tests/test-retry-open.sh

   1 #!/usr/bin/env bash
   2 # nbdkit
   3 # Copyright Red Hat
   4 #
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  20 # THIS SOFTWARE IS PROVIDED BY RED HAT AND CONTRIBUTORS ''AS IS'' AND
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  32
  33 source ./functions.sh
  34 set -e
  35 set -x
  36
  37 requires_plugin sh
  38 requires qemu-io --version
  39
  40 # Note that test-retry.sh uses "retry-open-count", so choose
  41 # another name here.
  42 files="retry-open2-count"
  43 rm -f $files
  44 cleanup_fn rm -f $files
  45
  46 echo 0 > retry-open2-count
  47 start_t=$SECONDS
  48
  49 # Create a custom plugin which will test retrying open.
  50 nbdkit -v -U - \
  51        sh - \
  52        --filter=retry retry-delay=1 \
  53        --run 'qemu-io -f raw -c "r -P0 0 512" $nbd || :' <<'EOF'
  54 #!/usr/bin/env bash
  55 case "$1" in
  56     open)
  57         # Count how many times the connection is (re-)opened.
  58         read i < retry-open2-count
  59         echo $((i+1)) > retry-open2-count
  60         if test $i -lt 1; then
  61           echo EIO >&2; exit 1
  62         fi
  63         ;;
  64     get_size) echo 512 ;;
  65     pread) dd if=/dev/zero count=$3 iflag=count_bytes ;;
  66     *) exit 2 ;;
  67 esac
  68 EOF
  69
  70 # In this test we should see 1 failure:
  71 # first open FAILS
  72 # retry and wait 1 second
  73 # second open PASSES
  74
  75 # The minimum time for the test should be 1 second.
  76 end_t=$SECONDS
  77 if [ $((end_t - start_t)) -lt 1 ]; then
  78     echo "$0: test ran too quickly"
  79     exit 1
  80 fi
  81
  82 # Check the handle was opened 2 times (first open + one reopen).
  83 read open_count < retry-open2-count
  84 if [ $open_count -ne 2 ]; then
  85     echo "$0: open-count ($open_count) != 2"
  86     exit 1
  87 fi