affects only the active-backup mode. This option was added for
bonding version 3.3.0.
+num_unsol_na
+
+ Specifies the number of unsolicited IPv6 Neighbor Advertisements
+ to be issued after a failover event. One unsolicited NA is issued
+ immediately after the failover.
+
+ The valid range is 0 - 255; the default value is 1. This option
+ affects only the active-backup mode. This option was added for
+ bonding version 3.4.0.
+
primary
A string (eth0, eth2, etc) specifying which slave is the
config BONDING
tristate "Bonding driver support"
depends on INET
+ depends on IPV6 || IPV6=n
---help---
Say 'Y' or 'M' if you wish to be able to 'bond' multiple Ethernet
Channels together. This is called 'Etherchannel' by Cisco,
bonding-objs := bond_main.o bond_3ad.o bond_alb.o bond_sysfs.o
+ipv6-$(subst m,y,$(CONFIG_IPV6)) += bond_ipv6.o
+bonding-objs += $(ipv6-y)
+
--- /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 BONDING_DEBUG 1
+
+#include <linux/types.h>
+#include <linux/if_vlan.h>
+#include <net/ipv6.h>
+#include <net/ndisc.h>
+#include <net/addrconf.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;
+ struct inet6_ifaddr *ifa;
+
+ if (!dev)
+ return;
+
+ idev = in6_dev_get(dev);
+ if (!idev)
+ return;
+
+ read_lock_bh(&idev->lock);
+ ifa = idev->addr_list;
+ if (ifa)
+ 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);
+
+ dprintk("ipv6 na on slave %s: dest %pI6, src %pI6\n",
+ slave->name, &mcaddr, daddr);
+
+ skb = ndisc_build_skb(slave_dev, &mcaddr, daddr, &icmp6h, daddr,
+ ND_OPT_TARGET_LL_ADDR);
+
+ if (!skb) {
+ printk(KERN_ERR DRV_NAME ": NA packet allocation failed\n");
+ return;
+ }
+
+ if (vlan_id) {
+ skb = vlan_put_tag(skb, vlan_id);
+ if (!skb) {
+ printk(KERN_ERR DRV_NAME ": 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;
+
+ dprintk("bond_send_unsol_na: bond %s slave %s\n", bond->dev->name,
+ 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;
+
+ if (dev_net(event_dev) != &init_net)
+ return NOTIFY_DONE;
+
+ list_for_each_entry(bond, &bond_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) {
+ vlan_dev = vlan_group_get_device(bond->vlgrp,
+ vlan->vlan_id);
+ 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);
+}
+
static int max_bonds = BOND_DEFAULT_MAX_BONDS;
static int num_grat_arp = 1;
+static int num_unsol_na = 1;
static int miimon = BOND_LINK_MON_INTERV;
static int updelay = 0;
static int downdelay = 0;
MODULE_PARM_DESC(max_bonds, "Max number of bonded devices");
module_param(num_grat_arp, int, 0644);
MODULE_PARM_DESC(num_grat_arp, "Number of gratuitous ARP packets to send on failover event");
+module_param(num_unsol_na, int, 0644);
+MODULE_PARM_DESC(num_unsol_na, "Number of unsolicited IPv6 Neighbor Advertisements packets to send on failover event");
module_param(miimon, int, 0);
MODULE_PARM_DESC(miimon, "Link check interval in milliseconds");
module_param(updelay, int, 0);
dprintk("bond: %s, vlan id %d\n",
(bond ? bond->dev->name: "None"), vlan_id);
- vlan = kmalloc(sizeof(struct vlan_entry), GFP_KERNEL);
+ vlan = kzalloc(sizeof(struct vlan_entry), GFP_KERNEL);
if (!vlan) {
return -ENOMEM;
}
INIT_LIST_HEAD(&vlan->vlan_list);
vlan->vlan_id = vlan_id;
- vlan->vlan_ip = 0;
write_lock_bh(&bond->lock);
bond->send_grat_arp = bond->params.num_grat_arp;
bond_send_gratuitous_arp(bond);
+ bond->send_unsol_na = bond->params.num_unsol_na;
+ bond_send_unsolicited_na(bond);
+
write_unlock_bh(&bond->curr_slave_lock);
read_unlock(&bond->lock);
read_unlock(&bond->curr_slave_lock);
}
+ if (bond->send_unsol_na) {
+ read_lock(&bond->curr_slave_lock);
+ bond_send_unsolicited_na(bond);
+ read_unlock(&bond->curr_slave_lock);
+ }
+
if (bond_miimon_inspect(bond)) {
read_unlock(&bond->lock);
rtnl_lock();
read_unlock(&bond->curr_slave_lock);
}
+ if (bond->send_unsol_na) {
+ read_lock(&bond->curr_slave_lock);
