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 *fail_over_mac
;
108 static int all_slaves_active
= 0;
109 static struct bond_params bonding_defaults
;
110 static int resend_igmp
= BOND_DEFAULT_RESEND_IGMP
;
112 module_param(max_bonds
, int, 0);
113 MODULE_PARM_DESC(max_bonds
, "Max number of bonded devices");
114 module_param(tx_queues
, int, 0);
115 MODULE_PARM_DESC(tx_queues
, "Max number of transmit queues (default = 16)");
116 module_param_named(num_grat_arp
, num_peer_notif
, int, 0644);
117 MODULE_PARM_DESC(num_grat_arp
, "Number of peer notifications to send on "
118 "failover event (alias of num_unsol_na)");
119 module_param_named(num_unsol_na
, num_peer_notif
, int, 0644);
120 MODULE_PARM_DESC(num_unsol_na
, "Number of peer notifications to send on "
121 "failover event (alias of num_grat_arp)");
122 module_param(miimon
, int, 0);
123 MODULE_PARM_DESC(miimon
, "Link check interval in milliseconds");
124 module_param(updelay
, int, 0);
125 MODULE_PARM_DESC(updelay
, "Delay before considering link up, in milliseconds");
126 module_param(downdelay
, int, 0);
127 MODULE_PARM_DESC(downdelay
, "Delay before considering link down, "
129 module_param(use_carrier
, int, 0);
130 MODULE_PARM_DESC(use_carrier
, "Use netif_carrier_ok (vs MII ioctls) in miimon; "
131 "0 for off, 1 for on (default)");
132 module_param(mode
, charp
, 0);
133 MODULE_PARM_DESC(mode
, "Mode of operation; 0 for balance-rr, "
134 "1 for active-backup, 2 for balance-xor, "
135 "3 for broadcast, 4 for 802.3ad, 5 for balance-tlb, "
136 "6 for balance-alb");
137 module_param(primary
, charp
, 0);
138 MODULE_PARM_DESC(primary
, "Primary network device to use");
139 module_param(primary_reselect
, charp
, 0);
140 MODULE_PARM_DESC(primary_reselect
, "Reselect primary slave "
142 "0 for always (default), "
143 "1 for only if speed of primary is "
145 "2 for only on active slave "
147 module_param(lacp_rate
, charp
, 0);
148 MODULE_PARM_DESC(lacp_rate
, "LACPDU tx rate to request from 802.3ad partner; "
149 "0 for slow, 1 for fast");
150 module_param(ad_select
, charp
, 0);
151 MODULE_PARM_DESC(ad_select
, "803.ad aggregation selection logic; "
152 "0 for stable (default), 1 for bandwidth, "
154 module_param(min_links
, int, 0);
155 MODULE_PARM_DESC(min_links
, "Minimum number of available links before turning on carrier");
157 module_param(xmit_hash_policy
, charp
, 0);
158 MODULE_PARM_DESC(xmit_hash_policy
, "balance-xor and 802.3ad hashing method; "
159 "0 for layer 2 (default), 1 for layer 3+4, "
161 module_param(arp_interval
, int, 0);
162 MODULE_PARM_DESC(arp_interval
, "arp interval in milliseconds");
163 module_param_array(arp_ip_target
, charp
, NULL
, 0);
164 MODULE_PARM_DESC(arp_ip_target
, "arp targets in n.n.n.n form");
165 module_param(arp_validate
, charp
, 0);
166 MODULE_PARM_DESC(arp_validate
, "validate src/dst of ARP probes; "
167 "0 for none (default), 1 for active, "
168 "2 for backup, 3 for all");
169 module_param(fail_over_mac
, charp
, 0);
170 MODULE_PARM_DESC(fail_over_mac
, "For active-backup, do not set all slaves to "
171 "the same MAC; 0 for none (default), "
172 "1 for active, 2 for follow");
173 module_param(all_slaves_active
, int, 0);
174 MODULE_PARM_DESC(all_slaves_active
, "Keep all frames received on an interface"
175 "by setting active flag for all slaves; "
176 "0 for never (default), 1 for always.");
177 module_param(resend_igmp
, int, 0);
178 MODULE_PARM_DESC(resend_igmp
, "Number of IGMP membership reports to send on "
181 /*----------------------------- Global variables ----------------------------*/
183 #ifdef CONFIG_NET_POLL_CONTROLLER
184 atomic_t netpoll_block_tx
= ATOMIC_INIT(0);
187 int bond_net_id __read_mostly
;
189 static __be32 arp_target
[BOND_MAX_ARP_TARGETS
];
190 static int arp_ip_count
;
191 static int bond_mode
= BOND_MODE_ROUNDROBIN
;
192 static int xmit_hashtype
= BOND_XMIT_POLICY_LAYER2
;
193 static int lacp_fast
;
195 const struct bond_parm_tbl bond_lacp_tbl
[] = {
196 { "slow", AD_LACP_SLOW
},
197 { "fast", AD_LACP_FAST
},
201 const struct bond_parm_tbl bond_mode_tbl
[] = {
202 { "balance-rr", BOND_MODE_ROUNDROBIN
},
203 { "active-backup", BOND_MODE_ACTIVEBACKUP
},
204 { "balance-xor", BOND_MODE_XOR
},
205 { "broadcast", BOND_MODE_BROADCAST
},
206 { "802.3ad", BOND_MODE_8023AD
},
207 { "balance-tlb", BOND_MODE_TLB
},
208 { "balance-alb", BOND_MODE_ALB
},
212 const struct bond_parm_tbl xmit_hashtype_tbl
[] = {
213 { "layer2", BOND_XMIT_POLICY_LAYER2
},
214 { "layer3+4", BOND_XMIT_POLICY_LAYER34
},
215 { "layer2+3", BOND_XMIT_POLICY_LAYER23
},
219 const struct bond_parm_tbl arp_validate_tbl
[] = {
220 { "none", BOND_ARP_VALIDATE_NONE
},
221 { "active", BOND_ARP_VALIDATE_ACTIVE
},
222 { "backup", BOND_ARP_VALIDATE_BACKUP
},
223 { "all", BOND_ARP_VALIDATE_ALL
},
227 const struct bond_parm_tbl fail_over_mac_tbl
[] = {
228 { "none", BOND_FOM_NONE
},
229 { "active", BOND_FOM_ACTIVE
},
230 { "follow", BOND_FOM_FOLLOW
},
234 const struct bond_parm_tbl pri_reselect_tbl
[] = {
235 { "always", BOND_PRI_RESELECT_ALWAYS
},
236 { "better", BOND_PRI_RESELECT_BETTER
},
237 { "failure", BOND_PRI_RESELECT_FAILURE
},
241 struct bond_parm_tbl ad_select_tbl
[] = {
242 { "stable", BOND_AD_STABLE
},
243 { "bandwidth", BOND_AD_BANDWIDTH
},
244 { "count", BOND_AD_COUNT
},
248 /*-------------------------- Forward declarations ---------------------------*/
250 static int bond_init(struct net_device
*bond_dev
);
251 static void bond_uninit(struct net_device
*bond_dev
);
253 /*---------------------------- General routines -----------------------------*/
255 const char *bond_mode_name(int mode
)
257 static const char *names
[] = {
258 [BOND_MODE_ROUNDROBIN
] = "load balancing (round-robin)",
259 [BOND_MODE_ACTIVEBACKUP
] = "fault-tolerance (active-backup)",
260 [BOND_MODE_XOR
] = "load balancing (xor)",
261 [BOND_MODE_BROADCAST
] = "fault-tolerance (broadcast)",
262 [BOND_MODE_8023AD
] = "IEEE 802.3ad Dynamic link aggregation",
263 [BOND_MODE_TLB
] = "transmit load balancing",
264 [BOND_MODE_ALB
] = "adaptive load balancing",
267 if (mode
< 0 || mode
> BOND_MODE_ALB
)
273 /*---------------------------------- VLAN -----------------------------------*/
276 * bond_add_vlan - add a new vlan id on bond
277 * @bond: bond that got the notification
278 * @vlan_id: the vlan id to add
280 * Returns -ENOMEM if allocation failed.
282 static int bond_add_vlan(struct bonding
*bond
, unsigned short vlan_id
)
284 struct vlan_entry
*vlan
;
286 pr_debug("bond: %s, vlan id %d\n",
287 (bond
? bond
->dev
->name
: "None"), vlan_id
);
289 vlan
= kzalloc(sizeof(struct vlan_entry
), GFP_KERNEL
);
293 INIT_LIST_HEAD(&vlan
->vlan_list
);
294 vlan
->vlan_id
= vlan_id
;
296 write_lock_bh(&bond
->lock
);
298 list_add_tail(&vlan
->vlan_list
, &bond
->vlan_list
);
300 write_unlock_bh(&bond
->lock
);
302 pr_debug("added VLAN ID %d on bond %s\n", vlan_id
, bond
->dev
->name
);
308 * bond_del_vlan - delete a vlan id from bond
309 * @bond: bond that got the notification
310 * @vlan_id: the vlan id to delete
312 * returns -ENODEV if @vlan_id was not found in @bond.
314 static int bond_del_vlan(struct bonding
*bond
, unsigned short vlan_id
)
316 struct vlan_entry
*vlan
;
319 pr_debug("bond: %s, vlan id %d\n", bond
->dev
->name
, vlan_id
);
322 write_lock_bh(&bond
->lock
);
324 list_for_each_entry(vlan
, &bond
->vlan_list
, vlan_list
) {
325 if (vlan
->vlan_id
== vlan_id
) {
326 list_del(&vlan
->vlan_list
);
328 if (bond_is_lb(bond
))
329 bond_alb_clear_vlan(bond
, vlan_id
);
331 pr_debug("removed VLAN ID %d from bond %s\n",
332 vlan_id
, bond
->dev
->name
);
341 pr_debug("couldn't find VLAN ID %d in bond %s\n",
342 vlan_id
, bond
->dev
->name
);
345 write_unlock_bh(&bond
->lock
);
346 unblock_netpoll_tx();
351 * bond_next_vlan - safely skip to the next item in the vlans list.
352 * @bond: the bond we're working on
353 * @curr: item we're advancing from
355 * Returns %NULL if list is empty, bond->next_vlan if @curr is %NULL,
356 * or @curr->next otherwise (even if it is @curr itself again).
358 * Caller must hold bond->lock
360 struct vlan_entry
*bond_next_vlan(struct bonding
*bond
, struct vlan_entry
*curr
)
362 struct vlan_entry
*next
, *last
;
364 if (list_empty(&bond
->vlan_list
))
368 next
= list_entry(bond
->vlan_list
.next
,
369 struct vlan_entry
, vlan_list
);
371 last
= list_entry(bond
->vlan_list
.prev
,
372 struct vlan_entry
, vlan_list
);
374 next
= list_entry(bond
->vlan_list
.next
,
375 struct vlan_entry
, vlan_list
);
377 next
= list_entry(curr
->vlan_list
.next
,
378 struct vlan_entry
, vlan_list
);
386 * bond_dev_queue_xmit - Prepare skb for xmit.
388 * @bond: bond device that got this skb for tx.
389 * @skb: hw accel VLAN tagged skb to transmit
390 * @slave_dev: slave that is supposed to xmit this skbuff
392 int bond_dev_queue_xmit(struct bonding
*bond
, struct sk_buff
*skb
,
393 struct net_device
*slave_dev
)
395 skb
->dev
= slave_dev
;
397 BUILD_BUG_ON(sizeof(skb
->queue_mapping
) !=
398 sizeof(qdisc_skb_cb(skb
)->slave_dev_queue_mapping
));
399 skb
->queue_mapping
= qdisc_skb_cb(skb
)->slave_dev_queue_mapping
;
401 if (unlikely(netpoll_tx_running(bond
->dev
)))
402 bond_netpoll_send_skb(bond_get_slave_by_dev(bond
, slave_dev
), skb
);
410 * In the following 2 functions, bond_vlan_rx_add_vid and bond_vlan_rx_kill_vid,
411 * We don't protect the slave list iteration with a lock because:
412 * a. This operation is performed in IOCTL context,
413 * b. The operation is protected by the RTNL semaphore in the 8021q code,
414 * c. Holding a lock with BH disabled while directly calling a base driver
415 * entry point is generally a BAD idea.
417 * The design of synchronization/protection for this operation in the 8021q
418 * module is good for one or more VLAN devices over a single physical device
419 * and cannot be extended for a teaming solution like bonding, so there is a
420 * potential race condition here where a net device from the vlan group might
421 * be referenced (either by a base driver or the 8021q code) while it is being
422 * removed from the system. However, it turns out we're not making matters
423 * worse, and if it works for regular VLAN usage it will work here too.
427 * bond_vlan_rx_add_vid - Propagates adding an id to slaves
428 * @bond_dev: bonding net device that got called
429 * @vid: vlan id being added
431 static int bond_vlan_rx_add_vid(struct net_device
*bond_dev
, uint16_t vid
)
433 struct bonding
*bond
= netdev_priv(bond_dev
);
434 struct slave
*slave
, *stop_at
;
437 bond_for_each_slave(bond
, slave
, i
) {
438 res
= vlan_vid_add(slave
->dev
, vid
);
443 res
= bond_add_vlan(bond
, vid
);
445 pr_err("%s: Error: Failed to add vlan id %d\n",
446 bond_dev
->name
, vid
);
453 /* unwind from head to the slave that failed */
455 bond_for_each_slave_from_to(bond
, slave
, i
, bond
->first_slave
, stop_at
)
456 vlan_vid_del(slave
->dev
, vid
);
462 * bond_vlan_rx_kill_vid - Propagates deleting an id to slaves
463 * @bond_dev: bonding net device that got called
464 * @vid: vlan id being removed
466 static int bond_vlan_rx_kill_vid(struct net_device
*bond_dev
, uint16_t vid
)
468 struct bonding
*bond
= netdev_priv(bond_dev
);
472 bond_for_each_slave(bond
, slave
, i
)
473 vlan_vid_del(slave
->dev
, vid
);
475 res
= bond_del_vlan(bond
, vid
);
477 pr_err("%s: Error: Failed to remove vlan id %d\n",
478 bond_dev
->name
, vid
);
485 static void bond_add_vlans_on_slave(struct bonding
*bond
, struct net_device
*slave_dev
)
487 struct vlan_entry
*vlan
;
490 list_for_each_entry(vlan
, &bond
->vlan_list
, vlan_list
) {
491 res
= vlan_vid_add(slave_dev
, vlan
->vlan_id
);
493 pr_warning("%s: Failed to add vlan id %d to device %s\n",
494 bond
->dev
->name
, vlan
->vlan_id
,
499 static void bond_del_vlans_from_slave(struct bonding
*bond
,
500 struct net_device
*slave_dev
)
502 struct vlan_entry
*vlan
;
504 list_for_each_entry(vlan
, &bond
->vlan_list
, vlan_list
) {
507 vlan_vid_del(slave_dev
, vlan
->vlan_id
);
511 /*------------------------------- Link status -------------------------------*/
514 * Set the carrier state for the master according to the state of its
515 * slaves. If any slaves are up, the master is up. In 802.3ad mode,
516 * do special 802.3ad magic.
518 * Returns zero if carrier state does not change, nonzero if it does.
520 static int bond_set_carrier(struct bonding
*bond
)
525 if (bond
->slave_cnt
== 0)
528 if (bond
->params
.mode
== BOND_MODE_8023AD
)
529 return bond_3ad_set_carrier(bond
);
531 bond_for_each_slave(bond
, slave
, i
) {
532 if (slave
->link
== BOND_LINK_UP
) {
533 if (!netif_carrier_ok(bond
->dev
)) {
534 netif_carrier_on(bond
->dev
);
542 if (netif_carrier_ok(bond
->dev
)) {
543 netif_carrier_off(bond
->dev
);
550 * Get link speed and duplex from the slave's base driver
551 * using ethtool. If for some reason the call fails or the
552 * values are invalid, set speed and duplex to -1,
555 static void bond_update_speed_duplex(struct slave
*slave
)
557 struct net_device
*slave_dev
= slave
->dev
;
558 struct ethtool_cmd ecmd
;
562 slave
->speed
= SPEED_UNKNOWN
;
563 slave
->duplex
= DUPLEX_UNKNOWN
;
565 res
= __ethtool_get_settings(slave_dev
, &ecmd
);
569 slave_speed
= ethtool_cmd_speed(&ecmd
);
570 if (slave_speed
== 0 || slave_speed
== ((__u32
) -1))
573 switch (ecmd
.duplex
) {
581 slave
->speed
= slave_speed
;
582 slave
->duplex
= ecmd
.duplex
;
588 * if <dev> supports MII link status reporting, check its link status.
590 * We either do MII/ETHTOOL ioctls, or check netif_carrier_ok(),
591 * depending upon the setting of the use_carrier parameter.
593 * Return either BMSR_LSTATUS, meaning that the link is up (or we
594 * can't tell and just pretend it is), or 0, meaning that the link is
597 * If reporting is non-zero, instead of faking link up, return -1 if
598 * both ETHTOOL and MII ioctls fail (meaning the device does not
599 * support them). If use_carrier is set, return whatever it says.
600 * It'd be nice if there was a good way to tell if a driver supports
601 * netif_carrier, but there really isn't.
