2 * originally based on the dummy device.
4 * Copyright 1999, Thomas Davis, tadavis@lbl.gov.
5 * Licensed under the GPL. Based on dummy.c, and eql.c devices.
7 * bonding.c: an Ethernet Bonding driver
9 * This is useful to talk to a Cisco EtherChannel compatible equipment:
11 * Sun Trunking (Solaris)
12 * Alteon AceDirector Trunks
14 * and probably many L2 switches ...
17 * ifconfig bond0 ipaddress netmask up
18 * will setup a network device, with an ip address. No mac address
19 * will be assigned at this time. The hw mac address will come from
20 * the first slave bonded to the channel. All slaves will then use
21 * this hw mac address.
24 * will release all slaves, marking them as down.
26 * ifenslave bond0 eth0
27 * will attach eth0 to bond0 as a slave. eth0 hw mac address will either
28 * a: be used as initial mac address
29 * b: if a hw mac address already is there, eth0's hw mac address
30 * will then be set from bond0.
34 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
36 #include <linux/kernel.h>
37 #include <linux/module.h>
38 #include <linux/types.h>
39 #include <linux/fcntl.h>
40 #include <linux/interrupt.h>
41 #include <linux/ptrace.h>
42 #include <linux/ioport.h>
46 #include <linux/tcp.h>
47 #include <linux/udp.h>
48 #include <linux/slab.h>
49 #include <linux/string.h>
50 #include <linux/init.h>
51 #include <linux/timer.h>
52 #include <linux/socket.h>
53 #include <linux/ctype.h>
54 #include <linux/inet.h>
55 #include <linux/bitops.h>
58 #include <linux/uaccess.h>
59 #include <linux/errno.h>
60 #include <linux/netdevice.h>
61 #include <linux/inetdevice.h>
62 #include <linux/igmp.h>
63 #include <linux/etherdevice.h>
64 #include <linux/skbuff.h>
66 #include <linux/rtnetlink.h>
67 #include <linux/smp.h>
68 #include <linux/if_ether.h>
70 #include <linux/mii.h>
71 #include <linux/ethtool.h>
72 #include <linux/if_vlan.h>
73 #include <linux/if_bonding.h>
74 #include <linux/jiffies.h>
75 #include <linux/preempt.h>
76 #include <net/route.h>
77 #include <net/net_namespace.h>
78 #include <net/netns/generic.h>
83 /*---------------------------- Module parameters ----------------------------*/
85 /* monitor all links that often (in milliseconds). <=0 disables monitoring */
86 #define BOND_LINK_MON_INTERV 0
87 #define BOND_LINK_ARP_INTERV 0
89 static int max_bonds
= BOND_DEFAULT_MAX_BONDS
;
90 static int tx_queues
= BOND_DEFAULT_TX_QUEUES
;
91 static int num_peer_notif
= 1;
92 static int miimon
= BOND_LINK_MON_INTERV
;
95 static int use_carrier
= 1;
98 static char *primary_reselect
;
99 static char *lacp_rate
;
100 static int min_links
;
101 static char *ad_select
;
102 static char *xmit_hash_policy
;
103 static int arp_interval
= BOND_LINK_ARP_INTERV
;
104 static char *arp_ip_target
[BOND_MAX_ARP_TARGETS
];
105 static char *arp_validate
;
106 static char *fail_over_mac
;
107 static int all_slaves_active
= 0;
108 static struct bond_params bonding_defaults
;
109 static int resend_igmp
= BOND_DEFAULT_RESEND_IGMP
;
111 module_param(max_bonds
, int, 0);
112 MODULE_PARM_DESC(max_bonds
, "Max number of bonded devices");
113 module_param(tx_queues
, int, 0);
114 MODULE_PARM_DESC(tx_queues
, "Max number of transmit queues (default = 16)");
115 module_param_named(num_grat_arp
, num_peer_notif
, int, 0644);
116 MODULE_PARM_DESC(num_grat_arp
, "Number of peer notifications to send on "
117 "failover event (alias of num_unsol_na)");
118 module_param_named(num_unsol_na
, num_peer_notif
, int, 0644);
119 MODULE_PARM_DESC(num_unsol_na
, "Number of peer notifications to send on "
120 "failover event (alias of num_grat_arp)");
121 module_param(miimon
, int, 0);
122 MODULE_PARM_DESC(miimon
, "Link check interval in milliseconds");
123 module_param(updelay
, int, 0);
124 MODULE_PARM_DESC(updelay
, "Delay before considering link up, in milliseconds");
125 module_param(downdelay
, int, 0);
126 MODULE_PARM_DESC(downdelay
, "Delay before considering link down, "
128 module_param(use_carrier
, int, 0);
129 MODULE_PARM_DESC(use_carrier
, "Use netif_carrier_ok (vs MII ioctls) in miimon; "
130 "0 for off, 1 for on (default)");
131 module_param(mode
, charp
, 0);
132 MODULE_PARM_DESC(mode
, "Mode of operation; 0 for balance-rr, "
133 "1 for active-backup, 2 for balance-xor, "
134 "3 for broadcast, 4 for 802.3ad, 5 for balance-tlb, "
135 "6 for balance-alb");
136 module_param(primary
, charp
, 0);
137 MODULE_PARM_DESC(primary
, "Primary network device to use");
138 module_param(primary_reselect
, charp
, 0);
139 MODULE_PARM_DESC(primary_reselect
, "Reselect primary slave "
141 "0 for always (default), "
142 "1 for only if speed of primary is "
144 "2 for only on active slave "
146 module_param(lacp_rate
, charp
, 0);
147 MODULE_PARM_DESC(lacp_rate
, "LACPDU tx rate to request from 802.3ad partner; "
148 "0 for slow, 1 for fast");
149 module_param(ad_select
, charp
, 0);
150 MODULE_PARM_DESC(ad_select
, "803.ad aggregation selection logic; "
151 "0 for stable (default), 1 for bandwidth, "
153 module_param(min_links
, int, 0);
154 MODULE_PARM_DESC(min_links
, "Minimum number of available links before turning on carrier");
156 module_param(xmit_hash_policy
, charp
, 0);
157 MODULE_PARM_DESC(xmit_hash_policy
, "balance-xor and 802.3ad hashing method; "
158 "0 for layer 2 (default), 1 for layer 3+4, "
160 module_param(arp_interval
, int, 0);
161 MODULE_PARM_DESC(arp_interval
, "arp interval in milliseconds");
162 module_param_array(arp_ip_target
, charp
, NULL
, 0);
163 MODULE_PARM_DESC(arp_ip_target
, "arp targets in n.n.n.n form");
164 module_param(arp_validate
, charp
, 0);
165 MODULE_PARM_DESC(arp_validate
, "validate src/dst of ARP probes; "
166 "0 for none (default), 1 for active, "
167 "2 for backup, 3 for all");
168 module_param(fail_over_mac
, charp
, 0);
169 MODULE_PARM_DESC(fail_over_mac
, "For active-backup, do not set all slaves to "
170 "the same MAC; 0 for none (default), "
171 "1 for active, 2 for follow");
172 module_param(all_slaves_active
, int, 0);
173 MODULE_PARM_DESC(all_slaves_active
, "Keep all frames received on an interface"
174 "by setting active flag for all slaves; "
175 "0 for never (default), 1 for always.");
176 module_param(resend_igmp
, int, 0);
177 MODULE_PARM_DESC(resend_igmp
, "Number of IGMP membership reports to send on "
180 /*----------------------------- Global variables ----------------------------*/
182 #ifdef CONFIG_NET_POLL_CONTROLLER
183 atomic_t netpoll_block_tx
= ATOMIC_INIT(0);
186 int bond_net_id __read_mostly
;
188 static __be32 arp_target
[BOND_MAX_ARP_TARGETS
];
189 static int arp_ip_count
;
190 static int bond_mode
= BOND_MODE_ROUNDROBIN
;
191 static int xmit_hashtype
= BOND_XMIT_POLICY_LAYER2
;
192 static int lacp_fast
;
194 const struct bond_parm_tbl bond_lacp_tbl
[] = {
195 { "slow", AD_LACP_SLOW
},
196 { "fast", AD_LACP_FAST
},
200 const struct bond_parm_tbl bond_mode_tbl
[] = {
201 { "balance-rr", BOND_MODE_ROUNDROBIN
},
202 { "active-backup", BOND_MODE_ACTIVEBACKUP
},
203 { "balance-xor", BOND_MODE_XOR
},
204 { "broadcast", BOND_MODE_BROADCAST
},
205 { "802.3ad", BOND_MODE_8023AD
},
206 { "balance-tlb", BOND_MODE_TLB
},
207 { "balance-alb", BOND_MODE_ALB
},
211 const struct bond_parm_tbl xmit_hashtype_tbl
[] = {
212 { "layer2", BOND_XMIT_POLICY_LAYER2
},
213 { "layer3+4", BOND_XMIT_POLICY_LAYER34
},
214 { "layer2+3", BOND_XMIT_POLICY_LAYER23
},
218 const struct bond_parm_tbl arp_validate_tbl
[] = {
219 { "none", BOND_ARP_VALIDATE_NONE
},
220 { "active", BOND_ARP_VALIDATE_ACTIVE
},
221 { "backup", BOND_ARP_VALIDATE_BACKUP
},
222 { "all", BOND_ARP_VALIDATE_ALL
},
226 const struct bond_parm_tbl fail_over_mac_tbl
[] = {
227 { "none", BOND_FOM_NONE
},
228 { "active", BOND_FOM_ACTIVE
},
229 { "follow", BOND_FOM_FOLLOW
},
233 const struct bond_parm_tbl pri_reselect_tbl
[] = {
234 { "always", BOND_PRI_RESELECT_ALWAYS
},
235 { "better", BOND_PRI_RESELECT_BETTER
},
236 { "failure", BOND_PRI_RESELECT_FAILURE
},
240 struct bond_parm_tbl ad_select_tbl
[] = {
241 { "stable", BOND_AD_STABLE
},
242 { "bandwidth", BOND_AD_BANDWIDTH
},
243 { "count", BOND_AD_COUNT
},
247 /*-------------------------- Forward declarations ---------------------------*/
249 static int bond_init(struct net_device
*bond_dev
);
250 static void bond_uninit(struct net_device
*bond_dev
);
252 /*---------------------------- General routines -----------------------------*/
254 const char *bond_mode_name(int mode
)
256 static const char *names
[] = {
257 [BOND_MODE_ROUNDROBIN
] = "load balancing (round-robin)",
258 [BOND_MODE_ACTIVEBACKUP
] = "fault-tolerance (active-backup)",
259 [BOND_MODE_XOR
] = "load balancing (xor)",
260 [BOND_MODE_BROADCAST
] = "fault-tolerance (broadcast)",
261 [BOND_MODE_8023AD
] = "IEEE 802.3ad Dynamic link aggregation",
262 [BOND_MODE_TLB
] = "transmit load balancing",
263 [BOND_MODE_ALB
] = "adaptive load balancing",
266 if (mode
< 0 || mode
> BOND_MODE_ALB
)
272 /*---------------------------------- VLAN -----------------------------------*/
275 * bond_add_vlan - add a new vlan id on bond
276 * @bond: bond that got the notification
277 * @vlan_id: the vlan id to add
279 * Returns -ENOMEM if allocation failed.
281 static int bond_add_vlan(struct bonding
*bond
, unsigned short vlan_id
)
283 struct vlan_entry
*vlan
;
285 pr_debug("bond: %s, vlan id %d\n",
286 (bond
? bond
->dev
->name
: "None"), vlan_id
);
288 vlan
= kzalloc(sizeof(struct vlan_entry
), GFP_KERNEL
);
292 INIT_LIST_HEAD(&vlan
->vlan_list
);
293 vlan
->vlan_id
= vlan_id
;
295 write_lock_bh(&bond
->lock
);
297 list_add_tail(&vlan
->vlan_list
, &bond
->vlan_list
);
299 write_unlock_bh(&bond
->lock
);
301 pr_debug("added VLAN ID %d on bond %s\n", vlan_id
, bond
->dev
->name
);
307 * bond_del_vlan - delete a vlan id from bond
308 * @bond: bond that got the notification
309 * @vlan_id: the vlan id to delete
311 * returns -ENODEV if @vlan_id was not found in @bond.
313 static int bond_del_vlan(struct bonding
*bond
, unsigned short vlan_id
)
315 struct vlan_entry
*vlan
;
318 pr_debug("bond: %s, vlan id %d\n", bond
->dev
->name
, vlan_id
);
321 write_lock_bh(&bond
->lock
);
323 list_for_each_entry(vlan
, &bond
->vlan_list
, vlan_list
) {
324 if (vlan
->vlan_id
== vlan_id
) {
325 list_del(&vlan
->vlan_list
);
327 if (bond_is_lb(bond
))
328 bond_alb_clear_vlan(bond
, vlan_id
);
330 pr_debug("removed VLAN ID %d from bond %s\n",
331 vlan_id
, bond
->dev
->name
);
340 pr_debug("couldn't find VLAN ID %d in bond %s\n",
341 vlan_id
, bond
->dev
->name
);
344 write_unlock_bh(&bond
->lock
);
345 unblock_netpoll_tx();
350 * bond_next_vlan - safely skip to the next item in the vlans list.
351 * @bond: the bond we're working on
352 * @curr: item we're advancing from
354 * Returns %NULL if list is empty, bond->next_vlan if @curr is %NULL,
355 * or @curr->next otherwise (even if it is @curr itself again).
357 * Caller must hold bond->lock
359 struct vlan_entry
*bond_next_vlan(struct bonding
*bond
, struct vlan_entry
*curr
)
361 struct vlan_entry
*next
, *last
;
363 if (list_empty(&bond
->vlan_list
))
367 next
= list_entry(bond
->vlan_list
.next
,
368 struct vlan_entry
, vlan_list
);
370 last
= list_entry(bond
->vlan_list
.prev
,
371 struct vlan_entry
, vlan_list
);
373 next
= list_entry(bond
->vlan_list
.next
,
374 struct vlan_entry
, vlan_list
);
376 next
= list_entry(curr
->vlan_list
.next
,
377 struct vlan_entry
, vlan_list
);
384 #define bond_queue_mapping(skb) (*(u16 *)((skb)->cb))
387 * bond_dev_queue_xmit - Prepare skb for xmit.
389 * @bond: bond device that got this skb for tx.
390 * @skb: hw accel VLAN tagged skb to transmit
391 * @slave_dev: slave that is supposed to xmit this skbuff
393 int bond_dev_queue_xmit(struct bonding
*bond
, struct sk_buff
*skb
,
394 struct net_device
*slave_dev
)
396 skb
->dev
= slave_dev
;
398 skb
->queue_mapping
= bond_queue_mapping(skb
);
400 if (unlikely(netpoll_tx_running(slave_dev
)))
401 bond_netpoll_send_skb(bond_get_slave_by_dev(bond
, slave_dev
), skb
);
409 * In the following 2 functions, bond_vlan_rx_add_vid and bond_vlan_rx_kill_vid,
410 * We don't protect the slave list iteration with a lock because:
411 * a. This operation is performed in IOCTL context,
412 * b. The operation is protected by the RTNL semaphore in the 8021q code,
413 * c. Holding a lock with BH disabled while directly calling a base driver
414 * entry point is generally a BAD idea.
416 * The design of synchronization/protection for this operation in the 8021q
417 * module is good for one or more VLAN devices over a single physical device
418 * and cannot be extended for a teaming solution like bonding, so there is a
419 * potential race condition here where a net device from the vlan group might
420 * be referenced (either by a base driver or the 8021q code) while it is being
421 * removed from the system. However, it turns out we're not making matters
422 * worse, and if it works for regular VLAN usage it will work here too.
426 * bond_vlan_rx_add_vid - Propagates adding an id to slaves
427 * @bond_dev: bonding net device that got called
428 * @vid: vlan id being added
430 static int bond_vlan_rx_add_vid(struct net_device
*bond_dev
, uint16_t vid
)
432 struct bonding
*bond
= netdev_priv(bond_dev
);
433 struct slave
*slave
, *stop_at
;
436 bond_for_each_slave(bond
, slave
, i
) {
437 res
= vlan_vid_add(slave
->dev
, vid
);
442 res
= bond_add_vlan(bond
, vid
);
444 pr_err("%s: Error: Failed to add vlan id %d\n",
445 bond_dev
->name
, vid
);
452 /* unwind from head to the slave that failed */
454 bond_for_each_slave_from_to(bond
, slave
, i
, bond
->first_slave
, stop_at
)
455 vlan_vid_del(slave
->dev
, vid
);
461 * bond_vlan_rx_kill_vid - Propagates deleting an id to slaves
462 * @bond_dev: bonding net device that got called
463 * @vid: vlan id being removed
465 static int bond_vlan_rx_kill_vid(struct net_device
*bond_dev
, uint16_t vid
)
467 struct bonding
*bond
= netdev_priv(bond_dev
);
471 bond_for_each_slave(bond
, slave
, i
)
472 vlan_vid_del(slave
->dev
, vid
);
474 res
= bond_del_vlan(bond
, vid
);
476 pr_err("%s: Error: Failed to remove vlan id %d\n",
477 bond_dev
->name
, vid
);
484 static void bond_add_vlans_on_slave(struct bonding
*bond
, struct net_device
*slave_dev
)
486 struct vlan_entry
*vlan
;
489 list_for_each_entry(vlan
, &bond
->vlan_list
, vlan_list
) {
490 res
= vlan_vid_add(slave_dev
, vlan
->vlan_id
);
492 pr_warning("%s: Failed to add vlan id %d to device %s\n",
493 bond
->dev
->name
, vlan
->vlan_id
,
498 static void bond_del_vlans_from_slave(struct bonding
*bond
,
499 struct net_device
*slave_dev
)
501 struct vlan_entry
*vlan
;
503 list_for_each_entry(vlan
, &bond
->vlan_list
, vlan_list
) {
506 vlan_vid_del(slave_dev
, vlan
->vlan_id
);
510 /*------------------------------- Link status -------------------------------*/
513 * Set the carrier state for the master according to the state of its
514 * slaves. If any slaves are up, the master is up. In 802.3ad mode,
515 * do special 802.3ad magic.
517 * Returns zero if carrier state does not change, nonzero if it does.
519 static int bond_set_carrier(struct bonding
*bond
)
524 if (bond
->slave_cnt
== 0)
527 if (bond
->params
.mode
== BOND_MODE_8023AD
)
528 return bond_3ad_set_carrier(bond
);
530 bond_for_each_slave(bond
, slave
, i
) {
531 if (slave
->link
== BOND_LINK_UP
) {
532 if (!netif_carrier_ok(bond
->dev
)) {
533 netif_carrier_on(bond
->dev
);
541 if (netif_carrier_ok(bond
->dev
)) {
542 netif_carrier_off(bond
->dev
);
549 * Get link speed and duplex from the slave's base driver
550 * using ethtool. If for some reason the call fails or the
551 * values are invalid, set speed and duplex to -1,
554 static void bond_update_speed_duplex(struct slave
*slave
)
556 struct net_device
*slave_dev
= slave
->dev
;
557 struct ethtool_cmd ecmd
;
561 slave
->speed
= SPEED_UNKNOWN
;
562 slave
->duplex
= DUPLEX_UNKNOWN
;
564 res
= __ethtool_get_settings(slave_dev
, &ecmd
);
568 slave_speed
= ethtool_cmd_speed(&ecmd
);
569 if (slave_speed
== 0 || slave_speed
== ((__u32
) -1))
572 switch (ecmd
.duplex
) {
580 slave
->speed
= slave_speed
;
581 slave
->duplex
= ecmd
.duplex
;
587 * if <dev> supports MII link status reporting, check its link status.
589 * We either do MII/ETHTOOL ioctls, or check netif_carrier_ok(),
590 * depending upon the setting of the use_carrier parameter.
