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#!/bin/bash
source "$TOP/tests/common"
check_prereq btrfs-corrupt-block
check_prereq mkfs.btrfs
check_prereq btrfs
setup_root_helper
prepare_test_dev 1G
# test whether fsck can rebuild a corrupted extent tree
test_extent_tree_rebuild()
{
run_check $SUDO_HELPER "$TOP/mkfs.btrfs" -f "$TEST_DEV"
run_check_mount_test_dev
generate_dataset small
for i in `seq 1 100`;do
run_check $SUDO_HELPER "$TOP/btrfs" sub snapshot "$TEST_MNT" \
"$TEST_MNT/snapaaaaaaa_$i"
done
run_check_umount_test_dev
# get extent root bytenr
extent_root_bytenr=`$SUDO_HELPER "$TOP/btrfs" inspect-internal dump-tree -r "$TEST_DEV" | \
grep extent | awk '{print $7}'`
if [ -z "$extent_root_bytenr" ];then
_fail "fail to get extent root bytenr"
fi
# corrupt extent root node block
run_check $SUDO_HELPER "$TOP/btrfs-corrupt-block" -l "$extent_root_bytenr" \
-b 4096 "$TEST_DEV"
$SUDO_HELPER "$TOP/btrfs" check "$TEST_DEV" >& /dev/null && \
_fail "btrfs check should detect failure"
run_check $SUDO_HELPER "$TOP/btrfs" check --repair --init-extent-tree "$TEST_DEV"
run_check $SUDO_HELPER "$TOP/btrfs" check "$TEST_DEV"
}
test_extent_tree_rebuild
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