+++ /dev/null
-/*
- * Copyright(c) 2008 Hewlett-Packard Development Company, L.P.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
- * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
- * for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * The full GNU General Public License is included in this distribution in the
- * file called LICENSE.
- *
- */
-
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <linux/types.h>
-#include <linux/if_vlan.h>
-#include <net/ipv6.h>
-#include <net/ndisc.h>
-#include <net/addrconf.h>
-#include <net/netns/generic.h>
-#include "bonding.h"
-
-/*
- * Assign bond->master_ipv6 to the next IPv6 address in the list, or
- * zero it out if there are none.
- */
-static void bond_glean_dev_ipv6(struct net_device *dev, struct in6_addr *addr)
-{
- struct inet6_dev *idev;
-
- if (!dev)
- return;
-
- idev = in6_dev_get(dev);
- if (!idev)
- return;
-
- read_lock_bh(&idev->lock);
- if (!list_empty(&idev->addr_list)) {
- struct inet6_ifaddr *ifa
- = list_first_entry(&idev->addr_list,
- struct inet6_ifaddr, if_list);
- *addr = ifa->addr;
- } else
- ipv6_addr_set(addr, 0, 0, 0, 0);
-
- read_unlock_bh(&idev->lock);
-
- in6_dev_put(idev);
-}
-
-static void bond_na_send(struct net_device *slave_dev,
- struct in6_addr *daddr,
- int router,
- unsigned short vlan_id)
-{
- struct in6_addr mcaddr;
- struct icmp6hdr icmp6h = {
- .icmp6_type = NDISC_NEIGHBOUR_ADVERTISEMENT,
- };
- struct sk_buff *skb;
-
- icmp6h.icmp6_router = router;
- icmp6h.icmp6_solicited = 0;
- icmp6h.icmp6_override = 1;
-
- addrconf_addr_solict_mult(daddr, &mcaddr);
-
- pr_debug("ipv6 na on slave %s: dest %pI6, src %pI6\n",
- slave_dev->name, &mcaddr, daddr);
-
- skb = ndisc_build_skb(slave_dev, &mcaddr, daddr, &icmp6h, daddr,
- ND_OPT_TARGET_LL_ADDR);
-
- if (!skb) {
- pr_err("NA packet allocation failed\n");
- return;
- }
-
- if (vlan_id) {
- /* The Ethernet header is not present yet, so it is
- * too early to insert a VLAN tag. Force use of an
- * out-of-line tag here and let dev_hard_start_xmit()
- * insert it if the slave hardware can't.
- */
- skb = __vlan_hwaccel_put_tag(skb, vlan_id);
- if (!skb) {
- pr_err("failed to insert VLAN tag\n");
- return;
- }
- }
-
- ndisc_send_skb(skb, slave_dev, NULL, &mcaddr, daddr, &icmp6h);
-}
-
-/*
- * Kick out an unsolicited Neighbor Advertisement for an IPv6 address on
- * the bonding master. This will help the switch learn our address
- * if in active-backup mode.
- *
- * Caller must hold curr_slave_lock for read or better
- */
-void bond_send_unsolicited_na(struct bonding *bond)
-{
- struct slave *slave = bond->curr_active_slave;
- struct vlan_entry *vlan;
- struct inet6_dev *idev;
- int is_router;
-
- pr_debug("%s: bond %s slave %s\n", bond->dev->name,
- __func__, slave ? slave->dev->name : "NULL");
-
- if (!slave || !bond->send_unsol_na ||
- test_bit(__LINK_STATE_LINKWATCH_PENDING, &slave->dev->state))
- return;
-
- bond->send_unsol_na--;
-
- idev = in6_dev_get(bond->dev);
- if (!idev)
- return;
-
- is_router = !!idev->cnf.forwarding;
-
- in6_dev_put(idev);
-
- if (!ipv6_addr_any(&bond->master_ipv6))
- bond_na_send(slave->dev, &bond->master_ipv6, is_router, 0);
-
- list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
- if (!ipv6_addr_any(&vlan->vlan_ipv6)) {
- bond_na_send(slave->dev, &vlan->vlan_ipv6, is_router,
- vlan->vlan_id);
- }
- }
-}
-
-/*
- * bond_inet6addr_event: handle inet6addr notifier chain events.
- *
- * We keep track of device IPv6 addresses primarily to use as source
- * addresses in NS probes.
- *
- * We track one IPv6 for the main device (if it has one).
- */
-static int bond_inet6addr_event(struct notifier_block *this,
- unsigned long event,
- void *ptr)
-{
- struct inet6_ifaddr *ifa = ptr;
- struct net_device *vlan_dev, *event_dev = ifa->idev->dev;
- struct bonding *bond;
- struct vlan_entry *vlan;
- struct bond_net *bn = net_generic(dev_net(event_dev), bond_net_id);
-
- list_for_each_entry(bond, &bn->dev_list, bond_list) {
- if (bond->dev == event_dev) {
- switch (event) {
- case NETDEV_UP:
- if (ipv6_addr_any(&bond->master_ipv6))
- bond->master_ipv6 = ifa->addr;
- return NOTIFY_OK;
- case NETDEV_DOWN:
- if (ipv6_addr_equal(&bond->master_ipv6,
- &ifa->addr))
- bond_glean_dev_ipv6(bond->dev,
- &bond->master_ipv6);
- return NOTIFY_OK;
- default:
- return NOTIFY_DONE;
- }
- }
-
- list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
- rcu_read_lock();
- vlan_dev = __vlan_find_dev_deep(bond->dev,
- vlan->vlan_id);
- rcu_read_unlock();
- if (vlan_dev == event_dev) {
- switch (event) {
- case NETDEV_UP:
- if (ipv6_addr_any(&vlan->vlan_ipv6))
- vlan->vlan_ipv6 = ifa->addr;
- return NOTIFY_OK;
- case NETDEV_DOWN:
- if (ipv6_addr_equal(&vlan->vlan_ipv6,
- &ifa->addr))
- bond_glean_dev_ipv6(vlan_dev,
- &vlan->vlan_ipv6);
- return NOTIFY_OK;
- default:
- return NOTIFY_DONE;
- }
- }
- }
- }
- return NOTIFY_DONE;
-}
-
-static struct notifier_block bond_inet6addr_notifier = {
- .notifier_call = bond_inet6addr_event,
-};
-
-void bond_register_ipv6_notifier(void)
-{
- register_inet6addr_notifier(&bond_inet6addr_notifier);
-}
-
-void bond_unregister_ipv6_notifier(void)
-{
- unregister_inet6addr_notifier(&bond_inet6addr_notifier);
-}
-
projects / can-eth-gw-linux.git / commitdiff