Revert "Mount temp dir at /debug_ramdisk (tiann#1226)"

This reverts commit 706cd1e.

Signed-off-by: xiangfeidexiaohuo <[email protected]>

kernel/core_hook.c

@@ -534,7 +534,6 @@ 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;

userspace/ksud/src/defs.rs

@@ -28,7 +28,6 @@ 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 MODULE_WEB_DIR: &str = "webroot";
 pub const DISABLE_FILE_NAME: &str = "disable";
 pub const UPDATE_FILE_NAME: &str = "update";

userspace/ksud/src/mount.rs

@@ -152,24 +152,7 @@ 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());
-    let 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,
-    )?;
-    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 {} -> {}",
@@ -299,8 +282,3 @@ 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!()
-}