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, fake speed and duplex to 100/Full
556 static int bond_update_speed_duplex(struct slave
*slave
)
558 struct net_device
*slave_dev
= slave
->dev
;
559 struct ethtool_cmd ecmd
;
563 /* Fake speed and duplex */
564 slave
->speed
= SPEED_100
;
565 slave
->duplex
= DUPLEX_FULL
;
567 res
= __ethtool_get_settings(slave_dev
, &ecmd
);
571 slave_speed
= ethtool_cmd_speed(&ecmd
);
572 if (slave_speed
== 0 || slave_speed
== ((__u32
) -1))
575 switch (ecmd
.duplex
) {
583 slave
->speed
= slave_speed
;
584 slave
->duplex
= ecmd
.duplex
;
590 * if <dev> supports MII link status reporting, check its link status.
592 * We either do MII/ETHTOOL ioctls, or check netif_carrier_ok(),
593 * depending upon the setting of the use_carrier parameter.
595 * Return either BMSR_LSTATUS, meaning that the link is up (or we
596 * can't tell and just pretend it is), or 0, meaning that the link is
599 * If reporting is non-zero, instead of faking link up, return -1 if
600 * both ETHTOOL and MII ioctls fail (meaning the device does not
601 * support them). If use_carrier is set, return whatever it says.
602 * It'd be nice if there was a good way to tell if a driver supports
603 * netif_carrier, but there really isn't.
605 static int bond_check_dev_link(struct bonding
*bond
,
606 struct net_device
*slave_dev
, int reporting
)
608 const struct net_device_ops
*slave_ops
= slave_dev
->netdev_ops
;
609 int (*ioctl
)(struct net_device
*, struct ifreq
*, int);
611 struct mii_ioctl_data
*mii
;
613 if (!reporting
&& !netif_running(slave_dev
))
616 if (bond
->params
.use_carrier
)
617 return netif_carrier_ok(slave_dev
) ? BMSR_LSTATUS
: 0;
619 /* Try to get link status using Ethtool first. */
620 if (slave_dev
->ethtool_ops
) {
621 if (slave_dev
->ethtool_ops
->get_link
) {
624 link
= slave_dev
->ethtool_ops
->get_link(slave_dev
);
626 return link
? BMSR_LSTATUS
: 0;
630 /* Ethtool can't be used, fallback to MII ioctls. */
631 ioctl
= slave_ops
->ndo_do_ioctl
;
633 /* TODO: set pointer to correct ioctl on a per team member */
634 /* bases to make this more efficient. that is, once */
635 /* we determine the correct ioctl, we will always */
636 /* call it and not the others for that team */
640 * We cannot assume that SIOCGMIIPHY will also read a
641 * register; not all network drivers (e.g., e100)
645 /* Yes, the mii is overlaid on the ifreq.ifr_ifru */
646 strncpy(ifr
.ifr_name
, slave_dev
->name
, IFNAMSIZ
);
648 if (IOCTL(slave_dev
, &ifr
, SIOCGMIIPHY
) == 0) {
649 mii
->reg_num
= MII_BMSR
;
650 if (IOCTL(slave_dev
, &ifr
, SIOCGMIIREG
) == 0)
651 return mii
->val_out
& BMSR_LSTATUS
;
656 * If reporting, report that either there's no dev->do_ioctl,
657 * or both SIOCGMIIREG and get_link failed (meaning that we
658 * cannot report link status). If not reporting, pretend
661 return reporting
? -1 : BMSR_LSTATUS
;
664 /*----------------------------- Multicast list ------------------------------*/
667 * Push the promiscuity flag down to appropriate slaves
669 static int bond_set_promiscuity(struct bonding
*bond
, int inc
)
672 if (USES_PRIMARY(bond
->params
.mode
)) {
673 /* write lock already acquired */
674 if (bond
->curr_active_slave
) {
675 err
= dev_set_promiscuity(bond
->curr_active_slave
->dev
,
681 bond_for_each_slave(bond
, slave
, i
) {
682 err
= dev_set_promiscuity(slave
->dev
, inc
);
691 * Push the allmulti flag down to all slaves
693 static int bond_set_allmulti(struct bonding
*bond
, int inc
)
696 if (USES_PRIMARY(bond
->params
.mode
)) {
697 /* write lock already acquired */
698 if (bond
->curr_active_slave
) {
699 err
= dev_set_allmulti(bond
->curr_active_slave
->dev
,
705 bond_for_each_slave(bond
, slave
, i
) {
706 err
= dev_set_allmulti(slave
->dev
, inc
);
715 * Add a Multicast address to slaves
718 static void bond_mc_add(struct bonding
*bond
, void *addr
)
720 if (USES_PRIMARY(bond
->params
.mode
)) {
721 /* write lock already acquired */
722 if (bond
->curr_active_slave
)
723 dev_mc_add(bond
->curr_active_slave
->dev
, addr
);
728 bond_for_each_slave(bond
, slave
, i
)
729 dev_mc_add(slave
->dev
, addr
);
734 * Remove a multicast address from slave
737 static void bond_mc_del(struct bonding
*bond
, void *addr
)
739 if (USES_PRIMARY(bond
->params
.mode
)) {
740 /* write lock already acquired */
741 if (bond
->curr_active_slave
)
742 dev_mc_del(bond
->curr_active_slave
->dev
, addr
);
746 bond_for_each_slave(bond
, slave
, i
) {
747 dev_mc_del(slave
->dev
, addr
);
753 static void __bond_resend_igmp_join_requests(struct net_device
*dev
)
755 struct in_device
*in_dev
;
758 in_dev
= __in_dev_get_rcu(dev
);
760 ip_mc_rejoin_groups(in_dev
);
765 * Retrieve the list of registered multicast addresses for the bonding
766 * device and retransmit an IGMP JOIN request to the current active
769 static void bond_resend_igmp_join_requests(struct bonding
*bond
)
771 struct net_device
*vlan_dev
;
772 struct vlan_entry
*vlan
;
774 read_lock(&bond
->lock
);
776 /* rejoin all groups on bond device */
777 __bond_resend_igmp_join_requests(bond
->dev
);
779 /* rejoin all groups on vlan devices */
780 list_for_each_entry(vlan
, &bond
->vlan_list
, vlan_list
) {
782 vlan_dev
= __vlan_find_dev_deep(bond
->dev
,
786 __bond_resend_igmp_join_requests(vlan_dev
);
789 if (--bond
->igmp_retrans
> 0)
790 queue_delayed_work(bond
->wq
, &bond
->mcast_work
, HZ
/5);
792 read_unlock(&bond
->lock
);
795 static void bond_resend_igmp_join_requests_delayed(struct work_struct
*work
)
797 struct bonding
*bond
= container_of(work
, struct bonding
,
799 bond_resend_igmp_join_requests(bond
);
803 * flush all members of flush->mc_list from device dev->mc_list
805 static void bond_mc_list_flush(struct net_device
*bond_dev
,
806 struct net_device
*slave_dev
)
808 struct bonding
*bond
= netdev_priv(bond_dev
);
809 struct netdev_hw_addr
*ha
;
811 netdev_for_each_mc_addr(ha
, bond_dev
)
812 dev_mc_del(slave_dev
, ha
->addr
);
814 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
815 /* del lacpdu mc addr from mc list */
816 u8 lacpdu_multicast
[ETH_ALEN
] = MULTICAST_LACPDU_ADDR
;
818 dev_mc_del(slave_dev
, lacpdu_multicast
);
822 /*--------------------------- Active slave change ---------------------------*/
825 * Update the mc list and multicast-related flags for the new and
826 * old active slaves (if any) according to the multicast mode, and
827 * promiscuous flags unconditionally.
829 static void bond_mc_swap(struct bonding
*bond
, struct slave
*new_active
,
830 struct slave
*old_active
)
832 struct netdev_hw_addr
*ha
;
834 if (!USES_PRIMARY(bond
->params
.mode
))
835 /* nothing to do - mc list is already up-to-date on
841 if (bond
->dev
->flags
& IFF_PROMISC
)
842 dev_set_promiscuity(old_active
->dev
, -1);
844 if (bond
->dev
->flags
& IFF_ALLMULTI
)
845 dev_set_allmulti(old_active
->dev
, -1);
847 netdev_for_each_mc_addr(ha
, bond
->dev
)
848 dev_mc_del(old_active
->dev
, ha
->addr
);
852 /* FIXME: Signal errors upstream. */
853 if (bond
->dev
->flags
& IFF_PROMISC
)
854 dev_set_promiscuity(new_active
->dev
, 1);
856 if (bond
->dev
->flags
& IFF_ALLMULTI
)
857 dev_set_allmulti(new_active
->dev
, 1);
859 netdev_for_each_mc_addr(ha
, bond
->dev
)
860 dev_mc_add(new_active
->dev
, ha
->addr
);
865 * bond_do_fail_over_mac
867 * Perform special MAC address swapping for fail_over_mac settings
869 * Called with RTNL, bond->lock for read, curr_slave_lock for write_bh.
871 static void bond_do_fail_over_mac(struct bonding
*bond
,
872 struct slave
*new_active
,
873 struct slave
*old_active
)
874 __releases(&bond
->curr_slave_lock
)
875 __releases(&bond
->lock
)
876 __acquires(&bond
->lock
)
877 __acquires(&bond
->curr_slave_lock
)
879 u8 tmp_mac
[ETH_ALEN
];
880 struct sockaddr saddr
;
883 switch (bond
->params
.fail_over_mac
) {
884 case BOND_FOM_ACTIVE
:
886 memcpy(bond
->dev
->dev_addr
, new_active
->dev
->dev_addr
,
887 new_active
->dev
->addr_len
);
889 case BOND_FOM_FOLLOW
:
891 * if new_active && old_active, swap them
892 * if just old_active, do nothing (going to no active slave)
893 * if just new_active, set new_active to bond's MAC
898 write_unlock_bh(&bond
->curr_slave_lock
);
899 read_unlock(&bond
->lock
);
902 memcpy(tmp_mac
, new_active
->dev
->dev_addr
, ETH_ALEN
);
903 memcpy(saddr
.sa_data
, old_active
->dev
->dev_addr
,
905 saddr
.sa_family
= new_active
->dev
->type
;
907 memcpy(saddr
.sa_data
, bond
->dev
->dev_addr
, ETH_ALEN
);
908 saddr
.sa_family
= bond
->dev
->type
;
911 rv
= dev_set_mac_address(new_active
->dev
, &saddr
);
913 pr_err("%s: Error %d setting MAC of slave %s\n",
914 bond
->dev
->name
, -rv
, new_active
->dev
->name
);
921 memcpy(saddr
.sa_data
, tmp_mac
, ETH_ALEN
);
922 saddr
.sa_family
= old_active
->dev
->type
;
924 rv
= dev_set_mac_address(old_active
->dev
, &saddr
);
926 pr_err("%s: Error %d setting MAC of slave %s\n",
927 bond
->dev
->name
, -rv
, new_active
->dev
->name
);
929 read_lock(&bond
->lock
);
930 write_lock_bh(&bond
->curr_slave_lock
);
933 pr_err("%s: bond_do_fail_over_mac impossible: bad policy %d\n",
934 bond
->dev
->name
, bond
->params
.fail_over_mac
);
940 static bool bond_should_change_active(struct bonding
*bond
)
942 struct slave
*prim
= bond
->primary_slave
;
943 struct slave
*curr
= bond
->curr_active_slave
;
945 if (!prim
|| !curr
|| curr
->link
!= BOND_LINK_UP
)
947 if (bond
->force_primary
) {
948 bond
->force_primary
= false;
951 if (bond
->params
.primary_reselect
== BOND_PRI_RESELECT_BETTER
&&
952 (prim
->speed
< curr
->speed
||
953 (prim
->speed
== curr
->speed
&& prim
->duplex
<= curr
->duplex
)))
955 if (bond
->params
.primary_reselect
== BOND_PRI_RESELECT_FAILURE
)
961 * find_best_interface - select the best available slave to be the active one
962 * @bond: our bonding struct
964 * Warning: Caller must hold curr_slave_lock for writing.
966 static struct slave
*bond_find_best_slave(struct bonding
*bond
)
968 struct slave
*new_active
, *old_active
;
969 struct slave
*bestslave
= NULL
;
970 int mintime
= bond
->params
.updelay
;
973 new_active
= bond
->curr_active_slave
;
975 if (!new_active
) { /* there were no active slaves left */
976 if (bond
->slave_cnt
> 0) /* found one slave */
977 new_active
= bond
->first_slave
;
979 return NULL
; /* still no slave, return NULL */
982 if ((bond
->primary_slave
) &&
983 bond
->primary_slave
->link
== BOND_LINK_UP
&&
984 bond_should_change_active(bond
)) {
985 new_active
= bond
->primary_slave
;
988 /* remember where to stop iterating over the slaves */
989 old_active
= new_active
;
991 bond_for_each_slave_from(bond
, new_active
, i
, old_active
) {
992 if (new_active
->link
== BOND_LINK_UP
) {
994 } else if (new_active
->link
== BOND_LINK_BACK
&&
995 IS_UP(new_active
->dev
)) {
996 /* link up, but waiting for stabilization */
997 if (new_active
->delay
< mintime
) {
998 mintime
= new_active
->delay
;
999 bestslave
= new_active
;
1007 static bool bond_should_notify_peers(struct bonding
*bond
)
1009 struct slave
*slave
= bond
->curr_active_slave
;
1011 pr_debug("bond_should_notify_peers: bond %s slave %s\n",
1012 bond
->dev
->name
, slave
? slave
->dev
->name
: "NULL");
1014 if (!slave
|| !bond
->send_peer_notif
||
1015 test_bit(__LINK_STATE_LINKWATCH_PENDING
, &slave
->dev
->state
))
1018 bond
->send_peer_notif
--;
1023 * change_active_interface - change the active slave into the specified one
1024 * @bond: our bonding struct
1025 * @new: the new slave to make the active one
1027 * Set the new slave to the bond's settings and unset them on the old
1028 * curr_active_slave.
1029 * Setting include flags, mc-list, promiscuity, allmulti, etc.
1031 * If @new's link state is %BOND_LINK_BACK we'll set it to %BOND_LINK_UP,
1032 * because it is apparently the best available slave we have, even though its
1033 * updelay hasn't timed out yet.
1035 * If new_active is not NULL, caller must hold bond->lock for read and
1036 * curr_slave_lock for write_bh.
1038 void bond_change_active_slave(struct bonding
*bond
, struct slave
*new_active
)
1040 struct slave
*old_active
= bond
->curr_active_slave
;
1042 if (old_active
== new_active
)
1046 new_active
->jiffies
= jiffies
;
1048 if (new_active
->link
== BOND_LINK_BACK
) {
1049 if (USES_PRIMARY(bond
->params
.mode
)) {
1050 pr_info("%s: making interface %s the new active one %d ms earlier.\n",
1051 bond
->dev
->name
, new_active
->dev
->name
,
1052 (bond
->params
.updelay
- new_active
->delay
) * bond
->params
.miimon
);
1055 new_active
->delay
= 0;
1056 new_active
->link
= BOND_LINK_UP
;
1058 if (bond
->params
.mode
== BOND_MODE_8023AD
)
1059 bond_3ad_handle_link_change(new_active
, BOND_LINK_UP
);
1061 if (bond_is_lb(bond
))
1062 bond_alb_handle_link_change(bond
, new_active
, BOND_LINK_UP
);
1064 if (USES_PRIMARY(bond
->params
.mode
)) {
1065 pr_info("%s: making interface %s the new active one.\n",
1066 bond
->dev
->name
, new_active
->dev
->name
);
1071 if (USES_PRIMARY(bond
->params
.mode
))
1072 bond_mc_swap(bond
, new_active
, old_active
);
1074 if (bond_is_lb(bond
)) {
1075 bond_alb_handle_active_change(bond
, new_active
);
1077 bond_set_slave_inactive_flags(old_active
);
1079 bond_set_slave_active_flags(new_active
);
1081 bond
->curr_active_slave
= new_active
;
1084 if (bond
->params
.mode
== BOND_MODE_ACTIVEBACKUP
) {
1086 bond_set_slave_inactive_flags(old_active
);
1089 bool should_notify_peers
= false;
1091 bond_set_slave_active_flags(new_active
);
1093 if (bond
->params
.fail_over_mac
)
1094 bond_do_fail_over_mac(bond
, new_active
,
1097 if (netif_running(bond
->dev
)) {
1098 bond
->send_peer_notif
=
1099 bond
->params
.num_peer_notif
;
1100 should_notify_peers
=
1101 bond_should_notify_peers(bond
);
1104 write_unlock_bh(&bond
->curr_slave_lock
);
1105 read_unlock(&bond
->lock
);
1107 netdev_bonding_change(bond
->dev
, NETDEV_BONDING_FAILOVER
);
1108 if (should_notify_peers
)
1109 netdev_bonding_change(bond
->dev
,
1110 NETDEV_NOTIFY_PEERS
);
1112 read_lock(&bond
->lock
);
1113 write_lock_bh(&bond
->curr_slave_lock
);
1117 /* resend IGMP joins since active slave has changed or
1118 * all were sent on curr_active_slave.
