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SubjectRe: [f2fs-dev] [PATCH v3] f2fs: compress: support chksum
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On 2020/12/8 9:26, Jaegeuk Kim wrote:
> On 12/08, Chao Yu wrote:
>> On 2020/12/8 4:37, Eric Biggers wrote:
>>> On Thu, Nov 26, 2020 at 06:32:09PM +0800, Chao Yu wrote:
>>>> + if (!ret && fi->i_compress_flag & 1 << COMPRESS_CHKSUM) {
>>>
>>> This really could use some parentheses. People shouldn't have to look up a
>>> C operator precedence table to understand the code.
>>
>> Will add parentheses to avoid misread.
>>
>>>
>>>> + u32 provided = le32_to_cpu(dic->cbuf->chksum);
>>>> + u32 calculated = f2fs_crc32(sbi, dic->cbuf->cdata, dic->clen);
>>>> +
>>>> + if (provided != calculated) {
>>>> + if (!is_inode_flag_set(dic->inode, FI_COMPRESS_CORRUPT)) {
>>>> + set_inode_flag(dic->inode, FI_COMPRESS_CORRUPT);
>>>> + printk_ratelimited(
>>>> + "%sF2FS-fs (%s): checksum invalid, nid = %lu, %x vs %x",
>>>> + KERN_INFO, sbi->sb->s_id, dic->inode->i_ino,
>>>> + provided, calculated);
>>>> + }
>>>> + set_sbi_flag(sbi, SBI_NEED_FSCK);
>>>> + WARN_ON_ONCE(1);
>>>
>>> WARN, WARN_ON_ONCE, BUG, BUG_ON, etc. are only for kernel bugs, not for invalid
>>> inputs from disk or userspace.
>>>
>>> There is already a log message printed just above, so it seems this WARN_ON_ONCE
>>> should just be removed.
>>
>> Jaegeuk wants to give WARN_ON and marking a FSCK flag without returning EFSCORRUPTED,
>
> I think above printk_ratelimited should be enough.

Okay, so let me update the patch.

Thanks,

>
>>
>> Jaegeuk, thoughts?
>>
>> Thanks,
>>
>>>
>>> - Eric
>>> .
>>>
> .
>

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