diff --git a/adb/transport.cpp b/adb/transport.cpp
index 6020ad5..f8c8c61 100644
--- a/adb/transport.cpp
+++ b/adb/transport.cpp
@@ -788,9 +788,7 @@
     // Local static allocation to avoid global non-POD variables.
     static const FeatureSet* features = new FeatureSet{
         kFeatureShell2,
-        // Internal master has 'cmd'. AOSP master doesn't.
-        // kFeatureCmd
-
+        kFeatureCmd
         // Increment ADB_SERVER_VERSION whenever the feature list changes to
         // make sure that the adb client and server features stay in sync
         // (http://b/24370690).
diff --git a/fastboot/fastboot.cpp b/fastboot/fastboot.cpp
index 4573da0..e409bf6 100644
--- a/fastboot/fastboot.cpp
+++ b/fastboot/fastboot.cpp
@@ -84,6 +84,8 @@
 static unsigned second_offset  = 0x00f00000;
 static unsigned tags_offset    = 0x00000100;
 
+static const std::string convert_fbe_marker_filename("convert_fbe");
+
 enum fb_buffer_type {
     FB_BUFFER,
     FB_BUFFER_SPARSE,
@@ -329,11 +331,17 @@
             "                                           given by --slot. If slots are not\n"
             "                                           supported, this does nothing. This will\n"
             "                                           run after all non-reboot commands.\n"
+#if !defined(_WIN32)
+            "  --wipe-and-use-fbe                       On devices which support it,\n"
+            "                                           erase userdata and cache, and\n"
+            "                                           enable file-based encryption\n"
+#endif
             "  --unbuffered                             Do not buffer input or output.\n"
             "  --version                                Display version.\n"
             "  -h, --help                               show this message.\n"
         );
 }
+
 static void* load_bootable_image(const char* kernel, const char* ramdisk,
                                  const char* secondstage, int64_t* sz,
                                  const char* cmdline) {
@@ -453,8 +461,60 @@
 
 #define tmpfile win32_tmpfile
 
+static std::string make_temporary_directory() {
+    fprintf(stderr, "make_temporary_directory not supported under Windows, sorry!");
+    return "";
+}
+
+#else
+
+static std::string make_temporary_directory() {
+    const char *tmpdir = getenv("TMPDIR");
+    if (tmpdir == nullptr) {
+        tmpdir = P_tmpdir;
+    }
+    std::string result = std::string(tmpdir) + "/fastboot_userdata_XXXXXX";
+    if (mkdtemp(&result[0]) == NULL) {
+        fprintf(stderr, "Unable to create temporary directory: %s\n",
+            strerror(errno));
+        return "";
+    }
+    return result;
+}
+
 #endif
 
+static std::string create_fbemarker_tmpdir() {
+    std::string dir = make_temporary_directory();
+    if (dir.empty()) {
+        fprintf(stderr, "Unable to create local temp directory for FBE marker\n");
+        return "";
+    }
+    std::string marker_file = dir + "/" + convert_fbe_marker_filename;
+    int fd = open(marker_file.c_str(), O_CREAT | O_WRONLY | O_CLOEXEC, 0666);
+    if (fd == -1) {
+        fprintf(stderr, "Unable to create FBE marker file %s locally: %d, %s\n",
+            marker_file.c_str(), errno, strerror(errno));
+        return "";
+    }
+    close(fd);
+    return dir;
+}
+
+static void delete_fbemarker_tmpdir(const std::string& dir) {
+    std::string marker_file = dir + "/" + convert_fbe_marker_filename;
+    if (unlink(marker_file.c_str()) == -1) {
+        fprintf(stderr, "Unable to delete FBE marker file %s locally: %d, %s\n",
+            marker_file.c_str(), errno, strerror(errno));
+        return;
+    }
+    if (rmdir(dir.c_str()) == -1) {
+        fprintf(stderr, "Unable to delete FBE marker directory %s locally: %d, %s\n",
+            dir.c_str(), errno, strerror(errno));
+        return;
+    }
+}
+
 static int unzip_to_file(ZipArchiveHandle zip, char* entry_name) {
     FILE* fp = tmpfile();
     if (fp == nullptr) {
@@ -1040,7 +1100,8 @@
 
 static void fb_perform_format(Transport* transport,
                               const char* partition, int skip_if_not_supported,
-                              const char* type_override, const char* size_override) {
+                              const char* type_override, const char* size_override,
+                              const std::string& initial_dir) {
     std::string partition_type, partition_size;
 
     struct fastboot_buffer buf;
@@ -1104,7 +1165,7 @@
     }
 
     fd = fileno(tmpfile());
-    if (fs_generator_generate(gen, fd, size)) {
+    if (fs_generator_generate(gen, fd, size, initial_dir)) {
         fprintf(stderr, "Cannot generate image: %s\n", strerror(errno));
         close(fd);
         return;
@@ -1133,6 +1194,7 @@
     bool wants_reboot_bootloader = false;
     bool wants_set_active = false;
     bool erase_first = true;
+    bool set_fbe_marker = false;
     void *data;
     int64_t sz;
     int longindex;
@@ -1155,6 +1217,9 @@
         {"slot", required_argument, 0, 0},
         {"set_active", optional_argument, 0, 'a'},
         {"set-active", optional_argument, 0, 'a'},
+#if !defined(_WIN32)
+        {"wipe-and-use-fbe", no_argument, 0, 0},
+#endif
         {0, 0, 0, 0}
     };
 
@@ -1236,6 +1301,15 @@
                 return 0;
             } else if (strcmp("slot", longopts[longindex].name) == 0) {
                 slot_override = std::string(optarg);
+#if !defined(_WIN32)
+            } else if (strcmp("wipe-and-use-fbe", longopts[longindex].name) == 0) {
+                wants_wipe = true;
+                set_fbe_marker = true;
+#endif
+            } else {
+                fprintf(stderr, "Internal error in options processing for %s\n",
+                    longopts[longindex].name);
+                return 1;
             }
             break;
         default:
@@ -1329,7 +1403,8 @@
                 if (erase_first && needs_erase(transport, partition.c_str())) {
                     fb_queue_erase(partition.c_str());
                 }
-                fb_perform_format(transport, partition.c_str(), 0, type_override, size_override);
+                fb_perform_format(transport, partition.c_str(), 0,
+                    type_override, size_override, "");
             };
             do_for_partitions(transport, argv[1], slot_override.c_str(), format, true);
             skip(2);
@@ -1464,13 +1539,23 @@
     if (wants_wipe) {
         fprintf(stderr, "wiping userdata...\n");
         fb_queue_erase("userdata");
-        fb_perform_format(transport, "userdata", 1, nullptr, nullptr);
+        if (set_fbe_marker) {
+            fprintf(stderr, "setting FBE marker...\n");
+            std::string initial_userdata_dir = create_fbemarker_tmpdir();
+            if (initial_userdata_dir.empty()) {
+                return 1;
+            }
+            fb_perform_format(transport, "userdata", 1, nullptr, nullptr, initial_userdata_dir);
+            delete_fbemarker_tmpdir(initial_userdata_dir);
+        } else {
+            fb_perform_format(transport, "userdata", 1, nullptr, nullptr, "");
+        }
 
         std::string cache_type;
         if (fb_getvar(transport, "partition-type:cache", &cache_type) && !cache_type.empty()) {
             fprintf(stderr, "wiping cache...\n");
             fb_queue_erase("cache");
-            fb_perform_format(transport, "cache", 1, nullptr, nullptr);
+            fb_perform_format(transport, "cache", 1, nullptr, nullptr, "");
         }
     }
     if (wants_set_active) {
diff --git a/fastboot/fs.cpp b/fastboot/fs.cpp
index 90d8474..8539e23 100644
--- a/fastboot/fs.cpp
+++ b/fastboot/fs.cpp
@@ -1,7 +1,8 @@
+#include "fs.h"
+
 #include "fastboot.h"
 #include "make_ext4fs.h"
 #include "make_f2fs.h"
-#include "fs.h"
 
 #include <errno.h>
 #include <stdio.h>
@@ -13,24 +14,32 @@
 
 #include <sparse/sparse.h>
 
-static int generate_ext4_image(int fd, long long partSize)
+static int generate_ext4_image(int fd, long long partSize, const std::string& initial_dir)
 {
-    make_ext4fs_sparse_fd(fd, partSize, NULL, NULL);
-
+    if (initial_dir.empty()) {
+        make_ext4fs_sparse_fd(fd, partSize, NULL, NULL);
+    } else {
+        make_ext4fs_sparse_fd_directory(fd, partSize, NULL, NULL, initial_dir.c_str());
+    }
     return 0;
 }
 
 #ifdef USE_F2FS
-static int generate_f2fs_image(int fd, long long partSize)
+static int generate_f2fs_image(int fd, long long partSize, const std::string& initial_dir)
 {
+    if (!initial_dir.empty()) {
+        fprintf(stderr, "Unable to set initial directory on F2FS filesystem\n");
+        return -1;
+    }
     return make_f2fs_sparse_fd(fd, partSize, NULL, NULL);
 }
 #endif
 
 static const struct fs_generator {
-
     const char* fs_type;  //must match what fastboot reports for partition type
-    int (*generate)(int fd, long long partSize); //returns 0 or error value
+
+    //returns 0 or error value
+    int (*generate)(int fd, long long partSize, const std::string& initial_dir);
 
