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
);
218 /*---------------------------- General routines -----------------------------*/
220 const char *bond_mode_name(int mode
)
222 static const char *names
[] = {
223 [BOND_MODE_ROUNDROBIN
] = "load balancing (round-robin)",
224 [BOND_MODE_ACTIVEBACKUP
] = "fault-tolerance (active-backup)",
225 [BOND_MODE_XOR
] = "load balancing (xor)",
226 [BOND_MODE_BROADCAST
] = "fault-tolerance (broadcast)",
227 [BOND_MODE_8023AD
] = "IEEE 802.3ad Dynamic link aggregation",
228 [BOND_MODE_TLB
] = "transmit load balancing",
229 [BOND_MODE_ALB
] = "adaptive load balancing",
232 if (mode
< BOND_MODE_ROUNDROBIN
|| mode
> BOND_MODE_ALB
)
238 /*---------------------------------- VLAN -----------------------------------*/
241 * bond_dev_queue_xmit - Prepare skb for xmit.
243 * @bond: bond device that got this skb for tx.
244 * @skb: hw accel VLAN tagged skb to transmit
245 * @slave_dev: slave that is supposed to xmit this skbuff
247 void bond_dev_queue_xmit(struct bonding
*bond
, struct sk_buff
*skb
,
248 struct net_device
*slave_dev
)
250 skb
->dev
= slave_dev
;
252 BUILD_BUG_ON(sizeof(skb
->queue_mapping
) !=
253 sizeof(qdisc_skb_cb(skb
)->slave_dev_queue_mapping
));
254 skb
->queue_mapping
= qdisc_skb_cb(skb
)->slave_dev_queue_mapping
;
256 if (unlikely(netpoll_tx_running(bond
->dev
)))
257 bond_netpoll_send_skb(bond_get_slave_by_dev(bond
, slave_dev
), skb
);
262 /* In the following 2 functions, bond_vlan_rx_add_vid and bond_vlan_rx_kill_vid,
263 * We don't protect the slave list iteration with a lock because:
264 * a. This operation is performed in IOCTL context,
265 * b. The operation is protected by the RTNL semaphore in the 8021q code,
266 * c. Holding a lock with BH disabled while directly calling a base driver
267 * entry point is generally a BAD idea.
269 * The design of synchronization/protection for this operation in the 8021q
270 * module is good for one or more VLAN devices over a single physical device
271 * and cannot be extended for a teaming solution like bonding, so there is a
272 * potential race condition here where a net device from the vlan group might
273 * be referenced (either by a base driver or the 8021q code) while it is being
274 * removed from the system. However, it turns out we're not making matters
275 * worse, and if it works for regular VLAN usage it will work here too.
279 * bond_vlan_rx_add_vid - Propagates adding an id to slaves
280 * @bond_dev: bonding net device that got called
281 * @vid: vlan id being added
283 static int bond_vlan_rx_add_vid(struct net_device
*bond_dev
,
284 __be16 proto
, u16 vid
)
286 struct bonding
*bond
= netdev_priv(bond_dev
);
287 struct slave
*slave
, *rollback_slave
;
288 struct list_head
*iter
;
291 bond_for_each_slave(bond
, slave
, iter
) {
292 res
= vlan_vid_add(slave
->dev
, proto
, vid
);
300 /* unwind to the slave that failed */
301 bond_for_each_slave(bond
, rollback_slave
, iter
) {
302 if (rollback_slave
== slave
)
305 vlan_vid_del(rollback_slave
->dev
, proto
, vid
);
312 * bond_vlan_rx_kill_vid - Propagates deleting an id to slaves
313 * @bond_dev: bonding net device that got called
314 * @vid: vlan id being removed
316 static int bond_vlan_rx_kill_vid(struct net_device
*bond_dev
,
317 __be16 proto
, u16 vid
)
319 struct bonding
*bond
= netdev_priv(bond_dev
);
320 struct list_head
*iter
;
323 bond_for_each_slave(bond
, slave
, iter
)
324 vlan_vid_del(slave
->dev
, proto
, vid
);
326 if (bond_is_lb(bond
))
327 bond_alb_clear_vlan(bond
, vid
);
332 /*------------------------------- Link status -------------------------------*/
334 /* Set the carrier state for the master according to the state of its
335 * slaves. If any slaves are up, the master is up. In 802.3ad mode,
336 * do special 802.3ad magic.
338 * Returns zero if carrier state does not change, nonzero if it does.
340 int bond_set_carrier(struct bonding
*bond
)
342 struct list_head
*iter
;
345 if (!bond_has_slaves(bond
))
348 if (BOND_MODE(bond
) == BOND_MODE_8023AD
)
349 return bond_3ad_set_carrier(bond
);
351 bond_for_each_slave(bond
, slave
, iter
) {
352 if (slave
->link
== BOND_LINK_UP
) {
353 if (!netif_carrier_ok(bond
->dev
)) {
354 netif_carrier_on(bond
->dev
);
362 if (netif_carrier_ok(bond
->dev
)) {
363 netif_carrier_off(bond
->dev
);
369 /* Get link speed and duplex from the slave's base driver
370 * using ethtool. If for some reason the call fails or the
371 * values are invalid, set speed and duplex to -1,
374 static void bond_update_speed_duplex(struct slave
*slave
)
376 struct net_device
*slave_dev
= slave
->dev
;
377 struct ethtool_cmd ecmd
;
381 slave
->speed
= SPEED_UNKNOWN
;
382 slave
->duplex
= DUPLEX_UNKNOWN
;
384 res
= __ethtool_get_settings(slave_dev
, &ecmd
);
388 slave_speed
= ethtool_cmd_speed(&ecmd
);
389 if (slave_speed
== 0 || slave_speed
== ((__u32
) -1))
392 switch (ecmd
.duplex
) {
400 slave
->speed
= slave_speed
;
401 slave
->duplex
= ecmd
.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->addr_len=%d\n",
622 bond_dev
, slave_dev
, 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
);
835 if (BOND_MODE(bond
) == BOND_MODE_8023AD
)
836 bond_3ad_handle_link_change(new_active
, BOND_LINK_UP
);
838 if (bond_is_lb(bond
))
839 bond_alb_handle_link_change(bond
, new_active
, BOND_LINK_UP
);
841 if (bond_uses_primary(bond
)) {
842 netdev_info(bond
->dev
, "making interface %s the new active one\n",
843 new_active
->dev
->name
);
848 if (bond_uses_primary(bond
))
849 bond_hw_addr_swap(bond
, new_active
, old_active
);
851 if (bond_is_lb(bond
)) {
852 bond_alb_handle_active_change(bond
, new_active
);
854 bond_set_slave_inactive_flags(old_active
,
855 BOND_SLAVE_NOTIFY_NOW
);
857 bond_set_slave_active_flags(new_active
,
858 BOND_SLAVE_NOTIFY_NOW
);
860 rcu_assign_pointer(bond
->curr_active_slave
, new_active
);
863 if (BOND_MODE(bond
) == BOND_MODE_ACTIVEBACKUP
) {
865 bond_set_slave_inactive_flags(old_active
,
866 BOND_SLAVE_NOTIFY_NOW
);
869 bool should_notify_peers
= false;
871 bond_set_slave_active_flags(new_active
,
872 BOND_SLAVE_NOTIFY_NOW
);
874 if (bond
->params
.fail_over_mac
)
875 bond_do_fail_over_mac(bond
, new_active
,
878 if (netif_running(bond
->dev
)) {
879 bond
->send_peer_notif
=
880 bond
->params
.num_peer_notif
;
881 should_notify_peers
=
882 bond_should_notify_peers(bond
);
885 call_netdevice_notifiers(NETDEV_BONDING_FAILOVER
, bond
->dev
);
886 if (should_notify_peers
)
887 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS
,
892 /* resend IGMP joins since active slave has changed or
893 * all were sent on curr_active_slave.
894 * resend only if bond is brought up with the affected
895 * bonding modes and the retransmission is enabled
897 if (netif_running(bond
->dev
) && (bond
->params
.resend_igmp
> 0) &&
898 ((bond_uses_primary(bond
) && new_active
) ||
899 BOND_MODE(bond
) == BOND_MODE_ROUNDROBIN
)) {
900 bond
->igmp_retrans
= bond
->params
.resend_igmp
;
901 queue_delayed_work(bond
->wq
, &bond
->mcast_work
, 1);
906 * bond_select_active_slave - select a new active slave, if needed
907 * @bond: our bonding struct
909 * This functions should be called when one of the following occurs:
910 * - The old curr_active_slave has been released or lost its link.
911 * - The primary_slave has got its link back.
912 * - A slave has got its link back and there's no old curr_active_slave.
914 * Caller must hold RTNL.
916 void bond_select_active_slave(struct bonding
*bond
)
918 struct slave
*best_slave
;
923 best_slave
= bond_find_best_slave(bond
);
924 if (best_slave
!= rtnl_dereference(bond
->curr_active_slave
)) {
925 bond_change_active_slave(bond
, best_slave
);
926 rv
= bond_set_carrier(bond
);
930 if (netif_carrier_ok(bond
->dev
)) {
931 netdev_info(bond
->dev
, "first active interface up!\n");
933 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_ALL_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_ALL_CSUM | NETIF_F_SG | NETIF_F_RXCSUM |\
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
;
1184 skb
->dev
= bond
->dev
;
1186 if (BOND_MODE(bond
) == BOND_MODE_ALB
&&
1187 bond
->dev
->priv_flags
& IFF_BRIDGE_PORT
&&
1188 skb
->pkt_type
== PACKET_HOST
) {
1190 if (unlikely(skb_cow_head(skb
,
1191 skb
->data
- skb_mac_header(skb
)))) {
1193 return RX_HANDLER_CONSUMED
;
1195 ether_addr_copy(eth_hdr(skb
)->h_dest
, bond
->dev
->dev_addr
);
1201 static int bond_master_upper_dev_link(struct net_device
*bond_dev
,
1202 struct net_device
*slave_dev
,
1203 struct slave
*slave
)
1207 err
= netdev_master_upper_dev_link_private(slave_dev
, bond_dev
, slave
);
1210 slave_dev
->flags
|= IFF_SLAVE
;
1211 rtmsg_ifinfo(RTM_NEWLINK
, slave_dev
, IFF_SLAVE
, GFP_KERNEL
);
1215 static void bond_upper_dev_unlink(struct net_device
*bond_dev
,
1216 struct net_device
*slave_dev
)
1218 netdev_upper_dev_unlink(slave_dev
, bond_dev
);
1219 slave_dev
->flags
&= ~IFF_SLAVE
;
1220 rtmsg_ifinfo(RTM_NEWLINK
, slave_dev
, IFF_SLAVE
, GFP_KERNEL
);
1223 static struct slave
*bond_alloc_slave(struct bonding
*bond
)
1225 struct slave
*slave
= NULL
;
1227 slave
= kzalloc(sizeof(struct slave
), GFP_KERNEL
);
1231 if (BOND_MODE(bond
) == BOND_MODE_8023AD
) {
1232 SLAVE_AD_INFO(slave
) = kzalloc(sizeof(struct ad_slave_info
),
1234 if (!SLAVE_AD_INFO(slave
)) {
1242 static void bond_free_slave(struct slave
*slave
)
1244 struct bonding
*bond
= bond_get_bond_by_slave(slave
);
1246 if (BOND_MODE(bond
) == BOND_MODE_8023AD
)
1247 kfree(SLAVE_AD_INFO(slave
));
1252 static void bond_fill_ifbond(struct bonding
*bond
, struct ifbond
*info
)
1254 info
->bond_mode
= BOND_MODE(bond
);
1255 info
->miimon
= bond
->params
.miimon
;
1256 info
->num_slaves
= bond
->slave_cnt
;
1259 static void bond_fill_ifslave(struct slave
*slave
, struct ifslave
*info
)
1261 strcpy(info
->slave_name
, slave
->dev
->name
);
1262 info
->link
= slave
->link
;
1263 info
->state
= bond_slave_state(slave
);
1264 info
->link_failure_count
= slave
->link_failure_count
;
1267 static void bond_netdev_notify(struct net_device
*dev
,
1268 struct netdev_bonding_info
*info
)
1271 netdev_bonding_info_change(dev
, info
);
1275 static void bond_netdev_notify_work(struct work_struct
*_work
)
1277 struct netdev_notify_work
*w
=
1278 container_of(_work
, struct netdev_notify_work
, work
.work
);
1280 bond_netdev_notify(w
->dev
, &w
->bonding_info
);
1285 void bond_queue_slave_event(struct slave
*slave
)
1287 struct bonding
*bond
= slave
->bond
;
1288 struct netdev_notify_work
*nnw
= kzalloc(sizeof(*nnw
), GFP_ATOMIC
);
1293 dev_hold(slave
->dev
);
1294 nnw
->dev
= slave
->dev
;
1295 bond_fill_ifslave(slave
, &nnw
->bonding_info
.slave
);
1296 bond_fill_ifbond(bond
, &nnw
->bonding_info
.master
);
1297 INIT_DELAYED_WORK(&nnw
->work
, bond_netdev_notify_work
);
1299 queue_delayed_work(slave
->bond
->wq
, &nnw
->work
, 0);
1302 /* enslave device <slave> to bond device <master> */
1303 int bond_enslave(struct net_device
*bond_dev
, struct net_device
*slave_dev
)
1305 struct bonding
*bond
= netdev_priv(bond_dev
);
1306 const struct net_device_ops
*slave_ops
= slave_dev
->netdev_ops
;
1307 struct slave
*new_slave
= NULL
, *prev_slave
;
1308 struct sockaddr addr
;
1312 if (!bond
->params
.use_carrier
&&
1313 slave_dev
->ethtool_ops
->get_link
== NULL
&&
1314 slave_ops
->ndo_do_ioctl
== NULL
) {
1315 netdev_warn(bond_dev
, "no link monitoring support for %s\n",
1319 /* already enslaved */
1320 if (slave_dev
->flags
& IFF_SLAVE
) {
1321 netdev_dbg(bond_dev
, "Error: Device was already enslaved\n");
1325 if (bond_dev
== slave_dev
) {
1326 netdev_err(bond_dev
, "cannot enslave bond to itself.\n");
1330 /* vlan challenged mutual exclusion */
1331 /* no need to lock since we're protected by rtnl_lock */
1332 if (slave_dev
->features
& NETIF_F_VLAN_CHALLENGED
) {
1333 netdev_dbg(bond_dev
, "%s is NETIF_F_VLAN_CHALLENGED\n",
1335 if (vlan_uses_dev(bond_dev
)) {
1336 netdev_err(bond_dev
, "Error: cannot enslave VLAN challenged slave %s on VLAN enabled bond %s\n",
1337 slave_dev
->name
, bond_dev
->name
);
1340 netdev_warn(bond_dev
, "enslaved VLAN challenged slave %s. Adding VLANs will be blocked as long as %s is part of bond %s\n",
1341 slave_dev
->name
, slave_dev
->name
,
1345 netdev_dbg(bond_dev
, "%s is !NETIF_F_VLAN_CHALLENGED\n",
1349 /* Old ifenslave binaries are no longer supported. These can
1350 * be identified with moderate accuracy by the state of the slave:
1351 * the current ifenslave will set the interface down prior to
1352 * enslaving it; the old ifenslave will not.
1354 if ((slave_dev
->flags
& IFF_UP
)) {
1355 netdev_err(bond_dev
, "%s is up - this may be due to an out of date ifenslave\n",
1358 goto err_undo_flags
;
1361 /* set bonding device ether type by slave - bonding netdevices are
1362 * created with ether_setup, so when the slave type is not ARPHRD_ETHER
1363 * there is a need to override some of the type dependent attribs/funcs.
