lkml.org 
[lkml]   [2020]   [Sep]   [24]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] f2fs: compress: fix to disallow enabling compress on non-empty file
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

\
 
 \ /
  Last update: 2020-09-24 22:03    [W:0.050 / U:0.620 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site