diff options
Diffstat (limited to 'drivers/net/bonding/bond_ipv6.c')
| -rw-r--r-- | drivers/net/bonding/bond_ipv6.c | 225 |
1 files changed, 0 insertions, 225 deletions
diff --git a/drivers/net/bonding/bond_ipv6.c b/drivers/net/bonding/bond_ipv6.c deleted file mode 100644 index 027a0ee7d85..00000000000 --- a/drivers/net/bonding/bond_ipv6.c +++ /dev/null @@ -1,225 +0,0 @@ -/* - * 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); - ipv6_addr_copy(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)) - ipv6_addr_copy(&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)) - ipv6_addr_copy(&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); -} - |