592 * Return either BMSR_LSTATUS, meaning that the link is up (or we
593 * can't tell and just pretend it is), or 0, meaning that the link is
596 * If reporting is non-zero, instead of faking link up, return -1 if
597 * both ETHTOOL and MII ioctls fail (meaning the device does not
598 * support them). If use_carrier is set, return whatever it says.
599 * It'd be nice if there was a good way to tell if a driver supports
600 * netif_carrier, but there really isn't.
602 static int bond_check_dev_link(struct bonding
*bond
,
603 struct net_device
*slave_dev
, int reporting
)
605 const struct net_device_ops
*slave_ops
= slave_dev
->netdev_ops
;
606 int (*ioctl
)(struct net_device
*, struct ifreq
*, int);
608 struct mii_ioctl_data
*mii
;
610 if (!reporting
&& !netif_running(slave_dev
))
613 if (bond
->params
.use_carrier
)
614 return netif_carrier_ok(slave_dev
) ? BMSR_LSTATUS
: 0;
616 /* Try to get link status using Ethtool first. */
617 if (slave_dev
->ethtool_ops
) {
618 if (slave_dev
->ethtool_ops
->get_link
) {
621 link
= slave_dev
->ethtool_ops
->get_link(slave_dev
);
623 return link
? BMSR_LSTATUS
: 0;
627 /* Ethtool can't be used, fallback to MII ioctls. */
628 ioctl
= slave_ops
->ndo_do_ioctl
;
630 /* TODO: set pointer to correct ioctl on a per team member */
631 /* bases to make this more efficient. that is, once */
632 /* we determine the correct ioctl, we will always */
633 /* call it and not the others for that team */
637 * We cannot assume that SIOCGMIIPHY will also read a
638 * register; not all network drivers (e.g., e100)
642 /* Yes, the mii is overlaid on the ifreq.ifr_ifru */
643 strncpy(ifr
.ifr_name
, slave_dev
->name
, IFNAMSIZ
);
645 if (IOCTL(slave_dev
, &ifr
, SIOCGMIIPHY
) == 0) {
646 mii
->reg_num
= MII_BMSR
;
647 if (IOCTL(slave_dev
, &ifr
, SIOCGMIIREG
) == 0)
648 return mii
->val_out
& BMSR_LSTATUS
;
653 * If reporting, report that either there's no dev->do_ioctl,
654 * or both SIOCGMIIREG and get_link failed (meaning that we
655 * cannot report link status). If not reporting, pretend
658 return reporting
? -1 : BMSR_LSTATUS
;
661 /*----------------------------- Multicast list ------------------------------*/
664 * Push the promiscuity flag down to appropriate slaves
666 static int bond_set_promiscuity(struct bonding
*bond
, int inc
)
669 if (USES_PRIMARY(bond
->params
.mode
)) {
670 /* write lock already acquired */
671 if (bond
->curr_active_slave
) {
672 err
= dev_set_promiscuity(bond
->curr_active_slave
->dev
,
678 bond_for_each_slave(bond
, slave
, i
) {
679 err
= dev_set_promiscuity(slave
->dev
, inc
);
688 * Push the allmulti flag down to all slaves
690 static int bond_set_allmulti(struct bonding
*bond
, int inc
)
693 if (USES_PRIMARY(bond
->params
.mode
)) {
694 /* write lock already acquired */
695 if (bond
->curr_active_slave
) {
696 err
= dev_set_allmulti(bond
->curr_active_slave
->dev
,
702 bond_for_each_slave(bond
, slave
, i
) {
703 err
= dev_set_allmulti(slave
->dev
, inc
);
712 * Add a Multicast address to slaves
715 static void bond_mc_add(struct bonding
*bond
, void *addr
)
717 if (USES_PRIMARY(bond
->params
.mode
)) {
718 /* write lock already acquired */
719 if (bond
->curr_active_slave
)
720 dev_mc_add(bond
->curr_active_slave
->dev
, addr
);
725 bond_for_each_slave(bond
, slave
, i
)
726 dev_mc_add(slave
->dev
, addr
);
731 * Remove a multicast address from slave
734 static void bond_mc_del(struct bonding
*bond
, void *addr
)
736 if (USES_PRIMARY(bond
->params
.mode
)) {
737 /* write lock already acquired */
738 if (bond
->curr_active_slave
)
739 dev_mc_del(bond
->curr_active_slave
->dev
, addr
);
743 bond_for_each_slave(bond
, slave
, i
) {
744 dev_mc_del(slave
->dev
, addr
);
750 static void __bond_resend_igmp_join_requests(struct net_device
*dev
)
752 struct in_device
*in_dev
;
755 in_dev
= __in_dev_get_rcu(dev
);
757 ip_mc_rejoin_groups(in_dev
);
762 * Retrieve the list of registered multicast addresses for the bonding
763 * device and retransmit an IGMP JOIN request to the current active
766 static void bond_resend_igmp_join_requests(struct bonding
*bond
)
768 struct net_device
*bond_dev
, *vlan_dev
, *master_dev
;
769 struct vlan_entry
*vlan
;
771 read_lock(&bond
->lock
);
773 bond_dev
= bond
->dev
;
775 /* rejoin all groups on bond device */
776 __bond_resend_igmp_join_requests(bond_dev
);
779 * if bond is enslaved to a bridge,
780 * then rejoin all groups on its master
782 master_dev
= bond_dev
->master
;
784 if ((master_dev
->priv_flags
& IFF_EBRIDGE
)
785 && (bond_dev
->priv_flags
& IFF_BRIDGE_PORT
))
786 __bond_resend_igmp_join_requests(master_dev
);
788 /* rejoin all groups on vlan devices */
789 list_for_each_entry(vlan
, &bond
->vlan_list
, vlan_list
) {
791 vlan_dev
= __vlan_find_dev_deep(bond_dev
,
795 __bond_resend_igmp_join_requests(vlan_dev
);
798 if (--bond
->igmp_retrans
> 0)
799 queue_delayed_work(bond
->wq
, &bond
->mcast_work
, HZ
/5);
801 read_unlock(&bond
->lock
);
804 static void bond_resend_igmp_join_requests_delayed(struct work_struct
*work
)
806 struct bonding
*bond
= container_of(work
, struct bonding
,
808 bond_resend_igmp_join_requests(bond
);
812 * flush all members of flush->mc_list from device dev->mc_list
814 static void bond_mc_list_flush(struct net_device
*bond_dev
,
815 struct net_device
*slave_dev
)
817 struct bonding
*bond
= netdev_priv(bond_dev
);
818 struct netdev_hw_addr
*ha
;
820 netdev_for_each_mc_addr(ha
, bond_dev
)
821 dev_mc_del(slave_dev
, ha
->addr
);
823 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
824 /* del lacpdu mc addr from mc list */
825 u8 lacpdu_multicast
[ETH_ALEN
] = MULTICAST_LACPDU_ADDR
;
827 dev_mc_del(slave_dev
, lacpdu_multicast
);
831 /*--------------------------- Active slave change ---------------------------*/
834 * Update the mc list and multicast-related flags for the new and
835 * old active slaves (if any) according to the multicast mode, and
836 * promiscuous flags unconditionally.
838 static void bond_mc_swap(struct bonding
*bond
, struct slave
*new_active
,
839 struct slave
*old_active
)
841 struct netdev_hw_addr
*ha
;
843 if (!USES_PRIMARY(bond
->params
.mode
))
844 /* nothing to do - mc list is already up-to-date on
850 if (bond
->dev
->flags
& IFF_PROMISC
)
851 dev_set_promiscuity(old_active
->dev
, -1);
853 if (bond
->dev
->flags
& IFF_ALLMULTI
)
854 dev_set_allmulti(old_active
->dev
, -1);
856 netdev_for_each_mc_addr(ha
, bond
->dev
)
857 dev_mc_del(old_active
->dev
, ha
->addr
);
861 /* FIXME: Signal errors upstream. */
862 if (bond
->dev
->flags
& IFF_PROMISC
)
863 dev_set_promiscuity(new_active
->dev
, 1);
865 if (bond
->dev
->flags
& IFF_ALLMULTI
)
866 dev_set_allmulti(new_active
->dev
, 1);
868 netdev_for_each_mc_addr(ha
, bond
->dev
)
869 dev_mc_add(new_active
->dev
, ha
->addr
);
874 * bond_do_fail_over_mac
876 * Perform special MAC address swapping for fail_over_mac settings
878 * Called with RTNL, bond->lock for read, curr_slave_lock for write_bh.
880 static void bond_do_fail_over_mac(struct bonding
*bond
,
881 struct slave
*new_active
,
882 struct slave
*old_active
)
883 __releases(&bond
->curr_slave_lock
)
884 __releases(&bond
->lock
)
885 __acquires(&bond
->lock
)
886 __acquires(&bond
->curr_slave_lock
)
888 u8 tmp_mac
[ETH_ALEN
];
889 struct sockaddr saddr
;
892 switch (bond
->params
.fail_over_mac
) {
893 case BOND_FOM_ACTIVE
:
895 memcpy(bond
->dev
->dev_addr
, new_active
->dev
->dev_addr
,
896 new_active
->dev
->addr_len
);
897 write_unlock_bh(&bond
->curr_slave_lock
);
898 read_unlock(&bond
->lock
);
899 call_netdevice_notifiers(NETDEV_CHANGEADDR
, bond
->dev
);
900 read_lock(&bond
->lock
);
901 write_lock_bh(&bond
->curr_slave_lock
);
904 case BOND_FOM_FOLLOW
:
906 * if new_active && old_active, swap them
907 * if just old_active, do nothing (going to no active slave)
908 * if just new_active, set new_active to bond's MAC
913 write_unlock_bh(&bond
->curr_slave_lock
);
914 read_unlock(&bond
->lock
);
917 memcpy(tmp_mac
, new_active
->dev
->dev_addr
, ETH_ALEN
);
918 memcpy(saddr
.sa_data
, old_active
->dev
->dev_addr
,
920 saddr
.sa_family
= new_active
->dev
->type
;
922 memcpy(saddr
.sa_data
, bond
->dev
->dev_addr
, ETH_ALEN
);
923 saddr
.sa_family
= bond
->dev
->type
;
926 rv
= dev_set_mac_address(new_active
->dev
, &saddr
);
928 pr_err("%s: Error %d setting MAC of slave %s\n",
929 bond
->dev
->name
, -rv
, new_active
->dev
->name
);
936 memcpy(saddr
.sa_data
, tmp_mac
, ETH_ALEN
);
937 saddr
.sa_family
= old_active
->dev
->type
;
939 rv
= dev_set_mac_address(old_active
->dev
, &saddr
);
941 pr_err("%s: Error %d setting MAC of slave %s\n",
942 bond
->dev
->name
, -rv
, new_active
->dev
->name
);
944 read_lock(&bond
->lock
);
945 write_lock_bh(&bond
->curr_slave_lock
);
948 pr_err("%s: bond_do_fail_over_mac impossible: bad policy %d\n",
949 bond
->dev
->name
, bond
->params
.fail_over_mac
);
955 static bool bond_should_change_active(struct bonding
*bond
)
957 struct slave
*prim
= bond
->primary_slave
;
958 struct slave
*curr
= bond
->curr_active_slave
;
960 if (!prim
|| !curr
|| curr
->link
!= BOND_LINK_UP
)
962 if (bond
->force_primary
) {
963 bond
->force_primary
= false;
966 if (bond
->params
.primary_reselect
== BOND_PRI_RESELECT_BETTER
&&
967 (prim
->speed
< curr
->speed
||
968 (prim
->speed
== curr
->speed
&& prim
->duplex
<= curr
->duplex
)))
970 if (bond
->params
.primary_reselect
== BOND_PRI_RESELECT_FAILURE
)
976 * find_best_interface - select the best available slave to be the active one
977 * @bond: our bonding struct
979 * Warning: Caller must hold curr_slave_lock for writing.
981 static struct slave
*bond_find_best_slave(struct bonding
*bond
)
983 struct slave
*new_active
, *old_active
;
984 struct slave
*bestslave
= NULL
;
985 int mintime
= bond
->params
.updelay
;
988 new_active
= bond
->curr_active_slave
;
990 if (!new_active
) { /* there were no active slaves left */
991 if (bond
->slave_cnt
> 0) /* found one slave */
992 new_active
= bond
->first_slave
;
994 return NULL
; /* still no slave, return NULL */
997 if ((bond
->primary_slave
) &&
998 bond
->primary_slave
->link
== BOND_LINK_UP
&&
999 bond_should_change_active(bond
)) {
1000 new_active
= bond
->primary_slave
;
1003 /* remember where to stop iterating over the slaves */
1004 old_active
= new_active
;
1006 bond_for_each_slave_from(bond
, new_active
, i
, old_active
) {
1007 if (new_active
->link
== BOND_LINK_UP
) {
1009 } else if (new_active
->link
== BOND_LINK_BACK
&&
1010 IS_UP(new_active
->dev
)) {
1011 /* link up, but waiting for stabilization */
1012 if (new_active
->delay
< mintime
) {
1013 mintime
= new_active
->delay
;
1014 bestslave
= new_active
;
1022 static bool bond_should_notify_peers(struct bonding
*bond
)
1024 struct slave
*slave
= bond
->curr_active_slave
;
1026 pr_debug("bond_should_notify_peers: bond %s slave %s\n",
1027 bond
->dev
->name
, slave
? slave
->dev
->name
: "NULL");
1029 if (!slave
|| !bond
->send_peer_notif
||
1030 test_bit(__LINK_STATE_LINKWATCH_PENDING
, &slave
->dev
->state
))
1033 bond
->send_peer_notif
--;
1038 * change_active_interface - change the active slave into the specified one
1039 * @bond: our bonding struct
1040 * @new: the new slave to make the active one
1042 * Set the new slave to the bond's settings and unset them on the old
1043 * curr_active_slave.
1044 * Setting include flags, mc-list, promiscuity, allmulti, etc.
1046 * If @new's link state is %BOND_LINK_BACK we'll set it to %BOND_LINK_UP,
1047 * because it is apparently the best available slave we have, even though its
1048 * updelay hasn't timed out yet.
1050 * If new_active is not NULL, caller must hold bond->lock for read and
1051 * curr_slave_lock for write_bh.
1053 void bond_change_active_slave(struct bonding
*bond
, struct slave
*new_active
)
1055 struct slave
*old_active
= bond
->curr_active_slave
;
1057 if (old_active
== new_active
)
1061 new_active
->jiffies
= jiffies
;
1063 if (new_active
->link
== BOND_LINK_BACK
) {
1064 if (USES_PRIMARY(bond
->params
.mode
)) {
1065 pr_info("%s: making interface %s the new active one %d ms earlier.\n",
1066 bond
->dev
->name
, new_active
->dev
->name
,
1067 (bond
->params
.updelay
- new_active
->delay
) * bond
->params
.miimon
);
1070 new_active
->delay
= 0;
1071 new_active
->link
= BOND_LINK_UP
;
1073 if (bond
->params
.mode
== BOND_MODE_8023AD
)
1074 bond_3ad_handle_link_change(new_active
, BOND_LINK_UP
);
1076 if (bond_is_lb(bond
))
1077 bond_alb_handle_link_change(bond
, new_active
, BOND_LINK_UP
);
1079 if (USES_PRIMARY(bond
->params
.mode
)) {
1080 pr_info("%s: making interface %s the new active one.\n",
1081 bond
->dev
->name
, new_active
->dev
->name
);
1086 if (USES_PRIMARY(bond
->params
.mode
))
1087 bond_mc_swap(bond
, new_active
, old_active
);
1089 if (bond_is_lb(bond
)) {
1090 bond_alb_handle_active_change(bond
, new_active
);
1092 bond_set_slave_inactive_flags(old_active
);
1094 bond_set_slave_active_flags(new_active
);
1096 bond
->curr_active_slave
= new_active
;
1099 if (bond
->params
.mode
== BOND_MODE_ACTIVEBACKUP
) {
1101 bond_set_slave_inactive_flags(old_active
);
1104 bool should_notify_peers
= false;
1106 bond_set_slave_active_flags(new_active
);
1108 if (bond
->params
.fail_over_mac
)
1109 bond_do_fail_over_mac(bond
, new_active
,
1112 if (netif_running(bond
->dev
)) {
1113 bond
->send_peer_notif
=
1114 bond
->params
.num_peer_notif
;
1115 should_notify_peers
=
1116 bond_should_notify_peers(bond
);
1119 write_unlock_bh(&bond
->curr_slave_lock
);
1120 read_unlock(&bond
->lock
);
1122 netdev_bonding_change(bond
->dev
, NETDEV_BONDING_FAILOVER
);
1123 if (should_notify_peers
)
1124 netdev_bonding_change(bond
->dev
,
1125 NETDEV_NOTIFY_PEERS
);
1127 read_lock(&bond
->lock
);
1128 write_lock_bh(&bond
->curr_slave_lock
);
1132 /* resend IGMP joins since active slave has changed or
1133 * all were sent on curr_active_slave.
1134 * resend only if bond is brought up with the affected
1135 * bonding modes and the retransmission is enabled */
1136 if (netif_running(bond
->dev
) && (bond
->params
.resend_igmp
> 0) &&
1137 ((USES_PRIMARY(bond
->params
.mode
) && new_active
) ||
1138 bond
->params
.mode
== BOND_MODE_ROUNDROBIN
)) {
1139 bond
->igmp_retrans
= bond
->params
.resend_igmp
;
1140 queue_delayed_work(bond
->wq
, &bond
->mcast_work
, 0);
1145 * bond_select_active_slave - select a new active slave, if needed
1146 * @bond: our bonding struct
1148 * This functions should be called when one of the following occurs:
1149 * - The old curr_active_slave has been released or lost its link.
1150 * - The primary_slave has got its link back.
1151 * - A slave has got its link back and there's no old curr_active_slave.
1153 * Caller must hold bond->lock for read and curr_slave_lock for write_bh.
1155 void bond_select_active_slave(struct bonding
*bond
)
1157 struct slave
*best_slave
;
1160 best_slave
= bond_find_best_slave(bond
);
1161 if (best_slave
!= bond
->curr_active_slave
) {
1162 bond_change_active_slave(bond
, best_slave
);
1163 rv
= bond_set_carrier(bond
);
1167 if (netif_carrier_ok(bond
->dev
)) {
1168 pr_info("%s: first active interface up!\n",
1171 pr_info("%s: now running without any active interface !\n",
1177 /*--------------------------- slave list handling ---------------------------*/
1180 * This function attaches the slave to the end of list.
1182 * bond->lock held for writing by caller.
1184 static void bond_attach_slave(struct bonding
*bond
, struct slave
*new_slave
)
1186 if (bond
->first_slave
== NULL
) { /* attaching the first slave */
1187 new_slave
->next
= new_slave
;
1188 new_slave
->prev
= new_slave
;
1189 bond
->first_slave
= new_slave
;
1191 new_slave
->next
= bond
->first_slave
;
1192 new_slave
->prev
= bond
->first_slave
->prev
;
1193 new_slave
->next
->prev
= new_slave
;
1194 new_slave
->prev
->next
= new_slave
;
1201 * This function detaches the slave from the list.
1202 * WARNING: no check is made to verify if the slave effectively
1203 * belongs to <bond>.
1204 * Nothing is freed on return, structures are just unchained.
1205 * If any slave pointer in bond was pointing to <slave>,
1206 * it should be changed by the calling function.
1208 * bond->lock held for writing by caller.
