2 * originally based on the dummy device.
4 * Copyright 1999, Thomas Davis, tadavis@lbl.gov.
5 * Licensed under the GPL. Based on dummy.c, and eql.c devices.
7 * bonding.c: an Ethernet Bonding driver
9 * This is useful to talk to a Cisco EtherChannel compatible equipment:
11 * Sun Trunking (Solaris)
12 * Alteon AceDirector Trunks
14 * and probably many L2 switches ...
17 * ifconfig bond0 ipaddress netmask up
18 * will setup a network device, with an ip address. No mac address
19 * will be assigned at this time. The hw mac address will come from
20 * the first slave bonded to the channel. All slaves will then use
21 * this hw mac address.
24 * will release all slaves, marking them as down.
26 * ifenslave bond0 eth0
27 * will attach eth0 to bond0 as a slave. eth0 hw mac address will either
28 * a: be used as initial mac address
29 * b: if a hw mac address already is there, eth0's hw mac address
30 * will then be set from bond0.
34 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
36 #include <linux/kernel.h>
37 #include <linux/module.h>
38 #include <linux/types.h>
39 #include <linux/fcntl.h>
40 #include <linux/interrupt.h>
41 #include <linux/ptrace.h>
42 #include <linux/ioport.h>
46 #include <linux/tcp.h>
47 #include <linux/udp.h>
48 #include <linux/slab.h>
49 #include <linux/string.h>
50 #include <linux/init.h>
51 #include <linux/timer.h>
52 #include <linux/socket.h>
53 #include <linux/ctype.h>
54 #include <linux/inet.h>
55 #include <linux/bitops.h>
57 #include <asm/system.h>
59 #include <linux/uaccess.h>
60 #include <linux/errno.h>
61 #include <linux/netdevice.h>
62 #include <linux/inetdevice.h>
63 #include <linux/igmp.h>
64 #include <linux/etherdevice.h>
65 #include <linux/skbuff.h>
67 #include <linux/rtnetlink.h>
68 #include <linux/smp.h>
69 #include <linux/if_ether.h>
71 #include <linux/mii.h>
72 #include <linux/ethtool.h>
73 #include <linux/if_vlan.h>
74 #include <linux/if_bonding.h>
75 #include <linux/jiffies.h>
76 #include <linux/preempt.h>
77 #include <net/route.h>
78 #include <net/net_namespace.h>
79 #include <net/netns/generic.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
);
385 #define bond_queue_mapping(skb) (*(u16 *)((skb)->cb))
388 * bond_dev_queue_xmit - Prepare skb for xmit.
390 * @bond: bond device that got this skb for tx.
391 * @skb: hw accel VLAN tagged skb to transmit
392 * @slave_dev: slave that is supposed to xmit this skbuff
394 int bond_dev_queue_xmit(struct bonding
*bond
, struct sk_buff
*skb
,
395 struct net_device
*slave_dev
)
397 skb
->dev
= slave_dev
;
399 skb
->queue_mapping
= bond_queue_mapping(skb
);
401 if (unlikely(netpoll_tx_running(slave_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 void bond_vlan_rx_add_vid(struct net_device
*bond_dev
, uint16_t vid
)
433 struct bonding
*bond
= netdev_priv(bond_dev
);
437 bond_for_each_slave(bond
, slave
, i
) {
438 struct net_device
*slave_dev
= slave
->dev
;
439 const struct net_device_ops
*slave_ops
= slave_dev
->netdev_ops
;
441 if ((slave_dev
->features
& NETIF_F_HW_VLAN_FILTER
) &&
442 slave_ops
->ndo_vlan_rx_add_vid
) {
443 slave_ops
->ndo_vlan_rx_add_vid(slave_dev
, vid
);
447 res
= bond_add_vlan(bond
, vid
);
449 pr_err("%s: Error: Failed to add vlan id %d\n",
450 bond_dev
->name
, vid
);
455 * bond_vlan_rx_kill_vid - Propagates deleting an id to slaves
456 * @bond_dev: bonding net device that got called
457 * @vid: vlan id being removed
459 static void bond_vlan_rx_kill_vid(struct net_device
*bond_dev
, uint16_t vid
)
461 struct bonding
*bond
= netdev_priv(bond_dev
);
465 bond_for_each_slave(bond
, slave
, i
) {
466 struct net_device
*slave_dev
= slave
->dev
;
467 const struct net_device_ops
*slave_ops
= slave_dev
->netdev_ops
;
469 if ((slave_dev
->features
& NETIF_F_HW_VLAN_FILTER
) &&
470 slave_ops
->ndo_vlan_rx_kill_vid
) {
471 slave_ops
->ndo_vlan_rx_kill_vid(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
);
482 static void bond_add_vlans_on_slave(struct bonding
*bond
, struct net_device
*slave_dev
)
484 struct vlan_entry
*vlan
;
485 const struct net_device_ops
*slave_ops
= slave_dev
->netdev_ops
;
487 if (!(slave_dev
->features
& NETIF_F_HW_VLAN_FILTER
) ||
488 !(slave_ops
->ndo_vlan_rx_add_vid
))
491 list_for_each_entry(vlan
, &bond
->vlan_list
, vlan_list
)
492 slave_ops
->ndo_vlan_rx_add_vid(slave_dev
, vlan
->vlan_id
);
495 static void bond_del_vlans_from_slave(struct bonding
*bond
,
496 struct net_device
*slave_dev
)
498 const struct net_device_ops
*slave_ops
= slave_dev
->netdev_ops
;
499 struct vlan_entry
*vlan
;
501 if (!(slave_dev
->features
& NETIF_F_HW_VLAN_FILTER
) ||
502 !(slave_ops
->ndo_vlan_rx_kill_vid
))
505 list_for_each_entry(vlan
, &bond
->vlan_list
, vlan_list
) {
508 slave_ops
->ndo_vlan_rx_kill_vid(slave_dev
, vlan
->vlan_id
);
512 /*------------------------------- Link status -------------------------------*/
515 * Set the carrier state for the master according to the state of its
516 * slaves. If any slaves are up, the master is up. In 802.3ad mode,
517 * do special 802.3ad magic.
519 * Returns zero if carrier state does not change, nonzero if it does.
521 static int bond_set_carrier(struct bonding
*bond
)
526 if (bond
->slave_cnt
== 0)
529 if (bond
->params
.mode
== BOND_MODE_8023AD
)
530 return bond_3ad_set_carrier(bond
);
532 bond_for_each_slave(bond
, slave
, i
) {
533 if (slave
->link
== BOND_LINK_UP
) {
534 if (!netif_carrier_ok(bond
->dev
)) {
535 netif_carrier_on(bond
->dev
);
543 if (netif_carrier_ok(bond
->dev
)) {
544 netif_carrier_off(bond
->dev
);
551 * Get link speed and duplex from the slave's base driver
552 * using ethtool. If for some reason the call fails or the
553 * values are invalid, set speed and duplex to -1,
556 static int bond_update_speed_duplex(struct slave
*slave
)
558 struct net_device
*slave_dev
= slave
->dev
;
559 struct ethtool_cmd ecmd
;
563 slave
->speed
= SPEED_UNKNOWN
;
564 slave
->duplex
= DUPLEX_UNKNOWN
;
566 res
= __ethtool_get_settings(slave_dev
, &ecmd
);
570 slave_speed
= ethtool_cmd_speed(&ecmd
);
571 if (slave_speed
== 0 || slave_speed
== ((__u32
) -1))
574 switch (ecmd
.duplex
) {
582 slave
->speed
= slave_speed
;
583 slave
->duplex
= ecmd
.duplex
;
589 * if <dev> supports MII link status reporting, check its link status.
591 * We either do MII/ETHTOOL ioctls, or check netif_carrier_ok(),
592 * depending upon the setting of the use_carrier parameter.
594 * Return either BMSR_LSTATUS, meaning that the link is up (or we
595 * can't tell and just pretend it is), or 0, meaning that the link is
598 * If reporting is non-zero, instead of faking link up, return -1 if
599 * both ETHTOOL and MII ioctls fail (meaning the device does not
600 * support them). If use_carrier is set, return whatever it says.
601 * It'd be nice if there was a good way to tell if a driver supports
602 * netif_carrier, but there really isn't.
604 static int bond_check_dev_link(struct bonding
*bond
,
605 struct net_device
*slave_dev
, int reporting
)
607 const struct net_device_ops
*slave_ops
= slave_dev
->netdev_ops
;
608 int (*ioctl
)(struct net_device
*, struct ifreq
*, int);
610 struct mii_ioctl_data
*mii
;
612 if (!reporting
&& !netif_running(slave_dev
))
615 if (bond
->params
.use_carrier
)
616 return netif_carrier_ok(slave_dev
) ? BMSR_LSTATUS
: 0;
618 /* Try to get link status using Ethtool first. */
619 if (slave_dev
->ethtool_ops
) {
620 if (slave_dev
->ethtool_ops
->get_link
) {
623 link
= slave_dev
->ethtool_ops
->get_link(slave_dev
);
625 return link
? BMSR_LSTATUS
: 0;
629 /* Ethtool can't be used, fallback to MII ioctls. */
630 ioctl
= slave_ops
->ndo_do_ioctl
;
632 /* TODO: set pointer to correct ioctl on a per team member */
633 /* bases to make this more efficient. that is, once */
634 /* we determine the correct ioctl, we will always */
635 /* call it and not the others for that team */
639 * We cannot assume that SIOCGMIIPHY will also read a
640 * register; not all network drivers (e.g., e100)
644 /* Yes, the mii is overlaid on the ifreq.ifr_ifru */
645 strncpy(ifr
.ifr_name
, slave_dev
->name
, IFNAMSIZ
);
647 if (IOCTL(slave_dev
, &ifr
, SIOCGMIIPHY
) == 0) {
648 mii
->reg_num
= MII_BMSR
;
649 if (IOCTL(slave_dev
, &ifr
, SIOCGMIIREG
) == 0)
650 return mii
->val_out
& BMSR_LSTATUS
;
655 * If reporting, report that either there's no dev->do_ioctl,
656 * or both SIOCGMIIREG and get_link failed (meaning that we
657 * cannot report link status). If not reporting, pretend
660 return reporting
? -1 : BMSR_LSTATUS
;
663 /*----------------------------- Multicast list ------------------------------*/
666 * Push the promiscuity flag down to appropriate slaves
668 static int bond_set_promiscuity(struct bonding
*bond
, int inc
)
671 if (USES_PRIMARY(bond
->params
.mode
)) {
672 /* write lock already acquired */
673 if (bond
->curr_active_slave
) {
674 err
= dev_set_promiscuity(bond
->curr_active_slave
->dev
,
680 bond_for_each_slave(bond
, slave
, i
) {
681 err
= dev_set_promiscuity(slave
->dev
, inc
);
690 * Push the allmulti flag down to all slaves
692 static int bond_set_allmulti(struct bonding
*bond
, int inc
)
695 if (USES_PRIMARY(bond
->params
.mode
)) {
696 /* write lock already acquired */
697 if (bond
->curr_active_slave
) {
698 err
= dev_set_allmulti(bond
->curr_active_slave
->dev
,
704 bond_for_each_slave(bond
, slave
, i
) {
705 err
= dev_set_allmulti(slave
->dev
, inc
);
714 * Add a Multicast address to slaves
717 static void bond_mc_add(struct bonding
*bond
, void *addr
)
719 if (USES_PRIMARY(bond
->params
.mode
)) {
720 /* write lock already acquired */
721 if (bond
->curr_active_slave
)
722 dev_mc_add(bond
->curr_active_slave
->dev
, addr
);
727 bond_for_each_slave(bond
, slave
, i
)
728 dev_mc_add(slave
->dev
, addr
);
733 * Remove a multicast address from slave
736 static void bond_mc_del(struct bonding
*bond
, void *addr
)
738 if (USES_PRIMARY(bond
->params
.mode
)) {
739 /* write lock already acquired */
740 if (bond
->curr_active_slave
)
741 dev_mc_del(bond
->curr_active_slave
->dev
, addr
);
745 bond_for_each_slave(bond
, slave
, i
) {
746 dev_mc_del(slave
->dev
, addr
);
752 static void __bond_resend_igmp_join_requests(struct net_device
*dev
)
754 struct in_device
*in_dev
;
757 in_dev
= __in_dev_get_rcu(dev
);
759 ip_mc_rejoin_groups(in_dev
);
764 * Retrieve the list of registered multicast addresses for the bonding
765 * device and retransmit an IGMP JOIN request to the current active
768 static void bond_resend_igmp_join_requests(struct bonding
*bond
)
770 struct net_device
*vlan_dev
;
771 struct vlan_entry
*vlan
;
773 read_lock(&bond
->lock
);
775 /* rejoin all groups on bond device */
776 __bond_resend_igmp_join_requests(bond
->dev
);
778 /* rejoin all groups on vlan devices */
779 list_for_each_entry(vlan
, &bond
->vlan_list
, vlan_list
) {
781 vlan_dev
= __vlan_find_dev_deep(bond
->dev
,
785 __bond_resend_igmp_join_requests(vlan_dev
);
788 if (--bond
->igmp_retrans
> 0)
789 queue_delayed_work(bond
->wq
, &bond
->mcast_work
, HZ
/5);
791 read_unlock(&bond
->lock
);
794 static void bond_resend_igmp_join_requests_delayed(struct work_struct
*work
)
796 struct bonding
*bond
= container_of(work
, struct bonding
,
798 bond_resend_igmp_join_requests(bond
);
802 * flush all members of flush->mc_list from device dev->mc_list
804 static void bond_mc_list_flush(struct net_device
*bond_dev
,
805 struct net_device
*slave_dev
)
807 struct bonding
*bond
= netdev_priv(bond_dev
);
808 struct netdev_hw_addr
*ha
;
810 netdev_for_each_mc_addr(ha
, bond_dev
)
811 dev_mc_del(slave_dev
, ha
->addr
);
813 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
814 /* del lacpdu mc addr from mc list */
815 u8 lacpdu_multicast
[ETH_ALEN
] = MULTICAST_LACPDU_ADDR
;
817 dev_mc_del(slave_dev
, lacpdu_multicast
);
821 /*--------------------------- Active slave change ---------------------------*/
824 * Update the mc list and multicast-related flags for the new and
825 * old active slaves (if any) according to the multicast mode, and
826 * promiscuous flags unconditionally.
828 static void bond_mc_swap(struct bonding
*bond
, struct slave
*new_active
,
829 struct slave
*old_active
)
831 struct netdev_hw_addr
*ha
;
833 if (!USES_PRIMARY(bond
->params
.mode
))
834 /* nothing to do - mc list is already up-to-date on
840 if (bond
->dev
->flags
& IFF_PROMISC
)
841 dev_set_promiscuity(old_active
->dev
, -1);
843 if (bond
->dev
->flags
& IFF_ALLMULTI
)
844 dev_set_allmulti(old_active
->dev
, -1);
846 netdev_for_each_mc_addr(ha
, bond
->dev
)
847 dev_mc_del(old_active
->dev
, ha
->addr
);
851 /* FIXME: Signal errors upstream. */
852 if (bond
->dev
->flags
& IFF_PROMISC
)
853 dev_set_promiscuity(new_active
->dev
, 1);
855 if (bond
->dev
->flags
& IFF_ALLMULTI
)
856 dev_set_allmulti(new_active
->dev
, 1);
858 netdev_for_each_mc_addr(ha
, bond
->dev
)
859 dev_mc_add(new_active
->dev
, ha
->addr
);
864 * bond_do_fail_over_mac
866 * Perform special MAC address swapping for fail_over_mac settings
868 * Called with RTNL, bond->lock for read, curr_slave_lock for write_bh.
870 static void bond_do_fail_over_mac(struct bonding
*bond
,
871 struct slave
*new_active
,
872 struct slave
*old_active
)
873 __releases(&bond
->curr_slave_lock
)
874 __releases(&bond
->lock
)
875 __acquires(&bond
->lock
)
876 __acquires(&bond
->curr_slave_lock
)
878 u8 tmp_mac
[ETH_ALEN
];
879 struct sockaddr saddr
;
882 switch (bond
->params
.fail_over_mac
) {
883 case BOND_FOM_ACTIVE
:
885 memcpy(bond
->dev
->dev_addr
, new_active
->dev
->dev_addr
,
886 new_active
->dev
->addr_len
);
888 case BOND_FOM_FOLLOW
:
890 * if new_active && old_active, swap them
891 * if just old_active, do nothing (going to no active slave)
892 * if just new_active, set new_active to bond's MAC
897 write_unlock_bh(&bond
->curr_slave_lock
);
898 read_unlock(&bond
->lock
);
901 memcpy(tmp_mac
, new_active
->dev
->dev_addr
, ETH_ALEN
);
902 memcpy(saddr
.sa_data
, old_active
->dev
->dev_addr
,
904 saddr
.sa_family
= new_active
->dev
->type
;
906 memcpy(saddr
.sa_data
, bond
->dev
->dev_addr
, ETH_ALEN
);
907 saddr
.sa_family
= bond
->dev
->type
;
910 rv
= dev_set_mac_address(new_active
->dev
, &saddr
);
912 pr_err("%s: Error %d setting MAC of slave %s\n",
913 bond
->dev
->name
, -rv
, new_active
->dev
->name
);
920 memcpy(saddr
.sa_data
, tmp_mac
, ETH_ALEN
);
921 saddr
.sa_family
= old_active
->dev
->type
;
923 rv
= dev_set_mac_address(old_active
->dev
, &saddr
);
925 pr_err("%s: Error %d setting MAC of slave %s\n",
926 bond
->dev
->name
, -rv
, new_active
->dev
->name
);
928 read_lock(&bond
->lock
);
929 write_lock_bh(&bond
->curr_slave_lock
);
932 pr_err("%s: bond_do_fail_over_mac impossible: bad policy %d\n",
933 bond
->dev
->name
, bond
->params
.fail_over_mac
);
939 static bool bond_should_change_active(struct bonding
*bond
)
941 struct slave
*prim
= bond
->primary_slave
;
942 struct slave
*curr
= bond
->curr_active_slave
;
944 if (!prim
|| !curr
|| curr
->link
!= BOND_LINK_UP
)
946 if (bond
->force_primary
) {
947 bond
->force_primary
= false;
950 if (bond
->params
.primary_reselect
== BOND_PRI_RESELECT_BETTER
&&
951 (prim
->speed
< curr
->speed
||
952 (prim
->speed
== curr
->speed
&& prim
->duplex
<= curr
->duplex
)))
954 if (bond
->params
.primary_reselect
== BOND_PRI_RESELECT_FAILURE
)
960 * find_best_interface - select the best available slave to be the active one
961 * @bond: our bonding struct
963 * Warning: Caller must hold curr_slave_lock for writing.
