2 * originally based on the dummy device.
4 * Copyright 1999, Thomas Davis, tadavis@lbl.gov.
5 * Licensed under the GPL. Based on dummy.c, and eql.c devices.
7 * bonding.c: an Ethernet Bonding driver
9 * This is useful to talk to a Cisco EtherChannel compatible equipment:
11 * Sun Trunking (Solaris)
12 * Alteon AceDirector Trunks
14 * and probably many L2 switches ...
17 * ifconfig bond0 ipaddress netmask up
18 * will setup a network device, with an ip address. No mac address
19 * will be assigned at this time. The hw mac address will come from
20 * the first slave bonded to the channel. All slaves will then use
21 * this hw mac address.
24 * will release all slaves, marking them as down.
26 * ifenslave bond0 eth0
27 * will attach eth0 to bond0 as a slave. eth0 hw mac address will either
28 * a: be used as initial mac address
29 * b: if a hw mac address already is there, eth0's hw mac address
30 * will then be set from bond0.
34 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
36 #include <linux/kernel.h>
37 #include <linux/module.h>
38 #include <linux/types.h>
39 #include <linux/fcntl.h>
40 #include <linux/interrupt.h>
41 #include <linux/ptrace.h>
42 #include <linux/ioport.h>
46 #include <linux/tcp.h>
47 #include <linux/udp.h>
48 #include <linux/slab.h>
49 #include <linux/string.h>
50 #include <linux/init.h>
51 #include <linux/timer.h>
52 #include <linux/socket.h>
53 #include <linux/ctype.h>
54 #include <linux/inet.h>
55 #include <linux/bitops.h>
58 #include <linux/uaccess.h>
59 #include <linux/errno.h>
60 #include <linux/netdevice.h>
61 #include <linux/inetdevice.h>
62 #include <linux/igmp.h>
63 #include <linux/etherdevice.h>
64 #include <linux/skbuff.h>
66 #include <linux/rtnetlink.h>
67 #include <linux/smp.h>
68 #include <linux/if_ether.h>
70 #include <linux/mii.h>
71 #include <linux/ethtool.h>
72 #include <linux/if_vlan.h>
73 #include <linux/if_bonding.h>
74 #include <linux/jiffies.h>
75 #include <linux/preempt.h>
76 #include <net/route.h>
77 #include <net/net_namespace.h>
78 #include <net/netns/generic.h>
79 #include <net/pkt_sched.h>
84 /*---------------------------- Module parameters ----------------------------*/
86 /* monitor all links that often (in milliseconds). <=0 disables monitoring */
87 #define BOND_LINK_MON_INTERV 0
88 #define BOND_LINK_ARP_INTERV 0
90 static int max_bonds
= BOND_DEFAULT_MAX_BONDS
;
91 static int tx_queues
= BOND_DEFAULT_TX_QUEUES
;
92 static int num_peer_notif
= 1;
93 static int miimon
= BOND_LINK_MON_INTERV
;
96 static int use_carrier
= 1;
99 static char *primary_reselect
;
100 static char *lacp_rate
;
101 static int min_links
;
102 static char *ad_select
;
103 static char *xmit_hash_policy
;
104 static int arp_interval
= BOND_LINK_ARP_INTERV
;
105 static char *arp_ip_target
[BOND_MAX_ARP_TARGETS
];
106 static char *arp_validate
;
107 static char *arp_all_targets
;
108 static char *fail_over_mac
;
109 static int all_slaves_active
= 0;
110 static struct bond_params bonding_defaults
;
111 static int resend_igmp
= BOND_DEFAULT_RESEND_IGMP
;
113 module_param(max_bonds
, int, 0);
114 MODULE_PARM_DESC(max_bonds
, "Max number of bonded devices");
115 module_param(tx_queues
, int, 0);
116 MODULE_PARM_DESC(tx_queues
, "Max number of transmit queues (default = 16)");
117 module_param_named(num_grat_arp
, num_peer_notif
, int, 0644);
118 MODULE_PARM_DESC(num_grat_arp
, "Number of peer notifications to send on "
119 "failover event (alias of num_unsol_na)");
120 module_param_named(num_unsol_na
, num_peer_notif
, int, 0644);
121 MODULE_PARM_DESC(num_unsol_na
, "Number of peer notifications to send on "
122 "failover event (alias of num_grat_arp)");
123 module_param(miimon
, int, 0);
124 MODULE_PARM_DESC(miimon
, "Link check interval in milliseconds");
125 module_param(updelay
, int, 0);
126 MODULE_PARM_DESC(updelay
, "Delay before considering link up, in milliseconds");
127 module_param(downdelay
, int, 0);
128 MODULE_PARM_DESC(downdelay
, "Delay before considering link down, "
130 module_param(use_carrier
, int, 0);
131 MODULE_PARM_DESC(use_carrier
, "Use netif_carrier_ok (vs MII ioctls) in miimon; "
132 "0 for off, 1 for on (default)");
133 module_param(mode
, charp
, 0);
134 MODULE_PARM_DESC(mode
, "Mode of operation; 0 for balance-rr, "
135 "1 for active-backup, 2 for balance-xor, "
136 "3 for broadcast, 4 for 802.3ad, 5 for balance-tlb, "
137 "6 for balance-alb");
138 module_param(primary
, charp
, 0);
139 MODULE_PARM_DESC(primary
, "Primary network device to use");
140 module_param(primary_reselect
, charp
, 0);
141 MODULE_PARM_DESC(primary_reselect
, "Reselect primary slave "
143 "0 for always (default), "
144 "1 for only if speed of primary is "
146 "2 for only on active slave "
148 module_param(lacp_rate
, charp
, 0);
149 MODULE_PARM_DESC(lacp_rate
, "LACPDU tx rate to request from 802.3ad partner; "
150 "0 for slow, 1 for fast");
151 module_param(ad_select
, charp
, 0);
152 MODULE_PARM_DESC(ad_select
, "803.ad aggregation selection logic; "
153 "0 for stable (default), 1 for bandwidth, "
155 module_param(min_links
, int, 0);
156 MODULE_PARM_DESC(min_links
, "Minimum number of available links before turning on carrier");
158 module_param(xmit_hash_policy
, charp
, 0);
159 MODULE_PARM_DESC(xmit_hash_policy
, "balance-xor and 802.3ad hashing method; "
160 "0 for layer 2 (default), 1 for layer 3+4, "
162 module_param(arp_interval
, int, 0);
163 MODULE_PARM_DESC(arp_interval
, "arp interval in milliseconds");
164 module_param_array(arp_ip_target
, charp
, NULL
, 0);
165 MODULE_PARM_DESC(arp_ip_target
, "arp targets in n.n.n.n form");
166 module_param(arp_validate
, charp
, 0);
167 MODULE_PARM_DESC(arp_validate
, "validate src/dst of ARP probes; "
168 "0 for none (default), 1 for active, "
169 "2 for backup, 3 for all");
170 module_param(arp_all_targets
, charp
, 0);
171 MODULE_PARM_DESC(arp_all_targets
, "fail on any/all arp targets timeout; 0 for any (default), 1 for all");
172 module_param(fail_over_mac
, charp
, 0);
173 MODULE_PARM_DESC(fail_over_mac
, "For active-backup, do not set all slaves to "
174 "the same MAC; 0 for none (default), "
175 "1 for active, 2 for follow");
176 module_param(all_slaves_active
, int, 0);
177 MODULE_PARM_DESC(all_slaves_active
, "Keep all frames received on an interface"
178 "by setting active flag for all slaves; "
179 "0 for never (default), 1 for always.");
180 module_param(resend_igmp
, int, 0);
181 MODULE_PARM_DESC(resend_igmp
, "Number of IGMP membership reports to send on "
184 /*----------------------------- Global variables ----------------------------*/
186 #ifdef CONFIG_NET_POLL_CONTROLLER
187 atomic_t netpoll_block_tx
= ATOMIC_INIT(0);
190 int bond_net_id __read_mostly
;
192 static __be32 arp_target
[BOND_MAX_ARP_TARGETS
];
193 static int arp_ip_count
;
194 static int bond_mode
= BOND_MODE_ROUNDROBIN
;
195 static int xmit_hashtype
= BOND_XMIT_POLICY_LAYER2
;
196 static int lacp_fast
;
198 const struct bond_parm_tbl bond_lacp_tbl
[] = {
199 { "slow", AD_LACP_SLOW
},
200 { "fast", AD_LACP_FAST
},
204 const struct bond_parm_tbl bond_mode_tbl
[] = {
205 { "balance-rr", BOND_MODE_ROUNDROBIN
},
206 { "active-backup", BOND_MODE_ACTIVEBACKUP
},
207 { "balance-xor", BOND_MODE_XOR
},
208 { "broadcast", BOND_MODE_BROADCAST
},
209 { "802.3ad", BOND_MODE_8023AD
},
210 { "balance-tlb", BOND_MODE_TLB
},
211 { "balance-alb", BOND_MODE_ALB
},
215 const struct bond_parm_tbl xmit_hashtype_tbl
[] = {
216 { "layer2", BOND_XMIT_POLICY_LAYER2
},
217 { "layer3+4", BOND_XMIT_POLICY_LAYER34
},
218 { "layer2+3", BOND_XMIT_POLICY_LAYER23
},
222 const struct bond_parm_tbl arp_all_targets_tbl
[] = {
223 { "any", BOND_ARP_TARGETS_ANY
},
224 { "all", BOND_ARP_TARGETS_ALL
},
228 const struct bond_parm_tbl arp_validate_tbl
[] = {
229 { "none", BOND_ARP_VALIDATE_NONE
},
230 { "active", BOND_ARP_VALIDATE_ACTIVE
},
231 { "backup", BOND_ARP_VALIDATE_BACKUP
},
232 { "all", BOND_ARP_VALIDATE_ALL
},
236 const struct bond_parm_tbl fail_over_mac_tbl
[] = {
237 { "none", BOND_FOM_NONE
},
238 { "active", BOND_FOM_ACTIVE
},
239 { "follow", BOND_FOM_FOLLOW
},
243 const struct bond_parm_tbl pri_reselect_tbl
[] = {
244 { "always", BOND_PRI_RESELECT_ALWAYS
},
245 { "better", BOND_PRI_RESELECT_BETTER
},
246 { "failure", BOND_PRI_RESELECT_FAILURE
},
250 struct bond_parm_tbl ad_select_tbl
[] = {
251 { "stable", BOND_AD_STABLE
},
252 { "bandwidth", BOND_AD_BANDWIDTH
},
253 { "count", BOND_AD_COUNT
},
257 /*-------------------------- Forward declarations ---------------------------*/
259 static int bond_init(struct net_device
*bond_dev
);
260 static void bond_uninit(struct net_device
*bond_dev
);
262 /*---------------------------- General routines -----------------------------*/
264 const char *bond_mode_name(int mode
)
266 static const char *names
[] = {
267 [BOND_MODE_ROUNDROBIN
] = "load balancing (round-robin)",
268 [BOND_MODE_ACTIVEBACKUP
] = "fault-tolerance (active-backup)",
269 [BOND_MODE_XOR
] = "load balancing (xor)",
270 [BOND_MODE_BROADCAST
] = "fault-tolerance (broadcast)",
271 [BOND_MODE_8023AD
] = "IEEE 802.3ad Dynamic link aggregation",
272 [BOND_MODE_TLB
] = "transmit load balancing",
273 [BOND_MODE_ALB
] = "adaptive load balancing",
276 if (mode
< 0 || mode
> BOND_MODE_ALB
)
282 /*---------------------------------- VLAN -----------------------------------*/
285 * bond_add_vlan - add a new vlan id on bond
286 * @bond: bond that got the notification
287 * @vlan_id: the vlan id to add
289 * Returns -ENOMEM if allocation failed.
291 static int bond_add_vlan(struct bonding
*bond
, unsigned short vlan_id
)
293 struct vlan_entry
*vlan
;
295 pr_debug("bond: %s, vlan id %d\n",
296 (bond
? bond
->dev
->name
: "None"), vlan_id
);
298 vlan
= kzalloc(sizeof(struct vlan_entry
), GFP_KERNEL
);
302 INIT_LIST_HEAD(&vlan
->vlan_list
);
303 vlan
->vlan_id
= vlan_id
;
305 write_lock_bh(&bond
->lock
);
307 list_add_tail(&vlan
->vlan_list
, &bond
->vlan_list
);
309 write_unlock_bh(&bond
->lock
);
311 pr_debug("added VLAN ID %d on bond %s\n", vlan_id
, bond
->dev
->name
);
317 * bond_del_vlan - delete a vlan id from bond
318 * @bond: bond that got the notification
319 * @vlan_id: the vlan id to delete
321 * returns -ENODEV if @vlan_id was not found in @bond.
323 static int bond_del_vlan(struct bonding
*bond
, unsigned short vlan_id
)
325 struct vlan_entry
*vlan
;
328 pr_debug("bond: %s, vlan id %d\n", bond
->dev
->name
, vlan_id
);
331 write_lock_bh(&bond
->lock
);
333 list_for_each_entry(vlan
, &bond
->vlan_list
, vlan_list
) {
334 if (vlan
->vlan_id
== vlan_id
) {
335 list_del(&vlan
->vlan_list
);
337 if (bond_is_lb(bond
))
338 bond_alb_clear_vlan(bond
, vlan_id
);
340 pr_debug("removed VLAN ID %d from bond %s\n",
341 vlan_id
, bond
->dev
->name
);
350 pr_debug("couldn't find VLAN ID %d in bond %s\n",
351 vlan_id
, bond
->dev
->name
);
354 write_unlock_bh(&bond
->lock
);
355 unblock_netpoll_tx();
360 * bond_next_vlan - safely skip to the next item in the vlans list.
361 * @bond: the bond we're working on
362 * @curr: item we're advancing from
364 * Returns %NULL if list is empty, bond->next_vlan if @curr is %NULL,
365 * or @curr->next otherwise (even if it is @curr itself again).
367 * Caller must hold bond->lock
369 struct vlan_entry
*bond_next_vlan(struct bonding
*bond
, struct vlan_entry
*curr
)
371 struct vlan_entry
*next
, *last
;
373 if (list_empty(&bond
->vlan_list
))
377 next
= list_entry(bond
->vlan_list
.next
,
378 struct vlan_entry
, vlan_list
);
380 last
= list_entry(bond
->vlan_list
.prev
,
381 struct vlan_entry
, vlan_list
);
383 next
= list_entry(bond
->vlan_list
.next
,
384 struct vlan_entry
, vlan_list
);
386 next
= list_entry(curr
->vlan_list
.next
,
387 struct vlan_entry
, vlan_list
);
395 * bond_dev_queue_xmit - Prepare skb for xmit.
397 * @bond: bond device that got this skb for tx.
398 * @skb: hw accel VLAN tagged skb to transmit
399 * @slave_dev: slave that is supposed to xmit this skbuff
401 int bond_dev_queue_xmit(struct bonding
*bond
, struct sk_buff
*skb
,
402 struct net_device
*slave_dev
)
404 skb
->dev
= slave_dev
;
406 BUILD_BUG_ON(sizeof(skb
->queue_mapping
) !=
407 sizeof(qdisc_skb_cb(skb
)->slave_dev_queue_mapping
));
408 skb
->queue_mapping
= qdisc_skb_cb(skb
)->slave_dev_queue_mapping
;
410 if (unlikely(netpoll_tx_running(bond
->dev
)))
411 bond_netpoll_send_skb(bond_get_slave_by_dev(bond
, slave_dev
), skb
);
419 * In the following 2 functions, bond_vlan_rx_add_vid and bond_vlan_rx_kill_vid,
420 * We don't protect the slave list iteration with a lock because:
421 * a. This operation is performed in IOCTL context,
422 * b. The operation is protected by the RTNL semaphore in the 8021q code,
423 * c. Holding a lock with BH disabled while directly calling a base driver
424 * entry point is generally a BAD idea.
426 * The design of synchronization/protection for this operation in the 8021q
427 * module is good for one or more VLAN devices over a single physical device
428 * and cannot be extended for a teaming solution like bonding, so there is a
429 * potential race condition here where a net device from the vlan group might
430 * be referenced (either by a base driver or the 8021q code) while it is being
431 * removed from the system. However, it turns out we're not making matters
432 * worse, and if it works for regular VLAN usage it will work here too.
436 * bond_vlan_rx_add_vid - Propagates adding an id to slaves
437 * @bond_dev: bonding net device that got called
438 * @vid: vlan id being added
440 static int bond_vlan_rx_add_vid(struct net_device
*bond_dev
,
441 __be16 proto
, u16 vid
)
443 struct bonding
*bond
= netdev_priv(bond_dev
);
444 struct slave
*slave
, *stop_at
;
447 bond_for_each_slave(bond
, slave
, i
) {
448 res
= vlan_vid_add(slave
->dev
, proto
, vid
);
453 res
= bond_add_vlan(bond
, vid
);
455 pr_err("%s: Error: Failed to add vlan id %d\n",
456 bond_dev
->name
, vid
);
463 /* unwind from head to the slave that failed */
465 bond_for_each_slave_from_to(bond
, slave
, i
, bond
->first_slave
, stop_at
)
466 vlan_vid_del(slave
->dev
, proto
, vid
);
472 * bond_vlan_rx_kill_vid - Propagates deleting an id to slaves
473 * @bond_dev: bonding net device that got called
474 * @vid: vlan id being removed
476 static int bond_vlan_rx_kill_vid(struct net_device
*bond_dev
,
477 __be16 proto
, u16 vid
)
479 struct bonding
*bond
= netdev_priv(bond_dev
);
483 bond_for_each_slave(bond
, slave
, i
)
484 vlan_vid_del(slave
->dev
, proto
, vid
);
486 res
= bond_del_vlan(bond
, vid
);
488 pr_err("%s: Error: Failed to remove vlan id %d\n",
489 bond_dev
->name
, vid
);
496 static void bond_add_vlans_on_slave(struct bonding
*bond
, struct net_device
*slave_dev
)
498 struct vlan_entry
*vlan
;
501 list_for_each_entry(vlan
, &bond
->vlan_list
, vlan_list
) {
502 res
= vlan_vid_add(slave_dev
, htons(ETH_P_8021Q
),
505 pr_warning("%s: Failed to add vlan id %d to device %s\n",
506 bond
->dev
->name
, vlan
->vlan_id
,
511 static void bond_del_vlans_from_slave(struct bonding
*bond
,
512 struct net_device
*slave_dev
)
514 struct vlan_entry
*vlan
;
516 list_for_each_entry(vlan
, &bond
->vlan_list
, vlan_list
) {
519 vlan_vid_del(slave_dev
, htons(ETH_P_8021Q
), vlan
->vlan_id
);
523 /*------------------------------- Link status -------------------------------*/
526 * Set the carrier state for the master according to the state of its
527 * slaves. If any slaves are up, the master is up. In 802.3ad mode,
528 * do special 802.3ad magic.
530 * Returns zero if carrier state does not change, nonzero if it does.
532 static int bond_set_carrier(struct bonding
*bond
)
537 if (bond
->slave_cnt
== 0)
540 if (bond
->params
.mode
== BOND_MODE_8023AD
)
541 return bond_3ad_set_carrier(bond
);
543 bond_for_each_slave(bond
, slave
, i
) {
544 if (slave
->link
== BOND_LINK_UP
) {
545 if (!netif_carrier_ok(bond
->dev
)) {
546 netif_carrier_on(bond
->dev
);
554 if (netif_carrier_ok(bond
->dev
)) {
555 netif_carrier_off(bond
->dev
);
562 * Get link speed and duplex from the slave's base driver
563 * using ethtool. If for some reason the call fails or the
564 * values are invalid, set speed and duplex to -1,
567 static void bond_update_speed_duplex(struct slave
*slave
)
569 struct net_device
*slave_dev
= slave
->dev
;
570 struct ethtool_cmd ecmd
;
574 slave
->speed
= SPEED_UNKNOWN
;
575 slave
->duplex
= DUPLEX_UNKNOWN
;
577 res
= __ethtool_get_settings(slave_dev
, &ecmd
);
581 slave_speed
= ethtool_cmd_speed(&ecmd
);
582 if (slave_speed
== 0 || slave_speed
== ((__u32
) -1))
585 switch (ecmd
.duplex
) {
593 slave
->speed
= slave_speed
;
594 slave
->duplex
= ecmd
.duplex
;
600 * if <dev> supports MII link status reporting, check its link status.
