inline befs_data_stream
+fsds_to_cpu(const struct super_block *sb, befs_data_stream n)
+{
+	befs_data_stream data;
+	int i;
+
+	for (i = 0; i < BEFS_NUM_DIRECT_BLOCKS; ++i)
+		data.direct[i] = fsrun_to_cpu(sb, n.direct[i]);
+
+	data.max_direct_range = fs64_to_cpu(sb, n.max_direct_range);
+	data.indirect = fsrun_to_cpu(sb, n.indirect);
+	data.max_indirect_range = fs64_to_cpu(sb, n.max_indirect_range);
+	data.double_indirect = fsrun_to_cpu(sb, n.double_indirect);
+	data.max_double_indirect_range = fs64_to_cpu(sb,
+						     n.
+						     max_double_indirect_range);
+	data.size = fs64_to_cpu(sb, n.size);
+
+	return data;
+}
+
+#endif				//LINUX_BEFS_ENDIAN

fs/befs/inode.c

+/*
+ * inode.c
+ * 
+ * Copyright (C) 2001 Will Dyson <will_dyson@pobox.com>
+ */
+
+#include <linux/fs.h>
+
+#include "befs.h"
+#include "inode.h"
+#include "endian.h"
+
+/*
+	Validates the correctness of the befs inode
+	Returns BEFS_OK if the inode should be used, otherwise
+	returns BEFS_BAD_INODE
+*/
+int
+befs_check_inode(struct super_block *sb, befs_inode * raw_inode,
+		 befs_blocknr_t inode)
+{
+	u32 magic1 = fs32_to_cpu(sb, raw_inode->magic1);
+	befs_inode_addr ino_num = fsrun_to_cpu(sb, raw_inode->inode_num);
+	u32 flags = fs32_to_cpu(sb, raw_inode->flags);
+
+	/* check magic header. */
+	if (magic1 != BEFS_INODE_MAGIC1) {
+		befs_error(sb,
+			   "Inode has a bad magic header - inode = %lu", inode);
+		return BEFS_BAD_INODE;
+	}
+
+	/*
+	 * Sanity check2: inodes store their own block address. Check it.
+	 */
+	if (inode != iaddr2blockno(sb, &ino_num)) {
+		befs_error(sb, "inode blocknr field disagrees with vfs "
+			   "VFS: %lu, Inode %lu",
+			   inode, iaddr2blockno(sb, &ino_num));
+		return BEFS_BAD_INODE;
+	}
+
+	/*
+	 * check flag
+	 */
+
+	if (!(flags & BEFS_INODE_IN_USE)) {
+		befs_error(sb, "inode is not used - inode = %lu", inode);
+		return BEFS_BAD_INODE;
+	}
+
+	return BEFS_OK;
+}

fs/befs/inode.h

+/*
+ * inode.h
+ * 
+ */
+
+int befs_check_inode(struct super_block *sb, befs_inode * raw_inode,
+		     befs_blocknr_t inode);
+

