2 * originally based on the dummy device.
4 * Copyright 1999, Thomas Davis, tadavis@lbl.gov.
5 * Licensed under the GPL. Based on dummy.c, and eql.c devices.
7 * bonding.c: an Ethernet Bonding driver
9 * This is useful to talk to a Cisco EtherChannel compatible equipment:
11 * Sun Trunking (Solaris)
12 * Alteon AceDirector Trunks
14 * and probably many L2 switches ...
17 * ifconfig bond0 ipaddress netmask up
18 * will setup a network device, with an ip address. No mac address
19 * will be assigned at this time. The hw mac address will come from
20 * the first slave bonded to the channel. All slaves will then use
21 * this hw mac address.
24 * will release all slaves, marking them as down.
26 * ifenslave bond0 eth0
27 * will attach eth0 to bond0 as a slave. eth0 hw mac address will either
28 * a: be used as initial mac address
29 * b: if a hw mac address already is there, eth0's hw mac address
30 * will then be set from bond0.
34 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
36 #include <linux/kernel.h>
37 #include <linux/module.h>
38 #include <linux/types.h>
39 #include <linux/fcntl.h>
40 #include <linux/interrupt.h>
41 #include <linux/ptrace.h>
42 #include <linux/ioport.h>
46 #include <linux/tcp.h>
47 #include <linux/udp.h>
48 #include <linux/slab.h>
49 #include <linux/string.h>
50 #include <linux/init.h>
51 #include <linux/timer.h>
52 #include <linux/socket.h>
53 #include <linux/ctype.h>
54 #include <linux/inet.h>
55 #include <linux/bitops.h>
57 #include <asm/system.h>
59 #include <linux/uaccess.h>
60 #include <linux/errno.h>
61 #include <linux/netdevice.h>
62 #include <linux/inetdevice.h>
63 #include <linux/igmp.h>
64 #include <linux/etherdevice.h>
65 #include <linux/skbuff.h>
67 #include <linux/rtnetlink.h>
68 #include <linux/smp.h>
69 #include <linux/if_ether.h>
71 #include <linux/mii.h>
72 #include <linux/ethtool.h>
73 #include <linux/if_vlan.h>
74 #include <linux/if_bonding.h>
75 #include <linux/jiffies.h>
76 #include <linux/preempt.h>
77 #include <net/route.h>
78 #include <net/net_namespace.h>
79 #include <net/netns/generic.h>
80 #include <net/pkt_sched.h>
85 /*---------------------------- Module parameters ----------------------------*/
87 /* monitor all links that often (in milliseconds). <=0 disables monitoring */
88 #define BOND_LINK_MON_INTERV 0
89 #define BOND_LINK_ARP_INTERV 0
91 static int max_bonds = BOND_DEFAULT_MAX_BONDS;
92 static int tx_queues = BOND_DEFAULT_TX_QUEUES;
93 static int num_peer_notif = 1;
94 static int miimon = BOND_LINK_MON_INTERV;
97 static int use_carrier = 1;
100 static char *primary_reselect;
101 static char *lacp_rate;
102 static int min_links;
103 static char *ad_select;
104 static char *xmit_hash_policy;
105 static int arp_interval = BOND_LINK_ARP_INTERV;
106 static char *arp_ip_target[BOND_MAX_ARP_TARGETS];
107 static char *arp_validate;
108 static char *fail_over_mac;
109 static int all_slaves_active = 0;
110 static struct bond_params bonding_defaults;
111 static int resend_igmp = BOND_DEFAULT_RESEND_IGMP;
113 module_param(max_bonds, int, 0);
114 MODULE_PARM_DESC(max_bonds, "Max number of bonded devices");
115 module_param(tx_queues, int, 0);
116 MODULE_PARM_DESC(tx_queues, "Max number of transmit queues (default = 16)");
117 module_param_named(num_grat_arp, num_peer_notif, int, 0644);
118 MODULE_PARM_DESC(num_grat_arp, "Number of peer notifications to send on "
119 "failover event (alias of num_unsol_na)");
120 module_param_named(num_unsol_na, num_peer_notif, int, 0644);
121 MODULE_PARM_DESC(num_unsol_na, "Number of peer notifications to send on "
122 "failover event (alias of num_grat_arp)");
123 module_param(miimon, int, 0);
124 MODULE_PARM_DESC(miimon, "Link check interval in milliseconds");
125 module_param(updelay, int, 0);
126 MODULE_PARM_DESC(updelay, "Delay before considering link up, in milliseconds");
127 module_param(downdelay, int, 0);
128 MODULE_PARM_DESC(downdelay, "Delay before considering link down, "
130 module_param(use_carrier, int, 0);
131 MODULE_PARM_DESC(use_carrier, "Use netif_carrier_ok (vs MII ioctls) in miimon; "
132 "0 for off, 1 for on (default)");
133 module_param(mode, charp, 0);
134 MODULE_PARM_DESC(mode, "Mode of operation; 0 for balance-rr, "
135 "1 for active-backup, 2 for balance-xor, "
136 "3 for broadcast, 4 for 802.3ad, 5 for balance-tlb, "
137 "6 for balance-alb");
138 module_param(primary, charp, 0);
139 MODULE_PARM_DESC(primary, "Primary network device to use");
140 module_param(primary_reselect, charp, 0);
141 MODULE_PARM_DESC(primary_reselect, "Reselect primary slave "
143 "0 for always (default), "
144 "1 for only if speed of primary is "
146 "2 for only on active slave "
148 module_param(lacp_rate, charp, 0);
149 MODULE_PARM_DESC(lacp_rate, "LACPDU tx rate to request from 802.3ad partner; "
150 "0 for slow, 1 for fast");
151 module_param(ad_select, charp, 0);
152 MODULE_PARM_DESC(ad_select, "803.ad aggregation selection logic; "
153 "0 for stable (default), 1 for bandwidth, "
155 module_param(min_links, int, 0);
156 MODULE_PARM_DESC(min_links, "Minimum number of available links before turning on carrier");
158 module_param(xmit_hash_policy, charp, 0);
159 MODULE_PARM_DESC(xmit_hash_policy, "balance-xor and 802.3ad hashing method; "
160 "0 for layer 2 (default), 1 for layer 3+4, "
162 module_param(arp_interval, int, 0);
163 MODULE_PARM_DESC(arp_interval, "arp interval in milliseconds");
164 module_param_array(arp_ip_target, charp, NULL, 0);
165 MODULE_PARM_DESC(arp_ip_target, "arp targets in n.n.n.n form");
166 module_param(arp_validate, charp, 0);
167 MODULE_PARM_DESC(arp_validate, "validate src/dst of ARP probes; "
168 "0 for none (default), 1 for active, "
169 "2 for backup, 3 for all");
170 module_param(fail_over_mac, charp, 0);
171 MODULE_PARM_DESC(fail_over_mac, "For active-backup, do not set all slaves to "
172 "the same MAC; 0 for none (default), "
173 "1 for active, 2 for follow");
174 module_param(all_slaves_active, int, 0);
175 MODULE_PARM_DESC(all_slaves_active, "Keep all frames received on an interface"
176 "by setting active flag for all slaves; "
177 "0 for never (default), 1 for always.");
178 module_param(resend_igmp, int, 0);
179 MODULE_PARM_DESC(resend_igmp, "Number of IGMP membership reports to send on "
182 /*----------------------------- Global variables ----------------------------*/
184 #ifdef CONFIG_NET_POLL_CONTROLLER
185 atomic_t netpoll_block_tx = ATOMIC_INIT(0);
188 int bond_net_id __read_mostly;
190 static __be32 arp_target[BOND_MAX_ARP_TARGETS];
191 static int arp_ip_count;
192 static int bond_mode = BOND_MODE_ROUNDROBIN;
193 static int xmit_hashtype = BOND_XMIT_POLICY_LAYER2;
194 static int lacp_fast;
196 const struct bond_parm_tbl bond_lacp_tbl[] = {
197 { "slow", AD_LACP_SLOW},
198 { "fast", AD_LACP_FAST},
202 const struct bond_parm_tbl bond_mode_tbl[] = {
203 { "balance-rr", BOND_MODE_ROUNDROBIN},
204 { "active-backup", BOND_MODE_ACTIVEBACKUP},
205 { "balance-xor", BOND_MODE_XOR},
206 { "broadcast", BOND_MODE_BROADCAST},
207 { "802.3ad", BOND_MODE_8023AD},
208 { "balance-tlb", BOND_MODE_TLB},
209 { "balance-alb", BOND_MODE_ALB},
213 const struct bond_parm_tbl xmit_hashtype_tbl[] = {
214 { "layer2", BOND_XMIT_POLICY_LAYER2},
215 { "layer3+4", BOND_XMIT_POLICY_LAYER34},
216 { "layer2+3", BOND_XMIT_POLICY_LAYER23},
220 const struct bond_parm_tbl arp_validate_tbl[] = {
221 { "none", BOND_ARP_VALIDATE_NONE},
222 { "active", BOND_ARP_VALIDATE_ACTIVE},
223 { "backup", BOND_ARP_VALIDATE_BACKUP},
224 { "all", BOND_ARP_VALIDATE_ALL},
228 const struct bond_parm_tbl fail_over_mac_tbl[] = {
229 { "none", BOND_FOM_NONE},
230 { "active", BOND_FOM_ACTIVE},
231 { "follow", BOND_FOM_FOLLOW},
235 const struct bond_parm_tbl pri_reselect_tbl[] = {
236 { "always", BOND_PRI_RESELECT_ALWAYS},
237 { "better", BOND_PRI_RESELECT_BETTER},
238 { "failure", BOND_PRI_RESELECT_FAILURE},
242 struct bond_parm_tbl ad_select_tbl[] = {
243 { "stable", BOND_AD_STABLE},
244 { "bandwidth", BOND_AD_BANDWIDTH},
245 { "count", BOND_AD_COUNT},
249 /*-------------------------- Forward declarations ---------------------------*/
251 static int bond_init(struct net_device *bond_dev);
252 static void bond_uninit(struct net_device *bond_dev);
254 /*---------------------------- General routines -----------------------------*/
256 const char *bond_mode_name(int mode)
258 static const char *names[] = {
259 [BOND_MODE_ROUNDROBIN] = "load balancing (round-robin)",
260 [BOND_MODE_ACTIVEBACKUP] = "fault-tolerance (active-backup)",
261 [BOND_MODE_XOR] = "load balancing (xor)",
262 [BOND_MODE_BROADCAST] = "fault-tolerance (broadcast)",
263 [BOND_MODE_8023AD] = "IEEE 802.3ad Dynamic link aggregation",
264 [BOND_MODE_TLB] = "transmit load balancing",
265 [BOND_MODE_ALB] = "adaptive load balancing",
268 if (mode < 0 || mode > BOND_MODE_ALB)
274 /*---------------------------------- VLAN -----------------------------------*/
277 * bond_add_vlan - add a new vlan id on bond
278 * @bond: bond that got the notification
279 * @vlan_id: the vlan id to add
281 * Returns -ENOMEM if allocation failed.
283 static int bond_add_vlan(struct bonding *bond, unsigned short vlan_id)
285 struct vlan_entry *vlan;
287 pr_debug("bond: %s, vlan id %d\n",
288 (bond ? bond->dev->name : "None"), vlan_id);
290 vlan = kzalloc(sizeof(struct vlan_entry), GFP_KERNEL);
294 INIT_LIST_HEAD(&vlan->vlan_list);
295 vlan->vlan_id = vlan_id;
297 write_lock_bh(&bond->lock);
299 list_add_tail(&vlan->vlan_list, &bond->vlan_list);
301 write_unlock_bh(&bond->lock);
303 pr_debug("added VLAN ID %d on bond %s\n", vlan_id, bond->dev->name);
309 * bond_del_vlan - delete a vlan id from bond
310 * @bond: bond that got the notification
311 * @vlan_id: the vlan id to delete
313 * returns -ENODEV if @vlan_id was not found in @bond.
315 static int bond_del_vlan(struct bonding *bond, unsigned short vlan_id)
317 struct vlan_entry *vlan;
320 pr_debug("bond: %s, vlan id %d\n", bond->dev->name, vlan_id);
323 write_lock_bh(&bond->lock);
325 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
326 if (vlan->vlan_id == vlan_id) {
327 list_del(&vlan->vlan_list);
329 if (bond_is_lb(bond))
330 bond_alb_clear_vlan(bond, vlan_id);
332 pr_debug("removed VLAN ID %d from bond %s\n",
333 vlan_id, bond->dev->name);
342 pr_debug("couldn't find VLAN ID %d in bond %s\n",
343 vlan_id, bond->dev->name);
346 write_unlock_bh(&bond->lock);
347 unblock_netpoll_tx();
352 * bond_next_vlan - safely skip to the next item in the vlans list.
353 * @bond: the bond we're working on
354 * @curr: item we're advancing from
356 * Returns %NULL if list is empty, bond->next_vlan if @curr is %NULL,
357 * or @curr->next otherwise (even if it is @curr itself again).
359 * Caller must hold bond->lock
361 struct vlan_entry *bond_next_vlan(struct bonding *bond, struct vlan_entry *curr)
363 struct vlan_entry *next, *last;
365 if (list_empty(&bond->vlan_list))
369 next = list_entry(bond->vlan_list.next,
370 struct vlan_entry, vlan_list);
372 last = list_entry(bond->vlan_list.prev,
373 struct vlan_entry, vlan_list);
375 next = list_entry(bond->vlan_list.next,
376 struct vlan_entry, vlan_list);
378 next = list_entry(curr->vlan_list.next,
379 struct vlan_entry, vlan_list);
387 * bond_dev_queue_xmit - Prepare skb for xmit.
389 * @bond: bond device that got this skb for tx.
390 * @skb: hw accel VLAN tagged skb to transmit
391 * @slave_dev: slave that is supposed to xmit this skbuff
393 int bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb,
394 struct net_device *slave_dev)
396 skb->dev = slave_dev;
398 BUILD_BUG_ON(sizeof(skb->queue_mapping) !=
399 sizeof(qdisc_skb_cb(skb)->bond_queue_mapping));
400 skb->queue_mapping = qdisc_skb_cb(skb)->bond_queue_mapping;
402 if (unlikely(netpoll_tx_running(slave_dev)))
403 bond_netpoll_send_skb(bond_get_slave_by_dev(bond, slave_dev), skb);
411 * In the following 2 functions, bond_vlan_rx_add_vid and bond_vlan_rx_kill_vid,
412 * We don't protect the slave list iteration with a lock because:
413 * a. This operation is performed in IOCTL context,
414 * b. The operation is protected by the RTNL semaphore in the 8021q code,
415 * c. Holding a lock with BH disabled while directly calling a base driver
416 * entry point is generally a BAD idea.
418 * The design of synchronization/protection for this operation in the 8021q
419 * module is good for one or more VLAN devices over a single physical device
420 * and cannot be extended for a teaming solution like bonding, so there is a
421 * potential race condition here where a net device from the vlan group might
422 * be referenced (either by a base driver or the 8021q code) while it is being
423 * removed from the system. However, it turns out we're not making matters
424 * worse, and if it works for regular VLAN usage it will work here too.
428 * bond_vlan_rx_add_vid - Propagates adding an id to slaves
429 * @bond_dev: bonding net device that got called
430 * @vid: vlan id being added
432 static void bond_vlan_rx_add_vid(struct net_device *bond_dev, uint16_t vid)
434 struct bonding *bond = netdev_priv(bond_dev);
438 bond_for_each_slave(bond, slave, i) {
439 struct net_device *slave_dev = slave->dev;
440 const struct net_device_ops *slave_ops = slave_dev->netdev_ops;
442 if ((slave_dev->features & NETIF_F_HW_VLAN_FILTER) &&
443 slave_ops->ndo_vlan_rx_add_vid) {
444 slave_ops->ndo_vlan_rx_add_vid(slave_dev, vid);
448 res = bond_add_vlan(bond, vid);
450 pr_err("%s: Error: Failed to add vlan id %d\n",
451 bond_dev->name, vid);
456 * bond_vlan_rx_kill_vid - Propagates deleting an id to slaves
457 * @bond_dev: bonding net device that got called
458 * @vid: vlan id being removed
460 static void bond_vlan_rx_kill_vid(struct net_device *bond_dev, uint16_t vid)
462 struct bonding *bond = netdev_priv(bond_dev);
466 bond_for_each_slave(bond, slave, i) {
467 struct net_device *slave_dev = slave->dev;
468 const struct net_device_ops *slave_ops = slave_dev->netdev_ops;
470 if ((slave_dev->features & NETIF_F_HW_VLAN_FILTER) &&
471 slave_ops->ndo_vlan_rx_kill_vid) {
472 slave_ops->ndo_vlan_rx_kill_vid(slave_dev, vid);
476 res = bond_del_vlan(bond, vid);
478 pr_err("%s: Error: Failed to remove vlan id %d\n",
479 bond_dev->name, vid);
483 static void bond_add_vlans_on_slave(struct bonding *bond, struct net_device *slave_dev)
485 struct vlan_entry *vlan;
486 const struct net_device_ops *slave_ops = slave_dev->netdev_ops;
488 if (!(slave_dev->features & NETIF_F_HW_VLAN_FILTER) ||
489 !(slave_ops->ndo_vlan_rx_add_vid))
492 list_for_each_entry(vlan, &bond->vlan_list, vlan_list)
493 slave_ops->ndo_vlan_rx_add_vid(slave_dev, vlan->vlan_id);
496 static void bond_del_vlans_from_slave(struct bonding *bond,
497 struct net_device *slave_dev)
499 const struct net_device_ops *slave_ops = slave_dev->netdev_ops;
500 struct vlan_entry *vlan;
502 if (!(slave_dev->features & NETIF_F_HW_VLAN_FILTER) ||
503 !(slave_ops->ndo_vlan_rx_kill_vid))
506 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
509 slave_ops->ndo_vlan_rx_kill_vid(slave_dev, vlan->vlan_id);
513 /*------------------------------- Link status -------------------------------*/
516 * Set the carrier state for the master according to the state of its
517 * slaves. If any slaves are up, the master is up. In 802.3ad mode,
518 * do special 802.3ad magic.
520 * Returns zero if carrier state does not change, nonzero if it does.
