Add RFS format support

Change-Id: Ifd1e5ce9875c3eaacc1cec1759b67e672894e279

bmlutils/bmlutils.c

@@ -171,3 +171,37 @@ int cmd_bml_get_partition_device(const char *partition, char *device)
 {
     return -1;
 }
+
+int run_exec_process ( char **argv);
+
+int format_rfs_device (const char *device, const char *path) {
+    const char *fatsize = "32";
+    const char *sectorsize = "1";
+
+    if (strcmp(path, "/datadata") == 0 || strcmp(path, "/cache") == 0) {
+        fatsize = "16";
+    }
+
+    // Just in case /data sector size needs to be altered
+    else if (strcmp(path, "/data") == 0 ) {
+        sectorsize = "1";
+    } 
+
+    // dump 10KB of zeros to partition before format due to fat.format bug
+    char ofdevice[PATH_MAX];
+    snprintf(ofdevice, sizeof(ofdevice), "of=%s", device);
+    const char *rfszerodump[] = {"/sbin/dd", "if=/dev/zero", ofdevice, "bs=4096", "count=10", NULL};
+    if(run_exec_process((char **)rfszerodump)) {
+        printf("failure while running rfszerodump\n");
+        return -1;
+    }
+
+    // Run fat.format
+    const char *fatformat[] = {"/sbin/fat.format", "-F", fatsize, "-S", "4096", "-s", sectorsize, device, NULL};
+    if(run_exec_process((char **)fatformat)) {
+        printf("failure while running fat.format\n");
+        return -1;
+    }
+
+    return 0;
+}

bmlutils/bmlutils.h

@@ -0,0 +1,6 @@
+#ifndef BMLUTILS_H_
+#define BMLUTILS_H_
+
+int format_rfs_device (const char *device, const char *path);
+
+#endif // BMLUTILS_H_

extendedcommands.c

@@ -41,6 +41,7 @@
 #include "edify/expr.h"
 #include <libgen.h>
 #include "mtdutils/mtdutils.h"
+#include "bmlutils/bmlutils.h"
 
 
 int signature_check_enabled = 1;
@@ -450,6 +451,18 @@ int format_device(const char *device, const char *path, const char *fs_type) {
         return -1;
     }
 
+    if (strcmp(fs_type, "rfs") == 0) {
+        if (ensure_path_unmounted(path) != 0) {
+            LOGE("format_volume failed to unmount \"%s\"\n", v->mount_point);
+            return -1;
+        }
+        if (0 != format_rfs_device(device, path)) {
+            LOGE("format_volume: format_rfs_device failed on %s\n", device);
+            return -1;
+        }
+        return 0;
+    }
+ 
     if (strcmp(v->mount_point, path) != 0) {
         return format_unknown_device(v->device, path, NULL);
     }

utilities/Android.mk

@@ -61,3 +61,16 @@ include $(BUILD_PREBUILT)
 
 
 endif
+
+ifdef BOARD_HAS_RFS_FILESYSTEM
+
+include $(CLEAR_VARS)
+LOCAL_MODULE := fat.format
+LOCAL_MODULE_TAGS := eng
+LOCAL_MODULE_CLASS := RECOVERY_EXECUTABLES
+LOCAL_MODULE_PATH := $(TARGET_RECOVERY_ROOT_OUT)/sbin
+LOCAL_SRC_FILES := $(LOCAL_MODULE)
+include $(BUILD_PREBUILT)
+
+endif
+