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 int bond_vlan_rx_add_vid(struct net_device
*bond_dev
, uint16_t vid
)
433 struct bonding
*bond
= netdev_priv(bond_dev
);
434 struct slave
*slave
, *stop_at
;
437 bond_for_each_slave(bond
, slave
, i
) {
438 res
= vlan_vid_add(slave
->dev
, vid
);
443 res
= bond_add_vlan(bond
, vid
);
445 pr_err("%s: Error: Failed to add vlan id %d\n",
446 bond_dev
->name
, vid
);
453 /* unwind from head to the slave that failed */
455 bond_for_each_slave_from_to(bond
, slave
, i
, bond
->first_slave
, stop_at
)
456 vlan_vid_del(slave
->dev
, vid
);
462 * bond_vlan_rx_kill_vid - Propagates deleting an id to slaves
463 * @bond_dev: bonding net device that got called
464 * @vid: vlan id being removed
466 static int bond_vlan_rx_kill_vid(struct net_device
*bond_dev
, uint16_t vid
)
468 struct bonding
*bond
= netdev_priv(bond_dev
);
472 bond_for_each_slave(bond
, slave
, i
)
473 vlan_vid_del(slave
->dev
, vid
);
475 res
= bond_del_vlan(bond
, vid
);
477 pr_err("%s: Error: Failed to remove vlan id %d\n",
478 bond_dev
->name
, vid
);
485 static void bond_add_vlans_on_slave(struct bonding
*bond
, struct net_device
*slave_dev
)
487 struct vlan_entry
*vlan
;
490 list_for_each_entry(vlan
, &bond
->vlan_list
, vlan_list
) {
491 res
= vlan_vid_add(slave_dev
, vlan
->vlan_id
);
493 pr_warning("%s: Failed to add vlan id %d to device %s\n",
494 bond
->dev
->name
, vlan
->vlan_id
,
499 static void bond_del_vlans_from_slave(struct bonding
*bond
,
500 struct net_device
*slave_dev
)
502 struct vlan_entry
*vlan
;
504 list_for_each_entry(vlan
, &bond
->vlan_list
, vlan_list
) {
507 vlan_vid_del(slave_dev
, vlan
->vlan_id
);
511 /*------------------------------- Link status -------------------------------*/
514 * Set the carrier state for the master according to the state of its
515 * slaves. If any slaves are up, the master is up. In 802.3ad mode,
516 * do special 802.3ad magic.
518 * Returns zero if carrier state does not change, nonzero if it does.
520 static int bond_set_carrier(struct bonding
*bond
)
525 if (bond
->slave_cnt
== 0)
528 if (bond
->params
.mode
== BOND_MODE_8023AD
)
529 return bond_3ad_set_carrier(bond
);
531 bond_for_each_slave(bond
, slave
, i
) {
532 if (slave
->link
== BOND_LINK_UP
) {
533 if (!netif_carrier_ok(bond
->dev
)) {
534 netif_carrier_on(bond
->dev
);
542 if (netif_carrier_ok(bond
->dev
)) {
543 netif_carrier_off(bond
->dev
);
550 * Get link speed and duplex from the slave's base driver
551 * using ethtool. If for some reason the call fails or the
552 * values are invalid, set speed and duplex to -1,
555 static int bond_update_speed_duplex(struct slave
*slave
)
557 struct net_device
*slave_dev
= slave
->dev
;
558 struct ethtool_cmd ecmd
;
562 slave
->speed
= SPEED_UNKNOWN
;
563 slave
->duplex
= DUPLEX_UNKNOWN
;
565 res
= __ethtool_get_settings(slave_dev
, &ecmd
);
569 slave_speed
= ethtool_cmd_speed(&ecmd
);
570 if (slave_speed
== 0 || slave_speed
== ((__u32
) -1))
573 switch (ecmd
.duplex
) {
581 slave
->speed
= slave_speed
;
582 slave
->duplex
= ecmd
.duplex
;
588 * if <dev> supports MII link status reporting, check its link status.
590 * We either do MII/ETHTOOL ioctls, or check netif_carrier_ok(),
591 * depending upon the setting of the use_carrier parameter.
593 * Return either BMSR_LSTATUS, meaning that the link is up (or we
594 * can't tell and just pretend it is), or 0, meaning that the link is
597 * If reporting is non-zero, instead of faking link up, return -1 if
598 * both ETHTOOL and MII ioctls fail (meaning the device does not
599 * support them). If use_carrier is set, return whatever it says.
600 * It'd be nice if there was a good way to tell if a driver supports
601 * netif_carrier, but there really isn't.
603 static int bond_check_dev_link(struct bonding
*bond
,
604 struct net_device
*slave_dev
, int reporting
)
606 const struct net_device_ops
*slave_ops
= slave_dev
->netdev_ops
;
607 int (*ioctl
)(struct net_device
*, struct ifreq
*, int);
609 struct mii_ioctl_data
*mii
;
611 if (!reporting
&& !netif_running(slave_dev
))
614 if (bond
->params
.use_carrier
)
615 return netif_carrier_ok(slave_dev
) ? BMSR_LSTATUS
: 0;
617 /* Try to get link status using Ethtool first. */
618 if (slave_dev
->ethtool_ops
) {
619 if (slave_dev
->ethtool_ops
->get_link
) {
622 link
= slave_dev
->ethtool_ops
->get_link(slave_dev
);
624 return link
? BMSR_LSTATUS
: 0;
628 /* Ethtool can't be used, fallback to MII ioctls. */
629 ioctl
= slave_ops
->ndo_do_ioctl
;
631 /* TODO: set pointer to correct ioctl on a per team member */
632 /* bases to make this more efficient. that is, once */
633 /* we determine the correct ioctl, we will always */
634 /* call it and not the others for that team */
638 * We cannot assume that SIOCGMIIPHY will also read a
639 * register; not all network drivers (e.g., e100)
643 /* Yes, the mii is overlaid on the ifreq.ifr_ifru */
644 strncpy(ifr
.ifr_name
, slave_dev
->name
, IFNAMSIZ
);
646 if (IOCTL(slave_dev
, &ifr
, SIOCGMIIPHY
) == 0) {
647 mii
->reg_num
= MII_BMSR
;
648 if (IOCTL(slave_dev
, &ifr
, SIOCGMIIREG
) == 0)
649 return mii
->val_out
& BMSR_LSTATUS
;
654 * If reporting, report that either there's no dev->do_ioctl,
655 * or both SIOCGMIIREG and get_link failed (meaning that we
656 * cannot report link status). If not reporting, pretend
659 return reporting
? -1 : BMSR_LSTATUS
;
662 /*----------------------------- Multicast list ------------------------------*/
665 * Push the promiscuity flag down to appropriate slaves
667 static int bond_set_promiscuity(struct bonding
*bond
, int inc
)
670 if (USES_PRIMARY(bond
->params
.mode
)) {
671 /* write lock already acquired */
672 if (bond
->curr_active_slave
) {
673 err
= dev_set_promiscuity(bond
->curr_active_slave
->dev
,
679 bond_for_each_slave(bond
, slave
, i
) {
680 err
= dev_set_promiscuity(slave
->dev
, inc
);
689 * Push the allmulti flag down to all slaves
691 static int bond_set_allmulti(struct bonding
*bond
, int inc
)
694 if (USES_PRIMARY(bond
->params
.mode
)) {
695 /* write lock already acquired */
696 if (bond
->curr_active_slave
) {
697 err
= dev_set_allmulti(bond
->curr_active_slave
->dev
,
703 bond_for_each_slave(bond
, slave
, i
) {
704 err
= dev_set_allmulti(slave
->dev
, inc
);
713 * Add a Multicast address to slaves
716 static void bond_mc_add(struct bonding
*bond
, void *addr
)
718 if (USES_PRIMARY(bond
->params
.mode
)) {
719 /* write lock already acquired */
720 if (bond
->curr_active_slave
)
721 dev_mc_add(bond
->curr_active_slave
->dev
, addr
);
726 bond_for_each_slave(bond
, slave
, i
)
727 dev_mc_add(slave
->dev
, addr
);
732 * Remove a multicast address from slave
735 static void bond_mc_del(struct bonding
*bond
, void *addr
)
737 if (USES_PRIMARY(bond
->params
.mode
)) {
738 /* write lock already acquired */
739 if (bond
->curr_active_slave
)
740 dev_mc_del(bond
->curr_active_slave
->dev
, addr
);
744 bond_for_each_slave(bond
, slave
, i
) {
745 dev_mc_del(slave
->dev
, addr
);
751 static void __bond_resend_igmp_join_requests(struct net_device
*dev
)
753 struct in_device
*in_dev
;
756 in_dev
= __in_dev_get_rcu(dev
);
758 ip_mc_rejoin_groups(in_dev
);
763 * Retrieve the list of registered multicast addresses for the bonding
764 * device and retransmit an IGMP JOIN request to the current active
767 static void bond_resend_igmp_join_requests(struct bonding
*bond
)
769 struct net_device
*bond_dev
, *vlan_dev
, *master_dev
;
770 struct vlan_entry
*vlan
;
772 read_lock(&bond
->lock
);
774 bond_dev
= bond
->dev
;
776 /* rejoin all groups on bond device */
777 __bond_resend_igmp_join_requests(bond_dev
);
780 * if bond is enslaved to a bridge,
781 * then rejoin all groups on its master
783 master_dev
= bond_dev
->master
;
785 if ((master_dev
->priv_flags
& IFF_EBRIDGE
)
786 && (bond_dev
->priv_flags
& IFF_BRIDGE_PORT
))
787 __bond_resend_igmp_join_requests(master_dev
);
789 /* rejoin all groups on vlan devices */
790 list_for_each_entry(vlan
, &bond
->vlan_list
, vlan_list
) {
792 vlan_dev
= __vlan_find_dev_deep(bond_dev
,
796 __bond_resend_igmp_join_requests(vlan_dev
);
799 if (--bond
->igmp_retrans
> 0)
800 queue_delayed_work(bond
->wq
, &bond
->mcast_work
, HZ
/5);
802 read_unlock(&bond
->lock
);
805 static void bond_resend_igmp_join_requests_delayed(struct work_struct
*work
)
807 struct bonding
*bond
= container_of(work
, struct bonding
,
809 bond_resend_igmp_join_requests(bond
);
813 * flush all members of flush->mc_list from device dev->mc_list
815 static void bond_mc_list_flush(struct net_device
*bond_dev
,
816 struct net_device
*slave_dev
)
818 struct bonding
*bond
= netdev_priv(bond_dev
);
819 struct netdev_hw_addr
*ha
;
821 netdev_for_each_mc_addr(ha
, bond_dev
)
822 dev_mc_del(slave_dev
, ha
->addr
);
824 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
825 /* del lacpdu mc addr from mc list */
826 u8 lacpdu_multicast
[ETH_ALEN
] = MULTICAST_LACPDU_ADDR
;
828 dev_mc_del(slave_dev
, lacpdu_multicast
);
832 /*--------------------------- Active slave change ---------------------------*/
835 * Update the mc list and multicast-related flags for the new and
836 * old active slaves (if any) according to the multicast mode, and
837 * promiscuous flags unconditionally.
839 static void bond_mc_swap(struct bonding
*bond
, struct slave
*new_active
,
840 struct slave
*old_active
)
842 struct netdev_hw_addr
*ha
;
844 if (!USES_PRIMARY(bond
->params
.mode
))
845 /* nothing to do - mc list is already up-to-date on
851 if (bond
->dev
->flags
& IFF_PROMISC
)
852 dev_set_promiscuity(old_active
->dev
, -1);
854 if (bond
->dev
->flags
& IFF_ALLMULTI
)
855 dev_set_allmulti(old_active
->dev
, -1);
857 netdev_for_each_mc_addr(ha
, bond
->dev
)
858 dev_mc_del(old_active
->dev
, ha
->addr
);
862 /* FIXME: Signal errors upstream. */
863 if (bond
->dev
->flags
& IFF_PROMISC
)
864 dev_set_promiscuity(new_active
->dev
, 1);
866 if (bond
->dev
->flags
& IFF_ALLMULTI
)
867 dev_set_allmulti(new_active
->dev
, 1);
869 netdev_for_each_mc_addr(ha
, bond
->dev
)
870 dev_mc_add(new_active
->dev
, ha
->addr
);
875 * bond_do_fail_over_mac
877 * Perform special MAC address swapping for fail_over_mac settings
879 * Called with RTNL, bond->lock for read, curr_slave_lock for write_bh.
881 static void bond_do_fail_over_mac(struct bonding
*bond
,
882 struct slave
*new_active
,
883 struct slave
*old_active
)
884 __releases(&bond
->curr_slave_lock
)
885 __releases(&bond
->lock
)
886 __acquires(&bond
->lock
)
887 __acquires(&bond
->curr_slave_lock
)
889 u8 tmp_mac
[ETH_ALEN
];
890 struct sockaddr saddr
;
893 switch (bond
->params
.fail_over_mac
) {
894 case BOND_FOM_ACTIVE
:
896 memcpy(bond
->dev
->dev_addr
, new_active
->dev
->dev_addr
,
897 new_active
->dev
->addr_len
);
899 case BOND_FOM_FOLLOW
:
901 * if new_active && old_active, swap them
902 * if just old_active, do nothing (going to no active slave)
903 * if just new_active, set new_active to bond's MAC
908 write_unlock_bh(&bond
->curr_slave_lock
);
909 read_unlock(&bond
->lock
);
912 memcpy(tmp_mac
, new_active
->dev
->dev_addr
, ETH_ALEN
);
913 memcpy(saddr
.sa_data
, old_active
->dev
->dev_addr
,
915 saddr
.sa_family
= new_active
->dev
->type
;
917 memcpy(saddr
.sa_data
, bond
->dev
->dev_addr
, ETH_ALEN
);
918 saddr
.sa_family
= bond
->dev
->type
;
921 rv
= dev_set_mac_address(new_active
->dev
, &saddr
);
923 pr_err("%s: Error %d setting MAC of slave %s\n",
924 bond
->dev
->name
, -rv
, new_active
->dev
->name
);
931 memcpy(saddr
.sa_data
, tmp_mac
, ETH_ALEN
);
932 saddr
.sa_family
= old_active
->dev
->type
;
934 rv
= dev_set_mac_address(old_active
->dev
, &saddr
);
936 pr_err("%s: Error %d setting MAC of slave %s\n",
937 bond
->dev
->name
, -rv
, new_active
->dev
->name
);
939 read_lock(&bond
->lock
);
940 write_lock_bh(&bond
->curr_slave_lock
);
943 pr_err("%s: bond_do_fail_over_mac impossible: bad policy %d\n",
944 bond
->dev
->name
, bond
->params
.fail_over_mac
);
950 static bool bond_should_change_active(struct bonding
*bond
)
952 struct slave
*prim
= bond
->primary_slave
;
953 struct slave
*curr
= bond
->curr_active_slave
;
955 if (!prim
|| !curr
|| curr
->link
!= BOND_LINK_UP
)
957 if (bond
->force_primary
) {
958 bond
->force_primary
= false;
961 if (bond
->params
.primary_reselect
== BOND_PRI_RESELECT_BETTER
&&
962 (prim
->speed
< curr
->speed
||
963 (prim
->speed
== curr
->speed
&& prim
->duplex
<= curr
->duplex
)))
965 if (bond
->params
.primary_reselect
== BOND_PRI_RESELECT_FAILURE
)
971 * find_best_interface - select the best available slave to be the active one
972 * @bond: our bonding struct
974 * Warning: Caller must hold curr_slave_lock for writing.
976 static struct slave
*bond_find_best_slave(struct bonding
*bond
)
978 struct slave
*new_active
, *old_active
;
979 struct slave
*bestslave
= NULL
;
980 int mintime
= bond
->params
.updelay
;
983 new_active
= bond
->curr_active_slave
;
985 if (!new_active
) { /* there were no active slaves left */
986 if (bond
->slave_cnt
> 0) /* found one slave */
987 new_active
= bond
->first_slave
;
989 return NULL
; /* still no slave, return NULL */
992 if ((bond
->primary_slave
) &&
993 bond
->primary_slave
->link
== BOND_LINK_UP
&&
994 bond_should_change_active(bond
)) {
995 new_active
= bond
->primary_slave
;
998 /* remember where to stop iterating over the slaves */
999 old_active
= new_active
;
1001 bond_for_each_slave_from(bond
, new_active
, i
, old_active
) {
1002 if (new_active
->link
== BOND_LINK_UP
) {
1004 } else if (new_active
->link
== BOND_LINK_BACK
&&
1005 IS_UP(new_active
->dev
)) {
1006 /* link up, but waiting for stabilization */
1007 if (new_active
->delay
< mintime
) {
1008 mintime
= new_active
->delay
;
1009 bestslave
= new_active
;
1017 static bool bond_should_notify_peers(struct bonding
*bond
)
1019 struct slave
*slave
= bond
->curr_active_slave
;
1021 pr_debug("bond_should_notify_peers: bond %s slave %s\n",
1022 bond
->dev
->name
, slave
? slave
->dev
->name
: "NULL");
1024 if (!slave
|| !bond
->send_peer_notif
||
1025 test_bit(__LINK_STATE_LINKWATCH_PENDING
, &slave
->dev
->state
))
1028 bond
->send_peer_notif
--;
1033 * change_active_interface - change the active slave into the specified one
1034 * @bond: our bonding struct
1035 * @new: the new slave to make the active one
1037 * Set the new slave to the bond's settings and unset them on the old
1038 * curr_active_slave.
1039 * Setting include flags, mc-list, promiscuity, allmulti, etc.
1041 * If @new's link state is %BOND_LINK_BACK we'll set it to %BOND_LINK_UP,
1042 * because it is apparently the best available slave we have, even though its
1043 * updelay hasn't timed out yet.
1045 * If new_active is not NULL, caller must hold bond->lock for read and
1046 * curr_slave_lock for write_bh.