965 static struct slave
*bond_find_best_slave(struct bonding
*bond
)
967 struct slave
*new_active
, *old_active
;
968 struct slave
*bestslave
= NULL
;
969 int mintime
= bond
->params
.updelay
;
972 new_active
= bond
->curr_active_slave
;
974 if (!new_active
) { /* there were no active slaves left */
975 if (bond
->slave_cnt
> 0) /* found one slave */
976 new_active
= bond
->first_slave
;
978 return NULL
; /* still no slave, return NULL */
981 if ((bond
->primary_slave
) &&
982 bond
->primary_slave
->link
== BOND_LINK_UP
&&
983 bond_should_change_active(bond
)) {
984 new_active
= bond
->primary_slave
;
987 /* remember where to stop iterating over the slaves */
988 old_active
= new_active
;
990 bond_for_each_slave_from(bond
, new_active
, i
, old_active
) {
991 if (new_active
->link
== BOND_LINK_UP
) {
993 } else if (new_active
->link
== BOND_LINK_BACK
&&
994 IS_UP(new_active
->dev
)) {
995 /* link up, but waiting for stabilization */
996 if (new_active
->delay
< mintime
) {
997 mintime
= new_active
->delay
;
998 bestslave
= new_active
;
1006 static bool bond_should_notify_peers(struct bonding
*bond
)
1008 struct slave
*slave
= bond
->curr_active_slave
;
1010 pr_debug("bond_should_notify_peers: bond %s slave %s\n",
1011 bond
->dev
->name
, slave
? slave
->dev
->name
: "NULL");
1013 if (!slave
|| !bond
->send_peer_notif
||
1014 test_bit(__LINK_STATE_LINKWATCH_PENDING
, &slave
->dev
->state
))
1017 bond
->send_peer_notif
--;
1022 * change_active_interface - change the active slave into the specified one
1023 * @bond: our bonding struct
1024 * @new: the new slave to make the active one
1026 * Set the new slave to the bond's settings and unset them on the old
1027 * curr_active_slave.
1028 * Setting include flags, mc-list, promiscuity, allmulti, etc.
1030 * If @new's link state is %BOND_LINK_BACK we'll set it to %BOND_LINK_UP,
1031 * because it is apparently the best available slave we have, even though its
1032 * updelay hasn't timed out yet.
1034 * If new_active is not NULL, caller must hold bond->lock for read and
1035 * curr_slave_lock for write_bh.
1037 void bond_change_active_slave(struct bonding
*bond
, struct slave
*new_active
)
1039 struct slave
*old_active
= bond
->curr_active_slave
;
1041 if (old_active
== new_active
)
1045 new_active
->jiffies
= jiffies
;
1047 if (new_active
->link
== BOND_LINK_BACK
) {
1048 if (USES_PRIMARY(bond
->params
.mode
)) {
1049 pr_info("%s: making interface %s the new active one %d ms earlier.\n",
1050 bond
->dev
->name
, new_active
->dev
->name
,
1051 (bond
->params
.updelay
- new_active
->delay
) * bond
->params
.miimon
);
1054 new_active
->delay
= 0;
1055 new_active
->link
= BOND_LINK_UP
;
1057 if (bond
->params
.mode
== BOND_MODE_8023AD
)
1058 bond_3ad_handle_link_change(new_active
, BOND_LINK_UP
);
1060 if (bond_is_lb(bond
))
1061 bond_alb_handle_link_change(bond
, new_active
, BOND_LINK_UP
);
1063 if (USES_PRIMARY(bond
->params
.mode
)) {
1064 pr_info("%s: making interface %s the new active one.\n",
1065 bond
->dev
->name
, new_active
->dev
->name
);
1070 if (USES_PRIMARY(bond
->params
.mode
))
1071 bond_mc_swap(bond
, new_active
, old_active
);
1073 if (bond_is_lb(bond
)) {
1074 bond_alb_handle_active_change(bond
, new_active
);
1076 bond_set_slave_inactive_flags(old_active
);
1078 bond_set_slave_active_flags(new_active
);
1080 bond
->curr_active_slave
= new_active
;
1083 if (bond
->params
.mode
== BOND_MODE_ACTIVEBACKUP
) {
1085 bond_set_slave_inactive_flags(old_active
);
1088 bool should_notify_peers
= false;
1090 bond_set_slave_active_flags(new_active
);
1092 if (bond
->params
.fail_over_mac
)
1093 bond_do_fail_over_mac(bond
, new_active
,
1096 if (netif_running(bond
->dev
)) {
1097 bond
->send_peer_notif
=
1098 bond
->params
.num_peer_notif
;
1099 should_notify_peers
=
1100 bond_should_notify_peers(bond
);
1103 write_unlock_bh(&bond
->curr_slave_lock
);
1104 read_unlock(&bond
->lock
);
1106 netdev_bonding_change(bond
->dev
, NETDEV_BONDING_FAILOVER
);
1107 if (should_notify_peers
)
1108 netdev_bonding_change(bond
->dev
,
1109 NETDEV_NOTIFY_PEERS
);
1111 read_lock(&bond
->lock
);
1112 write_lock_bh(&bond
->curr_slave_lock
);
1116 /* resend IGMP joins since active slave has changed or
1117 * all were sent on curr_active_slave.
1118 * resend only if bond is brought up with the affected
1119 * bonding modes and the retransmission is enabled */
1120 if (netif_running(bond
->dev
) && (bond
->params
.resend_igmp
> 0) &&
1121 ((USES_PRIMARY(bond
->params
.mode
) && new_active
) ||
1122 bond
->params
.mode
== BOND_MODE_ROUNDROBIN
)) {
1123 bond
->igmp_retrans
= bond
->params
.resend_igmp
;
1124 queue_delayed_work(bond
->wq
, &bond
->mcast_work
, 0);
1129 * bond_select_active_slave - select a new active slave, if needed
1130 * @bond: our bonding struct
1132 * This functions should be called when one of the following occurs:
1133 * - The old curr_active_slave has been released or lost its link.
1134 * - The primary_slave has got its link back.
1135 * - A slave has got its link back and there's no old curr_active_slave.
1137 * Caller must hold bond->lock for read and curr_slave_lock for write_bh.
1139 void bond_select_active_slave(struct bonding
*bond
)
1141 struct slave
*best_slave
;
1144 best_slave
= bond_find_best_slave(bond
);
1145 if (best_slave
!= bond
->curr_active_slave
) {
1146 bond_change_active_slave(bond
, best_slave
);
1147 rv
= bond_set_carrier(bond
);
1151 if (netif_carrier_ok(bond
->dev
)) {
1152 pr_info("%s: first active interface up!\n",
1155 pr_info("%s: now running without any active interface !\n",
1161 /*--------------------------- slave list handling ---------------------------*/
1164 * This function attaches the slave to the end of list.
1166 * bond->lock held for writing by caller.
1168 static void bond_attach_slave(struct bonding
*bond
, struct slave
*new_slave
)
1170 if (bond
->first_slave
== NULL
) { /* attaching the first slave */
1171 new_slave
->next
= new_slave
;
1172 new_slave
->prev
= new_slave
;
1173 bond
->first_slave
= new_slave
;
1175 new_slave
->next
= bond
->first_slave
;
1176 new_slave
->prev
= bond
->first_slave
->prev
;
1177 new_slave
->next
->prev
= new_slave
;
1178 new_slave
->prev
->next
= new_slave
;
1185 * This function detaches the slave from the list.
1186 * WARNING: no check is made to verify if the slave effectively
1187 * belongs to <bond>.
1188 * Nothing is freed on return, structures are just unchained.
1189 * If any slave pointer in bond was pointing to <slave>,
1190 * it should be changed by the calling function.
1192 * bond->lock held for writing by caller.
1194 static void bond_detach_slave(struct bonding
*bond
, struct slave
*slave
)
1197 slave
->next
->prev
= slave
->prev
;
1200 slave
->prev
->next
= slave
->next
;
1202 if (bond
->first_slave
== slave
) { /* slave is the first slave */
1203 if (bond
->slave_cnt
> 1) { /* there are more slave */
1204 bond
->first_slave
= slave
->next
;
1206 bond
->first_slave
= NULL
; /* slave was the last one */
1215 #ifdef CONFIG_NET_POLL_CONTROLLER
1216 static inline int slave_enable_netpoll(struct slave
*slave
)
1221 np
= kzalloc(sizeof(*np
), GFP_KERNEL
);
1226 np
->dev
= slave
->dev
;
1227 strlcpy(np
->dev_name
, slave
->dev
->name
, IFNAMSIZ
);
1228 err
= __netpoll_setup(np
);
1237 static inline void slave_disable_netpoll(struct slave
*slave
)
1239 struct netpoll
*np
= slave
->np
;
1245 synchronize_rcu_bh();
1246 __netpoll_cleanup(np
);
1249 static inline bool slave_dev_support_netpoll(struct net_device
*slave_dev
)
1251 if (slave_dev
->priv_flags
& IFF_DISABLE_NETPOLL
)
1253 if (!slave_dev
->netdev_ops
->ndo_poll_controller
)
1258 static void bond_poll_controller(struct net_device
*bond_dev
)
1262 static void __bond_netpoll_cleanup(struct bonding
*bond
)
1264 struct slave
*slave
;
1267 bond_for_each_slave(bond
, slave
, i
)
1268 if (IS_UP(slave
->dev
))
1269 slave_disable_netpoll(slave
);
1271 static void bond_netpoll_cleanup(struct net_device
*bond_dev
)
1273 struct bonding
*bond
= netdev_priv(bond_dev
);
1275 read_lock(&bond
->lock
);
1276 __bond_netpoll_cleanup(bond
);
1277 read_unlock(&bond
->lock
);
1280 static int bond_netpoll_setup(struct net_device
*dev
, struct netpoll_info
*ni
)
1282 struct bonding
*bond
= netdev_priv(dev
);
1283 struct slave
*slave
;
1286 read_lock(&bond
->lock
);
1287 bond_for_each_slave(bond
, slave
, i
) {
1288 err
= slave_enable_netpoll(slave
);
1290 __bond_netpoll_cleanup(bond
);
1294 read_unlock(&bond
->lock
);
1298 static struct netpoll_info
*bond_netpoll_info(struct bonding
*bond
)
1300 return bond
->dev
->npinfo
;
1304 static inline int slave_enable_netpoll(struct slave
*slave
)
1308 static inline void slave_disable_netpoll(struct slave
*slave
)
1311 static void bond_netpoll_cleanup(struct net_device
*bond_dev
)
1316 /*---------------------------------- IOCTL ----------------------------------*/
1318 static int bond_sethwaddr(struct net_device
*bond_dev
,
1319 struct net_device
*slave_dev
)
1321 pr_debug("bond_dev=%p\n", bond_dev
);
1322 pr_debug("slave_dev=%p\n", slave_dev
);
1323 pr_debug("slave_dev->addr_len=%d\n", slave_dev
->addr_len
);
1324 memcpy(bond_dev
->dev_addr
, slave_dev
->dev_addr
, slave_dev
->addr_len
);
1328 static u32
bond_fix_features(struct net_device
*dev
, u32 features
)
1330 struct slave
*slave
;
1331 struct bonding
*bond
= netdev_priv(dev
);
1335 read_lock(&bond
->lock
);
1337 if (!bond
->first_slave
) {
1338 /* Disable adding VLANs to empty bond. But why? --mq */
1339 features
|= NETIF_F_VLAN_CHALLENGED
;
1344 features
&= ~NETIF_F_ONE_FOR_ALL
;
1345 features
|= NETIF_F_ALL_FOR_ALL
;
1347 bond_for_each_slave(bond
, slave
, i
) {
1348 features
= netdev_increment_features(features
,
1349 slave
->dev
->features
,
1354 read_unlock(&bond
->lock
);
1358 #define BOND_VLAN_FEATURES (NETIF_F_ALL_CSUM | NETIF_F_SG | \
1359 NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
1360 NETIF_F_HIGHDMA | NETIF_F_LRO)
1362 static void bond_compute_features(struct bonding
*bond
)
1364 struct slave
*slave
;
1365 struct net_device
*bond_dev
= bond
->dev
;
1366 u32 vlan_features
= BOND_VLAN_FEATURES
;
1367 unsigned short max_hard_header_len
= ETH_HLEN
;
1370 read_lock(&bond
->lock
);
1372 if (!bond
->first_slave
)
1375 bond_for_each_slave(bond
, slave
, i
) {
1376 vlan_features
= netdev_increment_features(vlan_features
,
1377 slave
->dev
->vlan_features
, BOND_VLAN_FEATURES
);
1379 if (slave
->dev
->hard_header_len
> max_hard_header_len
)
1380 max_hard_header_len
= slave
->dev
->hard_header_len
;
1384 bond_dev
->vlan_features
= vlan_features
;
1385 bond_dev
->hard_header_len
= max_hard_header_len
;
1387 read_unlock(&bond
->lock
);
1389 netdev_change_features(bond_dev
);
1392 static void bond_setup_by_slave(struct net_device
*bond_dev
,
1393 struct net_device
*slave_dev
)
1395 struct bonding
*bond
= netdev_priv(bond_dev
);
1397 bond_dev
->header_ops
= slave_dev
->header_ops
;
1399 bond_dev
->type
= slave_dev
->type
;
1400 bond_dev
->hard_header_len
= slave_dev
->hard_header_len
;
1401 bond_dev
->addr_len
= slave_dev
->addr_len
;
1403 memcpy(bond_dev
->broadcast
, slave_dev
->broadcast
,
1404 slave_dev
->addr_len
);
1405 bond
->setup_by_slave
= 1;
1408 /* On bonding slaves other than the currently active slave, suppress
1409 * duplicates except for alb non-mcast/bcast.
1411 static bool bond_should_deliver_exact_match(struct sk_buff
*skb
,
1412 struct slave
*slave
,
1413 struct bonding
*bond
)
1415 if (bond_is_slave_inactive(slave
)) {
1416 if (bond
->params
.mode
== BOND_MODE_ALB
&&
1417 skb
->pkt_type
!= PACKET_BROADCAST
&&
1418 skb
->pkt_type
!= PACKET_MULTICAST
)
1425 static rx_handler_result_t
bond_handle_frame(struct sk_buff
**pskb
)
1427 struct sk_buff
*skb
= *pskb
;
1428 struct slave
*slave
;
1429 struct bonding
*bond
;
1430 void (*recv_probe
)(struct sk_buff
*, struct bonding
*,
1433 skb
= skb_share_check(skb
, GFP_ATOMIC
);
1435 return RX_HANDLER_CONSUMED
;
1439 slave
= bond_slave_get_rcu(skb
->dev
);
1442 if (bond
->params
.arp_interval
)
1443 slave
->dev
->last_rx
= jiffies
;
1445 recv_probe
= ACCESS_ONCE(bond
->recv_probe
);
1447 struct sk_buff
*nskb
= skb_clone(skb
, GFP_ATOMIC
);
1450 recv_probe(nskb
, bond
, slave
);
1451 dev_kfree_skb(nskb
);
1455 if (bond_should_deliver_exact_match(skb
, slave
, bond
)) {
1456 return RX_HANDLER_EXACT
;
1459 skb
->dev
= bond
->dev
;
1461 if (bond
->params
.mode
== BOND_MODE_ALB
&&
1462 bond
->dev
->priv_flags
& IFF_BRIDGE_PORT
&&
1463 skb
->pkt_type
== PACKET_HOST
) {
1465 if (unlikely(skb_cow_head(skb
,
1466 skb
->data
- skb_mac_header(skb
)))) {
1468 return RX_HANDLER_CONSUMED
;
1470 memcpy(eth_hdr(skb
)->h_dest
, bond
->dev
->dev_addr
, ETH_ALEN
);
1473 return RX_HANDLER_ANOTHER
;
1476 /* enslave device <slave> to bond device <master> */
1477 int bond_enslave(struct net_device
*bond_dev
, struct net_device
*slave_dev
)
1479 struct bonding
*bond
= netdev_priv(bond_dev
);
1480 const struct net_device_ops
*slave_ops
= slave_dev
->netdev_ops
;
1481 struct slave
*new_slave
= NULL
;
1482 struct netdev_hw_addr
*ha
;
1483 struct sockaddr addr
;
1487 if (!bond
->params
.use_carrier
&& slave_dev
->ethtool_ops
== NULL
&&
1488 slave_ops
->ndo_do_ioctl
== NULL
) {
1489 pr_warning("%s: Warning: no link monitoring support for %s\n",
1490 bond_dev
->name
, slave_dev
->name
);
1493 /* already enslaved */
1494 if (slave_dev
->flags
& IFF_SLAVE
) {
1495 pr_debug("Error, Device was already enslaved\n");
1499 /* vlan challenged mutual exclusion */
1500 /* no need to lock since we're protected by rtnl_lock */
1501 if (slave_dev
->features
& NETIF_F_VLAN_CHALLENGED
) {
1502 pr_debug("%s: NETIF_F_VLAN_CHALLENGED\n", slave_dev
->name
);
1503 if (bond_vlan_used(bond
)) {
1504 pr_err("%s: Error: cannot enslave VLAN challenged slave %s on VLAN enabled bond %s\n",
1505 bond_dev
->name
, slave_dev
->name
, bond_dev
->name
);
1508 pr_warning("%s: Warning: enslaved VLAN challenged slave %s. Adding VLANs will be blocked as long as %s is part of bond %s\n",
1509 bond_dev
->name
, slave_dev
->name
,
1510 slave_dev
->name
, bond_dev
->name
);
1513 pr_debug("%s: ! NETIF_F_VLAN_CHALLENGED\n", slave_dev
->name
);
1517 * Old ifenslave binaries are no longer supported. These can
1518 * be identified with moderate accuracy by the state of the slave:
1519 * the current ifenslave will set the interface down prior to
1520 * enslaving it; the old ifenslave will not.
