Commit 130c0f47 authored May 30, 2010 by Wu Fengguang Committed by David S. Miller Jun 02, 2010

ipconfig: send host-name in DHCP requests



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 <fengguang.wu@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent 614f60fa

net/ipv4/ipconfig.c

+7 −0

Original line number	Diff line number	Diff line
		@@ -665,6 +665,13 @@ ic_dhcp_init_options(u8 *options)
		memcpy(e, ic_req_params, sizeof(ic_req_params));
		e += sizeof(ic_req_params);

		if (ic_host_name_set) {
		e++ = 12; / host-name */
		len = strlen(utsname()->nodename);
		*e++ = len;
		memcpy(e, utsname()->nodename, len);
		e += len;
		}
		if (*vendor_class_identifier) {
		printk(KERN_INFO "DHCP: sending class identifier \"%s\"\n",
		vendor_class_identifier);

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