+ bond_send_unsolicited_na(bond);
+ read_unlock(&bond->curr_slave_lock);
+ }
+
if (bond_ab_arp_inspect(bond, delta_in_ticks)) {
read_unlock(&bond->lock);
rtnl_lock();
write_lock_bh(&bond->lock);
bond->send_grat_arp = 0;
+ bond->send_unsol_na = 0;
/* signal timers not to re-arm */
bond->kill_timers = 1;
bond->primary_slave = NULL;
bond->dev = bond_dev;
bond->send_grat_arp = 0;
+ bond->send_unsol_na = 0;
bond->setup_by_slave = 0;
INIT_LIST_HEAD(&bond->vlan_list);
num_grat_arp = 1;
}
+ if (num_unsol_na < 0 || num_unsol_na > 255) {
+ printk(KERN_WARNING DRV_NAME
+ ": Warning: num_unsol_na (%d) not in range 0-255 so it "
+ "was reset to 1 \n", num_unsol_na);
+ num_unsol_na = 1;
+ }
+
/* reset values for 802.3ad */
if (bond_mode == BOND_MODE_8023AD) {
if (!miimon) {
params->xmit_policy = xmit_hashtype;
params->miimon = miimon;
params->num_grat_arp = num_grat_arp;
+ params->num_unsol_na = num_unsol_na;
params->arp_interval = arp_interval;
params->arp_validate = arp_validate_value;
params->updelay = updelay;
register_netdevice_notifier(&bond_netdev_notifier);
register_inetaddr_notifier(&bond_inetaddr_notifier);
+ bond_register_ipv6_notifier();
goto out;
err:
{
unregister_netdevice_notifier(&bond_netdev_notifier);
unregister_inetaddr_notifier(&bond_inetaddr_notifier);
+ bond_unregister_ipv6_notifier();
bond_destroy_sysfs();
return ret;
}
static DEVICE_ATTR(num_grat_arp, S_IRUGO | S_IWUSR, bonding_show_n_grat_arp, bonding_store_n_grat_arp);
+
+/*
+ * Show and set the number of unsolicted NA's to send after a failover event.
+ */
+static ssize_t bonding_show_n_unsol_na(struct device *d,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct bonding *bond = to_bond(d);
+
+ return sprintf(buf, "%d\n", bond->params.num_unsol_na);
+}
+
+static ssize_t bonding_store_n_unsol_na(struct device *d,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ int new_value, ret = count;
+ struct bonding *bond = to_bond(d);
+
+ if (sscanf(buf, "%d", &new_value) != 1) {
+ printk(KERN_ERR DRV_NAME
+ ": %s: no num_unsol_na value specified.\n",
+ bond->dev->name);
+ ret = -EINVAL;
+ goto out;
+ }
+ if (new_value < 0 || new_value > 255) {
+ printk(KERN_ERR DRV_NAME
+ ": %s: Invalid num_unsol_na value %d not in range 0-255; rejected.\n",
+ bond->dev->name, new_value);
+ ret = -EINVAL;
+ goto out;
+ } else {
+ bond->params.num_unsol_na = new_value;
+ }
+out:
+ return ret;
+}
+static DEVICE_ATTR(num_unsol_na, S_IRUGO | S_IWUSR, bonding_show_n_unsol_na, bonding_store_n_unsol_na);
+
/*
* Show and set the MII monitor interval. There are two tricky bits
* here. First, if MII monitoring is activated, then we must disable
&dev_attr_lacp_rate.attr,
&dev_attr_xmit_hash_policy.attr,
&dev_attr_num_grat_arp.attr,
+ &dev_attr_num_unsol_na.attr,
&dev_attr_miimon.attr,
&dev_attr_primary.attr,
&dev_attr_use_carrier.attr,
#include <linux/proc_fs.h>
#include <linux/if_bonding.h>
#include <linux/kobject.h>
+#include <linux/in6.h>
#include "bond_3ad.h"
#include "bond_alb.h"
-#define DRV_VERSION "3.3.0"
-#define DRV_RELDATE "June 10, 2008"
+#define DRV_VERSION "3.4.0"
+#define DRV_RELDATE "October 7, 2008"
#define DRV_NAME "bonding"
#define DRV_DESCRIPTION "Ethernet Channel Bonding Driver"
#define BOND_MAX_ARP_TARGETS 16
+extern struct list_head bond_dev_list;
+
#ifdef BONDING_DEBUG
#define dprintk(fmt, args...) \
printk(KERN_DEBUG \
int xmit_policy;
int miimon;
int num_grat_arp;
+ int num_unsol_na;
int arp_interval;
int arp_validate;
int use_carrier;
struct list_head vlan_list;
__be32 vlan_ip;
unsigned short vlan_id;
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+ struct in6_addr vlan_ipv6;
+#endif
};
struct slave {
rwlock_t curr_slave_lock;
s8 kill_timers;
s8 send_grat_arp;
+ s8 send_unsol_na;
s8 setup_by_slave;
struct net_device_stats stats;
#ifdef CONFIG_PROC_FS
struct delayed_work arp_work;
