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 BONDING_DEBUG 1
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>
56 #include <asm/system.h>
59 #include <asm/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/proc_fs.h>
69 #include <linux/seq_file.h>
70 #include <linux/smp.h>
71 #include <linux/if_ether.h>
73 #include <linux/mii.h>
74 #include <linux/ethtool.h>
75 #include <linux/if_vlan.h>
76 #include <linux/if_bonding.h>
77 #include <net/route.h>
82 /*---------------------------- Module parameters ----------------------------*/
84 /* monitor all links that often (in milliseconds). <=0 disables monitoring */
85 #define BOND_LINK_MON_INTERV 0
86 #define BOND_LINK_ARP_INTERV 0
88 static int max_bonds
= BOND_DEFAULT_MAX_BONDS
;
89 static int miimon
= BOND_LINK_MON_INTERV
;
90 static int updelay
= 0;
91 static int downdelay
= 0;
92 static int use_carrier
= 1;
93 static char *mode
= NULL
;
94 static char *primary
= NULL
;
95 static char *lacp_rate
= NULL
;
96 static char *xmit_hash_policy
= NULL
;
97 static int arp_interval
= BOND_LINK_ARP_INTERV
;
98 static char *arp_ip_target
[BOND_MAX_ARP_TARGETS
] = { NULL
, };
99 static char *arp_validate
= NULL
;
100 struct bond_params bonding_defaults
;
102 module_param(max_bonds
, int, 0);
103 MODULE_PARM_DESC(max_bonds
, "Max number of bonded devices");
104 module_param(miimon
, int, 0);
105 MODULE_PARM_DESC(miimon
, "Link check interval in milliseconds");
106 module_param(updelay
, int, 0);
107 MODULE_PARM_DESC(updelay
, "Delay before considering link up, in milliseconds");
108 module_param(downdelay
, int, 0);
109 MODULE_PARM_DESC(downdelay
, "Delay before considering link down, "
111 module_param(use_carrier
, int, 0);
112 MODULE_PARM_DESC(use_carrier
, "Use netif_carrier_ok (vs MII ioctls) in miimon; "
113 "0 for off, 1 for on (default)");
114 module_param(mode
, charp
, 0);
115 MODULE_PARM_DESC(mode
, "Mode of operation : 0 for balance-rr, "
116 "1 for active-backup, 2 for balance-xor, "
117 "3 for broadcast, 4 for 802.3ad, 5 for balance-tlb, "
118 "6 for balance-alb");
119 module_param(primary
, charp
, 0);
120 MODULE_PARM_DESC(primary
, "Primary network device to use");
121 module_param(lacp_rate
, charp
, 0);
122 MODULE_PARM_DESC(lacp_rate
, "LACPDU tx rate to request from 802.3ad partner "
124 module_param(xmit_hash_policy
, charp
, 0);
125 MODULE_PARM_DESC(xmit_hash_policy
, "XOR hashing method: 0 for layer 2 (default)"
126 ", 1 for layer 3+4");
127 module_param(arp_interval
, int, 0);
128 MODULE_PARM_DESC(arp_interval
, "arp interval in milliseconds");
129 module_param_array(arp_ip_target
, charp
, NULL
, 0);
130 MODULE_PARM_DESC(arp_ip_target
, "arp targets in n.n.n.n form");
131 module_param(arp_validate
, charp
, 0);
132 MODULE_PARM_DESC(arp_validate
, "validate src/dst of ARP probes: none (default), active, backup or all");
134 /*----------------------------- Global variables ----------------------------*/
136 static const char * const version
=
137 DRV_DESCRIPTION
": v" DRV_VERSION
" (" DRV_RELDATE
")\n";
139 LIST_HEAD(bond_dev_list
);
141 #ifdef CONFIG_PROC_FS
142 static struct proc_dir_entry
*bond_proc_dir
= NULL
;
145 extern struct rw_semaphore bonding_rwsem
;
146 static u32 arp_target
[BOND_MAX_ARP_TARGETS
] = { 0, } ;
147 static int arp_ip_count
= 0;
148 static int bond_mode
= BOND_MODE_ROUNDROBIN
;
149 static int xmit_hashtype
= BOND_XMIT_POLICY_LAYER2
;
150 static int lacp_fast
= 0;
153 struct bond_parm_tbl bond_lacp_tbl
[] = {
154 { "slow", AD_LACP_SLOW
},
155 { "fast", AD_LACP_FAST
},
159 struct bond_parm_tbl bond_mode_tbl
[] = {
160 { "balance-rr", BOND_MODE_ROUNDROBIN
},
161 { "active-backup", BOND_MODE_ACTIVEBACKUP
},
162 { "balance-xor", BOND_MODE_XOR
},
163 { "broadcast", BOND_MODE_BROADCAST
},
164 { "802.3ad", BOND_MODE_8023AD
},
165 { "balance-tlb", BOND_MODE_TLB
},
166 { "balance-alb", BOND_MODE_ALB
},
170 struct bond_parm_tbl xmit_hashtype_tbl
[] = {
171 { "layer2", BOND_XMIT_POLICY_LAYER2
},
172 { "layer3+4", BOND_XMIT_POLICY_LAYER34
},
176 struct bond_parm_tbl arp_validate_tbl
[] = {
177 { "none", BOND_ARP_VALIDATE_NONE
},
178 { "active", BOND_ARP_VALIDATE_ACTIVE
},
179 { "backup", BOND_ARP_VALIDATE_BACKUP
},
180 { "all", BOND_ARP_VALIDATE_ALL
},
184 /*-------------------------- Forward declarations ---------------------------*/
186 static void bond_send_gratuitous_arp(struct bonding
*bond
);
188 /*---------------------------- General routines -----------------------------*/
190 static const char *bond_mode_name(int mode
)
193 case BOND_MODE_ROUNDROBIN
:
194 return "load balancing (round-robin)";
195 case BOND_MODE_ACTIVEBACKUP
:
196 return "fault-tolerance (active-backup)";
198 return "load balancing (xor)";
199 case BOND_MODE_BROADCAST
:
200 return "fault-tolerance (broadcast)";
201 case BOND_MODE_8023AD
:
202 return "IEEE 802.3ad Dynamic link aggregation";
204 return "transmit load balancing";
206 return "adaptive load balancing";
212 /*---------------------------------- VLAN -----------------------------------*/
215 * bond_add_vlan - add a new vlan id on bond
216 * @bond: bond that got the notification
217 * @vlan_id: the vlan id to add
219 * Returns -ENOMEM if allocation failed.
221 static int bond_add_vlan(struct bonding
*bond
, unsigned short vlan_id
)
223 struct vlan_entry
*vlan
;
225 dprintk("bond: %s, vlan id %d\n",
226 (bond
? bond
->dev
->name
: "None"), vlan_id
);
228 vlan
= kmalloc(sizeof(struct vlan_entry
), GFP_KERNEL
);
233 INIT_LIST_HEAD(&vlan
->vlan_list
);
234 vlan
->vlan_id
= vlan_id
;
237 write_lock_bh(&bond
->lock
);
239 list_add_tail(&vlan
->vlan_list
, &bond
->vlan_list
);
241 write_unlock_bh(&bond
->lock
);
243 dprintk("added VLAN ID %d on bond %s\n", vlan_id
, bond
->dev
->name
);
249 * bond_del_vlan - delete a vlan id from bond
250 * @bond: bond that got the notification
251 * @vlan_id: the vlan id to delete
253 * returns -ENODEV if @vlan_id was not found in @bond.
255 static int bond_del_vlan(struct bonding
*bond
, unsigned short vlan_id
)
257 struct vlan_entry
*vlan
, *next
;
260 dprintk("bond: %s, vlan id %d\n", bond
->dev
->name
, vlan_id
);
262 write_lock_bh(&bond
->lock
);
264 list_for_each_entry_safe(vlan
, next
, &bond
->vlan_list
, vlan_list
) {
265 if (vlan
->vlan_id
== vlan_id
) {
266 list_del(&vlan
->vlan_list
);
268 if ((bond
->params
.mode
== BOND_MODE_TLB
) ||
269 (bond
->params
.mode
== BOND_MODE_ALB
)) {
270 bond_alb_clear_vlan(bond
, vlan_id
);
273 dprintk("removed VLAN ID %d from bond %s\n", vlan_id
,
278 if (list_empty(&bond
->vlan_list
) &&
279 (bond
->slave_cnt
== 0)) {
280 /* Last VLAN removed and no slaves, so
281 * restore block on adding VLANs. This will
282 * be removed once new slaves that are not
283 * VLAN challenged will be added.
285 bond
->dev
->features
|= NETIF_F_VLAN_CHALLENGED
;
293 dprintk("couldn't find VLAN ID %d in bond %s\n", vlan_id
,
297 write_unlock_bh(&bond
->lock
);
302 * bond_has_challenged_slaves
303 * @bond: the bond we're working on
305 * Searches the slave list. Returns 1 if a vlan challenged slave
306 * was found, 0 otherwise.
308 * Assumes bond->lock is held.
310 static int bond_has_challenged_slaves(struct bonding
*bond
)
315 bond_for_each_slave(bond
, slave
, i
) {
316 if (slave
->dev
->features
& NETIF_F_VLAN_CHALLENGED
) {
317 dprintk("found VLAN challenged slave - %s\n",
323 dprintk("no VLAN challenged slaves found\n");
328 * bond_next_vlan - safely skip to the next item in the vlans list.
329 * @bond: the bond we're working on
330 * @curr: item we're advancing from
332 * Returns %NULL if list is empty, bond->next_vlan if @curr is %NULL,
333 * or @curr->next otherwise (even if it is @curr itself again).
335 * Caller must hold bond->lock
337 struct vlan_entry
*bond_next_vlan(struct bonding
*bond
, struct vlan_entry
*curr
)
339 struct vlan_entry
*next
, *last
;
341 if (list_empty(&bond
->vlan_list
)) {
346 next
= list_entry(bond
->vlan_list
.next
,
347 struct vlan_entry
, vlan_list
);
349 last
= list_entry(bond
->vlan_list
.prev
,
350 struct vlan_entry
, vlan_list
);
352 next
= list_entry(bond
->vlan_list
.next
,
353 struct vlan_entry
, vlan_list
);
355 next
= list_entry(curr
->vlan_list
.next
,
356 struct vlan_entry
, vlan_list
);
364 * bond_dev_queue_xmit - Prepare skb for xmit.
366 * @bond: bond device that got this skb for tx.
367 * @skb: hw accel VLAN tagged skb to transmit
368 * @slave_dev: slave that is supposed to xmit this skbuff
370 * When the bond gets an skb to transmit that is
371 * already hardware accelerated VLAN tagged, and it
372 * needs to relay this skb to a slave that is not
373 * hw accel capable, the skb needs to be "unaccelerated",
374 * i.e. strip the hwaccel tag and re-insert it as part
377 int bond_dev_queue_xmit(struct bonding
*bond
, struct sk_buff
*skb
, struct net_device
*slave_dev
)
379 unsigned short vlan_id
;
381 if (!list_empty(&bond
->vlan_list
) &&
382 !(slave_dev
->features
& NETIF_F_HW_VLAN_TX
) &&
383 vlan_get_tag(skb
, &vlan_id
) == 0) {
384 skb
->dev
= slave_dev
;
385 skb
= vlan_put_tag(skb
, vlan_id
);
387 /* vlan_put_tag() frees the skb in case of error,
388 * so return success here so the calling functions
389 * won't attempt to free is again.
394 skb
->dev
= slave_dev
;
404 * In the following 3 functions, bond_vlan_rx_register(), bond_vlan_rx_add_vid
405 * and bond_vlan_rx_kill_vid, We don't protect the slave list iteration with a
407 * a. This operation is performed in IOCTL context,
408 * b. The operation is protected by the RTNL semaphore in the 8021q code,
409 * c. Holding a lock with BH disabled while directly calling a base driver
410 * entry point is generally a BAD idea.
412 * The design of synchronization/protection for this operation in the 8021q
413 * module is good for one or more VLAN devices over a single physical device
414 * and cannot be extended for a teaming solution like bonding, so there is a
415 * potential race condition here where a net device from the vlan group might
416 * be referenced (either by a base driver or the 8021q code) while it is being
417 * removed from the system. However, it turns out we're not making matters
418 * worse, and if it works for regular VLAN usage it will work here too.
422 * bond_vlan_rx_register - Propagates registration to slaves
423 * @bond_dev: bonding net device that got called
424 * @grp: vlan group being registered
426 static void bond_vlan_rx_register(struct net_device
*bond_dev
, struct vlan_group
*grp
)
428 struct bonding
*bond
= bond_dev
->priv
;
434 bond_for_each_slave(bond
, slave
, i
) {
435 struct net_device
*slave_dev
= slave
->dev
;
437 if ((slave_dev
->features
& NETIF_F_HW_VLAN_RX
) &&
438 slave_dev
->vlan_rx_register
) {
439 slave_dev
->vlan_rx_register(slave_dev
, grp
);
445 * bond_vlan_rx_add_vid - Propagates adding an id to slaves
446 * @bond_dev: bonding net device that got called
447 * @vid: vlan id being added
449 static void bond_vlan_rx_add_vid(struct net_device
*bond_dev
, uint16_t vid
)
451 struct bonding
*bond
= bond_dev
->priv
;
455 bond_for_each_slave(bond
, slave
, i
) {
456 struct net_device
*slave_dev
= slave
->dev
;
458 if ((slave_dev
->features
& NETIF_F_HW_VLAN_FILTER
) &&
459 slave_dev
->vlan_rx_add_vid
) {
460 slave_dev
->vlan_rx_add_vid(slave_dev
, vid
);
464 res
= bond_add_vlan(bond
, vid
);
466 printk(KERN_ERR DRV_NAME
467 ": %s: Error: Failed to add vlan id %d\n",
468 bond_dev
->name
, vid
);
473 * bond_vlan_rx_kill_vid - Propagates deleting an id to slaves
474 * @bond_dev: bonding net device that got called
475 * @vid: vlan id being removed
477 static void bond_vlan_rx_kill_vid(struct net_device
*bond_dev
, uint16_t vid
)
479 struct bonding
*bond
= bond_dev
->priv
;
481 struct net_device
*vlan_dev
;
484 bond_for_each_slave(bond
, slave
, i
) {
485 struct net_device
*slave_dev
= slave
->dev
;
487 if ((slave_dev
->features
& NETIF_F_HW_VLAN_FILTER
) &&
488 slave_dev
->vlan_rx_kill_vid
) {
489 /* Save and then restore vlan_dev in the grp array,
490 * since the slave's driver might clear it.
492 vlan_dev
= vlan_group_get_device(bond
->vlgrp
, vid
);
493 slave_dev
->vlan_rx_kill_vid(slave_dev
, vid
);
494 vlan_group_set_device(bond
->vlgrp
, vid
, vlan_dev
);
498 res
= bond_del_vlan(bond
, vid
);
500 printk(KERN_ERR DRV_NAME
501 ": %s: Error: Failed to remove vlan id %d\n",
502 bond_dev
->name
, vid
);
506 static void bond_add_vlans_on_slave(struct bonding
*bond
, struct net_device
*slave_dev
)
508 struct vlan_entry
*vlan
;
510 write_lock_bh(&bond
->lock
);
512 if (list_empty(&bond
->vlan_list
)) {
516 if ((slave_dev
->features
& NETIF_F_HW_VLAN_RX
) &&
517 slave_dev
->vlan_rx_register
) {
518 slave_dev
->vlan_rx_register(slave_dev
, bond
->vlgrp
);
521 if (!(slave_dev
->features
& NETIF_F_HW_VLAN_FILTER
) ||
522 !(slave_dev
->vlan_rx_add_vid
)) {
526 list_for_each_entry(vlan
, &bond
->vlan_list
, vlan_list
) {
527 slave_dev
->vlan_rx_add_vid(slave_dev
, vlan
->vlan_id
);
531 write_unlock_bh(&bond
->lock
);
534 static void bond_del_vlans_from_slave(struct bonding
*bond
, struct net_device
*slave_dev
)
536 struct vlan_entry
*vlan
;
537 struct net_device
*vlan_dev
;
539 write_lock_bh(&bond
->lock
);
541 if (list_empty(&bond
->vlan_list
)) {
545 if (!(slave_dev
->features
& NETIF_F_HW_VLAN_FILTER
) ||
546 !(slave_dev
->vlan_rx_kill_vid
)) {
550 list_for_each_entry(vlan
, &bond
->vlan_list
, vlan_list
) {
551 /* Save and then restore vlan_dev in the grp array,
552 * since the slave's driver might clear it.
554 vlan_dev
= vlan_group_get_device(bond
->vlgrp
, vlan
->vlan_id
);
555 slave_dev
->vlan_rx_kill_vid(slave_dev
, vlan
->vlan_id
);
556 vlan_group_set_device(bond
->vlgrp
, vlan
->vlan_id
, vlan_dev
);
560 if ((slave_dev
->features
& NETIF_F_HW_VLAN_RX
) &&
561 slave_dev
->vlan_rx_register
) {
562 slave_dev
->vlan_rx_register(slave_dev
, NULL
);
566 write_unlock_bh(&bond
->lock
);
569 /*------------------------------- Link status -------------------------------*/
572 * Set the carrier state for the master according to the state of its
573 * slaves. If any slaves are up, the master is up. In 802.3ad mode,
574 * do special 802.3ad magic.
576 * Returns zero if carrier state does not change, nonzero if it does.
578 static int bond_set_carrier(struct bonding
*bond
)
583 if (bond
->slave_cnt
== 0)
586 if (bond
->params
.mode
== BOND_MODE_8023AD
)
587 return bond_3ad_set_carrier(bond
);
589 bond_for_each_slave(bond
, slave
, i
) {
590 if (slave
->link
== BOND_LINK_UP
) {
591 if (!netif_carrier_ok(bond
->dev
)) {
592 netif_carrier_on(bond
->dev
);
600 if (netif_carrier_ok(bond
->dev
)) {
601 netif_carrier_off(bond
->dev
);
608 * Get link speed and duplex from the slave's base driver
609 * using ethtool. If for some reason the call fails or the
610 * values are invalid, fake speed and duplex to 100/Full
613 static int bond_update_speed_duplex(struct slave
*slave
)
615 struct net_device
*slave_dev
= slave
->dev
;
616 struct ethtool_cmd etool
;
619 /* Fake speed and duplex */
620 slave
->speed
= SPEED_100
;
621 slave
->duplex
= DUPLEX_FULL
;
623 if (!slave_dev
->ethtool_ops
|| !slave_dev
->ethtool_ops
->get_settings
)
626 res
= slave_dev
->ethtool_ops
->get_settings(slave_dev
, &etool
);
630 switch (etool
.speed
) {
640 switch (etool
.duplex
) {
648 slave
->speed
= etool
.speed
;
649 slave
->duplex
= etool
.duplex
;
655 * if <dev> supports MII link status reporting, check its link status.
