linux-ext4 - Re: [PATCH 03/13] xfs: free the mount in ->kill

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Message-ID: <20230809-besang-chaoten-642fff8a141a@brauner>
Date:   Wed, 9 Aug 2023 09:38:13 +0200
From:   Christian Brauner <brauner@...nel.org>
To:     Christoph Hellwig <hch@....de>
Cc:     Al Viro <viro@...iv.linux.org.uk>,
        Namjae Jeon <linkinjeon@...nel.org>,
        Sungjong Seo <sj1557.seo@...sung.com>,
        Theodore Ts'o <tytso@....edu>,
        Andreas Dilger <adilger.kernel@...ger.ca>,
        Konstantin Komarov <almaz.alexandrovich@...agon-software.com>,
        "Darrick J. Wong" <djwong@...nel.org>,
        linux-fsdevel@...r.kernel.org, linux-ext4@...r.kernel.org,
        ntfs3@...ts.linux.dev, linux-xfs@...r.kernel.org
Subject: Re: [PATCH 03/13] xfs: free the mount in ->kill_sb

On Tue, Aug 08, 2023 at 09:15:50AM -0700, Christoph Hellwig wrote:
> As a rule of thumb everything allocated to the fs_context and moved into
> the super_block should be freed by ->kill_sb so that the teardown
> handling doesn't need to be duplicated between the fill_super error
> path and put_super.  Implement a XFS-specific kill_sb method to do that.
> 
> Signed-off-by: Christoph Hellwig <hch@....de>
> ---

Looks good to me,
Reviewed-by: Christian Brauner <brauner@...nel.org>

For filesystems on the new mount api it's always nice if the rules
can simply be made:

* prior to sget_fc() succeeding fc->s_fs_info and freed in fs_context_operations->free()
* after    sget_fc() succeeding fc->s_fs_info transfered to sb->s_fs_info and freed in fs_type->kill_sb()