make the linux-ppc packags be in synch with other platforms

[tangerine.git] / arch / common / boot / grub2 / fs / iso9660.c

/* iso9660.c - iso9660 implementation with extensions:
   SUSP, Rock Ridge.  */
/*
 *  GRUB  --  GRand Unified Bootloader
 *  Copyright (C) 2004,2005,2006,2007  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
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  GRUB 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 GRUB.  If not, see <http://www.gnu.org/licenses/>.
 */

#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>
#include <grub/fshelp.h>

#define GRUB_ISO9660_FSTYPE_DIR         0040000
#define GRUB_ISO9660_FSTYPE_REG         0100000
#define GRUB_ISO9660_FSTYPE_SYMLINK     0120000
#define GRUB_ISO9660_FSTYPE_MASK        0170000

#define GRUB_ISO9660_LOG2_BLKSZ         2
#define GRUB_ISO9660_BLKSZ              2048

#define GRUB_ISO9660_RR_DOT             2
#define GRUB_ISO9660_RR_DOTDOT          4

#define GRUB_ISO9660_VOLDESC_BOOT       0
#define GRUB_ISO9660_VOLDESC_PRIMARY    1
#define GRUB_ISO9660_VOLDESC_SUPP       2
#define GRUB_ISO9660_VOLDESC_PART       3
#define GRUB_ISO9660_VOLDESC_END        255

/* The head of a volume descriptor.  */
struct grub_iso9660_voldesc
{
  grub_uint8_t type;
  grub_uint8_t magic[5];
  grub_uint8_t version;
} __attribute__ ((packed));

/* A directory entry.  */
struct grub_iso9660_dir
{
  grub_uint8_t len;
  grub_uint8_t ext_sectors;
  grub_uint32_t first_sector;
  grub_uint32_t first_sector_be;
  grub_uint32_t size;
  grub_uint32_t size_be;
  grub_uint8_t unused1[7];
  grub_uint8_t flags;
  grub_uint8_t unused2[6];
  grub_uint8_t namelen;
} __attribute__ ((packed));

/* The primary volume descriptor.  Only little endian is used.  */
struct grub_iso9660_primary_voldesc
{
  struct grub_iso9660_voldesc voldesc;
  grub_uint8_t unused1[33];
  grub_uint8_t volname[32];
  grub_uint8_t unused2[16];
  grub_uint8_t escape[32];
  grub_uint8_t unused3[12];
  grub_uint32_t path_table_size;
  grub_uint8_t unused4[4];
  grub_uint32_t path_table;
  grub_uint8_t unused5[12];
  struct grub_iso9660_dir rootdir;
} __attribute__ ((packed));

/* A single entry in the path table.  */
struct grub_iso9660_path
{
  grub_uint8_t len;
  grub_uint8_t sectors;
  grub_uint32_t first_sector;
  grub_uint16_t parentdir;
  grub_uint8_t name[0];
} __attribute__ ((packed));

/* An entry in the System Usage area of the directory entry.  */
struct grub_iso9660_susp_entry
{
  grub_uint8_t sig[2];
  grub_uint8_t len;
  grub_uint8_t version;
  grub_uint8_t data[0];
} __attribute__ ((packed));

/* The CE entry.  This is used to describe the next block where data
   can be found.  */
struct grub_iso9660_susp_ce
{
  struct grub_iso9660_susp_entry entry;
  grub_uint32_t blk;
  grub_uint32_t blk_be;
  grub_uint32_t off;
  grub_uint32_t off_be;
  grub_uint32_t len;
  grub_uint32_t len_be;
} __attribute__ ((packed));

struct grub_iso9660_data
{
  struct grub_iso9660_primary_voldesc voldesc;
  grub_disk_t disk;
  unsigned int first_sector;
  unsigned int length;
  int rockridge;
  int susp_skip;
  int joliet;
};

struct grub_fshelp_node
{
  struct grub_iso9660_data *data;
  unsigned int size;
  unsigned int blk;
  unsigned int dir_blk;
  unsigned int dir_off;
};

