linux-kernel - Re: [PATCH] LogFS take three

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Message-ID: <20070516021139.GA3175@lazybastard.org>
Date:	Wed, 16 May 2007 04:11:39 +0200
From:	Jörn Engel <joern@...ybastard.org>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-mtd@...ts.infradead.org, Albert Cahalan <acahalan@...il.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Jan Engelhardt <jengelh@...ux01.gwdg.de>,
	Evgeniy Polyakov <johnpol@....mipt.ru>,
	Pekka Enberg <penberg@...helsinki.fi>,
	Greg KH <greg@...ah.com>, Ingo Oeser <ioe-lkml@...eria.de>
Subject: Re: [PATCH] LogFS take three

On Wed, 16 May 2007 02:06:31 +0200, Jörn Engel wrote:
>
> > > +
> > > +	if (dest) {
> > > +		/* symlink */
> > > +		ret = logfs_inode_write(inode, dest, destlen, 0);
> > > +	} else {
> > > +		/* creat/mkdir/mknod */
> > > +		ret = __logfs_write_inode(inode);
> > > +	}
> > > +	super->s_victim_ino = 0;
> > > +	if (ret) {
> > > +		if (!dest)
> > > +			li->li_flags |= LOGFS_IF_STILLBORN;
> > > +		/* FIXME: truncate symlink */
> > > +		inode->i_nlink--;
> > > +		iput(inode);
> > > +		goto out;
> > > +	}
> > > +
> > > +	if (inode->i_mode & S_IFDIR)
> > > +		dir->i_nlink++;
> > 
> > You have helper functions for i_nlink++, which remember to do
> > mark_inode_dirty()?
> 
> I do.  Looks like I should use them here and in at least one other
> place.  Will recheck them all.

Actually, this code was correct.  New inodes get written immediatly to
ensure catching -ENOSPC at a place where errors can get returned.  After
leaving this function, the inode is not dirty.  Either it has been
written or it is marked LOGFS_IF_STILLBORN never will be.

Your intuition was still good.  Link() did need the change you
indicated.

Jörn

-- 
Joern's library part 14:
http://www.sandpile.org/
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