linux-kernel - 回复: [PATCH] f2fs-tools: set cold flag for non-dir node

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Date:   Fri, 19 Jun 2020 10:21:07 +0800
From:   "Zac" <zhaowuyun@...gtech.com>
To:     "'Chao Yu'" <yuchao0@...wei.com>, <jaegeuk@...nel.org>
Cc:     <linux-f2fs-devel@...ts.sourceforge.net>,
        <linux-kernel@...r.kernel.org>
Subject: 回复: [PATCH] f2fs-tools: set cold flag for non-dir node

> On 2020/6/18 20:48, zhaowuyun@...gtech.com wrote:
> > From: Wuyun Zhao <zhaowuyun@...gtech.com>
> 
> Thanks for the patch. :)
> 
> Please add commit message here.

OK

> >
> > Signed-off-by: Wuyun Zhao <zhaowuyun@...gtech.com>
> > ---
> >  fsck/dir.c  |  1 +
> >  fsck/node.c |  1 +
> >  fsck/node.h | 11 +++++++++++
> >  3 files changed, 13 insertions(+)
> >
> > diff --git a/fsck/dir.c b/fsck/dir.c
> > index 5f4f75e..dc03c98 100644
> > --- a/fsck/dir.c
> > +++ b/fsck/dir.c
> > @@ -522,6 +522,7 @@ static void init_inode_block(struct f2fs_sb_info
> *sbi,
> >  	node_blk->footer.nid = cpu_to_le32(de->ino);
> >  	node_blk->footer.flag = 0;
> >  	node_blk->footer.cp_ver = ckpt->checkpoint_ver;
> > +	set_cold_node(node_blk, S_ISDIR(mode));
> >
> >  	if (S_ISDIR(mode)) {
> >  		make_empty_dir(sbi, node_blk);
> > diff --git a/fsck/node.c b/fsck/node.c
> > index 229a99c..1d291ca 100644
> > --- a/fsck/node.c
> > +++ b/fsck/node.c
> > @@ -79,6 +79,7 @@ block_t new_node_block(struct f2fs_sb_info *sbi,
> >  	node_blk->footer.ino = f2fs_inode->footer.ino;
> >  	node_blk->footer.flag = cpu_to_le32(ofs << OFFSET_BIT_SHIFT);
> >  	node_blk->footer.cp_ver = ckpt->checkpoint_ver;
> > +	set_cold_node(node_blk, S_ISDIR(le16_to_cpu(f2fs_inode->i.i_mode)));
> 
> How about wrapping these node footer fields assignment into a function?
> then
> we can reuse this in other places.
> 
> void set_node_footer(nid, ino, ofs, ver, is_dir)
> {
> 	node_blk->footer.nid = cpu_to_le32(nid);
> 	node_blk->footer.ino = f2fs_inode->footer.ino;
> 	node_blk->footer.flag = cpu_to_le32(ofs << OFFSET_BIT_SHIFT);
> 	node_blk->footer.cp_ver = ckpt->checkpoint_ver;
> 	set_cold_node(node_blk, S_ISDIR(le16_to_cpu(f2fs_inode->i.i_mode)));
> }

Ok, That's good.

> >
> >  	type = CURSEG_COLD_NODE;
> >  	if (IS_DNODE(node_blk)) {
> > diff --git a/fsck/node.h b/fsck/node.h
> > index 6bce1fb..99139b1 100644
> > --- a/fsck/node.h
> > +++ b/fsck/node.h
> > @@ -161,6 +161,17 @@ static inline int is_node(struct f2fs_node
> *node_blk, int type)
> >  	return le32_to_cpu(node_blk->footer.flag) & (1 << type);
> >  }
> 
> Beside this, I think we need to use set_node_footer() in:
> - f2fs_write_root_inode
> - f2fs_write_qf_inode
> - f2fs_write_lpf_inode
> 
> as well to fix mkfs bugs.

the root inode and the lpf inode is dir, need to set cold flag? 

> Thanks,
> 
> >
> > +static inline void set_cold_node(struct f2fs_node *rn, bool is_dir)
> > +{
> > +	unsigned int flag = le32_to_cpu(rn->footer.flag);
> > +
> > +	if (is_dir)
> > +		flag &= ~(0x1 << COLD_BIT_SHIFT);
> > +	else
> > +		flag |= (0x1 << COLD_BIT_SHIFT);
> > +	rn->footer.flag = cpu_to_le32(flag);
> > +}
> > +
> >  #define is_fsync_dnode(node_blk)	is_node(node_blk, FSYNC_BIT_SHIFT)
> >  #define is_dent_dnode(node_blk)		is_node(node_blk,
> DENT_BIT_SHIFT)
> >
> >