linux-kernel - Re: [PATCH 00/11 v2] Push file_update_time() into .page

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: <20120302094122.GA1744@quack.suse.cz>
Date:	Fri, 2 Mar 2012 10:41:22 +0100
From:	Jan Kara <jack@...e.cz>
To:	Ted Ts'o <tytso@....edu>
Cc:	Jan Kara <jack@...e.cz>, Andrew Morton <akpm@...ux-foundation.org>,
	linux-mm@...ck.org, LKML <linux-kernel@...r.kernel.org>,
	Al Viro <viro@...IV.linux.org.uk>,
	linux-fsdevel@...r.kernel.org, dchinner@...hat.com,
	Jaya Kumar <jayalk@...works.biz>,
	Sage Weil <sage@...dream.net>, ceph-devel@...r.kernel.org,
	Steve French <sfrench@...ba.org>, linux-cifs@...r.kernel.org,
	Eric Van Hensbergen <ericvh@...il.com>,
	Ron Minnich <rminnich@...dia.gov>,
	Latchesar Ionkov <lucho@...kov.net>,
	v9fs-developer@...ts.sourceforge.net,
	Miklos Szeredi <miklos@...redi.hu>,
	fuse-devel@...ts.sourceforge.net,
	Steven Whitehouse <swhiteho@...hat.com>,
	cluster-devel@...hat.com,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: [PATCH 00/11 v2] Push file_update_time() into .page_mkwrite

On Thu 01-03-12 18:29:42, Ted Tso wrote:
> On Thu, Mar 01, 2012 at 12:41:34PM +0100, Jan Kara wrote:
> > 
> > To fix the issue, this patch set changes page fault code to call
> > file_update_time() only when ->page_mkwrite() callback is not provided. If the
> > callback is provided, it is the responsibility of the filesystem to perform
> > update of i_mtime / i_ctime if needed. We also push file_update_time() call
> > to all existing ->page_mkwrite() implementations if the time update does not
> > obviously happen by other means. If you know your filesystem does not need
> > update of modification times in ->page_mkwrite() handler, please speak up and
> > I'll drop the patch for your filesystem.
> 
> I don't know if this introductory text is going to be saved anywhere
> permanent, such as the merge commit (since git now has the ability to
> have much more informative merge descriptions).  But if it is going to
> be preserved, it might be worth mentioning that if the filesystem uses
> block_page_mkpage(), it will handled automatically for them since the
> patch series does push the call to file_update_time(0 into
> __block_page_mkpage().
  Good point, added to description.

								Honza
-- 
Jan Kara <jack@...e.cz>
SUSE Labs, CR
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/