603 static int bond_check_dev_link(struct bonding
*bond
,
604 struct net_device
*slave_dev
, int reporting
)
606 const struct net_device_ops
*slave_ops
= slave_dev
->netdev_ops
;
607 int (*ioctl
)(struct net_device
*, struct ifreq
*, int);
609 struct mii_ioctl_data
*mii
;
611 if (!reporting
&& !netif_running(slave_dev
))
614 if (bond
->params
.use_carrier
)
615 return netif_carrier_ok(slave_dev
) ? BMSR_LSTATUS
: 0;
617 /* Try to get link status using Ethtool first. */
618 if (slave_dev
->ethtool_ops
) {
619 if (slave_dev
->ethtool_ops
->get_link
) {
622 link
= slave_dev
->ethtool_ops
->get_link(slave_dev
);
624 return link
? BMSR_LSTATUS
: 0;
628 /* Ethtool can't be used, fallback to MII ioctls. */
629 ioctl
= slave_ops
->ndo_do_ioctl
;
631 /* TODO: set pointer to correct ioctl on a per team member */
632 /* bases to make this more efficient. that is, once */
633 /* we determine the correct ioctl, we will always */
634 /* call it and not the others for that team */
638 * We cannot assume that SIOCGMIIPHY will also read a
639 * register; not all network drivers (e.g., e100)
643 /* Yes, the mii is overlaid on the ifreq.ifr_ifru */
644 strncpy(ifr
.ifr_name
, slave_dev
->name
, IFNAMSIZ
);
646 if (IOCTL(slave_dev
, &ifr
, SIOCGMIIPHY
) == 0) {
647 mii
->reg_num
= MII_BMSR
;
648 if (IOCTL(slave_dev
, &ifr
, SIOCGMIIREG
) == 0)
649 return mii
->val_out
& BMSR_LSTATUS
;
654 * If reporting, report that either there's no dev->do_ioctl,
655 * or both SIOCGMIIREG and get_link failed (meaning that we
656 * cannot report link status). If not reporting, pretend
659 return reporting
? -1 : BMSR_LSTATUS
;
662 /*----------------------------- Multicast list ------------------------------*/
665 * Push the promiscuity flag down to appropriate slaves
667 static int bond_set_promiscuity(struct bonding
*bond
, int inc
)
670 if (USES_PRIMARY(bond
->params
.mode
)) {
671 /* write lock already acquired */
672 if (bond
->curr_active_slave
) {
673 err
= dev_set_promiscuity(bond
->curr_active_slave
->dev
,
679 bond_for_each_slave(bond
, slave
, i
) {
680 err
= dev_set_promiscuity(slave
->dev
, inc
);
689 * Push the allmulti flag down to all slaves
691 static int bond_set_allmulti(struct bonding
*bond
, int inc
)
694 if (USES_PRIMARY(bond
->params
.mode
)) {
695 /* write lock already acquired */
696 if (bond
->curr_active_slave
) {
697 err
= dev_set_allmulti(bond
->curr_active_slave
->dev
,
703 bond_for_each_slave(bond
, slave
, i
) {
704 err
= dev_set_allmulti(slave
->dev
, inc
);
713 * Add a Multicast address to slaves
716 static void bond_mc_add(struct bonding
*bond
, void *addr
)
718 if (USES_PRIMARY(bond
->params
.mode
)) {
719 /* write lock already acquired */
720 if (bond
->curr_active_slave
)
721 dev_mc_add(bond
->curr_active_slave
->dev
, addr
);
726 bond_for_each_slave(bond
, slave
, i
)
727 dev_mc_add(slave
->dev
, addr
);
732 * Remove a multicast address from slave
735 static void bond_mc_del(struct bonding
*bond
, void *addr
)
737 if (USES_PRIMARY(bond
->params
.mode
)) {
738 /* write lock already acquired */
739 if (bond
->curr_active_slave
)
740 dev_mc_del(bond
->curr_active_slave
->dev
, addr
);
744 bond_for_each_slave(bond
, slave
, i
) {
745 dev_mc_del(slave
->dev
, addr
);
751 static void __bond_resend_igmp_join_requests(struct net_device
*dev
)
753 struct in_device
*in_dev
;
756 in_dev
= __in_dev_get_rcu(dev
);
758 ip_mc_rejoin_groups(in_dev
);
763 * Retrieve the list of registered multicast addresses for the bonding
764 * device and retransmit an IGMP JOIN request to the current active
767 static void bond_resend_igmp_join_requests(struct bonding
*bond
)
769 struct net_device
*bond_dev
, *vlan_dev
, *master_dev
;
770 struct vlan_entry
*vlan
;
772 read_lock(&bond
->lock
);
774 bond_dev
= bond
->dev
;
776 /* rejoin all groups on bond device */
777 __bond_resend_igmp_join_requests(bond_dev
);
780 * if bond is enslaved to a bridge,
781 * then rejoin all groups on its master
783 master_dev
= bond_dev
->master
;
785 if ((master_dev
->priv_flags
& IFF_EBRIDGE
)
786 && (bond_dev
->priv_flags
& IFF_BRIDGE_PORT
))
787 __bond_resend_igmp_join_requests(master_dev
);
789 /* rejoin all groups on vlan devices */
790 list_for_each_entry(vlan
, &bond
->vlan_list
, vlan_list
) {
792 vlan_dev
= __vlan_find_dev_deep(bond_dev
,
796 __bond_resend_igmp_join_requests(vlan_dev
);
799 if (--bond
->igmp_retrans
> 0)
800 queue_delayed_work(bond
->wq
, &bond
->mcast_work
, HZ
/5);
802 read_unlock(&bond
->lock
);
805 static void bond_resend_igmp_join_requests_delayed(struct work_struct
*work
)
807 struct bonding
*bond
= container_of(work
, struct bonding
,
809 bond_resend_igmp_join_requests(bond
);
813 * flush all members of flush->mc_list from device dev->mc_list
815 static void bond_mc_list_flush(struct net_device
*bond_dev
,
816 struct net_device
*slave_dev
)
818 struct bonding
*bond
= netdev_priv(bond_dev
);
819 struct netdev_hw_addr
*ha
;
821 netdev_for_each_mc_addr(ha
, bond_dev
)
822 dev_mc_del(slave_dev
, ha
->addr
);
824 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
825 /* del lacpdu mc addr from mc list */
826 u8 lacpdu_multicast
[ETH_ALEN
] = MULTICAST_LACPDU_ADDR
;
828 dev_mc_del(slave_dev
, lacpdu_multicast
);
832 /*--------------------------- Active slave change ---------------------------*/
835 * Update the mc list and multicast-related flags for the new and
836 * old active slaves (if any) according to the multicast mode, and
837 * promiscuous flags unconditionally.
839 static void bond_mc_swap(struct bonding
*bond
, struct slave
*new_active
,
840 struct slave
*old_active
)
842 struct netdev_hw_addr
*ha
;
844 if (!USES_PRIMARY(bond
->params
.mode
))
845 /* nothing to do - mc list is already up-to-date on
851 if (bond
->dev
->flags
& IFF_PROMISC
)
852 dev_set_promiscuity(old_active
->dev
, -1);
854 if (bond
->dev
->flags
& IFF_ALLMULTI
)
855 dev_set_allmulti(old_active
->dev
, -1);
857 netdev_for_each_mc_addr(ha
, bond
->dev
)
858 dev_mc_del(old_active
->dev
, ha
->addr
);
862 /* FIXME: Signal errors upstream. */
863 if (bond
->dev
->flags
& IFF_PROMISC
)
864 dev_set_promiscuity(new_active
->dev
, 1);
866 if (bond
->dev
->flags
& IFF_ALLMULTI
)
867 dev_set_allmulti(new_active
->dev
, 1);
869 netdev_for_each_mc_addr(ha
, bond
->dev
)
870 dev_mc_add(new_active
->dev
, ha
->addr
);
875 * bond_do_fail_over_mac
877 * Perform special MAC address swapping for fail_over_mac settings
879 * Called with RTNL, bond->lock for read, curr_slave_lock for write_bh.
881 static void bond_do_fail_over_mac(struct bonding
*bond
,
882 struct slave
*new_active
,
883 struct slave
*old_active
)
884 __releases(&bond
->curr_slave_lock
)
885 __releases(&bond
->lock
)
886 __acquires(&bond
->lock
)
887 __acquires(&bond
->curr_slave_lock
)
889 u8 tmp_mac
[ETH_ALEN
];
890 struct sockaddr saddr
;
893 switch (bond
->params
.fail_over_mac
) {
894 case BOND_FOM_ACTIVE
:
896 memcpy(bond
->dev
->dev_addr
, new_active
->dev
->dev_addr
,
897 new_active
->dev
->addr_len
);
898 write_unlock_bh(&bond
->curr_slave_lock
);
899 read_unlock(&bond
->lock
);
900 call_netdevice_notifiers(NETDEV_CHANGEADDR
, bond
->dev
);
901 read_lock(&bond
->lock
);
902 write_lock_bh(&bond
->curr_slave_lock
);
905 case BOND_FOM_FOLLOW
:
907 * if new_active && old_active, swap them
908 * if just old_active, do nothing (going to no active slave)
909 * if just new_active, set new_active to bond's MAC
914 write_unlock_bh(&bond
->curr_slave_lock
);
915 read_unlock(&bond
->lock
);
918 memcpy(tmp_mac
, new_active
->dev
->dev_addr
, ETH_ALEN
);
919 memcpy(saddr
.sa_data
, old_active
->dev
->dev_addr
,
921 saddr
.sa_family
= new_active
->dev
->type
;
923 memcpy(saddr
.sa_data
, bond
->dev
->dev_addr
, ETH_ALEN
);
924 saddr
.sa_family
= bond
->dev
->type
;
927 rv
= dev_set_mac_address(new_active
->dev
, &saddr
);
929 pr_err("%s: Error %d setting MAC of slave %s\n",
930 bond
->dev
->name
, -rv
, new_active
->dev
->name
);
937 memcpy(saddr
.sa_data
, tmp_mac
, ETH_ALEN
);
938 saddr
.sa_family
= old_active
->dev
->type
;
940 rv
= dev_set_mac_address(old_active
->dev
, &saddr
);
942 pr_err("%s: Error %d setting MAC of slave %s\n",
943 bond
->dev
->name
, -rv
, new_active
->dev
->name
);
945 read_lock(&bond
->lock
);
946 write_lock_bh(&bond
->curr_slave_lock
);
949 pr_err("%s: bond_do_fail_over_mac impossible: bad policy %d\n",
950 bond
->dev
->name
, bond
->params
.fail_over_mac
);
956 static bool bond_should_change_active(struct bonding
*bond
)
958 struct slave
*prim
= bond
->primary_slave
;
959 struct slave
*curr
= bond
->curr_active_slave
;
961 if (!prim
|| !curr
|| curr
->link
!= BOND_LINK_UP
)
963 if (bond
->force_primary
) {
964 bond
->force_primary
= false;
967 if (bond
->params
.primary_reselect
== BOND_PRI_RESELECT_BETTER
&&
968 (prim
->speed
< curr
->speed
||
969 (prim
->speed
== curr
->speed
&& prim
->duplex
<= curr
->duplex
)))
971 if (bond
->params
.primary_reselect
== BOND_PRI_RESELECT_FAILURE
)
977 * find_best_interface - select the best available slave to be the active one
978 * @bond: our bonding struct
980 * Warning: Caller must hold curr_slave_lock for writing.
982 static struct slave
*bond_find_best_slave(struct bonding
*bond
)
984 struct slave
*new_active
, *old_active
;
985 struct slave
*bestslave
= NULL
;
986 int mintime
= bond
->params
.updelay
;
989 new_active
= bond
->curr_active_slave
;
991 if (!new_active
) { /* there were no active slaves left */
992 if (bond
->slave_cnt
> 0) /* found one slave */
993 new_active
= bond
->first_slave
;
995 return NULL
; /* still no slave, return NULL */
998 if ((bond
->primary_slave
) &&
999 bond
->primary_slave
->link
== BOND_LINK_UP
&&
1000 bond_should_change_active(bond
)) {
1001 new_active
= bond
->primary_slave
;
1004 /* remember where to stop iterating over the slaves */
1005 old_active
= new_active
;
1007 bond_for_each_slave_from(bond
, new_active
, i
, old_active
) {
1008 if (new_active
->link
== BOND_LINK_UP
) {
1010 } else if (new_active
->link
== BOND_LINK_BACK
&&
1011 IS_UP(new_active
->dev
)) {
1012 /* link up, but waiting for stabilization */
1013 if (new_active
->delay
< mintime
) {
1014 mintime
= new_active
->delay
;
1015 bestslave
= new_active
;
1023 static bool bond_should_notify_peers(struct bonding
*bond
)
1025 struct slave
*slave
= bond
->curr_active_slave
;
1027 pr_debug("bond_should_notify_peers: bond %s slave %s\n",
1028 bond
->dev
->name
, slave
? slave
->dev
->name
: "NULL");
1030 if (!slave
|| !bond
->send_peer_notif
||
1031 test_bit(__LINK_STATE_LINKWATCH_PENDING
, &slave
->dev
->state
))
1034 bond
->send_peer_notif
--;
1039 * change_active_interface - change the active slave into the specified one
1040 * @bond: our bonding struct
1041 * @new: the new slave to make the active one
1043 * Set the new slave to the bond's settings and unset them on the old
1044 * curr_active_slave.
1045 * Setting include flags, mc-list, promiscuity, allmulti, etc.
1047 * If @new's link state is %BOND_LINK_BACK we'll set it to %BOND_LINK_UP,
1048 * because it is apparently the best available slave we have, even though its
1049 * updelay hasn't timed out yet.
1051 * If new_active is not NULL, caller must hold bond->lock for read and
1052 * curr_slave_lock for write_bh.
1054 void bond_change_active_slave(struct bonding
*bond
, struct slave
*new_active
)
1056 struct slave
*old_active
= bond
->curr_active_slave
;
1058 if (old_active
== new_active
)
1062 new_active
->jiffies
= jiffies
;
1064 if (new_active
->link
== BOND_LINK_BACK
) {
1065 if (USES_PRIMARY(bond
->params
.mode
)) {
1066 pr_info("%s: making interface %s the new active one %d ms earlier.\n",
1067 bond
->dev
->name
, new_active
->dev
->name
,
1068 (bond
->params
.updelay
- new_active
->delay
) * bond
->params
.miimon
);
1071 new_active
->delay
= 0;
1072 new_active
->link
= BOND_LINK_UP
;
1074 if (bond
->params
.mode
== BOND_MODE_8023AD
)
1075 bond_3ad_handle_link_change(new_active
, BOND_LINK_UP
);
1077 if (bond_is_lb(bond
))
1078 bond_alb_handle_link_change(bond
, new_active
, BOND_LINK_UP
);
1080 if (USES_PRIMARY(bond
->params
.mode
)) {
1081 pr_info("%s: making interface %s the new active one.\n",
1082 bond
->dev
->name
, new_active
->dev
->name
);
1087 if (USES_PRIMARY(bond
->params
.mode
))
1088 bond_mc_swap(bond
, new_active
, old_active
);
1090 if (bond_is_lb(bond
)) {
1091 bond_alb_handle_active_change(bond
, new_active
);
1093 bond_set_slave_inactive_flags(old_active
);
1095 bond_set_slave_active_flags(new_active
);
1097 bond
->curr_active_slave
= new_active
;
1100 if (bond
->params
.mode
== BOND_MODE_ACTIVEBACKUP
) {
1102 bond_set_slave_inactive_flags(old_active
);
1105 bool should_notify_peers
= false;
1107 bond_set_slave_active_flags(new_active
);
1109 if (bond
->params
.fail_over_mac
)
1110 bond_do_fail_over_mac(bond
, new_active
,
1113 if (netif_running(bond
->dev
)) {
1114 bond
->send_peer_notif
=
1115 bond
->params
.num_peer_notif
;
1116 should_notify_peers
=
1117 bond_should_notify_peers(bond
);
1120 write_unlock_bh(&bond
->curr_slave_lock
);
1121 read_unlock(&bond
->lock
);
1123 call_netdevice_notifiers(NETDEV_BONDING_FAILOVER
, bond
->dev
);
1124 if (should_notify_peers
)
1125 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS
,
1128 read_lock(&bond
->lock
);
1129 write_lock_bh(&bond
->curr_slave_lock
);
1133 /* resend IGMP joins since active slave has changed or
1134 * all were sent on curr_active_slave.
1135 * resend only if bond is brought up with the affected
1136 * bonding modes and the retransmission is enabled */
1137 if (netif_running(bond
->dev
) && (bond
->params
.resend_igmp
> 0) &&
1138 ((USES_PRIMARY(bond
->params
.mode
) && new_active
) ||
1139 bond
->params
.mode
== BOND_MODE_ROUNDROBIN
)) {
1140 bond
->igmp_retrans
= bond
->params
.resend_igmp
;
1141 queue_delayed_work(bond
->wq
, &bond
->mcast_work
, 0);
1146 * bond_select_active_slave - select a new active slave, if needed
1147 * @bond: our bonding struct
1149 * This functions should be called when one of the following occurs:
1150 * - The old curr_active_slave has been released or lost its link.
1151 * - The primary_slave has got its link back.
1152 * - A slave has got its link back and there's no old curr_active_slave.
1154 * Caller must hold bond->lock for read and curr_slave_lock for write_bh.
1156 void bond_select_active_slave(struct bonding
*bond
)
1158 struct slave
*best_slave
;
1161 best_slave
= bond_find_best_slave(bond
);
1162 if (best_slave
!= bond
->curr_active_slave
) {
1163 bond_change_active_slave(bond
, best_slave
);
1164 rv
= bond_set_carrier(bond
);
1168 if (netif_carrier_ok(bond
->dev
)) {
1169 pr_info("%s: first active interface up!\n",
1172 pr_info("%s: now running without any active interface !\n",
1178 /*--------------------------- slave list handling ---------------------------*/
1181 * This function attaches the slave to the end of list.
1183 * bond->lock held for writing by caller.
1185 static void bond_attach_slave(struct bonding
*bond
, struct slave
*new_slave
)
1187 if (bond
->first_slave
== NULL
) { /* attaching the first slave */
1188 new_slave
->next
= new_slave
;
1189 new_slave
->prev
= new_slave
;
1190 bond
->first_slave
= new_slave
;
1192 new_slave
->next
= bond
->first_slave
;
1193 new_slave
->prev
= bond
->first_slave
->prev
;
1194 new_slave
->next
->prev
= new_slave
;
1195 new_slave
->prev
->next
= new_slave
;
1202 * This function detaches the slave from the list.
1203 * WARNING: no check is made to verify if the slave effectively
1204 * belongs to <bond>.
1205 * Nothing is freed on return, structures are just unchained.
1206 * If any slave pointer in bond was pointing to <slave>,
1207 * it should be changed by the calling function.
1209 * bond->lock held for writing by caller.
1211 static void bond_detach_slave(struct bonding
*bond
, struct slave
*slave
)
1214 slave
->next
->prev
= slave
->prev
;
1217 slave
->prev
->next
= slave
->next
;
1219 if (bond
->first_slave
== slave
) { /* slave is the first slave */
1220 if (bond
->slave_cnt
> 1) { /* there are more slave */
1221 bond
->first_slave
= slave
->next
;
1223 bond
->first_slave
= NULL
; /* slave was the last one */
1232 #ifdef CONFIG_NET_POLL_CONTROLLER
1233 static inline int slave_enable_netpoll(struct slave
*slave
)
1238 np
= kzalloc(sizeof(*np
), GFP_ATOMIC
);
1243 err
= __netpoll_setup(np
, slave
->dev
, GFP_ATOMIC
);
1252 static inline void slave_disable_netpoll(struct slave
*slave
)
1254 struct netpoll
*np
= slave
->np
;
1260 __netpoll_free_rcu(np
);
1262 static inline bool slave_dev_support_netpoll(struct net_device
*slave_dev
)
1264 if (slave_dev
->priv_flags
& IFF_DISABLE_NETPOLL
)
1266 if (!slave_dev
->netdev_ops
->ndo_poll_controller
)
1271 static void bond_poll_controller(struct net_device
*bond_dev
)
1275 static void __bond_netpoll_cleanup(struct bonding
*bond
)
1277 struct slave
*slave
;
1280 bond_for_each_slave(bond
, slave
, i
)
1281 if (IS_UP(slave
->dev
))
1282 slave_disable_netpoll(slave
);
1284 static void bond_netpoll_cleanup(struct net_device
*bond_dev
)
1286 struct bonding
*bond
= netdev_priv(bond_dev
);
1288 read_lock(&bond
->lock
);
1289 __bond_netpoll_cleanup(bond
);
1290 read_unlock(&bond
->lock
);
1293 static int bond_netpoll_setup(struct net_device
*dev
, struct netpoll_info
*ni
, gfp_t gfp
)
1295 struct bonding
*bond
= netdev_priv(dev
);
1296 struct slave
*slave
;
1299 read_lock(&bond
->lock
);
1300 bond_for_each_slave(bond
, slave
, i
) {
1301 err
= slave_enable_netpoll(slave
);
1303 __bond_netpoll_cleanup(bond
);
1307 read_unlock(&bond
->lock
);
1311 static struct netpoll_info
*bond_netpoll_info(struct bonding
*bond
)
1313 return bond
->dev
->npinfo
;
1317 static inline int slave_enable_netpoll(struct slave
*slave
)
1321 static inline void slave_disable_netpoll(struct slave
*slave
)
1324 static void bond_netpoll_cleanup(struct net_device
*bond_dev
)
1329 /*---------------------------------- IOCTL ----------------------------------*/
1331 static int bond_sethwaddr(struct net_device
*bond_dev
,
1332 struct net_device
*slave_dev
)
1334 pr_debug("bond_dev=%p\n", bond_dev
);
1335 pr_debug("slave_dev=%p\n", slave_dev
);
1336 pr_debug("slave_dev->addr_len=%d\n", slave_dev
->addr_len
);
1337 memcpy(bond_dev
->dev_addr
, slave_dev
->dev_addr
, slave_dev
->addr_len
);
1341 static netdev_features_t
bond_fix_features(struct net_device
*dev
,
1342 netdev_features_t features
)
1344 struct slave
*slave
;
1345 struct bonding
*bond
= netdev_priv(dev
);
1346 netdev_features_t mask
;
1349 read_lock(&bond
->lock
);
1351 if (!bond
->first_slave
) {
1352 /* Disable adding VLANs to empty bond. But why? --mq */
1353 features
|= NETIF_F_VLAN_CHALLENGED
;
1358 features
&= ~NETIF_F_ONE_FOR_ALL
;
1359 features
|= NETIF_F_ALL_FOR_ALL
;
1361 bond_for_each_slave(bond
, slave
, i
) {
1362 features
= netdev_increment_features(features
,
1363 slave
->dev
->features
,
1368 read_unlock(&bond
->lock
);
1372 #define BOND_VLAN_FEATURES (NETIF_F_ALL_CSUM | NETIF_F_SG | \
1373 NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
1374 NETIF_F_HIGHDMA | NETIF_F_LRO)
1376 static void bond_compute_features(struct bonding
*bond
)
1378 struct slave
*slave
;
1379 struct net_device
*bond_dev
= bond
->dev
;
1380 netdev_features_t vlan_features
= BOND_VLAN_FEATURES
;
1381 unsigned short max_hard_header_len
= ETH_HLEN
;
1382 unsigned int gso_max_size
= GSO_MAX_SIZE
;
1383 u16 gso_max_segs
= GSO_MAX_SEGS
;
1385 unsigned int flags
, dst_release_flag
= IFF_XMIT_DST_RELEASE
;
1387 read_lock(&bond
->lock
);
1389 if (!bond
->first_slave
)
1392 bond_for_each_slave(bond
, slave
, i
) {
1393 vlan_features
= netdev_increment_features(vlan_features
,
1394 slave
->dev
->vlan_features
, BOND_VLAN_FEATURES
);
1396 dst_release_flag
&= slave
->dev
->priv_flags
;
1397 if (slave
->dev
->hard_header_len
> max_hard_header_len
)
1398 max_hard_header_len
= slave
->dev
->hard_header_len
;
1400 gso_max_size
= min(gso_max_size
, slave
->dev
->gso_max_size
);
1401 gso_max_segs
= min(gso_max_segs
, slave
->dev
->gso_max_segs
);
1405 bond_dev
->vlan_features
= vlan_features
;
1406 bond_dev
->hard_header_len
= max_hard_header_len
;
1407 bond_dev
->gso_max_segs
= gso_max_segs
;
1408 netif_set_gso_max_size(bond_dev
, gso_max_size
);
1410 flags
= bond_dev
->priv_flags
& ~IFF_XMIT_DST_RELEASE
;
1411 bond_dev
->priv_flags
= flags
| dst_release_flag
;
1413 read_unlock(&bond
->lock
);
1415 netdev_change_features(bond_dev
);
1418 static void bond_setup_by_slave(struct net_device
*bond_dev
,
1419 struct net_device
*slave_dev
)
1421 struct bonding
*bond
= netdev_priv(bond_dev
);
1423 bond_dev
->header_ops
= slave_dev
->header_ops
;
1425 bond_dev
->type
= slave_dev
->type
;
1426 bond_dev
->hard_header_len
= slave_dev
->hard_header_len
;
1427 bond_dev
->addr_len
= slave_dev
->addr_len
;
1429 memcpy(bond_dev
->broadcast
, slave_dev
->broadcast
,
1430 slave_dev
->addr_len
);
1431 bond
->setup_by_slave
= 1;
1434 /* On bonding slaves other than the currently active slave, suppress
1435 * duplicates except for alb non-mcast/bcast.
