From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail144.messagelabs.com (mail144.messagelabs.com [216.82.254.51]) by kanga.kvack.org (Postfix) with ESMTP id 88AC46B004F for ; Mon, 13 Jul 2009 09:41:47 -0400 (EDT) Date: Mon, 13 Jul 2009 16:05:15 +0200 From: Nick Piggin Subject: Re: [rfc][patch 3/4] fs: new truncate sequence Message-ID: <20090713140515.GB10739@wotan.suse.de> References: <20090707163042.GA14947@infradead.org> <20090708063225.GL2714@wotan.suse.de> <20090708104701.GA31419@infradead.org> <20090708123412.GQ2714@wotan.suse.de> <4A54C435.1000503@panasas.com> <20090709075100.GU2714@wotan.suse.de> <4A59A517.1080605@panasas.com> <20090712144717.GA18163@infradead.org> <20090713065917.GO14666@wotan.suse.de> <20090713135324.GB3685@infradead.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20090713135324.GB3685@infradead.org> Sender: owner-linux-mm@kvack.org To: Christoph Hellwig Cc: Boaz Harrosh , linux-fsdevel@vger.kernel.org, Jan Kara , LKML , linux-mm@kvack.org List-ID: On Mon, Jul 13, 2009 at 09:53:24AM -0400, Christoph Hellwig wrote: > On Mon, Jul 13, 2009 at 08:59:17AM +0200, Nick Piggin wrote: > > Agreed, if it is a common sequence / requirement for filesystems > > then of course I will not object to a helper to make things clearer > > or share code. > > > > I would like to see inode_setattr renamed into simple_setattr, and > > then also .setattr made mandatory, so I don't like to cut code out > > of inode_setattr which makes it unable to be the simple_setattr > > after the old truncate code is removed. > > But inode_setattr isn't anything like simple_setattr. Except for > the truncate special case it's really just a helper to copy values > into the inode. It doesn't even even have the same prototype as > ->setattr. > > A simple_setattr would look like the following: OK that's kind of what I imagine inode_setattr becomes, but now that you make me look at it in that perspective, it is better to say inode_setattr returns to a plain helper to copy values into the inode once we move the truncate code out of there. It would be good to add your simple_setattr and factor it out from fnotify_change, then. I guess this is what you plan to do after my patchset? > > int simple_setattr(struct dentry *dentry, struct iattr *iattr) > { > struct inode *inode = dentry->d_inode; > int error; > > error = inode_change_ok(inode, iattr); > if (error) > return error; > > if ((iattr->ia_valid & ATTR_UID && iattr->ia_uid != inode->i_uid) || > (iattr->ia_valid & ATTR_GID && iattr->ia_gid != inode->i_gid)) { > if (vfs_dq_transfer(inode, iattr)) > return -EDQUOT; > } > > if (iattr->ia_valid & ATTR_ATTR_SIZE && > iattr->ia_size !== i_size_read(inode) && > inode->i_op->new_truncate) { > error = simple_setsize(inode, attr->ia_size); > if (error) > return error; > } > > return inode_setattr(inode, attr); > } -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org