diff options
author | Nikolay Borisov <nborisov@suse.com> | 2017-12-05 10:39:48 +0200 |
---|---|---|
committer | David Sterba <dsterba@suse.com> | 2018-01-31 15:14:01 +0100 |
commit | e764625f90f947f927f78b4166a34d9d5755ef63 (patch) | |
tree | 410aedc2924b49661af04723861b878c27e8712d | |
parent | 4487aa64e73ab0f029290b67f3d619858ad516bb (diff) |
btrfs-progs: tests: Add test for super block recovery
This functionality regressed some time ago and it was never caught. Seems no
one complained of that, but to be sure add a regression test to prevent future
regressions.
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
-rwxr-xr-x | tests/fsck-tests/029-superblock-recovery/test.sh | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/tests/fsck-tests/029-superblock-recovery/test.sh b/tests/fsck-tests/029-superblock-recovery/test.sh new file mode 100755 index 00000000..c1dfe7f5 --- /dev/null +++ b/tests/fsck-tests/029-superblock-recovery/test.sh @@ -0,0 +1,64 @@ +#!/bin/bash +# Test that any superblock is correctly detected +# and fixed by btrfs rescue + +source "$TOP/tests/common" + +check_prereq btrfs +check_prereq mkfs.btrfs +check_prereq btrfs-select-super + +setup_root_helper + +rm -f dev1 +run_check truncate -s 260G dev1 +loop=$(run_check_stdout $SUDO_HELPER losetup --find --show dev1) + +# Create the test file system. +run_check $SUDO_HELPER "$TOP"/mkfs.btrfs -f "$loop" + +function check_corruption { + local sb_offset=$1 + local source_sb=$2 + + + # First we ensure we can mount it successfully + run_check $SUDO_HELPER mount $loop "$TEST_MNT" + run_check $SUDO_HELPER umount "$TEST_MNT" + + # Now corrupt 1k of the superblock at sb_offset + run_check $SUDO_HELPER dd bs=1K count=1 seek=$(($sb_offset + 1)) if=/dev/zero of="$loop" + + #if corrupting one of the sb copies, copy it over the initial superblock + if [ ! -z $source_sb ]; then + local shift_val=$((16 << $source_sb * 12 )) + run_check $SUDO_HELPER dd bs=1K count=4 seek=64 skip=$shift_val if="$loop" of="$loop" + fi + + run_mustfail "Mounted fs with corrupted superblock" \ + $SUDO_HELPER mount $loop "$TEST_MNT" + + # Now run btrfs rescue which should fix the superblock. It uses 2 + # to signal success of recovery use mayfail to ignore that retval + # but still log the output of the command + run_mayfail $SUDO_HELPER "$TOP"/btrfs rescue super-recover -yv "$loop" + if [ $? != 2 ]; then + _fail "couldn't rescue super" + fi + + run_check $SUDO_HELPER mount $loop "$TEST_MNT" + run_check $SUDO_HELPER umount "$TEST_MNT" +} + +_log "Corrupting first superblock" +check_corruption 64 + +_log "Corrupting second superblock" +check_corruption 65536 1 + +_log "Corrupting third superblock" +check_corruption 268435456 2 + +# Cleanup +run_check $SUDO_HELPER losetup -d "$loop" +rm -f dev1 |