From 8f62566566360663fcc333660b5ecd2bf2df37b8 Mon Sep 17 00:00:00 2001
From: Matthew Maurer <mmaurer@google.com>
Date: Fri, 10 Jul 2020 13:50:32 -0700
Subject: [PATCH] trusty: rpmb_dev: Prevent desync between rpmb_dev and
 storageproxyd

The mock RPMB can get out of sync with TD storage blocks in the event of
panic or crash. Making this O_SYNC will prevent this from happening.

Bug: 160723681
Test: None
Change-Id: Ia16dfc88ceae56e4e9724a42ac0db492c0e707a4
---
 trusty/utils/rpmb_dev/rpmb_dev.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/trusty/utils/rpmb_dev/rpmb_dev.c b/trusty/utils/rpmb_dev/rpmb_dev.c
index af97eba9f..5de1efa47 100644
--- a/trusty/utils/rpmb_dev/rpmb_dev.c
+++ b/trusty/utils/rpmb_dev/rpmb_dev.c
@@ -591,7 +591,7 @@ int main(int argc, char** argv) {
         return EXIT_SUCCESS;
     }
 
-    open_flags = O_RDWR;
+    open_flags = O_RDWR | O_SYNC;
     if (init) {
         open_flags |= O_CREAT | O_TRUNC;
     }