Ejemplo n.º 1
0
static int bl_dm_create_tree(uint64_t dev)
{
	struct dm_tree *tree;
	struct bl_dm_tree *bl_tree;

	bl_tree = find_bl_dm_tree(dev);
	if (bl_tree)
		return 1;

	tree = dm_tree_create();
	if (!tree)
		return 0;

	if (!dm_tree_add_dev(tree, MAJOR(dev), MINOR(dev))) {
		dm_tree_free(tree);
		return 0;
	}

	bl_tree = malloc(sizeof(struct bl_dm_tree));
	if (!bl_tree) {
		dm_tree_free(tree);
		return 0;
	}

	bl_tree->dev = dev;
	bl_tree->tree = tree;
	bl_tree->next = NULL;
	add_to_bl_dm_tree(bl_tree);

	return 1;
}
Ejemplo n.º 2
0
static int
grub_util_open_dm (const char *os_dev, struct dm_tree **tree,
		   struct dm_tree_node **node)
{
  uint32_t maj, min;
  struct stat st;

  *node = NULL;
  *tree = NULL;

  if (stat (os_dev, &st) < 0)
    return 0;

  maj = major (st.st_rdev);
  min = minor (st.st_rdev);

  if (!dm_is_dm_major (maj))
    return 0;

  *tree = dm_tree_create ();
  if (! *tree)
    {
      grub_puts_ (N_("Failed to create `device-mapper' tree"));
      grub_dprintf ("hostdisk", "dm_tree_create failed\n");
      return 0;
    }

  if (! dm_tree_add_dev (*tree, maj, min))
    {
      grub_dprintf ("hostdisk", "dm_tree_add_dev failed\n");
      dm_tree_free (*tree);
      *tree = NULL;
      return 0;
    }

  *node = dm_tree_find_node (*tree, maj, min);
  if (! *node)
    {
      grub_dprintf ("hostdisk", "dm_tree_find_node failed\n");
      dm_tree_free (*tree);
      *tree = NULL;
      return 0;
    }
  return 1;
}
Ejemplo n.º 3
0
void
grub_util_iterate_devices (int NESTED_FUNC_ATTR (*hook) (const char *, int),
			   int floppy_disks)
{
  int i;

  clear_seen_devices ();

  /* Floppies.  */
  for (i = 0; i < floppy_disks; i++)
    {
      char name[16];
      struct stat st;

      get_floppy_disk_name (name, i);
      if (stat (name, &st) < 0)
	break;
      /* In floppies, write the map, whether check_device_readable_unique
         succeeds or not, because the user just may not insert floppies.  */
      if (hook (name, 1))
	goto out;
    }

#ifdef __linux__
  {
    DIR *dir = opendir ("/dev/disk/by-id");

    if (dir)
      {
	struct dirent *entry;
	struct device *devs;
	size_t devs_len = 0, devs_max = 1024, i;

	devs = xmalloc (devs_max * sizeof (*devs));

	/* Dump all the directory entries into names, resizing if
	   necessary.  */
	for (entry = readdir (dir); entry; entry = readdir (dir))
	  {
	    /* Skip current and parent directory entries.  */
	    if (strcmp (entry->d_name, ".") == 0 ||
		strcmp (entry->d_name, "..") == 0)
	      continue;
	    /* Skip partition entries.  */
	    if (strstr (entry->d_name, "-part"))
	      continue;
	    /* Skip device-mapper entries; we'll handle the ones we want
	       later.  */
	    if (strncmp (entry->d_name, "dm-", sizeof ("dm-") - 1) == 0)
	      continue;
	    /* Skip RAID entries; they are handled by upper layers.  */
	    if (strncmp (entry->d_name, "md-", sizeof ("md-") - 1) == 0)
	      continue;
	    if (devs_len >= devs_max)
	      {
		devs_max *= 2;
		devs = xrealloc (devs, devs_max * sizeof (*devs));
	      }
	    devs[devs_len].stable =
	      xasprintf ("/dev/disk/by-id/%s", entry->d_name);
	    devs[devs_len].kernel =
	      canonicalize_file_name (devs[devs_len].stable);
	    devs_len++;
	  }

	qsort (devs, devs_len, sizeof (*devs), &compare_devices);

	closedir (dir);

