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SubjectRe: [PATCH] f2fs: compress: fix to disallow enabling compress on non-empty file
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On 2020/9/25 4:03, Jaegeuk Kim wrote:
> 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)

My bad, thanks for fixing this. :)

Thanks,

>
>
>> + return -EINVAL;
>>
>> set_compress_context(inode);
>> }
>> --
>> 2.26.2
> .
>

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