tests/test-retry-reopen-fail.sh

   1 #!/usr/bin/env bash
   2 # nbdkit
   3 # Copyright Red Hat
   4 #
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   6 # modification, are permitted provided that the following conditions are
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  13 # notice, this list of conditions and the following disclaimer in the
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  17 # used to endorse or promote products derived from this software without
  18 # specific prior written permission.
  19 #
  20 # THIS SOFTWARE IS PROVIDED BY RED HAT AND CONTRIBUTORS ''AS IS'' AND
  21 # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  22 # THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
  23 # PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL RED HAT OR
  24 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  25 # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  26 # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
  27 # USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  28 # ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  29 # OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  30 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31 # SUCH DAMAGE.
  32
  33 # This test is similar to test-retry.sh but it also tests the case
  34 # where the reopen operation fails.
  35
  36 source ./functions.sh
  37 set -e
  38 set -x
  39
  40 fail=0
  41
  42 requires_plugin sh
  43 requires qemu-io --version
  44 requires dd iflag=count_bytes </dev/null
  45
  46 files="retry-reopen-fail-count retry-reopen-fail-open-count
  47        retry-reopen-fail-status"
  48 rm -f $files
  49 cleanup_fn rm -f $files
  50
  51 # do_test retries mintime expcount status
  52 do_test ()
  53 {
  54     retries=$1
  55     mintime=$2
  56     expcount=$3
  57     status=$4
  58
  59     echo 0 > retry-reopen-fail-count
  60     echo 0 > retry-reopen-fail-open-count
  61     : > retry-reopen-fail-status
  62     start_t=$SECONDS
  63
  64     # Create a custom plugin which will test retrying.
  65     nbdkit -v -U - \
  66            sh - \
  67            --filter=retry retry-delay=1 retries=$retries \
  68            --run 'qemu-io -r -f raw $nbd -c "r 0 512" -c "r 0 512"
  69                   echo $? >> retry-reopen-fail-status' <<'EOF'
  70 #!/usr/bin/env bash
  71 handle=$2
  72 check_handle () {
  73     if [ x"$handle" != xhandle ]; then
  74         echo 22 >> retry-reopen-fail-status
  75         exit 22
  76     fi
  77 }
  78 case "$1" in
  79     open)
  80         # Count how many times the connection is (re-)opened.
  81         read i < retry-reopen-fail-open-count
  82         ((i++))
  83         echo $i > retry-reopen-fail-open-count
  84         if [ $i -eq 2 ]; then
  85             echo "EIO open failed" >&2
  86             exit 1
  87         fi
  88         echo "handle"
  89         ;;
  90     pread)
  91         check_handle
  92         # Fail 2 times then succeed.
  93         read i < retry-reopen-fail-count
  94         ((i++))
  95         echo $i > retry-reopen-fail-count
  96         if [ $i -le 2 ]; then
  97             echo "EIO pread failed" >&2
  98             exit 1
  99         else
 100             dd if=/dev/zero count=$3 iflag=count_bytes
 101         fi
 102         ;;
 103
 104     get_size)
 105         check_handle
 106         echo 512 ;;
 107     *) exit 2 ;;
 108 esac
 109 EOF
 110
 111     # Check that running time appears reasonable.
 112     end_t=$SECONDS
 113     if [ $((end_t - start_t)) -lt $mintime ]; then
 114         echo "$0: test ran too quickly"
 115         fail=1
 116     fi
 117
 118     # Check the handle was opened as often as expected.
 119     read open_count < retry-reopen-fail-open-count
 120     if [ $open_count -ne $expcount ]; then
 121         echo "$0: open-count ($open_count) != $expcount"
 122         fail=1
 123     fi
 124
 125     # Check the exit status of qemu-io
 126     read qemu_status < retry-reopen-fail-status
 127     if [ $qemu_status -ne $status ]; then
 128         echo "$0: status ($qemu_status) != $status"
 129         fail=1
 130     fi
 131 }
 132
 133 # In this first test we should see 3 failures:
 134 # first pread FAILS
 135 # retry and wait 1 seconds
 136 # open FAILS
 137 # retry and wait 2 seconds
 138 # open succeeds
 139 # first pread FAILS
 140 # retry and wait 4 seconds
 141 # open succeeds
 142 # first pread succeeds
 143 # second pread succeeds
 144
 145 # The minimum time for the test should be 1+2+4 = 7 seconds.
 146 do_test 5 7 4 0
 147
 148 # In this second test we should see the following:
 149 # first pread FAILS
 150 # retry and wait 1 seconds
 151 # open FAILS, ending first pread in failure
 152 # first pread FAILS
 153 # second pread requires open
 154 # open succeeds
 155 # second pread FAILS
 156 # retry and wait 1 seconds
 157 # open succeeds
 158 # second pread succeeds
 159
 160 # The minimum time for the test should be 1+1 = 2 seconds.
 161 do_test 1 2 3 1
 162
 163 exit $fail