Re: [PATCH] multipathd: LUN protection by checking path's wwid change status

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Thanks Martin, I will try to reproduce this issue with the latest version when the enviroments ready, if reproduce it again I will let you know, thanks again~

On 2021/1/7 19:27, Martin Wilck wrote:
On Thu, 2021-01-07 at 10:23 +0800, Chongyun Wu wrote:
Hello Martin,
Thanks for view this patch.

On 2021/1/7 5:10, Martin Wilck wrote:
Hello Chongyun,

On Mon, 2020-12-28 at 11:34 +0800, Chongyun Wu wrote:
   From 37c74873acfc1587e79a6504ca3d42b8fa00d49e Mon Sep 17
00:00:00
2001

From: Chongyun Wu <wucy11@xxxxxxxxxxxxxxx>
Date: Mon, 21 Dec 2020 09:51:20 +0800
Subject: [PATCH] multipathd: LUN data protection by checking
path's
wwid
    change status

Issue description:
A) Device sda and sdb correspend to LUN1 and LUN2 in storage
backend
and
the upper layer application uses those two devices.
B) Doing illegal operation: unmapping LUN1 and LUN2 in storage
backend,
and export LUN2 and LUN1 to host with exchanged assignment
relation
between sda and sdb.
C) The upper layer application run for a while and found that the
data
in both LUN1 and LUN2 has been corrupted.

Can you please be explicit about which multipath-tools version you
have
tested? I thought we had the wwid change issues covered. Ben and I
have
been putting quite some effort into this recently. Of course we can
be
wrong, but I'd like to understand the issue fully.

The test version is 0.8.3.

A test with 0.8.5 would be in necessary, then. The INIT_REMOVED logic
has been added after 0.8.4.

Please confirm that you've been using the latest version from
Christophe's repo (or better even, from my upstream-queue), and
provide
-v3 logs showing what goes wrong.
Sorry Martin, I haven't save the logs and the enviroment is
unavailable now.

Well, please report back if you can reproduce the issue with current
upstream.

Regards,
Martin



--
Best Regard,
Chongyun Wu


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