extern int
select_alias (struct multipath * mp)
{
if (mp->mpe && mp->mpe->alias)
mp->alias = STRDUP(mp->mpe->alias);
else {
mp->alias = NULL;
if (want_user_friendly_names(mp)) {
select_alias_prefix(mp);
mp->alias = get_user_friendly_alias(mp->wwid,
conf->bindings_file, mp->alias_prefix, conf->bindings_read_only);
}
if (mp->alias == NULL)
mp->alias = dm_get_name(mp->wwid);
if (mp->alias == NULL)
mp->alias = STRDUP(mp->wwid);
}
return mp->alias ? 0 : 1;
}
static char *
get_device_name(dm_descriptor_t device, int *error)
{
char *dup = NULL;
char *name;
*error = 0;
name = dm_get_name(device, error);
if (*error) {
handle_error("could not determine name of device");
} else {
dup = strdup(name);
if (dup == NULL) {
handle_error("out of memory");
*error = -1;
}
dm_free_name(name);
}
return (dup);
}
/*
* Checks for overlapping slices. If the given device is a slice, and it
* overlaps with any non-backup slice on the disk, return true with a detailed
* description similar to dm_inuse().
*/
int
dm_isoverlapping(char *slicename, char **overlaps_with, int *errp)
{
dm_descriptor_t slice = NULL;
dm_descriptor_t *media = NULL;
dm_descriptor_t *slices = NULL;
int i = 0;
uint32_t in_snum;
uint64_t start_block = 0;
uint64_t end_block = 0;
uint64_t media_size = 0;
uint64_t size = 0;
nvlist_t *media_attrs = NULL;
nvlist_t *slice_attrs = NULL;
int ret = 0;
slice = dm_get_descriptor_by_name(DM_SLICE, slicename, errp);
if (slice == NULL)
goto out;
/*
* Get the list of slices be fetching the associated media, and then all
* associated slices.
*/
media = dm_get_associated_descriptors(slice, DM_MEDIA, errp);
if (media == NULL || *media == NULL || *errp != 0)
goto out;
slices = dm_get_associated_descriptors(*media, DM_SLICE, errp);
if (slices == NULL || *slices == NULL || *errp != 0)
goto out;
media_attrs = dm_get_attributes(*media, errp);
if (media_attrs == NULL || *errp)
goto out;
*errp = nvlist_lookup_uint64(media_attrs, DM_NACCESSIBLE, &media_size);
if (*errp != 0)
goto out;
slice_attrs = dm_get_attributes(slice, errp);
if (slice_attrs == NULL || *errp != 0)
goto out;
*errp = nvlist_lookup_uint64(slice_attrs, DM_START, &start_block);
if (*errp != 0)
goto out;
*errp = nvlist_lookup_uint64(slice_attrs, DM_SIZE, &size);
if (*errp != 0)
goto out;
*errp = nvlist_lookup_uint32(slice_attrs, DM_INDEX, &in_snum);
if (*errp != 0)
goto out;
end_block = (start_block + size) - 1;
for (i = 0; slices[i]; i ++) {
uint64_t other_start;
uint64_t other_end;
uint64_t other_size;
uint32_t snum;
nvlist_t *other_attrs = dm_get_attributes(slices[i], errp);
if (other_attrs == NULL)
continue;
if (*errp != 0)
goto out;
*errp = nvlist_lookup_uint64(other_attrs, DM_START,
&other_start);
if (*errp) {
nvlist_free(other_attrs);
goto out;
}
*errp = nvlist_lookup_uint64(other_attrs, DM_SIZE,
&other_size);
if (*errp) {
nvlist_free(other_attrs);
ret = -1;
goto out;
}
other_end = (other_size + other_start) - 1;
*errp = nvlist_lookup_uint32(other_attrs, DM_INDEX,
&snum);
if (*errp) {
nvlist_free(other_attrs);
ret = -1;
goto out;
}
/*
* Check to see if there are > 2 overlapping regions
* on this media in the same region as this slice.
* This is done by assuming the following:
* Slice 2 is the backup slice if it is the size
* of the whole disk
* If slice 2 is the overlap and slice 2 is the size of
* the whole disk, continue. If another slice is found
* that overlaps with our slice, return it.
* There is the potential that there is more than one slice
* that our slice overlaps with, however, we only return
* the first overlapping slice we find.
*
*/
if (start_block >= other_start && start_block <= other_end) {
if ((snum == 2 && (other_size == media_size)) ||
snum == in_snum) {
continue;
} else {
char *str = dm_get_name(slices[i], errp);
if (*errp != 0) {
nvlist_free(other_attrs);
ret = -1;
goto out;
}
*overlaps_with = strdup(str);
dm_free_name(str);
nvlist_free(other_attrs);
ret = 1;
goto out;
}
} else if (other_start >= start_block &&
other_start <= end_block) {
if ((snum == 2 && (other_size == media_size)) ||
snum == in_snum) {
continue;
} else {
char *str = dm_get_name(slices[i], errp);
if (*errp != 0) {
nvlist_free(other_attrs);
ret = -1;
goto out;
}
*overlaps_with = strdup(str);
dm_free_name(str);
nvlist_free(other_attrs);
ret = 1;
goto out;
}
}
nvlist_free(other_attrs);
}
out:
if (media_attrs)
nvlist_free(media_attrs);
if (slice_attrs)
nvlist_free(slice_attrs);
if (slices)
dm_free_descriptors(slices);
if (media)
dm_free_descriptors(media);
if (slice)
dm_free_descriptor(slice);
return (ret);
}
/* ARGSUSED */
int
check_disk(const char *name, dm_descriptor_t disk, int force, int isspare)
{
dm_descriptor_t *drive, *media, *slice;
int err = 0;
int i;
int ret;
/*
* Get the drive associated with this disk. This should never fail,
* because we already have an alias handle open for the device.
*/
if ((drive = dm_get_associated_descriptors(disk, DM_DRIVE,
&err)) == NULL || *drive == NULL) {
if (err)
libdiskmgt_error(err);
return (0);
}
if ((media = dm_get_associated_descriptors(*drive, DM_MEDIA,
&err)) == NULL) {
dm_free_descriptors(drive);
if (err)
libdiskmgt_error(err);
return (0);
}
dm_free_descriptors(drive);
/*
* It is possible that the user has specified a removable media drive,
* and the media is not present.
*/
if (*media == NULL) {
dm_free_descriptors(media);
vdev_error(gettext("'%s' has no media in drive\n"), name);
return (-1);
}
if ((slice = dm_get_associated_descriptors(*media, DM_SLICE,
&err)) == NULL) {
dm_free_descriptors(media);
if (err)
libdiskmgt_error(err);
return (0);
}
dm_free_descriptors(media);
ret = 0;
/*
* Iterate over all slices and report any errors. We don't care about
* overlapping slices because we are using the whole disk.
*/
for (i = 0; slice[i] != NULL; i++) {
char *name = dm_get_name(slice[i], &err);
if (check_slice(name, force, B_TRUE, isspare) != 0)
ret = -1;
dm_free_name(name);
}
dm_free_descriptors(slice);
return (ret);
}