#ifndef GRUB_UTIL
static grub_dl_t my_mod;
#endif
\f

/* Iterate over the susp entries, starting with block SUA_BLOCK on the
   offset SUA_POS with a size of SUA_SIZE bytes.  Hook is called for
   every entry.  */
static grub_err_t
grub_iso9660_susp_iterate (struct grub_iso9660_data *data,
                           int sua_block, int sua_pos, int sua_size,
                           grub_err_t (*hook)
                           (struct grub_iso9660_susp_entry *entry))
{
  char *sua;
  struct grub_iso9660_susp_entry *entry;
  
  auto grub_err_t load_sua (void);
  
  /* Load a part of the System Usage Area.  */
  grub_err_t load_sua (void)
    {
      sua = grub_malloc (sua_size);
      if (!sua)
        return grub_errno;
      
      if (grub_disk_read (data->disk, sua_block, sua_pos,
                          sua_size, sua))
        return grub_errno;
      
      entry = (struct grub_iso9660_susp_entry *) sua;
      return 0;
    }
  
  if (load_sua ())
    return grub_errno;
  
  for (; (char *) entry < (char *) sua + sua_size - 1;
       entry = (struct grub_iso9660_susp_entry *)
         ((char *) entry + entry->len))
    {
      /* The last entry.  */
      if (grub_strncmp ((char *) entry->sig, "ST", 2) == 0)
        break;
      
      /* Additional entries are stored elsewhere.  */
      if (grub_strncmp ((char *) entry->sig, "CE", 2) == 0)
        {
          struct grub_iso9660_susp_ce *ce;
          
          ce = (struct grub_iso9660_susp_ce *) entry;
          sua_size = grub_le_to_cpu32 (ce->len);
          sua_pos = grub_le_to_cpu32 (ce->off);
          sua_block = grub_le_to_cpu32 (ce->blk) << GRUB_ISO9660_LOG2_BLKSZ;
          
          grub_free (sua);
          if (load_sua ())
            return grub_errno;
        }
      
      if (hook (entry))
        {
          grub_free (sua);
          return 0;
        }
    }
  
  grub_free (sua);
  return 0;
}

static char *
grub_iso9660_convert_string (grub_uint16_t *us, int len)
{
  char *p;
  int i;

  p = grub_malloc (len * 4 + 1);
  if (! p)
    return p;

  for (i=0; i<len; i++)
    us[i] = grub_be_to_cpu16 (us[i]);

  *grub_utf16_to_utf8 ((grub_uint8_t *) p, us, len) = '\0';

  return p;
}

static struct grub_iso9660_data *
grub_iso9660_mount (grub_disk_t disk)
{
  struct grub_iso9660_data *data = 0;
  struct grub_iso9660_dir rootdir;
  int sua_pos;
  int sua_size;
  char *sua;
  struct grub_iso9660_susp_entry *entry;
  struct grub_iso9660_primary_voldesc voldesc;
  int block;
  
  auto grub_err_t susp_iterate (struct grub_iso9660_susp_entry *);
  
  grub_err_t susp_iterate (struct grub_iso9660_susp_entry *susp_entry)
    {
      /* The "ER" entry is used to detect extensions.  The
         `IEEE_P1285' extension means Rock ridge.  */
      if (grub_strncmp ((char *) susp_entry->sig, "ER", 2) == 0)
        {
          data->rockridge = 1;
          return 1;
        }
      return 0;
    }
  
  data = grub_malloc (sizeof (struct grub_iso9660_data));
  if (! data)
    return 0;
  
  data->disk = disk;
  data->rockridge = 0;
  data->joliet = 0;

  block = 16;
  do
    {
      int copy_voldesc = 0;

      /* Read the superblock.  */
      if (grub_disk_read (disk, block << GRUB_ISO9660_LOG2_BLKSZ, 0,
                          sizeof (struct grub_iso9660_primary_voldesc),
                          (char *) &voldesc))
        {
          grub_error (GRUB_ERR_BAD_FS, "not a iso9660 filesystem");
          goto fail;
        }

      if (grub_strncmp ((char *) voldesc.voldesc.magic, "CD001", 5) != 0)
        {
          grub_error (GRUB_ERR_BAD_FS, "not a iso9660 filesystem");
          goto fail;
        }