1365 * bond ether type mutual exclusion - don't allow slaves of dissimilar
1366 * ether type (eg ARPHRD_ETHER and ARPHRD_INFINIBAND) share the same bond
1368 if (!bond_has_slaves(bond
)) {
1369 if (bond_dev
->type
!= slave_dev
->type
) {
1370 netdev_dbg(bond_dev
, "change device type from %d to %d\n",
1371 bond_dev
->type
, slave_dev
->type
);
1373 res
= call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE
,
1375 res
= notifier_to_errno(res
);
1377 netdev_err(bond_dev
, "refused to change device type\n");
1379 goto err_undo_flags
;
1382 /* Flush unicast and multicast addresses */
1383 dev_uc_flush(bond_dev
);
1384 dev_mc_flush(bond_dev
);
1386 if (slave_dev
->type
!= ARPHRD_ETHER
)
1387 bond_setup_by_slave(bond_dev
, slave_dev
);
1389 ether_setup(bond_dev
);
1390 bond_dev
->priv_flags
&= ~IFF_TX_SKB_SHARING
;
1393 call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE
,
1396 } else if (bond_dev
->type
!= slave_dev
->type
) {
1397 netdev_err(bond_dev
, "%s ether type (%d) is different from other slaves (%d), can not enslave it\n",
1398 slave_dev
->name
, slave_dev
->type
, bond_dev
->type
);
1400 goto err_undo_flags
;
1403 if (slave_ops
->ndo_set_mac_address
== NULL
) {
1404 netdev_warn(bond_dev
, "The slave device specified does not support setting the MAC address\n");
1405 if (BOND_MODE(bond
) == BOND_MODE_ACTIVEBACKUP
&&
1406 bond
->params
.fail_over_mac
!= BOND_FOM_ACTIVE
) {
1407 if (!bond_has_slaves(bond
)) {
1408 bond
->params
.fail_over_mac
= BOND_FOM_ACTIVE
;
1409 netdev_warn(bond_dev
, "Setting fail_over_mac to active for active-backup mode\n");
1411 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");
1413 goto err_undo_flags
;
1418 call_netdevice_notifiers(NETDEV_JOIN
, slave_dev
);
1420 /* If this is the first slave, then we need to set the master's hardware
1421 * address to be the same as the slave's.
1423 if (!bond_has_slaves(bond
) &&
1424 bond
->dev
->addr_assign_type
== NET_ADDR_RANDOM
)
1425 bond_set_dev_addr(bond
->dev
, slave_dev
);
1427 new_slave
= bond_alloc_slave(bond
);
1430 goto err_undo_flags
;
1433 new_slave
->bond
= bond
;
1434 new_slave
->dev
= slave_dev
;
1435 /* Set the new_slave's queue_id to be zero. Queue ID mapping
1436 * is set via sysfs or module option if desired.
1438 new_slave
->queue_id
= 0;
1440 /* Save slave's original mtu and then set it to match the bond */
1441 new_slave
->original_mtu
= slave_dev
->mtu
;
1442 res
= dev_set_mtu(slave_dev
, bond
->dev
->mtu
);
1444 netdev_dbg(bond_dev
, "Error %d calling dev_set_mtu\n", res
);
1448 /* Save slave's original ("permanent") mac address for modes
1449 * that need it, and for restoring it upon release, and then
1450 * set it to the master's address
1452 ether_addr_copy(new_slave
->perm_hwaddr
, slave_dev
->dev_addr
);
1454 if (!bond
->params
.fail_over_mac
||
1455 BOND_MODE(bond
) != BOND_MODE_ACTIVEBACKUP
) {
1456 /* Set slave to master's mac address. The application already
1457 * set the master's mac address to that of the first slave
1459 memcpy(addr
.sa_data
, bond_dev
->dev_addr
, bond_dev
->addr_len
);
1460 addr
.sa_family
= slave_dev
->type
;
1461 res
= dev_set_mac_address(slave_dev
, &addr
);
1463 netdev_dbg(bond_dev
, "Error %d calling set_mac_address\n", res
);
1464 goto err_restore_mtu
;
1468 /* open the slave since the application closed it */
1469 res
= dev_open(slave_dev
);
1471 netdev_dbg(bond_dev
, "Opening slave %s failed\n", slave_dev
->name
);
1472 goto err_restore_mac
;
1475 slave_dev
->priv_flags
|= IFF_BONDING
;
1476 /* initialize slave stats */
1477 dev_get_stats(new_slave
->dev
, &new_slave
->slave_stats
);
1479 if (bond_is_lb(bond
)) {
1480 /* bond_alb_init_slave() must be called before all other stages since
1481 * it might fail and we do not want to have to undo everything
1483 res
= bond_alb_init_slave(bond
, new_slave
);
1488 /* If the mode uses primary, then the following is handled by
1489 * bond_change_active_slave().
1491 if (!bond_uses_primary(bond
)) {
1492 /* set promiscuity level to new slave */
1493 if (bond_dev
->flags
& IFF_PROMISC
) {
1494 res
= dev_set_promiscuity(slave_dev
, 1);
1499 /* set allmulti level to new slave */
1500 if (bond_dev
->flags
& IFF_ALLMULTI
) {
1501 res
= dev_set_allmulti(slave_dev
, 1);
1506 netif_addr_lock_bh(bond_dev
);
1508 dev_mc_sync_multiple(slave_dev
, bond_dev
);
1509 dev_uc_sync_multiple(slave_dev
, bond_dev
);
1511 netif_addr_unlock_bh(bond_dev
);
1514 if (BOND_MODE(bond
) == BOND_MODE_8023AD
) {
1515 /* add lacpdu mc addr to mc list */
1516 u8 lacpdu_multicast
[ETH_ALEN
] = MULTICAST_LACPDU_ADDR
;
1518 dev_mc_add(slave_dev
, lacpdu_multicast
);
1521 res
= vlan_vids_add_by_dev(slave_dev
, bond_dev
);
1523 netdev_err(bond_dev
, "Couldn't add bond vlan ids to %s\n",
1528 prev_slave
= bond_last_slave(bond
);
1530 new_slave
->delay
= 0;
1531 new_slave
->link_failure_count
= 0;
1533 bond_update_speed_duplex(new_slave
);
1535 new_slave
->last_rx
= jiffies
-
1536 (msecs_to_jiffies(bond
->params
.arp_interval
) + 1);
1537 for (i
= 0; i
< BOND_MAX_ARP_TARGETS
; i
++)
1538 new_slave
->target_last_arp_rx
[i
] = new_slave
->last_rx
;
1540 if (bond
->params
.miimon
&& !bond
->params
.use_carrier
) {
1541 link_reporting
= bond_check_dev_link(bond
, slave_dev
, 1);
1543 if ((link_reporting
== -1) && !bond
->params
.arp_interval
) {
1544 /* miimon is set but a bonded network driver
1545 * does not support ETHTOOL/MII and
1546 * arp_interval is not set. Note: if
1547 * use_carrier is enabled, we will never go
1548 * here (because netif_carrier is always
1549 * supported); thus, we don't need to change
1550 * the messages for netif_carrier.
1552 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",
1554 } else if (link_reporting
== -1) {
1555 /* unable get link status using mii/ethtool */
1556 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",
1561 /* check for initial state */
1562 if (bond
->params
.miimon
) {
1563 if (bond_check_dev_link(bond
, slave_dev
, 0) == BMSR_LSTATUS
) {
1564 if (bond
->params
.updelay
) {
1565 bond_set_slave_link_state(new_slave
,
1567 new_slave
->delay
= bond
->params
.updelay
;
1569 bond_set_slave_link_state(new_slave
,
1573 bond_set_slave_link_state(new_slave
, BOND_LINK_DOWN
);
1575 } else if (bond
->params
.arp_interval
) {
1576 bond_set_slave_link_state(new_slave
,
1577 (netif_carrier_ok(slave_dev
) ?
1578 BOND_LINK_UP
: BOND_LINK_DOWN
));
1580 bond_set_slave_link_state(new_slave
, BOND_LINK_UP
);
1583 if (new_slave
->link
!= BOND_LINK_DOWN
)
1584 new_slave
->last_link_up
= jiffies
;
1585 netdev_dbg(bond_dev
, "Initial state of slave_dev is BOND_LINK_%s\n",
1586 new_slave
->link
== BOND_LINK_DOWN
? "DOWN" :
1587 (new_slave
->link
== BOND_LINK_UP
? "UP" : "BACK"));
1589 if (bond_uses_primary(bond
) && bond
->params
.primary
[0]) {
1590 /* if there is a primary slave, remember it */
1591 if (strcmp(bond
->params
.primary
, new_slave
->dev
->name
) == 0) {
1592 rcu_assign_pointer(bond
->primary_slave
, new_slave
);
1593 bond
->force_primary
= true;
1597 switch (BOND_MODE(bond
)) {
1598 case BOND_MODE_ACTIVEBACKUP
:
1599 bond_set_slave_inactive_flags(new_slave
,
1600 BOND_SLAVE_NOTIFY_NOW
);
1602 case BOND_MODE_8023AD
:
1603 /* in 802.3ad mode, the internal mechanism
1604 * will activate the slaves in the selected
1607 bond_set_slave_inactive_flags(new_slave
, BOND_SLAVE_NOTIFY_NOW
);
1608 /* if this is the first slave */
1610 SLAVE_AD_INFO(new_slave
)->id
= 1;
1611 /* Initialize AD with the number of times that the AD timer is called in 1 second
1612 * can be called only after the mac address of the bond is set
1614 bond_3ad_initialize(bond
, 1000/AD_TIMER_INTERVAL
);
1616 SLAVE_AD_INFO(new_slave
)->id
=
1617 SLAVE_AD_INFO(prev_slave
)->id
+ 1;
1620 bond_3ad_bind_slave(new_slave
);
1624 bond_set_active_slave(new_slave
);
1625 bond_set_slave_inactive_flags(new_slave
, BOND_SLAVE_NOTIFY_NOW
);
1628 netdev_dbg(bond_dev
, "This slave is always active in trunk mode\n");
1630 /* always active in trunk mode */
1631 bond_set_active_slave(new_slave
);
1633 /* In trunking mode there is little meaning to curr_active_slave
1634 * anyway (it holds no special properties of the bond device),
1635 * so we can change it without calling change_active_interface()
1637 if (!rcu_access_pointer(bond
->curr_active_slave
) &&
1638 new_slave
->link
== BOND_LINK_UP
)
1639 rcu_assign_pointer(bond
->curr_active_slave
, new_slave
);
1642 } /* switch(bond_mode) */
1644 #ifdef CONFIG_NET_POLL_CONTROLLER
1645 slave_dev
->npinfo
= bond
->dev
->npinfo
;
1646 if (slave_dev
->npinfo
) {
1647 if (slave_enable_netpoll(new_slave
)) {
1648 netdev_info(bond_dev
, "master_dev is using netpoll, but new slave device does not support netpoll\n");
1655 if (!(bond_dev
->features
& NETIF_F_LRO
))
1656 dev_disable_lro(slave_dev
);
1658 res
= netdev_rx_handler_register(slave_dev
, bond_handle_frame
,
1661 netdev_dbg(bond_dev
, "Error %d calling netdev_rx_handler_register\n", res
);
1665 res
= bond_master_upper_dev_link(bond_dev
, slave_dev
, new_slave
);
1667 netdev_dbg(bond_dev
, "Error %d calling bond_master_upper_dev_link\n", res
);
1668 goto err_unregister
;
1671 res
= bond_sysfs_slave_add(new_slave
);
1673 netdev_dbg(bond_dev
, "Error %d calling bond_sysfs_slave_add\n", res
);
1674 goto err_upper_unlink
;
1678 bond_compute_features(bond
);
1679 bond_set_carrier(bond
);
1681 if (bond_uses_primary(bond
)) {
1683 bond_select_active_slave(bond
);
1684 unblock_netpoll_tx();
1687 if (bond_mode_uses_xmit_hash(bond
))
1688 bond_update_slave_arr(bond
, NULL
);
1690 netdev_info(bond_dev
, "Enslaving %s as %s interface with %s link\n",
1692 bond_is_active_slave(new_slave
) ? "an active" : "a backup",
1693 new_slave
->link
!= BOND_LINK_DOWN
? "an up" : "a down");
1695 /* enslave is successful */
1696 bond_queue_slave_event(new_slave
);
1699 /* Undo stages on error */
1701 bond_upper_dev_unlink(bond_dev
, slave_dev
);
1704 netdev_rx_handler_unregister(slave_dev
);
1707 if (!bond_uses_primary(bond
))
1708 bond_hw_addr_flush(bond_dev
, slave_dev
);
1710 vlan_vids_del_by_dev(slave_dev
, bond_dev
);
1711 if (rcu_access_pointer(bond
->primary_slave
) == new_slave
)
1712 RCU_INIT_POINTER(bond
->primary_slave
, NULL
);
1713 if (rcu_access_pointer(bond
->curr_active_slave
) == new_slave
) {
1715 bond_change_active_slave(bond
, NULL
);
1716 bond_select_active_slave(bond
);
1717 unblock_netpoll_tx();
1719 /* either primary_slave or curr_active_slave might've changed */
1721 slave_disable_netpoll(new_slave
);
1724 slave_dev
->priv_flags
&= ~IFF_BONDING
;
1725 dev_close(slave_dev
);
1728 if (!bond
->params
.fail_over_mac
||
1729 BOND_MODE(bond
) != BOND_MODE_ACTIVEBACKUP
) {
1730 /* XXX TODO - fom follow mode needs to change master's
1731 * MAC if this slave's MAC is in use by the bond, or at
1732 * least print a warning.
1734 ether_addr_copy(addr
.sa_data
, new_slave
->perm_hwaddr
);
1735 addr
.sa_family
= slave_dev
->type
;
1736 dev_set_mac_address(slave_dev
, &addr
);
1740 dev_set_mtu(slave_dev
, new_slave
->original_mtu
);
1743 bond_free_slave(new_slave
);
1746 /* Enslave of first slave has failed and we need to fix master's mac */
1747 if (!bond_has_slaves(bond
)) {
1748 if (ether_addr_equal_64bits(bond_dev
->dev_addr
,
1749 slave_dev
->dev_addr
))
1750 eth_hw_addr_random(bond_dev
);
1751 if (bond_dev
->type
!= ARPHRD_ETHER
) {
1752 ether_setup(bond_dev
);
1753 bond_dev
->flags
|= IFF_MASTER
;
1754 bond_dev
->priv_flags
&= ~IFF_TX_SKB_SHARING
;
1761 /* Try to release the slave device <slave> from the bond device <master>
1762 * It is legal to access curr_active_slave without a lock because all the function
1763 * is RTNL-locked. If "all" is true it means that the function is being called
1764 * while destroying a bond interface and all slaves are being released.
1766 * The rules for slave state should be:
1767 * for Active/Backup:
1768 * Active stays on all backups go down
1769 * for Bonded connections:
1770 * The first up interface should be left on and all others downed.
1772 static int __bond_release_one(struct net_device
*bond_dev
,
1773 struct net_device
*slave_dev
,
1776 struct bonding
*bond
= netdev_priv(bond_dev
);
1777 struct slave
*slave
, *oldcurrent
;
1778 struct sockaddr addr
;
1779 int old_flags
= bond_dev
->flags
;
1780 netdev_features_t old_features
= bond_dev
->features
;
1782 /* slave is not a slave or master is not master of this slave */
1783 if (!(slave_dev
->flags
& IFF_SLAVE
) ||
1784 !netdev_has_upper_dev(slave_dev
, bond_dev
)) {
1785 netdev_dbg(bond_dev
, "cannot release %s\n",
1792 slave
= bond_get_slave_by_dev(bond
, slave_dev
);
1794 /* not a slave of this bond */
1795 netdev_info(bond_dev
, "%s not enslaved\n",
1797 unblock_netpoll_tx();
1801 bond_sysfs_slave_del(slave
);
1803 /* recompute stats just before removing the slave */
1804 bond_get_stats(bond
->dev
, &bond
->bond_stats
);
1806 bond_upper_dev_unlink(bond_dev
, slave_dev
);
1807 /* unregister rx_handler early so bond_handle_frame wouldn't be called
1808 * for this slave anymore.
1810 netdev_rx_handler_unregister(slave_dev
);
1812 if (BOND_MODE(bond
) == BOND_MODE_8023AD
)
1813 bond_3ad_unbind_slave(slave
);
1815 if (bond_mode_uses_xmit_hash(bond
))
1816 bond_update_slave_arr(bond
, slave
);
1818 netdev_info(bond_dev
, "Releasing %s interface %s\n",
1819 bond_is_active_slave(slave
) ? "active" : "backup",
1822 oldcurrent
= rcu_access_pointer(bond
->curr_active_slave
);
1824 RCU_INIT_POINTER(bond
->current_arp_slave
, NULL
);
1826 if (!all
&& (!bond
->params
.fail_over_mac
||
1827 BOND_MODE(bond
) != BOND_MODE_ACTIVEBACKUP
)) {
1828 if (ether_addr_equal_64bits(bond_dev
->dev_addr
, slave
->perm_hwaddr
) &&
1829 bond_has_slaves(bond
))
1830 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",
1831 slave_dev
->name
, slave
->perm_hwaddr
,
1832 bond_dev
->name
, slave_dev
->name
);
1835 if (rtnl_dereference(bond
->primary_slave
) == slave
)
1836 RCU_INIT_POINTER(bond
->primary_slave
, NULL
);
1838 if (oldcurrent
== slave
)
1839 bond_change_active_slave(bond
, NULL
);
1841 if (bond_is_lb(bond
)) {
1842 /* Must be called only after the slave has been
1843 * detached from the list and the curr_active_slave
1844 * has been cleared (if our_slave == old_current),
1845 * but before a new active slave is selected.