1210 static void bond_detach_slave(struct bonding
*bond
, struct slave
*slave
)
1213 slave
->next
->prev
= slave
->prev
;
1216 slave
->prev
->next
= slave
->next
;
1218 if (bond
->first_slave
== slave
) { /* slave is the first slave */
1219 if (bond
->slave_cnt
> 1) { /* there are more slave */
1220 bond
->first_slave
= slave
->next
;
1222 bond
->first_slave
= NULL
; /* slave was the last one */
1231 #ifdef CONFIG_NET_POLL_CONTROLLER
1232 static inline int slave_enable_netpoll(struct slave
*slave
)
1237 np
= kzalloc(sizeof(*np
), GFP_KERNEL
);
1242 np
->dev
= slave
->dev
;
1243 strlcpy(np
->dev_name
, slave
->dev
->name
, IFNAMSIZ
);
1244 err
= __netpoll_setup(np
);
1253 static inline void slave_disable_netpoll(struct slave
*slave
)
1255 struct netpoll
*np
= slave
->np
;
1261 synchronize_rcu_bh();
1262 __netpoll_cleanup(np
);
1265 static inline bool slave_dev_support_netpoll(struct net_device
*slave_dev
)
1267 if (slave_dev
->priv_flags
& IFF_DISABLE_NETPOLL
)
1269 if (!slave_dev
->netdev_ops
->ndo_poll_controller
)
1274 static void bond_poll_controller(struct net_device
*bond_dev
)
1278 static void __bond_netpoll_cleanup(struct bonding
*bond
)
1280 struct slave
*slave
;
1283 bond_for_each_slave(bond
, slave
, i
)
1284 if (IS_UP(slave
->dev
))
1285 slave_disable_netpoll(slave
);
1287 static void bond_netpoll_cleanup(struct net_device
*bond_dev
)
1289 struct bonding
*bond
= netdev_priv(bond_dev
);
1291 read_lock(&bond
->lock
);
1292 __bond_netpoll_cleanup(bond
);
1293 read_unlock(&bond
->lock
);
1296 static int bond_netpoll_setup(struct net_device
*dev
, struct netpoll_info
*ni
)
1298 struct bonding
*bond
= netdev_priv(dev
);
1299 struct slave
*slave
;
1302 read_lock(&bond
->lock
);
1303 bond_for_each_slave(bond
, slave
, i
) {
1304 err
= slave_enable_netpoll(slave
);
1306 __bond_netpoll_cleanup(bond
);
1310 read_unlock(&bond
->lock
);
1314 static struct netpoll_info
*bond_netpoll_info(struct bonding
*bond
)
1316 return bond
->dev
->npinfo
;
1320 static inline int slave_enable_netpoll(struct slave
*slave
)
1324 static inline void slave_disable_netpoll(struct slave
*slave
)
1327 static void bond_netpoll_cleanup(struct net_device
*bond_dev
)
1332 /*---------------------------------- IOCTL ----------------------------------*/
1334 static int bond_sethwaddr(struct net_device
*bond_dev
,
1335 struct net_device
*slave_dev
)
1337 pr_debug("bond_dev=%p\n", bond_dev
);
1338 pr_debug("slave_dev=%p\n", slave_dev
);
1339 pr_debug("slave_dev->addr_len=%d\n", slave_dev
->addr_len
);
1340 memcpy(bond_dev
->dev_addr
, slave_dev
->dev_addr
, slave_dev
->addr_len
);
1344 static netdev_features_t
bond_fix_features(struct net_device
*dev
,
1345 netdev_features_t features
)
1347 struct slave
*slave
;
1348 struct bonding
*bond
= netdev_priv(dev
);
1349 netdev_features_t mask
;
1352 read_lock(&bond
->lock
);
1354 if (!bond
->first_slave
) {
1355 /* Disable adding VLANs to empty bond. But why? --mq */
1356 features
|= NETIF_F_VLAN_CHALLENGED
;
1361 features
&= ~NETIF_F_ONE_FOR_ALL
;
1362 features
|= NETIF_F_ALL_FOR_ALL
;
1364 bond_for_each_slave(bond
, slave
, i
) {
1365 features
= netdev_increment_features(features
,
1366 slave
->dev
->features
,
1371 read_unlock(&bond
->lock
);
1375 #define BOND_VLAN_FEATURES (NETIF_F_ALL_CSUM | NETIF_F_SG | \
1376 NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
1377 NETIF_F_HIGHDMA | NETIF_F_LRO)
1379 static void bond_compute_features(struct bonding
*bond
)
1381 struct slave
*slave
;
1382 struct net_device
*bond_dev
= bond
->dev
;
1383 netdev_features_t vlan_features
= BOND_VLAN_FEATURES
;
1384 unsigned short max_hard_header_len
= ETH_HLEN
;
1387 read_lock(&bond
->lock
);
1389 if (!bond
->first_slave
)
1392 bond_for_each_slave(bond
, slave
, i
) {
1393 vlan_features
= netdev_increment_features(vlan_features
,
1394 slave
->dev
->vlan_features
, BOND_VLAN_FEATURES
);
1396 if (slave
->dev
->hard_header_len
> max_hard_header_len
)
1397 max_hard_header_len
= slave
->dev
->hard_header_len
;
1401 bond_dev
->vlan_features
= vlan_features
;
1402 bond_dev
->hard_header_len
= max_hard_header_len
;
1404 read_unlock(&bond
->lock
);
1406 netdev_change_features(bond_dev
);
1409 static void bond_setup_by_slave(struct net_device
*bond_dev
,
1410 struct net_device
*slave_dev
)
1412 struct bonding
*bond
= netdev_priv(bond_dev
);
1414 bond_dev
->header_ops
= slave_dev
->header_ops
;
1416 bond_dev
->type
= slave_dev
->type
;
1417 bond_dev
->hard_header_len
= slave_dev
->hard_header_len
;
1418 bond_dev
->addr_len
= slave_dev
->addr_len
;
1420 memcpy(bond_dev
->broadcast
, slave_dev
->broadcast
,
1421 slave_dev
->addr_len
);
1422 bond
->setup_by_slave
= 1;
1425 /* On bonding slaves other than the currently active slave, suppress
1426 * duplicates except for alb non-mcast/bcast.
1428 static bool bond_should_deliver_exact_match(struct sk_buff
*skb
,
1429 struct slave
*slave
,
1430 struct bonding
*bond
)
1432 if (bond_is_slave_inactive(slave
)) {
1433 if (bond
->params
.mode
== BOND_MODE_ALB
&&
1434 skb
->pkt_type
!= PACKET_BROADCAST
&&
1435 skb
->pkt_type
!= PACKET_MULTICAST
)
1442 static rx_handler_result_t
bond_handle_frame(struct sk_buff
**pskb
)
1444 struct sk_buff
*skb
= *pskb
;
1445 struct slave
*slave
;
1446 struct bonding
*bond
;
1447 int (*recv_probe
)(struct sk_buff
*, struct bonding
*,
1449 int ret
= RX_HANDLER_ANOTHER
;
1451 skb
= skb_share_check(skb
, GFP_ATOMIC
);
1453 return RX_HANDLER_CONSUMED
;
1457 slave
= bond_slave_get_rcu(skb
->dev
);
1460 if (bond
->params
.arp_interval
)
1461 slave
->dev
->last_rx
= jiffies
;
1463 recv_probe
= ACCESS_ONCE(bond
->recv_probe
);
1465 struct sk_buff
*nskb
= skb_clone(skb
, GFP_ATOMIC
);
1468 ret
= recv_probe(nskb
, bond
, slave
);
1469 dev_kfree_skb(nskb
);
1470 if (ret
== RX_HANDLER_CONSUMED
) {
1477 if (bond_should_deliver_exact_match(skb
, slave
, bond
)) {
1478 return RX_HANDLER_EXACT
;
1481 skb
->dev
= bond
->dev
;
1483 if (bond
->params
.mode
== BOND_MODE_ALB
&&
1484 bond
->dev
->priv_flags
& IFF_BRIDGE_PORT
&&
1485 skb
->pkt_type
== PACKET_HOST
) {
1487 if (unlikely(skb_cow_head(skb
,
1488 skb
->data
- skb_mac_header(skb
)))) {
1490 return RX_HANDLER_CONSUMED
;
1492 memcpy(eth_hdr(skb
)->h_dest
, bond
->dev
->dev_addr
, ETH_ALEN
);
1498 /* enslave device <slave> to bond device <master> */
1499 int bond_enslave(struct net_device
*bond_dev
, struct net_device
*slave_dev
)
1501 struct bonding
*bond
= netdev_priv(bond_dev
);
1502 const struct net_device_ops
*slave_ops
= slave_dev
->netdev_ops
;
1503 struct slave
*new_slave
= NULL
;
1504 struct netdev_hw_addr
*ha
;
1505 struct sockaddr addr
;
1509 if (!bond
->params
.use_carrier
&& slave_dev
->ethtool_ops
== NULL
&&
1510 slave_ops
->ndo_do_ioctl
== NULL
) {
1511 pr_warning("%s: Warning: no link monitoring support for %s\n",
1512 bond_dev
->name
, slave_dev
->name
);
1515 /* already enslaved */
1516 if (slave_dev
->flags
& IFF_SLAVE
) {
1517 pr_debug("Error, Device was already enslaved\n");
1521 /* vlan challenged mutual exclusion */
1522 /* no need to lock since we're protected by rtnl_lock */
1523 if (slave_dev
->features
& NETIF_F_VLAN_CHALLENGED
) {
1524 pr_debug("%s: NETIF_F_VLAN_CHALLENGED\n", slave_dev
->name
);
1525 if (bond_vlan_used(bond
)) {
1526 pr_err("%s: Error: cannot enslave VLAN challenged slave %s on VLAN enabled bond %s\n",
1527 bond_dev
->name
, slave_dev
->name
, bond_dev
->name
);
1530 pr_warning("%s: Warning: enslaved VLAN challenged slave %s. Adding VLANs will be blocked as long as %s is part of bond %s\n",
1531 bond_dev
->name
, slave_dev
->name
,
1532 slave_dev
->name
, bond_dev
->name
);
1535 pr_debug("%s: ! NETIF_F_VLAN_CHALLENGED\n", slave_dev
->name
);
1539 * Old ifenslave binaries are no longer supported. These can
1540 * be identified with moderate accuracy by the state of the slave:
1541 * the current ifenslave will set the interface down prior to
1542 * enslaving it; the old ifenslave will not.
1544 if ((slave_dev
->flags
& IFF_UP
)) {
1545 pr_err("%s is up. This may be due to an out of date ifenslave.\n",
1548 goto err_undo_flags
;
1551 /* set bonding device ether type by slave - bonding netdevices are
1552 * created with ether_setup, so when the slave type is not ARPHRD_ETHER
1553 * there is a need to override some of the type dependent attribs/funcs.
1555 * bond ether type mutual exclusion - don't allow slaves of dissimilar
1556 * ether type (eg ARPHRD_ETHER and ARPHRD_INFINIBAND) share the same bond
1558 if (bond
->slave_cnt
== 0) {
1559 if (bond_dev
->type
!= slave_dev
->type
) {
1560 pr_debug("%s: change device type from %d to %d\n",
1562 bond_dev
->type
, slave_dev
->type
);
1564 res
= netdev_bonding_change(bond_dev
,
1565 NETDEV_PRE_TYPE_CHANGE
);
1566 res
= notifier_to_errno(res
);
1568 pr_err("%s: refused to change device type\n",
1571 goto err_undo_flags
;
1574 /* Flush unicast and multicast addresses */
1575 dev_uc_flush(bond_dev
);
1576 dev_mc_flush(bond_dev
);
1578 if (slave_dev
->type
!= ARPHRD_ETHER
)
1579 bond_setup_by_slave(bond_dev
, slave_dev
);
1581 ether_setup(bond_dev
);
1582 bond_dev
->priv_flags
&= ~IFF_TX_SKB_SHARING
;
1585 netdev_bonding_change(bond_dev
,
1586 NETDEV_POST_TYPE_CHANGE
);
1588 } else if (bond_dev
->type
!= slave_dev
->type
) {
1589 pr_err("%s ether type (%d) is different from other slaves (%d), can not enslave it.\n",
1591 slave_dev
->type
, bond_dev
->type
);
1593 goto err_undo_flags
;
1596 if (slave_ops
->ndo_set_mac_address
== NULL
) {
1597 if (bond
->slave_cnt
== 0) {
1598 pr_warning("%s: Warning: The first slave device specified does not support setting the MAC address. Setting fail_over_mac to active.",
1600 bond
->params
.fail_over_mac
= BOND_FOM_ACTIVE
;
1601 } else if (bond
->params
.fail_over_mac
!= BOND_FOM_ACTIVE
) {
1602 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",
1605 goto err_undo_flags
;
1609 call_netdevice_notifiers(NETDEV_JOIN
, slave_dev
);
1611 /* If this is the first slave, then we need to set the master's hardware
1612 * address to be the same as the slave's. */
1613 if (is_zero_ether_addr(bond
->dev
->dev_addr
))
1614 memcpy(bond
->dev
->dev_addr
, slave_dev
->dev_addr
,
1615 slave_dev
->addr_len
);
1618 new_slave
= kzalloc(sizeof(struct slave
), GFP_KERNEL
);
1621 goto err_undo_flags
;
1625 * Set the new_slave's queue_id to be zero. Queue ID mapping
1626 * is set via sysfs or module option if desired.
1628 new_slave
->queue_id
= 0;
1630 /* Save slave's original mtu and then set it to match the bond */
1631 new_slave
->original_mtu
= slave_dev
->mtu
;
1632 res
= dev_set_mtu(slave_dev
, bond
->dev
->mtu
);
1634 pr_debug("Error %d calling dev_set_mtu\n", res
);
1639 * Save slave's original ("permanent") mac address for modes
1640 * that need it, and for restoring it upon release, and then
1641 * set it to the master's address
1643 memcpy(new_slave
->perm_hwaddr
, slave_dev
->dev_addr
, ETH_ALEN
);
1645 if (!bond
->params
.fail_over_mac
) {
1647 * Set slave to master's mac address. The application already
1648 * set the master's mac address to that of the first slave
1650 memcpy(addr
.sa_data
, bond_dev
->dev_addr
, bond_dev
->addr_len
);
1651 addr
.sa_family
= slave_dev
->type
;
1652 res
= dev_set_mac_address(slave_dev
, &addr
);
1654 pr_debug("Error %d calling set_mac_address\n", res
);
1655 goto err_restore_mtu
;
1659 res
= netdev_set_bond_master(slave_dev
, bond_dev
);
1661 pr_debug("Error %d calling netdev_set_bond_master\n", res
);
1662 goto err_restore_mac
;
1665 /* open the slave since the application closed it */
1666 res
= dev_open(slave_dev
);
1668 pr_debug("Opening slave %s failed\n", slave_dev
->name
);
1669 goto err_unset_master
;
1672 new_slave
->bond
= bond
;
1673 new_slave
->dev
= slave_dev
;
1674 slave_dev
->priv_flags
|= IFF_BONDING
;
1676 if (bond_is_lb(bond
)) {
1677 /* bond_alb_init_slave() must be called before all other stages since
1678 * it might fail and we do not want to have to undo everything
1680 res
= bond_alb_init_slave(bond
, new_slave
);
1685 /* If the mode USES_PRIMARY, then the new slave gets the
1686 * master's promisc (and mc) settings only if it becomes the
1687 * curr_active_slave, and that is taken care of later when calling
1688 * bond_change_active()
1690 if (!USES_PRIMARY(bond
->params
.mode
)) {
1691 /* set promiscuity level to new slave */
1692 if (bond_dev
->flags
& IFF_PROMISC
) {
1693 res
= dev_set_promiscuity(slave_dev
, 1);
1698 /* set allmulti level to new slave */
1699 if (bond_dev
->flags
& IFF_ALLMULTI
) {
1700 res
= dev_set_allmulti(slave_dev
, 1);
1705 netif_addr_lock_bh(bond_dev
);
1706 /* upload master's mc_list to new slave */
1707 netdev_for_each_mc_addr(ha
, bond_dev
)
1708 dev_mc_add(slave_dev
, ha
->addr
);
1709 netif_addr_unlock_bh(bond_dev
);
1712 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
1713 /* add lacpdu mc addr to mc list */
1714 u8 lacpdu_multicast
[ETH_ALEN
] = MULTICAST_LACPDU_ADDR
;
1716 dev_mc_add(slave_dev
, lacpdu_multicast
);
1719 bond_add_vlans_on_slave(bond
, slave_dev
);
1721 write_lock_bh(&bond
->lock
);
1723 bond_attach_slave(bond
, new_slave
);
1725 new_slave
->delay
= 0;
1726 new_slave
->link_failure_count
= 0;
1728 write_unlock_bh(&bond
->lock
);
1730 bond_compute_features(bond
);
1732 read_lock(&bond
->lock
);
1734 new_slave
->last_arp_rx
= jiffies
-
1735 (msecs_to_jiffies(bond
->params
.arp_interval
) + 1);
1737 if (bond
->params
.miimon
&& !bond
->params
.use_carrier
) {
1738 link_reporting
= bond_check_dev_link(bond
, slave_dev
, 1);
1740 if ((link_reporting
== -1) && !bond
->params
.arp_interval
) {
1742 * miimon is set but a bonded network driver
1743 * does not support ETHTOOL/MII and
1744 * arp_interval is not set. Note: if
1745 * use_carrier is enabled, we will never go
1746 * here (because netif_carrier is always
1747 * supported); thus, we don't need to change
1748 * the messages for netif_carrier.
1750 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",
1751 bond_dev
->name
, slave_dev
->name
);
1752 } else if (link_reporting
== -1) {
1753 /* unable get link status using mii/ethtool */
1754 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",
1755 bond_dev
->name
, slave_dev
->name
);
1759 /* check for initial state */
1760 if (bond
->params
.miimon
) {
1761 if (bond_check_dev_link(bond
, slave_dev
, 0) == BMSR_LSTATUS
) {
1762 if (bond
->params
.updelay
) {
1763 new_slave
->link
= BOND_LINK_BACK
;
1764 new_slave
->delay
= bond
->params
.updelay
;
1766 new_slave
->link
= BOND_LINK_UP
;
1769 new_slave
->link
= BOND_LINK_DOWN
;
1771 } else if (bond
->params
.arp_interval
) {
1772 new_slave
->link
= (netif_carrier_ok(slave_dev
) ?
