3 source $TOP/tests/common
5 check_prereq btrfs-debug-tree
6 check_prereq mkfs.btrfs
9 if [ -z $TEST_DEV ]; then
10 echo "\$TEST_DEV not given, use $TOP/test/test.img as fallback" >> \
12 TEST_DEV="$TOP/tests/test.img"
14 # Need at least 1G to avoid mixed block group, which extent tree
15 # rebuild doesn't support.
16 run_check truncate -s 1G $TEST_DEV
19 if [ -z $TEST_MNT ];then
20 echo " [NOTRUN] extent tree rebuild, need TEST_MNT variant"
24 # test whether fsck can rebuild a corrupted extent tree
25 test_extent_tree_rebuild()
27 run_check $SUDO_HELPER $TOP/mkfs.btrfs -f $TEST_DEV
29 run_check $SUDO_HELPER mount $TEST_DEV $TEST_MNT
30 run_check $SUDO_HELPER cp -aR /lib/modules/`uname -r`/ $TEST_MNT
32 for i in `seq 1 100`;do
33 run_check $SUDO_HELPER $TOP/btrfs sub snapshot $TEST_MNT \
34 $TEST_MNT/snapaaaaaaa_$i
36 run_check $SUDO_HELPER umount $TEST_DEV
38 # get extent root bytenr
39 extent_root_bytenr=`$SUDO_HELPER $TOP/btrfs-debug-tree -r $TEST_DEV | \
40 grep extent | awk '{print $7}'`
41 if [ -z $extent_root_bytenr ];then
42 _fail "fail to get extent root bytenr"
45 # corrupt extent root node block
46 run_check $SUDO_HELPER $TOP/btrfs-corrupt-block -l $extent_root_bytenr \
49 $SUDO_HELPER $TOP/btrfs check $TEST_DEV >& /dev/null && \
50 _fail "btrfs check should detect failure"
51 run_check $SUDO_HELPER $TOP/btrfs check --init-extent-tree $TEST_DEV
52 run_check $SUDO_HELPER $TOP/btrfs check $TEST_DEV
55 test_extent_tree_rebuild