Merge "vold: remove checkEncryption" am: 2d9777bfbf

Original change: https://android-review.googlesource.com/c/platform/system/vold/+/1363339

Change-Id: I4ffa4a351292c18dce51247d926ffe7efdbd5bea

Android.bp

@@ -109,7 +109,6 @@ cc_library_static {
     srcs: [
         "AppFuseUtil.cpp",
         "Benchmark.cpp",
-        "CheckEncryption.cpp",
         "Checkpoint.cpp",
         "CryptoType.cpp",
         "Devmapper.cpp",

CheckEncryption.cpp

@@ -1,149 +0,0 @@
-/*
- * Copyright (C) 2017 The Android Open Source Project
- *
- * 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 "CheckEncryption.h"
-#include "FileDeviceUtils.h"
-#include "Utils.h"
-#include "VolumeManager.h"
-
-#include <android-base/file.h>
-#include <android-base/logging.h>
-#include <android-base/unique_fd.h>
-#include <cutils/iosched_policy.h>
-#include <private/android_filesystem_config.h>
-
-#include <sstream>
-
-#include <sys/resource.h>
-#include <sys/time.h>
-#include <unistd.h>
-
-#include <assert.h>
-#include <fcntl.h>
-#include <linux/fs.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <unistd.h>
-
-#include <fcntl.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-
-using android::base::unique_fd;
-
-using android::base::ReadFileToString;
-using android::base::WriteStringToFile;
-
-namespace android {
-namespace vold {
-
-constexpr uint32_t max_extents = 32;
-constexpr size_t bytecount = 8;
-constexpr int repeats = 256;
-
-bool check_file(const std::string& needle) {
-    LOG(DEBUG) << "checkEncryption check_file: " << needle;
-    auto haystack = android::vold::BlockDeviceForPath(needle);
-    if (haystack.empty()) {
-        LOG(ERROR) << "Failed to find device for path: " << needle;
-        return false;
-    }
-
-    std::string randombytes;
-    if (ReadRandomBytes(bytecount, randombytes) != 0) {
-        LOG(ERROR) << "Failed to read random bytes";
-        return false;
-    }
-    std::string randomhex;
-    StrToHex(randombytes, randomhex);
-    std::ostringstream os;
-    for (int i = 0; i < repeats; i++) os << randomhex;
-    auto towrite = os.str();
-
-    if (access(needle.c_str(), F_OK) == 0) {
-        if (unlink(needle.c_str()) != 0) {
-            PLOG(ERROR) << "Failed to unlink " << needle;
-            return false;
-        }
-    }
-    LOG(DEBUG) << "Writing to " << needle;
-    if (!WriteStringToFile(towrite, needle)) {
-        PLOG(ERROR) << "Failed to write " << needle;
-        return false;
-    }
-    sync();
-
-    unique_fd haystack_fd(open(haystack.c_str(), O_RDONLY | O_CLOEXEC));
-    if (haystack_fd.get() == -1) {
-        PLOG(ERROR) << "Failed to open " << haystack;
-        return false;
-    }
-
-    auto fiemap = PathFiemap(needle, max_extents);
-
-    std::string area;
-    for (uint32_t i = 0; i < fiemap->fm_mapped_extents; i++) {
-        auto xt = &(fiemap->fm_extents[i]);
-        LOG(DEBUG) << "Extent " << i << " at " << xt->fe_physical << " length " << xt->fe_length;
-        if (lseek64(haystack_fd.get(), xt->fe_physical, SEEK_SET) == -1) {
-            PLOG(ERROR) << "Failed lseek";
-            return false;
-        }
-        auto toread = xt->fe_length;
-        while (toread > 0) {
-            char buf[BUFSIZ];
-            size_t wlen =
-                static_cast<size_t>(std::min(static_cast<typeof(toread)>(sizeof(buf)), toread));
-            auto l = read(haystack_fd.get(), buf, wlen);
-            if (l < 1) {
-                PLOG(ERROR) << "Failed read";
-                if (errno != EINTR) {
-                    return false;
-                }
-            }
-            area.append(buf, l);
-            toread -= l;
-        }
-    }
-
-    LOG(DEBUG) << "Searching " << area.size() << " bytes of " << needle;
-    LOG(DEBUG) << "First position of blob: " << area.find(randomhex);
-    return true;
-}
-
-int CheckEncryption(const std::string& path) {
-    auto deNeedle(path);
-    deNeedle += "/misc";
-    if (android::vold::PrepareDir(deNeedle, 01771, AID_SYSTEM, AID_MISC)) {
-        return -1;
-    }
-    deNeedle += "/vold";
-    if (android::vold::PrepareDir(deNeedle, 0700, AID_ROOT, AID_ROOT)) {
-        return -1;
-    }
-    deNeedle += "/checkEncryption";
-
-    auto neNeedle(path);
-    neNeedle += "/unencrypted/checkEncryption";
-
-    check_file(deNeedle);
-    check_file(neNeedle);
-
-    return 0;
-}
-
-}  // namespace vold
-}  // namespace android

