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 #include <linux/kernel.h>
35 #include <linux/module.h>
36 #include <linux/types.h>
37 #include <linux/fcntl.h>
38 #include <linux/interrupt.h>
39 #include <linux/ptrace.h>
40 #include <linux/ioport.h>
44 #include <linux/tcp.h>
45 #include <linux/udp.h>
46 #include <linux/slab.h>
47 #include <linux/string.h>
48 #include <linux/init.h>
49 #include <linux/timer.h>
50 #include <linux/socket.h>
51 #include <linux/ctype.h>
52 #include <linux/inet.h>
53 #include <linux/bitops.h>
56 #include <linux/uaccess.h>
57 #include <linux/errno.h>
58 #include <linux/netdevice.h>
59 #include <linux/inetdevice.h>
60 #include <linux/igmp.h>
61 #include <linux/etherdevice.h>
62 #include <linux/skbuff.h>
64 #include <linux/rtnetlink.h>
65 #include <linux/smp.h>
66 #include <linux/if_ether.h>
68 #include <linux/mii.h>
69 #include <linux/ethtool.h>
70 #include <linux/if_vlan.h>
71 #include <linux/if_bonding.h>
72 #include <linux/jiffies.h>
73 #include <linux/preempt.h>
74 #include <net/route.h>
75 #include <net/net_namespace.h>
76 #include <net/netns/generic.h>
77 #include <net/pkt_sched.h>
78 #include <linux/rculist.h>
79 #include <net/flow_dissector.h>
80 #include <net/switchdev.h>
81 #include <net/bonding.h>
82 #include <net/bond_3ad.h>
83 #include <net/bond_alb.h>
85 #include "bonding_priv.h"
87 /*---------------------------- Module parameters ----------------------------*/
89 /* monitor all links that often (in milliseconds). <=0 disables monitoring */
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;
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
;
106 static char *arp_ip_target
[BOND_MAX_ARP_TARGETS
];
107 static char *arp_validate
;
108 static char *arp_all_targets
;
109 static char *fail_over_mac
;
110 static int all_slaves_active
;
111 static struct bond_params bonding_defaults
;
112 static int resend_igmp
= BOND_DEFAULT_RESEND_IGMP
;
113 static int packets_per_slave
= 1;
114 static int lp_interval
= BOND_ALB_DEFAULT_LP_INTERVAL
;
116 module_param(max_bonds
, int, 0);
117 MODULE_PARM_DESC(max_bonds
, "Max number of bonded devices");
118 module_param(tx_queues
, int, 0);
119 MODULE_PARM_DESC(tx_queues
, "Max number of transmit queues (default = 16)");
120 module_param_named(num_grat_arp
, num_peer_notif
, int, 0644);
121 MODULE_PARM_DESC(num_grat_arp
, "Number of peer notifications to send on "
122 "failover event (alias of num_unsol_na)");
123 module_param_named(num_unsol_na
, num_peer_notif
, int, 0644);
124 MODULE_PARM_DESC(num_unsol_na
, "Number of peer notifications to send on "
125 "failover event (alias of num_grat_arp)");
126 module_param(miimon
, int, 0);
127 MODULE_PARM_DESC(miimon
, "Link check interval in milliseconds");
128 module_param(updelay
, int, 0);
129 MODULE_PARM_DESC(updelay
, "Delay before considering link up, in milliseconds");
130 module_param(downdelay
, int, 0);
131 MODULE_PARM_DESC(downdelay
, "Delay before considering link down, "
133 module_param(use_carrier
, int, 0);
134 MODULE_PARM_DESC(use_carrier
, "Use netif_carrier_ok (vs MII ioctls) in miimon; "
135 "0 for off, 1 for on (default)");
136 module_param(mode
, charp
, 0);
137 MODULE_PARM_DESC(mode
, "Mode of operation; 0 for balance-rr, "
138 "1 for active-backup, 2 for balance-xor, "
139 "3 for broadcast, 4 for 802.3ad, 5 for balance-tlb, "
140 "6 for balance-alb");
141 module_param(primary
, charp
, 0);
142 MODULE_PARM_DESC(primary
, "Primary network device to use");
143 module_param(primary_reselect
, charp
, 0);
144 MODULE_PARM_DESC(primary_reselect
, "Reselect primary slave "
146 "0 for always (default), "
147 "1 for only if speed of primary is "
149 "2 for only on active slave "
151 module_param(lacp_rate
, charp
, 0);
152 MODULE_PARM_DESC(lacp_rate
, "LACPDU tx rate to request from 802.3ad partner; "
153 "0 for slow, 1 for fast");
154 module_param(ad_select
, charp
, 0);
155 MODULE_PARM_DESC(ad_select
, "803.ad aggregation selection logic; "
156 "0 for stable (default), 1 for bandwidth, "
158 module_param(min_links
, int, 0);
159 MODULE_PARM_DESC(min_links
, "Minimum number of available links before turning on carrier");
161 module_param(xmit_hash_policy
, charp
, 0);
162 MODULE_PARM_DESC(xmit_hash_policy
, "balance-xor and 802.3ad hashing method; "
163 "0 for layer 2 (default), 1 for layer 3+4, "
164 "2 for layer 2+3, 3 for encap layer 2+3, "
165 "4 for encap layer 3+4");
166 module_param(arp_interval
, int, 0);
167 MODULE_PARM_DESC(arp_interval
, "arp interval in milliseconds");
168 module_param_array(arp_ip_target
, charp
, NULL
, 0);
169 MODULE_PARM_DESC(arp_ip_target
, "arp targets in n.n.n.n form");
170 module_param(arp_validate
, charp
, 0);
171 MODULE_PARM_DESC(arp_validate
, "validate src/dst of ARP probes; "
172 "0 for none (default), 1 for active, "
173 "2 for backup, 3 for all");
174 module_param(arp_all_targets
, charp
, 0);
175 MODULE_PARM_DESC(arp_all_targets
, "fail on any/all arp targets timeout; 0 for any (default), 1 for all");
176 module_param(fail_over_mac
, charp
, 0);
177 MODULE_PARM_DESC(fail_over_mac
, "For active-backup, do not set all slaves to "
178 "the same MAC; 0 for none (default), "
179 "1 for active, 2 for follow");
180 module_param(all_slaves_active
, int, 0);
181 MODULE_PARM_DESC(all_slaves_active
, "Keep all frames received on an interface "
182 "by setting active flag for all slaves; "
183 "0 for never (default), 1 for always.");
184 module_param(resend_igmp
, int, 0);
185 MODULE_PARM_DESC(resend_igmp
, "Number of IGMP membership reports to send on "
187 module_param(packets_per_slave
, int, 0);
188 MODULE_PARM_DESC(packets_per_slave
, "Packets to send per slave in balance-rr "
189 "mode; 0 for a random slave, 1 packet per "
190 "slave (default), >1 packets per slave.");
191 module_param(lp_interval
, uint
, 0);
192 MODULE_PARM_DESC(lp_interval
, "The number of seconds between instances where "
193 "the bonding driver sends learning packets to "
194 "each slaves peer switch. The default is 1.");
196 /*----------------------------- Global variables ----------------------------*/
198 #ifdef CONFIG_NET_POLL_CONTROLLER
199 atomic_t netpoll_block_tx
= ATOMIC_INIT(0);
202 int bond_net_id __read_mostly
;
204 static __be32 arp_target
[BOND_MAX_ARP_TARGETS
];
205 static int arp_ip_count
;
206 static int bond_mode
= BOND_MODE_ROUNDROBIN
;
207 static int xmit_hashtype
= BOND_XMIT_POLICY_LAYER2
;
208 static int lacp_fast
;
210 /*-------------------------- Forward declarations ---------------------------*/
212 static int bond_init(struct net_device
*bond_dev
);
213 static void bond_uninit(struct net_device
*bond_dev
);
214 static struct rtnl_link_stats64
*bond_get_stats(struct net_device
*bond_dev
,
215 struct rtnl_link_stats64
*stats
);
216 static void bond_slave_arr_handler(struct work_struct
*work
);
217 static bool bond_time_in_interval(struct bonding
*bond
, unsigned long last_act
,
220 /*---------------------------- General routines -----------------------------*/
222 const char *bond_mode_name(int mode
)
224 static const char *names
[] = {
225 [BOND_MODE_ROUNDROBIN
] = "load balancing (round-robin)",
226 [BOND_MODE_ACTIVEBACKUP
] = "fault-tolerance (active-backup)",
227 [BOND_MODE_XOR
] = "load balancing (xor)",
228 [BOND_MODE_BROADCAST
] = "fault-tolerance (broadcast)",
229 [BOND_MODE_8023AD
] = "IEEE 802.3ad Dynamic link aggregation",
230 [BOND_MODE_TLB
] = "transmit load balancing",
231 [BOND_MODE_ALB
] = "adaptive load balancing",
234 if (mode
< BOND_MODE_ROUNDROBIN
|| mode
> BOND_MODE_ALB
)
240 /*---------------------------------- VLAN -----------------------------------*/
243 * bond_dev_queue_xmit - Prepare skb for xmit.
245 * @bond: bond device that got this skb for tx.
246 * @skb: hw accel VLAN tagged skb to transmit
247 * @slave_dev: slave that is supposed to xmit this skbuff
249 void bond_dev_queue_xmit(struct bonding
*bond
, struct sk_buff
*skb
,
250 struct net_device
*slave_dev
)
252 skb
->dev
= slave_dev
;
254 BUILD_BUG_ON(sizeof(skb
->queue_mapping
) !=
255 sizeof(qdisc_skb_cb(skb
)->slave_dev_queue_mapping
));
256 skb
->queue_mapping
= qdisc_skb_cb(skb
)->slave_dev_queue_mapping
;
258 if (unlikely(netpoll_tx_running(bond
->dev
)))
259 bond_netpoll_send_skb(bond_get_slave_by_dev(bond
, slave_dev
), skb
);
264 /* In the following 2 functions, bond_vlan_rx_add_vid and bond_vlan_rx_kill_vid,
265 * We don't protect the slave list iteration with a lock because:
266 * a. This operation is performed in IOCTL context,
267 * b. The operation is protected by the RTNL semaphore in the 8021q code,
268 * c. Holding a lock with BH disabled while directly calling a base driver
269 * entry point is generally a BAD idea.
271 * The design of synchronization/protection for this operation in the 8021q
272 * module is good for one or more VLAN devices over a single physical device
273 * and cannot be extended for a teaming solution like bonding, so there is a
274 * potential race condition here where a net device from the vlan group might
275 * be referenced (either by a base driver or the 8021q code) while it is being
276 * removed from the system. However, it turns out we're not making matters
277 * worse, and if it works for regular VLAN usage it will work here too.
281 * bond_vlan_rx_add_vid - Propagates adding an id to slaves
282 * @bond_dev: bonding net device that got called
283 * @vid: vlan id being added
285 static int bond_vlan_rx_add_vid(struct net_device
*bond_dev
,
286 __be16 proto
, u16 vid
)
288 struct bonding
*bond
= netdev_priv(bond_dev
);
289 struct slave
*slave
, *rollback_slave
;
290 struct list_head
*iter
;
293 bond_for_each_slave(bond
, slave
, iter
) {
294 res
= vlan_vid_add(slave
->dev
, proto
, vid
);
302 /* unwind to the slave that failed */
303 bond_for_each_slave(bond
, rollback_slave
, iter
) {
304 if (rollback_slave
== slave
)
307 vlan_vid_del(rollback_slave
->dev
, proto
, vid
);
314 * bond_vlan_rx_kill_vid - Propagates deleting an id to slaves
315 * @bond_dev: bonding net device that got called
316 * @vid: vlan id being removed
318 static int bond_vlan_rx_kill_vid(struct net_device
*bond_dev
,
319 __be16 proto
, u16 vid
)
321 struct bonding
*bond
= netdev_priv(bond_dev
);
322 struct list_head
*iter
;
325 bond_for_each_slave(bond
, slave
, iter
)
326 vlan_vid_del(slave
->dev
, proto
, vid
);
328 if (bond_is_lb(bond
))
329 bond_alb_clear_vlan(bond
, vid
);
334 /*------------------------------- Link status -------------------------------*/
336 /* Set the carrier state for the master according to the state of its
337 * slaves. If any slaves are up, the master is up. In 802.3ad mode,
338 * do special 802.3ad magic.
340 * Returns zero if carrier state does not change, nonzero if it does.
342 int bond_set_carrier(struct bonding
*bond
)
344 struct list_head
*iter
;
347 if (!bond_has_slaves(bond
))
350 if (BOND_MODE(bond
) == BOND_MODE_8023AD
)
351 return bond_3ad_set_carrier(bond
);
353 bond_for_each_slave(bond
, slave
, iter
) {
354 if (slave
->link
== BOND_LINK_UP
) {
355 if (!netif_carrier_ok(bond
->dev
)) {
356 netif_carrier_on(bond
->dev
);
364 if (netif_carrier_ok(bond
->dev
)) {
365 netif_carrier_off(bond
->dev
);
371 /* Get link speed and duplex from the slave's base driver
372 * using ethtool. If for some reason the call fails or the
373 * values are invalid, set speed and duplex to -1,
376 static void bond_update_speed_duplex(struct slave
*slave
)
378 struct net_device
*slave_dev
= slave
->dev
;
379 struct ethtool_link_ksettings ecmd
;
382 slave
->speed
= SPEED_UNKNOWN
;
383 slave
->duplex
= DUPLEX_UNKNOWN
;
385 res
= __ethtool_get_link_ksettings(slave_dev
, &ecmd
);
389 if (ecmd
.base
.speed
== 0 || ecmd
.base
.speed
== ((__u32
)-1))
392 switch (ecmd
.base
.duplex
) {
400 slave
->speed
= ecmd
.base
.speed
;
401 slave
->duplex
= ecmd
.base
.duplex
;
406 const char *bond_slave_link_status(s8 link
)
422 /* if <dev> supports MII link status reporting, check its link status.
424 * We either do MII/ETHTOOL ioctls, or check netif_carrier_ok(),
425 * depending upon the setting of the use_carrier parameter.
427 * Return either BMSR_LSTATUS, meaning that the link is up (or we
428 * can't tell and just pretend it is), or 0, meaning that the link is
431 * If reporting is non-zero, instead of faking link up, return -1 if
432 * both ETHTOOL and MII ioctls fail (meaning the device does not
433 * support them). If use_carrier is set, return whatever it says.
434 * It'd be nice if there was a good way to tell if a driver supports
435 * netif_carrier, but there really isn't.
437 static int bond_check_dev_link(struct bonding
*bond
,
438 struct net_device
*slave_dev
, int reporting
)
440 const struct net_device_ops
*slave_ops
= slave_dev
->netdev_ops
;
441 int (*ioctl
)(struct net_device
*, struct ifreq
*, int);
443 struct mii_ioctl_data
*mii
;
445 if (!reporting
&& !netif_running(slave_dev
))
448 if (bond
->params
.use_carrier
)
449 return netif_carrier_ok(slave_dev
) ? BMSR_LSTATUS
: 0;
451 /* Try to get link status using Ethtool first. */
452 if (slave_dev
->ethtool_ops
->get_link
)
453 return slave_dev
->ethtool_ops
->get_link(slave_dev
) ?
456 /* Ethtool can't be used, fallback to MII ioctls. */
457 ioctl
= slave_ops
->ndo_do_ioctl
;
459 /* TODO: set pointer to correct ioctl on a per team member
460 * bases to make this more efficient. that is, once
461 * we determine the correct ioctl, we will always
462 * call it and not the others for that team
466 /* We cannot assume that SIOCGMIIPHY will also read a
467 * register; not all network drivers (e.g., e100)
471 /* Yes, the mii is overlaid on the ifreq.ifr_ifru */
472 strncpy(ifr
.ifr_name
, slave_dev
->name
, IFNAMSIZ
);
474 if (IOCTL(slave_dev
, &ifr
, SIOCGMIIPHY
) == 0) {
475 mii
->reg_num
= MII_BMSR
;
476 if (IOCTL(slave_dev
, &ifr
, SIOCGMIIREG
) == 0)
477 return mii
->val_out
& BMSR_LSTATUS
;
481 /* If reporting, report that either there's no dev->do_ioctl,
482 * or both SIOCGMIIREG and get_link failed (meaning that we
483 * cannot report link status). If not reporting, pretend
486 return reporting
? -1 : BMSR_LSTATUS
;
489 /*----------------------------- Multicast list ------------------------------*/
491 /* Push the promiscuity flag down to appropriate slaves */
492 static int bond_set_promiscuity(struct bonding
*bond
, int inc
)
494 struct list_head
*iter
;
497 if (bond_uses_primary(bond
)) {
498 struct slave
*curr_active
= rtnl_dereference(bond
->curr_active_slave
);
501 err
= dev_set_promiscuity(curr_active
->dev
, inc
);
505 bond_for_each_slave(bond
, slave
, iter
) {
506 err
= dev_set_promiscuity(slave
->dev
, inc
);
514 /* Push the allmulti flag down to all slaves */
515 static int bond_set_allmulti(struct bonding
*bond
, int inc
)
517 struct list_head
*iter
;
520 if (bond_uses_primary(bond
)) {
521 struct slave
*curr_active
= rtnl_dereference(bond
->curr_active_slave
);
524 err
= dev_set_allmulti(curr_active
->dev
, inc
);
528 bond_for_each_slave(bond
, slave
, iter
) {
529 err
= dev_set_allmulti(slave
->dev
, inc
);
537 /* Retrieve the list of registered multicast addresses for the bonding
538 * device and retransmit an IGMP JOIN request to the current active
541 static void bond_resend_igmp_join_requests_delayed(struct work_struct
*work
)
543 struct bonding
*bond
= container_of(work
, struct bonding
,
546 if (!rtnl_trylock()) {
547 queue_delayed_work(bond
->wq
, &bond
->mcast_work
, 1);
550 call_netdevice_notifiers(NETDEV_RESEND_IGMP
, bond
->dev
);
552 if (bond
->igmp_retrans
> 1) {
553 bond
->igmp_retrans
--;
554 queue_delayed_work(bond
->wq
, &bond
->mcast_work
, HZ
/5);
559 /* Flush bond's hardware addresses from slave */
560 static void bond_hw_addr_flush(struct net_device
*bond_dev
,
561 struct net_device
*slave_dev
)
563 struct bonding
*bond
= netdev_priv(bond_dev
);
565 dev_uc_unsync(slave_dev
, bond_dev
);
566 dev_mc_unsync(slave_dev
, bond_dev
);
568 if (BOND_MODE(bond
) == BOND_MODE_8023AD
) {
569 /* del lacpdu mc addr from mc list */
570 u8 lacpdu_multicast
[ETH_ALEN
] = MULTICAST_LACPDU_ADDR
;
572 dev_mc_del(slave_dev
, lacpdu_multicast
);
576 /*--------------------------- Active slave change ---------------------------*/
578 /* Update the hardware address list and promisc/allmulti for the new and
579 * old active slaves (if any). Modes that are not using primary keep all
580 * slaves up date at all times; only the modes that use primary need to call
581 * this function to swap these settings during a failover.
583 static void bond_hw_addr_swap(struct bonding
*bond
, struct slave
*new_active
,
584 struct slave
*old_active
)
587 if (bond
->dev
->flags
& IFF_PROMISC
)
588 dev_set_promiscuity(old_active
->dev
, -1);
590 if (bond
->dev
->flags
& IFF_ALLMULTI
)
591 dev_set_allmulti(old_active
->dev
, -1);
593 bond_hw_addr_flush(bond
->dev
, old_active
->dev
);
597 /* FIXME: Signal errors upstream. */
598 if (bond
->dev
->flags
& IFF_PROMISC
)
599 dev_set_promiscuity(new_active
->dev
, 1);
601 if (bond
->dev
->flags
& IFF_ALLMULTI
)
602 dev_set_allmulti(new_active
->dev
, 1);
604 netif_addr_lock_bh(bond
->dev
);
605 dev_uc_sync(new_active
->dev
, bond
->dev
);
606 dev_mc_sync(new_active
->dev
, bond
->dev
);
607 netif_addr_unlock_bh(bond
->dev
);
612 * bond_set_dev_addr - clone slave's address to bond
613 * @bond_dev: bond net device
614 * @slave_dev: slave net device
616 * Should be called with RTNL held.