	/* Now add all the devices in sorted order.  */
	for (i = 0; i < devs_len; ++i)
	  {
	    if (check_device_readable_unique (devs[i].stable))
	      {
		if (hook (devs[i].stable, 0))
		  goto out;
	      }
	    free (devs[i].stable);
	    free (devs[i].kernel);
	  }
	free (devs);
      }
  }

  if (have_devfs ())
    {
      i = 0;
      while (1)
	{
	  char discn[32];
	  char name[PATH_MAX];
	  struct stat st;

	  /* Linux creates symlinks "/dev/discs/discN" for convenience.
	     The way to number disks is the same as GRUB's.  */
	  sprintf (discn, "/dev/discs/disc%d", i++);
	  if (stat (discn, &st) < 0)
	    break;

	  if (realpath (discn, name))
	    {
	      strcat (name, "/disc");
	      if (hook (name, 0))
		goto out;
	    }
	}
      goto out;
    }
#endif /* __linux__ */

  /* IDE disks.  */
  for (i = 0; i < 96; i++)
    {
      char name[16];

      get_ide_disk_name (name, i);
      if (check_device_readable_unique (name))
	{
	  if (hook (name, 0))
	    goto out;
	}
    }

#ifdef __FreeBSD_kernel__
  /* IDE disks using ATA Direct Access driver.  */
  if (get_kfreebsd_version () >= 800000)
    for (i = 0; i < 96; i++)
      {
	char name[16];

	get_ada_disk_name (name, i);
	if (check_device_readable_unique (name))
	  {
	    if (hook (name, 0))
	      goto out;
	  }
      }

  /* ATARAID disks.  */
  for (i = 0; i < 8; i++)
    {
      char name[20];

      get_ataraid_disk_name (name, i);
      if (check_device_readable_unique (name))
	{
	  if (hook (name, 0))
	    goto out;
        }
    }
#endif

#ifdef __linux__
  /* Virtio disks.  */
  for (i = 0; i < 26; i++)
    {
      char name[16];

      get_virtio_disk_name (name, i);
      if (check_device_readable_unique (name))
	{
	  if (hook (name, 0))
	    goto out;
	}
    }

  /* ATARAID disks.  */
  for (i = 0; i < 8; i++)
    {
      char name[20];

      get_ataraid_disk_name (name, i);
      if (check_device_readable_unique (name))
	{
	  if (hook (name, 0))
	    goto out;
        }
    }

  /* Xen virtual block devices.  */
  for (i = 0; i < 26; i++)
    {
      char name[16];

      get_xvd_disk_name (name, i);
      if (check_device_readable_unique (name))
	{
	  if (hook (name, 0))
	    goto out;
	}
    }
#endif /* __linux__ */

  /* The rest is SCSI disks.  */
  for (i = 0; i < 48; i++)
    {
      char name[16];

      get_scsi_disk_name (name, i);
      if (check_device_readable_unique (name))
	{
	  if (hook (name, 0))
	    goto out;
	}
    }

#ifdef __linux__
  /* This is for DAC960 - we have
     /dev/rd/c<controller>d<logical drive>p<partition>.

     DAC960 driver currently supports up to 8 controllers, 32 logical
     drives, and 7 partitions.  */
  {
    int controller, drive;

    for (controller = 0; controller < 8; controller++)
      {
	for (drive = 0; drive < 15; drive++)
	  {
	    char name[24];

	    get_dac960_disk_name (name, controller, drive);
	    if (check_device_readable_unique (name))
	      {
		if (hook (name, 0))
		  goto out;
	      }
	  }
      }
  }

  /* This is for Mylex Acceleraid - we have
     /dev/rd/c<controller>d<logical drive>p<partition>.  */
  {
    int controller, drive;

    for (controller = 0; controller < 8; controller++)
      {
	for (drive = 0; drive < 15; drive++)
	  {
	    char name[24];

	    get_acceleraid_disk_name (name, controller, drive);
	    if (check_device_readable_unique (name))
	      {
		if (hook (name, 0))
		  goto out;
	      }
	  }
      }
  }

  /* This is for CCISS - we have
     /dev/cciss/c<controller>d<logical drive>p<partition>.  */
  {
    int controller, drive;

    for (controller = 0; controller < 3; controller++)
      {
	for (drive = 0; drive < 16; drive++)
	  {
	    char name[24];

	    get_cciss_disk_name (name, controller, drive);
	    if (check_device_readable_unique (name))
	      {
		if (hook (name, 0))
		  goto out;
	      }
	  }
      }
  }

