1 // SPDX-License-Identifier: GPL-1.0+
3 * originally based on the dummy device.
5 * Copyright 1999, Thomas Davis, tadavis@lbl.gov.
6 * Based on dummy.c, and eql.c devices.
8 * bonding.c: an Ethernet Bonding driver
10 * This is useful to talk to a Cisco EtherChannel compatible equipment:
12 * Sun Trunking (Solaris)
13 * Alteon AceDirector Trunks
15 * and probably many L2 switches ...
18 * ifconfig bond0 ipaddress netmask up
19 * will setup a network device, with an ip address. No mac address
20 * will be assigned at this time. The hw mac address will come from
21 * the first slave bonded to the channel. All slaves will then use
22 * this hw mac address.
25 * will release all slaves, marking them as down.
27 * ifenslave bond0 eth0
28 * will attach eth0 to bond0 as a slave. eth0 hw mac address will either
29 * a: be used as initial mac address
30 * b: if a hw mac address already is there, eth0's hw mac address
31 * will then be set from bond0.
35 #include <linux/kernel.h>
36 #include <linux/module.h>
37 #include <linux/types.h>
38 #include <linux/fcntl.h>
39 #include <linux/filter.h>
40 #include <linux/interrupt.h>
41 #include <linux/ptrace.h>
42 #include <linux/ioport.h>
46 #include <linux/icmp.h>
47 #include <linux/icmpv6.h>
48 #include <linux/tcp.h>
49 #include <linux/udp.h>
50 #include <linux/slab.h>
51 #include <linux/string.h>
52 #include <linux/init.h>
53 #include <linux/timer.h>
54 #include <linux/socket.h>
55 #include <linux/ctype.h>
56 #include <linux/inet.h>
57 #include <linux/bitops.h>
60 #include <linux/uaccess.h>
61 #include <linux/errno.h>
62 #include <linux/netdevice.h>
63 #include <linux/inetdevice.h>
64 #include <linux/igmp.h>
65 #include <linux/etherdevice.h>
66 #include <linux/skbuff.h>
68 #include <linux/rtnetlink.h>
69 #include <linux/smp.h>
70 #include <linux/if_ether.h>
72 #include <linux/mii.h>
73 #include <linux/ethtool.h>
74 #include <linux/if_vlan.h>
75 #include <linux/if_bonding.h>
76 #include <linux/phy.h>
77 #include <linux/jiffies.h>
78 #include <linux/preempt.h>
79 #include <net/route.h>
80 #include <net/net_namespace.h>
81 #include <net/netns/generic.h>
82 #include <net/pkt_sched.h>
83 #include <linux/rculist.h>
84 #include <net/flow_dissector.h>
86 #include <net/bonding.h>
87 #include <net/bond_3ad.h>
88 #include <net/bond_alb.h>
89 #if IS_ENABLED(CONFIG_TLS_DEVICE)
92 #include <net/ip6_route.h>
95 #include "bonding_priv.h"
97 /*---------------------------- Module parameters ----------------------------*/
99 /* monitor all links that often (in milliseconds). <=0 disables monitoring */
101 static int max_bonds
= BOND_DEFAULT_MAX_BONDS
;
102 static int tx_queues
= BOND_DEFAULT_TX_QUEUES
;
103 static int num_peer_notif
= 1;
106 static int downdelay
;
107 static int use_carrier
= 1;
109 static char *primary
;
110 static char *primary_reselect
;
111 static char *lacp_rate
;
112 static int min_links
;
113 static char *ad_select
;
114 static char *xmit_hash_policy
;
115 static int arp_interval
;
116 static char *arp_ip_target
[BOND_MAX_ARP_TARGETS
];
117 static char *arp_validate
;
118 static char *arp_all_targets
;
119 static char *fail_over_mac
;
120 static int all_slaves_active
;
121 static struct bond_params bonding_defaults
;
122 static int resend_igmp
= BOND_DEFAULT_RESEND_IGMP
;
123 static int packets_per_slave
= 1;
124 static int lp_interval
= BOND_ALB_DEFAULT_LP_INTERVAL
;
126 module_param(max_bonds
, int, 0);
127 MODULE_PARM_DESC(max_bonds
, "Max number of bonded devices");
128 module_param(tx_queues
, int, 0);
129 MODULE_PARM_DESC(tx_queues
, "Max number of transmit queues (default = 16)");
130 module_param_named(num_grat_arp
, num_peer_notif
, int, 0644);
131 MODULE_PARM_DESC(num_grat_arp
, "Number of peer notifications to send on "
132 "failover event (alias of num_unsol_na)");
133 module_param_named(num_unsol_na
, num_peer_notif
, int, 0644);
134 MODULE_PARM_DESC(num_unsol_na
, "Number of peer notifications to send on "
135 "failover event (alias of num_grat_arp)");
136 module_param(miimon
, int, 0);
137 MODULE_PARM_DESC(miimon
, "Link check interval in milliseconds");
138 module_param(updelay
, int, 0);
139 MODULE_PARM_DESC(updelay
, "Delay before considering link up, in milliseconds");
140 module_param(downdelay
, int, 0);
141 MODULE_PARM_DESC(downdelay
, "Delay before considering link down, "
143 module_param(use_carrier
, int, 0);
144 MODULE_PARM_DESC(use_carrier
, "Use netif_carrier_ok (vs MII ioctls) in miimon; "
145 "0 for off, 1 for on (default)");
146 module_param(mode
, charp
, 0);
147 MODULE_PARM_DESC(mode
, "Mode of operation; 0 for balance-rr, "
148 "1 for active-backup, 2 for balance-xor, "
149 "3 for broadcast, 4 for 802.3ad, 5 for balance-tlb, "
150 "6 for balance-alb");
151 module_param(primary
, charp
, 0);
152 MODULE_PARM_DESC(primary
, "Primary network device to use");
153 module_param(primary_reselect
, charp
, 0);
154 MODULE_PARM_DESC(primary_reselect
, "Reselect primary slave "
156 "0 for always (default), "
157 "1 for only if speed of primary is "
159 "2 for only on active slave "
161 module_param(lacp_rate
, charp
, 0);
162 MODULE_PARM_DESC(lacp_rate
, "LACPDU tx rate to request from 802.3ad partner; "
163 "0 for slow, 1 for fast");
164 module_param(ad_select
, charp
, 0);
165 MODULE_PARM_DESC(ad_select
, "802.3ad aggregation selection logic; "
166 "0 for stable (default), 1 for bandwidth, "
168 module_param(min_links
, int, 0);
169 MODULE_PARM_DESC(min_links
, "Minimum number of available links before turning on carrier");
171 module_param(xmit_hash_policy
, charp
, 0);
172 MODULE_PARM_DESC(xmit_hash_policy
, "balance-alb, balance-tlb, balance-xor, 802.3ad hashing method; "
173 "0 for layer 2 (default), 1 for layer 3+4, "
174 "2 for layer 2+3, 3 for encap layer 2+3, "
175 "4 for encap layer 3+4, 5 for vlan+srcmac");
176 module_param(arp_interval
, int, 0);
177 MODULE_PARM_DESC(arp_interval
, "arp interval in milliseconds");
178 module_param_array(arp_ip_target
, charp
, NULL
, 0);
179 MODULE_PARM_DESC(arp_ip_target
, "arp targets in n.n.n.n form");
180 module_param(arp_validate
, charp
, 0);
181 MODULE_PARM_DESC(arp_validate
, "validate src/dst of ARP probes; "
182 "0 for none (default), 1 for active, "
183 "2 for backup, 3 for all");
184 module_param(arp_all_targets
, charp
, 0);
185 MODULE_PARM_DESC(arp_all_targets
, "fail on any/all arp targets timeout; 0 for any (default), 1 for all");
186 module_param(fail_over_mac
, charp
, 0);
187 MODULE_PARM_DESC(fail_over_mac
, "For active-backup, do not set all slaves to "
188 "the same MAC; 0 for none (default), "
189 "1 for active, 2 for follow");
190 module_param(all_slaves_active
, int, 0);
191 MODULE_PARM_DESC(all_slaves_active
, "Keep all frames received on an interface "
192 "by setting active flag for all slaves; "
193 "0 for never (default), 1 for always.");
194 module_param(resend_igmp
, int, 0);
195 MODULE_PARM_DESC(resend_igmp
, "Number of IGMP membership reports to send on "
197 module_param(packets_per_slave
, int, 0);
198 MODULE_PARM_DESC(packets_per_slave
, "Packets to send per slave in balance-rr "
199 "mode; 0 for a random slave, 1 packet per "
200 "slave (default), >1 packets per slave.");
201 module_param(lp_interval
, uint
, 0);
202 MODULE_PARM_DESC(lp_interval
, "The number of seconds between instances where "
203 "the bonding driver sends learning packets to "
204 "each slaves peer switch. The default is 1.");
206 /*----------------------------- Global variables ----------------------------*/
208 #ifdef CONFIG_NET_POLL_CONTROLLER
209 atomic_t netpoll_block_tx
= ATOMIC_INIT(0);
212 unsigned int bond_net_id __read_mostly
;
214 static const struct flow_dissector_key flow_keys_bonding_keys
[] = {
216 .key_id
= FLOW_DISSECTOR_KEY_CONTROL
,
217 .offset
= offsetof(struct flow_keys
, control
),
220 .key_id
= FLOW_DISSECTOR_KEY_BASIC
,
221 .offset
= offsetof(struct flow_keys
, basic
),
224 .key_id
= FLOW_DISSECTOR_KEY_IPV4_ADDRS
,
225 .offset
= offsetof(struct flow_keys
, addrs
.v4addrs
),
228 .key_id
= FLOW_DISSECTOR_KEY_IPV6_ADDRS
,
229 .offset
= offsetof(struct flow_keys
, addrs
.v6addrs
),
232 .key_id
= FLOW_DISSECTOR_KEY_TIPC
,
233 .offset
= offsetof(struct flow_keys
, addrs
.tipckey
),
236 .key_id
= FLOW_DISSECTOR_KEY_PORTS
,
237 .offset
= offsetof(struct flow_keys
, ports
),
240 .key_id
= FLOW_DISSECTOR_KEY_ICMP
,
241 .offset
= offsetof(struct flow_keys
, icmp
),
244 .key_id
= FLOW_DISSECTOR_KEY_VLAN
,
245 .offset
= offsetof(struct flow_keys
, vlan
),
248 .key_id
= FLOW_DISSECTOR_KEY_FLOW_LABEL
,
249 .offset
= offsetof(struct flow_keys
, tags
),
252 .key_id
= FLOW_DISSECTOR_KEY_GRE_KEYID
,
253 .offset
= offsetof(struct flow_keys
, keyid
),
257 static struct flow_dissector flow_keys_bonding __read_mostly
;
259 /*-------------------------- Forward declarations ---------------------------*/
261 static int bond_init(struct net_device
*bond_dev
);
262 static void bond_uninit(struct net_device
*bond_dev
);
263 static void bond_get_stats(struct net_device
*bond_dev
,
264 struct rtnl_link_stats64
*stats
);
265 static void bond_slave_arr_handler(struct work_struct
*work
);
266 static bool bond_time_in_interval(struct bonding
*bond
, unsigned long last_act
,
268 static void bond_netdev_notify_work(struct work_struct
*work
);
270 /*---------------------------- General routines -----------------------------*/
272 const char *bond_mode_name(int mode
)
274 static const char *names
[] = {
275 [BOND_MODE_ROUNDROBIN
] = "load balancing (round-robin)",
276 [BOND_MODE_ACTIVEBACKUP
] = "fault-tolerance (active-backup)",
277 [BOND_MODE_XOR
] = "load balancing (xor)",
278 [BOND_MODE_BROADCAST
] = "fault-tolerance (broadcast)",
279 [BOND_MODE_8023AD
] = "IEEE 802.3ad Dynamic link aggregation",
280 [BOND_MODE_TLB
] = "transmit load balancing",
281 [BOND_MODE_ALB
] = "adaptive load balancing",
284 if (mode
< BOND_MODE_ROUNDROBIN
|| mode
> BOND_MODE_ALB
)
291 * bond_dev_queue_xmit - Prepare skb for xmit.
293 * @bond: bond device that got this skb for tx.
294 * @skb: hw accel VLAN tagged skb to transmit
295 * @slave_dev: slave that is supposed to xmit this skbuff
297 netdev_tx_t
bond_dev_queue_xmit(struct bonding
*bond
, struct sk_buff
*skb
,
298 struct net_device
*slave_dev
)
300 skb
->dev
= slave_dev
;
302 BUILD_BUG_ON(sizeof(skb
->queue_mapping
) !=
303 sizeof(qdisc_skb_cb(skb
)->slave_dev_queue_mapping
));
304 skb_set_queue_mapping(skb
, qdisc_skb_cb(skb
)->slave_dev_queue_mapping
);
306 if (unlikely(netpoll_tx_running(bond
->dev
)))
307 return bond_netpoll_send_skb(bond_get_slave_by_dev(bond
, slave_dev
), skb
);
309 return dev_queue_xmit(skb
);
312 static bool bond_sk_check(struct bonding
*bond
)
314 switch (BOND_MODE(bond
)) {
315 case BOND_MODE_8023AD
:
317 if (bond
->params
.xmit_policy
== BOND_XMIT_POLICY_LAYER34
)
325 static bool bond_xdp_check(struct bonding
*bond
)
327 switch (BOND_MODE(bond
)) {
328 case BOND_MODE_ROUNDROBIN
:
329 case BOND_MODE_ACTIVEBACKUP
:
331 case BOND_MODE_8023AD
:
333 /* vlan+srcmac is not supported with XDP as in most cases the 802.1q
334 * payload is not in the packet due to hardware offload.
336 if (bond
->params
.xmit_policy
!= BOND_XMIT_POLICY_VLAN_SRCMAC
)
344 /*---------------------------------- VLAN -----------------------------------*/
346 /* In the following 2 functions, bond_vlan_rx_add_vid and bond_vlan_rx_kill_vid,
347 * We don't protect the slave list iteration with a lock because:
348 * a. This operation is performed in IOCTL context,
349 * b. The operation is protected by the RTNL semaphore in the 8021q code,
350 * c. Holding a lock with BH disabled while directly calling a base driver
351 * entry point is generally a BAD idea.
353 * The design of synchronization/protection for this operation in the 8021q
354 * module is good for one or more VLAN devices over a single physical device
355 * and cannot be extended for a teaming solution like bonding, so there is a
356 * potential race condition here where a net device from the vlan group might
357 * be referenced (either by a base driver or the 8021q code) while it is being
358 * removed from the system. However, it turns out we're not making matters
359 * worse, and if it works for regular VLAN usage it will work here too.
363 * bond_vlan_rx_add_vid - Propagates adding an id to slaves
364 * @bond_dev: bonding net device that got called
365 * @proto: network protocol ID
366 * @vid: vlan id being added
368 static int bond_vlan_rx_add_vid(struct net_device
*bond_dev
,
369 __be16 proto
, u16 vid
)
371 struct bonding
*bond
= netdev_priv(bond_dev
);
372 struct slave
*slave
, *rollback_slave
;
373 struct list_head
*iter
;
376 bond_for_each_slave(bond
, slave
, iter
) {
377 res
= vlan_vid_add(slave
->dev
, proto
, vid
);
385 /* unwind to the slave that failed */
386 bond_for_each_slave(bond
, rollback_slave
, iter
) {
387 if (rollback_slave
== slave
)
390 vlan_vid_del(rollback_slave
->dev
, proto
, vid
);
397 * bond_vlan_rx_kill_vid - Propagates deleting an id to slaves
398 * @bond_dev: bonding net device that got called
399 * @proto: network protocol ID
400 * @vid: vlan id being removed
402 static int bond_vlan_rx_kill_vid(struct net_device
*bond_dev
,
403 __be16 proto
, u16 vid
)
405 struct bonding
*bond
= netdev_priv(bond_dev
);
406 struct list_head
*iter
;
409 bond_for_each_slave(bond
, slave
, iter
)
410 vlan_vid_del(slave
->dev
, proto
, vid
);
412 if (bond_is_lb(bond
))
413 bond_alb_clear_vlan(bond
, vid
);
418 /*---------------------------------- XFRM -----------------------------------*/
420 #ifdef CONFIG_XFRM_OFFLOAD
422 * bond_ipsec_add_sa - program device with a security association
423 * @xs: pointer to transformer state struct
424 * @extack: extack point to fill failure reason
426 static int bond_ipsec_add_sa(struct xfrm_state
*xs
,
427 struct netlink_ext_ack
*extack
)
429 struct net_device
*bond_dev
= xs
->xso
.dev
;
430 struct bond_ipsec
*ipsec
;
431 struct bonding
*bond
;
439 bond
= netdev_priv(bond_dev
);
440 slave
= rcu_dereference(bond
->curr_active_slave
);
446 if (!slave
->dev
->xfrmdev_ops
||
447 !slave
->dev
->xfrmdev_ops
->xdo_dev_state_add
||
448 netif_is_bond_master(slave
->dev
)) {
449 NL_SET_ERR_MSG_MOD(extack
, "Slave does not support ipsec offload");
454 ipsec
= kmalloc(sizeof(*ipsec
), GFP_ATOMIC
);
459 xs
->xso
.real_dev
= slave
->dev
;
461 err
= slave
->dev
->xfrmdev_ops
->xdo_dev_state_add(xs
, extack
);
464 INIT_LIST_HEAD(&ipsec
->list
);
465 spin_lock_bh(&bond
->ipsec_lock
);
466 list_add(&ipsec
->list
, &bond
->ipsec_list
);
467 spin_unlock_bh(&bond
->ipsec_lock
);
475 static void bond_ipsec_add_sa_all(struct bonding
*bond
)
477 struct net_device
*bond_dev
= bond
->dev
;
478 struct bond_ipsec
*ipsec
;
482 slave
= rcu_dereference(bond
->curr_active_slave
);
486 if (!slave
->dev
->xfrmdev_ops
||
487 !slave
->dev
->xfrmdev_ops
->xdo_dev_state_add
||
488 netif_is_bond_master(slave
->dev
)) {
489 spin_lock_bh(&bond
->ipsec_lock
);
490 if (!list_empty(&bond
->ipsec_list
))
491 slave_warn(bond_dev
, slave
->dev
,
492 "%s: no slave xdo_dev_state_add\n",
494 spin_unlock_bh(&bond
->ipsec_lock
);
498 spin_lock_bh(&bond
->ipsec_lock
);
499 list_for_each_entry(ipsec
, &bond
->ipsec_list
, list
) {
500 ipsec
->xs
->xso
.real_dev
= slave
->dev
;
501 if (slave
->dev
->xfrmdev_ops
->xdo_dev_state_add(ipsec
->xs
, NULL
)) {
502 slave_warn(bond_dev
, slave
->dev
, "%s: failed to add SA\n", __func__
);
503 ipsec
->xs
->xso
.real_dev
= NULL
;
506 spin_unlock_bh(&bond
->ipsec_lock
);
512 * bond_ipsec_del_sa - clear out this specific SA
513 * @xs: pointer to transformer state struct
515 static void bond_ipsec_del_sa(struct xfrm_state
*xs
)
517 struct net_device
*bond_dev
= xs
->xso
.dev
;
518 struct bond_ipsec
*ipsec
;
519 struct bonding
*bond
;
526 bond
= netdev_priv(bond_dev
);
527 slave
= rcu_dereference(bond
->curr_active_slave
);
532 if (!xs
->xso
.real_dev
)
535 WARN_ON(xs
->xso
.real_dev
!= slave
->dev
);
537 if (!slave
->dev
->xfrmdev_ops
||
538 !slave
->dev
->xfrmdev_ops
->xdo_dev_state_delete
||
539 netif_is_bond_master(slave
->dev
)) {
540 slave_warn(bond_dev
, slave
->dev
, "%s: no slave xdo_dev_state_delete\n", __func__
);
544 slave
->dev
->xfrmdev_ops
->xdo_dev_state_delete(xs
);
546 spin_lock_bh(&bond
->ipsec_lock
);
547 list_for_each_entry(ipsec
, &bond
->ipsec_list
, list
) {
548 if (ipsec
->xs
== xs
) {
549 list_del(&ipsec
->list
);
554 spin_unlock_bh(&bond
->ipsec_lock
);
558 static void bond_ipsec_del_sa_all(struct bonding
*bond
)
560 struct net_device
*bond_dev
= bond
->dev
;
561 struct bond_ipsec
*ipsec
;
565 slave
= rcu_dereference(bond
->curr_active_slave
);
571 spin_lock_bh(&bond
->ipsec_lock
);
572 list_for_each_entry(ipsec
, &bond
->ipsec_list
, list
) {
573 if (!ipsec
->xs
->xso
.real_dev
)
576 if (!slave
->dev
->xfrmdev_ops
||
577 !slave
->dev
->xfrmdev_ops
->xdo_dev_state_delete
||
578 netif_is_bond_master(slave
->dev
)) {
579 slave_warn(bond_dev
, slave
->dev
,
580 "%s: no slave xdo_dev_state_delete\n",
583 slave
->dev
->xfrmdev_ops
->xdo_dev_state_delete(ipsec
->xs
);
585 ipsec
->xs
->xso
.real_dev
= NULL
;
587 spin_unlock_bh(&bond
->ipsec_lock
);
592 * bond_ipsec_offload_ok - can this packet use the xfrm hw offload
593 * @skb: current data packet
594 * @xs: pointer to transformer state struct
596 static bool bond_ipsec_offload_ok(struct sk_buff
*skb
, struct xfrm_state
*xs
)
598 struct net_device
*bond_dev
= xs
->xso
.dev
;
599 struct net_device
*real_dev
;
600 struct slave
*curr_active
;
601 struct bonding
*bond
;
604 bond
= netdev_priv(bond_dev
);
606 curr_active
= rcu_dereference(bond
->curr_active_slave
);
607 real_dev
= curr_active
->dev
;
609 if (BOND_MODE(bond
) != BOND_MODE_ACTIVEBACKUP
) {
614 if (!xs
->xso
.real_dev
) {
619 if (!real_dev
->xfrmdev_ops
||
620 !real_dev
->xfrmdev_ops
->xdo_dev_offload_ok
||
621 netif_is_bond_master(real_dev
)) {
626 err
= real_dev
->xfrmdev_ops
->xdo_dev_offload_ok(skb
, xs
);
632 static const struct xfrmdev_ops bond_xfrmdev_ops
= {
633 .xdo_dev_state_add
= bond_ipsec_add_sa
,
634 .xdo_dev_state_delete
= bond_ipsec_del_sa
,
635 .xdo_dev_offload_ok
= bond_ipsec_offload_ok
,
637 #endif /* CONFIG_XFRM_OFFLOAD */
639 /*------------------------------- Link status -------------------------------*/
641 /* Set the carrier state for the master according to the state of its
642 * slaves. If any slaves are up, the master is up. In 802.3ad mode,
643 * do special 802.3ad magic.
645 * Returns zero if carrier state does not change, nonzero if it does.
647 int bond_set_carrier(struct bonding
*bond
)
649 struct list_head
*iter
;
652 if (!bond_has_slaves(bond
))
655 if (BOND_MODE(bond
) == BOND_MODE_8023AD
)
656 return bond_3ad_set_carrier(bond
);
658 bond_for_each_slave(bond
, slave
, iter
) {
659 if (slave
->link
== BOND_LINK_UP
) {
660 if (!netif_carrier_ok(bond
->dev
)) {
661 netif_carrier_on(bond
->dev
);
669 if (netif_carrier_ok(bond
->dev
)) {
670 netif_carrier_off(bond
->dev
);
676 /* Get link speed and duplex from the slave's base driver
677 * using ethtool. If for some reason the call fails or the
678 * values are invalid, set speed and duplex to -1,
679 * and return. Return 1 if speed or duplex settings are
680 * UNKNOWN; 0 otherwise.
682 static int bond_update_speed_duplex(struct slave
*slave
)
684 struct net_device
*slave_dev
= slave
->dev
;
685 struct ethtool_link_ksettings ecmd
;
688 slave
->speed
= SPEED_UNKNOWN
;
689 slave
->duplex
= DUPLEX_UNKNOWN
;
691 res
= __ethtool_get_link_ksettings(slave_dev
, &ecmd
);
694 if (ecmd
.base
.speed
== 0 || ecmd
.base
.speed
== ((__u32
)-1))
696 switch (ecmd
.base
.duplex
) {
704 slave
->speed
= ecmd
.base
.speed
;
705 slave
->duplex
= ecmd
.base
.duplex
;
710 const char *bond_slave_link_status(s8 link
)
726 /* if <dev> supports MII link status reporting, check its link status.
728 * We either do MII/ETHTOOL ioctls, or check netif_carrier_ok(),
729 * depending upon the setting of the use_carrier parameter.
731 * Return either BMSR_LSTATUS, meaning that the link is up (or we
732 * can't tell and just pretend it is), or 0, meaning that the link is
735 * If reporting is non-zero, instead of faking link up, return -1 if
736 * both ETHTOOL and MII ioctls fail (meaning the device does not
737 * support them). If use_carrier is set, return whatever it says.
738 * It'd be nice if there was a good way to tell if a driver supports
739 * netif_carrier, but there really isn't.
741 static int bond_check_dev_link(struct bonding
*bond
,
742 struct net_device
*slave_dev
, int reporting
)
744 const struct net_device_ops
*slave_ops
= slave_dev
->netdev_ops
;
745 int (*ioctl
)(struct net_device
*, struct ifreq
*, int);
747 struct mii_ioctl_data
*mii
;
749 if (!reporting
&& !netif_running(slave_dev
))
752 if (bond
->params
.use_carrier
)
753 return netif_carrier_ok(slave_dev
) ? BMSR_LSTATUS
: 0;
755 /* Try to get link status using Ethtool first. */
756 if (slave_dev
->ethtool_ops
->get_link
)
757 return slave_dev
->ethtool_ops
->get_link(slave_dev
) ?
760 /* Ethtool can't be used, fallback to MII ioctls. */
761 ioctl
= slave_ops
->ndo_eth_ioctl
;
763 /* TODO: set pointer to correct ioctl on a per team member
764 * bases to make this more efficient. that is, once
765 * we determine the correct ioctl, we will always
766 * call it and not the others for that team
770 /* We cannot assume that SIOCGMIIPHY will also read a
771 * register; not all network drivers (e.g., e100)
775 /* Yes, the mii is overlaid on the ifreq.ifr_ifru */
776 strscpy_pad(ifr
.ifr_name
, slave_dev
->name
, IFNAMSIZ
);
778 if (ioctl(slave_dev
, &ifr
, SIOCGMIIPHY
) == 0) {
779 mii
->reg_num
= MII_BMSR
;
780 if (ioctl(slave_dev
, &ifr
, SIOCGMIIREG
) == 0)
781 return mii
->val_out
& BMSR_LSTATUS
;
785 /* If reporting, report that either there's no ndo_eth_ioctl,
786 * or both SIOCGMIIREG and get_link failed (meaning that we
787 * cannot report link status). If not reporting, pretend
790 return reporting
? -1 : BMSR_LSTATUS
;
793 /*----------------------------- Multicast list ------------------------------*/
795 /* Push the promiscuity flag down to appropriate slaves */
796 static int bond_set_promiscuity(struct bonding
*bond
, int inc
)
798 struct list_head
*iter
;
801 if (bond_uses_primary(bond
)) {
802 struct slave
*curr_active
= rtnl_dereference(bond
->curr_active_slave
);
805 err
= dev_set_promiscuity(curr_active
->dev
, inc
);
809 bond_for_each_slave(bond
, slave
, iter
) {
810 err
= dev_set_promiscuity(slave
->dev
, inc
);
818 /* Push the allmulti flag down to all slaves */
819 static int bond_set_allmulti(struct bonding
*bond
, int inc
)
821 struct list_head
*iter
;
824 if (bond_uses_primary(bond
)) {
825 struct slave
*curr_active
= rtnl_dereference(bond
->curr_active_slave
);
828 err
= dev_set_allmulti(curr_active
->dev
, inc
);
832 bond_for_each_slave(bond
, slave
, iter
) {
833 err
= dev_set_allmulti(slave
->dev
, inc
);
841 /* Retrieve the list of registered multicast addresses for the bonding
842 * device and retransmit an IGMP JOIN request to the current active
845 static void bond_resend_igmp_join_requests_delayed(struct work_struct
*work
)
847 struct bonding
*bond
= container_of(work
, struct bonding
,
850 if (!rtnl_trylock()) {
851 queue_delayed_work(bond
->wq
, &bond
->mcast_work
, 1);
854 call_netdevice_notifiers(NETDEV_RESEND_IGMP
, bond
->dev
);
856 if (bond
->igmp_retrans
> 1) {
857 bond
->igmp_retrans
--;
858 queue_delayed_work(bond
->wq
, &bond
->mcast_work
, HZ
/5);
863 /* Flush bond's hardware addresses from slave */
864 static void bond_hw_addr_flush(struct net_device
*bond_dev
,
865 struct net_device
*slave_dev
)
867 struct bonding
*bond
= netdev_priv(bond_dev
);
869 dev_uc_unsync(slave_dev
, bond_dev
);
870 dev_mc_unsync(slave_dev
, bond_dev
);
872 if (BOND_MODE(bond
) == BOND_MODE_8023AD
)
873 dev_mc_del(slave_dev
, lacpdu_mcast_addr
);
876 /*--------------------------- Active slave change ---------------------------*/
878 /* Update the hardware address list and promisc/allmulti for the new and
879 * old active slaves (if any). Modes that are not using primary keep all
880 * slaves up date at all times; only the modes that use primary need to call
881 * this function to swap these settings during a failover.
