Re: UFS support

[Marco Gerards <metgerards@student.han.nl>]

Marco Gerards <metgerards@student.han.nl> writes:

> I am working on UFS/UFS2 support for GRUB 2 (and it is almost
> finished).  After that I will work on some other filesystems:

Here it is.

It supports both UFS and UFS2.  I will commit it on Sunday, so please
review it before Sunday if you want to check it.

Thanks,
Marco

2004-05-21  Marco Gerards  <metgerards@student.han.nl>

	* conf/i386-pc.rmk (grub_setup_SOURCES): Add fs/ufs.c
	(grub_emu_SOURCES): Likewise.
	(pkgdata_MODULES): Add ufs.mod.
	(ufs_mod_SOURCES): New variable.
	(ufs_mod_CFLAGS): Likewise.
	* fs/ufs.c: New file.
	* include/grub/fs.h (grub_ufs_init): New prototype.
	(grub_ufs_fini): Likewise.
	* util/grub-emu.c (main): Initialize and deinitialize UFS.


Index: conf/i386-pc.rmk
===================================================================
RCS file: /cvsroot/grub/grub2/conf/i386-pc.rmk,v
retrieving revision 1.13
diff -u -p -u -p -r1.13 i386-pc.rmk
--- conf/i386-pc.rmk	4 Apr 2004 13:46:00 -0000	1.13
+++ conf/i386-pc.rmk	20 May 2004 22:09:47 -0000
@@ -56,7 +56,7 @@ grub_mkimage_LDFLAGS = -llzo
 grub_setup_SOURCES = util/i386/pc/grub-setup.c util/i386/pc/biosdisk.c \
 	util/misc.c util/i386/pc/getroot.c kern/device.c kern/disk.c \
 	kern/err.c kern/misc.c disk/i386/pc/partition.c fs/fat.c fs/ext2.c \
-	kern/file.c kern/fs.c kern/env.c
+	fs/ufs.c kern/file.c kern/fs.c kern/env.c
 
 # For grub
 grub_emu_SOURCES = kern/main.c kern/device.c				\
@@ -64,7 +64,7 @@ grub_emu_SOURCES = kern/main.c kern/devi
         kern/misc.c kern/loader.c kern/rescue.c kern/term.c		\
 	disk/i386/pc/partition.c kern/env.c commands/ls.c		\
 	commands/terminal.c commands/boot.c commands/cmp.c commands/cat.c		\
-	util/i386/pc/biosdisk.c fs/fat.c fs/ext2.c			\
+	util/i386/pc/biosdisk.c fs/fat.c fs/ext2.c fs/ufs.c			\
 	normal/cmdline.c normal/command.c normal/main.c normal/menu.c normal/arg.c	\
 	util/console.c util/grub-emu.c util/misc.c util/i386/pc/getroot.c
 grub_emu_LDFLAGS = -lncurses
@@ -73,7 +73,7 @@ grub_emu_LDFLAGS = -lncurses
 genmoddep_SOURCES = util/genmoddep.c
 
 # Modules.
-pkgdata_MODULES = _chain.mod _linux.mod fat.mod ext2.mod normal.mod hello.mod \
+pkgdata_MODULES = _chain.mod _linux.mod fat.mod ufs.mod ext2.mod normal.mod hello.mod \
 	 vga.mod font.mod _multiboot.mod ls.mod boot.mod cmp.mod cat.mod terminal.mod
 
 # For _chain.mod.
@@ -87,6 +87,10 @@ fat_mod_CFLAGS = $(COMMON_CFLAGS)
 # For ext2.mod.
 ext2_mod_SOURCES = fs/ext2.c
 ext2_mod_CFLAGS = $(COMMON_CFLAGS)
+
+# For ufs.mod.
+ufs_mod_SOURCES = fs/ufs.c
+ufs_mod_CFLAGS = $(COMMON_CFLAGS)
 
