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Date:   Tue, 18 Sep 2018 18:54:37 +0900
From:   Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>
To:     David Howells <dhowells@redhat.com>
Cc:     viro@zeniv.linux.org.uk, torvalds@linux-foundation.org,
        linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 14/33] vfs: Implement a filesystem superblock
 creation/configuration context [ver #11]
Message-ID: <20180918095437.GB417@jagdpanzerIV>
References: <153313703562.13253.5766498657900728120.stgit@warthog.procyon.org.uk>
 <153313714181.13253.304098108512966976.stgit@warthog.procyon.org.uk>
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On (08/01/18 16:25), David Howells wrote:
[..]
> @@ -2460,18 +2428,41 @@ static int do_remount(struct path *path, int ms_flags, int sb_flags,
>  	if (!can_change_locked_flags(mnt, mnt_flags))
>  		return -EPERM;
>  
> -	err = security_sb_remount(sb, data, data_size);
> -	if (err)
> -		return err;
> +	if (type->init_fs_context) {
> +		fc = vfs_sb_reconfig(path, sb_flags);
> +		if (IS_ERR(fc))
> +			return PTR_ERR(fc);
> +
> +		err = parse_monolithic_mount_data(fc, data, data_size);
> +		if (err < 0)
> +			goto err_fc;
> +
> +		if (fc->ops->validate) {
> +			err = fc->ops->validate(fc);
> +			if (err < 0)
> +				goto err_fc;
> +		}
> +
> +		err = security_fs_context_validate(fc);
> +		if (err)
> +			return err;

		goto err_fc?

> +	} else {
> +		err = security_sb_remount(sb, data, data_size);
> +		if (err)
> +			return err;
> +	}

		goto err_fc?

	-ss