linux-kernel - Re: [f2fs-dev] [PATCH RESEND] f2fs: fix to restrict mount condition when without CONFIG

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Message-ID: <4b46f8b3-2858-a528-de53-c2de333c3314@huawei.com>
Date:   Thu, 26 Jul 2018 09:41:55 +0800
From:   Sheng Yong <shengyong1@...wei.com>
To:     Chao Yu <chao@...nel.org>, <jaegeuk@...nel.org>
CC:     <linux-kernel@...r.kernel.org>,
        <linux-f2fs-devel@...ts.sourceforge.net>
Subject: Re: [f2fs-dev] [PATCH RESEND] f2fs: fix to restrict mount condition
 when without CONFIG_QUOTA

Hi, Chao

On 2018/7/26 7:19, Chao Yu wrote:
> From: Chao Yu <yuchao0@...wei.com>
> 
> Like quota_ino feature, we need to reject mounting RDWR with image
> which enables project_quota feature when there is no CONFIG_QUOTA
> be set in kernel.
> 
> Signed-off-by: Chao Yu <yuchao0@...wei.com>
> ---
>   fs/f2fs/super.c | 6 ++++++
>   1 file changed, 6 insertions(+)
> 
> diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
> index dbc1cb53581f..bc7c14a055bb 100644
> --- a/fs/f2fs/super.c
> +++ b/fs/f2fs/super.c
> @@ -775,6 +775,12 @@ static int parse_options(struct super_block *sb, char *options)
>   			 "without CONFIG_QUOTA");
>   		return -EINVAL;
>   	}

I think the following should be checked within !CONFIG_QUOTA, like patch "f2fs: quota: do
not mount as RDWR without QUOTA if quota feature enabled" :)

thanks

> +	if (f2fs_sb_has_project_quota(sbi->sb) && !f2fs_readonly(sbi->sb)) {
> +		f2fs_msg(sb, KERN_ERR,
> +			"Filesystem with project quota feature cannot be "
> +			"mounted RDWR without CONFIG_QUOTA");
> +		return -EINVAL;
> +	}
>   #endif
>   
>   	if (F2FS_IO_SIZE_BITS(sbi) && !test_opt(sbi, LFS)) {
>