      if (voldesc.voldesc.type == GRUB_ISO9660_VOLDESC_PRIMARY)
        copy_voldesc = 1;
      else if ((voldesc.voldesc.type == GRUB_ISO9660_VOLDESC_SUPP) &&
               (voldesc.escape[0] == 0x25) && (voldesc.escape[1] == 0x2f) &&
               ((voldesc.escape[2] == 0x40) ||  /* UCS-2 Level 1.  */
                (voldesc.escape[2] == 0x43) ||  /* UCS-2 Level 2.  */
                (voldesc.escape[2] == 0x45)))   /* UCS-2 Level 3.  */
        {
          copy_voldesc = 1;
          data->joliet = 1;
        }

      if (copy_voldesc)
        grub_memcpy((char *) &data->voldesc, (char *) &voldesc,
                    sizeof (struct grub_iso9660_primary_voldesc));

      block++;
    } while (voldesc.voldesc.type != GRUB_ISO9660_VOLDESC_END);

  /* Read the system use area and test it to see if SUSP is
     supported.  */
  if (grub_disk_read (disk, (grub_le_to_cpu32 (data->voldesc.rootdir.first_sector)
                             << GRUB_ISO9660_LOG2_BLKSZ), 0,
                      sizeof (rootdir), (char *) &rootdir))
    {
      grub_error (GRUB_ERR_BAD_FS, "not a iso9660 filesystem");
      goto fail;
    }
  
  sua_pos = (sizeof (rootdir) + rootdir.namelen
             + (rootdir.namelen % 2) - 1);
  sua_size = rootdir.len - sua_pos;

  sua = grub_malloc (sua_size);
  if (! sua)
    goto fail;
  
  if (grub_disk_read (disk, (grub_le_to_cpu32 (data->voldesc.rootdir.first_sector)
                             << GRUB_ISO9660_LOG2_BLKSZ), sua_pos,
                      sua_size, sua))
    {
      grub_error (GRUB_ERR_BAD_FS, "not a iso9660 filesystem");
      goto fail;
    }
  
  entry = (struct grub_iso9660_susp_entry *) sua;
  
  /* Test if the SUSP protocol is used on this filesystem.  */
  if (grub_strncmp ((char *) entry->sig, "SP", 2) == 0)
    {
      /* The 2nd data byte stored how many bytes are skipped every time
         to get to the SUA (System Usage Area).  */
      data->susp_skip = entry->data[2];
      entry = (struct grub_iso9660_susp_entry *) ((char *) entry + entry->len);
      
      /* Iterate over the entries in the SUA area to detect
         extensions.  */
      if (grub_iso9660_susp_iterate (data,
                                     (grub_le_to_cpu32 (data->voldesc.rootdir.first_sector)
                                      << GRUB_ISO9660_LOG2_BLKSZ),
                                     sua_pos, sua_size, susp_iterate))
        goto fail;
    }
  
  return data;
    
 fail:
  grub_free (data);
  return 0;
}


static char *
grub_iso9660_read_symlink (grub_fshelp_node_t node)
{
  struct grub_iso9660_dir dirent;
  int sua_off;
  int sua_size;
  char *symlink = 0;
  int addslash = 0;
  
  auto void add_part (const char *part, int len);
  auto grub_err_t susp_iterate_sl (struct grub_iso9660_susp_entry *);

  /* Extend the symlink.  */
  void add_part (const char *part, int len)
    {
      int size = grub_strlen (symlink);
      
      symlink = grub_realloc (symlink, size + len + 1);
      if (! symlink)
        return;
      
      grub_strncat (symlink, part, len);
    }
    
  /* Read in a symlink.  */
  grub_err_t susp_iterate_sl (struct grub_iso9660_susp_entry *entry)
    {
      if (grub_strncmp ("SL", (char *) entry->sig, 2) == 0)
        {
          unsigned int pos = 1;

          /* The symlink is not stored as a POSIX symlink, translate it.  */
          while (pos < grub_le_to_cpu32 (entry->len))
            {
              if (addslash)
                {
                  add_part ("/", 1);
                  addslash = 0;
                }
              
