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#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2013 HuaWei. All Rights Reserved.
#
# FS QA Test No. 310
#
# Check if there are two threads,one keeps calling read() or lseek(), and
# the other calling readdir(), both on the same directory fd.
#
# Testing on ext3: with dir_index disabled results in the following
# dmesg output: (also occurs when testing ext2 and ext4)
#
# EXT3-fs error (device sdb): ext3_readdir: bad entry in directory #1134241:
# rec_len % 4 != 0 - offset=2704, inode=16973836, rec_len=12850, name_len=52
# EXT3-fs error (device sdb): ext3_readdir: bad entry in directory #1134241:
# directory entry across blocks - offset=1672, inode=16973836, rec_len=14132,
# name_len=57
#
# The filesystem mount option 'errors=' will define the behavior
# when an error is encountered. (see mount manpage)
#
# The test is based on a testcase from Li Zefan <lizefan@huawei.com>.
#
# http://marc.info/?l=linux-kernel&m=136123703211869&w=2
#
. ./common/preamble
_begin_fstest auto
# Override the default cleanup function.
_cleanup()
{
rm -rf $TEST_DIR/tmp
}
# Import common functions.
. ./common/filter
# real QA test starts here
_supported_fs generic
_require_test
_require_command "$KILLALL_PROG" killall
dmesg -c > /dev/null
nr_bug=`dmesg | grep -c "kernel BUG"`
nr_error=`dmesg | grep -wc "error"`
nr_null=`dmesg | grep -c "kernel NULL pointer dereference"`
nr_warning=`dmesg | grep -c "^WARNING"`
nr_lockdep=`dmesg | grep -c "possible recursive locking detected"`
#check if some kind of kernel bug happened
check_kernel_bug()
{
new_bug=`dmesg | grep -c "kernel BUG"`
new_error=`dmesg | grep -wc "error"`
new_null=`dmesg | grep -c "kernel NULL pointer dereference"`
new_warning=`dmesg | grep -c "^WARNING"`
new_lockdep=`dmesg | grep -c "possible recursive locking detected"`
# no kernel bug is detected
if [ $new_bug -eq $nr_bug -a $new_error -eq $nr_error -a \
$new_null -eq $nr_null -a $new_warning -eq $nr_warning -a \
$new_lockdep -eq $nr_lockdep ]; then
return 0
fi
nr_bug=$new_bug
nr_error=$new_error
nr_null=$new_null
nr_warning=$new_warning
nr_lockdep=$new_lockdep
return 1
}
RUN_TIME=$((30 * $TIME_FACTOR))
SEQ_DIR=$TEST_DIR/$seq
mkdir -p $SEQ_DIR
for n in {1..4096}; do
touch $SEQ_DIR/$n
done
_test_read()
{
$here/src/t_readdir_1 $SEQ_DIR &
sleep $RUN_TIME
$KILLALL_PROG t_readdir_1
check_kernel_bug
if [ $? -ne 0 ]; then
_fatal "kernel bug detected, check dmesg for more infomation."
fi
}
_test_lseek()
{
$here/src/t_readdir_2 $SEQ_DIR &
sleep $RUN_TIME
$KILLALL_PROG t_readdir_2
check_kernel_bug
if [ $? -ne 0 ]; then
_fatal "kernel bug detected, check dmesg for more infomation."
fi
}
_test_read
_test_lseek
# success, all done
echo "*** done"
status=0
exit
|
