Description Banana 2024-05-11 14:22:37 UTC

[问题描述]：
xfstests测试套ext4-2-overlay执行generic/294测试项FAIL:mount: /fs/nvme1n1p2/ovl-mnt: mount point not mounted or bad option.

[root@iZbp1c9jzchxjqive233ufZ xfstests]# ./check -overlay tests/generic/294
FSTYP         -- overlay
PLATFORM      -- Linux/x86_64 iZbp1c9jzchxjqive233ufZ 6.6.25-2_rc1.an23.x86_64 #1 SMP PREEMPT_DYNAMIC Thu Apr 11 15:05:18 CST 2024
MKFS_OPTIONS  -- /fs/nvme1n1p2
MOUNT_OPTIONS -- -o context=system_u:object_r:root_t:s0 /fs/nvme1n1p2 /fs/nvme1n1p2/ovl-mnt

generic/294 2s ... [failed, exit status 1]- output mismatch (see /root/tone/run/xfstests/results//generic/294.out.bad)
    --- tests/generic/294.out   2024-05-07 14:36:13.788419125 +0800
    +++ /root/tone/run/xfstests/results//generic/294.out.bad    2024-05-11 14:12:53.806406478 +0800
    @@ -1,5 +1,5 @@
     QA output created by 294
    -mknod: SCRATCH_MNT/294.test/testnode: File exists
    -mkdir: cannot create directory 'SCRATCH_MNT/294.test/testdir': File exists
    -touch: cannot touch 'SCRATCH_MNT/294.test/testtarget': Read-only file system
    -ln: creating symbolic link 'SCRATCH_MNT/294.test/testlink': File exists
    +mount: /fs/nvme1n1p2/ovl-mnt: mount point not mounted or bad option.
    +       dmesg(1) may have more information after failed mount system call.
    ...
    (Run 'diff -u /root/tone/run/xfstests/tests/generic/294.out /root/tone/run/xfstests/results//generic/294.out.bad'  to see the entire diff)
Ran: generic/294
Failures: generic/294
Failed 1 of 1 tests

------实际输出------
[root@iZbp1c9jzchxjqive233ufZ xfstests]# cat /root/tone/run/xfstests/results//generic/294.out.bad
QA output created by 294
mount: /fs/nvme1n1p2/ovl-mnt: mount point not mounted or bad option.
       dmesg(1) may have more information after failed mount system call.
Could not remount scratch readonly
(see /root/tone/run/xfstests/results//generic/294.full for details)
------预期输出------
[root@iZbp1c9jzchxjqive233ufZ xfstests]# cat /root/tone/run/xfstests/tests/generic/294.out
QA output created by 294
mknod: SCRATCH_MNT/294.test/testnode: File exists
mkdir: cannot create directory 'SCRATCH_MNT/294.test/testdir': File exists
touch: cannot touch 'SCRATCH_MNT/294.test/testtarget': Read-only file system
ln: creating symbolic link 'SCRATCH_MNT/294.test/testlink': File exists

-----dmesg日志------
[344535.825076] run fstests generic/294 at 2024-05-11 14:12:53
[344536.163880] EXT4-fs (nvme1n1p2): mounted filesystem f887fd91-7575-4cb7-9da5-c1ca104a7073 r/w with ordered data mode. Quota mode: none.
[344536.217069] EXT4-fs (nvme1n1p1): unmounting filesystem 28ff9705-9b43-439a-9b09-dcf920a0f8b8.
[344536.228221] EXT4-fs (nvme1n1p2): unmounting filesystem f887fd91-7575-4cb7-9da5-c1ca104a7073.

[环境信息]：
机器类型：ECS

[内核信息]：
[root@iZbp1c9jzchxjqive233ufZ xfstests]# uname -r
6.6.25-2_rc1.an23.x86_64

[操作系统信息]：
[root@iZbp1c9jzchxjqive233ufZ xfstests]# cat /etc/os-release
NAME="Anolis OS"
VERSION="23"
ID="anolis"
VERSION_ID="23"
PLATFORM_ID="platform:an23"
PRETTY_NAME="Anolis OS 23"
ANSI_COLOR="0;31"
HOME_URL="https://openanolis.cn/"
BUG_REPORT_URL="https://bugzilla.openanolis.cn/"


[文件系统]
[root@iZbp1c9jzchxjqive233ufZ xfstests]# df -Th
Filesystem     Type      Size  Used Avail Use% Mounted on
devtmpfs       devtmpfs  4.0M     0  4.0M   0% /dev
tmpfs          tmpfs     7.6G     0  7.6G   0% /dev/shm
tmpfs          tmpfs     3.1G  592K  3.1G   1% /run
/dev/nvme0n1p2 xfs        40G  5.1G   35G  13% /
tmpfs          tmpfs     7.6G   26M  7.6G   1% /tmp
tmpfs          tmpfs     1.6G     0  1.6G   0% /run/user/0
/dev/nvme1n1p2 ext4       19G  2.1M   18G   1% /fs/nvme1n1p2
/dev/nvme1n1p1 ext4       17G  2.1M   16G   1% /fs/nvme1n1p1

[问题发生概率]：
必现

[复现步骤]：
1、部署xfstests环境
2、部署测试环境
wipefs -a -f /dev/nvme1n1
wipefs -a -f /dev/nvme1n1
partprobe /dev/nvme1n1
parted -s /dev/nvme1n1 mklabel gpt mkpart primary 2048 20480
partprobe /dev/nvme1n1
parted -s /dev/nvme1n1 mkpart primary 20480 40960
mkfs -t ext4 -E lazy_itable_init=0,lazy_journal_init=0 -L OStest -q -F  -q -F /dev/nvme1n1p2
mount  /dev/nvme1n1p2 /fs/nvme1n1p2
mkfs -t ext4 -E lazy_itable_init=0,lazy_journal_init=0 -L OStest -q -F  -q -F /dev/nvme1n1p1
mount  /dev/nvme1n1p1 /fs/nvme1n1p1
export FSTYP=ext4
export TEST_DEV=/dev/nvme1n1p1
export SCRATCH_DEV=/dev/nvme1n1p2
export TEST_DIR=/fs/nvme1n1p1
export SCRATCH_MNT=/fs/nvme1n1p2
3、执行./check -overlay tests/generic/294命令