              /* The current position is the `Component Flag'.  */
              switch (entry->data[pos] & 30)
                {
                case 0:
                  {
                    /* The data on pos + 2 is the actual data, pos + 1
                       is the length.  Both are part of the `Component
                       Record'.  */
                    add_part ((char *) &entry->data[pos + 2],
                              entry->data[pos + 1]);
                    if ((entry->data[pos] & 1))
                      addslash = 1;

                    break;
                  }
                
                case 2:
                  add_part ("./", 2);
                  break;
                
                case 4:
                  add_part ("../", 3);
                  break;
                  
                case 8:
                  add_part ("/", 1);
                  break;
                }
              /* In pos + 1 the length of the `Component Record' is
                 stored.  */
              pos += entry->data[pos + 1] + 2;
            }
          
          /* Check if `grub_realloc' failed.  */
          if (grub_errno)
            return grub_errno;
        }
      
      return 0;
    }
  
  if (grub_disk_read (node->data->disk, node->dir_blk, node->dir_off,
                      sizeof (dirent), (char *) &dirent))
    return 0;
  
  sua_off = (sizeof (dirent) + dirent.namelen + 1 - (dirent.namelen % 2)
             + node->data->susp_skip);
  sua_size = dirent.len - sua_off;
  
  symlink = grub_malloc (1);
  if (!symlink)
    return 0;
  
  *symlink = '\0';
  
  if (grub_iso9660_susp_iterate (node->data, node->dir_blk,
                                 node->dir_off + sua_off,
                                 sua_size, susp_iterate_sl))
    {
      grub_free (symlink);
      return 0;
    }
  
  return symlink;
}


static int
grub_iso9660_iterate_dir (grub_fshelp_node_t dir,
                          int NESTED_FUNC_ATTR
                          (*hook) (const char *filename,
                                   enum grub_fshelp_filetype filetype,
                                   grub_fshelp_node_t node))
{
  struct grub_iso9660_dir dirent;
  unsigned int offset = 0;
  char *filename;
  int filename_alloc = 0;
  enum grub_fshelp_filetype type;
  
  auto grub_err_t susp_iterate_dir (struct grub_iso9660_susp_entry *);

  grub_err_t susp_iterate_dir (struct grub_iso9660_susp_entry *entry)
    {
      /* The filename in the rock ridge entry.  */
      if (grub_strncmp ("NM", (char *) entry->sig, 2) == 0)
        {
          /* The flags are stored at the data position 0, here the
             filename type is stored.  */
          if (entry->data[0] & GRUB_ISO9660_RR_DOT)
            filename = ".";
          else if (entry->data[0] & GRUB_ISO9660_RR_DOTDOT)
            filename = "..";
          else
            {
              int size = 1;
              if (filename)
                {
                  size += grub_strlen (filename);
                  grub_realloc (filename,
                                grub_strlen (filename)
                                + entry->len);
                }
              else
                {
                  size = entry->len - 5;
                  filename = grub_malloc (size + 1);
                  filename[0] = '\0';
                }
              filename_alloc = 1;
              grub_strncpy (filename, (char *) &entry->data[1], size);
              filename[size] = '\0';
            }
        }
      /* The mode information (st_mode).  */
      else if (grub_strncmp ((char *) entry->sig, "PX", 2) == 0)
        {
          /* At position 0 of the PX record the st_mode information is
             stored.  */
          grub_uint32_t mode = ((*(grub_uint32_t *) &entry->data[0])
                                & GRUB_ISO9660_FSTYPE_MASK);

          switch (mode)
            {
            case GRUB_ISO9660_FSTYPE_DIR:
              type = GRUB_FSHELP_DIR;
              break;
            case GRUB_ISO9660_FSTYPE_REG:
              type = GRUB_FSHELP_REG;
              break;
            case GRUB_ISO9660_FSTYPE_SYMLINK:
              type = GRUB_FSHELP_SYMLINK;
              break;
            default:
              type = GRUB_FSHELP_UNKNOWN;
            }
        }
      
      return 0;
    }

  while (offset < dir->size)
    {
      if (grub_disk_read (dir->data->disk,
                          (dir->blk << GRUB_ISO9660_LOG2_BLKSZ)
                          + offset / GRUB_DISK_SECTOR_SIZE,
                          offset % GRUB_DISK_SECTOR_SIZE,
                          sizeof (dirent), (char *) &dirent))
        return 0;
      