 } generators[] = {
     { "ext4", generate_ext4_image},
@@ -48,7 +57,8 @@
     return nullptr;
 }
 
-int fs_generator_generate(const struct fs_generator* gen, int tmpFileNo, long long partSize)
+int fs_generator_generate(const struct fs_generator* gen, int tmpFileNo, long long partSize,
+    const std::string& initial_dir)
 {
-    return gen->generate(tmpFileNo, partSize);
+    return gen->generate(tmpFileNo, partSize, initial_dir);
 }
diff --git a/fastboot/fs.h b/fastboot/fs.h
index 289488b..0a68507 100644
--- a/fastboot/fs.h
+++ b/fastboot/fs.h
@@ -1,11 +1,13 @@
 #ifndef _FS_H_
 #define _FS_H_
 
+#include <string>
 #include <stdint.h>
 
 struct fs_generator;
 
 const struct fs_generator* fs_get_generator(const std::string& fs_type);
-int fs_generator_generate(const struct fs_generator* gen, int tmpFileNo, long long partSize);
+int fs_generator_generate(const struct fs_generator* gen, int tmpFileNo, long long partSize,
+    const std::string& initial_dir);
 
 #endif
diff --git a/fingerprintd/FingerprintDaemonProxy.cpp b/fingerprintd/FingerprintDaemonProxy.cpp
index beb95de..1c7da30 100644
--- a/fingerprintd/FingerprintDaemonProxy.cpp
+++ b/fingerprintd/FingerprintDaemonProxy.cpp
@@ -88,6 +88,16 @@
                     msg->data.removed.finger.fid,
                     msg->data.removed.finger.gid);
             break;
+        case FINGERPRINT_TEMPLATE_ENUMERATING:
+            ALOGD("onEnumerate(fid=%d, gid=%d, rem=%d)",
+                    msg->data.enumerated.finger.fid,
+                    msg->data.enumerated.finger.gid,
+                    msg->data.enumerated.remaining_templates);
+            callback->onEnumerate(device,
+                    msg->data.enumerated.finger.fid,
+                    msg->data.enumerated.finger.gid,
+                    msg->data.enumerated.remaining_templates);
+            break;
         default:
             ALOGE("invalid msg type: %d", msg->type);
             return;
@@ -158,6 +168,11 @@
     return mDevice->remove(mDevice, groupId, fingerId);
 }
 
+int32_t FingerprintDaemonProxy::enumerate() {
+    ALOG(LOG_VERBOSE, LOG_TAG, "enumerate()\n");
+    return mDevice->enumerate(mDevice);
+}
+
 uint64_t FingerprintDaemonProxy::getAuthenticatorId() {
     return mDevice->get_authenticator_id(mDevice);
 }
diff --git a/fingerprintd/FingerprintDaemonProxy.h b/fingerprintd/FingerprintDaemonProxy.h
index 871c0e6..145b4c9 100644
--- a/fingerprintd/FingerprintDaemonProxy.h
+++ b/fingerprintd/FingerprintDaemonProxy.h
@@ -40,6 +40,7 @@
         virtual int32_t authenticate(uint64_t sessionId, uint32_t groupId);
         virtual int32_t stopAuthentication();
         virtual int32_t remove(int32_t fingerId, int32_t groupId);
+        virtual int32_t enumerate();
         virtual uint64_t getAuthenticatorId();
         virtual int32_t setActiveGroup(int32_t groupId, const uint8_t* path, ssize_t pathLen);
         virtual int64_t openHal();
diff --git a/fingerprintd/IFingerprintDaemon.cpp b/fingerprintd/IFingerprintDaemon.cpp
index 7131793..bc4af56 100644
--- a/fingerprintd/IFingerprintDaemon.cpp
+++ b/fingerprintd/IFingerprintDaemon.cpp
@@ -125,6 +125,16 @@
             reply->writeInt32(ret);
             return NO_ERROR;
         }
+        case ENUMERATE: {
+            CHECK_INTERFACE(IFingerprintDaemon, data, reply);
+            if (!checkPermission(HAL_FINGERPRINT_PERMISSION)) {
+                return PERMISSION_DENIED;
+            }
+            const int32_t ret = enumerate();
+            reply->writeNoException();
+            reply->writeInt32(ret);
+            return NO_ERROR;
+        }
         case GET_AUTHENTICATOR_ID: {
             CHECK_INTERFACE(IFingerprintDaemon, data, reply);
             if (!checkPermission(HAL_FINGERPRINT_PERMISSION)) {
diff --git a/fingerprintd/IFingerprintDaemon.h b/fingerprintd/IFingerprintDaemon.h
index 1eb4ac1..23c36ff 100644
--- a/fingerprintd/IFingerprintDaemon.h
+++ b/fingerprintd/IFingerprintDaemon.h
@@ -44,6 +44,7 @@
            CLOSE_HAL = IBinder::FIRST_CALL_TRANSACTION + 9,
            INIT = IBinder::FIRST_CALL_TRANSACTION + 10,
            POST_ENROLL = IBinder::FIRST_CALL_TRANSACTION + 11,
+           ENUMERATE = IBinder::FIRST_CALL_TRANSACTION + 12,
         };
 
         IFingerprintDaemon() { }
@@ -60,6 +61,7 @@
         virtual int32_t authenticate(uint64_t sessionId, uint32_t groupId) = 0;
         virtual int32_t stopAuthentication() = 0;
         virtual int32_t remove(int32_t fingerId, int32_t groupId) = 0;
+        virtual int32_t enumerate() = 0;
         virtual uint64_t getAuthenticatorId() = 0;
         virtual int32_t setActiveGroup(int32_t groupId, const uint8_t* path, ssize_t pathLen) = 0;
         virtual int64_t openHal() = 0;
diff --git a/fingerprintd/IFingerprintDaemonCallback.cpp b/fingerprintd/IFingerprintDaemonCallback.cpp
index 44d8020..19838c9 100644
--- a/fingerprintd/IFingerprintDaemonCallback.cpp
+++ b/fingerprintd/IFingerprintDaemonCallback.cpp
@@ -74,13 +74,13 @@
         return remote()->transact(ON_REMOVED, data, &reply, IBinder::FLAG_ONEWAY);
     }
 
-    virtual status_t onEnumerate(int64_t devId, const int32_t* fpIds, const int32_t* gpIds,
-            int32_t sz) {
+    virtual status_t onEnumerate(int64_t devId, int32_t fpId, int32_t gpId, int32_t rem) {
         Parcel data, reply;
         data.writeInterfaceToken(IFingerprintDaemonCallback::getInterfaceDescriptor());
         data.writeInt64(devId);
-        data.writeInt32Array(sz, fpIds);
-        data.writeInt32Array(sz, gpIds);
+        data.writeInt32(fpId);
+        data.writeInt32(gpId);
+        data.writeInt32(rem);
         return remote()->transact(ON_ENUMERATE, data, &reply, IBinder::FLAG_ONEWAY);
     }
 };
diff --git a/fingerprintd/IFingerprintDaemonCallback.h b/fingerprintd/IFingerprintDaemonCallback.h
index 6e32213..e343cb4 100644
--- a/fingerprintd/IFingerprintDaemonCallback.h
+++ b/fingerprintd/IFingerprintDaemonCallback.h
@@ -44,8 +44,7 @@
         virtual status_t onAuthenticated(int64_t devId, int32_t fingerId, int32_t groupId) = 0;
         virtual status_t onError(int64_t devId, int32_t error) = 0;
         virtual status_t onRemoved(int64_t devId, int32_t fingerId, int32_t groupId) = 0;
-        virtual status_t onEnumerate(int64_t devId, const int32_t* fpIds, const int32_t* gpIds,
-                int32_t sz) = 0;
+        virtual status_t onEnumerate(int64_t devId, int32_t fingerId, int32_t groupId, int32_t rem) = 0;
 
         DECLARE_META_INTERFACE(FingerprintDaemonCallback);
 };
diff --git a/fs_mgr/fs_mgr.c b/fs_mgr/fs_mgr.c
index c47a585..2ff6273 100644
--- a/fs_mgr/fs_mgr.c
+++ b/fs_mgr/fs_mgr.c
@@ -101,6 +101,7 @@
     char tmpmnt_opts[64] = "errors=remount-ro";
     char *e2fsck_argv[] = {
         E2FSCK_BIN,
+        "-f",
         "-y",
         blk_device
     };
@@ -442,8 +443,22 @@
 // Check to see if a mountable volume has encryption requirements
 static int handle_encryptable(struct fstab *fstab, const struct fstab_rec* rec)
 {
+    /* Check for existence of convert_fbe breadcrumb file */
+    char convert_fbe_name[PATH_MAX];
+    snprintf(convert_fbe_name, sizeof(convert_fbe_name),
+             "%s/convert_fbe", rec->mount_point);
+    bool convert_fbe = (access(convert_fbe_name, F_OK) == 0);
+
+    /* Check for existence of convert_fbe breadcrumb file */
+    char convert_fde_name[PATH_MAX];
+    snprintf(convert_fde_name, sizeof(convert_fbe_name),
+             "%s/misc/vold/convert_fde", rec->mount_point);
+    bool convert_fde = (access(convert_fde_name, F_OK) == 0);
+
     /* If this is block encryptable, need to trigger encryption */
     if (   (rec->fs_mgr_flags & MF_FORCECRYPT)
+        || ((rec->fs_mgr_flags & MF_CRYPT) && convert_fde)
+        || ((rec->fs_mgr_flags & MF_FORCEFDEORFBE) && !convert_fbe)
         || (device_is_force_encrypted() && fs_mgr_is_encryptable(rec))) {
         if (umount(rec->mount_point) == 0) {
             return FS_MGR_MNTALL_DEV_NEEDS_ENCRYPTION;
@@ -455,7 +470,8 @@
     }
 