1522 if ((slave_dev
->flags
& IFF_UP
)) {
1523 pr_err("%s is up. This may be due to an out of date ifenslave.\n",
1526 goto err_undo_flags
;
1529 /* set bonding device ether type by slave - bonding netdevices are
1530 * created with ether_setup, so when the slave type is not ARPHRD_ETHER
1531 * there is a need to override some of the type dependent attribs/funcs.
1533 * bond ether type mutual exclusion - don't allow slaves of dissimilar
1534 * ether type (eg ARPHRD_ETHER and ARPHRD_INFINIBAND) share the same bond
1536 if (bond
->slave_cnt
== 0) {
1537 if (bond_dev
->type
!= slave_dev
->type
) {
1538 pr_debug("%s: change device type from %d to %d\n",
1540 bond_dev
->type
, slave_dev
->type
);
1542 res
= netdev_bonding_change(bond_dev
,
1543 NETDEV_PRE_TYPE_CHANGE
);
1544 res
= notifier_to_errno(res
);
1546 pr_err("%s: refused to change device type\n",
1549 goto err_undo_flags
;
1552 /* Flush unicast and multicast addresses */
1553 dev_uc_flush(bond_dev
);
1554 dev_mc_flush(bond_dev
);
1556 if (slave_dev
->type
!= ARPHRD_ETHER
)
1557 bond_setup_by_slave(bond_dev
, slave_dev
);
1559 ether_setup(bond_dev
);
1560 bond_dev
->priv_flags
&= ~IFF_TX_SKB_SHARING
;
1563 netdev_bonding_change(bond_dev
,
1564 NETDEV_POST_TYPE_CHANGE
);
1566 } else if (bond_dev
->type
!= slave_dev
->type
) {
1567 pr_err("%s ether type (%d) is different from other slaves (%d), can not enslave it.\n",
1569 slave_dev
->type
, bond_dev
->type
);
1571 goto err_undo_flags
;
1574 if (slave_ops
->ndo_set_mac_address
== NULL
) {
1575 if (bond
->slave_cnt
== 0) {
1576 pr_warning("%s: Warning: The first slave device specified does not support setting the MAC address. Setting fail_over_mac to active.",
1578 bond
->params
.fail_over_mac
= BOND_FOM_ACTIVE
;
1579 } else if (bond
->params
.fail_over_mac
!= BOND_FOM_ACTIVE
) {
1580 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",
1583 goto err_undo_flags
;
1587 call_netdevice_notifiers(NETDEV_JOIN
, slave_dev
);
1589 /* If this is the first slave, then we need to set the master's hardware
1590 * address to be the same as the slave's. */
1591 if (is_zero_ether_addr(bond
->dev
->dev_addr
))
1592 memcpy(bond
->dev
->dev_addr
, slave_dev
->dev_addr
,
1593 slave_dev
->addr_len
);
1596 new_slave
= kzalloc(sizeof(struct slave
), GFP_KERNEL
);
1599 goto err_undo_flags
;
1603 * Set the new_slave's queue_id to be zero. Queue ID mapping
1604 * is set via sysfs or module option if desired.
1606 new_slave
->queue_id
= 0;
1608 /* Save slave's original mtu and then set it to match the bond */
1609 new_slave
->original_mtu
= slave_dev
->mtu
;
1610 res
= dev_set_mtu(slave_dev
, bond
->dev
->mtu
);
1612 pr_debug("Error %d calling dev_set_mtu\n", res
);
1617 * Save slave's original ("permanent") mac address for modes
1618 * that need it, and for restoring it upon release, and then
1619 * set it to the master's address
1621 memcpy(new_slave
->perm_hwaddr
, slave_dev
->dev_addr
, ETH_ALEN
);
1623 if (!bond
->params
.fail_over_mac
) {
1625 * Set slave to master's mac address. The application already
1626 * set the master's mac address to that of the first slave
1628 memcpy(addr
.sa_data
, bond_dev
->dev_addr
, bond_dev
->addr_len
);
1629 addr
.sa_family
= slave_dev
->type
;
1630 res
= dev_set_mac_address(slave_dev
, &addr
);
1632 pr_debug("Error %d calling set_mac_address\n", res
);
1633 goto err_restore_mtu
;
1637 res
= netdev_set_bond_master(slave_dev
, bond_dev
);
1639 pr_debug("Error %d calling netdev_set_bond_master\n", res
);
1640 goto err_restore_mac
;
1643 /* open the slave since the application closed it */
1644 res
= dev_open(slave_dev
);
1646 pr_debug("Opening slave %s failed\n", slave_dev
->name
);
1647 goto err_unset_master
;
1650 new_slave
->bond
= bond
;
1651 new_slave
->dev
= slave_dev
;
1652 slave_dev
->priv_flags
|= IFF_BONDING
;
1654 if (bond_is_lb(bond
)) {
1655 /* bond_alb_init_slave() must be called before all other stages since
1656 * it might fail and we do not want to have to undo everything
1658 res
= bond_alb_init_slave(bond
, new_slave
);
1663 /* If the mode USES_PRIMARY, then the new slave gets the
1664 * master's promisc (and mc) settings only if it becomes the
1665 * curr_active_slave, and that is taken care of later when calling
1666 * bond_change_active()
1668 if (!USES_PRIMARY(bond
->params
.mode
)) {
1669 /* set promiscuity level to new slave */
1670 if (bond_dev
->flags
& IFF_PROMISC
) {
1671 res
= dev_set_promiscuity(slave_dev
, 1);
1676 /* set allmulti level to new slave */
1677 if (bond_dev
->flags
& IFF_ALLMULTI
) {
1678 res
= dev_set_allmulti(slave_dev
, 1);
1683 netif_addr_lock_bh(bond_dev
);
1684 /* upload master's mc_list to new slave */
1685 netdev_for_each_mc_addr(ha
, bond_dev
)
1686 dev_mc_add(slave_dev
, ha
->addr
);
1687 netif_addr_unlock_bh(bond_dev
);
1690 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
1691 /* add lacpdu mc addr to mc list */
1692 u8 lacpdu_multicast
[ETH_ALEN
] = MULTICAST_LACPDU_ADDR
;
1694 dev_mc_add(slave_dev
, lacpdu_multicast
);
1697 bond_add_vlans_on_slave(bond
, slave_dev
);
1699 write_lock_bh(&bond
->lock
);
1701 bond_attach_slave(bond
, new_slave
);
1703 new_slave
->delay
= 0;
1704 new_slave
->link_failure_count
= 0;
1706 write_unlock_bh(&bond
->lock
);
1708 bond_compute_features(bond
);
1710 read_lock(&bond
->lock
);
1712 new_slave
->last_arp_rx
= jiffies
;
1714 if (bond
->params
.miimon
&& !bond
->params
.use_carrier
) {
1715 link_reporting
= bond_check_dev_link(bond
, slave_dev
, 1);
1717 if ((link_reporting
== -1) && !bond
->params
.arp_interval
) {
1719 * miimon is set but a bonded network driver
1720 * does not support ETHTOOL/MII and
1721 * arp_interval is not set. Note: if
1722 * use_carrier is enabled, we will never go
1723 * here (because netif_carrier is always
1724 * supported); thus, we don't need to change
1725 * the messages for netif_carrier.
1727 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",
1728 bond_dev
->name
, slave_dev
->name
);
1729 } else if (link_reporting
== -1) {
1730 /* unable get link status using mii/ethtool */
1731 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",
1732 bond_dev
->name
, slave_dev
->name
);
1736 /* check for initial state */
1737 if (!bond
->params
.miimon
||
1738 (bond_check_dev_link(bond
, slave_dev
, 0) == BMSR_LSTATUS
)) {
1739 if (bond
->params
.updelay
) {
1740 pr_debug("Initial state of slave_dev is BOND_LINK_BACK\n");
1741 new_slave
->link
= BOND_LINK_BACK
;
1742 new_slave
->delay
= bond
->params
.updelay
;
1744 pr_debug("Initial state of slave_dev is BOND_LINK_UP\n");
1745 new_slave
->link
= BOND_LINK_UP
;
1747 new_slave
->jiffies
= jiffies
;
1749 pr_debug("Initial state of slave_dev is BOND_LINK_DOWN\n");
1750 new_slave
->link
= BOND_LINK_DOWN
;
1753 bond_update_speed_duplex(new_slave
);
1755 if (USES_PRIMARY(bond
->params
.mode
) && bond
->params
.primary
[0]) {
1756 /* if there is a primary slave, remember it */
1757 if (strcmp(bond
->params
.primary
, new_slave
->dev
->name
) == 0) {
1758 bond
->primary_slave
= new_slave
;
1759 bond
->force_primary
= true;
1763 write_lock_bh(&bond
->curr_slave_lock
);
1765 switch (bond
->params
.mode
) {
1766 case BOND_MODE_ACTIVEBACKUP
:
1767 bond_set_slave_inactive_flags(new_slave
);
1768 bond_select_active_slave(bond
);
1770 case BOND_MODE_8023AD
:
1771 /* in 802.3ad mode, the internal mechanism
1772 * will activate the slaves in the selected
1775 bond_set_slave_inactive_flags(new_slave
);
1776 /* if this is the first slave */
1777 if (bond
->slave_cnt
== 1) {
1778 SLAVE_AD_INFO(new_slave
).id
= 1;
1779 /* Initialize AD with the number of times that the AD timer is called in 1 second
1780 * can be called only after the mac address of the bond is set
1782 bond_3ad_initialize(bond
, 1000/AD_TIMER_INTERVAL
);
1784 SLAVE_AD_INFO(new_slave
).id
=
1785 SLAVE_AD_INFO(new_slave
->prev
).id
+ 1;
1788 bond_3ad_bind_slave(new_slave
);
1792 bond_set_active_slave(new_slave
);
1793 bond_set_slave_inactive_flags(new_slave
);
1794 bond_select_active_slave(bond
);
1797 pr_debug("This slave is always active in trunk mode\n");
1799 /* always active in trunk mode */
1800 bond_set_active_slave(new_slave
);
1802 /* In trunking mode there is little meaning to curr_active_slave
1803 * anyway (it holds no special properties of the bond device),
1804 * so we can change it without calling change_active_interface()
1806 if (!bond
->curr_active_slave
)
1807 bond
->curr_active_slave
= new_slave
;
1810 } /* switch(bond_mode) */
1812 write_unlock_bh(&bond
->curr_slave_lock
);
1814 bond_set_carrier(bond
);
1816 #ifdef CONFIG_NET_POLL_CONTROLLER
1817 slave_dev
->npinfo
= bond_netpoll_info(bond
);
1818 if (slave_dev
->npinfo
) {
1819 if (slave_enable_netpoll(new_slave
)) {
1820 read_unlock(&bond
->lock
);
1821 pr_info("Error, %s: master_dev is using netpoll, "
1822 "but new slave device does not support netpoll.\n",
1830 read_unlock(&bond
->lock
);
1832 res
= bond_create_slave_symlinks(bond_dev
, slave_dev
);
1836 res
= netdev_rx_handler_register(slave_dev
, bond_handle_frame
,
1839 pr_debug("Error %d calling netdev_rx_handler_register\n", res
);
1840 goto err_dest_symlinks
;
1843 pr_info("%s: enslaving %s as a%s interface with a%s link.\n",
1844 bond_dev
->name
, slave_dev
->name
,
1845 bond_is_active_slave(new_slave
) ? "n active" : " backup",
1846 new_slave
->link
!= BOND_LINK_DOWN
? "n up" : " down");
1848 /* enslave is successful */
1851 /* Undo stages on error */
1853 bond_destroy_slave_symlinks(bond_dev
, slave_dev
);
1856 dev_close(slave_dev
);
1859 netdev_set_bond_master(slave_dev
, NULL
);
1862 if (!bond
->params
.fail_over_mac
) {
1863 /* XXX TODO - fom follow mode needs to change master's
1864 * MAC if this slave's MAC is in use by the bond, or at
1865 * least print a warning.
1867 memcpy(addr
.sa_data
, new_slave
->perm_hwaddr
, ETH_ALEN
);
1868 addr
.sa_family
= slave_dev
->type
;
1869 dev_set_mac_address(slave_dev
, &addr
);
1873 dev_set_mtu(slave_dev
, new_slave
->original_mtu
);
1879 bond_compute_features(bond
);
1885 * Try to release the slave device <slave> from the bond device <master>
1886 * It is legal to access curr_active_slave without a lock because all the function
1889 * The rules for slave state should be:
1890 * for Active/Backup:
1891 * Active stays on all backups go down
1892 * for Bonded connections:
1893 * The first up interface should be left on and all others downed.
1895 int bond_release(struct net_device
*bond_dev
, struct net_device
*slave_dev
)
1897 struct bonding
*bond
= netdev_priv(bond_dev
);
1898 struct slave
*slave
, *oldcurrent
;
1899 struct sockaddr addr
;
1900 u32 old_features
= bond_dev
->features
;
1902 /* slave is not a slave or master is not master of this slave */
1903 if (!(slave_dev
->flags
& IFF_SLAVE
) ||
1904 (slave_dev
->master
!= bond_dev
)) {
1905 pr_err("%s: Error: cannot release %s.\n",
1906 bond_dev
->name
, slave_dev
->name
);
1911 netdev_bonding_change(bond_dev
, NETDEV_RELEASE
);
1912 write_lock_bh(&bond
->lock
);
1914 slave
= bond_get_slave_by_dev(bond
, slave_dev
);
1916 /* not a slave of this bond */
1917 pr_info("%s: %s not enslaved\n",
1918 bond_dev
->name
, slave_dev
->name
);
1919 write_unlock_bh(&bond
->lock
);
1920 unblock_netpoll_tx();
1924 /* unregister rx_handler early so bond_handle_frame wouldn't be called
1925 * for this slave anymore.
1927 netdev_rx_handler_unregister(slave_dev
);
1928 write_unlock_bh(&bond
->lock
);
1930 write_lock_bh(&bond
->lock
);
1932 if (!bond
->params
.fail_over_mac
) {
1933 if (!compare_ether_addr(bond_dev
->dev_addr
, slave
->perm_hwaddr
) &&
1934 bond
->slave_cnt
> 1)
1935 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",
1936 bond_dev
->name
, slave_dev
->name
,
1938 bond_dev
->name
, slave_dev
->name
);
1941 /* Inform AD package of unbinding of slave. */
1942 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
1943 /* must be called before the slave is
1944 * detached from the list
1946 bond_3ad_unbind_slave(slave
);
1949 pr_info("%s: releasing %s interface %s\n",
1951 bond_is_active_slave(slave
) ? "active" : "backup",
1954 oldcurrent
= bond
->curr_active_slave
;
1956 bond
->current_arp_slave
= NULL
;
1958 /* release the slave from its bond */
1959 bond_detach_slave(bond
, slave
);
1961 if (bond
->primary_slave
== slave
)
1962 bond
->primary_slave
= NULL
;
1964 if (oldcurrent
== slave
)
1965 bond_change_active_slave(bond
, NULL
);
1967 if (bond_is_lb(bond
)) {
1968 /* Must be called only after the slave has been
1969 * detached from the list and the curr_active_slave
1970 * has been cleared (if our_slave == old_current),
1971 * but before a new active slave is selected.
1973 write_unlock_bh(&bond
->lock
);
1974 bond_alb_deinit_slave(bond
, slave
);
1975 write_lock_bh(&bond
->lock
);
1978 if (oldcurrent
== slave
) {
1980 * Note that we hold RTNL over this sequence, so there
1981 * is no concern that another slave add/remove event
1984 write_unlock_bh(&bond
->lock
);
1985 read_lock(&bond
->lock
);
1986 write_lock_bh(&bond
->curr_slave_lock
);
1988 bond_select_active_slave(bond
);
1990 write_unlock_bh(&bond
->curr_slave_lock
);
1991 read_unlock(&bond
->lock
);
1992 write_lock_bh(&bond
->lock
);
1995 if (bond
->slave_cnt
== 0) {
1996 bond_set_carrier(bond
);
1998 /* if the last slave was removed, zero the mac address
1999 * of the master so it will be set by the application
2000 * to the mac address of the first slave
2002 memset(bond_dev
->dev_addr
, 0, bond_dev
->addr_len
);
2004 if (bond_vlan_used(bond
)) {
2005 pr_warning("%s: Warning: clearing HW address of %s while it still has VLANs.\n",
2006 bond_dev
->name
, bond_dev
->name
);
2007 pr_warning("%s: When re-adding slaves, make sure the bond's HW address matches its VLANs'.\n",
2012 write_unlock_bh(&bond
->lock
);
2013 unblock_netpoll_tx();
2015 bond_compute_features(bond
);
2016 if (!(bond_dev
->features
& NETIF_F_VLAN_CHALLENGED
) &&
2017 (old_features
& NETIF_F_VLAN_CHALLENGED
))
2018 pr_info("%s: last VLAN challenged slave %s left bond %s. VLAN blocking is removed\n",
2019 bond_dev
->name
, slave_dev
->name
, bond_dev
->name
);
2021 /* must do this from outside any spinlocks */
2022 bond_destroy_slave_symlinks(bond_dev
, slave_dev
);
2024 bond_del_vlans_from_slave(bond
, slave_dev
);
2026 /* If the mode USES_PRIMARY, then we should only remove its
2027 * promisc and mc settings if it was the curr_active_slave, but that was
2028 * already taken care of above when we detached the slave
2030 if (!USES_PRIMARY(bond
->params
.mode
)) {
2031 /* unset promiscuity level from slave */
2032 if (bond_dev
->flags
& IFF_PROMISC
)
2033 dev_set_promiscuity(slave_dev
, -1);
2035 /* unset allmulti level from slave */
2036 if (bond_dev
->flags
& IFF_ALLMULTI
)
2037 dev_set_allmulti(slave_dev
, -1);
2039 /* flush master's mc_list from slave */
2040 netif_addr_lock_bh(bond_dev
);
2041 bond_mc_list_flush(bond_dev
, slave_dev
);
2042 netif_addr_unlock_bh(bond_dev
);
2045 netdev_set_bond_master(slave_dev
, NULL
);
2047 slave_disable_netpoll(slave
);
2049 /* close slave before restoring its mac address */
2050 dev_close(slave_dev
);
2052 if (bond
->params
.fail_over_mac
!= BOND_FOM_ACTIVE
) {
2053 /* restore original ("permanent") mac address */
2054 memcpy(addr
.sa_data
, slave
->perm_hwaddr
, ETH_ALEN
);
2055 addr
.sa_family
= slave_dev
->type
;
2056 dev_set_mac_address(slave_dev
, &addr
);
2059 dev_set_mtu(slave_dev
, slave
->original_mtu
);
2061 slave_dev
->priv_flags
&= ~IFF_BONDING
;
2065 return 0; /* deletion OK */
2069 * First release a slave and then destroy the bond if no more slaves are left.