657 * We either do MII/ETHTOOL ioctls, or check netif_carrier_ok(),
658 * depening upon the setting of the use_carrier parameter.
660 * Return either BMSR_LSTATUS, meaning that the link is up (or we
661 * can't tell and just pretend it is), or 0, meaning that the link is
664 * If reporting is non-zero, instead of faking link up, return -1 if
665 * both ETHTOOL and MII ioctls fail (meaning the device does not
666 * support them). If use_carrier is set, return whatever it says.
667 * It'd be nice if there was a good way to tell if a driver supports
668 * netif_carrier, but there really isn't.
670 static int bond_check_dev_link(struct bonding
*bond
, struct net_device
*slave_dev
, int reporting
)
672 static int (* ioctl
)(struct net_device
*, struct ifreq
*, int);
674 struct mii_ioctl_data
*mii
;
676 if (bond
->params
.use_carrier
) {
677 return netif_carrier_ok(slave_dev
) ? BMSR_LSTATUS
: 0;
680 ioctl
= slave_dev
->do_ioctl
;
682 /* TODO: set pointer to correct ioctl on a per team member */
683 /* bases to make this more efficient. that is, once */
684 /* we determine the correct ioctl, we will always */
685 /* call it and not the others for that team */
689 * We cannot assume that SIOCGMIIPHY will also read a
690 * register; not all network drivers (e.g., e100)
694 /* Yes, the mii is overlaid on the ifreq.ifr_ifru */
695 strncpy(ifr
.ifr_name
, slave_dev
->name
, IFNAMSIZ
);
697 if (IOCTL(slave_dev
, &ifr
, SIOCGMIIPHY
) == 0) {
698 mii
->reg_num
= MII_BMSR
;
699 if (IOCTL(slave_dev
, &ifr
, SIOCGMIIREG
) == 0) {
700 return (mii
->val_out
& BMSR_LSTATUS
);
706 * Some drivers cache ETHTOOL_GLINK for a period of time so we only
707 * attempt to get link status from it if the above MII ioctls fail.
709 if (slave_dev
->ethtool_ops
) {
710 if (slave_dev
->ethtool_ops
->get_link
) {
713 link
= slave_dev
->ethtool_ops
->get_link(slave_dev
);
715 return link
? BMSR_LSTATUS
: 0;
720 * If reporting, report that either there's no dev->do_ioctl,
721 * or both SIOCGMIIREG and get_link failed (meaning that we
722 * cannot report link status). If not reporting, pretend
725 return (reporting
? -1 : BMSR_LSTATUS
);
728 /*----------------------------- Multicast list ------------------------------*/
731 * Returns 0 if dmi1 and dmi2 are the same, non-0 otherwise
733 static inline int bond_is_dmi_same(struct dev_mc_list
*dmi1
, struct dev_mc_list
*dmi2
)
735 return memcmp(dmi1
->dmi_addr
, dmi2
->dmi_addr
, dmi1
->dmi_addrlen
) == 0 &&
736 dmi1
->dmi_addrlen
== dmi2
->dmi_addrlen
;
740 * returns dmi entry if found, NULL otherwise
742 static struct dev_mc_list
*bond_mc_list_find_dmi(struct dev_mc_list
*dmi
, struct dev_mc_list
*mc_list
)
744 struct dev_mc_list
*idmi
;
746 for (idmi
= mc_list
; idmi
; idmi
= idmi
->next
) {
747 if (bond_is_dmi_same(dmi
, idmi
)) {
756 * Push the promiscuity flag down to appropriate slaves
758 static void bond_set_promiscuity(struct bonding
*bond
, int inc
)
760 if (USES_PRIMARY(bond
->params
.mode
)) {
761 /* write lock already acquired */
762 if (bond
->curr_active_slave
) {
763 dev_set_promiscuity(bond
->curr_active_slave
->dev
, inc
);
768 bond_for_each_slave(bond
, slave
, i
) {
769 dev_set_promiscuity(slave
->dev
, inc
);
775 * Push the allmulti flag down to all slaves
777 static void bond_set_allmulti(struct bonding
*bond
, int inc
)
779 if (USES_PRIMARY(bond
->params
.mode
)) {
780 /* write lock already acquired */
781 if (bond
->curr_active_slave
) {
782 dev_set_allmulti(bond
->curr_active_slave
->dev
, inc
);
787 bond_for_each_slave(bond
, slave
, i
) {
788 dev_set_allmulti(slave
->dev
, inc
);
794 * Add a Multicast address to slaves
797 static void bond_mc_add(struct bonding
*bond
, void *addr
, int alen
)
799 if (USES_PRIMARY(bond
->params
.mode
)) {
800 /* write lock already acquired */
801 if (bond
->curr_active_slave
) {
802 dev_mc_add(bond
->curr_active_slave
->dev
, addr
, alen
, 0);
807 bond_for_each_slave(bond
, slave
, i
) {
808 dev_mc_add(slave
->dev
, addr
, alen
, 0);
814 * Remove a multicast address from slave
817 static void bond_mc_delete(struct bonding
*bond
, void *addr
, int alen
)
819 if (USES_PRIMARY(bond
->params
.mode
)) {
820 /* write lock already acquired */
821 if (bond
->curr_active_slave
) {
822 dev_mc_delete(bond
->curr_active_slave
->dev
, addr
, alen
, 0);
827 bond_for_each_slave(bond
, slave
, i
) {
828 dev_mc_delete(slave
->dev
, addr
, alen
, 0);
835 * Retrieve the list of registered multicast addresses for the bonding
836 * device and retransmit an IGMP JOIN request to the current active
839 static void bond_resend_igmp_join_requests(struct bonding
*bond
)
841 struct in_device
*in_dev
;
842 struct ip_mc_list
*im
;
845 in_dev
= __in_dev_get_rcu(bond
->dev
);
847 for (im
= in_dev
->mc_list
; im
; im
= im
->next
) {
848 ip_mc_rejoin_group(im
);
856 * Totally destroys the mc_list in bond
858 static void bond_mc_list_destroy(struct bonding
*bond
)
860 struct dev_mc_list
*dmi
;
864 bond
->mc_list
= dmi
->next
;
868 bond
->mc_list
= NULL
;
872 * Copy all the Multicast addresses from src to the bonding device dst
874 static int bond_mc_list_copy(struct dev_mc_list
*mc_list
, struct bonding
*bond
,
877 struct dev_mc_list
*dmi
, *new_dmi
;
879 for (dmi
= mc_list
; dmi
; dmi
= dmi
->next
) {
880 new_dmi
= kmalloc(sizeof(struct dev_mc_list
), gfp_flag
);
883 /* FIXME: Potential memory leak !!! */
887 new_dmi
->next
= bond
->mc_list
;
888 bond
->mc_list
= new_dmi
;
889 new_dmi
->dmi_addrlen
= dmi
->dmi_addrlen
;
890 memcpy(new_dmi
->dmi_addr
, dmi
->dmi_addr
, dmi
->dmi_addrlen
);
891 new_dmi
->dmi_users
= dmi
->dmi_users
;
892 new_dmi
->dmi_gusers
= dmi
->dmi_gusers
;
899 * flush all members of flush->mc_list from device dev->mc_list
901 static void bond_mc_list_flush(struct net_device
*bond_dev
, struct net_device
*slave_dev
)
903 struct bonding
*bond
= bond_dev
->priv
;
904 struct dev_mc_list
*dmi
;
906 for (dmi
= bond_dev
->mc_list
; dmi
; dmi
= dmi
->next
) {
907 dev_mc_delete(slave_dev
, dmi
->dmi_addr
, dmi
->dmi_addrlen
, 0);
910 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
911 /* del lacpdu mc addr from mc list */
912 u8 lacpdu_multicast
[ETH_ALEN
] = MULTICAST_LACPDU_ADDR
;
914 dev_mc_delete(slave_dev
, lacpdu_multicast
, ETH_ALEN
, 0);
918 /*--------------------------- Active slave change ---------------------------*/
921 * Update the mc list and multicast-related flags for the new and
922 * old active slaves (if any) according to the multicast mode, and
923 * promiscuous flags unconditionally.
925 static void bond_mc_swap(struct bonding
*bond
, struct slave
*new_active
, struct slave
*old_active
)
927 struct dev_mc_list
*dmi
;
929 if (!USES_PRIMARY(bond
->params
.mode
)) {
930 /* nothing to do - mc list is already up-to-date on
937 if (bond
->dev
->flags
& IFF_PROMISC
) {
938 dev_set_promiscuity(old_active
->dev
, -1);
941 if (bond
->dev
->flags
& IFF_ALLMULTI
) {
942 dev_set_allmulti(old_active
->dev
, -1);
945 for (dmi
= bond
->dev
->mc_list
; dmi
; dmi
= dmi
->next
) {
946 dev_mc_delete(old_active
->dev
, dmi
->dmi_addr
, dmi
->dmi_addrlen
, 0);
951 if (bond
->dev
->flags
& IFF_PROMISC
) {
952 dev_set_promiscuity(new_active
->dev
, 1);
955 if (bond
->dev
->flags
& IFF_ALLMULTI
) {
956 dev_set_allmulti(new_active
->dev
, 1);
959 for (dmi
= bond
->dev
->mc_list
; dmi
; dmi
= dmi
->next
) {
960 dev_mc_add(new_active
->dev
, dmi
->dmi_addr
, dmi
->dmi_addrlen
, 0);
962 bond_resend_igmp_join_requests(bond
);
967 * find_best_interface - select the best available slave to be the active one
968 * @bond: our bonding struct
970 * Warning: Caller must hold curr_slave_lock for writing.
972 static struct slave
*bond_find_best_slave(struct bonding
*bond
)
974 struct slave
*new_active
, *old_active
;
975 struct slave
*bestslave
= NULL
;
976 int mintime
= bond
->params
.updelay
;
979 new_active
= old_active
= bond
->curr_active_slave
;
981 if (!new_active
) { /* there were no active slaves left */
982 if (bond
->slave_cnt
> 0) { /* found one slave */
983 new_active
= bond
->first_slave
;
985 return NULL
; /* still no slave, return NULL */
989 /* first try the primary link; if arping, a link must tx/rx traffic
990 * before it can be considered the curr_active_slave - also, we would skip
991 * slaves between the curr_active_slave and primary_slave that may be up
994 if ((bond
->primary_slave
) &&
995 (!bond
->params
.arp_interval
) &&
996 (IS_UP(bond
->primary_slave
->dev
))) {
997 new_active
= bond
->primary_slave
;
1000 /* remember where to stop iterating over the slaves */
1001 old_active
= new_active
;
1003 bond_for_each_slave_from(bond
, new_active
, i
, old_active
) {
1004 if (IS_UP(new_active
->dev
)) {
1005 if (new_active
->link
== BOND_LINK_UP
) {
1007 } else if (new_active
->link
== BOND_LINK_BACK
) {
1008 /* link up, but waiting for stabilization */
1009 if (new_active
->delay
< mintime
) {
1010 mintime
= new_active
->delay
;
1011 bestslave
= new_active
;
1021 * change_active_interface - change the active slave into the specified one
1022 * @bond: our bonding struct
1023 * @new: the new slave to make the active one
1025 * Set the new slave to the bond's settings and unset them on the old
1026 * curr_active_slave.
1027 * Setting include flags, mc-list, promiscuity, allmulti, etc.
1029 * If @new's link state is %BOND_LINK_BACK we'll set it to %BOND_LINK_UP,
1030 * because it is apparently the best available slave we have, even though its
1031 * updelay hasn't timed out yet.
1033 * Warning: Caller must hold curr_slave_lock for writing.
1035 void bond_change_active_slave(struct bonding
*bond
, struct slave
*new_active
)
1037 struct slave
*old_active
= bond
->curr_active_slave
;
1039 if (old_active
== new_active
) {
1044 if (new_active
->link
== BOND_LINK_BACK
) {
1045 if (USES_PRIMARY(bond
->params
.mode
)) {
1046 printk(KERN_INFO DRV_NAME
1047 ": %s: making interface %s the new "
1048 "active one %d ms earlier.\n",
1049 bond
->dev
->name
, new_active
->dev
->name
,
1050 (bond
->params
.updelay
- new_active
->delay
) * bond
->params
.miimon
);
1053 new_active
->delay
= 0;
1054 new_active
->link
= BOND_LINK_UP
;
1055 new_active
->jiffies
= jiffies
;
1057 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
1058 bond_3ad_handle_link_change(new_active
, BOND_LINK_UP
);
1061 if ((bond
->params
.mode
== BOND_MODE_TLB
) ||
1062 (bond
->params
.mode
== BOND_MODE_ALB
)) {
1063 bond_alb_handle_link_change(bond
, new_active
, BOND_LINK_UP
);
1066 if (USES_PRIMARY(bond
->params
.mode
)) {
1067 printk(KERN_INFO DRV_NAME
1068 ": %s: making interface %s the new "
1070 bond
->dev
->name
, new_active
->dev
->name
);
1075 if (USES_PRIMARY(bond
->params
.mode
)) {
1076 bond_mc_swap(bond
, new_active
, old_active
);
1079 if ((bond
->params
.mode
== BOND_MODE_TLB
) ||
1080 (bond
->params
.mode
== BOND_MODE_ALB
)) {
1081 bond_alb_handle_active_change(bond
, new_active
);
1083 bond_set_slave_inactive_flags(old_active
);
1085 bond_set_slave_active_flags(new_active
);
1087 bond
->curr_active_slave
= new_active
;
1090 if (bond
->params
.mode
== BOND_MODE_ACTIVEBACKUP
) {
1092 bond_set_slave_inactive_flags(old_active
);
1096 bond_set_slave_active_flags(new_active
);
1098 bond_send_gratuitous_arp(bond
);
1103 * bond_select_active_slave - select a new active slave, if needed
1104 * @bond: our bonding struct
1106 * This functions shoud be called when one of the following occurs:
1107 * - The old curr_active_slave has been released or lost its link.
1108 * - The primary_slave has got its link back.
1109 * - A slave has got its link back and there's no old curr_active_slave.
1111 * Warning: Caller must hold curr_slave_lock for writing.
1113 void bond_select_active_slave(struct bonding
*bond
)
1115 struct slave
*best_slave
;
1118 best_slave
= bond_find_best_slave(bond
);
1119 if (best_slave
!= bond
->curr_active_slave
) {
1120 bond_change_active_slave(bond
, best_slave
);
1121 rv
= bond_set_carrier(bond
);
1125 if (netif_carrier_ok(bond
->dev
)) {
1126 printk(KERN_INFO DRV_NAME
1127 ": %s: first active interface up!\n",
1130 printk(KERN_INFO DRV_NAME
": %s: "
1131 "now running without any active interface !\n",
1137 /*--------------------------- slave list handling ---------------------------*/
1140 * This function attaches the slave to the end of list.
1142 * bond->lock held for writing by caller.
1144 static void bond_attach_slave(struct bonding
*bond
, struct slave
*new_slave
)
1146 if (bond
->first_slave
== NULL
) { /* attaching the first slave */
1147 new_slave
->next
= new_slave
;
1148 new_slave
->prev
= new_slave
;
1149 bond
->first_slave
= new_slave
;
1151 new_slave
->next
= bond
->first_slave
;
1152 new_slave
->prev
= bond
->first_slave
->prev
;
1153 new_slave
->next
->prev
= new_slave
;
1154 new_slave
->prev
->next
= new_slave
;
1161 * This function detaches the slave from the list.
1162 * WARNING: no check is made to verify if the slave effectively
1163 * belongs to <bond>.
1164 * Nothing is freed on return, structures are just unchained.
1165 * If any slave pointer in bond was pointing to <slave>,
1166 * it should be changed by the calling function.
1168 * bond->lock held for writing by caller.
1170 static void bond_detach_slave(struct bonding
*bond
, struct slave
*slave
)
1173 slave
->next
->prev
= slave
->prev
;
1177 slave
->prev
->next
= slave
->next
;
1180 if (bond
->first_slave
== slave
) { /* slave is the first slave */
1181 if (bond
->slave_cnt
> 1) { /* there are more slave */
1182 bond
->first_slave
= slave
->next
;
1184 bond
->first_slave
= NULL
; /* slave was the last one */
1193 /*---------------------------------- IOCTL ----------------------------------*/
1195 static int bond_sethwaddr(struct net_device
*bond_dev
,
1196 struct net_device
*slave_dev
)
1198 dprintk("bond_dev=%p\n", bond_dev
);
1199 dprintk("slave_dev=%p\n", slave_dev
);
1200 dprintk("slave_dev->addr_len=%d\n", slave_dev
->addr_len
);
1201 memcpy(bond_dev
->dev_addr
, slave_dev
->dev_addr
, slave_dev
->addr_len
);
1205 #define BOND_INTERSECT_FEATURES \
1206 (NETIF_F_SG | NETIF_F_ALL_CSUM | NETIF_F_TSO | NETIF_F_UFO)
1209 * Compute the common dev->feature set available to all slaves. Some
1210 * feature bits are managed elsewhere, so preserve feature bits set on
1211 * master device that are not part of the examined set.