602 * We either do MII/ETHTOOL ioctls, or check netif_carrier_ok(),
603 * depending upon the setting of the use_carrier parameter.
605 * Return either BMSR_LSTATUS, meaning that the link is up (or we
606 * can't tell and just pretend it is), or 0, meaning that the link is
609 * If reporting is non-zero, instead of faking link up, return -1 if
610 * both ETHTOOL and MII ioctls fail (meaning the device does not
611 * support them). If use_carrier is set, return whatever it says.
612 * It'd be nice if there was a good way to tell if a driver supports
613 * netif_carrier, but there really isn't.
615 static int bond_check_dev_link(struct bonding
*bond
,
616 struct net_device
*slave_dev
, int reporting
)
618 const struct net_device_ops
*slave_ops
= slave_dev
->netdev_ops
;
619 int (*ioctl
)(struct net_device
*, struct ifreq
*, int);
621 struct mii_ioctl_data
*mii
;
623 if (!reporting
&& !netif_running(slave_dev
))
626 if (bond
->params
.use_carrier
)
627 return netif_carrier_ok(slave_dev
) ? BMSR_LSTATUS
: 0;
629 /* Try to get link status using Ethtool first. */
630 if (slave_dev
->ethtool_ops
->get_link
)
631 return slave_dev
->ethtool_ops
->get_link(slave_dev
) ?
634 /* Ethtool can't be used, fallback to MII ioctls. */
635 ioctl
= slave_ops
->ndo_do_ioctl
;
637 /* TODO: set pointer to correct ioctl on a per team member */
638 /* bases to make this more efficient. that is, once */
639 /* we determine the correct ioctl, we will always */
640 /* call it and not the others for that team */
644 * We cannot assume that SIOCGMIIPHY will also read a
645 * register; not all network drivers (e.g., e100)
649 /* Yes, the mii is overlaid on the ifreq.ifr_ifru */
650 strncpy(ifr
.ifr_name
, slave_dev
->name
, IFNAMSIZ
);
652 if (IOCTL(slave_dev
, &ifr
, SIOCGMIIPHY
) == 0) {
653 mii
->reg_num
= MII_BMSR
;
654 if (IOCTL(slave_dev
, &ifr
, SIOCGMIIREG
) == 0)
655 return mii
->val_out
& BMSR_LSTATUS
;
660 * If reporting, report that either there's no dev->do_ioctl,
661 * or both SIOCGMIIREG and get_link failed (meaning that we
662 * cannot report link status). If not reporting, pretend
665 return reporting
? -1 : BMSR_LSTATUS
;
668 /*----------------------------- Multicast list ------------------------------*/
671 * Push the promiscuity flag down to appropriate slaves
673 static int bond_set_promiscuity(struct bonding
*bond
, int inc
)
676 if (USES_PRIMARY(bond
->params
.mode
)) {
677 /* write lock already acquired */
678 if (bond
->curr_active_slave
) {
679 err
= dev_set_promiscuity(bond
->curr_active_slave
->dev
,
685 bond_for_each_slave(bond
, slave
, i
) {
686 err
= dev_set_promiscuity(slave
->dev
, inc
);
695 * Push the allmulti flag down to all slaves
697 static int bond_set_allmulti(struct bonding
*bond
, int inc
)
700 if (USES_PRIMARY(bond
->params
.mode
)) {
701 /* write lock already acquired */
702 if (bond
->curr_active_slave
) {
703 err
= dev_set_allmulti(bond
->curr_active_slave
->dev
,
709 bond_for_each_slave(bond
, slave
, i
) {
710 err
= dev_set_allmulti(slave
->dev
, inc
);
718 static void __bond_resend_igmp_join_requests(struct net_device
*dev
)
720 struct in_device
*in_dev
;
722 in_dev
= __in_dev_get_rcu(dev
);
724 ip_mc_rejoin_groups(in_dev
);
728 * Retrieve the list of registered multicast addresses for the bonding
729 * device and retransmit an IGMP JOIN request to the current active
732 static void bond_resend_igmp_join_requests(struct bonding
*bond
)
734 struct net_device
*bond_dev
, *vlan_dev
, *upper_dev
;
735 struct vlan_entry
*vlan
;
737 read_lock(&bond
->lock
);
740 bond_dev
= bond
->dev
;
742 /* rejoin all groups on bond device */
743 __bond_resend_igmp_join_requests(bond_dev
);
746 * if bond is enslaved to a bridge,
747 * then rejoin all groups on its master
749 upper_dev
= netdev_master_upper_dev_get_rcu(bond_dev
);
750 if (upper_dev
&& upper_dev
->priv_flags
& IFF_EBRIDGE
)
751 __bond_resend_igmp_join_requests(upper_dev
);
753 /* rejoin all groups on vlan devices */
754 list_for_each_entry(vlan
, &bond
->vlan_list
, vlan_list
) {
755 vlan_dev
= __vlan_find_dev_deep(bond_dev
, htons(ETH_P_8021Q
),
758 __bond_resend_igmp_join_requests(vlan_dev
);
762 /* We use curr_slave_lock to protect against concurrent access to
763 * igmp_retrans from multiple running instances of this function and
764 * bond_change_active_slave
766 write_lock_bh(&bond
->curr_slave_lock
);
767 if (bond
->igmp_retrans
> 1) {
768 bond
->igmp_retrans
--;
769 queue_delayed_work(bond
->wq
, &bond
->mcast_work
, HZ
/5);
771 write_unlock_bh(&bond
->curr_slave_lock
);
772 read_unlock(&bond
->lock
);
775 static void bond_resend_igmp_join_requests_delayed(struct work_struct
*work
)
777 struct bonding
*bond
= container_of(work
, struct bonding
,
780 bond_resend_igmp_join_requests(bond
);
783 /* Flush bond's hardware addresses from slave
785 static void bond_hw_addr_flush(struct net_device
*bond_dev
,
786 struct net_device
*slave_dev
)
788 struct bonding
*bond
= netdev_priv(bond_dev
);
790 dev_uc_unsync(slave_dev
, bond_dev
);
791 dev_mc_unsync(slave_dev
, bond_dev
);
793 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
794 /* del lacpdu mc addr from mc list */
795 u8 lacpdu_multicast
[ETH_ALEN
] = MULTICAST_LACPDU_ADDR
;
797 dev_mc_del(slave_dev
, lacpdu_multicast
);
801 /*--------------------------- Active slave change ---------------------------*/
803 /* Update the hardware address list and promisc/allmulti for the new and
804 * old active slaves (if any). Modes that are !USES_PRIMARY keep all
805 * slaves up date at all times; only the USES_PRIMARY modes need to call
806 * this function to swap these settings during a failover.
808 static void bond_hw_addr_swap(struct bonding
*bond
, struct slave
*new_active
,
809 struct slave
*old_active
)
812 if (bond
->dev
->flags
& IFF_PROMISC
)
813 dev_set_promiscuity(old_active
->dev
, -1);
815 if (bond
->dev
->flags
& IFF_ALLMULTI
)
816 dev_set_allmulti(old_active
->dev
, -1);
818 bond_hw_addr_flush(bond
->dev
, old_active
->dev
);
822 /* FIXME: Signal errors upstream. */
823 if (bond
->dev
->flags
& IFF_PROMISC
)
824 dev_set_promiscuity(new_active
->dev
, 1);
826 if (bond
->dev
->flags
& IFF_ALLMULTI
)
827 dev_set_allmulti(new_active
->dev
, 1);
829 netif_addr_lock_bh(bond
->dev
);
830 dev_uc_sync(new_active
->dev
, bond
->dev
);
831 dev_mc_sync(new_active
->dev
, bond
->dev
);
832 netif_addr_unlock_bh(bond
->dev
);
837 * bond_set_dev_addr - clone slave's address to bond
838 * @bond_dev: bond net device
839 * @slave_dev: slave net device
841 * Should be called with RTNL held.
843 static void bond_set_dev_addr(struct net_device
*bond_dev
,
844 struct net_device
*slave_dev
)
846 pr_debug("bond_dev=%p slave_dev=%p slave_dev->addr_len=%d\n",
847 bond_dev
, slave_dev
, slave_dev
->addr_len
);
848 memcpy(bond_dev
->dev_addr
, slave_dev
->dev_addr
, slave_dev
->addr_len
);
849 bond_dev
->addr_assign_type
= NET_ADDR_STOLEN
;
850 call_netdevice_notifiers(NETDEV_CHANGEADDR
, bond_dev
);
854 * bond_do_fail_over_mac
856 * Perform special MAC address swapping for fail_over_mac settings
858 * Called with RTNL, bond->lock for read, curr_slave_lock for write_bh.
860 static void bond_do_fail_over_mac(struct bonding
*bond
,
861 struct slave
*new_active
,
862 struct slave
*old_active
)
863 __releases(&bond
->curr_slave_lock
)
864 __releases(&bond
->lock
)
865 __acquires(&bond
->lock
)
866 __acquires(&bond
->curr_slave_lock
)
868 u8 tmp_mac
[ETH_ALEN
];
869 struct sockaddr saddr
;
872 switch (bond
->params
.fail_over_mac
) {
873 case BOND_FOM_ACTIVE
:
875 write_unlock_bh(&bond
->curr_slave_lock
);
876 read_unlock(&bond
->lock
);
877 bond_set_dev_addr(bond
->dev
, new_active
->dev
);
878 read_lock(&bond
->lock
);
879 write_lock_bh(&bond
->curr_slave_lock
);
882 case BOND_FOM_FOLLOW
:
884 * if new_active && old_active, swap them
885 * if just old_active, do nothing (going to no active slave)
886 * if just new_active, set new_active to bond's MAC
891 write_unlock_bh(&bond
->curr_slave_lock
);
892 read_unlock(&bond
->lock
);
895 memcpy(tmp_mac
, new_active
->dev
->dev_addr
, ETH_ALEN
);
896 memcpy(saddr
.sa_data
, old_active
->dev
->dev_addr
,
898 saddr
.sa_family
= new_active
->dev
->type
;
900 memcpy(saddr
.sa_data
, bond
->dev
->dev_addr
, ETH_ALEN
);
901 saddr
.sa_family
= bond
->dev
->type
;
904 rv
= dev_set_mac_address(new_active
->dev
, &saddr
);
906 pr_err("%s: Error %d setting MAC of slave %s\n",
907 bond
->dev
->name
, -rv
, new_active
->dev
->name
);
914 memcpy(saddr
.sa_data
, tmp_mac
, ETH_ALEN
);
915 saddr
.sa_family
= old_active
->dev
->type
;
917 rv
= dev_set_mac_address(old_active
->dev
, &saddr
);
919 pr_err("%s: Error %d setting MAC of slave %s\n",
920 bond
->dev
->name
, -rv
, new_active
->dev
->name
);
922 read_lock(&bond
->lock
);
923 write_lock_bh(&bond
->curr_slave_lock
);
926 pr_err("%s: bond_do_fail_over_mac impossible: bad policy %d\n",
927 bond
->dev
->name
, bond
->params
.fail_over_mac
);
933 static bool bond_should_change_active(struct bonding
*bond
)
935 struct slave
*prim
= bond
->primary_slave
;
936 struct slave
*curr
= bond
->curr_active_slave
;
938 if (!prim
|| !curr
|| curr
->link
!= BOND_LINK_UP
)
940 if (bond
->force_primary
) {
941 bond
->force_primary
= false;
944 if (bond
->params
.primary_reselect
== BOND_PRI_RESELECT_BETTER
&&
945 (prim
->speed
< curr
->speed
||
946 (prim
->speed
== curr
->speed
&& prim
->duplex
<= curr
->duplex
)))
948 if (bond
->params
.primary_reselect
== BOND_PRI_RESELECT_FAILURE
)
954 * find_best_interface - select the best available slave to be the active one
955 * @bond: our bonding struct
957 * Warning: Caller must hold curr_slave_lock for writing.
959 static struct slave
*bond_find_best_slave(struct bonding
*bond
)
961 struct slave
*new_active
, *old_active
;
962 struct slave
*bestslave
= NULL
;
963 int mintime
= bond
->params
.updelay
;
966 new_active
= bond
->curr_active_slave
;
968 if (!new_active
) { /* there were no active slaves left */
969 if (bond
->slave_cnt
> 0) /* found one slave */
970 new_active
= bond
->first_slave
;
972 return NULL
; /* still no slave, return NULL */
975 if ((bond
->primary_slave
) &&
976 bond
->primary_slave
->link
== BOND_LINK_UP
&&
977 bond_should_change_active(bond
)) {
978 new_active
= bond
->primary_slave
;
981 /* remember where to stop iterating over the slaves */
982 old_active
= new_active
;
984 bond_for_each_slave_from(bond
, new_active
, i
, old_active
) {
985 if (new_active
->link
== BOND_LINK_UP
) {
987 } else if (new_active
->link
== BOND_LINK_BACK
&&
988 IS_UP(new_active
->dev
)) {
989 /* link up, but waiting for stabilization */
990 if (new_active
->delay
< mintime
) {
991 mintime
= new_active
->delay
;
992 bestslave
= new_active
;
1000 static bool bond_should_notify_peers(struct bonding
*bond
)
1002 struct slave
*slave
= bond
->curr_active_slave
;
1004 pr_debug("bond_should_notify_peers: bond %s slave %s\n",
1005 bond
->dev
->name
, slave
? slave
->dev
->name
: "NULL");
1007 if (!slave
|| !bond
->send_peer_notif
||
1008 test_bit(__LINK_STATE_LINKWATCH_PENDING
, &slave
->dev
->state
))
1011 bond
->send_peer_notif
--;
1016 * change_active_interface - change the active slave into the specified one
1017 * @bond: our bonding struct
1018 * @new: the new slave to make the active one
1020 * Set the new slave to the bond's settings and unset them on the old
1021 * curr_active_slave.
1022 * Setting include flags, mc-list, promiscuity, allmulti, etc.
1024 * If @new's link state is %BOND_LINK_BACK we'll set it to %BOND_LINK_UP,
1025 * because it is apparently the best available slave we have, even though its
1026 * updelay hasn't timed out yet.
1028 * If new_active is not NULL, caller must hold bond->lock for read and
1029 * curr_slave_lock for write_bh.
1031 void bond_change_active_slave(struct bonding
*bond
, struct slave
*new_active
)
1033 struct slave
*old_active
= bond
->curr_active_slave
;
1035 if (old_active
== new_active
)
1039 new_active
->jiffies
= jiffies
;
1041 if (new_active
->link
== BOND_LINK_BACK
) {
1042 if (USES_PRIMARY(bond
->params
.mode
)) {
1043 pr_info("%s: making interface %s the new active one %d ms earlier.\n",
1044 bond
->dev
->name
, new_active
->dev
->name
,
1045 (bond
->params
.updelay
- new_active
->delay
) * bond
->params
.miimon
);
1048 new_active
->delay
= 0;
1049 new_active
->link
= BOND_LINK_UP
;
1051 if (bond
->params
.mode
== BOND_MODE_8023AD
)
1052 bond_3ad_handle_link_change(new_active
, BOND_LINK_UP
);
1054 if (bond_is_lb(bond
))
1055 bond_alb_handle_link_change(bond
, new_active
, BOND_LINK_UP
);
1057 if (USES_PRIMARY(bond
->params
.mode
)) {
1058 pr_info("%s: making interface %s the new active one.\n",
1059 bond
->dev
->name
, new_active
->dev
->name
);
1064 if (USES_PRIMARY(bond
->params
.mode
))
1065 bond_hw_addr_swap(bond
, new_active
, old_active
);
1067 if (bond_is_lb(bond
)) {
1068 bond_alb_handle_active_change(bond
, new_active
);
1070 bond_set_slave_inactive_flags(old_active
);
1072 bond_set_slave_active_flags(new_active
);
1074 bond
->curr_active_slave
= new_active
;
1077 if (bond
->params
.mode
== BOND_MODE_ACTIVEBACKUP
) {
1079 bond_set_slave_inactive_flags(old_active
);
1082 bool should_notify_peers
= false;
1084 bond_set_slave_active_flags(new_active
);
1086 if (bond
->params
.fail_over_mac
)
1087 bond_do_fail_over_mac(bond
, new_active
,
1090 if (netif_running(bond
->dev
)) {
1091 bond
->send_peer_notif
=
1092 bond
->params
.num_peer_notif
;
1093 should_notify_peers
=
1094 bond_should_notify_peers(bond
);
1097 write_unlock_bh(&bond
->curr_slave_lock
);
1098 read_unlock(&bond
->lock
);
1100 call_netdevice_notifiers(NETDEV_BONDING_FAILOVER
, bond
->dev
);
1101 if (should_notify_peers
)
1102 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS
,
1105 read_lock(&bond
->lock
);
1106 write_lock_bh(&bond
->curr_slave_lock
);
1110 /* resend IGMP joins since active slave has changed or
1111 * all were sent on curr_active_slave.
1112 * resend only if bond is brought up with the affected
1113 * bonding modes and the retransmission is enabled */
1114 if (netif_running(bond
->dev
) && (bond
->params
.resend_igmp
> 0) &&
1115 ((USES_PRIMARY(bond
->params
.mode
) && new_active
) ||
1116 bond
->params
.mode
== BOND_MODE_ROUNDROBIN
)) {
1117 bond
->igmp_retrans
= bond
->params
.resend_igmp
;
1118 queue_delayed_work(bond
->wq
, &bond
->mcast_work
, 0);
1123 * bond_select_active_slave - select a new active slave, if needed
1124 * @bond: our bonding struct
1126 * This functions should be called when one of the following occurs:
1127 * - The old curr_active_slave has been released or lost its link.
1128 * - The primary_slave has got its link back.
1129 * - A slave has got its link back and there's no old curr_active_slave.
1131 * Caller must hold bond->lock for read and curr_slave_lock for write_bh.
1133 void bond_select_active_slave(struct bonding
*bond
)
1135 struct slave
*best_slave
;
1138 best_slave
= bond_find_best_slave(bond
);
1139 if (best_slave
!= bond
->curr_active_slave
) {
1140 bond_change_active_slave(bond
, best_slave
);
1141 rv
= bond_set_carrier(bond
);
1145 if (netif_carrier_ok(bond
->dev
)) {
1146 pr_info("%s: first active interface up!\n",
1149 pr_info("%s: now running without any active interface !\n",
1155 /*--------------------------- slave list handling ---------------------------*/
1158 * This function attaches the slave to the end of list.
1160 * bond->lock held for writing by caller.
1162 static void bond_attach_slave(struct bonding
*bond
, struct slave
*new_slave
)
1164 if (bond
->first_slave
== NULL
) { /* attaching the first slave */
1165 new_slave
->next
= new_slave
;
1166 new_slave
->prev
= new_slave
;
1167 bond
->first_slave
= new_slave
;
1169 new_slave
->next
= bond
->first_slave
;
1170 new_slave
->prev
= bond
->first_slave
->prev
;
1171 new_slave
->next
->prev
= new_slave
;
1172 new_slave
->prev
->next
= new_slave
;
1179 * This function detaches the slave from the list.
1180 * WARNING: no check is made to verify if the slave effectively
1181 * belongs to <bond>.
1182 * Nothing is freed on return, structures are just unchained.
1183 * If any slave pointer in bond was pointing to <slave>,
1184 * it should be changed by the calling function.
1186 * bond->lock held for writing by caller.
