tests/zfs-tests/tests/functional/features/async_destroy/async_destroy_001_pos.ksh

   1 #!/bin/ksh -p
   2 #
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  11 # See the License for the specific language governing permissions
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  23 #
  24 # Copyright (c) 2013, 2016 by Delphix. All rights reserved.
  25 #
  26
  27 . $STF_SUITE/include/libtest.shlib
  28
  29 #
  30 # DESCRIPTION:
  31 # Exercise the traversal suspend/resume code in async_destroy by
  32 # destroying a file system that has more blocks than we can free
  33 # in a single txg.
  34 #
  35 # STRATEGY:
  36 # 1. Create a file system
  37 # 2. Set recordsize to 512 to create the maximum number of blocks
  38 # 3. Set compression to off to force zero-ed blocks to be written
  39 # 4. dd a lot of data from /dev/zero to the file system
  40 # 5. Destroy the file system
  41 # 6. Wait for the freeing property to go to 0
  42 # 7. Use zdb to check for leaked blocks
  43 #
  44
  45 TEST_FS=$TESTPOOL/async_destroy
  46
  47 verify_runnable "both"
  48
  49 function cleanup
  50 {
  51         datasetexists $TEST_FS && log_must zfs destroy $TEST_FS
  52         log_must set_tunable64 zfs_async_block_max_blocks 100000
  53 }
  54
  55 log_onexit cleanup
  56 log_assert "async_destroy can suspend and resume traversal"
  57
  58 log_must zfs create -o recordsize=1k -o compression=off $TEST_FS
  59
  60 # Fill with 128,000 blocks.
  61 log_must dd bs=1024k count=128 if=/dev/zero of=/$TEST_FS/file
  62
  63 #
  64 # Decrease the max blocks to free each txg, so that freeing takes
  65 # long enough that we can observe it.
  66 #
  67 log_must set_tunable64 zfs_async_block_max_blocks 100
  68
  69 log_must sync
  70 log_must zfs destroy $TEST_FS
  71
  72 #
  73 # We monitor the freeing property, to verify we can see blocks being
  74 # freed while the suspend/resume code is exercised.
  75 #
  76 t0=$SECONDS
  77 count=0
  78 while [[ $((SECONDS - t0)) -lt 10 ]]; do
  79         [[ "0" != "$(zpool list -Ho freeing $TESTPOOL)" ]] && ((count++))
  80         [[ $count -gt 1 ]] && break
  81         sleep 1
  82 done
  83
  84 [[ $count -eq 0 ]] && log_fail "Freeing property remained empty"
  85
  86 #
  87 # After a bit, go back to allowing an unlimited amount of freeing
  88 # per txg.
  89 #
  90 sleep 10
  91 log_must set_tunable64 zfs_async_block_max_blocks 100000
  92
  93 # Wait for everything to be freed.
  94 while [[ "0" != "$(zpool list -Ho freeing $TESTPOOL)" ]]; do
  95         [[ $((SECONDS - t0)) -gt 180 ]] && \
  96             log_fail "Timed out waiting for freeing to drop to zero"
  97 done
  98
  99 # Check for leaked blocks.
 100 log_must zdb -b $TESTPOOL
 101
 102 log_pass "async_destroy can suspend and resume traversal"