tests/cp/fiemap-perf

   1 #!/bin/sh
   2 # ensure that a sparse file is copied efficiently, by default
   3
   4 # Copyright (C) 2011 Free Software Foundation, Inc.
   5
   6 # This program is free software: you can redistribute it and/or modify
   7 # it under the terms of the GNU General Public License as published by
   8 # the Free Software Foundation, either version 3 of the License, or
   9 # (at your option) any later version.
  10
  11 # This program is distributed in the hope that it will be useful,
  12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 # GNU General Public License for more details.
  15
  16 # You should have received a copy of the GNU General Public License
  17 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18
  19 . "${srcdir=.}/init.sh"; path_prepend_ ../src
  20 print_ver_ cp
  21
  22 # Require a fiemap-enabled FS.
  23 touch fiemap_chk
  24 fiemap_capable_ fiemap_chk ||
  25   skip_ "this file system lacks FIEMAP support"
  26
  27 # Exclude ext3 (or unknown fs types)
  28 # as the emulated extent scanning is slow
  29 df -t ext3 . >/dev/null &&
  30   skip_ "ext3 has known slow FIEMAP scanning"
  31
  32 # Create a large-but-sparse file.
  33 timeout 10 truncate -s1T f || framework_failure_
  34
  35 # Disable this test on old BTRFS (e.g. Fedora 14)
  36 # which reports (unwritten) extents for holes.
  37 filefrag f || skip_ 'the `filefrag` utility is missing'
  38 filefrag f | grep -F ': 0 extents found' > /dev/null ||
  39   skip_ 'this file system reports extents for holes'
  40
  41 # Nothing can read (much less write) that many bytes in so little time.
  42 timeout 10 cp f f2 || fail=1
  43
  44 # Ensure that the sparse file copied through fiemap has the same size
  45 # in bytes as the original.
  46 test "$(stat --printf %s f)" = "$(stat --printf %s f2)" || fail=1
  47
  48 Exit $fail