Re: [PATCH 2/2] xfs: Check if rt summary/bitmap buffers are logged with correct xfs_buf type

Chandan Babu R
2020-09-17T04:33:12Z

On Thursday 17 September 2020 9:58:44 AM IST Chandan Babu R wrote:
> This commit adds a test to check if growing a real-time device can end
> up logging an xfs_buf with the "type" subfield of
> bip->bli_formats->blf_flags set to XFS_BLFT_UNKNOWN_BUF. When this
> occurs the following call trace is printed on the console,
>
> XFS: Assertion failed: (bip->bli_flags & XFS_BLI_STALE) || (xfs_blft_from_flags(&bip->__bli_format) > XFS_BLFT_UNKNOWN_BUF && xfs_blft_from_flags(&bip->__bli_format) < XFS_BLFT_MAX_BUF), file: fs/xfs/xfs_buf_item.c, line: 331
> Call Trace:
> xfs_buf_item_format+0x632/0x680
> ? kmem_alloc_large+0x29/0x90
> ? kmem_alloc+0x70/0x120
> ? xfs_log_commit_cil+0x132/0x940
> xfs_log_commit_cil+0x26f/0x940
> ? xfs_buf_item_init+0x1ad/0x240
> ? xfs_growfs_rt_alloc+0x1fc/0x280
> __xfs_trans_commit+0xac/0x370
> xfs_growfs_rt_alloc+0x1fc/0x280
> xfs_growfs_rt+0x1a0/0x5e0
> xfs_file_ioctl+0x3fd/0xc70
> ? selinux_file_ioctl+0x174/0x220
> ksys_ioctl+0x87/0xc0
> __x64_sys_ioctl+0x16/0x20
> do_syscall_64+0x3e/0x70
> entry_SYSCALL_64_after_hwframe+0x44/0xa9
>
> The kernel patch "xfs: Set xfs_buf type flag when growing summary/bitmap
> files" is required to fix this issue.
>
> Reviewed-by: Zorro Lang <zlang@redhat.com>
> Signed-off-by: Chandan Babu R <chandanrlinux@gmail.com>
> ---

Sorry, I forgot to add version number and also a changelog.

V2 -> V3:
1. Remove unnecessary invocation of _scratch_unmount at the end of the test.

> tests/xfs/260 | 51 +++++++++++++++++++++++++++++++++++++++++++++++
> tests/xfs/260.out | 2 ++
> tests/xfs/group | 1 +
> 3 files changed, 54 insertions(+)
> create mode 100755 tests/xfs/260
> create mode 100644 tests/xfs/260.out
>
> diff --git a/tests/xfs/260 b/tests/xfs/260
> new file mode 100755
> index 00000000..1cafa368
> --- /dev/null
> +++ b/tests/xfs/260
> @@ -0,0 +1,51 @@
> +#! /bin/bash
> +# SPDX-License-Identifier: GPL-2.0
> +# Copyright (c) 2020 Chandan Babu R. All Rights Reserved.
> +#
> +# FS QA Test 260
> +#
> +# Test to check if growing a real-time device can end up logging an xfs_buf with
> +# the "type" subfield of bip->bli_formats->blf_flags set to
> +# XFS_BLFT_UNKNOWN_BUF.
> +#
> +# This is a regression test for the kernel patch "xfs: Set xfs_buf type flag
> +# when growing summary/bitmap files".
> +
> +seq=`basename $0`
> +seqres=$RESULT_DIR/$seq
> +echo "QA output created by $seq"
> +
> +here=`pwd`
> +tmp=/tmp/$$
> +status=1 # failure is the default!
> +trap "_cleanup; exit \$status" 0 1 2 3 15
> +
> +_cleanup()
> +{
> + cd /
> + rm -f $tmp.*
> +}
> +
> +# get standard environment, filters and checks
> +. ./common/rc
> +. ./common/filter
> +
> +# remove previous $seqres.full before test
> +rm -f $seqres.full
> +
> +# real QA test starts here
> +_supported_fs xfs
> +_supported_os Linux
> +_require_realtime
> +
> +_scratch_mkfs -r size=10M >> $seqres.full
> +
> +_scratch_mount >> $seqres.full
> +
> +$XFS_GROWFS_PROG $SCRATCH_MNT >> $seqres.full
> +
> +echo "Silence is golden"
> +
> +# success, all done
> +status=0
> +exit
> diff --git a/tests/xfs/260.out b/tests/xfs/260.out
> new file mode 100644
> index 00000000..18ca517c
> --- /dev/null
> +++ b/tests/xfs/260.out
> @@ -0,0 +1,2 @@
> +QA output created by 260
> +Silence is golden
> diff --git a/tests/xfs/group b/tests/xfs/group
> index b99ca082..d6d4425d 100644
> --- a/tests/xfs/group
> +++ b/tests/xfs/group
> @@ -257,6 +257,7 @@
> 257 auto quick clone
> 258 auto quick clone
> 259 auto quick
> +260 auto quick growfs realtime
> 261 auto quick quota
> 262 dangerous_fuzzers dangerous_scrub dangerous_online_repair
> 263 auto quick quota
>

--
chandan