tests/zfs-tests/tests/functional/mount/umountall_001.ksh

   1 #!/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.$fs
  38 done
  39
  40 # This is the list we check the output of umountall -n against. We seed it
  41 # with these values because umountall will ignore them, and they're possible
  42 # (though most are improbable) ZFS filesystem mountpoints.
  43 zfs_list="/ /lib /sbin /tmp /usr /var /var/adm /var/run"
  44
  45 # Append our ZFS filesystems to the list, not worrying about duplicates.
  46 if is_linux; then
  47         typeset mounts=$(mount | awk '{if ($5 == "zfs") print $3}')
  48 else
  49         typeset mounts=$(mount -p | awk '{if ($4 == "zfs") print $3}')
  50 fi
  51
  52 for fs in $mounts; do
  53         zfs_list="$zfs_list $fs"
  54 done
  55
  56 if is_linux; then
  57         mounts=$(umount --fake -av -t zfs 2>&1 | \
  58             grep "successfully umounted" | awk '{print $1}')
  59         # Fallback to /proc/mounts for umount(8) (util-linux-ng 2.17.2)
  60         if [[ -z $mounts ]]; then
  61                 mounts=$(awk '/zfs/ { print $2 }' /proc/mounts)
  62         fi
  63 else
  64         mounts=$(umountall -n -F zfs 2>&1 | awk '{print $2}')
  65 fi
  66
  67 fs=''
  68 for fs in $mounts; do
  69         for i in $zfs_list; do
  70                 [[ $fs = $i ]] && continue 2
  71         done
  72         log_fail "umountall -n -F zfs tried to unmount $fs"
  73 done
  74 [[ -n $mounts ]] || log_fail "umountall -n -F zfs produced no output"
  75
  76 log_pass "All ZFS file systems would have been unmounted"