1048 void bond_change_active_slave(struct bonding
*bond
, struct slave
*new_active
)
1050 struct slave
*old_active
= bond
->curr_active_slave
;
1052 if (old_active
== new_active
)
1056 new_active
->jiffies
= jiffies
;
1058 if (new_active
->link
== BOND_LINK_BACK
) {
1059 if (USES_PRIMARY(bond
->params
.mode
)) {
1060 pr_info("%s: making interface %s the new active one %d ms earlier.\n",
1061 bond
->dev
->name
, new_active
->dev
->name
,
1062 (bond
->params
.updelay
- new_active
->delay
) * bond
->params
.miimon
);
1065 new_active
->delay
= 0;
1066 new_active
->link
= BOND_LINK_UP
;
1068 if (bond
->params
.mode
== BOND_MODE_8023AD
)
1069 bond_3ad_handle_link_change(new_active
, BOND_LINK_UP
);
1071 if (bond_is_lb(bond
))
1072 bond_alb_handle_link_change(bond
, new_active
, BOND_LINK_UP
);
1074 if (USES_PRIMARY(bond
->params
.mode
)) {
1075 pr_info("%s: making interface %s the new active one.\n",
1076 bond
->dev
->name
, new_active
->dev
->name
);
1081 if (USES_PRIMARY(bond
->params
.mode
))
1082 bond_mc_swap(bond
, new_active
, old_active
);
1084 if (bond_is_lb(bond
)) {
1085 bond_alb_handle_active_change(bond
, new_active
);
1087 bond_set_slave_inactive_flags(old_active
);
1089 bond_set_slave_active_flags(new_active
);
1091 bond
->curr_active_slave
= new_active
;
1094 if (bond
->params
.mode
== BOND_MODE_ACTIVEBACKUP
) {
1096 bond_set_slave_inactive_flags(old_active
);
1099 bool should_notify_peers
= false;
1101 bond_set_slave_active_flags(new_active
);
1103 if (bond
->params
.fail_over_mac
)
1104 bond_do_fail_over_mac(bond
, new_active
,
1107 if (netif_running(bond
->dev
)) {
1108 bond
->send_peer_notif
=
1109 bond
->params
.num_peer_notif
;
1110 should_notify_peers
=
1111 bond_should_notify_peers(bond
);
1114 write_unlock_bh(&bond
->curr_slave_lock
);
1115 read_unlock(&bond
->lock
);
1117 netdev_bonding_change(bond
->dev
, NETDEV_BONDING_FAILOVER
);
1118 if (should_notify_peers
)
1119 netdev_bonding_change(bond
->dev
,
1120 NETDEV_NOTIFY_PEERS
);
1122 read_lock(&bond
->lock
);
1123 write_lock_bh(&bond
->curr_slave_lock
);
1127 /* resend IGMP joins since active slave has changed or
1128 * all were sent on curr_active_slave.
1129 * resend only if bond is brought up with the affected
1130 * bonding modes and the retransmission is enabled */
1131 if (netif_running(bond
->dev
) && (bond
->params
.resend_igmp
> 0) &&
1132 ((USES_PRIMARY(bond
->params
.mode
) && new_active
) ||
1133 bond
->params
.mode
== BOND_MODE_ROUNDROBIN
)) {
1134 bond
->igmp_retrans
= bond
->params
.resend_igmp
;
1135 queue_delayed_work(bond
->wq
, &bond
->mcast_work
, 0);
1140 * bond_select_active_slave - select a new active slave, if needed
1141 * @bond: our bonding struct
1143 * This functions should be called when one of the following occurs:
1144 * - The old curr_active_slave has been released or lost its link.
1145 * - The primary_slave has got its link back.
1146 * - A slave has got its link back and there's no old curr_active_slave.
1148 * Caller must hold bond->lock for read and curr_slave_lock for write_bh.
1150 void bond_select_active_slave(struct bonding
*bond
)
1152 struct slave
*best_slave
;
1155 best_slave
= bond_find_best_slave(bond
);
1156 if (best_slave
!= bond
->curr_active_slave
) {
1157 bond_change_active_slave(bond
, best_slave
);
1158 rv
= bond_set_carrier(bond
);
1162 if (netif_carrier_ok(bond
->dev
)) {
1163 pr_info("%s: first active interface up!\n",
1166 pr_info("%s: now running without any active interface !\n",
1172 /*--------------------------- slave list handling ---------------------------*/
1175 * This function attaches the slave to the end of list.
1177 * bond->lock held for writing by caller.
1179 static void bond_attach_slave(struct bonding
*bond
, struct slave
*new_slave
)
1181 if (bond
->first_slave
== NULL
) { /* attaching the first slave */
1182 new_slave
->next
= new_slave
;
1183 new_slave
->prev
= new_slave
;
1184 bond
->first_slave
= new_slave
;
1186 new_slave
->next
= bond
->first_slave
;
1187 new_slave
->prev
= bond
->first_slave
->prev
;
1188 new_slave
->next
->prev
= new_slave
;
1189 new_slave
->prev
->next
= new_slave
;
1196 * This function detaches the slave from the list.
1197 * WARNING: no check is made to verify if the slave effectively
1198 * belongs to <bond>.
1199 * Nothing is freed on return, structures are just unchained.
1200 * If any slave pointer in bond was pointing to <slave>,
1201 * it should be changed by the calling function.
1203 * bond->lock held for writing by caller.
1205 static void bond_detach_slave(struct bonding
*bond
, struct slave
*slave
)
1208 slave
->next
->prev
= slave
->prev
;
1211 slave
->prev
->next
= slave
->next
;
1213 if (bond
->first_slave
== slave
) { /* slave is the first slave */
1214 if (bond
->slave_cnt
> 1) { /* there are more slave */
1215 bond
->first_slave
= slave
->next
;
1217 bond
->first_slave
= NULL
; /* slave was the last one */
1226 #ifdef CONFIG_NET_POLL_CONTROLLER
1227 static inline int slave_enable_netpoll(struct slave
*slave
)
1232 np
= kzalloc(sizeof(*np
), GFP_KERNEL
);
1237 np
->dev
= slave
->dev
;
1238 strlcpy(np
->dev_name
, slave
->dev
->name
, IFNAMSIZ
);
1239 err
= __netpoll_setup(np
);
1248 static inline void slave_disable_netpoll(struct slave
*slave
)
1250 struct netpoll
*np
= slave
->np
;
1256 synchronize_rcu_bh();
1257 __netpoll_cleanup(np
);
1260 static inline bool slave_dev_support_netpoll(struct net_device
*slave_dev
)
1262 if (slave_dev
->priv_flags
& IFF_DISABLE_NETPOLL
)
1264 if (!slave_dev
->netdev_ops
->ndo_poll_controller
)
1269 static void bond_poll_controller(struct net_device
*bond_dev
)
1273 static void __bond_netpoll_cleanup(struct bonding
*bond
)
1275 struct slave
*slave
;
1278 bond_for_each_slave(bond
, slave
, i
)
1279 if (IS_UP(slave
->dev
))
1280 slave_disable_netpoll(slave
);
1282 static void bond_netpoll_cleanup(struct net_device
*bond_dev
)
1284 struct bonding
*bond
= netdev_priv(bond_dev
);
1286 read_lock(&bond
->lock
);
1287 __bond_netpoll_cleanup(bond
);
1288 read_unlock(&bond
->lock
);
1291 static int bond_netpoll_setup(struct net_device
*dev
, struct netpoll_info
*ni
)
1293 struct bonding
*bond
= netdev_priv(dev
);
1294 struct slave
*slave
;
1297 read_lock(&bond
->lock
);
1298 bond_for_each_slave(bond
, slave
, i
) {
1299 err
= slave_enable_netpoll(slave
);
1301 __bond_netpoll_cleanup(bond
);
1305 read_unlock(&bond
->lock
);
1309 static struct netpoll_info
*bond_netpoll_info(struct bonding
*bond
)
1311 return bond
->dev
->npinfo
;
1315 static inline int slave_enable_netpoll(struct slave
*slave
)
1319 static inline void slave_disable_netpoll(struct slave
*slave
)
1322 static void bond_netpoll_cleanup(struct net_device
*bond_dev
)
1327 /*---------------------------------- IOCTL ----------------------------------*/
1329 static int bond_sethwaddr(struct net_device
*bond_dev
,
1330 struct net_device
*slave_dev
)
1332 pr_debug("bond_dev=%p\n", bond_dev
);
1333 pr_debug("slave_dev=%p\n", slave_dev
);
1334 pr_debug("slave_dev->addr_len=%d\n", slave_dev
->addr_len
);
1335 memcpy(bond_dev
->dev_addr
, slave_dev
->dev_addr
, slave_dev
->addr_len
);
1339 static netdev_features_t
bond_fix_features(struct net_device
*dev
,
1340 netdev_features_t features
)
1342 struct slave
*slave
;
1343 struct bonding
*bond
= netdev_priv(dev
);
1344 netdev_features_t mask
;
1347 read_lock(&bond
->lock
);
1349 if (!bond
->first_slave
) {
1350 /* Disable adding VLANs to empty bond. But why? --mq */
1351 features
|= NETIF_F_VLAN_CHALLENGED
;
1356 features
&= ~NETIF_F_ONE_FOR_ALL
;
1357 features
|= NETIF_F_ALL_FOR_ALL
;
1359 bond_for_each_slave(bond
, slave
, i
) {
1360 features
= netdev_increment_features(features
,
1361 slave
->dev
->features
,
1366 read_unlock(&bond
->lock
);
1370 #define BOND_VLAN_FEATURES (NETIF_F_ALL_CSUM | NETIF_F_SG | \
1371 NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
1372 NETIF_F_HIGHDMA | NETIF_F_LRO)
1374 static void bond_compute_features(struct bonding
*bond
)
1376 struct slave
*slave
;
1377 struct net_device
*bond_dev
= bond
->dev
;
1378 netdev_features_t vlan_features
= BOND_VLAN_FEATURES
;
1379 unsigned short max_hard_header_len
= ETH_HLEN
;
1382 read_lock(&bond
->lock
);
1384 if (!bond
->first_slave
)
1387 bond_for_each_slave(bond
, slave
, i
) {
1388 vlan_features
= netdev_increment_features(vlan_features
,
1389 slave
->dev
->vlan_features
, BOND_VLAN_FEATURES
);
1391 if (slave
->dev
->hard_header_len
> max_hard_header_len
)
1392 max_hard_header_len
= slave
->dev
->hard_header_len
;
1396 bond_dev
->vlan_features
= vlan_features
;
1397 bond_dev
->hard_header_len
= max_hard_header_len
;
1399 read_unlock(&bond
->lock
);
1401 netdev_change_features(bond_dev
);
1404 static void bond_setup_by_slave(struct net_device
*bond_dev
,
1405 struct net_device
*slave_dev
)
1407 struct bonding
*bond
= netdev_priv(bond_dev
);
1409 bond_dev
->header_ops
= slave_dev
->header_ops
;
1411 bond_dev
->type
= slave_dev
->type
;
1412 bond_dev
->hard_header_len
= slave_dev
->hard_header_len
;
1413 bond_dev
->addr_len
= slave_dev
->addr_len
;
1415 memcpy(bond_dev
->broadcast
, slave_dev
->broadcast
,
1416 slave_dev
->addr_len
);
1417 bond
->setup_by_slave
= 1;
1420 /* On bonding slaves other than the currently active slave, suppress
1421 * duplicates except for alb non-mcast/bcast.
1423 static bool bond_should_deliver_exact_match(struct sk_buff
*skb
,
1424 struct slave
*slave
,
1425 struct bonding
*bond
)
1427 if (bond_is_slave_inactive(slave
)) {
1428 if (bond
->params
.mode
== BOND_MODE_ALB
&&
1429 skb
->pkt_type
!= PACKET_BROADCAST
&&
1430 skb
->pkt_type
!= PACKET_MULTICAST
)
1437 static rx_handler_result_t
bond_handle_frame(struct sk_buff
**pskb
)
1439 struct sk_buff
*skb
= *pskb
;
1440 struct slave
*slave
;
1441 struct bonding
*bond
;
1442 void (*recv_probe
)(struct sk_buff
*, struct bonding
*,
1445 skb
= skb_share_check(skb
, GFP_ATOMIC
);
1447 return RX_HANDLER_CONSUMED
;
1451 slave
= bond_slave_get_rcu(skb
->dev
);
1454 if (bond
->params
.arp_interval
)
1455 slave
->dev
->last_rx
= jiffies
;
1457 recv_probe
= ACCESS_ONCE(bond
->recv_probe
);
1459 struct sk_buff
*nskb
= skb_clone(skb
, GFP_ATOMIC
);
1462 recv_probe(nskb
, bond
, slave
);
1463 dev_kfree_skb(nskb
);
1467 if (bond_should_deliver_exact_match(skb
, slave
, bond
)) {
1468 return RX_HANDLER_EXACT
;
1471 skb
->dev
= bond
->dev
;
1473 if (bond
->params
.mode
== BOND_MODE_ALB
&&
1474 bond
->dev
->priv_flags
& IFF_BRIDGE_PORT
&&
1475 skb
->pkt_type
== PACKET_HOST
) {
1477 if (unlikely(skb_cow_head(skb
,
1478 skb
->data
- skb_mac_header(skb
)))) {
1480 return RX_HANDLER_CONSUMED
;
1482 memcpy(eth_hdr(skb
)->h_dest
, bond
->dev
->dev_addr
, ETH_ALEN
);
1485 return RX_HANDLER_ANOTHER
;
1488 /* enslave device <slave> to bond device <master> */
1489 int bond_enslave(struct net_device
*bond_dev
, struct net_device
*slave_dev
)
1491 struct bonding
*bond
= netdev_priv(bond_dev
);
1492 const struct net_device_ops
*slave_ops
= slave_dev
->netdev_ops
;
1493 struct slave
*new_slave
= NULL
;
1494 struct netdev_hw_addr
*ha
;
1495 struct sockaddr addr
;
1499 if (!bond
->params
.use_carrier
&& slave_dev
->ethtool_ops
== NULL
&&
1500 slave_ops
->ndo_do_ioctl
== NULL
) {
1501 pr_warning("%s: Warning: no link monitoring support for %s\n",
1502 bond_dev
->name
, slave_dev
->name
);
1505 /* already enslaved */
1506 if (slave_dev
->flags
& IFF_SLAVE
) {
1507 pr_debug("Error, Device was already enslaved\n");
1511 /* vlan challenged mutual exclusion */
1512 /* no need to lock since we're protected by rtnl_lock */
1513 if (slave_dev
->features
& NETIF_F_VLAN_CHALLENGED
) {
1514 pr_debug("%s: NETIF_F_VLAN_CHALLENGED\n", slave_dev
->name
);
1515 if (bond_vlan_used(bond
)) {
1516 pr_err("%s: Error: cannot enslave VLAN challenged slave %s on VLAN enabled bond %s\n",
1517 bond_dev
->name
, slave_dev
->name
, bond_dev
->name
);
1520 pr_warning("%s: Warning: enslaved VLAN challenged slave %s. Adding VLANs will be blocked as long as %s is part of bond %s\n",
1521 bond_dev
->name
, slave_dev
->name
,
1522 slave_dev
->name
, bond_dev
->name
);
1525 pr_debug("%s: ! NETIF_F_VLAN_CHALLENGED\n", slave_dev
->name
);
1529 * Old ifenslave binaries are no longer supported. These can
1530 * be identified with moderate accuracy by the state of the slave:
1531 * the current ifenslave will set the interface down prior to
1532 * enslaving it; the old ifenslave will not.
1534 if ((slave_dev
->flags
& IFF_UP
)) {
1535 pr_err("%s is up. This may be due to an out of date ifenslave.\n",
1538 goto err_undo_flags
;
1541 /* set bonding device ether type by slave - bonding netdevices are
1542 * created with ether_setup, so when the slave type is not ARPHRD_ETHER
1543 * there is a need to override some of the type dependent attribs/funcs.
1545 * bond ether type mutual exclusion - don't allow slaves of dissimilar
1546 * ether type (eg ARPHRD_ETHER and ARPHRD_INFINIBAND) share the same bond
1548 if (bond
->slave_cnt
== 0) {
1549 if (bond_dev
->type
!= slave_dev
->type
) {
1550 pr_debug("%s: change device type from %d to %d\n",
1552 bond_dev
->type
, slave_dev
->type
);
1554 res
= netdev_bonding_change(bond_dev
,
1555 NETDEV_PRE_TYPE_CHANGE
);
1556 res
= notifier_to_errno(res
);
1558 pr_err("%s: refused to change device type\n",
1561 goto err_undo_flags
;
1564 /* Flush unicast and multicast addresses */
1565 dev_uc_flush(bond_dev
);
1566 dev_mc_flush(bond_dev
);
1568 if (slave_dev
->type
!= ARPHRD_ETHER
)
1569 bond_setup_by_slave(bond_dev
, slave_dev
);
1571 ether_setup(bond_dev
);
1572 bond_dev
->priv_flags
&= ~IFF_TX_SKB_SHARING
;
1575 netdev_bonding_change(bond_dev
,
1576 NETDEV_POST_TYPE_CHANGE
);
1578 } else if (bond_dev
->type
!= slave_dev
->type
) {
1579 pr_err("%s ether type (%d) is different from other slaves (%d), can not enslave it.\n",
1581 slave_dev
->type
, bond_dev
->type
);
1583 goto err_undo_flags
;
1586 if (slave_ops
->ndo_set_mac_address
== NULL
) {
1587 if (bond
->slave_cnt
== 0) {
1588 pr_warning("%s: Warning: The first slave device specified does not support setting the MAC address. Setting fail_over_mac to active.",
1590 bond
->params
.fail_over_mac
= BOND_FOM_ACTIVE
;
1591 } else if (bond
->params
.fail_over_mac
!= BOND_FOM_ACTIVE
) {
1592 pr_err("%s: Error: The slave device specified does not support setting the MAC address, but fail_over_mac is not set to active.\n",
1595 goto err_undo_flags
;
1599 call_netdevice_notifiers(NETDEV_JOIN
, slave_dev
);
1601 /* If this is the first slave, then we need to set the master's hardware
1602 * address to be the same as the slave's. */
1603 if (is_zero_ether_addr(bond
->dev
->dev_addr
))
1604 memcpy(bond
->dev
->dev_addr
, slave_dev
->dev_addr
,
1605 slave_dev
->addr_len
);
1608 new_slave
= kzalloc(sizeof(struct slave
), GFP_KERNEL
);
1611 goto err_undo_flags
;
1615 * Set the new_slave's queue_id to be zero. Queue ID mapping
1616 * is set via sysfs or module option if desired.
