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>
57 #include <asm/system.h>
59 #include <linux/uaccess.h>
60 #include <linux/errno.h>
61 #include <linux/netdevice.h>
62 #include <linux/netpoll.h>
63 #include <linux/inetdevice.h>
64 #include <linux/igmp.h>
65 #include <linux/etherdevice.h>
66 #include <linux/skbuff.h>
68 #include <linux/rtnetlink.h>
69 #include <linux/proc_fs.h>
70 #include <linux/seq_file.h>
71 #include <linux/smp.h>
72 #include <linux/if_ether.h>
74 #include <linux/mii.h>
75 #include <linux/ethtool.h>
76 #include <linux/if_vlan.h>
77 #include <linux/if_bonding.h>
78 #include <linux/jiffies.h>
79 #include <net/route.h>
80 #include <net/net_namespace.h>
81 #include <net/netns/generic.h>
86 /*---------------------------- Module parameters ----------------------------*/
88 /* monitor all links that often (in milliseconds). <=0 disables monitoring */
89 #define BOND_LINK_MON_INTERV 0
90 #define BOND_LINK_ARP_INTERV 0
92 static int max_bonds
= BOND_DEFAULT_MAX_BONDS
;
93 static int tx_queues
= BOND_DEFAULT_TX_QUEUES
;
94 static int num_grat_arp
= 1;
95 static int num_unsol_na
= 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 char *ad_select
;
105 static char *xmit_hash_policy
;
106 static int arp_interval
= BOND_LINK_ARP_INTERV
;
107 static char *arp_ip_target
[BOND_MAX_ARP_TARGETS
];
108 static char *arp_validate
;
109 static char *fail_over_mac
;
110 static int all_slaves_active
= 0;
111 static struct bond_params bonding_defaults
;
112 static int resend_igmp
= BOND_DEFAULT_RESEND_IGMP
;
114 module_param(max_bonds
, int, 0);
115 MODULE_PARM_DESC(max_bonds
, "Max number of bonded devices");
116 module_param(tx_queues
, int, 0);
117 MODULE_PARM_DESC(tx_queues
, "Max number of transmit queues (default = 16)");
118 module_param(num_grat_arp
, int, 0644);
119 MODULE_PARM_DESC(num_grat_arp
, "Number of gratuitous ARP packets to send on failover event");
120 module_param(num_unsol_na
, int, 0644);
121 MODULE_PARM_DESC(num_unsol_na
, "Number of unsolicited IPv6 Neighbor Advertisements packets to send on failover event");
122 module_param(miimon
, int, 0);
123 MODULE_PARM_DESC(miimon
, "Link check interval in milliseconds");
124 module_param(updelay
, int, 0);
125 MODULE_PARM_DESC(updelay
, "Delay before considering link up, in milliseconds");
126 module_param(downdelay
, int, 0);
127 MODULE_PARM_DESC(downdelay
, "Delay before considering link down, "
129 module_param(use_carrier
, int, 0);
130 MODULE_PARM_DESC(use_carrier
, "Use netif_carrier_ok (vs MII ioctls) in miimon; "
131 "0 for off, 1 for on (default)");
132 module_param(mode
, charp
, 0);
133 MODULE_PARM_DESC(mode
, "Mode of operation : 0 for balance-rr, "
134 "1 for active-backup, 2 for balance-xor, "
135 "3 for broadcast, 4 for 802.3ad, 5 for balance-tlb, "
136 "6 for balance-alb");
137 module_param(primary
, charp
, 0);
138 MODULE_PARM_DESC(primary
, "Primary network device to use");
139 module_param(primary_reselect
, charp
, 0);
140 MODULE_PARM_DESC(primary_reselect
, "Reselect primary slave "
142 "0 for always (default), "
143 "1 for only if speed of primary is "
145 "2 for only on active slave "
147 module_param(lacp_rate
, charp
, 0);
148 MODULE_PARM_DESC(lacp_rate
, "LACPDU tx rate to request from 802.3ad partner "
150 module_param(ad_select
, charp
, 0);
151 MODULE_PARM_DESC(ad_select
, "803.ad aggregation selection logic: stable (0, default), bandwidth (1), count (2)");
152 module_param(xmit_hash_policy
, charp
, 0);
153 MODULE_PARM_DESC(xmit_hash_policy
, "XOR hashing method: 0 for layer 2 (default)"
154 ", 1 for layer 3+4");
155 module_param(arp_interval
, int, 0);
156 MODULE_PARM_DESC(arp_interval
, "arp interval in milliseconds");
157 module_param_array(arp_ip_target
, charp
, NULL
, 0);
158 MODULE_PARM_DESC(arp_ip_target
, "arp targets in n.n.n.n form");
159 module_param(arp_validate
, charp
, 0);
160 MODULE_PARM_DESC(arp_validate
, "validate src/dst of ARP probes: none (default), active, backup or all");
161 module_param(fail_over_mac
, charp
, 0);
162 MODULE_PARM_DESC(fail_over_mac
, "For active-backup, do not set all slaves to the same MAC. none (default), active or follow");
163 module_param(all_slaves_active
, int, 0);
164 MODULE_PARM_DESC(all_slaves_active
, "Keep all frames received on an interface"
165 "by setting active flag for all slaves. "
166 "0 for never (default), 1 for always.");
167 module_param(resend_igmp
, int, 0);
168 MODULE_PARM_DESC(resend_igmp
, "Number of IGMP membership reports to send on link failure");
170 /*----------------------------- Global variables ----------------------------*/
172 static const char * const version
=
173 DRV_DESCRIPTION
": v" DRV_VERSION
" (" DRV_RELDATE
")\n";
175 int bond_net_id __read_mostly
;
177 static __be32 arp_target
[BOND_MAX_ARP_TARGETS
];
178 static int arp_ip_count
;
179 static int bond_mode
= BOND_MODE_ROUNDROBIN
;
180 static int xmit_hashtype
= BOND_XMIT_POLICY_LAYER2
;
181 static int lacp_fast
;
182 #ifdef CONFIG_NET_POLL_CONTROLLER
183 static int disable_netpoll
= 1;
186 const struct bond_parm_tbl bond_lacp_tbl
[] = {
187 { "slow", AD_LACP_SLOW
},
188 { "fast", AD_LACP_FAST
},
192 const struct bond_parm_tbl bond_mode_tbl
[] = {
193 { "balance-rr", BOND_MODE_ROUNDROBIN
},
194 { "active-backup", BOND_MODE_ACTIVEBACKUP
},
195 { "balance-xor", BOND_MODE_XOR
},
196 { "broadcast", BOND_MODE_BROADCAST
},
197 { "802.3ad", BOND_MODE_8023AD
},
198 { "balance-tlb", BOND_MODE_TLB
},
199 { "balance-alb", BOND_MODE_ALB
},
203 const struct bond_parm_tbl xmit_hashtype_tbl
[] = {
204 { "layer2", BOND_XMIT_POLICY_LAYER2
},
205 { "layer3+4", BOND_XMIT_POLICY_LAYER34
},
206 { "layer2+3", BOND_XMIT_POLICY_LAYER23
},
210 const struct bond_parm_tbl arp_validate_tbl
[] = {
211 { "none", BOND_ARP_VALIDATE_NONE
},
212 { "active", BOND_ARP_VALIDATE_ACTIVE
},
213 { "backup", BOND_ARP_VALIDATE_BACKUP
},
214 { "all", BOND_ARP_VALIDATE_ALL
},
218 const struct bond_parm_tbl fail_over_mac_tbl
[] = {
219 { "none", BOND_FOM_NONE
},
220 { "active", BOND_FOM_ACTIVE
},
221 { "follow", BOND_FOM_FOLLOW
},
225 const struct bond_parm_tbl pri_reselect_tbl
[] = {
226 { "always", BOND_PRI_RESELECT_ALWAYS
},
227 { "better", BOND_PRI_RESELECT_BETTER
},
228 { "failure", BOND_PRI_RESELECT_FAILURE
},
232 struct bond_parm_tbl ad_select_tbl
[] = {
233 { "stable", BOND_AD_STABLE
},
234 { "bandwidth", BOND_AD_BANDWIDTH
},
235 { "count", BOND_AD_COUNT
},
239 /*-------------------------- Forward declarations ---------------------------*/
241 static void bond_send_gratuitous_arp(struct bonding
*bond
);
242 static int bond_init(struct net_device
*bond_dev
);
243 static void bond_uninit(struct net_device
*bond_dev
);
245 /*---------------------------- General routines -----------------------------*/
247 static const char *bond_mode_name(int mode
)
249 static const char *names
[] = {
250 [BOND_MODE_ROUNDROBIN
] = "load balancing (round-robin)",
251 [BOND_MODE_ACTIVEBACKUP
] = "fault-tolerance (active-backup)",
252 [BOND_MODE_XOR
] = "load balancing (xor)",
253 [BOND_MODE_BROADCAST
] = "fault-tolerance (broadcast)",
254 [BOND_MODE_8023AD
] = "IEEE 802.3ad Dynamic link aggregation",
255 [BOND_MODE_TLB
] = "transmit load balancing",
256 [BOND_MODE_ALB
] = "adaptive load balancing",
259 if (mode
< 0 || mode
> BOND_MODE_ALB
)
265 /*---------------------------------- VLAN -----------------------------------*/
268 * bond_add_vlan - add a new vlan id on bond
269 * @bond: bond that got the notification
270 * @vlan_id: the vlan id to add
272 * Returns -ENOMEM if allocation failed.
274 static int bond_add_vlan(struct bonding
*bond
, unsigned short vlan_id
)
276 struct vlan_entry
*vlan
;
278 pr_debug("bond: %s, vlan id %d\n",
279 (bond
? bond
->dev
->name
: "None"), vlan_id
);
281 vlan
= kzalloc(sizeof(struct vlan_entry
), GFP_KERNEL
);
285 INIT_LIST_HEAD(&vlan
->vlan_list
);
286 vlan
->vlan_id
= vlan_id
;
288 write_lock_bh(&bond
->lock
);
290 list_add_tail(&vlan
->vlan_list
, &bond
->vlan_list
);
292 write_unlock_bh(&bond
->lock
);
294 pr_debug("added VLAN ID %d on bond %s\n", vlan_id
, bond
->dev
->name
);
300 * bond_del_vlan - delete a vlan id from bond
301 * @bond: bond that got the notification
302 * @vlan_id: the vlan id to delete
304 * returns -ENODEV if @vlan_id was not found in @bond.
306 static int bond_del_vlan(struct bonding
*bond
, unsigned short vlan_id
)
308 struct vlan_entry
*vlan
;
311 pr_debug("bond: %s, vlan id %d\n", bond
->dev
->name
, vlan_id
);
313 write_lock_bh(&bond
->lock
);
315 list_for_each_entry(vlan
, &bond
->vlan_list
, vlan_list
) {
316 if (vlan
->vlan_id
== vlan_id
) {
317 list_del(&vlan
->vlan_list
);
319 if (bond_is_lb(bond
))
320 bond_alb_clear_vlan(bond
, vlan_id
);
322 pr_debug("removed VLAN ID %d from bond %s\n",
323 vlan_id
, bond
->dev
->name
);
327 if (list_empty(&bond
->vlan_list
) &&
328 (bond
->slave_cnt
== 0)) {
329 /* Last VLAN removed and no slaves, so
330 * restore block on adding VLANs. This will
331 * be removed once new slaves that are not
332 * VLAN challenged will be added.
334 bond
->dev
->features
|= NETIF_F_VLAN_CHALLENGED
;
342 pr_debug("couldn't find VLAN ID %d in bond %s\n",
343 vlan_id
, bond
->dev
->name
);
346 write_unlock_bh(&bond
->lock
);
351 * bond_has_challenged_slaves
352 * @bond: the bond we're working on
354 * Searches the slave list. Returns 1 if a vlan challenged slave
355 * was found, 0 otherwise.
357 * Assumes bond->lock is held.
359 static int bond_has_challenged_slaves(struct bonding
*bond
)
364 bond_for_each_slave(bond
, slave
, i
) {
365 if (slave
->dev
->features
& NETIF_F_VLAN_CHALLENGED
) {
366 pr_debug("found VLAN challenged slave - %s\n",
372 pr_debug("no VLAN challenged slaves found\n");
377 * bond_next_vlan - safely skip to the next item in the vlans list.
378 * @bond: the bond we're working on
379 * @curr: item we're advancing from
381 * Returns %NULL if list is empty, bond->next_vlan if @curr is %NULL,
382 * or @curr->next otherwise (even if it is @curr itself again).
384 * Caller must hold bond->lock
386 struct vlan_entry
*bond_next_vlan(struct bonding
*bond
, struct vlan_entry
*curr
)
388 struct vlan_entry
*next
, *last
;
390 if (list_empty(&bond
->vlan_list
))
394 next
= list_entry(bond
->vlan_list
.next
,
395 struct vlan_entry
, vlan_list
);
397 last
= list_entry(bond
->vlan_list
.prev
,
398 struct vlan_entry
, vlan_list
);
400 next
= list_entry(bond
->vlan_list
.next
,
401 struct vlan_entry
, vlan_list
);
403 next
= list_entry(curr
->vlan_list
.next
,
404 struct vlan_entry
, vlan_list
);
412 * bond_dev_queue_xmit - Prepare skb for xmit.
414 * @bond: bond device that got this skb for tx.
415 * @skb: hw accel VLAN tagged skb to transmit
416 * @slave_dev: slave that is supposed to xmit this skbuff
418 * When the bond gets an skb to transmit that is
419 * already hardware accelerated VLAN tagged, and it
420 * needs to relay this skb to a slave that is not
421 * hw accel capable, the skb needs to be "unaccelerated",
422 * i.e. strip the hwaccel tag and re-insert it as part
425 int bond_dev_queue_xmit(struct bonding
*bond
, struct sk_buff
*skb
,
426 struct net_device
*slave_dev
)
428 unsigned short uninitialized_var(vlan_id
);
430 /* Test vlan_list not vlgrp to catch and handle 802.1p tags */
431 if (!list_empty(&bond
->vlan_list
) &&
432 !(slave_dev
->features
& NETIF_F_HW_VLAN_TX
) &&
433 vlan_get_tag(skb
, &vlan_id
) == 0) {
434 skb
->dev
= slave_dev
;
435 skb
= vlan_put_tag(skb
, vlan_id
);
437 /* vlan_put_tag() frees the skb in case of error,
438 * so return success here so the calling functions
439 * won't attempt to free is again.
444 skb
->dev
= slave_dev
;
448 #ifdef CONFIG_NET_POLL_CONTROLLER
449 if (unlikely(bond
->dev
->priv_flags
& IFF_IN_NETPOLL
)) {
450 struct netpoll
*np
= bond
->dev
->npinfo
->netpoll
;
451 slave_dev
->npinfo
= bond
->dev
->npinfo
;
452 np
->real_dev
= np
->dev
= skb
->dev
;
453 slave_dev
->priv_flags
|= IFF_IN_NETPOLL
;
454 netpoll_send_skb(np
, skb
);
455 slave_dev
->priv_flags
&= ~IFF_IN_NETPOLL
;
465 * In the following 3 functions, bond_vlan_rx_register(), bond_vlan_rx_add_vid
466 * and bond_vlan_rx_kill_vid, We don't protect the slave list iteration with a
468 * a. This operation is performed in IOCTL context,
469 * b. The operation is protected by the RTNL semaphore in the 8021q code,
470 * c. Holding a lock with BH disabled while directly calling a base driver
471 * entry point is generally a BAD idea.
473 * The design of synchronization/protection for this operation in the 8021q
474 * module is good for one or more VLAN devices over a single physical device
475 * and cannot be extended for a teaming solution like bonding, so there is a
476 * potential race condition here where a net device from the vlan group might
477 * be referenced (either by a base driver or the 8021q code) while it is being
478 * removed from the system. However, it turns out we're not making matters
479 * worse, and if it works for regular VLAN usage it will work here too.
483 * bond_vlan_rx_register - Propagates registration to slaves
484 * @bond_dev: bonding net device that got called
485 * @grp: vlan group being registered
487 static void bond_vlan_rx_register(struct net_device
*bond_dev
,
488 struct vlan_group
*grp
)
490 struct bonding
*bond
= netdev_priv(bond_dev
);
494 write_lock(&bond
->lock
);
496 write_unlock(&bond
->lock
);
498 bond_for_each_slave(bond
, slave
, i
) {
499 struct net_device
*slave_dev
= slave
->dev
;
500 const struct net_device_ops
*slave_ops
= slave_dev
->netdev_ops
;
502 if ((slave_dev
->features
& NETIF_F_HW_VLAN_RX
) &&
503 slave_ops
->ndo_vlan_rx_register
) {
504 slave_ops
->ndo_vlan_rx_register(slave_dev
, grp
);
510 * bond_vlan_rx_add_vid - Propagates adding an id to slaves
511 * @bond_dev: bonding net device that got called
512 * @vid: vlan id being added
514 static void bond_vlan_rx_add_vid(struct net_device
*bond_dev
, uint16_t vid
)
516 struct bonding
*bond
= netdev_priv(bond_dev
);
520 bond_for_each_slave(bond
, slave
, i
) {
521 struct net_device
*slave_dev
= slave
->dev
;
522 const struct net_device_ops
*slave_ops
= slave_dev
->netdev_ops
;
524 if ((slave_dev
->features
& NETIF_F_HW_VLAN_FILTER
) &&
525 slave_ops
->ndo_vlan_rx_add_vid
) {
526 slave_ops
->ndo_vlan_rx_add_vid(slave_dev
, vid
);
530 res
= bond_add_vlan(bond
, vid
);
532 pr_err("%s: Error: Failed to add vlan id %d\n",
533 bond_dev
->name
, vid
);
538 * bond_vlan_rx_kill_vid - Propagates deleting an id to slaves
539 * @bond_dev: bonding net device that got called
540 * @vid: vlan id being removed
542 static void bond_vlan_rx_kill_vid(struct net_device
*bond_dev
, uint16_t vid
)
544 struct bonding
*bond
= netdev_priv(bond_dev
);
546 struct net_device
*vlan_dev
;
549 bond_for_each_slave(bond
, slave
, i
) {
550 struct net_device
*slave_dev
= slave
->dev
;
551 const struct net_device_ops
*slave_ops
= slave_dev
->netdev_ops
;
553 if ((slave_dev
->features
& NETIF_F_HW_VLAN_FILTER
) &&
554 slave_ops
->ndo_vlan_rx_kill_vid
) {
555 /* Save and then restore vlan_dev in the grp array,
556 * since the slave's driver might clear it.
558 vlan_dev
= vlan_group_get_device(bond
->vlgrp
, vid
);
559 slave_ops
->ndo_vlan_rx_kill_vid(slave_dev
, vid
);
560 vlan_group_set_device(bond
->vlgrp
, vid
, vlan_dev
);
564 res
= bond_del_vlan(bond
, vid
);
566 pr_err("%s: Error: Failed to remove vlan id %d\n",
567 bond_dev
->name
, vid
);
571 static void bond_add_vlans_on_slave(struct bonding
*bond
, struct net_device
*slave_dev
)
573 struct vlan_entry
*vlan
;
574 const struct net_device_ops
*slave_ops
= slave_dev
->netdev_ops
;
579 if ((slave_dev
->features
& NETIF_F_HW_VLAN_RX
) &&
580 slave_ops
->ndo_vlan_rx_register
)
581 slave_ops
->ndo_vlan_rx_register(slave_dev
, bond
->vlgrp
);
583 if (!(slave_dev
->features
& NETIF_F_HW_VLAN_FILTER
) ||
584 !(slave_ops
->ndo_vlan_rx_add_vid
))
587 list_for_each_entry(vlan
, &bond
->vlan_list
, vlan_list
)
588 slave_ops
->ndo_vlan_rx_add_vid(slave_dev
, vlan
->vlan_id
);
591 static void bond_del_vlans_from_slave(struct bonding
*bond
,
592 struct net_device
*slave_dev
)
594 const struct net_device_ops
*slave_ops
= slave_dev
->netdev_ops
;
595 struct vlan_entry
*vlan
;
596 struct net_device
*vlan_dev
;
601 if (!(slave_dev
->features
& NETIF_F_HW_VLAN_FILTER
) ||
602 !(slave_ops
->ndo_vlan_rx_kill_vid
))
605 list_for_each_entry(vlan
, &bond
->vlan_list
, vlan_list
) {
608 /* Save and then restore vlan_dev in the grp array,
609 * since the slave's driver might clear it.
611 vlan_dev
= vlan_group_get_device(bond
->vlgrp
, vlan
->vlan_id
);
612 slave_ops
->ndo_vlan_rx_kill_vid(slave_dev
, vlan
->vlan_id
);
613 vlan_group_set_device(bond
->vlgrp
, vlan
->vlan_id
, vlan_dev
);
617 if ((slave_dev
->features
& NETIF_F_HW_VLAN_RX
) &&
618 slave_ops
->ndo_vlan_rx_register
)
619 slave_ops
->ndo_vlan_rx_register(slave_dev
, NULL
);
622 /*------------------------------- Link status -------------------------------*/
625 * Set the carrier state for the master according to the state of its
626 * slaves. If any slaves are up, the master is up. In 802.3ad mode,
627 * do special 802.3ad magic.
629 * Returns zero if carrier state does not change, nonzero if it does.