     // Deal with file level encryption
-    if (rec->fs_mgr_flags & MF_FILEENCRYPTION) {
+    if (   (rec->fs_mgr_flags & MF_FILEENCRYPTION)
+        || ((rec->fs_mgr_flags & MF_FORCEFDEORFBE) && convert_fbe)) {
         // Default or not yet initialized encryption requires no more work here
         if (!e4crypt_non_default_key(rec->mount_point)) {
             INFO("%s is default file encrypted\n", rec->mount_point);
@@ -881,7 +897,8 @@
         if (fstab->recs[i].fs_mgr_flags & MF_VOLDMANAGED) {
             continue;
         }
-        if (!(fstab->recs[i].fs_mgr_flags & (MF_CRYPT | MF_FORCECRYPT))) {
+        if (!(fstab->recs[i].fs_mgr_flags
+              & (MF_CRYPT | MF_FORCECRYPT | MF_FORCEFDEORFBE))) {
             continue;
         }
 
diff --git a/fs_mgr/fs_mgr_fstab.c b/fs_mgr/fs_mgr_fstab.c
index cf35b3f..c8c624d 100644
--- a/fs_mgr/fs_mgr_fstab.c
+++ b/fs_mgr/fs_mgr_fstab.c
@@ -64,6 +64,7 @@
     { "encryptable=",MF_CRYPT },
     { "forceencrypt=",MF_FORCECRYPT },
     { "fileencryption",MF_FILEENCRYPTION },
+    { "forcefdeorfbe=",MF_FORCEFDEORFBE },
     { "nonremovable",MF_NONREMOVABLE },
     { "voldmanaged=",MF_VOLDMANAGED},
     { "length=",     MF_LENGTH },
@@ -140,6 +141,11 @@
                      * location of the keys.  Get it and return it.
                      */
                     flag_vals->key_loc = strdup(strchr(p, '=') + 1);
+                } else if ((fl[i].flag == MF_FORCEFDEORFBE) && flag_vals) {
+                    /* The forcefdeorfbe flag is followed by an = and the
+                     * location of the keys.  Get it and return it.
+                     */
+                    flag_vals->key_loc = strdup(strchr(p, '=') + 1);
                 } else if ((fl[i].flag == MF_LENGTH) && flag_vals) {
                     /* The length flag is followed by an = and the
                      * size of the partition.  Get it and return it.
@@ -464,7 +470,7 @@
 
 int fs_mgr_is_encryptable(const struct fstab_rec *fstab)
 {
-    return fstab->fs_mgr_flags & (MF_CRYPT | MF_FORCECRYPT);
+    return fstab->fs_mgr_flags & (MF_CRYPT | MF_FORCECRYPT | MF_FORCEFDEORFBE);
 }
 
 int fs_mgr_is_file_encrypted(const struct fstab_rec *fstab)
@@ -472,6 +478,11 @@
     return fstab->fs_mgr_flags & MF_FILEENCRYPTION;
 }
 
+int fs_mgr_is_convertible_to_fbe(const struct fstab_rec *fstab)
+{
+    return fstab->fs_mgr_flags & MF_FORCEFDEORFBE;
+}
+
 int fs_mgr_is_noemulatedsd(const struct fstab_rec *fstab)
 {
     return fstab->fs_mgr_flags & MF_NOEMULATEDSD;
diff --git a/fs_mgr/fs_mgr_priv.h b/fs_mgr/fs_mgr_priv.h
index ba0e097..181b6cd 100644
--- a/fs_mgr/fs_mgr_priv.h
+++ b/fs_mgr/fs_mgr_priv.h
@@ -82,6 +82,7 @@
 #define MF_FILEENCRYPTION 0x2000
 #define MF_FORMATTABLE  0x4000
 #define MF_SLOTSELECT   0x8000
+#define MF_FORCEFDEORFBE 0x10000
 
 #define DM_BUF_SIZE 4096
 
diff --git a/fs_mgr/include/fs_mgr.h b/fs_mgr/include/fs_mgr.h
index 27fccf7..eb0a7fc 100644
--- a/fs_mgr/include/fs_mgr.h
+++ b/fs_mgr/include/fs_mgr.h
@@ -102,6 +102,7 @@
 int fs_mgr_is_verified(const struct fstab_rec *fstab);
 int fs_mgr_is_encryptable(const struct fstab_rec *fstab);
 int fs_mgr_is_file_encrypted(const struct fstab_rec *fstab);
+int fs_mgr_is_convertible_to_fbe(const struct fstab_rec *fstab);
 int fs_mgr_is_noemulatedsd(const struct fstab_rec *fstab);
 int fs_mgr_is_notrim(struct fstab_rec *fstab);
 int fs_mgr_is_formattable(struct fstab_rec *fstab);
diff --git a/gatekeeperd/tests/gatekeeper_test.cpp b/gatekeeperd/tests/gatekeeper_test.cpp
index c504f92..47a8bfa 100644
--- a/gatekeeperd/tests/gatekeeper_test.cpp
+++ b/gatekeeperd/tests/gatekeeper_test.cpp
@@ -18,9 +18,8 @@
 #include <iostream>
 
 #include <gtest/gtest.h>
-#include <UniquePtr.h>
-
 #include <hardware/hw_auth_token.h>
+#include <UniquePtr.h>
 
 #include "../SoftGateKeeper.h"
 
diff --git a/healthd/BatteryMonitor.cpp b/healthd/BatteryMonitor.cpp
index cdfe9c5..3b5ff35 100644
--- a/healthd/BatteryMonitor.cpp
+++ b/healthd/BatteryMonitor.cpp
@@ -611,7 +611,7 @@
             KLOG_WARNING(LOG_TAG, "BatteryTemperaturePath not found\n");
         if (mHealthdConfig->batteryTechnologyPath.isEmpty())
             KLOG_WARNING(LOG_TAG, "BatteryTechnologyPath not found\n");
-	if (mHealthdConfig->batteryCurrentNowPath.isEmpty())
+        if (mHealthdConfig->batteryCurrentNowPath.isEmpty())
             KLOG_WARNING(LOG_TAG, "BatteryCurrentNowPath not found\n");
         if (mHealthdConfig->batteryFullChargePath.isEmpty())
             KLOG_WARNING(LOG_TAG, "BatteryFullChargePath not found\n");
diff --git a/include/cutils/fs.h b/include/cutils/fs.h
index 70f0b92..be9e819 100644
--- a/include/cutils/fs.h
+++ b/include/cutils/fs.h
@@ -40,11 +40,18 @@
 #endif
 
 /*
- * Ensure that directory exists with given mode and owners.
+ * Ensure that directory exists with given mode and owners.  If it exists
+ * with a different mode or owners, they are fixed to match the given values.
  */
 extern int fs_prepare_dir(const char* path, mode_t mode, uid_t uid, gid_t gid);
 
 /*
+ * Ensure that directory exists with given mode and owners.  If it exists
+ * with different owners, they are not fixed and -1 is returned.
+ */
+extern int fs_prepare_dir_strict(const char* path, mode_t mode, uid_t uid, gid_t gid);
+
+/*
  * Read single plaintext integer from given file, correctly handling files
  * partially written with fs_write_atomic_int().
  */
diff --git a/include/system/radio.h b/include/system/radio.h
index a088526..9e291c8 100644
--- a/include/system/radio.h
+++ b/include/system/radio.h
@@ -94,6 +94,7 @@
     radio_rds_t         rds;        /* RDS variants supported */
     bool                ta;         /* Traffic Announcement supported */
     bool                af;         /* Alternate Frequency supported */
+    bool                ea;         /* Emergency announcements supported */
 } radio_hal_fm_band_config_t;
 
 /* Additional attributes for an AM band configuration */
@@ -184,6 +185,7 @@
     RADIO_EVENT_METADATA    = 4,  /* New meta data received */
     RADIO_EVENT_TA          = 5,  /* Traffic announcement start or stop */
     RADIO_EVENT_AF_SWITCH   = 6,  /* Switch to Alternate Frequency */
+    RADIO_EVENT_EA          = 7,  /* Emergency announcement start or stop */
     // begin framework only events
     RADIO_EVENT_CONTROL     = 100, /* loss/gain of tuner control */
     RADIO_EVENT_SERVER_DIED = 101, /* radio service died */
@@ -195,7 +197,8 @@
     radio_event_type_t  type;       /* event type */
     int                 status;     /* used by RADIO_EVENT_CONFIG, RADIO_EVENT_TUNED */
     union {
-        bool                    on;     /* RADIO_EVENT_ANTENNA, RADIO_EVENT_TA */
+        /* RADIO_EVENT_ANTENNA, RADIO_EVENT_TA, RADIO_EVENT_EA */
+        bool                    on;
         radio_hal_band_config_t config; /* RADIO_EVENT_CONFIG */
         radio_program_info_t    info;   /* RADIO_EVENT_TUNED, RADIO_EVENT_AF_SWITCH */
         radio_metadata_t        *metadata; /* RADIO_EVENT_METADATA */
diff --git a/include/system/window.h b/include/system/window.h
index 508ce00..14cce27 100644
--- a/include/system/window.h
+++ b/include/system/window.h
@@ -25,6 +25,7 @@
 #include <sys/cdefs.h>
 #include <system/graphics.h>
 #include <unistd.h>
+#include <stdbool.h>
 
