Simple test case which preps a filesystem, then corrupts the FST and finally repairs it. Tests both extent based and bitmap based FSTs.
Signed-off-by: Nikolay Borisov <[email protected]> --- tests/fsck-tests/036-freespacetree-repair/test.sh | 76 +++++++++++++++++++++++ 1 file changed, 76 insertions(+) create mode 100755 tests/fsck-tests/036-freespacetree-repair/test.sh diff --git a/tests/fsck-tests/036-freespacetree-repair/test.sh b/tests/fsck-tests/036-freespacetree-repair/test.sh new file mode 100755 index 000000000000..8c91ce9dedbc --- /dev/null +++ b/tests/fsck-tests/036-freespacetree-repair/test.sh @@ -0,0 +1,76 @@ +#!/bin/bash +# Corrupt a filesystem that is using freespace tree and then ensure that +# btrfs check is able to repair it. This tests correct detection/repair of +# both a FREE_SPACE_EXTENT based FST and a FREE_SPACE_BITMAP based FST. + +source "$TEST_TOP/common" + +# wrapper for btrfs-corrupt-item +# $1: Type of item we want to corrupt - extent or bitmap +corrupt_fst_item() +{ + local type + local objectid + local offset + type="$1" + + if [[ $type == "bitmap" ]]; then + type=200 + objectid=$("$TOP/btrfs" inspect-internal dump-tree -t 10 "$TEST_DEV" | \ + grep -o "[[:digit:]]* FREE_SPACE_BITMAP [[:digit:]]*" | \ + cut -d' ' -f1 | tail -2 | head -1) + offset=$("$TOP/btrfs" inspect-internal dump-tree -t 10 "$TEST_DEV" | \ + grep -o "[[:digit:]]* FREE_SPACE_BITMAP [[:digit:]]*" | \ + cut -d' ' -f3 |tail -2 | head -1) + echo "Corrupting $objectid,FREE_SPACE_BITMAP,$offset" >> "$RESULTS" + elif [[ $type == "extent" ]]; then + type=199 + objectid=$("$TOP/btrfs" inspect-internal dump-tree -t 10 "$TEST_DEV" | \ + grep -o "[[:digit:]]* FREE_SPACE_EXTENT [[:digit:]]*" | \ + cut -d' ' -f1 | tail -2 | head -1) + offset=$("$TOP/btrfs" inspect-internal dump-tree -t 10 "$TEST_DEV" | \ + grep -o "[[:digit:]]* FREE_SPACE_EXTENT [[:digit:]]*" | \ + cut -d' ' -f3 | tail -2 | head -1) + echo "Corrupting $objectid,FREE_SPACE_EXTENT,$offset" >> "$RESULTS" + else + _fail "Unknown item type for corruption" + fi + + run_check "$TOP/btrfs-corrupt-block" -r 10 -K "$objectid,$type,$offset" \ + -f offset "$TEST_DEV" +} + +check_prereq btrfs +check_prereq mkfs.btrfs +check_global_prereq grep +check_global_prereq tail +check_global_prereq head +check_global_prereq cut + +setup_root_helper +prepare_test_dev 256M + +run_check "$TOP/mkfs.btrfs" -n 4k -f "$TEST_DEV" +run_check_mount_test_dev -oclear_cache,space_cache=v2 + +#create files which will populate the FST +for i in {1..3000}; do + fallocate -l 4k "$TEST_MNT/file.$i" +done + +run_check_umount_test_dev + +#now corrupt one of the bitmap items +corrupt_fst_item "bitmap" +check_image "$TEST_DEV" + +# change the freespace such that we now have at least one free_space_extent +# object +run_check_mount_test_dev +rm -rf "$TEST_MNT/file.*" +fallocate -l 50m "$TEST_MNT/file" +run_check_umount_test_dev + +#now corrupt an extent +corrupt_fst_item "extent" +check_image "$TEST_DEV" -- 2.7.4