631 static int bond_set_carrier(struct bonding
*bond
)
636 if (bond
->slave_cnt
== 0)
639 if (bond
->params
.mode
== BOND_MODE_8023AD
)
640 return bond_3ad_set_carrier(bond
);
642 bond_for_each_slave(bond
, slave
, i
) {
643 if (slave
->link
== BOND_LINK_UP
) {
644 if (!netif_carrier_ok(bond
->dev
)) {
645 netif_carrier_on(bond
->dev
);
653 if (netif_carrier_ok(bond
->dev
)) {
654 netif_carrier_off(bond
->dev
);
661 * Get link speed and duplex from the slave's base driver
662 * using ethtool. If for some reason the call fails or the
663 * values are invalid, fake speed and duplex to 100/Full
666 static int bond_update_speed_duplex(struct slave
*slave
)
668 struct net_device
*slave_dev
= slave
->dev
;
669 struct ethtool_cmd etool
;
672 /* Fake speed and duplex */
673 slave
->speed
= SPEED_100
;
674 slave
->duplex
= DUPLEX_FULL
;
676 if (!slave_dev
->ethtool_ops
|| !slave_dev
->ethtool_ops
->get_settings
)
679 res
= slave_dev
->ethtool_ops
->get_settings(slave_dev
, &etool
);
683 switch (etool
.speed
) {
693 switch (etool
.duplex
) {
701 slave
->speed
= etool
.speed
;
702 slave
->duplex
= etool
.duplex
;
708 * if <dev> supports MII link status reporting, check its link status.
710 * We either do MII/ETHTOOL ioctls, or check netif_carrier_ok(),
711 * depending upon the setting of the use_carrier parameter.
713 * Return either BMSR_LSTATUS, meaning that the link is up (or we
714 * can't tell and just pretend it is), or 0, meaning that the link is
717 * If reporting is non-zero, instead of faking link up, return -1 if
718 * both ETHTOOL and MII ioctls fail (meaning the device does not
719 * support them). If use_carrier is set, return whatever it says.
720 * It'd be nice if there was a good way to tell if a driver supports
721 * netif_carrier, but there really isn't.
723 static int bond_check_dev_link(struct bonding
*bond
,
724 struct net_device
*slave_dev
, int reporting
)
726 const struct net_device_ops
*slave_ops
= slave_dev
->netdev_ops
;
727 int (*ioctl
)(struct net_device
*, struct ifreq
*, int);
729 struct mii_ioctl_data
*mii
;
731 if (!reporting
&& !netif_running(slave_dev
))
734 if (bond
->params
.use_carrier
)
735 return netif_carrier_ok(slave_dev
) ? BMSR_LSTATUS
: 0;
737 /* Try to get link status using Ethtool first. */
738 if (slave_dev
->ethtool_ops
) {
739 if (slave_dev
->ethtool_ops
->get_link
) {
742 link
= slave_dev
->ethtool_ops
->get_link(slave_dev
);
744 return link
? BMSR_LSTATUS
: 0;
748 /* Ethtool can't be used, fallback to MII ioctls. */
749 ioctl
= slave_ops
->ndo_do_ioctl
;
751 /* TODO: set pointer to correct ioctl on a per team member */
752 /* bases to make this more efficient. that is, once */
753 /* we determine the correct ioctl, we will always */
754 /* call it and not the others for that team */
758 * We cannot assume that SIOCGMIIPHY will also read a
759 * register; not all network drivers (e.g., e100)
763 /* Yes, the mii is overlaid on the ifreq.ifr_ifru */
764 strncpy(ifr
.ifr_name
, slave_dev
->name
, IFNAMSIZ
);
766 if (IOCTL(slave_dev
, &ifr
, SIOCGMIIPHY
) == 0) {
767 mii
->reg_num
= MII_BMSR
;
768 if (IOCTL(slave_dev
, &ifr
, SIOCGMIIREG
) == 0)
769 return mii
->val_out
& BMSR_LSTATUS
;
774 * If reporting, report that either there's no dev->do_ioctl,
775 * or both SIOCGMIIREG and get_link failed (meaning that we
776 * cannot report link status). If not reporting, pretend
779 return reporting
? -1 : BMSR_LSTATUS
;
782 /*----------------------------- Multicast list ------------------------------*/
785 * Push the promiscuity flag down to appropriate slaves
787 static int bond_set_promiscuity(struct bonding
*bond
, int inc
)
790 if (USES_PRIMARY(bond
->params
.mode
)) {
791 /* write lock already acquired */
792 if (bond
->curr_active_slave
) {
793 err
= dev_set_promiscuity(bond
->curr_active_slave
->dev
,
799 bond_for_each_slave(bond
, slave
, i
) {
800 err
= dev_set_promiscuity(slave
->dev
, inc
);
809 * Push the allmulti flag down to all slaves
811 static int bond_set_allmulti(struct bonding
*bond
, int inc
)
814 if (USES_PRIMARY(bond
->params
.mode
)) {
815 /* write lock already acquired */
816 if (bond
->curr_active_slave
) {
817 err
= dev_set_allmulti(bond
->curr_active_slave
->dev
,
823 bond_for_each_slave(bond
, slave
, i
) {
824 err
= dev_set_allmulti(slave
->dev
, inc
);
833 * Add a Multicast address to slaves
836 static void bond_mc_add(struct bonding
*bond
, void *addr
)
838 if (USES_PRIMARY(bond
->params
.mode
)) {
839 /* write lock already acquired */
840 if (bond
->curr_active_slave
)
841 dev_mc_add(bond
->curr_active_slave
->dev
, addr
);
846 bond_for_each_slave(bond
, slave
, i
)
847 dev_mc_add(slave
->dev
, addr
);
852 * Remove a multicast address from slave
855 static void bond_mc_del(struct bonding
*bond
, void *addr
)
857 if (USES_PRIMARY(bond
->params
.mode
)) {
858 /* write lock already acquired */
859 if (bond
->curr_active_slave
)
860 dev_mc_del(bond
->curr_active_slave
->dev
, addr
);
864 bond_for_each_slave(bond
, slave
, i
) {
865 dev_mc_del(slave
->dev
, addr
);
871 static void __bond_resend_igmp_join_requests(struct net_device
*dev
)
873 struct in_device
*in_dev
;
874 struct ip_mc_list
*im
;
877 in_dev
= __in_dev_get_rcu(dev
);
879 for (im
= in_dev
->mc_list
; im
; im
= im
->next
)
880 ip_mc_rejoin_group(im
);
887 * Retrieve the list of registered multicast addresses for the bonding
888 * device and retransmit an IGMP JOIN request to the current active
891 static void bond_resend_igmp_join_requests(struct bonding
*bond
)
893 struct net_device
*vlan_dev
;
894 struct vlan_entry
*vlan
;
896 read_lock(&bond
->lock
);
898 /* rejoin all groups on bond device */
899 __bond_resend_igmp_join_requests(bond
->dev
);
901 /* rejoin all groups on vlan devices */
903 list_for_each_entry(vlan
, &bond
->vlan_list
, vlan_list
) {
904 vlan_dev
= vlan_group_get_device(bond
->vlgrp
,
907 __bond_resend_igmp_join_requests(vlan_dev
);
911 if (--bond
->igmp_retrans
> 0)
912 queue_delayed_work(bond
->wq
, &bond
->mcast_work
, HZ
/5);
914 read_unlock(&bond
->lock
);
917 void bond_resend_igmp_join_requests_delayed(struct work_struct
*work
)
919 struct bonding
*bond
= container_of(work
, struct bonding
,
921 bond_resend_igmp_join_requests(bond
);
925 * flush all members of flush->mc_list from device dev->mc_list
927 static void bond_mc_list_flush(struct net_device
*bond_dev
,
928 struct net_device
*slave_dev
)
930 struct bonding
*bond
= netdev_priv(bond_dev
);
931 struct netdev_hw_addr
*ha
;
933 netdev_for_each_mc_addr(ha
, bond_dev
)
934 dev_mc_del(slave_dev
, ha
->addr
);
936 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
937 /* del lacpdu mc addr from mc list */
938 u8 lacpdu_multicast
[ETH_ALEN
] = MULTICAST_LACPDU_ADDR
;
940 dev_mc_del(slave_dev
, lacpdu_multicast
);
944 /*--------------------------- Active slave change ---------------------------*/
947 * Update the mc list and multicast-related flags for the new and
948 * old active slaves (if any) according to the multicast mode, and
949 * promiscuous flags unconditionally.
951 static void bond_mc_swap(struct bonding
*bond
, struct slave
*new_active
,
952 struct slave
*old_active
)
954 struct netdev_hw_addr
*ha
;
956 if (!USES_PRIMARY(bond
->params
.mode
))
957 /* nothing to do - mc list is already up-to-date on
963 if (bond
->dev
->flags
& IFF_PROMISC
)
964 dev_set_promiscuity(old_active
->dev
, -1);
966 if (bond
->dev
->flags
& IFF_ALLMULTI
)
967 dev_set_allmulti(old_active
->dev
, -1);
969 netdev_for_each_mc_addr(ha
, bond
->dev
)
970 dev_mc_del(old_active
->dev
, ha
->addr
);
974 /* FIXME: Signal errors upstream. */
975 if (bond
->dev
->flags
& IFF_PROMISC
)
976 dev_set_promiscuity(new_active
->dev
, 1);
978 if (bond
->dev
->flags
& IFF_ALLMULTI
)
979 dev_set_allmulti(new_active
->dev
, 1);
981 netdev_for_each_mc_addr(ha
, bond
->dev
)
982 dev_mc_add(new_active
->dev
, ha
->addr
);
987 * bond_do_fail_over_mac
989 * Perform special MAC address swapping for fail_over_mac settings
991 * Called with RTNL, bond->lock for read, curr_slave_lock for write_bh.
993 static void bond_do_fail_over_mac(struct bonding
*bond
,
994 struct slave
*new_active
,
995 struct slave
*old_active
)
996 __releases(&bond
->curr_slave_lock
)
997 __releases(&bond
->lock
)
998 __acquires(&bond
->lock
)
999 __acquires(&bond
->curr_slave_lock
)
1001 u8 tmp_mac
[ETH_ALEN
];
1002 struct sockaddr saddr
;
1005 switch (bond
->params
.fail_over_mac
) {
1006 case BOND_FOM_ACTIVE
:
1008 memcpy(bond
->dev
->dev_addr
, new_active
->dev
->dev_addr
,
1009 new_active
->dev
->addr_len
);
1011 case BOND_FOM_FOLLOW
:
1013 * if new_active && old_active, swap them
1014 * if just old_active, do nothing (going to no active slave)
1015 * if just new_active, set new_active to bond's MAC
1020 write_unlock_bh(&bond
->curr_slave_lock
);
1021 read_unlock(&bond
->lock
);
1024 memcpy(tmp_mac
, new_active
->dev
->dev_addr
, ETH_ALEN
);
1025 memcpy(saddr
.sa_data
, old_active
->dev
->dev_addr
,
1027 saddr
.sa_family
= new_active
->dev
->type
;
1029 memcpy(saddr
.sa_data
, bond
->dev
->dev_addr
, ETH_ALEN
);
1030 saddr
.sa_family
= bond
->dev
->type
;
1033 rv
= dev_set_mac_address(new_active
->dev
, &saddr
);
1035 pr_err("%s: Error %d setting MAC of slave %s\n",
1036 bond
->dev
->name
, -rv
, new_active
->dev
->name
);
1043 memcpy(saddr
.sa_data
, tmp_mac
, ETH_ALEN
);
1044 saddr
.sa_family
= old_active
->dev
->type
;
1046 rv
= dev_set_mac_address(old_active
->dev
, &saddr
);
1048 pr_err("%s: Error %d setting MAC of slave %s\n",
1049 bond
->dev
->name
, -rv
, new_active
->dev
->name
);
1051 read_lock(&bond
->lock
);
1052 write_lock_bh(&bond
->curr_slave_lock
);
1055 pr_err("%s: bond_do_fail_over_mac impossible: bad policy %d\n",
1056 bond
->dev
->name
, bond
->params
.fail_over_mac
);
1062 static bool bond_should_change_active(struct bonding
*bond
)
1064 struct slave
*prim
= bond
->primary_slave
;
1065 struct slave
*curr
= bond
->curr_active_slave
;
1067 if (!prim
|| !curr
|| curr
->link
!= BOND_LINK_UP
)
1069 if (bond
->force_primary
) {
1070 bond
->force_primary
= false;
1073 if (bond
->params
.primary_reselect
== BOND_PRI_RESELECT_BETTER
&&
1074 (prim
->speed
< curr
->speed
||
1075 (prim
->speed
== curr
->speed
&& prim
->duplex
<= curr
->duplex
)))
1077 if (bond
->params
.primary_reselect
== BOND_PRI_RESELECT_FAILURE
)
1083 * find_best_interface - select the best available slave to be the active one
1084 * @bond: our bonding struct
1086 * Warning: Caller must hold curr_slave_lock for writing.
1088 static struct slave
*bond_find_best_slave(struct bonding
*bond
)
1090 struct slave
*new_active
, *old_active
;
1091 struct slave
*bestslave
= NULL
;
1092 int mintime
= bond
->params
.updelay
;
1095 new_active
= bond
->curr_active_slave
;
1097 if (!new_active
) { /* there were no active slaves left */
1098 if (bond
->slave_cnt
> 0) /* found one slave */
1099 new_active
= bond
->first_slave
;
1101 return NULL
; /* still no slave, return NULL */
1104 if ((bond
->primary_slave
) &&
1105 bond
->primary_slave
->link
== BOND_LINK_UP
&&
1106 bond_should_change_active(bond
)) {
1107 new_active
= bond
->primary_slave
;
1110 /* remember where to stop iterating over the slaves */
1111 old_active
= new_active
;
1113 bond_for_each_slave_from(bond
, new_active
, i
, old_active
) {
1114 if (new_active
->link
== BOND_LINK_UP
) {
1116 } else if (new_active
->link
== BOND_LINK_BACK
&&
1117 IS_UP(new_active
->dev
)) {
1118 /* link up, but waiting for stabilization */
1119 if (new_active
->delay
< mintime
) {
1120 mintime
= new_active
->delay
;
1121 bestslave
= new_active
;
1130 * change_active_interface - change the active slave into the specified one
1131 * @bond: our bonding struct
1132 * @new: the new slave to make the active one
1134 * Set the new slave to the bond's settings and unset them on the old
1135 * curr_active_slave.
1136 * Setting include flags, mc-list, promiscuity, allmulti, etc.
1138 * If @new's link state is %BOND_LINK_BACK we'll set it to %BOND_LINK_UP,
1139 * because it is apparently the best available slave we have, even though its
1140 * updelay hasn't timed out yet.
1142 * If new_active is not NULL, caller must hold bond->lock for read and
1143 * curr_slave_lock for write_bh.
1145 void bond_change_active_slave(struct bonding
*bond
, struct slave
*new_active
)
1147 struct slave
*old_active
= bond
->curr_active_slave
;
1149 if (old_active
== new_active
)
1153 new_active
->jiffies
= jiffies
;
1155 if (new_active
->link
== BOND_LINK_BACK
) {
1156 if (USES_PRIMARY(bond
->params
.mode
)) {
1157 pr_info("%s: making interface %s the new active one %d ms earlier.\n",
1158 bond
->dev
->name
, new_active
->dev
->name
,
1159 (bond
->params
.updelay
- new_active
->delay
) * bond
->params
.miimon
);
1162 new_active
->delay
= 0;
1163 new_active
->link
= BOND_LINK_UP
;
1165 if (bond
->params
.mode
== BOND_MODE_8023AD
)
1166 bond_3ad_handle_link_change(new_active
, BOND_LINK_UP
);
1168 if (bond_is_lb(bond
))
1169 bond_alb_handle_link_change(bond
, new_active
, BOND_LINK_UP
);
1171 if (USES_PRIMARY(bond
->params
.mode
)) {
1172 pr_info("%s: making interface %s the new active one.\n",
1173 bond
->dev
->name
, new_active
->dev
->name
);
1178 if (USES_PRIMARY(bond
->params
.mode
))
1179 bond_mc_swap(bond
, new_active
, old_active
);
1181 if (bond_is_lb(bond
)) {
1182 bond_alb_handle_active_change(bond
, new_active
);
1184 bond_set_slave_inactive_flags(old_active
);
1186 bond_set_slave_active_flags(new_active
);
1188 bond
->curr_active_slave
= new_active
;
1191 if (bond
->params
.mode
== BOND_MODE_ACTIVEBACKUP
) {
1193 bond_set_slave_inactive_flags(old_active
);
1196 bond_set_slave_active_flags(new_active
);
1198 if (bond
->params
.fail_over_mac
)
1199 bond_do_fail_over_mac(bond
, new_active
,
1202 bond
->send_grat_arp
= bond
->params
.num_grat_arp
;
1203 bond_send_gratuitous_arp(bond
);
1205 bond
->send_unsol_na
= bond
->params
.num_unsol_na
;
1206 bond_send_unsolicited_na(bond
);
1208 write_unlock_bh(&bond
->curr_slave_lock
);
1209 read_unlock(&bond
->lock
);
1211 netdev_bonding_change(bond
->dev
, NETDEV_BONDING_FAILOVER
);
1213 read_lock(&bond
->lock
);
1214 write_lock_bh(&bond
->curr_slave_lock
);
1218 /* resend IGMP joins since active slave has changed or
1219 * all were sent on curr_active_slave */
1220 if ((USES_PRIMARY(bond
->params
.mode
) && new_active
) ||
1221 bond
->params
.mode
== BOND_MODE_ROUNDROBIN
) {
1222 bond
->igmp_retrans
= bond
->params
.resend_igmp
;
1223 queue_delayed_work(bond
->wq
, &bond
->mcast_work
, 0);
1228 * bond_select_active_slave - select a new active slave, if needed
1229 * @bond: our bonding struct
1231 * This functions should be called when one of the following occurs:
1232 * - The old curr_active_slave has been released or lost its link.
1233 * - The primary_slave has got its link back.
1234 * - A slave has got its link back and there's no old curr_active_slave.
1236 * Caller must hold bond->lock for read and curr_slave_lock for write_bh.
1238 void bond_select_active_slave(struct bonding
*bond
)
1240 struct slave
*best_slave
;
1243 best_slave
= bond_find_best_slave(bond
);
1244 if (best_slave
!= bond
->curr_active_slave
) {
1245 bond_change_active_slave(bond
, best_slave
);
1246 rv
= bond_set_carrier(bond
);
1250 if (netif_carrier_ok(bond
->dev
)) {
1251 pr_info("%s: first active interface up!\n",
1254 pr_info("%s: now running without any active interface !\n",
1260 /*--------------------------- slave list handling ---------------------------*/
1263 * This function attaches the slave to the end of list.
1265 * bond->lock held for writing by caller.
1267 static void bond_attach_slave(struct bonding
*bond
, struct slave
*new_slave
)
1269 if (bond
->first_slave
== NULL
) { /* attaching the first slave */
1270 new_slave
->next
= new_slave
;
1271 new_slave
->prev
= new_slave
;
1272 bond
->first_slave
= new_slave
;
1274 new_slave
->next
= bond
->first_slave
;
1275 new_slave
->prev
= bond
->first_slave
->prev
;
1276 new_slave
->next
->prev
= new_slave
;
1277 new_slave
->prev
->next
= new_slave
;
1284 * This function detaches the slave from the list.
1285 * WARNING: no check is made to verify if the slave effectively
1286 * belongs to <bond>.
1287 * Nothing is freed on return, structures are just unchained.
1288 * If any slave pointer in bond was pointing to <slave>,
1289 * it should be changed by the calling function.
1291 * bond->lock held for writing by caller.
1293 static void bond_detach_slave(struct bonding
*bond
, struct slave
*slave
)
1296 slave
->next
->prev
= slave
->prev
;
1299 slave
->prev
->next
= slave
->next
;
1301 if (bond
->first_slave
== slave
) { /* slave is the first slave */
1302 if (bond
->slave_cnt
> 1) { /* there are more slave */
1303 bond
->first_slave
= slave
->next
;
1305 bond
->first_slave
= NULL
; /* slave was the last one */
1314 #ifdef CONFIG_NET_POLL_CONTROLLER
1316 * You must hold read lock on bond->lock before calling this.
1318 static bool slaves_support_netpoll(struct net_device
*bond_dev
)
1320 struct bonding
*bond
= netdev_priv(bond_dev
);
1321 struct slave
*slave
;
1325 bond_for_each_slave(bond
, slave
, i
) {
1326 if ((slave
->dev
->priv_flags
& IFF_DISABLE_NETPOLL
) ||
1327 !slave
->dev
->netdev_ops
->ndo_poll_controller
)
1330 return i
!= 0 && ret
;
1333 static void bond_poll_controller(struct net_device
*bond_dev
)
1335 struct net_device
*dev
= bond_dev
->npinfo
->netpoll
->real_dev
;
1336 if (dev
!= bond_dev
)
1337 netpoll_poll_dev(dev
);
1340 static void bond_netpoll_cleanup(struct net_device
*bond_dev
)
1342 struct bonding
*bond
= netdev_priv(bond_dev
);
1343 struct slave
*slave
;
1344 const struct net_device_ops
*ops
;
1347 read_lock(&bond
->lock
);
1348 bond_dev
->npinfo
= NULL
;
1349 bond_for_each_slave(bond
, slave
, i
) {
1351 ops
= slave
->dev
->netdev_ops
;
1352 if (ops
->ndo_netpoll_cleanup
)
1353 ops
->ndo_netpoll_cleanup(slave
->dev
);
1355 slave
->dev
->npinfo
= NULL
;
1358 read_unlock(&bond
->lock
);
1363 static void bond_netpoll_cleanup(struct net_device
*bond_dev
)
1369 /*---------------------------------- IOCTL ----------------------------------*/
1371 static int bond_sethwaddr(struct net_device
*bond_dev
,
1372 struct net_device
*slave_dev
)
1374 pr_debug("bond_dev=%p\n", bond_dev
);
1375 pr_debug("slave_dev=%p\n", slave_dev
);
1376 pr_debug("slave_dev->addr_len=%d\n", slave_dev
->addr_len
);
1377 memcpy(bond_dev
->dev_addr
, slave_dev
->dev_addr
, slave_dev
->addr_len
);
1381 #define BOND_VLAN_FEATURES \
1382 (NETIF_F_VLAN_CHALLENGED | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_TX | \
1383 NETIF_F_HW_VLAN_FILTER)
1386 * Compute the common dev->feature set available to all slaves. Some
1387 * feature bits are managed elsewhere, so preserve those feature bits
1388 * on the master device.
