From mboxrd@z Thu Jan 1 00:00:00 1970 From: YOSHIFUJI Hideaki / =?iso-2022-jp?B?GyRCNUhGIzFRTEAbKEI=?= Subject: Re: 2.4.21+ - IPv6 over IPv4 tunneling b0rked Date: Fri, 11 Jul 2003 19:59:17 +0900 (JST) Sender: netdev-bounce@oss.sgi.com Message-ID: <20030711.195917.89662318.yoshfuji@linux-ipv6.org> References: <20030711.194713.21412719.yoshfuji@linux-ipv6.org> Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Cc: mika.liljeberg@welho.com, andre@tomt.net, linux-kernel@vger.kernel.org, netdev@oss.sgi.com, yoshfuji@linux-ipv6.org Return-path: To: pekkas@netcore.fi In-Reply-To: Errors-to: netdev-bounce@oss.sgi.com List-Id: netdev.vger.kernel.org In article (at Fri, 11 Jul 2003 13:47:48 +0300 (EEST)), Pekka Savola says: > On Fri, 11 Jul 2003, YOSHIFUJI Hideaki / [iso-2022-jp] 吉藤英明 wrote: > > In article (at Fri, 11 Jul 2003 13:03:54 +0300 (EEST)), Pekka Savola says: > > > > > > We have but we cannot; it is refcnt'ed. > > > > > > I don't understand what you mean. Refcnt'ed by a userland process, so > > > that if you'd want the subnet-router anycast address, the whole time a > > > process (like radvd) should be running.. or what? > > > > Kernel has refcnt for subnet router anycast address. > > Ref/dereference from userspace is done via socket. > > You cannot derefer subnet router anycast address > > from userspace if the socket hasn't refered it. > > So? The point is that subnet router anycast address *could* be referenced > explicitly by a user-land socket (e.g. by radvd), not kernel at all. So, you cannot remove subnet router anycast address from kernel via this interface; kernel keeps one reference. (Hmm, I may misunderstand your mail...) --yoshfuji