diff --git a/exts/devmaster/src/lib/config/netif_conf.rs b/exts/devmaster/src/lib/config/netif_conf.rs
index 9c593902c51ec5328b69d82b523c837f316dafdd..44ae7f7227c5434f8b28a8145ceae180e43f3980 100644
--- a/exts/devmaster/src/lib/config/netif_conf.rs
+++ b/exts/devmaster/src/lib/config/netif_conf.rs
@@ -132,6 +132,8 @@ impl NetifConfigCtx {
                 if name.ends_with(".link") {
                     let conf_path = dir_path.join(&name);
 
+                    log::debug!("loading .link config: {:?}", conf_path);
+
                     let s = match std::fs::read_to_string(&conf_path) {
                         Ok(content) => content,
                         Err(e) => {
diff --git a/exts/devmaster/src/lib/rules/exec_mgr.rs b/exts/devmaster/src/lib/rules/exec_mgr.rs
index 22b9a2ad64b132d4f30fac9da4b8ef3336309aeb..54e0093e7162fa82a59943bc27c154a550967d92 100644
--- a/exts/devmaster/src/lib/rules/exec_mgr.rs
+++ b/exts/devmaster/src/lib/rules/exec_mgr.rs
@@ -903,20 +903,16 @@ impl ExecuteManager {
             }
             MatchImportCmdline => {
                 let cmdline = basic::cmdline::Cmdline::default();
-                let s = cmdline.get_param(&token_value);
 
-                if s.is_none() {
+                if !cmdline.has_param(&token_value) {
                     return Ok(token.read().unwrap().as_ref().unwrap().op == OperatorType::Nomatch);
                 }
 
-                let value = match s.as_ref().unwrap().split_once('=') {
-                    Some(ret) => ret.1,
-                    None => "",
-                };
+                let value = cmdline.get_param(&token_value);
 
                 execute_err!(
                     token.read().unwrap().as_ref().unwrap(),
-                    device.add_property(&token_value, if value.is_empty() { "1" } else { value })
+                    device.add_property(&token_value, &value.unwrap_or_default())
                 )?;
 
                 Ok(token.read().unwrap().as_ref().unwrap().op == OperatorType::Match)
diff --git a/exts/devmaster/src/lib/utils/commons.rs b/exts/devmaster/src/lib/utils/commons.rs
index 700caf2d2127f45bb55f6fb1f38aa87dcb92de0a..80e37b3acbd1d77c149bc0ab37599c7891d11827 100644
--- a/exts/devmaster/src/lib/utils/commons.rs
+++ b/exts/devmaster/src/lib/utils/commons.rs
@@ -19,7 +19,7 @@ use std::{
 
 use crate::{error::*, log_dev, rules::FormatSubstitutionType, utils::trie::*};
 use basic::{error::errno_is_privilege, IN_SET};
-use device::{Device, DB_BASE_DIR};
+use device::{Device, DB_BASE_DIR, DEFAULT_BASE_DIR};
 use lazy_static::lazy_static;
 use nix::{errno::Errno, unistd::unlink};
 use snafu::ResultExt;
@@ -575,7 +575,7 @@ pub(crate) fn device_update_tag(
 pub(crate) fn cleanup_db(dev: Rc<Device>) -> Result<()> {
     let id = dev.get_device_id().context(DeviceSnafu)?;
 
-    let db_path = format!("{}{}", DB_BASE_DIR, id);
+    let db_path = format!("{}/{}/{}", DEFAULT_BASE_DIR, DB_BASE_DIR, id);
 
     match unlink(db_path.as_str()) {
         Ok(_) => log_dev!(debug, dev, format!("unlinked '{}'", db_path)),