1390 static int bond_compute_features(struct bonding
*bond
)
1392 struct slave
*slave
;
1393 struct net_device
*bond_dev
= bond
->dev
;
1394 unsigned long features
= bond_dev
->features
;
1395 unsigned long vlan_features
= 0;
1396 unsigned short max_hard_header_len
= max((u16
)ETH_HLEN
,
1397 bond_dev
->hard_header_len
);
1400 features
&= ~(NETIF_F_ALL_CSUM
| BOND_VLAN_FEATURES
);
1401 features
|= NETIF_F_GSO_MASK
| NETIF_F_NO_CSUM
;
1403 if (!bond
->first_slave
)
1406 features
&= ~NETIF_F_ONE_FOR_ALL
;
1408 vlan_features
= bond
->first_slave
->dev
->vlan_features
;
1409 bond_for_each_slave(bond
, slave
, i
) {
1410 features
= netdev_increment_features(features
,
1411 slave
->dev
->features
,
1412 NETIF_F_ONE_FOR_ALL
);
1413 vlan_features
= netdev_increment_features(vlan_features
,
1414 slave
->dev
->vlan_features
,
1415 NETIF_F_ONE_FOR_ALL
);
1416 if (slave
->dev
->hard_header_len
> max_hard_header_len
)
1417 max_hard_header_len
= slave
->dev
->hard_header_len
;
1421 features
|= (bond_dev
->features
& BOND_VLAN_FEATURES
);
1422 bond_dev
->features
= netdev_fix_features(features
, NULL
);
1423 bond_dev
->vlan_features
= netdev_fix_features(vlan_features
, NULL
);
1424 bond_dev
->hard_header_len
= max_hard_header_len
;
1429 static void bond_setup_by_slave(struct net_device
*bond_dev
,
1430 struct net_device
*slave_dev
)
1432 struct bonding
*bond
= netdev_priv(bond_dev
);
1434 bond_dev
->header_ops
= slave_dev
->header_ops
;
1436 bond_dev
->type
= slave_dev
->type
;
1437 bond_dev
->hard_header_len
= slave_dev
->hard_header_len
;
1438 bond_dev
->addr_len
= slave_dev
->addr_len
;
1440 memcpy(bond_dev
->broadcast
, slave_dev
->broadcast
,
1441 slave_dev
->addr_len
);
1442 bond
->setup_by_slave
= 1;
1445 /* enslave device <slave> to bond device <master> */
1446 int bond_enslave(struct net_device
*bond_dev
, struct net_device
*slave_dev
)
1448 struct bonding
*bond
= netdev_priv(bond_dev
);
1449 const struct net_device_ops
*slave_ops
= slave_dev
->netdev_ops
;
1450 struct slave
*new_slave
= NULL
;
1451 struct netdev_hw_addr
*ha
;
1452 struct sockaddr addr
;
1454 int old_features
= bond_dev
->features
;
1457 if (!bond
->params
.use_carrier
&& slave_dev
->ethtool_ops
== NULL
&&
1458 slave_ops
->ndo_do_ioctl
== NULL
) {
1459 pr_warning("%s: Warning: no link monitoring support for %s\n",
1460 bond_dev
->name
, slave_dev
->name
);
1463 /* bond must be initialized by bond_open() before enslaving */
1464 if (!(bond_dev
->flags
& IFF_UP
)) {
1465 pr_warning("%s: master_dev is not up in bond_enslave\n",
1469 /* already enslaved */
1470 if (slave_dev
->flags
& IFF_SLAVE
) {
1471 pr_debug("Error, Device was already enslaved\n");
1475 /* vlan challenged mutual exclusion */
1476 /* no need to lock since we're protected by rtnl_lock */
1477 if (slave_dev
->features
& NETIF_F_VLAN_CHALLENGED
) {
1478 pr_debug("%s: NETIF_F_VLAN_CHALLENGED\n", slave_dev
->name
);
1480 pr_err("%s: Error: cannot enslave VLAN challenged slave %s on VLAN enabled bond %s\n",
1481 bond_dev
->name
, slave_dev
->name
, bond_dev
->name
);
1484 pr_warning("%s: Warning: enslaved VLAN challenged slave %s. Adding VLANs will be blocked as long as %s is part of bond %s\n",
1485 bond_dev
->name
, slave_dev
->name
,
1486 slave_dev
->name
, bond_dev
->name
);
1487 bond_dev
->features
|= NETIF_F_VLAN_CHALLENGED
;
1490 pr_debug("%s: ! NETIF_F_VLAN_CHALLENGED\n", slave_dev
->name
);
1491 if (bond
->slave_cnt
== 0) {
1492 /* First slave, and it is not VLAN challenged,
1493 * so remove the block of adding VLANs over the bond.
1495 bond_dev
->features
&= ~NETIF_F_VLAN_CHALLENGED
;
1500 * Old ifenslave binaries are no longer supported. These can
1501 * be identified with moderate accuracy by the state of the slave:
1502 * the current ifenslave will set the interface down prior to
1503 * enslaving it; the old ifenslave will not.
1505 if ((slave_dev
->flags
& IFF_UP
)) {
1506 pr_err("%s is up. This may be due to an out of date ifenslave.\n",
1509 goto err_undo_flags
;
1512 /* set bonding device ether type by slave - bonding netdevices are
1513 * created with ether_setup, so when the slave type is not ARPHRD_ETHER
1514 * there is a need to override some of the type dependent attribs/funcs.
1516 * bond ether type mutual exclusion - don't allow slaves of dissimilar
1517 * ether type (eg ARPHRD_ETHER and ARPHRD_INFINIBAND) share the same bond
1519 if (bond
->slave_cnt
== 0) {
1520 if (bond_dev
->type
!= slave_dev
->type
) {
1521 pr_debug("%s: change device type from %d to %d\n",
1523 bond_dev
->type
, slave_dev
->type
);
1525 res
= netdev_bonding_change(bond_dev
,
1526 NETDEV_PRE_TYPE_CHANGE
);
1527 res
= notifier_to_errno(res
);
1529 pr_err("%s: refused to change device type\n",
1532 goto err_undo_flags
;
1535 /* Flush unicast and multicast addresses */
1536 dev_uc_flush(bond_dev
);
1537 dev_mc_flush(bond_dev
);
1539 if (slave_dev
->type
!= ARPHRD_ETHER
)
1540 bond_setup_by_slave(bond_dev
, slave_dev
);
1542 ether_setup(bond_dev
);
1544 netdev_bonding_change(bond_dev
,
1545 NETDEV_POST_TYPE_CHANGE
);
1547 } else if (bond_dev
->type
!= slave_dev
->type
) {
1548 pr_err("%s ether type (%d) is different from other slaves (%d), can not enslave it.\n",
1550 slave_dev
->type
, bond_dev
->type
);
1552 goto err_undo_flags
;
1555 if (slave_ops
->ndo_set_mac_address
== NULL
) {
1556 if (bond
->slave_cnt
== 0) {
1557 pr_warning("%s: Warning: The first slave device specified does not support setting the MAC address. Setting fail_over_mac to active.",
1559 bond
->params
.fail_over_mac
= BOND_FOM_ACTIVE
;
1560 } else if (bond
->params
.fail_over_mac
!= BOND_FOM_ACTIVE
) {
1561 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",
1564 goto err_undo_flags
;
1568 /* If this is the first slave, then we need to set the master's hardware
1569 * address to be the same as the slave's. */
1570 if (bond
->slave_cnt
== 0)
1571 memcpy(bond
->dev
->dev_addr
, slave_dev
->dev_addr
,
1572 slave_dev
->addr_len
);
1575 new_slave
= kzalloc(sizeof(struct slave
), GFP_KERNEL
);
1578 goto err_undo_flags
;
1582 * Set the new_slave's queue_id to be zero. Queue ID mapping
1583 * is set via sysfs or module option if desired.
1585 new_slave
->queue_id
= 0;
1587 /* Save slave's original mtu and then set it to match the bond */
1588 new_slave
->original_mtu
= slave_dev
->mtu
;
1589 res
= dev_set_mtu(slave_dev
, bond
->dev
->mtu
);
1591 pr_debug("Error %d calling dev_set_mtu\n", res
);
1596 * Save slave's original ("permanent") mac address for modes
1597 * that need it, and for restoring it upon release, and then
1598 * set it to the master's address
1600 memcpy(new_slave
->perm_hwaddr
, slave_dev
->dev_addr
, ETH_ALEN
);
1602 if (!bond
->params
.fail_over_mac
) {
1604 * Set slave to master's mac address. The application already
1605 * set the master's mac address to that of the first slave
1607 memcpy(addr
.sa_data
, bond_dev
->dev_addr
, bond_dev
->addr_len
);
1608 addr
.sa_family
= slave_dev
->type
;
1609 res
= dev_set_mac_address(slave_dev
, &addr
);
1611 pr_debug("Error %d calling set_mac_address\n", res
);
1612 goto err_restore_mtu
;
1616 res
= netdev_set_master(slave_dev
, bond_dev
);
1618 pr_debug("Error %d calling netdev_set_master\n", res
);
1619 goto err_restore_mac
;
1621 /* open the slave since the application closed it */
1622 res
= dev_open(slave_dev
);
1624 pr_debug("Opening slave %s failed\n", slave_dev
->name
);
1625 goto err_unset_master
;
1628 new_slave
->dev
= slave_dev
;
1629 slave_dev
->priv_flags
|= IFF_BONDING
;
1631 if (bond_is_lb(bond
)) {
1632 /* bond_alb_init_slave() must be called before all other stages since
1633 * it might fail and we do not want to have to undo everything
1635 res
= bond_alb_init_slave(bond
, new_slave
);
1640 /* If the mode USES_PRIMARY, then the new slave gets the
1641 * master's promisc (and mc) settings only if it becomes the
1642 * curr_active_slave, and that is taken care of later when calling
1643 * bond_change_active()
1645 if (!USES_PRIMARY(bond
->params
.mode
)) {
1646 /* set promiscuity level to new slave */
1647 if (bond_dev
->flags
& IFF_PROMISC
) {
1648 res
= dev_set_promiscuity(slave_dev
, 1);
1653 /* set allmulti level to new slave */
1654 if (bond_dev
->flags
& IFF_ALLMULTI
) {
1655 res
= dev_set_allmulti(slave_dev
, 1);
1660 netif_addr_lock_bh(bond_dev
);
1661 /* upload master's mc_list to new slave */
1662 netdev_for_each_mc_addr(ha
, bond_dev
)
1663 dev_mc_add(slave_dev
, ha
->addr
);
1664 netif_addr_unlock_bh(bond_dev
);
1667 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
1668 /* add lacpdu mc addr to mc list */
1669 u8 lacpdu_multicast
[ETH_ALEN
] = MULTICAST_LACPDU_ADDR
;
1671 dev_mc_add(slave_dev
, lacpdu_multicast
);
1674 bond_add_vlans_on_slave(bond
, slave_dev
);
1676 write_lock_bh(&bond
->lock
);
1678 bond_attach_slave(bond
, new_slave
);
1680 new_slave
->delay
= 0;
1681 new_slave
->link_failure_count
= 0;
1683 bond_compute_features(bond
);
1685 write_unlock_bh(&bond
->lock
);
1687 read_lock(&bond
->lock
);
1689 new_slave
->last_arp_rx
= jiffies
;
1691 if (bond
->params
.miimon
&& !bond
->params
.use_carrier
) {
1692 link_reporting
= bond_check_dev_link(bond
, slave_dev
, 1);
1694 if ((link_reporting
== -1) && !bond
->params
.arp_interval
) {
1696 * miimon is set but a bonded network driver
1697 * does not support ETHTOOL/MII and
1698 * arp_interval is not set. Note: if
1699 * use_carrier is enabled, we will never go
1700 * here (because netif_carrier is always
1701 * supported); thus, we don't need to change
1702 * the messages for netif_carrier.
1704 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",
1705 bond_dev
->name
, slave_dev
->name
);
1706 } else if (link_reporting
== -1) {
1707 /* unable get link status using mii/ethtool */
1708 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",
1709 bond_dev
->name
, slave_dev
->name
);
1713 /* check for initial state */
1714 if (!bond
->params
.miimon
||
1715 (bond_check_dev_link(bond
, slave_dev
, 0) == BMSR_LSTATUS
)) {
1716 if (bond
->params
.updelay
) {
1717 pr_debug("Initial state of slave_dev is BOND_LINK_BACK\n");
1718 new_slave
->link
= BOND_LINK_BACK
;
1719 new_slave
->delay
= bond
->params
.updelay
;
1721 pr_debug("Initial state of slave_dev is BOND_LINK_UP\n");
1722 new_slave
->link
= BOND_LINK_UP
;
1724 new_slave
->jiffies
= jiffies
;
1726 pr_debug("Initial state of slave_dev is BOND_LINK_DOWN\n");
1727 new_slave
->link
= BOND_LINK_DOWN
;
1730 if (bond_update_speed_duplex(new_slave
) &&
1731 (new_slave
->link
!= BOND_LINK_DOWN
)) {
1732 pr_warning("%s: Warning: failed to get speed and duplex from %s, assumed to be 100Mb/sec and Full.\n",
1733 bond_dev
->name
, new_slave
->dev
->name
);
1735 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
1736 pr_warning("%s: Warning: Operation of 802.3ad mode requires ETHTOOL support in base driver for proper aggregator selection.\n",
1741 if (USES_PRIMARY(bond
->params
.mode
) && bond
->params
.primary
[0]) {
1742 /* if there is a primary slave, remember it */
1743 if (strcmp(bond
->params
.primary
, new_slave
->dev
->name
) == 0) {
1744 bond
->primary_slave
= new_slave
;
1745 bond
->force_primary
= true;
1749 write_lock_bh(&bond
->curr_slave_lock
);
1751 switch (bond
->params
.mode
) {
1752 case BOND_MODE_ACTIVEBACKUP
:
1753 bond_set_slave_inactive_flags(new_slave
);
1754 bond_select_active_slave(bond
);
1756 case BOND_MODE_8023AD
:
1757 /* in 802.3ad mode, the internal mechanism
1758 * will activate the slaves in the selected
1761 bond_set_slave_inactive_flags(new_slave
);
1762 /* if this is the first slave */
1763 if (bond
->slave_cnt
== 1) {
1764 SLAVE_AD_INFO(new_slave
).id
= 1;
1765 /* Initialize AD with the number of times that the AD timer is called in 1 second
1766 * can be called only after the mac address of the bond is set
1768 bond_3ad_initialize(bond
, 1000/AD_TIMER_INTERVAL
,
1769 bond
->params
.lacp_fast
);
1771 SLAVE_AD_INFO(new_slave
).id
=
1772 SLAVE_AD_INFO(new_slave
->prev
).id
+ 1;
1775 bond_3ad_bind_slave(new_slave
);
1779 new_slave
->state
= BOND_STATE_ACTIVE
;
1780 bond_set_slave_inactive_flags(new_slave
);
1781 bond_select_active_slave(bond
);
1784 pr_debug("This slave is always active in trunk mode\n");
1786 /* always active in trunk mode */
1787 new_slave
->state
= BOND_STATE_ACTIVE
;
1789 /* In trunking mode there is little meaning to curr_active_slave
1790 * anyway (it holds no special properties of the bond device),
1791 * so we can change it without calling change_active_interface()
1793 if (!bond
->curr_active_slave
)
1794 bond
->curr_active_slave
= new_slave
;
1797 } /* switch(bond_mode) */
1799 write_unlock_bh(&bond
->curr_slave_lock
);
1801 bond_set_carrier(bond
);
1803 #ifdef CONFIG_NET_POLL_CONTROLLER
1805 * Netpoll and bonding is broken, make sure it is not initialized
1806 * until it is fixed.
1808 if (disable_netpoll
) {
1809 bond_dev
->priv_flags
|= IFF_DISABLE_NETPOLL
;
1811 if (slaves_support_netpoll(bond_dev
)) {
1812 bond_dev
->priv_flags
&= ~IFF_DISABLE_NETPOLL
;
1813 if (bond_dev
->npinfo
)
1814 slave_dev
->npinfo
= bond_dev
->npinfo
;
1815 } else if (!(bond_dev
->priv_flags
& IFF_DISABLE_NETPOLL
)) {
1816 bond_dev
->priv_flags
|= IFF_DISABLE_NETPOLL
;
1817 pr_info("New slave device %s does not support netpoll\n",
1819 pr_info("Disabling netpoll support for %s\n", bond_dev
->name
);
1823 read_unlock(&bond
->lock
);
1825 res
= bond_create_slave_symlinks(bond_dev
, slave_dev
);
1829 pr_info("%s: enslaving %s as a%s interface with a%s link.\n",
1830 bond_dev
->name
, slave_dev
->name
,
1831 new_slave
->state
== BOND_STATE_ACTIVE
? "n active" : " backup",
1832 new_slave
->link
!= BOND_LINK_DOWN
? "n up" : " down");
1834 /* enslave is successful */
1837 /* Undo stages on error */
1839 dev_close(slave_dev
);
1842 netdev_set_master(slave_dev
, NULL
);
1845 if (!bond
->params
.fail_over_mac
) {
1846 /* XXX TODO - fom follow mode needs to change master's
1847 * MAC if this slave's MAC is in use by the bond, or at
1848 * least print a warning.
1850 memcpy(addr
.sa_data
, new_slave
->perm_hwaddr
, ETH_ALEN
);
1851 addr
.sa_family
= slave_dev
->type
;
1852 dev_set_mac_address(slave_dev
, &addr
);
1856 dev_set_mtu(slave_dev
, new_slave
->original_mtu
);
1862 bond_dev
->features
= old_features
;
1868 * Try to release the slave device <slave> from the bond device <master>
1869 * It is legal to access curr_active_slave without a lock because all the function
1872 * The rules for slave state should be:
1873 * for Active/Backup:
1874 * Active stays on all backups go down
1875 * for Bonded connections:
1876 * The first up interface should be left on and all others downed.
1878 int bond_release(struct net_device
*bond_dev
, struct net_device
*slave_dev
)
1880 struct bonding
*bond
= netdev_priv(bond_dev
);
1881 struct slave
*slave
, *oldcurrent
;
1882 struct sockaddr addr
;
1884 /* slave is not a slave or master is not master of this slave */
1885 if (!(slave_dev
->flags
& IFF_SLAVE
) ||
1886 (slave_dev
->master
!= bond_dev
)) {
1887 pr_err("%s: Error: cannot release %s.\n",
1888 bond_dev
->name
, slave_dev
->name
);
1892 netdev_bonding_change(bond_dev
, NETDEV_BONDING_DESLAVE
);
1893 write_lock_bh(&bond
->lock
);
1895 slave
= bond_get_slave_by_dev(bond
, slave_dev
);
1897 /* not a slave of this bond */
1898 pr_info("%s: %s not enslaved\n",
1899 bond_dev
->name
, slave_dev
->name
);
1900 write_unlock_bh(&bond
->lock
);
1904 if (!bond
->params
.fail_over_mac
) {
1905 if (!compare_ether_addr(bond_dev
->dev_addr
, slave
->perm_hwaddr
) &&
1906 bond
->slave_cnt
> 1)
1907 pr_warning("%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",
1908 bond_dev
->name
, slave_dev
->name
,
1910 bond_dev
->name
, slave_dev
->name
);
1913 /* Inform AD package of unbinding of slave. */
1914 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
1915 /* must be called before the slave is
1916 * detached from the list
1918 bond_3ad_unbind_slave(slave
);
1921 pr_info("%s: releasing %s interface %s\n",
1923 (slave
->state
== BOND_STATE_ACTIVE
) ? "active" : "backup",
1926 oldcurrent
= bond
->curr_active_slave
;
1928 bond
->current_arp_slave
= NULL
;
1930 /* release the slave from its bond */
1931 bond_detach_slave(bond
, slave
);
1933 bond_compute_features(bond
);
1935 if (bond
->primary_slave
== slave
)
1936 bond
->primary_slave
= NULL
;
1938 if (oldcurrent
== slave
)
1939 bond_change_active_slave(bond
, NULL
);
1941 if (bond_is_lb(bond
)) {
1942 /* Must be called only after the slave has been
1943 * detached from the list and the curr_active_slave
1944 * has been cleared (if our_slave == old_current),
1945 * but before a new active slave is selected.