1119 * resend only if bond is brought up with the affected
1120 * bonding modes and the retransmission is enabled */
1121 if (netif_running(bond
->dev
) && (bond
->params
.resend_igmp
> 0) &&
1122 ((USES_PRIMARY(bond
->params
.mode
) && new_active
) ||
1123 bond
->params
.mode
== BOND_MODE_ROUNDROBIN
)) {
1124 bond
->igmp_retrans
= bond
->params
.resend_igmp
;
1125 queue_delayed_work(bond
->wq
, &bond
->mcast_work
, 0);
1130 * bond_select_active_slave - select a new active slave, if needed
1131 * @bond: our bonding struct
1133 * This functions should be called when one of the following occurs:
1134 * - The old curr_active_slave has been released or lost its link.
1135 * - The primary_slave has got its link back.
1136 * - A slave has got its link back and there's no old curr_active_slave.
1138 * Caller must hold bond->lock for read and curr_slave_lock for write_bh.
1140 void bond_select_active_slave(struct bonding
*bond
)
1142 struct slave
*best_slave
;
1145 best_slave
= bond_find_best_slave(bond
);
1146 if (best_slave
!= bond
->curr_active_slave
) {
1147 bond_change_active_slave(bond
, best_slave
);
1148 rv
= bond_set_carrier(bond
);
1152 if (netif_carrier_ok(bond
->dev
)) {
1153 pr_info("%s: first active interface up!\n",
1156 pr_info("%s: now running without any active interface !\n",
1162 /*--------------------------- slave list handling ---------------------------*/
1165 * This function attaches the slave to the end of list.
1167 * bond->lock held for writing by caller.
1169 static void bond_attach_slave(struct bonding
*bond
, struct slave
*new_slave
)
1171 if (bond
->first_slave
== NULL
) { /* attaching the first slave */
1172 new_slave
->next
= new_slave
;
1173 new_slave
->prev
= new_slave
;
1174 bond
->first_slave
= new_slave
;
1176 new_slave
->next
= bond
->first_slave
;
1177 new_slave
->prev
= bond
->first_slave
->prev
;
1178 new_slave
->next
->prev
= new_slave
;
1179 new_slave
->prev
->next
= new_slave
;
1186 * This function detaches the slave from the list.
1187 * WARNING: no check is made to verify if the slave effectively
1188 * belongs to <bond>.
1189 * Nothing is freed on return, structures are just unchained.
1190 * If any slave pointer in bond was pointing to <slave>,
1191 * it should be changed by the calling function.
1193 * bond->lock held for writing by caller.
1195 static void bond_detach_slave(struct bonding
*bond
, struct slave
*slave
)
1198 slave
->next
->prev
= slave
->prev
;
1201 slave
->prev
->next
= slave
->next
;
1203 if (bond
->first_slave
== slave
) { /* slave is the first slave */
1204 if (bond
->slave_cnt
> 1) { /* there are more slave */
1205 bond
->first_slave
= slave
->next
;
1207 bond
->first_slave
= NULL
; /* slave was the last one */
1216 #ifdef CONFIG_NET_POLL_CONTROLLER
1217 static inline int slave_enable_netpoll(struct slave
*slave
)
1222 np
= kzalloc(sizeof(*np
), GFP_KERNEL
);
1227 np
->dev
= slave
->dev
;
1228 strlcpy(np
->dev_name
, slave
->dev
->name
, IFNAMSIZ
);
1229 err
= __netpoll_setup(np
);
1238 static inline void slave_disable_netpoll(struct slave
*slave
)
1240 struct netpoll
*np
= slave
->np
;
1246 synchronize_rcu_bh();
1247 __netpoll_cleanup(np
);
1250 static inline bool slave_dev_support_netpoll(struct net_device
*slave_dev
)
1252 if (slave_dev
->priv_flags
& IFF_DISABLE_NETPOLL
)
1254 if (!slave_dev
->netdev_ops
->ndo_poll_controller
)
1259 static void bond_poll_controller(struct net_device
*bond_dev
)
1263 static void __bond_netpoll_cleanup(struct bonding
*bond
)
1265 struct slave
*slave
;
1268 bond_for_each_slave(bond
, slave
, i
)
1269 if (IS_UP(slave
->dev
))
1270 slave_disable_netpoll(slave
);
1272 static void bond_netpoll_cleanup(struct net_device
*bond_dev
)
1274 struct bonding
*bond
= netdev_priv(bond_dev
);
1276 read_lock(&bond
->lock
);
1277 __bond_netpoll_cleanup(bond
);
1278 read_unlock(&bond
->lock
);
1281 static int bond_netpoll_setup(struct net_device
*dev
, struct netpoll_info
*ni
)
1283 struct bonding
*bond
= netdev_priv(dev
);
1284 struct slave
*slave
;
1287 read_lock(&bond
->lock
);
1288 bond_for_each_slave(bond
, slave
, i
) {
1289 err
= slave_enable_netpoll(slave
);
1291 __bond_netpoll_cleanup(bond
);
1295 read_unlock(&bond
->lock
);
1299 static struct netpoll_info
*bond_netpoll_info(struct bonding
*bond
)
1301 return bond
->dev
->npinfo
;
1305 static inline int slave_enable_netpoll(struct slave
*slave
)
1309 static inline void slave_disable_netpoll(struct slave
*slave
)
1312 static void bond_netpoll_cleanup(struct net_device
*bond_dev
)
1317 /*---------------------------------- IOCTL ----------------------------------*/
1319 static int bond_sethwaddr(struct net_device
*bond_dev
,
1320 struct net_device
*slave_dev
)
1322 pr_debug("bond_dev=%p\n", bond_dev
);
1323 pr_debug("slave_dev=%p\n", slave_dev
);
1324 pr_debug("slave_dev->addr_len=%d\n", slave_dev
->addr_len
);
1325 memcpy(bond_dev
->dev_addr
, slave_dev
->dev_addr
, slave_dev
->addr_len
);
1329 static u32
bond_fix_features(struct net_device
*dev
, u32 features
)
1331 struct slave
*slave
;
1332 struct bonding
*bond
= netdev_priv(dev
);
1336 read_lock(&bond
->lock
);
1338 if (!bond
->first_slave
) {
1339 /* Disable adding VLANs to empty bond. But why? --mq */
1340 features
|= NETIF_F_VLAN_CHALLENGED
;
1345 features
&= ~NETIF_F_ONE_FOR_ALL
;
1346 features
|= NETIF_F_ALL_FOR_ALL
;
1348 bond_for_each_slave(bond
, slave
, i
) {
1349 features
= netdev_increment_features(features
,
1350 slave
->dev
->features
,
1355 read_unlock(&bond
->lock
);
1359 #define BOND_VLAN_FEATURES (NETIF_F_ALL_CSUM | NETIF_F_SG | \
1360 NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
1361 NETIF_F_HIGHDMA | NETIF_F_LRO)
1363 static void bond_compute_features(struct bonding
*bond
)
1365 struct slave
*slave
;
1366 struct net_device
*bond_dev
= bond
->dev
;
1367 u32 vlan_features
= BOND_VLAN_FEATURES
;
1368 unsigned short max_hard_header_len
= ETH_HLEN
;
1371 read_lock(&bond
->lock
);
1373 if (!bond
->first_slave
)
1376 bond_for_each_slave(bond
, slave
, i
) {
1377 vlan_features
= netdev_increment_features(vlan_features
,
1378 slave
->dev
->vlan_features
, BOND_VLAN_FEATURES
);
1380 if (slave
->dev
->hard_header_len
> max_hard_header_len
)
1381 max_hard_header_len
= slave
->dev
->hard_header_len
;
1385 bond_dev
->vlan_features
= vlan_features
;
1386 bond_dev
->hard_header_len
= max_hard_header_len
;
1388 read_unlock(&bond
->lock
);
1390 netdev_change_features(bond_dev
);
1393 static void bond_setup_by_slave(struct net_device
*bond_dev
,
1394 struct net_device
*slave_dev
)
1396 struct bonding
*bond
= netdev_priv(bond_dev
);
1398 bond_dev
->header_ops
= slave_dev
->header_ops
;
1400 bond_dev
->type
= slave_dev
->type
;
1401 bond_dev
->hard_header_len
= slave_dev
->hard_header_len
;
1402 bond_dev
->addr_len
= slave_dev
->addr_len
;
1404 memcpy(bond_dev
->broadcast
, slave_dev
->broadcast
,
1405 slave_dev
->addr_len
);
1406 bond
->setup_by_slave
= 1;
1409 /* On bonding slaves other than the currently active slave, suppress
1410 * duplicates except for alb non-mcast/bcast.
1412 static bool bond_should_deliver_exact_match(struct sk_buff
*skb
,
1413 struct slave
*slave
,
1414 struct bonding
*bond
)
1416 if (bond_is_slave_inactive(slave
)) {
1417 if (bond
->params
.mode
== BOND_MODE_ALB
&&
1418 skb
->pkt_type
!= PACKET_BROADCAST
&&
1419 skb
->pkt_type
!= PACKET_MULTICAST
)
1426 static rx_handler_result_t
bond_handle_frame(struct sk_buff
**pskb
)
1428 struct sk_buff
*skb
= *pskb
;
1429 struct slave
*slave
;
1430 struct bonding
*bond
;
1431 void (*recv_probe
)(struct sk_buff
*, struct bonding
*,
1434 skb
= skb_share_check(skb
, GFP_ATOMIC
);
1436 return RX_HANDLER_CONSUMED
;
1440 slave
= bond_slave_get_rcu(skb
->dev
);
1443 if (bond
->params
.arp_interval
)
1444 slave
->dev
->last_rx
= jiffies
;
1446 recv_probe
= ACCESS_ONCE(bond
->recv_probe
);
1448 struct sk_buff
*nskb
= skb_clone(skb
, GFP_ATOMIC
);
1451 recv_probe(nskb
, bond
, slave
);
1452 dev_kfree_skb(nskb
);
1456 if (bond_should_deliver_exact_match(skb
, slave
, bond
)) {
1457 return RX_HANDLER_EXACT
;
1460 skb
->dev
= bond
->dev
;
1462 if (bond
->params
.mode
== BOND_MODE_ALB
&&
1463 bond
->dev
->priv_flags
& IFF_BRIDGE_PORT
&&
1464 skb
->pkt_type
== PACKET_HOST
) {
1466 if (unlikely(skb_cow_head(skb
,
1467 skb
->data
- skb_mac_header(skb
)))) {
1469 return RX_HANDLER_CONSUMED
;
1471 memcpy(eth_hdr(skb
)->h_dest
, bond
->dev
->dev_addr
, ETH_ALEN
);
1474 return RX_HANDLER_ANOTHER
;
1477 /* enslave device <slave> to bond device <master> */
1478 int bond_enslave(struct net_device
*bond_dev
, struct net_device
*slave_dev
)
1480 struct bonding
*bond
= netdev_priv(bond_dev
);
1481 const struct net_device_ops
*slave_ops
= slave_dev
->netdev_ops
;
1482 struct slave
*new_slave
= NULL
;
1483 struct netdev_hw_addr
*ha
;
1484 struct sockaddr addr
;
1488 if (!bond
->params
.use_carrier
&& slave_dev
->ethtool_ops
== NULL
&&
1489 slave_ops
->ndo_do_ioctl
== NULL
) {
1490 pr_warning("%s: Warning: no link monitoring support for %s\n",
1491 bond_dev
->name
, slave_dev
->name
);
1494 /* already enslaved */
1495 if (slave_dev
->flags
& IFF_SLAVE
) {
1496 pr_debug("Error, Device was already enslaved\n");
1500 /* vlan challenged mutual exclusion */
1501 /* no need to lock since we're protected by rtnl_lock */
1502 if (slave_dev
->features
& NETIF_F_VLAN_CHALLENGED
) {
1503 pr_debug("%s: NETIF_F_VLAN_CHALLENGED\n", slave_dev
->name
);
1504 if (bond_vlan_used(bond
)) {
1505 pr_err("%s: Error: cannot enslave VLAN challenged slave %s on VLAN enabled bond %s\n",
1506 bond_dev
->name
, slave_dev
->name
, bond_dev
->name
);
1509 pr_warning("%s: Warning: enslaved VLAN challenged slave %s. Adding VLANs will be blocked as long as %s is part of bond %s\n",
1510 bond_dev
->name
, slave_dev
->name
,
1511 slave_dev
->name
, bond_dev
->name
);
1514 pr_debug("%s: ! NETIF_F_VLAN_CHALLENGED\n", slave_dev
->name
);
1518 * Old ifenslave binaries are no longer supported. These can
1519 * be identified with moderate accuracy by the state of the slave:
1520 * the current ifenslave will set the interface down prior to
1521 * enslaving it; the old ifenslave will not.
1523 if ((slave_dev
->flags
& IFF_UP
)) {
1524 pr_err("%s is up. This may be due to an out of date ifenslave.\n",
1527 goto err_undo_flags
;
1530 /* set bonding device ether type by slave - bonding netdevices are
1531 * created with ether_setup, so when the slave type is not ARPHRD_ETHER
1532 * there is a need to override some of the type dependent attribs/funcs.
1534 * bond ether type mutual exclusion - don't allow slaves of dissimilar
1535 * ether type (eg ARPHRD_ETHER and ARPHRD_INFINIBAND) share the same bond
1537 if (bond
->slave_cnt
== 0) {
1538 if (bond_dev
->type
!= slave_dev
->type
) {
1539 pr_debug("%s: change device type from %d to %d\n",
1541 bond_dev
->type
, slave_dev
->type
);
1543 res
= netdev_bonding_change(bond_dev
,
1544 NETDEV_PRE_TYPE_CHANGE
);
1545 res
= notifier_to_errno(res
);
1547 pr_err("%s: refused to change device type\n",
1550 goto err_undo_flags
;
1553 /* Flush unicast and multicast addresses */
1554 dev_uc_flush(bond_dev
);
1555 dev_mc_flush(bond_dev
);
1557 if (slave_dev
->type
!= ARPHRD_ETHER
)
1558 bond_setup_by_slave(bond_dev
, slave_dev
);
1560 ether_setup(bond_dev
);
1561 bond_dev
->priv_flags
&= ~IFF_TX_SKB_SHARING
;
1564 netdev_bonding_change(bond_dev
,
1565 NETDEV_POST_TYPE_CHANGE
);
1567 } else if (bond_dev
->type
!= slave_dev
->type
) {
1568 pr_err("%s ether type (%d) is different from other slaves (%d), can not enslave it.\n",
1570 slave_dev
->type
, bond_dev
->type
);
1572 goto err_undo_flags
;
1575 if (slave_ops
->ndo_set_mac_address
== NULL
) {
1576 if (bond
->slave_cnt
== 0) {
1577 pr_warning("%s: Warning: The first slave device specified does not support setting the MAC address. Setting fail_over_mac to active.",
1579 bond
->params
.fail_over_mac
= BOND_FOM_ACTIVE
;
1580 } else if (bond
->params
.fail_over_mac
!= BOND_FOM_ACTIVE
) {
1581 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",
1584 goto err_undo_flags
;
1588 call_netdevice_notifiers(NETDEV_JOIN
, slave_dev
);
1590 /* If this is the first slave, then we need to set the master's hardware
1591 * address to be the same as the slave's. */
1592 if (is_zero_ether_addr(bond
->dev
->dev_addr
))
1593 memcpy(bond
->dev
->dev_addr
, slave_dev
->dev_addr
,
1594 slave_dev
->addr_len
);
1597 new_slave
= kzalloc(sizeof(struct slave
), GFP_KERNEL
);
1600 goto err_undo_flags
;
1604 * Set the new_slave's queue_id to be zero. Queue ID mapping
1605 * is set via sysfs or module option if desired.
1607 new_slave
->queue_id
= 0;
1609 /* Save slave's original mtu and then set it to match the bond */
1610 new_slave
->original_mtu
= slave_dev
->mtu
;
1611 res
= dev_set_mtu(slave_dev
, bond
->dev
->mtu
);
1613 pr_debug("Error %d calling dev_set_mtu\n", res
);
1618 * Save slave's original ("permanent") mac address for modes
1619 * that need it, and for restoring it upon release, and then
1620 * set it to the master's address
1622 memcpy(new_slave
->perm_hwaddr
, slave_dev
->dev_addr
, ETH_ALEN
);
1624 if (!bond
->params
.fail_over_mac
) {
1626 * Set slave to master's mac address. The application already
1627 * set the master's mac address to that of the first slave
1629 memcpy(addr
.sa_data
, bond_dev
->dev_addr
, bond_dev
->addr_len
);
1630 addr
.sa_family
= slave_dev
->type
;
1631 res
= dev_set_mac_address(slave_dev
, &addr
);
1633 pr_debug("Error %d calling set_mac_address\n", res
);
1634 goto err_restore_mtu
;
1638 res
= netdev_set_bond_master(slave_dev
, bond_dev
);
1640 pr_debug("Error %d calling netdev_set_bond_master\n", res
);
1641 goto err_restore_mac
;
1644 /* open the slave since the application closed it */
1645 res
= dev_open(slave_dev
);
1647 pr_debug("Opening slave %s failed\n", slave_dev
->name
);
1648 goto err_unset_master
;
1651 new_slave
->bond
= bond
;
1652 new_slave
->dev
= slave_dev
;
1653 slave_dev
->priv_flags
|= IFF_BONDING
;
1655 if (bond_is_lb(bond
)) {
1656 /* bond_alb_init_slave() must be called before all other stages since
1657 * it might fail and we do not want to have to undo everything
1659 res
= bond_alb_init_slave(bond
, new_slave
);
1664 /* If the mode USES_PRIMARY, then the new slave gets the
1665 * master's promisc (and mc) settings only if it becomes the
1666 * curr_active_slave, and that is taken care of later when calling
1667 * bond_change_active()
1669 if (!USES_PRIMARY(bond
->params
.mode
)) {
1670 /* set promiscuity level to new slave */
1671 if (bond_dev
->flags
& IFF_PROMISC
) {
1672 res
= dev_set_promiscuity(slave_dev
, 1);
1677 /* set allmulti level to new slave */
1678 if (bond_dev
->flags
& IFF_ALLMULTI
) {
1679 res
= dev_set_allmulti(slave_dev
, 1);
1684 netif_addr_lock_bh(bond_dev
);
1685 /* upload master's mc_list to new slave */
1686 netdev_for_each_mc_addr(ha
, bond_dev
)
1687 dev_mc_add(slave_dev
, ha
->addr
);
1688 netif_addr_unlock_bh(bond_dev
);
1691 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
1692 /* add lacpdu mc addr to mc list */
1693 u8 lacpdu_multicast
[ETH_ALEN
] = MULTICAST_LACPDU_ADDR
;
1695 dev_mc_add(slave_dev
, lacpdu_multicast
);
1698 bond_add_vlans_on_slave(bond
, slave_dev
);
1700 write_lock_bh(&bond
->lock
);
1702 bond_attach_slave(bond
, new_slave
);
1704 new_slave
->delay
= 0;
1705 new_slave
->link_failure_count
= 0;
1707 write_unlock_bh(&bond
->lock
);
1709 bond_compute_features(bond
);
1711 read_lock(&bond
->lock
);
1713 new_slave
->last_arp_rx
= jiffies
;
1715 if (bond
->params
.miimon
&& !bond
->params
.use_carrier
) {
1716 link_reporting
= bond_check_dev_link(bond
, slave_dev
, 1);
1718 if ((link_reporting
== -1) && !bond
->params
.arp_interval
) {
1720 * miimon is set but a bonded network driver
1721 * does not support ETHTOOL/MII and
1722 * arp_interval is not set. Note: if
1723 * use_carrier is enabled, we will never go
1724 * here (because netif_carrier is always
1725 * supported); thus, we don't need to change
1726 * the messages for netif_carrier.