883 static void bond_hw_addr_swap(struct bonding
*bond
, struct slave
*new_active
,
884 struct slave
*old_active
)
887 if (bond
->dev
->flags
& IFF_PROMISC
)
888 dev_set_promiscuity(old_active
->dev
, -1);
890 if (bond
->dev
->flags
& IFF_ALLMULTI
)
891 dev_set_allmulti(old_active
->dev
, -1);
893 if (bond
->dev
->flags
& IFF_UP
)
894 bond_hw_addr_flush(bond
->dev
, old_active
->dev
);
898 /* FIXME: Signal errors upstream. */
899 if (bond
->dev
->flags
& IFF_PROMISC
)
900 dev_set_promiscuity(new_active
->dev
, 1);
902 if (bond
->dev
->flags
& IFF_ALLMULTI
)
903 dev_set_allmulti(new_active
->dev
, 1);
905 if (bond
->dev
->flags
& IFF_UP
) {
906 netif_addr_lock_bh(bond
->dev
);
907 dev_uc_sync(new_active
->dev
, bond
->dev
);
908 dev_mc_sync(new_active
->dev
, bond
->dev
);
909 netif_addr_unlock_bh(bond
->dev
);
915 * bond_set_dev_addr - clone slave's address to bond
916 * @bond_dev: bond net device
917 * @slave_dev: slave net device
919 * Should be called with RTNL held.
921 static int bond_set_dev_addr(struct net_device
*bond_dev
,
922 struct net_device
*slave_dev
)
926 slave_dbg(bond_dev
, slave_dev
, "bond_dev=%p slave_dev=%p slave_dev->addr_len=%d\n",
927 bond_dev
, slave_dev
, slave_dev
->addr_len
);
928 err
= dev_pre_changeaddr_notify(bond_dev
, slave_dev
->dev_addr
, NULL
);
932 __dev_addr_set(bond_dev
, slave_dev
->dev_addr
, slave_dev
->addr_len
);
933 bond_dev
->addr_assign_type
= NET_ADDR_STOLEN
;
934 call_netdevice_notifiers(NETDEV_CHANGEADDR
, bond_dev
);
938 static struct slave
*bond_get_old_active(struct bonding
*bond
,
939 struct slave
*new_active
)
942 struct list_head
*iter
;
944 bond_for_each_slave(bond
, slave
, iter
) {
945 if (slave
== new_active
)
948 if (ether_addr_equal(bond
->dev
->dev_addr
, slave
->dev
->dev_addr
))
955 /* bond_do_fail_over_mac
957 * Perform special MAC address swapping for fail_over_mac settings
961 static void bond_do_fail_over_mac(struct bonding
*bond
,
962 struct slave
*new_active
,
963 struct slave
*old_active
)
965 u8 tmp_mac
[MAX_ADDR_LEN
];
966 struct sockaddr_storage ss
;
969 switch (bond
->params
.fail_over_mac
) {
970 case BOND_FOM_ACTIVE
:
972 rv
= bond_set_dev_addr(bond
->dev
, new_active
->dev
);
974 slave_err(bond
->dev
, new_active
->dev
, "Error %d setting bond MAC from slave\n",
978 case BOND_FOM_FOLLOW
:
979 /* if new_active && old_active, swap them
980 * if just old_active, do nothing (going to no active slave)
981 * if just new_active, set new_active to bond's MAC
987 old_active
= bond_get_old_active(bond
, new_active
);
990 bond_hw_addr_copy(tmp_mac
, new_active
->dev
->dev_addr
,
991 new_active
->dev
->addr_len
);
992 bond_hw_addr_copy(ss
.__data
,
993 old_active
->dev
->dev_addr
,
994 old_active
->dev
->addr_len
);
995 ss
.ss_family
= new_active
->dev
->type
;
997 bond_hw_addr_copy(ss
.__data
, bond
->dev
->dev_addr
,
998 bond
->dev
->addr_len
);
999 ss
.ss_family
= bond
->dev
->type
;
1002 rv
= dev_set_mac_address(new_active
->dev
,
1003 (struct sockaddr
*)&ss
, NULL
);
1005 slave_err(bond
->dev
, new_active
->dev
, "Error %d setting MAC of new active slave\n",
1013 bond_hw_addr_copy(ss
.__data
, tmp_mac
,
1014 new_active
->dev
->addr_len
);
1015 ss
.ss_family
= old_active
->dev
->type
;
1017 rv
= dev_set_mac_address(old_active
->dev
,
1018 (struct sockaddr
*)&ss
, NULL
);
1020 slave_err(bond
->dev
, old_active
->dev
, "Error %d setting MAC of old active slave\n",
1025 netdev_err(bond
->dev
, "bond_do_fail_over_mac impossible: bad policy %d\n",
1026 bond
->params
.fail_over_mac
);
1033 * bond_choose_primary_or_current - select the primary or high priority slave
1034 * @bond: our bonding struct
1036 * - Check if there is a primary link. If the primary link was set and is up,
1037 * go on and do link reselection.
1039 * - If primary link is not set or down, find the highest priority link.
1040 * If the highest priority link is not current slave, set it as primary
1041 * link and do link reselection.
1043 static struct slave
*bond_choose_primary_or_current(struct bonding
*bond
)
1045 struct slave
*prim
= rtnl_dereference(bond
->primary_slave
);
1046 struct slave
*curr
= rtnl_dereference(bond
->curr_active_slave
);
1047 struct slave
*slave
, *hprio
= NULL
;
1048 struct list_head
*iter
;
1050 if (!prim
|| prim
->link
!= BOND_LINK_UP
) {
1051 bond_for_each_slave(bond
, slave
, iter
) {
1052 if (slave
->link
== BOND_LINK_UP
) {
1053 hprio
= hprio
?: slave
;
1054 if (slave
->prio
> hprio
->prio
)
1059 if (hprio
&& hprio
!= curr
) {
1064 if (!curr
|| curr
->link
!= BOND_LINK_UP
)
1069 if (bond
->force_primary
) {
1070 bond
->force_primary
= false;
1075 if (!curr
|| curr
->link
!= BOND_LINK_UP
)
1078 /* At this point, prim and curr are both up */
1079 switch (bond
->params
.primary_reselect
) {
1080 case BOND_PRI_RESELECT_ALWAYS
:
1082 case BOND_PRI_RESELECT_BETTER
:
1083 if (prim
->speed
< curr
->speed
)
1085 if (prim
->speed
== curr
->speed
&& prim
->duplex
<= curr
->duplex
)
1088 case BOND_PRI_RESELECT_FAILURE
:
1091 netdev_err(bond
->dev
, "impossible primary_reselect %d\n",
1092 bond
->params
.primary_reselect
);
1098 * bond_find_best_slave - select the best available slave to be the active one
1099 * @bond: our bonding struct
1101 static struct slave
*bond_find_best_slave(struct bonding
*bond
)
1103 struct slave
*slave
, *bestslave
= NULL
;
1104 struct list_head
*iter
;
1105 int mintime
= bond
->params
.updelay
;
1107 slave
= bond_choose_primary_or_current(bond
);
1111 bond_for_each_slave(bond
, slave
, iter
) {
1112 if (slave
->link
== BOND_LINK_UP
)
1114 if (slave
->link
== BOND_LINK_BACK
&& bond_slave_is_up(slave
) &&
1115 slave
->delay
< mintime
) {
1116 mintime
= slave
->delay
;
1124 static bool bond_should_notify_peers(struct bonding
*bond
)
1126 struct slave
*slave
;
1129 slave
= rcu_dereference(bond
->curr_active_slave
);
1132 if (!slave
|| !bond
->send_peer_notif
||
1133 bond
->send_peer_notif
%
1134 max(1, bond
->params
.peer_notif_delay
) != 0 ||
1135 !netif_carrier_ok(bond
->dev
) ||
1136 test_bit(__LINK_STATE_LINKWATCH_PENDING
, &slave
->dev
->state
))
1139 netdev_dbg(bond
->dev
, "bond_should_notify_peers: slave %s\n",
1140 slave
? slave
->dev
->name
: "NULL");
1146 * bond_change_active_slave - change the active slave into the specified one
1147 * @bond: our bonding struct
1148 * @new_active: the new slave to make the active one
1150 * Set the new slave to the bond's settings and unset them on the old
1151 * curr_active_slave.
1152 * Setting include flags, mc-list, promiscuity, allmulti, etc.
1154 * If @new's link state is %BOND_LINK_BACK we'll set it to %BOND_LINK_UP,
1155 * because it is apparently the best available slave we have, even though its
1156 * updelay hasn't timed out yet.
1158 * Caller must hold RTNL.
1160 void bond_change_active_slave(struct bonding
*bond
, struct slave
*new_active
)
1162 struct slave
*old_active
;
1166 old_active
= rtnl_dereference(bond
->curr_active_slave
);
1168 if (old_active
== new_active
)
1171 #ifdef CONFIG_XFRM_OFFLOAD
1172 bond_ipsec_del_sa_all(bond
);
1173 #endif /* CONFIG_XFRM_OFFLOAD */
1176 new_active
->last_link_up
= jiffies
;
1178 if (new_active
->link
== BOND_LINK_BACK
) {
1179 if (bond_uses_primary(bond
)) {
1180 slave_info(bond
->dev
, new_active
->dev
, "making interface the new active one %d ms earlier\n",
1181 (bond
->params
.updelay
- new_active
->delay
) * bond
->params
.miimon
);
1184 new_active
->delay
= 0;
1185 bond_set_slave_link_state(new_active
, BOND_LINK_UP
,
1186 BOND_SLAVE_NOTIFY_NOW
);
1188 if (BOND_MODE(bond
) == BOND_MODE_8023AD
)
1189 bond_3ad_handle_link_change(new_active
, BOND_LINK_UP
);
1191 if (bond_is_lb(bond
))
1192 bond_alb_handle_link_change(bond
, new_active
, BOND_LINK_UP
);
1194 if (bond_uses_primary(bond
))
1195 slave_info(bond
->dev
, new_active
->dev
, "making interface the new active one\n");
1199 if (bond_uses_primary(bond
))
1200 bond_hw_addr_swap(bond
, new_active
, old_active
);
1202 if (bond_is_lb(bond
)) {
1203 bond_alb_handle_active_change(bond
, new_active
);
1205 bond_set_slave_inactive_flags(old_active
,
1206 BOND_SLAVE_NOTIFY_NOW
);
1208 bond_set_slave_active_flags(new_active
,
1209 BOND_SLAVE_NOTIFY_NOW
);
1211 rcu_assign_pointer(bond
->curr_active_slave
, new_active
);
1214 if (BOND_MODE(bond
) == BOND_MODE_ACTIVEBACKUP
) {
1216 bond_set_slave_inactive_flags(old_active
,
1217 BOND_SLAVE_NOTIFY_NOW
);
1220 bool should_notify_peers
= false;
1222 bond_set_slave_active_flags(new_active
,
1223 BOND_SLAVE_NOTIFY_NOW
);
1225 if (bond
->params
.fail_over_mac
)
1226 bond_do_fail_over_mac(bond
, new_active
,
1229 if (netif_running(bond
->dev
)) {
1230 bond
->send_peer_notif
=
1231 bond
->params
.num_peer_notif
*
1232 max(1, bond
->params
.peer_notif_delay
);
1233 should_notify_peers
=
1234 bond_should_notify_peers(bond
);
1237 call_netdevice_notifiers(NETDEV_BONDING_FAILOVER
, bond
->dev
);
1238 if (should_notify_peers
) {
1239 bond
->send_peer_notif
--;
1240 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS
,
1246 #ifdef CONFIG_XFRM_OFFLOAD
1247 bond_ipsec_add_sa_all(bond
);
1248 #endif /* CONFIG_XFRM_OFFLOAD */
1250 /* resend IGMP joins since active slave has changed or
1251 * all were sent on curr_active_slave.
1252 * resend only if bond is brought up with the affected
1253 * bonding modes and the retransmission is enabled
1255 if (netif_running(bond
->dev
) && (bond
->params
.resend_igmp
> 0) &&
1256 ((bond_uses_primary(bond
) && new_active
) ||
1257 BOND_MODE(bond
) == BOND_MODE_ROUNDROBIN
)) {
1258 bond
->igmp_retrans
= bond
->params
.resend_igmp
;
1259 queue_delayed_work(bond
->wq
, &bond
->mcast_work
, 1);
1264 * bond_select_active_slave - select a new active slave, if needed
1265 * @bond: our bonding struct
1267 * This functions should be called when one of the following occurs:
1268 * - The old curr_active_slave has been released or lost its link.
1269 * - The primary_slave has got its link back.
1270 * - A slave has got its link back and there's no old curr_active_slave.
1272 * Caller must hold RTNL.
1274 void bond_select_active_slave(struct bonding
*bond
)
1276 struct slave
*best_slave
;
1281 best_slave
= bond_find_best_slave(bond
);
1282 if (best_slave
!= rtnl_dereference(bond
->curr_active_slave
)) {
1283 bond_change_active_slave(bond
, best_slave
);
1284 rv
= bond_set_carrier(bond
);
1288 if (netif_carrier_ok(bond
->dev
))
1289 netdev_info(bond
->dev
, "active interface up!\n");
1291 netdev_info(bond
->dev
, "now running without any active interface!\n");
1295 #ifdef CONFIG_NET_POLL_CONTROLLER
1296 static inline int slave_enable_netpoll(struct slave
*slave
)
1301 np
= kzalloc(sizeof(*np
), GFP_KERNEL
);
1306 err
= __netpoll_setup(np
, slave
->dev
);
1315 static inline void slave_disable_netpoll(struct slave
*slave
)
1317 struct netpoll
*np
= slave
->np
;
1327 static void bond_poll_controller(struct net_device
*bond_dev
)
1329 struct bonding
*bond
= netdev_priv(bond_dev
);
1330 struct slave
*slave
= NULL
;
1331 struct list_head
*iter
;
1332 struct ad_info ad_info
;
1334 if (BOND_MODE(bond
) == BOND_MODE_8023AD
)
1335 if (bond_3ad_get_active_agg_info(bond
, &ad_info
))
1338 bond_for_each_slave_rcu(bond
, slave
, iter
) {
1339 if (!bond_slave_is_up(slave
))
1342 if (BOND_MODE(bond
) == BOND_MODE_8023AD
) {
1343 struct aggregator
*agg
=
1344 SLAVE_AD_INFO(slave
)->port
.aggregator
;
1347 agg
->aggregator_identifier
!= ad_info
.aggregator_id
)
1351 netpoll_poll_dev(slave
->dev
);
1355 static void bond_netpoll_cleanup(struct net_device
*bond_dev
)
1357 struct bonding
*bond
= netdev_priv(bond_dev
);
1358 struct list_head
*iter
;
1359 struct slave
*slave
;
1361 bond_for_each_slave(bond
, slave
, iter
)
1362 if (bond_slave_is_up(slave
))
1363 slave_disable_netpoll(slave
);
1366 static int bond_netpoll_setup(struct net_device
*dev
, struct netpoll_info
*ni
)
1368 struct bonding
*bond
= netdev_priv(dev
);
1369 struct list_head
*iter
;
1370 struct slave
*slave
;
1373 bond_for_each_slave(bond
, slave
, iter
) {
1374 err
= slave_enable_netpoll(slave
);
1376 bond_netpoll_cleanup(dev
);
1383 static inline int slave_enable_netpoll(struct slave
*slave
)
1387 static inline void slave_disable_netpoll(struct slave
*slave
)
1390 static void bond_netpoll_cleanup(struct net_device
*bond_dev
)
1395 /*---------------------------------- IOCTL ----------------------------------*/
1397 static netdev_features_t
bond_fix_features(struct net_device
*dev
,
1398 netdev_features_t features
)
1400 struct bonding
*bond
= netdev_priv(dev
);
1401 struct list_head
*iter
;
1402 netdev_features_t mask
;
1403 struct slave
*slave
;
1407 features
&= ~NETIF_F_ONE_FOR_ALL
;
1408 features
|= NETIF_F_ALL_FOR_ALL
;
1410 bond_for_each_slave(bond
, slave
, iter
) {
1411 features
= netdev_increment_features(features
,
1412 slave
->dev
->features
,
1415 features
= netdev_add_tso_features(features
, mask
);
1420 #define BOND_VLAN_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \
1421 NETIF_F_FRAGLIST | NETIF_F_GSO_SOFTWARE | \
1422 NETIF_F_HIGHDMA | NETIF_F_LRO)
1424 #define BOND_ENC_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \
1425 NETIF_F_RXCSUM | NETIF_F_GSO_SOFTWARE)
1427 #define BOND_MPLS_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \
1428 NETIF_F_GSO_SOFTWARE)
1431 static void bond_compute_features(struct bonding
*bond
)
1433 unsigned int dst_release_flag
= IFF_XMIT_DST_RELEASE
|
1434 IFF_XMIT_DST_RELEASE_PERM
;
1435 netdev_features_t vlan_features
= BOND_VLAN_FEATURES
;
1436 netdev_features_t enc_features
= BOND_ENC_FEATURES
;
1437 #ifdef CONFIG_XFRM_OFFLOAD
1438 netdev_features_t xfrm_features
= BOND_XFRM_FEATURES
;
1439 #endif /* CONFIG_XFRM_OFFLOAD */
1440 netdev_features_t mpls_features
= BOND_MPLS_FEATURES
;
1441 struct net_device
*bond_dev
= bond
->dev
;
1442 struct list_head
*iter
;
1443 struct slave
*slave
;
1444 unsigned short max_hard_header_len
= ETH_HLEN
;
1445 unsigned int tso_max_size
= TSO_MAX_SIZE
;
1446 u16 tso_max_segs
= TSO_MAX_SEGS
;
1448 if (!bond_has_slaves(bond
))
1450 vlan_features
&= NETIF_F_ALL_FOR_ALL
;
1451 mpls_features
&= NETIF_F_ALL_FOR_ALL
;
1453 bond_for_each_slave(bond
, slave
, iter
) {
1454 vlan_features
= netdev_increment_features(vlan_features
,
1455 slave
->dev
->vlan_features
, BOND_VLAN_FEATURES
);
1457 enc_features
= netdev_increment_features(enc_features
,
1458 slave
->dev
->hw_enc_features
,
1461 #ifdef CONFIG_XFRM_OFFLOAD
1462 xfrm_features
= netdev_increment_features(xfrm_features
,
1463 slave
->dev
->hw_enc_features
,
1464 BOND_XFRM_FEATURES
);
1465 #endif /* CONFIG_XFRM_OFFLOAD */
1467 mpls_features
= netdev_increment_features(mpls_features
,
1468 slave
->dev
->mpls_features
,
1469 BOND_MPLS_FEATURES
);
1471 dst_release_flag
&= slave
->dev
->priv_flags
;
1472 if (slave
->dev
->hard_header_len
> max_hard_header_len
)
1473 max_hard_header_len
= slave
->dev
->hard_header_len
;
1475 tso_max_size
= min(tso_max_size
, slave
->dev
->tso_max_size
);
1476 tso_max_segs
= min(tso_max_segs
, slave
->dev
->tso_max_segs
);
1478 bond_dev
->hard_header_len
= max_hard_header_len
;
1481 bond_dev
->vlan_features
= vlan_features
;
1482 bond_dev
->hw_enc_features
= enc_features
| NETIF_F_GSO_ENCAP_ALL
|
1483 NETIF_F_HW_VLAN_CTAG_TX
|
1484 NETIF_F_HW_VLAN_STAG_TX
;
1485 #ifdef CONFIG_XFRM_OFFLOAD
1486 bond_dev
->hw_enc_features
|= xfrm_features
;
1487 #endif /* CONFIG_XFRM_OFFLOAD */
1488 bond_dev
->mpls_features
= mpls_features
;
1489 netif_set_tso_max_segs(bond_dev
, tso_max_segs
);
1490 netif_set_tso_max_size(bond_dev
, tso_max_size
);
1492 bond_dev
->priv_flags
&= ~IFF_XMIT_DST_RELEASE
;
1493 if ((bond_dev
->priv_flags
& IFF_XMIT_DST_RELEASE_PERM
) &&
1494 dst_release_flag
== (IFF_XMIT_DST_RELEASE
| IFF_XMIT_DST_RELEASE_PERM
))
1495 bond_dev
->priv_flags
|= IFF_XMIT_DST_RELEASE
;
1497 netdev_change_features(bond_dev
);
1500 static void bond_setup_by_slave(struct net_device
*bond_dev
,
1501 struct net_device
*slave_dev
)
1503 bond_dev
->header_ops
= slave_dev
->header_ops
;
1505 bond_dev
->type
= slave_dev
->type
;
1506 bond_dev
->hard_header_len
= slave_dev
->hard_header_len
;
1507 bond_dev
->needed_headroom
= slave_dev
->needed_headroom
;
1508 bond_dev
->addr_len
= slave_dev
->addr_len
;
1510 memcpy(bond_dev
->broadcast
, slave_dev
->broadcast
,
1511 slave_dev
->addr_len
);
1513 if (slave_dev
->flags
& IFF_POINTOPOINT
) {
1514 bond_dev
->flags
&= ~(IFF_BROADCAST
| IFF_MULTICAST
);
1515 bond_dev
->flags
|= (IFF_POINTOPOINT
| IFF_NOARP
);
1519 /* On bonding slaves other than the currently active slave, suppress
1520 * duplicates except for alb non-mcast/bcast.
1522 static bool bond_should_deliver_exact_match(struct sk_buff
*skb
,
1523 struct slave
*slave
,
1524 struct bonding
*bond
)
1526 if (bond_is_slave_inactive(slave
)) {
1527 if (BOND_MODE(bond
) == BOND_MODE_ALB
&&
1528 skb
->pkt_type
!= PACKET_BROADCAST
&&
1529 skb
->pkt_type
!= PACKET_MULTICAST
)
1536 static rx_handler_result_t
bond_handle_frame(struct sk_buff
**pskb
)
1538 struct sk_buff
*skb
= *pskb
;
1539 struct slave
*slave
;
1540 struct bonding
*bond
;
1541 int (*recv_probe
)(const struct sk_buff
*, struct bonding
*,
1543 int ret
= RX_HANDLER_ANOTHER
;
1545 skb
= skb_share_check(skb
, GFP_ATOMIC
);
1547 return RX_HANDLER_CONSUMED
;
1551 slave
= bond_slave_get_rcu(skb
->dev
);
1554 recv_probe
= READ_ONCE(bond
->recv_probe
);
1556 ret
= recv_probe(skb
, bond
, slave
);
1557 if (ret
== RX_HANDLER_CONSUMED
) {
1564 * For packets determined by bond_should_deliver_exact_match() call to
1565 * be suppressed we want to make an exception for link-local packets.
1566 * This is necessary for e.g. LLDP daemons to be able to monitor
1567 * inactive slave links without being forced to bind to them
1570 * At the same time, packets that are passed to the bonding master
1571 * (including link-local ones) can have their originating interface
1572 * determined via PACKET_ORIGDEV socket option.
