2 * originally based on the dummy device.
4 * Copyright 1999, Thomas Davis, tadavis@lbl.gov.
5 * Licensed under the GPL. Based on dummy.c, and eql.c devices.
7 * bonding.c: an Ethernet Bonding driver
9 * This is useful to talk to a Cisco EtherChannel compatible equipment:
11 * Sun Trunking (Solaris)
12 * Alteon AceDirector Trunks
14 * and probably many L2 switches ...
17 * ifconfig bond0 ipaddress netmask up
18 * will setup a network device, with an ip address. No mac address
19 * will be assigned at this time. The hw mac address will come from
20 * the first slave bonded to the channel. All slaves will then use
21 * this hw mac address.
24 * will release all slaves, marking them as down.
26 * ifenslave bond0 eth0
27 * will attach eth0 to bond0 as a slave. eth0 hw mac address will either
28 * a: be used as initial mac address
29 * b: if a hw mac address already is there, eth0's hw mac address
30 * will then be set from bond0.
34 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
36 #include <linux/kernel.h>
37 #include <linux/module.h>
38 #include <linux/types.h>
39 #include <linux/fcntl.h>
40 #include <linux/interrupt.h>
41 #include <linux/ptrace.h>
42 #include <linux/ioport.h>
46 #include <linux/tcp.h>
47 #include <linux/udp.h>
48 #include <linux/slab.h>
49 #include <linux/string.h>
50 #include <linux/init.h>
51 #include <linux/timer.h>
52 #include <linux/socket.h>
53 #include <linux/ctype.h>
54 #include <linux/inet.h>
55 #include <linux/bitops.h>
58 #include <linux/uaccess.h>
59 #include <linux/errno.h>
60 #include <linux/netdevice.h>
61 #include <linux/inetdevice.h>
62 #include <linux/igmp.h>
63 #include <linux/etherdevice.h>
64 #include <linux/skbuff.h>
66 #include <linux/rtnetlink.h>
67 #include <linux/smp.h>
68 #include <linux/if_ether.h>
70 #include <linux/mii.h>
71 #include <linux/ethtool.h>
72 #include <linux/if_vlan.h>
73 #include <linux/if_bonding.h>
74 #include <linux/jiffies.h>
75 #include <linux/preempt.h>
76 #include <net/route.h>
77 #include <net/net_namespace.h>
78 #include <net/netns/generic.h>
79 #include <net/pkt_sched.h>
80 #include <linux/rculist.h>
81 #include <net/flow_keys.h>
82 #include <linux/reciprocal_div.h>
87 /*---------------------------- Module parameters ----------------------------*/
89 /* monitor all links that often (in milliseconds). <=0 disables monitoring */
90 #define BOND_LINK_MON_INTERV 0
91 #define BOND_LINK_ARP_INTERV 0
93 static int max_bonds
= BOND_DEFAULT_MAX_BONDS
;
94 static int tx_queues
= BOND_DEFAULT_TX_QUEUES
;
95 static int num_peer_notif
= 1;
96 static int miimon
= BOND_LINK_MON_INTERV
;
99 static int use_carrier
= 1;
101 static char *primary
;
102 static char *primary_reselect
;
103 static char *lacp_rate
;
104 static int min_links
;
105 static char *ad_select
;
106 static char *xmit_hash_policy
;
107 static int arp_interval
= BOND_LINK_ARP_INTERV
;
108 static char *arp_ip_target
[BOND_MAX_ARP_TARGETS
];
109 static char *arp_validate
;
110 static char *arp_all_targets
;
111 static char *fail_over_mac
;
112 static int all_slaves_active
;
113 static struct bond_params bonding_defaults
;
114 static int resend_igmp
= BOND_DEFAULT_RESEND_IGMP
;
115 static int packets_per_slave
= 1;
116 static int lp_interval
= BOND_ALB_DEFAULT_LP_INTERVAL
;
118 module_param(max_bonds
, int, 0);
119 MODULE_PARM_DESC(max_bonds
, "Max number of bonded devices");
120 module_param(tx_queues
, int, 0);
121 MODULE_PARM_DESC(tx_queues
, "Max number of transmit queues (default = 16)");
122 module_param_named(num_grat_arp
, num_peer_notif
, int, 0644);
123 MODULE_PARM_DESC(num_grat_arp
, "Number of peer notifications to send on "
124 "failover event (alias of num_unsol_na)");
125 module_param_named(num_unsol_na
, num_peer_notif
, int, 0644);
126 MODULE_PARM_DESC(num_unsol_na
, "Number of peer notifications to send on "
127 "failover event (alias of num_grat_arp)");
128 module_param(miimon
, int, 0);
129 MODULE_PARM_DESC(miimon
, "Link check interval in milliseconds");
130 module_param(updelay
, int, 0);
131 MODULE_PARM_DESC(updelay
, "Delay before considering link up, in milliseconds");
132 module_param(downdelay
, int, 0);
133 MODULE_PARM_DESC(downdelay
, "Delay before considering link down, "
135 module_param(use_carrier
, int, 0);
136 MODULE_PARM_DESC(use_carrier
, "Use netif_carrier_ok (vs MII ioctls) in miimon; "
137 "0 for off, 1 for on (default)");
138 module_param(mode
, charp
, 0);
139 MODULE_PARM_DESC(mode
, "Mode of operation; 0 for balance-rr, "
140 "1 for active-backup, 2 for balance-xor, "
141 "3 for broadcast, 4 for 802.3ad, 5 for balance-tlb, "
142 "6 for balance-alb");
143 module_param(primary
, charp
, 0);
144 MODULE_PARM_DESC(primary
, "Primary network device to use");
145 module_param(primary_reselect
, charp
, 0);
146 MODULE_PARM_DESC(primary_reselect
, "Reselect primary slave "
148 "0 for always (default), "
149 "1 for only if speed of primary is "
151 "2 for only on active slave "
153 module_param(lacp_rate
, charp
, 0);
154 MODULE_PARM_DESC(lacp_rate
, "LACPDU tx rate to request from 802.3ad partner; "
155 "0 for slow, 1 for fast");
156 module_param(ad_select
, charp
, 0);
157 MODULE_PARM_DESC(ad_select
, "803.ad aggregation selection logic; "
158 "0 for stable (default), 1 for bandwidth, "
160 module_param(min_links
, int, 0);
161 MODULE_PARM_DESC(min_links
, "Minimum number of available links before turning on carrier");
163 module_param(xmit_hash_policy
, charp
, 0);
164 MODULE_PARM_DESC(xmit_hash_policy
, "balance-xor and 802.3ad hashing method; "
165 "0 for layer 2 (default), 1 for layer 3+4, "
166 "2 for layer 2+3, 3 for encap layer 2+3, "
167 "4 for encap layer 3+4");
168 module_param(arp_interval
, int, 0);
169 MODULE_PARM_DESC(arp_interval
, "arp interval in milliseconds");
170 module_param_array(arp_ip_target
, charp
, NULL
, 0);
171 MODULE_PARM_DESC(arp_ip_target
, "arp targets in n.n.n.n form");
172 module_param(arp_validate
, charp
, 0);
173 MODULE_PARM_DESC(arp_validate
, "validate src/dst of ARP probes; "
174 "0 for none (default), 1 for active, "
175 "2 for backup, 3 for all");
176 module_param(arp_all_targets
, charp
, 0);
177 MODULE_PARM_DESC(arp_all_targets
, "fail on any/all arp targets timeout; 0 for any (default), 1 for all");
178 module_param(fail_over_mac
, charp
, 0);
179 MODULE_PARM_DESC(fail_over_mac
, "For active-backup, do not set all slaves to "
180 "the same MAC; 0 for none (default), "
181 "1 for active, 2 for follow");
182 module_param(all_slaves_active
, int, 0);
183 MODULE_PARM_DESC(all_slaves_active
, "Keep all frames received on an interface"
184 "by setting active flag for all slaves; "
185 "0 for never (default), 1 for always.");
186 module_param(resend_igmp
, int, 0);
187 MODULE_PARM_DESC(resend_igmp
, "Number of IGMP membership reports to send on "
189 module_param(packets_per_slave
, int, 0);
190 MODULE_PARM_DESC(packets_per_slave
, "Packets to send per slave in balance-rr "
191 "mode; 0 for a random slave, 1 packet per "
192 "slave (default), >1 packets per slave.");
193 module_param(lp_interval
, uint
, 0);
194 MODULE_PARM_DESC(lp_interval
, "The number of seconds between instances where "
195 "the bonding driver sends learning packets to "
196 "each slaves peer switch. The default is 1.");
198 /*----------------------------- Global variables ----------------------------*/
200 #ifdef CONFIG_NET_POLL_CONTROLLER
201 atomic_t netpoll_block_tx
= ATOMIC_INIT(0);
204 int bond_net_id __read_mostly
;
206 static __be32 arp_target
[BOND_MAX_ARP_TARGETS
];
207 static int arp_ip_count
;
208 static int bond_mode
= BOND_MODE_ROUNDROBIN
;
209 static int xmit_hashtype
= BOND_XMIT_POLICY_LAYER2
;
210 static int lacp_fast
;
212 const struct bond_parm_tbl bond_lacp_tbl
[] = {
213 { "slow", AD_LACP_SLOW
},
214 { "fast", AD_LACP_FAST
},
218 const struct bond_parm_tbl bond_mode_tbl
[] = {
219 { "balance-rr", BOND_MODE_ROUNDROBIN
},
220 { "active-backup", BOND_MODE_ACTIVEBACKUP
},
221 { "balance-xor", BOND_MODE_XOR
},
222 { "broadcast", BOND_MODE_BROADCAST
},
223 { "802.3ad", BOND_MODE_8023AD
},
224 { "balance-tlb", BOND_MODE_TLB
},
225 { "balance-alb", BOND_MODE_ALB
},
229 const struct bond_parm_tbl xmit_hashtype_tbl
[] = {
230 { "layer2", BOND_XMIT_POLICY_LAYER2
},
231 { "layer3+4", BOND_XMIT_POLICY_LAYER34
},
232 { "layer2+3", BOND_XMIT_POLICY_LAYER23
},
233 { "encap2+3", BOND_XMIT_POLICY_ENCAP23
},
234 { "encap3+4", BOND_XMIT_POLICY_ENCAP34
},
238 const struct bond_parm_tbl arp_all_targets_tbl
[] = {
239 { "any", BOND_ARP_TARGETS_ANY
},
240 { "all", BOND_ARP_TARGETS_ALL
},
244 const struct bond_parm_tbl arp_validate_tbl
[] = {
245 { "none", BOND_ARP_VALIDATE_NONE
},
246 { "active", BOND_ARP_VALIDATE_ACTIVE
},
247 { "backup", BOND_ARP_VALIDATE_BACKUP
},
248 { "all", BOND_ARP_VALIDATE_ALL
},
252 const struct bond_parm_tbl fail_over_mac_tbl
[] = {
253 { "none", BOND_FOM_NONE
},
254 { "active", BOND_FOM_ACTIVE
},
255 { "follow", BOND_FOM_FOLLOW
},
259 const struct bond_parm_tbl pri_reselect_tbl
[] = {
260 { "always", BOND_PRI_RESELECT_ALWAYS
},
261 { "better", BOND_PRI_RESELECT_BETTER
},
262 { "failure", BOND_PRI_RESELECT_FAILURE
},
266 struct bond_parm_tbl ad_select_tbl
[] = {
267 { "stable", BOND_AD_STABLE
},
268 { "bandwidth", BOND_AD_BANDWIDTH
},
269 { "count", BOND_AD_COUNT
},
273 /*-------------------------- Forward declarations ---------------------------*/
275 static int bond_init(struct net_device
*bond_dev
);
276 static void bond_uninit(struct net_device
*bond_dev
);
278 /*---------------------------- General routines -----------------------------*/
280 const char *bond_mode_name(int mode
)
282 static const char *names
[] = {
283 [BOND_MODE_ROUNDROBIN
] = "load balancing (round-robin)",
284 [BOND_MODE_ACTIVEBACKUP
] = "fault-tolerance (active-backup)",
285 [BOND_MODE_XOR
] = "load balancing (xor)",
286 [BOND_MODE_BROADCAST
] = "fault-tolerance (broadcast)",
287 [BOND_MODE_8023AD
] = "IEEE 802.3ad Dynamic link aggregation",
288 [BOND_MODE_TLB
] = "transmit load balancing",
289 [BOND_MODE_ALB
] = "adaptive load balancing",
292 if (mode
< BOND_MODE_ROUNDROBIN
|| mode
> BOND_MODE_ALB
)
298 /*---------------------------------- VLAN -----------------------------------*/
301 * bond_dev_queue_xmit - Prepare skb for xmit.
303 * @bond: bond device that got this skb for tx.
304 * @skb: hw accel VLAN tagged skb to transmit
305 * @slave_dev: slave that is supposed to xmit this skbuff
307 int bond_dev_queue_xmit(struct bonding
*bond
, struct sk_buff
*skb
,
308 struct net_device
*slave_dev
)
310 skb
->dev
= slave_dev
;
312 BUILD_BUG_ON(sizeof(skb
->queue_mapping
) !=
313 sizeof(qdisc_skb_cb(skb
)->slave_dev_queue_mapping
));
314 skb
->queue_mapping
= qdisc_skb_cb(skb
)->slave_dev_queue_mapping
;
316 if (unlikely(netpoll_tx_running(bond
->dev
)))
317 bond_netpoll_send_skb(bond_get_slave_by_dev(bond
, slave_dev
), skb
);
325 * In the following 2 functions, bond_vlan_rx_add_vid and bond_vlan_rx_kill_vid,
326 * We don't protect the slave list iteration with a lock because:
327 * a. This operation is performed in IOCTL context,
328 * b. The operation is protected by the RTNL semaphore in the 8021q code,
329 * c. Holding a lock with BH disabled while directly calling a base driver
330 * entry point is generally a BAD idea.
332 * The design of synchronization/protection for this operation in the 8021q
333 * module is good for one or more VLAN devices over a single physical device
334 * and cannot be extended for a teaming solution like bonding, so there is a
335 * potential race condition here where a net device from the vlan group might
336 * be referenced (either by a base driver or the 8021q code) while it is being
337 * removed from the system. However, it turns out we're not making matters
338 * worse, and if it works for regular VLAN usage it will work here too.
342 * bond_vlan_rx_add_vid - Propagates adding an id to slaves
343 * @bond_dev: bonding net device that got called
344 * @vid: vlan id being added
346 static int bond_vlan_rx_add_vid(struct net_device
*bond_dev
,
347 __be16 proto
, u16 vid
)
349 struct bonding
*bond
= netdev_priv(bond_dev
);
350 struct slave
*slave
, *rollback_slave
;
351 struct list_head
*iter
;
354 bond_for_each_slave(bond
, slave
, iter
) {
355 res
= vlan_vid_add(slave
->dev
, proto
, vid
);
363 /* unwind to the slave that failed */
364 bond_for_each_slave(bond
, rollback_slave
, iter
) {
365 if (rollback_slave
== slave
)
368 vlan_vid_del(rollback_slave
->dev
, proto
, vid
);
375 * bond_vlan_rx_kill_vid - Propagates deleting an id to slaves
376 * @bond_dev: bonding net device that got called
377 * @vid: vlan id being removed
379 static int bond_vlan_rx_kill_vid(struct net_device
*bond_dev
,
380 __be16 proto
, u16 vid
)
382 struct bonding
*bond
= netdev_priv(bond_dev
);
383 struct list_head
*iter
;
386 bond_for_each_slave(bond
, slave
, iter
)
387 vlan_vid_del(slave
->dev
, proto
, vid
);
389 if (bond_is_lb(bond
))
390 bond_alb_clear_vlan(bond
, vid
);
395 /*------------------------------- Link status -------------------------------*/
398 * Set the carrier state for the master according to the state of its
399 * slaves. If any slaves are up, the master is up. In 802.3ad mode,
400 * do special 802.3ad magic.
402 * Returns zero if carrier state does not change, nonzero if it does.
404 static int bond_set_carrier(struct bonding
*bond
)
406 struct list_head
*iter
;
409 if (!bond_has_slaves(bond
))
412 if (bond
->params
.mode
== BOND_MODE_8023AD
)
413 return bond_3ad_set_carrier(bond
);
415 bond_for_each_slave(bond
, slave
, iter
) {
416 if (slave
->link
== BOND_LINK_UP
) {
417 if (!netif_carrier_ok(bond
->dev
)) {
418 netif_carrier_on(bond
->dev
);
426 if (netif_carrier_ok(bond
->dev
)) {
427 netif_carrier_off(bond
->dev
);
434 * Get link speed and duplex from the slave's base driver
435 * using ethtool. If for some reason the call fails or the
436 * values are invalid, set speed and duplex to -1,
439 static void bond_update_speed_duplex(struct slave
*slave
)
441 struct net_device
*slave_dev
= slave
->dev
;
442 struct ethtool_cmd ecmd
;
446 slave
->speed
= SPEED_UNKNOWN
;
447 slave
->duplex
= DUPLEX_UNKNOWN
;
449 res
= __ethtool_get_settings(slave_dev
, &ecmd
);
453 slave_speed
= ethtool_cmd_speed(&ecmd
);
454 if (slave_speed
== 0 || slave_speed
== ((__u32
) -1))
457 switch (ecmd
.duplex
) {
465 slave
->speed
= slave_speed
;
466 slave
->duplex
= ecmd
.duplex
;
472 * if <dev> supports MII link status reporting, check its link status.
474 * We either do MII/ETHTOOL ioctls, or check netif_carrier_ok(),
475 * depending upon the setting of the use_carrier parameter.
477 * Return either BMSR_LSTATUS, meaning that the link is up (or we
478 * can't tell and just pretend it is), or 0, meaning that the link is
481 * If reporting is non-zero, instead of faking link up, return -1 if
482 * both ETHTOOL and MII ioctls fail (meaning the device does not
483 * support them). If use_carrier is set, return whatever it says.
484 * It'd be nice if there was a good way to tell if a driver supports
485 * netif_carrier, but there really isn't.
487 static int bond_check_dev_link(struct bonding
*bond
,
488 struct net_device
*slave_dev
, int reporting
)
490 const struct net_device_ops
*slave_ops
= slave_dev
->netdev_ops
;
491 int (*ioctl
)(struct net_device
*, struct ifreq
*, int);
493 struct mii_ioctl_data
*mii
;
495 if (!reporting
&& !netif_running(slave_dev
))
498 if (bond
->params
.use_carrier
)
499 return netif_carrier_ok(slave_dev
) ? BMSR_LSTATUS
: 0;
501 /* Try to get link status using Ethtool first. */
502 if (slave_dev
->ethtool_ops
->get_link
)
503 return slave_dev
->ethtool_ops
->get_link(slave_dev
) ?