1947 write_unlock_bh(&bond
->lock
);
1948 bond_alb_deinit_slave(bond
, slave
);
1949 write_lock_bh(&bond
->lock
);
1952 if (oldcurrent
== slave
) {
1954 * Note that we hold RTNL over this sequence, so there
1955 * is no concern that another slave add/remove event
1958 write_unlock_bh(&bond
->lock
);
1959 read_lock(&bond
->lock
);
1960 write_lock_bh(&bond
->curr_slave_lock
);
1962 bond_select_active_slave(bond
);
1964 write_unlock_bh(&bond
->curr_slave_lock
);
1965 read_unlock(&bond
->lock
);
1966 write_lock_bh(&bond
->lock
);
1969 if (bond
->slave_cnt
== 0) {
1970 bond_set_carrier(bond
);
1972 /* if the last slave was removed, zero the mac address
1973 * of the master so it will be set by the application
1974 * to the mac address of the first slave
1976 memset(bond_dev
->dev_addr
, 0, bond_dev
->addr_len
);
1979 bond_dev
->features
|= NETIF_F_VLAN_CHALLENGED
;
1981 pr_warning("%s: Warning: clearing HW address of %s while it still has VLANs.\n",
1982 bond_dev
->name
, bond_dev
->name
);
1983 pr_warning("%s: When re-adding slaves, make sure the bond's HW address matches its VLANs'.\n",
1986 } else if ((bond_dev
->features
& NETIF_F_VLAN_CHALLENGED
) &&
1987 !bond_has_challenged_slaves(bond
)) {
1988 pr_info("%s: last VLAN challenged slave %s left bond %s. VLAN blocking is removed\n",
1989 bond_dev
->name
, slave_dev
->name
, bond_dev
->name
);
1990 bond_dev
->features
&= ~NETIF_F_VLAN_CHALLENGED
;
1993 write_unlock_bh(&bond
->lock
);
1995 /* must do this from outside any spinlocks */
1996 bond_destroy_slave_symlinks(bond_dev
, slave_dev
);
1998 bond_del_vlans_from_slave(bond
, slave_dev
);
2000 /* If the mode USES_PRIMARY, then we should only remove its
2001 * promisc and mc settings if it was the curr_active_slave, but that was
2002 * already taken care of above when we detached the slave
2004 if (!USES_PRIMARY(bond
->params
.mode
)) {
2005 /* unset promiscuity level from slave */
2006 if (bond_dev
->flags
& IFF_PROMISC
)
2007 dev_set_promiscuity(slave_dev
, -1);
2009 /* unset allmulti level from slave */
2010 if (bond_dev
->flags
& IFF_ALLMULTI
)
2011 dev_set_allmulti(slave_dev
, -1);
2013 /* flush master's mc_list from slave */
2014 netif_addr_lock_bh(bond_dev
);
2015 bond_mc_list_flush(bond_dev
, slave_dev
);
2016 netif_addr_unlock_bh(bond_dev
);
2019 netdev_set_master(slave_dev
, NULL
);
2021 #ifdef CONFIG_NET_POLL_CONTROLLER
2022 read_lock_bh(&bond
->lock
);
2024 /* Make sure netpoll over stays disabled until fixed. */
2025 if (!disable_netpoll
)
2026 if (slaves_support_netpoll(bond_dev
))
2027 bond_dev
->priv_flags
&= ~IFF_DISABLE_NETPOLL
;
2028 read_unlock_bh(&bond
->lock
);
2029 if (slave_dev
->netdev_ops
->ndo_netpoll_cleanup
)
2030 slave_dev
->netdev_ops
->ndo_netpoll_cleanup(slave_dev
);
2032 slave_dev
->npinfo
= NULL
;
2035 /* close slave before restoring its mac address */
2036 dev_close(slave_dev
);
2038 if (bond
->params
.fail_over_mac
!= BOND_FOM_ACTIVE
) {
2039 /* restore original ("permanent") mac address */
2040 memcpy(addr
.sa_data
, slave
->perm_hwaddr
, ETH_ALEN
);
2041 addr
.sa_family
= slave_dev
->type
;
2042 dev_set_mac_address(slave_dev
, &addr
);
2045 dev_set_mtu(slave_dev
, slave
->original_mtu
);
2047 slave_dev
->priv_flags
&= ~(IFF_MASTER_8023AD
| IFF_MASTER_ALB
|
2048 IFF_SLAVE_INACTIVE
| IFF_BONDING
|
2053 return 0; /* deletion OK */
2057 * First release a slave and than destroy the bond if no more slaves are left.
2058 * Must be under rtnl_lock when this function is called.
2060 int bond_release_and_destroy(struct net_device
*bond_dev
,
2061 struct net_device
*slave_dev
)
2063 struct bonding
*bond
= netdev_priv(bond_dev
);
2066 ret
= bond_release(bond_dev
, slave_dev
);
2067 if ((ret
== 0) && (bond
->slave_cnt
== 0)) {
2068 pr_info("%s: destroying bond %s.\n",
2069 bond_dev
->name
, bond_dev
->name
);
2070 unregister_netdevice(bond_dev
);
2076 * This function releases all slaves.
2078 static int bond_release_all(struct net_device
*bond_dev
)
2080 struct bonding
*bond
= netdev_priv(bond_dev
);
2081 struct slave
*slave
;
2082 struct net_device
*slave_dev
;
2083 struct sockaddr addr
;
2085 write_lock_bh(&bond
->lock
);
2087 netif_carrier_off(bond_dev
);
2089 if (bond
->slave_cnt
== 0)
2092 bond
->current_arp_slave
= NULL
;
2093 bond
->primary_slave
= NULL
;
2094 bond_change_active_slave(bond
, NULL
);
2096 while ((slave
= bond
->first_slave
) != NULL
) {
2097 /* Inform AD package of unbinding of slave
2098 * before slave is detached from the list.
2100 if (bond
->params
.mode
== BOND_MODE_8023AD
)
2101 bond_3ad_unbind_slave(slave
);
2103 slave_dev
= slave
->dev
;
2104 bond_detach_slave(bond
, slave
);
2106 /* now that the slave is detached, unlock and perform
2107 * all the undo steps that should not be called from
2110 write_unlock_bh(&bond
->lock
);
2112 if (bond_is_lb(bond
)) {
2113 /* must be called only after the slave
2114 * has been detached from the list
2116 bond_alb_deinit_slave(bond
, slave
);
2119 bond_compute_features(bond
);
2121 bond_destroy_slave_symlinks(bond_dev
, slave_dev
);
2122 bond_del_vlans_from_slave(bond
, slave_dev
);
2124 /* If the mode USES_PRIMARY, then we should only remove its
2125 * promisc and mc settings if it was the curr_active_slave, but that was
2126 * already taken care of above when we detached the slave
2128 if (!USES_PRIMARY(bond
->params
.mode
)) {
2129 /* unset promiscuity level from slave */
2130 if (bond_dev
->flags
& IFF_PROMISC
)
2131 dev_set_promiscuity(slave_dev
, -1);
2133 /* unset allmulti level from slave */
2134 if (bond_dev
->flags
& IFF_ALLMULTI
)
2135 dev_set_allmulti(slave_dev
, -1);
2137 /* flush master's mc_list from slave */
2138 netif_addr_lock_bh(bond_dev
);
2139 bond_mc_list_flush(bond_dev
, slave_dev
);
2140 netif_addr_unlock_bh(bond_dev
);
2143 netdev_set_master(slave_dev
, NULL
);
2145 /* close slave before restoring its mac address */
2146 dev_close(slave_dev
);
2148 if (!bond
->params
.fail_over_mac
) {
2149 /* restore original ("permanent") mac address*/
2150 memcpy(addr
.sa_data
, slave
->perm_hwaddr
, ETH_ALEN
);
2151 addr
.sa_family
= slave_dev
->type
;
2152 dev_set_mac_address(slave_dev
, &addr
);
2155 slave_dev
->priv_flags
&= ~(IFF_MASTER_8023AD
| IFF_MASTER_ALB
|
2156 IFF_SLAVE_INACTIVE
);
2160 /* re-acquire the lock before getting the next slave */
2161 write_lock_bh(&bond
->lock
);
2164 /* zero the mac address of the master so it will be
2165 * set by the application to the mac address of the
2168 memset(bond_dev
->dev_addr
, 0, bond_dev
->addr_len
);
2171 bond_dev
->features
|= NETIF_F_VLAN_CHALLENGED
;
2173 pr_warning("%s: Warning: clearing HW address of %s while it still has VLANs.\n",
2174 bond_dev
->name
, bond_dev
->name
);
2175 pr_warning("%s: When re-adding slaves, make sure the bond's HW address matches its VLANs'.\n",
2179 pr_info("%s: released all slaves\n", bond_dev
->name
);
2182 write_unlock_bh(&bond
->lock
);
2188 * This function changes the active slave to slave <slave_dev>.
2189 * It returns -EINVAL in the following cases.
2190 * - <slave_dev> is not found in the list.
2191 * - There is not active slave now.
2192 * - <slave_dev> is already active.
2193 * - The link state of <slave_dev> is not BOND_LINK_UP.
2194 * - <slave_dev> is not running.
2195 * In these cases, this function does nothing.
2196 * In the other cases, current_slave pointer is changed and 0 is returned.
2198 static int bond_ioctl_change_active(struct net_device
*bond_dev
, struct net_device
*slave_dev
)
2200 struct bonding
*bond
= netdev_priv(bond_dev
);
2201 struct slave
*old_active
= NULL
;
2202 struct slave
*new_active
= NULL
;
2205 if (!USES_PRIMARY(bond
->params
.mode
))
2208 /* Verify that master_dev is indeed the master of slave_dev */
2209 if (!(slave_dev
->flags
& IFF_SLAVE
) || (slave_dev
->master
!= bond_dev
))
2212 read_lock(&bond
->lock
);
2214 read_lock(&bond
->curr_slave_lock
);
2215 old_active
= bond
->curr_active_slave
;
2216 read_unlock(&bond
->curr_slave_lock
);
2218 new_active
= bond_get_slave_by_dev(bond
, slave_dev
);
2221 * Changing to the current active: do nothing; return success.
2223 if (new_active
&& (new_active
== old_active
)) {
2224 read_unlock(&bond
->lock
);
2230 (new_active
->link
== BOND_LINK_UP
) &&
2231 IS_UP(new_active
->dev
)) {
2232 write_lock_bh(&bond
->curr_slave_lock
);
2233 bond_change_active_slave(bond
, new_active
);
2234 write_unlock_bh(&bond
->curr_slave_lock
);
2238 read_unlock(&bond
->lock
);
2243 static int bond_info_query(struct net_device
*bond_dev
, struct ifbond
*info
)
2245 struct bonding
*bond
= netdev_priv(bond_dev
);
2247 info
->bond_mode
= bond
->params
.mode
;
2248 info
->miimon
= bond
->params
.miimon
;
2250 read_lock(&bond
->lock
);
2251 info
->num_slaves
= bond
->slave_cnt
;
2252 read_unlock(&bond
->lock
);
2257 static int bond_slave_info_query(struct net_device
*bond_dev
, struct ifslave
*info
)
2259 struct bonding
*bond
= netdev_priv(bond_dev
);
2260 struct slave
*slave
;
2261 int i
, res
= -ENODEV
;
2263 read_lock(&bond
->lock
);
2265 bond_for_each_slave(bond
, slave
, i
) {
2266 if (i
== (int)info
->slave_id
) {
2268 strcpy(info
->slave_name
, slave
->dev
->name
);
2269 info
->link
= slave
->link
;
2270 info
->state
= slave
->state
;
2271 info
->link_failure_count
= slave
->link_failure_count
;
2276 read_unlock(&bond
->lock
);
2281 /*-------------------------------- Monitoring -------------------------------*/
2284 static int bond_miimon_inspect(struct bonding
*bond
)
2286 struct slave
*slave
;
2287 int i
, link_state
, commit
= 0;
2288 bool ignore_updelay
;
2290 ignore_updelay
= !bond
->curr_active_slave
? true : false;
2292 bond_for_each_slave(bond
, slave
, i
) {
2293 slave
->new_link
= BOND_LINK_NOCHANGE
;
2295 link_state
= bond_check_dev_link(bond
, slave
->dev
, 0);
2297 switch (slave
->link
) {
2302 slave
->link
= BOND_LINK_FAIL
;
2303 slave
->delay
= bond
->params
.downdelay
;
2305 pr_info("%s: link status down for %sinterface %s, disabling it in %d ms.\n",
2307 (bond
->params
.mode
==
2308 BOND_MODE_ACTIVEBACKUP
) ?
2309 ((slave
->state
== BOND_STATE_ACTIVE
) ?
2310 "active " : "backup ") : "",
2312 bond
->params
.downdelay
* bond
->params
.miimon
);
2315 case BOND_LINK_FAIL
:
2318 * recovered before downdelay expired
2320 slave
->link
= BOND_LINK_UP
;
2321 slave
->jiffies
= jiffies
;
2322 pr_info("%s: link status up again after %d ms for interface %s.\n",
2324 (bond
->params
.downdelay
- slave
->delay
) *
2325 bond
->params
.miimon
,
2330 if (slave
->delay
<= 0) {
2331 slave
->new_link
= BOND_LINK_DOWN
;
2339 case BOND_LINK_DOWN
:
2343 slave
->link
= BOND_LINK_BACK
;
2344 slave
->delay
= bond
->params
.updelay
;
2347 pr_info("%s: link status up for interface %s, enabling it in %d ms.\n",
2348 bond
->dev
->name
, slave
->dev
->name
,
2349 ignore_updelay
? 0 :
2350 bond
->params
.updelay
*
2351 bond
->params
.miimon
);
2354 case BOND_LINK_BACK
:
2356 slave
->link
= BOND_LINK_DOWN
;
2357 pr_info("%s: link status down again after %d ms for interface %s.\n",
2359 (bond
->params
.updelay
- slave
->delay
) *
2360 bond
->params
.miimon
,
2369 if (slave
->delay
<= 0) {
2370 slave
->new_link
= BOND_LINK_UP
;
2372 ignore_updelay
= false;
2384 static void bond_miimon_commit(struct bonding
*bond
)
2386 struct slave
*slave
;
2389 bond_for_each_slave(bond
, slave
, i
) {
2390 switch (slave
->new_link
) {
2391 case BOND_LINK_NOCHANGE
:
2395 slave
->link
= BOND_LINK_UP
;
2396 slave
->jiffies
= jiffies
;
2398 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
2399 /* prevent it from being the active one */
2400 slave
->state
= BOND_STATE_BACKUP
;
2401 } else if (bond
->params
.mode
!= BOND_MODE_ACTIVEBACKUP
) {
2402 /* make it immediately active */
2403 slave
->state
= BOND_STATE_ACTIVE
;
2404 } else if (slave
!= bond
->primary_slave
) {
2405 /* prevent it from being the active one */
2406 slave
->state
= BOND_STATE_BACKUP
;
2409 pr_info("%s: link status definitely up for interface %s, %d Mbps %s duplex.\n",
2410 bond
->dev
->name
, slave
->dev
->name
,
2411 slave
->speed
, slave
->duplex
? "full" : "half");
2413 /* notify ad that the link status has changed */
2414 if (bond
->params
.mode
== BOND_MODE_8023AD
)
2415 bond_3ad_handle_link_change(slave
, BOND_LINK_UP
);
2417 if (bond_is_lb(bond
))
2418 bond_alb_handle_link_change(bond
, slave
,
2421 if (!bond
->curr_active_slave
||
2422 (slave
== bond
->primary_slave
))
2427 case BOND_LINK_DOWN
:
2428 if (slave
->link_failure_count
< UINT_MAX
)
2429 slave
->link_failure_count
++;
2431 slave
->link
= BOND_LINK_DOWN
;
2433 if (bond
->params
.mode
== BOND_MODE_ACTIVEBACKUP
||
2434 bond
->params
.mode
== BOND_MODE_8023AD
)
2435 bond_set_slave_inactive_flags(slave
);
2437 pr_info("%s: link status definitely down for interface %s, disabling it\n",
2438 bond
->dev
->name
, slave
->dev
->name
);
2440 if (bond
->params
.mode
== BOND_MODE_8023AD
)
2441 bond_3ad_handle_link_change(slave
,
2444 if (bond_is_lb(bond
))
2445 bond_alb_handle_link_change(bond
, slave
,
2448 if (slave
== bond
->curr_active_slave
)
2454 pr_err("%s: invalid new link %d on slave %s\n",
2455 bond
->dev
->name
, slave
->new_link
,
2457 slave
->new_link
= BOND_LINK_NOCHANGE
;
2464 write_lock_bh(&bond
->curr_slave_lock
);
2465 bond_select_active_slave(bond
);
2466 write_unlock_bh(&bond
->curr_slave_lock
);
2469 bond_set_carrier(bond
);
2475 * Really a wrapper that splits the mii monitor into two phases: an
2476 * inspection, then (if inspection indicates something needs to be done)
2477 * an acquisition of appropriate locks followed by a commit phase to
2478 * implement whatever link state changes are indicated.
2480 void bond_mii_monitor(struct work_struct
*work
)
2482 struct bonding
*bond
= container_of(work
, struct bonding
,
2485 read_lock(&bond
->lock
);
2486 if (bond
->kill_timers
)
2489 if (bond
->slave_cnt
== 0)
2492 if (bond
->send_grat_arp
) {
2493 read_lock(&bond
->curr_slave_lock
);
2494 bond_send_gratuitous_arp(bond
);
2495 read_unlock(&bond
->curr_slave_lock
);
2498 if (bond
->send_unsol_na
) {
2499 read_lock(&bond
->curr_slave_lock
);
2500 bond_send_unsolicited_na(bond
);
2501 read_unlock(&bond
->curr_slave_lock
);
2504 if (bond_miimon_inspect(bond
)) {
2505 read_unlock(&bond
->lock
);
2507 read_lock(&bond
->lock
);
2509 bond_miimon_commit(bond
);
2511 read_unlock(&bond
->lock
);
2512 rtnl_unlock(); /* might sleep, hold no other locks */
2513 read_lock(&bond
->lock
);
2517 if (bond
->params
.miimon
)
2518 queue_delayed_work(bond
->wq
, &bond
->mii_work
,
2519 msecs_to_jiffies(bond
->params
.miimon
));
2521 read_unlock(&bond
->lock
);
2524 static __be32
bond_glean_dev_ip(struct net_device
*dev
)
2526 struct in_device
*idev
;
2527 struct in_ifaddr
*ifa
;
2534 idev
= __in_dev_get_rcu(dev
);
2538 ifa
= idev
->ifa_list
;
2542 addr
= ifa
->ifa_local
;
2548 static int bond_has_this_ip(struct bonding
*bond
, __be32 ip
)
2550 struct vlan_entry
*vlan
;
2552 if (ip
== bond
->master_ip
)
2555 list_for_each_entry(vlan
, &bond
->vlan_list
, vlan_list
) {
2556 if (ip
== vlan
->vlan_ip
)
2564 * We go to the (large) trouble of VLAN tagging ARP frames because
2565 * switches in VLAN mode (especially if ports are configured as
2566 * "native" to a VLAN) might not pass non-tagged frames.
2568 static void bond_arp_send(struct net_device
*slave_dev
, int arp_op
, __be32 dest_ip
, __be32 src_ip
, unsigned short vlan_id
)
2570 struct sk_buff
*skb
;
2572 pr_debug("arp %d on slave %s: dst %x src %x vid %d\n", arp_op
,
2573 slave_dev
->name
, dest_ip
, src_ip
, vlan_id
);
2575 skb
= arp_create(arp_op
, ETH_P_ARP
, dest_ip
, slave_dev
, src_ip
,
2576 NULL
, slave_dev
->dev_addr
, NULL
);
2579 pr_err("ARP packet allocation failed\n");
2583 skb
= vlan_put_tag(skb
, vlan_id
);
2585 pr_err("failed to insert VLAN tag\n");
2593 static void bond_arp_send_all(struct bonding
*bond
, struct slave
*slave
)
2596 __be32
*targets
= bond
->params
.arp_targets
;
2597 struct vlan_entry
*vlan
;
2598 struct net_device
*vlan_dev
;
2602 for (i
= 0; (i
< BOND_MAX_ARP_TARGETS
); i
++) {
2605 pr_debug("basa: target %x\n", targets
[i
]);
2607 pr_debug("basa: empty vlan: arp_send\n");
2608 bond_arp_send(slave
->dev
, ARPOP_REQUEST
, targets
[i
],
2609 bond
->master_ip
, 0);
2614 * If VLANs are configured, we do a route lookup to
2615 * determine which VLAN interface would be used, so we
2616 * can tag the ARP with the proper VLAN tag.
2618 memset(&fl
, 0, sizeof(fl
));
2619 fl
.fl4_dst
= targets
[i
];
2620 fl
.fl4_tos
= RTO_ONLINK
;
2622 rv
= ip_route_output_key(dev_net(bond
->dev
), &rt
, &fl
);
2624 if (net_ratelimit()) {
2625 pr_warning("%s: no route to arp_ip_target %pI4\n",
2626 bond
->dev
->name
, &fl
.fl4_dst
);
2632 * This target is not on a VLAN
2634 if (rt
->dst
.dev
== bond
->dev
) {
2636 pr_debug("basa: rtdev == bond->dev: arp_send\n");
2637 bond_arp_send(slave
->dev
, ARPOP_REQUEST
, targets
[i
],
2638 bond
->master_ip
, 0);
2643 list_for_each_entry(vlan
, &bond
->vlan_list
, vlan_list
) {
2644 vlan_dev
= vlan_group_get_device(bond
->vlgrp
, vlan
->vlan_id
);
2645 if (vlan_dev
== rt
->dst
.dev
) {
2646 vlan_id
= vlan
->vlan_id
;
2647 pr_debug("basa: vlan match on %s %d\n",
2648 vlan_dev
->name
, vlan_id
);
2655 bond_arp_send(slave
->dev
, ARPOP_REQUEST
, targets
[i
],
2656 vlan
->vlan_ip
, vlan_id
);
2660 if (net_ratelimit()) {
2661 pr_warning("%s: no path to arp_ip_target %pI4 via rt.dev %s\n",
2662 bond
->dev
->name
, &fl
.fl4_dst
,
2663 rt
->dst
.dev
? rt
->dst
.dev
->name
: "NULL");
2670 * Kick out a gratuitous ARP for an IP on the bonding master plus one
2671 * for each VLAN above us.
