Move wipe cache|data to libinstall

Therefore, libinstall becomes the sole owner to handle the request
from minadbd service.

The change also includes
1. move logging.cpp out of librecovery
2. drop the dependency on common.h
3. now it's more sensible to move the wipe_cache as part of
install_package. move the wipe_cache to the end of the function.

Bug: 130166585
Test: wipe data and cache from menu
Change-Id: I6f356dccdb38015c50acf756bac246f87c30fc1f

Android.bp

@@ -107,7 +107,6 @@ cc_binary {
     ],
 
     srcs: [
-        "logging.cpp",
         "recovery_main.cpp",
     ],
 
@@ -139,7 +138,6 @@ cc_binary {
     ],
 
     srcs: [
-        "logging.cpp",
         "recovery-persist.cpp",
     ],
 
@@ -167,7 +165,6 @@ cc_binary {
     ],
 
     srcs: [
-        "logging.cpp",
         "recovery-refresh.cpp",
     ],
 

install/Android.bp

@@ -65,6 +65,7 @@ cc_library_static {
         "install.cpp",
         "package.cpp",
         "verifier.cpp",
+        "wipe_data.cpp",
     ],
 
     shared_libs: [

install/adb_install.cpp

@@ -81,7 +81,7 @@ static bool WriteStatusToFd(MinadbdCommandStatus status, int fd) {
 }
 
 // Installs the package from FUSE. Returns true if the installation succeeds, and false otherwise.
-static bool AdbInstallPackageHandler(bool* wipe_cache, RecoveryUI* ui, int* result) {
+static bool AdbInstallPackageHandler(RecoveryUI* ui, int* result) {
   // How long (in seconds) we wait for the package path to be ready. It doesn't need to be too long
   // because the minadbd service has already issued an install command. FUSE_SIDELOAD_HOST_PATHNAME
   // will start to exist once the host connects and starts serving a package. Poll for its
@@ -99,7 +99,7 @@ static bool AdbInstallPackageHandler(bool* wipe_cache, RecoveryUI* ui, int* resu
         break;
       }
     }
-    *result = install_package(FUSE_SIDELOAD_HOST_PATHNAME, wipe_cache, false, 0, ui);
+    *result = install_package(FUSE_SIDELOAD_HOST_PATHNAME, false, false, 0, ui);
     break;
   }
 
@@ -280,7 +280,7 @@ static void CreateMinadbdServiceAndExecuteCommands(
   signal(SIGPIPE, SIG_DFL);
 }
 
-int apply_from_adb(bool* wipe_cache, RecoveryUI* ui) {
+int apply_from_adb(RecoveryUI* ui) {
   // Save the usb state to restore after the sideload operation.
   std::string usb_state = android::base::GetProperty("sys.usb.state", "none");
   // Clean up state and stop adbd.
@@ -295,8 +295,7 @@ int apply_from_adb(bool* wipe_cache, RecoveryUI* ui) {
 
   int install_result = INSTALL_ERROR;
   std::map<MinadbdCommands, CommandFunction> command_map{
-    { MinadbdCommands::kInstall,
-      std::bind(&AdbInstallPackageHandler, wipe_cache, ui, &install_result) },
+    { MinadbdCommands::kInstall, std::bind(&AdbInstallPackageHandler, ui, &install_result) },
   };
 
   CreateMinadbdServiceAndExecuteCommands(command_map);

install/fuse_sdcard_install.cpp

@@ -133,7 +133,7 @@ static bool StartSdcardFuse(const std::string& path) {
   return run_fuse_sideload(std::move(file_data_reader)) == 0;
 }
 
-int ApplyFromSdcard(Device* device, bool* wipe_cache, RecoveryUI* ui) {
+int ApplyFromSdcard(Device* device, RecoveryUI* ui) {
   if (ensure_path_mounted(SDCARD_ROOT) != 0) {
     LOG(ERROR) << "\n-- Couldn't mount " << SDCARD_ROOT << ".\n";
     return INSTALL_ERROR;
@@ -184,7 +184,7 @@ int ApplyFromSdcard(Device* device, bool* wipe_cache, RecoveryUI* ui) {
       }
     }
 