506 /* Ethtool can't be used, fallback to MII ioctls. */
507 ioctl
= slave_ops
->ndo_do_ioctl
;
509 /* TODO: set pointer to correct ioctl on a per team member */
510 /* bases to make this more efficient. that is, once */
511 /* we determine the correct ioctl, we will always */
512 /* call it and not the others for that team */
516 * We cannot assume that SIOCGMIIPHY will also read a
517 * register; not all network drivers (e.g., e100)
521 /* Yes, the mii is overlaid on the ifreq.ifr_ifru */
522 strncpy(ifr
.ifr_name
, slave_dev
->name
, IFNAMSIZ
);
524 if (IOCTL(slave_dev
, &ifr
, SIOCGMIIPHY
) == 0) {
525 mii
->reg_num
= MII_BMSR
;
526 if (IOCTL(slave_dev
, &ifr
, SIOCGMIIREG
) == 0)
527 return mii
->val_out
& BMSR_LSTATUS
;
532 * If reporting, report that either there's no dev->do_ioctl,
533 * or both SIOCGMIIREG and get_link failed (meaning that we
534 * cannot report link status). If not reporting, pretend
537 return reporting
? -1 : BMSR_LSTATUS
;
540 /*----------------------------- Multicast list ------------------------------*/
543 * Push the promiscuity flag down to appropriate slaves
545 static int bond_set_promiscuity(struct bonding
*bond
, int inc
)
547 struct list_head
*iter
;
550 if (USES_PRIMARY(bond
->params
.mode
)) {
551 /* write lock already acquired */
552 if (bond
->curr_active_slave
) {
553 err
= dev_set_promiscuity(bond
->curr_active_slave
->dev
,
559 bond_for_each_slave(bond
, slave
, iter
) {
560 err
= dev_set_promiscuity(slave
->dev
, inc
);
569 * Push the allmulti flag down to all slaves
571 static int bond_set_allmulti(struct bonding
*bond
, int inc
)
573 struct list_head
*iter
;
576 if (USES_PRIMARY(bond
->params
.mode
)) {
577 /* write lock already acquired */
578 if (bond
->curr_active_slave
) {
579 err
= dev_set_allmulti(bond
->curr_active_slave
->dev
,
585 bond_for_each_slave(bond
, slave
, iter
) {
586 err
= dev_set_allmulti(slave
->dev
, inc
);
595 * Retrieve the list of registered multicast addresses for the bonding
596 * device and retransmit an IGMP JOIN request to the current active
599 static void bond_resend_igmp_join_requests_delayed(struct work_struct
*work
)
601 struct bonding
*bond
= container_of(work
, struct bonding
,
604 if (!rtnl_trylock()) {
605 queue_delayed_work(bond
->wq
, &bond
->mcast_work
, 1);
608 call_netdevice_notifiers(NETDEV_RESEND_IGMP
, bond
->dev
);
610 if (bond
->igmp_retrans
> 1) {
611 bond
->igmp_retrans
--;
612 queue_delayed_work(bond
->wq
, &bond
->mcast_work
, HZ
/5);
617 /* Flush bond's hardware addresses from slave
619 static void bond_hw_addr_flush(struct net_device
*bond_dev
,
620 struct net_device
*slave_dev
)
622 struct bonding
*bond
= netdev_priv(bond_dev
);
624 dev_uc_unsync(slave_dev
, bond_dev
);
625 dev_mc_unsync(slave_dev
, bond_dev
);
627 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
628 /* del lacpdu mc addr from mc list */
629 u8 lacpdu_multicast
[ETH_ALEN
] = MULTICAST_LACPDU_ADDR
;
631 dev_mc_del(slave_dev
, lacpdu_multicast
);
635 /*--------------------------- Active slave change ---------------------------*/
637 /* Update the hardware address list and promisc/allmulti for the new and
638 * old active slaves (if any). Modes that are !USES_PRIMARY keep all
639 * slaves up date at all times; only the USES_PRIMARY modes need to call
640 * this function to swap these settings during a failover.
642 static void bond_hw_addr_swap(struct bonding
*bond
, struct slave
*new_active
,
643 struct slave
*old_active
)
648 if (bond
->dev
->flags
& IFF_PROMISC
)
649 dev_set_promiscuity(old_active
->dev
, -1);
651 if (bond
->dev
->flags
& IFF_ALLMULTI
)
652 dev_set_allmulti(old_active
->dev
, -1);
654 bond_hw_addr_flush(bond
->dev
, old_active
->dev
);
658 /* FIXME: Signal errors upstream. */
659 if (bond
->dev
->flags
& IFF_PROMISC
)
660 dev_set_promiscuity(new_active
->dev
, 1);
662 if (bond
->dev
->flags
& IFF_ALLMULTI
)
663 dev_set_allmulti(new_active
->dev
, 1);
665 netif_addr_lock_bh(bond
->dev
);
666 dev_uc_sync(new_active
->dev
, bond
->dev
);
667 dev_mc_sync(new_active
->dev
, bond
->dev
);
668 netif_addr_unlock_bh(bond
->dev
);
673 * bond_set_dev_addr - clone slave's address to bond
674 * @bond_dev: bond net device
675 * @slave_dev: slave net device
677 * Should be called with RTNL held.
679 static void bond_set_dev_addr(struct net_device
*bond_dev
,
680 struct net_device
*slave_dev
)
682 pr_debug("bond_dev=%p slave_dev=%p slave_dev->addr_len=%d\n",
683 bond_dev
, slave_dev
, slave_dev
->addr_len
);
684 memcpy(bond_dev
->dev_addr
, slave_dev
->dev_addr
, slave_dev
->addr_len
);
685 bond_dev
->addr_assign_type
= NET_ADDR_STOLEN
;
686 call_netdevice_notifiers(NETDEV_CHANGEADDR
, bond_dev
);
690 * bond_do_fail_over_mac
692 * Perform special MAC address swapping for fail_over_mac settings
694 * Called with RTNL, curr_slave_lock for write_bh.
696 static void bond_do_fail_over_mac(struct bonding
*bond
,
697 struct slave
*new_active
,
698 struct slave
*old_active
)
699 __releases(&bond
->curr_slave_lock
)
700 __acquires(&bond
->curr_slave_lock
)
702 u8 tmp_mac
[ETH_ALEN
];
703 struct sockaddr saddr
;
706 switch (bond
->params
.fail_over_mac
) {
707 case BOND_FOM_ACTIVE
:
709 write_unlock_bh(&bond
->curr_slave_lock
);
710 bond_set_dev_addr(bond
->dev
, new_active
->dev
);
711 write_lock_bh(&bond
->curr_slave_lock
);
714 case BOND_FOM_FOLLOW
:
716 * if new_active && old_active, swap them
717 * if just old_active, do nothing (going to no active slave)
718 * if just new_active, set new_active to bond's MAC
723 write_unlock_bh(&bond
->curr_slave_lock
);
726 memcpy(tmp_mac
, new_active
->dev
->dev_addr
, ETH_ALEN
);
727 memcpy(saddr
.sa_data
, old_active
->dev
->dev_addr
,
729 saddr
.sa_family
= new_active
->dev
->type
;
731 memcpy(saddr
.sa_data
, bond
->dev
->dev_addr
, ETH_ALEN
);
732 saddr
.sa_family
= bond
->dev
->type
;
735 rv
= dev_set_mac_address(new_active
->dev
, &saddr
);
737 pr_err("%s: Error %d setting MAC of slave %s\n",
738 bond
->dev
->name
, -rv
, new_active
->dev
->name
);
745 memcpy(saddr
.sa_data
, tmp_mac
, ETH_ALEN
);
746 saddr
.sa_family
= old_active
->dev
->type
;
748 rv
= dev_set_mac_address(old_active
->dev
, &saddr
);
750 pr_err("%s: Error %d setting MAC of slave %s\n",
751 bond
->dev
->name
, -rv
, new_active
->dev
->name
);
753 write_lock_bh(&bond
->curr_slave_lock
);
756 pr_err("%s: bond_do_fail_over_mac impossible: bad policy %d\n",
757 bond
->dev
->name
, bond
->params
.fail_over_mac
);
763 static bool bond_should_change_active(struct bonding
*bond
)
765 struct slave
*prim
= bond
->primary_slave
;
766 struct slave
*curr
= bond
->curr_active_slave
;
768 if (!prim
|| !curr
|| curr
->link
!= BOND_LINK_UP
)
770 if (bond
->force_primary
) {
771 bond
->force_primary
= false;
774 if (bond
->params
.primary_reselect
== BOND_PRI_RESELECT_BETTER
&&
775 (prim
->speed
< curr
->speed
||
776 (prim
->speed
== curr
->speed
&& prim
->duplex
<= curr
->duplex
)))
778 if (bond
->params
.primary_reselect
== BOND_PRI_RESELECT_FAILURE
)
784 * find_best_interface - select the best available slave to be the active one
785 * @bond: our bonding struct
787 static struct slave
*bond_find_best_slave(struct bonding
*bond
)
789 struct slave
*slave
, *bestslave
= NULL
;
790 struct list_head
*iter
;
791 int mintime
= bond
->params
.updelay
;
793 if (bond
->primary_slave
&& bond
->primary_slave
->link
== BOND_LINK_UP
&&
794 bond_should_change_active(bond
))
795 return bond
->primary_slave
;
797 bond_for_each_slave(bond
, slave
, iter
) {
798 if (slave
->link
== BOND_LINK_UP
)
800 if (slave
->link
== BOND_LINK_BACK
&& IS_UP(slave
->dev
) &&
801 slave
->delay
< mintime
) {
802 mintime
= slave
->delay
;
810 static bool bond_should_notify_peers(struct bonding
*bond
)
815 slave
= rcu_dereference(bond
->curr_active_slave
);
818 pr_debug("bond_should_notify_peers: bond %s slave %s\n",
819 bond
->dev
->name
, slave
? slave
->dev
->name
: "NULL");
821 if (!slave
|| !bond
->send_peer_notif
||
822 test_bit(__LINK_STATE_LINKWATCH_PENDING
, &slave
->dev
->state
))
829 * change_active_interface - change the active slave into the specified one
830 * @bond: our bonding struct
831 * @new: the new slave to make the active one
833 * Set the new slave to the bond's settings and unset them on the old
835 * Setting include flags, mc-list, promiscuity, allmulti, etc.
837 * If @new's link state is %BOND_LINK_BACK we'll set it to %BOND_LINK_UP,
838 * because it is apparently the best available slave we have, even though its
839 * updelay hasn't timed out yet.
841 * If new_active is not NULL, caller must hold curr_slave_lock for write_bh.
843 void bond_change_active_slave(struct bonding
*bond
, struct slave
*new_active
)
845 struct slave
*old_active
= bond
->curr_active_slave
;
847 if (old_active
== new_active
)
851 new_active
->jiffies
= jiffies
;
853 if (new_active
->link
== BOND_LINK_BACK
) {
854 if (USES_PRIMARY(bond
->params
.mode
)) {
855 pr_info("%s: making interface %s the new active one %d ms earlier.\n",
856 bond
->dev
->name
, new_active
->dev
->name
,
857 (bond
->params
.updelay
- new_active
->delay
) * bond
->params
.miimon
);
860 new_active
->delay
= 0;
861 new_active
->link
= BOND_LINK_UP
;
863 if (bond
->params
.mode
== BOND_MODE_8023AD
)
864 bond_3ad_handle_link_change(new_active
, BOND_LINK_UP
);
866 if (bond_is_lb(bond
))
867 bond_alb_handle_link_change(bond
, new_active
, BOND_LINK_UP
);
869 if (USES_PRIMARY(bond
->params
.mode
)) {
870 pr_info("%s: making interface %s the new active one.\n",
871 bond
->dev
->name
, new_active
->dev
->name
);
876 if (USES_PRIMARY(bond
->params
.mode
))
877 bond_hw_addr_swap(bond
, new_active
, old_active
);
879 if (bond_is_lb(bond
)) {
880 bond_alb_handle_active_change(bond
, new_active
);
882 bond_set_slave_inactive_flags(old_active
);
884 bond_set_slave_active_flags(new_active
);
886 rcu_assign_pointer(bond
->curr_active_slave
, new_active
);
889 if (bond
->params
.mode
== BOND_MODE_ACTIVEBACKUP
) {
891 bond_set_slave_inactive_flags(old_active
);
894 bool should_notify_peers
= false;
896 bond_set_slave_active_flags(new_active
);
898 if (bond
->params
.fail_over_mac
)
899 bond_do_fail_over_mac(bond
, new_active
,
902 if (netif_running(bond
->dev
)) {
903 bond
->send_peer_notif
=
904 bond
->params
.num_peer_notif
;
905 should_notify_peers
=
906 bond_should_notify_peers(bond
);
909 write_unlock_bh(&bond
->curr_slave_lock
);
911 call_netdevice_notifiers(NETDEV_BONDING_FAILOVER
, bond
->dev
);
912 if (should_notify_peers
)
913 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS
,
916 write_lock_bh(&bond
->curr_slave_lock
);
920 /* resend IGMP joins since active slave has changed or
921 * all were sent on curr_active_slave.
922 * resend only if bond is brought up with the affected
923 * bonding modes and the retransmission is enabled */
924 if (netif_running(bond
->dev
) && (bond
->params
.resend_igmp
> 0) &&
925 ((USES_PRIMARY(bond
->params
.mode
) && new_active
) ||
926 bond
->params
.mode
== BOND_MODE_ROUNDROBIN
)) {
927 bond
->igmp_retrans
= bond
->params
.resend_igmp
;
928 queue_delayed_work(bond
->wq
, &bond
->mcast_work
, 1);
933 * bond_select_active_slave - select a new active slave, if needed
934 * @bond: our bonding struct
936 * This functions should be called when one of the following occurs:
937 * - The old curr_active_slave has been released or lost its link.
938 * - The primary_slave has got its link back.
939 * - A slave has got its link back and there's no old curr_active_slave.
941 * Caller must hold curr_slave_lock for write_bh.
943 void bond_select_active_slave(struct bonding
*bond
)
945 struct slave
*best_slave
;
948 best_slave
= bond_find_best_slave(bond
);
949 if (best_slave
!= bond
->curr_active_slave
) {
950 bond_change_active_slave(bond
, best_slave
);
951 rv
= bond_set_carrier(bond
);
955 if (netif_carrier_ok(bond
->dev
)) {
956 pr_info("%s: first active interface up!\n",
959 pr_info("%s: now running without any active interface !\n",
965 #ifdef CONFIG_NET_POLL_CONTROLLER
966 static inline int slave_enable_netpoll(struct slave
*slave
)
971 np
= kzalloc(sizeof(*np
), GFP_ATOMIC
);
976 err
= __netpoll_setup(np
, slave
->dev
, GFP_ATOMIC
);
985 static inline void slave_disable_netpoll(struct slave
*slave
)
987 struct netpoll
*np
= slave
->np
;
993 __netpoll_free_async(np
);
995 static inline bool slave_dev_support_netpoll(struct net_device
*slave_dev
)
997 if (slave_dev
->priv_flags
& IFF_DISABLE_NETPOLL
)
999 if (!slave_dev
->netdev_ops
->ndo_poll_controller
)
1004 static void bond_poll_controller(struct net_device
*bond_dev
)
1008 static void bond_netpoll_cleanup(struct net_device
*bond_dev
)
1010 struct bonding
*bond
= netdev_priv(bond_dev
);
1011 struct list_head
*iter
;
1012 struct slave
*slave
;
1014 bond_for_each_slave(bond
, slave
, iter
)
1015 if (IS_UP(slave
->dev
))
1016 slave_disable_netpoll(slave
);
1019 static int bond_netpoll_setup(struct net_device
*dev
, struct netpoll_info
*ni
, gfp_t gfp
)
1021 struct bonding
*bond
= netdev_priv(dev
);
1022 struct list_head
*iter
;
1023 struct slave
*slave
;
1026 bond_for_each_slave(bond
, slave
, iter
) {
1027 err
= slave_enable_netpoll(slave
);
1029 bond_netpoll_cleanup(dev
);
1036 static inline int slave_enable_netpoll(struct slave
*slave
)
1040 static inline void slave_disable_netpoll(struct slave
*slave
)
1043 static void bond_netpoll_cleanup(struct net_device
*bond_dev
)
1048 /*---------------------------------- IOCTL ----------------------------------*/
1050 static netdev_features_t
bond_fix_features(struct net_device
*dev
,
1051 netdev_features_t features
)
1053 struct bonding
*bond
= netdev_priv(dev
);
1054 struct list_head
*iter
;
1055 netdev_features_t mask
;
1056 struct slave
*slave
;
1058 if (!bond_has_slaves(bond
)) {
1059 /* Disable adding VLANs to empty bond. But why? --mq */
1060 features
|= NETIF_F_VLAN_CHALLENGED
;
1065 features
&= ~NETIF_F_ONE_FOR_ALL
;
1066 features
|= NETIF_F_ALL_FOR_ALL
;
1068 bond_for_each_slave(bond
, slave
, iter
) {
1069 features
= netdev_increment_features(features
,
1070 slave
->dev
->features
,
1073 features
= netdev_add_tso_features(features
, mask
);
1078 #define BOND_VLAN_FEATURES (NETIF_F_ALL_CSUM | NETIF_F_SG | \
1079 NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
1080 NETIF_F_HIGHDMA | NETIF_F_LRO)
1082 static void bond_compute_features(struct bonding
*bond
)
1084 unsigned int flags
, dst_release_flag
= IFF_XMIT_DST_RELEASE
;
1085 netdev_features_t vlan_features
= BOND_VLAN_FEATURES
;
1086 struct net_device
*bond_dev
= bond
->dev
;
1087 struct list_head
*iter
;
1088 struct slave
*slave
;
1089 unsigned short max_hard_header_len
= ETH_HLEN
;
1090 unsigned int gso_max_size
= GSO_MAX_SIZE
;
1091 u16 gso_max_segs
= GSO_MAX_SEGS
;
1093 if (!bond_has_slaves(bond
))
1096 bond_for_each_slave(bond
, slave
, iter
) {
1097 vlan_features
= netdev_increment_features(vlan_features
,
1098 slave
->dev
->vlan_features
, BOND_VLAN_FEATURES
);
1100 dst_release_flag
&= slave
->dev
->priv_flags
;
1101 if (slave
->dev
->hard_header_len
> max_hard_header_len
)
1102 max_hard_header_len
= slave
->dev
->hard_header_len
;
1104 gso_max_size
= min(gso_max_size
, slave
->dev
->gso_max_size
);
1105 gso_max_segs
= min(gso_max_segs
, slave
->dev
->gso_max_segs
);
1109 bond_dev
->vlan_features
= vlan_features
;
1110 bond_dev
->hard_header_len
= max_hard_header_len
;
1111 bond_dev
->gso_max_segs
= gso_max_segs
;
1112 netif_set_gso_max_size(bond_dev
, gso_max_size
);
1114 flags
= bond_dev
->priv_flags
& ~IFF_XMIT_DST_RELEASE
;
1115 bond_dev
->priv_flags
= flags
| dst_release_flag
;
1117 netdev_change_features(bond_dev
);
1120 static void bond_setup_by_slave(struct net_device
*bond_dev
,
1121 struct net_device
*slave_dev
)
1123 bond_dev
->header_ops
= slave_dev
->header_ops
;
1125 bond_dev
->type
= slave_dev
->type
;
1126 bond_dev
->hard_header_len
= slave_dev
->hard_header_len
;
1127 bond_dev
->addr_len
= slave_dev
->addr_len
;
1129 memcpy(bond_dev
->broadcast
, slave_dev
->broadcast
,
1130 slave_dev
->addr_len
);
1133 /* On bonding slaves other than the currently active slave, suppress
1134 * duplicates except for alb non-mcast/bcast.
