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

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Message-ID: <ffcc8474-f2af-1934-9219-f4de6757e4a7@huawei.com>
Date:   Fri, 19 Jun 2020 10:48:15 +0800
From:   Chao Yu <yuchao0@...wei.com>
To:     Zac <zhaowuyun@...gtech.com>, <jaegeuk@...nel.org>
CC:     <linux-f2fs-devel@...ts.sourceforge.net>,
        <linux-kernel@...r.kernel.org>
Subject: Re: 回复: [PATCH] f2fs-tools: set cold flag for non-dir node

On 2020/6/19 10:21, Zac wrote:
>> 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? 

No, but it is worth to use set_node_footer(..., is_dir:true) for cleanup.

Thanks,

> 
>> 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)
>>>
>>>
> 
> .
>