 # For _linux.mod.
 _linux_mod_SOURCES = loader/i386/pc/linux.c
Index: fs/ufs.c
===================================================================
RCS file: fs/ufs.c
diff -N fs/ufs.c
--- /dev/null	1 Jan 1970 00:00:00 -0000
+++ fs/ufs.c	20 May 2004 22:09:47 -0000
@@ -0,0 +1,690 @@
+/* ufs.c - Unix File System */
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2004  Free Software Foundation, Inc.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <grub/err.h>
+#include <grub/file.h>
+#include <grub/mm.h>
+#include <grub/misc.h>
+#include <grub/disk.h>
+#include <grub/dl.h>
+#include <grub/types.h>
+
+
+#define GRUB_UFS_MAGIC		0x11954
+#define GRUB_UFS2_MAGIC		0x19540119
+#define GRUB_UFS_INODE		2
+#define GRUB_UFS_FILETYPE_DIR	4
+#define GRUB_UFS_FILETYPE_LNK	10
+#define GRUB_UFS_MAX_SYMLNK_CNT	8
+
+#define GRUB_UFS_DIRBLKS	12
+#define GRUB_UFS_INDIRBLKS	3
+
+#define GRUB_UFS_ATTR_DIR	040000
+
+/* Calculate in which group the inode can be found.  */
+#define inode_group(inode,sblock) ()
+
+#define UFS_BLKSZ(sblock) (grub_le_to_cpu32 (sblock->bsize))
+
+#define INODE(data,field) (data->ufs_type == UFS1 ? \
+                           data->inode.  field : data->inode2.  field)
+#define INODE_ENDIAN(data,field,bits1,bits2) (data->ufs_type == UFS1 ? \
+                           grub_le_to_cpu##bits1 (data->inode.field) : \
+                           grub_le_to_cpu##bits2 (data->inode2.field))
+#define INODE_SIZE(data) INODE_ENDIAN (data,size,32,64)
+#define INODE_MODE(data) INODE_ENDIAN (data,mode,16,16)
+#define INODE_BLKSZ(data) (data->ufs_type == UFS1 ? 32 : 64)
+#define INODE_DIRBLOCKS(data,blk) INODE_ENDIAN \
+                                   (data,blocks.dir_blocks[blk],32,64)
+#define INODE_INDIRBLOCKS(data,blk) INODE_ENDIAN \
+                                     (data,blocks.indir_blocks[blk],32,64)
+
+/* The blocks on which the superblock can be found.  */
+static int sblocklist[] = { 128, 16, 0, 512, -1 };
+
+struct grub_ufs_sblock
+{
+  grub_uint8_t unused[16];
+  /* The offset of the inodes in the cylinder group.  */
+  grub_uint32_t inoblk_offs;
+  
+  grub_uint8_t unused2[4];
+  
+  /* The start of the cylinder group.  */
+  grub_uint32_t cylg_offset;
+  
+  grub_uint8_t unused3[20];
+  
+  /* The size of a block in bytes.  */
+  grub_int32_t bsize;
+  grub_uint8_t unused4[48];
+  
+  /* The size of filesystem blocks to disk blocks.  */
+  grub_uint32_t log2_blksz;
+  grub_uint8_t unused5[80];
+  
+  /* Inodes stored per cylinder group.  */
+  grub_uint32_t ino_per_group;
+  
+  /* The frags per cylinder group.  */
+  grub_uint32_t frags_per_group;
+  
+  grub_uint8_t unused7[1180];
+  
+  /* Magic value to check if this is really a UFS filesystem.  */
+  grub_uint32_t magic;
+};
+
+/* UFS inode.  */
+struct grub_ufs_inode
+{
+  grub_uint16_t mode;
+  grub_uint16_t nlinks;
+  grub_uint16_t uid;
+  grub_uint16_t gid;
+  grub_int64_t size;
+  grub_uint64_t atime;
+  grub_uint64_t mtime;
+  grub_uint64_t ctime;
+  union
+  {
+    struct
+    {
+      grub_uint32_t dir_blocks[GRUB_UFS_DIRBLKS];
+      grub_uint32_t indir_blocks[GRUB_UFS_INDIRBLKS];
+    } blocks;
+    grub_uint8_t symlink[(GRUB_UFS_DIRBLKS + GRUB_UFS_INDIRBLKS) * 4];
+  };
+  grub_uint32_t flags;
+  grub_uint32_t nblocks;
+  grub_uint32_t gen;
+  grub_uint32_t unused;
+  grub_uint8_t pad[12];
+};
+
+/* UFS inode.  */
+struct grub_ufs2_inode
+{
+  grub_uint16_t mode;
+  grub_uint16_t nlinks;
+  grub_uint32_t uid;
+  grub_uint32_t gid;
