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_keys.h>
84 /*---------------------------- Module parameters ----------------------------*/
86 /* monitor all links that often (in milliseconds). <=0 disables monitoring */
88 static int max_bonds
= BOND_DEFAULT_MAX_BONDS
;
89 static int tx_queues
= BOND_DEFAULT_TX_QUEUES
;
90 static int num_peer_notif
= 1;
94 static int use_carrier
= 1;
97 static char *primary_reselect
;
98 static char *lacp_rate
;
100 static char *ad_select
;
101 static char *xmit_hash_policy
;
102 static int arp_interval
;
103 static char *arp_ip_target
[BOND_MAX_ARP_TARGETS
];
104 static char *arp_validate
;
105 static char *arp_all_targets
;
106 static char *fail_over_mac
;
107 static int all_slaves_active
;
108 static struct bond_params bonding_defaults
;
109 static int resend_igmp
= BOND_DEFAULT_RESEND_IGMP
;
110 static int packets_per_slave
= 1;
111 static int lp_interval
= BOND_ALB_DEFAULT_LP_INTERVAL
;
113 module_param(max_bonds
, int, 0);
114 MODULE_PARM_DESC(max_bonds
, "Max number of bonded devices");
115 module_param(tx_queues
, int, 0);
116 MODULE_PARM_DESC(tx_queues
, "Max number of transmit queues (default = 16)");
117 module_param_named(num_grat_arp
, num_peer_notif
, int, 0644);
118 MODULE_PARM_DESC(num_grat_arp
, "Number of peer notifications to send on "
119 "failover event (alias of num_unsol_na)");
120 module_param_named(num_unsol_na
, num_peer_notif
, int, 0644);
121 MODULE_PARM_DESC(num_unsol_na
, "Number of peer notifications to send on "
122 "failover event (alias of num_grat_arp)");
123 module_param(miimon
, int, 0);
124 MODULE_PARM_DESC(miimon
, "Link check interval in milliseconds");
125 module_param(updelay
, int, 0);
126 MODULE_PARM_DESC(updelay
, "Delay before considering link up, in milliseconds");
127 module_param(downdelay
, int, 0);
128 MODULE_PARM_DESC(downdelay
, "Delay before considering link down, "
130 module_param(use_carrier
, int, 0);
131 MODULE_PARM_DESC(use_carrier
, "Use netif_carrier_ok (vs MII ioctls) in miimon; "
132 "0 for off, 1 for on (default)");
133 module_param(mode
, charp
, 0);
134 MODULE_PARM_DESC(mode
, "Mode of operation; 0 for balance-rr, "
135 "1 for active-backup, 2 for balance-xor, "
136 "3 for broadcast, 4 for 802.3ad, 5 for balance-tlb, "
137 "6 for balance-alb");
138 module_param(primary
, charp
, 0);
139 MODULE_PARM_DESC(primary
, "Primary network device to use");
140 module_param(primary_reselect
, charp
, 0);
141 MODULE_PARM_DESC(primary_reselect
, "Reselect primary slave "
143 "0 for always (default), "
144 "1 for only if speed of primary is "
146 "2 for only on active slave "
148 module_param(lacp_rate
, charp
, 0);
149 MODULE_PARM_DESC(lacp_rate
, "LACPDU tx rate to request from 802.3ad partner; "
150 "0 for slow, 1 for fast");
151 module_param(ad_select
, charp
, 0);
152 MODULE_PARM_DESC(ad_select
, "803.ad aggregation selection logic; "
153 "0 for stable (default), 1 for bandwidth, "
155 module_param(min_links
, int, 0);
156 MODULE_PARM_DESC(min_links
, "Minimum number of available links before turning on carrier");
158 module_param(xmit_hash_policy
, charp
, 0);
159 MODULE_PARM_DESC(xmit_hash_policy
, "balance-xor and 802.3ad hashing method; "
160 "0 for layer 2 (default), 1 for layer 3+4, "
161 "2 for layer 2+3, 3 for encap layer 2+3, "
162 "4 for encap layer 3+4");
163 module_param(arp_interval
, int, 0);
164 MODULE_PARM_DESC(arp_interval
, "arp interval in milliseconds");
165 module_param_array(arp_ip_target
, charp
, NULL
, 0);
166 MODULE_PARM_DESC(arp_ip_target
, "arp targets in n.n.n.n form");
167 module_param(arp_validate
, charp
, 0);
168 MODULE_PARM_DESC(arp_validate
, "validate src/dst of ARP probes; "
169 "0 for none (default), 1 for active, "
170 "2 for backup, 3 for all");
171 module_param(arp_all_targets
, charp
, 0);
172 MODULE_PARM_DESC(arp_all_targets
, "fail on any/all arp targets timeout; 0 for any (default), 1 for all");
173 module_param(fail_over_mac
, charp
, 0);
174 MODULE_PARM_DESC(fail_over_mac
, "For active-backup, do not set all slaves to "
175 "the same MAC; 0 for none (default), "
176 "1 for active, 2 for follow");
177 module_param(all_slaves_active
, int, 0);
178 MODULE_PARM_DESC(all_slaves_active
, "Keep all frames received on an interface"
179 "by setting active flag for all slaves; "
180 "0 for never (default), 1 for always.");
181 module_param(resend_igmp
, int, 0);
182 MODULE_PARM_DESC(resend_igmp
, "Number of IGMP membership reports to send on "
184 module_param(packets_per_slave
, int, 0);
185 MODULE_PARM_DESC(packets_per_slave
, "Packets to send per slave in balance-rr "
186 "mode; 0 for a random slave, 1 packet per "
187 "slave (default), >1 packets per slave.");
188 module_param(lp_interval
, uint
, 0);
189 MODULE_PARM_DESC(lp_interval
, "The number of seconds between instances where "
190 "the bonding driver sends learning packets to "
191 "each slaves peer switch. The default is 1.");
193 /*----------------------------- Global variables ----------------------------*/
195 #ifdef CONFIG_NET_POLL_CONTROLLER
196 atomic_t netpoll_block_tx
= ATOMIC_INIT(0);
199 int bond_net_id __read_mostly
;
201 static __be32 arp_target
[BOND_MAX_ARP_TARGETS
];
202 static int arp_ip_count
;
203 static int bond_mode
= BOND_MODE_ROUNDROBIN
;
204 static int xmit_hashtype
= BOND_XMIT_POLICY_LAYER2
;
205 static int lacp_fast
;
207 /*-------------------------- Forward declarations ---------------------------*/
209 static int bond_init(struct net_device
*bond_dev
);
210 static void bond_uninit(struct net_device
*bond_dev
);
212 /*---------------------------- General routines -----------------------------*/
214 const char *bond_mode_name(int mode
)
216 static const char *names
[] = {
217 [BOND_MODE_ROUNDROBIN
] = "load balancing (round-robin)",
218 [BOND_MODE_ACTIVEBACKUP
] = "fault-tolerance (active-backup)",
219 [BOND_MODE_XOR
] = "load balancing (xor)",
220 [BOND_MODE_BROADCAST
] = "fault-tolerance (broadcast)",
221 [BOND_MODE_8023AD
] = "IEEE 802.3ad Dynamic link aggregation",
222 [BOND_MODE_TLB
] = "transmit load balancing",
223 [BOND_MODE_ALB
] = "adaptive load balancing",
226 if (mode
< BOND_MODE_ROUNDROBIN
|| mode
> BOND_MODE_ALB
)
232 /*---------------------------------- VLAN -----------------------------------*/
235 * bond_dev_queue_xmit - Prepare skb for xmit.
237 * @bond: bond device that got this skb for tx.
238 * @skb: hw accel VLAN tagged skb to transmit
239 * @slave_dev: slave that is supposed to xmit this skbuff
241 void bond_dev_queue_xmit(struct bonding
*bond
, struct sk_buff
*skb
,
242 struct net_device
*slave_dev
)
244 skb
->dev
= slave_dev
;
246 BUILD_BUG_ON(sizeof(skb
->queue_mapping
) !=
247 sizeof(qdisc_skb_cb(skb
)->slave_dev_queue_mapping
));
248 skb
->queue_mapping
= qdisc_skb_cb(skb
)->slave_dev_queue_mapping
;
250 if (unlikely(netpoll_tx_running(bond
->dev
)))
251 bond_netpoll_send_skb(bond_get_slave_by_dev(bond
, slave_dev
), skb
);
257 * In the following 2 functions, bond_vlan_rx_add_vid and bond_vlan_rx_kill_vid,
258 * We don't protect the slave list iteration with a lock because:
259 * a. This operation is performed in IOCTL context,
260 * b. The operation is protected by the RTNL semaphore in the 8021q code,
261 * c. Holding a lock with BH disabled while directly calling a base driver
262 * entry point is generally a BAD idea.
264 * The design of synchronization/protection for this operation in the 8021q
265 * module is good for one or more VLAN devices over a single physical device
266 * and cannot be extended for a teaming solution like bonding, so there is a
267 * potential race condition here where a net device from the vlan group might
268 * be referenced (either by a base driver or the 8021q code) while it is being
269 * removed from the system. However, it turns out we're not making matters
270 * worse, and if it works for regular VLAN usage it will work here too.
274 * bond_vlan_rx_add_vid - Propagates adding an id to slaves
275 * @bond_dev: bonding net device that got called
276 * @vid: vlan id being added
278 static int bond_vlan_rx_add_vid(struct net_device
*bond_dev
,
279 __be16 proto
, u16 vid
)
281 struct bonding
*bond
= netdev_priv(bond_dev
);
282 struct slave
*slave
, *rollback_slave
;
283 struct list_head
*iter
;
286 bond_for_each_slave(bond
, slave
, iter
) {
287 res
= vlan_vid_add(slave
->dev
, proto
, vid
);
295 /* unwind to the slave that failed */
296 bond_for_each_slave(bond
, rollback_slave
, iter
) {
297 if (rollback_slave
== slave
)
300 vlan_vid_del(rollback_slave
->dev
, proto
, vid
);
307 * bond_vlan_rx_kill_vid - Propagates deleting an id to slaves
308 * @bond_dev: bonding net device that got called
309 * @vid: vlan id being removed
311 static int bond_vlan_rx_kill_vid(struct net_device
*bond_dev
,
312 __be16 proto
, u16 vid
)
314 struct bonding
*bond
= netdev_priv(bond_dev
);
315 struct list_head
*iter
;
318 bond_for_each_slave(bond
, slave
, iter
)
319 vlan_vid_del(slave
->dev
, proto
, vid
);
321 if (bond_is_lb(bond
))
322 bond_alb_clear_vlan(bond
, vid
);
327 /*------------------------------- Link status -------------------------------*/
330 * Set the carrier state for the master according to the state of its
331 * slaves. If any slaves are up, the master is up. In 802.3ad mode,
332 * do special 802.3ad magic.
334 * Returns zero if carrier state does not change, nonzero if it does.
336 static int bond_set_carrier(struct bonding
*bond
)
338 struct list_head
*iter
;
341 if (!bond_has_slaves(bond
))
344 if (BOND_MODE(bond
) == BOND_MODE_8023AD
)
345 return bond_3ad_set_carrier(bond
);
347 bond_for_each_slave(bond
, slave
, iter
) {
348 if (slave
->link
== BOND_LINK_UP
) {
349 if (!netif_carrier_ok(bond
->dev
)) {
350 netif_carrier_on(bond
->dev
);
358 if (netif_carrier_ok(bond
->dev
)) {
359 netif_carrier_off(bond
->dev
);
366 * Get link speed and duplex from the slave's base driver
367 * using ethtool. If for some reason the call fails or the
368 * values are invalid, set speed and duplex to -1,
371 static void bond_update_speed_duplex(struct slave
*slave
)
373 struct net_device
*slave_dev
= slave
->dev
;
374 struct ethtool_cmd ecmd
;
378 slave
->speed
= SPEED_UNKNOWN
;
379 slave
->duplex
= DUPLEX_UNKNOWN
;
381 res
= __ethtool_get_settings(slave_dev
, &ecmd
);
385 slave_speed
= ethtool_cmd_speed(&ecmd
);
386 if (slave_speed
== 0 || slave_speed
== ((__u32
) -1))
389 switch (ecmd
.duplex
) {
397 slave
->speed
= slave_speed
;
398 slave
->duplex
= ecmd
.duplex
;
403 const char *bond_slave_link_status(s8 link
)
420 * if <dev> supports MII link status reporting, check its link status.
422 * We either do MII/ETHTOOL ioctls, or check netif_carrier_ok(),
423 * depending upon the setting of the use_carrier parameter.
425 * Return either BMSR_LSTATUS, meaning that the link is up (or we
426 * can't tell and just pretend it is), or 0, meaning that the link is
429 * If reporting is non-zero, instead of faking link up, return -1 if
430 * both ETHTOOL and MII ioctls fail (meaning the device does not
431 * support them). If use_carrier is set, return whatever it says.
432 * It'd be nice if there was a good way to tell if a driver supports
433 * netif_carrier, but there really isn't.
435 static int bond_check_dev_link(struct bonding
*bond
,
436 struct net_device
*slave_dev
, int reporting
)
438 const struct net_device_ops
*slave_ops
= slave_dev
->netdev_ops
;
439 int (*ioctl
)(struct net_device
*, struct ifreq
*, int);
441 struct mii_ioctl_data
*mii
;
443 if (!reporting
&& !netif_running(slave_dev
))
446 if (bond
->params
.use_carrier
)
447 return netif_carrier_ok(slave_dev
) ? BMSR_LSTATUS
: 0;
449 /* Try to get link status using Ethtool first. */
450 if (slave_dev
->ethtool_ops
->get_link
)
451 return slave_dev
->ethtool_ops
->get_link(slave_dev
) ?
454 /* Ethtool can't be used, fallback to MII ioctls. */
455 ioctl
= slave_ops
->ndo_do_ioctl
;
457 /* TODO: set pointer to correct ioctl on a per team member */
458 /* bases to make this more efficient. that is, once */
459 /* we determine the correct ioctl, we will always */
460 /* call it and not the others for that team */
464 * We cannot assume that SIOCGMIIPHY will also read a
465 * register; not all network drivers (e.g., e100)
469 /* Yes, the mii is overlaid on the ifreq.ifr_ifru */
470 strncpy(ifr
.ifr_name
, slave_dev
->name
, IFNAMSIZ
);
472 if (IOCTL(slave_dev
, &ifr
, SIOCGMIIPHY
) == 0) {
473 mii
->reg_num
= MII_BMSR
;
474 if (IOCTL(slave_dev
, &ifr
, SIOCGMIIREG
) == 0)
475 return mii
->val_out
& BMSR_LSTATUS
;
480 * If reporting, report that either there's no dev->do_ioctl,
481 * or both SIOCGMIIREG and get_link failed (meaning that we
482 * cannot report link status). If not reporting, pretend
485 return reporting
? -1 : BMSR_LSTATUS
;
488 /*----------------------------- Multicast list ------------------------------*/
491 * Push the promiscuity flag down to appropriate slaves
493 static int bond_set_promiscuity(struct bonding
*bond
, int inc
)
495 struct list_head
*iter
;
498 if (bond_uses_primary(bond
)) {
499 struct slave
*curr_active
= rtnl_dereference(bond
->curr_active_slave
);
502 err
= dev_set_promiscuity(curr_active
->dev
, inc
);
506 bond_for_each_slave(bond
, slave
, iter
) {
507 err
= dev_set_promiscuity(slave
->dev
, inc
);
516 * Push the allmulti flag down to all slaves
518 static int bond_set_allmulti(struct bonding
*bond
, int inc
)
520 struct list_head
*iter
;
523 if (bond_uses_primary(bond
)) {
524 struct slave
*curr_active
= rtnl_dereference(bond
->curr_active_slave
);
527 err
= dev_set_allmulti(curr_active
->dev
, inc
);
531 bond_for_each_slave(bond
, slave
, iter
) {
532 err
= dev_set_allmulti(slave
->dev
, inc
);
541 * Retrieve the list of registered multicast addresses for the bonding
542 * device and retransmit an IGMP JOIN request to the current active
545 static void bond_resend_igmp_join_requests_delayed(struct work_struct
*work
)
547 struct bonding
*bond
= container_of(work
, struct bonding
,
550 if (!rtnl_trylock()) {
551 queue_delayed_work(bond
->wq
, &bond
->mcast_work
, 1);
554 call_netdevice_notifiers(NETDEV_RESEND_IGMP
, bond
->dev
);
556 if (bond
->igmp_retrans
> 1) {
557 bond
->igmp_retrans
--;
558 queue_delayed_work(bond
->wq
, &bond
->mcast_work
, HZ
/5);
563 /* Flush bond's hardware addresses from slave
565 static void bond_hw_addr_flush(struct net_device
*bond_dev
,
566 struct net_device
*slave_dev
)
568 struct bonding
*bond
= netdev_priv(bond_dev
);
570 dev_uc_unsync(slave_dev
, bond_dev
);
571 dev_mc_unsync(slave_dev
, bond_dev
);
573 if (BOND_MODE(bond
) == BOND_MODE_8023AD
) {
574 /* del lacpdu mc addr from mc list */
575 u8 lacpdu_multicast
[ETH_ALEN
] = MULTICAST_LACPDU_ADDR
;
577 dev_mc_del(slave_dev
, lacpdu_multicast
);
581 /*--------------------------- Active slave change ---------------------------*/
583 /* Update the hardware address list and promisc/allmulti for the new and
584 * old active slaves (if any). Modes that are not using primary keep all
585 * slaves up date at all times; only the modes that use primary need to call
586 * this function to swap these settings during a failover.
588 static void bond_hw_addr_swap(struct bonding
*bond
, struct slave
*new_active
,
589 struct slave
*old_active
)
594 if (bond
->dev
->flags
& IFF_PROMISC
)
595 dev_set_promiscuity(old_active
->dev
, -1);
597 if (bond
->dev
->flags
& IFF_ALLMULTI
)
598 dev_set_allmulti(old_active
->dev
, -1);
600 bond_hw_addr_flush(bond
->dev
, old_active
->dev
);
604 /* FIXME: Signal errors upstream. */
605 if (bond
->dev
->flags
& IFF_PROMISC
)
606 dev_set_promiscuity(new_active
->dev
, 1);
608 if (bond
->dev
->flags
& IFF_ALLMULTI
)
609 dev_set_allmulti(new_active
->dev
, 1);
611 netif_addr_lock_bh(bond
->dev
);
612 dev_uc_sync(new_active
->dev
, bond
->dev
);
613 dev_mc_sync(new_active
->dev
, bond
->dev
);
614 netif_addr_unlock_bh(bond
->dev
);
619 * bond_set_dev_addr - clone slave's address to bond
620 * @bond_dev: bond net device
621 * @slave_dev: slave net device
623 * Should be called with RTNL held.