1213 static int bond_compute_features(struct bonding
*bond
)
1215 unsigned long features
= BOND_INTERSECT_FEATURES
;
1216 struct slave
*slave
;
1217 struct net_device
*bond_dev
= bond
->dev
;
1218 unsigned short max_hard_header_len
= ETH_HLEN
;
1221 bond_for_each_slave(bond
, slave
, i
) {
1222 features
&= (slave
->dev
->features
& BOND_INTERSECT_FEATURES
);
1223 if (slave
->dev
->hard_header_len
> max_hard_header_len
)
1224 max_hard_header_len
= slave
->dev
->hard_header_len
;
1227 if ((features
& NETIF_F_SG
) &&
1228 !(features
& NETIF_F_ALL_CSUM
))
1229 features
&= ~NETIF_F_SG
;
1232 * features will include NETIF_F_TSO (NETIF_F_UFO) iff all
1233 * slave devices support NETIF_F_TSO (NETIF_F_UFO), which
1234 * implies that all slaves also support scatter-gather
1235 * (NETIF_F_SG), which implies that features also includes
1236 * NETIF_F_SG. So no need to check whether we have an
1237 * illegal combination of NETIF_F_{TSO,UFO} and
1241 features
|= (bond_dev
->features
& ~BOND_INTERSECT_FEATURES
);
1242 bond_dev
->features
= features
;
1243 bond_dev
->hard_header_len
= max_hard_header_len
;
1248 /* enslave device <slave> to bond device <master> */
1249 int bond_enslave(struct net_device
*bond_dev
, struct net_device
*slave_dev
)
1251 struct bonding
*bond
= bond_dev
->priv
;
1252 struct slave
*new_slave
= NULL
;
1253 struct dev_mc_list
*dmi
;
1254 struct sockaddr addr
;
1256 int old_features
= bond_dev
->features
;
1259 if (!bond
->params
.use_carrier
&& slave_dev
->ethtool_ops
== NULL
&&
1260 slave_dev
->do_ioctl
== NULL
) {
1261 printk(KERN_WARNING DRV_NAME
1262 ": %s: Warning: no link monitoring support for %s\n",
1263 bond_dev
->name
, slave_dev
->name
);
1266 /* bond must be initialized by bond_open() before enslaving */
1267 if (!(bond_dev
->flags
& IFF_UP
)) {
1268 dprintk("Error, master_dev is not up\n");
1272 /* already enslaved */
1273 if (slave_dev
->flags
& IFF_SLAVE
) {
1274 dprintk("Error, Device was already enslaved\n");
1278 /* vlan challenged mutual exclusion */
1279 /* no need to lock since we're protected by rtnl_lock */
1280 if (slave_dev
->features
& NETIF_F_VLAN_CHALLENGED
) {
1281 dprintk("%s: NETIF_F_VLAN_CHALLENGED\n", slave_dev
->name
);
1282 if (!list_empty(&bond
->vlan_list
)) {
1283 printk(KERN_ERR DRV_NAME
1284 ": %s: Error: cannot enslave VLAN "
1285 "challenged slave %s on VLAN enabled "
1286 "bond %s\n", bond_dev
->name
, slave_dev
->name
,
1290 printk(KERN_WARNING DRV_NAME
1291 ": %s: Warning: enslaved VLAN challenged "
1292 "slave %s. Adding VLANs will be blocked as "
1293 "long as %s is part of bond %s\n",
1294 bond_dev
->name
, slave_dev
->name
, slave_dev
->name
,
1296 bond_dev
->features
|= NETIF_F_VLAN_CHALLENGED
;
1299 dprintk("%s: ! NETIF_F_VLAN_CHALLENGED\n", slave_dev
->name
);
1300 if (bond
->slave_cnt
== 0) {
1301 /* First slave, and it is not VLAN challenged,
1302 * so remove the block of adding VLANs over the bond.
1304 bond_dev
->features
&= ~NETIF_F_VLAN_CHALLENGED
;
1309 * Old ifenslave binaries are no longer supported. These can
1310 * be identified with moderate accurary by the state of the slave:
1311 * the current ifenslave will set the interface down prior to
1312 * enslaving it; the old ifenslave will not.
1314 if ((slave_dev
->flags
& IFF_UP
)) {
1315 printk(KERN_ERR DRV_NAME
": %s is up. "
1316 "This may be due to an out of date ifenslave.\n",
1319 goto err_undo_flags
;
1322 if (slave_dev
->set_mac_address
== NULL
) {
1323 printk(KERN_ERR DRV_NAME
1324 ": %s: Error: The slave device you specified does "
1325 "not support setting the MAC address. "
1326 "Your kernel likely does not support slave "
1327 "devices.\n", bond_dev
->name
);
1329 goto err_undo_flags
;
1332 new_slave
= kzalloc(sizeof(struct slave
), GFP_KERNEL
);
1335 goto err_undo_flags
;
1338 /* save slave's original flags before calling
1339 * netdev_set_master and dev_open
1341 new_slave
->original_flags
= slave_dev
->flags
;
1344 * Save slave's original ("permanent") mac address for modes
1345 * that need it, and for restoring it upon release, and then
1346 * set it to the master's address
1348 memcpy(new_slave
->perm_hwaddr
, slave_dev
->dev_addr
, ETH_ALEN
);
1351 * Set slave to master's mac address. The application already
1352 * set the master's mac address to that of the first slave
1354 memcpy(addr
.sa_data
, bond_dev
->dev_addr
, bond_dev
->addr_len
);
1355 addr
.sa_family
= slave_dev
->type
;
1356 res
= dev_set_mac_address(slave_dev
, &addr
);
1358 dprintk("Error %d calling set_mac_address\n", res
);
1362 res
= netdev_set_master(slave_dev
, bond_dev
);
1364 dprintk("Error %d calling netdev_set_master\n", res
);
1367 /* open the slave since the application closed it */
1368 res
= dev_open(slave_dev
);
1370 dprintk("Openning slave %s failed\n", slave_dev
->name
);
1371 goto err_restore_mac
;
1374 new_slave
->dev
= slave_dev
;
1375 slave_dev
->priv_flags
|= IFF_BONDING
;
1377 if ((bond
->params
.mode
== BOND_MODE_TLB
) ||
1378 (bond
->params
.mode
== BOND_MODE_ALB
)) {
1379 /* bond_alb_init_slave() must be called before all other stages since
1380 * it might fail and we do not want to have to undo everything
1382 res
= bond_alb_init_slave(bond
, new_slave
);
1384 goto err_unset_master
;
1388 /* If the mode USES_PRIMARY, then the new slave gets the
1389 * master's promisc (and mc) settings only if it becomes the
1390 * curr_active_slave, and that is taken care of later when calling
1391 * bond_change_active()
1393 if (!USES_PRIMARY(bond
->params
.mode
)) {
1394 /* set promiscuity level to new slave */
1395 if (bond_dev
->flags
& IFF_PROMISC
) {
1396 dev_set_promiscuity(slave_dev
, 1);
1399 /* set allmulti level to new slave */
1400 if (bond_dev
->flags
& IFF_ALLMULTI
) {
1401 dev_set_allmulti(slave_dev
, 1);
1404 /* upload master's mc_list to new slave */
1405 for (dmi
= bond_dev
->mc_list
; dmi
; dmi
= dmi
->next
) {
1406 dev_mc_add (slave_dev
, dmi
->dmi_addr
, dmi
->dmi_addrlen
, 0);
1410 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
1411 /* add lacpdu mc addr to mc list */
1412 u8 lacpdu_multicast
[ETH_ALEN
] = MULTICAST_LACPDU_ADDR
;
1414 dev_mc_add(slave_dev
, lacpdu_multicast
, ETH_ALEN
, 0);
1417 bond_add_vlans_on_slave(bond
, slave_dev
);
1419 write_lock_bh(&bond
->lock
);
1421 bond_attach_slave(bond
, new_slave
);
1423 new_slave
->delay
= 0;
1424 new_slave
->link_failure_count
= 0;
1426 bond_compute_features(bond
);
1428 new_slave
->last_arp_rx
= jiffies
;
1430 if (bond
->params
.miimon
&& !bond
->params
.use_carrier
) {
1431 link_reporting
= bond_check_dev_link(bond
, slave_dev
, 1);
1433 if ((link_reporting
== -1) && !bond
->params
.arp_interval
) {
1435 * miimon is set but a bonded network driver
1436 * does not support ETHTOOL/MII and
1437 * arp_interval is not set. Note: if
1438 * use_carrier is enabled, we will never go
1439 * here (because netif_carrier is always
1440 * supported); thus, we don't need to change
1441 * the messages for netif_carrier.
1443 printk(KERN_WARNING DRV_NAME
1444 ": %s: Warning: MII and ETHTOOL support not "
1445 "available for interface %s, and "
1446 "arp_interval/arp_ip_target module parameters "
1447 "not specified, thus bonding will not detect "
1448 "link failures! see bonding.txt for details.\n",
1449 bond_dev
->name
, slave_dev
->name
);
1450 } else if (link_reporting
== -1) {
1451 /* unable get link status using mii/ethtool */
1452 printk(KERN_WARNING DRV_NAME
1453 ": %s: Warning: can't get link status from "
1454 "interface %s; the network driver associated "
1455 "with this interface does not support MII or "
1456 "ETHTOOL link status reporting, thus miimon "
1457 "has no effect on this interface.\n",
1458 bond_dev
->name
, slave_dev
->name
);
1462 /* check for initial state */
1463 if (!bond
->params
.miimon
||
1464 (bond_check_dev_link(bond
, slave_dev
, 0) == BMSR_LSTATUS
)) {
1465 if (bond
->params
.updelay
) {
1466 dprintk("Initial state of slave_dev is "
1467 "BOND_LINK_BACK\n");
1468 new_slave
->link
= BOND_LINK_BACK
;
1469 new_slave
->delay
= bond
->params
.updelay
;
1471 dprintk("Initial state of slave_dev is "
1473 new_slave
->link
= BOND_LINK_UP
;
1475 new_slave
->jiffies
= jiffies
;
1477 dprintk("Initial state of slave_dev is "
1478 "BOND_LINK_DOWN\n");
1479 new_slave
->link
= BOND_LINK_DOWN
;
1482 if (bond_update_speed_duplex(new_slave
) &&
1483 (new_slave
->link
!= BOND_LINK_DOWN
)) {
1484 printk(KERN_WARNING DRV_NAME
1485 ": %s: Warning: failed to get speed and duplex from %s, "
1486 "assumed to be 100Mb/sec and Full.\n",
1487 bond_dev
->name
, new_slave
->dev
->name
);
1489 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
1490 printk(KERN_WARNING DRV_NAME
1491 ": %s: Warning: Operation of 802.3ad mode requires ETHTOOL "
1492 "support in base driver for proper aggregator "
1493 "selection.\n", bond_dev
->name
);
1497 if (USES_PRIMARY(bond
->params
.mode
) && bond
->params
.primary
[0]) {
1498 /* if there is a primary slave, remember it */
1499 if (strcmp(bond
->params
.primary
, new_slave
->dev
->name
) == 0) {
1500 bond
->primary_slave
= new_slave
;
1504 switch (bond
->params
.mode
) {
1505 case BOND_MODE_ACTIVEBACKUP
:
1506 bond_set_slave_inactive_flags(new_slave
);
1507 bond_select_active_slave(bond
);
1509 case BOND_MODE_8023AD
:
1510 /* in 802.3ad mode, the internal mechanism
1511 * will activate the slaves in the selected
1514 bond_set_slave_inactive_flags(new_slave
);
1515 /* if this is the first slave */
1516 if (bond
->slave_cnt
== 1) {
1517 SLAVE_AD_INFO(new_slave
).id
= 1;
1518 /* Initialize AD with the number of times that the AD timer is called in 1 second
1519 * can be called only after the mac address of the bond is set
1521 bond_3ad_initialize(bond
, 1000/AD_TIMER_INTERVAL
,
1522 bond
->params
.lacp_fast
);
1524 SLAVE_AD_INFO(new_slave
).id
=
1525 SLAVE_AD_INFO(new_slave
->prev
).id
+ 1;
1528 bond_3ad_bind_slave(new_slave
);
1532 new_slave
->state
= BOND_STATE_ACTIVE
;
1533 if ((!bond
->curr_active_slave
) &&
1534 (new_slave
->link
!= BOND_LINK_DOWN
)) {
1535 /* first slave or no active slave yet, and this link
1536 * is OK, so make this interface the active one
1538 bond_change_active_slave(bond
, new_slave
);
1540 bond_set_slave_inactive_flags(new_slave
);
1544 dprintk("This slave is always active in trunk mode\n");
1546 /* always active in trunk mode */
1547 new_slave
->state
= BOND_STATE_ACTIVE
;
1549 /* In trunking mode there is little meaning to curr_active_slave
1550 * anyway (it holds no special properties of the bond device),
1551 * so we can change it without calling change_active_interface()
1553 if (!bond
->curr_active_slave
) {
1554 bond
->curr_active_slave
= new_slave
;
1557 } /* switch(bond_mode) */
1559 bond_set_carrier(bond
);
1561 write_unlock_bh(&bond
->lock
);
1563 res
= bond_create_slave_symlinks(bond_dev
, slave_dev
);
1565 goto err_unset_master
;
1567 printk(KERN_INFO DRV_NAME
1568 ": %s: enslaving %s as a%s interface with a%s link.\n",
1569 bond_dev
->name
, slave_dev
->name
,
1570 new_slave
->state
== BOND_STATE_ACTIVE
? "n active" : " backup",
1571 new_slave
->link
!= BOND_LINK_DOWN
? "n up" : " down");
1573 /* enslave is successful */
1576 /* Undo stages on error */
1578 netdev_set_master(slave_dev
, NULL
);
1581 dev_close(slave_dev
);
1584 memcpy(addr
.sa_data
, new_slave
->perm_hwaddr
, ETH_ALEN
);
1585 addr
.sa_family
= slave_dev
->type
;
1586 dev_set_mac_address(slave_dev
, &addr
);
1592 bond_dev
->features
= old_features
;
1598 * Try to release the slave device <slave> from the bond device <master>
1599 * It is legal to access curr_active_slave without a lock because all the function
1602 * The rules for slave state should be:
1603 * for Active/Backup:
1604 * Active stays on all backups go down
1605 * for Bonded connections:
1606 * The first up interface should be left on and all others downed.
1608 int bond_release(struct net_device
*bond_dev
, struct net_device
*slave_dev
)
1610 struct bonding
*bond
= bond_dev
->priv
;
1611 struct slave
*slave
, *oldcurrent
;
1612 struct sockaddr addr
;
1613 int mac_addr_differ
;
1615 /* slave is not a slave or master is not master of this slave */
1616 if (!(slave_dev
->flags
& IFF_SLAVE
) ||
1617 (slave_dev
->master
!= bond_dev
)) {
1618 printk(KERN_ERR DRV_NAME
1619 ": %s: Error: cannot release %s.\n",
1620 bond_dev
->name
, slave_dev
->name
);
1624 write_lock_bh(&bond
->lock
);
1626 slave
= bond_get_slave_by_dev(bond
, slave_dev
);
1628 /* not a slave of this bond */
1629 printk(KERN_INFO DRV_NAME
1630 ": %s: %s not enslaved\n",
1631 bond_dev
->name
, slave_dev
->name
);
1632 write_unlock_bh(&bond
->lock
);
1636 mac_addr_differ
= memcmp(bond_dev
->dev_addr
,
1639 if (!mac_addr_differ
&& (bond
->slave_cnt
> 1)) {
1640 printk(KERN_WARNING DRV_NAME
1641 ": %s: Warning: the permanent HWaddr of %s "
1642 "- %02X:%02X:%02X:%02X:%02X:%02X - is "
1643 "still in use by %s. Set the HWaddr of "
1644 "%s to a different address to avoid "
1648 slave
->perm_hwaddr
[0],
1649 slave
->perm_hwaddr
[1],
1650 slave
->perm_hwaddr
[2],
1651 slave
->perm_hwaddr
[3],
1652 slave
->perm_hwaddr
[4],
1653 slave
->perm_hwaddr
[5],
1658 /* Inform AD package of unbinding of slave. */
1659 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
1660 /* must be called before the slave is
1661 * detached from the list
1663 bond_3ad_unbind_slave(slave
);
1666 printk(KERN_INFO DRV_NAME
1667 ": %s: releasing %s interface %s\n",
1669 (slave
->state
== BOND_STATE_ACTIVE
)
1670 ? "active" : "backup",
1673 oldcurrent
= bond
->curr_active_slave
;
1675 bond
->current_arp_slave
= NULL
;
1677 /* release the slave from its bond */
1678 bond_detach_slave(bond
, slave
);
1680 bond_compute_features(bond
);
1682 if (bond
->primary_slave
== slave
) {
1683 bond
->primary_slave
= NULL
;
1686 if (oldcurrent
== slave
) {
1687 bond_change_active_slave(bond
, NULL
);
1690 if ((bond
->params
.mode
== BOND_MODE_TLB
) ||
1691 (bond
->params
.mode
== BOND_MODE_ALB
)) {
1692 /* Must be called only after the slave has been
1693 * detached from the list and the curr_active_slave
1694 * has been cleared (if our_slave == old_current),
1695 * but before a new active slave is selected.
1697 bond_alb_deinit_slave(bond
, slave
);
1700 if (oldcurrent
== slave
)
1701 bond_select_active_slave(bond
);
1703 if (bond
->slave_cnt
== 0) {
1704 bond_set_carrier(bond
);
1706 /* if the last slave was removed, zero the mac address
1707 * of the master so it will be set by the application
1708 * to the mac address of the first slave
1710 memset(bond_dev
->dev_addr
, 0, bond_dev
->addr_len
);
1712 if (list_empty(&bond
->vlan_list
)) {
1713 bond_dev
->features
|= NETIF_F_VLAN_CHALLENGED
;
1715 printk(KERN_WARNING DRV_NAME
1716 ": %s: Warning: clearing HW address of %s while it "
1717 "still has VLANs.\n",
1718 bond_dev
->name
, bond_dev
->name
);
1719 printk(KERN_WARNING DRV_NAME
1720 ": %s: When re-adding slaves, make sure the bond's "
1721 "HW address matches its VLANs'.\n",
1724 } else if ((bond_dev
->features
& NETIF_F_VLAN_CHALLENGED
) &&
1725 !bond_has_challenged_slaves(bond
)) {
1726 printk(KERN_INFO DRV_NAME
1727 ": %s: last VLAN challenged slave %s "
1728 "left bond %s. VLAN blocking is removed\n",
1729 bond_dev
->name
, slave_dev
->name
, bond_dev
->name
);
1730 bond_dev
->features
&= ~NETIF_F_VLAN_CHALLENGED
;
1733 write_unlock_bh(&bond
->lock
);
1735 /* must do this from outside any spinlocks */
1736 bond_destroy_slave_symlinks(bond_dev
, slave_dev
);
1738 bond_del_vlans_from_slave(bond
, slave_dev
);
1740 /* If the mode USES_PRIMARY, then we should only remove its
1741 * promisc and mc settings if it was the curr_active_slave, but that was
1742 * already taken care of above when we detached the slave
1744 if (!USES_PRIMARY(bond
->params
.mode
)) {
1745 /* unset promiscuity level from slave */
1746 if (bond_dev
->flags
& IFF_PROMISC
) {
1747 dev_set_promiscuity(slave_dev
, -1);
1750 /* unset allmulti level from slave */
1751 if (bond_dev
->flags
& IFF_ALLMULTI
) {
1752 dev_set_allmulti(slave_dev
, -1);
1755 /* flush master's mc_list from slave */
1756 bond_mc_list_flush(bond_dev
, slave_dev
);
1759 netdev_set_master(slave_dev
, NULL
);
1761 /* close slave before restoring its mac address */
1762 dev_close(slave_dev
);
1764 /* restore original ("permanent") mac address */
1765 memcpy(addr
.sa_data
, slave
->perm_hwaddr
, ETH_ALEN
);
1766 addr
.sa_family
= slave_dev
->type
;
1767 dev_set_mac_address(slave_dev
, &addr
);
1769 slave_dev
->priv_flags
&= ~(IFF_MASTER_8023AD
| IFF_MASTER_ALB
|
1770 IFF_SLAVE_INACTIVE
| IFF_BONDING
|
1775 return 0; /* deletion OK */
1779 * This function releases all slaves.
