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/icmp.h>
45 #include <linux/icmpv6.h>
46 #include <linux/tcp.h>
47 #include <linux/udp.h>
48 #include <linux/slab.h>
49 #include <linux/string.h>
50 #include <linux/init.h>
51 #include <linux/timer.h>
52 #include <linux/socket.h>
53 #include <linux/ctype.h>
54 #include <linux/inet.h>
55 #include <linux/bitops.h>
58 #include <linux/uaccess.h>
59 #include <linux/errno.h>
60 #include <linux/netdevice.h>
61 #include <linux/inetdevice.h>
62 #include <linux/igmp.h>
63 #include <linux/etherdevice.h>
64 #include <linux/skbuff.h>
66 #include <linux/rtnetlink.h>
67 #include <linux/smp.h>
68 #include <linux/if_ether.h>
70 #include <linux/mii.h>
71 #include <linux/ethtool.h>
72 #include <linux/if_vlan.h>
73 #include <linux/if_bonding.h>
74 #include <linux/jiffies.h>
75 #include <linux/preempt.h>
76 #include <net/route.h>
77 #include <net/net_namespace.h>
78 #include <net/netns/generic.h>
79 #include <net/pkt_sched.h>
80 #include <linux/rculist.h>
81 #include <net/flow_dissector.h>
83 #include <net/bonding.h>
84 #include <net/bond_3ad.h>
85 #include <net/bond_alb.h>
87 #include "bonding_priv.h"
89 /*---------------------------- Module parameters ----------------------------*/
91 /* monitor all links that often (in milliseconds). <=0 disables monitoring */
93 static int max_bonds
= BOND_DEFAULT_MAX_BONDS
;
94 static int tx_queues
= BOND_DEFAULT_TX_QUEUES
;
95 static int num_peer_notif
= 1;
99 static int use_carrier
= 1;
101 static char *primary
;
102 static char *primary_reselect
;
103 static char *lacp_rate
;
104 static int min_links
;
105 static char *ad_select
;
106 static char *xmit_hash_policy
;
107 static int arp_interval
;
108 static char *arp_ip_target
[BOND_MAX_ARP_TARGETS
];
109 static char *arp_validate
;
110 static char *arp_all_targets
;
111 static char *fail_over_mac
;
112 static int all_slaves_active
;
113 static struct bond_params bonding_defaults
;
114 static int resend_igmp
= BOND_DEFAULT_RESEND_IGMP
;
115 static int packets_per_slave
= 1;
116 static int lp_interval
= BOND_ALB_DEFAULT_LP_INTERVAL
;
118 module_param(max_bonds
, int, 0);
119 MODULE_PARM_DESC(max_bonds
, "Max number of bonded devices");
120 module_param(tx_queues
, int, 0);
121 MODULE_PARM_DESC(tx_queues
, "Max number of transmit queues (default = 16)");
122 module_param_named(num_grat_arp
, num_peer_notif
, int, 0644);
123 MODULE_PARM_DESC(num_grat_arp
, "Number of peer notifications to send on "
124 "failover event (alias of num_unsol_na)");
125 module_param_named(num_unsol_na
, num_peer_notif
, int, 0644);
126 MODULE_PARM_DESC(num_unsol_na
, "Number of peer notifications to send on "
127 "failover event (alias of num_grat_arp)");
128 module_param(miimon
, int, 0);
129 MODULE_PARM_DESC(miimon
, "Link check interval in milliseconds");
130 module_param(updelay
, int, 0);
131 MODULE_PARM_DESC(updelay
, "Delay before considering link up, in milliseconds");
132 module_param(downdelay
, int, 0);
133 MODULE_PARM_DESC(downdelay
, "Delay before considering link down, "
135 module_param(use_carrier
, int, 0);
136 MODULE_PARM_DESC(use_carrier
, "Use netif_carrier_ok (vs MII ioctls) in miimon; "
137 "0 for off, 1 for on (default)");
138 module_param(mode
, charp
, 0);
139 MODULE_PARM_DESC(mode
, "Mode of operation; 0 for balance-rr, "
140 "1 for active-backup, 2 for balance-xor, "
141 "3 for broadcast, 4 for 802.3ad, 5 for balance-tlb, "
142 "6 for balance-alb");
143 module_param(primary
, charp
, 0);
144 MODULE_PARM_DESC(primary
, "Primary network device to use");
145 module_param(primary_reselect
, charp
, 0);
146 MODULE_PARM_DESC(primary_reselect
, "Reselect primary slave "
148 "0 for always (default), "
149 "1 for only if speed of primary is "
151 "2 for only on active slave "
153 module_param(lacp_rate
, charp
, 0);
154 MODULE_PARM_DESC(lacp_rate
, "LACPDU tx rate to request from 802.3ad partner; "
155 "0 for slow, 1 for fast");
156 module_param(ad_select
, charp
, 0);
157 MODULE_PARM_DESC(ad_select
, "802.3ad aggregation selection logic; "
158 "0 for stable (default), 1 for bandwidth, "
160 module_param(min_links
, int, 0);
161 MODULE_PARM_DESC(min_links
, "Minimum number of available links before turning on carrier");
163 module_param(xmit_hash_policy
, charp
, 0);
164 MODULE_PARM_DESC(xmit_hash_policy
, "balance-alb, balance-tlb, balance-xor, 802.3ad hashing method; "
165 "0 for layer 2 (default), 1 for layer 3+4, "
166 "2 for layer 2+3, 3 for encap layer 2+3, "
167 "4 for encap layer 3+4");
168 module_param(arp_interval
, int, 0);
169 MODULE_PARM_DESC(arp_interval
, "arp interval in milliseconds");
170 module_param_array(arp_ip_target
, charp
, NULL
, 0);
171 MODULE_PARM_DESC(arp_ip_target
, "arp targets in n.n.n.n form");
172 module_param(arp_validate
, charp
, 0);
173 MODULE_PARM_DESC(arp_validate
, "validate src/dst of ARP probes; "
174 "0 for none (default), 1 for active, "
175 "2 for backup, 3 for all");
176 module_param(arp_all_targets
, charp
, 0);
177 MODULE_PARM_DESC(arp_all_targets
, "fail on any/all arp targets timeout; 0 for any (default), 1 for all");
178 module_param(fail_over_mac
, charp
, 0);
179 MODULE_PARM_DESC(fail_over_mac
, "For active-backup, do not set all slaves to "
180 "the same MAC; 0 for none (default), "
181 "1 for active, 2 for follow");
182 module_param(all_slaves_active
, int, 0);
183 MODULE_PARM_DESC(all_slaves_active
, "Keep all frames received on an interface "
184 "by setting active flag for all slaves; "
185 "0 for never (default), 1 for always.");
186 module_param(resend_igmp
, int, 0);
187 MODULE_PARM_DESC(resend_igmp
, "Number of IGMP membership reports to send on "
189 module_param(packets_per_slave
, int, 0);
190 MODULE_PARM_DESC(packets_per_slave
, "Packets to send per slave in balance-rr "
191 "mode; 0 for a random slave, 1 packet per "
192 "slave (default), >1 packets per slave.");
193 module_param(lp_interval
, uint
, 0);
194 MODULE_PARM_DESC(lp_interval
, "The number of seconds between instances where "
195 "the bonding driver sends learning packets to "
196 "each slaves peer switch. The default is 1.");
198 /*----------------------------- Global variables ----------------------------*/
200 #ifdef CONFIG_NET_POLL_CONTROLLER
201 atomic_t netpoll_block_tx
= ATOMIC_INIT(0);
204 unsigned int bond_net_id __read_mostly
;
206 static const struct flow_dissector_key flow_keys_bonding_keys
[] = {
208 .key_id
= FLOW_DISSECTOR_KEY_CONTROL
,
209 .offset
= offsetof(struct flow_keys
, control
),
212 .key_id
= FLOW_DISSECTOR_KEY_BASIC
,
213 .offset
= offsetof(struct flow_keys
, basic
),
216 .key_id
= FLOW_DISSECTOR_KEY_IPV4_ADDRS
,
217 .offset
= offsetof(struct flow_keys
, addrs
.v4addrs
),
220 .key_id
= FLOW_DISSECTOR_KEY_IPV6_ADDRS
,
221 .offset
= offsetof(struct flow_keys
, addrs
.v6addrs
),
224 .key_id
= FLOW_DISSECTOR_KEY_TIPC
,
225 .offset
= offsetof(struct flow_keys
, addrs
.tipckey
),
228 .key_id
= FLOW_DISSECTOR_KEY_PORTS
,
229 .offset
= offsetof(struct flow_keys
, ports
),
232 .key_id
= FLOW_DISSECTOR_KEY_ICMP
,
233 .offset
= offsetof(struct flow_keys
, icmp
),
236 .key_id
= FLOW_DISSECTOR_KEY_VLAN
,
237 .offset
= offsetof(struct flow_keys
, vlan
),
240 .key_id
= FLOW_DISSECTOR_KEY_FLOW_LABEL
,
241 .offset
= offsetof(struct flow_keys
, tags
),
244 .key_id
= FLOW_DISSECTOR_KEY_GRE_KEYID
,
245 .offset
= offsetof(struct flow_keys
, keyid
),
249 static struct flow_dissector flow_keys_bonding __read_mostly
;
251 /*-------------------------- Forward declarations ---------------------------*/
253 static int bond_init(struct net_device
*bond_dev
);
254 static void bond_uninit(struct net_device
*bond_dev
);
255 static void bond_get_stats(struct net_device
*bond_dev
,
256 struct rtnl_link_stats64
*stats
);
257 static void bond_slave_arr_handler(struct work_struct
*work
);
258 static bool bond_time_in_interval(struct bonding
*bond
, unsigned long last_act
,
260 static void bond_netdev_notify_work(struct work_struct
*work
);
262 /*---------------------------- General routines -----------------------------*/
264 const char *bond_mode_name(int mode
)
266 static const char *names
[] = {
267 [BOND_MODE_ROUNDROBIN
] = "load balancing (round-robin)",
268 [BOND_MODE_ACTIVEBACKUP
] = "fault-tolerance (active-backup)",
269 [BOND_MODE_XOR
] = "load balancing (xor)",
270 [BOND_MODE_BROADCAST
] = "fault-tolerance (broadcast)",
271 [BOND_MODE_8023AD
] = "IEEE 802.3ad Dynamic link aggregation",
272 [BOND_MODE_TLB
] = "transmit load balancing",
273 [BOND_MODE_ALB
] = "adaptive load balancing",
276 if (mode
< BOND_MODE_ROUNDROBIN
|| mode
> BOND_MODE_ALB
)
283 * bond_dev_queue_xmit - Prepare skb for xmit.
285 * @bond: bond device that got this skb for tx.
286 * @skb: hw accel VLAN tagged skb to transmit
287 * @slave_dev: slave that is supposed to xmit this skbuff
289 netdev_tx_t
bond_dev_queue_xmit(struct bonding
*bond
, struct sk_buff
*skb
,
290 struct net_device
*slave_dev
)
292 skb
->dev
= slave_dev
;
294 BUILD_BUG_ON(sizeof(skb
->queue_mapping
) !=
295 sizeof(qdisc_skb_cb(skb
)->slave_dev_queue_mapping
));
296 skb_set_queue_mapping(skb
, qdisc_skb_cb(skb
)->slave_dev_queue_mapping
);
298 if (unlikely(netpoll_tx_running(bond
->dev
)))
299 return bond_netpoll_send_skb(bond_get_slave_by_dev(bond
, slave_dev
), skb
);
301 return dev_queue_xmit(skb
);
304 /*---------------------------------- VLAN -----------------------------------*/
306 /* In the following 2 functions, bond_vlan_rx_add_vid and bond_vlan_rx_kill_vid,
307 * We don't protect the slave list iteration with a lock because:
308 * a. This operation is performed in IOCTL context,
309 * b. The operation is protected by the RTNL semaphore in the 8021q code,
310 * c. Holding a lock with BH disabled while directly calling a base driver
311 * entry point is generally a BAD idea.
313 * The design of synchronization/protection for this operation in the 8021q
314 * module is good for one or more VLAN devices over a single physical device
315 * and cannot be extended for a teaming solution like bonding, so there is a
316 * potential race condition here where a net device from the vlan group might
317 * be referenced (either by a base driver or the 8021q code) while it is being
318 * removed from the system. However, it turns out we're not making matters
319 * worse, and if it works for regular VLAN usage it will work here too.
323 * bond_vlan_rx_add_vid - Propagates adding an id to slaves
324 * @bond_dev: bonding net device that got called
325 * @proto: network protocol ID
326 * @vid: vlan id being added
328 static int bond_vlan_rx_add_vid(struct net_device
*bond_dev
,
329 __be16 proto
, u16 vid
)
331 struct bonding
*bond
= netdev_priv(bond_dev
);
332 struct slave
*slave
, *rollback_slave
;
333 struct list_head
*iter
;
336 bond_for_each_slave(bond
, slave
, iter
) {
337 res
= vlan_vid_add(slave
->dev
, proto
, vid
);
345 /* unwind to the slave that failed */
346 bond_for_each_slave(bond
, rollback_slave
, iter
) {
347 if (rollback_slave
== slave
)
350 vlan_vid_del(rollback_slave
->dev
, proto
, vid
);
357 * bond_vlan_rx_kill_vid - Propagates deleting an id to slaves
358 * @bond_dev: bonding net device that got called
359 * @proto: network protocol ID
360 * @vid: vlan id being removed
362 static int bond_vlan_rx_kill_vid(struct net_device
*bond_dev
,
363 __be16 proto
, u16 vid
)
365 struct bonding
*bond
= netdev_priv(bond_dev
);
366 struct list_head
*iter
;
369 bond_for_each_slave(bond
, slave
, iter
)
370 vlan_vid_del(slave
->dev
, proto
, vid
);
372 if (bond_is_lb(bond
))
373 bond_alb_clear_vlan(bond
, vid
);
378 /*---------------------------------- XFRM -----------------------------------*/
380 #ifdef CONFIG_XFRM_OFFLOAD
382 * bond_ipsec_add_sa - program device with a security association
383 * @xs: pointer to transformer state struct
385 static int bond_ipsec_add_sa(struct xfrm_state
*xs
)
387 struct net_device
*bond_dev
= xs
->xso
.dev
;
388 struct bonding
*bond
;
394 bond
= netdev_priv(bond_dev
);
395 slave
= rcu_dereference(bond
->curr_active_slave
);
396 xs
->xso
.real_dev
= slave
->dev
;
399 if (!(slave
->dev
->xfrmdev_ops
400 && slave
->dev
->xfrmdev_ops
->xdo_dev_state_add
)) {
401 slave_warn(bond_dev
, slave
->dev
, "Slave does not support ipsec offload\n");
405 return slave
->dev
->xfrmdev_ops
->xdo_dev_state_add(xs
);
409 * bond_ipsec_del_sa - clear out this specific SA
410 * @xs: pointer to transformer state struct
412 static void bond_ipsec_del_sa(struct xfrm_state
*xs
)
414 struct net_device
*bond_dev
= xs
->xso
.dev
;
415 struct bonding
*bond
;
421 bond
= netdev_priv(bond_dev
);
422 slave
= rcu_dereference(bond
->curr_active_slave
);
427 xs
->xso
.real_dev
= slave
->dev
;
429 if (!(slave
->dev
->xfrmdev_ops
430 && slave
->dev
->xfrmdev_ops
->xdo_dev_state_delete
)) {
431 slave_warn(bond_dev
, slave
->dev
, "%s: no slave xdo_dev_state_delete\n", __func__
);
435 slave
->dev
->xfrmdev_ops
->xdo_dev_state_delete(xs
);
439 * bond_ipsec_offload_ok - can this packet use the xfrm hw offload
440 * @skb: current data packet
441 * @xs: pointer to transformer state struct
443 static bool bond_ipsec_offload_ok(struct sk_buff
*skb
, struct xfrm_state
*xs
)
445 struct net_device
*bond_dev
= xs
->xso
.dev
;
446 struct bonding
*bond
= netdev_priv(bond_dev
);
447 struct slave
*curr_active
= rcu_dereference(bond
->curr_active_slave
);
448 struct net_device
*slave_dev
= curr_active
->dev
;
450 if (BOND_MODE(bond
) != BOND_MODE_ACTIVEBACKUP
)
453 if (!(slave_dev
->xfrmdev_ops
454 && slave_dev
->xfrmdev_ops
->xdo_dev_offload_ok
)) {
455 slave_warn(bond_dev
, slave_dev
, "%s: no slave xdo_dev_offload_ok\n", __func__
);
459 xs
->xso
.real_dev
= slave_dev
;
460 return slave_dev
->xfrmdev_ops
->xdo_dev_offload_ok(skb
, xs
);
463 static const struct xfrmdev_ops bond_xfrmdev_ops
= {
464 .xdo_dev_state_add
= bond_ipsec_add_sa
,
465 .xdo_dev_state_delete
= bond_ipsec_del_sa
,
466 .xdo_dev_offload_ok
= bond_ipsec_offload_ok
,
468 #endif /* CONFIG_XFRM_OFFLOAD */
470 /*------------------------------- Link status -------------------------------*/
472 /* Set the carrier state for the master according to the state of its
473 * slaves. If any slaves are up, the master is up. In 802.3ad mode,
474 * do special 802.3ad magic.
476 * Returns zero if carrier state does not change, nonzero if it does.
478 int bond_set_carrier(struct bonding
*bond
)
480 struct list_head
*iter
;
483 if (!bond_has_slaves(bond
))
486 if (BOND_MODE(bond
) == BOND_MODE_8023AD
)
487 return bond_3ad_set_carrier(bond
);
489 bond_for_each_slave(bond
, slave
, iter
) {
490 if (slave
->link
== BOND_LINK_UP
) {
491 if (!netif_carrier_ok(bond
->dev
)) {
492 netif_carrier_on(bond
->dev
);
500 if (netif_carrier_ok(bond
->dev
)) {
501 netif_carrier_off(bond
->dev
);
507 /* Get link speed and duplex from the slave's base driver
508 * using ethtool. If for some reason the call fails or the
509 * values are invalid, set speed and duplex to -1,
510 * and return. Return 1 if speed or duplex settings are
511 * UNKNOWN; 0 otherwise.
513 static int bond_update_speed_duplex(struct slave
*slave
)
515 struct net_device
*slave_dev
= slave
->dev
;
516 struct ethtool_link_ksettings ecmd
;
519 slave
->speed
= SPEED_UNKNOWN
;
520 slave
->duplex
= DUPLEX_UNKNOWN
;
522 res
= __ethtool_get_link_ksettings(slave_dev
, &ecmd
);
525 if (ecmd
.base
.speed
== 0 || ecmd
.base
.speed
== ((__u32
)-1))
527 switch (ecmd
.base
.duplex
) {
535 slave
->speed
= ecmd
.base
.speed
;
536 slave
->duplex
= ecmd
.base
.duplex
;
541 const char *bond_slave_link_status(s8 link
)
557 /* if <dev> supports MII link status reporting, check its link status.
559 * We either do MII/ETHTOOL ioctls, or check netif_carrier_ok(),
560 * depending upon the setting of the use_carrier parameter.
562 * Return either BMSR_LSTATUS, meaning that the link is up (or we
563 * can't tell and just pretend it is), or 0, meaning that the link is
566 * If reporting is non-zero, instead of faking link up, return -1 if
567 * both ETHTOOL and MII ioctls fail (meaning the device does not
568 * support them). If use_carrier is set, return whatever it says.
569 * It'd be nice if there was a good way to tell if a driver supports
570 * netif_carrier, but there really isn't.
572 static int bond_check_dev_link(struct bonding
*bond
,
573 struct net_device
*slave_dev
, int reporting
)
575 const struct net_device_ops
*slave_ops
= slave_dev
->netdev_ops
;
576 int (*ioctl
)(struct net_device
*, struct ifreq
*, int);
578 struct mii_ioctl_data
*mii
;
580 if (!reporting
&& !netif_running(slave_dev
))
583 if (bond
->params
.use_carrier
)
584 return netif_carrier_ok(slave_dev
) ? BMSR_LSTATUS
: 0;
586 /* Try to get link status using Ethtool first. */
587 if (slave_dev
->ethtool_ops
->get_link
)
588 return slave_dev
->ethtool_ops
->get_link(slave_dev
) ?
591 /* Ethtool can't be used, fallback to MII ioctls. */
592 ioctl
= slave_ops
->ndo_do_ioctl
;
594 /* TODO: set pointer to correct ioctl on a per team member
595 * bases to make this more efficient. that is, once
596 * we determine the correct ioctl, we will always
597 * call it and not the others for that team
601 /* We cannot assume that SIOCGMIIPHY will also read a
602 * register; not all network drivers (e.g., e100)
606 /* Yes, the mii is overlaid on the ifreq.ifr_ifru */
607 strncpy(ifr
.ifr_name
, slave_dev
->name
, IFNAMSIZ
);
609 if (ioctl(slave_dev
, &ifr
, SIOCGMIIPHY
) == 0) {
610 mii
->reg_num
= MII_BMSR
;
611 if (ioctl(slave_dev
, &ifr
, SIOCGMIIREG
) == 0)
612 return mii
->val_out
& BMSR_LSTATUS
;
616 /* If reporting, report that either there's no dev->do_ioctl,
617 * or both SIOCGMIIREG and get_link failed (meaning that we
618 * cannot report link status). If not reporting, pretend
621 return reporting
? -1 : BMSR_LSTATUS
;
624 /*----------------------------- Multicast list ------------------------------*/
626 /* Push the promiscuity flag down to appropriate slaves */
627 static int bond_set_promiscuity(struct bonding
*bond
, int inc
)
629 struct list_head
*iter
;
632 if (bond_uses_primary(bond
)) {
633 struct slave
*curr_active
= rtnl_dereference(bond
->curr_active_slave
);
636 err
= dev_set_promiscuity(curr_active
->dev
, inc
);
640 bond_for_each_slave(bond
, slave
, iter
) {
641 err
= dev_set_promiscuity(slave
->dev
, inc
);
649 /* Push the allmulti flag down to all slaves */
650 static int bond_set_allmulti(struct bonding
*bond
, int inc
)
652 struct list_head
*iter
;
655 if (bond_uses_primary(bond
)) {
656 struct slave
*curr_active
= rtnl_dereference(bond
->curr_active_slave
);
659 err
= dev_set_allmulti(curr_active
->dev
, inc
);
663 bond_for_each_slave(bond
, slave
, iter
) {
664 err
= dev_set_allmulti(slave
->dev
, inc
);
672 /* Retrieve the list of registered multicast addresses for the bonding
673 * device and retransmit an IGMP JOIN request to the current active
676 static void bond_resend_igmp_join_requests_delayed(struct work_struct
*work
)
678 struct bonding
*bond
= container_of(work
, struct bonding
,
681 if (!rtnl_trylock()) {
682 queue_delayed_work(bond
->wq
, &bond
->mcast_work
, 1);
685 call_netdevice_notifiers(NETDEV_RESEND_IGMP
, bond
->dev
);
687 if (bond
->igmp_retrans
> 1) {
688 bond
->igmp_retrans
--;
689 queue_delayed_work(bond
->wq
, &bond
->mcast_work
, HZ
/5);
694 /* Flush bond's hardware addresses from slave */
695 static void bond_hw_addr_flush(struct net_device
*bond_dev
,
696 struct net_device
*slave_dev
)
698 struct bonding
*bond
= netdev_priv(bond_dev
);
700 dev_uc_unsync(slave_dev
, bond_dev
);
701 dev_mc_unsync(slave_dev
, bond_dev
);
703 if (BOND_MODE(bond
) == BOND_MODE_8023AD
) {
704 /* del lacpdu mc addr from mc list */
705 u8 lacpdu_multicast
[ETH_ALEN
] = MULTICAST_LACPDU_ADDR
;
707 dev_mc_del(slave_dev
, lacpdu_multicast
);
711 /*--------------------------- Active slave change ---------------------------*/
713 /* Update the hardware address list and promisc/allmulti for the new and
714 * old active slaves (if any). Modes that are not using primary keep all
715 * slaves up date at all times; only the modes that use primary need to call
716 * this function to swap these settings during a failover.