-    result = install_package(FUSE_SIDELOAD_HOST_PATHNAME, wipe_cache, false, 0 /*retry_count*/, ui);
+    result = install_package(FUSE_SIDELOAD_HOST_PATHNAME, false, false, 0 /*retry_count*/, ui);
     break;
   }
 

install/include/install/adb_install.h

@@ -18,4 +18,4 @@
 
 #include <recovery_ui/ui.h>
 
-int apply_from_adb(bool* wipe_cache, RecoveryUI* ui);
+int apply_from_adb(RecoveryUI* ui);

install/include/install/fuse_sdcard_install.h

@@ -19,4 +19,4 @@
 #include "recovery_ui/device.h"
 #include "recovery_ui/ui.h"
 
-int ApplyFromSdcard(Device* device, bool* wipe_cache, RecoveryUI* ui);
+int ApplyFromSdcard(Device* device, RecoveryUI* ui);

install/include/install/install.h

@@ -43,10 +43,11 @@ enum class OtaType {
   BRICK,
 };
 
-// Installs the given update package. If INSTALL_SUCCESS is returned and *wipe_cache is true on
-// exit, caller should wipe the cache partition.
-int install_package(const std::string& package, bool* wipe_cache, bool needs_mount, int retry_count,
-                    RecoveryUI* ui);
+// Installs the given update package. This function should also wipe the cache partition after a
+// successful installation if |should_wipe_cache| is true or an updater command asks to wipe the
+// cache.
+int install_package(const std::string& package, bool should_wipe_cache, bool needs_mount,
+                    int retry_count, RecoveryUI* ui);
 
 // Verifies the package by ota keys. Returns true if the package is verified successfully,
 // otherwise returns false.

install/include/install/wipe_data.h

@@ -0,0 +1,32 @@
+/*
+ * Copyright (C) 2019 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.
+ */
+
+#pragma once
+
+#include <functional>
+
+#include "recovery_ui/device.h"
+#include "recovery_ui/ui.h"
+
+struct selabel_handle;
+
+void SetWipeDataSehandle(selabel_handle* handle);
+
+// Returns true on success.
+bool WipeCache(RecoveryUI* ui, const std::function<bool()>& confirm);
+
+// Returns true on success.
+bool WipeData(Device* device, bool convert_fbe);

install/install.cpp

@@ -48,6 +48,7 @@
 
 #include "install/package.h"
 #include "install/verifier.h"
+#include "install/wipe_data.h"
 #include "otautil/error_code.h"
 #include "otautil/paths.h"
 #include "otautil/roots.h"
@@ -631,10 +632,9 @@ static int really_install_package(const std::string& path, bool* wipe_cache, boo
   return result;
 }
 
-int install_package(const std::string& path, bool* wipe_cache, bool needs_mount, int retry_count,
-                    RecoveryUI* ui) {
+int install_package(const std::string& path, bool should_wipe_cache, bool needs_mount,
+                    int retry_count, RecoveryUI* ui) {
   CHECK(!path.empty());
-  CHECK(wipe_cache != nullptr);
 
   auto start = std::chrono::system_clock::now();
 
@@ -647,8 +647,10 @@ int install_package(const std::string& path, bool* wipe_cache, bool needs_mount,
     LOG(ERROR) << "failed to set up expected mounts for install; aborting";
     result = INSTALL_ERROR;
   } else {
-    result = really_install_package(path, wipe_cache, needs_mount, &log_buffer, retry_count,
-                                    &max_temperature, ui);
+    bool updater_wipe_cache = false;
+    result = really_install_package(path, &updater_wipe_cache, needs_mount, &log_buffer,
+                                    retry_count, &max_temperature, ui);
+    should_wipe_cache = should_wipe_cache || updater_wipe_cache;
   }
 
   // Measure the time spent to apply OTA update in seconds.
@@ -703,6 +705,12 @@ int install_package(const std::string& path, bool* wipe_cache, bool needs_mount,
   // Write a copy into last_log.
   LOG(INFO) << log_content;
 
+  if (result == INSTALL_SUCCESS && should_wipe_cache) {
+    if (!WipeCache(ui, nullptr)) {
+      result = INSTALL_ERROR;
+    }
+  }
+
   return result;
 }
 

