From mboxrd@z Thu Jan 1 00:00:00 1970 From: Wu Fengguang Subject: [PATCH] ipconfig: document DHCP hostname and DNS record Date: Thu, 3 Jun 2010 10:02:44 +0800 Message-ID: <20100603020244.GB4461@localhost> References: <20100531031953.GA10590@localhost> <20100602.070531.73368509.davem@davemloft.net> <20100602185601.GB14221@basil.fritz.box> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: David Miller , "netdev@vger.kernel.org" , "linux-kernel@vger.kernel.org" To: Andi Kleen Return-path: Content-Disposition: inline In-Reply-To: <20100602185601.GB14221@basil.fritz.box> Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org On Thu, Jun 03, 2010 at 02:56:01AM +0800, Andi Kleen wrote: > On Wed, Jun 02, 2010 at 07:05:31AM -0700, David Miller wrote: > > From: Wu Fengguang > > Date: Mon, 31 May 2010 11:19:53 +0800 > > > > > Normally dhclient can be configured to send the "host-name" option > > > in DHCP requests to update the client's DNS record. However for an > > > NFSROOT system, dhclient shall never be called (which may change the > > > IP addr and therefore lose your root NFS mount connection). > > > > > > So enable updating the DNS record with kernel parameter > > > > > > ip=::::$HOST_NAME::dhcp > > > > > > Signed-off-by: Wu Fengguang > > > > Applied, thanks. > > Small nit: Fengguang, please document the new option in > Documentation/kernel-parameters.txt That could be done in a follow-on patch. Good suggestion! Here is the document update. Thanks, Fengguang --- ipconfig: document DHCP hostname and DNS record Now it's possible to update the DNS record for $HOST_NAME with ip=::::$HOST_NAME::dhcp CC: Andi Kleen Signed-off-by: Wu Fengguang --- Documentation/filesystems/nfs/nfsroot.txt | 2 ++ 1 file changed, 2 insertions(+) --- linux.orig/Documentation/filesystems/nfs/nfsroot.txt 2010-06-03 09:52:17.000000000 +0800 +++ linux/Documentation/filesystems/nfs/nfsroot.txt 2010-06-03 09:52:19.000000000 +0800 @@ -124,6 +124,8 @@ ip=::: Name of the client. May be supplied by autoconfiguration, but its absence will not trigger autoconfiguration. + If specified and DHCP is used, the user provided hostname will + be carried in the DHCP request to hopefully update DNS record. Default: Client IP address is used in ASCII notation.