+  grub_uint32_t blocksize;
+  grub_int64_t size;
+  grub_int64_t nblocks;
+  grub_uint64_t atime;
+  grub_uint64_t mtime;
+  grub_uint64_t ctime;
+  grub_uint64_t create_time;
+  grub_uint32_t atime_sec;
+  grub_uint32_t mtime_sec;
+  grub_uint32_t ctime_sec;
+  grub_uint32_t create_time_sec;
+  grub_uint32_t gen;
+  grub_uint32_t kernel_flags;
+  grub_uint32_t flags;
+  grub_uint32_t extsz;
+  grub_uint64_t ext[2];
+  union
+  {
+    struct
+    {
+      grub_uint64_t dir_blocks[GRUB_UFS_DIRBLKS];
+      grub_uint64_t indir_blocks[GRUB_UFS_INDIRBLKS];
+    } blocks;
+    grub_uint8_t symlink[(GRUB_UFS_DIRBLKS + GRUB_UFS_INDIRBLKS) * 8];
+  };
+
+  grub_uint8_t unused[24];
+};
+
+/* Directory entry.  */
+struct grub_ufs_dirent
+{
+  grub_uint32_t ino;
+  grub_uint16_t direntlen;
+  grub_uint8_t filetype;
+  grub_uint8_t namelen;
+};
+
+/* Information about a "mounted" ufs filesystem.  */
+struct grub_ufs_data
+{
+  struct grub_ufs_sblock sblock;
+  grub_disk_t disk;
+  union
+  {
+    struct grub_ufs_inode inode;
+    struct grub_ufs2_inode inode2;
+  };
+  enum
+    {
+      UFS1,
+      UFS2,
+      UNKNOWN
+    } ufs_type;
+  int ino;
+  int linknest;
+};
+
+#ifndef GRUB_UTIL
+static grub_dl_t my_mod;
+#endif
+\f
+/* Forward declaration.  */
+static grub_err_t grub_ufs_find_file (struct grub_ufs_data *data,
+				      const char *path);
+
+
+static int
+grub_ufs_get_file_block (struct grub_ufs_data *data, unsigned int blk)
+{
+  struct grub_ufs_sblock *sblock = &data->sblock;
+  unsigned int indirsz;
+  
+  /* Direct.  */
+  if (blk < GRUB_UFS_DIRBLKS)
+    return INODE_DIRBLOCKS (data, blk);
+  
+  blk -= GRUB_UFS_DIRBLKS;
+  
+  indirsz = UFS_BLKSZ (sblock) / INODE_BLKSZ (data);
+  /* Single indirect block.  */
+  if (blk < indirsz)
+    {
+      grub_uint32_t indir[UFS_BLKSZ (sblock)];
+      grub_disk_read (data->disk, INODE_INDIRBLOCKS (data, 0),
+		      0, sizeof (indir), (char *) indir);
+      return indir[blk];
+    }
+  blk -= indirsz;
+  
+  /* Double indirect block.  */
+  if (blk < UFS_BLKSZ (sblock) / indirsz)
+    {
+      grub_uint32_t indir[UFS_BLKSZ (sblock)];
+      
+      grub_disk_read (data->disk, INODE_INDIRBLOCKS (data, 1),
+		      0, sizeof (indir), (char *) indir);
+      grub_disk_read (data->disk,  indir[blk / indirsz],
+		      0, sizeof (indir), (char *) indir);
+      
+      return indir[blk % indirsz];
+    }
+
+
+  grub_error (GRUB_ERR_NOT_IMPLEMENTED_YET,
+	      "ufs does not support tripple indirect blocks");
+  return 0;
+}
+
+
+/* Read LEN bytes from the file described by DATA starting with byte
+   POS.  Return the amount of read bytes in READ.  */
+static grub_ssize_t
+grub_ufs_read_file (struct grub_ufs_data *data,
+		    void (*read_hook) (unsigned long sector,
+				       unsigned offset, unsigned length),
+		    int pos, unsigned int len, char *buf)
+{
+  struct grub_ufs_sblock *sblock = &data->sblock;
+  int i;
+  int blockcnt;
+
+  /* Adjust len so it we can't read past the end of the file.  */
+  if (len > INODE_SIZE (data))
+    len = INODE_SIZE (data);
+
+  blockcnt = (len + pos + UFS_BLKSZ (sblock) - 1) / UFS_BLKSZ (sblock);
+  
+  for (i = pos / UFS_BLKSZ (sblock); i < blockcnt; i++)
+    {
+      int blknr;
+      int blockoff = pos % UFS_BLKSZ (sblock);
+      int blockend = UFS_BLKSZ (sblock);
+      
+      int skipfirst = 0;
+      
+      blknr = grub_ufs_get_file_block (data, i);
+      if (grub_errno)
+	return -1;
+      