618 static void bond_set_dev_addr(struct net_device
*bond_dev
,
619 struct net_device
*slave_dev
)
621 netdev_dbg(bond_dev
, "bond_dev=%p slave_dev=%p slave_dev->name=%s slave_dev->addr_len=%d\n",
622 bond_dev
, slave_dev
, slave_dev
->name
, slave_dev
->addr_len
);
623 memcpy(bond_dev
->dev_addr
, slave_dev
->dev_addr
, slave_dev
->addr_len
);
624 bond_dev
->addr_assign_type
= NET_ADDR_STOLEN
;
625 call_netdevice_notifiers(NETDEV_CHANGEADDR
, bond_dev
);
628 static struct slave
*bond_get_old_active(struct bonding
*bond
,
629 struct slave
*new_active
)
632 struct list_head
*iter
;
634 bond_for_each_slave(bond
, slave
, iter
) {
635 if (slave
== new_active
)
638 if (ether_addr_equal(bond
->dev
->dev_addr
, slave
->dev
->dev_addr
))
645 /* bond_do_fail_over_mac
647 * Perform special MAC address swapping for fail_over_mac settings
651 static void bond_do_fail_over_mac(struct bonding
*bond
,
652 struct slave
*new_active
,
653 struct slave
*old_active
)
655 u8 tmp_mac
[ETH_ALEN
];
656 struct sockaddr saddr
;
659 switch (bond
->params
.fail_over_mac
) {
660 case BOND_FOM_ACTIVE
:
662 bond_set_dev_addr(bond
->dev
, new_active
->dev
);
664 case BOND_FOM_FOLLOW
:
665 /* if new_active && old_active, swap them
666 * if just old_active, do nothing (going to no active slave)
667 * if just new_active, set new_active to bond's MAC
673 old_active
= bond_get_old_active(bond
, new_active
);
676 ether_addr_copy(tmp_mac
, new_active
->dev
->dev_addr
);
677 ether_addr_copy(saddr
.sa_data
,
678 old_active
->dev
->dev_addr
);
679 saddr
.sa_family
= new_active
->dev
->type
;
681 ether_addr_copy(saddr
.sa_data
, bond
->dev
->dev_addr
);
682 saddr
.sa_family
= bond
->dev
->type
;
685 rv
= dev_set_mac_address(new_active
->dev
, &saddr
);
687 netdev_err(bond
->dev
, "Error %d setting MAC of slave %s\n",
688 -rv
, new_active
->dev
->name
);
695 ether_addr_copy(saddr
.sa_data
, tmp_mac
);
696 saddr
.sa_family
= old_active
->dev
->type
;
698 rv
= dev_set_mac_address(old_active
->dev
, &saddr
);
700 netdev_err(bond
->dev
, "Error %d setting MAC of slave %s\n",
701 -rv
, new_active
->dev
->name
);
705 netdev_err(bond
->dev
, "bond_do_fail_over_mac impossible: bad policy %d\n",
706 bond
->params
.fail_over_mac
);
712 static struct slave
*bond_choose_primary_or_current(struct bonding
*bond
)
714 struct slave
*prim
= rtnl_dereference(bond
->primary_slave
);
715 struct slave
*curr
= rtnl_dereference(bond
->curr_active_slave
);
717 if (!prim
|| prim
->link
!= BOND_LINK_UP
) {
718 if (!curr
|| curr
->link
!= BOND_LINK_UP
)
723 if (bond
->force_primary
) {
724 bond
->force_primary
= false;
728 if (!curr
|| curr
->link
!= BOND_LINK_UP
)
731 /* At this point, prim and curr are both up */
732 switch (bond
->params
.primary_reselect
) {
733 case BOND_PRI_RESELECT_ALWAYS
:
735 case BOND_PRI_RESELECT_BETTER
:
736 if (prim
->speed
< curr
->speed
)
738 if (prim
->speed
== curr
->speed
&& prim
->duplex
<= curr
->duplex
)
741 case BOND_PRI_RESELECT_FAILURE
:
744 netdev_err(bond
->dev
, "impossible primary_reselect %d\n",
745 bond
->params
.primary_reselect
);
751 * bond_find_best_slave - select the best available slave to be the active one
752 * @bond: our bonding struct
754 static struct slave
*bond_find_best_slave(struct bonding
*bond
)
756 struct slave
*slave
, *bestslave
= NULL
;
757 struct list_head
*iter
;
758 int mintime
= bond
->params
.updelay
;
760 slave
= bond_choose_primary_or_current(bond
);
764 bond_for_each_slave(bond
, slave
, iter
) {
765 if (slave
->link
== BOND_LINK_UP
)
767 if (slave
->link
== BOND_LINK_BACK
&& bond_slave_is_up(slave
) &&
768 slave
->delay
< mintime
) {
769 mintime
= slave
->delay
;
777 static bool bond_should_notify_peers(struct bonding
*bond
)
782 slave
= rcu_dereference(bond
->curr_active_slave
);
785 netdev_dbg(bond
->dev
, "bond_should_notify_peers: slave %s\n",
786 slave
? slave
->dev
->name
: "NULL");
788 if (!slave
|| !bond
->send_peer_notif
||
789 !netif_carrier_ok(bond
->dev
) ||
790 test_bit(__LINK_STATE_LINKWATCH_PENDING
, &slave
->dev
->state
))
797 * change_active_interface - change the active slave into the specified one
798 * @bond: our bonding struct
799 * @new: the new slave to make the active one
801 * Set the new slave to the bond's settings and unset them on the old
803 * Setting include flags, mc-list, promiscuity, allmulti, etc.
805 * If @new's link state is %BOND_LINK_BACK we'll set it to %BOND_LINK_UP,
806 * because it is apparently the best available slave we have, even though its
807 * updelay hasn't timed out yet.
809 * Caller must hold RTNL.
811 void bond_change_active_slave(struct bonding
*bond
, struct slave
*new_active
)
813 struct slave
*old_active
;
817 old_active
= rtnl_dereference(bond
->curr_active_slave
);
819 if (old_active
== new_active
)
823 new_active
->last_link_up
= jiffies
;
825 if (new_active
->link
== BOND_LINK_BACK
) {
826 if (bond_uses_primary(bond
)) {
827 netdev_info(bond
->dev
, "making interface %s the new active one %d ms earlier\n",
828 new_active
->dev
->name
,
829 (bond
->params
.updelay
- new_active
->delay
) * bond
->params
.miimon
);
832 new_active
->delay
= 0;
833 bond_set_slave_link_state(new_active
, BOND_LINK_UP
,
834 BOND_SLAVE_NOTIFY_NOW
);
836 if (BOND_MODE(bond
) == BOND_MODE_8023AD
)
837 bond_3ad_handle_link_change(new_active
, BOND_LINK_UP
);
839 if (bond_is_lb(bond
))
840 bond_alb_handle_link_change(bond
, new_active
, BOND_LINK_UP
);
842 if (bond_uses_primary(bond
)) {
843 netdev_info(bond
->dev
, "making interface %s the new active one\n",
844 new_active
->dev
->name
);
849 if (bond_uses_primary(bond
))
850 bond_hw_addr_swap(bond
, new_active
, old_active
);
852 if (bond_is_lb(bond
)) {
853 bond_alb_handle_active_change(bond
, new_active
);
855 bond_set_slave_inactive_flags(old_active
,
856 BOND_SLAVE_NOTIFY_NOW
);
858 bond_set_slave_active_flags(new_active
,
859 BOND_SLAVE_NOTIFY_NOW
);
861 rcu_assign_pointer(bond
->curr_active_slave
, new_active
);
864 if (BOND_MODE(bond
) == BOND_MODE_ACTIVEBACKUP
) {
866 bond_set_slave_inactive_flags(old_active
,
867 BOND_SLAVE_NOTIFY_NOW
);
870 bool should_notify_peers
= false;
872 bond_set_slave_active_flags(new_active
,
873 BOND_SLAVE_NOTIFY_NOW
);
875 if (bond
->params
.fail_over_mac
)
876 bond_do_fail_over_mac(bond
, new_active
,
879 if (netif_running(bond
->dev
)) {
880 bond
->send_peer_notif
=
881 bond
->params
.num_peer_notif
;
882 should_notify_peers
=
883 bond_should_notify_peers(bond
);
886 call_netdevice_notifiers(NETDEV_BONDING_FAILOVER
, bond
->dev
);
887 if (should_notify_peers
)
888 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS
,
893 /* resend IGMP joins since active slave has changed or
894 * all were sent on curr_active_slave.
895 * resend only if bond is brought up with the affected
896 * bonding modes and the retransmission is enabled
898 if (netif_running(bond
->dev
) && (bond
->params
.resend_igmp
> 0) &&
899 ((bond_uses_primary(bond
) && new_active
) ||
900 BOND_MODE(bond
) == BOND_MODE_ROUNDROBIN
)) {
901 bond
->igmp_retrans
= bond
->params
.resend_igmp
;
902 queue_delayed_work(bond
->wq
, &bond
->mcast_work
, 1);
907 * bond_select_active_slave - select a new active slave, if needed
908 * @bond: our bonding struct
910 * This functions should be called when one of the following occurs:
911 * - The old curr_active_slave has been released or lost its link.
912 * - The primary_slave has got its link back.
913 * - A slave has got its link back and there's no old curr_active_slave.
915 * Caller must hold RTNL.
917 void bond_select_active_slave(struct bonding
*bond
)
919 struct slave
*best_slave
;
924 best_slave
= bond_find_best_slave(bond
);
925 if (best_slave
!= rtnl_dereference(bond
->curr_active_slave
)) {
926 bond_change_active_slave(bond
, best_slave
);
927 rv
= bond_set_carrier(bond
);
931 if (netif_carrier_ok(bond
->dev
))
932 netdev_info(bond
->dev
, "first active interface up!\n");
934 netdev_info(bond
->dev
, "now running without any active interface!\n");
938 #ifdef CONFIG_NET_POLL_CONTROLLER
939 static inline int slave_enable_netpoll(struct slave
*slave
)
944 np
= kzalloc(sizeof(*np
), GFP_KERNEL
);
949 err
= __netpoll_setup(np
, slave
->dev
);
958 static inline void slave_disable_netpoll(struct slave
*slave
)
960 struct netpoll
*np
= slave
->np
;
966 __netpoll_free_async(np
);
969 static void bond_poll_controller(struct net_device
*bond_dev
)
971 struct bonding
*bond
= netdev_priv(bond_dev
);
972 struct slave
*slave
= NULL
;
973 struct list_head
*iter
;
974 struct ad_info ad_info
;
975 struct netpoll_info
*ni
;
976 const struct net_device_ops
*ops
;
978 if (BOND_MODE(bond
) == BOND_MODE_8023AD
)
979 if (bond_3ad_get_active_agg_info(bond
, &ad_info
))
982 bond_for_each_slave_rcu(bond
, slave
, iter
) {
983 ops
= slave
->dev
->netdev_ops
;
984 if (!bond_slave_is_up(slave
) || !ops
->ndo_poll_controller
)
987 if (BOND_MODE(bond
) == BOND_MODE_8023AD
) {
988 struct aggregator
*agg
=
989 SLAVE_AD_INFO(slave
)->port
.aggregator
;
992 agg
->aggregator_identifier
!= ad_info
.aggregator_id
)
996 ni
= rcu_dereference_bh(slave
->dev
->npinfo
);
997 if (down_trylock(&ni
->dev_lock
))
999 ops
->ndo_poll_controller(slave
->dev
);
1004 static void bond_netpoll_cleanup(struct net_device
*bond_dev
)
1006 struct bonding
*bond
= netdev_priv(bond_dev
);
1007 struct list_head
*iter
;
1008 struct slave
*slave
;
1010 bond_for_each_slave(bond
, slave
, iter
)
1011 if (bond_slave_is_up(slave
))
1012 slave_disable_netpoll(slave
);
1015 static int bond_netpoll_setup(struct net_device
*dev
, struct netpoll_info
*ni
)
1017 struct bonding
*bond
= netdev_priv(dev
);
1018 struct list_head
*iter
;
1019 struct slave
*slave
;
1022 bond_for_each_slave(bond
, slave
, iter
) {
1023 err
= slave_enable_netpoll(slave
);
1025 bond_netpoll_cleanup(dev
);
1032 static inline int slave_enable_netpoll(struct slave
*slave
)
1036 static inline void slave_disable_netpoll(struct slave
*slave
)
1039 static void bond_netpoll_cleanup(struct net_device
*bond_dev
)
1044 /*---------------------------------- IOCTL ----------------------------------*/
1046 static netdev_features_t
bond_fix_features(struct net_device
*dev
,
1047 netdev_features_t features
)
1049 struct bonding
*bond
= netdev_priv(dev
);
1050 struct list_head
*iter
;
1051 netdev_features_t mask
;
1052 struct slave
*slave
;
1056 features
&= ~NETIF_F_ONE_FOR_ALL
;
1057 features
|= NETIF_F_ALL_FOR_ALL
;
1059 bond_for_each_slave(bond
, slave
, iter
) {
1060 features
= netdev_increment_features(features
,
1061 slave
->dev
->features
,
1064 features
= netdev_add_tso_features(features
, mask
);
1069 #define BOND_VLAN_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \
1070 NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
1071 NETIF_F_HIGHDMA | NETIF_F_LRO)
1073 #define BOND_ENC_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \
1074 NETIF_F_RXCSUM | NETIF_F_ALL_TSO)
1076 static void bond_compute_features(struct bonding
*bond
)
1078 unsigned int dst_release_flag
= IFF_XMIT_DST_RELEASE
|
1079 IFF_XMIT_DST_RELEASE_PERM
;
1080 netdev_features_t vlan_features
= BOND_VLAN_FEATURES
;
1081 netdev_features_t enc_features
= BOND_ENC_FEATURES
;
1082 struct net_device
*bond_dev
= bond
->dev
;
1083 struct list_head
*iter
;
1084 struct slave
*slave
;
1085 unsigned short max_hard_header_len
= ETH_HLEN
;
1086 unsigned int gso_max_size
= GSO_MAX_SIZE
;
1087 u16 gso_max_segs
= GSO_MAX_SEGS
;
1089 if (!bond_has_slaves(bond
))
1091 vlan_features
&= NETIF_F_ALL_FOR_ALL
;
1093 bond_for_each_slave(bond
, slave
, iter
) {
1094 vlan_features
= netdev_increment_features(vlan_features
,
1095 slave
->dev
->vlan_features
, BOND_VLAN_FEATURES
);
1097 enc_features
= netdev_increment_features(enc_features
,
1098 slave
->dev
->hw_enc_features
,
1100 dst_release_flag
&= slave
->dev
->priv_flags
;
1101 if (slave
->dev
->hard_header_len
> max_hard_header_len
)
1102 max_hard_header_len
= slave
->dev
->hard_header_len
;
1104 gso_max_size
= min(gso_max_size
, slave
->dev
->gso_max_size
);
1105 gso_max_segs
= min(gso_max_segs
, slave
->dev
->gso_max_segs
);
1109 bond_dev
->vlan_features
= vlan_features
;
1110 bond_dev
->hw_enc_features
= enc_features
| NETIF_F_GSO_ENCAP_ALL
;
1111 bond_dev
->hard_header_len
= max_hard_header_len
;
1112 bond_dev
->gso_max_segs
= gso_max_segs
;
1113 netif_set_gso_max_size(bond_dev
, gso_max_size
);
1115 bond_dev
->priv_flags
&= ~IFF_XMIT_DST_RELEASE
;
1116 if ((bond_dev
->priv_flags
& IFF_XMIT_DST_RELEASE_PERM
) &&
1117 dst_release_flag
== (IFF_XMIT_DST_RELEASE
| IFF_XMIT_DST_RELEASE_PERM
))
1118 bond_dev
->priv_flags
|= IFF_XMIT_DST_RELEASE
;
1120 netdev_change_features(bond_dev
);
1123 static void bond_setup_by_slave(struct net_device
*bond_dev
,
1124 struct net_device
*slave_dev
)
1126 bond_dev
->header_ops
= slave_dev
->header_ops
;
1128 bond_dev
->type
= slave_dev
->type
;
1129 bond_dev
->hard_header_len
= slave_dev
->hard_header_len
;
1130 bond_dev
->addr_len
= slave_dev
->addr_len
;
1132 memcpy(bond_dev
->broadcast
, slave_dev
->broadcast
,
1133 slave_dev
->addr_len
);
1136 /* On bonding slaves other than the currently active slave, suppress
1137 * duplicates except for alb non-mcast/bcast.
