universal7885: parts: Implement swap on /data ctrl

universal7885-common/apps/SamsungParts/AndroidManifest.xml

@@ -40,6 +40,12 @@
 				<category android:name="android.intent.category.DEFAULT"/>
 			</intent-filter>
 		</activity>
+		<activity android:name=".swap.SwapActivity" android:exported="true" android:label="@string/swap_title">
+			<intent-filter>
+				<action android:name="android.intent.action.MAIN"/>
+				<category android:name="android.intent.category.DEFAULT"/>
+			</intent-filter>
+		</activity>
 		<provider android:name=".dolby.DolbySearchIndexablesProvider" android:exported="true" android:authorities="com.eurekateam.samsungextras" android:multiprocess="false" android:grantUriPermissions="true" android:permission="android.permission.READ_SEARCH_INDEXABLES">
 			<intent-filter>
 				<action android:name="android.content.action.SEARCH_INDEXABLES_PROVIDER"/>

universal7885-common/apps/SamsungParts/jni/SwapBridge.cpp

@@ -0,0 +1,28 @@
+#include "jni.h"
+#include <hardware/hardware.h>
+#include <hidl/HidlSupport.h>
+#include <hidl/LegacySupport.h>
+#include <hidl/Status.h>
+#include <vendor/eureka/hardware/parts/1.0/ISwapOnData.h>
+
+using android::sp;
+using vendor::eureka::hardware::parts::V1_0::ISwapOnData;
+
+static sp<ISwapOnData> service = ISwapOnData::getService();
+
+extern "C" JNIEXPORT void JNICALL
+Java_com_eurekateam_samsungextras_interfaces_Swap_setSize(JNIEnv *env,
+                                                             jclass clazz,
+                                                             jint size) {
+  service->setSwapSize(size);
+}
+
+extern "C" JNIEXPORT void JNICALL
+Java_com_eurekateam_samsungextras_interfaces_Swap_setSwapOn(
+    JNIEnv *env, jclass clazz, jboolean enable) {
+	if (enable){
+		service->setSwapOn();
+	} else {
+		service->setSwapOff();
+	}
+}

universal7885-common/apps/SamsungParts/res/drawable/ic_memory.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+
+    <path
+        android:pathData="M0 0h24v24H0V0z" />
+    <path
+        android:fillColor="#000000"
+        android:pathData="M15 9H9v6h6V9zm-2 4h-2v-2h2v2zm8-2V9h-2V7c0-1.1-0.9-2-2-2h-2V3h-2v2h-2V3H9v2H7c-1.1 0-2 0.9-2 2v2H3v2h2v2H3v2h2v2c0 1.1 0.9 2 2 2h2v2h2v-2h2v2h2v-2h2c1.1 0 2-0.9 2-2v-2h2v-2h-2v-2h2zm-4 6H7V7h10v10z" />
+</vector>

universal7885-common/apps/SamsungParts/res/values/strings.xml

@@ -56,6 +56,11 @@
 	<string name="flashlight_description">Samsung\'s OneUI Has An Option to Adjust
         Flashlight Brightness. AOSP doesn\'t have this feature.\n\n
         Use this feature to adjust low or high flashlight brightness. Ranges from 0 to 10.</string>
+	<string name="swap_title">Swap on userdata</string>
+	<string name="swap_enable_title">Enable swap on EMMC</string>
+	<string name="swap_size_title">Swap size</string>
+	<string name="swap_size_summary">Adjust the size of swap</string>
+	<string name="swap_description">Creates the swap (not zram) on /data partiton. Useful for low memory devices.</string>
 	<!-- Display Category -->
 	<string name="misc_category">Misc</string>
 	<string name="dt2w_mode">Toggle for double tap to wake</string>

universal7885-common/apps/SamsungParts/res/xml/preferences_samsung_parts.xml

@@ -22,6 +22,9 @@
 		</Preference>
 	</PreferenceCategory>
 	<PreferenceCategory android:title="@string/misc_category">
+		<Preference android:key="swap_settings" android:title="@string/swap_title" android:icon="@drawable/ic_memory" android:summary="@string/swap_description" android:persistent="true">
+			<intent android:action="android.intent.action.MAIN" android:targetClass="com.eurekateam.samsungextras.swap.SwapActivity" android:targetPackage="com.eurekateam.samsungextras"/>
+		</Preference>
 		<SwitchPreference android:key="dt2w_settings" android:title="@string/dt2w_mode" android:persistent="true"/>
 		<SwitchPreference android:key="glove_mode_settings" android:title="@string/glove_mode" android:persistent="true"/>
 	</PreferenceCategory>

universal7885-common/apps/SamsungParts/res/xml/swap_settings.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android" android:title="@string/swap_title">
+	<com.android.settingslib.widget.MainSwitchPreference android:defaultValue="false" android:key="swap_enable" android:title="@string/swap_enable_title"/>
+	<SeekBarPreference android:key="swap_size" android:title="@string/swap_size_title" android:icon="@drawable/ic_memory" android:summary="@string/swap_size_summary"/>
+	<com.android.settingslib.widget.FooterPreference android:title="@string/swap_description" android:selectable="false"/>
+</PreferenceScreen>

universal7885-common/apps/SamsungParts/src/com/eurekateam/samsungextras/interfaces/Swap.kt