struct delayed_work alb_work;
struct delayed_work ad_work;
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+ struct in6_addr master_ipv6;
+#endif
};
/**
extern struct bond_parm_tbl arp_validate_tbl[];
extern struct bond_parm_tbl fail_over_mac_tbl[];
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+void bond_send_unsolicited_na(struct bonding *bond);
+void bond_register_ipv6_notifier(void);
+void bond_unregister_ipv6_notifier(void);
+#else
+static inline void bond_send_unsolicited_na(struct bonding *bond)
+{
+ return;
+}
+static inline void bond_register_ipv6_notifier(void)
+{
+ return;
+}
+static inline void bond_unregister_ipv6_notifier(void)
+{
+ return;
+}
+#endif
+
#endif /* _LINUX_BONDING_H */
extern int ndisc_mc_map(struct in6_addr *addr, char *buf, struct net_device *dev, int dir);
+extern struct sk_buff *ndisc_build_skb(struct net_device *dev,
+ const struct in6_addr *daddr,
+ const struct in6_addr *saddr,
+ struct icmp6hdr *icmp6h,
+ const struct in6_addr *target,
+ int llinfo);
+
+extern void ndisc_send_skb(struct sk_buff *skb,
+ struct net_device *dev,
+ struct neighbour *neigh,
+ const struct in6_addr *daddr,
+ const struct in6_addr *saddr,
+ struct icmp6hdr *icmp6h);
+
/*
ipv6_dev_mc_dec(dev, &maddr);
}
-/*
- * Send a Neighbour Advertisement
- */
-static void __ndisc_send(struct net_device *dev,
- struct neighbour *neigh,
- const struct in6_addr *daddr,
- const struct in6_addr *saddr,
- struct icmp6hdr *icmp6h, const struct in6_addr *target,
- int llinfo)
+struct sk_buff *ndisc_build_skb(struct net_device *dev,
+ const struct in6_addr *daddr,
+ const struct in6_addr *saddr,
+ struct icmp6hdr *icmp6h,
+ const struct in6_addr *target,
+ int llinfo)
{
- struct flowi fl;
- struct dst_entry *dst;
struct net *net = dev_net(dev);
struct sock *sk = net->ipv6.ndisc_sk;
struct sk_buff *skb;
struct icmp6hdr *hdr;
- struct inet6_dev *idev;
int len;
int err;
- u8 *opt, type;
-
- type = icmp6h->icmp6_type;
-
- icmpv6_flow_init(sk, &fl, type, saddr, daddr, dev->ifindex);
-
- dst = icmp6_dst_alloc(dev, neigh, daddr);
- if (!dst)
- return;
-
- err = xfrm_lookup(&dst, &fl, NULL, 0);
- if (err < 0)
- return;
+ u8 *opt;
if (!dev->addr_len)
llinfo = 0;
ND_PRINTK0(KERN_ERR
"ICMPv6 ND: %s() failed to allocate an skb.\n",
__func__);
- dst_release(dst);
- return;
+ return NULL;
}
skb_reserve(skb, LL_RESERVED_SPACE(dev));
csum_partial((__u8 *) hdr,
len, 0));
+ return skb;
+}
+
+EXPORT_SYMBOL(ndisc_build_skb);
+
+void ndisc_send_skb(struct sk_buff *skb,
+ struct net_device *dev,
+ struct neighbour *neigh,
+ const struct in6_addr *daddr,
+ const struct in6_addr *saddr,
+ struct icmp6hdr *icmp6h)
+{
+ struct flowi fl;
+ struct dst_entry *dst;
+ struct net *net = dev_net(dev);
+ struct sock *sk = net->ipv6.ndisc_sk;
+ struct inet6_dev *idev;
+ int err;
+ u8 type;
+
+ type = icmp6h->icmp6_type;
+
+ icmpv6_flow_init(sk, &fl, type, saddr, daddr, dev->ifindex);
+
+ dst = icmp6_dst_alloc(dev, neigh, daddr);
+ if (!dst) {
+ kfree_skb(skb);
+ return;
+ }
+
+ err = xfrm_lookup(&dst, &fl, NULL, 0);
+ if (err < 0) {
+ kfree_skb(skb);
+ return;
+ }
+
skb->dst = dst;
idev = in6_dev_get(dst->dev);
in6_dev_put(idev);
}
+EXPORT_SYMBOL(ndisc_send_skb);
+
+/*
+ * Send a Neighbour Discover packet
+ */
+static void __ndisc_send(struct net_device *dev,
+ struct neighbour *neigh,
+ const struct in6_addr *daddr,
+ const struct in6_addr *saddr,
+ struct icmp6hdr *icmp6h, const struct in6_addr *target,
+ int llinfo)
+{
+ struct sk_buff *skb;
+
+ skb = ndisc_build_skb(dev, daddr, saddr, icmp6h, target, llinfo);
+ if (!skb)
+ return;
+
+ ndisc_send_skb(skb, dev, neigh, daddr, saddr, icmp6h);
+}
+
static void ndisc_send_na(struct net_device *dev, struct neighbour *neigh,
const struct in6_addr *daddr,
const struct in6_addr *solicited_addr,
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