522 static int bond_set_carrier(struct bonding *bond)
527 if (bond->slave_cnt == 0)
530 if (bond->params.mode == BOND_MODE_8023AD)
531 return bond_3ad_set_carrier(bond);
533 bond_for_each_slave(bond, slave, i) {
534 if (slave->link == BOND_LINK_UP) {
535 if (!netif_carrier_ok(bond->dev)) {
536 netif_carrier_on(bond->dev);
544 if (netif_carrier_ok(bond->dev)) {
545 netif_carrier_off(bond->dev);
552 * Get link speed and duplex from the slave's base driver
553 * using ethtool. If for some reason the call fails or the
554 * values are invalid, set speed and duplex to -1,
557 static int bond_update_speed_duplex(struct slave *slave)
559 struct net_device *slave_dev = slave->dev;
560 struct ethtool_cmd ecmd;
564 slave->speed = SPEED_UNKNOWN;
565 slave->duplex = DUPLEX_UNKNOWN;
567 res = __ethtool_get_settings(slave_dev, &ecmd);
571 slave_speed = ethtool_cmd_speed(&ecmd);
572 if (slave_speed == 0 || slave_speed == ((__u32) -1))
575 switch (ecmd.duplex) {
583 slave->speed = slave_speed;
584 slave->duplex = ecmd.duplex;
590 * if <dev> supports MII link status reporting, check its link status.
592 * We either do MII/ETHTOOL ioctls, or check netif_carrier_ok(),
593 * depending upon the setting of the use_carrier parameter.
595 * Return either BMSR_LSTATUS, meaning that the link is up (or we
596 * can't tell and just pretend it is), or 0, meaning that the link is
599 * If reporting is non-zero, instead of faking link up, return -1 if
600 * both ETHTOOL and MII ioctls fail (meaning the device does not
601 * support them). If use_carrier is set, return whatever it says.
602 * It'd be nice if there was a good way to tell if a driver supports
603 * netif_carrier, but there really isn't.
605 static int bond_check_dev_link(struct bonding *bond,
606 struct net_device *slave_dev, int reporting)
608 const struct net_device_ops *slave_ops = slave_dev->netdev_ops;
609 int (*ioctl)(struct net_device *, struct ifreq *, int);
611 struct mii_ioctl_data *mii;
613 if (!reporting && !netif_running(slave_dev))
616 if (bond->params.use_carrier)
617 return netif_carrier_ok(slave_dev) ? BMSR_LSTATUS : 0;
619 /* Try to get link status using Ethtool first. */
620 if (slave_dev->ethtool_ops) {
621 if (slave_dev->ethtool_ops->get_link) {
624 link = slave_dev->ethtool_ops->get_link(slave_dev);
626 return link ? BMSR_LSTATUS : 0;
630 /* Ethtool can't be used, fallback to MII ioctls. */
631 ioctl = slave_ops->ndo_do_ioctl;
633 /* TODO: set pointer to correct ioctl on a per team member */
634 /* bases to make this more efficient. that is, once */
635 /* we determine the correct ioctl, we will always */
636 /* call it and not the others for that team */
640 * We cannot assume that SIOCGMIIPHY will also read a
641 * register; not all network drivers (e.g., e100)
645 /* Yes, the mii is overlaid on the ifreq.ifr_ifru */
646 strncpy(ifr.ifr_name, slave_dev->name, IFNAMSIZ);
648 if (IOCTL(slave_dev, &ifr, SIOCGMIIPHY) == 0) {
649 mii->reg_num = MII_BMSR;
650 if (IOCTL(slave_dev, &ifr, SIOCGMIIREG) == 0)
651 return mii->val_out & BMSR_LSTATUS;
656 * If reporting, report that either there's no dev->do_ioctl,
657 * or both SIOCGMIIREG and get_link failed (meaning that we
658 * cannot report link status). If not reporting, pretend
661 return reporting ? -1 : BMSR_LSTATUS;
664 /*----------------------------- Multicast list ------------------------------*/
667 * Push the promiscuity flag down to appropriate slaves
669 static int bond_set_promiscuity(struct bonding *bond, int inc)
672 if (USES_PRIMARY(bond->params.mode)) {
673 /* write lock already acquired */
674 if (bond->curr_active_slave) {
675 err = dev_set_promiscuity(bond->curr_active_slave->dev,
681 bond_for_each_slave(bond, slave, i) {
682 err = dev_set_promiscuity(slave->dev, inc);
691 * Push the allmulti flag down to all slaves
693 static int bond_set_allmulti(struct bonding *bond, int inc)
696 if (USES_PRIMARY(bond->params.mode)) {
697 /* write lock already acquired */
698 if (bond->curr_active_slave) {
699 err = dev_set_allmulti(bond->curr_active_slave->dev,
705 bond_for_each_slave(bond, slave, i) {
706 err = dev_set_allmulti(slave->dev, inc);
715 * Add a Multicast address to slaves
718 static void bond_mc_add(struct bonding *bond, void *addr)
720 if (USES_PRIMARY(bond->params.mode)) {
721 /* write lock already acquired */
722 if (bond->curr_active_slave)
723 dev_mc_add(bond->curr_active_slave->dev, addr);
728 bond_for_each_slave(bond, slave, i)
729 dev_mc_add(slave->dev, addr);
734 * Remove a multicast address from slave
737 static void bond_mc_del(struct bonding *bond, void *addr)
739 if (USES_PRIMARY(bond->params.mode)) {
740 /* write lock already acquired */
741 if (bond->curr_active_slave)
742 dev_mc_del(bond->curr_active_slave->dev, addr);
746 bond_for_each_slave(bond, slave, i) {
747 dev_mc_del(slave->dev, addr);
753 static void __bond_resend_igmp_join_requests(struct net_device *dev)
755 struct in_device *in_dev;
758 in_dev = __in_dev_get_rcu(dev);
760 ip_mc_rejoin_groups(in_dev);
765 * Retrieve the list of registered multicast addresses for the bonding
766 * device and retransmit an IGMP JOIN request to the current active
769 static void bond_resend_igmp_join_requests(struct bonding *bond)
771 struct net_device *vlan_dev;
772 struct vlan_entry *vlan;
774 read_lock(&bond->lock);
776 /* rejoin all groups on bond device */
777 __bond_resend_igmp_join_requests(bond->dev);
779 /* rejoin all groups on vlan devices */
780 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
782 vlan_dev = __vlan_find_dev_deep(bond->dev,
786 __bond_resend_igmp_join_requests(vlan_dev);
789 if (--bond->igmp_retrans > 0)
790 queue_delayed_work(bond->wq, &bond->mcast_work, HZ/5);
792 read_unlock(&bond->lock);
795 static void bond_resend_igmp_join_requests_delayed(struct work_struct *work)
797 struct bonding *bond = container_of(work, struct bonding,
799 bond_resend_igmp_join_requests(bond);
803 * flush all members of flush->mc_list from device dev->mc_list
805 static void bond_mc_list_flush(struct net_device *bond_dev,
806 struct net_device *slave_dev)
808 struct bonding *bond = netdev_priv(bond_dev);
809 struct netdev_hw_addr *ha;
811 netdev_for_each_mc_addr(ha, bond_dev)
812 dev_mc_del(slave_dev, ha->addr);
814 if (bond->params.mode == BOND_MODE_8023AD) {
815 /* del lacpdu mc addr from mc list */
816 u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR;
818 dev_mc_del(slave_dev, lacpdu_multicast);
822 /*--------------------------- Active slave change ---------------------------*/
825 * Update the mc list and multicast-related flags for the new and
826 * old active slaves (if any) according to the multicast mode, and
827 * promiscuous flags unconditionally.
829 static void bond_mc_swap(struct bonding *bond, struct slave *new_active,
830 struct slave *old_active)
832 struct netdev_hw_addr *ha;
834 if (!USES_PRIMARY(bond->params.mode))
835 /* nothing to do - mc list is already up-to-date on
841 if (bond->dev->flags & IFF_PROMISC)
842 dev_set_promiscuity(old_active->dev, -1);
844 if (bond->dev->flags & IFF_ALLMULTI)
845 dev_set_allmulti(old_active->dev, -1);
847 netdev_for_each_mc_addr(ha, bond->dev)
848 dev_mc_del(old_active->dev, ha->addr);
852 /* FIXME: Signal errors upstream. */
853 if (bond->dev->flags & IFF_PROMISC)
854 dev_set_promiscuity(new_active->dev, 1);
856 if (bond->dev->flags & IFF_ALLMULTI)
857 dev_set_allmulti(new_active->dev, 1);
859 netdev_for_each_mc_addr(ha, bond->dev)
860 dev_mc_add(new_active->dev, ha->addr);
865 * bond_do_fail_over_mac
867 * Perform special MAC address swapping for fail_over_mac settings
869 * Called with RTNL, bond->lock for read, curr_slave_lock for write_bh.
871 static void bond_do_fail_over_mac(struct bonding *bond,
872 struct slave *new_active,
873 struct slave *old_active)
874 __releases(&bond->curr_slave_lock)
875 __releases(&bond->lock)
876 __acquires(&bond->lock)
877 __acquires(&bond->curr_slave_lock)
879 u8 tmp_mac[ETH_ALEN];
880 struct sockaddr saddr;
883 switch (bond->params.fail_over_mac) {
884 case BOND_FOM_ACTIVE:
886 memcpy(bond->dev->dev_addr, new_active->dev->dev_addr,
887 new_active->dev->addr_len);
889 case BOND_FOM_FOLLOW:
891 * if new_active && old_active, swap them
892 * if just old_active, do nothing (going to no active slave)
893 * if just new_active, set new_active to bond's MAC
898 write_unlock_bh(&bond->curr_slave_lock);
899 read_unlock(&bond->lock);
902 memcpy(tmp_mac, new_active->dev->dev_addr, ETH_ALEN);
903 memcpy(saddr.sa_data, old_active->dev->dev_addr,
905 saddr.sa_family = new_active->dev->type;
907 memcpy(saddr.sa_data, bond->dev->dev_addr, ETH_ALEN);
908 saddr.sa_family = bond->dev->type;
911 rv = dev_set_mac_address(new_active->dev, &saddr);
913 pr_err("%s: Error %d setting MAC of slave %s\n",
914 bond->dev->name, -rv, new_active->dev->name);
921 memcpy(saddr.sa_data, tmp_mac, ETH_ALEN);
922 saddr.sa_family = old_active->dev->type;
924 rv = dev_set_mac_address(old_active->dev, &saddr);
926 pr_err("%s: Error %d setting MAC of slave %s\n",
927 bond->dev->name, -rv, new_active->dev->name);
929 read_lock(&bond->lock);
930 write_lock_bh(&bond->curr_slave_lock);
933 pr_err("%s: bond_do_fail_over_mac impossible: bad policy %d\n",
934 bond->dev->name, bond->params.fail_over_mac);
940 static bool bond_should_change_active(struct bonding *bond)
942 struct slave *prim = bond->primary_slave;
943 struct slave *curr = bond->curr_active_slave;
945 if (!prim || !curr || curr->link != BOND_LINK_UP)
947 if (bond->force_primary) {
948 bond->force_primary = false;
951 if (bond->params.primary_reselect == BOND_PRI_RESELECT_BETTER &&
952 (prim->speed < curr->speed ||
953 (prim->speed == curr->speed && prim->duplex <= curr->duplex)))
955 if (bond->params.primary_reselect == BOND_PRI_RESELECT_FAILURE)
961 * find_best_interface - select the best available slave to be the active one
962 * @bond: our bonding struct
964 * Warning: Caller must hold curr_slave_lock for writing.
966 static struct slave *bond_find_best_slave(struct bonding *bond)
968 struct slave *new_active, *old_active;
969 struct slave *bestslave = NULL;
970 int mintime = bond->params.updelay;
973 new_active = bond->curr_active_slave;
975 if (!new_active) { /* there were no active slaves left */
976 if (bond->slave_cnt > 0) /* found one slave */
977 new_active = bond->first_slave;
979 return NULL; /* still no slave, return NULL */
982 if ((bond->primary_slave) &&
983 bond->primary_slave->link == BOND_LINK_UP &&
984 bond_should_change_active(bond)) {
985 new_active = bond->primary_slave;
988 /* remember where to stop iterating over the slaves */
989 old_active = new_active;
991 bond_for_each_slave_from(bond, new_active, i, old_active) {
992 if (new_active->link == BOND_LINK_UP) {
994 } else if (new_active->link == BOND_LINK_BACK &&
995 IS_UP(new_active->dev)) {
996 /* link up, but waiting for stabilization */
997 if (new_active->delay < mintime) {
998 mintime = new_active->delay;
999 bestslave = new_active;
1007 static bool bond_should_notify_peers(struct bonding *bond)
1009 struct slave *slave = bond->curr_active_slave;
1011 pr_debug("bond_should_notify_peers: bond %s slave %s\n",
1012 bond->dev->name, slave ? slave->dev->name : "NULL");
1014 if (!slave || !bond->send_peer_notif ||
1015 test_bit(__LINK_STATE_LINKWATCH_PENDING, &slave->dev->state))
1018 bond->send_peer_notif--;
1023 * change_active_interface - change the active slave into the specified one
1024 * @bond: our bonding struct
1025 * @new: the new slave to make the active one
1027 * Set the new slave to the bond's settings and unset them on the old
1028 * curr_active_slave.
1029 * Setting include flags, mc-list, promiscuity, allmulti, etc.
1031 * If @new's link state is %BOND_LINK_BACK we'll set it to %BOND_LINK_UP,
1032 * because it is apparently the best available slave we have, even though its
1033 * updelay hasn't timed out yet.
1035 * If new_active is not NULL, caller must hold bond->lock for read and
1036 * curr_slave_lock for write_bh.
1038 void bond_change_active_slave(struct bonding *bond, struct slave *new_active)
1040 struct slave *old_active = bond->curr_active_slave;
1042 if (old_active == new_active)
1046 new_active->jiffies = jiffies;
1048 if (new_active->link == BOND_LINK_BACK) {
1049 if (USES_PRIMARY(bond->params.mode)) {
1050 pr_info("%s: making interface %s the new active one %d ms earlier.\n",
1051 bond->dev->name, new_active->dev->name,
1052 (bond->params.updelay - new_active->delay) * bond->params.miimon);
1055 new_active->delay = 0;
1056 new_active->link = BOND_LINK_UP;
1058 if (bond->params.mode == BOND_MODE_8023AD)
1059 bond_3ad_handle_link_change(new_active, BOND_LINK_UP);
1061 if (bond_is_lb(bond))
1062 bond_alb_handle_link_change(bond, new_active, BOND_LINK_UP);
1064 if (USES_PRIMARY(bond->params.mode)) {
1065 pr_info("%s: making interface %s the new active one.\n",
1066 bond->dev->name, new_active->dev->name);
1071 if (USES_PRIMARY(bond->params.mode))
1072 bond_mc_swap(bond, new_active, old_active);
1074 if (bond_is_lb(bond)) {
1075 bond_alb_handle_active_change(bond, new_active);
1077 bond_set_slave_inactive_flags(old_active);
1079 bond_set_slave_active_flags(new_active);
1081 bond->curr_active_slave = new_active;
1084 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) {
1086 bond_set_slave_inactive_flags(old_active);
1089 bool should_notify_peers = false;
1091 bond_set_slave_active_flags(new_active);
1093 if (bond->params.fail_over_mac)
1094 bond_do_fail_over_mac(bond, new_active,
1097 if (netif_running(bond->dev)) {
1098 bond->send_peer_notif =
1099 bond->params.num_peer_notif;
1100 should_notify_peers =
1101 bond_should_notify_peers(bond);
1104 write_unlock_bh(&bond->curr_slave_lock);
1105 read_unlock(&bond->lock);
1107 netdev_bonding_change(bond->dev, NETDEV_BONDING_FAILOVER);
1108 if (should_notify_peers)
1109 netdev_bonding_change(bond->dev,
1110 NETDEV_NOTIFY_PEERS);
1112 read_lock(&bond->lock);
1113 write_lock_bh(&bond->curr_slave_lock);
1117 /* resend IGMP joins since active slave has changed or
1118 * all were sent on curr_active_slave.
1119 * resend only if bond is brought up with the affected
1120 * bonding modes and the retransmission is enabled */
1121 if (netif_running(bond->dev) && (bond->params.resend_igmp > 0) &&
1122 ((USES_PRIMARY(bond->params.mode) && new_active) ||
1123 bond->params.mode == BOND_MODE_ROUNDROBIN)) {
1124 bond->igmp_retrans = bond->params.resend_igmp;
1125 queue_delayed_work(bond->wq, &bond->mcast_work, 0);
1130 * bond_select_active_slave - select a new active slave, if needed
1131 * @bond: our bonding struct
1133 * This functions should be called when one of the following occurs:
1134 * - The old curr_active_slave has been released or lost its link.
1135 * - The primary_slave has got its link back.
1136 * - A slave has got its link back and there's no old curr_active_slave.
1138 * Caller must hold bond->lock for read and curr_slave_lock for write_bh.
1140 void bond_select_active_slave(struct bonding *bond)
1142 struct slave *best_slave;
1145 best_slave = bond_find_best_slave(bond);
1146 if (best_slave != bond->curr_active_slave) {
1147 bond_change_active_slave(bond, best_slave);
1148 rv = bond_set_carrier(bond);
1152 if (netif_carrier_ok(bond->dev)) {
1153 pr_info("%s: first active interface up!\n",
1156 pr_info("%s: now running without any active interface !\n",
1162 /*--------------------------- slave list handling ---------------------------*/
1165 * This function attaches the slave to the end of list.
1167 * bond->lock held for writing by caller.
1169 static void bond_attach_slave(struct bonding *bond, struct slave *new_slave)
1171 if (bond->first_slave == NULL) { /* attaching the first slave */
1172 new_slave->next = new_slave;
1173 new_slave->prev = new_slave;
1174 bond->first_slave = new_slave;
1176 new_slave->next = bond->first_slave;
1177 new_slave->prev = bond->first_slave->prev;
1178 new_slave->next->prev = new_slave;
1179 new_slave->prev->next = new_slave;
1186 * This function detaches the slave from the list.
1187 * WARNING: no check is made to verify if the slave effectively
1188 * belongs to <bond>.
1189 * Nothing is freed on return, structures are just unchained.
1190 * If any slave pointer in bond was pointing to <slave>,
1191 * it should be changed by the calling function.
1193 * bond->lock held for writing by caller.
