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diff --git a/src/ceph/src/os/fs/FS.cc b/src/ceph/src/os/fs/FS.cc
deleted file mode 100644
index d15a6bf..0000000
--- a/src/ceph/src/os/fs/FS.cc
+++ /dev/null
@@ -1,187 +0,0 @@
-// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
-// vim: ts=8 sw=2 smarttab
-/*
- * Ceph - scalable distributed file system
- *
- * Copyright (C) 2014 Red Hat
- *
- * This is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License version 2.1, as published by the Free Software
- * Foundation.  See file COPYING.
- *
- */
-
-#include <errno.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-
-// from include/linux/falloc.h:
-#ifndef FALLOC_FL_PUNCH_HOLE
-# define FALLOC_FL_PUNCH_HOLE 0x2
-#endif
-
-#include "FS.h"
-
-#include "acconfig.h"
-
-#ifdef HAVE_LIBXFS
-#include "XFS.h"
-#endif
-
-#if defined(DARWIN) || defined(__FreeBSD__)
-#include <sys/mount.h>
-#else
-#include <sys/vfs.h>
-#endif
-#include "include/compat.h"
-
-// ---------------
-
-FS *FS::create(uint64_t f_type)
-{
-  switch (f_type) {
-#ifdef HAVE_LIBXFS
-  case XFS_SUPER_MAGIC:
-    return new XFS;
-#endif
-  default:
-    return new FS;
-  }
-}
-
-FS *FS::create_by_fd(int fd)
-{
-  struct statfs st;
-  ::fstatfs(fd, &st);
-  return create(st.f_type);
-}
-
-// ---------------
-
-int FS::set_alloc_hint(int fd, uint64_t hint)
-{
-  return 0;  // no-op
-}
-
-#ifdef HAVE_NAME_TO_HANDLE_AT
-int FS::get_handle(int fd, std::string *h)
-{
-  char buf[sizeof(struct file_handle) + MAX_HANDLE_SZ];
-  struct file_handle *fh = (struct file_handle *)buf;
-  int mount_id;
-
-  fh->handle_bytes = MAX_HANDLE_SZ;
-  int r = name_to_handle_at(fd, "", fh, &mount_id, AT_EMPTY_PATH);
-  if (r < 0) {
-    return -errno;
-  }
-  *h = std::string(buf, fh->handle_bytes + sizeof(struct file_handle));
-  return 0;
-}
-
-int FS::open_handle(int mount_fd, const std::string& h, int flags)
-{
-  if (h.length() < sizeof(struct file_handle)) {
-    return -EINVAL;
-  }
-  struct file_handle *fh = (struct file_handle *)h.data();
-  if (fh->handle_bytes > h.length()) {
-    return -ERANGE;
-  }
-  int fd = open_by_handle_at(mount_fd, fh, flags);
-  if (fd < 0)
-    return -errno;
-  return fd;
-}
-
-#else // HAVE_NAME_TO_HANDLE_AT
-
-int FS::get_handle(int fd, std::string *h)
-{
-  return -EOPNOTSUPP;
-}
-
-int FS::open_handle(int mount_fd, const std::string& h, int flags)
-{
-  return -EOPNOTSUPP;
-}
-
-#endif // HAVE_NAME_TO_HANDLE_AT
-
-int FS::copy_file_range(int to_fd, uint64_t to_offset,
-			int from_fd,
-			uint64_t from_offset, uint64_t from_len)
-{
-  assert(0 == "write me");
-}
-
-int FS::zero(int fd, uint64_t offset, uint64_t length)
-{
-  int r;
-
-  /*
-
-    From the fallocate(2) man page:
-
-       Specifying the FALLOC_FL_PUNCH_HOLE flag (available since Linux 2.6.38)
-       in mode deallocates space (i.e., creates a  hole)  in  the  byte  range
-       starting  at offset and continuing for len bytes.  Within the specified
-       range, partial filesystem  blocks  are  zeroed,  and  whole  filesystem
-       blocks  are removed from the file.  After a successful call, subsequent
-       reads from this range will return zeroes.
-
-       The FALLOC_FL_PUNCH_HOLE flag must be ORed with FALLOC_FL_KEEP_SIZE  in
-       mode;  in  other words, even when punching off the end of the file, the
-       file size (as reported by stat(2)) does not change.
-
-       Not all  filesystems  support  FALLOC_FL_PUNCH_HOLE;  if  a  filesystem
-       doesn't  support the operation, an error is returned.  The operation is
-       supported on at least the following filesystems:
-
-       *  XFS (since Linux 2.6.38)
-
-       *  ext4 (since Linux 3.0)
-
-       *  Btrfs (since Linux 3.7)
-
-       *  tmpfs (since Linux 3.5)
-
-   So: we only do this is PUNCH_HOLE *and* KEEP_SIZE are defined.
-
-  */
-#if !defined(DARWIN) && !defined(__FreeBSD__)
-# ifdef CEPH_HAVE_FALLOCATE
-#  ifdef FALLOC_FL_KEEP_SIZE
-  // first try fallocate
-  r = fallocate(fd, FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE, offset, length);
-  if (r < 0) {
-    r = -errno;
-  }
-  if (r != -EOPNOTSUPP) {
-    goto out;  // a real error
-  }
-  // if that failed (-EOPNOTSUPP), fall back to writing zeros.
-#  endif
-# endif
-#endif
-
-  {
-    // fall back to writing zeros
-    bufferlist bl;
-    bl.append_zero(length);
-    r = ::lseek64(fd, offset, SEEK_SET);
-    if (r < 0) {
-      r = -errno;
-      goto out;
-    }
-    r = bl.write_fd(fd);
-  }
-
- out:
-  return r;
-}
-
-// ---------------
-