install/wipe_data.cpp

@@ -0,0 +1,190 @@
+/*
+ * Copyright (C) 2019 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 "install/wipe_data.h"
+
+#include <dirent.h>
+#include <errno.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/stat.h>
+
+#include <functional>
+#include <memory>
+#include <vector>
+
+#include <android-base/file.h>
+#include <android-base/logging.h>
+#include <android-base/stringprintf.h>
+
+#include "otautil/dirutil.h"
+#include "otautil/logging.h"
+#include "otautil/roots.h"
+#include "recovery_ui/ui.h"
+
+constexpr const char* CACHE_ROOT = "/cache";
+constexpr const char* DATA_ROOT = "/data";
+constexpr const char* METADATA_ROOT = "/metadata";
+
+constexpr const char* CACHE_LOG_DIR = "/cache/recovery";
+
+static struct selabel_handle* sehandle;
+
+void SetWipeDataSehandle(selabel_handle* handle) {
+  sehandle = handle;
+}
+
+struct saved_log_file {
+  std::string name;
+  struct stat sb;
+  std::string data;
+};
+
+static bool EraseVolume(const char* volume, RecoveryUI* ui, bool convert_fbe) {
+  bool is_cache = (strcmp(volume, CACHE_ROOT) == 0);
+  bool is_data = (strcmp(volume, DATA_ROOT) == 0);
+
+  ui->SetBackground(RecoveryUI::ERASING);
+  ui->SetProgressType(RecoveryUI::INDETERMINATE);
+
+  std::vector<saved_log_file> log_files;
+
+  if (is_cache) {
+    // If we're reformatting /cache, we load any past logs
+    // (i.e. "/cache/recovery/last_*") and the current log
+    // ("/cache/recovery/log") into memory, so we can restore them after
+    // the reformat.
+
+    ensure_path_mounted(volume);
+
+    struct dirent* de;
+    std::unique_ptr<DIR, decltype(&closedir)> d(opendir(CACHE_LOG_DIR), closedir);
+    if (d) {
+      while ((de = readdir(d.get())) != nullptr) {
+        if (strncmp(de->d_name, "last_", 5) == 0 || strcmp(de->d_name, "log") == 0) {
+          std::string path = android::base::StringPrintf("%s/%s", CACHE_LOG_DIR, de->d_name);
+
+          struct stat sb;
+          if (stat(path.c_str(), &sb) == 0) {
+            // truncate files to 512kb
+            if (sb.st_size > (1 << 19)) {
+              sb.st_size = 1 << 19;
+            }
+
+            std::string data(sb.st_size, '\0');
+            FILE* f = fopen(path.c_str(), "rbe");
+            fread(&data[0], 1, data.size(), f);
+            fclose(f);
+
+            log_files.emplace_back(saved_log_file{ path, sb, data });
+          }
+        }
+      }
+    } else {
+      if (errno != ENOENT) {
+        PLOG(ERROR) << "Failed to opendir " << CACHE_LOG_DIR;
+      }
+    }
+  }
+
+  ui->Print("Formatting %s...\n", volume);
+
+  ensure_path_unmounted(volume);
+
+  int result;
+  if (is_data && convert_fbe) {
+    constexpr const char* CONVERT_FBE_DIR = "/tmp/convert_fbe";
+    constexpr const char* CONVERT_FBE_FILE = "/tmp/convert_fbe/convert_fbe";
+    // Create convert_fbe breadcrumb file to signal init to convert to file based encryption, not
+    // full disk encryption.
+    if (mkdir(CONVERT_FBE_DIR, 0700) != 0) {
+      PLOG(ERROR) << "Failed to mkdir " << CONVERT_FBE_DIR;
+      return false;
+    }
+    FILE* f = fopen(CONVERT_FBE_FILE, "wbe");
+    if (!f) {
+      PLOG(ERROR) << "Failed to convert to file encryption";
+      return false;
+    }
+    fclose(f);
+    result = format_volume(volume, CONVERT_FBE_DIR);
+    remove(CONVERT_FBE_FILE);
+    rmdir(CONVERT_FBE_DIR);
+  } else {
+    result = format_volume(volume);
+  }
+
+  if (is_cache) {
+    // Re-create the log dir and write back the log entries.
+    if (ensure_path_mounted(CACHE_LOG_DIR) == 0 &&
+        mkdir_recursively(CACHE_LOG_DIR, 0777, false, sehandle) == 0) {
+      for (const auto& log : log_files) {
+        if (!android::base::WriteStringToFile(log.data, log.name, log.sb.st_mode, log.sb.st_uid,
+                                              log.sb.st_gid)) {
+          PLOG(ERROR) << "Failed to write to " << log.name;
+        }
+      }
+    } else {
+      PLOG(ERROR) << "Failed to mount / create " << CACHE_LOG_DIR;
+    }
+
+    // Any part of the log we'd copied to cache is now gone.
+    // Reset the pointer so we copy from the beginning of the temp
+    // log.
+    reset_tmplog_offset();
+    copy_logs(true /* save_current_log */, true /* has_cache */, sehandle);
+  }
+
+  return (result == 0);
+}
+
+bool WipeCache(RecoveryUI* ui, const std::function<bool()>& confirm_func) {
+  bool has_cache = volume_for_mount_point("/cache") != nullptr;
+  if (!has_cache) {
+    ui->Print("No /cache partition found.\n");
+    return false;
+  }
+
+  if (confirm_func && !confirm_func()) {
+    return false;
+  }
+
+  ui->Print("\n-- Wiping cache...\n");
+  bool success = EraseVolume("/cache", ui, false);
+  ui->Print("Cache wipe %s.\n", success ? "complete" : "failed");
+  return success;
+}
+
+bool WipeData(Device* device, bool convert_fbe) {
+  RecoveryUI* ui = device->GetUI();
+  ui->Print("\n-- Wiping data...\n");
+  bool success = device->PreWipeData();
+  if (success) {
+    success &= EraseVolume(DATA_ROOT, ui, convert_fbe);
+    bool has_cache = volume_for_mount_point("/cache") != nullptr;
+    if (has_cache) {
+      success &= EraseVolume(CACHE_ROOT, ui, false);
+    }
+    if (volume_for_mount_point(METADATA_ROOT) != nullptr) {
+      success &= EraseVolume(METADATA_ROOT, ui, false);
+    }
+  }
+  if (success) {
+    success &= device->PostWipeData();
+  }
+  ui->Print("Data wipe %s.\n", success ? "complete" : "failed");
+  return success;
+}