@@ -0,0 +1,22 @@
+/*
+ * Copyright (C) 2022 Eureka Team
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.eurekateam.samsungextras.interfaces
+
+object Swap{
+	external fun setSwapOn(mEnabled: Boolean)
+	external fun setSize(mSize : Int)
+}

universal7885-common/apps/SamsungParts/src/com/eurekateam/samsungextras/swap/SwapActivity.kt

@@ -0,0 +1,30 @@
+/*
+ * Copyright (C) 2022 Eureka Team
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.eurekateam.samsungextras.swap
+
+import android.os.Bundle
+import com.android.settingslib.collapsingtoolbar.CollapsingToolbarBaseActivity
+import com.android.settingslib.collapsingtoolbar.R
+
+class SwapActivity : CollapsingToolbarBaseActivity() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        supportFragmentManager.beginTransaction().replace(
+            R.id.content_frame,
+            SwapFragment()
+        ).commit()
+    }
+}

universal7885-common/apps/SamsungParts/src/com/eurekateam/samsungextras/swap/SwapFragment.kt

@@ -0,0 +1,69 @@
+/*
+ * Copyright (C) 2022 Eureka Team
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.eurekateam.samsungextras.swap
+
+import android.content.SharedPreferences
+import android.os.Build
+import android.os.Bundle
+import android.widget.Switch
+import androidx.preference.Preference
+import androidx.preference.PreferenceFragmentCompat
+import androidx.preference.PreferenceManager
+import androidx.preference.SeekBarPreference
+import com.android.settingslib.widget.MainSwitchPreference
+import com.android.settingslib.widget.OnMainSwitchChangeListener
+import com.eurekateam.samsungextras.R
+import com.eurekateam.samsungextras.interfaces.Swap
+
+class SwapFragment : PreferenceFragmentCompat(), Preference.OnPreferenceChangeListener, OnMainSwitchChangeListener {
+    private lateinit var mSwapSizePref: SeekBarPreference
+    private lateinit var mSharedPreferences: SharedPreferences
+    private lateinit var mSwapEnable: MainSwitchPreference
+    override fun onCreatePreferences(savedInstanceState: Bundle?, rootKey: String?) {
+        addPreferencesFromResource(R.xml.swap_settings)
+        mSharedPreferences = PreferenceManager.getDefaultSharedPreferences(requireContext())
+        mSwapSizePref = findPreference(PREF_SWAP_SIZE)!!
+        mSwapSizePref.onPreferenceChangeListener = this
+        mSwapSizePref.setMax(100)
+        mSwapSizePref.setMin(10)
+        mSwapSizePref.value = mSharedPreferences.getInt(PREF_SWAP_SIZE, 50)
+        mSwapEnable = findPreference(PREF_SWAP_ENABLE)!!
+        mSwapEnable.isChecked = mSharedPreferences.getBoolean(PREF_SWAP_ENABLE, false)
+        mSwapEnable.addOnSwitchChangeListener(this)
+        mSwapSizePref.isEnabled = !mSwapEnable.isChecked
+    }
+
+    override fun onPreferenceChange(preference: Preference, newValue: Any): Boolean {
+        if (preference == mSwapSizePref) {
+            val value = newValue as Int
+            Swap.setSize(value)
+            mSharedPreferences.edit().putInt(PREF_SWAP_SIZE, value).apply()
+            return true
+        }
+        return false
+    }
+
+    override fun onSwitchChanged(switchView: Switch, isChecked: Boolean) {
+    	Swap.setSwapOn(isChecked)
+        mSharedPreferences.edit().putBoolean(PREF_SWAP_ENABLE, isChecked)
+        mSwapSizePref.isEnabled = !isChecked
+    } 
+    
+    companion object {
+        const val PREF_SWAP_SIZE = "swap_size"
+        const val PREF_SWAP_ENABLE = "swap_enable"
+    }
+}