718 static void bond_hw_addr_swap(struct bonding
*bond
, struct slave
*new_active
,
719 struct slave
*old_active
)
722 if (bond
->dev
->flags
& IFF_PROMISC
)
723 dev_set_promiscuity(old_active
->dev
, -1);
725 if (bond
->dev
->flags
& IFF_ALLMULTI
)
726 dev_set_allmulti(old_active
->dev
, -1);
728 bond_hw_addr_flush(bond
->dev
, old_active
->dev
);
732 /* FIXME: Signal errors upstream. */
733 if (bond
->dev
->flags
& IFF_PROMISC
)
734 dev_set_promiscuity(new_active
->dev
, 1);
736 if (bond
->dev
->flags
& IFF_ALLMULTI
)
737 dev_set_allmulti(new_active
->dev
, 1);
739 netif_addr_lock_bh(bond
->dev
);
740 dev_uc_sync(new_active
->dev
, bond
->dev
);
741 dev_mc_sync(new_active
->dev
, bond
->dev
);
742 netif_addr_unlock_bh(bond
->dev
);
747 * bond_set_dev_addr - clone slave's address to bond
748 * @bond_dev: bond net device
749 * @slave_dev: slave net device
751 * Should be called with RTNL held.
753 static int bond_set_dev_addr(struct net_device
*bond_dev
,
754 struct net_device
*slave_dev
)
758 slave_dbg(bond_dev
, slave_dev
, "bond_dev=%p slave_dev=%p slave_dev->addr_len=%d\n",
759 bond_dev
, slave_dev
, slave_dev
->addr_len
);
760 err
= dev_pre_changeaddr_notify(bond_dev
, slave_dev
->dev_addr
, NULL
);
764 memcpy(bond_dev
->dev_addr
, slave_dev
->dev_addr
, slave_dev
->addr_len
);
765 bond_dev
->addr_assign_type
= NET_ADDR_STOLEN
;
766 call_netdevice_notifiers(NETDEV_CHANGEADDR
, bond_dev
);
770 static struct slave
*bond_get_old_active(struct bonding
*bond
,
771 struct slave
*new_active
)
774 struct list_head
*iter
;
776 bond_for_each_slave(bond
, slave
, iter
) {
777 if (slave
== new_active
)
780 if (ether_addr_equal(bond
->dev
->dev_addr
, slave
->dev
->dev_addr
))
787 /* bond_do_fail_over_mac
789 * Perform special MAC address swapping for fail_over_mac settings
793 static void bond_do_fail_over_mac(struct bonding
*bond
,
794 struct slave
*new_active
,
795 struct slave
*old_active
)
797 u8 tmp_mac
[MAX_ADDR_LEN
];
798 struct sockaddr_storage ss
;
801 switch (bond
->params
.fail_over_mac
) {
802 case BOND_FOM_ACTIVE
:
804 rv
= bond_set_dev_addr(bond
->dev
, new_active
->dev
);
806 slave_err(bond
->dev
, new_active
->dev
, "Error %d setting bond MAC from slave\n",
810 case BOND_FOM_FOLLOW
:
811 /* if new_active && old_active, swap them
812 * if just old_active, do nothing (going to no active slave)
813 * if just new_active, set new_active to bond's MAC
819 old_active
= bond_get_old_active(bond
, new_active
);
822 bond_hw_addr_copy(tmp_mac
, new_active
->dev
->dev_addr
,
823 new_active
->dev
->addr_len
);
824 bond_hw_addr_copy(ss
.__data
,
825 old_active
->dev
->dev_addr
,
826 old_active
->dev
->addr_len
);
827 ss
.ss_family
= new_active
->dev
->type
;
829 bond_hw_addr_copy(ss
.__data
, bond
->dev
->dev_addr
,
830 bond
->dev
->addr_len
);
831 ss
.ss_family
= bond
->dev
->type
;
834 rv
= dev_set_mac_address(new_active
->dev
,
835 (struct sockaddr
*)&ss
, NULL
);
837 slave_err(bond
->dev
, new_active
->dev
, "Error %d setting MAC of new active slave\n",
845 bond_hw_addr_copy(ss
.__data
, tmp_mac
,
846 new_active
->dev
->addr_len
);
847 ss
.ss_family
= old_active
->dev
->type
;
849 rv
= dev_set_mac_address(old_active
->dev
,
850 (struct sockaddr
*)&ss
, NULL
);
852 slave_err(bond
->dev
, old_active
->dev
, "Error %d setting MAC of old active slave\n",
857 netdev_err(bond
->dev
, "bond_do_fail_over_mac impossible: bad policy %d\n",
858 bond
->params
.fail_over_mac
);
864 static struct slave
*bond_choose_primary_or_current(struct bonding
*bond
)
866 struct slave
*prim
= rtnl_dereference(bond
->primary_slave
);
867 struct slave
*curr
= rtnl_dereference(bond
->curr_active_slave
);
869 if (!prim
|| prim
->link
!= BOND_LINK_UP
) {
870 if (!curr
|| curr
->link
!= BOND_LINK_UP
)
875 if (bond
->force_primary
) {
876 bond
->force_primary
= false;
880 if (!curr
|| curr
->link
!= BOND_LINK_UP
)
883 /* At this point, prim and curr are both up */
884 switch (bond
->params
.primary_reselect
) {
885 case BOND_PRI_RESELECT_ALWAYS
:
887 case BOND_PRI_RESELECT_BETTER
:
888 if (prim
->speed
< curr
->speed
)
890 if (prim
->speed
== curr
->speed
&& prim
->duplex
<= curr
->duplex
)
893 case BOND_PRI_RESELECT_FAILURE
:
896 netdev_err(bond
->dev
, "impossible primary_reselect %d\n",
897 bond
->params
.primary_reselect
);
903 * bond_find_best_slave - select the best available slave to be the active one
904 * @bond: our bonding struct
906 static struct slave
*bond_find_best_slave(struct bonding
*bond
)
908 struct slave
*slave
, *bestslave
= NULL
;
909 struct list_head
*iter
;
910 int mintime
= bond
->params
.updelay
;
912 slave
= bond_choose_primary_or_current(bond
);
916 bond_for_each_slave(bond
, slave
, iter
) {
917 if (slave
->link
== BOND_LINK_UP
)
919 if (slave
->link
== BOND_LINK_BACK
&& bond_slave_is_up(slave
) &&
920 slave
->delay
< mintime
) {
921 mintime
= slave
->delay
;
929 static bool bond_should_notify_peers(struct bonding
*bond
)
934 slave
= rcu_dereference(bond
->curr_active_slave
);
937 netdev_dbg(bond
->dev
, "bond_should_notify_peers: slave %s\n",
938 slave
? slave
->dev
->name
: "NULL");
940 if (!slave
|| !bond
->send_peer_notif
||
941 bond
->send_peer_notif
%
942 max(1, bond
->params
.peer_notif_delay
) != 0 ||
943 !netif_carrier_ok(bond
->dev
) ||
944 test_bit(__LINK_STATE_LINKWATCH_PENDING
, &slave
->dev
->state
))
951 * change_active_interface - change the active slave into the specified one
952 * @bond: our bonding struct
953 * @new_active: the new slave to make the active one
955 * Set the new slave to the bond's settings and unset them on the old
957 * Setting include flags, mc-list, promiscuity, allmulti, etc.
959 * If @new's link state is %BOND_LINK_BACK we'll set it to %BOND_LINK_UP,
960 * because it is apparently the best available slave we have, even though its
961 * updelay hasn't timed out yet.
963 * Caller must hold RTNL.
965 void bond_change_active_slave(struct bonding
*bond
, struct slave
*new_active
)
967 struct slave
*old_active
;
971 old_active
= rtnl_dereference(bond
->curr_active_slave
);
973 if (old_active
== new_active
)
976 #ifdef CONFIG_XFRM_OFFLOAD
977 if (old_active
&& bond
->xs
)
978 bond_ipsec_del_sa(bond
->xs
);
979 #endif /* CONFIG_XFRM_OFFLOAD */
982 new_active
->last_link_up
= jiffies
;
984 if (new_active
->link
== BOND_LINK_BACK
) {
985 if (bond_uses_primary(bond
)) {
986 slave_info(bond
->dev
, new_active
->dev
, "making interface the new active one %d ms earlier\n",
987 (bond
->params
.updelay
- new_active
->delay
) * bond
->params
.miimon
);
990 new_active
->delay
= 0;
991 bond_set_slave_link_state(new_active
, BOND_LINK_UP
,
992 BOND_SLAVE_NOTIFY_NOW
);
994 if (BOND_MODE(bond
) == BOND_MODE_8023AD
)
995 bond_3ad_handle_link_change(new_active
, BOND_LINK_UP
);
997 if (bond_is_lb(bond
))
998 bond_alb_handle_link_change(bond
, new_active
, BOND_LINK_UP
);
1000 if (bond_uses_primary(bond
)) {
1001 slave_info(bond
->dev
, new_active
->dev
, "making interface the new active one\n");
1006 if (bond_uses_primary(bond
))
1007 bond_hw_addr_swap(bond
, new_active
, old_active
);
1009 if (bond_is_lb(bond
)) {
1010 bond_alb_handle_active_change(bond
, new_active
);
1012 bond_set_slave_inactive_flags(old_active
,
1013 BOND_SLAVE_NOTIFY_NOW
);
1015 bond_set_slave_active_flags(new_active
,
1016 BOND_SLAVE_NOTIFY_NOW
);
1018 rcu_assign_pointer(bond
->curr_active_slave
, new_active
);
1021 if (BOND_MODE(bond
) == BOND_MODE_ACTIVEBACKUP
) {
1023 bond_set_slave_inactive_flags(old_active
,
1024 BOND_SLAVE_NOTIFY_NOW
);
1027 bool should_notify_peers
= false;
1029 bond_set_slave_active_flags(new_active
,
1030 BOND_SLAVE_NOTIFY_NOW
);
1032 if (bond
->params
.fail_over_mac
)
1033 bond_do_fail_over_mac(bond
, new_active
,
1036 if (netif_running(bond
->dev
)) {
1037 bond
->send_peer_notif
=
1038 bond
->params
.num_peer_notif
*
1039 max(1, bond
->params
.peer_notif_delay
);
1040 should_notify_peers
=
1041 bond_should_notify_peers(bond
);
1044 call_netdevice_notifiers(NETDEV_BONDING_FAILOVER
, bond
->dev
);
1045 if (should_notify_peers
) {
1046 bond
->send_peer_notif
--;
1047 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS
,
1053 #ifdef CONFIG_XFRM_OFFLOAD
1054 if (new_active
&& bond
->xs
) {
1055 xfrm_dev_state_flush(dev_net(bond
->dev
), bond
->dev
, true);
1056 bond_ipsec_add_sa(bond
->xs
);
1058 #endif /* CONFIG_XFRM_OFFLOAD */
1060 /* resend IGMP joins since active slave has changed or
1061 * all were sent on curr_active_slave.
1062 * resend only if bond is brought up with the affected
1063 * bonding modes and the retransmission is enabled
1065 if (netif_running(bond
->dev
) && (bond
->params
.resend_igmp
> 0) &&
1066 ((bond_uses_primary(bond
) && new_active
) ||
1067 BOND_MODE(bond
) == BOND_MODE_ROUNDROBIN
)) {
1068 bond
->igmp_retrans
= bond
->params
.resend_igmp
;
1069 queue_delayed_work(bond
->wq
, &bond
->mcast_work
, 1);
1074 * bond_select_active_slave - select a new active slave, if needed
1075 * @bond: our bonding struct
1077 * This functions should be called when one of the following occurs:
1078 * - The old curr_active_slave has been released or lost its link.
1079 * - The primary_slave has got its link back.
1080 * - A slave has got its link back and there's no old curr_active_slave.
1082 * Caller must hold RTNL.
1084 void bond_select_active_slave(struct bonding
*bond
)
1086 struct slave
*best_slave
;
1091 best_slave
= bond_find_best_slave(bond
);
1092 if (best_slave
!= rtnl_dereference(bond
->curr_active_slave
)) {
1093 bond_change_active_slave(bond
, best_slave
);
1094 rv
= bond_set_carrier(bond
);
1098 if (netif_carrier_ok(bond
->dev
))
1099 netdev_info(bond
->dev
, "active interface up!\n");
1101 netdev_info(bond
->dev
, "now running without any active interface!\n");
1105 #ifdef CONFIG_NET_POLL_CONTROLLER
1106 static inline int slave_enable_netpoll(struct slave
*slave
)
1111 np
= kzalloc(sizeof(*np
), GFP_KERNEL
);
1116 err
= __netpoll_setup(np
, slave
->dev
);
1125 static inline void slave_disable_netpoll(struct slave
*slave
)
1127 struct netpoll
*np
= slave
->np
;
1137 static void bond_poll_controller(struct net_device
*bond_dev
)
1139 struct bonding
*bond
= netdev_priv(bond_dev
);
1140 struct slave
*slave
= NULL
;
1141 struct list_head
*iter
;
1142 struct ad_info ad_info
;
1144 if (BOND_MODE(bond
) == BOND_MODE_8023AD
)
1145 if (bond_3ad_get_active_agg_info(bond
, &ad_info
))
1148 bond_for_each_slave_rcu(bond
, slave
, iter
) {
1149 if (!bond_slave_is_up(slave
))
1152 if (BOND_MODE(bond
) == BOND_MODE_8023AD
) {
1153 struct aggregator
*agg
=
1154 SLAVE_AD_INFO(slave
)->port
.aggregator
;
1157 agg
->aggregator_identifier
!= ad_info
.aggregator_id
)
1161 netpoll_poll_dev(slave
->dev
);
1165 static void bond_netpoll_cleanup(struct net_device
*bond_dev
)
1167 struct bonding
*bond
= netdev_priv(bond_dev
);
1168 struct list_head
*iter
;
1169 struct slave
*slave
;
1171 bond_for_each_slave(bond
, slave
, iter
)
1172 if (bond_slave_is_up(slave
))
1173 slave_disable_netpoll(slave
);
1176 static int bond_netpoll_setup(struct net_device
*dev
, struct netpoll_info
*ni
)
1178 struct bonding
*bond
= netdev_priv(dev
);
1179 struct list_head
*iter
;
1180 struct slave
*slave
;
1183 bond_for_each_slave(bond
, slave
, iter
) {
1184 err
= slave_enable_netpoll(slave
);
1186 bond_netpoll_cleanup(dev
);
1193 static inline int slave_enable_netpoll(struct slave
*slave
)
1197 static inline void slave_disable_netpoll(struct slave
*slave
)
1200 static void bond_netpoll_cleanup(struct net_device
*bond_dev
)
1205 /*---------------------------------- IOCTL ----------------------------------*/
1207 static netdev_features_t
bond_fix_features(struct net_device
*dev
,
1208 netdev_features_t features
)
1210 struct bonding
*bond
= netdev_priv(dev
);
1211 struct list_head
*iter
;
1212 netdev_features_t mask
;
1213 struct slave
*slave
;
1217 features
&= ~NETIF_F_ONE_FOR_ALL
;
1218 features
|= NETIF_F_ALL_FOR_ALL
;
1220 bond_for_each_slave(bond
, slave
, iter
) {
1221 features
= netdev_increment_features(features
,
1222 slave
->dev
->features
,
1225 features
= netdev_add_tso_features(features
, mask
);
1230 #define BOND_VLAN_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \
1231 NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
1232 NETIF_F_HIGHDMA | NETIF_F_LRO)
1234 #define BOND_ENC_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \
1235 NETIF_F_RXCSUM | NETIF_F_ALL_TSO)
1237 #define BOND_MPLS_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \
1241 static void bond_compute_features(struct bonding
*bond
)
1243 unsigned int dst_release_flag
= IFF_XMIT_DST_RELEASE
|
1244 IFF_XMIT_DST_RELEASE_PERM
;
1245 netdev_features_t vlan_features
= BOND_VLAN_FEATURES
;
1246 netdev_features_t enc_features
= BOND_ENC_FEATURES
;
1247 #ifdef CONFIG_XFRM_OFFLOAD
1248 netdev_features_t xfrm_features
= BOND_XFRM_FEATURES
;
1249 #endif /* CONFIG_XFRM_OFFLOAD */
1250 netdev_features_t mpls_features
= BOND_MPLS_FEATURES
;
1251 struct net_device
*bond_dev
= bond
->dev
;
1252 struct list_head
*iter
;
1253 struct slave
*slave
;
1254 unsigned short max_hard_header_len
= ETH_HLEN
;
1255 unsigned int gso_max_size
= GSO_MAX_SIZE
;
1256 u16 gso_max_segs
= GSO_MAX_SEGS
;
1258 if (!bond_has_slaves(bond
))
1260 vlan_features
&= NETIF_F_ALL_FOR_ALL
;
1261 mpls_features
&= NETIF_F_ALL_FOR_ALL
;
1263 bond_for_each_slave(bond
, slave
, iter
) {
1264 vlan_features
= netdev_increment_features(vlan_features
,
1265 slave
->dev
->vlan_features
, BOND_VLAN_FEATURES
);
1267 enc_features
= netdev_increment_features(enc_features
,
1268 slave
->dev
->hw_enc_features
,
1271 #ifdef CONFIG_XFRM_OFFLOAD
1272 xfrm_features
= netdev_increment_features(xfrm_features
,
1273 slave
->dev
->hw_enc_features
,
1274 BOND_XFRM_FEATURES
);
1275 #endif /* CONFIG_XFRM_OFFLOAD */
1277 mpls_features
= netdev_increment_features(mpls_features
,
1278 slave
->dev
->mpls_features
,
1279 BOND_MPLS_FEATURES
);
1281 dst_release_flag
&= slave
->dev
->priv_flags
;
1282 if (slave
->dev
->hard_header_len
> max_hard_header_len
)
1283 max_hard_header_len
= slave
->dev
->hard_header_len
;
1285 gso_max_size
= min(gso_max_size
, slave
->dev
->gso_max_size
);
1286 gso_max_segs
= min(gso_max_segs
, slave
->dev
->gso_max_segs
);
1288 bond_dev
->hard_header_len
= max_hard_header_len
;
1291 bond_dev
->vlan_features
= vlan_features
;
1292 bond_dev
->hw_enc_features
= enc_features
| NETIF_F_GSO_ENCAP_ALL
|
1293 NETIF_F_HW_VLAN_CTAG_TX
|
1294 NETIF_F_HW_VLAN_STAG_TX
|
1296 #ifdef CONFIG_XFRM_OFFLOAD
1297 bond_dev
->hw_enc_features
|= xfrm_features
;
1298 #endif /* CONFIG_XFRM_OFFLOAD */
1299 bond_dev
->mpls_features
= mpls_features
;
1300 bond_dev
->gso_max_segs
= gso_max_segs
;
1301 netif_set_gso_max_size(bond_dev
, gso_max_size
);
1303 bond_dev
->priv_flags
&= ~IFF_XMIT_DST_RELEASE
;
1304 if ((bond_dev
->priv_flags
& IFF_XMIT_DST_RELEASE_PERM
) &&
1305 dst_release_flag
== (IFF_XMIT_DST_RELEASE
| IFF_XMIT_DST_RELEASE_PERM
))
1306 bond_dev
->priv_flags
|= IFF_XMIT_DST_RELEASE
;
1308 netdev_change_features(bond_dev
);
1311 static void bond_setup_by_slave(struct net_device
*bond_dev
,
1312 struct net_device
*slave_dev
)
1314 bond_dev
->header_ops
= slave_dev
->header_ops
;
1316 bond_dev
->type
= slave_dev
->type
;
1317 bond_dev
->hard_header_len
= slave_dev
->hard_header_len
;
1318 bond_dev
->needed_headroom
= slave_dev
->needed_headroom
;
1319 bond_dev
->addr_len
= slave_dev
->addr_len
;
1321 memcpy(bond_dev
->broadcast
, slave_dev
->broadcast
,
1322 slave_dev
->addr_len
);
1325 /* On bonding slaves other than the currently active slave, suppress
1326 * duplicates except for alb non-mcast/bcast.
1328 static bool bond_should_deliver_exact_match(struct sk_buff
*skb
,
1329 struct slave
*slave
,
1330 struct bonding
*bond
)
1332 if (bond_is_slave_inactive(slave
)) {
1333 if (BOND_MODE(bond
) == BOND_MODE_ALB
&&
1334 skb
->pkt_type
!= PACKET_BROADCAST
&&
1335 skb
->pkt_type
!= PACKET_MULTICAST
)
1342 static rx_handler_result_t
bond_handle_frame(struct sk_buff
**pskb
)
1344 struct sk_buff
*skb
= *pskb
;
1345 struct slave
*slave
;
1346 struct bonding
*bond
;
1347 int (*recv_probe
)(const struct sk_buff
*, struct bonding
*,
1349 int ret
= RX_HANDLER_ANOTHER
;
1351 skb
= skb_share_check(skb
, GFP_ATOMIC
);
1353 return RX_HANDLER_CONSUMED
;
1357 slave
= bond_slave_get_rcu(skb
->dev
);
1360 recv_probe
= READ_ONCE(bond
->recv_probe
);
1362 ret
= recv_probe(skb
, bond
, slave
);
1363 if (ret
== RX_HANDLER_CONSUMED
) {
1370 * For packets determined by bond_should_deliver_exact_match() call to
1371 * be suppressed we want to make an exception for link-local packets.
1372 * This is necessary for e.g. LLDP daemons to be able to monitor
1373 * inactive slave links without being forced to bind to them
1376 * At the same time, packets that are passed to the bonding master
1377 * (including link-local ones) can have their originating interface
1378 * determined via PACKET_ORIGDEV socket option.
