fs_mgr: fix the fs_mgr_setup_verity param name

The 'verify_dev' parameter for fs_mgr_setup_verity is confusing, since
it doesn't necessarily control the "verification" part of the function.
Instead, it merely allows the caller to skip the
wait_for_dm_verity_device part of the function. So, rename that
parameter for what it is.

b/27805372

Test: Boot sailfish

Change-Id: I024e02fd728f5cd5bb333d9c3b512861731fa215
Signed-off-by: Sandeep Patil <sspatil@google.com>
diff --git a/fs_mgr/fs_mgr.cpp b/fs_mgr/fs_mgr.cpp
index cc607d3..28d3397 100644
--- a/fs_mgr/fs_mgr.cpp
+++ b/fs_mgr/fs_mgr.cpp
@@ -661,6 +661,8 @@
     }
 }
 
+// TODO: add ueventd notifiers if they don't exist.
+// This is just doing a wait_for_device for maximum of 1s
 int fs_mgr_test_access(const char *device) {
     int tries = 25;
     while (tries--) {
diff --git a/fs_mgr/fs_mgr_verity.cpp b/fs_mgr/fs_mgr_verity.cpp
index 1ec4540..e829139 100644
--- a/fs_mgr/fs_mgr_verity.cpp
+++ b/fs_mgr/fs_mgr_verity.cpp
@@ -859,7 +859,10 @@
     *table = strdup(result.c_str());
 }
 
-int fs_mgr_setup_verity(struct fstab_rec *fstab, bool verify_dev)
+// prepares the verity enabled (MF_VERIFY / MF_VERIFYATBOOT) fstab record for
+// mount. The 'wait_for_verity_dev' parameter makes this function wait for the
+// verity device to get created before return
+int fs_mgr_setup_verity(struct fstab_rec *fstab, bool wait_for_verity_dev)
 {
     int retval = FS_MGR_SETUP_VERITY_FAIL;
     int fd = -1;
@@ -1026,7 +1029,7 @@
     }
 
     // make sure we've set everything up properly
-    if (verify_dev && fs_mgr_test_access(fstab->blk_device) < 0) {
+    if (wait_for_verity_dev && fs_mgr_test_access(fstab->blk_device) < 0) {
         goto out;
     }