1195 static void bond_detach_slave(struct bonding *bond, struct slave *slave)
1198 slave->next->prev = slave->prev;
1201 slave->prev->next = slave->next;
1203 if (bond->first_slave == slave) { /* slave is the first slave */
1204 if (bond->slave_cnt > 1) { /* there are more slave */
1205 bond->first_slave = slave->next;
1207 bond->first_slave = NULL; /* slave was the last one */
1216 #ifdef CONFIG_NET_POLL_CONTROLLER
1217 static inline int slave_enable_netpoll(struct slave *slave)
1222 np = kzalloc(sizeof(*np), GFP_KERNEL);
1227 np->dev = slave->dev;
1228 strlcpy(np->dev_name, slave->dev->name, IFNAMSIZ);
1229 err = __netpoll_setup(np);
1238 static inline void slave_disable_netpoll(struct slave *slave)
1240 struct netpoll *np = slave->np;
1246 synchronize_rcu_bh();
1247 __netpoll_cleanup(np);
1250 static inline bool slave_dev_support_netpoll(struct net_device *slave_dev)
1252 if (slave_dev->priv_flags & IFF_DISABLE_NETPOLL)
1254 if (!slave_dev->netdev_ops->ndo_poll_controller)
1259 static void bond_poll_controller(struct net_device *bond_dev)
1263 static void __bond_netpoll_cleanup(struct bonding *bond)
1265 struct slave *slave;
1268 bond_for_each_slave(bond, slave, i)
1269 if (IS_UP(slave->dev))
1270 slave_disable_netpoll(slave);
1272 static void bond_netpoll_cleanup(struct net_device *bond_dev)
1274 struct bonding *bond = netdev_priv(bond_dev);
1276 read_lock(&bond->lock);
1277 __bond_netpoll_cleanup(bond);
1278 read_unlock(&bond->lock);
1281 static int bond_netpoll_setup(struct net_device *dev, struct netpoll_info *ni)
1283 struct bonding *bond = netdev_priv(dev);
1284 struct slave *slave;
1287 read_lock(&bond->lock);
1288 bond_for_each_slave(bond, slave, i) {
1289 err = slave_enable_netpoll(slave);
1291 __bond_netpoll_cleanup(bond);
1295 read_unlock(&bond->lock);
1299 static struct netpoll_info *bond_netpoll_info(struct bonding *bond)
1301 return bond->dev->npinfo;
1305 static inline int slave_enable_netpoll(struct slave *slave)
1309 static inline void slave_disable_netpoll(struct slave *slave)
1312 static void bond_netpoll_cleanup(struct net_device *bond_dev)
1317 /*---------------------------------- IOCTL ----------------------------------*/
1319 static int bond_sethwaddr(struct net_device *bond_dev,
1320 struct net_device *slave_dev)
1322 pr_debug("bond_dev=%p\n", bond_dev);
1323 pr_debug("slave_dev=%p\n", slave_dev);
1324 pr_debug("slave_dev->addr_len=%d\n", slave_dev->addr_len);
1325 memcpy(bond_dev->dev_addr, slave_dev->dev_addr, slave_dev->addr_len);
1329 static u32 bond_fix_features(struct net_device *dev, u32 features)
1331 struct slave *slave;
1332 struct bonding *bond = netdev_priv(dev);
1336 read_lock(&bond->lock);
1338 if (!bond->first_slave) {
1339 /* Disable adding VLANs to empty bond. But why? --mq */
1340 features |= NETIF_F_VLAN_CHALLENGED;
1345 features &= ~NETIF_F_ONE_FOR_ALL;
1346 features |= NETIF_F_ALL_FOR_ALL;
1348 bond_for_each_slave(bond, slave, i) {
1349 features = netdev_increment_features(features,
1350 slave->dev->features,
1355 read_unlock(&bond->lock);
1359 #define BOND_VLAN_FEATURES (NETIF_F_ALL_CSUM | NETIF_F_SG | \
1360 NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
1361 NETIF_F_HIGHDMA | NETIF_F_LRO)
1363 static void bond_compute_features(struct bonding *bond)
1365 struct slave *slave;
1366 struct net_device *bond_dev = bond->dev;
1367 u32 vlan_features = BOND_VLAN_FEATURES;
1368 unsigned short max_hard_header_len = ETH_HLEN;
1369 unsigned int gso_max_size = GSO_MAX_SIZE;
1370 u16 gso_max_segs = GSO_MAX_SEGS;
1373 read_lock(&bond->lock);
1375 if (!bond->first_slave)
1378 bond_for_each_slave(bond, slave, i) {
1379 vlan_features = netdev_increment_features(vlan_features,
1380 slave->dev->vlan_features, BOND_VLAN_FEATURES);
1382 if (slave->dev->hard_header_len > max_hard_header_len)
1383 max_hard_header_len = slave->dev->hard_header_len;
1385 gso_max_size = min(gso_max_size, slave->dev->gso_max_size);
1386 gso_max_segs = min(gso_max_segs, slave->dev->gso_max_segs);
1390 bond_dev->vlan_features = vlan_features;
1391 bond_dev->hard_header_len = max_hard_header_len;
1392 bond_dev->gso_max_segs = gso_max_segs;
1393 netif_set_gso_max_size(bond_dev, gso_max_size);
1395 read_unlock(&bond->lock);
1397 netdev_change_features(bond_dev);
1400 static void bond_setup_by_slave(struct net_device *bond_dev,
1401 struct net_device *slave_dev)
1403 struct bonding *bond = netdev_priv(bond_dev);
1405 bond_dev->header_ops = slave_dev->header_ops;
1407 bond_dev->type = slave_dev->type;
1408 bond_dev->hard_header_len = slave_dev->hard_header_len;
1409 bond_dev->addr_len = slave_dev->addr_len;
1411 memcpy(bond_dev->broadcast, slave_dev->broadcast,
1412 slave_dev->addr_len);
1413 bond->setup_by_slave = 1;
1416 /* On bonding slaves other than the currently active slave, suppress
1417 * duplicates except for alb non-mcast/bcast.
1419 static bool bond_should_deliver_exact_match(struct sk_buff *skb,
1420 struct slave *slave,
1421 struct bonding *bond)
1423 if (bond_is_slave_inactive(slave)) {
1424 if (bond->params.mode == BOND_MODE_ALB &&
1425 skb->pkt_type != PACKET_BROADCAST &&
1426 skb->pkt_type != PACKET_MULTICAST)
1433 static rx_handler_result_t bond_handle_frame(struct sk_buff **pskb)
1435 struct sk_buff *skb = *pskb;
1436 struct slave *slave;
1437 struct bonding *bond;
1438 void (*recv_probe)(struct sk_buff *, struct bonding *,
1441 skb = skb_share_check(skb, GFP_ATOMIC);
1443 return RX_HANDLER_CONSUMED;
1447 slave = bond_slave_get_rcu(skb->dev);
1450 if (bond->params.arp_interval)
1451 slave->dev->last_rx = jiffies;
1453 recv_probe = ACCESS_ONCE(bond->recv_probe);
1455 struct sk_buff *nskb = skb_clone(skb, GFP_ATOMIC);
1458 recv_probe(nskb, bond, slave);
1459 dev_kfree_skb(nskb);
1463 if (bond_should_deliver_exact_match(skb, slave, bond)) {
1464 return RX_HANDLER_EXACT;
1467 skb->dev = bond->dev;
1469 if (bond->params.mode == BOND_MODE_ALB &&
1470 bond->dev->priv_flags & IFF_BRIDGE_PORT &&
1471 skb->pkt_type == PACKET_HOST) {
1473 if (unlikely(skb_cow_head(skb,
1474 skb->data - skb_mac_header(skb)))) {
1476 return RX_HANDLER_CONSUMED;
1478 memcpy(eth_hdr(skb)->h_dest, bond->dev->dev_addr, ETH_ALEN);
1481 return RX_HANDLER_ANOTHER;
1484 /* enslave device <slave> to bond device <master> */
1485 int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev)
1487 struct bonding *bond = netdev_priv(bond_dev);
1488 const struct net_device_ops *slave_ops = slave_dev->netdev_ops;
1489 struct slave *new_slave = NULL;
1490 struct netdev_hw_addr *ha;
1491 struct sockaddr addr;
1495 if (!bond->params.use_carrier && slave_dev->ethtool_ops == NULL &&
1496 slave_ops->ndo_do_ioctl == NULL) {
1497 pr_warning("%s: Warning: no link monitoring support for %s\n",
1498 bond_dev->name, slave_dev->name);
1501 /* already enslaved */
1502 if (slave_dev->flags & IFF_SLAVE) {
1503 pr_debug("Error, Device was already enslaved\n");
1507 /* vlan challenged mutual exclusion */
1508 /* no need to lock since we're protected by rtnl_lock */
1509 if (slave_dev->features & NETIF_F_VLAN_CHALLENGED) {
1510 pr_debug("%s: NETIF_F_VLAN_CHALLENGED\n", slave_dev->name);
1511 if (bond_vlan_used(bond)) {
1512 pr_err("%s: Error: cannot enslave VLAN challenged slave %s on VLAN enabled bond %s\n",
1513 bond_dev->name, slave_dev->name, bond_dev->name);
1516 pr_warning("%s: Warning: enslaved VLAN challenged slave %s. Adding VLANs will be blocked as long as %s is part of bond %s\n",
1517 bond_dev->name, slave_dev->name,
1518 slave_dev->name, bond_dev->name);
1521 pr_debug("%s: ! NETIF_F_VLAN_CHALLENGED\n", slave_dev->name);
1525 * Old ifenslave binaries are no longer supported. These can
1526 * be identified with moderate accuracy by the state of the slave:
1527 * the current ifenslave will set the interface down prior to
1528 * enslaving it; the old ifenslave will not.
1530 if ((slave_dev->flags & IFF_UP)) {
1531 pr_err("%s is up. This may be due to an out of date ifenslave.\n",
1534 goto err_undo_flags;
1537 /* set bonding device ether type by slave - bonding netdevices are
1538 * created with ether_setup, so when the slave type is not ARPHRD_ETHER
1539 * there is a need to override some of the type dependent attribs/funcs.
1541 * bond ether type mutual exclusion - don't allow slaves of dissimilar
1542 * ether type (eg ARPHRD_ETHER and ARPHRD_INFINIBAND) share the same bond
1544 if (bond->slave_cnt == 0) {
1545 if (bond_dev->type != slave_dev->type) {
1546 pr_debug("%s: change device type from %d to %d\n",
1548 bond_dev->type, slave_dev->type);
1550 res = netdev_bonding_change(bond_dev,
1551 NETDEV_PRE_TYPE_CHANGE);
1552 res = notifier_to_errno(res);
1554 pr_err("%s: refused to change device type\n",
1557 goto err_undo_flags;
1560 /* Flush unicast and multicast addresses */
1561 dev_uc_flush(bond_dev);
1562 dev_mc_flush(bond_dev);
1564 if (slave_dev->type != ARPHRD_ETHER)
1565 bond_setup_by_slave(bond_dev, slave_dev);
1567 ether_setup(bond_dev);
1568 bond_dev->priv_flags &= ~IFF_TX_SKB_SHARING;
1571 netdev_bonding_change(bond_dev,
1572 NETDEV_POST_TYPE_CHANGE);
1574 } else if (bond_dev->type != slave_dev->type) {
1575 pr_err("%s ether type (%d) is different from other slaves (%d), can not enslave it.\n",
1577 slave_dev->type, bond_dev->type);
1579 goto err_undo_flags;
1582 if (slave_ops->ndo_set_mac_address == NULL) {
1583 if (bond->slave_cnt == 0) {
1584 pr_warning("%s: Warning: The first slave device specified does not support setting the MAC address. Setting fail_over_mac to active.",
1586 bond->params.fail_over_mac = BOND_FOM_ACTIVE;
1587 } else if (bond->params.fail_over_mac != BOND_FOM_ACTIVE) {
1588 pr_err("%s: Error: The slave device specified does not support setting the MAC address, but fail_over_mac is not set to active.\n",
1591 goto err_undo_flags;
1595 call_netdevice_notifiers(NETDEV_JOIN, slave_dev);
1597 /* If this is the first slave, then we need to set the master's hardware
1598 * address to be the same as the slave's. */
1599 if (is_zero_ether_addr(bond->dev->dev_addr))
1600 memcpy(bond->dev->dev_addr, slave_dev->dev_addr,
1601 slave_dev->addr_len);
1604 new_slave = kzalloc(sizeof(struct slave), GFP_KERNEL);
1607 goto err_undo_flags;
1611 * Set the new_slave's queue_id to be zero. Queue ID mapping
1612 * is set via sysfs or module option if desired.
1614 new_slave->queue_id = 0;
1616 /* Save slave's original mtu and then set it to match the bond */
1617 new_slave->original_mtu = slave_dev->mtu;
1618 res = dev_set_mtu(slave_dev, bond->dev->mtu);
1620 pr_debug("Error %d calling dev_set_mtu\n", res);
1625 * Save slave's original ("permanent") mac address for modes
1626 * that need it, and for restoring it upon release, and then
1627 * set it to the master's address
1629 memcpy(new_slave->perm_hwaddr, slave_dev->dev_addr, ETH_ALEN);
1631 if (!bond->params.fail_over_mac) {
1633 * Set slave to master's mac address. The application already
1634 * set the master's mac address to that of the first slave
1636 memcpy(addr.sa_data, bond_dev->dev_addr, bond_dev->addr_len);
1637 addr.sa_family = slave_dev->type;
1638 res = dev_set_mac_address(slave_dev, &addr);
1640 pr_debug("Error %d calling set_mac_address\n", res);
1641 goto err_restore_mtu;
1645 res = netdev_set_bond_master(slave_dev, bond_dev);
1647 pr_debug("Error %d calling netdev_set_bond_master\n", res);
1648 goto err_restore_mac;
1651 /* open the slave since the application closed it */
1652 res = dev_open(slave_dev);
1654 pr_debug("Opening slave %s failed\n", slave_dev->name);
1655 goto err_unset_master;
1658 new_slave->bond = bond;
1659 new_slave->dev = slave_dev;
1660 slave_dev->priv_flags |= IFF_BONDING;
1662 if (bond_is_lb(bond)) {
1663 /* bond_alb_init_slave() must be called before all other stages since
1664 * it might fail and we do not want to have to undo everything
1666 res = bond_alb_init_slave(bond, new_slave);
1671 /* If the mode USES_PRIMARY, then the new slave gets the
1672 * master's promisc (and mc) settings only if it becomes the
1673 * curr_active_slave, and that is taken care of later when calling
1674 * bond_change_active()
1676 if (!USES_PRIMARY(bond->params.mode)) {
1677 /* set promiscuity level to new slave */
1678 if (bond_dev->flags & IFF_PROMISC) {
1679 res = dev_set_promiscuity(slave_dev, 1);
1684 /* set allmulti level to new slave */
1685 if (bond_dev->flags & IFF_ALLMULTI) {
1686 res = dev_set_allmulti(slave_dev, 1);
1691 netif_addr_lock_bh(bond_dev);
1692 /* upload master's mc_list to new slave */
1693 netdev_for_each_mc_addr(ha, bond_dev)
1694 dev_mc_add(slave_dev, ha->addr);
1695 netif_addr_unlock_bh(bond_dev);
1698 if (bond->params.mode == BOND_MODE_8023AD) {
1699 /* add lacpdu mc addr to mc list */
1700 u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR;
1702 dev_mc_add(slave_dev, lacpdu_multicast);
1705 bond_add_vlans_on_slave(bond, slave_dev);
1707 write_lock_bh(&bond->lock);
1709 bond_attach_slave(bond, new_slave);
1711 new_slave->delay = 0;
1712 new_slave->link_failure_count = 0;
1714 write_unlock_bh(&bond->lock);
1716 bond_compute_features(bond);
1718 read_lock(&bond->lock);
1720 new_slave->last_arp_rx = jiffies;
1722 if (bond->params.miimon && !bond->params.use_carrier) {
1723 link_reporting = bond_check_dev_link(bond, slave_dev, 1);
1725 if ((link_reporting == -1) && !bond->params.arp_interval) {
1727 * miimon is set but a bonded network driver
1728 * does not support ETHTOOL/MII and
1729 * arp_interval is not set. Note: if
1730 * use_carrier is enabled, we will never go
1731 * here (because netif_carrier is always
1732 * supported); thus, we don't need to change
1733 * the messages for netif_carrier.