625 static void bond_set_dev_addr(struct net_device
*bond_dev
,
626 struct net_device
*slave_dev
)
628 netdev_dbg(bond_dev
, "bond_dev=%p slave_dev=%p slave_dev->addr_len=%d\n",
629 bond_dev
, slave_dev
, slave_dev
->addr_len
);
630 memcpy(bond_dev
->dev_addr
, slave_dev
->dev_addr
, slave_dev
->addr_len
);
631 bond_dev
->addr_assign_type
= NET_ADDR_STOLEN
;
632 call_netdevice_notifiers(NETDEV_CHANGEADDR
, bond_dev
);
636 * bond_do_fail_over_mac
638 * Perform special MAC address swapping for fail_over_mac settings
640 * Called with RTNL, curr_slave_lock for write_bh.
642 static void bond_do_fail_over_mac(struct bonding
*bond
,
643 struct slave
*new_active
,
644 struct slave
*old_active
)
645 __releases(&bond
->curr_slave_lock
)
646 __acquires(&bond
->curr_slave_lock
)
648 u8 tmp_mac
[ETH_ALEN
];
649 struct sockaddr saddr
;
652 switch (bond
->params
.fail_over_mac
) {
653 case BOND_FOM_ACTIVE
:
655 write_unlock_bh(&bond
->curr_slave_lock
);
656 bond_set_dev_addr(bond
->dev
, new_active
->dev
);
657 write_lock_bh(&bond
->curr_slave_lock
);
660 case BOND_FOM_FOLLOW
:
662 * if new_active && old_active, swap them
663 * if just old_active, do nothing (going to no active slave)
664 * if just new_active, set new_active to bond's MAC
669 write_unlock_bh(&bond
->curr_slave_lock
);
672 ether_addr_copy(tmp_mac
, new_active
->dev
->dev_addr
);
673 ether_addr_copy(saddr
.sa_data
,
674 old_active
->dev
->dev_addr
);
675 saddr
.sa_family
= new_active
->dev
->type
;
677 ether_addr_copy(saddr
.sa_data
, bond
->dev
->dev_addr
);
678 saddr
.sa_family
= bond
->dev
->type
;
681 rv
= dev_set_mac_address(new_active
->dev
, &saddr
);
683 netdev_err(bond
->dev
, "Error %d setting MAC of slave %s\n",
684 -rv
, new_active
->dev
->name
);
691 ether_addr_copy(saddr
.sa_data
, tmp_mac
);
692 saddr
.sa_family
= old_active
->dev
->type
;
694 rv
= dev_set_mac_address(old_active
->dev
, &saddr
);
696 netdev_err(bond
->dev
, "Error %d setting MAC of slave %s\n",
697 -rv
, new_active
->dev
->name
);
699 write_lock_bh(&bond
->curr_slave_lock
);
702 netdev_err(bond
->dev
, "bond_do_fail_over_mac impossible: bad policy %d\n",
703 bond
->params
.fail_over_mac
);
709 static bool bond_should_change_active(struct bonding
*bond
)
711 struct slave
*prim
= bond
->primary_slave
;
712 struct slave
*curr
= bond_deref_active_protected(bond
);
714 if (!prim
|| !curr
|| curr
->link
!= BOND_LINK_UP
)
716 if (bond
->force_primary
) {
717 bond
->force_primary
= false;
720 if (bond
->params
.primary_reselect
== BOND_PRI_RESELECT_BETTER
&&
721 (prim
->speed
< curr
->speed
||
722 (prim
->speed
== curr
->speed
&& prim
->duplex
<= curr
->duplex
)))
724 if (bond
->params
.primary_reselect
== BOND_PRI_RESELECT_FAILURE
)
730 * find_best_interface - select the best available slave to be the active one
731 * @bond: our bonding struct
733 static struct slave
*bond_find_best_slave(struct bonding
*bond
)
735 struct slave
*slave
, *bestslave
= NULL
;
736 struct list_head
*iter
;
737 int mintime
= bond
->params
.updelay
;
739 if (bond
->primary_slave
&& bond
->primary_slave
->link
== BOND_LINK_UP
&&
740 bond_should_change_active(bond
))
741 return bond
->primary_slave
;
743 bond_for_each_slave(bond
, slave
, iter
) {
744 if (slave
->link
== BOND_LINK_UP
)
746 if (slave
->link
== BOND_LINK_BACK
&& bond_slave_is_up(slave
) &&
747 slave
->delay
< mintime
) {
748 mintime
= slave
->delay
;
756 static bool bond_should_notify_peers(struct bonding
*bond
)
761 slave
= rcu_dereference(bond
->curr_active_slave
);
764 netdev_dbg(bond
->dev
, "bond_should_notify_peers: slave %s\n",
765 slave
? slave
->dev
->name
: "NULL");
767 if (!slave
|| !bond
->send_peer_notif
||
768 test_bit(__LINK_STATE_LINKWATCH_PENDING
, &slave
->dev
->state
))
775 * change_active_interface - change the active slave into the specified one
776 * @bond: our bonding struct
777 * @new: the new slave to make the active one
779 * Set the new slave to the bond's settings and unset them on the old
781 * Setting include flags, mc-list, promiscuity, allmulti, etc.
783 * If @new's link state is %BOND_LINK_BACK we'll set it to %BOND_LINK_UP,
784 * because it is apparently the best available slave we have, even though its
785 * updelay hasn't timed out yet.
787 * If new_active is not NULL, caller must hold curr_slave_lock for write_bh.
789 void bond_change_active_slave(struct bonding
*bond
, struct slave
*new_active
)
791 struct slave
*old_active
;
793 old_active
= rcu_dereference_protected(bond
->curr_active_slave
,
795 lockdep_is_held(&bond
->curr_slave_lock
));
797 if (old_active
== new_active
)
801 new_active
->last_link_up
= jiffies
;
803 if (new_active
->link
== BOND_LINK_BACK
) {
804 if (bond_uses_primary(bond
)) {
805 netdev_info(bond
->dev
, "making interface %s the new active one %d ms earlier\n",
806 new_active
->dev
->name
,
807 (bond
->params
.updelay
- new_active
->delay
) * bond
->params
.miimon
);
810 new_active
->delay
= 0;
811 new_active
->link
= BOND_LINK_UP
;
813 if (BOND_MODE(bond
) == BOND_MODE_8023AD
)
814 bond_3ad_handle_link_change(new_active
, BOND_LINK_UP
);
816 if (bond_is_lb(bond
))
817 bond_alb_handle_link_change(bond
, new_active
, BOND_LINK_UP
);
819 if (bond_uses_primary(bond
)) {
820 netdev_info(bond
->dev
, "making interface %s the new active one\n",
821 new_active
->dev
->name
);
826 if (bond_uses_primary(bond
))
827 bond_hw_addr_swap(bond
, new_active
, old_active
);
829 if (bond_is_lb(bond
)) {
830 bond_alb_handle_active_change(bond
, new_active
);
832 bond_set_slave_inactive_flags(old_active
,
833 BOND_SLAVE_NOTIFY_NOW
);
835 bond_set_slave_active_flags(new_active
,
836 BOND_SLAVE_NOTIFY_NOW
);
838 rcu_assign_pointer(bond
->curr_active_slave
, new_active
);
841 if (BOND_MODE(bond
) == BOND_MODE_ACTIVEBACKUP
) {
843 bond_set_slave_inactive_flags(old_active
,
844 BOND_SLAVE_NOTIFY_NOW
);
847 bool should_notify_peers
= false;
849 bond_set_slave_active_flags(new_active
,
850 BOND_SLAVE_NOTIFY_NOW
);
852 if (bond
->params
.fail_over_mac
)
853 bond_do_fail_over_mac(bond
, new_active
,
856 if (netif_running(bond
->dev
)) {
857 bond
->send_peer_notif
=
858 bond
->params
.num_peer_notif
;
859 should_notify_peers
=
860 bond_should_notify_peers(bond
);
863 write_unlock_bh(&bond
->curr_slave_lock
);
865 call_netdevice_notifiers(NETDEV_BONDING_FAILOVER
, bond
->dev
);
866 if (should_notify_peers
)
867 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS
,
870 write_lock_bh(&bond
->curr_slave_lock
);
874 /* resend IGMP joins since active slave has changed or
875 * all were sent on curr_active_slave.
876 * resend only if bond is brought up with the affected
877 * bonding modes and the retransmission is enabled */
878 if (netif_running(bond
->dev
) && (bond
->params
.resend_igmp
> 0) &&
879 ((bond_uses_primary(bond
) && new_active
) ||
880 BOND_MODE(bond
) == BOND_MODE_ROUNDROBIN
)) {
881 bond
->igmp_retrans
= bond
->params
.resend_igmp
;
882 queue_delayed_work(bond
->wq
, &bond
->mcast_work
, 1);
887 * bond_select_active_slave - select a new active slave, if needed
888 * @bond: our bonding struct
890 * This functions should be called when one of the following occurs:
891 * - The old curr_active_slave has been released or lost its link.
892 * - The primary_slave has got its link back.
893 * - A slave has got its link back and there's no old curr_active_slave.
895 * Caller must hold curr_slave_lock for write_bh.
897 void bond_select_active_slave(struct bonding
*bond
)
899 struct slave
*best_slave
;
902 best_slave
= bond_find_best_slave(bond
);
903 if (best_slave
!= bond_deref_active_protected(bond
)) {
904 bond_change_active_slave(bond
, best_slave
);
905 rv
= bond_set_carrier(bond
);
909 if (netif_carrier_ok(bond
->dev
)) {
910 netdev_info(bond
->dev
, "first active interface up!\n");
912 netdev_info(bond
->dev
, "now running without any active interface!\n");
917 #ifdef CONFIG_NET_POLL_CONTROLLER
918 static inline int slave_enable_netpoll(struct slave
*slave
)
923 np
= kzalloc(sizeof(*np
), GFP_KERNEL
);
928 err
= __netpoll_setup(np
, slave
->dev
);
937 static inline void slave_disable_netpoll(struct slave
*slave
)
939 struct netpoll
*np
= slave
->np
;
945 __netpoll_free_async(np
);
948 static void bond_poll_controller(struct net_device
*bond_dev
)
952 static void bond_netpoll_cleanup(struct net_device
*bond_dev
)
954 struct bonding
*bond
= netdev_priv(bond_dev
);
955 struct list_head
*iter
;
958 bond_for_each_slave(bond
, slave
, iter
)
959 if (bond_slave_is_up(slave
))
960 slave_disable_netpoll(slave
);
963 static int bond_netpoll_setup(struct net_device
*dev
, struct netpoll_info
*ni
)
965 struct bonding
*bond
= netdev_priv(dev
);
966 struct list_head
*iter
;
970 bond_for_each_slave(bond
, slave
, iter
) {
971 err
= slave_enable_netpoll(slave
);
973 bond_netpoll_cleanup(dev
);
980 static inline int slave_enable_netpoll(struct slave
*slave
)
984 static inline void slave_disable_netpoll(struct slave
*slave
)
987 static void bond_netpoll_cleanup(struct net_device
*bond_dev
)
992 /*---------------------------------- IOCTL ----------------------------------*/
994 static netdev_features_t
bond_fix_features(struct net_device
*dev
,
995 netdev_features_t features
)
997 struct bonding
*bond
= netdev_priv(dev
);
998 struct list_head
*iter
;
999 netdev_features_t mask
;
1000 struct slave
*slave
;
1003 features
&= ~NETIF_F_ONE_FOR_ALL
;
1004 features
|= NETIF_F_ALL_FOR_ALL
;
1006 bond_for_each_slave(bond
, slave
, iter
) {
1007 features
= netdev_increment_features(features
,
1008 slave
->dev
->features
,
1011 features
= netdev_add_tso_features(features
, mask
);
1016 #define BOND_VLAN_FEATURES (NETIF_F_ALL_CSUM | NETIF_F_SG | \
1017 NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
1018 NETIF_F_HIGHDMA | NETIF_F_LRO)
1020 #define BOND_ENC_FEATURES (NETIF_F_ALL_CSUM | NETIF_F_SG | NETIF_F_RXCSUM |\
1021 NETIF_F_TSO | NETIF_F_GSO_UDP_TUNNEL)
1023 static void bond_compute_features(struct bonding
*bond
)
1025 unsigned int flags
, dst_release_flag
= IFF_XMIT_DST_RELEASE
;
1026 netdev_features_t vlan_features
= BOND_VLAN_FEATURES
;
1027 netdev_features_t enc_features
= BOND_ENC_FEATURES
;
1028 struct net_device
*bond_dev
= bond
->dev
;
1029 struct list_head
*iter
;
1030 struct slave
*slave
;
1031 unsigned short max_hard_header_len
= ETH_HLEN
;
1032 unsigned int gso_max_size
= GSO_MAX_SIZE
;
1033 u16 gso_max_segs
= GSO_MAX_SEGS
;
1035 if (!bond_has_slaves(bond
))
1037 vlan_features
&= NETIF_F_ALL_FOR_ALL
;
1039 bond_for_each_slave(bond
, slave
, iter
) {
1040 vlan_features
= netdev_increment_features(vlan_features
,
1041 slave
->dev
->vlan_features
, BOND_VLAN_FEATURES
);
1043 enc_features
= netdev_increment_features(enc_features
,
1044 slave
->dev
->hw_enc_features
,
1046 dst_release_flag
&= slave
->dev
->priv_flags
;
1047 if (slave
->dev
->hard_header_len
> max_hard_header_len
)
1048 max_hard_header_len
= slave
->dev
->hard_header_len
;
1050 gso_max_size
= min(gso_max_size
, slave
->dev
->gso_max_size
);
1051 gso_max_segs
= min(gso_max_segs
, slave
->dev
->gso_max_segs
);
1055 bond_dev
->vlan_features
= vlan_features
;
1056 bond_dev
->hw_enc_features
= enc_features
;
1057 bond_dev
->hard_header_len
= max_hard_header_len
;
1058 bond_dev
->gso_max_segs
= gso_max_segs
;
1059 netif_set_gso_max_size(bond_dev
, gso_max_size
);
1061 flags
= bond_dev
->priv_flags
& ~IFF_XMIT_DST_RELEASE
;
1062 bond_dev
->priv_flags
= flags
| dst_release_flag
;
1064 netdev_change_features(bond_dev
);
1067 static void bond_setup_by_slave(struct net_device
*bond_dev
,
1068 struct net_device
*slave_dev
)
1070 bond_dev
->header_ops
= slave_dev
->header_ops
;
1072 bond_dev
->type
= slave_dev
->type
;
1073 bond_dev
->hard_header_len
= slave_dev
->hard_header_len
;
1074 bond_dev
->addr_len
= slave_dev
->addr_len
;
1076 memcpy(bond_dev
->broadcast
, slave_dev
->broadcast
,
1077 slave_dev
->addr_len
);
1080 /* On bonding slaves other than the currently active slave, suppress
1081 * duplicates except for alb non-mcast/bcast.
1083 static bool bond_should_deliver_exact_match(struct sk_buff
*skb
,
1084 struct slave
*slave
,
1085 struct bonding
*bond
)
1087 if (bond_is_slave_inactive(slave
)) {
1088 if (BOND_MODE(bond
) == BOND_MODE_ALB
&&
1089 skb
->pkt_type
!= PACKET_BROADCAST
&&
1090 skb
->pkt_type
!= PACKET_MULTICAST
)
1097 static rx_handler_result_t
bond_handle_frame(struct sk_buff
**pskb
)
1099 struct sk_buff
*skb
= *pskb
;
1100 struct slave
*slave
;
1101 struct bonding
*bond
;
1102 int (*recv_probe
)(const struct sk_buff
*, struct bonding
*,
1104 int ret
= RX_HANDLER_ANOTHER
;
1106 skb
= skb_share_check(skb
, GFP_ATOMIC
);
1108 return RX_HANDLER_CONSUMED
;
1112 slave
= bond_slave_get_rcu(skb
->dev
);
1115 recv_probe
= ACCESS_ONCE(bond
->recv_probe
);
1117 ret
= recv_probe(skb
, bond
, slave
);
1118 if (ret
== RX_HANDLER_CONSUMED
) {
1124 if (bond_should_deliver_exact_match(skb
, slave
, bond
)) {
1125 return RX_HANDLER_EXACT
;
1128 skb
->dev
= bond
->dev
;
1130 if (BOND_MODE(bond
) == BOND_MODE_ALB
&&
1131 bond
->dev
->priv_flags
& IFF_BRIDGE_PORT
&&
1132 skb
->pkt_type
== PACKET_HOST
) {
1134 if (unlikely(skb_cow_head(skb
,
1135 skb
->data
- skb_mac_header(skb
)))) {
1137 return RX_HANDLER_CONSUMED
;
1139 ether_addr_copy(eth_hdr(skb
)->h_dest
, bond
->dev
->dev_addr
);
1145 static int bond_master_upper_dev_link(struct net_device
*bond_dev
,
1146 struct net_device
*slave_dev
,
1147 struct slave
*slave
)
1151 err
= netdev_master_upper_dev_link_private(slave_dev
, bond_dev
, slave
);
1154 slave_dev
->flags
|= IFF_SLAVE
;
1155 rtmsg_ifinfo(RTM_NEWLINK
, slave_dev
, IFF_SLAVE
, GFP_KERNEL
);
1159 static void bond_upper_dev_unlink(struct net_device
*bond_dev
,
1160 struct net_device
*slave_dev
)
1162 netdev_upper_dev_unlink(slave_dev
, bond_dev
);
1163 slave_dev
->flags
&= ~IFF_SLAVE
;
1164 rtmsg_ifinfo(RTM_NEWLINK
, slave_dev
, IFF_SLAVE
, GFP_KERNEL
);
1167 static struct slave
*bond_alloc_slave(struct bonding
*bond
)
1169 struct slave
*slave
= NULL
;
1171 slave
= kzalloc(sizeof(struct slave
), GFP_KERNEL
);
1175 if (BOND_MODE(bond
) == BOND_MODE_8023AD
) {
1176 SLAVE_AD_INFO(slave
) = kzalloc(sizeof(struct ad_slave_info
),
1178 if (!SLAVE_AD_INFO(slave
)) {
1186 static void bond_free_slave(struct slave
*slave
)
1188 struct bonding
*bond
= bond_get_bond_by_slave(slave
);
1190 if (BOND_MODE(bond
) == BOND_MODE_8023AD
)
1191 kfree(SLAVE_AD_INFO(slave
));
1196 /* enslave device <slave> to bond device <master> */
1197 int bond_enslave(struct net_device
*bond_dev
, struct net_device
*slave_dev
)
1199 struct bonding
*bond
= netdev_priv(bond_dev
);
1200 const struct net_device_ops
*slave_ops
= slave_dev
->netdev_ops
;
1201 struct slave
*new_slave
= NULL
, *prev_slave
;
1202 struct sockaddr addr
;
1206 if (!bond
->params
.use_carrier
&&
1207 slave_dev
->ethtool_ops
->get_link
== NULL
&&
1208 slave_ops
->ndo_do_ioctl
== NULL
) {
1209 netdev_warn(bond_dev
, "no link monitoring support for %s\n",
1213 /* already enslaved */
1214 if (slave_dev
->flags
& IFF_SLAVE
) {
1215 netdev_dbg(bond_dev
, "Error: Device was already enslaved\n");
1219 if (bond_dev
== slave_dev
) {
1220 netdev_err(bond_dev
, "cannot enslave bond to itself.\n");
1224 /* vlan challenged mutual exclusion */
1225 /* no need to lock since we're protected by rtnl_lock */
1226 if (slave_dev
->features
& NETIF_F_VLAN_CHALLENGED
) {
1227 netdev_dbg(bond_dev
, "%s is NETIF_F_VLAN_CHALLENGED\n",
1229 if (vlan_uses_dev(bond_dev
)) {
1230 netdev_err(bond_dev
, "Error: cannot enslave VLAN challenged slave %s on VLAN enabled bond %s\n",
1231 slave_dev
->name
, bond_dev
->name
);
1234 netdev_warn(bond_dev
, "enslaved VLAN challenged slave %s. Adding VLANs will be blocked as long as %s is part of bond %s\n",
1235 slave_dev
->name
, slave_dev
->name
,
1239 netdev_dbg(bond_dev
, "%s is !NETIF_F_VLAN_CHALLENGED\n",
1244 * Old ifenslave binaries are no longer supported. These can
1245 * be identified with moderate accuracy by the state of the slave:
1246 * the current ifenslave will set the interface down prior to
1247 * enslaving it; the old ifenslave will not.
