1 #! /bin/ksh -p
   2 #
   3 # CDDL HEADER START
   4 #
   5 # The contents of this file are subject to the terms of the
   6 # Common Development and Distribution License (the "License").
   7 # You may not use this file except in compliance with the License.
   8 #
   9 # You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10 # or http://www.opensolaris.org/os/licensing.
  11 # See the License for the specific language governing permissions
  12 # and limitations under the License.
  13 #
  14 # When distributing Covered Code, include this CDDL HEADER in each
  15 # file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16 # If applicable, add the following below this CDDL HEADER, with the
  17 # fields enclosed by brackets "[]" replaced with your own identifying
  18 # information: Portions Copyright [yyyy] [name of copyright owner]
  19 #
  20 # CDDL HEADER END
  21 #
  22 
  23 #
  24 # Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
  25 # Use is subject to license terms.
  26 #
  27 
  28 #
  29 # Copyright (c) 2013 by Delphix. All rights reserved.
  30 #
  31 
  32 . $STF_SUITE/include/libtest.shlib
  33 . $STF_SUITE/tests/functional/snapshot/snapshot.cfg
  34 
  35 #
  36 # DESCRIPTION:
  37 # Create a null snapshot i.e. a snapshot created before file system
  38 # activity is empty.
  39 #
  40 # STRATEGY:
  41 # 1. Empty a file system
  42 # 2. Take a snapshot of the empty file system.
  43 # 3. Populate the file system
  44 # 4. Verify the snapshot is still empty
  45 #
  46 
  47 verify_runnable "both"
  48 
  49 function cleanup
  50 {
  51         snapexists $SNAPFS
  52         [[ $? -eq 0 ]] && \
  53                 log_must $ZFS destroy $SNAPFS
  54 
  55         [[ -e $TESTDIR ]] && \
  56                 log_must $RM -rf $TESTDIR/* > /dev/null 2>&1
  57 }
  58 
  59 log_assert "Verify that a snapshot of an empty file system remains empty."
  60 
  61 log_onexit cleanup
  62 
  63 [[ -n $TESTDIR ]] && \
  64     log_must $RM -rf $TESTDIR/* > /dev/null 2>&1
  65 
  66 log_must $ZFS snapshot $SNAPFS
  67 FILE_COUNT=`$LS -Al $SNAPDIR | $GREP -v "total 0" | wc -l`
  68 if [[ $FILE_COUNT -ne 0 ]]; then
  69         $LS $SNAPDIR
  70         log_fail "BEFORE: $SNAPDIR contains $FILE_COUNT files(s)."
  71 fi
  72 
  73 typeset -i COUNT=10
  74 
  75 log_note "Populate the $TESTDIR directory"
  76 typeset -i i=1
  77 while [[ $i -lt $COUNT ]]; do
  78         log_must $FILE_WRITE -o create -f $TESTDIR/file$i \
  79            -b $BLOCKSZ -c $NUM_WRITES -d $i
  80 
  81         (( i = i + 1 ))
  82 done
  83 
  84 FILE_COUNT=`$LS -Al $SNAPDIR | $GREP -v "total 0" | wc -l`
  85 if [[ $FILE_COUNT -ne 0 ]]; then
  86         $LS $SNAPDIR
  87         log_fail "AFTER: $SNAPDIR contains $FILE_COUNT files(s)."
  88 fi
  89 
  90 log_pass "The NULL snapshot remains empty."