tests/generic/050

   1 #! /bin/bash
   2 # SPDX-License-Identifier: GPL-2.0
   3 # Copyright (c) 2009 Christoph Hellwig.
   4 #
   5 # FS QA Test No. 050
   6 #
   7 # Check out various mount/remount/unmount scenarious on a read-only blockdev.
   8 #
   9 seq=`basename $0`
  10 seqres=$RESULT_DIR/$seq
  11 echo "QA output created by $seq"
  12
  13 here=`pwd`
  14 tmp=/tmp/$$
  15 status=1        # failure is the default!
  16
  17 _cleanup()
  18 {
  19         cd /
  20         blockdev --setrw $SCRATCH_DEV
  21 }
  22 trap "_cleanup; exit \$status" 0 1 2 3 15
  23
  24 # get standard environment, filters and checks
  25 . ./common/rc
  26 . ./common/filter
  27
  28 # real QA test starts here
  29 _supported_fs generic
  30 _supported_os Linux
  31
  32 _require_scratch_nocheck
  33 _require_scratch_shutdown
  34 _require_local_device $SCRATCH_DEV
  35 _require_norecovery
  36
  37 _scratch_mkfs >/dev/null 2>&1
  38
  39 filter_ro_mount() {
  40         local arg=""
  41
  42         if [ -n "$expect_mount_failure" ]; then
  43                 arg="s|mount: $SCRATCH_MNT: permission denied|mount: device write-protected, mounting read-only|g"
  44         fi
  45         sed -e "$arg" | _filter_ro_mount
  46 }
  47
  48 # Mounting with quota on XFS requires a writable fs, which means
  49 # we expect to fail the ro blockdev test with with EPERM.
  50 expect_mount_failure=
  51 if [ "$FSTYP" = "xfs" ] && echo "$MOUNT_OPTIONS" | grep -q quota ; then
  52         expect_mount_failure=1
  53 fi
  54
  55 #
  56 # Mark the device read-only
  57 #
  58 echo "setting device read-only"
  59 blockdev --setro $SCRATCH_DEV
  60
  61 #
  62 # Mount it, and make sure we can't write to it, and we can unmount it again
  63 #
  64 echo "mounting read-only block device:"
  65 _try_scratch_mount 2>&1 | filter_ro_mount
  66 if [ "${PIPESTATUS[0]}" -eq 0 ]; then
  67         echo "touching file on read-only filesystem (should fail)"
  68         touch $SCRATCH_MNT/foo 2>&1 | _filter_scratch
  69
  70         #
  71         # Apparently this used to be broken at some point:
  72         #       http://oss.sgi.com/bugzilla/show_bug.cgi?id=807
  73         #
  74         echo "unmounting read-only filesystem"
  75         _scratch_unmount 2>&1 | _filter_scratch
  76 elif [ -n "${expect_mount_failure}" ]; then
  77         # Mount failed, so simulate EROFS instead of scribbling on root fs
  78         echo "touching file on read-only filesystem (should fail)"
  79         echo "touch: cannot touch 'SCRATCH_MNT/foo': Read-only file system"
  80         echo "unmounting read-only filesystem"
  81 else
  82         echo "Mount failed, though it wasn't supposed to!"
  83 fi
  84
  85 echo "setting device read-write"
  86 blockdev --setrw $SCRATCH_DEV
  87
  88 echo "mounting read-write block device:"
  89 _try_scratch_mount 2>&1 | _filter_scratch
  90
  91 echo "touch files"
  92 touch $SCRATCH_MNT/{0,1,2,3,4,5,6,7,8,9}{0,1,2,3,4,5,6,7,8,9}
  93
  94 echo "going down:"
  95 _scratch_shutdown -f
  96
  97 echo "unmounting shutdown filesystem:"
  98 _scratch_unmount 2>&1 | _filter_scratch
  99
 100 echo "setting device read-only"
 101 blockdev --setro $SCRATCH_DEV
 102
 103 #
 104 # Mounting a filesystem that requires log-recovery fails unless
 105 # -o norecovery is used.
 106 #
 107 echo "mounting filesystem that needs recovery on a read-only device:"
 108 _try_scratch_mount 2>&1 | _filter_ro_mount
 109
 110 echo "unmounting read-only filesystem"
 111 _scratch_unmount 2>&1 | _filter_scratch | _filter_ending_dot
 112
 113 #
 114 # This is the way out if the underlying device really is read-only.
 115 # Doesn't mean it's a good idea in practice, more a last resort
 116 # data recovery hack.
 117 #
 118 echo "mounting filesystem with -o norecovery on a read-only device:"
 119 _try_scratch_mount -o norecovery 2>&1 | filter_ro_mount
 120 if [ "${PIPESTATUS[0]}" -eq 0 ]; then
 121         echo "unmounting read-only filesystem"
 122         _scratch_unmount 2>&1 | _filter_scratch
 123 elif [ -n "${expect_mount_failure}" ]; then
 124         # Mount failed, simulate correct output
 125         echo "unmounting read-only filesystem"
 126 else
 127         echo "Mount failed, though it wasn't supposed to!"
 128 fi
 129
 130 echo "setting device read-write"
 131 blockdev --setrw $SCRATCH_DEV
 132
 133 #
 134 # But log recovery is performed when mount with -o ro as long as
 135 # the underlying device is not write protected.
 136 #
 137 echo "mounting filesystem that needs recovery with -o ro:"
 138 _try_scratch_mount -o ro 2>&1 | _filter_scratch
 139
 140 # success, all done
 141 echo "*** done"
 142 rm -f $seqres.full
 143 status=0