 #ifndef __UNUSED
 #define __UNUSED __attribute__((__unused__))
@@ -311,6 +312,7 @@
     NATIVE_WINDOW_SET_SIDEBAND_STREAM       = 18,
     NATIVE_WINDOW_SET_BUFFERS_DATASPACE     = 19,
     NATIVE_WINDOW_SET_SURFACE_DAMAGE        = 20,   /* private */
+    NATIVE_WINDOW_SET_SINGLE_BUFFER_MODE    = 21,
 };
 
 /* parameter for NATIVE_WINDOW_[API_][DIS]CONNECT */
@@ -351,7 +353,8 @@
     NATIVE_WINDOW_TRANSFORM_INVERSE_DISPLAY = 0x08
 };
 
-/* parameter for NATIVE_WINDOW_SET_SCALING_MODE */
+/* parameter for NATIVE_WINDOW_SET_SCALING_MODE
+ * keep in sync with Surface.java in frameworks/base */
 enum {
     /* the window content is not updated (frozen) until a buffer of
      * the window size is received (enqueued)
@@ -949,6 +952,18 @@
             rects, numRects);
 }
 
+/*
+ * native_window_set_single_buffer_mode(..., bool singleBufferMode)
+ * Enable/disable single buffer mode
+ */
+static inline int native_window_set_single_buffer_mode(
+        struct ANativeWindow* window,
+        bool singleBufferMode)
+{
+    return window->perform(window, NATIVE_WINDOW_SET_SINGLE_BUFFER_MODE,
+            singleBufferMode);
+}
+
 __END_DECLS
 
 #endif /* SYSTEM_CORE_INCLUDE_ANDROID_WINDOW_H */
diff --git a/include/usbhost/usbhost.h b/include/usbhost/usbhost.h
index 4350ec1..88b5b44 100644
--- a/include/usbhost/usbhost.h
+++ b/include/usbhost/usbhost.h
@@ -219,6 +219,9 @@
                             int length,
                             unsigned int timeout);
 
+/** Reset USB bus for the device */
+int usb_device_reset(struct usb_device *device);
+
 /* Creates a new usb_request. */
 struct usb_request *usb_request_new(struct usb_device *dev,
         const struct usb_endpoint_descriptor *ep_desc);
diff --git a/init/builtins.cpp b/init/builtins.cpp
index d2291bb..7191789 100644
--- a/init/builtins.cpp
+++ b/init/builtins.cpp
@@ -878,6 +878,15 @@
     return e4crypt_set_user_crypto_policies(args[1].c_str());
 }
 
+static int do_createuserkey(const std::vector<std::string>& args) {
+    if (!is_file_crypto()) {
+        return 0;
+    }
+    return e4crypt_create_user_key(atoi(args[1].c_str()),
+                                   atoi(args[2].c_str()),
+                                   atoi(args[3].c_str()));
+}
+
 BuiltinFunctionMap::Map& BuiltinFunctionMap::map() const {
     constexpr std::size_t kMax = std::numeric_limits<std::size_t>::max();
     static const Map builtin_functions = {
@@ -888,6 +897,7 @@
         {"class_start",             {1,     1,    do_class_start}},
         {"class_stop",              {1,     1,    do_class_stop}},
         {"copy",                    {2,     2,    do_copy}},
+        {"createuserkey",           {3,     3,    do_createuserkey}},
         {"domainname",              {1,     1,    do_domainname}},
         {"enable",                  {1,     1,    do_enable}},
         {"exec",                    {1,     kMax, do_exec}},
diff --git a/libcutils/fs.c b/libcutils/fs.c
index 45c7add..5e2ef0b 100644
--- a/libcutils/fs.c
+++ b/libcutils/fs.c
@@ -37,7 +37,8 @@
 #define ALL_PERMS (S_ISUID | S_ISGID | S_ISVTX | S_IRWXU | S_IRWXG | S_IRWXO)
 #define BUF_SIZE 64
 
-int fs_prepare_dir(const char* path, mode_t mode, uid_t uid, gid_t gid) {
+static int fs_prepare_dir_impl(const char* path, mode_t mode, uid_t uid, gid_t gid,
+        int allow_fixup) {
     // Check if path needs to be created
     struct stat sb;
     if (TEMP_FAILURE_RETRY(lstat(path, &sb)) == -1) {
@@ -54,10 +55,22 @@
         ALOGE("Not a directory: %s", path);
         return -1;
     }
-    if (((sb.st_mode & ALL_PERMS) == mode) && (sb.st_uid == uid) && (sb.st_gid == gid)) {
+    int owner_match = ((sb.st_uid == uid) && (sb.st_gid == gid));
+    int mode_match = ((sb.st_mode & ALL_PERMS) == mode);
+    if (owner_match && mode_match) {
         return 0;
-    } else {
+    } else if (allow_fixup) {
         goto fixup;
+    } else {
+        if (!owner_match) {
+            ALOGE("Expected path %s with owner %d:%d but found %d:%d",
+                    path, uid, gid, sb.st_uid, sb.st_gid);
+            return -1;
+        } else {
+            ALOGW("Expected path %s with mode %o but found %o",
+                    path, mode, (sb.st_mode & ALL_PERMS));
+            return 0;
+        }
     }
 
 create:
@@ -81,6 +94,14 @@
     return 0;
 }
 
+int fs_prepare_dir(const char* path, mode_t mode, uid_t uid, gid_t gid) {
+    return fs_prepare_dir_impl(path, mode, uid, gid, 1);
+}
+
+int fs_prepare_dir_strict(const char* path, mode_t mode, uid_t uid, gid_t gid) {
+    return fs_prepare_dir_impl(path, mode, uid, gid, 0);
+}
+
 int fs_read_atomic_int(const char* path, int* out_value) {
     int fd = TEMP_FAILURE_RETRY(open(path, O_RDONLY));
     if (fd == -1) {
diff --git a/libcutils/fs_config.c b/libcutils/fs_config.c
index 6d50adc..645edd1 100644
--- a/libcutils/fs_config.c
+++ b/libcutils/fs_config.c
@@ -79,6 +79,7 @@
     { 00500, AID_ROOT,   AID_ROOT,   0, "config" },
     { 00771, AID_SYSTEM, AID_SYSTEM, 0, "data/app" },
     { 00771, AID_SYSTEM, AID_SYSTEM, 0, "data/app-private" },
+    { 00771, AID_SYSTEM, AID_SYSTEM, 0, "data/app-ephemeral" },
     { 00771, AID_ROOT,   AID_ROOT,   0, "data/dalvik-cache" },
     { 00771, AID_SYSTEM, AID_SYSTEM, 0, "data/data" },
     { 00771, AID_SHELL,  AID_SHELL,  0, "data/local/tmp" },
@@ -126,6 +127,7 @@
     { 00644, AID_SYSTEM,    AID_SYSTEM,    0, "data/app/*" },
     { 00644, AID_MEDIA_RW,  AID_MEDIA_RW,  0, "data/media/*" },
     { 00644, AID_SYSTEM,    AID_SYSTEM,    0, "data/app-private/*" },
+    { 00644, AID_SYSTEM,    AID_SYSTEM,    0, "data/app-ephemeral/*" },
     { 00644, AID_APP,       AID_APP,       0, "data/data/*" },
     { 00640, AID_ROOT,      AID_SHELL,     0, "data/nativetest/tests.txt" },
     { 00640, AID_ROOT,      AID_SHELL,     0, "data/nativetest64/tests.txt" },
diff --git a/libnativeloader/native_loader.cpp b/libnativeloader/native_loader.cpp
index 6e6b0b9..2e2ef36 100644
--- a/libnativeloader/native_loader.cpp
+++ b/libnativeloader/native_loader.cpp
@@ -36,6 +36,10 @@
 #ifdef __ANDROID__
 // TODO(dimitry): move this to system properties.
 static const char* kPublicNativeLibraries = "libandroid.so:"
+                                            // TODO (dimitry): This is a workaround for http://b/26436837
+                                            // will be removed before the release.
+                                            "libart.so:"
+                                            // END OF WORKAROUND
                                             "libc.so:"
                                             "libdl.so:"
                                             "libEGL.so:"
diff --git a/libnetutils/dhcptool.c b/libnetutils/dhcptool.c
index 352ac5e..a2d3869 100644
--- a/libnetutils/dhcptool.c
+++ b/libnetutils/dhcptool.c
@@ -14,6 +14,7 @@
  * limitations under the License.
  */
 
+#include <err.h>
 #include <errno.h>
 #include <error.h>
 #include <stdbool.h>
@@ -29,12 +30,14 @@
 
   char* interface = argv[1];
   if (ifc_init()) {
-    error(EXIT_FAILURE, errno, "dhcptool %s: ifc_init failed", interface);
+    err(errno, "dhcptool %s: ifc_init failed", interface);
+    ifc_close();
+    return EXIT_FAILURE;
   }
 
   int rc = do_dhcp(interface);
   if (rc) {
-    error(0, errno, "dhcptool %s: do_dhcp failed", interface);
+    err(errno, "dhcptool %s: do_dhcp failed", interface);
   }
 
   ifc_close();
diff --git a/libnetutils/ifc_utils.c b/libnetutils/ifc_utils.c
index e0a9f7f..85ff070 100644
--- a/libnetutils/ifc_utils.c
+++ b/libnetutils/ifc_utils.c
@@ -19,6 +19,7 @@
 #include <unistd.h>
 #include <string.h>
 #include <errno.h>
+#include <pthread.h>
 