2673 * Caller must hold curr_slave_lock for read or better
2675 static void bond_send_gratuitous_arp(struct bonding
*bond
)
2677 struct slave
*slave
= bond
->curr_active_slave
;
2678 struct vlan_entry
*vlan
;
2679 struct net_device
*vlan_dev
;
2681 pr_debug("bond_send_grat_arp: bond %s slave %s\n",
2682 bond
->dev
->name
, slave
? slave
->dev
->name
: "NULL");
2684 if (!slave
|| !bond
->send_grat_arp
||
2685 test_bit(__LINK_STATE_LINKWATCH_PENDING
, &slave
->dev
->state
))
2688 bond
->send_grat_arp
--;
2690 if (bond
->master_ip
) {
2691 bond_arp_send(slave
->dev
, ARPOP_REPLY
, bond
->master_ip
,
2692 bond
->master_ip
, 0);
2698 list_for_each_entry(vlan
, &bond
->vlan_list
, vlan_list
) {
2699 vlan_dev
= vlan_group_get_device(bond
->vlgrp
, vlan
->vlan_id
);
2700 if (vlan
->vlan_ip
) {
2701 bond_arp_send(slave
->dev
, ARPOP_REPLY
, vlan
->vlan_ip
,
2702 vlan
->vlan_ip
, vlan
->vlan_id
);
2707 static void bond_validate_arp(struct bonding
*bond
, struct slave
*slave
, __be32 sip
, __be32 tip
)
2710 __be32
*targets
= bond
->params
.arp_targets
;
2712 for (i
= 0; (i
< BOND_MAX_ARP_TARGETS
) && targets
[i
]; i
++) {
2713 pr_debug("bva: sip %pI4 tip %pI4 t[%d] %pI4 bhti(tip) %d\n",
2714 &sip
, &tip
, i
, &targets
[i
],
2715 bond_has_this_ip(bond
, tip
));
2716 if (sip
== targets
[i
]) {
2717 if (bond_has_this_ip(bond
, tip
))
2718 slave
->last_arp_rx
= jiffies
;
2724 static int bond_arp_rcv(struct sk_buff
*skb
, struct net_device
*dev
, struct packet_type
*pt
, struct net_device
*orig_dev
)
2727 struct slave
*slave
;
2728 struct bonding
*bond
;
2729 unsigned char *arp_ptr
;
2732 if (dev
->priv_flags
& IFF_802_1Q_VLAN
) {
2734 * When using VLANS and bonding, dev and oriv_dev may be
2735 * incorrect if the physical interface supports VLAN
2736 * acceleration. With this change ARP validation now
2737 * works for hosts only reachable on the VLAN interface.
2739 dev
= vlan_dev_real_dev(dev
);
2740 orig_dev
= dev_get_by_index_rcu(dev_net(skb
->dev
),skb
->skb_iif
);
2743 if (!(dev
->priv_flags
& IFF_BONDING
) || !(dev
->flags
& IFF_MASTER
))
2746 bond
= netdev_priv(dev
);
2747 read_lock(&bond
->lock
);
2749 pr_debug("bond_arp_rcv: bond %s skb->dev %s orig_dev %s\n",
2750 bond
->dev
->name
, skb
->dev
? skb
->dev
->name
: "NULL",
2751 orig_dev
? orig_dev
->name
: "NULL");
2753 slave
= bond_get_slave_by_dev(bond
, orig_dev
);
2754 if (!slave
|| !slave_do_arp_validate(bond
, slave
))
2757 if (!pskb_may_pull(skb
, arp_hdr_len(dev
)))
2761 if (arp
->ar_hln
!= dev
->addr_len
||
2762 skb
->pkt_type
== PACKET_OTHERHOST
||
2763 skb
->pkt_type
== PACKET_LOOPBACK
||
2764 arp
->ar_hrd
!= htons(ARPHRD_ETHER
) ||
2765 arp
->ar_pro
!= htons(ETH_P_IP
) ||
2769 arp_ptr
= (unsigned char *)(arp
+ 1);
2770 arp_ptr
+= dev
->addr_len
;
2771 memcpy(&sip
, arp_ptr
, 4);
2772 arp_ptr
+= 4 + dev
->addr_len
;
2773 memcpy(&tip
, arp_ptr
, 4);
2775 pr_debug("bond_arp_rcv: %s %s/%d av %d sv %d sip %pI4 tip %pI4\n",
2776 bond
->dev
->name
, slave
->dev
->name
, slave
->state
,
2777 bond
->params
.arp_validate
, slave_do_arp_validate(bond
, slave
),
2781 * Backup slaves won't see the ARP reply, but do come through
2782 * here for each ARP probe (so we swap the sip/tip to validate
2783 * the probe). In a "redundant switch, common router" type of
2784 * configuration, the ARP probe will (hopefully) travel from
2785 * the active, through one switch, the router, then the other
2786 * switch before reaching the backup.
2788 if (slave
->state
== BOND_STATE_ACTIVE
)
2789 bond_validate_arp(bond
, slave
, sip
, tip
);
2791 bond_validate_arp(bond
, slave
, tip
, sip
);
2794 read_unlock(&bond
->lock
);
2797 return NET_RX_SUCCESS
;
2801 * this function is called regularly to monitor each slave's link
2802 * ensuring that traffic is being sent and received when arp monitoring
2803 * is used in load-balancing mode. if the adapter has been dormant, then an
2804 * arp is transmitted to generate traffic. see activebackup_arp_monitor for
2805 * arp monitoring in active backup mode.
2807 void bond_loadbalance_arp_mon(struct work_struct
*work
)
2809 struct bonding
*bond
= container_of(work
, struct bonding
,
2811 struct slave
*slave
, *oldcurrent
;
2812 int do_failover
= 0;
2816 read_lock(&bond
->lock
);
2818 delta_in_ticks
= msecs_to_jiffies(bond
->params
.arp_interval
);
2820 if (bond
->kill_timers
)
2823 if (bond
->slave_cnt
== 0)
2826 read_lock(&bond
->curr_slave_lock
);
2827 oldcurrent
= bond
->curr_active_slave
;
2828 read_unlock(&bond
->curr_slave_lock
);
2830 /* see if any of the previous devices are up now (i.e. they have
2831 * xmt and rcv traffic). the curr_active_slave does not come into
2832 * the picture unless it is null. also, slave->jiffies is not needed
2833 * here because we send an arp on each slave and give a slave as
2834 * long as it needs to get the tx/rx within the delta.
2835 * TODO: what about up/down delay in arp mode? it wasn't here before
2838 bond_for_each_slave(bond
, slave
, i
) {
2839 unsigned long trans_start
= dev_trans_start(slave
->dev
);
2841 if (slave
->link
!= BOND_LINK_UP
) {
2842 if (time_in_range(jiffies
,
2843 trans_start
- delta_in_ticks
,
2844 trans_start
+ delta_in_ticks
) &&
2845 time_in_range(jiffies
,
2846 slave
->dev
->last_rx
- delta_in_ticks
,
2847 slave
->dev
->last_rx
+ delta_in_ticks
)) {
2849 slave
->link
= BOND_LINK_UP
;
2850 slave
->state
= BOND_STATE_ACTIVE
;
2852 /* primary_slave has no meaning in round-robin
2853 * mode. the window of a slave being up and
2854 * curr_active_slave being null after enslaving
2858 pr_info("%s: link status definitely up for interface %s, ",
2863 pr_info("%s: interface %s is now up\n",
2869 /* slave->link == BOND_LINK_UP */
2871 /* not all switches will respond to an arp request
2872 * when the source ip is 0, so don't take the link down
2873 * if we don't know our ip yet
2875 if (!time_in_range(jiffies
,
2876 trans_start
- delta_in_ticks
,
2877 trans_start
+ 2 * delta_in_ticks
) ||
2878 !time_in_range(jiffies
,
2879 slave
->dev
->last_rx
- delta_in_ticks
,
2880 slave
->dev
->last_rx
+ 2 * delta_in_ticks
)) {
2882 slave
->link
= BOND_LINK_DOWN
;
2883 slave
->state
= BOND_STATE_BACKUP
;
2885 if (slave
->link_failure_count
< UINT_MAX
)
2886 slave
->link_failure_count
++;
2888 pr_info("%s: interface %s is now down.\n",
2892 if (slave
== oldcurrent
)
2897 /* note: if switch is in round-robin mode, all links
2898 * must tx arp to ensure all links rx an arp - otherwise
2899 * links may oscillate or not come up at all; if switch is
2900 * in something like xor mode, there is nothing we can
2901 * do - all replies will be rx'ed on same link causing slaves
2902 * to be unstable during low/no traffic periods
2904 if (IS_UP(slave
->dev
))
2905 bond_arp_send_all(bond
, slave
);
2909 write_lock_bh(&bond
->curr_slave_lock
);
2911 bond_select_active_slave(bond
);
2913 write_unlock_bh(&bond
->curr_slave_lock
);
2917 if (bond
->params
.arp_interval
)
2918 queue_delayed_work(bond
->wq
, &bond
->arp_work
, delta_in_ticks
);
2920 read_unlock(&bond
->lock
);
2924 * Called to inspect slaves for active-backup mode ARP monitor link state
2925 * changes. Sets new_link in slaves to specify what action should take
2926 * place for the slave. Returns 0 if no changes are found, >0 if changes
2927 * to link states must be committed.
2929 * Called with bond->lock held for read.
2931 static int bond_ab_arp_inspect(struct bonding
*bond
, int delta_in_ticks
)
2933 struct slave
*slave
;
2935 unsigned long trans_start
;
2937 bond_for_each_slave(bond
, slave
, i
) {
2938 slave
->new_link
= BOND_LINK_NOCHANGE
;
2940 if (slave
->link
!= BOND_LINK_UP
) {
2941 if (time_in_range(jiffies
,
2942 slave_last_rx(bond
, slave
) - delta_in_ticks
,
2943 slave_last_rx(bond
, slave
) + delta_in_ticks
)) {
2945 slave
->new_link
= BOND_LINK_UP
;
2953 * Give slaves 2*delta after being enslaved or made
2954 * active. This avoids bouncing, as the last receive
2955 * times need a full ARP monitor cycle to be updated.
2957 if (time_in_range(jiffies
,
2958 slave
->jiffies
- delta_in_ticks
,
2959 slave
->jiffies
+ 2 * delta_in_ticks
))
2963 * Backup slave is down if:
2964 * - No current_arp_slave AND
2965 * - more than 3*delta since last receive AND
2966 * - the bond has an IP address
2968 * Note: a non-null current_arp_slave indicates
2969 * the curr_active_slave went down and we are
2970 * searching for a new one; under this condition
2971 * we only take the curr_active_slave down - this
2972 * gives each slave a chance to tx/rx traffic
2973 * before being taken out
2975 if (slave
->state
== BOND_STATE_BACKUP
&&
2976 !bond
->current_arp_slave
&&
2977 !time_in_range(jiffies
,
2978 slave_last_rx(bond
, slave
) - delta_in_ticks
,
2979 slave_last_rx(bond
, slave
) + 3 * delta_in_ticks
)) {
2981 slave
->new_link
= BOND_LINK_DOWN
;
2986 * Active slave is down if:
2987 * - more than 2*delta since transmitting OR
2988 * - (more than 2*delta since receive AND
2989 * the bond has an IP address)
2991 trans_start
= dev_trans_start(slave
->dev
);
2992 if ((slave
->state
== BOND_STATE_ACTIVE
) &&
2993 (!time_in_range(jiffies
,
2994 trans_start
- delta_in_ticks
,
2995 trans_start
+ 2 * delta_in_ticks
) ||
2996 !time_in_range(jiffies
,
2997 slave_last_rx(bond
, slave
) - delta_in_ticks
,
2998 slave_last_rx(bond
, slave
) + 2 * delta_in_ticks
))) {
3000 slave
->new_link
= BOND_LINK_DOWN
;
3009 * Called to commit link state changes noted by inspection step of
3010 * active-backup mode ARP monitor.
3012 * Called with RTNL and bond->lock for read.
3014 static void bond_ab_arp_commit(struct bonding
*bond
, int delta_in_ticks
)
3016 struct slave
*slave
;
3018 unsigned long trans_start
;
3020 bond_for_each_slave(bond
, slave
, i
) {
3021 switch (slave
->new_link
) {
3022 case BOND_LINK_NOCHANGE
:
3026 trans_start
= dev_trans_start(slave
->dev
);
3027 if ((!bond
->curr_active_slave
&&
3028 time_in_range(jiffies
,
3029 trans_start
- delta_in_ticks
,
3030 trans_start
+ delta_in_ticks
)) ||
3031 bond
->curr_active_slave
!= slave
) {
3032 slave
->link
= BOND_LINK_UP
;
3033 bond
->current_arp_slave
= NULL
;
3035 pr_info("%s: link status definitely up for interface %s.\n",
3036 bond
->dev
->name
, slave
->dev
->name
);
3038 if (!bond
->curr_active_slave
||
3039 (slave
== bond
->primary_slave
))
3046 case BOND_LINK_DOWN
:
3047 if (slave
->link_failure_count
< UINT_MAX
)
3048 slave
->link_failure_count
++;
3050 slave
->link
= BOND_LINK_DOWN
;
3051 bond_set_slave_inactive_flags(slave
);
3053 pr_info("%s: link status definitely down for interface %s, disabling it\n",
3054 bond
->dev
->name
, slave
->dev
->name
);
3056 if (slave
== bond
->curr_active_slave
) {
3057 bond
->current_arp_slave
= NULL
;
3064 pr_err("%s: impossible: new_link %d on slave %s\n",
3065 bond
->dev
->name
, slave
->new_link
,
3072 write_lock_bh(&bond
->curr_slave_lock
);
3073 bond_select_active_slave(bond
);
3074 write_unlock_bh(&bond
->curr_slave_lock
);
3077 bond_set_carrier(bond
);
3081 * Send ARP probes for active-backup mode ARP monitor.
3083 * Called with bond->lock held for read.
3085 static void bond_ab_arp_probe(struct bonding
*bond
)
3087 struct slave
*slave
;
3090 read_lock(&bond
->curr_slave_lock
);
3092 if (bond
->current_arp_slave
&& bond
->curr_active_slave
)
3093 pr_info("PROBE: c_arp %s && cas %s BAD\n",
3094 bond
->current_arp_slave
->dev
->name
,
3095 bond
->curr_active_slave
->dev
->name
);
3097 if (bond
->curr_active_slave
) {
3098 bond_arp_send_all(bond
, bond
->curr_active_slave
);
3099 read_unlock(&bond
->curr_slave_lock
);
3103 read_unlock(&bond
->curr_slave_lock
);
3105 /* if we don't have a curr_active_slave, search for the next available
3106 * backup slave from the current_arp_slave and make it the candidate
3107 * for becoming the curr_active_slave
3110 if (!bond
->current_arp_slave
) {
3111 bond
->current_arp_slave
= bond
->first_slave
;
3112 if (!bond
->current_arp_slave
)
3116 bond_set_slave_inactive_flags(bond
->current_arp_slave
);
3118 /* search for next candidate */
3119 bond_for_each_slave_from(bond
, slave
, i
, bond
->current_arp_slave
->next
) {
3120 if (IS_UP(slave
->dev
)) {
3121 slave
->link
= BOND_LINK_BACK
;
3122 bond_set_slave_active_flags(slave
);
3123 bond_arp_send_all(bond
, slave
);
3124 slave
->jiffies
= jiffies
;
3125 bond
->current_arp_slave
= slave
;
3129 /* if the link state is up at this point, we
3130 * mark it down - this can happen if we have
3131 * simultaneous link failures and
3132 * reselect_active_interface doesn't make this
3133 * one the current slave so it is still marked
3134 * up when it is actually down
3136 if (slave
->link
== BOND_LINK_UP
) {
3137 slave
->link
= BOND_LINK_DOWN
;
3138 if (slave
->link_failure_count
< UINT_MAX
)
3139 slave
->link_failure_count
++;
3141 bond_set_slave_inactive_flags(slave
);
3143 pr_info("%s: backup interface %s is now down.\n",
3144 bond
->dev
->name
, slave
->dev
->name
);
3149 void bond_activebackup_arp_mon(struct work_struct
*work
)
3151 struct bonding
*bond
= container_of(work
, struct bonding
,
3155 read_lock(&bond
->lock
);
3157 if (bond
->kill_timers
)
3160 delta_in_ticks
= msecs_to_jiffies(bond
->params
.arp_interval
);
3162 if (bond
->slave_cnt
== 0)
3165 if (bond
->send_grat_arp
) {
3166 read_lock(&bond
->curr_slave_lock
);
3167 bond_send_gratuitous_arp(bond
);
3168 read_unlock(&bond
->curr_slave_lock
);
3171 if (bond
->send_unsol_na
) {
3172 read_lock(&bond
->curr_slave_lock
);
3173 bond_send_unsolicited_na(bond
);
3174 read_unlock(&bond
->curr_slave_lock
);
3177 if (bond_ab_arp_inspect(bond
, delta_in_ticks
)) {
3178 read_unlock(&bond
->lock
);
3180 read_lock(&bond
->lock
);
3182 bond_ab_arp_commit(bond
, delta_in_ticks
);
3184 read_unlock(&bond
->lock
);
3186 read_lock(&bond
->lock
);
3189 bond_ab_arp_probe(bond
);
3192 if (bond
->params
.arp_interval
)
3193 queue_delayed_work(bond
->wq
, &bond
->arp_work
, delta_in_ticks
);
3195 read_unlock(&bond
->lock
);
3198 /*------------------------------ proc/seq_file-------------------------------*/
3200 #ifdef CONFIG_PROC_FS
3202 static void *bond_info_seq_start(struct seq_file
*seq
, loff_t
*pos
)
3203 __acquires(&dev_base_lock
)
3204 __acquires(&bond
->lock
)
3206 struct bonding
*bond
= seq
->private;
3208 struct slave
*slave
;
3211 /* make sure the bond won't be taken away */
3212 read_lock(&dev_base_lock
);
3213 read_lock(&bond
->lock
);
3216 return SEQ_START_TOKEN
;
3218 bond_for_each_slave(bond
, slave
, i
) {
3226 static void *bond_info_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
3228 struct bonding
*bond
= seq
->private;
3229 struct slave
*slave
= v
;
3232 if (v
== SEQ_START_TOKEN
)
3233 return bond
->first_slave
;
3235 slave
= slave
->next
;
3237 return (slave
== bond
->first_slave
) ? NULL
: slave
;
3240 static void bond_info_seq_stop(struct seq_file
*seq
, void *v
)
3241 __releases(&bond
->lock
)
3242 __releases(&dev_base_lock
)
3244 struct bonding
*bond
= seq
->private;
3246 read_unlock(&bond
->lock
);
3247 read_unlock(&dev_base_lock
);
3250 static void bond_info_show_master(struct seq_file
*seq
)
3252 struct bonding
*bond
= seq
->private;
3256 read_lock(&bond
->curr_slave_lock
);
3257 curr
= bond
->curr_active_slave
;
3258 read_unlock(&bond
->curr_slave_lock
);
3260 seq_printf(seq
, "Bonding Mode: %s",
3261 bond_mode_name(bond
->params
.mode
));
3263 if (bond
->params
.mode
== BOND_MODE_ACTIVEBACKUP
&&
3264 bond
->params
.fail_over_mac
)
3265 seq_printf(seq
, " (fail_over_mac %s)",
3266 fail_over_mac_tbl
[bond
->params
.fail_over_mac
].modename
);
3268 seq_printf(seq
, "\n");
3270 if (bond
->params
.mode
== BOND_MODE_XOR
||
3271 bond
->params
.mode
== BOND_MODE_8023AD
) {
3272 seq_printf(seq
, "Transmit Hash Policy: %s (%d)\n",
3273 xmit_hashtype_tbl
[bond
->params
.xmit_policy
].modename
,
3274 bond
->params
.xmit_policy
);
3277 if (USES_PRIMARY(bond
->params
.mode
)) {
3278 seq_printf(seq
, "Primary Slave: %s",
3279 (bond
->primary_slave
) ?
3280 bond
->primary_slave
->dev
->name
: "None");
3281 if (bond
->primary_slave
)
3282 seq_printf(seq
, " (primary_reselect %s)",
3283 pri_reselect_tbl
[bond
->params
.primary_reselect
].modename
);
3285 seq_printf(seq
, "\nCurrently Active Slave: %s\n",
3286 (curr
) ? curr
->dev
->name
: "None");
3289 seq_printf(seq
, "MII Status: %s\n", netif_carrier_ok(bond
->dev
) ?