fs/befs/io.c

+/*
+ * linux/fs/befs/io.c
+ *
+ * Copyright (C) 2001 Will Dyson <will_dyson@pobox.com
+ *
+ * Based on portions of file.c and inode.c 
+ * by Makoto Kato (m_kato@ga2.so-net.ne.jp)
+ *
+ * Many thanks to Dominic Giampaolo, author of Practical File System
+ * Design with the Be File System, for such a helpful book.
+ *
+ */
+
+#include <linux/buffer_head.h>
+
+#include "befs.h"
+#include "io.h"
+
+/*
+ * Converts befs notion of disk addr to a disk offset and uses
+ * linux kernel function sb_bread() to get the buffer containing
+ * the offset. -Will Dyson
+ *
+ */
+
+struct buffer_head *
+befs_bread_iaddr(struct super_block *sb, befs_inode_addr iaddr)
+{
+	struct buffer_head *bh = NULL;
+	befs_blocknr_t block = 0;
+	vfs_blocknr_t vfs_block = 0;
+	befs_sb_info *befs_sb = BEFS_SB(sb);
+
+	befs_debug(sb, "---> Enter befs_read_iaddr() "
+		   "[%u, %hu, %hu]",
+		   iaddr.allocation_group, iaddr.start, iaddr.len);
+
+	if (iaddr.allocation_group > befs_sb->num_ags) {
+		befs_error(sb, "BEFS: Invalid allocation group %u, max is %u",
+			   iaddr.allocation_group, befs_sb->num_ags);
+		goto error;
+	}
+
+	block = iaddr2blockno(sb, &iaddr);
+	vfs_block = (vfs_blocknr_t) block;
+
+	if (vfs_block != block) {
+		befs_error(sb, "Error converting to host blocknr_t. %Lu "
+			   "is larger than the host can use", block);
+		goto error;
+	}
+
+	befs_debug(sb, "befs_read_iaddr: offset = %lu", block);
+
+	bh = sb_bread(sb, vfs_block);
+
+	if (bh == NULL) {
+		befs_error(sb, "Failed to read block %lu", block);
+		goto error;
+	}
+
+	befs_debug(sb, "<--- befs_read_iaddr()");
+	return bh;
+
+      error:
+	befs_debug(sb, "<--- befs_read_iaddr() ERROR");
+	return NULL;
+}
+
+struct buffer_head *
+befs_bread(struct super_block *sb, befs_blocknr_t block)
+{
+	struct buffer_head *bh = NULL;
+	vfs_blocknr_t vfs_block = (vfs_blocknr_t) block;
+
+	befs_debug(sb, "---> Enter befs_read() %Lu", block);
+
+	if (vfs_block != block) {
+		befs_error(sb, "Error converting to host blocknr_t. %Lu "
+			   "is larger than the host can use", block);
+		goto error;
+	}
+
+	bh = sb_bread(sb, vfs_block);
+
+	if (bh == NULL) {
+		befs_error(sb, "Failed to read block %lu", vfs_block);
+		goto error;
+	}
+
+	befs_debug(sb, "<--- befs_read()");
+
+	return bh;
+
+      error:
+	befs_debug(sb, "<--- befs_read() ERROR");
+	return NULL;
+}

fs/befs/io.h

+/*
+ * io.h
+ */
+
+struct buffer_head *befs_bread_iaddr(struct super_block *sb,
+				     befs_inode_addr iaddr);
+
+struct buffer_head *befs_bread(struct super_block *sb, befs_blocknr_t block);
+