+      /* Last block.  */
+      if (i == blockcnt - 1)
+	{
+	  blockend = (len + pos) % UFS_BLKSZ (sblock);
+	  
+	  if (!blockend)
+	    blockend = UFS_BLKSZ (sblock);
+	}
+      
+      /* First block.  */
+      if (i == (pos / (int) UFS_BLKSZ (sblock)))
+	{
+	  skipfirst = blockoff;
+	  blockend -= skipfirst;
+	}
+      
+      /* XXX: If the block number is 0 this block is not stored on
+	 disk but is zero filled instead.  */
+      if (blknr)
+	{
+	  data->disk->read_hook = read_hook;
+	  grub_disk_read (data->disk,
+			  blknr << grub_le_to_cpu32 (data->sblock.log2_blksz),
+			  skipfirst, blockend, buf);
+	  data->disk->read_hook = 0;
+	  if (grub_errno)
+	    return -1;
+	}
+      else
+	grub_memset (buf, UFS_BLKSZ (sblock) - skipfirst, 0);
+
+      buf += UFS_BLKSZ (sblock) - skipfirst;
+    }
+  
+  return len;
+}
+
+
+/* Read inode INO from the mounted filesystem described by DATA.  This
+   inode is used by default now.  */
+static grub_err_t
+grub_ufs_read_inode (struct grub_ufs_data *data, int ino)
+{
+  struct grub_ufs_sblock *sblock = &data->sblock;
+  
+  /* Determine the group the inode is in.  */
+  int group = ino / grub_le_to_cpu32 (sblock->ino_per_group);
+  
+  /* Determine the inode within the group.  */
+  int grpino = ino % grub_le_to_cpu32 (sblock->ino_per_group);
+  
+  /* The first block of the group.  */
+  int grpblk = group * (grub_le_to_cpu32 (sblock->frags_per_group));
+  
+  if (data->ufs_type == UFS1)
+    {
+      struct grub_ufs_inode *inode = &data->inode;
+      
+      grub_disk_read (data->disk,
+		      (((grub_le_to_cpu32 (sblock->inoblk_offs) + grpblk)
+			<< grub_le_to_cpu32 (data->sblock.log2_blksz)))
+		      + grpino / 4,
+		      (grpino % 4) * sizeof (struct grub_ufs_inode),
+		      sizeof (struct grub_ufs_inode),
+		      (char *) inode);
+    }
+  else
+    {
+      struct grub_ufs2_inode *inode = &data->inode2;
+      
+      grub_disk_read (data->disk,
+		      (((grub_le_to_cpu32 (sblock->inoblk_offs) + grpblk)
+			<< grub_le_to_cpu32 (data->sblock.log2_blksz)))
+		      + grpino / 2,
+		      (grpino % 2) * sizeof (struct grub_ufs2_inode),
+		      sizeof (struct grub_ufs2_inode),
+		      (char *) inode);
+    }
+  
+  data->ino = ino;
+  return grub_errno;
+}
+
+
+/* Lookup the symlink the current inode points to.  INO is the inode
+   number of the directory the symlink is relative to.  */
+static grub_err_t
+grub_ufs_lookup_symlink (struct grub_ufs_data *data, int ino)
+{
+  char symlink[INODE_SIZE (data)];
+  
+  if (++data->linknest > GRUB_UFS_MAX_SYMLNK_CNT)
+    return grub_error (GRUB_ERR_SYMLINK_LOOP, "too deep nesting of symlinks");
+  
+  if (INODE_SIZE (data) < (GRUB_UFS_DIRBLKS + GRUB_UFS_INDIRBLKS
+			  * INODE_BLKSZ (data)))
+    grub_strcpy (symlink, INODE (data, symlink));
+  else
+    {
+      grub_disk_read (data->disk, 
+		      (INODE_DIRBLOCKS (data, 0) 
+		       << grub_le_to_cpu32 (data->sblock.log2_blksz)),
+		      0, INODE_SIZE (data), symlink);
+      symlink[INODE_SIZE (data)] = '\0';
+    }
+
+  /* The symlink is an absolute path, go back to the root inode.  */
+  if (symlink[0] == '/')
+    ino = GRUB_UFS_INODE;
+  
+  /* Now load in the old inode.  */
+  if (grub_ufs_read_inode (data, ino))
+    return grub_errno;
+  
+  grub_ufs_find_file (data, symlink);
+  if (grub_errno)
+    grub_error (grub_errno, "Can not follow symlink `%s'.", symlink);
+  
+  return grub_errno;
+}
+
+
+/* Find the file with the pathname PATH on the filesystem described by