 #include <sys/socket.h>
 #include <sys/select.h>
@@ -57,6 +58,8 @@
 
 static int ifc_ctl_sock = -1;
 static int ifc_ctl_sock6 = -1;
+static pthread_mutex_t ifc_sock_mutex = PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP;
+static pthread_mutex_t ifc_sock6_mutex = PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP;
 void printerr(char *fmt, ...);
 
 #define DBG 0
@@ -122,6 +125,8 @@
 int ifc_init(void)
 {
     int ret;
+
+    pthread_mutex_lock(&ifc_sock_mutex);
     if (ifc_ctl_sock == -1) {
         ifc_ctl_sock = socket(AF_INET, SOCK_DGRAM | SOCK_CLOEXEC, 0);
         if (ifc_ctl_sock < 0) {
@@ -136,6 +141,7 @@
 
 int ifc_init6(void)
 {
+    pthread_mutex_lock(&ifc_sock6_mutex);
     if (ifc_ctl_sock6 == -1) {
         ifc_ctl_sock6 = socket(AF_INET6, SOCK_DGRAM | SOCK_CLOEXEC, 0);
         if (ifc_ctl_sock6 < 0) {
@@ -152,6 +158,7 @@
         (void)close(ifc_ctl_sock);
         ifc_ctl_sock = -1;
     }
+    pthread_mutex_unlock(&ifc_sock_mutex);
 }
 
 void ifc_close6(void)
@@ -160,6 +167,7 @@
         (void)close(ifc_ctl_sock6);
         ifc_ctl_sock6 = -1;
     }
+    pthread_mutex_unlock(&ifc_sock6_mutex);
 }
 
 static void ifc_init_ifr(const char *name, struct ifreq *ifr)
@@ -541,6 +549,7 @@
     ifc_init();
 
     if (ifc_ctl_sock < 0) {
+        ifc_close();
         return -errno;
     }
 
diff --git a/libusbhost/usbhost.c b/libusbhost/usbhost.c
index b8e3215..299fdc4 100644
--- a/libusbhost/usbhost.c
+++ b/libusbhost/usbhost.c
@@ -617,6 +617,11 @@
     return ioctl(device->fd, USBDEVFS_BULK, &ctrl);
 }
 
+int usb_device_reset(struct usb_device *device)
+{
+    return ioctl(device->fd, USBDEVFS_RESET);
+}
+
 struct usb_request *usb_request_new(struct usb_device *dev,
         const struct usb_endpoint_descriptor *ep_desc)
 {
diff --git a/libutils/Android.mk b/libutils/Android.mk
index 631b5a3..8c4fd15 100644
--- a/libutils/Android.mk
+++ b/libutils/Android.mk
@@ -106,19 +106,16 @@
 LOCAL_SANITIZE := integer
 include $(BUILD_SHARED_LIBRARY)
 
-# Include subdirectory makefiles
-# ============================================================
-
 include $(CLEAR_VARS)
 LOCAL_MODULE := SharedBufferTest
-LOCAL_STATIC_LIBRARIES := libutils libcutils
+LOCAL_STATIC_LIBRARIES := libutils
 LOCAL_SHARED_LIBRARIES := liblog
 LOCAL_SRC_FILES := SharedBufferTest.cpp
 include $(BUILD_NATIVE_TEST)
 
 include $(CLEAR_VARS)
 LOCAL_MODULE := SharedBufferTest
-LOCAL_STATIC_LIBRARIES := libutils libcutils
+LOCAL_STATIC_LIBRARIES := libutils
 LOCAL_SHARED_LIBRARIES := liblog
 LOCAL_SRC_FILES := SharedBufferTest.cpp
 include $(BUILD_HOST_NATIVE_TEST)
diff --git a/libutils/SharedBuffer.cpp b/libutils/SharedBuffer.cpp
index c7dd1ab..34d75ee 100644
--- a/libutils/SharedBuffer.cpp
+++ b/libutils/SharedBuffer.cpp
@@ -14,8 +14,6 @@
  * limitations under the License.
  */
 
-#define __STDC_LIMIT_MACROS
-#include <stdint.h>
 #include <stdlib.h>
 #include <string.h>
 
diff --git a/libutils/SharedBufferTest.cpp b/libutils/SharedBufferTest.cpp
index a0484ff..33a4e0c 100644
--- a/libutils/SharedBufferTest.cpp
+++ b/libutils/SharedBufferTest.cpp
@@ -31,10 +31,10 @@
   // Check that null is returned, as we are asking for the whole address space.
   android::SharedBuffer* buf =
       android::SharedBuffer::alloc(SIZE_MAX - sizeof(android::SharedBuffer) - 1);
-  ASSERT_TRUE(NULL == buf);
+  ASSERT_EQ(nullptr, buf);
 
   buf = android::SharedBuffer::alloc(0);
-  ASSERT_FALSE(NULL == buf);
+  ASSERT_NE(nullptr, buf);
   ASSERT_EQ(0U, buf->size());
   buf->release();
 }
@@ -49,7 +49,7 @@
   // Make sure we don't die here.
   // Check that null is returned, as we are asking for the whole address space.
   buf = buf->editResize(SIZE_MAX - sizeof(android::SharedBuffer) - 1);
-  ASSERT_TRUE(NULL == buf);
+  ASSERT_EQ(nullptr, buf);
 
   buf = android::SharedBuffer::alloc(10);
   buf = buf->editResize(0);
diff --git a/libutils/tests/String8_test.cpp b/libutils/tests/String8_test.cpp
index c42c68d..01e64f6 100644
--- a/libutils/tests/String8_test.cpp
+++ b/libutils/tests/String8_test.cpp
@@ -72,4 +72,9 @@
     EXPECT_STREQ(src3, " Verify me.");
 }
 
+TEST_F(String8Test, SetToSizeMaxReturnsNoMemory) {
+    const char *in = "some string";
+    EXPECT_EQ(NO_MEMORY, String8("").setTo(in, SIZE_MAX));
+}
+
 }
diff --git a/lmkd/lmkd.c b/lmkd/lmkd.c
index aa3db8a..511bf68 100644
--- a/lmkd/lmkd.c
+++ b/lmkd/lmkd.c
@@ -77,12 +77,7 @@
 static int epollfd;
 static int maxevents;
 
-#define OOM_DISABLE (-17)
-/* inclusive */
-#define OOM_ADJUST_MIN (-16)
-#define OOM_ADJUST_MAX 15
-
-/* kernel OOM score values */
+/* OOM score values used by both kernel and framework */
 #define OOM_SCORE_ADJ_MIN       (-1000)
 #define OOM_SCORE_ADJ_MAX       1000
 
@@ -114,8 +109,8 @@
 static struct proc *pidhash[PIDHASH_SZ];
 #define pid_hashfn(x) ((((x) >> 8) ^ (x)) & (PIDHASH_SZ - 1))
 
-#define ADJTOSLOT(adj) (adj + -OOM_ADJUST_MIN)
-static struct adjslot_list procadjslot_list[ADJTOSLOT(OOM_ADJUST_MAX) + 1];
+#define ADJTOSLOT(adj) (adj + -OOM_SCORE_ADJ_MIN)
+static struct adjslot_list procadjslot_list[ADJTOSLOT(OOM_SCORE_ADJ_MAX) + 1];
 
 /*
  * Wait 1-2 seconds for the death report of a killed process prior to
@@ -148,14 +143,6 @@
     return ret;
 }
 
-static int lowmem_oom_adj_to_oom_score_adj(int oom_adj)
-{
-    if (oom_adj == OOM_ADJUST_MAX)
-        return OOM_SCORE_ADJ_MAX;
-    else
-        return (oom_adj * OOM_SCORE_ADJ_MAX) / -OOM_DISABLE;
-}
-
 static struct proc *pid_lookup(int pid) {
     struct proc *procp;
 
@@ -254,13 +241,13 @@
     char path[80];
     char val[20];
 
-    if (oomadj < OOM_DISABLE || oomadj > OOM_ADJUST_MAX) {
+    if (oomadj < OOM_SCORE_ADJ_MIN || oomadj > OOM_SCORE_ADJ_MAX) {
         ALOGE("Invalid PROCPRIO oomadj argument %d", oomadj);
         return;
     }
 
     snprintf(path, sizeof(path), "/proc/%d/oom_score_adj", pid);
-    snprintf(val, sizeof(val), "%d", lowmem_oom_adj_to_oom_score_adj(oomadj));
+    snprintf(val, sizeof(val), "%d", oomadj);
     writefilestring(path, val);
 
     if (use_inkernel_interface)
@@ -608,7 +595,7 @@
 static int find_and_kill_process(int other_free, int other_file, bool first)
 {
     int i;
-    int min_score_adj = OOM_ADJUST_MAX + 1;
+    int min_score_adj = OOM_SCORE_ADJ_MAX + 1;
     int minfree = 0;
     int killed_size = 0;
 
@@ -620,10 +607,10 @@
         }
     }
 
-    if (min_score_adj == OOM_ADJUST_MAX + 1)
+    if (min_score_adj == OOM_SCORE_ADJ_MAX + 1)
         return 0;
 
