From: Johannes Thumshirn <johannes.thumshirn@xxxxxxx> Recently we had a bug report about a kernel crash that happened when the user was converting a filesystem to use RAID1 for metadata, but for some reason the device's write pointers got out of sync. Test this scenario by manually injecting de-synchronized write pointer positions and then running conversion to a metadata RAID1 filesystem. In the testcase also repair the broken filesystem and check if both system and metadata block groups are back to the default 'DUP' profile afterwards. Link: https://lore.kernel.org/linux-btrfs/CAB_b4sBhDe3tscz=duVyhc9hNE+gu=B8CrgLO152uMyanR8BEA@xxxxxxxxxxxxxx/ Signed-off-by: Johannes Thumshirn <johannes.thumshirn@xxxxxxx> --- tests/btrfs/329 | 61 +++++++++++++++++++++++++++++++++++++++++++++ tests/btrfs/329.out | 3 +++ 2 files changed, 64 insertions(+) create mode 100755 tests/btrfs/329 create mode 100644 tests/btrfs/329.out diff --git a/tests/btrfs/329 b/tests/btrfs/329 new file mode 100755 index 000000000000..441be133e230 --- /dev/null +++ b/tests/btrfs/329 @@ -0,0 +1,61 @@ +#! /bin/bash +# SPDX-License-Identifier: GPL-2.0 +# Copyright (c) 2025 Western Digital Corporation. All Rights Reserved. +# +# FS QA Test 329 +# +# what am I here for? +# +. ./common/preamble +_begin_fstest zone quick volume + +. ./common/filter + +_fixed_by_kernel_commit XXXXXXXXXXXX \ + "btrfs: zoned: return EIO on RAID1 block group write pointer mismatch" + +_require_scratch_dev_pool 2 +declare -a devs="( $SCRATCH_DEV_POOL )" +_require_zoned_device ${devs[0]} +_require_zoned_device ${devs[1]} +_require_command "$BLKZONE_PROG" blkzone + +_scratch_mkfs >> $seqres.full 2>&1 +_scratch_mount + +# Write some data to the FS to dirty it +dd if=/dev/zero of=$SCRATCH_MNT/test bs=128k count=1024 >> $seqres.full 2>&1 + +# Add device two to the FS +$BTRFS_UTIL_PROG device add ${devs[1]} $SCRATCH_MNT >> $seqres.full 2>&1 + +# Move write pointers of all empty zones by 4k to simulate write pointer +# mismatch. +# 'blkzone report' reports the zone numbers in sectors so we need to convert +# it to bytes first. Afterwards we need to convert it to 4k blocks for dd. +zones=$($BLKZONE_PROG report ${devs[1]} | $AWK_PROG '/em/ { print $2 }' |\ + sed 's/,//') +for zone in $zones; +do + zone=$(($zone / 8)) + dd if=/dev/zero of=${devs[1]} seek=$zone bs=4k oflag=direct \ + count=1 >> $seqres.full 2>&1 +done + +# expected to fail +$BTRFS_UTIL_PROG balance start -mconvert=raid1 $SCRATCH_MNT \ + >> $seqres.full 2>&1 + +_scratch_unmount + +$MOUNT_PROG -t btrfs -odegraded ${devs[0]} $SCRATCH_MNT + +$BTRFS_UTIL_PROG device remove --force missing $SCRATCH_MNT >> $seqres.full 2>&1 +$BTRFS_UTIL_PROG balance start --full-balance $SCRATCH_MNT >> $seqres.full 2>&1 + +# Check that both System and Metadata are back to the DUP profile +$BTRFS_UTIL_PROG filesystem df /mnt/scratch/ |\ + grep -o -e "System, DUP" -e "Metadata, DUP" + +status=0 +exit diff --git a/tests/btrfs/329.out b/tests/btrfs/329.out new file mode 100644 index 000000000000..eab11130981d --- /dev/null +++ b/tests/btrfs/329.out @@ -0,0 +1,3 @@ +QA output created by 329 +System, DUP +Metadata, DUP -- 2.43.0