1847 bond_alb_deinit_slave(bond
, slave
);
1851 RCU_INIT_POINTER(bond
->curr_active_slave
, NULL
);
1852 } else if (oldcurrent
== slave
) {
1853 /* Note that we hold RTNL over this sequence, so there
1854 * is no concern that another slave add/remove event
1857 bond_select_active_slave(bond
);
1860 if (!bond_has_slaves(bond
)) {
1861 bond_set_carrier(bond
);
1862 eth_hw_addr_random(bond_dev
);
1865 unblock_netpoll_tx();
1869 if (!bond_has_slaves(bond
)) {
1870 call_netdevice_notifiers(NETDEV_CHANGEADDR
, bond
->dev
);
1871 call_netdevice_notifiers(NETDEV_RELEASE
, bond
->dev
);
1874 bond_compute_features(bond
);
1875 if (!(bond_dev
->features
& NETIF_F_VLAN_CHALLENGED
) &&
1876 (old_features
& NETIF_F_VLAN_CHALLENGED
))
1877 netdev_info(bond_dev
, "last VLAN challenged slave %s left bond %s - VLAN blocking is removed\n",
1878 slave_dev
->name
, bond_dev
->name
);
1880 vlan_vids_del_by_dev(slave_dev
, bond_dev
);
1882 /* If the mode uses primary, then this case was handled above by
1883 * bond_change_active_slave(..., NULL)
1885 if (!bond_uses_primary(bond
)) {
1886 /* unset promiscuity level from slave
1887 * NOTE: The NETDEV_CHANGEADDR call above may change the value
1888 * of the IFF_PROMISC flag in the bond_dev, but we need the
1889 * value of that flag before that change, as that was the value
1890 * when this slave was attached, so we cache at the start of the
1891 * function and use it here. Same goes for ALLMULTI below
1893 if (old_flags
& IFF_PROMISC
)
1894 dev_set_promiscuity(slave_dev
, -1);
1896 /* unset allmulti level from slave */
1897 if (old_flags
& IFF_ALLMULTI
)
1898 dev_set_allmulti(slave_dev
, -1);
1900 bond_hw_addr_flush(bond_dev
, slave_dev
);
1903 slave_disable_netpoll(slave
);
1905 /* close slave before restoring its mac address */
1906 dev_close(slave_dev
);
1908 if (bond
->params
.fail_over_mac
!= BOND_FOM_ACTIVE
||
1909 BOND_MODE(bond
) != BOND_MODE_ACTIVEBACKUP
) {
1910 /* restore original ("permanent") mac address */
1911 ether_addr_copy(addr
.sa_data
, slave
->perm_hwaddr
);
1912 addr
.sa_family
= slave_dev
->type
;
1913 dev_set_mac_address(slave_dev
, &addr
);
1916 dev_set_mtu(slave_dev
, slave
->original_mtu
);
1918 slave_dev
->priv_flags
&= ~IFF_BONDING
;
1920 bond_free_slave(slave
);
1925 /* A wrapper used because of ndo_del_link */
1926 int bond_release(struct net_device
*bond_dev
, struct net_device
*slave_dev
)
1928 return __bond_release_one(bond_dev
, slave_dev
, false);
1931 /* First release a slave and then destroy the bond if no more slaves are left.
1932 * Must be under rtnl_lock when this function is called.
1934 static int bond_release_and_destroy(struct net_device
*bond_dev
,
1935 struct net_device
*slave_dev
)
1937 struct bonding
*bond
= netdev_priv(bond_dev
);
1940 ret
= bond_release(bond_dev
, slave_dev
);
1941 if (ret
== 0 && !bond_has_slaves(bond
)) {
1942 bond_dev
->priv_flags
|= IFF_DISABLE_NETPOLL
;
1943 netdev_info(bond_dev
, "Destroying bond %s\n",
1945 bond_remove_proc_entry(bond
);
1946 unregister_netdevice(bond_dev
);
1951 static int bond_info_query(struct net_device
*bond_dev
, struct ifbond
*info
)
1953 struct bonding
*bond
= netdev_priv(bond_dev
);
1954 bond_fill_ifbond(bond
, info
);
1958 static int bond_slave_info_query(struct net_device
*bond_dev
, struct ifslave
*info
)
1960 struct bonding
*bond
= netdev_priv(bond_dev
);
1961 struct list_head
*iter
;
1962 int i
= 0, res
= -ENODEV
;
1963 struct slave
*slave
;
1965 bond_for_each_slave(bond
, slave
, iter
) {
1966 if (i
++ == (int)info
->slave_id
) {
1968 bond_fill_ifslave(slave
, info
);
1976 /*-------------------------------- Monitoring -------------------------------*/
1978 /* called with rcu_read_lock() */
1979 static int bond_miimon_inspect(struct bonding
*bond
)
1981 int link_state
, commit
= 0;
1982 struct list_head
*iter
;
1983 struct slave
*slave
;
1984 bool ignore_updelay
;
1986 ignore_updelay
= !rcu_dereference(bond
->curr_active_slave
);
1988 bond_for_each_slave_rcu(bond
, slave
, iter
) {
1989 slave
->new_link
= BOND_LINK_NOCHANGE
;
1991 link_state
= bond_check_dev_link(bond
, slave
->dev
, 0);
1993 switch (slave
->link
) {
1998 bond_set_slave_link_state(slave
, BOND_LINK_FAIL
);
1999 slave
->delay
= bond
->params
.downdelay
;
2001 netdev_info(bond
->dev
, "link status down for %sinterface %s, disabling it in %d ms\n",
2003 BOND_MODE_ACTIVEBACKUP
) ?
2004 (bond_is_active_slave(slave
) ?
2005 "active " : "backup ") : "",
2007 bond
->params
.downdelay
* bond
->params
.miimon
);
2010 case BOND_LINK_FAIL
:
2012 /* recovered before downdelay expired */
2013 bond_set_slave_link_state(slave
, BOND_LINK_UP
);
2014 slave
->last_link_up
= jiffies
;
2015 netdev_info(bond
->dev
, "link status up again after %d ms for interface %s\n",
2016 (bond
->params
.downdelay
- slave
->delay
) *
2017 bond
->params
.miimon
,
2022 if (slave
->delay
<= 0) {
2023 slave
->new_link
= BOND_LINK_DOWN
;
2031 case BOND_LINK_DOWN
:
2035 bond_set_slave_link_state(slave
, BOND_LINK_BACK
);
2036 slave
->delay
= bond
->params
.updelay
;
2039 netdev_info(bond
->dev
, "link status up for interface %s, enabling it in %d ms\n",
2041 ignore_updelay
? 0 :
2042 bond
->params
.updelay
*
2043 bond
->params
.miimon
);
2046 case BOND_LINK_BACK
:
2048 bond_set_slave_link_state(slave
,
2050 netdev_info(bond
->dev
, "link status down again after %d ms for interface %s\n",
2051 (bond
->params
.updelay
- slave
->delay
) *
2052 bond
->params
.miimon
,
2061 if (slave
->delay
<= 0) {
2062 slave
->new_link
= BOND_LINK_UP
;
2064 ignore_updelay
= false;
2076 static void bond_miimon_commit(struct bonding
*bond
)
2078 struct list_head
*iter
;
2079 struct slave
*slave
, *primary
;
2081 bond_for_each_slave(bond
, slave
, iter
) {
2082 switch (slave
->new_link
) {
2083 case BOND_LINK_NOCHANGE
:
2087 bond_set_slave_link_state(slave
, BOND_LINK_UP
);
2088 slave
->last_link_up
= jiffies
;
2090 primary
= rtnl_dereference(bond
->primary_slave
);
2091 if (BOND_MODE(bond
) == BOND_MODE_8023AD
) {
2092 /* prevent it from being the active one */
2093 bond_set_backup_slave(slave
);
2094 } else if (BOND_MODE(bond
) != BOND_MODE_ACTIVEBACKUP
) {
2095 /* make it immediately active */
2096 bond_set_active_slave(slave
);
2097 } else if (slave
!= primary
) {
2098 /* prevent it from being the active one */
2099 bond_set_backup_slave(slave
);
2102 netdev_info(bond
->dev
, "link status definitely up for interface %s, %u Mbps %s duplex\n",
2104 slave
->speed
== SPEED_UNKNOWN
? 0 : slave
->speed
,
2105 slave
->duplex
? "full" : "half");
2107 /* notify ad that the link status has changed */
2108 if (BOND_MODE(bond
) == BOND_MODE_8023AD
)
2109 bond_3ad_handle_link_change(slave
, BOND_LINK_UP
);
2111 if (bond_is_lb(bond
))
2112 bond_alb_handle_link_change(bond
, slave
,
2115 if (BOND_MODE(bond
) == BOND_MODE_XOR
)
2116 bond_update_slave_arr(bond
, NULL
);
2118 if (!bond
->curr_active_slave
|| slave
== primary
)
2123 case BOND_LINK_DOWN
:
2124 if (slave
->link_failure_count
< UINT_MAX
)
2125 slave
->link_failure_count
++;
2127 bond_set_slave_link_state(slave
, BOND_LINK_DOWN
);
2129 if (BOND_MODE(bond
) == BOND_MODE_ACTIVEBACKUP
||
2130 BOND_MODE(bond
) == BOND_MODE_8023AD
)
2131 bond_set_slave_inactive_flags(slave
,
2132 BOND_SLAVE_NOTIFY_NOW
);
2134 netdev_info(bond
->dev
, "link status definitely down for interface %s, disabling it\n",
2137 if (BOND_MODE(bond
) == BOND_MODE_8023AD
)
2138 bond_3ad_handle_link_change(slave
,
2141 if (bond_is_lb(bond
))
2142 bond_alb_handle_link_change(bond
, slave
,
2145 if (BOND_MODE(bond
) == BOND_MODE_XOR
)
2146 bond_update_slave_arr(bond
, NULL
);
2148 if (slave
== rcu_access_pointer(bond
->curr_active_slave
))
2154 netdev_err(bond
->dev
, "invalid new link %d on slave %s\n",
2155 slave
->new_link
, slave
->dev
->name
);
2156 slave
->new_link
= BOND_LINK_NOCHANGE
;
2163 bond_select_active_slave(bond
);
2164 unblock_netpoll_tx();
2167 bond_set_carrier(bond
);
2172 * Really a wrapper that splits the mii monitor into two phases: an
2173 * inspection, then (if inspection indicates something needs to be done)
2174 * an acquisition of appropriate locks followed by a commit phase to
2175 * implement whatever link state changes are indicated.
2177 static void bond_mii_monitor(struct work_struct
*work
)
2179 struct bonding
*bond
= container_of(work
, struct bonding
,
2181 bool should_notify_peers
= false;
2182 unsigned long delay
;
2184 delay
= msecs_to_jiffies(bond
->params
.miimon
);
2186 if (!bond_has_slaves(bond
))
2191 should_notify_peers
= bond_should_notify_peers(bond
);
2193 if (bond_miimon_inspect(bond
)) {
2196 /* Race avoidance with bond_close cancel of workqueue */
2197 if (!rtnl_trylock()) {
2199 should_notify_peers
= false;
2203 bond_miimon_commit(bond
);
2205 rtnl_unlock(); /* might sleep, hold no other locks */
2210 if (bond
->params
.miimon
)
2211 queue_delayed_work(bond
->wq
, &bond
->mii_work
, delay
);
2213 if (should_notify_peers
) {
2214 if (!rtnl_trylock())
2216 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS
, bond
->dev
);
2221 static bool bond_has_this_ip(struct bonding
*bond
, __be32 ip
)
2223 struct net_device
*upper
;
2224 struct list_head
*iter
;
2227 if (ip
== bond_confirm_addr(bond
->dev
, 0, ip
))
2231 netdev_for_each_all_upper_dev_rcu(bond
->dev
, upper
, iter
) {
2232 if (ip
== bond_confirm_addr(upper
, 0, ip
)) {
2242 /* We go to the (large) trouble of VLAN tagging ARP frames because
2243 * switches in VLAN mode (especially if ports are configured as
2244 * "native" to a VLAN) might not pass non-tagged frames.
2246 static void bond_arp_send(struct net_device
*slave_dev
, int arp_op
,
2247 __be32 dest_ip
, __be32 src_ip
,
2248 struct bond_vlan_tag
*tags
)
2250 struct sk_buff
*skb
;
2251 struct bond_vlan_tag
*outer_tag
= tags
;
2253 netdev_dbg(slave_dev
, "arp %d on slave %s: dst %pI4 src %pI4\n",
2254 arp_op
, slave_dev
->name
, &dest_ip
, &src_ip
);
2256 skb
= arp_create(arp_op
, ETH_P_ARP
, dest_ip
, slave_dev
, src_ip
,
2257 NULL
, slave_dev
->dev_addr
, NULL
);
2260 net_err_ratelimited("ARP packet allocation failed\n");
2264 if (!tags
|| tags
->vlan_proto
== VLAN_N_VID
)
2269 /* Go through all the tags backwards and add them to the packet */
2270 while (tags
->vlan_proto
!= VLAN_N_VID
) {
2271 if (!tags
->vlan_id
) {
2276 netdev_dbg(slave_dev
, "inner tag: proto %X vid %X\n",
2277 ntohs(outer_tag
->vlan_proto
), tags
->vlan_id
);
2278 skb
= vlan_insert_tag_set_proto(skb
, tags
->vlan_proto
,
2281 net_err_ratelimited("failed to insert inner VLAN tag\n");
2287 /* Set the outer tag */
2288 if (outer_tag
->vlan_id
) {
2289 netdev_dbg(slave_dev
, "outer tag: proto %X vid %X\n",
2290 ntohs(outer_tag
->vlan_proto
), outer_tag
->vlan_id
);
2291 __vlan_hwaccel_put_tag(skb
, outer_tag
->vlan_proto
,
2292 outer_tag
->vlan_id
);
2299 /* Validate the device path between the @start_dev and the @end_dev.
