linux-ext4 - Re: [PATCH 2/2] f2fs: only set project inherit bit for directory

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Date:   Thu, 13 Jun 2019 14:36:21 +0800
From:   Chao Yu <yuchao0@...wei.com>
To:     Wang Shilong <wangshilong1991@...il.com>,
        <linux-ext4@...r.kernel.org>,
        <linux-f2fs-devel@...ts.sourceforge.net>
CC:     Wang Shilong <wshilong@....com>, Andreas Dilger <adilger@...ger.ca>
Subject: Re: [PATCH 2/2] f2fs: only set project inherit bit for directory

On 2019/6/6 12:32, Wang Shilong wrote:
> From: Wang Shilong <wshilong@....com>
> 
> It doesn't make any sense to have project inherit bits
> for regular files, even though this won't cause any
> problem, but it is better fix this.
> 
> Cc: Andreas Dilger <adilger@...ger.ca>
> Signed-off-by: Wang Shilong <wshilong@....com>
> ---
>  fs/f2fs/f2fs.h | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
> index 06b89a9862ab..f02ebecb68ea 100644
> --- a/fs/f2fs/f2fs.h
> +++ b/fs/f2fs/f2fs.h
> @@ -2370,7 +2370,8 @@ static inline void f2fs_change_bit(unsigned int nr, char *addr)
>  			   F2FS_PROJINHERIT_FL)
>  
>  /* Flags that are appropriate for regular files (all but dir-specific ones). */
> -#define F2FS_REG_FLMASK		(~(F2FS_DIRSYNC_FL | F2FS_TOPDIR_FL))
> +#define F2FS_REG_FLMASK 	(~(F2FS_DIRSYNC_FL | F2FS_TOPDIR_FL |\
> +				   F2FS_PROJINHERIT_FL))

Hi Shilong,

Could you please add below diff as ext4 did?

diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index efdafa886510..295ca5ed42d9 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -1759,6 +1759,9 @@ static int f2fs_ioc_getflags(struct file *filp, unsigned
long arg)

 	fsflags &= F2FS_GETTABLE_FS_FL;

+	if (S_ISREG(inode->i_mode))
+		fsflags &= ~FS_PROJINHERIT_FL;
+
 	return put_user(fsflags, (int __user *)arg);
 }

Thanks,

>  
>  /* Flags that are appropriate for non-directories/regular files. */
>  #define F2FS_OTHER_FLMASK	(F2FS_NODUMP_FL | F2FS_NOATIME_FL)
>