1728 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",
1729 bond_dev
->name
, slave_dev
->name
);
1730 } else if (link_reporting
== -1) {
1731 /* unable get link status using mii/ethtool */
1732 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",
1733 bond_dev
->name
, slave_dev
->name
);
1737 /* check for initial state */
1738 if (!bond
->params
.miimon
||
1739 (bond_check_dev_link(bond
, slave_dev
, 0) == BMSR_LSTATUS
)) {
1740 if (bond
->params
.updelay
) {
1741 pr_debug("Initial state of slave_dev is BOND_LINK_BACK\n");
1742 new_slave
->link
= BOND_LINK_BACK
;
1743 new_slave
->delay
= bond
->params
.updelay
;
1745 pr_debug("Initial state of slave_dev is BOND_LINK_UP\n");
1746 new_slave
->link
= BOND_LINK_UP
;
1748 new_slave
->jiffies
= jiffies
;
1750 pr_debug("Initial state of slave_dev is BOND_LINK_DOWN\n");
1751 new_slave
->link
= BOND_LINK_DOWN
;
1754 if (bond_update_speed_duplex(new_slave
) &&
1755 (new_slave
->link
!= BOND_LINK_DOWN
)) {
1756 pr_warning("%s: Warning: failed to get speed and duplex from %s, assumed to be 100Mb/sec and Full.\n",
1757 bond_dev
->name
, new_slave
->dev
->name
);
1759 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
1760 pr_warning("%s: Warning: Operation of 802.3ad mode requires ETHTOOL support in base driver for proper aggregator selection.\n",
1765 if (USES_PRIMARY(bond
->params
.mode
) && bond
->params
.primary
[0]) {
1766 /* if there is a primary slave, remember it */
1767 if (strcmp(bond
->params
.primary
, new_slave
->dev
->name
) == 0) {
1768 bond
->primary_slave
= new_slave
;
1769 bond
->force_primary
= true;
1773 write_lock_bh(&bond
->curr_slave_lock
);
1775 switch (bond
->params
.mode
) {
1776 case BOND_MODE_ACTIVEBACKUP
:
1777 bond_set_slave_inactive_flags(new_slave
);
1778 bond_select_active_slave(bond
);
1780 case BOND_MODE_8023AD
:
1781 /* in 802.3ad mode, the internal mechanism
1782 * will activate the slaves in the selected
1785 bond_set_slave_inactive_flags(new_slave
);
1786 /* if this is the first slave */
1787 if (bond
->slave_cnt
== 1) {
1788 SLAVE_AD_INFO(new_slave
).id
= 1;
1789 /* Initialize AD with the number of times that the AD timer is called in 1 second
1790 * can be called only after the mac address of the bond is set
1792 bond_3ad_initialize(bond
, 1000/AD_TIMER_INTERVAL
);
1794 SLAVE_AD_INFO(new_slave
).id
=
1795 SLAVE_AD_INFO(new_slave
->prev
).id
+ 1;
1798 bond_3ad_bind_slave(new_slave
);
1802 bond_set_active_slave(new_slave
);
1803 bond_set_slave_inactive_flags(new_slave
);
1804 bond_select_active_slave(bond
);
1807 pr_debug("This slave is always active in trunk mode\n");
1809 /* always active in trunk mode */
1810 bond_set_active_slave(new_slave
);
1812 /* In trunking mode there is little meaning to curr_active_slave
1813 * anyway (it holds no special properties of the bond device),
1814 * so we can change it without calling change_active_interface()
1816 if (!bond
->curr_active_slave
)
1817 bond
->curr_active_slave
= new_slave
;
1820 } /* switch(bond_mode) */
1822 write_unlock_bh(&bond
->curr_slave_lock
);
1824 bond_set_carrier(bond
);
1826 #ifdef CONFIG_NET_POLL_CONTROLLER
1827 slave_dev
->npinfo
= bond_netpoll_info(bond
);
1828 if (slave_dev
->npinfo
) {
1829 if (slave_enable_netpoll(new_slave
)) {
1830 read_unlock(&bond
->lock
);
1831 pr_info("Error, %s: master_dev is using netpoll, "
1832 "but new slave device does not support netpoll.\n",
1840 read_unlock(&bond
->lock
);
1842 res
= bond_create_slave_symlinks(bond_dev
, slave_dev
);
1846 res
= netdev_rx_handler_register(slave_dev
, bond_handle_frame
,
1849 pr_debug("Error %d calling netdev_rx_handler_register\n", res
);
1850 goto err_dest_symlinks
;
1853 pr_info("%s: enslaving %s as a%s interface with a%s link.\n",
1854 bond_dev
->name
, slave_dev
->name
,
1855 bond_is_active_slave(new_slave
) ? "n active" : " backup",
1856 new_slave
->link
!= BOND_LINK_DOWN
? "n up" : " down");
1858 /* enslave is successful */
1861 /* Undo stages on error */
1863 bond_destroy_slave_symlinks(bond_dev
, slave_dev
);
1866 dev_close(slave_dev
);
1869 netdev_set_bond_master(slave_dev
, NULL
);
1872 if (!bond
->params
.fail_over_mac
) {
1873 /* XXX TODO - fom follow mode needs to change master's
1874 * MAC if this slave's MAC is in use by the bond, or at
1875 * least print a warning.
1877 memcpy(addr
.sa_data
, new_slave
->perm_hwaddr
, ETH_ALEN
);
1878 addr
.sa_family
= slave_dev
->type
;
1879 dev_set_mac_address(slave_dev
, &addr
);
1883 dev_set_mtu(slave_dev
, new_slave
->original_mtu
);
1889 bond_compute_features(bond
);
1895 * Try to release the slave device <slave> from the bond device <master>
1896 * It is legal to access curr_active_slave without a lock because all the function
1899 * The rules for slave state should be:
1900 * for Active/Backup:
1901 * Active stays on all backups go down
1902 * for Bonded connections:
1903 * The first up interface should be left on and all others downed.
1905 int bond_release(struct net_device
*bond_dev
, struct net_device
*slave_dev
)
1907 struct bonding
*bond
= netdev_priv(bond_dev
);
1908 struct slave
*slave
, *oldcurrent
;
1909 struct sockaddr addr
;
1910 u32 old_features
= bond_dev
->features
;
1912 /* slave is not a slave or master is not master of this slave */
1913 if (!(slave_dev
->flags
& IFF_SLAVE
) ||
1914 (slave_dev
->master
!= bond_dev
)) {
1915 pr_err("%s: Error: cannot release %s.\n",
1916 bond_dev
->name
, slave_dev
->name
);
1921 netdev_bonding_change(bond_dev
, NETDEV_RELEASE
);
1922 write_lock_bh(&bond
->lock
);
1924 slave
= bond_get_slave_by_dev(bond
, slave_dev
);
1926 /* not a slave of this bond */
1927 pr_info("%s: %s not enslaved\n",
1928 bond_dev
->name
, slave_dev
->name
);
1929 write_unlock_bh(&bond
->lock
);
1930 unblock_netpoll_tx();
1934 /* unregister rx_handler early so bond_handle_frame wouldn't be called
1935 * for this slave anymore.
1937 netdev_rx_handler_unregister(slave_dev
);
1938 write_unlock_bh(&bond
->lock
);
1940 write_lock_bh(&bond
->lock
);
1942 if (!bond
->params
.fail_over_mac
) {
1943 if (!compare_ether_addr(bond_dev
->dev_addr
, slave
->perm_hwaddr
) &&
1944 bond
->slave_cnt
> 1)
1945 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",
1946 bond_dev
->name
, slave_dev
->name
,
1948 bond_dev
->name
, slave_dev
->name
);
1951 /* Inform AD package of unbinding of slave. */
1952 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
1953 /* must be called before the slave is
1954 * detached from the list
1956 bond_3ad_unbind_slave(slave
);
1959 pr_info("%s: releasing %s interface %s\n",
1961 bond_is_active_slave(slave
) ? "active" : "backup",
1964 oldcurrent
= bond
->curr_active_slave
;
1966 bond
->current_arp_slave
= NULL
;
1968 /* release the slave from its bond */
1969 bond_detach_slave(bond
, slave
);
1971 if (bond
->primary_slave
== slave
)
1972 bond
->primary_slave
= NULL
;
1974 if (oldcurrent
== slave
)
1975 bond_change_active_slave(bond
, NULL
);
1977 if (bond_is_lb(bond
)) {
1978 /* Must be called only after the slave has been
1979 * detached from the list and the curr_active_slave
1980 * has been cleared (if our_slave == old_current),
1981 * but before a new active slave is selected.
1983 write_unlock_bh(&bond
->lock
);
1984 bond_alb_deinit_slave(bond
, slave
);
1985 write_lock_bh(&bond
->lock
);
1988 if (oldcurrent
== slave
) {
1990 * Note that we hold RTNL over this sequence, so there
1991 * is no concern that another slave add/remove event
1994 write_unlock_bh(&bond
->lock
);
1995 read_lock(&bond
->lock
);
1996 write_lock_bh(&bond
->curr_slave_lock
);
1998 bond_select_active_slave(bond
);
2000 write_unlock_bh(&bond
->curr_slave_lock
);
2001 read_unlock(&bond
->lock
);
2002 write_lock_bh(&bond
->lock
);
2005 if (bond
->slave_cnt
== 0) {
2006 bond_set_carrier(bond
);
2008 /* if the last slave was removed, zero the mac address
2009 * of the master so it will be set by the application
2010 * to the mac address of the first slave
2012 memset(bond_dev
->dev_addr
, 0, bond_dev
->addr_len
);
2014 if (bond_vlan_used(bond
)) {
2015 pr_warning("%s: Warning: clearing HW address of %s while it still has VLANs.\n",
2016 bond_dev
->name
, bond_dev
->name
);
2017 pr_warning("%s: When re-adding slaves, make sure the bond's HW address matches its VLANs'.\n",
2022 write_unlock_bh(&bond
->lock
);
2023 unblock_netpoll_tx();
2025 bond_compute_features(bond
);
2026 if (!(bond_dev
->features
& NETIF_F_VLAN_CHALLENGED
) &&
2027 (old_features
& NETIF_F_VLAN_CHALLENGED
))
2028 pr_info("%s: last VLAN challenged slave %s left bond %s. VLAN blocking is removed\n",
2029 bond_dev
->name
, slave_dev
->name
, bond_dev
->name
);
2031 /* must do this from outside any spinlocks */
2032 bond_destroy_slave_symlinks(bond_dev
, slave_dev
);
2034 bond_del_vlans_from_slave(bond
, slave_dev
);
2036 /* If the mode USES_PRIMARY, then we should only remove its
2037 * promisc and mc settings if it was the curr_active_slave, but that was
2038 * already taken care of above when we detached the slave
2040 if (!USES_PRIMARY(bond
->params
.mode
)) {
2041 /* unset promiscuity level from slave */
2042 if (bond_dev
->flags
& IFF_PROMISC
)
2043 dev_set_promiscuity(slave_dev
, -1);
2045 /* unset allmulti level from slave */
2046 if (bond_dev
->flags
& IFF_ALLMULTI
)
2047 dev_set_allmulti(slave_dev
, -1);
2049 /* flush master's mc_list from slave */
2050 netif_addr_lock_bh(bond_dev
);
2051 bond_mc_list_flush(bond_dev
, slave_dev
);
2052 netif_addr_unlock_bh(bond_dev
);
2055 netdev_set_bond_master(slave_dev
, NULL
);
2057 slave_disable_netpoll(slave
);
2059 /* close slave before restoring its mac address */
2060 dev_close(slave_dev
);
2062 if (bond
->params
.fail_over_mac
!= BOND_FOM_ACTIVE
) {
2063 /* restore original ("permanent") mac address */
2064 memcpy(addr
.sa_data
, slave
->perm_hwaddr
, ETH_ALEN
);
2065 addr
.sa_family
= slave_dev
->type
;
2066 dev_set_mac_address(slave_dev
, &addr
);
2069 dev_set_mtu(slave_dev
, slave
->original_mtu
);
2071 slave_dev
->priv_flags
&= ~IFF_BONDING
;
2075 return 0; /* deletion OK */
2079 * First release a slave and then destroy the bond if no more slaves are left.
2080 * Must be under rtnl_lock when this function is called.
2082 static int bond_release_and_destroy(struct net_device
*bond_dev
,
2083 struct net_device
*slave_dev
)
2085 struct bonding
*bond
= netdev_priv(bond_dev
);
2088 ret
= bond_release(bond_dev
, slave_dev
);
2089 if ((ret
== 0) && (bond
->slave_cnt
== 0)) {
2090 bond_dev
->priv_flags
|= IFF_DISABLE_NETPOLL
;
2091 pr_info("%s: destroying bond %s.\n",
2092 bond_dev
->name
, bond_dev
->name
);
2093 unregister_netdevice(bond_dev
);
2099 * This function releases all slaves.
2101 static int bond_release_all(struct net_device
*bond_dev
)
2103 struct bonding
*bond
= netdev_priv(bond_dev
);
2104 struct slave
*slave
;
2105 struct net_device
*slave_dev
;
2106 struct sockaddr addr
;
2108 write_lock_bh(&bond
->lock
);
2110 netif_carrier_off(bond_dev
);
2112 if (bond
->slave_cnt
== 0)
2115 bond
->current_arp_slave
= NULL
;
2116 bond
->primary_slave
= NULL
;
2117 bond_change_active_slave(bond
, NULL
);
2119 while ((slave
= bond
->first_slave
) != NULL
) {
2120 /* Inform AD package of unbinding of slave
2121 * before slave is detached from the list.
2123 if (bond
->params
.mode
== BOND_MODE_8023AD
)
2124 bond_3ad_unbind_slave(slave
);
2126 slave_dev
= slave
->dev
;
2127 bond_detach_slave(bond
, slave
);
2129 /* now that the slave is detached, unlock and perform
2130 * all the undo steps that should not be called from
2133 write_unlock_bh(&bond
->lock
);
2135 /* unregister rx_handler early so bond_handle_frame wouldn't
2136 * be called for this slave anymore.
2138 netdev_rx_handler_unregister(slave_dev
);
2141 if (bond_is_lb(bond
)) {
2142 /* must be called only after the slave
2143 * has been detached from the list
2145 bond_alb_deinit_slave(bond
, slave
);
2148 bond_destroy_slave_symlinks(bond_dev
, slave_dev
);
2149 bond_del_vlans_from_slave(bond
, slave_dev
);
2151 /* If the mode USES_PRIMARY, then we should only remove its
2152 * promisc and mc settings if it was the curr_active_slave, but that was
2153 * already taken care of above when we detached the slave
2155 if (!USES_PRIMARY(bond
->params
.mode
)) {
2156 /* unset promiscuity level from slave */
2157 if (bond_dev
->flags
& IFF_PROMISC
)
2158 dev_set_promiscuity(slave_dev
, -1);
2160 /* unset allmulti level from slave */
2161 if (bond_dev
->flags
& IFF_ALLMULTI
)
2162 dev_set_allmulti(slave_dev
, -1);
2164 /* flush master's mc_list from slave */
2165 netif_addr_lock_bh(bond_dev
);
2166 bond_mc_list_flush(bond_dev
, slave_dev
);
2167 netif_addr_unlock_bh(bond_dev
);
2170 netdev_set_bond_master(slave_dev
, NULL
);
2172 slave_disable_netpoll(slave
);
2174 /* close slave before restoring its mac address */
2175 dev_close(slave_dev
);
2177 if (!bond
->params
.fail_over_mac
) {
2178 /* restore original ("permanent") mac address*/
2179 memcpy(addr
.sa_data
, slave
->perm_hwaddr
, ETH_ALEN
);
2180 addr
.sa_family
= slave_dev
->type
;
2181 dev_set_mac_address(slave_dev
, &addr
);
2186 /* re-acquire the lock before getting the next slave */
2187 write_lock_bh(&bond
->lock
);
2190 /* zero the mac address of the master so it will be
2191 * set by the application to the mac address of the
2194 memset(bond_dev
->dev_addr
, 0, bond_dev
->addr_len
);
2196 if (bond_vlan_used(bond
)) {
2197 pr_warning("%s: Warning: clearing HW address of %s while it still has VLANs.\n",
2198 bond_dev
->name
, bond_dev
->name
);
2199 pr_warning("%s: When re-adding slaves, make sure the bond's HW address matches its VLANs'.\n",
2203 pr_info("%s: released all slaves\n", bond_dev
->name
);
2206 write_unlock_bh(&bond
->lock
);
2208 bond_compute_features(bond
);
2214 * This function changes the active slave to slave <slave_dev>.