1781 static int bond_release_all(struct net_device
*bond_dev
)
1783 struct bonding
*bond
= bond_dev
->priv
;
1784 struct slave
*slave
;
1785 struct net_device
*slave_dev
;
1786 struct sockaddr addr
;
1788 write_lock_bh(&bond
->lock
);
1790 netif_carrier_off(bond_dev
);
1792 if (bond
->slave_cnt
== 0) {
1796 bond
->current_arp_slave
= NULL
;
1797 bond
->primary_slave
= NULL
;
1798 bond_change_active_slave(bond
, NULL
);
1800 while ((slave
= bond
->first_slave
) != NULL
) {
1801 /* Inform AD package of unbinding of slave
1802 * before slave is detached from the list.
1804 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
1805 bond_3ad_unbind_slave(slave
);
1808 slave_dev
= slave
->dev
;
1809 bond_detach_slave(bond
, slave
);
1811 if ((bond
->params
.mode
== BOND_MODE_TLB
) ||
1812 (bond
->params
.mode
== BOND_MODE_ALB
)) {
1813 /* must be called only after the slave
1814 * has been detached from the list
1816 bond_alb_deinit_slave(bond
, slave
);
1819 bond_compute_features(bond
);
1821 /* now that the slave is detached, unlock and perform
1822 * all the undo steps that should not be called from
1825 write_unlock_bh(&bond
->lock
);
1827 bond_destroy_slave_symlinks(bond_dev
, slave_dev
);
1828 bond_del_vlans_from_slave(bond
, slave_dev
);
1830 /* If the mode USES_PRIMARY, then we should only remove its
1831 * promisc and mc settings if it was the curr_active_slave, but that was
1832 * already taken care of above when we detached the slave
1834 if (!USES_PRIMARY(bond
->params
.mode
)) {
1835 /* unset promiscuity level from slave */
1836 if (bond_dev
->flags
& IFF_PROMISC
) {
1837 dev_set_promiscuity(slave_dev
, -1);
1840 /* unset allmulti level from slave */
1841 if (bond_dev
->flags
& IFF_ALLMULTI
) {
1842 dev_set_allmulti(slave_dev
, -1);
1845 /* flush master's mc_list from slave */
1846 bond_mc_list_flush(bond_dev
, slave_dev
);
1849 netdev_set_master(slave_dev
, NULL
);
1851 /* close slave before restoring its mac address */
1852 dev_close(slave_dev
);
1854 /* restore original ("permanent") mac address*/
1855 memcpy(addr
.sa_data
, slave
->perm_hwaddr
, ETH_ALEN
);
1856 addr
.sa_family
= slave_dev
->type
;
1857 dev_set_mac_address(slave_dev
, &addr
);
1859 slave_dev
->priv_flags
&= ~(IFF_MASTER_8023AD
| IFF_MASTER_ALB
|
1860 IFF_SLAVE_INACTIVE
);
1864 /* re-acquire the lock before getting the next slave */
1865 write_lock_bh(&bond
->lock
);
1868 /* zero the mac address of the master so it will be
1869 * set by the application to the mac address of the
1872 memset(bond_dev
->dev_addr
, 0, bond_dev
->addr_len
);
1874 if (list_empty(&bond
->vlan_list
)) {
1875 bond_dev
->features
|= NETIF_F_VLAN_CHALLENGED
;
1877 printk(KERN_WARNING DRV_NAME
1878 ": %s: Warning: clearing HW address of %s while it "
1879 "still has VLANs.\n",
1880 bond_dev
->name
, bond_dev
->name
);
1881 printk(KERN_WARNING DRV_NAME
1882 ": %s: When re-adding slaves, make sure the bond's "
1883 "HW address matches its VLANs'.\n",
1887 printk(KERN_INFO DRV_NAME
1888 ": %s: released all slaves\n",
1892 write_unlock_bh(&bond
->lock
);
1898 * This function changes the active slave to slave <slave_dev>.
1899 * It returns -EINVAL in the following cases.
1900 * - <slave_dev> is not found in the list.
1901 * - There is not active slave now.
1902 * - <slave_dev> is already active.
1903 * - The link state of <slave_dev> is not BOND_LINK_UP.
1904 * - <slave_dev> is not running.
1905 * In these cases, this fuction does nothing.
1906 * In the other cases, currnt_slave pointer is changed and 0 is returned.
1908 static int bond_ioctl_change_active(struct net_device
*bond_dev
, struct net_device
*slave_dev
)
1910 struct bonding
*bond
= bond_dev
->priv
;
1911 struct slave
*old_active
= NULL
;
1912 struct slave
*new_active
= NULL
;
1915 if (!USES_PRIMARY(bond
->params
.mode
)) {
1919 /* Verify that master_dev is indeed the master of slave_dev */
1920 if (!(slave_dev
->flags
& IFF_SLAVE
) ||
1921 (slave_dev
->master
!= bond_dev
)) {
1925 write_lock_bh(&bond
->lock
);
1927 old_active
= bond
->curr_active_slave
;
1928 new_active
= bond_get_slave_by_dev(bond
, slave_dev
);
1931 * Changing to the current active: do nothing; return success.
1933 if (new_active
&& (new_active
== old_active
)) {
1934 write_unlock_bh(&bond
->lock
);
1940 (new_active
->link
== BOND_LINK_UP
) &&
1941 IS_UP(new_active
->dev
)) {
1942 bond_change_active_slave(bond
, new_active
);
1947 write_unlock_bh(&bond
->lock
);
1952 static int bond_info_query(struct net_device
*bond_dev
, struct ifbond
*info
)
1954 struct bonding
*bond
= bond_dev
->priv
;
1956 info
->bond_mode
= bond
->params
.mode
;
1957 info
->miimon
= bond
->params
.miimon
;
1959 read_lock_bh(&bond
->lock
);
1960 info
->num_slaves
= bond
->slave_cnt
;
1961 read_unlock_bh(&bond
->lock
);
1966 static int bond_slave_info_query(struct net_device
*bond_dev
, struct ifslave
*info
)
1968 struct bonding
*bond
= bond_dev
->priv
;
1969 struct slave
*slave
;
1972 if (info
->slave_id
< 0) {
1976 read_lock_bh(&bond
->lock
);
1978 bond_for_each_slave(bond
, slave
, i
) {
1979 if (i
== (int)info
->slave_id
) {
1985 read_unlock_bh(&bond
->lock
);
1988 strcpy(info
->slave_name
, slave
->dev
->name
);
1989 info
->link
= slave
->link
;
1990 info
->state
= slave
->state
;
1991 info
->link_failure_count
= slave
->link_failure_count
;
1999 /*-------------------------------- Monitoring -------------------------------*/
2001 /* this function is called regularly to monitor each slave's link. */
2002 void bond_mii_monitor(struct net_device
*bond_dev
)
2004 struct bonding
*bond
= bond_dev
->priv
;
2005 struct slave
*slave
, *oldcurrent
;
2006 int do_failover
= 0;
2010 read_lock(&bond
->lock
);
2012 delta_in_ticks
= (bond
->params
.miimon
* HZ
) / 1000;
2014 if (bond
->kill_timers
) {
2018 if (bond
->slave_cnt
== 0) {
2022 /* we will try to read the link status of each of our slaves, and
2023 * set their IFF_RUNNING flag appropriately. For each slave not
2024 * supporting MII status, we won't do anything so that a user-space
2025 * program could monitor the link itself if needed.
2028 read_lock(&bond
->curr_slave_lock
);
2029 oldcurrent
= bond
->curr_active_slave
;
2030 read_unlock(&bond
->curr_slave_lock
);
2032 bond_for_each_slave(bond
, slave
, i
) {
2033 struct net_device
*slave_dev
= slave
->dev
;
2035 u16 old_speed
= slave
->speed
;
2036 u8 old_duplex
= slave
->duplex
;
2038 link_state
= bond_check_dev_link(bond
, slave_dev
, 0);
2040 switch (slave
->link
) {
2041 case BOND_LINK_UP
: /* the link was up */
2042 if (link_state
== BMSR_LSTATUS
) {
2043 /* link stays up, nothing more to do */
2045 } else { /* link going down */
2046 slave
->link
= BOND_LINK_FAIL
;
2047 slave
->delay
= bond
->params
.downdelay
;
2049 if (slave
->link_failure_count
< UINT_MAX
) {
2050 slave
->link_failure_count
++;
2053 if (bond
->params
.downdelay
) {
2054 printk(KERN_INFO DRV_NAME
2055 ": %s: link status down for %s "
2056 "interface %s, disabling it in "
2060 ? ((bond
->params
.mode
== BOND_MODE_ACTIVEBACKUP
)
2061 ? ((slave
== oldcurrent
)
2062 ? "active " : "backup ")
2066 bond
->params
.downdelay
* bond
->params
.miimon
);
2069 /* no break ! fall through the BOND_LINK_FAIL test to
2070 ensure proper action to be taken
2072 case BOND_LINK_FAIL
: /* the link has just gone down */
2073 if (link_state
!= BMSR_LSTATUS
) {
2074 /* link stays down */
2075 if (slave
->delay
<= 0) {
2076 /* link down for too long time */
2077 slave
->link
= BOND_LINK_DOWN
;
2079 /* in active/backup mode, we must
2080 * completely disable this interface
2082 if ((bond
->params
.mode
== BOND_MODE_ACTIVEBACKUP
) ||
2083 (bond
->params
.mode
== BOND_MODE_8023AD
)) {
2084 bond_set_slave_inactive_flags(slave
);
2087 printk(KERN_INFO DRV_NAME
2088 ": %s: link status definitely "
2089 "down for interface %s, "
2094 /* notify ad that the link status has changed */
2095 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
2096 bond_3ad_handle_link_change(slave
, BOND_LINK_DOWN
);
2099 if ((bond
->params
.mode
== BOND_MODE_TLB
) ||
2100 (bond
->params
.mode
== BOND_MODE_ALB
)) {
2101 bond_alb_handle_link_change(bond
, slave
, BOND_LINK_DOWN
);
2104 if (slave
== oldcurrent
) {
2112 slave
->link
= BOND_LINK_UP
;
2113 slave
->jiffies
= jiffies
;
2114 printk(KERN_INFO DRV_NAME
2115 ": %s: link status up again after %d "
2116 "ms for interface %s.\n",
2118 (bond
->params
.downdelay
- slave
->delay
) * bond
->params
.miimon
,
2122 case BOND_LINK_DOWN
: /* the link was down */
2123 if (link_state
!= BMSR_LSTATUS
) {
2124 /* the link stays down, nothing more to do */
2126 } else { /* link going up */
2127 slave
->link
= BOND_LINK_BACK
;
2128 slave
->delay
= bond
->params
.updelay
;
2130 if (bond
->params
.updelay
) {
2131 /* if updelay == 0, no need to
2132 advertise about a 0 ms delay */
2133 printk(KERN_INFO DRV_NAME
2134 ": %s: link status up for "
2135 "interface %s, enabling it "
2139 bond
->params
.updelay
* bond
->params
.miimon
);
2142 /* no break ! fall through the BOND_LINK_BACK state in
2143 case there's something to do.
2145 case BOND_LINK_BACK
: /* the link has just come back */
2146 if (link_state
!= BMSR_LSTATUS
) {
2147 /* link down again */
2148 slave
->link
= BOND_LINK_DOWN
;
2150 printk(KERN_INFO DRV_NAME
2151 ": %s: link status down again after %d "
2152 "ms for interface %s.\n",
2154 (bond
->params
.updelay
- slave
->delay
) * bond
->params
.miimon
,
2158 if (slave
->delay
== 0) {
2159 /* now the link has been up for long time enough */
2160 slave
->link
= BOND_LINK_UP
;
2161 slave
->jiffies
= jiffies
;
2163 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
2164 /* prevent it from being the active one */
2165 slave
->state
= BOND_STATE_BACKUP
;
2166 } else if (bond
->params
.mode
!= BOND_MODE_ACTIVEBACKUP
) {
2167 /* make it immediately active */
2168 slave
->state
= BOND_STATE_ACTIVE
;
2169 } else if (slave
!= bond
->primary_slave
) {
2170 /* prevent it from being the active one */
2171 slave
->state
= BOND_STATE_BACKUP
;
2174 printk(KERN_INFO DRV_NAME
2175 ": %s: link status definitely "
2176 "up for interface %s.\n",
2180 /* notify ad that the link status has changed */
2181 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
2182 bond_3ad_handle_link_change(slave
, BOND_LINK_UP
);
2185 if ((bond
->params
.mode
== BOND_MODE_TLB
) ||
2186 (bond
->params
.mode
== BOND_MODE_ALB
)) {
2187 bond_alb_handle_link_change(bond
, slave
, BOND_LINK_UP
);
2190 if ((!oldcurrent
) ||
2191 (slave
== bond
->primary_slave
)) {
2200 /* Should not happen */
2201 printk(KERN_ERR DRV_NAME
2202 ": %s: Error: %s Illegal value (link=%d)\n",
2207 } /* end of switch (slave->link) */
2209 bond_update_speed_duplex(slave
);
2211 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
2212 if (old_speed
!= slave
->speed
) {
2213 bond_3ad_adapter_speed_changed(slave
);
2216 if (old_duplex
!= slave
->duplex
) {
2217 bond_3ad_adapter_duplex_changed(slave
);
2224 write_lock(&bond
->curr_slave_lock
);
2226 bond_select_active_slave(bond
);
2228 write_unlock(&bond
->curr_slave_lock
);
2230 bond_set_carrier(bond
);
2233 if (bond
->params
.miimon
) {
2234 mod_timer(&bond
->mii_timer
, jiffies
+ delta_in_ticks
);
2237 read_unlock(&bond
->lock
);
2241 static u32
bond_glean_dev_ip(struct net_device
*dev
)
2243 struct in_device
*idev
;
2244 struct in_ifaddr
*ifa
;
2251 idev
= __in_dev_get_rcu(dev
);
2255 ifa
= idev
->ifa_list
;
2259 addr
= ifa
->ifa_local
;
2265 static int bond_has_ip(struct bonding
*bond
)
2267 struct vlan_entry
*vlan
, *vlan_next
;
2269 if (bond
->master_ip
)
2272 if (list_empty(&bond
->vlan_list
))
2275 list_for_each_entry_safe(vlan
, vlan_next
, &bond
->vlan_list
,
2284 static int bond_has_this_ip(struct bonding
*bond
, u32 ip
)
2286 struct vlan_entry
*vlan
, *vlan_next
;
2288 if (ip
== bond
->master_ip
)
2291 if (list_empty(&bond
->vlan_list
))
2294 list_for_each_entry_safe(vlan
, vlan_next
, &bond
->vlan_list
,
2296 if (ip
== vlan
->vlan_ip
)
2304 * We go to the (large) trouble of VLAN tagging ARP frames because
2305 * switches in VLAN mode (especially if ports are configured as
2306 * "native" to a VLAN) might not pass non-tagged frames.
2308 static void bond_arp_send(struct net_device
*slave_dev
, int arp_op
, u32 dest_ip
, u32 src_ip
, unsigned short vlan_id
)
2310 struct sk_buff
*skb
;
2312 dprintk("arp %d on slave %s: dst %x src %x vid %d\n", arp_op
,
2313 slave_dev
->name
, dest_ip
, src_ip
, vlan_id
);
2315 skb
= arp_create(arp_op
, ETH_P_ARP
, dest_ip
, slave_dev
, src_ip
,
2316 NULL
, slave_dev
->dev_addr
, NULL
);
2319 printk(KERN_ERR DRV_NAME
": ARP packet allocation failed\n");
2323 skb
= vlan_put_tag(skb
, vlan_id
);
2325 printk(KERN_ERR DRV_NAME
": failed to insert VLAN tag\n");
2333 static void bond_arp_send_all(struct bonding
*bond
, struct slave
*slave
)
2336 u32
*targets
= bond
->params
.arp_targets
;
2337 struct vlan_entry
*vlan
, *vlan_next
;
2338 struct net_device
*vlan_dev
;
2342 for (i
= 0; (i
< BOND_MAX_ARP_TARGETS
); i
++) {
2345 dprintk("basa: target %x\n", targets
[i
]);
2346 if (list_empty(&bond
->vlan_list
)) {
2347 dprintk("basa: empty vlan: arp_send\n");
2348 bond_arp_send(slave
->dev
, ARPOP_REQUEST
, targets
[i
],
2349 bond
->master_ip
, 0);
2354 * If VLANs are configured, we do a route lookup to
2355 * determine which VLAN interface would be used, so we
2356 * can tag the ARP with the proper VLAN tag.
2358 memset(&fl
, 0, sizeof(fl
));
2359 fl
.fl4_dst
= targets
[i
];
2360 fl
.fl4_tos
= RTO_ONLINK
;
2362 rv
= ip_route_output_key(&rt
, &fl
);
2364 if (net_ratelimit()) {
2365 printk(KERN_WARNING DRV_NAME
2366 ": %s: no route to arp_ip_target %u.%u.%u.%u\n",
2367 bond
->dev
->name
, NIPQUAD(fl
.fl4_dst
));
2373 * This target is not on a VLAN
2375 if (rt
->u
.dst
.dev
== bond
->dev
) {
2377 dprintk("basa: rtdev == bond->dev: arp_send\n");
2378 bond_arp_send(slave
->dev
, ARPOP_REQUEST
, targets
[i
],
2379 bond
->master_ip
, 0);
2384 list_for_each_entry_safe(vlan
, vlan_next
, &bond
->vlan_list
,
2386 vlan_dev
= vlan_group_get_device(bond
->vlgrp
, vlan
->vlan_id
);
2387 if (vlan_dev
== rt
->u
.dst
.dev
) {
2388 vlan_id
= vlan
->vlan_id
;
2389 dprintk("basa: vlan match on %s %d\n",
2390 vlan_dev
->name
, vlan_id
);
2397 bond_arp_send(slave
->dev
, ARPOP_REQUEST
, targets
[i
],
2398 vlan
->vlan_ip
, vlan_id
);
2402 if (net_ratelimit()) {
2403 printk(KERN_WARNING DRV_NAME
2404 ": %s: no path to arp_ip_target %u.%u.%u.%u via rt.dev %s\n",
2405 bond
->dev
->name
, NIPQUAD(fl
.fl4_dst
),
2406 rt
->u
.dst
.dev
? rt
->u
.dst
.dev
->name
: "NULL");
2413 * Kick out a gratuitous ARP for an IP on the bonding master plus one
2414 * for each VLAN above us.
