blob: d0ac51e47126745616d7c74f373c2b01524671a8 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
|
#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2016 Fujitsu. All Rights Reserved.
#
# FS QA Test 132
#
# Check if false ENOSPC will happen when parallel buffer write happens
# The problem is caused by incorrect metadata reservation for any buffered
# write whose max extent size is not 128M (including compression and in-band
# dedupe).
#
. ./common/preamble
_begin_fstest auto enospc
# Override the default cleanup function.
_cleanup()
{
cd /
rm -f $tmp.*
kill $pids &> /dev/null
wait
}
. ./common/filter
_supported_fs btrfs
_require_scratch
# Use small filesystem to trigger the bug more easily
# It's highly recommened to run this test case with MKFS_OPTIONS="-n 64k"
# to further increase the possibility
# Since the false ENOSPC happens due to incorrect metadata reservation,
# larger nodesize and small fs will make it much easier to reproduce
_scratch_mkfs_sized $((512 * 1024 * 1024)) >> $seqres.full 2>&1
# Recommended to use MOUNT_OPTIONS="-o compress" to trigger the bug
_scratch_mount
sleep_time=$(($TIME_FACTOR * 30))
loop_writer()
{
offset=$1
len=$2
file=$3
while true; do
# Only need stderr, and we need to specify small block size
# but still large enough trigger compression
$XFS_IO_PROG -c "pwrite -b 8K $offset $len" $file > /dev/null
done
}
touch $SCRATCH_MNT/testfile
# Start 2 writter writting into the same file
# The file is 142M, which is smaller than 1/2 of the filesystem,
# so no other cause can lead to ENOSPC.
loop_writer 0 128M $SCRATCH_MNT/testfile &
pids=$!
loop_writer 128M 16M $SCRATCH_MNT/testfile &
pids="$pids $!"
sleep $sleep_time
kill $pids
wait
# Wait all writers really exits
while pgrep -f "$SCRATCH_MNT" > /dev/null; do
sleep 1
done
echo "Silence is golden"
status=0
exit
|