1618 new_slave
->queue_id
= 0;
1620 /* Save slave's original mtu and then set it to match the bond */
1621 new_slave
->original_mtu
= slave_dev
->mtu
;
1622 res
= dev_set_mtu(slave_dev
, bond
->dev
->mtu
);
1624 pr_debug("Error %d calling dev_set_mtu\n", res
);
1629 * Save slave's original ("permanent") mac address for modes
1630 * that need it, and for restoring it upon release, and then
1631 * set it to the master's address
1633 memcpy(new_slave
->perm_hwaddr
, slave_dev
->dev_addr
, ETH_ALEN
);
1635 if (!bond
->params
.fail_over_mac
) {
1637 * Set slave to master's mac address. The application already
1638 * set the master's mac address to that of the first slave
1640 memcpy(addr
.sa_data
, bond_dev
->dev_addr
, bond_dev
->addr_len
);
1641 addr
.sa_family
= slave_dev
->type
;
1642 res
= dev_set_mac_address(slave_dev
, &addr
);
1644 pr_debug("Error %d calling set_mac_address\n", res
);
1645 goto err_restore_mtu
;
1649 res
= netdev_set_bond_master(slave_dev
, bond_dev
);
1651 pr_debug("Error %d calling netdev_set_bond_master\n", res
);
1652 goto err_restore_mac
;
1655 /* open the slave since the application closed it */
1656 res
= dev_open(slave_dev
);
1658 pr_debug("Opening slave %s failed\n", slave_dev
->name
);
1659 goto err_unset_master
;
1662 new_slave
->bond
= bond
;
1663 new_slave
->dev
= slave_dev
;
1664 slave_dev
->priv_flags
|= IFF_BONDING
;
1666 if (bond_is_lb(bond
)) {
1667 /* bond_alb_init_slave() must be called before all other stages since
1668 * it might fail and we do not want to have to undo everything
1670 res
= bond_alb_init_slave(bond
, new_slave
);
1675 /* If the mode USES_PRIMARY, then the new slave gets the
1676 * master's promisc (and mc) settings only if it becomes the
1677 * curr_active_slave, and that is taken care of later when calling
1678 * bond_change_active()
1680 if (!USES_PRIMARY(bond
->params
.mode
)) {
1681 /* set promiscuity level to new slave */
1682 if (bond_dev
->flags
& IFF_PROMISC
) {
1683 res
= dev_set_promiscuity(slave_dev
, 1);
1688 /* set allmulti level to new slave */
1689 if (bond_dev
->flags
& IFF_ALLMULTI
) {
1690 res
= dev_set_allmulti(slave_dev
, 1);
1695 netif_addr_lock_bh(bond_dev
);
1696 /* upload master's mc_list to new slave */
1697 netdev_for_each_mc_addr(ha
, bond_dev
)
1698 dev_mc_add(slave_dev
, ha
->addr
);
1699 netif_addr_unlock_bh(bond_dev
);
1702 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
1703 /* add lacpdu mc addr to mc list */
1704 u8 lacpdu_multicast
[ETH_ALEN
] = MULTICAST_LACPDU_ADDR
;
1706 dev_mc_add(slave_dev
, lacpdu_multicast
);
1709 bond_add_vlans_on_slave(bond
, slave_dev
);
1711 write_lock_bh(&bond
->lock
);
1713 bond_attach_slave(bond
, new_slave
);
1715 new_slave
->delay
= 0;
1716 new_slave
->link_failure_count
= 0;
1718 write_unlock_bh(&bond
->lock
);
1720 bond_compute_features(bond
);
1722 read_lock(&bond
->lock
);
1724 new_slave
->last_arp_rx
= jiffies
;
1726 if (bond
->params
.miimon
&& !bond
->params
.use_carrier
) {
1727 link_reporting
= bond_check_dev_link(bond
, slave_dev
, 1);
1729 if ((link_reporting
== -1) && !bond
->params
.arp_interval
) {
1731 * miimon is set but a bonded network driver
1732 * does not support ETHTOOL/MII and
1733 * arp_interval is not set. Note: if
1734 * use_carrier is enabled, we will never go
1735 * here (because netif_carrier is always
1736 * supported); thus, we don't need to change
1737 * the messages for netif_carrier.
1739 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",
1740 bond_dev
->name
, slave_dev
->name
);
1741 } else if (link_reporting
== -1) {
1742 /* unable get link status using mii/ethtool */
1743 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",
1744 bond_dev
->name
, slave_dev
->name
);
1748 /* check for initial state */
1749 if (!bond
->params
.miimon
||
1750 (bond_check_dev_link(bond
, slave_dev
, 0) == BMSR_LSTATUS
)) {
1751 if (bond
->params
.updelay
) {
1752 pr_debug("Initial state of slave_dev is BOND_LINK_BACK\n");
1753 new_slave
->link
= BOND_LINK_BACK
;
1754 new_slave
->delay
= bond
->params
.updelay
;
1756 pr_debug("Initial state of slave_dev is BOND_LINK_UP\n");
1757 new_slave
->link
= BOND_LINK_UP
;
1759 new_slave
->jiffies
= jiffies
;
1761 pr_debug("Initial state of slave_dev is BOND_LINK_DOWN\n");
1762 new_slave
->link
= BOND_LINK_DOWN
;
1765 bond_update_speed_duplex(new_slave
);
1767 if (USES_PRIMARY(bond
->params
.mode
) && bond
->params
.primary
[0]) {
1768 /* if there is a primary slave, remember it */
1769 if (strcmp(bond
->params
.primary
, new_slave
->dev
->name
) == 0) {
1770 bond
->primary_slave
= new_slave
;
1771 bond
->force_primary
= true;
1775 write_lock_bh(&bond
->curr_slave_lock
);
1777 switch (bond
->params
.mode
) {
1778 case BOND_MODE_ACTIVEBACKUP
:
1779 bond_set_slave_inactive_flags(new_slave
);
1780 bond_select_active_slave(bond
);
1782 case BOND_MODE_8023AD
:
1783 /* in 802.3ad mode, the internal mechanism
1784 * will activate the slaves in the selected
1787 bond_set_slave_inactive_flags(new_slave
);
1788 /* if this is the first slave */
1789 if (bond
->slave_cnt
== 1) {
1790 SLAVE_AD_INFO(new_slave
).id
= 1;
1791 /* Initialize AD with the number of times that the AD timer is called in 1 second
1792 * can be called only after the mac address of the bond is set
1794 bond_3ad_initialize(bond
, 1000/AD_TIMER_INTERVAL
);
1796 SLAVE_AD_INFO(new_slave
).id
=
1797 SLAVE_AD_INFO(new_slave
->prev
).id
+ 1;
1800 bond_3ad_bind_slave(new_slave
);
1804 bond_set_active_slave(new_slave
);
1805 bond_set_slave_inactive_flags(new_slave
);
1806 bond_select_active_slave(bond
);
1809 pr_debug("This slave is always active in trunk mode\n");
1811 /* always active in trunk mode */
1812 bond_set_active_slave(new_slave
);
1814 /* In trunking mode there is little meaning to curr_active_slave
1815 * anyway (it holds no special properties of the bond device),
1816 * so we can change it without calling change_active_interface()
1818 if (!bond
->curr_active_slave
)
1819 bond
->curr_active_slave
= new_slave
;
1822 } /* switch(bond_mode) */
1824 write_unlock_bh(&bond
->curr_slave_lock
);
1826 bond_set_carrier(bond
);
1828 #ifdef CONFIG_NET_POLL_CONTROLLER
1829 slave_dev
->npinfo
= bond_netpoll_info(bond
);
1830 if (slave_dev
->npinfo
) {
1831 if (slave_enable_netpoll(new_slave
)) {
1832 read_unlock(&bond
->lock
);
1833 pr_info("Error, %s: master_dev is using netpoll, "
1834 "but new slave device does not support netpoll.\n",
1842 read_unlock(&bond
->lock
);
1844 res
= bond_create_slave_symlinks(bond_dev
, slave_dev
);
1848 res
= netdev_rx_handler_register(slave_dev
, bond_handle_frame
,
1851 pr_debug("Error %d calling netdev_rx_handler_register\n", res
);
1852 goto err_dest_symlinks
;
1855 pr_info("%s: enslaving %s as a%s interface with a%s link.\n",
1856 bond_dev
->name
, slave_dev
->name
,
1857 bond_is_active_slave(new_slave
) ? "n active" : " backup",
1858 new_slave
->link
!= BOND_LINK_DOWN
? "n up" : " down");
1860 /* enslave is successful */
1863 /* Undo stages on error */
1865 bond_destroy_slave_symlinks(bond_dev
, slave_dev
);
1868 write_lock_bh(&bond
->lock
);
1869 bond_detach_slave(bond
, new_slave
);
1870 write_unlock_bh(&bond
->lock
);
1873 dev_close(slave_dev
);
1876 netdev_set_bond_master(slave_dev
, NULL
);
1879 if (!bond
->params
.fail_over_mac
) {
1880 /* XXX TODO - fom follow mode needs to change master's
1881 * MAC if this slave's MAC is in use by the bond, or at
1882 * least print a warning.
1884 memcpy(addr
.sa_data
, new_slave
->perm_hwaddr
, ETH_ALEN
);
1885 addr
.sa_family
= slave_dev
->type
;
1886 dev_set_mac_address(slave_dev
, &addr
);
1890 dev_set_mtu(slave_dev
, new_slave
->original_mtu
);
1896 bond_compute_features(bond
);
1902 * Try to release the slave device <slave> from the bond device <master>
1903 * It is legal to access curr_active_slave without a lock because all the function
1906 * The rules for slave state should be:
1907 * for Active/Backup:
1908 * Active stays on all backups go down
1909 * for Bonded connections:
1910 * The first up interface should be left on and all others downed.
1912 int bond_release(struct net_device
*bond_dev
, struct net_device
*slave_dev
)
1914 struct bonding
*bond
= netdev_priv(bond_dev
);
1915 struct slave
*slave
, *oldcurrent
;
1916 struct sockaddr addr
;
1917 netdev_features_t old_features
= bond_dev
->features
;
1919 /* slave is not a slave or master is not master of this slave */
1920 if (!(slave_dev
->flags
& IFF_SLAVE
) ||
1921 (slave_dev
->master
!= bond_dev
)) {
1922 pr_err("%s: Error: cannot release %s.\n",
1923 bond_dev
->name
, slave_dev
->name
);
1928 netdev_bonding_change(bond_dev
, NETDEV_RELEASE
);
1929 write_lock_bh(&bond
->lock
);
1931 slave
= bond_get_slave_by_dev(bond
, slave_dev
);
1933 /* not a slave of this bond */
1934 pr_info("%s: %s not enslaved\n",
1935 bond_dev
->name
, slave_dev
->name
);
1936 write_unlock_bh(&bond
->lock
);
1937 unblock_netpoll_tx();
1941 /* unregister rx_handler early so bond_handle_frame wouldn't be called
1942 * for this slave anymore.
1944 netdev_rx_handler_unregister(slave_dev
);
1945 write_unlock_bh(&bond
->lock
);
1947 write_lock_bh(&bond
->lock
);
1949 if (!bond
->params
.fail_over_mac
) {
1950 if (!compare_ether_addr(bond_dev
->dev_addr
, slave
->perm_hwaddr
) &&
1951 bond
->slave_cnt
> 1)
1952 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",
1953 bond_dev
->name
, slave_dev
->name
,
1955 bond_dev
->name
, slave_dev
->name
);
1958 /* Inform AD package of unbinding of slave. */
1959 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
1960 /* must be called before the slave is
1961 * detached from the list
1963 bond_3ad_unbind_slave(slave
);
1966 pr_info("%s: releasing %s interface %s\n",
1968 bond_is_active_slave(slave
) ? "active" : "backup",
1971 oldcurrent
= bond
->curr_active_slave
;
1973 bond
->current_arp_slave
= NULL
;
1975 /* release the slave from its bond */
1976 bond_detach_slave(bond
, slave
);
1978 if (bond
->primary_slave
== slave
)
1979 bond
->primary_slave
= NULL
;
1981 if (oldcurrent
== slave
)
1982 bond_change_active_slave(bond
, NULL
);
1984 if (bond_is_lb(bond
)) {
1985 /* Must be called only after the slave has been
1986 * detached from the list and the curr_active_slave
1987 * has been cleared (if our_slave == old_current),
1988 * but before a new active slave is selected.
1990 write_unlock_bh(&bond
->lock
);
1991 bond_alb_deinit_slave(bond
, slave
);
1992 write_lock_bh(&bond
->lock
);
1995 if (oldcurrent
== slave
) {
1997 * Note that we hold RTNL over this sequence, so there
1998 * is no concern that another slave add/remove event
2001 write_unlock_bh(&bond
->lock
);
2002 read_lock(&bond
->lock
);
2003 write_lock_bh(&bond
->curr_slave_lock
);
2005 bond_select_active_slave(bond
);
2007 write_unlock_bh(&bond
->curr_slave_lock
);
2008 read_unlock(&bond
->lock
);
2009 write_lock_bh(&bond
->lock
);
2012 if (bond
->slave_cnt
== 0) {
2013 bond_set_carrier(bond
);
2015 /* if the last slave was removed, zero the mac address
2016 * of the master so it will be set by the application
2017 * to the mac address of the first slave
2019 memset(bond_dev
->dev_addr
, 0, bond_dev
->addr_len
);
2021 if (bond_vlan_used(bond
)) {
2022 pr_warning("%s: Warning: clearing HW address of %s while it still has VLANs.\n",
2023 bond_dev
->name
, bond_dev
->name
);
2024 pr_warning("%s: When re-adding slaves, make sure the bond's HW address matches its VLANs'.\n",
2029 write_unlock_bh(&bond
->lock
);
2030 unblock_netpoll_tx();
2032 bond_compute_features(bond
);
2033 if (!(bond_dev
->features
& NETIF_F_VLAN_CHALLENGED
) &&
2034 (old_features
& NETIF_F_VLAN_CHALLENGED
))
2035 pr_info("%s: last VLAN challenged slave %s left bond %s. VLAN blocking is removed\n",
2036 bond_dev
->name
, slave_dev
->name
, bond_dev
->name
);
2038 /* must do this from outside any spinlocks */
2039 bond_destroy_slave_symlinks(bond_dev
, slave_dev
);
2041 bond_del_vlans_from_slave(bond
, slave_dev
);
2043 /* If the mode USES_PRIMARY, then we should only remove its
2044 * promisc and mc settings if it was the curr_active_slave, but that was
2045 * already taken care of above when we detached the slave
2047 if (!USES_PRIMARY(bond
->params
.mode
)) {
2048 /* unset promiscuity level from slave */
2049 if (bond_dev
->flags
& IFF_PROMISC
)
2050 dev_set_promiscuity(slave_dev
, -1);
2052 /* unset allmulti level from slave */
2053 if (bond_dev
->flags
& IFF_ALLMULTI
)
2054 dev_set_allmulti(slave_dev
, -1);
2056 /* flush master's mc_list from slave */
2057 netif_addr_lock_bh(bond_dev
);
2058 bond_mc_list_flush(bond_dev
, slave_dev
);
2059 netif_addr_unlock_bh(bond_dev
);
2062 netdev_set_bond_master(slave_dev
, NULL
);
2064 slave_disable_netpoll(slave
);
2066 /* close slave before restoring its mac address */
2067 dev_close(slave_dev
);
2069 if (bond
->params
.fail_over_mac
!= BOND_FOM_ACTIVE
) {
2070 /* restore original ("permanent") mac address */
2071 memcpy(addr
.sa_data
, slave
->perm_hwaddr
, ETH_ALEN
);
2072 addr
.sa_family
= slave_dev
->type
;
2073 dev_set_mac_address(slave_dev
, &addr
);
2076 dev_set_mtu(slave_dev
, slave
->original_mtu
);
2078 slave_dev
->priv_flags
&= ~IFF_BONDING
;
2082 return 0; /* deletion OK */
2086 * First release a slave and then destroy the bond if no more slaves are left.
2087 * Must be under rtnl_lock when this function is called.
2089 static int bond_release_and_destroy(struct net_device
*bond_dev
,
2090 struct net_device
*slave_dev
)
2092 struct bonding
*bond
= netdev_priv(bond_dev
);
2095 ret
= bond_release(bond_dev
, slave_dev
);
2096 if ((ret
== 0) && (bond
->slave_cnt
== 0)) {
2097 bond_dev
->priv_flags
|= IFF_DISABLE_NETPOLL
;
2098 pr_info("%s: destroying bond %s.\n",
2099 bond_dev
->name
, bond_dev
->name
);
2100 unregister_netdevice(bond_dev
);
2106 * This function releases all slaves.