      /* The end of the block, skip to the next one.  */
      if (!dirent.len)
        {
          offset = (offset / GRUB_ISO9660_BLKSZ + 1) * GRUB_ISO9660_BLKSZ;
          continue;
        }
      
      {
        char name[dirent.namelen + 1];
        int nameoffset = offset + sizeof (dirent);
        struct grub_fshelp_node *node;
        int sua_off = (sizeof (dirent) + dirent.namelen + 1
                       - (dirent.namelen % 2));;
        int sua_size = dirent.len - sua_off;
        
        sua_off += offset + dir->data->susp_skip;
        
        filename = 0;
        filename_alloc = 0;
        type = GRUB_FSHELP_UNKNOWN;

        if (dir->data->rockridge
            && grub_iso9660_susp_iterate (dir->data,
                                          (dir->blk << GRUB_ISO9660_LOG2_BLKSZ)
                                          + (sua_off
                                             / GRUB_DISK_SECTOR_SIZE),
                                          sua_off % GRUB_DISK_SECTOR_SIZE,
                                          sua_size, susp_iterate_dir))
          return 0;
        
        /* Read the name.  */
        if (grub_disk_read (dir->data->disk,
                            (dir->blk << GRUB_ISO9660_LOG2_BLKSZ)
                            + nameoffset / GRUB_DISK_SECTOR_SIZE,
                            nameoffset % GRUB_DISK_SECTOR_SIZE,
                            dirent.namelen, (char *) name))
          return 0;
        
        node = grub_malloc (sizeof (struct grub_fshelp_node));
        if (!node)
          return 0;
        
        /* Setup a new node.  */
        node->data = dir->data;
        node->size = grub_le_to_cpu32 (dirent.size);
        node->blk = grub_le_to_cpu32 (dirent.first_sector);
        node->dir_blk = ((dir->blk << GRUB_ISO9660_LOG2_BLKSZ)
                         + offset / GRUB_DISK_SECTOR_SIZE);
        node->dir_off = offset % GRUB_DISK_SECTOR_SIZE;
        
        /* If the filetype was not stored using rockridge, use
           whatever is stored in the iso9660 filesystem.  */
        if (type == GRUB_FSHELP_UNKNOWN)
          {
            if ((dirent.flags & 3) == 2)
              type = GRUB_FSHELP_DIR;
            else
              type = GRUB_FSHELP_REG;
          }
        
        /* The filename was not stored in a rock ridge entry.  Read it
           from the iso9660 filesystem.  */
        if (!filename)
          {
            name[dirent.namelen] = '\0';
            filename = grub_strrchr (name, ';');
            if (filename)
              *filename = '\0';
            
            if (dirent.namelen == 1 && name[0] == 0)
              filename = ".";
            else if (dirent.namelen == 1 && name[0] == 1)
              filename = "..";
            else
              filename = name;
          }
        
        if (dir->data->joliet)
          {
            char *oldname;

            oldname = filename;
            filename = grub_iso9660_convert_string
                  ((grub_uint16_t *) oldname, dirent.namelen >> 1);

            if (filename_alloc)
              grub_free (oldname);

            filename_alloc = 1;
          }

        if (hook (filename, type, node))
          {
            if (filename_alloc)
              grub_free (filename);
            return 1;
          }
        if (filename_alloc)
          grub_free (filename);
      }
      
      offset += dirent.len;
    }
  
  return 0;
}


\f
static grub_err_t
grub_iso9660_dir (grub_device_t device, const char *path, 
                  int (*hook) (const char *filename, int dir))
{
  struct grub_iso9660_data *data = 0;
  struct grub_fshelp_node rootnode;
  struct grub_fshelp_node *foundnode;
  
  auto int NESTED_FUNC_ATTR iterate (const char *filename,
                                     enum grub_fshelp_filetype filetype,
                                     grub_fshelp_node_t node);

  int NESTED_FUNC_ATTR iterate (const char *filename,
                                enum grub_fshelp_filetype filetype,
                                grub_fshelp_node_t node)
    {
      grub_free (node);
      
      if (filetype == GRUB_FSHELP_DIR)
        return hook (filename, 1);
      else 
        return hook (filename, 0);
      
      return 0;
    }

#ifndef GRUB_UTIL
  grub_dl_ref (my_mod);
#endif

  data = grub_iso9660_mount (device->disk);
  if (! data)
    goto fail;
  
  rootnode.data = data;
  rootnode.blk = grub_le_to_cpu32 (data->voldesc.rootdir.first_sector);
  rootnode.size = grub_le_to_cpu32 (data->voldesc.rootdir.size);
  