1773 BOND_LINK_UP
: BOND_LINK_DOWN
);
1775 new_slave
->link
= BOND_LINK_UP
;
1778 if (new_slave
->link
!= BOND_LINK_DOWN
)
1779 new_slave
->jiffies
= jiffies
;
1780 pr_debug("Initial state of slave_dev is BOND_LINK_%s\n",
1781 new_slave
->link
== BOND_LINK_DOWN
? "DOWN" :
1782 (new_slave
->link
== BOND_LINK_UP
? "UP" : "BACK"));
1784 bond_update_speed_duplex(new_slave
);
1786 if (USES_PRIMARY(bond
->params
.mode
) && bond
->params
.primary
[0]) {
1787 /* if there is a primary slave, remember it */
1788 if (strcmp(bond
->params
.primary
, new_slave
->dev
->name
) == 0) {
1789 bond
->primary_slave
= new_slave
;
1790 bond
->force_primary
= true;
1794 write_lock_bh(&bond
->curr_slave_lock
);
1796 switch (bond
->params
.mode
) {
1797 case BOND_MODE_ACTIVEBACKUP
:
1798 bond_set_slave_inactive_flags(new_slave
);
1799 bond_select_active_slave(bond
);
1801 case BOND_MODE_8023AD
:
1802 /* in 802.3ad mode, the internal mechanism
1803 * will activate the slaves in the selected
1806 bond_set_slave_inactive_flags(new_slave
);
1807 /* if this is the first slave */
1808 if (bond
->slave_cnt
== 1) {
1809 SLAVE_AD_INFO(new_slave
).id
= 1;
1810 /* Initialize AD with the number of times that the AD timer is called in 1 second
1811 * can be called only after the mac address of the bond is set
1813 bond_3ad_initialize(bond
, 1000/AD_TIMER_INTERVAL
);
1815 SLAVE_AD_INFO(new_slave
).id
=
1816 SLAVE_AD_INFO(new_slave
->prev
).id
+ 1;
1819 bond_3ad_bind_slave(new_slave
);
1823 bond_set_active_slave(new_slave
);
1824 bond_set_slave_inactive_flags(new_slave
);
1825 bond_select_active_slave(bond
);
1828 pr_debug("This slave is always active in trunk mode\n");
1830 /* always active in trunk mode */
1831 bond_set_active_slave(new_slave
);
1833 /* In trunking mode there is little meaning to curr_active_slave
1834 * anyway (it holds no special properties of the bond device),
1835 * so we can change it without calling change_active_interface()
1837 if (!bond
->curr_active_slave
)
1838 bond
->curr_active_slave
= new_slave
;
1841 } /* switch(bond_mode) */
1843 write_unlock_bh(&bond
->curr_slave_lock
);
1845 bond_set_carrier(bond
);
1847 #ifdef CONFIG_NET_POLL_CONTROLLER
1848 slave_dev
->npinfo
= bond_netpoll_info(bond
);
1849 if (slave_dev
->npinfo
) {
1850 if (slave_enable_netpoll(new_slave
)) {
1851 read_unlock(&bond
->lock
);
1852 pr_info("Error, %s: master_dev is using netpoll, "
1853 "but new slave device does not support netpoll.\n",
1861 read_unlock(&bond
->lock
);
1863 res
= bond_create_slave_symlinks(bond_dev
, slave_dev
);
1867 res
= netdev_rx_handler_register(slave_dev
, bond_handle_frame
,
1870 pr_debug("Error %d calling netdev_rx_handler_register\n", res
);
1871 goto err_dest_symlinks
;
1874 pr_info("%s: enslaving %s as a%s interface with a%s link.\n",
1875 bond_dev
->name
, slave_dev
->name
,
1876 bond_is_active_slave(new_slave
) ? "n active" : " backup",
1877 new_slave
->link
!= BOND_LINK_DOWN
? "n up" : " down");
1879 /* enslave is successful */
1882 /* Undo stages on error */
1884 bond_destroy_slave_symlinks(bond_dev
, slave_dev
);
1887 write_lock_bh(&bond
->lock
);
1888 bond_detach_slave(bond
, new_slave
);
1889 write_unlock_bh(&bond
->lock
);
1892 dev_close(slave_dev
);
1895 netdev_set_bond_master(slave_dev
, NULL
);
1898 if (!bond
->params
.fail_over_mac
) {
1899 /* XXX TODO - fom follow mode needs to change master's
1900 * MAC if this slave's MAC is in use by the bond, or at
1901 * least print a warning.
1903 memcpy(addr
.sa_data
, new_slave
->perm_hwaddr
, ETH_ALEN
);
1904 addr
.sa_family
= slave_dev
->type
;
1905 dev_set_mac_address(slave_dev
, &addr
);
1909 dev_set_mtu(slave_dev
, new_slave
->original_mtu
);
1915 bond_compute_features(bond
);
1921 * Try to release the slave device <slave> from the bond device <master>
1922 * It is legal to access curr_active_slave without a lock because all the function
1925 * The rules for slave state should be:
1926 * for Active/Backup:
1927 * Active stays on all backups go down
1928 * for Bonded connections:
1929 * The first up interface should be left on and all others downed.
1931 int bond_release(struct net_device
*bond_dev
, struct net_device
*slave_dev
)
1933 struct bonding
*bond
= netdev_priv(bond_dev
);
1934 struct slave
*slave
, *oldcurrent
;
1935 struct sockaddr addr
;
1936 netdev_features_t old_features
= bond_dev
->features
;
1938 /* slave is not a slave or master is not master of this slave */
1939 if (!(slave_dev
->flags
& IFF_SLAVE
) ||
1940 (slave_dev
->master
!= bond_dev
)) {
1941 pr_err("%s: Error: cannot release %s.\n",
1942 bond_dev
->name
, slave_dev
->name
);
1947 netdev_bonding_change(bond_dev
, NETDEV_RELEASE
);
1948 write_lock_bh(&bond
->lock
);
1950 slave
= bond_get_slave_by_dev(bond
, slave_dev
);
1952 /* not a slave of this bond */
1953 pr_info("%s: %s not enslaved\n",
1954 bond_dev
->name
, slave_dev
->name
);
1955 write_unlock_bh(&bond
->lock
);
1956 unblock_netpoll_tx();
1960 /* unregister rx_handler early so bond_handle_frame wouldn't be called
1961 * for this slave anymore.
1963 netdev_rx_handler_unregister(slave_dev
);
1964 write_unlock_bh(&bond
->lock
);
1966 write_lock_bh(&bond
->lock
);
1968 if (!bond
->params
.fail_over_mac
) {
1969 if (ether_addr_equal(bond_dev
->dev_addr
, slave
->perm_hwaddr
) &&
1970 bond
->slave_cnt
> 1)
1971 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",
1972 bond_dev
->name
, slave_dev
->name
,
1974 bond_dev
->name
, slave_dev
->name
);
1977 /* Inform AD package of unbinding of slave. */
1978 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
1979 /* must be called before the slave is
1980 * detached from the list
1982 bond_3ad_unbind_slave(slave
);
1985 pr_info("%s: releasing %s interface %s\n",
1987 bond_is_active_slave(slave
) ? "active" : "backup",
1990 oldcurrent
= bond
->curr_active_slave
;
1992 bond
->current_arp_slave
= NULL
;
1994 /* release the slave from its bond */
1995 bond_detach_slave(bond
, slave
);
1997 if (bond
->primary_slave
== slave
)
1998 bond
->primary_slave
= NULL
;
2000 if (oldcurrent
== slave
)
2001 bond_change_active_slave(bond
, NULL
);
2003 if (bond_is_lb(bond
)) {
2004 /* Must be called only after the slave has been
2005 * detached from the list and the curr_active_slave
2006 * has been cleared (if our_slave == old_current),
2007 * but before a new active slave is selected.
2009 write_unlock_bh(&bond
->lock
);
2010 bond_alb_deinit_slave(bond
, slave
);
2011 write_lock_bh(&bond
->lock
);
2014 if (oldcurrent
== slave
) {
2016 * Note that we hold RTNL over this sequence, so there
2017 * is no concern that another slave add/remove event
2020 write_unlock_bh(&bond
->lock
);
2021 read_lock(&bond
->lock
);
2022 write_lock_bh(&bond
->curr_slave_lock
);
2024 bond_select_active_slave(bond
);
2026 write_unlock_bh(&bond
->curr_slave_lock
);
2027 read_unlock(&bond
->lock
);
2028 write_lock_bh(&bond
->lock
);
2031 if (bond
->slave_cnt
== 0) {
2032 bond_set_carrier(bond
);
2034 /* if the last slave was removed, zero the mac address
2035 * of the master so it will be set by the application
2036 * to the mac address of the first slave
2038 memset(bond_dev
->dev_addr
, 0, bond_dev
->addr_len
);
2040 if (bond_vlan_used(bond
)) {
2041 pr_warning("%s: Warning: clearing HW address of %s while it still has VLANs.\n",
2042 bond_dev
->name
, bond_dev
->name
);
2043 pr_warning("%s: When re-adding slaves, make sure the bond's HW address matches its VLANs'.\n",
2048 write_unlock_bh(&bond
->lock
);
2049 unblock_netpoll_tx();
2051 if (bond
->slave_cnt
== 0)
2052 call_netdevice_notifiers(NETDEV_CHANGEADDR
, bond
->dev
);
2054 bond_compute_features(bond
);
2055 if (!(bond_dev
->features
& NETIF_F_VLAN_CHALLENGED
) &&
2056 (old_features
& NETIF_F_VLAN_CHALLENGED
))
2057 pr_info("%s: last VLAN challenged slave %s left bond %s. VLAN blocking is removed\n",
2058 bond_dev
->name
, slave_dev
->name
, bond_dev
->name
);
2060 /* must do this from outside any spinlocks */
2061 bond_destroy_slave_symlinks(bond_dev
, slave_dev
);
2063 bond_del_vlans_from_slave(bond
, slave_dev
);
2065 /* If the mode USES_PRIMARY, then we should only remove its
2066 * promisc and mc settings if it was the curr_active_slave, but that was
2067 * already taken care of above when we detached the slave
2069 if (!USES_PRIMARY(bond
->params
.mode
)) {
2070 /* unset promiscuity level from slave */
2071 if (bond_dev
->flags
& IFF_PROMISC
)
2072 dev_set_promiscuity(slave_dev
, -1);
2074 /* unset allmulti level from slave */
2075 if (bond_dev
->flags
& IFF_ALLMULTI
)
2076 dev_set_allmulti(slave_dev
, -1);
2078 /* flush master's mc_list from slave */
2079 netif_addr_lock_bh(bond_dev
);
2080 bond_mc_list_flush(bond_dev
, slave_dev
);
2081 netif_addr_unlock_bh(bond_dev
);
2084 netdev_set_bond_master(slave_dev
, NULL
);
2086 slave_disable_netpoll(slave
);
2088 /* close slave before restoring its mac address */
2089 dev_close(slave_dev
);
2091 if (bond
->params
.fail_over_mac
!= BOND_FOM_ACTIVE
) {
2092 /* restore original ("permanent") mac address */
2093 memcpy(addr
.sa_data
, slave
->perm_hwaddr
, ETH_ALEN
);
2094 addr
.sa_family
= slave_dev
->type
;
2095 dev_set_mac_address(slave_dev
, &addr
);
2098 dev_set_mtu(slave_dev
, slave
->original_mtu
);
2100 slave_dev
->priv_flags
&= ~IFF_BONDING
;
2104 return 0; /* deletion OK */
2108 * First release a slave and then destroy the bond if no more slaves are left.
2109 * Must be under rtnl_lock when this function is called.
2111 static int bond_release_and_destroy(struct net_device
*bond_dev
,
2112 struct net_device
*slave_dev
)
2114 struct bonding
*bond
= netdev_priv(bond_dev
);
2117 ret
= bond_release(bond_dev
, slave_dev
);
2118 if ((ret
== 0) && (bond
->slave_cnt
== 0)) {
2119 bond_dev
->priv_flags
|= IFF_DISABLE_NETPOLL
;
2120 pr_info("%s: destroying bond %s.\n",
2121 bond_dev
->name
, bond_dev
->name
);
2122 unregister_netdevice(bond_dev
);
2128 * This function releases all slaves.
2130 static int bond_release_all(struct net_device
*bond_dev
)
2132 struct bonding
*bond
= netdev_priv(bond_dev
);
2133 struct slave
*slave
;
2134 struct net_device
*slave_dev
;
2135 struct sockaddr addr
;
2137 write_lock_bh(&bond
->lock
);
2139 netif_carrier_off(bond_dev
);
2141 if (bond
->slave_cnt
== 0)
2144 bond
->current_arp_slave
= NULL
;
2145 bond
->primary_slave
= NULL
;
2146 bond_change_active_slave(bond
, NULL
);
2148 while ((slave
= bond
->first_slave
) != NULL
) {
2149 /* Inform AD package of unbinding of slave
2150 * before slave is detached from the list.
2152 if (bond
->params
.mode
== BOND_MODE_8023AD
)
2153 bond_3ad_unbind_slave(slave
);
2155 slave_dev
= slave
->dev
;
2156 bond_detach_slave(bond
, slave
);
2158 /* now that the slave is detached, unlock and perform
2159 * all the undo steps that should not be called from
2162 write_unlock_bh(&bond
->lock
);
2164 /* unregister rx_handler early so bond_handle_frame wouldn't
2165 * be called for this slave anymore.
2167 netdev_rx_handler_unregister(slave_dev
);
2170 if (bond_is_lb(bond
)) {
2171 /* must be called only after the slave
2172 * has been detached from the list
2174 bond_alb_deinit_slave(bond
, slave
);
2177 bond_destroy_slave_symlinks(bond_dev
, slave_dev
);
2178 bond_del_vlans_from_slave(bond
, slave_dev
);
2180 /* If the mode USES_PRIMARY, then we should only remove its
2181 * promisc and mc settings if it was the curr_active_slave, but that was
2182 * already taken care of above when we detached the slave
2184 if (!USES_PRIMARY(bond
->params
.mode
)) {
2185 /* unset promiscuity level from slave */
2186 if (bond_dev
->flags
& IFF_PROMISC
)
2187 dev_set_promiscuity(slave_dev
, -1);
2189 /* unset allmulti level from slave */
2190 if (bond_dev
->flags
& IFF_ALLMULTI
)
2191 dev_set_allmulti(slave_dev
, -1);
2193 /* flush master's mc_list from slave */
2194 netif_addr_lock_bh(bond_dev
);
2195 bond_mc_list_flush(bond_dev
, slave_dev
);
2196 netif_addr_unlock_bh(bond_dev
);
2199 netdev_set_bond_master(slave_dev
, NULL
);
2201 slave_disable_netpoll(slave
);
2203 /* close slave before restoring its mac address */
2204 dev_close(slave_dev
);
2206 if (!bond
->params
.fail_over_mac
) {
2207 /* restore original ("permanent") mac address*/
2208 memcpy(addr
.sa_data
, slave
->perm_hwaddr
, ETH_ALEN
);
2209 addr
.sa_family
= slave_dev
->type
;
2210 dev_set_mac_address(slave_dev
, &addr
);
2215 /* re-acquire the lock before getting the next slave */
2216 write_lock_bh(&bond
->lock
);
2219 /* zero the mac address of the master so it will be
2220 * set by the application to the mac address of the
2223 memset(bond_dev
->dev_addr
, 0, bond_dev
->addr_len
);
2225 if (bond_vlan_used(bond
)) {
2226 pr_warning("%s: Warning: clearing HW address of %s while it still has VLANs.\n",
2227 bond_dev
->name
, bond_dev
->name
);
2228 pr_warning("%s: When re-adding slaves, make sure the bond's HW address matches its VLANs'.\n",
2232 pr_info("%s: released all slaves\n", bond_dev
->name
);
2235 write_unlock_bh(&bond
->lock
);
2237 bond_compute_features(bond
);
2243 * This function changes the active slave to slave <slave_dev>.
2244 * It returns -EINVAL in the following cases.
2245 * - <slave_dev> is not found in the list.
2246 * - There is not active slave now.
2247 * - <slave_dev> is already active.
2248 * - The link state of <slave_dev> is not BOND_LINK_UP.
2249 * - <slave_dev> is not running.
2250 * In these cases, this function does nothing.
2251 * In the other cases, current_slave pointer is changed and 0 is returned.
2253 static int bond_ioctl_change_active(struct net_device
*bond_dev
, struct net_device
*slave_dev
)
2255 struct bonding
*bond
= netdev_priv(bond_dev
);
2256 struct slave
*old_active
= NULL
;
2257 struct slave
*new_active
= NULL
;
2260 if (!USES_PRIMARY(bond
->params
.mode
))
2263 /* Verify that master_dev is indeed the master of slave_dev */
2264 if (!(slave_dev
->flags
& IFF_SLAVE
) || (slave_dev
->master
!= bond_dev
))
2267 read_lock(&bond
->lock
);
2269 read_lock(&bond
->curr_slave_lock
);
2270 old_active
= bond
->curr_active_slave
;
2271 read_unlock(&bond
->curr_slave_lock
);
2273 new_active
= bond_get_slave_by_dev(bond
, slave_dev
);
2276 * Changing to the current active: do nothing; return success.
2278 if (new_active
&& (new_active
== old_active
)) {
2279 read_unlock(&bond
->lock
);
2285 (new_active
->link
== BOND_LINK_UP
) &&
2286 IS_UP(new_active
->dev
)) {
2288 write_lock_bh(&bond
->curr_slave_lock
);
2289 bond_change_active_slave(bond
, new_active
);
2290 write_unlock_bh(&bond
->curr_slave_lock
);
2291 unblock_netpoll_tx();
2295 read_unlock(&bond
->lock
);
2300 static int bond_info_query(struct net_device
*bond_dev
, struct ifbond
*info
)
2302 struct bonding
*bond
= netdev_priv(bond_dev
);
2304 info
->bond_mode
= bond
->params
.mode
;
2305 info
->miimon
= bond
->params
.miimon
;
2307 read_lock(&bond
->lock
);
2308 info
->num_slaves
= bond
->slave_cnt
;
2309 read_unlock(&bond
->lock
);
2314 static int bond_slave_info_query(struct net_device
*bond_dev
, struct ifslave
*info
)
2316 struct bonding
*bond
= netdev_priv(bond_dev
);
2317 struct slave
*slave
;
2318 int i
, res
= -ENODEV
;
2320 read_lock(&bond
->lock
);
2322 bond_for_each_slave(bond
, slave
, i
) {
2323 if (i
== (int)info
->slave_id
) {
2325 strcpy(info
->slave_name
, slave
->dev
->name
);
2326 info
->link
= slave
->link
;
2327 info
->state
= bond_slave_state(slave
);
2328 info
->link_failure_count
= slave
->link_failure_count
;
2333 read_unlock(&bond
->lock
);
2338 /*-------------------------------- Monitoring -------------------------------*/
2341 static int bond_miimon_inspect(struct bonding
*bond
)
2343 struct slave
*slave
;
2344 int i
, link_state
, commit
= 0;
2345 bool ignore_updelay
;
2347 ignore_updelay
= !bond
->curr_active_slave
? true : false;
2349 bond_for_each_slave(bond
, slave
, i
) {
2350 slave
->new_link
= BOND_LINK_NOCHANGE
;
2352 link_state
= bond_check_dev_link(bond
, slave
->dev
, 0);
2354 switch (slave
->link
) {
2359 slave
->link
= BOND_LINK_FAIL
;
2360 slave
->delay
= bond
->params
.downdelay
;
2362 pr_info("%s: link status down for %sinterface %s, disabling it in %d ms.\n",
2364 (bond
->params
.mode
==
2365 BOND_MODE_ACTIVEBACKUP
) ?
2366 (bond_is_active_slave(slave
) ?