1139 static bool bond_should_deliver_exact_match(struct sk_buff
*skb
,
1140 struct slave
*slave
,
1141 struct bonding
*bond
)
1143 if (bond_is_slave_inactive(slave
)) {
1144 if (BOND_MODE(bond
) == BOND_MODE_ALB
&&
1145 skb
->pkt_type
!= PACKET_BROADCAST
&&
1146 skb
->pkt_type
!= PACKET_MULTICAST
)
1153 static rx_handler_result_t
bond_handle_frame(struct sk_buff
**pskb
)
1155 struct sk_buff
*skb
= *pskb
;
1156 struct slave
*slave
;
1157 struct bonding
*bond
;
1158 int (*recv_probe
)(const struct sk_buff
*, struct bonding
*,
1160 int ret
= RX_HANDLER_ANOTHER
;
1162 skb
= skb_share_check(skb
, GFP_ATOMIC
);
1164 return RX_HANDLER_CONSUMED
;
1168 slave
= bond_slave_get_rcu(skb
->dev
);
1171 recv_probe
= ACCESS_ONCE(bond
->recv_probe
);
1173 ret
= recv_probe(skb
, bond
, slave
);
1174 if (ret
== RX_HANDLER_CONSUMED
) {
1180 if (bond_should_deliver_exact_match(skb
, slave
, bond
))
1181 return RX_HANDLER_EXACT
;
1183 skb
->dev
= bond
->dev
;
1185 if (BOND_MODE(bond
) == BOND_MODE_ALB
&&
1186 bond
->dev
->priv_flags
& IFF_BRIDGE_PORT
&&
1187 skb
->pkt_type
== PACKET_HOST
) {
1189 if (unlikely(skb_cow_head(skb
,
1190 skb
->data
- skb_mac_header(skb
)))) {
1192 return RX_HANDLER_CONSUMED
;
1194 ether_addr_copy(eth_hdr(skb
)->h_dest
, bond
->dev
->dev_addr
);
1200 static enum netdev_lag_tx_type
bond_lag_tx_type(struct bonding
*bond
)
1202 switch (BOND_MODE(bond
)) {
1203 case BOND_MODE_ROUNDROBIN
:
1204 return NETDEV_LAG_TX_TYPE_ROUNDROBIN
;
1205 case BOND_MODE_ACTIVEBACKUP
:
1206 return NETDEV_LAG_TX_TYPE_ACTIVEBACKUP
;
1207 case BOND_MODE_BROADCAST
:
1208 return NETDEV_LAG_TX_TYPE_BROADCAST
;
1210 case BOND_MODE_8023AD
:
1211 return NETDEV_LAG_TX_TYPE_HASH
;
1213 return NETDEV_LAG_TX_TYPE_UNKNOWN
;
1217 static int bond_master_upper_dev_link(struct bonding
*bond
, struct slave
*slave
)
1219 struct netdev_lag_upper_info lag_upper_info
;
1222 lag_upper_info
.tx_type
= bond_lag_tx_type(bond
);
1223 err
= netdev_master_upper_dev_link(slave
->dev
, bond
->dev
, slave
,
1227 rtmsg_ifinfo(RTM_NEWLINK
, slave
->dev
, IFF_SLAVE
, GFP_KERNEL
);
1231 static void bond_upper_dev_unlink(struct bonding
*bond
, struct slave
*slave
)
1233 netdev_upper_dev_unlink(slave
->dev
, bond
->dev
);
1234 slave
->dev
->flags
&= ~IFF_SLAVE
;
1235 rtmsg_ifinfo(RTM_NEWLINK
, slave
->dev
, IFF_SLAVE
, GFP_KERNEL
);
1238 static struct slave
*bond_alloc_slave(struct bonding
*bond
)
1240 struct slave
*slave
= NULL
;
1242 slave
= kzalloc(sizeof(*slave
), GFP_KERNEL
);
1246 if (BOND_MODE(bond
) == BOND_MODE_8023AD
) {
1247 SLAVE_AD_INFO(slave
) = kzalloc(sizeof(struct ad_slave_info
),
1249 if (!SLAVE_AD_INFO(slave
)) {
1257 static void bond_free_slave(struct slave
*slave
)
1259 struct bonding
*bond
= bond_get_bond_by_slave(slave
);
1261 if (BOND_MODE(bond
) == BOND_MODE_8023AD
)
1262 kfree(SLAVE_AD_INFO(slave
));
1267 static void bond_fill_ifbond(struct bonding
*bond
, struct ifbond
*info
)
1269 info
->bond_mode
= BOND_MODE(bond
);
1270 info
->miimon
= bond
->params
.miimon
;
1271 info
->num_slaves
= bond
->slave_cnt
;
1274 static void bond_fill_ifslave(struct slave
*slave
, struct ifslave
*info
)
1276 strcpy(info
->slave_name
, slave
->dev
->name
);
1277 info
->link
= slave
->link
;
1278 info
->state
= bond_slave_state(slave
);
1279 info
->link_failure_count
= slave
->link_failure_count
;
1282 static void bond_netdev_notify(struct net_device
*dev
,
1283 struct netdev_bonding_info
*info
)
1286 netdev_bonding_info_change(dev
, info
);
1290 static void bond_netdev_notify_work(struct work_struct
*_work
)
1292 struct netdev_notify_work
*w
=
1293 container_of(_work
, struct netdev_notify_work
, work
.work
);
1295 bond_netdev_notify(w
->dev
, &w
->bonding_info
);
1300 void bond_queue_slave_event(struct slave
*slave
)
1302 struct bonding
*bond
= slave
->bond
;
1303 struct netdev_notify_work
*nnw
= kzalloc(sizeof(*nnw
), GFP_ATOMIC
);
1308 dev_hold(slave
->dev
);
1309 nnw
->dev
= slave
->dev
;
1310 bond_fill_ifslave(slave
, &nnw
->bonding_info
.slave
);
1311 bond_fill_ifbond(bond
, &nnw
->bonding_info
.master
);
1312 INIT_DELAYED_WORK(&nnw
->work
, bond_netdev_notify_work
);
1314 queue_delayed_work(slave
->bond
->wq
, &nnw
->work
, 0);
1317 void bond_lower_state_changed(struct slave
*slave
)
1319 struct netdev_lag_lower_state_info info
;
1321 info
.link_up
= slave
->link
== BOND_LINK_UP
||
1322 slave
->link
== BOND_LINK_FAIL
;
1323 info
.tx_enabled
= bond_is_active_slave(slave
);
1324 netdev_lower_state_changed(slave
->dev
, &info
);
1327 /* enslave device <slave> to bond device <master> */
1328 int bond_enslave(struct net_device
*bond_dev
, struct net_device
*slave_dev
)
1330 struct bonding
*bond
= netdev_priv(bond_dev
);
1331 const struct net_device_ops
*slave_ops
= slave_dev
->netdev_ops
;
1332 struct slave
*new_slave
= NULL
, *prev_slave
;
1333 struct sockaddr addr
;
1337 if (!bond
->params
.use_carrier
&&
1338 slave_dev
->ethtool_ops
->get_link
== NULL
&&
1339 slave_ops
->ndo_do_ioctl
== NULL
) {
1340 netdev_warn(bond_dev
, "no link monitoring support for %s\n",
1344 /* already enslaved */
1345 if (slave_dev
->flags
& IFF_SLAVE
) {
1346 netdev_dbg(bond_dev
, "Error: Device was already enslaved\n");
1350 if (bond_dev
== slave_dev
) {
1351 netdev_err(bond_dev
, "cannot enslave bond to itself.\n");
1355 /* vlan challenged mutual exclusion */
1356 /* no need to lock since we're protected by rtnl_lock */
1357 if (slave_dev
->features
& NETIF_F_VLAN_CHALLENGED
) {
1358 netdev_dbg(bond_dev
, "%s is NETIF_F_VLAN_CHALLENGED\n",
1360 if (vlan_uses_dev(bond_dev
)) {
1361 netdev_err(bond_dev
, "Error: cannot enslave VLAN challenged slave %s on VLAN enabled bond %s\n",
1362 slave_dev
->name
, bond_dev
->name
);
1365 netdev_warn(bond_dev
, "enslaved VLAN challenged slave %s. Adding VLANs will be blocked as long as %s is part of bond %s\n",
1366 slave_dev
->name
, slave_dev
->name
,
1370 netdev_dbg(bond_dev
, "%s is !NETIF_F_VLAN_CHALLENGED\n",
1374 /* Old ifenslave binaries are no longer supported. These can
1375 * be identified with moderate accuracy by the state of the slave:
1376 * the current ifenslave will set the interface down prior to
1377 * enslaving it; the old ifenslave will not.
1379 if (slave_dev
->flags
& IFF_UP
) {
1380 netdev_err(bond_dev
, "%s is up - this may be due to an out of date ifenslave\n",
1385 /* set bonding device ether type by slave - bonding netdevices are
1386 * created with ether_setup, so when the slave type is not ARPHRD_ETHER
1387 * there is a need to override some of the type dependent attribs/funcs.
1389 * bond ether type mutual exclusion - don't allow slaves of dissimilar
1390 * ether type (eg ARPHRD_ETHER and ARPHRD_INFINIBAND) share the same bond
1392 if (!bond_has_slaves(bond
)) {
1393 if (bond_dev
->type
!= slave_dev
->type
) {
1394 netdev_dbg(bond_dev
, "change device type from %d to %d\n",
1395 bond_dev
->type
, slave_dev
->type
);
1397 res
= call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE
,
1399 res
= notifier_to_errno(res
);
1401 netdev_err(bond_dev
, "refused to change device type\n");
1405 /* Flush unicast and multicast addresses */
1406 dev_uc_flush(bond_dev
);
1407 dev_mc_flush(bond_dev
);
1409 if (slave_dev
->type
!= ARPHRD_ETHER
)
1410 bond_setup_by_slave(bond_dev
, slave_dev
);
1412 ether_setup(bond_dev
);
1413 bond_dev
->priv_flags
&= ~IFF_TX_SKB_SHARING
;
1416 call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE
,
1419 } else if (bond_dev
->type
!= slave_dev
->type
) {
1420 netdev_err(bond_dev
, "%s ether type (%d) is different from other slaves (%d), can not enslave it\n",
1421 slave_dev
->name
, slave_dev
->type
, bond_dev
->type
);
1425 if (slave_dev
->type
== ARPHRD_INFINIBAND
&&
1426 BOND_MODE(bond
) != BOND_MODE_ACTIVEBACKUP
) {
1427 netdev_warn(bond_dev
, "Type (%d) supports only active-backup mode\n",
1430 goto err_undo_flags
;
1433 if (!slave_ops
->ndo_set_mac_address
||
1434 slave_dev
->type
== ARPHRD_INFINIBAND
) {
1435 netdev_warn(bond_dev
, "The slave device specified does not support setting the MAC address\n");
1436 if (BOND_MODE(bond
) == BOND_MODE_ACTIVEBACKUP
&&
1437 bond
->params
.fail_over_mac
!= BOND_FOM_ACTIVE
) {
1438 if (!bond_has_slaves(bond
)) {
1439 bond
->params
.fail_over_mac
= BOND_FOM_ACTIVE
;
1440 netdev_warn(bond_dev
, "Setting fail_over_mac to active for active-backup mode\n");
1442 netdev_err(bond_dev
, "The slave device specified does not support setting the MAC address, but fail_over_mac is not set to active\n");
1444 goto err_undo_flags
;
1449 call_netdevice_notifiers(NETDEV_JOIN
, slave_dev
);
1451 /* If this is the first slave, then we need to set the master's hardware
1452 * address to be the same as the slave's.
1454 if (!bond_has_slaves(bond
) &&
1455 bond
->dev
->addr_assign_type
== NET_ADDR_RANDOM
)
1456 bond_set_dev_addr(bond
->dev
, slave_dev
);
1458 new_slave
= bond_alloc_slave(bond
);
1461 goto err_undo_flags
;
1464 new_slave
->bond
= bond
;
1465 new_slave
->dev
= slave_dev
;
1466 /* Set the new_slave's queue_id to be zero. Queue ID mapping
1467 * is set via sysfs or module option if desired.
1469 new_slave
->queue_id
= 0;
1471 /* Save slave's original mtu and then set it to match the bond */
1472 new_slave
->original_mtu
= slave_dev
->mtu
;
1473 res
= dev_set_mtu(slave_dev
, bond
->dev
->mtu
);
1475 netdev_dbg(bond_dev
, "Error %d calling dev_set_mtu\n", res
);
1479 /* Save slave's original ("permanent") mac address for modes
1480 * that need it, and for restoring it upon release, and then
1481 * set it to the master's address
1483 ether_addr_copy(new_slave
->perm_hwaddr
, slave_dev
->dev_addr
);
1485 if (!bond
->params
.fail_over_mac
||
1486 BOND_MODE(bond
) != BOND_MODE_ACTIVEBACKUP
) {
1487 /* Set slave to master's mac address. The application already
1488 * set the master's mac address to that of the first slave
1490 memcpy(addr
.sa_data
, bond_dev
->dev_addr
, bond_dev
->addr_len
);
1491 addr
.sa_family
= slave_dev
->type
;
1492 res
= dev_set_mac_address(slave_dev
, &addr
);
1494 netdev_dbg(bond_dev
, "Error %d calling set_mac_address\n", res
);
1495 goto err_restore_mtu
;
1499 /* set slave flag before open to prevent IPv6 addrconf */
1500 slave_dev
->flags
|= IFF_SLAVE
;
1502 /* open the slave since the application closed it */
1503 res
= dev_open(slave_dev
);
1505 netdev_dbg(bond_dev
, "Opening slave %s failed\n", slave_dev
->name
);
1506 goto err_restore_mac
;
1509 slave_dev
->priv_flags
|= IFF_BONDING
;
1510 /* initialize slave stats */
1511 dev_get_stats(new_slave
->dev
, &new_slave
->slave_stats
);
1513 if (bond_is_lb(bond
)) {
1514 /* bond_alb_init_slave() must be called before all other stages since
1515 * it might fail and we do not want to have to undo everything
1517 res
= bond_alb_init_slave(bond
, new_slave
);
1522 /* If the mode uses primary, then the following is handled by
1523 * bond_change_active_slave().
1525 if (!bond_uses_primary(bond
)) {
1526 /* set promiscuity level to new slave */
1527 if (bond_dev
->flags
& IFF_PROMISC
) {
1528 res
= dev_set_promiscuity(slave_dev
, 1);
1533 /* set allmulti level to new slave */
1534 if (bond_dev
->flags
& IFF_ALLMULTI
) {
1535 res
= dev_set_allmulti(slave_dev
, 1);
1540 netif_addr_lock_bh(bond_dev
);
1542 dev_mc_sync_multiple(slave_dev
, bond_dev
);
1543 dev_uc_sync_multiple(slave_dev
, bond_dev
);
1545 netif_addr_unlock_bh(bond_dev
);
1548 if (BOND_MODE(bond
) == BOND_MODE_8023AD
) {
1549 /* add lacpdu mc addr to mc list */
1550 u8 lacpdu_multicast
[ETH_ALEN
] = MULTICAST_LACPDU_ADDR
;
1552 dev_mc_add(slave_dev
, lacpdu_multicast
);
1555 res
= vlan_vids_add_by_dev(slave_dev
, bond_dev
);
1557 netdev_err(bond_dev
, "Couldn't add bond vlan ids to %s\n",
1562 prev_slave
= bond_last_slave(bond
);
1564 new_slave
->delay
= 0;
1565 new_slave
->link_failure_count
= 0;
1567 bond_update_speed_duplex(new_slave
);
1569 new_slave
->last_rx
= jiffies
-
1570 (msecs_to_jiffies(bond
->params
.arp_interval
) + 1);
1571 for (i
= 0; i
< BOND_MAX_ARP_TARGETS
; i
++)
1572 new_slave
->target_last_arp_rx
[i
] = new_slave
->last_rx
;
1574 if (bond
->params
.miimon
&& !bond
->params
.use_carrier
) {
1575 link_reporting
= bond_check_dev_link(bond
, slave_dev
, 1);
1577 if ((link_reporting
== -1) && !bond
->params
.arp_interval
) {
1578 /* miimon is set but a bonded network driver
1579 * does not support ETHTOOL/MII and
1580 * arp_interval is not set. Note: if
1581 * use_carrier is enabled, we will never go
1582 * here (because netif_carrier is always
1583 * supported); thus, we don't need to change
1584 * the messages for netif_carrier.
1586 netdev_warn(bond_dev
, "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",
1588 } else if (link_reporting
== -1) {
1589 /* unable get link status using mii/ethtool */
1590 netdev_warn(bond_dev
, "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",
1595 /* check for initial state */
1596 new_slave
->link
= BOND_LINK_NOCHANGE
;
1597 if (bond
->params
.miimon
) {
1598 if (bond_check_dev_link(bond
, slave_dev
, 0) == BMSR_LSTATUS
) {
1599 if (bond
->params
.updelay
) {
1600 bond_set_slave_link_state(new_slave
,
1602 BOND_SLAVE_NOTIFY_NOW
);
1603 new_slave
->delay
= bond
->params
.updelay
;
1605 bond_set_slave_link_state(new_slave
,
1607 BOND_SLAVE_NOTIFY_NOW
);
1610 bond_set_slave_link_state(new_slave
, BOND_LINK_DOWN
,
1611 BOND_SLAVE_NOTIFY_NOW
);
1613 } else if (bond
->params
.arp_interval
) {
1614 bond_set_slave_link_state(new_slave
,
1615 (netif_carrier_ok(slave_dev
) ?
1616 BOND_LINK_UP
: BOND_LINK_DOWN
),
1617 BOND_SLAVE_NOTIFY_NOW
);
1619 bond_set_slave_link_state(new_slave
, BOND_LINK_UP
,
1620 BOND_SLAVE_NOTIFY_NOW
);
1623 if (new_slave
->link
!= BOND_LINK_DOWN
)
1624 new_slave
->last_link_up
= jiffies
;
1625 netdev_dbg(bond_dev
, "Initial state of slave_dev is BOND_LINK_%s\n",
1626 new_slave
->link
== BOND_LINK_DOWN
? "DOWN" :
1627 (new_slave
->link
== BOND_LINK_UP
? "UP" : "BACK"));
1629 if (bond_uses_primary(bond
) && bond
->params
.primary
[0]) {
1630 /* if there is a primary slave, remember it */
1631 if (strcmp(bond
->params
.primary
, new_slave
->dev
->name
) == 0) {
1632 rcu_assign_pointer(bond
->primary_slave
, new_slave
);
1633 bond
->force_primary
= true;
1637 switch (BOND_MODE(bond
)) {
1638 case BOND_MODE_ACTIVEBACKUP
:
1639 bond_set_slave_inactive_flags(new_slave
,
1640 BOND_SLAVE_NOTIFY_NOW
);
1642 case BOND_MODE_8023AD
:
1643 /* in 802.3ad mode, the internal mechanism
1644 * will activate the slaves in the selected
1647 bond_set_slave_inactive_flags(new_slave
, BOND_SLAVE_NOTIFY_NOW
);
1648 /* if this is the first slave */
1650 SLAVE_AD_INFO(new_slave
)->id
= 1;
1651 /* Initialize AD with the number of times that the AD timer is called in 1 second
1652 * can be called only after the mac address of the bond is set
1654 bond_3ad_initialize(bond
, 1000/AD_TIMER_INTERVAL
);
1656 SLAVE_AD_INFO(new_slave
)->id
=
1657 SLAVE_AD_INFO(prev_slave
)->id
+ 1;
1660 bond_3ad_bind_slave(new_slave
);
1664 bond_set_active_slave(new_slave
);
1665 bond_set_slave_inactive_flags(new_slave
, BOND_SLAVE_NOTIFY_NOW
);
1668 netdev_dbg(bond_dev
, "This slave is always active in trunk mode\n");
1670 /* always active in trunk mode */
1671 bond_set_active_slave(new_slave
);
1673 /* In trunking mode there is little meaning to curr_active_slave
1674 * anyway (it holds no special properties of the bond device),
1675 * so we can change it without calling change_active_interface()
1677 if (!rcu_access_pointer(bond
->curr_active_slave
) &&
1678 new_slave
->link
== BOND_LINK_UP
)
1679 rcu_assign_pointer(bond
->curr_active_slave
, new_slave
);
1682 } /* switch(bond_mode) */
1684 #ifdef CONFIG_NET_POLL_CONTROLLER
1685 slave_dev
->npinfo
= bond
->dev
->npinfo
;
1686 if (slave_dev
->npinfo
) {
1687 if (slave_enable_netpoll(new_slave
)) {
1688 netdev_info(bond_dev
, "master_dev is using netpoll, but new slave device does not support netpoll\n");
1695 if (!(bond_dev
->features
& NETIF_F_LRO
))
1696 dev_disable_lro(slave_dev
);
1698 res
= netdev_rx_handler_register(slave_dev
, bond_handle_frame
,
1701 netdev_dbg(bond_dev
, "Error %d calling netdev_rx_handler_register\n", res
);
1705 res
= bond_master_upper_dev_link(bond
, new_slave
);
1707 netdev_dbg(bond_dev
, "Error %d calling bond_master_upper_dev_link\n", res
);
1708 goto err_unregister
;
1711 res
= bond_sysfs_slave_add(new_slave
);
1713 netdev_dbg(bond_dev
, "Error %d calling bond_sysfs_slave_add\n", res
);
1714 goto err_upper_unlink
;
1718 bond_compute_features(bond
);
1719 bond_set_carrier(bond
);
1721 if (bond_uses_primary(bond
)) {
1723 bond_select_active_slave(bond
);
1724 unblock_netpoll_tx();
1727 if (bond_mode_uses_xmit_hash(bond
))
1728 bond_update_slave_arr(bond
, NULL
);
1730 netdev_info(bond_dev
, "Enslaving %s as %s interface with %s link\n",
1732 bond_is_active_slave(new_slave
) ? "an active" : "a backup",
1733 new_slave
->link
!= BOND_LINK_DOWN
? "an up" : "a down");
1735 /* enslave is successful */
1736 bond_queue_slave_event(new_slave
);
1739 /* Undo stages on error */
1741 bond_upper_dev_unlink(bond
, new_slave
);
1744 netdev_rx_handler_unregister(slave_dev
);
1747 if (!bond_uses_primary(bond
))
1748 bond_hw_addr_flush(bond_dev
, slave_dev
);
1750 vlan_vids_del_by_dev(slave_dev
, bond_dev
);
1751 if (rcu_access_pointer(bond
->primary_slave
) == new_slave
)
1752 RCU_INIT_POINTER(bond
->primary_slave
, NULL
);
1753 if (rcu_access_pointer(bond
->curr_active_slave
) == new_slave
) {
1755 bond_change_active_slave(bond
, NULL
);
1756 bond_select_active_slave(bond
);
1757 unblock_netpoll_tx();
1759 /* either primary_slave or curr_active_slave might've changed */
1761 slave_disable_netpoll(new_slave
);
1764 slave_dev
->priv_flags
&= ~IFF_BONDING
;
1765 dev_close(slave_dev
);
1768 slave_dev
->flags
&= ~IFF_SLAVE
;
1769 if (!bond
->params
.fail_over_mac
||
1770 BOND_MODE(bond
) != BOND_MODE_ACTIVEBACKUP
) {
1771 /* XXX TODO - fom follow mode needs to change master's
1772 * MAC if this slave's MAC is in use by the bond, or at
1773 * least print a warning.
1775 ether_addr_copy(addr
.sa_data
, new_slave
->perm_hwaddr
);
1776 addr
.sa_family
= slave_dev
->type
;
1777 dev_set_mac_address(slave_dev
, &addr
);
1781 dev_set_mtu(slave_dev
, new_slave
->original_mtu
);
1784 bond_free_slave(new_slave
);
1787 /* Enslave of first slave has failed and we need to fix master's mac */
1788 if (!bond_has_slaves(bond
)) {
1789 if (ether_addr_equal_64bits(bond_dev
->dev_addr
,
1790 slave_dev
->dev_addr
))
1791 eth_hw_addr_random(bond_dev
);
1792 if (bond_dev
->type
!= ARPHRD_ETHER
) {
1793 dev_close(bond_dev
);
1794 ether_setup(bond_dev
);
1795 bond_dev
->flags
|= IFF_MASTER
;
1796 bond_dev
->priv_flags
&= ~IFF_TX_SKB_SHARING
;
1803 /* Try to release the slave device <slave> from the bond device <master>
1804 * It is legal to access curr_active_slave without a lock because all the function
1805 * is RTNL-locked. If "all" is true it means that the function is being called
1806 * while destroying a bond interface and all slaves are being released.