3291 seq_printf(seq
, "MII Polling Interval (ms): %d\n", bond
->params
.miimon
);
3292 seq_printf(seq
, "Up Delay (ms): %d\n",
3293 bond
->params
.updelay
* bond
->params
.miimon
);
3294 seq_printf(seq
, "Down Delay (ms): %d\n",
3295 bond
->params
.downdelay
* bond
->params
.miimon
);
3298 /* ARP information */
3299 if (bond
->params
.arp_interval
> 0) {
3301 seq_printf(seq
, "ARP Polling Interval (ms): %d\n",
3302 bond
->params
.arp_interval
);
3304 seq_printf(seq
, "ARP IP target/s (n.n.n.n form):");
3306 for (i
= 0; (i
< BOND_MAX_ARP_TARGETS
); i
++) {
3307 if (!bond
->params
.arp_targets
[i
])
3310 seq_printf(seq
, ",");
3311 seq_printf(seq
, " %pI4", &bond
->params
.arp_targets
[i
]);
3314 seq_printf(seq
, "\n");
3317 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
3318 struct ad_info ad_info
;
3320 seq_puts(seq
, "\n802.3ad info\n");
3321 seq_printf(seq
, "LACP rate: %s\n",
3322 (bond
->params
.lacp_fast
) ? "fast" : "slow");
3323 seq_printf(seq
, "Aggregator selection policy (ad_select): %s\n",
3324 ad_select_tbl
[bond
->params
.ad_select
].modename
);
3326 if (bond_3ad_get_active_agg_info(bond
, &ad_info
)) {
3327 seq_printf(seq
, "bond %s has no active aggregator\n",
3330 seq_printf(seq
, "Active Aggregator Info:\n");
3332 seq_printf(seq
, "\tAggregator ID: %d\n",
3333 ad_info
.aggregator_id
);
3334 seq_printf(seq
, "\tNumber of ports: %d\n",
3336 seq_printf(seq
, "\tActor Key: %d\n",
3338 seq_printf(seq
, "\tPartner Key: %d\n",
3339 ad_info
.partner_key
);
3340 seq_printf(seq
, "\tPartner Mac Address: %pM\n",
3341 ad_info
.partner_system
);
3346 static void bond_info_show_slave(struct seq_file
*seq
,
3347 const struct slave
*slave
)
3349 struct bonding
*bond
= seq
->private;
3351 seq_printf(seq
, "\nSlave Interface: %s\n", slave
->dev
->name
);
3352 seq_printf(seq
, "MII Status: %s\n",
3353 (slave
->link
== BOND_LINK_UP
) ? "up" : "down");
3354 seq_printf(seq
, "Link Failure Count: %u\n",
3355 slave
->link_failure_count
);
3357 seq_printf(seq
, "Permanent HW addr: %pM\n", slave
->perm_hwaddr
);
3359 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
3360 const struct aggregator
*agg
3361 = SLAVE_AD_INFO(slave
).port
.aggregator
;
3364 seq_printf(seq
, "Aggregator ID: %d\n",
3365 agg
->aggregator_identifier
);
3367 seq_puts(seq
, "Aggregator ID: N/A\n");
3369 seq_printf(seq
, "Slave queue ID: %d\n", slave
->queue_id
);
3372 static int bond_info_seq_show(struct seq_file
*seq
, void *v
)
3374 if (v
== SEQ_START_TOKEN
) {
3375 seq_printf(seq
, "%s\n", version
);
3376 bond_info_show_master(seq
);
3378 bond_info_show_slave(seq
, v
);
3383 static const struct seq_operations bond_info_seq_ops
= {
3384 .start
= bond_info_seq_start
,
3385 .next
= bond_info_seq_next
,
3386 .stop
= bond_info_seq_stop
,
3387 .show
= bond_info_seq_show
,
3390 static int bond_info_open(struct inode
*inode
, struct file
*file
)
3392 struct seq_file
*seq
;
3393 struct proc_dir_entry
*proc
;
3396 res
= seq_open(file
, &bond_info_seq_ops
);
3398 /* recover the pointer buried in proc_dir_entry data */
3399 seq
= file
->private_data
;
3401 seq
->private = proc
->data
;
3407 static const struct file_operations bond_info_fops
= {
3408 .owner
= THIS_MODULE
,
3409 .open
= bond_info_open
,
3411 .llseek
= seq_lseek
,
3412 .release
= seq_release
,
3415 static void bond_create_proc_entry(struct bonding
*bond
)
3417 struct net_device
*bond_dev
= bond
->dev
;
3418 struct bond_net
*bn
= net_generic(dev_net(bond_dev
), bond_net_id
);
3421 bond
->proc_entry
= proc_create_data(bond_dev
->name
,
3422 S_IRUGO
, bn
->proc_dir
,
3423 &bond_info_fops
, bond
);
3424 if (bond
->proc_entry
== NULL
)
3425 pr_warning("Warning: Cannot create /proc/net/%s/%s\n",
3426 DRV_NAME
, bond_dev
->name
);
3428 memcpy(bond
->proc_file_name
, bond_dev
->name
, IFNAMSIZ
);
3432 static void bond_remove_proc_entry(struct bonding
*bond
)
3434 struct net_device
*bond_dev
= bond
->dev
;
3435 struct bond_net
*bn
= net_generic(dev_net(bond_dev
), bond_net_id
);
3437 if (bn
->proc_dir
&& bond
->proc_entry
) {
3438 remove_proc_entry(bond
->proc_file_name
, bn
->proc_dir
);
3439 memset(bond
->proc_file_name
, 0, IFNAMSIZ
);
3440 bond
->proc_entry
= NULL
;
3444 /* Create the bonding directory under /proc/net, if doesn't exist yet.
3445 * Caller must hold rtnl_lock.
3447 static void __net_init
bond_create_proc_dir(struct bond_net
*bn
)
3449 if (!bn
->proc_dir
) {
3450 bn
->proc_dir
= proc_mkdir(DRV_NAME
, bn
->net
->proc_net
);
3452 pr_warning("Warning: cannot create /proc/net/%s\n",
3457 /* Destroy the bonding directory under /proc/net, if empty.
3458 * Caller must hold rtnl_lock.
3460 static void __net_exit
bond_destroy_proc_dir(struct bond_net
*bn
)
3463 remove_proc_entry(DRV_NAME
, bn
->net
->proc_net
);
3464 bn
->proc_dir
= NULL
;
3468 #else /* !CONFIG_PROC_FS */
3470 static void bond_create_proc_entry(struct bonding
*bond
)
3474 static void bond_remove_proc_entry(struct bonding
*bond
)
3478 static inline void bond_create_proc_dir(struct bond_net
*bn
)
3482 static inline void bond_destroy_proc_dir(struct bond_net
*bn
)
3486 #endif /* CONFIG_PROC_FS */
3489 /*-------------------------- netdev event handling --------------------------*/
3492 * Change device name
3494 static int bond_event_changename(struct bonding
*bond
)
3496 bond_remove_proc_entry(bond
);
3497 bond_create_proc_entry(bond
);
3502 static int bond_master_netdev_event(unsigned long event
,
3503 struct net_device
*bond_dev
)
3505 struct bonding
*event_bond
= netdev_priv(bond_dev
);
3508 case NETDEV_CHANGENAME
:
3509 return bond_event_changename(event_bond
);
3517 static int bond_slave_netdev_event(unsigned long event
,
3518 struct net_device
*slave_dev
)
3520 struct net_device
*bond_dev
= slave_dev
->master
;
3521 struct bonding
*bond
= netdev_priv(bond_dev
);
3524 case NETDEV_UNREGISTER
:
3526 if (bond
->setup_by_slave
)
3527 bond_release_and_destroy(bond_dev
, slave_dev
);
3529 bond_release(bond_dev
, slave_dev
);
3533 if (bond
->params
.mode
== BOND_MODE_8023AD
|| bond_is_lb(bond
)) {
3534 struct slave
*slave
;
3536 slave
= bond_get_slave_by_dev(bond
, slave_dev
);
3538 u16 old_speed
= slave
->speed
;
3539 u16 old_duplex
= slave
->duplex
;
3541 bond_update_speed_duplex(slave
);
3543 if (bond_is_lb(bond
))
3546 if (old_speed
!= slave
->speed
)
3547 bond_3ad_adapter_speed_changed(slave
);
3548 if (old_duplex
!= slave
->duplex
)
3549 bond_3ad_adapter_duplex_changed(slave
);
3556 * ... Or is it this?
3559 case NETDEV_CHANGEMTU
:
3561 * TODO: Should slaves be allowed to
3562 * independently alter their MTU? For
3563 * an active-backup bond, slaves need
3564 * not be the same type of device, so
3565 * MTUs may vary. For other modes,
3566 * slaves arguably should have the
3567 * same MTUs. To do this, we'd need to
3568 * take over the slave's change_mtu
3569 * function for the duration of their
3573 case NETDEV_CHANGENAME
:
3575 * TODO: handle changing the primary's name
3578 case NETDEV_FEAT_CHANGE
:
3579 bond_compute_features(bond
);
3589 * bond_netdev_event: handle netdev notifier chain events.
3591 * This function receives events for the netdev chain. The caller (an
3592 * ioctl handler calling blocking_notifier_call_chain) holds the necessary
3593 * locks for us to safely manipulate the slave devices (RTNL lock,
3596 static int bond_netdev_event(struct notifier_block
*this,
3597 unsigned long event
, void *ptr
)
3599 struct net_device
*event_dev
= (struct net_device
*)ptr
;
3601 pr_debug("event_dev: %s, event: %lx\n",
3602 event_dev
? event_dev
->name
: "None",
3605 if (!(event_dev
->priv_flags
& IFF_BONDING
))
3608 if (event_dev
->flags
& IFF_MASTER
) {
3609 pr_debug("IFF_MASTER\n");
3610 return bond_master_netdev_event(event
, event_dev
);
3613 if (event_dev
->flags
& IFF_SLAVE
) {
3614 pr_debug("IFF_SLAVE\n");
3615 return bond_slave_netdev_event(event
, event_dev
);
3622 * bond_inetaddr_event: handle inetaddr notifier chain events.
3624 * We keep track of device IPs primarily to use as source addresses in
3625 * ARP monitor probes (rather than spewing out broadcasts all the time).
3627 * We track one IP for the main device (if it has one), plus one per VLAN.
3629 static int bond_inetaddr_event(struct notifier_block
*this, unsigned long event
, void *ptr
)
3631 struct in_ifaddr
*ifa
= ptr
;
3632 struct net_device
*vlan_dev
, *event_dev
= ifa
->ifa_dev
->dev
;
3633 struct bond_net
*bn
= net_generic(dev_net(event_dev
), bond_net_id
);
3634 struct bonding
*bond
;
3635 struct vlan_entry
*vlan
;
3637 list_for_each_entry(bond
, &bn
->dev_list
, bond_list
) {
3638 if (bond
->dev
== event_dev
) {
3641 bond
->master_ip
= ifa
->ifa_local
;
3644 bond
->master_ip
= bond_glean_dev_ip(bond
->dev
);
3651 list_for_each_entry(vlan
, &bond
->vlan_list
, vlan_list
) {
3654 vlan_dev
= vlan_group_get_device(bond
->vlgrp
, vlan
->vlan_id
);
3655 if (vlan_dev
== event_dev
) {
3658 vlan
->vlan_ip
= ifa
->ifa_local
;
3662 bond_glean_dev_ip(vlan_dev
);
3673 static struct notifier_block bond_netdev_notifier
= {
3674 .notifier_call
= bond_netdev_event
,
3677 static struct notifier_block bond_inetaddr_notifier
= {
3678 .notifier_call
= bond_inetaddr_event
,
3681 /*-------------------------- Packet type handling ---------------------------*/
3683 /* register to receive lacpdus on a bond */
3684 static void bond_register_lacpdu(struct bonding
*bond
)
3686 struct packet_type
*pk_type
= &(BOND_AD_INFO(bond
).ad_pkt_type
);
3688 /* initialize packet type */
3689 pk_type
->type
= PKT_TYPE_LACPDU
;
3690 pk_type
->dev
= bond
->dev
;
3691 pk_type
->func
= bond_3ad_lacpdu_recv
;
3693 dev_add_pack(pk_type
);
3696 /* unregister to receive lacpdus on a bond */
3697 static void bond_unregister_lacpdu(struct bonding
*bond
)
3699 dev_remove_pack(&(BOND_AD_INFO(bond
).ad_pkt_type
));
3702 void bond_register_arp(struct bonding
*bond
)
3704 struct packet_type
*pt
= &bond
->arp_mon_pt
;
3709 pt
->type
= htons(ETH_P_ARP
);
3710 pt
->dev
= bond
->dev
;
3711 pt
->func
= bond_arp_rcv
;
3715 void bond_unregister_arp(struct bonding
*bond
)
3717 struct packet_type
*pt
= &bond
->arp_mon_pt
;
3719 dev_remove_pack(pt
);
3723 /*---------------------------- Hashing Policies -----------------------------*/
3726 * Hash for the output device based upon layer 2 and layer 3 data. If
3727 * the packet is not IP mimic bond_xmit_hash_policy_l2()
3729 static int bond_xmit_hash_policy_l23(struct sk_buff
*skb
, int count
)
3731 struct ethhdr
*data
= (struct ethhdr
*)skb
->data
;
3732 struct iphdr
*iph
= ip_hdr(skb
);
3734 if (skb
->protocol
== htons(ETH_P_IP
)) {
3735 return ((ntohl(iph
->saddr
^ iph
->daddr
) & 0xffff) ^
3736 (data
->h_dest
[5] ^ data
->h_source
[5])) % count
;
3739 return (data
->h_dest
[5] ^ data
->h_source
[5]) % count
;
3743 * Hash for the output device based upon layer 3 and layer 4 data. If
3744 * the packet is a frag or not TCP or UDP, just use layer 3 data. If it is
3745 * altogether not IP, mimic bond_xmit_hash_policy_l2()
3747 static int bond_xmit_hash_policy_l34(struct sk_buff
*skb
, int count
)
3749 struct ethhdr
*data
= (struct ethhdr
*)skb
->data
;
3750 struct iphdr
*iph
= ip_hdr(skb
);
3751 __be16
*layer4hdr
= (__be16
*)((u32
*)iph
+ iph
->ihl
);
3754 if (skb
->protocol
== htons(ETH_P_IP
)) {
3755 if (!(iph
->frag_off
& htons(IP_MF
|IP_OFFSET
)) &&
3756 (iph
->protocol
== IPPROTO_TCP
||
3757 iph
->protocol
== IPPROTO_UDP
)) {
3758 layer4_xor
= ntohs((*layer4hdr
^ *(layer4hdr
+ 1)));
3760 return (layer4_xor
^
3761 ((ntohl(iph
->saddr
^ iph
->daddr
)) & 0xffff)) % count
;
3765 return (data
->h_dest
[5] ^ data
->h_source
[5]) % count
;
3769 * Hash for the output device based upon layer 2 data
3771 static int bond_xmit_hash_policy_l2(struct sk_buff
*skb
, int count
)
3773 struct ethhdr
*data
= (struct ethhdr
*)skb
->data
;
3775 return (data
->h_dest
[5] ^ data
->h_source
[5]) % count
;
3778 /*-------------------------- Device entry points ----------------------------*/
3780 static int bond_open(struct net_device
*bond_dev
)
3782 struct bonding
*bond
= netdev_priv(bond_dev
);
3784 bond
->kill_timers
= 0;
3786 INIT_DELAYED_WORK(&bond
->mcast_work
, bond_resend_igmp_join_requests_delayed
);
3788 if (bond_is_lb(bond
)) {
3789 /* bond_alb_initialize must be called before the timer
3792 if (bond_alb_initialize(bond
, (bond
->params
.mode
== BOND_MODE_ALB
))) {
3793 /* something went wrong - fail the open operation */
3797 INIT_DELAYED_WORK(&bond
->alb_work
, bond_alb_monitor
);
3798 queue_delayed_work(bond
->wq
, &bond
->alb_work
, 0);
3801 if (bond
->params
.miimon
) { /* link check interval, in milliseconds. */
3802 INIT_DELAYED_WORK(&bond
->mii_work
, bond_mii_monitor
);
3803 queue_delayed_work(bond
->wq
, &bond
->mii_work
, 0);
3806 if (bond
->params
.arp_interval
) { /* arp interval, in milliseconds. */
3807 if (bond
->params
.mode
== BOND_MODE_ACTIVEBACKUP
)
3808 INIT_DELAYED_WORK(&bond
->arp_work
,
3809 bond_activebackup_arp_mon
);
3811 INIT_DELAYED_WORK(&bond
->arp_work
,
3812 bond_loadbalance_arp_mon
);
3814 queue_delayed_work(bond
->wq
, &bond
->arp_work
, 0);
3815 if (bond
->params
.arp_validate
)
3816 bond_register_arp(bond
);
3819 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
3820 INIT_DELAYED_WORK(&bond
->ad_work
, bond_3ad_state_machine_handler
);
3821 queue_delayed_work(bond
->wq
, &bond
->ad_work
, 0);
3822 /* register to receive LACPDUs */
3823 bond_register_lacpdu(bond
);
3824 bond_3ad_initiate_agg_selection(bond
, 1);
3830 static int bond_close(struct net_device
*bond_dev
)
3832 struct bonding
*bond
= netdev_priv(bond_dev
);
3834 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
3835 /* Unregister the receive of LACPDUs */
3836 bond_unregister_lacpdu(bond
);
3839 if (bond
->params
.arp_validate
)
3840 bond_unregister_arp(bond
);
3842 write_lock_bh(&bond
->lock
);
3844 bond
->send_grat_arp
= 0;
3845 bond
->send_unsol_na
= 0;
3847 /* signal timers not to re-arm */
3848 bond
->kill_timers
= 1;
3850 write_unlock_bh(&bond
->lock
);
3852 if (bond
->params
.miimon
) { /* link check interval, in milliseconds. */
3853 cancel_delayed_work(&bond
->mii_work
);
3856 if (bond
->params
.arp_interval
) { /* arp interval, in milliseconds. */
3857 cancel_delayed_work(&bond
->arp_work
);
3860 switch (bond
->params
.mode
) {
3861 case BOND_MODE_8023AD
:
3862 cancel_delayed_work(&bond
->ad_work
);
3866 cancel_delayed_work(&bond
->alb_work
);
3872 if (delayed_work_pending(&bond
->mcast_work
))
3873 cancel_delayed_work(&bond
->mcast_work
);
3875 if (bond_is_lb(bond
)) {
3876 /* Must be called only after all
3877 * slaves have been released
3879 bond_alb_deinitialize(bond
);
3885 static struct rtnl_link_stats64
*bond_get_stats(struct net_device
*bond_dev
,
3886 struct rtnl_link_stats64
*stats
)
3888 struct bonding
*bond
= netdev_priv(bond_dev
);
3889 struct rtnl_link_stats64 temp
;
3890 struct slave
*slave
;
3893 memset(stats
, 0, sizeof(*stats
));
3895 read_lock_bh(&bond
->lock
);
3897 bond_for_each_slave(bond
, slave
, i
) {
3898 const struct rtnl_link_stats64
*sstats
=
3899 dev_get_stats(slave
->dev
, &temp
);
3901 stats
->rx_packets
+= sstats
->rx_packets
;
3902 stats
->rx_bytes
+= sstats
->rx_bytes
;
3903 stats
->rx_errors
+= sstats
->rx_errors
;
3904 stats
->rx_dropped
+= sstats
->rx_dropped
;
3906 stats
->tx_packets
+= sstats
->tx_packets
;
3907 stats
->tx_bytes
+= sstats
->tx_bytes
;
3908 stats
->tx_errors
+= sstats
->tx_errors
;
3909 stats
->tx_dropped
+= sstats
->tx_dropped
;
3911 stats
->multicast
+= sstats
->multicast
;
3912 stats
->collisions
+= sstats
->collisions
;
3914 stats
->rx_length_errors
+= sstats
->rx_length_errors
;
3915 stats
->rx_over_errors
+= sstats
->rx_over_errors
;
3916 stats
->rx_crc_errors
+= sstats
->rx_crc_errors
;
3917 stats
->rx_frame_errors
+= sstats
->rx_frame_errors
;
3918 stats
->rx_fifo_errors
+= sstats
->rx_fifo_errors
;
3919 stats
->rx_missed_errors
+= sstats
->rx_missed_errors
;
3921 stats
->tx_aborted_errors
+= sstats
->tx_aborted_errors
;
3922 stats
->tx_carrier_errors
+= sstats
->tx_carrier_errors
;
3923 stats
->tx_fifo_errors
+= sstats
->tx_fifo_errors
;
3924 stats
->tx_heartbeat_errors
+= sstats
->tx_heartbeat_errors
;
3925 stats
->tx_window_errors
+= sstats
->tx_window_errors
;
3928 read_unlock_bh(&bond
->lock
);
3933 static int bond_do_ioctl(struct net_device
*bond_dev
, struct ifreq
*ifr
, int cmd
)
3935 struct net_device
*slave_dev
= NULL
;
3936 struct ifbond k_binfo
;
3937 struct ifbond __user
*u_binfo
= NULL
;
3938 struct ifslave k_sinfo
;
3939 struct ifslave __user
*u_sinfo
= NULL
;
3940 struct mii_ioctl_data
*mii
= NULL
;
3943 pr_debug("bond_ioctl: master=%s, cmd=%d\n", bond_dev
->name
, cmd
);
3955 * We do this again just in case we were called by SIOCGMIIREG
3956 * instead of SIOCGMIIPHY.