2367 "active " : "backup ") : "",
2369 bond
->params
.downdelay
* bond
->params
.miimon
);
2372 case BOND_LINK_FAIL
:
2375 * recovered before downdelay expired
2377 slave
->link
= BOND_LINK_UP
;
2378 slave
->jiffies
= jiffies
;
2379 pr_info("%s: link status up again after %d ms for interface %s.\n",
2381 (bond
->params
.downdelay
- slave
->delay
) *
2382 bond
->params
.miimon
,
2387 if (slave
->delay
<= 0) {
2388 slave
->new_link
= BOND_LINK_DOWN
;
2396 case BOND_LINK_DOWN
:
2400 slave
->link
= BOND_LINK_BACK
;
2401 slave
->delay
= bond
->params
.updelay
;
2404 pr_info("%s: link status up for interface %s, enabling it in %d ms.\n",
2405 bond
->dev
->name
, slave
->dev
->name
,
2406 ignore_updelay
? 0 :
2407 bond
->params
.updelay
*
2408 bond
->params
.miimon
);
2411 case BOND_LINK_BACK
:
2413 slave
->link
= BOND_LINK_DOWN
;
2414 pr_info("%s: link status down again after %d ms for interface %s.\n",
2416 (bond
->params
.updelay
- slave
->delay
) *
2417 bond
->params
.miimon
,
2426 if (slave
->delay
<= 0) {
2427 slave
->new_link
= BOND_LINK_UP
;
2429 ignore_updelay
= false;
2441 static void bond_miimon_commit(struct bonding
*bond
)
2443 struct slave
*slave
;
2446 bond_for_each_slave(bond
, slave
, i
) {
2447 switch (slave
->new_link
) {
2448 case BOND_LINK_NOCHANGE
:
2452 slave
->link
= BOND_LINK_UP
;
2453 slave
->jiffies
= jiffies
;
2455 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
2456 /* prevent it from being the active one */
2457 bond_set_backup_slave(slave
);
2458 } else if (bond
->params
.mode
!= BOND_MODE_ACTIVEBACKUP
) {
2459 /* make it immediately active */
2460 bond_set_active_slave(slave
);
2461 } else if (slave
!= bond
->primary_slave
) {
2462 /* prevent it from being the active one */
2463 bond_set_backup_slave(slave
);
2466 bond_update_speed_duplex(slave
);
2468 pr_info("%s: link status definitely up for interface %s, %u Mbps %s duplex.\n",
2469 bond
->dev
->name
, slave
->dev
->name
,
2470 slave
->speed
, slave
->duplex
? "full" : "half");
2472 /* notify ad that the link status has changed */
2473 if (bond
->params
.mode
== BOND_MODE_8023AD
)
2474 bond_3ad_handle_link_change(slave
, BOND_LINK_UP
);
2476 if (bond_is_lb(bond
))
2477 bond_alb_handle_link_change(bond
, slave
,
2480 if (!bond
->curr_active_slave
||
2481 (slave
== bond
->primary_slave
))
2486 case BOND_LINK_DOWN
:
2487 if (slave
->link_failure_count
< UINT_MAX
)
2488 slave
->link_failure_count
++;
2490 slave
->link
= BOND_LINK_DOWN
;
2492 if (bond
->params
.mode
== BOND_MODE_ACTIVEBACKUP
||
2493 bond
->params
.mode
== BOND_MODE_8023AD
)
2494 bond_set_slave_inactive_flags(slave
);
2496 pr_info("%s: link status definitely down for interface %s, disabling it\n",
2497 bond
->dev
->name
, slave
->dev
->name
);
2499 if (bond
->params
.mode
== BOND_MODE_8023AD
)
2500 bond_3ad_handle_link_change(slave
,
2503 if (bond_is_lb(bond
))
2504 bond_alb_handle_link_change(bond
, slave
,
2507 if (slave
== bond
->curr_active_slave
)
2513 pr_err("%s: invalid new link %d on slave %s\n",
2514 bond
->dev
->name
, slave
->new_link
,
2516 slave
->new_link
= BOND_LINK_NOCHANGE
;
2524 write_lock_bh(&bond
->curr_slave_lock
);
2525 bond_select_active_slave(bond
);
2526 write_unlock_bh(&bond
->curr_slave_lock
);
2527 unblock_netpoll_tx();
2530 bond_set_carrier(bond
);
2536 * Really a wrapper that splits the mii monitor into two phases: an
2537 * inspection, then (if inspection indicates something needs to be done)
2538 * an acquisition of appropriate locks followed by a commit phase to
2539 * implement whatever link state changes are indicated.
2541 void bond_mii_monitor(struct work_struct
*work
)
2543 struct bonding
*bond
= container_of(work
, struct bonding
,
2545 bool should_notify_peers
= false;
2546 unsigned long delay
;
2548 read_lock(&bond
->lock
);
2550 delay
= msecs_to_jiffies(bond
->params
.miimon
);
2552 if (bond
->slave_cnt
== 0)
2555 should_notify_peers
= bond_should_notify_peers(bond
);
2557 if (bond_miimon_inspect(bond
)) {
2558 read_unlock(&bond
->lock
);
2560 /* Race avoidance with bond_close cancel of workqueue */
2561 if (!rtnl_trylock()) {
2562 read_lock(&bond
->lock
);
2564 should_notify_peers
= false;
2568 read_lock(&bond
->lock
);
2570 bond_miimon_commit(bond
);
2572 read_unlock(&bond
->lock
);
2573 rtnl_unlock(); /* might sleep, hold no other locks */
2574 read_lock(&bond
->lock
);
2578 if (bond
->params
.miimon
)
2579 queue_delayed_work(bond
->wq
, &bond
->mii_work
, delay
);
2581 read_unlock(&bond
->lock
);
2583 if (should_notify_peers
) {
2584 if (!rtnl_trylock()) {
2585 read_lock(&bond
->lock
);
2586 bond
->send_peer_notif
++;
2587 read_unlock(&bond
->lock
);
2590 netdev_bonding_change(bond
->dev
, NETDEV_NOTIFY_PEERS
);
2595 static int bond_has_this_ip(struct bonding
*bond
, __be32 ip
)
2597 struct vlan_entry
*vlan
;
2598 struct net_device
*vlan_dev
;
2600 if (ip
== bond_confirm_addr(bond
->dev
, 0, ip
))
2603 list_for_each_entry(vlan
, &bond
->vlan_list
, vlan_list
) {
2605 vlan_dev
= __vlan_find_dev_deep(bond
->dev
, vlan
->vlan_id
);
2607 if (vlan_dev
&& ip
== bond_confirm_addr(vlan_dev
, 0, ip
))
2615 * We go to the (large) trouble of VLAN tagging ARP frames because
2616 * switches in VLAN mode (especially if ports are configured as
2617 * "native" to a VLAN) might not pass non-tagged frames.
2619 static void bond_arp_send(struct net_device
*slave_dev
, int arp_op
, __be32 dest_ip
, __be32 src_ip
, unsigned short vlan_id
)
2621 struct sk_buff
*skb
;
2623 pr_debug("arp %d on slave %s: dst %x src %x vid %d\n", arp_op
,
2624 slave_dev
->name
, dest_ip
, src_ip
, vlan_id
);
2626 skb
= arp_create(arp_op
, ETH_P_ARP
, dest_ip
, slave_dev
, src_ip
,
2627 NULL
, slave_dev
->dev_addr
, NULL
);
2630 pr_err("ARP packet allocation failed\n");
2634 skb
= vlan_put_tag(skb
, vlan_id
);
2636 pr_err("failed to insert VLAN tag\n");
2644 static void bond_arp_send_all(struct bonding
*bond
, struct slave
*slave
)
2647 __be32
*targets
= bond
->params
.arp_targets
;
2648 struct vlan_entry
*vlan
;
2649 struct net_device
*vlan_dev
= NULL
;
2652 for (i
= 0; (i
< BOND_MAX_ARP_TARGETS
); i
++) {
2656 pr_debug("basa: target %x\n", targets
[i
]);
2657 if (!bond_vlan_used(bond
)) {
2658 pr_debug("basa: empty vlan: arp_send\n");
2659 addr
= bond_confirm_addr(bond
->dev
, targets
[i
], 0);
2660 bond_arp_send(slave
->dev
, ARPOP_REQUEST
, targets
[i
],
2666 * If VLANs are configured, we do a route lookup to
2667 * determine which VLAN interface would be used, so we
2668 * can tag the ARP with the proper VLAN tag.
2670 rt
= ip_route_output(dev_net(bond
->dev
), targets
[i
], 0,
2673 if (net_ratelimit()) {
2674 pr_warning("%s: no route to arp_ip_target %pI4\n",
2675 bond
->dev
->name
, &targets
[i
]);
2681 * This target is not on a VLAN
2683 if (rt
->dst
.dev
== bond
->dev
) {
2685 pr_debug("basa: rtdev == bond->dev: arp_send\n");
2686 addr
= bond_confirm_addr(bond
->dev
, targets
[i
], 0);
2687 bond_arp_send(slave
->dev
, ARPOP_REQUEST
, targets
[i
],
2693 list_for_each_entry(vlan
, &bond
->vlan_list
, vlan_list
) {
2695 vlan_dev
= __vlan_find_dev_deep(bond
->dev
,
2698 if (vlan_dev
== rt
->dst
.dev
) {
2699 vlan_id
= vlan
->vlan_id
;
2700 pr_debug("basa: vlan match on %s %d\n",
2701 vlan_dev
->name
, vlan_id
);
2706 if (vlan_id
&& vlan_dev
) {
2708 addr
= bond_confirm_addr(vlan_dev
, targets
[i
], 0);
2709 bond_arp_send(slave
->dev
, ARPOP_REQUEST
, targets
[i
],
2714 if (net_ratelimit()) {
2715 pr_warning("%s: no path to arp_ip_target %pI4 via rt.dev %s\n",
2716 bond
->dev
->name
, &targets
[i
],
2717 rt
->dst
.dev
? rt
->dst
.dev
->name
: "NULL");
2723 static void bond_validate_arp(struct bonding
*bond
, struct slave
*slave
, __be32 sip
, __be32 tip
)
2726 __be32
*targets
= bond
->params
.arp_targets
;
2728 for (i
= 0; (i
< BOND_MAX_ARP_TARGETS
) && targets
[i
]; i
++) {
2729 pr_debug("bva: sip %pI4 tip %pI4 t[%d] %pI4 bhti(tip) %d\n",
2730 &sip
, &tip
, i
, &targets
[i
],
2731 bond_has_this_ip(bond
, tip
));
2732 if (sip
== targets
[i
]) {
2733 if (bond_has_this_ip(bond
, tip
))
2734 slave
->last_arp_rx
= jiffies
;
2740 static int bond_arp_rcv(struct sk_buff
*skb
, struct bonding
*bond
,
2741 struct slave
*slave
)
2744 unsigned char *arp_ptr
;
2747 if (skb
->protocol
!= __cpu_to_be16(ETH_P_ARP
))
2748 return RX_HANDLER_ANOTHER
;
2750 read_lock(&bond
->lock
);
2752 pr_debug("bond_arp_rcv: bond %s skb->dev %s\n",
2753 bond
->dev
->name
, skb
->dev
->name
);
2755 if (!pskb_may_pull(skb
, arp_hdr_len(bond
->dev
)))
2759 if (arp
->ar_hln
!= bond
->dev
->addr_len
||
2760 skb
->pkt_type
== PACKET_OTHERHOST
||
2761 skb
->pkt_type
== PACKET_LOOPBACK
||
2762 arp
->ar_hrd
!= htons(ARPHRD_ETHER
) ||
2763 arp
->ar_pro
!= htons(ETH_P_IP
) ||
2767 arp_ptr
= (unsigned char *)(arp
+ 1);
2768 arp_ptr
+= bond
->dev
->addr_len
;
2769 memcpy(&sip
, arp_ptr
, 4);
2770 arp_ptr
+= 4 + bond
->dev
->addr_len
;
2771 memcpy(&tip
, arp_ptr
, 4);
2773 pr_debug("bond_arp_rcv: %s %s/%d av %d sv %d sip %pI4 tip %pI4\n",
2774 bond
->dev
->name
, slave
->dev
->name
, bond_slave_state(slave
),
2775 bond
->params
.arp_validate
, slave_do_arp_validate(bond
, slave
),
2779 * Backup slaves won't see the ARP reply, but do come through
2780 * here for each ARP probe (so we swap the sip/tip to validate
2781 * the probe). In a "redundant switch, common router" type of
2782 * configuration, the ARP probe will (hopefully) travel from
2783 * the active, through one switch, the router, then the other
2784 * switch before reaching the backup.
2786 if (bond_is_active_slave(slave
))
2787 bond_validate_arp(bond
, slave
, sip
, tip
);
2789 bond_validate_arp(bond
, slave
, tip
, sip
);
2792 read_unlock(&bond
->lock
);
2793 return RX_HANDLER_ANOTHER
;
2797 * this function is called regularly to monitor each slave's link
2798 * ensuring that traffic is being sent and received when arp monitoring
2799 * is used in load-balancing mode. if the adapter has been dormant, then an
2800 * arp is transmitted to generate traffic. see activebackup_arp_monitor for
2801 * arp monitoring in active backup mode.
2803 void bond_loadbalance_arp_mon(struct work_struct
*work
)
2805 struct bonding
*bond
= container_of(work
, struct bonding
,
2807 struct slave
*slave
, *oldcurrent
;
2808 int do_failover
= 0;
2812 read_lock(&bond
->lock
);
2814 delta_in_ticks
= msecs_to_jiffies(bond
->params
.arp_interval
);
2816 if (bond
->slave_cnt
== 0)
2819 read_lock(&bond
->curr_slave_lock
);
2820 oldcurrent
= bond
->curr_active_slave
;
2821 read_unlock(&bond
->curr_slave_lock
);
2823 /* see if any of the previous devices are up now (i.e. they have
2824 * xmt and rcv traffic). the curr_active_slave does not come into
2825 * the picture unless it is null. also, slave->jiffies is not needed
2826 * here because we send an arp on each slave and give a slave as
2827 * long as it needs to get the tx/rx within the delta.
2828 * TODO: what about up/down delay in arp mode? it wasn't here before
2831 bond_for_each_slave(bond
, slave
, i
) {
2832 unsigned long trans_start
= dev_trans_start(slave
->dev
);
2834 if (slave
->link
!= BOND_LINK_UP
) {
2835 if (time_in_range(jiffies
,
2836 trans_start
- delta_in_ticks
,
2837 trans_start
+ delta_in_ticks
) &&
2838 time_in_range(jiffies
,
2839 slave
->dev
->last_rx
- delta_in_ticks
,
2840 slave
->dev
->last_rx
+ delta_in_ticks
)) {
2842 slave
->link
= BOND_LINK_UP
;
2843 bond_set_active_slave(slave
);
2845 /* primary_slave has no meaning in round-robin
2846 * mode. the window of a slave being up and
2847 * curr_active_slave being null after enslaving
2851 pr_info("%s: link status definitely up for interface %s, ",
2856 pr_info("%s: interface %s is now up\n",
2862 /* slave->link == BOND_LINK_UP */
2864 /* not all switches will respond to an arp request
2865 * when the source ip is 0, so don't take the link down
2866 * if we don't know our ip yet
2868 if (!time_in_range(jiffies
,
2869 trans_start
- delta_in_ticks
,
2870 trans_start
+ 2 * delta_in_ticks
) ||
2871 !time_in_range(jiffies
,
2872 slave
->dev
->last_rx
- delta_in_ticks
,
2873 slave
->dev
->last_rx
+ 2 * delta_in_ticks
)) {
2875 slave
->link
= BOND_LINK_DOWN
;
2876 bond_set_backup_slave(slave
);
2878 if (slave
->link_failure_count
< UINT_MAX
)
2879 slave
->link_failure_count
++;
2881 pr_info("%s: interface %s is now down.\n",
2885 if (slave
== oldcurrent
)
2890 /* note: if switch is in round-robin mode, all links
2891 * must tx arp to ensure all links rx an arp - otherwise
2892 * links may oscillate or not come up at all; if switch is
2893 * in something like xor mode, there is nothing we can
2894 * do - all replies will be rx'ed on same link causing slaves
2895 * to be unstable during low/no traffic periods
2897 if (IS_UP(slave
->dev
))
2898 bond_arp_send_all(bond
, slave
);
2903 write_lock_bh(&bond
->curr_slave_lock
);
2905 bond_select_active_slave(bond
);
2907 write_unlock_bh(&bond
->curr_slave_lock
);
2908 unblock_netpoll_tx();
2912 if (bond
->params
.arp_interval
)
2913 queue_delayed_work(bond
->wq
, &bond
->arp_work
, delta_in_ticks
);
2915 read_unlock(&bond
->lock
);
2919 * Called to inspect slaves for active-backup mode ARP monitor link state
2920 * changes. Sets new_link in slaves to specify what action should take
2921 * place for the slave. Returns 0 if no changes are found, >0 if changes
2922 * to link states must be committed.
2924 * Called with bond->lock held for read.
2926 static int bond_ab_arp_inspect(struct bonding
*bond
, int delta_in_ticks
)
2928 struct slave
*slave
;
2930 unsigned long trans_start
;
2932 bond_for_each_slave(bond
, slave
, i
) {
2933 slave
->new_link
= BOND_LINK_NOCHANGE
;
2935 if (slave
->link
!= BOND_LINK_UP
) {
2936 if (time_in_range(jiffies
,
2937 slave_last_rx(bond
, slave
) - delta_in_ticks
,
2938 slave_last_rx(bond
, slave
) + delta_in_ticks
)) {
2940 slave
->new_link
= BOND_LINK_UP
;
2948 * Give slaves 2*delta after being enslaved or made
2949 * active. This avoids bouncing, as the last receive
2950 * times need a full ARP monitor cycle to be updated.
2952 if (time_in_range(jiffies
,
2953 slave
->jiffies
- delta_in_ticks
,
2954 slave
->jiffies
+ 2 * delta_in_ticks
))
2958 * Backup slave is down if:
2959 * - No current_arp_slave AND
2960 * - more than 3*delta since last receive AND
2961 * - the bond has an IP address
2963 * Note: a non-null current_arp_slave indicates
2964 * the curr_active_slave went down and we are
2965 * searching for a new one; under this condition
2966 * we only take the curr_active_slave down - this
2967 * gives each slave a chance to tx/rx traffic
2968 * before being taken out
2970 if (!bond_is_active_slave(slave
) &&
2971 !bond
->current_arp_slave
&&
2972 !time_in_range(jiffies
,
2973 slave_last_rx(bond
, slave
) - delta_in_ticks
,
2974 slave_last_rx(bond
, slave
) + 3 * delta_in_ticks
)) {
2976 slave
->new_link
= BOND_LINK_DOWN
;
2981 * Active slave is down if:
2982 * - more than 2*delta since transmitting OR
2983 * - (more than 2*delta since receive AND
2984 * the bond has an IP address)
2986 trans_start
= dev_trans_start(slave
->dev
);
2987 if (bond_is_active_slave(slave
) &&
2988 (!time_in_range(jiffies
,
2989 trans_start
- delta_in_ticks
,
2990 trans_start
+ 2 * delta_in_ticks
) ||
2991 !time_in_range(jiffies
,
2992 slave_last_rx(bond
, slave
) - delta_in_ticks
,
2993 slave_last_rx(bond
, slave
) + 2 * delta_in_ticks
))) {
2995 slave
->new_link
= BOND_LINK_DOWN
;
3004 * Called to commit link state changes noted by inspection step of
3005 * active-backup mode ARP monitor.
3007 * Called with RTNL and bond->lock for read.
3009 static void bond_ab_arp_commit(struct bonding
*bond
, int delta_in_ticks
)
3011 struct slave
*slave
;
3013 unsigned long trans_start
;
3015 bond_for_each_slave(bond
, slave
, i
) {
3016 switch (slave
->new_link
) {
3017 case BOND_LINK_NOCHANGE
:
3021 trans_start
= dev_trans_start(slave
->dev
);
3022 if ((!bond
->curr_active_slave
&&
3023 time_in_range(jiffies
,
3024 trans_start
- delta_in_ticks
,
3025 trans_start
+ delta_in_ticks
)) ||
3026 bond
->curr_active_slave
!= slave
) {
3027 slave
->link
= BOND_LINK_UP
;
3028 if (bond
->current_arp_slave
) {
3029 bond_set_slave_inactive_flags(
3030 bond
->current_arp_slave
);
3031 bond
->current_arp_slave
= NULL
;
3034 pr_info("%s: link status definitely up for interface %s.\n",
3035 bond
->dev
->name
, slave
->dev
->name
);
3037 if (!bond
->curr_active_slave
||
3038 (slave
== bond
->primary_slave
))
3045 case BOND_LINK_DOWN
:
3046 if (slave
->link_failure_count
< UINT_MAX
)
3047 slave
->link_failure_count
++;
3049 slave
->link
= BOND_LINK_DOWN
;
3050 bond_set_slave_inactive_flags(slave
);
3052 pr_info("%s: link status definitely down for interface %s, disabling it\n",
3053 bond
->dev
->name
, slave
->dev
->name
);
3055 if (slave
== bond
->curr_active_slave
) {
3056 bond
->current_arp_slave
= NULL
;
3063 pr_err("%s: impossible: new_link %d on slave %s\n",
3064 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
);
3075 unblock_netpoll_tx();
3078 bond_set_carrier(bond
);
3082 * Send ARP probes for active-backup mode ARP monitor.
3084 * Called with bond->lock held for read.