2300 * The path is valid if the @end_dev is reachable through device
2302 * When the path is validated, collect any vlan information in the
2305 struct bond_vlan_tag
*bond_verify_device_path(struct net_device
*start_dev
,
2306 struct net_device
*end_dev
,
2309 struct bond_vlan_tag
*tags
;
2310 struct net_device
*upper
;
2311 struct list_head
*iter
;
2313 if (start_dev
== end_dev
) {
2314 tags
= kzalloc(sizeof(*tags
) * (level
+ 1), GFP_ATOMIC
);
2316 return ERR_PTR(-ENOMEM
);
2317 tags
[level
].vlan_proto
= VLAN_N_VID
;
2321 netdev_for_each_upper_dev_rcu(start_dev
, upper
, iter
) {
2322 tags
= bond_verify_device_path(upper
, end_dev
, level
+ 1);
2323 if (IS_ERR_OR_NULL(tags
)) {
2328 if (is_vlan_dev(upper
)) {
2329 tags
[level
].vlan_proto
= vlan_dev_vlan_proto(upper
);
2330 tags
[level
].vlan_id
= vlan_dev_vlan_id(upper
);
2339 static void bond_arp_send_all(struct bonding
*bond
, struct slave
*slave
)
2342 struct bond_vlan_tag
*tags
;
2343 __be32
*targets
= bond
->params
.arp_targets
, addr
;
2346 for (i
= 0; i
< BOND_MAX_ARP_TARGETS
&& targets
[i
]; i
++) {
2347 netdev_dbg(bond
->dev
, "basa: target %pI4\n", &targets
[i
]);
2350 /* Find out through which dev should the packet go */
2351 rt
= ip_route_output(dev_net(bond
->dev
), targets
[i
], 0,
2354 /* there's no route to target - try to send arp
2355 * probe to generate any traffic (arp_validate=0)
2357 if (bond
->params
.arp_validate
)
2358 net_warn_ratelimited("%s: no route to arp_ip_target %pI4 and arp_validate is set\n",
2361 bond_arp_send(slave
->dev
, ARPOP_REQUEST
, targets
[i
],
2366 /* bond device itself */
2367 if (rt
->dst
.dev
== bond
->dev
)
2371 tags
= bond_verify_device_path(bond
->dev
, rt
->dst
.dev
, 0);
2374 if (!IS_ERR_OR_NULL(tags
))
2377 /* Not our device - skip */
2378 netdev_dbg(bond
->dev
, "no path to arp_ip_target %pI4 via rt.dev %s\n",
2379 &targets
[i
], rt
->dst
.dev
? rt
->dst
.dev
->name
: "NULL");
2385 addr
= bond_confirm_addr(rt
->dst
.dev
, targets
[i
], 0);
2387 bond_arp_send(slave
->dev
, ARPOP_REQUEST
, targets
[i
],
2393 static void bond_validate_arp(struct bonding
*bond
, struct slave
*slave
, __be32 sip
, __be32 tip
)
2397 if (!sip
|| !bond_has_this_ip(bond
, tip
)) {
2398 netdev_dbg(bond
->dev
, "bva: sip %pI4 tip %pI4 not found\n",
2403 i
= bond_get_targets_ip(bond
->params
.arp_targets
, sip
);
2405 netdev_dbg(bond
->dev
, "bva: sip %pI4 not found in targets\n",
2409 slave
->last_rx
= jiffies
;
2410 slave
->target_last_arp_rx
[i
] = jiffies
;
2413 int bond_arp_rcv(const struct sk_buff
*skb
, struct bonding
*bond
,
2414 struct slave
*slave
)
2416 struct arphdr
*arp
= (struct arphdr
*)skb
->data
;
2417 struct slave
*curr_active_slave
;
2418 unsigned char *arp_ptr
;
2420 int alen
, is_arp
= skb
->protocol
== __cpu_to_be16(ETH_P_ARP
);
2422 if (!slave_do_arp_validate(bond
, slave
)) {
2423 if ((slave_do_arp_validate_only(bond
) && is_arp
) ||
2424 !slave_do_arp_validate_only(bond
))
2425 slave
->last_rx
= jiffies
;
2426 return RX_HANDLER_ANOTHER
;
2427 } else if (!is_arp
) {
2428 return RX_HANDLER_ANOTHER
;
2431 alen
= arp_hdr_len(bond
->dev
);
2433 netdev_dbg(bond
->dev
, "bond_arp_rcv: skb->dev %s\n",
2436 if (alen
> skb_headlen(skb
)) {
2437 arp
= kmalloc(alen
, GFP_ATOMIC
);
2440 if (skb_copy_bits(skb
, 0, arp
, alen
) < 0)
2444 if (arp
->ar_hln
!= bond
->dev
->addr_len
||
2445 skb
->pkt_type
== PACKET_OTHERHOST
||
2446 skb
->pkt_type
== PACKET_LOOPBACK
||
2447 arp
->ar_hrd
!= htons(ARPHRD_ETHER
) ||
2448 arp
->ar_pro
!= htons(ETH_P_IP
) ||
2452 arp_ptr
= (unsigned char *)(arp
+ 1);
2453 arp_ptr
+= bond
->dev
->addr_len
;
2454 memcpy(&sip
, arp_ptr
, 4);
2455 arp_ptr
+= 4 + bond
->dev
->addr_len
;
2456 memcpy(&tip
, arp_ptr
, 4);
2458 netdev_dbg(bond
->dev
, "bond_arp_rcv: %s/%d av %d sv %d sip %pI4 tip %pI4\n",
2459 slave
->dev
->name
, bond_slave_state(slave
),
2460 bond
->params
.arp_validate
, slave_do_arp_validate(bond
, slave
),
2463 curr_active_slave
= rcu_dereference(bond
->curr_active_slave
);
2465 /* Backup slaves won't see the ARP reply, but do come through
2466 * here for each ARP probe (so we swap the sip/tip to validate
2467 * the probe). In a "redundant switch, common router" type of
2468 * configuration, the ARP probe will (hopefully) travel from
2469 * the active, through one switch, the router, then the other
2470 * switch before reaching the backup.
2472 * We 'trust' the arp requests if there is an active slave and
2473 * it received valid arp reply(s) after it became active. This
2474 * is done to avoid endless looping when we can't reach the
2475 * arp_ip_target and fool ourselves with our own arp requests.
2478 if (bond_is_active_slave(slave
))
2479 bond_validate_arp(bond
, slave
, sip
, tip
);
2480 else if (curr_active_slave
&&
2481 time_after(slave_last_rx(bond
, curr_active_slave
),
2482 curr_active_slave
->last_link_up
))
2483 bond_validate_arp(bond
, slave
, tip
, sip
);
2486 if (arp
!= (struct arphdr
*)skb
->data
)
2488 return RX_HANDLER_ANOTHER
;
2491 /* function to verify if we're in the arp_interval timeslice, returns true if
2492 * (last_act - arp_interval) <= jiffies <= (last_act + mod * arp_interval +
2493 * arp_interval/2) . the arp_interval/2 is needed for really fast networks.
2495 static bool bond_time_in_interval(struct bonding
*bond
, unsigned long last_act
,
2498 int delta_in_ticks
= msecs_to_jiffies(bond
->params
.arp_interval
);
2500 return time_in_range(jiffies
,
2501 last_act
- delta_in_ticks
,
2502 last_act
+ mod
* delta_in_ticks
+ delta_in_ticks
/2);
2505 /* This function is called regularly to monitor each slave's link
2506 * ensuring that traffic is being sent and received when arp monitoring
2507 * is used in load-balancing mode. if the adapter has been dormant, then an
2508 * arp is transmitted to generate traffic. see activebackup_arp_monitor for
2509 * arp monitoring in active backup mode.
2511 static void bond_loadbalance_arp_mon(struct work_struct
*work
)
2513 struct bonding
*bond
= container_of(work
, struct bonding
,
2515 struct slave
*slave
, *oldcurrent
;
2516 struct list_head
*iter
;
2517 int do_failover
= 0, slave_state_changed
= 0;
2519 if (!bond_has_slaves(bond
))
2524 oldcurrent
= rcu_dereference(bond
->curr_active_slave
);
2525 /* see if any of the previous devices are up now (i.e. they have
2526 * xmt and rcv traffic). the curr_active_slave does not come into
2527 * the picture unless it is null. also, slave->last_link_up is not
2528 * needed here because we send an arp on each slave and give a slave
2529 * as long as it needs to get the tx/rx within the delta.
2530 * TODO: what about up/down delay in arp mode? it wasn't here before
2533 bond_for_each_slave_rcu(bond
, slave
, iter
) {
2534 unsigned long trans_start
= dev_trans_start(slave
->dev
);
2536 if (slave
->link
!= BOND_LINK_UP
) {
2537 if (bond_time_in_interval(bond
, trans_start
, 1) &&
2538 bond_time_in_interval(bond
, slave
->last_rx
, 1)) {
2540 slave
->link
= BOND_LINK_UP
;
2541 slave_state_changed
= 1;
2543 /* primary_slave has no meaning in round-robin
2544 * mode. the window of a slave being up and
2545 * curr_active_slave being null after enslaving
2549 netdev_info(bond
->dev
, "link status definitely up for interface %s\n",
2553 netdev_info(bond
->dev
, "interface %s is now up\n",
2558 /* slave->link == BOND_LINK_UP */
2560 /* not all switches will respond to an arp request
2561 * when the source ip is 0, so don't take the link down
2562 * if we don't know our ip yet
2564 if (!bond_time_in_interval(bond
, trans_start
, 2) ||
2565 !bond_time_in_interval(bond
, slave
->last_rx
, 2)) {
2567 slave
->link
= BOND_LINK_DOWN
;
2568 slave_state_changed
= 1;
2570 if (slave
->link_failure_count
< UINT_MAX
)
2571 slave
->link_failure_count
++;
2573 netdev_info(bond
->dev
, "interface %s is now down\n",
2576 if (slave
== oldcurrent
)
2581 /* note: if switch is in round-robin mode, all links
2582 * must tx arp to ensure all links rx an arp - otherwise
2583 * links may oscillate or not come up at all; if switch is
2584 * in something like xor mode, there is nothing we can
2585 * do - all replies will be rx'ed on same link causing slaves
2586 * to be unstable during low/no traffic periods
2588 if (bond_slave_is_up(slave
))
2589 bond_arp_send_all(bond
, slave
);
2594 if (do_failover
|| slave_state_changed
) {
2595 if (!rtnl_trylock())
2598 if (slave_state_changed
) {
2599 bond_slave_state_change(bond
);
2600 if (BOND_MODE(bond
) == BOND_MODE_XOR
)
2601 bond_update_slave_arr(bond
, NULL
);
2605 bond_select_active_slave(bond
);
2606 unblock_netpoll_tx();
2612 if (bond
->params
.arp_interval
)
2613 queue_delayed_work(bond
->wq
, &bond
->arp_work
,
2614 msecs_to_jiffies(bond
->params
.arp_interval
));
2617 /* Called to inspect slaves for active-backup mode ARP monitor link state
2618 * changes. Sets new_link in slaves to specify what action should take
2619 * place for the slave. Returns 0 if no changes are found, >0 if changes
2620 * to link states must be committed.
2622 * Called with rcu_read_lock held.
2624 static int bond_ab_arp_inspect(struct bonding
*bond
)
2626 unsigned long trans_start
, last_rx
;
2627 struct list_head
*iter
;
2628 struct slave
*slave
;
2631 bond_for_each_slave_rcu(bond
, slave
, iter
) {
2632 slave
->new_link
= BOND_LINK_NOCHANGE
;
2633 last_rx
= slave_last_rx(bond
, slave
);
2635 if (slave
->link
!= BOND_LINK_UP
) {
2636 if (bond_time_in_interval(bond
, last_rx
, 1)) {
2637 slave
->new_link
= BOND_LINK_UP
;
2643 /* Give slaves 2*delta after being enslaved or made
2644 * active. This avoids bouncing, as the last receive
2645 * times need a full ARP monitor cycle to be updated.
2647 if (bond_time_in_interval(bond
, slave
->last_link_up
, 2))
2650 /* Backup slave is down if:
2651 * - No current_arp_slave AND
2652 * - more than 3*delta since last receive AND
2653 * - the bond has an IP address
2655 * Note: a non-null current_arp_slave indicates
2656 * the curr_active_slave went down and we are
2657 * searching for a new one; under this condition
2658 * we only take the curr_active_slave down - this
2659 * gives each slave a chance to tx/rx traffic
2660 * before being taken out
2662 if (!bond_is_active_slave(slave
) &&
2663 !rcu_access_pointer(bond
->current_arp_slave
) &&
2664 !bond_time_in_interval(bond
, last_rx
, 3)) {
2665 slave
->new_link
= BOND_LINK_DOWN
;
2669 /* Active slave is down if:
2670 * - more than 2*delta since transmitting OR
2671 * - (more than 2*delta since receive AND
2672 * the bond has an IP address)
2674 trans_start
= dev_trans_start(slave
->dev
);
2675 if (bond_is_active_slave(slave
) &&
2676 (!bond_time_in_interval(bond
, trans_start
, 2) ||
2677 !bond_time_in_interval(bond
, last_rx
, 2))) {
2678 slave
->new_link
= BOND_LINK_DOWN
;
2686 /* Called to commit link state changes noted by inspection step of
2687 * active-backup mode ARP monitor.
2689 * Called with RTNL hold.
2691 static void bond_ab_arp_commit(struct bonding
*bond
)
2693 unsigned long trans_start
;
2694 struct list_head
*iter
;
2695 struct slave
*slave
;
2697 bond_for_each_slave(bond
, slave
, iter
) {
2698 switch (slave
->new_link
) {
2699 case BOND_LINK_NOCHANGE
:
2703 trans_start
= dev_trans_start(slave
->dev
);
2704 if (rtnl_dereference(bond
->curr_active_slave
) != slave
||
2705 (!rtnl_dereference(bond
->curr_active_slave
) &&
2706 bond_time_in_interval(bond
, trans_start
, 1))) {
2707 struct slave
*current_arp_slave
;
2709 current_arp_slave
= rtnl_dereference(bond
->current_arp_slave
);
2710 bond_set_slave_link_state(slave
, BOND_LINK_UP
);
2711 if (current_arp_slave
) {
2712 bond_set_slave_inactive_flags(
2714 BOND_SLAVE_NOTIFY_NOW
);
2715 RCU_INIT_POINTER(bond
->current_arp_slave
, NULL
);
2718 netdev_info(bond
->dev
, "link status definitely up for interface %s\n",
2721 if (!rtnl_dereference(bond
->curr_active_slave
) ||
2722 slave
== rtnl_dereference(bond
->primary_slave
))
2729 case BOND_LINK_DOWN
:
2730 if (slave
->link_failure_count
< UINT_MAX
)
2731 slave
->link_failure_count
++;
2733 bond_set_slave_link_state(slave
, BOND_LINK_DOWN
);
2734 bond_set_slave_inactive_flags(slave
,
2735 BOND_SLAVE_NOTIFY_NOW
);
2737 netdev_info(bond
->dev
, "link status definitely down for interface %s, disabling it\n",
2740 if (slave
== rtnl_dereference(bond
->curr_active_slave
)) {
2741 RCU_INIT_POINTER(bond
->current_arp_slave
, NULL
);
2748 netdev_err(bond
->dev
, "impossible: new_link %d on slave %s\n",
2749 slave
->new_link
, slave
->dev
->name
);
2755 bond_select_active_slave(bond
);
2756 unblock_netpoll_tx();
2759 bond_set_carrier(bond
);
2762 /* Send ARP probes for active-backup mode ARP monitor.
2764 * Called with rcu_read_lock held.
