usr/src/test/zfs-tests/tests/functional/mount/umountall_001.ksh

   1 #!/usr/bin/ksh -p
   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) 2013, 2016 by Delphix. All rights reserved.
  16 #
  17
  18 . $STF_SUITE/include/libtest.shlib
  19
  20 #
  21 # DESCRIPTION:
  22 # There are myriad problems associated with trying to test umountall in a way
  23 # that works reliable across different systems. Some filesystems won't unmount
  24 # because they're busy. Some won't remount because they were legacy mounts in
  25 # the first place. etc...
  26 # Make a best approximation by calling umountall with the -n option, and verify
  27 # that the list of things it would try to unmout makes sense.
  28 #
  29 # STRATEGY:
  30 # 1. Make a list of file systems umountall is known to ignore.
  31 # 2. Append all ZFS file systems on this system.
  32 # 3. Run umountall -n and verify the file systems it reports are in the list.
  33 #
  34
  35 log_must zfs mount -a
  36 for fs in 1 2 3 ; do
  37         log_must mounted $TESTPOOL/$TESTFS.$fs
  38 done
  39
  40 # This is the list we check the output of umountall -n against. We seed it
  41 # with these values because umountall will ignore them, and they're possible
  42 # (though most are improbable) ZFS filesystem mountpoints.
  43 zfs_list="/ /lib /sbin /tmp /usr /var /var/log /var/run"
  44
  45 # Append our ZFS filesystems to the list, not worrying about duplicates.
  46 for fs in $(mount -p | awk '{if ($4 == "zfs") print $3}'); do
  47         zfs_list="$zfs_list $fs"
  48 done
  49
  50 fs=''
  51 for fs in $(umountall -n -F zfs 2>&1 | awk '{print $2}'); do
  52         for i in $zfs_list; do
  53                 [[ $fs = $i ]] && continue 2
  54         done
  55         log_fail "umountall -n -F zfs tried to unmount $fs"
  56 done
  57 [[ -n $fs ]] || log_fail "umountall -n -F zfs produced no output"
  58
  59 log_pass "All ZFS file systems would have been unmounted"