1735 pr_warning("%s: Warning: MII and ETHTOOL support not available for interface %s, and arp_interval/arp_ip_target module parameters not specified, thus bonding will not detect link failures! see bonding.txt for details.\n",
1736 bond_dev->name, slave_dev->name);
1737 } else if (link_reporting == -1) {
1738 /* unable get link status using mii/ethtool */
1739 pr_warning("%s: Warning: can't get link status from interface %s; the network driver associated with this interface does not support MII or ETHTOOL link status reporting, thus miimon has no effect on this interface.\n",
1740 bond_dev->name, slave_dev->name);
1744 /* check for initial state */
1745 if (!bond->params.miimon ||
1746 (bond_check_dev_link(bond, slave_dev, 0) == BMSR_LSTATUS)) {
1747 if (bond->params.updelay) {
1748 pr_debug("Initial state of slave_dev is BOND_LINK_BACK\n");
1749 new_slave->link = BOND_LINK_BACK;
1750 new_slave->delay = bond->params.updelay;
1752 pr_debug("Initial state of slave_dev is BOND_LINK_UP\n");
1753 new_slave->link = BOND_LINK_UP;
1755 new_slave->jiffies = jiffies;
1757 pr_debug("Initial state of slave_dev is BOND_LINK_DOWN\n");
1758 new_slave->link = BOND_LINK_DOWN;
1761 bond_update_speed_duplex(new_slave);
1763 if (USES_PRIMARY(bond->params.mode) && bond->params.primary[0]) {
1764 /* if there is a primary slave, remember it */
1765 if (strcmp(bond->params.primary, new_slave->dev->name) == 0) {
1766 bond->primary_slave = new_slave;
1767 bond->force_primary = true;
1771 write_lock_bh(&bond->curr_slave_lock);
1773 switch (bond->params.mode) {
1774 case BOND_MODE_ACTIVEBACKUP:
1775 bond_set_slave_inactive_flags(new_slave);
1776 bond_select_active_slave(bond);
1778 case BOND_MODE_8023AD:
1779 /* in 802.3ad mode, the internal mechanism
1780 * will activate the slaves in the selected
1783 bond_set_slave_inactive_flags(new_slave);
1784 /* if this is the first slave */
1785 if (bond->slave_cnt == 1) {
1786 SLAVE_AD_INFO(new_slave).id = 1;
1787 /* Initialize AD with the number of times that the AD timer is called in 1 second
1788 * can be called only after the mac address of the bond is set
1790 bond_3ad_initialize(bond, 1000/AD_TIMER_INTERVAL);
1792 SLAVE_AD_INFO(new_slave).id =
1793 SLAVE_AD_INFO(new_slave->prev).id + 1;
1796 bond_3ad_bind_slave(new_slave);
1800 bond_set_active_slave(new_slave);
1801 bond_set_slave_inactive_flags(new_slave);
1802 bond_select_active_slave(bond);
1805 pr_debug("This slave is always active in trunk mode\n");
1807 /* always active in trunk mode */
1808 bond_set_active_slave(new_slave);
1810 /* In trunking mode there is little meaning to curr_active_slave
1811 * anyway (it holds no special properties of the bond device),
1812 * so we can change it without calling change_active_interface()
1814 if (!bond->curr_active_slave)
1815 bond->curr_active_slave = new_slave;
1818 } /* switch(bond_mode) */
1820 write_unlock_bh(&bond->curr_slave_lock);
1822 bond_set_carrier(bond);
1824 #ifdef CONFIG_NET_POLL_CONTROLLER
1825 slave_dev->npinfo = bond_netpoll_info(bond);
1826 if (slave_dev->npinfo) {
1827 if (slave_enable_netpoll(new_slave)) {
1828 read_unlock(&bond->lock);
1829 pr_info("Error, %s: master_dev is using netpoll, "
1830 "but new slave device does not support netpoll.\n",
1838 read_unlock(&bond->lock);
1840 res = bond_create_slave_symlinks(bond_dev, slave_dev);
1844 res = netdev_rx_handler_register(slave_dev, bond_handle_frame,
1847 pr_debug("Error %d calling netdev_rx_handler_register\n", res);
1848 goto err_dest_symlinks;
1851 pr_info("%s: enslaving %s as a%s interface with a%s link.\n",
1852 bond_dev->name, slave_dev->name,
1853 bond_is_active_slave(new_slave) ? "n active" : " backup",
1854 new_slave->link != BOND_LINK_DOWN ? "n up" : " down");
1856 /* enslave is successful */
1859 /* Undo stages on error */
1861 bond_destroy_slave_symlinks(bond_dev, slave_dev);
1864 write_lock_bh(&bond->lock);
1865 bond_detach_slave(bond, new_slave);
1866 write_unlock_bh(&bond->lock);
1869 dev_close(slave_dev);
1872 netdev_set_bond_master(slave_dev, NULL);
1875 if (!bond->params.fail_over_mac) {
1876 /* XXX TODO - fom follow mode needs to change master's
1877 * MAC if this slave's MAC is in use by the bond, or at
1878 * least print a warning.
1880 memcpy(addr.sa_data, new_slave->perm_hwaddr, ETH_ALEN);
1881 addr.sa_family = slave_dev->type;
1882 dev_set_mac_address(slave_dev, &addr);
1886 dev_set_mtu(slave_dev, new_slave->original_mtu);
1892 bond_compute_features(bond);
1898 * Try to release the slave device <slave> from the bond device <master>
1899 * It is legal to access curr_active_slave without a lock because all the function
1902 * The rules for slave state should be:
1903 * for Active/Backup:
1904 * Active stays on all backups go down
1905 * for Bonded connections:
1906 * The first up interface should be left on and all others downed.
1908 int bond_release(struct net_device *bond_dev, struct net_device *slave_dev)
1910 struct bonding *bond = netdev_priv(bond_dev);
1911 struct slave *slave, *oldcurrent;
1912 struct sockaddr addr;
1913 u32 old_features = bond_dev->features;
1915 /* slave is not a slave or master is not master of this slave */
1916 if (!(slave_dev->flags & IFF_SLAVE) ||
1917 (slave_dev->master != bond_dev)) {
1918 pr_err("%s: Error: cannot release %s.\n",
1919 bond_dev->name, slave_dev->name);
1924 netdev_bonding_change(bond_dev, NETDEV_RELEASE);
1925 write_lock_bh(&bond->lock);
1927 slave = bond_get_slave_by_dev(bond, slave_dev);
1929 /* not a slave of this bond */
1930 pr_info("%s: %s not enslaved\n",
1931 bond_dev->name, slave_dev->name);
1932 write_unlock_bh(&bond->lock);
1933 unblock_netpoll_tx();
1937 /* unregister rx_handler early so bond_handle_frame wouldn't be called
1938 * for this slave anymore.
1940 netdev_rx_handler_unregister(slave_dev);
1941 write_unlock_bh(&bond->lock);
1943 write_lock_bh(&bond->lock);
1945 if (!bond->params.fail_over_mac) {
1946 if (!compare_ether_addr(bond_dev->dev_addr, slave->perm_hwaddr) &&
1947 bond->slave_cnt > 1)
1948 pr_warning("%s: Warning: the permanent HWaddr of %s - %pM - is still in use by %s. Set the HWaddr of %s to a different address to avoid conflicts.\n",
1949 bond_dev->name, slave_dev->name,
1951 bond_dev->name, slave_dev->name);
1954 /* Inform AD package of unbinding of slave. */
1955 if (bond->params.mode == BOND_MODE_8023AD) {
1956 /* must be called before the slave is
1957 * detached from the list
1959 bond_3ad_unbind_slave(slave);
1962 pr_info("%s: releasing %s interface %s\n",
1964 bond_is_active_slave(slave) ? "active" : "backup",
1967 oldcurrent = bond->curr_active_slave;
1969 bond->current_arp_slave = NULL;
1971 /* release the slave from its bond */
1972 bond_detach_slave(bond, slave);
1974 if (bond->primary_slave == slave)
1975 bond->primary_slave = NULL;
1977 if (oldcurrent == slave)
1978 bond_change_active_slave(bond, NULL);
1980 if (bond_is_lb(bond)) {
1981 /* Must be called only after the slave has been
1982 * detached from the list and the curr_active_slave
1983 * has been cleared (if our_slave == old_current),
1984 * but before a new active slave is selected.
1986 write_unlock_bh(&bond->lock);
1987 bond_alb_deinit_slave(bond, slave);
1988 write_lock_bh(&bond->lock);
1991 if (oldcurrent == slave) {
1993 * Note that we hold RTNL over this sequence, so there
1994 * is no concern that another slave add/remove event
1997 write_unlock_bh(&bond->lock);
1998 read_lock(&bond->lock);
1999 write_lock_bh(&bond->curr_slave_lock);
2001 bond_select_active_slave(bond);
2003 write_unlock_bh(&bond->curr_slave_lock);
2004 read_unlock(&bond->lock);
2005 write_lock_bh(&bond->lock);
2008 if (bond->slave_cnt == 0) {
2009 bond_set_carrier(bond);
2011 /* if the last slave was removed, zero the mac address
2012 * of the master so it will be set by the application
2013 * to the mac address of the first slave
2015 memset(bond_dev->dev_addr, 0, bond_dev->addr_len);
2017 if (bond_vlan_used(bond)) {
2018 pr_warning("%s: Warning: clearing HW address of %s while it still has VLANs.\n",
2019 bond_dev->name, bond_dev->name);
2020 pr_warning("%s: When re-adding slaves, make sure the bond's HW address matches its VLANs'.\n",
2025 write_unlock_bh(&bond->lock);
2026 unblock_netpoll_tx();
2028 bond_compute_features(bond);
2029 if (!(bond_dev->features & NETIF_F_VLAN_CHALLENGED) &&
2030 (old_features & NETIF_F_VLAN_CHALLENGED))
2031 pr_info("%s: last VLAN challenged slave %s left bond %s. VLAN blocking is removed\n",
2032 bond_dev->name, slave_dev->name, bond_dev->name);
2034 /* must do this from outside any spinlocks */
2035 bond_destroy_slave_symlinks(bond_dev, slave_dev);
2037 bond_del_vlans_from_slave(bond, slave_dev);
2039 /* If the mode USES_PRIMARY, then we should only remove its
2040 * promisc and mc settings if it was the curr_active_slave, but that was
2041 * already taken care of above when we detached the slave
2043 if (!USES_PRIMARY(bond->params.mode)) {
2044 /* unset promiscuity level from slave */
2045 if (bond_dev->flags & IFF_PROMISC)
2046 dev_set_promiscuity(slave_dev, -1);
2048 /* unset allmulti level from slave */
2049 if (bond_dev->flags & IFF_ALLMULTI)
2050 dev_set_allmulti(slave_dev, -1);
2052 /* flush master's mc_list from slave */
2053 netif_addr_lock_bh(bond_dev);
2054 bond_mc_list_flush(bond_dev, slave_dev);
2055 netif_addr_unlock_bh(bond_dev);
2058 netdev_set_bond_master(slave_dev, NULL);
2060 slave_disable_netpoll(slave);
2062 /* close slave before restoring its mac address */
2063 dev_close(slave_dev);
2065 if (bond->params.fail_over_mac != BOND_FOM_ACTIVE) {
2066 /* restore original ("permanent") mac address */
2067 memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN);
2068 addr.sa_family = slave_dev->type;
2069 dev_set_mac_address(slave_dev, &addr);
2072 dev_set_mtu(slave_dev, slave->original_mtu);
2074 slave_dev->priv_flags &= ~IFF_BONDING;
2078 return 0; /* deletion OK */
2082 * First release a slave and then destroy the bond if no more slaves are left.
2083 * Must be under rtnl_lock when this function is called.
2085 static int bond_release_and_destroy(struct net_device *bond_dev,
2086 struct net_device *slave_dev)
2088 struct bonding *bond = netdev_priv(bond_dev);
2091 ret = bond_release(bond_dev, slave_dev);
2092 if ((ret == 0) && (bond->slave_cnt == 0)) {
2093 bond_dev->priv_flags |= IFF_DISABLE_NETPOLL;
2094 pr_info("%s: destroying bond %s.\n",
2095 bond_dev->name, bond_dev->name);
2096 unregister_netdevice(bond_dev);
2102 * This function releases all slaves.
2104 static int bond_release_all(struct net_device *bond_dev)
2106 struct bonding *bond = netdev_priv(bond_dev);
2107 struct slave *slave;
2108 struct net_device *slave_dev;
2109 struct sockaddr addr;
2111 write_lock_bh(&bond->lock);
2113 netif_carrier_off(bond_dev);
2115 if (bond->slave_cnt == 0)
2118 bond->current_arp_slave = NULL;
2119 bond->primary_slave = NULL;
2120 bond_change_active_slave(bond, NULL);
2122 while ((slave = bond->first_slave) != NULL) {
2123 /* Inform AD package of unbinding of slave
2124 * before slave is detached from the list.
2126 if (bond->params.mode == BOND_MODE_8023AD)
2127 bond_3ad_unbind_slave(slave);
2129 slave_dev = slave->dev;
2130 bond_detach_slave(bond, slave);
2132 /* now that the slave is detached, unlock and perform
2133 * all the undo steps that should not be called from
2136 write_unlock_bh(&bond->lock);
2138 /* unregister rx_handler early so bond_handle_frame wouldn't
2139 * be called for this slave anymore.
2141 netdev_rx_handler_unregister(slave_dev);
2144 if (bond_is_lb(bond)) {
2145 /* must be called only after the slave
2146 * has been detached from the list
2148 bond_alb_deinit_slave(bond, slave);
2151 bond_destroy_slave_symlinks(bond_dev, slave_dev);
2152 bond_del_vlans_from_slave(bond, slave_dev);
2154 /* If the mode USES_PRIMARY, then we should only remove its
2155 * promisc and mc settings if it was the curr_active_slave, but that was
2156 * already taken care of above when we detached the slave
2158 if (!USES_PRIMARY(bond->params.mode)) {
2159 /* unset promiscuity level from slave */
2160 if (bond_dev->flags & IFF_PROMISC)
2161 dev_set_promiscuity(slave_dev, -1);
2163 /* unset allmulti level from slave */
2164 if (bond_dev->flags & IFF_ALLMULTI)
2165 dev_set_allmulti(slave_dev, -1);
2167 /* flush master's mc_list from slave */
2168 netif_addr_lock_bh(bond_dev);
2169 bond_mc_list_flush(bond_dev, slave_dev);
2170 netif_addr_unlock_bh(bond_dev);
2173 netdev_set_bond_master(slave_dev, NULL);
2175 slave_disable_netpoll(slave);
2177 /* close slave before restoring its mac address */
2178 dev_close(slave_dev);
2180 if (!bond->params.fail_over_mac) {
2181 /* restore original ("permanent") mac address*/
2182 memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN);
2183 addr.sa_family = slave_dev->type;
2184 dev_set_mac_address(slave_dev, &addr);
2189 /* re-acquire the lock before getting the next slave */
2190 write_lock_bh(&bond->lock);
2193 /* zero the mac address of the master so it will be
2194 * set by the application to the mac address of the
2197 memset(bond_dev->dev_addr, 0, bond_dev->addr_len);
2199 if (bond_vlan_used(bond)) {
2200 pr_warning("%s: Warning: clearing HW address of %s while it still has VLANs.\n",
2201 bond_dev->name, bond_dev->name);
2202 pr_warning("%s: When re-adding slaves, make sure the bond's HW address matches its VLANs'.\n",
2206 pr_info("%s: released all slaves\n", bond_dev->name);
2209 write_unlock_bh(&bond->lock);
2211 bond_compute_features(bond);
2217 * This function changes the active slave to slave <slave_dev>.
2218 * It returns -EINVAL in the following cases.
2219 * - <slave_dev> is not found in the list.
2220 * - There is not active slave now.
2221 * - <slave_dev> is already active.
2222 * - The link state of <slave_dev> is not BOND_LINK_UP.
2223 * - <slave_dev> is not running.
2224 * In these cases, this function does nothing.
2225 * In the other cases, current_slave pointer is changed and 0 is returned.
2227 static int bond_ioctl_change_active(struct net_device *bond_dev, struct net_device *slave_dev)
2229 struct bonding *bond = netdev_priv(bond_dev);
2230 struct slave *old_active = NULL;
2231 struct slave *new_active = NULL;
2234 if (!USES_PRIMARY(bond->params.mode))
2237 /* Verify that master_dev is indeed the master of slave_dev */
2238 if (!(slave_dev->flags & IFF_SLAVE) || (slave_dev->master != bond_dev))
2241 read_lock(&bond->lock);
2243 read_lock(&bond->curr_slave_lock);
2244 old_active = bond->curr_active_slave;
2245 read_unlock(&bond->curr_slave_lock);
2247 new_active = bond_get_slave_by_dev(bond, slave_dev);
2250 * Changing to the current active: do nothing; return success.
2252 if (new_active && (new_active == old_active)) {
2253 read_unlock(&bond->lock);
2259 (new_active->link == BOND_LINK_UP) &&
2260 IS_UP(new_active->dev)) {
2262 write_lock_bh(&bond->curr_slave_lock);
2263 bond_change_active_slave(bond, new_active);
2264 write_unlock_bh(&bond->curr_slave_lock);
2265 unblock_netpoll_tx();
2269 read_unlock(&bond->lock);
2274 static int bond_info_query(struct net_device *bond_dev, struct ifbond *info)
2276 struct bonding *bond = netdev_priv(bond_dev);
2278 info->bond_mode = bond->params.mode;
2279 info->miimon = bond->params.miimon;
2281 read_lock(&bond->lock);
2282 info->num_slaves = bond->slave_cnt;
2283 read_unlock(&bond->lock);
2288 static int bond_slave_info_query(struct net_device *bond_dev, struct ifslave *info)
2290 struct bonding *bond = netdev_priv(bond_dev);
2291 struct slave *slave;
2292 int i, res = -ENODEV;
2294 read_lock(&bond->lock);
2296 bond_for_each_slave(bond, slave, i) {
2297 if (i == (int)info->slave_id) {
2299 strcpy(info->slave_name, slave->dev->name);
2300 info->link = slave->link;
2301 info->state = bond_slave_state(slave);
2302 info->link_failure_count = slave->link_failure_count;
2307 read_unlock(&bond->lock);
2312 /*-------------------------------- Monitoring -------------------------------*/
2315 static int bond_miimon_inspect(struct bonding *bond)
2317 struct slave *slave;
2318 int i, link_state, commit = 0;
2319 bool ignore_updelay;
2321 ignore_updelay = !bond->curr_active_slave ? true : false;
2323 bond_for_each_slave(bond, slave, i) {
2324 slave->new_link = BOND_LINK_NOCHANGE;
2326 link_state = bond_check_dev_link(bond, slave->dev, 0);
2328 switch (slave->link) {
2333 slave->link = BOND_LINK_FAIL;
2334 slave->delay = bond->params.downdelay;
2336 pr_info("%s: link status down for %sinterface %s, disabling it in %d ms.\n",
2338 (bond->params.mode ==
2339 BOND_MODE_ACTIVEBACKUP) ?
2340 (bond_is_active_slave(slave) ?