2766 static bool bond_ab_arp_probe(struct bonding
*bond
)
2768 struct slave
*slave
, *before
= NULL
, *new_slave
= NULL
,
2769 *curr_arp_slave
= rcu_dereference(bond
->current_arp_slave
),
2770 *curr_active_slave
= rcu_dereference(bond
->curr_active_slave
);
2771 struct list_head
*iter
;
2773 bool should_notify_rtnl
= BOND_SLAVE_NOTIFY_LATER
;
2775 if (curr_arp_slave
&& curr_active_slave
)
2776 netdev_info(bond
->dev
, "PROBE: c_arp %s && cas %s BAD\n",
2777 curr_arp_slave
->dev
->name
,
2778 curr_active_slave
->dev
->name
);
2780 if (curr_active_slave
) {
2781 bond_arp_send_all(bond
, curr_active_slave
);
2782 return should_notify_rtnl
;
2785 /* if we don't have a curr_active_slave, search for the next available
2786 * backup slave from the current_arp_slave and make it the candidate
2787 * for becoming the curr_active_slave
2790 if (!curr_arp_slave
) {
2791 curr_arp_slave
= bond_first_slave_rcu(bond
);
2792 if (!curr_arp_slave
)
2793 return should_notify_rtnl
;
2796 bond_set_slave_inactive_flags(curr_arp_slave
, BOND_SLAVE_NOTIFY_LATER
);
2798 bond_for_each_slave_rcu(bond
, slave
, iter
) {
2799 if (!found
&& !before
&& bond_slave_is_up(slave
))
2802 if (found
&& !new_slave
&& bond_slave_is_up(slave
))
2804 /* if the link state is up at this point, we
2805 * mark it down - this can happen if we have
2806 * simultaneous link failures and
2807 * reselect_active_interface doesn't make this
2808 * one the current slave so it is still marked
2809 * up when it is actually down
2811 if (!bond_slave_is_up(slave
) && slave
->link
== BOND_LINK_UP
) {
2812 bond_set_slave_link_state(slave
, BOND_LINK_DOWN
);
2813 if (slave
->link_failure_count
< UINT_MAX
)
2814 slave
->link_failure_count
++;
2816 bond_set_slave_inactive_flags(slave
,
2817 BOND_SLAVE_NOTIFY_LATER
);
2819 netdev_info(bond
->dev
, "backup interface %s is now down\n",
2822 if (slave
== curr_arp_slave
)
2826 if (!new_slave
&& before
)
2832 bond_set_slave_link_state(new_slave
, BOND_LINK_BACK
);
2833 bond_set_slave_active_flags(new_slave
, BOND_SLAVE_NOTIFY_LATER
);
2834 bond_arp_send_all(bond
, new_slave
);
2835 new_slave
->last_link_up
= jiffies
;
2836 rcu_assign_pointer(bond
->current_arp_slave
, new_slave
);
2839 bond_for_each_slave_rcu(bond
, slave
, iter
) {
2840 if (slave
->should_notify
) {
2841 should_notify_rtnl
= BOND_SLAVE_NOTIFY_NOW
;
2845 return should_notify_rtnl
;
2848 static void bond_activebackup_arp_mon(struct work_struct
*work
)
2850 struct bonding
*bond
= container_of(work
, struct bonding
,
2852 bool should_notify_peers
= false;
2853 bool should_notify_rtnl
= false;
2856 delta_in_ticks
= msecs_to_jiffies(bond
->params
.arp_interval
);
2858 if (!bond_has_slaves(bond
))
2863 should_notify_peers
= bond_should_notify_peers(bond
);
2865 if (bond_ab_arp_inspect(bond
)) {
2868 /* Race avoidance with bond_close flush of workqueue */
2869 if (!rtnl_trylock()) {
2871 should_notify_peers
= false;
2875 bond_ab_arp_commit(bond
);
2881 should_notify_rtnl
= bond_ab_arp_probe(bond
);
2885 if (bond
->params
.arp_interval
)
2886 queue_delayed_work(bond
->wq
, &bond
->arp_work
, delta_in_ticks
);
2888 if (should_notify_peers
|| should_notify_rtnl
) {
2889 if (!rtnl_trylock())
2892 if (should_notify_peers
)
2893 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS
,
2895 if (should_notify_rtnl
)
2896 bond_slave_state_notify(bond
);
2902 /*-------------------------- netdev event handling --------------------------*/
2904 /* Change device name */
2905 static int bond_event_changename(struct bonding
*bond
)
2907 bond_remove_proc_entry(bond
);
2908 bond_create_proc_entry(bond
);
2910 bond_debug_reregister(bond
);
2915 static int bond_master_netdev_event(unsigned long event
,
2916 struct net_device
*bond_dev
)
2918 struct bonding
*event_bond
= netdev_priv(bond_dev
);
2921 case NETDEV_CHANGENAME
:
2922 return bond_event_changename(event_bond
);
2923 case NETDEV_UNREGISTER
:
2924 bond_remove_proc_entry(event_bond
);
2926 case NETDEV_REGISTER
:
2927 bond_create_proc_entry(event_bond
);
2929 case NETDEV_NOTIFY_PEERS
:
2930 if (event_bond
->send_peer_notif
)
2931 event_bond
->send_peer_notif
--;
2940 static int bond_slave_netdev_event(unsigned long event
,
2941 struct net_device
*slave_dev
)
2943 struct slave
*slave
= bond_slave_get_rtnl(slave_dev
), *primary
;
2944 struct bonding
*bond
;
2945 struct net_device
*bond_dev
;
2949 /* A netdev event can be generated while enslaving a device
2950 * before netdev_rx_handler_register is called in which case
2951 * slave will be NULL
2955 bond_dev
= slave
->bond
->dev
;
2957 primary
= rtnl_dereference(bond
->primary_slave
);
2960 case NETDEV_UNREGISTER
:
2961 if (bond_dev
->type
!= ARPHRD_ETHER
)
2962 bond_release_and_destroy(bond_dev
, slave_dev
);
2964 bond_release(bond_dev
, slave_dev
);
2968 old_speed
= slave
->speed
;
2969 old_duplex
= slave
->duplex
;
2971 bond_update_speed_duplex(slave
);
2973 if (BOND_MODE(bond
) == BOND_MODE_8023AD
) {
2974 if (old_speed
!= slave
->speed
)
2975 bond_3ad_adapter_speed_changed(slave
);
2976 if (old_duplex
!= slave
->duplex
)
2977 bond_3ad_adapter_duplex_changed(slave
);
2981 /* Refresh slave-array if applicable!
2982 * If the setup does not use miimon or arpmon (mode-specific!),
2983 * then these events will not cause the slave-array to be
2984 * refreshed. This will cause xmit to use a slave that is not
2985 * usable. Avoid such situation by refeshing the array at these
2986 * events. If these (miimon/arpmon) parameters are configured
2987 * then array gets refreshed twice and that should be fine!
2989 if (bond_mode_uses_xmit_hash(bond
))
2990 bond_update_slave_arr(bond
, NULL
);
2992 case NETDEV_CHANGEMTU
:
2993 /* TODO: Should slaves be allowed to
2994 * independently alter their MTU? For
2995 * an active-backup bond, slaves need
2996 * not be the same type of device, so
2997 * MTUs may vary. For other modes,
2998 * slaves arguably should have the
2999 * same MTUs. To do this, we'd need to
3000 * take over the slave's change_mtu
3001 * function for the duration of their
3005 case NETDEV_CHANGENAME
:
3006 /* we don't care if we don't have primary set */
3007 if (!bond_uses_primary(bond
) ||
3008 !bond
->params
.primary
[0])
3011 if (slave
== primary
) {
3012 /* slave's name changed - he's no longer primary */
3013 RCU_INIT_POINTER(bond
->primary_slave
, NULL
);
3014 } else if (!strcmp(slave_dev
->name
, bond
->params
.primary
)) {
3015 /* we have a new primary slave */
3016 rcu_assign_pointer(bond
->primary_slave
, slave
);
3017 } else { /* we didn't change primary - exit */
3021 netdev_info(bond
->dev
, "Primary slave changed to %s, reselecting active slave\n",
3022 primary
? slave_dev
->name
: "none");
3025 bond_select_active_slave(bond
);
3026 unblock_netpoll_tx();
3028 case NETDEV_FEAT_CHANGE
:
3029 bond_compute_features(bond
);
3031 case NETDEV_RESEND_IGMP
:
3032 /* Propagate to master device */
3033 call_netdevice_notifiers(event
, slave
->bond
->dev
);
3042 /* bond_netdev_event: handle netdev notifier chain events.
3044 * This function receives events for the netdev chain. The caller (an
3045 * ioctl handler calling blocking_notifier_call_chain) holds the necessary
3046 * locks for us to safely manipulate the slave devices (RTNL lock,
3049 static int bond_netdev_event(struct notifier_block
*this,
3050 unsigned long event
, void *ptr
)
3052 struct net_device
*event_dev
= netdev_notifier_info_to_dev(ptr
);
3054 netdev_dbg(event_dev
, "event: %lx\n", event
);
3056 if (!(event_dev
->priv_flags
& IFF_BONDING
))
3059 if (event_dev
->flags
& IFF_MASTER
) {
3060 netdev_dbg(event_dev
, "IFF_MASTER\n");
3061 return bond_master_netdev_event(event
, event_dev
);
3064 if (event_dev
->flags
& IFF_SLAVE
) {
3065 netdev_dbg(event_dev
, "IFF_SLAVE\n");
3066 return bond_slave_netdev_event(event
, event_dev
);
3072 static struct notifier_block bond_netdev_notifier
= {
3073 .notifier_call
= bond_netdev_event
,
3076 /*---------------------------- Hashing Policies -----------------------------*/
3078 /* L2 hash helper */
3079 static inline u32
bond_eth_hash(struct sk_buff
*skb
)
3081 struct ethhdr
*ep
, hdr_tmp
;
3083 ep
= skb_header_pointer(skb
, 0, sizeof(hdr_tmp
), &hdr_tmp
);
3085 return ep
->h_dest
[5] ^ ep
->h_source
[5] ^ ep
->h_proto
;
3089 /* Extract the appropriate headers based on bond's xmit policy */
3090 static bool bond_flow_dissect(struct bonding
*bond
, struct sk_buff
*skb
,
3091 struct flow_keys
*fk
)
3093 const struct ipv6hdr
*iph6
;
3094 const struct iphdr
*iph
;
3095 int noff
, proto
= -1;
3097 if (bond
->params
.xmit_policy
> BOND_XMIT_POLICY_LAYER23
)
3098 return skb_flow_dissect_flow_keys(skb
, fk
);
3100 fk
->ports
.ports
= 0;
3101 noff
= skb_network_offset(skb
);
3102 if (skb
->protocol
== htons(ETH_P_IP
)) {
3103 if (unlikely(!pskb_may_pull(skb
, noff
+ sizeof(*iph
))))
3106 iph_to_flow_copy_v4addrs(fk
, iph
);
3107 noff
+= iph
->ihl
<< 2;
3108 if (!ip_is_fragment(iph
))
3109 proto
= iph
->protocol
;
3110 } else if (skb
->protocol
== htons(ETH_P_IPV6
)) {
3111 if (unlikely(!pskb_may_pull(skb
, noff
+ sizeof(*iph6
))))
3113 iph6
= ipv6_hdr(skb
);
3114 iph_to_flow_copy_v6addrs(fk
, iph6
);
3115 noff
+= sizeof(*iph6
);
3116 proto
= iph6
->nexthdr
;
3120 if (bond
->params
.xmit_policy
== BOND_XMIT_POLICY_LAYER34
&& proto
>= 0)
3121 fk
->ports
.ports
= skb_flow_get_ports(skb
, noff
, proto
);
3127 * bond_xmit_hash - generate a hash value based on the xmit policy
3128 * @bond: bonding device
3129 * @skb: buffer to use for headers
3131 * This function will extract the necessary headers from the skb buffer and use
3132 * them to generate a hash based on the xmit_policy set in the bonding device
3134 u32
bond_xmit_hash(struct bonding
*bond
, struct sk_buff
*skb
)
3136 struct flow_keys flow
;
3139 if (bond
->params
.xmit_policy
== BOND_XMIT_POLICY_LAYER2
||
3140 !bond_flow_dissect(bond
, skb
, &flow
))
3141 return bond_eth_hash(skb
);
3143 if (bond
->params
.xmit_policy
== BOND_XMIT_POLICY_LAYER23
||
3144 bond
->params
.xmit_policy
== BOND_XMIT_POLICY_ENCAP23
)
3145 hash
= bond_eth_hash(skb
);
3147 hash
= (__force u32
)flow
.ports
.ports
;
3148 hash
^= (__force u32
)flow_get_u32_dst(&flow
) ^
3149 (__force u32
)flow_get_u32_src(&flow
);
3150 hash
^= (hash
>> 16);
3151 hash
^= (hash
>> 8);
3156 /*-------------------------- Device entry points ----------------------------*/
3158 static void bond_work_init_all(struct bonding
*bond
)
3160 INIT_DELAYED_WORK(&bond
->mcast_work
,
3161 bond_resend_igmp_join_requests_delayed
);
3162 INIT_DELAYED_WORK(&bond
->alb_work
, bond_alb_monitor
);
3163 INIT_DELAYED_WORK(&bond
->mii_work
, bond_mii_monitor
);
3164 if (BOND_MODE(bond
) == BOND_MODE_ACTIVEBACKUP
)
3165 INIT_DELAYED_WORK(&bond
->arp_work
, bond_activebackup_arp_mon
);
3167 INIT_DELAYED_WORK(&bond
->arp_work
, bond_loadbalance_arp_mon
);
3168 INIT_DELAYED_WORK(&bond
->ad_work
, bond_3ad_state_machine_handler
);
3169 INIT_DELAYED_WORK(&bond
->slave_arr_work
, bond_slave_arr_handler
);
3172 static void bond_work_cancel_all(struct bonding
*bond
)
3174 cancel_delayed_work_sync(&bond
->mii_work
);
3175 cancel_delayed_work_sync(&bond
->arp_work
);
3176 cancel_delayed_work_sync(&bond
->alb_work
);
3177 cancel_delayed_work_sync(&bond
->ad_work
);
3178 cancel_delayed_work_sync(&bond
->mcast_work
);
3179 cancel_delayed_work_sync(&bond
->slave_arr_work
);
3182 static int bond_open(struct net_device
*bond_dev
)
3184 struct bonding
*bond
= netdev_priv(bond_dev
);
3185 struct list_head
*iter
;
3186 struct slave
*slave
;
3188 /* reset slave->backup and slave->inactive */
3189 if (bond_has_slaves(bond
)) {
3190 bond_for_each_slave(bond
, slave
, iter
) {
3191 if (bond_uses_primary(bond
) &&
3192 slave
!= rcu_access_pointer(bond
->curr_active_slave
)) {
3193 bond_set_slave_inactive_flags(slave
,
3194 BOND_SLAVE_NOTIFY_NOW
);
3195 } else if (BOND_MODE(bond
) != BOND_MODE_8023AD
) {
3196 bond_set_slave_active_flags(slave
,
3197 BOND_SLAVE_NOTIFY_NOW
);
3202 bond_work_init_all(bond
);
3204 if (bond_is_lb(bond
)) {
3205 /* bond_alb_initialize must be called before the timer
3208 if (bond_alb_initialize(bond
, (BOND_MODE(bond
) == BOND_MODE_ALB
)))
3210 if (bond
->params
.tlb_dynamic_lb
)
3211 queue_delayed_work(bond
->wq
, &bond
->alb_work
, 0);
3214 if (bond
->params
.miimon
) /* link check interval, in milliseconds. */
3215 queue_delayed_work(bond
->wq
, &bond
->mii_work
, 0);
3217 if (bond
->params
.arp_interval
) { /* arp interval, in milliseconds. */
3218 queue_delayed_work(bond
->wq
, &bond
->arp_work
, 0);
3219 bond
->recv_probe
= bond_arp_rcv
;
3222 if (BOND_MODE(bond
) == BOND_MODE_8023AD
) {
3223 queue_delayed_work(bond
->wq
, &bond
->ad_work
, 0);
3224 /* register to receive LACPDUs */
3225 bond
->recv_probe
= bond_3ad_lacpdu_recv
;
3226 bond_3ad_initiate_agg_selection(bond
, 1);
3229 if (bond_mode_uses_xmit_hash(bond
))
3230 bond_update_slave_arr(bond
, NULL
);
3235 static int bond_close(struct net_device
*bond_dev
)
3237 struct bonding
*bond
= netdev_priv(bond_dev
);
3239 bond_work_cancel_all(bond
);
3240 bond
->send_peer_notif
= 0;
3241 if (bond_is_lb(bond
))
3242 bond_alb_deinitialize(bond
);
3243 bond
->recv_probe
= NULL
;
3248 static struct rtnl_link_stats64
*bond_get_stats(struct net_device
*bond_dev
,
3249 struct rtnl_link_stats64
*stats
)
3251 struct bonding
*bond
= netdev_priv(bond_dev
);
3252 struct rtnl_link_stats64 temp
;
3253 struct list_head
*iter
;
3254 struct slave
*slave
;
3256 memcpy(stats
, &bond
->bond_stats
, sizeof(*stats
));
3258 bond_for_each_slave(bond
, slave
, iter
) {
3259 const struct rtnl_link_stats64
*sstats
=
3260 dev_get_stats(slave
->dev
, &temp
);
3261 struct rtnl_link_stats64
*pstats
= &slave
->slave_stats
;
3263 stats
->rx_packets
+= sstats
->rx_packets
- pstats
->rx_packets
;
3264 stats
->rx_bytes
+= sstats
->rx_bytes
- pstats
->rx_bytes
;
3265 stats
->rx_errors
+= sstats
->rx_errors
- pstats
->rx_errors
;
3266 stats
->rx_dropped
+= sstats
->rx_dropped
- pstats
->rx_dropped
;
3268 stats
->tx_packets
+= sstats
->tx_packets
- pstats
->tx_packets
;;
3269 stats
->tx_bytes
+= sstats
->tx_bytes
- pstats
->tx_bytes
;
3270 stats
->tx_errors
+= sstats
->tx_errors
- pstats
->tx_errors
;
3271 stats
->tx_dropped
+= sstats
->tx_dropped
- pstats
->tx_dropped
;
3273 stats
->multicast
+= sstats
->multicast
- pstats
->multicast
;
3274 stats
->collisions
+= sstats
->collisions
- pstats
->collisions
;
3276 stats
->rx_length_errors
+= sstats
->rx_length_errors
- pstats
->rx_length_errors
;
3277 stats
->rx_over_errors
+= sstats
->rx_over_errors
- pstats
->rx_over_errors
;
3278 stats
->rx_crc_errors
+= sstats
->rx_crc_errors
- pstats
->rx_crc_errors
;
3279 stats
->rx_frame_errors
+= sstats
->rx_frame_errors
- pstats
->rx_frame_errors
;
3280 stats
->rx_fifo_errors
+= sstats
->rx_fifo_errors
- pstats
->rx_fifo_errors
;
3281 stats
->rx_missed_errors
+= sstats
->rx_missed_errors
- pstats
->rx_missed_errors
;
3283 stats
->tx_aborted_errors
+= sstats
->tx_aborted_errors
- pstats
->tx_aborted_errors
;
3284 stats
->tx_carrier_errors
+= sstats
->tx_carrier_errors
- pstats
->tx_carrier_errors
;
3285 stats
->tx_fifo_errors
+= sstats
->tx_fifo_errors
- pstats
->tx_fifo_errors
;
3286 stats
->tx_heartbeat_errors
+= sstats
->tx_heartbeat_errors
- pstats
->tx_heartbeat_errors
;
3287 stats
->tx_window_errors
+= sstats
->tx_window_errors
- pstats
->tx_window_errors
;
3289 /* save off the slave stats for the next run */
3290 memcpy(pstats
, sstats
, sizeof(*sstats
));
3292 memcpy(&bond
->bond_stats
, stats
, sizeof(*stats
));
3297 static int bond_do_ioctl(struct net_device
*bond_dev
, struct ifreq
*ifr
, int cmd
)
3299 struct bonding
*bond
= netdev_priv(bond_dev
);
3300 struct net_device
*slave_dev
= NULL
;
3301 struct ifbond k_binfo
;
3302 struct ifbond __user
*u_binfo
= NULL
;
3303 struct ifslave k_sinfo
;
3304 struct ifslave __user
*u_sinfo
= NULL
;
3305 struct mii_ioctl_data
*mii
= NULL
;
3306 struct bond_opt_value newval
;
3310 netdev_dbg(bond_dev
, "bond_ioctl: cmd=%d\n", cmd
);
3321 /* We do this again just in case we were called by SIOCGMIIREG
3322 * instead of SIOCGMIIPHY.