2416 static void bond_send_gratuitous_arp(struct bonding
*bond
)
2418 struct slave
*slave
= bond
->curr_active_slave
;
2419 struct vlan_entry
*vlan
;
2420 struct net_device
*vlan_dev
;
2422 dprintk("bond_send_grat_arp: bond %s slave %s\n", bond
->dev
->name
,
2423 slave
? slave
->dev
->name
: "NULL");
2427 if (bond
->master_ip
) {
2428 bond_arp_send(slave
->dev
, ARPOP_REPLY
, bond
->master_ip
,
2429 bond
->master_ip
, 0);
2432 list_for_each_entry(vlan
, &bond
->vlan_list
, vlan_list
) {
2433 vlan_dev
= vlan_group_get_device(bond
->vlgrp
, vlan
->vlan_id
);
2434 if (vlan
->vlan_ip
) {
2435 bond_arp_send(slave
->dev
, ARPOP_REPLY
, vlan
->vlan_ip
,
2436 vlan
->vlan_ip
, vlan
->vlan_id
);
2441 static void bond_validate_arp(struct bonding
*bond
, struct slave
*slave
, u32 sip
, u32 tip
)
2444 u32
*targets
= bond
->params
.arp_targets
;
2446 targets
= bond
->params
.arp_targets
;
2447 for (i
= 0; (i
< BOND_MAX_ARP_TARGETS
) && targets
[i
]; i
++) {
2448 dprintk("bva: sip %u.%u.%u.%u tip %u.%u.%u.%u t[%d] "
2449 "%u.%u.%u.%u bhti(tip) %d\n",
2450 NIPQUAD(sip
), NIPQUAD(tip
), i
, NIPQUAD(targets
[i
]),
2451 bond_has_this_ip(bond
, tip
));
2452 if (sip
== targets
[i
]) {
2453 if (bond_has_this_ip(bond
, tip
))
2454 slave
->last_arp_rx
= jiffies
;
2460 static int bond_arp_rcv(struct sk_buff
*skb
, struct net_device
*dev
, struct packet_type
*pt
, struct net_device
*orig_dev
)
2463 struct slave
*slave
;
2464 struct bonding
*bond
;
2465 unsigned char *arp_ptr
;
2468 if (!(dev
->priv_flags
& IFF_BONDING
) || !(dev
->flags
& IFF_MASTER
))
2472 read_lock(&bond
->lock
);
2474 dprintk("bond_arp_rcv: bond %s skb->dev %s orig_dev %s\n",
2475 bond
->dev
->name
, skb
->dev
? skb
->dev
->name
: "NULL",
2476 orig_dev
? orig_dev
->name
: "NULL");
2478 slave
= bond_get_slave_by_dev(bond
, orig_dev
);
2479 if (!slave
|| !slave_do_arp_validate(bond
, slave
))
2482 /* ARP header, plus 2 device addresses, plus 2 IP addresses. */
2483 if (!pskb_may_pull(skb
, (sizeof(struct arphdr
) +
2484 (2 * dev
->addr_len
) +
2485 (2 * sizeof(u32
)))))
2489 if (arp
->ar_hln
!= dev
->addr_len
||
2490 skb
->pkt_type
== PACKET_OTHERHOST
||
2491 skb
->pkt_type
== PACKET_LOOPBACK
||
2492 arp
->ar_hrd
!= htons(ARPHRD_ETHER
) ||
2493 arp
->ar_pro
!= htons(ETH_P_IP
) ||
2497 arp_ptr
= (unsigned char *)(arp
+ 1);
2498 arp_ptr
+= dev
->addr_len
;
2499 memcpy(&sip
, arp_ptr
, 4);
2500 arp_ptr
+= 4 + dev
->addr_len
;
2501 memcpy(&tip
, arp_ptr
, 4);
2503 dprintk("bond_arp_rcv: %s %s/%d av %d sv %d sip %u.%u.%u.%u"
2504 " tip %u.%u.%u.%u\n", bond
->dev
->name
, slave
->dev
->name
,
2505 slave
->state
, bond
->params
.arp_validate
,
2506 slave_do_arp_validate(bond
, slave
), NIPQUAD(sip
), NIPQUAD(tip
));
2509 * Backup slaves won't see the ARP reply, but do come through
2510 * here for each ARP probe (so we swap the sip/tip to validate
2511 * the probe). In a "redundant switch, common router" type of
2512 * configuration, the ARP probe will (hopefully) travel from
2513 * the active, through one switch, the router, then the other
2514 * switch before reaching the backup.
2516 if (slave
->state
== BOND_STATE_ACTIVE
)
2517 bond_validate_arp(bond
, slave
, sip
, tip
);
2519 bond_validate_arp(bond
, slave
, tip
, sip
);
2522 read_unlock(&bond
->lock
);
2525 return NET_RX_SUCCESS
;
2529 * this function is called regularly to monitor each slave's link
2530 * ensuring that traffic is being sent and received when arp monitoring
2531 * is used in load-balancing mode. if the adapter has been dormant, then an
2532 * arp is transmitted to generate traffic. see activebackup_arp_monitor for
2533 * arp monitoring in active backup mode.
2535 void bond_loadbalance_arp_mon(struct net_device
*bond_dev
)
2537 struct bonding
*bond
= bond_dev
->priv
;
2538 struct slave
*slave
, *oldcurrent
;
2539 int do_failover
= 0;
2543 read_lock(&bond
->lock
);
2545 delta_in_ticks
= (bond
->params
.arp_interval
* HZ
) / 1000;
2547 if (bond
->kill_timers
) {
2551 if (bond
->slave_cnt
== 0) {
2555 read_lock(&bond
->curr_slave_lock
);
2556 oldcurrent
= bond
->curr_active_slave
;
2557 read_unlock(&bond
->curr_slave_lock
);
2559 /* see if any of the previous devices are up now (i.e. they have
2560 * xmt and rcv traffic). the curr_active_slave does not come into
2561 * the picture unless it is null. also, slave->jiffies is not needed
2562 * here because we send an arp on each slave and give a slave as
2563 * long as it needs to get the tx/rx within the delta.
2564 * TODO: what about up/down delay in arp mode? it wasn't here before
2567 bond_for_each_slave(bond
, slave
, i
) {
2568 if (slave
->link
!= BOND_LINK_UP
) {
2569 if (((jiffies
- slave
->dev
->trans_start
) <= delta_in_ticks
) &&
2570 ((jiffies
- slave
->dev
->last_rx
) <= delta_in_ticks
)) {
2572 slave
->link
= BOND_LINK_UP
;
2573 slave
->state
= BOND_STATE_ACTIVE
;
2575 /* primary_slave has no meaning in round-robin
2576 * mode. the window of a slave being up and
2577 * curr_active_slave being null after enslaving
2581 printk(KERN_INFO DRV_NAME
2582 ": %s: link status definitely "
2583 "up for interface %s, ",
2588 printk(KERN_INFO DRV_NAME
2589 ": %s: interface %s is now up\n",
2595 /* slave->link == BOND_LINK_UP */
2597 /* not all switches will respond to an arp request
2598 * when the source ip is 0, so don't take the link down
2599 * if we don't know our ip yet
2601 if (((jiffies
- slave
->dev
->trans_start
) >= (2*delta_in_ticks
)) ||
2602 (((jiffies
- slave
->dev
->last_rx
) >= (2*delta_in_ticks
)) &&
2603 bond_has_ip(bond
))) {
2605 slave
->link
= BOND_LINK_DOWN
;
2606 slave
->state
= BOND_STATE_BACKUP
;
2608 if (slave
->link_failure_count
< UINT_MAX
) {
2609 slave
->link_failure_count
++;
2612 printk(KERN_INFO DRV_NAME
2613 ": %s: interface %s is now down.\n",
2617 if (slave
== oldcurrent
) {
2623 /* note: if switch is in round-robin mode, all links
2624 * must tx arp to ensure all links rx an arp - otherwise
2625 * links may oscillate or not come up at all; if switch is
2626 * in something like xor mode, there is nothing we can
2627 * do - all replies will be rx'ed on same link causing slaves
2628 * to be unstable during low/no traffic periods
2630 if (IS_UP(slave
->dev
)) {
2631 bond_arp_send_all(bond
, slave
);
2636 write_lock(&bond
->curr_slave_lock
);
2638 bond_select_active_slave(bond
);
2640 write_unlock(&bond
->curr_slave_lock
);
2644 if (bond
->params
.arp_interval
) {
2645 mod_timer(&bond
->arp_timer
, jiffies
+ delta_in_ticks
);
2648 read_unlock(&bond
->lock
);
2652 * When using arp monitoring in active-backup mode, this function is
2653 * called to determine if any backup slaves have went down or a new
2654 * current slave needs to be found.
2655 * The backup slaves never generate traffic, they are considered up by merely
2656 * receiving traffic. If the current slave goes down, each backup slave will
2657 * be given the opportunity to tx/rx an arp before being taken down - this
2658 * prevents all slaves from being taken down due to the current slave not
2659 * sending any traffic for the backups to receive. The arps are not necessarily
2660 * necessary, any tx and rx traffic will keep the current slave up. While any
2661 * rx traffic will keep the backup slaves up, the current slave is responsible
2662 * for generating traffic to keep them up regardless of any other traffic they
2663 * may have received.
2664 * see loadbalance_arp_monitor for arp monitoring in load balancing mode
2666 void bond_activebackup_arp_mon(struct net_device
*bond_dev
)
2668 struct bonding
*bond
= bond_dev
->priv
;
2669 struct slave
*slave
;
2673 read_lock(&bond
->lock
);
2675 delta_in_ticks
= (bond
->params
.arp_interval
* HZ
) / 1000;
2677 if (bond
->kill_timers
) {
2681 if (bond
->slave_cnt
== 0) {
2685 /* determine if any slave has come up or any backup slave has
2687 * TODO: what about up/down delay in arp mode? it wasn't here before
2690 bond_for_each_slave(bond
, slave
, i
) {
2691 if (slave
->link
!= BOND_LINK_UP
) {
2692 if ((jiffies
- slave_last_rx(bond
, slave
)) <=
2695 slave
->link
= BOND_LINK_UP
;
2697 write_lock(&bond
->curr_slave_lock
);
2699 if ((!bond
->curr_active_slave
) &&
2700 ((jiffies
- slave
->dev
->trans_start
) <= delta_in_ticks
)) {
2701 bond_change_active_slave(bond
, slave
);
2702 bond
->current_arp_slave
= NULL
;
2703 } else if (bond
->curr_active_slave
!= slave
) {
2704 /* this slave has just come up but we
2705 * already have a current slave; this
2706 * can also happen if bond_enslave adds
2707 * a new slave that is up while we are
2708 * searching for a new slave
2710 bond_set_slave_inactive_flags(slave
);
2711 bond
->current_arp_slave
= NULL
;
2714 bond_set_carrier(bond
);
2716 if (slave
== bond
->curr_active_slave
) {
2717 printk(KERN_INFO DRV_NAME
2718 ": %s: %s is up and now the "
2719 "active interface\n",
2722 netif_carrier_on(bond
->dev
);
2724 printk(KERN_INFO DRV_NAME
2725 ": %s: backup interface %s is "
2731 write_unlock(&bond
->curr_slave_lock
);
2734 read_lock(&bond
->curr_slave_lock
);
2736 if ((slave
!= bond
->curr_active_slave
) &&
2737 (!bond
->current_arp_slave
) &&
2738 (((jiffies
- slave_last_rx(bond
, slave
)) >= 3*delta_in_ticks
) &&
2739 bond_has_ip(bond
))) {
2740 /* a backup slave has gone down; three times
2741 * the delta allows the current slave to be
2742 * taken out before the backup slave.
2743 * note: a non-null current_arp_slave indicates
2744 * the curr_active_slave went down and we are
2745 * searching for a new one; under this
2746 * condition we only take the curr_active_slave
2747 * down - this gives each slave a chance to
2748 * tx/rx traffic before being taken out
2751 read_unlock(&bond
->curr_slave_lock
);
2753 slave
->link
= BOND_LINK_DOWN
;
2755 if (slave
->link_failure_count
< UINT_MAX
) {
2756 slave
->link_failure_count
++;
2759 bond_set_slave_inactive_flags(slave
);
2761 printk(KERN_INFO DRV_NAME
2762 ": %s: backup interface %s is now down\n",
2766 read_unlock(&bond
->curr_slave_lock
);
2771 read_lock(&bond
->curr_slave_lock
);
2772 slave
= bond
->curr_active_slave
;
2773 read_unlock(&bond
->curr_slave_lock
);
2776 /* if we have sent traffic in the past 2*arp_intervals but
2777 * haven't xmit and rx traffic in that time interval, select
2778 * a different slave. slave->jiffies is only updated when
2779 * a slave first becomes the curr_active_slave - not necessarily
2780 * after every arp; this ensures the slave has a full 2*delta
2781 * before being taken out. if a primary is being used, check
2782 * if it is up and needs to take over as the curr_active_slave
2784 if ((((jiffies
- slave
->dev
->trans_start
) >= (2*delta_in_ticks
)) ||
2785 (((jiffies
- slave_last_rx(bond
, slave
)) >= (2*delta_in_ticks
)) &&
2786 bond_has_ip(bond
))) &&
2787 ((jiffies
- slave
->jiffies
) >= 2*delta_in_ticks
)) {
2789 slave
->link
= BOND_LINK_DOWN
;
2791 if (slave
->link_failure_count
< UINT_MAX
) {
2792 slave
->link_failure_count
++;
2795 printk(KERN_INFO DRV_NAME
2796 ": %s: link status down for active interface "
2797 "%s, disabling it\n",
2801 write_lock(&bond
->curr_slave_lock
);
2803 bond_select_active_slave(bond
);
2804 slave
= bond
->curr_active_slave
;
2806 write_unlock(&bond
->curr_slave_lock
);
2808 bond
->current_arp_slave
= slave
;
2811 slave
->jiffies
= jiffies
;
2813 } else if ((bond
->primary_slave
) &&
2814 (bond
->primary_slave
!= slave
) &&
2815 (bond
->primary_slave
->link
== BOND_LINK_UP
)) {
2816 /* at this point, slave is the curr_active_slave */
2817 printk(KERN_INFO DRV_NAME
2818 ": %s: changing from interface %s to primary "
2822 bond
->primary_slave
->dev
->name
);
2824 /* primary is up so switch to it */
2825 write_lock(&bond
->curr_slave_lock
);
2826 bond_change_active_slave(bond
, bond
->primary_slave
);
2827 write_unlock(&bond
->curr_slave_lock
);
2829 slave
= bond
->primary_slave
;
2830 slave
->jiffies
= jiffies
;
2832 bond
->current_arp_slave
= NULL
;
2835 /* the current slave must tx an arp to ensure backup slaves
2838 if (slave
&& bond_has_ip(bond
)) {
2839 bond_arp_send_all(bond
, slave
);
2843 /* if we don't have a curr_active_slave, search for the next available
2844 * backup slave from the current_arp_slave and make it the candidate
2845 * for becoming the curr_active_slave
2848 if (!bond
->current_arp_slave
) {
2849 bond
->current_arp_slave
= bond
->first_slave
;
2852 if (bond
->current_arp_slave
) {
2853 bond_set_slave_inactive_flags(bond
->current_arp_slave
);
2855 /* search for next candidate */
2856 bond_for_each_slave_from(bond
, slave
, i
, bond
->current_arp_slave
->next
) {
2857 if (IS_UP(slave
->dev
)) {
2858 slave
->link
= BOND_LINK_BACK
;
2859 bond_set_slave_active_flags(slave
);
2860 bond_arp_send_all(bond
, slave
);
2861 slave
->jiffies
= jiffies
;
2862 bond
->current_arp_slave
= slave
;
2866 /* if the link state is up at this point, we
2867 * mark it down - this can happen if we have
2868 * simultaneous link failures and
2869 * reselect_active_interface doesn't make this
2870 * one the current slave so it is still marked
2871 * up when it is actually down
2873 if (slave
->link
== BOND_LINK_UP
) {
2874 slave
->link
= BOND_LINK_DOWN
;
2875 if (slave
->link_failure_count
< UINT_MAX
) {
2876 slave
->link_failure_count
++;
2879 bond_set_slave_inactive_flags(slave
);
2881 printk(KERN_INFO DRV_NAME
2882 ": %s: backup interface %s is "
2892 if (bond
->params
.arp_interval
) {
2893 mod_timer(&bond
->arp_timer
, jiffies
+ delta_in_ticks
);
2896 read_unlock(&bond
->lock
);
2899 /*------------------------------ proc/seq_file-------------------------------*/
2901 #ifdef CONFIG_PROC_FS
2903 #define SEQ_START_TOKEN ((void *)1)
2905 static void *bond_info_seq_start(struct seq_file
*seq
, loff_t
*pos
)
2907 struct bonding
*bond
= seq
->private;
2909 struct slave
*slave
;
2912 /* make sure the bond won't be taken away */
2913 read_lock(&dev_base_lock
);
2914 read_lock_bh(&bond
->lock
);
2917 return SEQ_START_TOKEN
;
2920 bond_for_each_slave(bond
, slave
, i
) {
2921 if (++off
== *pos
) {
2929 static void *bond_info_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
2931 struct bonding
*bond
= seq
->private;
2932 struct slave
*slave
= v
;
2935 if (v
== SEQ_START_TOKEN
) {
2936 return bond
->first_slave
;
2939 slave
= slave
->next
;
2941 return (slave
== bond
->first_slave
) ? NULL
: slave
;
2944 static void bond_info_seq_stop(struct seq_file
*seq
, void *v
)
2946 struct bonding
*bond
= seq
->private;
2948 read_unlock_bh(&bond
->lock
);
2949 read_unlock(&dev_base_lock
);
2952 static void bond_info_show_master(struct seq_file
*seq
)
2954 struct bonding
*bond
= seq
->private;
2959 read_lock(&bond
->curr_slave_lock
);
2960 curr
= bond
->curr_active_slave
;
2961 read_unlock(&bond
->curr_slave_lock
);
2963 seq_printf(seq
, "Bonding Mode: %s\n",
2964 bond_mode_name(bond
->params
.mode
));
2966 if (bond
->params
.mode
== BOND_MODE_XOR
||
2967 bond
->params
.mode
== BOND_MODE_8023AD
) {
2968 seq_printf(seq
, "Transmit Hash Policy: %s (%d)\n",
2969 xmit_hashtype_tbl
[bond
->params
.xmit_policy
].modename
,
2970 bond
->params
.xmit_policy
);
2973 if (USES_PRIMARY(bond
->params
.mode
)) {
2974 seq_printf(seq
, "Primary Slave: %s\n",
2975 (bond
->primary_slave
) ?