2341 "active " : "backup ") : "",
2343 bond->params.downdelay * bond->params.miimon);
2346 case BOND_LINK_FAIL:
2349 * recovered before downdelay expired
2351 slave->link = BOND_LINK_UP;
2352 slave->jiffies = jiffies;
2353 pr_info("%s: link status up again after %d ms for interface %s.\n",
2355 (bond->params.downdelay - slave->delay) *
2356 bond->params.miimon,
2361 if (slave->delay <= 0) {
2362 slave->new_link = BOND_LINK_DOWN;
2370 case BOND_LINK_DOWN:
2374 slave->link = BOND_LINK_BACK;
2375 slave->delay = bond->params.updelay;
2378 pr_info("%s: link status up for interface %s, enabling it in %d ms.\n",
2379 bond->dev->name, slave->dev->name,
2380 ignore_updelay ? 0 :
2381 bond->params.updelay *
2382 bond->params.miimon);
2385 case BOND_LINK_BACK:
2387 slave->link = BOND_LINK_DOWN;
2388 pr_info("%s: link status down again after %d ms for interface %s.\n",
2390 (bond->params.updelay - slave->delay) *
2391 bond->params.miimon,
2400 if (slave->delay <= 0) {
2401 slave->new_link = BOND_LINK_UP;
2403 ignore_updelay = false;
2415 static void bond_miimon_commit(struct bonding *bond)
2417 struct slave *slave;
2420 bond_for_each_slave(bond, slave, i) {
2421 switch (slave->new_link) {
2422 case BOND_LINK_NOCHANGE:
2426 slave->link = BOND_LINK_UP;
2427 slave->jiffies = jiffies;
2429 if (bond->params.mode == BOND_MODE_8023AD) {
2430 /* prevent it from being the active one */
2431 bond_set_backup_slave(slave);
2432 } else if (bond->params.mode != BOND_MODE_ACTIVEBACKUP) {
2433 /* make it immediately active */
2434 bond_set_active_slave(slave);
2435 } else if (slave != bond->primary_slave) {
2436 /* prevent it from being the active one */
2437 bond_set_backup_slave(slave);
2440 bond_update_speed_duplex(slave);
2442 pr_info("%s: link status definitely up for interface %s, %u Mbps %s duplex.\n",
2443 bond->dev->name, slave->dev->name,
2444 slave->speed, slave->duplex ? "full" : "half");
2446 /* notify ad that the link status has changed */
2447 if (bond->params.mode == BOND_MODE_8023AD)
2448 bond_3ad_handle_link_change(slave, BOND_LINK_UP);
2450 if (bond_is_lb(bond))
2451 bond_alb_handle_link_change(bond, slave,
2454 if (!bond->curr_active_slave ||
2455 (slave == bond->primary_slave))
2460 case BOND_LINK_DOWN:
2461 if (slave->link_failure_count < UINT_MAX)
2462 slave->link_failure_count++;
2464 slave->link = BOND_LINK_DOWN;
2466 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP ||
2467 bond->params.mode == BOND_MODE_8023AD)
2468 bond_set_slave_inactive_flags(slave);
2470 pr_info("%s: link status definitely down for interface %s, disabling it\n",
2471 bond->dev->name, slave->dev->name);
2473 if (bond->params.mode == BOND_MODE_8023AD)
2474 bond_3ad_handle_link_change(slave,
2477 if (bond_is_lb(bond))
2478 bond_alb_handle_link_change(bond, slave,
2481 if (slave == bond->curr_active_slave)
2487 pr_err("%s: invalid new link %d on slave %s\n",
2488 bond->dev->name, slave->new_link,
2490 slave->new_link = BOND_LINK_NOCHANGE;
2498 write_lock_bh(&bond->curr_slave_lock);
2499 bond_select_active_slave(bond);
2500 write_unlock_bh(&bond->curr_slave_lock);
2501 unblock_netpoll_tx();
2504 bond_set_carrier(bond);
2510 * Really a wrapper that splits the mii monitor into two phases: an
2511 * inspection, then (if inspection indicates something needs to be done)
2512 * an acquisition of appropriate locks followed by a commit phase to
2513 * implement whatever link state changes are indicated.
2515 void bond_mii_monitor(struct work_struct *work)
2517 struct bonding *bond = container_of(work, struct bonding,
2519 bool should_notify_peers = false;
2520 unsigned long delay;
2522 read_lock(&bond->lock);
2524 delay = msecs_to_jiffies(bond->params.miimon);
2526 if (bond->slave_cnt == 0)
2529 should_notify_peers = bond_should_notify_peers(bond);
2531 if (bond_miimon_inspect(bond)) {
2532 read_unlock(&bond->lock);
2534 /* Race avoidance with bond_close cancel of workqueue */
2535 if (!rtnl_trylock()) {
2536 read_lock(&bond->lock);
2538 should_notify_peers = false;
2542 read_lock(&bond->lock);
2544 bond_miimon_commit(bond);
2546 read_unlock(&bond->lock);
2547 rtnl_unlock(); /* might sleep, hold no other locks */
2548 read_lock(&bond->lock);
2552 if (bond->params.miimon)
2553 queue_delayed_work(bond->wq, &bond->mii_work, delay);
2555 read_unlock(&bond->lock);
2557 if (should_notify_peers) {
2558 if (!rtnl_trylock()) {
2559 read_lock(&bond->lock);
2560 bond->send_peer_notif++;
2561 read_unlock(&bond->lock);
2564 netdev_bonding_change(bond->dev, NETDEV_NOTIFY_PEERS);
2569 static int bond_has_this_ip(struct bonding *bond, __be32 ip)
2571 struct vlan_entry *vlan;
2573 if (ip == bond->master_ip)
2576 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
2577 if (ip == vlan->vlan_ip)
2585 * We go to the (large) trouble of VLAN tagging ARP frames because
2586 * switches in VLAN mode (especially if ports are configured as
2587 * "native" to a VLAN) might not pass non-tagged frames.
2589 static void bond_arp_send(struct net_device *slave_dev, int arp_op, __be32 dest_ip, __be32 src_ip, unsigned short vlan_id)
2591 struct sk_buff *skb;
2593 pr_debug("arp %d on slave %s: dst %x src %x vid %d\n", arp_op,
2594 slave_dev->name, dest_ip, src_ip, vlan_id);
2596 skb = arp_create(arp_op, ETH_P_ARP, dest_ip, slave_dev, src_ip,
2597 NULL, slave_dev->dev_addr, NULL);
2600 pr_err("ARP packet allocation failed\n");
2604 skb = vlan_put_tag(skb, vlan_id);
2606 pr_err("failed to insert VLAN tag\n");
2614 static void bond_arp_send_all(struct bonding *bond, struct slave *slave)
2617 __be32 *targets = bond->params.arp_targets;
2618 struct vlan_entry *vlan;
2619 struct net_device *vlan_dev;
2622 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
2625 pr_debug("basa: target %x\n", targets[i]);
2626 if (!bond_vlan_used(bond)) {
2627 pr_debug("basa: empty vlan: arp_send\n");
2628 bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i],
2629 bond->master_ip, 0);
2634 * If VLANs are configured, we do a route lookup to
2635 * determine which VLAN interface would be used, so we
2636 * can tag the ARP with the proper VLAN tag.
2638 rt = ip_route_output(dev_net(bond->dev), targets[i], 0,
2641 if (net_ratelimit()) {
2642 pr_warning("%s: no route to arp_ip_target %pI4\n",
2643 bond->dev->name, &targets[i]);
2649 * This target is not on a VLAN
2651 if (rt->dst.dev == bond->dev) {
2653 pr_debug("basa: rtdev == bond->dev: arp_send\n");
2654 bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i],
2655 bond->master_ip, 0);
2660 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
2662 vlan_dev = __vlan_find_dev_deep(bond->dev,
2665 if (vlan_dev == rt->dst.dev) {
2666 vlan_id = vlan->vlan_id;
2667 pr_debug("basa: vlan match on %s %d\n",
2668 vlan_dev->name, vlan_id);
2675 bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i],
2676 vlan->vlan_ip, vlan_id);
2680 if (net_ratelimit()) {
2681 pr_warning("%s: no path to arp_ip_target %pI4 via rt.dev %s\n",
2682 bond->dev->name, &targets[i],
2683 rt->dst.dev ? rt->dst.dev->name : "NULL");
2689 static void bond_validate_arp(struct bonding *bond, struct slave *slave, __be32 sip, __be32 tip)
2692 __be32 *targets = bond->params.arp_targets;
2694 for (i = 0; (i < BOND_MAX_ARP_TARGETS) && targets[i]; i++) {
2695 pr_debug("bva: sip %pI4 tip %pI4 t[%d] %pI4 bhti(tip) %d\n",
2696 &sip, &tip, i, &targets[i],
2697 bond_has_this_ip(bond, tip));
2698 if (sip == targets[i]) {
2699 if (bond_has_this_ip(bond, tip))
2700 slave->last_arp_rx = jiffies;
2706 static void bond_arp_rcv(struct sk_buff *skb, struct bonding *bond,
2707 struct slave *slave)
2710 unsigned char *arp_ptr;
2713 if (skb->protocol != __cpu_to_be16(ETH_P_ARP))
2716 read_lock(&bond->lock);
2718 pr_debug("bond_arp_rcv: bond %s skb->dev %s\n",
2719 bond->dev->name, skb->dev->name);
2721 if (!pskb_may_pull(skb, arp_hdr_len(bond->dev)))
2725 if (arp->ar_hln != bond->dev->addr_len ||
2726 skb->pkt_type == PACKET_OTHERHOST ||
2727 skb->pkt_type == PACKET_LOOPBACK ||
2728 arp->ar_hrd != htons(ARPHRD_ETHER) ||
2729 arp->ar_pro != htons(ETH_P_IP) ||
2733 arp_ptr = (unsigned char *)(arp + 1);
2734 arp_ptr += bond->dev->addr_len;
2735 memcpy(&sip, arp_ptr, 4);
2736 arp_ptr += 4 + bond->dev->addr_len;
2737 memcpy(&tip, arp_ptr, 4);
2739 pr_debug("bond_arp_rcv: %s %s/%d av %d sv %d sip %pI4 tip %pI4\n",
2740 bond->dev->name, slave->dev->name, bond_slave_state(slave),
2741 bond->params.arp_validate, slave_do_arp_validate(bond, slave),
2745 * Backup slaves won't see the ARP reply, but do come through
2746 * here for each ARP probe (so we swap the sip/tip to validate
2747 * the probe). In a "redundant switch, common router" type of
2748 * configuration, the ARP probe will (hopefully) travel from
2749 * the active, through one switch, the router, then the other
2750 * switch before reaching the backup.
2752 if (bond_is_active_slave(slave))
2753 bond_validate_arp(bond, slave, sip, tip);
2755 bond_validate_arp(bond, slave, tip, sip);
2758 read_unlock(&bond->lock);
2762 * this function is called regularly to monitor each slave's link
2763 * ensuring that traffic is being sent and received when arp monitoring
2764 * is used in load-balancing mode. if the adapter has been dormant, then an
2765 * arp is transmitted to generate traffic. see activebackup_arp_monitor for
2766 * arp monitoring in active backup mode.
2768 void bond_loadbalance_arp_mon(struct work_struct *work)
2770 struct bonding *bond = container_of(work, struct bonding,
2772 struct slave *slave, *oldcurrent;
2773 int do_failover = 0;
2777 read_lock(&bond->lock);
2779 delta_in_ticks = msecs_to_jiffies(bond->params.arp_interval);
2781 if (bond->slave_cnt == 0)
2784 read_lock(&bond->curr_slave_lock);
2785 oldcurrent = bond->curr_active_slave;
2786 read_unlock(&bond->curr_slave_lock);
2788 /* see if any of the previous devices are up now (i.e. they have
2789 * xmt and rcv traffic). the curr_active_slave does not come into
2790 * the picture unless it is null. also, slave->jiffies is not needed
2791 * here because we send an arp on each slave and give a slave as
2792 * long as it needs to get the tx/rx within the delta.
2793 * TODO: what about up/down delay in arp mode? it wasn't here before
2796 bond_for_each_slave(bond, slave, i) {
2797 unsigned long trans_start = dev_trans_start(slave->dev);
2799 if (slave->link != BOND_LINK_UP) {
2800 if (time_in_range(jiffies,
2801 trans_start - delta_in_ticks,
2802 trans_start + delta_in_ticks) &&
2803 time_in_range(jiffies,
2804 slave->dev->last_rx - delta_in_ticks,
2805 slave->dev->last_rx + delta_in_ticks)) {
2807 slave->link = BOND_LINK_UP;
2808 bond_set_active_slave(slave);
2810 /* primary_slave has no meaning in round-robin
2811 * mode. the window of a slave being up and
2812 * curr_active_slave being null after enslaving
2816 pr_info("%s: link status definitely up for interface %s, ",
2821 pr_info("%s: interface %s is now up\n",
2827 /* slave->link == BOND_LINK_UP */
2829 /* not all switches will respond to an arp request
2830 * when the source ip is 0, so don't take the link down
2831 * if we don't know our ip yet
2833 if (!time_in_range(jiffies,
2834 trans_start - delta_in_ticks,
2835 trans_start + 2 * delta_in_ticks) ||
2836 !time_in_range(jiffies,
2837 slave->dev->last_rx - delta_in_ticks,
2838 slave->dev->last_rx + 2 * delta_in_ticks)) {
2840 slave->link = BOND_LINK_DOWN;
2841 bond_set_backup_slave(slave);
2843 if (slave->link_failure_count < UINT_MAX)
2844 slave->link_failure_count++;
2846 pr_info("%s: interface %s is now down.\n",
2850 if (slave == oldcurrent)
2855 /* note: if switch is in round-robin mode, all links
2856 * must tx arp to ensure all links rx an arp - otherwise
2857 * links may oscillate or not come up at all; if switch is
2858 * in something like xor mode, there is nothing we can
2859 * do - all replies will be rx'ed on same link causing slaves
2860 * to be unstable during low/no traffic periods
2862 if (IS_UP(slave->dev))
2863 bond_arp_send_all(bond, slave);
2868 write_lock_bh(&bond->curr_slave_lock);
2870 bond_select_active_slave(bond);
2872 write_unlock_bh(&bond->curr_slave_lock);
2873 unblock_netpoll_tx();
2877 if (bond->params.arp_interval)
2878 queue_delayed_work(bond->wq, &bond->arp_work, delta_in_ticks);
2880 read_unlock(&bond->lock);
2884 * Called to inspect slaves for active-backup mode ARP monitor link state
2885 * changes. Sets new_link in slaves to specify what action should take
2886 * place for the slave. Returns 0 if no changes are found, >0 if changes
2887 * to link states must be committed.
2889 * Called with bond->lock held for read.
2891 static int bond_ab_arp_inspect(struct bonding *bond, int delta_in_ticks)
2893 struct slave *slave;
2895 unsigned long trans_start;
2897 bond_for_each_slave(bond, slave, i) {
2898 slave->new_link = BOND_LINK_NOCHANGE;
2900 if (slave->link != BOND_LINK_UP) {
2901 if (time_in_range(jiffies,
2902 slave_last_rx(bond, slave) - delta_in_ticks,
2903 slave_last_rx(bond, slave) + delta_in_ticks)) {
2905 slave->new_link = BOND_LINK_UP;
2913 * Give slaves 2*delta after being enslaved or made
2914 * active. This avoids bouncing, as the last receive
2915 * times need a full ARP monitor cycle to be updated.
2917 if (time_in_range(jiffies,
2918 slave->jiffies - delta_in_ticks,
2919 slave->jiffies + 2 * delta_in_ticks))
2923 * Backup slave is down if:
2924 * - No current_arp_slave AND
2925 * - more than 3*delta since last receive AND
2926 * - the bond has an IP address
2928 * Note: a non-null current_arp_slave indicates
2929 * the curr_active_slave went down and we are
2930 * searching for a new one; under this condition
2931 * we only take the curr_active_slave down - this
2932 * gives each slave a chance to tx/rx traffic
2933 * before being taken out
2935 if (!bond_is_active_slave(slave) &&
2936 !bond->current_arp_slave &&
2937 !time_in_range(jiffies,
2938 slave_last_rx(bond, slave) - delta_in_ticks,
2939 slave_last_rx(bond, slave) + 3 * delta_in_ticks)) {
2941 slave->new_link = BOND_LINK_DOWN;
2946 * Active slave is down if:
2947 * - more than 2*delta since transmitting OR
2948 * - (more than 2*delta since receive AND
2949 * the bond has an IP address)
2951 trans_start = dev_trans_start(slave->dev);
2952 if (bond_is_active_slave(slave) &&
2953 (!time_in_range(jiffies,
2954 trans_start - delta_in_ticks,
2955 trans_start + 2 * delta_in_ticks) ||
2956 !time_in_range(jiffies,
2957 slave_last_rx(bond, slave) - delta_in_ticks,
2958 slave_last_rx(bond, slave) + 2 * delta_in_ticks))) {
2960 slave->new_link = BOND_LINK_DOWN;
2969 * Called to commit link state changes noted by inspection step of
2970 * active-backup mode ARP monitor.
2972 * Called with RTNL and bond->lock for read.
2974 static void bond_ab_arp_commit(struct bonding *bond, int delta_in_ticks)
2976 struct slave *slave;
2978 unsigned long trans_start;
2980 bond_for_each_slave(bond, slave, i) {
2981 switch (slave->new_link) {
2982 case BOND_LINK_NOCHANGE:
2986 trans_start = dev_trans_start(slave->dev);
2987 if ((!bond->curr_active_slave &&
2988 time_in_range(jiffies,
2989 trans_start - delta_in_ticks,
2990 trans_start + delta_in_ticks)) ||
2991 bond->curr_active_slave != slave) {
2992 slave->link = BOND_LINK_UP;
2993 if (bond->current_arp_slave) {
2994 bond_set_slave_inactive_flags(
2995 bond->current_arp_slave);
2996 bond->current_arp_slave = NULL;
2999 pr_info("%s: link status definitely up for interface %s.\n",
3000 bond->dev->name, slave->dev->name);
3002 if (!bond->curr_active_slave ||
3003 (slave == bond->primary_slave))
3010 case BOND_LINK_DOWN:
3011 if (slave->link_failure_count < UINT_MAX)
3012 slave->link_failure_count++;
3014 slave->link = BOND_LINK_DOWN;
3015 bond_set_slave_inactive_flags(slave);
3017 pr_info("%s: link status definitely down for interface %s, disabling it\n",
3018 bond->dev->name, slave->dev->name);
3020 if (slave == bond->curr_active_slave) {
3021 bond->current_arp_slave = NULL;
3028 pr_err("%s: impossible: new_link %d on slave %s\n",
3029 bond->dev->name, slave->new_link,
3037 write_lock_bh(&bond->curr_slave_lock);
3038 bond_select_active_slave(bond);
3039 write_unlock_bh(&bond->curr_slave_lock);
3040 unblock_netpoll_tx();
3043 bond_set_carrier(bond);
3047 * Send ARP probes for active-backup mode ARP monitor.
3049 * Called with bond->lock held for read.