2215 * It returns -EINVAL in the following cases.
2216 * - <slave_dev> is not found in the list.
2217 * - There is not active slave now.
2218 * - <slave_dev> is already active.
2219 * - The link state of <slave_dev> is not BOND_LINK_UP.
2220 * - <slave_dev> is not running.
2221 * In these cases, this function does nothing.
2222 * In the other cases, current_slave pointer is changed and 0 is returned.
2224 static int bond_ioctl_change_active(struct net_device
*bond_dev
, struct net_device
*slave_dev
)
2226 struct bonding
*bond
= netdev_priv(bond_dev
);
2227 struct slave
*old_active
= NULL
;
2228 struct slave
*new_active
= NULL
;
2231 if (!USES_PRIMARY(bond
->params
.mode
))
2234 /* Verify that master_dev is indeed the master of slave_dev */
2235 if (!(slave_dev
->flags
& IFF_SLAVE
) || (slave_dev
->master
!= bond_dev
))
2238 read_lock(&bond
->lock
);
2240 read_lock(&bond
->curr_slave_lock
);
2241 old_active
= bond
->curr_active_slave
;
2242 read_unlock(&bond
->curr_slave_lock
);
2244 new_active
= bond_get_slave_by_dev(bond
, slave_dev
);
2247 * Changing to the current active: do nothing; return success.
2249 if (new_active
&& (new_active
== old_active
)) {
2250 read_unlock(&bond
->lock
);
2256 (new_active
->link
== BOND_LINK_UP
) &&
2257 IS_UP(new_active
->dev
)) {
2259 write_lock_bh(&bond
->curr_slave_lock
);
2260 bond_change_active_slave(bond
, new_active
);
2261 write_unlock_bh(&bond
->curr_slave_lock
);
2262 unblock_netpoll_tx();
2266 read_unlock(&bond
->lock
);
2271 static int bond_info_query(struct net_device
*bond_dev
, struct ifbond
*info
)
2273 struct bonding
*bond
= netdev_priv(bond_dev
);
2275 info
->bond_mode
= bond
->params
.mode
;
2276 info
->miimon
= bond
->params
.miimon
;
2278 read_lock(&bond
->lock
);
2279 info
->num_slaves
= bond
->slave_cnt
;
2280 read_unlock(&bond
->lock
);
2285 static int bond_slave_info_query(struct net_device
*bond_dev
, struct ifslave
*info
)
2287 struct bonding
*bond
= netdev_priv(bond_dev
);
2288 struct slave
*slave
;
2289 int i
, res
= -ENODEV
;
2291 read_lock(&bond
->lock
);
2293 bond_for_each_slave(bond
, slave
, i
) {
2294 if (i
== (int)info
->slave_id
) {
2296 strcpy(info
->slave_name
, slave
->dev
->name
);
2297 info
->link
= slave
->link
;
2298 info
->state
= bond_slave_state(slave
);
2299 info
->link_failure_count
= slave
->link_failure_count
;
2304 read_unlock(&bond
->lock
);
2309 /*-------------------------------- Monitoring -------------------------------*/
2312 static int bond_miimon_inspect(struct bonding
*bond
)
2314 struct slave
*slave
;
2315 int i
, link_state
, commit
= 0;
2316 bool ignore_updelay
;
2318 ignore_updelay
= !bond
->curr_active_slave
? true : false;
2320 bond_for_each_slave(bond
, slave
, i
) {
2321 slave
->new_link
= BOND_LINK_NOCHANGE
;
2323 link_state
= bond_check_dev_link(bond
, slave
->dev
, 0);
2325 switch (slave
->link
) {
2330 slave
->link
= BOND_LINK_FAIL
;
2331 slave
->delay
= bond
->params
.downdelay
;
2333 pr_info("%s: link status down for %sinterface %s, disabling it in %d ms.\n",
2335 (bond
->params
.mode
==
2336 BOND_MODE_ACTIVEBACKUP
) ?
2337 (bond_is_active_slave(slave
) ?
2338 "active " : "backup ") : "",
2340 bond
->params
.downdelay
* bond
->params
.miimon
);
2343 case BOND_LINK_FAIL
:
2346 * recovered before downdelay expired
2348 slave
->link
= BOND_LINK_UP
;
2349 slave
->jiffies
= jiffies
;
2350 pr_info("%s: link status up again after %d ms for interface %s.\n",
2352 (bond
->params
.downdelay
- slave
->delay
) *
2353 bond
->params
.miimon
,
2358 if (slave
->delay
<= 0) {
2359 slave
->new_link
= BOND_LINK_DOWN
;
2367 case BOND_LINK_DOWN
:
2371 slave
->link
= BOND_LINK_BACK
;
2372 slave
->delay
= bond
->params
.updelay
;
2375 pr_info("%s: link status up for interface %s, enabling it in %d ms.\n",
2376 bond
->dev
->name
, slave
->dev
->name
,
2377 ignore_updelay
? 0 :
2378 bond
->params
.updelay
*
2379 bond
->params
.miimon
);
2382 case BOND_LINK_BACK
:
2384 slave
->link
= BOND_LINK_DOWN
;
2385 pr_info("%s: link status down again after %d ms for interface %s.\n",
2387 (bond
->params
.updelay
- slave
->delay
) *
2388 bond
->params
.miimon
,
2397 if (slave
->delay
<= 0) {
2398 slave
->new_link
= BOND_LINK_UP
;
2400 ignore_updelay
= false;
2412 static void bond_miimon_commit(struct bonding
*bond
)
2414 struct slave
*slave
;
2417 bond_for_each_slave(bond
, slave
, i
) {
2418 switch (slave
->new_link
) {
2419 case BOND_LINK_NOCHANGE
:
2423 slave
->link
= BOND_LINK_UP
;
2424 slave
->jiffies
= jiffies
;
2426 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
2427 /* prevent it from being the active one */
2428 bond_set_backup_slave(slave
);
2429 } else if (bond
->params
.mode
!= BOND_MODE_ACTIVEBACKUP
) {
2430 /* make it immediately active */
2431 bond_set_active_slave(slave
);
2432 } else if (slave
!= bond
->primary_slave
) {
2433 /* prevent it from being the active one */
2434 bond_set_backup_slave(slave
);
2437 bond_update_speed_duplex(slave
);
2439 pr_info("%s: link status definitely up for interface %s, %u Mbps %s duplex.\n",
2440 bond
->dev
->name
, slave
->dev
->name
,
2441 slave
->speed
, slave
->duplex
? "full" : "half");
2443 /* notify ad that the link status has changed */
2444 if (bond
->params
.mode
== BOND_MODE_8023AD
)
2445 bond_3ad_handle_link_change(slave
, BOND_LINK_UP
);
2447 if (bond_is_lb(bond
))
2448 bond_alb_handle_link_change(bond
, slave
,
2451 if (!bond
->curr_active_slave
||
2452 (slave
== bond
->primary_slave
))
2457 case BOND_LINK_DOWN
:
2458 if (slave
->link_failure_count
< UINT_MAX
)
2459 slave
->link_failure_count
++;
2461 slave
->link
= BOND_LINK_DOWN
;
2463 if (bond
->params
.mode
== BOND_MODE_ACTIVEBACKUP
||
2464 bond
->params
.mode
== BOND_MODE_8023AD
)
2465 bond_set_slave_inactive_flags(slave
);
2467 pr_info("%s: link status definitely down for interface %s, disabling it\n",
2468 bond
->dev
->name
, slave
->dev
->name
);
2470 if (bond
->params
.mode
== BOND_MODE_8023AD
)
2471 bond_3ad_handle_link_change(slave
,
2474 if (bond_is_lb(bond
))
2475 bond_alb_handle_link_change(bond
, slave
,
2478 if (slave
== bond
->curr_active_slave
)
2484 pr_err("%s: invalid new link %d on slave %s\n",
2485 bond
->dev
->name
, slave
->new_link
,
2487 slave
->new_link
= BOND_LINK_NOCHANGE
;
2495 write_lock_bh(&bond
->curr_slave_lock
);
2496 bond_select_active_slave(bond
);
2497 write_unlock_bh(&bond
->curr_slave_lock
);
2498 unblock_netpoll_tx();
2501 bond_set_carrier(bond
);
2507 * Really a wrapper that splits the mii monitor into two phases: an
2508 * inspection, then (if inspection indicates something needs to be done)
2509 * an acquisition of appropriate locks followed by a commit phase to
2510 * implement whatever link state changes are indicated.
2512 void bond_mii_monitor(struct work_struct
*work
)
2514 struct bonding
*bond
= container_of(work
, struct bonding
,
2516 bool should_notify_peers
= false;
2517 unsigned long delay
;
2519 read_lock(&bond
->lock
);
2521 delay
= msecs_to_jiffies(bond
->params
.miimon
);
2523 if (bond
->slave_cnt
== 0)
2526 should_notify_peers
= bond_should_notify_peers(bond
);
2528 if (bond_miimon_inspect(bond
)) {
2529 read_unlock(&bond
->lock
);
2531 /* Race avoidance with bond_close cancel of workqueue */
2532 if (!rtnl_trylock()) {
2533 read_lock(&bond
->lock
);
2535 should_notify_peers
= false;
2539 read_lock(&bond
->lock
);
2541 bond_miimon_commit(bond
);
2543 read_unlock(&bond
->lock
);
2544 rtnl_unlock(); /* might sleep, hold no other locks */
2545 read_lock(&bond
->lock
);
2549 if (bond
->params
.miimon
)
2550 queue_delayed_work(bond
->wq
, &bond
->mii_work
, delay
);
2552 read_unlock(&bond
->lock
);
2554 if (should_notify_peers
) {
2555 if (!rtnl_trylock()) {
2556 read_lock(&bond
->lock
);
2557 bond
->send_peer_notif
++;
2558 read_unlock(&bond
->lock
);
2561 netdev_bonding_change(bond
->dev
, NETDEV_NOTIFY_PEERS
);
2566 static __be32
bond_glean_dev_ip(struct net_device
*dev
)
2568 struct in_device
*idev
;
2569 struct in_ifaddr
*ifa
;
2576 idev
= __in_dev_get_rcu(dev
);
2580 ifa
= idev
->ifa_list
;
2584 addr
= ifa
->ifa_local
;
2590 static int bond_has_this_ip(struct bonding
*bond
, __be32 ip
)
2592 struct vlan_entry
*vlan
;
2594 if (ip
== bond
->master_ip
)
2597 list_for_each_entry(vlan
, &bond
->vlan_list
, vlan_list
) {
2598 if (ip
== vlan
->vlan_ip
)
2606 * We go to the (large) trouble of VLAN tagging ARP frames because
2607 * switches in VLAN mode (especially if ports are configured as
2608 * "native" to a VLAN) might not pass non-tagged frames.
2610 static void bond_arp_send(struct net_device
*slave_dev
, int arp_op
, __be32 dest_ip
, __be32 src_ip
, unsigned short vlan_id
)
2612 struct sk_buff
*skb
;
2614 pr_debug("arp %d on slave %s: dst %x src %x vid %d\n", arp_op
,
2615 slave_dev
->name
, dest_ip
, src_ip
, vlan_id
);
2617 skb
= arp_create(arp_op
, ETH_P_ARP
, dest_ip
, slave_dev
, src_ip
,
2618 NULL
, slave_dev
->dev_addr
, NULL
);
2621 pr_err("ARP packet allocation failed\n");
2625 skb
= vlan_put_tag(skb
, vlan_id
);
2627 pr_err("failed to insert VLAN tag\n");
2635 static void bond_arp_send_all(struct bonding
*bond
, struct slave
*slave
)
2638 __be32
*targets
= bond
->params
.arp_targets
;
2639 struct vlan_entry
*vlan
;
2640 struct net_device
*vlan_dev
;
2643 for (i
= 0; (i
< BOND_MAX_ARP_TARGETS
); i
++) {
2646 pr_debug("basa: target %x\n", targets
[i
]);
2647 if (!bond_vlan_used(bond
)) {
2648 pr_debug("basa: empty vlan: arp_send\n");
2649 bond_arp_send(slave
->dev
, ARPOP_REQUEST
, targets
[i
],
2650 bond
->master_ip
, 0);
2655 * If VLANs are configured, we do a route lookup to
2656 * determine which VLAN interface would be used, so we
2657 * can tag the ARP with the proper VLAN tag.
2659 rt
= ip_route_output(dev_net(bond
->dev
), targets
[i
], 0,
2662 if (net_ratelimit()) {
2663 pr_warning("%s: no route to arp_ip_target %pI4\n",
2664 bond
->dev
->name
, &targets
[i
]);
2670 * This target is not on a VLAN
2672 if (rt
->dst
.dev
== bond
->dev
) {
2674 pr_debug("basa: rtdev == bond->dev: arp_send\n");
2675 bond_arp_send(slave
->dev
, ARPOP_REQUEST
, targets
[i
],
2676 bond
->master_ip
, 0);
2681 list_for_each_entry(vlan
, &bond
->vlan_list
, vlan_list
) {
2683 vlan_dev
= __vlan_find_dev_deep(bond
->dev
,
2686 if (vlan_dev
== rt
->dst
.dev
) {
2687 vlan_id
= vlan
->vlan_id
;
2688 pr_debug("basa: vlan match on %s %d\n",
2689 vlan_dev
->name
, vlan_id
);
2696 bond_arp_send(slave
->dev
, ARPOP_REQUEST
, targets
[i
],
2697 vlan
->vlan_ip
, vlan_id
);
2701 if (net_ratelimit()) {
2702 pr_warning("%s: no path to arp_ip_target %pI4 via rt.dev %s\n",
2703 bond
->dev
->name
, &targets
[i
],
2704 rt
->dst
.dev
? rt
->dst
.dev
->name
: "NULL");
2710 static void bond_validate_arp(struct bonding
*bond
, struct slave
*slave
, __be32 sip
, __be32 tip
)
2713 __be32
*targets
= bond
->params
.arp_targets
;
2715 for (i
= 0; (i
< BOND_MAX_ARP_TARGETS
) && targets
[i
]; i
++) {
2716 pr_debug("bva: sip %pI4 tip %pI4 t[%d] %pI4 bhti(tip) %d\n",
2717 &sip
, &tip
, i
, &targets
[i
],
2718 bond_has_this_ip(bond
, tip
));
2719 if (sip
== targets
[i
]) {
2720 if (bond_has_this_ip(bond
, tip
))
2721 slave
->last_arp_rx
= jiffies
;
2727 static void bond_arp_rcv(struct sk_buff
*skb
, struct bonding
*bond
,
2728 struct slave
*slave
)
2731 unsigned char *arp_ptr
;
2734 if (skb
->protocol
!= __cpu_to_be16(ETH_P_ARP
))
2737 read_lock(&bond
->lock
);
2739 pr_debug("bond_arp_rcv: bond %s skb->dev %s\n",
2740 bond
->dev
->name
, skb
->dev
->name
);
2742 if (!pskb_may_pull(skb
, arp_hdr_len(bond
->dev
)))
2746 if (arp
->ar_hln
!= bond
->dev
->addr_len
||
2747 skb
->pkt_type
== PACKET_OTHERHOST
||
2748 skb
->pkt_type
== PACKET_LOOPBACK
||
2749 arp
->ar_hrd
!= htons(ARPHRD_ETHER
) ||
2750 arp
->ar_pro
!= htons(ETH_P_IP
) ||
2754 arp_ptr
= (unsigned char *)(arp
+ 1);
2755 arp_ptr
+= bond
->dev
->addr_len
;
2756 memcpy(&sip
, arp_ptr
, 4);
2757 arp_ptr
+= 4 + bond
->dev
->addr_len
;
2758 memcpy(&tip
, arp_ptr
, 4);
2760 pr_debug("bond_arp_rcv: %s %s/%d av %d sv %d sip %pI4 tip %pI4\n",
2761 bond
->dev
->name
, slave
->dev
->name
, bond_slave_state(slave
),
2762 bond
->params
.arp_validate
, slave_do_arp_validate(bond
, slave
),
2766 * Backup slaves won't see the ARP reply, but do come through
2767 * here for each ARP probe (so we swap the sip/tip to validate
2768 * the probe). In a "redundant switch, common router" type of
2769 * configuration, the ARP probe will (hopefully) travel from
2770 * the active, through one switch, the router, then the other
2771 * switch before reaching the backup.
