7290 ZFS test suite needs to control what utilities it can run
Reviewed by: Dan Kimmel <dan.kimmel@delphix.com>
Reviewed by: Matthew Ahrens <mahrens@delphix.com>

*** 24,34 ****
  # Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
  # Use is subject to license terms.
  #
  
  #
! # Copyright (c) 2013 by Delphix. All rights reserved.
  #
  
  . $STF_SUITE/include/libtest.shlib
  . $STF_SUITE/tests/functional/reservation/reservation.shlib
  
--- 24,34 ----
  # Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
  # Use is subject to license terms.
  #
  
  #
! # Copyright (c) 2013, 2016 by Delphix. All rights reserved.
  #
  
  . $STF_SUITE/include/libtest.shlib
  . $STF_SUITE/tests/functional/reservation/reservation.shlib
  
*** 55,68 ****
      "written to top level filesystem"
  
  function cleanup
  {
          datasetexists $TESTPOOL/$TESTVOL && \
!         log_must $ZFS destroy $TESTPOOL/$TESTVOL
  
!         [[ -e $TESTDIR/$TESTFILE1 ]] && log_must $RM -rf $TESTDIR/$TESTFILE1
!         [[ -e $TESTDIR/$TESTFILE2 ]] && log_must $RM -rf $TESTDIR/$TESTFILE2
  }
  log_onexit cleanup
  
  space_avail=$(largest_volsize_from_pool $TESTPOOL)
  
--- 55,68 ----
      "written to top level filesystem"
  
  function cleanup
  {
          datasetexists $TESTPOOL/$TESTVOL && \
!         log_must zfs destroy $TESTPOOL/$TESTVOL
  
!         [[ -e $TESTDIR/$TESTFILE1 ]] && log_must rm -rf $TESTDIR/$TESTFILE1
!         [[ -e $TESTDIR/$TESTFILE2 ]] && log_must rm -rf $TESTDIR/$TESTFILE2
  }
  log_onexit cleanup
  
  space_avail=$(largest_volsize_from_pool $TESTPOOL)
  
*** 73,99 ****
  # left free in the pool which we can quickly fill.
  #
  ((resv_size_set = space_avail - RESV_FREE_SPACE))
  resv_size_set=$(floor_volsize $resv_size_set)
  
! log_must $ZFS create -V $resv_size_set $TESTPOOL/$TESTVOL
  
  space_avail_still=`get_prop available $TESTPOOL`
  
  fill_size=$((space_avail_still + $RESV_TOLERANCE))
  write_count=$((fill_size / BLOCK_SIZE))
  
  # Now fill up the filesystem (which doesn't have a reservation set
  # and thus will use up whatever free space is left in the pool).
! $FILE_WRITE -o create -f $TESTDIR/$TESTFILE1 -b $BLOCK_SIZE -c $write_count -d 0
  ret=$?
  if (($ret != $ENOSPC)); then
          log_fail "Did not get ENOSPC as expected (got $ret)."
  fi
  
! log_must $ZFS set refreservation=none $TESTPOOL/$TESTVOL
  
! log_must $FILE_WRITE -o create -f $TESTDIR/$TESTFILE2 -b $PAGESIZE \
      -c 1000 -d 0
  
  log_pass "Setting top level volume reservation to 'none' allows more " \
      "data to be written to the top level filesystem"
--- 73,99 ----
  # left free in the pool which we can quickly fill.
  #
  ((resv_size_set = space_avail - RESV_FREE_SPACE))
  resv_size_set=$(floor_volsize $resv_size_set)
  
! log_must zfs create -V $resv_size_set $TESTPOOL/$TESTVOL
  
  space_avail_still=`get_prop available $TESTPOOL`
  
  fill_size=$((space_avail_still + $RESV_TOLERANCE))
  write_count=$((fill_size / BLOCK_SIZE))
  
  # Now fill up the filesystem (which doesn't have a reservation set
  # and thus will use up whatever free space is left in the pool).
! file_write -o create -f $TESTDIR/$TESTFILE1 -b $BLOCK_SIZE -c $write_count -d 0
  ret=$?
  if (($ret != $ENOSPC)); then
          log_fail "Did not get ENOSPC as expected (got $ret)."
  fi
  
! log_must zfs set refreservation=none $TESTPOOL/$TESTVOL
  
! log_must file_write -o create -f $TESTDIR/$TESTFILE2 -b pagesize \
      -c 1000 -d 0
  
  log_pass "Setting top level volume reservation to 'none' allows more " \
      "data to be written to the top level filesystem"