1574 if (bond_should_deliver_exact_match(skb
, slave
, bond
)) {
1575 if (is_link_local_ether_addr(eth_hdr(skb
)->h_dest
))
1576 return RX_HANDLER_PASS
;
1577 return RX_HANDLER_EXACT
;
1580 skb
->dev
= bond
->dev
;
1582 if (BOND_MODE(bond
) == BOND_MODE_ALB
&&
1583 netif_is_bridge_port(bond
->dev
) &&
1584 skb
->pkt_type
== PACKET_HOST
) {
1586 if (unlikely(skb_cow_head(skb
,
1587 skb
->data
- skb_mac_header(skb
)))) {
1589 return RX_HANDLER_CONSUMED
;
1591 bond_hw_addr_copy(eth_hdr(skb
)->h_dest
, bond
->dev
->dev_addr
,
1592 bond
->dev
->addr_len
);
1598 static enum netdev_lag_tx_type
bond_lag_tx_type(struct bonding
*bond
)
1600 switch (BOND_MODE(bond
)) {
1601 case BOND_MODE_ROUNDROBIN
:
1602 return NETDEV_LAG_TX_TYPE_ROUNDROBIN
;
1603 case BOND_MODE_ACTIVEBACKUP
:
1604 return NETDEV_LAG_TX_TYPE_ACTIVEBACKUP
;
1605 case BOND_MODE_BROADCAST
:
1606 return NETDEV_LAG_TX_TYPE_BROADCAST
;
1608 case BOND_MODE_8023AD
:
1609 return NETDEV_LAG_TX_TYPE_HASH
;
1611 return NETDEV_LAG_TX_TYPE_UNKNOWN
;
1615 static enum netdev_lag_hash
bond_lag_hash_type(struct bonding
*bond
,
1616 enum netdev_lag_tx_type type
)
1618 if (type
!= NETDEV_LAG_TX_TYPE_HASH
)
1619 return NETDEV_LAG_HASH_NONE
;
1621 switch (bond
->params
.xmit_policy
) {
1622 case BOND_XMIT_POLICY_LAYER2
:
1623 return NETDEV_LAG_HASH_L2
;
1624 case BOND_XMIT_POLICY_LAYER34
:
1625 return NETDEV_LAG_HASH_L34
;
1626 case BOND_XMIT_POLICY_LAYER23
:
1627 return NETDEV_LAG_HASH_L23
;
1628 case BOND_XMIT_POLICY_ENCAP23
:
1629 return NETDEV_LAG_HASH_E23
;
1630 case BOND_XMIT_POLICY_ENCAP34
:
1631 return NETDEV_LAG_HASH_E34
;
1632 case BOND_XMIT_POLICY_VLAN_SRCMAC
:
1633 return NETDEV_LAG_HASH_VLAN_SRCMAC
;
1635 return NETDEV_LAG_HASH_UNKNOWN
;
1639 static int bond_master_upper_dev_link(struct bonding
*bond
, struct slave
*slave
,
1640 struct netlink_ext_ack
*extack
)
1642 struct netdev_lag_upper_info lag_upper_info
;
1643 enum netdev_lag_tx_type type
;
1646 type
= bond_lag_tx_type(bond
);
1647 lag_upper_info
.tx_type
= type
;
1648 lag_upper_info
.hash_type
= bond_lag_hash_type(bond
, type
);
1650 err
= netdev_master_upper_dev_link(slave
->dev
, bond
->dev
, slave
,
1651 &lag_upper_info
, extack
);
1655 slave
->dev
->flags
|= IFF_SLAVE
;
1659 static void bond_upper_dev_unlink(struct bonding
*bond
, struct slave
*slave
)
1661 netdev_upper_dev_unlink(slave
->dev
, bond
->dev
);
1662 slave
->dev
->flags
&= ~IFF_SLAVE
;
1665 static void slave_kobj_release(struct kobject
*kobj
)
1667 struct slave
*slave
= to_slave(kobj
);
1668 struct bonding
*bond
= bond_get_bond_by_slave(slave
);
1670 cancel_delayed_work_sync(&slave
->notify_work
);
1671 if (BOND_MODE(bond
) == BOND_MODE_8023AD
)
1672 kfree(SLAVE_AD_INFO(slave
));
1677 static struct kobj_type slave_ktype
= {
1678 .release
= slave_kobj_release
,
1680 .sysfs_ops
= &slave_sysfs_ops
,
1684 static int bond_kobj_init(struct slave
*slave
)
1688 err
= kobject_init_and_add(&slave
->kobj
, &slave_ktype
,
1689 &(slave
->dev
->dev
.kobj
), "bonding_slave");
1691 kobject_put(&slave
->kobj
);
1696 static struct slave
*bond_alloc_slave(struct bonding
*bond
,
1697 struct net_device
*slave_dev
)
1699 struct slave
*slave
= NULL
;
1701 slave
= kzalloc(sizeof(*slave
), GFP_KERNEL
);
1706 slave
->dev
= slave_dev
;
1707 INIT_DELAYED_WORK(&slave
->notify_work
, bond_netdev_notify_work
);
1709 if (bond_kobj_init(slave
))
1712 if (BOND_MODE(bond
) == BOND_MODE_8023AD
) {
1713 SLAVE_AD_INFO(slave
) = kzalloc(sizeof(struct ad_slave_info
),
1715 if (!SLAVE_AD_INFO(slave
)) {
1716 kobject_put(&slave
->kobj
);
1724 static void bond_fill_ifbond(struct bonding
*bond
, struct ifbond
*info
)
1726 info
->bond_mode
= BOND_MODE(bond
);
1727 info
->miimon
= bond
->params
.miimon
;
1728 info
->num_slaves
= bond
->slave_cnt
;
1731 static void bond_fill_ifslave(struct slave
*slave
, struct ifslave
*info
)
1733 strcpy(info
->slave_name
, slave
->dev
->name
);
1734 info
->link
= slave
->link
;
1735 info
->state
= bond_slave_state(slave
);
1736 info
->link_failure_count
= slave
->link_failure_count
;
1739 static void bond_netdev_notify_work(struct work_struct
*_work
)
1741 struct slave
*slave
= container_of(_work
, struct slave
,
1744 if (rtnl_trylock()) {
1745 struct netdev_bonding_info binfo
;
1747 bond_fill_ifslave(slave
, &binfo
.slave
);
1748 bond_fill_ifbond(slave
->bond
, &binfo
.master
);
1749 netdev_bonding_info_change(slave
->dev
, &binfo
);
1752 queue_delayed_work(slave
->bond
->wq
, &slave
->notify_work
, 1);
1756 void bond_queue_slave_event(struct slave
*slave
)
1758 queue_delayed_work(slave
->bond
->wq
, &slave
->notify_work
, 0);
1761 void bond_lower_state_changed(struct slave
*slave
)
1763 struct netdev_lag_lower_state_info info
;
1765 info
.link_up
= slave
->link
== BOND_LINK_UP
||
1766 slave
->link
== BOND_LINK_FAIL
;
1767 info
.tx_enabled
= bond_is_active_slave(slave
);
1768 netdev_lower_state_changed(slave
->dev
, &info
);
1771 #define BOND_NL_ERR(bond_dev, extack, errmsg) do { \
1773 NL_SET_ERR_MSG(extack, errmsg); \
1775 netdev_err(bond_dev, "Error: %s\n", errmsg); \
1778 #define SLAVE_NL_ERR(bond_dev, slave_dev, extack, errmsg) do { \
1780 NL_SET_ERR_MSG(extack, errmsg); \
1782 slave_err(bond_dev, slave_dev, "Error: %s\n", errmsg); \
1785 /* The bonding driver uses ether_setup() to convert a master bond device
1786 * to ARPHRD_ETHER, that resets the target netdevice's flags so we always
1787 * have to restore the IFF_MASTER flag, and only restore IFF_SLAVE and IFF_UP
1790 static void bond_ether_setup(struct net_device
*bond_dev
)
1792 unsigned int flags
= bond_dev
->flags
& (IFF_SLAVE
| IFF_UP
);
1794 ether_setup(bond_dev
);
1795 bond_dev
->flags
|= IFF_MASTER
| flags
;
1796 bond_dev
->priv_flags
&= ~IFF_TX_SKB_SHARING
;
1799 void bond_xdp_set_features(struct net_device
*bond_dev
)
1801 struct bonding
*bond
= netdev_priv(bond_dev
);
1802 xdp_features_t val
= NETDEV_XDP_ACT_MASK
;
1803 struct list_head
*iter
;
1804 struct slave
*slave
;
1808 if (!bond_xdp_check(bond
)) {
1809 xdp_clear_features_flag(bond_dev
);
1813 bond_for_each_slave(bond
, slave
, iter
)
1814 val
&= slave
->dev
->xdp_features
;
1816 xdp_set_features_flag(bond_dev
, val
);
1819 /* enslave device <slave> to bond device <master> */
1820 int bond_enslave(struct net_device
*bond_dev
, struct net_device
*slave_dev
,
1821 struct netlink_ext_ack
*extack
)
1823 struct bonding
*bond
= netdev_priv(bond_dev
);
1824 const struct net_device_ops
*slave_ops
= slave_dev
->netdev_ops
;
1825 struct slave
*new_slave
= NULL
, *prev_slave
;
1826 struct sockaddr_storage ss
;
1830 if (slave_dev
->flags
& IFF_MASTER
&&
1831 !netif_is_bond_master(slave_dev
)) {
1832 BOND_NL_ERR(bond_dev
, extack
,
1833 "Device type (master device) cannot be enslaved");
1837 if (!bond
->params
.use_carrier
&&
1838 slave_dev
->ethtool_ops
->get_link
== NULL
&&
1839 slave_ops
->ndo_eth_ioctl
== NULL
) {
1840 slave_warn(bond_dev
, slave_dev
, "no link monitoring support\n");
1843 /* already in-use? */
1844 if (netdev_is_rx_handler_busy(slave_dev
)) {
1845 SLAVE_NL_ERR(bond_dev
, slave_dev
, extack
,
1846 "Device is in use and cannot be enslaved");
1850 if (bond_dev
== slave_dev
) {
1851 BOND_NL_ERR(bond_dev
, extack
, "Cannot enslave bond to itself.");
1855 /* vlan challenged mutual exclusion */
1856 /* no need to lock since we're protected by rtnl_lock */
1857 if (slave_dev
->features
& NETIF_F_VLAN_CHALLENGED
) {
1858 slave_dbg(bond_dev
, slave_dev
, "is NETIF_F_VLAN_CHALLENGED\n");
1859 if (vlan_uses_dev(bond_dev
)) {
1860 SLAVE_NL_ERR(bond_dev
, slave_dev
, extack
,
1861 "Can not enslave VLAN challenged device to VLAN enabled bond");
1864 slave_warn(bond_dev
, slave_dev
, "enslaved VLAN challenged slave. Adding VLANs will be blocked as long as it is part of bond.\n");
1867 slave_dbg(bond_dev
, slave_dev
, "is !NETIF_F_VLAN_CHALLENGED\n");
1870 if (slave_dev
->features
& NETIF_F_HW_ESP
)
1871 slave_dbg(bond_dev
, slave_dev
, "is esp-hw-offload capable\n");
1873 /* Old ifenslave binaries are no longer supported. These can
1874 * be identified with moderate accuracy by the state of the slave:
1875 * the current ifenslave will set the interface down prior to
1876 * enslaving it; the old ifenslave will not.
1878 if (slave_dev
->flags
& IFF_UP
) {
1879 SLAVE_NL_ERR(bond_dev
, slave_dev
, extack
,
1880 "Device can not be enslaved while up");
1884 /* set bonding device ether type by slave - bonding netdevices are
1885 * created with ether_setup, so when the slave type is not ARPHRD_ETHER
1886 * there is a need to override some of the type dependent attribs/funcs.
1888 * bond ether type mutual exclusion - don't allow slaves of dissimilar
1889 * ether type (eg ARPHRD_ETHER and ARPHRD_INFINIBAND) share the same bond
1891 if (!bond_has_slaves(bond
)) {
1892 if (bond_dev
->type
!= slave_dev
->type
) {
1893 slave_dbg(bond_dev
, slave_dev
, "change device type from %d to %d\n",
1894 bond_dev
->type
, slave_dev
->type
);
1896 res
= call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE
,
1898 res
= notifier_to_errno(res
);
1900 slave_err(bond_dev
, slave_dev
, "refused to change device type\n");
1904 /* Flush unicast and multicast addresses */
1905 dev_uc_flush(bond_dev
);
1906 dev_mc_flush(bond_dev
);
1908 if (slave_dev
->type
!= ARPHRD_ETHER
)
1909 bond_setup_by_slave(bond_dev
, slave_dev
);
1911 bond_ether_setup(bond_dev
);
1913 call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE
,
1916 } else if (bond_dev
->type
!= slave_dev
->type
) {
1917 SLAVE_NL_ERR(bond_dev
, slave_dev
, extack
,
1918 "Device type is different from other slaves");
1922 if (slave_dev
->type
== ARPHRD_INFINIBAND
&&
1923 BOND_MODE(bond
) != BOND_MODE_ACTIVEBACKUP
) {
1924 SLAVE_NL_ERR(bond_dev
, slave_dev
, extack
,
1925 "Only active-backup mode is supported for infiniband slaves");
1927 goto err_undo_flags
;
1930 if (!slave_ops
->ndo_set_mac_address
||
1931 slave_dev
->type
== ARPHRD_INFINIBAND
) {
1932 slave_warn(bond_dev
, slave_dev
, "The slave device specified does not support setting the MAC address\n");
1933 if (BOND_MODE(bond
) == BOND_MODE_ACTIVEBACKUP
&&
1934 bond
->params
.fail_over_mac
!= BOND_FOM_ACTIVE
) {
1935 if (!bond_has_slaves(bond
)) {
1936 bond
->params
.fail_over_mac
= BOND_FOM_ACTIVE
;
1937 slave_warn(bond_dev
, slave_dev
, "Setting fail_over_mac to active for active-backup mode\n");
1939 SLAVE_NL_ERR(bond_dev
, slave_dev
, extack
,
1940 "Slave device does not support setting the MAC address, but fail_over_mac is not set to active");
1942 goto err_undo_flags
;
1947 call_netdevice_notifiers(NETDEV_JOIN
, slave_dev
);
1949 /* If this is the first slave, then we need to set the master's hardware
1950 * address to be the same as the slave's.
1952 if (!bond_has_slaves(bond
) &&
1953 bond
->dev
->addr_assign_type
== NET_ADDR_RANDOM
) {
1954 res
= bond_set_dev_addr(bond
->dev
, slave_dev
);
1956 goto err_undo_flags
;
1959 new_slave
= bond_alloc_slave(bond
, slave_dev
);
1962 goto err_undo_flags
;
1965 /* Set the new_slave's queue_id to be zero. Queue ID mapping
1966 * is set via sysfs or module option if desired.
1968 new_slave
->queue_id
= 0;
1970 /* Save slave's original mtu and then set it to match the bond */
1971 new_slave
->original_mtu
= slave_dev
->mtu
;
1972 res
= dev_set_mtu(slave_dev
, bond
->dev
->mtu
);
1974 slave_err(bond_dev
, slave_dev
, "Error %d calling dev_set_mtu\n", res
);
1978 /* Save slave's original ("permanent") mac address for modes
1979 * that need it, and for restoring it upon release, and then
1980 * set it to the master's address
1982 bond_hw_addr_copy(new_slave
->perm_hwaddr
, slave_dev
->dev_addr
,
1983 slave_dev
->addr_len
);
1985 if (!bond
->params
.fail_over_mac
||
1986 BOND_MODE(bond
) != BOND_MODE_ACTIVEBACKUP
) {
1987 /* Set slave to master's mac address. The application already
1988 * set the master's mac address to that of the first slave
1990 memcpy(ss
.__data
, bond_dev
->dev_addr
, bond_dev
->addr_len
);
1991 ss
.ss_family
= slave_dev
->type
;
1992 res
= dev_set_mac_address(slave_dev
, (struct sockaddr
*)&ss
,
1995 slave_err(bond_dev
, slave_dev
, "Error %d calling set_mac_address\n", res
);
1996 goto err_restore_mtu
;
2000 /* set no_addrconf flag before open to prevent IPv6 addrconf */
2001 slave_dev
->priv_flags
|= IFF_NO_ADDRCONF
;
2003 /* open the slave since the application closed it */
2004 res
= dev_open(slave_dev
, extack
);
2006 slave_err(bond_dev
, slave_dev
, "Opening slave failed\n");
2007 goto err_restore_mac
;
2010 slave_dev
->priv_flags
|= IFF_BONDING
;
2011 /* initialize slave stats */
2012 dev_get_stats(new_slave
->dev
, &new_slave
->slave_stats
);
2014 if (bond_is_lb(bond
)) {
2015 /* bond_alb_init_slave() must be called before all other stages since
2016 * it might fail and we do not want to have to undo everything
2018 res
= bond_alb_init_slave(bond
, new_slave
);
2023 res
= vlan_vids_add_by_dev(slave_dev
, bond_dev
);
2025 slave_err(bond_dev
, slave_dev
, "Couldn't add bond vlan ids\n");
2029 prev_slave
= bond_last_slave(bond
);
2031 new_slave
->delay
= 0;
2032 new_slave
->link_failure_count
= 0;
2034 if (bond_update_speed_duplex(new_slave
) &&
2035 bond_needs_speed_duplex(bond
))
2036 new_slave
->link
= BOND_LINK_DOWN
;
2038 new_slave
->last_rx
= jiffies
-
2039 (msecs_to_jiffies(bond
->params
.arp_interval
) + 1);
2040 for (i
= 0; i
< BOND_MAX_ARP_TARGETS
; i
++)
2041 new_slave
->target_last_arp_rx
[i
] = new_slave
->last_rx
;
2043 new_slave
->last_tx
= new_slave
->last_rx
;
2045 if (bond
->params
.miimon
&& !bond
->params
.use_carrier
) {
2046 link_reporting
= bond_check_dev_link(bond
, slave_dev
, 1);
2048 if ((link_reporting
== -1) && !bond
->params
.arp_interval
) {
2049 /* miimon is set but a bonded network driver
2050 * does not support ETHTOOL/MII and
2051 * arp_interval is not set. Note: if
2052 * use_carrier is enabled, we will never go
2053 * here (because netif_carrier is always
2054 * supported); thus, we don't need to change
2055 * the messages for netif_carrier.
2057 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");
2058 } else if (link_reporting
== -1) {
2059 /* unable get link status using mii/ethtool */
2060 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");
2064 /* check for initial state */
2065 new_slave
->link
= BOND_LINK_NOCHANGE
;
2066 if (bond
->params
.miimon
) {
2067 if (bond_check_dev_link(bond
, slave_dev
, 0) == BMSR_LSTATUS
) {
2068 if (bond
->params
.updelay
) {
2069 bond_set_slave_link_state(new_slave
,
2071 BOND_SLAVE_NOTIFY_NOW
);
2072 new_slave
->delay
= bond
->params
.updelay
;
2074 bond_set_slave_link_state(new_slave
,
2076 BOND_SLAVE_NOTIFY_NOW
);
2079 bond_set_slave_link_state(new_slave
, BOND_LINK_DOWN
,
2080 BOND_SLAVE_NOTIFY_NOW
);
2082 } else if (bond
->params
.arp_interval
) {
2083 bond_set_slave_link_state(new_slave
,
2084 (netif_carrier_ok(slave_dev
) ?
2085 BOND_LINK_UP
: BOND_LINK_DOWN
),
2086 BOND_SLAVE_NOTIFY_NOW
);
2088 bond_set_slave_link_state(new_slave
, BOND_LINK_UP
,
2089 BOND_SLAVE_NOTIFY_NOW
);
2092 if (new_slave
->link
!= BOND_LINK_DOWN
)
2093 new_slave
->last_link_up
= jiffies
;
2094 slave_dbg(bond_dev
, slave_dev
, "Initial state of slave is BOND_LINK_%s\n",
2095 new_slave
->link
== BOND_LINK_DOWN
? "DOWN" :
2096 (new_slave
->link
== BOND_LINK_UP
? "UP" : "BACK"));
2098 if (bond_uses_primary(bond
) && bond
->params
.primary
[0]) {
2099 /* if there is a primary slave, remember it */
2100 if (strcmp(bond
->params
.primary
, new_slave
->dev
->name
) == 0) {
2101 rcu_assign_pointer(bond
->primary_slave
, new_slave
);
2102 bond
->force_primary
= true;
2106 switch (BOND_MODE(bond
)) {
2107 case BOND_MODE_ACTIVEBACKUP
:
2108 bond_set_slave_inactive_flags(new_slave
,
2109 BOND_SLAVE_NOTIFY_NOW
);
2111 case BOND_MODE_8023AD
:
2112 /* in 802.3ad mode, the internal mechanism
2113 * will activate the slaves in the selected
2116 bond_set_slave_inactive_flags(new_slave
, BOND_SLAVE_NOTIFY_NOW
);
2117 /* if this is the first slave */
2119 SLAVE_AD_INFO(new_slave
)->id
= 1;
2120 /* Initialize AD with the number of times that the AD timer is called in 1 second
2121 * can be called only after the mac address of the bond is set
2123 bond_3ad_initialize(bond
);
2125 SLAVE_AD_INFO(new_slave
)->id
=
2126 SLAVE_AD_INFO(prev_slave
)->id
+ 1;
2129 bond_3ad_bind_slave(new_slave
);
2133 bond_set_active_slave(new_slave
);
2134 bond_set_slave_inactive_flags(new_slave
, BOND_SLAVE_NOTIFY_NOW
);
2137 slave_dbg(bond_dev
, slave_dev
, "This slave is always active in trunk mode\n");
2139 /* always active in trunk mode */
2140 bond_set_active_slave(new_slave
);
2142 /* In trunking mode there is little meaning to curr_active_slave
2143 * anyway (it holds no special properties of the bond device),
2144 * so we can change it without calling change_active_interface()
2146 if (!rcu_access_pointer(bond
->curr_active_slave
) &&
2147 new_slave
->link
== BOND_LINK_UP
)
2148 rcu_assign_pointer(bond
->curr_active_slave
, new_slave
);
2151 } /* switch(bond_mode) */
2153 #ifdef CONFIG_NET_POLL_CONTROLLER
2154 if (bond
->dev
->npinfo
) {
2155 if (slave_enable_netpoll(new_slave
)) {
2156 slave_info(bond_dev
, slave_dev
, "master_dev is using netpoll, but new slave device does not support netpoll\n");
2163 if (!(bond_dev
->features
& NETIF_F_LRO
))
2164 dev_disable_lro(slave_dev
);
2166 res
= netdev_rx_handler_register(slave_dev
, bond_handle_frame
,
2169 slave_dbg(bond_dev
, slave_dev
, "Error %d calling netdev_rx_handler_register\n", res
);
2173 res
= bond_master_upper_dev_link(bond
, new_slave
, extack
);
2175 slave_dbg(bond_dev
, slave_dev
, "Error %d calling bond_master_upper_dev_link\n", res
);
2176 goto err_unregister
;
2179 bond_lower_state_changed(new_slave
);
2181 res
= bond_sysfs_slave_add(new_slave
);
2183 slave_dbg(bond_dev
, slave_dev
, "Error %d calling bond_sysfs_slave_add\n", res
);
2184 goto err_upper_unlink
;
2187 /* If the mode uses primary, then the following is handled by
2188 * bond_change_active_slave().
2190 if (!bond_uses_primary(bond
)) {
2191 /* set promiscuity level to new slave */
2192 if (bond_dev
->flags
& IFF_PROMISC
) {
2193 res
= dev_set_promiscuity(slave_dev
, 1);
2198 /* set allmulti level to new slave */
2199 if (bond_dev
->flags
& IFF_ALLMULTI
) {
2200 res
= dev_set_allmulti(slave_dev
, 1);
2202 if (bond_dev
->flags
& IFF_PROMISC
)
2203 dev_set_promiscuity(slave_dev
, -1);
2208 if (bond_dev
->flags
& IFF_UP
) {
2209 netif_addr_lock_bh(bond_dev
);
2210 dev_mc_sync_multiple(slave_dev
, bond_dev
);
2211 dev_uc_sync_multiple(slave_dev
, bond_dev
);
2212 netif_addr_unlock_bh(bond_dev
);
2214 if (BOND_MODE(bond
) == BOND_MODE_8023AD
)
2215 dev_mc_add(slave_dev
, lacpdu_mcast_addr
);
2220 bond_compute_features(bond
);
2221 bond_set_carrier(bond
);
2223 if (bond_uses_primary(bond
)) {
2225 bond_select_active_slave(bond
);
2226 unblock_netpoll_tx();
2229 if (bond_mode_can_use_xmit_hash(bond
))
2230 bond_update_slave_arr(bond
, NULL
);
2233 if (!slave_dev
->netdev_ops
->ndo_bpf
||
2234 !slave_dev
->netdev_ops
->ndo_xdp_xmit
) {
2235 if (bond
->xdp_prog
) {
2236 SLAVE_NL_ERR(bond_dev
, slave_dev
, extack
,
2237 "Slave does not support XDP");
2241 } else if (bond
->xdp_prog
) {
2242 struct netdev_bpf xdp
= {
2243 .command
= XDP_SETUP_PROG
,
2245 .prog
= bond
->xdp_prog
,
2249 if (dev_xdp_prog_count(slave_dev
) > 0) {
2250 SLAVE_NL_ERR(bond_dev
, slave_dev
, extack
,
2251 "Slave has XDP program loaded, please unload before enslaving");
2256 res
= slave_dev
->netdev_ops
->ndo_bpf(slave_dev
, &xdp
);
2258 /* ndo_bpf() sets extack error message */
2259 slave_dbg(bond_dev
, slave_dev
, "Error %d calling ndo_bpf\n", res
);
2263 bpf_prog_inc(bond
->xdp_prog
);
2266 bond_xdp_set_features(bond_dev
);
2268 slave_info(bond_dev
, slave_dev
, "Enslaving as %s interface with %s link\n",
2269 bond_is_active_slave(new_slave
) ? "an active" : "a backup",
2270 new_slave
->link
!= BOND_LINK_DOWN
? "an up" : "a down");
2272 /* enslave is successful */
2273 bond_queue_slave_event(new_slave
);
2276 /* Undo stages on error */
2278 bond_sysfs_slave_del(new_slave
);
2281 bond_upper_dev_unlink(bond
, new_slave
);
2284 netdev_rx_handler_unregister(slave_dev
);
2287 vlan_vids_del_by_dev(slave_dev
, bond_dev
);
2288 if (rcu_access_pointer(bond
->primary_slave
) == new_slave
)
2289 RCU_INIT_POINTER(bond
->primary_slave
, NULL
);
2290 if (rcu_access_pointer(bond
->curr_active_slave
) == new_slave
) {
2292 bond_change_active_slave(bond
, NULL
);
2293 bond_select_active_slave(bond
);
2294 unblock_netpoll_tx();
2296 /* either primary_slave or curr_active_slave might've changed */
2298 slave_disable_netpoll(new_slave
);
2301 if (!netif_is_bond_master(slave_dev
))
2302 slave_dev
->priv_flags
&= ~IFF_BONDING
;
2303 dev_close(slave_dev
);
2306 slave_dev
->priv_flags
&= ~IFF_NO_ADDRCONF
;
2307 if (!bond
->params
.fail_over_mac
||
2308 BOND_MODE(bond
) != BOND_MODE_ACTIVEBACKUP
) {
2309 /* XXX TODO - fom follow mode needs to change master's
2310 * MAC if this slave's MAC is in use by the bond, or at
2311 * least print a warning.
2313 bond_hw_addr_copy(ss
.__data
, new_slave
->perm_hwaddr
,
2314 new_slave
->dev
->addr_len
);
2315 ss
.ss_family
= slave_dev
->type
;
2316 dev_set_mac_address(slave_dev
, (struct sockaddr
*)&ss
, NULL
);
2320 dev_set_mtu(slave_dev
, new_slave
->original_mtu
);
2323 kobject_put(&new_slave
->kobj
);
2326 /* Enslave of first slave has failed and we need to fix master's mac */
2327 if (!bond_has_slaves(bond
)) {
2328 if (ether_addr_equal_64bits(bond_dev
->dev_addr
,
2329 slave_dev
->dev_addr
))
2330 eth_hw_addr_random(bond_dev
);
2331 if (bond_dev
->type
!= ARPHRD_ETHER
) {
2332 dev_close(bond_dev
);
2333 bond_ether_setup(bond_dev
);
2340 /* Try to release the slave device <slave> from the bond device <master>
2341 * It is legal to access curr_active_slave without a lock because all the function
2342 * is RTNL-locked. If "all" is true it means that the function is being called
2343 * while destroying a bond interface and all slaves are being released.
2345 * The rules for slave state should be:
2346 * for Active/Backup:
2347 * Active stays on all backups go down
2348 * for Bonded connections:
2349 * The first up interface should be left on and all others downed.
2351 static int __bond_release_one(struct net_device
*bond_dev
,
2352 struct net_device
*slave_dev
,
2353 bool all
, bool unregister
)
2355 struct bonding
*bond
= netdev_priv(bond_dev
);
2356 struct slave
*slave
, *oldcurrent
;
2357 struct sockaddr_storage ss
;
2358 int old_flags
= bond_dev
->flags
;
2359 netdev_features_t old_features
= bond_dev
->features
;
2361 /* slave is not a slave or master is not master of this slave */
2362 if (!(slave_dev
->flags
& IFF_SLAVE
) ||
2363 !netdev_has_upper_dev(slave_dev
, bond_dev
)) {
2364 slave_dbg(bond_dev
, slave_dev
, "cannot release slave\n");
2370 slave
= bond_get_slave_by_dev(bond
, slave_dev
);
2372 /* not a slave of this bond */
2373 slave_info(bond_dev
, slave_dev
, "interface not enslaved\n");
2374 unblock_netpoll_tx();
2378 bond_set_slave_inactive_flags(slave
, BOND_SLAVE_NOTIFY_NOW
);
2380 bond_sysfs_slave_del(slave
);
2382 /* recompute stats just before removing the slave */
2383 bond_get_stats(bond
->dev
, &bond
->bond_stats
);
2385 if (bond
->xdp_prog
) {
2386 struct netdev_bpf xdp
= {
2387 .command
= XDP_SETUP_PROG
,
2392 if (slave_dev
->netdev_ops
->ndo_bpf(slave_dev
, &xdp
))
2393 slave_warn(bond_dev
, slave_dev
, "failed to unload XDP program\n");
2396 /* unregister rx_handler early so bond_handle_frame wouldn't be called
2397 * for this slave anymore.