3086 static void bond_ab_arp_probe(struct bonding
*bond
)
3088 struct slave
*slave
;
3091 read_lock(&bond
->curr_slave_lock
);
3093 if (bond
->current_arp_slave
&& bond
->curr_active_slave
)
3094 pr_info("PROBE: c_arp %s && cas %s BAD\n",
3095 bond
->current_arp_slave
->dev
->name
,
3096 bond
->curr_active_slave
->dev
->name
);
3098 if (bond
->curr_active_slave
) {
3099 bond_arp_send_all(bond
, bond
->curr_active_slave
);
3100 read_unlock(&bond
->curr_slave_lock
);
3104 read_unlock(&bond
->curr_slave_lock
);
3106 /* if we don't have a curr_active_slave, search for the next available
3107 * backup slave from the current_arp_slave and make it the candidate
3108 * for becoming the curr_active_slave
3111 if (!bond
->current_arp_slave
) {
3112 bond
->current_arp_slave
= bond
->first_slave
;
3113 if (!bond
->current_arp_slave
)
3117 bond_set_slave_inactive_flags(bond
->current_arp_slave
);
3119 /* search for next candidate */
3120 bond_for_each_slave_from(bond
, slave
, i
, bond
->current_arp_slave
->next
) {
3121 if (IS_UP(slave
->dev
)) {
3122 slave
->link
= BOND_LINK_BACK
;
3123 bond_set_slave_active_flags(slave
);
3124 bond_arp_send_all(bond
, slave
);
3125 slave
->jiffies
= jiffies
;
3126 bond
->current_arp_slave
= slave
;
3130 /* if the link state is up at this point, we
3131 * mark it down - this can happen if we have
3132 * simultaneous link failures and
3133 * reselect_active_interface doesn't make this
3134 * one the current slave so it is still marked
3135 * up when it is actually down
3137 if (slave
->link
== BOND_LINK_UP
) {
3138 slave
->link
= BOND_LINK_DOWN
;
3139 if (slave
->link_failure_count
< UINT_MAX
)
3140 slave
->link_failure_count
++;
3142 bond_set_slave_inactive_flags(slave
);
3144 pr_info("%s: backup interface %s is now down.\n",
3145 bond
->dev
->name
, slave
->dev
->name
);
3150 void bond_activebackup_arp_mon(struct work_struct
*work
)
3152 struct bonding
*bond
= container_of(work
, struct bonding
,
3154 bool should_notify_peers
= false;
3157 read_lock(&bond
->lock
);
3159 delta_in_ticks
= msecs_to_jiffies(bond
->params
.arp_interval
);
3161 if (bond
->slave_cnt
== 0)
3164 should_notify_peers
= bond_should_notify_peers(bond
);
3166 if (bond_ab_arp_inspect(bond
, delta_in_ticks
)) {
3167 read_unlock(&bond
->lock
);
3169 /* Race avoidance with bond_close flush of workqueue */
3170 if (!rtnl_trylock()) {
3171 read_lock(&bond
->lock
);
3173 should_notify_peers
= false;
3177 read_lock(&bond
->lock
);
3179 bond_ab_arp_commit(bond
, delta_in_ticks
);
3181 read_unlock(&bond
->lock
);
3183 read_lock(&bond
->lock
);
3186 bond_ab_arp_probe(bond
);
3189 if (bond
->params
.arp_interval
)
3190 queue_delayed_work(bond
->wq
, &bond
->arp_work
, delta_in_ticks
);
3192 read_unlock(&bond
->lock
);
3194 if (should_notify_peers
) {
3195 if (!rtnl_trylock()) {
3196 read_lock(&bond
->lock
);
3197 bond
->send_peer_notif
++;
3198 read_unlock(&bond
->lock
);
3201 netdev_bonding_change(bond
->dev
, NETDEV_NOTIFY_PEERS
);
3206 /*-------------------------- netdev event handling --------------------------*/
3209 * Change device name
3211 static int bond_event_changename(struct bonding
*bond
)
3213 bond_remove_proc_entry(bond
);
3214 bond_create_proc_entry(bond
);
3216 bond_debug_reregister(bond
);
3221 static int bond_master_netdev_event(unsigned long event
,
3222 struct net_device
*bond_dev
)
3224 struct bonding
*event_bond
= netdev_priv(bond_dev
);
3227 case NETDEV_CHANGENAME
:
3228 return bond_event_changename(event_bond
);
3236 static int bond_slave_netdev_event(unsigned long event
,
3237 struct net_device
*slave_dev
)
3239 struct net_device
*bond_dev
= slave_dev
->master
;
3240 struct bonding
*bond
= netdev_priv(bond_dev
);
3241 struct slave
*slave
= NULL
;
3244 case NETDEV_UNREGISTER
:
3246 if (bond
->setup_by_slave
)
3247 bond_release_and_destroy(bond_dev
, slave_dev
);
3249 bond_release(bond_dev
, slave_dev
);
3254 slave
= bond_get_slave_by_dev(bond
, slave_dev
);
3256 u32 old_speed
= slave
->speed
;
3257 u8 old_duplex
= slave
->duplex
;
3259 bond_update_speed_duplex(slave
);
3261 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
3262 if (old_speed
!= slave
->speed
)
3263 bond_3ad_adapter_speed_changed(slave
);
3264 if (old_duplex
!= slave
->duplex
)
3265 bond_3ad_adapter_duplex_changed(slave
);
3272 * ... Or is it this?
3275 case NETDEV_CHANGEMTU
:
3277 * TODO: Should slaves be allowed to
3278 * independently alter their MTU? For
3279 * an active-backup bond, slaves need
3280 * not be the same type of device, so
3281 * MTUs may vary. For other modes,
3282 * slaves arguably should have the
3283 * same MTUs. To do this, we'd need to
3284 * take over the slave's change_mtu
3285 * function for the duration of their
3289 case NETDEV_CHANGENAME
:
3291 * TODO: handle changing the primary's name
3294 case NETDEV_FEAT_CHANGE
:
3295 bond_compute_features(bond
);
3305 * bond_netdev_event: handle netdev notifier chain events.
3307 * This function receives events for the netdev chain. The caller (an
3308 * ioctl handler calling blocking_notifier_call_chain) holds the necessary
3309 * locks for us to safely manipulate the slave devices (RTNL lock,
3312 static int bond_netdev_event(struct notifier_block
*this,
3313 unsigned long event
, void *ptr
)
3315 struct net_device
*event_dev
= (struct net_device
*)ptr
;
3317 pr_debug("event_dev: %s, event: %lx\n",
3318 event_dev
? event_dev
->name
: "None",
3321 if (!(event_dev
->priv_flags
& IFF_BONDING
))
3324 if (event_dev
->flags
& IFF_MASTER
) {
3325 pr_debug("IFF_MASTER\n");
3326 return bond_master_netdev_event(event
, event_dev
);
3329 if (event_dev
->flags
& IFF_SLAVE
) {
3330 pr_debug("IFF_SLAVE\n");
3331 return bond_slave_netdev_event(event
, event_dev
);
3337 static struct notifier_block bond_netdev_notifier
= {
3338 .notifier_call
= bond_netdev_event
,
3341 /*---------------------------- Hashing Policies -----------------------------*/
3344 * Hash for the output device based upon layer 2 and layer 3 data. If
3345 * the packet is not IP mimic bond_xmit_hash_policy_l2()
3347 static int bond_xmit_hash_policy_l23(struct sk_buff
*skb
, int count
)
3349 struct ethhdr
*data
= (struct ethhdr
*)skb
->data
;
3350 struct iphdr
*iph
= ip_hdr(skb
);
3352 if (skb
->protocol
== htons(ETH_P_IP
)) {
3353 return ((ntohl(iph
->saddr
^ iph
->daddr
) & 0xffff) ^
3354 (data
->h_dest
[5] ^ data
->h_source
[5])) % count
;
3357 return (data
->h_dest
[5] ^ data
->h_source
[5]) % count
;
3361 * Hash for the output device based upon layer 3 and layer 4 data. If
3362 * the packet is a frag or not TCP or UDP, just use layer 3 data. If it is
3363 * altogether not IP, mimic bond_xmit_hash_policy_l2()
3365 static int bond_xmit_hash_policy_l34(struct sk_buff
*skb
, int count
)
3367 struct ethhdr
*data
= (struct ethhdr
*)skb
->data
;
3368 struct iphdr
*iph
= ip_hdr(skb
);
3369 __be16
*layer4hdr
= (__be16
*)((u32
*)iph
+ iph
->ihl
);
3372 if (skb
->protocol
== htons(ETH_P_IP
)) {
3373 if (!ip_is_fragment(iph
) &&
3374 (iph
->protocol
== IPPROTO_TCP
||
3375 iph
->protocol
== IPPROTO_UDP
)) {
3376 layer4_xor
= ntohs((*layer4hdr
^ *(layer4hdr
+ 1)));
3378 return (layer4_xor
^
3379 ((ntohl(iph
->saddr
^ iph
->daddr
)) & 0xffff)) % count
;
3383 return (data
->h_dest
[5] ^ data
->h_source
[5]) % count
;
3387 * Hash for the output device based upon layer 2 data
3389 static int bond_xmit_hash_policy_l2(struct sk_buff
*skb
, int count
)
3391 struct ethhdr
*data
= (struct ethhdr
*)skb
->data
;
3393 return (data
->h_dest
[5] ^ data
->h_source
[5]) % count
;
3396 /*-------------------------- Device entry points ----------------------------*/
3398 static int bond_open(struct net_device
*bond_dev
)
3400 struct bonding
*bond
= netdev_priv(bond_dev
);
3401 struct slave
*slave
;
3404 /* reset slave->backup and slave->inactive */
3405 read_lock(&bond
->lock
);
3406 if (bond
->slave_cnt
> 0) {
3407 read_lock(&bond
->curr_slave_lock
);
3408 bond_for_each_slave(bond
, slave
, i
) {
3409 if ((bond
->params
.mode
== BOND_MODE_ACTIVEBACKUP
)
3410 && (slave
!= bond
->curr_active_slave
)) {
3411 bond_set_slave_inactive_flags(slave
);
3413 bond_set_slave_active_flags(slave
);
3416 read_unlock(&bond
->curr_slave_lock
);
3418 read_unlock(&bond
->lock
);
3420 INIT_DELAYED_WORK(&bond
->mcast_work
, bond_resend_igmp_join_requests_delayed
);
3422 if (bond_is_lb(bond
)) {
3423 /* bond_alb_initialize must be called before the timer
3426 if (bond_alb_initialize(bond
, (bond
->params
.mode
== BOND_MODE_ALB
))) {
3427 /* something went wrong - fail the open operation */
3431 INIT_DELAYED_WORK(&bond
->alb_work
, bond_alb_monitor
);
3432 queue_delayed_work(bond
->wq
, &bond
->alb_work
, 0);
3435 if (bond
->params
.miimon
) { /* link check interval, in milliseconds. */
3436 INIT_DELAYED_WORK(&bond
->mii_work
, bond_mii_monitor
);
3437 queue_delayed_work(bond
->wq
, &bond
->mii_work
, 0);
3440 if (bond
->params
.arp_interval
) { /* arp interval, in milliseconds. */
3441 if (bond
->params
.mode
== BOND_MODE_ACTIVEBACKUP
)
3442 INIT_DELAYED_WORK(&bond
->arp_work
,
3443 bond_activebackup_arp_mon
);
3445 INIT_DELAYED_WORK(&bond
->arp_work
,
3446 bond_loadbalance_arp_mon
);
3448 queue_delayed_work(bond
->wq
, &bond
->arp_work
, 0);
3449 if (bond
->params
.arp_validate
)
3450 bond
->recv_probe
= bond_arp_rcv
;
3453 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
3454 INIT_DELAYED_WORK(&bond
->ad_work
, bond_3ad_state_machine_handler
);
3455 queue_delayed_work(bond
->wq
, &bond
->ad_work
, 0);
3456 /* register to receive LACPDUs */
3457 bond
->recv_probe
= bond_3ad_lacpdu_recv
;
3458 bond_3ad_initiate_agg_selection(bond
, 1);
3464 static int bond_close(struct net_device
*bond_dev
)
3466 struct bonding
*bond
= netdev_priv(bond_dev
);
3468 write_lock_bh(&bond
->lock
);
3470 bond
->send_peer_notif
= 0;
3472 write_unlock_bh(&bond
->lock
);
3474 if (bond
->params
.miimon
) { /* link check interval, in milliseconds. */
3475 cancel_delayed_work_sync(&bond
->mii_work
);
3478 if (bond
->params
.arp_interval
) { /* arp interval, in milliseconds. */
3479 cancel_delayed_work_sync(&bond
->arp_work
);
3482 switch (bond
->params
.mode
) {
3483 case BOND_MODE_8023AD
:
3484 cancel_delayed_work_sync(&bond
->ad_work
);
3488 cancel_delayed_work_sync(&bond
->alb_work
);
3494 if (delayed_work_pending(&bond
->mcast_work
))
3495 cancel_delayed_work_sync(&bond
->mcast_work
);
3497 if (bond_is_lb(bond
)) {
3498 /* Must be called only after all
3499 * slaves have been released
3501 bond_alb_deinitialize(bond
);
3503 bond
->recv_probe
= NULL
;
3508 static struct rtnl_link_stats64
*bond_get_stats(struct net_device
*bond_dev
,
3509 struct rtnl_link_stats64
*stats
)
3511 struct bonding
*bond
= netdev_priv(bond_dev
);
3512 struct rtnl_link_stats64 temp
;
3513 struct slave
*slave
;
3516 memset(stats
, 0, sizeof(*stats
));
3518 read_lock_bh(&bond
->lock
);
3520 bond_for_each_slave(bond
, slave
, i
) {
3521 const struct rtnl_link_stats64
*sstats
=
3522 dev_get_stats(slave
->dev
, &temp
);
3524 stats
->rx_packets
+= sstats
->rx_packets
;
3525 stats
->rx_bytes
+= sstats
->rx_bytes
;
3526 stats
->rx_errors
+= sstats
->rx_errors
;
3527 stats
->rx_dropped
+= sstats
->rx_dropped
;
3529 stats
->tx_packets
+= sstats
->tx_packets
;
3530 stats
->tx_bytes
+= sstats
->tx_bytes
;
3531 stats
->tx_errors
+= sstats
->tx_errors
;
3532 stats
->tx_dropped
+= sstats
->tx_dropped
;
3534 stats
->multicast
+= sstats
->multicast
;
3535 stats
->collisions
+= sstats
->collisions
;
3537 stats
->rx_length_errors
+= sstats
->rx_length_errors
;
3538 stats
->rx_over_errors
+= sstats
->rx_over_errors
;
3539 stats
->rx_crc_errors
+= sstats
->rx_crc_errors
;
3540 stats
->rx_frame_errors
+= sstats
->rx_frame_errors
;
3541 stats
->rx_fifo_errors
+= sstats
->rx_fifo_errors
;
3542 stats
->rx_missed_errors
+= sstats
->rx_missed_errors
;
3544 stats
->tx_aborted_errors
+= sstats
->tx_aborted_errors
;
3545 stats
->tx_carrier_errors
+= sstats
->tx_carrier_errors
;
3546 stats
->tx_fifo_errors
+= sstats
->tx_fifo_errors
;
3547 stats
->tx_heartbeat_errors
+= sstats
->tx_heartbeat_errors
;
3548 stats
->tx_window_errors
+= sstats
->tx_window_errors
;
3551 read_unlock_bh(&bond
->lock
);
3556 static int bond_do_ioctl(struct net_device
*bond_dev
, struct ifreq
*ifr
, int cmd
)
3558 struct net_device
*slave_dev
= NULL
;
3559 struct ifbond k_binfo
;
3560 struct ifbond __user
*u_binfo
= NULL
;
3561 struct ifslave k_sinfo
;
3562 struct ifslave __user
*u_sinfo
= NULL
;
3563 struct mii_ioctl_data
*mii
= NULL
;
3566 pr_debug("bond_ioctl: master=%s, cmd=%d\n", bond_dev
->name
, cmd
);
3578 * We do this again just in case we were called by SIOCGMIIREG
3579 * instead of SIOCGMIIPHY.
3586 if (mii
->reg_num
== 1) {
3587 struct bonding
*bond
= netdev_priv(bond_dev
);
3589 read_lock(&bond
->lock
);
3590 read_lock(&bond
->curr_slave_lock
);
3591 if (netif_carrier_ok(bond
->dev
))
3592 mii
->val_out
= BMSR_LSTATUS
;
3594 read_unlock(&bond
->curr_slave_lock
);
3595 read_unlock(&bond
->lock
);
3599 case BOND_INFO_QUERY_OLD
:
3600 case SIOCBONDINFOQUERY
:
3601 u_binfo
= (struct ifbond __user
*)ifr
->ifr_data
;
3603 if (copy_from_user(&k_binfo
, u_binfo
, sizeof(ifbond
)))
3606 res
= bond_info_query(bond_dev
, &k_binfo
);
3608 copy_to_user(u_binfo
, &k_binfo
, sizeof(ifbond
)))
3612 case BOND_SLAVE_INFO_QUERY_OLD
:
3613 case SIOCBONDSLAVEINFOQUERY
:
3614 u_sinfo
= (struct ifslave __user
*)ifr
->ifr_data
;
3616 if (copy_from_user(&k_sinfo
, u_sinfo
, sizeof(ifslave
)))
3619 res
= bond_slave_info_query(bond_dev
, &k_sinfo
);
3621 copy_to_user(u_sinfo
, &k_sinfo
, sizeof(ifslave
)))
3630 if (!capable(CAP_NET_ADMIN
))
3633 slave_dev
= dev_get_by_name(dev_net(bond_dev
), ifr
->ifr_slave
);
3635 pr_debug("slave_dev=%p:\n", slave_dev
);
3640 pr_debug("slave_dev->name=%s:\n", slave_dev
->name
);
3642 case BOND_ENSLAVE_OLD
:
3643 case SIOCBONDENSLAVE
:
3644 res
= bond_enslave(bond_dev
, slave_dev
);
3646 case BOND_RELEASE_OLD
:
3647 case SIOCBONDRELEASE
:
3648 res
= bond_release(bond_dev
, slave_dev
);
3650 case BOND_SETHWADDR_OLD
:
3651 case SIOCBONDSETHWADDR
:
3652 res
= bond_sethwaddr(bond_dev
, slave_dev
);
3654 case BOND_CHANGE_ACTIVE_OLD
:
3655 case SIOCBONDCHANGEACTIVE
:
3656 res
= bond_ioctl_change_active(bond_dev
, slave_dev
);
3668 static bool bond_addr_in_mc_list(unsigned char *addr
,
3669 struct netdev_hw_addr_list
*list
,
3672 struct netdev_hw_addr
*ha
;
3674 netdev_hw_addr_list_for_each(ha
, list
)
3675 if (!memcmp(ha
->addr
, addr
, addrlen
))
3681 static void bond_change_rx_flags(struct net_device
*bond_dev
, int change
)
3683 struct bonding
*bond
= netdev_priv(bond_dev
);
3685 if (change
& IFF_PROMISC
)
3686 bond_set_promiscuity(bond
,
3687 bond_dev
->flags
& IFF_PROMISC
? 1 : -1);
3689 if (change
& IFF_ALLMULTI
)
3690 bond_set_allmulti(bond
,
3691 bond_dev
->flags
& IFF_ALLMULTI
? 1 : -1);
3694 static void bond_set_multicast_list(struct net_device
*bond_dev
)
3696 struct bonding
*bond
= netdev_priv(bond_dev
);
3697 struct netdev_hw_addr
*ha
;
3700 read_lock(&bond
->lock
);
3702 /* looking for addresses to add to slaves' mc list */
3703 netdev_for_each_mc_addr(ha
, bond_dev
) {
3704 found
= bond_addr_in_mc_list(ha
->addr
, &bond
->mc_list
,
3705 bond_dev
->addr_len
);
3707 bond_mc_add(bond
, ha
->addr
);
3710 /* looking for addresses to delete from slaves' list */
3711 netdev_hw_addr_list_for_each(ha
, &bond
->mc_list
) {
3712 found
= bond_addr_in_mc_list(ha
->addr
, &bond_dev
->mc
,
3713 bond_dev
->addr_len
);
3715 bond_mc_del(bond
, ha
->addr
);
3718 /* save master's multicast list */
3719 __hw_addr_flush(&bond
->mc_list
);
3720 __hw_addr_add_multiple(&bond
->mc_list
, &bond_dev
->mc
,
3721 bond_dev
->addr_len
, NETDEV_HW_ADDR_T_MULTICAST
);
3723 read_unlock(&bond
->lock
);
3726 static int bond_neigh_init(struct neighbour
*n
)
3728 struct bonding
*bond
= netdev_priv(n
->dev
);
3729 struct slave
*slave
= bond
->first_slave
;
3730 const struct net_device_ops
*slave_ops
;
3731 struct neigh_parms parms
;
3737 slave_ops
= slave
->dev
->netdev_ops
;
3739 if (!slave_ops
->ndo_neigh_setup
)
3742 parms
.neigh_setup
= NULL
;
3743 parms
.neigh_cleanup
= NULL
;
3744 ret
= slave_ops
->ndo_neigh_setup(slave
->dev
, &parms
);
3749 * Assign slave's neigh_cleanup to neighbour in case cleanup is called
3750 * after the last slave has been detached. Assumes that all slaves
3751 * utilize the same neigh_cleanup (true at this writing as only user
3754 n
->parms
->neigh_cleanup
= parms
.neigh_cleanup
;
3756 if (!parms
.neigh_setup
)
3759 return parms
.neigh_setup(n
);
3763 * The bonding ndo_neigh_setup is called at init time beofre any
3764 * slave exists. So we must declare proxy setup function which will
3765 * be used at run time to resolve the actual slave neigh param setup.