2108 static int bond_release_all(struct net_device
*bond_dev
)
2110 struct bonding
*bond
= netdev_priv(bond_dev
);
2111 struct slave
*slave
;
2112 struct net_device
*slave_dev
;
2113 struct sockaddr addr
;
2115 write_lock_bh(&bond
->lock
);
2117 netif_carrier_off(bond_dev
);
2119 if (bond
->slave_cnt
== 0)
2122 bond
->current_arp_slave
= NULL
;
2123 bond
->primary_slave
= NULL
;
2124 bond_change_active_slave(bond
, NULL
);
2126 while ((slave
= bond
->first_slave
) != NULL
) {
2127 /* Inform AD package of unbinding of slave
2128 * before slave is detached from the list.
2130 if (bond
->params
.mode
== BOND_MODE_8023AD
)
2131 bond_3ad_unbind_slave(slave
);
2133 slave_dev
= slave
->dev
;
2134 bond_detach_slave(bond
, slave
);
2136 /* now that the slave is detached, unlock and perform
2137 * all the undo steps that should not be called from
2140 write_unlock_bh(&bond
->lock
);
2142 /* unregister rx_handler early so bond_handle_frame wouldn't
2143 * be called for this slave anymore.
2145 netdev_rx_handler_unregister(slave_dev
);
2148 if (bond_is_lb(bond
)) {
2149 /* must be called only after the slave
2150 * has been detached from the list
2152 bond_alb_deinit_slave(bond
, slave
);
2155 bond_destroy_slave_symlinks(bond_dev
, slave_dev
);
2156 bond_del_vlans_from_slave(bond
, slave_dev
);
2158 /* If the mode USES_PRIMARY, then we should only remove its
2159 * promisc and mc settings if it was the curr_active_slave, but that was
2160 * already taken care of above when we detached the slave
2162 if (!USES_PRIMARY(bond
->params
.mode
)) {
2163 /* unset promiscuity level from slave */
2164 if (bond_dev
->flags
& IFF_PROMISC
)
2165 dev_set_promiscuity(slave_dev
, -1);
2167 /* unset allmulti level from slave */
2168 if (bond_dev
->flags
& IFF_ALLMULTI
)
2169 dev_set_allmulti(slave_dev
, -1);
2171 /* flush master's mc_list from slave */
2172 netif_addr_lock_bh(bond_dev
);
2173 bond_mc_list_flush(bond_dev
, slave_dev
);
2174 netif_addr_unlock_bh(bond_dev
);
2177 netdev_set_bond_master(slave_dev
, NULL
);
2179 slave_disable_netpoll(slave
);
2181 /* close slave before restoring its mac address */
2182 dev_close(slave_dev
);
2184 if (!bond
->params
.fail_over_mac
) {
2185 /* restore original ("permanent") mac address*/
2186 memcpy(addr
.sa_data
, slave
->perm_hwaddr
, ETH_ALEN
);
2187 addr
.sa_family
= slave_dev
->type
;
2188 dev_set_mac_address(slave_dev
, &addr
);
2193 /* re-acquire the lock before getting the next slave */
2194 write_lock_bh(&bond
->lock
);
2197 /* zero the mac address of the master so it will be
2198 * set by the application to the mac address of the
2201 memset(bond_dev
->dev_addr
, 0, bond_dev
->addr_len
);
2203 if (bond_vlan_used(bond
)) {
2204 pr_warning("%s: Warning: clearing HW address of %s while it still has VLANs.\n",
2205 bond_dev
->name
, bond_dev
->name
);
2206 pr_warning("%s: When re-adding slaves, make sure the bond's HW address matches its VLANs'.\n",
2210 pr_info("%s: released all slaves\n", bond_dev
->name
);
2213 write_unlock_bh(&bond
->lock
);
2215 bond_compute_features(bond
);
2221 * This function changes the active slave to slave <slave_dev>.
2222 * It returns -EINVAL in the following cases.
2223 * - <slave_dev> is not found in the list.
2224 * - There is not active slave now.
2225 * - <slave_dev> is already active.
2226 * - The link state of <slave_dev> is not BOND_LINK_UP.
2227 * - <slave_dev> is not running.
2228 * In these cases, this function does nothing.
2229 * In the other cases, current_slave pointer is changed and 0 is returned.
2231 static int bond_ioctl_change_active(struct net_device
*bond_dev
, struct net_device
*slave_dev
)
2233 struct bonding
*bond
= netdev_priv(bond_dev
);
2234 struct slave
*old_active
= NULL
;
2235 struct slave
*new_active
= NULL
;
2238 if (!USES_PRIMARY(bond
->params
.mode
))
2241 /* Verify that master_dev is indeed the master of slave_dev */
2242 if (!(slave_dev
->flags
& IFF_SLAVE
) || (slave_dev
->master
!= bond_dev
))
2245 read_lock(&bond
->lock
);
2247 read_lock(&bond
->curr_slave_lock
);
2248 old_active
= bond
->curr_active_slave
;
2249 read_unlock(&bond
->curr_slave_lock
);
2251 new_active
= bond_get_slave_by_dev(bond
, slave_dev
);
2254 * Changing to the current active: do nothing; return success.
2256 if (new_active
&& (new_active
== old_active
)) {
2257 read_unlock(&bond
->lock
);
2263 (new_active
->link
== BOND_LINK_UP
) &&
2264 IS_UP(new_active
->dev
)) {
2266 write_lock_bh(&bond
->curr_slave_lock
);
2267 bond_change_active_slave(bond
, new_active
);
2268 write_unlock_bh(&bond
->curr_slave_lock
);
2269 unblock_netpoll_tx();
2273 read_unlock(&bond
->lock
);
2278 static int bond_info_query(struct net_device
*bond_dev
, struct ifbond
*info
)
2280 struct bonding
*bond
= netdev_priv(bond_dev
);
2282 info
->bond_mode
= bond
->params
.mode
;
2283 info
->miimon
= bond
->params
.miimon
;
2285 read_lock(&bond
->lock
);
2286 info
->num_slaves
= bond
->slave_cnt
;
2287 read_unlock(&bond
->lock
);
2292 static int bond_slave_info_query(struct net_device
*bond_dev
, struct ifslave
*info
)
2294 struct bonding
*bond
= netdev_priv(bond_dev
);
2295 struct slave
*slave
;
2296 int i
, res
= -ENODEV
;
2298 read_lock(&bond
->lock
);
2300 bond_for_each_slave(bond
, slave
, i
) {
2301 if (i
== (int)info
->slave_id
) {
2303 strcpy(info
->slave_name
, slave
->dev
->name
);
2304 info
->link
= slave
->link
;
2305 info
->state
= bond_slave_state(slave
);
2306 info
->link_failure_count
= slave
->link_failure_count
;
2311 read_unlock(&bond
->lock
);
2316 /*-------------------------------- Monitoring -------------------------------*/
2319 static int bond_miimon_inspect(struct bonding
*bond
)
2321 struct slave
*slave
;
2322 int i
, link_state
, commit
= 0;
2323 bool ignore_updelay
;
2325 ignore_updelay
= !bond
->curr_active_slave
? true : false;
2327 bond_for_each_slave(bond
, slave
, i
) {
2328 slave
->new_link
= BOND_LINK_NOCHANGE
;
2330 link_state
= bond_check_dev_link(bond
, slave
->dev
, 0);
2332 switch (slave
->link
) {
2337 slave
->link
= BOND_LINK_FAIL
;
2338 slave
->delay
= bond
->params
.downdelay
;
2340 pr_info("%s: link status down for %sinterface %s, disabling it in %d ms.\n",
2342 (bond
->params
.mode
==
2343 BOND_MODE_ACTIVEBACKUP
) ?
2344 (bond_is_active_slave(slave
) ?
2345 "active " : "backup ") : "",
2347 bond
->params
.downdelay
* bond
->params
.miimon
);
2350 case BOND_LINK_FAIL
:
2353 * recovered before downdelay expired
2355 slave
->link
= BOND_LINK_UP
;
2356 slave
->jiffies
= jiffies
;
2357 pr_info("%s: link status up again after %d ms for interface %s.\n",
2359 (bond
->params
.downdelay
- slave
->delay
) *
2360 bond
->params
.miimon
,
2365 if (slave
->delay
<= 0) {
2366 slave
->new_link
= BOND_LINK_DOWN
;
2374 case BOND_LINK_DOWN
:
2378 slave
->link
= BOND_LINK_BACK
;
2379 slave
->delay
= bond
->params
.updelay
;
2382 pr_info("%s: link status up for interface %s, enabling it in %d ms.\n",
2383 bond
->dev
->name
, slave
->dev
->name
,
2384 ignore_updelay
? 0 :
2385 bond
->params
.updelay
*
2386 bond
->params
.miimon
);
2389 case BOND_LINK_BACK
:
2391 slave
->link
= BOND_LINK_DOWN
;
2392 pr_info("%s: link status down again after %d ms for interface %s.\n",
2394 (bond
->params
.updelay
- slave
->delay
) *
2395 bond
->params
.miimon
,
2404 if (slave
->delay
<= 0) {
2405 slave
->new_link
= BOND_LINK_UP
;
2407 ignore_updelay
= false;
2419 static void bond_miimon_commit(struct bonding
*bond
)
2421 struct slave
*slave
;
2424 bond_for_each_slave(bond
, slave
, i
) {
2425 switch (slave
->new_link
) {
2426 case BOND_LINK_NOCHANGE
:
2430 slave
->link
= BOND_LINK_UP
;
2431 slave
->jiffies
= jiffies
;
2433 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
2434 /* prevent it from being the active one */
2435 bond_set_backup_slave(slave
);
2436 } else if (bond
->params
.mode
!= BOND_MODE_ACTIVEBACKUP
) {
2437 /* make it immediately active */
2438 bond_set_active_slave(slave
);
2439 } else if (slave
!= bond
->primary_slave
) {
2440 /* prevent it from being the active one */
2441 bond_set_backup_slave(slave
);
2444 bond_update_speed_duplex(slave
);
2446 pr_info("%s: link status definitely up for interface %s, %u Mbps %s duplex.\n",
2447 bond
->dev
->name
, slave
->dev
->name
,
2448 slave
->speed
, slave
->duplex
? "full" : "half");
2450 /* notify ad that the link status has changed */
2451 if (bond
->params
.mode
== BOND_MODE_8023AD
)
2452 bond_3ad_handle_link_change(slave
, BOND_LINK_UP
);
2454 if (bond_is_lb(bond
))
2455 bond_alb_handle_link_change(bond
, slave
,
2458 if (!bond
->curr_active_slave
||
2459 (slave
== bond
->primary_slave
))
2464 case BOND_LINK_DOWN
:
2465 if (slave
->link_failure_count
< UINT_MAX
)
2466 slave
->link_failure_count
++;
2468 slave
->link
= BOND_LINK_DOWN
;
2470 if (bond
->params
.mode
== BOND_MODE_ACTIVEBACKUP
||
2471 bond
->params
.mode
== BOND_MODE_8023AD
)
2472 bond_set_slave_inactive_flags(slave
);
2474 pr_info("%s: link status definitely down for interface %s, disabling it\n",
2475 bond
->dev
->name
, slave
->dev
->name
);
2477 if (bond
->params
.mode
== BOND_MODE_8023AD
)
2478 bond_3ad_handle_link_change(slave
,
2481 if (bond_is_lb(bond
))
2482 bond_alb_handle_link_change(bond
, slave
,
2485 if (slave
== bond
->curr_active_slave
)
2491 pr_err("%s: invalid new link %d on slave %s\n",
2492 bond
->dev
->name
, slave
->new_link
,
2494 slave
->new_link
= BOND_LINK_NOCHANGE
;
2502 write_lock_bh(&bond
->curr_slave_lock
);
2503 bond_select_active_slave(bond
);
2504 write_unlock_bh(&bond
->curr_slave_lock
);
2505 unblock_netpoll_tx();
2508 bond_set_carrier(bond
);
2514 * Really a wrapper that splits the mii monitor into two phases: an
2515 * inspection, then (if inspection indicates something needs to be done)
2516 * an acquisition of appropriate locks followed by a commit phase to
2517 * implement whatever link state changes are indicated.
2519 void bond_mii_monitor(struct work_struct
*work
)
2521 struct bonding
*bond
= container_of(work
, struct bonding
,
2523 bool should_notify_peers
= false;
2524 unsigned long delay
;
2526 read_lock(&bond
->lock
);
2528 delay
= msecs_to_jiffies(bond
->params
.miimon
);
2530 if (bond
->slave_cnt
== 0)
2533 should_notify_peers
= bond_should_notify_peers(bond
);
2535 if (bond_miimon_inspect(bond
)) {
2536 read_unlock(&bond
->lock
);
2538 /* Race avoidance with bond_close cancel of workqueue */
2539 if (!rtnl_trylock()) {
2540 read_lock(&bond
->lock
);
2542 should_notify_peers
= false;
2546 read_lock(&bond
->lock
);
2548 bond_miimon_commit(bond
);
2550 read_unlock(&bond
->lock
);
2551 rtnl_unlock(); /* might sleep, hold no other locks */
2552 read_lock(&bond
->lock
);
2556 if (bond
->params
.miimon
)
2557 queue_delayed_work(bond
->wq
, &bond
->mii_work
, delay
);
2559 read_unlock(&bond
->lock
);
2561 if (should_notify_peers
) {
2562 if (!rtnl_trylock()) {
2563 read_lock(&bond
->lock
);
2564 bond
->send_peer_notif
++;
2565 read_unlock(&bond
->lock
);
2568 netdev_bonding_change(bond
->dev
, NETDEV_NOTIFY_PEERS
);
2573 static int bond_has_this_ip(struct bonding
*bond
, __be32 ip
)
2575 struct vlan_entry
*vlan
;
2577 if (ip
== bond
->master_ip
)
2580 list_for_each_entry(vlan
, &bond
->vlan_list
, vlan_list
) {
2581 if (ip
== vlan
->vlan_ip
)
2589 * We go to the (large) trouble of VLAN tagging ARP frames because
2590 * switches in VLAN mode (especially if ports are configured as
2591 * "native" to a VLAN) might not pass non-tagged frames.
2593 static void bond_arp_send(struct net_device
*slave_dev
, int arp_op
, __be32 dest_ip
, __be32 src_ip
, unsigned short vlan_id
)
2595 struct sk_buff
*skb
;
2597 pr_debug("arp %d on slave %s: dst %x src %x vid %d\n", arp_op
,
2598 slave_dev
->name
, dest_ip
, src_ip
, vlan_id
);
2600 skb
= arp_create(arp_op
, ETH_P_ARP
, dest_ip
, slave_dev
, src_ip
,
2601 NULL
, slave_dev
->dev_addr
, NULL
);
2604 pr_err("ARP packet allocation failed\n");
2608 skb
= vlan_put_tag(skb
, vlan_id
);
2610 pr_err("failed to insert VLAN tag\n");
2618 static void bond_arp_send_all(struct bonding
*bond
, struct slave
*slave
)
2621 __be32
*targets
= bond
->params
.arp_targets
;
2622 struct vlan_entry
*vlan
;
2623 struct net_device
*vlan_dev
;
2626 for (i
= 0; (i
< BOND_MAX_ARP_TARGETS
); i
++) {
2629 pr_debug("basa: target %x\n", targets
[i
]);
2630 if (!bond_vlan_used(bond
)) {
2631 pr_debug("basa: empty vlan: arp_send\n");
2632 bond_arp_send(slave
->dev
, ARPOP_REQUEST
, targets
[i
],
2633 bond
->master_ip
, 0);
2638 * If VLANs are configured, we do a route lookup to
2639 * determine which VLAN interface would be used, so we
2640 * can tag the ARP with the proper VLAN tag.
2642 rt
= ip_route_output(dev_net(bond
->dev
), targets
[i
], 0,
2645 if (net_ratelimit()) {
2646 pr_warning("%s: no route to arp_ip_target %pI4\n",
2647 bond
->dev
->name
, &targets
[i
]);
2653 * This target is not on a VLAN
2655 if (rt
->dst
.dev
== bond
->dev
) {
2657 pr_debug("basa: rtdev == bond->dev: arp_send\n");
2658 bond_arp_send(slave
->dev
, ARPOP_REQUEST
, targets
[i
],
2659 bond
->master_ip
, 0);
2664 list_for_each_entry(vlan
, &bond
->vlan_list
, vlan_list
) {
2666 vlan_dev
= __vlan_find_dev_deep(bond
->dev
,
2669 if (vlan_dev
== rt
->dst
.dev
) {
2670 vlan_id
= vlan
->vlan_id
;
2671 pr_debug("basa: vlan match on %s %d\n",
2672 vlan_dev
->name
, vlan_id
);
2679 bond_arp_send(slave
->dev
, ARPOP_REQUEST
, targets
[i
],
2680 vlan
->vlan_ip
, vlan_id
);
2684 if (net_ratelimit()) {
2685 pr_warning("%s: no path to arp_ip_target %pI4 via rt.dev %s\n",
2686 bond
->dev
->name
, &targets
[i
],
2687 rt
->dst
.dev
? rt
->dst
.dev
->name
: "NULL");
2693 static void bond_validate_arp(struct bonding
*bond
, struct slave
*slave
, __be32 sip
, __be32 tip
)
2696 __be32
*targets
= bond
->params
.arp_targets
;
2698 for (i
= 0; (i
< BOND_MAX_ARP_TARGETS
) && targets
[i
]; i
++) {
2699 pr_debug("bva: sip %pI4 tip %pI4 t[%d] %pI4 bhti(tip) %d\n",
2700 &sip
, &tip
, i
, &targets
[i
],
2701 bond_has_this_ip(bond
, tip
));
2702 if (sip
== targets
[i
]) {
2703 if (bond_has_this_ip(bond
, tip
))
2704 slave
->last_arp_rx
= jiffies
;
2710 static void bond_arp_rcv(struct sk_buff
*skb
, struct bonding
*bond
,
2711 struct slave
*slave
)
2714 unsigned char *arp_ptr
;
2717 if (skb
->protocol
!= __cpu_to_be16(ETH_P_ARP
))
2720 read_lock(&bond
->lock
);
2722 pr_debug("bond_arp_rcv: bond %s skb->dev %s\n",
2723 bond
->dev
->name
, skb
->dev
->name
);
2725 if (!pskb_may_pull(skb
, arp_hdr_len(bond
->dev
)))
2729 if (arp
->ar_hln
!= bond
->dev
->addr_len
||
2730 skb
->pkt_type
== PACKET_OTHERHOST
||
2731 skb
->pkt_type
== PACKET_LOOPBACK
||
2732 arp
->ar_hrd
!= htons(ARPHRD_ETHER
) ||
2733 arp
->ar_pro
!= htons(ETH_P_IP
) ||
2737 arp_ptr
= (unsigned char *)(arp
+ 1);
2738 arp_ptr
+= bond
->dev
->addr_len
;
2739 memcpy(&sip
, arp_ptr
, 4);
2740 arp_ptr
+= 4 + bond
->dev
->addr_len
;
2741 memcpy(&tip
, arp_ptr
, 4);
2743 pr_debug("bond_arp_rcv: %s %s/%d av %d sv %d sip %pI4 tip %pI4\n",
2744 bond
->dev
->name
, slave
->dev
->name
, bond_slave_state(slave
),
2745 bond
->params
.arp_validate
, slave_do_arp_validate(bond
, slave
),
2749 * Backup slaves won't see the ARP reply, but do come through
2750 * here for each ARP probe (so we swap the sip/tip to validate
2751 * the probe). In a "redundant switch, common router" type of
2752 * configuration, the ARP probe will (hopefully) travel from
2753 * the active, through one switch, the router, then the other
2754 * switch before reaching the backup.