1188 static void bond_detach_slave(struct bonding
*bond
, struct slave
*slave
)
1191 slave
->next
->prev
= slave
->prev
;
1194 slave
->prev
->next
= slave
->next
;
1196 if (bond
->first_slave
== slave
) { /* slave is the first slave */
1197 if (bond
->slave_cnt
> 1) { /* there are more slave */
1198 bond
->first_slave
= slave
->next
;
1200 bond
->first_slave
= NULL
; /* slave was the last one */
1209 #ifdef CONFIG_NET_POLL_CONTROLLER
1210 static inline int slave_enable_netpoll(struct slave
*slave
)
1215 np
= kzalloc(sizeof(*np
), GFP_ATOMIC
);
1220 err
= __netpoll_setup(np
, slave
->dev
, GFP_ATOMIC
);
1229 static inline void slave_disable_netpoll(struct slave
*slave
)
1231 struct netpoll
*np
= slave
->np
;
1237 __netpoll_free_async(np
);
1239 static inline bool slave_dev_support_netpoll(struct net_device
*slave_dev
)
1241 if (slave_dev
->priv_flags
& IFF_DISABLE_NETPOLL
)
1243 if (!slave_dev
->netdev_ops
->ndo_poll_controller
)
1248 static void bond_poll_controller(struct net_device
*bond_dev
)
1252 static void __bond_netpoll_cleanup(struct bonding
*bond
)
1254 struct slave
*slave
;
1257 bond_for_each_slave(bond
, slave
, i
)
1258 if (IS_UP(slave
->dev
))
1259 slave_disable_netpoll(slave
);
1261 static void bond_netpoll_cleanup(struct net_device
*bond_dev
)
1263 struct bonding
*bond
= netdev_priv(bond_dev
);
1265 read_lock(&bond
->lock
);
1266 __bond_netpoll_cleanup(bond
);
1267 read_unlock(&bond
->lock
);
1270 static int bond_netpoll_setup(struct net_device
*dev
, struct netpoll_info
*ni
, gfp_t gfp
)
1272 struct bonding
*bond
= netdev_priv(dev
);
1273 struct slave
*slave
;
1276 read_lock(&bond
->lock
);
1277 bond_for_each_slave(bond
, slave
, i
) {
1278 err
= slave_enable_netpoll(slave
);
1280 __bond_netpoll_cleanup(bond
);
1284 read_unlock(&bond
->lock
);
1288 static struct netpoll_info
*bond_netpoll_info(struct bonding
*bond
)
1290 return bond
->dev
->npinfo
;
1294 static inline int slave_enable_netpoll(struct slave
*slave
)
1298 static inline void slave_disable_netpoll(struct slave
*slave
)
1301 static void bond_netpoll_cleanup(struct net_device
*bond_dev
)
1306 /*---------------------------------- IOCTL ----------------------------------*/
1308 static netdev_features_t
bond_fix_features(struct net_device
*dev
,
1309 netdev_features_t features
)
1311 struct slave
*slave
;
1312 struct bonding
*bond
= netdev_priv(dev
);
1313 netdev_features_t mask
;
1316 read_lock(&bond
->lock
);
1318 if (!bond
->first_slave
) {
1319 /* Disable adding VLANs to empty bond. But why? --mq */
1320 features
|= NETIF_F_VLAN_CHALLENGED
;
1325 features
&= ~NETIF_F_ONE_FOR_ALL
;
1326 features
|= NETIF_F_ALL_FOR_ALL
;
1328 bond_for_each_slave(bond
, slave
, i
) {
1329 features
= netdev_increment_features(features
,
1330 slave
->dev
->features
,
1333 features
= netdev_add_tso_features(features
, mask
);
1336 read_unlock(&bond
->lock
);
1340 #define BOND_VLAN_FEATURES (NETIF_F_ALL_CSUM | NETIF_F_SG | \
1341 NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
1342 NETIF_F_HIGHDMA | NETIF_F_LRO)
1344 static void bond_compute_features(struct bonding
*bond
)
1346 struct slave
*slave
;
1347 struct net_device
*bond_dev
= bond
->dev
;
1348 netdev_features_t vlan_features
= BOND_VLAN_FEATURES
;
1349 unsigned short max_hard_header_len
= ETH_HLEN
;
1350 unsigned int gso_max_size
= GSO_MAX_SIZE
;
1351 u16 gso_max_segs
= GSO_MAX_SEGS
;
1353 unsigned int flags
, dst_release_flag
= IFF_XMIT_DST_RELEASE
;
1355 read_lock(&bond
->lock
);
1357 if (!bond
->first_slave
)
1360 bond_for_each_slave(bond
, slave
, i
) {
1361 vlan_features
= netdev_increment_features(vlan_features
,
1362 slave
->dev
->vlan_features
, BOND_VLAN_FEATURES
);
1364 dst_release_flag
&= slave
->dev
->priv_flags
;
1365 if (slave
->dev
->hard_header_len
> max_hard_header_len
)
1366 max_hard_header_len
= slave
->dev
->hard_header_len
;
1368 gso_max_size
= min(gso_max_size
, slave
->dev
->gso_max_size
);
1369 gso_max_segs
= min(gso_max_segs
, slave
->dev
->gso_max_segs
);
1373 bond_dev
->vlan_features
= vlan_features
;
1374 bond_dev
->hard_header_len
= max_hard_header_len
;
1375 bond_dev
->gso_max_segs
= gso_max_segs
;
1376 netif_set_gso_max_size(bond_dev
, gso_max_size
);
1378 flags
= bond_dev
->priv_flags
& ~IFF_XMIT_DST_RELEASE
;
1379 bond_dev
->priv_flags
= flags
| dst_release_flag
;
1381 read_unlock(&bond
->lock
);
1383 netdev_change_features(bond_dev
);
1386 static void bond_setup_by_slave(struct net_device
*bond_dev
,
1387 struct net_device
*slave_dev
)
1389 bond_dev
->header_ops
= slave_dev
->header_ops
;
1391 bond_dev
->type
= slave_dev
->type
;
1392 bond_dev
->hard_header_len
= slave_dev
->hard_header_len
;
1393 bond_dev
->addr_len
= slave_dev
->addr_len
;
1395 memcpy(bond_dev
->broadcast
, slave_dev
->broadcast
,
1396 slave_dev
->addr_len
);
1399 /* On bonding slaves other than the currently active slave, suppress
1400 * duplicates except for alb non-mcast/bcast.
1402 static bool bond_should_deliver_exact_match(struct sk_buff
*skb
,
1403 struct slave
*slave
,
1404 struct bonding
*bond
)
1406 if (bond_is_slave_inactive(slave
)) {
1407 if (bond
->params
.mode
== BOND_MODE_ALB
&&
1408 skb
->pkt_type
!= PACKET_BROADCAST
&&
1409 skb
->pkt_type
!= PACKET_MULTICAST
)
1416 static rx_handler_result_t
bond_handle_frame(struct sk_buff
**pskb
)
1418 struct sk_buff
*skb
= *pskb
;
1419 struct slave
*slave
;
1420 struct bonding
*bond
;
1421 int (*recv_probe
)(const struct sk_buff
*, struct bonding
*,
1423 int ret
= RX_HANDLER_ANOTHER
;
1425 skb
= skb_share_check(skb
, GFP_ATOMIC
);
1427 return RX_HANDLER_CONSUMED
;
1431 slave
= bond_slave_get_rcu(skb
->dev
);
1434 if (bond
->params
.arp_interval
)
1435 slave
->dev
->last_rx
= jiffies
;
1437 recv_probe
= ACCESS_ONCE(bond
->recv_probe
);
1439 ret
= recv_probe(skb
, bond
, slave
);
1440 if (ret
== RX_HANDLER_CONSUMED
) {
1446 if (bond_should_deliver_exact_match(skb
, slave
, bond
)) {
1447 return RX_HANDLER_EXACT
;
1450 skb
->dev
= bond
->dev
;
1452 if (bond
->params
.mode
== BOND_MODE_ALB
&&
1453 bond
->dev
->priv_flags
& IFF_BRIDGE_PORT
&&
1454 skb
->pkt_type
== PACKET_HOST
) {
1456 if (unlikely(skb_cow_head(skb
,
1457 skb
->data
- skb_mac_header(skb
)))) {
1459 return RX_HANDLER_CONSUMED
;
1461 memcpy(eth_hdr(skb
)->h_dest
, bond
->dev
->dev_addr
, ETH_ALEN
);
1467 static int bond_master_upper_dev_link(struct net_device
*bond_dev
,
1468 struct net_device
*slave_dev
)
1472 err
= netdev_master_upper_dev_link(slave_dev
, bond_dev
);
1475 slave_dev
->flags
|= IFF_SLAVE
;
1476 rtmsg_ifinfo(RTM_NEWLINK
, slave_dev
, IFF_SLAVE
);
1480 static void bond_upper_dev_unlink(struct net_device
*bond_dev
,
1481 struct net_device
*slave_dev
)
1483 netdev_upper_dev_unlink(slave_dev
, bond_dev
);
1484 slave_dev
->flags
&= ~IFF_SLAVE
;
1485 rtmsg_ifinfo(RTM_NEWLINK
, slave_dev
, IFF_SLAVE
);
1488 /* enslave device <slave> to bond device <master> */
1489 int bond_enslave(struct net_device
*bond_dev
, struct net_device
*slave_dev
)
1491 struct bonding
*bond
= netdev_priv(bond_dev
);
1492 const struct net_device_ops
*slave_ops
= slave_dev
->netdev_ops
;
1493 struct slave
*new_slave
= NULL
;
1494 struct sockaddr addr
;
1498 if (!bond
->params
.use_carrier
&&
1499 slave_dev
->ethtool_ops
->get_link
== NULL
&&
1500 slave_ops
->ndo_do_ioctl
== NULL
) {
1501 pr_warning("%s: Warning: no link monitoring support for %s\n",
1502 bond_dev
->name
, slave_dev
->name
);
1505 /* already enslaved */
1506 if (slave_dev
->flags
& IFF_SLAVE
) {
1507 pr_debug("Error, Device was already enslaved\n");
1511 /* vlan challenged mutual exclusion */
1512 /* no need to lock since we're protected by rtnl_lock */
1513 if (slave_dev
->features
& NETIF_F_VLAN_CHALLENGED
) {
1514 pr_debug("%s: NETIF_F_VLAN_CHALLENGED\n", slave_dev
->name
);
1515 if (vlan_uses_dev(bond_dev
)) {
1516 pr_err("%s: Error: cannot enslave VLAN challenged slave %s on VLAN enabled bond %s\n",
1517 bond_dev
->name
, slave_dev
->name
, bond_dev
->name
);
1520 pr_warning("%s: Warning: enslaved VLAN challenged slave %s. Adding VLANs will be blocked as long as %s is part of bond %s\n",
1521 bond_dev
->name
, slave_dev
->name
,
1522 slave_dev
->name
, bond_dev
->name
);
1525 pr_debug("%s: ! NETIF_F_VLAN_CHALLENGED\n", slave_dev
->name
);
1529 * Old ifenslave binaries are no longer supported. These can
1530 * be identified with moderate accuracy by the state of the slave:
1531 * the current ifenslave will set the interface down prior to
1532 * enslaving it; the old ifenslave will not.
1534 if ((slave_dev
->flags
& IFF_UP
)) {
1535 pr_err("%s is up. This may be due to an out of date ifenslave.\n",
1538 goto err_undo_flags
;
1541 /* set bonding device ether type by slave - bonding netdevices are
1542 * created with ether_setup, so when the slave type is not ARPHRD_ETHER
1543 * there is a need to override some of the type dependent attribs/funcs.
1545 * bond ether type mutual exclusion - don't allow slaves of dissimilar
1546 * ether type (eg ARPHRD_ETHER and ARPHRD_INFINIBAND) share the same bond
1548 if (bond
->slave_cnt
== 0) {
1549 if (bond_dev
->type
!= slave_dev
->type
) {
1550 pr_debug("%s: change device type from %d to %d\n",
1552 bond_dev
->type
, slave_dev
->type
);
1554 res
= call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE
,
1556 res
= notifier_to_errno(res
);
1558 pr_err("%s: refused to change device type\n",
1561 goto err_undo_flags
;
1564 /* Flush unicast and multicast addresses */
1565 dev_uc_flush(bond_dev
);
1566 dev_mc_flush(bond_dev
);
1568 if (slave_dev
->type
!= ARPHRD_ETHER
)
1569 bond_setup_by_slave(bond_dev
, slave_dev
);
1571 ether_setup(bond_dev
);
1572 bond_dev
->priv_flags
&= ~IFF_TX_SKB_SHARING
;
1575 call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE
,
1578 } else if (bond_dev
->type
!= slave_dev
->type
) {
1579 pr_err("%s ether type (%d) is different from other slaves (%d), can not enslave it.\n",
1581 slave_dev
->type
, bond_dev
->type
);
1583 goto err_undo_flags
;
1586 if (slave_ops
->ndo_set_mac_address
== NULL
) {
1587 if (bond
->slave_cnt
== 0) {
1588 pr_warning("%s: Warning: The first slave device specified does not support setting the MAC address. Setting fail_over_mac to active.",
1590 bond
->params
.fail_over_mac
= BOND_FOM_ACTIVE
;
1591 } else if (bond
->params
.fail_over_mac
!= BOND_FOM_ACTIVE
) {
1592 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",
1595 goto err_undo_flags
;
1599 call_netdevice_notifiers(NETDEV_JOIN
, slave_dev
);
1601 /* If this is the first slave, then we need to set the master's hardware
1602 * address to be the same as the slave's. */
1603 if (!bond
->slave_cnt
&& bond
->dev
->addr_assign_type
== NET_ADDR_RANDOM
)
1604 bond_set_dev_addr(bond
->dev
, slave_dev
);
1606 new_slave
= kzalloc(sizeof(struct slave
), GFP_KERNEL
);
1609 goto err_undo_flags
;
1613 * Set the new_slave's queue_id to be zero. Queue ID mapping
1614 * is set via sysfs or module option if desired.
1616 new_slave
->queue_id
= 0;
1618 /* Save slave's original mtu and then set it to match the bond */
1619 new_slave
->original_mtu
= slave_dev
->mtu
;
1620 res
= dev_set_mtu(slave_dev
, bond
->dev
->mtu
);
1622 pr_debug("Error %d calling dev_set_mtu\n", res
);
1627 * Save slave's original ("permanent") mac address for modes
1628 * that need it, and for restoring it upon release, and then
1629 * set it to the master's address
1631 memcpy(new_slave
->perm_hwaddr
, slave_dev
->dev_addr
, ETH_ALEN
);
1633 if (!bond
->params
.fail_over_mac
) {
1635 * Set slave to master's mac address. The application already
1636 * set the master's mac address to that of the first slave
1638 memcpy(addr
.sa_data
, bond_dev
->dev_addr
, bond_dev
->addr_len
);
1639 addr
.sa_family
= slave_dev
->type
;
1640 res
= dev_set_mac_address(slave_dev
, &addr
);
1642 pr_debug("Error %d calling set_mac_address\n", res
);
1643 goto err_restore_mtu
;
1647 res
= bond_master_upper_dev_link(bond_dev
, slave_dev
);
1649 pr_debug("Error %d calling bond_master_upper_dev_link\n", res
);
1650 goto err_restore_mac
;
1653 /* open the slave since the application closed it */
1654 res
= dev_open(slave_dev
);
1656 pr_debug("Opening slave %s failed\n", slave_dev
->name
);
1657 goto err_unset_master
;
1660 new_slave
->bond
= bond
;
1661 new_slave
->dev
= slave_dev
;
1662 slave_dev
->priv_flags
|= IFF_BONDING
;
1664 if (bond_is_lb(bond
)) {
1665 /* bond_alb_init_slave() must be called before all other stages since
1666 * it might fail and we do not want to have to undo everything
1668 res
= bond_alb_init_slave(bond
, new_slave
);
1673 /* If the mode USES_PRIMARY, then the following is handled by
1674 * bond_change_active_slave().
1676 if (!USES_PRIMARY(bond
->params
.mode
)) {
1677 /* set promiscuity level to new slave */
1678 if (bond_dev
->flags
& IFF_PROMISC
) {
1679 res
= dev_set_promiscuity(slave_dev
, 1);
1684 /* set allmulti level to new slave */
1685 if (bond_dev
->flags
& IFF_ALLMULTI
) {
1686 res
= dev_set_allmulti(slave_dev
, 1);
1691 netif_addr_lock_bh(bond_dev
);
1693 dev_mc_sync_multiple(slave_dev
, bond_dev
);
1694 dev_uc_sync_multiple(slave_dev
, bond_dev
);
1696 netif_addr_unlock_bh(bond_dev
);
1699 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
1700 /* add lacpdu mc addr to mc list */
1701 u8 lacpdu_multicast
[ETH_ALEN
] = MULTICAST_LACPDU_ADDR
;
1703 dev_mc_add(slave_dev
, lacpdu_multicast
);
1706 bond_add_vlans_on_slave(bond
, slave_dev
);
1708 write_lock_bh(&bond
->lock
);
1710 bond_attach_slave(bond
, new_slave
);
1712 new_slave
->delay
= 0;
1713 new_slave
->link_failure_count
= 0;
1715 write_unlock_bh(&bond
->lock
);
1717 bond_compute_features(bond
);
1719 bond_update_speed_duplex(new_slave
);
1721 read_lock(&bond
->lock
);
1723 new_slave
->last_arp_rx
= jiffies
-
1724 (msecs_to_jiffies(bond
->params
.arp_interval
) + 1);
1725 for (i
= 0; i
< BOND_MAX_ARP_TARGETS
; i
++)
1726 new_slave
->target_last_arp_rx
[i
] = new_slave
->last_arp_rx
;
1728 if (bond
->params
.miimon
&& !bond
->params
.use_carrier
) {
1729 link_reporting
= bond_check_dev_link(bond
, slave_dev
, 1);
1731 if ((link_reporting
== -1) && !bond
->params
.arp_interval
) {
1733 * miimon is set but a bonded network driver
1734 * does not support ETHTOOL/MII and
1735 * arp_interval is not set. Note: if
1736 * use_carrier is enabled, we will never go
1737 * here (because netif_carrier is always
1738 * supported); thus, we don't need to change
1739 * the messages for netif_carrier.
1741 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",
1742 bond_dev
->name
, slave_dev
->name
);
1743 } else if (link_reporting
== -1) {
1744 /* unable get link status using mii/ethtool */
1745 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",
1746 bond_dev
->name
, slave_dev
->name
);
1750 /* check for initial state */
1751 if (bond
->params
.miimon
) {
1752 if (bond_check_dev_link(bond
, slave_dev
, 0) == BMSR_LSTATUS
) {
1753 if (bond
->params
.updelay
) {
1754 new_slave
->link
= BOND_LINK_BACK
;
1755 new_slave
->delay
= bond
->params
.updelay
;
1757 new_slave
->link
= BOND_LINK_UP
;
1760 new_slave
->link
= BOND_LINK_DOWN
;
1762 } else if (bond
->params
.arp_interval
) {
1763 new_slave
->link
= (netif_carrier_ok(slave_dev
) ?
