linux-kernel - Re: [f2fs-dev] [PATCH] f2fs: fix wrong segment count

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Date:   Tue, 14 Feb 2023 09:30:05 +0800
From:   Chao Yu <chao@...nel.org>
To:     Jaegeuk Kim <jaegeuk@...nel.org>
Cc:     linux-kernel@...r.kernel.org,
        linux-f2fs-devel@...ts.sourceforge.net
Subject: Re: [f2fs-dev] [PATCH] f2fs: fix wrong segment count

On 2023/2/14 1:48, Jaegeuk Kim wrote:
> On 02/13, Chao Yu wrote:
>> On 2023/2/11 5:32, Jaegeuk Kim wrote:
>>> MAIN_SEGS is for data area, while TOTAL_SEGS includes data and metadata.
>>
>> Good catch!
>>
>> Could you please add fixes line?
> 
> It seems this is not a bug case, and exisits from the first F2FS patch. :)

Alright, anyway, it looks good to me.

Reviewed-by: Chao Yu <chao@...nel.org>

Thanks,

> 
>>
>> Thanks,
>>
>>>
>>> Signed-off-by: Jaegeuk Kim <jaegeuk@...nel.org>
>>> ---
>>>    fs/f2fs/segment.h | 4 ++--
>>>    1 file changed, 2 insertions(+), 2 deletions(-)
>>>
>>> diff --git a/fs/f2fs/segment.h b/fs/f2fs/segment.h
>>> index 8ee5e5db9287..6003fbaf4b7d 100644
>>> --- a/fs/f2fs/segment.h
>>> +++ b/fs/f2fs/segment.h
>>> @@ -720,7 +720,7 @@ static inline unsigned char curseg_alloc_type(struct f2fs_sb_info *sbi,
>>>    static inline void check_seg_range(struct f2fs_sb_info *sbi, unsigned int segno)
>>>    {
>>> -	f2fs_bug_on(sbi, segno > TOTAL_SEGS(sbi) - 1);
>>> +	f2fs_bug_on(sbi, segno > MAIN_SEGS(sbi) - 1);
>>>    }
>>>    static inline void verify_fio_blkaddr(struct f2fs_io_info *fio)
>>> @@ -775,7 +775,7 @@ static inline int check_block_count(struct f2fs_sb_info *sbi,
>>>    	/* check segment usage, and check boundary of a given segment number */
>>>    	if (unlikely(GET_SIT_VBLOCKS(raw_sit) > usable_blks_per_seg
>>> -					|| segno > TOTAL_SEGS(sbi) - 1)) {
>>> +					|| segno > MAIN_SEGS(sbi) - 1)) {
>>>    		f2fs_err(sbi, "Wrong valid blocks %d or segno %u",
>>>    			 GET_SIT_VBLOCKS(raw_sit), segno);
>>>    		set_sbi_flag(sbi, SBI_NEED_FSCK);