diff --git a/tests/misc-tests/038-backup-root-corruption/test.sh b/tests/misc-tests/038-backup-root-corruption/test.sh new file mode 100755 index 00000000..f15d0bba --- /dev/null +++ b/tests/misc-tests/038-backup-root-corruption/test.sh @@ -0,0 +1,45 @@ +#!/bin/bash +# Test that a corrupted filesystem will correctly handle writing of backup root + +source "$TEST_TOP/common" + +check_prereq mkfs.btrfs +check_prereq btrfs +check_prereq btrfs-corrupt-block + +setup_root_helper +prepare_test_dev + +# Create a file and unmount to commit some backup roots +run_check_mkfs_test_dev +run_check_mount_test_dev +run_check $SUDO_HELPER touch "$TEST_MNT/file" +run_check_umount_test_dev + +dump_super() { + run_check_stdout $SUDO_HELPER "$TOP/btrfs" inspect-internal dump-super -f "$TEST_DEV" +} + +# Ensure currently active backup slot is the expected one (slot 3) +backup2_root_ptr=$(dump_super | grep -A1 "backup 2" | grep backup_tree_root | awk '{print $2}') + +main_root_ptr=$(dump_super | grep root | head -n1 | awk '{print $2}') + +[ "$backup2_root_ptr" -eq "$main_root_ptr" ] || _fail "Backup slot 2 is not in use" + +run_check "$TOP/btrfs-corrupt-block" -m $main_root_ptr -f generation "$TEST_DEV" + +# Should fail because the root is corrupted +run_mustfail "Unexpected successful mount" \ + $SUDO_HELPER mount "$TEST_DEV" "$TEST_MNT" + +# Cycle mount with the backup to force rewrite of slot 3 +run_check_mount_test_dev -o usebackuproot +run_check_umount_test_dev + +# Since we've used backup 1 as the usable root, then backup 2 should have been +# overwritten +main_root_ptr=$(dump_super | grep root | head -n1 | awk '{print $2}') +backup2_new_root_ptr=$(dump_super | grep -A1 "backup 2" | grep backup_tree_root | awk '{print $2}') + +[ "$backup2_root_ptr" -ne "$backup2_new_root_ptr" ] || _fail "Backup 2 not overwritten"