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

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Date:   Tue, 14 Feb 2023 10:00:33 -0800
From:   Jaegeuk Kim <jaegeuk@...nel.org>
To:     Chao Yu <chao@...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 02/14, Chao Yu wrote:
> 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>

I assumed this for v2. Let me know if you have other concern.

> 
> 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);