2070 * Must be under rtnl_lock when this function is called.
2072 static int bond_release_and_destroy(struct net_device
*bond_dev
,
2073 struct net_device
*slave_dev
)
2075 struct bonding
*bond
= netdev_priv(bond_dev
);
2078 ret
= bond_release(bond_dev
, slave_dev
);
2079 if ((ret
== 0) && (bond
->slave_cnt
== 0)) {
2080 bond_dev
->priv_flags
|= IFF_DISABLE_NETPOLL
;
2081 pr_info("%s: destroying bond %s.\n",
2082 bond_dev
->name
, bond_dev
->name
);
2083 unregister_netdevice(bond_dev
);
2089 * This function releases all slaves.
2091 static int bond_release_all(struct net_device
*bond_dev
)
2093 struct bonding
*bond
= netdev_priv(bond_dev
);
2094 struct slave
*slave
;
2095 struct net_device
*slave_dev
;
2096 struct sockaddr addr
;
2098 write_lock_bh(&bond
->lock
);
2100 netif_carrier_off(bond_dev
);
2102 if (bond
->slave_cnt
== 0)
2105 bond
->current_arp_slave
= NULL
;
2106 bond
->primary_slave
= NULL
;
2107 bond_change_active_slave(bond
, NULL
);
2109 while ((slave
= bond
->first_slave
) != NULL
) {
2110 /* Inform AD package of unbinding of slave
2111 * before slave is detached from the list.
2113 if (bond
->params
.mode
== BOND_MODE_8023AD
)
2114 bond_3ad_unbind_slave(slave
);
2116 slave_dev
= slave
->dev
;
2117 bond_detach_slave(bond
, slave
);
2119 /* now that the slave is detached, unlock and perform
2120 * all the undo steps that should not be called from
2123 write_unlock_bh(&bond
->lock
);
2125 /* unregister rx_handler early so bond_handle_frame wouldn't
2126 * be called for this slave anymore.
2128 netdev_rx_handler_unregister(slave_dev
);
2131 if (bond_is_lb(bond
)) {
2132 /* must be called only after the slave
2133 * has been detached from the list
2135 bond_alb_deinit_slave(bond
, slave
);
2138 bond_destroy_slave_symlinks(bond_dev
, slave_dev
);
2139 bond_del_vlans_from_slave(bond
, slave_dev
);
2141 /* If the mode USES_PRIMARY, then we should only remove its
2142 * promisc and mc settings if it was the curr_active_slave, but that was
2143 * already taken care of above when we detached the slave
2145 if (!USES_PRIMARY(bond
->params
.mode
)) {
2146 /* unset promiscuity level from slave */
2147 if (bond_dev
->flags
& IFF_PROMISC
)
2148 dev_set_promiscuity(slave_dev
, -1);
2150 /* unset allmulti level from slave */
2151 if (bond_dev
->flags
& IFF_ALLMULTI
)
2152 dev_set_allmulti(slave_dev
, -1);
2154 /* flush master's mc_list from slave */
2155 netif_addr_lock_bh(bond_dev
);
2156 bond_mc_list_flush(bond_dev
, slave_dev
);
2157 netif_addr_unlock_bh(bond_dev
);
2160 netdev_set_bond_master(slave_dev
, NULL
);
2162 slave_disable_netpoll(slave
);
2164 /* close slave before restoring its mac address */
2165 dev_close(slave_dev
);
2167 if (!bond
->params
.fail_over_mac
) {
2168 /* restore original ("permanent") mac address*/
2169 memcpy(addr
.sa_data
, slave
->perm_hwaddr
, ETH_ALEN
);
2170 addr
.sa_family
= slave_dev
->type
;
2171 dev_set_mac_address(slave_dev
, &addr
);
2176 /* re-acquire the lock before getting the next slave */
2177 write_lock_bh(&bond
->lock
);
2180 /* zero the mac address of the master so it will be
2181 * set by the application to the mac address of the
2184 memset(bond_dev
->dev_addr
, 0, bond_dev
->addr_len
);
2186 if (bond_vlan_used(bond
)) {
2187 pr_warning("%s: Warning: clearing HW address of %s while it still has VLANs.\n",
2188 bond_dev
->name
, bond_dev
->name
);
2189 pr_warning("%s: When re-adding slaves, make sure the bond's HW address matches its VLANs'.\n",
2193 pr_info("%s: released all slaves\n", bond_dev
->name
);
2196 write_unlock_bh(&bond
->lock
);
2198 bond_compute_features(bond
);
2204 * This function changes the active slave to slave <slave_dev>.
2205 * It returns -EINVAL in the following cases.
2206 * - <slave_dev> is not found in the list.
2207 * - There is not active slave now.
2208 * - <slave_dev> is already active.
2209 * - The link state of <slave_dev> is not BOND_LINK_UP.
2210 * - <slave_dev> is not running.
2211 * In these cases, this function does nothing.
2212 * In the other cases, current_slave pointer is changed and 0 is returned.
2214 static int bond_ioctl_change_active(struct net_device
*bond_dev
, struct net_device
*slave_dev
)
2216 struct bonding
*bond
= netdev_priv(bond_dev
);
2217 struct slave
*old_active
= NULL
;
2218 struct slave
*new_active
= NULL
;
2221 if (!USES_PRIMARY(bond
->params
.mode
))
2224 /* Verify that master_dev is indeed the master of slave_dev */
2225 if (!(slave_dev
->flags
& IFF_SLAVE
) || (slave_dev
->master
!= bond_dev
))
2228 read_lock(&bond
->lock
);
2230 read_lock(&bond
->curr_slave_lock
);
2231 old_active
= bond
->curr_active_slave
;
2232 read_unlock(&bond
->curr_slave_lock
);
2234 new_active
= bond_get_slave_by_dev(bond
, slave_dev
);
2237 * Changing to the current active: do nothing; return success.
2239 if (new_active
&& (new_active
== old_active
)) {
2240 read_unlock(&bond
->lock
);
2246 (new_active
->link
== BOND_LINK_UP
) &&
2247 IS_UP(new_active
->dev
)) {
2249 write_lock_bh(&bond
->curr_slave_lock
);
2250 bond_change_active_slave(bond
, new_active
);
2251 write_unlock_bh(&bond
->curr_slave_lock
);
2252 unblock_netpoll_tx();
2256 read_unlock(&bond
->lock
);
2261 static int bond_info_query(struct net_device
*bond_dev
, struct ifbond
*info
)
2263 struct bonding
*bond
= netdev_priv(bond_dev
);
2265 info
->bond_mode
= bond
->params
.mode
;
2266 info
->miimon
= bond
->params
.miimon
;
2268 read_lock(&bond
->lock
);
2269 info
->num_slaves
= bond
->slave_cnt
;
2270 read_unlock(&bond
->lock
);
2275 static int bond_slave_info_query(struct net_device
*bond_dev
, struct ifslave
*info
)
2277 struct bonding
*bond
= netdev_priv(bond_dev
);
2278 struct slave
*slave
;
2279 int i
, res
= -ENODEV
;
2281 read_lock(&bond
->lock
);
2283 bond_for_each_slave(bond
, slave
, i
) {
2284 if (i
== (int)info
->slave_id
) {
2286 strcpy(info
->slave_name
, slave
->dev
->name
);
2287 info
->link
= slave
->link
;
2288 info
->state
= bond_slave_state(slave
);
2289 info
->link_failure_count
= slave
->link_failure_count
;
2294 read_unlock(&bond
->lock
);
2299 /*-------------------------------- Monitoring -------------------------------*/
2302 static int bond_miimon_inspect(struct bonding
*bond
)
2304 struct slave
*slave
;
2305 int i
, link_state
, commit
= 0;
2306 bool ignore_updelay
;
2308 ignore_updelay
= !bond
->curr_active_slave
? true : false;
2310 bond_for_each_slave(bond
, slave
, i
) {
2311 slave
->new_link
= BOND_LINK_NOCHANGE
;
2313 link_state
= bond_check_dev_link(bond
, slave
->dev
, 0);
2315 switch (slave
->link
) {
2320 slave
->link
= BOND_LINK_FAIL
;
2321 slave
->delay
= bond
->params
.downdelay
;
2323 pr_info("%s: link status down for %sinterface %s, disabling it in %d ms.\n",
2325 (bond
->params
.mode
==
2326 BOND_MODE_ACTIVEBACKUP
) ?
2327 (bond_is_active_slave(slave
) ?
2328 "active " : "backup ") : "",
2330 bond
->params
.downdelay
* bond
->params
.miimon
);
2333 case BOND_LINK_FAIL
:
2336 * recovered before downdelay expired
2338 slave
->link
= BOND_LINK_UP
;
2339 slave
->jiffies
= jiffies
;
2340 pr_info("%s: link status up again after %d ms for interface %s.\n",
2342 (bond
->params
.downdelay
- slave
->delay
) *
2343 bond
->params
.miimon
,
2348 if (slave
->delay
<= 0) {
2349 slave
->new_link
= BOND_LINK_DOWN
;
2357 case BOND_LINK_DOWN
:
2361 slave
->link
= BOND_LINK_BACK
;
2362 slave
->delay
= bond
->params
.updelay
;
2365 pr_info("%s: link status up for interface %s, enabling it in %d ms.\n",
2366 bond
->dev
->name
, slave
->dev
->name
,
2367 ignore_updelay
? 0 :
2368 bond
->params
.updelay
*
2369 bond
->params
.miimon
);
2372 case BOND_LINK_BACK
:
2374 slave
->link
= BOND_LINK_DOWN
;
2375 pr_info("%s: link status down again after %d ms for interface %s.\n",
2377 (bond
->params
.updelay
- slave
->delay
) *
2378 bond
->params
.miimon
,
2387 if (slave
->delay
<= 0) {
2388 slave
->new_link
= BOND_LINK_UP
;
2390 ignore_updelay
= false;
2402 static void bond_miimon_commit(struct bonding
*bond
)
2404 struct slave
*slave
;
2407 bond_for_each_slave(bond
, slave
, i
) {
2408 switch (slave
->new_link
) {
2409 case BOND_LINK_NOCHANGE
:
2413 slave
->link
= BOND_LINK_UP
;
2414 slave
->jiffies
= jiffies
;
2416 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
2417 /* prevent it from being the active one */
2418 bond_set_backup_slave(slave
);
2419 } else if (bond
->params
.mode
!= BOND_MODE_ACTIVEBACKUP
) {
2420 /* make it immediately active */
2421 bond_set_active_slave(slave
);
2422 } else if (slave
!= bond
->primary_slave
) {
2423 /* prevent it from being the active one */
2424 bond_set_backup_slave(slave
);
2427 bond_update_speed_duplex(slave
);
2429 pr_info("%s: link status definitely up for interface %s, %u Mbps %s duplex.\n",
2430 bond
->dev
->name
, slave
->dev
->name
,
2431 slave
->speed
, slave
->duplex
? "full" : "half");
2433 /* notify ad that the link status has changed */
2434 if (bond
->params
.mode
== BOND_MODE_8023AD
)
2435 bond_3ad_handle_link_change(slave
, BOND_LINK_UP
);
2437 if (bond_is_lb(bond
))
2438 bond_alb_handle_link_change(bond
, slave
,
2441 if (!bond
->curr_active_slave
||
2442 (slave
== bond
->primary_slave
))
2447 case BOND_LINK_DOWN
:
2448 if (slave
->link_failure_count
< UINT_MAX
)
2449 slave
->link_failure_count
++;
2451 slave
->link
= BOND_LINK_DOWN
;
2453 if (bond
->params
.mode
== BOND_MODE_ACTIVEBACKUP
||
2454 bond
->params
.mode
== BOND_MODE_8023AD
)
2455 bond_set_slave_inactive_flags(slave
);
2457 pr_info("%s: link status definitely down for interface %s, disabling it\n",
2458 bond
->dev
->name
, slave
->dev
->name
);
2460 if (bond
->params
.mode
== BOND_MODE_8023AD
)
2461 bond_3ad_handle_link_change(slave
,
2464 if (bond_is_lb(bond
))
2465 bond_alb_handle_link_change(bond
, slave
,
2468 if (slave
== bond
->curr_active_slave
)
2474 pr_err("%s: invalid new link %d on slave %s\n",
2475 bond
->dev
->name
, slave
->new_link
,
2477 slave
->new_link
= BOND_LINK_NOCHANGE
;
2485 write_lock_bh(&bond
->curr_slave_lock
);
2486 bond_select_active_slave(bond
);
2487 write_unlock_bh(&bond
->curr_slave_lock
);
2488 unblock_netpoll_tx();
2491 bond_set_carrier(bond
);
2497 * Really a wrapper that splits the mii monitor into two phases: an
2498 * inspection, then (if inspection indicates something needs to be done)
2499 * an acquisition of appropriate locks followed by a commit phase to
2500 * implement whatever link state changes are indicated.
2502 void bond_mii_monitor(struct work_struct
*work
)
2504 struct bonding
*bond
= container_of(work
, struct bonding
,
2506 bool should_notify_peers
= false;
2507 unsigned long delay
;
2509 read_lock(&bond
->lock
);
2511 delay
= msecs_to_jiffies(bond
->params
.miimon
);
2513 if (bond
->slave_cnt
== 0)
2516 should_notify_peers
= bond_should_notify_peers(bond
);
2518 if (bond_miimon_inspect(bond
)) {
2519 read_unlock(&bond
->lock
);
2521 /* Race avoidance with bond_close cancel of workqueue */
2522 if (!rtnl_trylock()) {
2523 read_lock(&bond
->lock
);
2525 should_notify_peers
= false;
2529 read_lock(&bond
->lock
);
2531 bond_miimon_commit(bond
);
2533 read_unlock(&bond
->lock
);
2534 rtnl_unlock(); /* might sleep, hold no other locks */
2535 read_lock(&bond
->lock
);
2539 if (bond
->params
.miimon
)
2540 queue_delayed_work(bond
->wq
, &bond
->mii_work
, delay
);
2542 read_unlock(&bond
->lock
);
2544 if (should_notify_peers
) {
2545 if (!rtnl_trylock()) {
2546 read_lock(&bond
->lock
);
2547 bond
->send_peer_notif
++;
2548 read_unlock(&bond
->lock
);
2551 netdev_bonding_change(bond
->dev
, NETDEV_NOTIFY_PEERS
);
2556 static int bond_has_this_ip(struct bonding
*bond
, __be32 ip
)
2558 struct vlan_entry
*vlan
;
2560 if (ip
== bond
->master_ip
)
2563 list_for_each_entry(vlan
, &bond
->vlan_list
, vlan_list
) {
2564 if (ip
== vlan
->vlan_ip
)
2572 * We go to the (large) trouble of VLAN tagging ARP frames because
2573 * switches in VLAN mode (especially if ports are configured as
2574 * "native" to a VLAN) might not pass non-tagged frames.
2576 static void bond_arp_send(struct net_device
*slave_dev
, int arp_op
, __be32 dest_ip
, __be32 src_ip
, unsigned short vlan_id
)
2578 struct sk_buff
*skb
;
2580 pr_debug("arp %d on slave %s: dst %x src %x vid %d\n", arp_op
,
2581 slave_dev
->name
, dest_ip
, src_ip
, vlan_id
);
2583 skb
= arp_create(arp_op
, ETH_P_ARP
, dest_ip
, slave_dev
, src_ip
,
2584 NULL
, slave_dev
->dev_addr
, NULL
);
2587 pr_err("ARP packet allocation failed\n");
2591 skb
= vlan_put_tag(skb
, vlan_id
);
2593 pr_err("failed to insert VLAN tag\n");
2601 static void bond_arp_send_all(struct bonding
*bond
, struct slave
*slave
)
2604 __be32
*targets
= bond
->params
.arp_targets
;
2605 struct vlan_entry
*vlan
;
2606 struct net_device
*vlan_dev
;
2609 for (i
= 0; (i
< BOND_MAX_ARP_TARGETS
); i
++) {
2612 pr_debug("basa: target %x\n", targets
[i
]);
2613 if (!bond_vlan_used(bond
)) {
2614 pr_debug("basa: empty vlan: arp_send\n");
2615 bond_arp_send(slave
->dev
, ARPOP_REQUEST
, targets
[i
],
2616 bond
->master_ip
, 0);
2621 * If VLANs are configured, we do a route lookup to
2622 * determine which VLAN interface would be used, so we
2623 * can tag the ARP with the proper VLAN tag.