1249 if ((slave_dev
->flags
& IFF_UP
)) {
1250 netdev_err(bond_dev
, "%s is up - this may be due to an out of date ifenslave\n",
1253 goto err_undo_flags
;
1256 /* set bonding device ether type by slave - bonding netdevices are
1257 * created with ether_setup, so when the slave type is not ARPHRD_ETHER
1258 * there is a need to override some of the type dependent attribs/funcs.
1260 * bond ether type mutual exclusion - don't allow slaves of dissimilar
1261 * ether type (eg ARPHRD_ETHER and ARPHRD_INFINIBAND) share the same bond
1263 if (!bond_has_slaves(bond
)) {
1264 if (bond_dev
->type
!= slave_dev
->type
) {
1265 netdev_dbg(bond_dev
, "change device type from %d to %d\n",
1266 bond_dev
->type
, slave_dev
->type
);
1268 res
= call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE
,
1270 res
= notifier_to_errno(res
);
1272 netdev_err(bond_dev
, "refused to change device type\n");
1274 goto err_undo_flags
;
1277 /* Flush unicast and multicast addresses */
1278 dev_uc_flush(bond_dev
);
1279 dev_mc_flush(bond_dev
);
1281 if (slave_dev
->type
!= ARPHRD_ETHER
)
1282 bond_setup_by_slave(bond_dev
, slave_dev
);
1284 ether_setup(bond_dev
);
1285 bond_dev
->priv_flags
&= ~IFF_TX_SKB_SHARING
;
1288 call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE
,
1291 } else if (bond_dev
->type
!= slave_dev
->type
) {
1292 netdev_err(bond_dev
, "%s ether type (%d) is different from other slaves (%d), can not enslave it\n",
1293 slave_dev
->name
, slave_dev
->type
, bond_dev
->type
);
1295 goto err_undo_flags
;
1298 if (slave_ops
->ndo_set_mac_address
== NULL
) {
1299 netdev_warn(bond_dev
, "The slave device specified does not support setting the MAC address\n");
1300 if (BOND_MODE(bond
) == BOND_MODE_ACTIVEBACKUP
&&
1301 bond
->params
.fail_over_mac
!= BOND_FOM_ACTIVE
) {
1302 if (!bond_has_slaves(bond
)) {
1303 bond
->params
.fail_over_mac
= BOND_FOM_ACTIVE
;
1304 netdev_warn(bond_dev
, "Setting fail_over_mac to active for active-backup mode\n");
1306 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");
1308 goto err_undo_flags
;
1313 call_netdevice_notifiers(NETDEV_JOIN
, slave_dev
);
1315 /* If this is the first slave, then we need to set the master's hardware
1316 * address to be the same as the slave's. */
1317 if (!bond_has_slaves(bond
) &&
1318 bond
->dev
->addr_assign_type
== NET_ADDR_RANDOM
)
1319 bond_set_dev_addr(bond
->dev
, slave_dev
);
1321 new_slave
= bond_alloc_slave(bond
);
1324 goto err_undo_flags
;
1327 new_slave
->bond
= bond
;
1328 new_slave
->dev
= slave_dev
;
1330 * Set the new_slave's queue_id to be zero. Queue ID mapping
1331 * is set via sysfs or module option if desired.
1333 new_slave
->queue_id
= 0;
1335 /* Save slave's original mtu and then set it to match the bond */
1336 new_slave
->original_mtu
= slave_dev
->mtu
;
1337 res
= dev_set_mtu(slave_dev
, bond
->dev
->mtu
);
1339 netdev_dbg(bond_dev
, "Error %d calling dev_set_mtu\n", res
);
1344 * Save slave's original ("permanent") mac address for modes
1345 * that need it, and for restoring it upon release, and then
1346 * set it to the master's address
1348 ether_addr_copy(new_slave
->perm_hwaddr
, slave_dev
->dev_addr
);
1350 if (!bond
->params
.fail_over_mac
||
1351 BOND_MODE(bond
) != BOND_MODE_ACTIVEBACKUP
) {
1353 * Set slave to master's mac address. The application already
1354 * set the master's mac address to that of the first slave
1356 memcpy(addr
.sa_data
, bond_dev
->dev_addr
, bond_dev
->addr_len
);
1357 addr
.sa_family
= slave_dev
->type
;
1358 res
= dev_set_mac_address(slave_dev
, &addr
);
1360 netdev_dbg(bond_dev
, "Error %d calling set_mac_address\n", res
);
1361 goto err_restore_mtu
;
1365 /* open the slave since the application closed it */
1366 res
= dev_open(slave_dev
);
1368 netdev_dbg(bond_dev
, "Opening slave %s failed\n", slave_dev
->name
);
1369 goto err_restore_mac
;
1372 slave_dev
->priv_flags
|= IFF_BONDING
;
1374 if (bond_is_lb(bond
)) {
1375 /* bond_alb_init_slave() must be called before all other stages since
1376 * it might fail and we do not want to have to undo everything
1378 res
= bond_alb_init_slave(bond
, new_slave
);
1383 /* If the mode uses primary, then the following is handled by
1384 * bond_change_active_slave().
1386 if (!bond_uses_primary(bond
)) {
1387 /* set promiscuity level to new slave */
1388 if (bond_dev
->flags
& IFF_PROMISC
) {
1389 res
= dev_set_promiscuity(slave_dev
, 1);
1394 /* set allmulti level to new slave */
1395 if (bond_dev
->flags
& IFF_ALLMULTI
) {
1396 res
= dev_set_allmulti(slave_dev
, 1);
1401 netif_addr_lock_bh(bond_dev
);
1403 dev_mc_sync_multiple(slave_dev
, bond_dev
);
1404 dev_uc_sync_multiple(slave_dev
, bond_dev
);
1406 netif_addr_unlock_bh(bond_dev
);
1409 if (BOND_MODE(bond
) == BOND_MODE_8023AD
) {
1410 /* add lacpdu mc addr to mc list */
1411 u8 lacpdu_multicast
[ETH_ALEN
] = MULTICAST_LACPDU_ADDR
;
1413 dev_mc_add(slave_dev
, lacpdu_multicast
);
1416 res
= vlan_vids_add_by_dev(slave_dev
, bond_dev
);
1418 netdev_err(bond_dev
, "Couldn't add bond vlan ids to %s\n",
1423 prev_slave
= bond_last_slave(bond
);
1425 new_slave
->delay
= 0;
1426 new_slave
->link_failure_count
= 0;
1428 bond_update_speed_duplex(new_slave
);
1430 new_slave
->last_rx
= jiffies
-
1431 (msecs_to_jiffies(bond
->params
.arp_interval
) + 1);
1432 for (i
= 0; i
< BOND_MAX_ARP_TARGETS
; i
++)
1433 new_slave
->target_last_arp_rx
[i
] = new_slave
->last_rx
;
1435 if (bond
->params
.miimon
&& !bond
->params
.use_carrier
) {
1436 link_reporting
= bond_check_dev_link(bond
, slave_dev
, 1);
1438 if ((link_reporting
== -1) && !bond
->params
.arp_interval
) {
1440 * miimon is set but a bonded network driver
1441 * does not support ETHTOOL/MII and
1442 * arp_interval is not set. Note: if
1443 * use_carrier is enabled, we will never go
1444 * here (because netif_carrier is always
1445 * supported); thus, we don't need to change
1446 * the messages for netif_carrier.
1448 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",
1450 } else if (link_reporting
== -1) {
1451 /* unable get link status using mii/ethtool */
1452 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",
1457 /* check for initial state */
1458 if (bond
->params
.miimon
) {
1459 if (bond_check_dev_link(bond
, slave_dev
, 0) == BMSR_LSTATUS
) {
1460 if (bond
->params
.updelay
) {
1461 new_slave
->link
= BOND_LINK_BACK
;
1462 new_slave
->delay
= bond
->params
.updelay
;
1464 new_slave
->link
= BOND_LINK_UP
;
1467 new_slave
->link
= BOND_LINK_DOWN
;
1469 } else if (bond
->params
.arp_interval
) {
1470 new_slave
->link
= (netif_carrier_ok(slave_dev
) ?
1471 BOND_LINK_UP
: BOND_LINK_DOWN
);
1473 new_slave
->link
= BOND_LINK_UP
;
1476 if (new_slave
->link
!= BOND_LINK_DOWN
)
1477 new_slave
->last_link_up
= jiffies
;
1478 netdev_dbg(bond_dev
, "Initial state of slave_dev is BOND_LINK_%s\n",
1479 new_slave
->link
== BOND_LINK_DOWN
? "DOWN" :
1480 (new_slave
->link
== BOND_LINK_UP
? "UP" : "BACK"));
1482 if (bond_uses_primary(bond
) && bond
->params
.primary
[0]) {
1483 /* if there is a primary slave, remember it */
1484 if (strcmp(bond
->params
.primary
, new_slave
->dev
->name
) == 0) {
1485 bond
->primary_slave
= new_slave
;
1486 bond
->force_primary
= true;
1490 switch (BOND_MODE(bond
)) {
1491 case BOND_MODE_ACTIVEBACKUP
:
1492 bond_set_slave_inactive_flags(new_slave
,
1493 BOND_SLAVE_NOTIFY_NOW
);
1495 case BOND_MODE_8023AD
:
1496 /* in 802.3ad mode, the internal mechanism
1497 * will activate the slaves in the selected
1500 bond_set_slave_inactive_flags(new_slave
, BOND_SLAVE_NOTIFY_NOW
);
1501 /* if this is the first slave */
1503 SLAVE_AD_INFO(new_slave
)->id
= 1;
1504 /* Initialize AD with the number of times that the AD timer is called in 1 second
1505 * can be called only after the mac address of the bond is set
1507 bond_3ad_initialize(bond
, 1000/AD_TIMER_INTERVAL
);
1509 SLAVE_AD_INFO(new_slave
)->id
=
1510 SLAVE_AD_INFO(prev_slave
)->id
+ 1;
1513 bond_3ad_bind_slave(new_slave
);
1517 bond_set_active_slave(new_slave
);
1518 bond_set_slave_inactive_flags(new_slave
, BOND_SLAVE_NOTIFY_NOW
);
1521 netdev_dbg(bond_dev
, "This slave is always active in trunk mode\n");
1523 /* always active in trunk mode */
1524 bond_set_active_slave(new_slave
);
1526 /* In trunking mode there is little meaning to curr_active_slave
1527 * anyway (it holds no special properties of the bond device),
1528 * so we can change it without calling change_active_interface()
1530 if (!rcu_access_pointer(bond
->curr_active_slave
) &&
1531 new_slave
->link
== BOND_LINK_UP
)
1532 rcu_assign_pointer(bond
->curr_active_slave
, new_slave
);
1535 } /* switch(bond_mode) */
1537 #ifdef CONFIG_NET_POLL_CONTROLLER
1538 slave_dev
->npinfo
= bond
->dev
->npinfo
;
1539 if (slave_dev
->npinfo
) {
1540 if (slave_enable_netpoll(new_slave
)) {
1541 netdev_info(bond_dev
, "master_dev is using netpoll, but new slave device does not support netpoll\n");
1548 res
= netdev_rx_handler_register(slave_dev
, bond_handle_frame
,
1551 netdev_dbg(bond_dev
, "Error %d calling netdev_rx_handler_register\n", res
);
1555 res
= bond_master_upper_dev_link(bond_dev
, slave_dev
, new_slave
);
1557 netdev_dbg(bond_dev
, "Error %d calling bond_master_upper_dev_link\n", res
);
1558 goto err_unregister
;
1561 res
= bond_sysfs_slave_add(new_slave
);
1563 netdev_dbg(bond_dev
, "Error %d calling bond_sysfs_slave_add\n", res
);
1564 goto err_upper_unlink
;
1568 bond_compute_features(bond
);
1569 bond_set_carrier(bond
);
1571 if (bond_uses_primary(bond
)) {
1573 write_lock_bh(&bond
->curr_slave_lock
);
1574 bond_select_active_slave(bond
);
1575 write_unlock_bh(&bond
->curr_slave_lock
);
1576 unblock_netpoll_tx();
1579 netdev_info(bond_dev
, "Enslaving %s as %s interface with %s link\n",
1581 bond_is_active_slave(new_slave
) ? "an active" : "a backup",
1582 new_slave
->link
!= BOND_LINK_DOWN
? "an up" : "a down");
1584 /* enslave is successful */
1587 /* Undo stages on error */
1589 bond_upper_dev_unlink(bond_dev
, slave_dev
);
1592 netdev_rx_handler_unregister(slave_dev
);
1595 if (!bond_uses_primary(bond
))
1596 bond_hw_addr_flush(bond_dev
, slave_dev
);
1598 vlan_vids_del_by_dev(slave_dev
, bond_dev
);
1599 if (bond
->primary_slave
== new_slave
)
1600 bond
->primary_slave
= NULL
;
1601 if (rcu_access_pointer(bond
->curr_active_slave
) == new_slave
) {
1603 write_lock_bh(&bond
->curr_slave_lock
);
1604 bond_change_active_slave(bond
, NULL
);
1605 bond_select_active_slave(bond
);
1606 write_unlock_bh(&bond
->curr_slave_lock
);
1607 unblock_netpoll_tx();
1609 slave_disable_netpoll(new_slave
);
1612 slave_dev
->priv_flags
&= ~IFF_BONDING
;
1613 dev_close(slave_dev
);
1616 if (!bond
->params
.fail_over_mac
||
1617 BOND_MODE(bond
) != BOND_MODE_ACTIVEBACKUP
) {
1618 /* XXX TODO - fom follow mode needs to change master's
1619 * MAC if this slave's MAC is in use by the bond, or at
1620 * least print a warning.
1622 ether_addr_copy(addr
.sa_data
, new_slave
->perm_hwaddr
);
1623 addr
.sa_family
= slave_dev
->type
;
1624 dev_set_mac_address(slave_dev
, &addr
);
1628 dev_set_mtu(slave_dev
, new_slave
->original_mtu
);
1631 bond_free_slave(new_slave
);
1634 /* Enslave of first slave has failed and we need to fix master's mac */
1635 if (!bond_has_slaves(bond
) &&
1636 ether_addr_equal_64bits(bond_dev
->dev_addr
, slave_dev
->dev_addr
))
1637 eth_hw_addr_random(bond_dev
);
1643 * Try to release the slave device <slave> from the bond device <master>
1644 * It is legal to access curr_active_slave without a lock because all the function
1645 * is write-locked. If "all" is true it means that the function is being called
1646 * while destroying a bond interface and all slaves are being released.
1648 * The rules for slave state should be:
1649 * for Active/Backup:
1650 * Active stays on all backups go down
1651 * for Bonded connections:
1652 * The first up interface should be left on and all others downed.
1654 static int __bond_release_one(struct net_device
*bond_dev
,
1655 struct net_device
*slave_dev
,
1658 struct bonding
*bond
= netdev_priv(bond_dev
);
1659 struct slave
*slave
, *oldcurrent
;
1660 struct sockaddr addr
;
1661 int old_flags
= bond_dev
->flags
;
1662 netdev_features_t old_features
= bond_dev
->features
;
1664 /* slave is not a slave or master is not master of this slave */
1665 if (!(slave_dev
->flags
& IFF_SLAVE
) ||
1666 !netdev_has_upper_dev(slave_dev
, bond_dev
)) {
1667 netdev_err(bond_dev
, "cannot release %s\n",
1674 slave
= bond_get_slave_by_dev(bond
, slave_dev
);
1676 /* not a slave of this bond */
1677 netdev_info(bond_dev
, "%s not enslaved\n",
1679 unblock_netpoll_tx();
1683 bond_sysfs_slave_del(slave
);
1685 bond_upper_dev_unlink(bond_dev
, slave_dev
);
1686 /* unregister rx_handler early so bond_handle_frame wouldn't be called
1687 * for this slave anymore.
1689 netdev_rx_handler_unregister(slave_dev
);
1690 write_lock_bh(&bond
->lock
);
1692 /* Inform AD package of unbinding of slave. */
1693 if (BOND_MODE(bond
) == BOND_MODE_8023AD
)
1694 bond_3ad_unbind_slave(slave
);
1696 write_unlock_bh(&bond
->lock
);
1698 netdev_info(bond_dev
, "Releasing %s interface %s\n",
1699 bond_is_active_slave(slave
) ? "active" : "backup",
1702 oldcurrent
= rcu_access_pointer(bond
->curr_active_slave
);
1704 RCU_INIT_POINTER(bond
->current_arp_slave
, NULL
);
1706 if (!all
&& (!bond
->params
.fail_over_mac
||
1707 BOND_MODE(bond
) != BOND_MODE_ACTIVEBACKUP
)) {
1708 if (ether_addr_equal_64bits(bond_dev
->dev_addr
, slave
->perm_hwaddr
) &&
1709 bond_has_slaves(bond
))
1710 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",
1711 slave_dev
->name
, slave
->perm_hwaddr
,
1712 bond_dev
->name
, slave_dev
->name
);
1715 if (bond
->primary_slave
== slave
)
1716 bond
->primary_slave
= NULL
;
1718 if (oldcurrent
== slave
) {
1719 write_lock_bh(&bond
->curr_slave_lock
);
1720 bond_change_active_slave(bond
, NULL
);
1721 write_unlock_bh(&bond
->curr_slave_lock
);
1724 if (bond_is_lb(bond
)) {
1725 /* Must be called only after the slave has been
1726 * detached from the list and the curr_active_slave
1727 * has been cleared (if our_slave == old_current),
1728 * but before a new active slave is selected.