3767 static int bond_neigh_setup(struct net_device
*dev
,
3768 struct neigh_parms
*parms
)
3770 parms
->neigh_setup
= bond_neigh_init
;
3776 * Change the MTU of all of a master's slaves to match the master
3778 static int bond_change_mtu(struct net_device
*bond_dev
, int new_mtu
)
3780 struct bonding
*bond
= netdev_priv(bond_dev
);
3781 struct slave
*slave
, *stop_at
;
3785 pr_debug("bond=%p, name=%s, new_mtu=%d\n", bond
,
3786 (bond_dev
? bond_dev
->name
: "None"), new_mtu
);
3788 /* Can't hold bond->lock with bh disabled here since
3789 * some base drivers panic. On the other hand we can't
3790 * hold bond->lock without bh disabled because we'll
3791 * deadlock. The only solution is to rely on the fact
3792 * that we're under rtnl_lock here, and the slaves
3793 * list won't change. This doesn't solve the problem
3794 * of setting the slave's MTU while it is
3795 * transmitting, but the assumption is that the base
3796 * driver can handle that.
3798 * TODO: figure out a way to safely iterate the slaves
3799 * list, but without holding a lock around the actual
3800 * call to the base driver.
3803 bond_for_each_slave(bond
, slave
, i
) {
3804 pr_debug("s %p s->p %p c_m %p\n",
3807 slave
->dev
->netdev_ops
->ndo_change_mtu
);
3809 res
= dev_set_mtu(slave
->dev
, new_mtu
);
3812 /* If we failed to set the slave's mtu to the new value
3813 * we must abort the operation even in ACTIVE_BACKUP
3814 * mode, because if we allow the backup slaves to have
3815 * different mtu values than the active slave we'll
3816 * need to change their mtu when doing a failover. That
3817 * means changing their mtu from timer context, which
3818 * is probably not a good idea.
3820 pr_debug("err %d %s\n", res
, slave
->dev
->name
);
3825 bond_dev
->mtu
= new_mtu
;
3830 /* unwind from head to the slave that failed */
3832 bond_for_each_slave_from_to(bond
, slave
, i
, bond
->first_slave
, stop_at
) {
3835 tmp_res
= dev_set_mtu(slave
->dev
, bond_dev
->mtu
);
3837 pr_debug("unwind err %d dev %s\n",
3838 tmp_res
, slave
->dev
->name
);
3848 * Note that many devices must be down to change the HW address, and
3849 * downing the master releases all slaves. We can make bonds full of
3850 * bonding devices to test this, however.
3852 static int bond_set_mac_address(struct net_device
*bond_dev
, void *addr
)
3854 struct bonding
*bond
= netdev_priv(bond_dev
);
3855 struct sockaddr
*sa
= addr
, tmp_sa
;
3856 struct slave
*slave
, *stop_at
;
3860 if (bond
->params
.mode
== BOND_MODE_ALB
)
3861 return bond_alb_set_mac_address(bond_dev
, addr
);
3864 pr_debug("bond=%p, name=%s\n",
3865 bond
, bond_dev
? bond_dev
->name
: "None");
3868 * If fail_over_mac is set to active, do nothing and return
3869 * success. Returning an error causes ifenslave to fail.
3871 if (bond
->params
.fail_over_mac
== BOND_FOM_ACTIVE
)
3874 if (!is_valid_ether_addr(sa
->sa_data
))
3875 return -EADDRNOTAVAIL
;
3877 /* Can't hold bond->lock with bh disabled here since
3878 * some base drivers panic. On the other hand we can't
3879 * hold bond->lock without bh disabled because we'll
3880 * deadlock. The only solution is to rely on the fact
3881 * that we're under rtnl_lock here, and the slaves
3882 * list won't change. This doesn't solve the problem
3883 * of setting the slave's hw address while it is
3884 * transmitting, but the assumption is that the base
3885 * driver can handle that.
3887 * TODO: figure out a way to safely iterate the slaves
3888 * list, but without holding a lock around the actual
3889 * call to the base driver.
3892 bond_for_each_slave(bond
, slave
, i
) {
3893 const struct net_device_ops
*slave_ops
= slave
->dev
->netdev_ops
;
3894 pr_debug("slave %p %s\n", slave
, slave
->dev
->name
);
3896 if (slave_ops
->ndo_set_mac_address
== NULL
) {
3898 pr_debug("EOPNOTSUPP %s\n", slave
->dev
->name
);
3902 res
= dev_set_mac_address(slave
->dev
, addr
);
3904 /* TODO: consider downing the slave
3906 * User should expect communications
3907 * breakage anyway until ARP finish
3910 pr_debug("err %d %s\n", res
, slave
->dev
->name
);
3916 memcpy(bond_dev
->dev_addr
, sa
->sa_data
, bond_dev
->addr_len
);
3920 memcpy(tmp_sa
.sa_data
, bond_dev
->dev_addr
, bond_dev
->addr_len
);
3921 tmp_sa
.sa_family
= bond_dev
->type
;
3923 /* unwind from head to the slave that failed */
3925 bond_for_each_slave_from_to(bond
, slave
, i
, bond
->first_slave
, stop_at
) {
3928 tmp_res
= dev_set_mac_address(slave
->dev
, &tmp_sa
);
3930 pr_debug("unwind err %d dev %s\n",
3931 tmp_res
, slave
->dev
->name
);
3938 static int bond_xmit_roundrobin(struct sk_buff
*skb
, struct net_device
*bond_dev
)
3940 struct bonding
*bond
= netdev_priv(bond_dev
);
3941 struct slave
*slave
, *start_at
;
3942 int i
, slave_no
, res
= 1;
3943 struct iphdr
*iph
= ip_hdr(skb
);
3946 * Start with the curr_active_slave that joined the bond as the
3947 * default for sending IGMP traffic. For failover purposes one
3948 * needs to maintain some consistency for the interface that will
3949 * send the join/membership reports. The curr_active_slave found
3950 * will send all of this type of traffic.
3952 if ((iph
->protocol
== IPPROTO_IGMP
) &&
3953 (skb
->protocol
== htons(ETH_P_IP
))) {
3955 read_lock(&bond
->curr_slave_lock
);
3956 slave
= bond
->curr_active_slave
;
3957 read_unlock(&bond
->curr_slave_lock
);
3963 * Concurrent TX may collide on rr_tx_counter; we accept
3964 * that as being rare enough not to justify using an
3967 slave_no
= bond
->rr_tx_counter
++ % bond
->slave_cnt
;
3969 bond_for_each_slave(bond
, slave
, i
) {
3977 bond_for_each_slave_from(bond
, slave
, i
, start_at
) {
3978 if (IS_UP(slave
->dev
) &&
3979 (slave
->link
== BOND_LINK_UP
) &&
3980 bond_is_active_slave(slave
)) {
3981 res
= bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
3988 /* no suitable interface, frame not sent */
3992 return NETDEV_TX_OK
;
3997 * in active-backup mode, we know that bond->curr_active_slave is always valid if
3998 * the bond has a usable interface.
4000 static int bond_xmit_activebackup(struct sk_buff
*skb
, struct net_device
*bond_dev
)
4002 struct bonding
*bond
= netdev_priv(bond_dev
);
4005 read_lock(&bond
->curr_slave_lock
);
4007 if (bond
->curr_active_slave
)
4008 res
= bond_dev_queue_xmit(bond
, skb
,
4009 bond
->curr_active_slave
->dev
);
4012 /* no suitable interface, frame not sent */
4015 read_unlock(&bond
->curr_slave_lock
);
4017 return NETDEV_TX_OK
;
4021 * In bond_xmit_xor() , we determine the output device by using a pre-
4022 * determined xmit_hash_policy(), If the selected device is not enabled,
4023 * find the next active slave.
4025 static int bond_xmit_xor(struct sk_buff
*skb
, struct net_device
*bond_dev
)
4027 struct bonding
*bond
= netdev_priv(bond_dev
);
4028 struct slave
*slave
, *start_at
;
4033 slave_no
= bond
->xmit_hash_policy(skb
, bond
->slave_cnt
);
4035 bond_for_each_slave(bond
, slave
, i
) {
4043 bond_for_each_slave_from(bond
, slave
, i
, start_at
) {
4044 if (IS_UP(slave
->dev
) &&
4045 (slave
->link
== BOND_LINK_UP
) &&
4046 bond_is_active_slave(slave
)) {
4047 res
= bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
4053 /* no suitable interface, frame not sent */
4057 return NETDEV_TX_OK
;
4061 * in broadcast mode, we send everything to all usable interfaces.
4063 static int bond_xmit_broadcast(struct sk_buff
*skb
, struct net_device
*bond_dev
)
4065 struct bonding
*bond
= netdev_priv(bond_dev
);
4066 struct slave
*slave
, *start_at
;
4067 struct net_device
*tx_dev
= NULL
;
4071 read_lock(&bond
->curr_slave_lock
);
4072 start_at
= bond
->curr_active_slave
;
4073 read_unlock(&bond
->curr_slave_lock
);
4078 bond_for_each_slave_from(bond
, slave
, i
, start_at
) {
4079 if (IS_UP(slave
->dev
) &&
4080 (slave
->link
== BOND_LINK_UP
) &&
4081 bond_is_active_slave(slave
)) {
4083 struct sk_buff
*skb2
= skb_clone(skb
, GFP_ATOMIC
);
4085 pr_err("%s: Error: bond_xmit_broadcast(): skb_clone() failed\n",
4090 res
= bond_dev_queue_xmit(bond
, skb2
, tx_dev
);
4092 dev_kfree_skb(skb2
);
4096 tx_dev
= slave
->dev
;
4101 res
= bond_dev_queue_xmit(bond
, skb
, tx_dev
);
4105 /* no suitable interface, frame not sent */
4108 /* frame sent to all suitable interfaces */
4109 return NETDEV_TX_OK
;
4112 /*------------------------- Device initialization ---------------------------*/
4114 static void bond_set_xmit_hash_policy(struct bonding
*bond
)
4116 switch (bond
->params
.xmit_policy
) {
4117 case BOND_XMIT_POLICY_LAYER23
:
4118 bond
->xmit_hash_policy
= bond_xmit_hash_policy_l23
;
4120 case BOND_XMIT_POLICY_LAYER34
:
4121 bond
->xmit_hash_policy
= bond_xmit_hash_policy_l34
;
4123 case BOND_XMIT_POLICY_LAYER2
:
4125 bond
->xmit_hash_policy
= bond_xmit_hash_policy_l2
;
4131 * Lookup the slave that corresponds to a qid
4133 static inline int bond_slave_override(struct bonding
*bond
,
4134 struct sk_buff
*skb
)
4137 struct slave
*slave
= NULL
;
4138 struct slave
*check_slave
;
4140 if (!skb
->queue_mapping
)
4143 /* Find out if any slaves have the same mapping as this skb. */
4144 bond_for_each_slave(bond
, check_slave
, i
) {
4145 if (check_slave
->queue_id
== skb
->queue_mapping
) {
4146 slave
= check_slave
;
4151 /* If the slave isn't UP, use default transmit policy. */
4152 if (slave
&& slave
->queue_id
&& IS_UP(slave
->dev
) &&
4153 (slave
->link
== BOND_LINK_UP
)) {
4154 res
= bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
4161 static u16
bond_select_queue(struct net_device
*dev
, struct sk_buff
*skb
)
4164 * This helper function exists to help dev_pick_tx get the correct
4165 * destination queue. Using a helper function skips a call to
4166 * skb_tx_hash and will put the skbs in the queue we expect on their
4167 * way down to the bonding driver.
4169 u16 txq
= skb_rx_queue_recorded(skb
) ? skb_get_rx_queue(skb
) : 0;
4172 * Save the original txq to restore before passing to the driver
4174 bond_queue_mapping(skb
) = skb
->queue_mapping
;
4176 if (unlikely(txq
>= dev
->real_num_tx_queues
)) {
4178 txq
-= dev
->real_num_tx_queues
;
4179 } while (txq
>= dev
->real_num_tx_queues
);
4184 static netdev_tx_t
__bond_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
4186 struct bonding
*bond
= netdev_priv(dev
);
4188 if (TX_QUEUE_OVERRIDE(bond
->params
.mode
)) {
4189 if (!bond_slave_override(bond
, skb
))
4190 return NETDEV_TX_OK
;
4193 switch (bond
->params
.mode
) {
4194 case BOND_MODE_ROUNDROBIN
:
4195 return bond_xmit_roundrobin(skb
, dev
);
4196 case BOND_MODE_ACTIVEBACKUP
:
4197 return bond_xmit_activebackup(skb
, dev
);
4199 return bond_xmit_xor(skb
, dev
);
4200 case BOND_MODE_BROADCAST
:
4201 return bond_xmit_broadcast(skb
, dev
);
4202 case BOND_MODE_8023AD
:
4203 return bond_3ad_xmit_xor(skb
, dev
);
4206 return bond_alb_xmit(skb
, dev
);
4208 /* Should never happen, mode already checked */
4209 pr_err("%s: Error: Unknown bonding mode %d\n",
4210 dev
->name
, bond
->params
.mode
);
4213 return NETDEV_TX_OK
;
4217 static netdev_tx_t
bond_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
4219 struct bonding
*bond
= netdev_priv(dev
);
4220 netdev_tx_t ret
= NETDEV_TX_OK
;
4223 * If we risk deadlock from transmitting this in the
4224 * netpoll path, tell netpoll to queue the frame for later tx
4226 if (is_netpoll_tx_blocked(dev
))
4227 return NETDEV_TX_BUSY
;
4229 read_lock(&bond
->lock
);
4231 if (bond
->slave_cnt
)
4232 ret
= __bond_start_xmit(skb
, dev
);
4236 read_unlock(&bond
->lock
);
4242 * set bond mode specific net device operations
4244 void bond_set_mode_ops(struct bonding
*bond
, int mode
)
4246 struct net_device
*bond_dev
= bond
->dev
;
4249 case BOND_MODE_ROUNDROBIN
:
4251 case BOND_MODE_ACTIVEBACKUP
:
4254 bond_set_xmit_hash_policy(bond
);
4256 case BOND_MODE_BROADCAST
:
4258 case BOND_MODE_8023AD
:
4259 bond_set_xmit_hash_policy(bond
);
4266 /* Should never happen, mode already checked */
4267 pr_err("%s: Error: Unknown bonding mode %d\n",
4268 bond_dev
->name
, mode
);
4273 static void bond_ethtool_get_drvinfo(struct net_device
*bond_dev
,
4274 struct ethtool_drvinfo
*drvinfo
)
4276 strncpy(drvinfo
->driver
, DRV_NAME
, 32);
4277 strncpy(drvinfo
->version
, DRV_VERSION
, 32);
4278 snprintf(drvinfo
->fw_version
, 32, "%d", BOND_ABI_VERSION
);
4281 static const struct ethtool_ops bond_ethtool_ops
= {
4282 .get_drvinfo
= bond_ethtool_get_drvinfo
,
4283 .get_link
= ethtool_op_get_link
,
4286 static const struct net_device_ops bond_netdev_ops
= {
4287 .ndo_init
= bond_init
,
4288 .ndo_uninit
= bond_uninit
,
4289 .ndo_open
= bond_open
,
4290 .ndo_stop
= bond_close
,
4291 .ndo_start_xmit
= bond_start_xmit
,
4292 .ndo_select_queue
= bond_select_queue
,
4293 .ndo_get_stats64
= bond_get_stats
,
4294 .ndo_do_ioctl
= bond_do_ioctl
,
4295 .ndo_change_rx_flags
= bond_change_rx_flags
,
4296 .ndo_set_rx_mode
= bond_set_multicast_list
,
4297 .ndo_change_mtu
= bond_change_mtu
,
4298 .ndo_set_mac_address
= bond_set_mac_address
,
4299 .ndo_neigh_setup
= bond_neigh_setup
,
4300 .ndo_vlan_rx_add_vid
= bond_vlan_rx_add_vid
,
4301 .ndo_vlan_rx_kill_vid
= bond_vlan_rx_kill_vid
,
4302 #ifdef CONFIG_NET_POLL_CONTROLLER
4303 .ndo_netpoll_setup
= bond_netpoll_setup
,
4304 .ndo_netpoll_cleanup
= bond_netpoll_cleanup
,
4305 .ndo_poll_controller
= bond_poll_controller
,
4307 .ndo_add_slave
= bond_enslave
,
4308 .ndo_del_slave
= bond_release
,
4309 .ndo_fix_features
= bond_fix_features
,
4312 static void bond_destructor(struct net_device
*bond_dev
)
4314 struct bonding
*bond
= netdev_priv(bond_dev
);
4316 destroy_workqueue(bond
->wq
);
4317 free_netdev(bond_dev
);
4320 static void bond_setup(struct net_device
*bond_dev
)
4322 struct bonding
*bond
= netdev_priv(bond_dev
);
4324 /* initialize rwlocks */
4325 rwlock_init(&bond
->lock
);
4326 rwlock_init(&bond
->curr_slave_lock
);
4328 bond
->params
= bonding_defaults
;
4330 /* Initialize pointers */
4331 bond
->dev
= bond_dev
;
4332 INIT_LIST_HEAD(&bond
->vlan_list
);
4334 /* Initialize the device entry points */
4335 ether_setup(bond_dev
);
4336 bond_dev
->netdev_ops
= &bond_netdev_ops
;
4337 bond_dev
->ethtool_ops
= &bond_ethtool_ops
;
4338 bond_set_mode_ops(bond
, bond
->params
.mode
);
4340 bond_dev
->destructor
= bond_destructor
;
4342 /* Initialize the device options */
4343 bond_dev
->tx_queue_len
= 0;
4344 bond_dev
->flags
|= IFF_MASTER
|IFF_MULTICAST
;
4345 bond_dev
->priv_flags
|= IFF_BONDING
;
4346 bond_dev
->priv_flags
&= ~(IFF_XMIT_DST_RELEASE
| IFF_TX_SKB_SHARING
);
4348 /* At first, we block adding VLANs. That's the only way to
4349 * prevent problems that occur when adding VLANs over an
4350 * empty bond. The block will be removed once non-challenged
4351 * slaves are enslaved.
