}
CONFIGFS_ATTR(nvmet_subsys_, attr_serial);
+static ssize_t nvmet_subsys_attr_cntlid_min_show(struct config_item *item,
+ char *page)
+{
+ return snprintf(page, PAGE_SIZE, "%u\n", to_subsys(item)->cntlid_min);
+}
+
+static ssize_t nvmet_subsys_attr_cntlid_min_store(struct config_item *item,
+ const char *page, size_t cnt)
+{
+ u16 cntlid_min;
+
+ if (sscanf(page, "%hu\n", &cntlid_min) != 1)
+ return -EINVAL;
+
+ if (cntlid_min == 0)
+ return -EINVAL;
+
+ down_write(&nvmet_config_sem);
+ if (cntlid_min >= to_subsys(item)->cntlid_max)
+ goto out_unlock;
+ to_subsys(item)->cntlid_min = cntlid_min;
+ up_write(&nvmet_config_sem);
+ return cnt;
+
+out_unlock:
+ up_write(&nvmet_config_sem);
+ return -EINVAL;
+}
+CONFIGFS_ATTR(nvmet_subsys_, attr_cntlid_min);
+
+static ssize_t nvmet_subsys_attr_cntlid_max_show(struct config_item *item,
+ char *page)
+{
+ return snprintf(page, PAGE_SIZE, "%u\n", to_subsys(item)->cntlid_max);
+}
+
+static ssize_t nvmet_subsys_attr_cntlid_max_store(struct config_item *item,
+ const char *page, size_t cnt)
+{
+ u16 cntlid_max;
+
+ if (sscanf(page, "%hu\n", &cntlid_max) != 1)
+ return -EINVAL;
+
+ if (cntlid_max == 0)
+ return -EINVAL;
+
+ down_write(&nvmet_config_sem);
+ if (cntlid_max <= to_subsys(item)->cntlid_min)
+ goto out_unlock;
+ to_subsys(item)->cntlid_max = cntlid_max;
+ up_write(&nvmet_config_sem);
+ return cnt;
+
+out_unlock:
+ up_write(&nvmet_config_sem);
+ return -EINVAL;
+}
+CONFIGFS_ATTR(nvmet_subsys_, attr_cntlid_max);
+
static struct configfs_attribute *nvmet_subsys_attrs[] = {
&nvmet_subsys_attr_attr_allow_any_host,
&nvmet_subsys_attr_attr_version,
&nvmet_subsys_attr_attr_serial,
+ &nvmet_subsys_attr_attr_cntlid_min,
+ &nvmet_subsys_attr_attr_cntlid_max,
NULL,
};
if (!ctrl->sqs)
goto out_free_cqs;
+ if (subsys->cntlid_min > subsys->cntlid_max)
+ goto out_free_cqs;
+
ret = ida_simple_get(&cntlid_ida,
- NVME_CNTLID_MIN, NVME_CNTLID_MAX,
+ subsys->cntlid_min, subsys->cntlid_max,
GFP_KERNEL);
if (ret < 0) {
status = NVME_SC_CONNECT_CTRL_BUSY | NVME_SC_DNR;
kfree(subsys);
return ERR_PTR(-ENOMEM);
}
-
+ subsys->cntlid_min = NVME_CNTLID_MIN;
+ subsys->cntlid_max = NVME_CNTLID_MAX;
kref_init(&subsys->ref);
mutex_init(&subsys->lock);