linux-kernel - Re: [PATCH 0/2] Some boundary error bugfix related to XFS fsmap.

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Message-ID: <9ab7ee3d-cf97-47b0-91dd-c5451911b455@huawei.com>
Date: Wed, 9 Oct 2024 21:01:10 +0800
From: Zizhi Wo <wozizhi@...wei.com>
To: "Darrick J. Wong" <djwong@...nel.org>
CC: <chandan.babu@...cle.com>, <dchinner@...hat.com>, <osandov@...com>,
	<john.g.garry@...cle.com>, <linux-xfs@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, <yangerkun@...wei.com>
Subject: Re: [PATCH 0/2] Some boundary error bugfix related to XFS fsmap.

Hi!

Here are two patches that address fsmap statistics errors. I sent out
this version in August, and I hope someone can take some time to review
them. So friendly ping. Thanks in advance!


在 2024/9/3 3:08, Darrick J. Wong 写道:
> On Thu, Aug 29, 2024 at 07:24:55PM +0800, Zizhi Wo wrote:
>> friendly ping
> 
> Sorry, I'm not going to get to this until late September.
> 
> --D
> 
>> 在 2024/8/26 11:10, Zizhi Wo 写道:
>>> Prior to this, I had already sent out a patchset related to xfs fsmap
>>> bugfix, which mainly introduced "info->end_daddr" to fix omitted extents[1]
>>> and Darrick had already sent out a patchbomb for merging into stable[2],
>>> which included my previous patches.
>>>
>>> However, I recently discovered two new fsmap problems...What follows is a
>>> brief description of them:
>>>
>>> Patch 1: In this scenario, fsmap lost one block count. The root cause is
>>> that during the calculation of highkey, the calculation of start_block is
>>> missing an increment by one, which leads to the last query missing one
>>> This problem is resolved by adding a sentinel node.
>>>
>>> Patch 2: In this scenario, the fsmap query for realtime deivce may display
>>> extra intervals. This is due to an extra increase in "end_rtb". The issue
>>> is resolved by adjusting the relevant calculations. And this patch depends
>>> on the previous patch that introduced "info->end_daddr".
>>>
>>> [1] https://lore.kernel.org/all/20240819005320.304211-1-wozizhi@huawei.com/
>>> [2] https://lore.kernel.org/all/172437083728.56860.10056307551249098606.stgit@frogsfrogsfrogs/
>>>
>>> Zizhi Wo (2):
>>>     xfs: Fix missing block calculations in xfs datadev fsmap
>>>     xfs: Fix incorrect parameter calculation in rt fsmap
>>>
>>>    fs/xfs/libxfs/xfs_rtbitmap.c |  4 +---
>>>    fs/xfs/xfs_fsmap.c           | 39 +++++++++++++++++++++++++++++++-----
>>>    2 files changed, 35 insertions(+), 8 deletions(-)
>>>
>>
>