tree e542df792c6392c75bcbac4a98b978009d31d280
parent ccfcc8ced7346abdf80f4b9f77b5cc0b2164bf15
author Shuhei Takahashi <nya@google.com> 1462943049 +0900
committer Christopher Ferris <cferris@google.com> 1464033196 -0700

Run fsync tests on mutable filesystem.

The purpose of those tests is to ensure fsync succeeds for
directories. However, they try to call fsync for / (the root
filesystem) that is usually mounted read-only, which does not
make sense because the whole point of fsync is to flush
uncommitted changes to the filesystem.

In fact, some well-known read-only filesystems (e.g. squashfs)
does not support fsync, so these tests fail if we use such
filesystems as the root filesystem.

This patch changes the tests to call fsync against /data
instead. /data is a user data partition and should be always
mounted read-write.

Bug: 28681455

(cherry picked from commit cfa3262ce46fdec81cb011ec78273df68c325c9c)

Change-Id: I3e50f7b6ef07e96138711eef1f678f90cc9eb632