1 #!/bin/bash
   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 2009 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 . $STF_SUITE/tests/functional/zvol/zvol_common.shlib
  34 
  35 #
  36 # DESCRIPTION:
  37 #       Add a swap zvol, and consume most (not all) of the space. This test
  38 #       used to fill up swap, which can hang the system.
  39 #
  40 # STRATEGY:
  41 #       1. Create a new zvol and add it as swap
  42 #       2. Fill /tmp with 80% the size of the zvol
  43 #       5. Remove the new zvol, and restore original swap devices
  44 #
  45 
  46 verify_runnable "global"
  47 log_assert "Using a zvol as swap space, fill /tmp to 80%."
  48 
  49 vol=$TESTPOOL/$TESTVOL
  50 swapdev=/dev/zvol/dsk/$vol
  51 log_must $SWAP -a $swapdev
  52 
  53 # Get 80% of the number of 512 blocks in the zvol
  54 typeset -i count blks volsize=$(get_prop volsize $vol)
  55 ((blks = (volsize / 512) * 80 / 100))
  56 # Use 'blks' to determine a count for dd based on a 1M block size.
  57 ((count = blks / 2048))
  58 
  59 log_note "Fill 80% of swap"
  60 log_must $DD if=/dev/urandom of=/tmp/$TESTFILE bs=1048576 count=$count
  61 log_must $RM -f /tmp/$TESTFILE
  62 log_must $SWAP -d $swapdev
  63 
  64 log_pass "Using a zvol as swap space, fill /tmp to 80%."