fs/befs/super.c

+/*
+ * super.c
+ *
+ * Copyright (C) 2001-2002 Will Dyson <will_dyson@pobox.com>
+ *
+ * Licensed under the GNU GPL. See the file COPYING for details.
+ *
+ */
+
+#include <linux/fs.h>
+
+#include "befs.h"
+#include "super.h"
+#include "endian.h"
+
+/**
+ * load_befs_sb -- Read from disk and properly byteswap all the fields
+ * of the befs superblock
+ *
+ *
+ *
+ *
+ */
+int
+befs_load_sb(struct super_block *sb, befs_super_block * disk_sb)
+{
+	befs_sb_info *befs_sb = BEFS_SB(sb);
+
+	/* Check the byte order of the filesystem */
+	if (le32_to_cpu(disk_sb->fs_byte_order) == BEFS_BYTEORDER_NATIVE)
+	    befs_sb->byte_order = BEFS_BYTESEX_LE;
+	else if (be32_to_cpu(disk_sb->fs_byte_order) == BEFS_BYTEORDER_NATIVE)
+	    befs_sb->byte_order = BEFS_BYTESEX_BE;	
+
+	befs_sb->magic1 = fs32_to_cpu(sb, disk_sb->magic1);
+	befs_sb->magic2 = fs32_to_cpu(sb, disk_sb->magic2);
+	befs_sb->magic3 = fs32_to_cpu(sb, disk_sb->magic3);
+	befs_sb->block_size = fs32_to_cpu(sb, disk_sb->block_size);
+	befs_sb->block_shift = fs32_to_cpu(sb, disk_sb->block_shift);
+	befs_sb->num_blocks = fs64_to_cpu(sb, disk_sb->num_blocks);
+	befs_sb->used_blocks = fs64_to_cpu(sb, disk_sb->used_blocks);
+	befs_sb->inode_size = fs32_to_cpu(sb, disk_sb->inode_size);
+
+	befs_sb->blocks_per_ag = fs32_to_cpu(sb, disk_sb->blocks_per_ag);
+	befs_sb->ag_shift = fs32_to_cpu(sb, disk_sb->ag_shift);
+	befs_sb->num_ags = fs32_to_cpu(sb, disk_sb->num_ags);
+
+	befs_sb->log_blocks = fsrun_to_cpu(sb, disk_sb->log_blocks);
+	befs_sb->log_start = fs64_to_cpu(sb, disk_sb->log_start);
+	befs_sb->log_end = fs64_to_cpu(sb, disk_sb->log_end);
+
+	befs_sb->root_dir = fsrun_to_cpu(sb, disk_sb->root_dir);
+	befs_sb->indices = fsrun_to_cpu(sb, disk_sb->indices);
+	befs_sb->nls = NULL;
+
+	return BEFS_OK;
+}
+
+int
+befs_check_sb(struct super_block *sb)
+{
+	befs_sb_info *befs_sb = BEFS_SB(sb);
+
+	/* Check magic headers of super block */
+	if ((befs_sb->magic1 != BEFS_SUPER_MAGIC1)
+	    || (befs_sb->magic2 != BEFS_SUPER_MAGIC2)
+	    || (befs_sb->magic3 != BEFS_SUPER_MAGIC3)) {
+		befs_error(sb, "invalid magic header");
+		return BEFS_ERR;
+	}
+
+	/*
+	 * Check blocksize of BEFS.
+	 *
+	 * Blocksize of BEFS is 1024, 2048, 4096 or 8192.
+	 */
+
+	if ((befs_sb->block_size != 1024)
+	    && (befs_sb->block_size != 2048)
+	    && (befs_sb->block_size != 4096)
+	    && (befs_sb->block_size != 8192)) {
+		befs_error(sb, "invalid blocksize: %u", befs_sb->block_size);
+		return BEFS_ERR;
+	}
+
+	if (befs_sb->block_size > PAGE_SIZE) {
+		befs_error(sb, "blocksize(%u) cannot be larger"
+			   "than system pagesize(%lu)", befs_sb->block_size,
+			   PAGE_SIZE);
+		return BEFS_ERR;
+	}
+
+	/*
+	   * block_shift and block_size encode the same information
+	   * in different ways as a consistency check.
+	 */
+
+	if ((1 << befs_sb->block_shift) != befs_sb->block_size) {
+		befs_error(sb, "block_shift disagrees with block_size. "
+			   "Corruption likely.");
+		return BEFS_ERR;
+	}
+
+	if (befs_sb->log_start != befs_sb->log_end) {
+		befs_error(sb, "Filesystem not clean! There are blocks in the "
+			   "journal. You must boot into BeOS and mount this volume "
+			   "to make it clean.");
+		return BEFS_ERR;
+	}
+
+	return BEFS_OK;
+}

fs/befs/super.h

+/*
+ * super.h
+ */
+
+int befs_load_sb(struct super_block *sb, befs_super_block * disk_sb);
+
+int befs_check_sb(struct super_block *sb);
+

fs/nls/Config.in

@@ -12,7 +12,8 @@ fi
 # msdos and Joliet want NLS
 if [ "$CONFIG_JOLIET" = "y" -o "$CONFIG_FAT_FS" != "n" \
 	-o "$CONFIG_NTFS_FS" != "n" -o "$CONFIG_NCPFS_NLS" = "y" \
-	-o "$CONFIG_SMB_NLS" = "y" -o "$CONFIG_JFS_FS" != "n" -o "$CONFIG_CIFS" != "n" ]; then
+	-o "$CONFIG_SMB_NLS" = "y" -o "$CONFIG_JFS_FS" != "n" \
+	-o "$CONFIG_CIFS" != "n" -o "$CONFIG_BEFS_FS" != "n" ]; then
   define_bool CONFIG_NLS y
 else
   define_bool CONFIG_NLS n