Create convert_fbe breadcrumb file to support conversion to FBE
Change-Id: I38b29e1e34ea793e4b87cd27a1d39fa905fddf7a
diff --git a/recovery.cpp b/recovery.cpp
index 5f3bfca..e348b84 100644
--- a/recovery.cpp
+++ b/recovery.cpp
@@ -76,7 +76,10 @@
static const char *LOG_FILE = "/cache/recovery/log";
static const char *LAST_INSTALL_FILE = "/cache/recovery/last_install";
static const char *LOCALE_FILE = "/cache/recovery/last_locale";
+static const char *CONVERT_FBE_DIR = "/cache/recovery/convert_fbe";
+static const char *CONVERT_FBE_FILE = "/cache/recovery/convert_fbe/convert_fbe";
static const char *CACHE_ROOT = "/cache";
+static const char *DATA_ROOT = "/data";
static const char *SDCARD_ROOT = "/sdcard";
static const char *TEMPORARY_LOG_FILE = "/tmp/recovery.log";
static const char *TEMPORARY_INSTALL_FILE = "/tmp/last_install";
@@ -503,6 +506,7 @@
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);
@@ -557,7 +561,25 @@
ui->Print("Formatting %s...\n", volume);
ensure_path_unmounted(volume);
- int result = format_volume(volume);
+
+ int result;
+
+ if (is_data && reason && strcmp(reason, "convert_fbe") == 0) {
+ // Create convert_fbe breadcrumb file to signal to init
+ // to convert to file based encryption, not full disk encryption
+ mkdir(CONVERT_FBE_DIR, 0700);
+ FILE* f = fopen(CONVERT_FBE_FILE, "wb");
+ if (!f) {
+ ui->Print("Failed to convert to file encryption\n");
+ return true;
+ }
+ 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) {
while (head) {
diff --git a/roots.cpp b/roots.cpp
index 12c6b5e..f361cb8 100644
--- a/roots.cpp
+++ b/roots.cpp
@@ -175,7 +175,7 @@
return WEXITSTATUS(status);
}
-int format_volume(const char* volume) {
+int format_volume(const char* volume, const char* directory) {
Volume* v = volume_for_path(volume);
if (v == NULL) {
LOGE("unknown volume \"%s\"\n", volume);
@@ -241,7 +241,7 @@
}
int result;
if (strcmp(v->fs_type, "ext4") == 0) {
- result = make_ext4fs(v->blk_device, length, volume, sehandle);
+ result = make_ext4fs_directory(v->blk_device, length, volume, sehandle, directory);
} else { /* Has to be f2fs because we checked earlier. */
if (v->key_loc != NULL && strcmp(v->key_loc, "footer") == 0 && length < 0) {
LOGE("format_volume: crypt footer + negative length (%zd) not supported on %s\n", length, v->fs_type);
@@ -273,6 +273,10 @@
return -1;
}
+int format_volume(const char* volume) {
+ return format_volume(volume, NULL);
+}
+
int setup_install_mounts() {
if (fstab == NULL) {
LOGE("can't set up install mounts: no fstab loaded\n");
diff --git a/roots.h b/roots.h
index 6e3b243..a14b7d9 100644
--- a/roots.h
+++ b/roots.h
@@ -41,6 +41,12 @@
// it is mounted.
int format_volume(const char* volume);
+// Reformat the given volume (must be the mount point only, eg
+// "/cache"), no paths permitted. Attempts to unmount the volume if
+// it is mounted.
+// Copies 'directory' to root of the newly formatted volume
+int format_volume(const char* volume, const char* directory);
+
// Ensure that all and only the volumes that packages expect to find
// mounted (/tmp and /cache) are mounted. Returns 0 on success.
int setup_install_mounts();