3051 static void bond_ab_arp_probe(struct bonding *bond)
3053 struct slave *slave;
3056 read_lock(&bond->curr_slave_lock);
3058 if (bond->current_arp_slave && bond->curr_active_slave)
3059 pr_info("PROBE: c_arp %s && cas %s BAD\n",
3060 bond->current_arp_slave->dev->name,
3061 bond->curr_active_slave->dev->name);
3063 if (bond->curr_active_slave) {
3064 bond_arp_send_all(bond, bond->curr_active_slave);
3065 read_unlock(&bond->curr_slave_lock);
3069 read_unlock(&bond->curr_slave_lock);
3071 /* if we don't have a curr_active_slave, search for the next available
3072 * backup slave from the current_arp_slave and make it the candidate
3073 * for becoming the curr_active_slave
3076 if (!bond->current_arp_slave) {
3077 bond->current_arp_slave = bond->first_slave;
3078 if (!bond->current_arp_slave)
3082 bond_set_slave_inactive_flags(bond->current_arp_slave);
3084 /* search for next candidate */
3085 bond_for_each_slave_from(bond, slave, i, bond->current_arp_slave->next) {
3086 if (IS_UP(slave->dev)) {
3087 slave->link = BOND_LINK_BACK;
3088 bond_set_slave_active_flags(slave);
3089 bond_arp_send_all(bond, slave);
3090 slave->jiffies = jiffies;
3091 bond->current_arp_slave = slave;
3095 /* if the link state is up at this point, we
3096 * mark it down - this can happen if we have
3097 * simultaneous link failures and
3098 * reselect_active_interface doesn't make this
3099 * one the current slave so it is still marked
3100 * up when it is actually down
3102 if (slave->link == BOND_LINK_UP) {
3103 slave->link = BOND_LINK_DOWN;
3104 if (slave->link_failure_count < UINT_MAX)
3105 slave->link_failure_count++;
3107 bond_set_slave_inactive_flags(slave);
3109 pr_info("%s: backup interface %s is now down.\n",
3110 bond->dev->name, slave->dev->name);
3115 void bond_activebackup_arp_mon(struct work_struct *work)
3117 struct bonding *bond = container_of(work, struct bonding,
3119 bool should_notify_peers = false;
3122 read_lock(&bond->lock);
3124 delta_in_ticks = msecs_to_jiffies(bond->params.arp_interval);
3126 if (bond->slave_cnt == 0)
3129 should_notify_peers = bond_should_notify_peers(bond);
3131 if (bond_ab_arp_inspect(bond, delta_in_ticks)) {
3132 read_unlock(&bond->lock);
3134 /* Race avoidance with bond_close flush of workqueue */
3135 if (!rtnl_trylock()) {
3136 read_lock(&bond->lock);
3138 should_notify_peers = false;
3142 read_lock(&bond->lock);
3144 bond_ab_arp_commit(bond, delta_in_ticks);
3146 read_unlock(&bond->lock);
3148 read_lock(&bond->lock);
3151 bond_ab_arp_probe(bond);
3154 if (bond->params.arp_interval)
3155 queue_delayed_work(bond->wq, &bond->arp_work, delta_in_ticks);
3157 read_unlock(&bond->lock);
3159 if (should_notify_peers) {
3160 if (!rtnl_trylock()) {
3161 read_lock(&bond->lock);
3162 bond->send_peer_notif++;
3163 read_unlock(&bond->lock);
3166 netdev_bonding_change(bond->dev, NETDEV_NOTIFY_PEERS);
3171 /*-------------------------- netdev event handling --------------------------*/
3174 * Change device name
3176 static int bond_event_changename(struct bonding *bond)
3178 bond_remove_proc_entry(bond);
3179 bond_create_proc_entry(bond);
3181 bond_debug_reregister(bond);
3186 static int bond_master_netdev_event(unsigned long event,
3187 struct net_device *bond_dev)
3189 struct bonding *event_bond = netdev_priv(bond_dev);
3192 case NETDEV_CHANGENAME:
3193 return bond_event_changename(event_bond);
3194 case NETDEV_UNREGISTER:
3195 bond_remove_proc_entry(event_bond);
3197 case NETDEV_REGISTER:
3198 bond_create_proc_entry(event_bond);
3207 static int bond_slave_netdev_event(unsigned long event,
3208 struct net_device *slave_dev)
3210 struct net_device *bond_dev = slave_dev->master;
3211 struct bonding *bond = netdev_priv(bond_dev);
3212 struct slave *slave = NULL;
3215 case NETDEV_UNREGISTER:
3217 if (bond->setup_by_slave)
3218 bond_release_and_destroy(bond_dev, slave_dev);
3220 bond_release(bond_dev, slave_dev);
3225 slave = bond_get_slave_by_dev(bond, slave_dev);
3227 u32 old_speed = slave->speed;
3228 u8 old_duplex = slave->duplex;
3230 bond_update_speed_duplex(slave);
3232 if (bond->params.mode == BOND_MODE_8023AD) {
3233 if (old_speed != slave->speed)
3234 bond_3ad_adapter_speed_changed(slave);
3235 if (old_duplex != slave->duplex)
3236 bond_3ad_adapter_duplex_changed(slave);
3243 * ... Or is it this?
3246 case NETDEV_CHANGEMTU:
3248 * TODO: Should slaves be allowed to
3249 * independently alter their MTU? For
3250 * an active-backup bond, slaves need
3251 * not be the same type of device, so
3252 * MTUs may vary. For other modes,
3253 * slaves arguably should have the
3254 * same MTUs. To do this, we'd need to
3255 * take over the slave's change_mtu
3256 * function for the duration of their
3260 case NETDEV_CHANGENAME:
3262 * TODO: handle changing the primary's name
3265 case NETDEV_FEAT_CHANGE:
3266 bond_compute_features(bond);
3276 * bond_netdev_event: handle netdev notifier chain events.
3278 * This function receives events for the netdev chain. The caller (an
3279 * ioctl handler calling blocking_notifier_call_chain) holds the necessary
3280 * locks for us to safely manipulate the slave devices (RTNL lock,
3283 static int bond_netdev_event(struct notifier_block *this,
3284 unsigned long event, void *ptr)
3286 struct net_device *event_dev = (struct net_device *)ptr;
3288 pr_debug("event_dev: %s, event: %lx\n",
3289 event_dev ? event_dev->name : "None",
3292 if (!(event_dev->priv_flags & IFF_BONDING))
3295 if (event_dev->flags & IFF_MASTER) {
3296 pr_debug("IFF_MASTER\n");
3297 return bond_master_netdev_event(event, event_dev);
3300 if (event_dev->flags & IFF_SLAVE) {
3301 pr_debug("IFF_SLAVE\n");
3302 return bond_slave_netdev_event(event, event_dev);
3309 * bond_inetaddr_event: handle inetaddr notifier chain events.
3311 * We keep track of device IPs primarily to use as source addresses in
3312 * ARP monitor probes (rather than spewing out broadcasts all the time).
3314 * We track one IP for the main device (if it has one), plus one per VLAN.
3316 static int bond_inetaddr_event(struct notifier_block *this, unsigned long event, void *ptr)
3318 struct in_ifaddr *ifa = ptr;
3319 struct net_device *vlan_dev, *event_dev = ifa->ifa_dev->dev;
3320 struct bond_net *bn = net_generic(dev_net(event_dev), bond_net_id);
3321 struct bonding *bond;
3322 struct vlan_entry *vlan;
3324 /* we only care about primary address */
3325 if(ifa->ifa_flags & IFA_F_SECONDARY)
3328 list_for_each_entry(bond, &bn->dev_list, bond_list) {
3329 if (bond->dev == event_dev) {
3332 bond->master_ip = ifa->ifa_local;
3335 bond->master_ip = 0;
3342 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
3343 vlan_dev = __vlan_find_dev_deep(bond->dev,
3345 if (vlan_dev == event_dev) {
3348 vlan->vlan_ip = ifa->ifa_local;
3362 static struct notifier_block bond_netdev_notifier = {
3363 .notifier_call = bond_netdev_event,
3366 static struct notifier_block bond_inetaddr_notifier = {
3367 .notifier_call = bond_inetaddr_event,
3370 /*---------------------------- Hashing Policies -----------------------------*/
3373 * Hash for the output device based upon layer 2 and layer 3 data. If
3374 * the packet is not IP mimic bond_xmit_hash_policy_l2()
3376 static int bond_xmit_hash_policy_l23(struct sk_buff *skb, int count)
3378 struct ethhdr *data = (struct ethhdr *)skb->data;
3379 struct iphdr *iph = ip_hdr(skb);
3381 if (skb->protocol == htons(ETH_P_IP)) {
3382 return ((ntohl(iph->saddr ^ iph->daddr) & 0xffff) ^
3383 (data->h_dest[5] ^ data->h_source[5])) % count;
3386 return (data->h_dest[5] ^ data->h_source[5]) % count;
3390 * Hash for the output device based upon layer 3 and layer 4 data. If
3391 * the packet is a frag or not TCP or UDP, just use layer 3 data. If it is
3392 * altogether not IP, mimic bond_xmit_hash_policy_l2()
3394 static int bond_xmit_hash_policy_l34(struct sk_buff *skb, int count)
3396 struct ethhdr *data = (struct ethhdr *)skb->data;
3397 struct iphdr *iph = ip_hdr(skb);
3398 __be16 *layer4hdr = (__be16 *)((u32 *)iph + iph->ihl);
3401 if (skb->protocol == htons(ETH_P_IP)) {
3402 if (!ip_is_fragment(iph) &&
3403 (iph->protocol == IPPROTO_TCP ||
3404 iph->protocol == IPPROTO_UDP)) {
3405 layer4_xor = ntohs((*layer4hdr ^ *(layer4hdr + 1)));
3407 return (layer4_xor ^
3408 ((ntohl(iph->saddr ^ iph->daddr)) & 0xffff)) % count;
3412 return (data->h_dest[5] ^ data->h_source[5]) % count;
3416 * Hash for the output device based upon layer 2 data
3418 static int bond_xmit_hash_policy_l2(struct sk_buff *skb, int count)
3420 struct ethhdr *data = (struct ethhdr *)skb->data;
3422 return (data->h_dest[5] ^ data->h_source[5]) % count;
3425 /*-------------------------- Device entry points ----------------------------*/
3427 static int bond_open(struct net_device *bond_dev)
3429 struct bonding *bond = netdev_priv(bond_dev);
3430 struct slave *slave;
3433 /* reset slave->backup and slave->inactive */
3434 read_lock(&bond->lock);
3435 if (bond->slave_cnt > 0) {
3436 read_lock(&bond->curr_slave_lock);
3437 bond_for_each_slave(bond, slave, i) {
3438 if ((bond->params.mode == BOND_MODE_ACTIVEBACKUP)
3439 && (slave != bond->curr_active_slave)) {
3440 bond_set_slave_inactive_flags(slave);
3442 bond_set_slave_active_flags(slave);
3445 read_unlock(&bond->curr_slave_lock);
3447 read_unlock(&bond->lock);
3449 INIT_DELAYED_WORK(&bond->mcast_work, bond_resend_igmp_join_requests_delayed);
3451 if (bond_is_lb(bond)) {
3452 /* bond_alb_initialize must be called before the timer
3455 if (bond_alb_initialize(bond, (bond->params.mode == BOND_MODE_ALB))) {
3456 /* something went wrong - fail the open operation */
3460 INIT_DELAYED_WORK(&bond->alb_work, bond_alb_monitor);
3461 queue_delayed_work(bond->wq, &bond->alb_work, 0);
3464 if (bond->params.miimon) { /* link check interval, in milliseconds. */
3465 INIT_DELAYED_WORK(&bond->mii_work, bond_mii_monitor);
3466 queue_delayed_work(bond->wq, &bond->mii_work, 0);
3469 if (bond->params.arp_interval) { /* arp interval, in milliseconds. */
3470 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP)
3471 INIT_DELAYED_WORK(&bond->arp_work,
3472 bond_activebackup_arp_mon);
3474 INIT_DELAYED_WORK(&bond->arp_work,
3475 bond_loadbalance_arp_mon);
3477 queue_delayed_work(bond->wq, &bond->arp_work, 0);
3478 if (bond->params.arp_validate)
3479 bond->recv_probe = bond_arp_rcv;
3482 if (bond->params.mode == BOND_MODE_8023AD) {
3483 INIT_DELAYED_WORK(&bond->ad_work, bond_3ad_state_machine_handler);
3484 queue_delayed_work(bond->wq, &bond->ad_work, 0);
3485 /* register to receive LACPDUs */
3486 bond->recv_probe = bond_3ad_lacpdu_recv;
3487 bond_3ad_initiate_agg_selection(bond, 1);
3493 static int bond_close(struct net_device *bond_dev)
3495 struct bonding *bond = netdev_priv(bond_dev);
3497 write_lock_bh(&bond->lock);
3499 bond->send_peer_notif = 0;
3501 write_unlock_bh(&bond->lock);
3503 if (bond->params.miimon) { /* link check interval, in milliseconds. */
3504 cancel_delayed_work_sync(&bond->mii_work);
3507 if (bond->params.arp_interval) { /* arp interval, in milliseconds. */
3508 cancel_delayed_work_sync(&bond->arp_work);
3511 switch (bond->params.mode) {
3512 case BOND_MODE_8023AD:
3513 cancel_delayed_work_sync(&bond->ad_work);
3517 cancel_delayed_work_sync(&bond->alb_work);
3523 if (delayed_work_pending(&bond->mcast_work))
3524 cancel_delayed_work_sync(&bond->mcast_work);
3526 if (bond_is_lb(bond)) {
3527 /* Must be called only after all
3528 * slaves have been released
3530 bond_alb_deinitialize(bond);
3532 bond->recv_probe = NULL;
3537 static struct rtnl_link_stats64 *bond_get_stats(struct net_device *bond_dev,
3538 struct rtnl_link_stats64 *stats)
3540 struct bonding *bond = netdev_priv(bond_dev);
3541 struct rtnl_link_stats64 temp;
3542 struct slave *slave;
3545 memset(stats, 0, sizeof(*stats));
3547 read_lock_bh(&bond->lock);
3549 bond_for_each_slave(bond, slave, i) {
3550 const struct rtnl_link_stats64 *sstats =
3551 dev_get_stats(slave->dev, &temp);
3553 stats->rx_packets += sstats->rx_packets;
3554 stats->rx_bytes += sstats->rx_bytes;
3555 stats->rx_errors += sstats->rx_errors;
3556 stats->rx_dropped += sstats->rx_dropped;
3558 stats->tx_packets += sstats->tx_packets;
3559 stats->tx_bytes += sstats->tx_bytes;
3560 stats->tx_errors += sstats->tx_errors;
3561 stats->tx_dropped += sstats->tx_dropped;
3563 stats->multicast += sstats->multicast;
3564 stats->collisions += sstats->collisions;
3566 stats->rx_length_errors += sstats->rx_length_errors;
3567 stats->rx_over_errors += sstats->rx_over_errors;
3568 stats->rx_crc_errors += sstats->rx_crc_errors;
3569 stats->rx_frame_errors += sstats->rx_frame_errors;
3570 stats->rx_fifo_errors += sstats->rx_fifo_errors;
3571 stats->rx_missed_errors += sstats->rx_missed_errors;
3573 stats->tx_aborted_errors += sstats->tx_aborted_errors;
3574 stats->tx_carrier_errors += sstats->tx_carrier_errors;
3575 stats->tx_fifo_errors += sstats->tx_fifo_errors;
3576 stats->tx_heartbeat_errors += sstats->tx_heartbeat_errors;
3577 stats->tx_window_errors += sstats->tx_window_errors;
3580 read_unlock_bh(&bond->lock);
3585 static int bond_do_ioctl(struct net_device *bond_dev, struct ifreq *ifr, int cmd)
3587 struct net_device *slave_dev = NULL;
3588 struct ifbond k_binfo;
3589 struct ifbond __user *u_binfo = NULL;
3590 struct ifslave k_sinfo;
3591 struct ifslave __user *u_sinfo = NULL;
3592 struct mii_ioctl_data *mii = NULL;
3595 pr_debug("bond_ioctl: master=%s, cmd=%d\n", bond_dev->name, cmd);
3607 * We do this again just in case we were called by SIOCGMIIREG
3608 * instead of SIOCGMIIPHY.
3615 if (mii->reg_num == 1) {
3616 struct bonding *bond = netdev_priv(bond_dev);
3618 read_lock(&bond->lock);
3619 read_lock(&bond->curr_slave_lock);
3620 if (netif_carrier_ok(bond->dev))
3621 mii->val_out = BMSR_LSTATUS;
3623 read_unlock(&bond->curr_slave_lock);
3624 read_unlock(&bond->lock);
3628 case BOND_INFO_QUERY_OLD:
3629 case SIOCBONDINFOQUERY:
3630 u_binfo = (struct ifbond __user *)ifr->ifr_data;
3632 if (copy_from_user(&k_binfo, u_binfo, sizeof(ifbond)))
3635 res = bond_info_query(bond_dev, &k_binfo);
3637 copy_to_user(u_binfo, &k_binfo, sizeof(ifbond)))
3641 case BOND_SLAVE_INFO_QUERY_OLD:
3642 case SIOCBONDSLAVEINFOQUERY:
3643 u_sinfo = (struct ifslave __user *)ifr->ifr_data;
3645 if (copy_from_user(&k_sinfo, u_sinfo, sizeof(ifslave)))
3648 res = bond_slave_info_query(bond_dev, &k_sinfo);
3650 copy_to_user(u_sinfo, &k_sinfo, sizeof(ifslave)))
3659 if (!capable(CAP_NET_ADMIN))
3662 slave_dev = dev_get_by_name(dev_net(bond_dev), ifr->ifr_slave);
3664 pr_debug("slave_dev=%p:\n", slave_dev);
3669 pr_debug("slave_dev->name=%s:\n", slave_dev->name);
3671 case BOND_ENSLAVE_OLD:
3672 case SIOCBONDENSLAVE:
3673 res = bond_enslave(bond_dev, slave_dev);
3675 case BOND_RELEASE_OLD:
3676 case SIOCBONDRELEASE:
3677 res = bond_release(bond_dev, slave_dev);
3679 case BOND_SETHWADDR_OLD:
3680 case SIOCBONDSETHWADDR:
3681 res = bond_sethwaddr(bond_dev, slave_dev);
3683 case BOND_CHANGE_ACTIVE_OLD:
3684 case SIOCBONDCHANGEACTIVE:
3685 res = bond_ioctl_change_active(bond_dev, slave_dev);
3697 static bool bond_addr_in_mc_list(unsigned char *addr,
3698 struct netdev_hw_addr_list *list,
3701 struct netdev_hw_addr *ha;
3703 netdev_hw_addr_list_for_each(ha, list)
3704 if (!memcmp(ha->addr, addr, addrlen))
3710 static void bond_change_rx_flags(struct net_device *bond_dev, int change)
3712 struct bonding *bond = netdev_priv(bond_dev);
3714 if (change & IFF_PROMISC)
3715 bond_set_promiscuity(bond,
3716 bond_dev->flags & IFF_PROMISC ? 1 : -1);
3718 if (change & IFF_ALLMULTI)
3719 bond_set_allmulti(bond,
3720 bond_dev->flags & IFF_ALLMULTI ? 1 : -1);
3723 static void bond_set_multicast_list(struct net_device *bond_dev)
3725 struct bonding *bond = netdev_priv(bond_dev);
3726 struct netdev_hw_addr *ha;
3729 read_lock(&bond->lock);
3731 /* looking for addresses to add to slaves' mc list */
3732 netdev_for_each_mc_addr(ha, bond_dev) {
3733 found = bond_addr_in_mc_list(ha->addr, &bond->mc_list,
3734 bond_dev->addr_len);
3736 bond_mc_add(bond, ha->addr);
3739 /* looking for addresses to delete from slaves' list */
3740 netdev_hw_addr_list_for_each(ha, &bond->mc_list) {
3741 found = bond_addr_in_mc_list(ha->addr, &bond_dev->mc,
3742 bond_dev->addr_len);
3744 bond_mc_del(bond, ha->addr);
3747 /* save master's multicast list */
3748 __hw_addr_flush(&bond->mc_list);
3749 __hw_addr_add_multiple(&bond->mc_list, &bond_dev->mc,
3750 bond_dev->addr_len, NETDEV_HW_ADDR_T_MULTICAST);
3752 read_unlock(&bond->lock);
3755 static int bond_neigh_setup(struct net_device *dev, struct neigh_parms *parms)
3757 struct bonding *bond = netdev_priv(dev);
3758 struct slave *slave = bond->first_slave;
3761 const struct net_device_ops *slave_ops
3762 = slave->dev->netdev_ops;
3763 if (slave_ops->ndo_neigh_setup)
3764 return slave_ops->ndo_neigh_setup(slave->dev, parms);
3770 * Change the MTU of all of a master's slaves to match the master
3772 static int bond_change_mtu(struct net_device *bond_dev, int new_mtu)
3774 struct bonding *bond = netdev_priv(bond_dev);
3775 struct slave *slave, *stop_at;
3779 pr_debug("bond=%p, name=%s, new_mtu=%d\n", bond,
3780 (bond_dev ? bond_dev->name : "None"), new_mtu);
3782 /* Can't hold bond->lock with bh disabled here since
3783 * some base drivers panic. On the other hand we can't
3784 * hold bond->lock without bh disabled because we'll
3785 * deadlock. The only solution is to rely on the fact
3786 * that we're under rtnl_lock here, and the slaves
3787 * list won't change. This doesn't solve the problem
3788 * of setting the slave's MTU while it is
3789 * transmitting, but the assumption is that the base
3790 * driver can handle that.
