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 seqfull=$0
  10 seq=`basename $0`
  11 seqres=$RESULT_DIR/$seq
  12 echo "QA output created by $seq"
  13
  14 here=`pwd`
  15 tmp=/tmp/$$
  16 status=1        # failure is the default!
  17
  18 _cleanup()
  19 {
  20         cd /
  21         blockdev --setrw $SCRATCH_DEV
  22 }
  23 trap "_cleanup; exit \$status" 0 1 2 3 15
  24
  25 # get standard environment, filters and checks
  26 . ./common/rc
  27 . ./common/filter
  28
  29 # real QA test starts here
  30 _supported_fs generic
  31 _supported_os Linux
  32
  33 _require_scratch_nocheck
  34 _require_scratch_shutdown
  35 _require_local_device $SCRATCH_DEV
  36 _require_norecovery
  37
  38 # Select appropriate output file
  39 features=""
  40 if ! _has_metadata_journaling $SCRATCH_DEV >/dev/null; then
  41         features="nojournal"
  42 fi
  43 _link_out_file "$features"
  44
  45 _scratch_mkfs >/dev/null 2>&1
  46
  47 filter_ro_mount() {
  48         local arg=""
  49
  50         if [ -n "$expect_mount_failure" ]; then
  51                 arg="s|mount: $SCRATCH_MNT: permission denied|mount: device write-protected, mounting read-only|g"
  52         fi
  53         sed -e "$arg" | _filter_ro_mount
  54 }
  55
  56 # Mounting with quota on XFS requires a writable fs, which means
  57 # we expect to fail the ro blockdev test with with EPERM.
  58 expect_mount_failure=
  59 if [ "$FSTYP" = "xfs" ] && echo "$MOUNT_OPTIONS" | grep -q quota ; then
  60         expect_mount_failure=1
  61 fi
  62
  63 #
  64 # Mark the device read-only
  65 #
  66 echo "setting device read-only"
  67 blockdev --setro $SCRATCH_DEV
  68
  69 #
  70 # Mount it, and make sure we can't write to it, and we can unmount it again
  71 #
  72 echo "mounting read-only block device:"
  73 _try_scratch_mount 2>&1 | filter_ro_mount
  74 if [ "${PIPESTATUS[0]}" -eq 0 ]; then
  75         echo "touching file on read-only filesystem (should fail)"
  76         touch $SCRATCH_MNT/foo 2>&1 | _filter_scratch
  77
  78         #
  79         # Apparently this used to be broken at some point:
  80         #       http://oss.sgi.com/bugzilla/show_bug.cgi?id=807
  81         #
  82         echo "unmounting read-only filesystem"
  83         _scratch_unmount 2>&1 | _filter_scratch
  84 elif [ -n "${expect_mount_failure}" ]; then
  85         # Mount failed, so simulate EROFS instead of scribbling on root fs
  86         echo "touching file on read-only filesystem (should fail)"
  87         echo "touch: cannot touch 'SCRATCH_MNT/foo': Read-only file system"
  88         echo "unmounting read-only filesystem"
  89 else
  90         echo "Mount failed, though it wasn't supposed to!"
  91 fi
  92
  93 echo "setting device read-write"
  94 blockdev --setrw $SCRATCH_DEV
  95
  96 echo "mounting read-write block device:"
  97 _try_scratch_mount 2>&1 | _filter_scratch
  98
  99 echo "touch files"
 100 touch $SCRATCH_MNT/{0,1,2,3,4,5,6,7,8,9}{0,1,2,3,4,5,6,7,8,9}
 101
 102 echo "going down:"
 103 _scratch_shutdown -f
 104
 105 echo "unmounting shutdown filesystem:"
 106 _scratch_unmount 2>&1 | _filter_scratch
 107
 108 echo "setting device read-only"
 109 blockdev --setro $SCRATCH_DEV
 110
 111 #
 112 # Mounting a filesystem that requires log-recovery fails unless
 113 # -o norecovery is used.
 114 #
 115 echo "mounting filesystem that needs recovery on a read-only device:"
 116 _try_scratch_mount 2>&1 | _filter_ro_mount
 117
 118 echo "unmounting read-only filesystem"
 119 _scratch_unmount 2>&1 | _filter_scratch | _filter_ending_dot
 120
 121 #
 122 # This is the way out if the underlying device really is read-only.
 123 # Doesn't mean it's a good idea in practice, more a last resort
 124 # data recovery hack.
 125 #
 126 echo "mounting filesystem with -o norecovery on a read-only device:"
 127 _try_scratch_mount -o norecovery 2>&1 | filter_ro_mount
 128 if [ "${PIPESTATUS[0]}" -eq 0 ]; then
 129         echo "unmounting read-only filesystem"
 130         _scratch_unmount 2>&1 | _filter_scratch
 131 elif [ -n "${expect_mount_failure}" ]; then
 132         # Mount failed, simulate correct output
 133         echo "unmounting read-only filesystem"
 134 else
 135         echo "Mount failed, though it wasn't supposed to!"
 136 fi
 137
 138 echo "setting device read-write"
 139 blockdev --setrw $SCRATCH_DEV
 140
 141 #
 142 # But log recovery is performed when mount with -o ro as long as
 143 # the underlying device is not write protected.
 144 #
 145 echo "mounting filesystem that needs recovery with -o ro:"
 146 _try_scratch_mount -o ro 2>&1 | _filter_scratch
 147
 148 # success, all done
 149 echo "*** done"
 150 rm -f $seqres.full
 151 status=0