1730 bond_alb_deinit_slave(bond
, slave
);
1734 RCU_INIT_POINTER(bond
->curr_active_slave
, NULL
);
1735 } else if (oldcurrent
== slave
) {
1737 * Note that we hold RTNL over this sequence, so there
1738 * is no concern that another slave add/remove event
1741 write_lock_bh(&bond
->curr_slave_lock
);
1743 bond_select_active_slave(bond
);
1745 write_unlock_bh(&bond
->curr_slave_lock
);
1748 if (!bond_has_slaves(bond
)) {
1749 bond_set_carrier(bond
);
1750 eth_hw_addr_random(bond_dev
);
1753 unblock_netpoll_tx();
1757 if (!bond_has_slaves(bond
)) {
1758 call_netdevice_notifiers(NETDEV_CHANGEADDR
, bond
->dev
);
1759 call_netdevice_notifiers(NETDEV_RELEASE
, bond
->dev
);
1762 bond_compute_features(bond
);
1763 if (!(bond_dev
->features
& NETIF_F_VLAN_CHALLENGED
) &&
1764 (old_features
& NETIF_F_VLAN_CHALLENGED
))
1765 netdev_info(bond_dev
, "last VLAN challenged slave %s left bond %s - VLAN blocking is removed\n",
1766 slave_dev
->name
, bond_dev
->name
);
1768 /* must do this from outside any spinlocks */
1769 vlan_vids_del_by_dev(slave_dev
, bond_dev
);
1771 /* If the mode uses primary, then this cases was handled above by
1772 * bond_change_active_slave(..., NULL)
1774 if (!bond_uses_primary(bond
)) {
1775 /* unset promiscuity level from slave
1776 * NOTE: The NETDEV_CHANGEADDR call above may change the value
1777 * of the IFF_PROMISC flag in the bond_dev, but we need the
1778 * value of that flag before that change, as that was the value
1779 * when this slave was attached, so we cache at the start of the
1780 * function and use it here. Same goes for ALLMULTI below
1782 if (old_flags
& IFF_PROMISC
)
1783 dev_set_promiscuity(slave_dev
, -1);
1785 /* unset allmulti level from slave */
1786 if (old_flags
& IFF_ALLMULTI
)
1787 dev_set_allmulti(slave_dev
, -1);
1789 bond_hw_addr_flush(bond_dev
, slave_dev
);
1792 slave_disable_netpoll(slave
);
1794 /* close slave before restoring its mac address */
1795 dev_close(slave_dev
);
1797 if (bond
->params
.fail_over_mac
!= BOND_FOM_ACTIVE
||
1798 BOND_MODE(bond
) != BOND_MODE_ACTIVEBACKUP
) {
1799 /* restore original ("permanent") mac address */
1800 ether_addr_copy(addr
.sa_data
, slave
->perm_hwaddr
);
1801 addr
.sa_family
= slave_dev
->type
;
1802 dev_set_mac_address(slave_dev
, &addr
);
1805 dev_set_mtu(slave_dev
, slave
->original_mtu
);
1807 slave_dev
->priv_flags
&= ~IFF_BONDING
;
1809 bond_free_slave(slave
);
1811 return 0; /* deletion OK */
1814 /* A wrapper used because of ndo_del_link */
1815 int bond_release(struct net_device
*bond_dev
, struct net_device
*slave_dev
)
1817 return __bond_release_one(bond_dev
, slave_dev
, false);
1821 * First release a slave and then destroy the bond if no more slaves are left.
1822 * Must be under rtnl_lock when this function is called.
1824 static int bond_release_and_destroy(struct net_device
*bond_dev
,
1825 struct net_device
*slave_dev
)
1827 struct bonding
*bond
= netdev_priv(bond_dev
);
1830 ret
= bond_release(bond_dev
, slave_dev
);
1831 if (ret
== 0 && !bond_has_slaves(bond
)) {
1832 bond_dev
->priv_flags
|= IFF_DISABLE_NETPOLL
;
1833 netdev_info(bond_dev
, "Destroying bond %s\n",
1835 unregister_netdevice(bond_dev
);
1840 static int bond_info_query(struct net_device
*bond_dev
, struct ifbond
*info
)
1842 struct bonding
*bond
= netdev_priv(bond_dev
);
1844 info
->bond_mode
= BOND_MODE(bond
);
1845 info
->miimon
= bond
->params
.miimon
;
1847 info
->num_slaves
= bond
->slave_cnt
;
1852 static int bond_slave_info_query(struct net_device
*bond_dev
, struct ifslave
*info
)
1854 struct bonding
*bond
= netdev_priv(bond_dev
);
1855 struct list_head
*iter
;
1856 int i
= 0, res
= -ENODEV
;
1857 struct slave
*slave
;
1859 bond_for_each_slave(bond
, slave
, iter
) {
1860 if (i
++ == (int)info
->slave_id
) {
1862 strcpy(info
->slave_name
, slave
->dev
->name
);
1863 info
->link
= slave
->link
;
1864 info
->state
= bond_slave_state(slave
);
1865 info
->link_failure_count
= slave
->link_failure_count
;
1873 /*-------------------------------- Monitoring -------------------------------*/
1875 /* called with rcu_read_lock() */
1876 static int bond_miimon_inspect(struct bonding
*bond
)
1878 int link_state
, commit
= 0;
1879 struct list_head
*iter
;
1880 struct slave
*slave
;
1881 bool ignore_updelay
;
1883 ignore_updelay
= !rcu_dereference(bond
->curr_active_slave
);
1885 bond_for_each_slave_rcu(bond
, slave
, iter
) {
1886 slave
->new_link
= BOND_LINK_NOCHANGE
;
1888 link_state
= bond_check_dev_link(bond
, slave
->dev
, 0);
1890 switch (slave
->link
) {
1895 slave
->link
= BOND_LINK_FAIL
;
1896 slave
->delay
= bond
->params
.downdelay
;
1898 netdev_info(bond
->dev
, "link status down for %sinterface %s, disabling it in %d ms\n",
1900 BOND_MODE_ACTIVEBACKUP
) ?
1901 (bond_is_active_slave(slave
) ?
1902 "active " : "backup ") : "",
1904 bond
->params
.downdelay
* bond
->params
.miimon
);
1907 case BOND_LINK_FAIL
:
1910 * recovered before downdelay expired
1912 slave
->link
= BOND_LINK_UP
;
1913 slave
->last_link_up
= jiffies
;
1914 netdev_info(bond
->dev
, "link status up again after %d ms for interface %s\n",
1915 (bond
->params
.downdelay
- slave
->delay
) *
1916 bond
->params
.miimon
,
1921 if (slave
->delay
<= 0) {
1922 slave
->new_link
= BOND_LINK_DOWN
;
1930 case BOND_LINK_DOWN
:
1934 slave
->link
= BOND_LINK_BACK
;
1935 slave
->delay
= bond
->params
.updelay
;
1938 netdev_info(bond
->dev
, "link status up for interface %s, enabling it in %d ms\n",
1940 ignore_updelay
? 0 :
1941 bond
->params
.updelay
*
1942 bond
->params
.miimon
);
1945 case BOND_LINK_BACK
:
1947 slave
->link
= BOND_LINK_DOWN
;
1948 netdev_info(bond
->dev
, "link status down again after %d ms for interface %s\n",
1949 (bond
->params
.updelay
- slave
->delay
) *
1950 bond
->params
.miimon
,
1959 if (slave
->delay
<= 0) {
1960 slave
->new_link
= BOND_LINK_UP
;
1962 ignore_updelay
= false;
1974 static void bond_miimon_commit(struct bonding
*bond
)
1976 struct list_head
*iter
;
1977 struct slave
*slave
;
1979 bond_for_each_slave(bond
, slave
, iter
) {
1980 switch (slave
->new_link
) {
1981 case BOND_LINK_NOCHANGE
:
1985 slave
->link
= BOND_LINK_UP
;
1986 slave
->last_link_up
= jiffies
;
1988 if (BOND_MODE(bond
) == BOND_MODE_8023AD
) {
1989 /* prevent it from being the active one */
1990 bond_set_backup_slave(slave
);
1991 } else if (BOND_MODE(bond
) != BOND_MODE_ACTIVEBACKUP
) {
1992 /* make it immediately active */
1993 bond_set_active_slave(slave
);
1994 } else if (slave
!= bond
->primary_slave
) {
1995 /* prevent it from being the active one */
1996 bond_set_backup_slave(slave
);
1999 netdev_info(bond
->dev
, "link status definitely up for interface %s, %u Mbps %s duplex\n",
2001 slave
->speed
== SPEED_UNKNOWN
? 0 : slave
->speed
,
2002 slave
->duplex
? "full" : "half");
2004 /* notify ad that the link status has changed */
2005 if (BOND_MODE(bond
) == BOND_MODE_8023AD
)
2006 bond_3ad_handle_link_change(slave
, BOND_LINK_UP
);
2008 if (bond_is_lb(bond
))
2009 bond_alb_handle_link_change(bond
, slave
,
2012 if (!bond
->curr_active_slave
||
2013 (slave
== bond
->primary_slave
))
2018 case BOND_LINK_DOWN
:
2019 if (slave
->link_failure_count
< UINT_MAX
)
2020 slave
->link_failure_count
++;
2022 slave
->link
= BOND_LINK_DOWN
;
2024 if (BOND_MODE(bond
) == BOND_MODE_ACTIVEBACKUP
||
2025 BOND_MODE(bond
) == BOND_MODE_8023AD
)
2026 bond_set_slave_inactive_flags(slave
,
2027 BOND_SLAVE_NOTIFY_NOW
);
2029 netdev_info(bond
->dev
, "link status definitely down for interface %s, disabling it\n",
2032 if (BOND_MODE(bond
) == BOND_MODE_8023AD
)
2033 bond_3ad_handle_link_change(slave
,
2036 if (bond_is_lb(bond
))
2037 bond_alb_handle_link_change(bond
, slave
,
2040 if (slave
== rcu_access_pointer(bond
->curr_active_slave
))
2046 netdev_err(bond
->dev
, "invalid new link %d on slave %s\n",
2047 slave
->new_link
, slave
->dev
->name
);
2048 slave
->new_link
= BOND_LINK_NOCHANGE
;
2056 write_lock_bh(&bond
->curr_slave_lock
);
2057 bond_select_active_slave(bond
);
2058 write_unlock_bh(&bond
->curr_slave_lock
);
2059 unblock_netpoll_tx();
2062 bond_set_carrier(bond
);
2068 * Really a wrapper that splits the mii monitor into two phases: an
2069 * inspection, then (if inspection indicates something needs to be done)
2070 * an acquisition of appropriate locks followed by a commit phase to
2071 * implement whatever link state changes are indicated.
2073 static void bond_mii_monitor(struct work_struct
*work
)
2075 struct bonding
*bond
= container_of(work
, struct bonding
,
2077 bool should_notify_peers
= false;
2078 unsigned long delay
;
2080 delay
= msecs_to_jiffies(bond
->params
.miimon
);
2082 if (!bond_has_slaves(bond
))
2087 should_notify_peers
= bond_should_notify_peers(bond
);
2089 if (bond_miimon_inspect(bond
)) {
2092 /* Race avoidance with bond_close cancel of workqueue */
2093 if (!rtnl_trylock()) {
2095 should_notify_peers
= false;
2099 bond_miimon_commit(bond
);
2101 rtnl_unlock(); /* might sleep, hold no other locks */
2106 if (bond
->params
.miimon
)
2107 queue_delayed_work(bond
->wq
, &bond
->mii_work
, delay
);
2109 if (should_notify_peers
) {
2110 if (!rtnl_trylock())
2112 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS
, bond
->dev
);
2117 static bool bond_has_this_ip(struct bonding
*bond
, __be32 ip
)
2119 struct net_device
*upper
;
2120 struct list_head
*iter
;
2123 if (ip
== bond_confirm_addr(bond
->dev
, 0, ip
))
2127 netdev_for_each_all_upper_dev_rcu(bond
->dev
, upper
, iter
) {
2128 if (ip
== bond_confirm_addr(upper
, 0, ip
)) {
2139 * We go to the (large) trouble of VLAN tagging ARP frames because
2140 * switches in VLAN mode (especially if ports are configured as
2141 * "native" to a VLAN) might not pass non-tagged frames.
2143 static void bond_arp_send(struct net_device
*slave_dev
, int arp_op
,
2144 __be32 dest_ip
, __be32 src_ip
,
2145 struct bond_vlan_tag
*tags
)
2147 struct sk_buff
*skb
;
2148 struct bond_vlan_tag
*outer_tag
= tags
;
2150 netdev_dbg(slave_dev
, "arp %d on slave %s: dst %pI4 src %pI4\n",
2151 arp_op
, slave_dev
->name
, &dest_ip
, &src_ip
);
2153 skb
= arp_create(arp_op
, ETH_P_ARP
, dest_ip
, slave_dev
, src_ip
,
2154 NULL
, slave_dev
->dev_addr
, NULL
);
2157 net_err_ratelimited("ARP packet allocation failed\n");
2161 if (!tags
|| tags
->vlan_proto
== VLAN_N_VID
)
2166 /* Go through all the tags backwards and add them to the packet */
2167 while (tags
->vlan_proto
!= VLAN_N_VID
) {
2168 if (!tags
->vlan_id
) {
2173 netdev_dbg(slave_dev
, "inner tag: proto %X vid %X\n",
2174 ntohs(outer_tag
->vlan_proto
), tags
->vlan_id
);
2175 skb
= __vlan_put_tag(skb
, tags
->vlan_proto
,
2178 net_err_ratelimited("failed to insert inner VLAN tag\n");
2184 /* Set the outer tag */
2185 if (outer_tag
->vlan_id
) {
2186 netdev_dbg(slave_dev
, "outer tag: proto %X vid %X\n",
2187 ntohs(outer_tag
->vlan_proto
), outer_tag
->vlan_id
);
2188 skb
= vlan_put_tag(skb
, outer_tag
->vlan_proto
,
2189 outer_tag
->vlan_id
);
2191 net_err_ratelimited("failed to insert outer VLAN tag\n");
2200 /* Validate the device path between the @start_dev and the @end_dev.
2201 * The path is valid if the @end_dev is reachable through device
2203 * When the path is validated, collect any vlan information in the
2206 struct bond_vlan_tag
*bond_verify_device_path(struct net_device
*start_dev
,
2207 struct net_device
*end_dev
,
2210 struct bond_vlan_tag
*tags
;
2211 struct net_device
*upper
;
2212 struct list_head
*iter
;
2214 if (start_dev
== end_dev
) {
2215 tags
= kzalloc(sizeof(*tags
) * (level
+ 1), GFP_ATOMIC
);
2217 return ERR_PTR(-ENOMEM
);
2218 tags
[level
].vlan_proto
= VLAN_N_VID
;
2222 netdev_for_each_upper_dev_rcu(start_dev
, upper
, iter
) {
2223 tags
= bond_verify_device_path(upper
, end_dev
, level
+ 1);
2224 if (IS_ERR_OR_NULL(tags
)) {
2229 if (is_vlan_dev(upper
)) {
2230 tags
[level
].vlan_proto
= vlan_dev_vlan_proto(upper
);
2231 tags
[level
].vlan_id
= vlan_dev_vlan_id(upper
);
2240 static void bond_arp_send_all(struct bonding
*bond
, struct slave
*slave
)
2243 struct bond_vlan_tag
*tags
;
2244 __be32
*targets
= bond
->params
.arp_targets
, addr
;
2247 for (i
= 0; i
< BOND_MAX_ARP_TARGETS
&& targets
[i
]; i
++) {
2248 netdev_dbg(bond
->dev
, "basa: target %pI4\n", &targets
[i
]);
2251 /* Find out through which dev should the packet go */
2252 rt
= ip_route_output(dev_net(bond
->dev
), targets
[i
], 0,
2255 /* there's no route to target - try to send arp
2256 * probe to generate any traffic (arp_validate=0)
2258 if (bond
->params
.arp_validate
)
2259 net_warn_ratelimited("%s: no route to arp_ip_target %pI4 and arp_validate is set\n",
2262 bond_arp_send(slave
->dev
, ARPOP_REQUEST
, targets
[i
],
2267 /* bond device itself */
2268 if (rt
->dst
.dev
== bond
->dev
)
2272 tags
= bond_verify_device_path(bond
->dev
, rt
->dst
.dev
, 0);
2275 if (!IS_ERR_OR_NULL(tags
))
2278 /* Not our device - skip */
2279 netdev_dbg(bond
->dev
, "no path to arp_ip_target %pI4 via rt.dev %s\n",
2280 &targets
[i
], rt
->dst
.dev
? rt
->dst
.dev
->name
: "NULL");
2286 addr
= bond_confirm_addr(rt
->dst
.dev
, targets
[i
], 0);
2288 bond_arp_send(slave
->dev
, ARPOP_REQUEST
, targets
[i
],
2295 static void bond_validate_arp(struct bonding
*bond
, struct slave
*slave
, __be32 sip
, __be32 tip
)
2299 if (!sip
|| !bond_has_this_ip(bond
, tip
)) {
2300 netdev_dbg(bond
->dev
, "bva: sip %pI4 tip %pI4 not found\n",
2305 i
= bond_get_targets_ip(bond
->params
.arp_targets
, sip
);
2307 netdev_dbg(bond
->dev
, "bva: sip %pI4 not found in targets\n",
2311 slave
->last_rx
= jiffies
;
2312 slave
->target_last_arp_rx
[i
] = jiffies
;
2315 int bond_arp_rcv(const struct sk_buff
*skb
, struct bonding
*bond
,
2316 struct slave
*slave
)
2318 struct arphdr
*arp
= (struct arphdr
*)skb
->data
;
2319 struct slave
*curr_active_slave
;
2320 unsigned char *arp_ptr
;
2322 int alen
, is_arp
= skb
->protocol
== __cpu_to_be16(ETH_P_ARP
);
2324 if (!slave_do_arp_validate(bond
, slave
)) {
2325 if ((slave_do_arp_validate_only(bond
) && is_arp
) ||
2326 !slave_do_arp_validate_only(bond
))
2327 slave
->last_rx
= jiffies
;
2328 return RX_HANDLER_ANOTHER
;
2329 } else if (!is_arp
) {
2330 return RX_HANDLER_ANOTHER
;
2333 alen
= arp_hdr_len(bond
->dev
);
2335 netdev_dbg(bond
->dev
, "bond_arp_rcv: skb->dev %s\n",
2338 if (alen
> skb_headlen(skb
)) {
2339 arp
= kmalloc(alen
, GFP_ATOMIC
);
2342 if (skb_copy_bits(skb
, 0, arp
, alen
) < 0)
2346 if (arp
->ar_hln
!= bond
->dev
->addr_len
||
2347 skb
->pkt_type
== PACKET_OTHERHOST
||
2348 skb
->pkt_type
== PACKET_LOOPBACK
||
2349 arp
->ar_hrd
!= htons(ARPHRD_ETHER
) ||
2350 arp
->ar_pro
!= htons(ETH_P_IP
) ||
2354 arp_ptr
= (unsigned char *)(arp
+ 1);
2355 arp_ptr
+= bond
->dev
->addr_len
;
2356 memcpy(&sip
, arp_ptr
, 4);
2357 arp_ptr
+= 4 + bond
->dev
->addr_len
;
2358 memcpy(&tip
, arp_ptr
, 4);
2360 netdev_dbg(bond
->dev
, "bond_arp_rcv: %s/%d av %d sv %d sip %pI4 tip %pI4\n",
2361 slave
->dev
->name
, bond_slave_state(slave
),
2362 bond
->params
.arp_validate
, slave_do_arp_validate(bond
, slave
),
2365 curr_active_slave
= rcu_dereference(bond
->curr_active_slave
);
2368 * Backup slaves won't see the ARP reply, but do come through
2369 * here for each ARP probe (so we swap the sip/tip to validate
2370 * the probe). In a "redundant switch, common router" type of
2371 * configuration, the ARP probe will (hopefully) travel from
2372 * the active, through one switch, the router, then the other
2373 * switch before reaching the backup.