1380 if (bond_should_deliver_exact_match(skb
, slave
, bond
)) {
1381 if (is_link_local_ether_addr(eth_hdr(skb
)->h_dest
))
1382 return RX_HANDLER_PASS
;
1383 return RX_HANDLER_EXACT
;
1386 skb
->dev
= bond
->dev
;
1388 if (BOND_MODE(bond
) == BOND_MODE_ALB
&&
1389 netif_is_bridge_port(bond
->dev
) &&
1390 skb
->pkt_type
== PACKET_HOST
) {
1392 if (unlikely(skb_cow_head(skb
,
1393 skb
->data
- skb_mac_header(skb
)))) {
1395 return RX_HANDLER_CONSUMED
;
1397 bond_hw_addr_copy(eth_hdr(skb
)->h_dest
, bond
->dev
->dev_addr
,
1398 bond
->dev
->addr_len
);
1404 static enum netdev_lag_tx_type
bond_lag_tx_type(struct bonding
*bond
)
1406 switch (BOND_MODE(bond
)) {
1407 case BOND_MODE_ROUNDROBIN
:
1408 return NETDEV_LAG_TX_TYPE_ROUNDROBIN
;
1409 case BOND_MODE_ACTIVEBACKUP
:
1410 return NETDEV_LAG_TX_TYPE_ACTIVEBACKUP
;
1411 case BOND_MODE_BROADCAST
:
1412 return NETDEV_LAG_TX_TYPE_BROADCAST
;
1414 case BOND_MODE_8023AD
:
1415 return NETDEV_LAG_TX_TYPE_HASH
;
1417 return NETDEV_LAG_TX_TYPE_UNKNOWN
;
1421 static enum netdev_lag_hash
bond_lag_hash_type(struct bonding
*bond
,
1422 enum netdev_lag_tx_type type
)
1424 if (type
!= NETDEV_LAG_TX_TYPE_HASH
)
1425 return NETDEV_LAG_HASH_NONE
;
1427 switch (bond
->params
.xmit_policy
) {
1428 case BOND_XMIT_POLICY_LAYER2
:
1429 return NETDEV_LAG_HASH_L2
;
1430 case BOND_XMIT_POLICY_LAYER34
:
1431 return NETDEV_LAG_HASH_L34
;
1432 case BOND_XMIT_POLICY_LAYER23
:
1433 return NETDEV_LAG_HASH_L23
;
1434 case BOND_XMIT_POLICY_ENCAP23
:
1435 return NETDEV_LAG_HASH_E23
;
1436 case BOND_XMIT_POLICY_ENCAP34
:
1437 return NETDEV_LAG_HASH_E34
;
1439 return NETDEV_LAG_HASH_UNKNOWN
;
1443 static int bond_master_upper_dev_link(struct bonding
*bond
, struct slave
*slave
,
1444 struct netlink_ext_ack
*extack
)
1446 struct netdev_lag_upper_info lag_upper_info
;
1447 enum netdev_lag_tx_type type
;
1449 type
= bond_lag_tx_type(bond
);
1450 lag_upper_info
.tx_type
= type
;
1451 lag_upper_info
.hash_type
= bond_lag_hash_type(bond
, type
);
1453 return netdev_master_upper_dev_link(slave
->dev
, bond
->dev
, slave
,
1454 &lag_upper_info
, extack
);
1457 static void bond_upper_dev_unlink(struct bonding
*bond
, struct slave
*slave
)
1459 netdev_upper_dev_unlink(slave
->dev
, bond
->dev
);
1460 slave
->dev
->flags
&= ~IFF_SLAVE
;
1463 static struct slave
*bond_alloc_slave(struct bonding
*bond
)
1465 struct slave
*slave
= NULL
;
1467 slave
= kzalloc(sizeof(*slave
), GFP_KERNEL
);
1471 if (BOND_MODE(bond
) == BOND_MODE_8023AD
) {
1472 SLAVE_AD_INFO(slave
) = kzalloc(sizeof(struct ad_slave_info
),
1474 if (!SLAVE_AD_INFO(slave
)) {
1479 INIT_DELAYED_WORK(&slave
->notify_work
, bond_netdev_notify_work
);
1484 static void bond_free_slave(struct slave
*slave
)
1486 struct bonding
*bond
= bond_get_bond_by_slave(slave
);
1488 cancel_delayed_work_sync(&slave
->notify_work
);
1489 if (BOND_MODE(bond
) == BOND_MODE_8023AD
)
1490 kfree(SLAVE_AD_INFO(slave
));
1495 static void bond_fill_ifbond(struct bonding
*bond
, struct ifbond
*info
)
1497 info
->bond_mode
= BOND_MODE(bond
);
1498 info
->miimon
= bond
->params
.miimon
;
1499 info
->num_slaves
= bond
->slave_cnt
;
1502 static void bond_fill_ifslave(struct slave
*slave
, struct ifslave
*info
)
1504 strcpy(info
->slave_name
, slave
->dev
->name
);
1505 info
->link
= slave
->link
;
1506 info
->state
= bond_slave_state(slave
);
1507 info
->link_failure_count
= slave
->link_failure_count
;
1510 static void bond_netdev_notify_work(struct work_struct
*_work
)
1512 struct slave
*slave
= container_of(_work
, struct slave
,
1515 if (rtnl_trylock()) {
1516 struct netdev_bonding_info binfo
;
1518 bond_fill_ifslave(slave
, &binfo
.slave
);
1519 bond_fill_ifbond(slave
->bond
, &binfo
.master
);
1520 netdev_bonding_info_change(slave
->dev
, &binfo
);
1523 queue_delayed_work(slave
->bond
->wq
, &slave
->notify_work
, 1);
1527 void bond_queue_slave_event(struct slave
*slave
)
1529 queue_delayed_work(slave
->bond
->wq
, &slave
->notify_work
, 0);
1532 void bond_lower_state_changed(struct slave
*slave
)
1534 struct netdev_lag_lower_state_info info
;
1536 info
.link_up
= slave
->link
== BOND_LINK_UP
||
1537 slave
->link
== BOND_LINK_FAIL
;
1538 info
.tx_enabled
= bond_is_active_slave(slave
);
1539 netdev_lower_state_changed(slave
->dev
, &info
);
1542 /* enslave device <slave> to bond device <master> */
1543 int bond_enslave(struct net_device
*bond_dev
, struct net_device
*slave_dev
,
1544 struct netlink_ext_ack
*extack
)
1546 struct bonding
*bond
= netdev_priv(bond_dev
);
1547 const struct net_device_ops
*slave_ops
= slave_dev
->netdev_ops
;
1548 struct slave
*new_slave
= NULL
, *prev_slave
;
1549 struct sockaddr_storage ss
;
1553 if (!bond
->params
.use_carrier
&&
1554 slave_dev
->ethtool_ops
->get_link
== NULL
&&
1555 slave_ops
->ndo_do_ioctl
== NULL
) {
1556 slave_warn(bond_dev
, slave_dev
, "no link monitoring support\n");
1559 /* already in-use? */
1560 if (netdev_is_rx_handler_busy(slave_dev
)) {
1561 NL_SET_ERR_MSG(extack
, "Device is in use and cannot be enslaved");
1562 slave_err(bond_dev
, slave_dev
,
1563 "Error: Device is in use and cannot be enslaved\n");
1567 if (bond_dev
== slave_dev
) {
1568 NL_SET_ERR_MSG(extack
, "Cannot enslave bond to itself.");
1569 netdev_err(bond_dev
, "cannot enslave bond to itself.\n");
1573 /* vlan challenged mutual exclusion */
1574 /* no need to lock since we're protected by rtnl_lock */
1575 if (slave_dev
->features
& NETIF_F_VLAN_CHALLENGED
) {
1576 slave_dbg(bond_dev
, slave_dev
, "is NETIF_F_VLAN_CHALLENGED\n");
1577 if (vlan_uses_dev(bond_dev
)) {
1578 NL_SET_ERR_MSG(extack
, "Can not enslave VLAN challenged device to VLAN enabled bond");
1579 slave_err(bond_dev
, slave_dev
, "Error: cannot enslave VLAN challenged slave on VLAN enabled bond\n");
1582 slave_warn(bond_dev
, slave_dev
, "enslaved VLAN challenged slave. Adding VLANs will be blocked as long as it is part of bond.\n");
1585 slave_dbg(bond_dev
, slave_dev
, "is !NETIF_F_VLAN_CHALLENGED\n");
1588 if (slave_dev
->features
& NETIF_F_HW_ESP
)
1589 slave_dbg(bond_dev
, slave_dev
, "is esp-hw-offload capable\n");
1591 /* Old ifenslave binaries are no longer supported. These can
1592 * be identified with moderate accuracy by the state of the slave:
1593 * the current ifenslave will set the interface down prior to
1594 * enslaving it; the old ifenslave will not.
1596 if (slave_dev
->flags
& IFF_UP
) {
1597 NL_SET_ERR_MSG(extack
, "Device can not be enslaved while up");
1598 slave_err(bond_dev
, slave_dev
, "slave is up - this may be due to an out of date ifenslave\n");
1602 /* set bonding device ether type by slave - bonding netdevices are
1603 * created with ether_setup, so when the slave type is not ARPHRD_ETHER
1604 * there is a need to override some of the type dependent attribs/funcs.
1606 * bond ether type mutual exclusion - don't allow slaves of dissimilar
1607 * ether type (eg ARPHRD_ETHER and ARPHRD_INFINIBAND) share the same bond
1609 if (!bond_has_slaves(bond
)) {
1610 if (bond_dev
->type
!= slave_dev
->type
) {
1611 slave_dbg(bond_dev
, slave_dev
, "change device type from %d to %d\n",
1612 bond_dev
->type
, slave_dev
->type
);
1614 res
= call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE
,
1616 res
= notifier_to_errno(res
);
1618 slave_err(bond_dev
, slave_dev
, "refused to change device type\n");
1622 /* Flush unicast and multicast addresses */
1623 dev_uc_flush(bond_dev
);
1624 dev_mc_flush(bond_dev
);
1626 if (slave_dev
->type
!= ARPHRD_ETHER
)
1627 bond_setup_by_slave(bond_dev
, slave_dev
);
1629 ether_setup(bond_dev
);
1630 bond_dev
->priv_flags
&= ~IFF_TX_SKB_SHARING
;
1633 call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE
,
1636 } else if (bond_dev
->type
!= slave_dev
->type
) {
1637 NL_SET_ERR_MSG(extack
, "Device type is different from other slaves");
1638 slave_err(bond_dev
, slave_dev
, "ether type (%d) is different from other slaves (%d), can not enslave it\n",
1639 slave_dev
->type
, bond_dev
->type
);
1643 if (slave_dev
->type
== ARPHRD_INFINIBAND
&&
1644 BOND_MODE(bond
) != BOND_MODE_ACTIVEBACKUP
) {
1645 NL_SET_ERR_MSG(extack
, "Only active-backup mode is supported for infiniband slaves");
1646 slave_warn(bond_dev
, slave_dev
, "Type (%d) supports only active-backup mode\n",
1649 goto err_undo_flags
;
1652 if (!slave_ops
->ndo_set_mac_address
||
1653 slave_dev
->type
== ARPHRD_INFINIBAND
) {
1654 slave_warn(bond_dev
, slave_dev
, "The slave device specified does not support setting the MAC address\n");
1655 if (BOND_MODE(bond
) == BOND_MODE_ACTIVEBACKUP
&&
1656 bond
->params
.fail_over_mac
!= BOND_FOM_ACTIVE
) {
1657 if (!bond_has_slaves(bond
)) {
1658 bond
->params
.fail_over_mac
= BOND_FOM_ACTIVE
;
1659 slave_warn(bond_dev
, slave_dev
, "Setting fail_over_mac to active for active-backup mode\n");
1661 NL_SET_ERR_MSG(extack
, "Slave device does not support setting the MAC address, but fail_over_mac is not set to active");
1662 slave_err(bond_dev
, slave_dev
, "The slave device specified does not support setting the MAC address, but fail_over_mac is not set to active\n");
1664 goto err_undo_flags
;
1669 call_netdevice_notifiers(NETDEV_JOIN
, slave_dev
);
1671 /* If this is the first slave, then we need to set the master's hardware
1672 * address to be the same as the slave's.
1674 if (!bond_has_slaves(bond
) &&
1675 bond
->dev
->addr_assign_type
== NET_ADDR_RANDOM
) {
1676 res
= bond_set_dev_addr(bond
->dev
, slave_dev
);
1678 goto err_undo_flags
;
1681 new_slave
= bond_alloc_slave(bond
);
1684 goto err_undo_flags
;
1687 new_slave
->bond
= bond
;
1688 new_slave
->dev
= slave_dev
;
1689 /* Set the new_slave's queue_id to be zero. Queue ID mapping
1690 * is set via sysfs or module option if desired.
1692 new_slave
->queue_id
= 0;
1694 /* Save slave's original mtu and then set it to match the bond */
1695 new_slave
->original_mtu
= slave_dev
->mtu
;
1696 res
= dev_set_mtu(slave_dev
, bond
->dev
->mtu
);
1698 slave_err(bond_dev
, slave_dev
, "Error %d calling dev_set_mtu\n", res
);
1702 /* Save slave's original ("permanent") mac address for modes
1703 * that need it, and for restoring it upon release, and then
1704 * set it to the master's address
1706 bond_hw_addr_copy(new_slave
->perm_hwaddr
, slave_dev
->dev_addr
,
1707 slave_dev
->addr_len
);
1709 if (!bond
->params
.fail_over_mac
||
1710 BOND_MODE(bond
) != BOND_MODE_ACTIVEBACKUP
) {
1711 /* Set slave to master's mac address. The application already
1712 * set the master's mac address to that of the first slave
1714 memcpy(ss
.__data
, bond_dev
->dev_addr
, bond_dev
->addr_len
);
1715 ss
.ss_family
= slave_dev
->type
;
1716 res
= dev_set_mac_address(slave_dev
, (struct sockaddr
*)&ss
,
1719 slave_err(bond_dev
, slave_dev
, "Error %d calling set_mac_address\n", res
);
1720 goto err_restore_mtu
;
1724 /* set slave flag before open to prevent IPv6 addrconf */
1725 slave_dev
->flags
|= IFF_SLAVE
;
1727 /* open the slave since the application closed it */
1728 res
= dev_open(slave_dev
, extack
);
1730 slave_err(bond_dev
, slave_dev
, "Opening slave failed\n");
1731 goto err_restore_mac
;
1734 slave_dev
->priv_flags
|= IFF_BONDING
;
1735 /* initialize slave stats */
1736 dev_get_stats(new_slave
->dev
, &new_slave
->slave_stats
);
1738 if (bond_is_lb(bond
)) {
1739 /* bond_alb_init_slave() must be called before all other stages since
1740 * it might fail and we do not want to have to undo everything
1742 res
= bond_alb_init_slave(bond
, new_slave
);
1747 res
= vlan_vids_add_by_dev(slave_dev
, bond_dev
);
1749 slave_err(bond_dev
, slave_dev
, "Couldn't add bond vlan ids\n");
1753 prev_slave
= bond_last_slave(bond
);
1755 new_slave
->delay
= 0;
1756 new_slave
->link_failure_count
= 0;
1758 if (bond_update_speed_duplex(new_slave
) &&
1759 bond_needs_speed_duplex(bond
))
1760 new_slave
->link
= BOND_LINK_DOWN
;
1762 new_slave
->last_rx
= jiffies
-
1763 (msecs_to_jiffies(bond
->params
.arp_interval
) + 1);
1764 for (i
= 0; i
< BOND_MAX_ARP_TARGETS
; i
++)
1765 new_slave
->target_last_arp_rx
[i
] = new_slave
->last_rx
;
1767 if (bond
->params
.miimon
&& !bond
->params
.use_carrier
) {
1768 link_reporting
= bond_check_dev_link(bond
, slave_dev
, 1);
1770 if ((link_reporting
== -1) && !bond
->params
.arp_interval
) {
1771 /* miimon is set but a bonded network driver
1772 * does not support ETHTOOL/MII and
1773 * arp_interval is not set. Note: if
1774 * use_carrier is enabled, we will never go
1775 * here (because netif_carrier is always
1776 * supported); thus, we don't need to change
1777 * the messages for netif_carrier.
1779 slave_warn(bond_dev
, slave_dev
, "MII and ETHTOOL support not available for slave, and arp_interval/arp_ip_target module parameters not specified, thus bonding will not detect link failures! see bonding.txt for details\n");
1780 } else if (link_reporting
== -1) {
1781 /* unable get link status using mii/ethtool */
1782 slave_warn(bond_dev
, slave_dev
, "can't get link status from slave; 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");
1786 /* check for initial state */
1787 new_slave
->link
= BOND_LINK_NOCHANGE
;
1788 if (bond
->params
.miimon
) {
1789 if (bond_check_dev_link(bond
, slave_dev
, 0) == BMSR_LSTATUS
) {
1790 if (bond
->params
.updelay
) {
1791 bond_set_slave_link_state(new_slave
,
1793 BOND_SLAVE_NOTIFY_NOW
);
1794 new_slave
->delay
= bond
->params
.updelay
;
1796 bond_set_slave_link_state(new_slave
,
1798 BOND_SLAVE_NOTIFY_NOW
);
1801 bond_set_slave_link_state(new_slave
, BOND_LINK_DOWN
,
1802 BOND_SLAVE_NOTIFY_NOW
);
1804 } else if (bond
->params
.arp_interval
) {
1805 bond_set_slave_link_state(new_slave
,
1806 (netif_carrier_ok(slave_dev
) ?
1807 BOND_LINK_UP
: BOND_LINK_DOWN
),
1808 BOND_SLAVE_NOTIFY_NOW
);
1810 bond_set_slave_link_state(new_slave
, BOND_LINK_UP
,
1811 BOND_SLAVE_NOTIFY_NOW
);
1814 if (new_slave
->link
!= BOND_LINK_DOWN
)
1815 new_slave
->last_link_up
= jiffies
;
1816 slave_dbg(bond_dev
, slave_dev
, "Initial state of slave is BOND_LINK_%s\n",
1817 new_slave
->link
== BOND_LINK_DOWN
? "DOWN" :
1818 (new_slave
->link
== BOND_LINK_UP
? "UP" : "BACK"));
1820 if (bond_uses_primary(bond
) && bond
->params
.primary
[0]) {
1821 /* if there is a primary slave, remember it */
1822 if (strcmp(bond
->params
.primary
, new_slave
->dev
->name
) == 0) {
1823 rcu_assign_pointer(bond
->primary_slave
, new_slave
);
1824 bond
->force_primary
= true;
1828 switch (BOND_MODE(bond
)) {
1829 case BOND_MODE_ACTIVEBACKUP
:
1830 bond_set_slave_inactive_flags(new_slave
,
1831 BOND_SLAVE_NOTIFY_NOW
);
1833 case BOND_MODE_8023AD
:
1834 /* in 802.3ad mode, the internal mechanism
1835 * will activate the slaves in the selected
1838 bond_set_slave_inactive_flags(new_slave
, BOND_SLAVE_NOTIFY_NOW
);
1839 /* if this is the first slave */
1841 SLAVE_AD_INFO(new_slave
)->id
= 1;
1842 /* Initialize AD with the number of times that the AD timer is called in 1 second
1843 * can be called only after the mac address of the bond is set
1845 bond_3ad_initialize(bond
, 1000/AD_TIMER_INTERVAL
);
1847 SLAVE_AD_INFO(new_slave
)->id
=
1848 SLAVE_AD_INFO(prev_slave
)->id
+ 1;
1851 bond_3ad_bind_slave(new_slave
);
1855 bond_set_active_slave(new_slave
);
1856 bond_set_slave_inactive_flags(new_slave
, BOND_SLAVE_NOTIFY_NOW
);
1859 slave_dbg(bond_dev
, slave_dev
, "This slave is always active in trunk mode\n");
1861 /* always active in trunk mode */
1862 bond_set_active_slave(new_slave
);
1864 /* In trunking mode there is little meaning to curr_active_slave
1865 * anyway (it holds no special properties of the bond device),
1866 * so we can change it without calling change_active_interface()
1868 if (!rcu_access_pointer(bond
->curr_active_slave
) &&
1869 new_slave
->link
== BOND_LINK_UP
)
1870 rcu_assign_pointer(bond
->curr_active_slave
, new_slave
);
1873 } /* switch(bond_mode) */
1875 #ifdef CONFIG_NET_POLL_CONTROLLER
1876 if (bond
->dev
->npinfo
) {
1877 if (slave_enable_netpoll(new_slave
)) {
1878 slave_info(bond_dev
, slave_dev
, "master_dev is using netpoll, but new slave device does not support netpoll\n");
1885 if (!(bond_dev
->features
& NETIF_F_LRO
))
1886 dev_disable_lro(slave_dev
);
1888 res
= netdev_rx_handler_register(slave_dev
, bond_handle_frame
,
1891 slave_dbg(bond_dev
, slave_dev
, "Error %d calling netdev_rx_handler_register\n", res
);
1895 res
= bond_master_upper_dev_link(bond
, new_slave
, extack
);
1897 slave_dbg(bond_dev
, slave_dev
, "Error %d calling bond_master_upper_dev_link\n", res
);
1898 goto err_unregister
;
1901 res
= bond_sysfs_slave_add(new_slave
);
1903 slave_dbg(bond_dev
, slave_dev
, "Error %d calling bond_sysfs_slave_add\n", res
);
1904 goto err_upper_unlink
;
1907 /* If the mode uses primary, then the following is handled by
1908 * bond_change_active_slave().