3328 if (mii
->reg_num
== 1) {
3330 if (netif_carrier_ok(bond
->dev
))
3331 mii
->val_out
= BMSR_LSTATUS
;
3335 case BOND_INFO_QUERY_OLD
:
3336 case SIOCBONDINFOQUERY
:
3337 u_binfo
= (struct ifbond __user
*)ifr
->ifr_data
;
3339 if (copy_from_user(&k_binfo
, u_binfo
, sizeof(ifbond
)))
3342 res
= bond_info_query(bond_dev
, &k_binfo
);
3344 copy_to_user(u_binfo
, &k_binfo
, sizeof(ifbond
)))
3348 case BOND_SLAVE_INFO_QUERY_OLD
:
3349 case SIOCBONDSLAVEINFOQUERY
:
3350 u_sinfo
= (struct ifslave __user
*)ifr
->ifr_data
;
3352 if (copy_from_user(&k_sinfo
, u_sinfo
, sizeof(ifslave
)))
3355 res
= bond_slave_info_query(bond_dev
, &k_sinfo
);
3357 copy_to_user(u_sinfo
, &k_sinfo
, sizeof(ifslave
)))
3365 net
= dev_net(bond_dev
);
3367 if (!ns_capable(net
->user_ns
, CAP_NET_ADMIN
))
3370 slave_dev
= __dev_get_by_name(net
, ifr
->ifr_slave
);
3372 netdev_dbg(bond_dev
, "slave_dev=%p:\n", slave_dev
);
3377 netdev_dbg(bond_dev
, "slave_dev->name=%s:\n", slave_dev
->name
);
3379 case BOND_ENSLAVE_OLD
:
3380 case SIOCBONDENSLAVE
:
3381 res
= bond_enslave(bond_dev
, slave_dev
);
3383 case BOND_RELEASE_OLD
:
3384 case SIOCBONDRELEASE
:
3385 res
= bond_release(bond_dev
, slave_dev
);
3387 case BOND_SETHWADDR_OLD
:
3388 case SIOCBONDSETHWADDR
:
3389 bond_set_dev_addr(bond_dev
, slave_dev
);
3392 case BOND_CHANGE_ACTIVE_OLD
:
3393 case SIOCBONDCHANGEACTIVE
:
3394 bond_opt_initstr(&newval
, slave_dev
->name
);
3395 res
= __bond_opt_set(bond
, BOND_OPT_ACTIVE_SLAVE
, &newval
);
3404 static void bond_change_rx_flags(struct net_device
*bond_dev
, int change
)
3406 struct bonding
*bond
= netdev_priv(bond_dev
);
3408 if (change
& IFF_PROMISC
)
3409 bond_set_promiscuity(bond
,
3410 bond_dev
->flags
& IFF_PROMISC
? 1 : -1);
3412 if (change
& IFF_ALLMULTI
)
3413 bond_set_allmulti(bond
,
3414 bond_dev
->flags
& IFF_ALLMULTI
? 1 : -1);
3417 static void bond_set_rx_mode(struct net_device
*bond_dev
)
3419 struct bonding
*bond
= netdev_priv(bond_dev
);
3420 struct list_head
*iter
;
3421 struct slave
*slave
;
3424 if (bond_uses_primary(bond
)) {
3425 slave
= rcu_dereference(bond
->curr_active_slave
);
3427 dev_uc_sync(slave
->dev
, bond_dev
);
3428 dev_mc_sync(slave
->dev
, bond_dev
);
3431 bond_for_each_slave_rcu(bond
, slave
, iter
) {
3432 dev_uc_sync_multiple(slave
->dev
, bond_dev
);
3433 dev_mc_sync_multiple(slave
->dev
, bond_dev
);
3439 static int bond_neigh_init(struct neighbour
*n
)
3441 struct bonding
*bond
= netdev_priv(n
->dev
);
3442 const struct net_device_ops
*slave_ops
;
3443 struct neigh_parms parms
;
3444 struct slave
*slave
;
3447 slave
= bond_first_slave(bond
);
3450 slave_ops
= slave
->dev
->netdev_ops
;
3451 if (!slave_ops
->ndo_neigh_setup
)
3454 parms
.neigh_setup
= NULL
;
3455 parms
.neigh_cleanup
= NULL
;
3456 ret
= slave_ops
->ndo_neigh_setup(slave
->dev
, &parms
);
3460 /* Assign slave's neigh_cleanup to neighbour in case cleanup is called
3461 * after the last slave has been detached. Assumes that all slaves
3462 * utilize the same neigh_cleanup (true at this writing as only user
3465 n
->parms
->neigh_cleanup
= parms
.neigh_cleanup
;
3467 if (!parms
.neigh_setup
)
3470 return parms
.neigh_setup(n
);
3473 /* The bonding ndo_neigh_setup is called at init time beofre any
3474 * slave exists. So we must declare proxy setup function which will
3475 * be used at run time to resolve the actual slave neigh param setup.
3477 * It's also called by master devices (such as vlans) to setup their
3478 * underlying devices. In that case - do nothing, we're already set up from
3481 static int bond_neigh_setup(struct net_device
*dev
,
3482 struct neigh_parms
*parms
)
3484 /* modify only our neigh_parms */
3485 if (parms
->dev
== dev
)
3486 parms
->neigh_setup
= bond_neigh_init
;
3491 /* Change the MTU of all of a master's slaves to match the master */
3492 static int bond_change_mtu(struct net_device
*bond_dev
, int new_mtu
)
3494 struct bonding
*bond
= netdev_priv(bond_dev
);
3495 struct slave
*slave
, *rollback_slave
;
3496 struct list_head
*iter
;
3499 netdev_dbg(bond_dev
, "bond=%p, new_mtu=%d\n", bond
, new_mtu
);
3501 bond_for_each_slave(bond
, slave
, iter
) {
3502 netdev_dbg(bond_dev
, "s %p c_m %p\n",
3503 slave
, slave
->dev
->netdev_ops
->ndo_change_mtu
);
3505 res
= dev_set_mtu(slave
->dev
, new_mtu
);
3508 /* If we failed to set the slave's mtu to the new value
3509 * we must abort the operation even in ACTIVE_BACKUP
3510 * mode, because if we allow the backup slaves to have
3511 * different mtu values than the active slave we'll
3512 * need to change their mtu when doing a failover. That
3513 * means changing their mtu from timer context, which
3514 * is probably not a good idea.
3516 netdev_dbg(bond_dev
, "err %d %s\n", res
,
3522 bond_dev
->mtu
= new_mtu
;
3527 /* unwind from head to the slave that failed */
3528 bond_for_each_slave(bond
, rollback_slave
, iter
) {
3531 if (rollback_slave
== slave
)
3534 tmp_res
= dev_set_mtu(rollback_slave
->dev
, bond_dev
->mtu
);
3536 netdev_dbg(bond_dev
, "unwind err %d dev %s\n",
3537 tmp_res
, rollback_slave
->dev
->name
);
3544 /* Change HW address
3546 * Note that many devices must be down to change the HW address, and
3547 * downing the master releases all slaves. We can make bonds full of
3548 * bonding devices to test this, however.
3550 static int bond_set_mac_address(struct net_device
*bond_dev
, void *addr
)
3552 struct bonding
*bond
= netdev_priv(bond_dev
);
3553 struct slave
*slave
, *rollback_slave
;
3554 struct sockaddr
*sa
= addr
, tmp_sa
;
3555 struct list_head
*iter
;
3558 if (BOND_MODE(bond
) == BOND_MODE_ALB
)
3559 return bond_alb_set_mac_address(bond_dev
, addr
);
3562 netdev_dbg(bond_dev
, "bond=%p\n", bond
);
3564 /* If fail_over_mac is enabled, do nothing and return success.
3565 * Returning an error causes ifenslave to fail.
3567 if (bond
->params
.fail_over_mac
&&
3568 BOND_MODE(bond
) == BOND_MODE_ACTIVEBACKUP
)
3571 if (!is_valid_ether_addr(sa
->sa_data
))
3572 return -EADDRNOTAVAIL
;
3574 bond_for_each_slave(bond
, slave
, iter
) {
3575 netdev_dbg(bond_dev
, "slave %p %s\n", slave
, slave
->dev
->name
);
3576 res
= dev_set_mac_address(slave
->dev
, addr
);
3578 /* TODO: consider downing the slave
3580 * User should expect communications
3581 * breakage anyway until ARP finish
3584 netdev_dbg(bond_dev
, "err %d %s\n", res
, slave
->dev
->name
);
3590 memcpy(bond_dev
->dev_addr
, sa
->sa_data
, bond_dev
->addr_len
);
3594 memcpy(tmp_sa
.sa_data
, bond_dev
->dev_addr
, bond_dev
->addr_len
);
3595 tmp_sa
.sa_family
= bond_dev
->type
;
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_mac_address(rollback_slave
->dev
, &tmp_sa
);
3606 netdev_dbg(bond_dev
, "unwind err %d dev %s\n",
3607 tmp_res
, rollback_slave
->dev
->name
);
3615 * bond_xmit_slave_id - transmit skb through slave with slave_id
3616 * @bond: bonding device that is transmitting
3617 * @skb: buffer to transmit
3618 * @slave_id: slave id up to slave_cnt-1 through which to transmit
3620 * This function tries to transmit through slave with slave_id but in case
3621 * it fails, it tries to find the first available slave for transmission.
3622 * The skb is consumed in all cases, thus the function is void.
3624 static void bond_xmit_slave_id(struct bonding
*bond
, struct sk_buff
*skb
, int slave_id
)
3626 struct list_head
*iter
;
3627 struct slave
*slave
;
3630 /* Here we start from the slave with slave_id */
3631 bond_for_each_slave_rcu(bond
, slave
, iter
) {
3633 if (bond_slave_can_tx(slave
)) {
3634 bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
3640 /* Here we start from the first slave up to slave_id */
3642 bond_for_each_slave_rcu(bond
, slave
, iter
) {
3645 if (bond_slave_can_tx(slave
)) {
3646 bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
3650 /* no slave that can tx has been found */
3651 bond_tx_drop(bond
->dev
, skb
);
3655 * bond_rr_gen_slave_id - generate slave id based on packets_per_slave
3656 * @bond: bonding device to use
3658 * Based on the value of the bonding device's packets_per_slave parameter
3659 * this function generates a slave id, which is usually used as the next
3660 * slave to transmit through.
3662 static u32
bond_rr_gen_slave_id(struct bonding
*bond
)
3665 struct reciprocal_value reciprocal_packets_per_slave
;
3666 int packets_per_slave
= bond
->params
.packets_per_slave
;
3668 switch (packets_per_slave
) {
3670 slave_id
= prandom_u32();
3673 slave_id
= bond
->rr_tx_counter
;
3676 reciprocal_packets_per_slave
=
3677 bond
->params
.reciprocal_packets_per_slave
;
3678 slave_id
= reciprocal_divide(bond
->rr_tx_counter
,
3679 reciprocal_packets_per_slave
);
3682 bond
->rr_tx_counter
++;
3687 static int bond_xmit_roundrobin(struct sk_buff
*skb
, struct net_device
*bond_dev
)
3689 struct bonding
*bond
= netdev_priv(bond_dev
);
3690 struct iphdr
*iph
= ip_hdr(skb
);
3691 struct slave
*slave
;
3694 /* Start with the curr_active_slave that joined the bond as the
3695 * default for sending IGMP traffic. For failover purposes one
3696 * needs to maintain some consistency for the interface that will
3697 * send the join/membership reports. The curr_active_slave found
3698 * will send all of this type of traffic.
3700 if (iph
->protocol
== IPPROTO_IGMP
&& skb
->protocol
== htons(ETH_P_IP
)) {
3701 slave
= rcu_dereference(bond
->curr_active_slave
);
3703 bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
3705 bond_xmit_slave_id(bond
, skb
, 0);
3707 int slave_cnt
= ACCESS_ONCE(bond
->slave_cnt
);
3709 if (likely(slave_cnt
)) {
3710 slave_id
= bond_rr_gen_slave_id(bond
);
3711 bond_xmit_slave_id(bond
, skb
, slave_id
% slave_cnt
);
3713 bond_tx_drop(bond_dev
, skb
);
3717 return NETDEV_TX_OK
;
3720 /* In active-backup mode, we know that bond->curr_active_slave is always valid if
3721 * the bond has a usable interface.
3723 static int bond_xmit_activebackup(struct sk_buff
*skb
, struct net_device
*bond_dev
)
3725 struct bonding
*bond
= netdev_priv(bond_dev
);
3726 struct slave
*slave
;
3728 slave
= rcu_dereference(bond
->curr_active_slave
);
3730 bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
3732 bond_tx_drop(bond_dev
, skb
);
3734 return NETDEV_TX_OK
;
3737 /* Use this to update slave_array when (a) it's not appropriate to update
3738 * slave_array right away (note that update_slave_array() may sleep)
3739 * and / or (b) RTNL is not held.
3741 void bond_slave_arr_work_rearm(struct bonding
*bond
, unsigned long delay
)
3743 queue_delayed_work(bond
->wq
, &bond
->slave_arr_work
, delay
);
3746 /* Slave array work handler. Holds only RTNL */
3747 static void bond_slave_arr_handler(struct work_struct
*work
)
3749 struct bonding
*bond
= container_of(work
, struct bonding
,
3750 slave_arr_work
.work
);
3753 if (!rtnl_trylock())
3756 ret
= bond_update_slave_arr(bond
, NULL
);
3759 pr_warn_ratelimited("Failed to update slave array from WT\n");
3765 bond_slave_arr_work_rearm(bond
, 1);
3768 /* Build the usable slaves array in control path for modes that use xmit-hash
3769 * to determine the slave interface -
3770 * (a) BOND_MODE_8023AD
3772 * (c) BOND_MODE_TLB && tlb_dynamic_lb == 0
3774 * The caller is expected to hold RTNL only and NO other lock!
3776 int bond_update_slave_arr(struct bonding
*bond
, struct slave
*skipslave
)
3778 struct slave
*slave
;
3779 struct list_head
*iter
;
3780 struct bond_up_slave
*new_arr
, *old_arr
;
3784 #ifdef CONFIG_LOCKDEP
3785 WARN_ON(lockdep_is_held(&bond
->mode_lock
));
3788 new_arr
= kzalloc(offsetof(struct bond_up_slave
, arr
[bond
->slave_cnt
]),
3792 pr_err("Failed to build slave-array.\n");
3795 if (BOND_MODE(bond
) == BOND_MODE_8023AD
) {
3796 struct ad_info ad_info
;
3798 if (bond_3ad_get_active_agg_info(bond
, &ad_info
)) {
3799 pr_debug("bond_3ad_get_active_agg_info failed\n");
3800 kfree_rcu(new_arr
, rcu
);
3801 /* No active aggragator means it's not safe to use
3802 * the previous array.
