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* util/getroot.c (grub_util_get_dm_node_linear_info): Moved from here...

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* grub-core/kern/emu/hostdisk.c (grub_util_get_dm_node_linear_info):
	to here. New return value start. All users updated.
	Recursively scan linear mappings.
	* include/grub/emu/hostdisk.h (grub_util_get_dm_node_linear_info): New
	proto.
	* grub-core/kern/emu/hostdisk.c (grub_hostdisk_find_partition_start):
	Use grub_util_get_dm_node_linear_info.
	* util/getroot.c (convert_system_partition_to_system_disk): Use
	grub_util_info rather than grub_dprintf.
	(grub_util_biosdisk_get_grub_dev): Add a new grub_util_info.
This commit is contained in:
Vladimir 'phcoder' Serbinenko 2012-06-07 14:24:48 +02:00
parent 60fde14d3e
commit 558d3a6023
4 changed files with 128 additions and 141 deletions
Download patch file Download diff file Expand all files Collapse all files

158
grub-core/kern/emu/hostdisk.c
View file

@ -420,6 +420,95 @@ grub_util_device_is_mapped (const char *dev)
#endif /* HAVE_DEVICE_MAPPER */
}
#ifdef HAVE_DEVICE_MAPPER
int
grub_util_get_dm_node_linear_info (const char *dev,
int *maj, int *min,
grub_disk_addr_t *st)
{
struct dm_task *dmt;
void *next = NULL;
uint64_t length, start;
char *target, *params;
char *ptr;
int major, minor;
int first = 1;
grub_disk_addr_t partstart = 0;
while (1)
{
dmt = dm_task_create(DM_DEVICE_TABLE);
if (!dmt)
break;
if (! (first ? dm_task_set_name (dmt, dev)
: 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;
}
next = dm_get_next_target(dmt, next, &start, &length,
&target, &params);
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 (first)
return 0;
if (maj)
*maj = major;
if (min)
*min = minor;
if (st)
*st = partstart;
return 1;
}
#endif
#if defined (__FreeBSD__) || defined(__FreeBSD_kernel__)
@ -508,71 +597,10 @@ grub_hostdisk_find_partition_start (const char *dev)
# endif /* !defined(HAVE_DIOCGDINFO) */
# ifdef HAVE_DEVICE_MAPPER
if (grub_util_device_is_mapped (dev)) {
struct dm_task *task = NULL;
grub_uint64_t start, length;
char *target_type, *params, *space;
grub_disk_addr_t partition_start;
/* If any device-mapper operation fails, we fall back silently to
HDIO_GETGEO. */
task = dm_task_create (DM_DEVICE_TABLE);
if (! task)
{
grub_dprintf ("hostdisk", "dm_task_create failed\n");
goto devmapper_fail;
}
if (! dm_task_set_name (task, dev))
{
grub_dprintf ("hostdisk", "dm_task_set_name failed\n");
goto devmapper_fail;
}
if (! dm_task_run (task))
{
grub_dprintf ("hostdisk", "dm_task_run failed\n");
goto devmapper_fail;
}
dm_get_next_target (task, NULL, &start, &length, &target_type, &params);
if (! target_type)
{
grub_dprintf ("hostdisk", "no dm target\n");
goto devmapper_fail;
}
if (strcmp (target_type, "linear") != 0)
{
grub_dprintf ("hostdisk", "ignoring dm target %s (not linear)\n",
target_type);
goto devmapper_fail;
}
if (! params)
{
grub_dprintf ("hostdisk", "no dm params\n");
goto devmapper_fail;
}
/* The params string for a linear target looks like this:
DEVICE-NAME START-SECTOR
Parse this out. */
space = strchr (params, ' ');
if (! space)
goto devmapper_fail;
errno = 0;
partition_start = strtoull (space + 1, NULL, 10);
if (errno == 0)
{
grub_dprintf ("hostdisk", "dm %s starts at %llu\n",
dev, (unsigned long long) partition_start);
dm_task_destroy (task);
return partition_start;
}
devmapper_fail:
if (task)
dm_task_destroy (task);
}
grub_disk_addr_t partition_start;
if (grub_util_device_is_mapped (dev)
&& grub_util_get_dm_node_linear_info (dev, 0, 0, &partition_start))
return partition_start;
# endif /* HAVE_DEVICE_MAPPER */
fd = open (dev, O_RDONLY);