1764 BOND_LINK_UP
: BOND_LINK_DOWN
);
1766 new_slave
->link
= BOND_LINK_UP
;
1769 if (new_slave
->link
!= BOND_LINK_DOWN
)
1770 new_slave
->jiffies
= jiffies
;
1771 pr_debug("Initial state of slave_dev is BOND_LINK_%s\n",
1772 new_slave
->link
== BOND_LINK_DOWN
? "DOWN" :
1773 (new_slave
->link
== BOND_LINK_UP
? "UP" : "BACK"));
1775 if (USES_PRIMARY(bond
->params
.mode
) && bond
->params
.primary
[0]) {
1776 /* if there is a primary slave, remember it */
1777 if (strcmp(bond
->params
.primary
, new_slave
->dev
->name
) == 0) {
1778 bond
->primary_slave
= new_slave
;
1779 bond
->force_primary
= true;
1783 write_lock_bh(&bond
->curr_slave_lock
);
1785 switch (bond
->params
.mode
) {
1786 case BOND_MODE_ACTIVEBACKUP
:
1787 bond_set_slave_inactive_flags(new_slave
);
1788 bond_select_active_slave(bond
);
1790 case BOND_MODE_8023AD
:
1791 /* in 802.3ad mode, the internal mechanism
1792 * will activate the slaves in the selected
1795 bond_set_slave_inactive_flags(new_slave
);
1796 /* if this is the first slave */
1797 if (bond
->slave_cnt
== 1) {
1798 SLAVE_AD_INFO(new_slave
).id
= 1;
1799 /* Initialize AD with the number of times that the AD timer is called in 1 second
1800 * can be called only after the mac address of the bond is set
1802 bond_3ad_initialize(bond
, 1000/AD_TIMER_INTERVAL
);
1804 SLAVE_AD_INFO(new_slave
).id
=
1805 SLAVE_AD_INFO(new_slave
->prev
).id
+ 1;
1808 bond_3ad_bind_slave(new_slave
);
1812 bond_set_active_slave(new_slave
);
1813 bond_set_slave_inactive_flags(new_slave
);
1814 bond_select_active_slave(bond
);
1817 pr_debug("This slave is always active in trunk mode\n");
1819 /* always active in trunk mode */
1820 bond_set_active_slave(new_slave
);
1822 /* In trunking mode there is little meaning to curr_active_slave
1823 * anyway (it holds no special properties of the bond device),
1824 * so we can change it without calling change_active_interface()
1826 if (!bond
->curr_active_slave
&& new_slave
->link
== BOND_LINK_UP
)
1827 bond
->curr_active_slave
= new_slave
;
1830 } /* switch(bond_mode) */
1832 write_unlock_bh(&bond
->curr_slave_lock
);
1834 bond_set_carrier(bond
);
1836 #ifdef CONFIG_NET_POLL_CONTROLLER
1837 slave_dev
->npinfo
= bond_netpoll_info(bond
);
1838 if (slave_dev
->npinfo
) {
1839 if (slave_enable_netpoll(new_slave
)) {
1840 read_unlock(&bond
->lock
);
1841 pr_info("Error, %s: master_dev is using netpoll, "
1842 "but new slave device does not support netpoll.\n",
1850 read_unlock(&bond
->lock
);
1852 res
= bond_create_slave_symlinks(bond_dev
, slave_dev
);
1856 res
= netdev_rx_handler_register(slave_dev
, bond_handle_frame
,
1859 pr_debug("Error %d calling netdev_rx_handler_register\n", res
);
1860 goto err_dest_symlinks
;
1863 pr_info("%s: enslaving %s as a%s interface with a%s link.\n",
1864 bond_dev
->name
, slave_dev
->name
,
1865 bond_is_active_slave(new_slave
) ? "n active" : " backup",
1866 new_slave
->link
!= BOND_LINK_DOWN
? "n up" : " down");
1868 /* enslave is successful */
1871 /* Undo stages on error */
1873 bond_destroy_slave_symlinks(bond_dev
, slave_dev
);
1876 if (!USES_PRIMARY(bond
->params
.mode
))
1877 bond_hw_addr_flush(bond_dev
, slave_dev
);
1879 bond_del_vlans_from_slave(bond
, slave_dev
);
1880 write_lock_bh(&bond
->lock
);
1881 bond_detach_slave(bond
, new_slave
);
1882 if (bond
->primary_slave
== new_slave
)
1883 bond
->primary_slave
= NULL
;
1884 if (bond
->curr_active_slave
== new_slave
) {
1885 bond_change_active_slave(bond
, NULL
);
1886 write_unlock_bh(&bond
->lock
);
1887 read_lock(&bond
->lock
);
1888 write_lock_bh(&bond
->curr_slave_lock
);
1889 bond_select_active_slave(bond
);
1890 write_unlock_bh(&bond
->curr_slave_lock
);
1891 read_unlock(&bond
->lock
);
1893 write_unlock_bh(&bond
->lock
);
1895 slave_disable_netpoll(new_slave
);
1898 slave_dev
->priv_flags
&= ~IFF_BONDING
;
1899 dev_close(slave_dev
);
1902 bond_upper_dev_unlink(bond_dev
, slave_dev
);
1905 if (!bond
->params
.fail_over_mac
) {
1906 /* XXX TODO - fom follow mode needs to change master's
1907 * MAC if this slave's MAC is in use by the bond, or at
1908 * least print a warning.
1910 memcpy(addr
.sa_data
, new_slave
->perm_hwaddr
, ETH_ALEN
);
1911 addr
.sa_family
= slave_dev
->type
;
1912 dev_set_mac_address(slave_dev
, &addr
);
1916 dev_set_mtu(slave_dev
, new_slave
->original_mtu
);
1922 bond_compute_features(bond
);
1923 /* Enslave of first slave has failed and we need to fix master's mac */
1924 if (bond
->slave_cnt
== 0 &&
1925 ether_addr_equal(bond_dev
->dev_addr
, slave_dev
->dev_addr
))
1926 eth_hw_addr_random(bond_dev
);
1932 * Try to release the slave device <slave> from the bond device <master>
1933 * It is legal to access curr_active_slave without a lock because all the function
1934 * is write-locked. If "all" is true it means that the function is being called
1935 * while destroying a bond interface and all slaves are being released.
1937 * The rules for slave state should be:
1938 * for Active/Backup:
1939 * Active stays on all backups go down
1940 * for Bonded connections:
1941 * The first up interface should be left on and all others downed.
1943 static int __bond_release_one(struct net_device
*bond_dev
,
1944 struct net_device
*slave_dev
,
1947 struct bonding
*bond
= netdev_priv(bond_dev
);
1948 struct slave
*slave
, *oldcurrent
;
1949 struct sockaddr addr
;
1950 netdev_features_t old_features
= bond_dev
->features
;
1952 /* slave is not a slave or master is not master of this slave */
1953 if (!(slave_dev
->flags
& IFF_SLAVE
) ||
1954 !netdev_has_upper_dev(slave_dev
, bond_dev
)) {
1955 pr_err("%s: Error: cannot release %s.\n",
1956 bond_dev
->name
, slave_dev
->name
);
1961 write_lock_bh(&bond
->lock
);
1963 slave
= bond_get_slave_by_dev(bond
, slave_dev
);
1965 /* not a slave of this bond */
1966 pr_info("%s: %s not enslaved\n",
1967 bond_dev
->name
, slave_dev
->name
);
1968 write_unlock_bh(&bond
->lock
);
1969 unblock_netpoll_tx();
1973 write_unlock_bh(&bond
->lock
);
1974 /* unregister rx_handler early so bond_handle_frame wouldn't be called
1975 * for this slave anymore.
1977 netdev_rx_handler_unregister(slave_dev
);
1978 write_lock_bh(&bond
->lock
);
1980 if (!all
&& !bond
->params
.fail_over_mac
) {
1981 if (ether_addr_equal(bond_dev
->dev_addr
, slave
->perm_hwaddr
) &&
1982 bond
->slave_cnt
> 1)
1983 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",
1984 bond_dev
->name
, slave_dev
->name
,
1986 bond_dev
->name
, slave_dev
->name
);
1989 /* Inform AD package of unbinding of slave. */
1990 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
1991 /* must be called before the slave is
1992 * detached from the list
1994 bond_3ad_unbind_slave(slave
);
1997 pr_info("%s: releasing %s interface %s\n",
1999 bond_is_active_slave(slave
) ? "active" : "backup",
2002 oldcurrent
= bond
->curr_active_slave
;
2004 bond
->current_arp_slave
= NULL
;
2006 /* release the slave from its bond */
2007 bond_detach_slave(bond
, slave
);
2009 if (bond
->primary_slave
== slave
)
2010 bond
->primary_slave
= NULL
;
2012 if (oldcurrent
== slave
)
2013 bond_change_active_slave(bond
, NULL
);
2015 if (bond_is_lb(bond
)) {
2016 /* Must be called only after the slave has been
2017 * detached from the list and the curr_active_slave
2018 * has been cleared (if our_slave == old_current),
2019 * but before a new active slave is selected.
2021 write_unlock_bh(&bond
->lock
);
2022 bond_alb_deinit_slave(bond
, slave
);
2023 write_lock_bh(&bond
->lock
);
2027 bond
->curr_active_slave
= NULL
;
2028 } else if (oldcurrent
== slave
) {
2030 * Note that we hold RTNL over this sequence, so there
2031 * is no concern that another slave add/remove event
2034 write_unlock_bh(&bond
->lock
);
2035 read_lock(&bond
->lock
);
2036 write_lock_bh(&bond
->curr_slave_lock
);
2038 bond_select_active_slave(bond
);
2040 write_unlock_bh(&bond
->curr_slave_lock
);
2041 read_unlock(&bond
->lock
);
2042 write_lock_bh(&bond
->lock
);
2045 if (bond
->slave_cnt
== 0) {
2046 bond_set_carrier(bond
);
2047 eth_hw_addr_random(bond_dev
);
2049 if (bond_vlan_used(bond
)) {
2050 pr_warning("%s: Warning: clearing HW address of %s while it still has VLANs.\n",
2051 bond_dev
->name
, bond_dev
->name
);
2052 pr_warning("%s: When re-adding slaves, make sure the bond's HW address matches its VLANs'.\n",
2057 write_unlock_bh(&bond
->lock
);
2058 unblock_netpoll_tx();
2060 if (bond
->slave_cnt
== 0) {
2061 call_netdevice_notifiers(NETDEV_CHANGEADDR
, bond
->dev
);
2062 call_netdevice_notifiers(NETDEV_RELEASE
, bond
->dev
);
2065 bond_compute_features(bond
);
2066 if (!(bond_dev
->features
& NETIF_F_VLAN_CHALLENGED
) &&
2067 (old_features
& NETIF_F_VLAN_CHALLENGED
))
2068 pr_info("%s: last VLAN challenged slave %s left bond %s. VLAN blocking is removed\n",
2069 bond_dev
->name
, slave_dev
->name
, bond_dev
->name
);
2071 /* must do this from outside any spinlocks */
2072 bond_destroy_slave_symlinks(bond_dev
, slave_dev
);
2074 bond_del_vlans_from_slave(bond
, slave_dev
);
2076 /* If the mode USES_PRIMARY, then this cases was handled above by
2077 * bond_change_active_slave(..., NULL)
2079 if (!USES_PRIMARY(bond
->params
.mode
)) {
2080 /* unset promiscuity level from slave */
2081 if (bond_dev
->flags
& IFF_PROMISC
)
2082 dev_set_promiscuity(slave_dev
, -1);
2084 /* unset allmulti level from slave */
2085 if (bond_dev
->flags
& IFF_ALLMULTI
)
2086 dev_set_allmulti(slave_dev
, -1);
2088 bond_hw_addr_flush(bond_dev
, slave_dev
);
2091 bond_upper_dev_unlink(bond_dev
, slave_dev
);
2093 slave_disable_netpoll(slave
);
2095 /* close slave before restoring its mac address */
2096 dev_close(slave_dev
);
2098 if (bond
->params
.fail_over_mac
!= BOND_FOM_ACTIVE
) {
2099 /* restore original ("permanent") mac address */
2100 memcpy(addr
.sa_data
, slave
->perm_hwaddr
, ETH_ALEN
);
2101 addr
.sa_family
= slave_dev
->type
;
2102 dev_set_mac_address(slave_dev
, &addr
);
2105 dev_set_mtu(slave_dev
, slave
->original_mtu
);
2107 slave_dev
->priv_flags
&= ~IFF_BONDING
;
2111 return 0; /* deletion OK */
2114 /* A wrapper used because of ndo_del_link */
2115 int bond_release(struct net_device
*bond_dev
, struct net_device
*slave_dev
)
2117 return __bond_release_one(bond_dev
, slave_dev
, false);
2121 * First release a slave and then destroy the bond if no more slaves are left.
2122 * Must be under rtnl_lock when this function is called.
2124 static int bond_release_and_destroy(struct net_device
*bond_dev
,
2125 struct net_device
*slave_dev
)
2127 struct bonding
*bond
= netdev_priv(bond_dev
);
2130 ret
= bond_release(bond_dev
, slave_dev
);
2131 if ((ret
== 0) && (bond
->slave_cnt
== 0)) {
2132 bond_dev
->priv_flags
|= IFF_DISABLE_NETPOLL
;
2133 pr_info("%s: destroying bond %s.\n",
2134 bond_dev
->name
, bond_dev
->name
);
2135 unregister_netdevice(bond_dev
);
2141 * This function changes the active slave to slave <slave_dev>.
2142 * It returns -EINVAL in the following cases.
2143 * - <slave_dev> is not found in the list.
2144 * - There is not active slave now.
2145 * - <slave_dev> is already active.
2146 * - The link state of <slave_dev> is not BOND_LINK_UP.
2147 * - <slave_dev> is not running.
2148 * In these cases, this function does nothing.
2149 * In the other cases, current_slave pointer is changed and 0 is returned.
2151 static int bond_ioctl_change_active(struct net_device
*bond_dev
, struct net_device
*slave_dev
)
2153 struct bonding
*bond
= netdev_priv(bond_dev
);
2154 struct slave
*old_active
= NULL
;
2155 struct slave
*new_active
= NULL
;
2158 if (!USES_PRIMARY(bond
->params
.mode
))
2161 /* Verify that bond_dev is indeed the master of slave_dev */
2162 if (!(slave_dev
->flags
& IFF_SLAVE
) ||
2163 !netdev_has_upper_dev(slave_dev
, bond_dev
))
2166 read_lock(&bond
->lock
);
2168 read_lock(&bond
->curr_slave_lock
);
2169 old_active
= bond
->curr_active_slave
;
2170 read_unlock(&bond
->curr_slave_lock
);
2172 new_active
= bond_get_slave_by_dev(bond
, slave_dev
);
2175 * Changing to the current active: do nothing; return success.
2177 if (new_active
&& (new_active
== old_active
)) {
2178 read_unlock(&bond
->lock
);
2184 (new_active
->link
== BOND_LINK_UP
) &&
2185 IS_UP(new_active
->dev
)) {
2187 write_lock_bh(&bond
->curr_slave_lock
);
2188 bond_change_active_slave(bond
, new_active
);
2189 write_unlock_bh(&bond
->curr_slave_lock
);
2190 unblock_netpoll_tx();
2194 read_unlock(&bond
->lock
);
2199 static int bond_info_query(struct net_device
*bond_dev
, struct ifbond
*info
)
2201 struct bonding
*bond
= netdev_priv(bond_dev
);
2203 info
->bond_mode
= bond
->params
.mode
;
2204 info
->miimon
= bond
->params
.miimon
;
2206 read_lock(&bond
->lock
);
2207 info
->num_slaves
= bond
->slave_cnt
;
2208 read_unlock(&bond
->lock
);
2213 static int bond_slave_info_query(struct net_device
*bond_dev
, struct ifslave
*info
)
2215 struct bonding
*bond
= netdev_priv(bond_dev
);
2216 struct slave
*slave
;
2217 int i
, res
= -ENODEV
;
2219 read_lock(&bond
->lock
);
2221 bond_for_each_slave(bond
, slave
, i
) {
2222 if (i
== (int)info
->slave_id
) {
2224 strcpy(info
->slave_name
, slave
->dev
->name
);
2225 info
->link
= slave
->link
;
2226 info
->state
= bond_slave_state(slave
);
2227 info
->link_failure_count
= slave
->link_failure_count
;
2232 read_unlock(&bond
->lock
);
2237 /*-------------------------------- Monitoring -------------------------------*/
2240 static int bond_miimon_inspect(struct bonding
*bond
)
2242 struct slave
*slave
;
2243 int i
, link_state
, commit
= 0;
2244 bool ignore_updelay
;
2246 ignore_updelay
= !bond
->curr_active_slave
? true : false;
2248 bond_for_each_slave(bond
, slave
, i
) {
2249 slave
->new_link
= BOND_LINK_NOCHANGE
;
2251 link_state
= bond_check_dev_link(bond
, slave
->dev
, 0);
2253 switch (slave
->link
) {
2258 slave
->link
= BOND_LINK_FAIL
;
2259 slave
->delay
= bond
->params
.downdelay
;
2261 pr_info("%s: link status down for %sinterface %s, disabling it in %d ms.\n",
2263 (bond
->params
.mode
==
2264 BOND_MODE_ACTIVEBACKUP
) ?
2265 (bond_is_active_slave(slave
) ?
2266 "active " : "backup ") : "",
2268 bond
->params
.downdelay
* bond
->params
.miimon
);
2271 case BOND_LINK_FAIL
:
2274 * recovered before downdelay expired
2276 slave
->link
= BOND_LINK_UP
;
2277 slave
->jiffies
= jiffies
;
2278 pr_info("%s: link status up again after %d ms for interface %s.\n",
2280 (bond
->params
.downdelay
- slave
->delay
) *
2281 bond
->params
.miimon
,
2286 if (slave
->delay
<= 0) {
2287 slave
->new_link
= BOND_LINK_DOWN
;
2295 case BOND_LINK_DOWN
:
2299 slave
->link
= BOND_LINK_BACK
;
2300 slave
->delay
= bond
->params
.updelay
;
2303 pr_info("%s: link status up for interface %s, enabling it in %d ms.\n",
2304 bond
->dev
->name
, slave
->dev
->name
,
2305 ignore_updelay
? 0 :
2306 bond
->params
.updelay
*
2307 bond
->params
.miimon
);
2310 case BOND_LINK_BACK
:
2312 slave
->link
= BOND_LINK_DOWN
;
2313 pr_info("%s: link status down again after %d ms for interface %s.\n",
2315 (bond
->params
.updelay
- slave
->delay
) *
2316 bond
->params
.miimon
,
2325 if (slave
->delay
<= 0) {
2326 slave
->new_link
= BOND_LINK_UP
;
2328 ignore_updelay
= false;
2340 static void bond_miimon_commit(struct bonding
*bond
)
2342 struct slave
*slave
;
2345 bond_for_each_slave(bond
, slave
, i
) {
2346 switch (slave
->new_link
) {
2347 case BOND_LINK_NOCHANGE
:
2351 slave
->link
= BOND_LINK_UP
;
2352 slave
->jiffies
= jiffies
;
2354 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
2355 /* prevent it from being the active one */
2356 bond_set_backup_slave(slave
);
2357 } else if (bond
->params
.mode
!= BOND_MODE_ACTIVEBACKUP
) {
2358 /* make it immediately active */
2359 bond_set_active_slave(slave
);
2360 } else if (slave
!= bond
->primary_slave
) {
2361 /* prevent it from being the active one */
2362 bond_set_backup_slave(slave
);
2365 pr_info("%s: link status definitely up for interface %s, %u Mbps %s duplex.\n",
2366 bond
->dev
->name
, slave
->dev
->name
,
2367 slave
->speed
== SPEED_UNKNOWN
? 0 : slave
->speed
,
2368 slave
->duplex
? "full" : "half");
2370 /* notify ad that the link status has changed */
2371 if (bond
->params
.mode
== BOND_MODE_8023AD
)
2372 bond_3ad_handle_link_change(slave
, BOND_LINK_UP
);
2374 if (bond_is_lb(bond
))
2375 bond_alb_handle_link_change(bond
, slave
,
2378 if (!bond
->curr_active_slave
||
2379 (slave
== bond
->primary_slave
))
2384 case BOND_LINK_DOWN
:
2385 if (slave
->link_failure_count
< UINT_MAX
)
2386 slave
->link_failure_count
++;
2388 slave
->link
= BOND_LINK_DOWN
;
2390 if (bond
->params
.mode
== BOND_MODE_ACTIVEBACKUP
||
2391 bond
->params
.mode
== BOND_MODE_8023AD
)
2392 bond_set_slave_inactive_flags(slave
);
2394 pr_info("%s: link status definitely down for interface %s, disabling it\n",
2395 bond
->dev
->name
, slave
->dev
->name
);
2397 if (bond
->params
.mode
== BOND_MODE_8023AD
)
2398 bond_3ad_handle_link_change(slave
,
2401 if (bond_is_lb(bond
))
2402 bond_alb_handle_link_change(bond
, slave
,
2405 if (slave
== bond
->curr_active_slave
)
2411 pr_err("%s: invalid new link %d on slave %s\n",
2412 bond
->dev
->name
, slave
->new_link
,
2414 slave
->new_link
= BOND_LINK_NOCHANGE
;
2422 write_lock_bh(&bond
->curr_slave_lock
);
2423 bond_select_active_slave(bond
);
2424 write_unlock_bh(&bond
->curr_slave_lock
);
2425 unblock_netpoll_tx();
2428 bond_set_carrier(bond
);
2434 * Really a wrapper that splits the mii monitor into two phases: an
2435 * inspection, then (if inspection indicates something needs to be done)
2436 * an acquisition of appropriate locks followed by a commit phase to
2437 * implement whatever link state changes are indicated.