1437 static bool bond_should_deliver_exact_match(struct sk_buff
*skb
,
1438 struct slave
*slave
,
1439 struct bonding
*bond
)
1441 if (bond_is_slave_inactive(slave
)) {
1442 if (bond
->params
.mode
== BOND_MODE_ALB
&&
1443 skb
->pkt_type
!= PACKET_BROADCAST
&&
1444 skb
->pkt_type
!= PACKET_MULTICAST
)
1451 static rx_handler_result_t
bond_handle_frame(struct sk_buff
**pskb
)
1453 struct sk_buff
*skb
= *pskb
;
1454 struct slave
*slave
;
1455 struct bonding
*bond
;
1456 int (*recv_probe
)(const struct sk_buff
*, struct bonding
*,
1458 int ret
= RX_HANDLER_ANOTHER
;
1460 skb
= skb_share_check(skb
, GFP_ATOMIC
);
1462 return RX_HANDLER_CONSUMED
;
1466 slave
= bond_slave_get_rcu(skb
->dev
);
1469 if (bond
->params
.arp_interval
)
1470 slave
->dev
->last_rx
= jiffies
;
1472 recv_probe
= ACCESS_ONCE(bond
->recv_probe
);
1474 ret
= recv_probe(skb
, bond
, slave
);
1475 if (ret
== RX_HANDLER_CONSUMED
) {
1481 if (bond_should_deliver_exact_match(skb
, slave
, bond
)) {
1482 return RX_HANDLER_EXACT
;
1485 skb
->dev
= bond
->dev
;
1487 if (bond
->params
.mode
== BOND_MODE_ALB
&&
1488 bond
->dev
->priv_flags
& IFF_BRIDGE_PORT
&&
1489 skb
->pkt_type
== PACKET_HOST
) {
1491 if (unlikely(skb_cow_head(skb
,
1492 skb
->data
- skb_mac_header(skb
)))) {
1494 return RX_HANDLER_CONSUMED
;
1496 memcpy(eth_hdr(skb
)->h_dest
, bond
->dev
->dev_addr
, ETH_ALEN
);
1502 /* enslave device <slave> to bond device <master> */
1503 int bond_enslave(struct net_device
*bond_dev
, struct net_device
*slave_dev
)
1505 struct bonding
*bond
= netdev_priv(bond_dev
);
1506 const struct net_device_ops
*slave_ops
= slave_dev
->netdev_ops
;
1507 struct slave
*new_slave
= NULL
;
1508 struct netdev_hw_addr
*ha
;
1509 struct sockaddr addr
;
1513 if (!bond
->params
.use_carrier
&& slave_dev
->ethtool_ops
== NULL
&&
1514 slave_ops
->ndo_do_ioctl
== NULL
) {
1515 pr_warning("%s: Warning: no link monitoring support for %s\n",
1516 bond_dev
->name
, slave_dev
->name
);
1519 /* already enslaved */
1520 if (slave_dev
->flags
& IFF_SLAVE
) {
1521 pr_debug("Error, Device was already enslaved\n");
1525 /* vlan challenged mutual exclusion */
1526 /* no need to lock since we're protected by rtnl_lock */
1527 if (slave_dev
->features
& NETIF_F_VLAN_CHALLENGED
) {
1528 pr_debug("%s: NETIF_F_VLAN_CHALLENGED\n", slave_dev
->name
);
1529 if (vlan_uses_dev(bond_dev
)) {
1530 pr_err("%s: Error: cannot enslave VLAN challenged slave %s on VLAN enabled bond %s\n",
1531 bond_dev
->name
, slave_dev
->name
, bond_dev
->name
);
1534 pr_warning("%s: Warning: enslaved VLAN challenged slave %s. Adding VLANs will be blocked as long as %s is part of bond %s\n",
1535 bond_dev
->name
, slave_dev
->name
,
1536 slave_dev
->name
, bond_dev
->name
);
1539 pr_debug("%s: ! NETIF_F_VLAN_CHALLENGED\n", slave_dev
->name
);
1543 * Old ifenslave binaries are no longer supported. These can
1544 * be identified with moderate accuracy by the state of the slave:
1545 * the current ifenslave will set the interface down prior to
1546 * enslaving it; the old ifenslave will not.
1548 if ((slave_dev
->flags
& IFF_UP
)) {
1549 pr_err("%s is up. This may be due to an out of date ifenslave.\n",
1552 goto err_undo_flags
;
1555 /* set bonding device ether type by slave - bonding netdevices are
1556 * created with ether_setup, so when the slave type is not ARPHRD_ETHER
1557 * there is a need to override some of the type dependent attribs/funcs.
1559 * bond ether type mutual exclusion - don't allow slaves of dissimilar
1560 * ether type (eg ARPHRD_ETHER and ARPHRD_INFINIBAND) share the same bond
1562 if (bond
->slave_cnt
== 0) {
1563 if (bond_dev
->type
!= slave_dev
->type
) {
1564 pr_debug("%s: change device type from %d to %d\n",
1566 bond_dev
->type
, slave_dev
->type
);
1568 res
= call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE
,
1570 res
= notifier_to_errno(res
);
1572 pr_err("%s: refused to change device type\n",
1575 goto err_undo_flags
;
1578 /* Flush unicast and multicast addresses */
1579 dev_uc_flush(bond_dev
);
1580 dev_mc_flush(bond_dev
);
1582 if (slave_dev
->type
!= ARPHRD_ETHER
)
1583 bond_setup_by_slave(bond_dev
, slave_dev
);
1585 ether_setup(bond_dev
);
1586 bond_dev
->priv_flags
&= ~IFF_TX_SKB_SHARING
;
1589 call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE
,
1592 } else if (bond_dev
->type
!= slave_dev
->type
) {
1593 pr_err("%s ether type (%d) is different from other slaves (%d), can not enslave it.\n",
1595 slave_dev
->type
, bond_dev
->type
);
1597 goto err_undo_flags
;
1600 if (slave_ops
->ndo_set_mac_address
== NULL
) {
1601 if (bond
->slave_cnt
== 0) {
1602 pr_warning("%s: Warning: The first slave device specified does not support setting the MAC address. Setting fail_over_mac to active.",
1604 bond
->params
.fail_over_mac
= BOND_FOM_ACTIVE
;
1605 } else if (bond
->params
.fail_over_mac
!= BOND_FOM_ACTIVE
) {
1606 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",
1609 goto err_undo_flags
;
1613 call_netdevice_notifiers(NETDEV_JOIN
, slave_dev
);
1615 /* If this is the first slave, then we need to set the master's hardware
1616 * address to be the same as the slave's. */
1617 if (is_zero_ether_addr(bond
->dev
->dev_addr
))
1618 memcpy(bond
->dev
->dev_addr
, slave_dev
->dev_addr
,
1619 slave_dev
->addr_len
);
1622 new_slave
= kzalloc(sizeof(struct slave
), GFP_KERNEL
);
1625 goto err_undo_flags
;
1629 * Set the new_slave's queue_id to be zero. Queue ID mapping
1630 * is set via sysfs or module option if desired.
1632 new_slave
->queue_id
= 0;
1634 /* Save slave's original mtu and then set it to match the bond */
1635 new_slave
->original_mtu
= slave_dev
->mtu
;
1636 res
= dev_set_mtu(slave_dev
, bond
->dev
->mtu
);
1638 pr_debug("Error %d calling dev_set_mtu\n", res
);
1643 * Save slave's original ("permanent") mac address for modes
1644 * that need it, and for restoring it upon release, and then
1645 * set it to the master's address
1647 memcpy(new_slave
->perm_hwaddr
, slave_dev
->dev_addr
, ETH_ALEN
);
1649 if (!bond
->params
.fail_over_mac
) {
1651 * Set slave to master's mac address. The application already
1652 * set the master's mac address to that of the first slave
1654 memcpy(addr
.sa_data
, bond_dev
->dev_addr
, bond_dev
->addr_len
);
1655 addr
.sa_family
= slave_dev
->type
;
1656 res
= dev_set_mac_address(slave_dev
, &addr
);
1658 pr_debug("Error %d calling set_mac_address\n", res
);
1659 goto err_restore_mtu
;
1663 res
= netdev_set_bond_master(slave_dev
, bond_dev
);
1665 pr_debug("Error %d calling netdev_set_bond_master\n", res
);
1666 goto err_restore_mac
;
1669 /* open the slave since the application closed it */
1670 res
= dev_open(slave_dev
);
1672 pr_debug("Opening slave %s failed\n", slave_dev
->name
);
1673 goto err_unset_master
;
1676 new_slave
->bond
= bond
;
1677 new_slave
->dev
= slave_dev
;
1678 slave_dev
->priv_flags
|= IFF_BONDING
;
1680 if (bond_is_lb(bond
)) {
1681 /* bond_alb_init_slave() must be called before all other stages since
1682 * it might fail and we do not want to have to undo everything
1684 res
= bond_alb_init_slave(bond
, new_slave
);
1689 /* If the mode USES_PRIMARY, then the new slave gets the
1690 * master's promisc (and mc) settings only if it becomes the
1691 * curr_active_slave, and that is taken care of later when calling
1692 * bond_change_active()
1694 if (!USES_PRIMARY(bond
->params
.mode
)) {
1695 /* set promiscuity level to new slave */
1696 if (bond_dev
->flags
& IFF_PROMISC
) {
1697 res
= dev_set_promiscuity(slave_dev
, 1);
1702 /* set allmulti level to new slave */
1703 if (bond_dev
->flags
& IFF_ALLMULTI
) {
1704 res
= dev_set_allmulti(slave_dev
, 1);
1709 netif_addr_lock_bh(bond_dev
);
1710 /* upload master's mc_list to new slave */
1711 netdev_for_each_mc_addr(ha
, bond_dev
)
1712 dev_mc_add(slave_dev
, ha
->addr
);
1713 netif_addr_unlock_bh(bond_dev
);
1716 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
1717 /* add lacpdu mc addr to mc list */
1718 u8 lacpdu_multicast
[ETH_ALEN
] = MULTICAST_LACPDU_ADDR
;
1720 dev_mc_add(slave_dev
, lacpdu_multicast
);
1723 bond_add_vlans_on_slave(bond
, slave_dev
);
1725 write_lock_bh(&bond
->lock
);
1727 bond_attach_slave(bond
, new_slave
);
1729 new_slave
->delay
= 0;
1730 new_slave
->link_failure_count
= 0;
1732 write_unlock_bh(&bond
->lock
);
1734 bond_compute_features(bond
);
1736 read_lock(&bond
->lock
);
1738 new_slave
->last_arp_rx
= jiffies
-
1739 (msecs_to_jiffies(bond
->params
.arp_interval
) + 1);
1741 if (bond
->params
.miimon
&& !bond
->params
.use_carrier
) {
1742 link_reporting
= bond_check_dev_link(bond
, slave_dev
, 1);
1744 if ((link_reporting
== -1) && !bond
->params
.arp_interval
) {
1746 * miimon is set but a bonded network driver
1747 * does not support ETHTOOL/MII and
1748 * arp_interval is not set. Note: if
1749 * use_carrier is enabled, we will never go
1750 * here (because netif_carrier is always
1751 * supported); thus, we don't need to change
1752 * the messages for netif_carrier.
1754 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",
1755 bond_dev
->name
, slave_dev
->name
);
1756 } else if (link_reporting
== -1) {
1757 /* unable get link status using mii/ethtool */
1758 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",
1759 bond_dev
->name
, slave_dev
->name
);
1763 /* check for initial state */
1764 if (bond
->params
.miimon
) {
1765 if (bond_check_dev_link(bond
, slave_dev
, 0) == BMSR_LSTATUS
) {
1766 if (bond
->params
.updelay
) {
1767 new_slave
->link
= BOND_LINK_BACK
;
1768 new_slave
->delay
= bond
->params
.updelay
;
1770 new_slave
->link
= BOND_LINK_UP
;
1773 new_slave
->link
= BOND_LINK_DOWN
;
1775 } else if (bond
->params
.arp_interval
) {
1776 new_slave
->link
= (netif_carrier_ok(slave_dev
) ?
1777 BOND_LINK_UP
: BOND_LINK_DOWN
);
1779 new_slave
->link
= BOND_LINK_UP
;
1782 if (new_slave
->link
!= BOND_LINK_DOWN
)
1783 new_slave
->jiffies
= jiffies
;
1784 pr_debug("Initial state of slave_dev is BOND_LINK_%s\n",
1785 new_slave
->link
== BOND_LINK_DOWN
? "DOWN" :
1786 (new_slave
->link
== BOND_LINK_UP
? "UP" : "BACK"));
1788 bond_update_speed_duplex(new_slave
);
1790 if (USES_PRIMARY(bond
->params
.mode
) && bond
->params
.primary
[0]) {
1791 /* if there is a primary slave, remember it */
1792 if (strcmp(bond
->params
.primary
, new_slave
->dev
->name
) == 0) {
1793 bond
->primary_slave
= new_slave
;
1794 bond
->force_primary
= true;
1798 write_lock_bh(&bond
->curr_slave_lock
);
1800 switch (bond
->params
.mode
) {
1801 case BOND_MODE_ACTIVEBACKUP
:
1802 bond_set_slave_inactive_flags(new_slave
);
1803 bond_select_active_slave(bond
);
1805 case BOND_MODE_8023AD
:
1806 /* in 802.3ad mode, the internal mechanism
1807 * will activate the slaves in the selected
1810 bond_set_slave_inactive_flags(new_slave
);
1811 /* if this is the first slave */
1812 if (bond
->slave_cnt
== 1) {
1813 SLAVE_AD_INFO(new_slave
).id
= 1;
1814 /* Initialize AD with the number of times that the AD timer is called in 1 second
1815 * can be called only after the mac address of the bond is set
1817 bond_3ad_initialize(bond
, 1000/AD_TIMER_INTERVAL
);
1819 SLAVE_AD_INFO(new_slave
).id
=
1820 SLAVE_AD_INFO(new_slave
->prev
).id
+ 1;
1823 bond_3ad_bind_slave(new_slave
);
1827 bond_set_active_slave(new_slave
);
1828 bond_set_slave_inactive_flags(new_slave
);
1829 bond_select_active_slave(bond
);
1832 pr_debug("This slave is always active in trunk mode\n");
1834 /* always active in trunk mode */
1835 bond_set_active_slave(new_slave
);
1837 /* In trunking mode there is little meaning to curr_active_slave
1838 * anyway (it holds no special properties of the bond device),
1839 * so we can change it without calling change_active_interface()
1841 if (!bond
->curr_active_slave
)
1842 bond
->curr_active_slave
= new_slave
;
1845 } /* switch(bond_mode) */
1847 write_unlock_bh(&bond
->curr_slave_lock
);
1849 bond_set_carrier(bond
);
1851 #ifdef CONFIG_NET_POLL_CONTROLLER
1852 slave_dev
->npinfo
= bond_netpoll_info(bond
);
1853 if (slave_dev
->npinfo
) {
1854 if (slave_enable_netpoll(new_slave
)) {
1855 read_unlock(&bond
->lock
);
1856 pr_info("Error, %s: master_dev is using netpoll, "
1857 "but new slave device does not support netpoll.\n",
1865 read_unlock(&bond
->lock
);
1867 res
= bond_create_slave_symlinks(bond_dev
, slave_dev
);
1871 res
= netdev_rx_handler_register(slave_dev
, bond_handle_frame
,
1874 pr_debug("Error %d calling netdev_rx_handler_register\n", res
);
1875 goto err_dest_symlinks
;
1878 pr_info("%s: enslaving %s as a%s interface with a%s link.\n",
1879 bond_dev
->name
, slave_dev
->name
,
1880 bond_is_active_slave(new_slave
) ? "n active" : " backup",
1881 new_slave
->link
!= BOND_LINK_DOWN
? "n up" : " down");
1883 /* enslave is successful */
1886 /* Undo stages on error */
1888 bond_destroy_slave_symlinks(bond_dev
, slave_dev
);
1891 write_lock_bh(&bond
->lock
);
1892 bond_detach_slave(bond
, new_slave
);
1893 write_unlock_bh(&bond
->lock
);
1896 dev_close(slave_dev
);
1899 netdev_set_bond_master(slave_dev
, NULL
);
1902 if (!bond
->params
.fail_over_mac
) {
1903 /* XXX TODO - fom follow mode needs to change master's
1904 * MAC if this slave's MAC is in use by the bond, or at
1905 * least print a warning.