1910 if (!bond_uses_primary(bond
)) {
1911 /* set promiscuity level to new slave */
1912 if (bond_dev
->flags
& IFF_PROMISC
) {
1913 res
= dev_set_promiscuity(slave_dev
, 1);
1918 /* set allmulti level to new slave */
1919 if (bond_dev
->flags
& IFF_ALLMULTI
) {
1920 res
= dev_set_allmulti(slave_dev
, 1);
1922 if (bond_dev
->flags
& IFF_PROMISC
)
1923 dev_set_promiscuity(slave_dev
, -1);
1928 netif_addr_lock_bh(bond_dev
);
1929 dev_mc_sync_multiple(slave_dev
, bond_dev
);
1930 dev_uc_sync_multiple(slave_dev
, bond_dev
);
1931 netif_addr_unlock_bh(bond_dev
);
1933 if (BOND_MODE(bond
) == BOND_MODE_8023AD
) {
1934 /* add lacpdu mc addr to mc list */
1935 u8 lacpdu_multicast
[ETH_ALEN
] = MULTICAST_LACPDU_ADDR
;
1937 dev_mc_add(slave_dev
, lacpdu_multicast
);
1942 bond_compute_features(bond
);
1943 bond_set_carrier(bond
);
1945 if (bond_uses_primary(bond
)) {
1947 bond_select_active_slave(bond
);
1948 unblock_netpoll_tx();
1951 if (bond_mode_can_use_xmit_hash(bond
))
1952 bond_update_slave_arr(bond
, NULL
);
1955 slave_info(bond_dev
, slave_dev
, "Enslaving as %s interface with %s link\n",
1956 bond_is_active_slave(new_slave
) ? "an active" : "a backup",
1957 new_slave
->link
!= BOND_LINK_DOWN
? "an up" : "a down");
1959 /* enslave is successful */
1960 bond_queue_slave_event(new_slave
);
1963 /* Undo stages on error */
1965 bond_sysfs_slave_del(new_slave
);
1968 bond_upper_dev_unlink(bond
, new_slave
);
1971 netdev_rx_handler_unregister(slave_dev
);
1974 vlan_vids_del_by_dev(slave_dev
, bond_dev
);
1975 if (rcu_access_pointer(bond
->primary_slave
) == new_slave
)
1976 RCU_INIT_POINTER(bond
->primary_slave
, NULL
);
1977 if (rcu_access_pointer(bond
->curr_active_slave
) == new_slave
) {
1979 bond_change_active_slave(bond
, NULL
);
1980 bond_select_active_slave(bond
);
1981 unblock_netpoll_tx();
1983 /* either primary_slave or curr_active_slave might've changed */
1985 slave_disable_netpoll(new_slave
);
1988 if (!netif_is_bond_master(slave_dev
))
1989 slave_dev
->priv_flags
&= ~IFF_BONDING
;
1990 dev_close(slave_dev
);
1993 slave_dev
->flags
&= ~IFF_SLAVE
;
1994 if (!bond
->params
.fail_over_mac
||
1995 BOND_MODE(bond
) != BOND_MODE_ACTIVEBACKUP
) {
1996 /* XXX TODO - fom follow mode needs to change master's
1997 * MAC if this slave's MAC is in use by the bond, or at
1998 * least print a warning.
2000 bond_hw_addr_copy(ss
.__data
, new_slave
->perm_hwaddr
,
2001 new_slave
->dev
->addr_len
);
2002 ss
.ss_family
= slave_dev
->type
;
2003 dev_set_mac_address(slave_dev
, (struct sockaddr
*)&ss
, NULL
);
2007 dev_set_mtu(slave_dev
, new_slave
->original_mtu
);
2010 bond_free_slave(new_slave
);
2013 /* Enslave of first slave has failed and we need to fix master's mac */
2014 if (!bond_has_slaves(bond
)) {
2015 if (ether_addr_equal_64bits(bond_dev
->dev_addr
,
2016 slave_dev
->dev_addr
))
2017 eth_hw_addr_random(bond_dev
);
2018 if (bond_dev
->type
!= ARPHRD_ETHER
) {
2019 dev_close(bond_dev
);
2020 ether_setup(bond_dev
);
2021 bond_dev
->flags
|= IFF_MASTER
;
2022 bond_dev
->priv_flags
&= ~IFF_TX_SKB_SHARING
;
2029 /* Try to release the slave device <slave> from the bond device <master>
2030 * It is legal to access curr_active_slave without a lock because all the function
2031 * is RTNL-locked. If "all" is true it means that the function is being called
2032 * while destroying a bond interface and all slaves are being released.
2034 * The rules for slave state should be:
2035 * for Active/Backup:
2036 * Active stays on all backups go down
2037 * for Bonded connections:
2038 * The first up interface should be left on and all others downed.
2040 static int __bond_release_one(struct net_device
*bond_dev
,
2041 struct net_device
*slave_dev
,
2042 bool all
, bool unregister
)
2044 struct bonding
*bond
= netdev_priv(bond_dev
);
2045 struct slave
*slave
, *oldcurrent
;
2046 struct sockaddr_storage ss
;
2047 int old_flags
= bond_dev
->flags
;
2048 netdev_features_t old_features
= bond_dev
->features
;
2050 /* slave is not a slave or master is not master of this slave */
2051 if (!(slave_dev
->flags
& IFF_SLAVE
) ||
2052 !netdev_has_upper_dev(slave_dev
, bond_dev
)) {
2053 slave_dbg(bond_dev
, slave_dev
, "cannot release slave\n");
2059 slave
= bond_get_slave_by_dev(bond
, slave_dev
);
2061 /* not a slave of this bond */
2062 slave_info(bond_dev
, slave_dev
, "interface not enslaved\n");
2063 unblock_netpoll_tx();
2067 bond_set_slave_inactive_flags(slave
, BOND_SLAVE_NOTIFY_NOW
);
2069 bond_sysfs_slave_del(slave
);
2071 /* recompute stats just before removing the slave */
2072 bond_get_stats(bond
->dev
, &bond
->bond_stats
);
2074 bond_upper_dev_unlink(bond
, slave
);
2075 /* unregister rx_handler early so bond_handle_frame wouldn't be called
2076 * for this slave anymore.
2078 netdev_rx_handler_unregister(slave_dev
);
2080 if (BOND_MODE(bond
) == BOND_MODE_8023AD
)
2081 bond_3ad_unbind_slave(slave
);
2083 if (bond_mode_can_use_xmit_hash(bond
))
2084 bond_update_slave_arr(bond
, slave
);
2086 slave_info(bond_dev
, slave_dev
, "Releasing %s interface\n",
2087 bond_is_active_slave(slave
) ? "active" : "backup");
2089 oldcurrent
= rcu_access_pointer(bond
->curr_active_slave
);
2091 RCU_INIT_POINTER(bond
->current_arp_slave
, NULL
);
2093 if (!all
&& (!bond
->params
.fail_over_mac
||
2094 BOND_MODE(bond
) != BOND_MODE_ACTIVEBACKUP
)) {
2095 if (ether_addr_equal_64bits(bond_dev
->dev_addr
, slave
->perm_hwaddr
) &&
2096 bond_has_slaves(bond
))
2097 slave_warn(bond_dev
, slave_dev
, "the permanent HWaddr of slave - %pM - is still in use by bond - set the HWaddr of slave to a different address to avoid conflicts\n",
2098 slave
->perm_hwaddr
);
2101 if (rtnl_dereference(bond
->primary_slave
) == slave
)
2102 RCU_INIT_POINTER(bond
->primary_slave
, NULL
);
2104 if (oldcurrent
== slave
)
2105 bond_change_active_slave(bond
, NULL
);
2107 if (bond_is_lb(bond
)) {
2108 /* Must be called only after the slave has been
2109 * detached from the list and the curr_active_slave
2110 * has been cleared (if our_slave == old_current),
2111 * but before a new active slave is selected.
2113 bond_alb_deinit_slave(bond
, slave
);
2117 RCU_INIT_POINTER(bond
->curr_active_slave
, NULL
);
2118 } else if (oldcurrent
== slave
) {
2119 /* Note that we hold RTNL over this sequence, so there
2120 * is no concern that another slave add/remove event
2123 bond_select_active_slave(bond
);
2126 if (!bond_has_slaves(bond
)) {
2127 bond_set_carrier(bond
);
2128 eth_hw_addr_random(bond_dev
);
2131 unblock_netpoll_tx();
2135 if (!bond_has_slaves(bond
)) {
2136 call_netdevice_notifiers(NETDEV_CHANGEADDR
, bond
->dev
);
2137 call_netdevice_notifiers(NETDEV_RELEASE
, bond
->dev
);
2140 bond_compute_features(bond
);
2141 if (!(bond_dev
->features
& NETIF_F_VLAN_CHALLENGED
) &&
2142 (old_features
& NETIF_F_VLAN_CHALLENGED
))
2143 slave_info(bond_dev
, slave_dev
, "last VLAN challenged slave left bond - VLAN blocking is removed\n");
2145 vlan_vids_del_by_dev(slave_dev
, bond_dev
);
2147 /* If the mode uses primary, then this case was handled above by
2148 * bond_change_active_slave(..., NULL)
2150 if (!bond_uses_primary(bond
)) {
2151 /* unset promiscuity level from slave
2152 * NOTE: The NETDEV_CHANGEADDR call above may change the value
2153 * of the IFF_PROMISC flag in the bond_dev, but we need the
2154 * value of that flag before that change, as that was the value
2155 * when this slave was attached, so we cache at the start of the
2156 * function and use it here. Same goes for ALLMULTI below
2158 if (old_flags
& IFF_PROMISC
)
2159 dev_set_promiscuity(slave_dev
, -1);
2161 /* unset allmulti level from slave */
2162 if (old_flags
& IFF_ALLMULTI
)
2163 dev_set_allmulti(slave_dev
, -1);
2165 bond_hw_addr_flush(bond_dev
, slave_dev
);
2168 slave_disable_netpoll(slave
);
2170 /* close slave before restoring its mac address */
2171 dev_close(slave_dev
);
2173 if (bond
->params
.fail_over_mac
!= BOND_FOM_ACTIVE
||
2174 BOND_MODE(bond
) != BOND_MODE_ACTIVEBACKUP
) {
2175 /* restore original ("permanent") mac address */
2176 bond_hw_addr_copy(ss
.__data
, slave
->perm_hwaddr
,
2177 slave
->dev
->addr_len
);
2178 ss
.ss_family
= slave_dev
->type
;
2179 dev_set_mac_address(slave_dev
, (struct sockaddr
*)&ss
, NULL
);
2183 __dev_set_mtu(slave_dev
, slave
->original_mtu
);
2185 dev_set_mtu(slave_dev
, slave
->original_mtu
);
2187 if (!netif_is_bond_master(slave_dev
))
2188 slave_dev
->priv_flags
&= ~IFF_BONDING
;
2190 bond_free_slave(slave
);
2195 /* A wrapper used because of ndo_del_link */
2196 int bond_release(struct net_device
*bond_dev
, struct net_device
*slave_dev
)
2198 return __bond_release_one(bond_dev
, slave_dev
, false, false);
2201 /* First release a slave and then destroy the bond if no more slaves are left.
2202 * Must be under rtnl_lock when this function is called.
2204 static int bond_release_and_destroy(struct net_device
*bond_dev
,
2205 struct net_device
*slave_dev
)
2207 struct bonding
*bond
= netdev_priv(bond_dev
);
2210 ret
= __bond_release_one(bond_dev
, slave_dev
, false, true);
2211 if (ret
== 0 && !bond_has_slaves(bond
) &&
2212 bond_dev
->reg_state
!= NETREG_UNREGISTERING
) {
2213 bond_dev
->priv_flags
|= IFF_DISABLE_NETPOLL
;
2214 netdev_info(bond_dev
, "Destroying bond\n");
2215 bond_remove_proc_entry(bond
);
2216 unregister_netdevice(bond_dev
);
2221 static void bond_info_query(struct net_device
*bond_dev
, struct ifbond
*info
)
2223 struct bonding
*bond
= netdev_priv(bond_dev
);
2224 bond_fill_ifbond(bond
, info
);
2227 static int bond_slave_info_query(struct net_device
*bond_dev
, struct ifslave
*info
)
2229 struct bonding
*bond
= netdev_priv(bond_dev
);
2230 struct list_head
*iter
;
2231 int i
= 0, res
= -ENODEV
;
2232 struct slave
*slave
;
2234 bond_for_each_slave(bond
, slave
, iter
) {
2235 if (i
++ == (int)info
->slave_id
) {
2237 bond_fill_ifslave(slave
, info
);
2245 /*-------------------------------- Monitoring -------------------------------*/
2247 /* called with rcu_read_lock() */
2248 static int bond_miimon_inspect(struct bonding
*bond
)
2250 int link_state
, commit
= 0;
2251 struct list_head
*iter
;
2252 struct slave
*slave
;
2253 bool ignore_updelay
;
2255 ignore_updelay
= !rcu_dereference(bond
->curr_active_slave
);
2257 bond_for_each_slave_rcu(bond
, slave
, iter
) {
2258 bond_propose_link_state(slave
, BOND_LINK_NOCHANGE
);
2260 link_state
= bond_check_dev_link(bond
, slave
->dev
, 0);
2262 switch (slave
->link
) {
2267 bond_propose_link_state(slave
, BOND_LINK_FAIL
);
2269 slave
->delay
= bond
->params
.downdelay
;
2271 slave_info(bond
->dev
, slave
->dev
, "link status down for %sinterface, disabling it in %d ms\n",
2273 BOND_MODE_ACTIVEBACKUP
) ?
2274 (bond_is_active_slave(slave
) ?
2275 "active " : "backup ") : "",
2276 bond
->params
.downdelay
* bond
->params
.miimon
);
2279 case BOND_LINK_FAIL
:
2281 /* recovered before downdelay expired */
2282 bond_propose_link_state(slave
, BOND_LINK_UP
);
2283 slave
->last_link_up
= jiffies
;
2284 slave_info(bond
->dev
, slave
->dev
, "link status up again after %d ms\n",
2285 (bond
->params
.downdelay
- slave
->delay
) *
2286 bond
->params
.miimon
);
2291 if (slave
->delay
<= 0) {
2292 bond_propose_link_state(slave
, BOND_LINK_DOWN
);
2300 case BOND_LINK_DOWN
:
2304 bond_propose_link_state(slave
, BOND_LINK_BACK
);
2306 slave
->delay
= bond
->params
.updelay
;
2309 slave_info(bond
->dev
, slave
->dev
, "link status up, enabling it in %d ms\n",
2310 ignore_updelay
? 0 :
2311 bond
->params
.updelay
*
2312 bond
->params
.miimon
);
2315 case BOND_LINK_BACK
:
2317 bond_propose_link_state(slave
, BOND_LINK_DOWN
);
2318 slave_info(bond
->dev
, slave
->dev
, "link status down again after %d ms\n",
2319 (bond
->params
.updelay
- slave
->delay
) *
2320 bond
->params
.miimon
);
2328 if (slave
->delay
<= 0) {
2329 bond_propose_link_state(slave
, BOND_LINK_UP
);
2331 ignore_updelay
= false;
2343 static void bond_miimon_link_change(struct bonding
*bond
,
2344 struct slave
*slave
,
2347 switch (BOND_MODE(bond
)) {
2348 case BOND_MODE_8023AD
:
2349 bond_3ad_handle_link_change(slave
, link
);
2353 bond_alb_handle_link_change(bond
, slave
, link
);
2356 bond_update_slave_arr(bond
, NULL
);
2361 static void bond_miimon_commit(struct bonding
*bond
)
2363 struct list_head
*iter
;
2364 struct slave
*slave
, *primary
;
2366 bond_for_each_slave(bond
, slave
, iter
) {
2367 switch (slave
->link_new_state
) {
2368 case BOND_LINK_NOCHANGE
:
2369 /* For 802.3ad mode, check current slave speed and
2370 * duplex again in case its port was disabled after
2371 * invalid speed/duplex reporting but recovered before
2372 * link monitoring could make a decision on the actual
2375 if (BOND_MODE(bond
) == BOND_MODE_8023AD
&&
2376 slave
->link
== BOND_LINK_UP
)
2377 bond_3ad_adapter_speed_duplex_changed(slave
);
2381 if (bond_update_speed_duplex(slave
) &&
2382 bond_needs_speed_duplex(bond
)) {
2383 slave
->link
= BOND_LINK_DOWN
;
2384 if (net_ratelimit())
2385 slave_warn(bond
->dev
, slave
->dev
,
2386 "failed to get link speed/duplex\n");
2389 bond_set_slave_link_state(slave
, BOND_LINK_UP
,
2390 BOND_SLAVE_NOTIFY_NOW
);
2391 slave
->last_link_up
= jiffies
;
2393 primary
= rtnl_dereference(bond
->primary_slave
);
2394 if (BOND_MODE(bond
) == BOND_MODE_8023AD
) {
2395 /* prevent it from being the active one */
2396 bond_set_backup_slave(slave
);
2397 } else if (BOND_MODE(bond
) != BOND_MODE_ACTIVEBACKUP
) {
2398 /* make it immediately active */
2399 bond_set_active_slave(slave
);
2402 slave_info(bond
->dev
, slave
->dev
, "link status definitely up, %u Mbps %s duplex\n",
2403 slave
->speed
== SPEED_UNKNOWN
? 0 : slave
->speed
,
2404 slave
->duplex
? "full" : "half");
2406 bond_miimon_link_change(bond
, slave
, BOND_LINK_UP
);
2408 if (!bond
->curr_active_slave
|| slave
== primary
)
2413 case BOND_LINK_DOWN
:
2414 if (slave
->link_failure_count
< UINT_MAX
)
2415 slave
->link_failure_count
++;
2417 bond_set_slave_link_state(slave
, BOND_LINK_DOWN
,
2418 BOND_SLAVE_NOTIFY_NOW
);
2420 if (BOND_MODE(bond
) == BOND_MODE_ACTIVEBACKUP
||
2421 BOND_MODE(bond
) == BOND_MODE_8023AD
)
2422 bond_set_slave_inactive_flags(slave
,
2423 BOND_SLAVE_NOTIFY_NOW
);
2425 slave_info(bond
->dev
, slave
->dev
, "link status definitely down, disabling slave\n");
2427 bond_miimon_link_change(bond
, slave
, BOND_LINK_DOWN
);
2429 if (slave
== rcu_access_pointer(bond
->curr_active_slave
))
2435 slave_err(bond
->dev
, slave
->dev
, "invalid new link %d on slave\n",
2436 slave
->link_new_state
);
2437 bond_propose_link_state(slave
, BOND_LINK_NOCHANGE
);
2444 bond_select_active_slave(bond
);
2445 unblock_netpoll_tx();
2448 bond_set_carrier(bond
);
2453 * Really a wrapper that splits the mii monitor into two phases: an
2454 * inspection, then (if inspection indicates something needs to be done)
2455 * an acquisition of appropriate locks followed by a commit phase to
2456 * implement whatever link state changes are indicated.
2458 static void bond_mii_monitor(struct work_struct
*work
)
2460 struct bonding
*bond
= container_of(work
, struct bonding
,
2462 bool should_notify_peers
= false;
2464 unsigned long delay
;
2465 struct slave
*slave
;
2466 struct list_head
*iter
;
2468 delay
= msecs_to_jiffies(bond
->params
.miimon
);
2470 if (!bond_has_slaves(bond
))
2474 should_notify_peers
= bond_should_notify_peers(bond
);
2475 commit
= !!bond_miimon_inspect(bond
);
2476 if (bond
->send_peer_notif
) {
2478 if (rtnl_trylock()) {
2479 bond
->send_peer_notif
--;
2487 /* Race avoidance with bond_close cancel of workqueue */
2488 if (!rtnl_trylock()) {
2490 should_notify_peers
= false;
2494 bond_for_each_slave(bond
, slave
, iter
) {
2495 bond_commit_link_state(slave
, BOND_SLAVE_NOTIFY_LATER
);
2497 bond_miimon_commit(bond
);
2499 rtnl_unlock(); /* might sleep, hold no other locks */
2503 if (bond
->params
.miimon
)
2504 queue_delayed_work(bond
->wq
, &bond
->mii_work
, delay
);
2506 if (should_notify_peers
) {
2507 if (!rtnl_trylock())
2509 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS
, bond
->dev
);
2514 static int bond_upper_dev_walk(struct net_device
*upper
,
2515 struct netdev_nested_priv
*priv
)
2517 __be32 ip
= *(__be32
*)priv
->data
;
2519 return ip
== bond_confirm_addr(upper
, 0, ip
);
2522 static bool bond_has_this_ip(struct bonding
*bond
, __be32 ip
)
2524 struct netdev_nested_priv priv
= {
2525 .data
= (void *)&ip
,
2529 if (ip
== bond_confirm_addr(bond
->dev
, 0, ip
))
2533 if (netdev_walk_all_upper_dev_rcu(bond
->dev
, bond_upper_dev_walk
, &priv
))
2540 /* We go to the (large) trouble of VLAN tagging ARP frames because
2541 * switches in VLAN mode (especially if ports are configured as
2542 * "native" to a VLAN) might not pass non-tagged frames.
2544 static void bond_arp_send(struct slave
*slave
, int arp_op
, __be32 dest_ip
,
2545 __be32 src_ip
, struct bond_vlan_tag
*tags
)
2547 struct sk_buff
*skb
;
2548 struct bond_vlan_tag
*outer_tag
= tags
;
2549 struct net_device
*slave_dev
= slave
->dev
;
2550 struct net_device
*bond_dev
= slave
->bond
->dev
;
2552 slave_dbg(bond_dev
, slave_dev
, "arp %d on slave: dst %pI4 src %pI4\n",
2553 arp_op
, &dest_ip
, &src_ip
);
2555 skb
= arp_create(arp_op
, ETH_P_ARP
, dest_ip
, slave_dev
, src_ip
,
2556 NULL
, slave_dev
->dev_addr
, NULL
);
2559 net_err_ratelimited("ARP packet allocation failed\n");
2563 if (!tags
|| tags
->vlan_proto
== VLAN_N_VID
)
2568 /* Go through all the tags backwards and add them to the packet */
2569 while (tags
->vlan_proto
!= VLAN_N_VID
) {
2570 if (!tags
->vlan_id
) {
2575 slave_dbg(bond_dev
, slave_dev
, "inner tag: proto %X vid %X\n",
2576 ntohs(outer_tag
->vlan_proto
), tags
->vlan_id
);
2577 skb
= vlan_insert_tag_set_proto(skb
, tags
->vlan_proto
,
2580 net_err_ratelimited("failed to insert inner VLAN tag\n");
2586 /* Set the outer tag */
2587 if (outer_tag
->vlan_id
) {
2588 slave_dbg(bond_dev
, slave_dev
, "outer tag: proto %X vid %X\n",
2589 ntohs(outer_tag
->vlan_proto
), outer_tag
->vlan_id
);
2590 __vlan_hwaccel_put_tag(skb
, outer_tag
->vlan_proto
,
2591 outer_tag
->vlan_id
);
2598 /* Validate the device path between the @start_dev and the @end_dev.
