forked from Mirrors/btrfs-progs
46 lines
1.5 KiB
Bash
46 lines
1.5 KiB
Bash
#!/bin/bash
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# Test that a corrupted filesystem will correctly handle writing of backup root
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source "$TEST_TOP/common"
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check_prereq mkfs.btrfs
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check_prereq btrfs
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check_prereq btrfs-corrupt-block
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setup_root_helper
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prepare_test_dev
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# Create a file and unmount to commit some backup roots
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run_check_mkfs_test_dev
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run_check_mount_test_dev
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run_check $SUDO_HELPER touch "$TEST_MNT/file"
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run_check_umount_test_dev
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dump_super() {
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run_check_stdout $SUDO_HELPER "$TOP/btrfs" inspect-internal dump-super -f "$TEST_DEV"
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}
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# Ensure currently active backup slot is the expected one (slot 3)
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backup2_root_ptr=$(dump_super | grep -A1 "backup 2" | grep backup_tree_root | awk '{print $2}')
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main_root_ptr=$(dump_super | awk '/^root\t/{print $2}')
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[ "$backup2_root_ptr" -eq "$main_root_ptr" ] || _fail "Backup slot 2 is not in use"
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run_check "$TOP/btrfs-corrupt-block" -m $main_root_ptr -f generation "$TEST_DEV"
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# Should fail because the root is corrupted
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run_mustfail "Unexpected successful mount" \
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$SUDO_HELPER mount "$TEST_DEV" "$TEST_MNT"
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# Cycle mount with the backup to force rewrite of slot 3
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run_check_mount_test_dev -o usebackuproot
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run_check_umount_test_dev
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# Since we've used backup 1 as the usable root, then backup 2 should have been
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# overwritten
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main_root_ptr=$(dump_super | grep root | head -n1 | awk '{print $2}')
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backup2_new_root_ptr=$(dump_super | grep -A1 "backup 2" | grep backup_tree_root | awk '{print $2}')
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[ "$backup2_root_ptr" -ne "$backup2_new_root_ptr" ] || _fail "Backup 2 not overwritten"
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