/* Find the parent device. */
static struct grub_efidisk_data *
find_parent_device (struct grub_efidisk_data *devices,
struct grub_efidisk_data *d)
{
grub_efi_device_path_t *dp, *ldp;
struct grub_efidisk_data *parent;
dp = duplicate_device_path (d->device_path);
if (! dp)
return 0;
ldp = find_last_device_path (dp);
ldp->type = GRUB_EFI_END_DEVICE_PATH_TYPE;
ldp->subtype = GRUB_EFI_END_ENTIRE_DEVICE_PATH_SUBTYPE;
ldp->length[0] = sizeof (*ldp);
ldp->length[1] = 0;
for (parent = devices; parent; parent = parent->next)
{
/* Ignore itself. */
if (parent == d)
continue;
if (grub_efi_compare_device_paths (parent->device_path, dp) == 0)
break;
}
grub_free (dp);
return parent;
}
static int
iterate_child_devices (struct grub_efidisk_data *devices,
struct grub_efidisk_data *d,
int (*hook) (struct grub_efidisk_data *child))
{
struct grub_efidisk_data *p;
for (p = devices; p; p = p->next)
{
grub_efi_device_path_t *dp, *ldp;
dp = duplicate_device_path (p->device_path);
if (! dp)
return 0;
ldp = find_last_device_path (dp);
ldp->type = GRUB_EFI_END_DEVICE_PATH_TYPE;
ldp->subtype = GRUB_EFI_END_ENTIRE_DEVICE_PATH_SUBTYPE;
ldp->length[0] = sizeof (*ldp);
ldp->length[1] = 0;
if (compare_device_paths (dp, d->device_path) == 0)
if (hook (p))
{
grub_free (dp);
return 1;
}
grub_free (dp);
}
return 0;
}
static int
is_child (struct grub_efidisk_data *child,
struct grub_efidisk_data *parent)
{
grub_efi_device_path_t *dp, *ldp;
int ret;
dp = duplicate_device_path (child->device_path);
if (! dp)
return 0;
ldp = find_last_device_path (dp);
ldp->type = GRUB_EFI_END_DEVICE_PATH_TYPE;
ldp->subtype = GRUB_EFI_END_ENTIRE_DEVICE_PATH_SUBTYPE;
ldp->length[0] = sizeof (*ldp);
ldp->length[1] = 0;
ret = (grub_efi_compare_device_paths (dp, parent->device_path) == 0);
grub_free (dp);
return ret;
}