2773 if (bond_is_active_slave(slave
))
2774 bond_validate_arp(bond
, slave
, sip
, tip
);
2776 bond_validate_arp(bond
, slave
, tip
, sip
);
2779 read_unlock(&bond
->lock
);
2783 * this function is called regularly to monitor each slave's link
2784 * ensuring that traffic is being sent and received when arp monitoring
2785 * is used in load-balancing mode. if the adapter has been dormant, then an
2786 * arp is transmitted to generate traffic. see activebackup_arp_monitor for
2787 * arp monitoring in active backup mode.
2789 void bond_loadbalance_arp_mon(struct work_struct
*work
)
2791 struct bonding
*bond
= container_of(work
, struct bonding
,
2793 struct slave
*slave
, *oldcurrent
;
2794 int do_failover
= 0;
2798 read_lock(&bond
->lock
);
2800 delta_in_ticks
= msecs_to_jiffies(bond
->params
.arp_interval
);
2802 if (bond
->slave_cnt
== 0)
2805 read_lock(&bond
->curr_slave_lock
);
2806 oldcurrent
= bond
->curr_active_slave
;
2807 read_unlock(&bond
->curr_slave_lock
);
2809 /* see if any of the previous devices are up now (i.e. they have
2810 * xmt and rcv traffic). the curr_active_slave does not come into
2811 * the picture unless it is null. also, slave->jiffies is not needed
2812 * here because we send an arp on each slave and give a slave as
2813 * long as it needs to get the tx/rx within the delta.
2814 * TODO: what about up/down delay in arp mode? it wasn't here before
2817 bond_for_each_slave(bond
, slave
, i
) {
2818 unsigned long trans_start
= dev_trans_start(slave
->dev
);
2820 if (slave
->link
!= BOND_LINK_UP
) {
2821 if (time_in_range(jiffies
,
2822 trans_start
- delta_in_ticks
,
2823 trans_start
+ delta_in_ticks
) &&
2824 time_in_range(jiffies
,
2825 slave
->dev
->last_rx
- delta_in_ticks
,
2826 slave
->dev
->last_rx
+ delta_in_ticks
)) {
2828 slave
->link
= BOND_LINK_UP
;
2829 bond_set_active_slave(slave
);
2831 /* primary_slave has no meaning in round-robin
2832 * mode. the window of a slave being up and
2833 * curr_active_slave being null after enslaving
2837 pr_info("%s: link status definitely up for interface %s, ",
2842 pr_info("%s: interface %s is now up\n",
2848 /* slave->link == BOND_LINK_UP */
2850 /* not all switches will respond to an arp request
2851 * when the source ip is 0, so don't take the link down
2852 * if we don't know our ip yet
2854 if (!time_in_range(jiffies
,
2855 trans_start
- delta_in_ticks
,
2856 trans_start
+ 2 * delta_in_ticks
) ||
2857 !time_in_range(jiffies
,
2858 slave
->dev
->last_rx
- delta_in_ticks
,
2859 slave
->dev
->last_rx
+ 2 * delta_in_ticks
)) {
2861 slave
->link
= BOND_LINK_DOWN
;
2862 bond_set_backup_slave(slave
);
2864 if (slave
->link_failure_count
< UINT_MAX
)
2865 slave
->link_failure_count
++;
2867 pr_info("%s: interface %s is now down.\n",
2871 if (slave
== oldcurrent
)
2876 /* note: if switch is in round-robin mode, all links
2877 * must tx arp to ensure all links rx an arp - otherwise
2878 * links may oscillate or not come up at all; if switch is
2879 * in something like xor mode, there is nothing we can
2880 * do - all replies will be rx'ed on same link causing slaves
2881 * to be unstable during low/no traffic periods
2883 if (IS_UP(slave
->dev
))
2884 bond_arp_send_all(bond
, slave
);
2889 write_lock_bh(&bond
->curr_slave_lock
);
2891 bond_select_active_slave(bond
);
2893 write_unlock_bh(&bond
->curr_slave_lock
);
2894 unblock_netpoll_tx();
2898 if (bond
->params
.arp_interval
)
2899 queue_delayed_work(bond
->wq
, &bond
->arp_work
, delta_in_ticks
);
2901 read_unlock(&bond
->lock
);
2905 * Called to inspect slaves for active-backup mode ARP monitor link state
2906 * changes. Sets new_link in slaves to specify what action should take
2907 * place for the slave. Returns 0 if no changes are found, >0 if changes
2908 * to link states must be committed.
2910 * Called with bond->lock held for read.
2912 static int bond_ab_arp_inspect(struct bonding
*bond
, int delta_in_ticks
)
2914 struct slave
*slave
;
2916 unsigned long trans_start
;
2918 bond_for_each_slave(bond
, slave
, i
) {
2919 slave
->new_link
= BOND_LINK_NOCHANGE
;
2921 if (slave
->link
!= BOND_LINK_UP
) {
2922 if (time_in_range(jiffies
,
2923 slave_last_rx(bond
, slave
) - delta_in_ticks
,
2924 slave_last_rx(bond
, slave
) + delta_in_ticks
)) {
2926 slave
->new_link
= BOND_LINK_UP
;
2934 * Give slaves 2*delta after being enslaved or made
2935 * active. This avoids bouncing, as the last receive
2936 * times need a full ARP monitor cycle to be updated.
2938 if (time_in_range(jiffies
,
2939 slave
->jiffies
- delta_in_ticks
,
2940 slave
->jiffies
+ 2 * delta_in_ticks
))
2944 * Backup slave is down if:
2945 * - No current_arp_slave AND
2946 * - more than 3*delta since last receive AND
2947 * - the bond has an IP address
2949 * Note: a non-null current_arp_slave indicates
2950 * the curr_active_slave went down and we are
2951 * searching for a new one; under this condition
2952 * we only take the curr_active_slave down - this
2953 * gives each slave a chance to tx/rx traffic
2954 * before being taken out
2956 if (!bond_is_active_slave(slave
) &&
2957 !bond
->current_arp_slave
&&
2958 !time_in_range(jiffies
,
2959 slave_last_rx(bond
, slave
) - delta_in_ticks
,
2960 slave_last_rx(bond
, slave
) + 3 * delta_in_ticks
)) {
2962 slave
->new_link
= BOND_LINK_DOWN
;
2967 * Active slave is down if:
2968 * - more than 2*delta since transmitting OR
2969 * - (more than 2*delta since receive AND
2970 * the bond has an IP address)
2972 trans_start
= dev_trans_start(slave
->dev
);
2973 if (bond_is_active_slave(slave
) &&
2974 (!time_in_range(jiffies
,
2975 trans_start
- delta_in_ticks
,
2976 trans_start
+ 2 * delta_in_ticks
) ||
2977 !time_in_range(jiffies
,
2978 slave_last_rx(bond
, slave
) - delta_in_ticks
,
2979 slave_last_rx(bond
, slave
) + 2 * delta_in_ticks
))) {
2981 slave
->new_link
= BOND_LINK_DOWN
;
2990 * Called to commit link state changes noted by inspection step of
2991 * active-backup mode ARP monitor.
2993 * Called with RTNL and bond->lock for read.
2995 static void bond_ab_arp_commit(struct bonding
*bond
, int delta_in_ticks
)
2997 struct slave
*slave
;
2999 unsigned long trans_start
;
3001 bond_for_each_slave(bond
, slave
, i
) {
3002 switch (slave
->new_link
) {
3003 case BOND_LINK_NOCHANGE
:
3007 trans_start
= dev_trans_start(slave
->dev
);
3008 if ((!bond
->curr_active_slave
&&
3009 time_in_range(jiffies
,
3010 trans_start
- delta_in_ticks
,
3011 trans_start
+ delta_in_ticks
)) ||
3012 bond
->curr_active_slave
!= slave
) {
3013 slave
->link
= BOND_LINK_UP
;
3014 bond
->current_arp_slave
= NULL
;
3016 pr_info("%s: link status definitely up for interface %s.\n",
3017 bond
->dev
->name
, slave
->dev
->name
);
3019 if (!bond
->curr_active_slave
||
3020 (slave
== bond
->primary_slave
))
3027 case BOND_LINK_DOWN
:
3028 if (slave
->link_failure_count
< UINT_MAX
)
3029 slave
->link_failure_count
++;
3031 slave
->link
= BOND_LINK_DOWN
;
3032 bond_set_slave_inactive_flags(slave
);
3034 pr_info("%s: link status definitely down for interface %s, disabling it\n",
3035 bond
->dev
->name
, slave
->dev
->name
);
3037 if (slave
== bond
->curr_active_slave
) {
3038 bond
->current_arp_slave
= NULL
;
3045 pr_err("%s: impossible: new_link %d on slave %s\n",
3046 bond
->dev
->name
, slave
->new_link
,
3054 write_lock_bh(&bond
->curr_slave_lock
);
3055 bond_select_active_slave(bond
);
3056 write_unlock_bh(&bond
->curr_slave_lock
);
3057 unblock_netpoll_tx();
3060 bond_set_carrier(bond
);
3064 * Send ARP probes for active-backup mode ARP monitor.
3066 * Called with bond->lock held for read.
3068 static void bond_ab_arp_probe(struct bonding
*bond
)
3070 struct slave
*slave
;
3073 read_lock(&bond
->curr_slave_lock
);
3075 if (bond
->current_arp_slave
&& bond
->curr_active_slave
)
3076 pr_info("PROBE: c_arp %s && cas %s BAD\n",
3077 bond
->current_arp_slave
->dev
->name
,
3078 bond
->curr_active_slave
->dev
->name
);
3080 if (bond
->curr_active_slave
) {
3081 bond_arp_send_all(bond
, bond
->curr_active_slave
);
3082 read_unlock(&bond
->curr_slave_lock
);
3086 read_unlock(&bond
->curr_slave_lock
);
3088 /* if we don't have a curr_active_slave, search for the next available
3089 * backup slave from the current_arp_slave and make it the candidate
3090 * for becoming the curr_active_slave
3093 if (!bond
->current_arp_slave
) {
3094 bond
->current_arp_slave
= bond
->first_slave
;
3095 if (!bond
->current_arp_slave
)
3099 bond_set_slave_inactive_flags(bond
->current_arp_slave
);
3101 /* search for next candidate */
3102 bond_for_each_slave_from(bond
, slave
, i
, bond
->current_arp_slave
->next
) {
3103 if (IS_UP(slave
->dev
)) {
3104 slave
->link
= BOND_LINK_BACK
;
3105 bond_set_slave_active_flags(slave
);
3106 bond_arp_send_all(bond
, slave
);
3107 slave
->jiffies
= jiffies
;
3108 bond
->current_arp_slave
= slave
;
3112 /* if the link state is up at this point, we
3113 * mark it down - this can happen if we have
3114 * simultaneous link failures and
3115 * reselect_active_interface doesn't make this
3116 * one the current slave so it is still marked
3117 * up when it is actually down
3119 if (slave
->link
== BOND_LINK_UP
) {
3120 slave
->link
= BOND_LINK_DOWN
;
3121 if (slave
->link_failure_count
< UINT_MAX
)
3122 slave
->link_failure_count
++;
3124 bond_set_slave_inactive_flags(slave
);
3126 pr_info("%s: backup interface %s is now down.\n",
3127 bond
->dev
->name
, slave
->dev
->name
);
3132 void bond_activebackup_arp_mon(struct work_struct
*work
)
3134 struct bonding
*bond
= container_of(work
, struct bonding
,
3136 bool should_notify_peers
= false;
3139 read_lock(&bond
->lock
);
3141 delta_in_ticks
= msecs_to_jiffies(bond
->params
.arp_interval
);
3143 if (bond
->slave_cnt
== 0)
3146 should_notify_peers
= bond_should_notify_peers(bond
);
3148 if (bond_ab_arp_inspect(bond
, delta_in_ticks
)) {
3149 read_unlock(&bond
->lock
);
3151 /* Race avoidance with bond_close flush of workqueue */
3152 if (!rtnl_trylock()) {
3153 read_lock(&bond
->lock
);
3155 should_notify_peers
= false;
3159 read_lock(&bond
->lock
);
3161 bond_ab_arp_commit(bond
, delta_in_ticks
);
3163 read_unlock(&bond
->lock
);
3165 read_lock(&bond
->lock
);
3168 bond_ab_arp_probe(bond
);
3171 if (bond
->params
.arp_interval
)
3172 queue_delayed_work(bond
->wq
, &bond
->arp_work
, delta_in_ticks
);
3174 read_unlock(&bond
->lock
);
3176 if (should_notify_peers
) {
3177 if (!rtnl_trylock()) {
3178 read_lock(&bond
->lock
);
3179 bond
->send_peer_notif
++;
3180 read_unlock(&bond
->lock
);
3183 netdev_bonding_change(bond
->dev
, NETDEV_NOTIFY_PEERS
);
3188 /*-------------------------- netdev event handling --------------------------*/
3191 * Change device name
3193 static int bond_event_changename(struct bonding
*bond
)
3195 bond_remove_proc_entry(bond
);
3196 bond_create_proc_entry(bond
);
3198 bond_debug_reregister(bond
);
3203 static int bond_master_netdev_event(unsigned long event
,
3204 struct net_device
*bond_dev
)
3206 struct bonding
*event_bond
= netdev_priv(bond_dev
);
3209 case NETDEV_CHANGENAME
:
3210 return bond_event_changename(event_bond
);
3218 static int bond_slave_netdev_event(unsigned long event
,
3219 struct net_device
*slave_dev
)
3221 struct net_device
*bond_dev
= slave_dev
->master
;
3222 struct bonding
*bond
= netdev_priv(bond_dev
);
3225 case NETDEV_UNREGISTER
:
3227 if (bond
->setup_by_slave
)
3228 bond_release_and_destroy(bond_dev
, slave_dev
);
3230 bond_release(bond_dev
, slave_dev
);
3234 if (bond
->params
.mode
== BOND_MODE_8023AD
|| bond_is_lb(bond
)) {
3235 struct slave
*slave
;
3237 slave
= bond_get_slave_by_dev(bond
, slave_dev
);
3239 u32 old_speed
= slave
->speed
;
3240 u8 old_duplex
= slave
->duplex
;
3242 bond_update_speed_duplex(slave
);
3244 if (bond_is_lb(bond
))
3247 if (old_speed
!= slave
->speed
)
3248 bond_3ad_adapter_speed_changed(slave
);
3249 if (old_duplex
!= slave
->duplex
)
3250 bond_3ad_adapter_duplex_changed(slave
);
3257 * ... Or is it this?
3260 case NETDEV_CHANGEMTU
:
3262 * TODO: Should slaves be allowed to
3263 * independently alter their MTU? For
3264 * an active-backup bond, slaves need
3265 * not be the same type of device, so
3266 * MTUs may vary. For other modes,
3267 * slaves arguably should have the
3268 * same MTUs. To do this, we'd need to
3269 * take over the slave's change_mtu
3270 * function for the duration of their
3274 case NETDEV_CHANGENAME
:
3276 * TODO: handle changing the primary's name
3279 case NETDEV_FEAT_CHANGE
:
3280 bond_compute_features(bond
);
3290 * bond_netdev_event: handle netdev notifier chain events.
3292 * This function receives events for the netdev chain. The caller (an
3293 * ioctl handler calling blocking_notifier_call_chain) holds the necessary
3294 * locks for us to safely manipulate the slave devices (RTNL lock,
3297 static int bond_netdev_event(struct notifier_block
*this,
3298 unsigned long event
, void *ptr
)
3300 struct net_device
*event_dev
= (struct net_device
*)ptr
;
3302 pr_debug("event_dev: %s, event: %lx\n",
3303 event_dev
? event_dev
->name
: "None",
3306 if (!(event_dev
->priv_flags
& IFF_BONDING
))
3309 if (event_dev
->flags
& IFF_MASTER
) {
3310 pr_debug("IFF_MASTER\n");
3311 return bond_master_netdev_event(event
, event_dev
);
3314 if (event_dev
->flags
& IFF_SLAVE
) {
3315 pr_debug("IFF_SLAVE\n");
3316 return bond_slave_netdev_event(event
, event_dev
);
3323 * bond_inetaddr_event: handle inetaddr notifier chain events.
3325 * We keep track of device IPs primarily to use as source addresses in
3326 * ARP monitor probes (rather than spewing out broadcasts all the time).
3328 * We track one IP for the main device (if it has one), plus one per VLAN.
