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author | Nikolay Borisov <nborisov@suse.com> | 2018-10-01 17:46:20 +0300 |
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committer | David Sterba <dsterba@suse.com> | 2018-10-25 16:11:40 +0200 |
commit | 1cf5833aa671f935eb3372e13c4eb039ee81d53e (patch) | |
tree | 12f6119a7646efa8f32dff774092d45efc49a895 | |
parent | be32eb0557f3d797c0ad073e18df633c73a10755 (diff) |
btrfs-progs: tests: Test for FST corruption detection/repair
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 <nborisov@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
-rwxr-xr-x | tests/fsck-tests/037-freespacetree-repair/test.sh | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/tests/fsck-tests/037-freespacetree-repair/test.sh b/tests/fsck-tests/037-freespacetree-repair/test.sh new file mode 100755 index 00000000..c38a4c85 --- /dev/null +++ b/tests/fsck-tests/037-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" + +setup_root_helper +prepare_test_dev 256M + +check_prereq btrfs +check_prereq mkfs.btrfs +check_global_prereq grep +check_global_prereq tail +check_global_prereq head +check_global_prereq cut + +# 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" +} + +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 + run_check $SUDO_HELPER fallocate -l 4k "$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.*" +run_check $SUDO_HELPER fallocate -l 50m "$TEST_MNT/file" +run_check_umount_test_dev + +# now corrupt an extent +corrupt_fst_item "extent" +check_image "$TEST_DEV" |