3792 * TODO: figure out a way to safely iterate the slaves
3793 * list, but without holding a lock around the actual
3794 * call to the base driver.
3797 bond_for_each_slave(bond, slave, i) {
3798 pr_debug("s %p s->p %p c_m %p\n",
3801 slave->dev->netdev_ops->ndo_change_mtu);
3803 res = dev_set_mtu(slave->dev, new_mtu);
3806 /* If we failed to set the slave's mtu to the new value
3807 * we must abort the operation even in ACTIVE_BACKUP
3808 * mode, because if we allow the backup slaves to have
3809 * different mtu values than the active slave we'll
3810 * need to change their mtu when doing a failover. That
3811 * means changing their mtu from timer context, which
3812 * is probably not a good idea.
3814 pr_debug("err %d %s\n", res, slave->dev->name);
3819 bond_dev->mtu = new_mtu;
3824 /* unwind from head to the slave that failed */
3826 bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) {
3829 tmp_res = dev_set_mtu(slave->dev, bond_dev->mtu);
3831 pr_debug("unwind err %d dev %s\n",
3832 tmp_res, slave->dev->name);
3842 * Note that many devices must be down to change the HW address, and
3843 * downing the master releases all slaves. We can make bonds full of
3844 * bonding devices to test this, however.
3846 static int bond_set_mac_address(struct net_device *bond_dev, void *addr)
3848 struct bonding *bond = netdev_priv(bond_dev);
3849 struct sockaddr *sa = addr, tmp_sa;
3850 struct slave *slave, *stop_at;
3854 if (bond->params.mode == BOND_MODE_ALB)
3855 return bond_alb_set_mac_address(bond_dev, addr);
3858 pr_debug("bond=%p, name=%s\n",
3859 bond, bond_dev ? bond_dev->name : "None");
3862 * If fail_over_mac is set to active, do nothing and return
3863 * success. Returning an error causes ifenslave to fail.
3865 if (bond->params.fail_over_mac == BOND_FOM_ACTIVE)
3868 if (!is_valid_ether_addr(sa->sa_data))
3869 return -EADDRNOTAVAIL;
3871 /* Can't hold bond->lock with bh disabled here since
3872 * some base drivers panic. On the other hand we can't
3873 * hold bond->lock without bh disabled because we'll
3874 * deadlock. The only solution is to rely on the fact
3875 * that we're under rtnl_lock here, and the slaves
3876 * list won't change. This doesn't solve the problem
3877 * of setting the slave's hw address while it is
3878 * transmitting, but the assumption is that the base
3879 * driver can handle that.
3881 * TODO: figure out a way to safely iterate the slaves
3882 * list, but without holding a lock around the actual
3883 * call to the base driver.
3886 bond_for_each_slave(bond, slave, i) {
3887 const struct net_device_ops *slave_ops = slave->dev->netdev_ops;
3888 pr_debug("slave %p %s\n", slave, slave->dev->name);
3890 if (slave_ops->ndo_set_mac_address == NULL) {
3892 pr_debug("EOPNOTSUPP %s\n", slave->dev->name);
3896 res = dev_set_mac_address(slave->dev, addr);
3898 /* TODO: consider downing the slave
3900 * User should expect communications
3901 * breakage anyway until ARP finish
3904 pr_debug("err %d %s\n", res, slave->dev->name);
3910 memcpy(bond_dev->dev_addr, sa->sa_data, bond_dev->addr_len);
3914 memcpy(tmp_sa.sa_data, bond_dev->dev_addr, bond_dev->addr_len);
3915 tmp_sa.sa_family = bond_dev->type;
3917 /* unwind from head to the slave that failed */
3919 bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) {
3922 tmp_res = dev_set_mac_address(slave->dev, &tmp_sa);
3924 pr_debug("unwind err %d dev %s\n",
3925 tmp_res, slave->dev->name);
3932 static int bond_xmit_roundrobin(struct sk_buff *skb, struct net_device *bond_dev)
3934 struct bonding *bond = netdev_priv(bond_dev);
3935 struct slave *slave, *start_at;
3936 int i, slave_no, res = 1;
3937 struct iphdr *iph = ip_hdr(skb);
3940 * Start with the curr_active_slave that joined the bond as the
3941 * default for sending IGMP traffic. For failover purposes one
3942 * needs to maintain some consistency for the interface that will
3943 * send the join/membership reports. The curr_active_slave found
3944 * will send all of this type of traffic.
3946 if ((iph->protocol == IPPROTO_IGMP) &&
3947 (skb->protocol == htons(ETH_P_IP))) {
3949 read_lock(&bond->curr_slave_lock);
3950 slave = bond->curr_active_slave;
3951 read_unlock(&bond->curr_slave_lock);
3957 * Concurrent TX may collide on rr_tx_counter; we accept
3958 * that as being rare enough not to justify using an
3961 slave_no = bond->rr_tx_counter++ % bond->slave_cnt;
3963 bond_for_each_slave(bond, slave, i) {
3971 bond_for_each_slave_from(bond, slave, i, start_at) {
3972 if (IS_UP(slave->dev) &&
3973 (slave->link == BOND_LINK_UP) &&
3974 bond_is_active_slave(slave)) {
3975 res = bond_dev_queue_xmit(bond, skb, slave->dev);
3982 /* no suitable interface, frame not sent */
3986 return NETDEV_TX_OK;
3991 * in active-backup mode, we know that bond->curr_active_slave is always valid if
3992 * the bond has a usable interface.
3994 static int bond_xmit_activebackup(struct sk_buff *skb, struct net_device *bond_dev)
3996 struct bonding *bond = netdev_priv(bond_dev);
3999 read_lock(&bond->curr_slave_lock);
4001 if (bond->curr_active_slave)
4002 res = bond_dev_queue_xmit(bond, skb,
4003 bond->curr_active_slave->dev);
4006 /* no suitable interface, frame not sent */
4009 read_unlock(&bond->curr_slave_lock);
4011 return NETDEV_TX_OK;
4015 * In bond_xmit_xor() , we determine the output device by using a pre-
4016 * determined xmit_hash_policy(), If the selected device is not enabled,
4017 * find the next active slave.
4019 static int bond_xmit_xor(struct sk_buff *skb, struct net_device *bond_dev)
4021 struct bonding *bond = netdev_priv(bond_dev);
4022 struct slave *slave, *start_at;
4027 slave_no = bond->xmit_hash_policy(skb, bond->slave_cnt);
4029 bond_for_each_slave(bond, slave, i) {
4037 bond_for_each_slave_from(bond, slave, i, start_at) {
4038 if (IS_UP(slave->dev) &&
4039 (slave->link == BOND_LINK_UP) &&
4040 bond_is_active_slave(slave)) {
4041 res = bond_dev_queue_xmit(bond, skb, slave->dev);
4047 /* no suitable interface, frame not sent */
4051 return NETDEV_TX_OK;
4055 * in broadcast mode, we send everything to all usable interfaces.
4057 static int bond_xmit_broadcast(struct sk_buff *skb, struct net_device *bond_dev)
4059 struct bonding *bond = netdev_priv(bond_dev);
4060 struct slave *slave, *start_at;
4061 struct net_device *tx_dev = NULL;
4065 read_lock(&bond->curr_slave_lock);
4066 start_at = bond->curr_active_slave;
4067 read_unlock(&bond->curr_slave_lock);
4072 bond_for_each_slave_from(bond, slave, i, start_at) {
4073 if (IS_UP(slave->dev) &&
4074 (slave->link == BOND_LINK_UP) &&
4075 bond_is_active_slave(slave)) {
4077 struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC);
4079 pr_err("%s: Error: bond_xmit_broadcast(): skb_clone() failed\n",
4084 res = bond_dev_queue_xmit(bond, skb2, tx_dev);
4086 dev_kfree_skb(skb2);
4090 tx_dev = slave->dev;
4095 res = bond_dev_queue_xmit(bond, skb, tx_dev);
4099 /* no suitable interface, frame not sent */
4102 /* frame sent to all suitable interfaces */
4103 return NETDEV_TX_OK;
4106 /*------------------------- Device initialization ---------------------------*/
4108 static void bond_set_xmit_hash_policy(struct bonding *bond)
4110 switch (bond->params.xmit_policy) {
4111 case BOND_XMIT_POLICY_LAYER23:
4112 bond->xmit_hash_policy = bond_xmit_hash_policy_l23;
4114 case BOND_XMIT_POLICY_LAYER34:
4115 bond->xmit_hash_policy = bond_xmit_hash_policy_l34;
4117 case BOND_XMIT_POLICY_LAYER2:
4119 bond->xmit_hash_policy = bond_xmit_hash_policy_l2;
4125 * Lookup the slave that corresponds to a qid
4127 static inline int bond_slave_override(struct bonding *bond,
4128 struct sk_buff *skb)
4131 struct slave *slave = NULL;
4132 struct slave *check_slave;
4134 if (!skb->queue_mapping)
4137 /* Find out if any slaves have the same mapping as this skb. */
4138 bond_for_each_slave(bond, check_slave, i) {
4139 if (check_slave->queue_id == skb->queue_mapping) {
4140 slave = check_slave;
4145 /* If the slave isn't UP, use default transmit policy. */
4146 if (slave && slave->queue_id && IS_UP(slave->dev) &&
4147 (slave->link == BOND_LINK_UP)) {
4148 res = bond_dev_queue_xmit(bond, skb, slave->dev);
4155 static u16 bond_select_queue(struct net_device *dev, struct sk_buff *skb)
4158 * This helper function exists to help dev_pick_tx get the correct
4159 * destination queue. Using a helper function skips a call to
4160 * skb_tx_hash and will put the skbs in the queue we expect on their
4161 * way down to the bonding driver.
4163 u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
4166 * Save the original txq to restore before passing to the driver
4168 qdisc_skb_cb(skb)->bond_queue_mapping = skb->queue_mapping;
4170 if (unlikely(txq >= dev->real_num_tx_queues)) {
4172 txq -= dev->real_num_tx_queues;
4173 } while (txq >= dev->real_num_tx_queues);
4178 static netdev_tx_t __bond_start_xmit(struct sk_buff *skb, struct net_device *dev)
4180 struct bonding *bond = netdev_priv(dev);
4182 if (TX_QUEUE_OVERRIDE(bond->params.mode)) {
4183 if (!bond_slave_override(bond, skb))
4184 return NETDEV_TX_OK;
4187 switch (bond->params.mode) {
4188 case BOND_MODE_ROUNDROBIN:
4189 return bond_xmit_roundrobin(skb, dev);
4190 case BOND_MODE_ACTIVEBACKUP:
4191 return bond_xmit_activebackup(skb, dev);
4193 return bond_xmit_xor(skb, dev);
4194 case BOND_MODE_BROADCAST:
4195 return bond_xmit_broadcast(skb, dev);
4196 case BOND_MODE_8023AD:
4197 return bond_3ad_xmit_xor(skb, dev);
4200 return bond_alb_xmit(skb, dev);
4202 /* Should never happen, mode already checked */
4203 pr_err("%s: Error: Unknown bonding mode %d\n",
4204 dev->name, bond->params.mode);
4207 return NETDEV_TX_OK;
4211 static netdev_tx_t bond_start_xmit(struct sk_buff *skb, struct net_device *dev)
4213 struct bonding *bond = netdev_priv(dev);
4214 netdev_tx_t ret = NETDEV_TX_OK;
4217 * If we risk deadlock from transmitting this in the
4218 * netpoll path, tell netpoll to queue the frame for later tx
4220 if (is_netpoll_tx_blocked(dev))
4221 return NETDEV_TX_BUSY;
4223 read_lock(&bond->lock);
4225 if (bond->slave_cnt)
4226 ret = __bond_start_xmit(skb, dev);
4230 read_unlock(&bond->lock);
4236 * set bond mode specific net device operations
4238 void bond_set_mode_ops(struct bonding *bond, int mode)
4240 struct net_device *bond_dev = bond->dev;
4243 case BOND_MODE_ROUNDROBIN:
4245 case BOND_MODE_ACTIVEBACKUP:
4248 bond_set_xmit_hash_policy(bond);
4250 case BOND_MODE_BROADCAST:
4252 case BOND_MODE_8023AD:
4253 bond_set_xmit_hash_policy(bond);
4260 /* Should never happen, mode already checked */
4261 pr_err("%s: Error: Unknown bonding mode %d\n",
4262 bond_dev->name, mode);
4267 static void bond_ethtool_get_drvinfo(struct net_device *bond_dev,
4268 struct ethtool_drvinfo *drvinfo)
4270 strncpy(drvinfo->driver, DRV_NAME, 32);
4271 strncpy(drvinfo->version, DRV_VERSION, 32);
4272 snprintf(drvinfo->fw_version, 32, "%d", BOND_ABI_VERSION);
4275 static const struct ethtool_ops bond_ethtool_ops = {
4276 .get_drvinfo = bond_ethtool_get_drvinfo,
4277 .get_link = ethtool_op_get_link,
4280 static const struct net_device_ops bond_netdev_ops = {
4281 .ndo_init = bond_init,
4282 .ndo_uninit = bond_uninit,
4283 .ndo_open = bond_open,
4284 .ndo_stop = bond_close,
4285 .ndo_start_xmit = bond_start_xmit,
4286 .ndo_select_queue = bond_select_queue,
4287 .ndo_get_stats64 = bond_get_stats,
4288 .ndo_do_ioctl = bond_do_ioctl,
4289 .ndo_change_rx_flags = bond_change_rx_flags,
4290 .ndo_set_rx_mode = bond_set_multicast_list,
4291 .ndo_change_mtu = bond_change_mtu,
4292 .ndo_set_mac_address = bond_set_mac_address,
4293 .ndo_neigh_setup = bond_neigh_setup,
4294 .ndo_vlan_rx_add_vid = bond_vlan_rx_add_vid,
4295 .ndo_vlan_rx_kill_vid = bond_vlan_rx_kill_vid,
4296 #ifdef CONFIG_NET_POLL_CONTROLLER
4297 .ndo_netpoll_setup = bond_netpoll_setup,
4298 .ndo_netpoll_cleanup = bond_netpoll_cleanup,
4299 .ndo_poll_controller = bond_poll_controller,
4301 .ndo_add_slave = bond_enslave,
4302 .ndo_del_slave = bond_release,
4303 .ndo_fix_features = bond_fix_features,
4306 static void bond_destructor(struct net_device *bond_dev)
4308 struct bonding *bond = netdev_priv(bond_dev);
4310 destroy_workqueue(bond->wq);
4311 free_netdev(bond_dev);
4314 static void bond_setup(struct net_device *bond_dev)
4316 struct bonding *bond = netdev_priv(bond_dev);
4318 /* initialize rwlocks */
4319 rwlock_init(&bond->lock);
4320 rwlock_init(&bond->curr_slave_lock);
4322 bond->params = bonding_defaults;
4324 /* Initialize pointers */
4325 bond->dev = bond_dev;
4326 INIT_LIST_HEAD(&bond->vlan_list);
4328 /* Initialize the device entry points */
4329 ether_setup(bond_dev);
4330 bond_dev->netdev_ops = &bond_netdev_ops;
4331 bond_dev->ethtool_ops = &bond_ethtool_ops;
4332 bond_set_mode_ops(bond, bond->params.mode);
4334 bond_dev->destructor = bond_destructor;
4336 /* Initialize the device options */
4337 bond_dev->tx_queue_len = 0;
4338 bond_dev->flags |= IFF_MASTER|IFF_MULTICAST;
4339 bond_dev->priv_flags |= IFF_BONDING;
4340 bond_dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
4342 /* At first, we block adding VLANs. That's the only way to
4343 * prevent problems that occur when adding VLANs over an
4344 * empty bond. The block will be removed once non-challenged
4345 * slaves are enslaved.