1808 * The rules for slave state should be:
1809 * for Active/Backup:
1810 * Active stays on all backups go down
1811 * for Bonded connections:
1812 * The first up interface should be left on and all others downed.
1814 static int __bond_release_one(struct net_device
*bond_dev
,
1815 struct net_device
*slave_dev
,
1818 struct bonding
*bond
= netdev_priv(bond_dev
);
1819 struct slave
*slave
, *oldcurrent
;
1820 struct sockaddr addr
;
1821 int old_flags
= bond_dev
->flags
;
1822 netdev_features_t old_features
= bond_dev
->features
;
1824 /* slave is not a slave or master is not master of this slave */
1825 if (!(slave_dev
->flags
& IFF_SLAVE
) ||
1826 !netdev_has_upper_dev(slave_dev
, bond_dev
)) {
1827 netdev_dbg(bond_dev
, "cannot release %s\n",
1834 slave
= bond_get_slave_by_dev(bond
, slave_dev
);
1836 /* not a slave of this bond */
1837 netdev_info(bond_dev
, "%s not enslaved\n",
1839 unblock_netpoll_tx();
1843 bond_set_slave_inactive_flags(slave
, BOND_SLAVE_NOTIFY_NOW
);
1845 bond_sysfs_slave_del(slave
);
1847 /* recompute stats just before removing the slave */
1848 bond_get_stats(bond
->dev
, &bond
->bond_stats
);
1850 bond_upper_dev_unlink(bond
, slave
);
1851 /* unregister rx_handler early so bond_handle_frame wouldn't be called
1852 * for this slave anymore.
1854 netdev_rx_handler_unregister(slave_dev
);
1856 if (BOND_MODE(bond
) == BOND_MODE_8023AD
)
1857 bond_3ad_unbind_slave(slave
);
1859 if (bond_mode_uses_xmit_hash(bond
))
1860 bond_update_slave_arr(bond
, slave
);
1862 netdev_info(bond_dev
, "Releasing %s interface %s\n",
1863 bond_is_active_slave(slave
) ? "active" : "backup",
1866 oldcurrent
= rcu_access_pointer(bond
->curr_active_slave
);
1868 RCU_INIT_POINTER(bond
->current_arp_slave
, NULL
);
1870 if (!all
&& (!bond
->params
.fail_over_mac
||
1871 BOND_MODE(bond
) != BOND_MODE_ACTIVEBACKUP
)) {
1872 if (ether_addr_equal_64bits(bond_dev
->dev_addr
, slave
->perm_hwaddr
) &&
1873 bond_has_slaves(bond
))
1874 netdev_warn(bond_dev
, "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",
1875 slave_dev
->name
, slave
->perm_hwaddr
,
1876 bond_dev
->name
, slave_dev
->name
);
1879 if (rtnl_dereference(bond
->primary_slave
) == slave
)
1880 RCU_INIT_POINTER(bond
->primary_slave
, NULL
);
1882 if (oldcurrent
== slave
)
1883 bond_change_active_slave(bond
, NULL
);
1885 if (bond_is_lb(bond
)) {
1886 /* Must be called only after the slave has been
1887 * detached from the list and the curr_active_slave
1888 * has been cleared (if our_slave == old_current),
1889 * but before a new active slave is selected.
1891 bond_alb_deinit_slave(bond
, slave
);
1895 RCU_INIT_POINTER(bond
->curr_active_slave
, NULL
);
1896 } else if (oldcurrent
== slave
) {
1897 /* Note that we hold RTNL over this sequence, so there
1898 * is no concern that another slave add/remove event
1901 bond_select_active_slave(bond
);
1904 if (!bond_has_slaves(bond
)) {
1905 bond_set_carrier(bond
);
1906 eth_hw_addr_random(bond_dev
);
1909 unblock_netpoll_tx();
1913 if (!bond_has_slaves(bond
)) {
1914 call_netdevice_notifiers(NETDEV_CHANGEADDR
, bond
->dev
);
1915 call_netdevice_notifiers(NETDEV_RELEASE
, bond
->dev
);
1918 bond_compute_features(bond
);
1919 if (!(bond_dev
->features
& NETIF_F_VLAN_CHALLENGED
) &&
1920 (old_features
& NETIF_F_VLAN_CHALLENGED
))
1921 netdev_info(bond_dev
, "last VLAN challenged slave %s left bond %s - VLAN blocking is removed\n",
1922 slave_dev
->name
, bond_dev
->name
);
1924 vlan_vids_del_by_dev(slave_dev
, bond_dev
);
1926 /* If the mode uses primary, then this case was handled above by
1927 * bond_change_active_slave(..., NULL)
1929 if (!bond_uses_primary(bond
)) {
1930 /* unset promiscuity level from slave
1931 * NOTE: The NETDEV_CHANGEADDR call above may change the value
1932 * of the IFF_PROMISC flag in the bond_dev, but we need the
1933 * value of that flag before that change, as that was the value
1934 * when this slave was attached, so we cache at the start of the
1935 * function and use it here. Same goes for ALLMULTI below
1937 if (old_flags
& IFF_PROMISC
)
1938 dev_set_promiscuity(slave_dev
, -1);
1940 /* unset allmulti level from slave */
1941 if (old_flags
& IFF_ALLMULTI
)
1942 dev_set_allmulti(slave_dev
, -1);
1944 bond_hw_addr_flush(bond_dev
, slave_dev
);
1947 slave_disable_netpoll(slave
);
1949 /* close slave before restoring its mac address */
1950 dev_close(slave_dev
);
1952 if (bond
->params
.fail_over_mac
!= BOND_FOM_ACTIVE
||
1953 BOND_MODE(bond
) != BOND_MODE_ACTIVEBACKUP
) {
1954 /* restore original ("permanent") mac address */
1955 ether_addr_copy(addr
.sa_data
, slave
->perm_hwaddr
);
1956 addr
.sa_family
= slave_dev
->type
;
1957 dev_set_mac_address(slave_dev
, &addr
);
1960 dev_set_mtu(slave_dev
, slave
->original_mtu
);
1962 slave_dev
->priv_flags
&= ~IFF_BONDING
;
1964 bond_free_slave(slave
);
1969 /* A wrapper used because of ndo_del_link */
1970 int bond_release(struct net_device
*bond_dev
, struct net_device
*slave_dev
)
1972 return __bond_release_one(bond_dev
, slave_dev
, false);
1975 /* First release a slave and then destroy the bond if no more slaves are left.
1976 * Must be under rtnl_lock when this function is called.
1978 static int bond_release_and_destroy(struct net_device
*bond_dev
,
1979 struct net_device
*slave_dev
)
1981 struct bonding
*bond
= netdev_priv(bond_dev
);
1984 ret
= bond_release(bond_dev
, slave_dev
);
1985 if (ret
== 0 && !bond_has_slaves(bond
)) {
1986 bond_dev
->priv_flags
|= IFF_DISABLE_NETPOLL
;
1987 netdev_info(bond_dev
, "Destroying bond %s\n",
1989 bond_remove_proc_entry(bond
);
1990 unregister_netdevice(bond_dev
);
1995 static int bond_info_query(struct net_device
*bond_dev
, struct ifbond
*info
)
1997 struct bonding
*bond
= netdev_priv(bond_dev
);
1998 bond_fill_ifbond(bond
, info
);
2002 static int bond_slave_info_query(struct net_device
*bond_dev
, struct ifslave
*info
)
2004 struct bonding
*bond
= netdev_priv(bond_dev
);
2005 struct list_head
*iter
;
2006 int i
= 0, res
= -ENODEV
;
2007 struct slave
*slave
;
2009 bond_for_each_slave(bond
, slave
, iter
) {
2010 if (i
++ == (int)info
->slave_id
) {
2012 bond_fill_ifslave(slave
, info
);
2020 /*-------------------------------- Monitoring -------------------------------*/
2022 /* called with rcu_read_lock() */
2023 static int bond_miimon_inspect(struct bonding
*bond
)
2025 int link_state
, commit
= 0;
2026 struct list_head
*iter
;
2027 struct slave
*slave
;
2028 bool ignore_updelay
;
2030 ignore_updelay
= !rcu_dereference(bond
->curr_active_slave
);
2032 bond_for_each_slave_rcu(bond
, slave
, iter
) {
2033 slave
->new_link
= BOND_LINK_NOCHANGE
;
2035 link_state
= bond_check_dev_link(bond
, slave
->dev
, 0);
2037 switch (slave
->link
) {
2042 bond_set_slave_link_state(slave
, BOND_LINK_FAIL
,
2043 BOND_SLAVE_NOTIFY_LATER
);
2044 slave
->delay
= bond
->params
.downdelay
;
2046 netdev_info(bond
->dev
, "link status down for %sinterface %s, disabling it in %d ms\n",
2048 BOND_MODE_ACTIVEBACKUP
) ?
2049 (bond_is_active_slave(slave
) ?
2050 "active " : "backup ") : "",
2052 bond
->params
.downdelay
* bond
->params
.miimon
);
2055 case BOND_LINK_FAIL
:
2057 /* recovered before downdelay expired */
2058 bond_set_slave_link_state(slave
, BOND_LINK_UP
,
2059 BOND_SLAVE_NOTIFY_LATER
);
2060 slave
->last_link_up
= jiffies
;
2061 netdev_info(bond
->dev
, "link status up again after %d ms for interface %s\n",
2062 (bond
->params
.downdelay
- slave
->delay
) *
2063 bond
->params
.miimon
,
2068 if (slave
->delay
<= 0) {
2069 slave
->new_link
= BOND_LINK_DOWN
;
2077 case BOND_LINK_DOWN
:
2081 bond_set_slave_link_state(slave
, BOND_LINK_BACK
,
2082 BOND_SLAVE_NOTIFY_LATER
);
2083 slave
->delay
= bond
->params
.updelay
;
2086 netdev_info(bond
->dev
, "link status up for interface %s, enabling it in %d ms\n",
2088 ignore_updelay
? 0 :
2089 bond
->params
.updelay
*
2090 bond
->params
.miimon
);
2093 case BOND_LINK_BACK
:
2095 bond_set_slave_link_state(slave
,
2097 BOND_SLAVE_NOTIFY_LATER
);
2098 netdev_info(bond
->dev
, "link status down again after %d ms for interface %s\n",
2099 (bond
->params
.updelay
- slave
->delay
) *
2100 bond
->params
.miimon
,
2109 if (slave
->delay
<= 0) {
2110 slave
->new_link
= BOND_LINK_UP
;
2112 ignore_updelay
= false;
2124 static void bond_miimon_commit(struct bonding
*bond
)
2126 struct list_head
*iter
;
2127 struct slave
*slave
, *primary
;
2129 bond_for_each_slave(bond
, slave
, iter
) {
2130 switch (slave
->new_link
) {
2131 case BOND_LINK_NOCHANGE
:
2135 bond_update_speed_duplex(slave
);
2136 bond_set_slave_link_state(slave
, BOND_LINK_UP
,
2137 BOND_SLAVE_NOTIFY_NOW
);
2138 slave
->last_link_up
= jiffies
;
2140 primary
= rtnl_dereference(bond
->primary_slave
);
2141 if (BOND_MODE(bond
) == BOND_MODE_8023AD
) {
2142 /* prevent it from being the active one */
2143 bond_set_backup_slave(slave
);
2144 } else if (BOND_MODE(bond
) != BOND_MODE_ACTIVEBACKUP
) {
2145 /* make it immediately active */
2146 bond_set_active_slave(slave
);
2147 } else if (slave
!= primary
) {
2148 /* prevent it from being the active one */
2149 bond_set_backup_slave(slave
);
2152 netdev_info(bond
->dev
, "link status definitely up for interface %s, %u Mbps %s duplex\n",
2154 slave
->speed
== SPEED_UNKNOWN
? 0 : slave
->speed
,
2155 slave
->duplex
? "full" : "half");
2157 /* notify ad that the link status has changed */
2158 if (BOND_MODE(bond
) == BOND_MODE_8023AD
)
2159 bond_3ad_handle_link_change(slave
, BOND_LINK_UP
);
2161 if (bond_is_lb(bond
))
2162 bond_alb_handle_link_change(bond
, slave
,
2165 if (BOND_MODE(bond
) == BOND_MODE_XOR
)
2166 bond_update_slave_arr(bond
, NULL
);
2168 if (!bond
->curr_active_slave
|| slave
== primary
)
2173 case BOND_LINK_DOWN
:
2174 if (slave
->link_failure_count
< UINT_MAX
)
2175 slave
->link_failure_count
++;
2177 bond_set_slave_link_state(slave
, BOND_LINK_DOWN
,
2178 BOND_SLAVE_NOTIFY_NOW
);
2180 if (BOND_MODE(bond
) == BOND_MODE_ACTIVEBACKUP
||
2181 BOND_MODE(bond
) == BOND_MODE_8023AD
)
2182 bond_set_slave_inactive_flags(slave
,
2183 BOND_SLAVE_NOTIFY_NOW
);
2185 netdev_info(bond
->dev
, "link status definitely down for interface %s, disabling it\n",
2188 if (BOND_MODE(bond
) == BOND_MODE_8023AD
)
2189 bond_3ad_handle_link_change(slave
,
2192 if (bond_is_lb(bond
))
2193 bond_alb_handle_link_change(bond
, slave
,
2196 if (BOND_MODE(bond
) == BOND_MODE_XOR
)
2197 bond_update_slave_arr(bond
, NULL
);
2199 if (slave
== rcu_access_pointer(bond
->curr_active_slave
))
2205 netdev_err(bond
->dev
, "invalid new link %d on slave %s\n",
2206 slave
->new_link
, slave
->dev
->name
);
2207 slave
->new_link
= BOND_LINK_NOCHANGE
;
2214 bond_select_active_slave(bond
);
2215 unblock_netpoll_tx();
2218 bond_set_carrier(bond
);
2223 * Really a wrapper that splits the mii monitor into two phases: an
2224 * inspection, then (if inspection indicates something needs to be done)
2225 * an acquisition of appropriate locks followed by a commit phase to
2226 * implement whatever link state changes are indicated.
2228 static void bond_mii_monitor(struct work_struct
*work
)
2230 struct bonding
*bond
= container_of(work
, struct bonding
,
2232 bool should_notify_peers
= false;
2233 unsigned long delay
;
2235 delay
= msecs_to_jiffies(bond
->params
.miimon
);
2237 if (!bond_has_slaves(bond
))
2242 should_notify_peers
= bond_should_notify_peers(bond
);
2244 if (bond_miimon_inspect(bond
)) {
2247 /* Race avoidance with bond_close cancel of workqueue */
2248 if (!rtnl_trylock()) {
2250 should_notify_peers
= false;
2254 bond_miimon_commit(bond
);
2256 rtnl_unlock(); /* might sleep, hold no other locks */
2261 if (bond
->params
.miimon
)
2262 queue_delayed_work(bond
->wq
, &bond
->mii_work
, delay
);
2264 if (should_notify_peers
) {
2265 if (!rtnl_trylock())
2267 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS
, bond
->dev
);
2272 static bool bond_has_this_ip(struct bonding
*bond
, __be32 ip
)
2274 struct net_device
*upper
;
2275 struct list_head
*iter
;
2278 if (ip
== bond_confirm_addr(bond
->dev
, 0, ip
))
2282 netdev_for_each_all_upper_dev_rcu(bond
->dev
, upper
, iter
) {
2283 if (ip
== bond_confirm_addr(upper
, 0, ip
)) {
2293 /* We go to the (large) trouble of VLAN tagging ARP frames because
2294 * switches in VLAN mode (especially if ports are configured as
2295 * "native" to a VLAN) might not pass non-tagged frames.
2297 static void bond_arp_send(struct net_device
*slave_dev
, int arp_op
,
2298 __be32 dest_ip
, __be32 src_ip
,
2299 struct bond_vlan_tag
*tags
)
2301 struct sk_buff
*skb
;
2302 struct bond_vlan_tag
*outer_tag
= tags
;
2304 netdev_dbg(slave_dev
, "arp %d on slave %s: dst %pI4 src %pI4\n",
2305 arp_op
, slave_dev
->name
, &dest_ip
, &src_ip
);
2307 skb
= arp_create(arp_op
, ETH_P_ARP
, dest_ip
, slave_dev
, src_ip
,
2308 NULL
, slave_dev
->dev_addr
, NULL
);
2311 net_err_ratelimited("ARP packet allocation failed\n");
2315 if (!tags
|| tags
->vlan_proto
== VLAN_N_VID
)
2320 /* Go through all the tags backwards and add them to the packet */
2321 while (tags
->vlan_proto
!= VLAN_N_VID
) {
2322 if (!tags
->vlan_id
) {
2327 netdev_dbg(slave_dev
, "inner tag: proto %X vid %X\n",
2328 ntohs(outer_tag
->vlan_proto
), tags
->vlan_id
);
2329 skb
= vlan_insert_tag_set_proto(skb
, tags
->vlan_proto
,
2332 net_err_ratelimited("failed to insert inner VLAN tag\n");
2338 /* Set the outer tag */
2339 if (outer_tag
->vlan_id
) {
2340 netdev_dbg(slave_dev
, "outer tag: proto %X vid %X\n",
2341 ntohs(outer_tag
->vlan_proto
), outer_tag
->vlan_id
);
2342 __vlan_hwaccel_put_tag(skb
, outer_tag
->vlan_proto
,
2343 outer_tag
->vlan_id
);
2350 /* Validate the device path between the @start_dev and the @end_dev.
