tests/btrfs/192

   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 192
   6 #
   7 # Test btrfs consistency after each FUA for a workload with snapshot creation
   8 # and removal
   9 #
  10 seq=`basename $0`
  11 seqres=$RESULT_DIR/$seq
  12 echo "QA output created by $seq"
  13
  14 here=`pwd`
  15 tmp=/tmp/$$
  16 status=1        # failure is the default!
  17 trap "_cleanup; exit \$status" 0 1 2 3 15
  18
  19 _cleanup()
  20 {
  21         cd /
  22         kill -q $pid1 &> /dev/null
  23         kill -q $pid2 &> /dev/null
  24         "$KILLALL_PROG" -q $FSSTRESS_PROG &> /dev/null
  25         wait
  26         _log_writes_cleanup &> /dev/null
  27         rm -f $tmp.*
  28 }
  29
  30 # get standard environment, filters and checks
  31 . ./common/rc
  32 . ./common/filter
  33 . ./common/attr
  34 . ./common/dmlogwrites
  35
  36 # remove previous $seqres.full before test
  37 rm -f $seqres.full
  38
  39 # real QA test starts here
  40
  41 # Modify as appropriate.
  42 _supported_fs btrfs
  43
  44 _require_command "$KILLALL_PROG" killall
  45 _require_command "$BLKDISCARD_PROG" blkdiscard
  46 _require_btrfs_fs_feature "no_holes"
  47 _require_btrfs_mkfs_feature "no-holes"
  48 _require_log_writes
  49 _require_scratch
  50 _require_attrs
  51
  52 # We require a 4K nodesize to ensure the test isn't too slow
  53 if [ $(get_page_size) -ne 4096 ]; then
  54         _notrun "This test doesn't support non-4K page size yet"
  55 fi
  56
  57 runtime=30
  58 nr_cpus=$("$here/src/feature" -o)
  59 # cap nr_cpus to 8 to avoid spending too much time on hosts with many cpus
  60 if [ $nr_cpus -gt 8 ]; then
  61         nr_cpus=8
  62 fi
  63 fsstress_args=$(_scale_fsstress_args -w -d $SCRATCH_MNT -n 99999 -p $nr_cpus \
  64                 $FSSTRESS_AVOID)
  65 _log_writes_init $SCRATCH_DEV
  66
  67 # Discard the whole devices so when some tree pointer is wrong, it won't point
  68 # to some older valid tree blocks, so we can detect it.
  69 $BLKDISCARD_PROG $LOGWRITES_DMDEV > /dev/null 2>&1
  70
  71 # Use no-holes to avoid warnings of missing file extent items (expected
  72 # for holes due to mix of buffered and direct IO writes).
  73 # And use 4K nodesize to bump tree height.
  74 _log_writes_mkfs -O no-holes -n 4k >> $seqres.full
  75 _log_writes_mount
  76
  77 $BTRFS_UTIL_PROG subvolume create $SCRATCH_MNT/src > /dev/null
  78 mkdir -p $SCRATCH_MNT/snapshots
  79 mkdir -p $SCRATCH_MNT/src/padding
  80
  81 random_file()
  82 {
  83         local basedir=$1
  84         echo "$basedir/$(ls $basedir | sort -R | tail -1)"
  85 }
  86
  87 snapshot_workload()
  88 {
  89         trap "wait; exit" SIGTERM
  90
  91         local i=0
  92         while true; do
  93                 $BTRFS_UTIL_PROG subvolume snapshot \
  94                         $SCRATCH_MNT/src $SCRATCH_MNT/snapshots/$i \
  95                         > /dev/null
  96                 # Do something small to make snapshots different
  97                 rm -f "$(random_file $SCRATCH_MNT/src/padding)"
  98                 rm -f "$(random_file $SCRATCH_MNT/src/padding)"
  99                 touch "$(random_file $SCRATCH_MNT/src/padding)"
 100                 touch "$SCRATCH_MNT/src/padding/random_$RANDOM"
 101
 102                 i=$(($i + 1))
 103                 sleep 1
 104         done
 105 }
 106
 107 delete_workload()
 108 {
 109         trap "wait; exit" SIGTERM
 110
 111         while true; do
 112                 sleep 2
 113                 $BTRFS_UTIL_PROG subvolume delete \
 114                         "$(random_file $SCRATCH_MNT/snapshots)" \
 115                         > /dev/null 2>&1
 116         done
 117 }
 118
 119 # Replay and check each fua/flush (specified by $2) point.
 120 #
 121 # Since dm-log-writes records bio sequentially, even just replaying a range
 122 # still needs to iterate all records before the end point.
 123 # When number of records grows, it will be unacceptably slow, thus we need
 124 # to use relay-log itself to trigger fsck, avoid unnecessary seek.
 125 log_writes_fast_replay_check()
 126 {
 127         local check_point=$1
 128         local blkdev=$2
 129         local fsck_command="$BTRFS_UTIL_PROG check $blkdev"
 130         local ret
 131
 132         [ -z "$check_point" -o -z "$blkdev" ] && _fail \
 133         "check_point and blkdev must be specified for log_writes_fast_replay_check"
 134
 135         $here/src/log-writes/replay-log --log $LOGWRITES_DEV \
 136                 --replay $blkdev --check $check_point --fsck "$fsck_command" \
 137                 &> $tmp.full_fsck
 138         ret=$?
 139         tail -n 150 $tmp.full_fsck > $seqres.full
 140         [ $ret -ne 0 ] && _fail "fsck failed during replay"
 141 }
 142
 143 xattr_value=$(printf '%0.sX' $(seq 1 3800))
 144
 145 # Bumping tree height to level 2.
 146 for ((i = 0; i < 64; i++)); do
 147         touch "$SCRATCH_MNT/src/padding/$i"
 148         $SETFATTR_PROG -n 'user.x1' -v $xattr_value "$SCRATCH_MNT/src/padding/$i"
 149 done
 150
 151 _log_writes_mark prepare
 152
 153 snapshot_workload &
 154 pid1=$!
 155 delete_workload &
 156 pid2=$!
 157
 158 "$FSSTRESS_PROG" $fsstress_args > /dev/null &
 159 sleep $runtime
 160
 161 "$KILLALL_PROG" -q "$FSSTRESS_PROG" &> /dev/null
 162 kill $pid1 &> /dev/null
 163 kill $pid2 &> /dev/null
 164 wait
 165 _log_writes_unmount
 166 _log_writes_remove
 167
 168 log_writes_fast_replay_check fua "$SCRATCH_DEV"
 169
 170 echo "Silence is golden"
 171
 172 # success, all done
 173 status=0
 174 exit