3330 static int bond_inetaddr_event(struct notifier_block
*this, unsigned long event
, void *ptr
)
3332 struct in_ifaddr
*ifa
= ptr
;
3333 struct net_device
*vlan_dev
, *event_dev
= ifa
->ifa_dev
->dev
;
3334 struct bond_net
*bn
= net_generic(dev_net(event_dev
), bond_net_id
);
3335 struct bonding
*bond
;
3336 struct vlan_entry
*vlan
;
3338 list_for_each_entry(bond
, &bn
->dev_list
, bond_list
) {
3339 if (bond
->dev
== event_dev
) {
3342 bond
->master_ip
= ifa
->ifa_local
;
3345 bond
->master_ip
= bond_glean_dev_ip(bond
->dev
);
3352 list_for_each_entry(vlan
, &bond
->vlan_list
, vlan_list
) {
3353 vlan_dev
= __vlan_find_dev_deep(bond
->dev
,
3355 if (vlan_dev
== event_dev
) {
3358 vlan
->vlan_ip
= ifa
->ifa_local
;
3362 bond_glean_dev_ip(vlan_dev
);
3373 static struct notifier_block bond_netdev_notifier
= {
3374 .notifier_call
= bond_netdev_event
,
3377 static struct notifier_block bond_inetaddr_notifier
= {
3378 .notifier_call
= bond_inetaddr_event
,
3381 /*---------------------------- Hashing Policies -----------------------------*/
3384 * Hash for the output device based upon layer 2 and layer 3 data. If
3385 * the packet is not IP mimic bond_xmit_hash_policy_l2()
3387 static int bond_xmit_hash_policy_l23(struct sk_buff
*skb
, int count
)
3389 struct ethhdr
*data
= (struct ethhdr
*)skb
->data
;
3390 struct iphdr
*iph
= ip_hdr(skb
);
3392 if (skb
->protocol
== htons(ETH_P_IP
)) {
3393 return ((ntohl(iph
->saddr
^ iph
->daddr
) & 0xffff) ^
3394 (data
->h_dest
[5] ^ data
->h_source
[5])) % count
;
3397 return (data
->h_dest
[5] ^ data
->h_source
[5]) % count
;
3401 * Hash for the output device based upon layer 3 and layer 4 data. If
3402 * the packet is a frag or not TCP or UDP, just use layer 3 data. If it is
3403 * altogether not IP, mimic bond_xmit_hash_policy_l2()
3405 static int bond_xmit_hash_policy_l34(struct sk_buff
*skb
, int count
)
3407 struct ethhdr
*data
= (struct ethhdr
*)skb
->data
;
3408 struct iphdr
*iph
= ip_hdr(skb
);
3409 __be16
*layer4hdr
= (__be16
*)((u32
*)iph
+ iph
->ihl
);
3412 if (skb
->protocol
== htons(ETH_P_IP
)) {
3413 if (!ip_is_fragment(iph
) &&
3414 (iph
->protocol
== IPPROTO_TCP
||
3415 iph
->protocol
== IPPROTO_UDP
)) {
3416 layer4_xor
= ntohs((*layer4hdr
^ *(layer4hdr
+ 1)));
3418 return (layer4_xor
^
3419 ((ntohl(iph
->saddr
^ iph
->daddr
)) & 0xffff)) % count
;
3423 return (data
->h_dest
[5] ^ data
->h_source
[5]) % count
;
3427 * Hash for the output device based upon layer 2 data
3429 static int bond_xmit_hash_policy_l2(struct sk_buff
*skb
, int count
)
3431 struct ethhdr
*data
= (struct ethhdr
*)skb
->data
;
3433 return (data
->h_dest
[5] ^ data
->h_source
[5]) % count
;
3436 /*-------------------------- Device entry points ----------------------------*/
3438 static int bond_open(struct net_device
*bond_dev
)
3440 struct bonding
*bond
= netdev_priv(bond_dev
);
3441 struct slave
*slave
;
3444 /* reset slave->backup and slave->inactive */
3445 read_lock(&bond
->lock
);
3446 if (bond
->slave_cnt
> 0) {
3447 read_lock(&bond
->curr_slave_lock
);
3448 bond_for_each_slave(bond
, slave
, i
) {
3449 if ((bond
->params
.mode
== BOND_MODE_ACTIVEBACKUP
)
3450 && (slave
!= bond
->curr_active_slave
)) {
3451 bond_set_slave_inactive_flags(slave
);
3453 bond_set_slave_active_flags(slave
);
3456 read_unlock(&bond
->curr_slave_lock
);
3458 read_unlock(&bond
->lock
);
3460 INIT_DELAYED_WORK(&bond
->mcast_work
, bond_resend_igmp_join_requests_delayed
);
3462 if (bond_is_lb(bond
)) {
3463 /* bond_alb_initialize must be called before the timer
3466 if (bond_alb_initialize(bond
, (bond
->params
.mode
== BOND_MODE_ALB
))) {
3467 /* something went wrong - fail the open operation */
3471 INIT_DELAYED_WORK(&bond
->alb_work
, bond_alb_monitor
);
3472 queue_delayed_work(bond
->wq
, &bond
->alb_work
, 0);
3475 if (bond
->params
.miimon
) { /* link check interval, in milliseconds. */
3476 INIT_DELAYED_WORK(&bond
->mii_work
, bond_mii_monitor
);
3477 queue_delayed_work(bond
->wq
, &bond
->mii_work
, 0);
3480 if (bond
->params
.arp_interval
) { /* arp interval, in milliseconds. */
3481 if (bond
->params
.mode
== BOND_MODE_ACTIVEBACKUP
)
3482 INIT_DELAYED_WORK(&bond
->arp_work
,
3483 bond_activebackup_arp_mon
);
3485 INIT_DELAYED_WORK(&bond
->arp_work
,
3486 bond_loadbalance_arp_mon
);
3488 queue_delayed_work(bond
->wq
, &bond
->arp_work
, 0);
3489 if (bond
->params
.arp_validate
)
3490 bond
->recv_probe
= bond_arp_rcv
;
3493 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
3494 INIT_DELAYED_WORK(&bond
->ad_work
, bond_3ad_state_machine_handler
);
3495 queue_delayed_work(bond
->wq
, &bond
->ad_work
, 0);
3496 /* register to receive LACPDUs */
3497 bond
->recv_probe
= bond_3ad_lacpdu_recv
;
3498 bond_3ad_initiate_agg_selection(bond
, 1);
3504 static int bond_close(struct net_device
*bond_dev
)
3506 struct bonding
*bond
= netdev_priv(bond_dev
);
3508 write_lock_bh(&bond
->lock
);
3510 bond
->send_peer_notif
= 0;
3512 write_unlock_bh(&bond
->lock
);
3514 if (bond
->params
.miimon
) { /* link check interval, in milliseconds. */
3515 cancel_delayed_work_sync(&bond
->mii_work
);
3518 if (bond
->params
.arp_interval
) { /* arp interval, in milliseconds. */
3519 cancel_delayed_work_sync(&bond
->arp_work
);
3522 switch (bond
->params
.mode
) {
3523 case BOND_MODE_8023AD
:
3524 cancel_delayed_work_sync(&bond
->ad_work
);
3528 cancel_delayed_work_sync(&bond
->alb_work
);
3534 if (delayed_work_pending(&bond
->mcast_work
))
3535 cancel_delayed_work_sync(&bond
->mcast_work
);
3537 if (bond_is_lb(bond
)) {
3538 /* Must be called only after all
3539 * slaves have been released
3541 bond_alb_deinitialize(bond
);
3543 bond
->recv_probe
= NULL
;
3548 static struct rtnl_link_stats64
*bond_get_stats(struct net_device
*bond_dev
,
3549 struct rtnl_link_stats64
*stats
)
3551 struct bonding
*bond
= netdev_priv(bond_dev
);
3552 struct rtnl_link_stats64 temp
;
3553 struct slave
*slave
;
3556 memset(stats
, 0, sizeof(*stats
));
3558 read_lock_bh(&bond
->lock
);
3560 bond_for_each_slave(bond
, slave
, i
) {
3561 const struct rtnl_link_stats64
*sstats
=
3562 dev_get_stats(slave
->dev
, &temp
);
3564 stats
->rx_packets
+= sstats
->rx_packets
;
3565 stats
->rx_bytes
+= sstats
->rx_bytes
;
3566 stats
->rx_errors
+= sstats
->rx_errors
;
3567 stats
->rx_dropped
+= sstats
->rx_dropped
;
3569 stats
->tx_packets
+= sstats
->tx_packets
;
3570 stats
->tx_bytes
+= sstats
->tx_bytes
;
3571 stats
->tx_errors
+= sstats
->tx_errors
;
3572 stats
->tx_dropped
+= sstats
->tx_dropped
;
3574 stats
->multicast
+= sstats
->multicast
;
3575 stats
->collisions
+= sstats
->collisions
;
3577 stats
->rx_length_errors
+= sstats
->rx_length_errors
;
3578 stats
->rx_over_errors
+= sstats
->rx_over_errors
;
3579 stats
->rx_crc_errors
+= sstats
->rx_crc_errors
;
3580 stats
->rx_frame_errors
+= sstats
->rx_frame_errors
;
3581 stats
->rx_fifo_errors
+= sstats
->rx_fifo_errors
;
3582 stats
->rx_missed_errors
+= sstats
->rx_missed_errors
;
3584 stats
->tx_aborted_errors
+= sstats
->tx_aborted_errors
;
3585 stats
->tx_carrier_errors
+= sstats
->tx_carrier_errors
;
3586 stats
->tx_fifo_errors
+= sstats
->tx_fifo_errors
;
3587 stats
->tx_heartbeat_errors
+= sstats
->tx_heartbeat_errors
;
3588 stats
->tx_window_errors
+= sstats
->tx_window_errors
;
3591 read_unlock_bh(&bond
->lock
);
3596 static int bond_do_ioctl(struct net_device
*bond_dev
, struct ifreq
*ifr
, int cmd
)
3598 struct net_device
*slave_dev
= NULL
;
3599 struct ifbond k_binfo
;
3600 struct ifbond __user
*u_binfo
= NULL
;
3601 struct ifslave k_sinfo
;
3602 struct ifslave __user
*u_sinfo
= NULL
;
3603 struct mii_ioctl_data
*mii
= NULL
;
3606 pr_debug("bond_ioctl: master=%s, cmd=%d\n", bond_dev
->name
, cmd
);
3618 * We do this again just in case we were called by SIOCGMIIREG
3619 * instead of SIOCGMIIPHY.
3626 if (mii
->reg_num
== 1) {
3627 struct bonding
*bond
= netdev_priv(bond_dev
);
3629 read_lock(&bond
->lock
);
3630 read_lock(&bond
->curr_slave_lock
);
3631 if (netif_carrier_ok(bond
->dev
))
3632 mii
->val_out
= BMSR_LSTATUS
;
3634 read_unlock(&bond
->curr_slave_lock
);
3635 read_unlock(&bond
->lock
);
3639 case BOND_INFO_QUERY_OLD
:
3640 case SIOCBONDINFOQUERY
:
3641 u_binfo
= (struct ifbond __user
*)ifr
->ifr_data
;
3643 if (copy_from_user(&k_binfo
, u_binfo
, sizeof(ifbond
)))
3646 res
= bond_info_query(bond_dev
, &k_binfo
);
3648 copy_to_user(u_binfo
, &k_binfo
, sizeof(ifbond
)))
3652 case BOND_SLAVE_INFO_QUERY_OLD
:
3653 case SIOCBONDSLAVEINFOQUERY
:
3654 u_sinfo
= (struct ifslave __user
*)ifr
->ifr_data
;
3656 if (copy_from_user(&k_sinfo
, u_sinfo
, sizeof(ifslave
)))
3659 res
= bond_slave_info_query(bond_dev
, &k_sinfo
);
3661 copy_to_user(u_sinfo
, &k_sinfo
, sizeof(ifslave
)))
3670 if (!capable(CAP_NET_ADMIN
))
3673 slave_dev
= dev_get_by_name(dev_net(bond_dev
), ifr
->ifr_slave
);
3675 pr_debug("slave_dev=%p:\n", slave_dev
);
3680 pr_debug("slave_dev->name=%s:\n", slave_dev
->name
);
3682 case BOND_ENSLAVE_OLD
:
3683 case SIOCBONDENSLAVE
:
3684 res
= bond_enslave(bond_dev
, slave_dev
);
3686 case BOND_RELEASE_OLD
:
3687 case SIOCBONDRELEASE
:
3688 res
= bond_release(bond_dev
, slave_dev
);
3690 case BOND_SETHWADDR_OLD
:
3691 case SIOCBONDSETHWADDR
:
3692 res
= bond_sethwaddr(bond_dev
, slave_dev
);
3694 case BOND_CHANGE_ACTIVE_OLD
:
3695 case SIOCBONDCHANGEACTIVE
:
3696 res
= bond_ioctl_change_active(bond_dev
, slave_dev
);
3708 static bool bond_addr_in_mc_list(unsigned char *addr
,
3709 struct netdev_hw_addr_list
*list
,
3712 struct netdev_hw_addr
*ha
;
3714 netdev_hw_addr_list_for_each(ha
, list
)
3715 if (!memcmp(ha
->addr
, addr
, addrlen
))
3721 static void bond_change_rx_flags(struct net_device
*bond_dev
, int change
)
3723 struct bonding
*bond
= netdev_priv(bond_dev
);
3725 if (change
& IFF_PROMISC
)
3726 bond_set_promiscuity(bond
,
3727 bond_dev
->flags
& IFF_PROMISC
? 1 : -1);
3729 if (change
& IFF_ALLMULTI
)
3730 bond_set_allmulti(bond
,
3731 bond_dev
->flags
& IFF_ALLMULTI
? 1 : -1);
3734 static void bond_set_multicast_list(struct net_device
*bond_dev
)
3736 struct bonding
*bond
= netdev_priv(bond_dev
);
3737 struct netdev_hw_addr
*ha
;
3740 read_lock(&bond
->lock
);
3742 /* looking for addresses to add to slaves' mc list */
3743 netdev_for_each_mc_addr(ha
, bond_dev
) {
3744 found
= bond_addr_in_mc_list(ha
->addr
, &bond
->mc_list
,
3745 bond_dev
->addr_len
);
3747 bond_mc_add(bond
, ha
->addr
);
3750 /* looking for addresses to delete from slaves' list */
3751 netdev_hw_addr_list_for_each(ha
, &bond
->mc_list
) {
3752 found
= bond_addr_in_mc_list(ha
->addr
, &bond_dev
->mc
,
3753 bond_dev
->addr_len
);
3755 bond_mc_del(bond
, ha
->addr
);
3758 /* save master's multicast list */
3759 __hw_addr_flush(&bond
->mc_list
);
3760 __hw_addr_add_multiple(&bond
->mc_list
, &bond_dev
->mc
,
3761 bond_dev
->addr_len
, NETDEV_HW_ADDR_T_MULTICAST
);
3763 read_unlock(&bond
->lock
);
3766 static int bond_neigh_setup(struct net_device
*dev
, struct neigh_parms
*parms
)
3768 struct bonding
*bond
= netdev_priv(dev
);
3769 struct slave
*slave
= bond
->first_slave
;
3772 const struct net_device_ops
*slave_ops
3773 = slave
->dev
->netdev_ops
;
3774 if (slave_ops
->ndo_neigh_setup
)
3775 return slave_ops
->ndo_neigh_setup(slave
->dev
, parms
);
3781 * Change the MTU of all of a master's slaves to match the master
3783 static int bond_change_mtu(struct net_device
*bond_dev
, int new_mtu
)
3785 struct bonding
*bond
= netdev_priv(bond_dev
);
3786 struct slave
*slave
, *stop_at
;
3790 pr_debug("bond=%p, name=%s, new_mtu=%d\n", bond
,
3791 (bond_dev
? bond_dev
->name
: "None"), new_mtu
);
3793 /* Can't hold bond->lock with bh disabled here since
3794 * some base drivers panic. On the other hand we can't
3795 * hold bond->lock without bh disabled because we'll
3796 * deadlock. The only solution is to rely on the fact
3797 * that we're under rtnl_lock here, and the slaves
3798 * list won't change. This doesn't solve the problem
3799 * of setting the slave's MTU while it is
3800 * transmitting, but the assumption is that the base
3801 * driver can handle that.
3803 * TODO: figure out a way to safely iterate the slaves
3804 * list, but without holding a lock around the actual
3805 * call to the base driver.
3808 bond_for_each_slave(bond
, slave
, i
) {
3809 pr_debug("s %p s->p %p c_m %p\n",
3812 slave
->dev
->netdev_ops
->ndo_change_mtu
);
3814 res
= dev_set_mtu(slave
->dev
, new_mtu
);
3817 /* If we failed to set the slave's mtu to the new value
3818 * we must abort the operation even in ACTIVE_BACKUP
3819 * mode, because if we allow the backup slaves to have
3820 * different mtu values than the active slave we'll
3821 * need to change their mtu when doing a failover. That
3822 * means changing their mtu from timer context, which
3823 * is probably not a good idea.
3825 pr_debug("err %d %s\n", res
, slave
->dev
->name
);
3830 bond_dev
->mtu
= new_mtu
;
3835 /* unwind from head to the slave that failed */
3837 bond_for_each_slave_from_to(bond
, slave
, i
, bond
->first_slave
, stop_at
) {
3840 tmp_res
= dev_set_mtu(slave
->dev
, bond_dev
->mtu
);
3842 pr_debug("unwind err %d dev %s\n",
3843 tmp_res
, slave
->dev
->name
);
3853 * Note that many devices must be down to change the HW address, and
3854 * downing the master releases all slaves. We can make bonds full of
3855 * bonding devices to test this, however.
3857 static int bond_set_mac_address(struct net_device
*bond_dev
, void *addr
)
3859 struct bonding
*bond
= netdev_priv(bond_dev
);
3860 struct sockaddr
*sa
= addr
, tmp_sa
;
3861 struct slave
*slave
, *stop_at
;
3865 if (bond
->params
.mode
== BOND_MODE_ALB
)
3866 return bond_alb_set_mac_address(bond_dev
, addr
);
3869 pr_debug("bond=%p, name=%s\n",
3870 bond
, bond_dev
? bond_dev
->name
: "None");
3873 * If fail_over_mac is set to active, do nothing and return
3874 * success. Returning an error causes ifenslave to fail.