1136 static bool bond_should_deliver_exact_match(struct sk_buff
*skb
,
1137 struct slave
*slave
,
1138 struct bonding
*bond
)
1140 if (bond_is_slave_inactive(slave
)) {
1141 if (bond
->params
.mode
== BOND_MODE_ALB
&&
1142 skb
->pkt_type
!= PACKET_BROADCAST
&&
1143 skb
->pkt_type
!= PACKET_MULTICAST
)
1150 static rx_handler_result_t
bond_handle_frame(struct sk_buff
**pskb
)
1152 struct sk_buff
*skb
= *pskb
;
1153 struct slave
*slave
;
1154 struct bonding
*bond
;
1155 int (*recv_probe
)(const struct sk_buff
*, struct bonding
*,
1157 int ret
= RX_HANDLER_ANOTHER
;
1159 skb
= skb_share_check(skb
, GFP_ATOMIC
);
1161 return RX_HANDLER_CONSUMED
;
1165 slave
= bond_slave_get_rcu(skb
->dev
);
1168 if (bond
->params
.arp_interval
)
1169 slave
->dev
->last_rx
= jiffies
;
1171 recv_probe
= ACCESS_ONCE(bond
->recv_probe
);
1173 ret
= recv_probe(skb
, bond
, slave
);
1174 if (ret
== RX_HANDLER_CONSUMED
) {
1180 if (bond_should_deliver_exact_match(skb
, slave
, bond
)) {
1181 return RX_HANDLER_EXACT
;
1184 skb
->dev
= bond
->dev
;
1186 if (bond
->params
.mode
== BOND_MODE_ALB
&&
1187 bond
->dev
->priv_flags
& IFF_BRIDGE_PORT
&&
1188 skb
->pkt_type
== PACKET_HOST
) {
1190 if (unlikely(skb_cow_head(skb
,
1191 skb
->data
- skb_mac_header(skb
)))) {
1193 return RX_HANDLER_CONSUMED
;
1195 memcpy(eth_hdr(skb
)->h_dest
, bond
->dev
->dev_addr
, ETH_ALEN
);
1201 static int bond_master_upper_dev_link(struct net_device
*bond_dev
,
1202 struct net_device
*slave_dev
,
1203 struct slave
*slave
)
1207 err
= netdev_master_upper_dev_link_private(slave_dev
, bond_dev
, slave
);
1210 slave_dev
->flags
|= IFF_SLAVE
;
1211 rtmsg_ifinfo(RTM_NEWLINK
, slave_dev
, IFF_SLAVE
, GFP_KERNEL
);
1215 static void bond_upper_dev_unlink(struct net_device
*bond_dev
,
1216 struct net_device
*slave_dev
)
1218 netdev_upper_dev_unlink(slave_dev
, bond_dev
);
1219 slave_dev
->flags
&= ~IFF_SLAVE
;
1220 rtmsg_ifinfo(RTM_NEWLINK
, slave_dev
, IFF_SLAVE
, GFP_KERNEL
);
1223 /* enslave device <slave> to bond device <master> */
1224 int bond_enslave(struct net_device
*bond_dev
, struct net_device
*slave_dev
)
1226 struct bonding
*bond
= netdev_priv(bond_dev
);
1227 const struct net_device_ops
*slave_ops
= slave_dev
->netdev_ops
;
1228 struct slave
*new_slave
= NULL
, *prev_slave
;
1229 struct sockaddr addr
;
1233 if (!bond
->params
.use_carrier
&&
1234 slave_dev
->ethtool_ops
->get_link
== NULL
&&
1235 slave_ops
->ndo_do_ioctl
== NULL
) {
1236 pr_warning("%s: Warning: no link monitoring support for %s\n",
1237 bond_dev
->name
, slave_dev
->name
);
1240 /* already enslaved */
1241 if (slave_dev
->flags
& IFF_SLAVE
) {
1242 pr_debug("Error, Device was already enslaved\n");
1246 /* vlan challenged mutual exclusion */
1247 /* no need to lock since we're protected by rtnl_lock */
1248 if (slave_dev
->features
& NETIF_F_VLAN_CHALLENGED
) {
1249 pr_debug("%s: NETIF_F_VLAN_CHALLENGED\n", slave_dev
->name
);
1250 if (vlan_uses_dev(bond_dev
)) {
1251 pr_err("%s: Error: cannot enslave VLAN challenged slave %s on VLAN enabled bond %s\n",
1252 bond_dev
->name
, slave_dev
->name
, bond_dev
->name
);
1255 pr_warning("%s: Warning: enslaved VLAN challenged slave %s. Adding VLANs will be blocked as long as %s is part of bond %s\n",
1256 bond_dev
->name
, slave_dev
->name
,
1257 slave_dev
->name
, bond_dev
->name
);
1260 pr_debug("%s: ! NETIF_F_VLAN_CHALLENGED\n", slave_dev
->name
);
1264 * Old ifenslave binaries are no longer supported. These can
1265 * be identified with moderate accuracy by the state of the slave:
1266 * the current ifenslave will set the interface down prior to
1267 * enslaving it; the old ifenslave will not.
1269 if ((slave_dev
->flags
& IFF_UP
)) {
1270 pr_err("%s is up. This may be due to an out of date ifenslave.\n",
1273 goto err_undo_flags
;
1276 /* set bonding device ether type by slave - bonding netdevices are
1277 * created with ether_setup, so when the slave type is not ARPHRD_ETHER
1278 * there is a need to override some of the type dependent attribs/funcs.
1280 * bond ether type mutual exclusion - don't allow slaves of dissimilar
1281 * ether type (eg ARPHRD_ETHER and ARPHRD_INFINIBAND) share the same bond
1283 if (!bond_has_slaves(bond
)) {
1284 if (bond_dev
->type
!= slave_dev
->type
) {
1285 pr_debug("%s: change device type from %d to %d\n",
1287 bond_dev
->type
, slave_dev
->type
);
1289 res
= call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE
,
1291 res
= notifier_to_errno(res
);
1293 pr_err("%s: refused to change device type\n",
1296 goto err_undo_flags
;
1299 /* Flush unicast and multicast addresses */
1300 dev_uc_flush(bond_dev
);
1301 dev_mc_flush(bond_dev
);
1303 if (slave_dev
->type
!= ARPHRD_ETHER
)
1304 bond_setup_by_slave(bond_dev
, slave_dev
);
1306 ether_setup(bond_dev
);
1307 bond_dev
->priv_flags
&= ~IFF_TX_SKB_SHARING
;
1310 call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE
,
1313 } else if (bond_dev
->type
!= slave_dev
->type
) {
1314 pr_err("%s ether type (%d) is different from other slaves (%d), can not enslave it.\n",
1316 slave_dev
->type
, bond_dev
->type
);
1318 goto err_undo_flags
;
1321 if (slave_ops
->ndo_set_mac_address
== NULL
) {
1322 if (!bond_has_slaves(bond
)) {
1323 pr_warning("%s: Warning: The first slave device specified does not support setting the MAC address. Setting fail_over_mac to active.",
1325 bond
->params
.fail_over_mac
= BOND_FOM_ACTIVE
;
1326 } else if (bond
->params
.fail_over_mac
!= BOND_FOM_ACTIVE
) {
1327 pr_err("%s: Error: The slave device specified does not support setting the MAC address, but fail_over_mac is not set to active.\n",
1330 goto err_undo_flags
;
1334 call_netdevice_notifiers(NETDEV_JOIN
, slave_dev
);
1336 /* If this is the first slave, then we need to set the master's hardware
1337 * address to be the same as the slave's. */
1338 if (!bond_has_slaves(bond
) &&
1339 bond
->dev
->addr_assign_type
== NET_ADDR_RANDOM
)
1340 bond_set_dev_addr(bond
->dev
, slave_dev
);
1342 new_slave
= kzalloc(sizeof(struct slave
), GFP_KERNEL
);
1345 goto err_undo_flags
;
1348 * Set the new_slave's queue_id to be zero. Queue ID mapping
1349 * is set via sysfs or module option if desired.
1351 new_slave
->queue_id
= 0;
1353 /* Save slave's original mtu and then set it to match the bond */
1354 new_slave
->original_mtu
= slave_dev
->mtu
;
1355 res
= dev_set_mtu(slave_dev
, bond
->dev
->mtu
);
1357 pr_debug("Error %d calling dev_set_mtu\n", res
);
1362 * Save slave's original ("permanent") mac address for modes
1363 * that need it, and for restoring it upon release, and then
1364 * set it to the master's address
1366 memcpy(new_slave
->perm_hwaddr
, slave_dev
->dev_addr
, ETH_ALEN
);
1368 if (!bond
->params
.fail_over_mac
) {
1370 * Set slave to master's mac address. The application already
1371 * set the master's mac address to that of the first slave
1373 memcpy(addr
.sa_data
, bond_dev
->dev_addr
, bond_dev
->addr_len
);
1374 addr
.sa_family
= slave_dev
->type
;
1375 res
= dev_set_mac_address(slave_dev
, &addr
);
1377 pr_debug("Error %d calling set_mac_address\n", res
);
1378 goto err_restore_mtu
;
1382 /* open the slave since the application closed it */
1383 res
= dev_open(slave_dev
);
1385 pr_debug("Opening slave %s failed\n", slave_dev
->name
);
1386 goto err_restore_mac
;
1389 new_slave
->bond
= bond
;
1390 new_slave
->dev
= slave_dev
;
1391 slave_dev
->priv_flags
|= IFF_BONDING
;
1393 if (bond_is_lb(bond
)) {
1394 /* bond_alb_init_slave() must be called before all other stages since
1395 * it might fail and we do not want to have to undo everything
1397 res
= bond_alb_init_slave(bond
, new_slave
);
1402 /* If the mode USES_PRIMARY, then the following is handled by
1403 * bond_change_active_slave().
1405 if (!USES_PRIMARY(bond
->params
.mode
)) {
1406 /* set promiscuity level to new slave */
1407 if (bond_dev
->flags
& IFF_PROMISC
) {
1408 res
= dev_set_promiscuity(slave_dev
, 1);
1413 /* set allmulti level to new slave */
1414 if (bond_dev
->flags
& IFF_ALLMULTI
) {
1415 res
= dev_set_allmulti(slave_dev
, 1);
1420 netif_addr_lock_bh(bond_dev
);
1422 dev_mc_sync_multiple(slave_dev
, bond_dev
);
1423 dev_uc_sync_multiple(slave_dev
, bond_dev
);
1425 netif_addr_unlock_bh(bond_dev
);
1428 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
1429 /* add lacpdu mc addr to mc list */
1430 u8 lacpdu_multicast
[ETH_ALEN
] = MULTICAST_LACPDU_ADDR
;
1432 dev_mc_add(slave_dev
, lacpdu_multicast
);
1435 res
= vlan_vids_add_by_dev(slave_dev
, bond_dev
);
1437 pr_err("%s: Error: Couldn't add bond vlan ids to %s\n",
1438 bond_dev
->name
, slave_dev
->name
);
1442 prev_slave
= bond_last_slave(bond
);
1444 new_slave
->delay
= 0;
1445 new_slave
->link_failure_count
= 0;
1447 bond_update_speed_duplex(new_slave
);
1449 new_slave
->last_arp_rx
= jiffies
-
1450 (msecs_to_jiffies(bond
->params
.arp_interval
) + 1);
1451 for (i
= 0; i
< BOND_MAX_ARP_TARGETS
; i
++)
1452 new_slave
->target_last_arp_rx
[i
] = new_slave
->last_arp_rx
;
1454 if (bond
->params
.miimon
&& !bond
->params
.use_carrier
) {
1455 link_reporting
= bond_check_dev_link(bond
, slave_dev
, 1);
1457 if ((link_reporting
== -1) && !bond
->params
.arp_interval
) {
1459 * miimon is set but a bonded network driver
1460 * does not support ETHTOOL/MII and
1461 * arp_interval is not set. Note: if
1462 * use_carrier is enabled, we will never go
1463 * here (because netif_carrier is always
1464 * supported); thus, we don't need to change
1465 * the messages for netif_carrier.
1467 pr_warning("%s: Warning: MII and ETHTOOL support not available for interface %s, and arp_interval/arp_ip_target module parameters not specified, thus bonding will not detect link failures! see bonding.txt for details.\n",
1468 bond_dev
->name
, slave_dev
->name
);
1469 } else if (link_reporting
== -1) {
1470 /* unable get link status using mii/ethtool */
1471 pr_warning("%s: Warning: can't get link status from interface %s; the network driver associated with this interface does not support MII or ETHTOOL link status reporting, thus miimon has no effect on this interface.\n",
1472 bond_dev
->name
, slave_dev
->name
);
1476 /* check for initial state */
1477 if (bond
->params
.miimon
) {
1478 if (bond_check_dev_link(bond
, slave_dev
, 0) == BMSR_LSTATUS
) {
1479 if (bond
->params
.updelay
) {
1480 new_slave
->link
= BOND_LINK_BACK
;
1481 new_slave
->delay
= bond
->params
.updelay
;
1483 new_slave
->link
= BOND_LINK_UP
;
1486 new_slave
->link
= BOND_LINK_DOWN
;
1488 } else if (bond
->params
.arp_interval
) {
1489 new_slave
->link
= (netif_carrier_ok(slave_dev
) ?
1490 BOND_LINK_UP
: BOND_LINK_DOWN
);
1492 new_slave
->link
= BOND_LINK_UP
;
1495 if (new_slave
->link
!= BOND_LINK_DOWN
)
1496 new_slave
->jiffies
= jiffies
;
1497 pr_debug("Initial state of slave_dev is BOND_LINK_%s\n",
1498 new_slave
->link
== BOND_LINK_DOWN
? "DOWN" :
1499 (new_slave
->link
== BOND_LINK_UP
? "UP" : "BACK"));
1501 if (USES_PRIMARY(bond
->params
.mode
) && bond
->params
.primary
[0]) {
1502 /* if there is a primary slave, remember it */
1503 if (strcmp(bond
->params
.primary
, new_slave
->dev
->name
) == 0) {
1504 bond
->primary_slave
= new_slave
;
1505 bond
->force_primary
= true;
1509 switch (bond
->params
.mode
) {
1510 case BOND_MODE_ACTIVEBACKUP
:
1511 bond_set_slave_inactive_flags(new_slave
);
1513 case BOND_MODE_8023AD
:
1514 /* in 802.3ad mode, the internal mechanism
1515 * will activate the slaves in the selected
1518 bond_set_slave_inactive_flags(new_slave
);
1519 /* if this is the first slave */
1521 SLAVE_AD_INFO(new_slave
).id
= 1;
1522 /* Initialize AD with the number of times that the AD timer is called in 1 second
1523 * can be called only after the mac address of the bond is set
1525 bond_3ad_initialize(bond
, 1000/AD_TIMER_INTERVAL
);
1527 SLAVE_AD_INFO(new_slave
).id
=
1528 SLAVE_AD_INFO(prev_slave
).id
+ 1;
1531 bond_3ad_bind_slave(new_slave
);
1535 bond_set_active_slave(new_slave
);
1536 bond_set_slave_inactive_flags(new_slave
);
1539 pr_debug("This slave is always active in trunk mode\n");
1541 /* always active in trunk mode */
1542 bond_set_active_slave(new_slave
);
1544 /* In trunking mode there is little meaning to curr_active_slave
1545 * anyway (it holds no special properties of the bond device),
1546 * so we can change it without calling change_active_interface()
1548 if (!bond
->curr_active_slave
&& new_slave
->link
== BOND_LINK_UP
)
1549 rcu_assign_pointer(bond
->curr_active_slave
, new_slave
);
1552 } /* switch(bond_mode) */
1554 #ifdef CONFIG_NET_POLL_CONTROLLER
1555 slave_dev
->npinfo
= bond
->dev
->npinfo
;
1556 if (slave_dev
->npinfo
) {
1557 if (slave_enable_netpoll(new_slave
)) {
1558 read_unlock(&bond
->lock
);
1559 pr_info("Error, %s: master_dev is using netpoll, "
1560 "but new slave device does not support netpoll.\n",
1568 res
= netdev_rx_handler_register(slave_dev
, bond_handle_frame
,
1571 pr_debug("Error %d calling netdev_rx_handler_register\n", res
);
1575 res
= bond_master_upper_dev_link(bond_dev
, slave_dev
, new_slave
);
1577 pr_debug("Error %d calling bond_master_upper_dev_link\n", res
);
1578 goto err_unregister
;
1582 bond_compute_features(bond
);
1583 bond_set_carrier(bond
);
1585 if (USES_PRIMARY(bond
->params
.mode
)) {
1586 write_lock_bh(&bond
->curr_slave_lock
);
1587 bond_select_active_slave(bond
);
1588 write_unlock_bh(&bond
->curr_slave_lock
);
1591 pr_info("%s: enslaving %s as a%s interface with a%s link.\n",
1592 bond_dev
->name
, slave_dev
->name
,
1593 bond_is_active_slave(new_slave
) ? "n active" : " backup",
1594 new_slave
->link
!= BOND_LINK_DOWN
? "n up" : " down");
1596 /* enslave is successful */
1599 /* Undo stages on error */
1601 netdev_rx_handler_unregister(slave_dev
);
1604 if (!USES_PRIMARY(bond
->params
.mode
))
1605 bond_hw_addr_flush(bond_dev
, slave_dev
);
1607 vlan_vids_del_by_dev(slave_dev
, bond_dev
);
1608 if (bond
->primary_slave
== new_slave
)
1609 bond
->primary_slave
= NULL
;
1610 if (bond
->curr_active_slave
== new_slave
) {
1611 write_lock_bh(&bond
->curr_slave_lock
);
1612 bond_change_active_slave(bond
, NULL
);
1613 bond_select_active_slave(bond
);
1614 write_unlock_bh(&bond
->curr_slave_lock
);
1616 slave_disable_netpoll(new_slave
);
1619 slave_dev
->priv_flags
&= ~IFF_BONDING
;
1620 dev_close(slave_dev
);
1623 if (!bond
->params
.fail_over_mac
) {
1624 /* XXX TODO - fom follow mode needs to change master's
1625 * MAC if this slave's MAC is in use by the bond, or at
1626 * least print a warning.
