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#include <config-util.h>
#include <grub/disk.h>
#include <grub/partition.h>
#include <grub/msdos_partition.h>
#include <grub/types.h>
#include <grub/err.h>
#include <grub/emu/misc.h>
#include <grub/emu/hostdisk.h>
#include <grub/emu/getroot.h>
#include <grub/misc.h>
#include <grub/i18n.h>
#include <grub/list.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <assert.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include <limits.h>
#if defined(MAJOR_IN_MKDEV)
#include <sys/mkdev.h>
#elif defined(MAJOR_IN_SYSMACROS)
#include <sys/sysmacros.h>
#endif
#ifdef HAVE_DEVICE_MAPPER
# include <libdevmapper.h>
static void device_mapper_null_log (int level __attribute__ ((unused)),
const char *file __attribute__ ((unused)),
int line __attribute__ ((unused)),
int dm_errno __attribute__ ((unused)),
const char *f __attribute__ ((unused)),
...)
{
}
int
grub_device_mapper_supported (void)
{
static int supported = -1;
if (supported == -1)
{
struct dm_task *dmt;
/* Suppress annoying log messages. */
dm_log_with_errno_init (&device_mapper_null_log);
dmt = dm_task_create (DM_DEVICE_VERSION);
supported = (dmt != NULL);
if (dmt)
dm_task_destroy (dmt);
/* Restore the original logger. */
dm_log_with_errno_init (NULL);
}
return supported;
}
int
grub_util_device_is_mapped (const char *dev)
{
struct stat st;
if (!grub_device_mapper_supported ())
return 0;
if (stat (dev, &st) < 0)
return 0;
#if GRUB_DISK_DEVS_ARE_CHAR
if (! S_ISCHR (st.st_mode))
#else
if (! S_ISBLK (st.st_mode))
#endif
return 0;
return dm_is_dm_major (major (st.st_rdev));
}
int
grub_util_device_is_mapped_stat (struct stat *st)
{
#if GRUB_DISK_DEVS_ARE_CHAR
if (! S_ISCHR (st->st_mode))
#else
if (! S_ISBLK (st->st_mode))
#endif
return 0;
if (!grub_device_mapper_supported ())
return 0;
return dm_is_dm_major (major (st->st_rdev));
}
int
grub_util_get_dm_node_linear_info (dev_t dev,
int *maj, int *min,
grub_disk_addr_t *st)
{
struct dm_task *dmt;
void *next = NULL;
uint64_t length, start;
char *target, *params;
const char *ptr;
int major = 0, minor = 0;
int first = 1;
grub_disk_addr_t partstart = 0;
const char *node_uuid;
major = major (dev);
minor = minor (dev);
while (1)
{
dmt = dm_task_create(DM_DEVICE_TABLE);
if (!dmt)
break;
if (! (dm_task_set_major_minor (dmt, major, minor, 0)))
{
dm_task_destroy (dmt);
break;
}
dm_task_no_open_count(dmt);
if (!dm_task_run(dmt))
{
dm_task_destroy (dmt);
break;
}
node_uuid = dm_task_get_uuid (dmt);
if (node_uuid && (strncmp (node_uuid, "LVM-", 4) == 0
|| strncmp (node_uuid, "mpath-", 6) == 0))
{
dm_task_destroy (dmt);
break;
}
next = dm_get_next_target(dmt, next, &start, &length,
&target, ¶ms);
if (grub_strcmp (target, "linear") != 0)
{
dm_task_destroy (dmt);
break;
}
major = grub_strtoul (params, &ptr, 10);
if (grub_errno)
{
dm_task_destroy (dmt);
grub_errno = GRUB_ERR_NONE;
return 0;
}
if (*ptr != ':')
{
dm_task_destroy (dmt);
return 0;
}
ptr++;
minor = grub_strtoul (ptr, &ptr, 10);
if (grub_errno)
{
grub_errno = GRUB_ERR_NONE;
dm_task_destroy (dmt);
return 0;
}
if (*ptr != ' ')
{
dm_task_destroy (dmt);
return 0;
}
ptr++;
partstart += grub_strtoull (ptr, &ptr, 10);
if (grub_errno)
{
grub_errno = GRUB_ERR_NONE;
dm_task_destroy (dmt);
return 0;
}
dm_task_destroy (dmt);
first = 0;
if (!dm_is_dm_major (major))
break;
}
if (first)
return 0;
if (maj)
*maj = major;
if (min)
*min = minor;
if (st)
*st = partstart;
return 1;
}
#else
int
grub_util_device_is_mapped (const char *dev __attribute__ ((unused)))
{
return 0;
}
int
grub_util_get_dm_node_linear_info (dev_t dev __attribute__ ((unused)),
int *maj __attribute__ ((unused)),
int *min __attribute__ ((unused)),
grub_disk_addr_t *st __attribute__ ((unused)))
{
return 0;
}
int
grub_util_device_is_mapped_stat (struct stat *st __attribute__ ((unused)))
{
return 0;
}
#endif
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