+   DATA.  */
+static grub_err_t
+grub_ufs_find_file (struct grub_ufs_data *data, const char *path)
+{
+  char fpath[grub_strlen (path)];
+  char *name = fpath;
+  char *next;
+  unsigned int pos = 0;
+  int dirino;
+  
+  grub_strncpy (fpath, path, grub_strlen (path));
+  
+  /* Skip the first slash.  */
+  if (name[0] == '/')
+    {
+      name++;
+      if (!*name)
+	return 0;
+    }
+
+  /* Extract the actual part from the pathname.  */
+  next = grub_strchr (name, '/');
+  if (next)
+    {
+      next[0] = '\0';
+      next++;
+    }
+  
+  do
+    {
+      struct grub_ufs_dirent dirent;
+      
+      if (grub_strlen (name) == 0)
+	return GRUB_ERR_NONE;
+      
+      if (grub_ufs_read_file (data, 0, pos, sizeof (dirent),
+			      (char *) &dirent) < 0)
+	return grub_errno;
+      
+      {
+	char filename[dirent.namelen + 1];
+
+	if (grub_ufs_read_file (data, 0, pos + sizeof (dirent),
+				dirent.namelen, filename) < 0)
+	  return grub_errno;
+	
+	filename[dirent.namelen] = '\0';
+	
+	if (!grub_strcmp (name, filename))
+	  {
+	    dirino = data->ino;
+	    grub_ufs_read_inode (data, grub_le_to_cpu32 (dirent.ino));
+	    
+	    if (dirent.filetype == GRUB_UFS_FILETYPE_LNK)
+	      {
+		grub_ufs_lookup_symlink (data, dirino);
+		if (grub_errno)
+		  return grub_errno;
+	      }
+
+	    if (!next)
+	      return 0;
+
+	    pos = 0;
+
+	    name = next;
+	    next = grub_strchr (name, '/');
+	    if (next)
+	      {
+		next[0] = '\0';
+		next++;
+	      }
+	    
+	    if (!(dirent.filetype & GRUB_UFS_FILETYPE_DIR))
+	      return grub_error (GRUB_ERR_BAD_FILE_TYPE, "not a directory");
+	    
+	    continue;
+	  }
+      }
+      
+      pos += grub_le_to_cpu16 (dirent.direntlen);
+    } while (pos < grub_le_to_cpu32 (INODE_SIZE (data)));
+  
+  grub_error (GRUB_ERR_FILE_NOT_FOUND, "file not found");
+  return grub_errno;
+}
+
+
+/* Mount the filesystem on the disk DISK.  */
+static struct grub_ufs_data *
+grub_ufs_mount (grub_disk_t disk)
+{
+  struct grub_ufs_data *data;
+  int *sblklist = sblocklist;
+  
+  data = grub_malloc (sizeof (struct grub_ufs_data));
+  if (!data)
+    return 0;
+  
+  /* Find a UFS1 or UFS2 sblock.  */
+  data->ufs_type = UNKNOWN;
+  while (*sblklist != -1)
+    {
+      grub_disk_read (disk, *sblklist, 0, sizeof (struct grub_ufs_sblock),
+		      (char *) &data->sblock);
+      if (grub_errno)
+	goto fail;
+      
+      if (grub_le_to_cpu32 (data->sblock.magic) == GRUB_UFS_MAGIC)
+	{
+	  data->ufs_type = UFS1;
+	  break;
+	}
+      else if (grub_le_to_cpu32 (data->sblock.magic) == GRUB_UFS2_MAGIC)
+	{
+	  data->ufs_type = UFS2;
+	  break;
+	}
+      sblklist++;
+    }
+  if (data->ufs_type == UNKNOWN)
+    {
+      grub_error (GRUB_ERR_BAD_FS, "not an ufs filesystem");
+      goto fail;
+    }
+
+  data->disk = disk;
+  data->linknest = 0;
+  return data;
+
+ fail:
+  grub_free (data);
+  return 0;
+}
+
+
+static grub_err_t
+grub_ufs_dir (grub_device_t device, const char *path, 
+	       int (*hook) (const char *filename, int dir))
+{
+  struct grub_ufs_data *data;
+  struct grub_ufs_sblock *sblock;
+  unsigned int pos = 0;
+
+  data = grub_ufs_mount (device->disk);
+  if (!data)
+    return grub_errno;
+  
+  grub_ufs_read_inode (data, GRUB_UFS_INODE);
+  if (grub_errno)
+    return grub_errno;
+  
+  sblock = &data->sblock;
+  
+  if (!path || path[0] != '/')
+    {
+      grub_error (GRUB_ERR_BAD_FILENAME, "bad filename");
+      return grub_errno;