1628 memcpy(addr
.sa_data
, new_slave
->perm_hwaddr
, ETH_ALEN
);
1629 addr
.sa_family
= slave_dev
->type
;
1630 dev_set_mac_address(slave_dev
, &addr
);
1634 dev_set_mtu(slave_dev
, new_slave
->original_mtu
);
1640 /* Enslave of first slave has failed and we need to fix master's mac */
1641 if (!bond_has_slaves(bond
) &&
1642 ether_addr_equal(bond_dev
->dev_addr
, slave_dev
->dev_addr
))
1643 eth_hw_addr_random(bond_dev
);
1649 * Try to release the slave device <slave> from the bond device <master>
1650 * It is legal to access curr_active_slave without a lock because all the function
1651 * is write-locked. If "all" is true it means that the function is being called
1652 * while destroying a bond interface and all slaves are being released.
1654 * The rules for slave state should be:
1655 * for Active/Backup:
1656 * Active stays on all backups go down
1657 * for Bonded connections:
1658 * The first up interface should be left on and all others downed.
1660 static int __bond_release_one(struct net_device
*bond_dev
,
1661 struct net_device
*slave_dev
,
1664 struct bonding
*bond
= netdev_priv(bond_dev
);
1665 struct slave
*slave
, *oldcurrent
;
1666 struct sockaddr addr
;
1667 int old_flags
= bond_dev
->flags
;
1668 netdev_features_t old_features
= bond_dev
->features
;
1670 /* slave is not a slave or master is not master of this slave */
1671 if (!(slave_dev
->flags
& IFF_SLAVE
) ||
1672 !netdev_has_upper_dev(slave_dev
, bond_dev
)) {
1673 pr_err("%s: Error: cannot release %s.\n",
1674 bond_dev
->name
, slave_dev
->name
);
1680 slave
= bond_get_slave_by_dev(bond
, slave_dev
);
1682 /* not a slave of this bond */
1683 pr_info("%s: %s not enslaved\n",
1684 bond_dev
->name
, slave_dev
->name
);
1685 unblock_netpoll_tx();
1689 /* release the slave from its bond */
1692 bond_upper_dev_unlink(bond_dev
, slave_dev
);
1693 /* unregister rx_handler early so bond_handle_frame wouldn't be called
1694 * for this slave anymore.
1696 netdev_rx_handler_unregister(slave_dev
);
1697 write_lock_bh(&bond
->lock
);
1699 /* Inform AD package of unbinding of slave. */
1700 if (bond
->params
.mode
== BOND_MODE_8023AD
)
1701 bond_3ad_unbind_slave(slave
);
1703 write_unlock_bh(&bond
->lock
);
1705 pr_info("%s: releasing %s interface %s\n",
1707 bond_is_active_slave(slave
) ? "active" : "backup",
1710 oldcurrent
= bond
->curr_active_slave
;
1712 bond
->current_arp_slave
= NULL
;
1714 if (!all
&& !bond
->params
.fail_over_mac
) {
1715 if (ether_addr_equal(bond_dev
->dev_addr
, slave
->perm_hwaddr
) &&
1716 bond_has_slaves(bond
))
1717 pr_warn("%s: Warning: the permanent HWaddr of %s - %pM - is still in use by %s. Set the HWaddr of %s to a different address to avoid conflicts.\n",
1718 bond_dev
->name
, slave_dev
->name
,
1720 bond_dev
->name
, slave_dev
->name
);
1723 if (bond
->primary_slave
== slave
)
1724 bond
->primary_slave
= NULL
;
1726 if (oldcurrent
== slave
) {
1727 write_lock_bh(&bond
->curr_slave_lock
);
1728 bond_change_active_slave(bond
, NULL
);
1729 write_unlock_bh(&bond
->curr_slave_lock
);
1732 if (bond_is_lb(bond
)) {
1733 /* Must be called only after the slave has been
1734 * detached from the list and the curr_active_slave
1735 * has been cleared (if our_slave == old_current),
1736 * but before a new active slave is selected.
1738 bond_alb_deinit_slave(bond
, slave
);
1742 rcu_assign_pointer(bond
->curr_active_slave
, NULL
);
1743 } else if (oldcurrent
== slave
) {
1745 * Note that we hold RTNL over this sequence, so there
1746 * is no concern that another slave add/remove event
1749 write_lock_bh(&bond
->curr_slave_lock
);
1751 bond_select_active_slave(bond
);
1753 write_unlock_bh(&bond
->curr_slave_lock
);
1756 if (!bond_has_slaves(bond
)) {
1757 bond_set_carrier(bond
);
1758 eth_hw_addr_random(bond_dev
);
1760 if (vlan_uses_dev(bond_dev
)) {
1761 pr_warning("%s: Warning: clearing HW address of %s while it still has VLANs.\n",
1762 bond_dev
->name
, bond_dev
->name
);
1763 pr_warning("%s: When re-adding slaves, make sure the bond's HW address matches its VLANs'.\n",
1768 unblock_netpoll_tx();
1771 if (!bond_has_slaves(bond
)) {
1772 call_netdevice_notifiers(NETDEV_CHANGEADDR
, bond
->dev
);
1773 call_netdevice_notifiers(NETDEV_RELEASE
, bond
->dev
);
1776 bond_compute_features(bond
);
1777 if (!(bond_dev
->features
& NETIF_F_VLAN_CHALLENGED
) &&
1778 (old_features
& NETIF_F_VLAN_CHALLENGED
))
1779 pr_info("%s: last VLAN challenged slave %s left bond %s. VLAN blocking is removed\n",
1780 bond_dev
->name
, slave_dev
->name
, bond_dev
->name
);
1782 /* must do this from outside any spinlocks */
1783 vlan_vids_del_by_dev(slave_dev
, bond_dev
);
1785 /* If the mode USES_PRIMARY, then this cases was handled above by
1786 * bond_change_active_slave(..., NULL)
1788 if (!USES_PRIMARY(bond
->params
.mode
)) {
1789 /* unset promiscuity level from slave
1790 * NOTE: The NETDEV_CHANGEADDR call above may change the value
1791 * of the IFF_PROMISC flag in the bond_dev, but we need the
1792 * value of that flag before that change, as that was the value
1793 * when this slave was attached, so we cache at the start of the
1794 * function and use it here. Same goes for ALLMULTI below
1796 if (old_flags
& IFF_PROMISC
)
1797 dev_set_promiscuity(slave_dev
, -1);
1799 /* unset allmulti level from slave */
1800 if (old_flags
& IFF_ALLMULTI
)
1801 dev_set_allmulti(slave_dev
, -1);
1803 bond_hw_addr_flush(bond_dev
, slave_dev
);
1806 slave_disable_netpoll(slave
);
1808 /* close slave before restoring its mac address */
1809 dev_close(slave_dev
);
1811 if (bond
->params
.fail_over_mac
!= BOND_FOM_ACTIVE
) {
1812 /* restore original ("permanent") mac address */
1813 memcpy(addr
.sa_data
, slave
->perm_hwaddr
, ETH_ALEN
);
1814 addr
.sa_family
= slave_dev
->type
;
1815 dev_set_mac_address(slave_dev
, &addr
);
1818 dev_set_mtu(slave_dev
, slave
->original_mtu
);
1820 slave_dev
->priv_flags
&= ~IFF_BONDING
;
1824 return 0; /* deletion OK */
1827 /* A wrapper used because of ndo_del_link */
1828 int bond_release(struct net_device
*bond_dev
, struct net_device
*slave_dev
)
1830 return __bond_release_one(bond_dev
, slave_dev
, false);
1834 * First release a slave and then destroy the bond if no more slaves are left.
1835 * Must be under rtnl_lock when this function is called.
1837 static int bond_release_and_destroy(struct net_device
*bond_dev
,
1838 struct net_device
*slave_dev
)
1840 struct bonding
*bond
= netdev_priv(bond_dev
);
1843 ret
= bond_release(bond_dev
, slave_dev
);
1844 if (ret
== 0 && !bond_has_slaves(bond
)) {
1845 bond_dev
->priv_flags
|= IFF_DISABLE_NETPOLL
;
1846 pr_info("%s: destroying bond %s.\n",
1847 bond_dev
->name
, bond_dev
->name
);
1848 unregister_netdevice(bond_dev
);
1853 static int bond_info_query(struct net_device
*bond_dev
, struct ifbond
*info
)
1855 struct bonding
*bond
= netdev_priv(bond_dev
);
1857 info
->bond_mode
= bond
->params
.mode
;
1858 info
->miimon
= bond
->params
.miimon
;
1860 read_lock(&bond
->lock
);
1861 info
->num_slaves
= bond
->slave_cnt
;
1862 read_unlock(&bond
->lock
);
1867 static int bond_slave_info_query(struct net_device
*bond_dev
, struct ifslave
*info
)
1869 struct bonding
*bond
= netdev_priv(bond_dev
);
1870 struct list_head
*iter
;
1871 int i
= 0, res
= -ENODEV
;
1872 struct slave
*slave
;
1874 read_lock(&bond
->lock
);
1875 bond_for_each_slave(bond
, slave
, iter
) {
1876 if (i
++ == (int)info
->slave_id
) {
1878 strcpy(info
->slave_name
, slave
->dev
->name
);
1879 info
->link
= slave
->link
;
1880 info
->state
= bond_slave_state(slave
);
1881 info
->link_failure_count
= slave
->link_failure_count
;
1885 read_unlock(&bond
->lock
);
1890 /*-------------------------------- Monitoring -------------------------------*/
1893 static int bond_miimon_inspect(struct bonding
*bond
)
1895 int link_state
, commit
= 0;
1896 struct list_head
*iter
;
1897 struct slave
*slave
;
1898 bool ignore_updelay
;
1900 ignore_updelay
= !bond
->curr_active_slave
? true : false;
1902 bond_for_each_slave_rcu(bond
, slave
, iter
) {
1903 slave
->new_link
= BOND_LINK_NOCHANGE
;
1905 link_state
= bond_check_dev_link(bond
, slave
->dev
, 0);
1907 switch (slave
->link
) {
1912 slave
->link
= BOND_LINK_FAIL
;
1913 slave
->delay
= bond
->params
.downdelay
;
1915 pr_info("%s: link status down for %sinterface %s, disabling it in %d ms.\n",
1917 (bond
->params
.mode
==
1918 BOND_MODE_ACTIVEBACKUP
) ?
1919 (bond_is_active_slave(slave
) ?
1920 "active " : "backup ") : "",
1922 bond
->params
.downdelay
* bond
->params
.miimon
);
1925 case BOND_LINK_FAIL
:
1928 * recovered before downdelay expired
1930 slave
->link
= BOND_LINK_UP
;
1931 slave
->jiffies
= jiffies
;
1932 pr_info("%s: link status up again after %d ms for interface %s.\n",
1934 (bond
->params
.downdelay
- slave
->delay
) *
1935 bond
->params
.miimon
,
1940 if (slave
->delay
<= 0) {
1941 slave
->new_link
= BOND_LINK_DOWN
;
1949 case BOND_LINK_DOWN
:
1953 slave
->link
= BOND_LINK_BACK
;
1954 slave
->delay
= bond
->params
.updelay
;
1957 pr_info("%s: link status up for interface %s, enabling it in %d ms.\n",
1958 bond
->dev
->name
, slave
->dev
->name
,
1959 ignore_updelay
? 0 :
1960 bond
->params
.updelay
*
1961 bond
->params
.miimon
);
1964 case BOND_LINK_BACK
:
1966 slave
->link
= BOND_LINK_DOWN
;
1967 pr_info("%s: link status down again after %d ms for interface %s.\n",
1969 (bond
->params
.updelay
- slave
->delay
) *
1970 bond
->params
.miimon
,
1979 if (slave
->delay
<= 0) {
1980 slave
->new_link
= BOND_LINK_UP
;
1982 ignore_updelay
= false;
1994 static void bond_miimon_commit(struct bonding
*bond
)
1996 struct list_head
*iter
;
1997 struct slave
*slave
;
1999 bond_for_each_slave(bond
, slave
, iter
) {
2000 switch (slave
->new_link
) {
2001 case BOND_LINK_NOCHANGE
:
2005 slave
->link
= BOND_LINK_UP
;
2006 slave
->jiffies
= jiffies
;
2008 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
2009 /* prevent it from being the active one */
2010 bond_set_backup_slave(slave
);
2011 } else if (bond
->params
.mode
!= BOND_MODE_ACTIVEBACKUP
) {
2012 /* make it immediately active */
2013 bond_set_active_slave(slave
);
2014 } else if (slave
!= bond
->primary_slave
) {
2015 /* prevent it from being the active one */
2016 bond_set_backup_slave(slave
);
2019 pr_info("%s: link status definitely up for interface %s, %u Mbps %s duplex.\n",
2020 bond
->dev
->name
, slave
->dev
->name
,
2021 slave
->speed
== SPEED_UNKNOWN
? 0 : slave
->speed
,
2022 slave
->duplex
? "full" : "half");
2024 /* notify ad that the link status has changed */
2025 if (bond
->params
.mode
== BOND_MODE_8023AD
)
2026 bond_3ad_handle_link_change(slave
, BOND_LINK_UP
);
2028 if (bond_is_lb(bond
))
2029 bond_alb_handle_link_change(bond
, slave
,
2032 if (!bond
->curr_active_slave
||
2033 (slave
== bond
->primary_slave
))
2038 case BOND_LINK_DOWN
:
2039 if (slave
->link_failure_count
< UINT_MAX
)
2040 slave
->link_failure_count
++;
2042 slave
->link
= BOND_LINK_DOWN
;
2044 if (bond
->params
.mode
== BOND_MODE_ACTIVEBACKUP
||
2045 bond
->params
.mode
== BOND_MODE_8023AD
)
2046 bond_set_slave_inactive_flags(slave
);
2048 pr_info("%s: link status definitely down for interface %s, disabling it\n",
2049 bond
->dev
->name
, slave
->dev
->name
);
2051 if (bond
->params
.mode
== BOND_MODE_8023AD
)
2052 bond_3ad_handle_link_change(slave
,
2055 if (bond_is_lb(bond
))
2056 bond_alb_handle_link_change(bond
, slave
,
2059 if (slave
== bond
->curr_active_slave
)
2065 pr_err("%s: invalid new link %d on slave %s\n",
2066 bond
->dev
->name
, slave
->new_link
,
2068 slave
->new_link
= BOND_LINK_NOCHANGE
;
2076 write_lock_bh(&bond
->curr_slave_lock
);
2077 bond_select_active_slave(bond
);
2078 write_unlock_bh(&bond
->curr_slave_lock
);
2079 unblock_netpoll_tx();
2082 bond_set_carrier(bond
);
2088 * Really a wrapper that splits the mii monitor into two phases: an
2089 * inspection, then (if inspection indicates something needs to be done)
2090 * an acquisition of appropriate locks followed by a commit phase to
2091 * implement whatever link state changes are indicated.
2093 void bond_mii_monitor(struct work_struct
*work
)
2095 struct bonding
*bond
= container_of(work
, struct bonding
,
2097 bool should_notify_peers
= false;
2098 unsigned long delay
;
2100 delay
= msecs_to_jiffies(bond
->params
.miimon
);
2102 if (!bond_has_slaves(bond
))
2107 should_notify_peers
= bond_should_notify_peers(bond
);
2109 if (bond_miimon_inspect(bond
)) {
2112 /* Race avoidance with bond_close cancel of workqueue */
2113 if (!rtnl_trylock()) {
2115 should_notify_peers
= false;
2119 bond_miimon_commit(bond
);
2121 rtnl_unlock(); /* might sleep, hold no other locks */
2126 if (bond
->params
.miimon
)
2127 queue_delayed_work(bond
->wq
, &bond
->mii_work
, delay
);
2129 if (should_notify_peers
) {
2130 if (!rtnl_trylock())
2132 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS
, bond
->dev
);
2137 static bool bond_has_this_ip(struct bonding
*bond
, __be32 ip
)
2139 struct net_device
*upper
;
2140 struct list_head
*iter
;
2143 if (ip
== bond_confirm_addr(bond
->dev
, 0, ip
))
2147 netdev_for_each_all_upper_dev_rcu(bond
->dev
, upper
, iter
) {
2148 if (ip
== bond_confirm_addr(upper
, 0, ip
)) {
2159 * We go to the (large) trouble of VLAN tagging ARP frames because
2160 * switches in VLAN mode (especially if ports are configured as
2161 * "native" to a VLAN) might not pass non-tagged frames.
2163 static void bond_arp_send(struct net_device
*slave_dev
, int arp_op
, __be32 dest_ip
, __be32 src_ip
, unsigned short vlan_id
)
2165 struct sk_buff
*skb
;
2167 pr_debug("arp %d on slave %s: dst %pI4 src %pI4 vid %d\n", arp_op
,
2168 slave_dev
->name
, &dest_ip
, &src_ip
, vlan_id
);
2170 skb
= arp_create(arp_op
, ETH_P_ARP
, dest_ip
, slave_dev
, src_ip
,
2171 NULL
, slave_dev
->dev_addr
, NULL
);
2174 pr_err("ARP packet allocation failed\n");
2178 skb
= vlan_put_tag(skb
, htons(ETH_P_8021Q
), vlan_id
);
2180 pr_err("failed to insert VLAN tag\n");
2188 static void bond_arp_send_all(struct bonding
*bond
, struct slave
*slave
)
2190 struct net_device
*upper
, *vlan_upper
;
2191 struct list_head
*iter
, *vlan_iter
;
2193 __be32
*targets
= bond
->params
.arp_targets
, addr
;
2196 for (i
= 0; i
< BOND_MAX_ARP_TARGETS
&& targets
[i
]; i
++) {
2197 pr_debug("basa: target %pI4\n", &targets
[i
]);
2199 /* Find out through which dev should the packet go */
2200 rt
= ip_route_output(dev_net(bond
->dev
), targets
[i
], 0,
2203 pr_debug("%s: no route to arp_ip_target %pI4\n",
2204 bond
->dev
->name
, &targets
[i
]);
2210 /* bond device itself */
2211 if (rt
->dst
.dev
== bond
->dev
)
2215 /* first we search only for vlan devices. for every vlan
2216 * found we verify its upper dev list, searching for the
2217 * rt->dst.dev. If found we save the tag of the vlan and
2218 * proceed to send the packet.