CheckEncryption.h

@@ -1,31 +0,0 @@
-/*
- * Copyright (C) 2017 The Android Open Source Project
- *
- * 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.
- */
-
-#ifndef ANDROID_VOLD_CHECK_ENCRYPTION_H
-#define ANDROID_VOLD_CHECK_ENCRYPTION_H
-
-#include <string>
-
-namespace android {
-namespace vold {
-
-/* Check encryption of private volume mounted at the given path */
-int CheckEncryption(const std::string& path);
-
-}  // namespace vold
-}  // namespace android
-
-#endif

VoldNativeService.cpp

@@ -19,7 +19,6 @@
 #include "VoldNativeService.h"
 
 #include "Benchmark.h"
-#include "CheckEncryption.h"
 #include "Checkpoint.h"
 #include "FsCrypt.h"
 #include "IdleMaint.h"
@@ -340,17 +339,6 @@ binder::Status VoldNativeService::benchmark(
     return Ok();
 }
 
-binder::Status VoldNativeService::checkEncryption(const std::string& volId) {
-    ENFORCE_SYSTEM_OR_ROOT;
-    CHECK_ARGUMENT_ID(volId);
-    ACQUIRE_LOCK;
-
-    std::string path;
-    auto status = pathForVolId(volId, &path);
-    if (!status.isOk()) return status;
-    return translate(android::vold::CheckEncryption(path));
-}
-
 binder::Status VoldNativeService::moveStorage(
     const std::string& fromVolId, const std::string& toVolId,
     const android::sp<android::os::IVoldTaskListener>& listener) {

VoldNativeService.h

@@ -57,7 +57,6 @@ class VoldNativeService : public BinderService<VoldNativeService>, public os::Bn
     binder::Status format(const std::string& volId, const std::string& fsType);
     binder::Status benchmark(const std::string& volId,
                              const android::sp<android::os::IVoldTaskListener>& listener);
-    binder::Status checkEncryption(const std::string& volId);
 
     binder::Status moveStorage(const std::string& fromVolId, const std::string& toVolId,
                                const android::sp<android::os::IVoldTaskListener>& listener);

binder/android/os/IVold.aidl

@@ -45,7 +45,6 @@ interface IVold {
     void unmount(@utf8InCpp String volId);
     void format(@utf8InCpp String volId, @utf8InCpp String fsType);
     void benchmark(@utf8InCpp String volId, IVoldTaskListener listener);
-    void checkEncryption(@utf8InCpp String volId);
 
     void moveStorage(@utf8InCpp String fromVolId, @utf8InCpp String toVolId,
                      IVoldTaskListener listener);

vdc.cpp

@@ -103,8 +103,6 @@ int main(int argc, char** argv) {
         checkStatus(args, vold->shutdown());
     } else if (args[0] == "volume" && args[1] == "reset") {
         checkStatus(args, vold->reset());
-    } else if (args[0] == "cryptfs" && args[1] == "checkEncryption" && args.size() == 3) {
-        checkStatus(args, vold->checkEncryption(args[2]));
     } else if (args[0] == "cryptfs" && args[1] == "mountFstab" && args.size() == 4) {
         checkStatus(args, vold->mountFstab(args[2], args[3]));
     } else if (args[0] == "cryptfs" && args[1] == "encryptFstab" && args.size() == 4) {