+    }
+  
+  grub_ufs_find_file (data, path);
+  if (grub_errno)
+    goto fail;  
+  
+  if (!(INODE_MODE (data) & GRUB_UFS_ATTR_DIR))
+    {
+      grub_error (GRUB_ERR_BAD_FILE_TYPE, "not a directory");
+      goto fail;
+    }
+  
+  while (pos < INODE_SIZE (data))
+    {
+      struct grub_ufs_dirent dirent;
+      
+      if (grub_ufs_read_file (data, 0, pos, sizeof (dirent),
+			      (char *) &dirent) < 0)
+	break;
+      
+      {
+	char filename[dirent.namelen + 1];
+	
+	if (grub_ufs_read_file (data, 0, pos + sizeof (dirent),
+				dirent.namelen, filename) < 0)
+	  break;
+	
+	filename[dirent.namelen] = '\0';
+	if (hook (filename, dirent.filetype == GRUB_UFS_FILETYPE_DIR))
+	  break;
+      }
+      
+      pos += grub_le_to_cpu16 (dirent.direntlen);
+    }
+
+ fail:
+  grub_free (data);
+
+  return grub_errno;
+}
+
+
+/* Open a file named NAME and initialize FILE.  */
+static grub_err_t
+grub_ufs_open (struct grub_file *file, const char *name)
+{
+  struct grub_ufs_data *data;
+  data = grub_ufs_mount (file->device->disk);
+  if (!data)
+    return grub_errno;
+  
+  grub_ufs_read_inode (data, 2);
+  if (grub_errno)
+    {
+      grub_free (data);
+      return grub_errno;
+    }
+    
+  if (!name || name[0] != '/')
+    {
+      grub_error (GRUB_ERR_BAD_FILENAME, "bad filename");
+      return grub_errno;
+    }
+  
+  grub_ufs_find_file (data, name);
+  if (grub_errno)
+    {
+      grub_free (data);
+      return grub_errno;
+    }
+  
+  file->data = data;
+  file->size = INODE_SIZE (data);
+
+  return GRUB_ERR_NONE;
+}
+
+
+static grub_ssize_t
+grub_ufs_read (grub_file_t file, char *buf, grub_ssize_t len)
+{
+  struct grub_ufs_data *data = 
+    (struct grub_ufs_data *) file->data;
+  
+  return grub_ufs_read_file (data, file->read_hook, file->offset, len, buf);
+}
+
+
+static grub_err_t
+grub_ufs_close (grub_file_t file)
+{
+  grub_free (file->data);
+  
+  return GRUB_ERR_NONE;
+}
+
+
+static grub_err_t
+grub_ufs_label (grub_device_t device __attribute ((unused)),
+		char **label __attribute ((unused)))
+{
+  return GRUB_ERR_NONE;
+}
+
+\f
+static struct grub_fs grub_ufs_fs =
+  {
+    .name = "ufs",
+    .dir = grub_ufs_dir,
+    .open = grub_ufs_open,
+    .read = grub_ufs_read,
+    .close = grub_ufs_close,
+    .label = grub_ufs_label,
+    .next = 0
+  };
+
+#ifdef GRUB_UTIL
+void
+grub_ufs_init (void)
+{
+  grub_fs_register (&grub_ufs_fs);
+}
+
+void
+grub_ufs_fini (void)
+{
+  grub_fs_unregister (&grub_ufs_fs);
+}
+#else /* ! GRUB_UTIL */
+GRUB_MOD_INIT
+{
+  grub_fs_register (&grub_ufs_fs);
+  my_mod = mod;
+}
+
+GRUB_MOD_FINI
+{
+  grub_fs_unregister (&grub_ufs_fs);
+}
+#endif /* ! GRUB_UTIL */
Index: include/grub/fs.h
===================================================================
RCS file: /cvsroot/grub/grub2/include/grub/fs.h,v
retrieving revision 1.6
diff -u -p -u -p -r1.6 fs.h
--- include/grub/fs.h	4 Apr 2004 13:46:00 -0000	1.6
+++ include/grub/fs.h	20 May 2004 22:09:47 -0000
@@ -1,7 +1,7 @@
 /* fs.h - filesystem manager */
 /*
  *  GRUB  --  GRand Unified Bootloader
- *  Copyright (C) 2002,2003  Free Software Foundation, Inc.
+ *  Copyright (C) 2002,2003,2004  Free Software Foundation, Inc.
  *
  *  GRUB is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
@@ -70,6 +70,8 @@ void grub_fat_init (void);
 void grub_fat_fini (void);
 void grub_ext2_init (void);
 void grub_ext2_fini (void);
+void grub_ufs_init (void);
+void grub_ufs_fini (void);
 #endif /* GRUB_UTIL */
 