2976 bond
->primary_slave
->dev
->name
: "None");
2978 seq_printf(seq
, "Currently Active Slave: %s\n",
2979 (curr
) ? curr
->dev
->name
: "None");
2982 seq_printf(seq
, "MII Status: %s\n", netif_carrier_ok(bond
->dev
) ?
2984 seq_printf(seq
, "MII Polling Interval (ms): %d\n", bond
->params
.miimon
);
2985 seq_printf(seq
, "Up Delay (ms): %d\n",
2986 bond
->params
.updelay
* bond
->params
.miimon
);
2987 seq_printf(seq
, "Down Delay (ms): %d\n",
2988 bond
->params
.downdelay
* bond
->params
.miimon
);
2991 /* ARP information */
2992 if(bond
->params
.arp_interval
> 0) {
2994 seq_printf(seq
, "ARP Polling Interval (ms): %d\n",
2995 bond
->params
.arp_interval
);
2997 seq_printf(seq
, "ARP IP target/s (n.n.n.n form):");
2999 for(i
= 0; (i
< BOND_MAX_ARP_TARGETS
) ;i
++) {
3000 if (!bond
->params
.arp_targets
[i
])
3003 seq_printf(seq
, ",");
3004 target
= ntohl(bond
->params
.arp_targets
[i
]);
3005 seq_printf(seq
, " %d.%d.%d.%d", HIPQUAD(target
));
3008 seq_printf(seq
, "\n");
3011 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
3012 struct ad_info ad_info
;
3014 seq_puts(seq
, "\n802.3ad info\n");
3015 seq_printf(seq
, "LACP rate: %s\n",
3016 (bond
->params
.lacp_fast
) ? "fast" : "slow");
3018 if (bond_3ad_get_active_agg_info(bond
, &ad_info
)) {
3019 seq_printf(seq
, "bond %s has no active aggregator\n",
3022 seq_printf(seq
, "Active Aggregator Info:\n");
3024 seq_printf(seq
, "\tAggregator ID: %d\n",
3025 ad_info
.aggregator_id
);
3026 seq_printf(seq
, "\tNumber of ports: %d\n",
3028 seq_printf(seq
, "\tActor Key: %d\n",
3030 seq_printf(seq
, "\tPartner Key: %d\n",
3031 ad_info
.partner_key
);
3032 seq_printf(seq
, "\tPartner Mac Address: %02x:%02x:%02x:%02x:%02x:%02x\n",
3033 ad_info
.partner_system
[0],
3034 ad_info
.partner_system
[1],
3035 ad_info
.partner_system
[2],
3036 ad_info
.partner_system
[3],
3037 ad_info
.partner_system
[4],
3038 ad_info
.partner_system
[5]);
3043 static void bond_info_show_slave(struct seq_file
*seq
, const struct slave
*slave
)
3045 struct bonding
*bond
= seq
->private;
3047 seq_printf(seq
, "\nSlave Interface: %s\n", slave
->dev
->name
);
3048 seq_printf(seq
, "MII Status: %s\n",
3049 (slave
->link
== BOND_LINK_UP
) ? "up" : "down");
3050 seq_printf(seq
, "Link Failure Count: %u\n",
3051 slave
->link_failure_count
);
3054 "Permanent HW addr: %02x:%02x:%02x:%02x:%02x:%02x\n",
3055 slave
->perm_hwaddr
[0], slave
->perm_hwaddr
[1],
3056 slave
->perm_hwaddr
[2], slave
->perm_hwaddr
[3],
3057 slave
->perm_hwaddr
[4], slave
->perm_hwaddr
[5]);
3059 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
3060 const struct aggregator
*agg
3061 = SLAVE_AD_INFO(slave
).port
.aggregator
;
3064 seq_printf(seq
, "Aggregator ID: %d\n",
3065 agg
->aggregator_identifier
);
3067 seq_puts(seq
, "Aggregator ID: N/A\n");
3072 static int bond_info_seq_show(struct seq_file
*seq
, void *v
)
3074 if (v
== SEQ_START_TOKEN
) {
3075 seq_printf(seq
, "%s\n", version
);
3076 bond_info_show_master(seq
);
3078 bond_info_show_slave(seq
, v
);
3084 static struct seq_operations bond_info_seq_ops
= {
3085 .start
= bond_info_seq_start
,
3086 .next
= bond_info_seq_next
,
3087 .stop
= bond_info_seq_stop
,
3088 .show
= bond_info_seq_show
,
3091 static int bond_info_open(struct inode
*inode
, struct file
*file
)
3093 struct seq_file
*seq
;
3094 struct proc_dir_entry
*proc
;
3097 res
= seq_open(file
, &bond_info_seq_ops
);
3099 /* recover the pointer buried in proc_dir_entry data */
3100 seq
= file
->private_data
;
3102 seq
->private = proc
->data
;
3108 static const struct file_operations bond_info_fops
= {
3109 .owner
= THIS_MODULE
,
3110 .open
= bond_info_open
,
3112 .llseek
= seq_lseek
,
3113 .release
= seq_release
,
3116 static int bond_create_proc_entry(struct bonding
*bond
)
3118 struct net_device
*bond_dev
= bond
->dev
;
3120 if (bond_proc_dir
) {
3121 bond
->proc_entry
= create_proc_entry(bond_dev
->name
,
3124 if (bond
->proc_entry
== NULL
) {
3125 printk(KERN_WARNING DRV_NAME
3126 ": Warning: Cannot create /proc/net/%s/%s\n",
3127 DRV_NAME
, bond_dev
->name
);
3129 bond
->proc_entry
->data
= bond
;
3130 bond
->proc_entry
->proc_fops
= &bond_info_fops
;
3131 bond
->proc_entry
->owner
= THIS_MODULE
;
3132 memcpy(bond
->proc_file_name
, bond_dev
->name
, IFNAMSIZ
);
3139 static void bond_remove_proc_entry(struct bonding
*bond
)
3141 if (bond_proc_dir
&& bond
->proc_entry
) {
3142 remove_proc_entry(bond
->proc_file_name
, bond_proc_dir
);
3143 memset(bond
->proc_file_name
, 0, IFNAMSIZ
);
3144 bond
->proc_entry
= NULL
;
3148 /* Create the bonding directory under /proc/net, if doesn't exist yet.
3149 * Caller must hold rtnl_lock.
3151 static void bond_create_proc_dir(void)
3153 int len
= strlen(DRV_NAME
);
3155 for (bond_proc_dir
= proc_net
->subdir
; bond_proc_dir
;
3156 bond_proc_dir
= bond_proc_dir
->next
) {
3157 if ((bond_proc_dir
->namelen
== len
) &&
3158 !memcmp(bond_proc_dir
->name
, DRV_NAME
, len
)) {
3163 if (!bond_proc_dir
) {
3164 bond_proc_dir
= proc_mkdir(DRV_NAME
, proc_net
);
3165 if (bond_proc_dir
) {
3166 bond_proc_dir
->owner
= THIS_MODULE
;
3168 printk(KERN_WARNING DRV_NAME
3169 ": Warning: cannot create /proc/net/%s\n",
3175 /* Destroy the bonding directory under /proc/net, if empty.
3176 * Caller must hold rtnl_lock.
3178 static void bond_destroy_proc_dir(void)
3180 struct proc_dir_entry
*de
;
3182 if (!bond_proc_dir
) {
3186 /* verify that the /proc dir is empty */
3187 for (de
= bond_proc_dir
->subdir
; de
; de
= de
->next
) {
3188 /* ignore . and .. */
3189 if (*(de
->name
) != '.') {
3195 if (bond_proc_dir
->owner
== THIS_MODULE
) {
3196 bond_proc_dir
->owner
= NULL
;
3199 remove_proc_entry(DRV_NAME
, proc_net
);
3200 bond_proc_dir
= NULL
;
3203 #endif /* CONFIG_PROC_FS */
3205 /*-------------------------- netdev event handling --------------------------*/
3208 * Change device name
3210 static int bond_event_changename(struct bonding
*bond
)
3212 #ifdef CONFIG_PROC_FS
3213 bond_remove_proc_entry(bond
);
3214 bond_create_proc_entry(bond
);
3216 down_write(&(bonding_rwsem
));
3217 bond_destroy_sysfs_entry(bond
);
3218 bond_create_sysfs_entry(bond
);
3219 up_write(&(bonding_rwsem
));
3223 static int bond_master_netdev_event(unsigned long event
, struct net_device
*bond_dev
)
3225 struct bonding
*event_bond
= bond_dev
->priv
;
3228 case NETDEV_CHANGENAME
:
3229 return bond_event_changename(event_bond
);
3230 case NETDEV_UNREGISTER
:
3232 * TODO: remove a bond from the list?
3242 static int bond_slave_netdev_event(unsigned long event
, struct net_device
*slave_dev
)
3244 struct net_device
*bond_dev
= slave_dev
->master
;
3245 struct bonding
*bond
= bond_dev
->priv
;
3248 case NETDEV_UNREGISTER
:
3250 bond_release(bond_dev
, slave_dev
);
3255 * TODO: is this what we get if somebody
3256 * sets up a hierarchical bond, then rmmod's
3257 * one of the slave bonding devices?
3262 * ... Or is it this?
3265 case NETDEV_CHANGEMTU
:
3267 * TODO: Should slaves be allowed to
3268 * independently alter their MTU? For
3269 * an active-backup bond, slaves need
3270 * not be the same type of device, so
3271 * MTUs may vary. For other modes,
3272 * slaves arguably should have the
3273 * same MTUs. To do this, we'd need to
3274 * take over the slave's change_mtu
3275 * function for the duration of their
3279 case NETDEV_CHANGENAME
:
3281 * TODO: handle changing the primary's name
3284 case NETDEV_FEAT_CHANGE
:
3285 bond_compute_features(bond
);
3295 * bond_netdev_event: handle netdev notifier chain events.
3297 * This function receives events for the netdev chain. The caller (an
3298 * ioctl handler calling blocking_notifier_call_chain) holds the necessary
3299 * locks for us to safely manipulate the slave devices (RTNL lock,
3302 static int bond_netdev_event(struct notifier_block
*this, unsigned long event
, void *ptr
)
3304 struct net_device
*event_dev
= (struct net_device
*)ptr
;
3306 dprintk("event_dev: %s, event: %lx\n",
3307 (event_dev
? event_dev
->name
: "None"),
3310 if (!(event_dev
->priv_flags
& IFF_BONDING
))
3313 if (event_dev
->flags
& IFF_MASTER
) {
3314 dprintk("IFF_MASTER\n");
3315 return bond_master_netdev_event(event
, event_dev
);
3318 if (event_dev
->flags
& IFF_SLAVE
) {
3319 dprintk("IFF_SLAVE\n");
3320 return bond_slave_netdev_event(event
, event_dev
);
3327 * bond_inetaddr_event: handle inetaddr notifier chain events.
3329 * We keep track of device IPs primarily to use as source addresses in
3330 * ARP monitor probes (rather than spewing out broadcasts all the time).
3332 * We track one IP for the main device (if it has one), plus one per VLAN.
3334 static int bond_inetaddr_event(struct notifier_block
*this, unsigned long event
, void *ptr
)
3336 struct in_ifaddr
*ifa
= ptr
;
3337 struct net_device
*vlan_dev
, *event_dev
= ifa
->ifa_dev
->dev
;
3338 struct bonding
*bond
, *bond_next
;
3339 struct vlan_entry
*vlan
, *vlan_next
;
3341 list_for_each_entry_safe(bond
, bond_next
, &bond_dev_list
, bond_list
) {
3342 if (bond
->dev
== event_dev
) {
3345 bond
->master_ip
= ifa
->ifa_local
;
3348 bond
->master_ip
= bond_glean_dev_ip(bond
->dev
);
3355 if (list_empty(&bond
->vlan_list
))
3358 list_for_each_entry_safe(vlan
, vlan_next
, &bond
->vlan_list
,
3360 vlan_dev
= vlan_group_get_device(bond
->vlgrp
, vlan
->vlan_id
);
3361 if (vlan_dev
== event_dev
) {
3364 vlan
->vlan_ip
= ifa
->ifa_local
;
3368 bond_glean_dev_ip(vlan_dev
);
3379 static struct notifier_block bond_netdev_notifier
= {
3380 .notifier_call
= bond_netdev_event
,
3383 static struct notifier_block bond_inetaddr_notifier
= {
3384 .notifier_call
= bond_inetaddr_event
,
3387 /*-------------------------- Packet type handling ---------------------------*/
3389 /* register to receive lacpdus on a bond */
3390 static void bond_register_lacpdu(struct bonding
*bond
)
3392 struct packet_type
*pk_type
= &(BOND_AD_INFO(bond
).ad_pkt_type
);
3394 /* initialize packet type */
3395 pk_type
->type
= PKT_TYPE_LACPDU
;
3396 pk_type
->dev
= bond
->dev
;
3397 pk_type
->func
= bond_3ad_lacpdu_recv
;
3399 dev_add_pack(pk_type
);
3402 /* unregister to receive lacpdus on a bond */
3403 static void bond_unregister_lacpdu(struct bonding
*bond
)
3405 dev_remove_pack(&(BOND_AD_INFO(bond
).ad_pkt_type
));
3408 void bond_register_arp(struct bonding
*bond
)
3410 struct packet_type
*pt
= &bond
->arp_mon_pt
;
3415 pt
->type
= htons(ETH_P_ARP
);
3416 pt
->dev
= bond
->dev
;
3417 pt
->func
= bond_arp_rcv
;
3421 void bond_unregister_arp(struct bonding
*bond
)
3423 struct packet_type
*pt
= &bond
->arp_mon_pt
;
3425 dev_remove_pack(pt
);
3429 /*---------------------------- Hashing Policies -----------------------------*/
3432 * Hash for the output device based upon layer 3 and layer 4 data. If
3433 * the packet is a frag or not TCP or UDP, just use layer 3 data. If it is
3434 * altogether not IP, mimic bond_xmit_hash_policy_l2()
3436 static int bond_xmit_hash_policy_l34(struct sk_buff
*skb
,
3437 struct net_device
*bond_dev
, int count
)
3439 struct ethhdr
*data
= (struct ethhdr
*)skb
->data
;
3440 struct iphdr
*iph
= ip_hdr(skb
);
3441 u16
*layer4hdr
= (u16
*)((u32
*)iph
+ iph
->ihl
);
3444 if (skb
->protocol
== __constant_htons(ETH_P_IP
)) {
3445 if (!(iph
->frag_off
& __constant_htons(IP_MF
|IP_OFFSET
)) &&
3446 (iph
->protocol
== IPPROTO_TCP
||
3447 iph
->protocol
== IPPROTO_UDP
)) {
3448 layer4_xor
= htons((*layer4hdr
^ *(layer4hdr
+ 1)));
3450 return (layer4_xor
^
3451 ((ntohl(iph
->saddr
^ iph
->daddr
)) & 0xffff)) % count
;
3455 return (data
->h_dest
[5] ^ bond_dev
->dev_addr
[5]) % count
;
3459 * Hash for the output device based upon layer 2 data
3461 static int bond_xmit_hash_policy_l2(struct sk_buff
*skb
,
3462 struct net_device
*bond_dev
, int count
)
3464 struct ethhdr
*data
= (struct ethhdr
*)skb
->data
;
3466 return (data
->h_dest
[5] ^ bond_dev
->dev_addr
[5]) % count
;
3469 /*-------------------------- Device entry points ----------------------------*/
3471 static int bond_open(struct net_device
*bond_dev
)
3473 struct bonding
*bond
= bond_dev
->priv
;
3474 struct timer_list
*mii_timer
= &bond
->mii_timer
;
3475 struct timer_list
*arp_timer
= &bond
->arp_timer
;
3477 bond
->kill_timers
= 0;
3479 if ((bond
->params
.mode
== BOND_MODE_TLB
) ||
3480 (bond
->params
.mode
== BOND_MODE_ALB
)) {
3481 struct timer_list
*alb_timer
= &(BOND_ALB_INFO(bond
).alb_timer
);
3483 /* bond_alb_initialize must be called before the timer
3486 if (bond_alb_initialize(bond
, (bond
->params
.mode
== BOND_MODE_ALB
))) {
3487 /* something went wrong - fail the open operation */
3491 init_timer(alb_timer
);
3492 alb_timer
->expires
= jiffies
+ 1;
3493 alb_timer
->data
= (unsigned long)bond
;
3494 alb_timer
->function
= (void *)&bond_alb_monitor
;
3495 add_timer(alb_timer
);
3498 if (bond
->params
.miimon
) { /* link check interval, in milliseconds. */
3499 init_timer(mii_timer
);
3500 mii_timer
->expires
= jiffies
+ 1;
3501 mii_timer
->data
= (unsigned long)bond_dev
;
3502 mii_timer
->function
= (void *)&bond_mii_monitor
;
3503 add_timer(mii_timer
);
3506 if (bond
->params
.arp_interval
) { /* arp interval, in milliseconds. */
3507 init_timer(arp_timer
);
3508 arp_timer
->expires
= jiffies
+ 1;
3509 arp_timer
->data
= (unsigned long)bond_dev
;
3510 if (bond
->params
.mode
== BOND_MODE_ACTIVEBACKUP
) {
3511 arp_timer
->function
= (void *)&bond_activebackup_arp_mon
;
3513 arp_timer
->function
= (void *)&bond_loadbalance_arp_mon
;
3515 if (bond
->params
.arp_validate
)
3516 bond_register_arp(bond
);
3518 add_timer(arp_timer
);
3521 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
3522 struct timer_list
*ad_timer
= &(BOND_AD_INFO(bond
).ad_timer
);
3523 init_timer(ad_timer
);
3524 ad_timer
->expires
= jiffies
+ 1;
3525 ad_timer
->data
= (unsigned long)bond
;
3526 ad_timer
->function
= (void *)&bond_3ad_state_machine_handler
;
3527 add_timer(ad_timer
);
3529 /* register to receive LACPDUs */
3530 bond_register_lacpdu(bond
);
3536 static int bond_close(struct net_device
*bond_dev
)
3538 struct bonding
*bond
= bond_dev
->priv
;
3540 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
3541 /* Unregister the receive of LACPDUs */
3542 bond_unregister_lacpdu(bond
);
3545 if (bond
->params
.arp_validate
)
3546 bond_unregister_arp(bond
);
3548 write_lock_bh(&bond
->lock
);
3551 /* signal timers not to re-arm */
3552 bond
->kill_timers
= 1;
3554 write_unlock_bh(&bond
->lock
);
3556 /* del_timer_sync must run without holding the bond->lock
3557 * because a running timer might be trying to hold it too
3560 if (bond
->params
.miimon
) { /* link check interval, in milliseconds. */
3561 del_timer_sync(&bond
->mii_timer
);
3564 if (bond
->params
.arp_interval
) { /* arp interval, in milliseconds. */
3565 del_timer_sync(&bond
->arp_timer
);
3568 switch (bond
->params
.mode
) {
3569 case BOND_MODE_8023AD
:
3570 del_timer_sync(&(BOND_AD_INFO(bond
).ad_timer
));
3574 del_timer_sync(&(BOND_ALB_INFO(bond
).alb_timer
));
3581 if ((bond
->params
.mode
== BOND_MODE_TLB
) ||
3582 (bond
->params
.mode
== BOND_MODE_ALB
)) {
3583 /* Must be called only after all
3584 * slaves have been released
3586 bond_alb_deinitialize(bond
);
3592 static struct net_device_stats
*bond_get_stats(struct net_device
*bond_dev
)
3594 struct bonding
*bond
= bond_dev
->priv
;
3595 struct net_device_stats
*stats
= &(bond
->stats
), *sstats
;
3596 struct slave
*slave
;
3599 memset(stats
, 0, sizeof(struct net_device_stats
));
3601 read_lock_bh(&bond
->lock
);
3603 bond_for_each_slave(bond
, slave
, i
) {
3604 sstats
= slave
->dev
->get_stats(slave
->dev
);
3605 stats
->rx_packets
+= sstats
->rx_packets
;
3606 stats
->rx_bytes
+= sstats
->rx_bytes
;
3607 stats
->rx_errors
+= sstats
->rx_errors
;
3608 stats
->rx_dropped
+= sstats
->rx_dropped
;
3610 stats
->tx_packets
+= sstats
->tx_packets
;
3611 stats
->tx_bytes
+= sstats
->tx_bytes
;
3612 stats
->tx_errors
+= sstats
->tx_errors
;
3613 stats
->tx_dropped
+= sstats
->tx_dropped
;
3615 stats
->multicast
+= sstats
->multicast
;
3616 stats
->collisions
+= sstats
->collisions
;
3618 stats
->rx_length_errors
+= sstats
->rx_length_errors
;
3619 stats
->rx_over_errors
+= sstats
->rx_over_errors
;
3620 stats
->rx_crc_errors
+= sstats
->rx_crc_errors
;
3621 stats
->rx_frame_errors
+= sstats
->rx_frame_errors
;
3622 stats
->rx_fifo_errors
+= sstats
->rx_fifo_errors
;
3623 stats
->rx_missed_errors
+= sstats
->rx_missed_errors
;
3625 stats
->tx_aborted_errors
+= sstats
->tx_aborted_errors
;
3626 stats
->tx_carrier_errors
+= sstats
->tx_carrier_errors
;
3627 stats
->tx_fifo_errors
+= sstats
->tx_fifo_errors
;
3628 stats
->tx_heartbeat_errors
+= sstats
->tx_heartbeat_errors
;
3629 stats
->tx_window_errors
+= sstats
->tx_window_errors
;
3632 read_unlock_bh(&bond
->lock
);
3637 static int bond_do_ioctl(struct net_device
*bond_dev
, struct ifreq
*ifr
, int cmd
)
3639 struct net_device
*slave_dev
= NULL
;
3640 struct ifbond k_binfo
;
3641 struct ifbond __user
*u_binfo
= NULL
;
3642 struct ifslave k_sinfo
;
3643 struct ifslave __user
*u_sinfo
= NULL
;
3644 struct mii_ioctl_data
*mii
= NULL
;
3647 dprintk("bond_ioctl: master=%s, cmd=%d\n",
3648 bond_dev
->name
, cmd
);
3660 * We do this again just in case we were called by SIOCGMIIREG
3661 * instead of SIOCGMIIPHY.