2599 * The path is valid if the @end_dev is reachable through device
2601 * When the path is validated, collect any vlan information in the
2604 struct bond_vlan_tag
*bond_verify_device_path(struct net_device
*start_dev
,
2605 struct net_device
*end_dev
,
2608 struct bond_vlan_tag
*tags
;
2609 struct net_device
*upper
;
2610 struct list_head
*iter
;
2612 if (start_dev
== end_dev
) {
2613 tags
= kcalloc(level
+ 1, sizeof(*tags
), GFP_ATOMIC
);
2615 return ERR_PTR(-ENOMEM
);
2616 tags
[level
].vlan_proto
= VLAN_N_VID
;
2620 netdev_for_each_upper_dev_rcu(start_dev
, upper
, iter
) {
2621 tags
= bond_verify_device_path(upper
, end_dev
, level
+ 1);
2622 if (IS_ERR_OR_NULL(tags
)) {
2627 if (is_vlan_dev(upper
)) {
2628 tags
[level
].vlan_proto
= vlan_dev_vlan_proto(upper
);
2629 tags
[level
].vlan_id
= vlan_dev_vlan_id(upper
);
2638 static void bond_arp_send_all(struct bonding
*bond
, struct slave
*slave
)
2641 struct bond_vlan_tag
*tags
;
2642 __be32
*targets
= bond
->params
.arp_targets
, addr
;
2645 for (i
= 0; i
< BOND_MAX_ARP_TARGETS
&& targets
[i
]; i
++) {
2646 slave_dbg(bond
->dev
, slave
->dev
, "%s: target %pI4\n",
2647 __func__
, &targets
[i
]);
2650 /* Find out through which dev should the packet go */
2651 rt
= ip_route_output(dev_net(bond
->dev
), targets
[i
], 0,
2654 /* there's no route to target - try to send arp
2655 * probe to generate any traffic (arp_validate=0)
2657 if (bond
->params
.arp_validate
)
2658 net_warn_ratelimited("%s: no route to arp_ip_target %pI4 and arp_validate is set\n",
2661 bond_arp_send(slave
, ARPOP_REQUEST
, targets
[i
],
2666 /* bond device itself */
2667 if (rt
->dst
.dev
== bond
->dev
)
2671 tags
= bond_verify_device_path(bond
->dev
, rt
->dst
.dev
, 0);
2674 if (!IS_ERR_OR_NULL(tags
))
2677 /* Not our device - skip */
2678 slave_dbg(bond
->dev
, slave
->dev
, "no path to arp_ip_target %pI4 via rt.dev %s\n",
2679 &targets
[i
], rt
->dst
.dev
? rt
->dst
.dev
->name
: "NULL");
2685 addr
= bond_confirm_addr(rt
->dst
.dev
, targets
[i
], 0);
2687 bond_arp_send(slave
, ARPOP_REQUEST
, targets
[i
], addr
, tags
);
2692 static void bond_validate_arp(struct bonding
*bond
, struct slave
*slave
, __be32 sip
, __be32 tip
)
2696 if (!sip
|| !bond_has_this_ip(bond
, tip
)) {
2697 slave_dbg(bond
->dev
, slave
->dev
, "%s: sip %pI4 tip %pI4 not found\n",
2698 __func__
, &sip
, &tip
);
2702 i
= bond_get_targets_ip(bond
->params
.arp_targets
, sip
);
2704 slave_dbg(bond
->dev
, slave
->dev
, "%s: sip %pI4 not found in targets\n",
2708 slave
->last_rx
= jiffies
;
2709 slave
->target_last_arp_rx
[i
] = jiffies
;
2712 int bond_arp_rcv(const struct sk_buff
*skb
, struct bonding
*bond
,
2713 struct slave
*slave
)
2715 struct arphdr
*arp
= (struct arphdr
*)skb
->data
;
2716 struct slave
*curr_active_slave
, *curr_arp_slave
;
2717 unsigned char *arp_ptr
;
2719 int is_arp
= skb
->protocol
== __cpu_to_be16(ETH_P_ARP
);
2722 if (!slave_do_arp_validate(bond
, slave
)) {
2723 if ((slave_do_arp_validate_only(bond
) && is_arp
) ||
2724 !slave_do_arp_validate_only(bond
))
2725 slave
->last_rx
= jiffies
;
2726 return RX_HANDLER_ANOTHER
;
2727 } else if (!is_arp
) {
2728 return RX_HANDLER_ANOTHER
;
2731 alen
= arp_hdr_len(bond
->dev
);
2733 slave_dbg(bond
->dev
, slave
->dev
, "%s: skb->dev %s\n",
2734 __func__
, skb
->dev
->name
);
2736 if (alen
> skb_headlen(skb
)) {
2737 arp
= kmalloc(alen
, GFP_ATOMIC
);
2740 if (skb_copy_bits(skb
, 0, arp
, alen
) < 0)
2744 if (arp
->ar_hln
!= bond
->dev
->addr_len
||
2745 skb
->pkt_type
== PACKET_OTHERHOST
||
2746 skb
->pkt_type
== PACKET_LOOPBACK
||
2747 arp
->ar_hrd
!= htons(ARPHRD_ETHER
) ||
2748 arp
->ar_pro
!= htons(ETH_P_IP
) ||
2752 arp_ptr
= (unsigned char *)(arp
+ 1);
2753 arp_ptr
+= bond
->dev
->addr_len
;
2754 memcpy(&sip
, arp_ptr
, 4);
2755 arp_ptr
+= 4 + bond
->dev
->addr_len
;
2756 memcpy(&tip
, arp_ptr
, 4);
2758 slave_dbg(bond
->dev
, slave
->dev
, "%s: %s/%d av %d sv %d sip %pI4 tip %pI4\n",
2759 __func__
, slave
->dev
->name
, bond_slave_state(slave
),
2760 bond
->params
.arp_validate
, slave_do_arp_validate(bond
, slave
),
2763 curr_active_slave
= rcu_dereference(bond
->curr_active_slave
);
2764 curr_arp_slave
= rcu_dereference(bond
->current_arp_slave
);
2766 /* We 'trust' the received ARP enough to validate it if:
2768 * (a) the slave receiving the ARP is active (which includes the
2769 * current ARP slave, if any), or
2771 * (b) the receiving slave isn't active, but there is a currently
2772 * active slave and it received valid arp reply(s) after it became
2773 * the currently active slave, or
2775 * (c) there is an ARP slave that sent an ARP during the prior ARP
2776 * interval, and we receive an ARP reply on any slave. We accept
2777 * these because switch FDB update delays may deliver the ARP
2778 * reply to a slave other than the sender of the ARP request.
2780 * Note: for (b), backup slaves are receiving the broadcast ARP
2781 * request, not a reply. This request passes from the sending
2782 * slave through the L2 switch(es) to the receiving slave. Since
2783 * this is checking the request, sip/tip are swapped for
2786 * This is done to avoid endless looping when we can't reach the
2787 * arp_ip_target and fool ourselves with our own arp requests.
2789 if (bond_is_active_slave(slave
))
2790 bond_validate_arp(bond
, slave
, sip
, tip
);
2791 else if (curr_active_slave
&&
2792 time_after(slave_last_rx(bond
, curr_active_slave
),
2793 curr_active_slave
->last_link_up
))
2794 bond_validate_arp(bond
, slave
, tip
, sip
);
2795 else if (curr_arp_slave
&& (arp
->ar_op
== htons(ARPOP_REPLY
)) &&
2796 bond_time_in_interval(bond
,
2797 dev_trans_start(curr_arp_slave
->dev
), 1))
2798 bond_validate_arp(bond
, slave
, sip
, tip
);
2801 if (arp
!= (struct arphdr
*)skb
->data
)
2803 return RX_HANDLER_ANOTHER
;
2806 /* function to verify if we're in the arp_interval timeslice, returns true if
2807 * (last_act - arp_interval) <= jiffies <= (last_act + mod * arp_interval +
2808 * arp_interval/2) . the arp_interval/2 is needed for really fast networks.
2810 static bool bond_time_in_interval(struct bonding
*bond
, unsigned long last_act
,
2813 int delta_in_ticks
= msecs_to_jiffies(bond
->params
.arp_interval
);
2815 return time_in_range(jiffies
,
2816 last_act
- delta_in_ticks
,
2817 last_act
+ mod
* delta_in_ticks
+ delta_in_ticks
/2);
2820 /* This function is called regularly to monitor each slave's link
2821 * ensuring that traffic is being sent and received when arp monitoring
2822 * is used in load-balancing mode. if the adapter has been dormant, then an
2823 * arp is transmitted to generate traffic. see activebackup_arp_monitor for
2824 * arp monitoring in active backup mode.
2826 static void bond_loadbalance_arp_mon(struct bonding
*bond
)
2828 struct slave
*slave
, *oldcurrent
;
2829 struct list_head
*iter
;
2830 int do_failover
= 0, slave_state_changed
= 0;
2832 if (!bond_has_slaves(bond
))
2837 oldcurrent
= rcu_dereference(bond
->curr_active_slave
);
2838 /* see if any of the previous devices are up now (i.e. they have
2839 * xmt and rcv traffic). the curr_active_slave does not come into
2840 * the picture unless it is null. also, slave->last_link_up is not
2841 * needed here because we send an arp on each slave and give a slave
2842 * as long as it needs to get the tx/rx within the delta.
2843 * TODO: what about up/down delay in arp mode? it wasn't here before
2846 bond_for_each_slave_rcu(bond
, slave
, iter
) {
2847 unsigned long trans_start
= dev_trans_start(slave
->dev
);
2849 bond_propose_link_state(slave
, BOND_LINK_NOCHANGE
);
2851 if (slave
->link
!= BOND_LINK_UP
) {
2852 if (bond_time_in_interval(bond
, trans_start
, 1) &&
2853 bond_time_in_interval(bond
, slave
->last_rx
, 1)) {
2855 bond_propose_link_state(slave
, BOND_LINK_UP
);
2856 slave_state_changed
= 1;
2858 /* primary_slave has no meaning in round-robin
2859 * mode. the window of a slave being up and
2860 * curr_active_slave being null after enslaving
2864 slave_info(bond
->dev
, slave
->dev
, "link status definitely up\n");
2867 slave_info(bond
->dev
, slave
->dev
, "interface is now up\n");
2871 /* slave->link == BOND_LINK_UP */
2873 /* not all switches will respond to an arp request
2874 * when the source ip is 0, so don't take the link down
2875 * if we don't know our ip yet
2877 if (!bond_time_in_interval(bond
, trans_start
, 2) ||
2878 !bond_time_in_interval(bond
, slave
->last_rx
, 2)) {
2880 bond_propose_link_state(slave
, BOND_LINK_DOWN
);
2881 slave_state_changed
= 1;
2883 if (slave
->link_failure_count
< UINT_MAX
)
2884 slave
->link_failure_count
++;
2886 slave_info(bond
->dev
, slave
->dev
, "interface is now down\n");
2888 if (slave
== oldcurrent
)
2893 /* note: if switch is in round-robin mode, all links
2894 * must tx arp to ensure all links rx an arp - otherwise
2895 * links may oscillate or not come up at all; if switch is
2896 * in something like xor mode, there is nothing we can
2897 * do - all replies will be rx'ed on same link causing slaves
2898 * to be unstable during low/no traffic periods
2900 if (bond_slave_is_up(slave
))
2901 bond_arp_send_all(bond
, slave
);
2906 if (do_failover
|| slave_state_changed
) {
2907 if (!rtnl_trylock())
2910 bond_for_each_slave(bond
, slave
, iter
) {
2911 if (slave
->link_new_state
!= BOND_LINK_NOCHANGE
)
2912 slave
->link
= slave
->link_new_state
;
2915 if (slave_state_changed
) {
2916 bond_slave_state_change(bond
);
2917 if (BOND_MODE(bond
) == BOND_MODE_XOR
)
2918 bond_update_slave_arr(bond
, NULL
);
2922 bond_select_active_slave(bond
);
2923 unblock_netpoll_tx();
2929 if (bond
->params
.arp_interval
)
2930 queue_delayed_work(bond
->wq
, &bond
->arp_work
,
2931 msecs_to_jiffies(bond
->params
.arp_interval
));
2934 /* Called to inspect slaves for active-backup mode ARP monitor link state
2935 * changes. Sets proposed link state in slaves to specify what action
2936 * should take place for the slave. Returns 0 if no changes are found, >0
2937 * if changes to link states must be committed.
2939 * Called with rcu_read_lock held.
2941 static int bond_ab_arp_inspect(struct bonding
*bond
)
2943 unsigned long trans_start
, last_rx
;
2944 struct list_head
*iter
;
2945 struct slave
*slave
;
2948 bond_for_each_slave_rcu(bond
, slave
, iter
) {
2949 bond_propose_link_state(slave
, BOND_LINK_NOCHANGE
);
2950 last_rx
= slave_last_rx(bond
, slave
);
2952 if (slave
->link
!= BOND_LINK_UP
) {
2953 if (bond_time_in_interval(bond
, last_rx
, 1)) {
2954 bond_propose_link_state(slave
, BOND_LINK_UP
);
2956 } else if (slave
->link
== BOND_LINK_BACK
) {
2957 bond_propose_link_state(slave
, BOND_LINK_FAIL
);
2963 /* Give slaves 2*delta after being enslaved or made
2964 * active. This avoids bouncing, as the last receive
2965 * times need a full ARP monitor cycle to be updated.
2967 if (bond_time_in_interval(bond
, slave
->last_link_up
, 2))
2970 /* Backup slave is down if:
2971 * - No current_arp_slave AND
2972 * - more than 3*delta since last receive AND
2973 * - the bond has an IP address
2975 * Note: a non-null current_arp_slave indicates
2976 * the curr_active_slave went down and we are
2977 * searching for a new one; under this condition
2978 * we only take the curr_active_slave down - this
2979 * gives each slave a chance to tx/rx traffic
2980 * before being taken out
2982 if (!bond_is_active_slave(slave
) &&
2983 !rcu_access_pointer(bond
->current_arp_slave
) &&
2984 !bond_time_in_interval(bond
, last_rx
, 3)) {
2985 bond_propose_link_state(slave
, BOND_LINK_DOWN
);
2989 /* Active slave is down if:
2990 * - more than 2*delta since transmitting OR
2991 * - (more than 2*delta since receive AND
2992 * the bond has an IP address)
2994 trans_start
= dev_trans_start(slave
->dev
);
2995 if (bond_is_active_slave(slave
) &&
2996 (!bond_time_in_interval(bond
, trans_start
, 2) ||
2997 !bond_time_in_interval(bond
, last_rx
, 2))) {
2998 bond_propose_link_state(slave
, BOND_LINK_DOWN
);
3006 /* Called to commit link state changes noted by inspection step of
3007 * active-backup mode ARP monitor.
3009 * Called with RTNL hold.
3011 static void bond_ab_arp_commit(struct bonding
*bond
)
3013 unsigned long trans_start
;
3014 struct list_head
*iter
;
3015 struct slave
*slave
;
3017 bond_for_each_slave(bond
, slave
, iter
) {
3018 switch (slave
->link_new_state
) {
3019 case BOND_LINK_NOCHANGE
:
3023 trans_start
= dev_trans_start(slave
->dev
);
3024 if (rtnl_dereference(bond
->curr_active_slave
) != slave
||
3025 (!rtnl_dereference(bond
->curr_active_slave
) &&
3026 bond_time_in_interval(bond
, trans_start
, 1))) {
3027 struct slave
*current_arp_slave
;
3029 current_arp_slave
= rtnl_dereference(bond
->current_arp_slave
);
3030 bond_set_slave_link_state(slave
, BOND_LINK_UP
,
3031 BOND_SLAVE_NOTIFY_NOW
);
3032 if (current_arp_slave
) {
3033 bond_set_slave_inactive_flags(
3035 BOND_SLAVE_NOTIFY_NOW
);
3036 RCU_INIT_POINTER(bond
->current_arp_slave
, NULL
);
3039 slave_info(bond
->dev
, slave
->dev
, "link status definitely up\n");
3041 if (!rtnl_dereference(bond
->curr_active_slave
) ||
3042 slave
== rtnl_dereference(bond
->primary_slave
))
3049 case BOND_LINK_DOWN
:
3050 if (slave
->link_failure_count
< UINT_MAX
)
3051 slave
->link_failure_count
++;
3053 bond_set_slave_link_state(slave
, BOND_LINK_DOWN
,
3054 BOND_SLAVE_NOTIFY_NOW
);
3055 bond_set_slave_inactive_flags(slave
,
3056 BOND_SLAVE_NOTIFY_NOW
);
3058 slave_info(bond
->dev
, slave
->dev
, "link status definitely down, disabling slave\n");
3060 if (slave
== rtnl_dereference(bond
->curr_active_slave
)) {
3061 RCU_INIT_POINTER(bond
->current_arp_slave
, NULL
);
3067 case BOND_LINK_FAIL
:
3068 bond_set_slave_link_state(slave
, BOND_LINK_FAIL
,
3069 BOND_SLAVE_NOTIFY_NOW
);
3070 bond_set_slave_inactive_flags(slave
,
3071 BOND_SLAVE_NOTIFY_NOW
);
3073 /* A slave has just been enslaved and has become
3074 * the current active slave.
3076 if (rtnl_dereference(bond
->curr_active_slave
))
3077 RCU_INIT_POINTER(bond
->current_arp_slave
, NULL
);
3081 slave_err(bond
->dev
, slave
->dev
,
3082 "impossible: link_new_state %d on slave\n",
3083 slave
->link_new_state
);
3089 bond_select_active_slave(bond
);
3090 unblock_netpoll_tx();
3093 bond_set_carrier(bond
);
3096 /* Send ARP probes for active-backup mode ARP monitor.
3098 * Called with rcu_read_lock held.
3100 static bool bond_ab_arp_probe(struct bonding
*bond
)
3102 struct slave
*slave
, *before
= NULL
, *new_slave
= NULL
,
3103 *curr_arp_slave
= rcu_dereference(bond
->current_arp_slave
),
3104 *curr_active_slave
= rcu_dereference(bond
->curr_active_slave
);
3105 struct list_head
*iter
;
3107 bool should_notify_rtnl
= BOND_SLAVE_NOTIFY_LATER
;
3109 if (curr_arp_slave
&& curr_active_slave
)
3110 netdev_info(bond
->dev
, "PROBE: c_arp %s && cas %s BAD\n",
3111 curr_arp_slave
->dev
->name
,
3112 curr_active_slave
->dev
->name
);
3114 if (curr_active_slave
) {
3115 bond_arp_send_all(bond
, curr_active_slave
);
3116 return should_notify_rtnl
;
3119 /* if we don't have a curr_active_slave, search for the next available
3120 * backup slave from the current_arp_slave and make it the candidate
3121 * for becoming the curr_active_slave
3124 if (!curr_arp_slave
) {
3125 curr_arp_slave
= bond_first_slave_rcu(bond
);
3126 if (!curr_arp_slave
)
3127 return should_notify_rtnl
;
3130 bond_for_each_slave_rcu(bond
, slave
, iter
) {
3131 if (!found
&& !before
&& bond_slave_is_up(slave
))
3134 if (found
&& !new_slave
&& bond_slave_is_up(slave
))
3136 /* if the link state is up at this point, we
3137 * mark it down - this can happen if we have
3138 * simultaneous link failures and
3139 * reselect_active_interface doesn't make this
3140 * one the current slave so it is still marked
3141 * up when it is actually down
3143 if (!bond_slave_is_up(slave
) && slave
->link
== BOND_LINK_UP
) {
3144 bond_set_slave_link_state(slave
, BOND_LINK_DOWN
,
3145 BOND_SLAVE_NOTIFY_LATER
);
3146 if (slave
->link_failure_count
< UINT_MAX
)
3147 slave
->link_failure_count
++;
3149 bond_set_slave_inactive_flags(slave
,
3150 BOND_SLAVE_NOTIFY_LATER
);
3152 slave_info(bond
->dev
, slave
->dev
, "backup interface is now down\n");
3154 if (slave
== curr_arp_slave
)
3158 if (!new_slave
&& before
)
3164 bond_set_slave_link_state(new_slave
, BOND_LINK_BACK
,
3165 BOND_SLAVE_NOTIFY_LATER
);
3166 bond_set_slave_active_flags(new_slave
, BOND_SLAVE_NOTIFY_LATER
);
3167 bond_arp_send_all(bond
, new_slave
);
3168 new_slave
->last_link_up
= jiffies
;
3169 rcu_assign_pointer(bond
->current_arp_slave
, new_slave
);
3172 bond_for_each_slave_rcu(bond
, slave
, iter
) {
3173 if (slave
->should_notify
|| slave
->should_notify_link
) {
3174 should_notify_rtnl
= BOND_SLAVE_NOTIFY_NOW
;
3178 return should_notify_rtnl
;
3181 static void bond_activebackup_arp_mon(struct bonding
*bond
)
3183 bool should_notify_peers
= false;
3184 bool should_notify_rtnl
= false;
3187 delta_in_ticks
= msecs_to_jiffies(bond
->params
.arp_interval
);
3189 if (!bond_has_slaves(bond
))
3194 should_notify_peers
= bond_should_notify_peers(bond
);
3196 if (bond_ab_arp_inspect(bond
)) {
3199 /* Race avoidance with bond_close flush of workqueue */
3200 if (!rtnl_trylock()) {
3202 should_notify_peers
= false;
3206 bond_ab_arp_commit(bond
);
3212 should_notify_rtnl
= bond_ab_arp_probe(bond
);
3216 if (bond
->params
.arp_interval
)
3217 queue_delayed_work(bond
->wq
, &bond
->arp_work
, delta_in_ticks
);
3219 if (should_notify_peers
|| should_notify_rtnl
) {
3220 if (!rtnl_trylock())
3223 if (should_notify_peers
)
3224 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS
,
3226 if (should_notify_rtnl
) {
3227 bond_slave_state_notify(bond
);
3228 bond_slave_link_notify(bond
);
3235 static void bond_arp_monitor(struct work_struct
*work
)
3237 struct bonding
*bond
= container_of(work
, struct bonding
,
3240 if (BOND_MODE(bond
) == BOND_MODE_ACTIVEBACKUP
)
3241 bond_activebackup_arp_mon(bond
);
3243 bond_loadbalance_arp_mon(bond
);
3246 /*-------------------------- netdev event handling --------------------------*/
3248 /* Change device name */
3249 static int bond_event_changename(struct bonding
*bond
)
3251 bond_remove_proc_entry(bond
);
3252 bond_create_proc_entry(bond
);
3254 bond_debug_reregister(bond
);
3259 static int bond_master_netdev_event(unsigned long event
,
3260 struct net_device
*bond_dev
)
3262 struct bonding
*event_bond
= netdev_priv(bond_dev
);
3264 netdev_dbg(bond_dev
, "%s called\n", __func__
);
3267 case NETDEV_CHANGENAME
:
3268 return bond_event_changename(event_bond
);
3269 case NETDEV_UNREGISTER
:
3270 bond_remove_proc_entry(event_bond
);
3272 case NETDEV_REGISTER
:
3273 bond_create_proc_entry(event_bond
);
3282 static int bond_slave_netdev_event(unsigned long event
,
3283 struct net_device
*slave_dev
)
3285 struct slave
*slave
= bond_slave_get_rtnl(slave_dev
), *primary
;
3286 struct bonding
*bond
;
3287 struct net_device
*bond_dev
;
3289 /* A netdev event can be generated while enslaving a device
3290 * before netdev_rx_handler_register is called in which case
3291 * slave will be NULL
3294 netdev_dbg(slave_dev
, "%s called on NULL slave\n", __func__
);
3298 bond_dev
= slave
->bond
->dev
;
3300 primary
= rtnl_dereference(bond
->primary_slave
);
3302 slave_dbg(bond_dev
, slave_dev
, "%s called\n", __func__
);
3305 case NETDEV_UNREGISTER
:
3306 if (bond_dev
->type
!= ARPHRD_ETHER
)
3307 bond_release_and_destroy(bond_dev
, slave_dev
);
3309 __bond_release_one(bond_dev
, slave_dev
, false, true);
3313 /* For 802.3ad mode only:
3314 * Getting invalid Speed/Duplex values here will put slave
3315 * in weird state. Mark it as link-fail if the link was
3316 * previously up or link-down if it hasn't yet come up, and
3317 * let link-monitoring (miimon) set it right when correct
3318 * speeds/duplex are available.