2756 if (bond_is_active_slave(slave
))
2757 bond_validate_arp(bond
, slave
, sip
, tip
);
2759 bond_validate_arp(bond
, slave
, tip
, sip
);
2762 read_unlock(&bond
->lock
);
2766 * this function is called regularly to monitor each slave's link
2767 * ensuring that traffic is being sent and received when arp monitoring
2768 * is used in load-balancing mode. if the adapter has been dormant, then an
2769 * arp is transmitted to generate traffic. see activebackup_arp_monitor for
2770 * arp monitoring in active backup mode.
2772 void bond_loadbalance_arp_mon(struct work_struct
*work
)
2774 struct bonding
*bond
= container_of(work
, struct bonding
,
2776 struct slave
*slave
, *oldcurrent
;
2777 int do_failover
= 0;
2781 read_lock(&bond
->lock
);
2783 delta_in_ticks
= msecs_to_jiffies(bond
->params
.arp_interval
);
2785 if (bond
->slave_cnt
== 0)
2788 read_lock(&bond
->curr_slave_lock
);
2789 oldcurrent
= bond
->curr_active_slave
;
2790 read_unlock(&bond
->curr_slave_lock
);
2792 /* see if any of the previous devices are up now (i.e. they have
2793 * xmt and rcv traffic). the curr_active_slave does not come into
2794 * the picture unless it is null. also, slave->jiffies is not needed
2795 * here because we send an arp on each slave and give a slave as
2796 * long as it needs to get the tx/rx within the delta.
2797 * TODO: what about up/down delay in arp mode? it wasn't here before
2800 bond_for_each_slave(bond
, slave
, i
) {
2801 unsigned long trans_start
= dev_trans_start(slave
->dev
);
2803 if (slave
->link
!= BOND_LINK_UP
) {
2804 if (time_in_range(jiffies
,
2805 trans_start
- delta_in_ticks
,
2806 trans_start
+ delta_in_ticks
) &&
2807 time_in_range(jiffies
,
2808 slave
->dev
->last_rx
- delta_in_ticks
,
2809 slave
->dev
->last_rx
+ delta_in_ticks
)) {
2811 slave
->link
= BOND_LINK_UP
;
2812 bond_set_active_slave(slave
);
2814 /* primary_slave has no meaning in round-robin
2815 * mode. the window of a slave being up and
2816 * curr_active_slave being null after enslaving
2820 pr_info("%s: link status definitely up for interface %s, ",
2825 pr_info("%s: interface %s is now up\n",
2831 /* slave->link == BOND_LINK_UP */
2833 /* not all switches will respond to an arp request
2834 * when the source ip is 0, so don't take the link down
2835 * if we don't know our ip yet
2837 if (!time_in_range(jiffies
,
2838 trans_start
- delta_in_ticks
,
2839 trans_start
+ 2 * delta_in_ticks
) ||
2840 !time_in_range(jiffies
,
2841 slave
->dev
->last_rx
- delta_in_ticks
,
2842 slave
->dev
->last_rx
+ 2 * delta_in_ticks
)) {
2844 slave
->link
= BOND_LINK_DOWN
;
2845 bond_set_backup_slave(slave
);
2847 if (slave
->link_failure_count
< UINT_MAX
)
2848 slave
->link_failure_count
++;
2850 pr_info("%s: interface %s is now down.\n",
2854 if (slave
== oldcurrent
)
2859 /* note: if switch is in round-robin mode, all links
2860 * must tx arp to ensure all links rx an arp - otherwise
2861 * links may oscillate or not come up at all; if switch is
2862 * in something like xor mode, there is nothing we can
2863 * do - all replies will be rx'ed on same link causing slaves
2864 * to be unstable during low/no traffic periods
2866 if (IS_UP(slave
->dev
))
2867 bond_arp_send_all(bond
, slave
);
2872 write_lock_bh(&bond
->curr_slave_lock
);
2874 bond_select_active_slave(bond
);
2876 write_unlock_bh(&bond
->curr_slave_lock
);
2877 unblock_netpoll_tx();
2881 if (bond
->params
.arp_interval
)
2882 queue_delayed_work(bond
->wq
, &bond
->arp_work
, delta_in_ticks
);
2884 read_unlock(&bond
->lock
);
2888 * Called to inspect slaves for active-backup mode ARP monitor link state
2889 * changes. Sets new_link in slaves to specify what action should take
2890 * place for the slave. Returns 0 if no changes are found, >0 if changes
2891 * to link states must be committed.
2893 * Called with bond->lock held for read.
2895 static int bond_ab_arp_inspect(struct bonding
*bond
, int delta_in_ticks
)
2897 struct slave
*slave
;
2899 unsigned long trans_start
;
2901 bond_for_each_slave(bond
, slave
, i
) {
2902 slave
->new_link
= BOND_LINK_NOCHANGE
;
2904 if (slave
->link
!= BOND_LINK_UP
) {
2905 if (time_in_range(jiffies
,
2906 slave_last_rx(bond
, slave
) - delta_in_ticks
,
2907 slave_last_rx(bond
, slave
) + delta_in_ticks
)) {
2909 slave
->new_link
= BOND_LINK_UP
;
2917 * Give slaves 2*delta after being enslaved or made
2918 * active. This avoids bouncing, as the last receive
2919 * times need a full ARP monitor cycle to be updated.
2921 if (time_in_range(jiffies
,
2922 slave
->jiffies
- delta_in_ticks
,
2923 slave
->jiffies
+ 2 * delta_in_ticks
))
2927 * Backup slave is down if:
2928 * - No current_arp_slave AND
2929 * - more than 3*delta since last receive AND
2930 * - the bond has an IP address
2932 * Note: a non-null current_arp_slave indicates
2933 * the curr_active_slave went down and we are
2934 * searching for a new one; under this condition
2935 * we only take the curr_active_slave down - this
2936 * gives each slave a chance to tx/rx traffic
2937 * before being taken out
2939 if (!bond_is_active_slave(slave
) &&
2940 !bond
->current_arp_slave
&&
2941 !time_in_range(jiffies
,
2942 slave_last_rx(bond
, slave
) - delta_in_ticks
,
2943 slave_last_rx(bond
, slave
) + 3 * delta_in_ticks
)) {
2945 slave
->new_link
= BOND_LINK_DOWN
;
2950 * Active slave is down if:
2951 * - more than 2*delta since transmitting OR
2952 * - (more than 2*delta since receive AND
2953 * the bond has an IP address)
2955 trans_start
= dev_trans_start(slave
->dev
);
2956 if (bond_is_active_slave(slave
) &&
2957 (!time_in_range(jiffies
,
2958 trans_start
- delta_in_ticks
,
2959 trans_start
+ 2 * delta_in_ticks
) ||
2960 !time_in_range(jiffies
,
2961 slave_last_rx(bond
, slave
) - delta_in_ticks
,
2962 slave_last_rx(bond
, slave
) + 2 * delta_in_ticks
))) {
2964 slave
->new_link
= BOND_LINK_DOWN
;
2973 * Called to commit link state changes noted by inspection step of
2974 * active-backup mode ARP monitor.
2976 * Called with RTNL and bond->lock for read.
2978 static void bond_ab_arp_commit(struct bonding
*bond
, int delta_in_ticks
)
2980 struct slave
*slave
;
2982 unsigned long trans_start
;
2984 bond_for_each_slave(bond
, slave
, i
) {
2985 switch (slave
->new_link
) {
2986 case BOND_LINK_NOCHANGE
:
2990 trans_start
= dev_trans_start(slave
->dev
);
2991 if ((!bond
->curr_active_slave
&&
2992 time_in_range(jiffies
,
2993 trans_start
- delta_in_ticks
,
2994 trans_start
+ delta_in_ticks
)) ||
2995 bond
->curr_active_slave
!= slave
) {
2996 slave
->link
= BOND_LINK_UP
;
2997 bond
->current_arp_slave
= NULL
;
2999 pr_info("%s: link status definitely up for interface %s.\n",
3000 bond
->dev
->name
, slave
->dev
->name
);
3002 if (!bond
->curr_active_slave
||
3003 (slave
== bond
->primary_slave
))
3010 case BOND_LINK_DOWN
:
3011 if (slave
->link_failure_count
< UINT_MAX
)
3012 slave
->link_failure_count
++;
3014 slave
->link
= BOND_LINK_DOWN
;
3015 bond_set_slave_inactive_flags(slave
);
3017 pr_info("%s: link status definitely down for interface %s, disabling it\n",
3018 bond
->dev
->name
, slave
->dev
->name
);
3020 if (slave
== bond
->curr_active_slave
) {
3021 bond
->current_arp_slave
= NULL
;
3028 pr_err("%s: impossible: new_link %d on slave %s\n",
3029 bond
->dev
->name
, slave
->new_link
,
3037 write_lock_bh(&bond
->curr_slave_lock
);
3038 bond_select_active_slave(bond
);
3039 write_unlock_bh(&bond
->curr_slave_lock
);
3040 unblock_netpoll_tx();
3043 bond_set_carrier(bond
);
3047 * Send ARP probes for active-backup mode ARP monitor.
3049 * Called with bond->lock held for read.
3051 static void bond_ab_arp_probe(struct bonding
*bond
)
3053 struct slave
*slave
;
3056 read_lock(&bond
->curr_slave_lock
);
3058 if (bond
->current_arp_slave
&& bond
->curr_active_slave
)
3059 pr_info("PROBE: c_arp %s && cas %s BAD\n",
3060 bond
->current_arp_slave
->dev
->name
,
3061 bond
->curr_active_slave
->dev
->name
);
3063 if (bond
->curr_active_slave
) {
3064 bond_arp_send_all(bond
, bond
->curr_active_slave
);
3065 read_unlock(&bond
->curr_slave_lock
);
3069 read_unlock(&bond
->curr_slave_lock
);
3071 /* if we don't have a curr_active_slave, search for the next available
3072 * backup slave from the current_arp_slave and make it the candidate
3073 * for becoming the curr_active_slave
3076 if (!bond
->current_arp_slave
) {
3077 bond
->current_arp_slave
= bond
->first_slave
;
3078 if (!bond
->current_arp_slave
)
3082 bond_set_slave_inactive_flags(bond
->current_arp_slave
);
3084 /* search for next candidate */
3085 bond_for_each_slave_from(bond
, slave
, i
, bond
->current_arp_slave
->next
) {
3086 if (IS_UP(slave
->dev
)) {
3087 slave
->link
= BOND_LINK_BACK
;
3088 bond_set_slave_active_flags(slave
);
3089 bond_arp_send_all(bond
, slave
);
3090 slave
->jiffies
= jiffies
;
3091 bond
->current_arp_slave
= slave
;
3095 /* if the link state is up at this point, we
3096 * mark it down - this can happen if we have
3097 * simultaneous link failures and
3098 * reselect_active_interface doesn't make this
3099 * one the current slave so it is still marked
3100 * up when it is actually down
3102 if (slave
->link
== BOND_LINK_UP
) {
3103 slave
->link
= BOND_LINK_DOWN
;
3104 if (slave
->link_failure_count
< UINT_MAX
)
3105 slave
->link_failure_count
++;
3107 bond_set_slave_inactive_flags(slave
);
3109 pr_info("%s: backup interface %s is now down.\n",
3110 bond
->dev
->name
, slave
->dev
->name
);
3115 void bond_activebackup_arp_mon(struct work_struct
*work
)
3117 struct bonding
*bond
= container_of(work
, struct bonding
,
3119 bool should_notify_peers
= false;
3122 read_lock(&bond
->lock
);
3124 delta_in_ticks
= msecs_to_jiffies(bond
->params
.arp_interval
);
3126 if (bond
->slave_cnt
== 0)
3129 should_notify_peers
= bond_should_notify_peers(bond
);
3131 if (bond_ab_arp_inspect(bond
, delta_in_ticks
)) {
3132 read_unlock(&bond
->lock
);
3134 /* Race avoidance with bond_close flush of workqueue */
3135 if (!rtnl_trylock()) {
3136 read_lock(&bond
->lock
);
3138 should_notify_peers
= false;
3142 read_lock(&bond
->lock
);
3144 bond_ab_arp_commit(bond
, delta_in_ticks
);
3146 read_unlock(&bond
->lock
);
3148 read_lock(&bond
->lock
);
3151 bond_ab_arp_probe(bond
);
3154 if (bond
->params
.arp_interval
)
3155 queue_delayed_work(bond
->wq
, &bond
->arp_work
, delta_in_ticks
);
3157 read_unlock(&bond
->lock
);
3159 if (should_notify_peers
) {
3160 if (!rtnl_trylock()) {
3161 read_lock(&bond
->lock
);
3162 bond
->send_peer_notif
++;
3163 read_unlock(&bond
->lock
);
3166 netdev_bonding_change(bond
->dev
, NETDEV_NOTIFY_PEERS
);
3171 /*-------------------------- netdev event handling --------------------------*/
3174 * Change device name
3176 static int bond_event_changename(struct bonding
*bond
)
3178 bond_remove_proc_entry(bond
);
3179 bond_create_proc_entry(bond
);
3181 bond_debug_reregister(bond
);
3186 static int bond_master_netdev_event(unsigned long event
,
3187 struct net_device
*bond_dev
)
3189 struct bonding
*event_bond
= netdev_priv(bond_dev
);
3192 case NETDEV_CHANGENAME
:
3193 return bond_event_changename(event_bond
);
3201 static int bond_slave_netdev_event(unsigned long event
,
3202 struct net_device
*slave_dev
)
3204 struct net_device
*bond_dev
= slave_dev
->master
;
3205 struct bonding
*bond
= netdev_priv(bond_dev
);
3206 struct slave
*slave
= NULL
;
3209 case NETDEV_UNREGISTER
:
3211 if (bond
->setup_by_slave
)
3212 bond_release_and_destroy(bond_dev
, slave_dev
);
3214 bond_release(bond_dev
, slave_dev
);
3219 slave
= bond_get_slave_by_dev(bond
, slave_dev
);
3221 u32 old_speed
= slave
->speed
;
3222 u8 old_duplex
= slave
->duplex
;
3224 bond_update_speed_duplex(slave
);
3226 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
3227 if (old_speed
!= slave
->speed
)
3228 bond_3ad_adapter_speed_changed(slave
);
3229 if (old_duplex
!= slave
->duplex
)
3230 bond_3ad_adapter_duplex_changed(slave
);
3237 * ... Or is it this?
3240 case NETDEV_CHANGEMTU
:
3242 * TODO: Should slaves be allowed to
3243 * independently alter their MTU? For
3244 * an active-backup bond, slaves need
3245 * not be the same type of device, so
3246 * MTUs may vary. For other modes,
3247 * slaves arguably should have the
3248 * same MTUs. To do this, we'd need to
3249 * take over the slave's change_mtu
3250 * function for the duration of their
3254 case NETDEV_CHANGENAME
:
3256 * TODO: handle changing the primary's name
3259 case NETDEV_FEAT_CHANGE
:
3260 bond_compute_features(bond
);
3270 * bond_netdev_event: handle netdev notifier chain events.
3272 * This function receives events for the netdev chain. The caller (an
3273 * ioctl handler calling blocking_notifier_call_chain) holds the necessary
3274 * locks for us to safely manipulate the slave devices (RTNL lock,
3277 static int bond_netdev_event(struct notifier_block
*this,
3278 unsigned long event
, void *ptr
)
3280 struct net_device
*event_dev
= (struct net_device
*)ptr
;
3282 pr_debug("event_dev: %s, event: %lx\n",
3283 event_dev
? event_dev
->name
: "None",
3286 if (!(event_dev
->priv_flags
& IFF_BONDING
))
3289 if (event_dev
->flags
& IFF_MASTER
) {
3290 pr_debug("IFF_MASTER\n");
3291 return bond_master_netdev_event(event
, event_dev
);
3294 if (event_dev
->flags
& IFF_SLAVE
) {
3295 pr_debug("IFF_SLAVE\n");
3296 return bond_slave_netdev_event(event
, event_dev
);
3303 * bond_inetaddr_event: handle inetaddr notifier chain events.
3305 * We keep track of device IPs primarily to use as source addresses in
3306 * ARP monitor probes (rather than spewing out broadcasts all the time).
3308 * We track one IP for the main device (if it has one), plus one per VLAN.