otautil/Android.bp

@@ -40,6 +40,7 @@ cc_library_static {
         android: {
             srcs: [
                 "dirutil.cpp",
+                "logging.cpp",
                 "mounts.cpp",
                 "parse_install_logs.cpp",
                 "roots.cpp",

otautil/include/otautil/logging.h

@@ -26,6 +26,8 @@
 
 static constexpr int KEEP_LOG_COUNT = 10;
 
+struct selabel_handle;
+
 ssize_t logbasename(log_id_t id, char prio, const char* filename, const char* buf, size_t len,
                     void* arg);
 
@@ -41,8 +43,7 @@ void rotate_logs(const char* last_log_file, const char* last_kmsg_file);
 void check_and_fclose(FILE* fp, const std::string& name);
 
 void copy_log_file_to_pmsg(const std::string& source, const std::string& destination);
-void copy_log_file(const std::string& source, const std::string& destination, bool append);
-void copy_logs(bool modified_flash, bool has_cache);
+void copy_logs(bool save_current_log, bool has_cache, const selabel_handle* sehandle);
 void reset_tmplog_offset();
 
 void save_kernel_log(const char* destination);

otautil/logging.cpp

@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-#include "logging.h"
+#include "otautil/logging.h"
 
 #include <stdio.h>
 #include <string.h>
@@ -29,8 +29,8 @@
 #include <android-base/stringprintf.h>
 #include <private/android_filesystem_config.h> /* for AID_SYSTEM */
 #include <private/android_logger.h>            /* private pmsg functions */
+#include <selinux/label.h>
 
-#include "common.h"
 #include "otautil/dirutil.h"
 #include "otautil/paths.h"
 #include "otautil/roots.h"
@@ -45,7 +45,7 @@ static const std::string LAST_LOG_FILTER = "recovery/last_log";
 
 // fopen(3)'s the given file, by mounting volumes and making parent dirs as necessary. Returns the
 // file pointer, or nullptr on error.
-static FILE* fopen_path(const std::string& path, const char* mode) {
+static FILE* fopen_path(const std::string& path, const char* mode, const selabel_handle* sehandle) {
   if (ensure_path_mounted(path) != 0) {
     LOG(ERROR) << "Can't mount " << path;
     return nullptr;
@@ -165,8 +165,9 @@ void reset_tmplog_offset() {
   tmplog_offset = 0;
 }
 
-void copy_log_file(const std::string& source, const std::string& destination, bool append) {
-  FILE* dest_fp = fopen_path(destination, append ? "ae" : "we");
+static void copy_log_file(const std::string& source, const std::string& destination, bool append,
+                          const selabel_handle* sehandle) {
+  FILE* dest_fp = fopen_path(destination, append ? "ae" : "we", sehandle);
   if (dest_fp == nullptr) {
     PLOG(ERROR) << "Can't open " << destination;
   } else {
@@ -189,11 +190,11 @@ void copy_log_file(const std::string& source, const std::string& destination, bo
   }
 }
 