2399 netdev_rx_handler_unregister(slave_dev
);
2401 if (BOND_MODE(bond
) == BOND_MODE_8023AD
)
2402 bond_3ad_unbind_slave(slave
);
2404 bond_upper_dev_unlink(bond
, slave
);
2406 if (bond_mode_can_use_xmit_hash(bond
))
2407 bond_update_slave_arr(bond
, slave
);
2409 slave_info(bond_dev
, slave_dev
, "Releasing %s interface\n",
2410 bond_is_active_slave(slave
) ? "active" : "backup");
2412 oldcurrent
= rcu_access_pointer(bond
->curr_active_slave
);
2414 RCU_INIT_POINTER(bond
->current_arp_slave
, NULL
);
2416 if (!all
&& (!bond
->params
.fail_over_mac
||
2417 BOND_MODE(bond
) != BOND_MODE_ACTIVEBACKUP
)) {
2418 if (ether_addr_equal_64bits(bond_dev
->dev_addr
, slave
->perm_hwaddr
) &&
2419 bond_has_slaves(bond
))
2420 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",
2421 slave
->perm_hwaddr
);
2424 if (rtnl_dereference(bond
->primary_slave
) == slave
)
2425 RCU_INIT_POINTER(bond
->primary_slave
, NULL
);
2427 if (oldcurrent
== slave
)
2428 bond_change_active_slave(bond
, NULL
);
2430 if (bond_is_lb(bond
)) {
2431 /* Must be called only after the slave has been
2432 * detached from the list and the curr_active_slave
2433 * has been cleared (if our_slave == old_current),
2434 * but before a new active slave is selected.
2436 bond_alb_deinit_slave(bond
, slave
);
2440 RCU_INIT_POINTER(bond
->curr_active_slave
, NULL
);
2441 } else if (oldcurrent
== slave
) {
2442 /* Note that we hold RTNL over this sequence, so there
2443 * is no concern that another slave add/remove event
2446 bond_select_active_slave(bond
);
2449 bond_set_carrier(bond
);
2450 if (!bond_has_slaves(bond
))
2451 eth_hw_addr_random(bond_dev
);
2453 unblock_netpoll_tx();
2457 if (!bond_has_slaves(bond
)) {
2458 call_netdevice_notifiers(NETDEV_CHANGEADDR
, bond
->dev
);
2459 call_netdevice_notifiers(NETDEV_RELEASE
, bond
->dev
);
2462 bond_compute_features(bond
);
2463 if (!(bond_dev
->features
& NETIF_F_VLAN_CHALLENGED
) &&
2464 (old_features
& NETIF_F_VLAN_CHALLENGED
))
2465 slave_info(bond_dev
, slave_dev
, "last VLAN challenged slave left bond - VLAN blocking is removed\n");
2467 vlan_vids_del_by_dev(slave_dev
, bond_dev
);
2469 /* If the mode uses primary, then this case was handled above by
2470 * bond_change_active_slave(..., NULL)
2472 if (!bond_uses_primary(bond
)) {
2473 /* unset promiscuity level from slave
2474 * NOTE: The NETDEV_CHANGEADDR call above may change the value
2475 * of the IFF_PROMISC flag in the bond_dev, but we need the
2476 * value of that flag before that change, as that was the value
2477 * when this slave was attached, so we cache at the start of the
2478 * function and use it here. Same goes for ALLMULTI below
2480 if (old_flags
& IFF_PROMISC
)
2481 dev_set_promiscuity(slave_dev
, -1);
2483 /* unset allmulti level from slave */
2484 if (old_flags
& IFF_ALLMULTI
)
2485 dev_set_allmulti(slave_dev
, -1);
2487 if (old_flags
& IFF_UP
)
2488 bond_hw_addr_flush(bond_dev
, slave_dev
);
2491 slave_disable_netpoll(slave
);
2493 /* close slave before restoring its mac address */
2494 dev_close(slave_dev
);
2496 slave_dev
->priv_flags
&= ~IFF_NO_ADDRCONF
;
2498 if (bond
->params
.fail_over_mac
!= BOND_FOM_ACTIVE
||
2499 BOND_MODE(bond
) != BOND_MODE_ACTIVEBACKUP
) {
2500 /* restore original ("permanent") mac address */
2501 bond_hw_addr_copy(ss
.__data
, slave
->perm_hwaddr
,
2502 slave
->dev
->addr_len
);
2503 ss
.ss_family
= slave_dev
->type
;
2504 dev_set_mac_address(slave_dev
, (struct sockaddr
*)&ss
, NULL
);
2508 __dev_set_mtu(slave_dev
, slave
->original_mtu
);
2510 dev_set_mtu(slave_dev
, slave
->original_mtu
);
2512 if (!netif_is_bond_master(slave_dev
))
2513 slave_dev
->priv_flags
&= ~IFF_BONDING
;
2515 bond_xdp_set_features(bond_dev
);
2516 kobject_put(&slave
->kobj
);
2521 /* A wrapper used because of ndo_del_link */
2522 int bond_release(struct net_device
*bond_dev
, struct net_device
*slave_dev
)
2524 return __bond_release_one(bond_dev
, slave_dev
, false, false);
2527 /* First release a slave and then destroy the bond if no more slaves are left.
2528 * Must be under rtnl_lock when this function is called.
2530 static int bond_release_and_destroy(struct net_device
*bond_dev
,
2531 struct net_device
*slave_dev
)
2533 struct bonding
*bond
= netdev_priv(bond_dev
);
2536 ret
= __bond_release_one(bond_dev
, slave_dev
, false, true);
2537 if (ret
== 0 && !bond_has_slaves(bond
) &&
2538 bond_dev
->reg_state
!= NETREG_UNREGISTERING
) {
2539 bond_dev
->priv_flags
|= IFF_DISABLE_NETPOLL
;
2540 netdev_info(bond_dev
, "Destroying bond\n");
2541 bond_remove_proc_entry(bond
);
2542 unregister_netdevice(bond_dev
);
2547 static void bond_info_query(struct net_device
*bond_dev
, struct ifbond
*info
)
2549 struct bonding
*bond
= netdev_priv(bond_dev
);
2551 bond_fill_ifbond(bond
, info
);
2554 static int bond_slave_info_query(struct net_device
*bond_dev
, struct ifslave
*info
)
2556 struct bonding
*bond
= netdev_priv(bond_dev
);
2557 struct list_head
*iter
;
2558 int i
= 0, res
= -ENODEV
;
2559 struct slave
*slave
;
2561 bond_for_each_slave(bond
, slave
, iter
) {
2562 if (i
++ == (int)info
->slave_id
) {
2564 bond_fill_ifslave(slave
, info
);
2572 /*-------------------------------- Monitoring -------------------------------*/
2574 /* called with rcu_read_lock() */
2575 static int bond_miimon_inspect(struct bonding
*bond
)
2577 bool ignore_updelay
= false;
2578 int link_state
, commit
= 0;
2579 struct list_head
*iter
;
2580 struct slave
*slave
;
2582 if (BOND_MODE(bond
) == BOND_MODE_ACTIVEBACKUP
) {
2583 ignore_updelay
= !rcu_dereference(bond
->curr_active_slave
);
2585 struct bond_up_slave
*usable_slaves
;
2587 usable_slaves
= rcu_dereference(bond
->usable_slaves
);
2589 if (usable_slaves
&& usable_slaves
->count
== 0)
2590 ignore_updelay
= true;
2593 bond_for_each_slave_rcu(bond
, slave
, iter
) {
2594 bond_propose_link_state(slave
, BOND_LINK_NOCHANGE
);
2596 link_state
= bond_check_dev_link(bond
, slave
->dev
, 0);
2598 switch (slave
->link
) {
2603 bond_propose_link_state(slave
, BOND_LINK_FAIL
);
2605 slave
->delay
= bond
->params
.downdelay
;
2607 slave_info(bond
->dev
, slave
->dev
, "link status down for %sinterface, disabling it in %d ms\n",
2609 BOND_MODE_ACTIVEBACKUP
) ?
2610 (bond_is_active_slave(slave
) ?
2611 "active " : "backup ") : "",
2612 bond
->params
.downdelay
* bond
->params
.miimon
);
2615 case BOND_LINK_FAIL
:
2617 /* recovered before downdelay expired */
2618 bond_propose_link_state(slave
, BOND_LINK_UP
);
2619 slave
->last_link_up
= jiffies
;
2620 slave_info(bond
->dev
, slave
->dev
, "link status up again after %d ms\n",
2621 (bond
->params
.downdelay
- slave
->delay
) *
2622 bond
->params
.miimon
);
2627 if (slave
->delay
<= 0) {
2628 bond_propose_link_state(slave
, BOND_LINK_DOWN
);
2636 case BOND_LINK_DOWN
:
2640 bond_propose_link_state(slave
, BOND_LINK_BACK
);
2642 slave
->delay
= bond
->params
.updelay
;
2645 slave_info(bond
->dev
, slave
->dev
, "link status up, enabling it in %d ms\n",
2646 ignore_updelay
? 0 :
2647 bond
->params
.updelay
*
2648 bond
->params
.miimon
);
2651 case BOND_LINK_BACK
:
2653 bond_propose_link_state(slave
, BOND_LINK_DOWN
);
2654 slave_info(bond
->dev
, slave
->dev
, "link status down again after %d ms\n",
2655 (bond
->params
.updelay
- slave
->delay
) *
2656 bond
->params
.miimon
);
2664 if (slave
->delay
<= 0) {
2665 bond_propose_link_state(slave
, BOND_LINK_UP
);
2667 ignore_updelay
= false;
2679 static void bond_miimon_link_change(struct bonding
*bond
,
2680 struct slave
*slave
,
2683 switch (BOND_MODE(bond
)) {
2684 case BOND_MODE_8023AD
:
2685 bond_3ad_handle_link_change(slave
, link
);
2689 bond_alb_handle_link_change(bond
, slave
, link
);
2692 bond_update_slave_arr(bond
, NULL
);
2697 static void bond_miimon_commit(struct bonding
*bond
)
2699 struct slave
*slave
, *primary
, *active
;
2700 bool do_failover
= false;
2701 struct list_head
*iter
;
2705 bond_for_each_slave(bond
, slave
, iter
) {
2706 switch (slave
->link_new_state
) {
2707 case BOND_LINK_NOCHANGE
:
2708 /* For 802.3ad mode, check current slave speed and
2709 * duplex again in case its port was disabled after
2710 * invalid speed/duplex reporting but recovered before
2711 * link monitoring could make a decision on the actual
2714 if (BOND_MODE(bond
) == BOND_MODE_8023AD
&&
2715 slave
->link
== BOND_LINK_UP
)
2716 bond_3ad_adapter_speed_duplex_changed(slave
);
2720 if (bond_update_speed_duplex(slave
) &&
2721 bond_needs_speed_duplex(bond
)) {
2722 slave
->link
= BOND_LINK_DOWN
;
2723 if (net_ratelimit())
2724 slave_warn(bond
->dev
, slave
->dev
,
2725 "failed to get link speed/duplex\n");
2728 bond_set_slave_link_state(slave
, BOND_LINK_UP
,
2729 BOND_SLAVE_NOTIFY_NOW
);
2730 slave
->last_link_up
= jiffies
;
2732 primary
= rtnl_dereference(bond
->primary_slave
);
2733 if (BOND_MODE(bond
) == BOND_MODE_8023AD
) {
2734 /* prevent it from being the active one */
2735 bond_set_backup_slave(slave
);
2736 } else if (BOND_MODE(bond
) != BOND_MODE_ACTIVEBACKUP
) {
2737 /* make it immediately active */
2738 bond_set_active_slave(slave
);
2741 slave_info(bond
->dev
, slave
->dev
, "link status definitely up, %u Mbps %s duplex\n",
2742 slave
->speed
== SPEED_UNKNOWN
? 0 : slave
->speed
,
2743 slave
->duplex
? "full" : "half");
2745 bond_miimon_link_change(bond
, slave
, BOND_LINK_UP
);
2747 active
= rtnl_dereference(bond
->curr_active_slave
);
2748 if (!active
|| slave
== primary
|| slave
->prio
> active
->prio
)
2753 case BOND_LINK_DOWN
:
2754 if (slave
->link_failure_count
< UINT_MAX
)
2755 slave
->link_failure_count
++;
2757 bond_set_slave_link_state(slave
, BOND_LINK_DOWN
,
2758 BOND_SLAVE_NOTIFY_NOW
);
2760 if (BOND_MODE(bond
) == BOND_MODE_ACTIVEBACKUP
||
2761 BOND_MODE(bond
) == BOND_MODE_8023AD
)
2762 bond_set_slave_inactive_flags(slave
,
2763 BOND_SLAVE_NOTIFY_NOW
);
2765 slave_info(bond
->dev
, slave
->dev
, "link status definitely down, disabling slave\n");
2767 bond_miimon_link_change(bond
, slave
, BOND_LINK_DOWN
);
2769 if (slave
== rcu_access_pointer(bond
->curr_active_slave
))
2775 slave_err(bond
->dev
, slave
->dev
, "invalid new link %d on slave\n",
2776 slave
->link_new_state
);
2777 bond_propose_link_state(slave
, BOND_LINK_NOCHANGE
);
2785 bond_select_active_slave(bond
);
2786 unblock_netpoll_tx();
2789 bond_set_carrier(bond
);
2794 * Really a wrapper that splits the mii monitor into two phases: an
2795 * inspection, then (if inspection indicates something needs to be done)
2796 * an acquisition of appropriate locks followed by a commit phase to
2797 * implement whatever link state changes are indicated.
2799 static void bond_mii_monitor(struct work_struct
*work
)
2801 struct bonding
*bond
= container_of(work
, struct bonding
,
2803 bool should_notify_peers
= false;
2805 unsigned long delay
;
2806 struct slave
*slave
;
2807 struct list_head
*iter
;
2809 delay
= msecs_to_jiffies(bond
->params
.miimon
);
2811 if (!bond_has_slaves(bond
))
2815 should_notify_peers
= bond_should_notify_peers(bond
);
2816 commit
= !!bond_miimon_inspect(bond
);
2817 if (bond
->send_peer_notif
) {
2819 if (rtnl_trylock()) {
2820 bond
->send_peer_notif
--;
2828 /* Race avoidance with bond_close cancel of workqueue */
2829 if (!rtnl_trylock()) {
2831 should_notify_peers
= false;
2835 bond_for_each_slave(bond
, slave
, iter
) {
2836 bond_commit_link_state(slave
, BOND_SLAVE_NOTIFY_LATER
);
2838 bond_miimon_commit(bond
);
2840 rtnl_unlock(); /* might sleep, hold no other locks */
2844 if (bond
->params
.miimon
)
2845 queue_delayed_work(bond
->wq
, &bond
->mii_work
, delay
);
2847 if (should_notify_peers
) {
2848 if (!rtnl_trylock())
2850 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS
, bond
->dev
);
2855 static int bond_upper_dev_walk(struct net_device
*upper
,
2856 struct netdev_nested_priv
*priv
)
2858 __be32 ip
= *(__be32
*)priv
->data
;
2860 return ip
== bond_confirm_addr(upper
, 0, ip
);
2863 static bool bond_has_this_ip(struct bonding
*bond
, __be32 ip
)
2865 struct netdev_nested_priv priv
= {
2866 .data
= (void *)&ip
,
2870 if (ip
== bond_confirm_addr(bond
->dev
, 0, ip
))
2874 if (netdev_walk_all_upper_dev_rcu(bond
->dev
, bond_upper_dev_walk
, &priv
))
2881 #define BOND_VLAN_PROTO_NONE cpu_to_be16(0xffff)
2883 static bool bond_handle_vlan(struct slave
*slave
, struct bond_vlan_tag
*tags
,
2884 struct sk_buff
*skb
)
2886 struct net_device
*bond_dev
= slave
->bond
->dev
;
2887 struct net_device
*slave_dev
= slave
->dev
;
2888 struct bond_vlan_tag
*outer_tag
= tags
;
2890 if (!tags
|| tags
->vlan_proto
== BOND_VLAN_PROTO_NONE
)
2895 /* Go through all the tags backwards and add them to the packet */
2896 while (tags
->vlan_proto
!= BOND_VLAN_PROTO_NONE
) {
2897 if (!tags
->vlan_id
) {
2902 slave_dbg(bond_dev
, slave_dev
, "inner tag: proto %X vid %X\n",
2903 ntohs(outer_tag
->vlan_proto
), tags
->vlan_id
);
2904 skb
= vlan_insert_tag_set_proto(skb
, tags
->vlan_proto
,
2907 net_err_ratelimited("failed to insert inner VLAN tag\n");
2913 /* Set the outer tag */
2914 if (outer_tag
->vlan_id
) {
2915 slave_dbg(bond_dev
, slave_dev
, "outer tag: proto %X vid %X\n",
2916 ntohs(outer_tag
->vlan_proto
), outer_tag
->vlan_id
);
2917 __vlan_hwaccel_put_tag(skb
, outer_tag
->vlan_proto
,
2918 outer_tag
->vlan_id
);
2924 /* We go to the (large) trouble of VLAN tagging ARP frames because
2925 * switches in VLAN mode (especially if ports are configured as
2926 * "native" to a VLAN) might not pass non-tagged frames.
2928 static void bond_arp_send(struct slave
*slave
, int arp_op
, __be32 dest_ip
,
2929 __be32 src_ip
, struct bond_vlan_tag
*tags
)
2931 struct net_device
*bond_dev
= slave
->bond
->dev
;
2932 struct net_device
*slave_dev
= slave
->dev
;
2933 struct sk_buff
*skb
;
2935 slave_dbg(bond_dev
, slave_dev
, "arp %d on slave: dst %pI4 src %pI4\n",
2936 arp_op
, &dest_ip
, &src_ip
);
2938 skb
= arp_create(arp_op
, ETH_P_ARP
, dest_ip
, slave_dev
, src_ip
,
2939 NULL
, slave_dev
->dev_addr
, NULL
);
2942 net_err_ratelimited("ARP packet allocation failed\n");
2946 if (bond_handle_vlan(slave
, tags
, skb
)) {
2947 slave_update_last_tx(slave
);
2954 /* Validate the device path between the @start_dev and the @end_dev.
2955 * The path is valid if the @end_dev is reachable through device
2957 * When the path is validated, collect any vlan information in the
2960 struct bond_vlan_tag
*bond_verify_device_path(struct net_device
*start_dev
,
2961 struct net_device
*end_dev
,
2964 struct bond_vlan_tag
*tags
;
2965 struct net_device
*upper
;
2966 struct list_head
*iter
;
2968 if (start_dev
== end_dev
) {
2969 tags
= kcalloc(level
+ 1, sizeof(*tags
), GFP_ATOMIC
);
2971 return ERR_PTR(-ENOMEM
);
2972 tags
[level
].vlan_proto
= BOND_VLAN_PROTO_NONE
;
2976 netdev_for_each_upper_dev_rcu(start_dev
, upper
, iter
) {
2977 tags
= bond_verify_device_path(upper
, end_dev
, level
+ 1);
2978 if (IS_ERR_OR_NULL(tags
)) {
2983 if (is_vlan_dev(upper
)) {
2984 tags
[level
].vlan_proto
= vlan_dev_vlan_proto(upper
);
2985 tags
[level
].vlan_id
= vlan_dev_vlan_id(upper
);
2994 static void bond_arp_send_all(struct bonding
*bond
, struct slave
*slave
)
2997 struct bond_vlan_tag
*tags
;
2998 __be32
*targets
= bond
->params
.arp_targets
, addr
;
3001 for (i
= 0; i
< BOND_MAX_ARP_TARGETS
&& targets
[i
]; i
++) {
3002 slave_dbg(bond
->dev
, slave
->dev
, "%s: target %pI4\n",
3003 __func__
, &targets
[i
]);
3006 /* Find out through which dev should the packet go */
3007 rt
= ip_route_output(dev_net(bond
->dev
), targets
[i
], 0,
3010 /* there's no route to target - try to send arp
3011 * probe to generate any traffic (arp_validate=0)
3013 if (bond
->params
.arp_validate
)
3014 pr_warn_once("%s: no route to arp_ip_target %pI4 and arp_validate is set\n",
3017 bond_arp_send(slave
, ARPOP_REQUEST
, targets
[i
],
3022 /* bond device itself */
3023 if (rt
->dst
.dev
== bond
->dev
)
3027 tags
= bond_verify_device_path(bond
->dev
, rt
->dst
.dev
, 0);
3030 if (!IS_ERR_OR_NULL(tags
))
3033 /* Not our device - skip */
3034 slave_dbg(bond
->dev
, slave
->dev
, "no path to arp_ip_target %pI4 via rt.dev %s\n",
3035 &targets
[i
], rt
->dst
.dev
? rt
->dst
.dev
->name
: "NULL");
3041 addr
= bond_confirm_addr(rt
->dst
.dev
, targets
[i
], 0);
3043 bond_arp_send(slave
, ARPOP_REQUEST
, targets
[i
], addr
, tags
);
3048 static void bond_validate_arp(struct bonding
*bond
, struct slave
*slave
, __be32 sip
, __be32 tip
)
3052 if (!sip
|| !bond_has_this_ip(bond
, tip
)) {
3053 slave_dbg(bond
->dev
, slave
->dev
, "%s: sip %pI4 tip %pI4 not found\n",
3054 __func__
, &sip
, &tip
);
3058 i
= bond_get_targets_ip(bond
->params
.arp_targets
, sip
);
3060 slave_dbg(bond
->dev
, slave
->dev
, "%s: sip %pI4 not found in targets\n",
3064 slave
->last_rx
= jiffies
;
3065 slave
->target_last_arp_rx
[i
] = jiffies
;
3068 static int bond_arp_rcv(const struct sk_buff
*skb
, struct bonding
*bond
,
3069 struct slave
*slave
)
3071 struct arphdr
*arp
= (struct arphdr
*)skb
->data
;
3072 struct slave
*curr_active_slave
, *curr_arp_slave
;
3073 unsigned char *arp_ptr
;
3077 alen
= arp_hdr_len(bond
->dev
);
3079 if (alen
> skb_headlen(skb
)) {
3080 arp
= kmalloc(alen
, GFP_ATOMIC
);
3083 if (skb_copy_bits(skb
, 0, arp
, alen
) < 0)
3087 if (arp
->ar_hln
!= bond
->dev
->addr_len
||
3088 skb
->pkt_type
== PACKET_OTHERHOST
||
3089 skb
->pkt_type
== PACKET_LOOPBACK
||
3090 arp
->ar_hrd
!= htons(ARPHRD_ETHER
) ||
3091 arp
->ar_pro
!= htons(ETH_P_IP
) ||
3095 arp_ptr
= (unsigned char *)(arp
+ 1);
3096 arp_ptr
+= bond
->dev
->addr_len
;
3097 memcpy(&sip
, arp_ptr
, 4);
3098 arp_ptr
+= 4 + bond
->dev
->addr_len
;
3099 memcpy(&tip
, arp_ptr
, 4);
3101 slave_dbg(bond
->dev
, slave
->dev
, "%s: %s/%d av %d sv %d sip %pI4 tip %pI4\n",
3102 __func__
, slave
->dev
->name
, bond_slave_state(slave
),
3103 bond
->params
.arp_validate
, slave_do_arp_validate(bond
, slave
),
3106 curr_active_slave
= rcu_dereference(bond
->curr_active_slave
);
3107 curr_arp_slave
= rcu_dereference(bond
->current_arp_slave
);
3109 /* We 'trust' the received ARP enough to validate it if:
3111 * (a) the slave receiving the ARP is active (which includes the
3112 * current ARP slave, if any), or
3114 * (b) the receiving slave isn't active, but there is a currently
3115 * active slave and it received valid arp reply(s) after it became
3116 * the currently active slave, or
3118 * (c) there is an ARP slave that sent an ARP during the prior ARP
3119 * interval, and we receive an ARP reply on any slave. We accept
3120 * these because switch FDB update delays may deliver the ARP
3121 * reply to a slave other than the sender of the ARP request.
3123 * Note: for (b), backup slaves are receiving the broadcast ARP
3124 * request, not a reply. This request passes from the sending
3125 * slave through the L2 switch(es) to the receiving slave. Since
3126 * this is checking the request, sip/tip are swapped for
3129 * This is done to avoid endless looping when we can't reach the
3130 * arp_ip_target and fool ourselves with our own arp requests.
3132 if (bond_is_active_slave(slave
))
3133 bond_validate_arp(bond
, slave
, sip
, tip
);
3134 else if (curr_active_slave
&&
3135 time_after(slave_last_rx(bond
, curr_active_slave
),
3136 curr_active_slave
->last_link_up
))
3137 bond_validate_arp(bond
, slave
, tip
, sip
);
3138 else if (curr_arp_slave
&& (arp
->ar_op
== htons(ARPOP_REPLY
)) &&
3139 bond_time_in_interval(bond
, slave_last_tx(curr_arp_slave
), 1))
3140 bond_validate_arp(bond
, slave
, sip
, tip
);
3143 if (arp
!= (struct arphdr
*)skb
->data
)
3145 return RX_HANDLER_ANOTHER
;
3148 #if IS_ENABLED(CONFIG_IPV6)
3149 static void bond_ns_send(struct slave
*slave
, const struct in6_addr
*daddr
,
3150 const struct in6_addr
*saddr
, struct bond_vlan_tag
*tags
)
3152 struct net_device
*bond_dev
= slave
->bond
->dev
;
3153 struct net_device
*slave_dev
= slave
->dev
;
3154 struct in6_addr mcaddr
;
3155 struct sk_buff
*skb
;
3157 slave_dbg(bond_dev
, slave_dev
, "NS on slave: dst %pI6c src %pI6c\n",
3160 skb
= ndisc_ns_create(slave_dev
, daddr
, saddr
, 0);
3162 net_err_ratelimited("NS packet allocation failed\n");
3166 addrconf_addr_solict_mult(daddr
, &mcaddr
);
3167 if (bond_handle_vlan(slave
, tags
, skb
)) {
3168 slave_update_last_tx(slave
);
3169 ndisc_send_skb(skb
, &mcaddr
, saddr
);
3173 static void bond_ns_send_all(struct bonding
*bond
, struct slave
*slave
)
3175 struct in6_addr
*targets
= bond
->params
.ns_targets
;
3176 struct bond_vlan_tag
*tags
;
3177 struct dst_entry
*dst
;
3178 struct in6_addr saddr
;
3182 for (i
= 0; i
< BOND_MAX_NS_TARGETS
&& !ipv6_addr_any(&targets
[i
]); i
++) {
3183 slave_dbg(bond
->dev
, slave
->dev
, "%s: target %pI6c\n",
3184 __func__
, &targets
[i
]);
3187 /* Find out through which dev should the packet go */
3188 memset(&fl6
, 0, sizeof(struct flowi6
));
3189 fl6
.daddr
= targets
[i
];
3190 fl6
.flowi6_oif
= bond
->dev
->ifindex
;
3192 dst
= ip6_route_output(dev_net(bond
->dev
), NULL
, &fl6
);
3195 /* there's no route to target - try to send arp
3196 * probe to generate any traffic (arp_validate=0)
3198 if (bond
->params
.arp_validate
)
3199 pr_warn_once("%s: no route to ns_ip6_target %pI6c and arp_validate is set\n",
3202 bond_ns_send(slave
, &targets
[i
], &in6addr_any
, tags
);
3206 /* bond device itself */
3207 if (dst
->dev
== bond
->dev
)
3211 tags
= bond_verify_device_path(bond
->dev
, dst
->dev
, 0);
3214 if (!IS_ERR_OR_NULL(tags
))
3217 /* Not our device - skip */
3218 slave_dbg(bond
->dev
, slave
->dev
, "no path to ns_ip6_target %pI6c via dst->dev %s\n",
3219 &targets
[i
], dst
->dev
? dst
->dev
->name
: "NULL");
3225 if (!ipv6_dev_get_saddr(dev_net(dst
->dev
), dst
->dev
, &targets
[i
], 0, &saddr
))
3226 bond_ns_send(slave
, &targets
[i
], &saddr
, tags
);
3228 bond_ns_send(slave
, &targets
[i
], &in6addr_any
, tags
);
3235 static int bond_confirm_addr6(struct net_device
*dev
,
3236 struct netdev_nested_priv
*priv
)
3238 struct in6_addr
*addr
= (struct in6_addr
*)priv
->data
;
3240 return ipv6_chk_addr(dev_net(dev
), addr
, dev
, 0);
3243 static bool bond_has_this_ip6(struct bonding
*bond
, struct in6_addr
*addr
)
3245 struct netdev_nested_priv priv
= {
3250 if (bond_confirm_addr6(bond
->dev
, &priv
))
3254 if (netdev_walk_all_upper_dev_rcu(bond
->dev
, bond_confirm_addr6
, &priv
))
3261 static void bond_validate_na(struct bonding
*bond
, struct slave
*slave
,
3262 struct in6_addr
*saddr
, struct in6_addr
*daddr
)
3267 * 1. Source address is unspecified address.