3310 static int bond_inetaddr_event(struct notifier_block
*this, unsigned long event
, void *ptr
)
3312 struct in_ifaddr
*ifa
= ptr
;
3313 struct net_device
*vlan_dev
, *event_dev
= ifa
->ifa_dev
->dev
;
3314 struct bond_net
*bn
= net_generic(dev_net(event_dev
), bond_net_id
);
3315 struct bonding
*bond
;
3316 struct vlan_entry
*vlan
;
3318 /* we only care about primary address */
3319 if(ifa
->ifa_flags
& IFA_F_SECONDARY
)
3322 list_for_each_entry(bond
, &bn
->dev_list
, bond_list
) {
3323 if (bond
->dev
== event_dev
) {
3326 bond
->master_ip
= ifa
->ifa_local
;
3329 bond
->master_ip
= 0;
3336 list_for_each_entry(vlan
, &bond
->vlan_list
, vlan_list
) {
3337 vlan_dev
= __vlan_find_dev_deep(bond
->dev
,
3339 if (vlan_dev
== event_dev
) {
3342 vlan
->vlan_ip
= ifa
->ifa_local
;
3356 static struct notifier_block bond_netdev_notifier
= {
3357 .notifier_call
= bond_netdev_event
,
3360 static struct notifier_block bond_inetaddr_notifier
= {
3361 .notifier_call
= bond_inetaddr_event
,
3364 /*---------------------------- Hashing Policies -----------------------------*/
3367 * Hash for the output device based upon layer 2 and layer 3 data. If
3368 * the packet is not IP mimic bond_xmit_hash_policy_l2()
3370 static int bond_xmit_hash_policy_l23(struct sk_buff
*skb
, int count
)
3372 struct ethhdr
*data
= (struct ethhdr
*)skb
->data
;
3373 struct iphdr
*iph
= ip_hdr(skb
);
3375 if (skb
->protocol
== htons(ETH_P_IP
)) {
3376 return ((ntohl(iph
->saddr
^ iph
->daddr
) & 0xffff) ^
3377 (data
->h_dest
[5] ^ data
->h_source
[5])) % count
;
3380 return (data
->h_dest
[5] ^ data
->h_source
[5]) % count
;
3384 * Hash for the output device based upon layer 3 and layer 4 data. If
3385 * the packet is a frag or not TCP or UDP, just use layer 3 data. If it is
3386 * altogether not IP, mimic bond_xmit_hash_policy_l2()
3388 static int bond_xmit_hash_policy_l34(struct sk_buff
*skb
, int count
)
3390 struct ethhdr
*data
= (struct ethhdr
*)skb
->data
;
3391 struct iphdr
*iph
= ip_hdr(skb
);
3392 __be16
*layer4hdr
= (__be16
*)((u32
*)iph
+ iph
->ihl
);
3395 if (skb
->protocol
== htons(ETH_P_IP
)) {
3396 if (!ip_is_fragment(iph
) &&
3397 (iph
->protocol
== IPPROTO_TCP
||
3398 iph
->protocol
== IPPROTO_UDP
)) {
3399 layer4_xor
= ntohs((*layer4hdr
^ *(layer4hdr
+ 1)));
3401 return (layer4_xor
^
3402 ((ntohl(iph
->saddr
^ iph
->daddr
)) & 0xffff)) % count
;
3406 return (data
->h_dest
[5] ^ data
->h_source
[5]) % count
;
3410 * Hash for the output device based upon layer 2 data
3412 static int bond_xmit_hash_policy_l2(struct sk_buff
*skb
, int count
)
3414 struct ethhdr
*data
= (struct ethhdr
*)skb
->data
;
3416 return (data
->h_dest
[5] ^ data
->h_source
[5]) % count
;
3419 /*-------------------------- Device entry points ----------------------------*/
3421 static int bond_open(struct net_device
*bond_dev
)
3423 struct bonding
*bond
= netdev_priv(bond_dev
);
3424 struct slave
*slave
;
3427 /* reset slave->backup and slave->inactive */
3428 read_lock(&bond
->lock
);
3429 if (bond
->slave_cnt
> 0) {
3430 read_lock(&bond
->curr_slave_lock
);
3431 bond_for_each_slave(bond
, slave
, i
) {
3432 if ((bond
->params
.mode
== BOND_MODE_ACTIVEBACKUP
)
3433 && (slave
!= bond
->curr_active_slave
)) {
3434 bond_set_slave_inactive_flags(slave
);
3436 bond_set_slave_active_flags(slave
);
3439 read_unlock(&bond
->curr_slave_lock
);
3441 read_unlock(&bond
->lock
);
3443 INIT_DELAYED_WORK(&bond
->mcast_work
, bond_resend_igmp_join_requests_delayed
);
3445 if (bond_is_lb(bond
)) {
3446 /* bond_alb_initialize must be called before the timer
3449 if (bond_alb_initialize(bond
, (bond
->params
.mode
== BOND_MODE_ALB
))) {
3450 /* something went wrong - fail the open operation */
3454 INIT_DELAYED_WORK(&bond
->alb_work
, bond_alb_monitor
);
3455 queue_delayed_work(bond
->wq
, &bond
->alb_work
, 0);
3458 if (bond
->params
.miimon
) { /* link check interval, in milliseconds. */
3459 INIT_DELAYED_WORK(&bond
->mii_work
, bond_mii_monitor
);
3460 queue_delayed_work(bond
->wq
, &bond
->mii_work
, 0);
3463 if (bond
->params
.arp_interval
) { /* arp interval, in milliseconds. */
3464 if (bond
->params
.mode
== BOND_MODE_ACTIVEBACKUP
)
3465 INIT_DELAYED_WORK(&bond
->arp_work
,
3466 bond_activebackup_arp_mon
);
3468 INIT_DELAYED_WORK(&bond
->arp_work
,
3469 bond_loadbalance_arp_mon
);
3471 queue_delayed_work(bond
->wq
, &bond
->arp_work
, 0);
3472 if (bond
->params
.arp_validate
)
3473 bond
->recv_probe
= bond_arp_rcv
;
3476 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
3477 INIT_DELAYED_WORK(&bond
->ad_work
, bond_3ad_state_machine_handler
);
3478 queue_delayed_work(bond
->wq
, &bond
->ad_work
, 0);
3479 /* register to receive LACPDUs */
3480 bond
->recv_probe
= bond_3ad_lacpdu_recv
;
3481 bond_3ad_initiate_agg_selection(bond
, 1);
3487 static int bond_close(struct net_device
*bond_dev
)
3489 struct bonding
*bond
= netdev_priv(bond_dev
);
3491 write_lock_bh(&bond
->lock
);
3493 bond
->send_peer_notif
= 0;
3495 write_unlock_bh(&bond
->lock
);
3497 if (bond
->params
.miimon
) { /* link check interval, in milliseconds. */
3498 cancel_delayed_work_sync(&bond
->mii_work
);
3501 if (bond
->params
.arp_interval
) { /* arp interval, in milliseconds. */
3502 cancel_delayed_work_sync(&bond
->arp_work
);
3505 switch (bond
->params
.mode
) {
3506 case BOND_MODE_8023AD
:
3507 cancel_delayed_work_sync(&bond
->ad_work
);
3511 cancel_delayed_work_sync(&bond
->alb_work
);
3517 if (delayed_work_pending(&bond
->mcast_work
))
3518 cancel_delayed_work_sync(&bond
->mcast_work
);
3520 if (bond_is_lb(bond
)) {
3521 /* Must be called only after all
3522 * slaves have been released
3524 bond_alb_deinitialize(bond
);
3526 bond
->recv_probe
= NULL
;
3531 static struct rtnl_link_stats64
*bond_get_stats(struct net_device
*bond_dev
,
3532 struct rtnl_link_stats64
*stats
)
3534 struct bonding
*bond
= netdev_priv(bond_dev
);
3535 struct rtnl_link_stats64 temp
;
3536 struct slave
*slave
;
3539 memset(stats
, 0, sizeof(*stats
));
3541 read_lock_bh(&bond
->lock
);
3543 bond_for_each_slave(bond
, slave
, i
) {
3544 const struct rtnl_link_stats64
*sstats
=
3545 dev_get_stats(slave
->dev
, &temp
);
3547 stats
->rx_packets
+= sstats
->rx_packets
;
3548 stats
->rx_bytes
+= sstats
->rx_bytes
;
3549 stats
->rx_errors
+= sstats
->rx_errors
;
3550 stats
->rx_dropped
+= sstats
->rx_dropped
;
3552 stats
->tx_packets
+= sstats
->tx_packets
;
3553 stats
->tx_bytes
+= sstats
->tx_bytes
;
3554 stats
->tx_errors
+= sstats
->tx_errors
;
3555 stats
->tx_dropped
+= sstats
->tx_dropped
;
3557 stats
->multicast
+= sstats
->multicast
;
3558 stats
->collisions
+= sstats
->collisions
;
3560 stats
->rx_length_errors
+= sstats
->rx_length_errors
;
3561 stats
->rx_over_errors
+= sstats
->rx_over_errors
;
3562 stats
->rx_crc_errors
+= sstats
->rx_crc_errors
;
3563 stats
->rx_frame_errors
+= sstats
->rx_frame_errors
;
3564 stats
->rx_fifo_errors
+= sstats
->rx_fifo_errors
;
3565 stats
->rx_missed_errors
+= sstats
->rx_missed_errors
;
3567 stats
->tx_aborted_errors
+= sstats
->tx_aborted_errors
;
3568 stats
->tx_carrier_errors
+= sstats
->tx_carrier_errors
;
3569 stats
->tx_fifo_errors
+= sstats
->tx_fifo_errors
;
3570 stats
->tx_heartbeat_errors
+= sstats
->tx_heartbeat_errors
;
3571 stats
->tx_window_errors
+= sstats
->tx_window_errors
;
3574 read_unlock_bh(&bond
->lock
);
3579 static int bond_do_ioctl(struct net_device
*bond_dev
, struct ifreq
*ifr
, int cmd
)
3581 struct net_device
*slave_dev
= NULL
;
3582 struct ifbond k_binfo
;
3583 struct ifbond __user
*u_binfo
= NULL
;
3584 struct ifslave k_sinfo
;
3585 struct ifslave __user
*u_sinfo
= NULL
;
3586 struct mii_ioctl_data
*mii
= NULL
;
3589 pr_debug("bond_ioctl: master=%s, cmd=%d\n", bond_dev
->name
, cmd
);
3601 * We do this again just in case we were called by SIOCGMIIREG
3602 * instead of SIOCGMIIPHY.
3609 if (mii
->reg_num
== 1) {
3610 struct bonding
*bond
= netdev_priv(bond_dev
);
3612 read_lock(&bond
->lock
);
3613 read_lock(&bond
->curr_slave_lock
);
3614 if (netif_carrier_ok(bond
->dev
))
3615 mii
->val_out
= BMSR_LSTATUS
;
3617 read_unlock(&bond
->curr_slave_lock
);
3618 read_unlock(&bond
->lock
);
3622 case BOND_INFO_QUERY_OLD
:
3623 case SIOCBONDINFOQUERY
:
3624 u_binfo
= (struct ifbond __user
*)ifr
->ifr_data
;
3626 if (copy_from_user(&k_binfo
, u_binfo
, sizeof(ifbond
)))
3629 res
= bond_info_query(bond_dev
, &k_binfo
);
3631 copy_to_user(u_binfo
, &k_binfo
, sizeof(ifbond
)))
3635 case BOND_SLAVE_INFO_QUERY_OLD
:
3636 case SIOCBONDSLAVEINFOQUERY
:
3637 u_sinfo
= (struct ifslave __user
*)ifr
->ifr_data
;
3639 if (copy_from_user(&k_sinfo
, u_sinfo
, sizeof(ifslave
)))
3642 res
= bond_slave_info_query(bond_dev
, &k_sinfo
);
3644 copy_to_user(u_sinfo
, &k_sinfo
, sizeof(ifslave
)))
3653 if (!capable(CAP_NET_ADMIN
))
3656 slave_dev
= dev_get_by_name(dev_net(bond_dev
), ifr
->ifr_slave
);
3658 pr_debug("slave_dev=%p:\n", slave_dev
);
3663 pr_debug("slave_dev->name=%s:\n", slave_dev
->name
);
3665 case BOND_ENSLAVE_OLD
:
3666 case SIOCBONDENSLAVE
:
3667 res
= bond_enslave(bond_dev
, slave_dev
);
3669 case BOND_RELEASE_OLD
:
3670 case SIOCBONDRELEASE
:
3671 res
= bond_release(bond_dev
, slave_dev
);
3673 case BOND_SETHWADDR_OLD
:
3674 case SIOCBONDSETHWADDR
:
3675 res
= bond_sethwaddr(bond_dev
, slave_dev
);
3677 case BOND_CHANGE_ACTIVE_OLD
:
3678 case SIOCBONDCHANGEACTIVE
:
3679 res
= bond_ioctl_change_active(bond_dev
, slave_dev
);
3691 static bool bond_addr_in_mc_list(unsigned char *addr
,
3692 struct netdev_hw_addr_list
*list
,
3695 struct netdev_hw_addr
*ha
;
3697 netdev_hw_addr_list_for_each(ha
, list
)
3698 if (!memcmp(ha
->addr
, addr
, addrlen
))
3704 static void bond_change_rx_flags(struct net_device
*bond_dev
, int change
)
3706 struct bonding
*bond
= netdev_priv(bond_dev
);
3708 if (change
& IFF_PROMISC
)
3709 bond_set_promiscuity(bond
,
3710 bond_dev
->flags
& IFF_PROMISC
? 1 : -1);
3712 if (change
& IFF_ALLMULTI
)
3713 bond_set_allmulti(bond
,
3714 bond_dev
->flags
& IFF_ALLMULTI
? 1 : -1);
3717 static void bond_set_multicast_list(struct net_device
*bond_dev
)
3719 struct bonding
*bond
= netdev_priv(bond_dev
);
3720 struct netdev_hw_addr
*ha
;
3723 read_lock(&bond
->lock
);
3725 /* looking for addresses to add to slaves' mc list */
3726 netdev_for_each_mc_addr(ha
, bond_dev
) {
3727 found
= bond_addr_in_mc_list(ha
->addr
, &bond
->mc_list
,
3728 bond_dev
->addr_len
);
3730 bond_mc_add(bond
, ha
->addr
);
3733 /* looking for addresses to delete from slaves' list */
3734 netdev_hw_addr_list_for_each(ha
, &bond
->mc_list
) {
3735 found
= bond_addr_in_mc_list(ha
->addr
, &bond_dev
->mc
,
3736 bond_dev
->addr_len
);
3738 bond_mc_del(bond
, ha
->addr
);
3741 /* save master's multicast list */
3742 __hw_addr_flush(&bond
->mc_list
);
3743 __hw_addr_add_multiple(&bond
->mc_list
, &bond_dev
->mc
,
3744 bond_dev
->addr_len
, NETDEV_HW_ADDR_T_MULTICAST
);
3746 read_unlock(&bond
->lock
);
3749 static int bond_neigh_setup(struct net_device
*dev
, struct neigh_parms
*parms
)
3751 struct bonding
*bond
= netdev_priv(dev
);
3752 struct slave
*slave
= bond
->first_slave
;
3755 const struct net_device_ops
*slave_ops
3756 = slave
->dev
->netdev_ops
;
3757 if (slave_ops
->ndo_neigh_setup
)
3758 return slave_ops
->ndo_neigh_setup(slave
->dev
, parms
);
3764 * Change the MTU of all of a master's slaves to match the master
3766 static int bond_change_mtu(struct net_device
*bond_dev
, int new_mtu
)
3768 struct bonding
*bond
= netdev_priv(bond_dev
);
3769 struct slave
*slave
, *stop_at
;
3773 pr_debug("bond=%p, name=%s, new_mtu=%d\n", bond
,
3774 (bond_dev
? bond_dev
->name
: "None"), new_mtu
);
3776 /* Can't hold bond->lock with bh disabled here since
3777 * some base drivers panic. On the other hand we can't
3778 * hold bond->lock without bh disabled because we'll
3779 * deadlock. The only solution is to rely on the fact
3780 * that we're under rtnl_lock here, and the slaves
3781 * list won't change. This doesn't solve the problem
3782 * of setting the slave's MTU while it is
3783 * transmitting, but the assumption is that the base
3784 * driver can handle that.
3786 * TODO: figure out a way to safely iterate the slaves
3787 * list, but without holding a lock around the actual
3788 * call to the base driver.
3791 bond_for_each_slave(bond
, slave
, i
) {
3792 pr_debug("s %p s->p %p c_m %p\n",
3795 slave
->dev
->netdev_ops
->ndo_change_mtu
);
3797 res
= dev_set_mtu(slave
->dev
, new_mtu
);
3800 /* If we failed to set the slave's mtu to the new value
3801 * we must abort the operation even in ACTIVE_BACKUP
3802 * mode, because if we allow the backup slaves to have
3803 * different mtu values than the active slave we'll
3804 * need to change their mtu when doing a failover. That
3805 * means changing their mtu from timer context, which
3806 * is probably not a good idea.
3808 pr_debug("err %d %s\n", res
, slave
->dev
->name
);
3813 bond_dev
->mtu
= new_mtu
;
3818 /* unwind from head to the slave that failed */
3820 bond_for_each_slave_from_to(bond
, slave
, i
, bond
->first_slave
, stop_at
) {
3823 tmp_res
= dev_set_mtu(slave
->dev
, bond_dev
->mtu
);
3825 pr_debug("unwind err %d dev %s\n",
3826 tmp_res
, slave
->dev
->name
);
3836 * Note that many devices must be down to change the HW address, and
3837 * downing the master releases all slaves. We can make bonds full of
3838 * bonding devices to test this, however.