4347 bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
4349 /* don't acquire bond device's netif_tx_lock when
4351 bond_dev->features |= NETIF_F_LLTX;
4353 /* By default, we declare the bond to be fully
4354 * VLAN hardware accelerated capable. Special
4355 * care is taken in the various xmit functions
4356 * when there are slaves that are not hw accel
4360 bond_dev->hw_features = BOND_VLAN_FEATURES |
4361 NETIF_F_HW_VLAN_TX |
4362 NETIF_F_HW_VLAN_RX |
4363 NETIF_F_HW_VLAN_FILTER;
4365 bond_dev->hw_features &= ~(NETIF_F_ALL_CSUM & ~NETIF_F_NO_CSUM);
4366 bond_dev->features |= bond_dev->hw_features;
4369 static void bond_work_cancel_all(struct bonding *bond)
4371 if (bond->params.miimon && delayed_work_pending(&bond->mii_work))
4372 cancel_delayed_work_sync(&bond->mii_work);
4374 if (bond->params.arp_interval && delayed_work_pending(&bond->arp_work))
4375 cancel_delayed_work_sync(&bond->arp_work);
4377 if (bond->params.mode == BOND_MODE_ALB &&
4378 delayed_work_pending(&bond->alb_work))
4379 cancel_delayed_work_sync(&bond->alb_work);
4381 if (bond->params.mode == BOND_MODE_8023AD &&
4382 delayed_work_pending(&bond->ad_work))
4383 cancel_delayed_work_sync(&bond->ad_work);
4385 if (delayed_work_pending(&bond->mcast_work))
4386 cancel_delayed_work_sync(&bond->mcast_work);
4390 * Destroy a bonding device.
4391 * Must be under rtnl_lock when this function is called.
4393 static void bond_uninit(struct net_device *bond_dev)
4395 struct bonding *bond = netdev_priv(bond_dev);
4396 struct vlan_entry *vlan, *tmp;
4398 bond_netpoll_cleanup(bond_dev);
4400 /* Release the bonded slaves */
4401 bond_release_all(bond_dev);
4403 list_del(&bond->bond_list);
4405 bond_work_cancel_all(bond);
4407 bond_debug_unregister(bond);
4409 __hw_addr_flush(&bond->mc_list);
4411 list_for_each_entry_safe(vlan, tmp, &bond->vlan_list, vlan_list) {
4412 list_del(&vlan->vlan_list);
4417 /*------------------------- Module initialization ---------------------------*/
4420 * Convert string input module parms. Accept either the
4421 * number of the mode or its string name. A bit complicated because
4422 * some mode names are substrings of other names, and calls from sysfs
4423 * may have whitespace in the name (trailing newlines, for example).
4425 int bond_parse_parm(const char *buf, const struct bond_parm_tbl *tbl)
4427 int modeint = -1, i, rv;
4428 char *p, modestr[BOND_MAX_MODENAME_LEN + 1] = { 0, };
4430 for (p = (char *)buf; *p; p++)
4431 if (!(isdigit(*p) || isspace(*p)))
4435 rv = sscanf(buf, "%20s", modestr);
4437 rv = sscanf(buf, "%d", &modeint);
4442 for (i = 0; tbl[i].modename; i++) {
4443 if (modeint == tbl[i].mode)
4445 if (strcmp(modestr, tbl[i].modename) == 0)
4452 static int bond_check_params(struct bond_params *params)
4454 int arp_validate_value, fail_over_mac_value, primary_reselect_value;
4457 * Convert string parameters.
4460 bond_mode = bond_parse_parm(mode, bond_mode_tbl);
4461 if (bond_mode == -1) {
4462 pr_err("Error: Invalid bonding mode \"%s\"\n",
4463 mode == NULL ? "NULL" : mode);
4468 if (xmit_hash_policy) {
4469 if ((bond_mode != BOND_MODE_XOR) &&
4470 (bond_mode != BOND_MODE_8023AD)) {
4471 pr_info("xmit_hash_policy param is irrelevant in mode %s\n",
4472 bond_mode_name(bond_mode));
4474 xmit_hashtype = bond_parse_parm(xmit_hash_policy,
4476 if (xmit_hashtype == -1) {
4477 pr_err("Error: Invalid xmit_hash_policy \"%s\"\n",
4478 xmit_hash_policy == NULL ? "NULL" :
4486 if (bond_mode != BOND_MODE_8023AD) {
4487 pr_info("lacp_rate param is irrelevant in mode %s\n",
4488 bond_mode_name(bond_mode));
4490 lacp_fast = bond_parse_parm(lacp_rate, bond_lacp_tbl);
4491 if (lacp_fast == -1) {
4492 pr_err("Error: Invalid lacp rate \"%s\"\n",
4493 lacp_rate == NULL ? "NULL" : lacp_rate);
4500 params->ad_select = bond_parse_parm(ad_select, ad_select_tbl);
4501 if (params->ad_select == -1) {
4502 pr_err("Error: Invalid ad_select \"%s\"\n",
4503 ad_select == NULL ? "NULL" : ad_select);
4507 if (bond_mode != BOND_MODE_8023AD) {
4508 pr_warning("ad_select param only affects 802.3ad mode\n");
4511 params->ad_select = BOND_AD_STABLE;
4514 if (max_bonds < 0) {
4515 pr_warning("Warning: max_bonds (%d) not in range %d-%d, so it was reset to BOND_DEFAULT_MAX_BONDS (%d)\n",
4516 max_bonds, 0, INT_MAX, BOND_DEFAULT_MAX_BONDS);
4517 max_bonds = BOND_DEFAULT_MAX_BONDS;
4521 pr_warning("Warning: miimon module parameter (%d), not in range 0-%d, so it was reset to %d\n",
4522 miimon, INT_MAX, BOND_LINK_MON_INTERV);
4523 miimon = BOND_LINK_MON_INTERV;
4527 pr_warning("Warning: updelay module parameter (%d), not in range 0-%d, so it was reset to 0\n",
4532 if (downdelay < 0) {
4533 pr_warning("Warning: downdelay module parameter (%d), not in range 0-%d, so it was reset to 0\n",
4534 downdelay, INT_MAX);
4538 if ((use_carrier != 0) && (use_carrier != 1)) {
4539 pr_warning("Warning: use_carrier module parameter (%d), not of valid value (0/1), so it was set to 1\n",
4544 if (num_peer_notif < 0 || num_peer_notif > 255) {
4545 pr_warning("Warning: num_grat_arp/num_unsol_na (%d) not in range 0-255 so it was reset to 1\n",
4550 /* reset values for 802.3ad */
4551 if (bond_mode == BOND_MODE_8023AD) {
4553 pr_warning("Warning: miimon must be specified, otherwise bonding will not detect link failure, speed and duplex which are essential for 802.3ad operation\n");
4554 pr_warning("Forcing miimon to 100msec\n");
4559 if (tx_queues < 1 || tx_queues > 255) {
4560 pr_warning("Warning: tx_queues (%d) should be between "
4561 "1 and 255, resetting to %d\n",
4562 tx_queues, BOND_DEFAULT_TX_QUEUES);
4563 tx_queues = BOND_DEFAULT_TX_QUEUES;
4566 if ((all_slaves_active != 0) && (all_slaves_active != 1)) {
4567 pr_warning("Warning: all_slaves_active module parameter (%d), "
4568 "not of valid value (0/1), so it was set to "
4569 "0\n", all_slaves_active);
4570 all_slaves_active = 0;
4573 if (resend_igmp < 0 || resend_igmp > 255) {
4574 pr_warning("Warning: resend_igmp (%d) should be between "
4575 "0 and 255, resetting to %d\n",
4576 resend_igmp, BOND_DEFAULT_RESEND_IGMP);
4577 resend_igmp = BOND_DEFAULT_RESEND_IGMP;
4580 /* reset values for TLB/ALB */
4581 if ((bond_mode == BOND_MODE_TLB) ||
4582 (bond_mode == BOND_MODE_ALB)) {
4584 pr_warning("Warning: miimon must be specified, otherwise bonding will not detect link failure and link speed which are essential for TLB/ALB load balancing\n");
4585 pr_warning("Forcing miimon to 100msec\n");
4590 if (bond_mode == BOND_MODE_ALB) {
4591 pr_notice("In ALB mode you might experience client disconnections upon reconnection of a link if the bonding module updelay parameter (%d msec) is incompatible with the forwarding delay time of the switch\n",
4596 if (updelay || downdelay) {
4597 /* just warn the user the up/down delay will have
4598 * no effect since miimon is zero...
4600 pr_warning("Warning: miimon module parameter not set and updelay (%d) or downdelay (%d) module parameter is set; updelay and downdelay have no effect unless miimon is set\n",
4601 updelay, downdelay);
4604 /* don't allow arp monitoring */
4606 pr_warning("Warning: miimon (%d) and arp_interval (%d) can't be used simultaneously, disabling ARP monitoring\n",
4607 miimon, arp_interval);
4611 if ((updelay % miimon) != 0) {
4612 pr_warning("Warning: updelay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
4614 (updelay / miimon) * miimon);
4619 if ((downdelay % miimon) != 0) {
4620 pr_warning("Warning: downdelay (%d) is not a multiple of miimon (%d), downdelay rounded to %d ms\n",
4622 (downdelay / miimon) * miimon);
4625 downdelay /= miimon;
4628 if (arp_interval < 0) {
4629 pr_warning("Warning: arp_interval module parameter (%d) , not in range 0-%d, so it was reset to %d\n",
4630 arp_interval, INT_MAX, BOND_LINK_ARP_INTERV);
4631 arp_interval = BOND_LINK_ARP_INTERV;
4634 for (arp_ip_count = 0;
4635 (arp_ip_count < BOND_MAX_ARP_TARGETS) && arp_ip_target[arp_ip_count];
4637 /* not complete check, but should be good enough to
4639 if (!isdigit(arp_ip_target[arp_ip_count][0])) {
4640 pr_warning("Warning: bad arp_ip_target module parameter (%s), ARP monitoring will not be performed\n",
4641 arp_ip_target[arp_ip_count]);
4644 __be32 ip = in_aton(arp_ip_target[arp_ip_count]);
4645 arp_target[arp_ip_count] = ip;
4649 if (arp_interval && !arp_ip_count) {
4650 /* don't allow arping if no arp_ip_target given... */
4651 pr_warning("Warning: arp_interval module parameter (%d) specified without providing an arp_ip_target parameter, arp_interval was reset to 0\n",
4657 if (bond_mode != BOND_MODE_ACTIVEBACKUP) {
4658 pr_err("arp_validate only supported in active-backup mode\n");
4661 if (!arp_interval) {
4662 pr_err("arp_validate requires arp_interval\n");
4666 arp_validate_value = bond_parse_parm(arp_validate,
4668 if (arp_validate_value == -1) {
4669 pr_err("Error: invalid arp_validate \"%s\"\n",
4670 arp_validate == NULL ? "NULL" : arp_validate);
4674 arp_validate_value = 0;
4677 pr_info("MII link monitoring set to %d ms\n", miimon);
4678 } else if (arp_interval) {
4681 pr_info("ARP monitoring set to %d ms, validate %s, with %d target(s):",
4683 arp_validate_tbl[arp_validate_value].modename,
4686 for (i = 0; i < arp_ip_count; i++)
4687 pr_info(" %s", arp_ip_target[i]);
4691 } else if (max_bonds) {
4692 /* miimon and arp_interval not set, we need one so things
4693 * work as expected, see bonding.txt for details
4695 pr_debug("Warning: either miimon or arp_interval and arp_ip_target module parameters must be specified, otherwise bonding will not detect link failures! see bonding.txt for details.\n");
4698 if (primary && !USES_PRIMARY(bond_mode)) {
4699 /* currently, using a primary only makes sense
4700 * in active backup, TLB or ALB modes
4702 pr_warning("Warning: %s primary device specified but has no effect in %s mode\n",
4703 primary, bond_mode_name(bond_mode));
4707 if (primary && primary_reselect) {
4708 primary_reselect_value = bond_parse_parm(primary_reselect,
4710 if (primary_reselect_value == -1) {
4711 pr_err("Error: Invalid primary_reselect \"%s\"\n",
4713 NULL ? "NULL" : primary_reselect);
4717 primary_reselect_value = BOND_PRI_RESELECT_ALWAYS;
4720 if (fail_over_mac) {
4721 fail_over_mac_value = bond_parse_parm(fail_over_mac,
4723 if (fail_over_mac_value == -1) {
4724 pr_err("Error: invalid fail_over_mac \"%s\"\n",
4725 arp_validate == NULL ? "NULL" : arp_validate);
4729 if (bond_mode != BOND_MODE_ACTIVEBACKUP)
4730 pr_warning("Warning: fail_over_mac only affects active-backup mode.\n");
4732 fail_over_mac_value = BOND_FOM_NONE;
4735 /* fill params struct with the proper values */
4736 params->mode = bond_mode;
4737 params->xmit_policy = xmit_hashtype;
4738 params->miimon = miimon;
4739 params->num_peer_notif = num_peer_notif;
4740 params->arp_interval = arp_interval;
4741 params->arp_validate = arp_validate_value;
4742 params->updelay = updelay;
4743 params->downdelay = downdelay;
4744 params->use_carrier = use_carrier;
4745 params->lacp_fast = lacp_fast;
4746 params->primary[0] = 0;
4747 params->primary_reselect = primary_reselect_value;
4748 params->fail_over_mac = fail_over_mac_value;
4749 params->tx_queues = tx_queues;
4750 params->all_slaves_active = all_slaves_active;
4751 params->resend_igmp = resend_igmp;
4752 params->min_links = min_links;
4755 strncpy(params->primary, primary, IFNAMSIZ);
4756 params->primary[IFNAMSIZ - 1] = 0;
4759 memcpy(params->arp_targets, arp_target, sizeof(arp_target));
4764 static struct lock_class_key bonding_netdev_xmit_lock_key;
4765 static struct lock_class_key bonding_netdev_addr_lock_key;
4767 static void bond_set_lockdep_class_one(struct net_device *dev,
4768 struct netdev_queue *txq,
4771 lockdep_set_class(&txq->_xmit_lock,
4772 &bonding_netdev_xmit_lock_key);
4775 static void bond_set_lockdep_class(struct net_device *dev)
4777 lockdep_set_class(&dev->addr_list_lock,
4778 &bonding_netdev_addr_lock_key);
4779 netdev_for_each_tx_queue(dev, bond_set_lockdep_class_one, NULL);
4783 * Called from registration process
4785 static int bond_init(struct net_device *bond_dev)
4787 struct bonding *bond = netdev_priv(bond_dev);
4788 struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id);
4789 struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
4791 pr_debug("Begin bond_init for %s\n", bond_dev->name);
4794 * Initialize locks that may be required during
4795 * en/deslave operations. All of the bond_open work
4796 * (of which this is part) should really be moved to
4797 * a phase prior to dev_open
4799 spin_lock_init(&(bond_info->tx_hashtbl_lock));
4800 spin_lock_init(&(bond_info->rx_hashtbl_lock));
4802 bond->wq = create_singlethread_workqueue(bond_dev->name);
4806 bond_set_lockdep_class(bond_dev);
4808 list_add_tail(&bond->bond_list, &bn->dev_list);
4810 bond_prepare_sysfs_group(bond);
4812 bond_debug_register(bond);
4814 __hw_addr_init(&bond->mc_list);
4818 static int bond_validate(struct nlattr *tb[], struct nlattr *data[])
4820 if (tb[IFLA_ADDRESS]) {
4821 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
4823 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
4824 return -EADDRNOTAVAIL;
4829 static int bond_get_tx_queues(struct net *net, struct nlattr *tb[],
4830 unsigned int *num_queues,
4831 unsigned int *real_num_queues)
4833 *num_queues = tx_queues;
4837 static struct rtnl_link_ops bond_link_ops __read_mostly = {
4839 .priv_size = sizeof(struct bonding),
4840 .setup = bond_setup,
4841 .validate = bond_validate,
4842 .get_tx_queues = bond_get_tx_queues,
4845 /* Create a new bond based on the specified name and bonding parameters.
4846 * If name is NULL, obtain a suitable "bond%d" name for us.
4847 * Caller must NOT hold rtnl_lock; we need to release it here before we
4848 * set up our sysfs entries.
4850 int bond_create(struct net *net, const char *name)
4852 struct net_device *bond_dev;
4857 bond_dev = alloc_netdev_mq(sizeof(struct bonding),
4858 name ? name : "bond%d",
4859 bond_setup, tx_queues);
4861 pr_err("%s: eek! can't alloc netdev!\n", name);
4866 dev_net_set(bond_dev, net);
4867 bond_dev->rtnl_link_ops = &bond_link_ops;
4869 res = register_netdevice(bond_dev);
4871 netif_carrier_off(bond_dev);
4875 bond_destructor(bond_dev);
4879 static int __net_init bond_net_init(struct net *net)
4881 struct bond_net *bn = net_generic(net, bond_net_id);
4884 INIT_LIST_HEAD(&bn->dev_list);
4886 bond_create_proc_dir(bn);
4887 bond_create_sysfs(bn);
4892 static void __net_exit bond_net_exit(struct net *net)
4894 struct bond_net *bn = net_generic(net, bond_net_id);
4896 bond_destroy_sysfs(bn);
4897 bond_destroy_proc_dir(bn);
4900 static struct pernet_operations bond_net_ops = {
4901 .init = bond_net_init,
4902 .exit = bond_net_exit,
4904 .size = sizeof(struct bond_net),
4907 static int __init bonding_init(void)
4912 pr_info("%s", bond_version);
4914 res = bond_check_params(&bonding_defaults);
4918 res = register_pernet_subsys(&bond_net_ops);
4922 res = rtnl_link_register(&bond_link_ops);
4926 bond_create_debugfs();
4928 for (i = 0; i < max_bonds; i++) {
4929 res = bond_create(&init_net, NULL);
4934 register_netdevice_notifier(&bond_netdev_notifier);
4935 register_inetaddr_notifier(&bond_inetaddr_notifier);
4939 rtnl_link_unregister(&bond_link_ops);
4941 unregister_pernet_subsys(&bond_net_ops);
4946 static void __exit bonding_exit(void)
4948 unregister_netdevice_notifier(&bond_netdev_notifier);
4949 unregister_inetaddr_notifier(&bond_inetaddr_notifier);
4951 bond_destroy_debugfs();
4953 rtnl_link_unregister(&bond_link_ops);
4954 unregister_pernet_subsys(&bond_net_ops);
4956 #ifdef CONFIG_NET_POLL_CONTROLLER
4958 * Make sure we don't have an imbalance on our netpoll blocking
4960 WARN_ON(atomic_read(&netpoll_block_tx));
4964 module_init(bonding_init);
4965 module_exit(bonding_exit);
4966 MODULE_LICENSE("GPL");
4967 MODULE_VERSION(DRV_VERSION);
4968 MODULE_DESCRIPTION(DRV_DESCRIPTION ", v" DRV_VERSION);
4969 MODULE_AUTHOR("Thomas Davis, tadavis@lbl.gov and many others");
4970 MODULE_ALIAS_RTNL_LINK("bond");