3268 * 2. Dest address is neither all-nodes multicast address nor
3269 * exist on bond interface.
3271 if (ipv6_addr_any(saddr
) ||
3272 (!ipv6_addr_equal(daddr
, &in6addr_linklocal_allnodes
) &&
3273 !bond_has_this_ip6(bond
, daddr
))) {
3274 slave_dbg(bond
->dev
, slave
->dev
, "%s: sip %pI6c tip %pI6c not found\n",
3275 __func__
, saddr
, daddr
);
3279 i
= bond_get_targets_ip6(bond
->params
.ns_targets
, saddr
);
3281 slave_dbg(bond
->dev
, slave
->dev
, "%s: sip %pI6c not found in targets\n",
3285 slave
->last_rx
= jiffies
;
3286 slave
->target_last_arp_rx
[i
] = jiffies
;
3289 static int bond_na_rcv(const struct sk_buff
*skb
, struct bonding
*bond
,
3290 struct slave
*slave
)
3292 struct slave
*curr_active_slave
, *curr_arp_slave
;
3293 struct in6_addr
*saddr
, *daddr
;
3296 struct icmp6hdr icmp6
;
3297 } *combined
, _combined
;
3299 if (skb
->pkt_type
== PACKET_OTHERHOST
||
3300 skb
->pkt_type
== PACKET_LOOPBACK
)
3303 combined
= skb_header_pointer(skb
, 0, sizeof(_combined
), &_combined
);
3304 if (!combined
|| combined
->ip6
.nexthdr
!= NEXTHDR_ICMP
||
3305 (combined
->icmp6
.icmp6_type
!= NDISC_NEIGHBOUR_SOLICITATION
&&
3306 combined
->icmp6
.icmp6_type
!= NDISC_NEIGHBOUR_ADVERTISEMENT
))
3309 saddr
= &combined
->ip6
.saddr
;
3310 daddr
= &combined
->ip6
.daddr
;
3312 slave_dbg(bond
->dev
, slave
->dev
, "%s: %s/%d av %d sv %d sip %pI6c tip %pI6c\n",
3313 __func__
, slave
->dev
->name
, bond_slave_state(slave
),
3314 bond
->params
.arp_validate
, slave_do_arp_validate(bond
, slave
),
3317 curr_active_slave
= rcu_dereference(bond
->curr_active_slave
);
3318 curr_arp_slave
= rcu_dereference(bond
->current_arp_slave
);
3320 /* We 'trust' the received ARP enough to validate it if:
3321 * see bond_arp_rcv().
3323 if (bond_is_active_slave(slave
))
3324 bond_validate_na(bond
, slave
, saddr
, daddr
);
3325 else if (curr_active_slave
&&
3326 time_after(slave_last_rx(bond
, curr_active_slave
),
3327 curr_active_slave
->last_link_up
))
3328 bond_validate_na(bond
, slave
, daddr
, saddr
);
3329 else if (curr_arp_slave
&&
3330 bond_time_in_interval(bond
, slave_last_tx(curr_arp_slave
), 1))
3331 bond_validate_na(bond
, slave
, saddr
, daddr
);
3334 return RX_HANDLER_ANOTHER
;
3338 int bond_rcv_validate(const struct sk_buff
*skb
, struct bonding
*bond
,
3339 struct slave
*slave
)
3341 #if IS_ENABLED(CONFIG_IPV6)
3342 bool is_ipv6
= skb
->protocol
== __cpu_to_be16(ETH_P_IPV6
);
3344 bool is_arp
= skb
->protocol
== __cpu_to_be16(ETH_P_ARP
);
3346 slave_dbg(bond
->dev
, slave
->dev
, "%s: skb->dev %s\n",
3347 __func__
, skb
->dev
->name
);
3349 /* Use arp validate logic for both ARP and NS */
3350 if (!slave_do_arp_validate(bond
, slave
)) {
3351 if ((slave_do_arp_validate_only(bond
) && is_arp
) ||
3352 #if IS_ENABLED(CONFIG_IPV6)
3353 (slave_do_arp_validate_only(bond
) && is_ipv6
) ||
3355 !slave_do_arp_validate_only(bond
))
3356 slave
->last_rx
= jiffies
;
3357 return RX_HANDLER_ANOTHER
;
3358 } else if (is_arp
) {
3359 return bond_arp_rcv(skb
, bond
, slave
);
3360 #if IS_ENABLED(CONFIG_IPV6)
3361 } else if (is_ipv6
) {
3362 return bond_na_rcv(skb
, bond
, slave
);
3365 return RX_HANDLER_ANOTHER
;
3369 static void bond_send_validate(struct bonding
*bond
, struct slave
*slave
)
3371 bond_arp_send_all(bond
, slave
);
3372 #if IS_ENABLED(CONFIG_IPV6)
3373 bond_ns_send_all(bond
, slave
);
3377 /* function to verify if we're in the arp_interval timeslice, returns true if
3378 * (last_act - arp_interval) <= jiffies <= (last_act + mod * arp_interval +
3379 * arp_interval/2) . the arp_interval/2 is needed for really fast networks.
3381 static bool bond_time_in_interval(struct bonding
*bond
, unsigned long last_act
,
3384 int delta_in_ticks
= msecs_to_jiffies(bond
->params
.arp_interval
);
3386 return time_in_range(jiffies
,
3387 last_act
- delta_in_ticks
,
3388 last_act
+ mod
* delta_in_ticks
+ delta_in_ticks
/2);
3391 /* This function is called regularly to monitor each slave's link
3392 * ensuring that traffic is being sent and received when arp monitoring
3393 * is used in load-balancing mode. if the adapter has been dormant, then an
3394 * arp is transmitted to generate traffic. see activebackup_arp_monitor for
3395 * arp monitoring in active backup mode.
3397 static void bond_loadbalance_arp_mon(struct bonding
*bond
)
3399 struct slave
*slave
, *oldcurrent
;
3400 struct list_head
*iter
;
3401 int do_failover
= 0, slave_state_changed
= 0;
3403 if (!bond_has_slaves(bond
))
3408 oldcurrent
= rcu_dereference(bond
->curr_active_slave
);
3409 /* see if any of the previous devices are up now (i.e. they have
3410 * xmt and rcv traffic). the curr_active_slave does not come into
3411 * the picture unless it is null. also, slave->last_link_up is not
3412 * needed here because we send an arp on each slave and give a slave
3413 * as long as it needs to get the tx/rx within the delta.
3414 * TODO: what about up/down delay in arp mode? it wasn't here before
3417 bond_for_each_slave_rcu(bond
, slave
, iter
) {
3418 unsigned long last_tx
= slave_last_tx(slave
);
3420 bond_propose_link_state(slave
, BOND_LINK_NOCHANGE
);
3422 if (slave
->link
!= BOND_LINK_UP
) {
3423 if (bond_time_in_interval(bond
, last_tx
, 1) &&
3424 bond_time_in_interval(bond
, slave
->last_rx
, 1)) {
3426 bond_propose_link_state(slave
, BOND_LINK_UP
);
3427 slave_state_changed
= 1;
3429 /* primary_slave has no meaning in round-robin
3430 * mode. the window of a slave being up and
3431 * curr_active_slave being null after enslaving
3435 slave_info(bond
->dev
, slave
->dev
, "link status definitely up\n");
3438 slave_info(bond
->dev
, slave
->dev
, "interface is now up\n");
3442 /* slave->link == BOND_LINK_UP */
3444 /* not all switches will respond to an arp request
3445 * when the source ip is 0, so don't take the link down
3446 * if we don't know our ip yet
3448 if (!bond_time_in_interval(bond
, last_tx
, bond
->params
.missed_max
) ||
3449 !bond_time_in_interval(bond
, slave
->last_rx
, bond
->params
.missed_max
)) {
3451 bond_propose_link_state(slave
, BOND_LINK_DOWN
);
3452 slave_state_changed
= 1;
3454 if (slave
->link_failure_count
< UINT_MAX
)
3455 slave
->link_failure_count
++;
3457 slave_info(bond
->dev
, slave
->dev
, "interface is now down\n");
3459 if (slave
== oldcurrent
)
3464 /* note: if switch is in round-robin mode, all links
3465 * must tx arp to ensure all links rx an arp - otherwise
3466 * links may oscillate or not come up at all; if switch is
3467 * in something like xor mode, there is nothing we can
3468 * do - all replies will be rx'ed on same link causing slaves
3469 * to be unstable during low/no traffic periods
3471 if (bond_slave_is_up(slave
))
3472 bond_send_validate(bond
, slave
);
3477 if (do_failover
|| slave_state_changed
) {
3478 if (!rtnl_trylock())
3481 bond_for_each_slave(bond
, slave
, iter
) {
3482 if (slave
->link_new_state
!= BOND_LINK_NOCHANGE
)
3483 slave
->link
= slave
->link_new_state
;
3486 if (slave_state_changed
) {
3487 bond_slave_state_change(bond
);
3488 if (BOND_MODE(bond
) == BOND_MODE_XOR
)
3489 bond_update_slave_arr(bond
, NULL
);
3493 bond_select_active_slave(bond
);
3494 unblock_netpoll_tx();
3500 if (bond
->params
.arp_interval
)
3501 queue_delayed_work(bond
->wq
, &bond
->arp_work
,
3502 msecs_to_jiffies(bond
->params
.arp_interval
));
3505 /* Called to inspect slaves for active-backup mode ARP monitor link state
3506 * changes. Sets proposed link state in slaves to specify what action
3507 * should take place for the slave. Returns 0 if no changes are found, >0
3508 * if changes to link states must be committed.
3510 * Called with rcu_read_lock held.
3512 static int bond_ab_arp_inspect(struct bonding
*bond
)
3514 unsigned long last_tx
, last_rx
;
3515 struct list_head
*iter
;
3516 struct slave
*slave
;
3519 bond_for_each_slave_rcu(bond
, slave
, iter
) {
3520 bond_propose_link_state(slave
, BOND_LINK_NOCHANGE
);
3521 last_rx
= slave_last_rx(bond
, slave
);
3523 if (slave
->link
!= BOND_LINK_UP
) {
3524 if (bond_time_in_interval(bond
, last_rx
, 1)) {
3525 bond_propose_link_state(slave
, BOND_LINK_UP
);
3527 } else if (slave
->link
== BOND_LINK_BACK
) {
3528 bond_propose_link_state(slave
, BOND_LINK_FAIL
);
3534 /* Give slaves 2*delta after being enslaved or made
3535 * active. This avoids bouncing, as the last receive
3536 * times need a full ARP monitor cycle to be updated.
3538 if (bond_time_in_interval(bond
, slave
->last_link_up
, 2))
3541 /* Backup slave is down if:
3542 * - No current_arp_slave AND
3543 * - more than (missed_max+1)*delta since last receive AND
3544 * - the bond has an IP address
3546 * Note: a non-null current_arp_slave indicates
3547 * the curr_active_slave went down and we are
3548 * searching for a new one; under this condition
3549 * we only take the curr_active_slave down - this
3550 * gives each slave a chance to tx/rx traffic
3551 * before being taken out
3553 if (!bond_is_active_slave(slave
) &&
3554 !rcu_access_pointer(bond
->current_arp_slave
) &&
3555 !bond_time_in_interval(bond
, last_rx
, bond
->params
.missed_max
+ 1)) {
3556 bond_propose_link_state(slave
, BOND_LINK_DOWN
);
3560 /* Active slave is down if:
3561 * - more than missed_max*delta since transmitting OR
3562 * - (more than missed_max*delta since receive AND
3563 * the bond has an IP address)
3565 last_tx
= slave_last_tx(slave
);
3566 if (bond_is_active_slave(slave
) &&
3567 (!bond_time_in_interval(bond
, last_tx
, bond
->params
.missed_max
) ||
3568 !bond_time_in_interval(bond
, last_rx
, bond
->params
.missed_max
))) {
3569 bond_propose_link_state(slave
, BOND_LINK_DOWN
);
3577 /* Called to commit link state changes noted by inspection step of
3578 * active-backup mode ARP monitor.
3580 * Called with RTNL hold.
3582 static void bond_ab_arp_commit(struct bonding
*bond
)
3584 bool do_failover
= false;
3585 struct list_head
*iter
;
3586 unsigned long last_tx
;
3587 struct slave
*slave
;
3589 bond_for_each_slave(bond
, slave
, iter
) {
3590 switch (slave
->link_new_state
) {
3591 case BOND_LINK_NOCHANGE
:
3595 last_tx
= slave_last_tx(slave
);
3596 if (rtnl_dereference(bond
->curr_active_slave
) != slave
||
3597 (!rtnl_dereference(bond
->curr_active_slave
) &&
3598 bond_time_in_interval(bond
, last_tx
, 1))) {
3599 struct slave
*current_arp_slave
;
3601 current_arp_slave
= rtnl_dereference(bond
->current_arp_slave
);
3602 bond_set_slave_link_state(slave
, BOND_LINK_UP
,
3603 BOND_SLAVE_NOTIFY_NOW
);
3604 if (current_arp_slave
) {
3605 bond_set_slave_inactive_flags(
3607 BOND_SLAVE_NOTIFY_NOW
);
3608 RCU_INIT_POINTER(bond
->current_arp_slave
, NULL
);
3611 slave_info(bond
->dev
, slave
->dev
, "link status definitely up\n");
3613 if (!rtnl_dereference(bond
->curr_active_slave
) ||
3614 slave
== rtnl_dereference(bond
->primary_slave
) ||
3615 slave
->prio
> rtnl_dereference(bond
->curr_active_slave
)->prio
)
3622 case BOND_LINK_DOWN
:
3623 if (slave
->link_failure_count
< UINT_MAX
)
3624 slave
->link_failure_count
++;
3626 bond_set_slave_link_state(slave
, BOND_LINK_DOWN
,
3627 BOND_SLAVE_NOTIFY_NOW
);
3628 bond_set_slave_inactive_flags(slave
,
3629 BOND_SLAVE_NOTIFY_NOW
);
3631 slave_info(bond
->dev
, slave
->dev
, "link status definitely down, disabling slave\n");
3633 if (slave
== rtnl_dereference(bond
->curr_active_slave
)) {
3634 RCU_INIT_POINTER(bond
->current_arp_slave
, NULL
);
3640 case BOND_LINK_FAIL
:
3641 bond_set_slave_link_state(slave
, BOND_LINK_FAIL
,
3642 BOND_SLAVE_NOTIFY_NOW
);
3643 bond_set_slave_inactive_flags(slave
,
3644 BOND_SLAVE_NOTIFY_NOW
);
3646 /* A slave has just been enslaved and has become
3647 * the current active slave.
3649 if (rtnl_dereference(bond
->curr_active_slave
))
3650 RCU_INIT_POINTER(bond
->current_arp_slave
, NULL
);
3654 slave_err(bond
->dev
, slave
->dev
,
3655 "impossible: link_new_state %d on slave\n",
3656 slave
->link_new_state
);
3663 bond_select_active_slave(bond
);
3664 unblock_netpoll_tx();
3667 bond_set_carrier(bond
);
3670 /* Send ARP probes for active-backup mode ARP monitor.
3672 * Called with rcu_read_lock held.
3674 static bool bond_ab_arp_probe(struct bonding
*bond
)
3676 struct slave
*slave
, *before
= NULL
, *new_slave
= NULL
,
3677 *curr_arp_slave
= rcu_dereference(bond
->current_arp_slave
),
3678 *curr_active_slave
= rcu_dereference(bond
->curr_active_slave
);
3679 struct list_head
*iter
;
3681 bool should_notify_rtnl
= BOND_SLAVE_NOTIFY_LATER
;
3683 if (curr_arp_slave
&& curr_active_slave
)
3684 netdev_info(bond
->dev
, "PROBE: c_arp %s && cas %s BAD\n",
3685 curr_arp_slave
->dev
->name
,
3686 curr_active_slave
->dev
->name
);
3688 if (curr_active_slave
) {
3689 bond_send_validate(bond
, curr_active_slave
);
3690 return should_notify_rtnl
;
3693 /* if we don't have a curr_active_slave, search for the next available
3694 * backup slave from the current_arp_slave and make it the candidate
3695 * for becoming the curr_active_slave
3698 if (!curr_arp_slave
) {
3699 curr_arp_slave
= bond_first_slave_rcu(bond
);
3700 if (!curr_arp_slave
)
3701 return should_notify_rtnl
;
3704 bond_for_each_slave_rcu(bond
, slave
, iter
) {
3705 if (!found
&& !before
&& bond_slave_is_up(slave
))
3708 if (found
&& !new_slave
&& bond_slave_is_up(slave
))
3710 /* if the link state is up at this point, we
3711 * mark it down - this can happen if we have
3712 * simultaneous link failures and
3713 * reselect_active_interface doesn't make this
3714 * one the current slave so it is still marked
3715 * up when it is actually down
3717 if (!bond_slave_is_up(slave
) && slave
->link
== BOND_LINK_UP
) {
3718 bond_set_slave_link_state(slave
, BOND_LINK_DOWN
,
3719 BOND_SLAVE_NOTIFY_LATER
);
3720 if (slave
->link_failure_count
< UINT_MAX
)
3721 slave
->link_failure_count
++;
3723 bond_set_slave_inactive_flags(slave
,
3724 BOND_SLAVE_NOTIFY_LATER
);
3726 slave_info(bond
->dev
, slave
->dev
, "backup interface is now down\n");
3728 if (slave
== curr_arp_slave
)
3732 if (!new_slave
&& before
)
3738 bond_set_slave_link_state(new_slave
, BOND_LINK_BACK
,
3739 BOND_SLAVE_NOTIFY_LATER
);
3740 bond_set_slave_active_flags(new_slave
, BOND_SLAVE_NOTIFY_LATER
);
3741 bond_send_validate(bond
, new_slave
);
3742 new_slave
->last_link_up
= jiffies
;
3743 rcu_assign_pointer(bond
->current_arp_slave
, new_slave
);
3746 bond_for_each_slave_rcu(bond
, slave
, iter
) {
3747 if (slave
->should_notify
|| slave
->should_notify_link
) {
3748 should_notify_rtnl
= BOND_SLAVE_NOTIFY_NOW
;
3752 return should_notify_rtnl
;
3755 static void bond_activebackup_arp_mon(struct bonding
*bond
)
3757 bool should_notify_peers
= false;
3758 bool should_notify_rtnl
= false;
3761 delta_in_ticks
= msecs_to_jiffies(bond
->params
.arp_interval
);
3763 if (!bond_has_slaves(bond
))
3768 should_notify_peers
= bond_should_notify_peers(bond
);
3770 if (bond_ab_arp_inspect(bond
)) {
3773 /* Race avoidance with bond_close flush of workqueue */
3774 if (!rtnl_trylock()) {
3776 should_notify_peers
= false;
3780 bond_ab_arp_commit(bond
);
3786 should_notify_rtnl
= bond_ab_arp_probe(bond
);
3790 if (bond
->params
.arp_interval
)
3791 queue_delayed_work(bond
->wq
, &bond
->arp_work
, delta_in_ticks
);
3793 if (should_notify_peers
|| should_notify_rtnl
) {
3794 if (!rtnl_trylock())
3797 if (should_notify_peers
) {
3798 bond
->send_peer_notif
--;
3799 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS
,
3802 if (should_notify_rtnl
) {
3803 bond_slave_state_notify(bond
);
3804 bond_slave_link_notify(bond
);
3811 static void bond_arp_monitor(struct work_struct
*work
)
3813 struct bonding
*bond
= container_of(work
, struct bonding
,
3816 if (BOND_MODE(bond
) == BOND_MODE_ACTIVEBACKUP
)
3817 bond_activebackup_arp_mon(bond
);
3819 bond_loadbalance_arp_mon(bond
);
3822 /*-------------------------- netdev event handling --------------------------*/
3824 /* Change device name */
3825 static int bond_event_changename(struct bonding
*bond
)
3827 bond_remove_proc_entry(bond
);
3828 bond_create_proc_entry(bond
);
3830 bond_debug_reregister(bond
);
3835 static int bond_master_netdev_event(unsigned long event
,
3836 struct net_device
*bond_dev
)
3838 struct bonding
*event_bond
= netdev_priv(bond_dev
);
3840 netdev_dbg(bond_dev
, "%s called\n", __func__
);
3843 case NETDEV_CHANGENAME
:
3844 return bond_event_changename(event_bond
);
3845 case NETDEV_UNREGISTER
:
3846 bond_remove_proc_entry(event_bond
);
3847 #ifdef CONFIG_XFRM_OFFLOAD
3848 xfrm_dev_state_flush(dev_net(bond_dev
), bond_dev
, true);
3849 #endif /* CONFIG_XFRM_OFFLOAD */
3851 case NETDEV_REGISTER
:
3852 bond_create_proc_entry(event_bond
);
3861 static int bond_slave_netdev_event(unsigned long event
,
3862 struct net_device
*slave_dev
)
3864 struct slave
*slave
= bond_slave_get_rtnl(slave_dev
), *primary
;
3865 struct bonding
*bond
;
3866 struct net_device
*bond_dev
;
3868 /* A netdev event can be generated while enslaving a device
3869 * before netdev_rx_handler_register is called in which case
3870 * slave will be NULL
3873 netdev_dbg(slave_dev
, "%s called on NULL slave\n", __func__
);
3877 bond_dev
= slave
->bond
->dev
;
3879 primary
= rtnl_dereference(bond
->primary_slave
);
3881 slave_dbg(bond_dev
, slave_dev
, "%s called\n", __func__
);
3884 case NETDEV_UNREGISTER
:
3885 if (bond_dev
->type
!= ARPHRD_ETHER
)
3886 bond_release_and_destroy(bond_dev
, slave_dev
);
3888 __bond_release_one(bond_dev
, slave_dev
, false, true);
3892 /* For 802.3ad mode only:
3893 * Getting invalid Speed/Duplex values here will put slave
3894 * in weird state. Mark it as link-fail if the link was
3895 * previously up or link-down if it hasn't yet come up, and
3896 * let link-monitoring (miimon) set it right when correct
3897 * speeds/duplex are available.
3899 if (bond_update_speed_duplex(slave
) &&
3900 BOND_MODE(bond
) == BOND_MODE_8023AD
) {
3901 if (slave
->last_link_up
)
3902 slave
->link
= BOND_LINK_FAIL
;
3904 slave
->link
= BOND_LINK_DOWN
;
3907 if (BOND_MODE(bond
) == BOND_MODE_8023AD
)
3908 bond_3ad_adapter_speed_duplex_changed(slave
);
3911 /* Refresh slave-array if applicable!
3912 * If the setup does not use miimon or arpmon (mode-specific!),
3913 * then these events will not cause the slave-array to be
3914 * refreshed. This will cause xmit to use a slave that is not
3915 * usable. Avoid such situation by refeshing the array at these
3916 * events. If these (miimon/arpmon) parameters are configured
3917 * then array gets refreshed twice and that should be fine!
3919 if (bond_mode_can_use_xmit_hash(bond
))
3920 bond_update_slave_arr(bond
, NULL
);
3922 case NETDEV_CHANGEMTU
:
3923 /* TODO: Should slaves be allowed to
3924 * independently alter their MTU? For
3925 * an active-backup bond, slaves need
3926 * not be the same type of device, so
3927 * MTUs may vary. For other modes,
3928 * slaves arguably should have the
3929 * same MTUs. To do this, we'd need to
3930 * take over the slave's change_mtu
3931 * function for the duration of their
3935 case NETDEV_CHANGENAME
:
3936 /* we don't care if we don't have primary set */
3937 if (!bond_uses_primary(bond
) ||
3938 !bond
->params
.primary
[0])
3941 if (slave
== primary
) {
3942 /* slave's name changed - he's no longer primary */
3943 RCU_INIT_POINTER(bond
->primary_slave
, NULL
);
3944 } else if (!strcmp(slave_dev
->name
, bond
->params
.primary
)) {
3945 /* we have a new primary slave */
3946 rcu_assign_pointer(bond
->primary_slave
, slave
);
3947 } else { /* we didn't change primary - exit */
3951 netdev_info(bond
->dev
, "Primary slave changed to %s, reselecting active slave\n",
3952 primary
? slave_dev
->name
: "none");
3955 bond_select_active_slave(bond
);
3956 unblock_netpoll_tx();
3958 case NETDEV_FEAT_CHANGE
:
3959 if (!bond
->notifier_ctx
) {
3960 bond
->notifier_ctx
= true;
3961 bond_compute_features(bond
);
3962 bond
->notifier_ctx
= false;
3965 case NETDEV_RESEND_IGMP
:
3966 /* Propagate to master device */
3967 call_netdevice_notifiers(event
, slave
->bond
->dev
);
3969 case NETDEV_XDP_FEAT_CHANGE
:
3970 bond_xdp_set_features(bond_dev
);
3979 /* bond_netdev_event: handle netdev notifier chain events.
3981 * This function receives events for the netdev chain. The caller (an
3982 * ioctl handler calling blocking_notifier_call_chain) holds the necessary
3983 * locks for us to safely manipulate the slave devices (RTNL lock,
3986 static int bond_netdev_event(struct notifier_block
*this,
3987 unsigned long event
, void *ptr
)
3989 struct net_device
*event_dev
= netdev_notifier_info_to_dev(ptr
);
3991 netdev_dbg(event_dev
, "%s received %s\n",
3992 __func__
, netdev_cmd_to_name(event
));
3994 if (!(event_dev
->priv_flags
& IFF_BONDING
))
3997 if (event_dev
->flags
& IFF_MASTER
) {
4000 ret
= bond_master_netdev_event(event
, event_dev
);
4001 if (ret
!= NOTIFY_DONE
)
4005 if (event_dev
->flags
& IFF_SLAVE
)
4006 return bond_slave_netdev_event(event
, event_dev
);
4011 static struct notifier_block bond_netdev_notifier
= {
4012 .notifier_call
= bond_netdev_event
,
4015 /*---------------------------- Hashing Policies -----------------------------*/
4017 /* Helper to access data in a packet, with or without a backing skb.
4018 * If skb is given the data is linearized if necessary via pskb_may_pull.
