tests/btrfs/179

   1 #! /bin/bash
   2 # SPDX-License-Identifier: GPL-2.0
   3 # Copyright (C) 2019 SUSE Linux Products GmbH. All Rights Reserved.
   4 #
   5 # FS QA Test 179
   6 #
   7 # Test if btrfs will lockup at subvolume deletion when qgroups are enabled.
   8 #
   9 # This bug is going to be fixed by a patch for the kernel titled
  10 # "btrfs: qgroup: Don't trigger backref walk at delayed ref insert time".
  11 #
  12 . ./common/preamble
  13 _begin_fstest auto qgroup dangerous
  14
  15 # Import common functions.
  16 . ./common/filter
  17
  18 # real QA test starts here
  19
  20 # Modify as appropriate.
  21 _supported_fs btrfs
  22 _require_scratch
  23
  24 # default sleep interval
  25 sleep_time=1
  26
  27 # stress test runtime
  28 runtime=120
  29
  30 _scratch_mkfs > /dev/null 2>&1
  31 _scratch_mount
  32
  33 mkdir -p "$SCRATCH_MNT/snapshots"
  34 $BTRFS_UTIL_PROG subvolume create "$SCRATCH_MNT/src" > /dev/null
  35 $BTRFS_UTIL_PROG quota enable "$SCRATCH_MNT" > /dev/null
  36 $BTRFS_UTIL_PROG quota rescan -w "$SCRATCH_MNT" > /dev/null
  37
  38 fill_workload()
  39 {
  40         trap "wait; exit" SIGTERM
  41         local i=0
  42         while true; do
  43                 _pwrite_byte 0xcd 0 8K "$SCRATCH_MNT/src/large_$i" > /dev/null
  44                 _pwrite_byte 0xcd 0 2K "$SCRATCH_MNT/src/inline_$i" > /dev/null
  45
  46                 # Randomly remove some files for every 5 loop
  47                 if [ $(( $i % 5 )) -eq 0 ]; then
  48                         victim=$(ls "$SCRATCH_MNT/src" | sort -R | head -n1)
  49                         rm "$SCRATCH_MNT/src/$victim"
  50                 fi
  51                 i=$((i + 1))
  52         done
  53 }
  54
  55 snapshot_workload()
  56 {
  57         trap "wait; exit" SIGTERM
  58         local i=0
  59         while true; do
  60                 sleep $sleep_time
  61                 $BTRFS_UTIL_PROG subvolume snapshot "$SCRATCH_MNT/src" \
  62                         "$SCRATCH_MNT/snapshots/$i" > /dev/null
  63                 i=$((i + 1))
  64         done
  65 }
  66
  67 delete_workload()
  68 {
  69         trap "wait; exit" SIGTERM
  70         while true; do
  71                 sleep $((sleep_time * 2))
  72                 victim=$(ls "$SCRATCH_MNT/snapshots" | sort -R | head -n1)
  73                 if [ -z "$victim" ]; then
  74                         # No snapshots available, sleep and retry later.
  75                         continue
  76                 fi
  77                 $BTRFS_UTIL_PROG subvolume delete \
  78                         "$SCRATCH_MNT/snapshots/$victim" > /dev/null
  79         done
  80 }
  81
  82 fill_workload &
  83 fill_pid=$!
  84
  85 sleep $((sleep_time * 2))
  86 snapshot_workload &
  87 snapshot_pid=$!
  88 delete_workload &
  89 delete_pid=$!
  90
  91 sleep $runtime
  92 kill $fill_pid
  93 wait $fill_pid
  94 kill $snapshot_pid
  95 wait $snapshot_pid
  96 kill $delete_pid
  97 wait $delete_pid
  98
  99 # By the async nature of qgroup tree scan and subvolume delete, the latest
 100 # qgroup counts at the time of umount might not be upto date, if it isn't
 101 # then the check will report the difference in count. The difference in
 102 # qgroup counts are anyway updated in the following mount, so it is not a
 103 # real issue that this test case is trying to verify. So make sure the
 104 # qgroup counts are in sync before unmount happens.
 105
 106 $BTRFS_UTIL_PROG subvolume sync $SCRATCH_MNT >> $seqres.full
 107
 108 # success, all done
 109 echo "Silence is golden"
 110
 111 status=0
 112 exit