blob: d5e3afbfdc75f370cf4b28ef9aab65548ab32cda (
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
|
#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2016 Red Hat, Inc. All Rights Reserved.
#
# FS QA Test No. 311
#
# Test to reproduce an XFS unmount crash due to races with directory readahead.
# XFS had a bug in which unmount would proceed with a readahead I/O in flight.
# If the unmount deconstructed the log by the time I/O completion occurs,
# certain metadata read verifier checks could access invalid memory and cause a
# panic.
#
. ./common/preamble
_begin_fstest auto quick
# Override the default cleanup function.
_cleanup()
{
cd /
rm -f $tmp.*
_scratch_unmount > /dev/null 2>&1
_cleanup_delay > /dev/null 2>&1
}
# Import common functions.
. ./common/dmdelay
# Modify as appropriate.
_supported_fs xfs
_require_scratch
_require_dm_target delay
echo "Silence is golden."
_scratch_mkfs_xfs >> $seqres.full 2>&1
_init_delay
_mount_delay
# insert entries to grow the directory to at least one extent, which is what
# triggers readahead on dir open
mkdir $SCRATCH_MNT/dir
for i in $(seq 0 999); do
echo > $SCRATCH_MNT/dir/$i
done
# remount to clear the buffer cache
_unmount_delay
_mount_delay
# introduce a read I/O delay
_load_delay_table $DELAY_READ
# Map the directory and immediately unmount. This should invoke an asynchronous
# readahead on the first block of the directory. The readahead is delayed by
# dm-delay. If the unmount doesn't properly wait for the readahead completion,
# the read verifier can run after core data structures have been freed and lead
# to a crash/panic.
$XFS_IO_PROG -c "bmap -v" $SCRATCH_MNT/dir >> $seqres.full 2>&1
_unmount_delay
_cleanup_delay
# success, all done
status=0
exit
|