universal7885-common/hardware/interfaces/hardware/parts/1.0/Android.bp

@@ -6,6 +6,7 @@ hidl_interface {
        "IBatteryStats.hal",
        "IFlashBrightness.hal",
        "IDisplayConfigs.hal",
+       "ISwapOnData.hal",
     ],
     interfaces: [ "android.hidl.base@1.0" ],
     gen_java: false,

universal7885-common/hardware/interfaces/hardware/parts/1.0/ISwapOnData.hal

@@ -0,0 +1,21 @@
+// Copyright (C) 2021 Eureka Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package vendor.eureka.hardware.parts@1.0;
+
+interface ISwapOnData {
+	setSwapSize(int32_t size /* Size in megabytes */);
+	setSwapOn();
+	setSwapOff();
+};

universal7885-common/hardware/interfaces/hardware/parts/1.0/default/Android.bp

@@ -7,6 +7,7 @@ cc_binary {
         "Battery.cpp",
         "FlashLight.cpp",
         "Display.cpp",
+        "Swap.cpp",
         "service.cpp",
     ],
     shared_libs: [

universal7885-common/hardware/interfaces/hardware/parts/1.0/default/Swap.cpp

@@ -0,0 +1,52 @@
+// Copyright (C) 2021 Eureka Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "Swap.h"
+#include <fstream>
+#include <iostream>
+
+static int mSwapSize = 100;
+
+#define SWAP_PATH "/data/swap/swapfile"
+using namespace std;
+namespace vendor::eureka::hardware::parts::V1_0 {
+
+Return<void> SwapOnData::setSwapSize(int32_t size) {
+  mSwapSize = size;
+  return Void();
+}
+
+Return<void> SwapOnData::setSwapOn(){
+	string cmd = string("dd if=/dev/zero of=") + string(SWAP_PATH) + string(" bs=") + std::to_string(mSwapSize) 
+		+ " count=10";
+	system(cmd.c_str());
+	cmd = string("mkswap ") + string(SWAP_PATH);
+	system(cmd.c_str());
+	cmd = string("swapon ") + string(SWAP_PATH);
+	system(cmd.c_str());
+	return Void();
+}
+
+Return<void> SwapOnData::setSwapOff(){
+	std::string cmd = string("swapoff ") + string(SWAP_PATH);
+	system(cmd.c_str());
+	cmd = string("rm ") + string(SWAP_PATH);
+	system(cmd.c_str());
+	return Void();
+}
+
+ISwapOnData *SwapOnData::getInstance(void) {
+  return new SwapOnData();
+}
+} // namespace vendor::eureka::hardware::parts::V1_0

universal7885-common/hardware/interfaces/hardware/parts/1.0/default/Swap.h

@@ -0,0 +1,40 @@
+// Copyright (C) 2021 Eureka Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#pragma once
+
+#include <hidl/MQDescriptor.h>
+#include <hidl/Status.h>
+#include <vendor/eureka/hardware/parts/1.0/ISwapOnData.h>
+
+namespace vendor::eureka::hardware::parts::V1_0 {
+
+using ::android::sp;
+using ::android::hardware::hidl_array;
+using ::android::hardware::hidl_memory;
+using ::android::hardware::hidl_string;
+using ::android::hardware::hidl_vec;
+using ::android::hardware::Return;
+using ::android::hardware::Void;
+
+struct SwapOnData : public ISwapOnData {
+  // Methods from ::vendor::eureka::hardware::parts::V1_0::ISwapOnData
+  // follow.
+  Return<void> setSwapSize(int32_t size);
+  Return<void> setSwapOn();
+  Return<void> setSwapOff();
+  // Methods from ::android::hidl::base::V2_0::IBase follow.
+  static ISwapOnData *getInstance(void);
+};
+} // namespace vendor::eureka::hardware::parts::V1_0

universal7885-common/hardware/interfaces/hardware/parts/1.0/default/service.cpp

@@ -18,10 +18,12 @@
 #include <vendor/eureka/hardware/parts/1.0/IBatteryStats.h>
 #include <vendor/eureka/hardware/parts/1.0/IDisplayConfigs.h>
 #include <vendor/eureka/hardware/parts/1.0/IFlashBrightness.h>
+#include <vendor/eureka/hardware/parts/1.0/ISwapOnData.h>
 