2222 netdev_for_each_all_upper_dev_rcu(bond
->dev
, vlan_upper
,
2224 if (!is_vlan_dev(vlan_upper
))
2226 netdev_for_each_all_upper_dev_rcu(vlan_upper
, upper
,
2228 if (upper
== rt
->dst
.dev
) {
2229 vlan_id
= vlan_dev_vlan_id(vlan_upper
);
2236 /* if the device we're looking for is not on top of any of
2237 * our upper vlans, then just search for any dev that
2238 * matches, and in case it's a vlan - save the id
2240 netdev_for_each_all_upper_dev_rcu(bond
->dev
, upper
, iter
) {
2241 if (upper
== rt
->dst
.dev
) {
2242 /* if it's a vlan - get its VID */
2243 if (is_vlan_dev(upper
))
2244 vlan_id
= vlan_dev_vlan_id(upper
);
2252 /* Not our device - skip */
2253 pr_debug("%s: no path to arp_ip_target %pI4 via rt.dev %s\n",
2254 bond
->dev
->name
, &targets
[i
],
2255 rt
->dst
.dev
? rt
->dst
.dev
->name
: "NULL");
2261 addr
= bond_confirm_addr(rt
->dst
.dev
, targets
[i
], 0);
2263 bond_arp_send(slave
->dev
, ARPOP_REQUEST
, targets
[i
],
2268 static void bond_validate_arp(struct bonding
*bond
, struct slave
*slave
, __be32 sip
, __be32 tip
)
2272 if (!sip
|| !bond_has_this_ip(bond
, tip
)) {
2273 pr_debug("bva: sip %pI4 tip %pI4 not found\n", &sip
, &tip
);
2277 i
= bond_get_targets_ip(bond
->params
.arp_targets
, sip
);
2279 pr_debug("bva: sip %pI4 not found in targets\n", &sip
);
2282 slave
->last_arp_rx
= jiffies
;
2283 slave
->target_last_arp_rx
[i
] = jiffies
;
2286 int bond_arp_rcv(const struct sk_buff
*skb
, struct bonding
*bond
,
2287 struct slave
*slave
)
2289 struct arphdr
*arp
= (struct arphdr
*)skb
->data
;
2290 unsigned char *arp_ptr
;
2294 if (skb
->protocol
!= __cpu_to_be16(ETH_P_ARP
))
2295 return RX_HANDLER_ANOTHER
;
2297 read_lock(&bond
->lock
);
2299 if (!slave_do_arp_validate(bond
, slave
))
2302 alen
= arp_hdr_len(bond
->dev
);
2304 pr_debug("bond_arp_rcv: bond %s skb->dev %s\n",
2305 bond
->dev
->name
, skb
->dev
->name
);
2307 if (alen
> skb_headlen(skb
)) {
2308 arp
= kmalloc(alen
, GFP_ATOMIC
);
2311 if (skb_copy_bits(skb
, 0, arp
, alen
) < 0)
2315 if (arp
->ar_hln
!= bond
->dev
->addr_len
||
2316 skb
->pkt_type
== PACKET_OTHERHOST
||
2317 skb
->pkt_type
== PACKET_LOOPBACK
||
2318 arp
->ar_hrd
!= htons(ARPHRD_ETHER
) ||
2319 arp
->ar_pro
!= htons(ETH_P_IP
) ||
2323 arp_ptr
= (unsigned char *)(arp
+ 1);
2324 arp_ptr
+= bond
->dev
->addr_len
;
2325 memcpy(&sip
, arp_ptr
, 4);
2326 arp_ptr
+= 4 + bond
->dev
->addr_len
;
2327 memcpy(&tip
, arp_ptr
, 4);
2329 pr_debug("bond_arp_rcv: %s %s/%d av %d sv %d sip %pI4 tip %pI4\n",
2330 bond
->dev
->name
, slave
->dev
->name
, bond_slave_state(slave
),
2331 bond
->params
.arp_validate
, slave_do_arp_validate(bond
, slave
),
2335 * Backup slaves won't see the ARP reply, but do come through
2336 * here for each ARP probe (so we swap the sip/tip to validate
2337 * the probe). In a "redundant switch, common router" type of
2338 * configuration, the ARP probe will (hopefully) travel from
2339 * the active, through one switch, the router, then the other
2340 * switch before reaching the backup.
2342 * We 'trust' the arp requests if there is an active slave and
2343 * it received valid arp reply(s) after it became active. This
2344 * is done to avoid endless looping when we can't reach the
2345 * arp_ip_target and fool ourselves with our own arp requests.
2347 if (bond_is_active_slave(slave
))
2348 bond_validate_arp(bond
, slave
, sip
, tip
);
2349 else if (bond
->curr_active_slave
&&
2350 time_after(slave_last_rx(bond
, bond
->curr_active_slave
),
2351 bond
->curr_active_slave
->jiffies
))
2352 bond_validate_arp(bond
, slave
, tip
, sip
);
2355 read_unlock(&bond
->lock
);
2356 if (arp
!= (struct arphdr
*)skb
->data
)
2358 return RX_HANDLER_ANOTHER
;
2361 /* function to verify if we're in the arp_interval timeslice, returns true if
2362 * (last_act - arp_interval) <= jiffies <= (last_act + mod * arp_interval +
2363 * arp_interval/2) . the arp_interval/2 is needed for really fast networks.
2365 static bool bond_time_in_interval(struct bonding
*bond
, unsigned long last_act
,
2368 int delta_in_ticks
= msecs_to_jiffies(bond
->params
.arp_interval
);
2370 return time_in_range(jiffies
,
2371 last_act
- delta_in_ticks
,
2372 last_act
+ mod
* delta_in_ticks
+ delta_in_ticks
/2);
2376 * this function is called regularly to monitor each slave's link
2377 * ensuring that traffic is being sent and received when arp monitoring
2378 * is used in load-balancing mode. if the adapter has been dormant, then an
2379 * arp is transmitted to generate traffic. see activebackup_arp_monitor for
2380 * arp monitoring in active backup mode.
2382 void bond_loadbalance_arp_mon(struct work_struct
*work
)
2384 struct bonding
*bond
= container_of(work
, struct bonding
,
2386 struct slave
*slave
, *oldcurrent
;
2387 struct list_head
*iter
;
2388 int do_failover
= 0;
2390 if (!bond_has_slaves(bond
))
2395 oldcurrent
= ACCESS_ONCE(bond
->curr_active_slave
);
2396 /* see if any of the previous devices are up now (i.e. they have
2397 * xmt and rcv traffic). the curr_active_slave does not come into
2398 * the picture unless it is null. also, slave->jiffies is not needed
2399 * here because we send an arp on each slave and give a slave as
2400 * long as it needs to get the tx/rx within the delta.
2401 * TODO: what about up/down delay in arp mode? it wasn't here before
2404 bond_for_each_slave_rcu(bond
, slave
, iter
) {
2405 unsigned long trans_start
= dev_trans_start(slave
->dev
);
2407 if (slave
->link
!= BOND_LINK_UP
) {
2408 if (bond_time_in_interval(bond
, trans_start
, 1) &&
2409 bond_time_in_interval(bond
, slave
->dev
->last_rx
, 1)) {
2411 slave
->link
= BOND_LINK_UP
;
2412 bond_set_active_slave(slave
);
2414 /* primary_slave has no meaning in round-robin
2415 * mode. the window of a slave being up and
2416 * curr_active_slave being null after enslaving
2420 pr_info("%s: link status definitely up for interface %s, ",
2425 pr_info("%s: interface %s is now up\n",
2431 /* slave->link == BOND_LINK_UP */
2433 /* not all switches will respond to an arp request
2434 * when the source ip is 0, so don't take the link down
2435 * if we don't know our ip yet
2437 if (!bond_time_in_interval(bond
, trans_start
, 2) ||
2438 !bond_time_in_interval(bond
, slave
->dev
->last_rx
, 2)) {
2440 slave
->link
= BOND_LINK_DOWN
;
2441 bond_set_backup_slave(slave
);
2443 if (slave
->link_failure_count
< UINT_MAX
)
2444 slave
->link_failure_count
++;
2446 pr_info("%s: interface %s is now down.\n",
2450 if (slave
== oldcurrent
)
2455 /* note: if switch is in round-robin mode, all links
2456 * must tx arp to ensure all links rx an arp - otherwise
2457 * links may oscillate or not come up at all; if switch is
2458 * in something like xor mode, there is nothing we can
2459 * do - all replies will be rx'ed on same link causing slaves
2460 * to be unstable during low/no traffic periods
2462 if (IS_UP(slave
->dev
))
2463 bond_arp_send_all(bond
, slave
);
2469 /* the bond_select_active_slave must hold RTNL
2470 * and curr_slave_lock for write.
2472 if (!rtnl_trylock())
2475 write_lock_bh(&bond
->curr_slave_lock
);
2477 bond_select_active_slave(bond
);
2479 write_unlock_bh(&bond
->curr_slave_lock
);
2480 unblock_netpoll_tx();
2485 if (bond
->params
.arp_interval
)
2486 queue_delayed_work(bond
->wq
, &bond
->arp_work
,
2487 msecs_to_jiffies(bond
->params
.arp_interval
));
2491 * Called to inspect slaves for active-backup mode ARP monitor link state
2492 * changes. Sets new_link in slaves to specify what action should take
2493 * place for the slave. Returns 0 if no changes are found, >0 if changes
2494 * to link states must be committed.
2496 * Called with rcu_read_lock hold.
2498 static int bond_ab_arp_inspect(struct bonding
*bond
)
2500 unsigned long trans_start
, last_rx
;
2501 struct list_head
*iter
;
2502 struct slave
*slave
;
2505 bond_for_each_slave_rcu(bond
, slave
, iter
) {
2506 slave
->new_link
= BOND_LINK_NOCHANGE
;
2507 last_rx
= slave_last_rx(bond
, slave
);
2509 if (slave
->link
!= BOND_LINK_UP
) {
2510 if (bond_time_in_interval(bond
, last_rx
, 1)) {
2511 slave
->new_link
= BOND_LINK_UP
;
2518 * Give slaves 2*delta after being enslaved or made
2519 * active. This avoids bouncing, as the last receive
2520 * times need a full ARP monitor cycle to be updated.
2522 if (bond_time_in_interval(bond
, slave
->jiffies
, 2))
2526 * Backup slave is down if:
2527 * - No current_arp_slave AND
2528 * - more than 3*delta since last receive AND
2529 * - the bond has an IP address
2531 * Note: a non-null current_arp_slave indicates
2532 * the curr_active_slave went down and we are
2533 * searching for a new one; under this condition
2534 * we only take the curr_active_slave down - this
2535 * gives each slave a chance to tx/rx traffic
2536 * before being taken out
2538 if (!bond_is_active_slave(slave
) &&
2539 !bond
->current_arp_slave
&&
2540 !bond_time_in_interval(bond
, last_rx
, 3)) {
2541 slave
->new_link
= BOND_LINK_DOWN
;
2546 * Active slave is down if:
2547 * - more than 2*delta since transmitting OR
2548 * - (more than 2*delta since receive AND
2549 * the bond has an IP address)
2551 trans_start
= dev_trans_start(slave
->dev
);
2552 if (bond_is_active_slave(slave
) &&
2553 (!bond_time_in_interval(bond
, trans_start
, 2) ||
2554 !bond_time_in_interval(bond
, last_rx
, 2))) {
2555 slave
->new_link
= BOND_LINK_DOWN
;
2564 * Called to commit link state changes noted by inspection step of
2565 * active-backup mode ARP monitor.
2567 * Called with RTNL hold.
2569 static void bond_ab_arp_commit(struct bonding
*bond
)
2571 unsigned long trans_start
;
2572 struct list_head
*iter
;
2573 struct slave
*slave
;
2575 bond_for_each_slave(bond
, slave
, iter
) {
2576 switch (slave
->new_link
) {
2577 case BOND_LINK_NOCHANGE
:
2581 trans_start
= dev_trans_start(slave
->dev
);
2582 if (bond
->curr_active_slave
!= slave
||
2583 (!bond
->curr_active_slave
&&
2584 bond_time_in_interval(bond
, trans_start
, 1))) {
2585 slave
->link
= BOND_LINK_UP
;
2586 if (bond
->current_arp_slave
) {
2587 bond_set_slave_inactive_flags(
2588 bond
->current_arp_slave
);
2589 bond
->current_arp_slave
= NULL
;
2592 pr_info("%s: link status definitely up for interface %s.\n",
2593 bond
->dev
->name
, slave
->dev
->name
);
2595 if (!bond
->curr_active_slave
||
2596 (slave
== bond
->primary_slave
))
2603 case BOND_LINK_DOWN
:
2604 if (slave
->link_failure_count
< UINT_MAX
)
2605 slave
->link_failure_count
++;
2607 slave
->link
= BOND_LINK_DOWN
;
2608 bond_set_slave_inactive_flags(slave
);
2610 pr_info("%s: link status definitely down for interface %s, disabling it\n",
2611 bond
->dev
->name
, slave
->dev
->name
);
2613 if (slave
== bond
->curr_active_slave
) {
2614 bond
->current_arp_slave
= NULL
;
2621 pr_err("%s: impossible: new_link %d on slave %s\n",
2622 bond
->dev
->name
, slave
->new_link
,
2630 write_lock_bh(&bond
->curr_slave_lock
);
2631 bond_select_active_slave(bond
);
2632 write_unlock_bh(&bond
->curr_slave_lock
);
2633 unblock_netpoll_tx();
2636 bond_set_carrier(bond
);
2640 * Send ARP probes for active-backup mode ARP monitor.
2642 * Called with rcu_read_lock hold.
2644 static void bond_ab_arp_probe(struct bonding
*bond
)
2646 struct slave
*slave
, *before
= NULL
, *new_slave
= NULL
,
2647 *curr_arp_slave
= rcu_dereference(bond
->current_arp_slave
);
2648 struct list_head
*iter
;
2651 read_lock(&bond
->curr_slave_lock
);
2653 if (curr_arp_slave
&& bond
->curr_active_slave
)
2654 pr_info("PROBE: c_arp %s && cas %s BAD\n",
2655 curr_arp_slave
->dev
->name
,
2656 bond
->curr_active_slave
->dev
->name
);
2658 if (bond
->curr_active_slave
) {
2659 bond_arp_send_all(bond
, bond
->curr_active_slave
);
2660 read_unlock(&bond
->curr_slave_lock
);
2664 read_unlock(&bond
->curr_slave_lock
);
2666 /* if we don't have a curr_active_slave, search for the next available
2667 * backup slave from the current_arp_slave and make it the candidate
2668 * for becoming the curr_active_slave
2671 if (!curr_arp_slave
) {
2672 curr_arp_slave
= bond_first_slave_rcu(bond
);
2673 if (!curr_arp_slave
)
2677 bond_set_slave_inactive_flags(curr_arp_slave
);
2679 bond_for_each_slave_rcu(bond
, slave
, iter
) {
2680 if (!found
&& !before
&& IS_UP(slave
->dev
))
2683 if (found
&& !new_slave
&& IS_UP(slave
->dev
))
2685 /* if the link state is up at this point, we
2686 * mark it down - this can happen if we have
2687 * simultaneous link failures and
2688 * reselect_active_interface doesn't make this
2689 * one the current slave so it is still marked
2690 * up when it is actually down
2692 if (!IS_UP(slave
->dev
) && slave
->link
== BOND_LINK_UP
) {
2693 slave
->link
= BOND_LINK_DOWN
;
2694 if (slave
->link_failure_count
< UINT_MAX
)
2695 slave
->link_failure_count
++;
2697 bond_set_slave_inactive_flags(slave
);
2699 pr_info("%s: backup interface %s is now down.\n",
2700 bond
->dev
->name
, slave
->dev
->name
);
2702 if (slave
== curr_arp_slave
)
2706 if (!new_slave
&& before
)
2712 new_slave
->link
= BOND_LINK_BACK
;
2713 bond_set_slave_active_flags(new_slave
);
2714 bond_arp_send_all(bond
, new_slave
);
2715 new_slave
->jiffies
= jiffies
;
2716 rcu_assign_pointer(bond
->current_arp_slave
, new_slave
);
2719 void bond_activebackup_arp_mon(struct work_struct
*work
)
2721 struct bonding
*bond
= container_of(work
, struct bonding
,
2723 bool should_notify_peers
= false;
2726 delta_in_ticks
= msecs_to_jiffies(bond
->params
.arp_interval
);
2728 if (!bond_has_slaves(bond
))
2733 should_notify_peers
= bond_should_notify_peers(bond
);
2735 if (bond_ab_arp_inspect(bond
)) {
2738 /* Race avoidance with bond_close flush of workqueue */
2739 if (!rtnl_trylock()) {
2741 should_notify_peers
= false;
2745 bond_ab_arp_commit(bond
);
2751 bond_ab_arp_probe(bond
);
2755 if (bond
->params
.arp_interval
)
2756 queue_delayed_work(bond
->wq
, &bond
->arp_work
, delta_in_ticks
);
2758 if (should_notify_peers
) {
2759 if (!rtnl_trylock())
2761 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS
, bond
->dev
);
2766 /*-------------------------- netdev event handling --------------------------*/
2769 * Change device name
2771 static int bond_event_changename(struct bonding
*bond
)
2773 bond_remove_proc_entry(bond
);
2774 bond_create_proc_entry(bond
);
2776 bond_debug_reregister(bond
);
2781 static int bond_master_netdev_event(unsigned long event
,
2782 struct net_device
*bond_dev
)
2784 struct bonding
*event_bond
= netdev_priv(bond_dev
);
2787 case NETDEV_CHANGENAME
:
2788 return bond_event_changename(event_bond
);
2789 case NETDEV_UNREGISTER
:
2790 bond_remove_proc_entry(event_bond
);
2792 case NETDEV_REGISTER
:
2793 bond_create_proc_entry(event_bond
);
2795 case NETDEV_NOTIFY_PEERS
:
2796 if (event_bond
->send_peer_notif
)
2797 event_bond
->send_peer_notif
--;
2806 static int bond_slave_netdev_event(unsigned long event
,
2807 struct net_device
*slave_dev
)
2809 struct slave
*slave
= bond_slave_get_rtnl(slave_dev
);
2810 struct bonding
*bond
;
2811 struct net_device
*bond_dev
;
2815 /* A netdev event can be generated while enslaving a device
2816 * before netdev_rx_handler_register is called in which case
2817 * slave will be NULL
2821 bond_dev
= slave
->bond
->dev
;
2825 case NETDEV_UNREGISTER
:
2826 if (bond_dev
->type
!= ARPHRD_ETHER
)
2827 bond_release_and_destroy(bond_dev
, slave_dev
);
2829 bond_release(bond_dev
, slave_dev
);
2833 old_speed
= slave
->speed
;
2834 old_duplex
= slave
->duplex
;
2836 bond_update_speed_duplex(slave
);
2838 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
2839 if (old_speed
!= slave
->speed
)
2840 bond_3ad_adapter_speed_changed(slave
);
2841 if (old_duplex
!= slave
->duplex
)
2842 bond_3ad_adapter_duplex_changed(slave
);
2847 * ... Or is it this?