2625 rt
= ip_route_output(dev_net(bond
->dev
), targets
[i
], 0,
2628 if (net_ratelimit()) {
2629 pr_warning("%s: no route to arp_ip_target %pI4\n",
2630 bond
->dev
->name
, &targets
[i
]);
2636 * This target is not on a VLAN
2638 if (rt
->dst
.dev
== bond
->dev
) {
2640 pr_debug("basa: rtdev == bond->dev: arp_send\n");
2641 bond_arp_send(slave
->dev
, ARPOP_REQUEST
, targets
[i
],
2642 bond
->master_ip
, 0);
2647 list_for_each_entry(vlan
, &bond
->vlan_list
, vlan_list
) {
2649 vlan_dev
= __vlan_find_dev_deep(bond
->dev
,
2652 if (vlan_dev
== rt
->dst
.dev
) {
2653 vlan_id
= vlan
->vlan_id
;
2654 pr_debug("basa: vlan match on %s %d\n",
2655 vlan_dev
->name
, vlan_id
);
2662 bond_arp_send(slave
->dev
, ARPOP_REQUEST
, targets
[i
],
2663 vlan
->vlan_ip
, vlan_id
);
2667 if (net_ratelimit()) {
2668 pr_warning("%s: no path to arp_ip_target %pI4 via rt.dev %s\n",
2669 bond
->dev
->name
, &targets
[i
],
2670 rt
->dst
.dev
? rt
->dst
.dev
->name
: "NULL");
2676 static void bond_validate_arp(struct bonding
*bond
, struct slave
*slave
, __be32 sip
, __be32 tip
)
2679 __be32
*targets
= bond
->params
.arp_targets
;
2681 for (i
= 0; (i
< BOND_MAX_ARP_TARGETS
) && targets
[i
]; i
++) {
2682 pr_debug("bva: sip %pI4 tip %pI4 t[%d] %pI4 bhti(tip) %d\n",
2683 &sip
, &tip
, i
, &targets
[i
],
2684 bond_has_this_ip(bond
, tip
));
2685 if (sip
== targets
[i
]) {
2686 if (bond_has_this_ip(bond
, tip
))
2687 slave
->last_arp_rx
= jiffies
;
2693 static void bond_arp_rcv(struct sk_buff
*skb
, struct bonding
*bond
,
2694 struct slave
*slave
)
2697 unsigned char *arp_ptr
;
2700 if (skb
->protocol
!= __cpu_to_be16(ETH_P_ARP
))
2703 read_lock(&bond
->lock
);
2705 pr_debug("bond_arp_rcv: bond %s skb->dev %s\n",
2706 bond
->dev
->name
, skb
->dev
->name
);
2708 if (!pskb_may_pull(skb
, arp_hdr_len(bond
->dev
)))
2712 if (arp
->ar_hln
!= bond
->dev
->addr_len
||
2713 skb
->pkt_type
== PACKET_OTHERHOST
||
2714 skb
->pkt_type
== PACKET_LOOPBACK
||
2715 arp
->ar_hrd
!= htons(ARPHRD_ETHER
) ||
2716 arp
->ar_pro
!= htons(ETH_P_IP
) ||
2720 arp_ptr
= (unsigned char *)(arp
+ 1);
2721 arp_ptr
+= bond
->dev
->addr_len
;
2722 memcpy(&sip
, arp_ptr
, 4);
2723 arp_ptr
+= 4 + bond
->dev
->addr_len
;
2724 memcpy(&tip
, arp_ptr
, 4);
2726 pr_debug("bond_arp_rcv: %s %s/%d av %d sv %d sip %pI4 tip %pI4\n",
2727 bond
->dev
->name
, slave
->dev
->name
, bond_slave_state(slave
),
2728 bond
->params
.arp_validate
, slave_do_arp_validate(bond
, slave
),
2732 * Backup slaves won't see the ARP reply, but do come through
2733 * here for each ARP probe (so we swap the sip/tip to validate
2734 * the probe). In a "redundant switch, common router" type of
2735 * configuration, the ARP probe will (hopefully) travel from
2736 * the active, through one switch, the router, then the other
2737 * switch before reaching the backup.
2739 if (bond_is_active_slave(slave
))
2740 bond_validate_arp(bond
, slave
, sip
, tip
);
2742 bond_validate_arp(bond
, slave
, tip
, sip
);
2745 read_unlock(&bond
->lock
);
2749 * this function is called regularly to monitor each slave's link
2750 * ensuring that traffic is being sent and received when arp monitoring
2751 * is used in load-balancing mode. if the adapter has been dormant, then an
2752 * arp is transmitted to generate traffic. see activebackup_arp_monitor for
2753 * arp monitoring in active backup mode.
2755 void bond_loadbalance_arp_mon(struct work_struct
*work
)
2757 struct bonding
*bond
= container_of(work
, struct bonding
,
2759 struct slave
*slave
, *oldcurrent
;
2760 int do_failover
= 0;
2764 read_lock(&bond
->lock
);
2766 delta_in_ticks
= msecs_to_jiffies(bond
->params
.arp_interval
);
2768 if (bond
->slave_cnt
== 0)
2771 read_lock(&bond
->curr_slave_lock
);
2772 oldcurrent
= bond
->curr_active_slave
;
2773 read_unlock(&bond
->curr_slave_lock
);
2775 /* see if any of the previous devices are up now (i.e. they have
2776 * xmt and rcv traffic). the curr_active_slave does not come into
2777 * the picture unless it is null. also, slave->jiffies is not needed
2778 * here because we send an arp on each slave and give a slave as
2779 * long as it needs to get the tx/rx within the delta.
2780 * TODO: what about up/down delay in arp mode? it wasn't here before
2783 bond_for_each_slave(bond
, slave
, i
) {
2784 unsigned long trans_start
= dev_trans_start(slave
->dev
);
2786 if (slave
->link
!= BOND_LINK_UP
) {
2787 if (time_in_range(jiffies
,
2788 trans_start
- delta_in_ticks
,
2789 trans_start
+ delta_in_ticks
) &&
2790 time_in_range(jiffies
,
2791 slave
->dev
->last_rx
- delta_in_ticks
,
2792 slave
->dev
->last_rx
+ delta_in_ticks
)) {
2794 slave
->link
= BOND_LINK_UP
;
2795 bond_set_active_slave(slave
);
2797 /* primary_slave has no meaning in round-robin
2798 * mode. the window of a slave being up and
2799 * curr_active_slave being null after enslaving
2803 pr_info("%s: link status definitely up for interface %s, ",
2808 pr_info("%s: interface %s is now up\n",
2814 /* slave->link == BOND_LINK_UP */
2816 /* not all switches will respond to an arp request
2817 * when the source ip is 0, so don't take the link down
2818 * if we don't know our ip yet
2820 if (!time_in_range(jiffies
,
2821 trans_start
- delta_in_ticks
,
2822 trans_start
+ 2 * delta_in_ticks
) ||
2823 !time_in_range(jiffies
,
2824 slave
->dev
->last_rx
- delta_in_ticks
,
2825 slave
->dev
->last_rx
+ 2 * delta_in_ticks
)) {
2827 slave
->link
= BOND_LINK_DOWN
;
2828 bond_set_backup_slave(slave
);
2830 if (slave
->link_failure_count
< UINT_MAX
)
2831 slave
->link_failure_count
++;
2833 pr_info("%s: interface %s is now down.\n",
2837 if (slave
== oldcurrent
)
2842 /* note: if switch is in round-robin mode, all links
2843 * must tx arp to ensure all links rx an arp - otherwise
2844 * links may oscillate or not come up at all; if switch is
2845 * in something like xor mode, there is nothing we can
2846 * do - all replies will be rx'ed on same link causing slaves
2847 * to be unstable during low/no traffic periods
2849 if (IS_UP(slave
->dev
))
2850 bond_arp_send_all(bond
, slave
);
2855 write_lock_bh(&bond
->curr_slave_lock
);
2857 bond_select_active_slave(bond
);
2859 write_unlock_bh(&bond
->curr_slave_lock
);
2860 unblock_netpoll_tx();
2864 if (bond
->params
.arp_interval
)
2865 queue_delayed_work(bond
->wq
, &bond
->arp_work
, delta_in_ticks
);
2867 read_unlock(&bond
->lock
);
2871 * Called to inspect slaves for active-backup mode ARP monitor link state
2872 * changes. Sets new_link in slaves to specify what action should take
2873 * place for the slave. Returns 0 if no changes are found, >0 if changes
2874 * to link states must be committed.
2876 * Called with bond->lock held for read.
2878 static int bond_ab_arp_inspect(struct bonding
*bond
, int delta_in_ticks
)
2880 struct slave
*slave
;
2882 unsigned long trans_start
;
2884 bond_for_each_slave(bond
, slave
, i
) {
2885 slave
->new_link
= BOND_LINK_NOCHANGE
;
2887 if (slave
->link
!= BOND_LINK_UP
) {
2888 if (time_in_range(jiffies
,
2889 slave_last_rx(bond
, slave
) - delta_in_ticks
,
2890 slave_last_rx(bond
, slave
) + delta_in_ticks
)) {
2892 slave
->new_link
= BOND_LINK_UP
;
2900 * Give slaves 2*delta after being enslaved or made
2901 * active. This avoids bouncing, as the last receive
2902 * times need a full ARP monitor cycle to be updated.
2904 if (time_in_range(jiffies
,
2905 slave
->jiffies
- delta_in_ticks
,
2906 slave
->jiffies
+ 2 * delta_in_ticks
))
2910 * Backup slave is down if:
2911 * - No current_arp_slave AND
2912 * - more than 3*delta since last receive AND
2913 * - the bond has an IP address
2915 * Note: a non-null current_arp_slave indicates
2916 * the curr_active_slave went down and we are
2917 * searching for a new one; under this condition
2918 * we only take the curr_active_slave down - this
2919 * gives each slave a chance to tx/rx traffic
2920 * before being taken out
2922 if (!bond_is_active_slave(slave
) &&
2923 !bond
->current_arp_slave
&&
2924 !time_in_range(jiffies
,
2925 slave_last_rx(bond
, slave
) - delta_in_ticks
,
2926 slave_last_rx(bond
, slave
) + 3 * delta_in_ticks
)) {
2928 slave
->new_link
= BOND_LINK_DOWN
;
2933 * Active slave is down if:
2934 * - more than 2*delta since transmitting OR
2935 * - (more than 2*delta since receive AND
2936 * the bond has an IP address)
2938 trans_start
= dev_trans_start(slave
->dev
);
2939 if (bond_is_active_slave(slave
) &&
2940 (!time_in_range(jiffies
,
2941 trans_start
- delta_in_ticks
,
2942 trans_start
+ 2 * delta_in_ticks
) ||
2943 !time_in_range(jiffies
,
2944 slave_last_rx(bond
, slave
) - delta_in_ticks
,
2945 slave_last_rx(bond
, slave
) + 2 * delta_in_ticks
))) {
2947 slave
->new_link
= BOND_LINK_DOWN
;
2956 * Called to commit link state changes noted by inspection step of
2957 * active-backup mode ARP monitor.
2959 * Called with RTNL and bond->lock for read.
2961 static void bond_ab_arp_commit(struct bonding
*bond
, int delta_in_ticks
)
2963 struct slave
*slave
;
2965 unsigned long trans_start
;
2967 bond_for_each_slave(bond
, slave
, i
) {
2968 switch (slave
->new_link
) {
2969 case BOND_LINK_NOCHANGE
:
2973 trans_start
= dev_trans_start(slave
->dev
);
2974 if ((!bond
->curr_active_slave
&&
2975 time_in_range(jiffies
,
2976 trans_start
- delta_in_ticks
,
2977 trans_start
+ delta_in_ticks
)) ||
2978 bond
->curr_active_slave
!= slave
) {
2979 slave
->link
= BOND_LINK_UP
;
2980 bond
->current_arp_slave
= NULL
;
2982 pr_info("%s: link status definitely up for interface %s.\n",
2983 bond
->dev
->name
, slave
->dev
->name
);
2985 if (!bond
->curr_active_slave
||
2986 (slave
== bond
->primary_slave
))
2993 case BOND_LINK_DOWN
:
2994 if (slave
->link_failure_count
< UINT_MAX
)
2995 slave
->link_failure_count
++;
2997 slave
->link
= BOND_LINK_DOWN
;
2998 bond_set_slave_inactive_flags(slave
);
3000 pr_info("%s: link status definitely down for interface %s, disabling it\n",
3001 bond
->dev
->name
, slave
->dev
->name
);
3003 if (slave
== bond
->curr_active_slave
) {
3004 bond
->current_arp_slave
= NULL
;
3011 pr_err("%s: impossible: new_link %d on slave %s\n",
3012 bond
->dev
->name
, slave
->new_link
,
3020 write_lock_bh(&bond
->curr_slave_lock
);
3021 bond_select_active_slave(bond
);
3022 write_unlock_bh(&bond
->curr_slave_lock
);
3023 unblock_netpoll_tx();
3026 bond_set_carrier(bond
);
3030 * Send ARP probes for active-backup mode ARP monitor.
3032 * Called with bond->lock held for read.
3034 static void bond_ab_arp_probe(struct bonding
*bond
)
3036 struct slave
*slave
;
3039 read_lock(&bond
->curr_slave_lock
);
3041 if (bond
->current_arp_slave
&& bond
->curr_active_slave
)
3042 pr_info("PROBE: c_arp %s && cas %s BAD\n",
3043 bond
->current_arp_slave
->dev
->name
,
3044 bond
->curr_active_slave
->dev
->name
);
3046 if (bond
->curr_active_slave
) {
3047 bond_arp_send_all(bond
, bond
->curr_active_slave
);
3048 read_unlock(&bond
->curr_slave_lock
);
3052 read_unlock(&bond
->curr_slave_lock
);
3054 /* if we don't have a curr_active_slave, search for the next available
3055 * backup slave from the current_arp_slave and make it the candidate
3056 * for becoming the curr_active_slave
3059 if (!bond
->current_arp_slave
) {
3060 bond
->current_arp_slave
= bond
->first_slave
;
3061 if (!bond
->current_arp_slave
)
3065 bond_set_slave_inactive_flags(bond
->current_arp_slave
);
3067 /* search for next candidate */
3068 bond_for_each_slave_from(bond
, slave
, i
, bond
->current_arp_slave
->next
) {
3069 if (IS_UP(slave
->dev
)) {
3070 slave
->link
= BOND_LINK_BACK
;
3071 bond_set_slave_active_flags(slave
);
3072 bond_arp_send_all(bond
, slave
);
3073 slave
->jiffies
= jiffies
;
3074 bond
->current_arp_slave
= slave
;
3078 /* if the link state is up at this point, we
3079 * mark it down - this can happen if we have
3080 * simultaneous link failures and
3081 * reselect_active_interface doesn't make this
3082 * one the current slave so it is still marked
3083 * up when it is actually down
3085 if (slave
->link
== BOND_LINK_UP
) {
3086 slave
->link
= BOND_LINK_DOWN
;
3087 if (slave
->link_failure_count
< UINT_MAX
)
3088 slave
->link_failure_count
++;
3090 bond_set_slave_inactive_flags(slave
);
3092 pr_info("%s: backup interface %s is now down.\n",
3093 bond
->dev
->name
, slave
->dev
->name
);
3098 void bond_activebackup_arp_mon(struct work_struct
*work
)
3100 struct bonding
*bond
= container_of(work
, struct bonding
,
3102 bool should_notify_peers
= false;
3105 read_lock(&bond
->lock
);
3107 delta_in_ticks
= msecs_to_jiffies(bond
->params
.arp_interval
);
3109 if (bond
->slave_cnt
== 0)
3112 should_notify_peers
= bond_should_notify_peers(bond
);
3114 if (bond_ab_arp_inspect(bond
, delta_in_ticks
)) {
3115 read_unlock(&bond
->lock
);
3117 /* Race avoidance with bond_close flush of workqueue */
3118 if (!rtnl_trylock()) {
3119 read_lock(&bond
->lock
);
3121 should_notify_peers
= false;
3125 read_lock(&bond
->lock
);
3127 bond_ab_arp_commit(bond
, delta_in_ticks
);
3129 read_unlock(&bond
->lock
);
3131 read_lock(&bond
->lock
);
3134 bond_ab_arp_probe(bond
);
3137 if (bond
->params
.arp_interval
)
3138 queue_delayed_work(bond
->wq
, &bond
->arp_work
, delta_in_ticks
);
3140 read_unlock(&bond
->lock
);
3142 if (should_notify_peers
) {
3143 if (!rtnl_trylock()) {
3144 read_lock(&bond
->lock
);
3145 bond
->send_peer_notif
++;
3146 read_unlock(&bond
->lock
);
3149 netdev_bonding_change(bond
->dev
, NETDEV_NOTIFY_PEERS
);
3154 /*-------------------------- netdev event handling --------------------------*/
3157 * Change device name
3159 static int bond_event_changename(struct bonding
*bond
)
3161 bond_remove_proc_entry(bond
);
3162 bond_create_proc_entry(bond
);
3164 bond_debug_reregister(bond
);
3169 static int bond_master_netdev_event(unsigned long event
,
3170 struct net_device
*bond_dev
)
3172 struct bonding
*event_bond
= netdev_priv(bond_dev
);
3175 case NETDEV_CHANGENAME
:
3176 return bond_event_changename(event_bond
);
3184 static int bond_slave_netdev_event(unsigned long event
,
3185 struct net_device
*slave_dev
)
3187 struct net_device
*bond_dev
= slave_dev
->master
;
3188 struct bonding
*bond
= netdev_priv(bond_dev
);
3189 struct slave
*slave
= NULL
;
3192 case NETDEV_UNREGISTER
:
3194 if (bond
->setup_by_slave
)
3195 bond_release_and_destroy(bond_dev
, slave_dev
);
3197 bond_release(bond_dev
, slave_dev
);
3202 slave
= bond_get_slave_by_dev(bond
, slave_dev
);
3204 u32 old_speed
= slave
->speed
;
3205 u8 old_duplex
= slave
->duplex
;
3207 bond_update_speed_duplex(slave
);
3209 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
3210 if (old_speed
!= slave
->speed
)
3211 bond_3ad_adapter_speed_changed(slave
);
3212 if (old_duplex
!= slave
->duplex
)
3213 bond_3ad_adapter_duplex_changed(slave
);
3220 * ... Or is it this?
3223 case NETDEV_CHANGEMTU
:
3225 * TODO: Should slaves be allowed to
3226 * independently alter their MTU? For
3227 * an active-backup bond, slaves need
3228 * not be the same type of device, so
3229 * MTUs may vary. For other modes,
3230 * slaves arguably should have the
3231 * same MTUs. To do this, we'd need to
3232 * take over the slave's change_mtu
3233 * function for the duration of their
3237 case NETDEV_CHANGENAME
:
3239 * TODO: handle changing the primary's name
3242 case NETDEV_FEAT_CHANGE
:
3243 bond_compute_features(bond
);
3253 * bond_netdev_event: handle netdev notifier chain events.