 #include "Battery.h"
 #include "Display.h"
 #include "FlashLight.h"
+#include "Swap.h"
 
 using android::sp;
 using android::hardware::configureRpcThreadpool;
@@ -29,9 +31,11 @@ using android::hardware::joinRpcThreadpool;
 using vendor::eureka::hardware::parts::V1_0::BatteryStats;
 using vendor::eureka::hardware::parts::V1_0::DisplayConfigs;
 using vendor::eureka::hardware::parts::V1_0::FlashBrightness;
+using vendor::eureka::hardware::parts::V1_0::SwapOnData;
 using vendor::eureka::hardware::parts::V1_0::IBatteryStats;
 using vendor::eureka::hardware::parts::V1_0::IDisplayConfigs;
 using vendor::eureka::hardware::parts::V1_0::IFlashBrightness;
+using vendor::eureka::hardware::parts::V1_0::ISwapOnData;
 
 int main() {
   int ret;
@@ -39,6 +43,7 @@ int main() {
   android::sp<IFlashBrightness> mFlashLightService =
       FlashBrightness::getInstance();
   android::sp<IDisplayConfigs> mDisplayService = DisplayConfigs::getInstance();
+  android::sp<ISwapOnData> mSwapService = SwapOnData::getInstance();
   configureRpcThreadpool(4, true /*callerWillJoin*/);
 
   if (mBatteryService != nullptr) {
@@ -71,6 +76,16 @@ int main() {
   } else {
     ALOGE("Can't create instance of Display HAL, nullptr");
   }
+  if (mSwapService != nullptr) {
+    ret = mSwapService->registerAsService();
+    if (ret != 0) {
+      ALOGE("Can't register instance of Swap HAL, nullptr");
+    } else {
+      ALOGI("registered Swap HAL");
+    }
+  } else {
+    ALOGE("Can't create instance of Swap HAL, nullptr");
+  }
   joinRpcThreadpool();
 
   return -1; // should never get here

universal7885-common/hardware/interfaces/hardware/parts/1.0/default/vendor.eureka.hardware.parts@1.0-service.rc

@@ -2,6 +2,7 @@ service vendor.parts-hal /vendor/bin/vendor.eureka.hardware.parts@1.0-service
     interface vendor.eureka.hardware.parts@1.0::IBatteryStats default
     interface vendor.eureka.hardware.parts@1.0::IDisplayConfigs default
     interface vendor.eureka.hardware.parts@1.0::IFlashBrightness default
+    interface vendor.eureka.hardware.parts@1.0::ISwapOnData default
     class hal
     user root
     group root

universal7885-common/hardware/interfaces/hardware/parts/1.0/default/vendor.eureka.hardware.parts@1.0.xml

@@ -16,5 +16,9 @@
 			<name>IDisplayConfigs</name>
 			<instance>default</instance>
 		</interface>
+		<interface>
+			<name>ISwapOnData</name>
+			<instance>default</instance>
+		</interface>
 	</hal>
 </manifest>

universal7885-common/sepolicy/vendor/file_contexts

@@ -24,6 +24,7 @@
 /data/vendor/log(/.*)?                       u:object_r:log_vendor_data_file:s0
 /data/vendor/log/cbd(/.*)?                   u:object_r:log_cbd_vendor_data_file:s0
 /data/vendor/secradio(/.*)?                  u:object_r:radio_vendor_data_file:s0
+/data/swap(/.*)?			     u:object_r:parts_data_file:s0
 
 ### DEV
 /dev/block/platform/.+/by-name/boot          u:object_r:boot_block_device:s0

universal7885-common/sepolicy/vendor/hal_parts_default.te

@@ -24,3 +24,12 @@ allow hal_parts_default sysfs_virtual:dir search;
 # Display
 allow hal_parts_default sysfs_sec_touchscreen:dir search;
 allow hal_parts_default sysfs_touchscreen_writable:file rw_file_perms;
+
+# Swap
+type parts_data_file, file_type, data_file_type;
+allow hal_parts_default parts_data_file:dir rw_dir_perms;
+allow hal_parts_default parts_data_file:file rw_file_perms;
+allow hal_parts_default parts_data_file:file create_file_perms;
+allow hal_parts_default vendor_shell_exec:file rx_file_perms;
+allow hal_parts_default vendor_toolbox_exec:file rx_file_perms;
+allow hal_parts_default self:capability sys_admin;

universal7885-common/sepolicy/vendor/hwservice_contexts

@@ -8,6 +8,7 @@ vendor.lineage.power::ILineagePower			      u:object_r:hal_power_hwservice:s0
 vendor.eureka.hardware.parts::IBatteryStats u:object_r:hal_parts_hwservice:s0
 vendor.eureka.hardware.parts::IFlashBrightness u:object_r:hal_parts_hwservice:s0
 vendor.eureka.hardware.parts::IDisplayConfigs u:object_r:hal_parts_hwservice:s0
+vendor.eureka.hardware.parts::ISwapOnData u:object_r:hal_parts_hwservice:s0
 
 # FMRadio
 vendor.eureka.hardware.fmradio::IFMRadio u:object_r:hal_fmradio_hwservice:s0