2850 case NETDEV_CHANGEMTU
:
2852 * TODO: Should slaves be allowed to
2853 * independently alter their MTU? For
2854 * an active-backup bond, slaves need
2855 * not be the same type of device, so
2856 * MTUs may vary. For other modes,
2857 * slaves arguably should have the
2858 * same MTUs. To do this, we'd need to
2859 * take over the slave's change_mtu
2860 * function for the duration of their
2864 case NETDEV_CHANGENAME
:
2866 * TODO: handle changing the primary's name
2869 case NETDEV_FEAT_CHANGE
:
2870 bond_compute_features(bond
);
2872 case NETDEV_RESEND_IGMP
:
2873 /* Propagate to master device */
2874 call_netdevice_notifiers(event
, slave
->bond
->dev
);
2884 * bond_netdev_event: handle netdev notifier chain events.
2886 * This function receives events for the netdev chain. The caller (an
2887 * ioctl handler calling blocking_notifier_call_chain) holds the necessary
2888 * locks for us to safely manipulate the slave devices (RTNL lock,
2891 static int bond_netdev_event(struct notifier_block
*this,
2892 unsigned long event
, void *ptr
)
2894 struct net_device
*event_dev
= netdev_notifier_info_to_dev(ptr
);
2896 pr_debug("event_dev: %s, event: %lx\n",
2897 event_dev
? event_dev
->name
: "None",
2900 if (!(event_dev
->priv_flags
& IFF_BONDING
))
2903 if (event_dev
->flags
& IFF_MASTER
) {
2904 pr_debug("IFF_MASTER\n");
2905 return bond_master_netdev_event(event
, event_dev
);
2908 if (event_dev
->flags
& IFF_SLAVE
) {
2909 pr_debug("IFF_SLAVE\n");
2910 return bond_slave_netdev_event(event
, event_dev
);
2916 static struct notifier_block bond_netdev_notifier
= {
2917 .notifier_call
= bond_netdev_event
,
2920 /*---------------------------- Hashing Policies -----------------------------*/
2922 /* L2 hash helper */
2923 static inline u32
bond_eth_hash(struct sk_buff
*skb
)
2925 struct ethhdr
*data
= (struct ethhdr
*)skb
->data
;
2927 if (skb_headlen(skb
) >= offsetof(struct ethhdr
, h_proto
))
2928 return data
->h_dest
[5] ^ data
->h_source
[5];
2933 /* Extract the appropriate headers based on bond's xmit policy */
2934 static bool bond_flow_dissect(struct bonding
*bond
, struct sk_buff
*skb
,
2935 struct flow_keys
*fk
)
2937 const struct ipv6hdr
*iph6
;
2938 const struct iphdr
*iph
;
2939 int noff
, proto
= -1;
2941 if (bond
->params
.xmit_policy
> BOND_XMIT_POLICY_LAYER23
)
2942 return skb_flow_dissect(skb
, fk
);
2945 noff
= skb_network_offset(skb
);
2946 if (skb
->protocol
== htons(ETH_P_IP
)) {
2947 if (!pskb_may_pull(skb
, noff
+ sizeof(*iph
)))
2950 fk
->src
= iph
->saddr
;
2951 fk
->dst
= iph
->daddr
;
2952 noff
+= iph
->ihl
<< 2;
2953 if (!ip_is_fragment(iph
))
2954 proto
= iph
->protocol
;
2955 } else if (skb
->protocol
== htons(ETH_P_IPV6
)) {
2956 if (!pskb_may_pull(skb
, noff
+ sizeof(*iph6
)))
2958 iph6
= ipv6_hdr(skb
);
2959 fk
->src
= (__force __be32
)ipv6_addr_hash(&iph6
->saddr
);
2960 fk
->dst
= (__force __be32
)ipv6_addr_hash(&iph6
->daddr
);
2961 noff
+= sizeof(*iph6
);
2962 proto
= iph6
->nexthdr
;
2966 if (bond
->params
.xmit_policy
== BOND_XMIT_POLICY_LAYER34
&& proto
>= 0)
2967 fk
->ports
= skb_flow_get_ports(skb
, noff
, proto
);
2973 * bond_xmit_hash - generate a hash value based on the xmit policy
2974 * @bond: bonding device
2975 * @skb: buffer to use for headers
2976 * @count: modulo value
2978 * This function will extract the necessary headers from the skb buffer and use
2979 * them to generate a hash based on the xmit_policy set in the bonding device
2980 * which will be reduced modulo count before returning.
2982 int bond_xmit_hash(struct bonding
*bond
, struct sk_buff
*skb
, int count
)
2984 struct flow_keys flow
;
2987 if (bond
->params
.xmit_policy
== BOND_XMIT_POLICY_LAYER2
||
2988 !bond_flow_dissect(bond
, skb
, &flow
))
2989 return bond_eth_hash(skb
) % count
;
2991 if (bond
->params
.xmit_policy
== BOND_XMIT_POLICY_LAYER23
||
2992 bond
->params
.xmit_policy
== BOND_XMIT_POLICY_ENCAP23
)
2993 hash
= bond_eth_hash(skb
);
2995 hash
= (__force u32
)flow
.ports
;
2996 hash
^= (__force u32
)flow
.dst
^ (__force u32
)flow
.src
;
2997 hash
^= (hash
>> 16);
2998 hash
^= (hash
>> 8);
3000 return hash
% count
;
3003 /*-------------------------- Device entry points ----------------------------*/
3005 static void bond_work_init_all(struct bonding
*bond
)
3007 INIT_DELAYED_WORK(&bond
->mcast_work
,
3008 bond_resend_igmp_join_requests_delayed
);
3009 INIT_DELAYED_WORK(&bond
->alb_work
, bond_alb_monitor
);
3010 INIT_DELAYED_WORK(&bond
->mii_work
, bond_mii_monitor
);
3011 if (bond
->params
.mode
== BOND_MODE_ACTIVEBACKUP
)
3012 INIT_DELAYED_WORK(&bond
->arp_work
, bond_activebackup_arp_mon
);
3014 INIT_DELAYED_WORK(&bond
->arp_work
, bond_loadbalance_arp_mon
);
3015 INIT_DELAYED_WORK(&bond
->ad_work
, bond_3ad_state_machine_handler
);
3018 static void bond_work_cancel_all(struct bonding
*bond
)
3020 cancel_delayed_work_sync(&bond
->mii_work
);
3021 cancel_delayed_work_sync(&bond
->arp_work
);
3022 cancel_delayed_work_sync(&bond
->alb_work
);
3023 cancel_delayed_work_sync(&bond
->ad_work
);
3024 cancel_delayed_work_sync(&bond
->mcast_work
);
3027 static int bond_open(struct net_device
*bond_dev
)
3029 struct bonding
*bond
= netdev_priv(bond_dev
);
3030 struct list_head
*iter
;
3031 struct slave
*slave
;
3033 /* reset slave->backup and slave->inactive */
3034 read_lock(&bond
->lock
);
3035 if (bond_has_slaves(bond
)) {
3036 read_lock(&bond
->curr_slave_lock
);
3037 bond_for_each_slave(bond
, slave
, iter
) {
3038 if ((bond
->params
.mode
== BOND_MODE_ACTIVEBACKUP
)
3039 && (slave
!= bond
->curr_active_slave
)) {
3040 bond_set_slave_inactive_flags(slave
);
3042 bond_set_slave_active_flags(slave
);
3045 read_unlock(&bond
->curr_slave_lock
);
3047 read_unlock(&bond
->lock
);
3049 bond_work_init_all(bond
);
3051 if (bond_is_lb(bond
)) {
3052 /* bond_alb_initialize must be called before the timer
3055 if (bond_alb_initialize(bond
, (bond
->params
.mode
== BOND_MODE_ALB
)))
3057 queue_delayed_work(bond
->wq
, &bond
->alb_work
, 0);
3060 if (bond
->params
.miimon
) /* link check interval, in milliseconds. */
3061 queue_delayed_work(bond
->wq
, &bond
->mii_work
, 0);
3063 if (bond
->params
.arp_interval
) { /* arp interval, in milliseconds. */
3064 queue_delayed_work(bond
->wq
, &bond
->arp_work
, 0);
3065 if (bond
->params
.arp_validate
)
3066 bond
->recv_probe
= bond_arp_rcv
;
3069 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
3070 queue_delayed_work(bond
->wq
, &bond
->ad_work
, 0);
3071 /* register to receive LACPDUs */
3072 bond
->recv_probe
= bond_3ad_lacpdu_recv
;
3073 bond_3ad_initiate_agg_selection(bond
, 1);
3079 static int bond_close(struct net_device
*bond_dev
)
3081 struct bonding
*bond
= netdev_priv(bond_dev
);
3083 bond_work_cancel_all(bond
);
3084 bond
->send_peer_notif
= 0;
3085 if (bond_is_lb(bond
))
3086 bond_alb_deinitialize(bond
);
3087 bond
->recv_probe
= NULL
;
3092 static struct rtnl_link_stats64
*bond_get_stats(struct net_device
*bond_dev
,
3093 struct rtnl_link_stats64
*stats
)
3095 struct bonding
*bond
= netdev_priv(bond_dev
);
3096 struct rtnl_link_stats64 temp
;
3097 struct list_head
*iter
;
3098 struct slave
*slave
;
3100 memset(stats
, 0, sizeof(*stats
));
3102 read_lock_bh(&bond
->lock
);
3103 bond_for_each_slave(bond
, slave
, iter
) {
3104 const struct rtnl_link_stats64
*sstats
=
3105 dev_get_stats(slave
->dev
, &temp
);
3107 stats
->rx_packets
+= sstats
->rx_packets
;
3108 stats
->rx_bytes
+= sstats
->rx_bytes
;
3109 stats
->rx_errors
+= sstats
->rx_errors
;
3110 stats
->rx_dropped
+= sstats
->rx_dropped
;
3112 stats
->tx_packets
+= sstats
->tx_packets
;
3113 stats
->tx_bytes
+= sstats
->tx_bytes
;
3114 stats
->tx_errors
+= sstats
->tx_errors
;
3115 stats
->tx_dropped
+= sstats
->tx_dropped
;
3117 stats
->multicast
+= sstats
->multicast
;
3118 stats
->collisions
+= sstats
->collisions
;
3120 stats
->rx_length_errors
+= sstats
->rx_length_errors
;
3121 stats
->rx_over_errors
+= sstats
->rx_over_errors
;
3122 stats
->rx_crc_errors
+= sstats
->rx_crc_errors
;
3123 stats
->rx_frame_errors
+= sstats
->rx_frame_errors
;
3124 stats
->rx_fifo_errors
+= sstats
->rx_fifo_errors
;
3125 stats
->rx_missed_errors
+= sstats
->rx_missed_errors
;
3127 stats
->tx_aborted_errors
+= sstats
->tx_aborted_errors
;
3128 stats
->tx_carrier_errors
+= sstats
->tx_carrier_errors
;
3129 stats
->tx_fifo_errors
+= sstats
->tx_fifo_errors
;
3130 stats
->tx_heartbeat_errors
+= sstats
->tx_heartbeat_errors
;
3131 stats
->tx_window_errors
+= sstats
->tx_window_errors
;
3133 read_unlock_bh(&bond
->lock
);
3138 static int bond_do_ioctl(struct net_device
*bond_dev
, struct ifreq
*ifr
, int cmd
)
3140 struct bonding
*bond
= netdev_priv(bond_dev
);
3141 struct net_device
*slave_dev
= NULL
;
3142 struct ifbond k_binfo
;
3143 struct ifbond __user
*u_binfo
= NULL
;
3144 struct ifslave k_sinfo
;
3145 struct ifslave __user
*u_sinfo
= NULL
;
3146 struct mii_ioctl_data
*mii
= NULL
;
3150 pr_debug("bond_ioctl: master=%s, cmd=%d\n", bond_dev
->name
, cmd
);
3162 * We do this again just in case we were called by SIOCGMIIREG
3163 * instead of SIOCGMIIPHY.
3170 if (mii
->reg_num
== 1) {
3172 read_lock(&bond
->lock
);
3173 read_lock(&bond
->curr_slave_lock
);
3174 if (netif_carrier_ok(bond
->dev
))
3175 mii
->val_out
= BMSR_LSTATUS
;
3177 read_unlock(&bond
->curr_slave_lock
);
3178 read_unlock(&bond
->lock
);
3182 case BOND_INFO_QUERY_OLD
:
3183 case SIOCBONDINFOQUERY
:
3184 u_binfo
= (struct ifbond __user
*)ifr
->ifr_data
;
3186 if (copy_from_user(&k_binfo
, u_binfo
, sizeof(ifbond
)))
3189 res
= bond_info_query(bond_dev
, &k_binfo
);
3191 copy_to_user(u_binfo
, &k_binfo
, sizeof(ifbond
)))
3195 case BOND_SLAVE_INFO_QUERY_OLD
:
3196 case SIOCBONDSLAVEINFOQUERY
:
3197 u_sinfo
= (struct ifslave __user
*)ifr
->ifr_data
;
3199 if (copy_from_user(&k_sinfo
, u_sinfo
, sizeof(ifslave
)))
3202 res
= bond_slave_info_query(bond_dev
, &k_sinfo
);
3204 copy_to_user(u_sinfo
, &k_sinfo
, sizeof(ifslave
)))
3213 net
= dev_net(bond_dev
);
3215 if (!ns_capable(net
->user_ns
, CAP_NET_ADMIN
))
3218 slave_dev
= dev_get_by_name(net
, ifr
->ifr_slave
);
3220 pr_debug("slave_dev=%p:\n", slave_dev
);
3225 pr_debug("slave_dev->name=%s:\n", slave_dev
->name
);
3227 case BOND_ENSLAVE_OLD
:
3228 case SIOCBONDENSLAVE
:
3229 res
= bond_enslave(bond_dev
, slave_dev
);
3231 case BOND_RELEASE_OLD
:
3232 case SIOCBONDRELEASE
:
3233 res
= bond_release(bond_dev
, slave_dev
);
3235 case BOND_SETHWADDR_OLD
:
3236 case SIOCBONDSETHWADDR
:
3237 bond_set_dev_addr(bond_dev
, slave_dev
);
3240 case BOND_CHANGE_ACTIVE_OLD
:
3241 case SIOCBONDCHANGEACTIVE
:
3242 res
= bond_option_active_slave_set(bond
, slave_dev
);
3254 static void bond_change_rx_flags(struct net_device
*bond_dev
, int change
)
3256 struct bonding
*bond
= netdev_priv(bond_dev
);
3258 if (change
& IFF_PROMISC
)
3259 bond_set_promiscuity(bond
,
3260 bond_dev
->flags
& IFF_PROMISC
? 1 : -1);
3262 if (change
& IFF_ALLMULTI
)
3263 bond_set_allmulti(bond
,
3264 bond_dev
->flags
& IFF_ALLMULTI
? 1 : -1);
3267 static void bond_set_rx_mode(struct net_device
*bond_dev
)
3269 struct bonding
*bond
= netdev_priv(bond_dev
);
3270 struct list_head
*iter
;
3271 struct slave
*slave
;
3275 if (USES_PRIMARY(bond
->params
.mode
)) {
3276 slave
= rcu_dereference(bond
->curr_active_slave
);
3278 dev_uc_sync(slave
->dev
, bond_dev
);
3279 dev_mc_sync(slave
->dev
, bond_dev
);
3282 bond_for_each_slave_rcu(bond
, slave
, iter
) {
3283 dev_uc_sync_multiple(slave
->dev
, bond_dev
);
3284 dev_mc_sync_multiple(slave
->dev
, bond_dev
);
3290 static int bond_neigh_init(struct neighbour
*n
)
3292 struct bonding
*bond
= netdev_priv(n
->dev
);
3293 const struct net_device_ops
*slave_ops
;
3294 struct neigh_parms parms
;
3295 struct slave
*slave
;
3298 slave
= bond_first_slave(bond
);
3301 slave_ops
= slave
->dev
->netdev_ops
;
3302 if (!slave_ops
->ndo_neigh_setup
)
3305 parms
.neigh_setup
= NULL
;
3306 parms
.neigh_cleanup
= NULL
;
3307 ret
= slave_ops
->ndo_neigh_setup(slave
->dev
, &parms
);
3312 * Assign slave's neigh_cleanup to neighbour in case cleanup is called
3313 * after the last slave has been detached. Assumes that all slaves
3314 * utilize the same neigh_cleanup (true at this writing as only user
3317 n
->parms
->neigh_cleanup
= parms
.neigh_cleanup
;
3319 if (!parms
.neigh_setup
)
3322 return parms
.neigh_setup(n
);
3326 * The bonding ndo_neigh_setup is called at init time beofre any
3327 * slave exists. So we must declare proxy setup function which will
3328 * be used at run time to resolve the actual slave neigh param setup.
3330 * It's also called by master devices (such as vlans) to setup their
3331 * underlying devices. In that case - do nothing, we're already set up from
3334 static int bond_neigh_setup(struct net_device
*dev
,
3335 struct neigh_parms
*parms
)
3337 /* modify only our neigh_parms */
3338 if (parms
->dev
== dev
)
3339 parms
->neigh_setup
= bond_neigh_init
;
3345 * Change the MTU of all of a master's slaves to match the master
3347 static int bond_change_mtu(struct net_device
*bond_dev
, int new_mtu
)
3349 struct bonding
*bond
= netdev_priv(bond_dev
);
3350 struct slave
*slave
, *rollback_slave
;
3351 struct list_head
*iter
;
3354 pr_debug("bond=%p, name=%s, new_mtu=%d\n", bond
,
3355 (bond_dev
? bond_dev
->name
: "None"), new_mtu
);
3357 /* Can't hold bond->lock with bh disabled here since
3358 * some base drivers panic. On the other hand we can't
3359 * hold bond->lock without bh disabled because we'll
3360 * deadlock. The only solution is to rely on the fact
3361 * that we're under rtnl_lock here, and the slaves
3362 * list won't change. This doesn't solve the problem
3363 * of setting the slave's MTU while it is
3364 * transmitting, but the assumption is that the base
3365 * driver can handle that.
3367 * TODO: figure out a way to safely iterate the slaves
3368 * list, but without holding a lock around the actual
3369 * call to the base driver.