3320 if (bond_update_speed_duplex(slave
) &&
3321 BOND_MODE(bond
) == BOND_MODE_8023AD
) {
3322 if (slave
->last_link_up
)
3323 slave
->link
= BOND_LINK_FAIL
;
3325 slave
->link
= BOND_LINK_DOWN
;
3328 if (BOND_MODE(bond
) == BOND_MODE_8023AD
)
3329 bond_3ad_adapter_speed_duplex_changed(slave
);
3332 /* Refresh slave-array if applicable!
3333 * If the setup does not use miimon or arpmon (mode-specific!),
3334 * then these events will not cause the slave-array to be
3335 * refreshed. This will cause xmit to use a slave that is not
3336 * usable. Avoid such situation by refeshing the array at these
3337 * events. If these (miimon/arpmon) parameters are configured
3338 * then array gets refreshed twice and that should be fine!
3340 if (bond_mode_can_use_xmit_hash(bond
))
3341 bond_update_slave_arr(bond
, NULL
);
3343 case NETDEV_CHANGEMTU
:
3344 /* TODO: Should slaves be allowed to
3345 * independently alter their MTU? For
3346 * an active-backup bond, slaves need
3347 * not be the same type of device, so
3348 * MTUs may vary. For other modes,
3349 * slaves arguably should have the
3350 * same MTUs. To do this, we'd need to
3351 * take over the slave's change_mtu
3352 * function for the duration of their
3356 case NETDEV_CHANGENAME
:
3357 /* we don't care if we don't have primary set */
3358 if (!bond_uses_primary(bond
) ||
3359 !bond
->params
.primary
[0])
3362 if (slave
== primary
) {
3363 /* slave's name changed - he's no longer primary */
3364 RCU_INIT_POINTER(bond
->primary_slave
, NULL
);
3365 } else if (!strcmp(slave_dev
->name
, bond
->params
.primary
)) {
3366 /* we have a new primary slave */
3367 rcu_assign_pointer(bond
->primary_slave
, slave
);
3368 } else { /* we didn't change primary - exit */
3372 netdev_info(bond
->dev
, "Primary slave changed to %s, reselecting active slave\n",
3373 primary
? slave_dev
->name
: "none");
3376 bond_select_active_slave(bond
);
3377 unblock_netpoll_tx();
3379 case NETDEV_FEAT_CHANGE
:
3380 bond_compute_features(bond
);
3382 case NETDEV_RESEND_IGMP
:
3383 /* Propagate to master device */
3384 call_netdevice_notifiers(event
, slave
->bond
->dev
);
3393 /* bond_netdev_event: handle netdev notifier chain events.
3395 * This function receives events for the netdev chain. The caller (an
3396 * ioctl handler calling blocking_notifier_call_chain) holds the necessary
3397 * locks for us to safely manipulate the slave devices (RTNL lock,
3400 static int bond_netdev_event(struct notifier_block
*this,
3401 unsigned long event
, void *ptr
)
3403 struct net_device
*event_dev
= netdev_notifier_info_to_dev(ptr
);
3405 netdev_dbg(event_dev
, "%s received %s\n",
3406 __func__
, netdev_cmd_to_name(event
));
3408 if (!(event_dev
->priv_flags
& IFF_BONDING
))
3411 if (event_dev
->flags
& IFF_MASTER
) {
3414 ret
= bond_master_netdev_event(event
, event_dev
);
3415 if (ret
!= NOTIFY_DONE
)
3419 if (event_dev
->flags
& IFF_SLAVE
)
3420 return bond_slave_netdev_event(event
, event_dev
);
3425 static struct notifier_block bond_netdev_notifier
= {
3426 .notifier_call
= bond_netdev_event
,
3429 /*---------------------------- Hashing Policies -----------------------------*/
3431 /* L2 hash helper */
3432 static inline u32
bond_eth_hash(struct sk_buff
*skb
)
3434 struct ethhdr
*ep
, hdr_tmp
;
3436 ep
= skb_header_pointer(skb
, 0, sizeof(hdr_tmp
), &hdr_tmp
);
3438 return ep
->h_dest
[5] ^ ep
->h_source
[5] ^ ep
->h_proto
;
3442 static bool bond_flow_ip(struct sk_buff
*skb
, struct flow_keys
*fk
,
3443 int *noff
, int *proto
, bool l34
)
3445 const struct ipv6hdr
*iph6
;
3446 const struct iphdr
*iph
;
3448 if (skb
->protocol
== htons(ETH_P_IP
)) {
3449 if (unlikely(!pskb_may_pull(skb
, *noff
+ sizeof(*iph
))))
3451 iph
= (const struct iphdr
*)(skb
->data
+ *noff
);
3452 iph_to_flow_copy_v4addrs(fk
, iph
);
3453 *noff
+= iph
->ihl
<< 2;
3454 if (!ip_is_fragment(iph
))
3455 *proto
= iph
->protocol
;
3456 } else if (skb
->protocol
== htons(ETH_P_IPV6
)) {
3457 if (unlikely(!pskb_may_pull(skb
, *noff
+ sizeof(*iph6
))))
3459 iph6
= (const struct ipv6hdr
*)(skb
->data
+ *noff
);
3460 iph_to_flow_copy_v6addrs(fk
, iph6
);
3461 *noff
+= sizeof(*iph6
);
3462 *proto
= iph6
->nexthdr
;
3467 if (l34
&& *proto
>= 0)
3468 fk
->ports
.ports
= skb_flow_get_ports(skb
, *noff
, *proto
);
3473 /* Extract the appropriate headers based on bond's xmit policy */
3474 static bool bond_flow_dissect(struct bonding
*bond
, struct sk_buff
*skb
,
3475 struct flow_keys
*fk
)
3477 bool l34
= bond
->params
.xmit_policy
== BOND_XMIT_POLICY_LAYER34
;
3478 int noff
, proto
= -1;
3480 if (bond
->params
.xmit_policy
> BOND_XMIT_POLICY_LAYER23
) {
3481 memset(fk
, 0, sizeof(*fk
));
3482 return __skb_flow_dissect(NULL
, skb
, &flow_keys_bonding
,
3483 fk
, NULL
, 0, 0, 0, 0);
3486 fk
->ports
.ports
= 0;
3487 memset(&fk
->icmp
, 0, sizeof(fk
->icmp
));
3488 noff
= skb_network_offset(skb
);
3489 if (!bond_flow_ip(skb
, fk
, &noff
, &proto
, l34
))
3492 /* ICMP error packets contains at least 8 bytes of the header
3493 * of the packet which generated the error. Use this information
3494 * to correlate ICMP error packets within the same flow which
3495 * generated the error.
3497 if (proto
== IPPROTO_ICMP
|| proto
== IPPROTO_ICMPV6
) {
3498 skb_flow_get_icmp_tci(skb
, &fk
->icmp
, skb
->data
,
3499 skb_transport_offset(skb
),
3501 if (proto
== IPPROTO_ICMP
) {
3502 if (!icmp_is_err(fk
->icmp
.type
))
3505 noff
+= sizeof(struct icmphdr
);
3506 } else if (proto
== IPPROTO_ICMPV6
) {
3507 if (!icmpv6_is_err(fk
->icmp
.type
))
3510 noff
+= sizeof(struct icmp6hdr
);
3512 return bond_flow_ip(skb
, fk
, &noff
, &proto
, l34
);
3519 * bond_xmit_hash - generate a hash value based on the xmit policy
3520 * @bond: bonding device
3521 * @skb: buffer to use for headers
3523 * This function will extract the necessary headers from the skb buffer and use
3524 * them to generate a hash based on the xmit_policy set in the bonding device
3526 u32
bond_xmit_hash(struct bonding
*bond
, struct sk_buff
*skb
)
3528 struct flow_keys flow
;
3531 if (bond
->params
.xmit_policy
== BOND_XMIT_POLICY_ENCAP34
&&
3535 if (bond
->params
.xmit_policy
== BOND_XMIT_POLICY_LAYER2
||
3536 !bond_flow_dissect(bond
, skb
, &flow
))
3537 return bond_eth_hash(skb
);
3539 if (bond
->params
.xmit_policy
== BOND_XMIT_POLICY_LAYER23
||
3540 bond
->params
.xmit_policy
== BOND_XMIT_POLICY_ENCAP23
) {
3541 hash
= bond_eth_hash(skb
);
3544 memcpy(&hash
, &flow
.icmp
, sizeof(hash
));
3546 memcpy(&hash
, &flow
.ports
.ports
, sizeof(hash
));
3548 hash
^= (__force u32
)flow_get_u32_dst(&flow
) ^
3549 (__force u32
)flow_get_u32_src(&flow
);
3550 hash
^= (hash
>> 16);
3551 hash
^= (hash
>> 8);
3556 /*-------------------------- Device entry points ----------------------------*/
3558 void bond_work_init_all(struct bonding
*bond
)
3560 INIT_DELAYED_WORK(&bond
->mcast_work
,
3561 bond_resend_igmp_join_requests_delayed
);
3562 INIT_DELAYED_WORK(&bond
->alb_work
, bond_alb_monitor
);
3563 INIT_DELAYED_WORK(&bond
->mii_work
, bond_mii_monitor
);
3564 INIT_DELAYED_WORK(&bond
->arp_work
, bond_arp_monitor
);
3565 INIT_DELAYED_WORK(&bond
->ad_work
, bond_3ad_state_machine_handler
);
3566 INIT_DELAYED_WORK(&bond
->slave_arr_work
, bond_slave_arr_handler
);
3569 static void bond_work_cancel_all(struct bonding
*bond
)
3571 cancel_delayed_work_sync(&bond
->mii_work
);
3572 cancel_delayed_work_sync(&bond
->arp_work
);
3573 cancel_delayed_work_sync(&bond
->alb_work
);
3574 cancel_delayed_work_sync(&bond
->ad_work
);
3575 cancel_delayed_work_sync(&bond
->mcast_work
);
3576 cancel_delayed_work_sync(&bond
->slave_arr_work
);
3579 static int bond_open(struct net_device
*bond_dev
)
3581 struct bonding
*bond
= netdev_priv(bond_dev
);
3582 struct list_head
*iter
;
3583 struct slave
*slave
;
3585 /* reset slave->backup and slave->inactive */
3586 if (bond_has_slaves(bond
)) {
3587 bond_for_each_slave(bond
, slave
, iter
) {
3588 if (bond_uses_primary(bond
) &&
3589 slave
!= rcu_access_pointer(bond
->curr_active_slave
)) {
3590 bond_set_slave_inactive_flags(slave
,
3591 BOND_SLAVE_NOTIFY_NOW
);
3592 } else if (BOND_MODE(bond
) != BOND_MODE_8023AD
) {
3593 bond_set_slave_active_flags(slave
,
3594 BOND_SLAVE_NOTIFY_NOW
);
3599 if (bond_is_lb(bond
)) {
3600 /* bond_alb_initialize must be called before the timer
3603 if (bond_alb_initialize(bond
, (BOND_MODE(bond
) == BOND_MODE_ALB
)))
3605 if (bond
->params
.tlb_dynamic_lb
|| BOND_MODE(bond
) == BOND_MODE_ALB
)
3606 queue_delayed_work(bond
->wq
, &bond
->alb_work
, 0);
3609 if (bond
->params
.miimon
) /* link check interval, in milliseconds. */
3610 queue_delayed_work(bond
->wq
, &bond
->mii_work
, 0);
3612 if (bond
->params
.arp_interval
) { /* arp interval, in milliseconds. */
3613 queue_delayed_work(bond
->wq
, &bond
->arp_work
, 0);
3614 bond
->recv_probe
= bond_arp_rcv
;
3617 if (BOND_MODE(bond
) == BOND_MODE_8023AD
) {
3618 queue_delayed_work(bond
->wq
, &bond
->ad_work
, 0);
3619 /* register to receive LACPDUs */
3620 bond
->recv_probe
= bond_3ad_lacpdu_recv
;
3621 bond_3ad_initiate_agg_selection(bond
, 1);
3624 if (bond_mode_can_use_xmit_hash(bond
))
3625 bond_update_slave_arr(bond
, NULL
);
3630 static int bond_close(struct net_device
*bond_dev
)
3632 struct bonding
*bond
= netdev_priv(bond_dev
);
3634 bond_work_cancel_all(bond
);
3635 bond
->send_peer_notif
= 0;
3636 if (bond_is_lb(bond
))
3637 bond_alb_deinitialize(bond
);
3638 bond
->recv_probe
= NULL
;
3643 /* fold stats, assuming all rtnl_link_stats64 fields are u64, but
3644 * that some drivers can provide 32bit values only.
3646 static void bond_fold_stats(struct rtnl_link_stats64
*_res
,
3647 const struct rtnl_link_stats64
*_new
,
3648 const struct rtnl_link_stats64
*_old
)
3650 const u64
*new = (const u64
*)_new
;
3651 const u64
*old
= (const u64
*)_old
;
3652 u64
*res
= (u64
*)_res
;
3655 for (i
= 0; i
< sizeof(*_res
) / sizeof(u64
); i
++) {
3658 s64 delta
= nv
- ov
;
3660 /* detects if this particular field is 32bit only */
3661 if (((nv
| ov
) >> 32) == 0)
3662 delta
= (s64
)(s32
)((u32
)nv
- (u32
)ov
);
3664 /* filter anomalies, some drivers reset their stats
3665 * at down/up events.
3672 #ifdef CONFIG_LOCKDEP
3673 static int bond_get_lowest_level_rcu(struct net_device
*dev
)
3675 struct net_device
*ldev
, *next
, *now
, *dev_stack
[MAX_NEST_DEV
+ 1];
3676 struct list_head
*niter
, *iter
, *iter_stack
[MAX_NEST_DEV
+ 1];
3677 int cur
= 0, max
= 0;
3680 iter
= &dev
->adj_list
.lower
;
3685 ldev
= netdev_next_lower_dev_rcu(now
, &iter
);
3690 niter
= &ldev
->adj_list
.lower
;
3691 dev_stack
[cur
] = now
;
3692 iter_stack
[cur
++] = iter
;
3701 next
= dev_stack
[--cur
];
3702 niter
= iter_stack
[cur
];
3713 static void bond_get_stats(struct net_device
*bond_dev
,
3714 struct rtnl_link_stats64
*stats
)
3716 struct bonding
*bond
= netdev_priv(bond_dev
);
3717 struct rtnl_link_stats64 temp
;
3718 struct list_head
*iter
;
3719 struct slave
*slave
;
3724 #ifdef CONFIG_LOCKDEP
3725 nest_level
= bond_get_lowest_level_rcu(bond_dev
);
3728 spin_lock_nested(&bond
->stats_lock
, nest_level
);
3729 memcpy(stats
, &bond
->bond_stats
, sizeof(*stats
));
3731 bond_for_each_slave_rcu(bond
, slave
, iter
) {
3732 const struct rtnl_link_stats64
*new =
3733 dev_get_stats(slave
->dev
, &temp
);
3735 bond_fold_stats(stats
, new, &slave
->slave_stats
);
3737 /* save off the slave stats for the next run */
3738 memcpy(&slave
->slave_stats
, new, sizeof(*new));
3741 memcpy(&bond
->bond_stats
, stats
, sizeof(*stats
));
3742 spin_unlock(&bond
->stats_lock
);
3746 static int bond_do_ioctl(struct net_device
*bond_dev
, struct ifreq
*ifr
, int cmd
)
3748 struct bonding
*bond
= netdev_priv(bond_dev
);
3749 struct net_device
*slave_dev
= NULL
;
3750 struct ifbond k_binfo
;
3751 struct ifbond __user
*u_binfo
= NULL
;
3752 struct ifslave k_sinfo
;
3753 struct ifslave __user
*u_sinfo
= NULL
;
3754 struct mii_ioctl_data
*mii
= NULL
;
3755 struct bond_opt_value newval
;
3759 netdev_dbg(bond_dev
, "bond_ioctl: cmd=%d\n", cmd
);
3770 /* We do this again just in case we were called by SIOCGMIIREG
3771 * instead of SIOCGMIIPHY.
3777 if (mii
->reg_num
== 1) {
3779 if (netif_carrier_ok(bond
->dev
))
3780 mii
->val_out
= BMSR_LSTATUS
;
3784 case BOND_INFO_QUERY_OLD
:
3785 case SIOCBONDINFOQUERY
:
3786 u_binfo
= (struct ifbond __user
*)ifr
->ifr_data
;
3788 if (copy_from_user(&k_binfo
, u_binfo
, sizeof(ifbond
)))
3791 bond_info_query(bond_dev
, &k_binfo
);
3792 if (copy_to_user(u_binfo
, &k_binfo
, sizeof(ifbond
)))
3796 case BOND_SLAVE_INFO_QUERY_OLD
:
3797 case SIOCBONDSLAVEINFOQUERY
:
3798 u_sinfo
= (struct ifslave __user
*)ifr
->ifr_data
;
3800 if (copy_from_user(&k_sinfo
, u_sinfo
, sizeof(ifslave
)))
3803 res
= bond_slave_info_query(bond_dev
, &k_sinfo
);
3805 copy_to_user(u_sinfo
, &k_sinfo
, sizeof(ifslave
)))
3813 net
= dev_net(bond_dev
);
3815 if (!ns_capable(net
->user_ns
, CAP_NET_ADMIN
))
3818 slave_dev
= __dev_get_by_name(net
, ifr
->ifr_slave
);
3820 slave_dbg(bond_dev
, slave_dev
, "slave_dev=%p:\n", slave_dev
);
3826 case BOND_ENSLAVE_OLD
:
3827 case SIOCBONDENSLAVE
:
3828 res
= bond_enslave(bond_dev
, slave_dev
, NULL
);
3830 case BOND_RELEASE_OLD
:
3831 case SIOCBONDRELEASE
:
3832 res
= bond_release(bond_dev
, slave_dev
);
3834 case BOND_SETHWADDR_OLD
:
3835 case SIOCBONDSETHWADDR
:
3836 res
= bond_set_dev_addr(bond_dev
, slave_dev
);
3838 case BOND_CHANGE_ACTIVE_OLD
:
3839 case SIOCBONDCHANGEACTIVE
:
3840 bond_opt_initstr(&newval
, slave_dev
->name
);
3841 res
= __bond_opt_set_notify(bond
, BOND_OPT_ACTIVE_SLAVE
,
3851 static void bond_change_rx_flags(struct net_device
*bond_dev
, int change
)
3853 struct bonding
*bond
= netdev_priv(bond_dev
);
3855 if (change
& IFF_PROMISC
)
3856 bond_set_promiscuity(bond
,
3857 bond_dev
->flags
& IFF_PROMISC
? 1 : -1);
3859 if (change
& IFF_ALLMULTI
)
3860 bond_set_allmulti(bond
,
3861 bond_dev
->flags
& IFF_ALLMULTI
? 1 : -1);
3864 static void bond_set_rx_mode(struct net_device
*bond_dev
)
3866 struct bonding
*bond
= netdev_priv(bond_dev
);
3867 struct list_head
*iter
;
3868 struct slave
*slave
;
3871 if (bond_uses_primary(bond
)) {
3872 slave
= rcu_dereference(bond
->curr_active_slave
);
3874 dev_uc_sync(slave
->dev
, bond_dev
);
3875 dev_mc_sync(slave
->dev
, bond_dev
);
3878 bond_for_each_slave_rcu(bond
, slave
, iter
) {
3879 dev_uc_sync_multiple(slave
->dev
, bond_dev
);
3880 dev_mc_sync_multiple(slave
->dev
, bond_dev
);
3886 static int bond_neigh_init(struct neighbour
*n
)
3888 struct bonding
*bond
= netdev_priv(n
->dev
);
3889 const struct net_device_ops
*slave_ops
;
3890 struct neigh_parms parms
;
3891 struct slave
*slave
;
3895 slave
= bond_first_slave_rcu(bond
);
3898 slave_ops
= slave
->dev
->netdev_ops
;
3899 if (!slave_ops
->ndo_neigh_setup
)
3902 /* TODO: find another way [1] to implement this.
3903 * Passing a zeroed structure is fragile,
3904 * but at least we do not pass garbage.
3906 * [1] One way would be that ndo_neigh_setup() never touch
3907 * struct neigh_parms, but propagate the new neigh_setup()
3908 * back to ___neigh_create() / neigh_parms_alloc()
3910 memset(&parms
, 0, sizeof(parms
));
3911 ret
= slave_ops
->ndo_neigh_setup(slave
->dev
, &parms
);
3916 if (parms
.neigh_setup
)
3917 ret
= parms
.neigh_setup(n
);
3923 /* The bonding ndo_neigh_setup is called at init time beofre any
3924 * slave exists. So we must declare proxy setup function which will
3925 * be used at run time to resolve the actual slave neigh param setup.
3927 * It's also called by master devices (such as vlans) to setup their
3928 * underlying devices. In that case - do nothing, we're already set up from
3931 static int bond_neigh_setup(struct net_device
*dev
,
3932 struct neigh_parms
*parms
)
3934 /* modify only our neigh_parms */
3935 if (parms
->dev
== dev
)
3936 parms
->neigh_setup
= bond_neigh_init
;
3941 /* Change the MTU of all of a master's slaves to match the master */
3942 static int bond_change_mtu(struct net_device
*bond_dev
, int new_mtu
)
3944 struct bonding
*bond
= netdev_priv(bond_dev
);
3945 struct slave
*slave
, *rollback_slave
;
3946 struct list_head
*iter
;
3949 netdev_dbg(bond_dev
, "bond=%p, new_mtu=%d\n", bond
, new_mtu
);
3951 bond_for_each_slave(bond
, slave
, iter
) {
3952 slave_dbg(bond_dev
, slave
->dev
, "s %p c_m %p\n",
3953 slave
, slave
->dev
->netdev_ops
->ndo_change_mtu
);
3955 res
= dev_set_mtu(slave
->dev
, new_mtu
);
3958 /* If we failed to set the slave's mtu to the new value
3959 * we must abort the operation even in ACTIVE_BACKUP
3960 * mode, because if we allow the backup slaves to have
3961 * different mtu values than the active slave we'll
3962 * need to change their mtu when doing a failover. That
3963 * means changing their mtu from timer context, which
3964 * is probably not a good idea.
3966 slave_dbg(bond_dev
, slave
->dev
, "err %d setting mtu to %d\n",
3972 bond_dev
->mtu
= new_mtu
;
3977 /* unwind from head to the slave that failed */
3978 bond_for_each_slave(bond
, rollback_slave
, iter
) {
3981 if (rollback_slave
== slave
)
3984 tmp_res
= dev_set_mtu(rollback_slave
->dev
, bond_dev
->mtu
);
3986 slave_dbg(bond_dev
, rollback_slave
->dev
, "unwind err %d\n",
3993 /* Change HW address
3995 * Note that many devices must be down to change the HW address, and
3996 * downing the master releases all slaves. We can make bonds full of
3997 * bonding devices to test this, however.
