Test enabling/disable quota and creating/destroying qgroup repeatedly in asynchronous and confirm it does not cause kernel hang. This is a regression test for the problem reported to linux-btrfs list [1]. The hang was recreated using the test case and fixed by kernel patch titled btrfs: qgroup: fix deadlock between rescan worker and remove qgroup [1] https://lore.kernel.org/linux-btrfs/20220228014340.21309-1-realwakka@xxxxxxxxx/ Signed-off-by: Sidong Yang <realwakka@xxxxxxxxx> --- tests/btrfs/262 | 54 +++++++++++++++++++++++++++++++++++++++++++++ tests/btrfs/262.out | 2 ++ 2 files changed, 56 insertions(+) create mode 100755 tests/btrfs/262 create mode 100644 tests/btrfs/262.out diff --git a/tests/btrfs/262 b/tests/btrfs/262 new file mode 100755 index 00000000..9be380f9 --- /dev/null +++ b/tests/btrfs/262 @@ -0,0 +1,54 @@ +#! /bin/bash +# SPDX-License-Identifier: GPL-2.0 +# Copyright (c) 2022 YOUR NAME HERE. All Rights Reserved. +# +# FS QA Test 262 +# +# Test the deadlock between qgroup and quota commands +# +. ./common/preamble +_begin_fstest auto qgroup + +# Import common functions. +. ./common/filter + +# real QA test starts here + +# Modify as appropriate. +_supported_fs btrfs + +_require_scratch + +# Run command that enable/disable quota and create/destroy qgroup asynchronously +qgroup_deadlock_test() +{ + _scratch_mkfs > /dev/null 2>&1 + _scratch_mount + echo "=== qgroup deadlock test ===" >> $seqres.full + + pids=() + for ((i = 0; i < 200; i++)); do + $BTRFS_UTIL_PROG quota enable $SCRATCH_MNT 2>> $seqres.full & + pids+=($!) + $BTRFS_UTIL_PROG qgroup create 1/0 $SCRATCH_MNT 2>> $seqres.full & + pids+=($!) + $BTRFS_UTIL_PROG qgroup destroy 1/0 $SCRATCH_MNT 2>> $seqres.full & + pids+=($!) + $BTRFS_UTIL_PROG quota disable $SCRATCH_MNT 2>> $seqres.full & + pids+=($!) + done + + for pid in "${pids[@]}"; do + wait $pid + done + + _scratch_unmount + _check_scratch_fs +} + +qgroup_deadlock_test + +# success, all done +echo "Silence is golden" +status=0 +exit diff --git a/tests/btrfs/262.out b/tests/btrfs/262.out new file mode 100644 index 00000000..404badc3 --- /dev/null +++ b/tests/btrfs/262.out @@ -0,0 +1,2 @@ +QA output created by 262 +Silence is golden -- 2.25.1
