tests/zfs-tests/tests/functional/cli_root/zfs_mount/zfs_mount_remount.ksh

   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 2017, loli10K <ezomori.nozomu@gmail.com>. All rights reserved.
  25 #
  26
  27 . $STF_SUITE/include/libtest.shlib
  28 . $STF_SUITE/tests/functional/cli_root/zfs_mount/zfs_mount.kshlib
  29
  30 #
  31 # DESCRIPTION:
  32 # Verify remount functionality, expecially on readonly objects.
  33 #
  34 # STRATEGY:
  35 # 1. Prepare a filesystem and a snapshot
  36 # 2. Verify we can (re)mount the dataset readonly/read-write
  37 # 3. Verify we can mount the snapshot and it's mounted readonly
  38 # 4. Verify we can't remount it read-write
  39 # 5. Verify we can remount a dataset readonly and unmount it with
  40 #    encryption=on and sync=disabled (issue #7753)
  41 # 6. Re-import the pool readonly
  42 # 7. Verify we can't remount its filesystem read-write
  43 #
  44
  45 verify_runnable "both"
  46
  47 function cleanup
  48 {
  49         log_must_busy zpool export $TESTPOOL
  50         log_must zpool import $TESTPOOL
  51         snapexists $TESTSNAP && log_must zfs destroy $TESTSNAP
  52         [[ -d $MNTPSNAP ]] && log_must rmdir $MNTPSNAP
  53         return 0
  54 }
  55
  56 #
  57 # Verify the $filesystem is mounted readonly
  58 # This is preferred over "log_mustnot touch $fs" because we actually want to
  59 # verify the error returned is EROFS
  60 #
  61 function readonlyfs # filesystem
  62 {
  63         typeset filesystem="$1"
  64
  65         file_write -o create -f $filesystem/file.dat
  66         ret=$?
  67         if [[ $ret != 30 ]]; then
  68                 log_fail "Writing to $filesystem did not return EROFS ($ret)."
  69         fi
  70 }
  71
  72 #
  73 # Verify $dataset is mounted with $option
  74 #
  75 function checkmount # dataset option
  76 {
  77         typeset dataset="$1"
  78         typeset option="$2"
  79
  80         options="$(awk -v ds="$dataset" '$1 == ds { print $4 }' /proc/mounts)"
  81         if [[ "$options" == '' ]]; then
  82                 log_fail "Dataset $dataset is not mounted"
  83         elif [[ ! -z "${options##*$option*}" ]]; then
  84                 log_fail "Dataset $dataset is not mounted with expected "\
  85                     "option $option ($options)"
  86         else
  87                 log_note "Dataset $dataset is mounted with option $option"
  88         fi
  89 }
  90
  91 log_assert "Verify remount functionality on both filesystem and snapshots"
  92
  93 log_onexit cleanup
  94
  95 # 1. Prepare a filesystem and a snapshot
  96 TESTFS=$TESTPOOL/$TESTFS
  97 TESTSNAP="$TESTFS@snap"
  98 datasetexists $TESTFS || log_must zfs create $TESTFS
  99 snapexists $TESTSNAP || log_must zfs snapshot $TESTSNAP
 100 log_must zfs set readonly=off $TESTFS
 101 MNTPFS="$(get_prop mountpoint $TESTFS)"
 102 MNTPSNAP="$TESTDIR/zfs_snap_mount"
 103 log_must mkdir -p $MNTPSNAP
 104
 105 # 2. Verify we can (re)mount the dataset readonly/read-write
 106 log_must touch $MNTPFS/file.dat
 107 checkmount $TESTFS 'rw'
 108 log_must mount -o remount,ro $TESTFS $MNTPFS
 109 readonlyfs $MNTPFS
 110 checkmount $TESTFS 'ro'
 111 log_must mount -o remount,rw $TESTFS $MNTPFS
 112 log_must touch $MNTPFS/file.dat
 113 checkmount $TESTFS 'rw'
 114
 115 # 3. Verify we can (re)mount the snapshot readonly
 116 log_must mount -t zfs $TESTSNAP $MNTPSNAP
 117 readonlyfs $MNTPSNAP
 118 checkmount $TESTSNAP 'ro'
 119 log_must mount -o remount,ro $TESTSNAP $MNTPSNAP
 120 readonlyfs $MNTPSNAP
 121 checkmount $TESTSNAP 'ro'
 122 log_must umount $MNTPSNAP
 123
 124 # 4. Verify we can't remount a snapshot read-write
 125 # The "mount -o rw" command will succeed but the snapshot is mounted readonly.
 126 # The "mount -o remount,rw" command must fail with an explicit error.
 127 log_must mount -t zfs -o rw $TESTSNAP $MNTPSNAP
 128 readonlyfs $MNTPSNAP
 129 checkmount $TESTSNAP 'ro'
 130 log_mustnot mount -o remount,rw $TESTSNAP $MNTPSNAP
 131 readonlyfs $MNTPSNAP
 132 checkmount $TESTSNAP 'ro'
 133 log_must umount $MNTPSNAP
 134
 135 # 5. Verify we can remount a dataset readonly and unmount it with
 136 #    encryption=on and sync=disabled (issue #7753)
 137 log_must eval "echo 'password' | zfs create -o sync=disabled \
 138     -o encryption=on -o keyformat=passphrase $TESTFS/crypt"
 139 CRYPT_MNTPFS="$(get_prop mountpoint $TESTFS/crypt)"
 140 log_must touch $CRYPT_MNTPFS/file.dat
 141 log_must mount -o remount,ro $TESTFS/crypt $CRYPT_MNTPFS
 142 log_must umount -f $CRYPT_MNTPFS
 143 zpool sync $TESTPOOL
 144
 145 # 6. Re-import the pool readonly
 146 log_must zpool export $TESTPOOL
 147 log_must zpool import -o readonly=on $TESTPOOL
 148
 149 # 7. Verify we can't remount its filesystem read-write
 150 readonlyfs $MNTPFS
 151 checkmount $TESTFS 'ro'
 152 log_mustnot mount -o remount,rw $MNTPFS
 153 readonlyfs $MNTPFS
 154 checkmount $TESTFS 'ro'
 155
 156 log_pass "Both filesystem and snapshots can be remounted correctly."