M58: arc: Set migration success notification pref.

chrome/browser/chromeos/arc/arc_util.cc

 // Copyright 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/chromeos/arc/arc_util.h"
 
+#include <linux/magic.h>
+#include <sys/statfs.h>
+
+#include "base/callback.h"
+#include "base/files/file_path.h"
 #include "base/logging.h"
+#include "base/sys_info.h"
+#include "base/task_scheduler/post_task.h"
+#include "base/threading/thread_restrictions.h"
 #include "chrome/browser/chromeos/arc/arc_session_manager.h"
 #include "chrome/browser/chromeos/login/user_flow.h"
 #include "chrome/browser/chromeos/login/users/chrome_user_manager.h"
 #include "chrome/browser/chromeos/profiles/profile_helper.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/common/pref_names.h"
 #include "components/arc/arc_util.h"
 #include "components/prefs/pref_service.h"
+#include "components/user_manager/known_user.h"
 #include "components/user_manager/user.h"
 #include "components/user_manager/user_manager.h"
 
 namespace arc {
 
 namespace {
 
+constexpr char kLsbReleaseArcVersionKey[] = "CHROMEOS_ARC_ANDROID_SDK_VERSION";
+constexpr char kAndroidMSdkVersion[] = "23";
+
 // Let IsAllowedForProfile() return "false" for any profile.
 bool g_disallow_for_testing = false;
 
+// Returns whether ARC can run on the filesystem mounted at |path|.
+// This function should run only on threads where IO operations are allowed.
+bool IsArcCompatibleFilesystem(const base::FilePath& path) {
+  base::ThreadRestrictions::AssertIOAllowed();
+
+  // If it can be verified it is not on ecryptfs, then it is ok.
+  struct statfs statfs_buf;
+  if (statfs(path.value().c_str(), &statfs_buf) < 0)
+    return false;
+  return statfs_buf.f_type != ECRYPTFS_SUPER_MAGIC;
+}
+
+// Stores the result of IsArcCompatibleFilesystem posted back from the blocking
+// task runner.
+void StoreCompatibilityCheckResult(const AccountId& account_id,
+                                   const base::Closure& callback,
+                                   bool is_compatible) {
+  if (is_compatible) {
+    user_manager::known_user::SetIntegerPref(
+        account_id, prefs::kArcCompatibleFilesystemChosen,
+        arc::kFileSystemCompatible);
+  }
+  callback.Run();
+}
+
+FileSystemCompatibilityState GetFileSystemCompatibilityPref(
+    const AccountId& account_id) {
+  int pref_value = kFileSystemIncompatible;
+  user_manager::known_user::GetIntegerPref(
+      account_id, prefs::kArcCompatibleFilesystemChosen, &pref_value);
+  return static_cast<FileSystemCompatibilityState>(pref_value);
+}
+
 }  // namespace
 
 bool IsArcAllowedForProfile(const Profile* profile) {
   if (g_disallow_for_testing) {
     VLOG(1) << "ARC is disallowed for testing.";
     return false;
   }
 
   // ARC Kiosk can be enabled even if ARC is not yet supported on the device.
   // In that case IsArcKioskMode() should return true as profile is already
@@ skipping 91 matching lines @@
       return;
     if (enabled)
       arc_session_manager->RequestEnable();
     else
       arc_session_manager->RequestDisable();
     return;
   }
   profile->GetPrefs()->SetBoolean(prefs::kArcEnabled, enabled);
 }
 
+void UpdateArcFileSystemCompatibilityPrefIfNeeded(
+    const AccountId& account_id,
+    const base::FilePath& profile_path,
+    const base::Closure& callback) {
+  DCHECK(!callback.is_null());
+
+  // If ARC is not available, skip the check.
+  if (!IsArcAvailable()) {
+    callback.Run();
+    return;
+  }
+
+  // If the compatibility has been already confirmed, skip the check.
+  if (GetFileSystemCompatibilityPref(account_id) != kFileSystemIncompatible) {
+    callback.Run();
+    return;
+  }
+
+  // Otherwise, check the underlying filesystem.
+  base::PostTaskWithTraitsAndReplyWithResult(
+      FROM_HERE,
+      base::TaskTraits()
+          .WithShutdownBehavior(
+              base::TaskShutdownBehavior::CONTINUE_ON_SHUTDOWN)
+          .WithPriority(base::TaskPriority::USER_BLOCKING)
+          .MayBlock(),
+      base::Bind(&IsArcCompatibleFilesystem, profile_path),
+      base::Bind(&StoreCompatibilityCheckResult, account_id, callback));
+}
+
 }  // namespace arc