2351 * The path is valid if the @end_dev is reachable through device
2353 * When the path is validated, collect any vlan information in the
2356 struct bond_vlan_tag
*bond_verify_device_path(struct net_device
*start_dev
,
2357 struct net_device
*end_dev
,
2360 struct bond_vlan_tag
*tags
;
2361 struct net_device
*upper
;
2362 struct list_head
*iter
;
2364 if (start_dev
== end_dev
) {
2365 tags
= kzalloc(sizeof(*tags
) * (level
+ 1), GFP_ATOMIC
);
2367 return ERR_PTR(-ENOMEM
);
2368 tags
[level
].vlan_proto
= VLAN_N_VID
;
2372 netdev_for_each_upper_dev_rcu(start_dev
, upper
, iter
) {
2373 tags
= bond_verify_device_path(upper
, end_dev
, level
+ 1);
2374 if (IS_ERR_OR_NULL(tags
)) {
2379 if (is_vlan_dev(upper
)) {
2380 tags
[level
].vlan_proto
= vlan_dev_vlan_proto(upper
);
2381 tags
[level
].vlan_id
= vlan_dev_vlan_id(upper
);
2390 static void bond_arp_send_all(struct bonding
*bond
, struct slave
*slave
)
2393 struct bond_vlan_tag
*tags
;
2394 __be32
*targets
= bond
->params
.arp_targets
, addr
;
2397 for (i
= 0; i
< BOND_MAX_ARP_TARGETS
&& targets
[i
]; i
++) {
2398 netdev_dbg(bond
->dev
, "basa: target %pI4\n", &targets
[i
]);
2401 /* Find out through which dev should the packet go */
2402 rt
= ip_route_output(dev_net(bond
->dev
), targets
[i
], 0,
2405 /* there's no route to target - try to send arp
2406 * probe to generate any traffic (arp_validate=0)
2408 if (bond
->params
.arp_validate
)
2409 net_warn_ratelimited("%s: no route to arp_ip_target %pI4 and arp_validate is set\n",
2412 bond_arp_send(slave
->dev
, ARPOP_REQUEST
, targets
[i
],
2417 /* bond device itself */
2418 if (rt
->dst
.dev
== bond
->dev
)
2422 tags
= bond_verify_device_path(bond
->dev
, rt
->dst
.dev
, 0);
2425 if (!IS_ERR_OR_NULL(tags
))
2428 /* Not our device - skip */
2429 netdev_dbg(bond
->dev
, "no path to arp_ip_target %pI4 via rt.dev %s\n",
2430 &targets
[i
], rt
->dst
.dev
? rt
->dst
.dev
->name
: "NULL");
2436 addr
= bond_confirm_addr(rt
->dst
.dev
, targets
[i
], 0);
2438 bond_arp_send(slave
->dev
, ARPOP_REQUEST
, targets
[i
],
2444 static void bond_validate_arp(struct bonding
*bond
, struct slave
*slave
, __be32 sip
, __be32 tip
)
2448 if (!sip
|| !bond_has_this_ip(bond
, tip
)) {
2449 netdev_dbg(bond
->dev
, "bva: sip %pI4 tip %pI4 not found\n",
2454 i
= bond_get_targets_ip(bond
->params
.arp_targets
, sip
);
2456 netdev_dbg(bond
->dev
, "bva: sip %pI4 not found in targets\n",
2460 slave
->last_rx
= jiffies
;
2461 slave
->target_last_arp_rx
[i
] = jiffies
;
2464 int bond_arp_rcv(const struct sk_buff
*skb
, struct bonding
*bond
,
2465 struct slave
*slave
)
2467 struct arphdr
*arp
= (struct arphdr
*)skb
->data
;
2468 struct slave
*curr_active_slave
, *curr_arp_slave
;
2469 unsigned char *arp_ptr
;
2471 int alen
, is_arp
= skb
->protocol
== __cpu_to_be16(ETH_P_ARP
);
2473 if (!slave_do_arp_validate(bond
, slave
)) {
2474 if ((slave_do_arp_validate_only(bond
) && is_arp
) ||
2475 !slave_do_arp_validate_only(bond
))
2476 slave
->last_rx
= jiffies
;
2477 return RX_HANDLER_ANOTHER
;
2478 } else if (!is_arp
) {
2479 return RX_HANDLER_ANOTHER
;
2482 alen
= arp_hdr_len(bond
->dev
);
2484 netdev_dbg(bond
->dev
, "bond_arp_rcv: skb->dev %s\n",
2487 if (alen
> skb_headlen(skb
)) {
2488 arp
= kmalloc(alen
, GFP_ATOMIC
);
2491 if (skb_copy_bits(skb
, 0, arp
, alen
) < 0)
2495 if (arp
->ar_hln
!= bond
->dev
->addr_len
||
2496 skb
->pkt_type
== PACKET_OTHERHOST
||
2497 skb
->pkt_type
== PACKET_LOOPBACK
||
2498 arp
->ar_hrd
!= htons(ARPHRD_ETHER
) ||
2499 arp
->ar_pro
!= htons(ETH_P_IP
) ||
2503 arp_ptr
= (unsigned char *)(arp
+ 1);
2504 arp_ptr
+= bond
->dev
->addr_len
;
2505 memcpy(&sip
, arp_ptr
, 4);
2506 arp_ptr
+= 4 + bond
->dev
->addr_len
;
2507 memcpy(&tip
, arp_ptr
, 4);
2509 netdev_dbg(bond
->dev
, "bond_arp_rcv: %s/%d av %d sv %d sip %pI4 tip %pI4\n",
2510 slave
->dev
->name
, bond_slave_state(slave
),
2511 bond
->params
.arp_validate
, slave_do_arp_validate(bond
, slave
),
2514 curr_active_slave
= rcu_dereference(bond
->curr_active_slave
);
2515 curr_arp_slave
= rcu_dereference(bond
->current_arp_slave
);
2517 /* We 'trust' the received ARP enough to validate it if:
2519 * (a) the slave receiving the ARP is active (which includes the
2520 * current ARP slave, if any), or
2522 * (b) the receiving slave isn't active, but there is a currently
2523 * active slave and it received valid arp reply(s) after it became
2524 * the currently active slave, or
2526 * (c) there is an ARP slave that sent an ARP during the prior ARP
2527 * interval, and we receive an ARP reply on any slave. We accept
2528 * these because switch FDB update delays may deliver the ARP
2529 * reply to a slave other than the sender of the ARP request.
2531 * Note: for (b), backup slaves are receiving the broadcast ARP
2532 * request, not a reply. This request passes from the sending
2533 * slave through the L2 switch(es) to the receiving slave. Since
2534 * this is checking the request, sip/tip are swapped for
2537 * This is done to avoid endless looping when we can't reach the
2538 * arp_ip_target and fool ourselves with our own arp requests.
2540 if (bond_is_active_slave(slave
))
2541 bond_validate_arp(bond
, slave
, sip
, tip
);
2542 else if (curr_active_slave
&&
2543 time_after(slave_last_rx(bond
, curr_active_slave
),
2544 curr_active_slave
->last_link_up
))
2545 bond_validate_arp(bond
, slave
, tip
, sip
);
2546 else if (curr_arp_slave
&& (arp
->ar_op
== htons(ARPOP_REPLY
)) &&
2547 bond_time_in_interval(bond
,
2548 dev_trans_start(curr_arp_slave
->dev
), 1))
2549 bond_validate_arp(bond
, slave
, sip
, tip
);
2552 if (arp
!= (struct arphdr
*)skb
->data
)
2554 return RX_HANDLER_ANOTHER
;
2557 /* function to verify if we're in the arp_interval timeslice, returns true if
2558 * (last_act - arp_interval) <= jiffies <= (last_act + mod * arp_interval +
2559 * arp_interval/2) . the arp_interval/2 is needed for really fast networks.
2561 static bool bond_time_in_interval(struct bonding
*bond
, unsigned long last_act
,
2564 int delta_in_ticks
= msecs_to_jiffies(bond
->params
.arp_interval
);
2566 return time_in_range(jiffies
,
2567 last_act
- delta_in_ticks
,
2568 last_act
+ mod
* delta_in_ticks
+ delta_in_ticks
/2);
2571 /* This function is called regularly to monitor each slave's link
2572 * ensuring that traffic is being sent and received when arp monitoring
2573 * is used in load-balancing mode. if the adapter has been dormant, then an
2574 * arp is transmitted to generate traffic. see activebackup_arp_monitor for
2575 * arp monitoring in active backup mode.
2577 static void bond_loadbalance_arp_mon(struct work_struct
*work
)
2579 struct bonding
*bond
= container_of(work
, struct bonding
,
2581 struct slave
*slave
, *oldcurrent
;
2582 struct list_head
*iter
;
2583 int do_failover
= 0, slave_state_changed
= 0;
2585 if (!bond_has_slaves(bond
))
2590 oldcurrent
= rcu_dereference(bond
->curr_active_slave
);
2591 /* see if any of the previous devices are up now (i.e. they have
2592 * xmt and rcv traffic). the curr_active_slave does not come into
2593 * the picture unless it is null. also, slave->last_link_up is not
2594 * needed here because we send an arp on each slave and give a slave
2595 * as long as it needs to get the tx/rx within the delta.
2596 * TODO: what about up/down delay in arp mode? it wasn't here before
2599 bond_for_each_slave_rcu(bond
, slave
, iter
) {
2600 unsigned long trans_start
= dev_trans_start(slave
->dev
);
2602 if (slave
->link
!= BOND_LINK_UP
) {
2603 if (bond_time_in_interval(bond
, trans_start
, 1) &&
2604 bond_time_in_interval(bond
, slave
->last_rx
, 1)) {
2606 slave
->link
= BOND_LINK_UP
;
2607 slave_state_changed
= 1;
2609 /* primary_slave has no meaning in round-robin
2610 * mode. the window of a slave being up and
2611 * curr_active_slave being null after enslaving
2615 netdev_info(bond
->dev
, "link status definitely up for interface %s\n",
2619 netdev_info(bond
->dev
, "interface %s is now up\n",
2624 /* slave->link == BOND_LINK_UP */
2626 /* not all switches will respond to an arp request
2627 * when the source ip is 0, so don't take the link down
2628 * if we don't know our ip yet
2630 if (!bond_time_in_interval(bond
, trans_start
, 2) ||
2631 !bond_time_in_interval(bond
, slave
->last_rx
, 2)) {
2633 slave
->link
= BOND_LINK_DOWN
;
2634 slave_state_changed
= 1;
2636 if (slave
->link_failure_count
< UINT_MAX
)
2637 slave
->link_failure_count
++;
2639 netdev_info(bond
->dev
, "interface %s is now down\n",
2642 if (slave
== oldcurrent
)
2647 /* note: if switch is in round-robin mode, all links
2648 * must tx arp to ensure all links rx an arp - otherwise
2649 * links may oscillate or not come up at all; if switch is
2650 * in something like xor mode, there is nothing we can
2651 * do - all replies will be rx'ed on same link causing slaves
2652 * to be unstable during low/no traffic periods
2654 if (bond_slave_is_up(slave
))
2655 bond_arp_send_all(bond
, slave
);
2660 if (do_failover
|| slave_state_changed
) {
2661 if (!rtnl_trylock())
2664 if (slave_state_changed
) {
2665 bond_slave_state_change(bond
);
2666 if (BOND_MODE(bond
) == BOND_MODE_XOR
)
2667 bond_update_slave_arr(bond
, NULL
);
2671 bond_select_active_slave(bond
);
2672 unblock_netpoll_tx();
2678 if (bond
->params
.arp_interval
)
2679 queue_delayed_work(bond
->wq
, &bond
->arp_work
,
2680 msecs_to_jiffies(bond
->params
.arp_interval
));
2683 /* Called to inspect slaves for active-backup mode ARP monitor link state
2684 * changes. Sets new_link in slaves to specify what action should take
2685 * place for the slave. Returns 0 if no changes are found, >0 if changes
2686 * to link states must be committed.
2688 * Called with rcu_read_lock held.
2690 static int bond_ab_arp_inspect(struct bonding
*bond
)
2692 unsigned long trans_start
, last_rx
;
2693 struct list_head
*iter
;
2694 struct slave
*slave
;
2697 bond_for_each_slave_rcu(bond
, slave
, iter
) {
2698 slave
->new_link
= BOND_LINK_NOCHANGE
;
2699 last_rx
= slave_last_rx(bond
, slave
);
2701 if (slave
->link
!= BOND_LINK_UP
) {
2702 if (bond_time_in_interval(bond
, last_rx
, 1)) {
2703 slave
->new_link
= BOND_LINK_UP
;
2709 /* Give slaves 2*delta after being enslaved or made
2710 * active. This avoids bouncing, as the last receive
2711 * times need a full ARP monitor cycle to be updated.
2713 if (bond_time_in_interval(bond
, slave
->last_link_up
, 2))
2716 /* Backup slave is down if:
2717 * - No current_arp_slave AND
2718 * - more than 3*delta since last receive AND
2719 * - the bond has an IP address
2721 * Note: a non-null current_arp_slave indicates
2722 * the curr_active_slave went down and we are
2723 * searching for a new one; under this condition
2724 * we only take the curr_active_slave down - this
2725 * gives each slave a chance to tx/rx traffic
2726 * before being taken out
2728 if (!bond_is_active_slave(slave
) &&
2729 !rcu_access_pointer(bond
->current_arp_slave
) &&
2730 !bond_time_in_interval(bond
, last_rx
, 3)) {
2731 slave
->new_link
= BOND_LINK_DOWN
;
2735 /* Active slave is down if:
2736 * - more than 2*delta since transmitting OR
2737 * - (more than 2*delta since receive AND
2738 * the bond has an IP address)
2740 trans_start
= dev_trans_start(slave
->dev
);
2741 if (bond_is_active_slave(slave
) &&
2742 (!bond_time_in_interval(bond
, trans_start
, 2) ||
2743 !bond_time_in_interval(bond
, last_rx
, 2))) {
2744 slave
->new_link
= BOND_LINK_DOWN
;
2752 /* Called to commit link state changes noted by inspection step of
2753 * active-backup mode ARP monitor.
2755 * Called with RTNL hold.
2757 static void bond_ab_arp_commit(struct bonding
*bond
)
2759 unsigned long trans_start
;
2760 struct list_head
*iter
;
2761 struct slave
*slave
;
2763 bond_for_each_slave(bond
, slave
, iter
) {
2764 switch (slave
->new_link
) {
2765 case BOND_LINK_NOCHANGE
:
2769 trans_start
= dev_trans_start(slave
->dev
);
2770 if (rtnl_dereference(bond
->curr_active_slave
) != slave
||
2771 (!rtnl_dereference(bond
->curr_active_slave
) &&
2772 bond_time_in_interval(bond
, trans_start
, 1))) {
2773 struct slave
*current_arp_slave
;
2775 current_arp_slave
= rtnl_dereference(bond
->current_arp_slave
);
2776 bond_set_slave_link_state(slave
, BOND_LINK_UP
,
2777 BOND_SLAVE_NOTIFY_NOW
);
2778 if (current_arp_slave
) {
2779 bond_set_slave_inactive_flags(
2781 BOND_SLAVE_NOTIFY_NOW
);
2782 RCU_INIT_POINTER(bond
->current_arp_slave
, NULL
);
2785 netdev_info(bond
->dev
, "link status definitely up for interface %s\n",
2788 if (!rtnl_dereference(bond
->curr_active_slave
) ||
2789 slave
== rtnl_dereference(bond
->primary_slave
))
2796 case BOND_LINK_DOWN
:
2797 if (slave
->link_failure_count
< UINT_MAX
)
2798 slave
->link_failure_count
++;
2800 bond_set_slave_link_state(slave
, BOND_LINK_DOWN
,
2801 BOND_SLAVE_NOTIFY_NOW
);
2802 bond_set_slave_inactive_flags(slave
,
2803 BOND_SLAVE_NOTIFY_NOW
);
2805 netdev_info(bond
->dev
, "link status definitely down for interface %s, disabling it\n",
2808 if (slave
== rtnl_dereference(bond
->curr_active_slave
)) {
2809 RCU_INIT_POINTER(bond
->current_arp_slave
, NULL
);
2816 netdev_err(bond
->dev
, "impossible: new_link %d on slave %s\n",
2817 slave
->new_link
, slave
->dev
->name
);
2823 bond_select_active_slave(bond
);
2824 unblock_netpoll_tx();
2827 bond_set_carrier(bond
);
2830 /* Send ARP probes for active-backup mode ARP monitor.
2832 * Called with rcu_read_lock held.
2834 static bool bond_ab_arp_probe(struct bonding
*bond
)
2836 struct slave
*slave
, *before
= NULL
, *new_slave
= NULL
,
2837 *curr_arp_slave
= rcu_dereference(bond
->current_arp_slave
),
2838 *curr_active_slave
= rcu_dereference(bond
->curr_active_slave
);
2839 struct list_head
*iter
;
2841 bool should_notify_rtnl
= BOND_SLAVE_NOTIFY_LATER
;
2843 if (curr_arp_slave
&& curr_active_slave
)
2844 netdev_info(bond
->dev
, "PROBE: c_arp %s && cas %s BAD\n",
2845 curr_arp_slave
->dev
->name
,
2846 curr_active_slave
->dev
->name
);
2848 if (curr_active_slave
) {
2849 bond_arp_send_all(bond
, curr_active_slave
);
2850 return should_notify_rtnl
;
2853 /* if we don't have a curr_active_slave, search for the next available
2854 * backup slave from the current_arp_slave and make it the candidate
2855 * for becoming the curr_active_slave
2858 if (!curr_arp_slave
) {
2859 curr_arp_slave
= bond_first_slave_rcu(bond
);
2860 if (!curr_arp_slave
)
2861 return should_notify_rtnl
;
2864 bond_set_slave_inactive_flags(curr_arp_slave
, BOND_SLAVE_NOTIFY_LATER
);
2866 bond_for_each_slave_rcu(bond
, slave
, iter
) {
2867 if (!found
&& !before
&& bond_slave_is_up(slave
))
2870 if (found
&& !new_slave
&& bond_slave_is_up(slave
))
2872 /* if the link state is up at this point, we
2873 * mark it down - this can happen if we have
2874 * simultaneous link failures and
2875 * reselect_active_interface doesn't make this
2876 * one the current slave so it is still marked
2877 * up when it is actually down
2879 if (!bond_slave_is_up(slave
) && slave
->link
== BOND_LINK_UP
) {
2880 bond_set_slave_link_state(slave
, BOND_LINK_DOWN
,
2881 BOND_SLAVE_NOTIFY_LATER
);
2882 if (slave
->link_failure_count
< UINT_MAX
)
2883 slave
->link_failure_count
++;
2885 bond_set_slave_inactive_flags(slave
,
2886 BOND_SLAVE_NOTIFY_LATER
);
2888 netdev_info(bond
->dev
, "backup interface %s is now down\n",
2891 if (slave
== curr_arp_slave
)
2895 if (!new_slave
&& before
)
2901 bond_set_slave_link_state(new_slave
, BOND_LINK_BACK
,
2902 BOND_SLAVE_NOTIFY_LATER
);
2903 bond_set_slave_active_flags(new_slave
, BOND_SLAVE_NOTIFY_LATER
);
2904 bond_arp_send_all(bond
, new_slave
);
2905 new_slave
->last_link_up
= jiffies
;
2906 rcu_assign_pointer(bond
->current_arp_slave
, new_slave
);
2909 bond_for_each_slave_rcu(bond
, slave
, iter
) {
2910 if (slave
->should_notify
|| slave
->should_notify_link
) {
2911 should_notify_rtnl
= BOND_SLAVE_NOTIFY_NOW
;
2915 return should_notify_rtnl
;
2918 static void bond_activebackup_arp_mon(struct work_struct
*work
)
2920 struct bonding
*bond
= container_of(work
, struct bonding
,
2922 bool should_notify_peers
= false;
2923 bool should_notify_rtnl
= false;
2926 delta_in_ticks
= msecs_to_jiffies(bond
->params
.arp_interval
);
2928 if (!bond_has_slaves(bond
))
2933 should_notify_peers
= bond_should_notify_peers(bond
);
2935 if (bond_ab_arp_inspect(bond
)) {
2938 /* Race avoidance with bond_close flush of workqueue */
2939 if (!rtnl_trylock()) {
2941 should_notify_peers
= false;
2945 bond_ab_arp_commit(bond
);
2951 should_notify_rtnl
= bond_ab_arp_probe(bond
);
2955 if (bond
->params
.arp_interval
)
2956 queue_delayed_work(bond
->wq
, &bond
->arp_work
, delta_in_ticks
);
2958 if (should_notify_peers
|| should_notify_rtnl
) {
2959 if (!rtnl_trylock())
2962 if (should_notify_peers
)
2963 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS
,
2965 if (should_notify_rtnl
) {
2966 bond_slave_state_notify(bond
);
2967 bond_slave_link_notify(bond
);
2974 /*-------------------------- netdev event handling --------------------------*/
2976 /* Change device name */
2977 static int bond_event_changename(struct bonding
*bond
)
2979 bond_remove_proc_entry(bond
);
2980 bond_create_proc_entry(bond
);
2982 bond_debug_reregister(bond
);
2987 static int bond_master_netdev_event(unsigned long event
,
2988 struct net_device
*bond_dev
)
2990 struct bonding
*event_bond
= netdev_priv(bond_dev
);
2993 case NETDEV_CHANGENAME
:
2994 return bond_event_changename(event_bond
);
2995 case NETDEV_UNREGISTER
:
2996 bond_remove_proc_entry(event_bond
);
2998 case NETDEV_REGISTER
:
2999 bond_create_proc_entry(event_bond
);
3001 case NETDEV_NOTIFY_PEERS
:
3002 if (event_bond
->send_peer_notif
)
3003 event_bond
->send_peer_notif
--;
3012 static int bond_slave_netdev_event(unsigned long event
,
3013 struct net_device
*slave_dev
)
3015 struct slave
*slave
= bond_slave_get_rtnl(slave_dev
), *primary
;
3016 struct bonding
*bond
;
3017 struct net_device
*bond_dev
;
3019 /* A netdev event can be generated while enslaving a device
3020 * before netdev_rx_handler_register is called in which case
3021 * slave will be NULL
3025 bond_dev
= slave
->bond
->dev
;
3027 primary
= rtnl_dereference(bond
->primary_slave
);
3030 case NETDEV_UNREGISTER
:
3031 if (bond_dev
->type
!= ARPHRD_ETHER
)
3032 bond_release_and_destroy(bond_dev
, slave_dev
);
3034 bond_release(bond_dev
, slave_dev
);
3038 bond_update_speed_duplex(slave
);
3039 if (BOND_MODE(bond
) == BOND_MODE_8023AD
)
3040 bond_3ad_adapter_speed_duplex_changed(slave
);
3043 /* Refresh slave-array if applicable!