-void copy_logs(bool modified_flash, bool has_cache) {
-  // We only rotate and record the log of the current session if there are actual attempts to modify
-  // the flash, such as wipes, installs from BCB or menu selections. This is to avoid unnecessary
+void copy_logs(bool save_current_log, bool has_cache, const selabel_handle* sehandle) {
+  // We only rotate and record the log of the current session if explicitly requested. This usually
+  // happens after wipes, installation from BCB or menu selections. This is to avoid unnecessary
   // rotation (and possible deletion) of log files, if it does not do anything loggable.
-  if (!modified_flash) {
+  if (!save_current_log) {
     return;
   }
 
@@ -211,9 +212,9 @@ void copy_logs(bool modified_flash, bool has_cache) {
   rotate_logs(LAST_LOG_FILE, LAST_KMSG_FILE);
 
   // Copy logs to cache so the system can find out what happened.
-  copy_log_file(Paths::Get().temporary_log_file(), LOG_FILE, true);
-  copy_log_file(Paths::Get().temporary_log_file(), LAST_LOG_FILE, false);
-  copy_log_file(Paths::Get().temporary_install_file(), LAST_INSTALL_FILE, false);
+  copy_log_file(Paths::Get().temporary_log_file(), LOG_FILE, true, sehandle);
+  copy_log_file(Paths::Get().temporary_log_file(), LAST_LOG_FILE, false, sehandle);
+  copy_log_file(Paths::Get().temporary_install_file(), LAST_INSTALL_FILE, false, sehandle);
   save_kernel_log(LAST_KMSG_FILE);
   chmod(LOG_FILE, 0600);
   chown(LOG_FILE, AID_SYSTEM, AID_SYSTEM);

recovery-persist.cpp

@@ -43,7 +43,7 @@
 #include <metricslogger/metrics_logger.h>
 #include <private/android_logger.h> /* private pmsg functions */
 
-#include "logging.h"
+#include "otautil/logging.h"
 #include "otautil/parse_install_logs.h"
 
 constexpr const char* LAST_LOG_FILE = "/data/misc/recovery/last_log";

recovery-refresh.cpp

@@ -42,7 +42,7 @@
 
 #include <private/android_logger.h> /* private pmsg functions */
 
-#include "logging.h"
+#include "otautil/logging.h"
 
 int main(int argc, char **argv) {
     static const char filter[] = "recovery/";

recovery.cpp

@@ -27,7 +27,6 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include <sys/stat.h>
 #include <sys/types.h>
 #include <unistd.h>
 
@@ -55,30 +54,27 @@
 #include "install/fuse_sdcard_install.h"
 #include "install/install.h"
 #include "install/package.h"
-#include "logging.h"
-#include "otautil/dirutil.h"
+#include "install/wipe_data.h"
 #include "otautil/error_code.h"
+#include "otautil/logging.h"
 #include "otautil/paths.h"
 #include "otautil/roots.h"
 #include "otautil/sysutil.h"
 #include "recovery_ui/screen_ui.h"
 #include "recovery_ui/ui.h"
 
-static constexpr const char* CACHE_LOG_DIR = "/cache/recovery";
 static constexpr const char* COMMAND_FILE = "/cache/recovery/command";
 static constexpr const char* LAST_KMSG_FILE = "/cache/recovery/last_kmsg";
 static constexpr const char* LAST_LOG_FILE = "/cache/recovery/last_log";
 static constexpr const char* LOCALE_FILE = "/cache/recovery/last_locale";
 
 static constexpr const char* CACHE_ROOT = "/cache";
-static constexpr const char* DATA_ROOT = "/data";
-static constexpr const char* METADATA_ROOT = "/metadata";
 
 // We define RECOVERY_API_VERSION in Android.mk, which will be picked up by build system and packed
 // into target_files.zip. Assert the version defined in code and in Android.mk are consistent.
 static_assert(kRecoveryApiVersion == RECOVERY_API_VERSION, "Mismatching recovery API versions.");
 
-static bool modified_flash = false;
+static bool save_current_log = false;
 std::string stage;
 const char* reason = nullptr;
 
@@ -148,7 +144,7 @@ static void finish_recovery() {
     }
   }
 
-  copy_logs(modified_flash, has_cache);
+  copy_logs(save_current_log, has_cache, sehandle);
 
   // Reset to normal system boot so recovery won't cycle indefinitely.
   std::string err;
@@ -167,110 +163,6 @@ static void finish_recovery() {
   sync();  // For good measure.
 }
 