2375 * We 'trust' the arp requests if there is an active slave and
2376 * it received valid arp reply(s) after it became active. This
2377 * is done to avoid endless looping when we can't reach the
2378 * arp_ip_target and fool ourselves with our own arp requests.
2381 if (bond_is_active_slave(slave
))
2382 bond_validate_arp(bond
, slave
, sip
, tip
);
2383 else if (curr_active_slave
&&
2384 time_after(slave_last_rx(bond
, curr_active_slave
),
2385 curr_active_slave
->last_link_up
))
2386 bond_validate_arp(bond
, slave
, tip
, sip
);
2389 if (arp
!= (struct arphdr
*)skb
->data
)
2391 return RX_HANDLER_ANOTHER
;
2394 /* function to verify if we're in the arp_interval timeslice, returns true if
2395 * (last_act - arp_interval) <= jiffies <= (last_act + mod * arp_interval +
2396 * arp_interval/2) . the arp_interval/2 is needed for really fast networks.
2398 static bool bond_time_in_interval(struct bonding
*bond
, unsigned long last_act
,
2401 int delta_in_ticks
= msecs_to_jiffies(bond
->params
.arp_interval
);
2403 return time_in_range(jiffies
,
2404 last_act
- delta_in_ticks
,
2405 last_act
+ mod
* delta_in_ticks
+ delta_in_ticks
/2);
2409 * this function is called regularly to monitor each slave's link
2410 * ensuring that traffic is being sent and received when arp monitoring
2411 * is used in load-balancing mode. if the adapter has been dormant, then an
2412 * arp is transmitted to generate traffic. see activebackup_arp_monitor for
2413 * arp monitoring in active backup mode.
2415 static void bond_loadbalance_arp_mon(struct work_struct
*work
)
2417 struct bonding
*bond
= container_of(work
, struct bonding
,
2419 struct slave
*slave
, *oldcurrent
;
2420 struct list_head
*iter
;
2421 int do_failover
= 0, slave_state_changed
= 0;
2423 if (!bond_has_slaves(bond
))
2428 oldcurrent
= rcu_dereference(bond
->curr_active_slave
);
2429 /* see if any of the previous devices are up now (i.e. they have
2430 * xmt and rcv traffic). the curr_active_slave does not come into
2431 * the picture unless it is null. also, slave->last_link_up is not
2432 * needed here because we send an arp on each slave and give a slave
2433 * as long as it needs to get the tx/rx within the delta.
2434 * TODO: what about up/down delay in arp mode? it wasn't here before
2437 bond_for_each_slave_rcu(bond
, slave
, iter
) {
2438 unsigned long trans_start
= dev_trans_start(slave
->dev
);
2440 if (slave
->link
!= BOND_LINK_UP
) {
2441 if (bond_time_in_interval(bond
, trans_start
, 1) &&
2442 bond_time_in_interval(bond
, slave
->last_rx
, 1)) {
2444 slave
->link
= BOND_LINK_UP
;
2445 slave_state_changed
= 1;
2447 /* primary_slave has no meaning in round-robin
2448 * mode. the window of a slave being up and
2449 * curr_active_slave being null after enslaving
2453 netdev_info(bond
->dev
, "link status definitely up for interface %s\n",
2457 netdev_info(bond
->dev
, "interface %s is now up\n",
2462 /* slave->link == BOND_LINK_UP */
2464 /* not all switches will respond to an arp request
2465 * when the source ip is 0, so don't take the link down
2466 * if we don't know our ip yet
2468 if (!bond_time_in_interval(bond
, trans_start
, 2) ||
2469 !bond_time_in_interval(bond
, slave
->last_rx
, 2)) {
2471 slave
->link
= BOND_LINK_DOWN
;
2472 slave_state_changed
= 1;
2474 if (slave
->link_failure_count
< UINT_MAX
)
2475 slave
->link_failure_count
++;
2477 netdev_info(bond
->dev
, "interface %s is now down\n",
2480 if (slave
== oldcurrent
)
2485 /* note: if switch is in round-robin mode, all links
2486 * must tx arp to ensure all links rx an arp - otherwise
2487 * links may oscillate or not come up at all; if switch is
2488 * in something like xor mode, there is nothing we can
2489 * do - all replies will be rx'ed on same link causing slaves
2490 * to be unstable during low/no traffic periods
2492 if (bond_slave_is_up(slave
))
2493 bond_arp_send_all(bond
, slave
);
2498 if (do_failover
|| slave_state_changed
) {
2499 if (!rtnl_trylock())
2502 if (slave_state_changed
) {
2503 bond_slave_state_change(bond
);
2504 } else if (do_failover
) {
2505 /* the bond_select_active_slave must hold RTNL
2506 * and curr_slave_lock for write.
2509 write_lock_bh(&bond
->curr_slave_lock
);
2511 bond_select_active_slave(bond
);
2513 write_unlock_bh(&bond
->curr_slave_lock
);
2514 unblock_netpoll_tx();
2520 if (bond
->params
.arp_interval
)
2521 queue_delayed_work(bond
->wq
, &bond
->arp_work
,
2522 msecs_to_jiffies(bond
->params
.arp_interval
));
2526 * Called to inspect slaves for active-backup mode ARP monitor link state
2527 * changes. Sets new_link in slaves to specify what action should take
2528 * place for the slave. Returns 0 if no changes are found, >0 if changes
2529 * to link states must be committed.
2531 * Called with rcu_read_lock hold.
2533 static int bond_ab_arp_inspect(struct bonding
*bond
)
2535 unsigned long trans_start
, last_rx
;
2536 struct list_head
*iter
;
2537 struct slave
*slave
;
2540 bond_for_each_slave_rcu(bond
, slave
, iter
) {
2541 slave
->new_link
= BOND_LINK_NOCHANGE
;
2542 last_rx
= slave_last_rx(bond
, slave
);
2544 if (slave
->link
!= BOND_LINK_UP
) {
2545 if (bond_time_in_interval(bond
, last_rx
, 1)) {
2546 slave
->new_link
= BOND_LINK_UP
;
2553 * Give slaves 2*delta after being enslaved or made
2554 * active. This avoids bouncing, as the last receive
2555 * times need a full ARP monitor cycle to be updated.
2557 if (bond_time_in_interval(bond
, slave
->last_link_up
, 2))
2561 * Backup slave is down if:
2562 * - No current_arp_slave AND
2563 * - more than 3*delta since last receive AND
2564 * - the bond has an IP address
2566 * Note: a non-null current_arp_slave indicates
2567 * the curr_active_slave went down and we are
2568 * searching for a new one; under this condition
2569 * we only take the curr_active_slave down - this
2570 * gives each slave a chance to tx/rx traffic
2571 * before being taken out
2573 if (!bond_is_active_slave(slave
) &&
2574 !rcu_access_pointer(bond
->current_arp_slave
) &&
2575 !bond_time_in_interval(bond
, last_rx
, 3)) {
2576 slave
->new_link
= BOND_LINK_DOWN
;
2581 * Active slave is down if:
2582 * - more than 2*delta since transmitting OR
2583 * - (more than 2*delta since receive AND
2584 * the bond has an IP address)
2586 trans_start
= dev_trans_start(slave
->dev
);
2587 if (bond_is_active_slave(slave
) &&
2588 (!bond_time_in_interval(bond
, trans_start
, 2) ||
2589 !bond_time_in_interval(bond
, last_rx
, 2))) {
2590 slave
->new_link
= BOND_LINK_DOWN
;
2599 * Called to commit link state changes noted by inspection step of
2600 * active-backup mode ARP monitor.
2602 * Called with RTNL hold.
2604 static void bond_ab_arp_commit(struct bonding
*bond
)
2606 unsigned long trans_start
;
2607 struct list_head
*iter
;
2608 struct slave
*slave
;
2610 bond_for_each_slave(bond
, slave
, iter
) {
2611 switch (slave
->new_link
) {
2612 case BOND_LINK_NOCHANGE
:
2616 trans_start
= dev_trans_start(slave
->dev
);
2617 if (rtnl_dereference(bond
->curr_active_slave
) != slave
||
2618 (!rtnl_dereference(bond
->curr_active_slave
) &&
2619 bond_time_in_interval(bond
, trans_start
, 1))) {
2620 struct slave
*current_arp_slave
;
2622 current_arp_slave
= rtnl_dereference(bond
->current_arp_slave
);
2623 slave
->link
= BOND_LINK_UP
;
2624 if (current_arp_slave
) {
2625 bond_set_slave_inactive_flags(
2627 BOND_SLAVE_NOTIFY_NOW
);
2628 RCU_INIT_POINTER(bond
->current_arp_slave
, NULL
);
2631 netdev_info(bond
->dev
, "link status definitely up for interface %s\n",
2634 if (!rtnl_dereference(bond
->curr_active_slave
) ||
2635 (slave
== bond
->primary_slave
))
2642 case BOND_LINK_DOWN
:
2643 if (slave
->link_failure_count
< UINT_MAX
)
2644 slave
->link_failure_count
++;
2646 slave
->link
= BOND_LINK_DOWN
;
2647 bond_set_slave_inactive_flags(slave
,
2648 BOND_SLAVE_NOTIFY_NOW
);
2650 netdev_info(bond
->dev
, "link status definitely down for interface %s, disabling it\n",
2653 if (slave
== rtnl_dereference(bond
->curr_active_slave
)) {
2654 RCU_INIT_POINTER(bond
->current_arp_slave
, NULL
);
2661 netdev_err(bond
->dev
, "impossible: new_link %d on slave %s\n",
2662 slave
->new_link
, slave
->dev
->name
);
2669 write_lock_bh(&bond
->curr_slave_lock
);
2670 bond_select_active_slave(bond
);
2671 write_unlock_bh(&bond
->curr_slave_lock
);
2672 unblock_netpoll_tx();
2675 bond_set_carrier(bond
);
2679 * Send ARP probes for active-backup mode ARP monitor.
2681 * Called with rcu_read_lock hold.
2683 static bool bond_ab_arp_probe(struct bonding
*bond
)
2685 struct slave
*slave
, *before
= NULL
, *new_slave
= NULL
,
2686 *curr_arp_slave
= rcu_dereference(bond
->current_arp_slave
),
2687 *curr_active_slave
= rcu_dereference(bond
->curr_active_slave
);
2688 struct list_head
*iter
;
2690 bool should_notify_rtnl
= BOND_SLAVE_NOTIFY_LATER
;
2692 if (curr_arp_slave
&& curr_active_slave
)
2693 netdev_info(bond
->dev
, "PROBE: c_arp %s && cas %s BAD\n",
2694 curr_arp_slave
->dev
->name
,
2695 curr_active_slave
->dev
->name
);
2697 if (curr_active_slave
) {
2698 bond_arp_send_all(bond
, curr_active_slave
);
2699 return should_notify_rtnl
;
2702 /* if we don't have a curr_active_slave, search for the next available
2703 * backup slave from the current_arp_slave and make it the candidate
2704 * for becoming the curr_active_slave
2707 if (!curr_arp_slave
) {
2708 curr_arp_slave
= bond_first_slave_rcu(bond
);
2709 if (!curr_arp_slave
)
2710 return should_notify_rtnl
;
2713 bond_set_slave_inactive_flags(curr_arp_slave
, BOND_SLAVE_NOTIFY_LATER
);
2715 bond_for_each_slave_rcu(bond
, slave
, iter
) {
2716 if (!found
&& !before
&& bond_slave_is_up(slave
))
2719 if (found
&& !new_slave
&& bond_slave_is_up(slave
))
2721 /* if the link state is up at this point, we
2722 * mark it down - this can happen if we have
2723 * simultaneous link failures and
2724 * reselect_active_interface doesn't make this
2725 * one the current slave so it is still marked
2726 * up when it is actually down
2728 if (!bond_slave_is_up(slave
) && slave
->link
== BOND_LINK_UP
) {
2729 slave
->link
= BOND_LINK_DOWN
;
2730 if (slave
->link_failure_count
< UINT_MAX
)
2731 slave
->link_failure_count
++;
2733 bond_set_slave_inactive_flags(slave
,
2734 BOND_SLAVE_NOTIFY_LATER
);
2736 netdev_info(bond
->dev
, "backup interface %s is now down\n",
2739 if (slave
== curr_arp_slave
)
2743 if (!new_slave
&& before
)
2749 new_slave
->link
= BOND_LINK_BACK
;
2750 bond_set_slave_active_flags(new_slave
, BOND_SLAVE_NOTIFY_LATER
);
2751 bond_arp_send_all(bond
, new_slave
);
2752 new_slave
->last_link_up
= jiffies
;
2753 rcu_assign_pointer(bond
->current_arp_slave
, new_slave
);
2756 bond_for_each_slave_rcu(bond
, slave
, iter
) {
2757 if (slave
->should_notify
) {
2758 should_notify_rtnl
= BOND_SLAVE_NOTIFY_NOW
;
2762 return should_notify_rtnl
;
2765 static void bond_activebackup_arp_mon(struct work_struct
*work
)
2767 struct bonding
*bond
= container_of(work
, struct bonding
,
2769 bool should_notify_peers
= false;
2770 bool should_notify_rtnl
= false;
2773 delta_in_ticks
= msecs_to_jiffies(bond
->params
.arp_interval
);
2775 if (!bond_has_slaves(bond
))
2780 should_notify_peers
= bond_should_notify_peers(bond
);
2782 if (bond_ab_arp_inspect(bond
)) {
2785 /* Race avoidance with bond_close flush of workqueue */
2786 if (!rtnl_trylock()) {
2788 should_notify_peers
= false;
2792 bond_ab_arp_commit(bond
);
2798 should_notify_rtnl
= bond_ab_arp_probe(bond
);
2802 if (bond
->params
.arp_interval
)
2803 queue_delayed_work(bond
->wq
, &bond
->arp_work
, delta_in_ticks
);
2805 if (should_notify_peers
|| should_notify_rtnl
) {
2806 if (!rtnl_trylock())
2809 if (should_notify_peers
)
2810 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS
,
2812 if (should_notify_rtnl
)
2813 bond_slave_state_notify(bond
);
2819 /*-------------------------- netdev event handling --------------------------*/
2822 * Change device name
2824 static int bond_event_changename(struct bonding
*bond
)
2826 bond_remove_proc_entry(bond
);
2827 bond_create_proc_entry(bond
);
2829 bond_debug_reregister(bond
);
2834 static int bond_master_netdev_event(unsigned long event
,
2835 struct net_device
*bond_dev
)
2837 struct bonding
*event_bond
= netdev_priv(bond_dev
);
2840 case NETDEV_CHANGENAME
:
2841 return bond_event_changename(event_bond
);
2842 case NETDEV_UNREGISTER
:
2843 bond_remove_proc_entry(event_bond
);
2845 case NETDEV_REGISTER
:
2846 bond_create_proc_entry(event_bond
);
2848 case NETDEV_NOTIFY_PEERS
:
2849 if (event_bond
->send_peer_notif
)
2850 event_bond
->send_peer_notif
--;
2859 static int bond_slave_netdev_event(unsigned long event
,
2860 struct net_device
*slave_dev
)
2862 struct slave
*slave
= bond_slave_get_rtnl(slave_dev
);
2863 struct bonding
*bond
;
2864 struct net_device
*bond_dev
;
2868 /* A netdev event can be generated while enslaving a device
2869 * before netdev_rx_handler_register is called in which case
2870 * slave will be NULL
2874 bond_dev
= slave
->bond
->dev
;
2878 case NETDEV_UNREGISTER
:
2879 if (bond_dev
->type
!= ARPHRD_ETHER
)
2880 bond_release_and_destroy(bond_dev
, slave_dev
);
2882 bond_release(bond_dev
, slave_dev
);
2886 old_speed
= slave
->speed
;
2887 old_duplex
= slave
->duplex
;
2889 bond_update_speed_duplex(slave
);
2891 if (BOND_MODE(bond
) == BOND_MODE_8023AD
) {
2892 if (old_speed
!= slave
->speed
)
2893 bond_3ad_adapter_speed_changed(slave
);
2894 if (old_duplex
!= slave
->duplex
)
2895 bond_3ad_adapter_duplex_changed(slave
);
2900 * ... Or is it this?