4020 static inline const void *bond_pull_data(struct sk_buff
*skb
,
4021 const void *data
, int hlen
, int n
)
4023 if (likely(n
<= hlen
))
4025 else if (skb
&& likely(pskb_may_pull(skb
, n
)))
4031 /* L2 hash helper */
4032 static inline u32
bond_eth_hash(struct sk_buff
*skb
, const void *data
, int mhoff
, int hlen
)
4036 data
= bond_pull_data(skb
, data
, hlen
, mhoff
+ sizeof(struct ethhdr
));
4040 ep
= (struct ethhdr
*)(data
+ mhoff
);
4041 return ep
->h_dest
[5] ^ ep
->h_source
[5] ^ be16_to_cpu(ep
->h_proto
);
4044 static bool bond_flow_ip(struct sk_buff
*skb
, struct flow_keys
*fk
, const void *data
,
4045 int hlen
, __be16 l2_proto
, int *nhoff
, int *ip_proto
, bool l34
)
4047 const struct ipv6hdr
*iph6
;
4048 const struct iphdr
*iph
;
4050 if (l2_proto
== htons(ETH_P_IP
)) {
4051 data
= bond_pull_data(skb
, data
, hlen
, *nhoff
+ sizeof(*iph
));
4055 iph
= (const struct iphdr
*)(data
+ *nhoff
);
4056 iph_to_flow_copy_v4addrs(fk
, iph
);
4057 *nhoff
+= iph
->ihl
<< 2;
4058 if (!ip_is_fragment(iph
))
4059 *ip_proto
= iph
->protocol
;
4060 } else if (l2_proto
== htons(ETH_P_IPV6
)) {
4061 data
= bond_pull_data(skb
, data
, hlen
, *nhoff
+ sizeof(*iph6
));
4065 iph6
= (const struct ipv6hdr
*)(data
+ *nhoff
);
4066 iph_to_flow_copy_v6addrs(fk
, iph6
);
4067 *nhoff
+= sizeof(*iph6
);
4068 *ip_proto
= iph6
->nexthdr
;
4073 if (l34
&& *ip_proto
>= 0)
4074 fk
->ports
.ports
= __skb_flow_get_ports(skb
, *nhoff
, *ip_proto
, data
, hlen
);
4079 static u32
bond_vlan_srcmac_hash(struct sk_buff
*skb
, const void *data
, int mhoff
, int hlen
)
4081 u32 srcmac_vendor
= 0, srcmac_dev
= 0;
4082 struct ethhdr
*mac_hdr
;
4086 data
= bond_pull_data(skb
, data
, hlen
, mhoff
+ sizeof(struct ethhdr
));
4089 mac_hdr
= (struct ethhdr
*)(data
+ mhoff
);
4091 for (i
= 0; i
< 3; i
++)
4092 srcmac_vendor
= (srcmac_vendor
<< 8) | mac_hdr
->h_source
[i
];
4094 for (i
= 3; i
< ETH_ALEN
; i
++)
4095 srcmac_dev
= (srcmac_dev
<< 8) | mac_hdr
->h_source
[i
];
4097 if (skb
&& skb_vlan_tag_present(skb
))
4098 vlan
= skb_vlan_tag_get(skb
);
4100 return vlan
^ srcmac_vendor
^ srcmac_dev
;
4103 /* Extract the appropriate headers based on bond's xmit policy */
4104 static bool bond_flow_dissect(struct bonding
*bond
, struct sk_buff
*skb
, const void *data
,
4105 __be16 l2_proto
, int nhoff
, int hlen
, struct flow_keys
*fk
)
4107 bool l34
= bond
->params
.xmit_policy
== BOND_XMIT_POLICY_LAYER34
;
4110 switch (bond
->params
.xmit_policy
) {
4111 case BOND_XMIT_POLICY_ENCAP23
:
4112 case BOND_XMIT_POLICY_ENCAP34
:
4113 memset(fk
, 0, sizeof(*fk
));
4114 return __skb_flow_dissect(NULL
, skb
, &flow_keys_bonding
,
4115 fk
, data
, l2_proto
, nhoff
, hlen
, 0);
4120 fk
->ports
.ports
= 0;
4121 memset(&fk
->icmp
, 0, sizeof(fk
->icmp
));
4122 if (!bond_flow_ip(skb
, fk
, data
, hlen
, l2_proto
, &nhoff
, &ip_proto
, l34
))
4125 /* ICMP error packets contains at least 8 bytes of the header
4126 * of the packet which generated the error. Use this information
4127 * to correlate ICMP error packets within the same flow which
4128 * generated the error.
4130 if (ip_proto
== IPPROTO_ICMP
|| ip_proto
== IPPROTO_ICMPV6
) {
4131 skb_flow_get_icmp_tci(skb
, &fk
->icmp
, data
, nhoff
, hlen
);
4132 if (ip_proto
== IPPROTO_ICMP
) {
4133 if (!icmp_is_err(fk
->icmp
.type
))
4136 nhoff
+= sizeof(struct icmphdr
);
4137 } else if (ip_proto
== IPPROTO_ICMPV6
) {
4138 if (!icmpv6_is_err(fk
->icmp
.type
))
4141 nhoff
+= sizeof(struct icmp6hdr
);
4143 return bond_flow_ip(skb
, fk
, data
, hlen
, l2_proto
, &nhoff
, &ip_proto
, l34
);
4149 static u32
bond_ip_hash(u32 hash
, struct flow_keys
*flow
, int xmit_policy
)
4151 hash
^= (__force u32
)flow_get_u32_dst(flow
) ^
4152 (__force u32
)flow_get_u32_src(flow
);
4153 hash
^= (hash
>> 16);
4154 hash
^= (hash
>> 8);
4156 /* discard lowest hash bit to deal with the common even ports pattern */
4157 if (xmit_policy
== BOND_XMIT_POLICY_LAYER34
||
4158 xmit_policy
== BOND_XMIT_POLICY_ENCAP34
)
4164 /* Generate hash based on xmit policy. If @skb is given it is used to linearize
4165 * the data as required, but this function can be used without it if the data is
4166 * known to be linear (e.g. with xdp_buff).
4168 static u32
__bond_xmit_hash(struct bonding
*bond
, struct sk_buff
*skb
, const void *data
,
4169 __be16 l2_proto
, int mhoff
, int nhoff
, int hlen
)
4171 struct flow_keys flow
;
4174 if (bond
->params
.xmit_policy
== BOND_XMIT_POLICY_VLAN_SRCMAC
)
4175 return bond_vlan_srcmac_hash(skb
, data
, mhoff
, hlen
);
4177 if (bond
->params
.xmit_policy
== BOND_XMIT_POLICY_LAYER2
||
4178 !bond_flow_dissect(bond
, skb
, data
, l2_proto
, nhoff
, hlen
, &flow
))
4179 return bond_eth_hash(skb
, data
, mhoff
, hlen
);
4181 if (bond
->params
.xmit_policy
== BOND_XMIT_POLICY_LAYER23
||
4182 bond
->params
.xmit_policy
== BOND_XMIT_POLICY_ENCAP23
) {
4183 hash
= bond_eth_hash(skb
, data
, mhoff
, hlen
);
4186 memcpy(&hash
, &flow
.icmp
, sizeof(hash
));
4188 memcpy(&hash
, &flow
.ports
.ports
, sizeof(hash
));
4191 return bond_ip_hash(hash
, &flow
, bond
->params
.xmit_policy
);
4195 * bond_xmit_hash - generate a hash value based on the xmit policy
4196 * @bond: bonding device
4197 * @skb: buffer to use for headers
4199 * This function will extract the necessary headers from the skb buffer and use
4200 * them to generate a hash based on the xmit_policy set in the bonding device
4202 u32
bond_xmit_hash(struct bonding
*bond
, struct sk_buff
*skb
)
4204 if (bond
->params
.xmit_policy
== BOND_XMIT_POLICY_ENCAP34
&&
4208 return __bond_xmit_hash(bond
, skb
, skb
->data
, skb
->protocol
,
4209 0, skb_network_offset(skb
),
4214 * bond_xmit_hash_xdp - generate a hash value based on the xmit policy
4215 * @bond: bonding device
4216 * @xdp: buffer to use for headers
4218 * The XDP variant of bond_xmit_hash.
4220 static u32
bond_xmit_hash_xdp(struct bonding
*bond
, struct xdp_buff
*xdp
)
4224 if (xdp
->data
+ sizeof(struct ethhdr
) > xdp
->data_end
)
4227 eth
= (struct ethhdr
*)xdp
->data
;
4229 return __bond_xmit_hash(bond
, NULL
, xdp
->data
, eth
->h_proto
, 0,
4230 sizeof(struct ethhdr
), xdp
->data_end
- xdp
->data
);
4233 /*-------------------------- Device entry points ----------------------------*/
4235 void bond_work_init_all(struct bonding
*bond
)
4237 INIT_DELAYED_WORK(&bond
->mcast_work
,
4238 bond_resend_igmp_join_requests_delayed
);
4239 INIT_DELAYED_WORK(&bond
->alb_work
, bond_alb_monitor
);
4240 INIT_DELAYED_WORK(&bond
->mii_work
, bond_mii_monitor
);
4241 INIT_DELAYED_WORK(&bond
->arp_work
, bond_arp_monitor
);
4242 INIT_DELAYED_WORK(&bond
->ad_work
, bond_3ad_state_machine_handler
);
4243 INIT_DELAYED_WORK(&bond
->slave_arr_work
, bond_slave_arr_handler
);
4246 static void bond_work_cancel_all(struct bonding
*bond
)
4248 cancel_delayed_work_sync(&bond
->mii_work
);
4249 cancel_delayed_work_sync(&bond
->arp_work
);
4250 cancel_delayed_work_sync(&bond
->alb_work
);
4251 cancel_delayed_work_sync(&bond
->ad_work
);
4252 cancel_delayed_work_sync(&bond
->mcast_work
);
4253 cancel_delayed_work_sync(&bond
->slave_arr_work
);
4256 static int bond_open(struct net_device
*bond_dev
)
4258 struct bonding
*bond
= netdev_priv(bond_dev
);
4259 struct list_head
*iter
;
4260 struct slave
*slave
;
4262 if (BOND_MODE(bond
) == BOND_MODE_ROUNDROBIN
&& !bond
->rr_tx_counter
) {
4263 bond
->rr_tx_counter
= alloc_percpu(u32
);
4264 if (!bond
->rr_tx_counter
)
4268 /* reset slave->backup and slave->inactive */
4269 if (bond_has_slaves(bond
)) {
4270 bond_for_each_slave(bond
, slave
, iter
) {
4271 if (bond_uses_primary(bond
) &&
4272 slave
!= rcu_access_pointer(bond
->curr_active_slave
)) {
4273 bond_set_slave_inactive_flags(slave
,
4274 BOND_SLAVE_NOTIFY_NOW
);
4275 } else if (BOND_MODE(bond
) != BOND_MODE_8023AD
) {
4276 bond_set_slave_active_flags(slave
,
4277 BOND_SLAVE_NOTIFY_NOW
);
4282 if (bond_is_lb(bond
)) {
4283 /* bond_alb_initialize must be called before the timer
4286 if (bond_alb_initialize(bond
, (BOND_MODE(bond
) == BOND_MODE_ALB
)))
4288 if (bond
->params
.tlb_dynamic_lb
|| BOND_MODE(bond
) == BOND_MODE_ALB
)
4289 queue_delayed_work(bond
->wq
, &bond
->alb_work
, 0);
4292 if (bond
->params
.miimon
) /* link check interval, in milliseconds. */
4293 queue_delayed_work(bond
->wq
, &bond
->mii_work
, 0);
4295 if (bond
->params
.arp_interval
) { /* arp interval, in milliseconds. */
4296 queue_delayed_work(bond
->wq
, &bond
->arp_work
, 0);
4297 bond
->recv_probe
= bond_rcv_validate
;
4300 if (BOND_MODE(bond
) == BOND_MODE_8023AD
) {
4301 queue_delayed_work(bond
->wq
, &bond
->ad_work
, 0);
4302 /* register to receive LACPDUs */
4303 bond
->recv_probe
= bond_3ad_lacpdu_recv
;
4304 bond_3ad_initiate_agg_selection(bond
, 1);
4306 bond_for_each_slave(bond
, slave
, iter
)
4307 dev_mc_add(slave
->dev
, lacpdu_mcast_addr
);
4310 if (bond_mode_can_use_xmit_hash(bond
))
4311 bond_update_slave_arr(bond
, NULL
);
4316 static int bond_close(struct net_device
*bond_dev
)
4318 struct bonding
*bond
= netdev_priv(bond_dev
);
4319 struct slave
*slave
;
4321 bond_work_cancel_all(bond
);
4322 bond
->send_peer_notif
= 0;
4323 if (bond_is_lb(bond
))
4324 bond_alb_deinitialize(bond
);
4325 bond
->recv_probe
= NULL
;
4327 if (bond_uses_primary(bond
)) {
4329 slave
= rcu_dereference(bond
->curr_active_slave
);
4331 bond_hw_addr_flush(bond_dev
, slave
->dev
);
4334 struct list_head
*iter
;
4336 bond_for_each_slave(bond
, slave
, iter
)
4337 bond_hw_addr_flush(bond_dev
, slave
->dev
);
4343 /* fold stats, assuming all rtnl_link_stats64 fields are u64, but
4344 * that some drivers can provide 32bit values only.
4346 static void bond_fold_stats(struct rtnl_link_stats64
*_res
,
4347 const struct rtnl_link_stats64
*_new
,
4348 const struct rtnl_link_stats64
*_old
)
4350 const u64
*new = (const u64
*)_new
;
4351 const u64
*old
= (const u64
*)_old
;
4352 u64
*res
= (u64
*)_res
;
4355 for (i
= 0; i
< sizeof(*_res
) / sizeof(u64
); i
++) {
4358 s64 delta
= nv
- ov
;
4360 /* detects if this particular field is 32bit only */
4361 if (((nv
| ov
) >> 32) == 0)
4362 delta
= (s64
)(s32
)((u32
)nv
- (u32
)ov
);
4364 /* filter anomalies, some drivers reset their stats
4365 * at down/up events.
4372 #ifdef CONFIG_LOCKDEP
4373 static int bond_get_lowest_level_rcu(struct net_device
*dev
)
4375 struct net_device
*ldev
, *next
, *now
, *dev_stack
[MAX_NEST_DEV
+ 1];
4376 struct list_head
*niter
, *iter
, *iter_stack
[MAX_NEST_DEV
+ 1];
4377 int cur
= 0, max
= 0;
4380 iter
= &dev
->adj_list
.lower
;
4385 ldev
= netdev_next_lower_dev_rcu(now
, &iter
);
4390 niter
= &ldev
->adj_list
.lower
;
4391 dev_stack
[cur
] = now
;
4392 iter_stack
[cur
++] = iter
;
4401 next
= dev_stack
[--cur
];
4402 niter
= iter_stack
[cur
];
4413 static void bond_get_stats(struct net_device
*bond_dev
,
4414 struct rtnl_link_stats64
*stats
)
4416 struct bonding
*bond
= netdev_priv(bond_dev
);
4417 struct rtnl_link_stats64 temp
;
4418 struct list_head
*iter
;
4419 struct slave
*slave
;
4424 #ifdef CONFIG_LOCKDEP
4425 nest_level
= bond_get_lowest_level_rcu(bond_dev
);
4428 spin_lock_nested(&bond
->stats_lock
, nest_level
);
4429 memcpy(stats
, &bond
->bond_stats
, sizeof(*stats
));
4431 bond_for_each_slave_rcu(bond
, slave
, iter
) {
4432 const struct rtnl_link_stats64
*new =
4433 dev_get_stats(slave
->dev
, &temp
);
4435 bond_fold_stats(stats
, new, &slave
->slave_stats
);
4437 /* save off the slave stats for the next run */
4438 memcpy(&slave
->slave_stats
, new, sizeof(*new));
4441 memcpy(&bond
->bond_stats
, stats
, sizeof(*stats
));
4442 spin_unlock(&bond
->stats_lock
);
4446 static int bond_eth_ioctl(struct net_device
*bond_dev
, struct ifreq
*ifr
, int cmd
)
4448 struct bonding
*bond
= netdev_priv(bond_dev
);
4449 struct mii_ioctl_data
*mii
= NULL
;
4451 netdev_dbg(bond_dev
, "bond_eth_ioctl: cmd=%d\n", cmd
);
4462 /* We do this again just in case we were called by SIOCGMIIREG
4463 * instead of SIOCGMIIPHY.
4469 if (mii
->reg_num
== 1) {
4471 if (netif_carrier_ok(bond
->dev
))
4472 mii
->val_out
= BMSR_LSTATUS
;
4483 static int bond_do_ioctl(struct net_device
*bond_dev
, struct ifreq
*ifr
, int cmd
)
4485 struct bonding
*bond
= netdev_priv(bond_dev
);
4486 struct net_device
*slave_dev
= NULL
;
4487 struct ifbond k_binfo
;
4488 struct ifbond __user
*u_binfo
= NULL
;
4489 struct ifslave k_sinfo
;
4490 struct ifslave __user
*u_sinfo
= NULL
;
4491 struct bond_opt_value newval
;
4495 netdev_dbg(bond_dev
, "bond_ioctl: cmd=%d\n", cmd
);
4498 case SIOCBONDINFOQUERY
:
4499 u_binfo
= (struct ifbond __user
*)ifr
->ifr_data
;
4501 if (copy_from_user(&k_binfo
, u_binfo
, sizeof(ifbond
)))
4504 bond_info_query(bond_dev
, &k_binfo
);
4505 if (copy_to_user(u_binfo
, &k_binfo
, sizeof(ifbond
)))
4509 case SIOCBONDSLAVEINFOQUERY
:
4510 u_sinfo
= (struct ifslave __user
*)ifr
->ifr_data
;
4512 if (copy_from_user(&k_sinfo
, u_sinfo
, sizeof(ifslave
)))
4515 res
= bond_slave_info_query(bond_dev
, &k_sinfo
);
4517 copy_to_user(u_sinfo
, &k_sinfo
, sizeof(ifslave
)))
4525 net
= dev_net(bond_dev
);
4527 if (!ns_capable(net
->user_ns
, CAP_NET_ADMIN
))
4530 slave_dev
= __dev_get_by_name(net
, ifr
->ifr_slave
);
4532 slave_dbg(bond_dev
, slave_dev
, "slave_dev=%p:\n", slave_dev
);
4538 case SIOCBONDENSLAVE
:
4539 res
= bond_enslave(bond_dev
, slave_dev
, NULL
);
4541 case SIOCBONDRELEASE
:
4542 res
= bond_release(bond_dev
, slave_dev
);
4544 case SIOCBONDSETHWADDR
:
4545 res
= bond_set_dev_addr(bond_dev
, slave_dev
);
4547 case SIOCBONDCHANGEACTIVE
:
4548 bond_opt_initstr(&newval
, slave_dev
->name
);
4549 res
= __bond_opt_set_notify(bond
, BOND_OPT_ACTIVE_SLAVE
,
4559 static int bond_siocdevprivate(struct net_device
*bond_dev
, struct ifreq
*ifr
,
4560 void __user
*data
, int cmd
)
4562 struct ifreq ifrdata
= { .ifr_data
= data
};
4565 case BOND_INFO_QUERY_OLD
:
4566 return bond_do_ioctl(bond_dev
, &ifrdata
, SIOCBONDINFOQUERY
);
4567 case BOND_SLAVE_INFO_QUERY_OLD
:
4568 return bond_do_ioctl(bond_dev
, &ifrdata
, SIOCBONDSLAVEINFOQUERY
);
4569 case BOND_ENSLAVE_OLD
:
4570 return bond_do_ioctl(bond_dev
, ifr
, SIOCBONDENSLAVE
);
4571 case BOND_RELEASE_OLD
:
4572 return bond_do_ioctl(bond_dev
, ifr
, SIOCBONDRELEASE
);
4573 case BOND_SETHWADDR_OLD
:
4574 return bond_do_ioctl(bond_dev
, ifr
, SIOCBONDSETHWADDR
);
4575 case BOND_CHANGE_ACTIVE_OLD
:
4576 return bond_do_ioctl(bond_dev
, ifr
, SIOCBONDCHANGEACTIVE
);
4582 static void bond_change_rx_flags(struct net_device
*bond_dev
, int change
)
4584 struct bonding
*bond
= netdev_priv(bond_dev
);
4586 if (change
& IFF_PROMISC
)
4587 bond_set_promiscuity(bond
,
4588 bond_dev
->flags
& IFF_PROMISC
? 1 : -1);
4590 if (change
& IFF_ALLMULTI
)
4591 bond_set_allmulti(bond
,
4592 bond_dev
->flags
& IFF_ALLMULTI
? 1 : -1);
4595 static void bond_set_rx_mode(struct net_device
*bond_dev
)
4597 struct bonding
*bond
= netdev_priv(bond_dev
);
4598 struct list_head
*iter
;
4599 struct slave
*slave
;
4602 if (bond_uses_primary(bond
)) {
4603 slave
= rcu_dereference(bond
->curr_active_slave
);
4605 dev_uc_sync(slave
->dev
, bond_dev
);
4606 dev_mc_sync(slave
->dev
, bond_dev
);
4609 bond_for_each_slave_rcu(bond
, slave
, iter
) {
4610 dev_uc_sync_multiple(slave
->dev
, bond_dev
);
4611 dev_mc_sync_multiple(slave
->dev
, bond_dev
);
4617 static int bond_neigh_init(struct neighbour
*n
)
4619 struct bonding
*bond
= netdev_priv(n
->dev
);
4620 const struct net_device_ops
*slave_ops
;
4621 struct neigh_parms parms
;
4622 struct slave
*slave
;
4626 slave
= bond_first_slave_rcu(bond
);
4629 slave_ops
= slave
->dev
->netdev_ops
;
4630 if (!slave_ops
->ndo_neigh_setup
)
4633 /* TODO: find another way [1] to implement this.
4634 * Passing a zeroed structure is fragile,
4635 * but at least we do not pass garbage.
4637 * [1] One way would be that ndo_neigh_setup() never touch
4638 * struct neigh_parms, but propagate the new neigh_setup()
4639 * back to ___neigh_create() / neigh_parms_alloc()
4641 memset(&parms
, 0, sizeof(parms
));
4642 ret
= slave_ops
->ndo_neigh_setup(slave
->dev
, &parms
);
4647 if (parms
.neigh_setup
)
4648 ret
= parms
.neigh_setup(n
);
4654 /* The bonding ndo_neigh_setup is called at init time beofre any
4655 * slave exists. So we must declare proxy setup function which will
4656 * be used at run time to resolve the actual slave neigh param setup.
4658 * It's also called by master devices (such as vlans) to setup their
4659 * underlying devices. In that case - do nothing, we're already set up from
4662 static int bond_neigh_setup(struct net_device
*dev
,
4663 struct neigh_parms
*parms
)
4665 /* modify only our neigh_parms */
4666 if (parms
->dev
== dev
)
4667 parms
->neigh_setup
= bond_neigh_init
;
4672 /* Change the MTU of all of a master's slaves to match the master */
4673 static int bond_change_mtu(struct net_device
*bond_dev
, int new_mtu
)
4675 struct bonding
*bond
= netdev_priv(bond_dev
);
4676 struct slave
*slave
, *rollback_slave
;
4677 struct list_head
*iter
;
4680 netdev_dbg(bond_dev
, "bond=%p, new_mtu=%d\n", bond
, new_mtu
);
4682 bond_for_each_slave(bond
, slave
, iter
) {
4683 slave_dbg(bond_dev
, slave
->dev
, "s %p c_m %p\n",
4684 slave
, slave
->dev
->netdev_ops
->ndo_change_mtu
);
4686 res
= dev_set_mtu(slave
->dev
, new_mtu
);
4689 /* If we failed to set the slave's mtu to the new value
4690 * we must abort the operation even in ACTIVE_BACKUP
4691 * mode, because if we allow the backup slaves to have
4692 * different mtu values than the active slave we'll
4693 * need to change their mtu when doing a failover. That
4694 * means changing their mtu from timer context, which
4695 * is probably not a good idea.
4697 slave_dbg(bond_dev
, slave
->dev
, "err %d setting mtu to %d\n",
4703 bond_dev
->mtu
= new_mtu
;
4708 /* unwind from head to the slave that failed */
4709 bond_for_each_slave(bond
, rollback_slave
, iter
) {
4712 if (rollback_slave
== slave
)
4715 tmp_res
= dev_set_mtu(rollback_slave
->dev
, bond_dev
->mtu
);
4717 slave_dbg(bond_dev
, rollback_slave
->dev
, "unwind err %d\n",
4724 /* Change HW address
4726 * Note that many devices must be down to change the HW address, and
4727 * downing the master releases all slaves. We can make bonds full of
4728 * bonding devices to test this, however.
4730 static int bond_set_mac_address(struct net_device
*bond_dev
, void *addr
)
4732 struct bonding
*bond
= netdev_priv(bond_dev
);
4733 struct slave
*slave
, *rollback_slave
;
4734 struct sockaddr_storage
*ss
= addr
, tmp_ss
;
4735 struct list_head
*iter
;
4738 if (BOND_MODE(bond
) == BOND_MODE_ALB
)
4739 return bond_alb_set_mac_address(bond_dev
, addr
);
4742 netdev_dbg(bond_dev
, "%s: bond=%p\n", __func__
, bond
);
4744 /* If fail_over_mac is enabled, do nothing and return success.
4745 * Returning an error causes ifenslave to fail.
4747 if (bond
->params
.fail_over_mac
&&
4748 BOND_MODE(bond
) == BOND_MODE_ACTIVEBACKUP
)
4751 if (!is_valid_ether_addr(ss
->__data
))
4752 return -EADDRNOTAVAIL
;
4754 bond_for_each_slave(bond
, slave
, iter
) {
4755 slave_dbg(bond_dev
, slave
->dev
, "%s: slave=%p\n",
4757 res
= dev_set_mac_address(slave
->dev
, addr
, NULL
);
4759 /* TODO: consider downing the slave
4761 * User should expect communications
4762 * breakage anyway until ARP finish
4765 slave_dbg(bond_dev
, slave
->dev
, "%s: err %d\n",
4772 dev_addr_set(bond_dev
, ss
->__data
);
4776 memcpy(tmp_ss
.__data
, bond_dev
->dev_addr
, bond_dev
->addr_len
);
4777 tmp_ss
.ss_family
= bond_dev
->type
;
4779 /* unwind from head to the slave that failed */
4780 bond_for_each_slave(bond
, rollback_slave
, iter
) {
4783 if (rollback_slave
== slave
)
4786 tmp_res
= dev_set_mac_address(rollback_slave
->dev
,
4787 (struct sockaddr
*)&tmp_ss
, NULL
);
4789 slave_dbg(bond_dev
, rollback_slave
->dev
, "%s: unwind err %d\n",
4798 * bond_get_slave_by_id - get xmit slave with slave_id
4799 * @bond: bonding device that is transmitting
4800 * @slave_id: slave id up to slave_cnt-1 through which to transmit
4802 * This function tries to get slave with slave_id but in case
4803 * it fails, it tries to find the first available slave for transmission.
4805 static struct slave
*bond_get_slave_by_id(struct bonding
*bond
,
4808 struct list_head
*iter
;
4809 struct slave
*slave
;
4812 /* Here we start from the slave with slave_id */
4813 bond_for_each_slave_rcu(bond
, slave
, iter
) {
4815 if (bond_slave_can_tx(slave
))
4820 /* Here we start from the first slave up to slave_id */
4822 bond_for_each_slave_rcu(bond
, slave
, iter
) {
4825 if (bond_slave_can_tx(slave
))
4828 /* no slave that can tx has been found */
4833 * bond_rr_gen_slave_id - generate slave id based on packets_per_slave
4834 * @bond: bonding device to use
4836 * Based on the value of the bonding device's packets_per_slave parameter
4837 * this function generates a slave id, which is usually used as the next
4838 * slave to transmit through.
4840 static u32
bond_rr_gen_slave_id(struct bonding
*bond
)
4843 struct reciprocal_value reciprocal_packets_per_slave
;
4844 int packets_per_slave
= bond
->params
.packets_per_slave
;
4846 switch (packets_per_slave
) {
4848 slave_id
= get_random_u32();
4851 slave_id
= this_cpu_inc_return(*bond
->rr_tx_counter
);
4854 reciprocal_packets_per_slave
=
4855 bond
->params
.reciprocal_packets_per_slave
;
4856 slave_id
= this_cpu_inc_return(*bond
->rr_tx_counter
);
4857 slave_id
= reciprocal_divide(slave_id
,
4858 reciprocal_packets_per_slave
);
4865 static struct slave
*bond_xmit_roundrobin_slave_get(struct bonding
*bond
,
4866 struct sk_buff
*skb
)
4868 struct slave
*slave
;
4872 /* Start with the curr_active_slave that joined the bond as the
4873 * default for sending IGMP traffic. For failover purposes one
4874 * needs to maintain some consistency for the interface that will
4875 * send the join/membership reports. The curr_active_slave found
4876 * will send all of this type of traffic.