3044 * If the setup does not use miimon or arpmon (mode-specific!),
3045 * then these events will not cause the slave-array to be
3046 * refreshed. This will cause xmit to use a slave that is not
3047 * usable. Avoid such situation by refeshing the array at these
3048 * events. If these (miimon/arpmon) parameters are configured
3049 * then array gets refreshed twice and that should be fine!
3051 if (bond_mode_uses_xmit_hash(bond
))
3052 bond_update_slave_arr(bond
, NULL
);
3054 case NETDEV_CHANGEMTU
:
3055 /* TODO: Should slaves be allowed to
3056 * independently alter their MTU? For
3057 * an active-backup bond, slaves need
3058 * not be the same type of device, so
3059 * MTUs may vary. For other modes,
3060 * slaves arguably should have the
3061 * same MTUs. To do this, we'd need to
3062 * take over the slave's change_mtu
3063 * function for the duration of their
3067 case NETDEV_CHANGENAME
:
3068 /* we don't care if we don't have primary set */
3069 if (!bond_uses_primary(bond
) ||
3070 !bond
->params
.primary
[0])
3073 if (slave
== primary
) {
3074 /* slave's name changed - he's no longer primary */
3075 RCU_INIT_POINTER(bond
->primary_slave
, NULL
);
3076 } else if (!strcmp(slave_dev
->name
, bond
->params
.primary
)) {
3077 /* we have a new primary slave */
3078 rcu_assign_pointer(bond
->primary_slave
, slave
);
3079 } else { /* we didn't change primary - exit */
3083 netdev_info(bond
->dev
, "Primary slave changed to %s, reselecting active slave\n",
3084 primary
? slave_dev
->name
: "none");
3087 bond_select_active_slave(bond
);
3088 unblock_netpoll_tx();
3090 case NETDEV_FEAT_CHANGE
:
3091 bond_compute_features(bond
);
3093 case NETDEV_RESEND_IGMP
:
3094 /* Propagate to master device */
3095 call_netdevice_notifiers(event
, slave
->bond
->dev
);
3104 /* bond_netdev_event: handle netdev notifier chain events.
3106 * This function receives events for the netdev chain. The caller (an
3107 * ioctl handler calling blocking_notifier_call_chain) holds the necessary
3108 * locks for us to safely manipulate the slave devices (RTNL lock,
3111 static int bond_netdev_event(struct notifier_block
*this,
3112 unsigned long event
, void *ptr
)
3114 struct net_device
*event_dev
= netdev_notifier_info_to_dev(ptr
);
3116 netdev_dbg(event_dev
, "event: %lx\n", event
);
3118 if (!(event_dev
->priv_flags
& IFF_BONDING
))
3121 if (event_dev
->flags
& IFF_MASTER
) {
3122 netdev_dbg(event_dev
, "IFF_MASTER\n");
3123 return bond_master_netdev_event(event
, event_dev
);
3126 if (event_dev
->flags
& IFF_SLAVE
) {
3127 netdev_dbg(event_dev
, "IFF_SLAVE\n");
3128 return bond_slave_netdev_event(event
, event_dev
);
3134 static struct notifier_block bond_netdev_notifier
= {
3135 .notifier_call
= bond_netdev_event
,
3138 /*---------------------------- Hashing Policies -----------------------------*/
3140 /* L2 hash helper */
3141 static inline u32
bond_eth_hash(struct sk_buff
*skb
)
3143 struct ethhdr
*ep
, hdr_tmp
;
3145 ep
= skb_header_pointer(skb
, 0, sizeof(hdr_tmp
), &hdr_tmp
);
3147 return ep
->h_dest
[5] ^ ep
->h_source
[5] ^ ep
->h_proto
;
3151 /* Extract the appropriate headers based on bond's xmit policy */
3152 static bool bond_flow_dissect(struct bonding
*bond
, struct sk_buff
*skb
,
3153 struct flow_keys
*fk
)
3155 const struct ipv6hdr
*iph6
;
3156 const struct iphdr
*iph
;
3157 int noff
, proto
= -1;
3159 if (bond
->params
.xmit_policy
> BOND_XMIT_POLICY_LAYER23
)
3160 return skb_flow_dissect_flow_keys(skb
, fk
, 0);
3162 fk
->ports
.ports
= 0;
3163 noff
= skb_network_offset(skb
);
3164 if (skb
->protocol
== htons(ETH_P_IP
)) {
3165 if (unlikely(!pskb_may_pull(skb
, noff
+ sizeof(*iph
))))
3168 iph_to_flow_copy_v4addrs(fk
, iph
);
3169 noff
+= iph
->ihl
<< 2;
3170 if (!ip_is_fragment(iph
))
3171 proto
= iph
->protocol
;
3172 } else if (skb
->protocol
== htons(ETH_P_IPV6
)) {
3173 if (unlikely(!pskb_may_pull(skb
, noff
+ sizeof(*iph6
))))
3175 iph6
= ipv6_hdr(skb
);
3176 iph_to_flow_copy_v6addrs(fk
, iph6
);
3177 noff
+= sizeof(*iph6
);
3178 proto
= iph6
->nexthdr
;
3182 if (bond
->params
.xmit_policy
== BOND_XMIT_POLICY_LAYER34
&& proto
>= 0)
3183 fk
->ports
.ports
= skb_flow_get_ports(skb
, noff
, proto
);
3189 * bond_xmit_hash - generate a hash value based on the xmit policy
3190 * @bond: bonding device
3191 * @skb: buffer to use for headers
3193 * This function will extract the necessary headers from the skb buffer and use
3194 * them to generate a hash based on the xmit_policy set in the bonding device
3196 u32
bond_xmit_hash(struct bonding
*bond
, struct sk_buff
*skb
)
3198 struct flow_keys flow
;
3201 if (bond
->params
.xmit_policy
== BOND_XMIT_POLICY_ENCAP34
&&
3205 if (bond
->params
.xmit_policy
== BOND_XMIT_POLICY_LAYER2
||
3206 !bond_flow_dissect(bond
, skb
, &flow
))
3207 return bond_eth_hash(skb
);
3209 if (bond
->params
.xmit_policy
== BOND_XMIT_POLICY_LAYER23
||
3210 bond
->params
.xmit_policy
== BOND_XMIT_POLICY_ENCAP23
)
3211 hash
= bond_eth_hash(skb
);
3213 hash
= (__force u32
)flow
.ports
.ports
;
3214 hash
^= (__force u32
)flow_get_u32_dst(&flow
) ^
3215 (__force u32
)flow_get_u32_src(&flow
);
3216 hash
^= (hash
>> 16);
3217 hash
^= (hash
>> 8);
3222 /*-------------------------- Device entry points ----------------------------*/
3224 static void bond_work_init_all(struct bonding
*bond
)
3226 INIT_DELAYED_WORK(&bond
->mcast_work
,
3227 bond_resend_igmp_join_requests_delayed
);
3228 INIT_DELAYED_WORK(&bond
->alb_work
, bond_alb_monitor
);
3229 INIT_DELAYED_WORK(&bond
->mii_work
, bond_mii_monitor
);
3230 if (BOND_MODE(bond
) == BOND_MODE_ACTIVEBACKUP
)
3231 INIT_DELAYED_WORK(&bond
->arp_work
, bond_activebackup_arp_mon
);
3233 INIT_DELAYED_WORK(&bond
->arp_work
, bond_loadbalance_arp_mon
);
3234 INIT_DELAYED_WORK(&bond
->ad_work
, bond_3ad_state_machine_handler
);
3235 INIT_DELAYED_WORK(&bond
->slave_arr_work
, bond_slave_arr_handler
);
3238 static void bond_work_cancel_all(struct bonding
*bond
)
3240 cancel_delayed_work_sync(&bond
->mii_work
);
3241 cancel_delayed_work_sync(&bond
->arp_work
);
3242 cancel_delayed_work_sync(&bond
->alb_work
);
3243 cancel_delayed_work_sync(&bond
->ad_work
);
3244 cancel_delayed_work_sync(&bond
->mcast_work
);
3245 cancel_delayed_work_sync(&bond
->slave_arr_work
);
3248 static int bond_open(struct net_device
*bond_dev
)
3250 struct bonding
*bond
= netdev_priv(bond_dev
);
3251 struct list_head
*iter
;
3252 struct slave
*slave
;
3254 /* reset slave->backup and slave->inactive */
3255 if (bond_has_slaves(bond
)) {
3256 bond_for_each_slave(bond
, slave
, iter
) {
3257 if (bond_uses_primary(bond
) &&
3258 slave
!= rcu_access_pointer(bond
->curr_active_slave
)) {
3259 bond_set_slave_inactive_flags(slave
,
3260 BOND_SLAVE_NOTIFY_NOW
);
3261 } else if (BOND_MODE(bond
) != BOND_MODE_8023AD
) {
3262 bond_set_slave_active_flags(slave
,
3263 BOND_SLAVE_NOTIFY_NOW
);
3268 bond_work_init_all(bond
);
3270 if (bond_is_lb(bond
)) {
3271 /* bond_alb_initialize must be called before the timer
3274 if (bond_alb_initialize(bond
, (BOND_MODE(bond
) == BOND_MODE_ALB
)))
3276 if (bond
->params
.tlb_dynamic_lb
)
3277 queue_delayed_work(bond
->wq
, &bond
->alb_work
, 0);
3280 if (bond
->params
.miimon
) /* link check interval, in milliseconds. */
3281 queue_delayed_work(bond
->wq
, &bond
->mii_work
, 0);
3283 if (bond
->params
.arp_interval
) { /* arp interval, in milliseconds. */
3284 queue_delayed_work(bond
->wq
, &bond
->arp_work
, 0);
3285 bond
->recv_probe
= bond_arp_rcv
;
3288 if (BOND_MODE(bond
) == BOND_MODE_8023AD
) {
3289 queue_delayed_work(bond
->wq
, &bond
->ad_work
, 0);
3290 /* register to receive LACPDUs */
3291 bond
->recv_probe
= bond_3ad_lacpdu_recv
;
3292 bond_3ad_initiate_agg_selection(bond
, 1);
3295 if (bond_mode_uses_xmit_hash(bond
))
3296 bond_update_slave_arr(bond
, NULL
);
3301 static int bond_close(struct net_device
*bond_dev
)
3303 struct bonding
*bond
= netdev_priv(bond_dev
);
3305 bond_work_cancel_all(bond
);
3306 bond
->send_peer_notif
= 0;
3307 if (bond_is_lb(bond
))
3308 bond_alb_deinitialize(bond
);
3309 bond
->recv_probe
= NULL
;
3314 /* fold stats, assuming all rtnl_link_stats64 fields are u64, but
3315 * that some drivers can provide 32bit values only.
3317 static void bond_fold_stats(struct rtnl_link_stats64
*_res
,
3318 const struct rtnl_link_stats64
*_new
,
3319 const struct rtnl_link_stats64
*_old
)
3321 const u64
*new = (const u64
*)_new
;
3322 const u64
*old
= (const u64
*)_old
;
3323 u64
*res
= (u64
*)_res
;
3326 for (i
= 0; i
< sizeof(*_res
) / sizeof(u64
); i
++) {
3330 /* detects if this particular field is 32bit only */
3331 if (((nv
| ov
) >> 32) == 0)
3332 res
[i
] += (u32
)nv
- (u32
)ov
;
3338 static struct rtnl_link_stats64
*bond_get_stats(struct net_device
*bond_dev
,
3339 struct rtnl_link_stats64
*stats
)
3341 struct bonding
*bond
= netdev_priv(bond_dev
);
3342 struct rtnl_link_stats64 temp
;
3343 struct list_head
*iter
;
3344 struct slave
*slave
;
3346 spin_lock(&bond
->stats_lock
);
3347 memcpy(stats
, &bond
->bond_stats
, sizeof(*stats
));
3350 bond_for_each_slave_rcu(bond
, slave
, iter
) {
3351 const struct rtnl_link_stats64
*new =
3352 dev_get_stats(slave
->dev
, &temp
);
3354 bond_fold_stats(stats
, new, &slave
->slave_stats
);
3356 /* save off the slave stats for the next run */
3357 memcpy(&slave
->slave_stats
, new, sizeof(*new));
3361 memcpy(&bond
->bond_stats
, stats
, sizeof(*stats
));
3362 spin_unlock(&bond
->stats_lock
);
3367 static int bond_do_ioctl(struct net_device
*bond_dev
, struct ifreq
*ifr
, int cmd
)
3369 struct bonding
*bond
= netdev_priv(bond_dev
);
3370 struct net_device
*slave_dev
= NULL
;
3371 struct ifbond k_binfo
;
3372 struct ifbond __user
*u_binfo
= NULL
;
3373 struct ifslave k_sinfo
;
3374 struct ifslave __user
*u_sinfo
= NULL
;
3375 struct mii_ioctl_data
*mii
= NULL
;
3376 struct bond_opt_value newval
;
3380 netdev_dbg(bond_dev
, "bond_ioctl: cmd=%d\n", cmd
);
3391 /* We do this again just in case we were called by SIOCGMIIREG
3392 * instead of SIOCGMIIPHY.
3398 if (mii
->reg_num
== 1) {
3400 if (netif_carrier_ok(bond
->dev
))
3401 mii
->val_out
= BMSR_LSTATUS
;
3405 case BOND_INFO_QUERY_OLD
:
3406 case SIOCBONDINFOQUERY
:
3407 u_binfo
= (struct ifbond __user
*)ifr
->ifr_data
;
3409 if (copy_from_user(&k_binfo
, u_binfo
, sizeof(ifbond
)))
3412 res
= bond_info_query(bond_dev
, &k_binfo
);
3414 copy_to_user(u_binfo
, &k_binfo
, sizeof(ifbond
)))
3418 case BOND_SLAVE_INFO_QUERY_OLD
:
3419 case SIOCBONDSLAVEINFOQUERY
:
3420 u_sinfo
= (struct ifslave __user
*)ifr
->ifr_data
;
3422 if (copy_from_user(&k_sinfo
, u_sinfo
, sizeof(ifslave
)))
3425 res
= bond_slave_info_query(bond_dev
, &k_sinfo
);
3427 copy_to_user(u_sinfo
, &k_sinfo
, sizeof(ifslave
)))
3435 net
= dev_net(bond_dev
);
3437 if (!ns_capable(net
->user_ns
, CAP_NET_ADMIN
))
3440 slave_dev
= __dev_get_by_name(net
, ifr
->ifr_slave
);
3442 netdev_dbg(bond_dev
, "slave_dev=%p:\n", slave_dev
);
3447 netdev_dbg(bond_dev
, "slave_dev->name=%s:\n", slave_dev
->name
);
3449 case BOND_ENSLAVE_OLD
:
3450 case SIOCBONDENSLAVE
:
3451 res
= bond_enslave(bond_dev
, slave_dev
);
3453 case BOND_RELEASE_OLD
:
3454 case SIOCBONDRELEASE
:
3455 res
= bond_release(bond_dev
, slave_dev
);
3457 case BOND_SETHWADDR_OLD
:
3458 case SIOCBONDSETHWADDR
:
3459 bond_set_dev_addr(bond_dev
, slave_dev
);
3462 case BOND_CHANGE_ACTIVE_OLD
:
3463 case SIOCBONDCHANGEACTIVE
:
3464 bond_opt_initstr(&newval
, slave_dev
->name
);
3465 res
= __bond_opt_set(bond
, BOND_OPT_ACTIVE_SLAVE
, &newval
);
3474 static void bond_change_rx_flags(struct net_device
*bond_dev
, int change
)
3476 struct bonding
*bond
= netdev_priv(bond_dev
);
3478 if (change
& IFF_PROMISC
)
3479 bond_set_promiscuity(bond
,
3480 bond_dev
->flags
& IFF_PROMISC
? 1 : -1);
3482 if (change
& IFF_ALLMULTI
)
3483 bond_set_allmulti(bond
,
3484 bond_dev
->flags
& IFF_ALLMULTI
? 1 : -1);
3487 static void bond_set_rx_mode(struct net_device
*bond_dev
)
3489 struct bonding
*bond
= netdev_priv(bond_dev
);
3490 struct list_head
*iter
;
3491 struct slave
*slave
;
3494 if (bond_uses_primary(bond
)) {
3495 slave
= rcu_dereference(bond
->curr_active_slave
);
3497 dev_uc_sync(slave
->dev
, bond_dev
);
3498 dev_mc_sync(slave
->dev
, bond_dev
);
3501 bond_for_each_slave_rcu(bond
, slave
, iter
) {
3502 dev_uc_sync_multiple(slave
->dev
, bond_dev
);
3503 dev_mc_sync_multiple(slave
->dev
, bond_dev
);
3509 static int bond_neigh_init(struct neighbour
*n
)
3511 struct bonding
*bond
= netdev_priv(n
->dev
);
3512 const struct net_device_ops
*slave_ops
;
3513 struct neigh_parms parms
;
3514 struct slave
*slave
;
3517 slave
= bond_first_slave(bond
);
3520 slave_ops
= slave
->dev
->netdev_ops
;
3521 if (!slave_ops
->ndo_neigh_setup
)
3524 parms
.neigh_setup
= NULL
;
3525 parms
.neigh_cleanup
= NULL
;
3526 ret
= slave_ops
->ndo_neigh_setup(slave
->dev
, &parms
);
3530 /* Assign slave's neigh_cleanup to neighbour in case cleanup is called
3531 * after the last slave has been detached. Assumes that all slaves
3532 * utilize the same neigh_cleanup (true at this writing as only user
3535 n
->parms
->neigh_cleanup
= parms
.neigh_cleanup
;
3537 if (!parms
.neigh_setup
)
3540 return parms
.neigh_setup(n
);
3543 /* The bonding ndo_neigh_setup is called at init time beofre any
3544 * slave exists. So we must declare proxy setup function which will
3545 * be used at run time to resolve the actual slave neigh param setup.
3547 * It's also called by master devices (such as vlans) to setup their
3548 * underlying devices. In that case - do nothing, we're already set up from
3551 static int bond_neigh_setup(struct net_device
*dev
,
3552 struct neigh_parms
*parms
)
3554 /* modify only our neigh_parms */
3555 if (parms
->dev
== dev
)
3556 parms
->neigh_setup
= bond_neigh_init
;
3561 /* Change the MTU of all of a master's slaves to match the master */
3562 static int bond_change_mtu(struct net_device
*bond_dev
, int new_mtu
)
3564 struct bonding
*bond
= netdev_priv(bond_dev
);
3565 struct slave
*slave
, *rollback_slave
;
3566 struct list_head
*iter
;
3569 netdev_dbg(bond_dev
, "bond=%p, new_mtu=%d\n", bond
, new_mtu
);
3571 bond_for_each_slave(bond
, slave
, iter
) {
3572 netdev_dbg(bond_dev
, "s %p c_m %p\n",
3573 slave
, slave
->dev
->netdev_ops
->ndo_change_mtu
);
3575 res
= dev_set_mtu(slave
->dev
, new_mtu
);
3578 /* If we failed to set the slave's mtu to the new value
3579 * we must abort the operation even in ACTIVE_BACKUP
3580 * mode, because if we allow the backup slaves to have
3581 * different mtu values than the active slave we'll
3582 * need to change their mtu when doing a failover. That
3583 * means changing their mtu from timer context, which
3584 * is probably not a good idea.
3586 netdev_dbg(bond_dev
, "err %d %s\n", res
,
3592 bond_dev
->mtu
= new_mtu
;
3597 /* unwind from head to the slave that failed */
3598 bond_for_each_slave(bond
, rollback_slave
, iter
) {
3601 if (rollback_slave
== slave
)
3604 tmp_res
= dev_set_mtu(rollback_slave
->dev
, bond_dev
->mtu
);
3606 netdev_dbg(bond_dev
, "unwind err %d dev %s\n",
3607 tmp_res
, rollback_slave
->dev
->name
);
3614 /* Change HW address
3616 * Note that many devices must be down to change the HW address, and
3617 * downing the master releases all slaves. We can make bonds full of
3618 * bonding devices to test this, however.