3804 old_arr
= rtnl_dereference(bond
->slave_arr
);
3806 RCU_INIT_POINTER(bond
->slave_arr
, NULL
);
3807 kfree_rcu(old_arr
, rcu
);
3811 agg_id
= ad_info
.aggregator_id
;
3813 bond_for_each_slave(bond
, slave
, iter
) {
3814 if (BOND_MODE(bond
) == BOND_MODE_8023AD
) {
3815 struct aggregator
*agg
;
3817 agg
= SLAVE_AD_INFO(slave
)->port
.aggregator
;
3818 if (!agg
|| agg
->aggregator_identifier
!= agg_id
)
3821 if (!bond_slave_can_tx(slave
))
3823 if (skipslave
== slave
)
3825 new_arr
->arr
[new_arr
->count
++] = slave
;
3828 old_arr
= rtnl_dereference(bond
->slave_arr
);
3829 rcu_assign_pointer(bond
->slave_arr
, new_arr
);
3831 kfree_rcu(old_arr
, rcu
);
3833 if (ret
!= 0 && skipslave
) {
3836 /* Rare situation where caller has asked to skip a specific
3837 * slave but allocation failed (most likely!). BTW this is
3838 * only possible when the call is initiated from
3839 * __bond_release_one(). In this situation; overwrite the
3840 * skipslave entry in the array with the last entry from the
3841 * array to avoid a situation where the xmit path may choose
3842 * this to-be-skipped slave to send a packet out.
3844 old_arr
= rtnl_dereference(bond
->slave_arr
);
3845 for (idx
= 0; idx
< old_arr
->count
; idx
++) {
3846 if (skipslave
== old_arr
->arr
[idx
]) {
3848 old_arr
->arr
[old_arr
->count
-1];
3857 /* Use this Xmit function for 3AD as well as XOR modes. The current
3858 * usable slave array is formed in the control path. The xmit function
3859 * just calculates hash and sends the packet out.
3861 static int bond_3ad_xor_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
3863 struct bonding
*bond
= netdev_priv(dev
);
3864 struct slave
*slave
;
3865 struct bond_up_slave
*slaves
;
3868 slaves
= rcu_dereference(bond
->slave_arr
);
3869 count
= slaves
? ACCESS_ONCE(slaves
->count
) : 0;
3870 if (likely(count
)) {
3871 slave
= slaves
->arr
[bond_xmit_hash(bond
, skb
) % count
];
3872 bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
3874 bond_tx_drop(dev
, skb
);
3877 return NETDEV_TX_OK
;
3880 /* in broadcast mode, we send everything to all usable interfaces. */
3881 static int bond_xmit_broadcast(struct sk_buff
*skb
, struct net_device
*bond_dev
)
3883 struct bonding
*bond
= netdev_priv(bond_dev
);
3884 struct slave
*slave
= NULL
;
3885 struct list_head
*iter
;
3887 bond_for_each_slave_rcu(bond
, slave
, iter
) {
3888 if (bond_is_last_slave(bond
, slave
))
3890 if (bond_slave_is_up(slave
) && slave
->link
== BOND_LINK_UP
) {
3891 struct sk_buff
*skb2
= skb_clone(skb
, GFP_ATOMIC
);
3894 net_err_ratelimited("%s: Error: %s: skb_clone() failed\n",
3895 bond_dev
->name
, __func__
);
3898 bond_dev_queue_xmit(bond
, skb2
, slave
->dev
);
3901 if (slave
&& bond_slave_is_up(slave
) && slave
->link
== BOND_LINK_UP
)
3902 bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
3904 bond_tx_drop(bond_dev
, skb
);
3906 return NETDEV_TX_OK
;
3909 /*------------------------- Device initialization ---------------------------*/
3911 /* Lookup the slave that corresponds to a qid */
3912 static inline int bond_slave_override(struct bonding
*bond
,
3913 struct sk_buff
*skb
)
3915 struct slave
*slave
= NULL
;
3916 struct list_head
*iter
;
3918 if (!skb
->queue_mapping
)
3921 /* Find out if any slaves have the same mapping as this skb. */
3922 bond_for_each_slave_rcu(bond
, slave
, iter
) {
3923 if (slave
->queue_id
== skb
->queue_mapping
) {
3924 if (bond_slave_is_up(slave
) &&
3925 slave
->link
== BOND_LINK_UP
) {
3926 bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
3929 /* If the slave isn't UP, use default transmit policy. */
3938 static u16
bond_select_queue(struct net_device
*dev
, struct sk_buff
*skb
,
3939 void *accel_priv
, select_queue_fallback_t fallback
)
3941 /* This helper function exists to help dev_pick_tx get the correct
3942 * destination queue. Using a helper function skips a call to
3943 * skb_tx_hash and will put the skbs in the queue we expect on their
3944 * way down to the bonding driver.
3946 u16 txq
= skb_rx_queue_recorded(skb
) ? skb_get_rx_queue(skb
) : 0;
3948 /* Save the original txq to restore before passing to the driver */
3949 qdisc_skb_cb(skb
)->slave_dev_queue_mapping
= skb
->queue_mapping
;
3951 if (unlikely(txq
>= dev
->real_num_tx_queues
)) {
3953 txq
-= dev
->real_num_tx_queues
;
3954 } while (txq
>= dev
->real_num_tx_queues
);
3959 static netdev_tx_t
__bond_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
3961 struct bonding
*bond
= netdev_priv(dev
);
3963 if (bond_should_override_tx_queue(bond
) &&
3964 !bond_slave_override(bond
, skb
))
3965 return NETDEV_TX_OK
;
3967 switch (BOND_MODE(bond
)) {
3968 case BOND_MODE_ROUNDROBIN
:
3969 return bond_xmit_roundrobin(skb
, dev
);
3970 case BOND_MODE_ACTIVEBACKUP
:
3971 return bond_xmit_activebackup(skb
, dev
);
3972 case BOND_MODE_8023AD
:
3974 return bond_3ad_xor_xmit(skb
, dev
);
3975 case BOND_MODE_BROADCAST
:
3976 return bond_xmit_broadcast(skb
, dev
);
3978 return bond_alb_xmit(skb
, dev
);
3980 return bond_tlb_xmit(skb
, dev
);
3982 /* Should never happen, mode already checked */
3983 netdev_err(dev
, "Unknown bonding mode %d\n", BOND_MODE(bond
));
3985 bond_tx_drop(dev
, skb
);
3986 return NETDEV_TX_OK
;
3990 static netdev_tx_t
bond_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
3992 struct bonding
*bond
= netdev_priv(dev
);
3993 netdev_tx_t ret
= NETDEV_TX_OK
;
3995 /* If we risk deadlock from transmitting this in the
3996 * netpoll path, tell netpoll to queue the frame for later tx
3998 if (unlikely(is_netpoll_tx_blocked(dev
)))
3999 return NETDEV_TX_BUSY
;
4002 if (bond_has_slaves(bond
))
4003 ret
= __bond_start_xmit(skb
, dev
);
4005 bond_tx_drop(dev
, skb
);
4011 static int bond_ethtool_get_settings(struct net_device
*bond_dev
,
4012 struct ethtool_cmd
*ecmd
)
4014 struct bonding
*bond
= netdev_priv(bond_dev
);
4015 unsigned long speed
= 0;
4016 struct list_head
*iter
;
4017 struct slave
*slave
;
4019 ecmd
->duplex
= DUPLEX_UNKNOWN
;
4020 ecmd
->port
= PORT_OTHER
;
4022 /* Since bond_slave_can_tx returns false for all inactive or down slaves, we
4023 * do not need to check mode. Though link speed might not represent
4024 * the true receive or transmit bandwidth (not all modes are symmetric)
4025 * this is an accurate maximum.
4027 bond_for_each_slave(bond
, slave
, iter
) {
4028 if (bond_slave_can_tx(slave
)) {
4029 if (slave
->speed
!= SPEED_UNKNOWN
)
4030 speed
+= slave
->speed
;
4031 if (ecmd
->duplex
== DUPLEX_UNKNOWN
&&
4032 slave
->duplex
!= DUPLEX_UNKNOWN
)
4033 ecmd
->duplex
= slave
->duplex
;
4036 ethtool_cmd_speed_set(ecmd
, speed
? : SPEED_UNKNOWN
);
4041 static void bond_ethtool_get_drvinfo(struct net_device
*bond_dev
,
4042 struct ethtool_drvinfo
*drvinfo
)
4044 strlcpy(drvinfo
->driver
, DRV_NAME
, sizeof(drvinfo
->driver
));
4045 strlcpy(drvinfo
->version
, DRV_VERSION
, sizeof(drvinfo
->version
));
4046 snprintf(drvinfo
->fw_version
, sizeof(drvinfo
->fw_version
), "%d",
4050 static const struct ethtool_ops bond_ethtool_ops
= {
4051 .get_drvinfo
= bond_ethtool_get_drvinfo
,
4052 .get_settings
= bond_ethtool_get_settings
,
4053 .get_link
= ethtool_op_get_link
,
4056 static const struct net_device_ops bond_netdev_ops
= {
4057 .ndo_init
= bond_init
,
4058 .ndo_uninit
= bond_uninit
,
4059 .ndo_open
= bond_open
,
4060 .ndo_stop
= bond_close
,
4061 .ndo_start_xmit
= bond_start_xmit
,
4062 .ndo_select_queue
= bond_select_queue
,
4063 .ndo_get_stats64
= bond_get_stats
,
4064 .ndo_do_ioctl
= bond_do_ioctl
,
4065 .ndo_change_rx_flags
= bond_change_rx_flags
,
4066 .ndo_set_rx_mode
= bond_set_rx_mode
,
4067 .ndo_change_mtu
= bond_change_mtu
,
4068 .ndo_set_mac_address
= bond_set_mac_address
,
4069 .ndo_neigh_setup
= bond_neigh_setup
,
4070 .ndo_vlan_rx_add_vid
= bond_vlan_rx_add_vid
,
4071 .ndo_vlan_rx_kill_vid
= bond_vlan_rx_kill_vid
,
4072 #ifdef CONFIG_NET_POLL_CONTROLLER
4073 .ndo_netpoll_setup
= bond_netpoll_setup
,
4074 .ndo_netpoll_cleanup
= bond_netpoll_cleanup
,
4075 .ndo_poll_controller
= bond_poll_controller
,
4077 .ndo_add_slave
= bond_enslave
,
4078 .ndo_del_slave
= bond_release
,
4079 .ndo_fix_features
= bond_fix_features
,
4080 .ndo_bridge_setlink
= switchdev_port_bridge_setlink
,
4081 .ndo_bridge_getlink
= switchdev_port_bridge_getlink
,
4082 .ndo_bridge_dellink
= switchdev_port_bridge_dellink
,
4083 .ndo_fdb_add
= switchdev_port_fdb_add
,
4084 .ndo_fdb_del
= switchdev_port_fdb_del
,
4085 .ndo_fdb_dump
= switchdev_port_fdb_dump
,
4086 .ndo_features_check
= passthru_features_check
,
4089 static const struct device_type bond_type
= {
4093 static void bond_destructor(struct net_device
*bond_dev
)
4095 struct bonding
*bond
= netdev_priv(bond_dev
);
4097 destroy_workqueue(bond
->wq
);
4098 free_netdev(bond_dev
);
4101 void bond_setup(struct net_device
*bond_dev
)
4103 struct bonding
*bond
= netdev_priv(bond_dev
);
4105 spin_lock_init(&bond
->mode_lock
);
4106 bond
->params
= bonding_defaults
;
4108 /* Initialize pointers */
4109 bond
->dev
= bond_dev
;
4111 /* Initialize the device entry points */
4112 ether_setup(bond_dev
);
4113 bond_dev
->netdev_ops
= &bond_netdev_ops
;
4114 bond_dev
->ethtool_ops
= &bond_ethtool_ops
;
4116 bond_dev
->destructor
= bond_destructor
;
4118 SET_NETDEV_DEVTYPE(bond_dev
, &bond_type
);
4120 /* Initialize the device options */
4121 bond_dev
->flags
|= IFF_MASTER
|IFF_MULTICAST
;
4122 bond_dev
->priv_flags
|= IFF_BONDING
| IFF_UNICAST_FLT
| IFF_NO_QUEUE
;
4123 bond_dev
->priv_flags
&= ~(IFF_XMIT_DST_RELEASE
| IFF_TX_SKB_SHARING
);
4125 /* don't acquire bond device's netif_tx_lock when transmitting */
4126 bond_dev
->features
|= NETIF_F_LLTX
;
4128 /* By default, we declare the bond to be fully
4129 * VLAN hardware accelerated capable. Special
4130 * care is taken in the various xmit functions
4131 * when there are slaves that are not hw accel
4135 /* Don't allow bond devices to change network namespaces. */
4136 bond_dev
->features
|= NETIF_F_NETNS_LOCAL
;
4138 bond_dev
->hw_features
= BOND_VLAN_FEATURES
|
4139 NETIF_F_HW_VLAN_CTAG_TX
|
4140 NETIF_F_HW_VLAN_CTAG_RX
|
4141 NETIF_F_HW_VLAN_CTAG_FILTER
;
4143 bond_dev
->hw_features
&= ~(NETIF_F_ALL_CSUM
& ~NETIF_F_HW_CSUM
);
4144 bond_dev
->hw_features
|= NETIF_F_GSO_ENCAP_ALL
;
4145 bond_dev
->features
|= bond_dev
->hw_features
;
4148 /* Destroy a bonding device.
4149 * Must be under rtnl_lock when this function is called.
4151 static void bond_uninit(struct net_device
*bond_dev
)
4153 struct bonding
*bond
= netdev_priv(bond_dev
);
4154 struct list_head
*iter
;
4155 struct slave
*slave
;
4156 struct bond_up_slave
*arr
;
4158 bond_netpoll_cleanup(bond_dev
);
4160 /* Release the bonded slaves */
4161 bond_for_each_slave(bond
, slave
, iter
)
4162 __bond_release_one(bond_dev
, slave
->dev
, true);
4163 netdev_info(bond_dev
, "Released all slaves\n");
4165 arr
= rtnl_dereference(bond
->slave_arr
);
4167 RCU_INIT_POINTER(bond
->slave_arr
, NULL
);
4168 kfree_rcu(arr
, rcu
);
4171 list_del(&bond
->bond_list
);
4173 bond_debug_unregister(bond
);
4176 /*------------------------- Module initialization ---------------------------*/
4178 static int bond_check_params(struct bond_params
*params
)
4180 int arp_validate_value
, fail_over_mac_value
, primary_reselect_value
, i
;
4181 struct bond_opt_value newval
;
4182 const struct bond_opt_value
*valptr
;
4183 int arp_all_targets_value
;
4184 u16 ad_actor_sys_prio
= 0;
4185 u16 ad_user_port_key
= 0;
4187 /* Convert string parameters. */
4189 bond_opt_initstr(&newval
, mode
);
4190 valptr
= bond_opt_parse(bond_opt_get(BOND_OPT_MODE
), &newval
);
4192 pr_err("Error: Invalid bonding mode \"%s\"\n", mode
);
4195 bond_mode
= valptr
->value
;
4198 if (xmit_hash_policy
) {
4199 if ((bond_mode
!= BOND_MODE_XOR
) &&
4200 (bond_mode
!= BOND_MODE_8023AD
) &&
4201 (bond_mode
!= BOND_MODE_TLB
)) {
4202 pr_info("xmit_hash_policy param is irrelevant in mode %s\n",
4203 bond_mode_name(bond_mode
));
4205 bond_opt_initstr(&newval
, xmit_hash_policy
);
4206 valptr
= bond_opt_parse(bond_opt_get(BOND_OPT_XMIT_HASH
),
4209 pr_err("Error: Invalid xmit_hash_policy \"%s\"\n",
4213 xmit_hashtype
= valptr
->value
;
4218 if (bond_mode
!= BOND_MODE_8023AD
) {
4219 pr_info("lacp_rate param is irrelevant in mode %s\n",
4220 bond_mode_name(bond_mode
));
4222 bond_opt_initstr(&newval
, lacp_rate
);
4223 valptr
= bond_opt_parse(bond_opt_get(BOND_OPT_LACP_RATE
),
4226 pr_err("Error: Invalid lacp rate \"%s\"\n",
4230 lacp_fast
= valptr
->value
;
4235 bond_opt_initstr(&newval
, ad_select
);
4236 valptr
= bond_opt_parse(bond_opt_get(BOND_OPT_AD_SELECT
),
4239 pr_err("Error: Invalid ad_select \"%s\"\n", ad_select
);
4242 params
->ad_select
= valptr
->value
;
4243 if (bond_mode
!= BOND_MODE_8023AD
)
4244 pr_warn("ad_select param only affects 802.3ad mode\n");
4246 params
->ad_select
= BOND_AD_STABLE
;
4249 if (max_bonds
< 0) {
4250 pr_warn("Warning: max_bonds (%d) not in range %d-%d, so it was reset to BOND_DEFAULT_MAX_BONDS (%d)\n",
4251 max_bonds
, 0, INT_MAX
, BOND_DEFAULT_MAX_BONDS
);
4252 max_bonds
= BOND_DEFAULT_MAX_BONDS
;
4256 pr_warn("Warning: miimon module parameter (%d), not in range 0-%d, so it was reset to 0\n",
4262 pr_warn("Warning: updelay module parameter (%d), not in range 0-%d, so it was reset to 0\n",
4267 if (downdelay
< 0) {
4268 pr_warn("Warning: downdelay module parameter (%d), not in range 0-%d, so it was reset to 0\n",
4269 downdelay
, INT_MAX
);
4273 if ((use_carrier
!= 0) && (use_carrier
!= 1)) {
4274 pr_warn("Warning: use_carrier module parameter (%d), not of valid value (0/1), so it was set to 1\n",
4279 if (num_peer_notif
< 0 || num_peer_notif
> 255) {
4280 pr_warn("Warning: num_grat_arp/num_unsol_na (%d) not in range 0-255 so it was reset to 1\n",
4285 /* reset values for 802.3ad/TLB/ALB */
4286 if (!bond_mode_uses_arp(bond_mode
)) {
4288 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");
4289 pr_warn("Forcing miimon to 100msec\n");
4290 miimon
= BOND_DEFAULT_MIIMON
;
4294 if (tx_queues
< 1 || tx_queues
> 255) {
4295 pr_warn("Warning: tx_queues (%d) should be between 1 and 255, resetting to %d\n",
4296 tx_queues
, BOND_DEFAULT_TX_QUEUES
);
4297 tx_queues
= BOND_DEFAULT_TX_QUEUES
;
4300 if ((all_slaves_active
!= 0) && (all_slaves_active
!= 1)) {
4301 pr_warn("Warning: all_slaves_active module parameter (%d), not of valid value (0/1), so it was set to 0\n",
4303 all_slaves_active
= 0;
4306 if (resend_igmp
< 0 || resend_igmp
> 255) {
4307 pr_warn("Warning: resend_igmp (%d) should be between 0 and 255, resetting to %d\n",
4308 resend_igmp
, BOND_DEFAULT_RESEND_IGMP
);
4309 resend_igmp
= BOND_DEFAULT_RESEND_IGMP
;
4312 bond_opt_initval(&newval
, packets_per_slave
);
4313 if (!bond_opt_parse(bond_opt_get(BOND_OPT_PACKETS_PER_SLAVE
), &newval
)) {
4314 pr_warn("Warning: packets_per_slave (%d) should be between 0 and %u resetting to 1\n",
4315 packets_per_slave
, USHRT_MAX
);
4316 packets_per_slave
= 1;
4319 if (bond_mode
== BOND_MODE_ALB
) {
4320 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",
4325 if (updelay
|| downdelay
) {
4326 /* just warn the user the up/down delay will have
4327 * no effect since miimon is zero...