3372 bond_for_each_slave(bond
, slave
, iter
) {
3373 pr_debug("s %p c_m %p\n",
3375 slave
->dev
->netdev_ops
->ndo_change_mtu
);
3377 res
= dev_set_mtu(slave
->dev
, new_mtu
);
3380 /* If we failed to set the slave's mtu to the new value
3381 * we must abort the operation even in ACTIVE_BACKUP
3382 * mode, because if we allow the backup slaves to have
3383 * different mtu values than the active slave we'll
3384 * need to change their mtu when doing a failover. That
3385 * means changing their mtu from timer context, which
3386 * is probably not a good idea.
3388 pr_debug("err %d %s\n", res
, slave
->dev
->name
);
3393 bond_dev
->mtu
= new_mtu
;
3398 /* unwind from head to the slave that failed */
3399 bond_for_each_slave(bond
, rollback_slave
, iter
) {
3402 if (rollback_slave
== slave
)
3405 tmp_res
= dev_set_mtu(rollback_slave
->dev
, bond_dev
->mtu
);
3407 pr_debug("unwind err %d dev %s\n",
3408 tmp_res
, rollback_slave
->dev
->name
);
3418 * Note that many devices must be down to change the HW address, and
3419 * downing the master releases all slaves. We can make bonds full of
3420 * bonding devices to test this, however.
3422 static int bond_set_mac_address(struct net_device
*bond_dev
, void *addr
)
3424 struct bonding
*bond
= netdev_priv(bond_dev
);
3425 struct slave
*slave
, *rollback_slave
;
3426 struct sockaddr
*sa
= addr
, tmp_sa
;
3427 struct list_head
*iter
;
3430 if (bond
->params
.mode
== BOND_MODE_ALB
)
3431 return bond_alb_set_mac_address(bond_dev
, addr
);
3434 pr_debug("bond=%p, name=%s\n",
3435 bond
, bond_dev
? bond_dev
->name
: "None");
3437 /* If fail_over_mac is enabled, do nothing and return success.
3438 * Returning an error causes ifenslave to fail.
3440 if (bond
->params
.fail_over_mac
)
3443 if (!is_valid_ether_addr(sa
->sa_data
))
3444 return -EADDRNOTAVAIL
;
3446 /* Can't hold bond->lock with bh disabled here since
3447 * some base drivers panic. On the other hand we can't
3448 * hold bond->lock without bh disabled because we'll
3449 * deadlock. The only solution is to rely on the fact
3450 * that we're under rtnl_lock here, and the slaves
3451 * list won't change. This doesn't solve the problem
3452 * of setting the slave's hw address while it is
3453 * transmitting, but the assumption is that the base
3454 * driver can handle that.
3456 * TODO: figure out a way to safely iterate the slaves
3457 * list, but without holding a lock around the actual
3458 * call to the base driver.
3461 bond_for_each_slave(bond
, slave
, iter
) {
3462 const struct net_device_ops
*slave_ops
= slave
->dev
->netdev_ops
;
3463 pr_debug("slave %p %s\n", slave
, slave
->dev
->name
);
3465 if (slave_ops
->ndo_set_mac_address
== NULL
) {
3467 pr_debug("EOPNOTSUPP %s\n", slave
->dev
->name
);
3471 res
= dev_set_mac_address(slave
->dev
, addr
);
3473 /* TODO: consider downing the slave
3475 * User should expect communications
3476 * breakage anyway until ARP finish
3479 pr_debug("err %d %s\n", res
, slave
->dev
->name
);
3485 memcpy(bond_dev
->dev_addr
, sa
->sa_data
, bond_dev
->addr_len
);
3489 memcpy(tmp_sa
.sa_data
, bond_dev
->dev_addr
, bond_dev
->addr_len
);
3490 tmp_sa
.sa_family
= bond_dev
->type
;
3492 /* unwind from head to the slave that failed */
3493 bond_for_each_slave(bond
, rollback_slave
, iter
) {
3496 if (rollback_slave
== slave
)
3499 tmp_res
= dev_set_mac_address(rollback_slave
->dev
, &tmp_sa
);
3501 pr_debug("unwind err %d dev %s\n",
3502 tmp_res
, rollback_slave
->dev
->name
);
3510 * bond_xmit_slave_id - transmit skb through slave with slave_id
3511 * @bond: bonding device that is transmitting
3512 * @skb: buffer to transmit
3513 * @slave_id: slave id up to slave_cnt-1 through which to transmit
3515 * This function tries to transmit through slave with slave_id but in case
3516 * it fails, it tries to find the first available slave for transmission.
3517 * The skb is consumed in all cases, thus the function is void.
3519 static void bond_xmit_slave_id(struct bonding
*bond
, struct sk_buff
*skb
, int slave_id
)
3521 struct list_head
*iter
;
3522 struct slave
*slave
;
3525 /* Here we start from the slave with slave_id */
3526 bond_for_each_slave_rcu(bond
, slave
, iter
) {
3528 if (slave_can_tx(slave
)) {
3529 bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
3535 /* Here we start from the first slave up to slave_id */
3537 bond_for_each_slave_rcu(bond
, slave
, iter
) {
3540 if (slave_can_tx(slave
)) {
3541 bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
3545 /* no slave that can tx has been found */
3550 * bond_rr_gen_slave_id - generate slave id based on packets_per_slave
3551 * @bond: bonding device to use
3553 * Based on the value of the bonding device's packets_per_slave parameter
3554 * this function generates a slave id, which is usually used as the next
3555 * slave to transmit through.
3557 static u32
bond_rr_gen_slave_id(struct bonding
*bond
)
3559 int packets_per_slave
= bond
->params
.packets_per_slave
;
3562 switch (packets_per_slave
) {
3564 slave_id
= prandom_u32();
3567 slave_id
= bond
->rr_tx_counter
;
3570 slave_id
= reciprocal_divide(bond
->rr_tx_counter
,
3574 bond
->rr_tx_counter
++;
3579 static int bond_xmit_roundrobin(struct sk_buff
*skb
, struct net_device
*bond_dev
)
3581 struct bonding
*bond
= netdev_priv(bond_dev
);
3582 struct iphdr
*iph
= ip_hdr(skb
);
3583 struct slave
*slave
;
3586 /* Start with the curr_active_slave that joined the bond as the
3587 * default for sending IGMP traffic. For failover purposes one
3588 * needs to maintain some consistency for the interface that will
3589 * send the join/membership reports. The curr_active_slave found
3590 * will send all of this type of traffic.
3592 if (iph
->protocol
== IPPROTO_IGMP
&& skb
->protocol
== htons(ETH_P_IP
)) {
3593 slave
= rcu_dereference(bond
->curr_active_slave
);
3594 if (slave
&& slave_can_tx(slave
))
3595 bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
3597 bond_xmit_slave_id(bond
, skb
, 0);
3599 slave_id
= bond_rr_gen_slave_id(bond
);
3600 bond_xmit_slave_id(bond
, skb
, slave_id
% bond
->slave_cnt
);
3603 return NETDEV_TX_OK
;
3607 * in active-backup mode, we know that bond->curr_active_slave is always valid if
3608 * the bond has a usable interface.
3610 static int bond_xmit_activebackup(struct sk_buff
*skb
, struct net_device
*bond_dev
)
3612 struct bonding
*bond
= netdev_priv(bond_dev
);
3613 struct slave
*slave
;
3615 slave
= rcu_dereference(bond
->curr_active_slave
);
3617 bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
3621 return NETDEV_TX_OK
;
3624 /* In bond_xmit_xor() , we determine the output device by using a pre-
3625 * determined xmit_hash_policy(), If the selected device is not enabled,
3626 * find the next active slave.
3628 static int bond_xmit_xor(struct sk_buff
*skb
, struct net_device
*bond_dev
)
3630 struct bonding
*bond
= netdev_priv(bond_dev
);
3632 bond_xmit_slave_id(bond
, skb
, bond_xmit_hash(bond
, skb
, bond
->slave_cnt
));
3634 return NETDEV_TX_OK
;
3637 /* in broadcast mode, we send everything to all usable interfaces. */
3638 static int bond_xmit_broadcast(struct sk_buff
*skb
, struct net_device
*bond_dev
)
3640 struct bonding
*bond
= netdev_priv(bond_dev
);
3641 struct slave
*slave
= NULL
;
3642 struct list_head
*iter
;
3644 bond_for_each_slave_rcu(bond
, slave
, iter
) {
3645 if (bond_is_last_slave(bond
, slave
))
3647 if (IS_UP(slave
->dev
) && slave
->link
== BOND_LINK_UP
) {
3648 struct sk_buff
*skb2
= skb_clone(skb
, GFP_ATOMIC
);
3651 pr_err("%s: Error: bond_xmit_broadcast(): skb_clone() failed\n",
3655 /* bond_dev_queue_xmit always returns 0 */
3656 bond_dev_queue_xmit(bond
, skb2
, slave
->dev
);
3659 if (slave
&& IS_UP(slave
->dev
) && slave
->link
== BOND_LINK_UP
)
3660 bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
3664 return NETDEV_TX_OK
;
3667 /*------------------------- Device initialization ---------------------------*/
3670 * Lookup the slave that corresponds to a qid
3672 static inline int bond_slave_override(struct bonding
*bond
,
3673 struct sk_buff
*skb
)
3675 struct slave
*slave
= NULL
;
3676 struct slave
*check_slave
;
3677 struct list_head
*iter
;
3680 if (!skb
->queue_mapping
)
3683 /* Find out if any slaves have the same mapping as this skb. */
3684 bond_for_each_slave_rcu(bond
, check_slave
, iter
) {
3685 if (check_slave
->queue_id
== skb
->queue_mapping
) {
3686 slave
= check_slave
;
3691 /* If the slave isn't UP, use default transmit policy. */
3692 if (slave
&& slave
->queue_id
&& IS_UP(slave
->dev
) &&
3693 (slave
->link
== BOND_LINK_UP
)) {
3694 res
= bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
3701 static u16
bond_select_queue(struct net_device
*dev
, struct sk_buff
*skb
)
3704 * This helper function exists to help dev_pick_tx get the correct
3705 * destination queue. Using a helper function skips a call to
3706 * skb_tx_hash and will put the skbs in the queue we expect on their
3707 * way down to the bonding driver.
3709 u16 txq
= skb_rx_queue_recorded(skb
) ? skb_get_rx_queue(skb
) : 0;
3712 * Save the original txq to restore before passing to the driver
3714 qdisc_skb_cb(skb
)->slave_dev_queue_mapping
= skb
->queue_mapping
;
3716 if (unlikely(txq
>= dev
->real_num_tx_queues
)) {
3718 txq
-= dev
->real_num_tx_queues
;
3719 } while (txq
>= dev
->real_num_tx_queues
);
3724 static netdev_tx_t
__bond_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
3726 struct bonding
*bond
= netdev_priv(dev
);
3728 if (TX_QUEUE_OVERRIDE(bond
->params
.mode
)) {
3729 if (!bond_slave_override(bond
, skb
))
3730 return NETDEV_TX_OK
;
3733 switch (bond
->params
.mode
) {
3734 case BOND_MODE_ROUNDROBIN
:
3735 return bond_xmit_roundrobin(skb
, dev
);
3736 case BOND_MODE_ACTIVEBACKUP
:
3737 return bond_xmit_activebackup(skb
, dev
);
3739 return bond_xmit_xor(skb
, dev
);
3740 case BOND_MODE_BROADCAST
:
3741 return bond_xmit_broadcast(skb
, dev
);
3742 case BOND_MODE_8023AD
:
3743 return bond_3ad_xmit_xor(skb
, dev
);
3746 return bond_alb_xmit(skb
, dev
);
3748 /* Should never happen, mode already checked */
3749 pr_err("%s: Error: Unknown bonding mode %d\n",
3750 dev
->name
, bond
->params
.mode
);
3753 return NETDEV_TX_OK
;
3757 static netdev_tx_t
bond_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
3759 struct bonding
*bond
= netdev_priv(dev
);
3760 netdev_tx_t ret
= NETDEV_TX_OK
;
3763 * If we risk deadlock from transmitting this in the
3764 * netpoll path, tell netpoll to queue the frame for later tx
3766 if (is_netpoll_tx_blocked(dev
))
3767 return NETDEV_TX_BUSY
;
3770 if (bond_has_slaves(bond
))
3771 ret
= __bond_start_xmit(skb
, dev
);
3779 static int bond_ethtool_get_settings(struct net_device
*bond_dev
,
3780 struct ethtool_cmd
*ecmd
)
3782 struct bonding
*bond
= netdev_priv(bond_dev
);
3783 unsigned long speed
= 0;
3784 struct list_head
*iter
;
3785 struct slave
*slave
;
3787 ecmd
->duplex
= DUPLEX_UNKNOWN
;
3788 ecmd
->port
= PORT_OTHER
;
3790 /* Since SLAVE_IS_OK returns false for all inactive or down slaves, we
3791 * do not need to check mode. Though link speed might not represent
3792 * the true receive or transmit bandwidth (not all modes are symmetric)
3793 * this is an accurate maximum.
3795 read_lock(&bond
->lock
);
3796 bond_for_each_slave(bond
, slave
, iter
) {
3797 if (SLAVE_IS_OK(slave
)) {
3798 if (slave
->speed
!= SPEED_UNKNOWN
)
3799 speed
+= slave
->speed
;
3800 if (ecmd
->duplex
== DUPLEX_UNKNOWN
&&
3801 slave
->duplex
!= DUPLEX_UNKNOWN
)
3802 ecmd
->duplex
= slave
->duplex
;
3805 ethtool_cmd_speed_set(ecmd
, speed
? : SPEED_UNKNOWN
);
3806 read_unlock(&bond
->lock
);
3811 static void bond_ethtool_get_drvinfo(struct net_device
*bond_dev
,
3812 struct ethtool_drvinfo
*drvinfo
)
3814 strlcpy(drvinfo
->driver
, DRV_NAME
, sizeof(drvinfo
->driver
));
3815 strlcpy(drvinfo
->version
, DRV_VERSION
, sizeof(drvinfo
->version
));
3816 snprintf(drvinfo
->fw_version
, sizeof(drvinfo
->fw_version
), "%d",
3820 static const struct ethtool_ops bond_ethtool_ops
= {
3821 .get_drvinfo
= bond_ethtool_get_drvinfo
,
3822 .get_settings
= bond_ethtool_get_settings
,
3823 .get_link
= ethtool_op_get_link
,
3826 static const struct net_device_ops bond_netdev_ops
= {
3827 .ndo_init
= bond_init
,
3828 .ndo_uninit
= bond_uninit
,
3829 .ndo_open
= bond_open
,
3830 .ndo_stop
= bond_close
,
3831 .ndo_start_xmit
= bond_start_xmit
,
3832 .ndo_select_queue
= bond_select_queue
,
3833 .ndo_get_stats64
= bond_get_stats
,
3834 .ndo_do_ioctl
= bond_do_ioctl
,
3835 .ndo_change_rx_flags
= bond_change_rx_flags
,
3836 .ndo_set_rx_mode
= bond_set_rx_mode
,
3837 .ndo_change_mtu
= bond_change_mtu
,
3838 .ndo_set_mac_address
= bond_set_mac_address
,
3839 .ndo_neigh_setup
= bond_neigh_setup
,
3840 .ndo_vlan_rx_add_vid
= bond_vlan_rx_add_vid
,
3841 .ndo_vlan_rx_kill_vid
= bond_vlan_rx_kill_vid
,
3842 #ifdef CONFIG_NET_POLL_CONTROLLER
3843 .ndo_netpoll_setup
= bond_netpoll_setup
,
3844 .ndo_netpoll_cleanup
= bond_netpoll_cleanup
,
3845 .ndo_poll_controller
= bond_poll_controller
,
3847 .ndo_add_slave
= bond_enslave
,
3848 .ndo_del_slave
= bond_release
,
3849 .ndo_fix_features
= bond_fix_features
,
3852 static const struct device_type bond_type
= {
3856 static void bond_destructor(struct net_device
*bond_dev
)
3858 struct bonding
*bond
= netdev_priv(bond_dev
);
3860 destroy_workqueue(bond
->wq
);
3861 free_netdev(bond_dev
);
3864 void bond_setup(struct net_device
*bond_dev
)
3866 struct bonding
*bond
= netdev_priv(bond_dev
);
3868 /* initialize rwlocks */
3869 rwlock_init(&bond
->lock
);
3870 rwlock_init(&bond
->curr_slave_lock
);
3871 bond
->params
= bonding_defaults
;
3873 /* Initialize pointers */
3874 bond
->dev
= bond_dev
;
3876 /* Initialize the device entry points */
3877 ether_setup(bond_dev
);
3878 bond_dev
->netdev_ops
= &bond_netdev_ops
;
3879 bond_dev
->ethtool_ops
= &bond_ethtool_ops
;
3881 bond_dev
->destructor
= bond_destructor
;
3883 SET_NETDEV_DEVTYPE(bond_dev
, &bond_type
);
3885 /* Initialize the device options */
3886 bond_dev
->tx_queue_len
= 0;
3887 bond_dev
->flags
|= IFF_MASTER
|IFF_MULTICAST
;
3888 bond_dev
->priv_flags
|= IFF_BONDING
;
3889 bond_dev
->priv_flags
&= ~(IFF_XMIT_DST_RELEASE
| IFF_TX_SKB_SHARING
);
3891 /* At first, we block adding VLANs. That's the only way to
3892 * prevent problems that occur when adding VLANs over an
3893 * empty bond. The block will be removed once non-challenged
3894 * slaves are enslaved.
3896 bond_dev
->features
|= NETIF_F_VLAN_CHALLENGED
;
3898 /* don't acquire bond device's netif_tx_lock when
3900 bond_dev
->features
|= NETIF_F_LLTX
;
3902 /* By default, we declare the bond to be fully
3903 * VLAN hardware accelerated capable. Special
3904 * care is taken in the various xmit functions
3905 * when there are slaves that are not hw accel
3909 bond_dev
->hw_features
= BOND_VLAN_FEATURES
|
3910 NETIF_F_HW_VLAN_CTAG_TX
|
3911 NETIF_F_HW_VLAN_CTAG_RX
|
3912 NETIF_F_HW_VLAN_CTAG_FILTER
;
3914 bond_dev
->hw_features
&= ~(NETIF_F_ALL_CSUM
& ~NETIF_F_HW_CSUM
);
3915 bond_dev
->features
|= bond_dev
->hw_features
;
3919 * Destroy a bonding device.
3920 * Must be under rtnl_lock when this function is called.