3963 if (mii
->reg_num
== 1) {
3964 struct bonding
*bond
= netdev_priv(bond_dev
);
3966 read_lock(&bond
->lock
);
3967 read_lock(&bond
->curr_slave_lock
);
3968 if (netif_carrier_ok(bond
->dev
))
3969 mii
->val_out
= BMSR_LSTATUS
;
3971 read_unlock(&bond
->curr_slave_lock
);
3972 read_unlock(&bond
->lock
);
3976 case BOND_INFO_QUERY_OLD
:
3977 case SIOCBONDINFOQUERY
:
3978 u_binfo
= (struct ifbond __user
*)ifr
->ifr_data
;
3980 if (copy_from_user(&k_binfo
, u_binfo
, sizeof(ifbond
)))
3983 res
= bond_info_query(bond_dev
, &k_binfo
);
3985 copy_to_user(u_binfo
, &k_binfo
, sizeof(ifbond
)))
3989 case BOND_SLAVE_INFO_QUERY_OLD
:
3990 case SIOCBONDSLAVEINFOQUERY
:
3991 u_sinfo
= (struct ifslave __user
*)ifr
->ifr_data
;
3993 if (copy_from_user(&k_sinfo
, u_sinfo
, sizeof(ifslave
)))
3996 res
= bond_slave_info_query(bond_dev
, &k_sinfo
);
3998 copy_to_user(u_sinfo
, &k_sinfo
, sizeof(ifslave
)))
4007 if (!capable(CAP_NET_ADMIN
))
4010 slave_dev
= dev_get_by_name(dev_net(bond_dev
), ifr
->ifr_slave
);
4012 pr_debug("slave_dev=%p:\n", slave_dev
);
4017 pr_debug("slave_dev->name=%s:\n", slave_dev
->name
);
4019 case BOND_ENSLAVE_OLD
:
4020 case SIOCBONDENSLAVE
:
4021 res
= bond_enslave(bond_dev
, slave_dev
);
4023 case BOND_RELEASE_OLD
:
4024 case SIOCBONDRELEASE
:
4025 res
= bond_release(bond_dev
, slave_dev
);
4027 case BOND_SETHWADDR_OLD
:
4028 case SIOCBONDSETHWADDR
:
4029 res
= bond_sethwaddr(bond_dev
, slave_dev
);
4031 case BOND_CHANGE_ACTIVE_OLD
:
4032 case SIOCBONDCHANGEACTIVE
:
4033 res
= bond_ioctl_change_active(bond_dev
, slave_dev
);
4045 static bool bond_addr_in_mc_list(unsigned char *addr
,
4046 struct netdev_hw_addr_list
*list
,
4049 struct netdev_hw_addr
*ha
;
4051 netdev_hw_addr_list_for_each(ha
, list
)
4052 if (!memcmp(ha
->addr
, addr
, addrlen
))
4058 static void bond_set_multicast_list(struct net_device
*bond_dev
)
4060 struct bonding
*bond
= netdev_priv(bond_dev
);
4061 struct netdev_hw_addr
*ha
;
4065 * Do promisc before checking multicast_mode
4067 if ((bond_dev
->flags
& IFF_PROMISC
) && !(bond
->flags
& IFF_PROMISC
))
4069 * FIXME: Need to handle the error when one of the multi-slaves
4072 bond_set_promiscuity(bond
, 1);
4075 if (!(bond_dev
->flags
& IFF_PROMISC
) && (bond
->flags
& IFF_PROMISC
))
4076 bond_set_promiscuity(bond
, -1);
4079 /* set allmulti flag to slaves */
4080 if ((bond_dev
->flags
& IFF_ALLMULTI
) && !(bond
->flags
& IFF_ALLMULTI
))
4082 * FIXME: Need to handle the error when one of the multi-slaves
4085 bond_set_allmulti(bond
, 1);
4088 if (!(bond_dev
->flags
& IFF_ALLMULTI
) && (bond
->flags
& IFF_ALLMULTI
))
4089 bond_set_allmulti(bond
, -1);
4092 read_lock(&bond
->lock
);
4094 bond
->flags
= bond_dev
->flags
;
4096 /* looking for addresses to add to slaves' mc list */
4097 netdev_for_each_mc_addr(ha
, bond_dev
) {
4098 found
= bond_addr_in_mc_list(ha
->addr
, &bond
->mc_list
,
4099 bond_dev
->addr_len
);
4101 bond_mc_add(bond
, ha
->addr
);
4104 /* looking for addresses to delete from slaves' list */
4105 netdev_hw_addr_list_for_each(ha
, &bond
->mc_list
) {
4106 found
= bond_addr_in_mc_list(ha
->addr
, &bond_dev
->mc
,
4107 bond_dev
->addr_len
);
4109 bond_mc_del(bond
, ha
->addr
);
4112 /* save master's multicast list */
4113 __hw_addr_flush(&bond
->mc_list
);
4114 __hw_addr_add_multiple(&bond
->mc_list
, &bond_dev
->mc
,
4115 bond_dev
->addr_len
, NETDEV_HW_ADDR_T_MULTICAST
);
4117 read_unlock(&bond
->lock
);
4120 static int bond_neigh_setup(struct net_device
*dev
, struct neigh_parms
*parms
)
4122 struct bonding
*bond
= netdev_priv(dev
);
4123 struct slave
*slave
= bond
->first_slave
;
4126 const struct net_device_ops
*slave_ops
4127 = slave
->dev
->netdev_ops
;
4128 if (slave_ops
->ndo_neigh_setup
)
4129 return slave_ops
->ndo_neigh_setup(slave
->dev
, parms
);
4135 * Change the MTU of all of a master's slaves to match the master
4137 static int bond_change_mtu(struct net_device
*bond_dev
, int new_mtu
)
4139 struct bonding
*bond
= netdev_priv(bond_dev
);
4140 struct slave
*slave
, *stop_at
;
4144 pr_debug("bond=%p, name=%s, new_mtu=%d\n", bond
,
4145 (bond_dev
? bond_dev
->name
: "None"), new_mtu
);
4147 /* Can't hold bond->lock with bh disabled here since
4148 * some base drivers panic. On the other hand we can't
4149 * hold bond->lock without bh disabled because we'll
4150 * deadlock. The only solution is to rely on the fact
4151 * that we're under rtnl_lock here, and the slaves
4152 * list won't change. This doesn't solve the problem
4153 * of setting the slave's MTU while it is
4154 * transmitting, but the assumption is that the base
4155 * driver can handle that.
4157 * TODO: figure out a way to safely iterate the slaves
4158 * list, but without holding a lock around the actual
4159 * call to the base driver.
4162 bond_for_each_slave(bond
, slave
, i
) {
4163 pr_debug("s %p s->p %p c_m %p\n",
4166 slave
->dev
->netdev_ops
->ndo_change_mtu
);
4168 res
= dev_set_mtu(slave
->dev
, new_mtu
);
4171 /* If we failed to set the slave's mtu to the new value
4172 * we must abort the operation even in ACTIVE_BACKUP
4173 * mode, because if we allow the backup slaves to have
4174 * different mtu values than the active slave we'll
4175 * need to change their mtu when doing a failover. That
4176 * means changing their mtu from timer context, which
4177 * is probably not a good idea.
4179 pr_debug("err %d %s\n", res
, slave
->dev
->name
);
4184 bond_dev
->mtu
= new_mtu
;
4189 /* unwind from head to the slave that failed */
4191 bond_for_each_slave_from_to(bond
, slave
, i
, bond
->first_slave
, stop_at
) {
4194 tmp_res
= dev_set_mtu(slave
->dev
, bond_dev
->mtu
);
4196 pr_debug("unwind err %d dev %s\n",
4197 tmp_res
, slave
->dev
->name
);
4207 * Note that many devices must be down to change the HW address, and
4208 * downing the master releases all slaves. We can make bonds full of
4209 * bonding devices to test this, however.
4211 static int bond_set_mac_address(struct net_device
*bond_dev
, void *addr
)
4213 struct bonding
*bond
= netdev_priv(bond_dev
);
4214 struct sockaddr
*sa
= addr
, tmp_sa
;
4215 struct slave
*slave
, *stop_at
;
4219 if (bond
->params
.mode
== BOND_MODE_ALB
)
4220 return bond_alb_set_mac_address(bond_dev
, addr
);
4223 pr_debug("bond=%p, name=%s\n",
4224 bond
, bond_dev
? bond_dev
->name
: "None");
4227 * If fail_over_mac is set to active, do nothing and return
4228 * success. Returning an error causes ifenslave to fail.
4230 if (bond
->params
.fail_over_mac
== BOND_FOM_ACTIVE
)
4233 if (!is_valid_ether_addr(sa
->sa_data
))
4234 return -EADDRNOTAVAIL
;
4236 /* Can't hold bond->lock with bh disabled here since
4237 * some base drivers panic. On the other hand we can't
4238 * hold bond->lock without bh disabled because we'll
4239 * deadlock. The only solution is to rely on the fact
4240 * that we're under rtnl_lock here, and the slaves
4241 * list won't change. This doesn't solve the problem
4242 * of setting the slave's hw address while it is
4243 * transmitting, but the assumption is that the base
4244 * driver can handle that.
4246 * TODO: figure out a way to safely iterate the slaves
4247 * list, but without holding a lock around the actual
4248 * call to the base driver.
4251 bond_for_each_slave(bond
, slave
, i
) {
4252 const struct net_device_ops
*slave_ops
= slave
->dev
->netdev_ops
;
4253 pr_debug("slave %p %s\n", slave
, slave
->dev
->name
);
4255 if (slave_ops
->ndo_set_mac_address
== NULL
) {
4257 pr_debug("EOPNOTSUPP %s\n", slave
->dev
->name
);
4261 res
= dev_set_mac_address(slave
->dev
, addr
);
4263 /* TODO: consider downing the slave
4265 * User should expect communications
4266 * breakage anyway until ARP finish
4269 pr_debug("err %d %s\n", res
, slave
->dev
->name
);
4275 memcpy(bond_dev
->dev_addr
, sa
->sa_data
, bond_dev
->addr_len
);
4279 memcpy(tmp_sa
.sa_data
, bond_dev
->dev_addr
, bond_dev
->addr_len
);
4280 tmp_sa
.sa_family
= bond_dev
->type
;
4282 /* unwind from head to the slave that failed */
4284 bond_for_each_slave_from_to(bond
, slave
, i
, bond
->first_slave
, stop_at
) {
4287 tmp_res
= dev_set_mac_address(slave
->dev
, &tmp_sa
);
4289 pr_debug("unwind err %d dev %s\n",
4290 tmp_res
, slave
->dev
->name
);
4297 static int bond_xmit_roundrobin(struct sk_buff
*skb
, struct net_device
*bond_dev
)
4299 struct bonding
*bond
= netdev_priv(bond_dev
);
4300 struct slave
*slave
, *start_at
;
4301 int i
, slave_no
, res
= 1;
4302 struct iphdr
*iph
= ip_hdr(skb
);
4304 read_lock(&bond
->lock
);
4306 if (!BOND_IS_OK(bond
))
4309 * Start with the curr_active_slave that joined the bond as the
4310 * default for sending IGMP traffic. For failover purposes one
4311 * needs to maintain some consistency for the interface that will
4312 * send the join/membership reports. The curr_active_slave found
4313 * will send all of this type of traffic.
4315 if ((iph
->protocol
== IPPROTO_IGMP
) &&
4316 (skb
->protocol
== htons(ETH_P_IP
))) {
4318 read_lock(&bond
->curr_slave_lock
);
4319 slave
= bond
->curr_active_slave
;
4320 read_unlock(&bond
->curr_slave_lock
);
4326 * Concurrent TX may collide on rr_tx_counter; we accept
4327 * that as being rare enough not to justify using an
4330 slave_no
= bond
->rr_tx_counter
++ % bond
->slave_cnt
;
4332 bond_for_each_slave(bond
, slave
, i
) {
4340 bond_for_each_slave_from(bond
, slave
, i
, start_at
) {
4341 if (IS_UP(slave
->dev
) &&
4342 (slave
->link
== BOND_LINK_UP
) &&
4343 (slave
->state
== BOND_STATE_ACTIVE
)) {
4344 res
= bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
4351 /* no suitable interface, frame not sent */
4354 read_unlock(&bond
->lock
);
4355 return NETDEV_TX_OK
;
4360 * in active-backup mode, we know that bond->curr_active_slave is always valid if
4361 * the bond has a usable interface.
4363 static int bond_xmit_activebackup(struct sk_buff
*skb
, struct net_device
*bond_dev
)
4365 struct bonding
*bond
= netdev_priv(bond_dev
);
4368 read_lock(&bond
->lock
);
4369 read_lock(&bond
->curr_slave_lock
);
4371 if (!BOND_IS_OK(bond
))
4374 if (!bond
->curr_active_slave
)
4377 res
= bond_dev_queue_xmit(bond
, skb
, bond
->curr_active_slave
->dev
);
4381 /* no suitable interface, frame not sent */
4384 read_unlock(&bond
->curr_slave_lock
);
4385 read_unlock(&bond
->lock
);
4386 return NETDEV_TX_OK
;
4390 * In bond_xmit_xor() , we determine the output device by using a pre-
4391 * determined xmit_hash_policy(), If the selected device is not enabled,
4392 * find the next active slave.
4394 static int bond_xmit_xor(struct sk_buff
*skb
, struct net_device
*bond_dev
)
4396 struct bonding
*bond
= netdev_priv(bond_dev
);
4397 struct slave
*slave
, *start_at
;
4402 read_lock(&bond
->lock
);
4404 if (!BOND_IS_OK(bond
))
4407 slave_no
= bond
->xmit_hash_policy(skb
, bond
->slave_cnt
);
4409 bond_for_each_slave(bond
, slave
, i
) {
4417 bond_for_each_slave_from(bond
, slave
, i
, start_at
) {
4418 if (IS_UP(slave
->dev
) &&
4419 (slave
->link
== BOND_LINK_UP
) &&
4420 (slave
->state
== BOND_STATE_ACTIVE
)) {
4421 res
= bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
4428 /* no suitable interface, frame not sent */
4431 read_unlock(&bond
->lock
);
4432 return NETDEV_TX_OK
;
4436 * in broadcast mode, we send everything to all usable interfaces.
4438 static int bond_xmit_broadcast(struct sk_buff
*skb
, struct net_device
*bond_dev
)
4440 struct bonding
*bond
= netdev_priv(bond_dev
);
4441 struct slave
*slave
, *start_at
;
4442 struct net_device
*tx_dev
= NULL
;
4446 read_lock(&bond
->lock
);
4448 if (!BOND_IS_OK(bond
))
4451 read_lock(&bond
->curr_slave_lock
);
4452 start_at
= bond
->curr_active_slave
;
4453 read_unlock(&bond
->curr_slave_lock
);
4458 bond_for_each_slave_from(bond
, slave
, i
, start_at
) {
4459 if (IS_UP(slave
->dev
) &&
4460 (slave
->link
== BOND_LINK_UP
) &&
4461 (slave
->state
== BOND_STATE_ACTIVE
)) {
4463 struct sk_buff
*skb2
= skb_clone(skb
, GFP_ATOMIC
);
4465 pr_err("%s: Error: bond_xmit_broadcast(): skb_clone() failed\n",
4470 res
= bond_dev_queue_xmit(bond
, skb2
, tx_dev
);
4472 dev_kfree_skb(skb2
);
4476 tx_dev
= slave
->dev
;
4481 res
= bond_dev_queue_xmit(bond
, skb
, tx_dev
);
4485 /* no suitable interface, frame not sent */
4488 /* frame sent to all suitable interfaces */
4489 read_unlock(&bond
->lock
);
4490 return NETDEV_TX_OK
;
4493 /*------------------------- Device initialization ---------------------------*/
4495 static void bond_set_xmit_hash_policy(struct bonding
*bond
)
4497 switch (bond
->params
.xmit_policy
) {
4498 case BOND_XMIT_POLICY_LAYER23
:
4499 bond
->xmit_hash_policy
= bond_xmit_hash_policy_l23
;
4501 case BOND_XMIT_POLICY_LAYER34
:
4502 bond
->xmit_hash_policy
= bond_xmit_hash_policy_l34
;
4504 case BOND_XMIT_POLICY_LAYER2
:
4506 bond
->xmit_hash_policy
= bond_xmit_hash_policy_l2
;
4512 * Lookup the slave that corresponds to a qid
4514 static inline int bond_slave_override(struct bonding
*bond
,
4515 struct sk_buff
*skb
)
4518 struct slave
*slave
= NULL
;
4519 struct slave
*check_slave
;
4521 read_lock(&bond
->lock
);
4523 if (!BOND_IS_OK(bond
) || !skb
->queue_mapping
)
4526 /* Find out if any slaves have the same mapping as this skb. */
4527 bond_for_each_slave(bond
, check_slave
, i
) {
4528 if (check_slave
->queue_id
== skb
->queue_mapping
) {
4529 slave
= check_slave
;
4534 /* If the slave isn't UP, use default transmit policy. */
4535 if (slave
&& slave
->queue_id
&& IS_UP(slave
->dev
) &&
4536 (slave
->link
== BOND_LINK_UP
)) {
4537 res
= bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
4541 read_unlock(&bond
->lock
);
4545 static u16
bond_select_queue(struct net_device
*dev
, struct sk_buff
*skb
)
4548 * This helper function exists to help dev_pick_tx get the correct
4549 * destination queue. Using a helper function skips the a call to
4550 * skb_tx_hash and will put the skbs in the queue we expect on their
4551 * way down to the bonding driver.
4553 return skb
->queue_mapping
;
4556 static netdev_tx_t
bond_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
4558 struct bonding
*bond
= netdev_priv(dev
);
4560 if (TX_QUEUE_OVERRIDE(bond
->params
.mode
)) {
4561 if (!bond_slave_override(bond
, skb
))
4562 return NETDEV_TX_OK
;
4565 switch (bond
->params
.mode
) {
4566 case BOND_MODE_ROUNDROBIN
:
4567 return bond_xmit_roundrobin(skb
, dev
);
4568 case BOND_MODE_ACTIVEBACKUP
:
4569 return bond_xmit_activebackup(skb
, dev
);
4571 return bond_xmit_xor(skb
, dev
);
4572 case BOND_MODE_BROADCAST
:
4573 return bond_xmit_broadcast(skb
, dev
);
4574 case BOND_MODE_8023AD
:
4575 return bond_3ad_xmit_xor(skb
, dev
);
4578 return bond_alb_xmit(skb
, dev
);
4580 /* Should never happen, mode already checked */
4581 pr_err("%s: Error: Unknown bonding mode %d\n",
4582 dev
->name
, bond
->params
.mode
);
4585 return NETDEV_TX_OK
;
4591 * set bond mode specific net device operations
4593 void bond_set_mode_ops(struct bonding
*bond
, int mode
)
4595 struct net_device
*bond_dev
= bond
->dev
;
4598 case BOND_MODE_ROUNDROBIN
:
4600 case BOND_MODE_ACTIVEBACKUP
:
4603 bond_set_xmit_hash_policy(bond
);
4605 case BOND_MODE_BROADCAST
:
4607 case BOND_MODE_8023AD
:
4608 bond_set_master_3ad_flags(bond
);
4609 bond_set_xmit_hash_policy(bond
);
4612 bond_set_master_alb_flags(bond
);
4617 /* Should never happen, mode already checked */
4618 pr_err("%s: Error: Unknown bonding mode %d\n",
4619 bond_dev
->name
, mode
);
4624 static void bond_ethtool_get_drvinfo(struct net_device
*bond_dev
,
4625 struct ethtool_drvinfo
*drvinfo
)
4627 strncpy(drvinfo
->driver
, DRV_NAME
, 32);
4628 strncpy(drvinfo
->version
, DRV_VERSION
, 32);
4629 snprintf(drvinfo
->fw_version
, 32, "%d", BOND_ABI_VERSION
);
4632 static const struct ethtool_ops bond_ethtool_ops
= {
4633 .get_drvinfo
= bond_ethtool_get_drvinfo
,
4634 .get_link
= ethtool_op_get_link
,
4635 .get_tx_csum
= ethtool_op_get_tx_csum
,
4636 .get_sg
= ethtool_op_get_sg
,
4637 .get_tso
= ethtool_op_get_tso
,
4638 .get_ufo
= ethtool_op_get_ufo
,
4639 .get_flags
= ethtool_op_get_flags
,
4642 static const struct net_device_ops bond_netdev_ops
= {
4643 .ndo_init
= bond_init
,
4644 .ndo_uninit
= bond_uninit
,
4645 .ndo_open
= bond_open
,
4646 .ndo_stop
= bond_close
,
4647 .ndo_start_xmit
= bond_start_xmit
,
4648 .ndo_select_queue
= bond_select_queue
,
4649 .ndo_get_stats64
= bond_get_stats
,
4650 .ndo_do_ioctl
= bond_do_ioctl
,
4651 .ndo_set_multicast_list
= bond_set_multicast_list
,
4652 .ndo_change_mtu
= bond_change_mtu
,
4653 .ndo_set_mac_address
= bond_set_mac_address
,
4654 .ndo_neigh_setup
= bond_neigh_setup
,
4655 .ndo_vlan_rx_register
= bond_vlan_rx_register
,
4656 .ndo_vlan_rx_add_vid
= bond_vlan_rx_add_vid
,
4657 .ndo_vlan_rx_kill_vid
= bond_vlan_rx_kill_vid
,
4658 #ifdef CONFIG_NET_POLL_CONTROLLER
4659 .ndo_netpoll_cleanup
= bond_netpoll_cleanup
,
4660 .ndo_poll_controller
= bond_poll_controller
,
4664 static void bond_destructor(struct net_device
*bond_dev
)
4666 struct bonding
*bond
= netdev_priv(bond_dev
);
4668 destroy_workqueue(bond
->wq
);
4669 free_netdev(bond_dev
);
4672 static void bond_setup(struct net_device
*bond_dev
)
4674 struct bonding
*bond
= netdev_priv(bond_dev
);
4676 /* initialize rwlocks */
4677 rwlock_init(&bond
->lock
);
4678 rwlock_init(&bond
->curr_slave_lock
);
4680 bond
->params
= bonding_defaults
;
4682 /* Initialize pointers */
4683 bond
->dev
= bond_dev
;
4684 INIT_LIST_HEAD(&bond
->vlan_list
);
4686 /* Initialize the device entry points */
4687 ether_setup(bond_dev
);
4688 bond_dev
->netdev_ops
= &bond_netdev_ops
;
4689 bond_dev
->ethtool_ops
= &bond_ethtool_ops
;
4690 bond_set_mode_ops(bond
, bond
->params
.mode
);
4692 bond_dev
->destructor
= bond_destructor
;
4694 /* Initialize the device options */
4695 bond_dev
->tx_queue_len
= 0;
4696 bond_dev
->flags
|= IFF_MASTER
|IFF_MULTICAST
;
4697 bond_dev
->priv_flags
|= IFF_BONDING
;
4698 bond_dev
->priv_flags
&= ~IFF_XMIT_DST_RELEASE
;
4700 if (bond
->params
.arp_interval
)
4701 bond_dev
->priv_flags
|= IFF_MASTER_ARPMON
;
4703 /* At first, we block adding VLANs. That's the only way to
4704 * prevent problems that occur when adding VLANs over an
4705 * empty bond. The block will be removed once non-challenged
4706 * slaves are enslaved.