1907 memcpy(addr
.sa_data
, new_slave
->perm_hwaddr
, ETH_ALEN
);
1908 addr
.sa_family
= slave_dev
->type
;
1909 dev_set_mac_address(slave_dev
, &addr
);
1913 dev_set_mtu(slave_dev
, new_slave
->original_mtu
);
1919 bond_compute_features(bond
);
1925 * Try to release the slave device <slave> from the bond device <master>
1926 * It is legal to access curr_active_slave without a lock because all the function
1929 * The rules for slave state should be:
1930 * for Active/Backup:
1931 * Active stays on all backups go down
1932 * for Bonded connections:
1933 * The first up interface should be left on and all others downed.
1935 int bond_release(struct net_device
*bond_dev
, struct net_device
*slave_dev
)
1937 struct bonding
*bond
= netdev_priv(bond_dev
);
1938 struct slave
*slave
, *oldcurrent
;
1939 struct sockaddr addr
;
1940 netdev_features_t old_features
= bond_dev
->features
;
1942 /* slave is not a slave or master is not master of this slave */
1943 if (!(slave_dev
->flags
& IFF_SLAVE
) ||
1944 (slave_dev
->master
!= bond_dev
)) {
1945 pr_err("%s: Error: cannot release %s.\n",
1946 bond_dev
->name
, slave_dev
->name
);
1951 call_netdevice_notifiers(NETDEV_RELEASE
, bond_dev
);
1952 write_lock_bh(&bond
->lock
);
1954 slave
= bond_get_slave_by_dev(bond
, slave_dev
);
1956 /* not a slave of this bond */
1957 pr_info("%s: %s not enslaved\n",
1958 bond_dev
->name
, slave_dev
->name
);
1959 write_unlock_bh(&bond
->lock
);
1960 unblock_netpoll_tx();
1964 /* unregister rx_handler early so bond_handle_frame wouldn't be called
1965 * for this slave anymore.
1967 netdev_rx_handler_unregister(slave_dev
);
1968 write_unlock_bh(&bond
->lock
);
1970 write_lock_bh(&bond
->lock
);
1972 if (!bond
->params
.fail_over_mac
) {
1973 if (ether_addr_equal(bond_dev
->dev_addr
, slave
->perm_hwaddr
) &&
1974 bond
->slave_cnt
> 1)
1975 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",
1976 bond_dev
->name
, slave_dev
->name
,
1978 bond_dev
->name
, slave_dev
->name
);
1981 /* Inform AD package of unbinding of slave. */
1982 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
1983 /* must be called before the slave is
1984 * detached from the list
1986 bond_3ad_unbind_slave(slave
);
1989 pr_info("%s: releasing %s interface %s\n",
1991 bond_is_active_slave(slave
) ? "active" : "backup",
1994 oldcurrent
= bond
->curr_active_slave
;
1996 bond
->current_arp_slave
= NULL
;
1998 /* release the slave from its bond */
1999 bond_detach_slave(bond
, slave
);
2001 if (bond
->primary_slave
== slave
)
2002 bond
->primary_slave
= NULL
;
2004 if (oldcurrent
== slave
)
2005 bond_change_active_slave(bond
, NULL
);
2007 if (bond_is_lb(bond
)) {
2008 /* Must be called only after the slave has been
2009 * detached from the list and the curr_active_slave
2010 * has been cleared (if our_slave == old_current),
2011 * but before a new active slave is selected.
2013 write_unlock_bh(&bond
->lock
);
2014 bond_alb_deinit_slave(bond
, slave
);
2015 write_lock_bh(&bond
->lock
);
2018 if (oldcurrent
== slave
) {
2020 * Note that we hold RTNL over this sequence, so there
2021 * is no concern that another slave add/remove event
2024 write_unlock_bh(&bond
->lock
);
2025 read_lock(&bond
->lock
);
2026 write_lock_bh(&bond
->curr_slave_lock
);
2028 bond_select_active_slave(bond
);
2030 write_unlock_bh(&bond
->curr_slave_lock
);
2031 read_unlock(&bond
->lock
);
2032 write_lock_bh(&bond
->lock
);
2035 if (bond
->slave_cnt
== 0) {
2036 bond_set_carrier(bond
);
2038 /* if the last slave was removed, zero the mac address
2039 * of the master so it will be set by the application
2040 * to the mac address of the first slave
2042 memset(bond_dev
->dev_addr
, 0, bond_dev
->addr_len
);
2044 if (bond_vlan_used(bond
)) {
2045 pr_warning("%s: Warning: clearing HW address of %s while it still has VLANs.\n",
2046 bond_dev
->name
, bond_dev
->name
);
2047 pr_warning("%s: When re-adding slaves, make sure the bond's HW address matches its VLANs'.\n",
2052 write_unlock_bh(&bond
->lock
);
2053 unblock_netpoll_tx();
2055 if (bond
->slave_cnt
== 0)
2056 call_netdevice_notifiers(NETDEV_CHANGEADDR
, bond
->dev
);
2058 bond_compute_features(bond
);
2059 if (!(bond_dev
->features
& NETIF_F_VLAN_CHALLENGED
) &&
2060 (old_features
& NETIF_F_VLAN_CHALLENGED
))
2061 pr_info("%s: last VLAN challenged slave %s left bond %s. VLAN blocking is removed\n",
2062 bond_dev
->name
, slave_dev
->name
, bond_dev
->name
);
2064 /* must do this from outside any spinlocks */
2065 bond_destroy_slave_symlinks(bond_dev
, slave_dev
);
2067 bond_del_vlans_from_slave(bond
, slave_dev
);
2069 /* If the mode USES_PRIMARY, then we should only remove its
2070 * promisc and mc settings if it was the curr_active_slave, but that was
2071 * already taken care of above when we detached the slave
2073 if (!USES_PRIMARY(bond
->params
.mode
)) {
2074 /* unset promiscuity level from slave */
2075 if (bond_dev
->flags
& IFF_PROMISC
)
2076 dev_set_promiscuity(slave_dev
, -1);
2078 /* unset allmulti level from slave */
2079 if (bond_dev
->flags
& IFF_ALLMULTI
)
2080 dev_set_allmulti(slave_dev
, -1);
2082 /* flush master's mc_list from slave */
2083 netif_addr_lock_bh(bond_dev
);
2084 bond_mc_list_flush(bond_dev
, slave_dev
);
2085 netif_addr_unlock_bh(bond_dev
);
2088 netdev_set_bond_master(slave_dev
, NULL
);
2090 slave_disable_netpoll(slave
);
2092 /* close slave before restoring its mac address */
2093 dev_close(slave_dev
);
2095 if (bond
->params
.fail_over_mac
!= BOND_FOM_ACTIVE
) {
2096 /* restore original ("permanent") mac address */
2097 memcpy(addr
.sa_data
, slave
->perm_hwaddr
, ETH_ALEN
);
2098 addr
.sa_family
= slave_dev
->type
;
2099 dev_set_mac_address(slave_dev
, &addr
);
2102 dev_set_mtu(slave_dev
, slave
->original_mtu
);
2104 slave_dev
->priv_flags
&= ~IFF_BONDING
;
2108 return 0; /* deletion OK */
2112 * First release a slave and then destroy the bond if no more slaves are left.
2113 * Must be under rtnl_lock when this function is called.
2115 static int bond_release_and_destroy(struct net_device
*bond_dev
,
2116 struct net_device
*slave_dev
)
2118 struct bonding
*bond
= netdev_priv(bond_dev
);
2121 ret
= bond_release(bond_dev
, slave_dev
);
2122 if ((ret
== 0) && (bond
->slave_cnt
== 0)) {
2123 bond_dev
->priv_flags
|= IFF_DISABLE_NETPOLL
;
2124 pr_info("%s: destroying bond %s.\n",
2125 bond_dev
->name
, bond_dev
->name
);
2126 unregister_netdevice(bond_dev
);
2132 * This function releases all slaves.
2134 static int bond_release_all(struct net_device
*bond_dev
)
2136 struct bonding
*bond
= netdev_priv(bond_dev
);
2137 struct slave
*slave
;
2138 struct net_device
*slave_dev
;
2139 struct sockaddr addr
;
2141 write_lock_bh(&bond
->lock
);
2143 netif_carrier_off(bond_dev
);
2145 if (bond
->slave_cnt
== 0)
2148 bond
->current_arp_slave
= NULL
;
2149 bond
->primary_slave
= NULL
;
2150 bond_change_active_slave(bond
, NULL
);
2152 while ((slave
= bond
->first_slave
) != NULL
) {
2153 /* Inform AD package of unbinding of slave
2154 * before slave is detached from the list.
2156 if (bond
->params
.mode
== BOND_MODE_8023AD
)
2157 bond_3ad_unbind_slave(slave
);
2159 slave_dev
= slave
->dev
;
2160 bond_detach_slave(bond
, slave
);
2162 /* now that the slave is detached, unlock and perform
2163 * all the undo steps that should not be called from
2166 write_unlock_bh(&bond
->lock
);
2168 /* unregister rx_handler early so bond_handle_frame wouldn't
2169 * be called for this slave anymore.
2171 netdev_rx_handler_unregister(slave_dev
);
2174 if (bond_is_lb(bond
)) {
2175 /* must be called only after the slave
2176 * has been detached from the list
2178 bond_alb_deinit_slave(bond
, slave
);
2181 bond_destroy_slave_symlinks(bond_dev
, slave_dev
);
2182 bond_del_vlans_from_slave(bond
, slave_dev
);
2184 /* If the mode USES_PRIMARY, then we should only remove its
2185 * promisc and mc settings if it was the curr_active_slave, but that was
2186 * already taken care of above when we detached the slave
2188 if (!USES_PRIMARY(bond
->params
.mode
)) {
2189 /* unset promiscuity level from slave */
2190 if (bond_dev
->flags
& IFF_PROMISC
)
2191 dev_set_promiscuity(slave_dev
, -1);
2193 /* unset allmulti level from slave */
2194 if (bond_dev
->flags
& IFF_ALLMULTI
)
2195 dev_set_allmulti(slave_dev
, -1);
2197 /* flush master's mc_list from slave */
2198 netif_addr_lock_bh(bond_dev
);
2199 bond_mc_list_flush(bond_dev
, slave_dev
);
2200 netif_addr_unlock_bh(bond_dev
);
2203 netdev_set_bond_master(slave_dev
, NULL
);
2205 slave_disable_netpoll(slave
);
2207 /* close slave before restoring its mac address */
2208 dev_close(slave_dev
);
2210 if (!bond
->params
.fail_over_mac
) {
2211 /* restore original ("permanent") mac address*/
2212 memcpy(addr
.sa_data
, slave
->perm_hwaddr
, ETH_ALEN
);
2213 addr
.sa_family
= slave_dev
->type
;
2214 dev_set_mac_address(slave_dev
, &addr
);
2219 /* re-acquire the lock before getting the next slave */
2220 write_lock_bh(&bond
->lock
);
2223 /* zero the mac address of the master so it will be
2224 * set by the application to the mac address of the
2227 memset(bond_dev
->dev_addr
, 0, bond_dev
->addr_len
);
2229 if (bond_vlan_used(bond
)) {
2230 pr_warning("%s: Warning: clearing HW address of %s while it still has VLANs.\n",
2231 bond_dev
->name
, bond_dev
->name
);
2232 pr_warning("%s: When re-adding slaves, make sure the bond's HW address matches its VLANs'.\n",
2236 pr_info("%s: released all slaves\n", bond_dev
->name
);
2239 write_unlock_bh(&bond
->lock
);
2241 bond_compute_features(bond
);
2247 * This function changes the active slave to slave <slave_dev>.
2248 * It returns -EINVAL in the following cases.
2249 * - <slave_dev> is not found in the list.
2250 * - There is not active slave now.
2251 * - <slave_dev> is already active.
2252 * - The link state of <slave_dev> is not BOND_LINK_UP.
2253 * - <slave_dev> is not running.
2254 * In these cases, this function does nothing.
2255 * In the other cases, current_slave pointer is changed and 0 is returned.
2257 static int bond_ioctl_change_active(struct net_device
*bond_dev
, struct net_device
*slave_dev
)
2259 struct bonding
*bond
= netdev_priv(bond_dev
);
2260 struct slave
*old_active
= NULL
;
2261 struct slave
*new_active
= NULL
;
2264 if (!USES_PRIMARY(bond
->params
.mode
))
2267 /* Verify that master_dev is indeed the master of slave_dev */
2268 if (!(slave_dev
->flags
& IFF_SLAVE
) || (slave_dev
->master
!= bond_dev
))
2271 read_lock(&bond
->lock
);
2273 read_lock(&bond
->curr_slave_lock
);
2274 old_active
= bond
->curr_active_slave
;
2275 read_unlock(&bond
->curr_slave_lock
);
2277 new_active
= bond_get_slave_by_dev(bond
, slave_dev
);
2280 * Changing to the current active: do nothing; return success.
2282 if (new_active
&& (new_active
== old_active
)) {
2283 read_unlock(&bond
->lock
);
2289 (new_active
->link
== BOND_LINK_UP
) &&
2290 IS_UP(new_active
->dev
)) {
2292 write_lock_bh(&bond
->curr_slave_lock
);
2293 bond_change_active_slave(bond
, new_active
);
2294 write_unlock_bh(&bond
->curr_slave_lock
);
2295 unblock_netpoll_tx();
2299 read_unlock(&bond
->lock
);
2304 static int bond_info_query(struct net_device
*bond_dev
, struct ifbond
*info
)
2306 struct bonding
*bond
= netdev_priv(bond_dev
);
2308 info
->bond_mode
= bond
->params
.mode
;
2309 info
->miimon
= bond
->params
.miimon
;
2311 read_lock(&bond
->lock
);
2312 info
->num_slaves
= bond
->slave_cnt
;
2313 read_unlock(&bond
->lock
);
2318 static int bond_slave_info_query(struct net_device
*bond_dev
, struct ifslave
*info
)
2320 struct bonding
*bond
= netdev_priv(bond_dev
);
2321 struct slave
*slave
;
2322 int i
, res
= -ENODEV
;
2324 read_lock(&bond
->lock
);
2326 bond_for_each_slave(bond
, slave
, i
) {
2327 if (i
== (int)info
->slave_id
) {
2329 strcpy(info
->slave_name
, slave
->dev
->name
);
2330 info
->link
= slave
->link
;
2331 info
->state
= bond_slave_state(slave
);
2332 info
->link_failure_count
= slave
->link_failure_count
;
2337 read_unlock(&bond
->lock
);
2342 /*-------------------------------- Monitoring -------------------------------*/
2345 static int bond_miimon_inspect(struct bonding
*bond
)
2347 struct slave
*slave
;
2348 int i
, link_state
, commit
= 0;
2349 bool ignore_updelay
;
2351 ignore_updelay
= !bond
->curr_active_slave
? true : false;
2353 bond_for_each_slave(bond
, slave
, i
) {
2354 slave
->new_link
= BOND_LINK_NOCHANGE
;
2356 link_state
= bond_check_dev_link(bond
, slave
->dev
, 0);
2358 switch (slave
->link
) {
2363 slave
->link
= BOND_LINK_FAIL
;
2364 slave
->delay
= bond
->params
.downdelay
;
2366 pr_info("%s: link status down for %sinterface %s, disabling it in %d ms.\n",
2368 (bond
->params
.mode
==
2369 BOND_MODE_ACTIVEBACKUP
) ?
2370 (bond_is_active_slave(slave
) ?
2371 "active " : "backup ") : "",
2373 bond
->params
.downdelay
* bond
->params
.miimon
);
2376 case BOND_LINK_FAIL
:
2379 * recovered before downdelay expired
2381 slave
->link
= BOND_LINK_UP
;
2382 slave
->jiffies
= jiffies
;
2383 pr_info("%s: link status up again after %d ms for interface %s.\n",
2385 (bond
->params
.downdelay
- slave
->delay
) *
2386 bond
->params
.miimon
,
2391 if (slave
->delay
<= 0) {
2392 slave
->new_link
= BOND_LINK_DOWN
;
2400 case BOND_LINK_DOWN
:
2404 slave
->link
= BOND_LINK_BACK
;
2405 slave
->delay
= bond
->params
.updelay
;
2408 pr_info("%s: link status up for interface %s, enabling it in %d ms.\n",
2409 bond
->dev
->name
, slave
->dev
->name
,
2410 ignore_updelay
? 0 :
2411 bond
->params
.updelay
*
2412 bond
->params
.miimon
);
2415 case BOND_LINK_BACK
:
2417 slave
->link
= BOND_LINK_DOWN
;
2418 pr_info("%s: link status down again after %d ms for interface %s.\n",
2420 (bond
->params
.updelay
- slave
->delay
) *
2421 bond
->params
.miimon
,
2430 if (slave
->delay
<= 0) {
2431 slave
->new_link
= BOND_LINK_UP
;
2433 ignore_updelay
= false;
2445 static void bond_miimon_commit(struct bonding
*bond
)
2447 struct slave
*slave
;
2450 bond_for_each_slave(bond
, slave
, i
) {
2451 switch (slave
->new_link
) {
2452 case BOND_LINK_NOCHANGE
:
2456 slave
->link
= BOND_LINK_UP
;
2457 slave
->jiffies
= jiffies
;
2459 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
2460 /* prevent it from being the active one */
2461 bond_set_backup_slave(slave
);
2462 } else if (bond
->params
.mode
!= BOND_MODE_ACTIVEBACKUP
) {
2463 /* make it immediately active */
2464 bond_set_active_slave(slave
);
2465 } else if (slave
!= bond
->primary_slave
) {
2466 /* prevent it from being the active one */
2467 bond_set_backup_slave(slave
);
2470 bond_update_speed_duplex(slave
);
2472 pr_info("%s: link status definitely up for interface %s, %u Mbps %s duplex.\n",
2473 bond
->dev
->name
, slave
->dev
->name
,
2474 slave
->speed
, slave
->duplex
? "full" : "half");
2476 /* notify ad that the link status has changed */
2477 if (bond
->params
.mode
== BOND_MODE_8023AD
)
2478 bond_3ad_handle_link_change(slave
, BOND_LINK_UP
);
2480 if (bond_is_lb(bond
))
2481 bond_alb_handle_link_change(bond
, slave
,
2484 if (!bond
->curr_active_slave
||
2485 (slave
== bond
->primary_slave
))
2490 case BOND_LINK_DOWN
:
2491 if (slave
->link_failure_count
< UINT_MAX
)
2492 slave
->link_failure_count
++;
2494 slave
->link
= BOND_LINK_DOWN
;
2496 if (bond
->params
.mode
== BOND_MODE_ACTIVEBACKUP
||
2497 bond
->params
.mode
== BOND_MODE_8023AD
)
2498 bond_set_slave_inactive_flags(slave
);
2500 pr_info("%s: link status definitely down for interface %s, disabling it\n",
2501 bond
->dev
->name
, slave
->dev
->name
);
2503 if (bond
->params
.mode
== BOND_MODE_8023AD
)
2504 bond_3ad_handle_link_change(slave
,
2507 if (bond_is_lb(bond
))
2508 bond_alb_handle_link_change(bond
, slave
,
2511 if (slave
== bond
->curr_active_slave
)
2517 pr_err("%s: invalid new link %d on slave %s\n",
2518 bond
->dev
->name
, slave
->new_link
,
2520 slave
->new_link
= BOND_LINK_NOCHANGE
;
2528 write_lock_bh(&bond
->curr_slave_lock
);
2529 bond_select_active_slave(bond
);
2530 write_unlock_bh(&bond
->curr_slave_lock
);
2531 unblock_netpoll_tx();
2534 bond_set_carrier(bond
);
2540 * Really a wrapper that splits the mii monitor into two phases: an
2541 * inspection, then (if inspection indicates something needs to be done)
2542 * an acquisition of appropriate locks followed by a commit phase to
2543 * implement whatever link state changes are indicated.