-struct saved_log_file {
-  std::string name;
-  struct stat sb;
-  std::string data;
-};
-
-static bool erase_volume(const char* volume) {
-  bool is_cache = (strcmp(volume, CACHE_ROOT) == 0);
-  bool is_data = (strcmp(volume, DATA_ROOT) == 0);
-
-  ui->SetBackground(RecoveryUI::ERASING);
-  ui->SetProgressType(RecoveryUI::INDETERMINATE);
-
-  std::vector<saved_log_file> log_files;
-
-  if (is_cache) {
-    // If we're reformatting /cache, we load any past logs
-    // (i.e. "/cache/recovery/last_*") and the current log
-    // ("/cache/recovery/log") into memory, so we can restore them after
-    // the reformat.
-
-    ensure_path_mounted(volume);
-
-    struct dirent* de;
-    std::unique_ptr<DIR, decltype(&closedir)> d(opendir(CACHE_LOG_DIR), closedir);
-    if (d) {
-      while ((de = readdir(d.get())) != nullptr) {
-        if (strncmp(de->d_name, "last_", 5) == 0 || strcmp(de->d_name, "log") == 0) {
-          std::string path = android::base::StringPrintf("%s/%s", CACHE_LOG_DIR, de->d_name);
-
-          struct stat sb;
-          if (stat(path.c_str(), &sb) == 0) {
-            // truncate files to 512kb
-            if (sb.st_size > (1 << 19)) {
-              sb.st_size = 1 << 19;
-            }
-
-            std::string data(sb.st_size, '\0');
-            FILE* f = fopen(path.c_str(), "rbe");
-            fread(&data[0], 1, data.size(), f);
-            fclose(f);
-
-            log_files.emplace_back(saved_log_file{ path, sb, data });
-          }
-        }
-      }
-    } else {
-      if (errno != ENOENT) {
-        PLOG(ERROR) << "Failed to opendir " << CACHE_LOG_DIR;
-      }
-    }
-  }
-
-  ui->Print("Formatting %s...\n", volume);
-
-  ensure_path_unmounted(volume);
-
-  int result;
-  if (is_data && reason && strcmp(reason, "convert_fbe") == 0) {
-    static constexpr const char* CONVERT_FBE_DIR = "/tmp/convert_fbe";
-    static constexpr const char* CONVERT_FBE_FILE = "/tmp/convert_fbe/convert_fbe";
-    // Create convert_fbe breadcrumb file to signal init to convert to file based encryption, not
-    // full disk encryption.
-    if (mkdir(CONVERT_FBE_DIR, 0700) != 0) {
-      PLOG(ERROR) << "Failed to mkdir " << CONVERT_FBE_DIR;
-      return false;
-    }
-    FILE* f = fopen(CONVERT_FBE_FILE, "wbe");
-    if (!f) {
-      PLOG(ERROR) << "Failed to convert to file encryption";
-      return false;
-    }
-    fclose(f);
-    result = format_volume(volume, CONVERT_FBE_DIR);
-    remove(CONVERT_FBE_FILE);
-    rmdir(CONVERT_FBE_DIR);
-  } else {
-    result = format_volume(volume);
-  }
-
-  if (is_cache) {
-    // Re-create the log dir and write back the log entries.
-    if (ensure_path_mounted(CACHE_LOG_DIR) == 0 &&
-        mkdir_recursively(CACHE_LOG_DIR, 0777, false, sehandle) == 0) {
-      for (const auto& log : log_files) {
-        if (!android::base::WriteStringToFile(log.data, log.name, log.sb.st_mode, log.sb.st_uid,
-                                              log.sb.st_gid)) {
-          PLOG(ERROR) << "Failed to write to " << log.name;
-        }
-      }
-    } else {
-      PLOG(ERROR) << "Failed to mount / create " << CACHE_LOG_DIR;
-    }
-
-    // Any part of the log we'd copied to cache is now gone.
-    // Reset the pointer so we copy from the beginning of the temp
-    // log.
-    reset_tmplog_offset();
-    copy_logs(modified_flash, has_cache);
-  }
-
-  return (result == 0);
-}
-
 static bool yes_no(Device* device, const char* question1, const char* question2) {
   std::vector<std::string> headers{ question1, question2 };
   std::vector<std::string> items{ " No", " Yes" };
@@ -292,28 +184,6 @@ static bool ask_to_wipe_data(Device* device) {
   return (chosen_item == 1);
 }
 