3840 static int bond_set_mac_address(struct net_device
*bond_dev
, void *addr
)
3842 struct bonding
*bond
= netdev_priv(bond_dev
);
3843 struct sockaddr
*sa
= addr
, tmp_sa
;
3844 struct slave
*slave
, *stop_at
;
3848 if (bond
->params
.mode
== BOND_MODE_ALB
)
3849 return bond_alb_set_mac_address(bond_dev
, addr
);
3852 pr_debug("bond=%p, name=%s\n",
3853 bond
, bond_dev
? bond_dev
->name
: "None");
3856 * If fail_over_mac is set to active, do nothing and return
3857 * success. Returning an error causes ifenslave to fail.
3859 if (bond
->params
.fail_over_mac
== BOND_FOM_ACTIVE
)
3862 if (!is_valid_ether_addr(sa
->sa_data
))
3863 return -EADDRNOTAVAIL
;
3865 /* Can't hold bond->lock with bh disabled here since
3866 * some base drivers panic. On the other hand we can't
3867 * hold bond->lock without bh disabled because we'll
3868 * deadlock. The only solution is to rely on the fact
3869 * that we're under rtnl_lock here, and the slaves
3870 * list won't change. This doesn't solve the problem
3871 * of setting the slave's hw address while it is
3872 * transmitting, but the assumption is that the base
3873 * driver can handle that.
3875 * TODO: figure out a way to safely iterate the slaves
3876 * list, but without holding a lock around the actual
3877 * call to the base driver.
3880 bond_for_each_slave(bond
, slave
, i
) {
3881 const struct net_device_ops
*slave_ops
= slave
->dev
->netdev_ops
;
3882 pr_debug("slave %p %s\n", slave
, slave
->dev
->name
);
3884 if (slave_ops
->ndo_set_mac_address
== NULL
) {
3886 pr_debug("EOPNOTSUPP %s\n", slave
->dev
->name
);
3890 res
= dev_set_mac_address(slave
->dev
, addr
);
3892 /* TODO: consider downing the slave
3894 * User should expect communications
3895 * breakage anyway until ARP finish
3898 pr_debug("err %d %s\n", res
, slave
->dev
->name
);
3904 memcpy(bond_dev
->dev_addr
, sa
->sa_data
, bond_dev
->addr_len
);
3908 memcpy(tmp_sa
.sa_data
, bond_dev
->dev_addr
, bond_dev
->addr_len
);
3909 tmp_sa
.sa_family
= bond_dev
->type
;
3911 /* unwind from head to the slave that failed */
3913 bond_for_each_slave_from_to(bond
, slave
, i
, bond
->first_slave
, stop_at
) {
3916 tmp_res
= dev_set_mac_address(slave
->dev
, &tmp_sa
);
3918 pr_debug("unwind err %d dev %s\n",
3919 tmp_res
, slave
->dev
->name
);
3926 static int bond_xmit_roundrobin(struct sk_buff
*skb
, struct net_device
*bond_dev
)
3928 struct bonding
*bond
= netdev_priv(bond_dev
);
3929 struct slave
*slave
, *start_at
;
3930 int i
, slave_no
, res
= 1;
3931 struct iphdr
*iph
= ip_hdr(skb
);
3934 * Start with the curr_active_slave that joined the bond as the
3935 * default for sending IGMP traffic. For failover purposes one
3936 * needs to maintain some consistency for the interface that will
3937 * send the join/membership reports. The curr_active_slave found
3938 * will send all of this type of traffic.
3940 if ((iph
->protocol
== IPPROTO_IGMP
) &&
3941 (skb
->protocol
== htons(ETH_P_IP
))) {
3943 read_lock(&bond
->curr_slave_lock
);
3944 slave
= bond
->curr_active_slave
;
3945 read_unlock(&bond
->curr_slave_lock
);
3951 * Concurrent TX may collide on rr_tx_counter; we accept
3952 * that as being rare enough not to justify using an
3955 slave_no
= bond
->rr_tx_counter
++ % bond
->slave_cnt
;
3957 bond_for_each_slave(bond
, slave
, i
) {
3965 bond_for_each_slave_from(bond
, slave
, i
, start_at
) {
3966 if (IS_UP(slave
->dev
) &&
3967 (slave
->link
== BOND_LINK_UP
) &&
3968 bond_is_active_slave(slave
)) {
3969 res
= bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
3976 /* no suitable interface, frame not sent */
3980 return NETDEV_TX_OK
;
3985 * in active-backup mode, we know that bond->curr_active_slave is always valid if
3986 * the bond has a usable interface.
3988 static int bond_xmit_activebackup(struct sk_buff
*skb
, struct net_device
*bond_dev
)
3990 struct bonding
*bond
= netdev_priv(bond_dev
);
3993 read_lock(&bond
->curr_slave_lock
);
3995 if (bond
->curr_active_slave
)
3996 res
= bond_dev_queue_xmit(bond
, skb
,
3997 bond
->curr_active_slave
->dev
);
4000 /* no suitable interface, frame not sent */
4003 read_unlock(&bond
->curr_slave_lock
);
4005 return NETDEV_TX_OK
;
4009 * In bond_xmit_xor() , we determine the output device by using a pre-
4010 * determined xmit_hash_policy(), If the selected device is not enabled,
4011 * find the next active slave.
4013 static int bond_xmit_xor(struct sk_buff
*skb
, struct net_device
*bond_dev
)
4015 struct bonding
*bond
= netdev_priv(bond_dev
);
4016 struct slave
*slave
, *start_at
;
4021 slave_no
= bond
->xmit_hash_policy(skb
, bond
->slave_cnt
);
4023 bond_for_each_slave(bond
, slave
, i
) {
4031 bond_for_each_slave_from(bond
, slave
, i
, start_at
) {
4032 if (IS_UP(slave
->dev
) &&
4033 (slave
->link
== BOND_LINK_UP
) &&
4034 bond_is_active_slave(slave
)) {
4035 res
= bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
4041 /* no suitable interface, frame not sent */
4045 return NETDEV_TX_OK
;
4049 * in broadcast mode, we send everything to all usable interfaces.
4051 static int bond_xmit_broadcast(struct sk_buff
*skb
, struct net_device
*bond_dev
)
4053 struct bonding
*bond
= netdev_priv(bond_dev
);
4054 struct slave
*slave
, *start_at
;
4055 struct net_device
*tx_dev
= NULL
;
4059 read_lock(&bond
->curr_slave_lock
);
4060 start_at
= bond
->curr_active_slave
;
4061 read_unlock(&bond
->curr_slave_lock
);
4066 bond_for_each_slave_from(bond
, slave
, i
, start_at
) {
4067 if (IS_UP(slave
->dev
) &&
4068 (slave
->link
== BOND_LINK_UP
) &&
4069 bond_is_active_slave(slave
)) {
4071 struct sk_buff
*skb2
= skb_clone(skb
, GFP_ATOMIC
);
4073 pr_err("%s: Error: bond_xmit_broadcast(): skb_clone() failed\n",
4078 res
= bond_dev_queue_xmit(bond
, skb2
, tx_dev
);
4080 dev_kfree_skb(skb2
);
4084 tx_dev
= slave
->dev
;
4089 res
= bond_dev_queue_xmit(bond
, skb
, tx_dev
);
4093 /* no suitable interface, frame not sent */
4096 /* frame sent to all suitable interfaces */
4097 return NETDEV_TX_OK
;
4100 /*------------------------- Device initialization ---------------------------*/
4102 static void bond_set_xmit_hash_policy(struct bonding
*bond
)
4104 switch (bond
->params
.xmit_policy
) {
4105 case BOND_XMIT_POLICY_LAYER23
:
4106 bond
->xmit_hash_policy
= bond_xmit_hash_policy_l23
;
4108 case BOND_XMIT_POLICY_LAYER34
:
4109 bond
->xmit_hash_policy
= bond_xmit_hash_policy_l34
;
4111 case BOND_XMIT_POLICY_LAYER2
:
4113 bond
->xmit_hash_policy
= bond_xmit_hash_policy_l2
;
4119 * Lookup the slave that corresponds to a qid
4121 static inline int bond_slave_override(struct bonding
*bond
,
4122 struct sk_buff
*skb
)
4125 struct slave
*slave
= NULL
;
4126 struct slave
*check_slave
;
4128 if (!skb
->queue_mapping
)
4131 /* Find out if any slaves have the same mapping as this skb. */
4132 bond_for_each_slave(bond
, check_slave
, i
) {
4133 if (check_slave
->queue_id
== skb
->queue_mapping
) {
4134 slave
= check_slave
;
4139 /* If the slave isn't UP, use default transmit policy. */
4140 if (slave
&& slave
->queue_id
&& IS_UP(slave
->dev
) &&
4141 (slave
->link
== BOND_LINK_UP
)) {
4142 res
= bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
4149 static u16
bond_select_queue(struct net_device
*dev
, struct sk_buff
*skb
)
4152 * This helper function exists to help dev_pick_tx get the correct
4153 * destination queue. Using a helper function skips a call to
4154 * skb_tx_hash and will put the skbs in the queue we expect on their
4155 * way down to the bonding driver.
4157 u16 txq
= skb_rx_queue_recorded(skb
) ? skb_get_rx_queue(skb
) : 0;
4160 * Save the original txq to restore before passing to the driver
4162 bond_queue_mapping(skb
) = skb
->queue_mapping
;
4164 if (unlikely(txq
>= dev
->real_num_tx_queues
)) {
4166 txq
-= dev
->real_num_tx_queues
;
4167 } while (txq
>= dev
->real_num_tx_queues
);
4172 static netdev_tx_t
__bond_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
4174 struct bonding
*bond
= netdev_priv(dev
);
4176 if (TX_QUEUE_OVERRIDE(bond
->params
.mode
)) {
4177 if (!bond_slave_override(bond
, skb
))
4178 return NETDEV_TX_OK
;
4181 switch (bond
->params
.mode
) {
4182 case BOND_MODE_ROUNDROBIN
:
4183 return bond_xmit_roundrobin(skb
, dev
);
4184 case BOND_MODE_ACTIVEBACKUP
:
4185 return bond_xmit_activebackup(skb
, dev
);
4187 return bond_xmit_xor(skb
, dev
);
4188 case BOND_MODE_BROADCAST
:
4189 return bond_xmit_broadcast(skb
, dev
);
4190 case BOND_MODE_8023AD
:
4191 return bond_3ad_xmit_xor(skb
, dev
);
4194 return bond_alb_xmit(skb
, dev
);
4196 /* Should never happen, mode already checked */
4197 pr_err("%s: Error: Unknown bonding mode %d\n",
4198 dev
->name
, bond
->params
.mode
);
4201 return NETDEV_TX_OK
;
4205 static netdev_tx_t
bond_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
4207 struct bonding
*bond
= netdev_priv(dev
);
4208 netdev_tx_t ret
= NETDEV_TX_OK
;
4211 * If we risk deadlock from transmitting this in the
4212 * netpoll path, tell netpoll to queue the frame for later tx
4214 if (is_netpoll_tx_blocked(dev
))
4215 return NETDEV_TX_BUSY
;
4217 read_lock(&bond
->lock
);
4219 if (bond
->slave_cnt
)
4220 ret
= __bond_start_xmit(skb
, dev
);
4224 read_unlock(&bond
->lock
);
4230 * set bond mode specific net device operations
4232 void bond_set_mode_ops(struct bonding
*bond
, int mode
)
4234 struct net_device
*bond_dev
= bond
->dev
;
4237 case BOND_MODE_ROUNDROBIN
:
4239 case BOND_MODE_ACTIVEBACKUP
:
4242 bond_set_xmit_hash_policy(bond
);
4244 case BOND_MODE_BROADCAST
:
4246 case BOND_MODE_8023AD
:
4247 bond_set_xmit_hash_policy(bond
);
4254 /* Should never happen, mode already checked */
4255 pr_err("%s: Error: Unknown bonding mode %d\n",
4256 bond_dev
->name
, mode
);
4261 static void bond_ethtool_get_drvinfo(struct net_device
*bond_dev
,
4262 struct ethtool_drvinfo
*drvinfo
)
4264 strncpy(drvinfo
->driver
, DRV_NAME
, 32);
4265 strncpy(drvinfo
->version
, DRV_VERSION
, 32);
4266 snprintf(drvinfo
->fw_version
, 32, "%d", BOND_ABI_VERSION
);
4269 static const struct ethtool_ops bond_ethtool_ops
= {
4270 .get_drvinfo
= bond_ethtool_get_drvinfo
,
4271 .get_link
= ethtool_op_get_link
,
4274 static const struct net_device_ops bond_netdev_ops
= {
4275 .ndo_init
= bond_init
,
4276 .ndo_uninit
= bond_uninit
,
4277 .ndo_open
= bond_open
,
4278 .ndo_stop
= bond_close
,
4279 .ndo_start_xmit
= bond_start_xmit
,
4280 .ndo_select_queue
= bond_select_queue
,
4281 .ndo_get_stats64
= bond_get_stats
,
4282 .ndo_do_ioctl
= bond_do_ioctl
,
4283 .ndo_change_rx_flags
= bond_change_rx_flags
,
4284 .ndo_set_rx_mode
= bond_set_multicast_list
,
4285 .ndo_change_mtu
= bond_change_mtu
,
4286 .ndo_set_mac_address
= bond_set_mac_address
,
4287 .ndo_neigh_setup
= bond_neigh_setup
,
4288 .ndo_vlan_rx_add_vid
= bond_vlan_rx_add_vid
,
4289 .ndo_vlan_rx_kill_vid
= bond_vlan_rx_kill_vid
,
4290 #ifdef CONFIG_NET_POLL_CONTROLLER
4291 .ndo_netpoll_setup
= bond_netpoll_setup
,
4292 .ndo_netpoll_cleanup
= bond_netpoll_cleanup
,
4293 .ndo_poll_controller
= bond_poll_controller
,
4295 .ndo_add_slave
= bond_enslave
,
4296 .ndo_del_slave
= bond_release
,
4297 .ndo_fix_features
= bond_fix_features
,
4300 static void bond_destructor(struct net_device
*bond_dev
)
4302 struct bonding
*bond
= netdev_priv(bond_dev
);
4304 destroy_workqueue(bond
->wq
);
4305 free_netdev(bond_dev
);
4308 static void bond_setup(struct net_device
*bond_dev
)
4310 struct bonding
*bond
= netdev_priv(bond_dev
);
4312 /* initialize rwlocks */
4313 rwlock_init(&bond
->lock
);
4314 rwlock_init(&bond
->curr_slave_lock
);
4316 bond
->params
= bonding_defaults
;
4318 /* Initialize pointers */
4319 bond
->dev
= bond_dev
;
4320 INIT_LIST_HEAD(&bond
->vlan_list
);
4322 /* Initialize the device entry points */
4323 ether_setup(bond_dev
);
4324 bond_dev
->netdev_ops
= &bond_netdev_ops
;
4325 bond_dev
->ethtool_ops
= &bond_ethtool_ops
;
4326 bond_set_mode_ops(bond
, bond
->params
.mode
);
4328 bond_dev
->destructor
= bond_destructor
;
4330 /* Initialize the device options */
4331 bond_dev
->tx_queue_len
= 0;
4332 bond_dev
->flags
|= IFF_MASTER
|IFF_MULTICAST
;
4333 bond_dev
->priv_flags
|= IFF_BONDING
;
4334 bond_dev
->priv_flags
&= ~(IFF_XMIT_DST_RELEASE
| IFF_TX_SKB_SHARING
);
4336 /* At first, we block adding VLANs. That's the only way to
4337 * prevent problems that occur when adding VLANs over an
4338 * empty bond. The block will be removed once non-challenged
4339 * slaves are enslaved.
4341 bond_dev
->features
|= NETIF_F_VLAN_CHALLENGED
;
4343 /* don't acquire bond device's netif_tx_lock when
4345 bond_dev
->features
|= NETIF_F_LLTX
;
4347 /* By default, we declare the bond to be fully
4348 * VLAN hardware accelerated capable. Special
4349 * care is taken in the various xmit functions
4350 * when there are slaves that are not hw accel
4354 bond_dev
->hw_features
= BOND_VLAN_FEATURES
|
4355 NETIF_F_HW_VLAN_TX
|
4356 NETIF_F_HW_VLAN_RX
|
4357 NETIF_F_HW_VLAN_FILTER
;
4359 bond_dev
->hw_features
&= ~(NETIF_F_ALL_CSUM
& ~NETIF_F_HW_CSUM
);
4360 bond_dev
->features
|= bond_dev
->hw_features
;
4363 static void bond_work_cancel_all(struct bonding
*bond
)
4365 if (bond
->params
.miimon
&& delayed_work_pending(&bond
->mii_work
))
4366 cancel_delayed_work_sync(&bond
->mii_work
);
4368 if (bond
->params
.arp_interval
&& delayed_work_pending(&bond
->arp_work
))
4369 cancel_delayed_work_sync(&bond
->arp_work
);
4371 if (bond
->params
.mode
== BOND_MODE_ALB
&&
4372 delayed_work_pending(&bond
->alb_work
))
4373 cancel_delayed_work_sync(&bond
->alb_work
);
4375 if (bond
->params
.mode
== BOND_MODE_8023AD
&&
4376 delayed_work_pending(&bond
->ad_work
))
4377 cancel_delayed_work_sync(&bond
->ad_work
);
4379 if (delayed_work_pending(&bond
->mcast_work
))
4380 cancel_delayed_work_sync(&bond
->mcast_work
);
4384 * Destroy a bonding device.
4385 * Must be under rtnl_lock when this function is called.