3255 * This function receives events for the netdev chain. The caller (an
3256 * ioctl handler calling blocking_notifier_call_chain) holds the necessary
3257 * locks for us to safely manipulate the slave devices (RTNL lock,
3260 static int bond_netdev_event(struct notifier_block
*this,
3261 unsigned long event
, void *ptr
)
3263 struct net_device
*event_dev
= (struct net_device
*)ptr
;
3265 pr_debug("event_dev: %s, event: %lx\n",
3266 event_dev
? event_dev
->name
: "None",
3269 if (!(event_dev
->priv_flags
& IFF_BONDING
))
3272 if (event_dev
->flags
& IFF_MASTER
) {
3273 pr_debug("IFF_MASTER\n");
3274 return bond_master_netdev_event(event
, event_dev
);
3277 if (event_dev
->flags
& IFF_SLAVE
) {
3278 pr_debug("IFF_SLAVE\n");
3279 return bond_slave_netdev_event(event
, event_dev
);
3286 * bond_inetaddr_event: handle inetaddr notifier chain events.
3288 * We keep track of device IPs primarily to use as source addresses in
3289 * ARP monitor probes (rather than spewing out broadcasts all the time).
3291 * We track one IP for the main device (if it has one), plus one per VLAN.
3293 static int bond_inetaddr_event(struct notifier_block
*this, unsigned long event
, void *ptr
)
3295 struct in_ifaddr
*ifa
= ptr
;
3296 struct net_device
*vlan_dev
, *event_dev
= ifa
->ifa_dev
->dev
;
3297 struct bond_net
*bn
= net_generic(dev_net(event_dev
), bond_net_id
);
3298 struct bonding
*bond
;
3299 struct vlan_entry
*vlan
;
3301 /* we only care about primary address */
3302 if(ifa
->ifa_flags
& IFA_F_SECONDARY
)
3305 list_for_each_entry(bond
, &bn
->dev_list
, bond_list
) {
3306 if (bond
->dev
== event_dev
) {
3309 bond
->master_ip
= ifa
->ifa_local
;
3312 bond
->master_ip
= 0;
3319 list_for_each_entry(vlan
, &bond
->vlan_list
, vlan_list
) {
3320 vlan_dev
= __vlan_find_dev_deep(bond
->dev
,
3322 if (vlan_dev
== event_dev
) {
3325 vlan
->vlan_ip
= ifa
->ifa_local
;
3339 static struct notifier_block bond_netdev_notifier
= {
3340 .notifier_call
= bond_netdev_event
,
3343 static struct notifier_block bond_inetaddr_notifier
= {
3344 .notifier_call
= bond_inetaddr_event
,
3347 /*---------------------------- Hashing Policies -----------------------------*/
3350 * Hash for the output device based upon layer 2 and layer 3 data. If
3351 * the packet is not IP mimic bond_xmit_hash_policy_l2()
3353 static int bond_xmit_hash_policy_l23(struct sk_buff
*skb
, int count
)
3355 struct ethhdr
*data
= (struct ethhdr
*)skb
->data
;
3356 struct iphdr
*iph
= ip_hdr(skb
);
3358 if (skb
->protocol
== htons(ETH_P_IP
)) {
3359 return ((ntohl(iph
->saddr
^ iph
->daddr
) & 0xffff) ^
3360 (data
->h_dest
[5] ^ data
->h_source
[5])) % count
;
3363 return (data
->h_dest
[5] ^ data
->h_source
[5]) % count
;
3367 * Hash for the output device based upon layer 3 and layer 4 data. If
3368 * the packet is a frag or not TCP or UDP, just use layer 3 data. If it is
3369 * altogether not IP, mimic bond_xmit_hash_policy_l2()
3371 static int bond_xmit_hash_policy_l34(struct sk_buff
*skb
, int count
)
3373 struct ethhdr
*data
= (struct ethhdr
*)skb
->data
;
3374 struct iphdr
*iph
= ip_hdr(skb
);
3375 __be16
*layer4hdr
= (__be16
*)((u32
*)iph
+ iph
->ihl
);
3378 if (skb
->protocol
== htons(ETH_P_IP
)) {
3379 if (!ip_is_fragment(iph
) &&
3380 (iph
->protocol
== IPPROTO_TCP
||
3381 iph
->protocol
== IPPROTO_UDP
)) {
3382 layer4_xor
= ntohs((*layer4hdr
^ *(layer4hdr
+ 1)));
3384 return (layer4_xor
^
3385 ((ntohl(iph
->saddr
^ iph
->daddr
)) & 0xffff)) % count
;
3389 return (data
->h_dest
[5] ^ data
->h_source
[5]) % count
;
3393 * Hash for the output device based upon layer 2 data
3395 static int bond_xmit_hash_policy_l2(struct sk_buff
*skb
, int count
)
3397 struct ethhdr
*data
= (struct ethhdr
*)skb
->data
;
3399 return (data
->h_dest
[5] ^ data
->h_source
[5]) % count
;
3402 /*-------------------------- Device entry points ----------------------------*/
3404 static int bond_open(struct net_device
*bond_dev
)
3406 struct bonding
*bond
= netdev_priv(bond_dev
);
3407 struct slave
*slave
;
3410 /* reset slave->backup and slave->inactive */
3411 read_lock(&bond
->lock
);
3412 if (bond
->slave_cnt
> 0) {
3413 read_lock(&bond
->curr_slave_lock
);
3414 bond_for_each_slave(bond
, slave
, i
) {
3415 if ((bond
->params
.mode
== BOND_MODE_ACTIVEBACKUP
)
3416 && (slave
!= bond
->curr_active_slave
)) {
3417 bond_set_slave_inactive_flags(slave
);
3419 bond_set_slave_active_flags(slave
);
3422 read_unlock(&bond
->curr_slave_lock
);
3424 read_unlock(&bond
->lock
);
3426 INIT_DELAYED_WORK(&bond
->mcast_work
, bond_resend_igmp_join_requests_delayed
);
3428 if (bond_is_lb(bond
)) {
3429 /* bond_alb_initialize must be called before the timer
3432 if (bond_alb_initialize(bond
, (bond
->params
.mode
== BOND_MODE_ALB
))) {
3433 /* something went wrong - fail the open operation */
3437 INIT_DELAYED_WORK(&bond
->alb_work
, bond_alb_monitor
);
3438 queue_delayed_work(bond
->wq
, &bond
->alb_work
, 0);
3441 if (bond
->params
.miimon
) { /* link check interval, in milliseconds. */
3442 INIT_DELAYED_WORK(&bond
->mii_work
, bond_mii_monitor
);
3443 queue_delayed_work(bond
->wq
, &bond
->mii_work
, 0);
3446 if (bond
->params
.arp_interval
) { /* arp interval, in milliseconds. */
3447 if (bond
->params
.mode
== BOND_MODE_ACTIVEBACKUP
)
3448 INIT_DELAYED_WORK(&bond
->arp_work
,
3449 bond_activebackup_arp_mon
);
3451 INIT_DELAYED_WORK(&bond
->arp_work
,
3452 bond_loadbalance_arp_mon
);
3454 queue_delayed_work(bond
->wq
, &bond
->arp_work
, 0);
3455 if (bond
->params
.arp_validate
)
3456 bond
->recv_probe
= bond_arp_rcv
;
3459 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
3460 INIT_DELAYED_WORK(&bond
->ad_work
, bond_3ad_state_machine_handler
);
3461 queue_delayed_work(bond
->wq
, &bond
->ad_work
, 0);
3462 /* register to receive LACPDUs */
3463 bond
->recv_probe
= bond_3ad_lacpdu_recv
;
3464 bond_3ad_initiate_agg_selection(bond
, 1);
3470 static int bond_close(struct net_device
*bond_dev
)
3472 struct bonding
*bond
= netdev_priv(bond_dev
);
3474 write_lock_bh(&bond
->lock
);
3476 bond
->send_peer_notif
= 0;
3478 write_unlock_bh(&bond
->lock
);
3480 if (bond
->params
.miimon
) { /* link check interval, in milliseconds. */
3481 cancel_delayed_work_sync(&bond
->mii_work
);
3484 if (bond
->params
.arp_interval
) { /* arp interval, in milliseconds. */
3485 cancel_delayed_work_sync(&bond
->arp_work
);
3488 switch (bond
->params
.mode
) {
3489 case BOND_MODE_8023AD
:
3490 cancel_delayed_work_sync(&bond
->ad_work
);
3494 cancel_delayed_work_sync(&bond
->alb_work
);
3500 if (delayed_work_pending(&bond
->mcast_work
))
3501 cancel_delayed_work_sync(&bond
->mcast_work
);
3503 if (bond_is_lb(bond
)) {
3504 /* Must be called only after all
3505 * slaves have been released
3507 bond_alb_deinitialize(bond
);
3509 bond
->recv_probe
= NULL
;
3514 static struct rtnl_link_stats64
*bond_get_stats(struct net_device
*bond_dev
,
3515 struct rtnl_link_stats64
*stats
)
3517 struct bonding
*bond
= netdev_priv(bond_dev
);
3518 struct rtnl_link_stats64 temp
;
3519 struct slave
*slave
;
3522 memset(stats
, 0, sizeof(*stats
));
3524 read_lock_bh(&bond
->lock
);
3526 bond_for_each_slave(bond
, slave
, i
) {
3527 const struct rtnl_link_stats64
*sstats
=
3528 dev_get_stats(slave
->dev
, &temp
);
3530 stats
->rx_packets
+= sstats
->rx_packets
;
3531 stats
->rx_bytes
+= sstats
->rx_bytes
;
3532 stats
->rx_errors
+= sstats
->rx_errors
;
3533 stats
->rx_dropped
+= sstats
->rx_dropped
;
3535 stats
->tx_packets
+= sstats
->tx_packets
;
3536 stats
->tx_bytes
+= sstats
->tx_bytes
;
3537 stats
->tx_errors
+= sstats
->tx_errors
;
3538 stats
->tx_dropped
+= sstats
->tx_dropped
;
3540 stats
->multicast
+= sstats
->multicast
;
3541 stats
->collisions
+= sstats
->collisions
;
3543 stats
->rx_length_errors
+= sstats
->rx_length_errors
;
3544 stats
->rx_over_errors
+= sstats
->rx_over_errors
;
3545 stats
->rx_crc_errors
+= sstats
->rx_crc_errors
;
3546 stats
->rx_frame_errors
+= sstats
->rx_frame_errors
;
3547 stats
->rx_fifo_errors
+= sstats
->rx_fifo_errors
;
3548 stats
->rx_missed_errors
+= sstats
->rx_missed_errors
;
3550 stats
->tx_aborted_errors
+= sstats
->tx_aborted_errors
;
3551 stats
->tx_carrier_errors
+= sstats
->tx_carrier_errors
;
3552 stats
->tx_fifo_errors
+= sstats
->tx_fifo_errors
;
3553 stats
->tx_heartbeat_errors
+= sstats
->tx_heartbeat_errors
;
3554 stats
->tx_window_errors
+= sstats
->tx_window_errors
;
3557 read_unlock_bh(&bond
->lock
);
3562 static int bond_do_ioctl(struct net_device
*bond_dev
, struct ifreq
*ifr
, int cmd
)
3564 struct net_device
*slave_dev
= NULL
;
3565 struct ifbond k_binfo
;
3566 struct ifbond __user
*u_binfo
= NULL
;
3567 struct ifslave k_sinfo
;
3568 struct ifslave __user
*u_sinfo
= NULL
;
3569 struct mii_ioctl_data
*mii
= NULL
;
3572 pr_debug("bond_ioctl: master=%s, cmd=%d\n", bond_dev
->name
, cmd
);
3584 * We do this again just in case we were called by SIOCGMIIREG
3585 * instead of SIOCGMIIPHY.
3592 if (mii
->reg_num
== 1) {
3593 struct bonding
*bond
= netdev_priv(bond_dev
);
3595 read_lock(&bond
->lock
);
3596 read_lock(&bond
->curr_slave_lock
);
3597 if (netif_carrier_ok(bond
->dev
))
3598 mii
->val_out
= BMSR_LSTATUS
;
3600 read_unlock(&bond
->curr_slave_lock
);
3601 read_unlock(&bond
->lock
);
3605 case BOND_INFO_QUERY_OLD
:
3606 case SIOCBONDINFOQUERY
:
3607 u_binfo
= (struct ifbond __user
*)ifr
->ifr_data
;
3609 if (copy_from_user(&k_binfo
, u_binfo
, sizeof(ifbond
)))
3612 res
= bond_info_query(bond_dev
, &k_binfo
);
3614 copy_to_user(u_binfo
, &k_binfo
, sizeof(ifbond
)))
3618 case BOND_SLAVE_INFO_QUERY_OLD
:
3619 case SIOCBONDSLAVEINFOQUERY
:
3620 u_sinfo
= (struct ifslave __user
*)ifr
->ifr_data
;
3622 if (copy_from_user(&k_sinfo
, u_sinfo
, sizeof(ifslave
)))
3625 res
= bond_slave_info_query(bond_dev
, &k_sinfo
);
3627 copy_to_user(u_sinfo
, &k_sinfo
, sizeof(ifslave
)))
3636 if (!capable(CAP_NET_ADMIN
))
3639 slave_dev
= dev_get_by_name(dev_net(bond_dev
), ifr
->ifr_slave
);
3641 pr_debug("slave_dev=%p:\n", slave_dev
);
3646 pr_debug("slave_dev->name=%s:\n", slave_dev
->name
);
3648 case BOND_ENSLAVE_OLD
:
3649 case SIOCBONDENSLAVE
:
3650 res
= bond_enslave(bond_dev
, slave_dev
);
3652 case BOND_RELEASE_OLD
:
3653 case SIOCBONDRELEASE
:
3654 res
= bond_release(bond_dev
, slave_dev
);
3656 case BOND_SETHWADDR_OLD
:
3657 case SIOCBONDSETHWADDR
:
3658 res
= bond_sethwaddr(bond_dev
, slave_dev
);
3660 case BOND_CHANGE_ACTIVE_OLD
:
3661 case SIOCBONDCHANGEACTIVE
:
3662 res
= bond_ioctl_change_active(bond_dev
, slave_dev
);
3674 static bool bond_addr_in_mc_list(unsigned char *addr
,
3675 struct netdev_hw_addr_list
*list
,
3678 struct netdev_hw_addr
*ha
;
3680 netdev_hw_addr_list_for_each(ha
, list
)
3681 if (!memcmp(ha
->addr
, addr
, addrlen
))
3687 static void bond_change_rx_flags(struct net_device
*bond_dev
, int change
)
3689 struct bonding
*bond
= netdev_priv(bond_dev
);
3691 if (change
& IFF_PROMISC
)
3692 bond_set_promiscuity(bond
,
3693 bond_dev
->flags
& IFF_PROMISC
? 1 : -1);
3695 if (change
& IFF_ALLMULTI
)
3696 bond_set_allmulti(bond
,
3697 bond_dev
->flags
& IFF_ALLMULTI
? 1 : -1);
3700 static void bond_set_multicast_list(struct net_device
*bond_dev
)
3702 struct bonding
*bond
= netdev_priv(bond_dev
);
3703 struct netdev_hw_addr
*ha
;
3706 read_lock(&bond
->lock
);
3708 /* looking for addresses to add to slaves' mc list */
3709 netdev_for_each_mc_addr(ha
, bond_dev
) {
3710 found
= bond_addr_in_mc_list(ha
->addr
, &bond
->mc_list
,
3711 bond_dev
->addr_len
);
3713 bond_mc_add(bond
, ha
->addr
);
3716 /* looking for addresses to delete from slaves' list */
3717 netdev_hw_addr_list_for_each(ha
, &bond
->mc_list
) {
3718 found
= bond_addr_in_mc_list(ha
->addr
, &bond_dev
->mc
,
3719 bond_dev
->addr_len
);
3721 bond_mc_del(bond
, ha
->addr
);
3724 /* save master's multicast list */
3725 __hw_addr_flush(&bond
->mc_list
);
3726 __hw_addr_add_multiple(&bond
->mc_list
, &bond_dev
->mc
,
3727 bond_dev
->addr_len
, NETDEV_HW_ADDR_T_MULTICAST
);
3729 read_unlock(&bond
->lock
);
3732 static int bond_neigh_setup(struct net_device
*dev
, struct neigh_parms
*parms
)
3734 struct bonding
*bond
= netdev_priv(dev
);
3735 struct slave
*slave
= bond
->first_slave
;
3738 const struct net_device_ops
*slave_ops
3739 = slave
->dev
->netdev_ops
;
3740 if (slave_ops
->ndo_neigh_setup
)
3741 return slave_ops
->ndo_neigh_setup(slave
->dev
, parms
);
3747 * Change the MTU of all of a master's slaves to match the master
3749 static int bond_change_mtu(struct net_device
*bond_dev
, int new_mtu
)
3751 struct bonding
*bond
= netdev_priv(bond_dev
);
3752 struct slave
*slave
, *stop_at
;
3756 pr_debug("bond=%p, name=%s, new_mtu=%d\n", bond
,
3757 (bond_dev
? bond_dev
->name
: "None"), new_mtu
);
3759 /* Can't hold bond->lock with bh disabled here since
3760 * some base drivers panic. On the other hand we can't
3761 * hold bond->lock without bh disabled because we'll
3762 * deadlock. The only solution is to rely on the fact
3763 * that we're under rtnl_lock here, and the slaves
3764 * list won't change. This doesn't solve the problem
3765 * of setting the slave's MTU while it is
3766 * transmitting, but the assumption is that the base
3767 * driver can handle that.
3769 * TODO: figure out a way to safely iterate the slaves
3770 * list, but without holding a lock around the actual
3771 * call to the base driver.
3774 bond_for_each_slave(bond
, slave
, i
) {
3775 pr_debug("s %p s->p %p c_m %p\n",
3778 slave
->dev
->netdev_ops
->ndo_change_mtu
);
3780 res
= dev_set_mtu(slave
->dev
, new_mtu
);
3783 /* If we failed to set the slave's mtu to the new value
3784 * we must abort the operation even in ACTIVE_BACKUP
3785 * mode, because if we allow the backup slaves to have
3786 * different mtu values than the active slave we'll
3787 * need to change their mtu when doing a failover. That
3788 * means changing their mtu from timer context, which
3789 * is probably not a good idea.