3668 if (mii
->reg_num
== 1) {
3669 struct bonding
*bond
= bond_dev
->priv
;
3671 read_lock_bh(&bond
->lock
);
3672 read_lock(&bond
->curr_slave_lock
);
3673 if (netif_carrier_ok(bond
->dev
)) {
3674 mii
->val_out
= BMSR_LSTATUS
;
3676 read_unlock(&bond
->curr_slave_lock
);
3677 read_unlock_bh(&bond
->lock
);
3681 case BOND_INFO_QUERY_OLD
:
3682 case SIOCBONDINFOQUERY
:
3683 u_binfo
= (struct ifbond __user
*)ifr
->ifr_data
;
3685 if (copy_from_user(&k_binfo
, u_binfo
, sizeof(ifbond
))) {
3689 res
= bond_info_query(bond_dev
, &k_binfo
);
3691 if (copy_to_user(u_binfo
, &k_binfo
, sizeof(ifbond
))) {
3697 case BOND_SLAVE_INFO_QUERY_OLD
:
3698 case SIOCBONDSLAVEINFOQUERY
:
3699 u_sinfo
= (struct ifslave __user
*)ifr
->ifr_data
;
3701 if (copy_from_user(&k_sinfo
, u_sinfo
, sizeof(ifslave
))) {
3705 res
= bond_slave_info_query(bond_dev
, &k_sinfo
);
3707 if (copy_to_user(u_sinfo
, &k_sinfo
, sizeof(ifslave
))) {
3718 if (!capable(CAP_NET_ADMIN
)) {
3722 down_write(&(bonding_rwsem
));
3723 slave_dev
= dev_get_by_name(ifr
->ifr_slave
);
3725 dprintk("slave_dev=%p: \n", slave_dev
);
3730 dprintk("slave_dev->name=%s: \n", slave_dev
->name
);
3732 case BOND_ENSLAVE_OLD
:
3733 case SIOCBONDENSLAVE
:
3734 res
= bond_enslave(bond_dev
, slave_dev
);
3736 case BOND_RELEASE_OLD
:
3737 case SIOCBONDRELEASE
:
3738 res
= bond_release(bond_dev
, slave_dev
);
3740 case BOND_SETHWADDR_OLD
:
3741 case SIOCBONDSETHWADDR
:
3742 res
= bond_sethwaddr(bond_dev
, slave_dev
);
3744 case BOND_CHANGE_ACTIVE_OLD
:
3745 case SIOCBONDCHANGEACTIVE
:
3746 res
= bond_ioctl_change_active(bond_dev
, slave_dev
);
3755 up_write(&(bonding_rwsem
));
3759 static void bond_set_multicast_list(struct net_device
*bond_dev
)
3761 struct bonding
*bond
= bond_dev
->priv
;
3762 struct dev_mc_list
*dmi
;
3764 write_lock_bh(&bond
->lock
);
3767 * Do promisc before checking multicast_mode
3769 if ((bond_dev
->flags
& IFF_PROMISC
) && !(bond
->flags
& IFF_PROMISC
)) {
3770 bond_set_promiscuity(bond
, 1);
3773 if (!(bond_dev
->flags
& IFF_PROMISC
) && (bond
->flags
& IFF_PROMISC
)) {
3774 bond_set_promiscuity(bond
, -1);
3777 /* set allmulti flag to slaves */
3778 if ((bond_dev
->flags
& IFF_ALLMULTI
) && !(bond
->flags
& IFF_ALLMULTI
)) {
3779 bond_set_allmulti(bond
, 1);
3782 if (!(bond_dev
->flags
& IFF_ALLMULTI
) && (bond
->flags
& IFF_ALLMULTI
)) {
3783 bond_set_allmulti(bond
, -1);
3786 bond
->flags
= bond_dev
->flags
;
3788 /* looking for addresses to add to slaves' mc list */
3789 for (dmi
= bond_dev
->mc_list
; dmi
; dmi
= dmi
->next
) {
3790 if (!bond_mc_list_find_dmi(dmi
, bond
->mc_list
)) {
3791 bond_mc_add(bond
, dmi
->dmi_addr
, dmi
->dmi_addrlen
);
3795 /* looking for addresses to delete from slaves' list */
3796 for (dmi
= bond
->mc_list
; dmi
; dmi
= dmi
->next
) {
3797 if (!bond_mc_list_find_dmi(dmi
, bond_dev
->mc_list
)) {
3798 bond_mc_delete(bond
, dmi
->dmi_addr
, dmi
->dmi_addrlen
);
3802 /* save master's multicast list */
3803 bond_mc_list_destroy(bond
);
3804 bond_mc_list_copy(bond_dev
->mc_list
, bond
, GFP_ATOMIC
);
3806 write_unlock_bh(&bond
->lock
);
3810 * Change the MTU of all of a master's slaves to match the master
3812 static int bond_change_mtu(struct net_device
*bond_dev
, int new_mtu
)
3814 struct bonding
*bond
= bond_dev
->priv
;
3815 struct slave
*slave
, *stop_at
;
3819 dprintk("bond=%p, name=%s, new_mtu=%d\n", bond
,
3820 (bond_dev
? bond_dev
->name
: "None"), new_mtu
);
3822 /* Can't hold bond->lock with bh disabled here since
3823 * some base drivers panic. On the other hand we can't
3824 * hold bond->lock without bh disabled because we'll
3825 * deadlock. The only solution is to rely on the fact
3826 * that we're under rtnl_lock here, and the slaves
3827 * list won't change. This doesn't solve the problem
3828 * of setting the slave's MTU while it is
3829 * transmitting, but the assumption is that the base
3830 * driver can handle that.
3832 * TODO: figure out a way to safely iterate the slaves
3833 * list, but without holding a lock around the actual
3834 * call to the base driver.
3837 bond_for_each_slave(bond
, slave
, i
) {
3838 dprintk("s %p s->p %p c_m %p\n", slave
,
3839 slave
->prev
, slave
->dev
->change_mtu
);
3841 res
= dev_set_mtu(slave
->dev
, new_mtu
);
3844 /* If we failed to set the slave's mtu to the new value
3845 * we must abort the operation even in ACTIVE_BACKUP
3846 * mode, because if we allow the backup slaves to have
3847 * different mtu values than the active slave we'll
3848 * need to change their mtu when doing a failover. That
3849 * means changing their mtu from timer context, which
3850 * is probably not a good idea.
3852 dprintk("err %d %s\n", res
, slave
->dev
->name
);
3857 bond_dev
->mtu
= new_mtu
;
3862 /* unwind from head to the slave that failed */
3864 bond_for_each_slave_from_to(bond
, slave
, i
, bond
->first_slave
, stop_at
) {
3867 tmp_res
= dev_set_mtu(slave
->dev
, bond_dev
->mtu
);
3869 dprintk("unwind err %d dev %s\n", tmp_res
,
3880 * Note that many devices must be down to change the HW address, and
3881 * downing the master releases all slaves. We can make bonds full of
3882 * bonding devices to test this, however.
3884 static int bond_set_mac_address(struct net_device
*bond_dev
, void *addr
)
3886 struct bonding
*bond
= bond_dev
->priv
;
3887 struct sockaddr
*sa
= addr
, tmp_sa
;
3888 struct slave
*slave
, *stop_at
;
3892 dprintk("bond=%p, name=%s\n", bond
, (bond_dev
? bond_dev
->name
: "None"));
3894 if (!is_valid_ether_addr(sa
->sa_data
)) {
3895 return -EADDRNOTAVAIL
;
3898 /* Can't hold bond->lock with bh disabled here since
3899 * some base drivers panic. On the other hand we can't
3900 * hold bond->lock without bh disabled because we'll
3901 * deadlock. The only solution is to rely on the fact
3902 * that we're under rtnl_lock here, and the slaves
3903 * list won't change. This doesn't solve the problem
3904 * of setting the slave's hw address while it is
3905 * transmitting, but the assumption is that the base
3906 * driver can handle that.
3908 * TODO: figure out a way to safely iterate the slaves
3909 * list, but without holding a lock around the actual
3910 * call to the base driver.
3913 bond_for_each_slave(bond
, slave
, i
) {
3914 dprintk("slave %p %s\n", slave
, slave
->dev
->name
);
3916 if (slave
->dev
->set_mac_address
== NULL
) {
3918 dprintk("EOPNOTSUPP %s\n", slave
->dev
->name
);
3922 res
= dev_set_mac_address(slave
->dev
, addr
);
3924 /* TODO: consider downing the slave
3926 * User should expect communications
3927 * breakage anyway until ARP finish
3930 dprintk("err %d %s\n", res
, slave
->dev
->name
);
3936 memcpy(bond_dev
->dev_addr
, sa
->sa_data
, bond_dev
->addr_len
);
3940 memcpy(tmp_sa
.sa_data
, bond_dev
->dev_addr
, bond_dev
->addr_len
);
3941 tmp_sa
.sa_family
= bond_dev
->type
;
3943 /* unwind from head to the slave that failed */
3945 bond_for_each_slave_from_to(bond
, slave
, i
, bond
->first_slave
, stop_at
) {
3948 tmp_res
= dev_set_mac_address(slave
->dev
, &tmp_sa
);
3950 dprintk("unwind err %d dev %s\n", tmp_res
,
3958 static int bond_xmit_roundrobin(struct sk_buff
*skb
, struct net_device
*bond_dev
)
3960 struct bonding
*bond
= bond_dev
->priv
;
3961 struct slave
*slave
, *start_at
;
3965 read_lock(&bond
->lock
);
3967 if (!BOND_IS_OK(bond
)) {
3971 read_lock(&bond
->curr_slave_lock
);
3972 slave
= start_at
= bond
->curr_active_slave
;
3973 read_unlock(&bond
->curr_slave_lock
);
3979 bond_for_each_slave_from(bond
, slave
, i
, start_at
) {
3980 if (IS_UP(slave
->dev
) &&
3981 (slave
->link
== BOND_LINK_UP
) &&
3982 (slave
->state
== BOND_STATE_ACTIVE
)) {
3983 res
= bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
3985 write_lock(&bond
->curr_slave_lock
);
3986 bond
->curr_active_slave
= slave
->next
;
3987 write_unlock(&bond
->curr_slave_lock
);
3996 /* no suitable interface, frame not sent */
3999 read_unlock(&bond
->lock
);
4005 * in active-backup mode, we know that bond->curr_active_slave is always valid if
4006 * the bond has a usable interface.
4008 static int bond_xmit_activebackup(struct sk_buff
*skb
, struct net_device
*bond_dev
)
4010 struct bonding
*bond
= bond_dev
->priv
;
4013 read_lock(&bond
->lock
);
4014 read_lock(&bond
->curr_slave_lock
);
4016 if (!BOND_IS_OK(bond
)) {
4020 if (!bond
->curr_active_slave
)
4023 res
= bond_dev_queue_xmit(bond
, skb
, bond
->curr_active_slave
->dev
);
4027 /* no suitable interface, frame not sent */
4030 read_unlock(&bond
->curr_slave_lock
);
4031 read_unlock(&bond
->lock
);
4036 * In bond_xmit_xor() , we determine the output device by using a pre-
4037 * determined xmit_hash_policy(), If the selected device is not enabled,
4038 * find the next active slave.
4040 static int bond_xmit_xor(struct sk_buff
*skb
, struct net_device
*bond_dev
)
4042 struct bonding
*bond
= bond_dev
->priv
;
4043 struct slave
*slave
, *start_at
;
4048 read_lock(&bond
->lock
);
4050 if (!BOND_IS_OK(bond
)) {
4054 slave_no
= bond
->xmit_hash_policy(skb
, bond_dev
, bond
->slave_cnt
);
4056 bond_for_each_slave(bond
, slave
, i
) {
4065 bond_for_each_slave_from(bond
, slave
, i
, start_at
) {
4066 if (IS_UP(slave
->dev
) &&
4067 (slave
->link
== BOND_LINK_UP
) &&
4068 (slave
->state
== BOND_STATE_ACTIVE
)) {
4069 res
= bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
4076 /* no suitable interface, frame not sent */
4079 read_unlock(&bond
->lock
);
4084 * in broadcast mode, we send everything to all usable interfaces.
4086 static int bond_xmit_broadcast(struct sk_buff
*skb
, struct net_device
*bond_dev
)
4088 struct bonding
*bond
= bond_dev
->priv
;
4089 struct slave
*slave
, *start_at
;
4090 struct net_device
*tx_dev
= NULL
;
4094 read_lock(&bond
->lock
);
4096 if (!BOND_IS_OK(bond
)) {
4100 read_lock(&bond
->curr_slave_lock
);
4101 start_at
= bond
->curr_active_slave
;
4102 read_unlock(&bond
->curr_slave_lock
);
4108 bond_for_each_slave_from(bond
, slave
, i
, start_at
) {
4109 if (IS_UP(slave
->dev
) &&
4110 (slave
->link
== BOND_LINK_UP
) &&
4111 (slave
->state
== BOND_STATE_ACTIVE
)) {
4113 struct sk_buff
*skb2
= skb_clone(skb
, GFP_ATOMIC
);
4115 printk(KERN_ERR DRV_NAME
4116 ": %s: Error: bond_xmit_broadcast(): "
4117 "skb_clone() failed\n",
4122 res
= bond_dev_queue_xmit(bond
, skb2
, tx_dev
);
4124 dev_kfree_skb(skb2
);
4128 tx_dev
= slave
->dev
;
4133 res
= bond_dev_queue_xmit(bond
, skb
, tx_dev
);
4138 /* no suitable interface, frame not sent */
4141 /* frame sent to all suitable interfaces */
4142 read_unlock(&bond
->lock
);
4146 /*------------------------- Device initialization ---------------------------*/
4149 * set bond mode specific net device operations
4151 void bond_set_mode_ops(struct bonding
*bond
, int mode
)
4153 struct net_device
*bond_dev
= bond
->dev
;
4156 case BOND_MODE_ROUNDROBIN
:
4157 bond_dev
->hard_start_xmit
= bond_xmit_roundrobin
;
4159 case BOND_MODE_ACTIVEBACKUP
:
4160 bond_dev
->hard_start_xmit
= bond_xmit_activebackup
;
4163 bond_dev
->hard_start_xmit
= bond_xmit_xor
;
4164 if (bond
->params
.xmit_policy
== BOND_XMIT_POLICY_LAYER34
)
4165 bond
->xmit_hash_policy
= bond_xmit_hash_policy_l34
;
4167 bond
->xmit_hash_policy
= bond_xmit_hash_policy_l2
;
4169 case BOND_MODE_BROADCAST
:
4170 bond_dev
->hard_start_xmit
= bond_xmit_broadcast
;
4172 case BOND_MODE_8023AD
:
4173 bond_set_master_3ad_flags(bond
);
4174 bond_dev
->hard_start_xmit
= bond_3ad_xmit_xor
;
4175 if (bond
->params
.xmit_policy
== BOND_XMIT_POLICY_LAYER34
)
4176 bond
->xmit_hash_policy
= bond_xmit_hash_policy_l34
;
4178 bond
->xmit_hash_policy
= bond_xmit_hash_policy_l2
;
4181 bond_set_master_alb_flags(bond
);
4184 bond_dev
->hard_start_xmit
= bond_alb_xmit
;
4185 bond_dev
->set_mac_address
= bond_alb_set_mac_address
;
4188 /* Should never happen, mode already checked */
4189 printk(KERN_ERR DRV_NAME
4190 ": %s: Error: Unknown bonding mode %d\n",
4197 static void bond_ethtool_get_drvinfo(struct net_device
*bond_dev
,
4198 struct ethtool_drvinfo
*drvinfo
)
4200 strncpy(drvinfo
->driver
, DRV_NAME
, 32);
4201 strncpy(drvinfo
->version
, DRV_VERSION
, 32);
4202 snprintf(drvinfo
->fw_version
, 32, "%d", BOND_ABI_VERSION
);
4205 static const struct ethtool_ops bond_ethtool_ops
= {
4206 .get_tx_csum
= ethtool_op_get_tx_csum
,
4207 .get_tso
= ethtool_op_get_tso
,
4208 .get_ufo
= ethtool_op_get_ufo
,
4209 .get_sg
= ethtool_op_get_sg
,
4210 .get_drvinfo
= bond_ethtool_get_drvinfo
,
4214 * Does not allocate but creates a /proc entry.
