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

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Message-ID: <20240826031005.2493150-1-wozizhi@huawei.com>
Date: Mon, 26 Aug 2024 11:10:03 +0800
From: Zizhi Wo <wozizhi@...wei.com>
To: <chandan.babu@...cle.com>, <djwong@...nel.org>, <dchinner@...hat.com>,
	<osandov@...com>, <john.g.garry@...cle.com>
CC: <linux-xfs@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<wozizhi@...wei.com>, <yangerkun@...wei.com>
Subject: [PATCH 0/2] Some boundary error bugfix related to XFS fsmap.

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(-)

-- 
2.39.2