-    for (i = OOM_ADJUST_MAX; i >= min_score_adj; i--) {
+    for (i = OOM_SCORE_ADJ_MAX; i >= min_score_adj; i--) {
         struct proc *procp;
 
 retry:
@@ -784,7 +771,7 @@
             ALOGE("Kernel does not support memory pressure events or in-kernel low memory killer");
     }
 
-    for (i = 0; i <= ADJTOSLOT(OOM_ADJUST_MAX); i++) {
+    for (i = 0; i <= ADJTOSLOT(OOM_SCORE_ADJ_MAX); i++) {
         procadjslot_list[i].next = &procadjslot_list[i];
         procadjslot_list[i].prev = &procadjslot_list[i];
     }
diff --git a/rootdir/init.rc b/rootdir/init.rc
index 15928f8..b5a905b 100644
--- a/rootdir/init.rc
+++ b/rootdir/init.rc
@@ -76,6 +76,7 @@
     mkdir /mnt/user 0755 root root
     mkdir /mnt/user/0 0755 root root
     mkdir /mnt/expand 0771 system system
+    mkdir /mnt/appfuse 0711 root root
 
     # Storage views to support runtime permissions
     mkdir /mnt/runtime 0700 root root
@@ -307,8 +308,6 @@
     start vold
     installkey /data
 
-    # Emulated internal storage area
-    mkdir /data/media 0770 media_rw media_rw
     # Start bootcharting as soon as possible after the data partition is
     # mounted to collect more data.
     mkdir /data/bootchart 0755 shell shell
@@ -355,6 +354,7 @@
     mkdir /data/local/tmp 0771 shell shell
     mkdir /data/data 0771 system system
     mkdir /data/app-private 0771 system system
+    mkdir /data/app-ephemeral 0771 system system
     mkdir /data/app-asec 0700 root root
     mkdir /data/app-lib 0771 system system
     mkdir /data/app 0771 system system
@@ -391,13 +391,25 @@
     # Create all remaining /data root dirs so that they are made through init
     # and get proper encryption policy installed
     mkdir /data/backup 0700 system system
-    mkdir /data/media 0770 media_rw media_rw
     mkdir /data/ss 0700 system system
+
     mkdir /data/system 0775 system system
     mkdir /data/system/heapdump 0700 system system
+    mkdir /data/system_ce 0770 system system
+    mkdir /data/system_ce/0 0770 system system
+
     mkdir /data/user 0711 system system
+    mkdir /data/user_de 0711 system system
+    mkdir /data/user_de/0 0771 system system
+
+    mkdir /data/media 0770 media_rw media_rw
+    mkdir /data/media/0 0770 media_rw media_rw
+    mkdir /data/media/obb 0770 media_rw media_rw
+
+    symlink /data/data /data/user/0
 