4878 if (skb
->protocol
== htons(ETH_P_IP
)) {
4879 int noff
= skb_network_offset(skb
);
4882 if (unlikely(!pskb_may_pull(skb
, noff
+ sizeof(*iph
))))
4886 if (iph
->protocol
== IPPROTO_IGMP
) {
4887 slave
= rcu_dereference(bond
->curr_active_slave
);
4890 return bond_get_slave_by_id(bond
, 0);
4895 slave_cnt
= READ_ONCE(bond
->slave_cnt
);
4896 if (likely(slave_cnt
)) {
4897 slave_id
= bond_rr_gen_slave_id(bond
) % slave_cnt
;
4898 return bond_get_slave_by_id(bond
, slave_id
);
4903 static struct slave
*bond_xdp_xmit_roundrobin_slave_get(struct bonding
*bond
,
4904 struct xdp_buff
*xdp
)
4906 struct slave
*slave
;
4909 const struct ethhdr
*eth
;
4910 void *data
= xdp
->data
;
4912 if (data
+ sizeof(struct ethhdr
) > xdp
->data_end
)
4915 eth
= (struct ethhdr
*)data
;
4916 data
+= sizeof(struct ethhdr
);
4918 /* See comment on IGMP in bond_xmit_roundrobin_slave_get() */
4919 if (eth
->h_proto
== htons(ETH_P_IP
)) {
4920 const struct iphdr
*iph
;
4922 if (data
+ sizeof(struct iphdr
) > xdp
->data_end
)
4925 iph
= (struct iphdr
*)data
;
4927 if (iph
->protocol
== IPPROTO_IGMP
) {
4928 slave
= rcu_dereference(bond
->curr_active_slave
);
4931 return bond_get_slave_by_id(bond
, 0);
4936 slave_cnt
= READ_ONCE(bond
->slave_cnt
);
4937 if (likely(slave_cnt
)) {
4938 slave_id
= bond_rr_gen_slave_id(bond
) % slave_cnt
;
4939 return bond_get_slave_by_id(bond
, slave_id
);
4944 static netdev_tx_t
bond_xmit_roundrobin(struct sk_buff
*skb
,
4945 struct net_device
*bond_dev
)
4947 struct bonding
*bond
= netdev_priv(bond_dev
);
4948 struct slave
*slave
;
4950 slave
= bond_xmit_roundrobin_slave_get(bond
, skb
);
4952 return bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
4954 return bond_tx_drop(bond_dev
, skb
);
4957 static struct slave
*bond_xmit_activebackup_slave_get(struct bonding
*bond
)
4959 return rcu_dereference(bond
->curr_active_slave
);
4962 /* In active-backup mode, we know that bond->curr_active_slave is always valid if
4963 * the bond has a usable interface.
4965 static netdev_tx_t
bond_xmit_activebackup(struct sk_buff
*skb
,
4966 struct net_device
*bond_dev
)
4968 struct bonding
*bond
= netdev_priv(bond_dev
);
4969 struct slave
*slave
;
4971 slave
= bond_xmit_activebackup_slave_get(bond
);
4973 return bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
4975 return bond_tx_drop(bond_dev
, skb
);
4978 /* Use this to update slave_array when (a) it's not appropriate to update
4979 * slave_array right away (note that update_slave_array() may sleep)
4980 * and / or (b) RTNL is not held.
4982 void bond_slave_arr_work_rearm(struct bonding
*bond
, unsigned long delay
)
4984 queue_delayed_work(bond
->wq
, &bond
->slave_arr_work
, delay
);
4987 /* Slave array work handler. Holds only RTNL */
4988 static void bond_slave_arr_handler(struct work_struct
*work
)
4990 struct bonding
*bond
= container_of(work
, struct bonding
,
4991 slave_arr_work
.work
);
4994 if (!rtnl_trylock())
4997 ret
= bond_update_slave_arr(bond
, NULL
);
5000 pr_warn_ratelimited("Failed to update slave array from WT\n");
5006 bond_slave_arr_work_rearm(bond
, 1);
5009 static void bond_skip_slave(struct bond_up_slave
*slaves
,
5010 struct slave
*skipslave
)
5014 /* Rare situation where caller has asked to skip a specific
5015 * slave but allocation failed (most likely!). BTW this is
5016 * only possible when the call is initiated from
5017 * __bond_release_one(). In this situation; overwrite the
5018 * skipslave entry in the array with the last entry from the
5019 * array to avoid a situation where the xmit path may choose
5020 * this to-be-skipped slave to send a packet out.
5022 for (idx
= 0; slaves
&& idx
< slaves
->count
; idx
++) {
5023 if (skipslave
== slaves
->arr
[idx
]) {
5025 slaves
->arr
[slaves
->count
- 1];
5032 static void bond_set_slave_arr(struct bonding
*bond
,
5033 struct bond_up_slave
*usable_slaves
,
5034 struct bond_up_slave
*all_slaves
)
5036 struct bond_up_slave
*usable
, *all
;
5038 usable
= rtnl_dereference(bond
->usable_slaves
);
5039 rcu_assign_pointer(bond
->usable_slaves
, usable_slaves
);
5040 kfree_rcu(usable
, rcu
);
5042 all
= rtnl_dereference(bond
->all_slaves
);
5043 rcu_assign_pointer(bond
->all_slaves
, all_slaves
);
5044 kfree_rcu(all
, rcu
);
5047 static void bond_reset_slave_arr(struct bonding
*bond
)
5049 bond_set_slave_arr(bond
, NULL
, NULL
);
5052 /* Build the usable slaves array in control path for modes that use xmit-hash
5053 * to determine the slave interface -
5054 * (a) BOND_MODE_8023AD
5056 * (c) (BOND_MODE_TLB || BOND_MODE_ALB) && tlb_dynamic_lb == 0
5058 * The caller is expected to hold RTNL only and NO other lock!
5060 int bond_update_slave_arr(struct bonding
*bond
, struct slave
*skipslave
)
5062 struct bond_up_slave
*usable_slaves
= NULL
, *all_slaves
= NULL
;
5063 struct slave
*slave
;
5064 struct list_head
*iter
;
5070 usable_slaves
= kzalloc(struct_size(usable_slaves
, arr
,
5071 bond
->slave_cnt
), GFP_KERNEL
);
5072 all_slaves
= kzalloc(struct_size(all_slaves
, arr
,
5073 bond
->slave_cnt
), GFP_KERNEL
);
5074 if (!usable_slaves
|| !all_slaves
) {
5078 if (BOND_MODE(bond
) == BOND_MODE_8023AD
) {
5079 struct ad_info ad_info
;
5081 spin_lock_bh(&bond
->mode_lock
);
5082 if (bond_3ad_get_active_agg_info(bond
, &ad_info
)) {
5083 spin_unlock_bh(&bond
->mode_lock
);
5084 pr_debug("bond_3ad_get_active_agg_info failed\n");
5085 /* No active aggragator means it's not safe to use
5086 * the previous array.
5088 bond_reset_slave_arr(bond
);
5091 spin_unlock_bh(&bond
->mode_lock
);
5092 agg_id
= ad_info
.aggregator_id
;
5094 bond_for_each_slave(bond
, slave
, iter
) {
5095 if (skipslave
== slave
)
5098 all_slaves
->arr
[all_slaves
->count
++] = slave
;
5099 if (BOND_MODE(bond
) == BOND_MODE_8023AD
) {
5100 struct aggregator
*agg
;
5102 agg
= SLAVE_AD_INFO(slave
)->port
.aggregator
;
5103 if (!agg
|| agg
->aggregator_identifier
!= agg_id
)
5106 if (!bond_slave_can_tx(slave
))
5109 slave_dbg(bond
->dev
, slave
->dev
, "Adding slave to tx hash array[%d]\n",
5110 usable_slaves
->count
);
5112 usable_slaves
->arr
[usable_slaves
->count
++] = slave
;
5115 bond_set_slave_arr(bond
, usable_slaves
, all_slaves
);
5118 if (ret
!= 0 && skipslave
) {
5119 bond_skip_slave(rtnl_dereference(bond
->all_slaves
),
5121 bond_skip_slave(rtnl_dereference(bond
->usable_slaves
),
5124 kfree_rcu(all_slaves
, rcu
);
5125 kfree_rcu(usable_slaves
, rcu
);
5130 static struct slave
*bond_xmit_3ad_xor_slave_get(struct bonding
*bond
,
5131 struct sk_buff
*skb
,
5132 struct bond_up_slave
*slaves
)
5134 struct slave
*slave
;
5138 hash
= bond_xmit_hash(bond
, skb
);
5139 count
= slaves
? READ_ONCE(slaves
->count
) : 0;
5140 if (unlikely(!count
))
5143 slave
= slaves
->arr
[hash
% count
];
5147 static struct slave
*bond_xdp_xmit_3ad_xor_slave_get(struct bonding
*bond
,
5148 struct xdp_buff
*xdp
)
5150 struct bond_up_slave
*slaves
;
5154 hash
= bond_xmit_hash_xdp(bond
, xdp
);
5155 slaves
= rcu_dereference(bond
->usable_slaves
);
5156 count
= slaves
? READ_ONCE(slaves
->count
) : 0;
5157 if (unlikely(!count
))
5160 return slaves
->arr
[hash
% count
];
5163 /* Use this Xmit function for 3AD as well as XOR modes. The current
5164 * usable slave array is formed in the control path. The xmit function
5165 * just calculates hash and sends the packet out.
5167 static netdev_tx_t
bond_3ad_xor_xmit(struct sk_buff
*skb
,
5168 struct net_device
*dev
)
5170 struct bonding
*bond
= netdev_priv(dev
);
5171 struct bond_up_slave
*slaves
;
5172 struct slave
*slave
;
5174 slaves
= rcu_dereference(bond
->usable_slaves
);
5175 slave
= bond_xmit_3ad_xor_slave_get(bond
, skb
, slaves
);
5177 return bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
5179 return bond_tx_drop(dev
, skb
);
5182 /* in broadcast mode, we send everything to all usable interfaces. */
5183 static netdev_tx_t
bond_xmit_broadcast(struct sk_buff
*skb
,
5184 struct net_device
*bond_dev
)
5186 struct bonding
*bond
= netdev_priv(bond_dev
);
5187 struct slave
*slave
= NULL
;
5188 struct list_head
*iter
;
5189 bool xmit_suc
= false;
5190 bool skb_used
= false;
5192 bond_for_each_slave_rcu(bond
, slave
, iter
) {
5193 struct sk_buff
*skb2
;
5195 if (!(bond_slave_is_up(slave
) && slave
->link
== BOND_LINK_UP
))
5198 if (bond_is_last_slave(bond
, slave
)) {
5202 skb2
= skb_clone(skb
, GFP_ATOMIC
);
5204 net_err_ratelimited("%s: Error: %s: skb_clone() failed\n",
5205 bond_dev
->name
, __func__
);
5210 if (bond_dev_queue_xmit(bond
, skb2
, slave
->dev
) == NETDEV_TX_OK
)
5215 dev_kfree_skb_any(skb
);
5218 return NETDEV_TX_OK
;
5220 dev_core_stats_tx_dropped_inc(bond_dev
);
5221 return NET_XMIT_DROP
;
5224 /*------------------------- Device initialization ---------------------------*/
5226 /* Lookup the slave that corresponds to a qid */
5227 static inline int bond_slave_override(struct bonding
*bond
,
5228 struct sk_buff
*skb
)
5230 struct slave
*slave
= NULL
;
5231 struct list_head
*iter
;
5233 if (!skb_rx_queue_recorded(skb
))
5236 /* Find out if any slaves have the same mapping as this skb. */
5237 bond_for_each_slave_rcu(bond
, slave
, iter
) {
5238 if (slave
->queue_id
== skb_get_queue_mapping(skb
)) {
5239 if (bond_slave_is_up(slave
) &&
5240 slave
->link
== BOND_LINK_UP
) {
5241 bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
5244 /* If the slave isn't UP, use default transmit policy. */
5253 static u16
bond_select_queue(struct net_device
*dev
, struct sk_buff
*skb
,
5254 struct net_device
*sb_dev
)
5256 /* This helper function exists to help dev_pick_tx get the correct
5257 * destination queue. Using a helper function skips a call to
5258 * skb_tx_hash and will put the skbs in the queue we expect on their
5259 * way down to the bonding driver.
5261 u16 txq
= skb_rx_queue_recorded(skb
) ? skb_get_rx_queue(skb
) : 0;
5263 /* Save the original txq to restore before passing to the driver */
5264 qdisc_skb_cb(skb
)->slave_dev_queue_mapping
= skb_get_queue_mapping(skb
);
5266 if (unlikely(txq
>= dev
->real_num_tx_queues
)) {
5268 txq
-= dev
->real_num_tx_queues
;
5269 } while (txq
>= dev
->real_num_tx_queues
);
5274 static struct net_device
*bond_xmit_get_slave(struct net_device
*master_dev
,
5275 struct sk_buff
*skb
,
5278 struct bonding
*bond
= netdev_priv(master_dev
);
5279 struct bond_up_slave
*slaves
;
5280 struct slave
*slave
= NULL
;
5282 switch (BOND_MODE(bond
)) {
5283 case BOND_MODE_ROUNDROBIN
:
5284 slave
= bond_xmit_roundrobin_slave_get(bond
, skb
);
5286 case BOND_MODE_ACTIVEBACKUP
:
5287 slave
= bond_xmit_activebackup_slave_get(bond
);
5289 case BOND_MODE_8023AD
:
5292 slaves
= rcu_dereference(bond
->all_slaves
);
5294 slaves
= rcu_dereference(bond
->usable_slaves
);
5295 slave
= bond_xmit_3ad_xor_slave_get(bond
, skb
, slaves
);
5297 case BOND_MODE_BROADCAST
:
5300 slave
= bond_xmit_alb_slave_get(bond
, skb
);
5303 slave
= bond_xmit_tlb_slave_get(bond
, skb
);
5306 /* Should never happen, mode already checked */
5307 WARN_ONCE(true, "Unknown bonding mode");
5316 static void bond_sk_to_flow(struct sock
*sk
, struct flow_keys
*flow
)
5318 switch (sk
->sk_family
) {
5319 #if IS_ENABLED(CONFIG_IPV6)
5321 if (ipv6_only_sock(sk
) ||
5322 ipv6_addr_type(&sk
->sk_v6_daddr
) != IPV6_ADDR_MAPPED
) {
5323 flow
->control
.addr_type
= FLOW_DISSECTOR_KEY_IPV6_ADDRS
;
5324 flow
->addrs
.v6addrs
.src
= inet6_sk(sk
)->saddr
;
5325 flow
->addrs
.v6addrs
.dst
= sk
->sk_v6_daddr
;
5330 default: /* AF_INET */
5331 flow
->control
.addr_type
= FLOW_DISSECTOR_KEY_IPV4_ADDRS
;
5332 flow
->addrs
.v4addrs
.src
= inet_sk(sk
)->inet_rcv_saddr
;
5333 flow
->addrs
.v4addrs
.dst
= inet_sk(sk
)->inet_daddr
;
5337 flow
->ports
.src
= inet_sk(sk
)->inet_sport
;
5338 flow
->ports
.dst
= inet_sk(sk
)->inet_dport
;
5342 * bond_sk_hash_l34 - generate a hash value based on the socket's L3 and L4 fields
5343 * @sk: socket to use for headers
5345 * This function will extract the necessary field from the socket and use
5346 * them to generate a hash based on the LAYER34 xmit_policy.
5347 * Assumes that sk is a TCP or UDP socket.
5349 static u32
bond_sk_hash_l34(struct sock
*sk
)
5351 struct flow_keys flow
;
5354 bond_sk_to_flow(sk
, &flow
);
5357 memcpy(&hash
, &flow
.ports
.ports
, sizeof(hash
));
5359 return bond_ip_hash(hash
, &flow
, BOND_XMIT_POLICY_LAYER34
);
5362 static struct net_device
*__bond_sk_get_lower_dev(struct bonding
*bond
,
5365 struct bond_up_slave
*slaves
;
5366 struct slave
*slave
;
5370 slaves
= rcu_dereference(bond
->usable_slaves
);
5371 count
= slaves
? READ_ONCE(slaves
->count
) : 0;
5372 if (unlikely(!count
))
5375 hash
= bond_sk_hash_l34(sk
);
5376 slave
= slaves
->arr
[hash
% count
];
5381 static struct net_device
*bond_sk_get_lower_dev(struct net_device
*dev
,
5384 struct bonding
*bond
= netdev_priv(dev
);
5385 struct net_device
*lower
= NULL
;
5388 if (bond_sk_check(bond
))
5389 lower
= __bond_sk_get_lower_dev(bond
, sk
);
5395 #if IS_ENABLED(CONFIG_TLS_DEVICE)
5396 static netdev_tx_t
bond_tls_device_xmit(struct bonding
*bond
, struct sk_buff
*skb
,
5397 struct net_device
*dev
)
5399 struct net_device
*tls_netdev
= rcu_dereference(tls_get_ctx(skb
->sk
)->netdev
);
5401 /* tls_netdev might become NULL, even if tls_is_skb_tx_device_offloaded
5402 * was true, if tls_device_down is running in parallel, but it's OK,
5403 * because bond_get_slave_by_dev has a NULL check.
5405 if (likely(bond_get_slave_by_dev(bond
, tls_netdev
)))
5406 return bond_dev_queue_xmit(bond
, skb
, tls_netdev
);
5407 return bond_tx_drop(dev
, skb
);
5411 static netdev_tx_t
__bond_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
5413 struct bonding
*bond
= netdev_priv(dev
);
5415 if (bond_should_override_tx_queue(bond
) &&
5416 !bond_slave_override(bond
, skb
))
5417 return NETDEV_TX_OK
;
5419 #if IS_ENABLED(CONFIG_TLS_DEVICE)
5420 if (tls_is_skb_tx_device_offloaded(skb
))
5421 return bond_tls_device_xmit(bond
, skb
, dev
);
5424 switch (BOND_MODE(bond
)) {
5425 case BOND_MODE_ROUNDROBIN
:
5426 return bond_xmit_roundrobin(skb
, dev
);
5427 case BOND_MODE_ACTIVEBACKUP
:
5428 return bond_xmit_activebackup(skb
, dev
);
5429 case BOND_MODE_8023AD
:
5431 return bond_3ad_xor_xmit(skb
, dev
);
5432 case BOND_MODE_BROADCAST
:
5433 return bond_xmit_broadcast(skb
, dev
);
5435 return bond_alb_xmit(skb
, dev
);
5437 return bond_tlb_xmit(skb
, dev
);
5439 /* Should never happen, mode already checked */
5440 netdev_err(dev
, "Unknown bonding mode %d\n", BOND_MODE(bond
));
5442 return bond_tx_drop(dev
, skb
);
5446 static netdev_tx_t
bond_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
5448 struct bonding
*bond
= netdev_priv(dev
);
5449 netdev_tx_t ret
= NETDEV_TX_OK
;
5451 /* If we risk deadlock from transmitting this in the
5452 * netpoll path, tell netpoll to queue the frame for later tx
5454 if (unlikely(is_netpoll_tx_blocked(dev
)))
5455 return NETDEV_TX_BUSY
;
5458 if (bond_has_slaves(bond
))
5459 ret
= __bond_start_xmit(skb
, dev
);
5461 ret
= bond_tx_drop(dev
, skb
);
5467 static struct net_device
*
5468 bond_xdp_get_xmit_slave(struct net_device
*bond_dev
, struct xdp_buff
*xdp
)
5470 struct bonding
*bond
= netdev_priv(bond_dev
);
5471 struct slave
*slave
;
5473 /* Caller needs to hold rcu_read_lock() */
5475 switch (BOND_MODE(bond
)) {
5476 case BOND_MODE_ROUNDROBIN
:
5477 slave
= bond_xdp_xmit_roundrobin_slave_get(bond
, xdp
);
5480 case BOND_MODE_ACTIVEBACKUP
:
5481 slave
= bond_xmit_activebackup_slave_get(bond
);
5484 case BOND_MODE_8023AD
:
5486 slave
= bond_xdp_xmit_3ad_xor_slave_get(bond
, xdp
);
5490 /* Should never happen. Mode guarded by bond_xdp_check() */
5491 netdev_err(bond_dev
, "Unknown bonding mode %d for xdp xmit\n", BOND_MODE(bond
));
5502 static int bond_xdp_xmit(struct net_device
*bond_dev
,
5503 int n
, struct xdp_frame
**frames
, u32 flags
)
5505 int nxmit
, err
= -ENXIO
;
5509 for (nxmit
= 0; nxmit
< n
; nxmit
++) {
5510 struct xdp_frame
*frame
= frames
[nxmit
];
5511 struct xdp_frame
*frames1
[] = {frame
};
5512 struct net_device
*slave_dev
;
5513 struct xdp_buff xdp
;
5515 xdp_convert_frame_to_buff(frame
, &xdp
);
5517 slave_dev
= bond_xdp_get_xmit_slave(bond_dev
, &xdp
);
5523 err
= slave_dev
->netdev_ops
->ndo_xdp_xmit(slave_dev
, 1, frames1
, flags
);
5530 /* If error happened on the first frame then we can pass the error up, otherwise
5531 * report the number of frames that were xmitted.
5534 return (nxmit
== 0 ? err
: nxmit
);
5539 static int bond_xdp_set(struct net_device
*dev
, struct bpf_prog
*prog
,
5540 struct netlink_ext_ack
*extack
)
5542 struct bonding
*bond
= netdev_priv(dev
);
5543 struct list_head
*iter
;
5544 struct slave
*slave
, *rollback_slave
;
5545 struct bpf_prog
*old_prog
;
5546 struct netdev_bpf xdp
= {
5547 .command
= XDP_SETUP_PROG
,
5556 if (!bond_xdp_check(bond
))
5559 old_prog
= bond
->xdp_prog
;
5560 bond
->xdp_prog
= prog
;
5562 bond_for_each_slave(bond
, slave
, iter
) {
5563 struct net_device
*slave_dev
= slave
->dev
;
5565 if (!slave_dev
->netdev_ops
->ndo_bpf
||
5566 !slave_dev
->netdev_ops
->ndo_xdp_xmit
) {
5567 SLAVE_NL_ERR(dev
, slave_dev
, extack
,
5568 "Slave device does not support XDP");
5573 if (dev_xdp_prog_count(slave_dev
) > 0) {
5574 SLAVE_NL_ERR(dev
, slave_dev
, extack
,
5575 "Slave has XDP program loaded, please unload before enslaving");
5580 err
= slave_dev
->netdev_ops
->ndo_bpf(slave_dev
, &xdp
);
5582 /* ndo_bpf() sets extack error message */
5583 slave_err(dev
, slave_dev
, "Error %d calling ndo_bpf\n", err
);
5591 static_branch_inc(&bpf_master_redirect_enabled_key
);
5592 } else if (old_prog
) {
5593 bpf_prog_put(old_prog
);
5594 static_branch_dec(&bpf_master_redirect_enabled_key
);
5600 /* unwind the program changes */
5601 bond
->xdp_prog
= old_prog
;
5602 xdp
.prog
= old_prog
;
5603 xdp
.extack
= NULL
; /* do not overwrite original error */
5605 bond_for_each_slave(bond
, rollback_slave
, iter
) {
5606 struct net_device
*slave_dev
= rollback_slave
->dev
;
5609 if (slave
== rollback_slave
)
5612 err_unwind
= slave_dev
->netdev_ops
->ndo_bpf(slave_dev
, &xdp
);
5614 slave_err(dev
, slave_dev
,
5615 "Error %d when unwinding XDP program change\n", err_unwind
);
5617 bpf_prog_inc(xdp
.prog
);
5622 static int bond_xdp(struct net_device
*dev
, struct netdev_bpf
*xdp
)
5624 switch (xdp
->command
) {
5625 case XDP_SETUP_PROG
:
5626 return bond_xdp_set(dev
, xdp
->prog
, xdp
->extack
);
5632 static u32
bond_mode_bcast_speed(struct slave
*slave
, u32 speed
)
5634 if (speed
== 0 || speed
== SPEED_UNKNOWN
)
5635 speed
= slave
->speed
;
5637 speed
= min(speed
, slave
->speed
);
5642 /* Set the BOND_PHC_INDEX flag to notify user space */
5643 static int bond_set_phc_index_flag(struct kernel_hwtstamp_config
*kernel_cfg
)
5645 struct ifreq
*ifr
= kernel_cfg
->ifr
;
5646 struct hwtstamp_config cfg
;
5648 if (kernel_cfg
->copied_to_user
) {
5649 /* Lower device has a legacy implementation */
5650 if (copy_from_user(&cfg
, ifr
->ifr_data
, sizeof(cfg
)))
5653 cfg
.flags
|= HWTSTAMP_FLAG_BONDED_PHC_INDEX
;
5654 if (copy_to_user(ifr
->ifr_data
, &cfg
, sizeof(cfg
)))
5657 kernel_cfg
->flags
|= HWTSTAMP_FLAG_BONDED_PHC_INDEX
;
5663 static int bond_hwtstamp_get(struct net_device
*dev
,
5664 struct kernel_hwtstamp_config
*cfg
)
5666 struct bonding
*bond
= netdev_priv(dev
);
5667 struct net_device
*real_dev
;
5670 real_dev
= bond_option_active_slave_get_rcu(bond
);
5674 err
= generic_hwtstamp_get_lower(real_dev
, cfg
);
5678 return bond_set_phc_index_flag(cfg
);
5681 static int bond_hwtstamp_set(struct net_device
*dev
,
5682 struct kernel_hwtstamp_config
*cfg
,
5683 struct netlink_ext_ack
*extack
)
5685 struct bonding
*bond
= netdev_priv(dev
);
5686 struct net_device
*real_dev
;
5689 if (!(cfg
->flags
& HWTSTAMP_FLAG_BONDED_PHC_INDEX
))
5692 real_dev
= bond_option_active_slave_get_rcu(bond
);
5696 err
= generic_hwtstamp_set_lower(real_dev
, cfg
, extack
);
5700 return bond_set_phc_index_flag(cfg
);
5703 static int bond_ethtool_get_link_ksettings(struct net_device
*bond_dev
,
5704 struct ethtool_link_ksettings
*cmd
)
5706 struct bonding
*bond
= netdev_priv(bond_dev
);
5707 struct list_head
*iter
;
5708 struct slave
*slave
;
5711 cmd
->base
.duplex
= DUPLEX_UNKNOWN
;
5712 cmd
->base
.port
= PORT_OTHER
;
5714 /* Since bond_slave_can_tx returns false for all inactive or down slaves, we
5715 * do not need to check mode. Though link speed might not represent
5716 * the true receive or transmit bandwidth (not all modes are symmetric)
5717 * this is an accurate maximum.