2439 void bond_mii_monitor(struct work_struct
*work
)
2441 struct bonding
*bond
= container_of(work
, struct bonding
,
2443 bool should_notify_peers
= false;
2444 unsigned long delay
;
2446 read_lock(&bond
->lock
);
2448 delay
= msecs_to_jiffies(bond
->params
.miimon
);
2450 if (bond
->slave_cnt
== 0)
2453 should_notify_peers
= bond_should_notify_peers(bond
);
2455 if (bond_miimon_inspect(bond
)) {
2456 read_unlock(&bond
->lock
);
2458 /* Race avoidance with bond_close cancel of workqueue */
2459 if (!rtnl_trylock()) {
2460 read_lock(&bond
->lock
);
2462 should_notify_peers
= false;
2466 read_lock(&bond
->lock
);
2468 bond_miimon_commit(bond
);
2470 read_unlock(&bond
->lock
);
2471 rtnl_unlock(); /* might sleep, hold no other locks */
2472 read_lock(&bond
->lock
);
2476 if (bond
->params
.miimon
)
2477 queue_delayed_work(bond
->wq
, &bond
->mii_work
, delay
);
2479 read_unlock(&bond
->lock
);
2481 if (should_notify_peers
) {
2482 if (!rtnl_trylock()) {
2483 read_lock(&bond
->lock
);
2484 bond
->send_peer_notif
++;
2485 read_unlock(&bond
->lock
);
2488 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS
, bond
->dev
);
2493 static int bond_has_this_ip(struct bonding
*bond
, __be32 ip
)
2495 struct vlan_entry
*vlan
;
2496 struct net_device
*vlan_dev
;
2498 if (ip
== bond_confirm_addr(bond
->dev
, 0, ip
))
2501 list_for_each_entry(vlan
, &bond
->vlan_list
, vlan_list
) {
2503 vlan_dev
= __vlan_find_dev_deep(bond
->dev
, htons(ETH_P_8021Q
),
2506 if (vlan_dev
&& ip
== bond_confirm_addr(vlan_dev
, 0, ip
))
2514 * We go to the (large) trouble of VLAN tagging ARP frames because
2515 * switches in VLAN mode (especially if ports are configured as
2516 * "native" to a VLAN) might not pass non-tagged frames.
2518 static void bond_arp_send(struct net_device
*slave_dev
, int arp_op
, __be32 dest_ip
, __be32 src_ip
, unsigned short vlan_id
)
2520 struct sk_buff
*skb
;
2522 pr_debug("arp %d on slave %s: dst %pI4 src %pI4 vid %d\n", arp_op
,
2523 slave_dev
->name
, &dest_ip
, &src_ip
, vlan_id
);
2525 skb
= arp_create(arp_op
, ETH_P_ARP
, dest_ip
, slave_dev
, src_ip
,
2526 NULL
, slave_dev
->dev_addr
, NULL
);
2529 pr_err("ARP packet allocation failed\n");
2533 skb
= vlan_put_tag(skb
, htons(ETH_P_8021Q
), vlan_id
);
2535 pr_err("failed to insert VLAN tag\n");
2543 static void bond_arp_send_all(struct bonding
*bond
, struct slave
*slave
)
2546 __be32
*targets
= bond
->params
.arp_targets
;
2547 struct vlan_entry
*vlan
;
2548 struct net_device
*vlan_dev
= NULL
;
2551 for (i
= 0; (i
< BOND_MAX_ARP_TARGETS
); i
++) {
2555 pr_debug("basa: target %pI4\n", &targets
[i
]);
2556 if (!bond_vlan_used(bond
)) {
2557 pr_debug("basa: empty vlan: arp_send\n");
2558 addr
= bond_confirm_addr(bond
->dev
, targets
[i
], 0);
2559 bond_arp_send(slave
->dev
, ARPOP_REQUEST
, targets
[i
],
2565 * If VLANs are configured, we do a route lookup to
2566 * determine which VLAN interface would be used, so we
2567 * can tag the ARP with the proper VLAN tag.
2569 rt
= ip_route_output(dev_net(bond
->dev
), targets
[i
], 0,
2572 if (net_ratelimit()) {
2573 pr_warning("%s: no route to arp_ip_target %pI4\n",
2574 bond
->dev
->name
, &targets
[i
]);
2580 * This target is not on a VLAN
2582 if (rt
->dst
.dev
== bond
->dev
) {
2584 pr_debug("basa: rtdev == bond->dev: arp_send\n");
2585 addr
= bond_confirm_addr(bond
->dev
, targets
[i
], 0);
2586 bond_arp_send(slave
->dev
, ARPOP_REQUEST
, targets
[i
],
2592 list_for_each_entry(vlan
, &bond
->vlan_list
, vlan_list
) {
2594 vlan_dev
= __vlan_find_dev_deep(bond
->dev
,
2598 if (vlan_dev
== rt
->dst
.dev
) {
2599 vlan_id
= vlan
->vlan_id
;
2600 pr_debug("basa: vlan match on %s %d\n",
2601 vlan_dev
->name
, vlan_id
);
2606 if (vlan_id
&& vlan_dev
) {
2608 addr
= bond_confirm_addr(vlan_dev
, targets
[i
], 0);
2609 bond_arp_send(slave
->dev
, ARPOP_REQUEST
, targets
[i
],
2614 if (net_ratelimit()) {
2615 pr_warning("%s: no path to arp_ip_target %pI4 via rt.dev %s\n",
2616 bond
->dev
->name
, &targets
[i
],
2617 rt
->dst
.dev
? rt
->dst
.dev
->name
: "NULL");
2623 static void bond_validate_arp(struct bonding
*bond
, struct slave
*slave
, __be32 sip
, __be32 tip
)
2627 if (!sip
|| !bond_has_this_ip(bond
, tip
)) {
2628 pr_debug("bva: sip %pI4 tip %pI4 not found\n", &sip
, &tip
);
2632 i
= bond_get_targets_ip(bond
->params
.arp_targets
, sip
);
2634 pr_debug("bva: sip %pI4 not found in targets\n", &sip
);
2637 slave
->last_arp_rx
= jiffies
;
2638 slave
->target_last_arp_rx
[i
] = jiffies
;
2641 static int bond_arp_rcv(const struct sk_buff
*skb
, struct bonding
*bond
,
2642 struct slave
*slave
)
2644 struct arphdr
*arp
= (struct arphdr
*)skb
->data
;
2645 unsigned char *arp_ptr
;
2649 if (skb
->protocol
!= __cpu_to_be16(ETH_P_ARP
))
2650 return RX_HANDLER_ANOTHER
;
2652 read_lock(&bond
->lock
);
2654 if (!slave_do_arp_validate(bond
, slave
))
2657 alen
= arp_hdr_len(bond
->dev
);
2659 pr_debug("bond_arp_rcv: bond %s skb->dev %s\n",
2660 bond
->dev
->name
, skb
->dev
->name
);
2662 if (alen
> skb_headlen(skb
)) {
2663 arp
= kmalloc(alen
, GFP_ATOMIC
);
2666 if (skb_copy_bits(skb
, 0, arp
, alen
) < 0)
2670 if (arp
->ar_hln
!= bond
->dev
->addr_len
||
2671 skb
->pkt_type
== PACKET_OTHERHOST
||
2672 skb
->pkt_type
== PACKET_LOOPBACK
||
2673 arp
->ar_hrd
!= htons(ARPHRD_ETHER
) ||
2674 arp
->ar_pro
!= htons(ETH_P_IP
) ||
2678 arp_ptr
= (unsigned char *)(arp
+ 1);
2679 arp_ptr
+= bond
->dev
->addr_len
;
2680 memcpy(&sip
, arp_ptr
, 4);
2681 arp_ptr
+= 4 + bond
->dev
->addr_len
;
2682 memcpy(&tip
, arp_ptr
, 4);
2684 pr_debug("bond_arp_rcv: %s %s/%d av %d sv %d sip %pI4 tip %pI4\n",
2685 bond
->dev
->name
, slave
->dev
->name
, bond_slave_state(slave
),
2686 bond
->params
.arp_validate
, slave_do_arp_validate(bond
, slave
),
2690 * Backup slaves won't see the ARP reply, but do come through
2691 * here for each ARP probe (so we swap the sip/tip to validate
2692 * the probe). In a "redundant switch, common router" type of
2693 * configuration, the ARP probe will (hopefully) travel from
2694 * the active, through one switch, the router, then the other
2695 * switch before reaching the backup.
2697 * We 'trust' the arp requests if there is an active slave and
2698 * it received valid arp reply(s) after it became active. This
2699 * is done to avoid endless looping when we can't reach the
2700 * arp_ip_target and fool ourselves with our own arp requests.
2702 if (bond_is_active_slave(slave
))
2703 bond_validate_arp(bond
, slave
, sip
, tip
);
2704 else if (bond
->curr_active_slave
&&
2705 time_after(slave_last_rx(bond
, bond
->curr_active_slave
),
2706 bond
->curr_active_slave
->jiffies
))
2707 bond_validate_arp(bond
, slave
, tip
, sip
);
2710 read_unlock(&bond
->lock
);
2711 if (arp
!= (struct arphdr
*)skb
->data
)
2713 return RX_HANDLER_ANOTHER
;
2717 * this function is called regularly to monitor each slave's link
2718 * ensuring that traffic is being sent and received when arp monitoring
2719 * is used in load-balancing mode. if the adapter has been dormant, then an
2720 * arp is transmitted to generate traffic. see activebackup_arp_monitor for
2721 * arp monitoring in active backup mode.
2723 void bond_loadbalance_arp_mon(struct work_struct
*work
)
2725 struct bonding
*bond
= container_of(work
, struct bonding
,
2727 struct slave
*slave
, *oldcurrent
;
2728 int do_failover
= 0;
2729 int delta_in_ticks
, extra_ticks
;
2732 read_lock(&bond
->lock
);
2734 delta_in_ticks
= msecs_to_jiffies(bond
->params
.arp_interval
);
2735 extra_ticks
= delta_in_ticks
/ 2;
2737 if (bond
->slave_cnt
== 0)
2740 read_lock(&bond
->curr_slave_lock
);
2741 oldcurrent
= bond
->curr_active_slave
;
2742 read_unlock(&bond
->curr_slave_lock
);
2744 /* see if any of the previous devices are up now (i.e. they have
2745 * xmt and rcv traffic). the curr_active_slave does not come into
2746 * the picture unless it is null. also, slave->jiffies is not needed
2747 * here because we send an arp on each slave and give a slave as
2748 * long as it needs to get the tx/rx within the delta.
2749 * TODO: what about up/down delay in arp mode? it wasn't here before
2752 bond_for_each_slave(bond
, slave
, i
) {
2753 unsigned long trans_start
= dev_trans_start(slave
->dev
);
2755 if (slave
->link
!= BOND_LINK_UP
) {
2756 if (time_in_range(jiffies
,
2757 trans_start
- delta_in_ticks
,
2758 trans_start
+ delta_in_ticks
+ extra_ticks
) &&
2759 time_in_range(jiffies
,
2760 slave
->dev
->last_rx
- delta_in_ticks
,
2761 slave
->dev
->last_rx
+ delta_in_ticks
+ extra_ticks
)) {
2763 slave
->link
= BOND_LINK_UP
;
2764 bond_set_active_slave(slave
);
2766 /* primary_slave has no meaning in round-robin
2767 * mode. the window of a slave being up and
2768 * curr_active_slave being null after enslaving
2772 pr_info("%s: link status definitely up for interface %s, ",
2777 pr_info("%s: interface %s is now up\n",
2783 /* slave->link == BOND_LINK_UP */
2785 /* not all switches will respond to an arp request
2786 * when the source ip is 0, so don't take the link down
2787 * if we don't know our ip yet
2789 if (!time_in_range(jiffies
,
2790 trans_start
- delta_in_ticks
,
2791 trans_start
+ 2 * delta_in_ticks
+ extra_ticks
) ||
2792 !time_in_range(jiffies
,
2793 slave
->dev
->last_rx
- delta_in_ticks
,
2794 slave
->dev
->last_rx
+ 2 * delta_in_ticks
+ extra_ticks
)) {
2796 slave
->link
= BOND_LINK_DOWN
;
2797 bond_set_backup_slave(slave
);
2799 if (slave
->link_failure_count
< UINT_MAX
)
2800 slave
->link_failure_count
++;
2802 pr_info("%s: interface %s is now down.\n",
2806 if (slave
== oldcurrent
)
2811 /* note: if switch is in round-robin mode, all links
2812 * must tx arp to ensure all links rx an arp - otherwise
2813 * links may oscillate or not come up at all; if switch is
2814 * in something like xor mode, there is nothing we can
2815 * do - all replies will be rx'ed on same link causing slaves
2816 * to be unstable during low/no traffic periods
2818 if (IS_UP(slave
->dev
))
2819 bond_arp_send_all(bond
, slave
);
2824 write_lock_bh(&bond
->curr_slave_lock
);
2826 bond_select_active_slave(bond
);
2828 write_unlock_bh(&bond
->curr_slave_lock
);
2829 unblock_netpoll_tx();
2833 if (bond
->params
.arp_interval
)
2834 queue_delayed_work(bond
->wq
, &bond
->arp_work
, delta_in_ticks
);
2836 read_unlock(&bond
->lock
);
2840 * Called to inspect slaves for active-backup mode ARP monitor link state
2841 * changes. Sets new_link in slaves to specify what action should take
2842 * place for the slave. Returns 0 if no changes are found, >0 if changes
2843 * to link states must be committed.
2845 * Called with bond->lock held for read.
2847 static int bond_ab_arp_inspect(struct bonding
*bond
, int delta_in_ticks
)
2849 struct slave
*slave
;
2851 unsigned long trans_start
;
2854 /* All the time comparisons below need some extra time. Otherwise, on
2855 * fast networks the ARP probe/reply may arrive within the same jiffy
2856 * as it was sent. Then, the next time the ARP monitor is run, one
2857 * arp_interval will already have passed in the comparisons.
2859 extra_ticks
= delta_in_ticks
/ 2;
2861 bond_for_each_slave(bond
, slave
, i
) {
2862 slave
->new_link
= BOND_LINK_NOCHANGE
;
2864 if (slave
->link
!= BOND_LINK_UP
) {
2865 if (time_in_range(jiffies
,
2866 slave_last_rx(bond
, slave
) - delta_in_ticks
,
2867 slave_last_rx(bond
, slave
) + delta_in_ticks
+ extra_ticks
)) {
2869 slave
->new_link
= BOND_LINK_UP
;
2877 * Give slaves 2*delta after being enslaved or made
2878 * active. This avoids bouncing, as the last receive
2879 * times need a full ARP monitor cycle to be updated.
2881 if (time_in_range(jiffies
,
2882 slave
->jiffies
- delta_in_ticks
,
2883 slave
->jiffies
+ 2 * delta_in_ticks
+ extra_ticks
))
2887 * Backup slave is down if:
2888 * - No current_arp_slave AND
2889 * - more than 3*delta since last receive AND
2890 * - the bond has an IP address
2892 * Note: a non-null current_arp_slave indicates
2893 * the curr_active_slave went down and we are
2894 * searching for a new one; under this condition
2895 * we only take the curr_active_slave down - this
2896 * gives each slave a chance to tx/rx traffic
2897 * before being taken out
2899 if (!bond_is_active_slave(slave
) &&
2900 !bond
->current_arp_slave
&&
2901 !time_in_range(jiffies
,
2902 slave_last_rx(bond
, slave
) - delta_in_ticks
,
2903 slave_last_rx(bond
, slave
) + 3 * delta_in_ticks
+ extra_ticks
)) {
2905 slave
->new_link
= BOND_LINK_DOWN
;
2910 * Active slave is down if:
2911 * - more than 2*delta since transmitting OR
2912 * - (more than 2*delta since receive AND
2913 * the bond has an IP address)
2915 trans_start
= dev_trans_start(slave
->dev
);
2916 if (bond_is_active_slave(slave
) &&
2917 (!time_in_range(jiffies
,
2918 trans_start
- delta_in_ticks
,
2919 trans_start
+ 2 * delta_in_ticks
+ extra_ticks
) ||
2920 !time_in_range(jiffies
,
2921 slave_last_rx(bond
, slave
) - delta_in_ticks
,
2922 slave_last_rx(bond
, slave
) + 2 * delta_in_ticks
+ extra_ticks
))) {
2924 slave
->new_link
= BOND_LINK_DOWN
;
2933 * Called to commit link state changes noted by inspection step of
2934 * active-backup mode ARP monitor.
2936 * Called with RTNL and bond->lock for read.
2938 static void bond_ab_arp_commit(struct bonding
*bond
, int delta_in_ticks
)
2940 struct slave
*slave
;
2942 unsigned long trans_start
;
2944 bond_for_each_slave(bond
, slave
, i
) {
2945 switch (slave
->new_link
) {
2946 case BOND_LINK_NOCHANGE
:
2950 trans_start
= dev_trans_start(slave
->dev
);
2951 if ((!bond
->curr_active_slave
&&
2952 time_in_range(jiffies
,
2953 trans_start
- delta_in_ticks
,
2954 trans_start
+ delta_in_ticks
+ delta_in_ticks
/ 2)) ||
2955 bond
->curr_active_slave
!= slave
) {
2956 slave
->link
= BOND_LINK_UP
;
2957 if (bond
->current_arp_slave
) {
2958 bond_set_slave_inactive_flags(
2959 bond
->current_arp_slave
);
2960 bond
->current_arp_slave
= NULL
;
2963 pr_info("%s: link status definitely up for interface %s.\n",
2964 bond
->dev
->name
, slave
->dev
->name
);
2966 if (!bond
->curr_active_slave
||
2967 (slave
== bond
->primary_slave
))
2974 case BOND_LINK_DOWN
:
2975 if (slave
->link_failure_count
< UINT_MAX
)
2976 slave
->link_failure_count
++;
2978 slave
->link
= BOND_LINK_DOWN
;
2979 bond_set_slave_inactive_flags(slave
);
2981 pr_info("%s: link status definitely down for interface %s, disabling it\n",
2982 bond
->dev
->name
, slave
->dev
->name
);
2984 if (slave
== bond
->curr_active_slave
) {
2985 bond
->current_arp_slave
= NULL
;
2992 pr_err("%s: impossible: new_link %d on slave %s\n",
2993 bond
->dev
->name
, slave
->new_link
,
3001 write_lock_bh(&bond
->curr_slave_lock
);
3002 bond_select_active_slave(bond
);
3003 write_unlock_bh(&bond
->curr_slave_lock
);
3004 unblock_netpoll_tx();
3007 bond_set_carrier(bond
);
3011 * Send ARP probes for active-backup mode ARP monitor.
3013 * Called with bond->lock held for read.