3999 static int bond_set_mac_address(struct net_device
*bond_dev
, void *addr
)
4001 struct bonding
*bond
= netdev_priv(bond_dev
);
4002 struct slave
*slave
, *rollback_slave
;
4003 struct sockaddr_storage
*ss
= addr
, tmp_ss
;
4004 struct list_head
*iter
;
4007 if (BOND_MODE(bond
) == BOND_MODE_ALB
)
4008 return bond_alb_set_mac_address(bond_dev
, addr
);
4011 netdev_dbg(bond_dev
, "%s: bond=%p\n", __func__
, bond
);
4013 /* If fail_over_mac is enabled, do nothing and return success.
4014 * Returning an error causes ifenslave to fail.
4016 if (bond
->params
.fail_over_mac
&&
4017 BOND_MODE(bond
) == BOND_MODE_ACTIVEBACKUP
)
4020 if (!is_valid_ether_addr(ss
->__data
))
4021 return -EADDRNOTAVAIL
;
4023 bond_for_each_slave(bond
, slave
, iter
) {
4024 slave_dbg(bond_dev
, slave
->dev
, "%s: slave=%p\n",
4026 res
= dev_set_mac_address(slave
->dev
, addr
, NULL
);
4028 /* TODO: consider downing the slave
4030 * User should expect communications
4031 * breakage anyway until ARP finish
4034 slave_dbg(bond_dev
, slave
->dev
, "%s: err %d\n",
4041 memcpy(bond_dev
->dev_addr
, ss
->__data
, bond_dev
->addr_len
);
4045 memcpy(tmp_ss
.__data
, bond_dev
->dev_addr
, bond_dev
->addr_len
);
4046 tmp_ss
.ss_family
= bond_dev
->type
;
4048 /* unwind from head to the slave that failed */
4049 bond_for_each_slave(bond
, rollback_slave
, iter
) {
4052 if (rollback_slave
== slave
)
4055 tmp_res
= dev_set_mac_address(rollback_slave
->dev
,
4056 (struct sockaddr
*)&tmp_ss
, NULL
);
4058 slave_dbg(bond_dev
, rollback_slave
->dev
, "%s: unwind err %d\n",
4067 * bond_get_slave_by_id - get xmit slave with slave_id
4068 * @bond: bonding device that is transmitting
4069 * @slave_id: slave id up to slave_cnt-1 through which to transmit
4071 * This function tries to get slave with slave_id but in case
4072 * it fails, it tries to find the first available slave for transmission.
4074 static struct slave
*bond_get_slave_by_id(struct bonding
*bond
,
4077 struct list_head
*iter
;
4078 struct slave
*slave
;
4081 /* Here we start from the slave with slave_id */
4082 bond_for_each_slave_rcu(bond
, slave
, iter
) {
4084 if (bond_slave_can_tx(slave
))
4089 /* Here we start from the first slave up to slave_id */
4091 bond_for_each_slave_rcu(bond
, slave
, iter
) {
4094 if (bond_slave_can_tx(slave
))
4097 /* no slave that can tx has been found */
4102 * bond_rr_gen_slave_id - generate slave id based on packets_per_slave
4103 * @bond: bonding device to use
4105 * Based on the value of the bonding device's packets_per_slave parameter
4106 * this function generates a slave id, which is usually used as the next
4107 * slave to transmit through.
4109 static u32
bond_rr_gen_slave_id(struct bonding
*bond
)
4112 struct reciprocal_value reciprocal_packets_per_slave
;
4113 int packets_per_slave
= bond
->params
.packets_per_slave
;
4115 switch (packets_per_slave
) {
4117 slave_id
= prandom_u32();
4120 slave_id
= bond
->rr_tx_counter
;
4123 reciprocal_packets_per_slave
=
4124 bond
->params
.reciprocal_packets_per_slave
;
4125 slave_id
= reciprocal_divide(bond
->rr_tx_counter
,
4126 reciprocal_packets_per_slave
);
4129 bond
->rr_tx_counter
++;
4134 static struct slave
*bond_xmit_roundrobin_slave_get(struct bonding
*bond
,
4135 struct sk_buff
*skb
)
4137 struct slave
*slave
;
4141 /* Start with the curr_active_slave that joined the bond as the
4142 * default for sending IGMP traffic. For failover purposes one
4143 * needs to maintain some consistency for the interface that will
4144 * send the join/membership reports. The curr_active_slave found
4145 * will send all of this type of traffic.
4147 if (skb
->protocol
== htons(ETH_P_IP
)) {
4148 int noff
= skb_network_offset(skb
);
4151 if (unlikely(!pskb_may_pull(skb
, noff
+ sizeof(*iph
))))
4155 if (iph
->protocol
== IPPROTO_IGMP
) {
4156 slave
= rcu_dereference(bond
->curr_active_slave
);
4159 return bond_get_slave_by_id(bond
, 0);
4164 slave_cnt
= READ_ONCE(bond
->slave_cnt
);
4165 if (likely(slave_cnt
)) {
4166 slave_id
= bond_rr_gen_slave_id(bond
) % slave_cnt
;
4167 return bond_get_slave_by_id(bond
, slave_id
);
4172 static netdev_tx_t
bond_xmit_roundrobin(struct sk_buff
*skb
,
4173 struct net_device
*bond_dev
)
4175 struct bonding
*bond
= netdev_priv(bond_dev
);
4176 struct slave
*slave
;
4178 slave
= bond_xmit_roundrobin_slave_get(bond
, skb
);
4180 return bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
4182 return bond_tx_drop(bond_dev
, skb
);
4185 static struct slave
*bond_xmit_activebackup_slave_get(struct bonding
*bond
,
4186 struct sk_buff
*skb
)
4188 return rcu_dereference(bond
->curr_active_slave
);
4191 /* In active-backup mode, we know that bond->curr_active_slave is always valid if
4192 * the bond has a usable interface.
4194 static netdev_tx_t
bond_xmit_activebackup(struct sk_buff
*skb
,
4195 struct net_device
*bond_dev
)
4197 struct bonding
*bond
= netdev_priv(bond_dev
);
4198 struct slave
*slave
;
4200 slave
= bond_xmit_activebackup_slave_get(bond
, skb
);
4202 return bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
4204 return bond_tx_drop(bond_dev
, skb
);
4207 /* Use this to update slave_array when (a) it's not appropriate to update
4208 * slave_array right away (note that update_slave_array() may sleep)
4209 * and / or (b) RTNL is not held.
4211 void bond_slave_arr_work_rearm(struct bonding
*bond
, unsigned long delay
)
4213 queue_delayed_work(bond
->wq
, &bond
->slave_arr_work
, delay
);
4216 /* Slave array work handler. Holds only RTNL */
4217 static void bond_slave_arr_handler(struct work_struct
*work
)
4219 struct bonding
*bond
= container_of(work
, struct bonding
,
4220 slave_arr_work
.work
);
4223 if (!rtnl_trylock())
4226 ret
= bond_update_slave_arr(bond
, NULL
);
4229 pr_warn_ratelimited("Failed to update slave array from WT\n");
4235 bond_slave_arr_work_rearm(bond
, 1);
4238 static void bond_skip_slave(struct bond_up_slave
*slaves
,
4239 struct slave
*skipslave
)
4243 /* Rare situation where caller has asked to skip a specific
4244 * slave but allocation failed (most likely!). BTW this is
4245 * only possible when the call is initiated from
4246 * __bond_release_one(). In this situation; overwrite the
4247 * skipslave entry in the array with the last entry from the
4248 * array to avoid a situation where the xmit path may choose
4249 * this to-be-skipped slave to send a packet out.
4251 for (idx
= 0; slaves
&& idx
< slaves
->count
; idx
++) {
4252 if (skipslave
== slaves
->arr
[idx
]) {
4254 slaves
->arr
[slaves
->count
- 1];
4261 static void bond_set_slave_arr(struct bonding
*bond
,
4262 struct bond_up_slave
*usable_slaves
,
4263 struct bond_up_slave
*all_slaves
)
4265 struct bond_up_slave
*usable
, *all
;
4267 usable
= rtnl_dereference(bond
->usable_slaves
);
4268 rcu_assign_pointer(bond
->usable_slaves
, usable_slaves
);
4269 kfree_rcu(usable
, rcu
);
4271 all
= rtnl_dereference(bond
->all_slaves
);
4272 rcu_assign_pointer(bond
->all_slaves
, all_slaves
);
4273 kfree_rcu(all
, rcu
);
4276 static void bond_reset_slave_arr(struct bonding
*bond
)
4278 struct bond_up_slave
*usable
, *all
;
4280 usable
= rtnl_dereference(bond
->usable_slaves
);
4282 RCU_INIT_POINTER(bond
->usable_slaves
, NULL
);
4283 kfree_rcu(usable
, rcu
);
4286 all
= rtnl_dereference(bond
->all_slaves
);
4288 RCU_INIT_POINTER(bond
->all_slaves
, NULL
);
4289 kfree_rcu(all
, rcu
);
4293 /* Build the usable slaves array in control path for modes that use xmit-hash
4294 * to determine the slave interface -
4295 * (a) BOND_MODE_8023AD
4297 * (c) (BOND_MODE_TLB || BOND_MODE_ALB) && tlb_dynamic_lb == 0
4299 * The caller is expected to hold RTNL only and NO other lock!
4301 int bond_update_slave_arr(struct bonding
*bond
, struct slave
*skipslave
)
4303 struct bond_up_slave
*usable_slaves
= NULL
, *all_slaves
= NULL
;
4304 struct slave
*slave
;
4305 struct list_head
*iter
;
4309 #ifdef CONFIG_LOCKDEP
4310 WARN_ON(lockdep_is_held(&bond
->mode_lock
));
4313 usable_slaves
= kzalloc(struct_size(usable_slaves
, arr
,
4314 bond
->slave_cnt
), GFP_KERNEL
);
4315 all_slaves
= kzalloc(struct_size(all_slaves
, arr
,
4316 bond
->slave_cnt
), GFP_KERNEL
);
4317 if (!usable_slaves
|| !all_slaves
) {
4321 if (BOND_MODE(bond
) == BOND_MODE_8023AD
) {
4322 struct ad_info ad_info
;
4324 if (bond_3ad_get_active_agg_info(bond
, &ad_info
)) {
4325 pr_debug("bond_3ad_get_active_agg_info failed\n");
4326 /* No active aggragator means it's not safe to use
4327 * the previous array.
4329 bond_reset_slave_arr(bond
);
4332 agg_id
= ad_info
.aggregator_id
;
4334 bond_for_each_slave(bond
, slave
, iter
) {
4335 if (skipslave
== slave
)
4338 all_slaves
->arr
[all_slaves
->count
++] = slave
;
4339 if (BOND_MODE(bond
) == BOND_MODE_8023AD
) {
4340 struct aggregator
*agg
;
4342 agg
= SLAVE_AD_INFO(slave
)->port
.aggregator
;
4343 if (!agg
|| agg
->aggregator_identifier
!= agg_id
)
4346 if (!bond_slave_can_tx(slave
))
4349 slave_dbg(bond
->dev
, slave
->dev
, "Adding slave to tx hash array[%d]\n",
4350 usable_slaves
->count
);
4352 usable_slaves
->arr
[usable_slaves
->count
++] = slave
;
4355 bond_set_slave_arr(bond
, usable_slaves
, all_slaves
);
4358 if (ret
!= 0 && skipslave
) {
4359 bond_skip_slave(rtnl_dereference(bond
->all_slaves
),
4361 bond_skip_slave(rtnl_dereference(bond
->usable_slaves
),
4364 kfree_rcu(all_slaves
, rcu
);
4365 kfree_rcu(usable_slaves
, rcu
);
4370 static struct slave
*bond_xmit_3ad_xor_slave_get(struct bonding
*bond
,
4371 struct sk_buff
*skb
,
4372 struct bond_up_slave
*slaves
)
4374 struct slave
*slave
;
4378 hash
= bond_xmit_hash(bond
, skb
);
4379 count
= slaves
? READ_ONCE(slaves
->count
) : 0;
4380 if (unlikely(!count
))
4383 slave
= slaves
->arr
[hash
% count
];
4387 /* Use this Xmit function for 3AD as well as XOR modes. The current
4388 * usable slave array is formed in the control path. The xmit function
4389 * just calculates hash and sends the packet out.
4391 static netdev_tx_t
bond_3ad_xor_xmit(struct sk_buff
*skb
,
4392 struct net_device
*dev
)
4394 struct bonding
*bond
= netdev_priv(dev
);
4395 struct bond_up_slave
*slaves
;
4396 struct slave
*slave
;
4398 slaves
= rcu_dereference(bond
->usable_slaves
);
4399 slave
= bond_xmit_3ad_xor_slave_get(bond
, skb
, slaves
);
4401 return bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
4403 return bond_tx_drop(dev
, skb
);
4406 /* in broadcast mode, we send everything to all usable interfaces. */
4407 static netdev_tx_t
bond_xmit_broadcast(struct sk_buff
*skb
,
4408 struct net_device
*bond_dev
)
4410 struct bonding
*bond
= netdev_priv(bond_dev
);
4411 struct slave
*slave
= NULL
;
4412 struct list_head
*iter
;
4414 bond_for_each_slave_rcu(bond
, slave
, iter
) {
4415 if (bond_is_last_slave(bond
, slave
))
4417 if (bond_slave_is_up(slave
) && slave
->link
== BOND_LINK_UP
) {
4418 struct sk_buff
*skb2
= skb_clone(skb
, GFP_ATOMIC
);
4421 net_err_ratelimited("%s: Error: %s: skb_clone() failed\n",
4422 bond_dev
->name
, __func__
);
4425 bond_dev_queue_xmit(bond
, skb2
, slave
->dev
);
4428 if (slave
&& bond_slave_is_up(slave
) && slave
->link
== BOND_LINK_UP
)
4429 return bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
4431 return bond_tx_drop(bond_dev
, skb
);
4434 /*------------------------- Device initialization ---------------------------*/
4436 /* Lookup the slave that corresponds to a qid */
4437 static inline int bond_slave_override(struct bonding
*bond
,
4438 struct sk_buff
*skb
)
4440 struct slave
*slave
= NULL
;
4441 struct list_head
*iter
;
4443 if (!skb_rx_queue_recorded(skb
))
4446 /* Find out if any slaves have the same mapping as this skb. */
4447 bond_for_each_slave_rcu(bond
, slave
, iter
) {
4448 if (slave
->queue_id
== skb_get_queue_mapping(skb
)) {
4449 if (bond_slave_is_up(slave
) &&
4450 slave
->link
== BOND_LINK_UP
) {
4451 bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
4454 /* If the slave isn't UP, use default transmit policy. */
4463 static u16
bond_select_queue(struct net_device
*dev
, struct sk_buff
*skb
,
4464 struct net_device
*sb_dev
)
4466 /* This helper function exists to help dev_pick_tx get the correct
4467 * destination queue. Using a helper function skips a call to
4468 * skb_tx_hash and will put the skbs in the queue we expect on their
4469 * way down to the bonding driver.
4471 u16 txq
= skb_rx_queue_recorded(skb
) ? skb_get_rx_queue(skb
) : 0;
4473 /* Save the original txq to restore before passing to the driver */
4474 qdisc_skb_cb(skb
)->slave_dev_queue_mapping
= skb_get_queue_mapping(skb
);
4476 if (unlikely(txq
>= dev
->real_num_tx_queues
)) {
4478 txq
-= dev
->real_num_tx_queues
;
4479 } while (txq
>= dev
->real_num_tx_queues
);
4484 static struct net_device
*bond_xmit_get_slave(struct net_device
*master_dev
,
4485 struct sk_buff
*skb
,
4488 struct bonding
*bond
= netdev_priv(master_dev
);
4489 struct bond_up_slave
*slaves
;
4490 struct slave
*slave
= NULL
;
4492 switch (BOND_MODE(bond
)) {
4493 case BOND_MODE_ROUNDROBIN
:
4494 slave
= bond_xmit_roundrobin_slave_get(bond
, skb
);
4496 case BOND_MODE_ACTIVEBACKUP
:
4497 slave
= bond_xmit_activebackup_slave_get(bond
, skb
);
4499 case BOND_MODE_8023AD
:
4502 slaves
= rcu_dereference(bond
->all_slaves
);
4504 slaves
= rcu_dereference(bond
->usable_slaves
);
4505 slave
= bond_xmit_3ad_xor_slave_get(bond
, skb
, slaves
);
4507 case BOND_MODE_BROADCAST
:
4510 slave
= bond_xmit_alb_slave_get(bond
, skb
);
4513 slave
= bond_xmit_tlb_slave_get(bond
, skb
);
4516 /* Should never happen, mode already checked */
4517 WARN_ONCE(true, "Unknown bonding mode");
4526 static netdev_tx_t
__bond_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
4528 struct bonding
*bond
= netdev_priv(dev
);
4530 if (bond_should_override_tx_queue(bond
) &&
4531 !bond_slave_override(bond
, skb
))
4532 return NETDEV_TX_OK
;
4534 switch (BOND_MODE(bond
)) {
4535 case BOND_MODE_ROUNDROBIN
:
4536 return bond_xmit_roundrobin(skb
, dev
);
4537 case BOND_MODE_ACTIVEBACKUP
:
4538 return bond_xmit_activebackup(skb
, dev
);
4539 case BOND_MODE_8023AD
:
4541 return bond_3ad_xor_xmit(skb
, dev
);
4542 case BOND_MODE_BROADCAST
:
4543 return bond_xmit_broadcast(skb
, dev
);
4545 return bond_alb_xmit(skb
, dev
);
4547 return bond_tlb_xmit(skb
, dev
);
4549 /* Should never happen, mode already checked */
4550 netdev_err(dev
, "Unknown bonding mode %d\n", BOND_MODE(bond
));
4552 return bond_tx_drop(dev
, skb
);
4556 static netdev_tx_t
bond_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
4558 struct bonding
*bond
= netdev_priv(dev
);
4559 netdev_tx_t ret
= NETDEV_TX_OK
;
4561 /* If we risk deadlock from transmitting this in the
4562 * netpoll path, tell netpoll to queue the frame for later tx
4564 if (unlikely(is_netpoll_tx_blocked(dev
)))
4565 return NETDEV_TX_BUSY
;
4568 if (bond_has_slaves(bond
))
4569 ret
= __bond_start_xmit(skb
, dev
);
4571 ret
= bond_tx_drop(dev
, skb
);
4577 static u32
bond_mode_bcast_speed(struct slave
*slave
, u32 speed
)
4579 if (speed
== 0 || speed
== SPEED_UNKNOWN
)
4580 speed
= slave
->speed
;
4582 speed
= min(speed
, slave
->speed
);
4587 static int bond_ethtool_get_link_ksettings(struct net_device
*bond_dev
,
4588 struct ethtool_link_ksettings
*cmd
)
4590 struct bonding
*bond
= netdev_priv(bond_dev
);
4591 struct list_head
*iter
;
4592 struct slave
*slave
;
4595 cmd
->base
.duplex
= DUPLEX_UNKNOWN
;
4596 cmd
->base
.port
= PORT_OTHER
;
4598 /* Since bond_slave_can_tx returns false for all inactive or down slaves, we
4599 * do not need to check mode. Though link speed might not represent
4600 * the true receive or transmit bandwidth (not all modes are symmetric)
4601 * this is an accurate maximum.
4603 bond_for_each_slave(bond
, slave
, iter
) {
4604 if (bond_slave_can_tx(slave
)) {
4605 if (slave
->speed
!= SPEED_UNKNOWN
) {
4606 if (BOND_MODE(bond
) == BOND_MODE_BROADCAST
)
4607 speed
= bond_mode_bcast_speed(slave
,
4610 speed
+= slave
->speed
;
4612 if (cmd
->base
.duplex
== DUPLEX_UNKNOWN
&&
4613 slave
->duplex
!= DUPLEX_UNKNOWN
)
4614 cmd
->base
.duplex
= slave
->duplex
;
4617 cmd
->base
.speed
= speed
? : SPEED_UNKNOWN
;
4622 static void bond_ethtool_get_drvinfo(struct net_device
*bond_dev
,
4623 struct ethtool_drvinfo
*drvinfo
)
4625 strlcpy(drvinfo
->driver
, DRV_NAME
, sizeof(drvinfo
->driver
));
4626 snprintf(drvinfo
->fw_version
, sizeof(drvinfo
->fw_version
), "%d",
4630 static const struct ethtool_ops bond_ethtool_ops
= {
4631 .get_drvinfo
= bond_ethtool_get_drvinfo
,
4632 .get_link
= ethtool_op_get_link
,
4633 .get_link_ksettings
= bond_ethtool_get_link_ksettings
,
4636 static const struct net_device_ops bond_netdev_ops
= {
4637 .ndo_init
= bond_init
,
4638 .ndo_uninit
= bond_uninit
,
4639 .ndo_open
= bond_open
,
4640 .ndo_stop
= bond_close
,
4641 .ndo_start_xmit
= bond_start_xmit
,
4642 .ndo_select_queue
= bond_select_queue
,
4643 .ndo_get_stats64
= bond_get_stats
,
4644 .ndo_do_ioctl
= bond_do_ioctl
,
4645 .ndo_change_rx_flags
= bond_change_rx_flags
,
4646 .ndo_set_rx_mode
= bond_set_rx_mode
,
4647 .ndo_change_mtu
= bond_change_mtu
,
4648 .ndo_set_mac_address
= bond_set_mac_address
,
4649 .ndo_neigh_setup
= bond_neigh_setup
,
4650 .ndo_vlan_rx_add_vid
= bond_vlan_rx_add_vid
,
4651 .ndo_vlan_rx_kill_vid
= bond_vlan_rx_kill_vid
,
4652 #ifdef CONFIG_NET_POLL_CONTROLLER
4653 .ndo_netpoll_setup
= bond_netpoll_setup
,
4654 .ndo_netpoll_cleanup
= bond_netpoll_cleanup
,
4655 .ndo_poll_controller
= bond_poll_controller
,
4657 .ndo_add_slave
= bond_enslave
,
4658 .ndo_del_slave
= bond_release
,
4659 .ndo_fix_features
= bond_fix_features
,
4660 .ndo_features_check
= passthru_features_check
,
4661 .ndo_get_xmit_slave
= bond_xmit_get_slave
,
4664 static const struct device_type bond_type
= {
4668 static void bond_destructor(struct net_device
*bond_dev
)
4670 struct bonding
*bond
= netdev_priv(bond_dev
);
4672 destroy_workqueue(bond
->wq
);
4675 void bond_setup(struct net_device
*bond_dev
)
4677 struct bonding
*bond
= netdev_priv(bond_dev
);
4679 spin_lock_init(&bond
->mode_lock
);
4680 bond
->params
= bonding_defaults
;
4682 /* Initialize pointers */
4683 bond
->dev
= bond_dev
;
4685 /* Initialize the device entry points */
4686 ether_setup(bond_dev
);
4687 bond_dev
->max_mtu
= ETH_MAX_MTU
;
4688 bond_dev
->netdev_ops
= &bond_netdev_ops
;
4689 bond_dev
->ethtool_ops
= &bond_ethtool_ops
;
4691 bond_dev
->needs_free_netdev
= true;
4692 bond_dev
->priv_destructor
= bond_destructor
;
4694 SET_NETDEV_DEVTYPE(bond_dev
, &bond_type
);
4696 /* Initialize the device options */
4697 bond_dev
->flags
|= IFF_MASTER
;
4698 bond_dev
->priv_flags
|= IFF_BONDING
| IFF_UNICAST_FLT
| IFF_NO_QUEUE
;
4699 bond_dev
->priv_flags
&= ~(IFF_XMIT_DST_RELEASE
| IFF_TX_SKB_SHARING
);
4701 #ifdef CONFIG_XFRM_OFFLOAD
4702 /* set up xfrm device ops (only supported in active-backup right now) */
4703 bond_dev
->xfrmdev_ops
= &bond_xfrmdev_ops
;
4705 #endif /* CONFIG_XFRM_OFFLOAD */
4707 /* don't acquire bond device's netif_tx_lock when transmitting */
4708 bond_dev
->features
|= NETIF_F_LLTX
;
4710 /* By default, we declare the bond to be fully
4711 * VLAN hardware accelerated capable. Special
4712 * care is taken in the various xmit functions
4713 * when there are slaves that are not hw accel
4717 /* Don't allow bond devices to change network namespaces. */
4718 bond_dev
->features
|= NETIF_F_NETNS_LOCAL
;
4720 bond_dev
->hw_features
= BOND_VLAN_FEATURES
|
4721 NETIF_F_HW_VLAN_CTAG_RX
|
4722 NETIF_F_HW_VLAN_CTAG_FILTER
;
4724 bond_dev
->hw_features
|= NETIF_F_GSO_ENCAP_ALL
| NETIF_F_GSO_UDP_L4
;
4725 #ifdef CONFIG_XFRM_OFFLOAD
4726 bond_dev
->hw_features
|= BOND_XFRM_FEATURES
;
4727 #endif /* CONFIG_XFRM_OFFLOAD */
4728 bond_dev
->features
|= bond_dev
->hw_features
;
4729 bond_dev
->features
|= NETIF_F_HW_VLAN_CTAG_TX
| NETIF_F_HW_VLAN_STAG_TX
;
4730 #ifdef CONFIG_XFRM_OFFLOAD
4731 /* Disable XFRM features if this isn't an active-backup config */
4732 if (BOND_MODE(bond
) != BOND_MODE_ACTIVEBACKUP
)
4733 bond_dev
->features
&= ~BOND_XFRM_FEATURES
;
4734 #endif /* CONFIG_XFRM_OFFLOAD */
4737 /* Destroy a bonding device.
