linux-ext4 - Re: [PATCH v5 04/12] ext4: introduce new callback for IOMAP

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Date:   Wed, 23 Oct 2019 12:09:24 +0530
From:   Ritesh Harjani <riteshh@...ux.ibm.com>
To:     Matthew Bobrowski <mbobrowski@...browski.org>,
        Jan Kara <jack@...e.cz>
Cc:     tytso@....edu, adilger.kernel@...ger.ca,
        linux-ext4@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        hch@...radead.org, david@...morbit.com, darrick.wong@...cle.com
Subject: Re: [PATCH v5 04/12] ext4: introduce new callback for IOMAP_REPORT



On 10/22/19 7:25 AM, Matthew Bobrowski wrote:
> On Mon, Oct 21, 2019 at 03:37:15PM +0200, Jan Kara wrote:
>> On Mon 21-10-19 20:18:09, Matthew Bobrowski wrote:
>> One nit below.
>>> +	ext4_es_find_extent_range(inode, &ext4_es_is_delayed,
>>> +				  map->m_lblk, end, &es);
>>> +
>>> +	if (!es.es_len || es.es_lblk > end)
>>> +		return false;
>>> +
>>> +	if (es.es_lblk > map->m_lblk) {
>>> +		map->m_len = es.es_lblk - map->m_lblk;
>>> +		return false;
>>> +	}
>>> +
>>> +	if (es.es_lblk <= map->m_lblk)
>>
>> This condition must be always true AFAICT.
> 
> That would make sense. I will remove this condition in v6.
> 
>>> +		offset = map->m_lblk - es.es_lblk;
>>> +
>>> +	map->m_lblk = es.es_lblk + offset;

And so, this above line will also be redundant.



>>> +	map->m_len = es.es_len - offset;
>>> +
>>> +	return true;
>>> +}
> 
> --<M>--
>