4217 static int bond_init(struct net_device
*bond_dev
, struct bond_params
*params
)
4219 struct bonding
*bond
= bond_dev
->priv
;
4221 dprintk("Begin bond_init for %s\n", bond_dev
->name
);
4223 /* initialize rwlocks */
4224 rwlock_init(&bond
->lock
);
4225 rwlock_init(&bond
->curr_slave_lock
);
4227 bond
->params
= *params
; /* copy params struct */
4229 /* Initialize pointers */
4230 bond
->first_slave
= NULL
;
4231 bond
->curr_active_slave
= NULL
;
4232 bond
->current_arp_slave
= NULL
;
4233 bond
->primary_slave
= NULL
;
4234 bond
->dev
= bond_dev
;
4235 INIT_LIST_HEAD(&bond
->vlan_list
);
4237 /* Initialize the device entry points */
4238 bond_dev
->open
= bond_open
;
4239 bond_dev
->stop
= bond_close
;
4240 bond_dev
->get_stats
= bond_get_stats
;
4241 bond_dev
->do_ioctl
= bond_do_ioctl
;
4242 bond_dev
->ethtool_ops
= &bond_ethtool_ops
;
4243 bond_dev
->set_multicast_list
= bond_set_multicast_list
;
4244 bond_dev
->change_mtu
= bond_change_mtu
;
4245 bond_dev
->set_mac_address
= bond_set_mac_address
;
4247 bond_set_mode_ops(bond
, bond
->params
.mode
);
4249 bond_dev
->destructor
= free_netdev
;
4251 /* Initialize the device options */
4252 bond_dev
->tx_queue_len
= 0;
4253 bond_dev
->flags
|= IFF_MASTER
|IFF_MULTICAST
;
4254 bond_dev
->priv_flags
|= IFF_BONDING
;
4256 /* At first, we block adding VLANs. That's the only way to
4257 * prevent problems that occur when adding VLANs over an
4258 * empty bond. The block will be removed once non-challenged
4259 * slaves are enslaved.
4261 bond_dev
->features
|= NETIF_F_VLAN_CHALLENGED
;
4263 /* don't acquire bond device's netif_tx_lock when
4265 bond_dev
->features
|= NETIF_F_LLTX
;
4267 /* By default, we declare the bond to be fully
4268 * VLAN hardware accelerated capable. Special
4269 * care is taken in the various xmit functions
4270 * when there are slaves that are not hw accel
4273 bond_dev
->vlan_rx_register
= bond_vlan_rx_register
;
4274 bond_dev
->vlan_rx_add_vid
= bond_vlan_rx_add_vid
;
4275 bond_dev
->vlan_rx_kill_vid
= bond_vlan_rx_kill_vid
;
4276 bond_dev
->features
|= (NETIF_F_HW_VLAN_TX
|
4277 NETIF_F_HW_VLAN_RX
|
4278 NETIF_F_HW_VLAN_FILTER
);
4280 #ifdef CONFIG_PROC_FS
4281 bond_create_proc_entry(bond
);
4284 list_add_tail(&bond
->bond_list
, &bond_dev_list
);
4289 /* De-initialize device specific data.
4290 * Caller must hold rtnl_lock.
4292 void bond_deinit(struct net_device
*bond_dev
)
4294 struct bonding
*bond
= bond_dev
->priv
;
4296 list_del(&bond
->bond_list
);
4298 #ifdef CONFIG_PROC_FS
4299 bond_remove_proc_entry(bond
);
4303 /* Unregister and free all bond devices.
4304 * Caller must hold rtnl_lock.
4306 static void bond_free_all(void)
4308 struct bonding
*bond
, *nxt
;
4310 list_for_each_entry_safe(bond
, nxt
, &bond_dev_list
, bond_list
) {
4311 struct net_device
*bond_dev
= bond
->dev
;
4313 bond_mc_list_destroy(bond
);
4314 /* Release the bonded slaves */
4315 bond_release_all(bond_dev
);
4316 bond_deinit(bond_dev
);
4317 unregister_netdevice(bond_dev
);
4320 #ifdef CONFIG_PROC_FS
4321 bond_destroy_proc_dir();
4325 /*------------------------- Module initialization ---------------------------*/
4328 * Convert string input module parms. Accept either the
4329 * number of the mode or its string name.
4331 int bond_parse_parm(char *mode_arg
, struct bond_parm_tbl
*tbl
)
4335 for (i
= 0; tbl
[i
].modename
; i
++) {
4336 if ((isdigit(*mode_arg
) &&
4337 tbl
[i
].mode
== simple_strtol(mode_arg
, NULL
, 0)) ||
4338 (strncmp(mode_arg
, tbl
[i
].modename
,
4339 strlen(tbl
[i
].modename
)) == 0)) {
4347 static int bond_check_params(struct bond_params
*params
)
4349 int arp_validate_value
;
4352 * Convert string parameters.
4355 bond_mode
= bond_parse_parm(mode
, bond_mode_tbl
);
4356 if (bond_mode
== -1) {
4357 printk(KERN_ERR DRV_NAME
4358 ": Error: Invalid bonding mode \"%s\"\n",
4359 mode
== NULL
? "NULL" : mode
);
4364 if (xmit_hash_policy
) {
4365 if ((bond_mode
!= BOND_MODE_XOR
) &&
4366 (bond_mode
!= BOND_MODE_8023AD
)) {
4367 printk(KERN_INFO DRV_NAME
4368 ": xor_mode param is irrelevant in mode %s\n",
4369 bond_mode_name(bond_mode
));
4371 xmit_hashtype
= bond_parse_parm(xmit_hash_policy
,
4373 if (xmit_hashtype
== -1) {
4374 printk(KERN_ERR DRV_NAME
4375 ": Error: Invalid xmit_hash_policy \"%s\"\n",
4376 xmit_hash_policy
== NULL
? "NULL" :
4384 if (bond_mode
!= BOND_MODE_8023AD
) {
4385 printk(KERN_INFO DRV_NAME
4386 ": lacp_rate param is irrelevant in mode %s\n",
4387 bond_mode_name(bond_mode
));
4389 lacp_fast
= bond_parse_parm(lacp_rate
, bond_lacp_tbl
);
4390 if (lacp_fast
== -1) {
4391 printk(KERN_ERR DRV_NAME
4392 ": Error: Invalid lacp rate \"%s\"\n",
4393 lacp_rate
== NULL
? "NULL" : lacp_rate
);
4399 if (max_bonds
< 1 || max_bonds
> INT_MAX
) {
4400 printk(KERN_WARNING DRV_NAME
4401 ": Warning: max_bonds (%d) not in range %d-%d, so it "
4402 "was reset to BOND_DEFAULT_MAX_BONDS (%d)\n",
4403 max_bonds
, 1, INT_MAX
, BOND_DEFAULT_MAX_BONDS
);
4404 max_bonds
= BOND_DEFAULT_MAX_BONDS
;
4408 printk(KERN_WARNING DRV_NAME
4409 ": Warning: miimon module parameter (%d), "
4410 "not in range 0-%d, so it was reset to %d\n",
4411 miimon
, INT_MAX
, BOND_LINK_MON_INTERV
);
4412 miimon
= BOND_LINK_MON_INTERV
;
4416 printk(KERN_WARNING DRV_NAME
4417 ": Warning: updelay module parameter (%d), "
4418 "not in range 0-%d, so it was reset to 0\n",
4423 if (downdelay
< 0) {
4424 printk(KERN_WARNING DRV_NAME
4425 ": Warning: downdelay module parameter (%d), "
4426 "not in range 0-%d, so it was reset to 0\n",
4427 downdelay
, INT_MAX
);
4431 if ((use_carrier
!= 0) && (use_carrier
!= 1)) {
4432 printk(KERN_WARNING DRV_NAME
4433 ": Warning: use_carrier module parameter (%d), "
4434 "not of valid value (0/1), so it was set to 1\n",
4439 /* reset values for 802.3ad */
4440 if (bond_mode
== BOND_MODE_8023AD
) {
4442 printk(KERN_WARNING DRV_NAME
4443 ": Warning: miimon must be specified, "
4444 "otherwise bonding will not detect link "
4445 "failure, speed and duplex which are "
4446 "essential for 802.3ad operation\n");
4447 printk(KERN_WARNING
"Forcing miimon to 100msec\n");
4452 /* reset values for TLB/ALB */
4453 if ((bond_mode
== BOND_MODE_TLB
) ||
4454 (bond_mode
== BOND_MODE_ALB
)) {
4456 printk(KERN_WARNING DRV_NAME
4457 ": Warning: miimon must be specified, "
4458 "otherwise bonding will not detect link "
4459 "failure and link speed which are essential "
4460 "for TLB/ALB load balancing\n");
4461 printk(KERN_WARNING
"Forcing miimon to 100msec\n");
4466 if (bond_mode
== BOND_MODE_ALB
) {
4467 printk(KERN_NOTICE DRV_NAME
4468 ": In ALB mode you might experience client "
4469 "disconnections upon reconnection of a link if the "
4470 "bonding module updelay parameter (%d msec) is "
4471 "incompatible with the forwarding delay time of the "
4477 if (updelay
|| downdelay
) {
4478 /* just warn the user the up/down delay will have
4479 * no effect since miimon is zero...
4481 printk(KERN_WARNING DRV_NAME
4482 ": Warning: miimon module parameter not set "
4483 "and updelay (%d) or downdelay (%d) module "
4484 "parameter is set; updelay and downdelay have "
4485 "no effect unless miimon is set\n",
4486 updelay
, downdelay
);
4489 /* don't allow arp monitoring */
4491 printk(KERN_WARNING DRV_NAME
4492 ": Warning: miimon (%d) and arp_interval (%d) "
4493 "can't be used simultaneously, disabling ARP "
4495 miimon
, arp_interval
);
4499 if ((updelay
% miimon
) != 0) {
4500 printk(KERN_WARNING DRV_NAME
4501 ": Warning: updelay (%d) is not a multiple "
4502 "of miimon (%d), updelay rounded to %d ms\n",
4503 updelay
, miimon
, (updelay
/ miimon
) * miimon
);
4508 if ((downdelay
% miimon
) != 0) {
4509 printk(KERN_WARNING DRV_NAME
4510 ": Warning: downdelay (%d) is not a multiple "
4511 "of miimon (%d), downdelay rounded to %d ms\n",
4513 (downdelay
/ miimon
) * miimon
);
4516 downdelay
/= miimon
;
4519 if (arp_interval
< 0) {
4520 printk(KERN_WARNING DRV_NAME
4521 ": Warning: arp_interval module parameter (%d) "
4522 ", not in range 0-%d, so it was reset to %d\n",
4523 arp_interval
, INT_MAX
, BOND_LINK_ARP_INTERV
);
4524 arp_interval
= BOND_LINK_ARP_INTERV
;
4527 for (arp_ip_count
= 0;
4528 (arp_ip_count
< BOND_MAX_ARP_TARGETS
) && arp_ip_target
[arp_ip_count
];
4530 /* not complete check, but should be good enough to
4532 if (!isdigit(arp_ip_target
[arp_ip_count
][0])) {
4533 printk(KERN_WARNING DRV_NAME
4534 ": Warning: bad arp_ip_target module parameter "
4535 "(%s), ARP monitoring will not be performed\n",
4536 arp_ip_target
[arp_ip_count
]);
4539 u32 ip
= in_aton(arp_ip_target
[arp_ip_count
]);
4540 arp_target
[arp_ip_count
] = ip
;
4544 if (arp_interval
&& !arp_ip_count
) {
4545 /* don't allow arping if no arp_ip_target given... */
4546 printk(KERN_WARNING DRV_NAME
4547 ": Warning: arp_interval module parameter (%d) "
4548 "specified without providing an arp_ip_target "
4549 "parameter, arp_interval was reset to 0\n",
4555 if (bond_mode
!= BOND_MODE_ACTIVEBACKUP
) {
4556 printk(KERN_ERR DRV_NAME
4557 ": arp_validate only supported in active-backup mode\n");
4560 if (!arp_interval
) {
4561 printk(KERN_ERR DRV_NAME
4562 ": arp_validate requires arp_interval\n");
4566 arp_validate_value
= bond_parse_parm(arp_validate
,
4568 if (arp_validate_value
== -1) {
4569 printk(KERN_ERR DRV_NAME
4570 ": Error: invalid arp_validate \"%s\"\n",
4571 arp_validate
== NULL
? "NULL" : arp_validate
);
4575 arp_validate_value
= 0;
4578 printk(KERN_INFO DRV_NAME
4579 ": MII link monitoring set to %d ms\n",
4581 } else if (arp_interval
) {
4584 printk(KERN_INFO DRV_NAME
4585 ": ARP monitoring set to %d ms, validate %s, with %d target(s):",
4587 arp_validate_tbl
[arp_validate_value
].modename
,
4590 for (i
= 0; i
< arp_ip_count
; i
++)
4591 printk (" %s", arp_ip_target
[i
]);
4596 /* miimon and arp_interval not set, we need one so things
4597 * work as expected, see bonding.txt for details
4599 printk(KERN_WARNING DRV_NAME
4600 ": Warning: either miimon or arp_interval and "
4601 "arp_ip_target module parameters must be specified, "
4602 "otherwise bonding will not detect link failures! see "
4603 "bonding.txt for details.\n");
4606 if (primary
&& !USES_PRIMARY(bond_mode
)) {
4607 /* currently, using a primary only makes sense
4608 * in active backup, TLB or ALB modes
4610 printk(KERN_WARNING DRV_NAME
4611 ": Warning: %s primary device specified but has no "
4612 "effect in %s mode\n",
4613 primary
, bond_mode_name(bond_mode
));
4617 /* fill params struct with the proper values */
4618 params
->mode
= bond_mode
;
4619 params
->xmit_policy
= xmit_hashtype
;
4620 params
->miimon
= miimon
;
4621 params
->arp_interval
= arp_interval
;
4622 params
->arp_validate
= arp_validate_value
;
4623 params
->updelay
= updelay
;
4624 params
->downdelay
= downdelay
;
4625 params
->use_carrier
= use_carrier
;
4626 params
->lacp_fast
= lacp_fast
;
4627 params
->primary
[0] = 0;
4630 strncpy(params
->primary
, primary
, IFNAMSIZ
);
4631 params
->primary
[IFNAMSIZ
- 1] = 0;
4634 memcpy(params
->arp_targets
, arp_target
, sizeof(arp_target
));
4639 static struct lock_class_key bonding_netdev_xmit_lock_key
;
4641 /* Create a new bond based on the specified name and bonding parameters.
4642 * If name is NULL, obtain a suitable "bond%d" name for us.
4643 * Caller must NOT hold rtnl_lock; we need to release it here before we
4644 * set up our sysfs entries.
4646 int bond_create(char *name
, struct bond_params
*params
, struct bonding
**newbond
)
4648 struct net_device
*bond_dev
;
4652 bond_dev
= alloc_netdev(sizeof(struct bonding
), name
? name
: "",
4655 printk(KERN_ERR DRV_NAME
4656 ": %s: eek! can't alloc netdev!\n",
4663 res
= dev_alloc_name(bond_dev
, "bond%d");
4668 /* bond_init() must be called after dev_alloc_name() (for the
4669 * /proc files), but before register_netdevice(), because we
4670 * need to set function pointers.
4673 res
= bond_init(bond_dev
, params
);
4678 SET_MODULE_OWNER(bond_dev
);
4680 res
= register_netdevice(bond_dev
);
4685 lockdep_set_class(&bond_dev
->_xmit_lock
, &bonding_netdev_xmit_lock_key
);
4688 *newbond
= bond_dev
->priv
;
4690 netif_carrier_off(bond_dev
);
4692 rtnl_unlock(); /* allows sysfs registration of net device */
4693 res
= bond_create_sysfs_entry(bond_dev
->priv
);
4702 bond_deinit(bond_dev
);
4704 free_netdev(bond_dev
);
4710 static int __init
bonding_init(void)
4715 printk(KERN_INFO
"%s", version
);
4717 res
= bond_check_params(&bonding_defaults
);
4722 #ifdef CONFIG_PROC_FS
4723 bond_create_proc_dir();
4725 for (i
= 0; i
< max_bonds
; i
++) {
4726 res
= bond_create(NULL
, &bonding_defaults
, NULL
);
4731 res
= bond_create_sysfs();
4735 register_netdevice_notifier(&bond_netdev_notifier
);
4736 register_inetaddr_notifier(&bond_inetaddr_notifier
);
4742 bond_destroy_sysfs();
4749 static void __exit
bonding_exit(void)
4751 unregister_netdevice_notifier(&bond_netdev_notifier
);
4752 unregister_inetaddr_notifier(&bond_inetaddr_notifier
);
4756 bond_destroy_sysfs();
4760 module_init(bonding_init
);
4761 module_exit(bonding_exit
);
4762 MODULE_LICENSE("GPL");
4763 MODULE_VERSION(DRV_VERSION
);
4764 MODULE_DESCRIPTION(DRV_DESCRIPTION
", v" DRV_VERSION
);
4765 MODULE_AUTHOR("Thomas Davis, tadavis@lbl.gov and many others");
4766 MODULE_SUPPORTED_DEVICE("most ethernet devices");