linux-ext4 - Re: [PATCH] ext4: handle ext4_mark_inode

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Message-ID: <20200518015630.GA2339693@mit.edu>
Date:   Sun, 17 May 2020 21:56:30 -0400
From:   "Theodore Y. Ts'o" <tytso@....edu>
To:     Harshad Shirwadkar <harshadshirwadkar@...il.com>
Cc:     linux-ext4@...r.kernel.org
Subject: Re: [PATCH] ext4: handle ext4_mark_inode_dirty errors

On Sun, Apr 26, 2020 at 06:34:37PM -0700, Harshad Shirwadkar wrote:
> ext4_mark_inode_dirty() can fail for real reasons. Ignoring its return
> value may lead ext4 to ignore real failures that would result in
> corruption / crashes. Harden ext4_mark_inode_dirty error paths to fail
> as soon as possible and return errors to the caller whenever
> appropriate.
> 
> One of the possible scnearios when this bug could affected is that
> while creating a new inode, its directory entry gets added
> successfully but while writing the inode itself mark_inode_dirty
> returns error which is ignored. This would result in inconsistency
> that the directory entry points to a non-existent inode.
> 
> Ran gce-xfstests smoke tests and verified that there were no
> regressions.
> 
> Signed-off-by: Harshad Shirwadkar <harshadshirwadkar@...il.com>

Applied, thanks.

						- Ted