2545 void bond_mii_monitor(struct work_struct
*work
)
2547 struct bonding
*bond
= container_of(work
, struct bonding
,
2549 bool should_notify_peers
= false;
2550 unsigned long delay
;
2552 read_lock(&bond
->lock
);
2554 delay
= msecs_to_jiffies(bond
->params
.miimon
);
2556 if (bond
->slave_cnt
== 0)
2559 should_notify_peers
= bond_should_notify_peers(bond
);
2561 if (bond_miimon_inspect(bond
)) {
2562 read_unlock(&bond
->lock
);
2564 /* Race avoidance with bond_close cancel of workqueue */
2565 if (!rtnl_trylock()) {
2566 read_lock(&bond
->lock
);
2568 should_notify_peers
= false;
2572 read_lock(&bond
->lock
);
2574 bond_miimon_commit(bond
);
2576 read_unlock(&bond
->lock
);
2577 rtnl_unlock(); /* might sleep, hold no other locks */
2578 read_lock(&bond
->lock
);
2582 if (bond
->params
.miimon
)
2583 queue_delayed_work(bond
->wq
, &bond
->mii_work
, delay
);
2585 read_unlock(&bond
->lock
);
2587 if (should_notify_peers
) {
2588 if (!rtnl_trylock()) {
2589 read_lock(&bond
->lock
);
2590 bond
->send_peer_notif
++;
2591 read_unlock(&bond
->lock
);
2594 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS
, bond
->dev
);
2599 static int bond_has_this_ip(struct bonding
*bond
, __be32 ip
)
2601 struct vlan_entry
*vlan
;
2602 struct net_device
*vlan_dev
;
2604 if (ip
== bond_confirm_addr(bond
->dev
, 0, ip
))
2607 list_for_each_entry(vlan
, &bond
->vlan_list
, vlan_list
) {
2609 vlan_dev
= __vlan_find_dev_deep(bond
->dev
, vlan
->vlan_id
);
2611 if (vlan_dev
&& ip
== bond_confirm_addr(vlan_dev
, 0, ip
))
2619 * We go to the (large) trouble of VLAN tagging ARP frames because
2620 * switches in VLAN mode (especially if ports are configured as
2621 * "native" to a VLAN) might not pass non-tagged frames.
2623 static void bond_arp_send(struct net_device
*slave_dev
, int arp_op
, __be32 dest_ip
, __be32 src_ip
, unsigned short vlan_id
)
2625 struct sk_buff
*skb
;
2627 pr_debug("arp %d on slave %s: dst %x src %x vid %d\n", arp_op
,
2628 slave_dev
->name
, dest_ip
, src_ip
, vlan_id
);
2630 skb
= arp_create(arp_op
, ETH_P_ARP
, dest_ip
, slave_dev
, src_ip
,
2631 NULL
, slave_dev
->dev_addr
, NULL
);
2634 pr_err("ARP packet allocation failed\n");
2638 skb
= vlan_put_tag(skb
, vlan_id
);
2640 pr_err("failed to insert VLAN tag\n");
2648 static void bond_arp_send_all(struct bonding
*bond
, struct slave
*slave
)
2651 __be32
*targets
= bond
->params
.arp_targets
;
2652 struct vlan_entry
*vlan
;
2653 struct net_device
*vlan_dev
= NULL
;
2656 for (i
= 0; (i
< BOND_MAX_ARP_TARGETS
); i
++) {
2660 pr_debug("basa: target %x\n", targets
[i
]);
2661 if (!bond_vlan_used(bond
)) {
2662 pr_debug("basa: empty vlan: arp_send\n");
2663 addr
= bond_confirm_addr(bond
->dev
, targets
[i
], 0);
2664 bond_arp_send(slave
->dev
, ARPOP_REQUEST
, targets
[i
],
2670 * If VLANs are configured, we do a route lookup to
2671 * determine which VLAN interface would be used, so we
2672 * can tag the ARP with the proper VLAN tag.
2674 rt
= ip_route_output(dev_net(bond
->dev
), targets
[i
], 0,
2677 if (net_ratelimit()) {
2678 pr_warning("%s: no route to arp_ip_target %pI4\n",
2679 bond
->dev
->name
, &targets
[i
]);
2685 * This target is not on a VLAN
2687 if (rt
->dst
.dev
== bond
->dev
) {
2689 pr_debug("basa: rtdev == bond->dev: arp_send\n");
2690 addr
= bond_confirm_addr(bond
->dev
, targets
[i
], 0);
2691 bond_arp_send(slave
->dev
, ARPOP_REQUEST
, targets
[i
],
2697 list_for_each_entry(vlan
, &bond
->vlan_list
, vlan_list
) {
2699 vlan_dev
= __vlan_find_dev_deep(bond
->dev
,
2702 if (vlan_dev
== rt
->dst
.dev
) {
2703 vlan_id
= vlan
->vlan_id
;
2704 pr_debug("basa: vlan match on %s %d\n",
2705 vlan_dev
->name
, vlan_id
);
2710 if (vlan_id
&& vlan_dev
) {
2712 addr
= bond_confirm_addr(vlan_dev
, targets
[i
], 0);
2713 bond_arp_send(slave
->dev
, ARPOP_REQUEST
, targets
[i
],
2718 if (net_ratelimit()) {
2719 pr_warning("%s: no path to arp_ip_target %pI4 via rt.dev %s\n",
2720 bond
->dev
->name
, &targets
[i
],
2721 rt
->dst
.dev
? rt
->dst
.dev
->name
: "NULL");
2727 static void bond_validate_arp(struct bonding
*bond
, struct slave
*slave
, __be32 sip
, __be32 tip
)
2730 __be32
*targets
= bond
->params
.arp_targets
;
2732 for (i
= 0; (i
< BOND_MAX_ARP_TARGETS
) && targets
[i
]; i
++) {
2733 pr_debug("bva: sip %pI4 tip %pI4 t[%d] %pI4 bhti(tip) %d\n",
2734 &sip
, &tip
, i
, &targets
[i
],
2735 bond_has_this_ip(bond
, tip
));
2736 if (sip
== targets
[i
]) {
2737 if (bond_has_this_ip(bond
, tip
))
2738 slave
->last_arp_rx
= jiffies
;
2744 static int bond_arp_rcv(const struct sk_buff
*skb
, struct bonding
*bond
,
2745 struct slave
*slave
)
2747 struct arphdr
*arp
= (struct arphdr
*)skb
->data
;
2748 unsigned char *arp_ptr
;
2752 if (skb
->protocol
!= __cpu_to_be16(ETH_P_ARP
))
2753 return RX_HANDLER_ANOTHER
;
2755 read_lock(&bond
->lock
);
2756 alen
= arp_hdr_len(bond
->dev
);
2758 pr_debug("bond_arp_rcv: bond %s skb->dev %s\n",
2759 bond
->dev
->name
, skb
->dev
->name
);
2761 if (alen
> skb_headlen(skb
)) {
2762 arp
= kmalloc(alen
, GFP_ATOMIC
);
2765 if (skb_copy_bits(skb
, 0, arp
, alen
) < 0)
2769 if (arp
->ar_hln
!= bond
->dev
->addr_len
||
2770 skb
->pkt_type
== PACKET_OTHERHOST
||
2771 skb
->pkt_type
== PACKET_LOOPBACK
||
2772 arp
->ar_hrd
!= htons(ARPHRD_ETHER
) ||
2773 arp
->ar_pro
!= htons(ETH_P_IP
) ||
2777 arp_ptr
= (unsigned char *)(arp
+ 1);
2778 arp_ptr
+= bond
->dev
->addr_len
;
2779 memcpy(&sip
, arp_ptr
, 4);
2780 arp_ptr
+= 4 + bond
->dev
->addr_len
;
2781 memcpy(&tip
, arp_ptr
, 4);
2783 pr_debug("bond_arp_rcv: %s %s/%d av %d sv %d sip %pI4 tip %pI4\n",
2784 bond
->dev
->name
, slave
->dev
->name
, bond_slave_state(slave
),
2785 bond
->params
.arp_validate
, slave_do_arp_validate(bond
, slave
),
2789 * Backup slaves won't see the ARP reply, but do come through
2790 * here for each ARP probe (so we swap the sip/tip to validate
2791 * the probe). In a "redundant switch, common router" type of
2792 * configuration, the ARP probe will (hopefully) travel from
2793 * the active, through one switch, the router, then the other
2794 * switch before reaching the backup.
2796 if (bond_is_active_slave(slave
))
2797 bond_validate_arp(bond
, slave
, sip
, tip
);
2799 bond_validate_arp(bond
, slave
, tip
, sip
);
2802 read_unlock(&bond
->lock
);
2803 if (arp
!= (struct arphdr
*)skb
->data
)
2805 return RX_HANDLER_ANOTHER
;
2809 * this function is called regularly to monitor each slave's link
2810 * ensuring that traffic is being sent and received when arp monitoring
2811 * is used in load-balancing mode. if the adapter has been dormant, then an
2812 * arp is transmitted to generate traffic. see activebackup_arp_monitor for
2813 * arp monitoring in active backup mode.
2815 void bond_loadbalance_arp_mon(struct work_struct
*work
)
2817 struct bonding
*bond
= container_of(work
, struct bonding
,
2819 struct slave
*slave
, *oldcurrent
;
2820 int do_failover
= 0;
2821 int delta_in_ticks
, extra_ticks
;
2824 read_lock(&bond
->lock
);
2826 delta_in_ticks
= msecs_to_jiffies(bond
->params
.arp_interval
);
2827 extra_ticks
= delta_in_ticks
/ 2;
2829 if (bond
->slave_cnt
== 0)
2832 read_lock(&bond
->curr_slave_lock
);
2833 oldcurrent
= bond
->curr_active_slave
;
2834 read_unlock(&bond
->curr_slave_lock
);
2836 /* see if any of the previous devices are up now (i.e. they have
2837 * xmt and rcv traffic). the curr_active_slave does not come into
2838 * the picture unless it is null. also, slave->jiffies is not needed
2839 * here because we send an arp on each slave and give a slave as
2840 * long as it needs to get the tx/rx within the delta.
2841 * TODO: what about up/down delay in arp mode? it wasn't here before
2844 bond_for_each_slave(bond
, slave
, i
) {
2845 unsigned long trans_start
= dev_trans_start(slave
->dev
);
2847 if (slave
->link
!= BOND_LINK_UP
) {
2848 if (time_in_range(jiffies
,
2849 trans_start
- delta_in_ticks
,
2850 trans_start
+ delta_in_ticks
+ extra_ticks
) &&
2851 time_in_range(jiffies
,
2852 slave
->dev
->last_rx
- delta_in_ticks
,
2853 slave
->dev
->last_rx
+ delta_in_ticks
+ extra_ticks
)) {
2855 slave
->link
= BOND_LINK_UP
;
2856 bond_set_active_slave(slave
);
2858 /* primary_slave has no meaning in round-robin
2859 * mode. the window of a slave being up and
2860 * curr_active_slave being null after enslaving
2864 pr_info("%s: link status definitely up for interface %s, ",
2869 pr_info("%s: interface %s is now up\n",
2875 /* slave->link == BOND_LINK_UP */
2877 /* not all switches will respond to an arp request
2878 * when the source ip is 0, so don't take the link down
2879 * if we don't know our ip yet
2881 if (!time_in_range(jiffies
,
2882 trans_start
- delta_in_ticks
,
2883 trans_start
+ 2 * delta_in_ticks
+ extra_ticks
) ||
2884 !time_in_range(jiffies
,
2885 slave
->dev
->last_rx
- delta_in_ticks
,
2886 slave
->dev
->last_rx
+ 2 * delta_in_ticks
+ extra_ticks
)) {
2888 slave
->link
= BOND_LINK_DOWN
;
2889 bond_set_backup_slave(slave
);
2891 if (slave
->link_failure_count
< UINT_MAX
)
2892 slave
->link_failure_count
++;
2894 pr_info("%s: interface %s is now down.\n",
2898 if (slave
== oldcurrent
)
2903 /* note: if switch is in round-robin mode, all links
2904 * must tx arp to ensure all links rx an arp - otherwise
2905 * links may oscillate or not come up at all; if switch is
2906 * in something like xor mode, there is nothing we can
2907 * do - all replies will be rx'ed on same link causing slaves
2908 * to be unstable during low/no traffic periods
2910 if (IS_UP(slave
->dev
))
2911 bond_arp_send_all(bond
, slave
);
2916 write_lock_bh(&bond
->curr_slave_lock
);
2918 bond_select_active_slave(bond
);
2920 write_unlock_bh(&bond
->curr_slave_lock
);
2921 unblock_netpoll_tx();
2925 if (bond
->params
.arp_interval
)
2926 queue_delayed_work(bond
->wq
, &bond
->arp_work
, delta_in_ticks
);
2928 read_unlock(&bond
->lock
);
2932 * Called to inspect slaves for active-backup mode ARP monitor link state
2933 * changes. Sets new_link in slaves to specify what action should take
2934 * place for the slave. Returns 0 if no changes are found, >0 if changes
2935 * to link states must be committed.
2937 * Called with bond->lock held for read.
2939 static int bond_ab_arp_inspect(struct bonding
*bond
, int delta_in_ticks
)
2941 struct slave
*slave
;
2943 unsigned long trans_start
;
2946 /* All the time comparisons below need some extra time. Otherwise, on
2947 * fast networks the ARP probe/reply may arrive within the same jiffy
2948 * as it was sent. Then, the next time the ARP monitor is run, one
2949 * arp_interval will already have passed in the comparisons.
2951 extra_ticks
= delta_in_ticks
/ 2;
2953 bond_for_each_slave(bond
, slave
, i
) {
2954 slave
->new_link
= BOND_LINK_NOCHANGE
;
2956 if (slave
->link
!= BOND_LINK_UP
) {
2957 if (time_in_range(jiffies
,
2958 slave_last_rx(bond
, slave
) - delta_in_ticks
,
2959 slave_last_rx(bond
, slave
) + delta_in_ticks
+ extra_ticks
)) {
2961 slave
->new_link
= BOND_LINK_UP
;
2969 * Give slaves 2*delta after being enslaved or made
2970 * active. This avoids bouncing, as the last receive
2971 * times need a full ARP monitor cycle to be updated.
2973 if (time_in_range(jiffies
,
2974 slave
->jiffies
- delta_in_ticks
,
2975 slave
->jiffies
+ 2 * delta_in_ticks
+ extra_ticks
))
2979 * Backup slave is down if:
2980 * - No current_arp_slave AND
2981 * - more than 3*delta since last receive AND
2982 * - the bond has an IP address
2984 * Note: a non-null current_arp_slave indicates
2985 * the curr_active_slave went down and we are
2986 * searching for a new one; under this condition
2987 * we only take the curr_active_slave down - this
2988 * gives each slave a chance to tx/rx traffic
2989 * before being taken out
2991 if (!bond_is_active_slave(slave
) &&
2992 !bond
->current_arp_slave
&&
2993 !time_in_range(jiffies
,
2994 slave_last_rx(bond
, slave
) - delta_in_ticks
,
2995 slave_last_rx(bond
, slave
) + 3 * delta_in_ticks
+ extra_ticks
)) {
2997 slave
->new_link
= BOND_LINK_DOWN
;
3002 * Active slave is down if:
3003 * - more than 2*delta since transmitting OR
3004 * - (more than 2*delta since receive AND
3005 * the bond has an IP address)
3007 trans_start
= dev_trans_start(slave
->dev
);
3008 if (bond_is_active_slave(slave
) &&
3009 (!time_in_range(jiffies
,
3010 trans_start
- delta_in_ticks
,
3011 trans_start
+ 2 * delta_in_ticks
+ extra_ticks
) ||
3012 !time_in_range(jiffies
,
3013 slave_last_rx(bond
, slave
) - delta_in_ticks
,
3014 slave_last_rx(bond
, slave
) + 2 * delta_in_ticks
+ extra_ticks
))) {
3016 slave
->new_link
= BOND_LINK_DOWN
;
3025 * Called to commit link state changes noted by inspection step of
3026 * active-backup mode ARP monitor.
3028 * Called with RTNL and bond->lock for read.
3030 static void bond_ab_arp_commit(struct bonding
*bond
, int delta_in_ticks
)
3032 struct slave
*slave
;
3034 unsigned long trans_start
;
3036 bond_for_each_slave(bond
, slave
, i
) {
3037 switch (slave
->new_link
) {
3038 case BOND_LINK_NOCHANGE
:
3042 trans_start
= dev_trans_start(slave
->dev
);
3043 if ((!bond
->curr_active_slave
&&
3044 time_in_range(jiffies
,
3045 trans_start
- delta_in_ticks
,
3046 trans_start
+ delta_in_ticks
+ delta_in_ticks
/ 2)) ||
3047 bond
->curr_active_slave
!= slave
) {
3048 slave
->link
= BOND_LINK_UP
;
3049 if (bond
->current_arp_slave
) {
3050 bond_set_slave_inactive_flags(
3051 bond
->current_arp_slave
);
3052 bond
->current_arp_slave
= NULL
;
3055 pr_info("%s: link status definitely up for interface %s.\n",
3056 bond
->dev
->name
, slave
->dev
->name
);
3058 if (!bond
->curr_active_slave
||
3059 (slave
== bond
->primary_slave
))
3066 case BOND_LINK_DOWN
:
3067 if (slave
->link_failure_count
< UINT_MAX
)
3068 slave
->link_failure_count
++;
3070 slave
->link
= BOND_LINK_DOWN
;
3071 bond_set_slave_inactive_flags(slave
);
3073 pr_info("%s: link status definitely down for interface %s, disabling it\n",
3074 bond
->dev
->name
, slave
->dev
->name
);
3076 if (slave
== bond
->curr_active_slave
) {
3077 bond
->current_arp_slave
= NULL
;
3084 pr_err("%s: impossible: new_link %d on slave %s\n",
3085 bond
->dev
->name
, slave
->new_link
,
3093 write_lock_bh(&bond
->curr_slave_lock
);
3094 bond_select_active_slave(bond
);
3095 write_unlock_bh(&bond
->curr_slave_lock
);
3096 unblock_netpoll_tx();
3099 bond_set_carrier(bond
);
3103 * Send ARP probes for active-backup mode ARP monitor.
3105 * Called with bond->lock held for read.