3791 pr_debug("err %d %s\n", res
, slave
->dev
->name
);
3796 bond_dev
->mtu
= new_mtu
;
3801 /* unwind from head to the slave that failed */
3803 bond_for_each_slave_from_to(bond
, slave
, i
, bond
->first_slave
, stop_at
) {
3806 tmp_res
= dev_set_mtu(slave
->dev
, bond_dev
->mtu
);
3808 pr_debug("unwind err %d dev %s\n",
3809 tmp_res
, slave
->dev
->name
);
3819 * Note that many devices must be down to change the HW address, and
3820 * downing the master releases all slaves. We can make bonds full of
3821 * bonding devices to test this, however.
3823 static int bond_set_mac_address(struct net_device
*bond_dev
, void *addr
)
3825 struct bonding
*bond
= netdev_priv(bond_dev
);
3826 struct sockaddr
*sa
= addr
, tmp_sa
;
3827 struct slave
*slave
, *stop_at
;
3831 if (bond
->params
.mode
== BOND_MODE_ALB
)
3832 return bond_alb_set_mac_address(bond_dev
, addr
);
3835 pr_debug("bond=%p, name=%s\n",
3836 bond
, bond_dev
? bond_dev
->name
: "None");
3839 * If fail_over_mac is set to active, do nothing and return
3840 * success. Returning an error causes ifenslave to fail.
3842 if (bond
->params
.fail_over_mac
== BOND_FOM_ACTIVE
)
3845 if (!is_valid_ether_addr(sa
->sa_data
))
3846 return -EADDRNOTAVAIL
;
3848 /* Can't hold bond->lock with bh disabled here since
3849 * some base drivers panic. On the other hand we can't
3850 * hold bond->lock without bh disabled because we'll
3851 * deadlock. The only solution is to rely on the fact
3852 * that we're under rtnl_lock here, and the slaves
3853 * list won't change. This doesn't solve the problem
3854 * of setting the slave's hw address while it is
3855 * transmitting, but the assumption is that the base
3856 * driver can handle that.
3858 * TODO: figure out a way to safely iterate the slaves
3859 * list, but without holding a lock around the actual
3860 * call to the base driver.
3863 bond_for_each_slave(bond
, slave
, i
) {
3864 const struct net_device_ops
*slave_ops
= slave
->dev
->netdev_ops
;
3865 pr_debug("slave %p %s\n", slave
, slave
->dev
->name
);
3867 if (slave_ops
->ndo_set_mac_address
== NULL
) {
3869 pr_debug("EOPNOTSUPP %s\n", slave
->dev
->name
);
3873 res
= dev_set_mac_address(slave
->dev
, addr
);
3875 /* TODO: consider downing the slave
3877 * User should expect communications
3878 * breakage anyway until ARP finish
3881 pr_debug("err %d %s\n", res
, slave
->dev
->name
);
3887 memcpy(bond_dev
->dev_addr
, sa
->sa_data
, bond_dev
->addr_len
);
3891 memcpy(tmp_sa
.sa_data
, bond_dev
->dev_addr
, bond_dev
->addr_len
);
3892 tmp_sa
.sa_family
= bond_dev
->type
;
3894 /* unwind from head to the slave that failed */
3896 bond_for_each_slave_from_to(bond
, slave
, i
, bond
->first_slave
, stop_at
) {
3899 tmp_res
= dev_set_mac_address(slave
->dev
, &tmp_sa
);
3901 pr_debug("unwind err %d dev %s\n",
3902 tmp_res
, slave
->dev
->name
);
3909 static int bond_xmit_roundrobin(struct sk_buff
*skb
, struct net_device
*bond_dev
)
3911 struct bonding
*bond
= netdev_priv(bond_dev
);
3912 struct slave
*slave
, *start_at
;
3913 int i
, slave_no
, res
= 1;
3914 struct iphdr
*iph
= ip_hdr(skb
);
3917 * Start with the curr_active_slave that joined the bond as the
3918 * default for sending IGMP traffic. For failover purposes one
3919 * needs to maintain some consistency for the interface that will
3920 * send the join/membership reports. The curr_active_slave found
3921 * will send all of this type of traffic.
3923 if ((iph
->protocol
== IPPROTO_IGMP
) &&
3924 (skb
->protocol
== htons(ETH_P_IP
))) {
3926 read_lock(&bond
->curr_slave_lock
);
3927 slave
= bond
->curr_active_slave
;
3928 read_unlock(&bond
->curr_slave_lock
);
3934 * Concurrent TX may collide on rr_tx_counter; we accept
3935 * that as being rare enough not to justify using an
3938 slave_no
= bond
->rr_tx_counter
++ % bond
->slave_cnt
;
3940 bond_for_each_slave(bond
, slave
, i
) {
3948 bond_for_each_slave_from(bond
, slave
, i
, start_at
) {
3949 if (IS_UP(slave
->dev
) &&
3950 (slave
->link
== BOND_LINK_UP
) &&
3951 bond_is_active_slave(slave
)) {
3952 res
= bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
3959 /* no suitable interface, frame not sent */
3963 return NETDEV_TX_OK
;
3968 * in active-backup mode, we know that bond->curr_active_slave is always valid if
3969 * the bond has a usable interface.
3971 static int bond_xmit_activebackup(struct sk_buff
*skb
, struct net_device
*bond_dev
)
3973 struct bonding
*bond
= netdev_priv(bond_dev
);
3976 read_lock(&bond
->curr_slave_lock
);
3978 if (bond
->curr_active_slave
)
3979 res
= bond_dev_queue_xmit(bond
, skb
,
3980 bond
->curr_active_slave
->dev
);
3983 /* no suitable interface, frame not sent */
3986 read_unlock(&bond
->curr_slave_lock
);
3988 return NETDEV_TX_OK
;
3992 * In bond_xmit_xor() , we determine the output device by using a pre-
3993 * determined xmit_hash_policy(), If the selected device is not enabled,
3994 * find the next active slave.
3996 static int bond_xmit_xor(struct sk_buff
*skb
, struct net_device
*bond_dev
)
3998 struct bonding
*bond
= netdev_priv(bond_dev
);
3999 struct slave
*slave
, *start_at
;
4004 slave_no
= bond
->xmit_hash_policy(skb
, bond
->slave_cnt
);
4006 bond_for_each_slave(bond
, slave
, i
) {
4014 bond_for_each_slave_from(bond
, slave
, i
, start_at
) {
4015 if (IS_UP(slave
->dev
) &&
4016 (slave
->link
== BOND_LINK_UP
) &&
4017 bond_is_active_slave(slave
)) {
4018 res
= bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
4024 /* no suitable interface, frame not sent */
4028 return NETDEV_TX_OK
;
4032 * in broadcast mode, we send everything to all usable interfaces.
4034 static int bond_xmit_broadcast(struct sk_buff
*skb
, struct net_device
*bond_dev
)
4036 struct bonding
*bond
= netdev_priv(bond_dev
);
4037 struct slave
*slave
, *start_at
;
4038 struct net_device
*tx_dev
= NULL
;
4042 read_lock(&bond
->curr_slave_lock
);
4043 start_at
= bond
->curr_active_slave
;
4044 read_unlock(&bond
->curr_slave_lock
);
4049 bond_for_each_slave_from(bond
, slave
, i
, start_at
) {
4050 if (IS_UP(slave
->dev
) &&
4051 (slave
->link
== BOND_LINK_UP
) &&
4052 bond_is_active_slave(slave
)) {
4054 struct sk_buff
*skb2
= skb_clone(skb
, GFP_ATOMIC
);
4056 pr_err("%s: Error: bond_xmit_broadcast(): skb_clone() failed\n",
4061 res
= bond_dev_queue_xmit(bond
, skb2
, tx_dev
);
4063 dev_kfree_skb(skb2
);
4067 tx_dev
= slave
->dev
;
4072 res
= bond_dev_queue_xmit(bond
, skb
, tx_dev
);
4076 /* no suitable interface, frame not sent */
4079 /* frame sent to all suitable interfaces */
4080 return NETDEV_TX_OK
;
4083 /*------------------------- Device initialization ---------------------------*/
4085 static void bond_set_xmit_hash_policy(struct bonding
*bond
)
4087 switch (bond
->params
.xmit_policy
) {
4088 case BOND_XMIT_POLICY_LAYER23
:
4089 bond
->xmit_hash_policy
= bond_xmit_hash_policy_l23
;
4091 case BOND_XMIT_POLICY_LAYER34
:
4092 bond
->xmit_hash_policy
= bond_xmit_hash_policy_l34
;
4094 case BOND_XMIT_POLICY_LAYER2
:
4096 bond
->xmit_hash_policy
= bond_xmit_hash_policy_l2
;
4102 * Lookup the slave that corresponds to a qid
4104 static inline int bond_slave_override(struct bonding
*bond
,
4105 struct sk_buff
*skb
)
4108 struct slave
*slave
= NULL
;
4109 struct slave
*check_slave
;
4111 if (!skb
->queue_mapping
)
4114 /* Find out if any slaves have the same mapping as this skb. */
4115 bond_for_each_slave(bond
, check_slave
, i
) {
4116 if (check_slave
->queue_id
== skb
->queue_mapping
) {
4117 slave
= check_slave
;
4122 /* If the slave isn't UP, use default transmit policy. */
4123 if (slave
&& slave
->queue_id
&& IS_UP(slave
->dev
) &&
4124 (slave
->link
== BOND_LINK_UP
)) {
4125 res
= bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
4132 static u16
bond_select_queue(struct net_device
*dev
, struct sk_buff
*skb
)
4135 * This helper function exists to help dev_pick_tx get the correct
4136 * destination queue. Using a helper function skips a call to
4137 * skb_tx_hash and will put the skbs in the queue we expect on their
4138 * way down to the bonding driver.
4140 u16 txq
= skb_rx_queue_recorded(skb
) ? skb_get_rx_queue(skb
) : 0;
4143 * Save the original txq to restore before passing to the driver
4145 bond_queue_mapping(skb
) = skb
->queue_mapping
;
4147 if (unlikely(txq
>= dev
->real_num_tx_queues
)) {
4149 txq
-= dev
->real_num_tx_queues
;
4150 } while (txq
>= dev
->real_num_tx_queues
);
4155 static netdev_tx_t
__bond_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
4157 struct bonding
*bond
= netdev_priv(dev
);
4159 if (TX_QUEUE_OVERRIDE(bond
->params
.mode
)) {
4160 if (!bond_slave_override(bond
, skb
))
4161 return NETDEV_TX_OK
;
4164 switch (bond
->params
.mode
) {
4165 case BOND_MODE_ROUNDROBIN
:
4166 return bond_xmit_roundrobin(skb
, dev
);
4167 case BOND_MODE_ACTIVEBACKUP
:
4168 return bond_xmit_activebackup(skb
, dev
);
4170 return bond_xmit_xor(skb
, dev
);
4171 case BOND_MODE_BROADCAST
:
4172 return bond_xmit_broadcast(skb
, dev
);
4173 case BOND_MODE_8023AD
:
4174 return bond_3ad_xmit_xor(skb
, dev
);
4177 return bond_alb_xmit(skb
, dev
);
4179 /* Should never happen, mode already checked */
4180 pr_err("%s: Error: Unknown bonding mode %d\n",
4181 dev
->name
, bond
->params
.mode
);
4184 return NETDEV_TX_OK
;
4188 static netdev_tx_t
bond_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
4190 struct bonding
*bond
= netdev_priv(dev
);
4191 netdev_tx_t ret
= NETDEV_TX_OK
;
4194 * If we risk deadlock from transmitting this in the
4195 * netpoll path, tell netpoll to queue the frame for later tx
4197 if (is_netpoll_tx_blocked(dev
))
4198 return NETDEV_TX_BUSY
;
4200 read_lock(&bond
->lock
);
4202 if (bond
->slave_cnt
)
4203 ret
= __bond_start_xmit(skb
, dev
);
4207 read_unlock(&bond
->lock
);
4213 * set bond mode specific net device operations
4215 void bond_set_mode_ops(struct bonding
*bond
, int mode
)
4217 struct net_device
*bond_dev
= bond
->dev
;
4220 case BOND_MODE_ROUNDROBIN
:
4222 case BOND_MODE_ACTIVEBACKUP
:
4225 bond_set_xmit_hash_policy(bond
);
4227 case BOND_MODE_BROADCAST
:
4229 case BOND_MODE_8023AD
:
4230 bond_set_xmit_hash_policy(bond
);
4237 /* Should never happen, mode already checked */
4238 pr_err("%s: Error: Unknown bonding mode %d\n",
4239 bond_dev
->name
, mode
);
4244 static void bond_ethtool_get_drvinfo(struct net_device
*bond_dev
,
4245 struct ethtool_drvinfo
*drvinfo
)
4247 strncpy(drvinfo
->driver
, DRV_NAME
, 32);
4248 strncpy(drvinfo
->version
, DRV_VERSION
, 32);
4249 snprintf(drvinfo
->fw_version
, 32, "%d", BOND_ABI_VERSION
);
4252 static const struct ethtool_ops bond_ethtool_ops
= {
4253 .get_drvinfo
= bond_ethtool_get_drvinfo
,
4254 .get_link
= ethtool_op_get_link
,
4257 static const struct net_device_ops bond_netdev_ops
= {
4258 .ndo_init
= bond_init
,
4259 .ndo_uninit
= bond_uninit
,
4260 .ndo_open
= bond_open
,
4261 .ndo_stop
= bond_close
,
4262 .ndo_start_xmit
= bond_start_xmit
,
4263 .ndo_select_queue
= bond_select_queue
,
4264 .ndo_get_stats64
= bond_get_stats
,
4265 .ndo_do_ioctl
= bond_do_ioctl
,
4266 .ndo_change_rx_flags
= bond_change_rx_flags
,
4267 .ndo_set_rx_mode
= bond_set_multicast_list
,
4268 .ndo_change_mtu
= bond_change_mtu
,
4269 .ndo_set_mac_address
= bond_set_mac_address
,
4270 .ndo_neigh_setup
= bond_neigh_setup
,
4271 .ndo_vlan_rx_add_vid
= bond_vlan_rx_add_vid
,
4272 .ndo_vlan_rx_kill_vid
= bond_vlan_rx_kill_vid
,
4273 #ifdef CONFIG_NET_POLL_CONTROLLER
4274 .ndo_netpoll_setup
= bond_netpoll_setup
,
4275 .ndo_netpoll_cleanup
= bond_netpoll_cleanup
,
4276 .ndo_poll_controller
= bond_poll_controller
,
4278 .ndo_add_slave
= bond_enslave
,
4279 .ndo_del_slave
= bond_release
,
4280 .ndo_fix_features
= bond_fix_features
,
4283 static void bond_destructor(struct net_device
*bond_dev
)
4285 struct bonding
*bond
= netdev_priv(bond_dev
);
4287 destroy_workqueue(bond
->wq
);
4288 free_netdev(bond_dev
);
4291 static void bond_setup(struct net_device
*bond_dev
)
4293 struct bonding
*bond
= netdev_priv(bond_dev
);
4295 /* initialize rwlocks */
4296 rwlock_init(&bond
->lock
);
4297 rwlock_init(&bond
->curr_slave_lock
);
4299 bond
->params
= bonding_defaults
;
4301 /* Initialize pointers */
4302 bond
->dev
= bond_dev
;
4303 INIT_LIST_HEAD(&bond
->vlan_list
);
4305 /* Initialize the device entry points */
4306 ether_setup(bond_dev
);
4307 bond_dev
->netdev_ops
= &bond_netdev_ops
;
4308 bond_dev
->ethtool_ops
= &bond_ethtool_ops
;
4309 bond_set_mode_ops(bond
, bond
->params
.mode
);
4311 bond_dev
->destructor
= bond_destructor
;
4313 /* Initialize the device options */
4314 bond_dev
->tx_queue_len
= 0;
4315 bond_dev
->flags
|= IFF_MASTER
|IFF_MULTICAST
;
4316 bond_dev
->priv_flags
|= IFF_BONDING
;
4317 bond_dev
->priv_flags
&= ~(IFF_XMIT_DST_RELEASE
| IFF_TX_SKB_SHARING
);
4319 /* At first, we block adding VLANs. That's the only way to
4320 * prevent problems that occur when adding VLANs over an
4321 * empty bond. The block will be removed once non-challenged
4322 * slaves are enslaved.
4324 bond_dev
->features
|= NETIF_F_VLAN_CHALLENGED
;
4326 /* don't acquire bond device's netif_tx_lock when
4328 bond_dev
->features
|= NETIF_F_LLTX
;
4330 /* By default, we declare the bond to be fully
4331 * VLAN hardware accelerated capable. Special
4332 * care is taken in the various xmit functions
4333 * when there are slaves that are not hw accel
4337 bond_dev
->hw_features
= BOND_VLAN_FEATURES
|
4338 NETIF_F_HW_VLAN_TX
|
4339 NETIF_F_HW_VLAN_RX
|
4340 NETIF_F_HW_VLAN_FILTER
;
4342 bond_dev
->hw_features
&= ~(NETIF_F_ALL_CSUM
& ~NETIF_F_NO_CSUM
);
4343 bond_dev
->features
|= bond_dev
->hw_features
;
4346 static void bond_work_cancel_all(struct bonding
*bond
)
4348 if (bond
->params
.miimon
&& delayed_work_pending(&bond
->mii_work
))
4349 cancel_delayed_work_sync(&bond
->mii_work
);
4351 if (bond
->params
.arp_interval
&& delayed_work_pending(&bond
->arp_work
))
4352 cancel_delayed_work_sync(&bond
->arp_work
);
4354 if (bond
->params
.mode
== BOND_MODE_ALB
&&
4355 delayed_work_pending(&bond
->alb_work
))
4356 cancel_delayed_work_sync(&bond
->alb_work
);
4358 if (bond
->params
.mode
== BOND_MODE_8023AD
&&
4359 delayed_work_pending(&bond
->ad_work
))
4360 cancel_delayed_work_sync(&bond
->ad_work
);
4362 if (delayed_work_pending(&bond
->mcast_work
))
4363 cancel_delayed_work_sync(&bond
->mcast_work
);
4367 * Destroy a bonding device.