3015 static void bond_ab_arp_probe(struct bonding
*bond
)
3017 struct slave
*slave
;
3020 read_lock(&bond
->curr_slave_lock
);
3022 if (bond
->current_arp_slave
&& bond
->curr_active_slave
)
3023 pr_info("PROBE: c_arp %s && cas %s BAD\n",
3024 bond
->current_arp_slave
->dev
->name
,
3025 bond
->curr_active_slave
->dev
->name
);
3027 if (bond
->curr_active_slave
) {
3028 bond_arp_send_all(bond
, bond
->curr_active_slave
);
3029 read_unlock(&bond
->curr_slave_lock
);
3033 read_unlock(&bond
->curr_slave_lock
);
3035 /* if we don't have a curr_active_slave, search for the next available
3036 * backup slave from the current_arp_slave and make it the candidate
3037 * for becoming the curr_active_slave
3040 if (!bond
->current_arp_slave
) {
3041 bond
->current_arp_slave
= bond
->first_slave
;
3042 if (!bond
->current_arp_slave
)
3046 bond_set_slave_inactive_flags(bond
->current_arp_slave
);
3048 /* search for next candidate */
3049 bond_for_each_slave_from(bond
, slave
, i
, bond
->current_arp_slave
->next
) {
3050 if (IS_UP(slave
->dev
)) {
3051 slave
->link
= BOND_LINK_BACK
;
3052 bond_set_slave_active_flags(slave
);
3053 bond_arp_send_all(bond
, slave
);
3054 slave
->jiffies
= jiffies
;
3055 bond
->current_arp_slave
= slave
;
3059 /* if the link state is up at this point, we
3060 * mark it down - this can happen if we have
3061 * simultaneous link failures and
3062 * reselect_active_interface doesn't make this
3063 * one the current slave so it is still marked
3064 * up when it is actually down
3066 if (slave
->link
== BOND_LINK_UP
) {
3067 slave
->link
= BOND_LINK_DOWN
;
3068 if (slave
->link_failure_count
< UINT_MAX
)
3069 slave
->link_failure_count
++;
3071 bond_set_slave_inactive_flags(slave
);
3073 pr_info("%s: backup interface %s is now down.\n",
3074 bond
->dev
->name
, slave
->dev
->name
);
3079 void bond_activebackup_arp_mon(struct work_struct
*work
)
3081 struct bonding
*bond
= container_of(work
, struct bonding
,
3083 bool should_notify_peers
= false;
3086 read_lock(&bond
->lock
);
3088 delta_in_ticks
= msecs_to_jiffies(bond
->params
.arp_interval
);
3090 if (bond
->slave_cnt
== 0)
3093 should_notify_peers
= bond_should_notify_peers(bond
);
3095 if (bond_ab_arp_inspect(bond
, delta_in_ticks
)) {
3096 read_unlock(&bond
->lock
);
3098 /* Race avoidance with bond_close flush of workqueue */
3099 if (!rtnl_trylock()) {
3100 read_lock(&bond
->lock
);
3102 should_notify_peers
= false;
3106 read_lock(&bond
->lock
);
3108 bond_ab_arp_commit(bond
, delta_in_ticks
);
3110 read_unlock(&bond
->lock
);
3112 read_lock(&bond
->lock
);
3115 bond_ab_arp_probe(bond
);
3118 if (bond
->params
.arp_interval
)
3119 queue_delayed_work(bond
->wq
, &bond
->arp_work
, delta_in_ticks
);
3121 read_unlock(&bond
->lock
);
3123 if (should_notify_peers
) {
3124 if (!rtnl_trylock()) {
3125 read_lock(&bond
->lock
);
3126 bond
->send_peer_notif
++;
3127 read_unlock(&bond
->lock
);
3130 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS
, bond
->dev
);
3135 /*-------------------------- netdev event handling --------------------------*/
3138 * Change device name
3140 static int bond_event_changename(struct bonding
*bond
)
3142 bond_remove_proc_entry(bond
);
3143 bond_create_proc_entry(bond
);
3145 bond_debug_reregister(bond
);
3150 static int bond_master_netdev_event(unsigned long event
,
3151 struct net_device
*bond_dev
)
3153 struct bonding
*event_bond
= netdev_priv(bond_dev
);
3156 case NETDEV_CHANGENAME
:
3157 return bond_event_changename(event_bond
);
3158 case NETDEV_UNREGISTER
:
3159 bond_remove_proc_entry(event_bond
);
3161 case NETDEV_REGISTER
:
3162 bond_create_proc_entry(event_bond
);
3171 static int bond_slave_netdev_event(unsigned long event
,
3172 struct net_device
*slave_dev
)
3174 struct slave
*slave
= bond_slave_get_rtnl(slave_dev
);
3175 struct bonding
*bond
;
3176 struct net_device
*bond_dev
;
3180 /* A netdev event can be generated while enslaving a device
3181 * before netdev_rx_handler_register is called in which case
3182 * slave will be NULL
3186 bond_dev
= slave
->bond
->dev
;
3190 case NETDEV_UNREGISTER
:
3191 if (bond_dev
->type
!= ARPHRD_ETHER
)
3192 bond_release_and_destroy(bond_dev
, slave_dev
);
3194 bond_release(bond_dev
, slave_dev
);
3198 old_speed
= slave
->speed
;
3199 old_duplex
= slave
->duplex
;
3201 bond_update_speed_duplex(slave
);
3203 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
3204 if (old_speed
!= slave
->speed
)
3205 bond_3ad_adapter_speed_changed(slave
);
3206 if (old_duplex
!= slave
->duplex
)
3207 bond_3ad_adapter_duplex_changed(slave
);
3212 * ... Or is it this?
3215 case NETDEV_CHANGEMTU
:
3217 * TODO: Should slaves be allowed to
3218 * independently alter their MTU? For
3219 * an active-backup bond, slaves need
3220 * not be the same type of device, so
3221 * MTUs may vary. For other modes,
3222 * slaves arguably should have the
3223 * same MTUs. To do this, we'd need to
3224 * take over the slave's change_mtu
3225 * function for the duration of their
3229 case NETDEV_CHANGENAME
:
3231 * TODO: handle changing the primary's name
3234 case NETDEV_FEAT_CHANGE
:
3235 bond_compute_features(bond
);
3245 * bond_netdev_event: handle netdev notifier chain events.
3247 * This function receives events for the netdev chain. The caller (an
3248 * ioctl handler calling blocking_notifier_call_chain) holds the necessary
3249 * locks for us to safely manipulate the slave devices (RTNL lock,
3252 static int bond_netdev_event(struct notifier_block
*this,
3253 unsigned long event
, void *ptr
)
3255 struct net_device
*event_dev
= netdev_notifier_info_to_dev(ptr
);
3257 pr_debug("event_dev: %s, event: %lx\n",
3258 event_dev
? event_dev
->name
: "None",
3261 if (!(event_dev
->priv_flags
& IFF_BONDING
))
3264 if (event_dev
->flags
& IFF_MASTER
) {
3265 pr_debug("IFF_MASTER\n");
3266 return bond_master_netdev_event(event
, event_dev
);
3269 if (event_dev
->flags
& IFF_SLAVE
) {
3270 pr_debug("IFF_SLAVE\n");
3271 return bond_slave_netdev_event(event
, event_dev
);
3277 static struct notifier_block bond_netdev_notifier
= {
3278 .notifier_call
= bond_netdev_event
,
3281 /*---------------------------- Hashing Policies -----------------------------*/
3284 * Hash for the output device based upon layer 2 data
3286 static int bond_xmit_hash_policy_l2(struct sk_buff
*skb
, int count
)
3288 struct ethhdr
*data
= (struct ethhdr
*)skb
->data
;
3290 if (skb_headlen(skb
) >= offsetof(struct ethhdr
, h_proto
))
3291 return (data
->h_dest
[5] ^ data
->h_source
[5]) % count
;
3297 * Hash for the output device based upon layer 2 and layer 3 data. If
3298 * the packet is not IP, fall back on bond_xmit_hash_policy_l2()
3300 static int bond_xmit_hash_policy_l23(struct sk_buff
*skb
, int count
)
3302 const struct ethhdr
*data
;
3303 const struct iphdr
*iph
;
3304 const struct ipv6hdr
*ipv6h
;
3306 const __be32
*s
, *d
;
3308 if (skb
->protocol
== htons(ETH_P_IP
) &&
3309 pskb_network_may_pull(skb
, sizeof(*iph
))) {
3311 data
= (struct ethhdr
*)skb
->data
;
3312 return ((ntohl(iph
->saddr
^ iph
->daddr
) & 0xffff) ^
3313 (data
->h_dest
[5] ^ data
->h_source
[5])) % count
;
3314 } else if (skb
->protocol
== htons(ETH_P_IPV6
) &&
3315 pskb_network_may_pull(skb
, sizeof(*ipv6h
))) {
3316 ipv6h
= ipv6_hdr(skb
);
3317 data
= (struct ethhdr
*)skb
->data
;
3318 s
= &ipv6h
->saddr
.s6_addr32
[0];
3319 d
= &ipv6h
->daddr
.s6_addr32
[0];
3320 v6hash
= (s
[1] ^ d
[1]) ^ (s
[2] ^ d
[2]) ^ (s
[3] ^ d
[3]);
3321 v6hash
^= (v6hash
>> 24) ^ (v6hash
>> 16) ^ (v6hash
>> 8);
3322 return (v6hash
^ data
->h_dest
[5] ^ data
->h_source
[5]) % count
;
3325 return bond_xmit_hash_policy_l2(skb
, count
);
3329 * Hash for the output device based upon layer 3 and layer 4 data. If
3330 * the packet is a frag or not TCP or UDP, just use layer 3 data. If it is
3331 * altogether not IP, fall back on bond_xmit_hash_policy_l2()
3333 static int bond_xmit_hash_policy_l34(struct sk_buff
*skb
, int count
)
3336 const struct iphdr
*iph
;
3337 const struct ipv6hdr
*ipv6h
;
3338 const __be32
*s
, *d
;
3339 const __be16
*l4
= NULL
;
3341 int noff
= skb_network_offset(skb
);
3344 if (skb
->protocol
== htons(ETH_P_IP
) &&
3345 pskb_may_pull(skb
, noff
+ sizeof(*iph
))) {
3347 poff
= proto_ports_offset(iph
->protocol
);
3349 if (!ip_is_fragment(iph
) && poff
>= 0) {
3350 l4
= skb_header_pointer(skb
, noff
+ (iph
->ihl
<< 2) + poff
,
3353 layer4_xor
= ntohs(l4
[0] ^ l4
[1]);
3355 return (layer4_xor
^
3356 ((ntohl(iph
->saddr
^ iph
->daddr
)) & 0xffff)) % count
;
3357 } else if (skb
->protocol
== htons(ETH_P_IPV6
) &&
3358 pskb_may_pull(skb
, noff
+ sizeof(*ipv6h
))) {
3359 ipv6h
= ipv6_hdr(skb
);
3360 poff
= proto_ports_offset(ipv6h
->nexthdr
);
3362 l4
= skb_header_pointer(skb
, noff
+ sizeof(*ipv6h
) + poff
,
3365 layer4_xor
= ntohs(l4
[0] ^ l4
[1]);
3367 s
= &ipv6h
->saddr
.s6_addr32
[0];
3368 d
= &ipv6h
->daddr
.s6_addr32
[0];
3369 layer4_xor
^= (s
[1] ^ d
[1]) ^ (s
[2] ^ d
[2]) ^ (s
[3] ^ d
[3]);
3370 layer4_xor
^= (layer4_xor
>> 24) ^ (layer4_xor
>> 16) ^
3372 return layer4_xor
% count
;
3375 return bond_xmit_hash_policy_l2(skb
, count
);
3378 /*-------------------------- Device entry points ----------------------------*/
3380 static void bond_work_init_all(struct bonding
*bond
)
3382 INIT_DELAYED_WORK(&bond
->mcast_work
,
3383 bond_resend_igmp_join_requests_delayed
);
3384 INIT_DELAYED_WORK(&bond
->alb_work
, bond_alb_monitor
);
3385 INIT_DELAYED_WORK(&bond
->mii_work
, bond_mii_monitor
);
3386 if (bond
->params
.mode
== BOND_MODE_ACTIVEBACKUP
)
3387 INIT_DELAYED_WORK(&bond
->arp_work
, bond_activebackup_arp_mon
);
3389 INIT_DELAYED_WORK(&bond
->arp_work
, bond_loadbalance_arp_mon
);
3390 INIT_DELAYED_WORK(&bond
->ad_work
, bond_3ad_state_machine_handler
);
3393 static void bond_work_cancel_all(struct bonding
*bond
)
3395 cancel_delayed_work_sync(&bond
->mii_work
);
3396 cancel_delayed_work_sync(&bond
->arp_work
);
3397 cancel_delayed_work_sync(&bond
->alb_work
);
3398 cancel_delayed_work_sync(&bond
->ad_work
);
3399 cancel_delayed_work_sync(&bond
->mcast_work
);
3402 static int bond_open(struct net_device
*bond_dev
)
3404 struct bonding
*bond
= netdev_priv(bond_dev
);
3405 struct slave
*slave
;
3408 /* reset slave->backup and slave->inactive */
3409 read_lock(&bond
->lock
);
3410 if (bond
->slave_cnt
> 0) {
3411 read_lock(&bond
->curr_slave_lock
);
3412 bond_for_each_slave(bond
, slave
, i
) {
3413 if ((bond
->params
.mode
== BOND_MODE_ACTIVEBACKUP
)
3414 && (slave
!= bond
->curr_active_slave
)) {
3415 bond_set_slave_inactive_flags(slave
);
3417 bond_set_slave_active_flags(slave
);
3420 read_unlock(&bond
->curr_slave_lock
);
3422 read_unlock(&bond
->lock
);
3424 bond_work_init_all(bond
);
3426 if (bond_is_lb(bond
)) {
3427 /* bond_alb_initialize must be called before the timer
3430 if (bond_alb_initialize(bond
, (bond
->params
.mode
== BOND_MODE_ALB
)))
3432 queue_delayed_work(bond
->wq
, &bond
->alb_work
, 0);
3435 if (bond
->params
.miimon
) /* link check interval, in milliseconds. */
3436 queue_delayed_work(bond
->wq
, &bond
->mii_work
, 0);
3438 if (bond
->params
.arp_interval
) { /* arp interval, in milliseconds. */
3439 queue_delayed_work(bond
->wq
, &bond
->arp_work
, 0);
3440 if (bond
->params
.arp_validate
)
3441 bond
->recv_probe
= bond_arp_rcv
;
3444 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
3445 queue_delayed_work(bond
->wq
, &bond
->ad_work
, 0);
3446 /* register to receive LACPDUs */
3447 bond
->recv_probe
= bond_3ad_lacpdu_recv
;
3448 bond_3ad_initiate_agg_selection(bond
, 1);
3454 static int bond_close(struct net_device
*bond_dev
)
3456 struct bonding
*bond
= netdev_priv(bond_dev
);
3458 write_lock_bh(&bond
->lock
);
3459 bond
->send_peer_notif
= 0;
3460 write_unlock_bh(&bond
->lock
);
3462 bond_work_cancel_all(bond
);
3463 if (bond_is_lb(bond
)) {
3464 /* Must be called only after all
3465 * slaves have been released
3467 bond_alb_deinitialize(bond
);
3469 bond
->recv_probe
= NULL
;
3474 static struct rtnl_link_stats64
*bond_get_stats(struct net_device
*bond_dev
,
3475 struct rtnl_link_stats64
*stats
)
3477 struct bonding
*bond
= netdev_priv(bond_dev
);
3478 struct rtnl_link_stats64 temp
;
3479 struct slave
*slave
;
3482 memset(stats
, 0, sizeof(*stats
));
3484 read_lock_bh(&bond
->lock
);
3486 bond_for_each_slave(bond
, slave
, i
) {
3487 const struct rtnl_link_stats64
*sstats
=
3488 dev_get_stats(slave
->dev
, &temp
);
3490 stats
->rx_packets
+= sstats
->rx_packets
;
3491 stats
->rx_bytes
+= sstats
->rx_bytes
;
3492 stats
->rx_errors
+= sstats
->rx_errors
;
3493 stats
->rx_dropped
+= sstats
->rx_dropped
;
3495 stats
->tx_packets
+= sstats
->tx_packets
;
3496 stats
->tx_bytes
+= sstats
->tx_bytes
;
3497 stats
->tx_errors
+= sstats
->tx_errors
;
3498 stats
->tx_dropped
+= sstats
->tx_dropped
;
3500 stats
->multicast
+= sstats
->multicast
;
3501 stats
->collisions
+= sstats
->collisions
;
3503 stats
->rx_length_errors
+= sstats
->rx_length_errors
;
3504 stats
->rx_over_errors
+= sstats
->rx_over_errors
;
3505 stats
->rx_crc_errors
+= sstats
->rx_crc_errors
;
3506 stats
->rx_frame_errors
+= sstats
->rx_frame_errors
;
3507 stats
->rx_fifo_errors
+= sstats
->rx_fifo_errors
;
3508 stats
->rx_missed_errors
+= sstats
->rx_missed_errors
;
3510 stats
->tx_aborted_errors
+= sstats
->tx_aborted_errors
;
3511 stats
->tx_carrier_errors
+= sstats
->tx_carrier_errors
;
3512 stats
->tx_fifo_errors
+= sstats
->tx_fifo_errors
;
3513 stats
->tx_heartbeat_errors
+= sstats
->tx_heartbeat_errors
;
3514 stats
->tx_window_errors
+= sstats
->tx_window_errors
;
3517 read_unlock_bh(&bond
->lock
);
3522 static int bond_do_ioctl(struct net_device
*bond_dev
, struct ifreq
*ifr
, int cmd
)
3524 struct net_device
*slave_dev
= NULL
;
3525 struct ifbond k_binfo
;
3526 struct ifbond __user
*u_binfo
= NULL
;
3527 struct ifslave k_sinfo
;
3528 struct ifslave __user
*u_sinfo
= NULL
;
3529 struct mii_ioctl_data
*mii
= NULL
;
3533 pr_debug("bond_ioctl: master=%s, cmd=%d\n", bond_dev
->name
, cmd
);
3545 * We do this again just in case we were called by SIOCGMIIREG
3546 * instead of SIOCGMIIPHY.
3553 if (mii
->reg_num
== 1) {
3554 struct bonding
*bond
= netdev_priv(bond_dev
);
3556 read_lock(&bond
->lock
);
3557 read_lock(&bond
->curr_slave_lock
);
3558 if (netif_carrier_ok(bond
->dev
))
3559 mii
->val_out
= BMSR_LSTATUS
;
3561 read_unlock(&bond
->curr_slave_lock
);
3562 read_unlock(&bond
->lock
);
3566 case BOND_INFO_QUERY_OLD
:
3567 case SIOCBONDINFOQUERY
:
3568 u_binfo
= (struct ifbond __user
*)ifr
->ifr_data
;
3570 if (copy_from_user(&k_binfo
, u_binfo
, sizeof(ifbond
)))
3573 res
= bond_info_query(bond_dev
, &k_binfo
);
3575 copy_to_user(u_binfo
, &k_binfo
, sizeof(ifbond
)))
3579 case BOND_SLAVE_INFO_QUERY_OLD
:
3580 case SIOCBONDSLAVEINFOQUERY
:
3581 u_sinfo
= (struct ifslave __user
*)ifr
->ifr_data
;
3583 if (copy_from_user(&k_sinfo
, u_sinfo
, sizeof(ifslave
)))
3586 res
= bond_slave_info_query(bond_dev
, &k_sinfo
);
3588 copy_to_user(u_sinfo
, &k_sinfo
, sizeof(ifslave
)))
3597 net
= dev_net(bond_dev
);
3599 if (!ns_capable(net
->user_ns
, CAP_NET_ADMIN
))
3602 slave_dev
= dev_get_by_name(net
, ifr
->ifr_slave
);
3604 pr_debug("slave_dev=%p:\n", slave_dev
);
3609 pr_debug("slave_dev->name=%s:\n", slave_dev
->name
);
3611 case BOND_ENSLAVE_OLD
:
3612 case SIOCBONDENSLAVE
:
3613 res
= bond_enslave(bond_dev
, slave_dev
);
3615 case BOND_RELEASE_OLD
:
3616 case SIOCBONDRELEASE
:
3617 res
= bond_release(bond_dev
, slave_dev
);
3619 case BOND_SETHWADDR_OLD
:
3620 case SIOCBONDSETHWADDR
:
3621 bond_set_dev_addr(bond_dev
, slave_dev
);
3624 case BOND_CHANGE_ACTIVE_OLD
:
3625 case SIOCBONDCHANGEACTIVE
:
3626 res
= bond_ioctl_change_active(bond_dev
, slave_dev
);
3638 static void bond_change_rx_flags(struct net_device
*bond_dev
, int change
)
3640 struct bonding
*bond
= netdev_priv(bond_dev
);
3642 if (change
& IFF_PROMISC
)
3643 bond_set_promiscuity(bond
,
3644 bond_dev
->flags
& IFF_PROMISC
? 1 : -1);
3646 if (change
& IFF_ALLMULTI
)
3647 bond_set_allmulti(bond
,
3648 bond_dev
->flags
& IFF_ALLMULTI
? 1 : -1);
3651 static void bond_set_rx_mode(struct net_device
*bond_dev
)
3653 struct bonding
*bond
= netdev_priv(bond_dev
);
3654 struct slave
*slave
;
3657 read_lock(&bond
->lock
);
3659 if (USES_PRIMARY(bond
->params
.mode
)) {
3660 read_lock(&bond
->curr_slave_lock
);
3661 slave
= bond
->curr_active_slave
;
3663 dev_uc_sync(slave
->dev
, bond_dev
);
3664 dev_mc_sync(slave
->dev
, bond_dev
);
3666 read_unlock(&bond
->curr_slave_lock
);
3668 bond_for_each_slave(bond
, slave
, i
) {
3669 dev_uc_sync_multiple(slave
->dev
, bond_dev
);
3670 dev_mc_sync_multiple(slave
->dev
, bond_dev
);
3674 read_unlock(&bond
->lock
);
3677 static int bond_neigh_init(struct neighbour
*n
)
3679 struct bonding
*bond
= netdev_priv(n
->dev
);
3680 struct slave
*slave
= bond
->first_slave
;
3681 const struct net_device_ops
*slave_ops
;
3682 struct neigh_parms parms
;
3688 slave_ops
= slave
->dev
->netdev_ops
;
3690 if (!slave_ops
->ndo_neigh_setup
)
3693 parms
.neigh_setup
= NULL
;
3694 parms
.neigh_cleanup
= NULL
;
3695 ret
= slave_ops
->ndo_neigh_setup(slave
->dev
, &parms
);
3700 * Assign slave's neigh_cleanup to neighbour in case cleanup is called
3701 * after the last slave has been detached. Assumes that all slaves
3702 * utilize the same neigh_cleanup (true at this writing as only user
3705 n
->parms
->neigh_cleanup
= parms
.neigh_cleanup
;
3707 if (!parms
.neigh_setup
)
3710 return parms
.neigh_setup(n
);
3714 * The bonding ndo_neigh_setup is called at init time beofre any
3715 * slave exists. So we must declare proxy setup function which will
3716 * be used at run time to resolve the actual slave neigh param setup.
