tests/generic/411

   1 #! /bin/bash
   2 # SPDX-License-Identifier: GPL-2.0
   3 # Copyright (c) 2016 Red Hat Inc.  All Rights Reserved.
   4 #
   5 # FS QA Test 411
   6 #
   7 # This test cover linux commit 7ae8fd0, kernel two mnt_group_id == 0
   8 # (no peer)vfsmount as peers. It case kernel dereference a NULL
   9 # address.
  10 #
  11 seq=`basename $0`
  12 seqres=$RESULT_DIR/$seq
  13 echo "QA output created by $seq"
  14
  15 here=`pwd`
  16 tmp=/tmp/$$
  17 status=1        # failure is the default!
  18 trap "_cleanup; exit \$status" 0 1 2 3 15
  19
  20 _cleanup()
  21 {
  22         cd /
  23         rm -f $tmp.*
  24         _clear_mount_stack
  25         # make sure there's no bug cause dentry isn't be freed
  26         rm -rf $MNTHEAD
  27 }
  28
  29 # get standard environment, filters and checks
  30 . ./common/rc
  31 . ./common/filter
  32
  33 # remove previous $seqres.full before test
  34 rm -f $seqres.full
  35
  36 # real QA test starts here
  37 _supported_fs generic
  38 _supported_os Linux
  39 _require_test
  40 _require_scratch
  41 _require_local_device $SCRATCH_DEV
  42
  43 fs_stress()
  44 {
  45         local target=$1
  46
  47         $FSSTRESS_PROG -z -n 500 -p 5 \
  48                        -f creat=5 \
  49                        -f mkdir=5 \
  50                        -f dwrite=1 \
  51                        -f dread=1 \
  52                        -f link=2 \
  53                        -f rename=1 \
  54                        -f rmdir=2 \
  55                        -f unlink=1 \
  56                        -f symlink=1 \
  57                        -f write=1 \
  58                        -f read=1 \
  59                        -f chown=1 \
  60                        -f getdents=1 \
  61                        -f fiemap=1 \
  62                        -d $target >/dev/null
  63         sync
  64 }
  65
  66 # prepare some mountpoint dir
  67 MNTHEAD=$TEST_DIR/$seq
  68 rm -rf $MNTHEAD
  69 mkdir $MNTHEAD 2>>$seqres.full
  70 mpA=$MNTHEAD/"$$"_mpA
  71 mpB=$MNTHEAD/"$$"_mpB
  72 mpC=$MNTHEAD/"$$"_mpC
  73
  74 find_mnt()
  75 {
  76         echo "------"
  77         findmnt -n -o TARGET,SOURCE $SCRATCH_DEV | \
  78                 sed -e "s;$mpA;mpA;g" \
  79                     -e "s;$mpB;mpB;g" \
  80                     -e "s;$mpC;mpC;g" | \
  81                 _filter_spaces | _filter_testdir_and_scratch | sort
  82         echo "======"
  83 }
  84
  85 start_test()
  86 {
  87         local type=$1
  88
  89         _scratch_mkfs >$seqres.full 2>&1
  90         _get_mount -t $FSTYP $SCRATCH_DEV $MNTHEAD
  91         $MOUNT_PROG --make-"${type}" $MNTHEAD
  92         mkdir $mpA $mpB $mpC
  93 }
  94
  95 end_test()
  96 {
  97         _clear_mount_stack
  98         rm -rf $mpA $mpB $mpC
  99 }
 100
 101 #
 102 #            shared            New FS           shared
 103 #      -----------------------[A/mnt1]----------------------
 104 #     |                           |                         |
 105 #     |                bind       |    bind                 |       New FS
 106 # [C/mnt1]--[slave C]<------[shared A]------>[slave B]--[B/mnt1]--[B/mnt1/mnt2]
 107 #
 108 crash_test()
 109 {
 110         start_test shared
 111
 112         _get_mount -t $FSTYP $SCRATCH_DEV $mpA
 113         mkdir $mpA/mnt1
 114         $MOUNT_PROG --make-shared $mpA
 115         _get_mount --bind $mpA $mpB
 116         _get_mount --bind $mpA $mpC
 117         $MOUNT_PROG --make-slave $mpB
 118         $MOUNT_PROG --make-slave $mpC
 119         _get_mount -t $FSTYP $SCRATCH_DEV $mpA/mnt1
 120         mkdir $mpA/mnt1/mnt2
 121
 122         _get_mount -t $FSTYP $SCRATCH_DEV $mpB/mnt1/mnt2
 123         find_mnt
 124         fs_stress $mpB/mnt1/mnt2
 125
 126         end_test
 127         echo "crash test passed"
 128 }
 129
 130 crash_test
 131
 132 # success, all done
 133 status=0
 134 exit