linux-ext4 - Re: [PATCH v2] create_inode: set xattrs to the root directory as well

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Date:   Fri, 17 Jul 2020 05:17:08 -0600
From:   Andreas Dilger <adilger@...ger.ca>
To:     Antoine Tenart <antoine.tenart@...tlin.com>
Cc:     Ext4 Developers List <linux-ext4@...r.kernel.org>,
        matthew.weber@...kwellcollins.com, thomas.petazzoni@...tlin.com
Subject: Re: [PATCH v2] create_inode: set xattrs to the root directory as well


> On Jul 17, 2020, at 4:08 AM, Antoine Tenart <antoine.tenart@...tlin.com> wrote:
> 
> populate_fs do copy the xattrs for all files and directories, but the
> root directory is skipped and as a result its extended attributes aren't
> set. This is an issue when using mkfs to build a full system image that
> can be used with SElinux in enforcing mode without making any runtime
> fix at first boot.
> 
> This patch adds logic to set the root directory's extended attributes.
> 
> Signed-off-by: Antoine Tenart <antoine.tenart@...tlin.com>

Reviewed-by: Andreas Dilger <adilger@...ger.ca>

> ---
> 
> Since v1:
>  - Moved the set_inode_xattr logic for the root directory
>    from __populate_fs to populate_fs2.
> 
> misc/create_inode.c | 8 ++++++++
> 1 file changed, 8 insertions(+)
> 
> diff --git a/misc/create_inode.c b/misc/create_inode.c
> index e8d1df6b55a5..fe66faf1b53d 100644
> --- a/misc/create_inode.c
> +++ b/misc/create_inode.c
> @@ -1050,9 +1050,17 @@ errcode_t populate_fs2(ext2_filsys fs, ext2_ino_t parent_ino,
> 	file_info.path_max_len = 255;
> 	file_info.path = calloc(file_info.path_max_len, 1);
> 
> +	retval = set_inode_xattr(fs, root, source_dir);
> +	if (retval) {
> +		com_err(__func__, retval,
> +			_("while copying xattrs on root directory"));
> +		goto out;
> +	}
> +
> 	retval = __populate_fs(fs, parent_ino, source_dir, root, &hdlinks,
> 			       &file_info, fs_callbacks);
> 
> +out:
> 	free(file_info.path);
> 	free(hdlinks.hdl);
> 	return retval;
> --
> 2.26.2
> 


Cheers, Andreas






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