-// Return true on success.
-static bool wipe_data(Device* device) {
-    modified_flash = true;
-
-    ui->Print("\n-- Wiping data...\n");
-    bool success = device->PreWipeData();
-    if (success) {
-      success &= erase_volume(DATA_ROOT);
-      if (has_cache) {
-        success &= erase_volume(CACHE_ROOT);
-      }
-      if (volume_for_mount_point(METADATA_ROOT) != nullptr) {
-        success &= erase_volume(METADATA_ROOT);
-      }
-    }
-    if (success) {
-      success &= device->PostWipeData();
-    }
-    ui->Print("Data wipe %s.\n", success ? "complete" : "failed");
-    return success;
-}
-
 static InstallResult prompt_and_wipe_data(Device* device) {
   // Use a single string and let ScreenRecoveryUI handles the wrapping.
   std::vector<std::string> wipe_data_menu_headers{
@@ -341,7 +211,8 @@ static InstallResult prompt_and_wipe_data(Device* device) {
     }
 
     if (ask_to_wipe_data(device)) {
-      if (wipe_data(device)) {
+      bool convert_fbe = reason && strcmp(reason, "convert_fbe") == 0;
+      if (WipeData(device, convert_fbe)) {
         return INSTALL_SUCCESS;
       } else {
         return INSTALL_ERROR;
@@ -350,25 +221,6 @@ static InstallResult prompt_and_wipe_data(Device* device) {
   }
 }
 
-// Return true on success.
-static bool wipe_cache(bool should_confirm, Device* device) {
-    if (!has_cache) {
-        ui->Print("No /cache partition found.\n");
-        return false;
-    }
-
-    if (should_confirm && !yes_no(device, "Wipe cache?", "  THIS CAN NOT BE UNDONE!")) {
-        return false;
-    }
-
-    modified_flash = true;
-
-    ui->Print("\n-- Wiping cache...\n");
-    bool success = erase_volume("/cache");
-    ui->Print("Cache wipe %s.\n", success ? "complete" : "failed");
-    return success;
-}
-
 // Secure-wipe a given partition. It uses BLKSECDISCARD, if supported. Otherwise, it goes with
 // BLKDISCARD (if device supports BLKDISCARDZEROES) or BLKZEROOUT.
 static bool secure_wipe_partition(const std::string& partition) {
@@ -653,7 +505,6 @@ static Device::BuiltinAction prompt_and_wait(Device* device, int status) {
             ? Device::REBOOT
             : device->InvokeMenuItem(chosen_item);
 
-    bool should_wipe_cache = false;
     switch (chosen_action) {
       case Device::NO_ACTION:
         break;
@@ -666,41 +517,40 @@ static Device::BuiltinAction prompt_and_wait(Device* device, int status) {
         return chosen_action;
 
       case Device::WIPE_DATA:
+        save_current_log = true;
         if (ui->IsTextVisible()) {
           if (ask_to_wipe_data(device)) {
-            wipe_data(device);
+            WipeData(device, false);
           }
         } else {
-          wipe_data(device);
+          WipeData(device, false);
           return Device::NO_ACTION;
         }
         break;
 
-      case Device::WIPE_CACHE:
-        wipe_cache(ui->IsTextVisible(), device);
+      case Device::WIPE_CACHE: {
+        save_current_log = true;
+        std::function<bool()> confirm_func = [&device]() {
+          return yes_no(device, "Wipe cache?", "  THIS CAN NOT BE UNDONE!");
+        };
+        WipeCache(ui, ui->IsTextVisible() ? confirm_func : nullptr);
         if (!ui->IsTextVisible()) return Device::NO_ACTION;
         break;
-
+      }
       case Device::APPLY_ADB_SIDELOAD:
       case Device::APPLY_SDCARD: {
-        modified_flash = true;
+        save_current_log = true;
         bool adb = (chosen_action == Device::APPLY_ADB_SIDELOAD);
         if (adb) {
-          status = apply_from_adb(&should_wipe_cache, ui);
+          status = apply_from_adb(ui);
         } else {
-          status = ApplyFromSdcard(device, &should_wipe_cache, ui);
-        }
-
-        if (status == INSTALL_SUCCESS && should_wipe_cache) {
-          if (!wipe_cache(false, device)) {
-            status = INSTALL_ERROR;
-          }
+          status = ApplyFromSdcard(device, ui);
         }
 