3718 static int bond_neigh_setup(struct net_device
*dev
,
3719 struct neigh_parms
*parms
)
3721 parms
->neigh_setup
= bond_neigh_init
;
3727 * Change the MTU of all of a master's slaves to match the master
3729 static int bond_change_mtu(struct net_device
*bond_dev
, int new_mtu
)
3731 struct bonding
*bond
= netdev_priv(bond_dev
);
3732 struct slave
*slave
, *stop_at
;
3736 pr_debug("bond=%p, name=%s, new_mtu=%d\n", bond
,
3737 (bond_dev
? bond_dev
->name
: "None"), new_mtu
);
3739 /* Can't hold bond->lock with bh disabled here since
3740 * some base drivers panic. On the other hand we can't
3741 * hold bond->lock without bh disabled because we'll
3742 * deadlock. The only solution is to rely on the fact
3743 * that we're under rtnl_lock here, and the slaves
3744 * list won't change. This doesn't solve the problem
3745 * of setting the slave's MTU while it is
3746 * transmitting, but the assumption is that the base
3747 * driver can handle that.
3749 * TODO: figure out a way to safely iterate the slaves
3750 * list, but without holding a lock around the actual
3751 * call to the base driver.
3754 bond_for_each_slave(bond
, slave
, i
) {
3755 pr_debug("s %p s->p %p c_m %p\n",
3758 slave
->dev
->netdev_ops
->ndo_change_mtu
);
3760 res
= dev_set_mtu(slave
->dev
, new_mtu
);
3763 /* If we failed to set the slave's mtu to the new value
3764 * we must abort the operation even in ACTIVE_BACKUP
3765 * mode, because if we allow the backup slaves to have
3766 * different mtu values than the active slave we'll
3767 * need to change their mtu when doing a failover. That
3768 * means changing their mtu from timer context, which
3769 * is probably not a good idea.
3771 pr_debug("err %d %s\n", res
, slave
->dev
->name
);
3776 bond_dev
->mtu
= new_mtu
;
3781 /* unwind from head to the slave that failed */
3783 bond_for_each_slave_from_to(bond
, slave
, i
, bond
->first_slave
, stop_at
) {
3786 tmp_res
= dev_set_mtu(slave
->dev
, bond_dev
->mtu
);
3788 pr_debug("unwind err %d dev %s\n",
3789 tmp_res
, slave
->dev
->name
);
3799 * Note that many devices must be down to change the HW address, and
3800 * downing the master releases all slaves. We can make bonds full of
3801 * bonding devices to test this, however.
3803 static int bond_set_mac_address(struct net_device
*bond_dev
, void *addr
)
3805 struct bonding
*bond
= netdev_priv(bond_dev
);
3806 struct sockaddr
*sa
= addr
, tmp_sa
;
3807 struct slave
*slave
, *stop_at
;
3811 if (bond
->params
.mode
== BOND_MODE_ALB
)
3812 return bond_alb_set_mac_address(bond_dev
, addr
);
3815 pr_debug("bond=%p, name=%s\n",
3816 bond
, bond_dev
? bond_dev
->name
: "None");
3818 /* If fail_over_mac is enabled, do nothing and return success.
3819 * Returning an error causes ifenslave to fail.
3821 if (bond
->params
.fail_over_mac
)
3824 if (!is_valid_ether_addr(sa
->sa_data
))
3825 return -EADDRNOTAVAIL
;
3827 /* Can't hold bond->lock with bh disabled here since
3828 * some base drivers panic. On the other hand we can't
3829 * hold bond->lock without bh disabled because we'll
3830 * deadlock. The only solution is to rely on the fact
3831 * that we're under rtnl_lock here, and the slaves
3832 * list won't change. This doesn't solve the problem
3833 * of setting the slave's hw address while it is
3834 * transmitting, but the assumption is that the base
3835 * driver can handle that.
3837 * TODO: figure out a way to safely iterate the slaves
3838 * list, but without holding a lock around the actual
3839 * call to the base driver.
3842 bond_for_each_slave(bond
, slave
, i
) {
3843 const struct net_device_ops
*slave_ops
= slave
->dev
->netdev_ops
;
3844 pr_debug("slave %p %s\n", slave
, slave
->dev
->name
);
3846 if (slave_ops
->ndo_set_mac_address
== NULL
) {
3848 pr_debug("EOPNOTSUPP %s\n", slave
->dev
->name
);
3852 res
= dev_set_mac_address(slave
->dev
, addr
);
3854 /* TODO: consider downing the slave
3856 * User should expect communications
3857 * breakage anyway until ARP finish
3860 pr_debug("err %d %s\n", res
, slave
->dev
->name
);
3866 memcpy(bond_dev
->dev_addr
, sa
->sa_data
, bond_dev
->addr_len
);
3870 memcpy(tmp_sa
.sa_data
, bond_dev
->dev_addr
, bond_dev
->addr_len
);
3871 tmp_sa
.sa_family
= bond_dev
->type
;
3873 /* unwind from head to the slave that failed */
3875 bond_for_each_slave_from_to(bond
, slave
, i
, bond
->first_slave
, stop_at
) {
3878 tmp_res
= dev_set_mac_address(slave
->dev
, &tmp_sa
);
3880 pr_debug("unwind err %d dev %s\n",
3881 tmp_res
, slave
->dev
->name
);
3888 static int bond_xmit_roundrobin(struct sk_buff
*skb
, struct net_device
*bond_dev
)
3890 struct bonding
*bond
= netdev_priv(bond_dev
);
3891 struct slave
*slave
, *start_at
;
3892 int i
, slave_no
, res
= 1;
3893 struct iphdr
*iph
= ip_hdr(skb
);
3896 * Start with the curr_active_slave that joined the bond as the
3897 * default for sending IGMP traffic. For failover purposes one
3898 * needs to maintain some consistency for the interface that will
3899 * send the join/membership reports. The curr_active_slave found
3900 * will send all of this type of traffic.
3902 if ((iph
->protocol
== IPPROTO_IGMP
) &&
3903 (skb
->protocol
== htons(ETH_P_IP
))) {
3905 read_lock(&bond
->curr_slave_lock
);
3906 slave
= bond
->curr_active_slave
;
3907 read_unlock(&bond
->curr_slave_lock
);
3913 * Concurrent TX may collide on rr_tx_counter; we accept
3914 * that as being rare enough not to justify using an
3917 slave_no
= bond
->rr_tx_counter
++ % bond
->slave_cnt
;
3919 bond_for_each_slave(bond
, slave
, i
) {
3927 bond_for_each_slave_from(bond
, slave
, i
, start_at
) {
3928 if (IS_UP(slave
->dev
) &&
3929 (slave
->link
== BOND_LINK_UP
) &&
3930 bond_is_active_slave(slave
)) {
3931 res
= bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
3938 /* no suitable interface, frame not sent */
3942 return NETDEV_TX_OK
;
3947 * in active-backup mode, we know that bond->curr_active_slave is always valid if
3948 * the bond has a usable interface.
3950 static int bond_xmit_activebackup(struct sk_buff
*skb
, struct net_device
*bond_dev
)
3952 struct bonding
*bond
= netdev_priv(bond_dev
);
3955 read_lock(&bond
->curr_slave_lock
);
3957 if (bond
->curr_active_slave
)
3958 res
= bond_dev_queue_xmit(bond
, skb
,
3959 bond
->curr_active_slave
->dev
);
3961 read_unlock(&bond
->curr_slave_lock
);
3964 /* no suitable interface, frame not sent */
3967 return NETDEV_TX_OK
;
3971 * In bond_xmit_xor() , we determine the output device by using a pre-
3972 * determined xmit_hash_policy(), If the selected device is not enabled,
3973 * find the next active slave.
3975 static int bond_xmit_xor(struct sk_buff
*skb
, struct net_device
*bond_dev
)
3977 struct bonding
*bond
= netdev_priv(bond_dev
);
3978 struct slave
*slave
, *start_at
;
3983 slave_no
= bond
->xmit_hash_policy(skb
, bond
->slave_cnt
);
3985 bond_for_each_slave(bond
, slave
, i
) {
3993 bond_for_each_slave_from(bond
, slave
, i
, start_at
) {
3994 if (IS_UP(slave
->dev
) &&
3995 (slave
->link
== BOND_LINK_UP
) &&
3996 bond_is_active_slave(slave
)) {
3997 res
= bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
4003 /* no suitable interface, frame not sent */
4007 return NETDEV_TX_OK
;
4011 * in broadcast mode, we send everything to all usable interfaces.
4013 static int bond_xmit_broadcast(struct sk_buff
*skb
, struct net_device
*bond_dev
)
4015 struct bonding
*bond
= netdev_priv(bond_dev
);
4016 struct slave
*slave
, *start_at
;
4017 struct net_device
*tx_dev
= NULL
;
4021 read_lock(&bond
->curr_slave_lock
);
4022 start_at
= bond
->curr_active_slave
;
4023 read_unlock(&bond
->curr_slave_lock
);
4028 bond_for_each_slave_from(bond
, slave
, i
, start_at
) {
4029 if (IS_UP(slave
->dev
) &&
4030 (slave
->link
== BOND_LINK_UP
) &&
4031 bond_is_active_slave(slave
)) {
4033 struct sk_buff
*skb2
= skb_clone(skb
, GFP_ATOMIC
);
4035 pr_err("%s: Error: bond_xmit_broadcast(): skb_clone() failed\n",
4040 res
= bond_dev_queue_xmit(bond
, skb2
, tx_dev
);
4046 tx_dev
= slave
->dev
;
4051 res
= bond_dev_queue_xmit(bond
, skb
, tx_dev
);
4055 /* no suitable interface, frame not sent */
4058 /* frame sent to all suitable interfaces */
4059 return NETDEV_TX_OK
;
4062 /*------------------------- Device initialization ---------------------------*/
4064 static void bond_set_xmit_hash_policy(struct bonding
*bond
)
4066 switch (bond
->params
.xmit_policy
) {
4067 case BOND_XMIT_POLICY_LAYER23
:
4068 bond
->xmit_hash_policy
= bond_xmit_hash_policy_l23
;
4070 case BOND_XMIT_POLICY_LAYER34
:
4071 bond
->xmit_hash_policy
= bond_xmit_hash_policy_l34
;
4073 case BOND_XMIT_POLICY_LAYER2
:
4075 bond
->xmit_hash_policy
= bond_xmit_hash_policy_l2
;
4081 * Lookup the slave that corresponds to a qid
4083 static inline int bond_slave_override(struct bonding
*bond
,
4084 struct sk_buff
*skb
)
4087 struct slave
*slave
= NULL
;
4088 struct slave
*check_slave
;
4090 if (!skb
->queue_mapping
)
4093 /* Find out if any slaves have the same mapping as this skb. */
4094 bond_for_each_slave(bond
, check_slave
, i
) {
4095 if (check_slave
->queue_id
== skb
->queue_mapping
) {
4096 slave
= check_slave
;
4101 /* If the slave isn't UP, use default transmit policy. */
4102 if (slave
&& slave
->queue_id
&& IS_UP(slave
->dev
) &&
4103 (slave
->link
== BOND_LINK_UP
)) {
4104 res
= bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
4111 static u16
bond_select_queue(struct net_device
*dev
, struct sk_buff
*skb
)
4114 * This helper function exists to help dev_pick_tx get the correct
4115 * destination queue. Using a helper function skips a call to
4116 * skb_tx_hash and will put the skbs in the queue we expect on their
4117 * way down to the bonding driver.
4119 u16 txq
= skb_rx_queue_recorded(skb
) ? skb_get_rx_queue(skb
) : 0;
4122 * Save the original txq to restore before passing to the driver
4124 qdisc_skb_cb(skb
)->slave_dev_queue_mapping
= skb
->queue_mapping
;
4126 if (unlikely(txq
>= dev
->real_num_tx_queues
)) {
4128 txq
-= dev
->real_num_tx_queues
;
4129 } while (txq
>= dev
->real_num_tx_queues
);
4134 static netdev_tx_t
__bond_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
4136 struct bonding
*bond
= netdev_priv(dev
);
4138 if (TX_QUEUE_OVERRIDE(bond
->params
.mode
)) {
4139 if (!bond_slave_override(bond
, skb
))
4140 return NETDEV_TX_OK
;
4143 switch (bond
->params
.mode
) {
4144 case BOND_MODE_ROUNDROBIN
:
4145 return bond_xmit_roundrobin(skb
, dev
);
4146 case BOND_MODE_ACTIVEBACKUP
:
4147 return bond_xmit_activebackup(skb
, dev
);
4149 return bond_xmit_xor(skb
, dev
);
4150 case BOND_MODE_BROADCAST
:
4151 return bond_xmit_broadcast(skb
, dev
);
4152 case BOND_MODE_8023AD
:
4153 return bond_3ad_xmit_xor(skb
, dev
);
4156 return bond_alb_xmit(skb
, dev
);
4158 /* Should never happen, mode already checked */
4159 pr_err("%s: Error: Unknown bonding mode %d\n",
4160 dev
->name
, bond
->params
.mode
);
4163 return NETDEV_TX_OK
;
4167 static netdev_tx_t
bond_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
4169 struct bonding
*bond
= netdev_priv(dev
);
4170 netdev_tx_t ret
= NETDEV_TX_OK
;
4173 * If we risk deadlock from transmitting this in the
4174 * netpoll path, tell netpoll to queue the frame for later tx
4176 if (is_netpoll_tx_blocked(dev
))
4177 return NETDEV_TX_BUSY
;
4179 read_lock(&bond
->lock
);
4181 if (bond
->slave_cnt
)
4182 ret
= __bond_start_xmit(skb
, dev
);
4186 read_unlock(&bond
->lock
);
4192 * set bond mode specific net device operations
4194 void bond_set_mode_ops(struct bonding
*bond
, int mode
)
4196 struct net_device
*bond_dev
= bond
->dev
;
4199 case BOND_MODE_ROUNDROBIN
:
4201 case BOND_MODE_ACTIVEBACKUP
:
4204 bond_set_xmit_hash_policy(bond
);
4206 case BOND_MODE_BROADCAST
:
4208 case BOND_MODE_8023AD
:
4209 bond_set_xmit_hash_policy(bond
);
4216 /* Should never happen, mode already checked */
4217 pr_err("%s: Error: Unknown bonding mode %d\n",
4218 bond_dev
->name
, mode
);
4223 static int bond_ethtool_get_settings(struct net_device
*bond_dev
,
4224 struct ethtool_cmd
*ecmd
)
4226 struct bonding
*bond
= netdev_priv(bond_dev
);
4227 struct slave
*slave
;
4229 unsigned long speed
= 0;
4231 ecmd
->duplex
= DUPLEX_UNKNOWN
;
4232 ecmd
->port
= PORT_OTHER
;
4234 /* Since SLAVE_IS_OK returns false for all inactive or down slaves, we
4235 * do not need to check mode. Though link speed might not represent
4236 * the true receive or transmit bandwidth (not all modes are symmetric)
4237 * this is an accurate maximum.
4239 read_lock(&bond
->lock
);
4240 bond_for_each_slave(bond
, slave
, i
) {
4241 if (SLAVE_IS_OK(slave
)) {
4242 if (slave
->speed
!= SPEED_UNKNOWN
)
4243 speed
+= slave
->speed
;
4244 if (ecmd
->duplex
== DUPLEX_UNKNOWN
&&
4245 slave
->duplex
!= DUPLEX_UNKNOWN
)
4246 ecmd
->duplex
= slave
->duplex
;
4249 ethtool_cmd_speed_set(ecmd
, speed
? : SPEED_UNKNOWN
);
4250 read_unlock(&bond
->lock
);
4254 static void bond_ethtool_get_drvinfo(struct net_device
*bond_dev
,
4255 struct ethtool_drvinfo
*drvinfo
)
4257 strlcpy(drvinfo
->driver
, DRV_NAME
, sizeof(drvinfo
->driver
));
4258 strlcpy(drvinfo
->version
, DRV_VERSION
, sizeof(drvinfo
->version
));
4259 snprintf(drvinfo
->fw_version
, sizeof(drvinfo
->fw_version
), "%d",
4263 static const struct ethtool_ops bond_ethtool_ops
= {
4264 .get_drvinfo
= bond_ethtool_get_drvinfo
,
4265 .get_settings
= bond_ethtool_get_settings
,
4266 .get_link
= ethtool_op_get_link
,
4269 static const struct net_device_ops bond_netdev_ops
= {
4270 .ndo_init
= bond_init
,
4271 .ndo_uninit
= bond_uninit
,
4272 .ndo_open
= bond_open
,
4273 .ndo_stop
= bond_close
,
4274 .ndo_start_xmit
= bond_start_xmit
,
4275 .ndo_select_queue
= bond_select_queue
,
4276 .ndo_get_stats64
= bond_get_stats
,
4277 .ndo_do_ioctl
= bond_do_ioctl
,
4278 .ndo_change_rx_flags
= bond_change_rx_flags
,
4279 .ndo_set_rx_mode
= bond_set_rx_mode
,
4280 .ndo_change_mtu
= bond_change_mtu
,
4281 .ndo_set_mac_address
= bond_set_mac_address
,
4282 .ndo_neigh_setup
= bond_neigh_setup
,
4283 .ndo_vlan_rx_add_vid
= bond_vlan_rx_add_vid
,
4284 .ndo_vlan_rx_kill_vid
= bond_vlan_rx_kill_vid
,
4285 #ifdef CONFIG_NET_POLL_CONTROLLER
4286 .ndo_netpoll_setup
= bond_netpoll_setup
,
4287 .ndo_netpoll_cleanup
= bond_netpoll_cleanup
,
4288 .ndo_poll_controller
= bond_poll_controller
,
4290 .ndo_add_slave
= bond_enslave
,
4291 .ndo_del_slave
= bond_release
,
4292 .ndo_fix_features
= bond_fix_features
,
4295 static const struct device_type bond_type
= {
4299 static void bond_destructor(struct net_device
*bond_dev
)
4301 struct bonding
*bond
= netdev_priv(bond_dev
);
4303 destroy_workqueue(bond
->wq
);
4304 free_netdev(bond_dev
);
4307 static void bond_setup(struct net_device
*bond_dev
)
4309 struct bonding
*bond
= netdev_priv(bond_dev
);
4311 /* initialize rwlocks */
4312 rwlock_init(&bond
->lock
);
4313 rwlock_init(&bond
->curr_slave_lock
);
4315 bond
->params
= bonding_defaults
;
4317 /* Initialize pointers */
4318 bond
->dev
= bond_dev
;
4319 INIT_LIST_HEAD(&bond
->vlan_list
);
4321 /* Initialize the device entry points */
4322 ether_setup(bond_dev
);
4323 bond_dev
->netdev_ops
= &bond_netdev_ops
;
4324 bond_dev
->ethtool_ops
= &bond_ethtool_ops
;
4325 bond_set_mode_ops(bond
, bond
->params
.mode
);
4327 bond_dev
->destructor
= bond_destructor
;
4329 SET_NETDEV_DEVTYPE(bond_dev
, &bond_type
);
4331 /* Initialize the device options */
4332 bond_dev
->tx_queue_len
= 0;
4333 bond_dev
->flags
|= IFF_MASTER
|IFF_MULTICAST
;
4334 bond_dev
->priv_flags
|= IFF_BONDING
;
4335 bond_dev
->priv_flags
&= ~(IFF_XMIT_DST_RELEASE
| IFF_TX_SKB_SHARING
);
4337 /* At first, we block adding VLANs. That's the only way to
4338 * prevent problems that occur when adding VLANs over an
4339 * empty bond. The block will be removed once non-challenged
4340 * slaves are enslaved.