3876 if (bond
->params
.fail_over_mac
== BOND_FOM_ACTIVE
)
3879 if (!is_valid_ether_addr(sa
->sa_data
))
3880 return -EADDRNOTAVAIL
;
3882 /* Can't hold bond->lock with bh disabled here since
3883 * some base drivers panic. On the other hand we can't
3884 * hold bond->lock without bh disabled because we'll
3885 * deadlock. The only solution is to rely on the fact
3886 * that we're under rtnl_lock here, and the slaves
3887 * list won't change. This doesn't solve the problem
3888 * of setting the slave's hw address while it is
3889 * transmitting, but the assumption is that the base
3890 * driver can handle that.
3892 * TODO: figure out a way to safely iterate the slaves
3893 * list, but without holding a lock around the actual
3894 * call to the base driver.
3897 bond_for_each_slave(bond
, slave
, i
) {
3898 const struct net_device_ops
*slave_ops
= slave
->dev
->netdev_ops
;
3899 pr_debug("slave %p %s\n", slave
, slave
->dev
->name
);
3901 if (slave_ops
->ndo_set_mac_address
== NULL
) {
3903 pr_debug("EOPNOTSUPP %s\n", slave
->dev
->name
);
3907 res
= dev_set_mac_address(slave
->dev
, addr
);
3909 /* TODO: consider downing the slave
3911 * User should expect communications
3912 * breakage anyway until ARP finish
3915 pr_debug("err %d %s\n", res
, slave
->dev
->name
);
3921 memcpy(bond_dev
->dev_addr
, sa
->sa_data
, bond_dev
->addr_len
);
3925 memcpy(tmp_sa
.sa_data
, bond_dev
->dev_addr
, bond_dev
->addr_len
);
3926 tmp_sa
.sa_family
= bond_dev
->type
;
3928 /* unwind from head to the slave that failed */
3930 bond_for_each_slave_from_to(bond
, slave
, i
, bond
->first_slave
, stop_at
) {
3933 tmp_res
= dev_set_mac_address(slave
->dev
, &tmp_sa
);
3935 pr_debug("unwind err %d dev %s\n",
3936 tmp_res
, slave
->dev
->name
);
3943 static int bond_xmit_roundrobin(struct sk_buff
*skb
, struct net_device
*bond_dev
)
3945 struct bonding
*bond
= netdev_priv(bond_dev
);
3946 struct slave
*slave
, *start_at
;
3947 int i
, slave_no
, res
= 1;
3948 struct iphdr
*iph
= ip_hdr(skb
);
3951 * Start with the curr_active_slave that joined the bond as the
3952 * default for sending IGMP traffic. For failover purposes one
3953 * needs to maintain some consistency for the interface that will
3954 * send the join/membership reports. The curr_active_slave found
3955 * will send all of this type of traffic.
3957 if ((iph
->protocol
== IPPROTO_IGMP
) &&
3958 (skb
->protocol
== htons(ETH_P_IP
))) {
3960 read_lock(&bond
->curr_slave_lock
);
3961 slave
= bond
->curr_active_slave
;
3962 read_unlock(&bond
->curr_slave_lock
);
3968 * Concurrent TX may collide on rr_tx_counter; we accept
3969 * that as being rare enough not to justify using an
3972 slave_no
= bond
->rr_tx_counter
++ % bond
->slave_cnt
;
3974 bond_for_each_slave(bond
, slave
, i
) {
3982 bond_for_each_slave_from(bond
, slave
, i
, start_at
) {
3983 if (IS_UP(slave
->dev
) &&
3984 (slave
->link
== BOND_LINK_UP
) &&
3985 bond_is_active_slave(slave
)) {
3986 res
= bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
3993 /* no suitable interface, frame not sent */
3997 return NETDEV_TX_OK
;
4002 * in active-backup mode, we know that bond->curr_active_slave is always valid if
4003 * the bond has a usable interface.
4005 static int bond_xmit_activebackup(struct sk_buff
*skb
, struct net_device
*bond_dev
)
4007 struct bonding
*bond
= netdev_priv(bond_dev
);
4010 read_lock(&bond
->curr_slave_lock
);
4012 if (bond
->curr_active_slave
)
4013 res
= bond_dev_queue_xmit(bond
, skb
,
4014 bond
->curr_active_slave
->dev
);
4017 /* no suitable interface, frame not sent */
4020 read_unlock(&bond
->curr_slave_lock
);
4022 return NETDEV_TX_OK
;
4026 * In bond_xmit_xor() , we determine the output device by using a pre-
4027 * determined xmit_hash_policy(), If the selected device is not enabled,
4028 * find the next active slave.
4030 static int bond_xmit_xor(struct sk_buff
*skb
, struct net_device
*bond_dev
)
4032 struct bonding
*bond
= netdev_priv(bond_dev
);
4033 struct slave
*slave
, *start_at
;
4038 slave_no
= bond
->xmit_hash_policy(skb
, bond
->slave_cnt
);
4040 bond_for_each_slave(bond
, slave
, i
) {
4048 bond_for_each_slave_from(bond
, slave
, i
, start_at
) {
4049 if (IS_UP(slave
->dev
) &&
4050 (slave
->link
== BOND_LINK_UP
) &&
4051 bond_is_active_slave(slave
)) {
4052 res
= bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
4058 /* no suitable interface, frame not sent */
4062 return NETDEV_TX_OK
;
4066 * in broadcast mode, we send everything to all usable interfaces.
4068 static int bond_xmit_broadcast(struct sk_buff
*skb
, struct net_device
*bond_dev
)
4070 struct bonding
*bond
= netdev_priv(bond_dev
);
4071 struct slave
*slave
, *start_at
;
4072 struct net_device
*tx_dev
= NULL
;
4076 read_lock(&bond
->curr_slave_lock
);
4077 start_at
= bond
->curr_active_slave
;
4078 read_unlock(&bond
->curr_slave_lock
);
4083 bond_for_each_slave_from(bond
, slave
, i
, start_at
) {
4084 if (IS_UP(slave
->dev
) &&
4085 (slave
->link
== BOND_LINK_UP
) &&
4086 bond_is_active_slave(slave
)) {
4088 struct sk_buff
*skb2
= skb_clone(skb
, GFP_ATOMIC
);
4090 pr_err("%s: Error: bond_xmit_broadcast(): skb_clone() failed\n",
4095 res
= bond_dev_queue_xmit(bond
, skb2
, tx_dev
);
4097 dev_kfree_skb(skb2
);
4101 tx_dev
= slave
->dev
;
4106 res
= bond_dev_queue_xmit(bond
, skb
, tx_dev
);
4110 /* no suitable interface, frame not sent */
4113 /* frame sent to all suitable interfaces */
4114 return NETDEV_TX_OK
;
4117 /*------------------------- Device initialization ---------------------------*/
4119 static void bond_set_xmit_hash_policy(struct bonding
*bond
)
4121 switch (bond
->params
.xmit_policy
) {
4122 case BOND_XMIT_POLICY_LAYER23
:
4123 bond
->xmit_hash_policy
= bond_xmit_hash_policy_l23
;
4125 case BOND_XMIT_POLICY_LAYER34
:
4126 bond
->xmit_hash_policy
= bond_xmit_hash_policy_l34
;
4128 case BOND_XMIT_POLICY_LAYER2
:
4130 bond
->xmit_hash_policy
= bond_xmit_hash_policy_l2
;
4136 * Lookup the slave that corresponds to a qid
4138 static inline int bond_slave_override(struct bonding
*bond
,
4139 struct sk_buff
*skb
)
4142 struct slave
*slave
= NULL
;
4143 struct slave
*check_slave
;
4145 if (!skb
->queue_mapping
)
4148 /* Find out if any slaves have the same mapping as this skb. */
4149 bond_for_each_slave(bond
, check_slave
, i
) {
4150 if (check_slave
->queue_id
== skb
->queue_mapping
) {
4151 slave
= check_slave
;
4156 /* If the slave isn't UP, use default transmit policy. */
4157 if (slave
&& slave
->queue_id
&& IS_UP(slave
->dev
) &&
4158 (slave
->link
== BOND_LINK_UP
)) {
4159 res
= bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
4166 static u16
bond_select_queue(struct net_device
*dev
, struct sk_buff
*skb
)
4169 * This helper function exists to help dev_pick_tx get the correct
4170 * destination queue. Using a helper function skips a call to
4171 * skb_tx_hash and will put the skbs in the queue we expect on their
4172 * way down to the bonding driver.
4174 u16 txq
= skb_rx_queue_recorded(skb
) ? skb_get_rx_queue(skb
) : 0;
4177 * Save the original txq to restore before passing to the driver
4179 bond_queue_mapping(skb
) = skb
->queue_mapping
;
4181 if (unlikely(txq
>= dev
->real_num_tx_queues
)) {
4183 txq
-= dev
->real_num_tx_queues
;
4184 } while (txq
>= dev
->real_num_tx_queues
);
4189 static netdev_tx_t
__bond_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
4191 struct bonding
*bond
= netdev_priv(dev
);
4193 if (TX_QUEUE_OVERRIDE(bond
->params
.mode
)) {
4194 if (!bond_slave_override(bond
, skb
))
4195 return NETDEV_TX_OK
;
4198 switch (bond
->params
.mode
) {
4199 case BOND_MODE_ROUNDROBIN
:
4200 return bond_xmit_roundrobin(skb
, dev
);
4201 case BOND_MODE_ACTIVEBACKUP
:
4202 return bond_xmit_activebackup(skb
, dev
);
4204 return bond_xmit_xor(skb
, dev
);
4205 case BOND_MODE_BROADCAST
:
4206 return bond_xmit_broadcast(skb
, dev
);
4207 case BOND_MODE_8023AD
:
4208 return bond_3ad_xmit_xor(skb
, dev
);
4211 return bond_alb_xmit(skb
, dev
);
4213 /* Should never happen, mode already checked */
4214 pr_err("%s: Error: Unknown bonding mode %d\n",
4215 dev
->name
, bond
->params
.mode
);
4218 return NETDEV_TX_OK
;
4222 static netdev_tx_t
bond_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
4224 struct bonding
*bond
= netdev_priv(dev
);
4225 netdev_tx_t ret
= NETDEV_TX_OK
;
4228 * If we risk deadlock from transmitting this in the
4229 * netpoll path, tell netpoll to queue the frame for later tx
4231 if (is_netpoll_tx_blocked(dev
))
4232 return NETDEV_TX_BUSY
;
4234 read_lock(&bond
->lock
);
4236 if (bond
->slave_cnt
)
4237 ret
= __bond_start_xmit(skb
, dev
);
4241 read_unlock(&bond
->lock
);
4247 * set bond mode specific net device operations
4249 void bond_set_mode_ops(struct bonding
*bond
, int mode
)
4251 struct net_device
*bond_dev
= bond
->dev
;
4254 case BOND_MODE_ROUNDROBIN
:
4256 case BOND_MODE_ACTIVEBACKUP
:
4259 bond_set_xmit_hash_policy(bond
);
4261 case BOND_MODE_BROADCAST
:
4263 case BOND_MODE_8023AD
:
4264 bond_set_xmit_hash_policy(bond
);
4271 /* Should never happen, mode already checked */
4272 pr_err("%s: Error: Unknown bonding mode %d\n",
4273 bond_dev
->name
, mode
);
4278 static void bond_ethtool_get_drvinfo(struct net_device
*bond_dev
,
4279 struct ethtool_drvinfo
*drvinfo
)
4281 strncpy(drvinfo
->driver
, DRV_NAME
, 32);
4282 strncpy(drvinfo
->version
, DRV_VERSION
, 32);
4283 snprintf(drvinfo
->fw_version
, 32, "%d", BOND_ABI_VERSION
);
4286 static const struct ethtool_ops bond_ethtool_ops
= {
4287 .get_drvinfo
= bond_ethtool_get_drvinfo
,
4288 .get_link
= ethtool_op_get_link
,
4291 static const struct net_device_ops bond_netdev_ops
= {
4292 .ndo_init
= bond_init
,
4293 .ndo_uninit
= bond_uninit
,
4294 .ndo_open
= bond_open
,
4295 .ndo_stop
= bond_close
,
4296 .ndo_start_xmit
= bond_start_xmit
,
4297 .ndo_select_queue
= bond_select_queue
,
4298 .ndo_get_stats64
= bond_get_stats
,
4299 .ndo_do_ioctl
= bond_do_ioctl
,
4300 .ndo_change_rx_flags
= bond_change_rx_flags
,
4301 .ndo_set_rx_mode
= bond_set_multicast_list
,
4302 .ndo_change_mtu
= bond_change_mtu
,
4303 .ndo_set_mac_address
= bond_set_mac_address
,
4304 .ndo_neigh_setup
= bond_neigh_setup
,
4305 .ndo_vlan_rx_add_vid
= bond_vlan_rx_add_vid
,
4306 .ndo_vlan_rx_kill_vid
= bond_vlan_rx_kill_vid
,
4307 #ifdef CONFIG_NET_POLL_CONTROLLER
4308 .ndo_netpoll_setup
= bond_netpoll_setup
,
4309 .ndo_netpoll_cleanup
= bond_netpoll_cleanup
,
4310 .ndo_poll_controller
= bond_poll_controller
,
4312 .ndo_add_slave
= bond_enslave
,
4313 .ndo_del_slave
= bond_release
,
4314 .ndo_fix_features
= bond_fix_features
,
4317 static void bond_destructor(struct net_device
*bond_dev
)
4319 struct bonding
*bond
= netdev_priv(bond_dev
);
4321 destroy_workqueue(bond
->wq
);
4322 free_netdev(bond_dev
);
4325 static void bond_setup(struct net_device
*bond_dev
)
4327 struct bonding
*bond
= netdev_priv(bond_dev
);
4329 /* initialize rwlocks */
4330 rwlock_init(&bond
->lock
);
4331 rwlock_init(&bond
->curr_slave_lock
);
4333 bond
->params
= bonding_defaults
;
4335 /* Initialize pointers */
4336 bond
->dev
= bond_dev
;
4337 INIT_LIST_HEAD(&bond
->vlan_list
);
4339 /* Initialize the device entry points */
4340 ether_setup(bond_dev
);
4341 bond_dev
->netdev_ops
= &bond_netdev_ops
;
4342 bond_dev
->ethtool_ops
= &bond_ethtool_ops
;
4343 bond_set_mode_ops(bond
, bond
->params
.mode
);
4345 bond_dev
->destructor
= bond_destructor
;
4347 /* Initialize the device options */
4348 bond_dev
->tx_queue_len
= 0;
4349 bond_dev
->flags
|= IFF_MASTER
|IFF_MULTICAST
;
4350 bond_dev
->priv_flags
|= IFF_BONDING
;
4351 bond_dev
->priv_flags
&= ~(IFF_XMIT_DST_RELEASE
| IFF_TX_SKB_SHARING
);
4353 /* At first, we block adding VLANs. That's the only way to
4354 * prevent problems that occur when adding VLANs over an
4355 * empty bond. The block will be removed once non-challenged
4356 * slaves are enslaved.
4358 bond_dev
->features
|= NETIF_F_VLAN_CHALLENGED
;
4360 /* don't acquire bond device's netif_tx_lock when
4362 bond_dev
->features
|= NETIF_F_LLTX
;
4364 /* By default, we declare the bond to be fully
4365 * VLAN hardware accelerated capable. Special
4366 * care is taken in the various xmit functions
4367 * when there are slaves that are not hw accel
4371 bond_dev
->hw_features
= BOND_VLAN_FEATURES
|
4372 NETIF_F_HW_VLAN_TX
|
4373 NETIF_F_HW_VLAN_RX
|
4374 NETIF_F_HW_VLAN_FILTER
;
4376 bond_dev
->hw_features
&= ~(NETIF_F_ALL_CSUM
& ~NETIF_F_NO_CSUM
);
4377 bond_dev
->features
|= bond_dev
->hw_features
;
4380 static void bond_work_cancel_all(struct bonding
*bond
)
4382 if (bond
->params
.miimon
&& delayed_work_pending(&bond
->mii_work
))
4383 cancel_delayed_work_sync(&bond
->mii_work
);
4385 if (bond
->params
.arp_interval
&& delayed_work_pending(&bond
->arp_work
))
4386 cancel_delayed_work_sync(&bond
->arp_work
);
4388 if (bond
->params
.mode
== BOND_MODE_ALB
&&
4389 delayed_work_pending(&bond
->alb_work
))
4390 cancel_delayed_work_sync(&bond
->alb_work
);
4392 if (bond
->params
.mode
== BOND_MODE_8023AD
&&
4393 delayed_work_pending(&bond
->ad_work
))
4394 cancel_delayed_work_sync(&bond
->ad_work
);
4396 if (delayed_work_pending(&bond
->mcast_work
))
4397 cancel_delayed_work_sync(&bond
->mcast_work
);
4401 * Destroy a bonding device.
4402 * Must be under rtnl_lock when this function is called.
4404 static void bond_uninit(struct net_device
*bond_dev
)
4406 struct bonding
*bond
= netdev_priv(bond_dev
);
4407 struct vlan_entry
*vlan
, *tmp
;
4409 bond_netpoll_cleanup(bond_dev
);
4411 /* Release the bonded slaves */
4412 bond_release_all(bond_dev
);
4414 list_del(&bond
->bond_list
);
4416 bond_work_cancel_all(bond
);
4418 bond_remove_proc_entry(bond
);
4420 bond_debug_unregister(bond
);
4422 __hw_addr_flush(&bond
->mc_list
);
4424 list_for_each_entry_safe(vlan
, tmp
, &bond
->vlan_list
, vlan_list
) {
4425 list_del(&vlan
->vlan_list
);
4430 /*------------------------- Module initialization ---------------------------*/
4433 * Convert string input module parms. Accept either the
4434 * number of the mode or its string name. A bit complicated because
4435 * some mode names are substrings of other names, and calls from sysfs
4436 * may have whitespace in the name (trailing newlines, for example).