4368 * Must be under rtnl_lock when this function is called.
4370 static void bond_uninit(struct net_device
*bond_dev
)
4372 struct bonding
*bond
= netdev_priv(bond_dev
);
4373 struct vlan_entry
*vlan
, *tmp
;
4375 bond_netpoll_cleanup(bond_dev
);
4377 /* Release the bonded slaves */
4378 bond_release_all(bond_dev
);
4380 list_del(&bond
->bond_list
);
4382 bond_work_cancel_all(bond
);
4384 bond_remove_proc_entry(bond
);
4386 bond_debug_unregister(bond
);
4388 __hw_addr_flush(&bond
->mc_list
);
4390 list_for_each_entry_safe(vlan
, tmp
, &bond
->vlan_list
, vlan_list
) {
4391 list_del(&vlan
->vlan_list
);
4396 /*------------------------- Module initialization ---------------------------*/
4399 * Convert string input module parms. Accept either the
4400 * number of the mode or its string name. A bit complicated because
4401 * some mode names are substrings of other names, and calls from sysfs
4402 * may have whitespace in the name (trailing newlines, for example).
4404 int bond_parse_parm(const char *buf
, const struct bond_parm_tbl
*tbl
)
4406 int modeint
= -1, i
, rv
;
4407 char *p
, modestr
[BOND_MAX_MODENAME_LEN
+ 1] = { 0, };
4409 for (p
= (char *)buf
; *p
; p
++)
4410 if (!(isdigit(*p
) || isspace(*p
)))
4414 rv
= sscanf(buf
, "%20s", modestr
);
4416 rv
= sscanf(buf
, "%d", &modeint
);
4421 for (i
= 0; tbl
[i
].modename
; i
++) {
4422 if (modeint
== tbl
[i
].mode
)
4424 if (strcmp(modestr
, tbl
[i
].modename
) == 0)
4431 static int bond_check_params(struct bond_params
*params
)
4433 int arp_validate_value
, fail_over_mac_value
, primary_reselect_value
;
4436 * Convert string parameters.
4439 bond_mode
= bond_parse_parm(mode
, bond_mode_tbl
);
4440 if (bond_mode
== -1) {
4441 pr_err("Error: Invalid bonding mode \"%s\"\n",
4442 mode
== NULL
? "NULL" : mode
);
4447 if (xmit_hash_policy
) {
4448 if ((bond_mode
!= BOND_MODE_XOR
) &&
4449 (bond_mode
!= BOND_MODE_8023AD
)) {
4450 pr_info("xmit_hash_policy param is irrelevant in mode %s\n",
4451 bond_mode_name(bond_mode
));
4453 xmit_hashtype
= bond_parse_parm(xmit_hash_policy
,
4455 if (xmit_hashtype
== -1) {
4456 pr_err("Error: Invalid xmit_hash_policy \"%s\"\n",
4457 xmit_hash_policy
== NULL
? "NULL" :
4465 if (bond_mode
!= BOND_MODE_8023AD
) {
4466 pr_info("lacp_rate param is irrelevant in mode %s\n",
4467 bond_mode_name(bond_mode
));
4469 lacp_fast
= bond_parse_parm(lacp_rate
, bond_lacp_tbl
);
4470 if (lacp_fast
== -1) {
4471 pr_err("Error: Invalid lacp rate \"%s\"\n",
4472 lacp_rate
== NULL
? "NULL" : lacp_rate
);
4479 params
->ad_select
= bond_parse_parm(ad_select
, ad_select_tbl
);
4480 if (params
->ad_select
== -1) {
4481 pr_err("Error: Invalid ad_select \"%s\"\n",
4482 ad_select
== NULL
? "NULL" : ad_select
);
4486 if (bond_mode
!= BOND_MODE_8023AD
) {
4487 pr_warning("ad_select param only affects 802.3ad mode\n");
4490 params
->ad_select
= BOND_AD_STABLE
;
4493 if (max_bonds
< 0) {
4494 pr_warning("Warning: max_bonds (%d) not in range %d-%d, so it was reset to BOND_DEFAULT_MAX_BONDS (%d)\n",
4495 max_bonds
, 0, INT_MAX
, BOND_DEFAULT_MAX_BONDS
);
4496 max_bonds
= BOND_DEFAULT_MAX_BONDS
;
4500 pr_warning("Warning: miimon module parameter (%d), not in range 0-%d, so it was reset to %d\n",
4501 miimon
, INT_MAX
, BOND_LINK_MON_INTERV
);
4502 miimon
= BOND_LINK_MON_INTERV
;
4506 pr_warning("Warning: updelay module parameter (%d), not in range 0-%d, so it was reset to 0\n",
4511 if (downdelay
< 0) {
4512 pr_warning("Warning: downdelay module parameter (%d), not in range 0-%d, so it was reset to 0\n",
4513 downdelay
, INT_MAX
);
4517 if ((use_carrier
!= 0) && (use_carrier
!= 1)) {
4518 pr_warning("Warning: use_carrier module parameter (%d), not of valid value (0/1), so it was set to 1\n",
4523 if (num_peer_notif
< 0 || num_peer_notif
> 255) {
4524 pr_warning("Warning: num_grat_arp/num_unsol_na (%d) not in range 0-255 so it was reset to 1\n",
4529 /* reset values for 802.3ad */
4530 if (bond_mode
== BOND_MODE_8023AD
) {
4532 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");
4533 pr_warning("Forcing miimon to 100msec\n");
4538 if (tx_queues
< 1 || tx_queues
> 255) {
4539 pr_warning("Warning: tx_queues (%d) should be between "
4540 "1 and 255, resetting to %d\n",
4541 tx_queues
, BOND_DEFAULT_TX_QUEUES
);
4542 tx_queues
= BOND_DEFAULT_TX_QUEUES
;
4545 if ((all_slaves_active
!= 0) && (all_slaves_active
!= 1)) {
4546 pr_warning("Warning: all_slaves_active module parameter (%d), "
4547 "not of valid value (0/1), so it was set to "
4548 "0\n", all_slaves_active
);
4549 all_slaves_active
= 0;
4552 if (resend_igmp
< 0 || resend_igmp
> 255) {
4553 pr_warning("Warning: resend_igmp (%d) should be between "
4554 "0 and 255, resetting to %d\n",
4555 resend_igmp
, BOND_DEFAULT_RESEND_IGMP
);
4556 resend_igmp
= BOND_DEFAULT_RESEND_IGMP
;
4559 /* reset values for TLB/ALB */
4560 if ((bond_mode
== BOND_MODE_TLB
) ||
4561 (bond_mode
== BOND_MODE_ALB
)) {
4563 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");
4564 pr_warning("Forcing miimon to 100msec\n");
4569 if (bond_mode
== BOND_MODE_ALB
) {
4570 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",
4575 if (updelay
|| downdelay
) {
4576 /* just warn the user the up/down delay will have
4577 * no effect since miimon is zero...
4579 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",
4580 updelay
, downdelay
);
4583 /* don't allow arp monitoring */
4585 pr_warning("Warning: miimon (%d) and arp_interval (%d) can't be used simultaneously, disabling ARP monitoring\n",
4586 miimon
, arp_interval
);
4590 if ((updelay
% miimon
) != 0) {
4591 pr_warning("Warning: updelay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
4593 (updelay
/ miimon
) * miimon
);
4598 if ((downdelay
% miimon
) != 0) {
4599 pr_warning("Warning: downdelay (%d) is not a multiple of miimon (%d), downdelay rounded to %d ms\n",
4601 (downdelay
/ miimon
) * miimon
);
4604 downdelay
/= miimon
;
4607 if (arp_interval
< 0) {
4608 pr_warning("Warning: arp_interval module parameter (%d) , not in range 0-%d, so it was reset to %d\n",
4609 arp_interval
, INT_MAX
, BOND_LINK_ARP_INTERV
);
4610 arp_interval
= BOND_LINK_ARP_INTERV
;
4613 for (arp_ip_count
= 0;
4614 (arp_ip_count
< BOND_MAX_ARP_TARGETS
) && arp_ip_target
[arp_ip_count
];
4616 /* not complete check, but should be good enough to
4618 if (!isdigit(arp_ip_target
[arp_ip_count
][0])) {
4619 pr_warning("Warning: bad arp_ip_target module parameter (%s), ARP monitoring will not be performed\n",
4620 arp_ip_target
[arp_ip_count
]);
4623 __be32 ip
= in_aton(arp_ip_target
[arp_ip_count
]);
4624 arp_target
[arp_ip_count
] = ip
;
4628 if (arp_interval
&& !arp_ip_count
) {
4629 /* don't allow arping if no arp_ip_target given... */
4630 pr_warning("Warning: arp_interval module parameter (%d) specified without providing an arp_ip_target parameter, arp_interval was reset to 0\n",
4636 if (bond_mode
!= BOND_MODE_ACTIVEBACKUP
) {
4637 pr_err("arp_validate only supported in active-backup mode\n");
4640 if (!arp_interval
) {
4641 pr_err("arp_validate requires arp_interval\n");
4645 arp_validate_value
= bond_parse_parm(arp_validate
,
4647 if (arp_validate_value
== -1) {
4648 pr_err("Error: invalid arp_validate \"%s\"\n",
4649 arp_validate
== NULL
? "NULL" : arp_validate
);
4653 arp_validate_value
= 0;
4656 pr_info("MII link monitoring set to %d ms\n", miimon
);
4657 } else if (arp_interval
) {
4660 pr_info("ARP monitoring set to %d ms, validate %s, with %d target(s):",
4662 arp_validate_tbl
[arp_validate_value
].modename
,
4665 for (i
= 0; i
< arp_ip_count
; i
++)
4666 pr_info(" %s", arp_ip_target
[i
]);
4670 } else if (max_bonds
) {
4671 /* miimon and arp_interval not set, we need one so things
4672 * work as expected, see bonding.txt for details
4674 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");
4677 if (primary
&& !USES_PRIMARY(bond_mode
)) {
4678 /* currently, using a primary only makes sense
4679 * in active backup, TLB or ALB modes
4681 pr_warning("Warning: %s primary device specified but has no effect in %s mode\n",
4682 primary
, bond_mode_name(bond_mode
));
4686 if (primary
&& primary_reselect
) {
4687 primary_reselect_value
= bond_parse_parm(primary_reselect
,
4689 if (primary_reselect_value
== -1) {
4690 pr_err("Error: Invalid primary_reselect \"%s\"\n",
4692 NULL
? "NULL" : primary_reselect
);
4696 primary_reselect_value
= BOND_PRI_RESELECT_ALWAYS
;
4699 if (fail_over_mac
) {
4700 fail_over_mac_value
= bond_parse_parm(fail_over_mac
,
4702 if (fail_over_mac_value
== -1) {
4703 pr_err("Error: invalid fail_over_mac \"%s\"\n",
4704 arp_validate
== NULL
? "NULL" : arp_validate
);
4708 if (bond_mode
!= BOND_MODE_ACTIVEBACKUP
)
4709 pr_warning("Warning: fail_over_mac only affects active-backup mode.\n");
4711 fail_over_mac_value
= BOND_FOM_NONE
;
4714 /* fill params struct with the proper values */
4715 params
->mode
= bond_mode
;
4716 params
->xmit_policy
= xmit_hashtype
;
4717 params
->miimon
= miimon
;
4718 params
->num_peer_notif
= num_peer_notif
;
4719 params
->arp_interval
= arp_interval
;
4720 params
->arp_validate
= arp_validate_value
;
4721 params
->updelay
= updelay
;
4722 params
->downdelay
= downdelay
;
4723 params
->use_carrier
= use_carrier
;
4724 params
->lacp_fast
= lacp_fast
;
4725 params
->primary
[0] = 0;
4726 params
->primary_reselect
= primary_reselect_value
;
4727 params
->fail_over_mac
= fail_over_mac_value
;
4728 params
->tx_queues
= tx_queues
;
4729 params
->all_slaves_active
= all_slaves_active
;
4730 params
->resend_igmp
= resend_igmp
;
4731 params
->min_links
= min_links
;
4734 strncpy(params
->primary
, primary
, IFNAMSIZ
);
4735 params
->primary
[IFNAMSIZ
- 1] = 0;
4738 memcpy(params
->arp_targets
, arp_target
, sizeof(arp_target
));
4743 static struct lock_class_key bonding_netdev_xmit_lock_key
;
4744 static struct lock_class_key bonding_netdev_addr_lock_key
;
4746 static void bond_set_lockdep_class_one(struct net_device
*dev
,
4747 struct netdev_queue
*txq
,
4750 lockdep_set_class(&txq
->_xmit_lock
,
4751 &bonding_netdev_xmit_lock_key
);
4754 static void bond_set_lockdep_class(struct net_device
*dev
)
4756 lockdep_set_class(&dev
->addr_list_lock
,
4757 &bonding_netdev_addr_lock_key
);
4758 netdev_for_each_tx_queue(dev
, bond_set_lockdep_class_one
, NULL
);
4762 * Called from registration process
4764 static int bond_init(struct net_device
*bond_dev
)
4766 struct bonding
*bond
= netdev_priv(bond_dev
);
4767 struct bond_net
*bn
= net_generic(dev_net(bond_dev
), bond_net_id
);
4768 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
4770 pr_debug("Begin bond_init for %s\n", bond_dev
->name
);
4773 * Initialize locks that may be required during
4774 * en/deslave operations. All of the bond_open work
4775 * (of which this is part) should really be moved to
4776 * a phase prior to dev_open
4778 spin_lock_init(&(bond_info
->tx_hashtbl_lock
));
4779 spin_lock_init(&(bond_info
->rx_hashtbl_lock
));
4781 bond
->wq
= create_singlethread_workqueue(bond_dev
->name
);
4785 bond_set_lockdep_class(bond_dev
);
4787 bond_create_proc_entry(bond
);
4788 list_add_tail(&bond
->bond_list
, &bn
->dev_list
);
4790 bond_prepare_sysfs_group(bond
);
4792 bond_debug_register(bond
);
4794 __hw_addr_init(&bond
->mc_list
);
4798 static int bond_validate(struct nlattr
*tb
[], struct nlattr
*data
[])
4800 if (tb
[IFLA_ADDRESS
]) {
4801 if (nla_len(tb
[IFLA_ADDRESS
]) != ETH_ALEN
)
4803 if (!is_valid_ether_addr(nla_data(tb
[IFLA_ADDRESS
])))
4804 return -EADDRNOTAVAIL
;
4809 static int bond_get_tx_queues(struct net
*net
, struct nlattr
*tb
[],
4810 unsigned int *num_queues
,
4811 unsigned int *real_num_queues
)
4813 *num_queues
= tx_queues
;
4817 static struct rtnl_link_ops bond_link_ops __read_mostly
= {
4819 .priv_size
= sizeof(struct bonding
),
4820 .setup
= bond_setup
,
4821 .validate
= bond_validate
,
4822 .get_tx_queues
= bond_get_tx_queues
,
4825 /* Create a new bond based on the specified name and bonding parameters.
4826 * If name is NULL, obtain a suitable "bond%d" name for us.
4827 * Caller must NOT hold rtnl_lock; we need to release it here before we
4828 * set up our sysfs entries.
4830 int bond_create(struct net
*net
, const char *name
)
4832 struct net_device
*bond_dev
;
4837 bond_dev
= alloc_netdev_mq(sizeof(struct bonding
),
4838 name
? name
: "bond%d",
4839 bond_setup
, tx_queues
);
4841 pr_err("%s: eek! can't alloc netdev!\n", name
);
4846 dev_net_set(bond_dev
, net
);
4847 bond_dev
->rtnl_link_ops
= &bond_link_ops
;
4849 res
= register_netdevice(bond_dev
);
4851 netif_carrier_off(bond_dev
);
4855 bond_destructor(bond_dev
);
4859 static int __net_init
bond_net_init(struct net
*net
)
4861 struct bond_net
*bn
= net_generic(net
, bond_net_id
);
4864 INIT_LIST_HEAD(&bn
->dev_list
);
4866 bond_create_proc_dir(bn
);
4867 bond_create_sysfs(bn
);
4872 static void __net_exit
bond_net_exit(struct net
*net
)
4874 struct bond_net
*bn
= net_generic(net
, bond_net_id
);
4876 bond_destroy_sysfs(bn
);
4877 bond_destroy_proc_dir(bn
);
4880 static struct pernet_operations bond_net_ops
= {
4881 .init
= bond_net_init
,
4882 .exit
= bond_net_exit
,
4884 .size
= sizeof(struct bond_net
),
4887 static int __init
bonding_init(void)
4892 pr_info("%s", bond_version
);
4894 res
= bond_check_params(&bonding_defaults
);
4898 res
= register_pernet_subsys(&bond_net_ops
);
4902 res
= rtnl_link_register(&bond_link_ops
);
4906 bond_create_debugfs();
4908 for (i
= 0; i
< max_bonds
; i
++) {
4909 res
= bond_create(&init_net
, NULL
);
4914 register_netdevice_notifier(&bond_netdev_notifier
);
4915 register_inetaddr_notifier(&bond_inetaddr_notifier
);
4919 rtnl_link_unregister(&bond_link_ops
);
4921 unregister_pernet_subsys(&bond_net_ops
);
4926 static void __exit
bonding_exit(void)
4928 unregister_netdevice_notifier(&bond_netdev_notifier
);
4929 unregister_inetaddr_notifier(&bond_inetaddr_notifier
);
4931 bond_destroy_debugfs();
4933 rtnl_link_unregister(&bond_link_ops
);
4934 unregister_pernet_subsys(&bond_net_ops
);
4936 #ifdef CONFIG_NET_POLL_CONTROLLER
4938 * Make sure we don't have an imbalance on our netpoll blocking
4940 WARN_ON(atomic_read(&netpoll_block_tx
));
4944 module_init(bonding_init
);
4945 module_exit(bonding_exit
);
4946 MODULE_LICENSE("GPL");
4947 MODULE_VERSION(DRV_VERSION
);
4948 MODULE_DESCRIPTION(DRV_DESCRIPTION
", v" DRV_VERSION
);
4949 MODULE_AUTHOR("Thomas Davis, tadavis@lbl.gov and many others");
4950 MODULE_ALIAS_RTNL_LINK("bond");