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@xxxxxxxx>
---
tests/fsck-tests/035-freespacetree-repair/test.sh | 79 +++++++++++++++++++++++
1 file changed, 79 insertions(+)
create mode 100755 tests/fsck-tests/035-freespacetree-repair/test.sh
diff --git a/tests/fsck-tests/035-freespacetree-repair/test.sh b/tests/fsck-tests/035-freespacetree-repair/test.sh
new file mode 100755
index 000000000000..e19d997b3d6a
--- /dev/null
+++ b/tests/fsck-tests/035-freespacetree-repair/test.sh
@@ -0,0 +1,79 @@
+#!/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"
+
+repair_and_verify()
+{
+ # since repairing entails allocating a block, which in turn implies
+ # FST modification another btrfs check is required to ensure that
+ # FST modification logic is correct.
+ run_check $SUDO_HELPER "$TOP/btrfs" check --repair "$TEST_DEV"
+ run_check $SUDO_HELPER "$TOP/btrfs" check "$TEST_DEV"
+}
+
+# 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"
+ 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"
+ 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"
+
+#now corrupt an extent
+corrupt_fst_item "extent"
+check_image "$TEST_DEV"
--
2.7.4
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