tests/10ddf-fail-create-race

   1 # This test creates a RAID1, fails a disk, and immediately
   2 # (simultaneously) creates a new array. This tests for a possible
   3 # race where the meta data reflecting the disk failure may not
   4 # be written when the 2nd array is created.
   5 . tests/env-ddf-template
   6
   7 mdadm --zero-superblock $dev8 $dev9 $dev10 $dev11 $dev12 $dev13
   8
   9 mdadm -CR $container -e ddf -l container -n 2 $dev11 $dev12
  10 #$dir/mdadm -CR $member0 -l raid1 -n 2 $container -z 10000  >/tmp/mdmon.txt 2>&1
  11 mdadm -CR $member0 -l raid1 -n 2 $container -z 10000
  12 check wait
  13 fail0=$dev11
  14 mdadm --fail $member0 $fail0 &
  15
  16 # The test can succeed two ways:
  17 # 1) mdadm -C member1 fails - in this case the meta data
  18 # was already on disk when the create attempt was made
  19 # 2) mdadm -C succeeds in the first place (meta data not on disk yet),
  20 # but mdmon detects the problem and sets the disk faulty.
  21
  22 if mdadm -CR $member1 -l raid1 -n 2 $container; then
  23
  24    echo create should have failed / race condition?
  25
  26    check wait
  27    set -- $(get_raiddisks $member0)
  28    d0=$1
  29    ret=0
  30    if [ $1 = $fail0 -o $2 = $fail0 ]; then
  31        ret=1
  32    else
  33        set -- $(get_raiddisks $member1)
  34        if [ $1 = $fail0 -o $2 = $fail0 ]; then
  35            ret=1
  36        fi
  37    fi
  38    if [ $ret -eq 1 ]; then
  39        echo ERROR: failed disk $fail0 is still a RAID member
  40        echo $member0: $(get_raiddisks $member0)
  41        echo $member1: $(get_raiddisks $member1)
  42    fi
  43    tmp=$(mktemp /tmp/mdest-XXXXXX)
  44    mdadm -E $d0 >$tmp
  45    if [ x$(grep -c 'state\[[01]\] : Degraded' $tmp) != x2 ]; then
  46        echo ERROR: non-degraded array found
  47        mdadm -E $d0
  48        ret=1
  49    fi
  50    if ! grep -q '^  *0  *[0-9a-f]\{8\} .*Offline, Failed' $tmp; then
  51        echo ERROR: disk 0 not marked as failed in meta data
  52        mdadm -E $d0
  53        ret=1
  54    fi
  55    rm -f $tmp
  56 else
  57    ret=0
  58 fi
  59
  60 [ -f /tmp/mdmon.txt ] && {
  61     cat /tmp/mdmon.txt
  62     rm -f /tmp/mdmon.txt
  63 }
  64
  65 [ $ret -eq 0 ]
  66