4387 static void bond_uninit(struct net_device
*bond_dev
)
4389 struct bonding
*bond
= netdev_priv(bond_dev
);
4390 struct vlan_entry
*vlan
, *tmp
;
4392 bond_netpoll_cleanup(bond_dev
);
4394 /* Release the bonded slaves */
4395 bond_release_all(bond_dev
);
4397 list_del(&bond
->bond_list
);
4399 bond_work_cancel_all(bond
);
4401 bond_remove_proc_entry(bond
);
4403 bond_debug_unregister(bond
);
4405 __hw_addr_flush(&bond
->mc_list
);
4407 list_for_each_entry_safe(vlan
, tmp
, &bond
->vlan_list
, vlan_list
) {
4408 list_del(&vlan
->vlan_list
);
4413 /*------------------------- Module initialization ---------------------------*/
4416 * Convert string input module parms. Accept either the
4417 * number of the mode or its string name. A bit complicated because
4418 * some mode names are substrings of other names, and calls from sysfs
4419 * may have whitespace in the name (trailing newlines, for example).
4421 int bond_parse_parm(const char *buf
, const struct bond_parm_tbl
*tbl
)
4423 int modeint
= -1, i
, rv
;
4424 char *p
, modestr
[BOND_MAX_MODENAME_LEN
+ 1] = { 0, };
4426 for (p
= (char *)buf
; *p
; p
++)
4427 if (!(isdigit(*p
) || isspace(*p
)))
4431 rv
= sscanf(buf
, "%20s", modestr
);
4433 rv
= sscanf(buf
, "%d", &modeint
);
4438 for (i
= 0; tbl
[i
].modename
; i
++) {
4439 if (modeint
== tbl
[i
].mode
)
4441 if (strcmp(modestr
, tbl
[i
].modename
) == 0)
4448 static int bond_check_params(struct bond_params
*params
)
4450 int arp_validate_value
, fail_over_mac_value
, primary_reselect_value
;
4453 * Convert string parameters.
4456 bond_mode
= bond_parse_parm(mode
, bond_mode_tbl
);
4457 if (bond_mode
== -1) {
4458 pr_err("Error: Invalid bonding mode \"%s\"\n",
4459 mode
== NULL
? "NULL" : mode
);
4464 if (xmit_hash_policy
) {
4465 if ((bond_mode
!= BOND_MODE_XOR
) &&
4466 (bond_mode
!= BOND_MODE_8023AD
)) {
4467 pr_info("xmit_hash_policy param is irrelevant in mode %s\n",
4468 bond_mode_name(bond_mode
));
4470 xmit_hashtype
= bond_parse_parm(xmit_hash_policy
,
4472 if (xmit_hashtype
== -1) {
4473 pr_err("Error: Invalid xmit_hash_policy \"%s\"\n",
4474 xmit_hash_policy
== NULL
? "NULL" :
4482 if (bond_mode
!= BOND_MODE_8023AD
) {
4483 pr_info("lacp_rate param is irrelevant in mode %s\n",
4484 bond_mode_name(bond_mode
));
4486 lacp_fast
= bond_parse_parm(lacp_rate
, bond_lacp_tbl
);
4487 if (lacp_fast
== -1) {
4488 pr_err("Error: Invalid lacp rate \"%s\"\n",
4489 lacp_rate
== NULL
? "NULL" : lacp_rate
);
4496 params
->ad_select
= bond_parse_parm(ad_select
, ad_select_tbl
);
4497 if (params
->ad_select
== -1) {
4498 pr_err("Error: Invalid ad_select \"%s\"\n",
4499 ad_select
== NULL
? "NULL" : ad_select
);
4503 if (bond_mode
!= BOND_MODE_8023AD
) {
4504 pr_warning("ad_select param only affects 802.3ad mode\n");
4507 params
->ad_select
= BOND_AD_STABLE
;
4510 if (max_bonds
< 0) {
4511 pr_warning("Warning: max_bonds (%d) not in range %d-%d, so it was reset to BOND_DEFAULT_MAX_BONDS (%d)\n",
4512 max_bonds
, 0, INT_MAX
, BOND_DEFAULT_MAX_BONDS
);
4513 max_bonds
= BOND_DEFAULT_MAX_BONDS
;
4517 pr_warning("Warning: miimon module parameter (%d), not in range 0-%d, so it was reset to %d\n",
4518 miimon
, INT_MAX
, BOND_LINK_MON_INTERV
);
4519 miimon
= BOND_LINK_MON_INTERV
;
4523 pr_warning("Warning: updelay module parameter (%d), not in range 0-%d, so it was reset to 0\n",
4528 if (downdelay
< 0) {
4529 pr_warning("Warning: downdelay module parameter (%d), not in range 0-%d, so it was reset to 0\n",
4530 downdelay
, INT_MAX
);
4534 if ((use_carrier
!= 0) && (use_carrier
!= 1)) {
4535 pr_warning("Warning: use_carrier module parameter (%d), not of valid value (0/1), so it was set to 1\n",
4540 if (num_peer_notif
< 0 || num_peer_notif
> 255) {
4541 pr_warning("Warning: num_grat_arp/num_unsol_na (%d) not in range 0-255 so it was reset to 1\n",
4546 /* reset values for 802.3ad */
4547 if (bond_mode
== BOND_MODE_8023AD
) {
4549 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");
4550 pr_warning("Forcing miimon to 100msec\n");
4555 if (tx_queues
< 1 || tx_queues
> 255) {
4556 pr_warning("Warning: tx_queues (%d) should be between "
4557 "1 and 255, resetting to %d\n",
4558 tx_queues
, BOND_DEFAULT_TX_QUEUES
);
4559 tx_queues
= BOND_DEFAULT_TX_QUEUES
;
4562 if ((all_slaves_active
!= 0) && (all_slaves_active
!= 1)) {
4563 pr_warning("Warning: all_slaves_active module parameter (%d), "
4564 "not of valid value (0/1), so it was set to "
4565 "0\n", all_slaves_active
);
4566 all_slaves_active
= 0;
4569 if (resend_igmp
< 0 || resend_igmp
> 255) {
4570 pr_warning("Warning: resend_igmp (%d) should be between "
4571 "0 and 255, resetting to %d\n",
4572 resend_igmp
, BOND_DEFAULT_RESEND_IGMP
);
4573 resend_igmp
= BOND_DEFAULT_RESEND_IGMP
;
4576 /* reset values for TLB/ALB */
4577 if ((bond_mode
== BOND_MODE_TLB
) ||
4578 (bond_mode
== BOND_MODE_ALB
)) {
4580 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");
4581 pr_warning("Forcing miimon to 100msec\n");
4586 if (bond_mode
== BOND_MODE_ALB
) {
4587 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",
4592 if (updelay
|| downdelay
) {
4593 /* just warn the user the up/down delay will have
4594 * no effect since miimon is zero...
4596 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",
4597 updelay
, downdelay
);
4600 /* don't allow arp monitoring */
4602 pr_warning("Warning: miimon (%d) and arp_interval (%d) can't be used simultaneously, disabling ARP monitoring\n",
4603 miimon
, arp_interval
);
4607 if ((updelay
% miimon
) != 0) {
4608 pr_warning("Warning: updelay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
4610 (updelay
/ miimon
) * miimon
);
4615 if ((downdelay
% miimon
) != 0) {
4616 pr_warning("Warning: downdelay (%d) is not a multiple of miimon (%d), downdelay rounded to %d ms\n",
4618 (downdelay
/ miimon
) * miimon
);
4621 downdelay
/= miimon
;
4624 if (arp_interval
< 0) {
4625 pr_warning("Warning: arp_interval module parameter (%d) , not in range 0-%d, so it was reset to %d\n",
4626 arp_interval
, INT_MAX
, BOND_LINK_ARP_INTERV
);
4627 arp_interval
= BOND_LINK_ARP_INTERV
;
4630 for (arp_ip_count
= 0;
4631 (arp_ip_count
< BOND_MAX_ARP_TARGETS
) && arp_ip_target
[arp_ip_count
];
4633 /* not complete check, but should be good enough to
4635 if (!isdigit(arp_ip_target
[arp_ip_count
][0])) {
4636 pr_warning("Warning: bad arp_ip_target module parameter (%s), ARP monitoring will not be performed\n",
4637 arp_ip_target
[arp_ip_count
]);
4640 __be32 ip
= in_aton(arp_ip_target
[arp_ip_count
]);
4641 arp_target
[arp_ip_count
] = ip
;
4645 if (arp_interval
&& !arp_ip_count
) {
4646 /* don't allow arping if no arp_ip_target given... */
4647 pr_warning("Warning: arp_interval module parameter (%d) specified without providing an arp_ip_target parameter, arp_interval was reset to 0\n",
4653 if (bond_mode
!= BOND_MODE_ACTIVEBACKUP
) {
4654 pr_err("arp_validate only supported in active-backup mode\n");
4657 if (!arp_interval
) {
4658 pr_err("arp_validate requires arp_interval\n");
4662 arp_validate_value
= bond_parse_parm(arp_validate
,
4664 if (arp_validate_value
== -1) {
4665 pr_err("Error: invalid arp_validate \"%s\"\n",
4666 arp_validate
== NULL
? "NULL" : arp_validate
);
4670 arp_validate_value
= 0;
4673 pr_info("MII link monitoring set to %d ms\n", miimon
);
4674 } else if (arp_interval
) {
4677 pr_info("ARP monitoring set to %d ms, validate %s, with %d target(s):",
4679 arp_validate_tbl
[arp_validate_value
].modename
,
4682 for (i
= 0; i
< arp_ip_count
; i
++)
4683 pr_info(" %s", arp_ip_target
[i
]);
4687 } else if (max_bonds
) {
4688 /* miimon and arp_interval not set, we need one so things
4689 * work as expected, see bonding.txt for details
4691 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");
4694 if (primary
&& !USES_PRIMARY(bond_mode
)) {
4695 /* currently, using a primary only makes sense
4696 * in active backup, TLB or ALB modes
4698 pr_warning("Warning: %s primary device specified but has no effect in %s mode\n",
4699 primary
, bond_mode_name(bond_mode
));
4703 if (primary
&& primary_reselect
) {
4704 primary_reselect_value
= bond_parse_parm(primary_reselect
,
4706 if (primary_reselect_value
== -1) {
4707 pr_err("Error: Invalid primary_reselect \"%s\"\n",
4709 NULL
? "NULL" : primary_reselect
);
4713 primary_reselect_value
= BOND_PRI_RESELECT_ALWAYS
;
4716 if (fail_over_mac
) {
4717 fail_over_mac_value
= bond_parse_parm(fail_over_mac
,
4719 if (fail_over_mac_value
== -1) {
4720 pr_err("Error: invalid fail_over_mac \"%s\"\n",
4721 arp_validate
== NULL
? "NULL" : arp_validate
);
4725 if (bond_mode
!= BOND_MODE_ACTIVEBACKUP
)
4726 pr_warning("Warning: fail_over_mac only affects active-backup mode.\n");
4728 fail_over_mac_value
= BOND_FOM_NONE
;
4731 /* fill params struct with the proper values */
4732 params
->mode
= bond_mode
;
4733 params
->xmit_policy
= xmit_hashtype
;
4734 params
->miimon
= miimon
;
4735 params
->num_peer_notif
= num_peer_notif
;
4736 params
->arp_interval
= arp_interval
;
4737 params
->arp_validate
= arp_validate_value
;
4738 params
->updelay
= updelay
;
4739 params
->downdelay
= downdelay
;
4740 params
->use_carrier
= use_carrier
;
4741 params
->lacp_fast
= lacp_fast
;
4742 params
->primary
[0] = 0;
4743 params
->primary_reselect
= primary_reselect_value
;
4744 params
->fail_over_mac
= fail_over_mac_value
;
4745 params
->tx_queues
= tx_queues
;
4746 params
->all_slaves_active
= all_slaves_active
;
4747 params
->resend_igmp
= resend_igmp
;
4748 params
->min_links
= min_links
;
4751 strncpy(params
->primary
, primary
, IFNAMSIZ
);
4752 params
->primary
[IFNAMSIZ
- 1] = 0;
4755 memcpy(params
->arp_targets
, arp_target
, sizeof(arp_target
));
4760 static struct lock_class_key bonding_netdev_xmit_lock_key
;
4761 static struct lock_class_key bonding_netdev_addr_lock_key
;
4763 static void bond_set_lockdep_class_one(struct net_device
*dev
,
4764 struct netdev_queue
*txq
,
4767 lockdep_set_class(&txq
->_xmit_lock
,
4768 &bonding_netdev_xmit_lock_key
);
4771 static void bond_set_lockdep_class(struct net_device
*dev
)
4773 lockdep_set_class(&dev
->addr_list_lock
,
4774 &bonding_netdev_addr_lock_key
);
4775 netdev_for_each_tx_queue(dev
, bond_set_lockdep_class_one
, NULL
);
4779 * Called from registration process
4781 static int bond_init(struct net_device
*bond_dev
)
4783 struct bonding
*bond
= netdev_priv(bond_dev
);
4784 struct bond_net
*bn
= net_generic(dev_net(bond_dev
), bond_net_id
);
4785 struct alb_bond_info
*bond_info
= &(BOND_ALB_INFO(bond
));
4787 pr_debug("Begin bond_init for %s\n", bond_dev
->name
);
4790 * Initialize locks that may be required during
4791 * en/deslave operations. All of the bond_open work
4792 * (of which this is part) should really be moved to
4793 * a phase prior to dev_open
4795 spin_lock_init(&(bond_info
->tx_hashtbl_lock
));
4796 spin_lock_init(&(bond_info
->rx_hashtbl_lock
));
4798 bond
->wq
= create_singlethread_workqueue(bond_dev
->name
);
4802 bond_set_lockdep_class(bond_dev
);
4804 bond_create_proc_entry(bond
);
4805 list_add_tail(&bond
->bond_list
, &bn
->dev_list
);
4807 bond_prepare_sysfs_group(bond
);
4809 bond_debug_register(bond
);
4811 __hw_addr_init(&bond
->mc_list
);
4815 static int bond_validate(struct nlattr
*tb
[], struct nlattr
*data
[])
4817 if (tb
[IFLA_ADDRESS
]) {
4818 if (nla_len(tb
[IFLA_ADDRESS
]) != ETH_ALEN
)
4820 if (!is_valid_ether_addr(nla_data(tb
[IFLA_ADDRESS
])))
4821 return -EADDRNOTAVAIL
;
4826 static int bond_get_tx_queues(struct net
*net
, struct nlattr
*tb
[],
4827 unsigned int *num_queues
,
4828 unsigned int *real_num_queues
)
4830 *num_queues
= tx_queues
;
4834 static struct rtnl_link_ops bond_link_ops __read_mostly
= {
4836 .priv_size
= sizeof(struct bonding
),
4837 .setup
= bond_setup
,
4838 .validate
= bond_validate
,
4839 .get_tx_queues
= bond_get_tx_queues
,
4842 /* Create a new bond based on the specified name and bonding parameters.
4843 * If name is NULL, obtain a suitable "bond%d" name for us.
4844 * Caller must NOT hold rtnl_lock; we need to release it here before we
4845 * set up our sysfs entries.
4847 int bond_create(struct net
*net
, const char *name
)
4849 struct net_device
*bond_dev
;
4854 bond_dev
= alloc_netdev_mq(sizeof(struct bonding
),
4855 name
? name
: "bond%d",
4856 bond_setup
, tx_queues
);
4858 pr_err("%s: eek! can't alloc netdev!\n", name
);
4863 dev_net_set(bond_dev
, net
);
4864 bond_dev
->rtnl_link_ops
= &bond_link_ops
;
4866 res
= register_netdevice(bond_dev
);
4868 netif_carrier_off(bond_dev
);
4872 bond_destructor(bond_dev
);
4876 static int __net_init
bond_net_init(struct net
*net
)
4878 struct bond_net
*bn
= net_generic(net
, bond_net_id
);
4881 INIT_LIST_HEAD(&bn
->dev_list
);
4883 bond_create_proc_dir(bn
);
4884 bond_create_sysfs(bn
);
4889 static void __net_exit
bond_net_exit(struct net
*net
)
4891 struct bond_net
*bn
= net_generic(net
, bond_net_id
);
4893 bond_destroy_sysfs(bn
);
4894 bond_destroy_proc_dir(bn
);
4897 static struct pernet_operations bond_net_ops
= {
4898 .init
= bond_net_init
,
4899 .exit
= bond_net_exit
,
4901 .size
= sizeof(struct bond_net
),
4904 static int __init
bonding_init(void)
4909 pr_info("%s", bond_version
);
4911 res
= bond_check_params(&bonding_defaults
);
4915 res
= register_pernet_subsys(&bond_net_ops
);
4919 res
= rtnl_link_register(&bond_link_ops
);
4923 bond_create_debugfs();
4925 for (i
= 0; i
< max_bonds
; i
++) {
4926 res
= bond_create(&init_net
, NULL
);
4931 register_netdevice_notifier(&bond_netdev_notifier
);
4932 register_inetaddr_notifier(&bond_inetaddr_notifier
);
4936 rtnl_link_unregister(&bond_link_ops
);
4938 unregister_pernet_subsys(&bond_net_ops
);
4943 static void __exit
bonding_exit(void)
4945 unregister_netdevice_notifier(&bond_netdev_notifier
);
4946 unregister_inetaddr_notifier(&bond_inetaddr_notifier
);
4948 bond_destroy_debugfs();
4950 rtnl_link_unregister(&bond_link_ops
);
4951 unregister_pernet_subsys(&bond_net_ops
);
4953 #ifdef CONFIG_NET_POLL_CONTROLLER
4955 * Make sure we don't have an imbalance on our netpoll blocking
4957 WARN_ON(atomic_read(&netpoll_block_tx
));
4961 module_init(bonding_init
);
4962 module_exit(bonding_exit
);
4963 MODULE_LICENSE("GPL");
4964 MODULE_VERSION(DRV_VERSION
);
4965 MODULE_DESCRIPTION(DRV_DESCRIPTION
", v" DRV_VERSION
);
4966 MODULE_AUTHOR("Thomas Davis, tadavis@lbl.gov and many others");
4967 MODULE_ALIAS_RTNL_LINK("bond");