From: Jaegeuk Kim <jaegeuk@kernel.org>
To: Chao Yu <yuchao0@huawei.com>
Cc: linux-f2fs-devel@lists.sourceforge.net,
linux-kernel@vger.kernel.org, chao@kernel.org
Subject: Re: [PATCH] f2fs: compress: fix to disallow enabling compress on non-empty file
Date: Thu, 24 Sep 2020 13:03:05 -0700 [thread overview]
Message-ID: <20200924200305.GA2568648@google.com> (raw)
In-Reply-To: <20200918030349.19667-1-yuchao0@huawei.com>
On 09/18, Chao Yu wrote:
> Compressed inode and normal inode has different layout, so we should
> disallow enabling compress on non-empty file to avoid race condition
> during inode .i_addr array parsing and updating.
>
> Signed-off-by: Chao Yu <yuchao0@huawei.com>
> ---
> fs/f2fs/file.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
> index 58e464cc15f0..139fdfc1dc55 100644
> --- a/fs/f2fs/file.c
> +++ b/fs/f2fs/file.c
> @@ -1821,6 +1821,8 @@ static int f2fs_setflags_common(struct inode *inode, u32 iflags, u32 mask)
> if (iflags & F2FS_COMPR_FL) {
> if (!f2fs_may_compress(inode))
> return -EINVAL;
> + if (inode->i_size)
Changed like this.
+ if (S_ISREG(inode->i_mode) && inode->i_size)
> + return -EINVAL;
>
> set_compress_context(inode);
> }
> --
> 2.26.2
next prev parent reply other threads:[~2020-09-24 20:03 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-18 3:03 [PATCH] f2fs: compress: fix to disallow enabling compress on non-empty file Chao Yu
2020-09-24 20:03 ` Jaegeuk Kim [this message]
2020-09-25 0:57 ` Chao Yu
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