linux-ext4 - Re: [PATCH 0/3] fs: Introduce FALLOC_FL_INSERT

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CAKYAXd8adbqepWeDADDtbzk7bTrhXK0CccgewNDsqu0u+HnC4g@mail.gmail.com>
Date:	Tue, 1 Apr 2014 09:19:12 +0900
From:	Namjae Jeon <linkinjeon@...il.com>
To:	Christoph Hellwig <hch@...radead.org>
Cc:	Alexander Viro <viro@...iv.linux.org.uk>,
	Dave Chinner <david@...morbit.com>,
	"Theodore Ts'o" <tytso@....edu>,
	"adilger.kernel@...ger.ca" <adilger.kernel@...ger.ca>,
	Jan Kara <jack@...e.cz>,
	Lukáš Czerner <lczerner@...hat.com>,
	linux-fsdevel <linux-fsdevel@...r.kernel.org>, xfs@....sgi.com,
	"linux-ext4@...r.kernel.org" <linux-ext4@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Namjae Jeon <namjae.jeon@...sung.com>
Subject: Re: [PATCH 0/3] fs: Introduce FALLOC_FL_INSERT_RANGE for fallocate

2014-03-31 23:56 GMT+09:00 Christoph Hellwig <hch@...radead.org>:
> On Mon, Mar 31, 2014 at 11:53:31PM +0900, Namjae Jeon wrote:
>> This flag will work opposite to the newly added FALLOC_FL_COLLAPSE_RANGE flag.
>> As such, specifying FALLOC_FL_INSERT_RANGE flag will insert zeroed-out space
>> in between the file within the range specified by offset and len. User can
>> write new data in this space. e.g. ads.
>> Like collapse range, currently we have the limitation that offset and len
>> should be block size aligned for both XFS and Ext4.
>
> Btw, I remember Samsung also had an ioctl for XFS to split a file into
> two without moving the data, do you plan to submit that one as well?
>
Hi Christoph.
Sure, I'm planning to introduce FS_IOC_MOVE_DATA ioctl that can split
file as well as merging for xfs and ext4.
I already started to implement it. and will post it soon.

Thanks.
--
To unsubscribe from this list: send the line "unsubscribe linux-ext4" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html