2903 case NETDEV_CHANGEMTU
:
2905 * TODO: Should slaves be allowed to
2906 * independently alter their MTU? For
2907 * an active-backup bond, slaves need
2908 * not be the same type of device, so
2909 * MTUs may vary. For other modes,
2910 * slaves arguably should have the
2911 * same MTUs. To do this, we'd need to
2912 * take over the slave's change_mtu
2913 * function for the duration of their
2917 case NETDEV_CHANGENAME
:
2918 /* we don't care if we don't have primary set */
2919 if (!bond_uses_primary(bond
) ||
2920 !bond
->params
.primary
[0])
2923 if (slave
== bond
->primary_slave
) {
2924 /* slave's name changed - he's no longer primary */
2925 bond
->primary_slave
= NULL
;
2926 } else if (!strcmp(slave_dev
->name
, bond
->params
.primary
)) {
2927 /* we have a new primary slave */
2928 bond
->primary_slave
= slave
;
2929 } else { /* we didn't change primary - exit */
2933 netdev_info(bond
->dev
, "Primary slave changed to %s, reselecting active slave\n",
2934 bond
->primary_slave
? slave_dev
->name
: "none");
2937 write_lock_bh(&bond
->curr_slave_lock
);
2938 bond_select_active_slave(bond
);
2939 write_unlock_bh(&bond
->curr_slave_lock
);
2940 unblock_netpoll_tx();
2942 case NETDEV_FEAT_CHANGE
:
2943 bond_compute_features(bond
);
2945 case NETDEV_RESEND_IGMP
:
2946 /* Propagate to master device */
2947 call_netdevice_notifiers(event
, slave
->bond
->dev
);
2957 * bond_netdev_event: handle netdev notifier chain events.
2959 * This function receives events for the netdev chain. The caller (an
2960 * ioctl handler calling blocking_notifier_call_chain) holds the necessary
2961 * locks for us to safely manipulate the slave devices (RTNL lock,
2964 static int bond_netdev_event(struct notifier_block
*this,
2965 unsigned long event
, void *ptr
)
2967 struct net_device
*event_dev
= netdev_notifier_info_to_dev(ptr
);
2969 netdev_dbg(event_dev
, "event: %lx\n", event
);
2971 if (!(event_dev
->priv_flags
& IFF_BONDING
))
2974 if (event_dev
->flags
& IFF_MASTER
) {
2975 netdev_dbg(event_dev
, "IFF_MASTER\n");
2976 return bond_master_netdev_event(event
, event_dev
);
2979 if (event_dev
->flags
& IFF_SLAVE
) {
2980 netdev_dbg(event_dev
, "IFF_SLAVE\n");
2981 return bond_slave_netdev_event(event
, event_dev
);
2987 static struct notifier_block bond_netdev_notifier
= {
2988 .notifier_call
= bond_netdev_event
,
2991 /*---------------------------- Hashing Policies -----------------------------*/
2993 /* L2 hash helper */
2994 static inline u32
bond_eth_hash(struct sk_buff
*skb
)
2996 struct ethhdr
*ep
, hdr_tmp
;
2998 ep
= skb_header_pointer(skb
, 0, sizeof(hdr_tmp
), &hdr_tmp
);
3000 return ep
->h_dest
[5] ^ ep
->h_source
[5] ^ ep
->h_proto
;
3004 /* Extract the appropriate headers based on bond's xmit policy */
3005 static bool bond_flow_dissect(struct bonding
*bond
, struct sk_buff
*skb
,
3006 struct flow_keys
*fk
)
3008 const struct ipv6hdr
*iph6
;
3009 const struct iphdr
*iph
;
3010 int noff
, proto
= -1;
3012 if (bond
->params
.xmit_policy
> BOND_XMIT_POLICY_LAYER23
)
3013 return skb_flow_dissect(skb
, fk
);
3016 noff
= skb_network_offset(skb
);
3017 if (skb
->protocol
== htons(ETH_P_IP
)) {
3018 if (unlikely(!pskb_may_pull(skb
, noff
+ sizeof(*iph
))))
3021 fk
->src
= iph
->saddr
;
3022 fk
->dst
= iph
->daddr
;
3023 noff
+= iph
->ihl
<< 2;
3024 if (!ip_is_fragment(iph
))
3025 proto
= iph
->protocol
;
3026 } else if (skb
->protocol
== htons(ETH_P_IPV6
)) {
3027 if (unlikely(!pskb_may_pull(skb
, noff
+ sizeof(*iph6
))))
3029 iph6
= ipv6_hdr(skb
);
3030 fk
->src
= (__force __be32
)ipv6_addr_hash(&iph6
->saddr
);
3031 fk
->dst
= (__force __be32
)ipv6_addr_hash(&iph6
->daddr
);
3032 noff
+= sizeof(*iph6
);
3033 proto
= iph6
->nexthdr
;
3037 if (bond
->params
.xmit_policy
== BOND_XMIT_POLICY_LAYER34
&& proto
>= 0)
3038 fk
->ports
= skb_flow_get_ports(skb
, noff
, proto
);
3044 * bond_xmit_hash - generate a hash value based on the xmit policy
3045 * @bond: bonding device
3046 * @skb: buffer to use for headers
3048 * This function will extract the necessary headers from the skb buffer and use
3049 * them to generate a hash based on the xmit_policy set in the bonding device
3051 u32
bond_xmit_hash(struct bonding
*bond
, struct sk_buff
*skb
)
3053 struct flow_keys flow
;
3056 if (bond
->params
.xmit_policy
== BOND_XMIT_POLICY_LAYER2
||
3057 !bond_flow_dissect(bond
, skb
, &flow
))
3058 return bond_eth_hash(skb
);
3060 if (bond
->params
.xmit_policy
== BOND_XMIT_POLICY_LAYER23
||
3061 bond
->params
.xmit_policy
== BOND_XMIT_POLICY_ENCAP23
)
3062 hash
= bond_eth_hash(skb
);
3064 hash
= (__force u32
)flow
.ports
;
3065 hash
^= (__force u32
)flow
.dst
^ (__force u32
)flow
.src
;
3066 hash
^= (hash
>> 16);
3067 hash
^= (hash
>> 8);
3072 /*-------------------------- Device entry points ----------------------------*/
3074 static void bond_work_init_all(struct bonding
*bond
)
3076 INIT_DELAYED_WORK(&bond
->mcast_work
,
3077 bond_resend_igmp_join_requests_delayed
);
3078 INIT_DELAYED_WORK(&bond
->alb_work
, bond_alb_monitor
);
3079 INIT_DELAYED_WORK(&bond
->mii_work
, bond_mii_monitor
);
3080 if (BOND_MODE(bond
) == BOND_MODE_ACTIVEBACKUP
)
3081 INIT_DELAYED_WORK(&bond
->arp_work
, bond_activebackup_arp_mon
);
3083 INIT_DELAYED_WORK(&bond
->arp_work
, bond_loadbalance_arp_mon
);
3084 INIT_DELAYED_WORK(&bond
->ad_work
, bond_3ad_state_machine_handler
);
3087 static void bond_work_cancel_all(struct bonding
*bond
)
3089 cancel_delayed_work_sync(&bond
->mii_work
);
3090 cancel_delayed_work_sync(&bond
->arp_work
);
3091 cancel_delayed_work_sync(&bond
->alb_work
);
3092 cancel_delayed_work_sync(&bond
->ad_work
);
3093 cancel_delayed_work_sync(&bond
->mcast_work
);
3096 static int bond_open(struct net_device
*bond_dev
)
3098 struct bonding
*bond
= netdev_priv(bond_dev
);
3099 struct list_head
*iter
;
3100 struct slave
*slave
;
3102 /* reset slave->backup and slave->inactive */
3103 read_lock(&bond
->lock
);
3104 if (bond_has_slaves(bond
)) {
3105 read_lock(&bond
->curr_slave_lock
);
3106 bond_for_each_slave(bond
, slave
, iter
) {
3107 if (bond_uses_primary(bond
) &&
3108 slave
!= rcu_access_pointer(bond
->curr_active_slave
)) {
3109 bond_set_slave_inactive_flags(slave
,
3110 BOND_SLAVE_NOTIFY_NOW
);
3112 bond_set_slave_active_flags(slave
,
3113 BOND_SLAVE_NOTIFY_NOW
);
3116 read_unlock(&bond
->curr_slave_lock
);
3118 read_unlock(&bond
->lock
);
3120 bond_work_init_all(bond
);
3122 if (bond_is_lb(bond
)) {
3123 /* bond_alb_initialize must be called before the timer
3126 if (bond_alb_initialize(bond
, (BOND_MODE(bond
) == BOND_MODE_ALB
)))
3128 if (bond
->params
.tlb_dynamic_lb
)
3129 queue_delayed_work(bond
->wq
, &bond
->alb_work
, 0);
3132 if (bond
->params
.miimon
) /* link check interval, in milliseconds. */
3133 queue_delayed_work(bond
->wq
, &bond
->mii_work
, 0);
3135 if (bond
->params
.arp_interval
) { /* arp interval, in milliseconds. */
3136 queue_delayed_work(bond
->wq
, &bond
->arp_work
, 0);
3137 bond
->recv_probe
= bond_arp_rcv
;
3140 if (BOND_MODE(bond
) == BOND_MODE_8023AD
) {
3141 queue_delayed_work(bond
->wq
, &bond
->ad_work
, 0);
3142 /* register to receive LACPDUs */
3143 bond
->recv_probe
= bond_3ad_lacpdu_recv
;
3144 bond_3ad_initiate_agg_selection(bond
, 1);
3150 static int bond_close(struct net_device
*bond_dev
)
3152 struct bonding
*bond
= netdev_priv(bond_dev
);
3154 bond_work_cancel_all(bond
);
3155 bond
->send_peer_notif
= 0;
3156 if (bond_is_lb(bond
))
3157 bond_alb_deinitialize(bond
);
3158 bond
->recv_probe
= NULL
;
3163 static struct rtnl_link_stats64
*bond_get_stats(struct net_device
*bond_dev
,
3164 struct rtnl_link_stats64
*stats
)
3166 struct bonding
*bond
= netdev_priv(bond_dev
);
3167 struct rtnl_link_stats64 temp
;
3168 struct list_head
*iter
;
3169 struct slave
*slave
;
3171 memset(stats
, 0, sizeof(*stats
));
3173 read_lock_bh(&bond
->lock
);
3174 bond_for_each_slave(bond
, slave
, iter
) {
3175 const struct rtnl_link_stats64
*sstats
=
3176 dev_get_stats(slave
->dev
, &temp
);
3178 stats
->rx_packets
+= sstats
->rx_packets
;
3179 stats
->rx_bytes
+= sstats
->rx_bytes
;
3180 stats
->rx_errors
+= sstats
->rx_errors
;
3181 stats
->rx_dropped
+= sstats
->rx_dropped
;
3183 stats
->tx_packets
+= sstats
->tx_packets
;
3184 stats
->tx_bytes
+= sstats
->tx_bytes
;
3185 stats
->tx_errors
+= sstats
->tx_errors
;
3186 stats
->tx_dropped
+= sstats
->tx_dropped
;
3188 stats
->multicast
+= sstats
->multicast
;
3189 stats
->collisions
+= sstats
->collisions
;
3191 stats
->rx_length_errors
+= sstats
->rx_length_errors
;
3192 stats
->rx_over_errors
+= sstats
->rx_over_errors
;
3193 stats
->rx_crc_errors
+= sstats
->rx_crc_errors
;
3194 stats
->rx_frame_errors
+= sstats
->rx_frame_errors
;
3195 stats
->rx_fifo_errors
+= sstats
->rx_fifo_errors
;
3196 stats
->rx_missed_errors
+= sstats
->rx_missed_errors
;
3198 stats
->tx_aborted_errors
+= sstats
->tx_aborted_errors
;
3199 stats
->tx_carrier_errors
+= sstats
->tx_carrier_errors
;
3200 stats
->tx_fifo_errors
+= sstats
->tx_fifo_errors
;
3201 stats
->tx_heartbeat_errors
+= sstats
->tx_heartbeat_errors
;
3202 stats
->tx_window_errors
+= sstats
->tx_window_errors
;
3204 read_unlock_bh(&bond
->lock
);
3209 static int bond_do_ioctl(struct net_device
*bond_dev
, struct ifreq
*ifr
, int cmd
)
3211 struct bonding
*bond
= netdev_priv(bond_dev
);
3212 struct net_device
*slave_dev
= NULL
;
3213 struct ifbond k_binfo
;
3214 struct ifbond __user
*u_binfo
= NULL
;
3215 struct ifslave k_sinfo
;
3216 struct ifslave __user
*u_sinfo
= NULL
;
3217 struct mii_ioctl_data
*mii
= NULL
;
3218 struct bond_opt_value newval
;
3222 netdev_dbg(bond_dev
, "bond_ioctl: cmd=%d\n", cmd
);
3234 * We do this again just in case we were called by SIOCGMIIREG
3235 * instead of SIOCGMIIPHY.
3242 if (mii
->reg_num
== 1) {
3244 read_lock(&bond
->lock
);
3245 read_lock(&bond
->curr_slave_lock
);
3246 if (netif_carrier_ok(bond
->dev
))
3247 mii
->val_out
= BMSR_LSTATUS
;
3249 read_unlock(&bond
->curr_slave_lock
);
3250 read_unlock(&bond
->lock
);
3254 case BOND_INFO_QUERY_OLD
:
3255 case SIOCBONDINFOQUERY
:
3256 u_binfo
= (struct ifbond __user
*)ifr
->ifr_data
;
3258 if (copy_from_user(&k_binfo
, u_binfo
, sizeof(ifbond
)))
3261 res
= bond_info_query(bond_dev
, &k_binfo
);
3263 copy_to_user(u_binfo
, &k_binfo
, sizeof(ifbond
)))
3267 case BOND_SLAVE_INFO_QUERY_OLD
:
3268 case SIOCBONDSLAVEINFOQUERY
:
3269 u_sinfo
= (struct ifslave __user
*)ifr
->ifr_data
;
3271 if (copy_from_user(&k_sinfo
, u_sinfo
, sizeof(ifslave
)))
3274 res
= bond_slave_info_query(bond_dev
, &k_sinfo
);
3276 copy_to_user(u_sinfo
, &k_sinfo
, sizeof(ifslave
)))
3285 net
= dev_net(bond_dev
);
3287 if (!ns_capable(net
->user_ns
, CAP_NET_ADMIN
))
3290 slave_dev
= __dev_get_by_name(net
, ifr
->ifr_slave
);
3292 netdev_dbg(bond_dev
, "slave_dev=%p:\n", slave_dev
);
3297 netdev_dbg(bond_dev
, "slave_dev->name=%s:\n", slave_dev
->name
);
3299 case BOND_ENSLAVE_OLD
:
3300 case SIOCBONDENSLAVE
:
3301 res
= bond_enslave(bond_dev
, slave_dev
);
3303 case BOND_RELEASE_OLD
:
3304 case SIOCBONDRELEASE
:
3305 res
= bond_release(bond_dev
, slave_dev
);
3307 case BOND_SETHWADDR_OLD
:
3308 case SIOCBONDSETHWADDR
:
3309 bond_set_dev_addr(bond_dev
, slave_dev
);
3312 case BOND_CHANGE_ACTIVE_OLD
:
3313 case SIOCBONDCHANGEACTIVE
:
3314 bond_opt_initstr(&newval
, slave_dev
->name
);
3315 res
= __bond_opt_set(bond
, BOND_OPT_ACTIVE_SLAVE
, &newval
);
3324 static void bond_change_rx_flags(struct net_device
*bond_dev
, int change
)
3326 struct bonding
*bond
= netdev_priv(bond_dev
);
3328 if (change
& IFF_PROMISC
)
3329 bond_set_promiscuity(bond
,
3330 bond_dev
->flags
& IFF_PROMISC
? 1 : -1);
3332 if (change
& IFF_ALLMULTI
)
3333 bond_set_allmulti(bond
,
3334 bond_dev
->flags
& IFF_ALLMULTI
? 1 : -1);
3337 static void bond_set_rx_mode(struct net_device
*bond_dev
)
3339 struct bonding
*bond
= netdev_priv(bond_dev
);
3340 struct list_head
*iter
;
3341 struct slave
*slave
;
3345 if (bond_uses_primary(bond
)) {
3346 slave
= rcu_dereference(bond
->curr_active_slave
);
3348 dev_uc_sync(slave
->dev
, bond_dev
);
3349 dev_mc_sync(slave
->dev
, bond_dev
);
3352 bond_for_each_slave_rcu(bond
, slave
, iter
) {
3353 dev_uc_sync_multiple(slave
->dev
, bond_dev
);
3354 dev_mc_sync_multiple(slave
->dev
, bond_dev
);
3360 static int bond_neigh_init(struct neighbour
*n
)
3362 struct bonding
*bond
= netdev_priv(n
->dev
);
3363 const struct net_device_ops
*slave_ops
;
3364 struct neigh_parms parms
;
3365 struct slave
*slave
;
3368 slave
= bond_first_slave(bond
);
3371 slave_ops
= slave
->dev
->netdev_ops
;
3372 if (!slave_ops
->ndo_neigh_setup
)
3375 parms
.neigh_setup
= NULL
;
3376 parms
.neigh_cleanup
= NULL
;
3377 ret
= slave_ops
->ndo_neigh_setup(slave
->dev
, &parms
);
3382 * Assign slave's neigh_cleanup to neighbour in case cleanup is called
3383 * after the last slave has been detached. Assumes that all slaves
3384 * utilize the same neigh_cleanup (true at this writing as only user
3387 n
->parms
->neigh_cleanup
= parms
.neigh_cleanup
;
3389 if (!parms
.neigh_setup
)
3392 return parms
.neigh_setup(n
);
3396 * The bonding ndo_neigh_setup is called at init time beofre any
3397 * slave exists. So we must declare proxy setup function which will
3398 * be used at run time to resolve the actual slave neigh param setup.
3400 * It's also called by master devices (such as vlans) to setup their
3401 * underlying devices. In that case - do nothing, we're already set up from
3404 static int bond_neigh_setup(struct net_device
*dev
,
3405 struct neigh_parms
*parms
)
3407 /* modify only our neigh_parms */
3408 if (parms
->dev
== dev
)
3409 parms
->neigh_setup
= bond_neigh_init
;
3415 * Change the MTU of all of a master's slaves to match the master
3417 static int bond_change_mtu(struct net_device
*bond_dev
, int new_mtu
)
3419 struct bonding
*bond
= netdev_priv(bond_dev
);
3420 struct slave
*slave
, *rollback_slave
;
3421 struct list_head
*iter
;
3424 netdev_dbg(bond_dev
, "bond=%p, new_mtu=%d\n", bond
, new_mtu
);
3426 /* Can't hold bond->lock with bh disabled here since
3427 * some base drivers panic. On the other hand we can't
3428 * hold bond->lock without bh disabled because we'll
3429 * deadlock. The only solution is to rely on the fact
3430 * that we're under rtnl_lock here, and the slaves
3431 * list won't change. This doesn't solve the problem
3432 * of setting the slave's MTU while it is
3433 * transmitting, but the assumption is that the base
3434 * driver can handle that.
3436 * TODO: figure out a way to safely iterate the slaves
3437 * list, but without holding a lock around the actual
3438 * call to the base driver.
