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Support for partitioned loop devices. Improved devmapper support

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This commit is contained in:
Vladimir 'phcoder' Serbinenko 2010-11-08 16:51:50 +01:00
parent d2bf06bf34
commit c0e103e4da
2 changed files with 133 additions and 26 deletions
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88
grub-core/kern/emu/getroot.c
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@ -32,6 +32,10 @@
#include <stdint.h>
#include <grub/util/misc.h>
#ifdef HAVE_DEVICE_MAPPER
# include <libdevmapper.h>
#endif
#ifdef __GNU__
#include <hurd.h>
#include <hurd/lookup.h>
@ -560,30 +564,66 @@ grub_guess_root_device (const char *dir)
}
static int
grub_util_is_dmraid (const char *os_dev)
grub_util_is_lvm (const char *os_dev)
{
if (! strncmp (os_dev, "/dev/mapper/nvidia_", 19))
return 1;
else if (! strncmp (os_dev, "/dev/mapper/isw_", 16))
return 1;
else if (! strncmp (os_dev, "/dev/mapper/hpt37x_", 19))
return 1;
else if (! strncmp (os_dev, "/dev/mapper/hpt45x_", 19))
return 1;
else if (! strncmp (os_dev, "/dev/mapper/via_", 16))
return 1;
else if (! strncmp (os_dev, "/dev/mapper/lsi_", 16))
return 1;
else if (! strncmp (os_dev, "/dev/mapper/pdc_", 16))
return 1;
else if (! strncmp (os_dev, "/dev/mapper/jmicron_", 20))
return 1;
else if (! strncmp (os_dev, "/dev/mapper/asr_", 16))
return 1;
else if (! strncmp (os_dev, "/dev/mapper/sil_", 16))
return 1;
if ((strncmp ("/dev/mapper/", os_dev, 12) != 0))
return 0;
#ifdef HAVE_DEVICE_MAPPER
{
struct dm_tree *tree;
uint32_t maj, min;
struct dm_tree_node *node = NULL, *child;
void *handle;
const char *node_uuid, *mapper_name = NULL, *child_uuid, *child_name;
struct stat st;
return 0;
if (stat (os_dev, &st) < 0)
return 0;
tree = dm_tree_create ();
if (! tree)
{
grub_printf ("Failed to create tree\n");
grub_dprintf ("hostdisk", "dm_tree_create failed\n");
return 0;
}
maj = major (st.st_rdev);
min = minor (st.st_rdev);
if (! dm_tree_add_dev (tree, maj, min))
{
grub_dprintf ("hostdisk", "dm_tree_add_dev failed\n");
dm_tree_free (tree);
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);
return 0;
}
node_uuid = dm_tree_node_get_uuid (node);
if (! node_uuid)
{
grub_dprintf ("hostdisk", "%s has no DM uuid\n", os_dev);
dm_tree_free (tree);
return 0;
}
if (strncmp (node_uuid, "LVM-", 4) != 0)
{
dm_tree_free (tree);
return 0;
}
dm_tree_free (tree);
return 1;
}
#else
return 1;
#endif /* HAVE_DEVICE_MAPPER */
}
int
@ -595,9 +635,7 @@ grub_util_get_dev_abstraction (const char *os_dev __attribute__((unused)))
return GRUB_DEV_ABSTRACTION_NONE;
/* Check for LVM. */
if (!strncmp (os_dev, "/dev/mapper/", 12)
&& ! grub_util_is_dmraid (os_dev)
&& strncmp (os_dev, "/dev/mapper/mpath", 17) != 0)
if (grub_util_is_lvm (os_dev))
return GRUB_DEV_ABSTRACTION_LVM;
/* Check for RAID. */