3620 static int bond_set_mac_address(struct net_device
*bond_dev
, void *addr
)
3622 struct bonding
*bond
= netdev_priv(bond_dev
);
3623 struct slave
*slave
, *rollback_slave
;
3624 struct sockaddr
*sa
= addr
, tmp_sa
;
3625 struct list_head
*iter
;
3628 if (BOND_MODE(bond
) == BOND_MODE_ALB
)
3629 return bond_alb_set_mac_address(bond_dev
, addr
);
3632 netdev_dbg(bond_dev
, "bond=%p\n", bond
);
3634 /* If fail_over_mac is enabled, do nothing and return success.
3635 * Returning an error causes ifenslave to fail.
3637 if (bond
->params
.fail_over_mac
&&
3638 BOND_MODE(bond
) == BOND_MODE_ACTIVEBACKUP
)
3641 if (!is_valid_ether_addr(sa
->sa_data
))
3642 return -EADDRNOTAVAIL
;
3644 bond_for_each_slave(bond
, slave
, iter
) {
3645 netdev_dbg(bond_dev
, "slave %p %s\n", slave
, slave
->dev
->name
);
3646 res
= dev_set_mac_address(slave
->dev
, addr
);
3648 /* TODO: consider downing the slave
3650 * User should expect communications
3651 * breakage anyway until ARP finish
3654 netdev_dbg(bond_dev
, "err %d %s\n", res
, slave
->dev
->name
);
3660 memcpy(bond_dev
->dev_addr
, sa
->sa_data
, bond_dev
->addr_len
);
3664 memcpy(tmp_sa
.sa_data
, bond_dev
->dev_addr
, bond_dev
->addr_len
);
3665 tmp_sa
.sa_family
= bond_dev
->type
;
3667 /* unwind from head to the slave that failed */
3668 bond_for_each_slave(bond
, rollback_slave
, iter
) {
3671 if (rollback_slave
== slave
)
3674 tmp_res
= dev_set_mac_address(rollback_slave
->dev
, &tmp_sa
);
3676 netdev_dbg(bond_dev
, "unwind err %d dev %s\n",
3677 tmp_res
, rollback_slave
->dev
->name
);
3685 * bond_xmit_slave_id - transmit skb through slave with slave_id
3686 * @bond: bonding device that is transmitting
3687 * @skb: buffer to transmit
3688 * @slave_id: slave id up to slave_cnt-1 through which to transmit
3690 * This function tries to transmit through slave with slave_id but in case
3691 * it fails, it tries to find the first available slave for transmission.
3692 * The skb is consumed in all cases, thus the function is void.
3694 static void bond_xmit_slave_id(struct bonding
*bond
, struct sk_buff
*skb
, int slave_id
)
3696 struct list_head
*iter
;
3697 struct slave
*slave
;
3700 /* Here we start from the slave with slave_id */
3701 bond_for_each_slave_rcu(bond
, slave
, iter
) {
3703 if (bond_slave_can_tx(slave
)) {
3704 bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
3710 /* Here we start from the first slave up to slave_id */
3712 bond_for_each_slave_rcu(bond
, slave
, iter
) {
3715 if (bond_slave_can_tx(slave
)) {
3716 bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
3720 /* no slave that can tx has been found */
3721 bond_tx_drop(bond
->dev
, skb
);
3725 * bond_rr_gen_slave_id - generate slave id based on packets_per_slave
3726 * @bond: bonding device to use
3728 * Based on the value of the bonding device's packets_per_slave parameter
3729 * this function generates a slave id, which is usually used as the next
3730 * slave to transmit through.
3732 static u32
bond_rr_gen_slave_id(struct bonding
*bond
)
3735 struct reciprocal_value reciprocal_packets_per_slave
;
3736 int packets_per_slave
= bond
->params
.packets_per_slave
;
3738 switch (packets_per_slave
) {
3740 slave_id
= prandom_u32();
3743 slave_id
= bond
->rr_tx_counter
;
3746 reciprocal_packets_per_slave
=
3747 bond
->params
.reciprocal_packets_per_slave
;
3748 slave_id
= reciprocal_divide(bond
->rr_tx_counter
,
3749 reciprocal_packets_per_slave
);
3752 bond
->rr_tx_counter
++;
3757 static int bond_xmit_roundrobin(struct sk_buff
*skb
, struct net_device
*bond_dev
)
3759 struct bonding
*bond
= netdev_priv(bond_dev
);
3760 struct iphdr
*iph
= ip_hdr(skb
);
3761 struct slave
*slave
;
3764 /* Start with the curr_active_slave that joined the bond as the
3765 * default for sending IGMP traffic. For failover purposes one
3766 * needs to maintain some consistency for the interface that will
3767 * send the join/membership reports. The curr_active_slave found
3768 * will send all of this type of traffic.
3770 if (iph
->protocol
== IPPROTO_IGMP
&& skb
->protocol
== htons(ETH_P_IP
)) {
3771 slave
= rcu_dereference(bond
->curr_active_slave
);
3773 bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
3775 bond_xmit_slave_id(bond
, skb
, 0);
3777 int slave_cnt
= ACCESS_ONCE(bond
->slave_cnt
);
3779 if (likely(slave_cnt
)) {
3780 slave_id
= bond_rr_gen_slave_id(bond
);
3781 bond_xmit_slave_id(bond
, skb
, slave_id
% slave_cnt
);
3783 bond_tx_drop(bond_dev
, skb
);
3787 return NETDEV_TX_OK
;
3790 /* In active-backup mode, we know that bond->curr_active_slave is always valid if
3791 * the bond has a usable interface.
3793 static int bond_xmit_activebackup(struct sk_buff
*skb
, struct net_device
*bond_dev
)
3795 struct bonding
*bond
= netdev_priv(bond_dev
);
3796 struct slave
*slave
;
3798 slave
= rcu_dereference(bond
->curr_active_slave
);
3800 bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
3802 bond_tx_drop(bond_dev
, skb
);
3804 return NETDEV_TX_OK
;
3807 /* Use this to update slave_array when (a) it's not appropriate to update
3808 * slave_array right away (note that update_slave_array() may sleep)
3809 * and / or (b) RTNL is not held.
3811 void bond_slave_arr_work_rearm(struct bonding
*bond
, unsigned long delay
)
3813 queue_delayed_work(bond
->wq
, &bond
->slave_arr_work
, delay
);
3816 /* Slave array work handler. Holds only RTNL */
3817 static void bond_slave_arr_handler(struct work_struct
*work
)
3819 struct bonding
*bond
= container_of(work
, struct bonding
,
3820 slave_arr_work
.work
);
3823 if (!rtnl_trylock())
3826 ret
= bond_update_slave_arr(bond
, NULL
);
3829 pr_warn_ratelimited("Failed to update slave array from WT\n");
3835 bond_slave_arr_work_rearm(bond
, 1);
3838 /* Build the usable slaves array in control path for modes that use xmit-hash
3839 * to determine the slave interface -
3840 * (a) BOND_MODE_8023AD
3842 * (c) BOND_MODE_TLB && tlb_dynamic_lb == 0
3844 * The caller is expected to hold RTNL only and NO other lock!
3846 int bond_update_slave_arr(struct bonding
*bond
, struct slave
*skipslave
)
3848 struct slave
*slave
;
3849 struct list_head
*iter
;
3850 struct bond_up_slave
*new_arr
, *old_arr
;
3854 #ifdef CONFIG_LOCKDEP
3855 WARN_ON(lockdep_is_held(&bond
->mode_lock
));
3858 new_arr
= kzalloc(offsetof(struct bond_up_slave
, arr
[bond
->slave_cnt
]),
3862 pr_err("Failed to build slave-array.\n");
3865 if (BOND_MODE(bond
) == BOND_MODE_8023AD
) {
3866 struct ad_info ad_info
;
3868 if (bond_3ad_get_active_agg_info(bond
, &ad_info
)) {
3869 pr_debug("bond_3ad_get_active_agg_info failed\n");
3870 kfree_rcu(new_arr
, rcu
);
3871 /* No active aggragator means it's not safe to use
3872 * the previous array.
3874 old_arr
= rtnl_dereference(bond
->slave_arr
);
3876 RCU_INIT_POINTER(bond
->slave_arr
, NULL
);
3877 kfree_rcu(old_arr
, rcu
);
3881 agg_id
= ad_info
.aggregator_id
;
3883 bond_for_each_slave(bond
, slave
, iter
) {
3884 if (BOND_MODE(bond
) == BOND_MODE_8023AD
) {
3885 struct aggregator
*agg
;
3887 agg
= SLAVE_AD_INFO(slave
)->port
.aggregator
;
3888 if (!agg
|| agg
->aggregator_identifier
!= agg_id
)
3891 if (!bond_slave_can_tx(slave
))
3893 if (skipslave
== slave
)
3895 new_arr
->arr
[new_arr
->count
++] = slave
;
3898 old_arr
= rtnl_dereference(bond
->slave_arr
);
3899 rcu_assign_pointer(bond
->slave_arr
, new_arr
);
3901 kfree_rcu(old_arr
, rcu
);
3903 if (ret
!= 0 && skipslave
) {
3906 /* Rare situation where caller has asked to skip a specific
3907 * slave but allocation failed (most likely!). BTW this is
3908 * only possible when the call is initiated from
3909 * __bond_release_one(). In this situation; overwrite the
3910 * skipslave entry in the array with the last entry from the
3911 * array to avoid a situation where the xmit path may choose
3912 * this to-be-skipped slave to send a packet out.
3914 old_arr
= rtnl_dereference(bond
->slave_arr
);
3915 for (idx
= 0; idx
< old_arr
->count
; idx
++) {
3916 if (skipslave
== old_arr
->arr
[idx
]) {
3918 old_arr
->arr
[old_arr
->count
-1];
3927 /* Use this Xmit function for 3AD as well as XOR modes. The current
3928 * usable slave array is formed in the control path. The xmit function
3929 * just calculates hash and sends the packet out.
3931 static int bond_3ad_xor_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
3933 struct bonding
*bond
= netdev_priv(dev
);
3934 struct slave
*slave
;
3935 struct bond_up_slave
*slaves
;
3938 slaves
= rcu_dereference(bond
->slave_arr
);
3939 count
= slaves
? ACCESS_ONCE(slaves
->count
) : 0;
3940 if (likely(count
)) {
3941 slave
= slaves
->arr
[bond_xmit_hash(bond
, skb
) % count
];
3942 bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
3944 bond_tx_drop(dev
, skb
);
3947 return NETDEV_TX_OK
;
3950 /* in broadcast mode, we send everything to all usable interfaces. */
3951 static int bond_xmit_broadcast(struct sk_buff
*skb
, struct net_device
*bond_dev
)
3953 struct bonding
*bond
= netdev_priv(bond_dev
);
3954 struct slave
*slave
= NULL
;
3955 struct list_head
*iter
;
3957 bond_for_each_slave_rcu(bond
, slave
, iter
) {
3958 if (bond_is_last_slave(bond
, slave
))
3960 if (bond_slave_is_up(slave
) && slave
->link
== BOND_LINK_UP
) {
3961 struct sk_buff
*skb2
= skb_clone(skb
, GFP_ATOMIC
);
3964 net_err_ratelimited("%s: Error: %s: skb_clone() failed\n",
3965 bond_dev
->name
, __func__
);
3968 bond_dev_queue_xmit(bond
, skb2
, slave
->dev
);
3971 if (slave
&& bond_slave_is_up(slave
) && slave
->link
== BOND_LINK_UP
)
3972 bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
3974 bond_tx_drop(bond_dev
, skb
);
3976 return NETDEV_TX_OK
;
3979 /*------------------------- Device initialization ---------------------------*/
3981 /* Lookup the slave that corresponds to a qid */
3982 static inline int bond_slave_override(struct bonding
*bond
,
3983 struct sk_buff
*skb
)
3985 struct slave
*slave
= NULL
;
3986 struct list_head
*iter
;
3988 if (!skb
->queue_mapping
)
3991 /* Find out if any slaves have the same mapping as this skb. */
3992 bond_for_each_slave_rcu(bond
, slave
, iter
) {
3993 if (slave
->queue_id
== skb
->queue_mapping
) {
3994 if (bond_slave_is_up(slave
) &&
3995 slave
->link
== BOND_LINK_UP
) {
3996 bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
3999 /* If the slave isn't UP, use default transmit policy. */
4008 static u16
bond_select_queue(struct net_device
*dev
, struct sk_buff
*skb
,
4009 void *accel_priv
, select_queue_fallback_t fallback
)
4011 /* This helper function exists to help dev_pick_tx get the correct
4012 * destination queue. Using a helper function skips a call to
4013 * skb_tx_hash and will put the skbs in the queue we expect on their
4014 * way down to the bonding driver.
4016 u16 txq
= skb_rx_queue_recorded(skb
) ? skb_get_rx_queue(skb
) : 0;
4018 /* Save the original txq to restore before passing to the driver */
4019 qdisc_skb_cb(skb
)->slave_dev_queue_mapping
= skb
->queue_mapping
;
4021 if (unlikely(txq
>= dev
->real_num_tx_queues
)) {
4023 txq
-= dev
->real_num_tx_queues
;
4024 } while (txq
>= dev
->real_num_tx_queues
);
4029 static netdev_tx_t
__bond_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
4031 struct bonding
*bond
= netdev_priv(dev
);
4033 if (bond_should_override_tx_queue(bond
) &&
4034 !bond_slave_override(bond
, skb
))
4035 return NETDEV_TX_OK
;
4037 switch (BOND_MODE(bond
)) {
4038 case BOND_MODE_ROUNDROBIN
:
4039 return bond_xmit_roundrobin(skb
, dev
);
4040 case BOND_MODE_ACTIVEBACKUP
:
4041 return bond_xmit_activebackup(skb
, dev
);
4042 case BOND_MODE_8023AD
:
4044 return bond_3ad_xor_xmit(skb
, dev
);
4045 case BOND_MODE_BROADCAST
:
4046 return bond_xmit_broadcast(skb
, dev
);
4048 return bond_alb_xmit(skb
, dev
);
4050 return bond_tlb_xmit(skb
, dev
);
4052 /* Should never happen, mode already checked */
4053 netdev_err(dev
, "Unknown bonding mode %d\n", BOND_MODE(bond
));
4055 bond_tx_drop(dev
, skb
);
4056 return NETDEV_TX_OK
;
4060 static netdev_tx_t
bond_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
4062 struct bonding
*bond
= netdev_priv(dev
);
4063 netdev_tx_t ret
= NETDEV_TX_OK
;
4065 /* If we risk deadlock from transmitting this in the
4066 * netpoll path, tell netpoll to queue the frame for later tx
4068 if (unlikely(is_netpoll_tx_blocked(dev
)))
4069 return NETDEV_TX_BUSY
;
4072 if (bond_has_slaves(bond
))
4073 ret
= __bond_start_xmit(skb
, dev
);
4075 bond_tx_drop(dev
, skb
);
4081 static int bond_ethtool_get_settings(struct net_device
*bond_dev
,
4082 struct ethtool_cmd
*ecmd
)
4084 struct bonding
*bond
= netdev_priv(bond_dev
);
4085 unsigned long speed
= 0;
4086 struct list_head
*iter
;
4087 struct slave
*slave
;
4089 ecmd
->duplex
= DUPLEX_UNKNOWN
;
4090 ecmd
->port
= PORT_OTHER
;
4092 /* Since bond_slave_can_tx returns false for all inactive or down slaves, we
4093 * do not need to check mode. Though link speed might not represent
4094 * the true receive or transmit bandwidth (not all modes are symmetric)
4095 * this is an accurate maximum.
4097 bond_for_each_slave(bond
, slave
, iter
) {
4098 if (bond_slave_can_tx(slave
)) {
4099 if (slave
->speed
!= SPEED_UNKNOWN
)
4100 speed
+= slave
->speed
;
4101 if (ecmd
->duplex
== DUPLEX_UNKNOWN
&&
4102 slave
->duplex
!= DUPLEX_UNKNOWN
)
4103 ecmd
->duplex
= slave
->duplex
;
4106 ethtool_cmd_speed_set(ecmd
, speed
? : SPEED_UNKNOWN
);
4111 static void bond_ethtool_get_drvinfo(struct net_device
*bond_dev
,
4112 struct ethtool_drvinfo
*drvinfo
)
4114 strlcpy(drvinfo
->driver
, DRV_NAME
, sizeof(drvinfo
->driver
));
4115 strlcpy(drvinfo
->version
, DRV_VERSION
, sizeof(drvinfo
->version
));
4116 snprintf(drvinfo
->fw_version
, sizeof(drvinfo
->fw_version
), "%d",
4120 static const struct ethtool_ops bond_ethtool_ops
= {
4121 .get_drvinfo
= bond_ethtool_get_drvinfo
,
4122 .get_settings
= bond_ethtool_get_settings
,
4123 .get_link
= ethtool_op_get_link
,
4126 static const struct net_device_ops bond_netdev_ops
= {
4127 .ndo_init
= bond_init
,
4128 .ndo_uninit
= bond_uninit
,
4129 .ndo_open
= bond_open
,
4130 .ndo_stop
= bond_close
,
4131 .ndo_start_xmit
= bond_start_xmit
,
4132 .ndo_select_queue
= bond_select_queue
,
4133 .ndo_get_stats64
= bond_get_stats
,
4134 .ndo_do_ioctl
= bond_do_ioctl
,
4135 .ndo_change_rx_flags
= bond_change_rx_flags
,
4136 .ndo_set_rx_mode
= bond_set_rx_mode
,
4137 .ndo_change_mtu
= bond_change_mtu
,
4138 .ndo_set_mac_address
= bond_set_mac_address
,
4139 .ndo_neigh_setup
= bond_neigh_setup
,
4140 .ndo_vlan_rx_add_vid
= bond_vlan_rx_add_vid
,
4141 .ndo_vlan_rx_kill_vid
= bond_vlan_rx_kill_vid
,
4142 #ifdef CONFIG_NET_POLL_CONTROLLER
4143 .ndo_netpoll_setup
= bond_netpoll_setup
,
4144 .ndo_netpoll_cleanup
= bond_netpoll_cleanup
,
4145 .ndo_poll_controller
= bond_poll_controller
,
4147 .ndo_add_slave
= bond_enslave
,
4148 .ndo_del_slave
= bond_release
,
4149 .ndo_fix_features
= bond_fix_features
,
4150 .ndo_neigh_construct
= netdev_default_l2upper_neigh_construct
,
4151 .ndo_neigh_destroy
= netdev_default_l2upper_neigh_destroy
,
4152 .ndo_bridge_setlink
= switchdev_port_bridge_setlink
,
4153 .ndo_bridge_getlink
= switchdev_port_bridge_getlink
,
4154 .ndo_bridge_dellink
= switchdev_port_bridge_dellink
,
4155 .ndo_fdb_add
= switchdev_port_fdb_add
,
4156 .ndo_fdb_del
= switchdev_port_fdb_del
,
4157 .ndo_fdb_dump
= switchdev_port_fdb_dump
,
4158 .ndo_features_check
= passthru_features_check
,
4161 static const struct device_type bond_type
= {
4165 static void bond_destructor(struct net_device
*bond_dev
)
4167 struct bonding
*bond
= netdev_priv(bond_dev
);
4169 destroy_workqueue(bond
->wq
);
4170 free_netdev(bond_dev
);
4173 void bond_setup(struct net_device
*bond_dev
)
4175 struct bonding
*bond
= netdev_priv(bond_dev
);
4177 spin_lock_init(&bond
->mode_lock
);
4178 spin_lock_init(&bond
->stats_lock
);
4179 bond
->params
= bonding_defaults
;
4181 /* Initialize pointers */
4182 bond
->dev
= bond_dev
;
4184 /* Initialize the device entry points */
4185 ether_setup(bond_dev
);
4186 bond_dev
->netdev_ops
= &bond_netdev_ops
;
4187 bond_dev
->ethtool_ops
= &bond_ethtool_ops
;
4189 bond_dev
->destructor
= bond_destructor
;
4191 SET_NETDEV_DEVTYPE(bond_dev
, &bond_type
);
4193 /* Initialize the device options */
4194 bond_dev
->flags
|= IFF_MASTER
;
4195 bond_dev
->priv_flags
|= IFF_BONDING
| IFF_UNICAST_FLT
| IFF_NO_QUEUE
;
4196 bond_dev
->priv_flags
&= ~(IFF_XMIT_DST_RELEASE
| IFF_TX_SKB_SHARING
);
4198 /* don't acquire bond device's netif_tx_lock when transmitting */
4199 bond_dev
->features
|= NETIF_F_LLTX
;
4201 /* By default, we declare the bond to be fully
4202 * VLAN hardware accelerated capable. Special
4203 * care is taken in the various xmit functions
4204 * when there are slaves that are not hw accel
4208 /* Don't allow bond devices to change network namespaces. */
4209 bond_dev
->features
|= NETIF_F_NETNS_LOCAL
;
4211 bond_dev
->hw_features
= BOND_VLAN_FEATURES
|
4212 NETIF_F_HW_VLAN_CTAG_TX
|
4213 NETIF_F_HW_VLAN_CTAG_RX
|
4214 NETIF_F_HW_VLAN_CTAG_FILTER
;
4216 bond_dev
->hw_features
|= NETIF_F_GSO_ENCAP_ALL
;
4217 bond_dev
->features
|= bond_dev
->hw_features
;
4220 /* Destroy a bonding device.