4738 * Must be under rtnl_lock when this function is called.
4740 static void bond_uninit(struct net_device
*bond_dev
)
4742 struct bonding
*bond
= netdev_priv(bond_dev
);
4743 struct bond_up_slave
*usable
, *all
;
4744 struct list_head
*iter
;
4745 struct slave
*slave
;
4747 bond_netpoll_cleanup(bond_dev
);
4749 /* Release the bonded slaves */
4750 bond_for_each_slave(bond
, slave
, iter
)
4751 __bond_release_one(bond_dev
, slave
->dev
, true, true);
4752 netdev_info(bond_dev
, "Released all slaves\n");
4754 usable
= rtnl_dereference(bond
->usable_slaves
);
4756 RCU_INIT_POINTER(bond
->usable_slaves
, NULL
);
4757 kfree_rcu(usable
, rcu
);
4760 all
= rtnl_dereference(bond
->all_slaves
);
4762 RCU_INIT_POINTER(bond
->all_slaves
, NULL
);
4763 kfree_rcu(all
, rcu
);
4766 list_del(&bond
->bond_list
);
4768 bond_debug_unregister(bond
);
4771 /*------------------------- Module initialization ---------------------------*/
4773 static int bond_check_params(struct bond_params
*params
)
4775 int arp_validate_value
, fail_over_mac_value
, primary_reselect_value
, i
;
4776 struct bond_opt_value newval
;
4777 const struct bond_opt_value
*valptr
;
4778 int arp_all_targets_value
= 0;
4779 u16 ad_actor_sys_prio
= 0;
4780 u16 ad_user_port_key
= 0;
4781 __be32 arp_target
[BOND_MAX_ARP_TARGETS
] = { 0 };
4783 int bond_mode
= BOND_MODE_ROUNDROBIN
;
4784 int xmit_hashtype
= BOND_XMIT_POLICY_LAYER2
;
4788 /* Convert string parameters. */
4790 bond_opt_initstr(&newval
, mode
);
4791 valptr
= bond_opt_parse(bond_opt_get(BOND_OPT_MODE
), &newval
);
4793 pr_err("Error: Invalid bonding mode \"%s\"\n", mode
);
4796 bond_mode
= valptr
->value
;
4799 if (xmit_hash_policy
) {
4800 if (bond_mode
== BOND_MODE_ROUNDROBIN
||
4801 bond_mode
== BOND_MODE_ACTIVEBACKUP
||
4802 bond_mode
== BOND_MODE_BROADCAST
) {
4803 pr_info("xmit_hash_policy param is irrelevant in mode %s\n",
4804 bond_mode_name(bond_mode
));
4806 bond_opt_initstr(&newval
, xmit_hash_policy
);
4807 valptr
= bond_opt_parse(bond_opt_get(BOND_OPT_XMIT_HASH
),
4810 pr_err("Error: Invalid xmit_hash_policy \"%s\"\n",
4814 xmit_hashtype
= valptr
->value
;
4819 if (bond_mode
!= BOND_MODE_8023AD
) {
4820 pr_info("lacp_rate param is irrelevant in mode %s\n",
4821 bond_mode_name(bond_mode
));
4823 bond_opt_initstr(&newval
, lacp_rate
);
4824 valptr
= bond_opt_parse(bond_opt_get(BOND_OPT_LACP_RATE
),
4827 pr_err("Error: Invalid lacp rate \"%s\"\n",
4831 lacp_fast
= valptr
->value
;
4836 bond_opt_initstr(&newval
, ad_select
);
4837 valptr
= bond_opt_parse(bond_opt_get(BOND_OPT_AD_SELECT
),
4840 pr_err("Error: Invalid ad_select \"%s\"\n", ad_select
);
4843 params
->ad_select
= valptr
->value
;
4844 if (bond_mode
!= BOND_MODE_8023AD
)
4845 pr_warn("ad_select param only affects 802.3ad mode\n");
4847 params
->ad_select
= BOND_AD_STABLE
;
4850 if (max_bonds
< 0) {
4851 pr_warn("Warning: max_bonds (%d) not in range %d-%d, so it was reset to BOND_DEFAULT_MAX_BONDS (%d)\n",
4852 max_bonds
, 0, INT_MAX
, BOND_DEFAULT_MAX_BONDS
);
4853 max_bonds
= BOND_DEFAULT_MAX_BONDS
;
4857 pr_warn("Warning: miimon module parameter (%d), not in range 0-%d, so it was reset to 0\n",
4863 pr_warn("Warning: updelay module parameter (%d), not in range 0-%d, so it was reset to 0\n",
4868 if (downdelay
< 0) {
4869 pr_warn("Warning: downdelay module parameter (%d), not in range 0-%d, so it was reset to 0\n",
4870 downdelay
, INT_MAX
);
4874 if ((use_carrier
!= 0) && (use_carrier
!= 1)) {
4875 pr_warn("Warning: use_carrier module parameter (%d), not of valid value (0/1), so it was set to 1\n",
4880 if (num_peer_notif
< 0 || num_peer_notif
> 255) {
4881 pr_warn("Warning: num_grat_arp/num_unsol_na (%d) not in range 0-255 so it was reset to 1\n",
4886 /* reset values for 802.3ad/TLB/ALB */
4887 if (!bond_mode_uses_arp(bond_mode
)) {
4889 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");
4890 pr_warn("Forcing miimon to 100msec\n");
4891 miimon
= BOND_DEFAULT_MIIMON
;
4895 if (tx_queues
< 1 || tx_queues
> 255) {
4896 pr_warn("Warning: tx_queues (%d) should be between 1 and 255, resetting to %d\n",
4897 tx_queues
, BOND_DEFAULT_TX_QUEUES
);
4898 tx_queues
= BOND_DEFAULT_TX_QUEUES
;
4901 if ((all_slaves_active
!= 0) && (all_slaves_active
!= 1)) {
4902 pr_warn("Warning: all_slaves_active module parameter (%d), not of valid value (0/1), so it was set to 0\n",
4904 all_slaves_active
= 0;
4907 if (resend_igmp
< 0 || resend_igmp
> 255) {
4908 pr_warn("Warning: resend_igmp (%d) should be between 0 and 255, resetting to %d\n",
4909 resend_igmp
, BOND_DEFAULT_RESEND_IGMP
);
4910 resend_igmp
= BOND_DEFAULT_RESEND_IGMP
;
4913 bond_opt_initval(&newval
, packets_per_slave
);
4914 if (!bond_opt_parse(bond_opt_get(BOND_OPT_PACKETS_PER_SLAVE
), &newval
)) {
4915 pr_warn("Warning: packets_per_slave (%d) should be between 0 and %u resetting to 1\n",
4916 packets_per_slave
, USHRT_MAX
);
4917 packets_per_slave
= 1;
4920 if (bond_mode
== BOND_MODE_ALB
) {
4921 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",
4926 if (updelay
|| downdelay
) {
4927 /* just warn the user the up/down delay will have
4928 * no effect since miimon is zero...
4930 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",
4931 updelay
, downdelay
);
4934 /* don't allow arp monitoring */
4936 pr_warn("Warning: miimon (%d) and arp_interval (%d) can't be used simultaneously, disabling ARP monitoring\n",
4937 miimon
, arp_interval
);
4941 if ((updelay
% miimon
) != 0) {
4942 pr_warn("Warning: updelay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
4943 updelay
, miimon
, (updelay
/ miimon
) * miimon
);
4948 if ((downdelay
% miimon
) != 0) {
4949 pr_warn("Warning: downdelay (%d) is not a multiple of miimon (%d), downdelay rounded to %d ms\n",
4951 (downdelay
/ miimon
) * miimon
);
4954 downdelay
/= miimon
;
4957 if (arp_interval
< 0) {
4958 pr_warn("Warning: arp_interval module parameter (%d), not in range 0-%d, so it was reset to 0\n",
4959 arp_interval
, INT_MAX
);
4963 for (arp_ip_count
= 0, i
= 0;
4964 (arp_ip_count
< BOND_MAX_ARP_TARGETS
) && arp_ip_target
[i
]; i
++) {
4967 /* not a complete check, but good enough to catch mistakes */
4968 if (!in4_pton(arp_ip_target
[i
], -1, (u8
*)&ip
, -1, NULL
) ||
4969 !bond_is_ip_target_ok(ip
)) {
4970 pr_warn("Warning: bad arp_ip_target module parameter (%s), ARP monitoring will not be performed\n",
4974 if (bond_get_targets_ip(arp_target
, ip
) == -1)
4975 arp_target
[arp_ip_count
++] = ip
;
4977 pr_warn("Warning: duplicate address %pI4 in arp_ip_target, skipping\n",
4982 if (arp_interval
&& !arp_ip_count
) {
4983 /* don't allow arping if no arp_ip_target given... */
4984 pr_warn("Warning: arp_interval module parameter (%d) specified without providing an arp_ip_target parameter, arp_interval was reset to 0\n",
4990 if (!arp_interval
) {
4991 pr_err("arp_validate requires arp_interval\n");
4995 bond_opt_initstr(&newval
, arp_validate
);
4996 valptr
= bond_opt_parse(bond_opt_get(BOND_OPT_ARP_VALIDATE
),
4999 pr_err("Error: invalid arp_validate \"%s\"\n",
5003 arp_validate_value
= valptr
->value
;
5005 arp_validate_value
= 0;
5008 if (arp_all_targets
) {
5009 bond_opt_initstr(&newval
, arp_all_targets
);
5010 valptr
= bond_opt_parse(bond_opt_get(BOND_OPT_ARP_ALL_TARGETS
),
5013 pr_err("Error: invalid arp_all_targets_value \"%s\"\n",
5015 arp_all_targets_value
= 0;
5017 arp_all_targets_value
= valptr
->value
;
5022 pr_info("MII link monitoring set to %d ms\n", miimon
);
5023 } else if (arp_interval
) {
5024 valptr
= bond_opt_get_val(BOND_OPT_ARP_VALIDATE
,
5025 arp_validate_value
);
5026 pr_info("ARP monitoring set to %d ms, validate %s, with %d target(s):",
5027 arp_interval
, valptr
->string
, arp_ip_count
);
5029 for (i
= 0; i
< arp_ip_count
; i
++)
5030 pr_cont(" %s", arp_ip_target
[i
]);
5034 } else if (max_bonds
) {
5035 /* miimon and arp_interval not set, we need one so things
5036 * work as expected, see bonding.txt for details
5038 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");
5041 if (primary
&& !bond_mode_uses_primary(bond_mode
)) {
5042 /* currently, using a primary only makes sense
5043 * in active backup, TLB or ALB modes
5045 pr_warn("Warning: %s primary device specified but has no effect in %s mode\n",
5046 primary
, bond_mode_name(bond_mode
));
5050 if (primary
&& primary_reselect
) {
5051 bond_opt_initstr(&newval
, primary_reselect
);
5052 valptr
= bond_opt_parse(bond_opt_get(BOND_OPT_PRIMARY_RESELECT
),
5055 pr_err("Error: Invalid primary_reselect \"%s\"\n",
5059 primary_reselect_value
= valptr
->value
;
5061 primary_reselect_value
= BOND_PRI_RESELECT_ALWAYS
;
5064 if (fail_over_mac
) {
5065 bond_opt_initstr(&newval
, fail_over_mac
);
5066 valptr
= bond_opt_parse(bond_opt_get(BOND_OPT_FAIL_OVER_MAC
),
5069 pr_err("Error: invalid fail_over_mac \"%s\"\n",
5073 fail_over_mac_value
= valptr
->value
;
5074 if (bond_mode
!= BOND_MODE_ACTIVEBACKUP
)
5075 pr_warn("Warning: fail_over_mac only affects active-backup mode\n");
5077 fail_over_mac_value
= BOND_FOM_NONE
;
5080 bond_opt_initstr(&newval
, "default");
5081 valptr
= bond_opt_parse(
5082 bond_opt_get(BOND_OPT_AD_ACTOR_SYS_PRIO
),
5085 pr_err("Error: No ad_actor_sys_prio default value");
5088 ad_actor_sys_prio
= valptr
->value
;
5090 valptr
= bond_opt_parse(bond_opt_get(BOND_OPT_AD_USER_PORT_KEY
),
5093 pr_err("Error: No ad_user_port_key default value");
5096 ad_user_port_key
= valptr
->value
;
5098 bond_opt_initstr(&newval
, "default");
5099 valptr
= bond_opt_parse(bond_opt_get(BOND_OPT_TLB_DYNAMIC_LB
), &newval
);
5101 pr_err("Error: No tlb_dynamic_lb default value");
5104 tlb_dynamic_lb
= valptr
->value
;
5106 if (lp_interval
== 0) {
5107 pr_warn("Warning: ip_interval must be between 1 and %d, so it was reset to %d\n",
5108 INT_MAX
, BOND_ALB_DEFAULT_LP_INTERVAL
);
5109 lp_interval
= BOND_ALB_DEFAULT_LP_INTERVAL
;
5112 /* fill params struct with the proper values */
5113 params
->mode
= bond_mode
;
5114 params
->xmit_policy
= xmit_hashtype
;
5115 params
->miimon
= miimon
;
5116 params
->num_peer_notif
= num_peer_notif
;
5117 params
->arp_interval
= arp_interval
;
5118 params
->arp_validate
= arp_validate_value
;
5119 params
->arp_all_targets
= arp_all_targets_value
;
5120 params
->updelay
= updelay
;
5121 params
->downdelay
= downdelay
;
5122 params
->peer_notif_delay
= 0;
5123 params
->use_carrier
= use_carrier
;
5124 params
->lacp_fast
= lacp_fast
;
5125 params
->primary
[0] = 0;
5126 params
->primary_reselect
= primary_reselect_value
;
5127 params
->fail_over_mac
= fail_over_mac_value
;
5128 params
->tx_queues
= tx_queues
;
5129 params
->all_slaves_active
= all_slaves_active
;
5130 params
->resend_igmp
= resend_igmp
;
5131 params
->min_links
= min_links
;
5132 params
->lp_interval
= lp_interval
;
5133 params
->packets_per_slave
= packets_per_slave
;
5134 params
->tlb_dynamic_lb
= tlb_dynamic_lb
;
5135 params
->ad_actor_sys_prio
= ad_actor_sys_prio
;
5136 eth_zero_addr(params
->ad_actor_system
);
5137 params
->ad_user_port_key
= ad_user_port_key
;
5138 if (packets_per_slave
> 0) {
5139 params
->reciprocal_packets_per_slave
=
5140 reciprocal_value(packets_per_slave
);
5142 /* reciprocal_packets_per_slave is unused if
5143 * packets_per_slave is 0 or 1, just initialize it
5145 params
->reciprocal_packets_per_slave
=
5146 (struct reciprocal_value
) { 0 };
5150 strncpy(params
->primary
, primary
, IFNAMSIZ
);
5151 params
->primary
[IFNAMSIZ
- 1] = 0;
5154 memcpy(params
->arp_targets
, arp_target
, sizeof(arp_target
));
5159 /* Called from registration process */
5160 static int bond_init(struct net_device
*bond_dev
)
5162 struct bonding
*bond
= netdev_priv(bond_dev
);
5163 struct bond_net
*bn
= net_generic(dev_net(bond_dev
), bond_net_id
);
5165 netdev_dbg(bond_dev
, "Begin bond_init\n");
5167 bond
->wq
= alloc_ordered_workqueue(bond_dev
->name
, WQ_MEM_RECLAIM
);
5171 spin_lock_init(&bond
->stats_lock
);
5172 netdev_lockdep_set_classes(bond_dev
);
5174 list_add_tail(&bond
->bond_list
, &bn
->dev_list
);
5176 bond_prepare_sysfs_group(bond
);
5178 bond_debug_register(bond
);
5180 /* Ensure valid dev_addr */
5181 if (is_zero_ether_addr(bond_dev
->dev_addr
) &&
5182 bond_dev
->addr_assign_type
== NET_ADDR_PERM
)
5183 eth_hw_addr_random(bond_dev
);
5188 unsigned int bond_get_num_tx_queues(void)
5193 /* Create a new bond based on the specified name and bonding parameters.
5194 * If name is NULL, obtain a suitable "bond%d" name for us.
5195 * Caller must NOT hold rtnl_lock; we need to release it here before we
5196 * set up our sysfs entries.
5198 int bond_create(struct net
*net
, const char *name
)
5200 struct net_device
*bond_dev
;
5201 struct bonding
*bond
;
5202 struct alb_bond_info
*bond_info
;
5207 bond_dev
= alloc_netdev_mq(sizeof(struct bonding
),
5208 name
? name
: "bond%d", NET_NAME_UNKNOWN
,
5209 bond_setup
, tx_queues
);
5211 pr_err("%s: eek! can't alloc netdev!\n", name
);
5217 * Initialize rx_hashtbl_used_head to RLB_NULL_INDEX.
5218 * It is set to 0 by default which is wrong.
5220 bond
= netdev_priv(bond_dev
);
5221 bond_info
= &(BOND_ALB_INFO(bond
));
5222 bond_info
->rx_hashtbl_used_head
= RLB_NULL_INDEX
;
5224 dev_net_set(bond_dev
, net
);
5225 bond_dev
->rtnl_link_ops
= &bond_link_ops
;
5227 res
= register_netdevice(bond_dev
);
5229 free_netdev(bond_dev
);
5235 netif_carrier_off(bond_dev
);
5237 bond_work_init_all(bond
);
5243 static int __net_init
bond_net_init(struct net
*net
)
5245 struct bond_net
*bn
= net_generic(net
, bond_net_id
);
5248 INIT_LIST_HEAD(&bn
->dev_list
);
5250 bond_create_proc_dir(bn
);
5251 bond_create_sysfs(bn
);
5256 static void __net_exit
bond_net_exit(struct net
*net
)
5258 struct bond_net
*bn
= net_generic(net
, bond_net_id
);
5259 struct bonding
*bond
, *tmp_bond
;
5262 bond_destroy_sysfs(bn
);
5264 /* Kill off any bonds created after unregistering bond rtnl ops */
5266 list_for_each_entry_safe(bond
, tmp_bond
, &bn
->dev_list
, bond_list
)
5267 unregister_netdevice_queue(bond
->dev
, &list
);
5268 unregister_netdevice_many(&list
);
5271 bond_destroy_proc_dir(bn
);
5274 static struct pernet_operations bond_net_ops
= {
5275 .init
= bond_net_init
,
5276 .exit
= bond_net_exit
,
5278 .size
= sizeof(struct bond_net
),
5281 static int __init
bonding_init(void)
5286 res
= bond_check_params(&bonding_defaults
);
5290 res
= register_pernet_subsys(&bond_net_ops
);
5294 res
= bond_netlink_init();
5298 bond_create_debugfs();
5300 for (i
= 0; i
< max_bonds
; i
++) {
5301 res
= bond_create(&init_net
, NULL
);
5306 skb_flow_dissector_init(&flow_keys_bonding
,
5307 flow_keys_bonding_keys
,
5308 ARRAY_SIZE(flow_keys_bonding_keys
));
5310 register_netdevice_notifier(&bond_netdev_notifier
);
5314 bond_destroy_debugfs();
5315 bond_netlink_fini();
5317 unregister_pernet_subsys(&bond_net_ops
);
5322 static void __exit
bonding_exit(void)
5324 unregister_netdevice_notifier(&bond_netdev_notifier
);
5326 bond_destroy_debugfs();
5328 bond_netlink_fini();
5329 unregister_pernet_subsys(&bond_net_ops
);
5331 #ifdef CONFIG_NET_POLL_CONTROLLER
5332 /* Make sure we don't have an imbalance on our netpoll blocking */
5333 WARN_ON(atomic_read(&netpoll_block_tx
));
5337 module_init(bonding_init
);
5338 module_exit(bonding_exit
);
5339 MODULE_LICENSE("GPL");
5340 MODULE_DESCRIPTION(DRV_DESCRIPTION
);
5341 MODULE_AUTHOR("Thomas Davis, tadavis@lbl.gov and many others");