4342 bond_dev
->features
|= NETIF_F_VLAN_CHALLENGED
;
4344 /* don't acquire bond device's netif_tx_lock when
4346 bond_dev
->features
|= NETIF_F_LLTX
;
4348 /* By default, we declare the bond to be fully
4349 * VLAN hardware accelerated capable. Special
4350 * care is taken in the various xmit functions
4351 * when there are slaves that are not hw accel
4355 bond_dev
->hw_features
= BOND_VLAN_FEATURES
|
4356 NETIF_F_HW_VLAN_CTAG_TX
|
4357 NETIF_F_HW_VLAN_CTAG_RX
|
4358 NETIF_F_HW_VLAN_CTAG_FILTER
;
4360 bond_dev
->hw_features
&= ~(NETIF_F_ALL_CSUM
& ~NETIF_F_HW_CSUM
);
4361 bond_dev
->features
|= bond_dev
->hw_features
;
4365 * Destroy a bonding device.
4366 * Must be under rtnl_lock when this function is called.
4368 static void bond_uninit(struct net_device
*bond_dev
)
4370 struct bonding
*bond
= netdev_priv(bond_dev
);
4371 struct vlan_entry
*vlan
, *tmp
;
4373 bond_netpoll_cleanup(bond_dev
);
4375 /* Release the bonded slaves */
4376 while (bond
->first_slave
!= NULL
)
4377 __bond_release_one(bond_dev
, bond
->first_slave
->dev
, true);
4378 pr_info("%s: released all slaves\n", bond_dev
->name
);
4380 list_del(&bond
->bond_list
);
4382 bond_debug_unregister(bond
);
4384 list_for_each_entry_safe(vlan
, tmp
, &bond
->vlan_list
, vlan_list
) {
4385 list_del(&vlan
->vlan_list
);
4390 /*------------------------- Module initialization ---------------------------*/
4393 * Convert string input module parms. Accept either the
4394 * number of the mode or its string name. A bit complicated because
4395 * some mode names are substrings of other names, and calls from sysfs
4396 * may have whitespace in the name (trailing newlines, for example).
4398 int bond_parse_parm(const char *buf
, const struct bond_parm_tbl
*tbl
)
4400 int modeint
= -1, i
, rv
;
4401 char *p
, modestr
[BOND_MAX_MODENAME_LEN
+ 1] = { 0, };
4403 for (p
= (char *)buf
; *p
; p
++)
4404 if (!(isdigit(*p
) || isspace(*p
)))
4408 rv
= sscanf(buf
, "%20s", modestr
);
4410 rv
= sscanf(buf
, "%d", &modeint
);
4415 for (i
= 0; tbl
[i
].modename
; i
++) {
4416 if (modeint
== tbl
[i
].mode
)
4418 if (strcmp(modestr
, tbl
[i
].modename
) == 0)
4425 static int bond_check_params(struct bond_params
*params
)
4427 int arp_validate_value
, fail_over_mac_value
, primary_reselect_value
, i
;
4428 int arp_all_targets_value
;
4431 * Convert string parameters.
4434 bond_mode
= bond_parse_parm(mode
, bond_mode_tbl
);
4435 if (bond_mode
== -1) {
4436 pr_err("Error: Invalid bonding mode \"%s\"\n",
4437 mode
== NULL
? "NULL" : mode
);
4442 if (xmit_hash_policy
) {
4443 if ((bond_mode
!= BOND_MODE_XOR
) &&
4444 (bond_mode
!= BOND_MODE_8023AD
)) {
4445 pr_info("xmit_hash_policy param is irrelevant in mode %s\n",
4446 bond_mode_name(bond_mode
));
4448 xmit_hashtype
= bond_parse_parm(xmit_hash_policy
,
4450 if (xmit_hashtype
== -1) {
4451 pr_err("Error: Invalid xmit_hash_policy \"%s\"\n",
4452 xmit_hash_policy
== NULL
? "NULL" :
4460 if (bond_mode
!= BOND_MODE_8023AD
) {
4461 pr_info("lacp_rate param is irrelevant in mode %s\n",
4462 bond_mode_name(bond_mode
));
4464 lacp_fast
= bond_parse_parm(lacp_rate
, bond_lacp_tbl
);
4465 if (lacp_fast
== -1) {
4466 pr_err("Error: Invalid lacp rate \"%s\"\n",
4467 lacp_rate
== NULL
? "NULL" : lacp_rate
);
4474 params
->ad_select
= bond_parse_parm(ad_select
, ad_select_tbl
);
4475 if (params
->ad_select
== -1) {
4476 pr_err("Error: Invalid ad_select \"%s\"\n",
4477 ad_select
== NULL
? "NULL" : ad_select
);
4481 if (bond_mode
!= BOND_MODE_8023AD
) {
4482 pr_warning("ad_select param only affects 802.3ad mode\n");
4485 params
->ad_select
= BOND_AD_STABLE
;
4488 if (max_bonds
< 0) {
4489 pr_warning("Warning: max_bonds (%d) not in range %d-%d, so it was reset to BOND_DEFAULT_MAX_BONDS (%d)\n",
4490 max_bonds
, 0, INT_MAX
, BOND_DEFAULT_MAX_BONDS
);
4491 max_bonds
= BOND_DEFAULT_MAX_BONDS
;
4495 pr_warning("Warning: miimon module parameter (%d), not in range 0-%d, so it was reset to %d\n",
4496 miimon
, INT_MAX
, BOND_LINK_MON_INTERV
);
4497 miimon
= BOND_LINK_MON_INTERV
;
4501 pr_warning("Warning: updelay module parameter (%d), not in range 0-%d, so it was reset to 0\n",
4506 if (downdelay
< 0) {
4507 pr_warning("Warning: downdelay module parameter (%d), not in range 0-%d, so it was reset to 0\n",
4508 downdelay
, INT_MAX
);
4512 if ((use_carrier
!= 0) && (use_carrier
!= 1)) {
4513 pr_warning("Warning: use_carrier module parameter (%d), not of valid value (0/1), so it was set to 1\n",
4518 if (num_peer_notif
< 0 || num_peer_notif
> 255) {
4519 pr_warning("Warning: num_grat_arp/num_unsol_na (%d) not in range 0-255 so it was reset to 1\n",
4524 /* reset values for 802.3ad */
4525 if (bond_mode
== BOND_MODE_8023AD
) {
4527 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");
4528 pr_warning("Forcing miimon to 100msec\n");
4533 if (tx_queues
< 1 || tx_queues
> 255) {
4534 pr_warning("Warning: tx_queues (%d) should be between "
4535 "1 and 255, resetting to %d\n",
4536 tx_queues
, BOND_DEFAULT_TX_QUEUES
);
4537 tx_queues
= BOND_DEFAULT_TX_QUEUES
;
4540 if ((all_slaves_active
!= 0) && (all_slaves_active
!= 1)) {
4541 pr_warning("Warning: all_slaves_active module parameter (%d), "
4542 "not of valid value (0/1), so it was set to "
4543 "0\n", all_slaves_active
);
4544 all_slaves_active
= 0;
4547 if (resend_igmp
< 0 || resend_igmp
> 255) {
4548 pr_warning("Warning: resend_igmp (%d) should be between "
4549 "0 and 255, resetting to %d\n",
4550 resend_igmp
, BOND_DEFAULT_RESEND_IGMP
);
4551 resend_igmp
= BOND_DEFAULT_RESEND_IGMP
;
4554 /* reset values for TLB/ALB */
4555 if ((bond_mode
== BOND_MODE_TLB
) ||
4556 (bond_mode
== BOND_MODE_ALB
)) {
4558 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");
4559 pr_warning("Forcing miimon to 100msec\n");
4564 if (bond_mode
== BOND_MODE_ALB
) {
4565 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",
4570 if (updelay
|| downdelay
) {
4571 /* just warn the user the up/down delay will have
4572 * no effect since miimon is zero...
4574 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",
4575 updelay
, downdelay
);
4578 /* don't allow arp monitoring */
4580 pr_warning("Warning: miimon (%d) and arp_interval (%d) can't be used simultaneously, disabling ARP monitoring\n",
4581 miimon
, arp_interval
);
4585 if ((updelay
% miimon
) != 0) {
4586 pr_warning("Warning: updelay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
4588 (updelay
/ miimon
) * miimon
);
4593 if ((downdelay
% miimon
) != 0) {
4594 pr_warning("Warning: downdelay (%d) is not a multiple of miimon (%d), downdelay rounded to %d ms\n",
4596 (downdelay
/ miimon
) * miimon
);
4599 downdelay
/= miimon
;
4602 if (arp_interval
< 0) {
4603 pr_warning("Warning: arp_interval module parameter (%d) , not in range 0-%d, so it was reset to %d\n",
4604 arp_interval
, INT_MAX
, BOND_LINK_ARP_INTERV
);
4605 arp_interval
= BOND_LINK_ARP_INTERV
;
4608 for (arp_ip_count
= 0, i
= 0;
4609 (arp_ip_count
< BOND_MAX_ARP_TARGETS
) && arp_ip_target
[i
]; i
++) {
4610 /* not complete check, but should be good enough to
4612 __be32 ip
= in_aton(arp_ip_target
[i
]);
4613 if (!isdigit(arp_ip_target
[i
][0]) || ip
== 0 ||
4614 ip
== htonl(INADDR_BROADCAST
)) {
4615 pr_warning("Warning: bad arp_ip_target module parameter (%s), ARP monitoring will not be performed\n",
4619 if (bond_get_targets_ip(arp_target
, ip
) == -1)
4620 arp_target
[arp_ip_count
++] = ip
;
4622 pr_warning("Warning: duplicate address %pI4 in arp_ip_target, skipping\n",
4627 if (arp_interval
&& !arp_ip_count
) {
4628 /* don't allow arping if no arp_ip_target given... */
4629 pr_warning("Warning: arp_interval module parameter (%d) specified without providing an arp_ip_target parameter, arp_interval was reset to 0\n",
4635 if (bond_mode
!= BOND_MODE_ACTIVEBACKUP
) {
4636 pr_err("arp_validate only supported in active-backup mode\n");
4639 if (!arp_interval
) {
4640 pr_err("arp_validate requires arp_interval\n");
4644 arp_validate_value
= bond_parse_parm(arp_validate
,
4646 if (arp_validate_value
== -1) {
4647 pr_err("Error: invalid arp_validate \"%s\"\n",
4648 arp_validate
== NULL
? "NULL" : arp_validate
);
4652 arp_validate_value
= 0;
4654 arp_all_targets_value
= 0;
4655 if (arp_all_targets
) {
4656 arp_all_targets_value
= bond_parse_parm(arp_all_targets
,
4657 arp_all_targets_tbl
);
4659 if (arp_all_targets_value
== -1) {
4660 pr_err("Error: invalid arp_all_targets_value \"%s\"\n",
4662 arp_all_targets_value
= 0;
4667 pr_info("MII link monitoring set to %d ms\n", miimon
);
4668 } else if (arp_interval
) {
4669 pr_info("ARP monitoring set to %d ms, validate %s, with %d target(s):",
4671 arp_validate_tbl
[arp_validate_value
].modename
,
4674 for (i
= 0; i
< arp_ip_count
; i
++)
4675 pr_info(" %s", arp_ip_target
[i
]);
4679 } else if (max_bonds
) {
4680 /* miimon and arp_interval not set, we need one so things
4681 * work as expected, see bonding.txt for details
4683 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");
4686 if (primary
&& !USES_PRIMARY(bond_mode
)) {
4687 /* currently, using a primary only makes sense
4688 * in active backup, TLB or ALB modes
4690 pr_warning("Warning: %s primary device specified but has no effect in %s mode\n",
4691 primary
, bond_mode_name(bond_mode
));
4695 if (primary
&& primary_reselect
) {
4696 primary_reselect_value
= bond_parse_parm(primary_reselect
,
4698 if (primary_reselect_value
== -1) {
4699 pr_err("Error: Invalid primary_reselect \"%s\"\n",
4701 NULL
? "NULL" : primary_reselect
);
4705 primary_reselect_value
= BOND_PRI_RESELECT_ALWAYS
;
4708 if (fail_over_mac
) {
4709 fail_over_mac_value
= bond_parse_parm(fail_over_mac
,
4711 if (fail_over_mac_value
== -1) {
4712 pr_err("Error: invalid fail_over_mac \"%s\"\n",
4713 arp_validate
== NULL
? "NULL" : arp_validate
);
4717 if (bond_mode
!= BOND_MODE_ACTIVEBACKUP
)
4718 pr_warning("Warning: fail_over_mac only affects active-backup mode.\n");
4720 fail_over_mac_value
= BOND_FOM_NONE
;
4723 /* fill params struct with the proper values */
4724 params
->mode
= bond_mode
;
4725 params
->xmit_policy
= xmit_hashtype
;
4726 params
->miimon
= miimon
;
4727 params
->num_peer_notif
= num_peer_notif
;
4728 params
->arp_interval
= arp_interval
;
4729 params
->arp_validate
= arp_validate_value
;
4730 params
->arp_all_targets
= arp_all_targets_value
;
4731 params
->updelay
= updelay
;
4732 params
->downdelay
= downdelay
;
4733 params
->use_carrier
= use_carrier
;
4734 params
->lacp_fast
= lacp_fast
;
4735 params
->primary
[0] = 0;
4736 params
->primary_reselect
= primary_reselect_value
;
4737 params
->fail_over_mac
= fail_over_mac_value
;
4738 params
->tx_queues
= tx_queues
;
4739 params
->all_slaves_active
= all_slaves_active
;
4740 params
->resend_igmp
= resend_igmp
;
4741 params
->min_links
= min_links
;
4744 strncpy(params
->primary
, primary
, IFNAMSIZ
);
4745 params
->primary
[IFNAMSIZ
- 1] = 0;
4748 memcpy(params
->arp_targets
, arp_target
, sizeof(arp_target
));
4753 static struct lock_class_key bonding_netdev_xmit_lock_key
;
4754 static struct lock_class_key bonding_netdev_addr_lock_key
;
4755 static struct lock_class_key bonding_tx_busylock_key
;
4757 static void bond_set_lockdep_class_one(struct net_device
*dev
,
4758 struct netdev_queue
*txq
,
4761 lockdep_set_class(&txq
->_xmit_lock
,
4762 &bonding_netdev_xmit_lock_key
);
4765 static void bond_set_lockdep_class(struct net_device
*dev
)
4767 lockdep_set_class(&dev
->addr_list_lock
,
4768 &bonding_netdev_addr_lock_key
);
4769 netdev_for_each_tx_queue(dev
, bond_set_lockdep_class_one
, NULL
);
4770 dev
->qdisc_tx_busylock
= &bonding_tx_busylock_key
;
4774 * Called from registration process
4776 static int bond_init(struct net_device
*bond_dev
)
4778 struct bonding
*bond
= netdev_priv(bond_dev
);
4779 struct bond_net
*bn
= net_generic(dev_net(bond_dev
), bond_net_id
);
4780 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
4782 pr_debug("Begin bond_init for %s\n", bond_dev
->name
);
4785 * Initialize locks that may be required during
4786 * en/deslave operations. All of the bond_open work
4787 * (of which this is part) should really be moved to
4788 * a phase prior to dev_open
4790 spin_lock_init(&(bond_info
->tx_hashtbl_lock
));
4791 spin_lock_init(&(bond_info
->rx_hashtbl_lock
));
4793 bond
->wq
= create_singlethread_workqueue(bond_dev
->name
);
4797 bond_set_lockdep_class(bond_dev
);
4799 list_add_tail(&bond
->bond_list
, &bn
->dev_list
);
4801 bond_prepare_sysfs_group(bond
);
4803 bond_debug_register(bond
);
4805 /* Ensure valid dev_addr */
4806 if (is_zero_ether_addr(bond_dev
->dev_addr
) &&
4807 bond_dev
->addr_assign_type
== NET_ADDR_PERM
)
4808 eth_hw_addr_random(bond_dev
);
4813 static int bond_validate(struct nlattr
*tb
[], struct nlattr
*data
[])
4815 if (tb
[IFLA_ADDRESS
]) {
4816 if (nla_len(tb
[IFLA_ADDRESS
]) != ETH_ALEN
)
4818 if (!is_valid_ether_addr(nla_data(tb
[IFLA_ADDRESS
])))
4819 return -EADDRNOTAVAIL
;
4824 static unsigned int bond_get_num_tx_queues(void)
4829 static struct rtnl_link_ops bond_link_ops __read_mostly
= {
4831 .priv_size
= sizeof(struct bonding
),
4832 .setup
= bond_setup
,
4833 .validate
= bond_validate
,
4834 .get_num_tx_queues
= bond_get_num_tx_queues
,
4835 .get_num_rx_queues
= bond_get_num_tx_queues
, /* Use the same number
4839 /* Create a new bond based on the specified name and bonding parameters.
4840 * If name is NULL, obtain a suitable "bond%d" name for us.
4841 * Caller must NOT hold rtnl_lock; we need to release it here before we
4842 * set up our sysfs entries.
4844 int bond_create(struct net
*net
, const char *name
)
4846 struct net_device
*bond_dev
;
4851 bond_dev
= alloc_netdev_mq(sizeof(struct bonding
),
4852 name
? name
: "bond%d",
4853 bond_setup
, tx_queues
);
4855 pr_err("%s: eek! can't alloc netdev!\n", name
);
4860 dev_net_set(bond_dev
, net
);
4861 bond_dev
->rtnl_link_ops
= &bond_link_ops
;
4863 res
= register_netdevice(bond_dev
);
4865 netif_carrier_off(bond_dev
);
4869 bond_destructor(bond_dev
);
4873 static int __net_init
bond_net_init(struct net
*net
)
4875 struct bond_net
*bn
= net_generic(net
, bond_net_id
);
4878 INIT_LIST_HEAD(&bn
->dev_list
);
4880 bond_create_proc_dir(bn
);
4881 bond_create_sysfs(bn
);
4886 static void __net_exit
bond_net_exit(struct net
*net
)
4888 struct bond_net
*bn
= net_generic(net
, bond_net_id
);
4889 struct bonding
*bond
, *tmp_bond
;
4892 bond_destroy_sysfs(bn
);
4893 bond_destroy_proc_dir(bn
);
4895 /* Kill off any bonds created after unregistering bond rtnl ops */
4897 list_for_each_entry_safe(bond
, tmp_bond
, &bn
->dev_list
, bond_list
)
4898 unregister_netdevice_queue(bond
->dev
, &list
);
4899 unregister_netdevice_many(&list
);
4903 static struct pernet_operations bond_net_ops
= {
4904 .init
= bond_net_init
,
4905 .exit
= bond_net_exit
,
4907 .size
= sizeof(struct bond_net
),
4910 static int __init
bonding_init(void)
4915 pr_info("%s", bond_version
);
4917 res
= bond_check_params(&bonding_defaults
);
4921 res
= register_pernet_subsys(&bond_net_ops
);
4925 res
= rtnl_link_register(&bond_link_ops
);
4929 bond_create_debugfs();
4931 for (i
= 0; i
< max_bonds
; i
++) {
4932 res
= bond_create(&init_net
, NULL
);
4937 register_netdevice_notifier(&bond_netdev_notifier
);
4941 rtnl_link_unregister(&bond_link_ops
);
4943 unregister_pernet_subsys(&bond_net_ops
);
4948 static void __exit
bonding_exit(void)
4950 unregister_netdevice_notifier(&bond_netdev_notifier
);
4952 bond_destroy_debugfs();
4954 rtnl_link_unregister(&bond_link_ops
);
4955 unregister_pernet_subsys(&bond_net_ops
);
4957 #ifdef CONFIG_NET_POLL_CONTROLLER
4959 * Make sure we don't have an imbalance on our netpoll blocking
4961 WARN_ON(atomic_read(&netpoll_block_tx
));
4965 module_init(bonding_init
);
4966 module_exit(bonding_exit
);
4967 MODULE_LICENSE("GPL");
4968 MODULE_VERSION(DRV_VERSION
);
4969 MODULE_DESCRIPTION(DRV_DESCRIPTION
", v" DRV_VERSION
);
4970 MODULE_AUTHOR("Thomas Davis, tadavis@lbl.gov and many others");
4971 MODULE_ALIAS_RTNL_LINK("bond");