3107 static void bond_ab_arp_probe(struct bonding
*bond
)
3109 struct slave
*slave
;
3112 read_lock(&bond
->curr_slave_lock
);
3114 if (bond
->current_arp_slave
&& bond
->curr_active_slave
)
3115 pr_info("PROBE: c_arp %s && cas %s BAD\n",
3116 bond
->current_arp_slave
->dev
->name
,
3117 bond
->curr_active_slave
->dev
->name
);
3119 if (bond
->curr_active_slave
) {
3120 bond_arp_send_all(bond
, bond
->curr_active_slave
);
3121 read_unlock(&bond
->curr_slave_lock
);
3125 read_unlock(&bond
->curr_slave_lock
);
3127 /* if we don't have a curr_active_slave, search for the next available
3128 * backup slave from the current_arp_slave and make it the candidate
3129 * for becoming the curr_active_slave
3132 if (!bond
->current_arp_slave
) {
3133 bond
->current_arp_slave
= bond
->first_slave
;
3134 if (!bond
->current_arp_slave
)
3138 bond_set_slave_inactive_flags(bond
->current_arp_slave
);
3140 /* search for next candidate */
3141 bond_for_each_slave_from(bond
, slave
, i
, bond
->current_arp_slave
->next
) {
3142 if (IS_UP(slave
->dev
)) {
3143 slave
->link
= BOND_LINK_BACK
;
3144 bond_set_slave_active_flags(slave
);
3145 bond_arp_send_all(bond
, slave
);
3146 slave
->jiffies
= jiffies
;
3147 bond
->current_arp_slave
= slave
;
3151 /* if the link state is up at this point, we
3152 * mark it down - this can happen if we have
3153 * simultaneous link failures and
3154 * reselect_active_interface doesn't make this
3155 * one the current slave so it is still marked
3156 * up when it is actually down
3158 if (slave
->link
== BOND_LINK_UP
) {
3159 slave
->link
= BOND_LINK_DOWN
;
3160 if (slave
->link_failure_count
< UINT_MAX
)
3161 slave
->link_failure_count
++;
3163 bond_set_slave_inactive_flags(slave
);
3165 pr_info("%s: backup interface %s is now down.\n",
3166 bond
->dev
->name
, slave
->dev
->name
);
3171 void bond_activebackup_arp_mon(struct work_struct
*work
)
3173 struct bonding
*bond
= container_of(work
, struct bonding
,
3175 bool should_notify_peers
= false;
3178 read_lock(&bond
->lock
);
3180 delta_in_ticks
= msecs_to_jiffies(bond
->params
.arp_interval
);
3182 if (bond
->slave_cnt
== 0)
3185 should_notify_peers
= bond_should_notify_peers(bond
);
3187 if (bond_ab_arp_inspect(bond
, delta_in_ticks
)) {
3188 read_unlock(&bond
->lock
);
3190 /* Race avoidance with bond_close flush of workqueue */
3191 if (!rtnl_trylock()) {
3192 read_lock(&bond
->lock
);
3194 should_notify_peers
= false;
3198 read_lock(&bond
->lock
);
3200 bond_ab_arp_commit(bond
, delta_in_ticks
);
3202 read_unlock(&bond
->lock
);
3204 read_lock(&bond
->lock
);
3207 bond_ab_arp_probe(bond
);
3210 if (bond
->params
.arp_interval
)
3211 queue_delayed_work(bond
->wq
, &bond
->arp_work
, delta_in_ticks
);
3213 read_unlock(&bond
->lock
);
3215 if (should_notify_peers
) {
3216 if (!rtnl_trylock()) {
3217 read_lock(&bond
->lock
);
3218 bond
->send_peer_notif
++;
3219 read_unlock(&bond
->lock
);
3222 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS
, bond
->dev
);
3227 /*-------------------------- netdev event handling --------------------------*/
3230 * Change device name
3232 static int bond_event_changename(struct bonding
*bond
)
3234 bond_remove_proc_entry(bond
);
3235 bond_create_proc_entry(bond
);
3237 bond_debug_reregister(bond
);
3242 static int bond_master_netdev_event(unsigned long event
,
3243 struct net_device
*bond_dev
)
3245 struct bonding
*event_bond
= netdev_priv(bond_dev
);
3248 case NETDEV_CHANGENAME
:
3249 return bond_event_changename(event_bond
);
3250 case NETDEV_UNREGISTER
:
3251 bond_remove_proc_entry(event_bond
);
3253 case NETDEV_REGISTER
:
3254 bond_create_proc_entry(event_bond
);
3263 static int bond_slave_netdev_event(unsigned long event
,
3264 struct net_device
*slave_dev
)
3266 struct net_device
*bond_dev
= slave_dev
->master
;
3267 struct bonding
*bond
= netdev_priv(bond_dev
);
3268 struct slave
*slave
= NULL
;
3271 case NETDEV_UNREGISTER
:
3273 if (bond
->setup_by_slave
)
3274 bond_release_and_destroy(bond_dev
, slave_dev
);
3276 bond_release(bond_dev
, slave_dev
);
3281 slave
= bond_get_slave_by_dev(bond
, slave_dev
);
3283 u32 old_speed
= slave
->speed
;
3284 u8 old_duplex
= slave
->duplex
;
3286 bond_update_speed_duplex(slave
);
3288 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
3289 if (old_speed
!= slave
->speed
)
3290 bond_3ad_adapter_speed_changed(slave
);
3291 if (old_duplex
!= slave
->duplex
)
3292 bond_3ad_adapter_duplex_changed(slave
);
3299 * ... Or is it this?
3302 case NETDEV_CHANGEMTU
:
3304 * TODO: Should slaves be allowed to
3305 * independently alter their MTU? For
3306 * an active-backup bond, slaves need
3307 * not be the same type of device, so
3308 * MTUs may vary. For other modes,
3309 * slaves arguably should have the
3310 * same MTUs. To do this, we'd need to
3311 * take over the slave's change_mtu
3312 * function for the duration of their
3316 case NETDEV_CHANGENAME
:
3318 * TODO: handle changing the primary's name
3321 case NETDEV_FEAT_CHANGE
:
3322 bond_compute_features(bond
);
3332 * bond_netdev_event: handle netdev notifier chain events.
3334 * This function receives events for the netdev chain. The caller (an
3335 * ioctl handler calling blocking_notifier_call_chain) holds the necessary
3336 * locks for us to safely manipulate the slave devices (RTNL lock,
3339 static int bond_netdev_event(struct notifier_block
*this,
3340 unsigned long event
, void *ptr
)
3342 struct net_device
*event_dev
= (struct net_device
*)ptr
;
3344 pr_debug("event_dev: %s, event: %lx\n",
3345 event_dev
? event_dev
->name
: "None",
3348 if (!(event_dev
->priv_flags
& IFF_BONDING
))
3351 if (event_dev
->flags
& IFF_MASTER
) {
3352 pr_debug("IFF_MASTER\n");
3353 return bond_master_netdev_event(event
, event_dev
);
3356 if (event_dev
->flags
& IFF_SLAVE
) {
3357 pr_debug("IFF_SLAVE\n");
3358 return bond_slave_netdev_event(event
, event_dev
);
3364 static struct notifier_block bond_netdev_notifier
= {
3365 .notifier_call
= bond_netdev_event
,
3368 /*---------------------------- Hashing Policies -----------------------------*/
3371 * Hash for the output device based upon layer 2 data
3373 static int bond_xmit_hash_policy_l2(struct sk_buff
*skb
, int count
)
3375 struct ethhdr
*data
= (struct ethhdr
*)skb
->data
;
3377 if (skb_headlen(skb
) >= offsetof(struct ethhdr
, h_proto
))
3378 return (data
->h_dest
[5] ^ data
->h_source
[5]) % count
;
3384 * Hash for the output device based upon layer 2 and layer 3 data. If
3385 * the packet is not IP, fall back on bond_xmit_hash_policy_l2()
3387 static int bond_xmit_hash_policy_l23(struct sk_buff
*skb
, int count
)
3389 struct ethhdr
*data
= (struct ethhdr
*)skb
->data
;
3391 struct ipv6hdr
*ipv6h
;
3395 if (skb
->protocol
== htons(ETH_P_IP
) &&
3396 skb_network_header_len(skb
) >= sizeof(*iph
)) {
3398 return ((ntohl(iph
->saddr
^ iph
->daddr
) & 0xffff) ^
3399 (data
->h_dest
[5] ^ data
->h_source
[5])) % count
;
3400 } else if (skb
->protocol
== htons(ETH_P_IPV6
) &&
3401 skb_network_header_len(skb
) >= sizeof(*ipv6h
)) {
3402 ipv6h
= ipv6_hdr(skb
);
3403 s
= &ipv6h
->saddr
.s6_addr32
[0];
3404 d
= &ipv6h
->daddr
.s6_addr32
[0];
3405 v6hash
= (s
[1] ^ d
[1]) ^ (s
[2] ^ d
[2]) ^ (s
[3] ^ d
[3]);
3406 v6hash
^= (v6hash
>> 24) ^ (v6hash
>> 16) ^ (v6hash
>> 8);
3407 return (v6hash
^ data
->h_dest
[5] ^ data
->h_source
[5]) % count
;
3410 return bond_xmit_hash_policy_l2(skb
, count
);
3414 * Hash for the output device based upon layer 3 and layer 4 data. If
3415 * the packet is a frag or not TCP or UDP, just use layer 3 data. If it is
3416 * altogether not IP, fall back on bond_xmit_hash_policy_l2()
3418 static int bond_xmit_hash_policy_l34(struct sk_buff
*skb
, int count
)
3422 struct ipv6hdr
*ipv6h
;
3426 if (skb
->protocol
== htons(ETH_P_IP
) &&
3427 skb_network_header_len(skb
) >= sizeof(*iph
)) {
3429 if (!ip_is_fragment(iph
) &&
3430 (iph
->protocol
== IPPROTO_TCP
||
3431 iph
->protocol
== IPPROTO_UDP
) &&
3432 (skb_headlen(skb
) - skb_network_offset(skb
) >=
3433 iph
->ihl
* sizeof(u32
) + sizeof(*layer4hdr
) * 2)) {
3434 layer4hdr
= (__be16
*)((u32
*)iph
+ iph
->ihl
);
3435 layer4_xor
= ntohs(*layer4hdr
^ *(layer4hdr
+ 1));
3437 return (layer4_xor
^
3438 ((ntohl(iph
->saddr
^ iph
->daddr
)) & 0xffff)) % count
;
3439 } else if (skb
->protocol
== htons(ETH_P_IPV6
) &&
3440 skb_network_header_len(skb
) >= sizeof(*ipv6h
)) {
3441 ipv6h
= ipv6_hdr(skb
);
3442 if ((ipv6h
->nexthdr
== IPPROTO_TCP
||
3443 ipv6h
->nexthdr
== IPPROTO_UDP
) &&
3444 (skb_headlen(skb
) - skb_network_offset(skb
) >=
3445 sizeof(*ipv6h
) + sizeof(*layer4hdr
) * 2)) {
3446 layer4hdr
= (__be16
*)(ipv6h
+ 1);
3447 layer4_xor
= ntohs(*layer4hdr
^ *(layer4hdr
+ 1));
3449 s
= &ipv6h
->saddr
.s6_addr32
[0];
3450 d
= &ipv6h
->daddr
.s6_addr32
[0];
3451 layer4_xor
^= (s
[1] ^ d
[1]) ^ (s
[2] ^ d
[2]) ^ (s
[3] ^ d
[3]);
3452 layer4_xor
^= (layer4_xor
>> 24) ^ (layer4_xor
>> 16) ^
3454 return layer4_xor
% count
;
3457 return bond_xmit_hash_policy_l2(skb
, count
);
3460 /*-------------------------- Device entry points ----------------------------*/
3462 static void bond_work_init_all(struct bonding
*bond
)
3464 INIT_DELAYED_WORK(&bond
->mcast_work
,
3465 bond_resend_igmp_join_requests_delayed
);
3466 INIT_DELAYED_WORK(&bond
->alb_work
, bond_alb_monitor
);
3467 INIT_DELAYED_WORK(&bond
->mii_work
, bond_mii_monitor
);
3468 if (bond
->params
.mode
== BOND_MODE_ACTIVEBACKUP
)
3469 INIT_DELAYED_WORK(&bond
->arp_work
, bond_activebackup_arp_mon
);
3471 INIT_DELAYED_WORK(&bond
->arp_work
, bond_loadbalance_arp_mon
);
3472 INIT_DELAYED_WORK(&bond
->ad_work
, bond_3ad_state_machine_handler
);
3475 static void bond_work_cancel_all(struct bonding
*bond
)
3477 cancel_delayed_work_sync(&bond
->mii_work
);
3478 cancel_delayed_work_sync(&bond
->arp_work
);
3479 cancel_delayed_work_sync(&bond
->alb_work
);
3480 cancel_delayed_work_sync(&bond
->ad_work
);
3481 cancel_delayed_work_sync(&bond
->mcast_work
);
3484 static int bond_open(struct net_device
*bond_dev
)
3486 struct bonding
*bond
= netdev_priv(bond_dev
);
3487 struct slave
*slave
;
3490 /* reset slave->backup and slave->inactive */
3491 read_lock(&bond
->lock
);
3492 if (bond
->slave_cnt
> 0) {
3493 read_lock(&bond
->curr_slave_lock
);
3494 bond_for_each_slave(bond
, slave
, i
) {
3495 if ((bond
->params
.mode
== BOND_MODE_ACTIVEBACKUP
)
3496 && (slave
!= bond
->curr_active_slave
)) {
3497 bond_set_slave_inactive_flags(slave
);
3499 bond_set_slave_active_flags(slave
);
3502 read_unlock(&bond
->curr_slave_lock
);
3504 read_unlock(&bond
->lock
);
3506 bond_work_init_all(bond
);
3508 if (bond_is_lb(bond
)) {
3509 /* bond_alb_initialize must be called before the timer
3512 if (bond_alb_initialize(bond
, (bond
->params
.mode
== BOND_MODE_ALB
)))
3514 queue_delayed_work(bond
->wq
, &bond
->alb_work
, 0);
3517 if (bond
->params
.miimon
) /* link check interval, in milliseconds. */
3518 queue_delayed_work(bond
->wq
, &bond
->mii_work
, 0);
3520 if (bond
->params
.arp_interval
) { /* arp interval, in milliseconds. */
3521 queue_delayed_work(bond
->wq
, &bond
->arp_work
, 0);
3522 if (bond
->params
.arp_validate
)
3523 bond
->recv_probe
= bond_arp_rcv
;
3526 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
3527 queue_delayed_work(bond
->wq
, &bond
->ad_work
, 0);
3528 /* register to receive LACPDUs */
3529 bond
->recv_probe
= bond_3ad_lacpdu_recv
;
3530 bond_3ad_initiate_agg_selection(bond
, 1);
3536 static int bond_close(struct net_device
*bond_dev
)
3538 struct bonding
*bond
= netdev_priv(bond_dev
);
3540 write_lock_bh(&bond
->lock
);
3541 bond
->send_peer_notif
= 0;
3542 write_unlock_bh(&bond
->lock
);
3544 bond_work_cancel_all(bond
);
3545 if (bond_is_lb(bond
)) {
3546 /* Must be called only after all
3547 * slaves have been released
3549 bond_alb_deinitialize(bond
);
3551 bond
->recv_probe
= NULL
;
3556 static struct rtnl_link_stats64
*bond_get_stats(struct net_device
*bond_dev
,
3557 struct rtnl_link_stats64
*stats
)
3559 struct bonding
*bond
= netdev_priv(bond_dev
);
3560 struct rtnl_link_stats64 temp
;
3561 struct slave
*slave
;
3564 memset(stats
, 0, sizeof(*stats
));
3566 read_lock_bh(&bond
->lock
);
3568 bond_for_each_slave(bond
, slave
, i
) {
3569 const struct rtnl_link_stats64
*sstats
=
3570 dev_get_stats(slave
->dev
, &temp
);
3572 stats
->rx_packets
+= sstats
->rx_packets
;
3573 stats
->rx_bytes
+= sstats
->rx_bytes
;
3574 stats
->rx_errors
+= sstats
->rx_errors
;
3575 stats
->rx_dropped
+= sstats
->rx_dropped
;
3577 stats
->tx_packets
+= sstats
->tx_packets
;
3578 stats
->tx_bytes
+= sstats
->tx_bytes
;
3579 stats
->tx_errors
+= sstats
->tx_errors
;
3580 stats
->tx_dropped
+= sstats
->tx_dropped
;
3582 stats
->multicast
+= sstats
->multicast
;
3583 stats
->collisions
+= sstats
->collisions
;
3585 stats
->rx_length_errors
+= sstats
->rx_length_errors
;
3586 stats
->rx_over_errors
+= sstats
->rx_over_errors
;
3587 stats
->rx_crc_errors
+= sstats
->rx_crc_errors
;
3588 stats
->rx_frame_errors
+= sstats
->rx_frame_errors
;
3589 stats
->rx_fifo_errors
+= sstats
->rx_fifo_errors
;
3590 stats
->rx_missed_errors
+= sstats
->rx_missed_errors
;
3592 stats
->tx_aborted_errors
+= sstats
->tx_aborted_errors
;
3593 stats
->tx_carrier_errors
+= sstats
->tx_carrier_errors
;
3594 stats
->tx_fifo_errors
+= sstats
->tx_fifo_errors
;
3595 stats
->tx_heartbeat_errors
+= sstats
->tx_heartbeat_errors
;
3596 stats
->tx_window_errors
+= sstats
->tx_window_errors
;
3599 read_unlock_bh(&bond
->lock
);
3604 static int bond_do_ioctl(struct net_device
*bond_dev
, struct ifreq
*ifr
, int cmd
)
3606 struct net_device
*slave_dev
= NULL
;
3607 struct ifbond k_binfo
;
3608 struct ifbond __user
*u_binfo
= NULL
;
3609 struct ifslave k_sinfo
;
3610 struct ifslave __user
*u_sinfo
= NULL
;
3611 struct mii_ioctl_data
*mii
= NULL
;
3614 pr_debug("bond_ioctl: master=%s, cmd=%d\n", bond_dev
->name
, cmd
);
3626 * We do this again just in case we were called by SIOCGMIIREG
3627 * instead of SIOCGMIIPHY.
3634 if (mii
->reg_num
== 1) {
3635 struct bonding
*bond
= netdev_priv(bond_dev
);
3637 read_lock(&bond
->lock
);
3638 read_lock(&bond
->curr_slave_lock
);
3639 if (netif_carrier_ok(bond
->dev
))
3640 mii
->val_out
= BMSR_LSTATUS
;
3642 read_unlock(&bond
->curr_slave_lock
);
3643 read_unlock(&bond
->lock
);
3647 case BOND_INFO_QUERY_OLD
:
3648 case SIOCBONDINFOQUERY
:
3649 u_binfo
= (struct ifbond __user
*)ifr
->ifr_data
;
3651 if (copy_from_user(&k_binfo
, u_binfo
, sizeof(ifbond
)))
3654 res
= bond_info_query(bond_dev
, &k_binfo
);
3656 copy_to_user(u_binfo
, &k_binfo
, sizeof(ifbond
)))
3660 case BOND_SLAVE_INFO_QUERY_OLD
:
3661 case SIOCBONDSLAVEINFOQUERY
:
3662 u_sinfo
= (struct ifslave __user
*)ifr
->ifr_data
;
3664 if (copy_from_user(&k_sinfo
, u_sinfo
, sizeof(ifslave
)))
3667 res
= bond_slave_info_query(bond_dev
, &k_sinfo
);
3669 copy_to_user(u_sinfo
, &k_sinfo
, sizeof(ifslave
)))
3678 if (!capable(CAP_NET_ADMIN
))
3681 slave_dev
= dev_get_by_name(dev_net(bond_dev
), ifr
->ifr_slave
);
3683 pr_debug("slave_dev=%p:\n", slave_dev
);
3688 pr_debug("slave_dev->name=%s:\n", slave_dev
->name
);
3690 case BOND_ENSLAVE_OLD
:
3691 case SIOCBONDENSLAVE
:
3692 res
= bond_enslave(bond_dev
, slave_dev
);
3694 case BOND_RELEASE_OLD
:
3695 case SIOCBONDRELEASE
:
3696 res
= bond_release(bond_dev
, slave_dev
);
3698 case BOND_SETHWADDR_OLD
:
3699 case SIOCBONDSETHWADDR
:
3700 res
= bond_sethwaddr(bond_dev
, slave_dev
);
3702 case BOND_CHANGE_ACTIVE_OLD
:
3703 case SIOCBONDCHANGEACTIVE
:
3704 res
= bond_ioctl_change_active(bond_dev
, slave_dev
);
3716 static bool bond_addr_in_mc_list(unsigned char *addr
,
3717 struct netdev_hw_addr_list
*list
,
3720 struct netdev_hw_addr
*ha
;
3722 netdev_hw_addr_list_for_each(ha
, list
)
3723 if (!memcmp(ha
->addr
, addr
, addrlen
))
3729 static void bond_change_rx_flags(struct net_device
*bond_dev
, int change
)
3731 struct bonding
*bond
= netdev_priv(bond_dev
);
3733 if (change
& IFF_PROMISC
)
3734 bond_set_promiscuity(bond
,
3735 bond_dev
->flags
& IFF_PROMISC
? 1 : -1);
3737 if (change
& IFF_ALLMULTI
)
3738 bond_set_allmulti(bond
,
3739 bond_dev
->flags
& IFF_ALLMULTI
? 1 : -1);
3742 static void bond_set_multicast_list(struct net_device
*bond_dev
)
3744 struct bonding
*bond
= netdev_priv(bond_dev
);
3745 struct netdev_hw_addr
*ha
;
3748 read_lock(&bond
->lock
);
3750 /* looking for addresses to add to slaves' mc list */
3751 netdev_for_each_mc_addr(ha
, bond_dev
) {
3752 found
= bond_addr_in_mc_list(ha
->addr
, &bond
->mc_list
,
3753 bond_dev
->addr_len
);
3755 bond_mc_add(bond
, ha
->addr
);
3758 /* looking for addresses to delete from slaves' list */
3759 netdev_hw_addr_list_for_each(ha
, &bond
->mc_list
) {
3760 found
= bond_addr_in_mc_list(ha
->addr
, &bond_dev
->mc
,
3761 bond_dev
->addr_len
);
3763 bond_mc_del(bond
, ha
->addr
);
3766 /* save master's multicast list */
3767 __hw_addr_flush(&bond
->mc_list
);
3768 __hw_addr_add_multiple(&bond
->mc_list
, &bond_dev
->mc
,
3769 bond_dev
->addr_len
, NETDEV_HW_ADDR_T_MULTICAST
);
3771 read_unlock(&bond
->lock
);
3774 static int bond_neigh_init(struct neighbour
*n
)
3776 struct bonding
*bond
= netdev_priv(n
->dev
);
3777 struct slave
*slave
= bond
->first_slave
;
3778 const struct net_device_ops
*slave_ops
;
3779 struct neigh_parms parms
;
3785 slave_ops
= slave
->dev
->netdev_ops
;
3787 if (!slave_ops
->ndo_neigh_setup
)
3790 parms
.neigh_setup
= NULL
;
3791 parms
.neigh_cleanup
= NULL
;
3792 ret
= slave_ops
->ndo_neigh_setup(slave
->dev
, &parms
);
3797 * Assign slave's neigh_cleanup to neighbour in case cleanup is called
3798 * after the last slave has been detached. Assumes that all slaves
3799 * utilize the same neigh_cleanup (true at this writing as only user
3802 n
->parms
->neigh_cleanup
= parms
.neigh_cleanup
;
3804 if (!parms
.neigh_setup
)
3807 return parms
.neigh_setup(n
);
3811 * The bonding ndo_neigh_setup is called at init time beofre any
3812 * slave exists. So we must declare proxy setup function which will
3813 * be used at run time to resolve the actual slave neigh param setup.