     setusercryptopolicies /data/user
+    createuserkey 0 0 0
 
     # Reload policy from /data/security if present.
     setprop selinux.reload_policy 1
diff --git a/rootdir/init.zygote32.rc b/rootdir/init.zygote32.rc
index 0ca38b9..53cfcc2 100644
--- a/rootdir/init.zygote32.rc
+++ b/rootdir/init.zygote32.rc
@@ -3,6 +3,7 @@
     socket zygote stream 660 root system
     onrestart write /sys/android_power/request_state wake
     onrestart write /sys/power/state on
+    onrestart restart audioserver
     onrestart restart media
     onrestart restart netd
     writepid /dev/cpuset/foreground/tasks /sys/fs/cgroup/stune/foreground/tasks
diff --git a/rootdir/init.zygote32_64.rc b/rootdir/init.zygote32_64.rc
index 1646c0f..a9a94d7 100644
--- a/rootdir/init.zygote32_64.rc
+++ b/rootdir/init.zygote32_64.rc
@@ -3,6 +3,7 @@
     socket zygote stream 660 root system
     onrestart write /sys/android_power/request_state wake
     onrestart write /sys/power/state on
+    onrestart restart audioserver
     onrestart restart media
     onrestart restart netd
     writepid /dev/cpuset/foreground/tasks /sys/fs/cgroup/stune/foreground/tasks
diff --git a/rootdir/init.zygote64.rc b/rootdir/init.zygote64.rc
index b477c8e..8f47174 100644
--- a/rootdir/init.zygote64.rc
+++ b/rootdir/init.zygote64.rc
@@ -3,6 +3,7 @@
     socket zygote stream 660 root system
     onrestart write /sys/android_power/request_state wake
     onrestart write /sys/power/state on
+    onrestart restart audioserver
     onrestart restart media
     onrestart restart netd
     writepid /dev/cpuset/foreground/tasks /sys/fs/cgroup/stune/foreground/tasks
diff --git a/rootdir/init.zygote64_32.rc b/rootdir/init.zygote64_32.rc
index 633a981..70a9678 100644
--- a/rootdir/init.zygote64_32.rc
+++ b/rootdir/init.zygote64_32.rc
@@ -3,6 +3,7 @@
     socket zygote stream 660 root system
     onrestart write /sys/android_power/request_state wake
     onrestart write /sys/power/state on
+    onrestart restart audioserver
     onrestart restart media
     onrestart restart netd
     writepid /dev/cpuset/foreground/tasks /sys/fs/cgroup/stune/foreground/tasks
diff --git a/sdcard/sdcard.c b/sdcard/sdcard.c
index f862561..45efe36 100644
--- a/sdcard/sdcard.c
+++ b/sdcard/sdcard.c
@@ -1214,13 +1214,7 @@
     }
     out.fh = ptr_to_id(h);
     out.open_flags = 0;
-
-#ifdef FUSE_STACKED_IO
-    out.lower_fd = h->fd;
-#else
     out.padding = 0;
-#endif
-
     fuse_reply(fuse, hdr->unique, &out, sizeof(out));
     return NO_STATUS;
 }
@@ -1384,13 +1378,7 @@
     }
     out.fh = ptr_to_id(h);
     out.open_flags = 0;
-
-#ifdef FUSE_STACKED_IO
-    out.lower_fd = -1;
-#else
     out.padding = 0;
-#endif
-
     fuse_reply(fuse, hdr->unique, &out, sizeof(out));
     return NO_STATUS;
 }
@@ -1472,11 +1460,6 @@
     out.major = FUSE_KERNEL_VERSION;
     out.max_readahead = req->max_readahead;
     out.flags = FUSE_ATOMIC_O_TRUNC | FUSE_BIG_WRITES;
-
-#ifdef FUSE_STACKED_IO
-    out.flags |= FUSE_STACKED_IO;
-#endif
-
     out.max_background = 32;
     out.congestion_threshold = 32;
     out.max_write = MAX_WRITE;
diff --git a/trusty/gatekeeper/Android.mk b/trusty/gatekeeper/Android.mk
new file mode 100644
index 0000000..13e9a09
--- /dev/null
+++ b/trusty/gatekeeper/Android.mk
@@ -0,0 +1,50 @@
+#
+# Copyright (C) 2015 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.
+#
+
+# WARNING: Everything listed here will be built on ALL platforms,
+# including x86, the emulator, and the SDK.  Modules must be uniquely
+# named (liblights.panda), and must build everywhere, or limit themselves
+# to only building on ARM if they include assembly. Individual makefiles
+# are responsible for having their own logic, for fine-grained control.
+
+LOCAL_PATH:= $(call my-dir)
+
+include $(CLEAR_VARS)
+
+LOCAL_MODULE := gatekeeper.trusty
+
+LOCAL_MODULE_RELATIVE_PATH := hw
+
+LOCAL_SRC_FILES := \
+	module.cpp \
+	trusty_gatekeeper_ipc.c \
+	trusty_gatekeeper.cpp
+
+LOCAL_CLFAGS = -fvisibility=hidden -Wall -Werror
+
+LOCAL_SHARED_LIBRARIES := \
+	libgatekeeper \
+	liblog \
+	libcutils \
+	libtrusty
+
+LOCAL_MODULE_TAGS := optional
+
+# Symlink gatekeeper.trusty.so -> gatekeeper.<device>.so so libhardware can find it.
+LOCAL_POST_INSTALL_CMD = \
+    $(hide) ln -sf $(notdir $(LOCAL_INSTALLED_MODULE)) $(dir $(LOCAL_INSTALLED_MODULE))gatekeeper.$(TARGET_DEVICE).so
+
+include $(BUILD_SHARED_LIBRARY)
diff --git a/trusty/gatekeeper/gatekeeper_ipc.h b/trusty/gatekeeper/gatekeeper_ipc.h
new file mode 100644
index 0000000..b05dcd8
--- /dev/null
+++ b/trusty/gatekeeper/gatekeeper_ipc.h
@@ -0,0 +1,40 @@
+/*
+ * Copyright (C) 2015 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
+
+#define GATEKEEPER_PORT "com.android.trusty.gatekeeper"
+#define GATEKEEPER_MAX_BUFFER_LENGTH 1024
+
+enum gatekeeper_command {
+	GK_REQ_SHIFT = 1,
+	GK_RESP_BIT  = 1,
+
+	GK_ENROLL       = (0 << GK_REQ_SHIFT),
+	GK_VERIFY       = (1 << GK_REQ_SHIFT),
+};
+
+/**
+ * gatekeeper_message - Serial header for communicating with GK server
+ * @cmd: the command, one of ENROLL, VERIFY. Payload must be a serialized
+ *       buffer of the corresponding request object.
+ * @payload: start of the serialized command specific payload
+ */
+struct gatekeeper_message {
+    uint32_t cmd;
+    uint8_t payload[0];
+};
+
diff --git a/trusty/gatekeeper/module.cpp b/trusty/gatekeeper/module.cpp
new file mode 100644
index 0000000..0ee3c2f
--- /dev/null
+++ b/trusty/gatekeeper/module.cpp
@@ -0,0 +1,57 @@
+/*
+ * Copyright (C) 2015 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 <hardware/hardware.h>
+
+#include <string.h>
+#include <errno.h>
+#include <stdlib.h>
+
+#include "trusty_gatekeeper.h"
+
+using gatekeeper::TrustyGateKeeperDevice;
+
+static int trusty_gatekeeper_open(const hw_module_t *module, const char *name,
+        hw_device_t **device) {
+
+    if (strcmp(name, HARDWARE_GATEKEEPER) != 0) {
+        return -EINVAL;
+    }
+
+    TrustyGateKeeperDevice *gatekeeper = new TrustyGateKeeperDevice(module);
+    if (gatekeeper == NULL) return -ENOMEM;
+    *device = gatekeeper->hw_device();
+
+    return 0;
+}
+
+static struct hw_module_methods_t gatekeeper_module_methods = {
+    .open = trusty_gatekeeper_open,
+};
+
+struct gatekeeper_module HAL_MODULE_INFO_SYM __attribute__((visibility("default"))) = {
+    .common = {
+        .tag = HARDWARE_MODULE_TAG,
+        .module_api_version = GATEKEEPER_MODULE_API_VERSION_0_1,
+        .hal_api_version = HARDWARE_HAL_API_VERSION,
+        .id = GATEKEEPER_HARDWARE_MODULE_ID,
+        .name = "Trusty GateKeeper HAL",
+        .author = "The Android Open Source Project",
+        .methods = &gatekeeper_module_methods,
+        .dso = 0,
+        .reserved = {}
+    },
+};
diff --git a/trusty/gatekeeper/trusty_gatekeeper.cpp b/trusty/gatekeeper/trusty_gatekeeper.cpp
new file mode 100644
index 0000000..d24f44f
--- /dev/null
+++ b/trusty/gatekeeper/trusty_gatekeeper.cpp
@@ -0,0 +1,230 @@
+/*
+ * Copyright (C) 2015 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 <errno.h>
+#include <stdio.h>
+#include <assert.h>
+#include <type_traits>
+
+#include "trusty_gatekeeper.h"
+#include "trusty_gatekeeper_ipc.h"
+#include "gatekeeper_ipc.h"
+
+#define LOG_TAG "TrustyGateKeeper"
+#include <cutils/log.h>
+
+namespace gatekeeper {
+
+const uint32_t SEND_BUF_SIZE = 8192;
+const uint32_t RECV_BUF_SIZE = 8192;
+
+TrustyGateKeeperDevice::TrustyGateKeeperDevice(const hw_module_t *module) {
+#if __cplusplus >= 201103L || defined(__GXX_EXPERIMENTAL_CXX0X__)
+    static_assert(std::is_standard_layout<TrustyGateKeeperDevice>::value,
+                  "TrustyGateKeeperDevice must be standard layout");
+    static_assert(offsetof(TrustyGateKeeperDevice, device_) == 0,
+                  "device_ must be the first member of TrustyGateKeeperDevice");
+    static_assert(offsetof(TrustyGateKeeperDevice, device_.common) == 0,
+                  "common must be the first member of gatekeeper_device");
+#else
+    assert(reinterpret_cast<gatekeeper_device_t *>(this) == &device_);
+    assert(reinterpret_cast<hw_device_t *>(this) == &(device_.common));
+#endif
+
+    memset(&device_, 0, sizeof(device_));
+    device_.common.tag = HARDWARE_DEVICE_TAG;
+    device_.common.version = 1;
+    device_.common.module = const_cast<hw_module_t *>(module);
+    device_.common.close = close_device;
+
+    device_.enroll = enroll;
+    device_.verify = verify;
+    device_.delete_user = nullptr;
+    device_.delete_all_users = nullptr;
+
+    int rc = trusty_gatekeeper_connect();
+    if (rc < 0) {
+        ALOGE("Error initializing trusty session: %d", rc);
+    }
+
+    error_ = rc;
+
+}
+
+hw_device_t* TrustyGateKeeperDevice::hw_device() {
+    return &device_.common;
+}
+
+int TrustyGateKeeperDevice::close_device(hw_device_t* dev) {
+    delete reinterpret_cast<TrustyGateKeeperDevice *>(dev);
+    return 0;
+}
+
+TrustyGateKeeperDevice::~TrustyGateKeeperDevice() {
+    trusty_gatekeeper_disconnect();
+}
+
+int TrustyGateKeeperDevice::Enroll(uint32_t uid, const uint8_t *current_password_handle,
+        uint32_t current_password_handle_length, const uint8_t *current_password,
+        uint32_t current_password_length, const uint8_t *desired_password,
+        uint32_t desired_password_length, uint8_t **enrolled_password_handle,
+        uint32_t *enrolled_password_handle_length) {
+
+    if (error_ != 0) {
+        return error_;
+    }
+
+    SizedBuffer desired_password_buffer(desired_password_length);
+    memcpy(desired_password_buffer.buffer.get(), desired_password, desired_password_length);
+
+    SizedBuffer current_password_handle_buffer(current_password_handle_length);
+    if (current_password_handle) {
+        memcpy(current_password_handle_buffer.buffer.get(), current_password_handle,
+                current_password_handle_length);
+    }
+
+    SizedBuffer current_password_buffer(current_password_length);
+    if (current_password) {
+        memcpy(current_password_buffer.buffer.get(), current_password, current_password_length);
+    }
+
+    EnrollRequest request(uid, &current_password_handle_buffer, &desired_password_buffer,
+            &current_password_buffer);
+    EnrollResponse response;
+
+    gatekeeper_error_t error = Send(request, &response);
+
+    if (error == ERROR_RETRY) {
+        return response.retry_timeout;
+    } else if (error != ERROR_NONE) {
+        return -EINVAL;
+    }
+
+    *enrolled_password_handle = response.enrolled_password_handle.buffer.release();
+    *enrolled_password_handle_length = response.enrolled_password_handle.length;
+
+
+    return 0;
+}
+
+int TrustyGateKeeperDevice::Verify(uint32_t uid, uint64_t challenge,
+        const uint8_t *enrolled_password_handle, uint32_t enrolled_password_handle_length,
+        const uint8_t *provided_password, uint32_t provided_password_length,
+        uint8_t **auth_token, uint32_t *auth_token_length, bool *request_reenroll) {
+    if (error_ != 0) {
+        return error_;
+    }
+
+    SizedBuffer password_handle_buffer(enrolled_password_handle_length);
+    memcpy(password_handle_buffer.buffer.get(), enrolled_password_handle,
+            enrolled_password_handle_length);
+    SizedBuffer provided_password_buffer(provided_password_length);
+    memcpy(provided_password_buffer.buffer.get(), provided_password, provided_password_length);
+