5719 bond_for_each_slave(bond
, slave
, iter
) {
5720 if (bond_slave_can_tx(slave
)) {
5721 bond_update_speed_duplex(slave
);
5722 if (slave
->speed
!= SPEED_UNKNOWN
) {
5723 if (BOND_MODE(bond
) == BOND_MODE_BROADCAST
)
5724 speed
= bond_mode_bcast_speed(slave
,
5727 speed
+= slave
->speed
;
5729 if (cmd
->base
.duplex
== DUPLEX_UNKNOWN
&&
5730 slave
->duplex
!= DUPLEX_UNKNOWN
)
5731 cmd
->base
.duplex
= slave
->duplex
;
5734 cmd
->base
.speed
= speed
? : SPEED_UNKNOWN
;
5739 static void bond_ethtool_get_drvinfo(struct net_device
*bond_dev
,
5740 struct ethtool_drvinfo
*drvinfo
)
5742 strscpy(drvinfo
->driver
, DRV_NAME
, sizeof(drvinfo
->driver
));
5743 snprintf(drvinfo
->fw_version
, sizeof(drvinfo
->fw_version
), "%d",
5747 static int bond_ethtool_get_ts_info(struct net_device
*bond_dev
,
5748 struct ethtool_ts_info
*info
)
5750 struct bonding
*bond
= netdev_priv(bond_dev
);
5751 struct ethtool_ts_info ts_info
;
5752 const struct ethtool_ops
*ops
;
5753 struct net_device
*real_dev
;
5754 bool sw_tx_support
= false;
5755 struct phy_device
*phydev
;
5756 struct list_head
*iter
;
5757 struct slave
*slave
;
5761 real_dev
= bond_option_active_slave_get_rcu(bond
);
5766 ops
= real_dev
->ethtool_ops
;
5767 phydev
= real_dev
->phydev
;
5769 if (phy_has_tsinfo(phydev
)) {
5770 ret
= phy_ts_info(phydev
, info
);
5772 } else if (ops
->get_ts_info
) {
5773 ret
= ops
->get_ts_info(real_dev
, info
);
5777 /* Check if all slaves support software tx timestamping */
5779 bond_for_each_slave_rcu(bond
, slave
, iter
) {
5781 ops
= slave
->dev
->ethtool_ops
;
5782 phydev
= slave
->dev
->phydev
;
5784 if (phy_has_tsinfo(phydev
))
5785 ret
= phy_ts_info(phydev
, &ts_info
);
5786 else if (ops
->get_ts_info
)
5787 ret
= ops
->get_ts_info(slave
->dev
, &ts_info
);
5789 if (!ret
&& (ts_info
.so_timestamping
& SOF_TIMESTAMPING_TX_SOFTWARE
)) {
5790 sw_tx_support
= true;
5794 sw_tx_support
= false;
5801 info
->so_timestamping
= SOF_TIMESTAMPING_RX_SOFTWARE
|
5802 SOF_TIMESTAMPING_SOFTWARE
;
5804 info
->so_timestamping
|= SOF_TIMESTAMPING_TX_SOFTWARE
;
5806 info
->phc_index
= -1;
5813 static const struct ethtool_ops bond_ethtool_ops
= {
5814 .get_drvinfo
= bond_ethtool_get_drvinfo
,
5815 .get_link
= ethtool_op_get_link
,
5816 .get_link_ksettings
= bond_ethtool_get_link_ksettings
,
5817 .get_ts_info
= bond_ethtool_get_ts_info
,
5820 static const struct net_device_ops bond_netdev_ops
= {
5821 .ndo_init
= bond_init
,
5822 .ndo_uninit
= bond_uninit
,
5823 .ndo_open
= bond_open
,
5824 .ndo_stop
= bond_close
,
5825 .ndo_start_xmit
= bond_start_xmit
,
5826 .ndo_select_queue
= bond_select_queue
,
5827 .ndo_get_stats64
= bond_get_stats
,
5828 .ndo_eth_ioctl
= bond_eth_ioctl
,
5829 .ndo_siocbond
= bond_do_ioctl
,
5830 .ndo_siocdevprivate
= bond_siocdevprivate
,
5831 .ndo_change_rx_flags
= bond_change_rx_flags
,
5832 .ndo_set_rx_mode
= bond_set_rx_mode
,
5833 .ndo_change_mtu
= bond_change_mtu
,
5834 .ndo_set_mac_address
= bond_set_mac_address
,
5835 .ndo_neigh_setup
= bond_neigh_setup
,
5836 .ndo_vlan_rx_add_vid
= bond_vlan_rx_add_vid
,
5837 .ndo_vlan_rx_kill_vid
= bond_vlan_rx_kill_vid
,
5838 #ifdef CONFIG_NET_POLL_CONTROLLER
5839 .ndo_netpoll_setup
= bond_netpoll_setup
,
5840 .ndo_netpoll_cleanup
= bond_netpoll_cleanup
,
5841 .ndo_poll_controller
= bond_poll_controller
,
5843 .ndo_add_slave
= bond_enslave
,
5844 .ndo_del_slave
= bond_release
,
5845 .ndo_fix_features
= bond_fix_features
,
5846 .ndo_features_check
= passthru_features_check
,
5847 .ndo_get_xmit_slave
= bond_xmit_get_slave
,
5848 .ndo_sk_get_lower_dev
= bond_sk_get_lower_dev
,
5849 .ndo_bpf
= bond_xdp
,
5850 .ndo_xdp_xmit
= bond_xdp_xmit
,
5851 .ndo_xdp_get_xmit_slave
= bond_xdp_get_xmit_slave
,
5852 .ndo_hwtstamp_get
= bond_hwtstamp_get
,
5853 .ndo_hwtstamp_set
= bond_hwtstamp_set
,
5856 static const struct device_type bond_type
= {
5860 static void bond_destructor(struct net_device
*bond_dev
)
5862 struct bonding
*bond
= netdev_priv(bond_dev
);
5865 destroy_workqueue(bond
->wq
);
5867 free_percpu(bond
->rr_tx_counter
);
5870 void bond_setup(struct net_device
*bond_dev
)
5872 struct bonding
*bond
= netdev_priv(bond_dev
);
5874 spin_lock_init(&bond
->mode_lock
);
5875 bond
->params
= bonding_defaults
;
5877 /* Initialize pointers */
5878 bond
->dev
= bond_dev
;
5880 /* Initialize the device entry points */
5881 ether_setup(bond_dev
);
5882 bond_dev
->max_mtu
= ETH_MAX_MTU
;
5883 bond_dev
->netdev_ops
= &bond_netdev_ops
;
5884 bond_dev
->ethtool_ops
= &bond_ethtool_ops
;
5886 bond_dev
->needs_free_netdev
= true;
5887 bond_dev
->priv_destructor
= bond_destructor
;
5889 SET_NETDEV_DEVTYPE(bond_dev
, &bond_type
);
5891 /* Initialize the device options */
5892 bond_dev
->flags
|= IFF_MASTER
;
5893 bond_dev
->priv_flags
|= IFF_BONDING
| IFF_UNICAST_FLT
| IFF_NO_QUEUE
;
5894 bond_dev
->priv_flags
&= ~(IFF_XMIT_DST_RELEASE
| IFF_TX_SKB_SHARING
);
5896 #ifdef CONFIG_XFRM_OFFLOAD
5897 /* set up xfrm device ops (only supported in active-backup right now) */
5898 bond_dev
->xfrmdev_ops
= &bond_xfrmdev_ops
;
5899 INIT_LIST_HEAD(&bond
->ipsec_list
);
5900 spin_lock_init(&bond
->ipsec_lock
);
5901 #endif /* CONFIG_XFRM_OFFLOAD */
5903 /* don't acquire bond device's netif_tx_lock when transmitting */
5904 bond_dev
->features
|= NETIF_F_LLTX
;
5906 /* By default, we declare the bond to be fully
5907 * VLAN hardware accelerated capable. Special
5908 * care is taken in the various xmit functions
5909 * when there are slaves that are not hw accel
5913 /* Don't allow bond devices to change network namespaces. */
5914 bond_dev
->features
|= NETIF_F_NETNS_LOCAL
;
5916 bond_dev
->hw_features
= BOND_VLAN_FEATURES
|
5917 NETIF_F_HW_VLAN_CTAG_RX
|
5918 NETIF_F_HW_VLAN_CTAG_FILTER
|
5919 NETIF_F_HW_VLAN_STAG_RX
|
5920 NETIF_F_HW_VLAN_STAG_FILTER
;
5922 bond_dev
->hw_features
|= NETIF_F_GSO_ENCAP_ALL
;
5923 bond_dev
->features
|= bond_dev
->hw_features
;
5924 bond_dev
->features
|= NETIF_F_HW_VLAN_CTAG_TX
| NETIF_F_HW_VLAN_STAG_TX
;
5925 #ifdef CONFIG_XFRM_OFFLOAD
5926 bond_dev
->hw_features
|= BOND_XFRM_FEATURES
;
5927 /* Only enable XFRM features if this is an active-backup config */
5928 if (BOND_MODE(bond
) == BOND_MODE_ACTIVEBACKUP
)
5929 bond_dev
->features
|= BOND_XFRM_FEATURES
;
5930 #endif /* CONFIG_XFRM_OFFLOAD */
5932 if (bond_xdp_check(bond
))
5933 bond_dev
->xdp_features
= NETDEV_XDP_ACT_MASK
;
5936 /* Destroy a bonding device.
5937 * Must be under rtnl_lock when this function is called.
5939 static void bond_uninit(struct net_device
*bond_dev
)
5941 struct bonding
*bond
= netdev_priv(bond_dev
);
5942 struct list_head
*iter
;
5943 struct slave
*slave
;
5945 bond_netpoll_cleanup(bond_dev
);
5947 /* Release the bonded slaves */
5948 bond_for_each_slave(bond
, slave
, iter
)
5949 __bond_release_one(bond_dev
, slave
->dev
, true, true);
5950 netdev_info(bond_dev
, "Released all slaves\n");
5952 bond_set_slave_arr(bond
, NULL
, NULL
);
5954 list_del(&bond
->bond_list
);
5956 bond_debug_unregister(bond
);
5959 /*------------------------- Module initialization ---------------------------*/
5961 static int __init
bond_check_params(struct bond_params
*params
)
5963 int arp_validate_value
, fail_over_mac_value
, primary_reselect_value
, i
;
5964 struct bond_opt_value newval
;
5965 const struct bond_opt_value
*valptr
;
5966 int arp_all_targets_value
= 0;
5967 u16 ad_actor_sys_prio
= 0;
5968 u16 ad_user_port_key
= 0;
5969 __be32 arp_target
[BOND_MAX_ARP_TARGETS
] = { 0 };
5971 int bond_mode
= BOND_MODE_ROUNDROBIN
;
5972 int xmit_hashtype
= BOND_XMIT_POLICY_LAYER2
;
5976 /* Convert string parameters. */
5978 bond_opt_initstr(&newval
, mode
);
5979 valptr
= bond_opt_parse(bond_opt_get(BOND_OPT_MODE
), &newval
);
5981 pr_err("Error: Invalid bonding mode \"%s\"\n", mode
);
5984 bond_mode
= valptr
->value
;
5987 if (xmit_hash_policy
) {
5988 if (bond_mode
== BOND_MODE_ROUNDROBIN
||
5989 bond_mode
== BOND_MODE_ACTIVEBACKUP
||
5990 bond_mode
== BOND_MODE_BROADCAST
) {
5991 pr_info("xmit_hash_policy param is irrelevant in mode %s\n",
5992 bond_mode_name(bond_mode
));
5994 bond_opt_initstr(&newval
, xmit_hash_policy
);
5995 valptr
= bond_opt_parse(bond_opt_get(BOND_OPT_XMIT_HASH
),
5998 pr_err("Error: Invalid xmit_hash_policy \"%s\"\n",
6002 xmit_hashtype
= valptr
->value
;
6007 if (bond_mode
!= BOND_MODE_8023AD
) {
6008 pr_info("lacp_rate param is irrelevant in mode %s\n",
6009 bond_mode_name(bond_mode
));
6011 bond_opt_initstr(&newval
, lacp_rate
);
6012 valptr
= bond_opt_parse(bond_opt_get(BOND_OPT_LACP_RATE
),
6015 pr_err("Error: Invalid lacp rate \"%s\"\n",
6019 lacp_fast
= valptr
->value
;
6024 bond_opt_initstr(&newval
, ad_select
);
6025 valptr
= bond_opt_parse(bond_opt_get(BOND_OPT_AD_SELECT
),
6028 pr_err("Error: Invalid ad_select \"%s\"\n", ad_select
);
6031 params
->ad_select
= valptr
->value
;
6032 if (bond_mode
!= BOND_MODE_8023AD
)
6033 pr_warn("ad_select param only affects 802.3ad mode\n");
6035 params
->ad_select
= BOND_AD_STABLE
;
6038 if (max_bonds
< 0) {
6039 pr_warn("Warning: max_bonds (%d) not in range %d-%d, so it was reset to BOND_DEFAULT_MAX_BONDS (%d)\n",
6040 max_bonds
, 0, INT_MAX
, BOND_DEFAULT_MAX_BONDS
);
6041 max_bonds
= BOND_DEFAULT_MAX_BONDS
;
6045 pr_warn("Warning: miimon module parameter (%d), not in range 0-%d, so it was reset to 0\n",
6051 pr_warn("Warning: updelay module parameter (%d), not in range 0-%d, so it was reset to 0\n",
6056 if (downdelay
< 0) {
6057 pr_warn("Warning: downdelay module parameter (%d), not in range 0-%d, so it was reset to 0\n",
6058 downdelay
, INT_MAX
);
6062 if ((use_carrier
!= 0) && (use_carrier
!= 1)) {
6063 pr_warn("Warning: use_carrier module parameter (%d), not of valid value (0/1), so it was set to 1\n",
6068 if (num_peer_notif
< 0 || num_peer_notif
> 255) {
6069 pr_warn("Warning: num_grat_arp/num_unsol_na (%d) not in range 0-255 so it was reset to 1\n",
6074 /* reset values for 802.3ad/TLB/ALB */
6075 if (!bond_mode_uses_arp(bond_mode
)) {
6077 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");
6078 pr_warn("Forcing miimon to 100msec\n");
6079 miimon
= BOND_DEFAULT_MIIMON
;
6083 if (tx_queues
< 1 || tx_queues
> 255) {
6084 pr_warn("Warning: tx_queues (%d) should be between 1 and 255, resetting to %d\n",
6085 tx_queues
, BOND_DEFAULT_TX_QUEUES
);
6086 tx_queues
= BOND_DEFAULT_TX_QUEUES
;
6089 if ((all_slaves_active
!= 0) && (all_slaves_active
!= 1)) {
6090 pr_warn("Warning: all_slaves_active module parameter (%d), not of valid value (0/1), so it was set to 0\n",
6092 all_slaves_active
= 0;
6095 if (resend_igmp
< 0 || resend_igmp
> 255) {
6096 pr_warn("Warning: resend_igmp (%d) should be between 0 and 255, resetting to %d\n",
6097 resend_igmp
, BOND_DEFAULT_RESEND_IGMP
);
6098 resend_igmp
= BOND_DEFAULT_RESEND_IGMP
;
6101 bond_opt_initval(&newval
, packets_per_slave
);
6102 if (!bond_opt_parse(bond_opt_get(BOND_OPT_PACKETS_PER_SLAVE
), &newval
)) {
6103 pr_warn("Warning: packets_per_slave (%d) should be between 0 and %u resetting to 1\n",
6104 packets_per_slave
, USHRT_MAX
);
6105 packets_per_slave
= 1;
6108 if (bond_mode
== BOND_MODE_ALB
) {
6109 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",
6114 if (updelay
|| downdelay
) {
6115 /* just warn the user the up/down delay will have
6116 * no effect since miimon is zero...
6118 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",
6119 updelay
, downdelay
);
6122 /* don't allow arp monitoring */
6124 pr_warn("Warning: miimon (%d) and arp_interval (%d) can't be used simultaneously, disabling ARP monitoring\n",
6125 miimon
, arp_interval
);
6129 if ((updelay
% miimon
) != 0) {
6130 pr_warn("Warning: updelay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
6131 updelay
, miimon
, (updelay
/ miimon
) * miimon
);
6136 if ((downdelay
% miimon
) != 0) {
6137 pr_warn("Warning: downdelay (%d) is not a multiple of miimon (%d), downdelay rounded to %d ms\n",
6139 (downdelay
/ miimon
) * miimon
);
6142 downdelay
/= miimon
;
6145 if (arp_interval
< 0) {
6146 pr_warn("Warning: arp_interval module parameter (%d), not in range 0-%d, so it was reset to 0\n",
6147 arp_interval
, INT_MAX
);
6151 for (arp_ip_count
= 0, i
= 0;
6152 (arp_ip_count
< BOND_MAX_ARP_TARGETS
) && arp_ip_target
[i
]; i
++) {
6155 /* not a complete check, but good enough to catch mistakes */
6156 if (!in4_pton(arp_ip_target
[i
], -1, (u8
*)&ip
, -1, NULL
) ||
6157 !bond_is_ip_target_ok(ip
)) {
6158 pr_warn("Warning: bad arp_ip_target module parameter (%s), ARP monitoring will not be performed\n",
6162 if (bond_get_targets_ip(arp_target
, ip
) == -1)
6163 arp_target
[arp_ip_count
++] = ip
;
6165 pr_warn("Warning: duplicate address %pI4 in arp_ip_target, skipping\n",
6170 if (arp_interval
&& !arp_ip_count
) {
6171 /* don't allow arping if no arp_ip_target given... */
6172 pr_warn("Warning: arp_interval module parameter (%d) specified without providing an arp_ip_target parameter, arp_interval was reset to 0\n",
6178 if (!arp_interval
) {
6179 pr_err("arp_validate requires arp_interval\n");
6183 bond_opt_initstr(&newval
, arp_validate
);
6184 valptr
= bond_opt_parse(bond_opt_get(BOND_OPT_ARP_VALIDATE
),
6187 pr_err("Error: invalid arp_validate \"%s\"\n",
6191 arp_validate_value
= valptr
->value
;
6193 arp_validate_value
= 0;
6196 if (arp_all_targets
) {
6197 bond_opt_initstr(&newval
, arp_all_targets
);
6198 valptr
= bond_opt_parse(bond_opt_get(BOND_OPT_ARP_ALL_TARGETS
),
6201 pr_err("Error: invalid arp_all_targets_value \"%s\"\n",
6203 arp_all_targets_value
= 0;
6205 arp_all_targets_value
= valptr
->value
;
6210 pr_info("MII link monitoring set to %d ms\n", miimon
);
6211 } else if (arp_interval
) {
6212 valptr
= bond_opt_get_val(BOND_OPT_ARP_VALIDATE
,
6213 arp_validate_value
);
6214 pr_info("ARP monitoring set to %d ms, validate %s, with %d target(s):",
6215 arp_interval
, valptr
->string
, arp_ip_count
);
6217 for (i
= 0; i
< arp_ip_count
; i
++)
6218 pr_cont(" %s", arp_ip_target
[i
]);
6222 } else if (max_bonds
) {
6223 /* miimon and arp_interval not set, we need one so things
6224 * work as expected, see bonding.txt for details
6226 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");
6229 if (primary
&& !bond_mode_uses_primary(bond_mode
)) {
6230 /* currently, using a primary only makes sense
6231 * in active backup, TLB or ALB modes
6233 pr_warn("Warning: %s primary device specified but has no effect in %s mode\n",
6234 primary
, bond_mode_name(bond_mode
));
6238 if (primary
&& primary_reselect
) {
6239 bond_opt_initstr(&newval
, primary_reselect
);
6240 valptr
= bond_opt_parse(bond_opt_get(BOND_OPT_PRIMARY_RESELECT
),
6243 pr_err("Error: Invalid primary_reselect \"%s\"\n",
6247 primary_reselect_value
= valptr
->value
;
6249 primary_reselect_value
= BOND_PRI_RESELECT_ALWAYS
;
6252 if (fail_over_mac
) {
6253 bond_opt_initstr(&newval
, fail_over_mac
);
6254 valptr
= bond_opt_parse(bond_opt_get(BOND_OPT_FAIL_OVER_MAC
),
6257 pr_err("Error: invalid fail_over_mac \"%s\"\n",
6261 fail_over_mac_value
= valptr
->value
;
6262 if (bond_mode
!= BOND_MODE_ACTIVEBACKUP
)
6263 pr_warn("Warning: fail_over_mac only affects active-backup mode\n");
6265 fail_over_mac_value
= BOND_FOM_NONE
;
6268 bond_opt_initstr(&newval
, "default");
6269 valptr
= bond_opt_parse(
6270 bond_opt_get(BOND_OPT_AD_ACTOR_SYS_PRIO
),
6273 pr_err("Error: No ad_actor_sys_prio default value");
6276 ad_actor_sys_prio
= valptr
->value
;
6278 valptr
= bond_opt_parse(bond_opt_get(BOND_OPT_AD_USER_PORT_KEY
),
6281 pr_err("Error: No ad_user_port_key default value");
6284 ad_user_port_key
= valptr
->value
;
6286 bond_opt_initstr(&newval
, "default");
6287 valptr
= bond_opt_parse(bond_opt_get(BOND_OPT_TLB_DYNAMIC_LB
), &newval
);
6289 pr_err("Error: No tlb_dynamic_lb default value");
6292 tlb_dynamic_lb
= valptr
->value
;
6294 if (lp_interval
== 0) {
6295 pr_warn("Warning: ip_interval must be between 1 and %d, so it was reset to %d\n",
6296 INT_MAX
, BOND_ALB_DEFAULT_LP_INTERVAL
);
6297 lp_interval
= BOND_ALB_DEFAULT_LP_INTERVAL
;
6300 /* fill params struct with the proper values */
6301 params
->mode
= bond_mode
;
6302 params
->xmit_policy
= xmit_hashtype
;
6303 params
->miimon
= miimon
;
6304 params
->num_peer_notif
= num_peer_notif
;
6305 params
->arp_interval
= arp_interval
;
6306 params
->arp_validate
= arp_validate_value
;
6307 params
->arp_all_targets
= arp_all_targets_value
;
6308 params
->missed_max
= 2;
6309 params
->updelay
= updelay
;
6310 params
->downdelay
= downdelay
;
6311 params
->peer_notif_delay
= 0;
6312 params
->use_carrier
= use_carrier
;
6313 params
->lacp_active
= 1;
6314 params
->lacp_fast
= lacp_fast
;
6315 params
->primary
[0] = 0;
6316 params
->primary_reselect
= primary_reselect_value
;
6317 params
->fail_over_mac
= fail_over_mac_value
;
6318 params
->tx_queues
= tx_queues
;
6319 params
->all_slaves_active
= all_slaves_active
;
6320 params
->resend_igmp
= resend_igmp
;
6321 params
->min_links
= min_links
;
6322 params
->lp_interval
= lp_interval
;
6323 params
->packets_per_slave
= packets_per_slave
;
6324 params
->tlb_dynamic_lb
= tlb_dynamic_lb
;
6325 params
->ad_actor_sys_prio
= ad_actor_sys_prio
;
6326 eth_zero_addr(params
->ad_actor_system
);
6327 params
->ad_user_port_key
= ad_user_port_key
;
6328 if (packets_per_slave
> 0) {
6329 params
->reciprocal_packets_per_slave
=
6330 reciprocal_value(packets_per_slave
);
6332 /* reciprocal_packets_per_slave is unused if
6333 * packets_per_slave is 0 or 1, just initialize it
6335 params
->reciprocal_packets_per_slave
=
6336 (struct reciprocal_value
) { 0 };
6340 strscpy_pad(params
->primary
, primary
, sizeof(params
->primary
));
6342 memcpy(params
->arp_targets
, arp_target
, sizeof(arp_target
));
6343 #if IS_ENABLED(CONFIG_IPV6)
6344 memset(params
->ns_targets
, 0, sizeof(struct in6_addr
) * BOND_MAX_NS_TARGETS
);
6350 /* Called from registration process */
6351 static int bond_init(struct net_device
*bond_dev
)
6353 struct bonding
*bond
= netdev_priv(bond_dev
);
6354 struct bond_net
*bn
= net_generic(dev_net(bond_dev
), bond_net_id
);
6356 netdev_dbg(bond_dev
, "Begin bond_init\n");
6358 bond
->wq
= alloc_ordered_workqueue(bond_dev
->name
, WQ_MEM_RECLAIM
);
6362 bond
->notifier_ctx
= false;
6364 spin_lock_init(&bond
->stats_lock
);
6365 netdev_lockdep_set_classes(bond_dev
);
6367 list_add_tail(&bond
->bond_list
, &bn
->dev_list
);
6369 bond_prepare_sysfs_group(bond
);
6371 bond_debug_register(bond
);
6373 /* Ensure valid dev_addr */
6374 if (is_zero_ether_addr(bond_dev
->dev_addr
) &&
6375 bond_dev
->addr_assign_type
== NET_ADDR_PERM
)
6376 eth_hw_addr_random(bond_dev
);
6381 unsigned int bond_get_num_tx_queues(void)
6386 /* Create a new bond based on the specified name and bonding parameters.
6387 * If name is NULL, obtain a suitable "bond%d" name for us.
6388 * Caller must NOT hold rtnl_lock; we need to release it here before we
6389 * set up our sysfs entries.
6391 int bond_create(struct net
*net
, const char *name
)
6393 struct net_device
*bond_dev
;
6394 struct bonding
*bond
;
6399 bond_dev
= alloc_netdev_mq(sizeof(struct bonding
),
6400 name
? name
: "bond%d", NET_NAME_UNKNOWN
,
6401 bond_setup
, tx_queues
);
6405 bond
= netdev_priv(bond_dev
);
6406 dev_net_set(bond_dev
, net
);
6407 bond_dev
->rtnl_link_ops
= &bond_link_ops
;
6409 res
= register_netdevice(bond_dev
);
6411 free_netdev(bond_dev
);
6415 netif_carrier_off(bond_dev
);
6417 bond_work_init_all(bond
);
6424 static int __net_init
bond_net_init(struct net
*net
)
6426 struct bond_net
*bn
= net_generic(net
, bond_net_id
);
6429 INIT_LIST_HEAD(&bn
->dev_list
);
6431 bond_create_proc_dir(bn
);
6432 bond_create_sysfs(bn
);
6437 static void __net_exit
bond_net_exit_batch(struct list_head
*net_list
)
6439 struct bond_net
*bn
;
6443 list_for_each_entry(net
, net_list
, exit_list
) {
6444 bn
= net_generic(net
, bond_net_id
);
6445 bond_destroy_sysfs(bn
);
6448 /* Kill off any bonds created after unregistering bond rtnl ops */
6450 list_for_each_entry(net
, net_list
, exit_list
) {
6451 struct bonding
*bond
, *tmp_bond
;
6453 bn
= net_generic(net
, bond_net_id
);
6454 list_for_each_entry_safe(bond
, tmp_bond
, &bn
->dev_list
, bond_list
)
6455 unregister_netdevice_queue(bond
->dev
, &list
);
6457 unregister_netdevice_many(&list
);
6460 list_for_each_entry(net
, net_list
, exit_list
) {
6461 bn
= net_generic(net
, bond_net_id
);
6462 bond_destroy_proc_dir(bn
);
6466 static struct pernet_operations bond_net_ops
= {
6467 .init
= bond_net_init
,
6468 .exit_batch
= bond_net_exit_batch
,
6470 .size
= sizeof(struct bond_net
),
6473 static int __init
bonding_init(void)
6478 res
= bond_check_params(&bonding_defaults
);
6482 res
= register_pernet_subsys(&bond_net_ops
);
6486 res
= bond_netlink_init();
6490 bond_create_debugfs();
6492 for (i
= 0; i
< max_bonds
; i
++) {
6493 res
= bond_create(&init_net
, NULL
);
6498 skb_flow_dissector_init(&flow_keys_bonding
,
6499 flow_keys_bonding_keys
,
6500 ARRAY_SIZE(flow_keys_bonding_keys
));
6502 register_netdevice_notifier(&bond_netdev_notifier
);
6506 bond_destroy_debugfs();
6507 bond_netlink_fini();
6509 unregister_pernet_subsys(&bond_net_ops
);
6514 static void __exit
bonding_exit(void)
6516 unregister_netdevice_notifier(&bond_netdev_notifier
);
6518 bond_destroy_debugfs();
6520 bond_netlink_fini();
6521 unregister_pernet_subsys(&bond_net_ops
);
6523 #ifdef CONFIG_NET_POLL_CONTROLLER
6524 /* Make sure we don't have an imbalance on our netpoll blocking */
6525 WARN_ON(atomic_read(&netpoll_block_tx
));
6529 module_init(bonding_init
);
6530 module_exit(bonding_exit
);
6531 MODULE_LICENSE("GPL");
6532 MODULE_DESCRIPTION(DRV_DESCRIPTION
);
6533 MODULE_AUTHOR("Thomas Davis, tadavis@lbl.gov and many others");