/*
* Returns 'in use' details, if found, about a specific dev_name,
* based on the caller(who). It is important to note that it is possible
* for there to be more than one 'in use' statistic regarding a dev_name.
* The **msg parameter returns a list of 'in use' details. This message
* is formatted via gettext().
*/
int
dm_inuse(char *dev_name, char **msg, dm_who_type_t who, int *errp)
{
nvlist_t *dev_stats = NULL;
char *by, *data;
nvpair_t *nvwhat = NULL;
nvpair_t *nvdesc = NULL;
int found = 0;
int err;
char *dname = NULL;
*errp = 0;
*msg = NULL;
/*
* If the user doesn't want to do in use checking, return.
*/
if (NOINUSE_SET)
return (0);
dname = getfullblkname(dev_name);
/*
* If we cannot find the block name, we cannot check the device
* for in use statistics. So, return found, which is == 0.
*/
if (dname == NULL || *dname == '\0') {
return (found);
}
/*
* Slice stats for swap devices are only returned if mounted
* (e.g. /tmp). Other devices or files being used for swap
* are ignored, so we add a special check here to use swapctl(2)
* to perform in-use checking.
*/
if (ANY_ZPOOL_USE(who) && (err = dm_inuse_swap(dname, errp))) {
/* on error, dm_inuse_swap sets errp */
if (err < 0) {
free(dname);
return (err);
}
/* simulate a mounted swap device */
(void) build_usage_string(dname, DM_USE_MOUNT, "swap", msg,
&found, errp);
/* if this fails, dm_get_usage_string changed */
ASSERT(found == 1);
free(dname);
return (found);
}
dm_get_slice_stats(dname, &dev_stats, errp);
if (dev_stats == NULL) {
/*
* If there is an error, but it isn't a no device found error
* return the error as recorded. Otherwise, with a full
* block name, we might not be able to get the slice
* associated, and will get an ENODEV error. For example,
* an SVM metadevice will return a value from getfullblkname()
* but libdiskmgt won't be able to find this device for
* statistics gathering. This is expected and we should not
* report errnoneous errors.
*/
if (*errp) {
if (*errp == ENODEV) {
*errp = 0;
}
}
free(dname);
return (found);
}
for (;;) {
nvwhat = nvlist_next_nvpair(dev_stats, nvdesc);
nvdesc = nvlist_next_nvpair(dev_stats, nvwhat);
/*
* End of the list found.
*/
if (nvwhat == NULL || nvdesc == NULL) {
break;
}
/*
* Otherwise, we check to see if this client(who) cares
* about this in use scenario
*/
ASSERT(strcmp(nvpair_name(nvwhat), DM_USED_BY) == 0);
ASSERT(strcmp(nvpair_name(nvdesc), DM_USED_NAME) == 0);
/*
* If we error getting the string value continue on
* to the next pair(if there is one)
*/
if (nvpair_value_string(nvwhat, &by)) {
continue;
}
if (nvpair_value_string(nvdesc, &data)) {
continue;
}
switch (who) {
case DM_WHO_MKFS:
/*
* mkfs is not in use for these cases.
* All others are in use.
*/
if (strcmp(by, DM_USE_LU) == 0 ||
strcmp(by, DM_USE_FS) == 0 ||
strcmp(by, DM_USE_EXPORTED_ZPOOL) == 0) {
break;
}
if (build_usage_string(dname,
by, data, msg, &found, errp) != 0) {
if (*errp) {
goto out;
}
}
break;
case DM_WHO_SWAP:
/*
* Not in use for this.
*/
if (strcmp(by, DM_USE_DUMP) == 0 ||
strcmp(by, DM_USE_FS) == 0 ||
strcmp(by, DM_USE_EXPORTED_ZPOOL) == 0) {
break;
}
if (strcmp(by, DM_USE_LU) == 0 &&
strcmp(data, "-") == 0) {
break;
}
if (strcmp(by, DM_USE_VFSTAB) == 0 &&
strcmp(data, "") == 0) {
break;
}
if (build_usage_string(dname,
by, data, msg, &found, errp) != 0) {
if (*errp) {
goto out;
}
}
break;
case DM_WHO_DUMP:
/*
* Not in use for this.
