2 # SPDX-License-Identifier: GPL-2.0
3 # Copyright (c) 2013 HuaWei. All Rights Reserved.
7 # Check if there are two threads,one keeps calling read() or lseek(), and
8 # the other calling readdir(), both on the same directory fd.
10 # Testing on ext3: with dir_index disabled results in the following
11 # dmesg output: (also occurs when testing ext2 and ext4)
13 # EXT3-fs error (device sdb): ext3_readdir: bad entry in directory #1134241:
14 # rec_len % 4 != 0 - offset=2704, inode=16973836, rec_len=12850, name_len=52
15 # EXT3-fs error (device sdb): ext3_readdir: bad entry in directory #1134241:
16 # directory entry across blocks - offset=1672, inode=16973836, rec_len=14132,
19 # The filesystem mount option 'errors=' will define the behavior
20 # when an error is encountered. (see mount manpage)
22 # The test is based on a testcase from Li Zefan <lizefan@huawei.com>.
24 # http://marc.info/?l=linux-kernel&m=136123703211869&w=2
27 seqres=$RESULT_DIR/$seq
28 echo "QA output created by $seq"
31 status=1 # failure is the default!
37 trap "_cleanup; exit \$status" 0 1 2 3 15
39 # get standard environment, filters and checks
43 # real QA test starts here
46 _require_command "$KILLALL_PROG" killall
50 nr_bug=`dmesg | grep -c "kernel BUG"`
51 nr_error=`dmesg | grep -wc "error"`
52 nr_null=`dmesg | grep -c "kernel NULL pointer dereference"`
53 nr_warning=`dmesg | grep -c "^WARNING"`
54 nr_lockdep=`dmesg | grep -c "possible recursive locking detected"`
56 #check if some kind of kernel bug happened
59 new_bug=`dmesg | grep -c "kernel BUG"`
60 new_error=`dmesg | grep -wc "error"`
61 new_null=`dmesg | grep -c "kernel NULL pointer dereference"`
62 new_warning=`dmesg | grep -c "^WARNING"`
63 new_lockdep=`dmesg | grep -c "possible recursive locking detected"`
65 # no kernel bug is detected
66 if [ $new_bug -eq $nr_bug -a $new_error -eq $nr_error -a \
67 $new_null -eq $nr_null -a $new_warning -eq $nr_warning -a \
68 $new_lockdep -eq $nr_lockdep ]; then
75 nr_warning=$new_warning
76 nr_lockdep=$new_lockdep
80 RUN_TIME=$((30 * $TIME_FACTOR))
82 SEQ_DIR=$TEST_DIR/$seq
84 for n in {1..4096}; do
90 $here/src/t_readdir_1 $SEQ_DIR &
92 $KILLALL_PROG t_readdir_1
95 _fatal "kernel bug detected, check dmesg for more infomation."
101 $here/src/t_readdir_2 $SEQ_DIR &
103 $KILLALL_PROG t_readdir_2
105 if [ $? -ne 0 ]; then
106 _fatal "kernel bug detected, check dmesg for more infomation."