ksud: refine tmpfs

userspace/ksud/src/init_event.rs

@@ -1,7 +1,9 @@
+use crate::defs::{KSU_MOUNT_SOURCE, TEMP_DIR};
 use crate::module::{handle_updated_modules, prune_modules};
 use crate::{assets, defs, ksucalls, restorecon, utils};
 use anyhow::{Context, Result};
 use log::{info, warn};
+use rustix::fs::{mount, MountFlags};
 use std::path::Path;
 
 pub fn on_post_data_fs() -> Result<()> {
@@ -65,6 +67,11 @@ pub fn on_post_data_fs() -> Result<()> {
         warn!("apply root profile sepolicy failed: {}", e);
     }
 
+    // mount temp dir
+    if let Err(e) = mount(KSU_MOUNT_SOURCE, TEMP_DIR, "tmpfs", MountFlags::empty(), "") {
+        warn!("do temp dir mount failed: {}", e);
+    }
+
     // exec modules post-fs-data scripts
     // TODO: Add timeout
     if let Err(e) = crate::module::exec_stage_script("post-fs-data", true) {