4329 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",
4330 updelay
, downdelay
);
4333 /* don't allow arp monitoring */
4335 pr_warn("Warning: miimon (%d) and arp_interval (%d) can't be used simultaneously, disabling ARP monitoring\n",
4336 miimon
, arp_interval
);
4340 if ((updelay
% miimon
) != 0) {
4341 pr_warn("Warning: updelay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
4342 updelay
, miimon
, (updelay
/ miimon
) * miimon
);
4347 if ((downdelay
% miimon
) != 0) {
4348 pr_warn("Warning: downdelay (%d) is not a multiple of miimon (%d), downdelay rounded to %d ms\n",
4350 (downdelay
/ miimon
) * miimon
);
4353 downdelay
/= miimon
;
4356 if (arp_interval
< 0) {
4357 pr_warn("Warning: arp_interval module parameter (%d), not in range 0-%d, so it was reset to 0\n",
4358 arp_interval
, INT_MAX
);
4362 for (arp_ip_count
= 0, i
= 0;
4363 (arp_ip_count
< BOND_MAX_ARP_TARGETS
) && arp_ip_target
[i
]; i
++) {
4366 /* not a complete check, but good enough to catch mistakes */
4367 if (!in4_pton(arp_ip_target
[i
], -1, (u8
*)&ip
, -1, NULL
) ||
4368 !bond_is_ip_target_ok(ip
)) {
4369 pr_warn("Warning: bad arp_ip_target module parameter (%s), ARP monitoring will not be performed\n",
4373 if (bond_get_targets_ip(arp_target
, ip
) == -1)
4374 arp_target
[arp_ip_count
++] = ip
;
4376 pr_warn("Warning: duplicate address %pI4 in arp_ip_target, skipping\n",
4381 if (arp_interval
&& !arp_ip_count
) {
4382 /* don't allow arping if no arp_ip_target given... */
4383 pr_warn("Warning: arp_interval module parameter (%d) specified without providing an arp_ip_target parameter, arp_interval was reset to 0\n",
4389 if (!arp_interval
) {
4390 pr_err("arp_validate requires arp_interval\n");
4394 bond_opt_initstr(&newval
, arp_validate
);
4395 valptr
= bond_opt_parse(bond_opt_get(BOND_OPT_ARP_VALIDATE
),
4398 pr_err("Error: invalid arp_validate \"%s\"\n",
4402 arp_validate_value
= valptr
->value
;
4404 arp_validate_value
= 0;
4407 arp_all_targets_value
= 0;
4408 if (arp_all_targets
) {
4409 bond_opt_initstr(&newval
, arp_all_targets
);
4410 valptr
= bond_opt_parse(bond_opt_get(BOND_OPT_ARP_ALL_TARGETS
),
4413 pr_err("Error: invalid arp_all_targets_value \"%s\"\n",
4415 arp_all_targets_value
= 0;
4417 arp_all_targets_value
= valptr
->value
;
4422 pr_info("MII link monitoring set to %d ms\n", miimon
);
4423 } else if (arp_interval
) {
4424 valptr
= bond_opt_get_val(BOND_OPT_ARP_VALIDATE
,
4425 arp_validate_value
);
4426 pr_info("ARP monitoring set to %d ms, validate %s, with %d target(s):",
4427 arp_interval
, valptr
->string
, arp_ip_count
);
4429 for (i
= 0; i
< arp_ip_count
; i
++)
4430 pr_cont(" %s", arp_ip_target
[i
]);
4434 } else if (max_bonds
) {
4435 /* miimon and arp_interval not set, we need one so things
4436 * work as expected, see bonding.txt for details
4438 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");
4441 if (primary
&& !bond_mode_uses_primary(bond_mode
)) {
4442 /* currently, using a primary only makes sense
4443 * in active backup, TLB or ALB modes
4445 pr_warn("Warning: %s primary device specified but has no effect in %s mode\n",
4446 primary
, bond_mode_name(bond_mode
));
4450 if (primary
&& primary_reselect
) {
4451 bond_opt_initstr(&newval
, primary_reselect
);
4452 valptr
= bond_opt_parse(bond_opt_get(BOND_OPT_PRIMARY_RESELECT
),
4455 pr_err("Error: Invalid primary_reselect \"%s\"\n",
4459 primary_reselect_value
= valptr
->value
;
4461 primary_reselect_value
= BOND_PRI_RESELECT_ALWAYS
;
4464 if (fail_over_mac
) {
4465 bond_opt_initstr(&newval
, fail_over_mac
);
4466 valptr
= bond_opt_parse(bond_opt_get(BOND_OPT_FAIL_OVER_MAC
),
4469 pr_err("Error: invalid fail_over_mac \"%s\"\n",
4473 fail_over_mac_value
= valptr
->value
;
4474 if (bond_mode
!= BOND_MODE_ACTIVEBACKUP
)
4475 pr_warn("Warning: fail_over_mac only affects active-backup mode\n");
4477 fail_over_mac_value
= BOND_FOM_NONE
;
4480 bond_opt_initstr(&newval
, "default");
4481 valptr
= bond_opt_parse(
4482 bond_opt_get(BOND_OPT_AD_ACTOR_SYS_PRIO
),
4485 pr_err("Error: No ad_actor_sys_prio default value");
4488 ad_actor_sys_prio
= valptr
->value
;
4490 valptr
= bond_opt_parse(bond_opt_get(BOND_OPT_AD_USER_PORT_KEY
),
4493 pr_err("Error: No ad_user_port_key default value");
4496 ad_user_port_key
= valptr
->value
;
4498 if (lp_interval
== 0) {
4499 pr_warn("Warning: ip_interval must be between 1 and %d, so it was reset to %d\n",
4500 INT_MAX
, BOND_ALB_DEFAULT_LP_INTERVAL
);
4501 lp_interval
= BOND_ALB_DEFAULT_LP_INTERVAL
;
4504 /* fill params struct with the proper values */
4505 params
->mode
= bond_mode
;
4506 params
->xmit_policy
= xmit_hashtype
;
4507 params
->miimon
= miimon
;
4508 params
->num_peer_notif
= num_peer_notif
;
4509 params
->arp_interval
= arp_interval
;
4510 params
->arp_validate
= arp_validate_value
;
4511 params
->arp_all_targets
= arp_all_targets_value
;
4512 params
->updelay
= updelay
;
4513 params
->downdelay
= downdelay
;
4514 params
->use_carrier
= use_carrier
;
4515 params
->lacp_fast
= lacp_fast
;
4516 params
->primary
[0] = 0;
4517 params
->primary_reselect
= primary_reselect_value
;
4518 params
->fail_over_mac
= fail_over_mac_value
;
4519 params
->tx_queues
= tx_queues
;
4520 params
->all_slaves_active
= all_slaves_active
;
4521 params
->resend_igmp
= resend_igmp
;
4522 params
->min_links
= min_links
;
4523 params
->lp_interval
= lp_interval
;
4524 params
->packets_per_slave
= packets_per_slave
;
4525 params
->tlb_dynamic_lb
= 1; /* Default value */
4526 params
->ad_actor_sys_prio
= ad_actor_sys_prio
;
4527 eth_zero_addr(params
->ad_actor_system
);
4528 params
->ad_user_port_key
= ad_user_port_key
;
4529 if (packets_per_slave
> 0) {
4530 params
->reciprocal_packets_per_slave
=
4531 reciprocal_value(packets_per_slave
);
4533 /* reciprocal_packets_per_slave is unused if
4534 * packets_per_slave is 0 or 1, just initialize it
4536 params
->reciprocal_packets_per_slave
=
4537 (struct reciprocal_value
) { 0 };
4541 strncpy(params
->primary
, primary
, IFNAMSIZ
);
4542 params
->primary
[IFNAMSIZ
- 1] = 0;
4545 memcpy(params
->arp_targets
, arp_target
, sizeof(arp_target
));
4550 static struct lock_class_key bonding_netdev_xmit_lock_key
;
4551 static struct lock_class_key bonding_netdev_addr_lock_key
;
4552 static struct lock_class_key bonding_tx_busylock_key
;
4554 static void bond_set_lockdep_class_one(struct net_device
*dev
,
4555 struct netdev_queue
*txq
,
4558 lockdep_set_class(&txq
->_xmit_lock
,
4559 &bonding_netdev_xmit_lock_key
);
4562 static void bond_set_lockdep_class(struct net_device
*dev
)
4564 lockdep_set_class(&dev
->addr_list_lock
,
4565 &bonding_netdev_addr_lock_key
);
4566 netdev_for_each_tx_queue(dev
, bond_set_lockdep_class_one
, NULL
);
4567 dev
->qdisc_tx_busylock
= &bonding_tx_busylock_key
;
4570 /* Called from registration process */
4571 static int bond_init(struct net_device
*bond_dev
)
4573 struct bonding
*bond
= netdev_priv(bond_dev
);
4574 struct bond_net
*bn
= net_generic(dev_net(bond_dev
), bond_net_id
);
4576 netdev_dbg(bond_dev
, "Begin bond_init\n");
4578 bond
->wq
= create_singlethread_workqueue(bond_dev
->name
);
4582 bond_set_lockdep_class(bond_dev
);
4584 list_add_tail(&bond
->bond_list
, &bn
->dev_list
);
4586 bond_prepare_sysfs_group(bond
);
4588 bond_debug_register(bond
);
4590 /* Ensure valid dev_addr */
4591 if (is_zero_ether_addr(bond_dev
->dev_addr
) &&
4592 bond_dev
->addr_assign_type
== NET_ADDR_PERM
)
4593 eth_hw_addr_random(bond_dev
);
4598 unsigned int bond_get_num_tx_queues(void)
4603 /* Create a new bond based on the specified name and bonding parameters.
4604 * If name is NULL, obtain a suitable "bond%d" name for us.
4605 * Caller must NOT hold rtnl_lock; we need to release it here before we
4606 * set up our sysfs entries.
4608 int bond_create(struct net
*net
, const char *name
)
4610 struct net_device
*bond_dev
;
4611 struct bonding
*bond
;
4612 struct alb_bond_info
*bond_info
;
4617 bond_dev
= alloc_netdev_mq(sizeof(struct bonding
),
4618 name
? name
: "bond%d", NET_NAME_UNKNOWN
,
4619 bond_setup
, tx_queues
);
4621 pr_err("%s: eek! can't alloc netdev!\n", name
);
4627 * Initialize rx_hashtbl_used_head to RLB_NULL_INDEX.
4628 * It is set to 0 by default which is wrong.
4630 bond
= netdev_priv(bond_dev
);
4631 bond_info
= &(BOND_ALB_INFO(bond
));
4632 bond_info
->rx_hashtbl_used_head
= RLB_NULL_INDEX
;
4634 dev_net_set(bond_dev
, net
);
4635 bond_dev
->rtnl_link_ops
= &bond_link_ops
;
4637 res
= register_netdevice(bond_dev
);
4639 netif_carrier_off(bond_dev
);
4643 bond_destructor(bond_dev
);
4647 static int __net_init
bond_net_init(struct net
*net
)
4649 struct bond_net
*bn
= net_generic(net
, bond_net_id
);
4652 INIT_LIST_HEAD(&bn
->dev_list
);
4654 bond_create_proc_dir(bn
);
4655 bond_create_sysfs(bn
);
4660 static void __net_exit
bond_net_exit(struct net
*net
)
4662 struct bond_net
*bn
= net_generic(net
, bond_net_id
);
4663 struct bonding
*bond
, *tmp_bond
;
4666 bond_destroy_sysfs(bn
);
4668 /* Kill off any bonds created after unregistering bond rtnl ops */
4670 list_for_each_entry_safe(bond
, tmp_bond
, &bn
->dev_list
, bond_list
)
4671 unregister_netdevice_queue(bond
->dev
, &list
);
4672 unregister_netdevice_many(&list
);
4675 bond_destroy_proc_dir(bn
);
4678 static struct pernet_operations bond_net_ops
= {
4679 .init
= bond_net_init
,
4680 .exit
= bond_net_exit
,
4682 .size
= sizeof(struct bond_net
),
4685 static int __init
bonding_init(void)
4690 pr_info("%s", bond_version
);
4692 res
= bond_check_params(&bonding_defaults
);
4696 res
= register_pernet_subsys(&bond_net_ops
);
4700 res
= bond_netlink_init();
4704 bond_create_debugfs();
4706 for (i
= 0; i
< max_bonds
; i
++) {
4707 res
= bond_create(&init_net
, NULL
);
4712 register_netdevice_notifier(&bond_netdev_notifier
);
4716 bond_destroy_debugfs();
4717 bond_netlink_fini();
4719 unregister_pernet_subsys(&bond_net_ops
);
4724 static void __exit
bonding_exit(void)
4726 unregister_netdevice_notifier(&bond_netdev_notifier
);
4728 bond_destroy_debugfs();
4730 bond_netlink_fini();
4731 unregister_pernet_subsys(&bond_net_ops
);
4733 #ifdef CONFIG_NET_POLL_CONTROLLER
4734 /* Make sure we don't have an imbalance on our netpoll blocking */
4735 WARN_ON(atomic_read(&netpoll_block_tx
));
4739 module_init(bonding_init
);
4740 module_exit(bonding_exit
);
4741 MODULE_LICENSE("GPL");
4742 MODULE_VERSION(DRV_VERSION
);
4743 MODULE_DESCRIPTION(DRV_DESCRIPTION
", v" DRV_VERSION
);
4744 MODULE_AUTHOR("Thomas Davis, tadavis@lbl.gov and many others");