4221 * Must be under rtnl_lock when this function is called.
4223 static void bond_uninit(struct net_device
*bond_dev
)
4225 struct bonding
*bond
= netdev_priv(bond_dev
);
4226 struct list_head
*iter
;
4227 struct slave
*slave
;
4228 struct bond_up_slave
*arr
;
4230 bond_netpoll_cleanup(bond_dev
);
4232 /* Release the bonded slaves */
4233 bond_for_each_slave(bond
, slave
, iter
)
4234 __bond_release_one(bond_dev
, slave
->dev
, true);
4235 netdev_info(bond_dev
, "Released all slaves\n");
4237 arr
= rtnl_dereference(bond
->slave_arr
);
4239 RCU_INIT_POINTER(bond
->slave_arr
, NULL
);
4240 kfree_rcu(arr
, rcu
);
4243 list_del(&bond
->bond_list
);
4245 bond_debug_unregister(bond
);
4248 /*------------------------- Module initialization ---------------------------*/
4250 static int bond_check_params(struct bond_params
*params
)
4252 int arp_validate_value
, fail_over_mac_value
, primary_reselect_value
, i
;
4253 struct bond_opt_value newval
;
4254 const struct bond_opt_value
*valptr
;
4255 int arp_all_targets_value
;
4256 u16 ad_actor_sys_prio
= 0;
4257 u16 ad_user_port_key
= 0;
4259 /* Convert string parameters. */
4261 bond_opt_initstr(&newval
, mode
);
4262 valptr
= bond_opt_parse(bond_opt_get(BOND_OPT_MODE
), &newval
);
4264 pr_err("Error: Invalid bonding mode \"%s\"\n", mode
);
4267 bond_mode
= valptr
->value
;
4270 if (xmit_hash_policy
) {
4271 if ((bond_mode
!= BOND_MODE_XOR
) &&
4272 (bond_mode
!= BOND_MODE_8023AD
) &&
4273 (bond_mode
!= BOND_MODE_TLB
)) {
4274 pr_info("xmit_hash_policy param is irrelevant in mode %s\n",
4275 bond_mode_name(bond_mode
));
4277 bond_opt_initstr(&newval
, xmit_hash_policy
);
4278 valptr
= bond_opt_parse(bond_opt_get(BOND_OPT_XMIT_HASH
),
4281 pr_err("Error: Invalid xmit_hash_policy \"%s\"\n",
4285 xmit_hashtype
= valptr
->value
;
4290 if (bond_mode
!= BOND_MODE_8023AD
) {
4291 pr_info("lacp_rate param is irrelevant in mode %s\n",
4292 bond_mode_name(bond_mode
));
4294 bond_opt_initstr(&newval
, lacp_rate
);
4295 valptr
= bond_opt_parse(bond_opt_get(BOND_OPT_LACP_RATE
),
4298 pr_err("Error: Invalid lacp rate \"%s\"\n",
4302 lacp_fast
= valptr
->value
;
4307 bond_opt_initstr(&newval
, ad_select
);
4308 valptr
= bond_opt_parse(bond_opt_get(BOND_OPT_AD_SELECT
),
4311 pr_err("Error: Invalid ad_select \"%s\"\n", ad_select
);
4314 params
->ad_select
= valptr
->value
;
4315 if (bond_mode
!= BOND_MODE_8023AD
)
4316 pr_warn("ad_select param only affects 802.3ad mode\n");
4318 params
->ad_select
= BOND_AD_STABLE
;
4321 if (max_bonds
< 0) {
4322 pr_warn("Warning: max_bonds (%d) not in range %d-%d, so it was reset to BOND_DEFAULT_MAX_BONDS (%d)\n",
4323 max_bonds
, 0, INT_MAX
, BOND_DEFAULT_MAX_BONDS
);
4324 max_bonds
= BOND_DEFAULT_MAX_BONDS
;
4328 pr_warn("Warning: miimon module parameter (%d), not in range 0-%d, so it was reset to 0\n",
4334 pr_warn("Warning: updelay module parameter (%d), not in range 0-%d, so it was reset to 0\n",
4339 if (downdelay
< 0) {
4340 pr_warn("Warning: downdelay module parameter (%d), not in range 0-%d, so it was reset to 0\n",
4341 downdelay
, INT_MAX
);
4345 if ((use_carrier
!= 0) && (use_carrier
!= 1)) {
4346 pr_warn("Warning: use_carrier module parameter (%d), not of valid value (0/1), so it was set to 1\n",
4351 if (num_peer_notif
< 0 || num_peer_notif
> 255) {
4352 pr_warn("Warning: num_grat_arp/num_unsol_na (%d) not in range 0-255 so it was reset to 1\n",
4357 /* reset values for 802.3ad/TLB/ALB */
4358 if (!bond_mode_uses_arp(bond_mode
)) {
4360 pr_warn("Warning: miimon must be specified, otherwise bonding will not detect link failure, speed and duplex which are essential for 802.3ad operation\n");
4361 pr_warn("Forcing miimon to 100msec\n");
4362 miimon
= BOND_DEFAULT_MIIMON
;
4366 if (tx_queues
< 1 || tx_queues
> 255) {
4367 pr_warn("Warning: tx_queues (%d) should be between 1 and 255, resetting to %d\n",
4368 tx_queues
, BOND_DEFAULT_TX_QUEUES
);
4369 tx_queues
= BOND_DEFAULT_TX_QUEUES
;
4372 if ((all_slaves_active
!= 0) && (all_slaves_active
!= 1)) {
4373 pr_warn("Warning: all_slaves_active module parameter (%d), not of valid value (0/1), so it was set to 0\n",
4375 all_slaves_active
= 0;
4378 if (resend_igmp
< 0 || resend_igmp
> 255) {
4379 pr_warn("Warning: resend_igmp (%d) should be between 0 and 255, resetting to %d\n",
4380 resend_igmp
, BOND_DEFAULT_RESEND_IGMP
);
4381 resend_igmp
= BOND_DEFAULT_RESEND_IGMP
;
4384 bond_opt_initval(&newval
, packets_per_slave
);
4385 if (!bond_opt_parse(bond_opt_get(BOND_OPT_PACKETS_PER_SLAVE
), &newval
)) {
4386 pr_warn("Warning: packets_per_slave (%d) should be between 0 and %u resetting to 1\n",
4387 packets_per_slave
, USHRT_MAX
);
4388 packets_per_slave
= 1;
4391 if (bond_mode
== BOND_MODE_ALB
) {
4392 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",
4397 if (updelay
|| downdelay
) {
4398 /* just warn the user the up/down delay will have
4399 * no effect since miimon is zero...
4401 pr_warn("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",
4402 updelay
, downdelay
);
4405 /* don't allow arp monitoring */
4407 pr_warn("Warning: miimon (%d) and arp_interval (%d) can't be used simultaneously, disabling ARP monitoring\n",
4408 miimon
, arp_interval
);
4412 if ((updelay
% miimon
) != 0) {
4413 pr_warn("Warning: updelay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
4414 updelay
, miimon
, (updelay
/ miimon
) * miimon
);
4419 if ((downdelay
% miimon
) != 0) {
4420 pr_warn("Warning: downdelay (%d) is not a multiple of miimon (%d), downdelay rounded to %d ms\n",
4422 (downdelay
/ miimon
) * miimon
);
4425 downdelay
/= miimon
;
4428 if (arp_interval
< 0) {
4429 pr_warn("Warning: arp_interval module parameter (%d), not in range 0-%d, so it was reset to 0\n",
4430 arp_interval
, INT_MAX
);
4434 for (arp_ip_count
= 0, i
= 0;
4435 (arp_ip_count
< BOND_MAX_ARP_TARGETS
) && arp_ip_target
[i
]; i
++) {
4438 /* not a complete check, but good enough to catch mistakes */
4439 if (!in4_pton(arp_ip_target
[i
], -1, (u8
*)&ip
, -1, NULL
) ||
4440 !bond_is_ip_target_ok(ip
)) {
4441 pr_warn("Warning: bad arp_ip_target module parameter (%s), ARP monitoring will not be performed\n",
4445 if (bond_get_targets_ip(arp_target
, ip
) == -1)
4446 arp_target
[arp_ip_count
++] = ip
;
4448 pr_warn("Warning: duplicate address %pI4 in arp_ip_target, skipping\n",
4453 if (arp_interval
&& !arp_ip_count
) {
4454 /* don't allow arping if no arp_ip_target given... */
4455 pr_warn("Warning: arp_interval module parameter (%d) specified without providing an arp_ip_target parameter, arp_interval was reset to 0\n",
4461 if (!arp_interval
) {
4462 pr_err("arp_validate requires arp_interval\n");
4466 bond_opt_initstr(&newval
, arp_validate
);
4467 valptr
= bond_opt_parse(bond_opt_get(BOND_OPT_ARP_VALIDATE
),
4470 pr_err("Error: invalid arp_validate \"%s\"\n",
4474 arp_validate_value
= valptr
->value
;
4476 arp_validate_value
= 0;
4479 arp_all_targets_value
= 0;
4480 if (arp_all_targets
) {
4481 bond_opt_initstr(&newval
, arp_all_targets
);
4482 valptr
= bond_opt_parse(bond_opt_get(BOND_OPT_ARP_ALL_TARGETS
),
4485 pr_err("Error: invalid arp_all_targets_value \"%s\"\n",
4487 arp_all_targets_value
= 0;
4489 arp_all_targets_value
= valptr
->value
;
4494 pr_info("MII link monitoring set to %d ms\n", miimon
);
4495 } else if (arp_interval
) {
4496 valptr
= bond_opt_get_val(BOND_OPT_ARP_VALIDATE
,
4497 arp_validate_value
);
4498 pr_info("ARP monitoring set to %d ms, validate %s, with %d target(s):",
4499 arp_interval
, valptr
->string
, arp_ip_count
);
4501 for (i
= 0; i
< arp_ip_count
; i
++)
4502 pr_cont(" %s", arp_ip_target
[i
]);
4506 } else if (max_bonds
) {
4507 /* miimon and arp_interval not set, we need one so things
4508 * work as expected, see bonding.txt for details
4510 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");
4513 if (primary
&& !bond_mode_uses_primary(bond_mode
)) {
4514 /* currently, using a primary only makes sense
4515 * in active backup, TLB or ALB modes
4517 pr_warn("Warning: %s primary device specified but has no effect in %s mode\n",
4518 primary
, bond_mode_name(bond_mode
));
4522 if (primary
&& primary_reselect
) {
4523 bond_opt_initstr(&newval
, primary_reselect
);
4524 valptr
= bond_opt_parse(bond_opt_get(BOND_OPT_PRIMARY_RESELECT
),
4527 pr_err("Error: Invalid primary_reselect \"%s\"\n",
4531 primary_reselect_value
= valptr
->value
;
4533 primary_reselect_value
= BOND_PRI_RESELECT_ALWAYS
;
4536 if (fail_over_mac
) {
4537 bond_opt_initstr(&newval
, fail_over_mac
);
4538 valptr
= bond_opt_parse(bond_opt_get(BOND_OPT_FAIL_OVER_MAC
),
4541 pr_err("Error: invalid fail_over_mac \"%s\"\n",
4545 fail_over_mac_value
= valptr
->value
;
4546 if (bond_mode
!= BOND_MODE_ACTIVEBACKUP
)
4547 pr_warn("Warning: fail_over_mac only affects active-backup mode\n");
4549 fail_over_mac_value
= BOND_FOM_NONE
;
4552 bond_opt_initstr(&newval
, "default");
4553 valptr
= bond_opt_parse(
4554 bond_opt_get(BOND_OPT_AD_ACTOR_SYS_PRIO
),
4557 pr_err("Error: No ad_actor_sys_prio default value");
4560 ad_actor_sys_prio
= valptr
->value
;
4562 valptr
= bond_opt_parse(bond_opt_get(BOND_OPT_AD_USER_PORT_KEY
),
4565 pr_err("Error: No ad_user_port_key default value");
4568 ad_user_port_key
= valptr
->value
;
4570 if (lp_interval
== 0) {
4571 pr_warn("Warning: ip_interval must be between 1 and %d, so it was reset to %d\n",
4572 INT_MAX
, BOND_ALB_DEFAULT_LP_INTERVAL
);
4573 lp_interval
= BOND_ALB_DEFAULT_LP_INTERVAL
;
4576 /* fill params struct with the proper values */
4577 params
->mode
= bond_mode
;
4578 params
->xmit_policy
= xmit_hashtype
;
4579 params
->miimon
= miimon
;
4580 params
->num_peer_notif
= num_peer_notif
;
4581 params
->arp_interval
= arp_interval
;
4582 params
->arp_validate
= arp_validate_value
;
4583 params
->arp_all_targets
= arp_all_targets_value
;
4584 params
->updelay
= updelay
;
4585 params
->downdelay
= downdelay
;
4586 params
->use_carrier
= use_carrier
;
4587 params
->lacp_fast
= lacp_fast
;
4588 params
->primary
[0] = 0;
4589 params
->primary_reselect
= primary_reselect_value
;
4590 params
->fail_over_mac
= fail_over_mac_value
;
4591 params
->tx_queues
= tx_queues
;
4592 params
->all_slaves_active
= all_slaves_active
;
4593 params
->resend_igmp
= resend_igmp
;
4594 params
->min_links
= min_links
;
4595 params
->lp_interval
= lp_interval
;
4596 params
->packets_per_slave
= packets_per_slave
;
4597 params
->tlb_dynamic_lb
= 1; /* Default value */
4598 params
->ad_actor_sys_prio
= ad_actor_sys_prio
;
4599 eth_zero_addr(params
->ad_actor_system
);
4600 params
->ad_user_port_key
= ad_user_port_key
;
4601 if (packets_per_slave
> 0) {
4602 params
->reciprocal_packets_per_slave
=
4603 reciprocal_value(packets_per_slave
);
4605 /* reciprocal_packets_per_slave is unused if
4606 * packets_per_slave is 0 or 1, just initialize it
4608 params
->reciprocal_packets_per_slave
=
4609 (struct reciprocal_value
) { 0 };
4613 strncpy(params
->primary
, primary
, IFNAMSIZ
);
4614 params
->primary
[IFNAMSIZ
- 1] = 0;
4617 memcpy(params
->arp_targets
, arp_target
, sizeof(arp_target
));
4622 /* Called from registration process */
4623 static int bond_init(struct net_device
*bond_dev
)
4625 struct bonding
*bond
= netdev_priv(bond_dev
);
4626 struct bond_net
*bn
= net_generic(dev_net(bond_dev
), bond_net_id
);
4628 netdev_dbg(bond_dev
, "Begin bond_init\n");
4630 bond
->wq
= create_singlethread_workqueue(bond_dev
->name
);
4634 netdev_lockdep_set_classes(bond_dev
);
4636 list_add_tail(&bond
->bond_list
, &bn
->dev_list
);
4638 bond_prepare_sysfs_group(bond
);
4640 bond_debug_register(bond
);
4642 /* Ensure valid dev_addr */
4643 if (is_zero_ether_addr(bond_dev
->dev_addr
) &&
4644 bond_dev
->addr_assign_type
== NET_ADDR_PERM
)
4645 eth_hw_addr_random(bond_dev
);
4650 unsigned int bond_get_num_tx_queues(void)
4655 /* Create a new bond based on the specified name and bonding parameters.
4656 * If name is NULL, obtain a suitable "bond%d" name for us.
4657 * Caller must NOT hold rtnl_lock; we need to release it here before we
4658 * set up our sysfs entries.
4660 int bond_create(struct net
*net
, const char *name
)
4662 struct net_device
*bond_dev
;
4663 struct bonding
*bond
;
4664 struct alb_bond_info
*bond_info
;
4669 bond_dev
= alloc_netdev_mq(sizeof(struct bonding
),
4670 name
? name
: "bond%d", NET_NAME_UNKNOWN
,
4671 bond_setup
, tx_queues
);
4673 pr_err("%s: eek! can't alloc netdev!\n", name
);
4679 * Initialize rx_hashtbl_used_head to RLB_NULL_INDEX.
4680 * It is set to 0 by default which is wrong.
4682 bond
= netdev_priv(bond_dev
);
4683 bond_info
= &(BOND_ALB_INFO(bond
));
4684 bond_info
->rx_hashtbl_used_head
= RLB_NULL_INDEX
;
4686 dev_net_set(bond_dev
, net
);
4687 bond_dev
->rtnl_link_ops
= &bond_link_ops
;
4689 res
= register_netdevice(bond_dev
);
4691 netif_carrier_off(bond_dev
);
4695 bond_destructor(bond_dev
);
4699 static int __net_init
bond_net_init(struct net
*net
)
4701 struct bond_net
*bn
= net_generic(net
, bond_net_id
);
4704 INIT_LIST_HEAD(&bn
->dev_list
);
4706 bond_create_proc_dir(bn
);
4707 bond_create_sysfs(bn
);
4712 static void __net_exit
bond_net_exit(struct net
*net
)
4714 struct bond_net
*bn
= net_generic(net
, bond_net_id
);
4715 struct bonding
*bond
, *tmp_bond
;
4718 bond_destroy_sysfs(bn
);
4720 /* Kill off any bonds created after unregistering bond rtnl ops */
4722 list_for_each_entry_safe(bond
, tmp_bond
, &bn
->dev_list
, bond_list
)
4723 unregister_netdevice_queue(bond
->dev
, &list
);
4724 unregister_netdevice_many(&list
);
4727 bond_destroy_proc_dir(bn
);
4730 static struct pernet_operations bond_net_ops
= {
4731 .init
= bond_net_init
,
4732 .exit
= bond_net_exit
,
4734 .size
= sizeof(struct bond_net
),
4737 static int __init
bonding_init(void)
4742 pr_info("%s", bond_version
);
4744 res
= bond_check_params(&bonding_defaults
);
4748 res
= register_pernet_subsys(&bond_net_ops
);
4752 res
= bond_netlink_init();
4756 bond_create_debugfs();
4758 for (i
= 0; i
< max_bonds
; i
++) {
4759 res
= bond_create(&init_net
, NULL
);
4764 register_netdevice_notifier(&bond_netdev_notifier
);
4768 bond_destroy_debugfs();
4769 bond_netlink_fini();
4771 unregister_pernet_subsys(&bond_net_ops
);
4776 static void __exit
bonding_exit(void)
4778 unregister_netdevice_notifier(&bond_netdev_notifier
);
4780 bond_destroy_debugfs();
4782 bond_netlink_fini();
4783 unregister_pernet_subsys(&bond_net_ops
);
4785 #ifdef CONFIG_NET_POLL_CONTROLLER
4786 /* Make sure we don't have an imbalance on our netpoll blocking */
4787 WARN_ON(atomic_read(&netpoll_block_tx
));
4791 module_init(bonding_init
);
4792 module_exit(bonding_exit
);
4793 MODULE_LICENSE("GPL");
4794 MODULE_VERSION(DRV_VERSION
);
4795 MODULE_DESCRIPTION(DRV_DESCRIPTION
", v" DRV_VERSION
);
4796 MODULE_AUTHOR("Thomas Davis, tadavis@lbl.gov and many others");