linux-ext4 - Re: [PATCH v5 0/3] ext4: fix a inode checksum error

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Date:   Thu, 14 Oct 2021 18:57:36 +0800
From:   Zhang Yi <yi.zhang@...wei.com>
To:     <tytso@....edu>
CC:     <adilger.kernel@...ger.ca>, <jack@...e.cz>, <yukuai3@...wei.com>,
        <linux-ext4@...r.kernel.org>
Subject: Re: [PATCH v5 0/3] ext4: fix a inode checksum error

Hi, Ted. Do you consider to merge this remaining patch set?

Thanks,
Yi.

On 2021/9/1 10:09, Zhang Yi wrote:
> We find a checksum error and a inode corruption problem while doing
> stress test, this 3 patches address to fix them. The first two patches
> are prepare to do the fix, the last patch fix these two issue.
> 
>  - Checksum error
> 
>     EXT4-fs error (device sda): ext4_lookup:1784: inode #131074: comm cat: iget: checksum invalid
> 
>  - Inode corruption
> 
>     e2fsck 1.46.0 (29-Jan-2020)
>     Pass 1: Checking inodes, blocks, and sizes
>     Pass 2: Checking directory structure
>     Entry 'foo' in / (2) has deleted/unused inode 17.  Clear<y>? yes
>     Pass 3: Checking directory connectivity
>     Pass 4: Checking reference counts
>     Pass 5: Checking group summary information
>     Inode bitmap differences:  -17
>     Fix<y>? yes
>     Free inodes count wrong for group #0 (32750, counted=32751).
>     Fix<y>? yes
>     Free inodes count wrong (32750, counted=32751).
>     Fix<y>? yes
> 
> Changes since v4:
>  - Drop first three already applied patches.
>  - Remove 'in_mem' parameter passing __ext4_get_inode_loc() in the last
>    patch.
> 
> Changes since v3:
>  - Postpone initialization to ext4_do_update_inode() may cause zeroout
>    newly set xattr entry. So switch to do initialization in
>    __ext4_get_inode_loc().
> 
> Changes since v2:
>  - Instead of using WARN_ON_ONCE to prevent ext4_do_update_inode()
>    return before filling the inode buffer, keep the error and postpone
>    the report after the updating in the third patch.
>  - Fix some language mistacks in the last patch.
> 
> Changes since v1:
>  - Add a patch to prevent ext4_do_update_inode() return before filling
>    the inode buffer.
>  - Do not use BH_New flag to indicate the empty buffer, postpone the
>    zero and uptodate logic into ext4_do_update_inode() before filling
>    the inode buffer.
> 
> Thanks,
> Yi.
> 
> Zhang Yi (3):
>   ext4: factor out ext4_fill_raw_inode()
>   ext4: move ext4_fill_raw_inode() related functions
>   ext4: prevent getting empty inode buffer
> 
>  fs/ext4/inode.c | 316 +++++++++++++++++++++++++-----------------------
>  1 file changed, 165 insertions(+), 151 deletions(-)
>