| #! /bin/bash |
| # 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 |
| # |
| #----------------------------------------------------------------------- |
| # Copyright (c) 2013 HuaWei. All Rights Reserved. |
| # |
| # This program is free software; you can redistribute it and/or |
| # modify it under the terms of the GNU General Public License as |
| # published by the Free Software Foundation. |
| # |
| # This program is distributed in the hope that it would be useful, |
| # but WITHOUT ANY WARRANTY; without even the implied warranty of |
| # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| # GNU General Public License for more details. |
| # |
| # You should have received a copy of the GNU General Public License |
| # along with this program; if not, write the Free Software Foundation, |
| # Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| #----------------------------------------------------------------------- |
| # |
| |
| seq=`basename $0` |
| seqres=$RESULT_DIR/$seq |
| echo "QA output created by $seq" |
| |
| status=1 # failure is the default! |
| |
| _cleanup() |
| { |
| rm -rf $TEST_DIR/tmp |
| } |
| trap "_cleanup; exit \$status" 0 1 2 3 15 |
| |
| # get standard environment, filters and checks |
| . ./common/rc |
| . ./common/filter |
| |
| # real QA test starts here |
| _supported_fs generic |
| _supported_os Linux |
| _require_test |
| _require_command "$KILLALL_PROG" killall |
| |
| dmesg -c > /dev/null |
| |
| nr_bug=`dmesg | grep -c "kernel BUG"` |
| nr_error=`dmesg | grep -c "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 -c "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() |
| { |
| 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() |
| { |
| 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 |