         if (status != INSTALL_SUCCESS) {
           ui->SetBackground(RecoveryUI::ERROR);
           ui->Print("Installation aborted.\n");
-          copy_logs(modified_flash, has_cache);
+          copy_logs(save_current_log, has_cache, sehandle);
         } else if (!ui->IsTextVisible()) {
           return Device::NO_ACTION;  // reboot if logs aren't visible
         } else {
@@ -987,7 +837,7 @@ Device::BuiltinAction start_recovery(Device* device, const std::vector<std::stri
   if (update_package != nullptr) {
     // It's not entirely true that we will modify the flash. But we want
     // to log the update attempt since update_package is non-NULL.
-    modified_flash = true;
+    save_current_log = true;
 
     int required_battery_level;
     if (retry_count == 0 && !is_battery_ok(&required_battery_level)) {
@@ -1009,11 +859,7 @@ Device::BuiltinAction start_recovery(Device* device, const std::vector<std::stri
         set_retry_bootloader_message(retry_count + 1, args);
       }
 
-      modified_flash = true;
-      status = install_package(update_package, &should_wipe_cache, true, retry_count, ui);
-      if (status == INSTALL_SUCCESS && should_wipe_cache) {
-        wipe_cache(false, device);
-      }
+      status = install_package(update_package, should_wipe_cache, true, retry_count, ui);
       if (status != INSTALL_SUCCESS) {
         ui->Print("Installation aborted.\n");
 
@@ -1021,7 +867,7 @@ Device::BuiltinAction start_recovery(Device* device, const std::vector<std::stri
         // RETRY_LIMIT times before we abandon this OTA update.
         static constexpr int RETRY_LIMIT = 4;
         if (status == INSTALL_RETRY && retry_count < RETRY_LIMIT) {
-          copy_logs(modified_flash, has_cache);
+          copy_logs(save_current_log, has_cache, sehandle);
           retry_count += 1;
           set_retry_bootloader_message(retry_count, args);
           // Print retry count on screen.
@@ -1045,12 +891,14 @@ Device::BuiltinAction start_recovery(Device* device, const std::vector<std::stri
       }
     }
   } else if (should_wipe_data) {
-    if (!wipe_data(device)) {
+    save_current_log = true;
+    bool convert_fbe = reason && strcmp(reason, "convert_fbe") == 0;
+    if (!WipeData(device, convert_fbe)) {
       status = INSTALL_ERROR;
     }
   } else if (should_prompt_and_wipe_data) {
     // Trigger the logging to capture the cause, even if user chooses to not wipe data.
-    modified_flash = true;
+    save_current_log = true;
 
     ui->ShowText(true);
     ui->SetBackground(RecoveryUI::ERROR);
@@ -1059,7 +907,8 @@ Device::BuiltinAction start_recovery(Device* device, const std::vector<std::stri
       ui->ShowText(false);
     }
   } else if (should_wipe_cache) {
-    if (!wipe_cache(false, device)) {
+    save_current_log = true;
+    if (!WipeCache(ui, nullptr)) {
       status = INSTALL_ERROR;
     }
   } else if (should_wipe_ab) {
@@ -1073,15 +922,11 @@ Device::BuiltinAction start_recovery(Device* device, const std::vector<std::stri
     // sideload finishes even if there are errors. Unless one turns on the
     // text display during the installation. This is to enable automated
     // testing.
+    save_current_log = true;
     if (!sideload_auto_reboot) {
       ui->ShowText(true);
     }
-    status = apply_from_adb(&should_wipe_cache, ui);
-    if (status == INSTALL_SUCCESS && should_wipe_cache) {
-      if (!wipe_cache(false, device)) {
-        status = INSTALL_ERROR;
-      }
-    }
+    status = apply_from_adb(ui);
     ui->Print("\nInstall from ADB complete (status: %d).\n", status);
     if (sideload_auto_reboot) {
       ui->Print("Rebooting automatically.\n");

recovery_main.cpp

@@ -50,7 +50,8 @@
 
 #include "common.h"
 #include "fastboot/fastboot.h"
-#include "logging.h"
+#include "install/wipe_data.h"
+#include "otautil/logging.h"
 #include "otautil/paths.h"
 #include "otautil/roots.h"
 #include "otautil/sysutil.h"
@@ -434,6 +435,8 @@ int main(int argc, char** argv) {
     ui->Print("Warning: No file_contexts\n");
   }
 
+  SetWipeDataSehandle(sehandle);
+
   std::atomic<Device::BuiltinAction> action;
   std::thread listener_thread(ListenRecoverySocket, ui, std::ref(action));
   listener_thread.detach();