From 9292219749bde1df1321d3a9cebe0dfa05285e28 Mon Sep 17 00:00:00 2001
From: xiangfeidexiaohuo <jsjson@163.com>
Date: Sat, 30 Dec 2023 02:09:11 +0800
Subject: [PATCH] Revert "Mount temp dir at /debug_ramdisk (#1226)"

This reverts commit 706cd1e73e1e022dbf42929acaaf27f7170487f9.

Signed-off-by: xiangfeidexiaohuo <jsjson@163.com>
---
 kernel/core_hook.c          |  1 -
 userspace/ksud/src/defs.rs  |  1 -
 userspace/ksud/src/mount.rs | 31 -------------------------------
 3 files changed, 33 deletions(-)

diff --git a/kernel/core_hook.c b/kernel/core_hook.c
index 45696919a0c8..d1f4d5b07131 100644
--- a/kernel/core_hook.c
+++ b/kernel/core_hook.c
@@ -593,7 +593,6 @@ int ksu_handle_setuid(struct cred *new, const struct cred *old)
 	try_umount("/data/adb/modules", false, MNT_DETACH);
 
 	// try umount ksu temp path
-	try_umount("/debug_ramdisk", false, MNT_DETACH);
 	try_umount("/sbin", false, MNT_DETACH);
 
 	return 0;
diff --git a/userspace/ksud/src/defs.rs b/userspace/ksud/src/defs.rs
index 9508f562955b..5d85709a0932 100644
--- a/userspace/ksud/src/defs.rs
+++ b/userspace/ksud/src/defs.rs
@@ -27,7 +27,6 @@ pub const MODULE_UPDATE_TMP_DIR: &str = concatcp!(ADB_DIR, "modules_update/");
 
 pub const SYSTEM_RW_DIR: &str = concatcp!(MODULE_DIR, ".rw/");
 
-pub const TEMP_DIR: &str = "/debug_ramdisk";
 pub const TEMP_DIR_LEGACY: &str = "/sbin";
 
 pub const MODULE_WEB_DIR: &str = "webroot";
diff --git a/userspace/ksud/src/mount.rs b/userspace/ksud/src/mount.rs
index a7f34837f446..a956b650040f 100644
--- a/userspace/ksud/src/mount.rs
+++ b/userspace/ksud/src/mount.rs
@@ -151,33 +151,7 @@ pub fn mount_overlayfs(
 }
 
 #[cfg(any(target_os = "linux", target_os = "android"))]
-pub fn mount_tmpfs(dest: impl AsRef<Path>) -> Result<()> {
-    info!("mount tmpfs on {}", dest.as_ref().display());
-    if let Result::Ok(fs) = fsopen("tmpfs", FsOpenFlags::FSOPEN_CLOEXEC) {
-        let fs = fs.as_fd();
-        fsconfig_set_string(fs, "source", KSU_OVERLAY_SOURCE)?;
-        fsconfig_create(fs)?;
-        let mount = fsmount(fs, FsMountFlags::FSMOUNT_CLOEXEC, MountAttrFlags::empty())?;
-        move_mount(
-            mount.as_fd(),
-            "",
-            CWD,
-            dest.as_ref(),
-            MoveMountFlags::MOVE_MOUNT_F_EMPTY_PATH,
-        )?;
-    } else {
-        mount(
-            KSU_OVERLAY_SOURCE,
-            dest.as_ref(),
-            "tmpfs",
-            MountFlags::empty(),
-            "",
-        )?;
-    }
-    Ok(())
-}
 
-#[cfg(any(target_os = "linux", target_os = "android"))]
 pub fn bind_mount(from: impl AsRef<Path>, to: impl AsRef<Path>) -> Result<()> {
     info!(
         "bind mount {} -> {}",
@@ -316,8 +290,3 @@ pub fn mount_overlay(
 ) -> Result<()> {
     unimplemented!()
 }
-
-#[cfg(not(any(target_os = "linux", target_os = "android")))]
-pub fn mount_tmpfs(_dest: impl AsRef<Path>) -> Result<()> {
-    unimplemented!()
-}