3441 bond_for_each_slave(bond
, slave
, iter
) {
3442 netdev_dbg(bond_dev
, "s %p c_m %p\n",
3443 slave
, slave
->dev
->netdev_ops
->ndo_change_mtu
);
3445 res
= dev_set_mtu(slave
->dev
, new_mtu
);
3448 /* If we failed to set the slave's mtu to the new value
3449 * we must abort the operation even in ACTIVE_BACKUP
3450 * mode, because if we allow the backup slaves to have
3451 * different mtu values than the active slave we'll
3452 * need to change their mtu when doing a failover. That
3453 * means changing their mtu from timer context, which
3454 * is probably not a good idea.
3456 netdev_dbg(bond_dev
, "err %d %s\n", res
,
3462 bond_dev
->mtu
= new_mtu
;
3467 /* unwind from head to the slave that failed */
3468 bond_for_each_slave(bond
, rollback_slave
, iter
) {
3471 if (rollback_slave
== slave
)
3474 tmp_res
= dev_set_mtu(rollback_slave
->dev
, bond_dev
->mtu
);
3476 netdev_dbg(bond_dev
, "unwind err %d dev %s\n",
3477 tmp_res
, rollback_slave
->dev
->name
);
3487 * Note that many devices must be down to change the HW address, and
3488 * downing the master releases all slaves. We can make bonds full of
3489 * bonding devices to test this, however.
3491 static int bond_set_mac_address(struct net_device
*bond_dev
, void *addr
)
3493 struct bonding
*bond
= netdev_priv(bond_dev
);
3494 struct slave
*slave
, *rollback_slave
;
3495 struct sockaddr
*sa
= addr
, tmp_sa
;
3496 struct list_head
*iter
;
3499 if (BOND_MODE(bond
) == BOND_MODE_ALB
)
3500 return bond_alb_set_mac_address(bond_dev
, addr
);
3503 netdev_dbg(bond_dev
, "bond=%p\n", bond
);
3505 /* If fail_over_mac is enabled, do nothing and return success.
3506 * Returning an error causes ifenslave to fail.
3508 if (bond
->params
.fail_over_mac
&&
3509 BOND_MODE(bond
) == BOND_MODE_ACTIVEBACKUP
)
3512 if (!is_valid_ether_addr(sa
->sa_data
))
3513 return -EADDRNOTAVAIL
;
3515 /* Can't hold bond->lock with bh disabled here since
3516 * some base drivers panic. On the other hand we can't
3517 * hold bond->lock without bh disabled because we'll
3518 * deadlock. The only solution is to rely on the fact
3519 * that we're under rtnl_lock here, and the slaves
3520 * list won't change. This doesn't solve the problem
3521 * of setting the slave's hw address while it is
3522 * transmitting, but the assumption is that the base
3523 * driver can handle that.
3525 * TODO: figure out a way to safely iterate the slaves
3526 * list, but without holding a lock around the actual
3527 * call to the base driver.
3530 bond_for_each_slave(bond
, slave
, iter
) {
3531 netdev_dbg(bond_dev
, "slave %p %s\n", slave
, slave
->dev
->name
);
3532 res
= dev_set_mac_address(slave
->dev
, addr
);
3534 /* TODO: consider downing the slave
3536 * User should expect communications
3537 * breakage anyway until ARP finish
3540 netdev_dbg(bond_dev
, "err %d %s\n", res
, slave
->dev
->name
);
3546 memcpy(bond_dev
->dev_addr
, sa
->sa_data
, bond_dev
->addr_len
);
3550 memcpy(tmp_sa
.sa_data
, bond_dev
->dev_addr
, bond_dev
->addr_len
);
3551 tmp_sa
.sa_family
= bond_dev
->type
;
3553 /* unwind from head to the slave that failed */
3554 bond_for_each_slave(bond
, rollback_slave
, iter
) {
3557 if (rollback_slave
== slave
)
3560 tmp_res
= dev_set_mac_address(rollback_slave
->dev
, &tmp_sa
);
3562 netdev_dbg(bond_dev
, "unwind err %d dev %s\n",
3563 tmp_res
, rollback_slave
->dev
->name
);
3571 * bond_xmit_slave_id - transmit skb through slave with slave_id
3572 * @bond: bonding device that is transmitting
3573 * @skb: buffer to transmit
3574 * @slave_id: slave id up to slave_cnt-1 through which to transmit
3576 * This function tries to transmit through slave with slave_id but in case
3577 * it fails, it tries to find the first available slave for transmission.
3578 * The skb is consumed in all cases, thus the function is void.
3580 static void bond_xmit_slave_id(struct bonding
*bond
, struct sk_buff
*skb
, int slave_id
)
3582 struct list_head
*iter
;
3583 struct slave
*slave
;
3586 /* Here we start from the slave with slave_id */
3587 bond_for_each_slave_rcu(bond
, slave
, iter
) {
3589 if (bond_slave_can_tx(slave
)) {
3590 bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
3596 /* Here we start from the first slave up to slave_id */
3598 bond_for_each_slave_rcu(bond
, slave
, iter
) {
3601 if (bond_slave_can_tx(slave
)) {
3602 bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
3606 /* no slave that can tx has been found */
3607 dev_kfree_skb_any(skb
);
3611 * bond_rr_gen_slave_id - generate slave id based on packets_per_slave
3612 * @bond: bonding device to use
3614 * Based on the value of the bonding device's packets_per_slave parameter
3615 * this function generates a slave id, which is usually used as the next
3616 * slave to transmit through.
3618 static u32
bond_rr_gen_slave_id(struct bonding
*bond
)
3621 struct reciprocal_value reciprocal_packets_per_slave
;
3622 int packets_per_slave
= bond
->params
.packets_per_slave
;
3624 switch (packets_per_slave
) {
3626 slave_id
= prandom_u32();
3629 slave_id
= bond
->rr_tx_counter
;
3632 reciprocal_packets_per_slave
=
3633 bond
->params
.reciprocal_packets_per_slave
;
3634 slave_id
= reciprocal_divide(bond
->rr_tx_counter
,
3635 reciprocal_packets_per_slave
);
3638 bond
->rr_tx_counter
++;
3643 static int bond_xmit_roundrobin(struct sk_buff
*skb
, struct net_device
*bond_dev
)
3645 struct bonding
*bond
= netdev_priv(bond_dev
);
3646 struct iphdr
*iph
= ip_hdr(skb
);
3647 struct slave
*slave
;
3650 /* Start with the curr_active_slave that joined the bond as the
3651 * default for sending IGMP traffic. For failover purposes one
3652 * needs to maintain some consistency for the interface that will
3653 * send the join/membership reports. The curr_active_slave found
3654 * will send all of this type of traffic.
3656 if (iph
->protocol
== IPPROTO_IGMP
&& skb
->protocol
== htons(ETH_P_IP
)) {
3657 slave
= rcu_dereference(bond
->curr_active_slave
);
3658 if (slave
&& bond_slave_can_tx(slave
))
3659 bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
3661 bond_xmit_slave_id(bond
, skb
, 0);
3663 slave_id
= bond_rr_gen_slave_id(bond
);
3664 bond_xmit_slave_id(bond
, skb
, slave_id
% bond
->slave_cnt
);
3667 return NETDEV_TX_OK
;
3671 * in active-backup mode, we know that bond->curr_active_slave is always valid if
3672 * the bond has a usable interface.
3674 static int bond_xmit_activebackup(struct sk_buff
*skb
, struct net_device
*bond_dev
)
3676 struct bonding
*bond
= netdev_priv(bond_dev
);
3677 struct slave
*slave
;
3679 slave
= rcu_dereference(bond
->curr_active_slave
);
3681 bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
3683 dev_kfree_skb_any(skb
);
3685 return NETDEV_TX_OK
;
3688 /* In bond_xmit_xor() , we determine the output device by using a pre-
3689 * determined xmit_hash_policy(), If the selected device is not enabled,
3690 * find the next active slave.
3692 static int bond_xmit_xor(struct sk_buff
*skb
, struct net_device
*bond_dev
)
3694 struct bonding
*bond
= netdev_priv(bond_dev
);
3696 bond_xmit_slave_id(bond
, skb
, bond_xmit_hash(bond
, skb
) % bond
->slave_cnt
);
3698 return NETDEV_TX_OK
;
3701 /* in broadcast mode, we send everything to all usable interfaces. */
3702 static int bond_xmit_broadcast(struct sk_buff
*skb
, struct net_device
*bond_dev
)
3704 struct bonding
*bond
= netdev_priv(bond_dev
);
3705 struct slave
*slave
= NULL
;
3706 struct list_head
*iter
;
3708 bond_for_each_slave_rcu(bond
, slave
, iter
) {
3709 if (bond_is_last_slave(bond
, slave
))
3711 if (bond_slave_is_up(slave
) && slave
->link
== BOND_LINK_UP
) {
3712 struct sk_buff
*skb2
= skb_clone(skb
, GFP_ATOMIC
);
3715 net_err_ratelimited("%s: Error: %s: skb_clone() failed\n",
3716 bond_dev
->name
, __func__
);
3719 /* bond_dev_queue_xmit always returns 0 */
3720 bond_dev_queue_xmit(bond
, skb2
, slave
->dev
);
3723 if (slave
&& bond_slave_is_up(slave
) && slave
->link
== BOND_LINK_UP
)
3724 bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
3726 dev_kfree_skb_any(skb
);
3728 return NETDEV_TX_OK
;
3731 /*------------------------- Device initialization ---------------------------*/
3734 * Lookup the slave that corresponds to a qid
3736 static inline int bond_slave_override(struct bonding
*bond
,
3737 struct sk_buff
*skb
)
3739 struct slave
*slave
= NULL
;
3740 struct list_head
*iter
;
3742 if (!skb
->queue_mapping
)
3745 /* Find out if any slaves have the same mapping as this skb. */
3746 bond_for_each_slave_rcu(bond
, slave
, iter
) {
3747 if (slave
->queue_id
== skb
->queue_mapping
) {
3748 if (bond_slave_can_tx(slave
)) {
3749 bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
3752 /* If the slave isn't UP, use default transmit policy. */
3761 static u16
bond_select_queue(struct net_device
*dev
, struct sk_buff
*skb
,
3762 void *accel_priv
, select_queue_fallback_t fallback
)
3765 * This helper function exists to help dev_pick_tx get the correct
3766 * destination queue. Using a helper function skips a call to
3767 * skb_tx_hash and will put the skbs in the queue we expect on their
3768 * way down to the bonding driver.
3770 u16 txq
= skb_rx_queue_recorded(skb
) ? skb_get_rx_queue(skb
) : 0;
3773 * Save the original txq to restore before passing to the driver
3775 qdisc_skb_cb(skb
)->slave_dev_queue_mapping
= skb
->queue_mapping
;
3777 if (unlikely(txq
>= dev
->real_num_tx_queues
)) {
3779 txq
-= dev
->real_num_tx_queues
;
3780 } while (txq
>= dev
->real_num_tx_queues
);
3785 static netdev_tx_t
__bond_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
3787 struct bonding
*bond
= netdev_priv(dev
);
3789 if (bond_should_override_tx_queue(bond
) &&
3790 !bond_slave_override(bond
, skb
))
3791 return NETDEV_TX_OK
;
3793 switch (BOND_MODE(bond
)) {
3794 case BOND_MODE_ROUNDROBIN
:
3795 return bond_xmit_roundrobin(skb
, dev
);
3796 case BOND_MODE_ACTIVEBACKUP
:
3797 return bond_xmit_activebackup(skb
, dev
);
3799 return bond_xmit_xor(skb
, dev
);
3800 case BOND_MODE_BROADCAST
:
3801 return bond_xmit_broadcast(skb
, dev
);
3802 case BOND_MODE_8023AD
:
3803 return bond_3ad_xmit_xor(skb
, dev
);
3805 return bond_alb_xmit(skb
, dev
);
3807 return bond_tlb_xmit(skb
, dev
);
3809 /* Should never happen, mode already checked */
3810 netdev_err(dev
, "Unknown bonding mode %d\n", BOND_MODE(bond
));
3812 dev_kfree_skb_any(skb
);
3813 return NETDEV_TX_OK
;
3817 static netdev_tx_t
bond_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
3819 struct bonding
*bond
= netdev_priv(dev
);
3820 netdev_tx_t ret
= NETDEV_TX_OK
;
3823 * If we risk deadlock from transmitting this in the
3824 * netpoll path, tell netpoll to queue the frame for later tx
3826 if (unlikely(is_netpoll_tx_blocked(dev
)))
3827 return NETDEV_TX_BUSY
;
3830 if (bond_has_slaves(bond
))
3831 ret
= __bond_start_xmit(skb
, dev
);
3833 dev_kfree_skb_any(skb
);
3839 static int bond_ethtool_get_settings(struct net_device
*bond_dev
,
3840 struct ethtool_cmd
*ecmd
)
3842 struct bonding
*bond
= netdev_priv(bond_dev
);
3843 unsigned long speed
= 0;
3844 struct list_head
*iter
;
3845 struct slave
*slave
;
3847 ecmd
->duplex
= DUPLEX_UNKNOWN
;
3848 ecmd
->port
= PORT_OTHER
;
3850 /* Since bond_slave_can_tx returns false for all inactive or down slaves, we
3851 * do not need to check mode. Though link speed might not represent
3852 * the true receive or transmit bandwidth (not all modes are symmetric)
3853 * this is an accurate maximum.
3855 read_lock(&bond
->lock
);
3856 bond_for_each_slave(bond
, slave
, iter
) {
3857 if (bond_slave_can_tx(slave
)) {
3858 if (slave
->speed
!= SPEED_UNKNOWN
)
3859 speed
+= slave
->speed
;
3860 if (ecmd
->duplex
== DUPLEX_UNKNOWN
&&
3861 slave
->duplex
!= DUPLEX_UNKNOWN
)
3862 ecmd
->duplex
= slave
->duplex
;
3865 ethtool_cmd_speed_set(ecmd
, speed
? : SPEED_UNKNOWN
);
3866 read_unlock(&bond
->lock
);
3871 static void bond_ethtool_get_drvinfo(struct net_device
*bond_dev
,
3872 struct ethtool_drvinfo
*drvinfo
)
3874 strlcpy(drvinfo
->driver
, DRV_NAME
, sizeof(drvinfo
->driver
));
3875 strlcpy(drvinfo
->version
, DRV_VERSION
, sizeof(drvinfo
->version
));
3876 snprintf(drvinfo
->fw_version
, sizeof(drvinfo
->fw_version
), "%d",
3880 static const struct ethtool_ops bond_ethtool_ops
= {
3881 .get_drvinfo
= bond_ethtool_get_drvinfo
,
3882 .get_settings
= bond_ethtool_get_settings
,
3883 .get_link
= ethtool_op_get_link
,
3886 static const struct net_device_ops bond_netdev_ops
= {
3887 .ndo_init
= bond_init
,
3888 .ndo_uninit
= bond_uninit
,
3889 .ndo_open
= bond_open
,
3890 .ndo_stop
= bond_close
,
3891 .ndo_start_xmit
= bond_start_xmit
,
3892 .ndo_select_queue
= bond_select_queue
,
3893 .ndo_get_stats64
= bond_get_stats
,
3894 .ndo_do_ioctl
= bond_do_ioctl
,
3895 .ndo_change_rx_flags
= bond_change_rx_flags
,
3896 .ndo_set_rx_mode
= bond_set_rx_mode
,
3897 .ndo_change_mtu
= bond_change_mtu
,
3898 .ndo_set_mac_address
= bond_set_mac_address
,
3899 .ndo_neigh_setup
= bond_neigh_setup
,
3900 .ndo_vlan_rx_add_vid
= bond_vlan_rx_add_vid
,
3901 .ndo_vlan_rx_kill_vid
= bond_vlan_rx_kill_vid
,
3902 #ifdef CONFIG_NET_POLL_CONTROLLER
3903 .ndo_netpoll_setup
= bond_netpoll_setup
,
3904 .ndo_netpoll_cleanup
= bond_netpoll_cleanup
,
3905 .ndo_poll_controller
= bond_poll_controller
,
3907 .ndo_add_slave
= bond_enslave
,
3908 .ndo_del_slave
= bond_release
,
3909 .ndo_fix_features
= bond_fix_features
,
3912 static const struct device_type bond_type
= {
3916 static void bond_destructor(struct net_device
*bond_dev
)
3918 struct bonding
*bond
= netdev_priv(bond_dev
);
3920 destroy_workqueue(bond
->wq
);
3921 free_netdev(bond_dev
);
3924 void bond_setup(struct net_device
*bond_dev
)
3926 struct bonding
*bond
= netdev_priv(bond_dev
);
3928 /* initialize rwlocks */
3929 rwlock_init(&bond
->lock
);
3930 rwlock_init(&bond
->curr_slave_lock
);
3931 bond
->params
= bonding_defaults
;
3933 /* Initialize pointers */
3934 bond
->dev
= bond_dev
;
3936 /* Initialize the device entry points */
3937 ether_setup(bond_dev
);
3938 bond_dev
->netdev_ops
= &bond_netdev_ops
;
3939 bond_dev
->ethtool_ops
= &bond_ethtool_ops
;
3941 bond_dev
->destructor
= bond_destructor
;
3943 SET_NETDEV_DEVTYPE(bond_dev
, &bond_type
);
3945 /* Initialize the device options */
3946 bond_dev
->tx_queue_len
= 0;
3947 bond_dev
->flags
|= IFF_MASTER
|IFF_MULTICAST
;
3948 bond_dev
->priv_flags
|= IFF_BONDING
| IFF_UNICAST_FLT
;
3949 bond_dev
->priv_flags
&= ~(IFF_XMIT_DST_RELEASE
| IFF_TX_SKB_SHARING
);
3951 /* don't acquire bond device's netif_tx_lock when
3953 bond_dev
->features
|= NETIF_F_LLTX
;
3955 /* By default, we declare the bond to be fully
3956 * VLAN hardware accelerated capable. Special
3957 * care is taken in the various xmit functions
3958 * when there are slaves that are not hw accel
3962 /* Don't allow bond devices to change network namespaces. */
3963 bond_dev
->features
|= NETIF_F_NETNS_LOCAL
;
3965 bond_dev
->hw_features
= BOND_VLAN_FEATURES
|
3966 NETIF_F_HW_VLAN_CTAG_TX
|
3967 NETIF_F_HW_VLAN_CTAG_RX
|
3968 NETIF_F_HW_VLAN_CTAG_FILTER
;
3970 bond_dev
->hw_features
&= ~(NETIF_F_ALL_CSUM
& ~NETIF_F_HW_CSUM
);
3971 bond_dev
->hw_features
|= NETIF_F_GSO_UDP_TUNNEL
;
3972 bond_dev
->features
|= bond_dev
->hw_features
;
3976 * Destroy a bonding device.
