From: Yu Kuai <yukuai3@xxxxxxxxxx>
This test add and remove a underlying disk to raid concurretly, verify
that the following problem is fixed:
run mdadm test 23rdev-lifetime at Fri Apr 28 03:25:30 UTC 2023
md: could not open device unknown-block(1,0).
sysfs: cannot create duplicate filename '/devices/virtual/block/md0/md/dev-ram0'
CPU: 26 PID: 10521 Comm: test Not tainted 6.3.0-rc2-00134-g7b3a8828043c #115
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.1-2.fc37 04/014
Call Trace:
<TASK>
dump_stack_lvl+0xe7/0x180
dump_stack+0x18/0x30
sysfs_warn_dup+0xa2/0xd0
sysfs_create_dir_ns+0x119/0x140
kobject_add_internal+0x143/0x4d0
kobject_add_varg+0x35/0x70
kobject_add+0x64/0xd0
bind_rdev_to_array+0x254/0x840 [md_mod]
new_dev_store+0x14d/0x350 [md_mod]
md_attr_store+0xc1/0x1a0 [md_mod]
sysfs_kf_write+0x51/0x70
kernfs_fop_write_iter+0x188/0x270
vfs_write+0x27e/0x460
ksys_write+0x85/0x180
__x64_sys_write+0x21/0x30
do_syscall_64+0x6c/0xe0
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f26bacf5387
Code: 0d 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b7 0f 1f 00 f3 0f 1e fa 64 84
RSP: 002b:00007ffe98d79e68 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007f26bacf5387
RDX: 0000000000000004 RSI: 000055bd10282bf0 RDI: 0000000000000001
RBP: 000055bd10282bf0 R08: 000000000000000a R09: 00007f26bad8b4e0
R10: 00007f26bad8b3e0 R11: 0000000000000246 R12: 0000000000000004
R13: 00007f26badc8520 R14: 0000000000000004 R15: 00007f26badc8700
</TASK>
Signed-off-by: Yu Kuai <yukuai3@xxxxxxxxxx>
---
tests/23rdev-lifetime | 48 +++++++++++++++++++++++++++++++++++++++++++
1 file changed, 48 insertions(+)
create mode 100644 tests/23rdev-lifetime
diff --git a/tests/23rdev-lifetime b/tests/23rdev-lifetime
new file mode 100644
index 00000000..df0fcdd9
--- /dev/null
+++ b/tests/23rdev-lifetime
@@ -0,0 +1,48 @@
+devname=${dev0##*/}
+devt=`cat /sys/block/$devname/dev`
+dmesg_marker="run mdadm test 23rdev-lifetime at `date`"
+pid1=0
+pid2=0
+
+stop() {
+ if [[ $1 -ne 0 ]]; then
+ kill -9 $1
+ fi
+}
+
+trap 'stop $pid1; stop $pid2;' EXIT
+
+echo "$dmesg_marker" >> /dev/kmsg
+
+check_dmesg() {
+ dmesg | grep -A 9999 "$dmesg_marker" | grep "sysfs: cannot create duplicate filename"
+
+ if [[ $? -eq 0 ]]; then
+ die "sysfs dumplicate"
+ fi
+}
+
+add_by_sysfs() {
+ while true; do
+ echo $devt > /sys/block/md0/md/new_dev
+ check_dmesg
+ done
+}
+
+remove_by_sysfs(){
+ while true; do
+ echo remove > /sys/block/md0/md/dev-${devname}/state
+ check_dmesg
+ done
+}
+
+echo md0 > /sys/module/md_mod/parameters/new_array || die "create md0 failed"
+
+add_by_sysfs &
+pid1=$!
+
+remove_by_sysfs &
+pid2=$!
+
+sleep 5
+echo clear > /sys/block/md0/md/array_state
--
2.39.2