3815 static int bond_neigh_setup(struct net_device
*dev
,
3816 struct neigh_parms
*parms
)
3818 parms
->neigh_setup
= bond_neigh_init
;
3824 * Change the MTU of all of a master's slaves to match the master
3826 static int bond_change_mtu(struct net_device
*bond_dev
, int new_mtu
)
3828 struct bonding
*bond
= netdev_priv(bond_dev
);
3829 struct slave
*slave
, *stop_at
;
3833 pr_debug("bond=%p, name=%s, new_mtu=%d\n", bond
,
3834 (bond_dev
? bond_dev
->name
: "None"), new_mtu
);
3836 /* Can't hold bond->lock with bh disabled here since
3837 * some base drivers panic. On the other hand we can't
3838 * hold bond->lock without bh disabled because we'll
3839 * deadlock. The only solution is to rely on the fact
3840 * that we're under rtnl_lock here, and the slaves
3841 * list won't change. This doesn't solve the problem
3842 * of setting the slave's MTU while it is
3843 * transmitting, but the assumption is that the base
3844 * driver can handle that.
3846 * TODO: figure out a way to safely iterate the slaves
3847 * list, but without holding a lock around the actual
3848 * call to the base driver.
3851 bond_for_each_slave(bond
, slave
, i
) {
3852 pr_debug("s %p s->p %p c_m %p\n",
3855 slave
->dev
->netdev_ops
->ndo_change_mtu
);
3857 res
= dev_set_mtu(slave
->dev
, new_mtu
);
3860 /* If we failed to set the slave's mtu to the new value
3861 * we must abort the operation even in ACTIVE_BACKUP
3862 * mode, because if we allow the backup slaves to have
3863 * different mtu values than the active slave we'll
3864 * need to change their mtu when doing a failover. That
3865 * means changing their mtu from timer context, which
3866 * is probably not a good idea.
3868 pr_debug("err %d %s\n", res
, slave
->dev
->name
);
3873 bond_dev
->mtu
= new_mtu
;
3878 /* unwind from head to the slave that failed */
3880 bond_for_each_slave_from_to(bond
, slave
, i
, bond
->first_slave
, stop_at
) {
3883 tmp_res
= dev_set_mtu(slave
->dev
, bond_dev
->mtu
);
3885 pr_debug("unwind err %d dev %s\n",
3886 tmp_res
, slave
->dev
->name
);
3896 * Note that many devices must be down to change the HW address, and
3897 * downing the master releases all slaves. We can make bonds full of
3898 * bonding devices to test this, however.
3900 static int bond_set_mac_address(struct net_device
*bond_dev
, void *addr
)
3902 struct bonding
*bond
= netdev_priv(bond_dev
);
3903 struct sockaddr
*sa
= addr
, tmp_sa
;
3904 struct slave
*slave
, *stop_at
;
3908 if (bond
->params
.mode
== BOND_MODE_ALB
)
3909 return bond_alb_set_mac_address(bond_dev
, addr
);
3912 pr_debug("bond=%p, name=%s\n",
3913 bond
, bond_dev
? bond_dev
->name
: "None");
3916 * If fail_over_mac is set to active, do nothing and return
3917 * success. Returning an error causes ifenslave to fail.
3919 if (bond
->params
.fail_over_mac
== BOND_FOM_ACTIVE
)
3922 if (!is_valid_ether_addr(sa
->sa_data
))
3923 return -EADDRNOTAVAIL
;
3925 /* Can't hold bond->lock with bh disabled here since
3926 * some base drivers panic. On the other hand we can't
3927 * hold bond->lock without bh disabled because we'll
3928 * deadlock. The only solution is to rely on the fact
3929 * that we're under rtnl_lock here, and the slaves
3930 * list won't change. This doesn't solve the problem
3931 * of setting the slave's hw address while it is
3932 * transmitting, but the assumption is that the base
3933 * driver can handle that.
3935 * TODO: figure out a way to safely iterate the slaves
3936 * list, but without holding a lock around the actual
3937 * call to the base driver.
3940 bond_for_each_slave(bond
, slave
, i
) {
3941 const struct net_device_ops
*slave_ops
= slave
->dev
->netdev_ops
;
3942 pr_debug("slave %p %s\n", slave
, slave
->dev
->name
);
3944 if (slave_ops
->ndo_set_mac_address
== NULL
) {
3946 pr_debug("EOPNOTSUPP %s\n", slave
->dev
->name
);
3950 res
= dev_set_mac_address(slave
->dev
, addr
);
3952 /* TODO: consider downing the slave
3954 * User should expect communications
3955 * breakage anyway until ARP finish
3958 pr_debug("err %d %s\n", res
, slave
->dev
->name
);
3964 memcpy(bond_dev
->dev_addr
, sa
->sa_data
, bond_dev
->addr_len
);
3968 memcpy(tmp_sa
.sa_data
, bond_dev
->dev_addr
, bond_dev
->addr_len
);
3969 tmp_sa
.sa_family
= bond_dev
->type
;
3971 /* unwind from head to the slave that failed */
3973 bond_for_each_slave_from_to(bond
, slave
, i
, bond
->first_slave
, stop_at
) {
3976 tmp_res
= dev_set_mac_address(slave
->dev
, &tmp_sa
);
3978 pr_debug("unwind err %d dev %s\n",
3979 tmp_res
, slave
->dev
->name
);
3986 static int bond_xmit_roundrobin(struct sk_buff
*skb
, struct net_device
*bond_dev
)
3988 struct bonding
*bond
= netdev_priv(bond_dev
);
3989 struct slave
*slave
, *start_at
;
3990 int i
, slave_no
, res
= 1;
3991 struct iphdr
*iph
= ip_hdr(skb
);
3994 * Start with the curr_active_slave that joined the bond as the
3995 * default for sending IGMP traffic. For failover purposes one
3996 * needs to maintain some consistency for the interface that will
3997 * send the join/membership reports. The curr_active_slave found
3998 * will send all of this type of traffic.
4000 if ((iph
->protocol
== IPPROTO_IGMP
) &&
4001 (skb
->protocol
== htons(ETH_P_IP
))) {
4003 read_lock(&bond
->curr_slave_lock
);
4004 slave
= bond
->curr_active_slave
;
4005 read_unlock(&bond
->curr_slave_lock
);
4011 * Concurrent TX may collide on rr_tx_counter; we accept
4012 * that as being rare enough not to justify using an
4015 slave_no
= bond
->rr_tx_counter
++ % bond
->slave_cnt
;
4017 bond_for_each_slave(bond
, slave
, i
) {
4025 bond_for_each_slave_from(bond
, slave
, i
, start_at
) {
4026 if (IS_UP(slave
->dev
) &&
4027 (slave
->link
== BOND_LINK_UP
) &&
4028 bond_is_active_slave(slave
)) {
4029 res
= bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
4036 /* no suitable interface, frame not sent */
4040 return NETDEV_TX_OK
;
4045 * in active-backup mode, we know that bond->curr_active_slave is always valid if
4046 * the bond has a usable interface.
4048 static int bond_xmit_activebackup(struct sk_buff
*skb
, struct net_device
*bond_dev
)
4050 struct bonding
*bond
= netdev_priv(bond_dev
);
4053 read_lock(&bond
->curr_slave_lock
);
4055 if (bond
->curr_active_slave
)
4056 res
= bond_dev_queue_xmit(bond
, skb
,
4057 bond
->curr_active_slave
->dev
);
4059 read_unlock(&bond
->curr_slave_lock
);
4062 /* no suitable interface, frame not sent */
4065 return NETDEV_TX_OK
;
4069 * In bond_xmit_xor() , we determine the output device by using a pre-
4070 * determined xmit_hash_policy(), If the selected device is not enabled,
4071 * find the next active slave.
4073 static int bond_xmit_xor(struct sk_buff
*skb
, struct net_device
*bond_dev
)
4075 struct bonding
*bond
= netdev_priv(bond_dev
);
4076 struct slave
*slave
, *start_at
;
4081 slave_no
= bond
->xmit_hash_policy(skb
, bond
->slave_cnt
);
4083 bond_for_each_slave(bond
, slave
, i
) {
4091 bond_for_each_slave_from(bond
, slave
, i
, start_at
) {
4092 if (IS_UP(slave
->dev
) &&
4093 (slave
->link
== BOND_LINK_UP
) &&
4094 bond_is_active_slave(slave
)) {
4095 res
= bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
4101 /* no suitable interface, frame not sent */
4105 return NETDEV_TX_OK
;
4109 * in broadcast mode, we send everything to all usable interfaces.
4111 static int bond_xmit_broadcast(struct sk_buff
*skb
, struct net_device
*bond_dev
)
4113 struct bonding
*bond
= netdev_priv(bond_dev
);
4114 struct slave
*slave
, *start_at
;
4115 struct net_device
*tx_dev
= NULL
;
4119 read_lock(&bond
->curr_slave_lock
);
4120 start_at
= bond
->curr_active_slave
;
4121 read_unlock(&bond
->curr_slave_lock
);
4126 bond_for_each_slave_from(bond
, slave
, i
, start_at
) {
4127 if (IS_UP(slave
->dev
) &&
4128 (slave
->link
== BOND_LINK_UP
) &&
4129 bond_is_active_slave(slave
)) {
4131 struct sk_buff
*skb2
= skb_clone(skb
, GFP_ATOMIC
);
4133 pr_err("%s: Error: bond_xmit_broadcast(): skb_clone() failed\n",
4138 res
= bond_dev_queue_xmit(bond
, skb2
, tx_dev
);
4144 tx_dev
= slave
->dev
;
4149 res
= bond_dev_queue_xmit(bond
, skb
, tx_dev
);
4153 /* no suitable interface, frame not sent */
4156 /* frame sent to all suitable interfaces */
4157 return NETDEV_TX_OK
;
4160 /*------------------------- Device initialization ---------------------------*/
4162 static void bond_set_xmit_hash_policy(struct bonding
*bond
)
4164 switch (bond
->params
.xmit_policy
) {
4165 case BOND_XMIT_POLICY_LAYER23
:
4166 bond
->xmit_hash_policy
= bond_xmit_hash_policy_l23
;
4168 case BOND_XMIT_POLICY_LAYER34
:
4169 bond
->xmit_hash_policy
= bond_xmit_hash_policy_l34
;
4171 case BOND_XMIT_POLICY_LAYER2
:
4173 bond
->xmit_hash_policy
= bond_xmit_hash_policy_l2
;
4179 * Lookup the slave that corresponds to a qid
4181 static inline int bond_slave_override(struct bonding
*bond
,
4182 struct sk_buff
*skb
)
4185 struct slave
*slave
= NULL
;
4186 struct slave
*check_slave
;
4188 if (!skb
->queue_mapping
)
4191 /* Find out if any slaves have the same mapping as this skb. */
4192 bond_for_each_slave(bond
, check_slave
, i
) {
4193 if (check_slave
->queue_id
== skb
->queue_mapping
) {
4194 slave
= check_slave
;
4199 /* If the slave isn't UP, use default transmit policy. */
4200 if (slave
&& slave
->queue_id
&& IS_UP(slave
->dev
) &&
4201 (slave
->link
== BOND_LINK_UP
)) {
4202 res
= bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
4209 static u16
bond_select_queue(struct net_device
*dev
, struct sk_buff
*skb
)
4212 * This helper function exists to help dev_pick_tx get the correct
4213 * destination queue. Using a helper function skips a call to
4214 * skb_tx_hash and will put the skbs in the queue we expect on their
4215 * way down to the bonding driver.
4217 u16 txq
= skb_rx_queue_recorded(skb
) ? skb_get_rx_queue(skb
) : 0;
4220 * Save the original txq to restore before passing to the driver
4222 qdisc_skb_cb(skb
)->slave_dev_queue_mapping
= skb
->queue_mapping
;
4224 if (unlikely(txq
>= dev
->real_num_tx_queues
)) {
4226 txq
-= dev
->real_num_tx_queues
;
4227 } while (txq
>= dev
->real_num_tx_queues
);
4232 static netdev_tx_t
__bond_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
4234 struct bonding
*bond
= netdev_priv(dev
);
4236 if (TX_QUEUE_OVERRIDE(bond
->params
.mode
)) {
4237 if (!bond_slave_override(bond
, skb
))
4238 return NETDEV_TX_OK
;
4241 switch (bond
->params
.mode
) {
4242 case BOND_MODE_ROUNDROBIN
:
4243 return bond_xmit_roundrobin(skb
, dev
);
4244 case BOND_MODE_ACTIVEBACKUP
:
4245 return bond_xmit_activebackup(skb
, dev
);
4247 return bond_xmit_xor(skb
, dev
);
4248 case BOND_MODE_BROADCAST
:
4249 return bond_xmit_broadcast(skb
, dev
);
4250 case BOND_MODE_8023AD
:
4251 return bond_3ad_xmit_xor(skb
, dev
);
4254 return bond_alb_xmit(skb
, dev
);
4256 /* Should never happen, mode already checked */
4257 pr_err("%s: Error: Unknown bonding mode %d\n",
4258 dev
->name
, bond
->params
.mode
);
4261 return NETDEV_TX_OK
;
4265 static netdev_tx_t
bond_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
4267 struct bonding
*bond
= netdev_priv(dev
);
4268 netdev_tx_t ret
= NETDEV_TX_OK
;
4271 * If we risk deadlock from transmitting this in the
4272 * netpoll path, tell netpoll to queue the frame for later tx
4274 if (is_netpoll_tx_blocked(dev
))
4275 return NETDEV_TX_BUSY
;
4277 read_lock(&bond
->lock
);
4279 if (bond
->slave_cnt
)
4280 ret
= __bond_start_xmit(skb
, dev
);
4284 read_unlock(&bond
->lock
);
4290 * set bond mode specific net device operations
4292 void bond_set_mode_ops(struct bonding
*bond
, int mode
)
4294 struct net_device
*bond_dev
= bond
->dev
;
4297 case BOND_MODE_ROUNDROBIN
:
4299 case BOND_MODE_ACTIVEBACKUP
:
4302 bond_set_xmit_hash_policy(bond
);
4304 case BOND_MODE_BROADCAST
:
4306 case BOND_MODE_8023AD
:
4307 bond_set_xmit_hash_policy(bond
);
4314 /* Should never happen, mode already checked */
4315 pr_err("%s: Error: Unknown bonding mode %d\n",
4316 bond_dev
->name
, mode
);
4321 static void bond_ethtool_get_drvinfo(struct net_device
*bond_dev
,
4322 struct ethtool_drvinfo
*drvinfo
)
4324 strncpy(drvinfo
->driver
, DRV_NAME
, 32);
4325 strncpy(drvinfo
->version
, DRV_VERSION
, 32);
4326 snprintf(drvinfo
->fw_version
, 32, "%d", BOND_ABI_VERSION
);
4329 static const struct ethtool_ops bond_ethtool_ops
= {
4330 .get_drvinfo
= bond_ethtool_get_drvinfo
,
4331 .get_link
= ethtool_op_get_link
,
4334 static const struct net_device_ops bond_netdev_ops
= {
4335 .ndo_init
= bond_init
,
4336 .ndo_uninit
= bond_uninit
,
4337 .ndo_open
= bond_open
,
4338 .ndo_stop
= bond_close
,
4339 .ndo_start_xmit
= bond_start_xmit
,
4340 .ndo_select_queue
= bond_select_queue
,
4341 .ndo_get_stats64
= bond_get_stats
,
4342 .ndo_do_ioctl
= bond_do_ioctl
,
4343 .ndo_change_rx_flags
= bond_change_rx_flags
,
4344 .ndo_set_rx_mode
= bond_set_multicast_list
,
4345 .ndo_change_mtu
= bond_change_mtu
,
4346 .ndo_set_mac_address
= bond_set_mac_address
,
4347 .ndo_neigh_setup
= bond_neigh_setup
,
4348 .ndo_vlan_rx_add_vid
= bond_vlan_rx_add_vid
,
4349 .ndo_vlan_rx_kill_vid
= bond_vlan_rx_kill_vid
,
4350 #ifdef CONFIG_NET_POLL_CONTROLLER
4351 .ndo_netpoll_setup
= bond_netpoll_setup
,
4352 .ndo_netpoll_cleanup
= bond_netpoll_cleanup
,
4353 .ndo_poll_controller
= bond_poll_controller
,
4355 .ndo_add_slave
= bond_enslave
,
4356 .ndo_del_slave
= bond_release
,
4357 .ndo_fix_features
= bond_fix_features
,
4360 static void bond_destructor(struct net_device
*bond_dev
)
4362 struct bonding
*bond
= netdev_priv(bond_dev
);
4364 destroy_workqueue(bond
->wq
);
4365 free_netdev(bond_dev
);
4368 static void bond_setup(struct net_device
*bond_dev
)
4370 struct bonding
*bond
= netdev_priv(bond_dev
);
4372 /* initialize rwlocks */
4373 rwlock_init(&bond
->lock
);
4374 rwlock_init(&bond
->curr_slave_lock
);
4376 bond
->params
= bonding_defaults
;
4378 /* Initialize pointers */
4379 bond
->dev
= bond_dev
;
4380 INIT_LIST_HEAD(&bond
->vlan_list
);
4382 /* Initialize the device entry points */
4383 ether_setup(bond_dev
);
4384 bond_dev
->netdev_ops
= &bond_netdev_ops
;
4385 bond_dev
->ethtool_ops
= &bond_ethtool_ops
;
4386 bond_set_mode_ops(bond
, bond
->params
.mode
);
4388 bond_dev
->destructor
= bond_destructor
;
4390 /* Initialize the device options */
4391 bond_dev
->tx_queue_len
= 0;
4392 bond_dev
->flags
|= IFF_MASTER
|IFF_MULTICAST
;
4393 bond_dev
->priv_flags
|= IFF_BONDING
;
4394 bond_dev
->priv_flags
&= ~(IFF_XMIT_DST_RELEASE
| IFF_TX_SKB_SHARING
);
4396 /* At first, we block adding VLANs. That's the only way to
4397 * prevent problems that occur when adding VLANs over an
4398 * empty bond. The block will be removed once non-challenged
4399 * slaves are enslaved.