3922 static void bond_uninit(struct net_device
*bond_dev
)
3924 struct bonding
*bond
= netdev_priv(bond_dev
);
3925 struct list_head
*iter
;
3926 struct slave
*slave
;
3928 bond_netpoll_cleanup(bond_dev
);
3930 /* Release the bonded slaves */
3931 bond_for_each_slave(bond
, slave
, iter
)
3932 __bond_release_one(bond_dev
, slave
->dev
, true);
3933 pr_info("%s: released all slaves\n", bond_dev
->name
);
3935 list_del(&bond
->bond_list
);
3937 bond_debug_unregister(bond
);
3940 /*------------------------- Module initialization ---------------------------*/
3943 * Convert string input module parms. Accept either the
3944 * number of the mode or its string name. A bit complicated because
3945 * some mode names are substrings of other names, and calls from sysfs
3946 * may have whitespace in the name (trailing newlines, for example).
3948 int bond_parse_parm(const char *buf
, const struct bond_parm_tbl
*tbl
)
3950 int modeint
= -1, i
, rv
;
3951 char *p
, modestr
[BOND_MAX_MODENAME_LEN
+ 1] = { 0, };
3953 for (p
= (char *)buf
; *p
; p
++)
3954 if (!(isdigit(*p
) || isspace(*p
)))
3958 rv
= sscanf(buf
, "%20s", modestr
);
3960 rv
= sscanf(buf
, "%d", &modeint
);
3965 for (i
= 0; tbl
[i
].modename
; i
++) {
3966 if (modeint
== tbl
[i
].mode
)
3968 if (strcmp(modestr
, tbl
[i
].modename
) == 0)
3975 static int bond_check_params(struct bond_params
*params
)
3977 int arp_validate_value
, fail_over_mac_value
, primary_reselect_value
, i
;
3978 int arp_all_targets_value
;
3981 * Convert string parameters.
3984 bond_mode
= bond_parse_parm(mode
, bond_mode_tbl
);
3985 if (bond_mode
== -1) {
3986 pr_err("Error: Invalid bonding mode \"%s\"\n",
3987 mode
== NULL
? "NULL" : mode
);
3992 if (xmit_hash_policy
) {
3993 if ((bond_mode
!= BOND_MODE_XOR
) &&
3994 (bond_mode
!= BOND_MODE_8023AD
)) {
3995 pr_info("xmit_hash_policy param is irrelevant in mode %s\n",
3996 bond_mode_name(bond_mode
));
3998 xmit_hashtype
= bond_parse_parm(xmit_hash_policy
,
4000 if (xmit_hashtype
== -1) {
4001 pr_err("Error: Invalid xmit_hash_policy \"%s\"\n",
4002 xmit_hash_policy
== NULL
? "NULL" :
4010 if (bond_mode
!= BOND_MODE_8023AD
) {
4011 pr_info("lacp_rate param is irrelevant in mode %s\n",
4012 bond_mode_name(bond_mode
));
4014 lacp_fast
= bond_parse_parm(lacp_rate
, bond_lacp_tbl
);
4015 if (lacp_fast
== -1) {
4016 pr_err("Error: Invalid lacp rate \"%s\"\n",
4017 lacp_rate
== NULL
? "NULL" : lacp_rate
);
4024 params
->ad_select
= bond_parse_parm(ad_select
, ad_select_tbl
);
4025 if (params
->ad_select
== -1) {
4026 pr_err("Error: Invalid ad_select \"%s\"\n",
4027 ad_select
== NULL
? "NULL" : ad_select
);
4031 if (bond_mode
!= BOND_MODE_8023AD
) {
4032 pr_warning("ad_select param only affects 802.3ad mode\n");
4035 params
->ad_select
= BOND_AD_STABLE
;
4038 if (max_bonds
< 0) {
4039 pr_warning("Warning: max_bonds (%d) not in range %d-%d, so it was reset to BOND_DEFAULT_MAX_BONDS (%d)\n",
4040 max_bonds
, 0, INT_MAX
, BOND_DEFAULT_MAX_BONDS
);
4041 max_bonds
= BOND_DEFAULT_MAX_BONDS
;
4045 pr_warning("Warning: miimon module parameter (%d), not in range 0-%d, so it was reset to %d\n",
4046 miimon
, INT_MAX
, BOND_LINK_MON_INTERV
);
4047 miimon
= BOND_LINK_MON_INTERV
;
4051 pr_warning("Warning: updelay module parameter (%d), not in range 0-%d, so it was reset to 0\n",
4056 if (downdelay
< 0) {
4057 pr_warning("Warning: downdelay module parameter (%d), not in range 0-%d, so it was reset to 0\n",
4058 downdelay
, INT_MAX
);
4062 if ((use_carrier
!= 0) && (use_carrier
!= 1)) {
4063 pr_warning("Warning: use_carrier module parameter (%d), not of valid value (0/1), so it was set to 1\n",
4068 if (num_peer_notif
< 0 || num_peer_notif
> 255) {
4069 pr_warning("Warning: num_grat_arp/num_unsol_na (%d) not in range 0-255 so it was reset to 1\n",
4074 /* reset values for 802.3ad/TLB/ALB */
4075 if (BOND_NO_USES_ARP(bond_mode
)) {
4077 pr_warning("Warning: miimon must be specified, otherwise bonding will not detect link failure, speed and duplex which are essential for 802.3ad operation\n");
4078 pr_warning("Forcing miimon to 100msec\n");
4079 miimon
= BOND_DEFAULT_MIIMON
;
4083 if (tx_queues
< 1 || tx_queues
> 255) {
4084 pr_warning("Warning: tx_queues (%d) should be between "
4085 "1 and 255, resetting to %d\n",
4086 tx_queues
, BOND_DEFAULT_TX_QUEUES
);
4087 tx_queues
= BOND_DEFAULT_TX_QUEUES
;
4090 if ((all_slaves_active
!= 0) && (all_slaves_active
!= 1)) {
4091 pr_warning("Warning: all_slaves_active module parameter (%d), "
4092 "not of valid value (0/1), so it was set to "
4093 "0\n", all_slaves_active
);
4094 all_slaves_active
= 0;
4097 if (resend_igmp
< 0 || resend_igmp
> 255) {
4098 pr_warning("Warning: resend_igmp (%d) should be between "
4099 "0 and 255, resetting to %d\n",
4100 resend_igmp
, BOND_DEFAULT_RESEND_IGMP
);
4101 resend_igmp
= BOND_DEFAULT_RESEND_IGMP
;
4104 if (packets_per_slave
< 0 || packets_per_slave
> USHRT_MAX
) {
4105 pr_warn("Warning: packets_per_slave (%d) should be between 0 and %u resetting to 1\n",
4106 packets_per_slave
, USHRT_MAX
);
4107 packets_per_slave
= 1;
4110 if (bond_mode
== BOND_MODE_ALB
) {
4111 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",
4116 if (updelay
|| downdelay
) {
4117 /* just warn the user the up/down delay will have
4118 * no effect since miimon is zero...
4120 pr_warning("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",
4121 updelay
, downdelay
);
4124 /* don't allow arp monitoring */
4126 pr_warning("Warning: miimon (%d) and arp_interval (%d) can't be used simultaneously, disabling ARP monitoring\n",
4127 miimon
, arp_interval
);
4131 if ((updelay
% miimon
) != 0) {
4132 pr_warning("Warning: updelay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
4134 (updelay
/ miimon
) * miimon
);
4139 if ((downdelay
% miimon
) != 0) {
4140 pr_warning("Warning: downdelay (%d) is not a multiple of miimon (%d), downdelay rounded to %d ms\n",
4142 (downdelay
/ miimon
) * miimon
);
4145 downdelay
/= miimon
;
4148 if (arp_interval
< 0) {
4149 pr_warning("Warning: arp_interval module parameter (%d) , not in range 0-%d, so it was reset to %d\n",
4150 arp_interval
, INT_MAX
, BOND_LINK_ARP_INTERV
);
4151 arp_interval
= BOND_LINK_ARP_INTERV
;
4154 for (arp_ip_count
= 0, i
= 0;
4155 (arp_ip_count
< BOND_MAX_ARP_TARGETS
) && arp_ip_target
[i
]; i
++) {
4156 /* not complete check, but should be good enough to
4159 if (!in4_pton(arp_ip_target
[i
], -1, (u8
*)&ip
, -1, NULL
) ||
4160 IS_IP_TARGET_UNUSABLE_ADDRESS(ip
)) {
4161 pr_warning("Warning: bad arp_ip_target module parameter (%s), ARP monitoring will not be performed\n",
4165 if (bond_get_targets_ip(arp_target
, ip
) == -1)
4166 arp_target
[arp_ip_count
++] = ip
;
4168 pr_warning("Warning: duplicate address %pI4 in arp_ip_target, skipping\n",
4173 if (arp_interval
&& !arp_ip_count
) {
4174 /* don't allow arping if no arp_ip_target given... */
4175 pr_warning("Warning: arp_interval module parameter (%d) specified without providing an arp_ip_target parameter, arp_interval was reset to 0\n",
4181 if (bond_mode
!= BOND_MODE_ACTIVEBACKUP
) {
4182 pr_err("arp_validate only supported in active-backup mode\n");
4185 if (!arp_interval
) {
4186 pr_err("arp_validate requires arp_interval\n");
4190 arp_validate_value
= bond_parse_parm(arp_validate
,
4192 if (arp_validate_value
== -1) {
4193 pr_err("Error: invalid arp_validate \"%s\"\n",
4194 arp_validate
== NULL
? "NULL" : arp_validate
);
4198 arp_validate_value
= 0;
4200 arp_all_targets_value
= 0;
4201 if (arp_all_targets
) {
4202 arp_all_targets_value
= bond_parse_parm(arp_all_targets
,
4203 arp_all_targets_tbl
);
4205 if (arp_all_targets_value
== -1) {
4206 pr_err("Error: invalid arp_all_targets_value \"%s\"\n",
4208 arp_all_targets_value
= 0;
4213 pr_info("MII link monitoring set to %d ms\n", miimon
);
4214 } else if (arp_interval
) {
4215 pr_info("ARP monitoring set to %d ms, validate %s, with %d target(s):",
4217 arp_validate_tbl
[arp_validate_value
].modename
,
4220 for (i
= 0; i
< arp_ip_count
; i
++)
4221 pr_info(" %s", arp_ip_target
[i
]);
4225 } else if (max_bonds
) {
4226 /* miimon and arp_interval not set, we need one so things
4227 * work as expected, see bonding.txt for details
4229 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");
4232 if (primary
&& !USES_PRIMARY(bond_mode
)) {
4233 /* currently, using a primary only makes sense
4234 * in active backup, TLB or ALB modes
4236 pr_warning("Warning: %s primary device specified but has no effect in %s mode\n",
4237 primary
, bond_mode_name(bond_mode
));
4241 if (primary
&& primary_reselect
) {
4242 primary_reselect_value
= bond_parse_parm(primary_reselect
,
4244 if (primary_reselect_value
== -1) {
4245 pr_err("Error: Invalid primary_reselect \"%s\"\n",
4247 NULL
? "NULL" : primary_reselect
);
4251 primary_reselect_value
= BOND_PRI_RESELECT_ALWAYS
;
4254 if (fail_over_mac
) {
4255 fail_over_mac_value
= bond_parse_parm(fail_over_mac
,
4257 if (fail_over_mac_value
== -1) {
4258 pr_err("Error: invalid fail_over_mac \"%s\"\n",
4259 arp_validate
== NULL
? "NULL" : arp_validate
);
4263 if (bond_mode
!= BOND_MODE_ACTIVEBACKUP
)
4264 pr_warning("Warning: fail_over_mac only affects active-backup mode.\n");
4266 fail_over_mac_value
= BOND_FOM_NONE
;
4269 if (lp_interval
== 0) {
4270 pr_warning("Warning: ip_interval must be between 1 and %d, so it was reset to %d\n",
4271 INT_MAX
, BOND_ALB_DEFAULT_LP_INTERVAL
);
4272 lp_interval
= BOND_ALB_DEFAULT_LP_INTERVAL
;
4275 /* fill params struct with the proper values */
4276 params
->mode
= bond_mode
;
4277 params
->xmit_policy
= xmit_hashtype
;
4278 params
->miimon
= miimon
;
4279 params
->num_peer_notif
= num_peer_notif
;
4280 params
->arp_interval
= arp_interval
;
4281 params
->arp_validate
= arp_validate_value
;
4282 params
->arp_all_targets
= arp_all_targets_value
;
4283 params
->updelay
= updelay
;
4284 params
->downdelay
= downdelay
;
4285 params
->use_carrier
= use_carrier
;
4286 params
->lacp_fast
= lacp_fast
;
4287 params
->primary
[0] = 0;
4288 params
->primary_reselect
= primary_reselect_value
;
4289 params
->fail_over_mac
= fail_over_mac_value
;
4290 params
->tx_queues
= tx_queues
;
4291 params
->all_slaves_active
= all_slaves_active
;
4292 params
->resend_igmp
= resend_igmp
;
4293 params
->min_links
= min_links
;
4294 params
->lp_interval
= lp_interval
;
4295 if (packets_per_slave
> 1)
4296 params
->packets_per_slave
= reciprocal_value(packets_per_slave
);
4298 params
->packets_per_slave
= packets_per_slave
;
4300 strncpy(params
->primary
, primary
, IFNAMSIZ
);
4301 params
->primary
[IFNAMSIZ
- 1] = 0;
4304 memcpy(params
->arp_targets
, arp_target
, sizeof(arp_target
));
4309 static struct lock_class_key bonding_netdev_xmit_lock_key
;
4310 static struct lock_class_key bonding_netdev_addr_lock_key
;
4311 static struct lock_class_key bonding_tx_busylock_key
;
4313 static void bond_set_lockdep_class_one(struct net_device
*dev
,
4314 struct netdev_queue
*txq
,
4317 lockdep_set_class(&txq
->_xmit_lock
,
4318 &bonding_netdev_xmit_lock_key
);
4321 static void bond_set_lockdep_class(struct net_device
*dev
)
4323 lockdep_set_class(&dev
->addr_list_lock
,
4324 &bonding_netdev_addr_lock_key
);
4325 netdev_for_each_tx_queue(dev
, bond_set_lockdep_class_one
, NULL
);
4326 dev
->qdisc_tx_busylock
= &bonding_tx_busylock_key
;
4330 * Called from registration process
4332 static int bond_init(struct net_device
*bond_dev
)
4334 struct bonding
*bond
= netdev_priv(bond_dev
);
4335 struct bond_net
*bn
= net_generic(dev_net(bond_dev
), bond_net_id
);
4336 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
4338 pr_debug("Begin bond_init for %s\n", bond_dev
->name
);
4341 * Initialize locks that may be required during
4342 * en/deslave operations. All of the bond_open work
4343 * (of which this is part) should really be moved to
4344 * a phase prior to dev_open
4346 spin_lock_init(&(bond_info
->tx_hashtbl_lock
));
4347 spin_lock_init(&(bond_info
->rx_hashtbl_lock
));
4349 bond
->wq
= create_singlethread_workqueue(bond_dev
->name
);
4353 bond_set_lockdep_class(bond_dev
);
4355 list_add_tail(&bond
->bond_list
, &bn
->dev_list
);
4357 bond_prepare_sysfs_group(bond
);
4359 bond_debug_register(bond
);
4361 /* Ensure valid dev_addr */
4362 if (is_zero_ether_addr(bond_dev
->dev_addr
) &&
4363 bond_dev
->addr_assign_type
== NET_ADDR_PERM
)
4364 eth_hw_addr_random(bond_dev
);
4369 unsigned int bond_get_num_tx_queues(void)
4374 /* Create a new bond based on the specified name and bonding parameters.
4375 * If name is NULL, obtain a suitable "bond%d" name for us.
4376 * Caller must NOT hold rtnl_lock; we need to release it here before we
4377 * set up our sysfs entries.
4379 int bond_create(struct net
*net
, const char *name
)
4381 struct net_device
*bond_dev
;
4386 bond_dev
= alloc_netdev_mq(sizeof(struct bonding
),
4387 name
? name
: "bond%d",
4388 bond_setup
, tx_queues
);
4390 pr_err("%s: eek! can't alloc netdev!\n", name
);
4395 dev_net_set(bond_dev
, net
);
4396 bond_dev
->rtnl_link_ops
= &bond_link_ops
;
4398 res
= register_netdevice(bond_dev
);
4400 netif_carrier_off(bond_dev
);
4404 bond_destructor(bond_dev
);
4408 static int __net_init
bond_net_init(struct net
*net
)
4410 struct bond_net
*bn
= net_generic(net
, bond_net_id
);
4413 INIT_LIST_HEAD(&bn
->dev_list
);
4415 bond_create_proc_dir(bn
);
4416 bond_create_sysfs(bn
);
4421 static void __net_exit
bond_net_exit(struct net
*net
)
4423 struct bond_net
*bn
= net_generic(net
, bond_net_id
);
4424 struct bonding
*bond
, *tmp_bond
;
4427 bond_destroy_sysfs(bn
);
4428 bond_destroy_proc_dir(bn
);
4430 /* Kill off any bonds created after unregistering bond rtnl ops */
4432 list_for_each_entry_safe(bond
, tmp_bond
, &bn
->dev_list
, bond_list
)
4433 unregister_netdevice_queue(bond
->dev
, &list
);
4434 unregister_netdevice_many(&list
);
4438 static struct pernet_operations bond_net_ops
= {
4439 .init
= bond_net_init
,
4440 .exit
= bond_net_exit
,
4442 .size
= sizeof(struct bond_net
),
4445 static int __init
bonding_init(void)
4450 pr_info("%s", bond_version
);
4452 res
= bond_check_params(&bonding_defaults
);
4456 res
= register_pernet_subsys(&bond_net_ops
);
4460 res
= bond_netlink_init();
4464 bond_create_debugfs();
4466 for (i
= 0; i
< max_bonds
; i
++) {
4467 res
= bond_create(&init_net
, NULL
);
4472 register_netdevice_notifier(&bond_netdev_notifier
);
4476 bond_netlink_fini();
4478 unregister_pernet_subsys(&bond_net_ops
);
4483 static void __exit
bonding_exit(void)
4485 unregister_netdevice_notifier(&bond_netdev_notifier
);
4487 bond_destroy_debugfs();
4489 bond_netlink_fini();
4490 unregister_pernet_subsys(&bond_net_ops
);
4492 #ifdef CONFIG_NET_POLL_CONTROLLER
4494 * Make sure we don't have an imbalance on our netpoll blocking
4496 WARN_ON(atomic_read(&netpoll_block_tx
));
4500 module_init(bonding_init
);
4501 module_exit(bonding_exit
);
4502 MODULE_LICENSE("GPL");
4503 MODULE_VERSION(DRV_VERSION
);
4504 MODULE_DESCRIPTION(DRV_DESCRIPTION
", v" DRV_VERSION
);
4505 MODULE_AUTHOR("Thomas Davis, tadavis@lbl.gov and many others");