4438 int bond_parse_parm(const char *buf
, const struct bond_parm_tbl
*tbl
)
4440 int modeint
= -1, i
, rv
;
4441 char *p
, modestr
[BOND_MAX_MODENAME_LEN
+ 1] = { 0, };
4443 for (p
= (char *)buf
; *p
; p
++)
4444 if (!(isdigit(*p
) || isspace(*p
)))
4448 rv
= sscanf(buf
, "%20s", modestr
);
4450 rv
= sscanf(buf
, "%d", &modeint
);
4455 for (i
= 0; tbl
[i
].modename
; i
++) {
4456 if (modeint
== tbl
[i
].mode
)
4458 if (strcmp(modestr
, tbl
[i
].modename
) == 0)
4465 static int bond_check_params(struct bond_params
*params
)
4467 int arp_validate_value
, fail_over_mac_value
, primary_reselect_value
;
4470 * Convert string parameters.
4473 bond_mode
= bond_parse_parm(mode
, bond_mode_tbl
);
4474 if (bond_mode
== -1) {
4475 pr_err("Error: Invalid bonding mode \"%s\"\n",
4476 mode
== NULL
? "NULL" : mode
);
4481 if (xmit_hash_policy
) {
4482 if ((bond_mode
!= BOND_MODE_XOR
) &&
4483 (bond_mode
!= BOND_MODE_8023AD
)) {
4484 pr_info("xmit_hash_policy param is irrelevant in mode %s\n",
4485 bond_mode_name(bond_mode
));
4487 xmit_hashtype
= bond_parse_parm(xmit_hash_policy
,
4489 if (xmit_hashtype
== -1) {
4490 pr_err("Error: Invalid xmit_hash_policy \"%s\"\n",
4491 xmit_hash_policy
== NULL
? "NULL" :
4499 if (bond_mode
!= BOND_MODE_8023AD
) {
4500 pr_info("lacp_rate param is irrelevant in mode %s\n",
4501 bond_mode_name(bond_mode
));
4503 lacp_fast
= bond_parse_parm(lacp_rate
, bond_lacp_tbl
);
4504 if (lacp_fast
== -1) {
4505 pr_err("Error: Invalid lacp rate \"%s\"\n",
4506 lacp_rate
== NULL
? "NULL" : lacp_rate
);
4513 params
->ad_select
= bond_parse_parm(ad_select
, ad_select_tbl
);
4514 if (params
->ad_select
== -1) {
4515 pr_err("Error: Invalid ad_select \"%s\"\n",
4516 ad_select
== NULL
? "NULL" : ad_select
);
4520 if (bond_mode
!= BOND_MODE_8023AD
) {
4521 pr_warning("ad_select param only affects 802.3ad mode\n");
4524 params
->ad_select
= BOND_AD_STABLE
;
4527 if (max_bonds
< 0) {
4528 pr_warning("Warning: max_bonds (%d) not in range %d-%d, so it was reset to BOND_DEFAULT_MAX_BONDS (%d)\n",
4529 max_bonds
, 0, INT_MAX
, BOND_DEFAULT_MAX_BONDS
);
4530 max_bonds
= BOND_DEFAULT_MAX_BONDS
;
4534 pr_warning("Warning: miimon module parameter (%d), not in range 0-%d, so it was reset to %d\n",
4535 miimon
, INT_MAX
, BOND_LINK_MON_INTERV
);
4536 miimon
= BOND_LINK_MON_INTERV
;
4540 pr_warning("Warning: updelay module parameter (%d), not in range 0-%d, so it was reset to 0\n",
4545 if (downdelay
< 0) {
4546 pr_warning("Warning: downdelay module parameter (%d), not in range 0-%d, so it was reset to 0\n",
4547 downdelay
, INT_MAX
);
4551 if ((use_carrier
!= 0) && (use_carrier
!= 1)) {
4552 pr_warning("Warning: use_carrier module parameter (%d), not of valid value (0/1), so it was set to 1\n",
4557 if (num_peer_notif
< 0 || num_peer_notif
> 255) {
4558 pr_warning("Warning: num_grat_arp/num_unsol_na (%d) not in range 0-255 so it was reset to 1\n",
4563 /* reset values for 802.3ad */
4564 if (bond_mode
== BOND_MODE_8023AD
) {
4566 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");
4567 pr_warning("Forcing miimon to 100msec\n");
4572 if (tx_queues
< 1 || tx_queues
> 255) {
4573 pr_warning("Warning: tx_queues (%d) should be between "
4574 "1 and 255, resetting to %d\n",
4575 tx_queues
, BOND_DEFAULT_TX_QUEUES
);
4576 tx_queues
= BOND_DEFAULT_TX_QUEUES
;
4579 if ((all_slaves_active
!= 0) && (all_slaves_active
!= 1)) {
4580 pr_warning("Warning: all_slaves_active module parameter (%d), "
4581 "not of valid value (0/1), so it was set to "
4582 "0\n", all_slaves_active
);
4583 all_slaves_active
= 0;
4586 if (resend_igmp
< 0 || resend_igmp
> 255) {
4587 pr_warning("Warning: resend_igmp (%d) should be between "
4588 "0 and 255, resetting to %d\n",
4589 resend_igmp
, BOND_DEFAULT_RESEND_IGMP
);
4590 resend_igmp
= BOND_DEFAULT_RESEND_IGMP
;
4593 /* reset values for TLB/ALB */
4594 if ((bond_mode
== BOND_MODE_TLB
) ||
4595 (bond_mode
== BOND_MODE_ALB
)) {
4597 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");
4598 pr_warning("Forcing miimon to 100msec\n");
4603 if (bond_mode
== BOND_MODE_ALB
) {
4604 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",
4609 if (updelay
|| downdelay
) {
4610 /* just warn the user the up/down delay will have
4611 * no effect since miimon is zero...
4613 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",
4614 updelay
, downdelay
);
4617 /* don't allow arp monitoring */
4619 pr_warning("Warning: miimon (%d) and arp_interval (%d) can't be used simultaneously, disabling ARP monitoring\n",
4620 miimon
, arp_interval
);
4624 if ((updelay
% miimon
) != 0) {
4625 pr_warning("Warning: updelay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
4627 (updelay
/ miimon
) * miimon
);
4632 if ((downdelay
% miimon
) != 0) {
4633 pr_warning("Warning: downdelay (%d) is not a multiple of miimon (%d), downdelay rounded to %d ms\n",
4635 (downdelay
/ miimon
) * miimon
);
4638 downdelay
/= miimon
;
4641 if (arp_interval
< 0) {
4642 pr_warning("Warning: arp_interval module parameter (%d) , not in range 0-%d, so it was reset to %d\n",
4643 arp_interval
, INT_MAX
, BOND_LINK_ARP_INTERV
);
4644 arp_interval
= BOND_LINK_ARP_INTERV
;
4647 for (arp_ip_count
= 0;
4648 (arp_ip_count
< BOND_MAX_ARP_TARGETS
) && arp_ip_target
[arp_ip_count
];
4650 /* not complete check, but should be good enough to
4652 if (!isdigit(arp_ip_target
[arp_ip_count
][0])) {
4653 pr_warning("Warning: bad arp_ip_target module parameter (%s), ARP monitoring will not be performed\n",
4654 arp_ip_target
[arp_ip_count
]);
4657 __be32 ip
= in_aton(arp_ip_target
[arp_ip_count
]);
4658 arp_target
[arp_ip_count
] = ip
;
4662 if (arp_interval
&& !arp_ip_count
) {
4663 /* don't allow arping if no arp_ip_target given... */
4664 pr_warning("Warning: arp_interval module parameter (%d) specified without providing an arp_ip_target parameter, arp_interval was reset to 0\n",
4670 if (bond_mode
!= BOND_MODE_ACTIVEBACKUP
) {
4671 pr_err("arp_validate only supported in active-backup mode\n");
4674 if (!arp_interval
) {
4675 pr_err("arp_validate requires arp_interval\n");
4679 arp_validate_value
= bond_parse_parm(arp_validate
,
4681 if (arp_validate_value
== -1) {
4682 pr_err("Error: invalid arp_validate \"%s\"\n",
4683 arp_validate
== NULL
? "NULL" : arp_validate
);
4687 arp_validate_value
= 0;
4690 pr_info("MII link monitoring set to %d ms\n", miimon
);
4691 } else if (arp_interval
) {
4694 pr_info("ARP monitoring set to %d ms, validate %s, with %d target(s):",
4696 arp_validate_tbl
[arp_validate_value
].modename
,
4699 for (i
= 0; i
< arp_ip_count
; i
++)
4700 pr_info(" %s", arp_ip_target
[i
]);
4704 } else if (max_bonds
) {
4705 /* miimon and arp_interval not set, we need one so things
4706 * work as expected, see bonding.txt for details
4708 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");
4711 if (primary
&& !USES_PRIMARY(bond_mode
)) {
4712 /* currently, using a primary only makes sense
4713 * in active backup, TLB or ALB modes
4715 pr_warning("Warning: %s primary device specified but has no effect in %s mode\n",
4716 primary
, bond_mode_name(bond_mode
));
4720 if (primary
&& primary_reselect
) {
4721 primary_reselect_value
= bond_parse_parm(primary_reselect
,
4723 if (primary_reselect_value
== -1) {
4724 pr_err("Error: Invalid primary_reselect \"%s\"\n",
4726 NULL
? "NULL" : primary_reselect
);
4730 primary_reselect_value
= BOND_PRI_RESELECT_ALWAYS
;
4733 if (fail_over_mac
) {
4734 fail_over_mac_value
= bond_parse_parm(fail_over_mac
,
4736 if (fail_over_mac_value
== -1) {
4737 pr_err("Error: invalid fail_over_mac \"%s\"\n",
4738 arp_validate
== NULL
? "NULL" : arp_validate
);
4742 if (bond_mode
!= BOND_MODE_ACTIVEBACKUP
)
4743 pr_warning("Warning: fail_over_mac only affects active-backup mode.\n");
4745 fail_over_mac_value
= BOND_FOM_NONE
;
4748 /* fill params struct with the proper values */
4749 params
->mode
= bond_mode
;
4750 params
->xmit_policy
= xmit_hashtype
;
4751 params
->miimon
= miimon
;
4752 params
->num_peer_notif
= num_peer_notif
;
4753 params
->arp_interval
= arp_interval
;
4754 params
->arp_validate
= arp_validate_value
;
4755 params
->updelay
= updelay
;
4756 params
->downdelay
= downdelay
;
4757 params
->use_carrier
= use_carrier
;
4758 params
->lacp_fast
= lacp_fast
;
4759 params
->primary
[0] = 0;
4760 params
->primary_reselect
= primary_reselect_value
;
4761 params
->fail_over_mac
= fail_over_mac_value
;
4762 params
->tx_queues
= tx_queues
;
4763 params
->all_slaves_active
= all_slaves_active
;
4764 params
->resend_igmp
= resend_igmp
;
4765 params
->min_links
= min_links
;
4768 strncpy(params
->primary
, primary
, IFNAMSIZ
);
4769 params
->primary
[IFNAMSIZ
- 1] = 0;
4772 memcpy(params
->arp_targets
, arp_target
, sizeof(arp_target
));
4777 static struct lock_class_key bonding_netdev_xmit_lock_key
;
4778 static struct lock_class_key bonding_netdev_addr_lock_key
;
4780 static void bond_set_lockdep_class_one(struct net_device
*dev
,
4781 struct netdev_queue
*txq
,
4784 lockdep_set_class(&txq
->_xmit_lock
,
4785 &bonding_netdev_xmit_lock_key
);
4788 static void bond_set_lockdep_class(struct net_device
*dev
)
4790 lockdep_set_class(&dev
->addr_list_lock
,
4791 &bonding_netdev_addr_lock_key
);
4792 netdev_for_each_tx_queue(dev
, bond_set_lockdep_class_one
, NULL
);
4796 * Called from registration process
4798 static int bond_init(struct net_device
*bond_dev
)
4800 struct bonding
*bond
= netdev_priv(bond_dev
);
4801 struct bond_net
*bn
= net_generic(dev_net(bond_dev
), bond_net_id
);
4802 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
4804 pr_debug("Begin bond_init for %s\n", bond_dev
->name
);
4807 * Initialize locks that may be required during
4808 * en/deslave operations. All of the bond_open work
4809 * (of which this is part) should really be moved to
4810 * a phase prior to dev_open
4812 spin_lock_init(&(bond_info
->tx_hashtbl_lock
));
4813 spin_lock_init(&(bond_info
->rx_hashtbl_lock
));
4815 bond
->wq
= create_singlethread_workqueue(bond_dev
->name
);
4819 bond_set_lockdep_class(bond_dev
);
4821 bond_create_proc_entry(bond
);
4822 list_add_tail(&bond
->bond_list
, &bn
->dev_list
);
4824 bond_prepare_sysfs_group(bond
);
4826 bond_debug_register(bond
);
4828 __hw_addr_init(&bond
->mc_list
);
4832 static int bond_validate(struct nlattr
*tb
[], struct nlattr
*data
[])
4834 if (tb
[IFLA_ADDRESS
]) {
4835 if (nla_len(tb
[IFLA_ADDRESS
]) != ETH_ALEN
)
4837 if (!is_valid_ether_addr(nla_data(tb
[IFLA_ADDRESS
])))
4838 return -EADDRNOTAVAIL
;
4843 static int bond_get_tx_queues(struct net
*net
, struct nlattr
*tb
[],
4844 unsigned int *num_queues
,
4845 unsigned int *real_num_queues
)
4847 *num_queues
= tx_queues
;
4851 static struct rtnl_link_ops bond_link_ops __read_mostly
= {
4853 .priv_size
= sizeof(struct bonding
),
4854 .setup
= bond_setup
,
4855 .validate
= bond_validate
,
4856 .get_tx_queues
= bond_get_tx_queues
,
4859 /* Create a new bond based on the specified name and bonding parameters.
4860 * If name is NULL, obtain a suitable "bond%d" name for us.
4861 * Caller must NOT hold rtnl_lock; we need to release it here before we
4862 * set up our sysfs entries.
4864 int bond_create(struct net
*net
, const char *name
)
4866 struct net_device
*bond_dev
;
4871 bond_dev
= alloc_netdev_mq(sizeof(struct bonding
),
4872 name
? name
: "bond%d",
4873 bond_setup
, tx_queues
);
4875 pr_err("%s: eek! can't alloc netdev!\n", name
);
4880 dev_net_set(bond_dev
, net
);
4881 bond_dev
->rtnl_link_ops
= &bond_link_ops
;
4883 res
= register_netdevice(bond_dev
);
4885 netif_carrier_off(bond_dev
);
4889 bond_destructor(bond_dev
);
4893 static int __net_init
bond_net_init(struct net
*net
)
4895 struct bond_net
*bn
= net_generic(net
, bond_net_id
);
4898 INIT_LIST_HEAD(&bn
->dev_list
);
4900 bond_create_proc_dir(bn
);
4901 bond_create_sysfs(bn
);
4906 static void __net_exit
bond_net_exit(struct net
*net
)
4908 struct bond_net
*bn
= net_generic(net
, bond_net_id
);
4910 bond_destroy_sysfs(bn
);
4911 bond_destroy_proc_dir(bn
);
4914 static struct pernet_operations bond_net_ops
= {
4915 .init
= bond_net_init
,
4916 .exit
= bond_net_exit
,
4918 .size
= sizeof(struct bond_net
),
4921 static int __init
bonding_init(void)
4926 pr_info("%s", bond_version
);
4928 res
= bond_check_params(&bonding_defaults
);
4932 res
= register_pernet_subsys(&bond_net_ops
);
4936 res
= rtnl_link_register(&bond_link_ops
);
4940 bond_create_debugfs();
4942 for (i
= 0; i
< max_bonds
; i
++) {
4943 res
= bond_create(&init_net
, NULL
);
4948 register_netdevice_notifier(&bond_netdev_notifier
);
4949 register_inetaddr_notifier(&bond_inetaddr_notifier
);
4953 rtnl_link_unregister(&bond_link_ops
);
4955 unregister_pernet_subsys(&bond_net_ops
);
4960 static void __exit
bonding_exit(void)
4962 unregister_netdevice_notifier(&bond_netdev_notifier
);
4963 unregister_inetaddr_notifier(&bond_inetaddr_notifier
);
4965 bond_destroy_debugfs();
4967 rtnl_link_unregister(&bond_link_ops
);
4968 unregister_pernet_subsys(&bond_net_ops
);
4970 #ifdef CONFIG_NET_POLL_CONTROLLER
4972 * Make sure we don't have an imbalance on our netpoll blocking
4974 WARN_ON(atomic_read(&netpoll_block_tx
));
4978 module_init(bonding_init
);
4979 module_exit(bonding_exit
);
4980 MODULE_LICENSE("GPL");
4981 MODULE_VERSION(DRV_VERSION
);
4982 MODULE_DESCRIPTION(DRV_DESCRIPTION
", v" DRV_VERSION
);
4983 MODULE_AUTHOR("Thomas Davis, tadavis@lbl.gov and many others");
4984 MODULE_ALIAS_RTNL_LINK("bond");