The new test case will verify that btrfs can handle one corrupted device
without affecting the consistency of the filesystem.
Unlike a missing device, one corrupted device can return garbage to the fs,
thus btrfs has to utilize its data/metadata checksum to verify which
data is correct.
The test case will:
- Create a small fs
Mostly to speedup the test
- Fill the fs with a regular file
- Use fsstress to create some contents
- Save the fssum for later verification
- Corrupt one device with garbage but keep the primary superblock
untouched
- Run fssum verification
- Run scrub to fix the fs
- Run scrub again to make sure the fs is fine
Signed-off-by: Qu Wenruo <wqu@xxxxxxxx>
Reviewed-by: Boris Burkov <boris@xxxxxx>
---
Changelog:
v2:
- Use _btrfs_get_profile_configs() helper to grab the mkfs options
- Use fixed number of devices 4 to co-operate with above change
- Remove a not-so-helpful debug output into $seqres.full
- Add to group auto and volume
- Use $SCRATCH_DEV as the first device and target to corrupt
---
tests/btrfs/261 | 90 +++++++++++++++++++++++++++++++++++++++++++++
tests/btrfs/261.out | 2 +
2 files changed, 92 insertions(+)
create mode 100755 tests/btrfs/261
create mode 100644 tests/btrfs/261.out
diff --git a/tests/btrfs/261 b/tests/btrfs/261
new file mode 100755
index 00000000..8861ae99
--- /dev/null
+++ b/tests/btrfs/261
@@ -0,0 +1,90 @@
+#! /bin/bash
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (C) 2022 SUSE Linux Products GmbH. All Rights Reserved.
+#
+# FS QA Test 261
+#
+# Make sure btrfs raid profiles can handling one corrupted device
+# without affecting the consistency of the fs.
+#
+. ./common/preamble
+_begin_fstest auto volume raid
+
+. ./common/filter
+. ./common/populate
+
+_supported_fs btrfs
+_require_scratch_dev_pool 4
+_btrfs_get_profile_configs replace-missing
+_require_fssum
+
+prepare_fs()
+{
+ local mkfs_opts=$1
+
+ # We don't want too large fs which can take too long to populate
+ # And the extra redirection of stderr is to avoid the RAID56 warning
+ # message to polluate the golden output
+ _scratch_pool_mkfs $mkfs_opts -b 1G >> $seqres.full 2>&1
+ if [ $? -ne 0 ]; then
+ _fail "mkfs $mkfs_opts failed"
+ fi
+
+ # Disable compression, as compressed read repair is known to have problems
+ _scratch_mount -o compress=no
+
+ # Fill some part of the fs first
+ $XFS_IO_PROG -f -c "pwrite -S 0xfe 0 400M" $SCRATCH_MNT/garbage > /dev/null 2>&1
+
+ # Then use fsstress to generate some extra contents.
+ # Disable setattr related operations, as it may set NODATACOW which will
+ # not allow us to use btrfs checksum to verify the content.
+ $FSSTRESS_PROG -f setattr=0 -d $SCRATCH_MNT -w -n 3000 > /dev/null 2>&1
+ sync
+
+ # Save the fssum of this fs
+ $FSSUM_PROG -A -f -w $tmp.saved_fssum $SCRATCH_MNT
+ _scratch_unmount
+}
+
+workload()
+{
+ local mkfs_opts=$1
+ local num_devs=$2
+
+ _scratch_dev_pool_get 4
+ echo "=== Testing profile $mkfs_opts ===" >> $seqres.full
+ rm -f -- $tmp.saved_fssum
+ prepare_fs "$mkfs_opts"
+
+ # $SCRATCH_DEV is always the first device of dev pool.
+ # Corrupt the disk but keep the primary superblock.
+ $XFS_IO_PROG -c "pwrite 1M 1023M" $SCRATCH_DEV > /dev/null 2>&1
+
+ _scratch_mount
+
+ # All content should be fine
+ $FSSUM_PROG -r $tmp.saved_fssum $SCRATCH_MNT > /dev/null
+
+ # Scrub to fix the fs, this is known to report various correctable
+ # errors
+ $BTRFS_UTIL_PROG scrub start -B $SCRATCH_MNT >> $seqres.full 2>&1
+
+ # Make sure above scrub fixed the fs
+ $BTRFS_UTIL_PROG scrub start -Br $SCRATCH_MNT >> $seqres.full
+ if [ $? -ne 0 ]; then
+ echo "scrub failed to fix the fs for profile $mkfs_opts"
+ fi
+ _scratch_unmount
+ _scratch_dev_pool_put
+}
+
+for t in "${_btrfs_profile_configs[@]}"; do
+ workload "$t"
+done
+
+echo "Silence is golden"
+
+# success, all done
+status=0
+exit
diff --git a/tests/btrfs/261.out b/tests/btrfs/261.out
new file mode 100644
index 00000000..679ddc0f
--- /dev/null
+++ b/tests/btrfs/261.out
@@ -0,0 +1,2 @@
+QA output created by 261
+Silence is golden
--
2.36.1
