usr/src/test/zfs-tests/tests/functional/nopwrite/nopwrite_sync.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 . $STF_SUITE/tests/functional/nopwrite/nopwrite.shlib
  20
  21 #
  22 # Description:
  23 # Verify that nopwrite works for sync writes
  24 #
  25 # Strategy:
  26 # 1. Create an origin fs with compression and sha256.
  27 # 2. Clone origin such that it inherits the properies.
  28 # 3. Use dd with the sync flag to test the sync write path.
  29 #
  30
  31 verify_runnable "global"
  32 origin="$TESTPOOL/$TESTFS"
  33 log_onexit cleanup
  34
  35 function cleanup
  36 {
  37         datasetexists $origin && log_must zfs destroy -R $origin
  38         log_must zfs create -o mountpoint=$TESTDIR $origin
  39 }
  40
  41 log_assert "nopwrite works for sync writes"
  42
  43 log_must zfs set compress=on $origin
  44 log_must zfs set checksum=sha256 $origin
  45 gnu_dd if=/dev/urandom of=$TESTDIR/file bs=1024k count=$MEGS oflag=sync \
  46     conv=notrunc >/dev/null 2>&1 || log_fail "dd into $TESTDIR/file failed."
  47 zfs snapshot $origin@a || log_fail "zfs snap failed"
  48 log_must zfs clone $origin@a $origin/clone
  49
  50 gnu_dd if=/$TESTDIR/file of=/$TESTDIR/clone/file bs=1024k count=$MEGS \
  51     oflag=sync conv=notrunc >/dev/null 2>&1 || log_fail "dd failed."
  52
  53 log_must verify_nopwrite $origin $origin@a $origin/clone
  54
  55 log_pass "nopwrite works for sync writes"