usr/src/test/zfs-tests/tests/functional/nopwrite/nopwrite_volume.ksh

   1 #!/usr/bin/ksh
   2
   3 #
   4 # This file and its contents are supplied under the terms of the
   5 # Common Development and Distribution License ("CDDL"), version 1.0.
   6 # You may only use this file in accordance with the terms of version
   7 # 1.0 of the CDDL.
   8 #
   9 # A full copy of the text of the CDDL should have accompanied this
  10 # source.  A copy of the CDDL is also available via the Internet at
  11 # http://www.illumos.org/license/CDDL.
  12 #
  13
  14 #
  15 # Copyright (c) 2012, 2016 by Delphix. All rights reserved.
  16 #
  17
  18 . $STF_SUITE/include/libtest.shlib
  19 . $STF_SUITE/tests/functional/nopwrite/nopwrite.shlib
  20
  21 #
  22 # Description:
  23 # Verify that nopwrite cannot be enabled on volumes
  24 #
  25 # Strategy:
  26 # 1. Create a clone of a volume that fits the criteria for nopwrite.
  27 # 2. Overwrite the same blocks from the origin vol and verify that
  28 # new space is consumed.
  29 #
  30
  31 verify_runnable "global"
  32 origin="$TESTPOOL/$TESTVOL"
  33 clone="$TESTPOOL/clone"
  34 vol="/dev/zvol/rdsk/$origin"
  35 volclone="/dev/zvol/rdsk/$clone"
  36 log_onexit cleanup
  37
  38 function cleanup
  39 {
  40         datasetexists $origin && log_must zfs destroy -R $origin
  41         # No need to recreate the volume as no other tests expect it.
  42 }
  43
  44 log_assert "nopwrite works on volumes"
  45
  46 log_must zfs set compress=on $origin
  47 log_must zfs set checksum=sha256 $origin
  48 dd if=/dev/urandom of=$vol bs=8192 count=4096 conv=notrunc >/dev/null \
  49     2>&1 || log_fail "dd into $orgin failed."
  50 zfs snapshot $origin@a || log_fail "zfs snap failed"
  51 log_must zfs clone $origin@a $clone
  52 log_must zfs set compress=on $clone
  53 log_must zfs set checksum=sha256 $clone
  54 dd if=$vol of=$volclone bs=8192 count=4096 conv=notrunc >/dev/null 2>&1 || \
  55     log_fail "dd into $clone failed."
  56 log_must verify_nopwrite $origin $origin@a $clone
  57
  58 log_pass "nopwrite works on volumes"