4708 bond_dev
->features
|= NETIF_F_VLAN_CHALLENGED
;
4710 /* don't acquire bond device's netif_tx_lock when
4712 bond_dev
->features
|= NETIF_F_LLTX
;
4714 /* By default, we declare the bond to be fully
4715 * VLAN hardware accelerated capable. Special
4716 * care is taken in the various xmit functions
4717 * when there are slaves that are not hw accel
4720 bond_dev
->features
|= (NETIF_F_HW_VLAN_TX
|
4721 NETIF_F_HW_VLAN_RX
|
4722 NETIF_F_HW_VLAN_FILTER
);
4724 /* By default, we enable GRO on bonding devices.
4725 * Actual support requires lowlevel drivers are GRO ready.
4727 bond_dev
->features
|= NETIF_F_GRO
;
4730 static void bond_work_cancel_all(struct bonding
*bond
)
4732 write_lock_bh(&bond
->lock
);
4733 bond
->kill_timers
= 1;
4734 write_unlock_bh(&bond
->lock
);
4736 if (bond
->params
.miimon
&& delayed_work_pending(&bond
->mii_work
))
4737 cancel_delayed_work(&bond
->mii_work
);
4739 if (bond
->params
.arp_interval
&& delayed_work_pending(&bond
->arp_work
))
4740 cancel_delayed_work(&bond
->arp_work
);
4742 if (bond
->params
.mode
== BOND_MODE_ALB
&&
4743 delayed_work_pending(&bond
->alb_work
))
4744 cancel_delayed_work(&bond
->alb_work
);
4746 if (bond
->params
.mode
== BOND_MODE_8023AD
&&
4747 delayed_work_pending(&bond
->ad_work
))
4748 cancel_delayed_work(&bond
->ad_work
);
4750 if (delayed_work_pending(&bond
->mcast_work
))
4751 cancel_delayed_work(&bond
->mcast_work
);
4755 * Destroy a bonding device.
4756 * Must be under rtnl_lock when this function is called.
4758 static void bond_uninit(struct net_device
*bond_dev
)
4760 struct bonding
*bond
= netdev_priv(bond_dev
);
4761 struct vlan_entry
*vlan
, *tmp
;
4763 bond_netpoll_cleanup(bond_dev
);
4765 /* Release the bonded slaves */
4766 bond_release_all(bond_dev
);
4768 list_del(&bond
->bond_list
);
4770 bond_work_cancel_all(bond
);
4772 bond_remove_proc_entry(bond
);
4774 __hw_addr_flush(&bond
->mc_list
);
4776 list_for_each_entry_safe(vlan
, tmp
, &bond
->vlan_list
, vlan_list
) {
4777 list_del(&vlan
->vlan_list
);
4782 /*------------------------- Module initialization ---------------------------*/
4785 * Convert string input module parms. Accept either the
4786 * number of the mode or its string name. A bit complicated because
4787 * some mode names are substrings of other names, and calls from sysfs
4788 * may have whitespace in the name (trailing newlines, for example).
4790 int bond_parse_parm(const char *buf
, const struct bond_parm_tbl
*tbl
)
4792 int modeint
= -1, i
, rv
;
4793 char *p
, modestr
[BOND_MAX_MODENAME_LEN
+ 1] = { 0, };
4795 for (p
= (char *)buf
; *p
; p
++)
4796 if (!(isdigit(*p
) || isspace(*p
)))
4800 rv
= sscanf(buf
, "%20s", modestr
);
4802 rv
= sscanf(buf
, "%d", &modeint
);
4807 for (i
= 0; tbl
[i
].modename
; i
++) {
4808 if (modeint
== tbl
[i
].mode
)
4810 if (strcmp(modestr
, tbl
[i
].modename
) == 0)
4817 static int bond_check_params(struct bond_params
*params
)
4819 int arp_validate_value
, fail_over_mac_value
, primary_reselect_value
;
4822 * Convert string parameters.
4825 bond_mode
= bond_parse_parm(mode
, bond_mode_tbl
);
4826 if (bond_mode
== -1) {
4827 pr_err("Error: Invalid bonding mode \"%s\"\n",
4828 mode
== NULL
? "NULL" : mode
);
4833 if (xmit_hash_policy
) {
4834 if ((bond_mode
!= BOND_MODE_XOR
) &&
4835 (bond_mode
!= BOND_MODE_8023AD
)) {
4836 pr_info("xmit_hash_policy param is irrelevant in mode %s\n",
4837 bond_mode_name(bond_mode
));
4839 xmit_hashtype
= bond_parse_parm(xmit_hash_policy
,
4841 if (xmit_hashtype
== -1) {
4842 pr_err("Error: Invalid xmit_hash_policy \"%s\"\n",
4843 xmit_hash_policy
== NULL
? "NULL" :
4851 if (bond_mode
!= BOND_MODE_8023AD
) {
4852 pr_info("lacp_rate param is irrelevant in mode %s\n",
4853 bond_mode_name(bond_mode
));
4855 lacp_fast
= bond_parse_parm(lacp_rate
, bond_lacp_tbl
);
4856 if (lacp_fast
== -1) {
4857 pr_err("Error: Invalid lacp rate \"%s\"\n",
4858 lacp_rate
== NULL
? "NULL" : lacp_rate
);
4865 params
->ad_select
= bond_parse_parm(ad_select
, ad_select_tbl
);
4866 if (params
->ad_select
== -1) {
4867 pr_err("Error: Invalid ad_select \"%s\"\n",
4868 ad_select
== NULL
? "NULL" : ad_select
);
4872 if (bond_mode
!= BOND_MODE_8023AD
) {
4873 pr_warning("ad_select param only affects 802.3ad mode\n");
4876 params
->ad_select
= BOND_AD_STABLE
;
4879 if (max_bonds
< 0) {
4880 pr_warning("Warning: max_bonds (%d) not in range %d-%d, so it was reset to BOND_DEFAULT_MAX_BONDS (%d)\n",
4881 max_bonds
, 0, INT_MAX
, BOND_DEFAULT_MAX_BONDS
);
4882 max_bonds
= BOND_DEFAULT_MAX_BONDS
;
4886 pr_warning("Warning: miimon module parameter (%d), not in range 0-%d, so it was reset to %d\n",
4887 miimon
, INT_MAX
, BOND_LINK_MON_INTERV
);
4888 miimon
= BOND_LINK_MON_INTERV
;
4892 pr_warning("Warning: updelay module parameter (%d), not in range 0-%d, so it was reset to 0\n",
4897 if (downdelay
< 0) {
4898 pr_warning("Warning: downdelay module parameter (%d), not in range 0-%d, so it was reset to 0\n",
4899 downdelay
, INT_MAX
);
4903 if ((use_carrier
!= 0) && (use_carrier
!= 1)) {
4904 pr_warning("Warning: use_carrier module parameter (%d), not of valid value (0/1), so it was set to 1\n",
4909 if (num_grat_arp
< 0 || num_grat_arp
> 255) {
4910 pr_warning("Warning: num_grat_arp (%d) not in range 0-255 so it was reset to 1\n",
4915 if (num_unsol_na
< 0 || num_unsol_na
> 255) {
4916 pr_warning("Warning: num_unsol_na (%d) not in range 0-255 so it was reset to 1\n",
4921 /* reset values for 802.3ad */
4922 if (bond_mode
== BOND_MODE_8023AD
) {
4924 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");
4925 pr_warning("Forcing miimon to 100msec\n");
4930 if (tx_queues
< 1 || tx_queues
> 255) {
4931 pr_warning("Warning: tx_queues (%d) should be between "
4932 "1 and 255, resetting to %d\n",
4933 tx_queues
, BOND_DEFAULT_TX_QUEUES
);
4934 tx_queues
= BOND_DEFAULT_TX_QUEUES
;
4937 if ((all_slaves_active
!= 0) && (all_slaves_active
!= 1)) {
4938 pr_warning("Warning: all_slaves_active module parameter (%d), "
4939 "not of valid value (0/1), so it was set to "
4940 "0\n", all_slaves_active
);
4941 all_slaves_active
= 0;
4944 if (resend_igmp
< 0 || resend_igmp
> 255) {
4945 pr_warning("Warning: resend_igmp (%d) should be between "
4946 "0 and 255, resetting to %d\n",
4947 resend_igmp
, BOND_DEFAULT_RESEND_IGMP
);
4948 resend_igmp
= BOND_DEFAULT_RESEND_IGMP
;
4951 /* reset values for TLB/ALB */
4952 if ((bond_mode
== BOND_MODE_TLB
) ||
4953 (bond_mode
== BOND_MODE_ALB
)) {
4955 pr_warning("Warning: miimon must be specified, otherwise bonding will not detect link failure and link speed which are essential for TLB/ALB load balancing\n");
4956 pr_warning("Forcing miimon to 100msec\n");
4961 if (bond_mode
== BOND_MODE_ALB
) {
4962 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",
4967 if (updelay
|| downdelay
) {
4968 /* just warn the user the up/down delay will have
4969 * no effect since miimon is zero...
4971 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",
4972 updelay
, downdelay
);
4975 /* don't allow arp monitoring */
4977 pr_warning("Warning: miimon (%d) and arp_interval (%d) can't be used simultaneously, disabling ARP monitoring\n",
4978 miimon
, arp_interval
);
4982 if ((updelay
% miimon
) != 0) {
4983 pr_warning("Warning: updelay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
4985 (updelay
/ miimon
) * miimon
);
4990 if ((downdelay
% miimon
) != 0) {
4991 pr_warning("Warning: downdelay (%d) is not a multiple of miimon (%d), downdelay rounded to %d ms\n",
4993 (downdelay
/ miimon
) * miimon
);
4996 downdelay
/= miimon
;
4999 if (arp_interval
< 0) {
5000 pr_warning("Warning: arp_interval module parameter (%d) , not in range 0-%d, so it was reset to %d\n",
5001 arp_interval
, INT_MAX
, BOND_LINK_ARP_INTERV
);
5002 arp_interval
= BOND_LINK_ARP_INTERV
;
5005 for (arp_ip_count
= 0;
5006 (arp_ip_count
< BOND_MAX_ARP_TARGETS
) && arp_ip_target
[arp_ip_count
];
5008 /* not complete check, but should be good enough to
5010 if (!isdigit(arp_ip_target
[arp_ip_count
][0])) {
5011 pr_warning("Warning: bad arp_ip_target module parameter (%s), ARP monitoring will not be performed\n",
5012 arp_ip_target
[arp_ip_count
]);
5015 __be32 ip
= in_aton(arp_ip_target
[arp_ip_count
]);
5016 arp_target
[arp_ip_count
] = ip
;
5020 if (arp_interval
&& !arp_ip_count
) {
5021 /* don't allow arping if no arp_ip_target given... */
5022 pr_warning("Warning: arp_interval module parameter (%d) specified without providing an arp_ip_target parameter, arp_interval was reset to 0\n",
5028 if (bond_mode
!= BOND_MODE_ACTIVEBACKUP
) {
5029 pr_err("arp_validate only supported in active-backup mode\n");
5032 if (!arp_interval
) {
5033 pr_err("arp_validate requires arp_interval\n");
5037 arp_validate_value
= bond_parse_parm(arp_validate
,
5039 if (arp_validate_value
== -1) {
5040 pr_err("Error: invalid arp_validate \"%s\"\n",
5041 arp_validate
== NULL
? "NULL" : arp_validate
);
5045 arp_validate_value
= 0;
5048 pr_info("MII link monitoring set to %d ms\n", miimon
);
5049 } else if (arp_interval
) {
5052 pr_info("ARP monitoring set to %d ms, validate %s, with %d target(s):",
5054 arp_validate_tbl
[arp_validate_value
].modename
,
5057 for (i
= 0; i
< arp_ip_count
; i
++)
5058 pr_info(" %s", arp_ip_target
[i
]);
5062 } else if (max_bonds
) {
5063 /* miimon and arp_interval not set, we need one so things
5064 * work as expected, see bonding.txt for details
5066 pr_warning("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");
5069 if (primary
&& !USES_PRIMARY(bond_mode
)) {
5070 /* currently, using a primary only makes sense
5071 * in active backup, TLB or ALB modes
5073 pr_warning("Warning: %s primary device specified but has no effect in %s mode\n",
5074 primary
, bond_mode_name(bond_mode
));
5078 if (primary
&& primary_reselect
) {
5079 primary_reselect_value
= bond_parse_parm(primary_reselect
,
5081 if (primary_reselect_value
== -1) {
5082 pr_err("Error: Invalid primary_reselect \"%s\"\n",
5084 NULL
? "NULL" : primary_reselect
);
5088 primary_reselect_value
= BOND_PRI_RESELECT_ALWAYS
;
5091 if (fail_over_mac
) {
5092 fail_over_mac_value
= bond_parse_parm(fail_over_mac
,
5094 if (fail_over_mac_value
== -1) {
5095 pr_err("Error: invalid fail_over_mac \"%s\"\n",
5096 arp_validate
== NULL
? "NULL" : arp_validate
);
5100 if (bond_mode
!= BOND_MODE_ACTIVEBACKUP
)
5101 pr_warning("Warning: fail_over_mac only affects active-backup mode.\n");
5103 fail_over_mac_value
= BOND_FOM_NONE
;
5106 /* fill params struct with the proper values */
5107 params
->mode
= bond_mode
;
5108 params
->xmit_policy
= xmit_hashtype
;
5109 params
->miimon
= miimon
;
5110 params
->num_grat_arp
= num_grat_arp
;
5111 params
->num_unsol_na
= num_unsol_na
;
5112 params
->arp_interval
= arp_interval
;
5113 params
->arp_validate
= arp_validate_value
;
5114 params
->updelay
= updelay
;
5115 params
->downdelay
= downdelay
;
5116 params
->use_carrier
= use_carrier
;
5117 params
->lacp_fast
= lacp_fast
;
5118 params
->primary
[0] = 0;
5119 params
->primary_reselect
= primary_reselect_value
;
5120 params
->fail_over_mac
= fail_over_mac_value
;
5121 params
->tx_queues
= tx_queues
;
5122 params
->all_slaves_active
= all_slaves_active
;
5123 params
->resend_igmp
= resend_igmp
;
5126 strncpy(params
->primary
, primary
, IFNAMSIZ
);
5127 params
->primary
[IFNAMSIZ
- 1] = 0;
5130 memcpy(params
->arp_targets
, arp_target
, sizeof(arp_target
));
5135 static struct lock_class_key bonding_netdev_xmit_lock_key
;
5136 static struct lock_class_key bonding_netdev_addr_lock_key
;
5138 static void bond_set_lockdep_class_one(struct net_device
*dev
,
5139 struct netdev_queue
*txq
,
5142 lockdep_set_class(&txq
->_xmit_lock
,
5143 &bonding_netdev_xmit_lock_key
);
5146 static void bond_set_lockdep_class(struct net_device
*dev
)
5148 lockdep_set_class(&dev
->addr_list_lock
,
5149 &bonding_netdev_addr_lock_key
);
5150 netdev_for_each_tx_queue(dev
, bond_set_lockdep_class_one
, NULL
);
5154 * Called from registration process
5156 static int bond_init(struct net_device
*bond_dev
)
5158 struct bonding
*bond
= netdev_priv(bond_dev
);
5159 struct bond_net
*bn
= net_generic(dev_net(bond_dev
), bond_net_id
);
5161 pr_debug("Begin bond_init for %s\n", bond_dev
->name
);
5163 bond
->wq
= create_singlethread_workqueue(bond_dev
->name
);
5167 bond_set_lockdep_class(bond_dev
);
5169 netif_carrier_off(bond_dev
);
5171 bond_create_proc_entry(bond
);
5172 list_add_tail(&bond
->bond_list
, &bn
->dev_list
);
5174 bond_prepare_sysfs_group(bond
);
5176 __hw_addr_init(&bond
->mc_list
);
5180 static int bond_validate(struct nlattr
*tb
[], struct nlattr
*data
[])
5182 if (tb
[IFLA_ADDRESS
]) {
5183 if (nla_len(tb
[IFLA_ADDRESS
]) != ETH_ALEN
)
5185 if (!is_valid_ether_addr(nla_data(tb
[IFLA_ADDRESS
])))
5186 return -EADDRNOTAVAIL
;
5191 static struct rtnl_link_ops bond_link_ops __read_mostly
= {
5193 .priv_size
= sizeof(struct bonding
),
5194 .setup
= bond_setup
,
5195 .validate
= bond_validate
,
5198 /* Create a new bond based on the specified name and bonding parameters.
5199 * If name is NULL, obtain a suitable "bond%d" name for us.
5200 * Caller must NOT hold rtnl_lock; we need to release it here before we
5201 * set up our sysfs entries.
5203 int bond_create(struct net
*net
, const char *name
)
5205 struct net_device
*bond_dev
;
5210 bond_dev
= alloc_netdev_mq(sizeof(struct bonding
), name
? name
: "",
5211 bond_setup
, tx_queues
);
5213 pr_err("%s: eek! can't alloc netdev!\n", name
);
5218 dev_net_set(bond_dev
, net
);
5219 bond_dev
->rtnl_link_ops
= &bond_link_ops
;
5222 res
= dev_alloc_name(bond_dev
, "bond%d");
5227 res
= register_netdevice(bond_dev
);
5232 bond_destructor(bond_dev
);
5236 static int __net_init
bond_net_init(struct net
*net
)
5238 struct bond_net
*bn
= net_generic(net
, bond_net_id
);
5241 INIT_LIST_HEAD(&bn
->dev_list
);
5243 bond_create_proc_dir(bn
);
5248 static void __net_exit
bond_net_exit(struct net
*net
)
5250 struct bond_net
*bn
= net_generic(net
, bond_net_id
);
5252 bond_destroy_proc_dir(bn
);
5255 static struct pernet_operations bond_net_ops
= {
5256 .init
= bond_net_init
,
5257 .exit
= bond_net_exit
,
5259 .size
= sizeof(struct bond_net
),
5262 static int __init
bonding_init(void)
5267 pr_info("%s", version
);
5269 res
= bond_check_params(&bonding_defaults
);
5273 res
= register_pernet_subsys(&bond_net_ops
);
5277 res
= rtnl_link_register(&bond_link_ops
);
5281 for (i
= 0; i
< max_bonds
; i
++) {
5282 res
= bond_create(&init_net
, NULL
);
5287 res
= bond_create_sysfs();
5291 register_netdevice_notifier(&bond_netdev_notifier
);
5292 register_inetaddr_notifier(&bond_inetaddr_notifier
);
5293 bond_register_ipv6_notifier();
5297 rtnl_link_unregister(&bond_link_ops
);
5299 unregister_pernet_subsys(&bond_net_ops
);
5304 static void __exit
bonding_exit(void)
5306 unregister_netdevice_notifier(&bond_netdev_notifier
);
5307 unregister_inetaddr_notifier(&bond_inetaddr_notifier
);
5308 bond_unregister_ipv6_notifier();
5310 bond_destroy_sysfs();
5312 rtnl_link_unregister(&bond_link_ops
);
5313 unregister_pernet_subsys(&bond_net_ops
);
5316 module_init(bonding_init
);
5317 module_exit(bonding_exit
);
5318 MODULE_LICENSE("GPL");
5319 MODULE_VERSION(DRV_VERSION
);
5320 MODULE_DESCRIPTION(DRV_DESCRIPTION
", v" DRV_VERSION
);
5321 MODULE_AUTHOR("Thomas Davis, tadavis@lbl.gov and many others");
5322 MODULE_ALIAS_RTNL_LINK("bond");