4353 bond_dev
->features
|= NETIF_F_VLAN_CHALLENGED
;
4355 /* don't acquire bond device's netif_tx_lock when
4357 bond_dev
->features
|= NETIF_F_LLTX
;
4359 /* By default, we declare the bond to be fully
4360 * VLAN hardware accelerated capable. Special
4361 * care is taken in the various xmit functions
4362 * when there are slaves that are not hw accel
4366 bond_dev
->hw_features
= BOND_VLAN_FEATURES
|
4367 NETIF_F_HW_VLAN_TX
|
4368 NETIF_F_HW_VLAN_RX
|
4369 NETIF_F_HW_VLAN_FILTER
;
4371 bond_dev
->hw_features
&= ~(NETIF_F_ALL_CSUM
& ~NETIF_F_HW_CSUM
);
4372 bond_dev
->features
|= bond_dev
->hw_features
;
4375 static void bond_work_cancel_all(struct bonding
*bond
)
4377 if (bond
->params
.miimon
&& delayed_work_pending(&bond
->mii_work
))
4378 cancel_delayed_work_sync(&bond
->mii_work
);
4380 if (bond
->params
.arp_interval
&& delayed_work_pending(&bond
->arp_work
))
4381 cancel_delayed_work_sync(&bond
->arp_work
);
4383 if (bond
->params
.mode
== BOND_MODE_ALB
&&
4384 delayed_work_pending(&bond
->alb_work
))
4385 cancel_delayed_work_sync(&bond
->alb_work
);
4387 if (bond
->params
.mode
== BOND_MODE_8023AD
&&
4388 delayed_work_pending(&bond
->ad_work
))
4389 cancel_delayed_work_sync(&bond
->ad_work
);
4391 if (delayed_work_pending(&bond
->mcast_work
))
4392 cancel_delayed_work_sync(&bond
->mcast_work
);
4396 * Destroy a bonding device.
4397 * Must be under rtnl_lock when this function is called.
4399 static void bond_uninit(struct net_device
*bond_dev
)
4401 struct bonding
*bond
= netdev_priv(bond_dev
);
4402 struct vlan_entry
*vlan
, *tmp
;
4404 bond_netpoll_cleanup(bond_dev
);
4406 /* Release the bonded slaves */
4407 bond_release_all(bond_dev
);
4409 list_del(&bond
->bond_list
);
4411 bond_work_cancel_all(bond
);
4413 bond_remove_proc_entry(bond
);
4415 bond_debug_unregister(bond
);
4417 __hw_addr_flush(&bond
->mc_list
);
4419 list_for_each_entry_safe(vlan
, tmp
, &bond
->vlan_list
, vlan_list
) {
4420 list_del(&vlan
->vlan_list
);
4425 /*------------------------- Module initialization ---------------------------*/
4428 * Convert string input module parms. Accept either the
4429 * number of the mode or its string name. A bit complicated because
4430 * some mode names are substrings of other names, and calls from sysfs
4431 * may have whitespace in the name (trailing newlines, for example).
4433 int bond_parse_parm(const char *buf
, const struct bond_parm_tbl
*tbl
)
4435 int modeint
= -1, i
, rv
;
4436 char *p
, modestr
[BOND_MAX_MODENAME_LEN
+ 1] = { 0, };
4438 for (p
= (char *)buf
; *p
; p
++)
4439 if (!(isdigit(*p
) || isspace(*p
)))
4443 rv
= sscanf(buf
, "%20s", modestr
);
4445 rv
= sscanf(buf
, "%d", &modeint
);
4450 for (i
= 0; tbl
[i
].modename
; i
++) {
4451 if (modeint
== tbl
[i
].mode
)
4453 if (strcmp(modestr
, tbl
[i
].modename
) == 0)
4460 static int bond_check_params(struct bond_params
*params
)
4462 int arp_validate_value
, fail_over_mac_value
, primary_reselect_value
;
4465 * Convert string parameters.
4468 bond_mode
= bond_parse_parm(mode
, bond_mode_tbl
);
4469 if (bond_mode
== -1) {
4470 pr_err("Error: Invalid bonding mode \"%s\"\n",
4471 mode
== NULL
? "NULL" : mode
);
4476 if (xmit_hash_policy
) {
4477 if ((bond_mode
!= BOND_MODE_XOR
) &&
4478 (bond_mode
!= BOND_MODE_8023AD
)) {
4479 pr_info("xmit_hash_policy param is irrelevant in mode %s\n",
4480 bond_mode_name(bond_mode
));
4482 xmit_hashtype
= bond_parse_parm(xmit_hash_policy
,
4484 if (xmit_hashtype
== -1) {
4485 pr_err("Error: Invalid xmit_hash_policy \"%s\"\n",
4486 xmit_hash_policy
== NULL
? "NULL" :
4494 if (bond_mode
!= BOND_MODE_8023AD
) {
4495 pr_info("lacp_rate param is irrelevant in mode %s\n",
4496 bond_mode_name(bond_mode
));
4498 lacp_fast
= bond_parse_parm(lacp_rate
, bond_lacp_tbl
);
4499 if (lacp_fast
== -1) {
4500 pr_err("Error: Invalid lacp rate \"%s\"\n",
4501 lacp_rate
== NULL
? "NULL" : lacp_rate
);
4508 params
->ad_select
= bond_parse_parm(ad_select
, ad_select_tbl
);
4509 if (params
->ad_select
== -1) {
4510 pr_err("Error: Invalid ad_select \"%s\"\n",
4511 ad_select
== NULL
? "NULL" : ad_select
);
4515 if (bond_mode
!= BOND_MODE_8023AD
) {
4516 pr_warning("ad_select param only affects 802.3ad mode\n");
4519 params
->ad_select
= BOND_AD_STABLE
;
4522 if (max_bonds
< 0) {
4523 pr_warning("Warning: max_bonds (%d) not in range %d-%d, so it was reset to BOND_DEFAULT_MAX_BONDS (%d)\n",
4524 max_bonds
, 0, INT_MAX
, BOND_DEFAULT_MAX_BONDS
);
4525 max_bonds
= BOND_DEFAULT_MAX_BONDS
;
4529 pr_warning("Warning: miimon module parameter (%d), not in range 0-%d, so it was reset to %d\n",
4530 miimon
, INT_MAX
, BOND_LINK_MON_INTERV
);
4531 miimon
= BOND_LINK_MON_INTERV
;
4535 pr_warning("Warning: updelay module parameter (%d), not in range 0-%d, so it was reset to 0\n",
4540 if (downdelay
< 0) {
4541 pr_warning("Warning: downdelay module parameter (%d), not in range 0-%d, so it was reset to 0\n",
4542 downdelay
, INT_MAX
);
4546 if ((use_carrier
!= 0) && (use_carrier
!= 1)) {
4547 pr_warning("Warning: use_carrier module parameter (%d), not of valid value (0/1), so it was set to 1\n",
4552 if (num_peer_notif
< 0 || num_peer_notif
> 255) {
4553 pr_warning("Warning: num_grat_arp/num_unsol_na (%d) not in range 0-255 so it was reset to 1\n",
4558 /* reset values for 802.3ad */
4559 if (bond_mode
== BOND_MODE_8023AD
) {
4561 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");
4562 pr_warning("Forcing miimon to 100msec\n");
4567 if (tx_queues
< 1 || tx_queues
> 255) {
4568 pr_warning("Warning: tx_queues (%d) should be between "
4569 "1 and 255, resetting to %d\n",
4570 tx_queues
, BOND_DEFAULT_TX_QUEUES
);
4571 tx_queues
= BOND_DEFAULT_TX_QUEUES
;
4574 if ((all_slaves_active
!= 0) && (all_slaves_active
!= 1)) {
4575 pr_warning("Warning: all_slaves_active module parameter (%d), "
4576 "not of valid value (0/1), so it was set to "
4577 "0\n", all_slaves_active
);
4578 all_slaves_active
= 0;
4581 if (resend_igmp
< 0 || resend_igmp
> 255) {
4582 pr_warning("Warning: resend_igmp (%d) should be between "
4583 "0 and 255, resetting to %d\n",
4584 resend_igmp
, BOND_DEFAULT_RESEND_IGMP
);
4585 resend_igmp
= BOND_DEFAULT_RESEND_IGMP
;
4588 /* reset values for TLB/ALB */
4589 if ((bond_mode
== BOND_MODE_TLB
) ||
4590 (bond_mode
== BOND_MODE_ALB
)) {
4592 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");
4593 pr_warning("Forcing miimon to 100msec\n");
4598 if (bond_mode
== BOND_MODE_ALB
) {
4599 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",
4604 if (updelay
|| downdelay
) {
4605 /* just warn the user the up/down delay will have
4606 * no effect since miimon is zero...
4608 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",
4609 updelay
, downdelay
);
4612 /* don't allow arp monitoring */
4614 pr_warning("Warning: miimon (%d) and arp_interval (%d) can't be used simultaneously, disabling ARP monitoring\n",
4615 miimon
, arp_interval
);
4619 if ((updelay
% miimon
) != 0) {
4620 pr_warning("Warning: updelay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
4622 (updelay
/ miimon
) * miimon
);
4627 if ((downdelay
% miimon
) != 0) {
4628 pr_warning("Warning: downdelay (%d) is not a multiple of miimon (%d), downdelay rounded to %d ms\n",
4630 (downdelay
/ miimon
) * miimon
);
4633 downdelay
/= miimon
;
4636 if (arp_interval
< 0) {
4637 pr_warning("Warning: arp_interval module parameter (%d) , not in range 0-%d, so it was reset to %d\n",
4638 arp_interval
, INT_MAX
, BOND_LINK_ARP_INTERV
);
4639 arp_interval
= BOND_LINK_ARP_INTERV
;
4642 for (arp_ip_count
= 0;
4643 (arp_ip_count
< BOND_MAX_ARP_TARGETS
) && arp_ip_target
[arp_ip_count
];
4645 /* not complete check, but should be good enough to
4647 if (!isdigit(arp_ip_target
[arp_ip_count
][0])) {
4648 pr_warning("Warning: bad arp_ip_target module parameter (%s), ARP monitoring will not be performed\n",
4649 arp_ip_target
[arp_ip_count
]);
4652 __be32 ip
= in_aton(arp_ip_target
[arp_ip_count
]);
4653 arp_target
[arp_ip_count
] = ip
;
4657 if (arp_interval
&& !arp_ip_count
) {
4658 /* don't allow arping if no arp_ip_target given... */
4659 pr_warning("Warning: arp_interval module parameter (%d) specified without providing an arp_ip_target parameter, arp_interval was reset to 0\n",
4665 if (bond_mode
!= BOND_MODE_ACTIVEBACKUP
) {
4666 pr_err("arp_validate only supported in active-backup mode\n");
4669 if (!arp_interval
) {
4670 pr_err("arp_validate requires arp_interval\n");
4674 arp_validate_value
= bond_parse_parm(arp_validate
,
4676 if (arp_validate_value
== -1) {
4677 pr_err("Error: invalid arp_validate \"%s\"\n",
4678 arp_validate
== NULL
? "NULL" : arp_validate
);
4682 arp_validate_value
= 0;
4685 pr_info("MII link monitoring set to %d ms\n", miimon
);
4686 } else if (arp_interval
) {
4689 pr_info("ARP monitoring set to %d ms, validate %s, with %d target(s):",
4691 arp_validate_tbl
[arp_validate_value
].modename
,
4694 for (i
= 0; i
< arp_ip_count
; i
++)
4695 pr_info(" %s", arp_ip_target
[i
]);
4699 } else if (max_bonds
) {
4700 /* miimon and arp_interval not set, we need one so things
4701 * work as expected, see bonding.txt for details
4703 pr_debug("Warning: either miimon or arp_interval and arp_ip_target module parameters must be specified, otherwise bonding will not detect link failures! see bonding.txt for details.\n");
4706 if (primary
&& !USES_PRIMARY(bond_mode
)) {
4707 /* currently, using a primary only makes sense
4708 * in active backup, TLB or ALB modes
4710 pr_warning("Warning: %s primary device specified but has no effect in %s mode\n",
4711 primary
, bond_mode_name(bond_mode
));
4715 if (primary
&& primary_reselect
) {
4716 primary_reselect_value
= bond_parse_parm(primary_reselect
,
4718 if (primary_reselect_value
== -1) {
4719 pr_err("Error: Invalid primary_reselect \"%s\"\n",
4721 NULL
? "NULL" : primary_reselect
);
4725 primary_reselect_value
= BOND_PRI_RESELECT_ALWAYS
;
4728 if (fail_over_mac
) {
4729 fail_over_mac_value
= bond_parse_parm(fail_over_mac
,
4731 if (fail_over_mac_value
== -1) {
4732 pr_err("Error: invalid fail_over_mac \"%s\"\n",
4733 arp_validate
== NULL
? "NULL" : arp_validate
);
4737 if (bond_mode
!= BOND_MODE_ACTIVEBACKUP
)
4738 pr_warning("Warning: fail_over_mac only affects active-backup mode.\n");
4740 fail_over_mac_value
= BOND_FOM_NONE
;
4743 /* fill params struct with the proper values */
4744 params
->mode
= bond_mode
;
4745 params
->xmit_policy
= xmit_hashtype
;
4746 params
->miimon
= miimon
;
4747 params
->num_peer_notif
= num_peer_notif
;
4748 params
->arp_interval
= arp_interval
;
4749 params
->arp_validate
= arp_validate_value
;
4750 params
->updelay
= updelay
;
4751 params
->downdelay
= downdelay
;
4752 params
->use_carrier
= use_carrier
;
4753 params
->lacp_fast
= lacp_fast
;
4754 params
->primary
[0] = 0;
4755 params
->primary_reselect
= primary_reselect_value
;
4756 params
->fail_over_mac
= fail_over_mac_value
;
4757 params
->tx_queues
= tx_queues
;
4758 params
->all_slaves_active
= all_slaves_active
;
4759 params
->resend_igmp
= resend_igmp
;
4760 params
->min_links
= min_links
;
4763 strncpy(params
->primary
, primary
, IFNAMSIZ
);
4764 params
->primary
[IFNAMSIZ
- 1] = 0;
4767 memcpy(params
->arp_targets
, arp_target
, sizeof(arp_target
));
4772 static struct lock_class_key bonding_netdev_xmit_lock_key
;
4773 static struct lock_class_key bonding_netdev_addr_lock_key
;
4775 static void bond_set_lockdep_class_one(struct net_device
*dev
,
4776 struct netdev_queue
*txq
,
4779 lockdep_set_class(&txq
->_xmit_lock
,
4780 &bonding_netdev_xmit_lock_key
);
4783 static void bond_set_lockdep_class(struct net_device
*dev
)
4785 lockdep_set_class(&dev
->addr_list_lock
,
4786 &bonding_netdev_addr_lock_key
);
4787 netdev_for_each_tx_queue(dev
, bond_set_lockdep_class_one
, NULL
);
4791 * Called from registration process
4793 static int bond_init(struct net_device
*bond_dev
)
4795 struct bonding
*bond
= netdev_priv(bond_dev
);
4796 struct bond_net
*bn
= net_generic(dev_net(bond_dev
), bond_net_id
);
4797 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
4799 pr_debug("Begin bond_init for %s\n", bond_dev
->name
);
4802 * Initialize locks that may be required during
4803 * en/deslave operations. All of the bond_open work
4804 * (of which this is part) should really be moved to
4805 * a phase prior to dev_open
4807 spin_lock_init(&(bond_info
->tx_hashtbl_lock
));
4808 spin_lock_init(&(bond_info
->rx_hashtbl_lock
));
4810 bond
->wq
= create_singlethread_workqueue(bond_dev
->name
);
4814 bond_set_lockdep_class(bond_dev
);
4816 bond_create_proc_entry(bond
);
4817 list_add_tail(&bond
->bond_list
, &bn
->dev_list
);
4819 bond_prepare_sysfs_group(bond
);
4821 bond_debug_register(bond
);
4823 __hw_addr_init(&bond
->mc_list
);
4827 static int bond_validate(struct nlattr
*tb
[], struct nlattr
*data
[])
4829 if (tb
[IFLA_ADDRESS
]) {
4830 if (nla_len(tb
[IFLA_ADDRESS
]) != ETH_ALEN
)
4832 if (!is_valid_ether_addr(nla_data(tb
[IFLA_ADDRESS
])))
4833 return -EADDRNOTAVAIL
;
4838 static int bond_get_tx_queues(struct net
*net
, struct nlattr
*tb
[])
4843 static struct rtnl_link_ops bond_link_ops __read_mostly
= {
4845 .priv_size
= sizeof(struct bonding
),
4846 .setup
= bond_setup
,
4847 .validate
= bond_validate
,
4848 .get_tx_queues
= bond_get_tx_queues
,
4851 /* Create a new bond based on the specified name and bonding parameters.
4852 * If name is NULL, obtain a suitable "bond%d" name for us.
4853 * Caller must NOT hold rtnl_lock; we need to release it here before we
4854 * set up our sysfs entries.
4856 int bond_create(struct net
*net
, const char *name
)
4858 struct net_device
*bond_dev
;
4863 bond_dev
= alloc_netdev_mq(sizeof(struct bonding
),
4864 name
? name
: "bond%d",
4865 bond_setup
, tx_queues
);
4867 pr_err("%s: eek! can't alloc netdev!\n", name
);
4872 dev_net_set(bond_dev
, net
);
4873 bond_dev
->rtnl_link_ops
= &bond_link_ops
;
4875 res
= register_netdevice(bond_dev
);
4877 netif_carrier_off(bond_dev
);
4881 bond_destructor(bond_dev
);
4885 static int __net_init
bond_net_init(struct net
*net
)
4887 struct bond_net
*bn
= net_generic(net
, bond_net_id
);
4890 INIT_LIST_HEAD(&bn
->dev_list
);
4892 bond_create_proc_dir(bn
);
4893 bond_create_sysfs(bn
);
4898 static void __net_exit
bond_net_exit(struct net
*net
)
4900 struct bond_net
*bn
= net_generic(net
, bond_net_id
);
4902 bond_destroy_sysfs(bn
);
4903 bond_destroy_proc_dir(bn
);
4906 static struct pernet_operations bond_net_ops
= {
4907 .init
= bond_net_init
,
4908 .exit
= bond_net_exit
,
4910 .size
= sizeof(struct bond_net
),
4913 static int __init
bonding_init(void)
4918 pr_info("%s", bond_version
);
4920 res
= bond_check_params(&bonding_defaults
);
4924 res
= register_pernet_subsys(&bond_net_ops
);
4928 res
= rtnl_link_register(&bond_link_ops
);
4932 bond_create_debugfs();
4934 for (i
= 0; i
< max_bonds
; i
++) {
4935 res
= bond_create(&init_net
, NULL
);
4940 register_netdevice_notifier(&bond_netdev_notifier
);
4944 rtnl_link_unregister(&bond_link_ops
);
4946 unregister_pernet_subsys(&bond_net_ops
);
4951 static void __exit
bonding_exit(void)
4953 unregister_netdevice_notifier(&bond_netdev_notifier
);
4955 bond_destroy_debugfs();
4957 rtnl_link_unregister(&bond_link_ops
);
4958 unregister_pernet_subsys(&bond_net_ops
);
4960 #ifdef CONFIG_NET_POLL_CONTROLLER
4962 * Make sure we don't have an imbalance on our netpoll blocking
4964 WARN_ON(atomic_read(&netpoll_block_tx
));
4968 module_init(bonding_init
);
4969 module_exit(bonding_exit
);
4970 MODULE_LICENSE("GPL");
4971 MODULE_VERSION(DRV_VERSION
);
4972 MODULE_DESCRIPTION(DRV_DESCRIPTION
", v" DRV_VERSION
);
4973 MODULE_AUTHOR("Thomas Davis, tadavis@lbl.gov and many others");
4974 MODULE_ALIAS_RTNL_LINK("bond");