From 0005f89c31dfc2ca9053512900571620a0eba842 Mon Sep 17 00:00:00 2001
From: Elliott Hughes <enh@google.com>
Date: Fri, 5 Jun 2015 17:59:56 -0700
Subject: Split WipeData into PreWipeData and PostWipeData.

Bug: http://b/21760064
Change-Id: Idde268fe4d7e27586ca4469de16783f1ffdc5069
(cherry picked from commit 945548ef7b3eee5dbfb46f6291465d4b0b6d02e1)
---
 device.h     | 17 ++++++++++-------
 recovery.cpp | 29 ++++++++++++-----------------
 2 files changed, 22 insertions(+), 24 deletions(-)

diff --git a/device.h b/device.h
index dad8ccd56..f74b6b047 100644
--- a/device.h
+++ b/device.h
@@ -91,13 +91,16 @@ class Device {
     static const int kHighlightDown = -3;
     static const int kInvokeItem = -4;
 
-    // Called when we do a wipe data/factory reset operation (either via a
-    // reboot from the main system with the --wipe_data flag, or when the
-    // user boots into recovery manually and selects the option from the
-    // menu.)  Can perform whatever device-specific wiping actions are
-    // needed.  Return 0 on success.  The userdata and cache partitions
-    // are erased AFTER this returns (whether it returns success or not).
-    virtual int WipeData() { return 0; }
+    // Called before and after we do a wipe data/factory reset operation,
+    // either via a reboot from the main system with the --wipe_data flag,
+    // or when the user boots into recovery image manually and selects the
+    // option from the menu, to perform whatever device-specific wiping
+    // actions are needed.
+    // Return true on success; returning false from PreWipeData will prevent
+    // the regular wipe, and returning false from PostWipeData will cause
+    // the wipe to be considered a failure.
+    virtual bool PreWipeData() { return true; }
+    virtual bool PostWipeData() { return true; }
 
   private:
     RecoveryUI* ui_;
diff --git a/recovery.cpp b/recovery.cpp
index 80a8c7ba5..b7a545898 100644
--- a/recovery.cpp
+++ b/recovery.cpp
@@ -417,8 +417,7 @@ typedef struct _saved_log_file {
     struct _saved_log_file* next;
 } saved_log_file;
 
-static int
-erase_volume(const char *volume) {
+static bool erase_volume(const char* volume) {
     bool is_cache = (strcmp(volume, CACHE_ROOT) == 0);
 
     ui->SetBackground(RecoveryUI::ERASING);
@@ -499,7 +498,7 @@ erase_volume(const char *volume) {
         copy_logs();
     }
 
-    return result;
+    return (result == 0);
 }
 
 static int
@@ -673,13 +672,13 @@ static bool wipe_data(int should_confirm, Device* device) {
     modified_flash = true;
 
     ui->Print("\n-- Wiping data...\n");
-    if (device->WipeData() == 0 && erase_volume("/data") == 0 && erase_volume("/cache") == 0) {
-        ui->Print("Data wipe complete.\n");
-        return true;
-    } else {
-        ui->Print("Data wipe failed.\n");
-        return false;
-    }
+    bool success =
+        device->PreWipeData() &&
+        erase_volume("/data") &&
+        erase_volume("/cache") &&
+        device->PostWipeData();
+    ui->Print("Data wipe %s.\n", success ? "complete" : "failed");
+    return success;
 }
 
 // Return true on success.
@@ -691,13 +690,9 @@ static bool wipe_cache(bool should_confirm, Device* device) {
     modified_flash = true;
 
     ui->Print("\n-- Wiping cache...\n");
-    if (erase_volume("/cache") == 0) {
-        ui->Print("Cache wipe complete.\n");
-        return true;
-    } else {
-        ui->Print("Cache wipe failed.\n");
-        return false;
-    }
+    bool success = erase_volume("/cache");
+    ui->Print("Cache wipe %s.\n", success ? "complete" : "failed");
+    return success;
 }
 
 static void choose_recovery_file(Device* device) {
-- 
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