ceph: do not chain inode updates to parent fsync

The fsync(dirfd) only covers namespace operations, not inode updates.
We do not need to cover setattr variants or O_TRUNC.

Reported-by: Al Viro <viro@xeniv.linux.org.uk>
Signed-off-by: Sage Weil <sage@inktank.com>
Reviewed-by: Yan, Zheng <zheng.z.yan@intel.com>

diff --cc fs/ceph/file.c
Simple merge

diff --cc fs/ceph/inode.c
Simple merge

diff --cc fs/ceph/ioctl.c
Simple merge

diff --cc fs/ceph/xattr.c
Simple merge