From mboxrd@z Thu Jan 1 00:00:00 1970 From: Al Viro Subject: Re: [RFC] st_nlink after rmdir() and rename() Date: Thu, 3 Mar 2011 23:12:34 +0000 Message-ID: <20110303231234.GS22723@ZenIV.linux.org.uk> References: <20110303032454.GI22723@ZenIV.linux.org.uk> <20110303060352.GK22723@ZenIV.linux.org.uk> <87tyfk7x0c.fsf@devron.myhome.or.jp> <87lj0v9984.fsf@devron.myhome.or.jp> <87hbbj96yh.fsf@devron.myhome.or.jp> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Linus Torvalds , linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org To: OGAWA Hirofumi Return-path: Content-Disposition: inline In-Reply-To: <87hbbj96yh.fsf@devron.myhome.or.jp> Sender: linux-kernel-owner@vger.kernel.org List-Id: linux-fsdevel.vger.kernel.org On Fri, Mar 04, 2011 at 07:26:14AM +0900, OGAWA Hirofumi wrote: > Linus Torvalds writes: > > > On Thu, Mar 3, 2011 at 1:37 PM, OGAWA Hirofumi > > wrote: > >> > >> And I can't only see is why you refuse to make consistent behavior (if > >> you are saying it). It's why I said if it's _really easy_. > > > > The thing is, it really isn't really easy. As mentioned, it's actually > > impossible on NFS, and it's possibly impossible on other filesystems > > too. > > I don't know much about NFS though, I imaged the NFS just fill the > stat.st_nlink to return to userland by 0 if sillyrenamed dentry? (of > course, I'm not saying let's emulate "i_nlink >= 1" on all > filesystems. just about i_nlink == 0) I was thinking Al is working for > it... No. I don't really care much about what NFS does with st_nlink. It might be possible to fake for directories, but you'll have a hell of a time doing that accurately for regular files. Not worth doing.