  /* This is for Compaq Intelligent Drive Array - we have
     /dev/ida/c<controller>d<logical drive>p<partition>.  */
  {
    int controller, drive;

    for (controller = 0; controller < 3; controller++)
      {
	for (drive = 0; drive < 16; drive++)
	  {
	    char name[24];

	    get_ida_disk_name (name, controller, drive);
	    if (check_device_readable_unique (name))
	      {
		if (hook (name, 0))
		  goto out;
	      }
	  }
      }
  }

  /* This is for I2O - we have /dev/i2o/hd<logical drive><partition> */
  {
    char unit;

    for (unit = 'a'; unit < 'f'; unit++)
      {
	char name[24];

	get_i2o_disk_name (name, unit);
	if (check_device_readable_unique (name))
	  {
	    if (hook (name, 0))
	      goto out;
	  }
      }
  }

  /* MultiMediaCard (MMC).  */
  for (i = 0; i < 10; i++)
    {
      char name[16];

      get_mmc_disk_name (name, i);
      if (check_device_readable_unique (name))
	{
	  if (hook (name, 0))
	    goto out;
	}
    }

# ifdef HAVE_DEVICE_MAPPER
#  define dmraid_check(cond, ...) \
  if (! (cond)) \
    { \
      grub_dprintf ("deviceiter", __VA_ARGS__); \
      goto dmraid_end; \
    }

  /* DM-RAID.  */
  if (grub_device_mapper_supported ())
    {
      struct dm_tree *tree = NULL;
      struct dm_task *task = NULL;
      struct dm_names *names = NULL;
      unsigned int next = 0;
      void *top_handle, *second_handle;
      struct dm_tree_node *root, *top, *second;

      /* Build DM tree for all devices.  */
      tree = dm_tree_create ();
      dmraid_check (tree, "dm_tree_create failed\n");
      task = dm_task_create (DM_DEVICE_LIST);
      dmraid_check (task, "dm_task_create failed\n");
      dmraid_check (dm_task_run (task), "dm_task_run failed\n");
      names = dm_task_get_names (task);
      dmraid_check (names, "dm_task_get_names failed\n");
      dmraid_check (names->dev, "No DM devices found\n");
      do
	{
	  names = (void *) names + next;
	  dmraid_check (dm_tree_add_dev (tree, MAJOR (names->dev),
					 MINOR (names->dev)),
			   "dm_tree_add_dev (%s) failed\n", names->name);
	  next = names->next;
	}
      while (next);

      /* Walk the second-level children of the inverted tree; that is, devices
	 which are directly composed of non-DM devices such as hard disks.
	 This class includes all DM-RAID disks and excludes all DM-RAID
	 partitions.  */
      root = dm_tree_find_node (tree, 0, 0);
      top_handle = NULL;
      top = dm_tree_next_child (&top_handle, root, 1);
      while (top)
	{
	  second_handle = NULL;
	  second = dm_tree_next_child (&second_handle, top, 1);
	  while (second)
	    {
	      const char *node_name, *node_uuid;
	      char *name;

	      node_name = dm_tree_node_get_name (second);
	      dmraid_check (node_name, "dm_tree_node_get_name failed\n");
	      node_uuid = dm_tree_node_get_uuid (second);
	      dmraid_check (node_uuid, "dm_tree_node_get_uuid failed\n");
	      if (strncmp (node_uuid, "DMRAID-", 7) != 0)
		{
		  grub_dprintf ("deviceiter", "%s is not DM-RAID\n", node_name);
		  goto dmraid_next_child;
		}

	      name = xasprintf ("/dev/mapper/%s", node_name);
	      if (check_device_readable_unique (name))
		{
		  if (hook (name, 0))
		    {
		      free (name);
		      if (task)
			dm_task_destroy (task);
		      if (tree)
			dm_tree_free (tree);
		      goto out;
		    }
		}
	      free (name);

dmraid_next_child:
	      second = dm_tree_next_child (&second_handle, top, 1);
	    }
	  top = dm_tree_next_child (&top_handle, root, 1);
	}

dmraid_end:
      if (task)
	dm_task_destroy (task);
      if (tree)
	dm_tree_free (tree);
    }
# endif /* HAVE_DEVICE_MAPPER */
#endif /* __linux__ */

out:
  clear_seen_devices ();
}