*/
if ((strcmp(by, DM_USE_MOUNT) == 0 &&
strcmp(data, "swap") == 0) ||
strcmp(by, DM_USE_DUMP) == 0 ||
strcmp(by, DM_USE_FS) == 0 ||
strcmp(by, DM_USE_EXPORTED_ZPOOL) == 0) {
break;
}
if (build_usage_string(dname,
by, data, msg, &found, errp)) {
if (*errp) {
goto out;
}
}
break;
case DM_WHO_FORMAT:
if (strcmp(by, DM_USE_FS) == 0 ||
strcmp(by, DM_USE_EXPORTED_ZPOOL) == 0)
break;
if (build_usage_string(dname,
by, data, msg, &found, errp) != 0) {
if (*errp) {
goto out;
}
}
break;
case DM_WHO_ZPOOL_FORCE:
if (strcmp(by, DM_USE_FS) == 0 ||
strcmp(by, DM_USE_EXPORTED_ZPOOL) == 0)
break;
/* FALLTHROUGH */
case DM_WHO_ZPOOL:
if (build_usage_string(dname,
by, data, msg, &found, errp) != 0) {
if (*errp)
goto out;
}
break;
case DM_WHO_ZPOOL_SPARE:
if (strcmp(by, DM_USE_SPARE_ZPOOL) != 0) {
if (build_usage_string(dname, by,
data, msg, &found, errp) != 0) {
if (*errp)
goto out;
}
}
break;
default:
/*
* nothing found in use for this client
* of libdiskmgt. Default is 'not in use'.
*/
break;
}
}
out:
if (dname != NULL)
free(dname);
if (dev_stats != NULL)
nvlist_free(dev_stats);
return (found);
}
/*
* Returns 'in use' details, if found, about a specific dev_name,
* based on the caller(who). It is important to note that it is possible
* for there to be more than one 'in use' statistic regarding a dev_name.
* The **msg parameter returns a list of 'in use' details. This message
* is formatted via gettext().
*/
int
dm_inuse(char *dev_name, char **msg, dm_who_type_t who, int *errp)
{
nvlist_t *dev_stats = NULL;
char *by, *data;
nvpair_t *nvwhat = NULL;
nvpair_t *nvdesc = NULL;
int found = 0;
*errp = 0;
*msg = NULL;
/*
* If the user doesn't want to do in use checking, return.
*/
if (NOINUSE_SET)
return (0);
dm_get_slice_stats(dev_name, &dev_stats, errp);
if (dev_stats == NULL) {
/*
* If there is an error, but it isn't a no device found error
* return the error as recorded. Otherwise, with a full
* block name, we might not be able to get the slice
* associated, and will get an ENODEV error. For example,
* an SVM metadevice will return a value from getfullblkname()
* but libdiskmgt won't be able to find this device for
* statistics gathering. This is expected and we should not
* report errnoneous errors.
*/
if (*errp) {
if (*errp == ENODEV) {
*errp = 0;
}
}
// free(dname);
return (found);
}
for (;;) {
nvwhat = nvlist_next_nvpair(dev_stats, nvdesc);
nvdesc = nvlist_next_nvpair(dev_stats, nvwhat);
/*
* End of the list found.
*/
if (nvwhat == NULL || nvdesc == NULL) {
break;
}
/*
* Otherwise, we check to see if this client(who) cares
* about this in use scenario
*/
ASSERT(strcmp(nvpair_name(nvwhat), DM_USED_BY) == 0);
ASSERT(strcmp(nvpair_name(nvdesc), DM_USED_NAME) == 0);
/*
* If we error getting the string value continue on
* to the next pair(if there is one)
*/
if (nvpair_value_string(nvwhat, &by)) {
continue;
}
if (nvpair_value_string(nvdesc, &data)) {
continue;
}
switch (who) {
case DM_WHO_ZPOOL_FORCE:
if (strcmp(by, DM_USE_FS) == 0 ||
strcmp(by, DM_USE_EXPORTED_ZPOOL) == 0 ||
strcmp(by, DM_USE_OS_PARTITION) == 0)
break;
/* FALLTHROUGH */
case DM_WHO_ZPOOL:
if (build_usage_string(dev_name,
by, data, msg, &found, errp) != 0) {
if (*errp)
goto out;
}
break;
case DM_WHO_ZPOOL_SPARE:
if (strcmp(by, DM_USE_SPARE_ZPOOL) != 0) {
if (build_usage_string(dev_name, by,
data, msg, &found, errp) != 0) {
if (*errp)
goto out;
}
}
break;
default:
/*
* nothing found in use for this client
* of libdiskmgt. Default is 'not in use'.
*/
break;
}
}
out:
nvlist_free(dev_stats);
return (found);
}