 #endif /* ! GRUB_FS_HEADER */
Index: util/grub-emu.c
===================================================================
RCS file: /cvsroot/grub/grub2/util/grub-emu.c,v
retrieving revision 1.4
diff -u -p -u -p -r1.4 grub-emu.c
--- util/grub-emu.c	4 Apr 2004 13:46:03 -0000	1.4
+++ util/grub-emu.c	20 May 2004 22:09:49 -0000
@@ -1,6 +1,6 @@
 /*
  *  GRUB  --  GRand Unified Bootloader
- *  Copyright (C) 2003  Free Software Foundation, Inc.
+ *  Copyright (C) 2003, 2004  Free Software Foundation, Inc.
  *
  *  GRUB is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
@@ -158,6 +158,7 @@ main (int argc, char *argv[])
   /* Initialize the default modules.  */
   grub_fat_init ();
   grub_ext2_init ();
+  grub_ufs_init ();
   grub_ls_init ();
   grub_boot_init ();
   grub_cmp_init ();
@@ -173,6 +174,7 @@ main (int argc, char *argv[])
   grub_util_biosdisk_fini ();
   grub_normal_fini ();
   grub_ext2_fini ();
+  grub_ufs_fini ();
   grub_fat_fini ();
   grub_boot_fini ();
   grub_cmp_fini ();