3977 * Must be under rtnl_lock when this function is called.
3979 static void bond_uninit(struct net_device
*bond_dev
)
3981 struct bonding
*bond
= netdev_priv(bond_dev
);
3982 struct list_head
*iter
;
3983 struct slave
*slave
;
3985 bond_netpoll_cleanup(bond_dev
);
3987 /* Release the bonded slaves */
3988 bond_for_each_slave(bond
, slave
, iter
)
3989 __bond_release_one(bond_dev
, slave
->dev
, true);
3990 netdev_info(bond_dev
, "Released all slaves\n");
3992 list_del(&bond
->bond_list
);
3994 bond_debug_unregister(bond
);
3997 /*------------------------- Module initialization ---------------------------*/
3999 static int bond_check_params(struct bond_params
*params
)
4001 int arp_validate_value
, fail_over_mac_value
, primary_reselect_value
, i
;
4002 struct bond_opt_value newval
;
4003 const struct bond_opt_value
*valptr
;
4004 int arp_all_targets_value
;
4007 * Convert string parameters.
4010 bond_opt_initstr(&newval
, mode
);
4011 valptr
= bond_opt_parse(bond_opt_get(BOND_OPT_MODE
), &newval
);
4013 pr_err("Error: Invalid bonding mode \"%s\"\n", mode
);
4016 bond_mode
= valptr
->value
;
4019 if (xmit_hash_policy
) {
4020 if ((bond_mode
!= BOND_MODE_XOR
) &&
4021 (bond_mode
!= BOND_MODE_8023AD
) &&
4022 (bond_mode
!= BOND_MODE_TLB
)) {
4023 pr_info("xmit_hash_policy param is irrelevant in mode %s\n",
4024 bond_mode_name(bond_mode
));
4026 bond_opt_initstr(&newval
, xmit_hash_policy
);
4027 valptr
= bond_opt_parse(bond_opt_get(BOND_OPT_XMIT_HASH
),
4030 pr_err("Error: Invalid xmit_hash_policy \"%s\"\n",
4034 xmit_hashtype
= valptr
->value
;
4039 if (bond_mode
!= BOND_MODE_8023AD
) {
4040 pr_info("lacp_rate param is irrelevant in mode %s\n",
4041 bond_mode_name(bond_mode
));
4043 bond_opt_initstr(&newval
, lacp_rate
);
4044 valptr
= bond_opt_parse(bond_opt_get(BOND_OPT_LACP_RATE
),
4047 pr_err("Error: Invalid lacp rate \"%s\"\n",
4051 lacp_fast
= valptr
->value
;
4056 bond_opt_initstr(&newval
, ad_select
);
4057 valptr
= bond_opt_parse(bond_opt_get(BOND_OPT_AD_SELECT
),
4060 pr_err("Error: Invalid ad_select \"%s\"\n", ad_select
);
4063 params
->ad_select
= valptr
->value
;
4064 if (bond_mode
!= BOND_MODE_8023AD
)
4065 pr_warn("ad_select param only affects 802.3ad mode\n");
4067 params
->ad_select
= BOND_AD_STABLE
;
4070 if (max_bonds
< 0) {
4071 pr_warn("Warning: max_bonds (%d) not in range %d-%d, so it was reset to BOND_DEFAULT_MAX_BONDS (%d)\n",
4072 max_bonds
, 0, INT_MAX
, BOND_DEFAULT_MAX_BONDS
);
4073 max_bonds
= BOND_DEFAULT_MAX_BONDS
;
4077 pr_warn("Warning: miimon module parameter (%d), not in range 0-%d, so it was reset to 0\n",
4083 pr_warn("Warning: updelay module parameter (%d), not in range 0-%d, so it was reset to 0\n",
4088 if (downdelay
< 0) {
4089 pr_warn("Warning: downdelay module parameter (%d), not in range 0-%d, so it was reset to 0\n",
4090 downdelay
, INT_MAX
);
4094 if ((use_carrier
!= 0) && (use_carrier
!= 1)) {
4095 pr_warn("Warning: use_carrier module parameter (%d), not of valid value (0/1), so it was set to 1\n",
4100 if (num_peer_notif
< 0 || num_peer_notif
> 255) {
4101 pr_warn("Warning: num_grat_arp/num_unsol_na (%d) not in range 0-255 so it was reset to 1\n",
4106 /* reset values for 802.3ad/TLB/ALB */
4107 if (!bond_mode_uses_arp(bond_mode
)) {
4109 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");
4110 pr_warn("Forcing miimon to 100msec\n");
4111 miimon
= BOND_DEFAULT_MIIMON
;
4115 if (tx_queues
< 1 || tx_queues
> 255) {
4116 pr_warn("Warning: tx_queues (%d) should be between 1 and 255, resetting to %d\n",
4117 tx_queues
, BOND_DEFAULT_TX_QUEUES
);
4118 tx_queues
= BOND_DEFAULT_TX_QUEUES
;
4121 if ((all_slaves_active
!= 0) && (all_slaves_active
!= 1)) {
4122 pr_warn("Warning: all_slaves_active module parameter (%d), not of valid value (0/1), so it was set to 0\n",
4124 all_slaves_active
= 0;
4127 if (resend_igmp
< 0 || resend_igmp
> 255) {
4128 pr_warn("Warning: resend_igmp (%d) should be between 0 and 255, resetting to %d\n",
4129 resend_igmp
, BOND_DEFAULT_RESEND_IGMP
);
4130 resend_igmp
= BOND_DEFAULT_RESEND_IGMP
;
4133 bond_opt_initval(&newval
, packets_per_slave
);
4134 if (!bond_opt_parse(bond_opt_get(BOND_OPT_PACKETS_PER_SLAVE
), &newval
)) {
4135 pr_warn("Warning: packets_per_slave (%d) should be between 0 and %u resetting to 1\n",
4136 packets_per_slave
, USHRT_MAX
);
4137 packets_per_slave
= 1;
4140 if (bond_mode
== BOND_MODE_ALB
) {
4141 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",
4146 if (updelay
|| downdelay
) {
4147 /* just warn the user the up/down delay will have
4148 * no effect since miimon is zero...
4150 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",
4151 updelay
, downdelay
);
4154 /* don't allow arp monitoring */
4156 pr_warn("Warning: miimon (%d) and arp_interval (%d) can't be used simultaneously, disabling ARP monitoring\n",
4157 miimon
, arp_interval
);
4161 if ((updelay
% miimon
) != 0) {
4162 pr_warn("Warning: updelay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
4163 updelay
, miimon
, (updelay
/ miimon
) * miimon
);
4168 if ((downdelay
% miimon
) != 0) {
4169 pr_warn("Warning: downdelay (%d) is not a multiple of miimon (%d), downdelay rounded to %d ms\n",
4171 (downdelay
/ miimon
) * miimon
);
4174 downdelay
/= miimon
;
4177 if (arp_interval
< 0) {
4178 pr_warn("Warning: arp_interval module parameter (%d), not in range 0-%d, so it was reset to 0\n",
4179 arp_interval
, INT_MAX
);
4183 for (arp_ip_count
= 0, i
= 0;
4184 (arp_ip_count
< BOND_MAX_ARP_TARGETS
) && arp_ip_target
[i
]; i
++) {
4185 /* not complete check, but should be good enough to
4188 if (!in4_pton(arp_ip_target
[i
], -1, (u8
*)&ip
, -1, NULL
) ||
4189 !bond_is_ip_target_ok(ip
)) {
4190 pr_warn("Warning: bad arp_ip_target module parameter (%s), ARP monitoring will not be performed\n",
4194 if (bond_get_targets_ip(arp_target
, ip
) == -1)
4195 arp_target
[arp_ip_count
++] = ip
;
4197 pr_warn("Warning: duplicate address %pI4 in arp_ip_target, skipping\n",
4202 if (arp_interval
&& !arp_ip_count
) {
4203 /* don't allow arping if no arp_ip_target given... */
4204 pr_warn("Warning: arp_interval module parameter (%d) specified without providing an arp_ip_target parameter, arp_interval was reset to 0\n",
4210 if (!arp_interval
) {
4211 pr_err("arp_validate requires arp_interval\n");
4215 bond_opt_initstr(&newval
, arp_validate
);
4216 valptr
= bond_opt_parse(bond_opt_get(BOND_OPT_ARP_VALIDATE
),
4219 pr_err("Error: invalid arp_validate \"%s\"\n",
4223 arp_validate_value
= valptr
->value
;
4225 arp_validate_value
= 0;
4228 arp_all_targets_value
= 0;
4229 if (arp_all_targets
) {
4230 bond_opt_initstr(&newval
, arp_all_targets
);
4231 valptr
= bond_opt_parse(bond_opt_get(BOND_OPT_ARP_ALL_TARGETS
),
4234 pr_err("Error: invalid arp_all_targets_value \"%s\"\n",
4236 arp_all_targets_value
= 0;
4238 arp_all_targets_value
= valptr
->value
;
4243 pr_info("MII link monitoring set to %d ms\n", miimon
);
4244 } else if (arp_interval
) {
4245 valptr
= bond_opt_get_val(BOND_OPT_ARP_VALIDATE
,
4246 arp_validate_value
);
4247 pr_info("ARP monitoring set to %d ms, validate %s, with %d target(s):",
4248 arp_interval
, valptr
->string
, arp_ip_count
);
4250 for (i
= 0; i
< arp_ip_count
; i
++)
4251 pr_cont(" %s", arp_ip_target
[i
]);
4255 } else if (max_bonds
) {
4256 /* miimon and arp_interval not set, we need one so things
4257 * work as expected, see bonding.txt for details
4259 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");
4262 if (primary
&& !bond_mode_uses_primary(bond_mode
)) {
4263 /* currently, using a primary only makes sense
4264 * in active backup, TLB or ALB modes
4266 pr_warn("Warning: %s primary device specified but has no effect in %s mode\n",
4267 primary
, bond_mode_name(bond_mode
));
4271 if (primary
&& primary_reselect
) {
4272 bond_opt_initstr(&newval
, primary_reselect
);
4273 valptr
= bond_opt_parse(bond_opt_get(BOND_OPT_PRIMARY_RESELECT
),
4276 pr_err("Error: Invalid primary_reselect \"%s\"\n",
4280 primary_reselect_value
= valptr
->value
;
4282 primary_reselect_value
= BOND_PRI_RESELECT_ALWAYS
;
4285 if (fail_over_mac
) {
4286 bond_opt_initstr(&newval
, fail_over_mac
);
4287 valptr
= bond_opt_parse(bond_opt_get(BOND_OPT_FAIL_OVER_MAC
),
4290 pr_err("Error: invalid fail_over_mac \"%s\"\n",
4294 fail_over_mac_value
= valptr
->value
;
4295 if (bond_mode
!= BOND_MODE_ACTIVEBACKUP
)
4296 pr_warn("Warning: fail_over_mac only affects active-backup mode\n");
4298 fail_over_mac_value
= BOND_FOM_NONE
;
4301 if (lp_interval
== 0) {
4302 pr_warn("Warning: ip_interval must be between 1 and %d, so it was reset to %d\n",
4303 INT_MAX
, BOND_ALB_DEFAULT_LP_INTERVAL
);
4304 lp_interval
= BOND_ALB_DEFAULT_LP_INTERVAL
;
4307 /* fill params struct with the proper values */
4308 params
->mode
= bond_mode
;
4309 params
->xmit_policy
= xmit_hashtype
;
4310 params
->miimon
= miimon
;
4311 params
->num_peer_notif
= num_peer_notif
;
4312 params
->arp_interval
= arp_interval
;
4313 params
->arp_validate
= arp_validate_value
;
4314 params
->arp_all_targets
= arp_all_targets_value
;
4315 params
->updelay
= updelay
;
4316 params
->downdelay
= downdelay
;
4317 params
->use_carrier
= use_carrier
;
4318 params
->lacp_fast
= lacp_fast
;
4319 params
->primary
[0] = 0;
4320 params
->primary_reselect
= primary_reselect_value
;
4321 params
->fail_over_mac
= fail_over_mac_value
;
4322 params
->tx_queues
= tx_queues
;
4323 params
->all_slaves_active
= all_slaves_active
;
4324 params
->resend_igmp
= resend_igmp
;
4325 params
->min_links
= min_links
;
4326 params
->lp_interval
= lp_interval
;
4327 params
->packets_per_slave
= packets_per_slave
;
4328 params
->tlb_dynamic_lb
= 1; /* Default value */
4329 if (packets_per_slave
> 0) {
4330 params
->reciprocal_packets_per_slave
=
4331 reciprocal_value(packets_per_slave
);
4333 /* reciprocal_packets_per_slave is unused if
4334 * packets_per_slave is 0 or 1, just initialize it
4336 params
->reciprocal_packets_per_slave
=
4337 (struct reciprocal_value
) { 0 };
4341 strncpy(params
->primary
, primary
, IFNAMSIZ
);
4342 params
->primary
[IFNAMSIZ
- 1] = 0;
4345 memcpy(params
->arp_targets
, arp_target
, sizeof(arp_target
));
4350 static struct lock_class_key bonding_netdev_xmit_lock_key
;
4351 static struct lock_class_key bonding_netdev_addr_lock_key
;
4352 static struct lock_class_key bonding_tx_busylock_key
;
4354 static void bond_set_lockdep_class_one(struct net_device
*dev
,
4355 struct netdev_queue
*txq
,
4358 lockdep_set_class(&txq
->_xmit_lock
,
4359 &bonding_netdev_xmit_lock_key
);
4362 static void bond_set_lockdep_class(struct net_device
*dev
)
4364 lockdep_set_class(&dev
->addr_list_lock
,
4365 &bonding_netdev_addr_lock_key
);
4366 netdev_for_each_tx_queue(dev
, bond_set_lockdep_class_one
, NULL
);
4367 dev
->qdisc_tx_busylock
= &bonding_tx_busylock_key
;
4371 * Called from registration process
4373 static int bond_init(struct net_device
*bond_dev
)
4375 struct bonding
*bond
= netdev_priv(bond_dev
);
4376 struct bond_net
*bn
= net_generic(dev_net(bond_dev
), bond_net_id
);
4377 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
4379 netdev_dbg(bond_dev
, "Begin bond_init\n");
4382 * Initialize locks that may be required during
4383 * en/deslave operations. All of the bond_open work
4384 * (of which this is part) should really be moved to
4385 * a phase prior to dev_open
4387 spin_lock_init(&(bond_info
->tx_hashtbl_lock
));
4388 spin_lock_init(&(bond_info
->rx_hashtbl_lock
));
4390 bond
->wq
= create_singlethread_workqueue(bond_dev
->name
);
4394 bond_set_lockdep_class(bond_dev
);
4396 list_add_tail(&bond
->bond_list
, &bn
->dev_list
);
4398 bond_prepare_sysfs_group(bond
);
4400 bond_debug_register(bond
);
4402 /* Ensure valid dev_addr */
4403 if (is_zero_ether_addr(bond_dev
->dev_addr
) &&
4404 bond_dev
->addr_assign_type
== NET_ADDR_PERM
)
4405 eth_hw_addr_random(bond_dev
);
4410 unsigned int bond_get_num_tx_queues(void)
4415 /* Create a new bond based on the specified name and bonding parameters.
4416 * If name is NULL, obtain a suitable "bond%d" name for us.
4417 * Caller must NOT hold rtnl_lock; we need to release it here before we
4418 * set up our sysfs entries.
4420 int bond_create(struct net
*net
, const char *name
)
4422 struct net_device
*bond_dev
;
4427 bond_dev
= alloc_netdev_mq(sizeof(struct bonding
),
4428 name
? name
: "bond%d", NET_NAME_UNKNOWN
,
4429 bond_setup
, tx_queues
);
4431 pr_err("%s: eek! can't alloc netdev!\n", name
);
4436 dev_net_set(bond_dev
, net
);
4437 bond_dev
->rtnl_link_ops
= &bond_link_ops
;
4439 res
= register_netdevice(bond_dev
);
4441 netif_carrier_off(bond_dev
);
4445 bond_destructor(bond_dev
);
4449 static int __net_init
bond_net_init(struct net
*net
)
4451 struct bond_net
*bn
= net_generic(net
, bond_net_id
);
4454 INIT_LIST_HEAD(&bn
->dev_list
);
4456 bond_create_proc_dir(bn
);
4457 bond_create_sysfs(bn
);
4462 static void __net_exit
bond_net_exit(struct net
*net
)
4464 struct bond_net
*bn
= net_generic(net
, bond_net_id
);
4465 struct bonding
*bond
, *tmp_bond
;
4468 bond_destroy_sysfs(bn
);
4470 /* Kill off any bonds created after unregistering bond rtnl ops */
4472 list_for_each_entry_safe(bond
, tmp_bond
, &bn
->dev_list
, bond_list
)
4473 unregister_netdevice_queue(bond
->dev
, &list
);
4474 unregister_netdevice_many(&list
);
4477 bond_destroy_proc_dir(bn
);
4480 static struct pernet_operations bond_net_ops
= {
4481 .init
= bond_net_init
,
4482 .exit
= bond_net_exit
,
4484 .size
= sizeof(struct bond_net
),
4487 static int __init
bonding_init(void)
4492 pr_info("%s", bond_version
);
4494 res
= bond_check_params(&bonding_defaults
);
4498 res
= register_pernet_subsys(&bond_net_ops
);
4502 res
= bond_netlink_init();
4506 bond_create_debugfs();
4508 for (i
= 0; i
< max_bonds
; i
++) {
4509 res
= bond_create(&init_net
, NULL
);
4514 register_netdevice_notifier(&bond_netdev_notifier
);
4518 bond_destroy_debugfs();
4519 bond_netlink_fini();
4521 unregister_pernet_subsys(&bond_net_ops
);
4526 static void __exit
bonding_exit(void)
4528 unregister_netdevice_notifier(&bond_netdev_notifier
);
4530 bond_destroy_debugfs();
4532 bond_netlink_fini();
4533 unregister_pernet_subsys(&bond_net_ops
);
4535 #ifdef CONFIG_NET_POLL_CONTROLLER
4537 * Make sure we don't have an imbalance on our netpoll blocking
4539 WARN_ON(atomic_read(&netpoll_block_tx
));
4543 module_init(bonding_init
);
4544 module_exit(bonding_exit
);
4545 MODULE_LICENSE("GPL");
4546 MODULE_VERSION(DRV_VERSION
);
4547 MODULE_DESCRIPTION(DRV_DESCRIPTION
", v" DRV_VERSION
);
4548 MODULE_AUTHOR("Thomas Davis, tadavis@lbl.gov and many others");