+    VerifyRequest request(uid, challenge, &password_handle_buffer, &provided_password_buffer);
+    VerifyResponse response;
+
+    gatekeeper_error_t error = Send(request, &response);
+
+    if (error == ERROR_RETRY) {
+        return response.retry_timeout;
+    } else if (error != ERROR_NONE) {
+        return -EINVAL;
+    }
+
+    if (auth_token != NULL && auth_token_length != NULL) {
+       *auth_token = response.auth_token.buffer.release();
+       *auth_token_length = response.auth_token.length;
+    }
+
+    if (request_reenroll != NULL) {
+        *request_reenroll = response.request_reenroll;
+    }
+
+    return 0;
+}
+
+gatekeeper_error_t TrustyGateKeeperDevice::Send(uint32_t command, const GateKeeperMessage& request,
+        GateKeeperMessage *response) {
+    uint32_t request_size = request.GetSerializedSize();
+    if (request_size > SEND_BUF_SIZE)
+        return ERROR_INVALID;
+    uint8_t send_buf[SEND_BUF_SIZE];
+    request.Serialize(send_buf, send_buf + request_size);
+
+    // Send it
+    uint8_t recv_buf[RECV_BUF_SIZE];
+    uint32_t response_size = RECV_BUF_SIZE;
+    int rc = trusty_gatekeeper_call(command, send_buf, request_size, recv_buf, &response_size);
+    if (rc < 0) {
+        ALOGE("error (%d) calling gatekeeper TA", rc);
+        return ERROR_INVALID;
+    }
+
+    const gatekeeper_message *msg = reinterpret_cast<gatekeeper_message *>(recv_buf);
+    const uint8_t *payload = msg->payload;
+
+    return response->Deserialize(payload, payload + response_size);
+}
+
+static inline TrustyGateKeeperDevice *convert_device(const gatekeeper_device *dev) {
+    return reinterpret_cast<TrustyGateKeeperDevice *>(const_cast<gatekeeper_device *>(dev));
+}
+
+/* static */
+int TrustyGateKeeperDevice::enroll(const struct gatekeeper_device *dev, uint32_t uid,
+            const uint8_t *current_password_handle, uint32_t current_password_handle_length,
+            const uint8_t *current_password, uint32_t current_password_length,
+            const uint8_t *desired_password, uint32_t desired_password_length,
+            uint8_t **enrolled_password_handle, uint32_t *enrolled_password_handle_length) {
+
+    if (dev == NULL ||
+            enrolled_password_handle == NULL || enrolled_password_handle_length == NULL ||
+            desired_password == NULL || desired_password_length == 0)
+        return -EINVAL;
+
+    // Current password and current password handle go together
+    if (current_password_handle == NULL || current_password_handle_length == 0 ||
+            current_password == NULL || current_password_length == 0) {
+        current_password_handle = NULL;
+        current_password_handle_length = 0;
+        current_password = NULL;
+        current_password_length = 0;
+    }
+
+    return convert_device(dev)->Enroll(uid, current_password_handle, current_password_handle_length,
+            current_password, current_password_length, desired_password, desired_password_length,
+            enrolled_password_handle, enrolled_password_handle_length);
+
+}
+
+/* static */
+int TrustyGateKeeperDevice::verify(const struct gatekeeper_device *dev, uint32_t uid,
+        uint64_t challenge, const uint8_t *enrolled_password_handle,
+        uint32_t enrolled_password_handle_length, const uint8_t *provided_password,
+        uint32_t provided_password_length, uint8_t **auth_token, uint32_t *auth_token_length,
+        bool *request_reenroll) {
+
+    if (dev == NULL || enrolled_password_handle == NULL ||
+            provided_password == NULL) {
+        return -EINVAL;
+    }
+
+    return convert_device(dev)->Verify(uid, challenge, enrolled_password_handle,
+            enrolled_password_handle_length, provided_password, provided_password_length,
+            auth_token, auth_token_length, request_reenroll);
+}
+};
diff --git a/trusty/gatekeeper/trusty_gatekeeper.h b/trusty/gatekeeper/trusty_gatekeeper.h
new file mode 100644
index 0000000..82108dc
--- /dev/null
+++ b/trusty/gatekeeper/trusty_gatekeeper.h
@@ -0,0 +1,126 @@
+/*
+ * Copyright (C) 2014 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 TRUSTY_GATEKEEPER_H
+#define TRUSTY_GATEKEEPER_H
+
+#include <hardware/gatekeeper.h>
+#include <gatekeeper/gatekeeper_messages.h>
+
+#include "gatekeeper_ipc.h"
+
+namespace gatekeeper {
+
+class TrustyGateKeeperDevice {
+    public:
+
+    TrustyGateKeeperDevice(const hw_module_t* module);
+    ~TrustyGateKeeperDevice();
+
+    hw_device_t* hw_device();
+
+    /**
+     * Enrolls password_payload, which should be derived from a user selected pin or password,
+     * with the authentication factor private key used only for enrolling authentication
+     * factor data.
+     *
+     * Returns: 0 on success or an error code less than 0 on error.
+     * On error, enrolled_password will not be allocated.
+     */
+    int Enroll(uint32_t uid, const uint8_t *current_password_handle,
+            uint32_t current_password_handle_length, const uint8_t *current_password,
+            uint32_t current_password_length, const uint8_t *desired_password,
+            uint32_t desired_password_length, uint8_t **enrolled_password_handle,
+            uint32_t *enrolled_password_handle_length);
+
+    /**
+     * Verifies provided_password matches expected_password after enrolling
+     * with the authentication factor private key.
+     *
+     * Implementations of this module may retain the result of this call
+     * to attest to the recency of authentication.
+     *
+     * On success, writes the address of a verification token to verification_token,
+     *
+     * Returns: 0 on success or an error code less than 0 on error
+     * On error, verification token will not be allocated
+     */
+    int Verify(uint32_t uid, uint64_t challenge, const uint8_t *enrolled_password_handle,
+            uint32_t enrolled_password_handle_length, const uint8_t *provided_password,
+            uint32_t provided_password_length, uint8_t **auth_token, uint32_t *auth_token_length,
+            bool *request_reenroll);
+
+    private:
+
+    gatekeeper_error_t Send(uint32_t command, const GateKeeperMessage& request,
+                           GateKeeperMessage* response);
+
+    gatekeeper_error_t Send(const EnrollRequest& request, EnrollResponse *response) {
+        return Send(GK_ENROLL, request, response);
+    }
+
+    gatekeeper_error_t Send(const VerifyRequest& request, VerifyResponse *response) {
+        return Send(GK_VERIFY, request, response);
+    }
+
+    // Static methods interfacing the HAL API with the TrustyGateKeeper device
+
+    /**
+     * Enrolls desired_password, which should be derived from a user selected pin or password,
+     * with the authentication factor private key used only for enrolling authentication
+     * factor data.
+     *
+     * If there was already a password enrolled, it should be provided in
+     * current_password_handle, along with the current password in current_password
+     * that should validate against current_password_handle.
+     *
+     * Returns: 0 on success or an error code less than 0 on error.
+     * On error, enrolled_password_handle will not be allocated.
+     */
+    static int enroll(const struct gatekeeper_device *dev, uint32_t uid,
+            const uint8_t *current_password_handle, uint32_t current_password_handle_length,
+            const uint8_t *current_password, uint32_t current_password_length,
+            const uint8_t *desired_password, uint32_t desired_password_length,
+            uint8_t **enrolled_password_handle, uint32_t *enrolled_password_handle_length);
+
+    /**
+     * Verifies provided_password matches enrolled_password_handle.
+     *
+     * Implementations of this module may retain the result of this call
+     * to attest to the recency of authentication.
+     *
+     * On success, writes the address of a verification token to auth_token,
+     * usable to attest password verification to other trusted services. Clients
+     * may pass NULL for this value.
+     *
+     * Returns: 0 on success or an error code less than 0 on error
+     * On error, verification token will not be allocated
+     */
+    static int verify(const struct gatekeeper_device *dev, uint32_t uid, uint64_t challenge,
+            const uint8_t *enrolled_password_handle, uint32_t enrolled_password_handle_length,
+            const uint8_t *provided_password, uint32_t provided_password_length,
+            uint8_t **auth_token, uint32_t *auth_token_length, bool *request_reenroll);
+
+    static int close_device(hw_device_t* dev);
+
+    gatekeeper_device device_;
+    int error_;
+
+};
+}
+
+#endif
+
diff --git a/trusty/gatekeeper/trusty_gatekeeper_ipc.c b/trusty/gatekeeper/trusty_gatekeeper_ipc.c
new file mode 100644
index 0000000..a1c319e
--- /dev/null
+++ b/trusty/gatekeeper/trusty_gatekeeper_ipc.c
@@ -0,0 +1,91 @@
+/*
+ * Copyright (C) 2015 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 <errno.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define LOG_TAG "TrustyGateKeeper"
+#include <cutils/log.h>
+#include <trusty/tipc.h>
+
+#include "trusty_gatekeeper_ipc.h"
+#include "gatekeeper_ipc.h"
+
+#define TRUSTY_DEVICE_NAME "/dev/trusty-ipc-dev0"
+
+static int handle_ = 0;
+
+int trusty_gatekeeper_connect() {
+    int rc = tipc_connect(TRUSTY_DEVICE_NAME, GATEKEEPER_PORT);
+    if (rc < 0) {
+        return rc;
+    }
+
+    handle_ = rc;
+    return 0;
+}
+
+int trusty_gatekeeper_call(uint32_t cmd, void *in, uint32_t in_size, uint8_t *out,
+                           uint32_t *out_size) {
+    if (handle_ == 0) {
+        ALOGE("not connected\n");
+        return -EINVAL;
+    }
+
+    size_t msg_size = in_size + sizeof(struct gatekeeper_message);
+    struct gatekeeper_message *msg = malloc(msg_size);
+    msg->cmd = cmd;
+    memcpy(msg->payload, in, in_size);
+
+    ssize_t rc = write(handle_, msg, msg_size);
+    free(msg);
+
+    if (rc < 0) {
+        ALOGE("failed to send cmd (%d) to %s: %s\n", cmd,
+                GATEKEEPER_PORT, strerror(errno));
+        return -errno;
+    }
+
+    rc = read(handle_, out, *out_size);
+    if (rc < 0) {
+        ALOGE("failed to retrieve response for cmd (%d) to %s: %s\n",
+                cmd, GATEKEEPER_PORT, strerror(errno));
+        return -errno;
+    }
+
+    if ((size_t) rc < sizeof(struct gatekeeper_message)) {
+        ALOGE("invalid response size (%d)\n", (int) rc);
+        return -EINVAL;
+    }
+
+    msg = (struct gatekeeper_message *) out;
+
+    if ((cmd | GK_RESP_BIT) != msg->cmd) {
+        ALOGE("invalid command (%d)\n", msg->cmd);
+        return -EINVAL;
+    }
+
+    *out_size = ((size_t) rc) - sizeof(struct gatekeeper_message);
+    return rc;
+}
+
+void trusty_gatekeeper_disconnect() {
+    if (handle_ != 0) {
+        tipc_close(handle_);
+    }
+}
+
diff --git a/trusty/gatekeeper/trusty_gatekeeper_ipc.h b/trusty/gatekeeper/trusty_gatekeeper_ipc.h
new file mode 100644
index 0000000..f8de7f8
--- /dev/null
+++ b/trusty/gatekeeper/trusty_gatekeeper_ipc.h
@@ -0,0 +1,24 @@
+/*
+ * Copyright (C) 2015 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.
+ */
+
+__BEGIN_DECLS
+
+int trusty_gatekeeper_connect();
+int trusty_gatekeeper_call(uint32_t cmd, void *in, uint32_t in_size, uint8_t *out,
+                           uint32_t *out_size);
+void trusty_gatekeeper_disconnect();
+
+__END_DECLS