  /* Use the fshelp function to traverse the path.  */
  if (grub_fshelp_find_file (path, &rootnode,
                             &foundnode,
                             grub_iso9660_iterate_dir,
                             grub_iso9660_read_symlink,
                             GRUB_FSHELP_DIR))
    goto fail;
  
  /* List the files in the directory.  */
  grub_iso9660_iterate_dir (foundnode, iterate);
  
  if (foundnode != &rootnode)
    grub_free (foundnode);
  
 fail:
  grub_free (data);

#ifndef GRUB_UTIL
  grub_dl_unref (my_mod);
#endif

  return grub_errno;
}


/* Open a file named NAME and initialize FILE.  */
static grub_err_t
grub_iso9660_open (struct grub_file *file, const char *name)
{
  struct grub_iso9660_data *data;
  struct grub_fshelp_node rootnode;
  struct grub_fshelp_node *foundnode;
  
#ifndef GRUB_UTIL
  grub_dl_ref (my_mod);
#endif

  data = grub_iso9660_mount (file->device->disk);
  if (!data)
    goto fail;
  
  rootnode.data = data;
  rootnode.blk = grub_le_to_cpu32 (data->voldesc.rootdir.first_sector);
  rootnode.size = grub_le_to_cpu32 (data->voldesc.rootdir.size);
  
  /* Use the fshelp function to traverse the path.  */
  if (grub_fshelp_find_file (name, &rootnode,
                             &foundnode,
                             grub_iso9660_iterate_dir,
                             grub_iso9660_read_symlink,
                             GRUB_FSHELP_REG))
    goto fail;
  
  data->first_sector = foundnode->blk;
  data->length = foundnode->size;
  
  file->data = data;
  file->size = foundnode->size;
  file->offset = 0;
  
  return 0;
  
 fail:
#ifndef GRUB_UTIL
  grub_dl_unref (my_mod);
#endif
  
  grub_free (data);
  
  return grub_errno;;
}


static grub_ssize_t
grub_iso9660_read (grub_file_t file, char *buf, grub_size_t len)
{
  struct grub_iso9660_data *data = 
    (struct grub_iso9660_data *) file->data;
  
  /* XXX: The file is stored in as a single extent.  */
  data->disk->read_hook = file->read_hook;        
  grub_disk_read (data->disk,
                  data->first_sector << GRUB_ISO9660_LOG2_BLKSZ,
                  file->offset,
                  len, buf);
  data->disk->read_hook = 0;
  
  return len;
}


static grub_err_t
grub_iso9660_close (grub_file_t file)
{
  grub_free (file->data);
  
#ifndef GRUB_UTIL
  grub_dl_unref (my_mod);
#endif
  
  return GRUB_ERR_NONE;
}


static grub_err_t
grub_iso9660_label (grub_device_t device, char **label)
{
  struct grub_iso9660_data *data;
  data = grub_iso9660_mount (device->disk);
  
  if (data)
    {
      if (data->joliet)
        *label = grub_iso9660_convert_string
                 ((grub_uint16_t *) &data->voldesc.volname, 16);
      else
        *label = grub_strndup ((char *) data->voldesc.volname, 32);
      grub_free (data);
    }
  else
    *label = 0;

  return grub_errno;
}

\f

static struct grub_fs grub_iso9660_fs =
  {
    .name = "iso9660",
    .dir = grub_iso9660_dir,
    .open = grub_iso9660_open,
    .read = grub_iso9660_read,
    .close = grub_iso9660_close,
    .label = grub_iso9660_label,
    .next = 0
  };

GRUB_MOD_INIT(iso9660)
{
  grub_fs_register (&grub_iso9660_fs);
#ifndef GRUB_UTIL
  my_mod = mod;
#endif
}

GRUB_MOD_FINI(iso9660)
{
  grub_fs_unregister (&grub_iso9660_fs);
}