4401 bond_dev
->features
|= NETIF_F_VLAN_CHALLENGED
;
4403 /* don't acquire bond device's netif_tx_lock when
4405 bond_dev
->features
|= NETIF_F_LLTX
;
4407 /* By default, we declare the bond to be fully
4408 * VLAN hardware accelerated capable. Special
4409 * care is taken in the various xmit functions
4410 * when there are slaves that are not hw accel
4414 bond_dev
->hw_features
= BOND_VLAN_FEATURES
|
4415 NETIF_F_HW_VLAN_TX
|
4416 NETIF_F_HW_VLAN_RX
|
4417 NETIF_F_HW_VLAN_FILTER
;
4419 bond_dev
->hw_features
&= ~(NETIF_F_ALL_CSUM
& ~NETIF_F_HW_CSUM
);
4420 bond_dev
->features
|= bond_dev
->hw_features
;
4424 * Destroy a bonding device.
4425 * Must be under rtnl_lock when this function is called.
4427 static void bond_uninit(struct net_device
*bond_dev
)
4429 struct bonding
*bond
= netdev_priv(bond_dev
);
4430 struct vlan_entry
*vlan
, *tmp
;
4432 bond_netpoll_cleanup(bond_dev
);
4434 /* Release the bonded slaves */
4435 bond_release_all(bond_dev
);
4437 list_del(&bond
->bond_list
);
4439 bond_work_cancel_all(bond
);
4441 bond_debug_unregister(bond
);
4443 __hw_addr_flush(&bond
->mc_list
);
4445 list_for_each_entry_safe(vlan
, tmp
, &bond
->vlan_list
, vlan_list
) {
4446 list_del(&vlan
->vlan_list
);
4451 /*------------------------- Module initialization ---------------------------*/
4454 * Convert string input module parms. Accept either the
4455 * number of the mode or its string name. A bit complicated because
4456 * some mode names are substrings of other names, and calls from sysfs
4457 * may have whitespace in the name (trailing newlines, for example).
4459 int bond_parse_parm(const char *buf
, const struct bond_parm_tbl
*tbl
)
4461 int modeint
= -1, i
, rv
;
4462 char *p
, modestr
[BOND_MAX_MODENAME_LEN
+ 1] = { 0, };
4464 for (p
= (char *)buf
; *p
; p
++)
4465 if (!(isdigit(*p
) || isspace(*p
)))
4469 rv
= sscanf(buf
, "%20s", modestr
);
4471 rv
= sscanf(buf
, "%d", &modeint
);
4476 for (i
= 0; tbl
[i
].modename
; i
++) {
4477 if (modeint
== tbl
[i
].mode
)
4479 if (strcmp(modestr
, tbl
[i
].modename
) == 0)
4486 static int bond_check_params(struct bond_params
*params
)
4488 int arp_validate_value
, fail_over_mac_value
, primary_reselect_value
;
4491 * Convert string parameters.
4494 bond_mode
= bond_parse_parm(mode
, bond_mode_tbl
);
4495 if (bond_mode
== -1) {
4496 pr_err("Error: Invalid bonding mode \"%s\"\n",
4497 mode
== NULL
? "NULL" : mode
);
4502 if (xmit_hash_policy
) {
4503 if ((bond_mode
!= BOND_MODE_XOR
) &&
4504 (bond_mode
!= BOND_MODE_8023AD
)) {
4505 pr_info("xmit_hash_policy param is irrelevant in mode %s\n",
4506 bond_mode_name(bond_mode
));
4508 xmit_hashtype
= bond_parse_parm(xmit_hash_policy
,
4510 if (xmit_hashtype
== -1) {
4511 pr_err("Error: Invalid xmit_hash_policy \"%s\"\n",
4512 xmit_hash_policy
== NULL
? "NULL" :
4520 if (bond_mode
!= BOND_MODE_8023AD
) {
4521 pr_info("lacp_rate param is irrelevant in mode %s\n",
4522 bond_mode_name(bond_mode
));
4524 lacp_fast
= bond_parse_parm(lacp_rate
, bond_lacp_tbl
);
4525 if (lacp_fast
== -1) {
4526 pr_err("Error: Invalid lacp rate \"%s\"\n",
4527 lacp_rate
== NULL
? "NULL" : lacp_rate
);
4534 params
->ad_select
= bond_parse_parm(ad_select
, ad_select_tbl
);
4535 if (params
->ad_select
== -1) {
4536 pr_err("Error: Invalid ad_select \"%s\"\n",
4537 ad_select
== NULL
? "NULL" : ad_select
);
4541 if (bond_mode
!= BOND_MODE_8023AD
) {
4542 pr_warning("ad_select param only affects 802.3ad mode\n");
4545 params
->ad_select
= BOND_AD_STABLE
;
4548 if (max_bonds
< 0) {
4549 pr_warning("Warning: max_bonds (%d) not in range %d-%d, so it was reset to BOND_DEFAULT_MAX_BONDS (%d)\n",
4550 max_bonds
, 0, INT_MAX
, BOND_DEFAULT_MAX_BONDS
);
4551 max_bonds
= BOND_DEFAULT_MAX_BONDS
;
4555 pr_warning("Warning: miimon module parameter (%d), not in range 0-%d, so it was reset to %d\n",
4556 miimon
, INT_MAX
, BOND_LINK_MON_INTERV
);
4557 miimon
= BOND_LINK_MON_INTERV
;
4561 pr_warning("Warning: updelay module parameter (%d), not in range 0-%d, so it was reset to 0\n",
4566 if (downdelay
< 0) {
4567 pr_warning("Warning: downdelay module parameter (%d), not in range 0-%d, so it was reset to 0\n",
4568 downdelay
, INT_MAX
);
4572 if ((use_carrier
!= 0) && (use_carrier
!= 1)) {
4573 pr_warning("Warning: use_carrier module parameter (%d), not of valid value (0/1), so it was set to 1\n",
4578 if (num_peer_notif
< 0 || num_peer_notif
> 255) {
4579 pr_warning("Warning: num_grat_arp/num_unsol_na (%d) not in range 0-255 so it was reset to 1\n",
4584 /* reset values for 802.3ad */
4585 if (bond_mode
== BOND_MODE_8023AD
) {
4587 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");
4588 pr_warning("Forcing miimon to 100msec\n");
4593 if (tx_queues
< 1 || tx_queues
> 255) {
4594 pr_warning("Warning: tx_queues (%d) should be between "
4595 "1 and 255, resetting to %d\n",
4596 tx_queues
, BOND_DEFAULT_TX_QUEUES
);
4597 tx_queues
= BOND_DEFAULT_TX_QUEUES
;
4600 if ((all_slaves_active
!= 0) && (all_slaves_active
!= 1)) {
4601 pr_warning("Warning: all_slaves_active module parameter (%d), "
4602 "not of valid value (0/1), so it was set to "
4603 "0\n", all_slaves_active
);
4604 all_slaves_active
= 0;
4607 if (resend_igmp
< 0 || resend_igmp
> 255) {
4608 pr_warning("Warning: resend_igmp (%d) should be between "
4609 "0 and 255, resetting to %d\n",
4610 resend_igmp
, BOND_DEFAULT_RESEND_IGMP
);
4611 resend_igmp
= BOND_DEFAULT_RESEND_IGMP
;
4614 /* reset values for TLB/ALB */
4615 if ((bond_mode
== BOND_MODE_TLB
) ||
4616 (bond_mode
== BOND_MODE_ALB
)) {
4618 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");
4619 pr_warning("Forcing miimon to 100msec\n");
4624 if (bond_mode
== BOND_MODE_ALB
) {
4625 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",
4630 if (updelay
|| downdelay
) {
4631 /* just warn the user the up/down delay will have
4632 * no effect since miimon is zero...
4634 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",
4635 updelay
, downdelay
);
4638 /* don't allow arp monitoring */
4640 pr_warning("Warning: miimon (%d) and arp_interval (%d) can't be used simultaneously, disabling ARP monitoring\n",
4641 miimon
, arp_interval
);
4645 if ((updelay
% miimon
) != 0) {
4646 pr_warning("Warning: updelay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
4648 (updelay
/ miimon
) * miimon
);
4653 if ((downdelay
% miimon
) != 0) {
4654 pr_warning("Warning: downdelay (%d) is not a multiple of miimon (%d), downdelay rounded to %d ms\n",
4656 (downdelay
/ miimon
) * miimon
);
4659 downdelay
/= miimon
;
4662 if (arp_interval
< 0) {
4663 pr_warning("Warning: arp_interval module parameter (%d) , not in range 0-%d, so it was reset to %d\n",
4664 arp_interval
, INT_MAX
, BOND_LINK_ARP_INTERV
);
4665 arp_interval
= BOND_LINK_ARP_INTERV
;
4668 for (arp_ip_count
= 0;
4669 (arp_ip_count
< BOND_MAX_ARP_TARGETS
) && arp_ip_target
[arp_ip_count
];
4671 /* not complete check, but should be good enough to
4673 __be32 ip
= in_aton(arp_ip_target
[arp_ip_count
]);
4674 if (!isdigit(arp_ip_target
[arp_ip_count
][0]) ||
4675 ip
== 0 || ip
== htonl(INADDR_BROADCAST
)) {
4676 pr_warning("Warning: bad arp_ip_target module parameter (%s), ARP monitoring will not be performed\n",
4677 arp_ip_target
[arp_ip_count
]);
4680 arp_target
[arp_ip_count
] = ip
;
4684 if (arp_interval
&& !arp_ip_count
) {
4685 /* don't allow arping if no arp_ip_target given... */
4686 pr_warning("Warning: arp_interval module parameter (%d) specified without providing an arp_ip_target parameter, arp_interval was reset to 0\n",
4692 if (bond_mode
!= BOND_MODE_ACTIVEBACKUP
) {
4693 pr_err("arp_validate only supported in active-backup mode\n");
4696 if (!arp_interval
) {
4697 pr_err("arp_validate requires arp_interval\n");
4701 arp_validate_value
= bond_parse_parm(arp_validate
,
4703 if (arp_validate_value
== -1) {
4704 pr_err("Error: invalid arp_validate \"%s\"\n",
4705 arp_validate
== NULL
? "NULL" : arp_validate
);
4709 arp_validate_value
= 0;
4712 pr_info("MII link monitoring set to %d ms\n", miimon
);
4713 } else if (arp_interval
) {
4716 pr_info("ARP monitoring set to %d ms, validate %s, with %d target(s):",
4718 arp_validate_tbl
[arp_validate_value
].modename
,
4721 for (i
= 0; i
< arp_ip_count
; i
++)
4722 pr_info(" %s", arp_ip_target
[i
]);
4726 } else if (max_bonds
) {
4727 /* miimon and arp_interval not set, we need one so things
4728 * work as expected, see bonding.txt for details
4730 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");
4733 if (primary
&& !USES_PRIMARY(bond_mode
)) {
4734 /* currently, using a primary only makes sense
4735 * in active backup, TLB or ALB modes
4737 pr_warning("Warning: %s primary device specified but has no effect in %s mode\n",
4738 primary
, bond_mode_name(bond_mode
));
4742 if (primary
&& primary_reselect
) {
4743 primary_reselect_value
= bond_parse_parm(primary_reselect
,
4745 if (primary_reselect_value
== -1) {
4746 pr_err("Error: Invalid primary_reselect \"%s\"\n",
4748 NULL
? "NULL" : primary_reselect
);
4752 primary_reselect_value
= BOND_PRI_RESELECT_ALWAYS
;
4755 if (fail_over_mac
) {
4756 fail_over_mac_value
= bond_parse_parm(fail_over_mac
,
4758 if (fail_over_mac_value
== -1) {
4759 pr_err("Error: invalid fail_over_mac \"%s\"\n",
4760 arp_validate
== NULL
? "NULL" : arp_validate
);
4764 if (bond_mode
!= BOND_MODE_ACTIVEBACKUP
)
4765 pr_warning("Warning: fail_over_mac only affects active-backup mode.\n");
4767 fail_over_mac_value
= BOND_FOM_NONE
;
4770 /* fill params struct with the proper values */
4771 params
->mode
= bond_mode
;
4772 params
->xmit_policy
= xmit_hashtype
;
4773 params
->miimon
= miimon
;
4774 params
->num_peer_notif
= num_peer_notif
;
4775 params
->arp_interval
= arp_interval
;
4776 params
->arp_validate
= arp_validate_value
;
4777 params
->updelay
= updelay
;
4778 params
->downdelay
= downdelay
;
4779 params
->use_carrier
= use_carrier
;
4780 params
->lacp_fast
= lacp_fast
;
4781 params
->primary
[0] = 0;
4782 params
->primary_reselect
= primary_reselect_value
;
4783 params
->fail_over_mac
= fail_over_mac_value
;
4784 params
->tx_queues
= tx_queues
;
4785 params
->all_slaves_active
= all_slaves_active
;
4786 params
->resend_igmp
= resend_igmp
;
4787 params
->min_links
= min_links
;
4790 strncpy(params
->primary
, primary
, IFNAMSIZ
);
4791 params
->primary
[IFNAMSIZ
- 1] = 0;
4794 memcpy(params
->arp_targets
, arp_target
, sizeof(arp_target
));
4799 static struct lock_class_key bonding_netdev_xmit_lock_key
;
4800 static struct lock_class_key bonding_netdev_addr_lock_key
;
4801 static struct lock_class_key bonding_tx_busylock_key
;
4803 static void bond_set_lockdep_class_one(struct net_device
*dev
,
4804 struct netdev_queue
*txq
,
4807 lockdep_set_class(&txq
->_xmit_lock
,
4808 &bonding_netdev_xmit_lock_key
);
4811 static void bond_set_lockdep_class(struct net_device
*dev
)
4813 lockdep_set_class(&dev
->addr_list_lock
,
4814 &bonding_netdev_addr_lock_key
);
4815 netdev_for_each_tx_queue(dev
, bond_set_lockdep_class_one
, NULL
);
4816 dev
->qdisc_tx_busylock
= &bonding_tx_busylock_key
;
4820 * Called from registration process
4822 static int bond_init(struct net_device
*bond_dev
)
4824 struct bonding
*bond
= netdev_priv(bond_dev
);
4825 struct bond_net
*bn
= net_generic(dev_net(bond_dev
), bond_net_id
);
4826 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
4828 pr_debug("Begin bond_init for %s\n", bond_dev
->name
);
4831 * Initialize locks that may be required during
4832 * en/deslave operations. All of the bond_open work
4833 * (of which this is part) should really be moved to
4834 * a phase prior to dev_open
4836 spin_lock_init(&(bond_info
->tx_hashtbl_lock
));
4837 spin_lock_init(&(bond_info
->rx_hashtbl_lock
));
4839 bond
->wq
= create_singlethread_workqueue(bond_dev
->name
);
4843 bond_set_lockdep_class(bond_dev
);
4845 list_add_tail(&bond
->bond_list
, &bn
->dev_list
);
4847 bond_prepare_sysfs_group(bond
);
4849 bond_debug_register(bond
);
4851 __hw_addr_init(&bond
->mc_list
);
4855 static int bond_validate(struct nlattr
*tb
[], struct nlattr
*data
[])
4857 if (tb
[IFLA_ADDRESS
]) {
4858 if (nla_len(tb
[IFLA_ADDRESS
]) != ETH_ALEN
)
4860 if (!is_valid_ether_addr(nla_data(tb
[IFLA_ADDRESS
])))
4861 return -EADDRNOTAVAIL
;
4866 static unsigned int bond_get_num_tx_queues(void)
4871 static struct rtnl_link_ops bond_link_ops __read_mostly
= {
4873 .priv_size
= sizeof(struct bonding
),
4874 .setup
= bond_setup
,
4875 .validate
= bond_validate
,
4876 .get_num_tx_queues
= bond_get_num_tx_queues
,
4877 .get_num_rx_queues
= bond_get_num_tx_queues
, /* Use the same number
4881 /* Create a new bond based on the specified name and bonding parameters.
4882 * If name is NULL, obtain a suitable "bond%d" name for us.
4883 * Caller must NOT hold rtnl_lock; we need to release it here before we
4884 * set up our sysfs entries.
4886 int bond_create(struct net
*net
, const char *name
)
4888 struct net_device
*bond_dev
;
4893 bond_dev
= alloc_netdev_mq(sizeof(struct bonding
),
4894 name
? name
: "bond%d",
4895 bond_setup
, tx_queues
);
4897 pr_err("%s: eek! can't alloc netdev!\n", name
);
4902 dev_net_set(bond_dev
, net
);
4903 bond_dev
->rtnl_link_ops
= &bond_link_ops
;
4905 res
= register_netdevice(bond_dev
);
4907 netif_carrier_off(bond_dev
);
4911 bond_destructor(bond_dev
);
4915 static int __net_init
bond_net_init(struct net
*net
)
4917 struct bond_net
*bn
= net_generic(net
, bond_net_id
);
4920 INIT_LIST_HEAD(&bn
->dev_list
);
4922 bond_create_proc_dir(bn
);
4923 bond_create_sysfs(bn
);
4928 static void __net_exit
bond_net_exit(struct net
*net
)
4930 struct bond_net
*bn
= net_generic(net
, bond_net_id
);
4932 bond_destroy_sysfs(bn
);
4933 bond_destroy_proc_dir(bn
);
4936 static struct pernet_operations bond_net_ops
= {
4937 .init
= bond_net_init
,
4938 .exit
= bond_net_exit
,
4940 .size
= sizeof(struct bond_net
),
4943 static int __init
bonding_init(void)
4948 pr_info("%s", bond_version
);
4950 res
= bond_check_params(&bonding_defaults
);
4954 res
= register_pernet_subsys(&bond_net_ops
);
4958 res
= rtnl_link_register(&bond_link_ops
);
4962 bond_create_debugfs();
4964 for (i
= 0; i
< max_bonds
; i
++) {
4965 res
= bond_create(&init_net
, NULL
);
4970 register_netdevice_notifier(&bond_netdev_notifier
);
4974 rtnl_link_unregister(&bond_link_ops
);
4976 unregister_pernet_subsys(&bond_net_ops
);
4981 static void __exit
bonding_exit(void)
4983 unregister_netdevice_notifier(&bond_netdev_notifier
);
4985 bond_destroy_debugfs();
4987 rtnl_link_unregister(&bond_link_ops
);
4988 unregister_pernet_subsys(&bond_net_ops
);
4990 #ifdef CONFIG_NET_POLL_CONTROLLER
4992 * Make sure we don't have an imbalance on our netpoll blocking
4994 WARN_ON(atomic_read(&netpoll_block_tx
));
4998 module_init(bonding_init
);
4999 module_exit(bonding_exit
);
5000 MODULE_LICENSE("GPL");
5001 MODULE_VERSION(DRV_VERSION
);
5002 MODULE_DESCRIPTION(DRV_DESCRIPTION
", v" DRV_VERSION
);
5003 MODULE_AUTHOR("Thomas Davis, tadavis@lbl.gov and many others");
5004 MODULE_ALIAS_RTNL_LINK("bond");