commit d6d34c7ac609bcdd826fd1222261b29e664ce4e7
author The Android Automerger <android-build@google.com> Thu Jun 11 01:00:40 2015 -0700
committer The Android Automerger <android-build@google.com> Thu Jun 11 01:00:40 2015 -0700
tree f445696802ff01a687af0ce8efc34e06dc47a927
parent d7c9bf41daa865ca016dee12a68282ba457c31fb
parent 0460f697a18fa2ea2b98380e663b7d33d9cbdb00

merge in mnc-release history after reset to mnc-dev

device.h

diff --git a/device.h b/device.h
index dad8ccd..f74b6b0 100644
--- a/device.h
+++ b/device.h
@@ -91,13 +91,16 @@
     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_;

recovery.cpp

diff --git a/recovery.cpp b/recovery.cpp
index 80a8c7b..b7a5458 100644
--- a/recovery.cpp
+++ b/recovery.cpp
@@ -417,8 +417,7 @@
     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 @@
         copy_logs();
     }
 
-    return result;
+    return (result == 0);
 }
 
 static int
@@ -673,13 +672,13 @@
     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 @@
     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) {

updater/blockimg.c

diff --git a/updater/blockimg.c b/updater/blockimg.c
index 7b8721d..e184800 100644
--- a/updater/blockimg.c
+++ b/updater/blockimg.c
@@ -1404,6 +1404,7 @@
 static int PerformCommandErase(CommandParameters* params) {
     char* range = NULL;
     int i;
+    int j;
     int rc = -1;
     RangeSet* tgt = NULL;
     struct stat st;
@@ -1430,7 +1431,7 @@
     range = strtok_r(NULL, " ", &params->cpos);
 
     if (range == NULL) {
-        fprintf(stderr, "missing target blocks for zero\n");
+        fprintf(stderr, "missing target blocks for erase\n");
         goto pceout;
     }
 
@@ -1439,7 +1440,22 @@
     if (params->canwrite) {
         fprintf(stderr, " erasing %d blocks\n", tgt->size);
 
+        allocate(BLOCKSIZE, &params->buffer, &params->bufsize);
+        memset(params->buffer, 0, BLOCKSIZE);
+
         for (i = 0; i < tgt->count; ++i) {
+            // Always zero the blocks first to work around possibly flaky BLKDISCARD
+            // Bug: 20881595
+            if (!check_lseek(params->fd, (off64_t) tgt->pos[i * 2] * BLOCKSIZE, SEEK_SET)) {
+                goto pceout;
+            }
+
+            for (j = tgt->pos[i * 2]; j < tgt->pos[i * 2 + 1]; ++j) {
+                if (write_all(params->fd, params->buffer, BLOCKSIZE) == -1) {
+                    goto pceout;
+                }
+            }
+
             // offset in bytes
             blocks[0] = tgt->pos[i * 2] * (uint64_t) BLOCKSIZE;
             // length in bytes