linux-kernel - Re: [PATCH v2] f2fs: allow compression of files without blocks

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Date:   Tue, 12 Jul 2022 11:20:22 +0800
From:   Chao Yu <chao@...nel.org>
To:     Jaegeuk Kim <jaegeuk@...nel.org>, Chao Liu <chaoliu719@...il.com>
Cc:     linux-f2fs-devel@...ts.sourceforge.net,
        linux-kernel@...r.kernel.org, Yue Hu <huyue2@...lpad.com>,
        Wayne Zhang <zhangwen@...lpad.com>,
        Chao Liu <liuchao@...lpad.com>
Subject: Re: [PATCH v2] f2fs: allow compression of files without blocks

On 2022/7/12 9:36, Jaegeuk Kim wrote:
> On 07/07, Chao Liu wrote:
>> From: Chao Liu <liuchao@...lpad.com>
>>
>> Files created by truncate(1) have a size but no blocks, so
>> they can be allowed to enable compression.
>>
>> Signed-off-by: Chao Liu <liuchao@...lpad.com>
>> ---
>> v2:
>>   - update commit message: truncate -> truncate(1)
>>
>>   fs/f2fs/file.c | 2 +-
>>   1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
>> index 0f29af7876a6..f7a82858486a 100644
>> --- a/fs/f2fs/file.c
>> +++ b/fs/f2fs/file.c
>> @@ -1879,7 +1879,7 @@ 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 (S_ISREG(inode->i_mode) && inode->i_size)
>> +			if (S_ISREG(inode->i_mode) && F2FS_HAS_BLOCKS(inode))
> 
> What about inline_data case?

How about fixing this w/ a separated patch?

f2fs: fix to check inline_data during compressed inode conversion

Thanks,

> 
>>   				return -EINVAL;
>>
>>   			set_compress_context(inode);
>> --
>> 2.36.1